Features
========
-- This is a complete rewrite of the NTFS driver that used to be in the kernel.
- This new driver implements NTFS read support and is functionally equivalent
- to the old ntfs driver.
+- This is a complete rewrite of the NTFS driver that used to be in the 2.4 and
+ earlier kernels. This new driver implements NTFS read support and is
+ functionally equivalent to the old ntfs driver and it also implements limited
+ write support. The biggest limitation at present is that files/directories
+ cannot be created or deleted. See below for the list of write features that
+ are so far supported. Another limitation is that writing to compressed files
+ is not implemented at all. Also, neither read nor write access to encrypted
+ files is so far implemented.
- The new driver has full support for sparse files on NTFS 3.x volumes which
the old driver isn't happy with.
- The new driver supports execution of binaries due to mmap() now being
- The new driver supports fsync(2), fdatasync(2), and msync(2).
- The new driver supports readv(2) and writev(2).
- The new driver supports access time updates (including mtime and ctime).
-
+- The new driver supports truncate(2) and open(2) with O_TRUNC. But at present
+ only very limited support for highly fragmented files, i.e. ones which have
+ their data attribute split across multiple extents, is included. Another
+ limitation is that at present truncate(2) will never create sparse files,
+ since to mark a file sparse we need to modify the directory entry for the
+ file and we do not implement directory modifications yet.
+- The new driver supports write(2) which can both overwrite existing data and
+ extend the file size so that you can write beyond the existing data. Also,
+ writing into sparse regions is supported and the holes are filled in with
+ clusters. But at present only limited support for highly fragmented files,
+ i.e. ones which have their data attribute split across multiple extents, is
+ included. Another limitation is that write(2) will never create sparse
+ files, since to mark a file sparse we need to modify the directory entry for
+ the file and we do not implement directory modifications yet.
Supported mount options
=======================
Note, a technical ChangeLog aimed at kernel hackers is in fs/ntfs/ChangeLog.
+2.1.25:
+ - Write support is now extended with write(2) being able to both
+ overwrite existing file data and to extend files. Also, if a write
+ to a sparse region occurs, write(2) will fill in the hole. Note,
+ mmap(2) based writes still do not support writing into holes or
+ writing beyond the initialized size.
+ - Write support has a new feature and that is that truncate(2) and
+ open(2) with O_TRUNC are now implemented thus files can be both made
+ smaller and larger.
+ - Note: Both write(2) and truncate(2)/open(2) with O_TRUNC still have
+ limitations in that they
+ - only provide limited support for highly fragmented files.
+ - only work on regular, i.e. uncompressed and unencrypted files.
+ - never create sparse files although this will change once directory
+ operations are implemented.
+ - Lots of bug fixes and enhancements across the board.
2.1.24:
- Support journals ($LogFile) which have been modified by chkdsk. This
means users can boot into Windows after we marked the volume dirty.
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/string.h>
-#include <linux/slab.h>
-
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/hardware/scoop.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/setup.h>
#include <asm/types.h>
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/init.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/list.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/sysdev.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/list.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/fs.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/fs.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/bitops.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <linux/serial.h>
#include <linux/sched.h>
#include <linux/tty.h>
+#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/bootmem.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <asm/hardware.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/kernel.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
*/
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/mtd/mtd.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
*/
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/kernel.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/module.h>
#include <asm/arch/akita.h>
#include <asm/arch/corgi.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/pm.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/fb.h>
#include <asm/setup.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/major.h>
#include <linux/fb.h>
*/
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
*/
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/fb.h>
#include <asm/hardware.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pm.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
* 10-Feb-2005 BJD Added camera from guillaume.gourat@nexvision.tv
*/
#include <linux/config.h>
+#include <linux/platform_device.h>
extern struct platform_device *s3c24xx_uart_devs[];
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dm9000.h>
#include <asm/mach/arch.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
+#include <linux/platform_device.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/kthread.h>
#include <asm/mach/arch.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/string.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/mtd/map.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/console.h>
+#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
+#include <linux/platform_device.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
+#include <linux/platform_device.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <asm/mach/arch.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/tty.h>
#include <linux/mtd/mtd.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/tty.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/timer.h>
#include <linux/cpufreq.h>
#include <linux/ioport.h>
#include <linux/sched.h> /* just for sched_clock() - funny that */
+#include <linux/platform_device.h>
#include <asm/div64.h>
#include <asm/hardware.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/tty.h>
#include <linux/ioport.h>
#include <linux/serial_core.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>
#include <asm/hardware.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/pm.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
#include <linux/sysdev.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/usb_otg.h>
#include <asm/io.h>
bool
depends on X86_SMP || (X86_VOYAGER && SMP)
default y
-
-config PC
- bool
- depends on X86 && !EMBEDDED
- default y
void __init init_apic_mappings(void)
{
- unsigned int orig_apicid;
unsigned long apic_phys;
/*
* Fetch the APIC ID of the BSP in case we have a
* default configuration (or the MP table is broken).
*/
- orig_apicid = boot_cpu_physical_apicid;
- boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
- if ((orig_apicid != -1U) && (orig_apicid != boot_cpu_physical_apicid))
- printk(KERN_WARNING "Boot APIC ID in local APIC unexpected (%d vs %d)",
- orig_apicid, boot_cpu_physical_apicid);
+ if (boot_cpu_physical_apicid == -1U)
+ boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
#ifdef CONFIG_X86_IO_APIC
{
}
/*
- * This initializes the IO-APIC and APIC hardware.
+ * This initializes the IO-APIC and APIC hardware if this is
+ * a UP kernel.
*/
-int __init APIC_init(void)
+int __init APIC_init_uniprocessor (void)
{
- if (enable_local_apic < 0) {
- printk(KERN_INFO "APIC disabled\n");
- return -1;
- }
+ if (enable_local_apic < 0)
+ clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
- /* See if we have a SMP configuration or have forced enabled
- * the local apic.
- */
- if (!smp_found_config && !acpi_lapic && !cpu_has_apic) {
- enable_local_apic = -1;
+ if (!smp_found_config && !cpu_has_apic)
return -1;
- }
/*
- * Complain if the BIOS pretends there is an apic.
- * Then get out because we don't have an a local apic.
+ * Complain if the BIOS pretends there is one.
*/
if (!cpu_has_apic && APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) {
printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
boot_cpu_physical_apicid);
- printk(KERN_ERR "... forcing use of dummy APIC emulation. (tell your hw vendor)\n");
- enable_local_apic = -1;
return -1;
}
verify_local_APIC();
- /*
- * Should not be necessary because the MP table should list the boot
- * CPU too, but we do it for the sake of robustness anyway.
- * Makes no sense to do this check in clustered apic mode, so skip it
- */
- if (!check_phys_apicid_present(boot_cpu_physical_apicid)) {
- printk("weird, boot CPU (#%d) not listed by the BIOS.\n",
- boot_cpu_physical_apicid);
- physid_set(boot_cpu_physical_apicid, phys_cpu_present_map);
- }
-
- /*
- * Switch from PIC to APIC mode.
- */
connect_bsp_APIC();
- setup_local_APIC();
-#ifdef CONFIG_X86_IO_APIC
- /*
- * Now start the IO-APICs
- */
- if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
- setup_IO_APIC();
-#endif
- return 0;
-}
+ phys_cpu_present_map = physid_mask_of_physid(boot_cpu_physical_apicid);
-void __init APIC_late_time_init(void)
-{
- /* Improve our loops per jiffy estimate */
- loops_per_jiffy = ((1000 + HZ - 1)/HZ)*cpu_khz;
- boot_cpu_data.loops_per_jiffy = loops_per_jiffy;
- cpu_data[0].loops_per_jiffy = loops_per_jiffy;
-
- /* setup_apic_nmi_watchdog doesn't work properly before cpu_khz is
- * initialized. So redo it here to ensure the boot cpu is setup
- * properly.
- */
- if (nmi_watchdog == NMI_LOCAL_APIC)
- setup_apic_nmi_watchdog();
+ setup_local_APIC();
#ifdef CONFIG_X86_IO_APIC
- if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
- IO_APIC_late_time_init();
+ if (smp_found_config)
+ if (!skip_ioapic_setup && nr_ioapics)
+ setup_IO_APIC();
#endif
setup_boot_APIC_clock();
+
+ return 0;
}
setup_irq(FPU_IRQ, &fpu_irq);
irq_ctx_init(smp_processor_id());
-
-#ifdef CONFIG_X86_LOCAL_APIC
- APIC_init();
-#endif
}
sync_Arb_IDs();
setup_IO_APIC_irqs();
init_IO_APIC_traps();
+ check_timer();
if (!acpi_ioapic)
print_IO_APIC();
}
-void __init IO_APIC_late_time_init(void)
-{
- check_timer();
-}
-
/*
* Called after all the initialization is done. If we didnt find any
* APIC bugs then we can allow the modify fast path
EXPORT_SYMBOL(xquad_portio);
#endif
-/*
- * Fall back to non SMP mode after errors.
- *
- */
-static __init void disable_smp(void)
-{
- cpu_set(0, cpu_sibling_map[0]);
- cpu_set(0, cpu_core_map[0]);
-}
-
static void __init smp_boot_cpus(unsigned int max_cpus)
{
int apicid, cpu, bit, kicked;
printk("CPU%d: ", 0);
print_cpu_info(&cpu_data[0]);
+ boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
boot_cpu_logical_apicid = logical_smp_processor_id();
x86_cpu_to_apicid[0] = boot_cpu_physical_apicid;
cpus_clear(cpu_core_map[0]);
cpu_set(0, cpu_core_map[0]);
- map_cpu_to_logical_apicid();
-
/*
* If we couldn't find an SMP configuration at boot time,
* get out of here now!
*/
if (!smp_found_config && !acpi_lapic) {
printk(KERN_NOTICE "SMP motherboard not detected.\n");
- disable_smp();
+ smpboot_clear_io_apic_irqs();
+ phys_cpu_present_map = physid_mask_of_physid(0);
+ if (APIC_init_uniprocessor())
+ printk(KERN_NOTICE "Local APIC not detected."
+ " Using dummy APIC emulation.\n");
+ map_cpu_to_logical_apicid();
+ cpu_set(0, cpu_sibling_map[0]);
+ cpu_set(0, cpu_core_map[0]);
+ return;
+ }
+
+ /*
+ * Should not be necessary because the MP table should list the boot
+ * CPU too, but we do it for the sake of robustness anyway.
+ * Makes no sense to do this check in clustered apic mode, so skip it
+ */
+ if (!check_phys_apicid_present(boot_cpu_physical_apicid)) {
+ printk("weird, boot CPU (#%d) not listed by the BIOS.\n",
+ boot_cpu_physical_apicid);
+ physid_set(hard_smp_processor_id(), phys_cpu_present_map);
+ }
+
+ /*
+ * If we couldn't find a local APIC, then get out of here now!
+ */
+ if (APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid]) && !cpu_has_apic) {
+ printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
+ boot_cpu_physical_apicid);
+ printk(KERN_ERR "... forcing use of dummy APIC emulation. (tell your hw vendor)\n");
+ smpboot_clear_io_apic_irqs();
+ phys_cpu_present_map = physid_mask_of_physid(0);
+ cpu_set(0, cpu_sibling_map[0]);
+ cpu_set(0, cpu_core_map[0]);
return;
}
+ verify_local_APIC();
+
/*
* If SMP should be disabled, then really disable it!
*/
- if (!max_cpus || (enable_local_apic < 0)) {
- printk(KERN_INFO "SMP mode deactivated.\n");
- disable_smp();
+ if (!max_cpus) {
+ smp_found_config = 0;
+ printk(KERN_INFO "SMP mode deactivated, forcing use of dummy APIC emulation.\n");
+ smpboot_clear_io_apic_irqs();
+ phys_cpu_present_map = physid_mask_of_physid(0);
+ cpu_set(0, cpu_sibling_map[0]);
+ cpu_set(0, cpu_core_map[0]);
return;
}
+ connect_bsp_APIC();
+ setup_local_APIC();
+ map_cpu_to_logical_apicid();
+
+
setup_portio_remap();
/*
cpu_set(0, cpu_sibling_map[0]);
cpu_set(0, cpu_core_map[0]);
+ smpboot_setup_io_apic();
+
+ setup_boot_APIC_clock();
+
/*
* Synchronize the TSC with the AP
*/
device_initcall(time_init_device);
-extern void (*late_time_init)(void);
#ifdef CONFIG_HPET_TIMER
+extern void (*late_time_init)(void);
/* Duplicate of time_init() below, with hpet_enable part added */
static void __init hpet_time_init(void)
{
printk(KERN_INFO "Using %s for high-res timesource\n",cur_timer->name);
time_init_hook();
-
-#ifdef CONFIG_X86_LOCAL_APIC
- if (enable_local_apic >= 0)
- APIC_late_time_init();
-#endif
}
#endif
printk(KERN_INFO "Using %s for high-res timesource\n",cur_timer->name);
time_init_hook();
-
-#ifdef CONFIG_X86_LOCAL_APIC
- if (enable_local_apic >= 0)
- late_time_init = APIC_late_time_init;
-#endif
}
*/
static u16 toshiba_line_size;
-static struct dmi_system_id __devinit toshiba_ohci1394_dmi_table[] = {
+static struct dmi_system_id __devinitdata toshiba_ohci1394_dmi_table[] = {
{
.ident = "Toshiba PS5 based laptop",
.matches = {
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/m32r.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/m32r.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/m32r.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/m32r.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/m32r.h>
*/
#include <linux/config.h>
#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/resource.h>
*/
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
#include <platforms/4xx/ibm440ep.h>
#include <asm/ocp.h>
#include <asm/ppc4xx_pic.h>
*/
#include <linux/init.h>
+#include <linux/platform_device.h>
#include <asm/ocp.h>
#include <asm/ppc4xx_pic.h>
#include <platforms/4xx/ibmstb4.h>
#include <linux/config.h>
#include <linux/init.h>
#include <linux/pagemap.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <linux/config.h>
#include <linux/init.h>
#include <linux/pagemap.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/ppc4xx_pic.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/mv643xx.h>
#include <linux/pci.h>
#include <linux/initrd.h>
#include <linux/root_dev.h>
#include <linux/mv643xx.h>
+#include <linux/platform_device.h>
#include <asm/bootinfo.h>
#include <asm/machdep.h>
#include <asm/todc.h>
#include <linux/console.h>
#include <linux/initrd.h>
#include <linux/root_dev.h>
+#include <linux/platform_device.h>
#if !defined(CONFIG_SERIAL_MPSC_CONSOLE)
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/bootmem.h>
#include <linux/mtd/physmap.h>
#include <linux/mv643xx.h>
+#include <linux/platform_device.h>
#ifdef CONFIG_BOOTIMG
#include <linux/bootimg.h>
#endif
#include <linux/irq.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
+#include <linux/platform_device.h>
#include <linux/initrd.h>
#include <linux/root_dev.h>
#include <linux/seq_file.h>
#include <linux/mtd/physmap.h>
#include <linux/mv643xx.h>
+#include <linux/platform_device.h>
#ifdef CONFIG_BOOTIMG
#include <linux/bootimg.h>
#endif
#include <linux/serial_core.h>
#include <linux/mv643xx.h>
#include <linux/netdevice.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <linux/fsl_devices.h>
#include <linux/resource.h>
+#include <linux/platform_device.h>
#include <asm/mpc52xx.h>
#include <asm/ppc_sys.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/mv643xx.h>
+#include <linux/platform_device.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <asm/cpm2.h>
#include <asm/irq.h>
#include <linux/config.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/mach/irq.h>
#include "linux/ctype.h"
#include "linux/bootmem.h"
#include "linux/ethtool.h"
+#include "linux/platform_device.h"
#include "asm/uaccess.h"
#include "user_util.h"
#include "kern_util.h"
#include "linux/blkpg.h"
#include "linux/genhd.h"
#include "linux/spinlock.h"
+#include "linux/platform_device.h"
#include "asm/segment.h"
#include "asm/uaccess.h"
#include "asm/irq.h"
#include <linux/ethtool.h>
#include <linux/rtnetlink.h>
#include <linux/timer.h>
+#include <linux/platform_device.h>
#include <xtensa/simcall.h>
* information.
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
if (!atomic_dec_and_test(&cfqd->ref))
return;
- blk_put_queue(q);
-
cfq_shutdown_timer_wq(cfqd);
- q->elevator->elevator_data = NULL;
+ blk_put_queue(q);
mempool_destroy(cfqd->crq_pool);
kfree(cfqd->crq_hash);
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/devfs_fs_kernel.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/buffer_head.h> /* for invalidate_buffers() */
/*
static void elevator_noop_add_request(request_queue_t *q, struct request *rq)
{
+ rq->flags |= REQ_NOMERGE;
elv_dispatch_add_tail(q, rq);
}
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/rtc.h>
#include <linux/bcd.h>
#include <linux/dmi.h>
#include <linux/err.h>
#include <linux/kfifo.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <asm/io.h>
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/module.h>
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/init.h>
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/hardware/arm_twd.h>
#include <asm/uaccess.h>
}
static struct device_driver mpcore_wdt_driver = {
+ .owner = THIS_MODULE,
.name = "mpcore_wdt",
.bus = &platform_bus_type,
.probe = mpcore_wdt_probe,
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/watchdog.h>
+#include <linux/platform_device.h>
+
#include <asm/mv64x60.h>
#include <asm/uaccess.h>
#include <asm/io.h>
}
static struct device_driver mv64x60_wdt_driver = {
+ .owner = THIS_MODULE,
.name = MV64x60_WDT_NAME,
.bus = &platform_bus_type,
.probe = mv64x60_wdt_probe,
/*
* Berkshire PCI-PC Watchdog Card Driver
*
- * (c) Copyright 2003 Wim Van Sebroeck <wim@iguana.be>.
+ * (c) Copyright 2003-2005 Wim Van Sebroeck <wim@iguana.be>.
*
* Based on source code of the following authors:
* Ken Hollis <kenji@bitgate.com>,
*/
/*
- * A bells and whistles driver is available from http://www.pcwd.de/
+ * A bells and whistles driver is available from:
+ * http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/
+ *
* More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
*/
#include <linux/watchdog.h>
#include <linux/fs.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <asm/uaccess.h>
static struct device_driver s3c2410wdt_driver = {
+ .owner = THIS_MODULE,
.name = "s3c2410-wdt",
.bus = &platform_bus_type,
.probe = s3c2410wdt_probe,
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pádraig Brady <P@draigBrady.com>");
-MODULE_DESCRIPTION("w38627hf WDT driver");
+MODULE_DESCRIPTION("w83627hf WDT driver");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
#include <linux/config.h>
#include <linux/kernel.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/eisa.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
* GNU General Public License for more details.
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/blkdev.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
*/
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/sched.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/i2c-isa.h>
+#include <linux/platform_device.h>
static u32 isa_func(struct i2c_adapter *adapter);
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/pci.h>
+#include <linux/platform_device.h>
+
#include <asm/io.h>
#include <linux/fsl_devices.h>
#include <linux/i2c.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mv643xx.h>
+#include <linux/platform_device.h>
+
#include <asm/io.h>
/* Register defines */
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/i2c-pxa.h>
+#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/err.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/irq.h>
int ret;
ret = driver_register(&s3c2410_i2c_driver);
- if (ret == 0)
- ret = driver_register(&s3c2440_i2c_driver);
+ if (ret == 0) {
+ ret = driver_register(&s3c2440_i2c_driver);
+ if (ret)
+ driver_unregister(&s3c2410_i2c_driver);
+ }
return ret;
}
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/usb_ch9.h>
#include <linux/usb_gadget.h>
#include <linux/usb.h>
#include <linux/init.h>
#include <linux/idr.h>
#include <linux/seq_file.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
static struct i2c_client i2cdev_client_template;
case EV_LED: bits = dev->ledbit; max = LED_MAX; break;
case EV_SND: bits = dev->sndbit; max = SND_MAX; break;
case EV_FF: bits = dev->ffbit; max = FF_MAX; break;
+ case EV_SW: bits = dev->swbit; max = SW_MAX; break;
default: return -EINVAL;
}
bit_to_user(bits, max);
if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
bit_to_user(dev->snd, SND_MAX);
+ if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
+ bit_to_user(dev->sw, SW_MAX);
+
if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0))) {
int len;
if (!dev->name) return -ENOENT;
"input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
path = kobject_get_path(&dev->cdev.class->subsys.kset.kobj, GFP_KERNEL);
- printk(KERN_INFO "input: %s/%s as %s\n",
+ printk(KERN_INFO "input: %s as %s/%s\n",
dev->name ? dev->name : "Unspecified device",
path ? path : "", dev->cdev.class_id);
kfree(path);
if INPUT_KEYBOARD
config KEYBOARD_ATKBD
- tristate "AT keyboard" if !PC
+ tristate "AT keyboard" if !X86_PC
default y
select SERIO
select SERIO_LIBPS2
- select SERIO_I8042 if PC
+ select SERIO_I8042 if X86_PC
select SERIO_GSCPS2 if GSC
help
Say Y here if you want to use a standard AT or PS/2 keyboard. Usually
*/
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
input_sync (lk->dev);
break;
case LK_METRONOME:
- DBG (KERN_INFO "Got %#d and don't "
+ DBG (KERN_INFO "Got LK_METRONOME and don't "
"know how to handle...\n");
break;
case LK_OUTPUT_ERROR:
*/
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
return -ENOMEM;
pcspkr_dev->name = "PC Speaker";
- pcspkr_dev->name = "isa0061/input0";
+ pcspkr_dev->phys = "isa0061/input0";
pcspkr_dev->id.bustype = BUS_ISA;
pcspkr_dev->id.vendor = 0x001f;
pcspkr_dev->id.product = 0x0001;
default y
select SERIO
select SERIO_LIBPS2
- select SERIO_I8042 if PC
+ select SERIO_I8042 if X86_PC
select SERIO_GSCPS2 if GSC
---help---
Say Y here if you have a PS/2 mouse connected to your system. This
#include <linux/serio.h>
#include <linux/errno.h>
#include <linux/err.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <linux/serio.h>
#include <linux/err.h>
#include <linux/rcupdate.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/bitops.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/init.h>
#include <linux/serio.h>
#include <linux/err.h>
+#include <linux/platform_device.h>
#include <asm/irq.h>
#include <asm/hardware.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
sprintf(hid->phys, "adb%d:%d.%02x/input", id, default_id, original_handler_id);
+ hid->input = input_dev;
hid->id = default_id;
hid->original_handler_id = original_handler_id;
hid->current_handler_id = current_handler_id;
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/dma.h>
#include <asm/hardware.h>
#include <linux/miscdevice.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <linux/hdpu_features.h>
#include <linux/hdpu_features.h>
#include <linux/pci.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
static int hdpu_nexus_probe(struct device *ddev);
static int hdpu_nexus_remove(struct device *ddev);
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/slab.h>
-
+#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/mtd/mtd.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/slab.h>
+#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/slab.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/mtd/mtd.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/unistd.h>
#include <linux/ctype.h>
#include <linux/moduleparam.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>
#include <linux/mii.h>
#include <linux/dm9000.h>
#include <linux/delay.h>
+#include <linux/platform_device.h>
#include <asm/delay.h>
#include <asm/irq.h>
#include <linux/if_vlan.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
+#include <linux/platform_device.h>
#include <asm/ocp.h>
#include <linux/crc32.h>
#include <linux/mii.h>
#include <linux/rtnetlink.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
#include <linux/pm.h>
#include <net/irda/irda.h>
#include <linux/rtnetlink.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <net/irda/irda.h>
#include <linux/rtnetlink.h>
#include <linux/serial_reg.h>
#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <asm/bootinfo.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <asm/bootinfo.h>
#include <linux/sched.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/mips-boards/simint.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/ethtool.h>
+#include <linux/platform_device.h>
+
#include <asm/io.h>
#include <asm/types.h>
#include <asm/pgtable.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/crc32.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/trdevice.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/io.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/trdevice.h>
+#include <linux/platform_device.h>
#include <asm/system.h>
#include <asm/io.h>
#include <linux/notifier.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/errno.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/hd64465/hd64465.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/bitops.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/bitops.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/bitops.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
+#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <pcmcia/ss.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/config.h>
+#include <linux/platform_device.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/types.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <linux/init.h>
#include <linux/completion.h>
#include <linux/transport_class.h>
+#include <linux/platform_device.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
return;
}
count = min(pc->sg->length - pc->b_count, bcount);
- buf = kmap_atomic(pc->sg->page, KM_IRQ0);
- drive->hwif->atapi_input_bytes(drive,
- buf + pc->b_count + pc->sg->offset, count);
- kunmap_atomic(buf, KM_IRQ0);
- bcount -= count;
- pc->b_count += count;
+ if (PageHighMem(pc->sg->page)) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ buf = kmap_atomic(pc->sg->page, KM_IRQ0) +
+ pc->sg->offset;
+ drive->hwif->atapi_input_bytes(drive,
+ buf + pc->b_count, count);
+ kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = page_address(pc->sg->page) + pc->sg->offset;
+ drive->hwif->atapi_input_bytes(drive,
+ buf + pc->b_count, count);
+ }
+ bcount -= count; pc->b_count += count;
if (pc->b_count == pc->sg->length) {
pc->sg++;
pc->b_count = 0;
return;
}
count = min(pc->sg->length - pc->b_count, bcount);
- buf = kmap_atomic(pc->sg->page, KM_IRQ0);
- drive->hwif->atapi_output_bytes(drive,
- buf + pc->b_count + pc->sg->offset, count);
- kunmap_atomic(buf, KM_IRQ0);
- bcount -= count;
- pc->b_count += count;
+ if (PageHighMem(pc->sg->page)) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ buf = kmap_atomic(pc->sg->page, KM_IRQ0) +
+ pc->sg->offset;
+ drive->hwif->atapi_output_bytes(drive,
+ buf + pc->b_count, count);
+ kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = page_address(pc->sg->page) + pc->sg->offset;
+ drive->hwif->atapi_output_bytes(drive,
+ buf + pc->b_count, count);
+ }
+ bcount -= count; pc->b_count += count;
if (pc->b_count == pc->sg->length) {
pc->sg++;
pc->b_count = 0;
ata_exec_command_pio(ap, tf);
}
-/**
- * ata_exec - issue ATA command to host controller
- * @ap: port to which command is being issued
- * @tf: ATA taskfile register set
- *
- * Issues PIO/MMIO write to ATA command register, with proper
- * synchronization with interrupt handler / other threads.
- *
- * LOCKING:
- * Obtains host_set lock.
- */
-
-static inline void ata_exec(struct ata_port *ap, const struct ata_taskfile *tf)
-{
- unsigned long flags;
-
- DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->ops->exec_command(ap, tf);
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
-}
-
/**
* ata_tf_to_host - issue ATA taskfile to host controller
* @ap: port to which command is being issued
* other threads.
*
* LOCKING:
- * Obtains host_set lock.
- */
-
-static void ata_tf_to_host(struct ata_port *ap, const struct ata_taskfile *tf)
-{
- ap->ops->tf_load(ap, tf);
-
- ata_exec(ap, tf);
-}
-
-/**
- * ata_tf_to_host_nolock - issue ATA taskfile to host controller
- * @ap: port to which command is being issued
- * @tf: ATA taskfile register set
- *
- * Issues ATA taskfile register set to ATA host controller,
- * with proper synchronization with interrupt handler and
- * other threads.
- *
- * LOCKING:
* spin_lock_irqsave(host_set lock)
*/
-void ata_tf_to_host_nolock(struct ata_port *ap, const struct ata_taskfile *tf)
+static inline void ata_tf_to_host(struct ata_port *ap,
+ const struct ata_taskfile *tf)
{
ap->ops->tf_load(ap, tf);
ap->ops->exec_command(ap, tf);
*
* LOCKING:
* PCI/etc. bus probe sem.
+ * Obtains host_set lock.
*
*/
static unsigned int ata_bus_edd(struct ata_port *ap)
{
struct ata_taskfile tf;
+ unsigned long flags;
/* set up execute-device-diag (bus reset) taskfile */
/* also, take interrupts to a known state (disabled) */
tf.protocol = ATA_PROT_NODATA;
/* do bus reset */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
ata_tf_to_host(ap, &tf);
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
/* spec says at least 2ms. but who knows with those
* crazy ATAPI devices...
switch (qc->tf.protocol) {
case ATA_PROT_NODATA:
- ata_tf_to_host_nolock(ap, &qc->tf);
+ ata_tf_to_host(ap, &qc->tf);
break;
case ATA_PROT_DMA:
case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
ata_qc_set_polling(qc);
- ata_tf_to_host_nolock(ap, &qc->tf);
+ ata_tf_to_host(ap, &qc->tf);
ap->hsm_task_state = HSM_ST;
queue_work(ata_wq, &ap->pio_task);
break;
case ATA_PROT_ATAPI:
ata_qc_set_polling(qc);
- ata_tf_to_host_nolock(ap, &qc->tf);
+ ata_tf_to_host(ap, &qc->tf);
queue_work(ata_wq, &ap->packet_task);
break;
case ATA_PROT_ATAPI_NODATA:
ap->flags |= ATA_FLAG_NOINTR;
- ata_tf_to_host_nolock(ap, &qc->tf);
+ ata_tf_to_host(ap, &qc->tf);
queue_work(ata_wq, &ap->packet_task);
break;
host->unique_id = ata_unique_id++;
host->max_cmd_len = 12;
- scsi_assign_lock(host, &host_set->lock);
-
ap->flags = ATA_FLAG_PORT_DISABLED;
ap->id = host->unique_id;
ap->host = host;
#include <scsi/scsi.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
#include <linux/libata.h>
#include <linux/hdreg.h>
#include <asm/uaccess.h>
struct ata_port *ap;
struct ata_device *dev;
struct scsi_device *scsidev = cmd->device;
+ struct Scsi_Host *shost = scsidev->host;
- ap = (struct ata_port *) &scsidev->host->hostdata[0];
+ ap = (struct ata_port *) &shost->hostdata[0];
+
+ spin_unlock(shost->host_lock);
+ spin_lock(&ap->host_set->lock);
ata_scsi_dump_cdb(ap, cmd);
ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
out_unlock:
+ spin_unlock(&ap->host_set->lock);
+ spin_lock(shost->host_lock);
return 0;
}
extern int ata_check_atapi_dma(struct ata_queued_cmd *qc);
extern void ata_dev_select(struct ata_port *ap, unsigned int device,
unsigned int wait, unsigned int can_sleep);
-extern void ata_tf_to_host_nolock(struct ata_port *ap, const struct ata_taskfile *tf);
extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
#include <linux/sysrq.h>
#include <linux/mca.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_reg.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/sysrq.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
static void __exit imx_serial_exit(void)
{
uart_unregister_driver(&imx_reg);
+ driver_unregister(&serial_imx_driver);
}
module_init(imx_serial_init);
*/
#include <linux/config.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/tty.h>
#include <linux/serial.h>
* 4) AFAICT, hardware flow control isn't supported by the controller --MAG.
*/
+#include <linux/platform_device.h>
+
#include "mpsc.h"
/*
#include <linux/circ_buf.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/module.h>
#include <linux/ioport.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/sysrq.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/sysrq.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#endif
#include <linux/console.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/version.h>
-
+#include <linux/platform_device.h>
#include <linux/usb.h>
#include <linux/usb_gadget.h>
*
*/
+#include <linux/platform_device.h>
+
#include "lh7a40x_udc.h"
//#define DEBUG printk
#include <linux/proc_fs.h>
#include <linux/mm.h>
#include <linux/moduleparam.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/usb_ch9.h>
#include <linux/usb_gadget.h>
#include <linux/usb_otg.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/mm.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <asm/byteorder.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/usb_isp116x.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/irq.h>
* This file is licenced under the GPL.
*/
+#include <linux/platform_device.h>
+
#include <asm/mach-au1x00/au1000.h>
#define USBH_ENABLE_BE (1<<0)
* This file is licenced under the GPL.
*/
+#include <linux/platform_device.h>
+
#include <asm/hardware.h>
#include <linux/signal.h> /* SA_INTERRUPT */
#include <linux/jiffies.h>
+#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/io.h>
* This file is licenced under the GPL.
*/
+#include <linux/platform_device.h>
+
/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */
#include <linux/device.h>
#include <linux/signal.h>
+#include <linux/platform_device.h>
+
#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <asm/arch/pxa-regs.h>
* This file is licenced under the GPL.
*/
+#include <linux/platform_device.h>
+
#include <asm/hardware.h>
#include <asm/hardware/clock.h>
#include <asm/arch/usb-control.h>
}
EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc);
+static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask)
+{
+ u16 cmd;
+ return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask);
+}
+
+#define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO)
+#define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY)
+
static void __devinit quirk_usb_handoff_uhci(struct pci_dev *pdev)
{
unsigned long base = 0;
int i;
+ if (!pio_enabled(pdev))
+ return;
+
for (i = 0; i < PCI_ROM_RESOURCE; i++)
if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
base = pci_resource_start(pdev, i);
uhci_check_and_reset_hc(pdev, base);
}
+static int __devinit mmio_resource_enabled(struct pci_dev *pdev, int idx)
+{
+ return pci_resource_start(pdev, idx) && mmio_enabled(pdev);
+}
+
static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev)
{
void __iomem *base;
int wait_time;
u32 control;
+ if (!mmio_resource_enabled(pdev, 0))
+ return;
+
base = ioremap_nocache(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (base == NULL) return;
u32 hcc_params, val, temp;
u8 cap_length;
+ if (!mmio_resource_enabled(pdev, 0))
+ return;
+
base = ioremap_nocache(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (base == NULL) return;
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/usb_sl811.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
+#include <linux/platform_device.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/fb.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <asm/hardware.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/arcfb.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/ioport.h>
+#include <linux/platform_device.h>
+
#include <asm/types.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/config.h>
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <asm/hardware.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <asm/hardware.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <asm/setup.h>
#include <linux/config.h>
#include <linux/module.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/wait.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <asm/hardware.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/ioport.h>
+#include <linux/platform_device.h>
+
#include <asm/io.h>
#include <asm/mtrr.h>
#include <linux/fb.h>
#include <linux/ioport.h>
#include <linux/init.h>
+#include <linux/platform_device.h>
+
#include <video/vga.h>
#include <asm/io.h>
#include <asm/mtrr.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
#include <asm/uaccess.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <asm/io.h>
Jesper Juhl (in particular for lots of whitespace/formatting cleanup)
Vince Negri and Dave Stahl (for finding an important caching bug)
Adrian Bunk (kcalloc cleanups)
+Miklos Szeredi
+Kazeon team for various fixes especially for 2.4 version.
+Asser Ferno (Change Notify support)
+Shaggy (Dave Kleikamp) for inumerable small fs suggestions and some good cleanup
Test case and Bug Report contributors
-------------------------------------
+Version 1.39
+------------
+Defer close of a file handle slightly if pending writes depend on that file handle
+(this reduces the EBADF bad file handle errors that can be logged under heavy
+stress on writes).
+
+Version 1.38
+------------
+Fix tcp socket retransmission timeouts (e.g. on ENOSPACE from the socket)
+to be smaller at first (but increasing) so large write performance performance
+over GigE is better. Do not hang thread on illegal byte range lock response
+from Windows (Windows can send an RFC1001 size which does not match smb size) by
+allowing an SMBs TCP length to be up to a few bytes longer than it should be.
+wsize and rsize can now be larger than negotiated buffer size if server
+supports large readx/writex, even when directio mount flag not specified.
+Write size will in many cases now be 16K instead of 4K which greatly helps
+file copy performance on lightly loaded networks. Fix oops in dnotify
+when experimental config flag enabled. Make cifsFYI more granular.
+
+Version 1.37
+------------
+Fix readdir caching when unlink removes file in current search buffer,
+and this is followed by a rewind search to just before the deleted entry.
+Do not attempt to set ctime unless atime and/or mtime change requested
+(most servers throw it away anyway). Fix length check of received smbs
+to be more accurate. Fix big endian problem with mapchars mount option,
+and with a field returned by statfs.
+
+Version 1.36
+------------
+Add support for mounting to older pre-CIFS servers such as Windows9x and ME.
+For these older servers, add option for passing netbios name of server in
+on mount (servernetbiosname). Add suspend support for power management, to
+avoid cifsd thread preventing software suspend from working.
+Add mount option for disabling the default behavior of sending byte range lock
+requests to the server (necessary for certain applications which break with
+mandatory lock behavior such as Evolution), and also mount option for
+requesting case insensitive matching for path based requests (requesting
+case sensitive is the default).
+
Version 1.35
------------
Add writepage performance improvements. Fix path name conversions
for long filenames on mounts which were done with "mapchars" mount option
-specified.
+specified. Ensure multiplex ids do not collide. Fix case in which
+rmmod can oops if done soon after last unmount. Fix truncated
+search (readdir) output when resume filename was a long filename.
+Fix filename conversion when mapchars mount option was specified and
+filename was a long filename.
Version 1.34
------------
kills the cifsd thread (NB: killing the cifs kernel threads is not
recommended, unmount and rmmod cifs will kill them when they are
no longer needed). Fix readdir to ASCII servers (ie older servers
-which do not support Unicode) and also require asterik.
+which do not support Unicode) and also require asterisk.
Fix out of memory case in which data could be written one page
off in the page cache.
Version 1.25
------------
-Fix internationlization problem in cifs readdir with filenames that map to
+Fix internationalization problem in cifs readdir with filenames that map to
longer UTF8 strings than the string on the wire was in Unicode. Add workaround
for readdir to netapp servers. Fix search rewind (seek into readdir to return
non-consecutive entries). Do not do readdir when server negotiates
page cache could contain stale data, and write through did
not occur often enough while file was still open when read ahead
(read oplock) not allowed. Treat "sep=" when first mount option
-as an overrride of comma as the default separator between mount
+as an override of comma as the default separator between mount
options.
Version 1.01
Version 1.00
------------
Gracefully clean up failed mounts when attempting to mount to servers such as
-Windows 98 that terminate tcp sessions during prototocol negotiation. Handle
+Windows 98 that terminate tcp sessions during protocol negotiation. Handle
embedded commas in mount parsing of passwords.
Version 0.99
instance is closed so that the client does not continue using stale local
copy rather than later modified server copy of file. Do not reconnect
when server drops the tcp session prematurely before negotiate
-protocol response. Fix oops in roepen_file when dentry freed. Allow
+protocol response. Fix oops in reopen_file when dentry freed. Allow
the support for CIFS Unix Extensions to be disabled via proc interface.
Version 0.98
Version 0.41
------------
Various minor fixes for Connectathon Posix "basic" file i/o test suite. Directory caching fixed so hardlinked
-files now return the correct rumber of links on fstat as they are repeatedly linked and unlinked.
+files now return the correct number of links on fstat as they are repeatedly linked and unlinked.
Version 0.40
------------
and cleaned them up and made them more consistent with other cifs functions.
7) Server support for Unix extensions is now fully detected and FindFirst is implemented both ways
-(with or without Unix exentions) but FindNext and QueryPathInfo with the Unix extensions are not completed,
+(with or without Unix extensions) but FindNext and QueryPathInfo with the Unix extensions are not completed,
nor is the symlink support using the Unix extensions
8) Started adding the readlink and follow_link code
during the local client kernel build will be used.
If server does not support Unicode, this parameter is
unused.
- rsize default read size
- wsize default write size
+ rsize default read size (usually 16K)
+ wsize default write size (usually 16K, 32K is often better over GigE)
+ maximum wsize currently allowed by CIFS is 57344 (14 4096 byte
+ pages)
rw mount the network share read-write (note that the
server may still consider the share read-only)
ro mount network share read-only
This has no effect if the server does not support
Unicode on the wire.
nomapchars Do not translate any of these seven characters (default).
+ nocase Request case insensitive path name matching (case
+ sensitive is the default if the server suports it).
+ nobrl Do not send byte range lock requests to the server.
+ This is necessary for certain applications that break
+ with cifs style mandatory byte range locks (and most
+ cifs servers do not yet support requesting advisory
+ byte range locks).
remount remount the share (often used to change from ro to rw mounts
or vice versa)
kernel, e.g. insmod cifs). To enable a feature set it to 1 e.g. to enable
tracing to the kernel message log type:
- echo 1 > /proc/fs/cifs/cifsFYI
+ echo 7 > /proc/fs/cifs/cifsFYI
-and for more extensive tracing including the start of smb requests and responses
+cifsFYI functions as a bit mask. Setting it to 1 enables additional kernel
+logging of various informational messages. 2 enables logging of non-zero
+SMB return codes while 4 enables logging of requests that take longer
+than one second to complete (except for byte range lock requests).
+Setting it to 4 requires defining CONFIG_CIFS_STATS2 manually in the
+source code (typically by setting it in the beginning of cifsglob.h),
+and setting it to seven enables all three. Finally, tracing
+the start of smb requests and responses can be enabled via:
echo 1 > /proc/fs/cifs/traceSMB
-version 1.34 April 29, 2005
+version 1.37 October 9, 2005
A Partial List of Missing Features
==================================
for visible, important contributions to this module. Here
is a partial list of the known problems and missing features:
-a) Support for SecurityDescriptors for chmod/chgrp/chown so
-these can be supported for Windows servers
+a) Support for SecurityDescriptors(Windows/CIFS ACLs) for chmod/chgrp/chown
+so that these operations can be supported to Windows servers
-b) Better pam/winbind integration (e.g. to handle uid mapping
-better)
+b) Mapping POSIX ACLs (and eventually NFSv4 ACLs) to CIFS
+SecurityDescriptors
-c) multi-user mounts - multiplexed sessionsetups over single vc
-(ie tcp session) - more testing needed
+c) Better pam/winbind integration (e.g. to handle uid mapping
+better)
d) Kerberos/SPNEGO session setup support - (started)
using FindNotify or equivalent. - (started)
g) A few byte range testcases fail due to POSIX vs. Windows/CIFS
-style byte range lock differences
+style byte range lock differences. Save byte range locks so
+reconnect can replay them.
-h) quota support
+h) Support unlock all (unlock 0,MAX_OFFSET)
+by unlocking all known byte range locks that we locked on the file.
-j) finish writepages support (multi-page write behind for improved
-performance) and syncpage
+i) quota support (needs minor kernel change since quota calls
+to make it to network filesystems or deviceless filesystems)
+
+j) investigate sync behavior (including syncpage) and check
+for proper behavior of intr/nointr
k) hook lower into the sockets api (as NFS/SunRPC does) to avoid the
extra copy in/out of the socket buffers in some cases.
in the Extended Attribute format their SFU clients would recognize.
q) Finish fcntl D_NOTIFY support so kde and gnome file list windows
-will autorefresh (started)
+will autorefresh (partially complete by Asser). Needs minor kernel
+vfs change to support removing D_NOTIFY on a file.
r) Add GUI tool to configure /proc/fs/cifs settings and for display of
the CIFS statistics (started)
-q) implement support for security and trusted categories of xattrs
+s) implement support for security and trusted categories of xattrs
(requires minor protocol extension) to enable better support for SELINUX
-r) Implement O_DIRECT flag on open (already supported on mount)
-
-s) Allow remapping of last remaining character (\) to +0xF000 which
-(this character is valid for POSIX but not for Windows)
+t) Implement O_DIRECT flag on open (already supported on mount)
-t) Create UID mapping facility so server UIDs can be mapped on a per
+u) Create UID mapping facility so server UIDs can be mapped on a per
mount or a per server basis to client UIDs or nobody if no mapping
exists. This is helpful when Unix extensions are negotiated to
allow better permission checking when UIDs differ on the server
standard for asking the server for the corresponding name of a
particular uid.
+v) Add support for CIFS Unix and also the newer POSIX extensions to the
+server side for Samba 4.
+
+w) Finish up the dos time conversion routines needed to return old server
+time to the client (default time, of now or time 0 is used now for these
+very old servers)
+
+x) Add support for OS/2 (LANMAN 1.2 and LANMAN2.1 based SMB servers)
+
+y) Finish testing of Windows 9x/Windows ME server support (started).
+
KNOWN BUGS (updated April 29, 2005)
====================================
See http://bugzilla.samba.org - search on product "CifsVFS" for
unsigned char **eoc,
unsigned int *cls, unsigned int *con, unsigned int *tag)
{
- unsigned int def, len;
+ unsigned int def = 0;
+ unsigned int len = 0;
if (!asn1_id_decode(ctx, cls, con, tag))
return 0;
buf += length;
length = sprintf(buf,"CIFS Version %s\n",CIFS_VERSION);
buf += length;
+ length = sprintf(buf,"Active VFS Requests: %d\n", GlobalTotalActiveXid);
+ buf += length;
length = sprintf(buf, "Servers:");
buf += length;
} else {
length =
sprintf(buf,
- "\n%d) Name: %s Domain: %s Mounts: %d ServerOS: %s \n\tServerNOS: %s\tCapabilities: 0x%x\n\tSMB session status: %d\t",
+ "\n%d) Name: %s Domain: %s Mounts: %d OS: %s \n\tNOS: %s\tCapability: 0x%x\n\tSMB session status: %d\t",
i, ses->serverName, ses->serverDomain,
atomic_read(&ses->inUse),
ses->serverOS, ses->serverNOS,
buf += length;
}
if(ses->server) {
- buf += sprintf(buf, "TCP status: %d\n\tLocal Users To Server: %d SecMode: 0x%x Req Active: %d",
+ buf += sprintf(buf, "TCP status: %d\n\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d",
ses->server->tcpStatus,
atomic_read(&ses->server->socketUseCount),
ses->server->secMode,
atomic_read(&ses->server->inFlight));
-
+
+#ifdef CONFIG_CIFS_STATS2
+ buf += sprintf(buf, " In Send: %d In MaxReq Wait: %d",
+ atomic_read(&ses->server->inSend),
+ atomic_read(&ses->server->num_waiters));
+#endif
+
length = sprintf(buf, "\nMIDs:\n");
buf += length;
dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
length =
sprintf(buf,
- "\n%d) %s Uses: %d Type: %s Characteristics: 0x%x Attributes: 0x%x\nPathComponentMax: %d Status: %d",
+ "\n%d) %s Uses: %d Type: %s DevInfo: 0x%x Attributes: 0x%x\nPathComponentMax: %d Status: %d",
i, tcon->treeName,
atomic_read(&tcon->useCount),
tcon->nativeFileSystem,
}
#ifdef CONFIG_CIFS_STATS
+
+static int
+cifs_stats_write(struct file *file, const char __user *buffer,
+ unsigned long count, void *data)
+{
+ char c;
+ int rc;
+ struct list_head *tmp;
+ struct cifsTconInfo *tcon;
+
+ rc = get_user(c, buffer);
+ if (rc)
+ return rc;
+
+ if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
+ read_lock(&GlobalSMBSeslock);
+ list_for_each(tmp, &GlobalTreeConnectionList) {
+ tcon = list_entry(tmp, struct cifsTconInfo,
+ cifsConnectionList);
+ atomic_set(&tcon->num_smbs_sent, 0);
+ atomic_set(&tcon->num_writes, 0);
+ atomic_set(&tcon->num_reads, 0);
+ atomic_set(&tcon->num_oplock_brks, 0);
+ atomic_set(&tcon->num_opens, 0);
+ atomic_set(&tcon->num_closes, 0);
+ atomic_set(&tcon->num_deletes, 0);
+ atomic_set(&tcon->num_mkdirs, 0);
+ atomic_set(&tcon->num_rmdirs, 0);
+ atomic_set(&tcon->num_renames, 0);
+ atomic_set(&tcon->num_t2renames, 0);
+ atomic_set(&tcon->num_ffirst, 0);
+ atomic_set(&tcon->num_fnext, 0);
+ atomic_set(&tcon->num_fclose, 0);
+ atomic_set(&tcon->num_hardlinks, 0);
+ atomic_set(&tcon->num_symlinks, 0);
+ atomic_set(&tcon->num_locks, 0);
+ }
+ read_unlock(&GlobalSMBSeslock);
+ }
+
+ return count;
+}
+
static int
cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
int count, int *eof, void *data)
buf += sprintf(buf, "\tDISCONNECTED ");
length += 14;
}
- item_length = sprintf(buf,"\nSMBs: %d Oplock Breaks: %d",
+ item_length = sprintf(buf, "\nSMBs: %d Oplock Breaks: %d",
atomic_read(&tcon->num_smbs_sent),
atomic_read(&tcon->num_oplock_brks));
buf += item_length;
length += item_length;
- item_length = sprintf(buf,"\nReads: %d Bytes %lld",
+ item_length = sprintf(buf, "\nReads: %d Bytes: %lld",
atomic_read(&tcon->num_reads),
(long long)(tcon->bytes_read));
buf += item_length;
length += item_length;
- item_length = sprintf(buf,"\nWrites: %d Bytes: %lld",
+ item_length = sprintf(buf, "\nWrites: %d Bytes: %lld",
atomic_read(&tcon->num_writes),
(long long)(tcon->bytes_written));
+ buf += item_length;
+ length += item_length;
+ item_length = sprintf(buf,
+ "\nLocks: %d HardLinks: %d Symlinks: %d",
+ atomic_read(&tcon->num_locks),
+ atomic_read(&tcon->num_hardlinks),
+ atomic_read(&tcon->num_symlinks));
+ buf += item_length;
+ length += item_length;
+
+ item_length = sprintf(buf, "\nOpens: %d Closes: %d Deletes: %d",
+ atomic_read(&tcon->num_opens),
+ atomic_read(&tcon->num_closes),
+ atomic_read(&tcon->num_deletes));
buf += item_length;
length += item_length;
- item_length = sprintf(buf,
- "\nOpens: %d Deletes: %d\nMkdirs: %d Rmdirs: %d",
- atomic_read(&tcon->num_opens),
- atomic_read(&tcon->num_deletes),
+ item_length = sprintf(buf, "\nMkdirs: %d Rmdirs: %d",
atomic_read(&tcon->num_mkdirs),
atomic_read(&tcon->num_rmdirs));
buf += item_length;
length += item_length;
- item_length = sprintf(buf,
- "\nRenames: %d T2 Renames %d",
+ item_length = sprintf(buf, "\nRenames: %d T2 Renames %d",
atomic_read(&tcon->num_renames),
atomic_read(&tcon->num_t2renames));
buf += item_length;
length += item_length;
+ item_length = sprintf(buf, "\nFindFirst: %d FNext %d FClose %d",
+ atomic_read(&tcon->num_ffirst),
+ atomic_read(&tcon->num_fnext),
+ atomic_read(&tcon->num_fclose));
+ buf += item_length;
+ length += item_length;
}
read_unlock(&GlobalSMBSeslock);
cifs_debug_data_read, NULL);
#ifdef CONFIG_CIFS_STATS
- create_proc_read_entry("Stats", 0, proc_fs_cifs,
+ pde = create_proc_read_entry("Stats", 0, proc_fs_cifs,
cifs_stats_read, NULL);
+ if (pde)
+ pde->write_proc = cifs_stats_write;
#endif
pde = create_proc_read_entry("cifsFYI", 0, proc_fs_cifs,
cifsFYI_read, NULL);
if (pde)
pde->write_proc = oplockEnabled_write;
- pde = create_proc_read_entry("ReenableOldCifsReaddirCode", 0, proc_fs_cifs,
+ pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
quotaEnabled_read, NULL);
if (pde)
pde->write_proc = quotaEnabled_write;
remove_proc_entry("ExtendedSecurity",proc_fs_cifs);
remove_proc_entry("PacketSigningEnabled",proc_fs_cifs);
remove_proc_entry("LinuxExtensionsEnabled",proc_fs_cifs);
- remove_proc_entry("ReenableOldCifsReaddirCode",proc_fs_cifs);
+ remove_proc_entry("Experimental",proc_fs_cifs);
remove_proc_entry("LookupCacheEnabled",proc_fs_cifs);
remove_proc_entry("cifs", proc_root_fs);
}
cifsFYI = 0;
else if (c == '1' || c == 'y' || c == 'Y')
cifsFYI = 1;
+ else if((c > '1') && (c <= '9'))
+ cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
return count;
}
void cifs_dump_mem(char *label, void *data, int length);
extern int traceSMB; /* flag which enables the function below */
void dump_smb(struct smb_hdr *, int);
+#define CIFS_INFO 0x01
+#define CIFS_RC 0x02
+#define CIFS_TIMER 0x04
/*
* debug ON
/* information message: e.g., configuration, major event */
extern int cifsFYI;
-#define cifsfyi(format,arg...) if (cifsFYI) printk(KERN_DEBUG " " __FILE__ ": " format "\n" "" , ## arg)
+#define cifsfyi(format,arg...) if (cifsFYI & CIFS_INFO) printk(KERN_DEBUG " " __FILE__ ": " format "\n" "" , ## arg)
#define cFYI(button,prspec) if (button) cifsfyi prspec
#define CIFS_MOUNT_DIRECT_IO 8 /* do not write nor read through page cache */
#define CIFS_MOUNT_NO_XATTR 0x10 /* if set - disable xattr support */
#define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames */
+#define CIFS_MOUNT_POSIX_PATHS 0x40 /* Negotiate posix pathnames if possible. */
+#define CIFS_MOUNT_UNX_EMUL 0x80 /* Network compat with SFUnix emulation */
+#define CIFS_MOUNT_NO_BRL 0x100 /* No sending byte range locks to srv */
struct cifs_sb_info {
struct cifsTconInfo *tcon; /* primary mount */
unsigned int sign_CIFS_PDUs = 1;
extern struct task_struct * oplockThread; /* remove sparse warning */
struct task_struct * oplockThread = NULL;
+extern struct task_struct * dnotifyThread; /* remove sparse warning */
+struct task_struct * dnotifyThread = NULL;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
module_param(CIFSMaxBufSize, int, 0);
MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048");
MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256");
static DECLARE_COMPLETION(cifs_oplock_exited);
+static DECLARE_COMPLETION(cifs_dnotify_exited);
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
#endif /* CIFS_EXPERIMENTAL */
rc = CIFSSMBQFSInfo(xid, pTcon, buf);
+ /* Old Windows servers do not support level 103, retry with level
+ one if old server failed the previous call */
+ if(rc)
+ rc = SMBOldQFSInfo(xid, pTcon, buf);
/*
int f_type;
__fsid_t f_fsid;
cifs_inode->clientCanCacheAll = FALSE;
cifs_inode->vfs_inode.i_blksize = CIFS_MAX_MSGSIZE;
cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
-
+ cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;
INIT_LIST_HEAD(&cifs_inode->openFileList);
return &cifs_inode->vfs_inode;
}
};
#endif
+static void cifs_umount_begin(struct super_block * sblock)
+{
+ struct cifs_sb_info *cifs_sb;
+ struct cifsTconInfo * tcon;
+
+ cifs_sb = CIFS_SB(sblock);
+ if(cifs_sb == NULL)
+ return;
+
+ tcon = cifs_sb->tcon;
+ if(tcon == NULL)
+ return;
+ down(&tcon->tconSem);
+ if (atomic_read(&tcon->useCount) == 1)
+ tcon->tidStatus = CifsExiting;
+ up(&tcon->tconSem);
+
+ if(tcon->ses && tcon->ses->server)
+ {
+ cERROR(1,("wake up tasks now - umount begin not complete"));
+ wake_up_all(&tcon->ses->server->request_q);
+ }
+/* BB FIXME - finish add checks for tidStatus BB */
+
+ return;
+}
+
+
static int cifs_remount(struct super_block *sb, int *flags, char *data)
{
*flags |= MS_NODIRATIME;
unless later we add lazy close of inodes or unless the kernel forgets to call
us with the same number of releases (closes) as opens */
.show_options = cifs_show_options,
-/* .umount_begin = cifs_umount_begin, *//* consider adding in the future */
+/* .umount_begin = cifs_umount_begin, */ /* BB finish in the future */
.remount_fs = cifs_remount,
};
do {
if (try_to_freeze())
continue;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(1*HZ);
spin_lock(&GlobalMid_Lock);
if(list_empty(&GlobalOplock_Q)) {
spin_unlock(&GlobalMid_Lock);
}
} else
spin_unlock(&GlobalMid_Lock);
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(1); /* yield in case q were corrupt */
}
} while(!signal_pending(current));
- complete_and_exit (&cifs_oplock_exited, 0);
oplockThread = NULL;
+ complete_and_exit (&cifs_oplock_exited, 0);
+}
+
+static int cifs_dnotify_thread(void * dummyarg)
+{
+ daemonize("cifsdnotifyd");
+ allow_signal(SIGTERM);
+
+ dnotifyThread = current;
+ do {
+ if(try_to_freeze())
+ continue;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(39*HZ);
+ } while(!signal_pending(current));
+ complete_and_exit (&cifs_dnotify_exited, 0);
}
static int __init
INIT_LIST_HEAD(&GlobalSMBSessionList);
INIT_LIST_HEAD(&GlobalTreeConnectionList);
INIT_LIST_HEAD(&GlobalOplock_Q);
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ INIT_LIST_HEAD(&GlobalDnotifyReqList);
+ INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
+#endif
/*
* Initialize Global counters
*/
if (!rc) {
rc = (int)kernel_thread(cifs_oplock_thread, NULL,
CLONE_FS | CLONE_FILES | CLONE_VM);
- if(rc > 0)
- return 0;
- else
+ if(rc > 0) {
+ rc = (int)kernel_thread(cifs_dnotify_thread, NULL,
+ CLONE_FS | CLONE_FILES | CLONE_VM);
+ if(rc > 0)
+ return 0;
+ else
+ cERROR(1,("error %d create dnotify thread", rc));
+ } else {
cERROR(1,("error %d create oplock thread",rc));
+ }
}
cifs_destroy_request_bufs();
}
send_sig(SIGTERM, oplockThread, 1);
wait_for_completion(&cifs_oplock_exited);
}
+ if(dnotifyThread) {
+ send_sig(SIGTERM, dnotifyThread, 1);
+ wait_for_completion(&cifs_dnotify_exited);
+ }
}
MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
/* Functions related to dir entries */
extern struct dentry_operations cifs_dentry_ops;
+extern struct dentry_operations cifs_ci_dentry_ops;
/* Functions related to symlinks */
extern void *cifs_follow_link(struct dentry *direntry, struct nameidata *nd);
extern ssize_t cifs_listxattr(struct dentry *, char *, size_t);
extern int cifs_ioctl (struct inode * inode, struct file * filep,
unsigned int command, unsigned long arg);
-#define CIFS_VERSION "1.35"
+#define CIFS_VERSION "1.39"
#endif /* _CIFSFS_H */
*/
struct TCP_Server_Info {
- char server_Name[SERVER_NAME_LEN_WITH_NULL]; /* 15 chars + X'20'in 16th */
- char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2]; /* Unicode version of server_Name */
+ /* 15 character server name + 0x20 16th byte indicating type = srv */
+ char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
+ char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2];
struct socket *ssocket;
union {
struct sockaddr_in sockAddr;
struct list_head pending_mid_q;
void *Server_NlsInfo; /* BB - placeholder for future NLS info */
unsigned short server_codepage; /* codepage for the server */
- unsigned long ip_address; /* IP addr for the server if known */
+ unsigned long ip_address; /* IP addr for the server if known */
enum protocolEnum protocolType;
char versionMajor;
char versionMinor;
unsigned svlocal:1; /* local server or remote */
atomic_t socketUseCount; /* number of open cifs sessions on socket */
atomic_t inFlight; /* number of requests on the wire to server */
+#ifdef CONFIG_CIFS_STATS2
+ atomic_t inSend; /* requests trying to send */
+ atomic_t num_waiters; /* blocked waiting to get in sendrecv */
+#endif
enum statusEnum tcpStatus; /* what we think the status is */
struct semaphore tcpSem;
struct task_struct *tsk;
/* (returned on Negotiate */
int capabilities; /* allow selective disabling of caps by smb sess */
__u16 timeZone;
+ __u16 CurrentMid; /* multiplex id - rotating counter */
char cryptKey[CIFS_CRYPTO_KEY_SIZE];
- char workstation_RFC1001_name[16]; /* 16th byte is always zero */
+ /* 16th byte of RFC1001 workstation name is always null */
+ char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
__u32 sequence_number; /* needed for CIFS PDU signature */
char mac_signing_key[CIFS_SESSION_KEY_SIZE + 16];
};
atomic_t num_reads;
atomic_t num_oplock_brks;
atomic_t num_opens;
+ atomic_t num_closes;
atomic_t num_deletes;
atomic_t num_mkdirs;
atomic_t num_rmdirs;
atomic_t num_renames;
atomic_t num_t2renames;
+ atomic_t num_ffirst;
+ atomic_t num_fnext;
+ atomic_t num_fclose;
+ atomic_t num_hardlinks;
+ atomic_t num_symlinks;
+ atomic_t num_locks;
+#ifdef CONFIG_CIFS_STATS2
+ unsigned long long time_writes;
+ unsigned long long time_reads;
+ unsigned long long time_opens;
+ unsigned long long time_deletes;
+ unsigned long long time_closes;
+ unsigned long long time_mkdirs;
+ unsigned long long time_rmdirs;
+ unsigned long long time_renames;
+ unsigned long long time_t2renames;
+ unsigned long long time_ffirst;
+ unsigned long long time_fnext;
+ unsigned long long time_fclose;
+#endif /* CONFIG_CIFS_STATS2 */
__u64 bytes_read;
__u64 bytes_written;
spinlock_t stat_lock;
-#endif
+#endif /* CONFIG_CIFS_STATS */
FILE_SYSTEM_DEVICE_INFO fsDevInfo;
FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if file system name truncated */
FILE_SYSTEM_UNIX_INFO fsUnixInfo;
unsigned retry:1;
+ unsigned nocase:1;
/* BB add field for back pointer to sb struct? */
};
struct inode * pInode; /* needed for oplock break */
unsigned closePend:1; /* file is marked to close */
unsigned invalidHandle:1; /* file closed via session abend */
+ atomic_t wrtPending; /* handle in use - defer close */
struct semaphore fh_sem; /* prevents reopen race after dead ses*/
char * search_resume_name; /* BB removeme BB */
unsigned int resume_name_length; /* BB removeme - field renamed and moved BB */
return sb->s_fs_info;
}
+static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
+{
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
+ return '/';
+ else
+ return '\\';
+}
+
+#ifdef CONFIG_CIFS_STATS
+#define cifs_stats_inc atomic_inc
+
+static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
+ unsigned int bytes)
+{
+ if (bytes) {
+ spin_lock(&tcon->stat_lock);
+ tcon->bytes_written += bytes;
+ spin_unlock(&tcon->stat_lock);
+ }
+}
+
+static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
+ unsigned int bytes)
+{
+ spin_lock(&tcon->stat_lock);
+ tcon->bytes_read += bytes;
+ spin_unlock(&tcon->stat_lock);
+}
+#else
+
+#define cifs_stats_inc(field) do {} while(0)
+#define cifs_stats_bytes_written(tcon, bytes) do {} while(0)
+#define cifs_stats_bytes_read(tcon, bytes) do {} while(0)
+
+#endif
/* one of these for every pending CIFS request to the server */
struct mid_q_entry {
__u16 mid; /* multiplex id */
__u16 pid; /* process id */
__u32 sequence_number; /* for CIFS signing */
- struct timeval when_sent; /* time when smb sent */
+ unsigned long when_alloc; /* when mid was created */
+#ifdef CONFIG_CIFS_STATS2
+ unsigned long when_sent; /* time when smb send finished */
+ unsigned long when_received; /* when demux complete (taken off wire) */
+#endif
struct cifsSesInfo *ses; /* smb was sent to this server */
struct task_struct *tsk; /* task waiting for response */
struct smb_hdr *resp_buf; /* response buffer */
__u16 netfid;
};
+/* for pending dnotify requests */
+struct dir_notify_req {
+ struct list_head lhead;
+ __le16 Pid;
+ __le16 PidHigh;
+ __u16 Mid;
+ __u16 Tid;
+ __u16 Uid;
+ __u16 netfid;
+ __u32 filter; /* CompletionFilter (for multishot) */
+ int multishot;
+ struct file * pfile;
+};
+
#define MID_FREE 0
#define MID_REQUEST_ALLOCATED 1
#define MID_REQUEST_SUBMITTED 2
GLOBAL_EXTERN struct list_head GlobalOplock_Q;
+GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; /* Outstanding dir notify requests */
+GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q; /* Dir notify response queue */
+
/*
* Global transaction id (XID) information
*/
#define SMB_COM_CLOSE 0x04 /* triv req/rsp, timestamp ignored */
#define SMB_COM_DELETE 0x06 /* trivial response */
#define SMB_COM_RENAME 0x07 /* trivial response */
+#define SMB_COM_QUERY_INFORMATION 0x08 /* aka getattr */
#define SMB_COM_SETATTR 0x09 /* trivial response */
#define SMB_COM_LOCKING_ANDX 0x24 /* trivial response */
#define SMB_COM_COPY 0x29 /* trivial rsp, fail filename ignrd*/
+#define SMB_COM_OPEN_ANDX 0x2D /* Legacy open for old servers */
#define SMB_COM_READ_ANDX 0x2E
#define SMB_COM_WRITE_ANDX 0x2F
#define SMB_COM_TRANSACTION2 0x32
#define SMB_COM_NT_TRANSACT 0xA0
#define SMB_COM_NT_TRANSACT_SECONDARY 0xA1
#define SMB_COM_NT_CREATE_ANDX 0xA2
+#define SMB_COM_NT_CANCEL 0xA4 /* no response */
#define SMB_COM_NT_RENAME 0xA5 /* trivial response */
/* Transact2 subcommand codes */
#define TRANS2_FIND_FIRST 0x01
#define TRANS2_FIND_NEXT 0x02
#define TRANS2_QUERY_FS_INFORMATION 0x03
+#define TRANS2_SET_FS_INFORMATION 0x04
#define TRANS2_QUERY_PATH_INFORMATION 0x05
#define TRANS2_SET_PATH_INFORMATION 0x06
#define TRANS2_QUERY_FILE_INFORMATION 0x07
#define NT_TRANSACT_GET_USER_QUOTA 0x07
#define NT_TRANSACT_SET_USER_QUOTA 0x08
-#define MAX_CIFS_HDR_SIZE 256 /* chained NTCreateXReadX will probably be biggest */
+#define MAX_CIFS_HDR_SIZE 256 /* is future chained NTCreateXReadX bigger? */
/* internal cifs vfs structures */
/*****************************************************************
/*
* SMB flag definitions
*/
-#define SMBFLG_EXTD_LOCK 0x01 /* server supports lock-read write-unlock primitives */
+#define SMBFLG_EXTD_LOCK 0x01 /* server supports lock-read write-unlock smb */
#define SMBFLG_RCV_POSTED 0x02 /* obsolete */
#define SMBFLG_RSVD 0x04
-#define SMBFLG_CASELESS 0x08 /* all pathnames treated as caseless (off implies case sensitive file handling requested) */
+#define SMBFLG_CASELESS 0x08 /* all pathnames treated as caseless (off
+ implies case sensitive file handling request) */
#define SMBFLG_CANONICAL_PATH_FORMAT 0x10 /* obsolete */
#define SMBFLG_OLD_OPLOCK 0x20 /* obsolete */
#define SMBFLG_OLD_OPLOCK_NOTIFY 0x40 /* obsolete */
/*
* SMB flag2 definitions
*/
-#define SMBFLG2_KNOWS_LONG_NAMES cpu_to_le16(1) /* can send long (non-8.3) path names in response */
+#define SMBFLG2_KNOWS_LONG_NAMES cpu_to_le16(1) /* can send long (non-8.3)
+ path names in response */
#define SMBFLG2_KNOWS_EAS cpu_to_le16(2)
#define SMBFLG2_SECURITY_SIGNATURE cpu_to_le16(4)
#define SMBFLG2_IS_LONG_NAME cpu_to_le16(0x40)
* file and can have any suitable combination of the following values:
*/
-#define FILE_READ_DATA 0x00000001 /* Data can be read from the file */
-#define FILE_WRITE_DATA 0x00000002 /* Data can be written to the file */
-#define FILE_APPEND_DATA 0x00000004 /* Data can be appended to the file */
-#define FILE_READ_EA 0x00000008 /* Extended attributes associated */
- /* with the file can be read */
-#define FILE_WRITE_EA 0x00000010 /* Extended attributes associated */
- /* with the file can be written */
-#define FILE_EXECUTE 0x00000020 /*Data can be read into memory from */
- /* the file using system paging I/O */
+#define FILE_READ_DATA 0x00000001 /* Data can be read from the file */
+#define FILE_WRITE_DATA 0x00000002 /* Data can be written to the file */
+#define FILE_APPEND_DATA 0x00000004 /* Data can be appended to the file */
+#define FILE_READ_EA 0x00000008 /* Extended attributes associated */
+ /* with the file can be read */
+#define FILE_WRITE_EA 0x00000010 /* Extended attributes associated */
+ /* with the file can be written */
+#define FILE_EXECUTE 0x00000020 /*Data can be read into memory from */
+ /* the file using system paging I/O */
#define FILE_DELETE_CHILD 0x00000040
-#define FILE_READ_ATTRIBUTES 0x00000080 /* Attributes associated with the */
- /* file can be read */
-#define FILE_WRITE_ATTRIBUTES 0x00000100 /* Attributes associated with the */
- /* file can be written */
-#define DELETE 0x00010000 /* The file can be deleted */
-#define READ_CONTROL 0x00020000 /* The access control list and */
- /* ownership associated with the */
- /* file can be read */
-#define WRITE_DAC 0x00040000 /* The access control list and */
- /* ownership associated with the */
- /* file can be written. */
-#define WRITE_OWNER 0x00080000 /* Ownership information associated */
- /* with the file can be written */
-#define SYNCHRONIZE 0x00100000 /* The file handle can waited on to */
- /* synchronize with the completion */
- /* of an input/output request */
+#define FILE_READ_ATTRIBUTES 0x00000080 /* Attributes associated with the */
+ /* file can be read */
+#define FILE_WRITE_ATTRIBUTES 0x00000100 /* Attributes associated with the */
+ /* file can be written */
+#define DELETE 0x00010000 /* The file can be deleted */
+#define READ_CONTROL 0x00020000 /* The access control list and */
+ /* ownership associated with the */
+ /* file can be read */
+#define WRITE_DAC 0x00040000 /* The access control list and */
+ /* ownership associated with the */
+ /* file can be written. */
+#define WRITE_OWNER 0x00080000 /* Ownership information associated */
+ /* with the file can be written */
+#define SYNCHRONIZE 0x00100000 /* The file handle can waited on to */
+ /* synchronize with the completion */
+ /* of an input/output request */
#define GENERIC_ALL 0x10000000
#define GENERIC_EXECUTE 0x20000000
#define GENERIC_WRITE 0x40000000
/* In summary - Relevant file */
/* access flags from CIFS are */
/* file_read_data, file_write_data */
- /* file_execute, file_read_attributes */
+ /* file_execute, file_read_attributes*/
/* write_dac, and delete. */
/*
#define ATTR_SPARSE 0x0200
#define ATTR_REPARSE 0x0400
#define ATTR_COMPRESSED 0x0800
-#define ATTR_OFFLINE 0x1000 /* ie file not immediately available - offline storage */
+#define ATTR_OFFLINE 0x1000 /* ie file not immediately available -
+ on offline storage */
#define ATTR_NOT_CONTENT_INDEXED 0x2000
#define ATTR_ENCRYPTED 0x4000
#define ATTR_POSIX_SEMANTICS 0x01000000
/* CreateOptions */
#define CREATE_NOT_FILE 0x00000001 /* if set must not be file */
#define CREATE_WRITE_THROUGH 0x00000002
-#define CREATE_NOT_DIR 0x00000040 /* if set must not be directory */
+#define CREATE_SEQUENTIAL 0x00000004
+#define CREATE_SYNC_ALERT 0x00000010
+#define CREATE_ASYNC_ALERT 0x00000020
+#define CREATE_NOT_DIR 0x00000040 /* if set must not be directory */
+#define CREATE_NO_EA_KNOWLEDGE 0x00000200
+#define CREATE_EIGHT_DOT_THREE 0x00000400
#define CREATE_RANDOM_ACCESS 0x00000800
#define CREATE_DELETE_ON_CLOSE 0x00001000
+#define CREATE_OPEN_BY_ID 0x00002000
#define OPEN_REPARSE_POINT 0x00200000
+#define CREATE_OPTIONS_MASK 0x007FFFFF
+#define CREATE_OPTION_SPECIAL 0x20000000 /* system. NB not sent over wire */
/* ImpersonationLevel flags */
#define SECURITY_ANONYMOUS 0
#define GETU16(var) (*((__u16 *)var)) /* BB check for endian issues */
#define GETU32(var) (*((__u32 *)var)) /* BB check for endian issues */
-#pragma pack(1)
-
struct smb_hdr {
- __u32 smb_buf_length; /* big endian on wire *//* BB length is only two or three bytes - with one or two byte type preceding it but that is always zero - we could mask the type byte off just in case BB */
+ __u32 smb_buf_length; /* big endian on wire *//* BB length is only two
+ or three bytes - with one or two byte type preceding it that are
+ zero - we could mask the type byte off just in case BB */
__u8 Protocol[4];
__u8 Command;
union {
__u8 ErrorClass;
__u8 Reserved;
__le16 Error;
- } DosError;
+ } __attribute__((packed)) DosError;
__le32 CifsError;
- } Status;
+ } __attribute__((packed)) Status;
__u8 Flags;
__le16 Flags2; /* note: le */
__le16 PidHigh;
struct {
__le32 SequenceNumber; /* le */
__u32 Reserved; /* zero */
- } Sequence;
+ } __attribute__((packed)) Sequence;
__u8 SecuritySignature[8]; /* le */
- } Signature;
+ } __attribute__((packed)) Signature;
__u8 pad[2];
__u16 Tid;
__le16 Pid;
__u16 Uid;
__u16 Mid;
__u8 WordCount;
-};
+} __attribute__((packed));
/* given a pointer to an smb_hdr retrieve the value of byte count */
#define BCC(smb_var) ( *(__u16 *)((char *)smb_var + sizeof(struct smb_hdr) + (2* smb_var->WordCount) ) )
#define BCC_LE(smb_var) ( *(__le16 *)((char *)smb_var + sizeof(struct smb_hdr) + (2* smb_var->WordCount) ) )
struct smb_hdr hdr; /* wct = 0 */
__le16 ByteCount;
unsigned char DialectsArray[1];
-} NEGOTIATE_REQ;
+} __attribute__((packed)) NEGOTIATE_REQ;
typedef struct negotiate_rsp {
struct smb_hdr hdr; /* wct = 17 */
__u8 EncryptionKeyLength;
__u16 ByteCount;
union {
- unsigned char EncryptionKey[1]; /* if cap extended security is off */
+ unsigned char EncryptionKey[1]; /* cap extended security off */
/* followed by Domain name - if extended security is off */
/* followed by 16 bytes of server GUID */
- /* followed by security blob if cap_extended_security negotiated */
+ /* then security blob if cap_extended_security negotiated */
struct {
unsigned char GUID[16];
unsigned char SecurityBlob[1];
- } extended_response;
- } u;
-} NEGOTIATE_RSP;
+ } __attribute__((packed)) extended_response;
+ } __attribute__((packed)) u;
+} __attribute__((packed)) NEGOTIATE_RSP;
/* SecurityMode bits */
#define SECMODE_USER 0x01 /* off indicates share level security */
unsigned char SecurityBlob[1]; /* followed by */
/* STRING NativeOS */
/* STRING NativeLanMan */
- } req; /* NTLM request format (with extended security */
+ } __attribute__((packed)) req; /* NTLM request format (with
+ extended security */
struct { /* request format */
struct smb_hdr hdr; /* wct = 13 */
__le16 MaxMpxCount;
__le16 VcNumber;
__u32 SessionKey;
- __le16 CaseInsensitivePasswordLength; /* ASCII password length */
- __le16 CaseSensitivePasswordLength; /* Unicode password length */
+ __le16 CaseInsensitivePasswordLength; /* ASCII password len */
+ __le16 CaseSensitivePasswordLength; /* Unicode password length*/
__u32 Reserved; /* see below */
__le32 Capabilities;
__le16 ByteCount;
- unsigned char CaseInsensitivePassword[1]; /* followed by: */
+ unsigned char CaseInsensitivePassword[1]; /* followed by: */
/* unsigned char * CaseSensitivePassword; */
/* STRING AccountName */
/* STRING PrimaryDomain */
/* STRING NativeOS */
/* STRING NativeLanMan */
- } req_no_secext; /* NTLM request format (without extended security */
+ } __attribute__((packed)) req_no_secext; /* NTLM request format (without
+ extended security */
struct { /* default (NTLM) response format */
struct smb_hdr hdr; /* wct = 4 */
/* unsigned char * NativeOS; */
/* unsigned char * NativeLanMan; */
/* unsigned char * PrimaryDomain; */
- } resp; /* NTLM response format (with or without extended security */
+ } __attribute__((packed)) resp; /* NTLM response format (with or without extended security */
struct { /* request format */
struct smb_hdr hdr; /* wct = 10 */
/* STRING PrimaryDomain */
/* STRING NativeOS */
/* STRING NativeLanMan */
- } old_req; /* pre-NTLM (LANMAN2.1) request format */
+ } __attribute__((packed)) old_req; /* pre-NTLM (LANMAN2.1) request format */
struct { /* default (NTLM) response format */
struct smb_hdr hdr; /* wct = 3 */
unsigned char NativeOS[1]; /* followed by */
/* unsigned char * NativeLanMan; */
/* unsigned char * PrimaryDomain; */
- } old_resp; /* pre-NTLM (LANMAN2.1) response format */
-} SESSION_SETUP_ANDX;
+ } __attribute__((packed)) old_resp; /* pre-NTLM (LANMAN2.1) response format */
+} __attribute__((packed)) SESSION_SETUP_ANDX;
#define CIFS_NETWORK_OPSYS "CIFS VFS Client for Linux"
#define CAP_NT_SMBS 0x00000010
#define CAP_STATUS32 0x00000040
#define CAP_LEVEL_II_OPLOCKS 0x00000080
-#define CAP_NT_FIND 0x00000200 /* reserved should be zero (presumably because NT_SMBs implies the same thing) */
+#define CAP_NT_FIND 0x00000200 /* reserved should be zero
+ (because NT_SMBs implies the same thing?) */
#define CAP_BULK_TRANSFER 0x20000000
#define CAP_EXTENDED_SECURITY 0x80000000
unsigned char Password[1]; /* followed by */
/* STRING Path *//* \\server\share name */
/* STRING Service */
-} TCONX_REQ;
+} __attribute__((packed)) TCONX_REQ;
typedef struct smb_com_tconx_rsp {
struct smb_hdr hdr; /* wct = 3 *//* note that Win2000 has sent wct=7 in some cases on responses. Four unspecified words followed OptionalSupport */
__u16 ByteCount;
unsigned char Service[1]; /* always ASCII, not Unicode */
/* STRING NativeFileSystem */
-} TCONX_RSP;
+} __attribute__((packed)) TCONX_RSP;
/* tree connect Flags */
#define DISCONNECT_TID 0x0001
#define TCON_EXTENDED_SECINFO 0x0008
/* OptionalSupport bits */
-#define SMB_SUPPORT_SEARCH_BITS 0x0001 /* must have bits (exclusive searches suppt. */
+#define SMB_SUPPORT_SEARCH_BITS 0x0001 /* "must have" directory search bits
+ (exclusive searches supported) */
#define SMB_SHARE_IS_IN_DFS 0x0002
typedef struct smb_com_logoff_andx_req {
__u8 AndXReserved;
__u16 AndXOffset;
__u16 ByteCount;
-} LOGOFF_ANDX_REQ;
+} __attribute__((packed)) LOGOFF_ANDX_REQ;
typedef struct smb_com_logoff_andx_rsp {
struct smb_hdr hdr; /* wct = 2 */
__u8 AndXReserved;
__u16 AndXOffset;
__u16 ByteCount;
-} LOGOFF_ANDX_RSP;
+} __attribute__((packed)) LOGOFF_ANDX_RSP;
typedef union smb_com_tree_disconnect { /* as an altetnative can use flag on tree_connect PDU to effect disconnect *//* probably the simplest SMB PDU */
struct {
struct smb_hdr hdr; /* wct = 0 */
__u16 ByteCount; /* bcc = 0 */
- } req;
+ } __attribute__((packed)) req;
struct {
struct smb_hdr hdr; /* wct = 0 */
__u16 ByteCount; /* bcc = 0 */
- } resp;
-} TREE_DISCONNECT;
+ } __attribute__((packed)) resp;
+} __attribute__((packed)) TREE_DISCONNECT;
typedef struct smb_com_close_req {
struct smb_hdr hdr; /* wct = 3 */
__u16 FileID;
__u32 LastWriteTime; /* should be zero */
__u16 ByteCount; /* 0 */
-} CLOSE_REQ;
+} __attribute__((packed)) CLOSE_REQ;
typedef struct smb_com_close_rsp {
struct smb_hdr hdr; /* wct = 0 */
__u16 ByteCount; /* bct = 0 */
-} CLOSE_RSP;
+} __attribute__((packed)) CLOSE_RSP;
typedef struct smb_com_findclose_req {
struct smb_hdr hdr; /* wct = 1 */
__u16 FileID;
__u16 ByteCount; /* 0 */
-} FINDCLOSE_REQ;
+} __attribute__((packed)) FINDCLOSE_REQ;
/* OpenFlags */
+#define REQ_MORE_INFO 0x00000001 /* legacy (OPEN_AND_X) only */
#define REQ_OPLOCK 0x00000002
#define REQ_BATCHOPLOCK 0x00000004
#define REQ_OPENDIRONLY 0x00000008
__u8 SecurityFlags;
__le16 ByteCount;
char fileName[1];
-} OPEN_REQ;
+} __attribute__((packed)) OPEN_REQ;
/* open response: oplock levels */
#define OPLOCK_NONE 0
__le16 DeviceState;
__u8 DirectoryFlag;
__u16 ByteCount; /* bct = 0 */
-} OPEN_RSP;
+} __attribute__((packed)) OPEN_RSP;
+
+/* format of legacy open request */
+typedef struct smb_com_openx_req {
+ struct smb_hdr hdr; /* wct = 15 */
+ __u8 AndXCommand;
+ __u8 AndXReserved;
+ __le16 AndXOffset;
+ __le16 OpenFlags;
+ __le16 Mode;
+ __le16 Sattr; /* search attributes */
+ __le16 FileAttributes; /* dos attrs */
+ __le32 CreateTime; /* os2 format */
+ __le16 OpenFunction;
+ __le32 EndOfFile;
+ __le32 Timeout;
+ __le32 Reserved;
+ __le16 ByteCount; /* file name follows */
+ char fileName[1];
+} __attribute__((packed)) OPENX_REQ;
+
+typedef struct smb_com_openx_rsp {
+ struct smb_hdr hdr; /* wct = 15 */
+ __u8 AndXCommand;
+ __u8 AndXReserved;
+ __le16 AndXOffset;
+ __u16 Fid;
+ __le16 FileAttributes;
+ __le32 LastWriteTime; /* os2 format */
+ __le32 EndOfFile;
+ __le16 Access;
+ __le16 FileType;
+ __le16 IPCState;
+ __le16 Action;
+ __u32 FileId;
+ __u16 Reserved;
+ __u16 ByteCount;
+} __attribute__((packed)) OPENX_RSP;
+
+/* Legacy write request for older servers */
+typedef struct smb_com_writex_req {
+ struct smb_hdr hdr; /* wct = 12 */
+ __u8 AndXCommand;
+ __u8 AndXReserved;
+ __le16 AndXOffset;
+ __u16 Fid;
+ __le32 OffsetLow;
+ __u32 Reserved; /* Timeout */
+ __le16 WriteMode; /* 1 = write through */
+ __le16 Remaining;
+ __le16 Reserved2;
+ __le16 DataLengthLow;
+ __le16 DataOffset;
+ __le16 ByteCount;
+ __u8 Pad; /* BB check for whether padded to DWORD boundary and optimum performance here */
+ char Data[0];
+} __attribute__((packed)) WRITEX_REQ;
typedef struct smb_com_write_req {
struct smb_hdr hdr; /* wct = 14 */
__le16 ByteCount;
__u8 Pad; /* BB check for whether padded to DWORD boundary and optimum performance here */
char Data[0];
-} WRITE_REQ;
+} __attribute__((packed)) WRITE_REQ;
typedef struct smb_com_write_rsp {
struct smb_hdr hdr; /* wct = 6 */
__le16 CountHigh;
__u16 Reserved;
__u16 ByteCount;
-} WRITE_RSP;
+} __attribute__((packed)) WRITE_RSP;
+
+/* legacy read request for older servers */
+typedef struct smb_com_readx_req {
+ struct smb_hdr hdr; /* wct = 10 */
+ __u8 AndXCommand;
+ __u8 AndXReserved;
+ __le16 AndXOffset;
+ __u16 Fid;
+ __le32 OffsetLow;
+ __le16 MaxCount;
+ __le16 MinCount; /* obsolete */
+ __le32 Reserved;
+ __le16 Remaining;
+ __le16 ByteCount;
+} __attribute__((packed)) READX_REQ;
typedef struct smb_com_read_req {
struct smb_hdr hdr; /* wct = 12 */
__le16 Remaining;
__le32 OffsetHigh;
__le16 ByteCount;
-} READ_REQ;
+} __attribute__((packed)) READ_REQ;
typedef struct smb_com_read_rsp {
struct smb_hdr hdr; /* wct = 12 */
__u16 ByteCount;
__u8 Pad; /* BB check for whether padded to DWORD boundary and optimum performance here */
char Data[1];
-} READ_RSP;
+} __attribute__((packed)) READ_RSP;
typedef struct locking_andx_range {
__le16 Pid;
__le32 OffsetLow;
__le32 LengthHigh;
__le32 LengthLow;
-} LOCKING_ANDX_RANGE;
+} __attribute__((packed)) LOCKING_ANDX_RANGE;
#define LOCKING_ANDX_SHARED_LOCK 0x01
#define LOCKING_ANDX_OPLOCK_RELEASE 0x02
__le16 NumberOfLocks;
__le16 ByteCount;
LOCKING_ANDX_RANGE Locks[1];
-} LOCK_REQ;
+} __attribute__((packed)) LOCK_REQ;
typedef struct cifs_posix_lock {
__le64 start;
__le64 length;
/* BB what about additional owner info to identify network client */
-} CIFS_POSIX_LOCK;
+} __attribute__((packed)) CIFS_POSIX_LOCK;
typedef struct smb_com_lock_rsp {
struct smb_hdr hdr; /* wct = 2 */
__u8 AndXReserved;
__le16 AndXOffset;
__u16 ByteCount;
-} LOCK_RSP;
+} __attribute__((packed)) LOCK_RSP;
typedef struct smb_com_rename_req {
struct smb_hdr hdr; /* wct = 1 */
unsigned char OldFileName[1];
/* followed by __u8 BufferFormat2 */
/* followed by NewFileName */
-} RENAME_REQ;
+} __attribute__((packed)) RENAME_REQ;
/* copy request flags */
#define COPY_MUST_BE_FILE 0x0001
unsigned char OldFileName[1];
/* followed by __u8 BufferFormat2 */
/* followed by NewFileName string */
-} COPY_REQ;
+} __attribute__((packed)) COPY_REQ;
typedef struct smb_com_copy_rsp {
struct smb_hdr hdr; /* wct = 1 */
__u16 ByteCount; /* may be zero */
__u8 BufferFormat; /* 0x04 - only present if errored file follows */
unsigned char ErrorFileName[1]; /* only present if error in copy */
-} COPY_RSP;
+} __attribute__((packed)) COPY_RSP;
#define CREATE_HARD_LINK 0x103
#define MOVEFILE_COPY_ALLOWED 0x0002
unsigned char OldFileName[1];
/* followed by __u8 BufferFormat2 */
/* followed by NewFileName */
-} NT_RENAME_REQ;
+} __attribute__((packed)) NT_RENAME_REQ;
typedef struct smb_com_rename_rsp {
struct smb_hdr hdr; /* wct = 0 */
__u16 ByteCount; /* bct = 0 */
-} RENAME_RSP;
+} __attribute__((packed)) RENAME_RSP;
typedef struct smb_com_delete_file_req {
struct smb_hdr hdr; /* wct = 1 */
__le16 ByteCount;
__u8 BufferFormat; /* 4 = ASCII */
unsigned char fileName[1];
-} DELETE_FILE_REQ;
+} __attribute__((packed)) DELETE_FILE_REQ;
typedef struct smb_com_delete_file_rsp {
struct smb_hdr hdr; /* wct = 0 */
__u16 ByteCount; /* bct = 0 */
-} DELETE_FILE_RSP;
+} __attribute__((packed)) DELETE_FILE_RSP;
typedef struct smb_com_delete_directory_req {
struct smb_hdr hdr; /* wct = 0 */
__le16 ByteCount;
__u8 BufferFormat; /* 4 = ASCII */
unsigned char DirName[1];
-} DELETE_DIRECTORY_REQ;
+} __attribute__((packed)) DELETE_DIRECTORY_REQ;
typedef struct smb_com_delete_directory_rsp {
struct smb_hdr hdr; /* wct = 0 */
__u16 ByteCount; /* bct = 0 */
-} DELETE_DIRECTORY_RSP;
+} __attribute__((packed)) DELETE_DIRECTORY_RSP;
typedef struct smb_com_create_directory_req {
struct smb_hdr hdr; /* wct = 0 */
__le16 ByteCount;
__u8 BufferFormat; /* 4 = ASCII */
unsigned char DirName[1];
-} CREATE_DIRECTORY_REQ;
+} __attribute__((packed)) CREATE_DIRECTORY_REQ;
typedef struct smb_com_create_directory_rsp {
struct smb_hdr hdr; /* wct = 0 */
__u16 ByteCount; /* bct = 0 */
-} CREATE_DIRECTORY_RSP;
+} __attribute__((packed)) CREATE_DIRECTORY_RSP;
+
+typedef struct smb_com_query_information_req {
+ struct smb_hdr hdr; /* wct = 0 */
+ __le16 ByteCount; /* 1 + namelen + 1 */
+ __u8 BufferFormat; /* 4 = ASCII */
+ unsigned char FileName[1];
+} __attribute__((packed)) QUERY_INFORMATION_REQ;
+
+typedef struct smb_com_query_information_rsp {
+ struct smb_hdr hdr; /* wct = 10 */
+ __le16 attr;
+ __le32 last_write_time;
+ __le32 size;
+ __u16 reserved[5];
+ __le16 ByteCount; /* bcc = 0 */
+} __attribute__((packed)) QUERY_INFORMATION_RSP;
typedef struct smb_com_setattr_req {
struct smb_hdr hdr; /* wct = 8 */
__u16 ByteCount;
__u8 BufferFormat; /* 4 = ASCII */
unsigned char fileName[1];
-} SETATTR_REQ;
+} __attribute__((packed)) SETATTR_REQ;
typedef struct smb_com_setattr_rsp {
struct smb_hdr hdr; /* wct = 0 */
__u16 ByteCount; /* bct = 0 */
-} SETATTR_RSP;
+} __attribute__((packed)) SETATTR_RSP;
/* empty wct response to setattr */
__le16 ByteCount;
__u8 Pad[3];
__u8 Data[1];
-} TRANSACT_IOCTL_REQ;
+} __attribute__((packed)) TRANSACT_IOCTL_REQ;
typedef struct smb_com_transaction_ioctl_rsp {
struct smb_hdr hdr; /* wct = 19 */
__le16 ReturnedDataLen;
__u16 ByteCount;
__u8 Pad[3];
-} TRANSACT_IOCTL_RSP;
+} __attribute__((packed)) TRANSACT_IOCTL_RSP;
typedef struct smb_com_transaction_change_notify_req {
struct smb_hdr hdr; /* wct = 23 */
__le16 ByteCount;
/* __u8 Pad[3];*/
/* __u8 Data[1];*/
-} TRANSACT_CHANGE_NOTIFY_REQ;
+} __attribute__((packed)) TRANSACT_CHANGE_NOTIFY_REQ;
typedef struct smb_com_transaction_change_notify_rsp {
struct smb_hdr hdr; /* wct = 18 */
__u8 SetupCount; /* 0 */
__u16 ByteCount;
/* __u8 Pad[3]; */
-} TRANSACT_CHANGE_NOTIFY_RSP;
+} __attribute__((packed)) TRANSACT_CHANGE_NOTIFY_RSP;
/* Completion Filter flags for Notify */
#define FILE_NOTIFY_CHANGE_FILE_NAME 0x00000001
#define FILE_NOTIFY_CHANGE_DIR_NAME 0x00000002
__le32 Action;
__le32 FileNameLength;
__u8 FileName[0];
-};
+} __attribute__((packed));
struct reparse_data {
__u32 ReparseTag;
__u16 TargetNameOffset;
__u16 TargetNameLen;
char LinkNamesBuf[1];
-};
+} __attribute__((packed));
struct cifs_quota_data {
__u32 rsrvd1; /* 0 */
__u64 soft_limit;
__u64 hard_limit;
char sid[1]; /* variable size? */
-};
+} __attribute__((packed));
/* quota sub commands */
#define QUOTA_LIST_CONTINUE 0
__u8 Reserved3;
__le16 SubCommand; /* 1st setup word - SetupCount words follow */
__le16 ByteCount;
-};
+} __attribute__((packed));
struct smb_t2_req {
struct smb_hdr hdr;
struct trans2_req t2_req;
-};
+} __attribute__((packed));
struct trans2_resp {
/* struct smb_hdr hdr precedes. Note wct = 10 + setup count */
__u16 ByteCount;
__u16 Reserved2;*/
/* data area follows */
-};
+} __attribute__((packed));
struct smb_t2_rsp {
struct smb_hdr hdr;
struct trans2_resp t2_rsp;
-};
+} __attribute__((packed));
/* PathInfo/FileInfo infolevels */
#define SMB_INFO_STANDARD 1
__le16 InformationLevel;
__u32 Reserved4;
char FileName[1];
-} TRANSACTION2_QPI_REQ;
+} __attribute__((packed)) TRANSACTION2_QPI_REQ;
typedef struct smb_com_transaction2_qpi_rsp {
struct smb_hdr hdr; /* wct = 10 + SetupCount */
struct trans2_resp t2;
__u16 ByteCount;
__u16 Reserved2; /* parameter word reserved - present for infolevels > 100 */
-} TRANSACTION2_QPI_RSP;
+} __attribute__((packed)) TRANSACTION2_QPI_RSP;
typedef struct smb_com_transaction2_spi_req {
struct smb_hdr hdr; /* wct = 15 */
__le16 InformationLevel;
__u32 Reserved4;
char FileName[1];
-} TRANSACTION2_SPI_REQ;
+} __attribute__((packed)) TRANSACTION2_SPI_REQ;
typedef struct smb_com_transaction2_spi_rsp {
struct smb_hdr hdr; /* wct = 10 + SetupCount */
struct trans2_resp t2;
__u16 ByteCount;
__u16 Reserved2; /* parameter word reserved - present for infolevels > 100 */
-} TRANSACTION2_SPI_RSP;
+} __attribute__((packed)) TRANSACTION2_SPI_RSP;
struct set_file_rename {
__le32 overwrite; /* 1 = overwrite dest */
__u32 root_fid; /* zero */
__le32 target_name_len;
char target_name[0]; /* Must be unicode */
-};
+} __attribute__((packed));
struct smb_com_transaction2_sfi_req {
struct smb_hdr hdr; /* wct = 15 */
__u16 Fid;
__le16 InformationLevel;
__u16 Reserved4;
-};
+} __attribute__((packed));
struct smb_com_transaction2_sfi_rsp {
struct smb_hdr hdr; /* wct = 10 + SetupCount */
__u16 ByteCount;
__u16 Reserved2; /* parameter word reserved -
present for infolevels > 100 */
-};
+} __attribute__((packed));
struct smb_t2_qfi_req {
struct smb_hdr hdr;
__u8 Pad;
__u16 Fid;
__le16 InformationLevel;
-};
+} __attribute__((packed));
struct smb_t2_qfi_rsp {
struct smb_hdr hdr; /* wct = 10 + SetupCount */
__u16 ByteCount;
__u16 Reserved2; /* parameter word reserved -
present for infolevels > 100 */
-};
+} __attribute__((packed));
/*
* Flags on T2 FINDFIRST and FINDNEXT
__le16 InformationLevel;
__le32 SearchStorageType;
char FileName[1];
-} TRANSACTION2_FFIRST_REQ;
+} __attribute__((packed)) TRANSACTION2_FFIRST_REQ;
typedef struct smb_com_transaction2_ffirst_rsp {
struct smb_hdr hdr; /* wct = 10 */
struct trans2_resp t2;
__u16 ByteCount;
-} TRANSACTION2_FFIRST_RSP;
+} __attribute__((packed)) TRANSACTION2_FFIRST_RSP;
typedef struct smb_com_transaction2_ffirst_rsp_parms {
__u16 SearchHandle;
__le16 EndofSearch;
__le16 EAErrorOffset;
__le16 LastNameOffset;
-} T2_FFIRST_RSP_PARMS;
+} __attribute__((packed)) T2_FFIRST_RSP_PARMS;
typedef struct smb_com_transaction2_fnext_req {
struct smb_hdr hdr; /* wct = 15 */
__u32 ResumeKey;
__le16 SearchFlags;
char ResumeFileName[1];
-} TRANSACTION2_FNEXT_REQ;
+} __attribute__((packed)) TRANSACTION2_FNEXT_REQ;
typedef struct smb_com_transaction2_fnext_rsp {
struct smb_hdr hdr; /* wct = 10 */
struct trans2_resp t2;
__u16 ByteCount;
-} TRANSACTION2_FNEXT_RSP;
+} __attribute__((packed)) TRANSACTION2_FNEXT_RSP;
typedef struct smb_com_transaction2_fnext_rsp_parms {
__le16 SearchCount;
__le16 EndofSearch;
__le16 EAErrorOffset;
__le16 LastNameOffset;
-} T2_FNEXT_RSP_PARMS;
+} __attribute__((packed)) T2_FNEXT_RSP_PARMS;
/* QFSInfo Levels */
#define SMB_INFO_ALLOCATION 1
__le16 ByteCount;
__u8 Pad;
__le16 InformationLevel;
-} TRANSACTION2_QFSI_REQ;
+} __attribute__((packed)) TRANSACTION2_QFSI_REQ;
typedef struct smb_com_transaction_qfsi_rsp {
struct smb_hdr hdr; /* wct = 10 + SetupCount */
struct trans2_resp t2;
__u16 ByteCount;
__u8 Pad; /* may be three bytes *//* followed by data area */
-} TRANSACTION2_QFSI_RSP;
+} __attribute__((packed)) TRANSACTION2_QFSI_RSP;
+
+
+/* SETFSInfo Levels */
+#define SMB_SET_CIFS_UNIX_INFO 0x200
+typedef struct smb_com_transaction2_setfsi_req {
+ struct smb_hdr hdr; /* wct = 15 */
+ __le16 TotalParameterCount;
+ __le16 TotalDataCount;
+ __le16 MaxParameterCount;
+ __le16 MaxDataCount;
+ __u8 MaxSetupCount;
+ __u8 Reserved;
+ __le16 Flags;
+ __le32 Timeout;
+ __u16 Reserved2;
+ __le16 ParameterCount; /* 4 */
+ __le16 ParameterOffset;
+ __le16 DataCount; /* 12 */
+ __le16 DataOffset;
+ __u8 SetupCount; /* one */
+ __u8 Reserved3;
+ __le16 SubCommand; /* TRANS2_SET_FS_INFORMATION */
+ __le16 ByteCount;
+ __u8 Pad;
+ __u16 FileNum; /* Parameters start. */
+ __le16 InformationLevel;/* Parameters end. */
+ __le16 ClientUnixMajor; /* Data start. */
+ __le16 ClientUnixMinor;
+ __le64 ClientUnixCap; /* Data end */
+} __attribute__((packed)) TRANSACTION2_SETFSI_REQ;
+
+typedef struct smb_com_transaction2_setfsi_rsp {
+ struct smb_hdr hdr; /* wct = 10 */
+ struct trans2_resp t2;
+ __u16 ByteCount;
+} __attribute__((packed)) TRANSACTION2_SETFSI_RSP;
+
typedef struct smb_com_transaction2_get_dfs_refer_req {
struct smb_hdr hdr; /* wct = 15 */
__u8 Pad[3]; /* Win2K has sent 0x0F01 (max resp length perhaps?) followed by one byte pad - doesn't seem to matter though */
__le16 MaxReferralLevel;
char RequestFileName[1];
-} TRANSACTION2_GET_DFS_REFER_REQ;
+} __attribute__((packed)) TRANSACTION2_GET_DFS_REFER_REQ;
typedef struct dfs_referral_level_3 {
__le16 VersionNumber;
__le16 DfsPathOffset;
__le16 DfsAlternatePathOffset;
__le16 NetworkAddressOffset;
-} REFERRAL3;
+} __attribute__((packed)) REFERRAL3;
typedef struct smb_com_transaction_get_dfs_refer_rsp {
struct smb_hdr hdr; /* wct = 10 */
__u16 Pad2;
REFERRAL3 referrals[1]; /* array of level 3 dfs_referral structures */
/* followed by the strings pointed to by the referral structures */
-} TRANSACTION2_GET_DFS_REFER_RSP;
+} __attribute__((packed)) TRANSACTION2_GET_DFS_REFER_RSP;
/* DFS Flags */
#define DFSREF_REFERRAL_SERVER 0x0001
unsigned char versionMinor;
unsigned long type;
unsigned int commentOffset;
-};
+} __attribute__((packed));
/*
* The following structure is the format of the data returned on a NetShareEnum
char pad;
unsigned short type;
unsigned int commentOffset;
-};
+} __attribute__((packed));
struct aliasInfo {
char aliasName[9];
char pad;
unsigned int commentOffset;
unsigned char type[2];
-};
+} __attribute__((packed));
struct aliasInfo92 {
int aliasNameOffset;
int serverNameOffset;
int shareNameOffset;
-};
+} __attribute__((packed));
typedef struct {
__le64 TotalAllocationUnits;
__le64 FreeAllocationUnits;
__le32 SectorsPerAllocationUnit;
__le32 BytesPerSector;
-} FILE_SYSTEM_INFO; /* size info, level 0x103 */
+} __attribute__((packed)) FILE_SYSTEM_INFO; /* size info, level 0x103 */
+
+typedef struct {
+ __le32 fsid;
+ __le32 SectorsPerAllocationUnit;
+ __le32 TotalAllocationUnits;
+ __le32 FreeAllocationUnits;
+ __le16 BytesPerSector;
+} __attribute__((packed)) FILE_SYSTEM_ALLOC_INFO;
typedef struct {
__le16 MajorVersionNumber;
__le16 MinorVersionNumber;
__le64 Capability;
-} FILE_SYSTEM_UNIX_INFO; /* Unix extensions info, level 0x200 */
+} __attribute__((packed)) FILE_SYSTEM_UNIX_INFO; /* Unix extensions info, level 0x200 */
+
+/* Version numbers for CIFS UNIX major and minor. */
+#define CIFS_UNIX_MAJOR_VERSION 1
+#define CIFS_UNIX_MINOR_VERSION 0
+
/* Linux/Unix extensions capability flags */
#define CIFS_UNIX_FCNTL_CAP 0x00000001 /* support for fcntl locks */
#define CIFS_UNIX_POSIX_ACL_CAP 0x00000002 /* support getfacl/setfacl */
#define CIFS_UNIX_XATTR_CAP 0x00000004 /* support new namespace */
#define CIFS_UNIX_EXTATTR_CAP 0x00000008 /* support chattr/chflag */
+#define CIFS_UNIX_POSIX_PATHNAMES_CAP 0x00000010 /* Use POSIX pathnames on the wire. */
+
#define CIFS_POSIX_EXTENSIONS 0x00000010 /* support for new QFSInfo */
+
typedef struct {
/* For undefined recommended transfer size return -1 in that field */
__le32 OptimalTransferSize; /* bsize on some os, iosize on other os */
__le64 FileSysIdentifier; /* fsid */
/* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
/* NB flags can come from FILE_SYSTEM_DEVICE_INFO call */
-} FILE_SYSTEM_POSIX_INFO;
+} __attribute__((packed)) FILE_SYSTEM_POSIX_INFO;
/* DeviceType Flags */
#define FILE_DEVICE_CD_ROM 0x00000002
typedef struct {
__le32 DeviceType;
__le32 DeviceCharacteristics;
-} FILE_SYSTEM_DEVICE_INFO; /* device info, level 0x104 */
+} __attribute__((packed)) FILE_SYSTEM_DEVICE_INFO; /* device info, level 0x104 */
typedef struct {
__le32 Attributes;
__le32 MaxPathNameComponentLength;
__le32 FileSystemNameLen;
char FileSystemName[52]; /* do not really need to save this - so potentially get only subset of name */
-} FILE_SYSTEM_ATTRIBUTE_INFO;
+} __attribute__((packed)) FILE_SYSTEM_ATTRIBUTE_INFO;
/******************************************************************************/
/* QueryFileInfo/QueryPathinfo (also for SetPath/SetFile) data buffer formats */
__le32 AlignmentRequirement;
__le32 FileNameLength;
char FileName[1];
-} FILE_ALL_INFO; /* level 0x107 QPathInfo */
+} __attribute__((packed)) FILE_ALL_INFO; /* level 0x107 QPathInfo */
/* defines for enumerating possible values of the Unix type field below */
#define UNIX_FILE 0
__u64 UniqueId;
__le64 Permissions;
__le64 Nlinks;
-} FILE_UNIX_BASIC_INFO; /* level 0x200 QPathInfo */
+} __attribute__((packed)) FILE_UNIX_BASIC_INFO; /* level 0x200 QPathInfo */
typedef struct {
char LinkDest[1];
-} FILE_UNIX_LINK_INFO; /* level 0x201 QPathInfo */
+} __attribute__((packed)) FILE_UNIX_LINK_INFO; /* level 0x201 QPathInfo */
/* The following three structures are needed only for
setting time to NT4 and some older servers via
__u16 Day:5;
__u16 Month:4;
__u16 Year:7;
-} SMB_DATE;
+} __attribute__((packed)) SMB_DATE;
typedef struct {
__u16 TwoSeconds:5;
__u16 Minutes:6;
__u16 Hours:5;
-} SMB_TIME;
+} __attribute__((packed)) SMB_TIME;
typedef struct {
__le16 CreationDate; /* SMB Date see above */
__le32 AllocationSize;
__le16 Attributes; /* verify not u32 */
__le32 EASize;
-} FILE_INFO_STANDARD; /* level 1 SetPath/FileInfo */
+} __attribute__((packed)) FILE_INFO_STANDARD; /* level 1 SetPath/FileInfo */
typedef struct {
__le64 CreationTime;
__le64 ChangeTime;
__le32 Attributes;
__u32 Pad;
-} FILE_BASIC_INFO; /* size info, level 0x101 */
+} __attribute__((packed)) FILE_BASIC_INFO; /* size info, level 0x101 */
struct file_allocation_info {
__le64 AllocationSize; /* Note old Samba srvr rounds this up too much */
-}; /* size used on disk, level 0x103 for set, 0x105 for query */
+} __attribute__((packed)); /* size used on disk, level 0x103 for set, 0x105 for query */
struct file_end_of_file_info {
__le64 FileSize; /* offset to end of file */
-}; /* size info, level 0x104 for set, 0x106 for query */
+} __attribute__((packed)); /* size info, level 0x104 for set, 0x106 for query */
struct file_alt_name_info {
__u8 alt_name[1];
-}; /* level 0x0108 */
+} __attribute__((packed)); /* level 0x0108 */
struct file_stream_info {
__le32 number_of_streams; /* BB check sizes and verify location */
__u8 ch_shift;
__u8 cl_shift;
__u8 pad[3];
-}; /* level 0x10b */
+} __attribute__((packed)); /* level 0x10b */
/* POSIX ACL set/query path info structures */
#define CIFS_ACL_VERSION 1
__u8 cifs_e_tag;
__u8 cifs_e_perm;
__le64 cifs_uid; /* or gid */
-};
+} __attribute__((packed));
struct cifs_posix_acl { /* access conrol list (ACL) */
__le16 version;
struct cifs_posix_ace ace_array[0];
/* followed by
struct cifs_posix_ace default_ace_arraay[] */
-}; /* level 0x204 */
+} __attribute__((packed)); /* level 0x204 */
/* types of access control entries already defined in posix_acl.h */
/* #define CIFS_POSIX_ACL_USER_OBJ 0x01
struct file_internal_info {
__u64 UniqueId; /* inode number */
-}; /* level 0x3ee */
+} __attribute__((packed)); /* level 0x3ee */
struct file_mode_info {
__le32 Mode;
-}; /* level 0x3f8 */
+} __attribute__((packed)); /* level 0x3f8 */
struct file_attrib_tag {
__le32 Attribute;
__le32 ReparseTag;
-}; /* level 0x40b */
+} __attribute__((packed)); /* level 0x40b */
/********************************************************/
__le64 Permissions;
__le64 Nlinks;
char FileName[1];
-} FILE_UNIX_INFO; /* level 0x202 */
+} __attribute__((packed)) FILE_UNIX_INFO; /* level 0x202 */
typedef struct {
__le32 NextEntryOffset;
__le32 ExtFileAttributes;
__le32 FileNameLength;
char FileName[1];
-} FILE_DIRECTORY_INFO; /* level 0x101 FF response data area */
+} __attribute__((packed)) FILE_DIRECTORY_INFO; /* level 0x101 FF response data area */
typedef struct {
__le32 NextEntryOffset;
__le32 FileNameLength;
__le32 EaSize; /* length of the xattrs */
char FileName[1];
-} FILE_FULL_DIRECTORY_INFO; /* level 0x102 FF response data area */
+} __attribute__((packed)) FILE_FULL_DIRECTORY_INFO; /* level 0x102 FF response data area */
typedef struct {
__le32 NextEntryOffset;
__le32 Reserved;
__u64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/
char FileName[1];
-} SEARCH_ID_FULL_DIR_INFO; /* level 0x105 FF response data area */
+} __attribute__((packed)) SEARCH_ID_FULL_DIR_INFO; /* level 0x105 FF response data area */
typedef struct {
__le32 NextEntryOffset;
__u8 Reserved;
__u8 ShortName[12];
char FileName[1];
-} FILE_BOTH_DIRECTORY_INFO; /* level 0x104 FF response data area */
+} __attribute__((packed)) FILE_BOTH_DIRECTORY_INFO; /* level 0x104 FF response data area */
struct gea {
unsigned char name_len;
char name[1];
-};
+} __attribute__((packed));
struct gealist {
unsigned long list_len;
struct gea list[1];
-};
+} __attribute__((packed));
struct fea {
unsigned char EA_flags;
__le16 value_len;
char name[1];
/* optionally followed by value */
-};
+} __attribute__((packed));
/* flags for _FEA.fEA */
#define FEA_NEEDEA 0x80 /* need EA bit */
struct fealist {
__le32 list_len;
struct fea list[1];
-};
+} __attribute__((packed));
/* used to hold an arbitrary blob of data */
struct data_blob {
__u8 *data;
size_t length;
void (*free) (struct data_blob * data_blob);
-};
+} __attribute__((packed));
#ifdef CONFIG_CIFS_POSIX
perhaps add a CreateDevice - to create Pipes and other special .inodes
Also note POSIX open flags
2) Close - to return the last write time to do cache across close more safely
- 3) PosixQFSInfo - to return statfs info
- 4) FindFirst return unique inode number - what about resume key, two forms short (matches readdir) and full (enough info to cache inodes)
- 5) Mkdir - set mode
+ 3) FindFirst return unique inode number - what about resume key, two
+ forms short (matches readdir) and full (enough info to cache inodes)
+ 4) Mkdir - set mode
And under consideration:
- 6) FindClose2 (return nanosecond timestamp ??)
- 7) Use nanosecond timestamps throughout all time fields if
+ 5) FindClose2 (return nanosecond timestamp ??)
+ 6) Use nanosecond timestamps throughout all time fields if
corresponding attribute flag is set
- 8) sendfile - handle based copy
- 9) Direct i/o
- 10) "POSIX ACL" support
- 11) Misc fcntls?
+ 7) sendfile - handle based copy
+ 8) Direct i/o
+ 9) Misc fcntls?
what about fixing 64 bit alignment
*/
-/* xsymlink is a symlink format that can be used
+/* xsymlink is a symlink format (used by MacOS) that can be used
to save symlink info in a regular file when
mounted to operating systems that do not
support the cifs Unix extensions or EAs (for xattr
char cr2; /* \n */
/* if room left, then end with \n then 0x20s by convention but not required */
char path[1024];
-};
+} __attribute__((packed));
typedef struct file_xattr_info {
/* BB do we need another field for flags? BB */
__u32 xattr_value_len;
char xattr_name[0];
/* followed by xattr_value[xattr_value_len], no pad */
-} FILE_XATTR_INFO; /* extended attribute, info level 0x205 */
+} __attribute__((packed)) FILE_XATTR_INFO; /* extended attribute, info level 0x205 */
/* flags for chattr command */
typedef struct file_chattr_info {
__le64 mask; /* list of all possible attribute bits */
__le64 mode; /* list of actual attribute bits on this inode */
-} FILE_CHATTR_INFO; /* ext attributes (chattr, chflags) level 0x206 */
+} __attribute__((packed)) FILE_CHATTR_INFO; /* ext attributes (chattr, chflags) level 0x206 */
#endif
-#pragma pack() /* resume default structure packing */
-
#endif /* _CIFSPDU_H */
struct smb_hdr * /* input */ ,
struct smb_hdr * /* out */ ,
int * /* bytes returned */ , const int long_op);
+extern int SendReceive2(const unsigned int /* xid */ , struct cifsSesInfo *,
+ struct kvec *, int /* nvec */,
+ int * /* bytes returned */ , const int long_op);
extern int checkSMBhdr(struct smb_hdr *smb, __u16 mid);
extern int checkSMB(struct smb_hdr *smb, __u16 mid, int length);
extern int is_valid_oplock_break(struct smb_hdr *smb);
extern int is_size_safe_to_change(struct cifsInodeInfo *);
+extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *);
extern unsigned int smbCalcSize(struct smb_hdr *ptr);
+extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr);
extern int decode_negTokenInit(unsigned char *security_blob, int length,
enum securityEnum *secType);
extern int cifs_inet_pton(int, char * source, void *dst);
extern int map_smb_to_linux_error(struct smb_hdr *smb);
extern void header_assemble(struct smb_hdr *, char /* command */ ,
- const struct cifsTconInfo *, int /* specifies length
- of fixed section (word count) in two byte units */
- );
+ const struct cifsTconInfo *, int /* length of
+ fixed section (word count) in two byte units */);
+extern __u16 GetNextMid(struct TCP_Server_Info *server);
extern struct oplock_q_entry * AllocOplockQEntry(struct inode *, u16,
struct cifsTconInfo *);
extern void DeleteOplockQEntry(struct oplock_q_entry *);
extern int CIFSFindFirst(const int xid, struct cifsTconInfo *tcon,
const char *searchName, const struct nls_table *nls_codepage,
- __u16 *searchHandle, struct cifs_search_info * psrch_inf, int map);
+ __u16 *searchHandle, struct cifs_search_info * psrch_inf, int map, const char dirsep);
extern int CIFSFindNext(const int xid, struct cifsTconInfo *tcon,
__u16 searchHandle, struct cifs_search_info * psrch_inf);
const unsigned char *searchName,
FILE_ALL_INFO * findData,
const struct nls_table *nls_codepage, int remap);
+extern int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon,
+ const unsigned char *searchName,
+ FILE_ALL_INFO * findData,
+ const struct nls_table *nls_codepage, int remap);
extern int CIFSSMBUnixQPathInfo(const int xid,
struct cifsTconInfo *tcon,
int remap);
extern int CIFSSMBQFSInfo(const int xid, struct cifsTconInfo *tcon,
struct kstatfs *FSData);
+extern int SMBOldQFSInfo(const int xid, struct cifsTconInfo *tcon,
+ struct kstatfs *FSData);
+extern int CIFSSMBSetFSUnixInfo(const int xid, struct cifsTconInfo *tcon,
+ __u64 cap);
+
extern int CIFSSMBQFSAttributeInfo(const int xid,
struct cifsTconInfo *tcon);
extern int CIFSSMBQFSDeviceInfo(const int xid, struct cifsTconInfo *tcon);
const int access_flags, const int omode,
__u16 * netfid, int *pOplock, FILE_ALL_INFO *,
const struct nls_table *nls_codepage, int remap);
+extern int SMBLegacyOpen(const int xid, struct cifsTconInfo *tcon,
+ const char *fileName, const int disposition,
+ const int access_flags, const int omode,
+ __u16 * netfid, int *pOplock, FILE_ALL_INFO *,
+ const struct nls_table *nls_codepage, int remap);
extern int CIFSSMBClose(const int xid, struct cifsTconInfo *tcon,
const int smb_file_id);
extern int CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
const int netfid, const unsigned int count,
const __u64 offset, unsigned int *nbytes,
- const char __user *buf,const int long_op);
+ struct kvec *iov, const int nvec, const int long_op);
extern int CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, __u64 * inode_number,
const struct nls_table *nls_codepage,
int remap_special_chars);
extern int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
const int notify_subdirs,const __u16 netfid,
- __u32 filter, const struct nls_table *nls_codepage);
+ __u32 filter, struct file * file, int multishot,
+ const struct nls_table *nls_codepage);
extern ssize_t CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, char * EAData,
size_t bufsize, const struct nls_table *nls_codepage,
rc = CIFSTCon(0, tcon->ses, tcon->treeName, tcon
, nls_codepage);
up(&tcon->ses->sesSem);
+ /* BB FIXME add code to check if wsize needs
+ update due to negotiated smb buffer size
+ shrinking */
if(rc == 0)
atomic_inc(&tconInfoReconnectCount);
header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon,wct);
-#ifdef CONFIG_CIFS_STATS
- if(tcon != NULL) {
- atomic_inc(&tcon->num_smbs_sent);
- }
-#endif /* CONFIG_CIFS_STATS */
+ if(tcon != NULL)
+ cifs_stats_inc(&tcon->num_smbs_sent);
+
return rc;
}
rc = CIFSTCon(0, tcon->ses, tcon->treeName,
tcon, nls_codepage);
up(&tcon->ses->sesSem);
+ /* BB FIXME add code to check if wsize needs
+ update due to negotiated smb buffer size
+ shrinking */
if(rc == 0)
atomic_inc(&tconInfoReconnectCount);
header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon,
wct /*wct */ );
-#ifdef CONFIG_CIFS_STATS
- if(tcon != NULL) {
- atomic_inc(&tcon->num_smbs_sent);
- }
-#endif /* CONFIG_CIFS_STATS */
+ if(tcon != NULL)
+ cifs_stats_inc(&tcon->num_smbs_sent);
+
return rc;
}
(void **) &pSMB, (void **) &pSMBr);
if (rc)
return rc;
-
+ pSMB->hdr.Mid = GetNextMid(server);
pSMB->hdr.Flags2 |= SMBFLG2_UNICODE;
if (extended_security)
pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
}
}
- if (pSMB)
- cifs_buf_release(pSMB);
+
+ cifs_buf_release(pSMB);
return rc;
}
smb_buffer_response = (struct smb_hdr *)pSMB; /* BB removeme BB */
if(ses->server) {
+ pSMB->hdr.Mid = GetNextMid(ses->server);
+
if(ses->server->secMode &
(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
rc = -ESHUTDOWN;
}
}
- if (pSMB)
- cifs_small_buf_release(pSMB);
up(&ses->sesSem);
+ cifs_small_buf_release(pSMB);
/* if session dead then we do not need to do ulogoff,
since server closed smb session, no sense reporting
pSMB->ByteCount = cpu_to_le16(name_len + 1);
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_deletes);
if (rc) {
cFYI(1, ("Error in RMFile = %d", rc));
}
-#ifdef CONFIG_CIFS_STATS
- else {
- atomic_inc(&tcon->num_deletes);
- }
-#endif
cifs_buf_release(pSMB);
if (rc == -EAGAIN)
pSMB->ByteCount = cpu_to_le16(name_len + 1);
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_rmdirs);
if (rc) {
cFYI(1, ("Error in RMDir = %d", rc));
}
-#ifdef CONFIG_CIFS_STATS
- else {
- atomic_inc(&tcon->num_rmdirs);
- }
-#endif
cifs_buf_release(pSMB);
if (rc == -EAGAIN)
pSMB->ByteCount = cpu_to_le16(name_len + 1);
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_mkdirs);
if (rc) {
cFYI(1, ("Error in Mkdir = %d", rc));
}
-#ifdef CONFIG_CIFS_STATS
- else {
- atomic_inc(&tcon->num_mkdirs);
- }
-#endif
+
cifs_buf_release(pSMB);
if (rc == -EAGAIN)
goto MkDirRetry;
return rc;
}
+static __u16 convert_disposition(int disposition)
+{
+ __u16 ofun = 0;
+
+ switch (disposition) {
+ case FILE_SUPERSEDE:
+ ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
+ break;
+ case FILE_OPEN:
+ ofun = SMBOPEN_OAPPEND;
+ break;
+ case FILE_CREATE:
+ ofun = SMBOPEN_OCREATE;
+ break;
+ case FILE_OPEN_IF:
+ ofun = SMBOPEN_OCREATE | SMBOPEN_OAPPEND;
+ break;
+ case FILE_OVERWRITE:
+ ofun = SMBOPEN_OTRUNC;
+ break;
+ case FILE_OVERWRITE_IF:
+ ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
+ break;
+ default:
+ cFYI(1,("unknown disposition %d",disposition));
+ ofun = SMBOPEN_OAPPEND; /* regular open */
+ }
+ return ofun;
+}
+
+int
+SMBLegacyOpen(const int xid, struct cifsTconInfo *tcon,
+ const char *fileName, const int openDisposition,
+ const int access_flags, const int create_options, __u16 * netfid,
+ int *pOplock, FILE_ALL_INFO * pfile_info,
+ const struct nls_table *nls_codepage, int remap)
+{
+ int rc = -EACCES;
+ OPENX_REQ *pSMB = NULL;
+ OPENX_RSP *pSMBr = NULL;
+ int bytes_returned;
+ int name_len;
+ __u16 count;
+
+OldOpenRetry:
+ rc = smb_init(SMB_COM_OPEN_ANDX, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ pSMB->AndXCommand = 0xFF; /* none */
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ count = 1; /* account for one byte pad to word boundary */
+ name_len =
+ cifsConvertToUCS((__le16 *) (pSMB->fileName + 1),
+ fileName, PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else { /* BB improve check for buffer overruns BB */
+ count = 0; /* no pad */
+ name_len = strnlen(fileName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->fileName, fileName, name_len);
+ }
+ if (*pOplock & REQ_OPLOCK)
+ pSMB->OpenFlags = cpu_to_le16(REQ_OPLOCK);
+ else if (*pOplock & REQ_BATCHOPLOCK) {
+ pSMB->OpenFlags = cpu_to_le16(REQ_BATCHOPLOCK);
+ }
+ pSMB->OpenFlags |= cpu_to_le16(REQ_MORE_INFO);
+ /* BB fixme add conversion for access_flags to bits 0 - 2 of mode */
+ /* 0 = read
+ 1 = write
+ 2 = rw
+ 3 = execute
+ */
+ pSMB->Mode = cpu_to_le16(2);
+ pSMB->Mode |= cpu_to_le16(0x40); /* deny none */
+ /* set file as system file if special file such
+ as fifo and server expecting SFU style and
+ no Unix extensions */
+
+ if(create_options & CREATE_OPTION_SPECIAL)
+ pSMB->FileAttributes = cpu_to_le16(ATTR_SYSTEM);
+ else
+ pSMB->FileAttributes = cpu_to_le16(0/*ATTR_NORMAL*/); /* BB FIXME */
+
+ /* if ((omode & S_IWUGO) == 0)
+ pSMB->FileAttributes |= cpu_to_le32(ATTR_READONLY);*/
+ /* Above line causes problems due to vfs splitting create into two
+ pieces - need to set mode after file created not while it is
+ being created */
+
+ /* BB FIXME BB */
+/* pSMB->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK); */
+ /* BB FIXME END BB */
+
+ pSMB->Sattr = cpu_to_le16(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_DIRECTORY);
+ pSMB->OpenFunction = cpu_to_le16(convert_disposition(openDisposition));
+ count += name_len;
+ pSMB->hdr.smb_buf_length += count;
+
+ pSMB->ByteCount = cpu_to_le16(count);
+ /* long_op set to 1 to allow for oplock break timeouts */
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 1);
+ cifs_stats_inc(&tcon->num_opens);
+ if (rc) {
+ cFYI(1, ("Error in Open = %d", rc));
+ } else {
+ /* BB verify if wct == 15 */
+
+/* *pOplock = pSMBr->OplockLevel; */ /* BB take from action field BB */
+
+ *netfid = pSMBr->Fid; /* cifs fid stays in le */
+ /* Let caller know file was created so we can set the mode. */
+ /* Do we care about the CreateAction in any other cases? */
+ /* BB FIXME BB */
+/* if(cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction)
+ *pOplock |= CIFS_CREATE_ACTION; */
+ /* BB FIXME END */
+
+ if(pfile_info) {
+ pfile_info->CreationTime = 0; /* BB convert CreateTime*/
+ pfile_info->LastAccessTime = 0; /* BB fixme */
+ pfile_info->LastWriteTime = 0; /* BB fixme */
+ pfile_info->ChangeTime = 0; /* BB fixme */
+ pfile_info->Attributes =
+ cpu_to_le32(le16_to_cpu(pSMBr->FileAttributes));
+ /* the file_info buf is endian converted by caller */
+ pfile_info->AllocationSize =
+ cpu_to_le64(le32_to_cpu(pSMBr->EndOfFile));
+ pfile_info->EndOfFile = pfile_info->AllocationSize;
+ pfile_info->NumberOfLinks = cpu_to_le32(1);
+ }
+ }
+
+ cifs_buf_release(pSMB);
+ if (rc == -EAGAIN)
+ goto OldOpenRetry;
+ return rc;
+}
+
int
CIFSSMBOpen(const int xid, struct cifsTconInfo *tcon,
const char *fileName, const int openDisposition,
}
pSMB->DesiredAccess = cpu_to_le32(access_flags);
pSMB->AllocationSize = 0;
- pSMB->FileAttributes = cpu_to_le32(ATTR_NORMAL);
+ /* set file as system file if special file such
+ as fifo and server expecting SFU style and
+ no Unix extensions */
+ if(create_options & CREATE_OPTION_SPECIAL)
+ pSMB->FileAttributes = cpu_to_le32(ATTR_SYSTEM);
+ else
+ pSMB->FileAttributes = cpu_to_le32(ATTR_NORMAL);
/* XP does not handle ATTR_POSIX_SEMANTICS */
/* but it helps speed up case sensitive checks for other
servers such as Samba */
being created */
pSMB->ShareAccess = cpu_to_le32(FILE_SHARE_ALL);
pSMB->CreateDisposition = cpu_to_le32(openDisposition);
- pSMB->CreateOptions = cpu_to_le32(create_options);
+ pSMB->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK);
/* BB Expirement with various impersonation levels and verify */
pSMB->ImpersonationLevel = cpu_to_le32(SECURITY_IMPERSONATION);
pSMB->SecurityFlags =
/* long_op set to 1 to allow for oplock break timeouts */
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 1);
+ cifs_stats_inc(&tcon->num_opens);
if (rc) {
cFYI(1, ("Error in Open = %d", rc));
} else {
pfile_info->EndOfFile = pSMBr->EndOfFile;
pfile_info->NumberOfLinks = cpu_to_le32(1);
}
-
-#ifdef CONFIG_CIFS_STATS
- atomic_inc(&tcon->num_opens);
-#endif
}
+
cifs_buf_release(pSMB);
if (rc == -EAGAIN)
goto openRetry;
READ_RSP *pSMBr = NULL;
char *pReadData = NULL;
int bytes_returned;
+ int wct;
cFYI(1,("Reading %d bytes on fid %d",count,netfid));
+ if(tcon->ses->capabilities & CAP_LARGE_FILES)
+ wct = 12;
+ else
+ wct = 10; /* old style read */
*nbytes = 0;
- rc = smb_init(SMB_COM_READ_ANDX, 12, tcon, (void **) &pSMB,
+ rc = smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **) &pSMB,
(void **) &pSMBr);
if (rc)
return rc;
pSMB->AndXCommand = 0xFF; /* none */
pSMB->Fid = netfid;
pSMB->OffsetLow = cpu_to_le32(lseek & 0xFFFFFFFF);
- pSMB->OffsetHigh = cpu_to_le32(lseek >> 32);
+ if(wct == 12)
+ pSMB->OffsetHigh = cpu_to_le32(lseek >> 32);
+ else if((lseek >> 32) > 0) /* can not handle this big offset for old */
+ return -EIO;
+
pSMB->Remaining = 0;
pSMB->MaxCount = cpu_to_le16(count & 0xFFFF);
pSMB->MaxCountHigh = cpu_to_le32(count >> 16);
- pSMB->ByteCount = 0; /* no need to do le conversion since it is 0 */
-
+ if(wct == 12)
+ pSMB->ByteCount = 0; /* no need to do le conversion since 0 */
+ else {
+ /* old style read */
+ struct smb_com_readx_req * pSMBW =
+ (struct smb_com_readx_req *)pSMB;
+ pSMBW->ByteCount = 0;
+ }
+
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_reads);
if (rc) {
cERROR(1, ("Send error in read = %d", rc));
} else {
int rc = -EACCES;
WRITE_REQ *pSMB = NULL;
WRITE_RSP *pSMBr = NULL;
- int bytes_returned;
+ int bytes_returned, wct;
__u32 bytes_sent;
__u16 byte_count;
/* cFYI(1,("write at %lld %d bytes",offset,count));*/
- rc = smb_init(SMB_COM_WRITE_ANDX, 14, tcon, (void **) &pSMB,
+ if(tcon->ses == NULL)
+ return -ECONNABORTED;
+
+ if(tcon->ses->capabilities & CAP_LARGE_FILES)
+ wct = 14;
+ else
+ wct = 12;
+
+ rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB,
(void **) &pSMBr);
if (rc)
return rc;
pSMB->AndXCommand = 0xFF; /* none */
pSMB->Fid = netfid;
pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
- pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+ if(wct == 14)
+ pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+ else if((offset >> 32) > 0) /* can not handle this big offset for old */
+ return -EIO;
+
pSMB->Reserved = 0xFFFFFFFF;
pSMB->WriteMode = 0;
pSMB->Remaining = 0;
if (bytes_sent > count)
bytes_sent = count;
pSMB->DataOffset =
- cpu_to_le16(offsetof(struct smb_com_write_req,Data) - 4);
+ cpu_to_le16(offsetof(struct smb_com_write_req,Data) - 4);
if(buf)
memcpy(pSMB->Data,buf,bytes_sent);
else if(ubuf) {
cifs_buf_release(pSMB);
return -EFAULT;
}
- } else {
+ } else if (count != 0) {
/* No buffer */
cifs_buf_release(pSMB);
return -EINVAL;
+ } /* else setting file size with write of zero bytes */
+ if(wct == 14)
+ byte_count = bytes_sent + 1; /* pad */
+ else /* wct == 12 */ {
+ byte_count = bytes_sent + 5; /* bigger pad, smaller smb hdr */
}
-
- byte_count = bytes_sent + 1 /* pad */ ; /* BB fix this for sends > 64K */
pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF);
pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16);
- pSMB->hdr.smb_buf_length += bytes_sent+1;
- pSMB->ByteCount = cpu_to_le16(byte_count);
+ pSMB->hdr.smb_buf_length += byte_count;
+
+ if(wct == 14)
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ else { /* old style write has byte count 4 bytes earlier so 4 bytes pad */
+ struct smb_com_writex_req * pSMBW =
+ (struct smb_com_writex_req *)pSMB;
+ pSMBW->ByteCount = cpu_to_le16(byte_count);
+ }
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, long_op);
+ cifs_stats_inc(&tcon->num_writes);
if (rc) {
cFYI(1, ("Send error in write = %d", rc));
*nbytes = 0;
}
#ifdef CONFIG_CIFS_EXPERIMENTAL
-int CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
+int
+CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
const int netfid, const unsigned int count,
- const __u64 offset, unsigned int *nbytes, const char __user *buf,
- const int long_op)
+ const __u64 offset, unsigned int *nbytes, struct kvec *iov,
+ int n_vec, const int long_op)
{
int rc = -EACCES;
WRITE_REQ *pSMB = NULL;
- WRITE_RSP *pSMBr = NULL;
- /*int bytes_returned;*/
- unsigned bytes_sent;
- __u16 byte_count;
+ int bytes_returned, wct;
+ int smb_hdr_len;
- rc = small_smb_init(SMB_COM_WRITE_ANDX, 14, tcon, (void **) &pSMB);
-
+ cFYI(1,("write2 at %lld %d bytes",offset,count)); /* BB removeme BB */
+ if(tcon->ses->capabilities & CAP_LARGE_FILES)
+ wct = 14;
+ else
+ wct = 12;
+ rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB);
if (rc)
return rc;
-
- pSMBr = (WRITE_RSP *)pSMB; /* BB removeme BB */
-
/* tcon and ses pointer are checked in smb_init */
if (tcon->ses->server == NULL)
return -ECONNABORTED;
- pSMB->AndXCommand = 0xFF; /* none */
+ pSMB->AndXCommand = 0xFF; /* none */
pSMB->Fid = netfid;
pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
- pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+ if(wct == 14)
+ pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+ else if((offset >> 32) > 0) /* can not handle this big offset for old */
+ return -EIO;
pSMB->Reserved = 0xFFFFFFFF;
pSMB->WriteMode = 0;
pSMB->Remaining = 0;
- bytes_sent = (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & ~0xFF;
- if (bytes_sent > count)
- bytes_sent = count;
- pSMB->DataLengthHigh = 0;
+
pSMB->DataOffset =
cpu_to_le16(offsetof(struct smb_com_write_req,Data) - 4);
- byte_count = bytes_sent + 1 /* pad */ ;
- pSMB->DataLengthLow = cpu_to_le16(bytes_sent);
- pSMB->DataLengthHigh = 0;
- pSMB->hdr.smb_buf_length += byte_count;
- pSMB->ByteCount = cpu_to_le16(byte_count);
+ pSMB->DataLengthLow = cpu_to_le16(count & 0xFFFF);
+ pSMB->DataLengthHigh = cpu_to_le16(count >> 16);
+ smb_hdr_len = pSMB->hdr.smb_buf_length + 1; /* hdr + 1 byte pad */
+ if(wct == 14)
+ pSMB->hdr.smb_buf_length += count+1;
+ else /* wct == 12 */
+ pSMB->hdr.smb_buf_length += count+5; /* smb data starts later */
+ if(wct == 14)
+ pSMB->ByteCount = cpu_to_le16(count + 1);
+ else /* wct == 12 */ /* bigger pad, smaller smb hdr, keep offset ok */ {
+ struct smb_com_writex_req * pSMBW =
+ (struct smb_com_writex_req *)pSMB;
+ pSMBW->ByteCount = cpu_to_le16(count + 5);
+ }
+ iov[0].iov_base = pSMB;
+ iov[0].iov_len = smb_hdr_len + 4;
-/* rc = SendReceive2(xid, tcon->ses, (struct smb_hdr *) pSMB,
- (struct smb_hdr *) pSMBr, buf, buflen, &bytes_returned, long_op); */ /* BB fixme BB */
+ rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &bytes_returned,
+ long_op);
+ cifs_stats_inc(&tcon->num_writes);
if (rc) {
- cFYI(1, ("Send error in write2 (large write) = %d", rc));
+ cFYI(1, ("Send error Write2 = %d", rc));
*nbytes = 0;
- } else
- *nbytes = le16_to_cpu(pSMBr->Count);
+ } else {
+ WRITE_RSP * pSMBr = (WRITE_RSP *)pSMB;
+ *nbytes = le16_to_cpu(pSMBr->CountHigh);
+ *nbytes = (*nbytes) << 16;
+ *nbytes += le16_to_cpu(pSMBr->Count);
+ }
cifs_small_buf_release(pSMB);
return rc;
}
+
+
#endif /* CIFS_EXPERIMENTAL */
int
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, timeout);
-
+ cifs_stats_inc(&tcon->num_locks);
if (rc) {
cFYI(1, ("Send error in Lock = %d", rc));
}
pSMB->ByteCount = 0;
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_closes);
if (rc) {
if(rc!=-EINTR) {
/* EINTR is expected when user ctl-c to kill app */
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_renames);
if (rc) {
cFYI(1, ("Send error in rename = %d", rc));
}
-#ifdef CONFIG_CIFS_STATS
- else {
- atomic_inc(&tcon->num_renames);
- }
-#endif
-
cifs_buf_release(pSMB);
if (rc == -EAGAIN)
pSMB->ByteCount = cpu_to_le16(byte_count);
rc = SendReceive(xid, pTcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&pTcon->num_t2renames);
if (rc) {
cFYI(1,("Send error in Rename (by file handle) = %d", rc));
}
-#ifdef CONFIG_CIFS_STATS
- else {
- atomic_inc(&pTcon->num_t2renames);
- }
-#endif
+
cifs_buf_release(pSMB);
/* Note: On -EAGAIN error only caller can retry on handle based calls
pSMB->ByteCount = cpu_to_le16(byte_count);
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_symlinks);
if (rc) {
cFYI(1,
("Send error in SetPathInfo (create symlink) = %d",
pSMB->ByteCount = cpu_to_le16(byte_count);
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_hardlinks);
if (rc) {
cFYI(1, ("Send error in SetPathInfo (hard link) = %d", rc));
}
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_hardlinks);
if (rc) {
cFYI(1, ("Send error in hard link (NT rename) = %d", rc));
}
}
}
qreparse_out:
- if (pSMB)
- cifs_buf_release(pSMB);
+ cifs_buf_release(pSMB);
/* Note: On -EAGAIN error only caller can retry on handle based calls
since file handle passed in no longer valid */
#endif /* CONFIG_POSIX */
+/* Legacy Query Path Information call for lookup to old servers such
+ as Win9x/WinME */
+int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon,
+ const unsigned char *searchName,
+ FILE_ALL_INFO * pFinfo,
+ const struct nls_table *nls_codepage, int remap)
+{
+ QUERY_INFORMATION_REQ * pSMB;
+ QUERY_INFORMATION_RSP * pSMBr;
+ int rc = 0;
+ int bytes_returned;
+ int name_len;
+
+ cFYI(1, ("In SMBQPath path %s", searchName));
+QInfRetry:
+ rc = smb_init(SMB_COM_QUERY_INFORMATION, 0, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
+ name_len =
+ cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
+ PATH_MAX, nls_codepage, remap);
+ name_len++; /* trailing null */
+ name_len *= 2;
+ } else {
+ name_len = strnlen(searchName, PATH_MAX);
+ name_len++; /* trailing null */
+ strncpy(pSMB->FileName, searchName, name_len);
+ }
+ pSMB->BufferFormat = 0x04;
+ name_len++; /* account for buffer type byte */
+ pSMB->hdr.smb_buf_length += (__u16) name_len;
+ pSMB->ByteCount = cpu_to_le16(name_len);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cFYI(1, ("Send error in QueryInfo = %d", rc));
+ } else if (pFinfo) { /* decode response */
+ memset(pFinfo, 0, sizeof(FILE_ALL_INFO));
+ pFinfo->AllocationSize =
+ cpu_to_le64(le32_to_cpu(pSMBr->size));
+ pFinfo->EndOfFile = pFinfo->AllocationSize;
+ pFinfo->Attributes =
+ cpu_to_le32(le16_to_cpu(pSMBr->attr));
+ } else
+ rc = -EIO; /* bad buffer passed in */
+
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto QInfRetry;
+
+ return rc;
+}
+
+
+
+
int
CIFSSMBQPathInfo(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName,
if (rc) {
cFYI(1, ("Send error in FindFileDirInfo = %d", rc));
} else { /* decode response */
-
+ cifs_stats_inc(&tcon->num_ffirst);
/* BB fill in */
}
const char *searchName,
const struct nls_table *nls_codepage,
__u16 * pnetfid,
- struct cifs_search_info * psrch_inf, int remap)
+ struct cifs_search_info * psrch_inf, int remap, const char dirsep)
{
/* level 257 SMB_ */
TRANSACTION2_FFIRST_REQ *pSMB = NULL;
it got remapped to 0xF03A as if it were part of the
directory name instead of a wildcard */
name_len *= 2;
- pSMB->FileName[name_len] = '\\';
+ pSMB->FileName[name_len] = dirsep;
pSMB->FileName[name_len+1] = 0;
pSMB->FileName[name_len+2] = '*';
pSMB->FileName[name_len+3] = 0;
if(name_len > buffersize-header)
free buffer exit; BB */
strncpy(pSMB->FileName, searchName, name_len);
- pSMB->FileName[name_len] = '\\';
+ pSMB->FileName[name_len] = dirsep;
pSMB->FileName[name_len+1] = '*';
pSMB->FileName[name_len+2] = 0;
name_len += 3;
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ cifs_stats_inc(&tcon->num_ffirst);
if (rc) {/* BB add logic to retry regular search if Unix search rejected unexpectedly by server */
/* BB Add code to handle unsupported level rc */
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
-
+ cifs_stats_inc(&tcon->num_fnext);
if (rc) {
if (rc == -EBADF) {
psrch_inf->endOfSearch = TRUE;
if (rc) {
cERROR(1, ("Send error in FindClose = %d", rc));
}
+ cifs_stats_inc(&tcon->num_fclose);
cifs_small_buf_release(pSMB);
/* Since session is dead, search handle closed on server already */
(void **) &pSMBr);
if (rc)
return rc;
-
+
+ /* server pointer checked in called function,
+ but should never be null here anyway */
+ pSMB->hdr.Mid = GetNextMid(ses->server);
pSMB->hdr.Tid = ses->ipc_tid;
pSMB->hdr.Uid = ses->Suid;
if (ses->capabilities & CAP_STATUS32) {
return rc;
}
+/* Query File System Info such as free space to old servers such as Win 9x */
+int
+SMBOldQFSInfo(const int xid, struct cifsTconInfo *tcon, struct kstatfs *FSData)
+{
+/* level 0x01 SMB_QUERY_FILE_SYSTEM_INFO */
+ TRANSACTION2_QFSI_REQ *pSMB = NULL;
+ TRANSACTION2_QFSI_RSP *pSMBr = NULL;
+ FILE_SYSTEM_ALLOC_INFO *response_data;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, byte_count;
+
+ cFYI(1, ("OldQFSInfo"));
+oldQFSInfoRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 2; /* level */
+ pSMB->TotalDataCount = 0;
+ pSMB->MaxParameterCount = cpu_to_le16(2);
+ pSMB->MaxDataCount = cpu_to_le16(1000);
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ byte_count = params + 1 /* pad */ ;
+ pSMB->TotalParameterCount = cpu_to_le16(params);
+ pSMB->ParameterCount = pSMB->TotalParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(offsetof(
+ struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
+ pSMB->DataCount = 0;
+ pSMB->DataOffset = 0;
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
+ pSMB->InformationLevel = cpu_to_le16(SMB_INFO_ALLOCATION);
+ pSMB->hdr.smb_buf_length += byte_count;
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cFYI(1, ("Send error in QFSInfo = %d", rc));
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+
+ if (rc || (pSMBr->ByteCount < 18))
+ rc = -EIO; /* bad smb */
+ else {
+ __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+ cFYI(1,("qfsinf resp BCC: %d Offset %d",
+ pSMBr->ByteCount, data_offset));
+
+ response_data =
+ (FILE_SYSTEM_ALLOC_INFO *)
+ (((char *) &pSMBr->hdr.Protocol) + data_offset);
+ FSData->f_bsize =
+ le16_to_cpu(response_data->BytesPerSector) *
+ le32_to_cpu(response_data->
+ SectorsPerAllocationUnit);
+ FSData->f_blocks =
+ le32_to_cpu(response_data->TotalAllocationUnits);
+ FSData->f_bfree = FSData->f_bavail =
+ le32_to_cpu(response_data->FreeAllocationUnits);
+ cFYI(1,
+ ("Blocks: %lld Free: %lld Block size %ld",
+ (unsigned long long)FSData->f_blocks,
+ (unsigned long long)FSData->f_bfree,
+ FSData->f_bsize));
+ }
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto oldQFSInfoRetry;
+
+ return rc;
+}
+
int
CIFSSMBQFSInfo(const int xid, struct cifsTconInfo *tcon, struct kstatfs *FSData)
{
params = 2; /* level */
pSMB->TotalDataCount = 0;
pSMB->MaxParameterCount = cpu_to_le16(2);
- pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->MaxDataCount = cpu_to_le16(1000);
pSMB->MaxSetupCount = 0;
pSMB->Reserved = 0;
pSMB->Flags = 0;
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
if (rc) {
- cERROR(1, ("Send error in QFSInfo = %d", rc));
+ cFYI(1, ("Send error in QFSInfo = %d", rc));
} else { /* decode response */
rc = validate_t2((struct smb_t2_rsp *)pSMBr);
- if (rc || (pSMBr->ByteCount < 24)) /* BB alsO CHEck enough total bytes returned */
+ if (rc || (pSMBr->ByteCount < 24))
rc = -EIO; /* bad smb */
else {
__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
- cFYI(1,
- ("Decoding qfsinfo response. BCC: %d Offset %d",
- pSMBr->ByteCount, data_offset));
response_data =
(FILE_SYSTEM_INFO
return rc;
}
+int
+CIFSSMBSetFSUnixInfo(const int xid, struct cifsTconInfo *tcon, __u64 cap)
+{
+/* level 0x200 SMB_SET_CIFS_UNIX_INFO */
+ TRANSACTION2_SETFSI_REQ *pSMB = NULL;
+ TRANSACTION2_SETFSI_RSP *pSMBr = NULL;
+ int rc = 0;
+ int bytes_returned = 0;
+ __u16 params, param_offset, offset, byte_count;
+
+ cFYI(1, ("In SETFSUnixInfo"));
+SETFSUnixRetry:
+ rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
+ (void **) &pSMBr);
+ if (rc)
+ return rc;
+
+ params = 4; /* 2 bytes zero followed by info level. */
+ pSMB->MaxSetupCount = 0;
+ pSMB->Reserved = 0;
+ pSMB->Flags = 0;
+ pSMB->Timeout = 0;
+ pSMB->Reserved2 = 0;
+ param_offset = offsetof(struct smb_com_transaction2_setfsi_req, FileNum) - 4;
+ offset = param_offset + params;
+
+ pSMB->MaxParameterCount = cpu_to_le16(4);
+ pSMB->MaxDataCount = cpu_to_le16(100); /* BB find exact max SMB PDU from sess structure BB */
+ pSMB->SetupCount = 1;
+ pSMB->Reserved3 = 0;
+ pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FS_INFORMATION);
+ byte_count = 1 /* pad */ + params + 12;
+
+ pSMB->DataCount = cpu_to_le16(12);
+ pSMB->ParameterCount = cpu_to_le16(params);
+ pSMB->TotalDataCount = pSMB->DataCount;
+ pSMB->TotalParameterCount = pSMB->ParameterCount;
+ pSMB->ParameterOffset = cpu_to_le16(param_offset);
+ pSMB->DataOffset = cpu_to_le16(offset);
+
+ /* Params. */
+ pSMB->FileNum = 0;
+ pSMB->InformationLevel = cpu_to_le16(SMB_SET_CIFS_UNIX_INFO);
+
+ /* Data. */
+ pSMB->ClientUnixMajor = cpu_to_le16(CIFS_UNIX_MAJOR_VERSION);
+ pSMB->ClientUnixMinor = cpu_to_le16(CIFS_UNIX_MINOR_VERSION);
+ pSMB->ClientUnixCap = cpu_to_le64(cap);
+
+ pSMB->hdr.smb_buf_length += byte_count;
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+ (struct smb_hdr *) pSMBr, &bytes_returned, 0);
+ if (rc) {
+ cERROR(1, ("Send error in SETFSUnixInfo = %d", rc));
+ } else { /* decode response */
+ rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+ if (rc) {
+ rc = -EIO; /* bad smb */
+ }
+ }
+ cifs_buf_release(pSMB);
+
+ if (rc == -EAGAIN)
+ goto SETFSUnixRetry;
+
+ return rc;
+}
+
+
int
CIFSSMBQFSPosixInfo(const int xid, struct cifsTconInfo *tcon,
le64_to_cpu(response_data->TotalBlocks);
FSData->f_bfree =
le64_to_cpu(response_data->BlocksAvail);
- if(response_data->UserBlocksAvail == -1) {
+ if(response_data->UserBlocksAvail == cpu_to_le64(-1)) {
FSData->f_bavail = FSData->f_bfree;
} else {
FSData->f_bavail =
le64_to_cpu(response_data->UserBlocksAvail);
}
- if(response_data->TotalFileNodes != -1)
+ if(response_data->TotalFileNodes != cpu_to_le64(-1))
FSData->f_files =
le64_to_cpu(response_data->TotalFileNodes);
- if(response_data->FreeFileNodes != -1)
+ if(response_data->FreeFileNodes != cpu_to_le64(-1))
FSData->f_ffree =
le64_to_cpu(response_data->FreeFileNodes);
}
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
- } else { /* BB improve the check for buffer overruns BB */
+ } else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fileName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, fileName, name_len);
params = 6 + name_len;
data_count = sizeof (struct file_end_of_file_info);
pSMB->MaxParameterCount = cpu_to_le16(2);
- pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB size from sess */
+ pSMB->MaxDataCount = cpu_to_le16(4100);
pSMB->MaxSetupCount = 0;
pSMB->Reserved = 0;
pSMB->Flags = 0;
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
- } else { /* BB improve the check for buffer overruns BB */
+ } else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fileName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, fileName, name_len);
}
int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
- const int notify_subdirs, const __u16 netfid,
- __u32 filter, const struct nls_table *nls_codepage)
+ const int notify_subdirs, const __u16 netfid,
+ __u32 filter, struct file * pfile, int multishot,
+ const struct nls_table *nls_codepage)
{
int rc = 0;
struct smb_com_transaction_change_notify_req * pSMB = NULL;
struct smb_com_transaction_change_notify_rsp * pSMBr = NULL;
+ struct dir_notify_req *dnotify_req;
int bytes_returned;
cFYI(1, ("In CIFSSMBNotify for file handle %d",(int)netfid));
(struct smb_hdr *) pSMBr, &bytes_returned, -1);
if (rc) {
cFYI(1, ("Error in Notify = %d", rc));
+ } else {
+ /* Add file to outstanding requests */
+ /* BB change to kmem cache alloc */
+ dnotify_req = (struct dir_notify_req *) kmalloc(
+ sizeof(struct dir_notify_req),
+ GFP_KERNEL);
+ if(dnotify_req) {
+ dnotify_req->Pid = pSMB->hdr.Pid;
+ dnotify_req->PidHigh = pSMB->hdr.PidHigh;
+ dnotify_req->Mid = pSMB->hdr.Mid;
+ dnotify_req->Tid = pSMB->hdr.Tid;
+ dnotify_req->Uid = pSMB->hdr.Uid;
+ dnotify_req->netfid = netfid;
+ dnotify_req->pfile = pfile;
+ dnotify_req->filter = filter;
+ dnotify_req->multishot = multishot;
+ spin_lock(&GlobalMid_Lock);
+ list_add_tail(&dnotify_req->lhead,
+ &GlobalDnotifyReqList);
+ spin_unlock(&GlobalMid_Lock);
+ } else
+ rc = -ENOMEM;
}
cifs_buf_release(pSMB);
return rc;
#include <linux/utsname.h>
#include <linux/mempool.h>
#include <linux/delay.h>
+#include <linux/completion.h>
+#include <linux/pagevec.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
#include "cifspdu.h"
#define CIFS_PORT 445
#define RFC1001_PORT 139
+static DECLARE_COMPLETION(cifsd_complete);
+
extern void SMBencrypt(unsigned char *passwd, unsigned char *c8,
unsigned char *p24);
extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
char *in6_addr; /* ipv6 address as human readable form of in6_addr */
char *iocharset; /* local code page for mapping to and from Unicode */
char source_rfc1001_name[16]; /* netbios name of client */
+ char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
uid_t linux_uid;
gid_t linux_gid;
mode_t file_mode;
unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
unsigned direct_io:1;
unsigned remap:1; /* set to remap seven reserved chars in filenames */
+ unsigned posix_paths:1; /* unset to not ask for posix pathnames. */
+ unsigned sfu_emul:1;
+ unsigned nocase; /* request case insensitive filenames */
+ unsigned nobrl; /* disable sending byte range locks to srv */
unsigned int rsize;
unsigned int wsize;
unsigned int sockopt;
static int ipv4_connect(struct sockaddr_in *psin_server,
struct socket **csocket,
- char * netb_name);
+ char * netb_name,
+ char * server_netb_name);
static int ipv6_connect(struct sockaddr_in6 *psin_server,
struct socket **csocket);
} else {
rc = ipv4_connect(&server->addr.sockAddr,
&server->ssocket,
- server->workstation_RFC1001_name);
+ server->workstation_RFC1001_name,
+ server->server_RFC1001_name);
}
if(rc) {
+ cFYI(1,("reconnect error %d",rc));
msleep(3000);
} else {
atomic_inc(&tcpSesReconnectCount);
byte_count += total_in_buf2;
BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
- byte_count = be32_to_cpu(pTargetSMB->smb_buf_length);
+ byte_count = pTargetSMB->smb_buf_length;
byte_count += total_in_buf2;
/* BB also add check that we are not beyond maximum buffer size */
- pTargetSMB->smb_buf_length = cpu_to_be32(byte_count);
+ pTargetSMB->smb_buf_length = byte_count;
if(remaining == total_in_buf2) {
cFYI(1,("found the last secondary response"));
struct cifsSesInfo *ses;
struct task_struct *task_to_wake = NULL;
struct mid_q_entry *mid_entry;
- char *temp;
+ char temp;
int isLargeBuf = FALSE;
int isMultiRsp;
int reconnect;
atomic_inc(&tcpSesAllocCount);
length = tcpSesAllocCount.counter;
write_unlock(&GlobalSMBSeslock);
+ complete(&cifsd_complete);
if(length > 1) {
mempool_resize(cifs_req_poolp,
length + cifs_min_rcv,
continue;
}
- /* the right amount was read from socket - 4 bytes */
+ /* The right amount was read from socket - 4 bytes */
+ /* so we can now interpret the length field */
+
+ /* the first byte big endian of the length field,
+ is actually not part of the length but the type
+ with the most common, zero, as regular data */
+ temp = *((char *) smb_buffer);
+ /* Note that FC 1001 length is big endian on the wire,
+ but we convert it here so it is always manipulated
+ as host byte order */
pdu_length = ntohl(smb_buffer->smb_buf_length);
- cFYI(1,("rfc1002 length(big endian)0x%x)", pdu_length+4));
+ smb_buffer->smb_buf_length = pdu_length;
+
+ cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
- temp = (char *) smb_buffer;
- if (temp[0] == (char) RFC1002_SESSION_KEEP_ALIVE) {
+ if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
continue;
- } else if (temp[0] == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
+ } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
cFYI(1,("Good RFC 1002 session rsp"));
continue;
- } else if (temp[0] == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
+ } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
/* we get this from Windows 98 instead of
an error on SMB negprot response */
cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
- temp[4]));
+ pdu_length));
if(server->tcpStatus == CifsNew) {
/* if nack on negprot (rather than
ret of smb negprot error) reconnecting
wake_up(&server->response_q);
continue;
}
- } else if (temp[0] != (char) 0) {
+ } else if (temp != (char) 0) {
cERROR(1,("Unknown RFC 1002 frame"));
- cifs_dump_mem(" Received Data: ", temp, length);
+ cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
+ length);
cifs_reconnect(server);
csocket = server->ssocket;
continue;
dump_smb(smb_buffer, length);
if (checkSMB (smb_buffer, smb_buffer->Mid, total_read+4)) {
- cERROR(1, ("Bad SMB Received "));
+ cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
continue;
}
multi_t2_fnd:
task_to_wake = mid_entry->tsk;
mid_entry->midState = MID_RESPONSE_RECEIVED;
+#ifdef CONFIG_CIFS_STATS2
+ mid_entry->when_received = jiffies;
+#endif
break;
}
}
} else if ((is_valid_oplock_break(smb_buffer) == FALSE)
&& (isMultiRsp == FALSE)) {
cERROR(1, ("No task to wake, unknown frame rcvd!"));
- cifs_dump_mem("Received Data is: ",temp,sizeof(struct smb_hdr));
+ cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
+ sizeof(struct smb_hdr));
}
} /* end while !EXITING */
msleep(125);
}
- if (list_empty(&server->pending_mid_q)) {
+ if (!list_empty(&server->pending_mid_q)) {
/* mpx threads have not exited yet give them
at least the smb send timeout time for long ops */
/* due to delays on oplock break requests, we need
GFP_KERNEL);
}
- msleep(250);
+ complete_and_exit(&cifsd_complete, 0);
return 0;
}
toupper(system_utsname.nodename[i]);
}
vol->source_rfc1001_name[15] = 0;
-
+ /* null target name indicates to use *SMBSERVR default called name
+ if we end up sending RFC1001 session initialize */
+ vol->target_rfc1001_name[0] = 0;
vol->linux_uid = current->uid; /* current->euid instead? */
vol->linux_gid = current->gid;
vol->dir_mode = S_IRWXUGO;
/* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
vol->rw = TRUE;
+ /* default is always to request posix paths. */
+ vol->posix_paths = 1;
+
if (!options)
return 1;
/* The string has 16th byte zero still from
set at top of the function */
if((i==15) && (value[i] != 0))
- printk(KERN_WARNING "CIFS: netbiosname longer than 15 and was truncated.\n");
+ printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
+ }
+ } else if (strnicmp(data, "servern", 7) == 0) {
+ /* servernetbiosname specified override *SMBSERVER */
+ if (!value || !*value || (*value == ' ')) {
+ cFYI(1,("empty server netbiosname specified"));
+ } else {
+ /* last byte, type, is 0x20 for servr type */
+ memset(vol->target_rfc1001_name,0x20,16);
+
+ for(i=0;i<15;i++) {
+ /* BB are there cases in which a comma can be
+ valid in this workstation netbios name (and need
+ special handling)? */
+
+ /* user or mount helper must uppercase netbiosname */
+ if (value[i]==0)
+ break;
+ else
+ vol->target_rfc1001_name[i] = value[i];
+ }
+ /* The string has 16th byte zero still from
+ set at top of the function */
+ if((i==15) && (value[i] != 0))
+ printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
}
} else if (strnicmp(data, "credentials", 4) == 0) {
/* ignore */
vol->remap = 1;
} else if (strnicmp(data, "nomapchars", 10) == 0) {
vol->remap = 0;
+ } else if (strnicmp(data, "sfu", 3) == 0) {
+ vol->sfu_emul = 1;
+ } else if (strnicmp(data, "nosfu", 5) == 0) {
+ vol->sfu_emul = 0;
+ } else if (strnicmp(data, "posixpaths", 10) == 0) {
+ vol->posix_paths = 1;
+ } else if (strnicmp(data, "noposixpaths", 12) == 0) {
+ vol->posix_paths = 0;
+ } else if ((strnicmp(data, "nocase", 6) == 0) ||
+ (strnicmp(data, "ignorecase", 10) == 0)) {
+ vol->nocase = 1;
+ } else if (strnicmp(data, "brl", 3) == 0) {
+ vol->nobrl = 0;
+ } else if ((strnicmp(data, "nobrl", 5) == 0) ||
+ (strnicmp(data, "nolock", 6) == 0)) {
+ vol->nobrl = 1;
+ /* turn off mandatory locking in mode
+ if remote locking is turned off since the
+ local vfs will do advisory */
+ if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
+ vol->file_mode = S_IALLUGO;
} else if (strnicmp(data, "setuids", 7) == 0) {
vol->setuids = 1;
} else if (strnicmp(data, "nosetuids", 9) == 0) {
static int
ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
- char * netbios_name)
+ char * netbios_name, char * target_name)
{
int rc = 0;
int connected = 0;
/* Eventually check for other socket options to change from
the default. sock_setsockopt not used because it expects
user space buffer */
+ cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
+ (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
+ /* make the bufsizes depend on wsize/rsize and max requests */
+ if((*csocket)->sk->sk_sndbuf < (200 * 1024))
+ (*csocket)->sk->sk_sndbuf = 200 * 1024;
+ if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
+ (*csocket)->sk->sk_rcvbuf = 140 * 1024;
/* send RFC1001 sessinit */
-
if(psin_server->sin_port == htons(RFC1001_PORT)) {
/* some servers require RFC1001 sessinit before sending
negprot - BB check reconnection in case where second
ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
if(ses_init_buf) {
ses_init_buf->trailer.session_req.called_len = 32;
- rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
- DEFAULT_CIFS_CALLED_NAME,16);
+ if(target_name && (target_name[0] != 0)) {
+ rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
+ target_name, 16);
+ } else {
+ rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
+ DEFAULT_CIFS_CALLED_NAME,16);
+ }
+
ses_init_buf->trailer.session_req.calling_len = 32;
/* calling name ends in null (byte 16) from old smb
convention. */
sin_server.sin_port = htons(volume_info.port);
else
sin_server.sin_port = 0;
- rc = ipv4_connect(&sin_server,&csocket,volume_info.source_rfc1001_name);
+ rc = ipv4_connect(&sin_server,&csocket,
+ volume_info.source_rfc1001_name,
+ volume_info.target_rfc1001_name);
if (rc < 0) {
cERROR(1,
("Error connecting to IPv4 socket. Aborting operation"));
kfree(volume_info.password);
FreeXid(xid);
return rc;
- } else
- rc = 0;
+ }
+ wait_for_completion(&cifsd_complete);
+ rc = 0;
memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
+ memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
srvTcp->sequence_number = 0;
}
}
/* search for existing tcon to this server share */
if (!rc) {
- if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
+ if(volume_info.rsize > CIFSMaxBufSize) {
+ cERROR(1,("rsize %d too large, using MaxBufSize",
+ volume_info.rsize));
+ cifs_sb->rsize = CIFSMaxBufSize;
+ } else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
cifs_sb->rsize = volume_info.rsize;
- else
- cifs_sb->rsize = srvTcp->maxBuf - MAX_CIFS_HDR_SIZE; /* default */
- if((volume_info.wsize) && (volume_info.wsize <= CIFSMaxBufSize))
+ else /* default */
+ cifs_sb->rsize = CIFSMaxBufSize;
+
+ if(volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
+ cERROR(1,("wsize %d too large using 4096 instead",
+ volume_info.wsize));
+ cifs_sb->wsize = 4096;
+ } else if(volume_info.wsize)
cifs_sb->wsize = volume_info.wsize;
else
cifs_sb->wsize = CIFSMaxBufSize; /* default */
if(cifs_sb->rsize < PAGE_CACHE_SIZE) {
- cifs_sb->rsize = PAGE_CACHE_SIZE;
- cERROR(1,("Attempt to set readsize for mount to less than one page (4096)"));
+ cifs_sb->rsize = PAGE_CACHE_SIZE;
+ /* Windows ME does this */
+ cFYI(1,("Attempt to set readsize for mount to less than one page (4096)"));
}
cifs_sb->mnt_uid = volume_info.linux_uid;
cifs_sb->mnt_gid = volume_info.linux_gid;
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
if(volume_info.no_xattr)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
+ if(volume_info.sfu_emul)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
+ if(volume_info.nobrl)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
+
if(volume_info.direct_io) {
- cERROR(1,("mounting share using direct i/o"));
+ cFYI(1,("mounting share using direct i/o"));
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
}
to the same server share the last value passed in
for the retry flag is used */
tcon->retry = volume_info.retry;
+ tcon->nocase = volume_info.nocase;
} else {
tcon = tconInfoAlloc();
if (tcon == NULL)
if (!rc) {
atomic_inc(&pSesInfo->inUse);
tcon->retry = volume_info.retry;
+ tcon->nocase = volume_info.nocase;
}
}
}
spin_lock(&GlobalMid_Lock);
srvTcp->tcpStatus = CifsExiting;
spin_unlock(&GlobalMid_Lock);
- if(srvTcp->tsk)
+ if(srvTcp->tsk) {
send_sig(SIGKILL,srvTcp->tsk,1);
+ wait_for_completion(&cifsd_complete);
+ }
}
/* If find_unc succeeded then rc == 0 so we can not end */
if (tcon) /* up accidently freeing someone elses tcon struct */
temp_rc = CIFSSMBLogoff(xid, pSesInfo);
/* if the socketUseCount is now zero */
if((temp_rc == -ESHUTDOWN) &&
- (pSesInfo->server->tsk))
+ (pSesInfo->server->tsk)) {
send_sig(SIGKILL,pSesInfo->server->tsk,1);
+ wait_for_completion(&cifsd_complete);
+ }
} else
cFYI(1, ("No session or bad tcon"));
sesInfoFree(pSesInfo);
cFYI(1,("server negotiated posix acl support"));
sb->s_flags |= MS_POSIXACL;
}
+
+ /* Try and negotiate POSIX pathnames if we can. */
+ if (volume_info.posix_paths && (CIFS_UNIX_POSIX_PATHNAMES_CAP &
+ le64_to_cpu(tcon->fsUnixInfo.Capability))) {
+ if (!CIFSSMBSetFSUnixInfo(xid, tcon, CIFS_UNIX_POSIX_PATHNAMES_CAP)) {
+ cFYI(1,("negotiated posix pathnames support"));
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS;
+ } else {
+ cFYI(1,("posix pathnames support requested but not supported"));
+ }
+ }
}
}
+ if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
+ cifs_sb->wsize = min(cifs_sb->wsize,
+ (tcon->ses->server->maxBuf -
+ MAX_CIFS_HDR_SIZE));
+ if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
+ cifs_sb->rsize = min(cifs_sb->rsize,
+ (tcon->ses->server->maxBuf -
+ MAX_CIFS_HDR_SIZE));
}
/* volume_info.password is freed above when existing session found
header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
NULL /* no tCon exists yet */ , 13 /* wct */ );
+ smb_buffer->Mid = GetNextMid(ses->server);
pSMB->req_no_secext.AndXCommand = 0xFF;
pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
/* send SMBsessionSetup here */
header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
NULL /* no tCon exists yet */ , 12 /* wct */ );
+
+ smb_buffer->Mid = GetNextMid(ses->server);
pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
pSMB->req.AndXCommand = 0xFF;
pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
/* send SMBsessionSetup here */
header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
NULL /* no tCon exists yet */ , 12 /* wct */ );
+
+ smb_buffer->Mid = GetNextMid(ses->server);
pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
/* send SMBsessionSetup here */
header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
NULL /* no tCon exists yet */ , 12 /* wct */ );
+
+ smb_buffer->Mid = GetNextMid(ses->server);
pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
pSMB->req.AndXCommand = 0xFF;
header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
NULL /*no tid */ , 4 /*wct */ );
+
+ smb_buffer->Mid = GetNextMid(ses->server);
smb_buffer->Uid = ses->Suid;
pSMB = (TCONX_REQ *) smb_buffer;
pSMBr = (TCONX_RSP *) smb_buffer_response;
return 0;
} else if (rc == -ESHUTDOWN) {
cFYI(1,("Waking up socket by sending it signal"));
- if(cifsd_task)
+ if(cifsd_task) {
send_sig(SIGKILL,cifsd_task,1);
+ wait_for_completion(&cifsd_complete);
+ }
rc = 0;
} /* else - we have an smb session
left on this socket do not kill cifsd */
struct dentry *temp;
int namelen = 0;
char *full_path;
+ char dirsep = CIFS_DIR_SEP(CIFS_SB(direntry->d_sb));
if(direntry == NULL)
return NULL; /* not much we can do if dentry is freed and
if (namelen < 0) {
break;
} else {
- full_path[namelen] = '\\';
+ full_path[namelen] = dirsep;
strncpy(full_path + namelen + 1, temp->d_name.name,
temp->d_name.len);
cFYI(0, (" name: %s ", full_path + namelen));
desiredAccess, CREATE_NOT_DIR,
&fileHandle, &oplock, buf, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if(rc == -EIO) {
+ /* old server, retry the open legacy style */
+ rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
+ desiredAccess, CREATE_NOT_DIR,
+ &fileHandle, &oplock, buf, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ }
if (rc) {
cFYI(1, ("cifs_create returned 0x%x ", rc));
} else {
CIFS_MOUNT_MAP_SPECIAL_CHR);
}
else {
- /* BB implement via Windows security descriptors */
+ /* BB implement mode setting via Windows security descriptors */
/* eg CIFSSMBWinSetPerms(xid,pTcon,full_path,mode,-1,-1,local_nls);*/
/* could set r/o dos attribute if mode & 0222 == 0 */
}
}
if (rc != 0) {
- cFYI(1,("Create worked but get_inode_info failed with rc = %d",
+ cFYI(1,
+ ("Create worked but get_inode_info failed rc = %d",
rc));
} else {
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_instantiate(direntry, newinode);
}
if((nd->flags & LOOKUP_OPEN) == FALSE) {
up(&direntry->d_sb->s_vfs_rename_sem);
if(full_path == NULL)
rc = -ENOMEM;
-
- if (full_path && (pTcon->ses->capabilities & CAP_UNIX)) {
+ else if (pTcon->ses->capabilities & CAP_UNIX) {
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path,
mode,(__u64)current->euid,(__u64)current->egid,
if(!rc) {
rc = cifs_get_inode_info_unix(&newinode, full_path,
inode->i_sb,xid);
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
if(rc == 0)
d_instantiate(direntry, newinode);
}
+ } else {
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+ int oplock = 0;
+ u16 fileHandle;
+ FILE_ALL_INFO * buf;
+
+ cFYI(1,("sfu compat create special file"));
+
+ buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL);
+ if(buf == NULL) {
+ kfree(full_path);
+ FreeXid(xid);
+ return -ENOMEM;
+ }
+
+ rc = CIFSSMBOpen(xid, pTcon, full_path,
+ FILE_CREATE, /* fail if exists */
+ GENERIC_WRITE /* BB would
+ WRITE_OWNER | WRITE_DAC be better? */,
+ /* Create a file and set the
+ file attribute to SYSTEM */
+ CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
+ &fileHandle, &oplock, buf,
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+ if(!rc) {
+ /* BB Do not bother to decode buf since no
+ local inode yet to put timestamps in */
+ CIFSSMBClose(xid, pTcon, fileHandle);
+ d_drop(direntry);
+ }
+ kfree(buf);
+ /* add code here to set EAs */
+ }
}
kfree(full_path);
parent_dir_inode->i_sb,xid);
if ((rc == 0) && (newInode != NULL)) {
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_add(direntry, newInode);
/* since paths are not looked up by component - the parent directories are presumed to be good here */
/* d_delete: cifs_d_delete, *//* not needed except for debugging */
/* no need for d_hash, d_compare, d_release, d_iput ... yet. BB confirm this BB */
};
+
+static int cifs_ci_hash(struct dentry *dentry, struct qstr *q)
+{
+ struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+ unsigned long hash;
+ int i;
+
+ hash = init_name_hash();
+ for (i = 0; i < q->len; i++)
+ hash = partial_name_hash(nls_tolower(codepage, q->name[i]),
+ hash);
+ q->hash = end_name_hash(hash);
+
+ return 0;
+}
+
+static int cifs_ci_compare(struct dentry *dentry, struct qstr *a,
+ struct qstr *b)
+{
+ struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+
+ if ((a->len == b->len) &&
+ (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) {
+ /*
+ * To preserve case, don't let an existing negative dentry's
+ * case take precedence. If a is not a negative dentry, this
+ * should have no side effects
+ */
+ memcpy((unsigned char *)a->name, b->name, a->len);
+ return 0;
+ }
+ return 1;
+}
+
+struct dentry_operations cifs_ci_dentry_ops = {
+ .d_revalidate = cifs_d_revalidate,
+ .d_hash = cifs_ci_hash,
+ .d_compare = cifs_ci_compare,
+};
__u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES;
__u16 netfid;
+
+ if(experimEnabled == 0)
+ return 0;
+
xid = GetXid();
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
pTcon = cifs_sb->tcon;
} else {
filter = convert_to_cifs_notify_flags(arg);
if(filter != 0) {
- rc = CIFSSMBNotify(xid, pTcon, 0 /* no subdirs */, netfid,
- filter, cifs_sb->local_nls);
+ rc = CIFSSMBNotify(xid, pTcon,
+ 0 /* no subdirs */, netfid,
+ filter, file, arg & DN_MULTISHOT,
+ cifs_sb->local_nls);
} else {
rc = -EINVAL;
}
it would close automatically but may be a way
to do it easily when inode freed or when
notify info is cleared/changed */
- cERROR(1,("notify rc %d",rc));
+ cFYI(1,("notify rc %d",rc));
}
}
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
+#include <linux/backing-dev.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
+#include <linux/mpage.h>
#include <linux/pagemap.h>
#include <linux/pagevec.h>
#include <linux/smp_lock.h>
+#include <linux/writeback.h>
+#include <linux/delay.h>
#include <asm/div64.h>
#include "cifsfs.h"
#include "cifspdu.h"
private_data->pInode = inode;
private_data->invalidHandle = FALSE;
private_data->closePend = FALSE;
+ /* we have to track num writers to the inode, since writepages
+ does not tell us which handle the write is for so there can
+ be a close (overlapping with write) of the filehandle that
+ cifs_writepages chose to use */
+ atomic_set(&private_data->wrtPending,0);
return private_data;
}
CREATE_NOT_DIR, &netfid, &oplock, buf,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (rc == -EIO) {
+ /* Old server, try legacy style OpenX */
+ rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
+ desiredAccess, CREATE_NOT_DIR, &netfid, &oplock, buf,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags
+ & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ }
if (rc) {
cFYI(1, ("cifs_open returned 0x%x ", rc));
goto out;
/* no sense reconnecting to close a file that is
already closed */
if (pTcon->tidStatus != CifsNeedReconnect) {
+ int timeout = 2;
+ while((atomic_read(&pSMBFile->wrtPending) != 0)
+ && (timeout < 1000) ) {
+ /* Give write a better chance to get to
+ server ahead of the close. We do not
+ want to add a wait_q here as it would
+ increase the memory utilization as
+ the struct would be in each open file,
+ but this should give enough time to
+ clear the socket */
+ cERROR(1,("close with pending writes"));
+ msleep(timeout);
+ timeout *= 4;
+ }
write_unlock(&file->f_owner.lock);
rc = CIFSSMBClose(xid, pTcon,
pSMBFile->netfid);
15 seconds is plenty */
}
-#ifdef CONFIG_CIFS_STATS
- if (total_written > 0) {
- atomic_inc(&pTcon->num_writes);
- spin_lock(&pTcon->stat_lock);
- pTcon->bytes_written += total_written;
- spin_unlock(&pTcon->stat_lock);
- }
-#endif
+ cifs_stats_bytes_written(pTcon, total_written);
/* since the write may have blocked check these pointers again */
if (file->f_dentry) {
pTcon = cifs_sb->tcon;
- /* cFYI(1,
- (" write %d bytes to offset %lld of %s", write_size,
- *poffset, file->f_dentry->d_name.name)); */
+ cFYI(1,("write %zd bytes to offset %lld of %s", write_size,
+ *poffset, file->f_dentry->d_name.name));
if (file->private_data == NULL)
return -EBADF;
if (rc != 0)
break;
}
-
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ /* BB FIXME We can not sign across two buffers yet */
+ if((experimEnabled) && ((pTcon->ses->server->secMode &
+ (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) == 0)) {
+ struct kvec iov[2];
+ unsigned int len;
+
+ len = min((size_t)cifs_sb->wsize,
+ write_size - total_written);
+ /* iov[0] is reserved for smb header */
+ iov[1].iov_base = (char *)write_data +
+ total_written;
+ iov[1].iov_len = len;
+ rc = CIFSSMBWrite2(xid, pTcon,
+ open_file->netfid, len,
+ *poffset, &bytes_written,
+ iov, 1, long_op);
+ } else
+ /* BB FIXME fixup indentation of line below */
+#endif
rc = CIFSSMBWrite(xid, pTcon,
open_file->netfid,
min_t(const int, cifs_sb->wsize,
15 seconds is plenty */
}
-#ifdef CONFIG_CIFS_STATS
- if (total_written > 0) {
- atomic_inc(&pTcon->num_writes);
- spin_lock(&pTcon->stat_lock);
- pTcon->bytes_written += total_written;
- spin_unlock(&pTcon->stat_lock);
- }
-#endif
+ cifs_stats_bytes_written(pTcon, total_written);
/* since the write may have blocked check these pointers again */
if (file->f_dentry) {
return total_written;
}
+struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode)
+{
+ struct cifsFileInfo *open_file;
+ int rc;
+
+ read_lock(&GlobalSMBSeslock);
+ list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
+ if (open_file->closePend)
+ continue;
+ if (open_file->pfile &&
+ ((open_file->pfile->f_flags & O_RDWR) ||
+ (open_file->pfile->f_flags & O_WRONLY))) {
+ atomic_inc(&open_file->wrtPending);
+ read_unlock(&GlobalSMBSeslock);
+ if((open_file->invalidHandle) &&
+ (!open_file->closePend) /* BB fixme -since the second clause can not be true remove it BB */) {
+ rc = cifs_reopen_file(&cifs_inode->vfs_inode,
+ open_file->pfile, FALSE);
+ /* if it fails, try another handle - might be */
+ /* dangerous to hold up writepages with retry */
+ if(rc) {
+ cFYI(1,("failed on reopen file in wp"));
+ read_lock(&GlobalSMBSeslock);
+ /* can not use this handle, no write
+ pending on this one after all */
+ atomic_dec
+ (&open_file->wrtPending);
+ continue;
+ }
+ }
+ return open_file;
+ }
+ }
+ read_unlock(&GlobalSMBSeslock);
+ return NULL;
+}
+
static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
{
struct address_space *mapping = page->mapping;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
struct inode *inode;
- struct cifsInodeInfo *cifsInode;
- struct cifsFileInfo *open_file = NULL;
- struct list_head *tmp;
- struct list_head *tmp1;
+ struct cifsFileInfo *open_file;
if (!mapping || !mapping->host)
return -EFAULT;
if (mapping->host->i_size - offset < (loff_t)to)
to = (unsigned)(mapping->host->i_size - offset);
- cifsInode = CIFS_I(mapping->host);
- read_lock(&GlobalSMBSeslock);
- /* BB we should start at the end */
- list_for_each_safe(tmp, tmp1, &cifsInode->openFileList) {
- open_file = list_entry(tmp, struct cifsFileInfo, flist);
- if (open_file->closePend)
- continue;
- /* We check if file is open for writing first */
- if ((open_file->pfile) &&
- ((open_file->pfile->f_flags & O_RDWR) ||
- (open_file->pfile->f_flags & O_WRONLY))) {
- read_unlock(&GlobalSMBSeslock);
- bytes_written = cifs_write(open_file->pfile,
- write_data, to-from,
- &offset);
- read_lock(&GlobalSMBSeslock);
+ open_file = find_writable_file(CIFS_I(mapping->host));
+ if (open_file) {
+ bytes_written = cifs_write(open_file->pfile, write_data,
+ to-from, &offset);
+ atomic_dec(&open_file->wrtPending);
/* Does mm or vfs already set times? */
- inode->i_atime =
- inode->i_mtime = current_fs_time(inode->i_sb);
- if ((bytes_written > 0) && (offset)) {
- rc = 0;
- } else if (bytes_written < 0) {
- if (rc == -EBADF) {
- /* have seen a case in which kernel seemed to
- have closed/freed a file even with writes
- active so we might as well see if there are
- other file structs to try for the same
- inode before giving up */
- continue;
- } else
- rc = bytes_written;
- }
- break; /* now that we found a valid file handle and
- tried to write to it we are done, no sense
- continuing to loop looking for another */
- }
- if (tmp->next == NULL) {
- cFYI(1, ("File instance %p removed", tmp));
- break;
+ inode->i_atime = inode->i_mtime = current_fs_time(inode->i_sb);
+ if ((bytes_written > 0) && (offset)) {
+ rc = 0;
+ } else if (bytes_written < 0) {
+ if (rc != -EBADF)
+ rc = bytes_written;
}
- }
- read_unlock(&GlobalSMBSeslock);
- if (open_file == NULL) {
+ } else {
cFYI(1, ("No writeable filehandles for inode"));
rc = -EIO;
}
return rc;
}
-#if 0
+#ifdef CONFIG_CIFS_EXPERIMENTAL
static int cifs_writepages(struct address_space *mapping,
- struct writeback_control *wbc)
+ struct writeback_control *wbc)
{
- int rc = -EFAULT;
+ struct backing_dev_info *bdi = mapping->backing_dev_info;
+ unsigned int bytes_to_write;
+ unsigned int bytes_written;
+ struct cifs_sb_info *cifs_sb;
+ int done = 0;
+ pgoff_t end = -1;
+ pgoff_t index;
+ int is_range = 0;
+ struct kvec iov[32];
+ int len;
+ int n_iov = 0;
+ pgoff_t next;
+ int nr_pages;
+ __u64 offset = 0;
+ struct cifsFileInfo *open_file;
+ struct page *page;
+ struct pagevec pvec;
+ int rc = 0;
+ int scanned = 0;
int xid;
+ cifs_sb = CIFS_SB(mapping->host->i_sb);
+
+ /*
+ * If wsize is smaller that the page cache size, default to writing
+ * one page at a time via cifs_writepage
+ */
+ if (cifs_sb->wsize < PAGE_CACHE_SIZE)
+ return generic_writepages(mapping, wbc);
+
+ /* BB FIXME we do not have code to sign across multiple buffers yet,
+ so go to older writepage style write which we can sign if needed */
+ if((cifs_sb->tcon->ses) && (cifs_sb->tcon->ses->server))
+ if(cifs_sb->tcon->ses->server->secMode &
+ (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+ return generic_writepages(mapping, wbc);
+
+ /*
+ * BB: Is this meaningful for a non-block-device file system?
+ * If it is, we should test it again after we do I/O
+ */
+ if (wbc->nonblocking && bdi_write_congested(bdi)) {
+ wbc->encountered_congestion = 1;
+ return 0;
+ }
+
xid = GetXid();
- /* Find contiguous pages then iterate through repeating
- call 16K write then Setpageuptodate or if LARGE_WRITE_X
- support then send larger writes via kevec so as to eliminate
- a memcpy */
+ pagevec_init(&pvec, 0);
+ if (wbc->sync_mode == WB_SYNC_NONE)
+ index = mapping->writeback_index; /* Start from prev offset */
+ else {
+ index = 0;
+ scanned = 1;
+ }
+ if (wbc->start || wbc->end) {
+ index = wbc->start >> PAGE_CACHE_SHIFT;
+ end = wbc->end >> PAGE_CACHE_SHIFT;
+ is_range = 1;
+ scanned = 1;
+ }
+retry:
+ while (!done && (index <= end) &&
+ (nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
+ PAGECACHE_TAG_DIRTY,
+ min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1))) {
+ int first;
+ unsigned int i;
+
+ first = -1;
+ next = 0;
+ n_iov = 0;
+ bytes_to_write = 0;
+
+ for (i = 0; i < nr_pages; i++) {
+ page = pvec.pages[i];
+ /*
+ * At this point we hold neither mapping->tree_lock nor
+ * lock on the page itself: the page may be truncated or
+ * invalidated (changing page->mapping to NULL), or even
+ * swizzled back from swapper_space to tmpfs file
+ * mapping
+ */
+
+ if (first < 0)
+ lock_page(page);
+ else if (TestSetPageLocked(page))
+ break;
+
+ if (unlikely(page->mapping != mapping)) {
+ unlock_page(page);
+ break;
+ }
+
+ if (unlikely(is_range) && (page->index > end)) {
+ done = 1;
+ unlock_page(page);
+ break;
+ }
+
+ if (next && (page->index != next)) {
+ /* Not next consecutive page */
+ unlock_page(page);
+ break;
+ }
+
+ if (wbc->sync_mode != WB_SYNC_NONE)
+ wait_on_page_writeback(page);
+
+ if (PageWriteback(page) ||
+ !test_clear_page_dirty(page)) {
+ unlock_page(page);
+ break;
+ }
+
+ if (page_offset(page) >= mapping->host->i_size) {
+ done = 1;
+ unlock_page(page);
+ break;
+ }
+
+ /*
+ * BB can we get rid of this? pages are held by pvec
+ */
+ page_cache_get(page);
+
+ len = min(mapping->host->i_size - page_offset(page),
+ (loff_t)PAGE_CACHE_SIZE);
+
+ /* reserve iov[0] for the smb header */
+ n_iov++;
+ iov[n_iov].iov_base = kmap(page);
+ iov[n_iov].iov_len = len;
+ bytes_to_write += len;
+
+ if (first < 0) {
+ first = i;
+ offset = page_offset(page);
+ }
+ next = page->index + 1;
+ if (bytes_to_write + PAGE_CACHE_SIZE > cifs_sb->wsize)
+ break;
+ }
+ if (n_iov) {
+ /* Search for a writable handle every time we call
+ * CIFSSMBWrite2. We can't rely on the last handle
+ * we used to still be valid
+ */
+ open_file = find_writable_file(CIFS_I(mapping->host));
+ if (!open_file) {
+ cERROR(1, ("No writable handles for inode"));
+ rc = -EBADF;
+ } else {
+ rc = CIFSSMBWrite2(xid, cifs_sb->tcon,
+ open_file->netfid,
+ bytes_to_write, offset,
+ &bytes_written, iov, n_iov,
+ 1);
+ atomic_dec(&open_file->wrtPending);
+ if (rc || bytes_written < bytes_to_write) {
+ cERROR(1,("Write2 ret %d, written = %d",
+ rc, bytes_written));
+ /* BB what if continued retry is
+ requested via mount flags? */
+ set_bit(AS_EIO, &mapping->flags);
+ SetPageError(page);
+ } else {
+ cifs_stats_bytes_written(cifs_sb->tcon,
+ bytes_written);
+ }
+ }
+ for (i = 0; i < n_iov; i++) {
+ page = pvec.pages[first + i];
+ kunmap(page);
+ unlock_page(page);
+ page_cache_release(page);
+ }
+ if ((wbc->nr_to_write -= n_iov) <= 0)
+ done = 1;
+ index = next;
+ }
+ pagevec_release(&pvec);
+ }
+ if (!scanned && !done) {
+ /*
+ * We hit the last page and there is more work to be done: wrap
+ * back to the start of the file
+ */
+ scanned = 1;
+ index = 0;
+ goto retry;
+ }
+ if (!is_range)
+ mapping->writeback_index = index;
+
FreeXid(xid);
+
return rc;
}
#endif
if (rc != 0)
break;
}
-
rc = CIFSSMBRead(xid, pTcon,
- open_file->netfid,
- current_read_size, *poffset,
- &bytes_read, &smb_read_data);
-
+ open_file->netfid,
+ current_read_size, *poffset,
+ &bytes_read, &smb_read_data);
pSMBr = (struct smb_com_read_rsp *)smb_read_data;
if (copy_to_user(current_offset,
smb_read_data + 4 /* RFC1001 hdr */
return rc;
}
} else {
-#ifdef CONFIG_CIFS_STATS
- atomic_inc(&pTcon->num_reads);
- spin_lock(&pTcon->stat_lock);
- pTcon->bytes_read += total_read;
- spin_unlock(&pTcon->stat_lock);
-#endif
+ cifs_stats_bytes_read(pTcon, bytes_read);
*poffset += bytes_read;
}
}
total_read += bytes_read, current_offset += bytes_read) {
current_read_size = min_t(const int, read_size - total_read,
cifs_sb->rsize);
+ /* For windows me and 9x we do not want to request more
+ than it negotiated since it will refuse the read then */
+ if((pTcon->ses) &&
+ !(pTcon->ses->capabilities & CAP_LARGE_FILES)) {
+ current_read_size = min_t(const int, current_read_size,
+ pTcon->ses->server->maxBuf - 128);
+ }
rc = -EAGAIN;
while (rc == -EAGAIN) {
if ((open_file->invalidHandle) &&
if (rc != 0)
break;
}
-
rc = CIFSSMBRead(xid, pTcon,
- open_file->netfid,
- current_read_size, *poffset,
- &bytes_read, ¤t_offset);
+ open_file->netfid,
+ current_read_size, *poffset,
+ &bytes_read, ¤t_offset);
}
if (rc || (bytes_read == 0)) {
if (total_read) {
return rc;
}
} else {
-#ifdef CONFIG_CIFS_STATS
- atomic_inc(&pTcon->num_reads);
- spin_lock(&pTcon->stat_lock);
- pTcon->bytes_read += total_read;
- spin_unlock(&pTcon->stat_lock);
-#endif
+ cifs_stats_bytes_read(pTcon, total_read);
*poffset += bytes_read;
}
}
}
rc = CIFSSMBRead(xid, pTcon,
- open_file->netfid,
- read_size, offset,
- &bytes_read, &smb_read_data);
- /* BB need to check return code here */
+ open_file->netfid,
+ read_size, offset,
+ &bytes_read, &smb_read_data);
+
+ /* BB more RC checks ? */
if (rc== -EAGAIN) {
if (smb_read_data) {
cifs_buf_release(smb_read_data);
le16_to_cpu(pSMBr->DataOffset), &lru_pvec);
i += bytes_read >> PAGE_CACHE_SHIFT;
-#ifdef CONFIG_CIFS_STATS
- atomic_inc(&pTcon->num_reads);
- spin_lock(&pTcon->stat_lock);
- pTcon->bytes_read += bytes_read;
- spin_unlock(&pTcon->stat_lock);
-#endif
+ cifs_stats_bytes_read(pTcon, bytes_read);
if ((int)(bytes_read & PAGE_CACHE_MASK) != bytes_read) {
i++; /* account for partial page */
page caching in the current Linux kernel design */
int is_size_safe_to_change(struct cifsInodeInfo *cifsInode)
{
- struct list_head *tmp;
- struct list_head *tmp1;
struct cifsFileInfo *open_file = NULL;
- int rc = TRUE;
- if (cifsInode == NULL)
- return rc;
-
- read_lock(&GlobalSMBSeslock);
- list_for_each_safe(tmp, tmp1, &cifsInode->openFileList) {
- open_file = list_entry(tmp, struct cifsFileInfo, flist);
- if (open_file == NULL)
- break;
- if (open_file->closePend)
- continue;
- /* We check if file is open for writing,
- BB we could supplement this with a check to see if file size
- changes have been flushed to server - ie inode metadata dirty */
- if ((open_file->pfile) &&
- ((open_file->pfile->f_flags & O_RDWR) ||
- (open_file->pfile->f_flags & O_WRONLY))) {
- rc = FALSE;
- break;
- }
- if (tmp->next == NULL) {
- cFYI(1, ("File instance %p removed", tmp));
- break;
- }
- }
- read_unlock(&GlobalSMBSeslock);
- return rc;
+ if (cifsInode)
+ open_file = find_writable_file(cifsInode);
+
+ if(open_file) {
+ /* there is not actually a write pending so let
+ this handle go free and allow it to
+ be closable if needed */
+ atomic_dec(&open_file->wrtPending);
+ return 0;
+ } else
+ return 1;
}
-
static int cifs_prepare_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
.readpage = cifs_readpage,
.readpages = cifs_readpages,
.writepage = cifs_writepage,
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ .writepages = cifs_writepages,
+#endif
.prepare_write = cifs_prepare_write,
.commit_write = cifs_commit_write,
.set_page_dirty = __set_page_dirty_nobuffers,
inode->i_fop = &cifs_file_direct_ops;
else
inode->i_fop = &cifs_file_ops;
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ inode->i_fop->lock = NULL;
inode->i_data.a_ops = &cifs_addr_ops;
+ /* check if server can support readpages */
+ if(pTcon->ses->server->maxBuf <
+ 4096 + MAX_CIFS_HDR_SIZE)
+ inode->i_data.a_ops->readpages = NULL;
} else if (S_ISDIR(inode->i_mode)) {
cFYI(1, (" Directory inode"));
inode->i_op = &cifs_dir_inode_ops;
pfindData = (FILE_ALL_INFO *)buf;
/* could do find first instead but this returns more info */
rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
- cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
+ /* BB optimize code so we do not make the above call
+ when server claims no NT SMB support and the above call
+ failed at least once - set flag in tcon or mount */
+ if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
+ rc = SMBQueryInformation(xid, pTcon, search_path,
+ pfindData, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+ }
+
}
/* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
if (rc) {
on dirs */
inode->i_mode = cifs_sb->mnt_dir_mode;
inode->i_mode |= S_IFDIR;
+ } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+ (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
+ /* No need to le64 convert size of zero */
+ (pfindData->EndOfFile == 0)) {
+ inode->i_mode = cifs_sb->mnt_file_mode;
+ inode->i_mode |= S_IFIFO;
+/* BB Finish for SFU style symlinks and devies */
+/* } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+ (cifsInfo->cifsAttrs & ATTR_SYSTEM) && ) */
+
} else {
inode->i_mode |= S_IFREG;
/* treat the dos attribute of read-only as read-only
inode->i_fop = &cifs_file_direct_ops;
else
inode->i_fop = &cifs_file_ops;
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ inode->i_fop->lock = NULL;
inode->i_data.a_ops = &cifs_addr_ops;
+ if(pTcon->ses->server->maxBuf <
+ 4096 + MAX_CIFS_HDR_SIZE)
+ inode->i_data.a_ops->readpages = NULL;
} else if (S_ISDIR(inode->i_mode)) {
cFYI(1, (" Directory inode "));
inode->i_op = &cifs_dir_inode_ops;
rc = cifs_get_inode_info(&newinode, full_path, NULL,
inode->i_sb,xid);
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_instantiate(direntry, newinode);
if (direntry->d_inode)
direntry->d_inode->i_nlink = 2;
struct cifsTconInfo *pTcon;
char *full_path = NULL;
int rc = -EACCES;
- int found = FALSE;
struct cifsFileInfo *open_file = NULL;
FILE_BASIC_INFO time_buf;
int set_time = FALSE;
__u64 uid = 0xFFFFFFFFFFFFFFFFULL;
__u64 gid = 0xFFFFFFFFFFFFFFFFULL;
struct cifsInodeInfo *cifsInode;
- struct list_head *tmp;
xid = GetXid();
filemap_fdatawait(direntry->d_inode->i_mapping);
if (attrs->ia_valid & ATTR_SIZE) {
- read_lock(&GlobalSMBSeslock);
/* To avoid spurious oplock breaks from server, in the case of
inodes that we already have open, avoid doing path based
setting of file size if we can do it by handle.
when the local oplock break takes longer to flush
writebehind data than the SMB timeout for the SetPathInfo
request would allow */
- list_for_each(tmp, &cifsInode->openFileList) {
- open_file = list_entry(tmp, struct cifsFileInfo,
- flist);
- /* We check if file is open for writing first */
- if ((open_file->pfile) &&
- ((open_file->pfile->f_flags & O_RDWR) ||
- (open_file->pfile->f_flags & O_WRONLY))) {
- if (open_file->invalidHandle == FALSE) {
- /* we found a valid, writeable network
- file handle to use to try to set the
- file size */
- __u16 nfid = open_file->netfid;
- __u32 npid = open_file->pid;
- read_unlock(&GlobalSMBSeslock);
- found = TRUE;
- rc = CIFSSMBSetFileSize(xid, pTcon,
- attrs->ia_size, nfid, npid,
- FALSE);
- cFYI(1, ("SetFileSize by handle "
- "(setattrs) rc = %d", rc));
- /* Do not need reopen and retry on
- EAGAIN since we will retry by
- pathname below */
-
- /* now that we found one valid file
- handle no sense continuing to loop
- trying others, so break here */
- break;
- }
+ open_file = find_writable_file(cifsInode);
+ if (open_file) {
+ __u16 nfid = open_file->netfid;
+ __u32 npid = open_file->pid;
+ rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
+ nfid, npid, FALSE);
+ atomic_dec(&open_file->wrtPending);
+ cFYI(1,("SetFSize for attrs rc = %d", rc));
+ if(rc == -EINVAL) {
+ int bytes_written;
+ rc = CIFSSMBWrite(xid, pTcon,
+ nfid, 0, attrs->ia_size,
+ &bytes_written, NULL, NULL,
+ 1 /* 45 seconds */);
+ cFYI(1,("Wrt seteof rc %d", rc));
}
}
- if (found == FALSE)
- read_unlock(&GlobalSMBSeslock);
-
if (rc != 0) {
/* Set file size by pathname rather than by handle
either because no valid, writeable file handle for
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
- cFYI(1, (" SetEOF by path (setattrs) rc = %d", rc));
+ cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
+ if(rc == -EINVAL) {
+ __u16 netfid;
+ int oplock = FALSE;
+
+ rc = SMBLegacyOpen(xid, pTcon, full_path,
+ FILE_OPEN,
+ SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
+ CREATE_NOT_DIR, &netfid, &oplock,
+ NULL, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (rc==0) {
+ int bytes_written;
+ rc = CIFSSMBWrite(xid, pTcon,
+ netfid, 0,
+ attrs->ia_size,
+ &bytes_written, NULL,
+ NULL, 1 /* 45 sec */);
+ cFYI(1,("wrt seteof rc %d",rc));
+ CIFSSMBClose(xid, pTcon, netfid);
+ }
+
+ }
}
/* Server is ok setting allocation size implicitly - no need
rc = vmtruncate(direntry->d_inode, attrs->ia_size);
cifs_truncate_page(direntry->d_inode->i_mapping,
direntry->d_inode->i_size);
- }
+ } else
+ goto cifs_setattr_exit;
}
if (attrs->ia_valid & ATTR_UID) {
- cFYI(1, (" CIFS - UID changed to %d", attrs->ia_uid));
+ cFYI(1, ("UID changed to %d", attrs->ia_uid));
uid = attrs->ia_uid;
- /* entry->uid = cpu_to_le16(attr->ia_uid); */
}
if (attrs->ia_valid & ATTR_GID) {
- cFYI(1, (" CIFS - GID changed to %d", attrs->ia_gid));
+ cFYI(1, ("GID changed to %d", attrs->ia_gid));
gid = attrs->ia_gid;
- /* entry->gid = cpu_to_le16(attr->ia_gid); */
}
time_buf.Attributes = 0;
if (attrs->ia_valid & ATTR_MODE) {
- cFYI(1, (" CIFS - Mode changed to 0x%x", attrs->ia_mode));
+ cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
mode = attrs->ia_mode;
- /* entry->mode = cpu_to_le16(attr->ia_mode); */
}
if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
} else
time_buf.LastWriteTime = 0;
-
- if (attrs->ia_valid & ATTR_CTIME) {
+ /* Do not set ctime explicitly unless other time
+ stamps are changed explicitly (i.e. by utime()
+ since we would then have a mix of client and
+ server times */
+
+ if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
set_time = TRUE;
- cFYI(1, (" CIFS - CTIME changed ")); /* BB probably no need */
+ /* Although Samba throws this field away
+ it may be useful to Windows - but we do
+ not want to set ctime unless some other
+ timestamp is changing */
+ cFYI(1, ("CIFS - CTIME changed "));
time_buf.ChangeTime =
cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
} else
time_buf.ChangeTime = 0;
if (set_time || time_buf.Attributes) {
- /* BB what if setting one attribute fails (such as size) but
- time setting works? */
time_buf.CreationTime = 0; /* do not change */
/* In the future we should experiment - try setting timestamps
via Handle (SetFileInfo) instead of by path */
&time_buf, cifs_sb->local_nls); */
}
}
+ /* Even if error on time set, no sense failing the call if
+ the server would set the time to a reasonable value anyway,
+ and this check ensures that we are not being called from
+ sys_utimes in which case we ought to fail the call back to
+ the user when the server rejects the call */
+ if((rc) && (attrs->ia_valid &&
+ (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
+ rc = 0;
}
/* do not need local check to inode_check_ok since the server does
that */
if (!rc)
rc = inode_setattr(direntry->d_inode, attrs);
+cifs_setattr_exit:
kfree(full_path);
FreeXid(xid);
return rc;
("Create symlink worked but get_inode_info failed with rc = %d ",
rc));
} else {
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_instantiate(direntry, newinode);
}
}
extern mempool_t *cifs_req_poolp;
extern struct task_struct * oplockThread;
-static __u16 GlobalMid; /* multiplex id - rotating counter */
-
/* The xid serves as a useful identifier for each incoming vfs request,
in a similar way to the mid which is useful to track each sent smb,
and CurrentXid can also provide a running counter (although it
GlobalTotalActiveXid++;
if (GlobalTotalActiveXid > GlobalMaxActiveXid)
GlobalMaxActiveXid = GlobalTotalActiveXid; /* keep high water mark for number of simultaneous vfs ops in our filesystem */
+ if(GlobalTotalActiveXid > 65000)
+ cFYI(1,("warning: more than 65000 requests active"));
xid = GlobalCurrentXid++;
spin_unlock(&GlobalMid_Lock);
return xid;
return;
}
+/*
+ Find a free multiplex id (SMB mid). Otherwise there could be
+ mid collisions which might cause problems, demultiplexing the
+ wrong response to this request. Multiplex ids could collide if
+ one of a series requests takes much longer than the others, or
+ if a very large number of long lived requests (byte range
+ locks or FindNotify requests) are pending. No more than
+ 64K-1 requests can be outstanding at one time. If no
+ mids are available, return zero. A future optimization
+ could make the combination of mids and uid the key we use
+ to demultiplex on (rather than mid alone).
+ In addition to the above check, the cifs demultiplex
+ code already used the command code as a secondary
+ check of the frame and if signing is negotiated the
+ response would be discarded if the mid were the same
+ but the signature was wrong. Since the mid is not put in the
+ pending queue until later (when it is about to be dispatched)
+ we do have to limit the number of outstanding requests
+ to somewhat less than 64K-1 although it is hard to imagine
+ so many threads being in the vfs at one time.
+*/
+__u16 GetNextMid(struct TCP_Server_Info *server)
+{
+ __u16 mid = 0;
+ __u16 last_mid;
+ int collision;
+
+ if(server == NULL)
+ return mid;
+
+ spin_lock(&GlobalMid_Lock);
+ last_mid = server->CurrentMid; /* we do not want to loop forever */
+ server->CurrentMid++;
+ /* This nested loop looks more expensive than it is.
+ In practice the list of pending requests is short,
+ fewer than 50, and the mids are likely to be unique
+ on the first pass through the loop unless some request
+ takes longer than the 64 thousand requests before it
+ (and it would also have to have been a request that
+ did not time out) */
+ while(server->CurrentMid != last_mid) {
+ struct list_head *tmp;
+ struct mid_q_entry *mid_entry;
+
+ collision = 0;
+ if(server->CurrentMid == 0)
+ server->CurrentMid++;
+
+ list_for_each(tmp, &server->pending_mid_q) {
+ mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+
+ if ((mid_entry->mid == server->CurrentMid) &&
+ (mid_entry->midState == MID_REQUEST_SUBMITTED)) {
+ /* This mid is in use, try a different one */
+ collision = 1;
+ break;
+ }
+ }
+ if(collision == 0) {
+ mid = server->CurrentMid;
+ break;
+ }
+ server->CurrentMid++;
+ }
+ spin_unlock(&GlobalMid_Lock);
+ return mid;
+}
+
+/* NB: MID can not be set if treeCon not passed in, in that
+ case it is responsbility of caller to set the mid */
void
header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
const struct cifsTconInfo *treeCon, int word_count
(2 * word_count) + sizeof (struct smb_hdr) -
4 /* RFC 1001 length field does not count */ +
2 /* for bcc field itself */ ;
- /* Note that this is the only network field that has to be converted to big endian and it is done just before we send it */
+ /* Note that this is the only network field that has to be converted
+ to big endian and it is done just before we send it */
buffer->Protocol[0] = 0xFF;
buffer->Protocol[1] = 'S';
buffer->Pid = cpu_to_le16((__u16)current->tgid);
buffer->PidHigh = cpu_to_le16((__u16)(current->tgid >> 16));
spin_lock(&GlobalMid_Lock);
- GlobalMid++;
- buffer->Mid = GlobalMid;
spin_unlock(&GlobalMid_Lock);
if (treeCon) {
buffer->Tid = treeCon->tid;
if (treeCon->ses->capabilities & CAP_STATUS32) {
buffer->Flags2 |= SMBFLG2_ERR_STATUS;
}
-
- buffer->Uid = treeCon->ses->Suid; /* always in LE format */
+ /* Uid is not converted */
+ buffer->Uid = treeCon->ses->Suid;
+ buffer->Mid = GetNextMid(treeCon->ses->server);
if(multiuser_mount != 0) {
/* For the multiuser case, there are few obvious technically */
/* possible mechanisms to match the local linux user (uid) */
}
if (treeCon->Flags & SMB_SHARE_IS_IN_DFS)
buffer->Flags2 |= SMBFLG2_DFS;
+ if (treeCon->nocase)
+ buffer->Flags |= SMBFLG_CASELESS;
if((treeCon->ses) && (treeCon->ses->server))
if(treeCon->ses->server->secMode &
(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
int
checkSMB(struct smb_hdr *smb, __u16 mid, int length)
{
- __u32 len = be32_to_cpu(smb->smb_buf_length);
+ __u32 len = smb->smb_buf_length;
+ __u32 clc_len; /* calculated length */
cFYI(0,
("Entering checkSMB with Length: %x, smb_buf_length: %x ",
length, len));
cERROR(1,
("smb_buf_length greater than MaxBufSize"));
cERROR(1,
- ("bad smb detected. Illegal length. The mid=%d",
+ ("bad smb detected. Illegal length. mid=%d",
smb->Mid));
return 1;
}
if (checkSMBhdr(smb, mid))
return 1;
-
- if ((4 + len != smbCalcSize(smb))
+ clc_len = smbCalcSize_LE(smb);
+ if ((4 + len != clc_len)
|| (4 + len != (unsigned int)length)) {
- return 0;
- } else {
- cERROR(1, ("smbCalcSize %x ", smbCalcSize(smb)));
- cERROR(1,
- ("bad smb size detected. The Mid=%d", smb->Mid));
- return 1;
+ cERROR(1, ("Calculated size 0x%x vs actual length 0x%x",
+ clc_len, 4 + len));
+ cERROR(1, ("bad smb size detected for Mid=%d", smb->Mid));
+ /* Windows XP can return a few bytes too much, presumably
+ an illegal pad, at the end of byte range lock responses
+ so we allow for up to eight byte pad, as long as actual
+ received length is as long or longer than calculated length */
+ if((4+len > clc_len) && (len <= clc_len + 3))
+ return 0;
+ else
+ return 1;
}
+ return 0;
}
int
is_valid_oplock_break(struct smb_hdr *buf)
list_for_each(tmp, &GlobalTreeConnectionList) {
tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
if (tcon->tid == buf->Tid) {
-#ifdef CONFIG_CIFS_STATS
- atomic_inc(&tcon->num_oplock_brks);
-#endif
+ cifs_stats_inc(&tcon->num_oplock_brks);
list_for_each(tmp1,&tcon->openFileList){
netfile = list_entry(tmp1,struct cifsFileInfo,
tlist);
int i,j,charlen;
int len_remaining = maxlen;
char src_char;
+ __u16 temp;
if(!mapChars)
return cifs_strtoUCS((wchar_t *) target, source, PATH_MAX, cp);
break;*/
default:
charlen = cp->char2uni(source+i,
- len_remaining, target+j);
+ len_remaining, &temp);
/* if no match, use question mark, which
at least in some cases servers as wild card */
if(charlen < 1) {
target[j] = cpu_to_le16(0x003f);
charlen = 1;
- }
+ } else
+ target[j] = cpu_to_le16(temp);
len_remaining -= charlen;
/* character may take more than one byte in the
the source string, but will take exactly two
int
cifs_inet_pton(int address_family, char *cp,void *dst)
{
- struct in_addr address;
int value;
int digit;
int i;
if (value > addr_class_max[end - bytes])
return 0;
- address.s_addr = *((__be32 *) bytes) | htonl(value);
- *((__be32 *)dst) = address.s_addr;
+ *((__be32 *)dst) = *((__be32 *) bytes) | htonl(value);
return 1; /* success */
}
if (smb->Flags2 & SMBFLG2_ERR_STATUS) {
/* translate the newer STATUS codes to old style errors and then to POSIX errors */
__u32 err = le32_to_cpu(smb->Status.CifsError);
- if(cifsFYI)
+ if(cifsFYI & CIFS_RC)
cifs_print_status(err);
ntstatus_to_dos(err, &smberrclass, &smberrcode);
} else {
smbCalcSize(struct smb_hdr *ptr)
{
return (sizeof (struct smb_hdr) + (2 * ptr->WordCount) +
- BCC(ptr));
+ 2 /* size of the bcc field */ + BCC(ptr));
+}
+
+unsigned int
+smbCalcSize_LE(struct smb_hdr *ptr)
+{
+ return (sizeof (struct smb_hdr) + (2 * ptr->WordCount) +
+ 2 /* size of the bcc field */ + le16_to_cpu(BCC_LE(ptr)));
}
/* The following are taken from fs/ntfs/util.c */
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#pragma pack(1)
-
#define NTLMSSP_SIGNATURE "NTLMSSP"
/* Message Types */
#define NtLmNegotiate cpu_to_le32(1)
__le16 Length;
__le16 MaximumLength;
__le32 Buffer; /* offset to buffer */
-} SECURITY_BUFFER;
+} __attribute__((packed)) SECURITY_BUFFER;
typedef struct _NEGOTIATE_MESSAGE {
__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */
char DomainString[0];
/* followed by WorkstationString */
-} NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
+} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
typedef struct _CHALLENGE_MESSAGE {
__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
__u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
__u8 Reserved[8];
SECURITY_BUFFER TargetInfoArray;
-} CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
+} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
typedef struct _AUTHENTICATE_MESSAGE {
__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
SECURITY_BUFFER SessionKey;
__le32 NegotiateFlags;
char UserString[0];
-} AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
-
-#pragma pack() /* resume default structure packing */
+} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
}
*ptmp_inode = new_inode(file->f_dentry->d_sb);
- tmp_dentry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ tmp_dentry->d_op = &cifs_ci_dentry_ops;
+ else
+ tmp_dentry->d_op = &cifs_dentry_ops;
if(*ptmp_inode == NULL)
return rc;
rc = 1;
tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
}
tmp_inode->i_mode |= S_IFDIR;
+ } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+ (attr & ATTR_SYSTEM) && (end_of_file == 0)) {
+ *pobject_type = DT_FIFO;
+ tmp_inode->i_mode |= S_IFIFO;
+/* BB Finish for SFU style symlinks and devies */
+/* } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+ (attr & ATTR_SYSTEM) && ) { */
/* we no longer mark these because we could not follow them */
/* } else if (attr & ATTR_REPARSE) {
*pobject_type = DT_LNK;
tmp_inode->i_fop = &cifs_file_direct_ops;
else
tmp_inode->i_fop = &cifs_file_ops;
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ tmp_inode->i_fop->lock = NULL;
tmp_inode->i_data.a_ops = &cifs_addr_ops;
-
+ if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
+ (cifs_sb->tcon->ses->server->maxBuf <
+ 4096 + MAX_CIFS_HDR_SIZE))
+ tmp_inode->i_data.a_ops->readpages = NULL;
if(isNewInode)
- return; /* No sense invalidating pages for new inode since we
- have not started caching readahead file data yet */
+ return; /* No sense invalidating pages for new inode
+ since have not started caching readahead file
+ data yet */
if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
(local_size == tmp_inode->i_size)) {
tmp_inode->i_fop = &cifs_file_direct_ops;
else
tmp_inode->i_fop = &cifs_file_ops;
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ tmp_inode->i_fop->lock = NULL;
tmp_inode->i_data.a_ops = &cifs_addr_ops;
+ if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
+ (cifs_sb->tcon->ses->server->maxBuf <
+ 4096 + MAX_CIFS_HDR_SIZE))
+ tmp_inode->i_data.a_ops->readpages = NULL;
if(isNewInode)
return; /* No sense invalidating pages for new inode since we
rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls,
&cifsFile->netfid, &cifsFile->srch_inf,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
if(rc == 0)
cifsFile->invalidHandle = FALSE;
if((rc == -EOPNOTSUPP) &&
return rc;
}
+/* Check if directory that we are searching has changed so we can decide
+ whether we can use the cached search results from the previous search */
+static int is_dir_changed(struct file * file)
+{
+ struct inode * inode;
+ struct cifsInodeInfo *cifsInfo;
+
+ if(file->f_dentry == NULL)
+ return 0;
+
+ inode = file->f_dentry->d_inode;
+
+ if(inode == NULL)
+ return 0;
+
+ cifsInfo = CIFS_I(inode);
+
+ if(cifsInfo->time == 0)
+ return 1; /* directory was changed, perhaps due to unlink */
+ else
+ return 0;
+
+}
+
/* find the corresponding entry in the search */
/* Note that the SMB server returns search entries for . and .. which
complicates logic here if we choose to parse for them and we do not
struct cifsFileInfo * cifsFile = file->private_data;
/* check if index in the buffer */
- if((cifsFile == NULL) || (ppCurrentEntry == NULL) || (num_to_ret == NULL))
+ if((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
+ (num_to_ret == NULL))
return -ENOENT;
*ppCurrentEntry = NULL;
cifsFile->srch_inf.index_of_last_entry -
cifsFile->srch_inf.entries_in_buffer;
/* dump_cifs_file_struct(file, "In fce ");*/
- if(index_to_find < first_entry_in_buffer) {
+ if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
+ is_dir_changed(file)) ||
+ (index_to_find < first_entry_in_buffer)) {
/* close and restart search */
cFYI(1,("search backing up - close and restart search"));
cifsFile->invalidHandle = TRUE;
while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
(rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){
cFYI(1,("calling findnext2"));
- rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, &cifsFile->srch_inf);
+ rc = CIFSFindNext(xid,pTcon,cifsFile->netfid,
+ &cifsFile->srch_inf);
if(rc)
return -ENOENT;
}
char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
smbCalcSize((struct smb_hdr *)
cifsFile->srch_inf.ntwrk_buf_start);
-/* dump_cifs_file_struct(file,"found entry in fce "); */
first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
- cifsFile->srch_inf.entries_in_buffer;
pos_in_buf = index_to_find - first_entry_in_buffer;
cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
current_entry = cifsFile->srch_inf.srch_entries_start;
for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
- /* go entry to next entry figuring out which we need to start with */
+ /* go entry by entry figuring out which is first */
/* if( . or ..)
skip */
rc = cifs_entry_is_dot(current_entry,cifsFile);
}
if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
- cFYI(1,("can not return entries when pos_in_buf beyond last entry"));
+ cFYI(1,("can not return entries pos_in_buf beyond last entry"));
*num_to_ret = 0;
} else
*num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
-/* dump_cifs_file_struct(file, "end fce ");*/
return rc;
}
(FILE_DIRECTORY_INFO *)pfindEntry,&obj_type, rc);
}
- rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,tmp_inode->i_ino,obj_type);
+ rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,
+ tmp_inode->i_ino,obj_type);
if(rc) {
cFYI(1,("filldir rc = %d",rc));
}
FreeXid(xid);
return -EIO;
}
-/* dump_cifs_file_struct(file, "Begin rdir "); */
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
pTcon = cifs_sb->tcon;
if(pTcon == NULL)
return -EINVAL;
-/* cFYI(1,("readdir2 pos: %lld",file->f_pos)); */
-
switch ((int) file->f_pos) {
case 0:
/*if (filldir(direntry, ".", 1, file->f_pos,
cifsFile->search_resume_name = NULL; */
/* BB account for . and .. in f_pos as special case */
- /* dump_cifs_file_struct(file, "rdir after default ");*/
rc = find_cifs_entry(xid,pTcon, file,
¤t_entry,&num_to_fill);
cifs_save_resume_key(current_entry,cifsFile);
break;
} else
- current_entry = nxt_dir_entry(current_entry,end_of_smb);
+ current_entry = nxt_dir_entry(current_entry,
+ end_of_smb);
}
kfree(tmp_buf);
break;
} /* end switch */
rddir2_exit:
- /* dump_cifs_file_struct(file, "end rdir "); */
FreeXid(xid);
return rc;
}
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#pragma pack(1)
-
/* NB: unlike smb/cifs packets, the RFC1002 structures are big endian */
/* RFC 1002 session packet types */
__u8 calling_len;
__u8 calling_name[32];
__u8 scope2; /* null */
- } session_req;
+ } __attribute__((packed)) session_req;
struct {
__u32 retarget_ip_addr;
__u16 port;
- } retarget_resp;
+ } __attribute__((packed)) retarget_resp;
__u8 neg_ses_resp_error_code;
/* POSITIVE_SESSION_RESPONSE packet does not include trailer.
SESSION_KEEP_ALIVE packet also does not include a trailer.
Trailer for the SESSION_MESSAGE packet is SMB/CIFS header */
- } trailer;
-};
+ } __attribute__((packed)) trailer;
+} __attribute__((packed));
/* Negative Session Response error codes */
#define RFC1002_NOT_LISTENING_CALLED 0x80 /* not listening on called name */
(tcp name) or ip address or an /etc/hosts equivalent mapping to ip address.*/
#define DEFAULT_CIFS_CALLED_NAME "*SMBSERVER "
-
-#pragma pack() /* resume default structure packing */
-
return NULL;
}
- temp = (struct mid_q_entry *) mempool_alloc(cifs_mid_poolp,SLAB_KERNEL | SLAB_NOFS);
+ temp = (struct mid_q_entry *) mempool_alloc(cifs_mid_poolp,
+ SLAB_KERNEL | SLAB_NOFS);
if (temp == NULL)
return temp;
else {
temp->pid = current->pid;
temp->command = smb_buffer->Command;
cFYI(1, ("For smb_command %d", temp->command));
- do_gettimeofday(&temp->when_sent);
+ /* do_gettimeofday(&temp->when_sent);*/ /* easier to use jiffies */
+ /* when mid allocated can be before when sent */
+ temp->when_alloc = jiffies;
temp->ses = ses;
temp->tsk = current;
}
static void
DeleteMidQEntry(struct mid_q_entry *midEntry)
{
+#ifdef CONFIG_CIFS_STATS2
+ unsigned long now;
+#endif
spin_lock(&GlobalMid_Lock);
midEntry->midState = MID_FREE;
list_del(&midEntry->qhead);
cifs_buf_release(midEntry->resp_buf);
else
cifs_small_buf_release(midEntry->resp_buf);
+#ifdef CONFIG_CIFS_STATS2
+ now = jiffies;
+ /* commands taking longer than one second are indications that
+ something is wrong, unless it is quite a slow link or server */
+ if((now - midEntry->when_alloc) > HZ) {
+ if((cifsFYI & CIFS_TIMER) &&
+ (midEntry->command != SMB_COM_LOCKING_ANDX)) {
+ printk(KERN_DEBUG " CIFS slow rsp: cmd %d mid %d",
+ midEntry->command, midEntry->mid);
+ printk(" A: 0x%lx S: 0x%lx R: 0x%lx\n",
+ now - midEntry->when_alloc,
+ now - midEntry->when_sent,
+ now - midEntry->when_received);
+ }
+ }
+#endif
mempool_free(midEntry, cifs_mid_poolp);
}
Flags2 is converted in SendReceive */
smb_buffer->smb_buf_length = cpu_to_be32(smb_buffer->smb_buf_length);
- cFYI(1, ("Sending smb of length %d ", smb_buf_length));
+ cFYI(1, ("Sending smb of length %d", smb_buf_length));
dump_smb(smb_buffer, len);
while (len > 0) {
rc = kernel_sendmsg(ssocket, &smb_msg, &iov, 1, len);
if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
i++;
- if(i > 60) {
+ /* smaller timeout here than send2 since smaller size */
+ /* Although it may not be required, this also is smaller
+ oplock break time */
+ if(i > 12) {
cERROR(1,
- ("sends on sock %p stuck for 30 seconds",
+ ("sends on sock %p stuck for 7 seconds",
ssocket));
rc = -EAGAIN;
break;
}
- msleep(500);
+ msleep(1 << i);
continue;
}
if (rc < 0)
break;
+ else
+ i = 0; /* reset i after each successful send */
iov.iov_base += rc;
iov.iov_len -= rc;
len -= rc;
}
if (rc < 0) {
- cERROR(1,("Error %d sending data on socket to server.", rc));
+ cERROR(1,("Error %d sending data on socket to server", rc));
} else {
rc = 0;
}
return rc;
}
-#ifdef CIFS_EXPERIMENTAL
-/* BB finish off this function, adding support for writing set of pages as iovec */
-/* and also adding support for operations that need to parse the response smb */
-
-int
-smb_sendv(struct socket *ssocket, struct smb_hdr *smb_buffer,
- unsigned int smb_buf_length, struct kvec * write_vector
- /* page list */, struct sockaddr *sin)
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+static int
+smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
+ struct sockaddr *sin)
{
int rc = 0;
int i = 0;
struct msghdr smb_msg;
- number_of_pages += 1; /* account for SMB header */
- struct kvec * piov = kmalloc(number_of_pages * sizeof(struct kvec));
- unsigned len = smb_buf_length + 4;
-
+ struct smb_hdr *smb_buffer = iov[0].iov_base;
+ unsigned int len = iov[0].iov_len;
+ unsigned int total_len;
+ int first_vec = 0;
+
if(ssocket == NULL)
return -ENOTSOCK; /* BB eventually add reconnect code here */
- iov.iov_base = smb_buffer;
- iov.iov_len = len;
smb_msg.msg_name = sin;
smb_msg.msg_namelen = sizeof (struct sockaddr);
cifssmb.c and RFC1001 len is converted to bigendian in smb_send
Flags2 is converted in SendReceive */
+
+ total_len = 0;
+ for (i = 0; i < n_vec; i++)
+ total_len += iov[i].iov_len;
+
smb_buffer->smb_buf_length = cpu_to_be32(smb_buffer->smb_buf_length);
- cFYI(1, ("Sending smb of length %d ", smb_buf_length));
+ cFYI(1, ("Sending smb: total_len %d", total_len));
dump_smb(smb_buffer, len);
- while (len > 0) {
- rc = kernel_sendmsg(ssocket, &smb_msg, &iov, number_of_pages,
- len);
+ while (total_len) {
+ rc = kernel_sendmsg(ssocket, &smb_msg, &iov[first_vec],
+ n_vec - first_vec, total_len);
if ((rc == -ENOSPC) || (rc == -EAGAIN)) {
i++;
- if(i > 60) {
+ if(i >= 14) {
cERROR(1,
- ("sends on sock %p stuck for 30 seconds",
+ ("sends on sock %p stuck for 15 seconds",
ssocket));
rc = -EAGAIN;
break;
}
- msleep(500);
+ msleep(1 << i);
continue;
}
if (rc < 0)
break;
- iov.iov_base += rc;
- iov.iov_len -= rc;
- len -= rc;
+
+ if (rc >= total_len) {
+ WARN_ON(rc > total_len);
+ break;
+ }
+ if(rc == 0) {
+ /* should never happen, letting socket clear before
+ retrying is our only obvious option here */
+ cERROR(1,("tcp sent no data"));
+ msleep(500);
+ continue;
+ }
+ total_len -= rc;
+ /* the line below resets i */
+ for (i = first_vec; i < n_vec; i++) {
+ if (iov[i].iov_len) {
+ if (rc > iov[i].iov_len) {
+ rc -= iov[i].iov_len;
+ iov[i].iov_len = 0;
+ } else {
+ iov[i].iov_base += rc;
+ iov[i].iov_len -= rc;
+ first_vec = i;
+ break;
+ }
+ }
+ }
+ i = 0; /* in case we get ENOSPC on the next send */
}
if (rc < 0) {
- cERROR(1,("Error %d sending data on socket to server.", rc));
- } else {
+ cERROR(1,("Error %d sending data on socket to server", rc));
+ } else
rc = 0;
- }
return rc;
}
-
int
-CIFSSendRcv(const unsigned int xid, struct cifsSesInfo *ses,
- struct smb_hdr *in_buf, struct kvec * write_vector /* page list */, int *pbytes_returned, const int long_op)
+SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
+ struct kvec *iov, int n_vec, int *pbytes_returned,
+ const int long_op)
{
int rc = 0;
- unsigned long timeout = 15 * HZ;
- struct mid_q_entry *midQ = NULL;
+ unsigned int receive_len;
+ unsigned long timeout;
+ struct mid_q_entry *midQ;
+ struct smb_hdr *in_buf = iov[0].iov_base;
if (ses == NULL) {
cERROR(1,("Null smb session"));
cERROR(1,("Null tcp session"));
return -EIO;
}
- if(pbytes_returned == NULL)
- return -EIO;
- else
- *pbytes_returned = 0;
-
-
- if(ses->server->tcpStatus == CIFS_EXITING)
+ if(ses->server->tcpStatus == CifsExiting)
return -ENOENT;
/* Ensure that we do not send more than 50 overlapping requests
} else {
spin_lock(&GlobalMid_Lock);
while(1) {
- if(atomic_read(&ses->server->inFlight) >= cifs_max_pending){
+ if(atomic_read(&ses->server->inFlight) >=
+ cifs_max_pending){
spin_unlock(&GlobalMid_Lock);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&ses->server->num_waiters);
+#endif
wait_event(ses->server->request_q,
atomic_read(&ses->server->inFlight)
< cifs_max_pending);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&ses->server->num_waiters);
+#endif
spin_lock(&GlobalMid_Lock);
} else {
if(ses->server->tcpStatus == CifsExiting) {
if (ses->server->tcpStatus == CifsExiting) {
rc = -ENOENT;
- goto cifs_out_label;
+ goto out_unlock2;
} else if (ses->server->tcpStatus == CifsNeedReconnect) {
cFYI(1,("tcp session dead - return to caller to retry"));
rc = -EAGAIN;
- goto cifs_out_label;
+ goto out_unlock2;
} else if (ses->status != CifsGood) {
/* check if SMB session is bad because we are setting it up */
if((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) &&
(in_buf->Command != SMB_COM_NEGOTIATE)) {
rc = -EAGAIN;
- goto cifs_out_label;
+ goto out_unlock2;
} /* else ok - we are setting up session */
}
midQ = AllocMidQEntry(in_buf, ses);
return -ENOMEM;
}
- if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
- up(&ses->server->tcpSem);
- cERROR(1,
- ("Illegal length, greater than maximum frame, %d ",
- in_buf->smb_buf_length));
+/* BB FIXME */
+/* rc = cifs_sign_smb2(iov, n_vec, ses->server, &midQ->sequence_number); */
+
+ midQ->midState = MID_REQUEST_SUBMITTED;
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&ses->server->inSend);
+#endif
+ rc = smb_send2(ses->server->ssocket, iov, n_vec,
+ (struct sockaddr *) &(ses->server->addr.sockAddr));
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&ses->server->inSend);
+ midQ->when_sent = jiffies;
+#endif
+ if(rc < 0) {
DeleteMidQEntry(midQ);
+ up(&ses->server->tcpSem);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
- return -EIO;
+ return rc;
+ } else
+ up(&ses->server->tcpSem);
+ if (long_op == -1)
+ goto cifs_no_response_exit2;
+ else if (long_op == 2) /* writes past end of file can take loong time */
+ timeout = 180 * HZ;
+ else if (long_op == 1)
+ timeout = 45 * HZ; /* should be greater than
+ servers oplock break timeout (about 43 seconds) */
+ else if (long_op > 2) {
+ timeout = MAX_SCHEDULE_TIMEOUT;
+ } else
+ timeout = 15 * HZ;
+ /* wait for 15 seconds or until woken up due to response arriving or
+ due to last connection to this server being unmounted */
+ if (signal_pending(current)) {
+ /* if signal pending do not hold up user for full smb timeout
+ but we still give response a change to complete */
+ timeout = 2 * HZ;
+ }
+
+ /* No user interrupts in wait - wreaks havoc with performance */
+ if(timeout != MAX_SCHEDULE_TIMEOUT) {
+ timeout += jiffies;
+ wait_event(ses->server->response_q,
+ (!(midQ->midState & MID_REQUEST_SUBMITTED)) ||
+ time_after(jiffies, timeout) ||
+ ((ses->server->tcpStatus != CifsGood) &&
+ (ses->server->tcpStatus != CifsNew)));
+ } else {
+ wait_event(ses->server->response_q,
+ (!(midQ->midState & MID_REQUEST_SUBMITTED)) ||
+ ((ses->server->tcpStatus != CifsGood) &&
+ (ses->server->tcpStatus != CifsNew)));
}
- /* BB can we sign efficiently in this path? */
- rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
+ spin_lock(&GlobalMid_Lock);
+ if (midQ->resp_buf) {
+ spin_unlock(&GlobalMid_Lock);
+ receive_len = midQ->resp_buf->smb_buf_length;
+ } else {
+ cERROR(1,("No response to cmd %d mid %d",
+ midQ->command, midQ->mid));
+ if(midQ->midState == MID_REQUEST_SUBMITTED) {
+ if(ses->server->tcpStatus == CifsExiting)
+ rc = -EHOSTDOWN;
+ else {
+ ses->server->tcpStatus = CifsNeedReconnect;
+ midQ->midState = MID_RETRY_NEEDED;
+ }
+ }
- midQ->midState = MID_REQUEST_SUBMITTED;
-/* rc = smb_sendv(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
- piovec,
- (struct sockaddr *) &(ses->server->addr.sockAddr));*/
- if(rc < 0) {
+ if (rc != -EHOSTDOWN) {
+ if(midQ->midState == MID_RETRY_NEEDED) {
+ rc = -EAGAIN;
+ cFYI(1,("marking request for retry"));
+ } else {
+ rc = -EIO;
+ }
+ }
+ spin_unlock(&GlobalMid_Lock);
DeleteMidQEntry(midQ);
- up(&ses->server->tcpSem);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
return rc;
- } else
- up(&ses->server->tcpSem);
-cifs_out_label:
- if(midQ)
- DeleteMidQEntry(midQ);
-
+ }
+
+ if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
+ cERROR(1, ("Frame too large received. Length: %d Xid: %d",
+ receive_len, xid));
+ rc = -EIO;
+ } else { /* rcvd frame is ok */
+
+ if (midQ->resp_buf &&
+ (midQ->midState == MID_RESPONSE_RECEIVED)) {
+ in_buf->smb_buf_length = receive_len;
+ /* BB verify that length would not overrun small buf */
+ memcpy((char *)in_buf + 4,
+ (char *)midQ->resp_buf + 4,
+ receive_len);
+
+ dump_smb(in_buf, 80);
+ /* convert the length into a more usable form */
+ if((receive_len > 24) &&
+ (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
+ SECMODE_SIGN_ENABLED))) {
+ rc = cifs_verify_signature(in_buf,
+ ses->server->mac_signing_key,
+ midQ->sequence_number+1);
+ if(rc) {
+ cERROR(1,("Unexpected SMB signature"));
+ /* BB FIXME add code to kill session */
+ }
+ }
+
+ *pbytes_returned = in_buf->smb_buf_length;
+
+ /* BB special case reconnect tid and uid here? */
+ rc = map_smb_to_linux_error(in_buf);
+
+ /* convert ByteCount if necessary */
+ if (receive_len >=
+ sizeof (struct smb_hdr) -
+ 4 /* do not count RFC1001 header */ +
+ (2 * in_buf->WordCount) + 2 /* bcc */ )
+ BCC(in_buf) = le16_to_cpu(BCC(in_buf));
+ } else {
+ rc = -EIO;
+ cFYI(1,("Bad MID state?"));
+ }
+ }
+cifs_no_response_exit2:
+ DeleteMidQEntry(midQ);
+
if(long_op < 3) {
- atomic_dec(&ses->server->inFlight);
+ atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
return rc;
-}
+out_unlock2:
+ up(&ses->server->tcpSem);
+ /* If not lock req, update # of requests on wire to server */
+ if(long_op < 3) {
+ atomic_dec(&ses->server->inFlight);
+ wake_up(&ses->server->request_q);
+ }
+ return rc;
+}
#endif /* CIFS_EXPERIMENTAL */
int
if(atomic_read(&ses->server->inFlight) >=
cifs_max_pending){
spin_unlock(&GlobalMid_Lock);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&ses->server->num_waiters);
+#endif
wait_event(ses->server->request_q,
atomic_read(&ses->server->inFlight)
< cifs_max_pending);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&ses->server->num_waiters);
+#endif
spin_lock(&GlobalMid_Lock);
} else {
if(ses->server->tcpStatus == CifsExiting) {
rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
midQ->midState = MID_REQUEST_SUBMITTED;
+#ifdef CONFIG_CIFS_STATS2
+ atomic_inc(&ses->server->inSend);
+#endif
rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
(struct sockaddr *) &(ses->server->addr.sockAddr));
+#ifdef CONFIG_CIFS_STATS2
+ atomic_dec(&ses->server->inSend);
+ midQ->when_sent = jiffies;
+#endif
if(rc < 0) {
DeleteMidQEntry(midQ);
up(&ses->server->tcpSem);
if (long_op == -1)
goto cifs_no_response_exit;
else if (long_op == 2) /* writes past end of file can take loong time */
- timeout = 300 * HZ;
+ timeout = 180 * HZ;
else if (long_op == 1)
timeout = 45 * HZ; /* should be greater than
servers oplock break timeout (about 43 seconds) */
spin_lock(&GlobalMid_Lock);
if (midQ->resp_buf) {
spin_unlock(&GlobalMid_Lock);
- receive_len = be32_to_cpu(*(__be32 *)midQ->resp_buf);
+ receive_len = midQ->resp_buf->smb_buf_length;
} else {
- cERROR(1,("No response buffer"));
+ cERROR(1,("No response for cmd %d mid %d",
+ midQ->command, midQ->mid));
if(midQ->midState == MID_REQUEST_SUBMITTED) {
if(ses->server->tcpStatus == CifsExiting)
rc = -EHOSTDOWN;
BCC(out_buf) = le16_to_cpu(BCC(out_buf));
} else {
rc = -EIO;
- cFYI(1,("Bad MID state? "));
+ cERROR(1,("Bad MID state? "));
}
}
cifs_no_response_exit:
wait_queue_head_t *wqh;
if (!atomic_read(&inode->i_count))
- WARN_ON(!(inode->i_state & I_WILL_FREE));
+ WARN_ON(!(inode->i_state & (I_WILL_FREE|I_FREEING)));
else
WARN_ON(inode->i_state & I_WILL_FREE);
ToDo/Notes:
- Find and fix bugs.
- - In between ntfs_prepare/commit_write, need exclusion between
- simultaneous file extensions. This is given to us by holding i_sem
- on the inode. The only places in the kernel when a file is resized
- are prepare/commit write and truncate for both of which i_sem is
- held. Just have to be careful in readpage/writepage and all other
- helpers not running under i_sem that we play nice...
- Also need to be careful with initialized_size extention in
- ntfs_prepare_write. Basically, just be _very_ careful in this code...
- UPDATE: The only things that need to be checked are read/writepage
- which do not hold i_sem. Note writepage cannot change i_size but it
- needs to cope with a concurrent i_size change, just like readpage.
- Also both need to cope with concurrent changes to the other sizes,
- i.e. initialized/allocated/compressed size, as well.
+ - The only places in the kernel where a file is resized are
+ ntfs_file_write*() and ntfs_truncate() for both of which i_sem is
+ held. Just have to be careful in read-/writepage and other helpers
+ not running under i_sem that we play nice... Also need to be careful
+ with initialized_size extension in ntfs_file_write*() and writepage.
+ UPDATE: The only things that need to be checked are the compressed
+ write and the other attribute resize/write cases like index
+ attributes, etc. For now none of these are implemented so are safe.
+ - Implement filling in of holes in aops.c::ntfs_writepage() and its
+ helpers.
- Implement mft.c::sync_mft_mirror_umount(). We currently will just
leave the volume dirty on umount if the final iput(vol->mft_ino)
causes a write of any mirrored mft records due to the mft mirror
- Enable the code for setting the NT4 compatibility flag when we start
making NTFS 1.2 specific modifications.
+2.1.25 - (Almost) fully implement write(2) and truncate(2).
+
+ - Change ntfs_map_runlist_nolock(), ntfs_attr_find_vcn_nolock() and
+ {__,}ntfs_cluster_free() to also take an optional attribute search
+ context as argument. This allows calling these functions with the
+ mft record mapped. Update all callers.
+ - Fix potential deadlock in ntfs_mft_data_extend_allocation_nolock()
+ error handling by passing in the active search context when calling
+ ntfs_cluster_free().
+ - Change ntfs_cluster_alloc() to take an extra boolean parameter
+ specifying whether the cluster are being allocated to extend an
+ attribute or to fill a hole.
+ - Change ntfs_attr_make_non_resident() to call ntfs_cluster_alloc()
+ with @is_extension set to TRUE and remove the runlist terminator
+ fixup code as this is now done by ntfs_cluster_alloc().
+ - Change ntfs_attr_make_non_resident to take the attribute value size
+ as an extra parameter. This is needed since we need to know the size
+ before we can map the mft record and our callers always know it. The
+ reason we cannot simply read the size from the vfs inode i_size is
+ that this is not necessarily uptodate. This happens when
+ ntfs_attr_make_non_resident() is called in the ->truncate call path.
+ - Fix ntfs_attr_make_non_resident() to update the vfs inode i_blocks
+ which is zero for a resident attribute but should no longer be zero
+ once the attribute is non-resident as it then has real clusters
+ allocated.
+ - Add fs/ntfs/attrib.[hc]::ntfs_attr_extend_allocation(), a function to
+ extend the allocation of an attributes. Optionally, the data size,
+ but not the initialized size can be extended, too.
+ - Implement fs/ntfs/inode.[hc]::ntfs_truncate(). It only supports
+ uncompressed and unencrypted files and it never creates sparse files
+ at least for the moment (making a file sparse requires us to modify
+ its directory entries and we do not support directory operations at
+ the moment). Also, support for highly fragmented files, i.e. ones
+ whose data attribute is split across multiple extents, is severly
+ limited. When such a case is encountered, EOPNOTSUPP is returned.
+ - Enable ATTR_SIZE attribute changes in ntfs_setattr(). This completes
+ the initial implementation of file truncation. Now both open(2)ing
+ a file with the O_TRUNC flag and the {,f}truncate(2) system calls
+ will resize a file appropriately. The limitations are that only
+ uncompressed and unencrypted files are supported. Also, there is
+ only very limited support for highly fragmented files (the ones whose
+ $DATA attribute is split into multiple attribute extents).
+ - In attrib.c::ntfs_attr_set() call balance_dirty_pages_ratelimited()
+ and cond_resched() in the main loop as we could be dirtying a lot of
+ pages and this ensures we play nice with the VM and the system as a
+ whole.
+ - Implement file operations ->write, ->aio_write, ->writev for regular
+ files. This replaces the old use of generic_file_write(), et al and
+ the address space operations ->prepare_write and ->commit_write.
+ This means that both sparse and non-sparse (unencrypted and
+ uncompressed) files can now be extended using the normal write(2)
+ code path. There are two limitations at present and these are that
+ we never create sparse files and that we only have limited support
+ for highly fragmented files, i.e. ones whose data attribute is split
+ across multiple extents. When such a case is encountered,
+ EOPNOTSUPP is returned.
+ - $EA attributes can be both resident and non-resident.
+ - Use %z for size_t to fix compilation warnings. (Andrew Morton)
+ - Fix compilation warnings with gcc-4.0.2 on SUSE 10.0.
+ - Document extended attribute ($EA) NEED_EA flag. (Based on libntfs
+ patch by Yura Pakhuchiy.)
+
2.1.24 - Lots of bug fixes and support more clean journal states.
- Support journals ($LogFile) which have been modified by chkdsk. This
index.o inode.o mft.o mst.o namei.o runlist.o super.o sysctl.o \
unistr.o upcase.o
-EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.24\"
+EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.25\"
ifeq ($(CONFIG_NTFS_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
if (NInoEncrypted(ni)) {
unlock_page(page);
BUG_ON(ni->type != AT_DATA);
- ntfs_debug("Denying write access to encrypted "
- "file.");
+ ntfs_debug("Denying write access to encrypted file.");
return -EACCES;
}
/* Compressed data streams are handled in compress.c. */
/* Zero out of bounds area in the page cache page. */
memset(kaddr + attr_len, 0, PAGE_CACHE_SIZE - attr_len);
kunmap_atomic(kaddr, KM_USER0);
- flush_dcache_mft_record_page(ctx->ntfs_ino);
flush_dcache_page(page);
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
/* We are done with the page. */
end_page_writeback(page);
/* Finally, mark the mft record dirty, so it gets written back. */
return err;
}
-/**
- * ntfs_prepare_nonresident_write -
- *
- */
-static int ntfs_prepare_nonresident_write(struct page *page,
- unsigned from, unsigned to)
-{
- VCN vcn;
- LCN lcn;
- s64 initialized_size;
- loff_t i_size;
- sector_t block, ablock, iblock;
- struct inode *vi;
- ntfs_inode *ni;
- ntfs_volume *vol;
- runlist_element *rl;
- struct buffer_head *bh, *head, *wait[2], **wait_bh = wait;
- unsigned long flags;
- unsigned int vcn_ofs, block_start, block_end, blocksize;
- int err;
- BOOL is_retry;
- unsigned char blocksize_bits;
-
- vi = page->mapping->host;
- ni = NTFS_I(vi);
- vol = ni->vol;
-
- ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index "
- "0x%lx, from = %u, to = %u.", ni->mft_no, ni->type,
- page->index, from, to);
-
- BUG_ON(!NInoNonResident(ni));
-
- blocksize_bits = vi->i_blkbits;
- blocksize = 1 << blocksize_bits;
-
- /*
- * create_empty_buffers() will create uptodate/dirty buffers if the
- * page is uptodate/dirty.
- */
- if (!page_has_buffers(page))
- create_empty_buffers(page, blocksize, 0);
- bh = head = page_buffers(page);
- if (unlikely(!bh))
- return -ENOMEM;
-
- /* The first block in the page. */
- block = (s64)page->index << (PAGE_CACHE_SHIFT - blocksize_bits);
-
- read_lock_irqsave(&ni->size_lock, flags);
- /*
- * The first out of bounds block for the allocated size. No need to
- * round up as allocated_size is in multiples of cluster size and the
- * minimum cluster size is 512 bytes, which is equal to the smallest
- * blocksize.
- */
- ablock = ni->allocated_size >> blocksize_bits;
- i_size = i_size_read(vi);
- initialized_size = ni->initialized_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
-
- /* The last (fully or partially) initialized block. */
- iblock = initialized_size >> blocksize_bits;
-
- /* Loop through all the buffers in the page. */
- block_start = 0;
- rl = NULL;
- err = 0;
- do {
- block_end = block_start + blocksize;
- /*
- * If buffer @bh is outside the write, just mark it uptodate
- * if the page is uptodate and continue with the next buffer.
- */
- if (block_end <= from || block_start >= to) {
- if (PageUptodate(page)) {
- if (!buffer_uptodate(bh))
- set_buffer_uptodate(bh);
- }
- continue;
- }
- /*
- * @bh is at least partially being written to.
- * Make sure it is not marked as new.
- */
- //if (buffer_new(bh))
- // clear_buffer_new(bh);
-
- if (block >= ablock) {
- // TODO: block is above allocated_size, need to
- // allocate it. Best done in one go to accommodate not
- // only block but all above blocks up to and including:
- // ((page->index << PAGE_CACHE_SHIFT) + to + blocksize
- // - 1) >> blobksize_bits. Obviously will need to round
- // up to next cluster boundary, too. This should be
- // done with a helper function, so it can be reused.
- ntfs_error(vol->sb, "Writing beyond allocated size "
- "is not supported yet. Sorry.");
- err = -EOPNOTSUPP;
- goto err_out;
- // Need to update ablock.
- // Need to set_buffer_new() on all block bhs that are
- // newly allocated.
- }
- /*
- * Now we have enough allocated size to fulfill the whole
- * request, i.e. block < ablock is true.
- */
- if (unlikely((block >= iblock) &&
- (initialized_size < i_size))) {
- /*
- * If this page is fully outside initialized size, zero
- * out all pages between the current initialized size
- * and the current page. Just use ntfs_readpage() to do
- * the zeroing transparently.
- */
- if (block > iblock) {
- // TODO:
- // For each page do:
- // - read_cache_page()
- // Again for each page do:
- // - wait_on_page_locked()
- // - Check (PageUptodate(page) &&
- // !PageError(page))
- // Update initialized size in the attribute and
- // in the inode.
- // Again, for each page do:
- // __set_page_dirty_buffers();
- // page_cache_release()
- // We don't need to wait on the writes.
- // Update iblock.
- }
- /*
- * The current page straddles initialized size. Zero
- * all non-uptodate buffers and set them uptodate (and
- * dirty?). Note, there aren't any non-uptodate buffers
- * if the page is uptodate.
- * FIXME: For an uptodate page, the buffers may need to
- * be written out because they were not initialized on
- * disk before.
- */
- if (!PageUptodate(page)) {
- // TODO:
- // Zero any non-uptodate buffers up to i_size.
- // Set them uptodate and dirty.
- }
- // TODO:
- // Update initialized size in the attribute and in the
- // inode (up to i_size).
- // Update iblock.
- // FIXME: This is inefficient. Try to batch the two
- // size changes to happen in one go.
- ntfs_error(vol->sb, "Writing beyond initialized size "
- "is not supported yet. Sorry.");
- err = -EOPNOTSUPP;
- goto err_out;
- // Do NOT set_buffer_new() BUT DO clear buffer range
- // outside write request range.
- // set_buffer_uptodate() on complete buffers as well as
- // set_buffer_dirty().
- }
-
- /* Need to map unmapped buffers. */
- if (!buffer_mapped(bh)) {
- /* Unmapped buffer. Need to map it. */
- bh->b_bdev = vol->sb->s_bdev;
-
- /* Convert block into corresponding vcn and offset. */
- vcn = (VCN)block << blocksize_bits >>
- vol->cluster_size_bits;
- vcn_ofs = ((VCN)block << blocksize_bits) &
- vol->cluster_size_mask;
-
- is_retry = FALSE;
- if (!rl) {
-lock_retry_remap:
- down_read(&ni->runlist.lock);
- rl = ni->runlist.rl;
- }
- if (likely(rl != NULL)) {
- /* Seek to element containing target vcn. */
- while (rl->length && rl[1].vcn <= vcn)
- rl++;
- lcn = ntfs_rl_vcn_to_lcn(rl, vcn);
- } else
- lcn = LCN_RL_NOT_MAPPED;
- if (unlikely(lcn < 0)) {
- /*
- * We extended the attribute allocation above.
- * If we hit an ENOENT here it means that the
- * allocation was insufficient which is a bug.
- */
- BUG_ON(lcn == LCN_ENOENT);
-
- /* It is a hole, need to instantiate it. */
- if (lcn == LCN_HOLE) {
- // TODO: Instantiate the hole.
- // clear_buffer_new(bh);
- // unmap_underlying_metadata(bh->b_bdev,
- // bh->b_blocknr);
- // For non-uptodate buffers, need to
- // zero out the region outside the
- // request in this bh or all bhs,
- // depending on what we implemented
- // above.
- // Need to flush_dcache_page().
- // Or could use set_buffer_new()
- // instead?
- ntfs_error(vol->sb, "Writing into "
- "sparse regions is "
- "not supported yet. "
- "Sorry.");
- err = -EOPNOTSUPP;
- if (!rl)
- up_read(&ni->runlist.lock);
- goto err_out;
- } else if (!is_retry &&
- lcn == LCN_RL_NOT_MAPPED) {
- is_retry = TRUE;
- /*
- * Attempt to map runlist, dropping
- * lock for the duration.
- */
- up_read(&ni->runlist.lock);
- err = ntfs_map_runlist(ni, vcn);
- if (likely(!err))
- goto lock_retry_remap;
- rl = NULL;
- } else if (!rl)
- up_read(&ni->runlist.lock);
- /*
- * Failed to map the buffer, even after
- * retrying.
- */
- if (!err)
- err = -EIO;
- bh->b_blocknr = -1;
- ntfs_error(vol->sb, "Failed to write to inode "
- "0x%lx, attribute type 0x%x, "
- "vcn 0x%llx, offset 0x%x "
- "because its location on disk "
- "could not be determined%s "
- "(error code %i).",
- ni->mft_no, ni->type,
- (unsigned long long)vcn,
- vcn_ofs, is_retry ? " even "
- "after retrying" : "", err);
- goto err_out;
- }
- /* We now have a successful remap, i.e. lcn >= 0. */
-
- /* Setup buffer head to correct block. */
- bh->b_blocknr = ((lcn << vol->cluster_size_bits)
- + vcn_ofs) >> blocksize_bits;
- set_buffer_mapped(bh);
-
- // FIXME: Something analogous to this is needed for
- // each newly allocated block, i.e. BH_New.
- // FIXME: Might need to take this out of the
- // if (!buffer_mapped(bh)) {}, depending on how we
- // implement things during the allocated_size and
- // initialized_size extension code above.
- if (buffer_new(bh)) {
- clear_buffer_new(bh);
- unmap_underlying_metadata(bh->b_bdev,
- bh->b_blocknr);
- if (PageUptodate(page)) {
- set_buffer_uptodate(bh);
- continue;
- }
- /*
- * Page is _not_ uptodate, zero surrounding
- * region. NOTE: This is how we decide if to
- * zero or not!
- */
- if (block_end > to || block_start < from) {
- void *kaddr;
-
- kaddr = kmap_atomic(page, KM_USER0);
- if (block_end > to)
- memset(kaddr + to, 0,
- block_end - to);
- if (block_start < from)
- memset(kaddr + block_start, 0,
- from -
- block_start);
- flush_dcache_page(page);
- kunmap_atomic(kaddr, KM_USER0);
- }
- continue;
- }
- }
- /* @bh is mapped, set it uptodate if the page is uptodate. */
- if (PageUptodate(page)) {
- if (!buffer_uptodate(bh))
- set_buffer_uptodate(bh);
- continue;
- }
- /*
- * The page is not uptodate. The buffer is mapped. If it is not
- * uptodate, and it is only partially being written to, we need
- * to read the buffer in before the write, i.e. right now.
- */
- if (!buffer_uptodate(bh) &&
- (block_start < from || block_end > to)) {
- ll_rw_block(READ, 1, &bh);
- *wait_bh++ = bh;
- }
- } while (block++, block_start = block_end,
- (bh = bh->b_this_page) != head);
-
- /* Release the lock if we took it. */
- if (rl) {
- up_read(&ni->runlist.lock);
- rl = NULL;
- }
-
- /* If we issued read requests, let them complete. */
- while (wait_bh > wait) {
- wait_on_buffer(*--wait_bh);
- if (!buffer_uptodate(*wait_bh))
- return -EIO;
- }
-
- ntfs_debug("Done.");
- return 0;
-err_out:
- /*
- * Zero out any newly allocated blocks to avoid exposing stale data.
- * If BH_New is set, we know that the block was newly allocated in the
- * above loop.
- * FIXME: What about initialized_size increments? Have we done all the
- * required zeroing above? If not this error handling is broken, and
- * in particular the if (block_end <= from) check is completely bogus.
- */
- bh = head;
- block_start = 0;
- is_retry = FALSE;
- do {
- block_end = block_start + blocksize;
- if (block_end <= from)
- continue;
- if (block_start >= to)
- break;
- if (buffer_new(bh)) {
- void *kaddr;
-
- clear_buffer_new(bh);
- kaddr = kmap_atomic(page, KM_USER0);
- memset(kaddr + block_start, 0, bh->b_size);
- kunmap_atomic(kaddr, KM_USER0);
- set_buffer_uptodate(bh);
- mark_buffer_dirty(bh);
- is_retry = TRUE;
- }
- } while (block_start = block_end, (bh = bh->b_this_page) != head);
- if (is_retry)
- flush_dcache_page(page);
- if (rl)
- up_read(&ni->runlist.lock);
- return err;
-}
-
-/**
- * ntfs_prepare_write - prepare a page for receiving data
- *
- * This is called from generic_file_write() with i_sem held on the inode
- * (@page->mapping->host). The @page is locked but not kmap()ped. The source
- * data has not yet been copied into the @page.
- *
- * Need to extend the attribute/fill in holes if necessary, create blocks and
- * make partially overwritten blocks uptodate,
- *
- * i_size is not to be modified yet.
- *
- * Return 0 on success or -errno on error.
- *
- * Should be using block_prepare_write() [support for sparse files] or
- * cont_prepare_write() [no support for sparse files]. Cannot do that due to
- * ntfs specifics but can look at them for implementation guidance.
- *
- * Note: In the range, @from is inclusive and @to is exclusive, i.e. @from is
- * the first byte in the page that will be written to and @to is the first byte
- * after the last byte that will be written to.
- */
-static int ntfs_prepare_write(struct file *file, struct page *page,
- unsigned from, unsigned to)
-{
- s64 new_size;
- loff_t i_size;
- struct inode *vi = page->mapping->host;
- ntfs_inode *base_ni = NULL, *ni = NTFS_I(vi);
- ntfs_volume *vol = ni->vol;
- ntfs_attr_search_ctx *ctx = NULL;
- MFT_RECORD *m = NULL;
- ATTR_RECORD *a;
- u8 *kaddr;
- u32 attr_len;
- int err;
-
- ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index "
- "0x%lx, from = %u, to = %u.", vi->i_ino, ni->type,
- page->index, from, to);
- BUG_ON(!PageLocked(page));
- BUG_ON(from > PAGE_CACHE_SIZE);
- BUG_ON(to > PAGE_CACHE_SIZE);
- BUG_ON(from > to);
- BUG_ON(NInoMstProtected(ni));
- /*
- * If a previous ntfs_truncate() failed, repeat it and abort if it
- * fails again.
- */
- if (unlikely(NInoTruncateFailed(ni))) {
- down_write(&vi->i_alloc_sem);
- err = ntfs_truncate(vi);
- up_write(&vi->i_alloc_sem);
- if (err || NInoTruncateFailed(ni)) {
- if (!err)
- err = -EIO;
- goto err_out;
- }
- }
- /* If the attribute is not resident, deal with it elsewhere. */
- if (NInoNonResident(ni)) {
- /*
- * Only unnamed $DATA attributes can be compressed, encrypted,
- * and/or sparse.
- */
- if (ni->type == AT_DATA && !ni->name_len) {
- /* If file is encrypted, deny access, just like NT4. */
- if (NInoEncrypted(ni)) {
- ntfs_debug("Denying write access to encrypted "
- "file.");
- return -EACCES;
- }
- /* Compressed data streams are handled in compress.c. */
- if (NInoCompressed(ni)) {
- // TODO: Implement and replace this check with
- // return ntfs_write_compressed_block(page);
- ntfs_error(vi->i_sb, "Writing to compressed "
- "files is not supported yet. "
- "Sorry.");
- return -EOPNOTSUPP;
- }
- // TODO: Implement and remove this check.
- if (NInoSparse(ni)) {
- ntfs_error(vi->i_sb, "Writing to sparse files "
- "is not supported yet. Sorry.");
- return -EOPNOTSUPP;
- }
- }
- /* Normal data stream. */
- return ntfs_prepare_nonresident_write(page, from, to);
- }
- /*
- * Attribute is resident, implying it is not compressed, encrypted, or
- * sparse.
- */
- BUG_ON(page_has_buffers(page));
- new_size = ((s64)page->index << PAGE_CACHE_SHIFT) + to;
- /* If we do not need to resize the attribute allocation we are done. */
- if (new_size <= i_size_read(vi))
- goto done;
- /* Map, pin, and lock the (base) mft record. */
- if (!NInoAttr(ni))
- base_ni = ni;
- else
- base_ni = ni->ext.base_ntfs_ino;
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- m = NULL;
- ctx = NULL;
- goto err_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto err_out;
- }
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- goto err_out;
- }
- m = ctx->mrec;
- a = ctx->attr;
- /* The total length of the attribute value. */
- attr_len = le32_to_cpu(a->data.resident.value_length);
- /* Fix an eventual previous failure of ntfs_commit_write(). */
- i_size = i_size_read(vi);
- if (unlikely(attr_len > i_size)) {
- attr_len = i_size;
- a->data.resident.value_length = cpu_to_le32(attr_len);
- }
- /* If we do not need to resize the attribute allocation we are done. */
- if (new_size <= attr_len)
- goto done_unm;
- /* Check if new size is allowed in $AttrDef. */
- err = ntfs_attr_size_bounds_check(vol, ni->type, new_size);
- if (unlikely(err)) {
- if (err == -ERANGE) {
- ntfs_error(vol->sb, "Write would cause the inode "
- "0x%lx to exceed the maximum size for "
- "its attribute type (0x%x). Aborting "
- "write.", vi->i_ino,
- le32_to_cpu(ni->type));
- } else {
- ntfs_error(vol->sb, "Inode 0x%lx has unknown "
- "attribute type 0x%x. Aborting "
- "write.", vi->i_ino,
- le32_to_cpu(ni->type));
- err = -EIO;
- }
- goto err_out2;
- }
- /*
- * Extend the attribute record to be able to store the new attribute
- * size.
- */
- if (new_size >= vol->mft_record_size || ntfs_attr_record_resize(m, a,
- le16_to_cpu(a->data.resident.value_offset) +
- new_size)) {
- /* Not enough space in the mft record. */
- ntfs_error(vol->sb, "Not enough space in the mft record for "
- "the resized attribute value. This is not "
- "supported yet. Aborting write.");
- err = -EOPNOTSUPP;
- goto err_out2;
- }
- /*
- * We have enough space in the mft record to fit the write. This
- * implies the attribute is smaller than the mft record and hence the
- * attribute must be in a single page and hence page->index must be 0.
- */
- BUG_ON(page->index);
- /*
- * If the beginning of the write is past the old size, enlarge the
- * attribute value up to the beginning of the write and fill it with
- * zeroes.
- */
- if (from > attr_len) {
- memset((u8*)a + le16_to_cpu(a->data.resident.value_offset) +
- attr_len, 0, from - attr_len);
- a->data.resident.value_length = cpu_to_le32(from);
- /* Zero the corresponding area in the page as well. */
- if (PageUptodate(page)) {
- kaddr = kmap_atomic(page, KM_USER0);
- memset(kaddr + attr_len, 0, from - attr_len);
- kunmap_atomic(kaddr, KM_USER0);
- flush_dcache_page(page);
- }
- }
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
-done_unm:
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- /*
- * Because resident attributes are handled by memcpy() to/from the
- * corresponding MFT record, and because this form of i/o is byte
- * aligned rather than block aligned, there is no need to bring the
- * page uptodate here as in the non-resident case where we need to
- * bring the buffers straddled by the write uptodate before
- * generic_file_write() does the copying from userspace.
- *
- * We thus defer the uptodate bringing of the page region outside the
- * region written to to ntfs_commit_write(), which makes the code
- * simpler and saves one atomic kmap which is good.
- */
-done:
- ntfs_debug("Done.");
- return 0;
-err_out:
- if (err == -ENOMEM)
- ntfs_warning(vi->i_sb, "Error allocating memory required to "
- "prepare the write.");
- else {
- ntfs_error(vi->i_sb, "Resident attribute prepare write failed "
- "with error %i.", err);
- NVolSetErrors(vol);
- make_bad_inode(vi);
- }
-err_out2:
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(base_ni);
- return err;
-}
-
-/**
- * ntfs_commit_nonresident_write -
- *
- */
-static int ntfs_commit_nonresident_write(struct page *page,
- unsigned from, unsigned to)
-{
- s64 pos = ((s64)page->index << PAGE_CACHE_SHIFT) + to;
- struct inode *vi = page->mapping->host;
- struct buffer_head *bh, *head;
- unsigned int block_start, block_end, blocksize;
- BOOL partial;
-
- ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index "
- "0x%lx, from = %u, to = %u.", vi->i_ino,
- NTFS_I(vi)->type, page->index, from, to);
- blocksize = 1 << vi->i_blkbits;
-
- // FIXME: We need a whole slew of special cases in here for compressed
- // files for example...
- // For now, we know ntfs_prepare_write() would have failed so we can't
- // get here in any of the cases which we have to special case, so we
- // are just a ripped off, unrolled generic_commit_write().
-
- bh = head = page_buffers(page);
- block_start = 0;
- partial = FALSE;
- do {
- block_end = block_start + blocksize;
- if (block_end <= from || block_start >= to) {
- if (!buffer_uptodate(bh))
- partial = TRUE;
- } else {
- set_buffer_uptodate(bh);
- mark_buffer_dirty(bh);
- }
- } while (block_start = block_end, (bh = bh->b_this_page) != head);
- /*
- * If this is a partial write which happened to make all buffers
- * uptodate then we can optimize away a bogus ->readpage() for the next
- * read(). Here we 'discover' whether the page went uptodate as a
- * result of this (potentially partial) write.
- */
- if (!partial)
- SetPageUptodate(page);
- /*
- * Not convinced about this at all. See disparity comment above. For
- * now we know ntfs_prepare_write() would have failed in the write
- * exceeds i_size case, so this will never trigger which is fine.
- */
- if (pos > i_size_read(vi)) {
- ntfs_error(vi->i_sb, "Writing beyond the existing file size is "
- "not supported yet. Sorry.");
- return -EOPNOTSUPP;
- // vi->i_size = pos;
- // mark_inode_dirty(vi);
- }
- ntfs_debug("Done.");
- return 0;
-}
-
-/**
- * ntfs_commit_write - commit the received data
- *
- * This is called from generic_file_write() with i_sem held on the inode
- * (@page->mapping->host). The @page is locked but not kmap()ped. The source
- * data has already been copied into the @page. ntfs_prepare_write() has been
- * called before the data copied and it returned success so we can take the
- * results of various BUG checks and some error handling for granted.
- *
- * Need to mark modified blocks dirty so they get written out later when
- * ntfs_writepage() is invoked by the VM.
- *
- * Return 0 on success or -errno on error.
- *
- * Should be using generic_commit_write(). This marks buffers uptodate and
- * dirty, sets the page uptodate if all buffers in the page are uptodate, and
- * updates i_size if the end of io is beyond i_size. In that case, it also
- * marks the inode dirty.
- *
- * Cannot use generic_commit_write() due to ntfs specialities but can look at
- * it for implementation guidance.
- *
- * If things have gone as outlined in ntfs_prepare_write(), then we do not
- * need to do any page content modifications here at all, except in the write
- * to resident attribute case, where we need to do the uptodate bringing here
- * which we combine with the copying into the mft record which means we save
- * one atomic kmap.
- */
-static int ntfs_commit_write(struct file *file, struct page *page,
- unsigned from, unsigned to)
-{
- struct inode *vi = page->mapping->host;
- ntfs_inode *base_ni, *ni = NTFS_I(vi);
- char *kaddr, *kattr;
- ntfs_attr_search_ctx *ctx;
- MFT_RECORD *m;
- ATTR_RECORD *a;
- u32 attr_len;
- int err;
-
- ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index "
- "0x%lx, from = %u, to = %u.", vi->i_ino, ni->type,
- page->index, from, to);
- /* If the attribute is not resident, deal with it elsewhere. */
- if (NInoNonResident(ni)) {
- /* Only unnamed $DATA attributes can be compressed/encrypted. */
- if (ni->type == AT_DATA && !ni->name_len) {
- /* Encrypted files need separate handling. */
- if (NInoEncrypted(ni)) {
- // We never get here at present!
- BUG();
- }
- /* Compressed data streams are handled in compress.c. */
- if (NInoCompressed(ni)) {
- // TODO: Implement this!
- // return ntfs_write_compressed_block(page);
- // We never get here at present!
- BUG();
- }
- }
- /* Normal data stream. */
- return ntfs_commit_nonresident_write(page, from, to);
- }
- /*
- * Attribute is resident, implying it is not compressed, encrypted, or
- * sparse.
- */
- if (!NInoAttr(ni))
- base_ni = ni;
- else
- base_ni = ni->ext.base_ntfs_ino;
- /* Map, pin, and lock the mft record. */
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- m = NULL;
- ctx = NULL;
- goto err_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto err_out;
- }
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- goto err_out;
- }
- a = ctx->attr;
- /* The total length of the attribute value. */
- attr_len = le32_to_cpu(a->data.resident.value_length);
- BUG_ON(from > attr_len);
- kattr = (u8*)a + le16_to_cpu(a->data.resident.value_offset);
- kaddr = kmap_atomic(page, KM_USER0);
- /* Copy the received data from the page to the mft record. */
- memcpy(kattr + from, kaddr + from, to - from);
- /* Update the attribute length if necessary. */
- if (to > attr_len) {
- attr_len = to;
- a->data.resident.value_length = cpu_to_le32(attr_len);
- }
- /*
- * If the page is not uptodate, bring the out of bounds area(s)
- * uptodate by copying data from the mft record to the page.
- */
- if (!PageUptodate(page)) {
- if (from > 0)
- memcpy(kaddr, kattr, from);
- if (to < attr_len)
- memcpy(kaddr + to, kattr + to, attr_len - to);
- /* Zero the region outside the end of the attribute value. */
- if (attr_len < PAGE_CACHE_SIZE)
- memset(kaddr + attr_len, 0, PAGE_CACHE_SIZE - attr_len);
- /*
- * The probability of not having done any of the above is
- * extremely small, so we just flush unconditionally.
- */
- flush_dcache_page(page);
- SetPageUptodate(page);
- }
- kunmap_atomic(kaddr, KM_USER0);
- /* Update i_size if necessary. */
- if (i_size_read(vi) < attr_len) {
- unsigned long flags;
-
- write_lock_irqsave(&ni->size_lock, flags);
- ni->allocated_size = ni->initialized_size = attr_len;
- i_size_write(vi, attr_len);
- write_unlock_irqrestore(&ni->size_lock, flags);
- }
- /* Mark the mft record dirty, so it gets written back. */
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- ntfs_debug("Done.");
- return 0;
-err_out:
- if (err == -ENOMEM) {
- ntfs_warning(vi->i_sb, "Error allocating memory required to "
- "commit the write.");
- if (PageUptodate(page)) {
- ntfs_warning(vi->i_sb, "Page is uptodate, setting "
- "dirty so the write will be retried "
- "later on by the VM.");
- /*
- * Put the page on mapping->dirty_pages, but leave its
- * buffers' dirty state as-is.
- */
- __set_page_dirty_nobuffers(page);
- err = 0;
- } else
- ntfs_error(vi->i_sb, "Page is not uptodate. Written "
- "data has been lost.");
- } else {
- ntfs_error(vi->i_sb, "Resident attribute commit write failed "
- "with error %i.", err);
- NVolSetErrors(ni->vol);
- make_bad_inode(vi);
- }
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(base_ni);
- return err;
-}
-
#endif /* NTFS_RW */
/**
disk request queue. */
#ifdef NTFS_RW
.writepage = ntfs_writepage, /* Write dirty page to disk. */
- .prepare_write = ntfs_prepare_write, /* Prepare page and buffers
- ready to receive data. */
- .commit_write = ntfs_commit_write, /* Commit received data. */
#endif /* NTFS_RW */
};
*/
#include <linux/buffer_head.h>
+#include <linux/sched.h>
#include <linux/swap.h>
+#include <linux/writeback.h>
#include "attrib.h"
#include "debug.h"
* ntfs_map_runlist_nolock - map (a part of) a runlist of an ntfs inode
* @ni: ntfs inode for which to map (part of) a runlist
* @vcn: map runlist part containing this vcn
+ * @ctx: active attribute search context if present or NULL if not
*
* Map the part of a runlist containing the @vcn of the ntfs inode @ni.
*
+ * If @ctx is specified, it is an active search context of @ni and its base mft
+ * record. This is needed when ntfs_map_runlist_nolock() encounters unmapped
+ * runlist fragments and allows their mapping. If you do not have the mft
+ * record mapped, you can specify @ctx as NULL and ntfs_map_runlist_nolock()
+ * will perform the necessary mapping and unmapping.
+ *
+ * Note, ntfs_map_runlist_nolock() saves the state of @ctx on entry and
+ * restores it before returning. Thus, @ctx will be left pointing to the same
+ * attribute on return as on entry. However, the actual pointers in @ctx may
+ * point to different memory locations on return, so you must remember to reset
+ * any cached pointers from the @ctx, i.e. after the call to
+ * ntfs_map_runlist_nolock(), you will probably want to do:
+ * m = ctx->mrec;
+ * a = ctx->attr;
+ * Assuming you cache ctx->attr in a variable @a of type ATTR_RECORD * and that
+ * you cache ctx->mrec in a variable @m of type MFT_RECORD *.
+ *
* Return 0 on success and -errno on error. There is one special error code
* which is not an error as such. This is -ENOENT. It means that @vcn is out
* of bounds of the runlist.
* Note the runlist can be NULL after this function returns if @vcn is zero and
* the attribute has zero allocated size, i.e. there simply is no runlist.
*
- * Locking: - The runlist must be locked for writing.
- * - This function modifies the runlist.
+ * WARNING: If @ctx is supplied, regardless of whether success or failure is
+ * returned, you need to check IS_ERR(@ctx->mrec) and if TRUE the @ctx
+ * is no longer valid, i.e. you need to either call
+ * ntfs_attr_reinit_search_ctx() or ntfs_attr_put_search_ctx() on it.
+ * In that case PTR_ERR(@ctx->mrec) will give you the error code for
+ * why the mapping of the old inode failed.
+ *
+ * Locking: - The runlist described by @ni must be locked for writing on entry
+ * and is locked on return. Note the runlist will be modified.
+ * - If @ctx is NULL, the base mft record of @ni must not be mapped on
+ * entry and it will be left unmapped on return.
+ * - If @ctx is not NULL, the base mft record must be mapped on entry
+ * and it will be left mapped on return.
*/
-int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn)
+int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn, ntfs_attr_search_ctx *ctx)
{
VCN end_vcn;
+ unsigned long flags;
ntfs_inode *base_ni;
MFT_RECORD *m;
ATTR_RECORD *a;
- ntfs_attr_search_ctx *ctx;
runlist_element *rl;
- unsigned long flags;
+ struct page *put_this_page = NULL;
int err = 0;
+ BOOL ctx_is_temporary, ctx_needs_reset;
+ ntfs_attr_search_ctx old_ctx = { NULL, };
ntfs_debug("Mapping runlist part containing vcn 0x%llx.",
(unsigned long long)vcn);
base_ni = ni;
else
base_ni = ni->ext.base_ntfs_ino;
- m = map_mft_record(base_ni);
- if (IS_ERR(m))
- return PTR_ERR(m);
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto err_out;
+ if (!ctx) {
+ ctx_is_temporary = ctx_needs_reset = TRUE;
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m))
+ return PTR_ERR(m);
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+ } else {
+ VCN allocated_size_vcn;
+
+ BUG_ON(IS_ERR(ctx->mrec));
+ a = ctx->attr;
+ BUG_ON(!a->non_resident);
+ ctx_is_temporary = FALSE;
+ end_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
+ read_lock_irqsave(&ni->size_lock, flags);
+ allocated_size_vcn = ni->allocated_size >>
+ ni->vol->cluster_size_bits;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (!a->data.non_resident.lowest_vcn && end_vcn <= 0)
+ end_vcn = allocated_size_vcn - 1;
+ /*
+ * If we already have the attribute extent containing @vcn in
+ * @ctx, no need to look it up again. We slightly cheat in
+ * that if vcn exceeds the allocated size, we will refuse to
+ * map the runlist below, so there is definitely no need to get
+ * the right attribute extent.
+ */
+ if (vcn >= allocated_size_vcn || (a->type == ni->type &&
+ a->name_length == ni->name_len &&
+ !memcmp((u8*)a + le16_to_cpu(a->name_offset),
+ ni->name, ni->name_len) &&
+ sle64_to_cpu(a->data.non_resident.lowest_vcn)
+ <= vcn && end_vcn >= vcn))
+ ctx_needs_reset = FALSE;
+ else {
+ /* Save the old search context. */
+ old_ctx = *ctx;
+ /*
+ * If the currently mapped (extent) inode is not the
+ * base inode we will unmap it when we reinitialize the
+ * search context which means we need to get a
+ * reference to the page containing the mapped mft
+ * record so we do not accidentally drop changes to the
+ * mft record when it has not been marked dirty yet.
+ */
+ if (old_ctx.base_ntfs_ino && old_ctx.ntfs_ino !=
+ old_ctx.base_ntfs_ino) {
+ put_this_page = old_ctx.ntfs_ino->page;
+ page_cache_get(put_this_page);
+ }
+ /*
+ * Reinitialize the search context so we can lookup the
+ * needed attribute extent.
+ */
+ ntfs_attr_reinit_search_ctx(ctx);
+ ctx_needs_reset = TRUE;
+ }
}
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, vcn, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- goto err_out;
+ if (ctx_needs_reset) {
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, vcn, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ err = -EIO;
+ goto err_out;
+ }
+ BUG_ON(!ctx->attr->non_resident);
}
a = ctx->attr;
/*
* ntfs_mapping_pairs_decompress() fails.
*/
end_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn) + 1;
- if (unlikely(!a->data.non_resident.lowest_vcn && end_vcn <= 1)) {
- read_lock_irqsave(&ni->size_lock, flags);
- end_vcn = ni->allocated_size >> ni->vol->cluster_size_bits;
- read_unlock_irqrestore(&ni->size_lock, flags);
- }
+ if (!a->data.non_resident.lowest_vcn && end_vcn == 1)
+ end_vcn = sle64_to_cpu(a->data.non_resident.allocated_size) >>
+ ni->vol->cluster_size_bits;
if (unlikely(vcn >= end_vcn)) {
err = -ENOENT;
goto err_out;
else
ni->runlist.rl = rl;
err_out:
- if (likely(ctx))
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
+ if (ctx_is_temporary) {
+ if (likely(ctx))
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ } else if (ctx_needs_reset) {
+ /*
+ * If there is no attribute list, restoring the search context
+ * is acomplished simply by copying the saved context back over
+ * the caller supplied context. If there is an attribute list,
+ * things are more complicated as we need to deal with mapping
+ * of mft records and resulting potential changes in pointers.
+ */
+ if (NInoAttrList(base_ni)) {
+ /*
+ * If the currently mapped (extent) inode is not the
+ * one we had before, we need to unmap it and map the
+ * old one.
+ */
+ if (ctx->ntfs_ino != old_ctx.ntfs_ino) {
+ /*
+ * If the currently mapped inode is not the
+ * base inode, unmap it.
+ */
+ if (ctx->base_ntfs_ino && ctx->ntfs_ino !=
+ ctx->base_ntfs_ino) {
+ unmap_extent_mft_record(ctx->ntfs_ino);
+ ctx->mrec = ctx->base_mrec;
+ BUG_ON(!ctx->mrec);
+ }
+ /*
+ * If the old mapped inode is not the base
+ * inode, map it.
+ */
+ if (old_ctx.base_ntfs_ino &&
+ old_ctx.ntfs_ino !=
+ old_ctx.base_ntfs_ino) {
+retry_map:
+ ctx->mrec = map_mft_record(
+ old_ctx.ntfs_ino);
+ /*
+ * Something bad has happened. If out
+ * of memory retry till it succeeds.
+ * Any other errors are fatal and we
+ * return the error code in ctx->mrec.
+ * Let the caller deal with it... We
+ * just need to fudge things so the
+ * caller can reinit and/or put the
+ * search context safely.
+ */
+ if (IS_ERR(ctx->mrec)) {
+ if (PTR_ERR(ctx->mrec) ==
+ -ENOMEM) {
+ schedule();
+ goto retry_map;
+ } else
+ old_ctx.ntfs_ino =
+ old_ctx.
+ base_ntfs_ino;
+ }
+ }
+ }
+ /* Update the changed pointers in the saved context. */
+ if (ctx->mrec != old_ctx.mrec) {
+ if (!IS_ERR(ctx->mrec))
+ old_ctx.attr = (ATTR_RECORD*)(
+ (u8*)ctx->mrec +
+ ((u8*)old_ctx.attr -
+ (u8*)old_ctx.mrec));
+ old_ctx.mrec = ctx->mrec;
+ }
+ }
+ /* Restore the search context to the saved one. */
+ *ctx = old_ctx;
+ /*
+ * We drop the reference on the page we took earlier. In the
+ * case that IS_ERR(ctx->mrec) is true this means we might lose
+ * some changes to the mft record that had been made between
+ * the last time it was marked dirty/written out and now. This
+ * at this stage is not a problem as the mapping error is fatal
+ * enough that the mft record cannot be written out anyway and
+ * the caller is very likely to shutdown the whole inode
+ * immediately and mark the volume dirty for chkdsk to pick up
+ * the pieces anyway.
+ */
+ if (put_this_page)
+ page_cache_release(put_this_page);
+ }
return err;
}
* of bounds of the runlist.
*
* Locking: - The runlist must be unlocked on entry and is unlocked on return.
- * - This function takes the runlist lock for writing and modifies the
- * runlist.
+ * - This function takes the runlist lock for writing and may modify
+ * the runlist.
*/
int ntfs_map_runlist(ntfs_inode *ni, VCN vcn)
{
/* Make sure someone else didn't do the work while we were sleeping. */
if (likely(ntfs_rl_vcn_to_lcn(ni->runlist.rl, vcn) <=
LCN_RL_NOT_MAPPED))
- err = ntfs_map_runlist_nolock(ni, vcn);
+ err = ntfs_map_runlist_nolock(ni, vcn, NULL);
up_write(&ni->runlist.lock);
return err;
}
goto retry_remap;
}
}
- err = ntfs_map_runlist_nolock(ni, vcn);
+ err = ntfs_map_runlist_nolock(ni, vcn, NULL);
if (!write_locked) {
up_write(&ni->runlist.lock);
down_read(&ni->runlist.lock);
/**
* ntfs_attr_find_vcn_nolock - find a vcn in the runlist of an ntfs inode
- * @ni: ntfs inode describing the runlist to search
- * @vcn: vcn to find
- * @write_locked: true if the runlist is locked for writing
+ * @ni: ntfs inode describing the runlist to search
+ * @vcn: vcn to find
+ * @ctx: active attribute search context if present or NULL if not
*
* Find the virtual cluster number @vcn in the runlist described by the ntfs
* inode @ni and return the address of the runlist element containing the @vcn.
* If the @vcn is not mapped yet, the attempt is made to map the attribute
* extent containing the @vcn and the vcn to lcn conversion is retried.
*
- * If @write_locked is true the caller has locked the runlist for writing and
- * if false for reading.
- *
+ * If @ctx is specified, it is an active search context of @ni and its base mft
+ * record. This is needed when ntfs_attr_find_vcn_nolock() encounters unmapped
+ * runlist fragments and allows their mapping. If you do not have the mft
+ * record mapped, you can specify @ctx as NULL and ntfs_attr_find_vcn_nolock()
+ * will perform the necessary mapping and unmapping.
+ *
+ * Note, ntfs_attr_find_vcn_nolock() saves the state of @ctx on entry and
+ * restores it before returning. Thus, @ctx will be left pointing to the same
+ * attribute on return as on entry. However, the actual pointers in @ctx may
+ * point to different memory locations on return, so you must remember to reset
+ * any cached pointers from the @ctx, i.e. after the call to
+ * ntfs_attr_find_vcn_nolock(), you will probably want to do:
+ * m = ctx->mrec;
+ * a = ctx->attr;
+ * Assuming you cache ctx->attr in a variable @a of type ATTR_RECORD * and that
+ * you cache ctx->mrec in a variable @m of type MFT_RECORD *.
* Note you need to distinguish between the lcn of the returned runlist element
* being >= 0 and LCN_HOLE. In the later case you have to return zeroes on
* read and allocate clusters on write.
* -ENOMEM - Not enough memory to map runlist.
* -EIO - Critical error (runlist/file is corrupt, i/o error, etc).
*
- * Locking: - The runlist must be locked on entry and is left locked on return.
- * - If @write_locked is FALSE, i.e. the runlist is locked for reading,
- * the lock may be dropped inside the function so you cannot rely on
- * the runlist still being the same when this function returns.
+ * WARNING: If @ctx is supplied, regardless of whether success or failure is
+ * returned, you need to check IS_ERR(@ctx->mrec) and if TRUE the @ctx
+ * is no longer valid, i.e. you need to either call
+ * ntfs_attr_reinit_search_ctx() or ntfs_attr_put_search_ctx() on it.
+ * In that case PTR_ERR(@ctx->mrec) will give you the error code for
+ * why the mapping of the old inode failed.
+ *
+ * Locking: - The runlist described by @ni must be locked for writing on entry
+ * and is locked on return. Note the runlist may be modified when
+ * needed runlist fragments need to be mapped.
+ * - If @ctx is NULL, the base mft record of @ni must not be mapped on
+ * entry and it will be left unmapped on return.
+ * - If @ctx is not NULL, the base mft record must be mapped on entry
+ * and it will be left mapped on return.
*/
runlist_element *ntfs_attr_find_vcn_nolock(ntfs_inode *ni, const VCN vcn,
- const BOOL write_locked)
+ ntfs_attr_search_ctx *ctx)
{
unsigned long flags;
runlist_element *rl;
int err = 0;
BOOL is_retry = FALSE;
- ntfs_debug("Entering for i_ino 0x%lx, vcn 0x%llx, %s_locked.",
- ni->mft_no, (unsigned long long)vcn,
- write_locked ? "write" : "read");
+ ntfs_debug("Entering for i_ino 0x%lx, vcn 0x%llx, with%s ctx.",
+ ni->mft_no, (unsigned long long)vcn, ctx ? "" : "out");
BUG_ON(!ni);
BUG_ON(!NInoNonResident(ni));
BUG_ON(vcn < 0);
}
if (!err && !is_retry) {
/*
- * The @vcn is in an unmapped region, map the runlist and
- * retry.
+ * If the search context is invalid we cannot map the unmapped
+ * region.
*/
- if (!write_locked) {
- up_read(&ni->runlist.lock);
- down_write(&ni->runlist.lock);
- if (unlikely(ntfs_rl_vcn_to_lcn(ni->runlist.rl, vcn) !=
- LCN_RL_NOT_MAPPED)) {
- up_write(&ni->runlist.lock);
- down_read(&ni->runlist.lock);
+ if (IS_ERR(ctx->mrec))
+ err = PTR_ERR(ctx->mrec);
+ else {
+ /*
+ * The @vcn is in an unmapped region, map the runlist
+ * and retry.
+ */
+ err = ntfs_map_runlist_nolock(ni, vcn, ctx);
+ if (likely(!err)) {
+ is_retry = TRUE;
goto retry_remap;
}
}
- err = ntfs_map_runlist_nolock(ni, vcn);
- if (!write_locked) {
- up_write(&ni->runlist.lock);
- down_read(&ni->runlist.lock);
- }
- if (likely(!err)) {
- is_retry = TRUE;
- goto retry_remap;
- }
- /*
- * -EINVAL coming from a failed mapping attempt is equivalent
- * to i/o error for us as it should not happen in our code
- * paths.
- */
if (err == -EINVAL)
err = -EIO;
} else if (!err)
ntfs_inode *base_ni;
ntfs_debug("Entering.");
+ BUG_ON(IS_ERR(ctx->mrec));
if (ctx->base_ntfs_ino)
base_ni = ctx->base_ntfs_ino;
else
*/
int ntfs_attr_can_be_resident(const ntfs_volume *vol, const ATTR_TYPE type)
{
- if (type == AT_INDEX_ALLOCATION || type == AT_EA)
+ if (type == AT_INDEX_ALLOCATION)
return -EPERM;
return 0;
}
/**
* ntfs_attr_make_non_resident - convert a resident to a non-resident attribute
* @ni: ntfs inode describing the attribute to convert
+ * @data_size: size of the resident data to copy to the non-resident attribute
*
* Convert the resident ntfs attribute described by the ntfs inode @ni to a
* non-resident one.
*
+ * @data_size must be equal to the attribute value size. This is needed since
+ * we need to know the size before we can map the mft record and our callers
+ * always know it. The reason we cannot simply read the size from the vfs
+ * inode i_size is that this is not necessarily uptodate. This happens when
+ * ntfs_attr_make_non_resident() is called in the ->truncate call path(s).
+ *
* Return 0 on success and -errno on error. The following error return codes
* are defined:
* -EPERM - The attribute is not allowed to be non-resident.
*
* Locking: - The caller must hold i_sem on the inode.
*/
-int ntfs_attr_make_non_resident(ntfs_inode *ni)
+int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size)
{
s64 new_size;
struct inode *vi = VFS_I(ni);
* The size needs to be aligned to a cluster boundary for allocation
* purposes.
*/
- new_size = (i_size_read(vi) + vol->cluster_size - 1) &
+ new_size = (data_size + vol->cluster_size - 1) &
~(vol->cluster_size - 1);
if (new_size > 0) {
- runlist_element *rl2;
-
/*
* Will need the page later and since the page lock nests
* outside all ntfs locks, we need to get the page now.
return -ENOMEM;
/* Start by allocating clusters to hold the attribute value. */
rl = ntfs_cluster_alloc(vol, 0, new_size >>
- vol->cluster_size_bits, -1, DATA_ZONE);
+ vol->cluster_size_bits, -1, DATA_ZONE, TRUE);
if (IS_ERR(rl)) {
err = PTR_ERR(rl);
ntfs_debug("Failed to allocate cluster%s, error code "
err);
goto page_err_out;
}
- /* Change the runlist terminator to LCN_ENOENT. */
- rl2 = rl;
- while (rl2->length)
- rl2++;
- BUG_ON(rl2->lcn != LCN_RL_NOT_MAPPED);
- rl2->lcn = LCN_ENOENT;
} else {
rl = NULL;
page = NULL;
* attribute value.
*/
attr_size = le32_to_cpu(a->data.resident.value_length);
- BUG_ON(attr_size != i_size_read(vi));
+ BUG_ON(attr_size != data_size);
if (page && !PageUptodate(page)) {
kaddr = kmap_atomic(page, KM_USER0);
memcpy(kaddr, (u8*)a +
ffs(ni->itype.compressed.block_size) - 1;
ni->itype.compressed.block_clusters = 1U <<
a->data.non_resident.compression_unit;
- }
+ vi->i_blocks = ni->itype.compressed.size >> 9;
+ } else
+ vi->i_blocks = ni->allocated_size >> 9;
write_unlock_irqrestore(&ni->size_lock, flags);
/*
* This needs to be last since the address space operations ->readpage
return err;
}
+/**
+ * ntfs_attr_extend_allocation - extend the allocated space of an attribute
+ * @ni: ntfs inode of the attribute whose allocation to extend
+ * @new_alloc_size: new size in bytes to which to extend the allocation to
+ * @new_data_size: new size in bytes to which to extend the data to
+ * @data_start: beginning of region which is required to be non-sparse
+ *
+ * Extend the allocated space of an attribute described by the ntfs inode @ni
+ * to @new_alloc_size bytes. If @data_start is -1, the whole extension may be
+ * implemented as a hole in the file (as long as both the volume and the ntfs
+ * inode @ni have sparse support enabled). If @data_start is >= 0, then the
+ * region between the old allocated size and @data_start - 1 may be made sparse
+ * but the regions between @data_start and @new_alloc_size must be backed by
+ * actual clusters.
+ *
+ * If @new_data_size is -1, it is ignored. If it is >= 0, then the data size
+ * of the attribute is extended to @new_data_size. Note that the i_size of the
+ * vfs inode is not updated. Only the data size in the base attribute record
+ * is updated. The caller has to update i_size separately if this is required.
+ * WARNING: It is a BUG() for @new_data_size to be smaller than the old data
+ * size as well as for @new_data_size to be greater than @new_alloc_size.
+ *
+ * For resident attributes this involves resizing the attribute record and if
+ * necessary moving it and/or other attributes into extent mft records and/or
+ * converting the attribute to a non-resident attribute which in turn involves
+ * extending the allocation of a non-resident attribute as described below.
+ *
+ * For non-resident attributes this involves allocating clusters in the data
+ * zone on the volume (except for regions that are being made sparse) and
+ * extending the run list to describe the allocated clusters as well as
+ * updating the mapping pairs array of the attribute. This in turn involves
+ * resizing the attribute record and if necessary moving it and/or other
+ * attributes into extent mft records and/or splitting the attribute record
+ * into multiple extent attribute records.
+ *
+ * Also, the attribute list attribute is updated if present and in some of the
+ * above cases (the ones where extent mft records/attributes come into play),
+ * an attribute list attribute is created if not already present.
+ *
+ * Return the new allocated size on success and -errno on error. In the case
+ * that an error is encountered but a partial extension at least up to
+ * @data_start (if present) is possible, the allocation is partially extended
+ * and this is returned. This means the caller must check the returned size to
+ * determine if the extension was partial. If @data_start is -1 then partial
+ * allocations are not performed.
+ *
+ * WARNING: Do not call ntfs_attr_extend_allocation() for $MFT/$DATA.
+ *
+ * Locking: This function takes the runlist lock of @ni for writing as well as
+ * locking the mft record of the base ntfs inode. These locks are maintained
+ * throughout execution of the function. These locks are required so that the
+ * attribute can be resized safely and so that it can for example be converted
+ * from resident to non-resident safely.
+ *
+ * TODO: At present attribute list attribute handling is not implemented.
+ *
+ * TODO: At present it is not safe to call this function for anything other
+ * than the $DATA attribute(s) of an uncompressed and unencrypted file.
+ */
+s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size,
+ const s64 new_data_size, const s64 data_start)
+{
+ VCN vcn;
+ s64 ll, allocated_size, start = data_start;
+ struct inode *vi = VFS_I(ni);
+ ntfs_volume *vol = ni->vol;
+ ntfs_inode *base_ni;
+ MFT_RECORD *m;
+ ATTR_RECORD *a;
+ ntfs_attr_search_ctx *ctx;
+ runlist_element *rl, *rl2;
+ unsigned long flags;
+ int err, mp_size;
+ u32 attr_len = 0; /* Silence stupid gcc warning. */
+ BOOL mp_rebuilt;
+
+#ifdef NTFS_DEBUG
+ read_lock_irqsave(&ni->size_lock, flags);
+ allocated_size = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, "
+ "old_allocated_size 0x%llx, "
+ "new_allocated_size 0x%llx, new_data_size 0x%llx, "
+ "data_start 0x%llx.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type),
+ (unsigned long long)allocated_size,
+ (unsigned long long)new_alloc_size,
+ (unsigned long long)new_data_size,
+ (unsigned long long)start);
+#endif
+retry_extend:
+ /*
+ * For non-resident attributes, @start and @new_size need to be aligned
+ * to cluster boundaries for allocation purposes.
+ */
+ if (NInoNonResident(ni)) {
+ if (start > 0)
+ start &= ~(s64)vol->cluster_size_mask;
+ new_alloc_size = (new_alloc_size + vol->cluster_size - 1) &
+ ~(s64)vol->cluster_size_mask;
+ }
+ BUG_ON(new_data_size >= 0 && new_data_size > new_alloc_size);
+ /* Check if new size is allowed in $AttrDef. */
+ err = ntfs_attr_size_bounds_check(vol, ni->type, new_alloc_size);
+ if (unlikely(err)) {
+ /* Only emit errors when the write will fail completely. */
+ read_lock_irqsave(&ni->size_lock, flags);
+ allocated_size = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (start < 0 || start >= allocated_size) {
+ if (err == -ERANGE) {
+ ntfs_error(vol->sb, "Cannot extend allocation "
+ "of inode 0x%lx, attribute "
+ "type 0x%x, because the new "
+ "allocation would exceed the "
+ "maximum allowed size for "
+ "this attribute type.",
+ vi->i_ino, (unsigned)
+ le32_to_cpu(ni->type));
+ } else {
+ ntfs_error(vol->sb, "Cannot extend allocation "
+ "of inode 0x%lx, attribute "
+ "type 0x%x, because this "
+ "attribute type is not "
+ "defined on the NTFS volume. "
+ "Possible corruption! You "
+ "should run chkdsk!",
+ vi->i_ino, (unsigned)
+ le32_to_cpu(ni->type));
+ }
+ }
+ /* Translate error code to be POSIX conformant for write(2). */
+ if (err == -ERANGE)
+ err = -EFBIG;
+ else
+ err = -EIO;
+ return err;
+ }
+ if (!NInoAttr(ni))
+ base_ni = ni;
+ else
+ base_ni = ni->ext.base_ntfs_ino;
+ /*
+ * We will be modifying both the runlist (if non-resident) and the mft
+ * record so lock them both down.
+ */
+ down_write(&ni->runlist.lock);
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ m = NULL;
+ ctx = NULL;
+ goto err_out;
+ }
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+ read_lock_irqsave(&ni->size_lock, flags);
+ allocated_size = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ /*
+ * If non-resident, seek to the last extent. If resident, there is
+ * only one extent, so seek to that.
+ */
+ vcn = NInoNonResident(ni) ? allocated_size >> vol->cluster_size_bits :
+ 0;
+ /*
+ * Abort if someone did the work whilst we waited for the locks. If we
+ * just converted the attribute from resident to non-resident it is
+ * likely that exactly this has happened already. We cannot quite
+ * abort if we need to update the data size.
+ */
+ if (unlikely(new_alloc_size <= allocated_size)) {
+ ntfs_debug("Allocated size already exceeds requested size.");
+ new_alloc_size = allocated_size;
+ if (new_data_size < 0)
+ goto done;
+ /*
+ * We want the first attribute extent so that we can update the
+ * data size.
+ */
+ vcn = 0;
+ }
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, vcn, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ err = -EIO;
+ goto err_out;
+ }
+ m = ctx->mrec;
+ a = ctx->attr;
+ /* Use goto to reduce indentation. */
+ if (a->non_resident)
+ goto do_non_resident_extend;
+ BUG_ON(NInoNonResident(ni));
+ /* The total length of the attribute value. */
+ attr_len = le32_to_cpu(a->data.resident.value_length);
+ /*
+ * Extend the attribute record to be able to store the new attribute
+ * size. ntfs_attr_record_resize() will not do anything if the size is
+ * not changing.
+ */
+ if (new_alloc_size < vol->mft_record_size &&
+ !ntfs_attr_record_resize(m, a,
+ le16_to_cpu(a->data.resident.value_offset) +
+ new_alloc_size)) {
+ /* The resize succeeded! */
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->allocated_size = le32_to_cpu(a->length) -
+ le16_to_cpu(a->data.resident.value_offset);
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ if (new_data_size >= 0) {
+ BUG_ON(new_data_size < attr_len);
+ a->data.resident.value_length =
+ cpu_to_le32((u32)new_data_size);
+ }
+ goto flush_done;
+ }
+ /*
+ * We have to drop all the locks so we can call
+ * ntfs_attr_make_non_resident(). This could be optimised by try-
+ * locking the first page cache page and only if that fails dropping
+ * the locks, locking the page, and redoing all the locking and
+ * lookups. While this would be a huge optimisation, it is not worth
+ * it as this is definitely a slow code path.
+ */
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+ /*
+ * Not enough space in the mft record, try to make the attribute
+ * non-resident and if successful restart the extension process.
+ */
+ err = ntfs_attr_make_non_resident(ni, attr_len);
+ if (likely(!err))
+ goto retry_extend;
+ /*
+ * Could not make non-resident. If this is due to this not being
+ * permitted for this attribute type or there not being enough space,
+ * try to make other attributes non-resident. Otherwise fail.
+ */
+ if (unlikely(err != -EPERM && err != -ENOSPC)) {
+ /* Only emit errors when the write will fail completely. */
+ read_lock_irqsave(&ni->size_lock, flags);
+ allocated_size = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (start < 0 || start >= allocated_size)
+ ntfs_error(vol->sb, "Cannot extend allocation of "
+ "inode 0x%lx, attribute type 0x%x, "
+ "because the conversion from resident "
+ "to non-resident attribute failed "
+ "with error code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ if (err != -ENOMEM)
+ err = -EIO;
+ goto conv_err_out;
+ }
+ /* TODO: Not implemented from here, abort. */
+ read_lock_irqsave(&ni->size_lock, flags);
+ allocated_size = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (start < 0 || start >= allocated_size) {
+ if (err == -ENOSPC)
+ ntfs_error(vol->sb, "Not enough space in the mft "
+ "record/on disk for the non-resident "
+ "attribute value. This case is not "
+ "implemented yet.");
+ else /* if (err == -EPERM) */
+ ntfs_error(vol->sb, "This attribute type may not be "
+ "non-resident. This case is not "
+ "implemented yet.");
+ }
+ err = -EOPNOTSUPP;
+ goto conv_err_out;
+#if 0
+ // TODO: Attempt to make other attributes non-resident.
+ if (!err)
+ goto do_resident_extend;
+ /*
+ * Both the attribute list attribute and the standard information
+ * attribute must remain in the base inode. Thus, if this is one of
+ * these attributes, we have to try to move other attributes out into
+ * extent mft records instead.
+ */
+ if (ni->type == AT_ATTRIBUTE_LIST ||
+ ni->type == AT_STANDARD_INFORMATION) {
+ // TODO: Attempt to move other attributes into extent mft
+ // records.
+ err = -EOPNOTSUPP;
+ if (!err)
+ goto do_resident_extend;
+ goto err_out;
+ }
+ // TODO: Attempt to move this attribute to an extent mft record, but
+ // only if it is not already the only attribute in an mft record in
+ // which case there would be nothing to gain.
+ err = -EOPNOTSUPP;
+ if (!err)
+ goto do_resident_extend;
+ /* There is nothing we can do to make enough space. )-: */
+ goto err_out;
+#endif
+do_non_resident_extend:
+ BUG_ON(!NInoNonResident(ni));
+ if (new_alloc_size == allocated_size) {
+ BUG_ON(vcn);
+ goto alloc_done;
+ }
+ /*
+ * If the data starts after the end of the old allocation, this is a
+ * $DATA attribute and sparse attributes are enabled on the volume and
+ * for this inode, then create a sparse region between the old
+ * allocated size and the start of the data. Otherwise simply proceed
+ * with filling the whole space between the old allocated size and the
+ * new allocated size with clusters.
+ */
+ if ((start >= 0 && start <= allocated_size) || ni->type != AT_DATA ||
+ !NVolSparseEnabled(vol) || NInoSparseDisabled(ni))
+ goto skip_sparse;
+ // TODO: This is not implemented yet. We just fill in with real
+ // clusters for now...
+ ntfs_debug("Inserting holes is not-implemented yet. Falling back to "
+ "allocating real clusters instead.");
+skip_sparse:
+ rl = ni->runlist.rl;
+ if (likely(rl)) {
+ /* Seek to the end of the runlist. */
+ while (rl->length)
+ rl++;
+ }
+ /* If this attribute extent is not mapped, map it now. */
+ if (unlikely(!rl || rl->lcn == LCN_RL_NOT_MAPPED ||
+ (rl->lcn == LCN_ENOENT && rl > ni->runlist.rl &&
+ (rl-1)->lcn == LCN_RL_NOT_MAPPED))) {
+ if (!rl && !allocated_size)
+ goto first_alloc;
+ rl = ntfs_mapping_pairs_decompress(vol, a, ni->runlist.rl);
+ if (IS_ERR(rl)) {
+ err = PTR_ERR(rl);
+ if (start < 0 || start >= allocated_size)
+ ntfs_error(vol->sb, "Cannot extend allocation "
+ "of inode 0x%lx, attribute "
+ "type 0x%x, because the "
+ "mapping of a runlist "
+ "fragment failed with error "
+ "code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type),
+ err);
+ if (err != -ENOMEM)
+ err = -EIO;
+ goto err_out;
+ }
+ ni->runlist.rl = rl;
+ /* Seek to the end of the runlist. */
+ while (rl->length)
+ rl++;
+ }
+ /*
+ * We now know the runlist of the last extent is mapped and @rl is at
+ * the end of the runlist. We want to begin allocating clusters
+ * starting at the last allocated cluster to reduce fragmentation. If
+ * there are no valid LCNs in the attribute we let the cluster
+ * allocator choose the starting cluster.
+ */
+ /* If the last LCN is a hole or simillar seek back to last real LCN. */
+ while (rl->lcn < 0 && rl > ni->runlist.rl)
+ rl--;
+first_alloc:
+ // FIXME: Need to implement partial allocations so at least part of the
+ // write can be performed when start >= 0. (Needed for POSIX write(2)
+ // conformance.)
+ rl2 = ntfs_cluster_alloc(vol, allocated_size >> vol->cluster_size_bits,
+ (new_alloc_size - allocated_size) >>
+ vol->cluster_size_bits, (rl && (rl->lcn >= 0)) ?
+ rl->lcn + rl->length : -1, DATA_ZONE, TRUE);
+ if (IS_ERR(rl2)) {
+ err = PTR_ERR(rl2);
+ if (start < 0 || start >= allocated_size)
+ ntfs_error(vol->sb, "Cannot extend allocation of "
+ "inode 0x%lx, attribute type 0x%x, "
+ "because the allocation of clusters "
+ "failed with error code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ if (err != -ENOMEM && err != -ENOSPC)
+ err = -EIO;
+ goto err_out;
+ }
+ rl = ntfs_runlists_merge(ni->runlist.rl, rl2);
+ if (IS_ERR(rl)) {
+ err = PTR_ERR(rl);
+ if (start < 0 || start >= allocated_size)
+ ntfs_error(vol->sb, "Cannot extend allocation of "
+ "inode 0x%lx, attribute type 0x%x, "
+ "because the runlist merge failed "
+ "with error code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ if (err != -ENOMEM)
+ err = -EIO;
+ if (ntfs_cluster_free_from_rl(vol, rl2)) {
+ ntfs_error(vol->sb, "Failed to release allocated "
+ "cluster(s) in error code path. Run "
+ "chkdsk to recover the lost "
+ "cluster(s).");
+ NVolSetErrors(vol);
+ }
+ ntfs_free(rl2);
+ goto err_out;
+ }
+ ni->runlist.rl = rl;
+ ntfs_debug("Allocated 0x%llx clusters.", (long long)(new_alloc_size -
+ allocated_size) >> vol->cluster_size_bits);
+ /* Find the runlist element with which the attribute extent starts. */
+ ll = sle64_to_cpu(a->data.non_resident.lowest_vcn);
+ rl2 = ntfs_rl_find_vcn_nolock(rl, ll);
+ BUG_ON(!rl2);
+ BUG_ON(!rl2->length);
+ BUG_ON(rl2->lcn < LCN_HOLE);
+ mp_rebuilt = FALSE;
+ /* Get the size for the new mapping pairs array for this extent. */
+ mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1);
+ if (unlikely(mp_size <= 0)) {
+ err = mp_size;
+ if (start < 0 || start >= allocated_size)
+ ntfs_error(vol->sb, "Cannot extend allocation of "
+ "inode 0x%lx, attribute type 0x%x, "
+ "because determining the size for the "
+ "mapping pairs failed with error code "
+ "%i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ err = -EIO;
+ goto undo_alloc;
+ }
+ /* Extend the attribute record to fit the bigger mapping pairs array. */
+ attr_len = le32_to_cpu(a->length);
+ err = ntfs_attr_record_resize(m, a, mp_size +
+ le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
+ if (unlikely(err)) {
+ BUG_ON(err != -ENOSPC);
+ // TODO: Deal with this by moving this extent to a new mft
+ // record or by starting a new extent in a new mft record,
+ // possibly by extending this extent partially and filling it
+ // and creating a new extent for the remainder, or by making
+ // other attributes non-resident and/or by moving other
+ // attributes out of this mft record.
+ if (start < 0 || start >= allocated_size)
+ ntfs_error(vol->sb, "Not enough space in the mft "
+ "record for the extended attribute "
+ "record. This case is not "
+ "implemented yet.");
+ err = -EOPNOTSUPP;
+ goto undo_alloc;
+ }
+ mp_rebuilt = TRUE;
+ /* Generate the mapping pairs array directly into the attr record. */
+ err = ntfs_mapping_pairs_build(vol, (u8*)a +
+ le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
+ mp_size, rl2, ll, -1, NULL);
+ if (unlikely(err)) {
+ if (start < 0 || start >= allocated_size)
+ ntfs_error(vol->sb, "Cannot extend allocation of "
+ "inode 0x%lx, attribute type 0x%x, "
+ "because building the mapping pairs "
+ "failed with error code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ err = -EIO;
+ goto undo_alloc;
+ }
+ /* Update the highest_vcn. */
+ a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >>
+ vol->cluster_size_bits) - 1);
+ /*
+ * We now have extended the allocated size of the attribute. Reflect
+ * this in the ntfs_inode structure and the attribute record.
+ */
+ if (a->data.non_resident.lowest_vcn) {
+ /*
+ * We are not in the first attribute extent, switch to it, but
+ * first ensure the changes will make it to disk later.
+ */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ ntfs_attr_reinit_search_ctx(ctx);
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err))
+ goto restore_undo_alloc;
+ /* @m is not used any more so no need to set it. */
+ a = ctx->attr;
+ }
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->allocated_size = new_alloc_size;
+ a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size);
+ /*
+ * FIXME: This would fail if @ni is a directory, $MFT, or an index,
+ * since those can have sparse/compressed set. For example can be
+ * set compressed even though it is not compressed itself and in that
+ * case the bit means that files are to be created compressed in the
+ * directory... At present this is ok as this code is only called for
+ * regular files, and only for their $DATA attribute(s).
+ * FIXME: The calculation is wrong if we created a hole above. For now
+ * it does not matter as we never create holes.
+ */
+ if (NInoSparse(ni) || NInoCompressed(ni)) {
+ ni->itype.compressed.size += new_alloc_size - allocated_size;
+ a->data.non_resident.compressed_size =
+ cpu_to_sle64(ni->itype.compressed.size);
+ vi->i_blocks = ni->itype.compressed.size >> 9;
+ } else
+ vi->i_blocks = new_alloc_size >> 9;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+alloc_done:
+ if (new_data_size >= 0) {
+ BUG_ON(new_data_size <
+ sle64_to_cpu(a->data.non_resident.data_size));
+ a->data.non_resident.data_size = cpu_to_sle64(new_data_size);
+ }
+flush_done:
+ /* Ensure the changes make it to disk. */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+done:
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+ ntfs_debug("Done, new_allocated_size 0x%llx.",
+ (unsigned long long)new_alloc_size);
+ return new_alloc_size;
+restore_undo_alloc:
+ if (start < 0 || start >= allocated_size)
+ ntfs_error(vol->sb, "Cannot complete extension of allocation "
+ "of inode 0x%lx, attribute type 0x%x, because "
+ "lookup of first attribute extent failed with "
+ "error code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ if (err == -ENOENT)
+ err = -EIO;
+ ntfs_attr_reinit_search_ctx(ctx);
+ if (ntfs_attr_lookup(ni->type, ni->name, ni->name_len, CASE_SENSITIVE,
+ allocated_size >> vol->cluster_size_bits, NULL, 0,
+ ctx)) {
+ ntfs_error(vol->sb, "Failed to find last attribute extent of "
+ "attribute in error code path. Run chkdsk to "
+ "recover.");
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->allocated_size = new_alloc_size;
+ /*
+ * FIXME: This would fail if @ni is a directory... See above.
+ * FIXME: The calculation is wrong if we created a hole above.
+ * For now it does not matter as we never create holes.
+ */
+ if (NInoSparse(ni) || NInoCompressed(ni)) {
+ ni->itype.compressed.size += new_alloc_size -
+ allocated_size;
+ vi->i_blocks = ni->itype.compressed.size >> 9;
+ } else
+ vi->i_blocks = new_alloc_size >> 9;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+ /*
+ * The only thing that is now wrong is the allocated size of the
+ * base attribute extent which chkdsk should be able to fix.
+ */
+ NVolSetErrors(vol);
+ return err;
+ }
+ ctx->attr->data.non_resident.highest_vcn = cpu_to_sle64(
+ (allocated_size >> vol->cluster_size_bits) - 1);
+undo_alloc:
+ ll = allocated_size >> vol->cluster_size_bits;
+ if (ntfs_cluster_free(ni, ll, -1, ctx) < 0) {
+ ntfs_error(vol->sb, "Failed to release allocated cluster(s) "
+ "in error code path. Run chkdsk to recover "
+ "the lost cluster(s).");
+ NVolSetErrors(vol);
+ }
+ m = ctx->mrec;
+ a = ctx->attr;
+ /*
+ * If the runlist truncation fails and/or the search context is no
+ * longer valid, we cannot resize the attribute record or build the
+ * mapping pairs array thus we mark the inode bad so that no access to
+ * the freed clusters can happen.
+ */
+ if (ntfs_rl_truncate_nolock(vol, &ni->runlist, ll) || IS_ERR(m)) {
+ ntfs_error(vol->sb, "Failed to %s in error code path. Run "
+ "chkdsk to recover.", IS_ERR(m) ?
+ "restore attribute search context" :
+ "truncate attribute runlist");
+ make_bad_inode(vi);
+ make_bad_inode(VFS_I(base_ni));
+ NVolSetErrors(vol);
+ } else if (mp_rebuilt) {
+ if (ntfs_attr_record_resize(m, a, attr_len)) {
+ ntfs_error(vol->sb, "Failed to restore attribute "
+ "record in error code path. Run "
+ "chkdsk to recover.");
+ make_bad_inode(vi);
+ make_bad_inode(VFS_I(base_ni));
+ NVolSetErrors(vol);
+ } else /* if (success) */ {
+ if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(
+ a->data.non_resident.
+ mapping_pairs_offset), attr_len -
+ le16_to_cpu(a->data.non_resident.
+ mapping_pairs_offset), rl2, ll, -1,
+ NULL)) {
+ ntfs_error(vol->sb, "Failed to restore "
+ "mapping pairs array in error "
+ "code path. Run chkdsk to "
+ "recover.");
+ make_bad_inode(vi);
+ make_bad_inode(VFS_I(base_ni));
+ NVolSetErrors(vol);
+ }
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ }
+ }
+err_out:
+ if (ctx)
+ ntfs_attr_put_search_ctx(ctx);
+ if (m)
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+conv_err_out:
+ ntfs_debug("Failed. Returning error code %i.", err);
+ return err;
+}
+
/**
* ntfs_attr_set - fill (a part of) an attribute with a byte
* @ni: ntfs inode describing the attribute to fill
/* Finally unlock and release the page. */
unlock_page(page);
page_cache_release(page);
+ balance_dirty_pages_ratelimited(mapping);
+ cond_resched();
}
/* If there is a last partial page, need to do it the slow way. */
if (end_ofs) {
ATTR_RECORD *base_attr;
} ntfs_attr_search_ctx;
-extern int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn);
+extern int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn,
+ ntfs_attr_search_ctx *ctx);
extern int ntfs_map_runlist(ntfs_inode *ni, VCN vcn);
extern LCN ntfs_attr_vcn_to_lcn_nolock(ntfs_inode *ni, const VCN vcn,
const BOOL write_locked);
extern runlist_element *ntfs_attr_find_vcn_nolock(ntfs_inode *ni,
- const VCN vcn, const BOOL write_locked);
+ const VCN vcn, ntfs_attr_search_ctx *ctx);
int ntfs_attr_lookup(const ATTR_TYPE type, const ntfschar *name,
const u32 name_len, const IGNORE_CASE_BOOL ic,
extern int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a,
const u32 new_size);
-extern int ntfs_attr_make_non_resident(ntfs_inode *ni);
+extern int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size);
+
+extern s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size,
+ const s64 new_data_size, const s64 data_start);
extern int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt,
const u8 val);
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/pagemap.h>
#include <linux/buffer_head.h>
+#include <linux/pagemap.h>
+#include <linux/pagevec.h>
+#include <linux/sched.h>
+#include <linux/swap.h>
+#include <linux/uio.h>
+#include <linux/writeback.h>
+#include <asm/page.h>
+#include <asm/uaccess.h>
+
+#include "attrib.h"
+#include "bitmap.h"
#include "inode.h"
#include "debug.h"
+#include "lcnalloc.h"
+#include "malloc.h"
+#include "mft.h"
#include "ntfs.h"
/**
#ifdef NTFS_RW
+/**
+ * ntfs_attr_extend_initialized - extend the initialized size of an attribute
+ * @ni: ntfs inode of the attribute to extend
+ * @new_init_size: requested new initialized size in bytes
+ * @cached_page: store any allocated but unused page here
+ * @lru_pvec: lru-buffering pagevec of the caller
+ *
+ * Extend the initialized size of an attribute described by the ntfs inode @ni
+ * to @new_init_size bytes. This involves zeroing any non-sparse space between
+ * the old initialized size and @new_init_size both in the page cache and on
+ * disk (if relevant complete pages are already uptodate in the page cache then
+ * these are simply marked dirty).
+ *
+ * As a side-effect, the file size (vfs inode->i_size) may be incremented as,
+ * in the resident attribute case, it is tied to the initialized size and, in
+ * the non-resident attribute case, it may not fall below the initialized size.
+ *
+ * Note that if the attribute is resident, we do not need to touch the page
+ * cache at all. This is because if the page cache page is not uptodate we
+ * bring it uptodate later, when doing the write to the mft record since we
+ * then already have the page mapped. And if the page is uptodate, the
+ * non-initialized region will already have been zeroed when the page was
+ * brought uptodate and the region may in fact already have been overwritten
+ * with new data via mmap() based writes, so we cannot just zero it. And since
+ * POSIX specifies that the behaviour of resizing a file whilst it is mmap()ped
+ * is unspecified, we choose not to do zeroing and thus we do not need to touch
+ * the page at all. For a more detailed explanation see ntfs_truncate() in
+ * fs/ntfs/inode.c.
+ *
+ * @cached_page and @lru_pvec are just optimizations for dealing with multiple
+ * pages.
+ *
+ * Return 0 on success and -errno on error. In the case that an error is
+ * encountered it is possible that the initialized size will already have been
+ * incremented some way towards @new_init_size but it is guaranteed that if
+ * this is the case, the necessary zeroing will also have happened and that all
+ * metadata is self-consistent.
+ *
+ * Locking: i_sem on the vfs inode corrseponsind to the ntfs inode @ni must be
+ * held by the caller.
+ */
+static int ntfs_attr_extend_initialized(ntfs_inode *ni, const s64 new_init_size,
+ struct page **cached_page, struct pagevec *lru_pvec)
+{
+ s64 old_init_size;
+ loff_t old_i_size;
+ pgoff_t index, end_index;
+ unsigned long flags;
+ struct inode *vi = VFS_I(ni);
+ ntfs_inode *base_ni;
+ MFT_RECORD *m = NULL;
+ ATTR_RECORD *a;
+ ntfs_attr_search_ctx *ctx = NULL;
+ struct address_space *mapping;
+ struct page *page = NULL;
+ u8 *kattr;
+ int err;
+ u32 attr_len;
+
+ read_lock_irqsave(&ni->size_lock, flags);
+ old_init_size = ni->initialized_size;
+ old_i_size = i_size_read(vi);
+ BUG_ON(new_init_size > ni->allocated_size);
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, "
+ "old_initialized_size 0x%llx, "
+ "new_initialized_size 0x%llx, i_size 0x%llx.",
+ vi->i_ino, (unsigned)le32_to_cpu(ni->type),
+ (unsigned long long)old_init_size,
+ (unsigned long long)new_init_size, old_i_size);
+ if (!NInoAttr(ni))
+ base_ni = ni;
+ else
+ base_ni = ni->ext.base_ntfs_ino;
+ /* Use goto to reduce indentation and we need the label below anyway. */
+ if (NInoNonResident(ni))
+ goto do_non_resident_extend;
+ BUG_ON(old_init_size != old_i_size);
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ m = NULL;
+ goto err_out;
+ }
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ err = -EIO;
+ goto err_out;
+ }
+ m = ctx->mrec;
+ a = ctx->attr;
+ BUG_ON(a->non_resident);
+ /* The total length of the attribute value. */
+ attr_len = le32_to_cpu(a->data.resident.value_length);
+ BUG_ON(old_i_size != (loff_t)attr_len);
+ /*
+ * Do the zeroing in the mft record and update the attribute size in
+ * the mft record.
+ */
+ kattr = (u8*)a + le16_to_cpu(a->data.resident.value_offset);
+ memset(kattr + attr_len, 0, new_init_size - attr_len);
+ a->data.resident.value_length = cpu_to_le32((u32)new_init_size);
+ /* Finally, update the sizes in the vfs and ntfs inodes. */
+ write_lock_irqsave(&ni->size_lock, flags);
+ i_size_write(vi, new_init_size);
+ ni->initialized_size = new_init_size;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ goto done;
+do_non_resident_extend:
+ /*
+ * If the new initialized size @new_init_size exceeds the current file
+ * size (vfs inode->i_size), we need to extend the file size to the
+ * new initialized size.
+ */
+ if (new_init_size > old_i_size) {
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ m = NULL;
+ goto err_out;
+ }
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ err = -EIO;
+ goto err_out;
+ }
+ m = ctx->mrec;
+ a = ctx->attr;
+ BUG_ON(!a->non_resident);
+ BUG_ON(old_i_size != (loff_t)
+ sle64_to_cpu(a->data.non_resident.data_size));
+ a->data.non_resident.data_size = cpu_to_sle64(new_init_size);
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ /* Update the file size in the vfs inode. */
+ i_size_write(vi, new_init_size);
+ ntfs_attr_put_search_ctx(ctx);
+ ctx = NULL;
+ unmap_mft_record(base_ni);
+ m = NULL;
+ }
+ mapping = vi->i_mapping;
+ index = old_init_size >> PAGE_CACHE_SHIFT;
+ end_index = (new_init_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ do {
+ /*
+ * Read the page. If the page is not present, this will zero
+ * the uninitialized regions for us.
+ */
+ page = read_cache_page(mapping, index,
+ (filler_t*)mapping->a_ops->readpage, NULL);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto init_err_out;
+ }
+ wait_on_page_locked(page);
+ if (unlikely(!PageUptodate(page) || PageError(page))) {
+ page_cache_release(page);
+ err = -EIO;
+ goto init_err_out;
+ }
+ /*
+ * Update the initialized size in the ntfs inode. This is
+ * enough to make ntfs_writepage() work.
+ */
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->initialized_size = (index + 1) << PAGE_CACHE_SHIFT;
+ if (ni->initialized_size > new_init_size)
+ ni->initialized_size = new_init_size;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ /* Set the page dirty so it gets written out. */
+ set_page_dirty(page);
+ page_cache_release(page);
+ /*
+ * Play nice with the vm and the rest of the system. This is
+ * very much needed as we can potentially be modifying the
+ * initialised size from a very small value to a really huge
+ * value, e.g.
+ * f = open(somefile, O_TRUNC);
+ * truncate(f, 10GiB);
+ * seek(f, 10GiB);
+ * write(f, 1);
+ * And this would mean we would be marking dirty hundreds of
+ * thousands of pages or as in the above example more than
+ * two and a half million pages!
+ *
+ * TODO: For sparse pages could optimize this workload by using
+ * the FsMisc / MiscFs page bit as a "PageIsSparse" bit. This
+ * would be set in readpage for sparse pages and here we would
+ * not need to mark dirty any pages which have this bit set.
+ * The only caveat is that we have to clear the bit everywhere
+ * where we allocate any clusters that lie in the page or that
+ * contain the page.
+ *
+ * TODO: An even greater optimization would be for us to only
+ * call readpage() on pages which are not in sparse regions as
+ * determined from the runlist. This would greatly reduce the
+ * number of pages we read and make dirty in the case of sparse
+ * files.
+ */
+ balance_dirty_pages_ratelimited(mapping);
+ cond_resched();
+ } while (++index < end_index);
+ read_lock_irqsave(&ni->size_lock, flags);
+ BUG_ON(ni->initialized_size != new_init_size);
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ /* Now bring in sync the initialized_size in the mft record. */
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ m = NULL;
+ goto init_err_out;
+ }
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ goto init_err_out;
+ }
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ err = -EIO;
+ goto init_err_out;
+ }
+ m = ctx->mrec;
+ a = ctx->attr;
+ BUG_ON(!a->non_resident);
+ a->data.non_resident.initialized_size = cpu_to_sle64(new_init_size);
+done:
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ if (ctx)
+ ntfs_attr_put_search_ctx(ctx);
+ if (m)
+ unmap_mft_record(base_ni);
+ ntfs_debug("Done, initialized_size 0x%llx, i_size 0x%llx.",
+ (unsigned long long)new_init_size, i_size_read(vi));
+ return 0;
+init_err_out:
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->initialized_size = old_init_size;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+err_out:
+ if (ctx)
+ ntfs_attr_put_search_ctx(ctx);
+ if (m)
+ unmap_mft_record(base_ni);
+ ntfs_debug("Failed. Returning error code %i.", err);
+ return err;
+}
+
+/**
+ * ntfs_fault_in_pages_readable -
+ *
+ * Fault a number of userspace pages into pagetables.
+ *
+ * Unlike include/linux/pagemap.h::fault_in_pages_readable(), this one copes
+ * with more than two userspace pages as well as handling the single page case
+ * elegantly.
+ *
+ * If you find this difficult to understand, then think of the while loop being
+ * the following code, except that we do without the integer variable ret:
+ *
+ * do {
+ * ret = __get_user(c, uaddr);
+ * uaddr += PAGE_SIZE;
+ * } while (!ret && uaddr < end);
+ *
+ * Note, the final __get_user() may well run out-of-bounds of the user buffer,
+ * but _not_ out-of-bounds of the page the user buffer belongs to, and since
+ * this is only a read and not a write, and since it is still in the same page,
+ * it should not matter and this makes the code much simpler.
+ */
+static inline void ntfs_fault_in_pages_readable(const char __user *uaddr,
+ int bytes)
+{
+ const char __user *end;
+ volatile char c;
+
+ /* Set @end to the first byte outside the last page we care about. */
+ end = (const char __user*)PAGE_ALIGN((ptrdiff_t __user)uaddr + bytes);
+
+ while (!__get_user(c, uaddr) && (uaddr += PAGE_SIZE, uaddr < end))
+ ;
+}
+
+/**
+ * ntfs_fault_in_pages_readable_iovec -
+ *
+ * Same as ntfs_fault_in_pages_readable() but operates on an array of iovecs.
+ */
+static inline void ntfs_fault_in_pages_readable_iovec(const struct iovec *iov,
+ size_t iov_ofs, int bytes)
+{
+ do {
+ const char __user *buf;
+ unsigned len;
+
+ buf = iov->iov_base + iov_ofs;
+ len = iov->iov_len - iov_ofs;
+ if (len > bytes)
+ len = bytes;
+ ntfs_fault_in_pages_readable(buf, len);
+ bytes -= len;
+ iov++;
+ iov_ofs = 0;
+ } while (bytes);
+}
+
+/**
+ * __ntfs_grab_cache_pages - obtain a number of locked pages
+ * @mapping: address space mapping from which to obtain page cache pages
+ * @index: starting index in @mapping at which to begin obtaining pages
+ * @nr_pages: number of page cache pages to obtain
+ * @pages: array of pages in which to return the obtained page cache pages
+ * @cached_page: allocated but as yet unused page
+ * @lru_pvec: lru-buffering pagevec of caller
+ *
+ * Obtain @nr_pages locked page cache pages from the mapping @maping and
+ * starting at index @index.
+ *
+ * If a page is newly created, increment its refcount and add it to the
+ * caller's lru-buffering pagevec @lru_pvec.
+ *
+ * This is the same as mm/filemap.c::__grab_cache_page(), except that @nr_pages
+ * are obtained at once instead of just one page and that 0 is returned on
+ * success and -errno on error.
+ *
+ * Note, the page locks are obtained in ascending page index order.
+ */
+static inline int __ntfs_grab_cache_pages(struct address_space *mapping,
+ pgoff_t index, const unsigned nr_pages, struct page **pages,
+ struct page **cached_page, struct pagevec *lru_pvec)
+{
+ int err, nr;
+
+ BUG_ON(!nr_pages);
+ err = nr = 0;
+ do {
+ pages[nr] = find_lock_page(mapping, index);
+ if (!pages[nr]) {
+ if (!*cached_page) {
+ *cached_page = page_cache_alloc(mapping);
+ if (unlikely(!*cached_page)) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+ }
+ err = add_to_page_cache(*cached_page, mapping, index,
+ GFP_KERNEL);
+ if (unlikely(err)) {
+ if (err == -EEXIST)
+ continue;
+ goto err_out;
+ }
+ pages[nr] = *cached_page;
+ page_cache_get(*cached_page);
+ if (unlikely(!pagevec_add(lru_pvec, *cached_page)))
+ __pagevec_lru_add(lru_pvec);
+ *cached_page = NULL;
+ }
+ index++;
+ nr++;
+ } while (nr < nr_pages);
+out:
+ return err;
+err_out:
+ while (nr > 0) {
+ unlock_page(pages[--nr]);
+ page_cache_release(pages[nr]);
+ }
+ goto out;
+}
+
+static inline int ntfs_submit_bh_for_read(struct buffer_head *bh)
+{
+ lock_buffer(bh);
+ get_bh(bh);
+ bh->b_end_io = end_buffer_read_sync;
+ return submit_bh(READ, bh);
+}
+
+/**
+ * ntfs_prepare_pages_for_non_resident_write - prepare pages for receiving data
+ * @pages: array of destination pages
+ * @nr_pages: number of pages in @pages
+ * @pos: byte position in file at which the write begins
+ * @bytes: number of bytes to be written
+ *
+ * This is called for non-resident attributes from ntfs_file_buffered_write()
+ * with i_sem held on the inode (@pages[0]->mapping->host). There are
+ * @nr_pages pages in @pages which are locked but not kmap()ped. The source
+ * data has not yet been copied into the @pages.
+ *
+ * Need to fill any holes with actual clusters, allocate buffers if necessary,
+ * ensure all the buffers are mapped, and bring uptodate any buffers that are
+ * only partially being written to.
+ *
+ * If @nr_pages is greater than one, we are guaranteed that the cluster size is
+ * greater than PAGE_CACHE_SIZE, that all pages in @pages are entirely inside
+ * the same cluster and that they are the entirety of that cluster, and that
+ * the cluster is sparse, i.e. we need to allocate a cluster to fill the hole.
+ *
+ * i_size is not to be modified yet.
+ *
+ * Return 0 on success or -errno on error.
+ */
+static int ntfs_prepare_pages_for_non_resident_write(struct page **pages,
+ unsigned nr_pages, s64 pos, size_t bytes)
+{
+ VCN vcn, highest_vcn = 0, cpos, cend, bh_cpos, bh_cend;
+ LCN lcn;
+ s64 bh_pos, vcn_len, end, initialized_size;
+ sector_t lcn_block;
+ struct page *page;
+ struct inode *vi;
+ ntfs_inode *ni, *base_ni = NULL;
+ ntfs_volume *vol;
+ runlist_element *rl, *rl2;
+ struct buffer_head *bh, *head, *wait[2], **wait_bh = wait;
+ ntfs_attr_search_ctx *ctx = NULL;
+ MFT_RECORD *m = NULL;
+ ATTR_RECORD *a = NULL;
+ unsigned long flags;
+ u32 attr_rec_len = 0;
+ unsigned blocksize, u;
+ int err, mp_size;
+ BOOL rl_write_locked, was_hole, is_retry;
+ unsigned char blocksize_bits;
+ struct {
+ u8 runlist_merged:1;
+ u8 mft_attr_mapped:1;
+ u8 mp_rebuilt:1;
+ u8 attr_switched:1;
+ } status = { 0, 0, 0, 0 };
+
+ BUG_ON(!nr_pages);
+ BUG_ON(!pages);
+ BUG_ON(!*pages);
+ vi = pages[0]->mapping->host;
+ ni = NTFS_I(vi);
+ vol = ni->vol;
+ ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, start page "
+ "index 0x%lx, nr_pages 0x%x, pos 0x%llx, bytes 0x%zx.",
+ vi->i_ino, ni->type, pages[0]->index, nr_pages,
+ (long long)pos, bytes);
+ blocksize_bits = vi->i_blkbits;
+ blocksize = 1 << blocksize_bits;
+ u = 0;
+ do {
+ struct page *page = pages[u];
+ /*
+ * create_empty_buffers() will create uptodate/dirty buffers if
+ * the page is uptodate/dirty.
+ */
+ if (!page_has_buffers(page)) {
+ create_empty_buffers(page, blocksize, 0);
+ if (unlikely(!page_has_buffers(page)))
+ return -ENOMEM;
+ }
+ } while (++u < nr_pages);
+ rl_write_locked = FALSE;
+ rl = NULL;
+ err = 0;
+ vcn = lcn = -1;
+ vcn_len = 0;
+ lcn_block = -1;
+ was_hole = FALSE;
+ cpos = pos >> vol->cluster_size_bits;
+ end = pos + bytes;
+ cend = (end + vol->cluster_size - 1) >> vol->cluster_size_bits;
+ /*
+ * Loop over each page and for each page over each buffer. Use goto to
+ * reduce indentation.
+ */
+ u = 0;
+do_next_page:
+ page = pages[u];
+ bh_pos = (s64)page->index << PAGE_CACHE_SHIFT;
+ bh = head = page_buffers(page);
+ do {
+ VCN cdelta;
+ s64 bh_end;
+ unsigned bh_cofs;
+
+ /* Clear buffer_new on all buffers to reinitialise state. */
+ if (buffer_new(bh))
+ clear_buffer_new(bh);
+ bh_end = bh_pos + blocksize;
+ bh_cpos = bh_pos >> vol->cluster_size_bits;
+ bh_cofs = bh_pos & vol->cluster_size_mask;
+ if (buffer_mapped(bh)) {
+ /*
+ * The buffer is already mapped. If it is uptodate,
+ * ignore it.
+ */
+ if (buffer_uptodate(bh))
+ continue;
+ /*
+ * The buffer is not uptodate. If the page is uptodate
+ * set the buffer uptodate and otherwise ignore it.
+ */
+ if (PageUptodate(page)) {
+ set_buffer_uptodate(bh);
+ continue;
+ }
+ /*
+ * Neither the page nor the buffer are uptodate. If
+ * the buffer is only partially being written to, we
+ * need to read it in before the write, i.e. now.
+ */
+ if ((bh_pos < pos && bh_end > pos) ||
+ (bh_pos < end && bh_end > end)) {
+ /*
+ * If the buffer is fully or partially within
+ * the initialized size, do an actual read.
+ * Otherwise, simply zero the buffer.
+ */
+ read_lock_irqsave(&ni->size_lock, flags);
+ initialized_size = ni->initialized_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (bh_pos < initialized_size) {
+ ntfs_submit_bh_for_read(bh);
+ *wait_bh++ = bh;
+ } else {
+ u8 *kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + bh_offset(bh), 0,
+ blocksize);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+ set_buffer_uptodate(bh);
+ }
+ }
+ continue;
+ }
+ /* Unmapped buffer. Need to map it. */
+ bh->b_bdev = vol->sb->s_bdev;
+ /*
+ * If the current buffer is in the same clusters as the map
+ * cache, there is no need to check the runlist again. The
+ * map cache is made up of @vcn, which is the first cached file
+ * cluster, @vcn_len which is the number of cached file
+ * clusters, @lcn is the device cluster corresponding to @vcn,
+ * and @lcn_block is the block number corresponding to @lcn.
+ */
+ cdelta = bh_cpos - vcn;
+ if (likely(!cdelta || (cdelta > 0 && cdelta < vcn_len))) {
+map_buffer_cached:
+ BUG_ON(lcn < 0);
+ bh->b_blocknr = lcn_block +
+ (cdelta << (vol->cluster_size_bits -
+ blocksize_bits)) +
+ (bh_cofs >> blocksize_bits);
+ set_buffer_mapped(bh);
+ /*
+ * If the page is uptodate so is the buffer. If the
+ * buffer is fully outside the write, we ignore it if
+ * it was already allocated and we mark it dirty so it
+ * gets written out if we allocated it. On the other
+ * hand, if we allocated the buffer but we are not
+ * marking it dirty we set buffer_new so we can do
+ * error recovery.
+ */
+ if (PageUptodate(page)) {
+ if (!buffer_uptodate(bh))
+ set_buffer_uptodate(bh);
+ if (unlikely(was_hole)) {
+ /* We allocated the buffer. */
+ unmap_underlying_metadata(bh->b_bdev,
+ bh->b_blocknr);
+ if (bh_end <= pos || bh_pos >= end)
+ mark_buffer_dirty(bh);
+ else
+ set_buffer_new(bh);
+ }
+ continue;
+ }
+ /* Page is _not_ uptodate. */
+ if (likely(!was_hole)) {
+ /*
+ * Buffer was already allocated. If it is not
+ * uptodate and is only partially being written
+ * to, we need to read it in before the write,
+ * i.e. now.
+ */
+ if (!buffer_uptodate(bh) && bh_pos < end &&
+ bh_end > pos &&
+ (bh_pos < pos ||
+ bh_end > end)) {
+ /*
+ * If the buffer is fully or partially
+ * within the initialized size, do an
+ * actual read. Otherwise, simply zero
+ * the buffer.
+ */
+ read_lock_irqsave(&ni->size_lock,
+ flags);
+ initialized_size = ni->initialized_size;
+ read_unlock_irqrestore(&ni->size_lock,
+ flags);
+ if (bh_pos < initialized_size) {
+ ntfs_submit_bh_for_read(bh);
+ *wait_bh++ = bh;
+ } else {
+ u8 *kaddr = kmap_atomic(page,
+ KM_USER0);
+ memset(kaddr + bh_offset(bh),
+ 0, blocksize);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+ set_buffer_uptodate(bh);
+ }
+ }
+ continue;
+ }
+ /* We allocated the buffer. */
+ unmap_underlying_metadata(bh->b_bdev, bh->b_blocknr);
+ /*
+ * If the buffer is fully outside the write, zero it,
+ * set it uptodate, and mark it dirty so it gets
+ * written out. If it is partially being written to,
+ * zero region surrounding the write but leave it to
+ * commit write to do anything else. Finally, if the
+ * buffer is fully being overwritten, do nothing.
+ */
+ if (bh_end <= pos || bh_pos >= end) {
+ if (!buffer_uptodate(bh)) {
+ u8 *kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + bh_offset(bh), 0,
+ blocksize);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+ set_buffer_uptodate(bh);
+ }
+ mark_buffer_dirty(bh);
+ continue;
+ }
+ set_buffer_new(bh);
+ if (!buffer_uptodate(bh) &&
+ (bh_pos < pos || bh_end > end)) {
+ u8 *kaddr;
+ unsigned pofs;
+
+ kaddr = kmap_atomic(page, KM_USER0);
+ if (bh_pos < pos) {
+ pofs = bh_pos & ~PAGE_CACHE_MASK;
+ memset(kaddr + pofs, 0, pos - bh_pos);
+ }
+ if (bh_end > end) {
+ pofs = end & ~PAGE_CACHE_MASK;
+ memset(kaddr + pofs, 0, bh_end - end);
+ }
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+ }
+ continue;
+ }
+ /*
+ * Slow path: this is the first buffer in the cluster. If it
+ * is outside allocated size and is not uptodate, zero it and
+ * set it uptodate.
+ */
+ read_lock_irqsave(&ni->size_lock, flags);
+ initialized_size = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (bh_pos > initialized_size) {
+ if (PageUptodate(page)) {
+ if (!buffer_uptodate(bh))
+ set_buffer_uptodate(bh);
+ } else if (!buffer_uptodate(bh)) {
+ u8 *kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + bh_offset(bh), 0, blocksize);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+ set_buffer_uptodate(bh);
+ }
+ continue;
+ }
+ is_retry = FALSE;
+ if (!rl) {
+ down_read(&ni->runlist.lock);
+retry_remap:
+ rl = ni->runlist.rl;
+ }
+ if (likely(rl != NULL)) {
+ /* Seek to element containing target cluster. */
+ while (rl->length && rl[1].vcn <= bh_cpos)
+ rl++;
+ lcn = ntfs_rl_vcn_to_lcn(rl, bh_cpos);
+ if (likely(lcn >= 0)) {
+ /*
+ * Successful remap, setup the map cache and
+ * use that to deal with the buffer.
+ */
+ was_hole = FALSE;
+ vcn = bh_cpos;
+ vcn_len = rl[1].vcn - vcn;
+ lcn_block = lcn << (vol->cluster_size_bits -
+ blocksize_bits);
+ cdelta = 0;
+ /*
+ * If the number of remaining clusters touched
+ * by the write is smaller or equal to the
+ * number of cached clusters, unlock the
+ * runlist as the map cache will be used from
+ * now on.
+ */
+ if (likely(vcn + vcn_len >= cend)) {
+ if (rl_write_locked) {
+ up_write(&ni->runlist.lock);
+ rl_write_locked = FALSE;
+ } else
+ up_read(&ni->runlist.lock);
+ rl = NULL;
+ }
+ goto map_buffer_cached;
+ }
+ } else
+ lcn = LCN_RL_NOT_MAPPED;
+ /*
+ * If it is not a hole and not out of bounds, the runlist is
+ * probably unmapped so try to map it now.
+ */
+ if (unlikely(lcn != LCN_HOLE && lcn != LCN_ENOENT)) {
+ if (likely(!is_retry && lcn == LCN_RL_NOT_MAPPED)) {
+ /* Attempt to map runlist. */
+ if (!rl_write_locked) {
+ /*
+ * We need the runlist locked for
+ * writing, so if it is locked for
+ * reading relock it now and retry in
+ * case it changed whilst we dropped
+ * the lock.
+ */
+ up_read(&ni->runlist.lock);
+ down_write(&ni->runlist.lock);
+ rl_write_locked = TRUE;
+ goto retry_remap;
+ }
+ err = ntfs_map_runlist_nolock(ni, bh_cpos,
+ NULL);
+ if (likely(!err)) {
+ is_retry = TRUE;
+ goto retry_remap;
+ }
+ /*
+ * If @vcn is out of bounds, pretend @lcn is
+ * LCN_ENOENT. As long as the buffer is out
+ * of bounds this will work fine.
+ */
+ if (err == -ENOENT) {
+ lcn = LCN_ENOENT;
+ err = 0;
+ goto rl_not_mapped_enoent;
+ }
+ } else
+ err = -EIO;
+ /* Failed to map the buffer, even after retrying. */
+ bh->b_blocknr = -1;
+ ntfs_error(vol->sb, "Failed to write to inode 0x%lx, "
+ "attribute type 0x%x, vcn 0x%llx, "
+ "vcn offset 0x%x, because its "
+ "location on disk could not be "
+ "determined%s (error code %i).",
+ ni->mft_no, ni->type,
+ (unsigned long long)bh_cpos,
+ (unsigned)bh_pos &
+ vol->cluster_size_mask,
+ is_retry ? " even after retrying" : "",
+ err);
+ break;
+ }
+rl_not_mapped_enoent:
+ /*
+ * The buffer is in a hole or out of bounds. We need to fill
+ * the hole, unless the buffer is in a cluster which is not
+ * touched by the write, in which case we just leave the buffer
+ * unmapped. This can only happen when the cluster size is
+ * less than the page cache size.
+ */
+ if (unlikely(vol->cluster_size < PAGE_CACHE_SIZE)) {
+ bh_cend = (bh_end + vol->cluster_size - 1) >>
+ vol->cluster_size_bits;
+ if ((bh_cend <= cpos || bh_cpos >= cend)) {
+ bh->b_blocknr = -1;
+ /*
+ * If the buffer is uptodate we skip it. If it
+ * is not but the page is uptodate, we can set
+ * the buffer uptodate. If the page is not
+ * uptodate, we can clear the buffer and set it
+ * uptodate. Whether this is worthwhile is
+ * debatable and this could be removed.
+ */
+ if (PageUptodate(page)) {
+ if (!buffer_uptodate(bh))
+ set_buffer_uptodate(bh);
+ } else if (!buffer_uptodate(bh)) {
+ u8 *kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + bh_offset(bh), 0,
+ blocksize);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+ set_buffer_uptodate(bh);
+ }
+ continue;
+ }
+ }
+ /*
+ * Out of bounds buffer is invalid if it was not really out of
+ * bounds.
+ */
+ BUG_ON(lcn != LCN_HOLE);
+ /*
+ * We need the runlist locked for writing, so if it is locked
+ * for reading relock it now and retry in case it changed
+ * whilst we dropped the lock.
+ */
+ BUG_ON(!rl);
+ if (!rl_write_locked) {
+ up_read(&ni->runlist.lock);
+ down_write(&ni->runlist.lock);
+ rl_write_locked = TRUE;
+ goto retry_remap;
+ }
+ /* Find the previous last allocated cluster. */
+ BUG_ON(rl->lcn != LCN_HOLE);
+ lcn = -1;
+ rl2 = rl;
+ while (--rl2 >= ni->runlist.rl) {
+ if (rl2->lcn >= 0) {
+ lcn = rl2->lcn + rl2->length;
+ break;
+ }
+ }
+ rl2 = ntfs_cluster_alloc(vol, bh_cpos, 1, lcn, DATA_ZONE,
+ FALSE);
+ if (IS_ERR(rl2)) {
+ err = PTR_ERR(rl2);
+ ntfs_debug("Failed to allocate cluster, error code %i.",
+ err);
+ break;
+ }
+ lcn = rl2->lcn;
+ rl = ntfs_runlists_merge(ni->runlist.rl, rl2);
+ if (IS_ERR(rl)) {
+ err = PTR_ERR(rl);
+ if (err != -ENOMEM)
+ err = -EIO;
+ if (ntfs_cluster_free_from_rl(vol, rl2)) {
+ ntfs_error(vol->sb, "Failed to release "
+ "allocated cluster in error "
+ "code path. Run chkdsk to "
+ "recover the lost cluster.");
+ NVolSetErrors(vol);
+ }
+ ntfs_free(rl2);
+ break;
+ }
+ ni->runlist.rl = rl;
+ status.runlist_merged = 1;
+ ntfs_debug("Allocated cluster, lcn 0x%llx.", lcn);
+ /* Map and lock the mft record and get the attribute record. */
+ if (!NInoAttr(ni))
+ base_ni = ni;
+ else
+ base_ni = ni->ext.base_ntfs_ino;
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ break;
+ }
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ unmap_mft_record(base_ni);
+ break;
+ }
+ status.mft_attr_mapped = 1;
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, bh_cpos, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ err = -EIO;
+ break;
+ }
+ m = ctx->mrec;
+ a = ctx->attr;
+ /*
+ * Find the runlist element with which the attribute extent
+ * starts. Note, we cannot use the _attr_ version because we
+ * have mapped the mft record. That is ok because we know the
+ * runlist fragment must be mapped already to have ever gotten
+ * here, so we can just use the _rl_ version.
+ */
+ vcn = sle64_to_cpu(a->data.non_resident.lowest_vcn);
+ rl2 = ntfs_rl_find_vcn_nolock(rl, vcn);
+ BUG_ON(!rl2);
+ BUG_ON(!rl2->length);
+ BUG_ON(rl2->lcn < LCN_HOLE);
+ highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
+ /*
+ * If @highest_vcn is zero, calculate the real highest_vcn
+ * (which can really be zero).
+ */
+ if (!highest_vcn)
+ highest_vcn = (sle64_to_cpu(
+ a->data.non_resident.allocated_size) >>
+ vol->cluster_size_bits) - 1;
+ /*
+ * Determine the size of the mapping pairs array for the new
+ * extent, i.e. the old extent with the hole filled.
+ */
+ mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, vcn,
+ highest_vcn);
+ if (unlikely(mp_size <= 0)) {
+ if (!(err = mp_size))
+ err = -EIO;
+ ntfs_debug("Failed to get size for mapping pairs "
+ "array, error code %i.", err);
+ break;
+ }
+ /*
+ * Resize the attribute record to fit the new mapping pairs
+ * array.
+ */
+ attr_rec_len = le32_to_cpu(a->length);
+ err = ntfs_attr_record_resize(m, a, mp_size + le16_to_cpu(
+ a->data.non_resident.mapping_pairs_offset));
+ if (unlikely(err)) {
+ BUG_ON(err != -ENOSPC);
+ // TODO: Deal with this by using the current attribute
+ // and fill it with as much of the mapping pairs
+ // array as possible. Then loop over each attribute
+ // extent rewriting the mapping pairs arrays as we go
+ // along and if when we reach the end we have not
+ // enough space, try to resize the last attribute
+ // extent and if even that fails, add a new attribute
+ // extent.
+ // We could also try to resize at each step in the hope
+ // that we will not need to rewrite every single extent.
+ // Note, we may need to decompress some extents to fill
+ // the runlist as we are walking the extents...
+ ntfs_error(vol->sb, "Not enough space in the mft "
+ "record for the extended attribute "
+ "record. This case is not "
+ "implemented yet.");
+ err = -EOPNOTSUPP;
+ break ;
+ }
+ status.mp_rebuilt = 1;
+ /*
+ * Generate the mapping pairs array directly into the attribute
+ * record.
+ */
+ err = ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(
+ a->data.non_resident.mapping_pairs_offset),
+ mp_size, rl2, vcn, highest_vcn, NULL);
+ if (unlikely(err)) {
+ ntfs_error(vol->sb, "Cannot fill hole in inode 0x%lx, "
+ "attribute type 0x%x, because building "
+ "the mapping pairs failed with error "
+ "code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ err = -EIO;
+ break;
+ }
+ /* Update the highest_vcn but only if it was not set. */
+ if (unlikely(!a->data.non_resident.highest_vcn))
+ a->data.non_resident.highest_vcn =
+ cpu_to_sle64(highest_vcn);
+ /*
+ * If the attribute is sparse/compressed, update the compressed
+ * size in the ntfs_inode structure and the attribute record.
+ */
+ if (likely(NInoSparse(ni) || NInoCompressed(ni))) {
+ /*
+ * If we are not in the first attribute extent, switch
+ * to it, but first ensure the changes will make it to
+ * disk later.
+ */
+ if (a->data.non_resident.lowest_vcn) {
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ ntfs_attr_reinit_search_ctx(ctx);
+ err = ntfs_attr_lookup(ni->type, ni->name,
+ ni->name_len, CASE_SENSITIVE,
+ 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ status.attr_switched = 1;
+ break;
+ }
+ /* @m is not used any more so do not set it. */
+ a = ctx->attr;
+ }
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->itype.compressed.size += vol->cluster_size;
+ a->data.non_resident.compressed_size =
+ cpu_to_sle64(ni->itype.compressed.size);
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ }
+ /* Ensure the changes make it to disk. */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ /* Successfully filled the hole. */
+ status.runlist_merged = 0;
+ status.mft_attr_mapped = 0;
+ status.mp_rebuilt = 0;
+ /* Setup the map cache and use that to deal with the buffer. */
+ was_hole = TRUE;
+ vcn = bh_cpos;
+ vcn_len = 1;
+ lcn_block = lcn << (vol->cluster_size_bits - blocksize_bits);
+ cdelta = 0;
+ /*
+ * If the number of remaining clusters in the @pages is smaller
+ * or equal to the number of cached clusters, unlock the
+ * runlist as the map cache will be used from now on.
+ */
+ if (likely(vcn + vcn_len >= cend)) {
+ up_write(&ni->runlist.lock);
+ rl_write_locked = FALSE;
+ rl = NULL;
+ }
+ goto map_buffer_cached;
+ } while (bh_pos += blocksize, (bh = bh->b_this_page) != head);
+ /* If there are no errors, do the next page. */
+ if (likely(!err && ++u < nr_pages))
+ goto do_next_page;
+ /* If there are no errors, release the runlist lock if we took it. */
+ if (likely(!err)) {
+ if (unlikely(rl_write_locked)) {
+ up_write(&ni->runlist.lock);
+ rl_write_locked = FALSE;
+ } else if (unlikely(rl))
+ up_read(&ni->runlist.lock);
+ rl = NULL;
+ }
+ /* If we issued read requests, let them complete. */
+ read_lock_irqsave(&ni->size_lock, flags);
+ initialized_size = ni->initialized_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ while (wait_bh > wait) {
+ bh = *--wait_bh;
+ wait_on_buffer(bh);
+ if (likely(buffer_uptodate(bh))) {
+ page = bh->b_page;
+ bh_pos = ((s64)page->index << PAGE_CACHE_SHIFT) +
+ bh_offset(bh);
+ /*
+ * If the buffer overflows the initialized size, need
+ * to zero the overflowing region.
+ */
+ if (unlikely(bh_pos + blocksize > initialized_size)) {
+ u8 *kaddr;
+ int ofs = 0;
+
+ if (likely(bh_pos < initialized_size))
+ ofs = initialized_size - bh_pos;
+ kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + bh_offset(bh) + ofs, 0,
+ blocksize - ofs);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+ }
+ } else /* if (unlikely(!buffer_uptodate(bh))) */
+ err = -EIO;
+ }
+ if (likely(!err)) {
+ /* Clear buffer_new on all buffers. */
+ u = 0;
+ do {
+ bh = head = page_buffers(pages[u]);
+ do {
+ if (buffer_new(bh))
+ clear_buffer_new(bh);
+ } while ((bh = bh->b_this_page) != head);
+ } while (++u < nr_pages);
+ ntfs_debug("Done.");
+ return err;
+ }
+ if (status.attr_switched) {
+ /* Get back to the attribute extent we modified. */
+ ntfs_attr_reinit_search_ctx(ctx);
+ if (ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, bh_cpos, NULL, 0, ctx)) {
+ ntfs_error(vol->sb, "Failed to find required "
+ "attribute extent of attribute in "
+ "error code path. Run chkdsk to "
+ "recover.");
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->itype.compressed.size += vol->cluster_size;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ /*
+ * The only thing that is now wrong is the compressed
+ * size of the base attribute extent which chkdsk
+ * should be able to fix.
+ */
+ NVolSetErrors(vol);
+ } else {
+ m = ctx->mrec;
+ a = ctx->attr;
+ status.attr_switched = 0;
+ }
+ }
+ /*
+ * If the runlist has been modified, need to restore it by punching a
+ * hole into it and we then need to deallocate the on-disk cluster as
+ * well. Note, we only modify the runlist if we are able to generate a
+ * new mapping pairs array, i.e. only when the mapped attribute extent
+ * is not switched.
+ */
+ if (status.runlist_merged && !status.attr_switched) {
+ BUG_ON(!rl_write_locked);
+ /* Make the file cluster we allocated sparse in the runlist. */
+ if (ntfs_rl_punch_nolock(vol, &ni->runlist, bh_cpos, 1)) {
+ ntfs_error(vol->sb, "Failed to punch hole into "
+ "attribute runlist in error code "
+ "path. Run chkdsk to recover the "
+ "lost cluster.");
+ make_bad_inode(vi);
+ make_bad_inode(VFS_I(base_ni));
+ NVolSetErrors(vol);
+ } else /* if (success) */ {
+ status.runlist_merged = 0;
+ /*
+ * Deallocate the on-disk cluster we allocated but only
+ * if we succeeded in punching its vcn out of the
+ * runlist.
+ */
+ down_write(&vol->lcnbmp_lock);
+ if (ntfs_bitmap_clear_bit(vol->lcnbmp_ino, lcn)) {
+ ntfs_error(vol->sb, "Failed to release "
+ "allocated cluster in error "
+ "code path. Run chkdsk to "
+ "recover the lost cluster.");
+ NVolSetErrors(vol);
+ }
+ up_write(&vol->lcnbmp_lock);
+ }
+ }
+ /*
+ * Resize the attribute record to its old size and rebuild the mapping
+ * pairs array. Note, we only can do this if the runlist has been
+ * restored to its old state which also implies that the mapped
+ * attribute extent is not switched.
+ */
+ if (status.mp_rebuilt && !status.runlist_merged) {
+ if (ntfs_attr_record_resize(m, a, attr_rec_len)) {
+ ntfs_error(vol->sb, "Failed to restore attribute "
+ "record in error code path. Run "
+ "chkdsk to recover.");
+ make_bad_inode(vi);
+ make_bad_inode(VFS_I(base_ni));
+ NVolSetErrors(vol);
+ } else /* if (success) */ {
+ if (ntfs_mapping_pairs_build(vol, (u8*)a +
+ le16_to_cpu(a->data.non_resident.
+ mapping_pairs_offset), attr_rec_len -
+ le16_to_cpu(a->data.non_resident.
+ mapping_pairs_offset), ni->runlist.rl,
+ vcn, highest_vcn, NULL)) {
+ ntfs_error(vol->sb, "Failed to restore "
+ "mapping pairs array in error "
+ "code path. Run chkdsk to "
+ "recover.");
+ make_bad_inode(vi);
+ make_bad_inode(VFS_I(base_ni));
+ NVolSetErrors(vol);
+ }
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ }
+ }
+ /* Release the mft record and the attribute. */
+ if (status.mft_attr_mapped) {
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ }
+ /* Release the runlist lock. */
+ if (rl_write_locked)
+ up_write(&ni->runlist.lock);
+ else if (rl)
+ up_read(&ni->runlist.lock);
+ /*
+ * Zero out any newly allocated blocks to avoid exposing stale data.
+ * If BH_New is set, we know that the block was newly allocated above
+ * and that it has not been fully zeroed and marked dirty yet.
+ */
+ nr_pages = u;
+ u = 0;
+ end = bh_cpos << vol->cluster_size_bits;
+ do {
+ page = pages[u];
+ bh = head = page_buffers(page);
+ do {
+ if (u == nr_pages &&
+ ((s64)page->index << PAGE_CACHE_SHIFT) +
+ bh_offset(bh) >= end)
+ break;
+ if (!buffer_new(bh))
+ continue;
+ clear_buffer_new(bh);
+ if (!buffer_uptodate(bh)) {
+ if (PageUptodate(page))
+ set_buffer_uptodate(bh);
+ else {
+ u8 *kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + bh_offset(bh), 0,
+ blocksize);
+ kunmap_atomic(kaddr, KM_USER0);
+ flush_dcache_page(page);
+ set_buffer_uptodate(bh);
+ }
+ }
+ mark_buffer_dirty(bh);
+ } while ((bh = bh->b_this_page) != head);
+ } while (++u <= nr_pages);
+ ntfs_error(vol->sb, "Failed. Returning error code %i.", err);
+ return err;
+}
+
+/*
+ * Copy as much as we can into the pages and return the number of bytes which
+ * were sucessfully copied. If a fault is encountered then clear the pages
+ * out to (ofs + bytes) and return the number of bytes which were copied.
+ */
+static inline size_t ntfs_copy_from_user(struct page **pages,
+ unsigned nr_pages, unsigned ofs, const char __user *buf,
+ size_t bytes)
+{
+ struct page **last_page = pages + nr_pages;
+ char *kaddr;
+ size_t total = 0;
+ unsigned len;
+ int left;
+
+ do {
+ len = PAGE_CACHE_SIZE - ofs;
+ if (len > bytes)
+ len = bytes;
+ kaddr = kmap_atomic(*pages, KM_USER0);
+ left = __copy_from_user_inatomic(kaddr + ofs, buf, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ if (unlikely(left)) {
+ /* Do it the slow way. */
+ kaddr = kmap(*pages);
+ left = __copy_from_user(kaddr + ofs, buf, len);
+ kunmap(*pages);
+ if (unlikely(left))
+ goto err_out;
+ }
+ total += len;
+ bytes -= len;
+ if (!bytes)
+ break;
+ buf += len;
+ ofs = 0;
+ } while (++pages < last_page);
+out:
+ return total;
+err_out:
+ total += len - left;
+ /* Zero the rest of the target like __copy_from_user(). */
+ while (++pages < last_page) {
+ bytes -= len;
+ if (!bytes)
+ break;
+ len = PAGE_CACHE_SIZE;
+ if (len > bytes)
+ len = bytes;
+ kaddr = kmap_atomic(*pages, KM_USER0);
+ memset(kaddr, 0, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ }
+ goto out;
+}
+
+static size_t __ntfs_copy_from_user_iovec(char *vaddr,
+ const struct iovec *iov, size_t iov_ofs, size_t bytes)
+{
+ size_t total = 0;
+
+ while (1) {
+ const char __user *buf = iov->iov_base + iov_ofs;
+ unsigned len;
+ size_t left;
+
+ len = iov->iov_len - iov_ofs;
+ if (len > bytes)
+ len = bytes;
+ left = __copy_from_user_inatomic(vaddr, buf, len);
+ total += len;
+ bytes -= len;
+ vaddr += len;
+ if (unlikely(left)) {
+ /*
+ * Zero the rest of the target like __copy_from_user().
+ */
+ memset(vaddr, 0, bytes);
+ total -= left;
+ break;
+ }
+ if (!bytes)
+ break;
+ iov++;
+ iov_ofs = 0;
+ }
+ return total;
+}
+
+static inline void ntfs_set_next_iovec(const struct iovec **iovp,
+ size_t *iov_ofsp, size_t bytes)
+{
+ const struct iovec *iov = *iovp;
+ size_t iov_ofs = *iov_ofsp;
+
+ while (bytes) {
+ unsigned len;
+
+ len = iov->iov_len - iov_ofs;
+ if (len > bytes)
+ len = bytes;
+ bytes -= len;
+ iov_ofs += len;
+ if (iov->iov_len == iov_ofs) {
+ iov++;
+ iov_ofs = 0;
+ }
+ }
+ *iovp = iov;
+ *iov_ofsp = iov_ofs;
+}
+
+/*
+ * This has the same side-effects and return value as ntfs_copy_from_user().
+ * The difference is that on a fault we need to memset the remainder of the
+ * pages (out to offset + bytes), to emulate ntfs_copy_from_user()'s
+ * single-segment behaviour.
+ *
+ * We call the same helper (__ntfs_copy_from_user_iovec()) both when atomic and
+ * when not atomic. This is ok because __ntfs_copy_from_user_iovec() calls
+ * __copy_from_user_inatomic() and it is ok to call this when non-atomic. In
+ * fact, the only difference between __copy_from_user_inatomic() and
+ * __copy_from_user() is that the latter calls might_sleep(). And on many
+ * architectures __copy_from_user_inatomic() is just defined to
+ * __copy_from_user() so it makes no difference at all on those architectures.
+ */
+static inline size_t ntfs_copy_from_user_iovec(struct page **pages,
+ unsigned nr_pages, unsigned ofs, const struct iovec **iov,
+ size_t *iov_ofs, size_t bytes)
+{
+ struct page **last_page = pages + nr_pages;
+ char *kaddr;
+ size_t copied, len, total = 0;
+
+ do {
+ len = PAGE_CACHE_SIZE - ofs;
+ if (len > bytes)
+ len = bytes;
+ kaddr = kmap_atomic(*pages, KM_USER0);
+ copied = __ntfs_copy_from_user_iovec(kaddr + ofs,
+ *iov, *iov_ofs, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ if (unlikely(copied != len)) {
+ /* Do it the slow way. */
+ kaddr = kmap(*pages);
+ copied = __ntfs_copy_from_user_iovec(kaddr + ofs,
+ *iov, *iov_ofs, len);
+ kunmap(*pages);
+ if (unlikely(copied != len))
+ goto err_out;
+ }
+ total += len;
+ bytes -= len;
+ if (!bytes)
+ break;
+ ntfs_set_next_iovec(iov, iov_ofs, len);
+ ofs = 0;
+ } while (++pages < last_page);
+out:
+ return total;
+err_out:
+ total += copied;
+ /* Zero the rest of the target like __copy_from_user(). */
+ while (++pages < last_page) {
+ bytes -= len;
+ if (!bytes)
+ break;
+ len = PAGE_CACHE_SIZE;
+ if (len > bytes)
+ len = bytes;
+ kaddr = kmap_atomic(*pages, KM_USER0);
+ memset(kaddr, 0, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ }
+ goto out;
+}
+
+static inline void ntfs_flush_dcache_pages(struct page **pages,
+ unsigned nr_pages)
+{
+ BUG_ON(!nr_pages);
+ do {
+ /*
+ * Warning: Do not do the decrement at the same time as the
+ * call because flush_dcache_page() is a NULL macro on i386
+ * and hence the decrement never happens.
+ */
+ flush_dcache_page(pages[nr_pages]);
+ } while (--nr_pages > 0);
+}
+
+/**
+ * ntfs_commit_pages_after_non_resident_write - commit the received data
+ * @pages: array of destination pages
+ * @nr_pages: number of pages in @pages
+ * @pos: byte position in file at which the write begins
+ * @bytes: number of bytes to be written
+ *
+ * See description of ntfs_commit_pages_after_write(), below.
+ */
+static inline int ntfs_commit_pages_after_non_resident_write(
+ struct page **pages, const unsigned nr_pages,
+ s64 pos, size_t bytes)
+{
+ s64 end, initialized_size;
+ struct inode *vi;
+ ntfs_inode *ni, *base_ni;
+ struct buffer_head *bh, *head;
+ ntfs_attr_search_ctx *ctx;
+ MFT_RECORD *m;
+ ATTR_RECORD *a;
+ unsigned long flags;
+ unsigned blocksize, u;
+ int err;
+
+ vi = pages[0]->mapping->host;
+ ni = NTFS_I(vi);
+ blocksize = 1 << vi->i_blkbits;
+ end = pos + bytes;
+ u = 0;
+ do {
+ s64 bh_pos;
+ struct page *page;
+ BOOL partial;
+
+ page = pages[u];
+ bh_pos = (s64)page->index << PAGE_CACHE_SHIFT;
+ bh = head = page_buffers(page);
+ partial = FALSE;
+ do {
+ s64 bh_end;
+
+ bh_end = bh_pos + blocksize;
+ if (bh_end <= pos || bh_pos >= end) {
+ if (!buffer_uptodate(bh))
+ partial = TRUE;
+ } else {
+ set_buffer_uptodate(bh);
+ mark_buffer_dirty(bh);
+ }
+ } while (bh_pos += blocksize, (bh = bh->b_this_page) != head);
+ /*
+ * If all buffers are now uptodate but the page is not, set the
+ * page uptodate.
+ */
+ if (!partial && !PageUptodate(page))
+ SetPageUptodate(page);
+ } while (++u < nr_pages);
+ /*
+ * Finally, if we do not need to update initialized_size or i_size we
+ * are finished.
+ */
+ read_lock_irqsave(&ni->size_lock, flags);
+ initialized_size = ni->initialized_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (end <= initialized_size) {
+ ntfs_debug("Done.");
+ return 0;
+ }
+ /*
+ * Update initialized_size/i_size as appropriate, both in the inode and
+ * the mft record.
+ */
+ if (!NInoAttr(ni))
+ base_ni = ni;
+ else
+ base_ni = ni->ext.base_ntfs_ino;
+ /* Map, pin, and lock the mft record. */
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ m = NULL;
+ ctx = NULL;
+ goto err_out;
+ }
+ BUG_ON(!NInoNonResident(ni));
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ err = -EIO;
+ goto err_out;
+ }
+ a = ctx->attr;
+ BUG_ON(!a->non_resident);
+ write_lock_irqsave(&ni->size_lock, flags);
+ BUG_ON(end > ni->allocated_size);
+ ni->initialized_size = end;
+ a->data.non_resident.initialized_size = cpu_to_sle64(end);
+ if (end > i_size_read(vi)) {
+ i_size_write(vi, end);
+ a->data.non_resident.data_size =
+ a->data.non_resident.initialized_size;
+ }
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ /* Mark the mft record dirty, so it gets written back. */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ ntfs_debug("Done.");
+ return 0;
+err_out:
+ if (ctx)
+ ntfs_attr_put_search_ctx(ctx);
+ if (m)
+ unmap_mft_record(base_ni);
+ ntfs_error(vi->i_sb, "Failed to update initialized_size/i_size (error "
+ "code %i).", err);
+ if (err != -ENOMEM) {
+ NVolSetErrors(ni->vol);
+ make_bad_inode(VFS_I(base_ni));
+ make_bad_inode(vi);
+ }
+ return err;
+}
+
+/**
+ * ntfs_commit_pages_after_write - commit the received data
+ * @pages: array of destination pages
+ * @nr_pages: number of pages in @pages
+ * @pos: byte position in file at which the write begins
+ * @bytes: number of bytes to be written
+ *
+ * This is called from ntfs_file_buffered_write() with i_sem held on the inode
+ * (@pages[0]->mapping->host). There are @nr_pages pages in @pages which are
+ * locked but not kmap()ped. The source data has already been copied into the
+ * @page. ntfs_prepare_pages_for_non_resident_write() has been called before
+ * the data was copied (for non-resident attributes only) and it returned
+ * success.
+ *
+ * Need to set uptodate and mark dirty all buffers within the boundary of the
+ * write. If all buffers in a page are uptodate we set the page uptodate, too.
+ *
+ * Setting the buffers dirty ensures that they get written out later when
+ * ntfs_writepage() is invoked by the VM.
+ *
+ * Finally, we need to update i_size and initialized_size as appropriate both
+ * in the inode and the mft record.
+ *
+ * This is modelled after fs/buffer.c::generic_commit_write(), which marks
+ * buffers uptodate and dirty, sets the page uptodate if all buffers in the
+ * page are uptodate, and updates i_size if the end of io is beyond i_size. In
+ * that case, it also marks the inode dirty.
+ *
+ * If things have gone as outlined in
+ * ntfs_prepare_pages_for_non_resident_write(), we do not need to do any page
+ * content modifications here for non-resident attributes. For resident
+ * attributes we need to do the uptodate bringing here which we combine with
+ * the copying into the mft record which means we save one atomic kmap.
+ *
+ * Return 0 on success or -errno on error.
+ */
+static int ntfs_commit_pages_after_write(struct page **pages,
+ const unsigned nr_pages, s64 pos, size_t bytes)
+{
+ s64 end, initialized_size;
+ loff_t i_size;
+ struct inode *vi;
+ ntfs_inode *ni, *base_ni;
+ struct page *page;
+ ntfs_attr_search_ctx *ctx;
+ MFT_RECORD *m;
+ ATTR_RECORD *a;
+ char *kattr, *kaddr;
+ unsigned long flags;
+ u32 attr_len;
+ int err;
+
+ BUG_ON(!nr_pages);
+ BUG_ON(!pages);
+ page = pages[0];
+ BUG_ON(!page);
+ vi = page->mapping->host;
+ ni = NTFS_I(vi);
+ ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, start page "
+ "index 0x%lx, nr_pages 0x%x, pos 0x%llx, bytes 0x%zx.",
+ vi->i_ino, ni->type, page->index, nr_pages,
+ (long long)pos, bytes);
+ if (NInoNonResident(ni))
+ return ntfs_commit_pages_after_non_resident_write(pages,
+ nr_pages, pos, bytes);
+ BUG_ON(nr_pages > 1);
+ /*
+ * Attribute is resident, implying it is not compressed, encrypted, or
+ * sparse.
+ */
+ if (!NInoAttr(ni))
+ base_ni = ni;
+ else
+ base_ni = ni->ext.base_ntfs_ino;
+ BUG_ON(NInoNonResident(ni));
+ /* Map, pin, and lock the mft record. */
+ m = map_mft_record(base_ni);
+ if (IS_ERR(m)) {
+ err = PTR_ERR(m);
+ m = NULL;
+ ctx = NULL;
+ goto err_out;
+ }
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
+ if (unlikely(!ctx)) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+ err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+ CASE_SENSITIVE, 0, NULL, 0, ctx);
+ if (unlikely(err)) {
+ if (err == -ENOENT)
+ err = -EIO;
+ goto err_out;
+ }
+ a = ctx->attr;
+ BUG_ON(a->non_resident);
+ /* The total length of the attribute value. */
+ attr_len = le32_to_cpu(a->data.resident.value_length);
+ i_size = i_size_read(vi);
+ BUG_ON(attr_len != i_size);
+ BUG_ON(pos > attr_len);
+ end = pos + bytes;
+ BUG_ON(end > le32_to_cpu(a->length) -
+ le16_to_cpu(a->data.resident.value_offset));
+ kattr = (u8*)a + le16_to_cpu(a->data.resident.value_offset);
+ kaddr = kmap_atomic(page, KM_USER0);
+ /* Copy the received data from the page to the mft record. */
+ memcpy(kattr + pos, kaddr + pos, bytes);
+ /* Update the attribute length if necessary. */
+ if (end > attr_len) {
+ attr_len = end;
+ a->data.resident.value_length = cpu_to_le32(attr_len);
+ }
+ /*
+ * If the page is not uptodate, bring the out of bounds area(s)
+ * uptodate by copying data from the mft record to the page.
+ */
+ if (!PageUptodate(page)) {
+ if (pos > 0)
+ memcpy(kaddr, kattr, pos);
+ if (end < attr_len)
+ memcpy(kaddr + end, kattr + end, attr_len - end);
+ /* Zero the region outside the end of the attribute value. */
+ memset(kaddr + attr_len, 0, PAGE_CACHE_SIZE - attr_len);
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ }
+ kunmap_atomic(kaddr, KM_USER0);
+ /* Update initialized_size/i_size if necessary. */
+ read_lock_irqsave(&ni->size_lock, flags);
+ initialized_size = ni->initialized_size;
+ BUG_ON(end > ni->allocated_size);
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ BUG_ON(initialized_size != i_size);
+ if (end > initialized_size) {
+ unsigned long flags;
+
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->initialized_size = end;
+ i_size_write(vi, end);
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ }
+ /* Mark the mft record dirty, so it gets written back. */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ ntfs_debug("Done.");
+ return 0;
+err_out:
+ if (err == -ENOMEM) {
+ ntfs_warning(vi->i_sb, "Error allocating memory required to "
+ "commit the write.");
+ if (PageUptodate(page)) {
+ ntfs_warning(vi->i_sb, "Page is uptodate, setting "
+ "dirty so the write will be retried "
+ "later on by the VM.");
+ /*
+ * Put the page on mapping->dirty_pages, but leave its
+ * buffers' dirty state as-is.
+ */
+ __set_page_dirty_nobuffers(page);
+ err = 0;
+ } else
+ ntfs_error(vi->i_sb, "Page is not uptodate. Written "
+ "data has been lost.");
+ } else {
+ ntfs_error(vi->i_sb, "Resident attribute commit write failed "
+ "with error %i.", err);
+ NVolSetErrors(ni->vol);
+ make_bad_inode(VFS_I(base_ni));
+ make_bad_inode(vi);
+ }
+ if (ctx)
+ ntfs_attr_put_search_ctx(ctx);
+ if (m)
+ unmap_mft_record(base_ni);
+ return err;
+}
+
+/**
+ * ntfs_file_buffered_write -
+ *
+ * Locking: The vfs is holding ->i_sem on the inode.
+ */
+static ssize_t ntfs_file_buffered_write(struct kiocb *iocb,
+ const struct iovec *iov, unsigned long nr_segs,
+ loff_t pos, loff_t *ppos, size_t count)
+{
+ struct file *file = iocb->ki_filp;
+ struct address_space *mapping = file->f_mapping;
+ struct inode *vi = mapping->host;
+ ntfs_inode *ni = NTFS_I(vi);
+ ntfs_volume *vol = ni->vol;
+ struct page *pages[NTFS_MAX_PAGES_PER_CLUSTER];
+ struct page *cached_page = NULL;
+ char __user *buf = NULL;
+ s64 end, ll;
+ VCN last_vcn;
+ LCN lcn;
+ unsigned long flags;
+ size_t bytes, iov_ofs = 0; /* Offset in the current iovec. */
+ ssize_t status, written;
+ unsigned nr_pages;
+ int err;
+ struct pagevec lru_pvec;
+
+ ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, "
+ "pos 0x%llx, count 0x%lx.",
+ vi->i_ino, (unsigned)le32_to_cpu(ni->type),
+ (unsigned long long)pos, (unsigned long)count);
+ if (unlikely(!count))
+ return 0;
+ BUG_ON(NInoMstProtected(ni));
+ /*
+ * If the attribute is not an index root and it is encrypted or
+ * compressed, we cannot write to it yet. Note we need to check for
+ * AT_INDEX_ALLOCATION since this is the type of both directory and
+ * index inodes.
+ */
+ if (ni->type != AT_INDEX_ALLOCATION) {
+ /* If file is encrypted, deny access, just like NT4. */
+ if (NInoEncrypted(ni)) {
+ /*
+ * Reminder for later: Encrypted files are _always_
+ * non-resident so that the content can always be
+ * encrypted.
+ */
+ ntfs_debug("Denying write access to encrypted file.");
+ return -EACCES;
+ }
+ if (NInoCompressed(ni)) {
+ /* Only unnamed $DATA attribute can be compressed. */
+ BUG_ON(ni->type != AT_DATA);
+ BUG_ON(ni->name_len);
+ /*
+ * Reminder for later: If resident, the data is not
+ * actually compressed. Only on the switch to non-
+ * resident does compression kick in. This is in
+ * contrast to encrypted files (see above).
+ */
+ ntfs_error(vi->i_sb, "Writing to compressed files is "
+ "not implemented yet. Sorry.");
+ return -EOPNOTSUPP;
+ }
+ }
+ /*
+ * If a previous ntfs_truncate() failed, repeat it and abort if it
+ * fails again.
+ */
+ if (unlikely(NInoTruncateFailed(ni))) {
+ down_write(&vi->i_alloc_sem);
+ err = ntfs_truncate(vi);
+ up_write(&vi->i_alloc_sem);
+ if (err || NInoTruncateFailed(ni)) {
+ if (!err)
+ err = -EIO;
+ ntfs_error(vol->sb, "Cannot perform write to inode "
+ "0x%lx, attribute type 0x%x, because "
+ "ntfs_truncate() failed (error code "
+ "%i).", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ return err;
+ }
+ }
+ /* The first byte after the write. */
+ end = pos + count;
+ /*
+ * If the write goes beyond the allocated size, extend the allocation
+ * to cover the whole of the write, rounded up to the nearest cluster.
+ */
+ read_lock_irqsave(&ni->size_lock, flags);
+ ll = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (end > ll) {
+ /* Extend the allocation without changing the data size. */
+ ll = ntfs_attr_extend_allocation(ni, end, -1, pos);
+ if (likely(ll >= 0)) {
+ BUG_ON(pos >= ll);
+ /* If the extension was partial truncate the write. */
+ if (end > ll) {
+ ntfs_debug("Truncating write to inode 0x%lx, "
+ "attribute type 0x%x, because "
+ "the allocation was only "
+ "partially extended.",
+ vi->i_ino, (unsigned)
+ le32_to_cpu(ni->type));
+ end = ll;
+ count = ll - pos;
+ }
+ } else {
+ err = ll;
+ read_lock_irqsave(&ni->size_lock, flags);
+ ll = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ /* Perform a partial write if possible or fail. */
+ if (pos < ll) {
+ ntfs_debug("Truncating write to inode 0x%lx, "
+ "attribute type 0x%x, because "
+ "extending the allocation "
+ "failed (error code %i).",
+ vi->i_ino, (unsigned)
+ le32_to_cpu(ni->type), err);
+ end = ll;
+ count = ll - pos;
+ } else {
+ ntfs_error(vol->sb, "Cannot perform write to "
+ "inode 0x%lx, attribute type "
+ "0x%x, because extending the "
+ "allocation failed (error "
+ "code %i).", vi->i_ino,
+ (unsigned)
+ le32_to_cpu(ni->type), err);
+ return err;
+ }
+ }
+ }
+ pagevec_init(&lru_pvec, 0);
+ written = 0;
+ /*
+ * If the write starts beyond the initialized size, extend it up to the
+ * beginning of the write and initialize all non-sparse space between
+ * the old initialized size and the new one. This automatically also
+ * increments the vfs inode->i_size to keep it above or equal to the
+ * initialized_size.
+ */
+ read_lock_irqsave(&ni->size_lock, flags);
+ ll = ni->initialized_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ if (pos > ll) {
+ err = ntfs_attr_extend_initialized(ni, pos, &cached_page,
+ &lru_pvec);
+ if (err < 0) {
+ ntfs_error(vol->sb, "Cannot perform write to inode "
+ "0x%lx, attribute type 0x%x, because "
+ "extending the initialized size "
+ "failed (error code %i).", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ status = err;
+ goto err_out;
+ }
+ }
+ /*
+ * Determine the number of pages per cluster for non-resident
+ * attributes.
+ */
+ nr_pages = 1;
+ if (vol->cluster_size > PAGE_CACHE_SIZE && NInoNonResident(ni))
+ nr_pages = vol->cluster_size >> PAGE_CACHE_SHIFT;
+ /* Finally, perform the actual write. */
+ last_vcn = -1;
+ if (likely(nr_segs == 1))
+ buf = iov->iov_base;
+ do {
+ VCN vcn;
+ pgoff_t idx, start_idx;
+ unsigned ofs, do_pages, u;
+ size_t copied;
+
+ start_idx = idx = pos >> PAGE_CACHE_SHIFT;
+ ofs = pos & ~PAGE_CACHE_MASK;
+ bytes = PAGE_CACHE_SIZE - ofs;
+ do_pages = 1;
+ if (nr_pages > 1) {
+ vcn = pos >> vol->cluster_size_bits;
+ if (vcn != last_vcn) {
+ last_vcn = vcn;
+ /*
+ * Get the lcn of the vcn the write is in. If
+ * it is a hole, need to lock down all pages in
+ * the cluster.
+ */
+ down_read(&ni->runlist.lock);
+ lcn = ntfs_attr_vcn_to_lcn_nolock(ni, pos >>
+ vol->cluster_size_bits, FALSE);
+ up_read(&ni->runlist.lock);
+ if (unlikely(lcn < LCN_HOLE)) {
+ status = -EIO;
+ if (lcn == LCN_ENOMEM)
+ status = -ENOMEM;
+ else
+ ntfs_error(vol->sb, "Cannot "
+ "perform write to "
+ "inode 0x%lx, "
+ "attribute type 0x%x, "
+ "because the attribute "
+ "is corrupt.",
+ vi->i_ino, (unsigned)
+ le32_to_cpu(ni->type));
+ break;
+ }
+ if (lcn == LCN_HOLE) {
+ start_idx = (pos & ~(s64)
+ vol->cluster_size_mask)
+ >> PAGE_CACHE_SHIFT;
+ bytes = vol->cluster_size - (pos &
+ vol->cluster_size_mask);
+ do_pages = nr_pages;
+ }
+ }
+ }
+ if (bytes > count)
+ bytes = count;
+ /*
+ * Bring in the user page(s) that we will copy from _first_.
+ * Otherwise there is a nasty deadlock on copying from the same
+ * page(s) as we are writing to, without it/them being marked
+ * up-to-date. Note, at present there is nothing to stop the
+ * pages being swapped out between us bringing them into memory
+ * and doing the actual copying.
+ */
+ if (likely(nr_segs == 1))
+ ntfs_fault_in_pages_readable(buf, bytes);
+ else
+ ntfs_fault_in_pages_readable_iovec(iov, iov_ofs, bytes);
+ /* Get and lock @do_pages starting at index @start_idx. */
+ status = __ntfs_grab_cache_pages(mapping, start_idx, do_pages,
+ pages, &cached_page, &lru_pvec);
+ if (unlikely(status))
+ break;
+ /*
+ * For non-resident attributes, we need to fill any holes with
+ * actual clusters and ensure all bufferes are mapped. We also
+ * need to bring uptodate any buffers that are only partially
+ * being written to.
+ */
+ if (NInoNonResident(ni)) {
+ status = ntfs_prepare_pages_for_non_resident_write(
+ pages, do_pages, pos, bytes);
+ if (unlikely(status)) {
+ loff_t i_size;
+
+ do {
+ unlock_page(pages[--do_pages]);
+ page_cache_release(pages[do_pages]);
+ } while (do_pages);
+ /*
+ * The write preparation may have instantiated
+ * allocated space outside i_size. Trim this
+ * off again. We can ignore any errors in this
+ * case as we will just be waisting a bit of
+ * allocated space, which is not a disaster.
+ */
+ i_size = i_size_read(vi);
+ if (pos + bytes > i_size)
+ vmtruncate(vi, i_size);
+ break;
+ }
+ }
+ u = (pos >> PAGE_CACHE_SHIFT) - pages[0]->index;
+ if (likely(nr_segs == 1)) {
+ copied = ntfs_copy_from_user(pages + u, do_pages - u,
+ ofs, buf, bytes);
+ buf += copied;
+ } else
+ copied = ntfs_copy_from_user_iovec(pages + u,
+ do_pages - u, ofs, &iov, &iov_ofs,
+ bytes);
+ ntfs_flush_dcache_pages(pages + u, do_pages - u);
+ status = ntfs_commit_pages_after_write(pages, do_pages, pos,
+ bytes);
+ if (likely(!status)) {
+ written += copied;
+ count -= copied;
+ pos += copied;
+ if (unlikely(copied != bytes))
+ status = -EFAULT;
+ }
+ do {
+ unlock_page(pages[--do_pages]);
+ mark_page_accessed(pages[do_pages]);
+ page_cache_release(pages[do_pages]);
+ } while (do_pages);
+ if (unlikely(status))
+ break;
+ balance_dirty_pages_ratelimited(mapping);
+ cond_resched();
+ } while (count);
+err_out:
+ *ppos = pos;
+ if (cached_page)
+ page_cache_release(cached_page);
+ /* For now, when the user asks for O_SYNC, we actually give O_DSYNC. */
+ if (likely(!status)) {
+ if (unlikely((file->f_flags & O_SYNC) || IS_SYNC(vi))) {
+ if (!mapping->a_ops->writepage || !is_sync_kiocb(iocb))
+ status = generic_osync_inode(vi, mapping,
+ OSYNC_METADATA|OSYNC_DATA);
+ }
+ }
+ pagevec_lru_add(&lru_pvec);
+ ntfs_debug("Done. Returning %s (written 0x%lx, status %li).",
+ written ? "written" : "status", (unsigned long)written,
+ (long)status);
+ return written ? written : status;
+}
+
+/**
+ * ntfs_file_aio_write_nolock -
+ */
+static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb,
+ const struct iovec *iov, unsigned long nr_segs, loff_t *ppos)
+{
+ struct file *file = iocb->ki_filp;
+ struct address_space *mapping = file->f_mapping;
+ struct inode *inode = mapping->host;
+ loff_t pos;
+ unsigned long seg;
+ size_t count; /* after file limit checks */
+ ssize_t written, err;
+
+ count = 0;
+ for (seg = 0; seg < nr_segs; seg++) {
+ const struct iovec *iv = &iov[seg];
+ /*
+ * If any segment has a negative length, or the cumulative
+ * length ever wraps negative then return -EINVAL.
+ */
+ count += iv->iov_len;
+ if (unlikely((ssize_t)(count|iv->iov_len) < 0))
+ return -EINVAL;
+ if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len))
+ continue;
+ if (!seg)
+ return -EFAULT;
+ nr_segs = seg;
+ count -= iv->iov_len; /* This segment is no good */
+ break;
+ }
+ pos = *ppos;
+ vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
+ /* We can write back this queue in page reclaim. */
+ current->backing_dev_info = mapping->backing_dev_info;
+ written = 0;
+ err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
+ if (err)
+ goto out;
+ if (!count)
+ goto out;
+ err = remove_suid(file->f_dentry);
+ if (err)
+ goto out;
+ inode_update_time(inode, 1);
+ written = ntfs_file_buffered_write(iocb, iov, nr_segs, pos, ppos,
+ count);
+out:
+ current->backing_dev_info = NULL;
+ return written ? written : err;
+}
+
+/**
+ * ntfs_file_aio_write -
+ */
+static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const char __user *buf,
+ size_t count, loff_t pos)
+{
+ struct file *file = iocb->ki_filp;
+ struct address_space *mapping = file->f_mapping;
+ struct inode *inode = mapping->host;
+ ssize_t ret;
+ struct iovec local_iov = { .iov_base = (void __user *)buf,
+ .iov_len = count };
+
+ BUG_ON(iocb->ki_pos != pos);
+
+ down(&inode->i_sem);
+ ret = ntfs_file_aio_write_nolock(iocb, &local_iov, 1, &iocb->ki_pos);
+ up(&inode->i_sem);
+ if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
+ int err = sync_page_range(inode, mapping, pos, ret);
+ if (err < 0)
+ ret = err;
+ }
+ return ret;
+}
+
+/**
+ * ntfs_file_writev -
+ *
+ * Basically the same as generic_file_writev() except that it ends up calling
+ * ntfs_file_aio_write_nolock() instead of __generic_file_aio_write_nolock().
+ */
+static ssize_t ntfs_file_writev(struct file *file, const struct iovec *iov,
+ unsigned long nr_segs, loff_t *ppos)
+{
+ struct address_space *mapping = file->f_mapping;
+ struct inode *inode = mapping->host;
+ struct kiocb kiocb;
+ ssize_t ret;
+
+ down(&inode->i_sem);
+ init_sync_kiocb(&kiocb, file);
+ ret = ntfs_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos);
+ if (ret == -EIOCBQUEUED)
+ ret = wait_on_sync_kiocb(&kiocb);
+ up(&inode->i_sem);
+ if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
+ int err = sync_page_range(inode, mapping, *ppos - ret, ret);
+ if (err < 0)
+ ret = err;
+ }
+ return ret;
+}
+
+/**
+ * ntfs_file_write - simple wrapper for ntfs_file_writev()
+ */
+static ssize_t ntfs_file_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct iovec local_iov = { .iov_base = (void __user *)buf,
+ .iov_len = count };
+
+ return ntfs_file_writev(file, &local_iov, 1, ppos);
+}
+
/**
* ntfs_file_fsync - sync a file to disk
* @filp: file to be synced
#endif /* NTFS_RW */
struct file_operations ntfs_file_ops = {
- .llseek = generic_file_llseek, /* Seek inside file. */
- .read = generic_file_read, /* Read from file. */
- .aio_read = generic_file_aio_read, /* Async read from file. */
- .readv = generic_file_readv, /* Read from file. */
+ .llseek = generic_file_llseek, /* Seek inside file. */
+ .read = generic_file_read, /* Read from file. */
+ .aio_read = generic_file_aio_read, /* Async read from file. */
+ .readv = generic_file_readv, /* Read from file. */
#ifdef NTFS_RW
- .write = generic_file_write, /* Write to file. */
- .aio_write = generic_file_aio_write, /* Async write to file. */
- .writev = generic_file_writev, /* Write to file. */
- /*.release = ,*/ /* Last file is closed. See
- fs/ext2/file.c::
- ext2_release_file() for
- how to use this to discard
- preallocated space for
- write opened files. */
- .fsync = ntfs_file_fsync, /* Sync a file to disk. */
- /*.aio_fsync = ,*/ /* Sync all outstanding async
- i/o operations on a
- kiocb. */
+ .write = ntfs_file_write, /* Write to file. */
+ .aio_write = ntfs_file_aio_write, /* Async write to file. */
+ .writev = ntfs_file_writev, /* Write to file. */
+ /*.release = ,*/ /* Last file is closed. See
+ fs/ext2/file.c::
+ ext2_release_file() for
+ how to use this to discard
+ preallocated space for
+ write opened files. */
+ .fsync = ntfs_file_fsync, /* Sync a file to disk. */
+ /*.aio_fsync = ,*/ /* Sync all outstanding async
+ i/o operations on a
+ kiocb. */
#endif /* NTFS_RW */
- /*.ioctl = ,*/ /* Perform function on the
- mounted filesystem. */
- .mmap = generic_file_mmap, /* Mmap file. */
- .open = ntfs_file_open, /* Open file. */
- .sendfile = generic_file_sendfile, /* Zero-copy data send with
- the data source being on
- the ntfs partition. We
- do not need to care about
- the data destination. */
- /*.sendpage = ,*/ /* Zero-copy data send with
- the data destination being
- on the ntfs partition. We
- do not need to care about
- the data source. */
+ /*.ioctl = ,*/ /* Perform function on the
+ mounted filesystem. */
+ .mmap = generic_file_mmap, /* Mmap file. */
+ .open = ntfs_file_open, /* Open file. */
+ .sendfile = generic_file_sendfile, /* Zero-copy data send with
+ the data source being on
+ the ntfs partition. We do
+ not need to care about the
+ data destination. */
+ /*.sendpage = ,*/ /* Zero-copy data send with
+ the data destination being
+ on the ntfs partition. We
+ do not need to care about
+ the data source. */
};
struct inode_operations ntfs_file_inode_ops = {
#include "debug.h"
#include "inode.h"
#include "attrib.h"
+#include "lcnalloc.h"
#include "malloc.h"
#include "mft.h"
#include "time.h"
#ifdef NTFS_RW
+static const char *es = " Leaving inconsistent metadata. Unmount and run "
+ "chkdsk.";
+
/**
* ntfs_truncate - called when the i_size of an ntfs inode is changed
* @vi: inode for which the i_size was changed
*
- * We do not support i_size changes yet.
+ * We only support i_size changes for normal files at present, i.e. not
+ * compressed and not encrypted. This is enforced in ntfs_setattr(), see
+ * below.
*
* The kernel guarantees that @vi is a regular file (S_ISREG() is true) and
* that the change is allowed.
* Returns 0 on success or -errno on error.
*
* Called with ->i_sem held. In all but one case ->i_alloc_sem is held for
- * writing. The only case where ->i_alloc_sem is not held is
+ * writing. The only case in the kernel where ->i_alloc_sem is not held is
* mm/filemap.c::generic_file_buffered_write() where vmtruncate() is called
- * with the current i_size as the offset which means that it is a noop as far
- * as ntfs_truncate() is concerned.
+ * with the current i_size as the offset. The analogous place in NTFS is in
+ * fs/ntfs/file.c::ntfs_file_buffered_write() where we call vmtruncate() again
+ * without holding ->i_alloc_sem.
*/
int ntfs_truncate(struct inode *vi)
{
- ntfs_inode *ni = NTFS_I(vi);
+ s64 new_size, old_size, nr_freed, new_alloc_size, old_alloc_size;
+ VCN highest_vcn;
+ unsigned long flags;
+ ntfs_inode *base_ni, *ni = NTFS_I(vi);
ntfs_volume *vol = ni->vol;
ntfs_attr_search_ctx *ctx;
MFT_RECORD *m;
ATTR_RECORD *a;
const char *te = " Leaving file length out of sync with i_size.";
- int err;
+ int err, mp_size, size_change, alloc_change;
+ u32 attr_len;
ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
BUG_ON(NInoAttr(ni));
+ BUG_ON(S_ISDIR(vi->i_mode));
+ BUG_ON(NInoMstProtected(ni));
BUG_ON(ni->nr_extents < 0);
- m = map_mft_record(ni);
+retry_truncate:
+ /*
+ * Lock the runlist for writing and map the mft record to ensure it is
+ * safe to mess with the attribute runlist and sizes.
+ */
+ down_write(&ni->runlist.lock);
+ if (!NInoAttr(ni))
+ base_ni = ni;
+ else
+ base_ni = ni->ext.base_ntfs_ino;
+ m = map_mft_record(base_ni);
if (IS_ERR(m)) {
err = PTR_ERR(m);
ntfs_error(vi->i_sb, "Failed to map mft record for inode 0x%lx "
"(error code %d).%s", vi->i_ino, err, te);
ctx = NULL;
m = NULL;
- goto err_out;
+ goto old_bad_out;
}
- ctx = ntfs_attr_get_search_ctx(ni, m);
+ ctx = ntfs_attr_get_search_ctx(base_ni, m);
if (unlikely(!ctx)) {
ntfs_error(vi->i_sb, "Failed to allocate a search context for "
"inode 0x%lx (not enough memory).%s",
vi->i_ino, te);
err = -ENOMEM;
- goto err_out;
+ goto old_bad_out;
}
err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
CASE_SENSITIVE, 0, NULL, 0, ctx);
if (unlikely(err)) {
- if (err == -ENOENT)
+ if (err == -ENOENT) {
ntfs_error(vi->i_sb, "Open attribute is missing from "
"mft record. Inode 0x%lx is corrupt. "
- "Run chkdsk.", vi->i_ino);
- else
+ "Run chkdsk.%s", vi->i_ino, te);
+ err = -EIO;
+ } else
ntfs_error(vi->i_sb, "Failed to lookup attribute in "
- "inode 0x%lx (error code %d).",
- vi->i_ino, err);
- goto err_out;
+ "inode 0x%lx (error code %d).%s",
+ vi->i_ino, err, te);
+ goto old_bad_out;
}
+ m = ctx->mrec;
a = ctx->attr;
- /* If the size has not changed there is nothing to do. */
- if (ntfs_attr_size(a) == i_size_read(vi))
- goto done;
- // TODO: Implement the truncate...
- ntfs_error(vi->i_sb, "Inode size has changed but this is not "
- "implemented yet. Resetting inode size to old value. "
- " This is most likely a bug in the ntfs driver!");
- i_size_write(vi, ntfs_attr_size(a));
-done:
+ /*
+ * The i_size of the vfs inode is the new size for the attribute value.
+ */
+ new_size = i_size_read(vi);
+ /* The current size of the attribute value is the old size. */
+ old_size = ntfs_attr_size(a);
+ /* Calculate the new allocated size. */
+ if (NInoNonResident(ni))
+ new_alloc_size = (new_size + vol->cluster_size - 1) &
+ ~(s64)vol->cluster_size_mask;
+ else
+ new_alloc_size = (new_size + 7) & ~7;
+ /* The current allocated size is the old allocated size. */
+ read_lock_irqsave(&ni->size_lock, flags);
+ old_alloc_size = ni->allocated_size;
+ read_unlock_irqrestore(&ni->size_lock, flags);
+ /*
+ * The change in the file size. This will be 0 if no change, >0 if the
+ * size is growing, and <0 if the size is shrinking.
+ */
+ size_change = -1;
+ if (new_size - old_size >= 0) {
+ size_change = 1;
+ if (new_size == old_size)
+ size_change = 0;
+ }
+ /* As above for the allocated size. */
+ alloc_change = -1;
+ if (new_alloc_size - old_alloc_size >= 0) {
+ alloc_change = 1;
+ if (new_alloc_size == old_alloc_size)
+ alloc_change = 0;
+ }
+ /*
+ * If neither the size nor the allocation are being changed there is
+ * nothing to do.
+ */
+ if (!size_change && !alloc_change)
+ goto unm_done;
+ /* If the size is changing, check if new size is allowed in $AttrDef. */
+ if (size_change) {
+ err = ntfs_attr_size_bounds_check(vol, ni->type, new_size);
+ if (unlikely(err)) {
+ if (err == -ERANGE) {
+ ntfs_error(vol->sb, "Truncate would cause the "
+ "inode 0x%lx to %simum size "
+ "for its attribute type "
+ "(0x%x). Aborting truncate.",
+ vi->i_ino,
+ new_size > old_size ? "exceed "
+ "the max" : "go under the min",
+ le32_to_cpu(ni->type));
+ err = -EFBIG;
+ } else {
+ ntfs_error(vol->sb, "Inode 0x%lx has unknown "
+ "attribute type 0x%x. "
+ "Aborting truncate.",
+ vi->i_ino,
+ le32_to_cpu(ni->type));
+ err = -EIO;
+ }
+ /* Reset the vfs inode size to the old size. */
+ i_size_write(vi, old_size);
+ goto err_out;
+ }
+ }
+ if (NInoCompressed(ni) || NInoEncrypted(ni)) {
+ ntfs_warning(vi->i_sb, "Changes in inode size are not "
+ "supported yet for %s files, ignoring.",
+ NInoCompressed(ni) ? "compressed" :
+ "encrypted");
+ err = -EOPNOTSUPP;
+ goto bad_out;
+ }
+ if (a->non_resident)
+ goto do_non_resident_truncate;
+ BUG_ON(NInoNonResident(ni));
+ /* Resize the attribute record to best fit the new attribute size. */
+ if (new_size < vol->mft_record_size &&
+ !ntfs_resident_attr_value_resize(m, a, new_size)) {
+ unsigned long flags;
+
+ /* The resize succeeded! */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ write_lock_irqsave(&ni->size_lock, flags);
+ /* Update the sizes in the ntfs inode and all is done. */
+ ni->allocated_size = le32_to_cpu(a->length) -
+ le16_to_cpu(a->data.resident.value_offset);
+ /*
+ * Note ntfs_resident_attr_value_resize() has already done any
+ * necessary data clearing in the attribute record. When the
+ * file is being shrunk vmtruncate() will already have cleared
+ * the top part of the last partial page, i.e. since this is
+ * the resident case this is the page with index 0. However,
+ * when the file is being expanded, the page cache page data
+ * between the old data_size, i.e. old_size, and the new_size
+ * has not been zeroed. Fortunately, we do not need to zero it
+ * either since on one hand it will either already be zero due
+ * to both readpage and writepage clearing partial page data
+ * beyond i_size in which case there is nothing to do or in the
+ * case of the file being mmap()ped at the same time, POSIX
+ * specifies that the behaviour is unspecified thus we do not
+ * have to do anything. This means that in our implementation
+ * in the rare case that the file is mmap()ped and a write
+ * occured into the mmap()ped region just beyond the file size
+ * and writepage has not yet been called to write out the page
+ * (which would clear the area beyond the file size) and we now
+ * extend the file size to incorporate this dirty region
+ * outside the file size, a write of the page would result in
+ * this data being written to disk instead of being cleared.
+ * Given both POSIX and the Linux mmap(2) man page specify that
+ * this corner case is undefined, we choose to leave it like
+ * that as this is much simpler for us as we cannot lock the
+ * relevant page now since we are holding too many ntfs locks
+ * which would result in a lock reversal deadlock.
+ */
+ ni->initialized_size = new_size;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ goto unm_done;
+ }
+ /* If the above resize failed, this must be an attribute extension. */
+ BUG_ON(size_change < 0);
+ /*
+ * We have to drop all the locks so we can call
+ * ntfs_attr_make_non_resident(). This could be optimised by try-
+ * locking the first page cache page and only if that fails dropping
+ * the locks, locking the page, and redoing all the locking and
+ * lookups. While this would be a huge optimisation, it is not worth
+ * it as this is definitely a slow code path as it only ever can happen
+ * once for any given file.
+ */
ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(ni);
- NInoClearTruncateFailed(ni);
- ntfs_debug("Done.");
- return 0;
-err_out:
- if (err != -ENOMEM) {
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+ /*
+ * Not enough space in the mft record, try to make the attribute
+ * non-resident and if successful restart the truncation process.
+ */
+ err = ntfs_attr_make_non_resident(ni, old_size);
+ if (likely(!err))
+ goto retry_truncate;
+ /*
+ * Could not make non-resident. If this is due to this not being
+ * permitted for this attribute type or there not being enough space,
+ * try to make other attributes non-resident. Otherwise fail.
+ */
+ if (unlikely(err != -EPERM && err != -ENOSPC)) {
+ ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, attribute "
+ "type 0x%x, because the conversion from "
+ "resident to non-resident attribute failed "
+ "with error code %i.", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), err);
+ if (err != -ENOMEM)
+ err = -EIO;
+ goto conv_err_out;
+ }
+ /* TODO: Not implemented from here, abort. */
+ if (err == -ENOSPC)
+ ntfs_error(vol->sb, "Not enough space in the mft record/on "
+ "disk for the non-resident attribute value. "
+ "This case is not implemented yet.");
+ else /* if (err == -EPERM) */
+ ntfs_error(vol->sb, "This attribute type may not be "
+ "non-resident. This case is not implemented "
+ "yet.");
+ err = -EOPNOTSUPP;
+ goto conv_err_out;
+#if 0
+ // TODO: Attempt to make other attributes non-resident.
+ if (!err)
+ goto do_resident_extend;
+ /*
+ * Both the attribute list attribute and the standard information
+ * attribute must remain in the base inode. Thus, if this is one of
+ * these attributes, we have to try to move other attributes out into
+ * extent mft records instead.
+ */
+ if (ni->type == AT_ATTRIBUTE_LIST ||
+ ni->type == AT_STANDARD_INFORMATION) {
+ // TODO: Attempt to move other attributes into extent mft
+ // records.
+ err = -EOPNOTSUPP;
+ if (!err)
+ goto do_resident_extend;
+ goto err_out;
+ }
+ // TODO: Attempt to move this attribute to an extent mft record, but
+ // only if it is not already the only attribute in an mft record in
+ // which case there would be nothing to gain.
+ err = -EOPNOTSUPP;
+ if (!err)
+ goto do_resident_extend;
+ /* There is nothing we can do to make enough space. )-: */
+ goto err_out;
+#endif
+do_non_resident_truncate:
+ BUG_ON(!NInoNonResident(ni));
+ if (alloc_change < 0) {
+ highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
+ if (highest_vcn > 0 &&
+ old_alloc_size >> vol->cluster_size_bits >
+ highest_vcn + 1) {
+ /*
+ * This attribute has multiple extents. Not yet
+ * supported.
+ */
+ ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, "
+ "attribute type 0x%x, because the "
+ "attribute is highly fragmented (it "
+ "consists of multiple extents) and "
+ "this case is not implemented yet.",
+ vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type));
+ err = -EOPNOTSUPP;
+ goto bad_out;
+ }
+ }
+ /*
+ * If the size is shrinking, need to reduce the initialized_size and
+ * the data_size before reducing the allocation.
+ */
+ if (size_change < 0) {
+ /*
+ * Make the valid size smaller (i_size is already up-to-date).
+ */
+ write_lock_irqsave(&ni->size_lock, flags);
+ if (new_size < ni->initialized_size) {
+ ni->initialized_size = new_size;
+ a->data.non_resident.initialized_size =
+ cpu_to_sle64(new_size);
+ }
+ a->data.non_resident.data_size = cpu_to_sle64(new_size);
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+ /* If the allocated size is not changing, we are done. */
+ if (!alloc_change)
+ goto unm_done;
+ /*
+ * If the size is shrinking it makes no sense for the
+ * allocation to be growing.
+ */
+ BUG_ON(alloc_change > 0);
+ } else /* if (size_change >= 0) */ {
+ /*
+ * The file size is growing or staying the same but the
+ * allocation can be shrinking, growing or staying the same.
+ */
+ if (alloc_change > 0) {
+ /*
+ * We need to extend the allocation and possibly update
+ * the data size. If we are updating the data size,
+ * since we are not touching the initialized_size we do
+ * not need to worry about the actual data on disk.
+ * And as far as the page cache is concerned, there
+ * will be no pages beyond the old data size and any
+ * partial region in the last page between the old and
+ * new data size (or the end of the page if the new
+ * data size is outside the page) does not need to be
+ * modified as explained above for the resident
+ * attribute truncate case. To do this, we simply drop
+ * the locks we hold and leave all the work to our
+ * friendly helper ntfs_attr_extend_allocation().
+ */
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+ err = ntfs_attr_extend_allocation(ni, new_size,
+ size_change > 0 ? new_size : -1, -1);
+ /*
+ * ntfs_attr_extend_allocation() will have done error
+ * output already.
+ */
+ goto done;
+ }
+ if (!alloc_change)
+ goto alloc_done;
+ }
+ /* alloc_change < 0 */
+ /* Free the clusters. */
+ nr_freed = ntfs_cluster_free(ni, new_alloc_size >>
+ vol->cluster_size_bits, -1, ctx);
+ m = ctx->mrec;
+ a = ctx->attr;
+ if (unlikely(nr_freed < 0)) {
+ ntfs_error(vol->sb, "Failed to release cluster(s) (error code "
+ "%lli). Unmount and run chkdsk to recover "
+ "the lost cluster(s).", (long long)nr_freed);
NVolSetErrors(vol);
+ nr_freed = 0;
+ }
+ /* Truncate the runlist. */
+ err = ntfs_rl_truncate_nolock(vol, &ni->runlist,
+ new_alloc_size >> vol->cluster_size_bits);
+ /*
+ * If the runlist truncation failed and/or the search context is no
+ * longer valid, we cannot resize the attribute record or build the
+ * mapping pairs array thus we mark the inode bad so that no access to
+ * the freed clusters can happen.
+ */
+ if (unlikely(err || IS_ERR(m))) {
+ ntfs_error(vol->sb, "Failed to %s (error code %li).%s",
+ IS_ERR(m) ?
+ "restore attribute search context" :
+ "truncate attribute runlist",
+ IS_ERR(m) ? PTR_ERR(m) : err, es);
+ err = -EIO;
+ goto bad_out;
+ }
+ /* Get the size for the shrunk mapping pairs array for the runlist. */
+ mp_size = ntfs_get_size_for_mapping_pairs(vol, ni->runlist.rl, 0, -1);
+ if (unlikely(mp_size <= 0)) {
+ ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
+ "attribute type 0x%x, because determining the "
+ "size for the mapping pairs failed with error "
+ "code %i.%s", vi->i_ino,
+ (unsigned)le32_to_cpu(ni->type), mp_size, es);
+ err = -EIO;
+ goto bad_out;
+ }
+ /*
+ * Shrink the attribute record for the new mapping pairs array. Note,
+ * this cannot fail since we are making the attribute smaller thus by
+ * definition there is enough space to do so.
+ */
+ attr_len = le32_to_cpu(a->length);
+ err = ntfs_attr_record_resize(m, a, mp_size +
+ le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
+ BUG_ON(err);
+ /*
+ * Generate the mapping pairs array directly into the attribute record.
+ */
+ err = ntfs_mapping_pairs_build(vol, (u8*)a +
+ le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
+ mp_size, ni->runlist.rl, 0, -1, NULL);
+ if (unlikely(err)) {
+ ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
+ "attribute type 0x%x, because building the "
+ "mapping pairs failed with error code %i.%s",
+ vi->i_ino, (unsigned)le32_to_cpu(ni->type),
+ err, es);
+ err = -EIO;
+ goto bad_out;
+ }
+ /* Update the allocated/compressed size as well as the highest vcn. */
+ a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >>
+ vol->cluster_size_bits) - 1);
+ write_lock_irqsave(&ni->size_lock, flags);
+ ni->allocated_size = new_alloc_size;
+ a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size);
+ if (NInoSparse(ni) || NInoCompressed(ni)) {
+ if (nr_freed) {
+ ni->itype.compressed.size -= nr_freed <<
+ vol->cluster_size_bits;
+ BUG_ON(ni->itype.compressed.size < 0);
+ a->data.non_resident.compressed_size = cpu_to_sle64(
+ ni->itype.compressed.size);
+ vi->i_blocks = ni->itype.compressed.size >> 9;
+ }
+ } else
+ vi->i_blocks = new_alloc_size >> 9;
+ write_unlock_irqrestore(&ni->size_lock, flags);
+ /*
+ * We have shrunk the allocation. If this is a shrinking truncate we
+ * have already dealt with the initialized_size and the data_size above
+ * and we are done. If the truncate is only changing the allocation
+ * and not the data_size, we are also done. If this is an extending
+ * truncate, need to extend the data_size now which is ensured by the
+ * fact that @size_change is positive.
+ */
+alloc_done:
+ /*
+ * If the size is growing, need to update it now. If it is shrinking,
+ * we have already updated it above (before the allocation change).
+ */
+ if (size_change > 0)
+ a->data.non_resident.data_size = cpu_to_sle64(new_size);
+ /* Ensure the modified mft record is written out. */
+ flush_dcache_mft_record_page(ctx->ntfs_ino);
+ mark_mft_record_dirty(ctx->ntfs_ino);
+unm_done:
+ ntfs_attr_put_search_ctx(ctx);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+done:
+ /* Update the mtime and ctime on the base inode. */
+ inode_update_time(VFS_I(base_ni), 1);
+ if (likely(!err)) {
+ NInoClearTruncateFailed(ni);
+ ntfs_debug("Done.");
+ }
+ return err;
+old_bad_out:
+ old_size = -1;
+bad_out:
+ if (err != -ENOMEM && err != -EOPNOTSUPP) {
make_bad_inode(vi);
+ make_bad_inode(VFS_I(base_ni));
+ NVolSetErrors(vol);
}
+ if (err != -EOPNOTSUPP)
+ NInoSetTruncateFailed(ni);
+ else if (old_size >= 0)
+ i_size_write(vi, old_size);
+err_out:
if (ctx)
ntfs_attr_put_search_ctx(ctx);
if (m)
- unmap_mft_record(ni);
- NInoSetTruncateFailed(ni);
+ unmap_mft_record(base_ni);
+ up_write(&ni->runlist.lock);
+out:
+ ntfs_debug("Failed. Returning error code %i.", err);
return err;
+conv_err_out:
+ if (err != -ENOMEM && err != -EOPNOTSUPP) {
+ make_bad_inode(vi);
+ make_bad_inode(VFS_I(base_ni));
+ NVolSetErrors(vol);
+ }
+ if (err != -EOPNOTSUPP)
+ NInoSetTruncateFailed(ni);
+ else
+ i_size_write(vi, old_size);
+ goto out;
}
/**
err = inode_change_ok(vi, attr);
if (err)
- return err;
-
+ goto out;
/* We do not support NTFS ACLs yet. */
if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) {
ntfs_warning(vi->i_sb, "Changes in user/group/mode are not "
err = -EOPNOTSUPP;
goto out;
}
-
if (ia_valid & ATTR_SIZE) {
if (attr->ia_size != i_size_read(vi)) {
- ntfs_warning(vi->i_sb, "Changes in inode size are not "
- "supported yet, ignoring.");
- err = -EOPNOTSUPP;
- // TODO: Implement...
- // err = vmtruncate(vi, attr->ia_size);
+ ntfs_inode *ni = NTFS_I(vi);
+ /*
+ * FIXME: For now we do not support resizing of
+ * compressed or encrypted files yet.
+ */
+ if (NInoCompressed(ni) || NInoEncrypted(ni)) {
+ ntfs_warning(vi->i_sb, "Changes in inode size "
+ "are not supported yet for "
+ "%s files, ignoring.",
+ NInoCompressed(ni) ?
+ "compressed" : "encrypted");
+ err = -EOPNOTSUPP;
+ } else
+ err = vmtruncate(vi, attr->ia_size);
if (err || ia_valid == ATTR_SIZE)
goto out;
} else {
FILE_NAME_POSIX = 0x00,
/* This is the largest namespace. It is case sensitive and allows all
Unicode characters except for: '\0' and '/'. Beware that in
- WinNT/2k files which eg have the same name except for their case
- will not be distinguished by the standard utilities and thus a "del
- filename" will delete both "filename" and "fileName" without
- warning. */
+ WinNT/2k/2003 by default files which eg have the same name except
+ for their case will not be distinguished by the standard utilities
+ and thus a "del filename" will delete both "filename" and "fileName"
+ without warning. However if for example Services For Unix (SFU) are
+ installed and the case sensitive option was enabled at installation
+ time, then you can create/access/delete such files.
+ Note that even SFU places restrictions on the filenames beyond the
+ '\0' and '/' and in particular the following set of characters is
+ not allowed: '"', '/', '<', '>', '\'. All other characters,
+ including the ones no allowed in WIN32 namespace are allowed.
+ Tested with SFU 3.5 (this is now free) running on Windows XP. */
FILE_NAME_WIN32 = 0x01,
/* The standard WinNT/2k NTFS long filenames. Case insensitive. All
Unicode chars except: '\0', '"', '*', '/', ':', '<', '>', '?', '\',
* Extended attribute flags (8-bit).
*/
enum {
- NEED_EA = 0x80
+ NEED_EA = 0x80 /* If set the file to which the EA belongs
+ cannot be interpreted without understanding
+ the associates extended attributes. */
} __attribute__ ((__packed__));
typedef u8 EA_FLAGS;
/*
* Attribute: Extended attribute (EA) (0xe0).
*
- * NOTE: Always non-resident. (Is this true?)
+ * NOTE: Can be resident or non-resident.
*
* Like the attribute list and the index buffer list, the EA attribute value is
* a sequence of EA_ATTR variable length records.
- *
- * FIXME: It appears weird that the EA name is not unicode. Is it true?
*/
typedef struct {
le32 next_entry_offset; /* Offset to the next EA_ATTR. */
EA_FLAGS flags; /* Flags describing the EA. */
- u8 ea_name_length; /* Length of the name of the EA in bytes. */
+ u8 ea_name_length; /* Length of the name of the EA in bytes
+ excluding the '\0' byte terminator. */
le16 ea_value_length; /* Byte size of the EA's value. */
- u8 ea_name[0]; /* Name of the EA. */
- u8 ea_value[0]; /* The value of the EA. Immediately follows
+ u8 ea_name[0]; /* Name of the EA. Note this is ASCII, not
+ Unicode and it is zero terminated. */
+ u8 ea_value[0]; /* The value of the EA. Immediately follows
the name. */
} __attribute__ ((__packed__)) EA_ATTR;
* @count: number of clusters to allocate
* @start_lcn: starting lcn at which to allocate the clusters (or -1 if none)
* @zone: zone from which to allocate the clusters
+ * @is_extension: if TRUE, this is an attribute extension
*
* Allocate @count clusters preferably starting at cluster @start_lcn or at the
* current allocator position if @start_lcn is -1, on the mounted ntfs volume
* @start_vcn specifies the vcn of the first allocated cluster. This makes
* merging the resulting runlist with the old runlist easier.
*
+ * If @is_extension is TRUE, the caller is allocating clusters to extend an
+ * attribute and if it is FALSE, the caller is allocating clusters to fill a
+ * hole in an attribute. Practically the difference is that if @is_extension
+ * is TRUE the returned runlist will be terminated with LCN_ENOENT and if
+ * @is_extension is FALSE the runlist will be terminated with
+ * LCN_RL_NOT_MAPPED.
+ *
* You need to check the return value with IS_ERR(). If this is false, the
* function was successful and the return value is a runlist describing the
* allocated cluster(s). If IS_ERR() is true, the function failed and
*/
runlist_element *ntfs_cluster_alloc(ntfs_volume *vol, const VCN start_vcn,
const s64 count, const LCN start_lcn,
- const NTFS_CLUSTER_ALLOCATION_ZONES zone)
+ const NTFS_CLUSTER_ALLOCATION_ZONES zone,
+ const BOOL is_extension)
{
LCN zone_start, zone_end, bmp_pos, bmp_initial_pos, last_read_pos, lcn;
LCN prev_lcn = 0, prev_run_len = 0, mft_zone_size;
continue;
}
bit = 1 << (lcn & 7);
- ntfs_debug("bit %i.", bit);
+ ntfs_debug("bit 0x%x.", bit);
/* If the bit is already set, go onto the next one. */
if (*byte & bit) {
lcn++;
/* Add runlist terminator element. */
if (likely(rl)) {
rl[rlpos].vcn = rl[rlpos - 1].vcn + rl[rlpos - 1].length;
- rl[rlpos].lcn = LCN_RL_NOT_MAPPED;
+ rl[rlpos].lcn = is_extension ? LCN_ENOENT : LCN_RL_NOT_MAPPED;
rl[rlpos].length = 0;
}
if (likely(page && !IS_ERR(page))) {
* @ni: ntfs inode whose runlist describes the clusters to free
* @start_vcn: vcn in the runlist of @ni at which to start freeing clusters
* @count: number of clusters to free or -1 for all clusters
+ * @ctx: active attribute search context if present or NULL if not
* @is_rollback: true if this is a rollback operation
*
* Free @count clusters starting at the cluster @start_vcn in the runlist
* deallocated. Thus, to completely free all clusters in a runlist, use
* @start_vcn = 0 and @count = -1.
*
+ * If @ctx is specified, it is an active search context of @ni and its base mft
+ * record. This is needed when __ntfs_cluster_free() encounters unmapped
+ * runlist fragments and allows their mapping. If you do not have the mft
+ * record mapped, you can specify @ctx as NULL and __ntfs_cluster_free() will
+ * perform the necessary mapping and unmapping.
+ *
+ * Note, __ntfs_cluster_free() saves the state of @ctx on entry and restores it
+ * before returning. Thus, @ctx will be left pointing to the same attribute on
+ * return as on entry. However, the actual pointers in @ctx may point to
+ * different memory locations on return, so you must remember to reset any
+ * cached pointers from the @ctx, i.e. after the call to __ntfs_cluster_free(),
+ * you will probably want to do:
+ * m = ctx->mrec;
+ * a = ctx->attr;
+ * Assuming you cache ctx->attr in a variable @a of type ATTR_RECORD * and that
+ * you cache ctx->mrec in a variable @m of type MFT_RECORD *.
+ *
* @is_rollback should always be FALSE, it is for internal use to rollback
* errors. You probably want to use ntfs_cluster_free() instead.
*
- * Note, ntfs_cluster_free() does not modify the runlist at all, so the caller
- * has to deal with it later.
+ * Note, __ntfs_cluster_free() does not modify the runlist, so you have to
+ * remove from the runlist or mark sparse the freed runs later.
*
* Return the number of deallocated clusters (not counting sparse ones) on
* success and -errno on error.
*
+ * WARNING: If @ctx is supplied, regardless of whether success or failure is
+ * returned, you need to check IS_ERR(@ctx->mrec) and if TRUE the @ctx
+ * is no longer valid, i.e. you need to either call
+ * ntfs_attr_reinit_search_ctx() or ntfs_attr_put_search_ctx() on it.
+ * In that case PTR_ERR(@ctx->mrec) will give you the error code for
+ * why the mapping of the old inode failed.
+ *
* Locking: - The runlist described by @ni must be locked for writing on entry
* and is locked on return. Note the runlist may be modified when
* needed runlist fragments need to be mapped.
* on return.
* - This function takes the volume lcn bitmap lock for writing and
* modifies the bitmap contents.
+ * - If @ctx is NULL, the base mft record of @ni must not be mapped on
+ * entry and it will be left unmapped on return.
+ * - If @ctx is not NULL, the base mft record must be mapped on entry
+ * and it will be left mapped on return.
*/
s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, s64 count,
- const BOOL is_rollback)
+ ntfs_attr_search_ctx *ctx, const BOOL is_rollback)
{
s64 delta, to_free, total_freed, real_freed;
ntfs_volume *vol;
total_freed = real_freed = 0;
- rl = ntfs_attr_find_vcn_nolock(ni, start_vcn, TRUE);
+ rl = ntfs_attr_find_vcn_nolock(ni, start_vcn, ctx);
if (IS_ERR(rl)) {
if (!is_rollback)
ntfs_error(vol->sb, "Failed to find first runlist "
/* Attempt to map runlist. */
vcn = rl->vcn;
- rl = ntfs_attr_find_vcn_nolock(ni, vcn, TRUE);
+ rl = ntfs_attr_find_vcn_nolock(ni, vcn, ctx);
if (IS_ERR(rl)) {
err = PTR_ERR(rl);
if (!is_rollback)
* If rollback fails, set the volume errors flag, emit an error
* message, and return the error code.
*/
- delta = __ntfs_cluster_free(ni, start_vcn, total_freed, TRUE);
+ delta = __ntfs_cluster_free(ni, start_vcn, total_freed, ctx, TRUE);
if (delta < 0) {
ntfs_error(vol->sb, "Failed to rollback (error %i). Leaving "
"inconsistent metadata! Unmount and run "
#include <linux/fs.h>
+#include "attrib.h"
#include "types.h"
#include "inode.h"
#include "runlist.h"
extern runlist_element *ntfs_cluster_alloc(ntfs_volume *vol,
const VCN start_vcn, const s64 count, const LCN start_lcn,
- const NTFS_CLUSTER_ALLOCATION_ZONES zone);
+ const NTFS_CLUSTER_ALLOCATION_ZONES zone,
+ const BOOL is_extension);
extern s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn,
- s64 count, const BOOL is_rollback);
+ s64 count, ntfs_attr_search_ctx *ctx, const BOOL is_rollback);
/**
* ntfs_cluster_free - free clusters on an ntfs volume
* @ni: ntfs inode whose runlist describes the clusters to free
* @start_vcn: vcn in the runlist of @ni at which to start freeing clusters
* @count: number of clusters to free or -1 for all clusters
+ * @ctx: active attribute search context if present or NULL if not
*
* Free @count clusters starting at the cluster @start_vcn in the runlist
* described by the ntfs inode @ni.
* deallocated. Thus, to completely free all clusters in a runlist, use
* @start_vcn = 0 and @count = -1.
*
- * Note, ntfs_cluster_free() does not modify the runlist at all, so the caller
- * has to deal with it later.
+ * If @ctx is specified, it is an active search context of @ni and its base mft
+ * record. This is needed when ntfs_cluster_free() encounters unmapped runlist
+ * fragments and allows their mapping. If you do not have the mft record
+ * mapped, you can specify @ctx as NULL and ntfs_cluster_free() will perform
+ * the necessary mapping and unmapping.
+ *
+ * Note, ntfs_cluster_free() saves the state of @ctx on entry and restores it
+ * before returning. Thus, @ctx will be left pointing to the same attribute on
+ * return as on entry. However, the actual pointers in @ctx may point to
+ * different memory locations on return, so you must remember to reset any
+ * cached pointers from the @ctx, i.e. after the call to ntfs_cluster_free(),
+ * you will probably want to do:
+ * m = ctx->mrec;
+ * a = ctx->attr;
+ * Assuming you cache ctx->attr in a variable @a of type ATTR_RECORD * and that
+ * you cache ctx->mrec in a variable @m of type MFT_RECORD *.
+ *
+ * Note, ntfs_cluster_free() does not modify the runlist, so you have to remove
+ * from the runlist or mark sparse the freed runs later.
*
* Return the number of deallocated clusters (not counting sparse ones) on
* success and -errno on error.
*
+ * WARNING: If @ctx is supplied, regardless of whether success or failure is
+ * returned, you need to check IS_ERR(@ctx->mrec) and if TRUE the @ctx
+ * is no longer valid, i.e. you need to either call
+ * ntfs_attr_reinit_search_ctx() or ntfs_attr_put_search_ctx() on it.
+ * In that case PTR_ERR(@ctx->mrec) will give you the error code for
+ * why the mapping of the old inode failed.
+ *
* Locking: - The runlist described by @ni must be locked for writing on entry
* and is locked on return. Note the runlist may be modified when
* needed runlist fragments need to be mapped.
* on return.
* - This function takes the volume lcn bitmap lock for writing and
* modifies the bitmap contents.
+ * - If @ctx is NULL, the base mft record of @ni must not be mapped on
+ * entry and it will be left unmapped on return.
+ * - If @ctx is not NULL, the base mft record must be mapped on entry
+ * and it will be left mapped on return.
*/
static inline s64 ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn,
- s64 count)
+ s64 count, ntfs_attr_search_ctx *ctx)
{
- return __ntfs_cluster_free(ni, start_vcn, count, FALSE);
+ return __ntfs_cluster_free(ni, start_vcn, count, ctx, FALSE);
}
extern int ntfs_cluster_free_from_rl_nolock(ntfs_volume *vol,
* If there was insufficient memory to complete the request, return NULL.
* Depending on @gfp_mask the allocation may be guaranteed to succeed.
*/
-static inline void *__ntfs_malloc(unsigned long size,
- gfp_t gfp_mask)
+static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask)
{
if (likely(size <= PAGE_SIZE)) {
BUG_ON(!size);
ntfs_volume *vol = ni->vol;
struct inode *mft_vi = vol->mft_ino;
struct page *page;
- unsigned long index, ofs, end_index;
+ unsigned long index, end_index;
+ unsigned ofs;
BUG_ON(ni->page);
/*
ll = mftbmp_ni->allocated_size;
read_unlock_irqrestore(&mftbmp_ni->size_lock, flags);
rl = ntfs_attr_find_vcn_nolock(mftbmp_ni,
- (ll - 1) >> vol->cluster_size_bits, TRUE);
+ (ll - 1) >> vol->cluster_size_bits, NULL);
if (unlikely(IS_ERR(rl) || !rl->length || rl->lcn < 0)) {
up_write(&mftbmp_ni->runlist.lock);
ntfs_error(vol->sb, "Failed to determine last allocated "
up_write(&vol->lcnbmp_lock);
ntfs_unmap_page(page);
/* Allocate a cluster from the DATA_ZONE. */
- rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE);
+ rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE,
+ TRUE);
if (IS_ERR(rl2)) {
up_write(&mftbmp_ni->runlist.lock);
ntfs_error(vol->sb, "Failed to allocate a cluster for "
ll = mft_ni->allocated_size;
read_unlock_irqrestore(&mft_ni->size_lock, flags);
rl = ntfs_attr_find_vcn_nolock(mft_ni,
- (ll - 1) >> vol->cluster_size_bits, TRUE);
+ (ll - 1) >> vol->cluster_size_bits, NULL);
if (unlikely(IS_ERR(rl) || !rl->length || rl->lcn < 0)) {
up_write(&mft_ni->runlist.lock);
ntfs_error(vol->sb, "Failed to determine last allocated "
nr > min_nr ? "default" : "minimal", (long long)nr);
old_last_vcn = rl[1].vcn;
do {
- rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE);
+ rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE,
+ TRUE);
if (likely(!IS_ERR(rl2)))
break;
if (PTR_ERR(rl2) != -ENOSPC || nr == min_nr) {
NVolSetErrors(vol);
return ret;
}
- a = ctx->attr;
- a->data.non_resident.highest_vcn = cpu_to_sle64(old_last_vcn - 1);
+ ctx->attr->data.non_resident.highest_vcn =
+ cpu_to_sle64(old_last_vcn - 1);
undo_alloc:
- if (ntfs_cluster_free(mft_ni, old_last_vcn, -1) < 0) {
+ if (ntfs_cluster_free(mft_ni, old_last_vcn, -1, ctx) < 0) {
ntfs_error(vol->sb, "Failed to free clusters from mft data "
"attribute.%s", es);
NVolSetErrors(vol);
}
+ a = ctx->attr;
if (ntfs_rl_truncate_nolock(vol, &mft_ni->runlist, old_last_vcn)) {
ntfs_error(vol->sb, "Failed to truncate mft data attribute "
"runlist.%s", es);
NVolSetErrors(vol);
}
- if (mp_rebuilt) {
+ if (mp_rebuilt && !IS_ERR(ctx->mrec)) {
if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(
a->data.non_resident.mapping_pairs_offset),
old_alen - le16_to_cpu(
}
flush_dcache_mft_record_page(ctx->ntfs_ino);
mark_mft_record_dirty(ctx->ntfs_ino);
+ } else if (IS_ERR(ctx->mrec)) {
+ ntfs_error(vol->sb, "Failed to restore attribute search "
+ "context.%s", es);
+ NVolSetErrors(vol);
}
if (ctx)
ntfs_attr_put_search_ctx(ctx);
if (unlikely(i_size_read(tmp_ino) < sizeof(USN_HEADER))) {
ntfs_error(vol->sb, "Found corrupt $UsnJrnl/$DATA/$Max "
"attribute (size is 0x%llx but should be at "
- "least 0x%x bytes).", i_size_read(tmp_ino),
+ "least 0x%zx bytes).", i_size_read(tmp_ino),
sizeof(USN_HEADER));
return FALSE;
}
extern void disable_timer_nmi_watchdog(void);
extern void enable_timer_nmi_watchdog(void);
extern void nmi_watchdog_tick (struct pt_regs * regs);
-extern int APIC_init(void);
-extern void APIC_late_time_init(void);
+extern int APIC_init_uniprocessor (void);
extern void disable_APIC_timer(void);
extern void enable_APIC_timer(void);
void FASTCALL(send_IPI_self(int vector));
void init_VISWS_APIC_irqs(void);
void setup_IO_APIC(void);
-void IO_APIC_late_time_init(void);
void disable_IO_APIC(void);
void print_IO_APIC(void);
int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
/* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
* which needs to alter them. */
+static inline void smpboot_clear_io_apic_irqs(void)
+{
+ io_apic_irqs = 0;
+}
+
static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
{
CMOS_WRITE(0xa, 0xf);
*((volatile long *) phys_to_virt(0x467)) = 0;
}
+
+static inline void smpboot_setup_io_apic(void)
+{
+ /*
+ * Here we can be sure that there is an IO-APIC in the system. Let's
+ * go and set it up:
+ */
+ if (!skip_ioapic_setup && nr_ioapics)
+ setup_IO_APIC();
+}
/* for visws do nothing for any of these */
+static inline void smpboot_clear_io_apic_irqs(void)
+{
+}
+
static inline void smpboot_restore_warm_reset_vector(void)
{
}
+static inline void smpboot_setup_io_apic(void)
+{
+}
#define __ASM_PPC_SYS_H
#include <linux/init.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/types.h>
#if defined(CONFIG_8260)
extern void put_device(struct device * dev);
-/* drivers/base/platform.c */
-
-struct platform_device {
- const char * name;
- u32 id;
- struct device dev;
- u32 num_resources;
- struct resource * resource;
-};
-
-#define to_platform_device(x) container_of((x), struct platform_device, dev)
-
-extern int platform_device_register(struct platform_device *);
-extern void platform_device_unregister(struct platform_device *);
-
-extern struct bus_type platform_bus_type;
-extern struct device platform_bus;
-
-extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
-extern int platform_get_irq(struct platform_device *, unsigned int);
-extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, char *);
-extern int platform_get_irq_byname(struct platform_device *, char *);
-extern int platform_add_devices(struct platform_device **, int);
-
-extern struct platform_device *platform_device_register_simple(char *, unsigned int, struct resource *, unsigned int);
-
/* drivers/base/power.c */
extern void device_shutdown(void);
--- /dev/null
+/*
+ * platform_device.h - generic, centralized driver model
+ *
+ * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
+ *
+ * This file is released under the GPLv2
+ *
+ * See Documentation/driver-model/ for more information.
+ */
+
+#ifndef _PLATFORM_DEVICE_H_
+#define _PLATFORM_DEVICE_H_
+
+#include <linux/device.h>
+
+struct platform_device {
+ const char * name;
+ u32 id;
+ struct device dev;
+ u32 num_resources;
+ struct resource * resource;
+};
+
+#define to_platform_device(x) container_of((x), struct platform_device, dev)
+
+extern int platform_device_register(struct platform_device *);
+extern void platform_device_unregister(struct platform_device *);
+
+extern struct bus_type platform_bus_type;
+extern struct device platform_bus;
+
+extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
+extern int platform_get_irq(struct platform_device *, unsigned int);
+extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, char *);
+extern int platform_get_irq_byname(struct platform_device *, char *);
+extern int platform_add_devices(struct platform_device **, int);
+
+extern struct platform_device *platform_device_register_simple(char *, unsigned int, struct resource *, unsigned int);
+
+#endif /* _PLATFORM_DEVICE_H_ */
#define _LINUX_SERIAL_8250_H
#include <linux/serial_core.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
/*
* This is the platform device platform_data structure
unsigned char emu10k2_chip; /* Audigy 1 or Audigy 2. */
unsigned char ca0102_chip; /* Audigy 1 or Audigy 2. Not SB Audigy 2 Value. */
unsigned char ca0108_chip; /* Audigy 2 Value */
+ unsigned char ca_cardbus_chip; /* Audigy 2 ZS Notebook */
unsigned char ca0151_chip; /* P16V */
unsigned char spk71; /* Has 7.1 speakers */
unsigned char sblive51; /* SBLive! 5.1 - extout 0x11 -> center, 0x12 -> lfe */
#endif
#endif
+#ifdef CONFIG_X86_LOCAL_APIC
+#include <asm/smp.h>
+#endif
+
/*
* Versions of gcc older than that listed below may actually compile
* and link okay, but the end product can have subtle run time bugs.
#ifndef CONFIG_SMP
+#ifdef CONFIG_X86_LOCAL_APIC
+static void __init smp_init(void)
+{
+ APIC_init_uniprocessor();
+}
+#else
#define smp_init() do { } while (0)
+#endif
static inline void setup_per_cpu_areas(void) { }
static inline void smp_prepare_cpus(unsigned int maxcpus) { }
pagevec_reinit(pvec);
}
+EXPORT_SYMBOL(__pagevec_release);
+
/*
* pagevec_release() for pages which are known to not be on the LRU
*
return pagevec_count(pvec);
}
+EXPORT_SYMBOL(pagevec_lookup_tag);
#ifdef CONFIG_SMP
/*
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/ctype.h>
#include <linux/pci.h>
#include <linux/pm.h>
+#include <linux/platform_device.h>
+
#include <sound/core.h>
#include <sound/control.h>
#include <sound/info.h>
return 0;
}
+static int __devinit snd_emu10k1_cardbus_init(emu10k1_t * emu)
+{
+ unsigned long special_port;
+ unsigned int value;
+
+ /* Special initialisation routine
+ * before the rest of the IO-Ports become active.
+ */
+ special_port = emu->port + 0x38;
+ value = inl(special_port);
+ outl(0x00d00000, special_port);
+ value = inl(special_port);
+ outl(0x00d00001, special_port);
+ value = inl(special_port);
+ outl(0x00d0005f, special_port);
+ value = inl(special_port);
+ outl(0x00d0007f, special_port);
+ value = inl(special_port);
+ outl(0x0090007f, special_port);
+ value = inl(special_port);
+
+ return 0;
+}
+
/*
* Create the EMU10K1 instance
*/
.ca0108_chip = 1,
.spk71 = 1,
.ac97_chip = 1} ,
+ /* Audigy 2 ZS Notebook Cardbus card.*/
+ /* Tested by James@superbug.co.uk 30th October 2005 */
+ /* Not working yet, but progressing. */
+ {.vendor = 0x1102, .device = 0x0008, .subsystem = 0x20011102,
+ .driver = "Audigy2", .name = "Audigy 2 ZS Notebook [SB0530]",
+ .id = "Audigy2",
+ .emu10k2_chip = 1,
+ .ca0108_chip = 1,
+ .ca_cardbus_chip = 1,
+ .spk71 = 1} ,
{.vendor = 0x1102, .device = 0x0008,
.driver = "Audigy2", .name = "Audigy 2 Value [Unknown]",
.id = "Audigy2",
snd_emu10k1_free(emu);
return err;
}
+ } else if (emu->card_capabilities->ca_cardbus_chip) {
+ if ((err = snd_emu10k1_cardbus_init(emu)) < 0) {
+ snd_emu10k1_free(emu);
+ return err;
+ }
} else {
/* 5.1: Enable the additional AC97 Slots. If the emu10k1 version
does not support this, it shouldn't do any harm */
projects / firefly-linux-kernel-4.4.55.git / commitdiff