1 /*****************************************************************************/
4 * devio.c -- User space communication with USB devices.
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * This file implements the usbfs/x/y files, where
23 * x is the bus number and y the device number.
25 * It allows user space programs/"drivers" to communicate directly
26 * with USB devices without intervening kernel driver.
29 * 22.12.1999 0.1 Initial release (split from proc_usb.c)
30 * 04.01.2000 0.2 Turned into its own filesystem
31 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
35 /*****************************************************************************/
39 #include <linux/slab.h>
40 #include <linux/signal.h>
41 #include <linux/poll.h>
42 #include <linux/module.h>
43 #include <linux/usb.h>
44 #include <linux/usbdevice_fs.h>
45 #include <linux/usb/hcd.h> /* for usbcore internals */
46 #include <linux/cdev.h>
47 #include <linux/notifier.h>
48 #include <linux/security.h>
49 #include <linux/user_namespace.h>
50 #include <asm/uaccess.h>
51 #include <asm/byteorder.h>
52 #include <linux/moduleparam.h>
57 #define USB_DEVICE_MAX USB_MAXBUS * 128
59 /* Mutual exclusion for removal, open, and release */
60 DEFINE_MUTEX(usbfs_mutex);
63 struct list_head list; /* state list */
64 struct usb_device *dev;
66 spinlock_t lock; /* protects the async urb lists */
67 struct list_head async_pending;
68 struct list_head async_completed;
69 wait_queue_head_t wait; /* wake up if a request completed */
70 unsigned int discsignr;
72 const struct cred *cred;
73 void __user *disccontext;
74 unsigned long ifclaimed;
76 u32 disabled_bulk_eps;
80 struct list_head asynclist;
83 const struct cred *cred;
86 void __user *userbuffer;
95 static int usbfs_snoop;
96 module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
97 MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
99 #define snoop(dev, format, arg...) \
102 dev_info(dev , format , ## arg); \
109 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
111 #define MAX_USBFS_BUFFER_SIZE 16384
114 static int connected(struct dev_state *ps)
116 return (!list_empty(&ps->list) &&
117 ps->dev->state != USB_STATE_NOTATTACHED);
120 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
124 mutex_lock(&file->f_dentry->d_inode->i_mutex);
128 file->f_pos = offset;
132 file->f_pos += offset;
140 mutex_unlock(&file->f_dentry->d_inode->i_mutex);
144 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
147 struct dev_state *ps = file->private_data;
148 struct usb_device *dev = ps->dev;
155 usb_lock_device(dev);
156 if (!connected(ps)) {
159 } else if (pos < 0) {
164 if (pos < sizeof(struct usb_device_descriptor)) {
165 /* 18 bytes - fits on the stack */
166 struct usb_device_descriptor temp_desc;
168 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
169 le16_to_cpus(&temp_desc.bcdUSB);
170 le16_to_cpus(&temp_desc.idVendor);
171 le16_to_cpus(&temp_desc.idProduct);
172 le16_to_cpus(&temp_desc.bcdDevice);
174 len = sizeof(struct usb_device_descriptor) - pos;
177 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
188 pos = sizeof(struct usb_device_descriptor);
189 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
190 struct usb_config_descriptor *config =
191 (struct usb_config_descriptor *)dev->rawdescriptors[i];
192 unsigned int length = le16_to_cpu(config->wTotalLength);
194 if (*ppos < pos + length) {
196 /* The descriptor may claim to be longer than it
197 * really is. Here is the actual allocated length. */
199 le16_to_cpu(dev->config[i].desc.wTotalLength);
201 len = length - (*ppos - pos);
205 /* Simply don't write (skip over) unallocated parts */
206 if (alloclen > (*ppos - pos)) {
207 alloclen -= (*ppos - pos);
208 if (copy_to_user(buf,
209 dev->rawdescriptors[i] + (*ppos - pos),
210 min(len, alloclen))) {
226 usb_unlock_device(dev);
231 * async list handling
234 static struct async *alloc_async(unsigned int numisoframes)
238 as = kzalloc(sizeof(struct async), GFP_KERNEL);
241 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
249 static void free_async(struct async *as)
253 kfree(as->urb->transfer_buffer);
254 kfree(as->urb->setup_packet);
255 usb_free_urb(as->urb);
259 static void async_newpending(struct async *as)
261 struct dev_state *ps = as->ps;
264 spin_lock_irqsave(&ps->lock, flags);
265 list_add_tail(&as->asynclist, &ps->async_pending);
266 spin_unlock_irqrestore(&ps->lock, flags);
269 static void async_removepending(struct async *as)
271 struct dev_state *ps = as->ps;
274 spin_lock_irqsave(&ps->lock, flags);
275 list_del_init(&as->asynclist);
276 spin_unlock_irqrestore(&ps->lock, flags);
279 static struct async *async_getcompleted(struct dev_state *ps)
282 struct async *as = NULL;
284 spin_lock_irqsave(&ps->lock, flags);
285 if (!list_empty(&ps->async_completed)) {
286 as = list_entry(ps->async_completed.next, struct async,
288 list_del_init(&as->asynclist);
290 spin_unlock_irqrestore(&ps->lock, flags);
294 static struct async *async_getpending(struct dev_state *ps,
295 void __user *userurb)
300 spin_lock_irqsave(&ps->lock, flags);
301 list_for_each_entry(as, &ps->async_pending, asynclist)
302 if (as->userurb == userurb) {
303 list_del_init(&as->asynclist);
304 spin_unlock_irqrestore(&ps->lock, flags);
307 spin_unlock_irqrestore(&ps->lock, flags);
311 static void snoop_urb(struct usb_device *udev,
312 void __user *userurb, int pipe, unsigned length,
313 int timeout_or_status, enum snoop_when when,
314 unsigned char *data, unsigned data_len)
316 static const char *types[] = {"isoc", "int", "ctrl", "bulk"};
317 static const char *dirs[] = {"out", "in"};
324 ep = usb_pipeendpoint(pipe);
325 t = types[usb_pipetype(pipe)];
326 d = dirs[!!usb_pipein(pipe)];
328 if (userurb) { /* Async */
330 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
332 userurb, ep, t, d, length);
334 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
335 "actual_length %u status %d\n",
336 userurb, ep, t, d, length,
340 dev_info(&udev->dev, "ep%d %s-%s, length %u, "
342 ep, t, d, length, timeout_or_status);
344 dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, "
346 ep, t, d, length, timeout_or_status);
349 if (data && data_len > 0) {
350 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
355 #define AS_CONTINUATION 1
358 static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr)
364 /* Mark all the pending URBs that match bulk_addr, up to but not
365 * including the first one without AS_CONTINUATION. If such an
366 * URB is encountered then a new transfer has already started so
367 * the endpoint doesn't need to be disabled; otherwise it does.
369 list_for_each_entry(as, &ps->async_pending, asynclist) {
370 if (as->bulk_addr == bulk_addr) {
371 if (as->bulk_status != AS_CONTINUATION)
373 as->bulk_status = AS_UNLINK;
377 ps->disabled_bulk_eps |= (1 << bulk_addr);
379 /* Now carefully unlink all the marked pending URBs */
381 list_for_each_entry(as, &ps->async_pending, asynclist) {
382 if (as->bulk_status == AS_UNLINK) {
383 as->bulk_status = 0; /* Only once */
384 spin_unlock(&ps->lock); /* Allow completions */
385 usb_unlink_urb(as->urb);
386 spin_lock(&ps->lock);
392 static void async_completed(struct urb *urb)
394 struct async *as = urb->context;
395 struct dev_state *ps = as->ps;
396 struct siginfo sinfo;
397 struct pid *pid = NULL;
399 const struct cred *cred = NULL;
402 spin_lock(&ps->lock);
403 list_move_tail(&as->asynclist, &ps->async_completed);
404 as->status = urb->status;
407 sinfo.si_signo = as->signr;
408 sinfo.si_errno = as->status;
409 sinfo.si_code = SI_ASYNCIO;
410 sinfo.si_addr = as->userurb;
411 pid = get_pid(as->pid);
412 cred = get_cred(as->cred);
415 snoop(&urb->dev->dev, "urb complete\n");
416 snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
417 as->status, COMPLETE,
418 ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ?
419 NULL : urb->transfer_buffer, urb->actual_length);
420 if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
421 as->status != -ENOENT)
422 cancel_bulk_urbs(ps, as->bulk_addr);
423 spin_unlock(&ps->lock);
426 kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid);
434 static void destroy_async(struct dev_state *ps, struct list_head *list)
439 spin_lock_irqsave(&ps->lock, flags);
440 while (!list_empty(list)) {
441 as = list_entry(list->next, struct async, asynclist);
442 list_del_init(&as->asynclist);
444 /* drop the spinlock so the completion handler can run */
445 spin_unlock_irqrestore(&ps->lock, flags);
446 usb_kill_urb(as->urb);
447 spin_lock_irqsave(&ps->lock, flags);
449 spin_unlock_irqrestore(&ps->lock, flags);
452 static void destroy_async_on_interface(struct dev_state *ps,
455 struct list_head *p, *q, hitlist;
458 INIT_LIST_HEAD(&hitlist);
459 spin_lock_irqsave(&ps->lock, flags);
460 list_for_each_safe(p, q, &ps->async_pending)
461 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
462 list_move_tail(p, &hitlist);
463 spin_unlock_irqrestore(&ps->lock, flags);
464 destroy_async(ps, &hitlist);
467 static void destroy_all_async(struct dev_state *ps)
469 destroy_async(ps, &ps->async_pending);
473 * interface claims are made only at the request of user level code,
474 * which can also release them (explicitly or by closing files).
475 * they're also undone when devices disconnect.
478 static int driver_probe(struct usb_interface *intf,
479 const struct usb_device_id *id)
484 static void driver_disconnect(struct usb_interface *intf)
486 struct dev_state *ps = usb_get_intfdata(intf);
487 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
492 /* NOTE: this relies on usbcore having canceled and completed
493 * all pending I/O requests; 2.6 does that.
496 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
497 clear_bit(ifnum, &ps->ifclaimed);
499 dev_warn(&intf->dev, "interface number %u out of range\n",
502 usb_set_intfdata(intf, NULL);
504 /* force async requests to complete */
505 destroy_async_on_interface(ps, ifnum);
508 /* The following routines are merely placeholders. There is no way
509 * to inform a user task about suspend or resumes.
511 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
516 static int driver_resume(struct usb_interface *intf)
521 struct usb_driver usbfs_driver = {
523 .probe = driver_probe,
524 .disconnect = driver_disconnect,
525 .suspend = driver_suspend,
526 .resume = driver_resume,
529 static int claimintf(struct dev_state *ps, unsigned int ifnum)
531 struct usb_device *dev = ps->dev;
532 struct usb_interface *intf;
535 if (ifnum >= 8*sizeof(ps->ifclaimed))
537 /* already claimed */
538 if (test_bit(ifnum, &ps->ifclaimed))
541 intf = usb_ifnum_to_if(dev, ifnum);
545 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
547 set_bit(ifnum, &ps->ifclaimed);
551 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
553 struct usb_device *dev;
554 struct usb_interface *intf;
558 if (ifnum >= 8*sizeof(ps->ifclaimed))
561 intf = usb_ifnum_to_if(dev, ifnum);
564 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
565 usb_driver_release_interface(&usbfs_driver, intf);
571 static int checkintf(struct dev_state *ps, unsigned int ifnum)
573 if (ps->dev->state != USB_STATE_CONFIGURED)
574 return -EHOSTUNREACH;
575 if (ifnum >= 8*sizeof(ps->ifclaimed))
577 if (test_bit(ifnum, &ps->ifclaimed))
579 /* if not yet claimed, claim it for the driver */
580 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
581 "interface %u before use\n", task_pid_nr(current),
582 current->comm, ifnum);
583 return claimintf(ps, ifnum);
586 static int findintfep(struct usb_device *dev, unsigned int ep)
588 unsigned int i, j, e;
589 struct usb_interface *intf;
590 struct usb_host_interface *alts;
591 struct usb_endpoint_descriptor *endpt;
593 if (ep & ~(USB_DIR_IN|0xf))
597 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
598 intf = dev->actconfig->interface[i];
599 for (j = 0; j < intf->num_altsetting; j++) {
600 alts = &intf->altsetting[j];
601 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
602 endpt = &alts->endpoint[e].desc;
603 if (endpt->bEndpointAddress == ep)
604 return alts->desc.bInterfaceNumber;
611 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
612 unsigned int request, unsigned int index)
615 struct usb_host_interface *alt_setting;
617 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
618 && ps->dev->state != USB_STATE_ADDRESS
619 && ps->dev->state != USB_STATE_CONFIGURED)
620 return -EHOSTUNREACH;
621 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
625 * check for the special corner case 'get_device_id' in the printer
626 * class specification, where wIndex is (interface << 8 | altsetting)
627 * instead of just interface
629 if (requesttype == 0xa1 && request == 0) {
630 alt_setting = usb_find_alt_setting(ps->dev->actconfig,
631 index >> 8, index & 0xff);
633 && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
638 switch (requesttype & USB_RECIP_MASK) {
639 case USB_RECIP_ENDPOINT:
640 ret = findintfep(ps->dev, index);
642 ret = checkintf(ps, ret);
645 case USB_RECIP_INTERFACE:
646 ret = checkintf(ps, index);
652 static int match_devt(struct device *dev, void *data)
654 return dev->devt == (dev_t) (unsigned long) data;
657 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
661 dev = bus_find_device(&usb_bus_type, NULL,
662 (void *) (unsigned long) devt, match_devt);
665 return container_of(dev, struct usb_device, dev);
671 static int usbdev_open(struct inode *inode, struct file *file)
673 struct usb_device *dev = NULL;
674 struct dev_state *ps;
678 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
684 /* Protect against simultaneous removal or release */
685 mutex_lock(&usbfs_mutex);
687 /* usbdev device-node */
688 if (imajor(inode) == USB_DEVICE_MAJOR)
689 dev = usbdev_lookup_by_devt(inode->i_rdev);
691 #ifdef CONFIG_USB_DEVICEFS
694 dev = inode->i_private;
695 if (dev && dev->usbfs_dentry &&
696 dev->usbfs_dentry->d_inode == inode)
702 mutex_unlock(&usbfs_mutex);
707 usb_lock_device(dev);
708 if (dev->state == USB_STATE_NOTATTACHED)
709 goto out_unlock_device;
711 ret = usb_autoresume_device(dev);
713 goto out_unlock_device;
717 spin_lock_init(&ps->lock);
718 INIT_LIST_HEAD(&ps->list);
719 INIT_LIST_HEAD(&ps->async_pending);
720 INIT_LIST_HEAD(&ps->async_completed);
721 init_waitqueue_head(&ps->wait);
723 ps->disc_pid = get_pid(task_pid(current));
724 ps->cred = get_current_cred();
725 ps->disccontext = NULL;
727 security_task_getsecid(current, &ps->secid);
729 list_add_tail(&ps->list, &dev->filelist);
730 file->private_data = ps;
731 usb_unlock_device(dev);
732 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
737 usb_unlock_device(dev);
744 static int usbdev_release(struct inode *inode, struct file *file)
746 struct dev_state *ps = file->private_data;
747 struct usb_device *dev = ps->dev;
751 usb_lock_device(dev);
752 usb_hub_release_all_ports(dev, ps);
754 list_del_init(&ps->list);
756 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
758 if (test_bit(ifnum, &ps->ifclaimed))
759 releaseintf(ps, ifnum);
761 destroy_all_async(ps);
762 usb_autosuspend_device(dev);
763 usb_unlock_device(dev);
765 put_pid(ps->disc_pid);
768 as = async_getcompleted(ps);
771 as = async_getcompleted(ps);
777 static int proc_control(struct dev_state *ps, void __user *arg)
779 struct usb_device *dev = ps->dev;
780 struct usbdevfs_ctrltransfer ctrl;
786 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
788 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
792 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
793 if (wLength > PAGE_SIZE)
795 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
799 snoop(&dev->dev, "control urb: bRequestType=%02x "
800 "bRequest=%02x wValue=%04x "
801 "wIndex=%04x wLength=%04x\n",
802 ctrl.bRequestType, ctrl.bRequest,
803 __le16_to_cpup(&ctrl.wValue),
804 __le16_to_cpup(&ctrl.wIndex),
805 __le16_to_cpup(&ctrl.wLength));
806 if (ctrl.bRequestType & 0x80) {
807 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
809 free_page((unsigned long)tbuf);
812 pipe = usb_rcvctrlpipe(dev, 0);
813 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
815 usb_unlock_device(dev);
816 i = usb_control_msg(dev, pipe, ctrl.bRequest,
817 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
818 tbuf, ctrl.wLength, tmo);
819 usb_lock_device(dev);
820 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
822 if ((i > 0) && ctrl.wLength) {
823 if (copy_to_user(ctrl.data, tbuf, i)) {
824 free_page((unsigned long)tbuf);
830 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
831 free_page((unsigned long)tbuf);
835 pipe = usb_sndctrlpipe(dev, 0);
836 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
839 usb_unlock_device(dev);
840 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
841 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
842 tbuf, ctrl.wLength, tmo);
843 usb_lock_device(dev);
844 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
846 free_page((unsigned long)tbuf);
847 if (i < 0 && i != -EPIPE) {
848 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
849 "failed cmd %s rqt %u rq %u len %u ret %d\n",
850 current->comm, ctrl.bRequestType, ctrl.bRequest,
856 static int proc_bulk(struct dev_state *ps, void __user *arg)
858 struct usb_device *dev = ps->dev;
859 struct usbdevfs_bulktransfer bulk;
860 unsigned int tmo, len1, pipe;
865 if (copy_from_user(&bulk, arg, sizeof(bulk)))
867 ret = findintfep(ps->dev, bulk.ep);
870 ret = checkintf(ps, ret);
873 if (bulk.ep & USB_DIR_IN)
874 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
876 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
877 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
880 if (len1 > MAX_USBFS_BUFFER_SIZE)
882 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
885 if (bulk.ep & 0x80) {
886 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
890 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
892 usb_unlock_device(dev);
893 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
894 usb_lock_device(dev);
895 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
898 if (copy_to_user(bulk.data, tbuf, len2)) {
905 if (copy_from_user(tbuf, bulk.data, len1)) {
910 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
912 usb_unlock_device(dev);
913 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
914 usb_lock_device(dev);
915 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
923 static int proc_resetep(struct dev_state *ps, void __user *arg)
928 if (get_user(ep, (unsigned int __user *)arg))
930 ret = findintfep(ps->dev, ep);
933 ret = checkintf(ps, ret);
936 usb_reset_endpoint(ps->dev, ep);
940 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
946 if (get_user(ep, (unsigned int __user *)arg))
948 ret = findintfep(ps->dev, ep);
951 ret = checkintf(ps, ret);
955 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
957 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
959 return usb_clear_halt(ps->dev, pipe);
962 static int proc_getdriver(struct dev_state *ps, void __user *arg)
964 struct usbdevfs_getdriver gd;
965 struct usb_interface *intf;
968 if (copy_from_user(&gd, arg, sizeof(gd)))
970 intf = usb_ifnum_to_if(ps->dev, gd.interface);
971 if (!intf || !intf->dev.driver)
974 strncpy(gd.driver, intf->dev.driver->name,
976 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
981 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
983 struct usbdevfs_connectinfo ci = {
984 .devnum = ps->dev->devnum,
985 .slow = ps->dev->speed == USB_SPEED_LOW
988 if (copy_to_user(arg, &ci, sizeof(ci)))
993 static int proc_resetdevice(struct dev_state *ps)
995 return usb_reset_device(ps->dev);
998 static int proc_setintf(struct dev_state *ps, void __user *arg)
1000 struct usbdevfs_setinterface setintf;
1003 if (copy_from_user(&setintf, arg, sizeof(setintf)))
1005 if ((ret = checkintf(ps, setintf.interface)))
1007 return usb_set_interface(ps->dev, setintf.interface,
1008 setintf.altsetting);
1011 static int proc_setconfig(struct dev_state *ps, void __user *arg)
1015 struct usb_host_config *actconfig;
1017 if (get_user(u, (int __user *)arg))
1020 actconfig = ps->dev->actconfig;
1022 /* Don't touch the device if any interfaces are claimed.
1023 * It could interfere with other drivers' operations, and if
1024 * an interface is claimed by usbfs it could easily deadlock.
1029 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1030 if (usb_interface_claimed(actconfig->interface[i])) {
1031 dev_warn(&ps->dev->dev,
1032 "usbfs: interface %d claimed by %s "
1033 "while '%s' sets config #%d\n",
1034 actconfig->interface[i]
1036 ->desc.bInterfaceNumber,
1037 actconfig->interface[i]
1046 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1047 * so avoid usb_set_configuration()'s kick to sysfs
1050 if (actconfig && actconfig->desc.bConfigurationValue == u)
1051 status = usb_reset_configuration(ps->dev);
1053 status = usb_set_configuration(ps->dev, u);
1059 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
1060 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1063 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1064 struct usb_host_endpoint *ep;
1066 struct usb_ctrlrequest *dr = NULL;
1067 unsigned int u, totlen, isofrmlen;
1068 int ret, ifnum = -1;
1071 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
1072 USBDEVFS_URB_SHORT_NOT_OK |
1073 USBDEVFS_URB_BULK_CONTINUATION |
1074 USBDEVFS_URB_NO_FSBR |
1075 USBDEVFS_URB_ZERO_PACKET |
1076 USBDEVFS_URB_NO_INTERRUPT))
1078 if (uurb->buffer_length > 0 && !uurb->buffer)
1080 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1081 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1082 ifnum = findintfep(ps->dev, uurb->endpoint);
1085 ret = checkintf(ps, ifnum);
1089 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
1091 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1094 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1098 switch(uurb->type) {
1099 case USBDEVFS_URB_TYPE_CONTROL:
1100 if (!usb_endpoint_xfer_control(&ep->desc))
1102 /* min 8 byte setup packet,
1103 * max 8 byte setup plus an arbitrary data stage */
1104 if (uurb->buffer_length < 8 ||
1105 uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
1107 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1110 if (copy_from_user(dr, uurb->buffer, 8)) {
1114 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1118 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
1119 le16_to_cpup(&dr->wIndex));
1124 uurb->number_of_packets = 0;
1125 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1127 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1129 uurb->endpoint |= USB_DIR_IN;
1132 uurb->endpoint &= ~USB_DIR_IN;
1134 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1135 "bRequest=%02x wValue=%04x "
1136 "wIndex=%04x wLength=%04x\n",
1137 dr->bRequestType, dr->bRequest,
1138 __le16_to_cpup(&dr->wValue),
1139 __le16_to_cpup(&dr->wIndex),
1140 __le16_to_cpup(&dr->wLength));
1143 case USBDEVFS_URB_TYPE_BULK:
1144 switch (usb_endpoint_type(&ep->desc)) {
1145 case USB_ENDPOINT_XFER_CONTROL:
1146 case USB_ENDPOINT_XFER_ISOC:
1148 case USB_ENDPOINT_XFER_INT:
1149 /* allow single-shot interrupt transfers */
1150 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1153 uurb->number_of_packets = 0;
1154 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1158 case USBDEVFS_URB_TYPE_INTERRUPT:
1159 if (!usb_endpoint_xfer_int(&ep->desc))
1162 uurb->number_of_packets = 0;
1163 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1167 case USBDEVFS_URB_TYPE_ISO:
1168 /* arbitrary limit */
1169 if (uurb->number_of_packets < 1 ||
1170 uurb->number_of_packets > 128)
1172 if (!usb_endpoint_xfer_isoc(&ep->desc))
1174 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1175 uurb->number_of_packets;
1176 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1178 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1182 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1184 * sufficient for USB 2.0 high-bandwidth iso */
1185 if (isopkt[u].length > 8192) {
1189 totlen += isopkt[u].length;
1191 /* 3072 * 64 microframes */
1192 if (totlen > 196608) {
1196 uurb->buffer_length = totlen;
1202 if (uurb->buffer_length > 0 &&
1203 !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1204 uurb->buffer, uurb->buffer_length)) {
1209 as = alloc_async(uurb->number_of_packets);
1215 if (uurb->buffer_length > 0) {
1216 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1218 if (!as->urb->transfer_buffer) {
1224 /* Isochronous input data may end up being discontiguous
1225 * if some of the packets are short. Clear the buffer so
1226 * that the gaps don't leak kernel data to userspace.
1228 if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO)
1229 memset(as->urb->transfer_buffer, 0,
1230 uurb->buffer_length);
1232 as->urb->dev = ps->dev;
1233 as->urb->pipe = (uurb->type << 30) |
1234 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1235 (uurb->endpoint & USB_DIR_IN);
1237 /* This tedious sequence is necessary because the URB_* flags
1238 * are internal to the kernel and subject to change, whereas
1239 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1241 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1242 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1244 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1245 u |= URB_SHORT_NOT_OK;
1246 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1248 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1249 u |= URB_ZERO_PACKET;
1250 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1251 u |= URB_NO_INTERRUPT;
1252 as->urb->transfer_flags = u;
1254 as->urb->transfer_buffer_length = uurb->buffer_length;
1255 as->urb->setup_packet = (unsigned char *)dr;
1256 as->urb->start_frame = uurb->start_frame;
1257 as->urb->number_of_packets = uurb->number_of_packets;
1258 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1259 ps->dev->speed == USB_SPEED_HIGH)
1260 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1262 as->urb->interval = ep->desc.bInterval;
1263 as->urb->context = as;
1264 as->urb->complete = async_completed;
1265 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1266 as->urb->iso_frame_desc[u].offset = totlen;
1267 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1268 totlen += isopkt[u].length;
1273 if (is_in && uurb->buffer_length > 0)
1274 as->userbuffer = uurb->buffer;
1276 as->userbuffer = NULL;
1277 as->signr = uurb->signr;
1279 as->pid = get_pid(task_pid(current));
1280 as->cred = get_current_cred();
1281 security_task_getsecid(current, &as->secid);
1282 if (!is_in && uurb->buffer_length > 0) {
1283 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1284 uurb->buffer_length)) {
1289 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1290 as->urb->transfer_buffer_length, 0, SUBMIT,
1291 is_in ? NULL : as->urb->transfer_buffer,
1292 uurb->buffer_length);
1293 async_newpending(as);
1295 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1296 spin_lock_irq(&ps->lock);
1298 /* Not exactly the endpoint address; the direction bit is
1299 * shifted to the 0x10 position so that the value will be
1302 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1303 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1306 /* If this bulk URB is the start of a new transfer, re-enable
1307 * the endpoint. Otherwise mark it as a continuation URB.
1309 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1310 as->bulk_status = AS_CONTINUATION;
1312 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1314 /* Don't accept continuation URBs if the endpoint is
1315 * disabled because of an earlier error.
1317 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1320 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1321 spin_unlock_irq(&ps->lock);
1323 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1327 dev_printk(KERN_DEBUG, &ps->dev->dev,
1328 "usbfs: usb_submit_urb returned %d\n", ret);
1329 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1330 0, ret, COMPLETE, NULL, 0);
1331 async_removepending(as);
1338 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1340 struct usbdevfs_urb uurb;
1342 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1345 return proc_do_submiturb(ps, &uurb,
1346 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1350 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1354 as = async_getpending(ps, arg);
1357 usb_kill_urb(as->urb);
1361 static int processcompl(struct async *as, void __user * __user *arg)
1363 struct urb *urb = as->urb;
1364 struct usbdevfs_urb __user *userurb = as->userurb;
1365 void __user *addr = as->userurb;
1368 if (as->userbuffer && urb->actual_length) {
1369 if (urb->number_of_packets > 0) /* Isochronous */
1370 i = urb->transfer_buffer_length;
1372 i = urb->actual_length;
1373 if (copy_to_user(as->userbuffer, urb->transfer_buffer, i))
1376 if (put_user(as->status, &userurb->status))
1378 if (put_user(urb->actual_length, &userurb->actual_length))
1380 if (put_user(urb->error_count, &userurb->error_count))
1383 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1384 for (i = 0; i < urb->number_of_packets; i++) {
1385 if (put_user(urb->iso_frame_desc[i].actual_length,
1386 &userurb->iso_frame_desc[i].actual_length))
1388 if (put_user(urb->iso_frame_desc[i].status,
1389 &userurb->iso_frame_desc[i].status))
1394 if (put_user(addr, (void __user * __user *)arg))
1402 static struct async *reap_as(struct dev_state *ps)
1404 DECLARE_WAITQUEUE(wait, current);
1405 struct async *as = NULL;
1406 struct usb_device *dev = ps->dev;
1408 add_wait_queue(&ps->wait, &wait);
1410 __set_current_state(TASK_INTERRUPTIBLE);
1411 as = async_getcompleted(ps);
1414 if (signal_pending(current))
1416 usb_unlock_device(dev);
1418 usb_lock_device(dev);
1420 remove_wait_queue(&ps->wait, &wait);
1421 set_current_state(TASK_RUNNING);
1425 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1427 struct async *as = reap_as(ps);
1429 int retval = processcompl(as, (void __user * __user *)arg);
1433 if (signal_pending(current))
1438 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1443 as = async_getcompleted(ps);
1446 retval = processcompl(as, (void __user * __user *)arg);
1452 #ifdef CONFIG_COMPAT
1453 static int proc_control_compat(struct dev_state *ps,
1454 struct usbdevfs_ctrltransfer32 __user *p32)
1456 struct usbdevfs_ctrltransfer __user *p;
1458 p = compat_alloc_user_space(sizeof(*p));
1459 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1460 get_user(udata, &p32->data) ||
1461 put_user(compat_ptr(udata), &p->data))
1463 return proc_control(ps, p);
1466 static int proc_bulk_compat(struct dev_state *ps,
1467 struct usbdevfs_bulktransfer32 __user *p32)
1469 struct usbdevfs_bulktransfer __user *p;
1471 compat_caddr_t addr;
1473 p = compat_alloc_user_space(sizeof(*p));
1475 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1476 get_user(n, &p32->len) || put_user(n, &p->len) ||
1477 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1478 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1481 return proc_bulk(ps, p);
1483 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1485 struct usbdevfs_disconnectsignal32 ds;
1487 if (copy_from_user(&ds, arg, sizeof(ds)))
1489 ps->discsignr = ds.signr;
1490 ps->disccontext = compat_ptr(ds.context);
1494 static int get_urb32(struct usbdevfs_urb *kurb,
1495 struct usbdevfs_urb32 __user *uurb)
1498 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1499 __get_user(kurb->type, &uurb->type) ||
1500 __get_user(kurb->endpoint, &uurb->endpoint) ||
1501 __get_user(kurb->status, &uurb->status) ||
1502 __get_user(kurb->flags, &uurb->flags) ||
1503 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1504 __get_user(kurb->actual_length, &uurb->actual_length) ||
1505 __get_user(kurb->start_frame, &uurb->start_frame) ||
1506 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1507 __get_user(kurb->error_count, &uurb->error_count) ||
1508 __get_user(kurb->signr, &uurb->signr))
1511 if (__get_user(uptr, &uurb->buffer))
1513 kurb->buffer = compat_ptr(uptr);
1514 if (__get_user(uptr, &uurb->usercontext))
1516 kurb->usercontext = compat_ptr(uptr);
1521 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1523 struct usbdevfs_urb uurb;
1525 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1528 return proc_do_submiturb(ps, &uurb,
1529 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1533 static int processcompl_compat(struct async *as, void __user * __user *arg)
1535 struct urb *urb = as->urb;
1536 struct usbdevfs_urb32 __user *userurb = as->userurb;
1537 void __user *addr = as->userurb;
1540 if (as->userbuffer && urb->actual_length)
1541 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1542 urb->actual_length))
1544 if (put_user(as->status, &userurb->status))
1546 if (put_user(urb->actual_length, &userurb->actual_length))
1548 if (put_user(urb->error_count, &userurb->error_count))
1551 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1552 for (i = 0; i < urb->number_of_packets; i++) {
1553 if (put_user(urb->iso_frame_desc[i].actual_length,
1554 &userurb->iso_frame_desc[i].actual_length))
1556 if (put_user(urb->iso_frame_desc[i].status,
1557 &userurb->iso_frame_desc[i].status))
1562 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1567 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1569 struct async *as = reap_as(ps);
1571 int retval = processcompl_compat(as, (void __user * __user *)arg);
1575 if (signal_pending(current))
1580 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1586 as = async_getcompleted(ps);
1588 retval = processcompl_compat(as, (void __user * __user *)arg);
1597 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1599 struct usbdevfs_disconnectsignal ds;
1601 if (copy_from_user(&ds, arg, sizeof(ds)))
1603 ps->discsignr = ds.signr;
1604 ps->disccontext = ds.context;
1608 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1612 if (get_user(ifnum, (unsigned int __user *)arg))
1614 return claimintf(ps, ifnum);
1617 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1622 if (get_user(ifnum, (unsigned int __user *)arg))
1624 if ((ret = releaseintf(ps, ifnum)) < 0)
1626 destroy_async_on_interface (ps, ifnum);
1630 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1635 struct usb_interface *intf = NULL;
1636 struct usb_driver *driver = NULL;
1639 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1640 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1642 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1643 if (copy_from_user(buf, ctl->data, size)) {
1648 memset(buf, 0, size);
1652 if (!connected(ps)) {
1657 if (ps->dev->state != USB_STATE_CONFIGURED)
1658 retval = -EHOSTUNREACH;
1659 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1661 else switch (ctl->ioctl_code) {
1663 /* disconnect kernel driver from interface */
1664 case USBDEVFS_DISCONNECT:
1665 if (intf->dev.driver) {
1666 driver = to_usb_driver(intf->dev.driver);
1667 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1668 usb_driver_release_interface(driver, intf);
1673 /* let kernel drivers try to (re)bind to the interface */
1674 case USBDEVFS_CONNECT:
1675 if (!intf->dev.driver)
1676 retval = device_attach(&intf->dev);
1681 /* talk directly to the interface's driver */
1683 if (intf->dev.driver)
1684 driver = to_usb_driver(intf->dev.driver);
1685 if (driver == NULL || driver->unlocked_ioctl == NULL) {
1688 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
1689 if (retval == -ENOIOCTLCMD)
1694 /* cleanup and return */
1696 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1698 && copy_to_user(ctl->data, buf, size) != 0)
1705 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1707 struct usbdevfs_ioctl ctrl;
1709 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1711 return proc_ioctl(ps, &ctrl);
1714 #ifdef CONFIG_COMPAT
1715 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1717 struct usbdevfs_ioctl32 __user *uioc;
1718 struct usbdevfs_ioctl ctrl;
1721 uioc = compat_ptr((long)arg);
1722 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1723 __get_user(ctrl.ifno, &uioc->ifno) ||
1724 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1725 __get_user(udata, &uioc->data))
1727 ctrl.data = compat_ptr(udata);
1729 return proc_ioctl(ps, &ctrl);
1733 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1738 if (get_user(portnum, (unsigned __user *) arg))
1740 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1742 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1743 portnum, task_pid_nr(current), current->comm);
1747 static int proc_release_port(struct dev_state *ps, void __user *arg)
1751 if (get_user(portnum, (unsigned __user *) arg))
1753 return usb_hub_release_port(ps->dev, portnum, ps);
1757 * NOTE: All requests here that have interface numbers as parameters
1758 * are assuming that somehow the configuration has been prevented from
1759 * changing. But there's no mechanism to ensure that...
1761 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1764 struct dev_state *ps = file->private_data;
1765 struct inode *inode = file->f_path.dentry->d_inode;
1766 struct usb_device *dev = ps->dev;
1769 if (!(file->f_mode & FMODE_WRITE))
1772 usb_lock_device(dev);
1773 if (!connected(ps)) {
1774 usb_unlock_device(dev);
1779 case USBDEVFS_CONTROL:
1780 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1781 ret = proc_control(ps, p);
1783 inode->i_mtime = CURRENT_TIME;
1787 snoop(&dev->dev, "%s: BULK\n", __func__);
1788 ret = proc_bulk(ps, p);
1790 inode->i_mtime = CURRENT_TIME;
1793 case USBDEVFS_RESETEP:
1794 snoop(&dev->dev, "%s: RESETEP\n", __func__);
1795 ret = proc_resetep(ps, p);
1797 inode->i_mtime = CURRENT_TIME;
1800 case USBDEVFS_RESET:
1801 snoop(&dev->dev, "%s: RESET\n", __func__);
1802 ret = proc_resetdevice(ps);
1805 case USBDEVFS_CLEAR_HALT:
1806 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
1807 ret = proc_clearhalt(ps, p);
1809 inode->i_mtime = CURRENT_TIME;
1812 case USBDEVFS_GETDRIVER:
1813 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
1814 ret = proc_getdriver(ps, p);
1817 case USBDEVFS_CONNECTINFO:
1818 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
1819 ret = proc_connectinfo(ps, p);
1822 case USBDEVFS_SETINTERFACE:
1823 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
1824 ret = proc_setintf(ps, p);
1827 case USBDEVFS_SETCONFIGURATION:
1828 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
1829 ret = proc_setconfig(ps, p);
1832 case USBDEVFS_SUBMITURB:
1833 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
1834 ret = proc_submiturb(ps, p);
1836 inode->i_mtime = CURRENT_TIME;
1839 #ifdef CONFIG_COMPAT
1840 case USBDEVFS_CONTROL32:
1841 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
1842 ret = proc_control_compat(ps, p);
1844 inode->i_mtime = CURRENT_TIME;
1847 case USBDEVFS_BULK32:
1848 snoop(&dev->dev, "%s: BULK32\n", __func__);
1849 ret = proc_bulk_compat(ps, p);
1851 inode->i_mtime = CURRENT_TIME;
1854 case USBDEVFS_DISCSIGNAL32:
1855 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
1856 ret = proc_disconnectsignal_compat(ps, p);
1859 case USBDEVFS_SUBMITURB32:
1860 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
1861 ret = proc_submiturb_compat(ps, p);
1863 inode->i_mtime = CURRENT_TIME;
1866 case USBDEVFS_REAPURB32:
1867 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
1868 ret = proc_reapurb_compat(ps, p);
1871 case USBDEVFS_REAPURBNDELAY32:
1872 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
1873 ret = proc_reapurbnonblock_compat(ps, p);
1876 case USBDEVFS_IOCTL32:
1877 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
1878 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1882 case USBDEVFS_DISCARDURB:
1883 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
1884 ret = proc_unlinkurb(ps, p);
1887 case USBDEVFS_REAPURB:
1888 snoop(&dev->dev, "%s: REAPURB\n", __func__);
1889 ret = proc_reapurb(ps, p);
1892 case USBDEVFS_REAPURBNDELAY:
1893 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
1894 ret = proc_reapurbnonblock(ps, p);
1897 case USBDEVFS_DISCSIGNAL:
1898 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
1899 ret = proc_disconnectsignal(ps, p);
1902 case USBDEVFS_CLAIMINTERFACE:
1903 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
1904 ret = proc_claiminterface(ps, p);
1907 case USBDEVFS_RELEASEINTERFACE:
1908 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
1909 ret = proc_releaseinterface(ps, p);
1912 case USBDEVFS_IOCTL:
1913 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1914 ret = proc_ioctl_default(ps, p);
1917 case USBDEVFS_CLAIM_PORT:
1918 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
1919 ret = proc_claim_port(ps, p);
1922 case USBDEVFS_RELEASE_PORT:
1923 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
1924 ret = proc_release_port(ps, p);
1927 usb_unlock_device(dev);
1929 inode->i_atime = CURRENT_TIME;
1933 static long usbdev_ioctl(struct file *file, unsigned int cmd,
1938 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
1943 #ifdef CONFIG_COMPAT
1944 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
1949 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
1955 /* No kernel lock - fine */
1956 static unsigned int usbdev_poll(struct file *file,
1957 struct poll_table_struct *wait)
1959 struct dev_state *ps = file->private_data;
1960 unsigned int mask = 0;
1962 poll_wait(file, &ps->wait, wait);
1963 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1964 mask |= POLLOUT | POLLWRNORM;
1966 mask |= POLLERR | POLLHUP;
1970 const struct file_operations usbdev_file_operations = {
1971 .owner = THIS_MODULE,
1972 .llseek = usbdev_lseek,
1973 .read = usbdev_read,
1974 .poll = usbdev_poll,
1975 .unlocked_ioctl = usbdev_ioctl,
1976 #ifdef CONFIG_COMPAT
1977 .compat_ioctl = usbdev_compat_ioctl,
1979 .open = usbdev_open,
1980 .release = usbdev_release,
1983 static void usbdev_remove(struct usb_device *udev)
1985 struct dev_state *ps;
1986 struct siginfo sinfo;
1988 while (!list_empty(&udev->filelist)) {
1989 ps = list_entry(udev->filelist.next, struct dev_state, list);
1990 destroy_all_async(ps);
1991 wake_up_all(&ps->wait);
1992 list_del_init(&ps->list);
1993 if (ps->discsignr) {
1994 sinfo.si_signo = ps->discsignr;
1995 sinfo.si_errno = EPIPE;
1996 sinfo.si_code = SI_ASYNCIO;
1997 sinfo.si_addr = ps->disccontext;
1998 kill_pid_info_as_cred(ps->discsignr, &sinfo,
1999 ps->disc_pid, ps->cred, ps->secid);
2004 #ifdef CONFIG_USB_DEVICE_CLASS
2005 static struct class *usb_classdev_class;
2007 static int usb_classdev_add(struct usb_device *dev)
2009 struct device *cldev;
2011 cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt,
2012 NULL, "usbdev%d.%d", dev->bus->busnum,
2015 return PTR_ERR(cldev);
2016 dev->usb_classdev = cldev;
2020 static void usb_classdev_remove(struct usb_device *dev)
2022 if (dev->usb_classdev)
2023 device_unregister(dev->usb_classdev);
2027 #define usb_classdev_add(dev) 0
2028 #define usb_classdev_remove(dev) do {} while (0)
2032 static int usbdev_notify(struct notifier_block *self,
2033 unsigned long action, void *dev)
2036 case USB_DEVICE_ADD:
2037 if (usb_classdev_add(dev))
2040 case USB_DEVICE_REMOVE:
2041 usb_classdev_remove(dev);
2048 static struct notifier_block usbdev_nb = {
2049 .notifier_call = usbdev_notify,
2052 static struct cdev usb_device_cdev;
2054 int __init usb_devio_init(void)
2058 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2061 printk(KERN_ERR "Unable to register minors for usb_device\n");
2064 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2065 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2067 printk(KERN_ERR "Unable to get usb_device major %d\n",
2071 #ifdef CONFIG_USB_DEVICE_CLASS
2072 usb_classdev_class = class_create(THIS_MODULE, "usb_device");
2073 if (IS_ERR(usb_classdev_class)) {
2074 printk(KERN_ERR "Unable to register usb_device class\n");
2075 retval = PTR_ERR(usb_classdev_class);
2076 cdev_del(&usb_device_cdev);
2077 usb_classdev_class = NULL;
2080 /* devices of this class shadow the major:minor of their parent
2081 * device, so clear ->dev_kobj to prevent adding duplicate entries
2084 usb_classdev_class->dev_kobj = NULL;
2086 usb_register_notify(&usbdev_nb);
2091 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2095 void usb_devio_cleanup(void)
2097 usb_unregister_notify(&usbdev_nb);
2098 #ifdef CONFIG_USB_DEVICE_CLASS
2099 class_destroy(usb_classdev_class);
2101 cdev_del(&usb_device_cdev);
2102 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);