3 * Android IPC Subsystem
5 * Copyright (C) 2007-2008 Google, Inc.
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20 #include <asm/cacheflush.h>
21 #include <linux/fdtable.h>
22 #include <linux/file.h>
23 #include <linux/freezer.h>
25 #include <linux/list.h>
26 #include <linux/miscdevice.h>
28 #include <linux/module.h>
29 #include <linux/mutex.h>
30 #include <linux/nsproxy.h>
31 #include <linux/poll.h>
32 #include <linux/debugfs.h>
33 #include <linux/rbtree.h>
34 #include <linux/sched.h>
35 #include <linux/seq_file.h>
36 #include <linux/uaccess.h>
37 #include <linux/vmalloc.h>
38 #include <linux/slab.h>
39 #include <linux/pid_namespace.h>
42 #include "binder_trace.h"
44 static DEFINE_MUTEX(binder_main_lock);
45 static DEFINE_MUTEX(binder_deferred_lock);
46 static DEFINE_MUTEX(binder_mmap_lock);
48 static HLIST_HEAD(binder_procs);
49 static HLIST_HEAD(binder_deferred_list);
50 static HLIST_HEAD(binder_dead_nodes);
52 static struct dentry *binder_debugfs_dir_entry_root;
53 static struct dentry *binder_debugfs_dir_entry_proc;
54 static struct binder_node *binder_context_mgr_node;
55 static kuid_t binder_context_mgr_uid = INVALID_UID;
56 static int binder_last_id;
57 static struct workqueue_struct *binder_deferred_workqueue;
59 #define BINDER_DEBUG_ENTRY(name) \
60 static int binder_##name##_open(struct inode *inode, struct file *file) \
62 return single_open(file, binder_##name##_show, inode->i_private); \
65 static const struct file_operations binder_##name##_fops = { \
66 .owner = THIS_MODULE, \
67 .open = binder_##name##_open, \
69 .llseek = seq_lseek, \
70 .release = single_release, \
73 static int binder_proc_show(struct seq_file *m, void *unused);
74 BINDER_DEBUG_ENTRY(proc);
76 /* This is only defined in include/asm-arm/sizes.h */
82 #define SZ_4M 0x400000
85 #define FORBIDDEN_MMAP_FLAGS (VM_WRITE)
87 #define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64)
90 BINDER_DEBUG_USER_ERROR = 1U << 0,
91 BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1,
92 BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2,
93 BINDER_DEBUG_OPEN_CLOSE = 1U << 3,
94 BINDER_DEBUG_DEAD_BINDER = 1U << 4,
95 BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5,
96 BINDER_DEBUG_READ_WRITE = 1U << 6,
97 BINDER_DEBUG_USER_REFS = 1U << 7,
98 BINDER_DEBUG_THREADS = 1U << 8,
99 BINDER_DEBUG_TRANSACTION = 1U << 9,
100 BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10,
101 BINDER_DEBUG_FREE_BUFFER = 1U << 11,
102 BINDER_DEBUG_INTERNAL_REFS = 1U << 12,
103 BINDER_DEBUG_BUFFER_ALLOC = 1U << 13,
104 BINDER_DEBUG_PRIORITY_CAP = 1U << 14,
105 BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15,
107 static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
108 BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
109 module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
111 static bool binder_debug_no_lock;
112 module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
114 static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
115 static int binder_stop_on_user_error;
117 static int binder_set_stop_on_user_error(const char *val,
118 struct kernel_param *kp)
122 ret = param_set_int(val, kp);
123 if (binder_stop_on_user_error < 2)
124 wake_up(&binder_user_error_wait);
127 module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
128 param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO);
130 #define binder_debug(mask, x...) \
132 if (binder_debug_mask & mask) \
136 #define binder_user_error(x...) \
138 if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
140 if (binder_stop_on_user_error) \
141 binder_stop_on_user_error = 2; \
144 enum binder_stat_types {
150 BINDER_STAT_TRANSACTION,
151 BINDER_STAT_TRANSACTION_COMPLETE,
155 struct binder_stats {
156 int br[_IOC_NR(BR_FAILED_REPLY) + 1];
157 int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
158 int obj_created[BINDER_STAT_COUNT];
159 int obj_deleted[BINDER_STAT_COUNT];
162 static struct binder_stats binder_stats;
164 static inline void binder_stats_deleted(enum binder_stat_types type)
166 binder_stats.obj_deleted[type]++;
169 static inline void binder_stats_created(enum binder_stat_types type)
171 binder_stats.obj_created[type]++;
174 struct binder_transaction_log_entry {
186 struct binder_transaction_log {
189 struct binder_transaction_log_entry entry[32];
191 static struct binder_transaction_log binder_transaction_log;
192 static struct binder_transaction_log binder_transaction_log_failed;
194 static struct binder_transaction_log_entry *binder_transaction_log_add(
195 struct binder_transaction_log *log)
197 struct binder_transaction_log_entry *e;
199 e = &log->entry[log->next];
200 memset(e, 0, sizeof(*e));
202 if (log->next == ARRAY_SIZE(log->entry)) {
210 struct list_head entry;
212 BINDER_WORK_TRANSACTION = 1,
213 BINDER_WORK_TRANSACTION_COMPLETE,
215 BINDER_WORK_DEAD_BINDER,
216 BINDER_WORK_DEAD_BINDER_AND_CLEAR,
217 BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
223 struct binder_work work;
225 struct rb_node rb_node;
226 struct hlist_node dead_node;
228 struct binder_proc *proc;
229 struct hlist_head refs;
230 int internal_strong_refs;
232 int local_strong_refs;
233 binder_uintptr_t ptr;
234 binder_uintptr_t cookie;
235 unsigned has_strong_ref:1;
236 unsigned pending_strong_ref:1;
237 unsigned has_weak_ref:1;
238 unsigned pending_weak_ref:1;
239 unsigned has_async_transaction:1;
240 unsigned accept_fds:1;
241 unsigned min_priority:8;
242 struct list_head async_todo;
245 struct binder_ref_death {
246 struct binder_work work;
247 binder_uintptr_t cookie;
251 /* Lookups needed: */
252 /* node + proc => ref (transaction) */
253 /* desc + proc => ref (transaction, inc/dec ref) */
254 /* node => refs + procs (proc exit) */
256 struct rb_node rb_node_desc;
257 struct rb_node rb_node_node;
258 struct hlist_node node_entry;
259 struct binder_proc *proc;
260 struct binder_node *node;
264 struct binder_ref_death *death;
267 struct binder_buffer {
268 struct list_head entry; /* free and allocated entries by address */
269 struct rb_node rb_node; /* free entry by size or allocated entry */
272 unsigned allow_user_free:1;
273 unsigned async_transaction:1;
274 unsigned debug_id:29;
276 struct binder_transaction *transaction;
278 struct binder_node *target_node;
284 enum binder_deferred_state {
285 BINDER_DEFERRED_PUT_FILES = 0x01,
286 BINDER_DEFERRED_FLUSH = 0x02,
287 BINDER_DEFERRED_RELEASE = 0x04,
291 struct hlist_node proc_node;
292 struct rb_root threads;
293 struct rb_root nodes;
294 struct rb_root refs_by_desc;
295 struct rb_root refs_by_node;
297 struct vm_area_struct *vma;
298 struct mm_struct *vma_vm_mm;
299 struct task_struct *tsk;
300 struct files_struct *files;
301 struct hlist_node deferred_work_node;
304 ptrdiff_t user_buffer_offset;
306 struct list_head buffers;
307 struct rb_root free_buffers;
308 struct rb_root allocated_buffers;
309 size_t free_async_space;
313 uint32_t buffer_free;
314 struct list_head todo;
315 wait_queue_head_t wait;
316 struct binder_stats stats;
317 struct list_head delivered_death;
319 int requested_threads;
320 int requested_threads_started;
322 long default_priority;
323 struct dentry *debugfs_entry;
327 BINDER_LOOPER_STATE_REGISTERED = 0x01,
328 BINDER_LOOPER_STATE_ENTERED = 0x02,
329 BINDER_LOOPER_STATE_EXITED = 0x04,
330 BINDER_LOOPER_STATE_INVALID = 0x08,
331 BINDER_LOOPER_STATE_WAITING = 0x10,
332 BINDER_LOOPER_STATE_NEED_RETURN = 0x20
335 struct binder_thread {
336 struct binder_proc *proc;
337 struct rb_node rb_node;
340 struct binder_transaction *transaction_stack;
341 struct list_head todo;
342 uint32_t return_error; /* Write failed, return error code in read buf */
343 uint32_t return_error2; /* Write failed, return error code in read */
344 /* buffer. Used when sending a reply to a dead process that */
345 /* we are also waiting on */
346 wait_queue_head_t wait;
347 struct binder_stats stats;
350 struct binder_transaction {
352 struct binder_work work;
353 struct binder_thread *from;
354 struct binder_transaction *from_parent;
355 struct binder_proc *to_proc;
356 struct binder_thread *to_thread;
357 struct binder_transaction *to_parent;
358 unsigned need_reply:1;
359 /* unsigned is_dead:1; */ /* not used at the moment */
361 struct binder_buffer *buffer;
370 binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
372 static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
374 struct files_struct *files = proc->files;
375 unsigned long rlim_cur;
381 if (!lock_task_sighand(proc->tsk, &irqs))
384 rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE);
385 unlock_task_sighand(proc->tsk, &irqs);
387 return __alloc_fd(files, 0, rlim_cur, flags);
391 * copied from fd_install
393 static void task_fd_install(
394 struct binder_proc *proc, unsigned int fd, struct file *file)
397 __fd_install(proc->files, fd, file);
401 * copied from sys_close
403 static long task_close_fd(struct binder_proc *proc, unsigned int fd)
407 if (proc->files == NULL)
410 retval = __close_fd(proc->files, fd);
411 /* can't restart close syscall because file table entry was cleared */
412 if (unlikely(retval == -ERESTARTSYS ||
413 retval == -ERESTARTNOINTR ||
414 retval == -ERESTARTNOHAND ||
415 retval == -ERESTART_RESTARTBLOCK))
421 static inline void binder_lock(const char *tag)
423 trace_binder_lock(tag);
424 mutex_lock(&binder_main_lock);
425 trace_binder_locked(tag);
428 static inline void binder_unlock(const char *tag)
430 trace_binder_unlock(tag);
431 mutex_unlock(&binder_main_lock);
434 static void binder_set_nice(long nice)
438 if (can_nice(current, nice)) {
439 set_user_nice(current, nice);
442 min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur;
443 binder_debug(BINDER_DEBUG_PRIORITY_CAP,
444 "%d: nice value %ld not allowed use %ld instead\n",
445 current->pid, nice, min_nice);
446 set_user_nice(current, min_nice);
449 binder_user_error("%d RLIMIT_NICE not set\n", current->pid);
452 static size_t binder_buffer_size(struct binder_proc *proc,
453 struct binder_buffer *buffer)
455 if (list_is_last(&buffer->entry, &proc->buffers))
456 return proc->buffer + proc->buffer_size - (void *)buffer->data;
457 return (size_t)list_entry(buffer->entry.next,
458 struct binder_buffer, entry) - (size_t)buffer->data;
461 static void binder_insert_free_buffer(struct binder_proc *proc,
462 struct binder_buffer *new_buffer)
464 struct rb_node **p = &proc->free_buffers.rb_node;
465 struct rb_node *parent = NULL;
466 struct binder_buffer *buffer;
468 size_t new_buffer_size;
470 BUG_ON(!new_buffer->free);
472 new_buffer_size = binder_buffer_size(proc, new_buffer);
474 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
475 "%d: add free buffer, size %zd, at %p\n",
476 proc->pid, new_buffer_size, new_buffer);
480 buffer = rb_entry(parent, struct binder_buffer, rb_node);
481 BUG_ON(!buffer->free);
483 buffer_size = binder_buffer_size(proc, buffer);
485 if (new_buffer_size < buffer_size)
486 p = &parent->rb_left;
488 p = &parent->rb_right;
490 rb_link_node(&new_buffer->rb_node, parent, p);
491 rb_insert_color(&new_buffer->rb_node, &proc->free_buffers);
494 static void binder_insert_allocated_buffer(struct binder_proc *proc,
495 struct binder_buffer *new_buffer)
497 struct rb_node **p = &proc->allocated_buffers.rb_node;
498 struct rb_node *parent = NULL;
499 struct binder_buffer *buffer;
501 BUG_ON(new_buffer->free);
505 buffer = rb_entry(parent, struct binder_buffer, rb_node);
506 BUG_ON(buffer->free);
508 if (new_buffer < buffer)
509 p = &parent->rb_left;
510 else if (new_buffer > buffer)
511 p = &parent->rb_right;
515 rb_link_node(&new_buffer->rb_node, parent, p);
516 rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers);
519 static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc,
522 struct rb_node *n = proc->allocated_buffers.rb_node;
523 struct binder_buffer *buffer;
524 struct binder_buffer *kern_ptr;
526 kern_ptr = (struct binder_buffer *)(user_ptr - proc->user_buffer_offset
527 - offsetof(struct binder_buffer, data));
530 buffer = rb_entry(n, struct binder_buffer, rb_node);
531 BUG_ON(buffer->free);
533 if (kern_ptr < buffer)
535 else if (kern_ptr > buffer)
543 static int binder_update_page_range(struct binder_proc *proc, int allocate,
544 void *start, void *end,
545 struct vm_area_struct *vma)
548 unsigned long user_page_addr;
549 struct vm_struct tmp_area;
551 struct mm_struct *mm;
553 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
554 "%d: %s pages %p-%p\n", proc->pid,
555 allocate ? "allocate" : "free", start, end);
560 trace_binder_update_page_range(proc, allocate, start, end);
565 mm = get_task_mm(proc->tsk);
568 down_write(&mm->mmap_sem);
570 if (vma && mm != proc->vma_vm_mm) {
571 pr_err("%d: vma mm and task mm mismatch\n",
581 pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n",
586 for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
588 struct page **page_array_ptr;
590 page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
593 *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
595 pr_err("%d: binder_alloc_buf failed for page at %p\n",
596 proc->pid, page_addr);
597 goto err_alloc_page_failed;
599 tmp_area.addr = page_addr;
600 tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */;
601 page_array_ptr = page;
602 ret = map_vm_area(&tmp_area, PAGE_KERNEL, &page_array_ptr);
604 pr_err("%d: binder_alloc_buf failed to map page at %p in kernel\n",
605 proc->pid, page_addr);
606 goto err_map_kernel_failed;
609 (uintptr_t)page_addr + proc->user_buffer_offset;
610 ret = vm_insert_page(vma, user_page_addr, page[0]);
612 pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
613 proc->pid, user_page_addr);
614 goto err_vm_insert_page_failed;
616 /* vm_insert_page does not seem to increment the refcount */
619 up_write(&mm->mmap_sem);
625 for (page_addr = end - PAGE_SIZE; page_addr >= start;
626 page_addr -= PAGE_SIZE) {
627 page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
629 zap_page_range(vma, (uintptr_t)page_addr +
630 proc->user_buffer_offset, PAGE_SIZE, NULL);
631 err_vm_insert_page_failed:
632 unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
633 err_map_kernel_failed:
636 err_alloc_page_failed:
641 up_write(&mm->mmap_sem);
647 static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
649 size_t offsets_size, int is_async)
651 struct rb_node *n = proc->free_buffers.rb_node;
652 struct binder_buffer *buffer;
654 struct rb_node *best_fit = NULL;
659 if (proc->vma == NULL) {
660 pr_err("%d: binder_alloc_buf, no vma\n",
665 size = ALIGN(data_size, sizeof(void *)) +
666 ALIGN(offsets_size, sizeof(void *));
668 if (size < data_size || size < offsets_size) {
669 binder_user_error("%d: got transaction with invalid size %zd-%zd\n",
670 proc->pid, data_size, offsets_size);
675 proc->free_async_space < size + sizeof(struct binder_buffer)) {
676 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
677 "%d: binder_alloc_buf size %zd failed, no async space left\n",
683 buffer = rb_entry(n, struct binder_buffer, rb_node);
684 BUG_ON(!buffer->free);
685 buffer_size = binder_buffer_size(proc, buffer);
687 if (size < buffer_size) {
690 } else if (size > buffer_size)
697 if (best_fit == NULL) {
698 pr_err("%d: binder_alloc_buf size %zd failed, no address space\n",
703 buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
704 buffer_size = binder_buffer_size(proc, buffer);
707 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
708 "%d: binder_alloc_buf size %zd got buffer %p size %zd\n",
709 proc->pid, size, buffer, buffer_size);
712 (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK);
714 if (size + sizeof(struct binder_buffer) + 4 >= buffer_size)
715 buffer_size = size; /* no room for other buffers */
717 buffer_size = size + sizeof(struct binder_buffer);
720 (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size);
721 if (end_page_addr > has_page_addr)
722 end_page_addr = has_page_addr;
723 if (binder_update_page_range(proc, 1,
724 (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL))
727 rb_erase(best_fit, &proc->free_buffers);
729 binder_insert_allocated_buffer(proc, buffer);
730 if (buffer_size != size) {
731 struct binder_buffer *new_buffer = (void *)buffer->data + size;
733 list_add(&new_buffer->entry, &buffer->entry);
734 new_buffer->free = 1;
735 binder_insert_free_buffer(proc, new_buffer);
737 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
738 "%d: binder_alloc_buf size %zd got %p\n",
739 proc->pid, size, buffer);
740 buffer->data_size = data_size;
741 buffer->offsets_size = offsets_size;
742 buffer->async_transaction = is_async;
744 proc->free_async_space -= size + sizeof(struct binder_buffer);
745 binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
746 "%d: binder_alloc_buf size %zd async free %zd\n",
747 proc->pid, size, proc->free_async_space);
753 static void *buffer_start_page(struct binder_buffer *buffer)
755 return (void *)((uintptr_t)buffer & PAGE_MASK);
758 static void *buffer_end_page(struct binder_buffer *buffer)
760 return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK);
763 static void binder_delete_free_buffer(struct binder_proc *proc,
764 struct binder_buffer *buffer)
766 struct binder_buffer *prev, *next = NULL;
767 int free_page_end = 1;
768 int free_page_start = 1;
770 BUG_ON(proc->buffers.next == &buffer->entry);
771 prev = list_entry(buffer->entry.prev, struct binder_buffer, entry);
773 if (buffer_end_page(prev) == buffer_start_page(buffer)) {
775 if (buffer_end_page(prev) == buffer_end_page(buffer))
777 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
778 "%d: merge free, buffer %p share page with %p\n",
779 proc->pid, buffer, prev);
782 if (!list_is_last(&buffer->entry, &proc->buffers)) {
783 next = list_entry(buffer->entry.next,
784 struct binder_buffer, entry);
785 if (buffer_start_page(next) == buffer_end_page(buffer)) {
787 if (buffer_start_page(next) ==
788 buffer_start_page(buffer))
790 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
791 "%d: merge free, buffer %p share page with %p\n",
792 proc->pid, buffer, prev);
795 list_del(&buffer->entry);
796 if (free_page_start || free_page_end) {
797 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
798 "%d: merge free, buffer %p do not share page%s%s with %p or %p\n",
799 proc->pid, buffer, free_page_start ? "" : " end",
800 free_page_end ? "" : " start", prev, next);
801 binder_update_page_range(proc, 0, free_page_start ?
802 buffer_start_page(buffer) : buffer_end_page(buffer),
803 (free_page_end ? buffer_end_page(buffer) :
804 buffer_start_page(buffer)) + PAGE_SIZE, NULL);
808 static void binder_free_buf(struct binder_proc *proc,
809 struct binder_buffer *buffer)
811 size_t size, buffer_size;
813 buffer_size = binder_buffer_size(proc, buffer);
815 size = ALIGN(buffer->data_size, sizeof(void *)) +
816 ALIGN(buffer->offsets_size, sizeof(void *));
818 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
819 "%d: binder_free_buf %p size %zd buffer_size %zd\n",
820 proc->pid, buffer, size, buffer_size);
822 BUG_ON(buffer->free);
823 BUG_ON(size > buffer_size);
824 BUG_ON(buffer->transaction != NULL);
825 BUG_ON((void *)buffer < proc->buffer);
826 BUG_ON((void *)buffer > proc->buffer + proc->buffer_size);
828 if (buffer->async_transaction) {
829 proc->free_async_space += size + sizeof(struct binder_buffer);
831 binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
832 "%d: binder_free_buf size %zd async free %zd\n",
833 proc->pid, size, proc->free_async_space);
836 binder_update_page_range(proc, 0,
837 (void *)PAGE_ALIGN((uintptr_t)buffer->data),
838 (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK),
840 rb_erase(&buffer->rb_node, &proc->allocated_buffers);
842 if (!list_is_last(&buffer->entry, &proc->buffers)) {
843 struct binder_buffer *next = list_entry(buffer->entry.next,
844 struct binder_buffer, entry);
847 rb_erase(&next->rb_node, &proc->free_buffers);
848 binder_delete_free_buffer(proc, next);
851 if (proc->buffers.next != &buffer->entry) {
852 struct binder_buffer *prev = list_entry(buffer->entry.prev,
853 struct binder_buffer, entry);
856 binder_delete_free_buffer(proc, buffer);
857 rb_erase(&prev->rb_node, &proc->free_buffers);
861 binder_insert_free_buffer(proc, buffer);
864 static struct binder_node *binder_get_node(struct binder_proc *proc,
865 binder_uintptr_t ptr)
867 struct rb_node *n = proc->nodes.rb_node;
868 struct binder_node *node;
871 node = rb_entry(n, struct binder_node, rb_node);
875 else if (ptr > node->ptr)
883 static struct binder_node *binder_new_node(struct binder_proc *proc,
884 binder_uintptr_t ptr,
885 binder_uintptr_t cookie)
887 struct rb_node **p = &proc->nodes.rb_node;
888 struct rb_node *parent = NULL;
889 struct binder_node *node;
893 node = rb_entry(parent, struct binder_node, rb_node);
897 else if (ptr > node->ptr)
903 node = kzalloc(sizeof(*node), GFP_KERNEL);
906 binder_stats_created(BINDER_STAT_NODE);
907 rb_link_node(&node->rb_node, parent, p);
908 rb_insert_color(&node->rb_node, &proc->nodes);
909 node->debug_id = ++binder_last_id;
912 node->cookie = cookie;
913 node->work.type = BINDER_WORK_NODE;
914 INIT_LIST_HEAD(&node->work.entry);
915 INIT_LIST_HEAD(&node->async_todo);
916 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
917 "%d:%d node %d u%016llx c%016llx created\n",
918 proc->pid, current->pid, node->debug_id,
919 (u64)node->ptr, (u64)node->cookie);
923 static int binder_inc_node(struct binder_node *node, int strong, int internal,
924 struct list_head *target_list)
928 if (target_list == NULL &&
929 node->internal_strong_refs == 0 &&
930 !(node == binder_context_mgr_node &&
931 node->has_strong_ref)) {
932 pr_err("invalid inc strong node for %d\n",
936 node->internal_strong_refs++;
938 node->local_strong_refs++;
939 if (!node->has_strong_ref && target_list) {
940 list_del_init(&node->work.entry);
941 list_add_tail(&node->work.entry, target_list);
945 node->local_weak_refs++;
946 if (!node->has_weak_ref && list_empty(&node->work.entry)) {
947 if (target_list == NULL) {
948 pr_err("invalid inc weak node for %d\n",
952 list_add_tail(&node->work.entry, target_list);
958 static int binder_dec_node(struct binder_node *node, int strong, int internal)
962 node->internal_strong_refs--;
964 node->local_strong_refs--;
965 if (node->local_strong_refs || node->internal_strong_refs)
969 node->local_weak_refs--;
970 if (node->local_weak_refs || !hlist_empty(&node->refs))
973 if (node->proc && (node->has_strong_ref || node->has_weak_ref)) {
974 if (list_empty(&node->work.entry)) {
975 list_add_tail(&node->work.entry, &node->proc->todo);
976 wake_up_interruptible(&node->proc->wait);
979 if (hlist_empty(&node->refs) && !node->local_strong_refs &&
980 !node->local_weak_refs) {
981 list_del_init(&node->work.entry);
983 rb_erase(&node->rb_node, &node->proc->nodes);
984 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
985 "refless node %d deleted\n",
988 hlist_del(&node->dead_node);
989 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
990 "dead node %d deleted\n",
994 binder_stats_deleted(BINDER_STAT_NODE);
1002 static struct binder_ref *binder_get_ref(struct binder_proc *proc,
1005 struct rb_node *n = proc->refs_by_desc.rb_node;
1006 struct binder_ref *ref;
1009 ref = rb_entry(n, struct binder_ref, rb_node_desc);
1011 if (desc < ref->desc)
1013 else if (desc > ref->desc)
1021 static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc,
1022 struct binder_node *node)
1025 struct rb_node **p = &proc->refs_by_node.rb_node;
1026 struct rb_node *parent = NULL;
1027 struct binder_ref *ref, *new_ref;
1031 ref = rb_entry(parent, struct binder_ref, rb_node_node);
1033 if (node < ref->node)
1035 else if (node > ref->node)
1036 p = &(*p)->rb_right;
1040 new_ref = kzalloc(sizeof(*ref), GFP_KERNEL);
1041 if (new_ref == NULL)
1043 binder_stats_created(BINDER_STAT_REF);
1044 new_ref->debug_id = ++binder_last_id;
1045 new_ref->proc = proc;
1046 new_ref->node = node;
1047 rb_link_node(&new_ref->rb_node_node, parent, p);
1048 rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
1050 new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1;
1051 for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
1052 ref = rb_entry(n, struct binder_ref, rb_node_desc);
1053 if (ref->desc > new_ref->desc)
1055 new_ref->desc = ref->desc + 1;
1058 p = &proc->refs_by_desc.rb_node;
1061 ref = rb_entry(parent, struct binder_ref, rb_node_desc);
1063 if (new_ref->desc < ref->desc)
1065 else if (new_ref->desc > ref->desc)
1066 p = &(*p)->rb_right;
1070 rb_link_node(&new_ref->rb_node_desc, parent, p);
1071 rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc);
1073 hlist_add_head(&new_ref->node_entry, &node->refs);
1075 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
1076 "%d new ref %d desc %d for node %d\n",
1077 proc->pid, new_ref->debug_id, new_ref->desc,
1080 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
1081 "%d new ref %d desc %d for dead node\n",
1082 proc->pid, new_ref->debug_id, new_ref->desc);
1087 static void binder_delete_ref(struct binder_ref *ref)
1089 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
1090 "%d delete ref %d desc %d for node %d\n",
1091 ref->proc->pid, ref->debug_id, ref->desc,
1092 ref->node->debug_id);
1094 rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc);
1095 rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node);
1097 binder_dec_node(ref->node, 1, 1);
1098 hlist_del(&ref->node_entry);
1099 binder_dec_node(ref->node, 0, 1);
1101 binder_debug(BINDER_DEBUG_DEAD_BINDER,
1102 "%d delete ref %d desc %d has death notification\n",
1103 ref->proc->pid, ref->debug_id, ref->desc);
1104 list_del(&ref->death->work.entry);
1106 binder_stats_deleted(BINDER_STAT_DEATH);
1109 binder_stats_deleted(BINDER_STAT_REF);
1112 static int binder_inc_ref(struct binder_ref *ref, int strong,
1113 struct list_head *target_list)
1118 if (ref->strong == 0) {
1119 ret = binder_inc_node(ref->node, 1, 1, target_list);
1125 if (ref->weak == 0) {
1126 ret = binder_inc_node(ref->node, 0, 1, target_list);
1136 static int binder_dec_ref(struct binder_ref *ref, int strong)
1139 if (ref->strong == 0) {
1140 binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n",
1141 ref->proc->pid, ref->debug_id,
1142 ref->desc, ref->strong, ref->weak);
1146 if (ref->strong == 0) {
1149 ret = binder_dec_node(ref->node, strong, 1);
1154 if (ref->weak == 0) {
1155 binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n",
1156 ref->proc->pid, ref->debug_id,
1157 ref->desc, ref->strong, ref->weak);
1162 if (ref->strong == 0 && ref->weak == 0)
1163 binder_delete_ref(ref);
1167 static void binder_pop_transaction(struct binder_thread *target_thread,
1168 struct binder_transaction *t)
1170 if (target_thread) {
1171 BUG_ON(target_thread->transaction_stack != t);
1172 BUG_ON(target_thread->transaction_stack->from != target_thread);
1173 target_thread->transaction_stack =
1174 target_thread->transaction_stack->from_parent;
1179 t->buffer->transaction = NULL;
1181 binder_stats_deleted(BINDER_STAT_TRANSACTION);
1184 static void binder_send_failed_reply(struct binder_transaction *t,
1185 uint32_t error_code)
1187 struct binder_thread *target_thread;
1188 struct binder_transaction *next;
1190 BUG_ON(t->flags & TF_ONE_WAY);
1192 target_thread = t->from;
1193 if (target_thread) {
1194 if (target_thread->return_error != BR_OK &&
1195 target_thread->return_error2 == BR_OK) {
1196 target_thread->return_error2 =
1197 target_thread->return_error;
1198 target_thread->return_error = BR_OK;
1200 if (target_thread->return_error == BR_OK) {
1201 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
1202 "send failed reply for transaction %d to %d:%d\n",
1204 target_thread->proc->pid,
1205 target_thread->pid);
1207 binder_pop_transaction(target_thread, t);
1208 target_thread->return_error = error_code;
1209 wake_up_interruptible(&target_thread->wait);
1211 pr_err("reply failed, target thread, %d:%d, has error code %d already\n",
1212 target_thread->proc->pid,
1214 target_thread->return_error);
1218 next = t->from_parent;
1220 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
1221 "send failed reply for transaction %d, target dead\n",
1224 binder_pop_transaction(target_thread, t);
1226 binder_debug(BINDER_DEBUG_DEAD_BINDER,
1227 "reply failed, no target thread at root\n");
1231 binder_debug(BINDER_DEBUG_DEAD_BINDER,
1232 "reply failed, no target thread -- retry %d\n",
1237 static void binder_transaction_buffer_release(struct binder_proc *proc,
1238 struct binder_buffer *buffer,
1239 binder_size_t *failed_at)
1241 binder_size_t *offp, *off_end;
1242 int debug_id = buffer->debug_id;
1244 binder_debug(BINDER_DEBUG_TRANSACTION,
1245 "%d buffer release %d, size %zd-%zd, failed at %p\n",
1246 proc->pid, buffer->debug_id,
1247 buffer->data_size, buffer->offsets_size, failed_at);
1249 if (buffer->target_node)
1250 binder_dec_node(buffer->target_node, 1, 0);
1252 offp = (binder_size_t *)(buffer->data +
1253 ALIGN(buffer->data_size, sizeof(void *)));
1255 off_end = failed_at;
1257 off_end = (void *)offp + buffer->offsets_size;
1258 for (; offp < off_end; offp++) {
1259 struct flat_binder_object *fp;
1261 if (*offp > buffer->data_size - sizeof(*fp) ||
1262 buffer->data_size < sizeof(*fp) ||
1263 !IS_ALIGNED(*offp, sizeof(u32))) {
1264 pr_err("transaction release %d bad offset %lld, size %zd\n",
1265 debug_id, (u64)*offp, buffer->data_size);
1268 fp = (struct flat_binder_object *)(buffer->data + *offp);
1270 case BINDER_TYPE_BINDER:
1271 case BINDER_TYPE_WEAK_BINDER: {
1272 struct binder_node *node = binder_get_node(proc, fp->binder);
1275 pr_err("transaction release %d bad node %016llx\n",
1276 debug_id, (u64)fp->binder);
1279 binder_debug(BINDER_DEBUG_TRANSACTION,
1280 " node %d u%016llx\n",
1281 node->debug_id, (u64)node->ptr);
1282 binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
1284 case BINDER_TYPE_HANDLE:
1285 case BINDER_TYPE_WEAK_HANDLE: {
1286 struct binder_ref *ref = binder_get_ref(proc, fp->handle);
1289 pr_err("transaction release %d bad handle %d\n",
1290 debug_id, fp->handle);
1293 binder_debug(BINDER_DEBUG_TRANSACTION,
1294 " ref %d desc %d (node %d)\n",
1295 ref->debug_id, ref->desc, ref->node->debug_id);
1296 binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE);
1299 case BINDER_TYPE_FD:
1300 binder_debug(BINDER_DEBUG_TRANSACTION,
1301 " fd %d\n", fp->handle);
1303 task_close_fd(proc, fp->handle);
1307 pr_err("transaction release %d bad object type %x\n",
1308 debug_id, fp->type);
1314 static void binder_transaction(struct binder_proc *proc,
1315 struct binder_thread *thread,
1316 struct binder_transaction_data *tr, int reply)
1318 struct binder_transaction *t;
1319 struct binder_work *tcomplete;
1320 binder_size_t *offp, *off_end;
1321 struct binder_proc *target_proc;
1322 struct binder_thread *target_thread = NULL;
1323 struct binder_node *target_node = NULL;
1324 struct list_head *target_list;
1325 wait_queue_head_t *target_wait;
1326 struct binder_transaction *in_reply_to = NULL;
1327 struct binder_transaction_log_entry *e;
1328 uint32_t return_error;
1330 e = binder_transaction_log_add(&binder_transaction_log);
1331 e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
1332 e->from_proc = proc->pid;
1333 e->from_thread = thread->pid;
1334 e->target_handle = tr->target.handle;
1335 e->data_size = tr->data_size;
1336 e->offsets_size = tr->offsets_size;
1339 in_reply_to = thread->transaction_stack;
1340 if (in_reply_to == NULL) {
1341 binder_user_error("%d:%d got reply transaction with no transaction stack\n",
1342 proc->pid, thread->pid);
1343 return_error = BR_FAILED_REPLY;
1344 goto err_empty_call_stack;
1346 binder_set_nice(in_reply_to->saved_priority);
1347 if (in_reply_to->to_thread != thread) {
1348 binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n",
1349 proc->pid, thread->pid, in_reply_to->debug_id,
1350 in_reply_to->to_proc ?
1351 in_reply_to->to_proc->pid : 0,
1352 in_reply_to->to_thread ?
1353 in_reply_to->to_thread->pid : 0);
1354 return_error = BR_FAILED_REPLY;
1356 goto err_bad_call_stack;
1358 thread->transaction_stack = in_reply_to->to_parent;
1359 target_thread = in_reply_to->from;
1360 if (target_thread == NULL) {
1361 return_error = BR_DEAD_REPLY;
1362 goto err_dead_binder;
1364 if (target_thread->transaction_stack != in_reply_to) {
1365 binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n",
1366 proc->pid, thread->pid,
1367 target_thread->transaction_stack ?
1368 target_thread->transaction_stack->debug_id : 0,
1369 in_reply_to->debug_id);
1370 return_error = BR_FAILED_REPLY;
1372 target_thread = NULL;
1373 goto err_dead_binder;
1375 target_proc = target_thread->proc;
1377 if (tr->target.handle) {
1378 struct binder_ref *ref;
1380 ref = binder_get_ref(proc, tr->target.handle);
1382 binder_user_error("%d:%d got transaction to invalid handle\n",
1383 proc->pid, thread->pid);
1384 return_error = BR_FAILED_REPLY;
1385 goto err_invalid_target_handle;
1387 target_node = ref->node;
1389 target_node = binder_context_mgr_node;
1390 if (target_node == NULL) {
1391 return_error = BR_DEAD_REPLY;
1392 goto err_no_context_mgr_node;
1395 e->to_node = target_node->debug_id;
1396 target_proc = target_node->proc;
1397 if (target_proc == NULL) {
1398 return_error = BR_DEAD_REPLY;
1399 goto err_dead_binder;
1401 if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) {
1402 struct binder_transaction *tmp;
1404 tmp = thread->transaction_stack;
1405 if (tmp->to_thread != thread) {
1406 binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n",
1407 proc->pid, thread->pid, tmp->debug_id,
1408 tmp->to_proc ? tmp->to_proc->pid : 0,
1410 tmp->to_thread->pid : 0);
1411 return_error = BR_FAILED_REPLY;
1412 goto err_bad_call_stack;
1415 if (tmp->from && tmp->from->proc == target_proc)
1416 target_thread = tmp->from;
1417 tmp = tmp->from_parent;
1421 if (target_thread) {
1422 e->to_thread = target_thread->pid;
1423 target_list = &target_thread->todo;
1424 target_wait = &target_thread->wait;
1426 target_list = &target_proc->todo;
1427 target_wait = &target_proc->wait;
1429 e->to_proc = target_proc->pid;
1431 /* TODO: reuse incoming transaction for reply */
1432 t = kzalloc(sizeof(*t), GFP_KERNEL);
1434 return_error = BR_FAILED_REPLY;
1435 goto err_alloc_t_failed;
1437 binder_stats_created(BINDER_STAT_TRANSACTION);
1439 tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
1440 if (tcomplete == NULL) {
1441 return_error = BR_FAILED_REPLY;
1442 goto err_alloc_tcomplete_failed;
1444 binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE);
1446 t->debug_id = ++binder_last_id;
1447 e->debug_id = t->debug_id;
1450 binder_debug(BINDER_DEBUG_TRANSACTION,
1451 "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld\n",
1452 proc->pid, thread->pid, t->debug_id,
1453 target_proc->pid, target_thread->pid,
1454 (u64)tr->data.ptr.buffer,
1455 (u64)tr->data.ptr.offsets,
1456 (u64)tr->data_size, (u64)tr->offsets_size);
1458 binder_debug(BINDER_DEBUG_TRANSACTION,
1459 "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld\n",
1460 proc->pid, thread->pid, t->debug_id,
1461 target_proc->pid, target_node->debug_id,
1462 (u64)tr->data.ptr.buffer,
1463 (u64)tr->data.ptr.offsets,
1464 (u64)tr->data_size, (u64)tr->offsets_size);
1466 if (!reply && !(tr->flags & TF_ONE_WAY))
1470 t->sender_euid = task_euid(proc->tsk);
1471 t->to_proc = target_proc;
1472 t->to_thread = target_thread;
1474 t->flags = tr->flags;
1475 t->priority = task_nice(current);
1477 trace_binder_transaction(reply, t, target_node);
1479 t->buffer = binder_alloc_buf(target_proc, tr->data_size,
1480 tr->offsets_size, !reply && (t->flags & TF_ONE_WAY));
1481 if (t->buffer == NULL) {
1482 return_error = BR_FAILED_REPLY;
1483 goto err_binder_alloc_buf_failed;
1485 t->buffer->allow_user_free = 0;
1486 t->buffer->debug_id = t->debug_id;
1487 t->buffer->transaction = t;
1488 t->buffer->target_node = target_node;
1489 trace_binder_transaction_alloc_buf(t->buffer);
1491 binder_inc_node(target_node, 1, 0, NULL);
1493 offp = (binder_size_t *)(t->buffer->data +
1494 ALIGN(tr->data_size, sizeof(void *)));
1496 if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t)
1497 tr->data.ptr.buffer, tr->data_size)) {
1498 binder_user_error("%d:%d got transaction with invalid data ptr\n",
1499 proc->pid, thread->pid);
1500 return_error = BR_FAILED_REPLY;
1501 goto err_copy_data_failed;
1503 if (copy_from_user(offp, (const void __user *)(uintptr_t)
1504 tr->data.ptr.offsets, tr->offsets_size)) {
1505 binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
1506 proc->pid, thread->pid);
1507 return_error = BR_FAILED_REPLY;
1508 goto err_copy_data_failed;
1510 if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) {
1511 binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n",
1512 proc->pid, thread->pid, (u64)tr->offsets_size);
1513 return_error = BR_FAILED_REPLY;
1514 goto err_bad_offset;
1516 off_end = (void *)offp + tr->offsets_size;
1517 for (; offp < off_end; offp++) {
1518 struct flat_binder_object *fp;
1520 if (*offp > t->buffer->data_size - sizeof(*fp) ||
1521 t->buffer->data_size < sizeof(*fp) ||
1522 !IS_ALIGNED(*offp, sizeof(u32))) {
1523 binder_user_error("%d:%d got transaction with invalid offset, %lld\n",
1524 proc->pid, thread->pid, (u64)*offp);
1525 return_error = BR_FAILED_REPLY;
1526 goto err_bad_offset;
1528 fp = (struct flat_binder_object *)(t->buffer->data + *offp);
1530 case BINDER_TYPE_BINDER:
1531 case BINDER_TYPE_WEAK_BINDER: {
1532 struct binder_ref *ref;
1533 struct binder_node *node = binder_get_node(proc, fp->binder);
1536 node = binder_new_node(proc, fp->binder, fp->cookie);
1538 return_error = BR_FAILED_REPLY;
1539 goto err_binder_new_node_failed;
1541 node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
1542 node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
1544 if (fp->cookie != node->cookie) {
1545 binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
1546 proc->pid, thread->pid,
1547 (u64)fp->binder, node->debug_id,
1548 (u64)fp->cookie, (u64)node->cookie);
1549 return_error = BR_FAILED_REPLY;
1550 goto err_binder_get_ref_for_node_failed;
1552 ref = binder_get_ref_for_node(target_proc, node);
1554 return_error = BR_FAILED_REPLY;
1555 goto err_binder_get_ref_for_node_failed;
1557 if (fp->type == BINDER_TYPE_BINDER)
1558 fp->type = BINDER_TYPE_HANDLE;
1560 fp->type = BINDER_TYPE_WEAK_HANDLE;
1561 fp->handle = ref->desc;
1562 binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE,
1565 trace_binder_transaction_node_to_ref(t, node, ref);
1566 binder_debug(BINDER_DEBUG_TRANSACTION,
1567 " node %d u%016llx -> ref %d desc %d\n",
1568 node->debug_id, (u64)node->ptr,
1569 ref->debug_id, ref->desc);
1571 case BINDER_TYPE_HANDLE:
1572 case BINDER_TYPE_WEAK_HANDLE: {
1573 struct binder_ref *ref = binder_get_ref(proc, fp->handle);
1576 binder_user_error("%d:%d got transaction with invalid handle, %d\n",
1578 thread->pid, fp->handle);
1579 return_error = BR_FAILED_REPLY;
1580 goto err_binder_get_ref_failed;
1582 if (ref->node->proc == target_proc) {
1583 if (fp->type == BINDER_TYPE_HANDLE)
1584 fp->type = BINDER_TYPE_BINDER;
1586 fp->type = BINDER_TYPE_WEAK_BINDER;
1587 fp->binder = ref->node->ptr;
1588 fp->cookie = ref->node->cookie;
1589 binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL);
1590 trace_binder_transaction_ref_to_node(t, ref);
1591 binder_debug(BINDER_DEBUG_TRANSACTION,
1592 " ref %d desc %d -> node %d u%016llx\n",
1593 ref->debug_id, ref->desc, ref->node->debug_id,
1594 (u64)ref->node->ptr);
1596 struct binder_ref *new_ref;
1598 new_ref = binder_get_ref_for_node(target_proc, ref->node);
1599 if (new_ref == NULL) {
1600 return_error = BR_FAILED_REPLY;
1601 goto err_binder_get_ref_for_node_failed;
1603 fp->handle = new_ref->desc;
1604 binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
1605 trace_binder_transaction_ref_to_ref(t, ref,
1607 binder_debug(BINDER_DEBUG_TRANSACTION,
1608 " ref %d desc %d -> ref %d desc %d (node %d)\n",
1609 ref->debug_id, ref->desc, new_ref->debug_id,
1610 new_ref->desc, ref->node->debug_id);
1614 case BINDER_TYPE_FD: {
1619 if (!(in_reply_to->flags & TF_ACCEPT_FDS)) {
1620 binder_user_error("%d:%d got reply with fd, %d, but target does not allow fds\n",
1621 proc->pid, thread->pid, fp->handle);
1622 return_error = BR_FAILED_REPLY;
1623 goto err_fd_not_allowed;
1625 } else if (!target_node->accept_fds) {
1626 binder_user_error("%d:%d got transaction with fd, %d, but target does not allow fds\n",
1627 proc->pid, thread->pid, fp->handle);
1628 return_error = BR_FAILED_REPLY;
1629 goto err_fd_not_allowed;
1632 file = fget(fp->handle);
1634 binder_user_error("%d:%d got transaction with invalid fd, %d\n",
1635 proc->pid, thread->pid, fp->handle);
1636 return_error = BR_FAILED_REPLY;
1637 goto err_fget_failed;
1639 target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC);
1640 if (target_fd < 0) {
1642 return_error = BR_FAILED_REPLY;
1643 goto err_get_unused_fd_failed;
1645 task_fd_install(target_proc, target_fd, file);
1646 trace_binder_transaction_fd(t, fp->handle, target_fd);
1647 binder_debug(BINDER_DEBUG_TRANSACTION,
1648 " fd %d -> %d\n", fp->handle, target_fd);
1650 fp->handle = target_fd;
1654 binder_user_error("%d:%d got transaction with invalid object type, %x\n",
1655 proc->pid, thread->pid, fp->type);
1656 return_error = BR_FAILED_REPLY;
1657 goto err_bad_object_type;
1661 BUG_ON(t->buffer->async_transaction != 0);
1662 binder_pop_transaction(target_thread, in_reply_to);
1663 } else if (!(t->flags & TF_ONE_WAY)) {
1664 BUG_ON(t->buffer->async_transaction != 0);
1666 t->from_parent = thread->transaction_stack;
1667 thread->transaction_stack = t;
1669 BUG_ON(target_node == NULL);
1670 BUG_ON(t->buffer->async_transaction != 1);
1671 if (target_node->has_async_transaction) {
1672 target_list = &target_node->async_todo;
1675 target_node->has_async_transaction = 1;
1677 t->work.type = BINDER_WORK_TRANSACTION;
1678 list_add_tail(&t->work.entry, target_list);
1679 tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE;
1680 list_add_tail(&tcomplete->entry, &thread->todo);
1682 wake_up_interruptible(target_wait);
1685 err_get_unused_fd_failed:
1688 err_binder_get_ref_for_node_failed:
1689 err_binder_get_ref_failed:
1690 err_binder_new_node_failed:
1691 err_bad_object_type:
1693 err_copy_data_failed:
1694 trace_binder_transaction_failed_buffer_release(t->buffer);
1695 binder_transaction_buffer_release(target_proc, t->buffer, offp);
1696 t->buffer->transaction = NULL;
1697 binder_free_buf(target_proc, t->buffer);
1698 err_binder_alloc_buf_failed:
1700 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
1701 err_alloc_tcomplete_failed:
1703 binder_stats_deleted(BINDER_STAT_TRANSACTION);
1706 err_empty_call_stack:
1708 err_invalid_target_handle:
1709 err_no_context_mgr_node:
1710 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
1711 "%d:%d transaction failed %d, size %lld-%lld\n",
1712 proc->pid, thread->pid, return_error,
1713 (u64)tr->data_size, (u64)tr->offsets_size);
1716 struct binder_transaction_log_entry *fe;
1718 fe = binder_transaction_log_add(&binder_transaction_log_failed);
1722 BUG_ON(thread->return_error != BR_OK);
1724 thread->return_error = BR_TRANSACTION_COMPLETE;
1725 binder_send_failed_reply(in_reply_to, return_error);
1727 thread->return_error = return_error;
1730 static int binder_thread_write(struct binder_proc *proc,
1731 struct binder_thread *thread,
1732 binder_uintptr_t binder_buffer, size_t size,
1733 binder_size_t *consumed)
1736 void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
1737 void __user *ptr = buffer + *consumed;
1738 void __user *end = buffer + size;
1740 while (ptr < end && thread->return_error == BR_OK) {
1741 if (get_user(cmd, (uint32_t __user *)ptr))
1743 ptr += sizeof(uint32_t);
1744 trace_binder_command(cmd);
1745 if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) {
1746 binder_stats.bc[_IOC_NR(cmd)]++;
1747 proc->stats.bc[_IOC_NR(cmd)]++;
1748 thread->stats.bc[_IOC_NR(cmd)]++;
1756 struct binder_ref *ref;
1757 const char *debug_string;
1759 if (get_user(target, (uint32_t __user *)ptr))
1761 ptr += sizeof(uint32_t);
1762 if (target == 0 && binder_context_mgr_node &&
1763 (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) {
1764 ref = binder_get_ref_for_node(proc,
1765 binder_context_mgr_node);
1766 if (ref->desc != target) {
1767 binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n",
1768 proc->pid, thread->pid,
1772 ref = binder_get_ref(proc, target);
1774 binder_user_error("%d:%d refcount change on invalid ref %d\n",
1775 proc->pid, thread->pid, target);
1780 debug_string = "IncRefs";
1781 binder_inc_ref(ref, 0, NULL);
1784 debug_string = "Acquire";
1785 binder_inc_ref(ref, 1, NULL);
1788 debug_string = "Release";
1789 binder_dec_ref(ref, 1);
1793 debug_string = "DecRefs";
1794 binder_dec_ref(ref, 0);
1797 binder_debug(BINDER_DEBUG_USER_REFS,
1798 "%d:%d %s ref %d desc %d s %d w %d for node %d\n",
1799 proc->pid, thread->pid, debug_string, ref->debug_id,
1800 ref->desc, ref->strong, ref->weak, ref->node->debug_id);
1803 case BC_INCREFS_DONE:
1804 case BC_ACQUIRE_DONE: {
1805 binder_uintptr_t node_ptr;
1806 binder_uintptr_t cookie;
1807 struct binder_node *node;
1809 if (get_user(node_ptr, (binder_uintptr_t __user *)ptr))
1811 ptr += sizeof(binder_uintptr_t);
1812 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
1814 ptr += sizeof(binder_uintptr_t);
1815 node = binder_get_node(proc, node_ptr);
1817 binder_user_error("%d:%d %s u%016llx no match\n",
1818 proc->pid, thread->pid,
1819 cmd == BC_INCREFS_DONE ?
1825 if (cookie != node->cookie) {
1826 binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n",
1827 proc->pid, thread->pid,
1828 cmd == BC_INCREFS_DONE ?
1829 "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
1830 (u64)node_ptr, node->debug_id,
1831 (u64)cookie, (u64)node->cookie);
1834 if (cmd == BC_ACQUIRE_DONE) {
1835 if (node->pending_strong_ref == 0) {
1836 binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n",
1837 proc->pid, thread->pid,
1841 node->pending_strong_ref = 0;
1843 if (node->pending_weak_ref == 0) {
1844 binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n",
1845 proc->pid, thread->pid,
1849 node->pending_weak_ref = 0;
1851 binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0);
1852 binder_debug(BINDER_DEBUG_USER_REFS,
1853 "%d:%d %s node %d ls %d lw %d\n",
1854 proc->pid, thread->pid,
1855 cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
1856 node->debug_id, node->local_strong_refs, node->local_weak_refs);
1859 case BC_ATTEMPT_ACQUIRE:
1860 pr_err("BC_ATTEMPT_ACQUIRE not supported\n");
1862 case BC_ACQUIRE_RESULT:
1863 pr_err("BC_ACQUIRE_RESULT not supported\n");
1866 case BC_FREE_BUFFER: {
1867 binder_uintptr_t data_ptr;
1868 struct binder_buffer *buffer;
1870 if (get_user(data_ptr, (binder_uintptr_t __user *)ptr))
1872 ptr += sizeof(binder_uintptr_t);
1874 buffer = binder_buffer_lookup(proc, data_ptr);
1875 if (buffer == NULL) {
1876 binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n",
1877 proc->pid, thread->pid, (u64)data_ptr);
1880 if (!buffer->allow_user_free) {
1881 binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n",
1882 proc->pid, thread->pid, (u64)data_ptr);
1885 binder_debug(BINDER_DEBUG_FREE_BUFFER,
1886 "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n",
1887 proc->pid, thread->pid, (u64)data_ptr,
1889 buffer->transaction ? "active" : "finished");
1891 if (buffer->transaction) {
1892 buffer->transaction->buffer = NULL;
1893 buffer->transaction = NULL;
1895 if (buffer->async_transaction && buffer->target_node) {
1896 BUG_ON(!buffer->target_node->has_async_transaction);
1897 if (list_empty(&buffer->target_node->async_todo))
1898 buffer->target_node->has_async_transaction = 0;
1900 list_move_tail(buffer->target_node->async_todo.next, &thread->todo);
1902 trace_binder_transaction_buffer_release(buffer);
1903 binder_transaction_buffer_release(proc, buffer, NULL);
1904 binder_free_buf(proc, buffer);
1908 case BC_TRANSACTION:
1910 struct binder_transaction_data tr;
1912 if (copy_from_user(&tr, ptr, sizeof(tr)))
1915 binder_transaction(proc, thread, &tr, cmd == BC_REPLY);
1919 case BC_REGISTER_LOOPER:
1920 binder_debug(BINDER_DEBUG_THREADS,
1921 "%d:%d BC_REGISTER_LOOPER\n",
1922 proc->pid, thread->pid);
1923 if (thread->looper & BINDER_LOOPER_STATE_ENTERED) {
1924 thread->looper |= BINDER_LOOPER_STATE_INVALID;
1925 binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n",
1926 proc->pid, thread->pid);
1927 } else if (proc->requested_threads == 0) {
1928 thread->looper |= BINDER_LOOPER_STATE_INVALID;
1929 binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n",
1930 proc->pid, thread->pid);
1932 proc->requested_threads--;
1933 proc->requested_threads_started++;
1935 thread->looper |= BINDER_LOOPER_STATE_REGISTERED;
1937 case BC_ENTER_LOOPER:
1938 binder_debug(BINDER_DEBUG_THREADS,
1939 "%d:%d BC_ENTER_LOOPER\n",
1940 proc->pid, thread->pid);
1941 if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) {
1942 thread->looper |= BINDER_LOOPER_STATE_INVALID;
1943 binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n",
1944 proc->pid, thread->pid);
1946 thread->looper |= BINDER_LOOPER_STATE_ENTERED;
1948 case BC_EXIT_LOOPER:
1949 binder_debug(BINDER_DEBUG_THREADS,
1950 "%d:%d BC_EXIT_LOOPER\n",
1951 proc->pid, thread->pid);
1952 thread->looper |= BINDER_LOOPER_STATE_EXITED;
1955 case BC_REQUEST_DEATH_NOTIFICATION:
1956 case BC_CLEAR_DEATH_NOTIFICATION: {
1958 binder_uintptr_t cookie;
1959 struct binder_ref *ref;
1960 struct binder_ref_death *death;
1962 if (get_user(target, (uint32_t __user *)ptr))
1964 ptr += sizeof(uint32_t);
1965 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
1967 ptr += sizeof(binder_uintptr_t);
1968 ref = binder_get_ref(proc, target);
1970 binder_user_error("%d:%d %s invalid ref %d\n",
1971 proc->pid, thread->pid,
1972 cmd == BC_REQUEST_DEATH_NOTIFICATION ?
1973 "BC_REQUEST_DEATH_NOTIFICATION" :
1974 "BC_CLEAR_DEATH_NOTIFICATION",
1979 binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
1980 "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n",
1981 proc->pid, thread->pid,
1982 cmd == BC_REQUEST_DEATH_NOTIFICATION ?
1983 "BC_REQUEST_DEATH_NOTIFICATION" :
1984 "BC_CLEAR_DEATH_NOTIFICATION",
1985 (u64)cookie, ref->debug_id, ref->desc,
1986 ref->strong, ref->weak, ref->node->debug_id);
1988 if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
1990 binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n",
1991 proc->pid, thread->pid);
1994 death = kzalloc(sizeof(*death), GFP_KERNEL);
1995 if (death == NULL) {
1996 thread->return_error = BR_ERROR;
1997 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
1998 "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n",
1999 proc->pid, thread->pid);
2002 binder_stats_created(BINDER_STAT_DEATH);
2003 INIT_LIST_HEAD(&death->work.entry);
2004 death->cookie = cookie;
2006 if (ref->node->proc == NULL) {
2007 ref->death->work.type = BINDER_WORK_DEAD_BINDER;
2008 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2009 list_add_tail(&ref->death->work.entry, &thread->todo);
2011 list_add_tail(&ref->death->work.entry, &proc->todo);
2012 wake_up_interruptible(&proc->wait);
2016 if (ref->death == NULL) {
2017 binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n",
2018 proc->pid, thread->pid);
2022 if (death->cookie != cookie) {
2023 binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n",
2024 proc->pid, thread->pid,
2030 if (list_empty(&death->work.entry)) {
2031 death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
2032 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2033 list_add_tail(&death->work.entry, &thread->todo);
2035 list_add_tail(&death->work.entry, &proc->todo);
2036 wake_up_interruptible(&proc->wait);
2039 BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
2040 death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
2044 case BC_DEAD_BINDER_DONE: {
2045 struct binder_work *w;
2046 binder_uintptr_t cookie;
2047 struct binder_ref_death *death = NULL;
2049 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
2052 ptr += sizeof(void *);
2053 list_for_each_entry(w, &proc->delivered_death, entry) {
2054 struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);
2056 if (tmp_death->cookie == cookie) {
2061 binder_debug(BINDER_DEBUG_DEAD_BINDER,
2062 "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n",
2063 proc->pid, thread->pid, (u64)cookie,
2065 if (death == NULL) {
2066 binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n",
2067 proc->pid, thread->pid, (u64)cookie);
2071 list_del_init(&death->work.entry);
2072 if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
2073 death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
2074 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2075 list_add_tail(&death->work.entry, &thread->todo);
2077 list_add_tail(&death->work.entry, &proc->todo);
2078 wake_up_interruptible(&proc->wait);
2084 pr_err("%d:%d unknown command %d\n",
2085 proc->pid, thread->pid, cmd);
2088 *consumed = ptr - buffer;
2093 static void binder_stat_br(struct binder_proc *proc,
2094 struct binder_thread *thread, uint32_t cmd)
2096 trace_binder_return(cmd);
2097 if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) {
2098 binder_stats.br[_IOC_NR(cmd)]++;
2099 proc->stats.br[_IOC_NR(cmd)]++;
2100 thread->stats.br[_IOC_NR(cmd)]++;
2104 static int binder_has_proc_work(struct binder_proc *proc,
2105 struct binder_thread *thread)
2107 return !list_empty(&proc->todo) ||
2108 (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
2111 static int binder_has_thread_work(struct binder_thread *thread)
2113 return !list_empty(&thread->todo) || thread->return_error != BR_OK ||
2114 (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
2117 static int binder_thread_read(struct binder_proc *proc,
2118 struct binder_thread *thread,
2119 binder_uintptr_t binder_buffer, size_t size,
2120 binder_size_t *consumed, int non_block)
2122 void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
2123 void __user *ptr = buffer + *consumed;
2124 void __user *end = buffer + size;
2127 int wait_for_proc_work;
2129 if (*consumed == 0) {
2130 if (put_user(BR_NOOP, (uint32_t __user *)ptr))
2132 ptr += sizeof(uint32_t);
2136 wait_for_proc_work = thread->transaction_stack == NULL &&
2137 list_empty(&thread->todo);
2139 if (thread->return_error != BR_OK && ptr < end) {
2140 if (thread->return_error2 != BR_OK) {
2141 if (put_user(thread->return_error2, (uint32_t __user *)ptr))
2143 ptr += sizeof(uint32_t);
2144 binder_stat_br(proc, thread, thread->return_error2);
2147 thread->return_error2 = BR_OK;
2149 if (put_user(thread->return_error, (uint32_t __user *)ptr))
2151 ptr += sizeof(uint32_t);
2152 binder_stat_br(proc, thread, thread->return_error);
2153 thread->return_error = BR_OK;
2158 thread->looper |= BINDER_LOOPER_STATE_WAITING;
2159 if (wait_for_proc_work)
2160 proc->ready_threads++;
2162 binder_unlock(__func__);
2164 trace_binder_wait_for_work(wait_for_proc_work,
2165 !!thread->transaction_stack,
2166 !list_empty(&thread->todo));
2167 if (wait_for_proc_work) {
2168 if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
2169 BINDER_LOOPER_STATE_ENTERED))) {
2170 binder_user_error("%d:%d ERROR: Thread waiting for process work before calling BC_REGISTER_LOOPER or BC_ENTER_LOOPER (state %x)\n",
2171 proc->pid, thread->pid, thread->looper);
2172 wait_event_interruptible(binder_user_error_wait,
2173 binder_stop_on_user_error < 2);
2175 binder_set_nice(proc->default_priority);
2177 if (!binder_has_proc_work(proc, thread))
2180 ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread));
2183 if (!binder_has_thread_work(thread))
2186 ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread));
2189 binder_lock(__func__);
2191 if (wait_for_proc_work)
2192 proc->ready_threads--;
2193 thread->looper &= ~BINDER_LOOPER_STATE_WAITING;
2200 struct binder_transaction_data tr;
2201 struct binder_work *w;
2202 struct binder_transaction *t = NULL;
2204 if (!list_empty(&thread->todo)) {
2205 w = list_first_entry(&thread->todo, struct binder_work,
2207 } else if (!list_empty(&proc->todo) && wait_for_proc_work) {
2208 w = list_first_entry(&proc->todo, struct binder_work,
2212 if (ptr - buffer == 4 &&
2213 !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN))
2218 if (end - ptr < sizeof(tr) + 4)
2222 case BINDER_WORK_TRANSACTION: {
2223 t = container_of(w, struct binder_transaction, work);
2225 case BINDER_WORK_TRANSACTION_COMPLETE: {
2226 cmd = BR_TRANSACTION_COMPLETE;
2227 if (put_user(cmd, (uint32_t __user *)ptr))
2229 ptr += sizeof(uint32_t);
2231 binder_stat_br(proc, thread, cmd);
2232 binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE,
2233 "%d:%d BR_TRANSACTION_COMPLETE\n",
2234 proc->pid, thread->pid);
2236 list_del(&w->entry);
2238 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
2240 case BINDER_WORK_NODE: {
2241 struct binder_node *node = container_of(w, struct binder_node, work);
2242 uint32_t cmd = BR_NOOP;
2243 const char *cmd_name;
2244 int strong = node->internal_strong_refs || node->local_strong_refs;
2245 int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong;
2247 if (weak && !node->has_weak_ref) {
2249 cmd_name = "BR_INCREFS";
2250 node->has_weak_ref = 1;
2251 node->pending_weak_ref = 1;
2252 node->local_weak_refs++;
2253 } else if (strong && !node->has_strong_ref) {
2255 cmd_name = "BR_ACQUIRE";
2256 node->has_strong_ref = 1;
2257 node->pending_strong_ref = 1;
2258 node->local_strong_refs++;
2259 } else if (!strong && node->has_strong_ref) {
2261 cmd_name = "BR_RELEASE";
2262 node->has_strong_ref = 0;
2263 } else if (!weak && node->has_weak_ref) {
2265 cmd_name = "BR_DECREFS";
2266 node->has_weak_ref = 0;
2268 if (cmd != BR_NOOP) {
2269 if (put_user(cmd, (uint32_t __user *)ptr))
2271 ptr += sizeof(uint32_t);
2272 if (put_user(node->ptr,
2273 (binder_uintptr_t __user *)ptr))
2275 ptr += sizeof(binder_uintptr_t);
2276 if (put_user(node->cookie,
2277 (binder_uintptr_t __user *)ptr))
2279 ptr += sizeof(binder_uintptr_t);
2281 binder_stat_br(proc, thread, cmd);
2282 binder_debug(BINDER_DEBUG_USER_REFS,
2283 "%d:%d %s %d u%016llx c%016llx\n",
2284 proc->pid, thread->pid, cmd_name,
2286 (u64)node->ptr, (u64)node->cookie);
2288 list_del_init(&w->entry);
2289 if (!weak && !strong) {
2290 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
2291 "%d:%d node %d u%016llx c%016llx deleted\n",
2292 proc->pid, thread->pid,
2296 rb_erase(&node->rb_node, &proc->nodes);
2298 binder_stats_deleted(BINDER_STAT_NODE);
2300 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
2301 "%d:%d node %d u%016llx c%016llx state unchanged\n",
2302 proc->pid, thread->pid,
2309 case BINDER_WORK_DEAD_BINDER:
2310 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
2311 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
2312 struct binder_ref_death *death;
2315 death = container_of(w, struct binder_ref_death, work);
2316 if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
2317 cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
2319 cmd = BR_DEAD_BINDER;
2320 if (put_user(cmd, (uint32_t __user *)ptr))
2322 ptr += sizeof(uint32_t);
2323 if (put_user(death->cookie,
2324 (binder_uintptr_t __user *)ptr))
2326 ptr += sizeof(binder_uintptr_t);
2327 binder_stat_br(proc, thread, cmd);
2328 binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
2329 "%d:%d %s %016llx\n",
2330 proc->pid, thread->pid,
2331 cmd == BR_DEAD_BINDER ?
2333 "BR_CLEAR_DEATH_NOTIFICATION_DONE",
2334 (u64)death->cookie);
2336 if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
2337 list_del(&w->entry);
2339 binder_stats_deleted(BINDER_STAT_DEATH);
2341 list_move(&w->entry, &proc->delivered_death);
2342 if (cmd == BR_DEAD_BINDER)
2343 goto done; /* DEAD_BINDER notifications can cause transactions */
2350 BUG_ON(t->buffer == NULL);
2351 if (t->buffer->target_node) {
2352 struct binder_node *target_node = t->buffer->target_node;
2354 tr.target.ptr = target_node->ptr;
2355 tr.cookie = target_node->cookie;
2356 t->saved_priority = task_nice(current);
2357 if (t->priority < target_node->min_priority &&
2358 !(t->flags & TF_ONE_WAY))
2359 binder_set_nice(t->priority);
2360 else if (!(t->flags & TF_ONE_WAY) ||
2361 t->saved_priority > target_node->min_priority)
2362 binder_set_nice(target_node->min_priority);
2363 cmd = BR_TRANSACTION;
2370 tr.flags = t->flags;
2371 tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid);
2374 struct task_struct *sender = t->from->proc->tsk;
2376 tr.sender_pid = task_tgid_nr_ns(sender,
2377 task_active_pid_ns(current));
2382 tr.data_size = t->buffer->data_size;
2383 tr.offsets_size = t->buffer->offsets_size;
2384 tr.data.ptr.buffer = (binder_uintptr_t)(
2385 (uintptr_t)t->buffer->data +
2386 proc->user_buffer_offset);
2387 tr.data.ptr.offsets = tr.data.ptr.buffer +
2388 ALIGN(t->buffer->data_size,
2391 if (put_user(cmd, (uint32_t __user *)ptr))
2393 ptr += sizeof(uint32_t);
2394 if (copy_to_user(ptr, &tr, sizeof(tr)))
2398 trace_binder_transaction_received(t);
2399 binder_stat_br(proc, thread, cmd);
2400 binder_debug(BINDER_DEBUG_TRANSACTION,
2401 "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n",
2402 proc->pid, thread->pid,
2403 (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
2405 t->debug_id, t->from ? t->from->proc->pid : 0,
2406 t->from ? t->from->pid : 0, cmd,
2407 t->buffer->data_size, t->buffer->offsets_size,
2408 (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets);
2410 list_del(&t->work.entry);
2411 t->buffer->allow_user_free = 1;
2412 if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
2413 t->to_parent = thread->transaction_stack;
2414 t->to_thread = thread;
2415 thread->transaction_stack = t;
2417 t->buffer->transaction = NULL;
2419 binder_stats_deleted(BINDER_STAT_TRANSACTION);
2426 *consumed = ptr - buffer;
2427 if (proc->requested_threads + proc->ready_threads == 0 &&
2428 proc->requested_threads_started < proc->max_threads &&
2429 (thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
2430 BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
2431 /*spawn a new thread if we leave this out */) {
2432 proc->requested_threads++;
2433 binder_debug(BINDER_DEBUG_THREADS,
2434 "%d:%d BR_SPAWN_LOOPER\n",
2435 proc->pid, thread->pid);
2436 if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer))
2438 binder_stat_br(proc, thread, BR_SPAWN_LOOPER);
2443 static void binder_release_work(struct list_head *list)
2445 struct binder_work *w;
2447 while (!list_empty(list)) {
2448 w = list_first_entry(list, struct binder_work, entry);
2449 list_del_init(&w->entry);
2451 case BINDER_WORK_TRANSACTION: {
2452 struct binder_transaction *t;
2454 t = container_of(w, struct binder_transaction, work);
2455 if (t->buffer->target_node &&
2456 !(t->flags & TF_ONE_WAY)) {
2457 binder_send_failed_reply(t, BR_DEAD_REPLY);
2459 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
2460 "undelivered transaction %d\n",
2462 t->buffer->transaction = NULL;
2464 binder_stats_deleted(BINDER_STAT_TRANSACTION);
2467 case BINDER_WORK_TRANSACTION_COMPLETE: {
2468 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
2469 "undelivered TRANSACTION_COMPLETE\n");
2471 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
2473 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
2474 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
2475 struct binder_ref_death *death;
2477 death = container_of(w, struct binder_ref_death, work);
2478 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
2479 "undelivered death notification, %016llx\n",
2480 (u64)death->cookie);
2482 binder_stats_deleted(BINDER_STAT_DEATH);
2485 pr_err("unexpected work type, %d, not freed\n",
2493 static struct binder_thread *binder_get_thread(struct binder_proc *proc)
2495 struct binder_thread *thread = NULL;
2496 struct rb_node *parent = NULL;
2497 struct rb_node **p = &proc->threads.rb_node;
2501 thread = rb_entry(parent, struct binder_thread, rb_node);
2503 if (current->pid < thread->pid)
2505 else if (current->pid > thread->pid)
2506 p = &(*p)->rb_right;
2511 thread = kzalloc(sizeof(*thread), GFP_KERNEL);
2514 binder_stats_created(BINDER_STAT_THREAD);
2515 thread->proc = proc;
2516 thread->pid = current->pid;
2517 init_waitqueue_head(&thread->wait);
2518 INIT_LIST_HEAD(&thread->todo);
2519 rb_link_node(&thread->rb_node, parent, p);
2520 rb_insert_color(&thread->rb_node, &proc->threads);
2521 thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
2522 thread->return_error = BR_OK;
2523 thread->return_error2 = BR_OK;
2528 static int binder_free_thread(struct binder_proc *proc,
2529 struct binder_thread *thread)
2531 struct binder_transaction *t;
2532 struct binder_transaction *send_reply = NULL;
2533 int active_transactions = 0;
2535 rb_erase(&thread->rb_node, &proc->threads);
2536 t = thread->transaction_stack;
2537 if (t && t->to_thread == thread)
2540 active_transactions++;
2541 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
2542 "release %d:%d transaction %d %s, still active\n",
2543 proc->pid, thread->pid,
2545 (t->to_thread == thread) ? "in" : "out");
2547 if (t->to_thread == thread) {
2549 t->to_thread = NULL;
2551 t->buffer->transaction = NULL;
2555 } else if (t->from == thread) {
2562 binder_send_failed_reply(send_reply, BR_DEAD_REPLY);
2563 binder_release_work(&thread->todo);
2565 binder_stats_deleted(BINDER_STAT_THREAD);
2566 return active_transactions;
2569 static unsigned int binder_poll(struct file *filp,
2570 struct poll_table_struct *wait)
2572 struct binder_proc *proc = filp->private_data;
2573 struct binder_thread *thread = NULL;
2574 int wait_for_proc_work;
2576 binder_lock(__func__);
2578 thread = binder_get_thread(proc);
2580 wait_for_proc_work = thread->transaction_stack == NULL &&
2581 list_empty(&thread->todo) && thread->return_error == BR_OK;
2583 binder_unlock(__func__);
2585 if (wait_for_proc_work) {
2586 if (binder_has_proc_work(proc, thread))
2588 poll_wait(filp, &proc->wait, wait);
2589 if (binder_has_proc_work(proc, thread))
2592 if (binder_has_thread_work(thread))
2594 poll_wait(filp, &thread->wait, wait);
2595 if (binder_has_thread_work(thread))
2601 static int binder_ioctl_write_read(struct file *filp,
2602 unsigned int cmd, unsigned long arg,
2603 struct binder_thread *thread)
2606 struct binder_proc *proc = filp->private_data;
2607 unsigned int size = _IOC_SIZE(cmd);
2608 void __user *ubuf = (void __user *)arg;
2609 struct binder_write_read bwr;
2611 if (size != sizeof(struct binder_write_read)) {
2615 if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
2619 binder_debug(BINDER_DEBUG_READ_WRITE,
2620 "%d:%d write %lld at %016llx, read %lld at %016llx\n",
2621 proc->pid, thread->pid,
2622 (u64)bwr.write_size, (u64)bwr.write_buffer,
2623 (u64)bwr.read_size, (u64)bwr.read_buffer);
2625 if (bwr.write_size > 0) {
2626 ret = binder_thread_write(proc, thread,
2629 &bwr.write_consumed);
2630 trace_binder_write_done(ret);
2632 bwr.read_consumed = 0;
2633 if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
2638 if (bwr.read_size > 0) {
2639 ret = binder_thread_read(proc, thread, bwr.read_buffer,
2642 filp->f_flags & O_NONBLOCK);
2643 trace_binder_read_done(ret);
2644 if (!list_empty(&proc->todo))
2645 wake_up_interruptible(&proc->wait);
2647 if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
2652 binder_debug(BINDER_DEBUG_READ_WRITE,
2653 "%d:%d wrote %lld of %lld, read return %lld of %lld\n",
2654 proc->pid, thread->pid,
2655 (u64)bwr.write_consumed, (u64)bwr.write_size,
2656 (u64)bwr.read_consumed, (u64)bwr.read_size);
2657 if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
2665 static int binder_ioctl_set_ctx_mgr(struct file *filp)
2668 struct binder_proc *proc = filp->private_data;
2669 kuid_t curr_euid = current_euid();
2671 if (binder_context_mgr_node != NULL) {
2672 pr_err("BINDER_SET_CONTEXT_MGR already set\n");
2676 if (uid_valid(binder_context_mgr_uid)) {
2677 if (!uid_eq(binder_context_mgr_uid, curr_euid)) {
2678 pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
2679 from_kuid(&init_user_ns, curr_euid),
2680 from_kuid(&init_user_ns,
2681 binder_context_mgr_uid));
2686 binder_context_mgr_uid = curr_euid;
2688 binder_context_mgr_node = binder_new_node(proc, 0, 0);
2689 if (binder_context_mgr_node == NULL) {
2693 binder_context_mgr_node->local_weak_refs++;
2694 binder_context_mgr_node->local_strong_refs++;
2695 binder_context_mgr_node->has_strong_ref = 1;
2696 binder_context_mgr_node->has_weak_ref = 1;
2701 static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
2704 struct binder_proc *proc = filp->private_data;
2705 struct binder_thread *thread;
2706 unsigned int size = _IOC_SIZE(cmd);
2707 void __user *ubuf = (void __user *)arg;
2709 /*pr_info("binder_ioctl: %d:%d %x %lx\n",
2710 proc->pid, current->pid, cmd, arg);*/
2712 trace_binder_ioctl(cmd, arg);
2714 ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
2718 binder_lock(__func__);
2719 thread = binder_get_thread(proc);
2720 if (thread == NULL) {
2726 case BINDER_WRITE_READ:
2727 ret = binder_ioctl_write_read(filp, cmd, arg, thread);
2731 case BINDER_SET_MAX_THREADS:
2732 if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
2737 case BINDER_SET_CONTEXT_MGR:
2738 ret = binder_ioctl_set_ctx_mgr(filp);
2742 case BINDER_THREAD_EXIT:
2743 binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n",
2744 proc->pid, thread->pid);
2745 binder_free_thread(proc, thread);
2748 case BINDER_VERSION: {
2749 struct binder_version __user *ver = ubuf;
2751 if (size != sizeof(struct binder_version)) {
2755 if (put_user(BINDER_CURRENT_PROTOCOL_VERSION,
2756 &ver->protocol_version)) {
2769 thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN;
2770 binder_unlock(__func__);
2771 wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
2772 if (ret && ret != -ERESTARTSYS)
2773 pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret);
2775 trace_binder_ioctl_done(ret);
2779 static void binder_vma_open(struct vm_area_struct *vma)
2781 struct binder_proc *proc = vma->vm_private_data;
2783 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2784 "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
2785 proc->pid, vma->vm_start, vma->vm_end,
2786 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2787 (unsigned long)pgprot_val(vma->vm_page_prot));
2790 static void binder_vma_close(struct vm_area_struct *vma)
2792 struct binder_proc *proc = vma->vm_private_data;
2794 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2795 "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
2796 proc->pid, vma->vm_start, vma->vm_end,
2797 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2798 (unsigned long)pgprot_val(vma->vm_page_prot));
2800 proc->vma_vm_mm = NULL;
2801 binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES);
2804 static int binder_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
2806 return VM_FAULT_SIGBUS;
2809 static struct vm_operations_struct binder_vm_ops = {
2810 .open = binder_vma_open,
2811 .close = binder_vma_close,
2812 .fault = binder_vm_fault,
2815 static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
2818 struct vm_struct *area;
2819 struct binder_proc *proc = filp->private_data;
2820 const char *failure_string;
2821 struct binder_buffer *buffer;
2823 if (proc->tsk != current)
2826 if ((vma->vm_end - vma->vm_start) > SZ_4M)
2827 vma->vm_end = vma->vm_start + SZ_4M;
2829 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2830 "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n",
2831 proc->pid, vma->vm_start, vma->vm_end,
2832 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2833 (unsigned long)pgprot_val(vma->vm_page_prot));
2835 if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
2837 failure_string = "bad vm_flags";
2840 vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE;
2842 mutex_lock(&binder_mmap_lock);
2845 failure_string = "already mapped";
2846 goto err_already_mapped;
2849 area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP);
2852 failure_string = "get_vm_area";
2853 goto err_get_vm_area_failed;
2855 proc->buffer = area->addr;
2856 proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer;
2857 mutex_unlock(&binder_mmap_lock);
2859 #ifdef CONFIG_CPU_CACHE_VIPT
2860 if (cache_is_vipt_aliasing()) {
2861 while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) {
2862 pr_info("binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);
2863 vma->vm_start += PAGE_SIZE;
2867 proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL);
2868 if (proc->pages == NULL) {
2870 failure_string = "alloc page array";
2871 goto err_alloc_pages_failed;
2873 proc->buffer_size = vma->vm_end - vma->vm_start;
2875 vma->vm_ops = &binder_vm_ops;
2876 vma->vm_private_data = proc;
2878 if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) {
2880 failure_string = "alloc small buf";
2881 goto err_alloc_small_buf_failed;
2883 buffer = proc->buffer;
2884 INIT_LIST_HEAD(&proc->buffers);
2885 list_add(&buffer->entry, &proc->buffers);
2887 binder_insert_free_buffer(proc, buffer);
2888 proc->free_async_space = proc->buffer_size / 2;
2890 proc->files = get_files_struct(current);
2892 proc->vma_vm_mm = vma->vm_mm;
2894 /*pr_info("binder_mmap: %d %lx-%lx maps %p\n",
2895 proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/
2898 err_alloc_small_buf_failed:
2901 err_alloc_pages_failed:
2902 mutex_lock(&binder_mmap_lock);
2903 vfree(proc->buffer);
2904 proc->buffer = NULL;
2905 err_get_vm_area_failed:
2907 mutex_unlock(&binder_mmap_lock);
2909 pr_err("binder_mmap: %d %lx-%lx %s failed %d\n",
2910 proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
2914 static int binder_open(struct inode *nodp, struct file *filp)
2916 struct binder_proc *proc;
2918 binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n",
2919 current->group_leader->pid, current->pid);
2921 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
2924 get_task_struct(current);
2925 proc->tsk = current;
2926 INIT_LIST_HEAD(&proc->todo);
2927 init_waitqueue_head(&proc->wait);
2928 proc->default_priority = task_nice(current);
2930 binder_lock(__func__);
2932 binder_stats_created(BINDER_STAT_PROC);
2933 hlist_add_head(&proc->proc_node, &binder_procs);
2934 proc->pid = current->group_leader->pid;
2935 INIT_LIST_HEAD(&proc->delivered_death);
2936 filp->private_data = proc;
2938 binder_unlock(__func__);
2940 if (binder_debugfs_dir_entry_proc) {
2943 snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
2944 proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO,
2945 binder_debugfs_dir_entry_proc, proc, &binder_proc_fops);
2951 static int binder_flush(struct file *filp, fl_owner_t id)
2953 struct binder_proc *proc = filp->private_data;
2955 binder_defer_work(proc, BINDER_DEFERRED_FLUSH);
2960 static void binder_deferred_flush(struct binder_proc *proc)
2965 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
2966 struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
2968 thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
2969 if (thread->looper & BINDER_LOOPER_STATE_WAITING) {
2970 wake_up_interruptible(&thread->wait);
2974 wake_up_interruptible_all(&proc->wait);
2976 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2977 "binder_flush: %d woke %d threads\n", proc->pid,
2981 static int binder_release(struct inode *nodp, struct file *filp)
2983 struct binder_proc *proc = filp->private_data;
2985 debugfs_remove(proc->debugfs_entry);
2986 binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
2991 static int binder_node_release(struct binder_node *node, int refs)
2993 struct binder_ref *ref;
2996 list_del_init(&node->work.entry);
2997 binder_release_work(&node->async_todo);
2999 if (hlist_empty(&node->refs)) {
3001 binder_stats_deleted(BINDER_STAT_NODE);
3007 node->local_strong_refs = 0;
3008 node->local_weak_refs = 0;
3009 hlist_add_head(&node->dead_node, &binder_dead_nodes);
3011 hlist_for_each_entry(ref, &node->refs, node_entry) {
3019 if (list_empty(&ref->death->work.entry)) {
3020 ref->death->work.type = BINDER_WORK_DEAD_BINDER;
3021 list_add_tail(&ref->death->work.entry,
3023 wake_up_interruptible(&ref->proc->wait);
3028 binder_debug(BINDER_DEBUG_DEAD_BINDER,
3029 "node %d now dead, refs %d, death %d\n",
3030 node->debug_id, refs, death);
3035 static void binder_deferred_release(struct binder_proc *proc)
3037 struct binder_transaction *t;
3039 int threads, nodes, incoming_refs, outgoing_refs, buffers,
3040 active_transactions, page_count;
3043 BUG_ON(proc->files);
3045 hlist_del(&proc->proc_node);
3047 if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
3048 binder_debug(BINDER_DEBUG_DEAD_BINDER,
3049 "%s: %d context_mgr_node gone\n",
3050 __func__, proc->pid);
3051 binder_context_mgr_node = NULL;
3055 active_transactions = 0;
3056 while ((n = rb_first(&proc->threads))) {
3057 struct binder_thread *thread;
3059 thread = rb_entry(n, struct binder_thread, rb_node);
3061 active_transactions += binder_free_thread(proc, thread);
3066 while ((n = rb_first(&proc->nodes))) {
3067 struct binder_node *node;
3069 node = rb_entry(n, struct binder_node, rb_node);
3071 rb_erase(&node->rb_node, &proc->nodes);
3072 incoming_refs = binder_node_release(node, incoming_refs);
3076 while ((n = rb_first(&proc->refs_by_desc))) {
3077 struct binder_ref *ref;
3079 ref = rb_entry(n, struct binder_ref, rb_node_desc);
3081 binder_delete_ref(ref);
3084 binder_release_work(&proc->todo);
3085 binder_release_work(&proc->delivered_death);
3088 while ((n = rb_first(&proc->allocated_buffers))) {
3089 struct binder_buffer *buffer;
3091 buffer = rb_entry(n, struct binder_buffer, rb_node);
3093 t = buffer->transaction;
3096 buffer->transaction = NULL;
3097 pr_err("release proc %d, transaction %d, not freed\n",
3098 proc->pid, t->debug_id);
3102 binder_free_buf(proc, buffer);
3106 binder_stats_deleted(BINDER_STAT_PROC);
3112 for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) {
3115 if (!proc->pages[i])
3118 page_addr = proc->buffer + i * PAGE_SIZE;
3119 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
3120 "%s: %d: page %d at %p not freed\n",
3121 __func__, proc->pid, i, page_addr);
3122 unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
3123 __free_page(proc->pages[i]);
3127 vfree(proc->buffer);
3130 put_task_struct(proc->tsk);
3132 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
3133 "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n",
3134 __func__, proc->pid, threads, nodes, incoming_refs,
3135 outgoing_refs, active_transactions, buffers, page_count);
3140 static void binder_deferred_func(struct work_struct *work)
3142 struct binder_proc *proc;
3143 struct files_struct *files;
3148 binder_lock(__func__);
3149 mutex_lock(&binder_deferred_lock);
3150 if (!hlist_empty(&binder_deferred_list)) {
3151 proc = hlist_entry(binder_deferred_list.first,
3152 struct binder_proc, deferred_work_node);
3153 hlist_del_init(&proc->deferred_work_node);
3154 defer = proc->deferred_work;
3155 proc->deferred_work = 0;
3160 mutex_unlock(&binder_deferred_lock);
3163 if (defer & BINDER_DEFERRED_PUT_FILES) {
3164 files = proc->files;
3169 if (defer & BINDER_DEFERRED_FLUSH)
3170 binder_deferred_flush(proc);
3172 if (defer & BINDER_DEFERRED_RELEASE)
3173 binder_deferred_release(proc); /* frees proc */
3175 binder_unlock(__func__);
3177 put_files_struct(files);
3180 static DECLARE_WORK(binder_deferred_work, binder_deferred_func);
3183 binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer)
3185 mutex_lock(&binder_deferred_lock);
3186 proc->deferred_work |= defer;
3187 if (hlist_unhashed(&proc->deferred_work_node)) {
3188 hlist_add_head(&proc->deferred_work_node,
3189 &binder_deferred_list);
3190 queue_work(binder_deferred_workqueue, &binder_deferred_work);
3192 mutex_unlock(&binder_deferred_lock);
3195 static void print_binder_transaction(struct seq_file *m, const char *prefix,
3196 struct binder_transaction *t)
3199 "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d",
3200 prefix, t->debug_id, t,
3201 t->from ? t->from->proc->pid : 0,
3202 t->from ? t->from->pid : 0,
3203 t->to_proc ? t->to_proc->pid : 0,
3204 t->to_thread ? t->to_thread->pid : 0,
3205 t->code, t->flags, t->priority, t->need_reply);
3206 if (t->buffer == NULL) {
3207 seq_puts(m, " buffer free\n");
3210 if (t->buffer->target_node)
3211 seq_printf(m, " node %d",
3212 t->buffer->target_node->debug_id);
3213 seq_printf(m, " size %zd:%zd data %p\n",
3214 t->buffer->data_size, t->buffer->offsets_size,
3218 static void print_binder_buffer(struct seq_file *m, const char *prefix,
3219 struct binder_buffer *buffer)
3221 seq_printf(m, "%s %d: %p size %zd:%zd %s\n",
3222 prefix, buffer->debug_id, buffer->data,
3223 buffer->data_size, buffer->offsets_size,
3224 buffer->transaction ? "active" : "delivered");
3227 static void print_binder_work(struct seq_file *m, const char *prefix,
3228 const char *transaction_prefix,
3229 struct binder_work *w)
3231 struct binder_node *node;
3232 struct binder_transaction *t;
3235 case BINDER_WORK_TRANSACTION:
3236 t = container_of(w, struct binder_transaction, work);
3237 print_binder_transaction(m, transaction_prefix, t);
3239 case BINDER_WORK_TRANSACTION_COMPLETE:
3240 seq_printf(m, "%stransaction complete\n", prefix);
3242 case BINDER_WORK_NODE:
3243 node = container_of(w, struct binder_node, work);
3244 seq_printf(m, "%snode work %d: u%016llx c%016llx\n",
3245 prefix, node->debug_id,
3246 (u64)node->ptr, (u64)node->cookie);
3248 case BINDER_WORK_DEAD_BINDER:
3249 seq_printf(m, "%shas dead binder\n", prefix);
3251 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
3252 seq_printf(m, "%shas cleared dead binder\n", prefix);
3254 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
3255 seq_printf(m, "%shas cleared death notification\n", prefix);
3258 seq_printf(m, "%sunknown work: type %d\n", prefix, w->type);
3263 static void print_binder_thread(struct seq_file *m,
3264 struct binder_thread *thread,
3267 struct binder_transaction *t;
3268 struct binder_work *w;
3269 size_t start_pos = m->count;
3272 seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper);
3273 header_pos = m->count;
3274 t = thread->transaction_stack;
3276 if (t->from == thread) {
3277 print_binder_transaction(m,
3278 " outgoing transaction", t);
3280 } else if (t->to_thread == thread) {
3281 print_binder_transaction(m,
3282 " incoming transaction", t);
3285 print_binder_transaction(m, " bad transaction", t);
3289 list_for_each_entry(w, &thread->todo, entry) {
3290 print_binder_work(m, " ", " pending transaction", w);
3292 if (!print_always && m->count == header_pos)
3293 m->count = start_pos;
3296 static void print_binder_node(struct seq_file *m, struct binder_node *node)
3298 struct binder_ref *ref;
3299 struct binder_work *w;
3303 hlist_for_each_entry(ref, &node->refs, node_entry)
3306 seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d",
3307 node->debug_id, (u64)node->ptr, (u64)node->cookie,
3308 node->has_strong_ref, node->has_weak_ref,
3309 node->local_strong_refs, node->local_weak_refs,
3310 node->internal_strong_refs, count);
3312 seq_puts(m, " proc");
3313 hlist_for_each_entry(ref, &node->refs, node_entry)
3314 seq_printf(m, " %d", ref->proc->pid);
3317 list_for_each_entry(w, &node->async_todo, entry)
3318 print_binder_work(m, " ",
3319 " pending async transaction", w);
3322 static void print_binder_ref(struct seq_file *m, struct binder_ref *ref)
3324 seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n",
3325 ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ",
3326 ref->node->debug_id, ref->strong, ref->weak, ref->death);
3329 static void print_binder_proc(struct seq_file *m,
3330 struct binder_proc *proc, int print_all)
3332 struct binder_work *w;
3334 size_t start_pos = m->count;
3337 seq_printf(m, "proc %d\n", proc->pid);
3338 header_pos = m->count;
3340 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
3341 print_binder_thread(m, rb_entry(n, struct binder_thread,
3342 rb_node), print_all);
3343 for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
3344 struct binder_node *node = rb_entry(n, struct binder_node,
3346 if (print_all || node->has_async_transaction)
3347 print_binder_node(m, node);
3350 for (n = rb_first(&proc->refs_by_desc);
3353 print_binder_ref(m, rb_entry(n, struct binder_ref,
3356 for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
3357 print_binder_buffer(m, " buffer",
3358 rb_entry(n, struct binder_buffer, rb_node));
3359 list_for_each_entry(w, &proc->todo, entry)
3360 print_binder_work(m, " ", " pending transaction", w);
3361 list_for_each_entry(w, &proc->delivered_death, entry) {
3362 seq_puts(m, " has delivered dead binder\n");
3365 if (!print_all && m->count == header_pos)
3366 m->count = start_pos;
3369 static const char * const binder_return_strings[] = {
3374 "BR_ACQUIRE_RESULT",
3376 "BR_TRANSACTION_COMPLETE",
3381 "BR_ATTEMPT_ACQUIRE",
3386 "BR_CLEAR_DEATH_NOTIFICATION_DONE",
3390 static const char * const binder_command_strings[] = {
3393 "BC_ACQUIRE_RESULT",
3401 "BC_ATTEMPT_ACQUIRE",
3402 "BC_REGISTER_LOOPER",
3405 "BC_REQUEST_DEATH_NOTIFICATION",
3406 "BC_CLEAR_DEATH_NOTIFICATION",
3407 "BC_DEAD_BINDER_DONE"
3410 static const char * const binder_objstat_strings[] = {
3417 "transaction_complete"
3420 static void print_binder_stats(struct seq_file *m, const char *prefix,
3421 struct binder_stats *stats)
3425 BUILD_BUG_ON(ARRAY_SIZE(stats->bc) !=
3426 ARRAY_SIZE(binder_command_strings));
3427 for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
3429 seq_printf(m, "%s%s: %d\n", prefix,
3430 binder_command_strings[i], stats->bc[i]);
3433 BUILD_BUG_ON(ARRAY_SIZE(stats->br) !=
3434 ARRAY_SIZE(binder_return_strings));
3435 for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
3437 seq_printf(m, "%s%s: %d\n", prefix,
3438 binder_return_strings[i], stats->br[i]);
3441 BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
3442 ARRAY_SIZE(binder_objstat_strings));
3443 BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
3444 ARRAY_SIZE(stats->obj_deleted));
3445 for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
3446 if (stats->obj_created[i] || stats->obj_deleted[i])
3447 seq_printf(m, "%s%s: active %d total %d\n", prefix,
3448 binder_objstat_strings[i],
3449 stats->obj_created[i] - stats->obj_deleted[i],
3450 stats->obj_created[i]);
3454 static void print_binder_proc_stats(struct seq_file *m,
3455 struct binder_proc *proc)
3457 struct binder_work *w;
3459 int count, strong, weak;
3461 seq_printf(m, "proc %d\n", proc->pid);
3463 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
3465 seq_printf(m, " threads: %d\n", count);
3466 seq_printf(m, " requested threads: %d+%d/%d\n"
3467 " ready threads %d\n"
3468 " free async space %zd\n", proc->requested_threads,
3469 proc->requested_threads_started, proc->max_threads,
3470 proc->ready_threads, proc->free_async_space);
3472 for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
3474 seq_printf(m, " nodes: %d\n", count);
3478 for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
3479 struct binder_ref *ref = rb_entry(n, struct binder_ref,
3482 strong += ref->strong;
3485 seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak);
3488 for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
3490 seq_printf(m, " buffers: %d\n", count);
3493 list_for_each_entry(w, &proc->todo, entry) {
3495 case BINDER_WORK_TRANSACTION:
3502 seq_printf(m, " pending transactions: %d\n", count);
3504 print_binder_stats(m, " ", &proc->stats);
3508 static int binder_state_show(struct seq_file *m, void *unused)
3510 struct binder_proc *proc;
3511 struct binder_node *node;
3512 int do_lock = !binder_debug_no_lock;
3515 binder_lock(__func__);
3517 seq_puts(m, "binder state:\n");
3519 if (!hlist_empty(&binder_dead_nodes))
3520 seq_puts(m, "dead nodes:\n");
3521 hlist_for_each_entry(node, &binder_dead_nodes, dead_node)
3522 print_binder_node(m, node);
3524 hlist_for_each_entry(proc, &binder_procs, proc_node)
3525 print_binder_proc(m, proc, 1);
3527 binder_unlock(__func__);
3531 static int binder_stats_show(struct seq_file *m, void *unused)
3533 struct binder_proc *proc;
3534 int do_lock = !binder_debug_no_lock;
3537 binder_lock(__func__);
3539 seq_puts(m, "binder stats:\n");
3541 print_binder_stats(m, "", &binder_stats);
3543 hlist_for_each_entry(proc, &binder_procs, proc_node)
3544 print_binder_proc_stats(m, proc);
3546 binder_unlock(__func__);
3550 static int binder_transactions_show(struct seq_file *m, void *unused)
3552 struct binder_proc *proc;
3553 int do_lock = !binder_debug_no_lock;
3556 binder_lock(__func__);
3558 seq_puts(m, "binder transactions:\n");
3559 hlist_for_each_entry(proc, &binder_procs, proc_node)
3560 print_binder_proc(m, proc, 0);
3562 binder_unlock(__func__);
3566 static int binder_proc_show(struct seq_file *m, void *unused)
3568 struct binder_proc *proc = m->private;
3569 int do_lock = !binder_debug_no_lock;
3572 binder_lock(__func__);
3573 seq_puts(m, "binder proc state:\n");
3574 print_binder_proc(m, proc, 1);
3576 binder_unlock(__func__);
3580 static void print_binder_transaction_log_entry(struct seq_file *m,
3581 struct binder_transaction_log_entry *e)
3584 "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n",
3585 e->debug_id, (e->call_type == 2) ? "reply" :
3586 ((e->call_type == 1) ? "async" : "call "), e->from_proc,
3587 e->from_thread, e->to_proc, e->to_thread, e->to_node,
3588 e->target_handle, e->data_size, e->offsets_size);
3591 static int binder_transaction_log_show(struct seq_file *m, void *unused)
3593 struct binder_transaction_log *log = m->private;
3597 for (i = log->next; i < ARRAY_SIZE(log->entry); i++)
3598 print_binder_transaction_log_entry(m, &log->entry[i]);
3600 for (i = 0; i < log->next; i++)
3601 print_binder_transaction_log_entry(m, &log->entry[i]);
3605 static const struct file_operations binder_fops = {
3606 .owner = THIS_MODULE,
3607 .poll = binder_poll,
3608 .unlocked_ioctl = binder_ioctl,
3609 .compat_ioctl = binder_ioctl,
3610 .mmap = binder_mmap,
3611 .open = binder_open,
3612 .flush = binder_flush,
3613 .release = binder_release,
3616 static struct miscdevice binder_miscdev = {
3617 .minor = MISC_DYNAMIC_MINOR,
3619 .fops = &binder_fops
3622 BINDER_DEBUG_ENTRY(state);
3623 BINDER_DEBUG_ENTRY(stats);
3624 BINDER_DEBUG_ENTRY(transactions);
3625 BINDER_DEBUG_ENTRY(transaction_log);
3627 static int __init binder_init(void)
3631 binder_deferred_workqueue = create_singlethread_workqueue("binder");
3632 if (!binder_deferred_workqueue)
3635 binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL);
3636 if (binder_debugfs_dir_entry_root)
3637 binder_debugfs_dir_entry_proc = debugfs_create_dir("proc",
3638 binder_debugfs_dir_entry_root);
3639 ret = misc_register(&binder_miscdev);
3640 if (binder_debugfs_dir_entry_root) {
3641 debugfs_create_file("state",
3643 binder_debugfs_dir_entry_root,
3645 &binder_state_fops);
3646 debugfs_create_file("stats",
3648 binder_debugfs_dir_entry_root,
3650 &binder_stats_fops);
3651 debugfs_create_file("transactions",
3653 binder_debugfs_dir_entry_root,
3655 &binder_transactions_fops);
3656 debugfs_create_file("transaction_log",
3658 binder_debugfs_dir_entry_root,
3659 &binder_transaction_log,
3660 &binder_transaction_log_fops);
3661 debugfs_create_file("failed_transaction_log",
3663 binder_debugfs_dir_entry_root,
3664 &binder_transaction_log_failed,
3665 &binder_transaction_log_fops);
3670 device_initcall(binder_init);
3672 #define CREATE_TRACE_POINTS
3673 #include "binder_trace.h"
3675 MODULE_LICENSE("GPL v2");