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>
41 #ifdef CONFIG_ANDROID_BINDER_IPC_32BIT
42 #define BINDER_IPC_32BIT 1
45 #include <uapi/linux/android/binder.h>
46 #include "binder_trace.h"
48 static DEFINE_MUTEX(binder_main_lock);
49 static DEFINE_MUTEX(binder_deferred_lock);
50 static DEFINE_MUTEX(binder_mmap_lock);
52 static HLIST_HEAD(binder_procs);
53 static HLIST_HEAD(binder_deferred_list);
54 static HLIST_HEAD(binder_dead_nodes);
56 static struct dentry *binder_debugfs_dir_entry_root;
57 static struct dentry *binder_debugfs_dir_entry_proc;
58 static struct binder_node *binder_context_mgr_node;
59 static kuid_t binder_context_mgr_uid = INVALID_UID;
60 static int binder_last_id;
61 static struct workqueue_struct *binder_deferred_workqueue;
63 #define BINDER_DEBUG_ENTRY(name) \
64 static int binder_##name##_open(struct inode *inode, struct file *file) \
66 return single_open(file, binder_##name##_show, inode->i_private); \
69 static const struct file_operations binder_##name##_fops = { \
70 .owner = THIS_MODULE, \
71 .open = binder_##name##_open, \
73 .llseek = seq_lseek, \
74 .release = single_release, \
77 static int binder_proc_show(struct seq_file *m, void *unused);
78 BINDER_DEBUG_ENTRY(proc);
80 /* This is only defined in include/asm-arm/sizes.h */
86 #define SZ_4M 0x400000
89 #define FORBIDDEN_MMAP_FLAGS (VM_WRITE)
91 #define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64)
94 BINDER_DEBUG_USER_ERROR = 1U << 0,
95 BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1,
96 BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2,
97 BINDER_DEBUG_OPEN_CLOSE = 1U << 3,
98 BINDER_DEBUG_DEAD_BINDER = 1U << 4,
99 BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5,
100 BINDER_DEBUG_READ_WRITE = 1U << 6,
101 BINDER_DEBUG_USER_REFS = 1U << 7,
102 BINDER_DEBUG_THREADS = 1U << 8,
103 BINDER_DEBUG_TRANSACTION = 1U << 9,
104 BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10,
105 BINDER_DEBUG_FREE_BUFFER = 1U << 11,
106 BINDER_DEBUG_INTERNAL_REFS = 1U << 12,
107 BINDER_DEBUG_BUFFER_ALLOC = 1U << 13,
108 BINDER_DEBUG_PRIORITY_CAP = 1U << 14,
109 BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15,
111 static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
112 BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
113 module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
115 static bool binder_debug_no_lock;
116 module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
118 static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
119 static int binder_stop_on_user_error;
121 static int binder_set_stop_on_user_error(const char *val,
122 struct kernel_param *kp)
126 ret = param_set_int(val, kp);
127 if (binder_stop_on_user_error < 2)
128 wake_up(&binder_user_error_wait);
131 module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
132 param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO);
134 #define binder_debug(mask, x...) \
136 if (binder_debug_mask & mask) \
140 #define binder_user_error(x...) \
142 if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
144 if (binder_stop_on_user_error) \
145 binder_stop_on_user_error = 2; \
148 enum binder_stat_types {
154 BINDER_STAT_TRANSACTION,
155 BINDER_STAT_TRANSACTION_COMPLETE,
159 struct binder_stats {
160 int br[_IOC_NR(BR_FAILED_REPLY) + 1];
161 int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
162 int obj_created[BINDER_STAT_COUNT];
163 int obj_deleted[BINDER_STAT_COUNT];
166 static struct binder_stats binder_stats;
168 static inline void binder_stats_deleted(enum binder_stat_types type)
170 binder_stats.obj_deleted[type]++;
173 static inline void binder_stats_created(enum binder_stat_types type)
175 binder_stats.obj_created[type]++;
178 struct binder_transaction_log_entry {
190 struct binder_transaction_log {
193 struct binder_transaction_log_entry entry[32];
195 static struct binder_transaction_log binder_transaction_log;
196 static struct binder_transaction_log binder_transaction_log_failed;
198 static struct binder_transaction_log_entry *binder_transaction_log_add(
199 struct binder_transaction_log *log)
201 struct binder_transaction_log_entry *e;
203 e = &log->entry[log->next];
204 memset(e, 0, sizeof(*e));
206 if (log->next == ARRAY_SIZE(log->entry)) {
214 struct list_head entry;
216 BINDER_WORK_TRANSACTION = 1,
217 BINDER_WORK_TRANSACTION_COMPLETE,
219 BINDER_WORK_DEAD_BINDER,
220 BINDER_WORK_DEAD_BINDER_AND_CLEAR,
221 BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
227 struct binder_work work;
229 struct rb_node rb_node;
230 struct hlist_node dead_node;
232 struct binder_proc *proc;
233 struct hlist_head refs;
234 int internal_strong_refs;
236 int local_strong_refs;
237 binder_uintptr_t ptr;
238 binder_uintptr_t cookie;
239 unsigned has_strong_ref:1;
240 unsigned pending_strong_ref:1;
241 unsigned has_weak_ref:1;
242 unsigned pending_weak_ref:1;
243 unsigned has_async_transaction:1;
244 unsigned accept_fds:1;
245 unsigned min_priority:8;
246 struct list_head async_todo;
249 struct binder_ref_death {
250 struct binder_work work;
251 binder_uintptr_t cookie;
255 /* Lookups needed: */
256 /* node + proc => ref (transaction) */
257 /* desc + proc => ref (transaction, inc/dec ref) */
258 /* node => refs + procs (proc exit) */
260 struct rb_node rb_node_desc;
261 struct rb_node rb_node_node;
262 struct hlist_node node_entry;
263 struct binder_proc *proc;
264 struct binder_node *node;
268 struct binder_ref_death *death;
271 struct binder_buffer {
272 struct list_head entry; /* free and allocated entries by address */
273 struct rb_node rb_node; /* free entry by size or allocated entry */
276 unsigned allow_user_free:1;
277 unsigned async_transaction:1;
278 unsigned debug_id:29;
280 struct binder_transaction *transaction;
282 struct binder_node *target_node;
288 enum binder_deferred_state {
289 BINDER_DEFERRED_PUT_FILES = 0x01,
290 BINDER_DEFERRED_FLUSH = 0x02,
291 BINDER_DEFERRED_RELEASE = 0x04,
295 struct hlist_node proc_node;
296 struct rb_root threads;
297 struct rb_root nodes;
298 struct rb_root refs_by_desc;
299 struct rb_root refs_by_node;
301 struct vm_area_struct *vma;
302 struct mm_struct *vma_vm_mm;
303 struct task_struct *tsk;
304 struct files_struct *files;
305 struct hlist_node deferred_work_node;
308 ptrdiff_t user_buffer_offset;
310 struct list_head buffers;
311 struct rb_root free_buffers;
312 struct rb_root allocated_buffers;
313 size_t free_async_space;
317 uint32_t buffer_free;
318 struct list_head todo;
319 wait_queue_head_t wait;
320 struct binder_stats stats;
321 struct list_head delivered_death;
323 int requested_threads;
324 int requested_threads_started;
326 long default_priority;
327 struct dentry *debugfs_entry;
331 BINDER_LOOPER_STATE_REGISTERED = 0x01,
332 BINDER_LOOPER_STATE_ENTERED = 0x02,
333 BINDER_LOOPER_STATE_EXITED = 0x04,
334 BINDER_LOOPER_STATE_INVALID = 0x08,
335 BINDER_LOOPER_STATE_WAITING = 0x10,
336 BINDER_LOOPER_STATE_NEED_RETURN = 0x20
339 struct binder_thread {
340 struct binder_proc *proc;
341 struct rb_node rb_node;
344 struct binder_transaction *transaction_stack;
345 struct list_head todo;
346 uint32_t return_error; /* Write failed, return error code in read buf */
347 uint32_t return_error2; /* Write failed, return error code in read */
348 /* buffer. Used when sending a reply to a dead process that */
349 /* we are also waiting on */
350 wait_queue_head_t wait;
351 struct binder_stats stats;
354 struct binder_transaction {
356 struct binder_work work;
357 struct binder_thread *from;
358 struct binder_transaction *from_parent;
359 struct binder_proc *to_proc;
360 struct binder_thread *to_thread;
361 struct binder_transaction *to_parent;
362 unsigned need_reply:1;
363 /* unsigned is_dead:1; */ /* not used at the moment */
365 struct binder_buffer *buffer;
374 binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
376 static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
378 struct files_struct *files = proc->files;
379 unsigned long rlim_cur;
385 if (!lock_task_sighand(proc->tsk, &irqs))
388 rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE);
389 unlock_task_sighand(proc->tsk, &irqs);
391 return __alloc_fd(files, 0, rlim_cur, flags);
395 * copied from fd_install
397 static void task_fd_install(
398 struct binder_proc *proc, unsigned int fd, struct file *file)
401 __fd_install(proc->files, fd, file);
405 * copied from sys_close
407 static long task_close_fd(struct binder_proc *proc, unsigned int fd)
411 if (proc->files == NULL)
414 retval = __close_fd(proc->files, fd);
415 /* can't restart close syscall because file table entry was cleared */
416 if (unlikely(retval == -ERESTARTSYS ||
417 retval == -ERESTARTNOINTR ||
418 retval == -ERESTARTNOHAND ||
419 retval == -ERESTART_RESTARTBLOCK))
425 static inline void binder_lock(const char *tag)
427 trace_binder_lock(tag);
428 mutex_lock(&binder_main_lock);
429 trace_binder_locked(tag);
432 static inline void binder_unlock(const char *tag)
434 trace_binder_unlock(tag);
435 mutex_unlock(&binder_main_lock);
438 static void binder_set_nice(long nice)
442 if (can_nice(current, nice)) {
443 set_user_nice(current, nice);
446 min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur);
447 binder_debug(BINDER_DEBUG_PRIORITY_CAP,
448 "%d: nice value %ld not allowed use %ld instead\n",
449 current->pid, nice, min_nice);
450 set_user_nice(current, min_nice);
451 if (min_nice <= MAX_NICE)
453 binder_user_error("%d RLIMIT_NICE not set\n", current->pid);
456 static size_t binder_buffer_size(struct binder_proc *proc,
457 struct binder_buffer *buffer)
459 if (list_is_last(&buffer->entry, &proc->buffers))
460 return proc->buffer + proc->buffer_size - (void *)buffer->data;
461 return (size_t)list_entry(buffer->entry.next,
462 struct binder_buffer, entry) - (size_t)buffer->data;
465 static void binder_insert_free_buffer(struct binder_proc *proc,
466 struct binder_buffer *new_buffer)
468 struct rb_node **p = &proc->free_buffers.rb_node;
469 struct rb_node *parent = NULL;
470 struct binder_buffer *buffer;
472 size_t new_buffer_size;
474 BUG_ON(!new_buffer->free);
476 new_buffer_size = binder_buffer_size(proc, new_buffer);
478 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
479 "%d: add free buffer, size %zd, at %p\n",
480 proc->pid, new_buffer_size, new_buffer);
484 buffer = rb_entry(parent, struct binder_buffer, rb_node);
485 BUG_ON(!buffer->free);
487 buffer_size = binder_buffer_size(proc, buffer);
489 if (new_buffer_size < buffer_size)
490 p = &parent->rb_left;
492 p = &parent->rb_right;
494 rb_link_node(&new_buffer->rb_node, parent, p);
495 rb_insert_color(&new_buffer->rb_node, &proc->free_buffers);
498 static void binder_insert_allocated_buffer(struct binder_proc *proc,
499 struct binder_buffer *new_buffer)
501 struct rb_node **p = &proc->allocated_buffers.rb_node;
502 struct rb_node *parent = NULL;
503 struct binder_buffer *buffer;
505 BUG_ON(new_buffer->free);
509 buffer = rb_entry(parent, struct binder_buffer, rb_node);
510 BUG_ON(buffer->free);
512 if (new_buffer < buffer)
513 p = &parent->rb_left;
514 else if (new_buffer > buffer)
515 p = &parent->rb_right;
519 rb_link_node(&new_buffer->rb_node, parent, p);
520 rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers);
523 static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc,
526 struct rb_node *n = proc->allocated_buffers.rb_node;
527 struct binder_buffer *buffer;
528 struct binder_buffer *kern_ptr;
530 kern_ptr = (struct binder_buffer *)(user_ptr - proc->user_buffer_offset
531 - offsetof(struct binder_buffer, data));
534 buffer = rb_entry(n, struct binder_buffer, rb_node);
535 BUG_ON(buffer->free);
537 if (kern_ptr < buffer)
539 else if (kern_ptr > buffer)
547 static int binder_update_page_range(struct binder_proc *proc, int allocate,
548 void *start, void *end,
549 struct vm_area_struct *vma)
552 unsigned long user_page_addr;
553 struct vm_struct tmp_area;
555 struct mm_struct *mm;
557 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
558 "%d: %s pages %p-%p\n", proc->pid,
559 allocate ? "allocate" : "free", start, end);
564 trace_binder_update_page_range(proc, allocate, start, end);
569 mm = get_task_mm(proc->tsk);
572 down_write(&mm->mmap_sem);
574 if (vma && mm != proc->vma_vm_mm) {
575 pr_err("%d: vma mm and task mm mismatch\n",
585 pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n",
590 for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
593 page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
596 *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
598 pr_err("%d: binder_alloc_buf failed for page at %p\n",
599 proc->pid, page_addr);
600 goto err_alloc_page_failed;
602 tmp_area.addr = page_addr;
603 tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */;
604 ret = map_vm_area(&tmp_area, PAGE_KERNEL, page);
606 pr_err("%d: binder_alloc_buf failed to map page at %p in kernel\n",
607 proc->pid, page_addr);
608 goto err_map_kernel_failed;
611 (uintptr_t)page_addr + proc->user_buffer_offset;
612 ret = vm_insert_page(vma, user_page_addr, page[0]);
614 pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
615 proc->pid, user_page_addr);
616 goto err_vm_insert_page_failed;
618 /* vm_insert_page does not seem to increment the refcount */
621 up_write(&mm->mmap_sem);
627 for (page_addr = end - PAGE_SIZE; page_addr >= start;
628 page_addr -= PAGE_SIZE) {
629 page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
631 zap_page_range(vma, (uintptr_t)page_addr +
632 proc->user_buffer_offset, PAGE_SIZE, NULL);
633 err_vm_insert_page_failed:
634 unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
635 err_map_kernel_failed:
638 err_alloc_page_failed:
643 up_write(&mm->mmap_sem);
649 static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
651 size_t offsets_size, int is_async)
653 struct rb_node *n = proc->free_buffers.rb_node;
654 struct binder_buffer *buffer;
656 struct rb_node *best_fit = NULL;
661 if (proc->vma == NULL) {
662 pr_err("%d: binder_alloc_buf, no vma\n",
667 size = ALIGN(data_size, sizeof(void *)) +
668 ALIGN(offsets_size, sizeof(void *));
670 if (size < data_size || size < offsets_size) {
671 binder_user_error("%d: got transaction with invalid size %zd-%zd\n",
672 proc->pid, data_size, offsets_size);
677 proc->free_async_space < size + sizeof(struct binder_buffer)) {
678 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
679 "%d: binder_alloc_buf size %zd failed, no async space left\n",
685 buffer = rb_entry(n, struct binder_buffer, rb_node);
686 BUG_ON(!buffer->free);
687 buffer_size = binder_buffer_size(proc, buffer);
689 if (size < buffer_size) {
692 } else if (size > buffer_size)
699 if (best_fit == NULL) {
700 pr_err("%d: binder_alloc_buf size %zd failed, no address space\n",
705 buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
706 buffer_size = binder_buffer_size(proc, buffer);
709 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
710 "%d: binder_alloc_buf size %zd got buffer %p size %zd\n",
711 proc->pid, size, buffer, buffer_size);
714 (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK);
716 if (size + sizeof(struct binder_buffer) + 4 >= buffer_size)
717 buffer_size = size; /* no room for other buffers */
719 buffer_size = size + sizeof(struct binder_buffer);
722 (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size);
723 if (end_page_addr > has_page_addr)
724 end_page_addr = has_page_addr;
725 if (binder_update_page_range(proc, 1,
726 (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL))
729 rb_erase(best_fit, &proc->free_buffers);
731 binder_insert_allocated_buffer(proc, buffer);
732 if (buffer_size != size) {
733 struct binder_buffer *new_buffer = (void *)buffer->data + size;
735 list_add(&new_buffer->entry, &buffer->entry);
736 new_buffer->free = 1;
737 binder_insert_free_buffer(proc, new_buffer);
739 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
740 "%d: binder_alloc_buf size %zd got %p\n",
741 proc->pid, size, buffer);
742 buffer->data_size = data_size;
743 buffer->offsets_size = offsets_size;
744 buffer->async_transaction = is_async;
746 proc->free_async_space -= size + sizeof(struct binder_buffer);
747 binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
748 "%d: binder_alloc_buf size %zd async free %zd\n",
749 proc->pid, size, proc->free_async_space);
755 static void *buffer_start_page(struct binder_buffer *buffer)
757 return (void *)((uintptr_t)buffer & PAGE_MASK);
760 static void *buffer_end_page(struct binder_buffer *buffer)
762 return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK);
765 static void binder_delete_free_buffer(struct binder_proc *proc,
766 struct binder_buffer *buffer)
768 struct binder_buffer *prev, *next = NULL;
769 int free_page_end = 1;
770 int free_page_start = 1;
772 BUG_ON(proc->buffers.next == &buffer->entry);
773 prev = list_entry(buffer->entry.prev, struct binder_buffer, entry);
775 if (buffer_end_page(prev) == buffer_start_page(buffer)) {
777 if (buffer_end_page(prev) == buffer_end_page(buffer))
779 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
780 "%d: merge free, buffer %p share page with %p\n",
781 proc->pid, buffer, prev);
784 if (!list_is_last(&buffer->entry, &proc->buffers)) {
785 next = list_entry(buffer->entry.next,
786 struct binder_buffer, entry);
787 if (buffer_start_page(next) == buffer_end_page(buffer)) {
789 if (buffer_start_page(next) ==
790 buffer_start_page(buffer))
792 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
793 "%d: merge free, buffer %p share page with %p\n",
794 proc->pid, buffer, prev);
797 list_del(&buffer->entry);
798 if (free_page_start || free_page_end) {
799 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
800 "%d: merge free, buffer %p do not share page%s%s with %p or %p\n",
801 proc->pid, buffer, free_page_start ? "" : " end",
802 free_page_end ? "" : " start", prev, next);
803 binder_update_page_range(proc, 0, free_page_start ?
804 buffer_start_page(buffer) : buffer_end_page(buffer),
805 (free_page_end ? buffer_end_page(buffer) :
806 buffer_start_page(buffer)) + PAGE_SIZE, NULL);
810 static void binder_free_buf(struct binder_proc *proc,
811 struct binder_buffer *buffer)
813 size_t size, buffer_size;
815 buffer_size = binder_buffer_size(proc, buffer);
817 size = ALIGN(buffer->data_size, sizeof(void *)) +
818 ALIGN(buffer->offsets_size, sizeof(void *));
820 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
821 "%d: binder_free_buf %p size %zd buffer_size %zd\n",
822 proc->pid, buffer, size, buffer_size);
824 BUG_ON(buffer->free);
825 BUG_ON(size > buffer_size);
826 BUG_ON(buffer->transaction != NULL);
827 BUG_ON((void *)buffer < proc->buffer);
828 BUG_ON((void *)buffer > proc->buffer + proc->buffer_size);
830 if (buffer->async_transaction) {
831 proc->free_async_space += size + sizeof(struct binder_buffer);
833 binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
834 "%d: binder_free_buf size %zd async free %zd\n",
835 proc->pid, size, proc->free_async_space);
838 binder_update_page_range(proc, 0,
839 (void *)PAGE_ALIGN((uintptr_t)buffer->data),
840 (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK),
842 rb_erase(&buffer->rb_node, &proc->allocated_buffers);
844 if (!list_is_last(&buffer->entry, &proc->buffers)) {
845 struct binder_buffer *next = list_entry(buffer->entry.next,
846 struct binder_buffer, entry);
849 rb_erase(&next->rb_node, &proc->free_buffers);
850 binder_delete_free_buffer(proc, next);
853 if (proc->buffers.next != &buffer->entry) {
854 struct binder_buffer *prev = list_entry(buffer->entry.prev,
855 struct binder_buffer, entry);
858 binder_delete_free_buffer(proc, buffer);
859 rb_erase(&prev->rb_node, &proc->free_buffers);
863 binder_insert_free_buffer(proc, buffer);
866 static struct binder_node *binder_get_node(struct binder_proc *proc,
867 binder_uintptr_t ptr)
869 struct rb_node *n = proc->nodes.rb_node;
870 struct binder_node *node;
873 node = rb_entry(n, struct binder_node, rb_node);
877 else if (ptr > node->ptr)
885 static struct binder_node *binder_new_node(struct binder_proc *proc,
886 binder_uintptr_t ptr,
887 binder_uintptr_t cookie)
889 struct rb_node **p = &proc->nodes.rb_node;
890 struct rb_node *parent = NULL;
891 struct binder_node *node;
895 node = rb_entry(parent, struct binder_node, rb_node);
899 else if (ptr > node->ptr)
905 node = kzalloc(sizeof(*node), GFP_KERNEL);
908 binder_stats_created(BINDER_STAT_NODE);
909 rb_link_node(&node->rb_node, parent, p);
910 rb_insert_color(&node->rb_node, &proc->nodes);
911 node->debug_id = ++binder_last_id;
914 node->cookie = cookie;
915 node->work.type = BINDER_WORK_NODE;
916 INIT_LIST_HEAD(&node->work.entry);
917 INIT_LIST_HEAD(&node->async_todo);
918 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
919 "%d:%d node %d u%016llx c%016llx created\n",
920 proc->pid, current->pid, node->debug_id,
921 (u64)node->ptr, (u64)node->cookie);
925 static int binder_inc_node(struct binder_node *node, int strong, int internal,
926 struct list_head *target_list)
930 if (target_list == NULL &&
931 node->internal_strong_refs == 0 &&
932 !(node == binder_context_mgr_node &&
933 node->has_strong_ref)) {
934 pr_err("invalid inc strong node for %d\n",
938 node->internal_strong_refs++;
940 node->local_strong_refs++;
941 if (!node->has_strong_ref && target_list) {
942 list_del_init(&node->work.entry);
943 list_add_tail(&node->work.entry, target_list);
947 node->local_weak_refs++;
948 if (!node->has_weak_ref && list_empty(&node->work.entry)) {
949 if (target_list == NULL) {
950 pr_err("invalid inc weak node for %d\n",
954 list_add_tail(&node->work.entry, target_list);
960 static int binder_dec_node(struct binder_node *node, int strong, int internal)
964 node->internal_strong_refs--;
966 node->local_strong_refs--;
967 if (node->local_strong_refs || node->internal_strong_refs)
971 node->local_weak_refs--;
972 if (node->local_weak_refs || !hlist_empty(&node->refs))
975 if (node->proc && (node->has_strong_ref || node->has_weak_ref)) {
976 if (list_empty(&node->work.entry)) {
977 list_add_tail(&node->work.entry, &node->proc->todo);
978 wake_up_interruptible(&node->proc->wait);
981 if (hlist_empty(&node->refs) && !node->local_strong_refs &&
982 !node->local_weak_refs) {
983 list_del_init(&node->work.entry);
985 rb_erase(&node->rb_node, &node->proc->nodes);
986 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
987 "refless node %d deleted\n",
990 hlist_del(&node->dead_node);
991 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
992 "dead node %d deleted\n",
996 binder_stats_deleted(BINDER_STAT_NODE);
1004 static struct binder_ref *binder_get_ref(struct binder_proc *proc,
1007 struct rb_node *n = proc->refs_by_desc.rb_node;
1008 struct binder_ref *ref;
1011 ref = rb_entry(n, struct binder_ref, rb_node_desc);
1013 if (desc < ref->desc)
1015 else if (desc > ref->desc)
1023 static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc,
1024 struct binder_node *node)
1027 struct rb_node **p = &proc->refs_by_node.rb_node;
1028 struct rb_node *parent = NULL;
1029 struct binder_ref *ref, *new_ref;
1033 ref = rb_entry(parent, struct binder_ref, rb_node_node);
1035 if (node < ref->node)
1037 else if (node > ref->node)
1038 p = &(*p)->rb_right;
1042 new_ref = kzalloc(sizeof(*ref), GFP_KERNEL);
1043 if (new_ref == NULL)
1045 binder_stats_created(BINDER_STAT_REF);
1046 new_ref->debug_id = ++binder_last_id;
1047 new_ref->proc = proc;
1048 new_ref->node = node;
1049 rb_link_node(&new_ref->rb_node_node, parent, p);
1050 rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
1052 new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1;
1053 for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
1054 ref = rb_entry(n, struct binder_ref, rb_node_desc);
1055 if (ref->desc > new_ref->desc)
1057 new_ref->desc = ref->desc + 1;
1060 p = &proc->refs_by_desc.rb_node;
1063 ref = rb_entry(parent, struct binder_ref, rb_node_desc);
1065 if (new_ref->desc < ref->desc)
1067 else if (new_ref->desc > ref->desc)
1068 p = &(*p)->rb_right;
1072 rb_link_node(&new_ref->rb_node_desc, parent, p);
1073 rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc);
1075 hlist_add_head(&new_ref->node_entry, &node->refs);
1077 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
1078 "%d new ref %d desc %d for node %d\n",
1079 proc->pid, new_ref->debug_id, new_ref->desc,
1082 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
1083 "%d new ref %d desc %d for dead node\n",
1084 proc->pid, new_ref->debug_id, new_ref->desc);
1089 static void binder_delete_ref(struct binder_ref *ref)
1091 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
1092 "%d delete ref %d desc %d for node %d\n",
1093 ref->proc->pid, ref->debug_id, ref->desc,
1094 ref->node->debug_id);
1096 rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc);
1097 rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node);
1099 binder_dec_node(ref->node, 1, 1);
1100 hlist_del(&ref->node_entry);
1101 binder_dec_node(ref->node, 0, 1);
1103 binder_debug(BINDER_DEBUG_DEAD_BINDER,
1104 "%d delete ref %d desc %d has death notification\n",
1105 ref->proc->pid, ref->debug_id, ref->desc);
1106 list_del(&ref->death->work.entry);
1108 binder_stats_deleted(BINDER_STAT_DEATH);
1111 binder_stats_deleted(BINDER_STAT_REF);
1114 static int binder_inc_ref(struct binder_ref *ref, int strong,
1115 struct list_head *target_list)
1120 if (ref->strong == 0) {
1121 ret = binder_inc_node(ref->node, 1, 1, target_list);
1127 if (ref->weak == 0) {
1128 ret = binder_inc_node(ref->node, 0, 1, target_list);
1138 static int binder_dec_ref(struct binder_ref *ref, int strong)
1141 if (ref->strong == 0) {
1142 binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n",
1143 ref->proc->pid, ref->debug_id,
1144 ref->desc, ref->strong, ref->weak);
1148 if (ref->strong == 0) {
1151 ret = binder_dec_node(ref->node, strong, 1);
1156 if (ref->weak == 0) {
1157 binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n",
1158 ref->proc->pid, ref->debug_id,
1159 ref->desc, ref->strong, ref->weak);
1164 if (ref->strong == 0 && ref->weak == 0)
1165 binder_delete_ref(ref);
1169 static void binder_pop_transaction(struct binder_thread *target_thread,
1170 struct binder_transaction *t)
1172 if (target_thread) {
1173 BUG_ON(target_thread->transaction_stack != t);
1174 BUG_ON(target_thread->transaction_stack->from != target_thread);
1175 target_thread->transaction_stack =
1176 target_thread->transaction_stack->from_parent;
1181 t->buffer->transaction = NULL;
1183 binder_stats_deleted(BINDER_STAT_TRANSACTION);
1186 static void binder_send_failed_reply(struct binder_transaction *t,
1187 uint32_t error_code)
1189 struct binder_thread *target_thread;
1190 struct binder_transaction *next;
1192 BUG_ON(t->flags & TF_ONE_WAY);
1194 target_thread = t->from;
1195 if (target_thread) {
1196 if (target_thread->return_error != BR_OK &&
1197 target_thread->return_error2 == BR_OK) {
1198 target_thread->return_error2 =
1199 target_thread->return_error;
1200 target_thread->return_error = BR_OK;
1202 if (target_thread->return_error == BR_OK) {
1203 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
1204 "send failed reply for transaction %d to %d:%d\n",
1206 target_thread->proc->pid,
1207 target_thread->pid);
1209 binder_pop_transaction(target_thread, t);
1210 target_thread->return_error = error_code;
1211 wake_up_interruptible(&target_thread->wait);
1213 pr_err("reply failed, target thread, %d:%d, has error code %d already\n",
1214 target_thread->proc->pid,
1216 target_thread->return_error);
1220 next = t->from_parent;
1222 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
1223 "send failed reply for transaction %d, target dead\n",
1226 binder_pop_transaction(target_thread, t);
1228 binder_debug(BINDER_DEBUG_DEAD_BINDER,
1229 "reply failed, no target thread at root\n");
1233 binder_debug(BINDER_DEBUG_DEAD_BINDER,
1234 "reply failed, no target thread -- retry %d\n",
1239 static void binder_transaction_buffer_release(struct binder_proc *proc,
1240 struct binder_buffer *buffer,
1241 binder_size_t *failed_at)
1243 binder_size_t *offp, *off_end;
1244 int debug_id = buffer->debug_id;
1246 binder_debug(BINDER_DEBUG_TRANSACTION,
1247 "%d buffer release %d, size %zd-%zd, failed at %p\n",
1248 proc->pid, buffer->debug_id,
1249 buffer->data_size, buffer->offsets_size, failed_at);
1251 if (buffer->target_node)
1252 binder_dec_node(buffer->target_node, 1, 0);
1254 offp = (binder_size_t *)(buffer->data +
1255 ALIGN(buffer->data_size, sizeof(void *)));
1257 off_end = failed_at;
1259 off_end = (void *)offp + buffer->offsets_size;
1260 for (; offp < off_end; offp++) {
1261 struct flat_binder_object *fp;
1263 if (*offp > buffer->data_size - sizeof(*fp) ||
1264 buffer->data_size < sizeof(*fp) ||
1265 !IS_ALIGNED(*offp, sizeof(u32))) {
1266 pr_err("transaction release %d bad offset %lld, size %zd\n",
1267 debug_id, (u64)*offp, buffer->data_size);
1270 fp = (struct flat_binder_object *)(buffer->data + *offp);
1272 case BINDER_TYPE_BINDER:
1273 case BINDER_TYPE_WEAK_BINDER: {
1274 struct binder_node *node = binder_get_node(proc, fp->binder);
1277 pr_err("transaction release %d bad node %016llx\n",
1278 debug_id, (u64)fp->binder);
1281 binder_debug(BINDER_DEBUG_TRANSACTION,
1282 " node %d u%016llx\n",
1283 node->debug_id, (u64)node->ptr);
1284 binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
1286 case BINDER_TYPE_HANDLE:
1287 case BINDER_TYPE_WEAK_HANDLE: {
1288 struct binder_ref *ref = binder_get_ref(proc, fp->handle);
1291 pr_err("transaction release %d bad handle %d\n",
1292 debug_id, fp->handle);
1295 binder_debug(BINDER_DEBUG_TRANSACTION,
1296 " ref %d desc %d (node %d)\n",
1297 ref->debug_id, ref->desc, ref->node->debug_id);
1298 binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE);
1301 case BINDER_TYPE_FD:
1302 binder_debug(BINDER_DEBUG_TRANSACTION,
1303 " fd %d\n", fp->handle);
1305 task_close_fd(proc, fp->handle);
1309 pr_err("transaction release %d bad object type %x\n",
1310 debug_id, fp->type);
1316 static void binder_transaction(struct binder_proc *proc,
1317 struct binder_thread *thread,
1318 struct binder_transaction_data *tr, int reply)
1320 struct binder_transaction *t;
1321 struct binder_work *tcomplete;
1322 binder_size_t *offp, *off_end;
1323 struct binder_proc *target_proc;
1324 struct binder_thread *target_thread = NULL;
1325 struct binder_node *target_node = NULL;
1326 struct list_head *target_list;
1327 wait_queue_head_t *target_wait;
1328 struct binder_transaction *in_reply_to = NULL;
1329 struct binder_transaction_log_entry *e;
1330 uint32_t return_error;
1332 e = binder_transaction_log_add(&binder_transaction_log);
1333 e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
1334 e->from_proc = proc->pid;
1335 e->from_thread = thread->pid;
1336 e->target_handle = tr->target.handle;
1337 e->data_size = tr->data_size;
1338 e->offsets_size = tr->offsets_size;
1341 in_reply_to = thread->transaction_stack;
1342 if (in_reply_to == NULL) {
1343 binder_user_error("%d:%d got reply transaction with no transaction stack\n",
1344 proc->pid, thread->pid);
1345 return_error = BR_FAILED_REPLY;
1346 goto err_empty_call_stack;
1348 binder_set_nice(in_reply_to->saved_priority);
1349 if (in_reply_to->to_thread != thread) {
1350 binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n",
1351 proc->pid, thread->pid, in_reply_to->debug_id,
1352 in_reply_to->to_proc ?
1353 in_reply_to->to_proc->pid : 0,
1354 in_reply_to->to_thread ?
1355 in_reply_to->to_thread->pid : 0);
1356 return_error = BR_FAILED_REPLY;
1358 goto err_bad_call_stack;
1360 thread->transaction_stack = in_reply_to->to_parent;
1361 target_thread = in_reply_to->from;
1362 if (target_thread == NULL) {
1363 return_error = BR_DEAD_REPLY;
1364 goto err_dead_binder;
1366 if (target_thread->transaction_stack != in_reply_to) {
1367 binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n",
1368 proc->pid, thread->pid,
1369 target_thread->transaction_stack ?
1370 target_thread->transaction_stack->debug_id : 0,
1371 in_reply_to->debug_id);
1372 return_error = BR_FAILED_REPLY;
1374 target_thread = NULL;
1375 goto err_dead_binder;
1377 target_proc = target_thread->proc;
1379 if (tr->target.handle) {
1380 struct binder_ref *ref;
1382 ref = binder_get_ref(proc, tr->target.handle);
1384 binder_user_error("%d:%d got transaction to invalid handle\n",
1385 proc->pid, thread->pid);
1386 return_error = BR_FAILED_REPLY;
1387 goto err_invalid_target_handle;
1389 target_node = ref->node;
1391 target_node = binder_context_mgr_node;
1392 if (target_node == NULL) {
1393 return_error = BR_DEAD_REPLY;
1394 goto err_no_context_mgr_node;
1397 e->to_node = target_node->debug_id;
1398 target_proc = target_node->proc;
1399 if (target_proc == NULL) {
1400 return_error = BR_DEAD_REPLY;
1401 goto err_dead_binder;
1403 if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) {
1404 struct binder_transaction *tmp;
1406 tmp = thread->transaction_stack;
1407 if (tmp->to_thread != thread) {
1408 binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n",
1409 proc->pid, thread->pid, tmp->debug_id,
1410 tmp->to_proc ? tmp->to_proc->pid : 0,
1412 tmp->to_thread->pid : 0);
1413 return_error = BR_FAILED_REPLY;
1414 goto err_bad_call_stack;
1417 if (tmp->from && tmp->from->proc == target_proc)
1418 target_thread = tmp->from;
1419 tmp = tmp->from_parent;
1423 if (target_thread) {
1424 e->to_thread = target_thread->pid;
1425 target_list = &target_thread->todo;
1426 target_wait = &target_thread->wait;
1428 target_list = &target_proc->todo;
1429 target_wait = &target_proc->wait;
1431 e->to_proc = target_proc->pid;
1433 /* TODO: reuse incoming transaction for reply */
1434 t = kzalloc(sizeof(*t), GFP_KERNEL);
1436 return_error = BR_FAILED_REPLY;
1437 goto err_alloc_t_failed;
1439 binder_stats_created(BINDER_STAT_TRANSACTION);
1441 tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
1442 if (tcomplete == NULL) {
1443 return_error = BR_FAILED_REPLY;
1444 goto err_alloc_tcomplete_failed;
1446 binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE);
1448 t->debug_id = ++binder_last_id;
1449 e->debug_id = t->debug_id;
1452 binder_debug(BINDER_DEBUG_TRANSACTION,
1453 "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld\n",
1454 proc->pid, thread->pid, t->debug_id,
1455 target_proc->pid, target_thread->pid,
1456 (u64)tr->data.ptr.buffer,
1457 (u64)tr->data.ptr.offsets,
1458 (u64)tr->data_size, (u64)tr->offsets_size);
1460 binder_debug(BINDER_DEBUG_TRANSACTION,
1461 "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld\n",
1462 proc->pid, thread->pid, t->debug_id,
1463 target_proc->pid, target_node->debug_id,
1464 (u64)tr->data.ptr.buffer,
1465 (u64)tr->data.ptr.offsets,
1466 (u64)tr->data_size, (u64)tr->offsets_size);
1468 if (!reply && !(tr->flags & TF_ONE_WAY))
1472 t->sender_euid = task_euid(proc->tsk);
1473 t->to_proc = target_proc;
1474 t->to_thread = target_thread;
1476 t->flags = tr->flags;
1477 t->priority = task_nice(current);
1479 trace_binder_transaction(reply, t, target_node);
1481 t->buffer = binder_alloc_buf(target_proc, tr->data_size,
1482 tr->offsets_size, !reply && (t->flags & TF_ONE_WAY));
1483 if (t->buffer == NULL) {
1484 return_error = BR_FAILED_REPLY;
1485 goto err_binder_alloc_buf_failed;
1487 t->buffer->allow_user_free = 0;
1488 t->buffer->debug_id = t->debug_id;
1489 t->buffer->transaction = t;
1490 t->buffer->target_node = target_node;
1491 trace_binder_transaction_alloc_buf(t->buffer);
1493 binder_inc_node(target_node, 1, 0, NULL);
1495 offp = (binder_size_t *)(t->buffer->data +
1496 ALIGN(tr->data_size, sizeof(void *)));
1498 if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t)
1499 tr->data.ptr.buffer, tr->data_size)) {
1500 binder_user_error("%d:%d got transaction with invalid data ptr\n",
1501 proc->pid, thread->pid);
1502 return_error = BR_FAILED_REPLY;
1503 goto err_copy_data_failed;
1505 if (copy_from_user(offp, (const void __user *)(uintptr_t)
1506 tr->data.ptr.offsets, tr->offsets_size)) {
1507 binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
1508 proc->pid, thread->pid);
1509 return_error = BR_FAILED_REPLY;
1510 goto err_copy_data_failed;
1512 if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) {
1513 binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n",
1514 proc->pid, thread->pid, (u64)tr->offsets_size);
1515 return_error = BR_FAILED_REPLY;
1516 goto err_bad_offset;
1518 off_end = (void *)offp + tr->offsets_size;
1519 for (; offp < off_end; offp++) {
1520 struct flat_binder_object *fp;
1522 if (*offp > t->buffer->data_size - sizeof(*fp) ||
1523 t->buffer->data_size < sizeof(*fp) ||
1524 !IS_ALIGNED(*offp, sizeof(u32))) {
1525 binder_user_error("%d:%d got transaction with invalid offset, %lld\n",
1526 proc->pid, thread->pid, (u64)*offp);
1527 return_error = BR_FAILED_REPLY;
1528 goto err_bad_offset;
1530 fp = (struct flat_binder_object *)(t->buffer->data + *offp);
1532 case BINDER_TYPE_BINDER:
1533 case BINDER_TYPE_WEAK_BINDER: {
1534 struct binder_ref *ref;
1535 struct binder_node *node = binder_get_node(proc, fp->binder);
1538 node = binder_new_node(proc, fp->binder, fp->cookie);
1540 return_error = BR_FAILED_REPLY;
1541 goto err_binder_new_node_failed;
1543 node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
1544 node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
1546 if (fp->cookie != node->cookie) {
1547 binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
1548 proc->pid, thread->pid,
1549 (u64)fp->binder, node->debug_id,
1550 (u64)fp->cookie, (u64)node->cookie);
1551 return_error = BR_FAILED_REPLY;
1552 goto err_binder_get_ref_for_node_failed;
1554 ref = binder_get_ref_for_node(target_proc, node);
1556 return_error = BR_FAILED_REPLY;
1557 goto err_binder_get_ref_for_node_failed;
1559 if (fp->type == BINDER_TYPE_BINDER)
1560 fp->type = BINDER_TYPE_HANDLE;
1562 fp->type = BINDER_TYPE_WEAK_HANDLE;
1563 fp->handle = ref->desc;
1564 binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE,
1567 trace_binder_transaction_node_to_ref(t, node, ref);
1568 binder_debug(BINDER_DEBUG_TRANSACTION,
1569 " node %d u%016llx -> ref %d desc %d\n",
1570 node->debug_id, (u64)node->ptr,
1571 ref->debug_id, ref->desc);
1573 case BINDER_TYPE_HANDLE:
1574 case BINDER_TYPE_WEAK_HANDLE: {
1575 struct binder_ref *ref = binder_get_ref(proc, fp->handle);
1578 binder_user_error("%d:%d got transaction with invalid handle, %d\n",
1580 thread->pid, fp->handle);
1581 return_error = BR_FAILED_REPLY;
1582 goto err_binder_get_ref_failed;
1584 if (ref->node->proc == target_proc) {
1585 if (fp->type == BINDER_TYPE_HANDLE)
1586 fp->type = BINDER_TYPE_BINDER;
1588 fp->type = BINDER_TYPE_WEAK_BINDER;
1589 fp->binder = ref->node->ptr;
1590 fp->cookie = ref->node->cookie;
1591 binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL);
1592 trace_binder_transaction_ref_to_node(t, ref);
1593 binder_debug(BINDER_DEBUG_TRANSACTION,
1594 " ref %d desc %d -> node %d u%016llx\n",
1595 ref->debug_id, ref->desc, ref->node->debug_id,
1596 (u64)ref->node->ptr);
1598 struct binder_ref *new_ref;
1600 new_ref = binder_get_ref_for_node(target_proc, ref->node);
1601 if (new_ref == NULL) {
1602 return_error = BR_FAILED_REPLY;
1603 goto err_binder_get_ref_for_node_failed;
1605 fp->handle = new_ref->desc;
1606 binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
1607 trace_binder_transaction_ref_to_ref(t, ref,
1609 binder_debug(BINDER_DEBUG_TRANSACTION,
1610 " ref %d desc %d -> ref %d desc %d (node %d)\n",
1611 ref->debug_id, ref->desc, new_ref->debug_id,
1612 new_ref->desc, ref->node->debug_id);
1616 case BINDER_TYPE_FD: {
1621 if (!(in_reply_to->flags & TF_ACCEPT_FDS)) {
1622 binder_user_error("%d:%d got reply with fd, %d, but target does not allow fds\n",
1623 proc->pid, thread->pid, fp->handle);
1624 return_error = BR_FAILED_REPLY;
1625 goto err_fd_not_allowed;
1627 } else if (!target_node->accept_fds) {
1628 binder_user_error("%d:%d got transaction with fd, %d, but target does not allow fds\n",
1629 proc->pid, thread->pid, fp->handle);
1630 return_error = BR_FAILED_REPLY;
1631 goto err_fd_not_allowed;
1634 file = fget(fp->handle);
1636 binder_user_error("%d:%d got transaction with invalid fd, %d\n",
1637 proc->pid, thread->pid, fp->handle);
1638 return_error = BR_FAILED_REPLY;
1639 goto err_fget_failed;
1641 target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC);
1642 if (target_fd < 0) {
1644 return_error = BR_FAILED_REPLY;
1645 goto err_get_unused_fd_failed;
1647 task_fd_install(target_proc, target_fd, file);
1648 trace_binder_transaction_fd(t, fp->handle, target_fd);
1649 binder_debug(BINDER_DEBUG_TRANSACTION,
1650 " fd %d -> %d\n", fp->handle, target_fd);
1652 fp->handle = target_fd;
1656 binder_user_error("%d:%d got transaction with invalid object type, %x\n",
1657 proc->pid, thread->pid, fp->type);
1658 return_error = BR_FAILED_REPLY;
1659 goto err_bad_object_type;
1663 BUG_ON(t->buffer->async_transaction != 0);
1664 binder_pop_transaction(target_thread, in_reply_to);
1665 } else if (!(t->flags & TF_ONE_WAY)) {
1666 BUG_ON(t->buffer->async_transaction != 0);
1668 t->from_parent = thread->transaction_stack;
1669 thread->transaction_stack = t;
1671 BUG_ON(target_node == NULL);
1672 BUG_ON(t->buffer->async_transaction != 1);
1673 if (target_node->has_async_transaction) {
1674 target_list = &target_node->async_todo;
1677 target_node->has_async_transaction = 1;
1679 t->work.type = BINDER_WORK_TRANSACTION;
1680 list_add_tail(&t->work.entry, target_list);
1681 tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE;
1682 list_add_tail(&tcomplete->entry, &thread->todo);
1684 wake_up_interruptible(target_wait);
1687 err_get_unused_fd_failed:
1690 err_binder_get_ref_for_node_failed:
1691 err_binder_get_ref_failed:
1692 err_binder_new_node_failed:
1693 err_bad_object_type:
1695 err_copy_data_failed:
1696 trace_binder_transaction_failed_buffer_release(t->buffer);
1697 binder_transaction_buffer_release(target_proc, t->buffer, offp);
1698 t->buffer->transaction = NULL;
1699 binder_free_buf(target_proc, t->buffer);
1700 err_binder_alloc_buf_failed:
1702 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
1703 err_alloc_tcomplete_failed:
1705 binder_stats_deleted(BINDER_STAT_TRANSACTION);
1708 err_empty_call_stack:
1710 err_invalid_target_handle:
1711 err_no_context_mgr_node:
1712 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
1713 "%d:%d transaction failed %d, size %lld-%lld\n",
1714 proc->pid, thread->pid, return_error,
1715 (u64)tr->data_size, (u64)tr->offsets_size);
1718 struct binder_transaction_log_entry *fe;
1720 fe = binder_transaction_log_add(&binder_transaction_log_failed);
1724 BUG_ON(thread->return_error != BR_OK);
1726 thread->return_error = BR_TRANSACTION_COMPLETE;
1727 binder_send_failed_reply(in_reply_to, return_error);
1729 thread->return_error = return_error;
1732 static int binder_thread_write(struct binder_proc *proc,
1733 struct binder_thread *thread,
1734 binder_uintptr_t binder_buffer, size_t size,
1735 binder_size_t *consumed)
1738 void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
1739 void __user *ptr = buffer + *consumed;
1740 void __user *end = buffer + size;
1742 while (ptr < end && thread->return_error == BR_OK) {
1743 if (get_user(cmd, (uint32_t __user *)ptr))
1745 ptr += sizeof(uint32_t);
1746 trace_binder_command(cmd);
1747 if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) {
1748 binder_stats.bc[_IOC_NR(cmd)]++;
1749 proc->stats.bc[_IOC_NR(cmd)]++;
1750 thread->stats.bc[_IOC_NR(cmd)]++;
1758 struct binder_ref *ref;
1759 const char *debug_string;
1761 if (get_user(target, (uint32_t __user *)ptr))
1763 ptr += sizeof(uint32_t);
1764 if (target == 0 && binder_context_mgr_node &&
1765 (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) {
1766 ref = binder_get_ref_for_node(proc,
1767 binder_context_mgr_node);
1768 if (ref->desc != target) {
1769 binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n",
1770 proc->pid, thread->pid,
1774 ref = binder_get_ref(proc, target);
1776 binder_user_error("%d:%d refcount change on invalid ref %d\n",
1777 proc->pid, thread->pid, target);
1782 debug_string = "IncRefs";
1783 binder_inc_ref(ref, 0, NULL);
1786 debug_string = "Acquire";
1787 binder_inc_ref(ref, 1, NULL);
1790 debug_string = "Release";
1791 binder_dec_ref(ref, 1);
1795 debug_string = "DecRefs";
1796 binder_dec_ref(ref, 0);
1799 binder_debug(BINDER_DEBUG_USER_REFS,
1800 "%d:%d %s ref %d desc %d s %d w %d for node %d\n",
1801 proc->pid, thread->pid, debug_string, ref->debug_id,
1802 ref->desc, ref->strong, ref->weak, ref->node->debug_id);
1805 case BC_INCREFS_DONE:
1806 case BC_ACQUIRE_DONE: {
1807 binder_uintptr_t node_ptr;
1808 binder_uintptr_t cookie;
1809 struct binder_node *node;
1811 if (get_user(node_ptr, (binder_uintptr_t __user *)ptr))
1813 ptr += sizeof(binder_uintptr_t);
1814 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
1816 ptr += sizeof(binder_uintptr_t);
1817 node = binder_get_node(proc, node_ptr);
1819 binder_user_error("%d:%d %s u%016llx no match\n",
1820 proc->pid, thread->pid,
1821 cmd == BC_INCREFS_DONE ?
1827 if (cookie != node->cookie) {
1828 binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n",
1829 proc->pid, thread->pid,
1830 cmd == BC_INCREFS_DONE ?
1831 "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
1832 (u64)node_ptr, node->debug_id,
1833 (u64)cookie, (u64)node->cookie);
1836 if (cmd == BC_ACQUIRE_DONE) {
1837 if (node->pending_strong_ref == 0) {
1838 binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n",
1839 proc->pid, thread->pid,
1843 node->pending_strong_ref = 0;
1845 if (node->pending_weak_ref == 0) {
1846 binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n",
1847 proc->pid, thread->pid,
1851 node->pending_weak_ref = 0;
1853 binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0);
1854 binder_debug(BINDER_DEBUG_USER_REFS,
1855 "%d:%d %s node %d ls %d lw %d\n",
1856 proc->pid, thread->pid,
1857 cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
1858 node->debug_id, node->local_strong_refs, node->local_weak_refs);
1861 case BC_ATTEMPT_ACQUIRE:
1862 pr_err("BC_ATTEMPT_ACQUIRE not supported\n");
1864 case BC_ACQUIRE_RESULT:
1865 pr_err("BC_ACQUIRE_RESULT not supported\n");
1868 case BC_FREE_BUFFER: {
1869 binder_uintptr_t data_ptr;
1870 struct binder_buffer *buffer;
1872 if (get_user(data_ptr, (binder_uintptr_t __user *)ptr))
1874 ptr += sizeof(binder_uintptr_t);
1876 buffer = binder_buffer_lookup(proc, data_ptr);
1877 if (buffer == NULL) {
1878 binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n",
1879 proc->pid, thread->pid, (u64)data_ptr);
1882 if (!buffer->allow_user_free) {
1883 binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n",
1884 proc->pid, thread->pid, (u64)data_ptr);
1887 binder_debug(BINDER_DEBUG_FREE_BUFFER,
1888 "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n",
1889 proc->pid, thread->pid, (u64)data_ptr,
1891 buffer->transaction ? "active" : "finished");
1893 if (buffer->transaction) {
1894 buffer->transaction->buffer = NULL;
1895 buffer->transaction = NULL;
1897 if (buffer->async_transaction && buffer->target_node) {
1898 BUG_ON(!buffer->target_node->has_async_transaction);
1899 if (list_empty(&buffer->target_node->async_todo))
1900 buffer->target_node->has_async_transaction = 0;
1902 list_move_tail(buffer->target_node->async_todo.next, &thread->todo);
1904 trace_binder_transaction_buffer_release(buffer);
1905 binder_transaction_buffer_release(proc, buffer, NULL);
1906 binder_free_buf(proc, buffer);
1910 case BC_TRANSACTION:
1912 struct binder_transaction_data tr;
1914 if (copy_from_user(&tr, ptr, sizeof(tr)))
1917 binder_transaction(proc, thread, &tr, cmd == BC_REPLY);
1921 case BC_REGISTER_LOOPER:
1922 binder_debug(BINDER_DEBUG_THREADS,
1923 "%d:%d BC_REGISTER_LOOPER\n",
1924 proc->pid, thread->pid);
1925 if (thread->looper & BINDER_LOOPER_STATE_ENTERED) {
1926 thread->looper |= BINDER_LOOPER_STATE_INVALID;
1927 binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n",
1928 proc->pid, thread->pid);
1929 } else if (proc->requested_threads == 0) {
1930 thread->looper |= BINDER_LOOPER_STATE_INVALID;
1931 binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n",
1932 proc->pid, thread->pid);
1934 proc->requested_threads--;
1935 proc->requested_threads_started++;
1937 thread->looper |= BINDER_LOOPER_STATE_REGISTERED;
1939 case BC_ENTER_LOOPER:
1940 binder_debug(BINDER_DEBUG_THREADS,
1941 "%d:%d BC_ENTER_LOOPER\n",
1942 proc->pid, thread->pid);
1943 if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) {
1944 thread->looper |= BINDER_LOOPER_STATE_INVALID;
1945 binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n",
1946 proc->pid, thread->pid);
1948 thread->looper |= BINDER_LOOPER_STATE_ENTERED;
1950 case BC_EXIT_LOOPER:
1951 binder_debug(BINDER_DEBUG_THREADS,
1952 "%d:%d BC_EXIT_LOOPER\n",
1953 proc->pid, thread->pid);
1954 thread->looper |= BINDER_LOOPER_STATE_EXITED;
1957 case BC_REQUEST_DEATH_NOTIFICATION:
1958 case BC_CLEAR_DEATH_NOTIFICATION: {
1960 binder_uintptr_t cookie;
1961 struct binder_ref *ref;
1962 struct binder_ref_death *death;
1964 if (get_user(target, (uint32_t __user *)ptr))
1966 ptr += sizeof(uint32_t);
1967 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
1969 ptr += sizeof(binder_uintptr_t);
1970 ref = binder_get_ref(proc, target);
1972 binder_user_error("%d:%d %s invalid ref %d\n",
1973 proc->pid, thread->pid,
1974 cmd == BC_REQUEST_DEATH_NOTIFICATION ?
1975 "BC_REQUEST_DEATH_NOTIFICATION" :
1976 "BC_CLEAR_DEATH_NOTIFICATION",
1981 binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
1982 "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n",
1983 proc->pid, thread->pid,
1984 cmd == BC_REQUEST_DEATH_NOTIFICATION ?
1985 "BC_REQUEST_DEATH_NOTIFICATION" :
1986 "BC_CLEAR_DEATH_NOTIFICATION",
1987 (u64)cookie, ref->debug_id, ref->desc,
1988 ref->strong, ref->weak, ref->node->debug_id);
1990 if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
1992 binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n",
1993 proc->pid, thread->pid);
1996 death = kzalloc(sizeof(*death), GFP_KERNEL);
1997 if (death == NULL) {
1998 thread->return_error = BR_ERROR;
1999 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
2000 "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n",
2001 proc->pid, thread->pid);
2004 binder_stats_created(BINDER_STAT_DEATH);
2005 INIT_LIST_HEAD(&death->work.entry);
2006 death->cookie = cookie;
2008 if (ref->node->proc == NULL) {
2009 ref->death->work.type = BINDER_WORK_DEAD_BINDER;
2010 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2011 list_add_tail(&ref->death->work.entry, &thread->todo);
2013 list_add_tail(&ref->death->work.entry, &proc->todo);
2014 wake_up_interruptible(&proc->wait);
2018 if (ref->death == NULL) {
2019 binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n",
2020 proc->pid, thread->pid);
2024 if (death->cookie != cookie) {
2025 binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n",
2026 proc->pid, thread->pid,
2032 if (list_empty(&death->work.entry)) {
2033 death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
2034 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2035 list_add_tail(&death->work.entry, &thread->todo);
2037 list_add_tail(&death->work.entry, &proc->todo);
2038 wake_up_interruptible(&proc->wait);
2041 BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
2042 death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
2046 case BC_DEAD_BINDER_DONE: {
2047 struct binder_work *w;
2048 binder_uintptr_t cookie;
2049 struct binder_ref_death *death = NULL;
2051 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
2054 ptr += sizeof(void *);
2055 list_for_each_entry(w, &proc->delivered_death, entry) {
2056 struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);
2058 if (tmp_death->cookie == cookie) {
2063 binder_debug(BINDER_DEBUG_DEAD_BINDER,
2064 "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n",
2065 proc->pid, thread->pid, (u64)cookie,
2067 if (death == NULL) {
2068 binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n",
2069 proc->pid, thread->pid, (u64)cookie);
2073 list_del_init(&death->work.entry);
2074 if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
2075 death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
2076 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2077 list_add_tail(&death->work.entry, &thread->todo);
2079 list_add_tail(&death->work.entry, &proc->todo);
2080 wake_up_interruptible(&proc->wait);
2086 pr_err("%d:%d unknown command %d\n",
2087 proc->pid, thread->pid, cmd);
2090 *consumed = ptr - buffer;
2095 static void binder_stat_br(struct binder_proc *proc,
2096 struct binder_thread *thread, uint32_t cmd)
2098 trace_binder_return(cmd);
2099 if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) {
2100 binder_stats.br[_IOC_NR(cmd)]++;
2101 proc->stats.br[_IOC_NR(cmd)]++;
2102 thread->stats.br[_IOC_NR(cmd)]++;
2106 static int binder_has_proc_work(struct binder_proc *proc,
2107 struct binder_thread *thread)
2109 return !list_empty(&proc->todo) ||
2110 (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
2113 static int binder_has_thread_work(struct binder_thread *thread)
2115 return !list_empty(&thread->todo) || thread->return_error != BR_OK ||
2116 (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
2119 static int binder_thread_read(struct binder_proc *proc,
2120 struct binder_thread *thread,
2121 binder_uintptr_t binder_buffer, size_t size,
2122 binder_size_t *consumed, int non_block)
2124 void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
2125 void __user *ptr = buffer + *consumed;
2126 void __user *end = buffer + size;
2129 int wait_for_proc_work;
2131 if (*consumed == 0) {
2132 if (put_user(BR_NOOP, (uint32_t __user *)ptr))
2134 ptr += sizeof(uint32_t);
2138 wait_for_proc_work = thread->transaction_stack == NULL &&
2139 list_empty(&thread->todo);
2141 if (thread->return_error != BR_OK && ptr < end) {
2142 if (thread->return_error2 != BR_OK) {
2143 if (put_user(thread->return_error2, (uint32_t __user *)ptr))
2145 ptr += sizeof(uint32_t);
2146 binder_stat_br(proc, thread, thread->return_error2);
2149 thread->return_error2 = BR_OK;
2151 if (put_user(thread->return_error, (uint32_t __user *)ptr))
2153 ptr += sizeof(uint32_t);
2154 binder_stat_br(proc, thread, thread->return_error);
2155 thread->return_error = BR_OK;
2160 thread->looper |= BINDER_LOOPER_STATE_WAITING;
2161 if (wait_for_proc_work)
2162 proc->ready_threads++;
2164 binder_unlock(__func__);
2166 trace_binder_wait_for_work(wait_for_proc_work,
2167 !!thread->transaction_stack,
2168 !list_empty(&thread->todo));
2169 if (wait_for_proc_work) {
2170 if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
2171 BINDER_LOOPER_STATE_ENTERED))) {
2172 binder_user_error("%d:%d ERROR: Thread waiting for process work before calling BC_REGISTER_LOOPER or BC_ENTER_LOOPER (state %x)\n",
2173 proc->pid, thread->pid, thread->looper);
2174 wait_event_interruptible(binder_user_error_wait,
2175 binder_stop_on_user_error < 2);
2177 binder_set_nice(proc->default_priority);
2179 if (!binder_has_proc_work(proc, thread))
2182 ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread));
2185 if (!binder_has_thread_work(thread))
2188 ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread));
2191 binder_lock(__func__);
2193 if (wait_for_proc_work)
2194 proc->ready_threads--;
2195 thread->looper &= ~BINDER_LOOPER_STATE_WAITING;
2202 struct binder_transaction_data tr;
2203 struct binder_work *w;
2204 struct binder_transaction *t = NULL;
2206 if (!list_empty(&thread->todo)) {
2207 w = list_first_entry(&thread->todo, struct binder_work,
2209 } else if (!list_empty(&proc->todo) && wait_for_proc_work) {
2210 w = list_first_entry(&proc->todo, struct binder_work,
2214 if (ptr - buffer == 4 &&
2215 !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN))
2220 if (end - ptr < sizeof(tr) + 4)
2224 case BINDER_WORK_TRANSACTION: {
2225 t = container_of(w, struct binder_transaction, work);
2227 case BINDER_WORK_TRANSACTION_COMPLETE: {
2228 cmd = BR_TRANSACTION_COMPLETE;
2229 if (put_user(cmd, (uint32_t __user *)ptr))
2231 ptr += sizeof(uint32_t);
2233 binder_stat_br(proc, thread, cmd);
2234 binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE,
2235 "%d:%d BR_TRANSACTION_COMPLETE\n",
2236 proc->pid, thread->pid);
2238 list_del(&w->entry);
2240 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
2242 case BINDER_WORK_NODE: {
2243 struct binder_node *node = container_of(w, struct binder_node, work);
2244 uint32_t cmd = BR_NOOP;
2245 const char *cmd_name;
2246 int strong = node->internal_strong_refs || node->local_strong_refs;
2247 int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong;
2249 if (weak && !node->has_weak_ref) {
2251 cmd_name = "BR_INCREFS";
2252 node->has_weak_ref = 1;
2253 node->pending_weak_ref = 1;
2254 node->local_weak_refs++;
2255 } else if (strong && !node->has_strong_ref) {
2257 cmd_name = "BR_ACQUIRE";
2258 node->has_strong_ref = 1;
2259 node->pending_strong_ref = 1;
2260 node->local_strong_refs++;
2261 } else if (!strong && node->has_strong_ref) {
2263 cmd_name = "BR_RELEASE";
2264 node->has_strong_ref = 0;
2265 } else if (!weak && node->has_weak_ref) {
2267 cmd_name = "BR_DECREFS";
2268 node->has_weak_ref = 0;
2270 if (cmd != BR_NOOP) {
2271 if (put_user(cmd, (uint32_t __user *)ptr))
2273 ptr += sizeof(uint32_t);
2274 if (put_user(node->ptr,
2275 (binder_uintptr_t __user *)ptr))
2277 ptr += sizeof(binder_uintptr_t);
2278 if (put_user(node->cookie,
2279 (binder_uintptr_t __user *)ptr))
2281 ptr += sizeof(binder_uintptr_t);
2283 binder_stat_br(proc, thread, cmd);
2284 binder_debug(BINDER_DEBUG_USER_REFS,
2285 "%d:%d %s %d u%016llx c%016llx\n",
2286 proc->pid, thread->pid, cmd_name,
2288 (u64)node->ptr, (u64)node->cookie);
2290 list_del_init(&w->entry);
2291 if (!weak && !strong) {
2292 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
2293 "%d:%d node %d u%016llx c%016llx deleted\n",
2294 proc->pid, thread->pid,
2298 rb_erase(&node->rb_node, &proc->nodes);
2300 binder_stats_deleted(BINDER_STAT_NODE);
2302 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
2303 "%d:%d node %d u%016llx c%016llx state unchanged\n",
2304 proc->pid, thread->pid,
2311 case BINDER_WORK_DEAD_BINDER:
2312 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
2313 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
2314 struct binder_ref_death *death;
2317 death = container_of(w, struct binder_ref_death, work);
2318 if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
2319 cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
2321 cmd = BR_DEAD_BINDER;
2322 if (put_user(cmd, (uint32_t __user *)ptr))
2324 ptr += sizeof(uint32_t);
2325 if (put_user(death->cookie,
2326 (binder_uintptr_t __user *)ptr))
2328 ptr += sizeof(binder_uintptr_t);
2329 binder_stat_br(proc, thread, cmd);
2330 binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
2331 "%d:%d %s %016llx\n",
2332 proc->pid, thread->pid,
2333 cmd == BR_DEAD_BINDER ?
2335 "BR_CLEAR_DEATH_NOTIFICATION_DONE",
2336 (u64)death->cookie);
2338 if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
2339 list_del(&w->entry);
2341 binder_stats_deleted(BINDER_STAT_DEATH);
2343 list_move(&w->entry, &proc->delivered_death);
2344 if (cmd == BR_DEAD_BINDER)
2345 goto done; /* DEAD_BINDER notifications can cause transactions */
2352 BUG_ON(t->buffer == NULL);
2353 if (t->buffer->target_node) {
2354 struct binder_node *target_node = t->buffer->target_node;
2356 tr.target.ptr = target_node->ptr;
2357 tr.cookie = target_node->cookie;
2358 t->saved_priority = task_nice(current);
2359 if (t->priority < target_node->min_priority &&
2360 !(t->flags & TF_ONE_WAY))
2361 binder_set_nice(t->priority);
2362 else if (!(t->flags & TF_ONE_WAY) ||
2363 t->saved_priority > target_node->min_priority)
2364 binder_set_nice(target_node->min_priority);
2365 cmd = BR_TRANSACTION;
2372 tr.flags = t->flags;
2373 tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid);
2376 struct task_struct *sender = t->from->proc->tsk;
2378 tr.sender_pid = task_tgid_nr_ns(sender,
2379 task_active_pid_ns(current));
2384 tr.data_size = t->buffer->data_size;
2385 tr.offsets_size = t->buffer->offsets_size;
2386 tr.data.ptr.buffer = (binder_uintptr_t)(
2387 (uintptr_t)t->buffer->data +
2388 proc->user_buffer_offset);
2389 tr.data.ptr.offsets = tr.data.ptr.buffer +
2390 ALIGN(t->buffer->data_size,
2393 if (put_user(cmd, (uint32_t __user *)ptr))
2395 ptr += sizeof(uint32_t);
2396 if (copy_to_user(ptr, &tr, sizeof(tr)))
2400 trace_binder_transaction_received(t);
2401 binder_stat_br(proc, thread, cmd);
2402 binder_debug(BINDER_DEBUG_TRANSACTION,
2403 "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n",
2404 proc->pid, thread->pid,
2405 (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
2407 t->debug_id, t->from ? t->from->proc->pid : 0,
2408 t->from ? t->from->pid : 0, cmd,
2409 t->buffer->data_size, t->buffer->offsets_size,
2410 (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets);
2412 list_del(&t->work.entry);
2413 t->buffer->allow_user_free = 1;
2414 if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
2415 t->to_parent = thread->transaction_stack;
2416 t->to_thread = thread;
2417 thread->transaction_stack = t;
2419 t->buffer->transaction = NULL;
2421 binder_stats_deleted(BINDER_STAT_TRANSACTION);
2428 *consumed = ptr - buffer;
2429 if (proc->requested_threads + proc->ready_threads == 0 &&
2430 proc->requested_threads_started < proc->max_threads &&
2431 (thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
2432 BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
2433 /*spawn a new thread if we leave this out */) {
2434 proc->requested_threads++;
2435 binder_debug(BINDER_DEBUG_THREADS,
2436 "%d:%d BR_SPAWN_LOOPER\n",
2437 proc->pid, thread->pid);
2438 if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer))
2440 binder_stat_br(proc, thread, BR_SPAWN_LOOPER);
2445 static void binder_release_work(struct list_head *list)
2447 struct binder_work *w;
2449 while (!list_empty(list)) {
2450 w = list_first_entry(list, struct binder_work, entry);
2451 list_del_init(&w->entry);
2453 case BINDER_WORK_TRANSACTION: {
2454 struct binder_transaction *t;
2456 t = container_of(w, struct binder_transaction, work);
2457 if (t->buffer->target_node &&
2458 !(t->flags & TF_ONE_WAY)) {
2459 binder_send_failed_reply(t, BR_DEAD_REPLY);
2461 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
2462 "undelivered transaction %d\n",
2464 t->buffer->transaction = NULL;
2466 binder_stats_deleted(BINDER_STAT_TRANSACTION);
2469 case BINDER_WORK_TRANSACTION_COMPLETE: {
2470 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
2471 "undelivered TRANSACTION_COMPLETE\n");
2473 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
2475 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
2476 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
2477 struct binder_ref_death *death;
2479 death = container_of(w, struct binder_ref_death, work);
2480 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
2481 "undelivered death notification, %016llx\n",
2482 (u64)death->cookie);
2484 binder_stats_deleted(BINDER_STAT_DEATH);
2487 pr_err("unexpected work type, %d, not freed\n",
2495 static struct binder_thread *binder_get_thread(struct binder_proc *proc)
2497 struct binder_thread *thread = NULL;
2498 struct rb_node *parent = NULL;
2499 struct rb_node **p = &proc->threads.rb_node;
2503 thread = rb_entry(parent, struct binder_thread, rb_node);
2505 if (current->pid < thread->pid)
2507 else if (current->pid > thread->pid)
2508 p = &(*p)->rb_right;
2513 thread = kzalloc(sizeof(*thread), GFP_KERNEL);
2516 binder_stats_created(BINDER_STAT_THREAD);
2517 thread->proc = proc;
2518 thread->pid = current->pid;
2519 init_waitqueue_head(&thread->wait);
2520 INIT_LIST_HEAD(&thread->todo);
2521 rb_link_node(&thread->rb_node, parent, p);
2522 rb_insert_color(&thread->rb_node, &proc->threads);
2523 thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
2524 thread->return_error = BR_OK;
2525 thread->return_error2 = BR_OK;
2530 static int binder_free_thread(struct binder_proc *proc,
2531 struct binder_thread *thread)
2533 struct binder_transaction *t;
2534 struct binder_transaction *send_reply = NULL;
2535 int active_transactions = 0;
2537 rb_erase(&thread->rb_node, &proc->threads);
2538 t = thread->transaction_stack;
2539 if (t && t->to_thread == thread)
2542 active_transactions++;
2543 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
2544 "release %d:%d transaction %d %s, still active\n",
2545 proc->pid, thread->pid,
2547 (t->to_thread == thread) ? "in" : "out");
2549 if (t->to_thread == thread) {
2551 t->to_thread = NULL;
2553 t->buffer->transaction = NULL;
2557 } else if (t->from == thread) {
2564 binder_send_failed_reply(send_reply, BR_DEAD_REPLY);
2565 binder_release_work(&thread->todo);
2567 binder_stats_deleted(BINDER_STAT_THREAD);
2568 return active_transactions;
2571 static unsigned int binder_poll(struct file *filp,
2572 struct poll_table_struct *wait)
2574 struct binder_proc *proc = filp->private_data;
2575 struct binder_thread *thread = NULL;
2576 int wait_for_proc_work;
2578 binder_lock(__func__);
2580 thread = binder_get_thread(proc);
2582 wait_for_proc_work = thread->transaction_stack == NULL &&
2583 list_empty(&thread->todo) && thread->return_error == BR_OK;
2585 binder_unlock(__func__);
2587 if (wait_for_proc_work) {
2588 if (binder_has_proc_work(proc, thread))
2590 poll_wait(filp, &proc->wait, wait);
2591 if (binder_has_proc_work(proc, thread))
2594 if (binder_has_thread_work(thread))
2596 poll_wait(filp, &thread->wait, wait);
2597 if (binder_has_thread_work(thread))
2603 static int binder_ioctl_write_read(struct file *filp,
2604 unsigned int cmd, unsigned long arg,
2605 struct binder_thread *thread)
2608 struct binder_proc *proc = filp->private_data;
2609 unsigned int size = _IOC_SIZE(cmd);
2610 void __user *ubuf = (void __user *)arg;
2611 struct binder_write_read bwr;
2613 if (size != sizeof(struct binder_write_read)) {
2617 if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
2621 binder_debug(BINDER_DEBUG_READ_WRITE,
2622 "%d:%d write %lld at %016llx, read %lld at %016llx\n",
2623 proc->pid, thread->pid,
2624 (u64)bwr.write_size, (u64)bwr.write_buffer,
2625 (u64)bwr.read_size, (u64)bwr.read_buffer);
2627 if (bwr.write_size > 0) {
2628 ret = binder_thread_write(proc, thread,
2631 &bwr.write_consumed);
2632 trace_binder_write_done(ret);
2634 bwr.read_consumed = 0;
2635 if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
2640 if (bwr.read_size > 0) {
2641 ret = binder_thread_read(proc, thread, bwr.read_buffer,
2644 filp->f_flags & O_NONBLOCK);
2645 trace_binder_read_done(ret);
2646 if (!list_empty(&proc->todo))
2647 wake_up_interruptible(&proc->wait);
2649 if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
2654 binder_debug(BINDER_DEBUG_READ_WRITE,
2655 "%d:%d wrote %lld of %lld, read return %lld of %lld\n",
2656 proc->pid, thread->pid,
2657 (u64)bwr.write_consumed, (u64)bwr.write_size,
2658 (u64)bwr.read_consumed, (u64)bwr.read_size);
2659 if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
2667 static int binder_ioctl_set_ctx_mgr(struct file *filp)
2670 struct binder_proc *proc = filp->private_data;
2671 kuid_t curr_euid = current_euid();
2673 if (binder_context_mgr_node != NULL) {
2674 pr_err("BINDER_SET_CONTEXT_MGR already set\n");
2678 if (uid_valid(binder_context_mgr_uid)) {
2679 if (!uid_eq(binder_context_mgr_uid, curr_euid)) {
2680 pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
2681 from_kuid(&init_user_ns, curr_euid),
2682 from_kuid(&init_user_ns,
2683 binder_context_mgr_uid));
2688 binder_context_mgr_uid = curr_euid;
2690 binder_context_mgr_node = binder_new_node(proc, 0, 0);
2691 if (binder_context_mgr_node == NULL) {
2695 binder_context_mgr_node->local_weak_refs++;
2696 binder_context_mgr_node->local_strong_refs++;
2697 binder_context_mgr_node->has_strong_ref = 1;
2698 binder_context_mgr_node->has_weak_ref = 1;
2703 static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
2706 struct binder_proc *proc = filp->private_data;
2707 struct binder_thread *thread;
2708 unsigned int size = _IOC_SIZE(cmd);
2709 void __user *ubuf = (void __user *)arg;
2711 /*pr_info("binder_ioctl: %d:%d %x %lx\n",
2712 proc->pid, current->pid, cmd, arg);*/
2714 trace_binder_ioctl(cmd, arg);
2716 ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
2720 binder_lock(__func__);
2721 thread = binder_get_thread(proc);
2722 if (thread == NULL) {
2728 case BINDER_WRITE_READ:
2729 ret = binder_ioctl_write_read(filp, cmd, arg, thread);
2733 case BINDER_SET_MAX_THREADS:
2734 if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
2739 case BINDER_SET_CONTEXT_MGR:
2740 ret = binder_ioctl_set_ctx_mgr(filp);
2744 case BINDER_THREAD_EXIT:
2745 binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n",
2746 proc->pid, thread->pid);
2747 binder_free_thread(proc, thread);
2750 case BINDER_VERSION: {
2751 struct binder_version __user *ver = ubuf;
2753 if (size != sizeof(struct binder_version)) {
2757 if (put_user(BINDER_CURRENT_PROTOCOL_VERSION,
2758 &ver->protocol_version)) {
2771 thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN;
2772 binder_unlock(__func__);
2773 wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
2774 if (ret && ret != -ERESTARTSYS)
2775 pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret);
2777 trace_binder_ioctl_done(ret);
2781 static void binder_vma_open(struct vm_area_struct *vma)
2783 struct binder_proc *proc = vma->vm_private_data;
2785 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2786 "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
2787 proc->pid, vma->vm_start, vma->vm_end,
2788 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2789 (unsigned long)pgprot_val(vma->vm_page_prot));
2792 static void binder_vma_close(struct vm_area_struct *vma)
2794 struct binder_proc *proc = vma->vm_private_data;
2796 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2797 "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
2798 proc->pid, vma->vm_start, vma->vm_end,
2799 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2800 (unsigned long)pgprot_val(vma->vm_page_prot));
2802 proc->vma_vm_mm = NULL;
2803 binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES);
2806 static int binder_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
2808 return VM_FAULT_SIGBUS;
2811 static struct vm_operations_struct binder_vm_ops = {
2812 .open = binder_vma_open,
2813 .close = binder_vma_close,
2814 .fault = binder_vm_fault,
2817 static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
2820 struct vm_struct *area;
2821 struct binder_proc *proc = filp->private_data;
2822 const char *failure_string;
2823 struct binder_buffer *buffer;
2825 if (proc->tsk != current)
2828 if ((vma->vm_end - vma->vm_start) > SZ_4M)
2829 vma->vm_end = vma->vm_start + SZ_4M;
2831 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2832 "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n",
2833 proc->pid, vma->vm_start, vma->vm_end,
2834 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2835 (unsigned long)pgprot_val(vma->vm_page_prot));
2837 if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
2839 failure_string = "bad vm_flags";
2842 vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE;
2844 mutex_lock(&binder_mmap_lock);
2847 failure_string = "already mapped";
2848 goto err_already_mapped;
2851 area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP);
2854 failure_string = "get_vm_area";
2855 goto err_get_vm_area_failed;
2857 proc->buffer = area->addr;
2858 proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer;
2859 mutex_unlock(&binder_mmap_lock);
2861 #ifdef CONFIG_CPU_CACHE_VIPT
2862 if (cache_is_vipt_aliasing()) {
2863 while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) {
2864 pr_info("binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);
2865 vma->vm_start += PAGE_SIZE;
2869 proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL);
2870 if (proc->pages == NULL) {
2872 failure_string = "alloc page array";
2873 goto err_alloc_pages_failed;
2875 proc->buffer_size = vma->vm_end - vma->vm_start;
2877 vma->vm_ops = &binder_vm_ops;
2878 vma->vm_private_data = proc;
2880 if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) {
2882 failure_string = "alloc small buf";
2883 goto err_alloc_small_buf_failed;
2885 buffer = proc->buffer;
2886 INIT_LIST_HEAD(&proc->buffers);
2887 list_add(&buffer->entry, &proc->buffers);
2889 binder_insert_free_buffer(proc, buffer);
2890 proc->free_async_space = proc->buffer_size / 2;
2892 proc->files = get_files_struct(current);
2894 proc->vma_vm_mm = vma->vm_mm;
2896 /*pr_info("binder_mmap: %d %lx-%lx maps %p\n",
2897 proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/
2900 err_alloc_small_buf_failed:
2903 err_alloc_pages_failed:
2904 mutex_lock(&binder_mmap_lock);
2905 vfree(proc->buffer);
2906 proc->buffer = NULL;
2907 err_get_vm_area_failed:
2909 mutex_unlock(&binder_mmap_lock);
2911 pr_err("binder_mmap: %d %lx-%lx %s failed %d\n",
2912 proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
2916 static int binder_open(struct inode *nodp, struct file *filp)
2918 struct binder_proc *proc;
2920 binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n",
2921 current->group_leader->pid, current->pid);
2923 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
2926 get_task_struct(current);
2927 proc->tsk = current;
2928 INIT_LIST_HEAD(&proc->todo);
2929 init_waitqueue_head(&proc->wait);
2930 proc->default_priority = task_nice(current);
2932 binder_lock(__func__);
2934 binder_stats_created(BINDER_STAT_PROC);
2935 hlist_add_head(&proc->proc_node, &binder_procs);
2936 proc->pid = current->group_leader->pid;
2937 INIT_LIST_HEAD(&proc->delivered_death);
2938 filp->private_data = proc;
2940 binder_unlock(__func__);
2942 if (binder_debugfs_dir_entry_proc) {
2945 snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
2946 proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO,
2947 binder_debugfs_dir_entry_proc, proc, &binder_proc_fops);
2953 static int binder_flush(struct file *filp, fl_owner_t id)
2955 struct binder_proc *proc = filp->private_data;
2957 binder_defer_work(proc, BINDER_DEFERRED_FLUSH);
2962 static void binder_deferred_flush(struct binder_proc *proc)
2967 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
2968 struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
2970 thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
2971 if (thread->looper & BINDER_LOOPER_STATE_WAITING) {
2972 wake_up_interruptible(&thread->wait);
2976 wake_up_interruptible_all(&proc->wait);
2978 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2979 "binder_flush: %d woke %d threads\n", proc->pid,
2983 static int binder_release(struct inode *nodp, struct file *filp)
2985 struct binder_proc *proc = filp->private_data;
2987 debugfs_remove(proc->debugfs_entry);
2988 binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
2993 static int binder_node_release(struct binder_node *node, int refs)
2995 struct binder_ref *ref;
2998 list_del_init(&node->work.entry);
2999 binder_release_work(&node->async_todo);
3001 if (hlist_empty(&node->refs)) {
3003 binder_stats_deleted(BINDER_STAT_NODE);
3009 node->local_strong_refs = 0;
3010 node->local_weak_refs = 0;
3011 hlist_add_head(&node->dead_node, &binder_dead_nodes);
3013 hlist_for_each_entry(ref, &node->refs, node_entry) {
3021 if (list_empty(&ref->death->work.entry)) {
3022 ref->death->work.type = BINDER_WORK_DEAD_BINDER;
3023 list_add_tail(&ref->death->work.entry,
3025 wake_up_interruptible(&ref->proc->wait);
3030 binder_debug(BINDER_DEBUG_DEAD_BINDER,
3031 "node %d now dead, refs %d, death %d\n",
3032 node->debug_id, refs, death);
3037 static void binder_deferred_release(struct binder_proc *proc)
3039 struct binder_transaction *t;
3041 int threads, nodes, incoming_refs, outgoing_refs, buffers,
3042 active_transactions, page_count;
3045 BUG_ON(proc->files);
3047 hlist_del(&proc->proc_node);
3049 if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
3050 binder_debug(BINDER_DEBUG_DEAD_BINDER,
3051 "%s: %d context_mgr_node gone\n",
3052 __func__, proc->pid);
3053 binder_context_mgr_node = NULL;
3057 active_transactions = 0;
3058 while ((n = rb_first(&proc->threads))) {
3059 struct binder_thread *thread;
3061 thread = rb_entry(n, struct binder_thread, rb_node);
3063 active_transactions += binder_free_thread(proc, thread);
3068 while ((n = rb_first(&proc->nodes))) {
3069 struct binder_node *node;
3071 node = rb_entry(n, struct binder_node, rb_node);
3073 rb_erase(&node->rb_node, &proc->nodes);
3074 incoming_refs = binder_node_release(node, incoming_refs);
3078 while ((n = rb_first(&proc->refs_by_desc))) {
3079 struct binder_ref *ref;
3081 ref = rb_entry(n, struct binder_ref, rb_node_desc);
3083 binder_delete_ref(ref);
3086 binder_release_work(&proc->todo);
3087 binder_release_work(&proc->delivered_death);
3090 while ((n = rb_first(&proc->allocated_buffers))) {
3091 struct binder_buffer *buffer;
3093 buffer = rb_entry(n, struct binder_buffer, rb_node);
3095 t = buffer->transaction;
3098 buffer->transaction = NULL;
3099 pr_err("release proc %d, transaction %d, not freed\n",
3100 proc->pid, t->debug_id);
3104 binder_free_buf(proc, buffer);
3108 binder_stats_deleted(BINDER_STAT_PROC);
3114 for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) {
3117 if (!proc->pages[i])
3120 page_addr = proc->buffer + i * PAGE_SIZE;
3121 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
3122 "%s: %d: page %d at %p not freed\n",
3123 __func__, proc->pid, i, page_addr);
3124 unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
3125 __free_page(proc->pages[i]);
3129 vfree(proc->buffer);
3132 put_task_struct(proc->tsk);
3134 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
3135 "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n",
3136 __func__, proc->pid, threads, nodes, incoming_refs,
3137 outgoing_refs, active_transactions, buffers, page_count);
3142 static void binder_deferred_func(struct work_struct *work)
3144 struct binder_proc *proc;
3145 struct files_struct *files;
3150 binder_lock(__func__);
3151 mutex_lock(&binder_deferred_lock);
3152 if (!hlist_empty(&binder_deferred_list)) {
3153 proc = hlist_entry(binder_deferred_list.first,
3154 struct binder_proc, deferred_work_node);
3155 hlist_del_init(&proc->deferred_work_node);
3156 defer = proc->deferred_work;
3157 proc->deferred_work = 0;
3162 mutex_unlock(&binder_deferred_lock);
3165 if (defer & BINDER_DEFERRED_PUT_FILES) {
3166 files = proc->files;
3171 if (defer & BINDER_DEFERRED_FLUSH)
3172 binder_deferred_flush(proc);
3174 if (defer & BINDER_DEFERRED_RELEASE)
3175 binder_deferred_release(proc); /* frees proc */
3177 binder_unlock(__func__);
3179 put_files_struct(files);
3182 static DECLARE_WORK(binder_deferred_work, binder_deferred_func);
3185 binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer)
3187 mutex_lock(&binder_deferred_lock);
3188 proc->deferred_work |= defer;
3189 if (hlist_unhashed(&proc->deferred_work_node)) {
3190 hlist_add_head(&proc->deferred_work_node,
3191 &binder_deferred_list);
3192 queue_work(binder_deferred_workqueue, &binder_deferred_work);
3194 mutex_unlock(&binder_deferred_lock);
3197 static void print_binder_transaction(struct seq_file *m, const char *prefix,
3198 struct binder_transaction *t)
3201 "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d",
3202 prefix, t->debug_id, t,
3203 t->from ? t->from->proc->pid : 0,
3204 t->from ? t->from->pid : 0,
3205 t->to_proc ? t->to_proc->pid : 0,
3206 t->to_thread ? t->to_thread->pid : 0,
3207 t->code, t->flags, t->priority, t->need_reply);
3208 if (t->buffer == NULL) {
3209 seq_puts(m, " buffer free\n");
3212 if (t->buffer->target_node)
3213 seq_printf(m, " node %d",
3214 t->buffer->target_node->debug_id);
3215 seq_printf(m, " size %zd:%zd data %p\n",
3216 t->buffer->data_size, t->buffer->offsets_size,
3220 static void print_binder_buffer(struct seq_file *m, const char *prefix,
3221 struct binder_buffer *buffer)
3223 seq_printf(m, "%s %d: %p size %zd:%zd %s\n",
3224 prefix, buffer->debug_id, buffer->data,
3225 buffer->data_size, buffer->offsets_size,
3226 buffer->transaction ? "active" : "delivered");
3229 static void print_binder_work(struct seq_file *m, const char *prefix,
3230 const char *transaction_prefix,
3231 struct binder_work *w)
3233 struct binder_node *node;
3234 struct binder_transaction *t;
3237 case BINDER_WORK_TRANSACTION:
3238 t = container_of(w, struct binder_transaction, work);
3239 print_binder_transaction(m, transaction_prefix, t);
3241 case BINDER_WORK_TRANSACTION_COMPLETE:
3242 seq_printf(m, "%stransaction complete\n", prefix);
3244 case BINDER_WORK_NODE:
3245 node = container_of(w, struct binder_node, work);
3246 seq_printf(m, "%snode work %d: u%016llx c%016llx\n",
3247 prefix, node->debug_id,
3248 (u64)node->ptr, (u64)node->cookie);
3250 case BINDER_WORK_DEAD_BINDER:
3251 seq_printf(m, "%shas dead binder\n", prefix);
3253 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
3254 seq_printf(m, "%shas cleared dead binder\n", prefix);
3256 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
3257 seq_printf(m, "%shas cleared death notification\n", prefix);
3260 seq_printf(m, "%sunknown work: type %d\n", prefix, w->type);
3265 static void print_binder_thread(struct seq_file *m,
3266 struct binder_thread *thread,
3269 struct binder_transaction *t;
3270 struct binder_work *w;
3271 size_t start_pos = m->count;
3274 seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper);
3275 header_pos = m->count;
3276 t = thread->transaction_stack;
3278 if (t->from == thread) {
3279 print_binder_transaction(m,
3280 " outgoing transaction", t);
3282 } else if (t->to_thread == thread) {
3283 print_binder_transaction(m,
3284 " incoming transaction", t);
3287 print_binder_transaction(m, " bad transaction", t);
3291 list_for_each_entry(w, &thread->todo, entry) {
3292 print_binder_work(m, " ", " pending transaction", w);
3294 if (!print_always && m->count == header_pos)
3295 m->count = start_pos;
3298 static void print_binder_node(struct seq_file *m, struct binder_node *node)
3300 struct binder_ref *ref;
3301 struct binder_work *w;
3305 hlist_for_each_entry(ref, &node->refs, node_entry)
3308 seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d",
3309 node->debug_id, (u64)node->ptr, (u64)node->cookie,
3310 node->has_strong_ref, node->has_weak_ref,
3311 node->local_strong_refs, node->local_weak_refs,
3312 node->internal_strong_refs, count);
3314 seq_puts(m, " proc");
3315 hlist_for_each_entry(ref, &node->refs, node_entry)
3316 seq_printf(m, " %d", ref->proc->pid);
3319 list_for_each_entry(w, &node->async_todo, entry)
3320 print_binder_work(m, " ",
3321 " pending async transaction", w);
3324 static void print_binder_ref(struct seq_file *m, struct binder_ref *ref)
3326 seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n",
3327 ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ",
3328 ref->node->debug_id, ref->strong, ref->weak, ref->death);
3331 static void print_binder_proc(struct seq_file *m,
3332 struct binder_proc *proc, int print_all)
3334 struct binder_work *w;
3336 size_t start_pos = m->count;
3339 seq_printf(m, "proc %d\n", proc->pid);
3340 header_pos = m->count;
3342 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
3343 print_binder_thread(m, rb_entry(n, struct binder_thread,
3344 rb_node), print_all);
3345 for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
3346 struct binder_node *node = rb_entry(n, struct binder_node,
3348 if (print_all || node->has_async_transaction)
3349 print_binder_node(m, node);
3352 for (n = rb_first(&proc->refs_by_desc);
3355 print_binder_ref(m, rb_entry(n, struct binder_ref,
3358 for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
3359 print_binder_buffer(m, " buffer",
3360 rb_entry(n, struct binder_buffer, rb_node));
3361 list_for_each_entry(w, &proc->todo, entry)
3362 print_binder_work(m, " ", " pending transaction", w);
3363 list_for_each_entry(w, &proc->delivered_death, entry) {
3364 seq_puts(m, " has delivered dead binder\n");
3367 if (!print_all && m->count == header_pos)
3368 m->count = start_pos;
3371 static const char * const binder_return_strings[] = {
3376 "BR_ACQUIRE_RESULT",
3378 "BR_TRANSACTION_COMPLETE",
3383 "BR_ATTEMPT_ACQUIRE",
3388 "BR_CLEAR_DEATH_NOTIFICATION_DONE",
3392 static const char * const binder_command_strings[] = {
3395 "BC_ACQUIRE_RESULT",
3403 "BC_ATTEMPT_ACQUIRE",
3404 "BC_REGISTER_LOOPER",
3407 "BC_REQUEST_DEATH_NOTIFICATION",
3408 "BC_CLEAR_DEATH_NOTIFICATION",
3409 "BC_DEAD_BINDER_DONE"
3412 static const char * const binder_objstat_strings[] = {
3419 "transaction_complete"
3422 static void print_binder_stats(struct seq_file *m, const char *prefix,
3423 struct binder_stats *stats)
3427 BUILD_BUG_ON(ARRAY_SIZE(stats->bc) !=
3428 ARRAY_SIZE(binder_command_strings));
3429 for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
3431 seq_printf(m, "%s%s: %d\n", prefix,
3432 binder_command_strings[i], stats->bc[i]);
3435 BUILD_BUG_ON(ARRAY_SIZE(stats->br) !=
3436 ARRAY_SIZE(binder_return_strings));
3437 for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
3439 seq_printf(m, "%s%s: %d\n", prefix,
3440 binder_return_strings[i], stats->br[i]);
3443 BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
3444 ARRAY_SIZE(binder_objstat_strings));
3445 BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
3446 ARRAY_SIZE(stats->obj_deleted));
3447 for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
3448 if (stats->obj_created[i] || stats->obj_deleted[i])
3449 seq_printf(m, "%s%s: active %d total %d\n", prefix,
3450 binder_objstat_strings[i],
3451 stats->obj_created[i] - stats->obj_deleted[i],
3452 stats->obj_created[i]);
3456 static void print_binder_proc_stats(struct seq_file *m,
3457 struct binder_proc *proc)
3459 struct binder_work *w;
3461 int count, strong, weak;
3463 seq_printf(m, "proc %d\n", proc->pid);
3465 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
3467 seq_printf(m, " threads: %d\n", count);
3468 seq_printf(m, " requested threads: %d+%d/%d\n"
3469 " ready threads %d\n"
3470 " free async space %zd\n", proc->requested_threads,
3471 proc->requested_threads_started, proc->max_threads,
3472 proc->ready_threads, proc->free_async_space);
3474 for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
3476 seq_printf(m, " nodes: %d\n", count);
3480 for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
3481 struct binder_ref *ref = rb_entry(n, struct binder_ref,
3484 strong += ref->strong;
3487 seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak);
3490 for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
3492 seq_printf(m, " buffers: %d\n", count);
3495 list_for_each_entry(w, &proc->todo, entry) {
3497 case BINDER_WORK_TRANSACTION:
3504 seq_printf(m, " pending transactions: %d\n", count);
3506 print_binder_stats(m, " ", &proc->stats);
3510 static int binder_state_show(struct seq_file *m, void *unused)
3512 struct binder_proc *proc;
3513 struct binder_node *node;
3514 int do_lock = !binder_debug_no_lock;
3517 binder_lock(__func__);
3519 seq_puts(m, "binder state:\n");
3521 if (!hlist_empty(&binder_dead_nodes))
3522 seq_puts(m, "dead nodes:\n");
3523 hlist_for_each_entry(node, &binder_dead_nodes, dead_node)
3524 print_binder_node(m, node);
3526 hlist_for_each_entry(proc, &binder_procs, proc_node)
3527 print_binder_proc(m, proc, 1);
3529 binder_unlock(__func__);
3533 static int binder_stats_show(struct seq_file *m, void *unused)
3535 struct binder_proc *proc;
3536 int do_lock = !binder_debug_no_lock;
3539 binder_lock(__func__);
3541 seq_puts(m, "binder stats:\n");
3543 print_binder_stats(m, "", &binder_stats);
3545 hlist_for_each_entry(proc, &binder_procs, proc_node)
3546 print_binder_proc_stats(m, proc);
3548 binder_unlock(__func__);
3552 static int binder_transactions_show(struct seq_file *m, void *unused)
3554 struct binder_proc *proc;
3555 int do_lock = !binder_debug_no_lock;
3558 binder_lock(__func__);
3560 seq_puts(m, "binder transactions:\n");
3561 hlist_for_each_entry(proc, &binder_procs, proc_node)
3562 print_binder_proc(m, proc, 0);
3564 binder_unlock(__func__);
3568 static int binder_proc_show(struct seq_file *m, void *unused)
3570 struct binder_proc *proc = m->private;
3571 int do_lock = !binder_debug_no_lock;
3574 binder_lock(__func__);
3575 seq_puts(m, "binder proc state:\n");
3576 print_binder_proc(m, proc, 1);
3578 binder_unlock(__func__);
3582 static void print_binder_transaction_log_entry(struct seq_file *m,
3583 struct binder_transaction_log_entry *e)
3586 "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n",
3587 e->debug_id, (e->call_type == 2) ? "reply" :
3588 ((e->call_type == 1) ? "async" : "call "), e->from_proc,
3589 e->from_thread, e->to_proc, e->to_thread, e->to_node,
3590 e->target_handle, e->data_size, e->offsets_size);
3593 static int binder_transaction_log_show(struct seq_file *m, void *unused)
3595 struct binder_transaction_log *log = m->private;
3599 for (i = log->next; i < ARRAY_SIZE(log->entry); i++)
3600 print_binder_transaction_log_entry(m, &log->entry[i]);
3602 for (i = 0; i < log->next; i++)
3603 print_binder_transaction_log_entry(m, &log->entry[i]);
3607 static const struct file_operations binder_fops = {
3608 .owner = THIS_MODULE,
3609 .poll = binder_poll,
3610 .unlocked_ioctl = binder_ioctl,
3611 .compat_ioctl = binder_ioctl,
3612 .mmap = binder_mmap,
3613 .open = binder_open,
3614 .flush = binder_flush,
3615 .release = binder_release,
3618 static struct miscdevice binder_miscdev = {
3619 .minor = MISC_DYNAMIC_MINOR,
3621 .fops = &binder_fops
3624 BINDER_DEBUG_ENTRY(state);
3625 BINDER_DEBUG_ENTRY(stats);
3626 BINDER_DEBUG_ENTRY(transactions);
3627 BINDER_DEBUG_ENTRY(transaction_log);
3629 static int __init binder_init(void)
3633 binder_deferred_workqueue = create_singlethread_workqueue("binder");
3634 if (!binder_deferred_workqueue)
3637 binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL);
3638 if (binder_debugfs_dir_entry_root)
3639 binder_debugfs_dir_entry_proc = debugfs_create_dir("proc",
3640 binder_debugfs_dir_entry_root);
3641 ret = misc_register(&binder_miscdev);
3642 if (binder_debugfs_dir_entry_root) {
3643 debugfs_create_file("state",
3645 binder_debugfs_dir_entry_root,
3647 &binder_state_fops);
3648 debugfs_create_file("stats",
3650 binder_debugfs_dir_entry_root,
3652 &binder_stats_fops);
3653 debugfs_create_file("transactions",
3655 binder_debugfs_dir_entry_root,
3657 &binder_transactions_fops);
3658 debugfs_create_file("transaction_log",
3660 binder_debugfs_dir_entry_root,
3661 &binder_transaction_log,
3662 &binder_transaction_log_fops);
3663 debugfs_create_file("failed_transaction_log",
3665 binder_debugfs_dir_entry_root,
3666 &binder_transaction_log_failed,
3667 &binder_transaction_log_fops);
3672 device_initcall(binder_init);
3674 #define CREATE_TRACE_POINTS
3675 #include "binder_trace.h"
3677 MODULE_LICENSE("GPL v2");