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/signal.h>
35 #include <linux/sched/mm.h>
36 #include <linux/seq_file.h>
37 #include <linux/uaccess.h>
38 #include <linux/vmalloc.h>
39 #include <linux/slab.h>
40 #include <linux/pid_namespace.h>
41 #include <linux/security.h>
43 #ifdef CONFIG_ANDROID_BINDER_IPC_32BIT
44 #define BINDER_IPC_32BIT 1
47 #include <uapi/linux/android/binder.h>
48 #include "binder_trace.h"
50 static DEFINE_MUTEX(binder_main_lock
);
51 static DEFINE_MUTEX(binder_deferred_lock
);
52 static DEFINE_MUTEX(binder_mmap_lock
);
54 static HLIST_HEAD(binder_devices
);
55 static HLIST_HEAD(binder_procs
);
56 static HLIST_HEAD(binder_deferred_list
);
57 static HLIST_HEAD(binder_dead_nodes
);
59 static struct dentry
*binder_debugfs_dir_entry_root
;
60 static struct dentry
*binder_debugfs_dir_entry_proc
;
61 static int binder_last_id
;
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 char *binder_devices_param
= CONFIG_ANDROID_BINDER_DEVICES
;
119 module_param_named(devices
, binder_devices_param
, charp
, 0444);
121 static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait
);
122 static int binder_stop_on_user_error
;
124 static int binder_set_stop_on_user_error(const char *val
,
125 struct kernel_param
*kp
)
129 ret
= param_set_int(val
, kp
);
130 if (binder_stop_on_user_error
< 2)
131 wake_up(&binder_user_error_wait
);
134 module_param_call(stop_on_user_error
, binder_set_stop_on_user_error
,
135 param_get_int
, &binder_stop_on_user_error
, S_IWUSR
| S_IRUGO
);
137 #define binder_debug(mask, x...) \
139 if (binder_debug_mask & mask) \
143 #define binder_user_error(x...) \
145 if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
147 if (binder_stop_on_user_error) \
148 binder_stop_on_user_error = 2; \
151 #define to_flat_binder_object(hdr) \
152 container_of(hdr, struct flat_binder_object, hdr)
154 #define to_binder_fd_object(hdr) container_of(hdr, struct binder_fd_object, hdr)
156 #define to_binder_buffer_object(hdr) \
157 container_of(hdr, struct binder_buffer_object, hdr)
159 #define to_binder_fd_array_object(hdr) \
160 container_of(hdr, struct binder_fd_array_object, hdr)
162 enum binder_stat_types
{
168 BINDER_STAT_TRANSACTION
,
169 BINDER_STAT_TRANSACTION_COMPLETE
,
173 struct binder_stats
{
174 int br
[_IOC_NR(BR_FAILED_REPLY
) + 1];
175 int bc
[_IOC_NR(BC_REPLY_SG
) + 1];
176 int obj_created
[BINDER_STAT_COUNT
];
177 int obj_deleted
[BINDER_STAT_COUNT
];
180 static struct binder_stats binder_stats
;
182 static inline void binder_stats_deleted(enum binder_stat_types type
)
184 binder_stats
.obj_deleted
[type
]++;
187 static inline void binder_stats_created(enum binder_stat_types type
)
189 binder_stats
.obj_created
[type
]++;
192 struct binder_transaction_log_entry
{
203 const char *context_name
;
205 struct binder_transaction_log
{
208 struct binder_transaction_log_entry entry
[32];
210 static struct binder_transaction_log binder_transaction_log
;
211 static struct binder_transaction_log binder_transaction_log_failed
;
213 static struct binder_transaction_log_entry
*binder_transaction_log_add(
214 struct binder_transaction_log
*log
)
216 struct binder_transaction_log_entry
*e
;
218 e
= &log
->entry
[log
->next
];
219 memset(e
, 0, sizeof(*e
));
221 if (log
->next
== ARRAY_SIZE(log
->entry
)) {
228 struct binder_context
{
229 struct binder_node
*binder_context_mgr_node
;
230 kuid_t binder_context_mgr_uid
;
234 struct binder_device
{
235 struct hlist_node hlist
;
236 struct miscdevice miscdev
;
237 struct binder_context context
;
241 struct list_head entry
;
243 BINDER_WORK_TRANSACTION
= 1,
244 BINDER_WORK_TRANSACTION_COMPLETE
,
246 BINDER_WORK_DEAD_BINDER
,
247 BINDER_WORK_DEAD_BINDER_AND_CLEAR
,
248 BINDER_WORK_CLEAR_DEATH_NOTIFICATION
,
254 struct binder_work work
;
256 struct rb_node rb_node
;
257 struct hlist_node dead_node
;
259 struct binder_proc
*proc
;
260 struct hlist_head refs
;
261 int internal_strong_refs
;
263 int local_strong_refs
;
264 binder_uintptr_t ptr
;
265 binder_uintptr_t cookie
;
266 unsigned has_strong_ref
:1;
267 unsigned pending_strong_ref
:1;
268 unsigned has_weak_ref
:1;
269 unsigned pending_weak_ref
:1;
270 unsigned has_async_transaction
:1;
271 unsigned accept_fds
:1;
272 unsigned min_priority
:8;
273 struct list_head async_todo
;
276 struct binder_ref_death
{
277 struct binder_work work
;
278 binder_uintptr_t cookie
;
282 /* Lookups needed: */
283 /* node + proc => ref (transaction) */
284 /* desc + proc => ref (transaction, inc/dec ref) */
285 /* node => refs + procs (proc exit) */
287 struct rb_node rb_node_desc
;
288 struct rb_node rb_node_node
;
289 struct hlist_node node_entry
;
290 struct binder_proc
*proc
;
291 struct binder_node
*node
;
295 struct binder_ref_death
*death
;
298 struct binder_buffer
{
299 struct list_head entry
; /* free and allocated entries by address */
300 struct rb_node rb_node
; /* free entry by size or allocated entry */
303 unsigned allow_user_free
:1;
304 unsigned async_transaction
:1;
305 unsigned debug_id
:29;
307 struct binder_transaction
*transaction
;
309 struct binder_node
*target_node
;
312 size_t extra_buffers_size
;
316 enum binder_deferred_state
{
317 BINDER_DEFERRED_PUT_FILES
= 0x01,
318 BINDER_DEFERRED_FLUSH
= 0x02,
319 BINDER_DEFERRED_RELEASE
= 0x04,
323 struct hlist_node proc_node
;
324 struct rb_root threads
;
325 struct rb_root nodes
;
326 struct rb_root refs_by_desc
;
327 struct rb_root refs_by_node
;
329 struct vm_area_struct
*vma
;
330 struct mm_struct
*vma_vm_mm
;
331 struct task_struct
*tsk
;
332 struct files_struct
*files
;
333 struct hlist_node deferred_work_node
;
336 ptrdiff_t user_buffer_offset
;
338 struct list_head buffers
;
339 struct rb_root free_buffers
;
340 struct rb_root allocated_buffers
;
341 size_t free_async_space
;
345 uint32_t buffer_free
;
346 struct list_head todo
;
347 wait_queue_head_t wait
;
348 struct binder_stats stats
;
349 struct list_head delivered_death
;
351 int requested_threads
;
352 int requested_threads_started
;
354 long default_priority
;
355 struct dentry
*debugfs_entry
;
356 struct binder_context
*context
;
360 BINDER_LOOPER_STATE_REGISTERED
= 0x01,
361 BINDER_LOOPER_STATE_ENTERED
= 0x02,
362 BINDER_LOOPER_STATE_EXITED
= 0x04,
363 BINDER_LOOPER_STATE_INVALID
= 0x08,
364 BINDER_LOOPER_STATE_WAITING
= 0x10,
365 BINDER_LOOPER_STATE_NEED_RETURN
= 0x20
368 struct binder_thread
{
369 struct binder_proc
*proc
;
370 struct rb_node rb_node
;
373 struct binder_transaction
*transaction_stack
;
374 struct list_head todo
;
375 uint32_t return_error
; /* Write failed, return error code in read buf */
376 uint32_t return_error2
; /* Write failed, return error code in read */
377 /* buffer. Used when sending a reply to a dead process that */
378 /* we are also waiting on */
379 wait_queue_head_t wait
;
380 struct binder_stats stats
;
383 struct binder_transaction
{
385 struct binder_work work
;
386 struct binder_thread
*from
;
387 struct binder_transaction
*from_parent
;
388 struct binder_proc
*to_proc
;
389 struct binder_thread
*to_thread
;
390 struct binder_transaction
*to_parent
;
391 unsigned need_reply
:1;
392 /* unsigned is_dead:1; */ /* not used at the moment */
394 struct binder_buffer
*buffer
;
403 binder_defer_work(struct binder_proc
*proc
, enum binder_deferred_state defer
);
405 static int task_get_unused_fd_flags(struct binder_proc
*proc
, int flags
)
407 struct files_struct
*files
= proc
->files
;
408 unsigned long rlim_cur
;
414 if (!lock_task_sighand(proc
->tsk
, &irqs
))
417 rlim_cur
= task_rlimit(proc
->tsk
, RLIMIT_NOFILE
);
418 unlock_task_sighand(proc
->tsk
, &irqs
);
420 return __alloc_fd(files
, 0, rlim_cur
, flags
);
424 * copied from fd_install
426 static void task_fd_install(
427 struct binder_proc
*proc
, unsigned int fd
, struct file
*file
)
430 __fd_install(proc
->files
, fd
, file
);
434 * copied from sys_close
436 static long task_close_fd(struct binder_proc
*proc
, unsigned int fd
)
440 if (proc
->files
== NULL
)
443 retval
= __close_fd(proc
->files
, fd
);
444 /* can't restart close syscall because file table entry was cleared */
445 if (unlikely(retval
== -ERESTARTSYS
||
446 retval
== -ERESTARTNOINTR
||
447 retval
== -ERESTARTNOHAND
||
448 retval
== -ERESTART_RESTARTBLOCK
))
454 static inline void binder_lock(const char *tag
)
456 trace_binder_lock(tag
);
457 mutex_lock(&binder_main_lock
);
458 trace_binder_locked(tag
);
461 static inline void binder_unlock(const char *tag
)
463 trace_binder_unlock(tag
);
464 mutex_unlock(&binder_main_lock
);
467 static void binder_set_nice(long nice
)
471 if (can_nice(current
, nice
)) {
472 set_user_nice(current
, nice
);
475 min_nice
= rlimit_to_nice(current
->signal
->rlim
[RLIMIT_NICE
].rlim_cur
);
476 binder_debug(BINDER_DEBUG_PRIORITY_CAP
,
477 "%d: nice value %ld not allowed use %ld instead\n",
478 current
->pid
, nice
, min_nice
);
479 set_user_nice(current
, min_nice
);
480 if (min_nice
<= MAX_NICE
)
482 binder_user_error("%d RLIMIT_NICE not set\n", current
->pid
);
485 static size_t binder_buffer_size(struct binder_proc
*proc
,
486 struct binder_buffer
*buffer
)
488 if (list_is_last(&buffer
->entry
, &proc
->buffers
))
489 return proc
->buffer
+ proc
->buffer_size
- (void *)buffer
->data
;
490 return (size_t)list_entry(buffer
->entry
.next
,
491 struct binder_buffer
, entry
) - (size_t)buffer
->data
;
494 static void binder_insert_free_buffer(struct binder_proc
*proc
,
495 struct binder_buffer
*new_buffer
)
497 struct rb_node
**p
= &proc
->free_buffers
.rb_node
;
498 struct rb_node
*parent
= NULL
;
499 struct binder_buffer
*buffer
;
501 size_t new_buffer_size
;
503 BUG_ON(!new_buffer
->free
);
505 new_buffer_size
= binder_buffer_size(proc
, new_buffer
);
507 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
508 "%d: add free buffer, size %zd, at %p\n",
509 proc
->pid
, new_buffer_size
, new_buffer
);
513 buffer
= rb_entry(parent
, struct binder_buffer
, rb_node
);
514 BUG_ON(!buffer
->free
);
516 buffer_size
= binder_buffer_size(proc
, buffer
);
518 if (new_buffer_size
< buffer_size
)
519 p
= &parent
->rb_left
;
521 p
= &parent
->rb_right
;
523 rb_link_node(&new_buffer
->rb_node
, parent
, p
);
524 rb_insert_color(&new_buffer
->rb_node
, &proc
->free_buffers
);
527 static void binder_insert_allocated_buffer(struct binder_proc
*proc
,
528 struct binder_buffer
*new_buffer
)
530 struct rb_node
**p
= &proc
->allocated_buffers
.rb_node
;
531 struct rb_node
*parent
= NULL
;
532 struct binder_buffer
*buffer
;
534 BUG_ON(new_buffer
->free
);
538 buffer
= rb_entry(parent
, struct binder_buffer
, rb_node
);
539 BUG_ON(buffer
->free
);
541 if (new_buffer
< buffer
)
542 p
= &parent
->rb_left
;
543 else if (new_buffer
> buffer
)
544 p
= &parent
->rb_right
;
548 rb_link_node(&new_buffer
->rb_node
, parent
, p
);
549 rb_insert_color(&new_buffer
->rb_node
, &proc
->allocated_buffers
);
552 static struct binder_buffer
*binder_buffer_lookup(struct binder_proc
*proc
,
555 struct rb_node
*n
= proc
->allocated_buffers
.rb_node
;
556 struct binder_buffer
*buffer
;
557 struct binder_buffer
*kern_ptr
;
559 kern_ptr
= (struct binder_buffer
*)(user_ptr
- proc
->user_buffer_offset
560 - offsetof(struct binder_buffer
, data
));
563 buffer
= rb_entry(n
, struct binder_buffer
, rb_node
);
564 BUG_ON(buffer
->free
);
566 if (kern_ptr
< buffer
)
568 else if (kern_ptr
> buffer
)
576 static int binder_update_page_range(struct binder_proc
*proc
, int allocate
,
577 void *start
, void *end
,
578 struct vm_area_struct
*vma
)
581 unsigned long user_page_addr
;
583 struct mm_struct
*mm
;
585 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
586 "%d: %s pages %p-%p\n", proc
->pid
,
587 allocate
? "allocate" : "free", start
, end
);
592 trace_binder_update_page_range(proc
, allocate
, start
, end
);
597 mm
= get_task_mm(proc
->tsk
);
600 down_write(&mm
->mmap_sem
);
602 if (vma
&& mm
!= proc
->vma_vm_mm
) {
603 pr_err("%d: vma mm and task mm mismatch\n",
613 pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n",
618 for (page_addr
= start
; page_addr
< end
; page_addr
+= PAGE_SIZE
) {
621 page
= &proc
->pages
[(page_addr
- proc
->buffer
) / PAGE_SIZE
];
624 *page
= alloc_page(GFP_KERNEL
| __GFP_HIGHMEM
| __GFP_ZERO
);
626 pr_err("%d: binder_alloc_buf failed for page at %p\n",
627 proc
->pid
, page_addr
);
628 goto err_alloc_page_failed
;
630 ret
= map_kernel_range_noflush((unsigned long)page_addr
,
631 PAGE_SIZE
, PAGE_KERNEL
, page
);
632 flush_cache_vmap((unsigned long)page_addr
,
633 (unsigned long)page_addr
+ PAGE_SIZE
);
635 pr_err("%d: binder_alloc_buf failed to map page at %p in kernel\n",
636 proc
->pid
, page_addr
);
637 goto err_map_kernel_failed
;
640 (uintptr_t)page_addr
+ proc
->user_buffer_offset
;
641 ret
= vm_insert_page(vma
, user_page_addr
, page
[0]);
643 pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
644 proc
->pid
, user_page_addr
);
645 goto err_vm_insert_page_failed
;
647 /* vm_insert_page does not seem to increment the refcount */
650 up_write(&mm
->mmap_sem
);
656 for (page_addr
= end
- PAGE_SIZE
; page_addr
>= start
;
657 page_addr
-= PAGE_SIZE
) {
658 page
= &proc
->pages
[(page_addr
- proc
->buffer
) / PAGE_SIZE
];
660 zap_page_range(vma
, (uintptr_t)page_addr
+
661 proc
->user_buffer_offset
, PAGE_SIZE
);
662 err_vm_insert_page_failed
:
663 unmap_kernel_range((unsigned long)page_addr
, PAGE_SIZE
);
664 err_map_kernel_failed
:
667 err_alloc_page_failed
:
672 up_write(&mm
->mmap_sem
);
678 static struct binder_buffer
*binder_alloc_buf(struct binder_proc
*proc
,
681 size_t extra_buffers_size
,
684 struct rb_node
*n
= proc
->free_buffers
.rb_node
;
685 struct binder_buffer
*buffer
;
687 struct rb_node
*best_fit
= NULL
;
690 size_t size
, data_offsets_size
;
692 if (proc
->vma
== NULL
) {
693 pr_err("%d: binder_alloc_buf, no vma\n",
698 data_offsets_size
= ALIGN(data_size
, sizeof(void *)) +
699 ALIGN(offsets_size
, sizeof(void *));
701 if (data_offsets_size
< data_size
|| data_offsets_size
< offsets_size
) {
702 binder_user_error("%d: got transaction with invalid size %zd-%zd\n",
703 proc
->pid
, data_size
, offsets_size
);
706 size
= data_offsets_size
+ ALIGN(extra_buffers_size
, sizeof(void *));
707 if (size
< data_offsets_size
|| size
< extra_buffers_size
) {
708 binder_user_error("%d: got transaction with invalid extra_buffers_size %zd\n",
709 proc
->pid
, extra_buffers_size
);
713 proc
->free_async_space
< size
+ sizeof(struct binder_buffer
)) {
714 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
715 "%d: binder_alloc_buf size %zd failed, no async space left\n",
721 buffer
= rb_entry(n
, struct binder_buffer
, rb_node
);
722 BUG_ON(!buffer
->free
);
723 buffer_size
= binder_buffer_size(proc
, buffer
);
725 if (size
< buffer_size
) {
728 } else if (size
> buffer_size
)
735 if (best_fit
== NULL
) {
736 pr_err("%d: binder_alloc_buf size %zd failed, no address space\n",
741 buffer
= rb_entry(best_fit
, struct binder_buffer
, rb_node
);
742 buffer_size
= binder_buffer_size(proc
, buffer
);
745 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
746 "%d: binder_alloc_buf size %zd got buffer %p size %zd\n",
747 proc
->pid
, size
, buffer
, buffer_size
);
750 (void *)(((uintptr_t)buffer
->data
+ buffer_size
) & PAGE_MASK
);
752 if (size
+ sizeof(struct binder_buffer
) + 4 >= buffer_size
)
753 buffer_size
= size
; /* no room for other buffers */
755 buffer_size
= size
+ sizeof(struct binder_buffer
);
758 (void *)PAGE_ALIGN((uintptr_t)buffer
->data
+ buffer_size
);
759 if (end_page_addr
> has_page_addr
)
760 end_page_addr
= has_page_addr
;
761 if (binder_update_page_range(proc
, 1,
762 (void *)PAGE_ALIGN((uintptr_t)buffer
->data
), end_page_addr
, NULL
))
765 rb_erase(best_fit
, &proc
->free_buffers
);
767 binder_insert_allocated_buffer(proc
, buffer
);
768 if (buffer_size
!= size
) {
769 struct binder_buffer
*new_buffer
= (void *)buffer
->data
+ size
;
771 list_add(&new_buffer
->entry
, &buffer
->entry
);
772 new_buffer
->free
= 1;
773 binder_insert_free_buffer(proc
, new_buffer
);
775 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
776 "%d: binder_alloc_buf size %zd got %p\n",
777 proc
->pid
, size
, buffer
);
778 buffer
->data_size
= data_size
;
779 buffer
->offsets_size
= offsets_size
;
780 buffer
->extra_buffers_size
= extra_buffers_size
;
781 buffer
->async_transaction
= is_async
;
783 proc
->free_async_space
-= size
+ sizeof(struct binder_buffer
);
784 binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC
,
785 "%d: binder_alloc_buf size %zd async free %zd\n",
786 proc
->pid
, size
, proc
->free_async_space
);
792 static void *buffer_start_page(struct binder_buffer
*buffer
)
794 return (void *)((uintptr_t)buffer
& PAGE_MASK
);
797 static void *buffer_end_page(struct binder_buffer
*buffer
)
799 return (void *)(((uintptr_t)(buffer
+ 1) - 1) & PAGE_MASK
);
802 static void binder_delete_free_buffer(struct binder_proc
*proc
,
803 struct binder_buffer
*buffer
)
805 struct binder_buffer
*prev
, *next
= NULL
;
806 int free_page_end
= 1;
807 int free_page_start
= 1;
809 BUG_ON(proc
->buffers
.next
== &buffer
->entry
);
810 prev
= list_entry(buffer
->entry
.prev
, struct binder_buffer
, entry
);
812 if (buffer_end_page(prev
) == buffer_start_page(buffer
)) {
814 if (buffer_end_page(prev
) == buffer_end_page(buffer
))
816 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
817 "%d: merge free, buffer %p share page with %p\n",
818 proc
->pid
, buffer
, prev
);
821 if (!list_is_last(&buffer
->entry
, &proc
->buffers
)) {
822 next
= list_entry(buffer
->entry
.next
,
823 struct binder_buffer
, entry
);
824 if (buffer_start_page(next
) == buffer_end_page(buffer
)) {
826 if (buffer_start_page(next
) ==
827 buffer_start_page(buffer
))
829 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
830 "%d: merge free, buffer %p share page with %p\n",
831 proc
->pid
, buffer
, prev
);
834 list_del(&buffer
->entry
);
835 if (free_page_start
|| free_page_end
) {
836 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
837 "%d: merge free, buffer %p do not share page%s%s with %p or %p\n",
838 proc
->pid
, buffer
, free_page_start
? "" : " end",
839 free_page_end
? "" : " start", prev
, next
);
840 binder_update_page_range(proc
, 0, free_page_start
?
841 buffer_start_page(buffer
) : buffer_end_page(buffer
),
842 (free_page_end
? buffer_end_page(buffer
) :
843 buffer_start_page(buffer
)) + PAGE_SIZE
, NULL
);
847 static void binder_free_buf(struct binder_proc
*proc
,
848 struct binder_buffer
*buffer
)
850 size_t size
, buffer_size
;
852 buffer_size
= binder_buffer_size(proc
, buffer
);
854 size
= ALIGN(buffer
->data_size
, sizeof(void *)) +
855 ALIGN(buffer
->offsets_size
, sizeof(void *)) +
856 ALIGN(buffer
->extra_buffers_size
, sizeof(void *));
858 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
859 "%d: binder_free_buf %p size %zd buffer_size %zd\n",
860 proc
->pid
, buffer
, size
, buffer_size
);
862 BUG_ON(buffer
->free
);
863 BUG_ON(size
> buffer_size
);
864 BUG_ON(buffer
->transaction
!= NULL
);
865 BUG_ON((void *)buffer
< proc
->buffer
);
866 BUG_ON((void *)buffer
> proc
->buffer
+ proc
->buffer_size
);
868 if (buffer
->async_transaction
) {
869 proc
->free_async_space
+= size
+ sizeof(struct binder_buffer
);
871 binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC
,
872 "%d: binder_free_buf size %zd async free %zd\n",
873 proc
->pid
, size
, proc
->free_async_space
);
876 binder_update_page_range(proc
, 0,
877 (void *)PAGE_ALIGN((uintptr_t)buffer
->data
),
878 (void *)(((uintptr_t)buffer
->data
+ buffer_size
) & PAGE_MASK
),
880 rb_erase(&buffer
->rb_node
, &proc
->allocated_buffers
);
882 if (!list_is_last(&buffer
->entry
, &proc
->buffers
)) {
883 struct binder_buffer
*next
= list_entry(buffer
->entry
.next
,
884 struct binder_buffer
, entry
);
887 rb_erase(&next
->rb_node
, &proc
->free_buffers
);
888 binder_delete_free_buffer(proc
, next
);
891 if (proc
->buffers
.next
!= &buffer
->entry
) {
892 struct binder_buffer
*prev
= list_entry(buffer
->entry
.prev
,
893 struct binder_buffer
, entry
);
896 binder_delete_free_buffer(proc
, buffer
);
897 rb_erase(&prev
->rb_node
, &proc
->free_buffers
);
901 binder_insert_free_buffer(proc
, buffer
);
904 static struct binder_node
*binder_get_node(struct binder_proc
*proc
,
905 binder_uintptr_t ptr
)
907 struct rb_node
*n
= proc
->nodes
.rb_node
;
908 struct binder_node
*node
;
911 node
= rb_entry(n
, struct binder_node
, rb_node
);
915 else if (ptr
> node
->ptr
)
923 static struct binder_node
*binder_new_node(struct binder_proc
*proc
,
924 binder_uintptr_t ptr
,
925 binder_uintptr_t cookie
)
927 struct rb_node
**p
= &proc
->nodes
.rb_node
;
928 struct rb_node
*parent
= NULL
;
929 struct binder_node
*node
;
933 node
= rb_entry(parent
, struct binder_node
, rb_node
);
937 else if (ptr
> node
->ptr
)
943 node
= kzalloc(sizeof(*node
), GFP_KERNEL
);
946 binder_stats_created(BINDER_STAT_NODE
);
947 rb_link_node(&node
->rb_node
, parent
, p
);
948 rb_insert_color(&node
->rb_node
, &proc
->nodes
);
949 node
->debug_id
= ++binder_last_id
;
952 node
->cookie
= cookie
;
953 node
->work
.type
= BINDER_WORK_NODE
;
954 INIT_LIST_HEAD(&node
->work
.entry
);
955 INIT_LIST_HEAD(&node
->async_todo
);
956 binder_debug(BINDER_DEBUG_INTERNAL_REFS
,
957 "%d:%d node %d u%016llx c%016llx created\n",
958 proc
->pid
, current
->pid
, node
->debug_id
,
959 (u64
)node
->ptr
, (u64
)node
->cookie
);
963 static int binder_inc_node(struct binder_node
*node
, int strong
, int internal
,
964 struct list_head
*target_list
)
968 if (target_list
== NULL
&&
969 node
->internal_strong_refs
== 0 &&
971 node
== node
->proc
->context
->binder_context_mgr_node
&&
972 node
->has_strong_ref
)) {
973 pr_err("invalid inc strong node for %d\n",
977 node
->internal_strong_refs
++;
979 node
->local_strong_refs
++;
980 if (!node
->has_strong_ref
&& target_list
) {
981 list_del_init(&node
->work
.entry
);
982 list_add_tail(&node
->work
.entry
, target_list
);
986 node
->local_weak_refs
++;
987 if (!node
->has_weak_ref
&& list_empty(&node
->work
.entry
)) {
988 if (target_list
== NULL
) {
989 pr_err("invalid inc weak node for %d\n",
993 list_add_tail(&node
->work
.entry
, target_list
);
999 static int binder_dec_node(struct binder_node
*node
, int strong
, int internal
)
1003 node
->internal_strong_refs
--;
1005 node
->local_strong_refs
--;
1006 if (node
->local_strong_refs
|| node
->internal_strong_refs
)
1010 node
->local_weak_refs
--;
1011 if (node
->local_weak_refs
|| !hlist_empty(&node
->refs
))
1014 if (node
->proc
&& (node
->has_strong_ref
|| node
->has_weak_ref
)) {
1015 if (list_empty(&node
->work
.entry
)) {
1016 list_add_tail(&node
->work
.entry
, &node
->proc
->todo
);
1017 wake_up_interruptible(&node
->proc
->wait
);
1020 if (hlist_empty(&node
->refs
) && !node
->local_strong_refs
&&
1021 !node
->local_weak_refs
) {
1022 list_del_init(&node
->work
.entry
);
1024 rb_erase(&node
->rb_node
, &node
->proc
->nodes
);
1025 binder_debug(BINDER_DEBUG_INTERNAL_REFS
,
1026 "refless node %d deleted\n",
1029 hlist_del(&node
->dead_node
);
1030 binder_debug(BINDER_DEBUG_INTERNAL_REFS
,
1031 "dead node %d deleted\n",
1035 binder_stats_deleted(BINDER_STAT_NODE
);
1043 static struct binder_ref
*binder_get_ref(struct binder_proc
*proc
,
1044 u32 desc
, bool need_strong_ref
)
1046 struct rb_node
*n
= proc
->refs_by_desc
.rb_node
;
1047 struct binder_ref
*ref
;
1050 ref
= rb_entry(n
, struct binder_ref
, rb_node_desc
);
1052 if (desc
< ref
->desc
) {
1054 } else if (desc
> ref
->desc
) {
1056 } else if (need_strong_ref
&& !ref
->strong
) {
1057 binder_user_error("tried to use weak ref as strong ref\n");
1066 static struct binder_ref
*binder_get_ref_for_node(struct binder_proc
*proc
,
1067 struct binder_node
*node
)
1070 struct rb_node
**p
= &proc
->refs_by_node
.rb_node
;
1071 struct rb_node
*parent
= NULL
;
1072 struct binder_ref
*ref
, *new_ref
;
1073 struct binder_context
*context
= proc
->context
;
1077 ref
= rb_entry(parent
, struct binder_ref
, rb_node_node
);
1079 if (node
< ref
->node
)
1081 else if (node
> ref
->node
)
1082 p
= &(*p
)->rb_right
;
1086 new_ref
= kzalloc(sizeof(*ref
), GFP_KERNEL
);
1087 if (new_ref
== NULL
)
1089 binder_stats_created(BINDER_STAT_REF
);
1090 new_ref
->debug_id
= ++binder_last_id
;
1091 new_ref
->proc
= proc
;
1092 new_ref
->node
= node
;
1093 rb_link_node(&new_ref
->rb_node_node
, parent
, p
);
1094 rb_insert_color(&new_ref
->rb_node_node
, &proc
->refs_by_node
);
1096 new_ref
->desc
= (node
== context
->binder_context_mgr_node
) ? 0 : 1;
1097 for (n
= rb_first(&proc
->refs_by_desc
); n
!= NULL
; n
= rb_next(n
)) {
1098 ref
= rb_entry(n
, struct binder_ref
, rb_node_desc
);
1099 if (ref
->desc
> new_ref
->desc
)
1101 new_ref
->desc
= ref
->desc
+ 1;
1104 p
= &proc
->refs_by_desc
.rb_node
;
1107 ref
= rb_entry(parent
, struct binder_ref
, rb_node_desc
);
1109 if (new_ref
->desc
< ref
->desc
)
1111 else if (new_ref
->desc
> ref
->desc
)
1112 p
= &(*p
)->rb_right
;
1116 rb_link_node(&new_ref
->rb_node_desc
, parent
, p
);
1117 rb_insert_color(&new_ref
->rb_node_desc
, &proc
->refs_by_desc
);
1119 hlist_add_head(&new_ref
->node_entry
, &node
->refs
);
1121 binder_debug(BINDER_DEBUG_INTERNAL_REFS
,
1122 "%d new ref %d desc %d for node %d\n",
1123 proc
->pid
, new_ref
->debug_id
, new_ref
->desc
,
1126 binder_debug(BINDER_DEBUG_INTERNAL_REFS
,
1127 "%d new ref %d desc %d for dead node\n",
1128 proc
->pid
, new_ref
->debug_id
, new_ref
->desc
);
1133 static void binder_delete_ref(struct binder_ref
*ref
)
1135 binder_debug(BINDER_DEBUG_INTERNAL_REFS
,
1136 "%d delete ref %d desc %d for node %d\n",
1137 ref
->proc
->pid
, ref
->debug_id
, ref
->desc
,
1138 ref
->node
->debug_id
);
1140 rb_erase(&ref
->rb_node_desc
, &ref
->proc
->refs_by_desc
);
1141 rb_erase(&ref
->rb_node_node
, &ref
->proc
->refs_by_node
);
1143 binder_dec_node(ref
->node
, 1, 1);
1144 hlist_del(&ref
->node_entry
);
1145 binder_dec_node(ref
->node
, 0, 1);
1147 binder_debug(BINDER_DEBUG_DEAD_BINDER
,
1148 "%d delete ref %d desc %d has death notification\n",
1149 ref
->proc
->pid
, ref
->debug_id
, ref
->desc
);
1150 list_del(&ref
->death
->work
.entry
);
1152 binder_stats_deleted(BINDER_STAT_DEATH
);
1155 binder_stats_deleted(BINDER_STAT_REF
);
1158 static int binder_inc_ref(struct binder_ref
*ref
, int strong
,
1159 struct list_head
*target_list
)
1164 if (ref
->strong
== 0) {
1165 ret
= binder_inc_node(ref
->node
, 1, 1, target_list
);
1171 if (ref
->weak
== 0) {
1172 ret
= binder_inc_node(ref
->node
, 0, 1, target_list
);
1182 static int binder_dec_ref(struct binder_ref
*ref
, int strong
)
1185 if (ref
->strong
== 0) {
1186 binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n",
1187 ref
->proc
->pid
, ref
->debug_id
,
1188 ref
->desc
, ref
->strong
, ref
->weak
);
1192 if (ref
->strong
== 0) {
1195 ret
= binder_dec_node(ref
->node
, strong
, 1);
1200 if (ref
->weak
== 0) {
1201 binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n",
1202 ref
->proc
->pid
, ref
->debug_id
,
1203 ref
->desc
, ref
->strong
, ref
->weak
);
1208 if (ref
->strong
== 0 && ref
->weak
== 0)
1209 binder_delete_ref(ref
);
1213 static void binder_pop_transaction(struct binder_thread
*target_thread
,
1214 struct binder_transaction
*t
)
1216 if (target_thread
) {
1217 BUG_ON(target_thread
->transaction_stack
!= t
);
1218 BUG_ON(target_thread
->transaction_stack
->from
!= target_thread
);
1219 target_thread
->transaction_stack
=
1220 target_thread
->transaction_stack
->from_parent
;
1225 t
->buffer
->transaction
= NULL
;
1227 binder_stats_deleted(BINDER_STAT_TRANSACTION
);
1230 static void binder_send_failed_reply(struct binder_transaction
*t
,
1231 uint32_t error_code
)
1233 struct binder_thread
*target_thread
;
1234 struct binder_transaction
*next
;
1236 BUG_ON(t
->flags
& TF_ONE_WAY
);
1238 target_thread
= t
->from
;
1239 if (target_thread
) {
1240 if (target_thread
->return_error
!= BR_OK
&&
1241 target_thread
->return_error2
== BR_OK
) {
1242 target_thread
->return_error2
=
1243 target_thread
->return_error
;
1244 target_thread
->return_error
= BR_OK
;
1246 if (target_thread
->return_error
== BR_OK
) {
1247 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION
,
1248 "send failed reply for transaction %d to %d:%d\n",
1250 target_thread
->proc
->pid
,
1251 target_thread
->pid
);
1253 binder_pop_transaction(target_thread
, t
);
1254 target_thread
->return_error
= error_code
;
1255 wake_up_interruptible(&target_thread
->wait
);
1257 pr_err("reply failed, target thread, %d:%d, has error code %d already\n",
1258 target_thread
->proc
->pid
,
1260 target_thread
->return_error
);
1264 next
= t
->from_parent
;
1266 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION
,
1267 "send failed reply for transaction %d, target dead\n",
1270 binder_pop_transaction(target_thread
, t
);
1272 binder_debug(BINDER_DEBUG_DEAD_BINDER
,
1273 "reply failed, no target thread at root\n");
1277 binder_debug(BINDER_DEBUG_DEAD_BINDER
,
1278 "reply failed, no target thread -- retry %d\n",
1284 * binder_validate_object() - checks for a valid metadata object in a buffer.
1285 * @buffer: binder_buffer that we're parsing.
1286 * @offset: offset in the buffer at which to validate an object.
1288 * Return: If there's a valid metadata object at @offset in @buffer, the
1289 * size of that object. Otherwise, it returns zero.
1291 static size_t binder_validate_object(struct binder_buffer
*buffer
, u64 offset
)
1293 /* Check if we can read a header first */
1294 struct binder_object_header
*hdr
;
1295 size_t object_size
= 0;
1297 if (offset
> buffer
->data_size
- sizeof(*hdr
) ||
1298 buffer
->data_size
< sizeof(*hdr
) ||
1299 !IS_ALIGNED(offset
, sizeof(u32
)))
1302 /* Ok, now see if we can read a complete object. */
1303 hdr
= (struct binder_object_header
*)(buffer
->data
+ offset
);
1304 switch (hdr
->type
) {
1305 case BINDER_TYPE_BINDER
:
1306 case BINDER_TYPE_WEAK_BINDER
:
1307 case BINDER_TYPE_HANDLE
:
1308 case BINDER_TYPE_WEAK_HANDLE
:
1309 object_size
= sizeof(struct flat_binder_object
);
1311 case BINDER_TYPE_FD
:
1312 object_size
= sizeof(struct binder_fd_object
);
1314 case BINDER_TYPE_PTR
:
1315 object_size
= sizeof(struct binder_buffer_object
);
1317 case BINDER_TYPE_FDA
:
1318 object_size
= sizeof(struct binder_fd_array_object
);
1323 if (offset
<= buffer
->data_size
- object_size
&&
1324 buffer
->data_size
>= object_size
)
1331 * binder_validate_ptr() - validates binder_buffer_object in a binder_buffer.
1332 * @b: binder_buffer containing the object
1333 * @index: index in offset array at which the binder_buffer_object is
1335 * @start: points to the start of the offset array
1336 * @num_valid: the number of valid offsets in the offset array
1338 * Return: If @index is within the valid range of the offset array
1339 * described by @start and @num_valid, and if there's a valid
1340 * binder_buffer_object at the offset found in index @index
1341 * of the offset array, that object is returned. Otherwise,
1342 * %NULL is returned.
1343 * Note that the offset found in index @index itself is not
1344 * verified; this function assumes that @num_valid elements
1345 * from @start were previously verified to have valid offsets.
1347 static struct binder_buffer_object
*binder_validate_ptr(struct binder_buffer
*b
,
1348 binder_size_t index
,
1349 binder_size_t
*start
,
1350 binder_size_t num_valid
)
1352 struct binder_buffer_object
*buffer_obj
;
1353 binder_size_t
*offp
;
1355 if (index
>= num_valid
)
1358 offp
= start
+ index
;
1359 buffer_obj
= (struct binder_buffer_object
*)(b
->data
+ *offp
);
1360 if (buffer_obj
->hdr
.type
!= BINDER_TYPE_PTR
)
1367 * binder_validate_fixup() - validates pointer/fd fixups happen in order.
1368 * @b: transaction buffer
1369 * @objects_start start of objects buffer
1370 * @buffer: binder_buffer_object in which to fix up
1371 * @offset: start offset in @buffer to fix up
1372 * @last_obj: last binder_buffer_object that we fixed up in
1373 * @last_min_offset: minimum fixup offset in @last_obj
1375 * Return: %true if a fixup in buffer @buffer at offset @offset is
1378 * For safety reasons, we only allow fixups inside a buffer to happen
1379 * at increasing offsets; additionally, we only allow fixup on the last
1380 * buffer object that was verified, or one of its parents.
1382 * Example of what is allowed:
1385 * B (parent = A, offset = 0)
1386 * C (parent = A, offset = 16)
1387 * D (parent = C, offset = 0)
1388 * E (parent = A, offset = 32) // min_offset is 16 (C.parent_offset)
1390 * Examples of what is not allowed:
1392 * Decreasing offsets within the same parent:
1394 * C (parent = A, offset = 16)
1395 * B (parent = A, offset = 0) // decreasing offset within A
1397 * Referring to a parent that wasn't the last object or any of its parents:
1399 * B (parent = A, offset = 0)
1400 * C (parent = A, offset = 0)
1401 * C (parent = A, offset = 16)
1402 * D (parent = B, offset = 0) // B is not A or any of A's parents
1404 static bool binder_validate_fixup(struct binder_buffer
*b
,
1405 binder_size_t
*objects_start
,
1406 struct binder_buffer_object
*buffer
,
1407 binder_size_t fixup_offset
,
1408 struct binder_buffer_object
*last_obj
,
1409 binder_size_t last_min_offset
)
1412 /* Nothing to fix up in */
1416 while (last_obj
!= buffer
) {
1418 * Safe to retrieve the parent of last_obj, since it
1419 * was already previously verified by the driver.
1421 if ((last_obj
->flags
& BINDER_BUFFER_FLAG_HAS_PARENT
) == 0)
1423 last_min_offset
= last_obj
->parent_offset
+ sizeof(uintptr_t);
1424 last_obj
= (struct binder_buffer_object
*)
1425 (b
->data
+ *(objects_start
+ last_obj
->parent
));
1427 return (fixup_offset
>= last_min_offset
);
1430 static void binder_transaction_buffer_release(struct binder_proc
*proc
,
1431 struct binder_buffer
*buffer
,
1432 binder_size_t
*failed_at
)
1434 binder_size_t
*offp
, *off_start
, *off_end
;
1435 int debug_id
= buffer
->debug_id
;
1437 binder_debug(BINDER_DEBUG_TRANSACTION
,
1438 "%d buffer release %d, size %zd-%zd, failed at %p\n",
1439 proc
->pid
, buffer
->debug_id
,
1440 buffer
->data_size
, buffer
->offsets_size
, failed_at
);
1442 if (buffer
->target_node
)
1443 binder_dec_node(buffer
->target_node
, 1, 0);
1445 off_start
= (binder_size_t
*)(buffer
->data
+
1446 ALIGN(buffer
->data_size
, sizeof(void *)));
1448 off_end
= failed_at
;
1450 off_end
= (void *)off_start
+ buffer
->offsets_size
;
1451 for (offp
= off_start
; offp
< off_end
; offp
++) {
1452 struct binder_object_header
*hdr
;
1453 size_t object_size
= binder_validate_object(buffer
, *offp
);
1455 if (object_size
== 0) {
1456 pr_err("transaction release %d bad object at offset %lld, size %zd\n",
1457 debug_id
, (u64
)*offp
, buffer
->data_size
);
1460 hdr
= (struct binder_object_header
*)(buffer
->data
+ *offp
);
1461 switch (hdr
->type
) {
1462 case BINDER_TYPE_BINDER
:
1463 case BINDER_TYPE_WEAK_BINDER
: {
1464 struct flat_binder_object
*fp
;
1465 struct binder_node
*node
;
1467 fp
= to_flat_binder_object(hdr
);
1468 node
= binder_get_node(proc
, fp
->binder
);
1470 pr_err("transaction release %d bad node %016llx\n",
1471 debug_id
, (u64
)fp
->binder
);
1474 binder_debug(BINDER_DEBUG_TRANSACTION
,
1475 " node %d u%016llx\n",
1476 node
->debug_id
, (u64
)node
->ptr
);
1477 binder_dec_node(node
, hdr
->type
== BINDER_TYPE_BINDER
,
1480 case BINDER_TYPE_HANDLE
:
1481 case BINDER_TYPE_WEAK_HANDLE
: {
1482 struct flat_binder_object
*fp
;
1483 struct binder_ref
*ref
;
1485 fp
= to_flat_binder_object(hdr
);
1486 ref
= binder_get_ref(proc
, fp
->handle
,
1487 hdr
->type
== BINDER_TYPE_HANDLE
);
1489 pr_err("transaction release %d bad handle %d\n",
1490 debug_id
, fp
->handle
);
1493 binder_debug(BINDER_DEBUG_TRANSACTION
,
1494 " ref %d desc %d (node %d)\n",
1495 ref
->debug_id
, ref
->desc
, ref
->node
->debug_id
);
1496 binder_dec_ref(ref
, hdr
->type
== BINDER_TYPE_HANDLE
);
1499 case BINDER_TYPE_FD
: {
1500 struct binder_fd_object
*fp
= to_binder_fd_object(hdr
);
1502 binder_debug(BINDER_DEBUG_TRANSACTION
,
1503 " fd %d\n", fp
->fd
);
1505 task_close_fd(proc
, fp
->fd
);
1507 case BINDER_TYPE_PTR
:
1509 * Nothing to do here, this will get cleaned up when the
1510 * transaction buffer gets freed
1513 case BINDER_TYPE_FDA
: {
1514 struct binder_fd_array_object
*fda
;
1515 struct binder_buffer_object
*parent
;
1516 uintptr_t parent_buffer
;
1519 binder_size_t fd_buf_size
;
1521 fda
= to_binder_fd_array_object(hdr
);
1522 parent
= binder_validate_ptr(buffer
, fda
->parent
,
1526 pr_err("transaction release %d bad parent offset",
1531 * Since the parent was already fixed up, convert it
1532 * back to kernel address space to access it
1534 parent_buffer
= parent
->buffer
-
1535 proc
->user_buffer_offset
;
1537 fd_buf_size
= sizeof(u32
) * fda
->num_fds
;
1538 if (fda
->num_fds
>= SIZE_MAX
/ sizeof(u32
)) {
1539 pr_err("transaction release %d invalid number of fds (%lld)\n",
1540 debug_id
, (u64
)fda
->num_fds
);
1543 if (fd_buf_size
> parent
->length
||
1544 fda
->parent_offset
> parent
->length
- fd_buf_size
) {
1545 /* No space for all file descriptors here. */
1546 pr_err("transaction release %d not enough space for %lld fds in buffer\n",
1547 debug_id
, (u64
)fda
->num_fds
);
1550 fd_array
= (u32
*)(parent_buffer
+ fda
->parent_offset
);
1551 for (fd_index
= 0; fd_index
< fda
->num_fds
; fd_index
++)
1552 task_close_fd(proc
, fd_array
[fd_index
]);
1555 pr_err("transaction release %d bad object type %x\n",
1556 debug_id
, hdr
->type
);
1562 static int binder_translate_binder(struct flat_binder_object
*fp
,
1563 struct binder_transaction
*t
,
1564 struct binder_thread
*thread
)
1566 struct binder_node
*node
;
1567 struct binder_ref
*ref
;
1568 struct binder_proc
*proc
= thread
->proc
;
1569 struct binder_proc
*target_proc
= t
->to_proc
;
1571 node
= binder_get_node(proc
, fp
->binder
);
1573 node
= binder_new_node(proc
, fp
->binder
, fp
->cookie
);
1577 node
->min_priority
= fp
->flags
& FLAT_BINDER_FLAG_PRIORITY_MASK
;
1578 node
->accept_fds
= !!(fp
->flags
& FLAT_BINDER_FLAG_ACCEPTS_FDS
);
1580 if (fp
->cookie
!= node
->cookie
) {
1581 binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
1582 proc
->pid
, thread
->pid
, (u64
)fp
->binder
,
1583 node
->debug_id
, (u64
)fp
->cookie
,
1587 if (security_binder_transfer_binder(proc
->tsk
, target_proc
->tsk
))
1590 ref
= binder_get_ref_for_node(target_proc
, node
);
1594 if (fp
->hdr
.type
== BINDER_TYPE_BINDER
)
1595 fp
->hdr
.type
= BINDER_TYPE_HANDLE
;
1597 fp
->hdr
.type
= BINDER_TYPE_WEAK_HANDLE
;
1599 fp
->handle
= ref
->desc
;
1601 binder_inc_ref(ref
, fp
->hdr
.type
== BINDER_TYPE_HANDLE
, &thread
->todo
);
1603 trace_binder_transaction_node_to_ref(t
, node
, ref
);
1604 binder_debug(BINDER_DEBUG_TRANSACTION
,
1605 " node %d u%016llx -> ref %d desc %d\n",
1606 node
->debug_id
, (u64
)node
->ptr
,
1607 ref
->debug_id
, ref
->desc
);
1612 static int binder_translate_handle(struct flat_binder_object
*fp
,
1613 struct binder_transaction
*t
,
1614 struct binder_thread
*thread
)
1616 struct binder_ref
*ref
;
1617 struct binder_proc
*proc
= thread
->proc
;
1618 struct binder_proc
*target_proc
= t
->to_proc
;
1620 ref
= binder_get_ref(proc
, fp
->handle
,
1621 fp
->hdr
.type
== BINDER_TYPE_HANDLE
);
1623 binder_user_error("%d:%d got transaction with invalid handle, %d\n",
1624 proc
->pid
, thread
->pid
, fp
->handle
);
1627 if (security_binder_transfer_binder(proc
->tsk
, target_proc
->tsk
))
1630 if (ref
->node
->proc
== target_proc
) {
1631 if (fp
->hdr
.type
== BINDER_TYPE_HANDLE
)
1632 fp
->hdr
.type
= BINDER_TYPE_BINDER
;
1634 fp
->hdr
.type
= BINDER_TYPE_WEAK_BINDER
;
1635 fp
->binder
= ref
->node
->ptr
;
1636 fp
->cookie
= ref
->node
->cookie
;
1637 binder_inc_node(ref
->node
, fp
->hdr
.type
== BINDER_TYPE_BINDER
,
1639 trace_binder_transaction_ref_to_node(t
, ref
);
1640 binder_debug(BINDER_DEBUG_TRANSACTION
,
1641 " ref %d desc %d -> node %d u%016llx\n",
1642 ref
->debug_id
, ref
->desc
, ref
->node
->debug_id
,
1643 (u64
)ref
->node
->ptr
);
1645 struct binder_ref
*new_ref
;
1647 new_ref
= binder_get_ref_for_node(target_proc
, ref
->node
);
1652 fp
->handle
= new_ref
->desc
;
1654 binder_inc_ref(new_ref
, fp
->hdr
.type
== BINDER_TYPE_HANDLE
,
1656 trace_binder_transaction_ref_to_ref(t
, ref
, new_ref
);
1657 binder_debug(BINDER_DEBUG_TRANSACTION
,
1658 " ref %d desc %d -> ref %d desc %d (node %d)\n",
1659 ref
->debug_id
, ref
->desc
, new_ref
->debug_id
,
1660 new_ref
->desc
, ref
->node
->debug_id
);
1665 static int binder_translate_fd(int fd
,
1666 struct binder_transaction
*t
,
1667 struct binder_thread
*thread
,
1668 struct binder_transaction
*in_reply_to
)
1670 struct binder_proc
*proc
= thread
->proc
;
1671 struct binder_proc
*target_proc
= t
->to_proc
;
1675 bool target_allows_fd
;
1678 target_allows_fd
= !!(in_reply_to
->flags
& TF_ACCEPT_FDS
);
1680 target_allows_fd
= t
->buffer
->target_node
->accept_fds
;
1681 if (!target_allows_fd
) {
1682 binder_user_error("%d:%d got %s with fd, %d, but target does not allow fds\n",
1683 proc
->pid
, thread
->pid
,
1684 in_reply_to
? "reply" : "transaction",
1687 goto err_fd_not_accepted
;
1692 binder_user_error("%d:%d got transaction with invalid fd, %d\n",
1693 proc
->pid
, thread
->pid
, fd
);
1697 ret
= security_binder_transfer_file(proc
->tsk
, target_proc
->tsk
, file
);
1703 target_fd
= task_get_unused_fd_flags(target_proc
, O_CLOEXEC
);
1704 if (target_fd
< 0) {
1706 goto err_get_unused_fd
;
1708 task_fd_install(target_proc
, target_fd
, file
);
1709 trace_binder_transaction_fd(t
, fd
, target_fd
);
1710 binder_debug(BINDER_DEBUG_TRANSACTION
, " fd %d -> %d\n",
1719 err_fd_not_accepted
:
1723 static int binder_translate_fd_array(struct binder_fd_array_object
*fda
,
1724 struct binder_buffer_object
*parent
,
1725 struct binder_transaction
*t
,
1726 struct binder_thread
*thread
,
1727 struct binder_transaction
*in_reply_to
)
1729 binder_size_t fdi
, fd_buf_size
, num_installed_fds
;
1731 uintptr_t parent_buffer
;
1733 struct binder_proc
*proc
= thread
->proc
;
1734 struct binder_proc
*target_proc
= t
->to_proc
;
1736 fd_buf_size
= sizeof(u32
) * fda
->num_fds
;
1737 if (fda
->num_fds
>= SIZE_MAX
/ sizeof(u32
)) {
1738 binder_user_error("%d:%d got transaction with invalid number of fds (%lld)\n",
1739 proc
->pid
, thread
->pid
, (u64
)fda
->num_fds
);
1742 if (fd_buf_size
> parent
->length
||
1743 fda
->parent_offset
> parent
->length
- fd_buf_size
) {
1744 /* No space for all file descriptors here. */
1745 binder_user_error("%d:%d not enough space to store %lld fds in buffer\n",
1746 proc
->pid
, thread
->pid
, (u64
)fda
->num_fds
);
1750 * Since the parent was already fixed up, convert it
1751 * back to the kernel address space to access it
1753 parent_buffer
= parent
->buffer
- target_proc
->user_buffer_offset
;
1754 fd_array
= (u32
*)(parent_buffer
+ fda
->parent_offset
);
1755 if (!IS_ALIGNED((unsigned long)fd_array
, sizeof(u32
))) {
1756 binder_user_error("%d:%d parent offset not aligned correctly.\n",
1757 proc
->pid
, thread
->pid
);
1760 for (fdi
= 0; fdi
< fda
->num_fds
; fdi
++) {
1761 target_fd
= binder_translate_fd(fd_array
[fdi
], t
, thread
,
1764 goto err_translate_fd_failed
;
1765 fd_array
[fdi
] = target_fd
;
1769 err_translate_fd_failed
:
1771 * Failed to allocate fd or security error, free fds
1774 num_installed_fds
= fdi
;
1775 for (fdi
= 0; fdi
< num_installed_fds
; fdi
++)
1776 task_close_fd(target_proc
, fd_array
[fdi
]);
1780 static int binder_fixup_parent(struct binder_transaction
*t
,
1781 struct binder_thread
*thread
,
1782 struct binder_buffer_object
*bp
,
1783 binder_size_t
*off_start
,
1784 binder_size_t num_valid
,
1785 struct binder_buffer_object
*last_fixup_obj
,
1786 binder_size_t last_fixup_min_off
)
1788 struct binder_buffer_object
*parent
;
1790 struct binder_buffer
*b
= t
->buffer
;
1791 struct binder_proc
*proc
= thread
->proc
;
1792 struct binder_proc
*target_proc
= t
->to_proc
;
1794 if (!(bp
->flags
& BINDER_BUFFER_FLAG_HAS_PARENT
))
1797 parent
= binder_validate_ptr(b
, bp
->parent
, off_start
, num_valid
);
1799 binder_user_error("%d:%d got transaction with invalid parent offset or type\n",
1800 proc
->pid
, thread
->pid
);
1804 if (!binder_validate_fixup(b
, off_start
,
1805 parent
, bp
->parent_offset
,
1807 last_fixup_min_off
)) {
1808 binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n",
1809 proc
->pid
, thread
->pid
);
1813 if (parent
->length
< sizeof(binder_uintptr_t
) ||
1814 bp
->parent_offset
> parent
->length
- sizeof(binder_uintptr_t
)) {
1815 /* No space for a pointer here! */
1816 binder_user_error("%d:%d got transaction with invalid parent offset\n",
1817 proc
->pid
, thread
->pid
);
1820 parent_buffer
= (u8
*)(parent
->buffer
-
1821 target_proc
->user_buffer_offset
);
1822 *(binder_uintptr_t
*)(parent_buffer
+ bp
->parent_offset
) = bp
->buffer
;
1827 static void binder_transaction(struct binder_proc
*proc
,
1828 struct binder_thread
*thread
,
1829 struct binder_transaction_data
*tr
, int reply
,
1830 binder_size_t extra_buffers_size
)
1833 struct binder_transaction
*t
;
1834 struct binder_work
*tcomplete
;
1835 binder_size_t
*offp
, *off_end
, *off_start
;
1836 binder_size_t off_min
;
1837 u8
*sg_bufp
, *sg_buf_end
;
1838 struct binder_proc
*target_proc
;
1839 struct binder_thread
*target_thread
= NULL
;
1840 struct binder_node
*target_node
= NULL
;
1841 struct list_head
*target_list
;
1842 wait_queue_head_t
*target_wait
;
1843 struct binder_transaction
*in_reply_to
= NULL
;
1844 struct binder_transaction_log_entry
*e
;
1845 uint32_t return_error
;
1846 struct binder_buffer_object
*last_fixup_obj
= NULL
;
1847 binder_size_t last_fixup_min_off
= 0;
1848 struct binder_context
*context
= proc
->context
;
1850 e
= binder_transaction_log_add(&binder_transaction_log
);
1851 e
->call_type
= reply
? 2 : !!(tr
->flags
& TF_ONE_WAY
);
1852 e
->from_proc
= proc
->pid
;
1853 e
->from_thread
= thread
->pid
;
1854 e
->target_handle
= tr
->target
.handle
;
1855 e
->data_size
= tr
->data_size
;
1856 e
->offsets_size
= tr
->offsets_size
;
1857 e
->context_name
= proc
->context
->name
;
1860 in_reply_to
= thread
->transaction_stack
;
1861 if (in_reply_to
== NULL
) {
1862 binder_user_error("%d:%d got reply transaction with no transaction stack\n",
1863 proc
->pid
, thread
->pid
);
1864 return_error
= BR_FAILED_REPLY
;
1865 goto err_empty_call_stack
;
1867 binder_set_nice(in_reply_to
->saved_priority
);
1868 if (in_reply_to
->to_thread
!= thread
) {
1869 binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n",
1870 proc
->pid
, thread
->pid
, in_reply_to
->debug_id
,
1871 in_reply_to
->to_proc
?
1872 in_reply_to
->to_proc
->pid
: 0,
1873 in_reply_to
->to_thread
?
1874 in_reply_to
->to_thread
->pid
: 0);
1875 return_error
= BR_FAILED_REPLY
;
1877 goto err_bad_call_stack
;
1879 thread
->transaction_stack
= in_reply_to
->to_parent
;
1880 target_thread
= in_reply_to
->from
;
1881 if (target_thread
== NULL
) {
1882 return_error
= BR_DEAD_REPLY
;
1883 goto err_dead_binder
;
1885 if (target_thread
->transaction_stack
!= in_reply_to
) {
1886 binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n",
1887 proc
->pid
, thread
->pid
,
1888 target_thread
->transaction_stack
?
1889 target_thread
->transaction_stack
->debug_id
: 0,
1890 in_reply_to
->debug_id
);
1891 return_error
= BR_FAILED_REPLY
;
1893 target_thread
= NULL
;
1894 goto err_dead_binder
;
1896 target_proc
= target_thread
->proc
;
1898 if (tr
->target
.handle
) {
1899 struct binder_ref
*ref
;
1901 ref
= binder_get_ref(proc
, tr
->target
.handle
, true);
1903 binder_user_error("%d:%d got transaction to invalid handle\n",
1904 proc
->pid
, thread
->pid
);
1905 return_error
= BR_FAILED_REPLY
;
1906 goto err_invalid_target_handle
;
1908 target_node
= ref
->node
;
1910 target_node
= context
->binder_context_mgr_node
;
1911 if (target_node
== NULL
) {
1912 return_error
= BR_DEAD_REPLY
;
1913 goto err_no_context_mgr_node
;
1916 e
->to_node
= target_node
->debug_id
;
1917 target_proc
= target_node
->proc
;
1918 if (target_proc
== NULL
) {
1919 return_error
= BR_DEAD_REPLY
;
1920 goto err_dead_binder
;
1922 if (security_binder_transaction(proc
->tsk
,
1923 target_proc
->tsk
) < 0) {
1924 return_error
= BR_FAILED_REPLY
;
1925 goto err_invalid_target_handle
;
1927 if (!(tr
->flags
& TF_ONE_WAY
) && thread
->transaction_stack
) {
1928 struct binder_transaction
*tmp
;
1930 tmp
= thread
->transaction_stack
;
1931 if (tmp
->to_thread
!= thread
) {
1932 binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n",
1933 proc
->pid
, thread
->pid
, tmp
->debug_id
,
1934 tmp
->to_proc
? tmp
->to_proc
->pid
: 0,
1936 tmp
->to_thread
->pid
: 0);
1937 return_error
= BR_FAILED_REPLY
;
1938 goto err_bad_call_stack
;
1941 if (tmp
->from
&& tmp
->from
->proc
== target_proc
)
1942 target_thread
= tmp
->from
;
1943 tmp
= tmp
->from_parent
;
1947 if (target_thread
) {
1948 e
->to_thread
= target_thread
->pid
;
1949 target_list
= &target_thread
->todo
;
1950 target_wait
= &target_thread
->wait
;
1952 target_list
= &target_proc
->todo
;
1953 target_wait
= &target_proc
->wait
;
1955 e
->to_proc
= target_proc
->pid
;
1957 /* TODO: reuse incoming transaction for reply */
1958 t
= kzalloc(sizeof(*t
), GFP_KERNEL
);
1960 return_error
= BR_FAILED_REPLY
;
1961 goto err_alloc_t_failed
;
1963 binder_stats_created(BINDER_STAT_TRANSACTION
);
1965 tcomplete
= kzalloc(sizeof(*tcomplete
), GFP_KERNEL
);
1966 if (tcomplete
== NULL
) {
1967 return_error
= BR_FAILED_REPLY
;
1968 goto err_alloc_tcomplete_failed
;
1970 binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE
);
1972 t
->debug_id
= ++binder_last_id
;
1973 e
->debug_id
= t
->debug_id
;
1976 binder_debug(BINDER_DEBUG_TRANSACTION
,
1977 "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld-%lld\n",
1978 proc
->pid
, thread
->pid
, t
->debug_id
,
1979 target_proc
->pid
, target_thread
->pid
,
1980 (u64
)tr
->data
.ptr
.buffer
,
1981 (u64
)tr
->data
.ptr
.offsets
,
1982 (u64
)tr
->data_size
, (u64
)tr
->offsets_size
,
1983 (u64
)extra_buffers_size
);
1985 binder_debug(BINDER_DEBUG_TRANSACTION
,
1986 "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld-%lld\n",
1987 proc
->pid
, thread
->pid
, t
->debug_id
,
1988 target_proc
->pid
, target_node
->debug_id
,
1989 (u64
)tr
->data
.ptr
.buffer
,
1990 (u64
)tr
->data
.ptr
.offsets
,
1991 (u64
)tr
->data_size
, (u64
)tr
->offsets_size
,
1992 (u64
)extra_buffers_size
);
1994 if (!reply
&& !(tr
->flags
& TF_ONE_WAY
))
1998 t
->sender_euid
= task_euid(proc
->tsk
);
1999 t
->to_proc
= target_proc
;
2000 t
->to_thread
= target_thread
;
2002 t
->flags
= tr
->flags
;
2003 t
->priority
= task_nice(current
);
2005 trace_binder_transaction(reply
, t
, target_node
);
2007 t
->buffer
= binder_alloc_buf(target_proc
, tr
->data_size
,
2008 tr
->offsets_size
, extra_buffers_size
,
2009 !reply
&& (t
->flags
& TF_ONE_WAY
));
2010 if (t
->buffer
== NULL
) {
2011 return_error
= BR_FAILED_REPLY
;
2012 goto err_binder_alloc_buf_failed
;
2014 t
->buffer
->allow_user_free
= 0;
2015 t
->buffer
->debug_id
= t
->debug_id
;
2016 t
->buffer
->transaction
= t
;
2017 t
->buffer
->target_node
= target_node
;
2018 trace_binder_transaction_alloc_buf(t
->buffer
);
2020 binder_inc_node(target_node
, 1, 0, NULL
);
2022 off_start
= (binder_size_t
*)(t
->buffer
->data
+
2023 ALIGN(tr
->data_size
, sizeof(void *)));
2026 if (copy_from_user(t
->buffer
->data
, (const void __user
*)(uintptr_t)
2027 tr
->data
.ptr
.buffer
, tr
->data_size
)) {
2028 binder_user_error("%d:%d got transaction with invalid data ptr\n",
2029 proc
->pid
, thread
->pid
);
2030 return_error
= BR_FAILED_REPLY
;
2031 goto err_copy_data_failed
;
2033 if (copy_from_user(offp
, (const void __user
*)(uintptr_t)
2034 tr
->data
.ptr
.offsets
, tr
->offsets_size
)) {
2035 binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
2036 proc
->pid
, thread
->pid
);
2037 return_error
= BR_FAILED_REPLY
;
2038 goto err_copy_data_failed
;
2040 if (!IS_ALIGNED(tr
->offsets_size
, sizeof(binder_size_t
))) {
2041 binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n",
2042 proc
->pid
, thread
->pid
, (u64
)tr
->offsets_size
);
2043 return_error
= BR_FAILED_REPLY
;
2044 goto err_bad_offset
;
2046 if (!IS_ALIGNED(extra_buffers_size
, sizeof(u64
))) {
2047 binder_user_error("%d:%d got transaction with unaligned buffers size, %lld\n",
2048 proc
->pid
, thread
->pid
,
2049 (u64
)extra_buffers_size
);
2050 return_error
= BR_FAILED_REPLY
;
2051 goto err_bad_offset
;
2053 off_end
= (void *)off_start
+ tr
->offsets_size
;
2054 sg_bufp
= (u8
*)(PTR_ALIGN(off_end
, sizeof(void *)));
2055 sg_buf_end
= sg_bufp
+ extra_buffers_size
;
2057 for (; offp
< off_end
; offp
++) {
2058 struct binder_object_header
*hdr
;
2059 size_t object_size
= binder_validate_object(t
->buffer
, *offp
);
2061 if (object_size
== 0 || *offp
< off_min
) {
2062 binder_user_error("%d:%d got transaction with invalid offset (%lld, min %lld max %lld) or object.\n",
2063 proc
->pid
, thread
->pid
, (u64
)*offp
,
2065 (u64
)t
->buffer
->data_size
);
2066 return_error
= BR_FAILED_REPLY
;
2067 goto err_bad_offset
;
2070 hdr
= (struct binder_object_header
*)(t
->buffer
->data
+ *offp
);
2071 off_min
= *offp
+ object_size
;
2072 switch (hdr
->type
) {
2073 case BINDER_TYPE_BINDER
:
2074 case BINDER_TYPE_WEAK_BINDER
: {
2075 struct flat_binder_object
*fp
;
2077 fp
= to_flat_binder_object(hdr
);
2078 ret
= binder_translate_binder(fp
, t
, thread
);
2080 return_error
= BR_FAILED_REPLY
;
2081 goto err_translate_failed
;
2084 case BINDER_TYPE_HANDLE
:
2085 case BINDER_TYPE_WEAK_HANDLE
: {
2086 struct flat_binder_object
*fp
;
2088 fp
= to_flat_binder_object(hdr
);
2089 ret
= binder_translate_handle(fp
, t
, thread
);
2091 return_error
= BR_FAILED_REPLY
;
2092 goto err_translate_failed
;
2096 case BINDER_TYPE_FD
: {
2097 struct binder_fd_object
*fp
= to_binder_fd_object(hdr
);
2098 int target_fd
= binder_translate_fd(fp
->fd
, t
, thread
,
2101 if (target_fd
< 0) {
2102 return_error
= BR_FAILED_REPLY
;
2103 goto err_translate_failed
;
2108 case BINDER_TYPE_FDA
: {
2109 struct binder_fd_array_object
*fda
=
2110 to_binder_fd_array_object(hdr
);
2111 struct binder_buffer_object
*parent
=
2112 binder_validate_ptr(t
->buffer
, fda
->parent
,
2116 binder_user_error("%d:%d got transaction with invalid parent offset or type\n",
2117 proc
->pid
, thread
->pid
);
2118 return_error
= BR_FAILED_REPLY
;
2119 goto err_bad_parent
;
2121 if (!binder_validate_fixup(t
->buffer
, off_start
,
2122 parent
, fda
->parent_offset
,
2124 last_fixup_min_off
)) {
2125 binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n",
2126 proc
->pid
, thread
->pid
);
2127 return_error
= BR_FAILED_REPLY
;
2128 goto err_bad_parent
;
2130 ret
= binder_translate_fd_array(fda
, parent
, t
, thread
,
2133 return_error
= BR_FAILED_REPLY
;
2134 goto err_translate_failed
;
2136 last_fixup_obj
= parent
;
2137 last_fixup_min_off
=
2138 fda
->parent_offset
+ sizeof(u32
) * fda
->num_fds
;
2140 case BINDER_TYPE_PTR
: {
2141 struct binder_buffer_object
*bp
=
2142 to_binder_buffer_object(hdr
);
2143 size_t buf_left
= sg_buf_end
- sg_bufp
;
2145 if (bp
->length
> buf_left
) {
2146 binder_user_error("%d:%d got transaction with too large buffer\n",
2147 proc
->pid
, thread
->pid
);
2148 return_error
= BR_FAILED_REPLY
;
2149 goto err_bad_offset
;
2151 if (copy_from_user(sg_bufp
,
2152 (const void __user
*)(uintptr_t)
2153 bp
->buffer
, bp
->length
)) {
2154 binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
2155 proc
->pid
, thread
->pid
);
2156 return_error
= BR_FAILED_REPLY
;
2157 goto err_copy_data_failed
;
2159 /* Fixup buffer pointer to target proc address space */
2160 bp
->buffer
= (uintptr_t)sg_bufp
+
2161 target_proc
->user_buffer_offset
;
2162 sg_bufp
+= ALIGN(bp
->length
, sizeof(u64
));
2164 ret
= binder_fixup_parent(t
, thread
, bp
, off_start
,
2167 last_fixup_min_off
);
2169 return_error
= BR_FAILED_REPLY
;
2170 goto err_translate_failed
;
2172 last_fixup_obj
= bp
;
2173 last_fixup_min_off
= 0;
2176 binder_user_error("%d:%d got transaction with invalid object type, %x\n",
2177 proc
->pid
, thread
->pid
, hdr
->type
);
2178 return_error
= BR_FAILED_REPLY
;
2179 goto err_bad_object_type
;
2183 BUG_ON(t
->buffer
->async_transaction
!= 0);
2184 binder_pop_transaction(target_thread
, in_reply_to
);
2185 } else if (!(t
->flags
& TF_ONE_WAY
)) {
2186 BUG_ON(t
->buffer
->async_transaction
!= 0);
2188 t
->from_parent
= thread
->transaction_stack
;
2189 thread
->transaction_stack
= t
;
2191 BUG_ON(target_node
== NULL
);
2192 BUG_ON(t
->buffer
->async_transaction
!= 1);
2193 if (target_node
->has_async_transaction
) {
2194 target_list
= &target_node
->async_todo
;
2197 target_node
->has_async_transaction
= 1;
2199 t
->work
.type
= BINDER_WORK_TRANSACTION
;
2200 list_add_tail(&t
->work
.entry
, target_list
);
2201 tcomplete
->type
= BINDER_WORK_TRANSACTION_COMPLETE
;
2202 list_add_tail(&tcomplete
->entry
, &thread
->todo
);
2204 wake_up_interruptible(target_wait
);
2207 err_translate_failed
:
2208 err_bad_object_type
:
2211 err_copy_data_failed
:
2212 trace_binder_transaction_failed_buffer_release(t
->buffer
);
2213 binder_transaction_buffer_release(target_proc
, t
->buffer
, offp
);
2214 t
->buffer
->transaction
= NULL
;
2215 binder_free_buf(target_proc
, t
->buffer
);
2216 err_binder_alloc_buf_failed
:
2218 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE
);
2219 err_alloc_tcomplete_failed
:
2221 binder_stats_deleted(BINDER_STAT_TRANSACTION
);
2224 err_empty_call_stack
:
2226 err_invalid_target_handle
:
2227 err_no_context_mgr_node
:
2228 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION
,
2229 "%d:%d transaction failed %d, size %lld-%lld\n",
2230 proc
->pid
, thread
->pid
, return_error
,
2231 (u64
)tr
->data_size
, (u64
)tr
->offsets_size
);
2234 struct binder_transaction_log_entry
*fe
;
2236 fe
= binder_transaction_log_add(&binder_transaction_log_failed
);
2240 BUG_ON(thread
->return_error
!= BR_OK
);
2242 thread
->return_error
= BR_TRANSACTION_COMPLETE
;
2243 binder_send_failed_reply(in_reply_to
, return_error
);
2245 thread
->return_error
= return_error
;
2248 static int binder_thread_write(struct binder_proc
*proc
,
2249 struct binder_thread
*thread
,
2250 binder_uintptr_t binder_buffer
, size_t size
,
2251 binder_size_t
*consumed
)
2254 struct binder_context
*context
= proc
->context
;
2255 void __user
*buffer
= (void __user
*)(uintptr_t)binder_buffer
;
2256 void __user
*ptr
= buffer
+ *consumed
;
2257 void __user
*end
= buffer
+ size
;
2259 while (ptr
< end
&& thread
->return_error
== BR_OK
) {
2260 if (get_user(cmd
, (uint32_t __user
*)ptr
))
2262 ptr
+= sizeof(uint32_t);
2263 trace_binder_command(cmd
);
2264 if (_IOC_NR(cmd
) < ARRAY_SIZE(binder_stats
.bc
)) {
2265 binder_stats
.bc
[_IOC_NR(cmd
)]++;
2266 proc
->stats
.bc
[_IOC_NR(cmd
)]++;
2267 thread
->stats
.bc
[_IOC_NR(cmd
)]++;
2275 struct binder_ref
*ref
;
2276 const char *debug_string
;
2278 if (get_user(target
, (uint32_t __user
*)ptr
))
2280 ptr
+= sizeof(uint32_t);
2281 if (target
== 0 && context
->binder_context_mgr_node
&&
2282 (cmd
== BC_INCREFS
|| cmd
== BC_ACQUIRE
)) {
2283 ref
= binder_get_ref_for_node(proc
,
2284 context
->binder_context_mgr_node
);
2285 if (ref
->desc
!= target
) {
2286 binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n",
2287 proc
->pid
, thread
->pid
,
2291 ref
= binder_get_ref(proc
, target
,
2292 cmd
== BC_ACQUIRE
||
2295 binder_user_error("%d:%d refcount change on invalid ref %d\n",
2296 proc
->pid
, thread
->pid
, target
);
2301 debug_string
= "IncRefs";
2302 binder_inc_ref(ref
, 0, NULL
);
2305 debug_string
= "Acquire";
2306 binder_inc_ref(ref
, 1, NULL
);
2309 debug_string
= "Release";
2310 binder_dec_ref(ref
, 1);
2314 debug_string
= "DecRefs";
2315 binder_dec_ref(ref
, 0);
2318 binder_debug(BINDER_DEBUG_USER_REFS
,
2319 "%d:%d %s ref %d desc %d s %d w %d for node %d\n",
2320 proc
->pid
, thread
->pid
, debug_string
, ref
->debug_id
,
2321 ref
->desc
, ref
->strong
, ref
->weak
, ref
->node
->debug_id
);
2324 case BC_INCREFS_DONE
:
2325 case BC_ACQUIRE_DONE
: {
2326 binder_uintptr_t node_ptr
;
2327 binder_uintptr_t cookie
;
2328 struct binder_node
*node
;
2330 if (get_user(node_ptr
, (binder_uintptr_t __user
*)ptr
))
2332 ptr
+= sizeof(binder_uintptr_t
);
2333 if (get_user(cookie
, (binder_uintptr_t __user
*)ptr
))
2335 ptr
+= sizeof(binder_uintptr_t
);
2336 node
= binder_get_node(proc
, node_ptr
);
2338 binder_user_error("%d:%d %s u%016llx no match\n",
2339 proc
->pid
, thread
->pid
,
2340 cmd
== BC_INCREFS_DONE
?
2346 if (cookie
!= node
->cookie
) {
2347 binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n",
2348 proc
->pid
, thread
->pid
,
2349 cmd
== BC_INCREFS_DONE
?
2350 "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
2351 (u64
)node_ptr
, node
->debug_id
,
2352 (u64
)cookie
, (u64
)node
->cookie
);
2355 if (cmd
== BC_ACQUIRE_DONE
) {
2356 if (node
->pending_strong_ref
== 0) {
2357 binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n",
2358 proc
->pid
, thread
->pid
,
2362 node
->pending_strong_ref
= 0;
2364 if (node
->pending_weak_ref
== 0) {
2365 binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n",
2366 proc
->pid
, thread
->pid
,
2370 node
->pending_weak_ref
= 0;
2372 binder_dec_node(node
, cmd
== BC_ACQUIRE_DONE
, 0);
2373 binder_debug(BINDER_DEBUG_USER_REFS
,
2374 "%d:%d %s node %d ls %d lw %d\n",
2375 proc
->pid
, thread
->pid
,
2376 cmd
== BC_INCREFS_DONE
? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
2377 node
->debug_id
, node
->local_strong_refs
, node
->local_weak_refs
);
2380 case BC_ATTEMPT_ACQUIRE
:
2381 pr_err("BC_ATTEMPT_ACQUIRE not supported\n");
2383 case BC_ACQUIRE_RESULT
:
2384 pr_err("BC_ACQUIRE_RESULT not supported\n");
2387 case BC_FREE_BUFFER
: {
2388 binder_uintptr_t data_ptr
;
2389 struct binder_buffer
*buffer
;
2391 if (get_user(data_ptr
, (binder_uintptr_t __user
*)ptr
))
2393 ptr
+= sizeof(binder_uintptr_t
);
2395 buffer
= binder_buffer_lookup(proc
, data_ptr
);
2396 if (buffer
== NULL
) {
2397 binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n",
2398 proc
->pid
, thread
->pid
, (u64
)data_ptr
);
2401 if (!buffer
->allow_user_free
) {
2402 binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n",
2403 proc
->pid
, thread
->pid
, (u64
)data_ptr
);
2406 binder_debug(BINDER_DEBUG_FREE_BUFFER
,
2407 "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n",
2408 proc
->pid
, thread
->pid
, (u64
)data_ptr
,
2410 buffer
->transaction
? "active" : "finished");
2412 if (buffer
->transaction
) {
2413 buffer
->transaction
->buffer
= NULL
;
2414 buffer
->transaction
= NULL
;
2416 if (buffer
->async_transaction
&& buffer
->target_node
) {
2417 BUG_ON(!buffer
->target_node
->has_async_transaction
);
2418 if (list_empty(&buffer
->target_node
->async_todo
))
2419 buffer
->target_node
->has_async_transaction
= 0;
2421 list_move_tail(buffer
->target_node
->async_todo
.next
, &thread
->todo
);
2423 trace_binder_transaction_buffer_release(buffer
);
2424 binder_transaction_buffer_release(proc
, buffer
, NULL
);
2425 binder_free_buf(proc
, buffer
);
2429 case BC_TRANSACTION_SG
:
2431 struct binder_transaction_data_sg tr
;
2433 if (copy_from_user(&tr
, ptr
, sizeof(tr
)))
2436 binder_transaction(proc
, thread
, &tr
.transaction_data
,
2437 cmd
== BC_REPLY_SG
, tr
.buffers_size
);
2440 case BC_TRANSACTION
:
2442 struct binder_transaction_data tr
;
2444 if (copy_from_user(&tr
, ptr
, sizeof(tr
)))
2447 binder_transaction(proc
, thread
, &tr
,
2448 cmd
== BC_REPLY
, 0);
2452 case BC_REGISTER_LOOPER
:
2453 binder_debug(BINDER_DEBUG_THREADS
,
2454 "%d:%d BC_REGISTER_LOOPER\n",
2455 proc
->pid
, thread
->pid
);
2456 if (thread
->looper
& BINDER_LOOPER_STATE_ENTERED
) {
2457 thread
->looper
|= BINDER_LOOPER_STATE_INVALID
;
2458 binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n",
2459 proc
->pid
, thread
->pid
);
2460 } else if (proc
->requested_threads
== 0) {
2461 thread
->looper
|= BINDER_LOOPER_STATE_INVALID
;
2462 binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n",
2463 proc
->pid
, thread
->pid
);
2465 proc
->requested_threads
--;
2466 proc
->requested_threads_started
++;
2468 thread
->looper
|= BINDER_LOOPER_STATE_REGISTERED
;
2470 case BC_ENTER_LOOPER
:
2471 binder_debug(BINDER_DEBUG_THREADS
,
2472 "%d:%d BC_ENTER_LOOPER\n",
2473 proc
->pid
, thread
->pid
);
2474 if (thread
->looper
& BINDER_LOOPER_STATE_REGISTERED
) {
2475 thread
->looper
|= BINDER_LOOPER_STATE_INVALID
;
2476 binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n",
2477 proc
->pid
, thread
->pid
);
2479 thread
->looper
|= BINDER_LOOPER_STATE_ENTERED
;
2481 case BC_EXIT_LOOPER
:
2482 binder_debug(BINDER_DEBUG_THREADS
,
2483 "%d:%d BC_EXIT_LOOPER\n",
2484 proc
->pid
, thread
->pid
);
2485 thread
->looper
|= BINDER_LOOPER_STATE_EXITED
;
2488 case BC_REQUEST_DEATH_NOTIFICATION
:
2489 case BC_CLEAR_DEATH_NOTIFICATION
: {
2491 binder_uintptr_t cookie
;
2492 struct binder_ref
*ref
;
2493 struct binder_ref_death
*death
;
2495 if (get_user(target
, (uint32_t __user
*)ptr
))
2497 ptr
+= sizeof(uint32_t);
2498 if (get_user(cookie
, (binder_uintptr_t __user
*)ptr
))
2500 ptr
+= sizeof(binder_uintptr_t
);
2501 ref
= binder_get_ref(proc
, target
, false);
2503 binder_user_error("%d:%d %s invalid ref %d\n",
2504 proc
->pid
, thread
->pid
,
2505 cmd
== BC_REQUEST_DEATH_NOTIFICATION
?
2506 "BC_REQUEST_DEATH_NOTIFICATION" :
2507 "BC_CLEAR_DEATH_NOTIFICATION",
2512 binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION
,
2513 "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n",
2514 proc
->pid
, thread
->pid
,
2515 cmd
== BC_REQUEST_DEATH_NOTIFICATION
?
2516 "BC_REQUEST_DEATH_NOTIFICATION" :
2517 "BC_CLEAR_DEATH_NOTIFICATION",
2518 (u64
)cookie
, ref
->debug_id
, ref
->desc
,
2519 ref
->strong
, ref
->weak
, ref
->node
->debug_id
);
2521 if (cmd
== BC_REQUEST_DEATH_NOTIFICATION
) {
2523 binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n",
2524 proc
->pid
, thread
->pid
);
2527 death
= kzalloc(sizeof(*death
), GFP_KERNEL
);
2528 if (death
== NULL
) {
2529 thread
->return_error
= BR_ERROR
;
2530 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION
,
2531 "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n",
2532 proc
->pid
, thread
->pid
);
2535 binder_stats_created(BINDER_STAT_DEATH
);
2536 INIT_LIST_HEAD(&death
->work
.entry
);
2537 death
->cookie
= cookie
;
2539 if (ref
->node
->proc
== NULL
) {
2540 ref
->death
->work
.type
= BINDER_WORK_DEAD_BINDER
;
2541 if (thread
->looper
& (BINDER_LOOPER_STATE_REGISTERED
| BINDER_LOOPER_STATE_ENTERED
)) {
2542 list_add_tail(&ref
->death
->work
.entry
, &thread
->todo
);
2544 list_add_tail(&ref
->death
->work
.entry
, &proc
->todo
);
2545 wake_up_interruptible(&proc
->wait
);
2549 if (ref
->death
== NULL
) {
2550 binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n",
2551 proc
->pid
, thread
->pid
);
2555 if (death
->cookie
!= cookie
) {
2556 binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n",
2557 proc
->pid
, thread
->pid
,
2563 if (list_empty(&death
->work
.entry
)) {
2564 death
->work
.type
= BINDER_WORK_CLEAR_DEATH_NOTIFICATION
;
2565 if (thread
->looper
& (BINDER_LOOPER_STATE_REGISTERED
| BINDER_LOOPER_STATE_ENTERED
)) {
2566 list_add_tail(&death
->work
.entry
, &thread
->todo
);
2568 list_add_tail(&death
->work
.entry
, &proc
->todo
);
2569 wake_up_interruptible(&proc
->wait
);
2572 BUG_ON(death
->work
.type
!= BINDER_WORK_DEAD_BINDER
);
2573 death
->work
.type
= BINDER_WORK_DEAD_BINDER_AND_CLEAR
;
2577 case BC_DEAD_BINDER_DONE
: {
2578 struct binder_work
*w
;
2579 binder_uintptr_t cookie
;
2580 struct binder_ref_death
*death
= NULL
;
2582 if (get_user(cookie
, (binder_uintptr_t __user
*)ptr
))
2585 ptr
+= sizeof(cookie
);
2586 list_for_each_entry(w
, &proc
->delivered_death
, entry
) {
2587 struct binder_ref_death
*tmp_death
= container_of(w
, struct binder_ref_death
, work
);
2589 if (tmp_death
->cookie
== cookie
) {
2594 binder_debug(BINDER_DEBUG_DEAD_BINDER
,
2595 "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n",
2596 proc
->pid
, thread
->pid
, (u64
)cookie
,
2598 if (death
== NULL
) {
2599 binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n",
2600 proc
->pid
, thread
->pid
, (u64
)cookie
);
2604 list_del_init(&death
->work
.entry
);
2605 if (death
->work
.type
== BINDER_WORK_DEAD_BINDER_AND_CLEAR
) {
2606 death
->work
.type
= BINDER_WORK_CLEAR_DEATH_NOTIFICATION
;
2607 if (thread
->looper
& (BINDER_LOOPER_STATE_REGISTERED
| BINDER_LOOPER_STATE_ENTERED
)) {
2608 list_add_tail(&death
->work
.entry
, &thread
->todo
);
2610 list_add_tail(&death
->work
.entry
, &proc
->todo
);
2611 wake_up_interruptible(&proc
->wait
);
2617 pr_err("%d:%d unknown command %d\n",
2618 proc
->pid
, thread
->pid
, cmd
);
2621 *consumed
= ptr
- buffer
;
2626 static void binder_stat_br(struct binder_proc
*proc
,
2627 struct binder_thread
*thread
, uint32_t cmd
)
2629 trace_binder_return(cmd
);
2630 if (_IOC_NR(cmd
) < ARRAY_SIZE(binder_stats
.br
)) {
2631 binder_stats
.br
[_IOC_NR(cmd
)]++;
2632 proc
->stats
.br
[_IOC_NR(cmd
)]++;
2633 thread
->stats
.br
[_IOC_NR(cmd
)]++;
2637 static int binder_has_proc_work(struct binder_proc
*proc
,
2638 struct binder_thread
*thread
)
2640 return !list_empty(&proc
->todo
) ||
2641 (thread
->looper
& BINDER_LOOPER_STATE_NEED_RETURN
);
2644 static int binder_has_thread_work(struct binder_thread
*thread
)
2646 return !list_empty(&thread
->todo
) || thread
->return_error
!= BR_OK
||
2647 (thread
->looper
& BINDER_LOOPER_STATE_NEED_RETURN
);
2650 static int binder_thread_read(struct binder_proc
*proc
,
2651 struct binder_thread
*thread
,
2652 binder_uintptr_t binder_buffer
, size_t size
,
2653 binder_size_t
*consumed
, int non_block
)
2655 void __user
*buffer
= (void __user
*)(uintptr_t)binder_buffer
;
2656 void __user
*ptr
= buffer
+ *consumed
;
2657 void __user
*end
= buffer
+ size
;
2660 int wait_for_proc_work
;
2662 if (*consumed
== 0) {
2663 if (put_user(BR_NOOP
, (uint32_t __user
*)ptr
))
2665 ptr
+= sizeof(uint32_t);
2669 wait_for_proc_work
= thread
->transaction_stack
== NULL
&&
2670 list_empty(&thread
->todo
);
2672 if (thread
->return_error
!= BR_OK
&& ptr
< end
) {
2673 if (thread
->return_error2
!= BR_OK
) {
2674 if (put_user(thread
->return_error2
, (uint32_t __user
*)ptr
))
2676 ptr
+= sizeof(uint32_t);
2677 binder_stat_br(proc
, thread
, thread
->return_error2
);
2680 thread
->return_error2
= BR_OK
;
2682 if (put_user(thread
->return_error
, (uint32_t __user
*)ptr
))
2684 ptr
+= sizeof(uint32_t);
2685 binder_stat_br(proc
, thread
, thread
->return_error
);
2686 thread
->return_error
= BR_OK
;
2691 thread
->looper
|= BINDER_LOOPER_STATE_WAITING
;
2692 if (wait_for_proc_work
)
2693 proc
->ready_threads
++;
2695 binder_unlock(__func__
);
2697 trace_binder_wait_for_work(wait_for_proc_work
,
2698 !!thread
->transaction_stack
,
2699 !list_empty(&thread
->todo
));
2700 if (wait_for_proc_work
) {
2701 if (!(thread
->looper
& (BINDER_LOOPER_STATE_REGISTERED
|
2702 BINDER_LOOPER_STATE_ENTERED
))) {
2703 binder_user_error("%d:%d ERROR: Thread waiting for process work before calling BC_REGISTER_LOOPER or BC_ENTER_LOOPER (state %x)\n",
2704 proc
->pid
, thread
->pid
, thread
->looper
);
2705 wait_event_interruptible(binder_user_error_wait
,
2706 binder_stop_on_user_error
< 2);
2708 binder_set_nice(proc
->default_priority
);
2710 if (!binder_has_proc_work(proc
, thread
))
2713 ret
= wait_event_freezable_exclusive(proc
->wait
, binder_has_proc_work(proc
, thread
));
2716 if (!binder_has_thread_work(thread
))
2719 ret
= wait_event_freezable(thread
->wait
, binder_has_thread_work(thread
));
2722 binder_lock(__func__
);
2724 if (wait_for_proc_work
)
2725 proc
->ready_threads
--;
2726 thread
->looper
&= ~BINDER_LOOPER_STATE_WAITING
;
2733 struct binder_transaction_data tr
;
2734 struct binder_work
*w
;
2735 struct binder_transaction
*t
= NULL
;
2737 if (!list_empty(&thread
->todo
)) {
2738 w
= list_first_entry(&thread
->todo
, struct binder_work
,
2740 } else if (!list_empty(&proc
->todo
) && wait_for_proc_work
) {
2741 w
= list_first_entry(&proc
->todo
, struct binder_work
,
2745 if (ptr
- buffer
== 4 &&
2746 !(thread
->looper
& BINDER_LOOPER_STATE_NEED_RETURN
))
2751 if (end
- ptr
< sizeof(tr
) + 4)
2755 case BINDER_WORK_TRANSACTION
: {
2756 t
= container_of(w
, struct binder_transaction
, work
);
2758 case BINDER_WORK_TRANSACTION_COMPLETE
: {
2759 cmd
= BR_TRANSACTION_COMPLETE
;
2760 if (put_user(cmd
, (uint32_t __user
*)ptr
))
2762 ptr
+= sizeof(uint32_t);
2764 binder_stat_br(proc
, thread
, cmd
);
2765 binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE
,
2766 "%d:%d BR_TRANSACTION_COMPLETE\n",
2767 proc
->pid
, thread
->pid
);
2769 list_del(&w
->entry
);
2771 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE
);
2773 case BINDER_WORK_NODE
: {
2774 struct binder_node
*node
= container_of(w
, struct binder_node
, work
);
2775 uint32_t cmd
= BR_NOOP
;
2776 const char *cmd_name
;
2777 int strong
= node
->internal_strong_refs
|| node
->local_strong_refs
;
2778 int weak
= !hlist_empty(&node
->refs
) || node
->local_weak_refs
|| strong
;
2780 if (weak
&& !node
->has_weak_ref
) {
2782 cmd_name
= "BR_INCREFS";
2783 node
->has_weak_ref
= 1;
2784 node
->pending_weak_ref
= 1;
2785 node
->local_weak_refs
++;
2786 } else if (strong
&& !node
->has_strong_ref
) {
2788 cmd_name
= "BR_ACQUIRE";
2789 node
->has_strong_ref
= 1;
2790 node
->pending_strong_ref
= 1;
2791 node
->local_strong_refs
++;
2792 } else if (!strong
&& node
->has_strong_ref
) {
2794 cmd_name
= "BR_RELEASE";
2795 node
->has_strong_ref
= 0;
2796 } else if (!weak
&& node
->has_weak_ref
) {
2798 cmd_name
= "BR_DECREFS";
2799 node
->has_weak_ref
= 0;
2801 if (cmd
!= BR_NOOP
) {
2802 if (put_user(cmd
, (uint32_t __user
*)ptr
))
2804 ptr
+= sizeof(uint32_t);
2805 if (put_user(node
->ptr
,
2806 (binder_uintptr_t __user
*)ptr
))
2808 ptr
+= sizeof(binder_uintptr_t
);
2809 if (put_user(node
->cookie
,
2810 (binder_uintptr_t __user
*)ptr
))
2812 ptr
+= sizeof(binder_uintptr_t
);
2814 binder_stat_br(proc
, thread
, cmd
);
2815 binder_debug(BINDER_DEBUG_USER_REFS
,
2816 "%d:%d %s %d u%016llx c%016llx\n",
2817 proc
->pid
, thread
->pid
, cmd_name
,
2819 (u64
)node
->ptr
, (u64
)node
->cookie
);
2821 list_del_init(&w
->entry
);
2822 if (!weak
&& !strong
) {
2823 binder_debug(BINDER_DEBUG_INTERNAL_REFS
,
2824 "%d:%d node %d u%016llx c%016llx deleted\n",
2825 proc
->pid
, thread
->pid
,
2829 rb_erase(&node
->rb_node
, &proc
->nodes
);
2831 binder_stats_deleted(BINDER_STAT_NODE
);
2833 binder_debug(BINDER_DEBUG_INTERNAL_REFS
,
2834 "%d:%d node %d u%016llx c%016llx state unchanged\n",
2835 proc
->pid
, thread
->pid
,
2842 case BINDER_WORK_DEAD_BINDER
:
2843 case BINDER_WORK_DEAD_BINDER_AND_CLEAR
:
2844 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION
: {
2845 struct binder_ref_death
*death
;
2848 death
= container_of(w
, struct binder_ref_death
, work
);
2849 if (w
->type
== BINDER_WORK_CLEAR_DEATH_NOTIFICATION
)
2850 cmd
= BR_CLEAR_DEATH_NOTIFICATION_DONE
;
2852 cmd
= BR_DEAD_BINDER
;
2853 if (put_user(cmd
, (uint32_t __user
*)ptr
))
2855 ptr
+= sizeof(uint32_t);
2856 if (put_user(death
->cookie
,
2857 (binder_uintptr_t __user
*)ptr
))
2859 ptr
+= sizeof(binder_uintptr_t
);
2860 binder_stat_br(proc
, thread
, cmd
);
2861 binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION
,
2862 "%d:%d %s %016llx\n",
2863 proc
->pid
, thread
->pid
,
2864 cmd
== BR_DEAD_BINDER
?
2866 "BR_CLEAR_DEATH_NOTIFICATION_DONE",
2867 (u64
)death
->cookie
);
2869 if (w
->type
== BINDER_WORK_CLEAR_DEATH_NOTIFICATION
) {
2870 list_del(&w
->entry
);
2872 binder_stats_deleted(BINDER_STAT_DEATH
);
2874 list_move(&w
->entry
, &proc
->delivered_death
);
2875 if (cmd
== BR_DEAD_BINDER
)
2876 goto done
; /* DEAD_BINDER notifications can cause transactions */
2883 BUG_ON(t
->buffer
== NULL
);
2884 if (t
->buffer
->target_node
) {
2885 struct binder_node
*target_node
= t
->buffer
->target_node
;
2887 tr
.target
.ptr
= target_node
->ptr
;
2888 tr
.cookie
= target_node
->cookie
;
2889 t
->saved_priority
= task_nice(current
);
2890 if (t
->priority
< target_node
->min_priority
&&
2891 !(t
->flags
& TF_ONE_WAY
))
2892 binder_set_nice(t
->priority
);
2893 else if (!(t
->flags
& TF_ONE_WAY
) ||
2894 t
->saved_priority
> target_node
->min_priority
)
2895 binder_set_nice(target_node
->min_priority
);
2896 cmd
= BR_TRANSACTION
;
2903 tr
.flags
= t
->flags
;
2904 tr
.sender_euid
= from_kuid(current_user_ns(), t
->sender_euid
);
2907 struct task_struct
*sender
= t
->from
->proc
->tsk
;
2909 tr
.sender_pid
= task_tgid_nr_ns(sender
,
2910 task_active_pid_ns(current
));
2915 tr
.data_size
= t
->buffer
->data_size
;
2916 tr
.offsets_size
= t
->buffer
->offsets_size
;
2917 tr
.data
.ptr
.buffer
= (binder_uintptr_t
)(
2918 (uintptr_t)t
->buffer
->data
+
2919 proc
->user_buffer_offset
);
2920 tr
.data
.ptr
.offsets
= tr
.data
.ptr
.buffer
+
2921 ALIGN(t
->buffer
->data_size
,
2924 if (put_user(cmd
, (uint32_t __user
*)ptr
))
2926 ptr
+= sizeof(uint32_t);
2927 if (copy_to_user(ptr
, &tr
, sizeof(tr
)))
2931 trace_binder_transaction_received(t
);
2932 binder_stat_br(proc
, thread
, cmd
);
2933 binder_debug(BINDER_DEBUG_TRANSACTION
,
2934 "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n",
2935 proc
->pid
, thread
->pid
,
2936 (cmd
== BR_TRANSACTION
) ? "BR_TRANSACTION" :
2938 t
->debug_id
, t
->from
? t
->from
->proc
->pid
: 0,
2939 t
->from
? t
->from
->pid
: 0, cmd
,
2940 t
->buffer
->data_size
, t
->buffer
->offsets_size
,
2941 (u64
)tr
.data
.ptr
.buffer
, (u64
)tr
.data
.ptr
.offsets
);
2943 list_del(&t
->work
.entry
);
2944 t
->buffer
->allow_user_free
= 1;
2945 if (cmd
== BR_TRANSACTION
&& !(t
->flags
& TF_ONE_WAY
)) {
2946 t
->to_parent
= thread
->transaction_stack
;
2947 t
->to_thread
= thread
;
2948 thread
->transaction_stack
= t
;
2950 t
->buffer
->transaction
= NULL
;
2952 binder_stats_deleted(BINDER_STAT_TRANSACTION
);
2959 *consumed
= ptr
- buffer
;
2960 if (proc
->requested_threads
+ proc
->ready_threads
== 0 &&
2961 proc
->requested_threads_started
< proc
->max_threads
&&
2962 (thread
->looper
& (BINDER_LOOPER_STATE_REGISTERED
|
2963 BINDER_LOOPER_STATE_ENTERED
)) /* the user-space code fails to */
2964 /*spawn a new thread if we leave this out */) {
2965 proc
->requested_threads
++;
2966 binder_debug(BINDER_DEBUG_THREADS
,
2967 "%d:%d BR_SPAWN_LOOPER\n",
2968 proc
->pid
, thread
->pid
);
2969 if (put_user(BR_SPAWN_LOOPER
, (uint32_t __user
*)buffer
))
2971 binder_stat_br(proc
, thread
, BR_SPAWN_LOOPER
);
2976 static void binder_release_work(struct list_head
*list
)
2978 struct binder_work
*w
;
2980 while (!list_empty(list
)) {
2981 w
= list_first_entry(list
, struct binder_work
, entry
);
2982 list_del_init(&w
->entry
);
2984 case BINDER_WORK_TRANSACTION
: {
2985 struct binder_transaction
*t
;
2987 t
= container_of(w
, struct binder_transaction
, work
);
2988 if (t
->buffer
->target_node
&&
2989 !(t
->flags
& TF_ONE_WAY
)) {
2990 binder_send_failed_reply(t
, BR_DEAD_REPLY
);
2992 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION
,
2993 "undelivered transaction %d\n",
2995 t
->buffer
->transaction
= NULL
;
2997 binder_stats_deleted(BINDER_STAT_TRANSACTION
);
3000 case BINDER_WORK_TRANSACTION_COMPLETE
: {
3001 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION
,
3002 "undelivered TRANSACTION_COMPLETE\n");
3004 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE
);
3006 case BINDER_WORK_DEAD_BINDER_AND_CLEAR
:
3007 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION
: {
3008 struct binder_ref_death
*death
;
3010 death
= container_of(w
, struct binder_ref_death
, work
);
3011 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION
,
3012 "undelivered death notification, %016llx\n",
3013 (u64
)death
->cookie
);
3015 binder_stats_deleted(BINDER_STAT_DEATH
);
3018 pr_err("unexpected work type, %d, not freed\n",
3026 static struct binder_thread
*binder_get_thread(struct binder_proc
*proc
)
3028 struct binder_thread
*thread
= NULL
;
3029 struct rb_node
*parent
= NULL
;
3030 struct rb_node
**p
= &proc
->threads
.rb_node
;
3034 thread
= rb_entry(parent
, struct binder_thread
, rb_node
);
3036 if (current
->pid
< thread
->pid
)
3038 else if (current
->pid
> thread
->pid
)
3039 p
= &(*p
)->rb_right
;
3044 thread
= kzalloc(sizeof(*thread
), GFP_KERNEL
);
3047 binder_stats_created(BINDER_STAT_THREAD
);
3048 thread
->proc
= proc
;
3049 thread
->pid
= current
->pid
;
3050 init_waitqueue_head(&thread
->wait
);
3051 INIT_LIST_HEAD(&thread
->todo
);
3052 rb_link_node(&thread
->rb_node
, parent
, p
);
3053 rb_insert_color(&thread
->rb_node
, &proc
->threads
);
3054 thread
->looper
|= BINDER_LOOPER_STATE_NEED_RETURN
;
3055 thread
->return_error
= BR_OK
;
3056 thread
->return_error2
= BR_OK
;
3061 static int binder_free_thread(struct binder_proc
*proc
,
3062 struct binder_thread
*thread
)
3064 struct binder_transaction
*t
;
3065 struct binder_transaction
*send_reply
= NULL
;
3066 int active_transactions
= 0;
3068 rb_erase(&thread
->rb_node
, &proc
->threads
);
3069 t
= thread
->transaction_stack
;
3070 if (t
&& t
->to_thread
== thread
)
3073 active_transactions
++;
3074 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION
,
3075 "release %d:%d transaction %d %s, still active\n",
3076 proc
->pid
, thread
->pid
,
3078 (t
->to_thread
== thread
) ? "in" : "out");
3080 if (t
->to_thread
== thread
) {
3082 t
->to_thread
= NULL
;
3084 t
->buffer
->transaction
= NULL
;
3088 } else if (t
->from
== thread
) {
3095 binder_send_failed_reply(send_reply
, BR_DEAD_REPLY
);
3096 binder_release_work(&thread
->todo
);
3098 binder_stats_deleted(BINDER_STAT_THREAD
);
3099 return active_transactions
;
3102 static unsigned int binder_poll(struct file
*filp
,
3103 struct poll_table_struct
*wait
)
3105 struct binder_proc
*proc
= filp
->private_data
;
3106 struct binder_thread
*thread
= NULL
;
3107 int wait_for_proc_work
;
3109 binder_lock(__func__
);
3111 thread
= binder_get_thread(proc
);
3113 wait_for_proc_work
= thread
->transaction_stack
== NULL
&&
3114 list_empty(&thread
->todo
) && thread
->return_error
== BR_OK
;
3116 binder_unlock(__func__
);
3118 if (wait_for_proc_work
) {
3119 if (binder_has_proc_work(proc
, thread
))
3121 poll_wait(filp
, &proc
->wait
, wait
);
3122 if (binder_has_proc_work(proc
, thread
))
3125 if (binder_has_thread_work(thread
))
3127 poll_wait(filp
, &thread
->wait
, wait
);
3128 if (binder_has_thread_work(thread
))
3134 static int binder_ioctl_write_read(struct file
*filp
,
3135 unsigned int cmd
, unsigned long arg
,
3136 struct binder_thread
*thread
)
3139 struct binder_proc
*proc
= filp
->private_data
;
3140 unsigned int size
= _IOC_SIZE(cmd
);
3141 void __user
*ubuf
= (void __user
*)arg
;
3142 struct binder_write_read bwr
;
3144 if (size
!= sizeof(struct binder_write_read
)) {
3148 if (copy_from_user(&bwr
, ubuf
, sizeof(bwr
))) {
3152 binder_debug(BINDER_DEBUG_READ_WRITE
,
3153 "%d:%d write %lld at %016llx, read %lld at %016llx\n",
3154 proc
->pid
, thread
->pid
,
3155 (u64
)bwr
.write_size
, (u64
)bwr
.write_buffer
,
3156 (u64
)bwr
.read_size
, (u64
)bwr
.read_buffer
);
3158 if (bwr
.write_size
> 0) {
3159 ret
= binder_thread_write(proc
, thread
,
3162 &bwr
.write_consumed
);
3163 trace_binder_write_done(ret
);
3165 bwr
.read_consumed
= 0;
3166 if (copy_to_user(ubuf
, &bwr
, sizeof(bwr
)))
3171 if (bwr
.read_size
> 0) {
3172 ret
= binder_thread_read(proc
, thread
, bwr
.read_buffer
,
3175 filp
->f_flags
& O_NONBLOCK
);
3176 trace_binder_read_done(ret
);
3177 if (!list_empty(&proc
->todo
))
3178 wake_up_interruptible(&proc
->wait
);
3180 if (copy_to_user(ubuf
, &bwr
, sizeof(bwr
)))
3185 binder_debug(BINDER_DEBUG_READ_WRITE
,
3186 "%d:%d wrote %lld of %lld, read return %lld of %lld\n",
3187 proc
->pid
, thread
->pid
,
3188 (u64
)bwr
.write_consumed
, (u64
)bwr
.write_size
,
3189 (u64
)bwr
.read_consumed
, (u64
)bwr
.read_size
);
3190 if (copy_to_user(ubuf
, &bwr
, sizeof(bwr
))) {
3198 static int binder_ioctl_set_ctx_mgr(struct file
*filp
)
3201 struct binder_proc
*proc
= filp
->private_data
;
3202 struct binder_context
*context
= proc
->context
;
3204 kuid_t curr_euid
= current_euid();
3206 if (context
->binder_context_mgr_node
) {
3207 pr_err("BINDER_SET_CONTEXT_MGR already set\n");
3211 ret
= security_binder_set_context_mgr(proc
->tsk
);
3214 if (uid_valid(context
->binder_context_mgr_uid
)) {
3215 if (!uid_eq(context
->binder_context_mgr_uid
, curr_euid
)) {
3216 pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
3217 from_kuid(&init_user_ns
, curr_euid
),
3218 from_kuid(&init_user_ns
,
3219 context
->binder_context_mgr_uid
));
3224 context
->binder_context_mgr_uid
= curr_euid
;
3226 context
->binder_context_mgr_node
= binder_new_node(proc
, 0, 0);
3227 if (!context
->binder_context_mgr_node
) {
3231 context
->binder_context_mgr_node
->local_weak_refs
++;
3232 context
->binder_context_mgr_node
->local_strong_refs
++;
3233 context
->binder_context_mgr_node
->has_strong_ref
= 1;
3234 context
->binder_context_mgr_node
->has_weak_ref
= 1;
3239 static long binder_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
3242 struct binder_proc
*proc
= filp
->private_data
;
3243 struct binder_thread
*thread
;
3244 unsigned int size
= _IOC_SIZE(cmd
);
3245 void __user
*ubuf
= (void __user
*)arg
;
3247 /*pr_info("binder_ioctl: %d:%d %x %lx\n",
3248 proc->pid, current->pid, cmd, arg);*/
3250 if (unlikely(current
->mm
!= proc
->vma_vm_mm
)) {
3251 pr_err("current mm mismatch proc mm\n");
3254 trace_binder_ioctl(cmd
, arg
);
3256 ret
= wait_event_interruptible(binder_user_error_wait
, binder_stop_on_user_error
< 2);
3260 binder_lock(__func__
);
3261 thread
= binder_get_thread(proc
);
3262 if (thread
== NULL
) {
3268 case BINDER_WRITE_READ
:
3269 ret
= binder_ioctl_write_read(filp
, cmd
, arg
, thread
);
3273 case BINDER_SET_MAX_THREADS
:
3274 if (copy_from_user(&proc
->max_threads
, ubuf
, sizeof(proc
->max_threads
))) {
3279 case BINDER_SET_CONTEXT_MGR
:
3280 ret
= binder_ioctl_set_ctx_mgr(filp
);
3284 case BINDER_THREAD_EXIT
:
3285 binder_debug(BINDER_DEBUG_THREADS
, "%d:%d exit\n",
3286 proc
->pid
, thread
->pid
);
3287 binder_free_thread(proc
, thread
);
3290 case BINDER_VERSION
: {
3291 struct binder_version __user
*ver
= ubuf
;
3293 if (size
!= sizeof(struct binder_version
)) {
3297 if (put_user(BINDER_CURRENT_PROTOCOL_VERSION
,
3298 &ver
->protocol_version
)) {
3311 thread
->looper
&= ~BINDER_LOOPER_STATE_NEED_RETURN
;
3312 binder_unlock(__func__
);
3313 wait_event_interruptible(binder_user_error_wait
, binder_stop_on_user_error
< 2);
3314 if (ret
&& ret
!= -ERESTARTSYS
)
3315 pr_info("%d:%d ioctl %x %lx returned %d\n", proc
->pid
, current
->pid
, cmd
, arg
, ret
);
3317 trace_binder_ioctl_done(ret
);
3321 static void binder_vma_open(struct vm_area_struct
*vma
)
3323 struct binder_proc
*proc
= vma
->vm_private_data
;
3325 binder_debug(BINDER_DEBUG_OPEN_CLOSE
,
3326 "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
3327 proc
->pid
, vma
->vm_start
, vma
->vm_end
,
3328 (vma
->vm_end
- vma
->vm_start
) / SZ_1K
, vma
->vm_flags
,
3329 (unsigned long)pgprot_val(vma
->vm_page_prot
));
3332 static void binder_vma_close(struct vm_area_struct
*vma
)
3334 struct binder_proc
*proc
= vma
->vm_private_data
;
3336 binder_debug(BINDER_DEBUG_OPEN_CLOSE
,
3337 "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
3338 proc
->pid
, vma
->vm_start
, vma
->vm_end
,
3339 (vma
->vm_end
- vma
->vm_start
) / SZ_1K
, vma
->vm_flags
,
3340 (unsigned long)pgprot_val(vma
->vm_page_prot
));
3342 proc
->vma_vm_mm
= NULL
;
3343 binder_defer_work(proc
, BINDER_DEFERRED_PUT_FILES
);
3346 static int binder_vm_fault(struct vm_fault
*vmf
)
3348 return VM_FAULT_SIGBUS
;
3351 static const struct vm_operations_struct binder_vm_ops
= {
3352 .open
= binder_vma_open
,
3353 .close
= binder_vma_close
,
3354 .fault
= binder_vm_fault
,
3357 static int binder_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
3360 struct vm_struct
*area
;
3361 struct binder_proc
*proc
= filp
->private_data
;
3362 const char *failure_string
;
3363 struct binder_buffer
*buffer
;
3365 if (proc
->tsk
!= current
)
3368 if ((vma
->vm_end
- vma
->vm_start
) > SZ_4M
)
3369 vma
->vm_end
= vma
->vm_start
+ SZ_4M
;
3371 binder_debug(BINDER_DEBUG_OPEN_CLOSE
,
3372 "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n",
3373 proc
->pid
, vma
->vm_start
, vma
->vm_end
,
3374 (vma
->vm_end
- vma
->vm_start
) / SZ_1K
, vma
->vm_flags
,
3375 (unsigned long)pgprot_val(vma
->vm_page_prot
));
3377 if (vma
->vm_flags
& FORBIDDEN_MMAP_FLAGS
) {
3379 failure_string
= "bad vm_flags";
3382 vma
->vm_flags
= (vma
->vm_flags
| VM_DONTCOPY
) & ~VM_MAYWRITE
;
3384 mutex_lock(&binder_mmap_lock
);
3387 failure_string
= "already mapped";
3388 goto err_already_mapped
;
3391 area
= get_vm_area(vma
->vm_end
- vma
->vm_start
, VM_IOREMAP
);
3394 failure_string
= "get_vm_area";
3395 goto err_get_vm_area_failed
;
3397 proc
->buffer
= area
->addr
;
3398 proc
->user_buffer_offset
= vma
->vm_start
- (uintptr_t)proc
->buffer
;
3399 mutex_unlock(&binder_mmap_lock
);
3401 #ifdef CONFIG_CPU_CACHE_VIPT
3402 if (cache_is_vipt_aliasing()) {
3403 while (CACHE_COLOUR((vma
->vm_start
^ (uint32_t)proc
->buffer
))) {
3404 pr_info("binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc
->pid
, vma
->vm_start
, vma
->vm_end
, proc
->buffer
);
3405 vma
->vm_start
+= PAGE_SIZE
;
3409 proc
->pages
= kzalloc(sizeof(proc
->pages
[0]) * ((vma
->vm_end
- vma
->vm_start
) / PAGE_SIZE
), GFP_KERNEL
);
3410 if (proc
->pages
== NULL
) {
3412 failure_string
= "alloc page array";
3413 goto err_alloc_pages_failed
;
3415 proc
->buffer_size
= vma
->vm_end
- vma
->vm_start
;
3417 vma
->vm_ops
= &binder_vm_ops
;
3418 vma
->vm_private_data
= proc
;
3420 if (binder_update_page_range(proc
, 1, proc
->buffer
, proc
->buffer
+ PAGE_SIZE
, vma
)) {
3422 failure_string
= "alloc small buf";
3423 goto err_alloc_small_buf_failed
;
3425 buffer
= proc
->buffer
;
3426 INIT_LIST_HEAD(&proc
->buffers
);
3427 list_add(&buffer
->entry
, &proc
->buffers
);
3429 binder_insert_free_buffer(proc
, buffer
);
3430 proc
->free_async_space
= proc
->buffer_size
/ 2;
3432 proc
->files
= get_files_struct(current
);
3434 proc
->vma_vm_mm
= vma
->vm_mm
;
3436 /*pr_info("binder_mmap: %d %lx-%lx maps %p\n",
3437 proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/
3440 err_alloc_small_buf_failed
:
3443 err_alloc_pages_failed
:
3444 mutex_lock(&binder_mmap_lock
);
3445 vfree(proc
->buffer
);
3446 proc
->buffer
= NULL
;
3447 err_get_vm_area_failed
:
3449 mutex_unlock(&binder_mmap_lock
);
3451 pr_err("binder_mmap: %d %lx-%lx %s failed %d\n",
3452 proc
->pid
, vma
->vm_start
, vma
->vm_end
, failure_string
, ret
);
3456 static int binder_open(struct inode
*nodp
, struct file
*filp
)
3458 struct binder_proc
*proc
;
3459 struct binder_device
*binder_dev
;
3461 binder_debug(BINDER_DEBUG_OPEN_CLOSE
, "binder_open: %d:%d\n",
3462 current
->group_leader
->pid
, current
->pid
);
3464 proc
= kzalloc(sizeof(*proc
), GFP_KERNEL
);
3467 get_task_struct(current
);
3468 proc
->tsk
= current
;
3469 proc
->vma_vm_mm
= current
->mm
;
3470 INIT_LIST_HEAD(&proc
->todo
);
3471 init_waitqueue_head(&proc
->wait
);
3472 proc
->default_priority
= task_nice(current
);
3473 binder_dev
= container_of(filp
->private_data
, struct binder_device
,
3475 proc
->context
= &binder_dev
->context
;
3477 binder_lock(__func__
);
3479 binder_stats_created(BINDER_STAT_PROC
);
3480 hlist_add_head(&proc
->proc_node
, &binder_procs
);
3481 proc
->pid
= current
->group_leader
->pid
;
3482 INIT_LIST_HEAD(&proc
->delivered_death
);
3483 filp
->private_data
= proc
;
3485 binder_unlock(__func__
);
3487 if (binder_debugfs_dir_entry_proc
) {
3490 snprintf(strbuf
, sizeof(strbuf
), "%u", proc
->pid
);
3492 * proc debug entries are shared between contexts, so
3493 * this will fail if the process tries to open the driver
3494 * again with a different context. The priting code will
3495 * anyway print all contexts that a given PID has, so this
3498 proc
->debugfs_entry
= debugfs_create_file(strbuf
, S_IRUGO
,
3499 binder_debugfs_dir_entry_proc
,
3500 (void *)(unsigned long)proc
->pid
,
3507 static int binder_flush(struct file
*filp
, fl_owner_t id
)
3509 struct binder_proc
*proc
= filp
->private_data
;
3511 binder_defer_work(proc
, BINDER_DEFERRED_FLUSH
);
3516 static void binder_deferred_flush(struct binder_proc
*proc
)
3521 for (n
= rb_first(&proc
->threads
); n
!= NULL
; n
= rb_next(n
)) {
3522 struct binder_thread
*thread
= rb_entry(n
, struct binder_thread
, rb_node
);
3524 thread
->looper
|= BINDER_LOOPER_STATE_NEED_RETURN
;
3525 if (thread
->looper
& BINDER_LOOPER_STATE_WAITING
) {
3526 wake_up_interruptible(&thread
->wait
);
3530 wake_up_interruptible_all(&proc
->wait
);
3532 binder_debug(BINDER_DEBUG_OPEN_CLOSE
,
3533 "binder_flush: %d woke %d threads\n", proc
->pid
,
3537 static int binder_release(struct inode
*nodp
, struct file
*filp
)
3539 struct binder_proc
*proc
= filp
->private_data
;
3541 debugfs_remove(proc
->debugfs_entry
);
3542 binder_defer_work(proc
, BINDER_DEFERRED_RELEASE
);
3547 static int binder_node_release(struct binder_node
*node
, int refs
)
3549 struct binder_ref
*ref
;
3552 list_del_init(&node
->work
.entry
);
3553 binder_release_work(&node
->async_todo
);
3555 if (hlist_empty(&node
->refs
)) {
3557 binder_stats_deleted(BINDER_STAT_NODE
);
3563 node
->local_strong_refs
= 0;
3564 node
->local_weak_refs
= 0;
3565 hlist_add_head(&node
->dead_node
, &binder_dead_nodes
);
3567 hlist_for_each_entry(ref
, &node
->refs
, node_entry
) {
3575 if (list_empty(&ref
->death
->work
.entry
)) {
3576 ref
->death
->work
.type
= BINDER_WORK_DEAD_BINDER
;
3577 list_add_tail(&ref
->death
->work
.entry
,
3579 wake_up_interruptible(&ref
->proc
->wait
);
3584 binder_debug(BINDER_DEBUG_DEAD_BINDER
,
3585 "node %d now dead, refs %d, death %d\n",
3586 node
->debug_id
, refs
, death
);
3591 static void binder_deferred_release(struct binder_proc
*proc
)
3593 struct binder_transaction
*t
;
3594 struct binder_context
*context
= proc
->context
;
3596 int threads
, nodes
, incoming_refs
, outgoing_refs
, buffers
,
3597 active_transactions
, page_count
;
3600 BUG_ON(proc
->files
);
3602 hlist_del(&proc
->proc_node
);
3604 if (context
->binder_context_mgr_node
&&
3605 context
->binder_context_mgr_node
->proc
== proc
) {
3606 binder_debug(BINDER_DEBUG_DEAD_BINDER
,
3607 "%s: %d context_mgr_node gone\n",
3608 __func__
, proc
->pid
);
3609 context
->binder_context_mgr_node
= NULL
;
3613 active_transactions
= 0;
3614 while ((n
= rb_first(&proc
->threads
))) {
3615 struct binder_thread
*thread
;
3617 thread
= rb_entry(n
, struct binder_thread
, rb_node
);
3619 active_transactions
+= binder_free_thread(proc
, thread
);
3624 while ((n
= rb_first(&proc
->nodes
))) {
3625 struct binder_node
*node
;
3627 node
= rb_entry(n
, struct binder_node
, rb_node
);
3629 rb_erase(&node
->rb_node
, &proc
->nodes
);
3630 incoming_refs
= binder_node_release(node
, incoming_refs
);
3634 while ((n
= rb_first(&proc
->refs_by_desc
))) {
3635 struct binder_ref
*ref
;
3637 ref
= rb_entry(n
, struct binder_ref
, rb_node_desc
);
3639 binder_delete_ref(ref
);
3642 binder_release_work(&proc
->todo
);
3643 binder_release_work(&proc
->delivered_death
);
3646 while ((n
= rb_first(&proc
->allocated_buffers
))) {
3647 struct binder_buffer
*buffer
;
3649 buffer
= rb_entry(n
, struct binder_buffer
, rb_node
);
3651 t
= buffer
->transaction
;
3654 buffer
->transaction
= NULL
;
3655 pr_err("release proc %d, transaction %d, not freed\n",
3656 proc
->pid
, t
->debug_id
);
3660 binder_free_buf(proc
, buffer
);
3664 binder_stats_deleted(BINDER_STAT_PROC
);
3670 for (i
= 0; i
< proc
->buffer_size
/ PAGE_SIZE
; i
++) {
3673 if (!proc
->pages
[i
])
3676 page_addr
= proc
->buffer
+ i
* PAGE_SIZE
;
3677 binder_debug(BINDER_DEBUG_BUFFER_ALLOC
,
3678 "%s: %d: page %d at %p not freed\n",
3679 __func__
, proc
->pid
, i
, page_addr
);
3680 unmap_kernel_range((unsigned long)page_addr
, PAGE_SIZE
);
3681 __free_page(proc
->pages
[i
]);
3685 vfree(proc
->buffer
);
3688 put_task_struct(proc
->tsk
);
3690 binder_debug(BINDER_DEBUG_OPEN_CLOSE
,
3691 "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n",
3692 __func__
, proc
->pid
, threads
, nodes
, incoming_refs
,
3693 outgoing_refs
, active_transactions
, buffers
, page_count
);
3698 static void binder_deferred_func(struct work_struct
*work
)
3700 struct binder_proc
*proc
;
3701 struct files_struct
*files
;
3706 binder_lock(__func__
);
3707 mutex_lock(&binder_deferred_lock
);
3708 if (!hlist_empty(&binder_deferred_list
)) {
3709 proc
= hlist_entry(binder_deferred_list
.first
,
3710 struct binder_proc
, deferred_work_node
);
3711 hlist_del_init(&proc
->deferred_work_node
);
3712 defer
= proc
->deferred_work
;
3713 proc
->deferred_work
= 0;
3718 mutex_unlock(&binder_deferred_lock
);
3721 if (defer
& BINDER_DEFERRED_PUT_FILES
) {
3722 files
= proc
->files
;
3727 if (defer
& BINDER_DEFERRED_FLUSH
)
3728 binder_deferred_flush(proc
);
3730 if (defer
& BINDER_DEFERRED_RELEASE
)
3731 binder_deferred_release(proc
); /* frees proc */
3733 binder_unlock(__func__
);
3735 put_files_struct(files
);
3738 static DECLARE_WORK(binder_deferred_work
, binder_deferred_func
);
3741 binder_defer_work(struct binder_proc
*proc
, enum binder_deferred_state defer
)
3743 mutex_lock(&binder_deferred_lock
);
3744 proc
->deferred_work
|= defer
;
3745 if (hlist_unhashed(&proc
->deferred_work_node
)) {
3746 hlist_add_head(&proc
->deferred_work_node
,
3747 &binder_deferred_list
);
3748 schedule_work(&binder_deferred_work
);
3750 mutex_unlock(&binder_deferred_lock
);
3753 static void print_binder_transaction(struct seq_file
*m
, const char *prefix
,
3754 struct binder_transaction
*t
)
3757 "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d",
3758 prefix
, t
->debug_id
, t
,
3759 t
->from
? t
->from
->proc
->pid
: 0,
3760 t
->from
? t
->from
->pid
: 0,
3761 t
->to_proc
? t
->to_proc
->pid
: 0,
3762 t
->to_thread
? t
->to_thread
->pid
: 0,
3763 t
->code
, t
->flags
, t
->priority
, t
->need_reply
);
3764 if (t
->buffer
== NULL
) {
3765 seq_puts(m
, " buffer free\n");
3768 if (t
->buffer
->target_node
)
3769 seq_printf(m
, " node %d",
3770 t
->buffer
->target_node
->debug_id
);
3771 seq_printf(m
, " size %zd:%zd data %p\n",
3772 t
->buffer
->data_size
, t
->buffer
->offsets_size
,
3776 static void print_binder_buffer(struct seq_file
*m
, const char *prefix
,
3777 struct binder_buffer
*buffer
)
3779 seq_printf(m
, "%s %d: %p size %zd:%zd %s\n",
3780 prefix
, buffer
->debug_id
, buffer
->data
,
3781 buffer
->data_size
, buffer
->offsets_size
,
3782 buffer
->transaction
? "active" : "delivered");
3785 static void print_binder_work(struct seq_file
*m
, const char *prefix
,
3786 const char *transaction_prefix
,
3787 struct binder_work
*w
)
3789 struct binder_node
*node
;
3790 struct binder_transaction
*t
;
3793 case BINDER_WORK_TRANSACTION
:
3794 t
= container_of(w
, struct binder_transaction
, work
);
3795 print_binder_transaction(m
, transaction_prefix
, t
);
3797 case BINDER_WORK_TRANSACTION_COMPLETE
:
3798 seq_printf(m
, "%stransaction complete\n", prefix
);
3800 case BINDER_WORK_NODE
:
3801 node
= container_of(w
, struct binder_node
, work
);
3802 seq_printf(m
, "%snode work %d: u%016llx c%016llx\n",
3803 prefix
, node
->debug_id
,
3804 (u64
)node
->ptr
, (u64
)node
->cookie
);
3806 case BINDER_WORK_DEAD_BINDER
:
3807 seq_printf(m
, "%shas dead binder\n", prefix
);
3809 case BINDER_WORK_DEAD_BINDER_AND_CLEAR
:
3810 seq_printf(m
, "%shas cleared dead binder\n", prefix
);
3812 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION
:
3813 seq_printf(m
, "%shas cleared death notification\n", prefix
);
3816 seq_printf(m
, "%sunknown work: type %d\n", prefix
, w
->type
);
3821 static void print_binder_thread(struct seq_file
*m
,
3822 struct binder_thread
*thread
,
3825 struct binder_transaction
*t
;
3826 struct binder_work
*w
;
3827 size_t start_pos
= m
->count
;
3830 seq_printf(m
, " thread %d: l %02x\n", thread
->pid
, thread
->looper
);
3831 header_pos
= m
->count
;
3832 t
= thread
->transaction_stack
;
3834 if (t
->from
== thread
) {
3835 print_binder_transaction(m
,
3836 " outgoing transaction", t
);
3838 } else if (t
->to_thread
== thread
) {
3839 print_binder_transaction(m
,
3840 " incoming transaction", t
);
3843 print_binder_transaction(m
, " bad transaction", t
);
3847 list_for_each_entry(w
, &thread
->todo
, entry
) {
3848 print_binder_work(m
, " ", " pending transaction", w
);
3850 if (!print_always
&& m
->count
== header_pos
)
3851 m
->count
= start_pos
;
3854 static void print_binder_node(struct seq_file
*m
, struct binder_node
*node
)
3856 struct binder_ref
*ref
;
3857 struct binder_work
*w
;
3861 hlist_for_each_entry(ref
, &node
->refs
, node_entry
)
3864 seq_printf(m
, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d",
3865 node
->debug_id
, (u64
)node
->ptr
, (u64
)node
->cookie
,
3866 node
->has_strong_ref
, node
->has_weak_ref
,
3867 node
->local_strong_refs
, node
->local_weak_refs
,
3868 node
->internal_strong_refs
, count
);
3870 seq_puts(m
, " proc");
3871 hlist_for_each_entry(ref
, &node
->refs
, node_entry
)
3872 seq_printf(m
, " %d", ref
->proc
->pid
);
3875 list_for_each_entry(w
, &node
->async_todo
, entry
)
3876 print_binder_work(m
, " ",
3877 " pending async transaction", w
);
3880 static void print_binder_ref(struct seq_file
*m
, struct binder_ref
*ref
)
3882 seq_printf(m
, " ref %d: desc %d %snode %d s %d w %d d %p\n",
3883 ref
->debug_id
, ref
->desc
, ref
->node
->proc
? "" : "dead ",
3884 ref
->node
->debug_id
, ref
->strong
, ref
->weak
, ref
->death
);
3887 static void print_binder_proc(struct seq_file
*m
,
3888 struct binder_proc
*proc
, int print_all
)
3890 struct binder_work
*w
;
3892 size_t start_pos
= m
->count
;
3895 seq_printf(m
, "proc %d\n", proc
->pid
);
3896 seq_printf(m
, "context %s\n", proc
->context
->name
);
3897 header_pos
= m
->count
;
3899 for (n
= rb_first(&proc
->threads
); n
!= NULL
; n
= rb_next(n
))
3900 print_binder_thread(m
, rb_entry(n
, struct binder_thread
,
3901 rb_node
), print_all
);
3902 for (n
= rb_first(&proc
->nodes
); n
!= NULL
; n
= rb_next(n
)) {
3903 struct binder_node
*node
= rb_entry(n
, struct binder_node
,
3905 if (print_all
|| node
->has_async_transaction
)
3906 print_binder_node(m
, node
);
3909 for (n
= rb_first(&proc
->refs_by_desc
);
3912 print_binder_ref(m
, rb_entry(n
, struct binder_ref
,
3915 for (n
= rb_first(&proc
->allocated_buffers
); n
!= NULL
; n
= rb_next(n
))
3916 print_binder_buffer(m
, " buffer",
3917 rb_entry(n
, struct binder_buffer
, rb_node
));
3918 list_for_each_entry(w
, &proc
->todo
, entry
)
3919 print_binder_work(m
, " ", " pending transaction", w
);
3920 list_for_each_entry(w
, &proc
->delivered_death
, entry
) {
3921 seq_puts(m
, " has delivered dead binder\n");
3924 if (!print_all
&& m
->count
== header_pos
)
3925 m
->count
= start_pos
;
3928 static const char * const binder_return_strings
[] = {
3933 "BR_ACQUIRE_RESULT",
3935 "BR_TRANSACTION_COMPLETE",
3940 "BR_ATTEMPT_ACQUIRE",
3945 "BR_CLEAR_DEATH_NOTIFICATION_DONE",
3949 static const char * const binder_command_strings
[] = {
3952 "BC_ACQUIRE_RESULT",
3960 "BC_ATTEMPT_ACQUIRE",
3961 "BC_REGISTER_LOOPER",
3964 "BC_REQUEST_DEATH_NOTIFICATION",
3965 "BC_CLEAR_DEATH_NOTIFICATION",
3966 "BC_DEAD_BINDER_DONE",
3967 "BC_TRANSACTION_SG",
3971 static const char * const binder_objstat_strings
[] = {
3978 "transaction_complete"
3981 static void print_binder_stats(struct seq_file
*m
, const char *prefix
,
3982 struct binder_stats
*stats
)
3986 BUILD_BUG_ON(ARRAY_SIZE(stats
->bc
) !=
3987 ARRAY_SIZE(binder_command_strings
));
3988 for (i
= 0; i
< ARRAY_SIZE(stats
->bc
); i
++) {
3990 seq_printf(m
, "%s%s: %d\n", prefix
,
3991 binder_command_strings
[i
], stats
->bc
[i
]);
3994 BUILD_BUG_ON(ARRAY_SIZE(stats
->br
) !=
3995 ARRAY_SIZE(binder_return_strings
));
3996 for (i
= 0; i
< ARRAY_SIZE(stats
->br
); i
++) {
3998 seq_printf(m
, "%s%s: %d\n", prefix
,
3999 binder_return_strings
[i
], stats
->br
[i
]);
4002 BUILD_BUG_ON(ARRAY_SIZE(stats
->obj_created
) !=
4003 ARRAY_SIZE(binder_objstat_strings
));
4004 BUILD_BUG_ON(ARRAY_SIZE(stats
->obj_created
) !=
4005 ARRAY_SIZE(stats
->obj_deleted
));
4006 for (i
= 0; i
< ARRAY_SIZE(stats
->obj_created
); i
++) {
4007 if (stats
->obj_created
[i
] || stats
->obj_deleted
[i
])
4008 seq_printf(m
, "%s%s: active %d total %d\n", prefix
,
4009 binder_objstat_strings
[i
],
4010 stats
->obj_created
[i
] - stats
->obj_deleted
[i
],
4011 stats
->obj_created
[i
]);
4015 static void print_binder_proc_stats(struct seq_file
*m
,
4016 struct binder_proc
*proc
)
4018 struct binder_work
*w
;
4020 int count
, strong
, weak
;
4022 seq_printf(m
, "proc %d\n", proc
->pid
);
4023 seq_printf(m
, "context %s\n", proc
->context
->name
);
4025 for (n
= rb_first(&proc
->threads
); n
!= NULL
; n
= rb_next(n
))
4027 seq_printf(m
, " threads: %d\n", count
);
4028 seq_printf(m
, " requested threads: %d+%d/%d\n"
4029 " ready threads %d\n"
4030 " free async space %zd\n", proc
->requested_threads
,
4031 proc
->requested_threads_started
, proc
->max_threads
,
4032 proc
->ready_threads
, proc
->free_async_space
);
4034 for (n
= rb_first(&proc
->nodes
); n
!= NULL
; n
= rb_next(n
))
4036 seq_printf(m
, " nodes: %d\n", count
);
4040 for (n
= rb_first(&proc
->refs_by_desc
); n
!= NULL
; n
= rb_next(n
)) {
4041 struct binder_ref
*ref
= rb_entry(n
, struct binder_ref
,
4044 strong
+= ref
->strong
;
4047 seq_printf(m
, " refs: %d s %d w %d\n", count
, strong
, weak
);
4050 for (n
= rb_first(&proc
->allocated_buffers
); n
!= NULL
; n
= rb_next(n
))
4052 seq_printf(m
, " buffers: %d\n", count
);
4055 list_for_each_entry(w
, &proc
->todo
, entry
) {
4057 case BINDER_WORK_TRANSACTION
:
4064 seq_printf(m
, " pending transactions: %d\n", count
);
4066 print_binder_stats(m
, " ", &proc
->stats
);
4070 static int binder_state_show(struct seq_file
*m
, void *unused
)
4072 struct binder_proc
*proc
;
4073 struct binder_node
*node
;
4074 int do_lock
= !binder_debug_no_lock
;
4077 binder_lock(__func__
);
4079 seq_puts(m
, "binder state:\n");
4081 if (!hlist_empty(&binder_dead_nodes
))
4082 seq_puts(m
, "dead nodes:\n");
4083 hlist_for_each_entry(node
, &binder_dead_nodes
, dead_node
)
4084 print_binder_node(m
, node
);
4086 hlist_for_each_entry(proc
, &binder_procs
, proc_node
)
4087 print_binder_proc(m
, proc
, 1);
4089 binder_unlock(__func__
);
4093 static int binder_stats_show(struct seq_file
*m
, void *unused
)
4095 struct binder_proc
*proc
;
4096 int do_lock
= !binder_debug_no_lock
;
4099 binder_lock(__func__
);
4101 seq_puts(m
, "binder stats:\n");
4103 print_binder_stats(m
, "", &binder_stats
);
4105 hlist_for_each_entry(proc
, &binder_procs
, proc_node
)
4106 print_binder_proc_stats(m
, proc
);
4108 binder_unlock(__func__
);
4112 static int binder_transactions_show(struct seq_file
*m
, void *unused
)
4114 struct binder_proc
*proc
;
4115 int do_lock
= !binder_debug_no_lock
;
4118 binder_lock(__func__
);
4120 seq_puts(m
, "binder transactions:\n");
4121 hlist_for_each_entry(proc
, &binder_procs
, proc_node
)
4122 print_binder_proc(m
, proc
, 0);
4124 binder_unlock(__func__
);
4128 static int binder_proc_show(struct seq_file
*m
, void *unused
)
4130 struct binder_proc
*itr
;
4131 int pid
= (unsigned long)m
->private;
4132 int do_lock
= !binder_debug_no_lock
;
4135 binder_lock(__func__
);
4137 hlist_for_each_entry(itr
, &binder_procs
, proc_node
) {
4138 if (itr
->pid
== pid
) {
4139 seq_puts(m
, "binder proc state:\n");
4140 print_binder_proc(m
, itr
, 1);
4144 binder_unlock(__func__
);
4148 static void print_binder_transaction_log_entry(struct seq_file
*m
,
4149 struct binder_transaction_log_entry
*e
)
4152 "%d: %s from %d:%d to %d:%d context %s node %d handle %d size %d:%d\n",
4153 e
->debug_id
, (e
->call_type
== 2) ? "reply" :
4154 ((e
->call_type
== 1) ? "async" : "call "), e
->from_proc
,
4155 e
->from_thread
, e
->to_proc
, e
->to_thread
, e
->context_name
,
4156 e
->to_node
, e
->target_handle
, e
->data_size
, e
->offsets_size
);
4159 static int binder_transaction_log_show(struct seq_file
*m
, void *unused
)
4161 struct binder_transaction_log
*log
= m
->private;
4165 for (i
= log
->next
; i
< ARRAY_SIZE(log
->entry
); i
++)
4166 print_binder_transaction_log_entry(m
, &log
->entry
[i
]);
4168 for (i
= 0; i
< log
->next
; i
++)
4169 print_binder_transaction_log_entry(m
, &log
->entry
[i
]);
4173 static const struct file_operations binder_fops
= {
4174 .owner
= THIS_MODULE
,
4175 .poll
= binder_poll
,
4176 .unlocked_ioctl
= binder_ioctl
,
4177 .compat_ioctl
= binder_ioctl
,
4178 .mmap
= binder_mmap
,
4179 .open
= binder_open
,
4180 .flush
= binder_flush
,
4181 .release
= binder_release
,
4184 BINDER_DEBUG_ENTRY(state
);
4185 BINDER_DEBUG_ENTRY(stats
);
4186 BINDER_DEBUG_ENTRY(transactions
);
4187 BINDER_DEBUG_ENTRY(transaction_log
);
4189 static int __init
init_binder_device(const char *name
)
4192 struct binder_device
*binder_device
;
4194 binder_device
= kzalloc(sizeof(*binder_device
), GFP_KERNEL
);
4198 binder_device
->miscdev
.fops
= &binder_fops
;
4199 binder_device
->miscdev
.minor
= MISC_DYNAMIC_MINOR
;
4200 binder_device
->miscdev
.name
= name
;
4202 binder_device
->context
.binder_context_mgr_uid
= INVALID_UID
;
4203 binder_device
->context
.name
= name
;
4205 ret
= misc_register(&binder_device
->miscdev
);
4207 kfree(binder_device
);
4211 hlist_add_head(&binder_device
->hlist
, &binder_devices
);
4216 static int __init
binder_init(void)
4219 char *device_name
, *device_names
;
4220 struct binder_device
*device
;
4221 struct hlist_node
*tmp
;
4223 binder_debugfs_dir_entry_root
= debugfs_create_dir("binder", NULL
);
4224 if (binder_debugfs_dir_entry_root
)
4225 binder_debugfs_dir_entry_proc
= debugfs_create_dir("proc",
4226 binder_debugfs_dir_entry_root
);
4228 if (binder_debugfs_dir_entry_root
) {
4229 debugfs_create_file("state",
4231 binder_debugfs_dir_entry_root
,
4233 &binder_state_fops
);
4234 debugfs_create_file("stats",
4236 binder_debugfs_dir_entry_root
,
4238 &binder_stats_fops
);
4239 debugfs_create_file("transactions",
4241 binder_debugfs_dir_entry_root
,
4243 &binder_transactions_fops
);
4244 debugfs_create_file("transaction_log",
4246 binder_debugfs_dir_entry_root
,
4247 &binder_transaction_log
,
4248 &binder_transaction_log_fops
);
4249 debugfs_create_file("failed_transaction_log",
4251 binder_debugfs_dir_entry_root
,
4252 &binder_transaction_log_failed
,
4253 &binder_transaction_log_fops
);
4257 * Copy the module_parameter string, because we don't want to
4258 * tokenize it in-place.
4260 device_names
= kzalloc(strlen(binder_devices_param
) + 1, GFP_KERNEL
);
4261 if (!device_names
) {
4263 goto err_alloc_device_names_failed
;
4265 strcpy(device_names
, binder_devices_param
);
4267 while ((device_name
= strsep(&device_names
, ","))) {
4268 ret
= init_binder_device(device_name
);
4270 goto err_init_binder_device_failed
;
4275 err_init_binder_device_failed
:
4276 hlist_for_each_entry_safe(device
, tmp
, &binder_devices
, hlist
) {
4277 misc_deregister(&device
->miscdev
);
4278 hlist_del(&device
->hlist
);
4281 err_alloc_device_names_failed
:
4282 debugfs_remove_recursive(binder_debugfs_dir_entry_root
);
4287 device_initcall(binder_init
);
4289 #define CREATE_TRACE_POINTS
4290 #include "binder_trace.h"
4292 MODULE_LICENSE("GPL v2");