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staging: android: Break up a long line in binder_send_failed_reply
[deliverable/linux.git] / drivers / staging / android / binder.c
CommitLineData
355b0502
GKH		 1/* binder.c
2 *
3 * Android IPC Subsystem
4 *
5 * Copyright (C) 2007-2008 Google, Inc.
6 *
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.
10 *
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.
15 *
16 */
17
56b468fc
AS		 18#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
355b0502
GKH		 20#include <asm/cacheflush.h>
21#include <linux/fdtable.h>
22#include <linux/file.h>
e2610b26 23#include <linux/freezer.h>
355b0502
GKH		 24#include <linux/fs.h>
25#include <linux/list.h>
26#include <linux/miscdevice.h>
27#include <linux/mm.h>
28#include <linux/module.h>
29#include <linux/mutex.h>
30#include <linux/nsproxy.h>
31#include <linux/poll.h>
16b66554 32#include <linux/debugfs.h>
355b0502
GKH		 33#include <linux/rbtree.h>
34#include <linux/sched.h>
5249f488 35#include <linux/seq_file.h>
355b0502
GKH		 36#include <linux/uaccess.h>
37#include <linux/vmalloc.h>
c11a166c 38#include <linux/slab.h>
17cf22c3 39#include <linux/pid_namespace.h>
355b0502
GKH		 40
41#include "binder.h"
975a1ac9 42#include "binder_trace.h"
355b0502 43
975a1ac9 44static DEFINE_MUTEX(binder_main_lock);
355b0502 45static DEFINE_MUTEX(binder_deferred_lock);
bd1eff97 46static DEFINE_MUTEX(binder_mmap_lock);
355b0502
GKH		 47
48static HLIST_HEAD(binder_procs);
49static HLIST_HEAD(binder_deferred_list);
50static HLIST_HEAD(binder_dead_nodes);
51
16b66554
AH		 52static struct dentry *binder_debugfs_dir_entry_root;
53static struct dentry *binder_debugfs_dir_entry_proc;
355b0502 54static struct binder_node *binder_context_mgr_node;
4a2ebb93 55static kuid_t binder_context_mgr_uid = INVALID_UID;
355b0502 56static int binder_last_id;
3c762a49 57static struct workqueue_struct *binder_deferred_workqueue;
355b0502 58
5249f488
AH		 59#define BINDER_DEBUG_ENTRY(name) \
60static int binder_##name##_open(struct inode *inode, struct file *file) \
61{ \
16b66554 62 return single_open(file, binder_##name##_show, inode->i_private); \
5249f488
AH		 63} \
64\
65static const struct file_operations binder_##name##_fops = { \
66 .owner = THIS_MODULE, \
67 .open = binder_##name##_open, \
68 .read = seq_read, \
69 .llseek = seq_lseek, \
70 .release = single_release, \
71}
72
73static int binder_proc_show(struct seq_file *m, void *unused);
74BINDER_DEBUG_ENTRY(proc);
355b0502
GKH		 75
76/* This is only defined in include/asm-arm/sizes.h */
77#ifndef SZ_1K
78#define SZ_1K 0x400
79#endif
80
81#ifndef SZ_4M
82#define SZ_4M 0x400000
83#endif
84
85#define FORBIDDEN_MMAP_FLAGS (VM_WRITE)
86
87#define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64)
88
89enum {
90 BINDER_DEBUG_USER_ERROR = 1U << 0,
91 BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1,
92 BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2,
93 BINDER_DEBUG_OPEN_CLOSE = 1U << 3,
94 BINDER_DEBUG_DEAD_BINDER = 1U << 4,
95 BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5,
96 BINDER_DEBUG_READ_WRITE = 1U << 6,
97 BINDER_DEBUG_USER_REFS = 1U << 7,
98 BINDER_DEBUG_THREADS = 1U << 8,
99 BINDER_DEBUG_TRANSACTION = 1U << 9,
100 BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10,
101 BINDER_DEBUG_FREE_BUFFER = 1U << 11,
102 BINDER_DEBUG_INTERNAL_REFS = 1U << 12,
103 BINDER_DEBUG_BUFFER_ALLOC = 1U << 13,
104 BINDER_DEBUG_PRIORITY_CAP = 1U << 14,
105 BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15,
106};
107static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
108 BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
109module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
110
2c52325e 111static bool binder_debug_no_lock;
355b0502
GKH		 112module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
113
114static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
115static int binder_stop_on_user_error;
116
117static int binder_set_stop_on_user_error(const char *val,
118 struct kernel_param *kp)
119{
120 int ret;
10f62861 121
355b0502
GKH		 122 ret = param_set_int(val, kp);
123 if (binder_stop_on_user_error < 2)
124 wake_up(&binder_user_error_wait);
125 return ret;
126}
127module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
128 param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO);
129
130#define binder_debug(mask, x...) \
131 do { \
132 if (binder_debug_mask & mask) \
258767fe 133 pr_info(x); \
355b0502
GKH		 134 } while (0)
135
136#define binder_user_error(x...) \
137 do { \
138 if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
258767fe 139 pr_info(x); \
355b0502
GKH		 140 if (binder_stop_on_user_error) \
141 binder_stop_on_user_error = 2; \
142 } while (0)
143
144enum binder_stat_types {
145 BINDER_STAT_PROC,
146 BINDER_STAT_THREAD,
147 BINDER_STAT_NODE,
148 BINDER_STAT_REF,
149 BINDER_STAT_DEATH,
150 BINDER_STAT_TRANSACTION,
151 BINDER_STAT_TRANSACTION_COMPLETE,
152 BINDER_STAT_COUNT
153};
154
155struct binder_stats {
156 int br[_IOC_NR(BR_FAILED_REPLY) + 1];
157 int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
158 int obj_created[BINDER_STAT_COUNT];
159 int obj_deleted[BINDER_STAT_COUNT];
160};
161
162static struct binder_stats binder_stats;
163
164static inline void binder_stats_deleted(enum binder_stat_types type)
165{
166 binder_stats.obj_deleted[type]++;
167}
168
169static inline void binder_stats_created(enum binder_stat_types type)
170{
171 binder_stats.obj_created[type]++;
172}
173
174struct binder_transaction_log_entry {
175 int debug_id;
176 int call_type;
177 int from_proc;
178 int from_thread;
179 int target_handle;
180 int to_proc;
181 int to_thread;
182 int to_node;
183 int data_size;
184 int offsets_size;
185};
186struct binder_transaction_log {
187 int next;
188 int full;
189 struct binder_transaction_log_entry entry[32];
190};
191static struct binder_transaction_log binder_transaction_log;
192static struct binder_transaction_log binder_transaction_log_failed;
193
194static struct binder_transaction_log_entry *binder_transaction_log_add(
195 struct binder_transaction_log *log)
196{
197 struct binder_transaction_log_entry *e;
10f62861 198
355b0502
GKH		 199 e = &log->entry[log->next];
200 memset(e, 0, sizeof(*e));
201 log->next++;
202 if (log->next == ARRAY_SIZE(log->entry)) {
203 log->next = 0;
204 log->full = 1;
205 }
206 return e;
207}
208
209struct binder_work {
210 struct list_head entry;
211 enum {
212 BINDER_WORK_TRANSACTION = 1,
213 BINDER_WORK_TRANSACTION_COMPLETE,
214 BINDER_WORK_NODE,
215 BINDER_WORK_DEAD_BINDER,
216 BINDER_WORK_DEAD_BINDER_AND_CLEAR,
217 BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
218 } type;
219};
220
221struct binder_node {
222 int debug_id;
223 struct binder_work work;
224 union {
225 struct rb_node rb_node;
226 struct hlist_node dead_node;
227 };
228 struct binder_proc *proc;
229 struct hlist_head refs;
230 int internal_strong_refs;
231 int local_weak_refs;
232 int local_strong_refs;
da49889d
AH		 233 binder_uintptr_t ptr;
234 binder_uintptr_t cookie;
355b0502
GKH		 235 unsigned has_strong_ref:1;
236 unsigned pending_strong_ref:1;
237 unsigned has_weak_ref:1;
238 unsigned pending_weak_ref:1;
239 unsigned has_async_transaction:1;
240 unsigned accept_fds:1;
241 unsigned min_priority:8;
242 struct list_head async_todo;
243};
244
245struct binder_ref_death {
246 struct binder_work work;
da49889d 247 binder_uintptr_t cookie;
355b0502
GKH		 248};
249
250struct binder_ref {
251 /* Lookups needed: */
252 /* node + proc => ref (transaction) */
253 /* desc + proc => ref (transaction, inc/dec ref) */
254 /* node => refs + procs (proc exit) */
255 int debug_id;
256 struct rb_node rb_node_desc;
257 struct rb_node rb_node_node;
258 struct hlist_node node_entry;
259 struct binder_proc *proc;
260 struct binder_node *node;
261 uint32_t desc;
262 int strong;
263 int weak;
264 struct binder_ref_death *death;
265};
266
267struct binder_buffer {
217218f0 268 struct list_head entry; /* free and allocated entries by address */
355b0502
GKH		 269 struct rb_node rb_node; /* free entry by size or allocated entry */
270 /* by address */
271 unsigned free:1;
272 unsigned allow_user_free:1;
273 unsigned async_transaction:1;
274 unsigned debug_id:29;
275
276 struct binder_transaction *transaction;
277
278 struct binder_node *target_node;
279 size_t data_size;
280 size_t offsets_size;
281 uint8_t data[0];
282};
283
284enum binder_deferred_state {
285 BINDER_DEFERRED_PUT_FILES = 0x01,
286 BINDER_DEFERRED_FLUSH = 0x02,
287 BINDER_DEFERRED_RELEASE = 0x04,
288};
289
290struct binder_proc {
291 struct hlist_node proc_node;
292 struct rb_root threads;
293 struct rb_root nodes;
294 struct rb_root refs_by_desc;
295 struct rb_root refs_by_node;
296 int pid;
297 struct vm_area_struct *vma;
2a90957f 298 struct mm_struct *vma_vm_mm;
355b0502
GKH		 299 struct task_struct *tsk;
300 struct files_struct *files;
301 struct hlist_node deferred_work_node;
302 int deferred_work;
303 void *buffer;
304 ptrdiff_t user_buffer_offset;
305
306 struct list_head buffers;
307 struct rb_root free_buffers;
308 struct rb_root allocated_buffers;
309 size_t free_async_space;
310
311 struct page **pages;
312 size_t buffer_size;
313 uint32_t buffer_free;
314 struct list_head todo;
315 wait_queue_head_t wait;
316 struct binder_stats stats;
317 struct list_head delivered_death;
318 int max_threads;
319 int requested_threads;
320 int requested_threads_started;
321 int ready_threads;
322 long default_priority;
16b66554 323 struct dentry *debugfs_entry;
355b0502
GKH		 324};
325
326enum {
327 BINDER_LOOPER_STATE_REGISTERED = 0x01,
328 BINDER_LOOPER_STATE_ENTERED = 0x02,
329 BINDER_LOOPER_STATE_EXITED = 0x04,
330 BINDER_LOOPER_STATE_INVALID = 0x08,
331 BINDER_LOOPER_STATE_WAITING = 0x10,
332 BINDER_LOOPER_STATE_NEED_RETURN = 0x20
333};
334
335struct binder_thread {
336 struct binder_proc *proc;
337 struct rb_node rb_node;
338 int pid;
339 int looper;
340 struct binder_transaction *transaction_stack;
341 struct list_head todo;
342 uint32_t return_error; /* Write failed, return error code in read buf */
343 uint32_t return_error2; /* Write failed, return error code in read */
344 /* buffer. Used when sending a reply to a dead process that */
345 /* we are also waiting on */
346 wait_queue_head_t wait;
347 struct binder_stats stats;
348};
349
350struct binder_transaction {
351 int debug_id;
352 struct binder_work work;
353 struct binder_thread *from;
354 struct binder_transaction *from_parent;
355 struct binder_proc *to_proc;
356 struct binder_thread *to_thread;
357 struct binder_transaction *to_parent;
358 unsigned need_reply:1;
359 /* unsigned is_dead:1; */ /* not used at the moment */
360
361 struct binder_buffer *buffer;
362 unsigned int code;
363 unsigned int flags;
364 long priority;
365 long saved_priority;
4a2ebb93 366 kuid_t sender_euid;
355b0502
GKH		 367};
368
369static void
370binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
371
efde99cd 372static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
355b0502
GKH		 373{
374 struct files_struct *files = proc->files;
355b0502
GKH		 375 unsigned long rlim_cur;
376 unsigned long irqs;
377
378 if (files == NULL)
379 return -ESRCH;
380
dcfadfa4
AV		 381 if (!lock_task_sighand(proc->tsk, &irqs))
382 return -EMFILE;
bf202361 383
dcfadfa4
AV		 384 rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE);
385 unlock_task_sighand(proc->tsk, &irqs);
355b0502 386
dcfadfa4 387 return __alloc_fd(files, 0, rlim_cur, flags);
355b0502
GKH		 388}
389
390/*
391 * copied from fd_install
392 */
393static void task_fd_install(
394 struct binder_proc *proc, unsigned int fd, struct file *file)
395{
f869e8a7
AV		 396 if (proc->files)
397 __fd_install(proc->files, fd, file);
355b0502
GKH		 398}
399
400/*
401 * copied from sys_close
402 */
403static long task_close_fd(struct binder_proc *proc, unsigned int fd)
404{
355b0502
GKH		 405 int retval;
406
483ce1d4 407 if (proc->files == NULL)
355b0502
GKH		 408 return -ESRCH;
409
483ce1d4 410 retval = __close_fd(proc->files, fd);
355b0502
GKH		 411 /* can't restart close syscall because file table entry was cleared */
412 if (unlikely(retval == -ERESTARTSYS ||
413 retval == -ERESTARTNOINTR ||
414 retval == -ERESTARTNOHAND ||
415 retval == -ERESTART_RESTARTBLOCK))
416 retval = -EINTR;
417
418 return retval;
355b0502
GKH		 419}
420
975a1ac9
AH		 421static inline void binder_lock(const char *tag)
422{
423 trace_binder_lock(tag);
424 mutex_lock(&binder_main_lock);
425 trace_binder_locked(tag);
426}
427
428static inline void binder_unlock(const char *tag)
429{
430 trace_binder_unlock(tag);
431 mutex_unlock(&binder_main_lock);
432}
433
355b0502
GKH		 434static void binder_set_nice(long nice)
435{
436 long min_nice;
10f62861 437
355b0502
GKH		 438 if (can_nice(current, nice)) {
439 set_user_nice(current, nice);
440 return;
441 }
7aa2c016 442 min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur);
355b0502 443 binder_debug(BINDER_DEBUG_PRIORITY_CAP,
56b468fc
AS		 444 "%d: nice value %ld not allowed use %ld instead\n",
445 current->pid, nice, min_nice);
355b0502 446 set_user_nice(current, min_nice);
8698a745 447 if (min_nice <= MAX_NICE)
355b0502 448 return;
56b468fc 449 binder_user_error("%d RLIMIT_NICE not set\n", current->pid);
355b0502
GKH		 450}
451
452static size_t binder_buffer_size(struct binder_proc *proc,
453 struct binder_buffer *buffer)
454{
455 if (list_is_last(&buffer->entry, &proc->buffers))
456 return proc->buffer + proc->buffer_size - (void *)buffer->data;
7873311a
KN		 457 return (size_t)list_entry(buffer->entry.next,
458 struct binder_buffer, entry) - (size_t)buffer->data;
355b0502
GKH		 459}
460
461static void binder_insert_free_buffer(struct binder_proc *proc,
462 struct binder_buffer *new_buffer)
463{
464 struct rb_node **p = &proc->free_buffers.rb_node;
465 struct rb_node *parent = NULL;
466 struct binder_buffer *buffer;
467 size_t buffer_size;
468 size_t new_buffer_size;
469
470 BUG_ON(!new_buffer->free);
471
472 new_buffer_size = binder_buffer_size(proc, new_buffer);
473
474 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
56b468fc
AS		 475 "%d: add free buffer, size %zd, at %p\n",
476 proc->pid, new_buffer_size, new_buffer);
355b0502
GKH		 477
478 while (*p) {
479 parent = *p;
480 buffer = rb_entry(parent, struct binder_buffer, rb_node);
481 BUG_ON(!buffer->free);
482
483 buffer_size = binder_buffer_size(proc, buffer);
484
485 if (new_buffer_size < buffer_size)
486 p = &parent->rb_left;
487 else
488 p = &parent->rb_right;
489 }
490 rb_link_node(&new_buffer->rb_node, parent, p);
491 rb_insert_color(&new_buffer->rb_node, &proc->free_buffers);
492}
493
494static void binder_insert_allocated_buffer(struct binder_proc *proc,
495 struct binder_buffer *new_buffer)
496{
497 struct rb_node **p = &proc->allocated_buffers.rb_node;
498 struct rb_node *parent = NULL;
499 struct binder_buffer *buffer;
500
501 BUG_ON(new_buffer->free);
502
503 while (*p) {
504 parent = *p;
505 buffer = rb_entry(parent, struct binder_buffer, rb_node);
506 BUG_ON(buffer->free);
507
508 if (new_buffer < buffer)
509 p = &parent->rb_left;
510 else if (new_buffer > buffer)
511 p = &parent->rb_right;
512 else
513 BUG();
514 }
515 rb_link_node(&new_buffer->rb_node, parent, p);
516 rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers);
517}
518
519static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc,
da49889d 520 uintptr_t user_ptr)
355b0502
GKH		 521{
522 struct rb_node *n = proc->allocated_buffers.rb_node;
523 struct binder_buffer *buffer;
524 struct binder_buffer *kern_ptr;
525
da49889d
AH		 526 kern_ptr = (struct binder_buffer *)(user_ptr - proc->user_buffer_offset
527 - offsetof(struct binder_buffer, data));
355b0502
GKH		 528
529 while (n) {
530 buffer = rb_entry(n, struct binder_buffer, rb_node);
531 BUG_ON(buffer->free);
532
533 if (kern_ptr < buffer)
534 n = n->rb_left;
535 else if (kern_ptr > buffer)
536 n = n->rb_right;
537 else
538 return buffer;
539 }
540 return NULL;
541}
542
543static int binder_update_page_range(struct binder_proc *proc, int allocate,
544 void *start, void *end,
545 struct vm_area_struct *vma)
546{
547 void *page_addr;
548 unsigned long user_page_addr;
549 struct vm_struct tmp_area;
550 struct page **page;
551 struct mm_struct *mm;
552
553 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
56b468fc 554 "%d: %s pages %p-%p\n", proc->pid,
355b0502
GKH		 555 allocate ? "allocate" : "free", start, end);
556
557 if (end <= start)
558 return 0;
559
975a1ac9
AH		 560 trace_binder_update_page_range(proc, allocate, start, end);
561
355b0502
GKH		 562 if (vma)
563 mm = NULL;
564 else
565 mm = get_task_mm(proc->tsk);
566
567 if (mm) {
568 down_write(&mm->mmap_sem);
569 vma = proc->vma;
2a90957f 570 if (vma && mm != proc->vma_vm_mm) {
56b468fc 571 pr_err("%d: vma mm and task mm mismatch\n",
bd1eff97
AH		 572 proc->pid);
573 vma = NULL;
574 }
355b0502
GKH		 575 }
576
577 if (allocate == 0)
578 goto free_range;
579
580 if (vma == NULL) {
56b468fc
AS		 581 pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n",
582 proc->pid);
355b0502
GKH		 583 goto err_no_vma;
584 }
585
586 for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
587 int ret;
10f62861 588
355b0502
GKH		 589 page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
590
591 BUG_ON(*page);
585650dc 592 *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
355b0502 593 if (*page == NULL) {
56b468fc
AS		 594 pr_err("%d: binder_alloc_buf failed for page at %p\n",
595 proc->pid, page_addr);
355b0502
GKH		 596 goto err_alloc_page_failed;
597 }
598 tmp_area.addr = page_addr;
599 tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */;
f6f8ed47 600 ret = map_vm_area(&tmp_area, PAGE_KERNEL, page);
355b0502 601 if (ret) {
56b468fc 602 pr_err("%d: binder_alloc_buf failed to map page at %p in kernel\n",
355b0502
GKH		 603 proc->pid, page_addr);
604 goto err_map_kernel_failed;
605 }
606 user_page_addr =
607 (uintptr_t)page_addr + proc->user_buffer_offset;
608 ret = vm_insert_page(vma, user_page_addr, page[0]);
609 if (ret) {
56b468fc 610 pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
355b0502
GKH		 611 proc->pid, user_page_addr);
612 goto err_vm_insert_page_failed;
613 }
614 /* vm_insert_page does not seem to increment the refcount */
615 }
616 if (mm) {
617 up_write(&mm->mmap_sem);
618 mmput(mm);
619 }
620 return 0;
621
622free_range:
623 for (page_addr = end - PAGE_SIZE; page_addr >= start;
624 page_addr -= PAGE_SIZE) {
625 page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
626 if (vma)
627 zap_page_range(vma, (uintptr_t)page_addr +
628 proc->user_buffer_offset, PAGE_SIZE, NULL);
629err_vm_insert_page_failed:
630 unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
631err_map_kernel_failed:
632 __free_page(*page);
633 *page = NULL;
634err_alloc_page_failed:
635 ;
636 }
637err_no_vma:
638 if (mm) {
639 up_write(&mm->mmap_sem);
640 mmput(mm);
641 }
642 return -ENOMEM;
643}
644
645static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
646 size_t data_size,
647 size_t offsets_size, int is_async)
648{
649 struct rb_node *n = proc->free_buffers.rb_node;
650 struct binder_buffer *buffer;
651 size_t buffer_size;
652 struct rb_node *best_fit = NULL;
653 void *has_page_addr;
654 void *end_page_addr;
655 size_t size;
656
657 if (proc->vma == NULL) {
56b468fc 658 pr_err("%d: binder_alloc_buf, no vma\n",
355b0502
GKH		 659 proc->pid);
660 return NULL;
661 }
662
663 size = ALIGN(data_size, sizeof(void *)) +
664 ALIGN(offsets_size, sizeof(void *));
665
666 if (size < data_size || size < offsets_size) {
56b468fc
AS		 667 binder_user_error("%d: got transaction with invalid size %zd-%zd\n",
668 proc->pid, data_size, offsets_size);
355b0502
GKH		 669 return NULL;
670 }
671
672 if (is_async &&
673 proc->free_async_space < size + sizeof(struct binder_buffer)) {
674 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
56b468fc
AS		 675 "%d: binder_alloc_buf size %zd failed, no async space left\n",
676 proc->pid, size);
355b0502
GKH		 677 return NULL;
678 }
679
680 while (n) {
681 buffer = rb_entry(n, struct binder_buffer, rb_node);
682 BUG_ON(!buffer->free);
683 buffer_size = binder_buffer_size(proc, buffer);
684
685 if (size < buffer_size) {
686 best_fit = n;
687 n = n->rb_left;
688 } else if (size > buffer_size)
689 n = n->rb_right;
690 else {
691 best_fit = n;
692 break;
693 }
694 }
695 if (best_fit == NULL) {
56b468fc
AS		 696 pr_err("%d: binder_alloc_buf size %zd failed, no address space\n",
697 proc->pid, size);
355b0502
GKH		 698 return NULL;
699 }
700 if (n == NULL) {
701 buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
702 buffer_size = binder_buffer_size(proc, buffer);
703 }
704
705 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
56b468fc
AS		 706 "%d: binder_alloc_buf size %zd got buffer %p size %zd\n",
707 proc->pid, size, buffer, buffer_size);
355b0502
GKH		 708
709 has_page_addr =
710 (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK);
711 if (n == NULL) {
712 if (size + sizeof(struct binder_buffer) + 4 >= buffer_size)
713 buffer_size = size; /* no room for other buffers */
714 else
715 buffer_size = size + sizeof(struct binder_buffer);
716 }
717 end_page_addr =
718 (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size);
719 if (end_page_addr > has_page_addr)
720 end_page_addr = has_page_addr;
721 if (binder_update_page_range(proc, 1,
722 (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL))
723 return NULL;
724
725 rb_erase(best_fit, &proc->free_buffers);
726 buffer->free = 0;
727 binder_insert_allocated_buffer(proc, buffer);
728 if (buffer_size != size) {
729 struct binder_buffer *new_buffer = (void *)buffer->data + size;
10f62861 730
355b0502
GKH		 731 list_add(&new_buffer->entry, &buffer->entry);
732 new_buffer->free = 1;
733 binder_insert_free_buffer(proc, new_buffer);
734 }
735 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
56b468fc
AS		 736 "%d: binder_alloc_buf size %zd got %p\n",
737 proc->pid, size, buffer);
355b0502
GKH		 738 buffer->data_size = data_size;
739 buffer->offsets_size = offsets_size;
740 buffer->async_transaction = is_async;
741 if (is_async) {
742 proc->free_async_space -= size + sizeof(struct binder_buffer);
743 binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
56b468fc
AS		 744 "%d: binder_alloc_buf size %zd async free %zd\n",
745 proc->pid, size, proc->free_async_space);
355b0502
GKH		 746 }
747
748 return buffer;
749}
750
751static void *buffer_start_page(struct binder_buffer *buffer)
752{
753 return (void *)((uintptr_t)buffer & PAGE_MASK);
754}
755
756static void *buffer_end_page(struct binder_buffer *buffer)
757{
758 return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK);
759}
760
761static void binder_delete_free_buffer(struct binder_proc *proc,
762 struct binder_buffer *buffer)
763{
764 struct binder_buffer *prev, *next = NULL;
765 int free_page_end = 1;
766 int free_page_start = 1;
767
768 BUG_ON(proc->buffers.next == &buffer->entry);
769 prev = list_entry(buffer->entry.prev, struct binder_buffer, entry);
770 BUG_ON(!prev->free);
771 if (buffer_end_page(prev) == buffer_start_page(buffer)) {
772 free_page_start = 0;
773 if (buffer_end_page(prev) == buffer_end_page(buffer))
774 free_page_end = 0;
775 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
56b468fc
AS		 776 "%d: merge free, buffer %p share page with %p\n",
777 proc->pid, buffer, prev);
355b0502
GKH		 778 }
779
780 if (!list_is_last(&buffer->entry, &proc->buffers)) {
781 next = list_entry(buffer->entry.next,
782 struct binder_buffer, entry);
783 if (buffer_start_page(next) == buffer_end_page(buffer)) {
784 free_page_end = 0;
785 if (buffer_start_page(next) ==
786 buffer_start_page(buffer))
787 free_page_start = 0;
788 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
56b468fc
AS		 789 "%d: merge free, buffer %p share page with %p\n",
790 proc->pid, buffer, prev);
355b0502
GKH		 791 }
792 }
793 list_del(&buffer->entry);
794 if (free_page_start || free_page_end) {
795 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
1dcdbfd6 796 "%d: merge free, buffer %p do not share page%s%s with %p or %p\n",
355b0502
GKH		 797 proc->pid, buffer, free_page_start ? "" : " end",
798 free_page_end ? "" : " start", prev, next);
799 binder_update_page_range(proc, 0, free_page_start ?
800 buffer_start_page(buffer) : buffer_end_page(buffer),
801 (free_page_end ? buffer_end_page(buffer) :
802 buffer_start_page(buffer)) + PAGE_SIZE, NULL);
803 }
804}
805
806static void binder_free_buf(struct binder_proc *proc,
807 struct binder_buffer *buffer)
808{
809 size_t size, buffer_size;
810
811 buffer_size = binder_buffer_size(proc, buffer);
812
813 size = ALIGN(buffer->data_size, sizeof(void *)) +
814 ALIGN(buffer->offsets_size, sizeof(void *));
815
816 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
56b468fc
AS		 817 "%d: binder_free_buf %p size %zd buffer_size %zd\n",
818 proc->pid, buffer, size, buffer_size);
355b0502
GKH		 819
820 BUG_ON(buffer->free);
821 BUG_ON(size > buffer_size);
822 BUG_ON(buffer->transaction != NULL);
823 BUG_ON((void *)buffer < proc->buffer);
824 BUG_ON((void *)buffer > proc->buffer + proc->buffer_size);
825
826 if (buffer->async_transaction) {
827 proc->free_async_space += size + sizeof(struct binder_buffer);
828
829 binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
56b468fc
AS		 830 "%d: binder_free_buf size %zd async free %zd\n",
831 proc->pid, size, proc->free_async_space);
355b0502
GKH		 832 }
833
834 binder_update_page_range(proc, 0,
835 (void *)PAGE_ALIGN((uintptr_t)buffer->data),
836 (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK),
837 NULL);
838 rb_erase(&buffer->rb_node, &proc->allocated_buffers);
839 buffer->free = 1;
840 if (!list_is_last(&buffer->entry, &proc->buffers)) {
841 struct binder_buffer *next = list_entry(buffer->entry.next,
842 struct binder_buffer, entry);
10f62861 843
355b0502
GKH		 844 if (next->free) {
845 rb_erase(&next->rb_node, &proc->free_buffers);
846 binder_delete_free_buffer(proc, next);
847 }
848 }
849 if (proc->buffers.next != &buffer->entry) {
850 struct binder_buffer *prev = list_entry(buffer->entry.prev,
851 struct binder_buffer, entry);
10f62861 852
355b0502
GKH		 853 if (prev->free) {
854 binder_delete_free_buffer(proc, buffer);
855 rb_erase(&prev->rb_node, &proc->free_buffers);
856 buffer = prev;
857 }
858 }
859 binder_insert_free_buffer(proc, buffer);
860}
861
862static struct binder_node *binder_get_node(struct binder_proc *proc,
da49889d 863 binder_uintptr_t ptr)
355b0502
GKH		 864{
865 struct rb_node *n = proc->nodes.rb_node;
866 struct binder_node *node;
867
868 while (n) {
869 node = rb_entry(n, struct binder_node, rb_node);
870
871 if (ptr < node->ptr)
872 n = n->rb_left;
873 else if (ptr > node->ptr)
874 n = n->rb_right;
875 else
876 return node;
877 }
878 return NULL;
879}
880
881static struct binder_node *binder_new_node(struct binder_proc *proc,
da49889d
AH		 882 binder_uintptr_t ptr,
883 binder_uintptr_t cookie)
355b0502
GKH		 884{
885 struct rb_node **p = &proc->nodes.rb_node;
886 struct rb_node *parent = NULL;
887 struct binder_node *node;
888
889 while (*p) {
890 parent = *p;
891 node = rb_entry(parent, struct binder_node, rb_node);
892
893 if (ptr < node->ptr)
894 p = &(*p)->rb_left;
895 else if (ptr > node->ptr)
896 p = &(*p)->rb_right;
897 else
898 return NULL;
899 }
900
901 node = kzalloc(sizeof(*node), GFP_KERNEL);
902 if (node == NULL)
903 return NULL;
904 binder_stats_created(BINDER_STAT_NODE);
905 rb_link_node(&node->rb_node, parent, p);
906 rb_insert_color(&node->rb_node, &proc->nodes);
907 node->debug_id = ++binder_last_id;
908 node->proc = proc;
909 node->ptr = ptr;
910 node->cookie = cookie;
911 node->work.type = BINDER_WORK_NODE;
912 INIT_LIST_HEAD(&node->work.entry);
913 INIT_LIST_HEAD(&node->async_todo);
914 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
da49889d 915 "%d:%d node %d u%016llx c%016llx created\n",
355b0502 916 proc->pid, current->pid, node->debug_id,
da49889d 917 (u64)node->ptr, (u64)node->cookie);
355b0502
GKH		 918 return node;
919}
920
921static int binder_inc_node(struct binder_node *node, int strong, int internal,
922 struct list_head *target_list)
923{
924 if (strong) {
925 if (internal) {
926 if (target_list == NULL &&
927 node->internal_strong_refs == 0 &&
928 !(node == binder_context_mgr_node &&
929 node->has_strong_ref)) {
56b468fc
AS		 930 pr_err("invalid inc strong node for %d\n",
931 node->debug_id);
355b0502
GKH		 932 return -EINVAL;
933 }
934 node->internal_strong_refs++;
935 } else
936 node->local_strong_refs++;
937 if (!node->has_strong_ref && target_list) {
938 list_del_init(&node->work.entry);
939 list_add_tail(&node->work.entry, target_list);
940 }
941 } else {
942 if (!internal)
943 node->local_weak_refs++;
944 if (!node->has_weak_ref && list_empty(&node->work.entry)) {
945 if (target_list == NULL) {
56b468fc
AS		 946 pr_err("invalid inc weak node for %d\n",
947 node->debug_id);
355b0502
GKH		 948 return -EINVAL;
949 }
950 list_add_tail(&node->work.entry, target_list);
951 }
952 }
953 return 0;
954}
955
956static int binder_dec_node(struct binder_node *node, int strong, int internal)
957{
958 if (strong) {
959 if (internal)
960 node->internal_strong_refs--;
961 else
962 node->local_strong_refs--;
963 if (node->local_strong_refs || node->internal_strong_refs)
964 return 0;
965 } else {
966 if (!internal)
967 node->local_weak_refs--;
968 if (node->local_weak_refs || !hlist_empty(&node->refs))
969 return 0;
970 }
971 if (node->proc && (node->has_strong_ref || node->has_weak_ref)) {
972 if (list_empty(&node->work.entry)) {
973 list_add_tail(&node->work.entry, &node->proc->todo);
974 wake_up_interruptible(&node->proc->wait);
975 }
976 } else {
977 if (hlist_empty(&node->refs) && !node->local_strong_refs &&
978 !node->local_weak_refs) {
979 list_del_init(&node->work.entry);
980 if (node->proc) {
981 rb_erase(&node->rb_node, &node->proc->nodes);
982 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
56b468fc 983 "refless node %d deleted\n",
355b0502
GKH		 984 node->debug_id);
985 } else {
986 hlist_del(&node->dead_node);
987 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
56b468fc 988 "dead node %d deleted\n",
355b0502
GKH		 989 node->debug_id);
990 }
991 kfree(node);
992 binder_stats_deleted(BINDER_STAT_NODE);
993 }
994 }
995
996 return 0;
997}
998
999
1000static struct binder_ref *binder_get_ref(struct binder_proc *proc,
1001 uint32_t desc)
1002{
1003 struct rb_node *n = proc->refs_by_desc.rb_node;
1004 struct binder_ref *ref;
1005
1006 while (n) {
1007 ref = rb_entry(n, struct binder_ref, rb_node_desc);
1008
1009 if (desc < ref->desc)
1010 n = n->rb_left;
1011 else if (desc > ref->desc)
1012 n = n->rb_right;
1013 else
1014 return ref;
1015 }
1016 return NULL;
1017}
1018
1019static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc,
1020 struct binder_node *node)
1021{
1022 struct rb_node *n;
1023 struct rb_node **p = &proc->refs_by_node.rb_node;
1024 struct rb_node *parent = NULL;
1025 struct binder_ref *ref, *new_ref;
1026
1027 while (*p) {
1028 parent = *p;
1029 ref = rb_entry(parent, struct binder_ref, rb_node_node);
1030
1031 if (node < ref->node)
1032 p = &(*p)->rb_left;
1033 else if (node > ref->node)
1034 p = &(*p)->rb_right;
1035 else
1036 return ref;
1037 }
1038 new_ref = kzalloc(sizeof(*ref), GFP_KERNEL);
1039 if (new_ref == NULL)
1040 return NULL;
1041 binder_stats_created(BINDER_STAT_REF);
1042 new_ref->debug_id = ++binder_last_id;
1043 new_ref->proc = proc;
1044 new_ref->node = node;
1045 rb_link_node(&new_ref->rb_node_node, parent, p);
1046 rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
1047
1048 new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1;
1049 for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
1050 ref = rb_entry(n, struct binder_ref, rb_node_desc);
1051 if (ref->desc > new_ref->desc)
1052 break;
1053 new_ref->desc = ref->desc + 1;
1054 }
1055
1056 p = &proc->refs_by_desc.rb_node;
1057 while (*p) {
1058 parent = *p;
1059 ref = rb_entry(parent, struct binder_ref, rb_node_desc);
1060
1061 if (new_ref->desc < ref->desc)
1062 p = &(*p)->rb_left;
1063 else if (new_ref->desc > ref->desc)
1064 p = &(*p)->rb_right;
1065 else
1066 BUG();
1067 }
1068 rb_link_node(&new_ref->rb_node_desc, parent, p);
1069 rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc);
1070 if (node) {
1071 hlist_add_head(&new_ref->node_entry, &node->refs);
1072
1073 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
56b468fc
AS		 1074 "%d new ref %d desc %d for node %d\n",
1075 proc->pid, new_ref->debug_id, new_ref->desc,
1076 node->debug_id);
355b0502
GKH		 1077 } else {
1078 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
56b468fc
AS		 1079 "%d new ref %d desc %d for dead node\n",
1080 proc->pid, new_ref->debug_id, new_ref->desc);
355b0502
GKH		 1081 }
1082 return new_ref;
1083}
1084
1085static void binder_delete_ref(struct binder_ref *ref)
1086{
1087 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
56b468fc
AS		 1088 "%d delete ref %d desc %d for node %d\n",
1089 ref->proc->pid, ref->debug_id, ref->desc,
1090 ref->node->debug_id);
355b0502
GKH		 1091
1092 rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc);
1093 rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node);
1094 if (ref->strong)
1095 binder_dec_node(ref->node, 1, 1);
1096 hlist_del(&ref->node_entry);
1097 binder_dec_node(ref->node, 0, 1);
1098 if (ref->death) {
1099 binder_debug(BINDER_DEBUG_DEAD_BINDER,
56b468fc
AS		 1100 "%d delete ref %d desc %d has death notification\n",
1101 ref->proc->pid, ref->debug_id, ref->desc);
355b0502
GKH		 1102 list_del(&ref->death->work.entry);
1103 kfree(ref->death);
1104 binder_stats_deleted(BINDER_STAT_DEATH);
1105 }
1106 kfree(ref);
1107 binder_stats_deleted(BINDER_STAT_REF);
1108}
1109
1110static int binder_inc_ref(struct binder_ref *ref, int strong,
1111 struct list_head *target_list)
1112{
1113 int ret;
10f62861 1114
355b0502
GKH		 1115 if (strong) {
1116 if (ref->strong == 0) {
1117 ret = binder_inc_node(ref->node, 1, 1, target_list);
1118 if (ret)
1119 return ret;
1120 }
1121 ref->strong++;
1122 } else {
1123 if (ref->weak == 0) {
1124 ret = binder_inc_node(ref->node, 0, 1, target_list);
1125 if (ret)
1126 return ret;
1127 }
1128 ref->weak++;
1129 }
1130 return 0;
1131}
1132
1133
1134static int binder_dec_ref(struct binder_ref *ref, int strong)
1135{
1136 if (strong) {
1137 if (ref->strong == 0) {
56b468fc 1138 binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n",
355b0502
GKH		 1139 ref->proc->pid, ref->debug_id,
1140 ref->desc, ref->strong, ref->weak);
1141 return -EINVAL;
1142 }
1143 ref->strong--;
1144 if (ref->strong == 0) {
1145 int ret;
10f62861 1146
355b0502
GKH		 1147 ret = binder_dec_node(ref->node, strong, 1);
1148 if (ret)
1149 return ret;
1150 }
1151 } else {
1152 if (ref->weak == 0) {
56b468fc 1153 binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n",
355b0502
GKH		 1154 ref->proc->pid, ref->debug_id,
1155 ref->desc, ref->strong, ref->weak);
1156 return -EINVAL;
1157 }
1158 ref->weak--;
1159 }
1160 if (ref->strong == 0 && ref->weak == 0)
1161 binder_delete_ref(ref);
1162 return 0;
1163}
1164
1165static void binder_pop_transaction(struct binder_thread *target_thread,
1166 struct binder_transaction *t)
1167{
1168 if (target_thread) {
1169 BUG_ON(target_thread->transaction_stack != t);
1170 BUG_ON(target_thread->transaction_stack->from != target_thread);
1171 target_thread->transaction_stack =
1172 target_thread->transaction_stack->from_parent;
1173 t->from = NULL;
1174 }
1175 t->need_reply = 0;
1176 if (t->buffer)
1177 t->buffer->transaction = NULL;
1178 kfree(t);
1179 binder_stats_deleted(BINDER_STAT_TRANSACTION);
1180}
1181
1182static void binder_send_failed_reply(struct binder_transaction *t,
1183 uint32_t error_code)
1184{
1185 struct binder_thread *target_thread;
d4ec15e1 1186 struct binder_transaction *next;
10f62861 1187
355b0502
GKH		 1188 BUG_ON(t->flags & TF_ONE_WAY);
1189 while (1) {
1190 target_thread = t->from;
1191 if (target_thread) {
1192 if (target_thread->return_error != BR_OK &&
1193 target_thread->return_error2 == BR_OK) {
1194 target_thread->return_error2 =
1195 target_thread->return_error;
1196 target_thread->return_error = BR_OK;
1197 }
1198 if (target_thread->return_error == BR_OK) {
1199 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
56b468fc 1200 "send failed reply for transaction %d to %d:%d\n",
0232a42c
WP		 1201 t->debug_id,
1202 target_thread->proc->pid,
355b0502
GKH		 1203 target_thread->pid);
1204
1205 binder_pop_transaction(target_thread, t);
1206 target_thread->return_error = error_code;
1207 wake_up_interruptible(&target_thread->wait);
1208 } else {
56b468fc
AS		 1209 pr_err("reply failed, target thread, %d:%d, has error code %d already\n",
1210 target_thread->proc->pid,
355b0502
GKH		 1211 target_thread->pid,
1212 target_thread->return_error);
1213 }
1214 return;
d4ec15e1
LT		 1215 }
1216 next = t->from_parent;
1217
1218 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
1219 "send failed reply for transaction %d, target dead\n",
1220 t->debug_id);
1221
1222 binder_pop_transaction(target_thread, t);
1223 if (next == NULL) {
355b0502 1224 binder_debug(BINDER_DEBUG_DEAD_BINDER,
d4ec15e1
LT		 1225 "reply failed, no target thread at root\n");
1226 return;
355b0502 1227 }
d4ec15e1
LT		 1228 t = next;
1229 binder_debug(BINDER_DEBUG_DEAD_BINDER,
1230 "reply failed, no target thread -- retry %d\n",
1231 t->debug_id);
355b0502
GKH		 1232 }
1233}
1234
1235static void binder_transaction_buffer_release(struct binder_proc *proc,
1236 struct binder_buffer *buffer,
da49889d 1237 binder_size_t *failed_at)
355b0502 1238{
da49889d 1239 binder_size_t *offp, *off_end;
355b0502
GKH		 1240 int debug_id = buffer->debug_id;
1241
1242 binder_debug(BINDER_DEBUG_TRANSACTION,
56b468fc 1243 "%d buffer release %d, size %zd-%zd, failed at %p\n",
355b0502
GKH		 1244 proc->pid, buffer->debug_id,
1245 buffer->data_size, buffer->offsets_size, failed_at);
1246
1247 if (buffer->target_node)
1248 binder_dec_node(buffer->target_node, 1, 0);
1249
da49889d
AH		 1250 offp = (binder_size_t *)(buffer->data +
1251 ALIGN(buffer->data_size, sizeof(void *)));
355b0502
GKH		 1252 if (failed_at)
1253 off_end = failed_at;
1254 else
1255 off_end = (void *)offp + buffer->offsets_size;
1256 for (; offp < off_end; offp++) {
1257 struct flat_binder_object *fp;
10f62861 1258
355b0502
GKH		 1259 if (*offp > buffer->data_size - sizeof(*fp) ||
1260 buffer->data_size < sizeof(*fp) ||
ec35e852 1261 !IS_ALIGNED(*offp, sizeof(u32))) {
da49889d
AH		 1262 pr_err("transaction release %d bad offset %lld, size %zd\n",
1263 debug_id, (u64)*offp, buffer->data_size);
355b0502
GKH		 1264 continue;
1265 }
1266 fp = (struct flat_binder_object *)(buffer->data + *offp);
1267 switch (fp->type) {
1268 case BINDER_TYPE_BINDER:
1269 case BINDER_TYPE_WEAK_BINDER: {
1270 struct binder_node *node = binder_get_node(proc, fp->binder);
10f62861 1271
355b0502 1272 if (node == NULL) {
da49889d
AH		 1273 pr_err("transaction release %d bad node %016llx\n",
1274 debug_id, (u64)fp->binder);
355b0502
GKH		 1275 break;
1276 }
1277 binder_debug(BINDER_DEBUG_TRANSACTION,
da49889d
AH		 1278 " node %d u%016llx\n",
1279 node->debug_id, (u64)node->ptr);
355b0502
GKH		 1280 binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
1281 } break;
1282 case BINDER_TYPE_HANDLE:
1283 case BINDER_TYPE_WEAK_HANDLE: {
1284 struct binder_ref *ref = binder_get_ref(proc, fp->handle);
10f62861 1285
355b0502 1286 if (ref == NULL) {
64dcfe6b 1287 pr_err("transaction release %d bad handle %d\n",
56b468fc 1288 debug_id, fp->handle);
355b0502
GKH		 1289 break;
1290 }
1291 binder_debug(BINDER_DEBUG_TRANSACTION,
1292 " ref %d desc %d (node %d)\n",
1293 ref->debug_id, ref->desc, ref->node->debug_id);
1294 binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE);
1295 } break;
1296
1297 case BINDER_TYPE_FD:
1298 binder_debug(BINDER_DEBUG_TRANSACTION,
64dcfe6b 1299 " fd %d\n", fp->handle);
355b0502
GKH		 1300 if (failed_at)
1301 task_close_fd(proc, fp->handle);
1302 break;
1303
1304 default:
64dcfe6b 1305 pr_err("transaction release %d bad object type %x\n",
56b468fc 1306 debug_id, fp->type);
355b0502
GKH		 1307 break;
1308 }
1309 }
1310}
1311
1312static void binder_transaction(struct binder_proc *proc,
1313 struct binder_thread *thread,
1314 struct binder_transaction_data *tr, int reply)
1315{
1316 struct binder_transaction *t;
1317 struct binder_work *tcomplete;
da49889d 1318 binder_size_t *offp, *off_end;
355b0502
GKH		 1319 struct binder_proc *target_proc;
1320 struct binder_thread *target_thread = NULL;
1321 struct binder_node *target_node = NULL;
1322 struct list_head *target_list;
1323 wait_queue_head_t *target_wait;
1324 struct binder_transaction *in_reply_to = NULL;
1325 struct binder_transaction_log_entry *e;
1326 uint32_t return_error;
1327
1328 e = binder_transaction_log_add(&binder_transaction_log);
1329 e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
1330 e->from_proc = proc->pid;
1331 e->from_thread = thread->pid;
1332 e->target_handle = tr->target.handle;
1333 e->data_size = tr->data_size;
1334 e->offsets_size = tr->offsets_size;
1335
1336 if (reply) {
1337 in_reply_to = thread->transaction_stack;
1338 if (in_reply_to == NULL) {
56b468fc 1339 binder_user_error("%d:%d got reply transaction with no transaction stack\n",
355b0502
GKH		 1340 proc->pid, thread->pid);
1341 return_error = BR_FAILED_REPLY;
1342 goto err_empty_call_stack;
1343 }
1344 binder_set_nice(in_reply_to->saved_priority);
1345 if (in_reply_to->to_thread != thread) {
56b468fc 1346 binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n",
355b0502
GKH		 1347 proc->pid, thread->pid, in_reply_to->debug_id,
1348 in_reply_to->to_proc ?
1349 in_reply_to->to_proc->pid : 0,
1350 in_reply_to->to_thread ?
1351 in_reply_to->to_thread->pid : 0);
1352 return_error = BR_FAILED_REPLY;
1353 in_reply_to = NULL;
1354 goto err_bad_call_stack;
1355 }
1356 thread->transaction_stack = in_reply_to->to_parent;
1357 target_thread = in_reply_to->from;
1358 if (target_thread == NULL) {
1359 return_error = BR_DEAD_REPLY;
1360 goto err_dead_binder;
1361 }
1362 if (target_thread->transaction_stack != in_reply_to) {
56b468fc 1363 binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n",
355b0502
GKH		 1364 proc->pid, thread->pid,
1365 target_thread->transaction_stack ?
1366 target_thread->transaction_stack->debug_id : 0,
1367 in_reply_to->debug_id);
1368 return_error = BR_FAILED_REPLY;
1369 in_reply_to = NULL;
1370 target_thread = NULL;
1371 goto err_dead_binder;
1372 }
1373 target_proc = target_thread->proc;
1374 } else {
1375 if (tr->target.handle) {
1376 struct binder_ref *ref;
10f62861 1377
355b0502
GKH		 1378 ref = binder_get_ref(proc, tr->target.handle);
1379 if (ref == NULL) {
56b468fc 1380 binder_user_error("%d:%d got transaction to invalid handle\n",
355b0502
GKH		 1381 proc->pid, thread->pid);
1382 return_error = BR_FAILED_REPLY;
1383 goto err_invalid_target_handle;
1384 }
1385 target_node = ref->node;
1386 } else {
1387 target_node = binder_context_mgr_node;
1388 if (target_node == NULL) {
1389 return_error = BR_DEAD_REPLY;
1390 goto err_no_context_mgr_node;
1391 }
1392 }
1393 e->to_node = target_node->debug_id;
1394 target_proc = target_node->proc;
1395 if (target_proc == NULL) {
1396 return_error = BR_DEAD_REPLY;
1397 goto err_dead_binder;
1398 }
1399 if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) {
1400 struct binder_transaction *tmp;
10f62861 1401
355b0502
GKH		 1402 tmp = thread->transaction_stack;
1403 if (tmp->to_thread != thread) {
56b468fc 1404 binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n",
355b0502
GKH		 1405 proc->pid, thread->pid, tmp->debug_id,
1406 tmp->to_proc ? tmp->to_proc->pid : 0,
1407 tmp->to_thread ?
1408 tmp->to_thread->pid : 0);
1409 return_error = BR_FAILED_REPLY;
1410 goto err_bad_call_stack;
1411 }
1412 while (tmp) {
1413 if (tmp->from && tmp->from->proc == target_proc)
1414 target_thread = tmp->from;
1415 tmp = tmp->from_parent;
1416 }
1417 }
1418 }
1419 if (target_thread) {
1420 e->to_thread = target_thread->pid;
1421 target_list = &target_thread->todo;
1422 target_wait = &target_thread->wait;
1423 } else {
1424 target_list = &target_proc->todo;
1425 target_wait = &target_proc->wait;
1426 }
1427 e->to_proc = target_proc->pid;
1428
1429 /* TODO: reuse incoming transaction for reply */
1430 t = kzalloc(sizeof(*t), GFP_KERNEL);
1431 if (t == NULL) {
1432 return_error = BR_FAILED_REPLY;
1433 goto err_alloc_t_failed;
1434 }
1435 binder_stats_created(BINDER_STAT_TRANSACTION);
1436
1437 tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
1438 if (tcomplete == NULL) {
1439 return_error = BR_FAILED_REPLY;
1440 goto err_alloc_tcomplete_failed;
1441 }
1442 binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE);
1443
1444 t->debug_id = ++binder_last_id;
1445 e->debug_id = t->debug_id;
1446
1447 if (reply)
1448 binder_debug(BINDER_DEBUG_TRANSACTION,
da49889d 1449 "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld\n",
355b0502
GKH		 1450 proc->pid, thread->pid, t->debug_id,
1451 target_proc->pid, target_thread->pid,
da49889d
AH		 1452 (u64)tr->data.ptr.buffer,
1453 (u64)tr->data.ptr.offsets,
1454 (u64)tr->data_size, (u64)tr->offsets_size);
355b0502
GKH		 1455 else
1456 binder_debug(BINDER_DEBUG_TRANSACTION,
da49889d 1457 "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld\n",
355b0502
GKH		 1458 proc->pid, thread->pid, t->debug_id,
1459 target_proc->pid, target_node->debug_id,
da49889d
AH		 1460 (u64)tr->data.ptr.buffer,
1461 (u64)tr->data.ptr.offsets,
1462 (u64)tr->data_size, (u64)tr->offsets_size);
355b0502
GKH		 1463
1464 if (!reply && !(tr->flags & TF_ONE_WAY))
1465 t->from = thread;
1466 else
1467 t->from = NULL;
57bab7cb 1468 t->sender_euid = task_euid(proc->tsk);
355b0502
GKH		 1469 t->to_proc = target_proc;
1470 t->to_thread = target_thread;
1471 t->code = tr->code;
1472 t->flags = tr->flags;
1473 t->priority = task_nice(current);
975a1ac9
AH		 1474
1475 trace_binder_transaction(reply, t, target_node);
1476
355b0502
GKH		 1477 t->buffer = binder_alloc_buf(target_proc, tr->data_size,
1478 tr->offsets_size, !reply && (t->flags & TF_ONE_WAY));
1479 if (t->buffer == NULL) {
1480 return_error = BR_FAILED_REPLY;
1481 goto err_binder_alloc_buf_failed;
1482 }
1483 t->buffer->allow_user_free = 0;
1484 t->buffer->debug_id = t->debug_id;
1485 t->buffer->transaction = t;
1486 t->buffer->target_node = target_node;
975a1ac9 1487 trace_binder_transaction_alloc_buf(t->buffer);
355b0502
GKH		 1488 if (target_node)
1489 binder_inc_node(target_node, 1, 0, NULL);
1490
da49889d
AH		 1491 offp = (binder_size_t *)(t->buffer->data +
1492 ALIGN(tr->data_size, sizeof(void *)));
355b0502 1493
da49889d
AH		 1494 if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t)
1495 tr->data.ptr.buffer, tr->data_size)) {
56b468fc
AS		 1496 binder_user_error("%d:%d got transaction with invalid data ptr\n",
1497 proc->pid, thread->pid);
355b0502
GKH		 1498 return_error = BR_FAILED_REPLY;
1499 goto err_copy_data_failed;
1500 }
da49889d
AH		 1501 if (copy_from_user(offp, (const void __user *)(uintptr_t)
1502 tr->data.ptr.offsets, tr->offsets_size)) {
56b468fc
AS		 1503 binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
1504 proc->pid, thread->pid);
355b0502
GKH		 1505 return_error = BR_FAILED_REPLY;
1506 goto err_copy_data_failed;
1507 }
da49889d
AH		 1508 if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) {
1509 binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n",
1510 proc->pid, thread->pid, (u64)tr->offsets_size);
355b0502
GKH		 1511 return_error = BR_FAILED_REPLY;
1512 goto err_bad_offset;
1513 }
1514 off_end = (void *)offp + tr->offsets_size;
1515 for (; offp < off_end; offp++) {
1516 struct flat_binder_object *fp;
10f62861 1517
355b0502
GKH		 1518 if (*offp > t->buffer->data_size - sizeof(*fp) ||
1519 t->buffer->data_size < sizeof(*fp) ||
ec35e852 1520 !IS_ALIGNED(*offp, sizeof(u32))) {
da49889d
AH		 1521 binder_user_error("%d:%d got transaction with invalid offset, %lld\n",
1522 proc->pid, thread->pid, (u64)*offp);
355b0502
GKH		 1523 return_error = BR_FAILED_REPLY;
1524 goto err_bad_offset;
1525 }
1526 fp = (struct flat_binder_object *)(t->buffer->data + *offp);
1527 switch (fp->type) {
1528 case BINDER_TYPE_BINDER:
1529 case BINDER_TYPE_WEAK_BINDER: {
1530 struct binder_ref *ref;
1531 struct binder_node *node = binder_get_node(proc, fp->binder);
10f62861 1532
355b0502
GKH		 1533 if (node == NULL) {
1534 node = binder_new_node(proc, fp->binder, fp->cookie);
1535 if (node == NULL) {
1536 return_error = BR_FAILED_REPLY;
1537 goto err_binder_new_node_failed;
1538 }
1539 node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
1540 node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
1541 }
1542 if (fp->cookie != node->cookie) {
da49889d 1543 binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
355b0502 1544 proc->pid, thread->pid,
da49889d
AH		 1545 (u64)fp->binder, node->debug_id,
1546 (u64)fp->cookie, (u64)node->cookie);
7d42043f 1547 return_error = BR_FAILED_REPLY;
355b0502
GKH		 1548 goto err_binder_get_ref_for_node_failed;
1549 }
1550 ref = binder_get_ref_for_node(target_proc, node);
1551 if (ref == NULL) {
1552 return_error = BR_FAILED_REPLY;
1553 goto err_binder_get_ref_for_node_failed;
1554 }
1555 if (fp->type == BINDER_TYPE_BINDER)
1556 fp->type = BINDER_TYPE_HANDLE;
1557 else
1558 fp->type = BINDER_TYPE_WEAK_HANDLE;
1559 fp->handle = ref->desc;
1560 binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE,
1561 &thread->todo);
1562
975a1ac9 1563 trace_binder_transaction_node_to_ref(t, node, ref);
355b0502 1564 binder_debug(BINDER_DEBUG_TRANSACTION,
da49889d
AH		 1565 " node %d u%016llx -> ref %d desc %d\n",
1566 node->debug_id, (u64)node->ptr,
1567 ref->debug_id, ref->desc);
355b0502
GKH		 1568 } break;
1569 case BINDER_TYPE_HANDLE:
1570 case BINDER_TYPE_WEAK_HANDLE: {
1571 struct binder_ref *ref = binder_get_ref(proc, fp->handle);
10f62861 1572
355b0502 1573 if (ref == NULL) {
64dcfe6b 1574 binder_user_error("%d:%d got transaction with invalid handle, %d\n",
56b468fc
AS		 1575 proc->pid,
1576 thread->pid, fp->handle);
355b0502
GKH		 1577 return_error = BR_FAILED_REPLY;
1578 goto err_binder_get_ref_failed;
1579 }
1580 if (ref->node->proc == target_proc) {
1581 if (fp->type == BINDER_TYPE_HANDLE)
1582 fp->type = BINDER_TYPE_BINDER;
1583 else
1584 fp->type = BINDER_TYPE_WEAK_BINDER;
1585 fp->binder = ref->node->ptr;
1586 fp->cookie = ref->node->cookie;
1587 binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL);
975a1ac9 1588 trace_binder_transaction_ref_to_node(t, ref);
355b0502 1589 binder_debug(BINDER_DEBUG_TRANSACTION,
da49889d 1590 " ref %d desc %d -> node %d u%016llx\n",
355b0502 1591 ref->debug_id, ref->desc, ref->node->debug_id,
da49889d 1592 (u64)ref->node->ptr);
355b0502
GKH		 1593 } else {
1594 struct binder_ref *new_ref;
10f62861 1595
355b0502
GKH		 1596 new_ref = binder_get_ref_for_node(target_proc, ref->node);
1597 if (new_ref == NULL) {
1598 return_error = BR_FAILED_REPLY;
1599 goto err_binder_get_ref_for_node_failed;
1600 }
1601 fp->handle = new_ref->desc;
1602 binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
975a1ac9
AH		 1603 trace_binder_transaction_ref_to_ref(t, ref,
1604 new_ref);
355b0502
GKH		 1605 binder_debug(BINDER_DEBUG_TRANSACTION,
1606 " ref %d desc %d -> ref %d desc %d (node %d)\n",
1607 ref->debug_id, ref->desc, new_ref->debug_id,
1608 new_ref->desc, ref->node->debug_id);
1609 }
1610 } break;
1611
1612 case BINDER_TYPE_FD: {
1613 int target_fd;
1614 struct file *file;
1615
1616 if (reply) {
1617 if (!(in_reply_to->flags & TF_ACCEPT_FDS)) {
64dcfe6b 1618 binder_user_error("%d:%d got reply with fd, %d, but target does not allow fds\n",
355b0502
GKH		 1619 proc->pid, thread->pid, fp->handle);
1620 return_error = BR_FAILED_REPLY;
1621 goto err_fd_not_allowed;
1622 }
1623 } else if (!target_node->accept_fds) {
64dcfe6b 1624 binder_user_error("%d:%d got transaction with fd, %d, but target does not allow fds\n",
355b0502
GKH		 1625 proc->pid, thread->pid, fp->handle);
1626 return_error = BR_FAILED_REPLY;
1627 goto err_fd_not_allowed;
1628 }
1629
1630 file = fget(fp->handle);
1631 if (file == NULL) {
64dcfe6b 1632 binder_user_error("%d:%d got transaction with invalid fd, %d\n",
355b0502
GKH		 1633 proc->pid, thread->pid, fp->handle);
1634 return_error = BR_FAILED_REPLY;
1635 goto err_fget_failed;
1636 }
1637 target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC);
1638 if (target_fd < 0) {
1639 fput(file);
1640 return_error = BR_FAILED_REPLY;
1641 goto err_get_unused_fd_failed;
1642 }
1643 task_fd_install(target_proc, target_fd, file);
975a1ac9 1644 trace_binder_transaction_fd(t, fp->handle, target_fd);
355b0502 1645 binder_debug(BINDER_DEBUG_TRANSACTION,
64dcfe6b 1646 " fd %d -> %d\n", fp->handle, target_fd);
355b0502
GKH		 1647 /* TODO: fput? */
1648 fp->handle = target_fd;
1649 } break;
1650
1651 default:
64dcfe6b 1652 binder_user_error("%d:%d got transaction with invalid object type, %x\n",
355b0502
GKH		 1653 proc->pid, thread->pid, fp->type);
1654 return_error = BR_FAILED_REPLY;
1655 goto err_bad_object_type;
1656 }
1657 }
1658 if (reply) {
1659 BUG_ON(t->buffer->async_transaction != 0);
1660 binder_pop_transaction(target_thread, in_reply_to);
1661 } else if (!(t->flags & TF_ONE_WAY)) {
1662 BUG_ON(t->buffer->async_transaction != 0);
1663 t->need_reply = 1;
1664 t->from_parent = thread->transaction_stack;
1665 thread->transaction_stack = t;
1666 } else {
1667 BUG_ON(target_node == NULL);
1668 BUG_ON(t->buffer->async_transaction != 1);
1669 if (target_node->has_async_transaction) {
1670 target_list = &target_node->async_todo;
1671 target_wait = NULL;
1672 } else
1673 target_node->has_async_transaction = 1;
1674 }
1675 t->work.type = BINDER_WORK_TRANSACTION;
1676 list_add_tail(&t->work.entry, target_list);
1677 tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE;
1678 list_add_tail(&tcomplete->entry, &thread->todo);
1679 if (target_wait)
1680 wake_up_interruptible(target_wait);
1681 return;
1682
1683err_get_unused_fd_failed:
1684err_fget_failed:
1685err_fd_not_allowed:
1686err_binder_get_ref_for_node_failed:
1687err_binder_get_ref_failed:
1688err_binder_new_node_failed:
1689err_bad_object_type:
1690err_bad_offset:
1691err_copy_data_failed:
975a1ac9 1692 trace_binder_transaction_failed_buffer_release(t->buffer);
355b0502
GKH		 1693 binder_transaction_buffer_release(target_proc, t->buffer, offp);
1694 t->buffer->transaction = NULL;
1695 binder_free_buf(target_proc, t->buffer);
1696err_binder_alloc_buf_failed:
1697 kfree(tcomplete);
1698 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
1699err_alloc_tcomplete_failed:
1700 kfree(t);
1701 binder_stats_deleted(BINDER_STAT_TRANSACTION);
1702err_alloc_t_failed:
1703err_bad_call_stack:
1704err_empty_call_stack:
1705err_dead_binder:
1706err_invalid_target_handle:
1707err_no_context_mgr_node:
1708 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
da49889d 1709 "%d:%d transaction failed %d, size %lld-%lld\n",
355b0502 1710 proc->pid, thread->pid, return_error,
da49889d 1711 (u64)tr->data_size, (u64)tr->offsets_size);
355b0502
GKH		 1712
1713 {
1714 struct binder_transaction_log_entry *fe;
10f62861 1715
355b0502
GKH		 1716 fe = binder_transaction_log_add(&binder_transaction_log_failed);
1717 *fe = *e;
1718 }
1719
1720 BUG_ON(thread->return_error != BR_OK);
1721 if (in_reply_to) {
1722 thread->return_error = BR_TRANSACTION_COMPLETE;
1723 binder_send_failed_reply(in_reply_to, return_error);
1724 } else
1725 thread->return_error = return_error;
1726}
1727
fb07ebc3
BP		 1728static int binder_thread_write(struct binder_proc *proc,
1729 struct binder_thread *thread,
da49889d
AH		 1730 binder_uintptr_t binder_buffer, size_t size,
1731 binder_size_t *consumed)
355b0502
GKH		 1732{
1733 uint32_t cmd;
da49889d 1734 void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
355b0502
GKH		 1735 void __user *ptr = buffer + *consumed;
1736 void __user *end = buffer + size;
1737
1738 while (ptr < end && thread->return_error == BR_OK) {
1739 if (get_user(cmd, (uint32_t __user *)ptr))
1740 return -EFAULT;
1741 ptr += sizeof(uint32_t);
975a1ac9 1742 trace_binder_command(cmd);
355b0502
GKH		 1743 if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) {
1744 binder_stats.bc[_IOC_NR(cmd)]++;
1745 proc->stats.bc[_IOC_NR(cmd)]++;
1746 thread->stats.bc[_IOC_NR(cmd)]++;
1747 }
1748 switch (cmd) {
1749 case BC_INCREFS:
1750 case BC_ACQUIRE:
1751 case BC_RELEASE:
1752 case BC_DECREFS: {
1753 uint32_t target;
1754 struct binder_ref *ref;
1755 const char *debug_string;
1756
1757 if (get_user(target, (uint32_t __user *)ptr))
1758 return -EFAULT;
1759 ptr += sizeof(uint32_t);
1760 if (target == 0 && binder_context_mgr_node &&
1761 (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) {
1762 ref = binder_get_ref_for_node(proc,
1763 binder_context_mgr_node);
1764 if (ref->desc != target) {
56b468fc 1765 binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n",
355b0502
GKH		 1766 proc->pid, thread->pid,
1767 ref->desc);
1768 }
1769 } else
1770 ref = binder_get_ref(proc, target);
1771 if (ref == NULL) {
56b468fc 1772 binder_user_error("%d:%d refcount change on invalid ref %d\n",
355b0502
GKH		 1773 proc->pid, thread->pid, target);
1774 break;
1775 }
1776 switch (cmd) {
1777 case BC_INCREFS:
1778 debug_string = "IncRefs";
1779 binder_inc_ref(ref, 0, NULL);
1780 break;
1781 case BC_ACQUIRE:
1782 debug_string = "Acquire";
1783 binder_inc_ref(ref, 1, NULL);
1784 break;
1785 case BC_RELEASE:
1786 debug_string = "Release";
1787 binder_dec_ref(ref, 1);
1788 break;
1789 case BC_DECREFS:
1790 default:
1791 debug_string = "DecRefs";
1792 binder_dec_ref(ref, 0);
1793 break;
1794 }
1795 binder_debug(BINDER_DEBUG_USER_REFS,
56b468fc 1796 "%d:%d %s ref %d desc %d s %d w %d for node %d\n",
355b0502
GKH		 1797 proc->pid, thread->pid, debug_string, ref->debug_id,
1798 ref->desc, ref->strong, ref->weak, ref->node->debug_id);
1799 break;
1800 }
1801 case BC_INCREFS_DONE:
1802 case BC_ACQUIRE_DONE: {
da49889d
AH		 1803 binder_uintptr_t node_ptr;
1804 binder_uintptr_t cookie;
355b0502
GKH		 1805 struct binder_node *node;
1806
da49889d 1807 if (get_user(node_ptr, (binder_uintptr_t __user *)ptr))
355b0502 1808 return -EFAULT;
da49889d
AH		 1809 ptr += sizeof(binder_uintptr_t);
1810 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
355b0502 1811 return -EFAULT;
da49889d 1812 ptr += sizeof(binder_uintptr_t);
355b0502
GKH		 1813 node = binder_get_node(proc, node_ptr);
1814 if (node == NULL) {
da49889d 1815 binder_user_error("%d:%d %s u%016llx no match\n",
355b0502
GKH		 1816 proc->pid, thread->pid,
1817 cmd == BC_INCREFS_DONE ?
1818 "BC_INCREFS_DONE" :
1819 "BC_ACQUIRE_DONE",
da49889d 1820 (u64)node_ptr);
355b0502
GKH		 1821 break;
1822 }
1823 if (cookie != node->cookie) {
da49889d 1824 binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n",
355b0502
GKH		 1825 proc->pid, thread->pid,
1826 cmd == BC_INCREFS_DONE ?
1827 "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
da49889d
AH		 1828 (u64)node_ptr, node->debug_id,
1829 (u64)cookie, (u64)node->cookie);
355b0502
GKH		 1830 break;
1831 }
1832 if (cmd == BC_ACQUIRE_DONE) {
1833 if (node->pending_strong_ref == 0) {
56b468fc 1834 binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n",
355b0502
GKH		 1835 proc->pid, thread->pid,
1836 node->debug_id);
1837 break;
1838 }
1839 node->pending_strong_ref = 0;
1840 } else {
1841 if (node->pending_weak_ref == 0) {
56b468fc 1842 binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n",
355b0502
GKH		 1843 proc->pid, thread->pid,
1844 node->debug_id);
1845 break;
1846 }
1847 node->pending_weak_ref = 0;
1848 }
1849 binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0);
1850 binder_debug(BINDER_DEBUG_USER_REFS,
56b468fc 1851 "%d:%d %s node %d ls %d lw %d\n",
355b0502
GKH		 1852 proc->pid, thread->pid,
1853 cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
1854 node->debug_id, node->local_strong_refs, node->local_weak_refs);
1855 break;
1856 }
1857 case BC_ATTEMPT_ACQUIRE:
56b468fc 1858 pr_err("BC_ATTEMPT_ACQUIRE not supported\n");
355b0502
GKH		 1859 return -EINVAL;
1860 case BC_ACQUIRE_RESULT:
56b468fc 1861 pr_err("BC_ACQUIRE_RESULT not supported\n");
355b0502
GKH		 1862 return -EINVAL;
1863
1864 case BC_FREE_BUFFER: {
da49889d 1865 binder_uintptr_t data_ptr;
355b0502
GKH		 1866 struct binder_buffer *buffer;
1867
da49889d 1868 if (get_user(data_ptr, (binder_uintptr_t __user *)ptr))
355b0502 1869 return -EFAULT;
da49889d 1870 ptr += sizeof(binder_uintptr_t);
355b0502
GKH		 1871
1872 buffer = binder_buffer_lookup(proc, data_ptr);
1873 if (buffer == NULL) {
da49889d
AH		 1874 binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n",
1875 proc->pid, thread->pid, (u64)data_ptr);
355b0502
GKH		 1876 break;
1877 }
1878 if (!buffer->allow_user_free) {
da49889d
AH		 1879 binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n",
1880 proc->pid, thread->pid, (u64)data_ptr);
355b0502
GKH		 1881 break;
1882 }
1883 binder_debug(BINDER_DEBUG_FREE_BUFFER,
da49889d
AH		 1884 "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n",
1885 proc->pid, thread->pid, (u64)data_ptr,
1886 buffer->debug_id,
355b0502
GKH		 1887 buffer->transaction ? "active" : "finished");
1888
1889 if (buffer->transaction) {
1890 buffer->transaction->buffer = NULL;
1891 buffer->transaction = NULL;
1892 }
1893 if (buffer->async_transaction && buffer->target_node) {
1894 BUG_ON(!buffer->target_node->has_async_transaction);
1895 if (list_empty(&buffer->target_node->async_todo))
1896 buffer->target_node->has_async_transaction = 0;
1897 else
1898 list_move_tail(buffer->target_node->async_todo.next, &thread->todo);
1899 }
975a1ac9 1900 trace_binder_transaction_buffer_release(buffer);
355b0502
GKH		 1901 binder_transaction_buffer_release(proc, buffer, NULL);
1902 binder_free_buf(proc, buffer);
1903 break;
1904 }
1905
1906 case BC_TRANSACTION:
1907 case BC_REPLY: {
1908 struct binder_transaction_data tr;
1909
1910 if (copy_from_user(&tr, ptr, sizeof(tr)))
1911 return -EFAULT;
1912 ptr += sizeof(tr);
1913 binder_transaction(proc, thread, &tr, cmd == BC_REPLY);
1914 break;
1915 }
1916
1917 case BC_REGISTER_LOOPER:
1918 binder_debug(BINDER_DEBUG_THREADS,
56b468fc 1919 "%d:%d BC_REGISTER_LOOPER\n",
355b0502
GKH		 1920 proc->pid, thread->pid);
1921 if (thread->looper & BINDER_LOOPER_STATE_ENTERED) {
1922 thread->looper |= BINDER_LOOPER_STATE_INVALID;
56b468fc 1923 binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n",
355b0502
GKH		 1924 proc->pid, thread->pid);
1925 } else if (proc->requested_threads == 0) {
1926 thread->looper |= BINDER_LOOPER_STATE_INVALID;
56b468fc 1927 binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n",
355b0502
GKH		 1928 proc->pid, thread->pid);
1929 } else {
1930 proc->requested_threads--;
1931 proc->requested_threads_started++;
1932 }
1933 thread->looper |= BINDER_LOOPER_STATE_REGISTERED;
1934 break;
1935 case BC_ENTER_LOOPER:
1936 binder_debug(BINDER_DEBUG_THREADS,
56b468fc 1937 "%d:%d BC_ENTER_LOOPER\n",
355b0502
GKH		 1938 proc->pid, thread->pid);
1939 if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) {
1940 thread->looper |= BINDER_LOOPER_STATE_INVALID;
56b468fc 1941 binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n",
355b0502
GKH		 1942 proc->pid, thread->pid);
1943 }
1944 thread->looper |= BINDER_LOOPER_STATE_ENTERED;
1945 break;
1946 case BC_EXIT_LOOPER:
1947 binder_debug(BINDER_DEBUG_THREADS,
56b468fc 1948 "%d:%d BC_EXIT_LOOPER\n",
355b0502
GKH		 1949 proc->pid, thread->pid);
1950 thread->looper |= BINDER_LOOPER_STATE_EXITED;
1951 break;
1952
1953 case BC_REQUEST_DEATH_NOTIFICATION:
1954 case BC_CLEAR_DEATH_NOTIFICATION: {
1955 uint32_t target;
da49889d 1956 binder_uintptr_t cookie;
355b0502
GKH		 1957 struct binder_ref *ref;
1958 struct binder_ref_death *death;
1959
1960 if (get_user(target, (uint32_t __user *)ptr))
1961 return -EFAULT;
1962 ptr += sizeof(uint32_t);
da49889d 1963 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
355b0502 1964 return -EFAULT;
da49889d 1965 ptr += sizeof(binder_uintptr_t);
355b0502
GKH		 1966 ref = binder_get_ref(proc, target);
1967 if (ref == NULL) {
56b468fc 1968 binder_user_error("%d:%d %s invalid ref %d\n",
355b0502
GKH		 1969 proc->pid, thread->pid,
1970 cmd == BC_REQUEST_DEATH_NOTIFICATION ?
1971 "BC_REQUEST_DEATH_NOTIFICATION" :
1972 "BC_CLEAR_DEATH_NOTIFICATION",
1973 target);
1974 break;
1975 }
1976
1977 binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
da49889d 1978 "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n",
355b0502
GKH		 1979 proc->pid, thread->pid,
1980 cmd == BC_REQUEST_DEATH_NOTIFICATION ?
1981 "BC_REQUEST_DEATH_NOTIFICATION" :
1982 "BC_CLEAR_DEATH_NOTIFICATION",
da49889d 1983 (u64)cookie, ref->debug_id, ref->desc,
355b0502
GKH		 1984 ref->strong, ref->weak, ref->node->debug_id);
1985
1986 if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
1987 if (ref->death) {
56b468fc 1988 binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n",
355b0502
GKH		 1989 proc->pid, thread->pid);
1990 break;
1991 }
1992 death = kzalloc(sizeof(*death), GFP_KERNEL);
1993 if (death == NULL) {
1994 thread->return_error = BR_ERROR;
1995 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
56b468fc 1996 "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n",
355b0502
GKH		 1997 proc->pid, thread->pid);
1998 break;
1999 }
2000 binder_stats_created(BINDER_STAT_DEATH);
2001 INIT_LIST_HEAD(&death->work.entry);
2002 death->cookie = cookie;
2003 ref->death = death;
2004 if (ref->node->proc == NULL) {
2005 ref->death->work.type = BINDER_WORK_DEAD_BINDER;
2006 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2007 list_add_tail(&ref->death->work.entry, &thread->todo);
2008 } else {
2009 list_add_tail(&ref->death->work.entry, &proc->todo);
2010 wake_up_interruptible(&proc->wait);
2011 }
2012 }
2013 } else {
2014 if (ref->death == NULL) {
56b468fc 2015 binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n",
355b0502
GKH		 2016 proc->pid, thread->pid);
2017 break;
2018 }
2019 death = ref->death;
2020 if (death->cookie != cookie) {
da49889d 2021 binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n",
355b0502 2022 proc->pid, thread->pid,
da49889d
AH		 2023 (u64)death->cookie,
2024 (u64)cookie);
355b0502
GKH		 2025 break;
2026 }
2027 ref->death = NULL;
2028 if (list_empty(&death->work.entry)) {
2029 death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
2030 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2031 list_add_tail(&death->work.entry, &thread->todo);
2032 } else {
2033 list_add_tail(&death->work.entry, &proc->todo);
2034 wake_up_interruptible(&proc->wait);
2035 }
2036 } else {
2037 BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
2038 death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
2039 }
2040 }
2041 } break;
2042 case BC_DEAD_BINDER_DONE: {
2043 struct binder_work *w;
da49889d 2044 binder_uintptr_t cookie;
355b0502 2045 struct binder_ref_death *death = NULL;
10f62861 2046
da49889d 2047 if (get_user(cookie, (binder_uintptr_t __user *)ptr))
355b0502
GKH		 2048 return -EFAULT;
2049
2050 ptr += sizeof(void *);
2051 list_for_each_entry(w, &proc->delivered_death, entry) {
2052 struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);
10f62861 2053
355b0502
GKH		 2054 if (tmp_death->cookie == cookie) {
2055 death = tmp_death;
2056 break;
2057 }
2058 }
2059 binder_debug(BINDER_DEBUG_DEAD_BINDER,
da49889d
AH		 2060 "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n",
2061 proc->pid, thread->pid, (u64)cookie,
2062 death);
355b0502 2063 if (death == NULL) {
da49889d
AH		 2064 binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n",
2065 proc->pid, thread->pid, (u64)cookie);
355b0502
GKH		 2066 break;
2067 }
2068
2069 list_del_init(&death->work.entry);
2070 if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
2071 death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
2072 if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
2073 list_add_tail(&death->work.entry, &thread->todo);
2074 } else {
2075 list_add_tail(&death->work.entry, &proc->todo);
2076 wake_up_interruptible(&proc->wait);
2077 }
2078 }
2079 } break;
2080
2081 default:
56b468fc 2082 pr_err("%d:%d unknown command %d\n",
355b0502
GKH		 2083 proc->pid, thread->pid, cmd);
2084 return -EINVAL;
2085 }
2086 *consumed = ptr - buffer;
2087 }
2088 return 0;
2089}
2090
fb07ebc3
BP		 2091static void binder_stat_br(struct binder_proc *proc,
2092 struct binder_thread *thread, uint32_t cmd)
355b0502 2093{
975a1ac9 2094 trace_binder_return(cmd);
355b0502
GKH		 2095 if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) {
2096 binder_stats.br[_IOC_NR(cmd)]++;
2097 proc->stats.br[_IOC_NR(cmd)]++;
2098 thread->stats.br[_IOC_NR(cmd)]++;
2099 }
2100}
2101
2102static int binder_has_proc_work(struct binder_proc *proc,
2103 struct binder_thread *thread)
2104{
2105 return !list_empty(&proc->todo) ||
2106 (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
2107}
2108
2109static int binder_has_thread_work(struct binder_thread *thread)
2110{
2111 return !list_empty(&thread->todo) || thread->return_error != BR_OK ||
2112 (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
2113}
2114
2115static int binder_thread_read(struct binder_proc *proc,
2116 struct binder_thread *thread,
da49889d
AH		 2117 binder_uintptr_t binder_buffer, size_t size,
2118 binder_size_t *consumed, int non_block)
355b0502 2119{
da49889d 2120 void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
355b0502
GKH		 2121 void __user *ptr = buffer + *consumed;
2122 void __user *end = buffer + size;
2123
2124 int ret = 0;
2125 int wait_for_proc_work;
2126
2127 if (*consumed == 0) {
2128 if (put_user(BR_NOOP, (uint32_t __user *)ptr))
2129 return -EFAULT;
2130 ptr += sizeof(uint32_t);
2131 }
2132
2133retry:
2134 wait_for_proc_work = thread->transaction_stack == NULL &&
2135 list_empty(&thread->todo);
2136
2137 if (thread->return_error != BR_OK && ptr < end) {
2138 if (thread->return_error2 != BR_OK) {
2139 if (put_user(thread->return_error2, (uint32_t __user *)ptr))
2140 return -EFAULT;
2141 ptr += sizeof(uint32_t);
89334ab4 2142 binder_stat_br(proc, thread, thread->return_error2);
355b0502
GKH		 2143 if (ptr == end)
2144 goto done;
2145 thread->return_error2 = BR_OK;
2146 }
2147 if (put_user(thread->return_error, (uint32_t __user *)ptr))
2148 return -EFAULT;
2149 ptr += sizeof(uint32_t);
89334ab4 2150 binder_stat_br(proc, thread, thread->return_error);
355b0502
GKH		 2151 thread->return_error = BR_OK;
2152 goto done;
2153 }
2154
2155
2156 thread->looper |= BINDER_LOOPER_STATE_WAITING;
2157 if (wait_for_proc_work)
2158 proc->ready_threads++;
975a1ac9
AH		 2159
2160 binder_unlock(__func__);
2161
2162 trace_binder_wait_for_work(wait_for_proc_work,
2163 !!thread->transaction_stack,
2164 !list_empty(&thread->todo));
355b0502
GKH		 2165 if (wait_for_proc_work) {
2166 if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
2167 BINDER_LOOPER_STATE_ENTERED))) {
56b468fc 2168 binder_user_error("%d:%d ERROR: Thread waiting for process work before calling BC_REGISTER_LOOPER or BC_ENTER_LOOPER (state %x)\n",
355b0502
GKH		 2169 proc->pid, thread->pid, thread->looper);
2170 wait_event_interruptible(binder_user_error_wait,
2171 binder_stop_on_user_error < 2);
2172 }
2173 binder_set_nice(proc->default_priority);
2174 if (non_block) {
2175 if (!binder_has_proc_work(proc, thread))
2176 ret = -EAGAIN;
2177 } else
e2610b26 2178 ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread));
355b0502
GKH		 2179 } else {
2180 if (non_block) {
2181 if (!binder_has_thread_work(thread))
2182 ret = -EAGAIN;
2183 } else
e2610b26 2184 ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread));
355b0502 2185 }
975a1ac9
AH		 2186
2187 binder_lock(__func__);
2188
355b0502
GKH		 2189 if (wait_for_proc_work)
2190 proc->ready_threads--;
2191 thread->looper &= ~BINDER_LOOPER_STATE_WAITING;
2192
2193 if (ret)
2194 return ret;
2195
2196 while (1) {
2197 uint32_t cmd;
2198 struct binder_transaction_data tr;
2199 struct binder_work *w;
2200 struct binder_transaction *t = NULL;
2201
2202 if (!list_empty(&thread->todo))
2203 w = list_first_entry(&thread->todo, struct binder_work, entry);
2204 else if (!list_empty(&proc->todo) && wait_for_proc_work)
2205 w = list_first_entry(&proc->todo, struct binder_work, entry);
2206 else {
2207 if (ptr - buffer == 4 && !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) /* no data added */
2208 goto retry;
2209 break;
2210 }
2211
2212 if (end - ptr < sizeof(tr) + 4)
2213 break;
2214
2215 switch (w->type) {
2216 case BINDER_WORK_TRANSACTION: {
2217 t = container_of(w, struct binder_transaction, work);
2218 } break;
2219 case BINDER_WORK_TRANSACTION_COMPLETE: {
2220 cmd = BR_TRANSACTION_COMPLETE;
2221 if (put_user(cmd, (uint32_t __user *)ptr))
2222 return -EFAULT;
2223 ptr += sizeof(uint32_t);
2224
2225 binder_stat_br(proc, thread, cmd);
2226 binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE,
56b468fc 2227 "%d:%d BR_TRANSACTION_COMPLETE\n",
355b0502
GKH		 2228 proc->pid, thread->pid);
2229
2230 list_del(&w->entry);
2231 kfree(w);
2232 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
2233 } break;
2234 case BINDER_WORK_NODE: {
2235 struct binder_node *node = container_of(w, struct binder_node, work);
2236 uint32_t cmd = BR_NOOP;
2237 const char *cmd_name;
2238 int strong = node->internal_strong_refs || node->local_strong_refs;
2239 int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong;
10f62861 2240
355b0502
GKH		 2241 if (weak && !node->has_weak_ref) {
2242 cmd = BR_INCREFS;
2243 cmd_name = "BR_INCREFS";
2244 node->has_weak_ref = 1;
2245 node->pending_weak_ref = 1;
2246 node->local_weak_refs++;
2247 } else if (strong && !node->has_strong_ref) {
2248 cmd = BR_ACQUIRE;
2249 cmd_name = "BR_ACQUIRE";
2250 node->has_strong_ref = 1;
2251 node->pending_strong_ref = 1;
2252 node->local_strong_refs++;
2253 } else if (!strong && node->has_strong_ref) {
2254 cmd = BR_RELEASE;
2255 cmd_name = "BR_RELEASE";
2256 node->has_strong_ref = 0;
2257 } else if (!weak && node->has_weak_ref) {
2258 cmd = BR_DECREFS;
2259 cmd_name = "BR_DECREFS";
2260 node->has_weak_ref = 0;
2261 }
2262 if (cmd != BR_NOOP) {
2263 if (put_user(cmd, (uint32_t __user *)ptr))
2264 return -EFAULT;
2265 ptr += sizeof(uint32_t);
da49889d
AH		 2266 if (put_user(node->ptr,
2267 (binder_uintptr_t __user *)ptr))
355b0502 2268 return -EFAULT;
da49889d
AH		 2269 ptr += sizeof(binder_uintptr_t);
2270 if (put_user(node->cookie,
2271 (binder_uintptr_t __user *)ptr))
355b0502 2272 return -EFAULT;
da49889d 2273 ptr += sizeof(binder_uintptr_t);
355b0502
GKH		 2274
2275 binder_stat_br(proc, thread, cmd);
2276 binder_debug(BINDER_DEBUG_USER_REFS,
da49889d
AH		 2277 "%d:%d %s %d u%016llx c%016llx\n",
2278 proc->pid, thread->pid, cmd_name,
2279 node->debug_id,
2280 (u64)node->ptr, (u64)node->cookie);
355b0502
GKH		 2281 } else {
2282 list_del_init(&w->entry);
2283 if (!weak && !strong) {
2284 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
da49889d
AH		 2285 "%d:%d node %d u%016llx c%016llx deleted\n",
2286 proc->pid, thread->pid,
2287 node->debug_id,
2288 (u64)node->ptr,
2289 (u64)node->cookie);
355b0502
GKH		 2290 rb_erase(&node->rb_node, &proc->nodes);
2291 kfree(node);
2292 binder_stats_deleted(BINDER_STAT_NODE);
2293 } else {
2294 binder_debug(BINDER_DEBUG_INTERNAL_REFS,
da49889d
AH		 2295 "%d:%d node %d u%016llx c%016llx state unchanged\n",
2296 proc->pid, thread->pid,
2297 node->debug_id,
2298 (u64)node->ptr,
2299 (u64)node->cookie);
355b0502
GKH		 2300 }
2301 }
2302 } break;
2303 case BINDER_WORK_DEAD_BINDER:
2304 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
2305 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
2306 struct binder_ref_death *death;
2307 uint32_t cmd;
2308
2309 death = container_of(w, struct binder_ref_death, work);
2310 if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
2311 cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
2312 else
2313 cmd = BR_DEAD_BINDER;
2314 if (put_user(cmd, (uint32_t __user *)ptr))
2315 return -EFAULT;
2316 ptr += sizeof(uint32_t);
da49889d
AH		 2317 if (put_user(death->cookie,
2318 (binder_uintptr_t __user *)ptr))
355b0502 2319 return -EFAULT;
da49889d 2320 ptr += sizeof(binder_uintptr_t);
89334ab4 2321 binder_stat_br(proc, thread, cmd);
355b0502 2322 binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
da49889d 2323 "%d:%d %s %016llx\n",
355b0502
GKH		 2324 proc->pid, thread->pid,
2325 cmd == BR_DEAD_BINDER ?
2326 "BR_DEAD_BINDER" :
2327 "BR_CLEAR_DEATH_NOTIFICATION_DONE",
da49889d 2328 (u64)death->cookie);
355b0502
GKH		 2329
2330 if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
2331 list_del(&w->entry);
2332 kfree(death);
2333 binder_stats_deleted(BINDER_STAT_DEATH);
2334 } else
2335 list_move(&w->entry, &proc->delivered_death);
2336 if (cmd == BR_DEAD_BINDER)
2337 goto done; /* DEAD_BINDER notifications can cause transactions */
2338 } break;
2339 }
2340
2341 if (!t)
2342 continue;
2343
2344 BUG_ON(t->buffer == NULL);
2345 if (t->buffer->target_node) {
2346 struct binder_node *target_node = t->buffer->target_node;
10f62861 2347
355b0502
GKH		 2348 tr.target.ptr = target_node->ptr;
2349 tr.cookie = target_node->cookie;
2350 t->saved_priority = task_nice(current);
2351 if (t->priority < target_node->min_priority &&
2352 !(t->flags & TF_ONE_WAY))
2353 binder_set_nice(t->priority);
2354 else if (!(t->flags & TF_ONE_WAY) ||
2355 t->saved_priority > target_node->min_priority)
2356 binder_set_nice(target_node->min_priority);
2357 cmd = BR_TRANSACTION;
2358 } else {
da49889d
AH		 2359 tr.target.ptr = 0;
2360 tr.cookie = 0;
355b0502
GKH		 2361 cmd = BR_REPLY;
2362 }
2363 tr.code = t->code;
2364 tr.flags = t->flags;
4a2ebb93 2365 tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid);
355b0502
GKH		 2366
2367 if (t->from) {
2368 struct task_struct *sender = t->from->proc->tsk;
10f62861 2369
355b0502 2370 tr.sender_pid = task_tgid_nr_ns(sender,
17cf22c3 2371 task_active_pid_ns(current));
355b0502
GKH		 2372 } else {
2373 tr.sender_pid = 0;
2374 }
2375
2376 tr.data_size = t->buffer->data_size;
2377 tr.offsets_size = t->buffer->offsets_size;
da49889d
AH		 2378 tr.data.ptr.buffer = (binder_uintptr_t)(
2379 (uintptr_t)t->buffer->data +
2380 proc->user_buffer_offset);
355b0502
GKH		 2381 tr.data.ptr.offsets = tr.data.ptr.buffer +
2382 ALIGN(t->buffer->data_size,
2383 sizeof(void *));
2384
2385 if (put_user(cmd, (uint32_t __user *)ptr))
2386 return -EFAULT;
2387 ptr += sizeof(uint32_t);
2388 if (copy_to_user(ptr, &tr, sizeof(tr)))
2389 return -EFAULT;
2390 ptr += sizeof(tr);
2391
975a1ac9 2392 trace_binder_transaction_received(t);
355b0502
GKH		 2393 binder_stat_br(proc, thread, cmd);
2394 binder_debug(BINDER_DEBUG_TRANSACTION,
da49889d 2395 "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n",
355b0502
GKH		 2396 proc->pid, thread->pid,
2397 (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
2398 "BR_REPLY",
2399 t->debug_id, t->from ? t->from->proc->pid : 0,
2400 t->from ? t->from->pid : 0, cmd,
2401 t->buffer->data_size, t->buffer->offsets_size,
da49889d 2402 (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets);
355b0502
GKH		 2403
2404 list_del(&t->work.entry);
2405 t->buffer->allow_user_free = 1;
2406 if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
2407 t->to_parent = thread->transaction_stack;
2408 t->to_thread = thread;
2409 thread->transaction_stack = t;
2410 } else {
2411 t->buffer->transaction = NULL;
2412 kfree(t);
2413 binder_stats_deleted(BINDER_STAT_TRANSACTION);
2414 }
2415 break;
2416 }
2417
2418done:
2419
2420 *consumed = ptr - buffer;
2421 if (proc->requested_threads + proc->ready_threads == 0 &&
2422 proc->requested_threads_started < proc->max_threads &&
2423 (thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
2424 BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
2425 /*spawn a new thread if we leave this out */) {
2426 proc->requested_threads++;
2427 binder_debug(BINDER_DEBUG_THREADS,
56b468fc 2428 "%d:%d BR_SPAWN_LOOPER\n",
355b0502
GKH		 2429 proc->pid, thread->pid);
2430 if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer))
2431 return -EFAULT;
89334ab4 2432 binder_stat_br(proc, thread, BR_SPAWN_LOOPER);
355b0502
GKH		 2433 }
2434 return 0;
2435}
2436
2437static void binder_release_work(struct list_head *list)
2438{
2439 struct binder_work *w;
10f62861 2440
355b0502
GKH		 2441 while (!list_empty(list)) {
2442 w = list_first_entry(list, struct binder_work, entry);
2443 list_del_init(&w->entry);
2444 switch (w->type) {
2445 case BINDER_WORK_TRANSACTION: {
2446 struct binder_transaction *t;
2447
2448 t = container_of(w, struct binder_transaction, work);
675d66b0
AH		 2449 if (t->buffer->target_node &&
2450 !(t->flags & TF_ONE_WAY)) {
355b0502 2451 binder_send_failed_reply(t, BR_DEAD_REPLY);
675d66b0
AH		 2452 } else {
2453 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
56b468fc 2454 "undelivered transaction %d\n",
675d66b0
AH		 2455 t->debug_id);
2456 t->buffer->transaction = NULL;
2457 kfree(t);
2458 binder_stats_deleted(BINDER_STAT_TRANSACTION);
2459 }
355b0502
GKH		 2460 } break;
2461 case BINDER_WORK_TRANSACTION_COMPLETE: {
675d66b0 2462 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
56b468fc 2463 "undelivered TRANSACTION_COMPLETE\n");
355b0502
GKH		 2464 kfree(w);
2465 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
2466 } break;
675d66b0
AH		 2467 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
2468 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
2469 struct binder_ref_death *death;
2470
2471 death = container_of(w, struct binder_ref_death, work);
2472 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
da49889d
AH		 2473 "undelivered death notification, %016llx\n",
2474 (u64)death->cookie);
675d66b0
AH		 2475 kfree(death);
2476 binder_stats_deleted(BINDER_STAT_DEATH);
2477 } break;
355b0502 2478 default:
56b468fc 2479 pr_err("unexpected work type, %d, not freed\n",
675d66b0 2480 w->type);
355b0502
GKH		 2481 break;
2482 }
2483 }
2484
2485}
2486
2487static struct binder_thread *binder_get_thread(struct binder_proc *proc)
2488{
2489 struct binder_thread *thread = NULL;
2490 struct rb_node *parent = NULL;
2491 struct rb_node **p = &proc->threads.rb_node;
2492
2493 while (*p) {
2494 parent = *p;
2495 thread = rb_entry(parent, struct binder_thread, rb_node);
2496
2497 if (current->pid < thread->pid)
2498 p = &(*p)->rb_left;
2499 else if (current->pid > thread->pid)
2500 p = &(*p)->rb_right;
2501 else
2502 break;
2503 }
2504 if (*p == NULL) {
2505 thread = kzalloc(sizeof(*thread), GFP_KERNEL);
2506 if (thread == NULL)
2507 return NULL;
2508 binder_stats_created(BINDER_STAT_THREAD);
2509 thread->proc = proc;
2510 thread->pid = current->pid;
2511 init_waitqueue_head(&thread->wait);
2512 INIT_LIST_HEAD(&thread->todo);
2513 rb_link_node(&thread->rb_node, parent, p);
2514 rb_insert_color(&thread->rb_node, &proc->threads);
2515 thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
2516 thread->return_error = BR_OK;
2517 thread->return_error2 = BR_OK;
2518 }
2519 return thread;
2520}
2521
2522static int binder_free_thread(struct binder_proc *proc,
2523 struct binder_thread *thread)
2524{
2525 struct binder_transaction *t;
2526 struct binder_transaction *send_reply = NULL;
2527 int active_transactions = 0;
2528
2529 rb_erase(&thread->rb_node, &proc->threads);
2530 t = thread->transaction_stack;
2531 if (t && t->to_thread == thread)
2532 send_reply = t;
2533 while (t) {
2534 active_transactions++;
2535 binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
56b468fc
AS		 2536 "release %d:%d transaction %d %s, still active\n",
2537 proc->pid, thread->pid,
355b0502
GKH		 2538 t->debug_id,
2539 (t->to_thread == thread) ? "in" : "out");
2540
2541 if (t->to_thread == thread) {
2542 t->to_proc = NULL;
2543 t->to_thread = NULL;
2544 if (t->buffer) {
2545 t->buffer->transaction = NULL;
2546 t->buffer = NULL;
2547 }
2548 t = t->to_parent;
2549 } else if (t->from == thread) {
2550 t->from = NULL;
2551 t = t->from_parent;
2552 } else
2553 BUG();
2554 }
2555 if (send_reply)
2556 binder_send_failed_reply(send_reply, BR_DEAD_REPLY);
2557 binder_release_work(&thread->todo);
2558 kfree(thread);
2559 binder_stats_deleted(BINDER_STAT_THREAD);
2560 return active_transactions;
2561}
2562
2563static unsigned int binder_poll(struct file *filp,
2564 struct poll_table_struct *wait)
2565{
2566 struct binder_proc *proc = filp->private_data;
2567 struct binder_thread *thread = NULL;
2568 int wait_for_proc_work;
2569
975a1ac9
AH		 2570 binder_lock(__func__);
2571
355b0502
GKH		 2572 thread = binder_get_thread(proc);
2573
2574 wait_for_proc_work = thread->transaction_stack == NULL &&
2575 list_empty(&thread->todo) && thread->return_error == BR_OK;
975a1ac9
AH		 2576
2577 binder_unlock(__func__);
355b0502
GKH		 2578
2579 if (wait_for_proc_work) {
2580 if (binder_has_proc_work(proc, thread))
2581 return POLLIN;
2582 poll_wait(filp, &proc->wait, wait);
2583 if (binder_has_proc_work(proc, thread))
2584 return POLLIN;
2585 } else {
2586 if (binder_has_thread_work(thread))
2587 return POLLIN;
2588 poll_wait(filp, &thread->wait, wait);
2589 if (binder_has_thread_work(thread))
2590 return POLLIN;
2591 }
2592 return 0;
2593}
2594
78260ac6
TR		 2595static int binder_ioctl_write_read(struct file *filp,
2596 unsigned int cmd, unsigned long arg,
2597 struct binder_thread *thread)
2598{
2599 int ret = 0;
2600 struct binder_proc *proc = filp->private_data;
2601 unsigned int size = _IOC_SIZE(cmd);
2602 void __user *ubuf = (void __user *)arg;
2603 struct binder_write_read bwr;
2604
2605 if (size != sizeof(struct binder_write_read)) {
2606 ret = -EINVAL;
2607 goto out;
2608 }
2609 if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
2610 ret = -EFAULT;
2611 goto out;
2612 }
2613 binder_debug(BINDER_DEBUG_READ_WRITE,
2614 "%d:%d write %lld at %016llx, read %lld at %016llx\n",
2615 proc->pid, thread->pid,
2616 (u64)bwr.write_size, (u64)bwr.write_buffer,
2617 (u64)bwr.read_size, (u64)bwr.read_buffer);
2618
2619 if (bwr.write_size > 0) {
2620 ret = binder_thread_write(proc, thread,
2621 bwr.write_buffer,
2622 bwr.write_size,
2623 &bwr.write_consumed);
2624 trace_binder_write_done(ret);
2625 if (ret < 0) {
2626 bwr.read_consumed = 0;
2627 if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
2628 ret = -EFAULT;
2629 goto out;
2630 }
2631 }
2632 if (bwr.read_size > 0) {
2633 ret = binder_thread_read(proc, thread, bwr.read_buffer,
2634 bwr.read_size,
2635 &bwr.read_consumed,
2636 filp->f_flags & O_NONBLOCK);
2637 trace_binder_read_done(ret);
2638 if (!list_empty(&proc->todo))
2639 wake_up_interruptible(&proc->wait);
2640 if (ret < 0) {
2641 if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
2642 ret = -EFAULT;
2643 goto out;
2644 }
2645 }
2646 binder_debug(BINDER_DEBUG_READ_WRITE,
2647 "%d:%d wrote %lld of %lld, read return %lld of %lld\n",
2648 proc->pid, thread->pid,
2649 (u64)bwr.write_consumed, (u64)bwr.write_size,
2650 (u64)bwr.read_consumed, (u64)bwr.read_size);
2651 if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
2652 ret = -EFAULT;
2653 goto out;
2654 }
2655out:
2656 return ret;
2657}
2658
2659static int binder_ioctl_set_ctx_mgr(struct file *filp)
2660{
2661 int ret = 0;
2662 struct binder_proc *proc = filp->private_data;
2663 kuid_t curr_euid = current_euid();
2664
2665 if (binder_context_mgr_node != NULL) {
2666 pr_err("BINDER_SET_CONTEXT_MGR already set\n");
2667 ret = -EBUSY;
2668 goto out;
2669 }
2670 if (uid_valid(binder_context_mgr_uid)) {
2671 if (!uid_eq(binder_context_mgr_uid, curr_euid)) {
2672 pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
2673 from_kuid(&init_user_ns, curr_euid),
2674 from_kuid(&init_user_ns,
2675 binder_context_mgr_uid));
2676 ret = -EPERM;
2677 goto out;
2678 }
2679 } else {
2680 binder_context_mgr_uid = curr_euid;
2681 }
2682 binder_context_mgr_node = binder_new_node(proc, 0, 0);
2683 if (binder_context_mgr_node == NULL) {
2684 ret = -ENOMEM;
2685 goto out;
2686 }
2687 binder_context_mgr_node->local_weak_refs++;
2688 binder_context_mgr_node->local_strong_refs++;
2689 binder_context_mgr_node->has_strong_ref = 1;
2690 binder_context_mgr_node->has_weak_ref = 1;
2691out:
2692 return ret;
2693}
2694
355b0502
GKH		 2695static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
2696{
2697 int ret;
2698 struct binder_proc *proc = filp->private_data;
2699 struct binder_thread *thread;
2700 unsigned int size = _IOC_SIZE(cmd);
2701 void __user *ubuf = (void __user *)arg;
2702
78260ac6
TR		 2703 /*pr_info("binder_ioctl: %d:%d %x %lx\n",
2704 proc->pid, current->pid, cmd, arg);*/
355b0502 2705
975a1ac9
AH		 2706 trace_binder_ioctl(cmd, arg);
2707
355b0502
GKH		 2708 ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
2709 if (ret)
975a1ac9 2710 goto err_unlocked;
355b0502 2711
975a1ac9 2712 binder_lock(__func__);
355b0502
GKH		 2713 thread = binder_get_thread(proc);
2714 if (thread == NULL) {
2715 ret = -ENOMEM;
2716 goto err;
2717 }
2718
2719 switch (cmd) {
78260ac6
TR		 2720 case BINDER_WRITE_READ:
2721 ret = binder_ioctl_write_read(filp, cmd, arg, thread);
2722 if (ret)
355b0502 2723 goto err;
355b0502 2724 break;
355b0502
GKH		 2725 case BINDER_SET_MAX_THREADS:
2726 if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
2727 ret = -EINVAL;
2728 goto err;
2729 }
2730 break;
2731 case BINDER_SET_CONTEXT_MGR:
78260ac6
TR		 2732 ret = binder_ioctl_set_ctx_mgr(filp);
2733 if (ret)
355b0502 2734 goto err;
355b0502
GKH		 2735 break;
2736 case BINDER_THREAD_EXIT:
56b468fc 2737 binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n",
355b0502
GKH		 2738 proc->pid, thread->pid);
2739 binder_free_thread(proc, thread);
2740 thread = NULL;
2741 break;
36c89c0a
MM		 2742 case BINDER_VERSION: {
2743 struct binder_version __user *ver = ubuf;
2744
355b0502
GKH		 2745 if (size != sizeof(struct binder_version)) {
2746 ret = -EINVAL;
2747 goto err;
2748 }
36c89c0a
MM		 2749 if (put_user(BINDER_CURRENT_PROTOCOL_VERSION,
2750 &ver->protocol_version)) {
355b0502
GKH		 2751 ret = -EINVAL;
2752 goto err;
2753 }
2754 break;
36c89c0a 2755 }
355b0502
GKH		 2756 default:
2757 ret = -EINVAL;
2758 goto err;
2759 }
2760 ret = 0;
2761err:
2762 if (thread)
2763 thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN;
975a1ac9 2764 binder_unlock(__func__);
355b0502
GKH		 2765 wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
2766 if (ret && ret != -ERESTARTSYS)
56b468fc 2767 pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret);
975a1ac9
AH		 2768err_unlocked:
2769 trace_binder_ioctl_done(ret);
355b0502
GKH		 2770 return ret;
2771}
2772
2773static void binder_vma_open(struct vm_area_struct *vma)
2774{
2775 struct binder_proc *proc = vma->vm_private_data;
10f62861 2776
355b0502 2777 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
56b468fc 2778 "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
355b0502
GKH		 2779 proc->pid, vma->vm_start, vma->vm_end,
2780 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2781 (unsigned long)pgprot_val(vma->vm_page_prot));
355b0502
GKH		 2782}
2783
2784static void binder_vma_close(struct vm_area_struct *vma)
2785{
2786 struct binder_proc *proc = vma->vm_private_data;
10f62861 2787
355b0502 2788 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
56b468fc 2789 "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
355b0502
GKH		 2790 proc->pid, vma->vm_start, vma->vm_end,
2791 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2792 (unsigned long)pgprot_val(vma->vm_page_prot));
2793 proc->vma = NULL;
2a90957f 2794 proc->vma_vm_mm = NULL;
355b0502
GKH		 2795 binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES);
2796}
2797
ddac7d5f
VM		 2798static int binder_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
2799{
2800 return VM_FAULT_SIGBUS;
2801}
2802
355b0502
GKH		 2803static struct vm_operations_struct binder_vm_ops = {
2804 .open = binder_vma_open,
2805 .close = binder_vma_close,
ddac7d5f 2806 .fault = binder_vm_fault,
355b0502
GKH		 2807};
2808
2809static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
2810{
2811 int ret;
2812 struct vm_struct *area;
2813 struct binder_proc *proc = filp->private_data;
2814 const char *failure_string;
2815 struct binder_buffer *buffer;
2816
a79f41ed
AV		 2817 if (proc->tsk != current)
2818 return -EINVAL;
2819
355b0502
GKH		 2820 if ((vma->vm_end - vma->vm_start) > SZ_4M)
2821 vma->vm_end = vma->vm_start + SZ_4M;
2822
2823 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2824 "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n",
2825 proc->pid, vma->vm_start, vma->vm_end,
2826 (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
2827 (unsigned long)pgprot_val(vma->vm_page_prot));
2828
2829 if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
2830 ret = -EPERM;
2831 failure_string = "bad vm_flags";
2832 goto err_bad_arg;
2833 }
2834 vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE;
2835
bd1eff97 2836 mutex_lock(&binder_mmap_lock);
355b0502
GKH		 2837 if (proc->buffer) {
2838 ret = -EBUSY;
2839 failure_string = "already mapped";
2840 goto err_already_mapped;
2841 }
2842
2843 area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP);
2844 if (area == NULL) {
2845 ret = -ENOMEM;
2846 failure_string = "get_vm_area";
2847 goto err_get_vm_area_failed;
2848 }
2849 proc->buffer = area->addr;
2850 proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer;
bd1eff97 2851 mutex_unlock(&binder_mmap_lock);
355b0502
GKH		 2852
2853#ifdef CONFIG_CPU_CACHE_VIPT
2854 if (cache_is_vipt_aliasing()) {
2855 while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) {
258767fe 2856 pr_info("binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);
355b0502
GKH		 2857 vma->vm_start += PAGE_SIZE;
2858 }
2859 }
2860#endif
2861 proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL);
2862 if (proc->pages == NULL) {
2863 ret = -ENOMEM;
2864 failure_string = "alloc page array";
2865 goto err_alloc_pages_failed;
2866 }
2867 proc->buffer_size = vma->vm_end - vma->vm_start;
2868
2869 vma->vm_ops = &binder_vm_ops;
2870 vma->vm_private_data = proc;
2871
2872 if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) {
2873 ret = -ENOMEM;
2874 failure_string = "alloc small buf";
2875 goto err_alloc_small_buf_failed;
2876 }
2877 buffer = proc->buffer;
2878 INIT_LIST_HEAD(&proc->buffers);
2879 list_add(&buffer->entry, &proc->buffers);
2880 buffer->free = 1;
2881 binder_insert_free_buffer(proc, buffer);
2882 proc->free_async_space = proc->buffer_size / 2;
2883 barrier();
a79f41ed 2884 proc->files = get_files_struct(current);
355b0502 2885 proc->vma = vma;
2a90957f 2886 proc->vma_vm_mm = vma->vm_mm;
355b0502 2887
258767fe 2888 /*pr_info("binder_mmap: %d %lx-%lx maps %p\n",
355b0502
GKH		 2889 proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/
2890 return 0;
2891
2892err_alloc_small_buf_failed:
2893 kfree(proc->pages);
2894 proc->pages = NULL;
2895err_alloc_pages_failed:
bd1eff97 2896 mutex_lock(&binder_mmap_lock);
355b0502
GKH		 2897 vfree(proc->buffer);
2898 proc->buffer = NULL;
2899err_get_vm_area_failed:
2900err_already_mapped:
bd1eff97 2901 mutex_unlock(&binder_mmap_lock);
355b0502 2902err_bad_arg:
258767fe 2903 pr_err("binder_mmap: %d %lx-%lx %s failed %d\n",
355b0502
GKH		 2904 proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
2905 return ret;
2906}
2907
2908static int binder_open(struct inode *nodp, struct file *filp)
2909{
2910 struct binder_proc *proc;
2911
2912 binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n",
2913 current->group_leader->pid, current->pid);
2914
2915 proc = kzalloc(sizeof(*proc), GFP_KERNEL);
2916 if (proc == NULL)
2917 return -ENOMEM;
2918 get_task_struct(current);
2919 proc->tsk = current;
2920 INIT_LIST_HEAD(&proc->todo);
2921 init_waitqueue_head(&proc->wait);
2922 proc->default_priority = task_nice(current);
975a1ac9
AH		 2923
2924 binder_lock(__func__);
2925
355b0502
GKH		 2926 binder_stats_created(BINDER_STAT_PROC);
2927 hlist_add_head(&proc->proc_node, &binder_procs);
2928 proc->pid = current->group_leader->pid;
2929 INIT_LIST_HEAD(&proc->delivered_death);
2930 filp->private_data = proc;
975a1ac9
AH		 2931
2932 binder_unlock(__func__);
355b0502 2933
16b66554 2934 if (binder_debugfs_dir_entry_proc) {
355b0502 2935 char strbuf[11];
10f62861 2936
355b0502 2937 snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
16b66554
AH		 2938 proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO,
2939 binder_debugfs_dir_entry_proc, proc, &binder_proc_fops);
355b0502
GKH		 2940 }
2941
2942 return 0;
2943}
2944
2945static int binder_flush(struct file *filp, fl_owner_t id)
2946{
2947 struct binder_proc *proc = filp->private_data;
2948
2949 binder_defer_work(proc, BINDER_DEFERRED_FLUSH);
2950
2951 return 0;
2952}
2953
2954static void binder_deferred_flush(struct binder_proc *proc)
2955{
2956 struct rb_node *n;
2957 int wake_count = 0;
10f62861 2958
355b0502
GKH		 2959 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
2960 struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
10f62861 2961
355b0502
GKH		 2962 thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
2963 if (thread->looper & BINDER_LOOPER_STATE_WAITING) {
2964 wake_up_interruptible(&thread->wait);
2965 wake_count++;
2966 }
2967 }
2968 wake_up_interruptible_all(&proc->wait);
2969
2970 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
2971 "binder_flush: %d woke %d threads\n", proc->pid,
2972 wake_count);
2973}
2974
2975static int binder_release(struct inode *nodp, struct file *filp)
2976{
2977 struct binder_proc *proc = filp->private_data;
10f62861 2978
16b66554 2979 debugfs_remove(proc->debugfs_entry);
355b0502
GKH		 2980 binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
2981
2982 return 0;
2983}
2984
008fa749
ME		 2985static int binder_node_release(struct binder_node *node, int refs)
2986{
2987 struct binder_ref *ref;
2988 int death = 0;
2989
2990 list_del_init(&node->work.entry);
2991 binder_release_work(&node->async_todo);
2992
2993 if (hlist_empty(&node->refs)) {
2994 kfree(node);
2995 binder_stats_deleted(BINDER_STAT_NODE);
2996
2997 return refs;
2998 }
2999
3000 node->proc = NULL;
3001 node->local_strong_refs = 0;
3002 node->local_weak_refs = 0;
3003 hlist_add_head(&node->dead_node, &binder_dead_nodes);
3004
3005 hlist_for_each_entry(ref, &node->refs, node_entry) {
3006 refs++;
3007
3008 if (!ref->death)
e194fd8a 3009 continue;
008fa749
ME		 3010
3011 death++;
3012
3013 if (list_empty(&ref->death->work.entry)) {
3014 ref->death->work.type = BINDER_WORK_DEAD_BINDER;
3015 list_add_tail(&ref->death->work.entry,
3016 &ref->proc->todo);
3017 wake_up_interruptible(&ref->proc->wait);
3018 } else
3019 BUG();
3020 }
3021
008fa749
ME		 3022 binder_debug(BINDER_DEBUG_DEAD_BINDER,
3023 "node %d now dead, refs %d, death %d\n",
3024 node->debug_id, refs, death);
3025
3026 return refs;
3027}
3028
355b0502
GKH		 3029static void binder_deferred_release(struct binder_proc *proc)
3030{
355b0502
GKH		 3031 struct binder_transaction *t;
3032 struct rb_node *n;
53413e7d
ME		 3033 int threads, nodes, incoming_refs, outgoing_refs, buffers,
3034 active_transactions, page_count;
355b0502
GKH		 3035
3036 BUG_ON(proc->vma);
3037 BUG_ON(proc->files);
3038
3039 hlist_del(&proc->proc_node);
53413e7d 3040
355b0502
GKH		 3041 if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
3042 binder_debug(BINDER_DEBUG_DEAD_BINDER,
c07c933f
ME		 3043 "%s: %d context_mgr_node gone\n",
3044 __func__, proc->pid);
355b0502
GKH		 3045 binder_context_mgr_node = NULL;
3046 }
3047
3048 threads = 0;
3049 active_transactions = 0;
3050 while ((n = rb_first(&proc->threads))) {
53413e7d
ME		 3051 struct binder_thread *thread;
3052
3053 thread = rb_entry(n, struct binder_thread, rb_node);
355b0502
GKH		 3054 threads++;
3055 active_transactions += binder_free_thread(proc, thread);
3056 }
53413e7d 3057
355b0502
GKH		 3058 nodes = 0;
3059 incoming_refs = 0;
3060 while ((n = rb_first(&proc->nodes))) {
53413e7d 3061 struct binder_node *node;
355b0502 3062
53413e7d 3063 node = rb_entry(n, struct binder_node, rb_node);
355b0502
GKH		 3064 nodes++;
3065 rb_erase(&node->rb_node, &proc->nodes);
008fa749 3066 incoming_refs = binder_node_release(node, incoming_refs);
355b0502 3067 }
53413e7d 3068
355b0502
GKH		 3069 outgoing_refs = 0;
3070 while ((n = rb_first(&proc->refs_by_desc))) {
53413e7d
ME		 3071 struct binder_ref *ref;
3072
3073 ref = rb_entry(n, struct binder_ref, rb_node_desc);
355b0502
GKH		 3074 outgoing_refs++;
3075 binder_delete_ref(ref);
3076 }
53413e7d 3077
355b0502 3078 binder_release_work(&proc->todo);
675d66b0 3079 binder_release_work(&proc->delivered_death);
355b0502 3080
53413e7d 3081 buffers = 0;
355b0502 3082 while ((n = rb_first(&proc->allocated_buffers))) {
53413e7d
ME		 3083 struct binder_buffer *buffer;
3084
3085 buffer = rb_entry(n, struct binder_buffer, rb_node);
3086
355b0502
GKH		 3087 t = buffer->transaction;
3088 if (t) {
3089 t->buffer = NULL;
3090 buffer->transaction = NULL;
56b468fc 3091 pr_err("release proc %d, transaction %d, not freed\n",
355b0502
GKH		 3092 proc->pid, t->debug_id);
3093 /*BUG();*/
3094 }
53413e7d 3095
355b0502
GKH		 3096 binder_free_buf(proc, buffer);
3097 buffers++;
3098 }
3099
3100 binder_stats_deleted(BINDER_STAT_PROC);
3101
3102 page_count = 0;
3103 if (proc->pages) {
3104 int i;
53413e7d 3105
355b0502 3106 for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) {
ba97bc5b
ME		 3107 void *page_addr;
3108
3109 if (!proc->pages[i])
3110 continue;
3111
3112 page_addr = proc->buffer + i * PAGE_SIZE;
3113 binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
c07c933f
ME		 3114 "%s: %d: page %d at %p not freed\n",
3115 __func__, proc->pid, i, page_addr);
ba97bc5b
ME		 3116 unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
3117 __free_page(proc->pages[i]);
3118 page_count++;
355b0502
GKH		 3119 }
3120 kfree(proc->pages);
3121 vfree(proc->buffer);
3122 }
3123
3124 put_task_struct(proc->tsk);
3125
3126 binder_debug(BINDER_DEBUG_OPEN_CLOSE,
c07c933f
ME		 3127 "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n",
3128 __func__, proc->pid, threads, nodes, incoming_refs,
3129 outgoing_refs, active_transactions, buffers, page_count);
355b0502
GKH		 3130
3131 kfree(proc);
3132}
3133
3134static void binder_deferred_func(struct work_struct *work)
3135{
3136 struct binder_proc *proc;
3137 struct files_struct *files;
3138
3139 int defer;
10f62861 3140
355b0502 3141 do {
975a1ac9 3142 binder_lock(__func__);
355b0502
GKH		 3143 mutex_lock(&binder_deferred_lock);
3144 if (!hlist_empty(&binder_deferred_list)) {
3145 proc = hlist_entry(binder_deferred_list.first,
3146 struct binder_proc, deferred_work_node);
3147 hlist_del_init(&proc->deferred_work_node);
3148 defer = proc->deferred_work;
3149 proc->deferred_work = 0;
3150 } else {
3151 proc = NULL;
3152 defer = 0;
3153 }
3154 mutex_unlock(&binder_deferred_lock);
3155
3156 files = NULL;
3157 if (defer & BINDER_DEFERRED_PUT_FILES) {
3158 files = proc->files;
3159 if (files)
3160 proc->files = NULL;
3161 }
3162
3163 if (defer & BINDER_DEFERRED_FLUSH)
3164 binder_deferred_flush(proc);
3165
3166 if (defer & BINDER_DEFERRED_RELEASE)
3167 binder_deferred_release(proc); /* frees proc */
3168
975a1ac9 3169 binder_unlock(__func__);
355b0502
GKH		 3170 if (files)
3171 put_files_struct(files);
3172 } while (proc);
3173}
3174static DECLARE_WORK(binder_deferred_work, binder_deferred_func);
3175
3176static void
3177binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer)
3178{
3179 mutex_lock(&binder_deferred_lock);
3180 proc->deferred_work |= defer;
3181 if (hlist_unhashed(&proc->deferred_work_node)) {
3182 hlist_add_head(&proc->deferred_work_node,
3183 &binder_deferred_list);
3c762a49 3184 queue_work(binder_deferred_workqueue, &binder_deferred_work);
355b0502
GKH		 3185 }
3186 mutex_unlock(&binder_deferred_lock);
3187}
3188
5249f488
AH		 3189static void print_binder_transaction(struct seq_file *m, const char *prefix,
3190 struct binder_transaction *t)
3191{
3192 seq_printf(m,
3193 "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d",
3194 prefix, t->debug_id, t,
3195 t->from ? t->from->proc->pid : 0,
3196 t->from ? t->from->pid : 0,
3197 t->to_proc ? t->to_proc->pid : 0,
3198 t->to_thread ? t->to_thread->pid : 0,
3199 t->code, t->flags, t->priority, t->need_reply);
355b0502 3200 if (t->buffer == NULL) {
5249f488
AH		 3201 seq_puts(m, " buffer free\n");
3202 return;
355b0502 3203 }
5249f488
AH		 3204 if (t->buffer->target_node)
3205 seq_printf(m, " node %d",
3206 t->buffer->target_node->debug_id);
3207 seq_printf(m, " size %zd:%zd data %p\n",
3208 t->buffer->data_size, t->buffer->offsets_size,
3209 t->buffer->data);
355b0502
GKH		 3210}
3211
5249f488
AH		 3212static void print_binder_buffer(struct seq_file *m, const char *prefix,
3213 struct binder_buffer *buffer)
355b0502 3214{
5249f488
AH		 3215 seq_printf(m, "%s %d: %p size %zd:%zd %s\n",
3216 prefix, buffer->debug_id, buffer->data,
3217 buffer->data_size, buffer->offsets_size,
3218 buffer->transaction ? "active" : "delivered");
355b0502
GKH		 3219}
3220
5249f488
AH		 3221static void print_binder_work(struct seq_file *m, const char *prefix,
3222 const char *transaction_prefix,
3223 struct binder_work *w)
355b0502
GKH		 3224{
3225 struct binder_node *node;
3226 struct binder_transaction *t;
3227
3228 switch (w->type) {
3229 case BINDER_WORK_TRANSACTION:
3230 t = container_of(w, struct binder_transaction, work);
5249f488 3231 print_binder_transaction(m, transaction_prefix, t);
355b0502
GKH		 3232 break;
3233 case BINDER_WORK_TRANSACTION_COMPLETE:
5249f488 3234 seq_printf(m, "%stransaction complete\n", prefix);
355b0502
GKH		 3235 break;
3236 case BINDER_WORK_NODE:
3237 node = container_of(w, struct binder_node, work);
da49889d
AH		 3238 seq_printf(m, "%snode work %d: u%016llx c%016llx\n",
3239 prefix, node->debug_id,
3240 (u64)node->ptr, (u64)node->cookie);
355b0502
GKH		 3241 break;
3242 case BINDER_WORK_DEAD_BINDER:
5249f488 3243 seq_printf(m, "%shas dead binder\n", prefix);
355b0502
GKH		 3244 break;
3245 case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
5249f488 3246 seq_printf(m, "%shas cleared dead binder\n", prefix);
355b0502
GKH		 3247 break;
3248 case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
5249f488 3249 seq_printf(m, "%shas cleared death notification\n", prefix);
355b0502
GKH		 3250 break;
3251 default:
5249f488 3252 seq_printf(m, "%sunknown work: type %d\n", prefix, w->type);
355b0502
GKH		 3253 break;
3254 }
355b0502
GKH		 3255}
3256
5249f488
AH		 3257static void print_binder_thread(struct seq_file *m,
3258 struct binder_thread *thread,
3259 int print_always)
355b0502
GKH		 3260{
3261 struct binder_transaction *t;
3262 struct binder_work *w;
5249f488
AH		 3263 size_t start_pos = m->count;
3264 size_t header_pos;
355b0502 3265
5249f488
AH		 3266 seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper);
3267 header_pos = m->count;
355b0502
GKH		 3268 t = thread->transaction_stack;
3269 while (t) {
355b0502 3270 if (t->from == thread) {
5249f488
AH		 3271 print_binder_transaction(m,
3272 " outgoing transaction", t);
355b0502
GKH		 3273 t = t->from_parent;
3274 } else if (t->to_thread == thread) {
5249f488
AH		 3275 print_binder_transaction(m,
3276 " incoming transaction", t);
355b0502
GKH		 3277 t = t->to_parent;
3278 } else {
5249f488 3279 print_binder_transaction(m, " bad transaction", t);
355b0502
GKH		 3280 t = NULL;
3281 }
3282 }
3283 list_for_each_entry(w, &thread->todo, entry) {
5249f488 3284 print_binder_work(m, " ", " pending transaction", w);
355b0502 3285 }
5249f488
AH		 3286 if (!print_always && m->count == header_pos)
3287 m->count = start_pos;
355b0502
GKH		 3288}
3289
5249f488 3290static void print_binder_node(struct seq_file *m, struct binder_node *node)
355b0502
GKH		 3291{
3292 struct binder_ref *ref;
355b0502
GKH		 3293 struct binder_work *w;
3294 int count;
3295
3296 count = 0;
b67bfe0d 3297 hlist_for_each_entry(ref, &node->refs, node_entry)
355b0502
GKH		 3298 count++;
3299
da49889d
AH		 3300 seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d",
3301 node->debug_id, (u64)node->ptr, (u64)node->cookie,
5249f488
AH		 3302 node->has_strong_ref, node->has_weak_ref,
3303 node->local_strong_refs, node->local_weak_refs,
3304 node->internal_strong_refs, count);
355b0502 3305 if (count) {
5249f488 3306 seq_puts(m, " proc");
b67bfe0d 3307 hlist_for_each_entry(ref, &node->refs, node_entry)
5249f488 3308 seq_printf(m, " %d", ref->proc->pid);
355b0502 3309 }
5249f488
AH		 3310 seq_puts(m, "\n");
3311 list_for_each_entry(w, &node->async_todo, entry)
3312 print_binder_work(m, " ",
3313 " pending async transaction", w);
355b0502
GKH		 3314}
3315
5249f488 3316static void print_binder_ref(struct seq_file *m, struct binder_ref *ref)
355b0502 3317{
5249f488
AH		 3318 seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n",
3319 ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ",
3320 ref->node->debug_id, ref->strong, ref->weak, ref->death);
355b0502
GKH		 3321}
3322
5249f488
AH		 3323static void print_binder_proc(struct seq_file *m,
3324 struct binder_proc *proc, int print_all)
355b0502
GKH		 3325{
3326 struct binder_work *w;
3327 struct rb_node *n;
5249f488
AH		 3328 size_t start_pos = m->count;
3329 size_t header_pos;
3330
3331 seq_printf(m, "proc %d\n", proc->pid);
3332 header_pos = m->count;
3333
3334 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
3335 print_binder_thread(m, rb_entry(n, struct binder_thread,
3336 rb_node), print_all);
3337 for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
355b0502
GKH		 3338 struct binder_node *node = rb_entry(n, struct binder_node,
3339 rb_node);
3340 if (print_all || node->has_async_transaction)
5249f488 3341 print_binder_node(m, node);
355b0502
GKH		 3342 }
3343 if (print_all) {
3344 for (n = rb_first(&proc->refs_by_desc);
5249f488 3345 n != NULL;
355b0502 3346 n = rb_next(n))
5249f488
AH		 3347 print_binder_ref(m, rb_entry(n, struct binder_ref,
3348 rb_node_desc));
355b0502 3349 }
5249f488
AH		 3350 for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
3351 print_binder_buffer(m, " buffer",
3352 rb_entry(n, struct binder_buffer, rb_node));
3353 list_for_each_entry(w, &proc->todo, entry)
3354 print_binder_work(m, " ", " pending transaction", w);
355b0502 3355 list_for_each_entry(w, &proc->delivered_death, entry) {
5249f488 3356 seq_puts(m, " has delivered dead binder\n");
355b0502
GKH		 3357 break;
3358 }
5249f488
AH		 3359 if (!print_all && m->count == header_pos)
3360 m->count = start_pos;
355b0502
GKH		 3361}
3362
167bccbd 3363static const char * const binder_return_strings[] = {
355b0502
GKH		 3364 "BR_ERROR",
3365 "BR_OK",
3366 "BR_TRANSACTION",
3367 "BR_REPLY",
3368 "BR_ACQUIRE_RESULT",
3369 "BR_DEAD_REPLY",
3370 "BR_TRANSACTION_COMPLETE",
3371 "BR_INCREFS",
3372 "BR_ACQUIRE",
3373 "BR_RELEASE",
3374 "BR_DECREFS",
3375 "BR_ATTEMPT_ACQUIRE",
3376 "BR_NOOP",
3377 "BR_SPAWN_LOOPER",
3378 "BR_FINISHED",
3379 "BR_DEAD_BINDER",
3380 "BR_CLEAR_DEATH_NOTIFICATION_DONE",
3381 "BR_FAILED_REPLY"
3382};
3383
167bccbd 3384static const char * const binder_command_strings[] = {
355b0502
GKH		 3385 "BC_TRANSACTION",
3386 "BC_REPLY",
3387 "BC_ACQUIRE_RESULT",
3388 "BC_FREE_BUFFER",
3389 "BC_INCREFS",
3390 "BC_ACQUIRE",
3391 "BC_RELEASE",
3392 "BC_DECREFS",
3393 "BC_INCREFS_DONE",
3394 "BC_ACQUIRE_DONE",
3395 "BC_ATTEMPT_ACQUIRE",
3396 "BC_REGISTER_LOOPER",
3397 "BC_ENTER_LOOPER",
3398 "BC_EXIT_LOOPER",
3399 "BC_REQUEST_DEATH_NOTIFICATION",
3400 "BC_CLEAR_DEATH_NOTIFICATION",
3401 "BC_DEAD_BINDER_DONE"
3402};
3403
167bccbd 3404static const char * const binder_objstat_strings[] = {
355b0502
GKH		 3405 "proc",
3406 "thread",
3407 "node",
3408 "ref",
3409 "death",
3410 "transaction",
3411 "transaction_complete"
3412};
3413
5249f488
AH		 3414static void print_binder_stats(struct seq_file *m, const char *prefix,
3415 struct binder_stats *stats)
355b0502
GKH		 3416{
3417 int i;
3418
3419 BUILD_BUG_ON(ARRAY_SIZE(stats->bc) !=
5249f488 3420 ARRAY_SIZE(binder_command_strings));
355b0502
GKH		 3421 for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
3422 if (stats->bc[i])
5249f488
AH		 3423 seq_printf(m, "%s%s: %d\n", prefix,
3424 binder_command_strings[i], stats->bc[i]);
355b0502
GKH		 3425 }
3426
3427 BUILD_BUG_ON(ARRAY_SIZE(stats->br) !=
5249f488 3428 ARRAY_SIZE(binder_return_strings));
355b0502
GKH		 3429 for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
3430 if (stats->br[i])
5249f488
AH		 3431 seq_printf(m, "%s%s: %d\n", prefix,
3432 binder_return_strings[i], stats->br[i]);
355b0502
GKH		 3433 }
3434
3435 BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
5249f488 3436 ARRAY_SIZE(binder_objstat_strings));
355b0502 3437 BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
5249f488 3438 ARRAY_SIZE(stats->obj_deleted));
355b0502
GKH		 3439 for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
3440 if (stats->obj_created[i] || stats->obj_deleted[i])
5249f488
AH		 3441 seq_printf(m, "%s%s: active %d total %d\n", prefix,
3442 binder_objstat_strings[i],
3443 stats->obj_created[i] - stats->obj_deleted[i],
3444 stats->obj_created[i]);
355b0502 3445 }
355b0502
GKH		 3446}
3447
5249f488
AH		 3448static void print_binder_proc_stats(struct seq_file *m,
3449 struct binder_proc *proc)
355b0502
GKH		 3450{
3451 struct binder_work *w;
3452 struct rb_node *n;
3453 int count, strong, weak;
3454
5249f488 3455 seq_printf(m, "proc %d\n", proc->pid);
355b0502
GKH		 3456 count = 0;
3457 for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
3458 count++;
5249f488
AH		 3459 seq_printf(m, " threads: %d\n", count);
3460 seq_printf(m, " requested threads: %d+%d/%d\n"
355b0502
GKH		 3461 " ready threads %d\n"
3462 " free async space %zd\n", proc->requested_threads,
3463 proc->requested_threads_started, proc->max_threads,
3464 proc->ready_threads, proc->free_async_space);
355b0502
GKH		 3465 count = 0;
3466 for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
3467 count++;
5249f488 3468 seq_printf(m, " nodes: %d\n", count);
355b0502
GKH		 3469 count = 0;
3470 strong = 0;
3471 weak = 0;
3472 for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
3473 struct binder_ref *ref = rb_entry(n, struct binder_ref,
3474 rb_node_desc);
3475 count++;
3476 strong += ref->strong;
3477 weak += ref->weak;
3478 }
5249f488 3479 seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak);
355b0502
GKH		 3480
3481 count = 0;
3482 for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
3483 count++;
5249f488 3484 seq_printf(m, " buffers: %d\n", count);
355b0502
GKH		 3485
3486 count = 0;
3487 list_for_each_entry(w, &proc->todo, entry) {
3488 switch (w->type) {
3489 case BINDER_WORK_TRANSACTION:
3490 count++;
3491 break;
3492 default:
3493 break;
3494 }
3495 }
5249f488 3496 seq_printf(m, " pending transactions: %d\n", count);
355b0502 3497
5249f488 3498 print_binder_stats(m, " ", &proc->stats);
355b0502
GKH		 3499}
3500
3501
5249f488 3502static int binder_state_show(struct seq_file *m, void *unused)
355b0502
GKH		 3503{
3504 struct binder_proc *proc;
355b0502 3505 struct binder_node *node;
355b0502
GKH		 3506 int do_lock = !binder_debug_no_lock;
3507
355b0502 3508 if (do_lock)
975a1ac9 3509 binder_lock(__func__);
355b0502 3510
5249f488 3511 seq_puts(m, "binder state:\n");
355b0502
GKH		 3512
3513 if (!hlist_empty(&binder_dead_nodes))
5249f488 3514 seq_puts(m, "dead nodes:\n");
b67bfe0d 3515 hlist_for_each_entry(node, &binder_dead_nodes, dead_node)
5249f488 3516 print_binder_node(m, node);
355b0502 3517
b67bfe0d 3518 hlist_for_each_entry(proc, &binder_procs, proc_node)
5249f488 3519 print_binder_proc(m, proc, 1);
355b0502 3520 if (do_lock)
975a1ac9 3521 binder_unlock(__func__);
5249f488 3522 return 0;
355b0502
GKH		 3523}
3524
5249f488 3525static int binder_stats_show(struct seq_file *m, void *unused)
355b0502
GKH		 3526{
3527 struct binder_proc *proc;
355b0502
GKH		 3528 int do_lock = !binder_debug_no_lock;
3529
355b0502 3530 if (do_lock)
975a1ac9 3531 binder_lock(__func__);
355b0502 3532
5249f488 3533 seq_puts(m, "binder stats:\n");
355b0502 3534
5249f488 3535 print_binder_stats(m, "", &binder_stats);
355b0502 3536
b67bfe0d 3537 hlist_for_each_entry(proc, &binder_procs, proc_node)
5249f488 3538 print_binder_proc_stats(m, proc);
355b0502 3539 if (do_lock)
975a1ac9 3540 binder_unlock(__func__);
5249f488 3541 return 0;
355b0502
GKH		 3542}
3543
5249f488 3544static int binder_transactions_show(struct seq_file *m, void *unused)
355b0502
GKH		 3545{
3546 struct binder_proc *proc;
355b0502
GKH		 3547 int do_lock = !binder_debug_no_lock;
3548
355b0502 3549 if (do_lock)
975a1ac9 3550 binder_lock(__func__);
355b0502 3551
5249f488 3552 seq_puts(m, "binder transactions:\n");
b67bfe0d 3553 hlist_for_each_entry(proc, &binder_procs, proc_node)
5249f488 3554 print_binder_proc(m, proc, 0);
355b0502 3555 if (do_lock)
975a1ac9 3556 binder_unlock(__func__);
5249f488 3557 return 0;
355b0502
GKH		 3558}
3559
5249f488 3560static int binder_proc_show(struct seq_file *m, void *unused)
355b0502 3561{
5249f488 3562 struct binder_proc *proc = m->private;
355b0502
GKH		 3563 int do_lock = !binder_debug_no_lock;
3564
355b0502 3565 if (do_lock)
975a1ac9 3566 binder_lock(__func__);
5249f488
AH		 3567 seq_puts(m, "binder proc state:\n");
3568 print_binder_proc(m, proc, 1);
355b0502 3569 if (do_lock)
975a1ac9 3570 binder_unlock(__func__);
5249f488 3571 return 0;
355b0502
GKH		 3572}
3573
5249f488 3574static void print_binder_transaction_log_entry(struct seq_file *m,
355b0502
GKH		 3575 struct binder_transaction_log_entry *e)
3576{
5249f488
AH		 3577 seq_printf(m,
3578 "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n",
3579 e->debug_id, (e->call_type == 2) ? "reply" :
3580 ((e->call_type == 1) ? "async" : "call "), e->from_proc,
3581 e->from_thread, e->to_proc, e->to_thread, e->to_node,
3582 e->target_handle, e->data_size, e->offsets_size);
355b0502
GKH		 3583}
3584
5249f488 3585static int binder_transaction_log_show(struct seq_file *m, void *unused)
355b0502 3586{
5249f488 3587 struct binder_transaction_log *log = m->private;
355b0502 3588 int i;
355b0502
GKH		 3589
3590 if (log->full) {
5249f488
AH		 3591 for (i = log->next; i < ARRAY_SIZE(log->entry); i++)
3592 print_binder_transaction_log_entry(m, &log->entry[i]);
355b0502 3593 }
5249f488
AH		 3594 for (i = 0; i < log->next; i++)
3595 print_binder_transaction_log_entry(m, &log->entry[i]);
3596 return 0;
355b0502
GKH		 3597}
3598
3599static const struct file_operations binder_fops = {
3600 .owner = THIS_MODULE,
3601 .poll = binder_poll,
3602 .unlocked_ioctl = binder_ioctl,
da49889d 3603 .compat_ioctl = binder_ioctl,
355b0502
GKH		 3604 .mmap = binder_mmap,
3605 .open = binder_open,
3606 .flush = binder_flush,
3607 .release = binder_release,
3608};
3609
3610static struct miscdevice binder_miscdev = {
3611 .minor = MISC_DYNAMIC_MINOR,
3612 .name = "binder",
3613 .fops = &binder_fops
3614};
3615
5249f488
AH		 3616BINDER_DEBUG_ENTRY(state);
3617BINDER_DEBUG_ENTRY(stats);
3618BINDER_DEBUG_ENTRY(transactions);
3619BINDER_DEBUG_ENTRY(transaction_log);
3620
355b0502
GKH		 3621static int __init binder_init(void)
3622{
3623 int ret;
3624
3c762a49
AH		 3625 binder_deferred_workqueue = create_singlethread_workqueue("binder");
3626 if (!binder_deferred_workqueue)
3627 return -ENOMEM;
3628
16b66554
AH		 3629 binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL);
3630 if (binder_debugfs_dir_entry_root)
3631 binder_debugfs_dir_entry_proc = debugfs_create_dir("proc",
3632 binder_debugfs_dir_entry_root);
355b0502 3633 ret = misc_register(&binder_miscdev);
16b66554
AH		 3634 if (binder_debugfs_dir_entry_root) {
3635 debugfs_create_file("state",
3636 S_IRUGO,
3637 binder_debugfs_dir_entry_root,
3638 NULL,
3639 &binder_state_fops);
3640 debugfs_create_file("stats",
3641 S_IRUGO,
3642 binder_debugfs_dir_entry_root,
3643 NULL,
3644 &binder_stats_fops);
3645 debugfs_create_file("transactions",
3646 S_IRUGO,
3647 binder_debugfs_dir_entry_root,
3648 NULL,
3649 &binder_transactions_fops);
3650 debugfs_create_file("transaction_log",
3651 S_IRUGO,
3652 binder_debugfs_dir_entry_root,
3653 &binder_transaction_log,
3654 &binder_transaction_log_fops);
3655 debugfs_create_file("failed_transaction_log",
3656 S_IRUGO,
3657 binder_debugfs_dir_entry_root,
3658 &binder_transaction_log_failed,
3659 &binder_transaction_log_fops);
355b0502
GKH		 3660 }
3661 return ret;
3662}
3663
3664device_initcall(binder_init);
3665
975a1ac9
AH		 3666#define CREATE_TRACE_POINTS
3667#include "binder_trace.h"
3668
355b0502 3669MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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