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