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9c92ab61 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
355b0502 GKH |
2 | /* binder.c |
3 | * | |
4 | * Android IPC Subsystem | |
5 | * | |
6 | * Copyright (C) 2007-2008 Google, Inc. | |
355b0502 GKH |
7 | */ |
8 | ||
9630fe88 TK |
9 | /* |
10 | * Locking overview | |
11 | * | |
12 | * There are 3 main spinlocks which must be acquired in the | |
13 | * order shown: | |
14 | * | |
15 | * 1) proc->outer_lock : protects binder_ref | |
16 | * binder_proc_lock() and binder_proc_unlock() are | |
17 | * used to acq/rel. | |
18 | * 2) node->lock : protects most fields of binder_node. | |
19 | * binder_node_lock() and binder_node_unlock() are | |
20 | * used to acq/rel | |
21 | * 3) proc->inner_lock : protects the thread and node lists | |
1b77e9dc MC |
22 | * (proc->threads, proc->waiting_threads, proc->nodes) |
23 | * and all todo lists associated with the binder_proc | |
24 | * (proc->todo, thread->todo, proc->delivered_death and | |
25 | * node->async_todo), as well as thread->transaction_stack | |
9630fe88 TK |
26 | * binder_inner_proc_lock() and binder_inner_proc_unlock() |
27 | * are used to acq/rel | |
28 | * | |
29 | * Any lock under procA must never be nested under any lock at the same | |
30 | * level or below on procB. | |
31 | * | |
32 | * Functions that require a lock held on entry indicate which lock | |
33 | * in the suffix of the function name: | |
34 | * | |
35 | * foo_olocked() : requires node->outer_lock | |
36 | * foo_nlocked() : requires node->lock | |
37 | * foo_ilocked() : requires proc->inner_lock | |
38 | * foo_oilocked(): requires proc->outer_lock and proc->inner_lock | |
39 | * foo_nilocked(): requires node->lock and proc->inner_lock | |
40 | * ... | |
41 | */ | |
42 | ||
56b468fc AS |
43 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
44 | ||
355b0502 GKH |
45 | #include <linux/fdtable.h> |
46 | #include <linux/file.h> | |
e2610b26 | 47 | #include <linux/freezer.h> |
355b0502 GKH |
48 | #include <linux/fs.h> |
49 | #include <linux/list.h> | |
50 | #include <linux/miscdevice.h> | |
355b0502 GKH |
51 | #include <linux/module.h> |
52 | #include <linux/mutex.h> | |
53 | #include <linux/nsproxy.h> | |
54 | #include <linux/poll.h> | |
16b66554 | 55 | #include <linux/debugfs.h> |
355b0502 | 56 | #include <linux/rbtree.h> |
3f07c014 | 57 | #include <linux/sched/signal.h> |
6e84f315 | 58 | #include <linux/sched/mm.h> |
5249f488 | 59 | #include <linux/seq_file.h> |
51d8a7ec | 60 | #include <linux/string.h> |
355b0502 | 61 | #include <linux/uaccess.h> |
17cf22c3 | 62 | #include <linux/pid_namespace.h> |
79af7307 | 63 | #include <linux/security.h> |
9630fe88 | 64 | #include <linux/spinlock.h> |
128f3804 | 65 | #include <linux/ratelimit.h> |
44d8047f | 66 | #include <linux/syscalls.h> |
80cd7956 | 67 | #include <linux/task_work.h> |
990be747 | 68 | #include <linux/sizes.h> |
355b0502 | 69 | |
9246a4a9 | 70 | #include <uapi/linux/android/binder.h> |
f371a7c1 GR |
71 | |
72 | #include <asm/cacheflush.h> | |
73 | ||
3ad20fe3 | 74 | #include "binder_internal.h" |
975a1ac9 | 75 | #include "binder_trace.h" |
355b0502 | 76 | |
c44b1231 | 77 | static HLIST_HEAD(binder_deferred_list); |
355b0502 GKH |
78 | static DEFINE_MUTEX(binder_deferred_lock); |
79 | ||
ac4812c5 | 80 | static HLIST_HEAD(binder_devices); |
355b0502 | 81 | static HLIST_HEAD(binder_procs); |
c44b1231 TK |
82 | static DEFINE_MUTEX(binder_procs_lock); |
83 | ||
355b0502 | 84 | static HLIST_HEAD(binder_dead_nodes); |
c44b1231 | 85 | static DEFINE_SPINLOCK(binder_dead_nodes_lock); |
355b0502 | 86 | |
16b66554 AH |
87 | static struct dentry *binder_debugfs_dir_entry_root; |
88 | static struct dentry *binder_debugfs_dir_entry_proc; | |
656a800a | 89 | static atomic_t binder_last_id; |
355b0502 | 90 | |
c13e0a52 YL |
91 | static int proc_show(struct seq_file *m, void *unused); |
92 | DEFINE_SHOW_ATTRIBUTE(proc); | |
355b0502 | 93 | |
355b0502 GKH |
94 | #define FORBIDDEN_MMAP_FLAGS (VM_WRITE) |
95 | ||
355b0502 GKH |
96 | enum { |
97 | BINDER_DEBUG_USER_ERROR = 1U << 0, | |
98 | BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1, | |
99 | BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2, | |
100 | BINDER_DEBUG_OPEN_CLOSE = 1U << 3, | |
101 | BINDER_DEBUG_DEAD_BINDER = 1U << 4, | |
102 | BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5, | |
103 | BINDER_DEBUG_READ_WRITE = 1U << 6, | |
104 | BINDER_DEBUG_USER_REFS = 1U << 7, | |
105 | BINDER_DEBUG_THREADS = 1U << 8, | |
106 | BINDER_DEBUG_TRANSACTION = 1U << 9, | |
107 | BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10, | |
108 | BINDER_DEBUG_FREE_BUFFER = 1U << 11, | |
109 | BINDER_DEBUG_INTERNAL_REFS = 1U << 12, | |
19c98724 | 110 | BINDER_DEBUG_PRIORITY_CAP = 1U << 13, |
9630fe88 | 111 | BINDER_DEBUG_SPINLOCKS = 1U << 14, |
355b0502 GKH |
112 | }; |
113 | static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR | | |
114 | BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION; | |
21d02ddf | 115 | module_param_named(debug_mask, binder_debug_mask, uint, 0644); |
355b0502 | 116 | |
ca2864c6 | 117 | char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES; |
ac4812c5 MC |
118 | module_param_named(devices, binder_devices_param, charp, 0444); |
119 | ||
355b0502 GKH |
120 | static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait); |
121 | static int binder_stop_on_user_error; | |
122 | ||
123 | static int binder_set_stop_on_user_error(const char *val, | |
e4dca7b7 | 124 | const struct kernel_param *kp) |
355b0502 GKH |
125 | { |
126 | int ret; | |
10f62861 | 127 | |
355b0502 GKH |
128 | ret = param_set_int(val, kp); |
129 | if (binder_stop_on_user_error < 2) | |
130 | wake_up(&binder_user_error_wait); | |
131 | return ret; | |
132 | } | |
133 | module_param_call(stop_on_user_error, binder_set_stop_on_user_error, | |
21d02ddf | 134 | param_get_int, &binder_stop_on_user_error, 0644); |
355b0502 GKH |
135 | |
136 | #define binder_debug(mask, x...) \ | |
137 | do { \ | |
138 | if (binder_debug_mask & mask) \ | |
128f3804 | 139 | pr_info_ratelimited(x); \ |
355b0502 GKH |
140 | } while (0) |
141 | ||
142 | #define binder_user_error(x...) \ | |
143 | do { \ | |
144 | if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \ | |
128f3804 | 145 | pr_info_ratelimited(x); \ |
355b0502 GKH |
146 | if (binder_stop_on_user_error) \ |
147 | binder_stop_on_user_error = 2; \ | |
148 | } while (0) | |
149 | ||
feba3900 MC |
150 | #define to_flat_binder_object(hdr) \ |
151 | container_of(hdr, struct flat_binder_object, hdr) | |
152 | ||
153 | #define to_binder_fd_object(hdr) container_of(hdr, struct binder_fd_object, hdr) | |
154 | ||
7980240b MC |
155 | #define to_binder_buffer_object(hdr) \ |
156 | container_of(hdr, struct binder_buffer_object, hdr) | |
157 | ||
def95c73 MC |
158 | #define to_binder_fd_array_object(hdr) \ |
159 | container_of(hdr, struct binder_fd_array_object, hdr) | |
160 | ||
355b0502 GKH |
161 | static struct binder_stats binder_stats; |
162 | ||
163 | static inline void binder_stats_deleted(enum binder_stat_types type) | |
164 | { | |
0953c797 | 165 | atomic_inc(&binder_stats.obj_deleted[type]); |
355b0502 GKH |
166 | } |
167 | ||
168 | static inline void binder_stats_created(enum binder_stat_types type) | |
169 | { | |
0953c797 | 170 | atomic_inc(&binder_stats.obj_created[type]); |
355b0502 GKH |
171 | } |
172 | ||
03e2e07e HV |
173 | struct binder_transaction_log binder_transaction_log; |
174 | struct binder_transaction_log binder_transaction_log_failed; | |
355b0502 GKH |
175 | |
176 | static struct binder_transaction_log_entry *binder_transaction_log_add( | |
177 | struct binder_transaction_log *log) | |
178 | { | |
179 | struct binder_transaction_log_entry *e; | |
d99c7333 | 180 | unsigned int cur = atomic_inc_return(&log->cur); |
10f62861 | 181 | |
d99c7333 | 182 | if (cur >= ARRAY_SIZE(log->entry)) |
197410ad | 183 | log->full = true; |
d99c7333 TK |
184 | e = &log->entry[cur % ARRAY_SIZE(log->entry)]; |
185 | WRITE_ONCE(e->debug_id_done, 0); | |
186 | /* | |
187 | * write-barrier to synchronize access to e->debug_id_done. | |
188 | * We make sure the initialized 0 value is seen before | |
189 | * memset() other fields are zeroed by memset. | |
190 | */ | |
191 | smp_wmb(); | |
192 | memset(e, 0, sizeof(*e)); | |
355b0502 GKH |
193 | return e; |
194 | } | |
195 | ||
355b0502 | 196 | enum binder_deferred_state { |
44d8047f TK |
197 | BINDER_DEFERRED_FLUSH = 0x01, |
198 | BINDER_DEFERRED_RELEASE = 0x02, | |
355b0502 GKH |
199 | }; |
200 | ||
355b0502 GKH |
201 | enum { |
202 | BINDER_LOOPER_STATE_REGISTERED = 0x01, | |
203 | BINDER_LOOPER_STATE_ENTERED = 0x02, | |
204 | BINDER_LOOPER_STATE_EXITED = 0x04, | |
205 | BINDER_LOOPER_STATE_INVALID = 0x08, | |
206 | BINDER_LOOPER_STATE_WAITING = 0x10, | |
1b77e9dc | 207 | BINDER_LOOPER_STATE_POLL = 0x20, |
355b0502 GKH |
208 | }; |
209 | ||
9630fe88 TK |
210 | /** |
211 | * binder_proc_lock() - Acquire outer lock for given binder_proc | |
212 | * @proc: struct binder_proc to acquire | |
213 | * | |
214 | * Acquires proc->outer_lock. Used to protect binder_ref | |
215 | * structures associated with the given proc. | |
216 | */ | |
217 | #define binder_proc_lock(proc) _binder_proc_lock(proc, __LINE__) | |
218 | static void | |
219 | _binder_proc_lock(struct binder_proc *proc, int line) | |
324fa64c | 220 | __acquires(&proc->outer_lock) |
9630fe88 TK |
221 | { |
222 | binder_debug(BINDER_DEBUG_SPINLOCKS, | |
223 | "%s: line=%d\n", __func__, line); | |
224 | spin_lock(&proc->outer_lock); | |
225 | } | |
226 | ||
227 | /** | |
228 | * binder_proc_unlock() - Release spinlock for given binder_proc | |
229 | * @proc: struct binder_proc to acquire | |
230 | * | |
231 | * Release lock acquired via binder_proc_lock() | |
232 | */ | |
233 | #define binder_proc_unlock(_proc) _binder_proc_unlock(_proc, __LINE__) | |
234 | static void | |
235 | _binder_proc_unlock(struct binder_proc *proc, int line) | |
324fa64c | 236 | __releases(&proc->outer_lock) |
9630fe88 TK |
237 | { |
238 | binder_debug(BINDER_DEBUG_SPINLOCKS, | |
239 | "%s: line=%d\n", __func__, line); | |
240 | spin_unlock(&proc->outer_lock); | |
241 | } | |
242 | ||
243 | /** | |
244 | * binder_inner_proc_lock() - Acquire inner lock for given binder_proc | |
245 | * @proc: struct binder_proc to acquire | |
246 | * | |
247 | * Acquires proc->inner_lock. Used to protect todo lists | |
248 | */ | |
249 | #define binder_inner_proc_lock(proc) _binder_inner_proc_lock(proc, __LINE__) | |
250 | static void | |
251 | _binder_inner_proc_lock(struct binder_proc *proc, int line) | |
324fa64c | 252 | __acquires(&proc->inner_lock) |
9630fe88 TK |
253 | { |
254 | binder_debug(BINDER_DEBUG_SPINLOCKS, | |
255 | "%s: line=%d\n", __func__, line); | |
256 | spin_lock(&proc->inner_lock); | |
257 | } | |
258 | ||
259 | /** | |
260 | * binder_inner_proc_unlock() - Release inner lock for given binder_proc | |
261 | * @proc: struct binder_proc to acquire | |
262 | * | |
263 | * Release lock acquired via binder_inner_proc_lock() | |
264 | */ | |
265 | #define binder_inner_proc_unlock(proc) _binder_inner_proc_unlock(proc, __LINE__) | |
266 | static void | |
267 | _binder_inner_proc_unlock(struct binder_proc *proc, int line) | |
324fa64c | 268 | __releases(&proc->inner_lock) |
9630fe88 TK |
269 | { |
270 | binder_debug(BINDER_DEBUG_SPINLOCKS, | |
271 | "%s: line=%d\n", __func__, line); | |
272 | spin_unlock(&proc->inner_lock); | |
273 | } | |
274 | ||
275 | /** | |
276 | * binder_node_lock() - Acquire spinlock for given binder_node | |
277 | * @node: struct binder_node to acquire | |
278 | * | |
279 | * Acquires node->lock. Used to protect binder_node fields | |
280 | */ | |
281 | #define binder_node_lock(node) _binder_node_lock(node, __LINE__) | |
282 | static void | |
283 | _binder_node_lock(struct binder_node *node, int line) | |
324fa64c | 284 | __acquires(&node->lock) |
9630fe88 TK |
285 | { |
286 | binder_debug(BINDER_DEBUG_SPINLOCKS, | |
287 | "%s: line=%d\n", __func__, line); | |
288 | spin_lock(&node->lock); | |
289 | } | |
290 | ||
291 | /** | |
292 | * binder_node_unlock() - Release spinlock for given binder_proc | |
293 | * @node: struct binder_node to acquire | |
294 | * | |
295 | * Release lock acquired via binder_node_lock() | |
296 | */ | |
297 | #define binder_node_unlock(node) _binder_node_unlock(node, __LINE__) | |
298 | static void | |
299 | _binder_node_unlock(struct binder_node *node, int line) | |
324fa64c | 300 | __releases(&node->lock) |
9630fe88 TK |
301 | { |
302 | binder_debug(BINDER_DEBUG_SPINLOCKS, | |
303 | "%s: line=%d\n", __func__, line); | |
304 | spin_unlock(&node->lock); | |
305 | } | |
306 | ||
673068ee TK |
307 | /** |
308 | * binder_node_inner_lock() - Acquire node and inner locks | |
309 | * @node: struct binder_node to acquire | |
310 | * | |
311 | * Acquires node->lock. If node->proc also acquires | |
312 | * proc->inner_lock. Used to protect binder_node fields | |
313 | */ | |
314 | #define binder_node_inner_lock(node) _binder_node_inner_lock(node, __LINE__) | |
315 | static void | |
316 | _binder_node_inner_lock(struct binder_node *node, int line) | |
324fa64c | 317 | __acquires(&node->lock) __acquires(&node->proc->inner_lock) |
673068ee TK |
318 | { |
319 | binder_debug(BINDER_DEBUG_SPINLOCKS, | |
320 | "%s: line=%d\n", __func__, line); | |
321 | spin_lock(&node->lock); | |
322 | if (node->proc) | |
323 | binder_inner_proc_lock(node->proc); | |
324fa64c TK |
324 | else |
325 | /* annotation for sparse */ | |
326 | __acquire(&node->proc->inner_lock); | |
673068ee TK |
327 | } |
328 | ||
329 | /** | |
330 | * binder_node_unlock() - Release node and inner locks | |
331 | * @node: struct binder_node to acquire | |
332 | * | |
333 | * Release lock acquired via binder_node_lock() | |
334 | */ | |
335 | #define binder_node_inner_unlock(node) _binder_node_inner_unlock(node, __LINE__) | |
336 | static void | |
337 | _binder_node_inner_unlock(struct binder_node *node, int line) | |
324fa64c | 338 | __releases(&node->lock) __releases(&node->proc->inner_lock) |
673068ee TK |
339 | { |
340 | struct binder_proc *proc = node->proc; | |
341 | ||
342 | binder_debug(BINDER_DEBUG_SPINLOCKS, | |
343 | "%s: line=%d\n", __func__, line); | |
344 | if (proc) | |
345 | binder_inner_proc_unlock(proc); | |
324fa64c TK |
346 | else |
347 | /* annotation for sparse */ | |
348 | __release(&node->proc->inner_lock); | |
673068ee TK |
349 | spin_unlock(&node->lock); |
350 | } | |
351 | ||
72196393 TK |
352 | static bool binder_worklist_empty_ilocked(struct list_head *list) |
353 | { | |
354 | return list_empty(list); | |
355 | } | |
356 | ||
357 | /** | |
358 | * binder_worklist_empty() - Check if no items on the work list | |
359 | * @proc: binder_proc associated with list | |
360 | * @list: list to check | |
361 | * | |
362 | * Return: true if there are no items on list, else false | |
363 | */ | |
364 | static bool binder_worklist_empty(struct binder_proc *proc, | |
365 | struct list_head *list) | |
366 | { | |
367 | bool ret; | |
368 | ||
369 | binder_inner_proc_lock(proc); | |
370 | ret = binder_worklist_empty_ilocked(list); | |
371 | binder_inner_proc_unlock(proc); | |
372 | return ret; | |
373 | } | |
374 | ||
148ade2c MC |
375 | /** |
376 | * binder_enqueue_work_ilocked() - Add an item to the work list | |
377 | * @work: struct binder_work to add to list | |
378 | * @target_list: list to add work to | |
379 | * | |
380 | * Adds the work to the specified list. Asserts that work | |
381 | * is not already on a list. | |
382 | * | |
383 | * Requires the proc->inner_lock to be held. | |
384 | */ | |
72196393 TK |
385 | static void |
386 | binder_enqueue_work_ilocked(struct binder_work *work, | |
387 | struct list_head *target_list) | |
388 | { | |
389 | BUG_ON(target_list == NULL); | |
390 | BUG_ON(work->entry.next && !list_empty(&work->entry)); | |
391 | list_add_tail(&work->entry, target_list); | |
392 | } | |
393 | ||
394 | /** | |
148ade2c MC |
395 | * binder_enqueue_deferred_thread_work_ilocked() - Add deferred thread work |
396 | * @thread: thread to queue work to | |
72196393 | 397 | * @work: struct binder_work to add to list |
72196393 | 398 | * |
148ade2c MC |
399 | * Adds the work to the todo list of the thread. Doesn't set the process_todo |
400 | * flag, which means that (if it wasn't already set) the thread will go to | |
401 | * sleep without handling this work when it calls read. | |
402 | * | |
403 | * Requires the proc->inner_lock to be held. | |
72196393 TK |
404 | */ |
405 | static void | |
148ade2c MC |
406 | binder_enqueue_deferred_thread_work_ilocked(struct binder_thread *thread, |
407 | struct binder_work *work) | |
72196393 | 408 | { |
44b73962 | 409 | WARN_ON(!list_empty(&thread->waiting_thread_node)); |
148ade2c MC |
410 | binder_enqueue_work_ilocked(work, &thread->todo); |
411 | } | |
412 | ||
413 | /** | |
414 | * binder_enqueue_thread_work_ilocked() - Add an item to the thread work list | |
415 | * @thread: thread to queue work to | |
416 | * @work: struct binder_work to add to list | |
417 | * | |
418 | * Adds the work to the todo list of the thread, and enables processing | |
419 | * of the todo queue. | |
420 | * | |
421 | * Requires the proc->inner_lock to be held. | |
422 | */ | |
423 | static void | |
424 | binder_enqueue_thread_work_ilocked(struct binder_thread *thread, | |
425 | struct binder_work *work) | |
426 | { | |
44b73962 | 427 | WARN_ON(!list_empty(&thread->waiting_thread_node)); |
148ade2c MC |
428 | binder_enqueue_work_ilocked(work, &thread->todo); |
429 | thread->process_todo = true; | |
430 | } | |
431 | ||
432 | /** | |
433 | * binder_enqueue_thread_work() - Add an item to the thread work list | |
434 | * @thread: thread to queue work to | |
435 | * @work: struct binder_work to add to list | |
436 | * | |
437 | * Adds the work to the todo list of the thread, and enables processing | |
438 | * of the todo queue. | |
439 | */ | |
440 | static void | |
441 | binder_enqueue_thread_work(struct binder_thread *thread, | |
442 | struct binder_work *work) | |
443 | { | |
444 | binder_inner_proc_lock(thread->proc); | |
445 | binder_enqueue_thread_work_ilocked(thread, work); | |
446 | binder_inner_proc_unlock(thread->proc); | |
72196393 TK |
447 | } |
448 | ||
449 | static void | |
450 | binder_dequeue_work_ilocked(struct binder_work *work) | |
451 | { | |
452 | list_del_init(&work->entry); | |
453 | } | |
454 | ||
455 | /** | |
456 | * binder_dequeue_work() - Removes an item from the work list | |
457 | * @proc: binder_proc associated with list | |
458 | * @work: struct binder_work to remove from list | |
459 | * | |
460 | * Removes the specified work item from whatever list it is on. | |
461 | * Can safely be called if work is not on any list. | |
462 | */ | |
463 | static void | |
464 | binder_dequeue_work(struct binder_proc *proc, struct binder_work *work) | |
465 | { | |
466 | binder_inner_proc_lock(proc); | |
467 | binder_dequeue_work_ilocked(work); | |
468 | binder_inner_proc_unlock(proc); | |
469 | } | |
470 | ||
471 | static struct binder_work *binder_dequeue_work_head_ilocked( | |
472 | struct list_head *list) | |
473 | { | |
474 | struct binder_work *w; | |
475 | ||
476 | w = list_first_entry_or_null(list, struct binder_work, entry); | |
477 | if (w) | |
478 | list_del_init(&w->entry); | |
479 | return w; | |
480 | } | |
481 | ||
355b0502 GKH |
482 | static void |
483 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer); | |
7a4408c6 TK |
484 | static void binder_free_thread(struct binder_thread *thread); |
485 | static void binder_free_proc(struct binder_proc *proc); | |
da0fa9e4 | 486 | static void binder_inc_node_tmpref_ilocked(struct binder_node *node); |
355b0502 | 487 | |
1b77e9dc MC |
488 | static bool binder_has_work_ilocked(struct binder_thread *thread, |
489 | bool do_proc_work) | |
490 | { | |
148ade2c | 491 | return thread->process_todo || |
1b77e9dc MC |
492 | thread->looper_need_return || |
493 | (do_proc_work && | |
494 | !binder_worklist_empty_ilocked(&thread->proc->todo)); | |
495 | } | |
496 | ||
497 | static bool binder_has_work(struct binder_thread *thread, bool do_proc_work) | |
498 | { | |
499 | bool has_work; | |
500 | ||
501 | binder_inner_proc_lock(thread->proc); | |
502 | has_work = binder_has_work_ilocked(thread, do_proc_work); | |
503 | binder_inner_proc_unlock(thread->proc); | |
504 | ||
505 | return has_work; | |
506 | } | |
507 | ||
508 | static bool binder_available_for_proc_work_ilocked(struct binder_thread *thread) | |
509 | { | |
510 | return !thread->transaction_stack && | |
511 | binder_worklist_empty_ilocked(&thread->todo) && | |
512 | (thread->looper & (BINDER_LOOPER_STATE_ENTERED | | |
513 | BINDER_LOOPER_STATE_REGISTERED)); | |
514 | } | |
515 | ||
516 | static void binder_wakeup_poll_threads_ilocked(struct binder_proc *proc, | |
517 | bool sync) | |
518 | { | |
519 | struct rb_node *n; | |
520 | struct binder_thread *thread; | |
521 | ||
522 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) { | |
523 | thread = rb_entry(n, struct binder_thread, rb_node); | |
524 | if (thread->looper & BINDER_LOOPER_STATE_POLL && | |
525 | binder_available_for_proc_work_ilocked(thread)) { | |
526 | if (sync) | |
527 | wake_up_interruptible_sync(&thread->wait); | |
528 | else | |
529 | wake_up_interruptible(&thread->wait); | |
530 | } | |
531 | } | |
532 | } | |
533 | ||
408c68b1 MC |
534 | /** |
535 | * binder_select_thread_ilocked() - selects a thread for doing proc work. | |
536 | * @proc: process to select a thread from | |
537 | * | |
538 | * Note that calling this function moves the thread off the waiting_threads | |
539 | * list, so it can only be woken up by the caller of this function, or a | |
540 | * signal. Therefore, callers *should* always wake up the thread this function | |
541 | * returns. | |
542 | * | |
543 | * Return: If there's a thread currently waiting for process work, | |
544 | * returns that thread. Otherwise returns NULL. | |
545 | */ | |
546 | static struct binder_thread * | |
547 | binder_select_thread_ilocked(struct binder_proc *proc) | |
1b77e9dc MC |
548 | { |
549 | struct binder_thread *thread; | |
550 | ||
858b2719 | 551 | assert_spin_locked(&proc->inner_lock); |
1b77e9dc MC |
552 | thread = list_first_entry_or_null(&proc->waiting_threads, |
553 | struct binder_thread, | |
554 | waiting_thread_node); | |
555 | ||
408c68b1 | 556 | if (thread) |
1b77e9dc | 557 | list_del_init(&thread->waiting_thread_node); |
408c68b1 MC |
558 | |
559 | return thread; | |
560 | } | |
561 | ||
562 | /** | |
563 | * binder_wakeup_thread_ilocked() - wakes up a thread for doing proc work. | |
564 | * @proc: process to wake up a thread in | |
565 | * @thread: specific thread to wake-up (may be NULL) | |
566 | * @sync: whether to do a synchronous wake-up | |
567 | * | |
568 | * This function wakes up a thread in the @proc process. | |
569 | * The caller may provide a specific thread to wake-up in | |
570 | * the @thread parameter. If @thread is NULL, this function | |
571 | * will wake up threads that have called poll(). | |
572 | * | |
573 | * Note that for this function to work as expected, callers | |
574 | * should first call binder_select_thread() to find a thread | |
575 | * to handle the work (if they don't have a thread already), | |
576 | * and pass the result into the @thread parameter. | |
577 | */ | |
578 | static void binder_wakeup_thread_ilocked(struct binder_proc *proc, | |
579 | struct binder_thread *thread, | |
580 | bool sync) | |
581 | { | |
858b2719 | 582 | assert_spin_locked(&proc->inner_lock); |
408c68b1 MC |
583 | |
584 | if (thread) { | |
1b77e9dc MC |
585 | if (sync) |
586 | wake_up_interruptible_sync(&thread->wait); | |
587 | else | |
588 | wake_up_interruptible(&thread->wait); | |
589 | return; | |
590 | } | |
591 | ||
592 | /* Didn't find a thread waiting for proc work; this can happen | |
593 | * in two scenarios: | |
594 | * 1. All threads are busy handling transactions | |
595 | * In that case, one of those threads should call back into | |
596 | * the kernel driver soon and pick up this work. | |
597 | * 2. Threads are using the (e)poll interface, in which case | |
598 | * they may be blocked on the waitqueue without having been | |
599 | * added to waiting_threads. For this case, we just iterate | |
600 | * over all threads not handling transaction work, and | |
601 | * wake them all up. We wake all because we don't know whether | |
602 | * a thread that called into (e)poll is handling non-binder | |
603 | * work currently. | |
604 | */ | |
605 | binder_wakeup_poll_threads_ilocked(proc, sync); | |
606 | } | |
607 | ||
408c68b1 MC |
608 | static void binder_wakeup_proc_ilocked(struct binder_proc *proc) |
609 | { | |
610 | struct binder_thread *thread = binder_select_thread_ilocked(proc); | |
611 | ||
612 | binder_wakeup_thread_ilocked(proc, thread, /* sync = */false); | |
613 | } | |
614 | ||
355b0502 GKH |
615 | static void binder_set_nice(long nice) |
616 | { | |
617 | long min_nice; | |
10f62861 | 618 | |
355b0502 GKH |
619 | if (can_nice(current, nice)) { |
620 | set_user_nice(current, nice); | |
621 | return; | |
622 | } | |
c3643b69 | 623 | min_nice = rlimit_to_nice(rlimit(RLIMIT_NICE)); |
355b0502 | 624 | binder_debug(BINDER_DEBUG_PRIORITY_CAP, |
56b468fc AS |
625 | "%d: nice value %ld not allowed use %ld instead\n", |
626 | current->pid, nice, min_nice); | |
355b0502 | 627 | set_user_nice(current, min_nice); |
8698a745 | 628 | if (min_nice <= MAX_NICE) |
355b0502 | 629 | return; |
56b468fc | 630 | binder_user_error("%d RLIMIT_NICE not set\n", current->pid); |
355b0502 GKH |
631 | } |
632 | ||
da0fa9e4 TK |
633 | static struct binder_node *binder_get_node_ilocked(struct binder_proc *proc, |
634 | binder_uintptr_t ptr) | |
355b0502 GKH |
635 | { |
636 | struct rb_node *n = proc->nodes.rb_node; | |
637 | struct binder_node *node; | |
638 | ||
858b2719 | 639 | assert_spin_locked(&proc->inner_lock); |
da0fa9e4 | 640 | |
355b0502 GKH |
641 | while (n) { |
642 | node = rb_entry(n, struct binder_node, rb_node); | |
643 | ||
644 | if (ptr < node->ptr) | |
645 | n = n->rb_left; | |
646 | else if (ptr > node->ptr) | |
647 | n = n->rb_right; | |
adc18842 TK |
648 | else { |
649 | /* | |
650 | * take an implicit weak reference | |
651 | * to ensure node stays alive until | |
652 | * call to binder_put_node() | |
653 | */ | |
da0fa9e4 | 654 | binder_inc_node_tmpref_ilocked(node); |
355b0502 | 655 | return node; |
adc18842 | 656 | } |
355b0502 GKH |
657 | } |
658 | return NULL; | |
659 | } | |
660 | ||
da0fa9e4 TK |
661 | static struct binder_node *binder_get_node(struct binder_proc *proc, |
662 | binder_uintptr_t ptr) | |
663 | { | |
664 | struct binder_node *node; | |
665 | ||
666 | binder_inner_proc_lock(proc); | |
667 | node = binder_get_node_ilocked(proc, ptr); | |
668 | binder_inner_proc_unlock(proc); | |
669 | return node; | |
670 | } | |
671 | ||
672 | static struct binder_node *binder_init_node_ilocked( | |
673 | struct binder_proc *proc, | |
674 | struct binder_node *new_node, | |
675 | struct flat_binder_object *fp) | |
355b0502 GKH |
676 | { |
677 | struct rb_node **p = &proc->nodes.rb_node; | |
678 | struct rb_node *parent = NULL; | |
679 | struct binder_node *node; | |
673068ee TK |
680 | binder_uintptr_t ptr = fp ? fp->binder : 0; |
681 | binder_uintptr_t cookie = fp ? fp->cookie : 0; | |
682 | __u32 flags = fp ? fp->flags : 0; | |
355b0502 | 683 | |
858b2719 MC |
684 | assert_spin_locked(&proc->inner_lock); |
685 | ||
355b0502 | 686 | while (*p) { |
da0fa9e4 | 687 | |
355b0502 GKH |
688 | parent = *p; |
689 | node = rb_entry(parent, struct binder_node, rb_node); | |
690 | ||
691 | if (ptr < node->ptr) | |
692 | p = &(*p)->rb_left; | |
693 | else if (ptr > node->ptr) | |
694 | p = &(*p)->rb_right; | |
da0fa9e4 TK |
695 | else { |
696 | /* | |
697 | * A matching node is already in | |
698 | * the rb tree. Abandon the init | |
699 | * and return it. | |
700 | */ | |
701 | binder_inc_node_tmpref_ilocked(node); | |
702 | return node; | |
703 | } | |
355b0502 | 704 | } |
da0fa9e4 | 705 | node = new_node; |
355b0502 | 706 | binder_stats_created(BINDER_STAT_NODE); |
adc18842 | 707 | node->tmp_refs++; |
355b0502 GKH |
708 | rb_link_node(&node->rb_node, parent, p); |
709 | rb_insert_color(&node->rb_node, &proc->nodes); | |
656a800a | 710 | node->debug_id = atomic_inc_return(&binder_last_id); |
355b0502 GKH |
711 | node->proc = proc; |
712 | node->ptr = ptr; | |
713 | node->cookie = cookie; | |
714 | node->work.type = BINDER_WORK_NODE; | |
673068ee TK |
715 | node->min_priority = flags & FLAT_BINDER_FLAG_PRIORITY_MASK; |
716 | node->accept_fds = !!(flags & FLAT_BINDER_FLAG_ACCEPTS_FDS); | |
ec74136d | 717 | node->txn_security_ctx = !!(flags & FLAT_BINDER_FLAG_TXN_SECURITY_CTX); |
9630fe88 | 718 | spin_lock_init(&node->lock); |
355b0502 GKH |
719 | INIT_LIST_HEAD(&node->work.entry); |
720 | INIT_LIST_HEAD(&node->async_todo); | |
721 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
da49889d | 722 | "%d:%d node %d u%016llx c%016llx created\n", |
355b0502 | 723 | proc->pid, current->pid, node->debug_id, |
da49889d | 724 | (u64)node->ptr, (u64)node->cookie); |
da0fa9e4 TK |
725 | |
726 | return node; | |
727 | } | |
728 | ||
729 | static struct binder_node *binder_new_node(struct binder_proc *proc, | |
730 | struct flat_binder_object *fp) | |
731 | { | |
732 | struct binder_node *node; | |
733 | struct binder_node *new_node = kzalloc(sizeof(*node), GFP_KERNEL); | |
734 | ||
735 | if (!new_node) | |
736 | return NULL; | |
737 | binder_inner_proc_lock(proc); | |
738 | node = binder_init_node_ilocked(proc, new_node, fp); | |
739 | binder_inner_proc_unlock(proc); | |
740 | if (node != new_node) | |
741 | /* | |
742 | * The node was already added by another thread | |
743 | */ | |
744 | kfree(new_node); | |
745 | ||
355b0502 GKH |
746 | return node; |
747 | } | |
748 | ||
ed29721e | 749 | static void binder_free_node(struct binder_node *node) |
355b0502 | 750 | { |
ed29721e TK |
751 | kfree(node); |
752 | binder_stats_deleted(BINDER_STAT_NODE); | |
753 | } | |
754 | ||
673068ee TK |
755 | static int binder_inc_node_nilocked(struct binder_node *node, int strong, |
756 | int internal, | |
757 | struct list_head *target_list) | |
ed29721e | 758 | { |
673068ee TK |
759 | struct binder_proc *proc = node->proc; |
760 | ||
858b2719 | 761 | assert_spin_locked(&node->lock); |
673068ee | 762 | if (proc) |
858b2719 | 763 | assert_spin_locked(&proc->inner_lock); |
355b0502 GKH |
764 | if (strong) { |
765 | if (internal) { | |
766 | if (target_list == NULL && | |
767 | node->internal_strong_refs == 0 && | |
342e5c90 MC |
768 | !(node->proc && |
769 | node == node->proc->context->binder_context_mgr_node && | |
770 | node->has_strong_ref)) { | |
56b468fc AS |
771 | pr_err("invalid inc strong node for %d\n", |
772 | node->debug_id); | |
355b0502 GKH |
773 | return -EINVAL; |
774 | } | |
775 | node->internal_strong_refs++; | |
776 | } else | |
777 | node->local_strong_refs++; | |
778 | if (!node->has_strong_ref && target_list) { | |
44b73962 SY |
779 | struct binder_thread *thread = container_of(target_list, |
780 | struct binder_thread, todo); | |
72196393 | 781 | binder_dequeue_work_ilocked(&node->work); |
44b73962 SY |
782 | BUG_ON(&thread->todo != target_list); |
783 | binder_enqueue_deferred_thread_work_ilocked(thread, | |
784 | &node->work); | |
355b0502 GKH |
785 | } |
786 | } else { | |
787 | if (!internal) | |
788 | node->local_weak_refs++; | |
789 | if (!node->has_weak_ref && list_empty(&node->work.entry)) { | |
790 | if (target_list == NULL) { | |
56b468fc AS |
791 | pr_err("invalid inc weak node for %d\n", |
792 | node->debug_id); | |
355b0502 GKH |
793 | return -EINVAL; |
794 | } | |
148ade2c MC |
795 | /* |
796 | * See comment above | |
797 | */ | |
72196393 | 798 | binder_enqueue_work_ilocked(&node->work, target_list); |
355b0502 GKH |
799 | } |
800 | } | |
801 | return 0; | |
802 | } | |
803 | ||
ed29721e TK |
804 | static int binder_inc_node(struct binder_node *node, int strong, int internal, |
805 | struct list_head *target_list) | |
806 | { | |
807 | int ret; | |
808 | ||
673068ee TK |
809 | binder_node_inner_lock(node); |
810 | ret = binder_inc_node_nilocked(node, strong, internal, target_list); | |
811 | binder_node_inner_unlock(node); | |
ed29721e TK |
812 | |
813 | return ret; | |
814 | } | |
815 | ||
673068ee TK |
816 | static bool binder_dec_node_nilocked(struct binder_node *node, |
817 | int strong, int internal) | |
355b0502 | 818 | { |
ed29721e TK |
819 | struct binder_proc *proc = node->proc; |
820 | ||
858b2719 | 821 | assert_spin_locked(&node->lock); |
ed29721e | 822 | if (proc) |
858b2719 | 823 | assert_spin_locked(&proc->inner_lock); |
355b0502 GKH |
824 | if (strong) { |
825 | if (internal) | |
826 | node->internal_strong_refs--; | |
827 | else | |
828 | node->local_strong_refs--; | |
829 | if (node->local_strong_refs || node->internal_strong_refs) | |
ed29721e | 830 | return false; |
355b0502 GKH |
831 | } else { |
832 | if (!internal) | |
833 | node->local_weak_refs--; | |
adc18842 TK |
834 | if (node->local_weak_refs || node->tmp_refs || |
835 | !hlist_empty(&node->refs)) | |
ed29721e | 836 | return false; |
355b0502 | 837 | } |
ed29721e TK |
838 | |
839 | if (proc && (node->has_strong_ref || node->has_weak_ref)) { | |
355b0502 | 840 | if (list_empty(&node->work.entry)) { |
72196393 | 841 | binder_enqueue_work_ilocked(&node->work, &proc->todo); |
408c68b1 | 842 | binder_wakeup_proc_ilocked(proc); |
355b0502 GKH |
843 | } |
844 | } else { | |
845 | if (hlist_empty(&node->refs) && !node->local_strong_refs && | |
adc18842 | 846 | !node->local_weak_refs && !node->tmp_refs) { |
ed29721e | 847 | if (proc) { |
72196393 TK |
848 | binder_dequeue_work_ilocked(&node->work); |
849 | rb_erase(&node->rb_node, &proc->nodes); | |
355b0502 | 850 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
56b468fc | 851 | "refless node %d deleted\n", |
355b0502 GKH |
852 | node->debug_id); |
853 | } else { | |
72196393 | 854 | BUG_ON(!list_empty(&node->work.entry)); |
c44b1231 | 855 | spin_lock(&binder_dead_nodes_lock); |
ed29721e TK |
856 | /* |
857 | * tmp_refs could have changed so | |
858 | * check it again | |
859 | */ | |
860 | if (node->tmp_refs) { | |
861 | spin_unlock(&binder_dead_nodes_lock); | |
862 | return false; | |
863 | } | |
355b0502 | 864 | hlist_del(&node->dead_node); |
c44b1231 | 865 | spin_unlock(&binder_dead_nodes_lock); |
355b0502 | 866 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
56b468fc | 867 | "dead node %d deleted\n", |
355b0502 GKH |
868 | node->debug_id); |
869 | } | |
ed29721e | 870 | return true; |
355b0502 GKH |
871 | } |
872 | } | |
ed29721e TK |
873 | return false; |
874 | } | |
355b0502 | 875 | |
ed29721e TK |
876 | static void binder_dec_node(struct binder_node *node, int strong, int internal) |
877 | { | |
878 | bool free_node; | |
879 | ||
673068ee TK |
880 | binder_node_inner_lock(node); |
881 | free_node = binder_dec_node_nilocked(node, strong, internal); | |
882 | binder_node_inner_unlock(node); | |
ed29721e TK |
883 | if (free_node) |
884 | binder_free_node(node); | |
885 | } | |
886 | ||
887 | static void binder_inc_node_tmpref_ilocked(struct binder_node *node) | |
888 | { | |
889 | /* | |
890 | * No call to binder_inc_node() is needed since we | |
891 | * don't need to inform userspace of any changes to | |
892 | * tmp_refs | |
893 | */ | |
894 | node->tmp_refs++; | |
355b0502 GKH |
895 | } |
896 | ||
adc18842 TK |
897 | /** |
898 | * binder_inc_node_tmpref() - take a temporary reference on node | |
899 | * @node: node to reference | |
900 | * | |
901 | * Take reference on node to prevent the node from being freed | |
ed29721e TK |
902 | * while referenced only by a local variable. The inner lock is |
903 | * needed to serialize with the node work on the queue (which | |
904 | * isn't needed after the node is dead). If the node is dead | |
905 | * (node->proc is NULL), use binder_dead_nodes_lock to protect | |
906 | * node->tmp_refs against dead-node-only cases where the node | |
907 | * lock cannot be acquired (eg traversing the dead node list to | |
908 | * print nodes) | |
adc18842 TK |
909 | */ |
910 | static void binder_inc_node_tmpref(struct binder_node *node) | |
911 | { | |
673068ee | 912 | binder_node_lock(node); |
ed29721e TK |
913 | if (node->proc) |
914 | binder_inner_proc_lock(node->proc); | |
915 | else | |
916 | spin_lock(&binder_dead_nodes_lock); | |
917 | binder_inc_node_tmpref_ilocked(node); | |
918 | if (node->proc) | |
919 | binder_inner_proc_unlock(node->proc); | |
920 | else | |
921 | spin_unlock(&binder_dead_nodes_lock); | |
673068ee | 922 | binder_node_unlock(node); |
adc18842 TK |
923 | } |
924 | ||
925 | /** | |
926 | * binder_dec_node_tmpref() - remove a temporary reference on node | |
927 | * @node: node to reference | |
928 | * | |
929 | * Release temporary reference on node taken via binder_inc_node_tmpref() | |
930 | */ | |
931 | static void binder_dec_node_tmpref(struct binder_node *node) | |
932 | { | |
ed29721e TK |
933 | bool free_node; |
934 | ||
673068ee TK |
935 | binder_node_inner_lock(node); |
936 | if (!node->proc) | |
ed29721e | 937 | spin_lock(&binder_dead_nodes_lock); |
324fa64c TK |
938 | else |
939 | __acquire(&binder_dead_nodes_lock); | |
adc18842 TK |
940 | node->tmp_refs--; |
941 | BUG_ON(node->tmp_refs < 0); | |
ed29721e TK |
942 | if (!node->proc) |
943 | spin_unlock(&binder_dead_nodes_lock); | |
324fa64c TK |
944 | else |
945 | __release(&binder_dead_nodes_lock); | |
adc18842 TK |
946 | /* |
947 | * Call binder_dec_node() to check if all refcounts are 0 | |
948 | * and cleanup is needed. Calling with strong=0 and internal=1 | |
949 | * causes no actual reference to be released in binder_dec_node(). | |
950 | * If that changes, a change is needed here too. | |
951 | */ | |
673068ee TK |
952 | free_node = binder_dec_node_nilocked(node, 0, 1); |
953 | binder_node_inner_unlock(node); | |
ed29721e TK |
954 | if (free_node) |
955 | binder_free_node(node); | |
adc18842 TK |
956 | } |
957 | ||
958 | static void binder_put_node(struct binder_node *node) | |
959 | { | |
960 | binder_dec_node_tmpref(node); | |
961 | } | |
355b0502 | 962 | |
2c1838dc TK |
963 | static struct binder_ref *binder_get_ref_olocked(struct binder_proc *proc, |
964 | u32 desc, bool need_strong_ref) | |
355b0502 GKH |
965 | { |
966 | struct rb_node *n = proc->refs_by_desc.rb_node; | |
967 | struct binder_ref *ref; | |
968 | ||
969 | while (n) { | |
970 | ref = rb_entry(n, struct binder_ref, rb_node_desc); | |
971 | ||
372e3147 | 972 | if (desc < ref->data.desc) { |
355b0502 | 973 | n = n->rb_left; |
372e3147 | 974 | } else if (desc > ref->data.desc) { |
355b0502 | 975 | n = n->rb_right; |
372e3147 | 976 | } else if (need_strong_ref && !ref->data.strong) { |
0a3ffab9 AH |
977 | binder_user_error("tried to use weak ref as strong ref\n"); |
978 | return NULL; | |
979 | } else { | |
355b0502 | 980 | return ref; |
0a3ffab9 | 981 | } |
355b0502 GKH |
982 | } |
983 | return NULL; | |
984 | } | |
985 | ||
372e3147 | 986 | /** |
2c1838dc | 987 | * binder_get_ref_for_node_olocked() - get the ref associated with given node |
372e3147 TK |
988 | * @proc: binder_proc that owns the ref |
989 | * @node: binder_node of target | |
990 | * @new_ref: newly allocated binder_ref to be initialized or %NULL | |
991 | * | |
992 | * Look up the ref for the given node and return it if it exists | |
993 | * | |
994 | * If it doesn't exist and the caller provides a newly allocated | |
995 | * ref, initialize the fields of the newly allocated ref and insert | |
996 | * into the given proc rb_trees and node refs list. | |
997 | * | |
998 | * Return: the ref for node. It is possible that another thread | |
999 | * allocated/initialized the ref first in which case the | |
1000 | * returned ref would be different than the passed-in | |
1001 | * new_ref. new_ref must be kfree'd by the caller in | |
1002 | * this case. | |
1003 | */ | |
2c1838dc TK |
1004 | static struct binder_ref *binder_get_ref_for_node_olocked( |
1005 | struct binder_proc *proc, | |
1006 | struct binder_node *node, | |
1007 | struct binder_ref *new_ref) | |
355b0502 | 1008 | { |
372e3147 | 1009 | struct binder_context *context = proc->context; |
355b0502 GKH |
1010 | struct rb_node **p = &proc->refs_by_node.rb_node; |
1011 | struct rb_node *parent = NULL; | |
372e3147 TK |
1012 | struct binder_ref *ref; |
1013 | struct rb_node *n; | |
355b0502 GKH |
1014 | |
1015 | while (*p) { | |
1016 | parent = *p; | |
1017 | ref = rb_entry(parent, struct binder_ref, rb_node_node); | |
1018 | ||
1019 | if (node < ref->node) | |
1020 | p = &(*p)->rb_left; | |
1021 | else if (node > ref->node) | |
1022 | p = &(*p)->rb_right; | |
1023 | else | |
1024 | return ref; | |
1025 | } | |
372e3147 | 1026 | if (!new_ref) |
355b0502 | 1027 | return NULL; |
372e3147 | 1028 | |
355b0502 | 1029 | binder_stats_created(BINDER_STAT_REF); |
372e3147 | 1030 | new_ref->data.debug_id = atomic_inc_return(&binder_last_id); |
355b0502 GKH |
1031 | new_ref->proc = proc; |
1032 | new_ref->node = node; | |
1033 | rb_link_node(&new_ref->rb_node_node, parent, p); | |
1034 | rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node); | |
1035 | ||
372e3147 | 1036 | new_ref->data.desc = (node == context->binder_context_mgr_node) ? 0 : 1; |
355b0502 GKH |
1037 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
1038 | ref = rb_entry(n, struct binder_ref, rb_node_desc); | |
372e3147 | 1039 | if (ref->data.desc > new_ref->data.desc) |
355b0502 | 1040 | break; |
372e3147 | 1041 | new_ref->data.desc = ref->data.desc + 1; |
355b0502 GKH |
1042 | } |
1043 | ||
1044 | p = &proc->refs_by_desc.rb_node; | |
1045 | while (*p) { | |
1046 | parent = *p; | |
1047 | ref = rb_entry(parent, struct binder_ref, rb_node_desc); | |
1048 | ||
372e3147 | 1049 | if (new_ref->data.desc < ref->data.desc) |
355b0502 | 1050 | p = &(*p)->rb_left; |
372e3147 | 1051 | else if (new_ref->data.desc > ref->data.desc) |
355b0502 GKH |
1052 | p = &(*p)->rb_right; |
1053 | else | |
1054 | BUG(); | |
1055 | } | |
1056 | rb_link_node(&new_ref->rb_node_desc, parent, p); | |
1057 | rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc); | |
673068ee TK |
1058 | |
1059 | binder_node_lock(node); | |
e4cffcf4 | 1060 | hlist_add_head(&new_ref->node_entry, &node->refs); |
355b0502 | 1061 | |
e4cffcf4 TK |
1062 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
1063 | "%d new ref %d desc %d for node %d\n", | |
372e3147 | 1064 | proc->pid, new_ref->data.debug_id, new_ref->data.desc, |
e4cffcf4 | 1065 | node->debug_id); |
673068ee | 1066 | binder_node_unlock(node); |
355b0502 GKH |
1067 | return new_ref; |
1068 | } | |
1069 | ||
2c1838dc | 1070 | static void binder_cleanup_ref_olocked(struct binder_ref *ref) |
355b0502 | 1071 | { |
ed29721e | 1072 | bool delete_node = false; |
ed29721e | 1073 | |
355b0502 | 1074 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
56b468fc | 1075 | "%d delete ref %d desc %d for node %d\n", |
372e3147 | 1076 | ref->proc->pid, ref->data.debug_id, ref->data.desc, |
56b468fc | 1077 | ref->node->debug_id); |
355b0502 GKH |
1078 | |
1079 | rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc); | |
1080 | rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node); | |
372e3147 | 1081 | |
673068ee | 1082 | binder_node_inner_lock(ref->node); |
372e3147 | 1083 | if (ref->data.strong) |
673068ee | 1084 | binder_dec_node_nilocked(ref->node, 1, 1); |
372e3147 | 1085 | |
355b0502 | 1086 | hlist_del(&ref->node_entry); |
673068ee TK |
1087 | delete_node = binder_dec_node_nilocked(ref->node, 0, 1); |
1088 | binder_node_inner_unlock(ref->node); | |
ed29721e TK |
1089 | /* |
1090 | * Clear ref->node unless we want the caller to free the node | |
1091 | */ | |
1092 | if (!delete_node) { | |
1093 | /* | |
1094 | * The caller uses ref->node to determine | |
1095 | * whether the node needs to be freed. Clear | |
1096 | * it since the node is still alive. | |
1097 | */ | |
1098 | ref->node = NULL; | |
1099 | } | |
372e3147 | 1100 | |
355b0502 GKH |
1101 | if (ref->death) { |
1102 | binder_debug(BINDER_DEBUG_DEAD_BINDER, | |
56b468fc | 1103 | "%d delete ref %d desc %d has death notification\n", |
372e3147 TK |
1104 | ref->proc->pid, ref->data.debug_id, |
1105 | ref->data.desc); | |
72196393 | 1106 | binder_dequeue_work(ref->proc, &ref->death->work); |
355b0502 GKH |
1107 | binder_stats_deleted(BINDER_STAT_DEATH); |
1108 | } | |
355b0502 GKH |
1109 | binder_stats_deleted(BINDER_STAT_REF); |
1110 | } | |
1111 | ||
372e3147 | 1112 | /** |
2c1838dc | 1113 | * binder_inc_ref_olocked() - increment the ref for given handle |
372e3147 TK |
1114 | * @ref: ref to be incremented |
1115 | * @strong: if true, strong increment, else weak | |
1116 | * @target_list: list to queue node work on | |
1117 | * | |
2c1838dc | 1118 | * Increment the ref. @ref->proc->outer_lock must be held on entry |
372e3147 TK |
1119 | * |
1120 | * Return: 0, if successful, else errno | |
1121 | */ | |
2c1838dc TK |
1122 | static int binder_inc_ref_olocked(struct binder_ref *ref, int strong, |
1123 | struct list_head *target_list) | |
355b0502 GKH |
1124 | { |
1125 | int ret; | |
10f62861 | 1126 | |
355b0502 | 1127 | if (strong) { |
372e3147 | 1128 | if (ref->data.strong == 0) { |
355b0502 GKH |
1129 | ret = binder_inc_node(ref->node, 1, 1, target_list); |
1130 | if (ret) | |
1131 | return ret; | |
1132 | } | |
372e3147 | 1133 | ref->data.strong++; |
355b0502 | 1134 | } else { |
372e3147 | 1135 | if (ref->data.weak == 0) { |
355b0502 GKH |
1136 | ret = binder_inc_node(ref->node, 0, 1, target_list); |
1137 | if (ret) | |
1138 | return ret; | |
1139 | } | |
372e3147 | 1140 | ref->data.weak++; |
355b0502 GKH |
1141 | } |
1142 | return 0; | |
1143 | } | |
1144 | ||
372e3147 TK |
1145 | /** |
1146 | * binder_dec_ref() - dec the ref for given handle | |
1147 | * @ref: ref to be decremented | |
1148 | * @strong: if true, strong decrement, else weak | |
1149 | * | |
1150 | * Decrement the ref. | |
1151 | * | |
372e3147 TK |
1152 | * Return: true if ref is cleaned up and ready to be freed |
1153 | */ | |
2c1838dc | 1154 | static bool binder_dec_ref_olocked(struct binder_ref *ref, int strong) |
355b0502 GKH |
1155 | { |
1156 | if (strong) { | |
372e3147 | 1157 | if (ref->data.strong == 0) { |
56b468fc | 1158 | binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n", |
372e3147 TK |
1159 | ref->proc->pid, ref->data.debug_id, |
1160 | ref->data.desc, ref->data.strong, | |
1161 | ref->data.weak); | |
1162 | return false; | |
355b0502 | 1163 | } |
372e3147 | 1164 | ref->data.strong--; |
ed29721e TK |
1165 | if (ref->data.strong == 0) |
1166 | binder_dec_node(ref->node, strong, 1); | |
355b0502 | 1167 | } else { |
372e3147 | 1168 | if (ref->data.weak == 0) { |
56b468fc | 1169 | binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n", |
372e3147 TK |
1170 | ref->proc->pid, ref->data.debug_id, |
1171 | ref->data.desc, ref->data.strong, | |
1172 | ref->data.weak); | |
1173 | return false; | |
355b0502 | 1174 | } |
372e3147 | 1175 | ref->data.weak--; |
355b0502 | 1176 | } |
372e3147 | 1177 | if (ref->data.strong == 0 && ref->data.weak == 0) { |
2c1838dc | 1178 | binder_cleanup_ref_olocked(ref); |
372e3147 TK |
1179 | return true; |
1180 | } | |
1181 | return false; | |
1182 | } | |
1183 | ||
1184 | /** | |
1185 | * binder_get_node_from_ref() - get the node from the given proc/desc | |
1186 | * @proc: proc containing the ref | |
1187 | * @desc: the handle associated with the ref | |
1188 | * @need_strong_ref: if true, only return node if ref is strong | |
1189 | * @rdata: the id/refcount data for the ref | |
1190 | * | |
1191 | * Given a proc and ref handle, return the associated binder_node | |
1192 | * | |
1193 | * Return: a binder_node or NULL if not found or not strong when strong required | |
1194 | */ | |
1195 | static struct binder_node *binder_get_node_from_ref( | |
1196 | struct binder_proc *proc, | |
1197 | u32 desc, bool need_strong_ref, | |
1198 | struct binder_ref_data *rdata) | |
1199 | { | |
1200 | struct binder_node *node; | |
1201 | struct binder_ref *ref; | |
1202 | ||
2c1838dc TK |
1203 | binder_proc_lock(proc); |
1204 | ref = binder_get_ref_olocked(proc, desc, need_strong_ref); | |
372e3147 TK |
1205 | if (!ref) |
1206 | goto err_no_ref; | |
1207 | node = ref->node; | |
adc18842 TK |
1208 | /* |
1209 | * Take an implicit reference on the node to ensure | |
1210 | * it stays alive until the call to binder_put_node() | |
1211 | */ | |
1212 | binder_inc_node_tmpref(node); | |
372e3147 TK |
1213 | if (rdata) |
1214 | *rdata = ref->data; | |
2c1838dc | 1215 | binder_proc_unlock(proc); |
372e3147 TK |
1216 | |
1217 | return node; | |
1218 | ||
1219 | err_no_ref: | |
2c1838dc | 1220 | binder_proc_unlock(proc); |
372e3147 TK |
1221 | return NULL; |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * binder_free_ref() - free the binder_ref | |
1226 | * @ref: ref to free | |
1227 | * | |
ed29721e TK |
1228 | * Free the binder_ref. Free the binder_node indicated by ref->node |
1229 | * (if non-NULL) and the binder_ref_death indicated by ref->death. | |
372e3147 TK |
1230 | */ |
1231 | static void binder_free_ref(struct binder_ref *ref) | |
1232 | { | |
ed29721e TK |
1233 | if (ref->node) |
1234 | binder_free_node(ref->node); | |
372e3147 TK |
1235 | kfree(ref->death); |
1236 | kfree(ref); | |
1237 | } | |
1238 | ||
1239 | /** | |
1240 | * binder_update_ref_for_handle() - inc/dec the ref for given handle | |
1241 | * @proc: proc containing the ref | |
1242 | * @desc: the handle associated with the ref | |
1243 | * @increment: true=inc reference, false=dec reference | |
1244 | * @strong: true=strong reference, false=weak reference | |
1245 | * @rdata: the id/refcount data for the ref | |
1246 | * | |
1247 | * Given a proc and ref handle, increment or decrement the ref | |
1248 | * according to "increment" arg. | |
1249 | * | |
1250 | * Return: 0 if successful, else errno | |
1251 | */ | |
1252 | static int binder_update_ref_for_handle(struct binder_proc *proc, | |
1253 | uint32_t desc, bool increment, bool strong, | |
1254 | struct binder_ref_data *rdata) | |
1255 | { | |
1256 | int ret = 0; | |
1257 | struct binder_ref *ref; | |
1258 | bool delete_ref = false; | |
1259 | ||
2c1838dc TK |
1260 | binder_proc_lock(proc); |
1261 | ref = binder_get_ref_olocked(proc, desc, strong); | |
372e3147 TK |
1262 | if (!ref) { |
1263 | ret = -EINVAL; | |
1264 | goto err_no_ref; | |
1265 | } | |
1266 | if (increment) | |
2c1838dc | 1267 | ret = binder_inc_ref_olocked(ref, strong, NULL); |
372e3147 | 1268 | else |
2c1838dc | 1269 | delete_ref = binder_dec_ref_olocked(ref, strong); |
372e3147 TK |
1270 | |
1271 | if (rdata) | |
1272 | *rdata = ref->data; | |
2c1838dc | 1273 | binder_proc_unlock(proc); |
372e3147 TK |
1274 | |
1275 | if (delete_ref) | |
1276 | binder_free_ref(ref); | |
1277 | return ret; | |
1278 | ||
1279 | err_no_ref: | |
2c1838dc | 1280 | binder_proc_unlock(proc); |
372e3147 TK |
1281 | return ret; |
1282 | } | |
1283 | ||
1284 | /** | |
1285 | * binder_dec_ref_for_handle() - dec the ref for given handle | |
1286 | * @proc: proc containing the ref | |
1287 | * @desc: the handle associated with the ref | |
1288 | * @strong: true=strong reference, false=weak reference | |
1289 | * @rdata: the id/refcount data for the ref | |
1290 | * | |
1291 | * Just calls binder_update_ref_for_handle() to decrement the ref. | |
1292 | * | |
1293 | * Return: 0 if successful, else errno | |
1294 | */ | |
1295 | static int binder_dec_ref_for_handle(struct binder_proc *proc, | |
1296 | uint32_t desc, bool strong, struct binder_ref_data *rdata) | |
1297 | { | |
1298 | return binder_update_ref_for_handle(proc, desc, false, strong, rdata); | |
1299 | } | |
1300 | ||
1301 | ||
1302 | /** | |
1303 | * binder_inc_ref_for_node() - increment the ref for given proc/node | |
1304 | * @proc: proc containing the ref | |
1305 | * @node: target node | |
1306 | * @strong: true=strong reference, false=weak reference | |
1307 | * @target_list: worklist to use if node is incremented | |
1308 | * @rdata: the id/refcount data for the ref | |
1309 | * | |
1310 | * Given a proc and node, increment the ref. Create the ref if it | |
1311 | * doesn't already exist | |
1312 | * | |
1313 | * Return: 0 if successful, else errno | |
1314 | */ | |
1315 | static int binder_inc_ref_for_node(struct binder_proc *proc, | |
1316 | struct binder_node *node, | |
1317 | bool strong, | |
1318 | struct list_head *target_list, | |
1319 | struct binder_ref_data *rdata) | |
1320 | { | |
1321 | struct binder_ref *ref; | |
1322 | struct binder_ref *new_ref = NULL; | |
1323 | int ret = 0; | |
1324 | ||
2c1838dc TK |
1325 | binder_proc_lock(proc); |
1326 | ref = binder_get_ref_for_node_olocked(proc, node, NULL); | |
372e3147 | 1327 | if (!ref) { |
2c1838dc | 1328 | binder_proc_unlock(proc); |
372e3147 TK |
1329 | new_ref = kzalloc(sizeof(*ref), GFP_KERNEL); |
1330 | if (!new_ref) | |
1331 | return -ENOMEM; | |
2c1838dc TK |
1332 | binder_proc_lock(proc); |
1333 | ref = binder_get_ref_for_node_olocked(proc, node, new_ref); | |
372e3147 | 1334 | } |
2c1838dc | 1335 | ret = binder_inc_ref_olocked(ref, strong, target_list); |
372e3147 | 1336 | *rdata = ref->data; |
2c1838dc | 1337 | binder_proc_unlock(proc); |
372e3147 TK |
1338 | if (new_ref && ref != new_ref) |
1339 | /* | |
1340 | * Another thread created the ref first so | |
1341 | * free the one we allocated | |
1342 | */ | |
1343 | kfree(new_ref); | |
1344 | return ret; | |
355b0502 GKH |
1345 | } |
1346 | ||
0b89d69a MC |
1347 | static void binder_pop_transaction_ilocked(struct binder_thread *target_thread, |
1348 | struct binder_transaction *t) | |
355b0502 | 1349 | { |
b6d282ce | 1350 | BUG_ON(!target_thread); |
858b2719 | 1351 | assert_spin_locked(&target_thread->proc->inner_lock); |
b6d282ce TK |
1352 | BUG_ON(target_thread->transaction_stack != t); |
1353 | BUG_ON(target_thread->transaction_stack->from != target_thread); | |
1354 | target_thread->transaction_stack = | |
1355 | target_thread->transaction_stack->from_parent; | |
1356 | t->from = NULL; | |
1357 | } | |
1358 | ||
7a4408c6 TK |
1359 | /** |
1360 | * binder_thread_dec_tmpref() - decrement thread->tmp_ref | |
1361 | * @thread: thread to decrement | |
1362 | * | |
1363 | * A thread needs to be kept alive while being used to create or | |
1364 | * handle a transaction. binder_get_txn_from() is used to safely | |
1365 | * extract t->from from a binder_transaction and keep the thread | |
1366 | * indicated by t->from from being freed. When done with that | |
1367 | * binder_thread, this function is called to decrement the | |
1368 | * tmp_ref and free if appropriate (thread has been released | |
1369 | * and no transaction being processed by the driver) | |
1370 | */ | |
1371 | static void binder_thread_dec_tmpref(struct binder_thread *thread) | |
1372 | { | |
1373 | /* | |
1374 | * atomic is used to protect the counter value while | |
1375 | * it cannot reach zero or thread->is_dead is false | |
7a4408c6 | 1376 | */ |
7bd7b0e6 | 1377 | binder_inner_proc_lock(thread->proc); |
7a4408c6 TK |
1378 | atomic_dec(&thread->tmp_ref); |
1379 | if (thread->is_dead && !atomic_read(&thread->tmp_ref)) { | |
7bd7b0e6 | 1380 | binder_inner_proc_unlock(thread->proc); |
7a4408c6 TK |
1381 | binder_free_thread(thread); |
1382 | return; | |
1383 | } | |
7bd7b0e6 | 1384 | binder_inner_proc_unlock(thread->proc); |
7a4408c6 TK |
1385 | } |
1386 | ||
1387 | /** | |
1388 | * binder_proc_dec_tmpref() - decrement proc->tmp_ref | |
1389 | * @proc: proc to decrement | |
1390 | * | |
1391 | * A binder_proc needs to be kept alive while being used to create or | |
1392 | * handle a transaction. proc->tmp_ref is incremented when | |
1393 | * creating a new transaction or the binder_proc is currently in-use | |
1394 | * by threads that are being released. When done with the binder_proc, | |
1395 | * this function is called to decrement the counter and free the | |
1396 | * proc if appropriate (proc has been released, all threads have | |
1397 | * been released and not currenly in-use to process a transaction). | |
1398 | */ | |
1399 | static void binder_proc_dec_tmpref(struct binder_proc *proc) | |
1400 | { | |
7bd7b0e6 | 1401 | binder_inner_proc_lock(proc); |
7a4408c6 TK |
1402 | proc->tmp_ref--; |
1403 | if (proc->is_dead && RB_EMPTY_ROOT(&proc->threads) && | |
1404 | !proc->tmp_ref) { | |
7bd7b0e6 | 1405 | binder_inner_proc_unlock(proc); |
7a4408c6 TK |
1406 | binder_free_proc(proc); |
1407 | return; | |
1408 | } | |
7bd7b0e6 | 1409 | binder_inner_proc_unlock(proc); |
7a4408c6 TK |
1410 | } |
1411 | ||
1412 | /** | |
1413 | * binder_get_txn_from() - safely extract the "from" thread in transaction | |
1414 | * @t: binder transaction for t->from | |
1415 | * | |
1416 | * Atomically return the "from" thread and increment the tmp_ref | |
1417 | * count for the thread to ensure it stays alive until | |
1418 | * binder_thread_dec_tmpref() is called. | |
1419 | * | |
1420 | * Return: the value of t->from | |
1421 | */ | |
1422 | static struct binder_thread *binder_get_txn_from( | |
1423 | struct binder_transaction *t) | |
1424 | { | |
1425 | struct binder_thread *from; | |
1426 | ||
1427 | spin_lock(&t->lock); | |
1428 | from = t->from; | |
1429 | if (from) | |
1430 | atomic_inc(&from->tmp_ref); | |
1431 | spin_unlock(&t->lock); | |
1432 | return from; | |
1433 | } | |
1434 | ||
0b89d69a MC |
1435 | /** |
1436 | * binder_get_txn_from_and_acq_inner() - get t->from and acquire inner lock | |
1437 | * @t: binder transaction for t->from | |
1438 | * | |
1439 | * Same as binder_get_txn_from() except it also acquires the proc->inner_lock | |
1440 | * to guarantee that the thread cannot be released while operating on it. | |
1441 | * The caller must call binder_inner_proc_unlock() to release the inner lock | |
1442 | * as well as call binder_dec_thread_txn() to release the reference. | |
1443 | * | |
1444 | * Return: the value of t->from | |
1445 | */ | |
1446 | static struct binder_thread *binder_get_txn_from_and_acq_inner( | |
1447 | struct binder_transaction *t) | |
324fa64c | 1448 | __acquires(&t->from->proc->inner_lock) |
0b89d69a MC |
1449 | { |
1450 | struct binder_thread *from; | |
1451 | ||
1452 | from = binder_get_txn_from(t); | |
324fa64c TK |
1453 | if (!from) { |
1454 | __acquire(&from->proc->inner_lock); | |
0b89d69a | 1455 | return NULL; |
324fa64c | 1456 | } |
0b89d69a MC |
1457 | binder_inner_proc_lock(from->proc); |
1458 | if (t->from) { | |
1459 | BUG_ON(from != t->from); | |
1460 | return from; | |
1461 | } | |
1462 | binder_inner_proc_unlock(from->proc); | |
324fa64c | 1463 | __acquire(&from->proc->inner_lock); |
0b89d69a MC |
1464 | binder_thread_dec_tmpref(from); |
1465 | return NULL; | |
1466 | } | |
1467 | ||
44d8047f TK |
1468 | /** |
1469 | * binder_free_txn_fixups() - free unprocessed fd fixups | |
1470 | * @t: binder transaction for t->from | |
1471 | * | |
1472 | * If the transaction is being torn down prior to being | |
1473 | * processed by the target process, free all of the | |
1474 | * fd fixups and fput the file structs. It is safe to | |
1475 | * call this function after the fixups have been | |
1476 | * processed -- in that case, the list will be empty. | |
1477 | */ | |
1478 | static void binder_free_txn_fixups(struct binder_transaction *t) | |
1479 | { | |
1480 | struct binder_txn_fd_fixup *fixup, *tmp; | |
1481 | ||
1482 | list_for_each_entry_safe(fixup, tmp, &t->fd_fixups, fixup_entry) { | |
1483 | fput(fixup->file); | |
1484 | list_del(&fixup->fixup_entry); | |
1485 | kfree(fixup); | |
1486 | } | |
1487 | } | |
1488 | ||
1987f112 FC |
1489 | static void binder_txn_latency_free(struct binder_transaction *t) |
1490 | { | |
1491 | int from_proc, from_thread, to_proc, to_thread; | |
1492 | ||
1493 | spin_lock(&t->lock); | |
1494 | from_proc = t->from ? t->from->proc->pid : 0; | |
1495 | from_thread = t->from ? t->from->pid : 0; | |
1496 | to_proc = t->to_proc ? t->to_proc->pid : 0; | |
1497 | to_thread = t->to_thread ? t->to_thread->pid : 0; | |
1498 | spin_unlock(&t->lock); | |
1499 | ||
1500 | trace_binder_txn_latency_free(t, from_proc, from_thread, to_proc, to_thread); | |
1501 | } | |
1502 | ||
b6d282ce TK |
1503 | static void binder_free_transaction(struct binder_transaction *t) |
1504 | { | |
a370003c TK |
1505 | struct binder_proc *target_proc = t->to_proc; |
1506 | ||
1507 | if (target_proc) { | |
1508 | binder_inner_proc_lock(target_proc); | |
432ff1e9 MB |
1509 | target_proc->outstanding_txns--; |
1510 | if (target_proc->outstanding_txns < 0) | |
1511 | pr_warn("%s: Unexpected outstanding_txns %d\n", | |
1512 | __func__, target_proc->outstanding_txns); | |
1513 | if (!target_proc->outstanding_txns && target_proc->is_frozen) | |
1514 | wake_up_interruptible_all(&target_proc->freeze_wait); | |
a370003c TK |
1515 | if (t->buffer) |
1516 | t->buffer->transaction = NULL; | |
1517 | binder_inner_proc_unlock(target_proc); | |
1518 | } | |
1987f112 FC |
1519 | if (trace_binder_txn_latency_free_enabled()) |
1520 | binder_txn_latency_free(t); | |
a370003c TK |
1521 | /* |
1522 | * If the transaction has no target_proc, then | |
1523 | * t->buffer->transaction has already been cleared. | |
1524 | */ | |
44d8047f | 1525 | binder_free_txn_fixups(t); |
355b0502 GKH |
1526 | kfree(t); |
1527 | binder_stats_deleted(BINDER_STAT_TRANSACTION); | |
1528 | } | |
1529 | ||
1530 | static void binder_send_failed_reply(struct binder_transaction *t, | |
1531 | uint32_t error_code) | |
1532 | { | |
1533 | struct binder_thread *target_thread; | |
d4ec15e1 | 1534 | struct binder_transaction *next; |
10f62861 | 1535 | |
355b0502 GKH |
1536 | BUG_ON(t->flags & TF_ONE_WAY); |
1537 | while (1) { | |
0b89d69a | 1538 | target_thread = binder_get_txn_from_and_acq_inner(t); |
355b0502 | 1539 | if (target_thread) { |
26549d17 TK |
1540 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
1541 | "send failed reply for transaction %d to %d:%d\n", | |
1542 | t->debug_id, | |
1543 | target_thread->proc->pid, | |
1544 | target_thread->pid); | |
1545 | ||
0b89d69a | 1546 | binder_pop_transaction_ilocked(target_thread, t); |
26549d17 TK |
1547 | if (target_thread->reply_error.cmd == BR_OK) { |
1548 | target_thread->reply_error.cmd = error_code; | |
148ade2c MC |
1549 | binder_enqueue_thread_work_ilocked( |
1550 | target_thread, | |
1551 | &target_thread->reply_error.work); | |
355b0502 GKH |
1552 | wake_up_interruptible(&target_thread->wait); |
1553 | } else { | |
e46a3b3b TK |
1554 | /* |
1555 | * Cannot get here for normal operation, but | |
1556 | * we can if multiple synchronous transactions | |
1557 | * are sent without blocking for responses. | |
1558 | * Just ignore the 2nd error in this case. | |
1559 | */ | |
1560 | pr_warn("Unexpected reply error: %u\n", | |
1561 | target_thread->reply_error.cmd); | |
355b0502 | 1562 | } |
0b89d69a | 1563 | binder_inner_proc_unlock(target_thread->proc); |
7a4408c6 | 1564 | binder_thread_dec_tmpref(target_thread); |
26549d17 | 1565 | binder_free_transaction(t); |
355b0502 | 1566 | return; |
d4ec15e1 | 1567 | } |
72b93c79 | 1568 | __release(&target_thread->proc->inner_lock); |
d4ec15e1 LT |
1569 | next = t->from_parent; |
1570 | ||
1571 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, | |
1572 | "send failed reply for transaction %d, target dead\n", | |
1573 | t->debug_id); | |
1574 | ||
b6d282ce | 1575 | binder_free_transaction(t); |
d4ec15e1 | 1576 | if (next == NULL) { |
355b0502 | 1577 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
d4ec15e1 LT |
1578 | "reply failed, no target thread at root\n"); |
1579 | return; | |
355b0502 | 1580 | } |
d4ec15e1 LT |
1581 | t = next; |
1582 | binder_debug(BINDER_DEBUG_DEAD_BINDER, | |
1583 | "reply failed, no target thread -- retry %d\n", | |
1584 | t->debug_id); | |
355b0502 GKH |
1585 | } |
1586 | } | |
1587 | ||
fb2c4452 MC |
1588 | /** |
1589 | * binder_cleanup_transaction() - cleans up undelivered transaction | |
1590 | * @t: transaction that needs to be cleaned up | |
1591 | * @reason: reason the transaction wasn't delivered | |
1592 | * @error_code: error to return to caller (if synchronous call) | |
1593 | */ | |
1594 | static void binder_cleanup_transaction(struct binder_transaction *t, | |
1595 | const char *reason, | |
1596 | uint32_t error_code) | |
1597 | { | |
1598 | if (t->buffer->target_node && !(t->flags & TF_ONE_WAY)) { | |
1599 | binder_send_failed_reply(t, error_code); | |
1600 | } else { | |
1601 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, | |
1602 | "undelivered transaction %d, %s\n", | |
1603 | t->debug_id, reason); | |
1604 | binder_free_transaction(t); | |
1605 | } | |
1606 | } | |
1607 | ||
feba3900 | 1608 | /** |
7a67a393 TK |
1609 | * binder_get_object() - gets object and checks for valid metadata |
1610 | * @proc: binder_proc owning the buffer | |
feba3900 | 1611 | * @buffer: binder_buffer that we're parsing. |
7a67a393 TK |
1612 | * @offset: offset in the @buffer at which to validate an object. |
1613 | * @object: struct binder_object to read into | |
feba3900 MC |
1614 | * |
1615 | * Return: If there's a valid metadata object at @offset in @buffer, the | |
7a67a393 TK |
1616 | * size of that object. Otherwise, it returns zero. The object |
1617 | * is read into the struct binder_object pointed to by @object. | |
feba3900 | 1618 | */ |
7a67a393 TK |
1619 | static size_t binder_get_object(struct binder_proc *proc, |
1620 | struct binder_buffer *buffer, | |
1621 | unsigned long offset, | |
1622 | struct binder_object *object) | |
feba3900 | 1623 | { |
7a67a393 | 1624 | size_t read_size; |
feba3900 MC |
1625 | struct binder_object_header *hdr; |
1626 | size_t object_size = 0; | |
1627 | ||
7a67a393 | 1628 | read_size = min_t(size_t, sizeof(*object), buffer->data_size - offset); |
5997da82 | 1629 | if (offset > buffer->data_size || read_size < sizeof(*hdr) || |
bb4a2e48 TK |
1630 | binder_alloc_copy_from_buffer(&proc->alloc, object, buffer, |
1631 | offset, read_size)) | |
feba3900 MC |
1632 | return 0; |
1633 | ||
7a67a393 TK |
1634 | /* Ok, now see if we read a complete object. */ |
1635 | hdr = &object->hdr; | |
feba3900 MC |
1636 | switch (hdr->type) { |
1637 | case BINDER_TYPE_BINDER: | |
1638 | case BINDER_TYPE_WEAK_BINDER: | |
1639 | case BINDER_TYPE_HANDLE: | |
1640 | case BINDER_TYPE_WEAK_HANDLE: | |
1641 | object_size = sizeof(struct flat_binder_object); | |
1642 | break; | |
1643 | case BINDER_TYPE_FD: | |
1644 | object_size = sizeof(struct binder_fd_object); | |
1645 | break; | |
7980240b MC |
1646 | case BINDER_TYPE_PTR: |
1647 | object_size = sizeof(struct binder_buffer_object); | |
1648 | break; | |
def95c73 MC |
1649 | case BINDER_TYPE_FDA: |
1650 | object_size = sizeof(struct binder_fd_array_object); | |
1651 | break; | |
feba3900 MC |
1652 | default: |
1653 | return 0; | |
1654 | } | |
1655 | if (offset <= buffer->data_size - object_size && | |
1656 | buffer->data_size >= object_size) | |
1657 | return object_size; | |
1658 | else | |
1659 | return 0; | |
1660 | } | |
1661 | ||
7980240b MC |
1662 | /** |
1663 | * binder_validate_ptr() - validates binder_buffer_object in a binder_buffer. | |
db6b0b81 | 1664 | * @proc: binder_proc owning the buffer |
7980240b | 1665 | * @b: binder_buffer containing the object |
db6b0b81 | 1666 | * @object: struct binder_object to read into |
7980240b MC |
1667 | * @index: index in offset array at which the binder_buffer_object is |
1668 | * located | |
db6b0b81 TK |
1669 | * @start_offset: points to the start of the offset array |
1670 | * @object_offsetp: offset of @object read from @b | |
7980240b MC |
1671 | * @num_valid: the number of valid offsets in the offset array |
1672 | * | |
1673 | * Return: If @index is within the valid range of the offset array | |
1674 | * described by @start and @num_valid, and if there's a valid | |
1675 | * binder_buffer_object at the offset found in index @index | |
1676 | * of the offset array, that object is returned. Otherwise, | |
1677 | * %NULL is returned. | |
1678 | * Note that the offset found in index @index itself is not | |
1679 | * verified; this function assumes that @num_valid elements | |
1680 | * from @start were previously verified to have valid offsets. | |
db6b0b81 TK |
1681 | * If @object_offsetp is non-NULL, then the offset within |
1682 | * @b is written to it. | |
7980240b | 1683 | */ |
db6b0b81 TK |
1684 | static struct binder_buffer_object *binder_validate_ptr( |
1685 | struct binder_proc *proc, | |
1686 | struct binder_buffer *b, | |
1687 | struct binder_object *object, | |
1688 | binder_size_t index, | |
1689 | binder_size_t start_offset, | |
1690 | binder_size_t *object_offsetp, | |
1691 | binder_size_t num_valid) | |
7980240b | 1692 | { |
db6b0b81 TK |
1693 | size_t object_size; |
1694 | binder_size_t object_offset; | |
1695 | unsigned long buffer_offset; | |
7980240b MC |
1696 | |
1697 | if (index >= num_valid) | |
1698 | return NULL; | |
1699 | ||
db6b0b81 | 1700 | buffer_offset = start_offset + sizeof(binder_size_t) * index; |
bb4a2e48 TK |
1701 | if (binder_alloc_copy_from_buffer(&proc->alloc, &object_offset, |
1702 | b, buffer_offset, | |
1703 | sizeof(object_offset))) | |
1704 | return NULL; | |
db6b0b81 TK |
1705 | object_size = binder_get_object(proc, b, object_offset, object); |
1706 | if (!object_size || object->hdr.type != BINDER_TYPE_PTR) | |
7980240b | 1707 | return NULL; |
db6b0b81 TK |
1708 | if (object_offsetp) |
1709 | *object_offsetp = object_offset; | |
7980240b | 1710 | |
db6b0b81 | 1711 | return &object->bbo; |
7980240b MC |
1712 | } |
1713 | ||
1714 | /** | |
1715 | * binder_validate_fixup() - validates pointer/fd fixups happen in order. | |
db6b0b81 | 1716 | * @proc: binder_proc owning the buffer |
7980240b | 1717 | * @b: transaction buffer |
db6b0b81 TK |
1718 | * @objects_start_offset: offset to start of objects buffer |
1719 | * @buffer_obj_offset: offset to binder_buffer_object in which to fix up | |
1720 | * @fixup_offset: start offset in @buffer to fix up | |
1721 | * @last_obj_offset: offset to last binder_buffer_object that we fixed | |
1722 | * @last_min_offset: minimum fixup offset in object at @last_obj_offset | |
7980240b MC |
1723 | * |
1724 | * Return: %true if a fixup in buffer @buffer at offset @offset is | |
1725 | * allowed. | |
1726 | * | |
1727 | * For safety reasons, we only allow fixups inside a buffer to happen | |
1728 | * at increasing offsets; additionally, we only allow fixup on the last | |
1729 | * buffer object that was verified, or one of its parents. | |
1730 | * | |
1731 | * Example of what is allowed: | |
1732 | * | |
1733 | * A | |
1734 | * B (parent = A, offset = 0) | |
1735 | * C (parent = A, offset = 16) | |
1736 | * D (parent = C, offset = 0) | |
1737 | * E (parent = A, offset = 32) // min_offset is 16 (C.parent_offset) | |
1738 | * | |
1739 | * Examples of what is not allowed: | |
1740 | * | |
1741 | * Decreasing offsets within the same parent: | |
1742 | * A | |
1743 | * C (parent = A, offset = 16) | |
1744 | * B (parent = A, offset = 0) // decreasing offset within A | |
1745 | * | |
1746 | * Referring to a parent that wasn't the last object or any of its parents: | |
1747 | * A | |
1748 | * B (parent = A, offset = 0) | |
1749 | * C (parent = A, offset = 0) | |
1750 | * C (parent = A, offset = 16) | |
1751 | * D (parent = B, offset = 0) // B is not A or any of A's parents | |
1752 | */ | |
db6b0b81 TK |
1753 | static bool binder_validate_fixup(struct binder_proc *proc, |
1754 | struct binder_buffer *b, | |
1755 | binder_size_t objects_start_offset, | |
1756 | binder_size_t buffer_obj_offset, | |
7980240b | 1757 | binder_size_t fixup_offset, |
db6b0b81 | 1758 | binder_size_t last_obj_offset, |
7980240b MC |
1759 | binder_size_t last_min_offset) |
1760 | { | |
db6b0b81 | 1761 | if (!last_obj_offset) { |
7980240b MC |
1762 | /* Nothing to fix up in */ |
1763 | return false; | |
1764 | } | |
1765 | ||
db6b0b81 TK |
1766 | while (last_obj_offset != buffer_obj_offset) { |
1767 | unsigned long buffer_offset; | |
1768 | struct binder_object last_object; | |
1769 | struct binder_buffer_object *last_bbo; | |
1770 | size_t object_size = binder_get_object(proc, b, last_obj_offset, | |
1771 | &last_object); | |
1772 | if (object_size != sizeof(*last_bbo)) | |
1773 | return false; | |
1774 | ||
1775 | last_bbo = &last_object.bbo; | |
7980240b MC |
1776 | /* |
1777 | * Safe to retrieve the parent of last_obj, since it | |
1778 | * was already previously verified by the driver. | |
1779 | */ | |
db6b0b81 | 1780 | if ((last_bbo->flags & BINDER_BUFFER_FLAG_HAS_PARENT) == 0) |
7980240b | 1781 | return false; |
db6b0b81 TK |
1782 | last_min_offset = last_bbo->parent_offset + sizeof(uintptr_t); |
1783 | buffer_offset = objects_start_offset + | |
bb4a2e48 TK |
1784 | sizeof(binder_size_t) * last_bbo->parent; |
1785 | if (binder_alloc_copy_from_buffer(&proc->alloc, | |
1786 | &last_obj_offset, | |
1787 | b, buffer_offset, | |
1788 | sizeof(last_obj_offset))) | |
1789 | return false; | |
7980240b MC |
1790 | } |
1791 | return (fixup_offset >= last_min_offset); | |
1792 | } | |
1793 | ||
80cd7956 TK |
1794 | /** |
1795 | * struct binder_task_work_cb - for deferred close | |
1796 | * | |
1797 | * @twork: callback_head for task work | |
1798 | * @fd: fd to close | |
1799 | * | |
1800 | * Structure to pass task work to be handled after | |
1801 | * returning from binder_ioctl() via task_work_add(). | |
1802 | */ | |
1803 | struct binder_task_work_cb { | |
1804 | struct callback_head twork; | |
1805 | struct file *file; | |
1806 | }; | |
1807 | ||
1808 | /** | |
1809 | * binder_do_fd_close() - close list of file descriptors | |
1810 | * @twork: callback head for task work | |
1811 | * | |
1812 | * It is not safe to call ksys_close() during the binder_ioctl() | |
1813 | * function if there is a chance that binder's own file descriptor | |
1814 | * might be closed. This is to meet the requirements for using | |
1815 | * fdget() (see comments for __fget_light()). Therefore use | |
1816 | * task_work_add() to schedule the close operation once we have | |
1817 | * returned from binder_ioctl(). This function is a callback | |
1818 | * for that mechanism and does the actual ksys_close() on the | |
1819 | * given file descriptor. | |
1820 | */ | |
1821 | static void binder_do_fd_close(struct callback_head *twork) | |
1822 | { | |
1823 | struct binder_task_work_cb *twcb = container_of(twork, | |
1824 | struct binder_task_work_cb, twork); | |
1825 | ||
1826 | fput(twcb->file); | |
1827 | kfree(twcb); | |
1828 | } | |
1829 | ||
1830 | /** | |
1831 | * binder_deferred_fd_close() - schedule a close for the given file-descriptor | |
1832 | * @fd: file-descriptor to close | |
1833 | * | |
1834 | * See comments in binder_do_fd_close(). This function is used to schedule | |
1835 | * a file-descriptor to be closed after returning from binder_ioctl(). | |
1836 | */ | |
1837 | static void binder_deferred_fd_close(int fd) | |
1838 | { | |
1839 | struct binder_task_work_cb *twcb; | |
1840 | ||
1841 | twcb = kzalloc(sizeof(*twcb), GFP_KERNEL); | |
1842 | if (!twcb) | |
1843 | return; | |
1844 | init_task_work(&twcb->twork, binder_do_fd_close); | |
9fe83c43 | 1845 | close_fd_get_file(fd, &twcb->file); |
6e802a4b JA |
1846 | if (twcb->file) { |
1847 | filp_close(twcb->file, current->files); | |
91989c70 | 1848 | task_work_add(current, &twcb->twork, TWA_RESUME); |
6e802a4b | 1849 | } else { |
80cd7956 | 1850 | kfree(twcb); |
6e802a4b | 1851 | } |
80cd7956 TK |
1852 | } |
1853 | ||
355b0502 GKH |
1854 | static void binder_transaction_buffer_release(struct binder_proc *proc, |
1855 | struct binder_buffer *buffer, | |
bde4a19f TK |
1856 | binder_size_t failed_at, |
1857 | bool is_failure) | |
355b0502 | 1858 | { |
355b0502 | 1859 | int debug_id = buffer->debug_id; |
bde4a19f | 1860 | binder_size_t off_start_offset, buffer_offset, off_end_offset; |
355b0502 GKH |
1861 | |
1862 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
bde4a19f | 1863 | "%d buffer release %d, size %zd-%zd, failed at %llx\n", |
355b0502 | 1864 | proc->pid, buffer->debug_id, |
bde4a19f TK |
1865 | buffer->data_size, buffer->offsets_size, |
1866 | (unsigned long long)failed_at); | |
355b0502 GKH |
1867 | |
1868 | if (buffer->target_node) | |
1869 | binder_dec_node(buffer->target_node, 1, 0); | |
1870 | ||
db6b0b81 | 1871 | off_start_offset = ALIGN(buffer->data_size, sizeof(void *)); |
bde4a19f TK |
1872 | off_end_offset = is_failure ? failed_at : |
1873 | off_start_offset + buffer->offsets_size; | |
1874 | for (buffer_offset = off_start_offset; buffer_offset < off_end_offset; | |
1875 | buffer_offset += sizeof(binder_size_t)) { | |
feba3900 | 1876 | struct binder_object_header *hdr; |
bb4a2e48 | 1877 | size_t object_size = 0; |
7a67a393 | 1878 | struct binder_object object; |
8ced0c62 | 1879 | binder_size_t object_offset; |
8ced0c62 | 1880 | |
bb4a2e48 TK |
1881 | if (!binder_alloc_copy_from_buffer(&proc->alloc, &object_offset, |
1882 | buffer, buffer_offset, | |
1883 | sizeof(object_offset))) | |
1884 | object_size = binder_get_object(proc, buffer, | |
1885 | object_offset, &object); | |
feba3900 MC |
1886 | if (object_size == 0) { |
1887 | pr_err("transaction release %d bad object at offset %lld, size %zd\n", | |
8ced0c62 | 1888 | debug_id, (u64)object_offset, buffer->data_size); |
355b0502 GKH |
1889 | continue; |
1890 | } | |
7a67a393 | 1891 | hdr = &object.hdr; |
feba3900 | 1892 | switch (hdr->type) { |
355b0502 GKH |
1893 | case BINDER_TYPE_BINDER: |
1894 | case BINDER_TYPE_WEAK_BINDER: { | |
feba3900 MC |
1895 | struct flat_binder_object *fp; |
1896 | struct binder_node *node; | |
10f62861 | 1897 | |
feba3900 MC |
1898 | fp = to_flat_binder_object(hdr); |
1899 | node = binder_get_node(proc, fp->binder); | |
355b0502 | 1900 | if (node == NULL) { |
da49889d AH |
1901 | pr_err("transaction release %d bad node %016llx\n", |
1902 | debug_id, (u64)fp->binder); | |
355b0502 GKH |
1903 | break; |
1904 | } | |
1905 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
da49889d AH |
1906 | " node %d u%016llx\n", |
1907 | node->debug_id, (u64)node->ptr); | |
feba3900 MC |
1908 | binder_dec_node(node, hdr->type == BINDER_TYPE_BINDER, |
1909 | 0); | |
adc18842 | 1910 | binder_put_node(node); |
355b0502 GKH |
1911 | } break; |
1912 | case BINDER_TYPE_HANDLE: | |
1913 | case BINDER_TYPE_WEAK_HANDLE: { | |
feba3900 | 1914 | struct flat_binder_object *fp; |
372e3147 TK |
1915 | struct binder_ref_data rdata; |
1916 | int ret; | |
0a3ffab9 | 1917 | |
feba3900 | 1918 | fp = to_flat_binder_object(hdr); |
372e3147 TK |
1919 | ret = binder_dec_ref_for_handle(proc, fp->handle, |
1920 | hdr->type == BINDER_TYPE_HANDLE, &rdata); | |
1921 | ||
1922 | if (ret) { | |
1923 | pr_err("transaction release %d bad handle %d, ret = %d\n", | |
1924 | debug_id, fp->handle, ret); | |
355b0502 GKH |
1925 | break; |
1926 | } | |
1927 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
372e3147 TK |
1928 | " ref %d desc %d\n", |
1929 | rdata.debug_id, rdata.desc); | |
355b0502 GKH |
1930 | } break; |
1931 | ||
feba3900 | 1932 | case BINDER_TYPE_FD: { |
44d8047f TK |
1933 | /* |
1934 | * No need to close the file here since user-space | |
1935 | * closes it for for successfully delivered | |
1936 | * transactions. For transactions that weren't | |
1937 | * delivered, the new fd was never allocated so | |
1938 | * there is no need to close and the fput on the | |
1939 | * file is done when the transaction is torn | |
1940 | * down. | |
1941 | */ | |
feba3900 | 1942 | } break; |
7980240b MC |
1943 | case BINDER_TYPE_PTR: |
1944 | /* | |
1945 | * Nothing to do here, this will get cleaned up when the | |
1946 | * transaction buffer gets freed | |
1947 | */ | |
1948 | break; | |
def95c73 MC |
1949 | case BINDER_TYPE_FDA: { |
1950 | struct binder_fd_array_object *fda; | |
1951 | struct binder_buffer_object *parent; | |
db6b0b81 | 1952 | struct binder_object ptr_object; |
bde4a19f | 1953 | binder_size_t fda_offset; |
def95c73 MC |
1954 | size_t fd_index; |
1955 | binder_size_t fd_buf_size; | |
bde4a19f | 1956 | binder_size_t num_valid; |
def95c73 | 1957 | |
44d8047f TK |
1958 | if (proc->tsk != current->group_leader) { |
1959 | /* | |
1960 | * Nothing to do if running in sender context | |
1961 | * The fd fixups have not been applied so no | |
1962 | * fds need to be closed. | |
1963 | */ | |
1964 | continue; | |
1965 | } | |
1966 | ||
bde4a19f TK |
1967 | num_valid = (buffer_offset - off_start_offset) / |
1968 | sizeof(binder_size_t); | |
def95c73 | 1969 | fda = to_binder_fd_array_object(hdr); |
db6b0b81 TK |
1970 | parent = binder_validate_ptr(proc, buffer, &ptr_object, |
1971 | fda->parent, | |
1972 | off_start_offset, | |
1973 | NULL, | |
bde4a19f | 1974 | num_valid); |
def95c73 | 1975 | if (!parent) { |
f7f84fde | 1976 | pr_err("transaction release %d bad parent offset\n", |
def95c73 MC |
1977 | debug_id); |
1978 | continue; | |
1979 | } | |
def95c73 MC |
1980 | fd_buf_size = sizeof(u32) * fda->num_fds; |
1981 | if (fda->num_fds >= SIZE_MAX / sizeof(u32)) { | |
1982 | pr_err("transaction release %d invalid number of fds (%lld)\n", | |
1983 | debug_id, (u64)fda->num_fds); | |
1984 | continue; | |
1985 | } | |
1986 | if (fd_buf_size > parent->length || | |
1987 | fda->parent_offset > parent->length - fd_buf_size) { | |
1988 | /* No space for all file descriptors here. */ | |
1989 | pr_err("transaction release %d not enough space for %lld fds in buffer\n", | |
1990 | debug_id, (u64)fda->num_fds); | |
1991 | continue; | |
1992 | } | |
bde4a19f TK |
1993 | /* |
1994 | * the source data for binder_buffer_object is visible | |
1995 | * to user-space and the @buffer element is the user | |
1996 | * pointer to the buffer_object containing the fd_array. | |
1997 | * Convert the address to an offset relative to | |
1998 | * the base of the transaction buffer. | |
1999 | */ | |
2000 | fda_offset = | |
2001 | (parent->buffer - (uintptr_t)buffer->user_data) + | |
2002 | fda->parent_offset; | |
8ced0c62 TK |
2003 | for (fd_index = 0; fd_index < fda->num_fds; |
2004 | fd_index++) { | |
2005 | u32 fd; | |
bb4a2e48 | 2006 | int err; |
bde4a19f TK |
2007 | binder_size_t offset = fda_offset + |
2008 | fd_index * sizeof(fd); | |
8ced0c62 | 2009 | |
bb4a2e48 TK |
2010 | err = binder_alloc_copy_from_buffer( |
2011 | &proc->alloc, &fd, buffer, | |
2012 | offset, sizeof(fd)); | |
2013 | WARN_ON(err); | |
2014 | if (!err) | |
2015 | binder_deferred_fd_close(fd); | |
8ced0c62 | 2016 | } |
def95c73 | 2017 | } break; |
355b0502 | 2018 | default: |
64dcfe6b | 2019 | pr_err("transaction release %d bad object type %x\n", |
feba3900 | 2020 | debug_id, hdr->type); |
355b0502 GKH |
2021 | break; |
2022 | } | |
2023 | } | |
2024 | } | |
2025 | ||
a056af42 MC |
2026 | static int binder_translate_binder(struct flat_binder_object *fp, |
2027 | struct binder_transaction *t, | |
2028 | struct binder_thread *thread) | |
2029 | { | |
2030 | struct binder_node *node; | |
a056af42 MC |
2031 | struct binder_proc *proc = thread->proc; |
2032 | struct binder_proc *target_proc = t->to_proc; | |
372e3147 | 2033 | struct binder_ref_data rdata; |
adc18842 | 2034 | int ret = 0; |
a056af42 MC |
2035 | |
2036 | node = binder_get_node(proc, fp->binder); | |
2037 | if (!node) { | |
673068ee | 2038 | node = binder_new_node(proc, fp); |
a056af42 MC |
2039 | if (!node) |
2040 | return -ENOMEM; | |
a056af42 MC |
2041 | } |
2042 | if (fp->cookie != node->cookie) { | |
2043 | binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n", | |
2044 | proc->pid, thread->pid, (u64)fp->binder, | |
2045 | node->debug_id, (u64)fp->cookie, | |
2046 | (u64)node->cookie); | |
adc18842 TK |
2047 | ret = -EINVAL; |
2048 | goto done; | |
2049 | } | |
2050 | if (security_binder_transfer_binder(proc->tsk, target_proc->tsk)) { | |
2051 | ret = -EPERM; | |
2052 | goto done; | |
a056af42 | 2053 | } |
a056af42 | 2054 | |
372e3147 TK |
2055 | ret = binder_inc_ref_for_node(target_proc, node, |
2056 | fp->hdr.type == BINDER_TYPE_BINDER, | |
2057 | &thread->todo, &rdata); | |
2058 | if (ret) | |
adc18842 | 2059 | goto done; |
a056af42 MC |
2060 | |
2061 | if (fp->hdr.type == BINDER_TYPE_BINDER) | |
2062 | fp->hdr.type = BINDER_TYPE_HANDLE; | |
2063 | else | |
2064 | fp->hdr.type = BINDER_TYPE_WEAK_HANDLE; | |
2065 | fp->binder = 0; | |
372e3147 | 2066 | fp->handle = rdata.desc; |
a056af42 | 2067 | fp->cookie = 0; |
a056af42 | 2068 | |
372e3147 | 2069 | trace_binder_transaction_node_to_ref(t, node, &rdata); |
a056af42 MC |
2070 | binder_debug(BINDER_DEBUG_TRANSACTION, |
2071 | " node %d u%016llx -> ref %d desc %d\n", | |
2072 | node->debug_id, (u64)node->ptr, | |
372e3147 | 2073 | rdata.debug_id, rdata.desc); |
adc18842 TK |
2074 | done: |
2075 | binder_put_node(node); | |
2076 | return ret; | |
a056af42 MC |
2077 | } |
2078 | ||
2079 | static int binder_translate_handle(struct flat_binder_object *fp, | |
2080 | struct binder_transaction *t, | |
2081 | struct binder_thread *thread) | |
2082 | { | |
a056af42 MC |
2083 | struct binder_proc *proc = thread->proc; |
2084 | struct binder_proc *target_proc = t->to_proc; | |
372e3147 TK |
2085 | struct binder_node *node; |
2086 | struct binder_ref_data src_rdata; | |
adc18842 | 2087 | int ret = 0; |
a056af42 | 2088 | |
372e3147 TK |
2089 | node = binder_get_node_from_ref(proc, fp->handle, |
2090 | fp->hdr.type == BINDER_TYPE_HANDLE, &src_rdata); | |
2091 | if (!node) { | |
a056af42 MC |
2092 | binder_user_error("%d:%d got transaction with invalid handle, %d\n", |
2093 | proc->pid, thread->pid, fp->handle); | |
2094 | return -EINVAL; | |
2095 | } | |
adc18842 TK |
2096 | if (security_binder_transfer_binder(proc->tsk, target_proc->tsk)) { |
2097 | ret = -EPERM; | |
2098 | goto done; | |
2099 | } | |
a056af42 | 2100 | |
673068ee | 2101 | binder_node_lock(node); |
372e3147 | 2102 | if (node->proc == target_proc) { |
a056af42 MC |
2103 | if (fp->hdr.type == BINDER_TYPE_HANDLE) |
2104 | fp->hdr.type = BINDER_TYPE_BINDER; | |
2105 | else | |
2106 | fp->hdr.type = BINDER_TYPE_WEAK_BINDER; | |
372e3147 TK |
2107 | fp->binder = node->ptr; |
2108 | fp->cookie = node->cookie; | |
673068ee TK |
2109 | if (node->proc) |
2110 | binder_inner_proc_lock(node->proc); | |
324fa64c TK |
2111 | else |
2112 | __acquire(&node->proc->inner_lock); | |
673068ee TK |
2113 | binder_inc_node_nilocked(node, |
2114 | fp->hdr.type == BINDER_TYPE_BINDER, | |
2115 | 0, NULL); | |
2116 | if (node->proc) | |
2117 | binder_inner_proc_unlock(node->proc); | |
324fa64c TK |
2118 | else |
2119 | __release(&node->proc->inner_lock); | |
372e3147 | 2120 | trace_binder_transaction_ref_to_node(t, node, &src_rdata); |
a056af42 MC |
2121 | binder_debug(BINDER_DEBUG_TRANSACTION, |
2122 | " ref %d desc %d -> node %d u%016llx\n", | |
372e3147 TK |
2123 | src_rdata.debug_id, src_rdata.desc, node->debug_id, |
2124 | (u64)node->ptr); | |
673068ee | 2125 | binder_node_unlock(node); |
a056af42 | 2126 | } else { |
372e3147 | 2127 | struct binder_ref_data dest_rdata; |
a056af42 | 2128 | |
673068ee | 2129 | binder_node_unlock(node); |
372e3147 TK |
2130 | ret = binder_inc_ref_for_node(target_proc, node, |
2131 | fp->hdr.type == BINDER_TYPE_HANDLE, | |
2132 | NULL, &dest_rdata); | |
2133 | if (ret) | |
adc18842 | 2134 | goto done; |
a056af42 MC |
2135 | |
2136 | fp->binder = 0; | |
372e3147 | 2137 | fp->handle = dest_rdata.desc; |
a056af42 | 2138 | fp->cookie = 0; |
372e3147 TK |
2139 | trace_binder_transaction_ref_to_ref(t, node, &src_rdata, |
2140 | &dest_rdata); | |
a056af42 MC |
2141 | binder_debug(BINDER_DEBUG_TRANSACTION, |
2142 | " ref %d desc %d -> ref %d desc %d (node %d)\n", | |
372e3147 TK |
2143 | src_rdata.debug_id, src_rdata.desc, |
2144 | dest_rdata.debug_id, dest_rdata.desc, | |
2145 | node->debug_id); | |
a056af42 | 2146 | } |
adc18842 TK |
2147 | done: |
2148 | binder_put_node(node); | |
2149 | return ret; | |
a056af42 MC |
2150 | } |
2151 | ||
8ced0c62 | 2152 | static int binder_translate_fd(u32 fd, binder_size_t fd_offset, |
a056af42 MC |
2153 | struct binder_transaction *t, |
2154 | struct binder_thread *thread, | |
2155 | struct binder_transaction *in_reply_to) | |
2156 | { | |
2157 | struct binder_proc *proc = thread->proc; | |
2158 | struct binder_proc *target_proc = t->to_proc; | |
44d8047f | 2159 | struct binder_txn_fd_fixup *fixup; |
a056af42 | 2160 | struct file *file; |
44d8047f | 2161 | int ret = 0; |
a056af42 MC |
2162 | bool target_allows_fd; |
2163 | ||
2164 | if (in_reply_to) | |
2165 | target_allows_fd = !!(in_reply_to->flags & TF_ACCEPT_FDS); | |
2166 | else | |
2167 | target_allows_fd = t->buffer->target_node->accept_fds; | |
2168 | if (!target_allows_fd) { | |
2169 | binder_user_error("%d:%d got %s with fd, %d, but target does not allow fds\n", | |
2170 | proc->pid, thread->pid, | |
2171 | in_reply_to ? "reply" : "transaction", | |
2172 | fd); | |
2173 | ret = -EPERM; | |
2174 | goto err_fd_not_accepted; | |
2175 | } | |
2176 | ||
2177 | file = fget(fd); | |
2178 | if (!file) { | |
2179 | binder_user_error("%d:%d got transaction with invalid fd, %d\n", | |
2180 | proc->pid, thread->pid, fd); | |
2181 | ret = -EBADF; | |
2182 | goto err_fget; | |
2183 | } | |
2184 | ret = security_binder_transfer_file(proc->tsk, target_proc->tsk, file); | |
2185 | if (ret < 0) { | |
2186 | ret = -EPERM; | |
2187 | goto err_security; | |
2188 | } | |
2189 | ||
44d8047f TK |
2190 | /* |
2191 | * Add fixup record for this transaction. The allocation | |
2192 | * of the fd in the target needs to be done from a | |
2193 | * target thread. | |
2194 | */ | |
2195 | fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); | |
2196 | if (!fixup) { | |
a056af42 | 2197 | ret = -ENOMEM; |
44d8047f | 2198 | goto err_alloc; |
a056af42 | 2199 | } |
44d8047f | 2200 | fixup->file = file; |
8ced0c62 | 2201 | fixup->offset = fd_offset; |
44d8047f TK |
2202 | trace_binder_transaction_fd_send(t, fd, fixup->offset); |
2203 | list_add_tail(&fixup->fixup_entry, &t->fd_fixups); | |
a056af42 | 2204 | |
44d8047f | 2205 | return ret; |
a056af42 | 2206 | |
44d8047f | 2207 | err_alloc: |
a056af42 MC |
2208 | err_security: |
2209 | fput(file); | |
2210 | err_fget: | |
2211 | err_fd_not_accepted: | |
2212 | return ret; | |
2213 | } | |
2214 | ||
def95c73 MC |
2215 | static int binder_translate_fd_array(struct binder_fd_array_object *fda, |
2216 | struct binder_buffer_object *parent, | |
2217 | struct binder_transaction *t, | |
2218 | struct binder_thread *thread, | |
2219 | struct binder_transaction *in_reply_to) | |
2220 | { | |
44d8047f | 2221 | binder_size_t fdi, fd_buf_size; |
bde4a19f | 2222 | binder_size_t fda_offset; |
def95c73 MC |
2223 | struct binder_proc *proc = thread->proc; |
2224 | struct binder_proc *target_proc = t->to_proc; | |
2225 | ||
2226 | fd_buf_size = sizeof(u32) * fda->num_fds; | |
2227 | if (fda->num_fds >= SIZE_MAX / sizeof(u32)) { | |
2228 | binder_user_error("%d:%d got transaction with invalid number of fds (%lld)\n", | |
2229 | proc->pid, thread->pid, (u64)fda->num_fds); | |
2230 | return -EINVAL; | |
2231 | } | |
2232 | if (fd_buf_size > parent->length || | |
2233 | fda->parent_offset > parent->length - fd_buf_size) { | |
2234 | /* No space for all file descriptors here. */ | |
2235 | binder_user_error("%d:%d not enough space to store %lld fds in buffer\n", | |
2236 | proc->pid, thread->pid, (u64)fda->num_fds); | |
2237 | return -EINVAL; | |
2238 | } | |
bde4a19f TK |
2239 | /* |
2240 | * the source data for binder_buffer_object is visible | |
2241 | * to user-space and the @buffer element is the user | |
2242 | * pointer to the buffer_object containing the fd_array. | |
2243 | * Convert the address to an offset relative to | |
2244 | * the base of the transaction buffer. | |
2245 | */ | |
2246 | fda_offset = (parent->buffer - (uintptr_t)t->buffer->user_data) + | |
2247 | fda->parent_offset; | |
2248 | if (!IS_ALIGNED((unsigned long)fda_offset, sizeof(u32))) { | |
def95c73 MC |
2249 | binder_user_error("%d:%d parent offset not aligned correctly.\n", |
2250 | proc->pid, thread->pid); | |
2251 | return -EINVAL; | |
2252 | } | |
2253 | for (fdi = 0; fdi < fda->num_fds; fdi++) { | |
8ced0c62 TK |
2254 | u32 fd; |
2255 | int ret; | |
bde4a19f | 2256 | binder_size_t offset = fda_offset + fdi * sizeof(fd); |
8ced0c62 | 2257 | |
bb4a2e48 TK |
2258 | ret = binder_alloc_copy_from_buffer(&target_proc->alloc, |
2259 | &fd, t->buffer, | |
2260 | offset, sizeof(fd)); | |
2261 | if (!ret) | |
2262 | ret = binder_translate_fd(fd, offset, t, thread, | |
2263 | in_reply_to); | |
44d8047f TK |
2264 | if (ret < 0) |
2265 | return ret; | |
def95c73 MC |
2266 | } |
2267 | return 0; | |
def95c73 MC |
2268 | } |
2269 | ||
7980240b MC |
2270 | static int binder_fixup_parent(struct binder_transaction *t, |
2271 | struct binder_thread *thread, | |
2272 | struct binder_buffer_object *bp, | |
db6b0b81 | 2273 | binder_size_t off_start_offset, |
7980240b | 2274 | binder_size_t num_valid, |
db6b0b81 | 2275 | binder_size_t last_fixup_obj_off, |
7980240b MC |
2276 | binder_size_t last_fixup_min_off) |
2277 | { | |
2278 | struct binder_buffer_object *parent; | |
7980240b MC |
2279 | struct binder_buffer *b = t->buffer; |
2280 | struct binder_proc *proc = thread->proc; | |
2281 | struct binder_proc *target_proc = t->to_proc; | |
db6b0b81 TK |
2282 | struct binder_object object; |
2283 | binder_size_t buffer_offset; | |
2284 | binder_size_t parent_offset; | |
7980240b MC |
2285 | |
2286 | if (!(bp->flags & BINDER_BUFFER_FLAG_HAS_PARENT)) | |
2287 | return 0; | |
2288 | ||
db6b0b81 TK |
2289 | parent = binder_validate_ptr(target_proc, b, &object, bp->parent, |
2290 | off_start_offset, &parent_offset, | |
2291 | num_valid); | |
7980240b MC |
2292 | if (!parent) { |
2293 | binder_user_error("%d:%d got transaction with invalid parent offset or type\n", | |
2294 | proc->pid, thread->pid); | |
2295 | return -EINVAL; | |
2296 | } | |
2297 | ||
db6b0b81 TK |
2298 | if (!binder_validate_fixup(target_proc, b, off_start_offset, |
2299 | parent_offset, bp->parent_offset, | |
2300 | last_fixup_obj_off, | |
7980240b MC |
2301 | last_fixup_min_off)) { |
2302 | binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n", | |
2303 | proc->pid, thread->pid); | |
2304 | return -EINVAL; | |
2305 | } | |
2306 | ||
2307 | if (parent->length < sizeof(binder_uintptr_t) || | |
2308 | bp->parent_offset > parent->length - sizeof(binder_uintptr_t)) { | |
2309 | /* No space for a pointer here! */ | |
2310 | binder_user_error("%d:%d got transaction with invalid parent offset\n", | |
2311 | proc->pid, thread->pid); | |
2312 | return -EINVAL; | |
2313 | } | |
db6b0b81 | 2314 | buffer_offset = bp->parent_offset + |
bde4a19f | 2315 | (uintptr_t)parent->buffer - (uintptr_t)b->user_data; |
bb4a2e48 TK |
2316 | if (binder_alloc_copy_to_buffer(&target_proc->alloc, b, buffer_offset, |
2317 | &bp->buffer, sizeof(bp->buffer))) { | |
2318 | binder_user_error("%d:%d got transaction with invalid parent offset\n", | |
2319 | proc->pid, thread->pid); | |
2320 | return -EINVAL; | |
2321 | } | |
7980240b MC |
2322 | |
2323 | return 0; | |
2324 | } | |
2325 | ||
408c68b1 MC |
2326 | /** |
2327 | * binder_proc_transaction() - sends a transaction to a process and wakes it up | |
2328 | * @t: transaction to send | |
2329 | * @proc: process to send the transaction to | |
2330 | * @thread: thread in @proc to send the transaction to (may be NULL) | |
2331 | * | |
2332 | * This function queues a transaction to the specified process. It will try | |
2333 | * to find a thread in the target process to handle the transaction and | |
2334 | * wake it up. If no thread is found, the work is queued to the proc | |
2335 | * waitqueue. | |
2336 | * | |
2337 | * If the @thread parameter is not NULL, the transaction is always queued | |
2338 | * to the waitlist of that specific thread. | |
2339 | * | |
432ff1e9 MB |
2340 | * Return: 0 if the transaction was successfully queued |
2341 | * BR_DEAD_REPLY if the target process or thread is dead | |
2342 | * BR_FROZEN_REPLY if the target process or thread is frozen | |
408c68b1 | 2343 | */ |
432ff1e9 | 2344 | static int binder_proc_transaction(struct binder_transaction *t, |
408c68b1 MC |
2345 | struct binder_proc *proc, |
2346 | struct binder_thread *thread) | |
2347 | { | |
408c68b1 MC |
2348 | struct binder_node *node = t->buffer->target_node; |
2349 | bool oneway = !!(t->flags & TF_ONE_WAY); | |
148ade2c | 2350 | bool pending_async = false; |
408c68b1 MC |
2351 | |
2352 | BUG_ON(!node); | |
2353 | binder_node_lock(node); | |
2354 | if (oneway) { | |
2355 | BUG_ON(thread); | |
8df5b949 | 2356 | if (node->has_async_transaction) |
148ade2c | 2357 | pending_async = true; |
8df5b949 | 2358 | else |
197410ad | 2359 | node->has_async_transaction = true; |
408c68b1 MC |
2360 | } |
2361 | ||
2362 | binder_inner_proc_lock(proc); | |
ae28c1be MB |
2363 | if (proc->is_frozen) { |
2364 | proc->sync_recv |= !oneway; | |
2365 | proc->async_recv |= oneway; | |
2366 | } | |
408c68b1 | 2367 | |
432ff1e9 MB |
2368 | if ((proc->is_frozen && !oneway) || proc->is_dead || |
2369 | (thread && thread->is_dead)) { | |
408c68b1 MC |
2370 | binder_inner_proc_unlock(proc); |
2371 | binder_node_unlock(node); | |
432ff1e9 | 2372 | return proc->is_frozen ? BR_FROZEN_REPLY : BR_DEAD_REPLY; |
408c68b1 MC |
2373 | } |
2374 | ||
148ade2c | 2375 | if (!thread && !pending_async) |
408c68b1 MC |
2376 | thread = binder_select_thread_ilocked(proc); |
2377 | ||
2378 | if (thread) | |
148ade2c MC |
2379 | binder_enqueue_thread_work_ilocked(thread, &t->work); |
2380 | else if (!pending_async) | |
2381 | binder_enqueue_work_ilocked(&t->work, &proc->todo); | |
408c68b1 | 2382 | else |
148ade2c | 2383 | binder_enqueue_work_ilocked(&t->work, &node->async_todo); |
408c68b1 | 2384 | |
148ade2c | 2385 | if (!pending_async) |
408c68b1 MC |
2386 | binder_wakeup_thread_ilocked(proc, thread, !oneway /* sync */); |
2387 | ||
432ff1e9 | 2388 | proc->outstanding_txns++; |
408c68b1 MC |
2389 | binder_inner_proc_unlock(proc); |
2390 | binder_node_unlock(node); | |
2391 | ||
432ff1e9 | 2392 | return 0; |
408c68b1 MC |
2393 | } |
2394 | ||
512cf465 TK |
2395 | /** |
2396 | * binder_get_node_refs_for_txn() - Get required refs on node for txn | |
2397 | * @node: struct binder_node for which to get refs | |
2398 | * @proc: returns @node->proc if valid | |
2399 | * @error: if no @proc then returns BR_DEAD_REPLY | |
2400 | * | |
2401 | * User-space normally keeps the node alive when creating a transaction | |
2402 | * since it has a reference to the target. The local strong ref keeps it | |
2403 | * alive if the sending process dies before the target process processes | |
2404 | * the transaction. If the source process is malicious or has a reference | |
2405 | * counting bug, relying on the local strong ref can fail. | |
2406 | * | |
2407 | * Since user-space can cause the local strong ref to go away, we also take | |
2408 | * a tmpref on the node to ensure it survives while we are constructing | |
2409 | * the transaction. We also need a tmpref on the proc while we are | |
2410 | * constructing the transaction, so we take that here as well. | |
2411 | * | |
2412 | * Return: The target_node with refs taken or NULL if no @node->proc is NULL. | |
2413 | * Also sets @proc if valid. If the @node->proc is NULL indicating that the | |
2414 | * target proc has died, @error is set to BR_DEAD_REPLY | |
2415 | */ | |
2416 | static struct binder_node *binder_get_node_refs_for_txn( | |
2417 | struct binder_node *node, | |
2418 | struct binder_proc **procp, | |
2419 | uint32_t *error) | |
2420 | { | |
2421 | struct binder_node *target_node = NULL; | |
2422 | ||
2423 | binder_node_inner_lock(node); | |
2424 | if (node->proc) { | |
2425 | target_node = node; | |
2426 | binder_inc_node_nilocked(node, 1, 0, NULL); | |
2427 | binder_inc_node_tmpref_ilocked(node); | |
2428 | node->proc->tmp_ref++; | |
2429 | *procp = node->proc; | |
2430 | } else | |
2431 | *error = BR_DEAD_REPLY; | |
2432 | binder_node_inner_unlock(node); | |
2433 | ||
2434 | return target_node; | |
2435 | } | |
2436 | ||
355b0502 GKH |
2437 | static void binder_transaction(struct binder_proc *proc, |
2438 | struct binder_thread *thread, | |
4bfac80a MC |
2439 | struct binder_transaction_data *tr, int reply, |
2440 | binder_size_t extra_buffers_size) | |
355b0502 | 2441 | { |
a056af42 | 2442 | int ret; |
355b0502 | 2443 | struct binder_transaction *t; |
44b73962 | 2444 | struct binder_work *w; |
355b0502 | 2445 | struct binder_work *tcomplete; |
bde4a19f TK |
2446 | binder_size_t buffer_offset = 0; |
2447 | binder_size_t off_start_offset, off_end_offset; | |
212265e5 | 2448 | binder_size_t off_min; |
bde4a19f | 2449 | binder_size_t sg_buf_offset, sg_buf_end_offset; |
7a4408c6 | 2450 | struct binder_proc *target_proc = NULL; |
355b0502 GKH |
2451 | struct binder_thread *target_thread = NULL; |
2452 | struct binder_node *target_node = NULL; | |
355b0502 GKH |
2453 | struct binder_transaction *in_reply_to = NULL; |
2454 | struct binder_transaction_log_entry *e; | |
57ada2fb TK |
2455 | uint32_t return_error = 0; |
2456 | uint32_t return_error_param = 0; | |
2457 | uint32_t return_error_line = 0; | |
db6b0b81 | 2458 | binder_size_t last_fixup_obj_off = 0; |
7980240b | 2459 | binder_size_t last_fixup_min_off = 0; |
342e5c90 | 2460 | struct binder_context *context = proc->context; |
d99c7333 | 2461 | int t_debug_id = atomic_inc_return(&binder_last_id); |
ec74136d TK |
2462 | char *secctx = NULL; |
2463 | u32 secctx_sz = 0; | |
355b0502 GKH |
2464 | |
2465 | e = binder_transaction_log_add(&binder_transaction_log); | |
d99c7333 | 2466 | e->debug_id = t_debug_id; |
355b0502 GKH |
2467 | e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY); |
2468 | e->from_proc = proc->pid; | |
2469 | e->from_thread = thread->pid; | |
2470 | e->target_handle = tr->target.handle; | |
2471 | e->data_size = tr->data_size; | |
2472 | e->offsets_size = tr->offsets_size; | |
51d8a7ec | 2473 | strscpy(e->context_name, proc->context->name, BINDERFS_MAX_NAME); |
355b0502 GKH |
2474 | |
2475 | if (reply) { | |
0b89d69a | 2476 | binder_inner_proc_lock(proc); |
355b0502 GKH |
2477 | in_reply_to = thread->transaction_stack; |
2478 | if (in_reply_to == NULL) { | |
0b89d69a | 2479 | binder_inner_proc_unlock(proc); |
56b468fc | 2480 | binder_user_error("%d:%d got reply transaction with no transaction stack\n", |
355b0502 GKH |
2481 | proc->pid, thread->pid); |
2482 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2483 | return_error_param = -EPROTO; |
2484 | return_error_line = __LINE__; | |
355b0502 GKH |
2485 | goto err_empty_call_stack; |
2486 | } | |
355b0502 | 2487 | if (in_reply_to->to_thread != thread) { |
7a4408c6 | 2488 | spin_lock(&in_reply_to->lock); |
56b468fc | 2489 | binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n", |
355b0502 GKH |
2490 | proc->pid, thread->pid, in_reply_to->debug_id, |
2491 | in_reply_to->to_proc ? | |
2492 | in_reply_to->to_proc->pid : 0, | |
2493 | in_reply_to->to_thread ? | |
2494 | in_reply_to->to_thread->pid : 0); | |
7a4408c6 | 2495 | spin_unlock(&in_reply_to->lock); |
0b89d69a | 2496 | binder_inner_proc_unlock(proc); |
355b0502 | 2497 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2498 | return_error_param = -EPROTO; |
2499 | return_error_line = __LINE__; | |
355b0502 GKH |
2500 | in_reply_to = NULL; |
2501 | goto err_bad_call_stack; | |
2502 | } | |
2503 | thread->transaction_stack = in_reply_to->to_parent; | |
0b89d69a MC |
2504 | binder_inner_proc_unlock(proc); |
2505 | binder_set_nice(in_reply_to->saved_priority); | |
2506 | target_thread = binder_get_txn_from_and_acq_inner(in_reply_to); | |
355b0502 | 2507 | if (target_thread == NULL) { |
324fa64c TK |
2508 | /* annotation for sparse */ |
2509 | __release(&target_thread->proc->inner_lock); | |
355b0502 | 2510 | return_error = BR_DEAD_REPLY; |
57ada2fb | 2511 | return_error_line = __LINE__; |
355b0502 GKH |
2512 | goto err_dead_binder; |
2513 | } | |
2514 | if (target_thread->transaction_stack != in_reply_to) { | |
56b468fc | 2515 | binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n", |
355b0502 GKH |
2516 | proc->pid, thread->pid, |
2517 | target_thread->transaction_stack ? | |
2518 | target_thread->transaction_stack->debug_id : 0, | |
2519 | in_reply_to->debug_id); | |
0b89d69a | 2520 | binder_inner_proc_unlock(target_thread->proc); |
355b0502 | 2521 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2522 | return_error_param = -EPROTO; |
2523 | return_error_line = __LINE__; | |
355b0502 GKH |
2524 | in_reply_to = NULL; |
2525 | target_thread = NULL; | |
2526 | goto err_dead_binder; | |
2527 | } | |
2528 | target_proc = target_thread->proc; | |
7a4408c6 | 2529 | target_proc->tmp_ref++; |
0b89d69a | 2530 | binder_inner_proc_unlock(target_thread->proc); |
355b0502 GKH |
2531 | } else { |
2532 | if (tr->target.handle) { | |
2533 | struct binder_ref *ref; | |
10f62861 | 2534 | |
eb34983b TK |
2535 | /* |
2536 | * There must already be a strong ref | |
2537 | * on this node. If so, do a strong | |
2538 | * increment on the node to ensure it | |
2539 | * stays alive until the transaction is | |
2540 | * done. | |
2541 | */ | |
2c1838dc TK |
2542 | binder_proc_lock(proc); |
2543 | ref = binder_get_ref_olocked(proc, tr->target.handle, | |
2544 | true); | |
eb34983b | 2545 | if (ref) { |
512cf465 TK |
2546 | target_node = binder_get_node_refs_for_txn( |
2547 | ref->node, &target_proc, | |
2548 | &return_error); | |
2549 | } else { | |
1ae14df5 RJ |
2550 | binder_user_error("%d:%d got transaction to invalid handle, %u\n", |
2551 | proc->pid, thread->pid, tr->target.handle); | |
355b0502 | 2552 | return_error = BR_FAILED_REPLY; |
355b0502 | 2553 | } |
512cf465 | 2554 | binder_proc_unlock(proc); |
355b0502 | 2555 | } else { |
c44b1231 | 2556 | mutex_lock(&context->context_mgr_node_lock); |
342e5c90 | 2557 | target_node = context->binder_context_mgr_node; |
512cf465 TK |
2558 | if (target_node) |
2559 | target_node = binder_get_node_refs_for_txn( | |
2560 | target_node, &target_proc, | |
2561 | &return_error); | |
2562 | else | |
355b0502 | 2563 | return_error = BR_DEAD_REPLY; |
c44b1231 | 2564 | mutex_unlock(&context->context_mgr_node_lock); |
49ed9694 | 2565 | if (target_node && target_proc->pid == proc->pid) { |
7aa135fc MC |
2566 | binder_user_error("%d:%d got transaction to context manager from process owning it\n", |
2567 | proc->pid, thread->pid); | |
2568 | return_error = BR_FAILED_REPLY; | |
2569 | return_error_param = -EINVAL; | |
2570 | return_error_line = __LINE__; | |
2571 | goto err_invalid_target_handle; | |
2572 | } | |
355b0502 | 2573 | } |
512cf465 TK |
2574 | if (!target_node) { |
2575 | /* | |
2576 | * return_error is set above | |
2577 | */ | |
2578 | return_error_param = -EINVAL; | |
57ada2fb | 2579 | return_error_line = __LINE__; |
355b0502 GKH |
2580 | goto err_dead_binder; |
2581 | } | |
512cf465 | 2582 | e->to_node = target_node->debug_id; |
4b836a14 JH |
2583 | if (WARN_ON(proc == target_proc)) { |
2584 | return_error = BR_FAILED_REPLY; | |
2585 | return_error_param = -EINVAL; | |
2586 | return_error_line = __LINE__; | |
2587 | goto err_invalid_target_handle; | |
2588 | } | |
79af7307 SS |
2589 | if (security_binder_transaction(proc->tsk, |
2590 | target_proc->tsk) < 0) { | |
2591 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2592 | return_error_param = -EPERM; |
2593 | return_error_line = __LINE__; | |
79af7307 SS |
2594 | goto err_invalid_target_handle; |
2595 | } | |
0b89d69a | 2596 | binder_inner_proc_lock(proc); |
44b73962 SY |
2597 | |
2598 | w = list_first_entry_or_null(&thread->todo, | |
2599 | struct binder_work, entry); | |
2600 | if (!(tr->flags & TF_ONE_WAY) && w && | |
2601 | w->type == BINDER_WORK_TRANSACTION) { | |
2602 | /* | |
2603 | * Do not allow new outgoing transaction from a | |
2604 | * thread that has a transaction at the head of | |
2605 | * its todo list. Only need to check the head | |
2606 | * because binder_select_thread_ilocked picks a | |
2607 | * thread from proc->waiting_threads to enqueue | |
2608 | * the transaction, and nothing is queued to the | |
2609 | * todo list while the thread is on waiting_threads. | |
2610 | */ | |
2611 | binder_user_error("%d:%d new transaction not allowed when there is a transaction on thread todo\n", | |
2612 | proc->pid, thread->pid); | |
2613 | binder_inner_proc_unlock(proc); | |
2614 | return_error = BR_FAILED_REPLY; | |
2615 | return_error_param = -EPROTO; | |
2616 | return_error_line = __LINE__; | |
2617 | goto err_bad_todo_list; | |
2618 | } | |
2619 | ||
355b0502 GKH |
2620 | if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) { |
2621 | struct binder_transaction *tmp; | |
10f62861 | 2622 | |
355b0502 GKH |
2623 | tmp = thread->transaction_stack; |
2624 | if (tmp->to_thread != thread) { | |
7a4408c6 | 2625 | spin_lock(&tmp->lock); |
56b468fc | 2626 | binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n", |
355b0502 GKH |
2627 | proc->pid, thread->pid, tmp->debug_id, |
2628 | tmp->to_proc ? tmp->to_proc->pid : 0, | |
2629 | tmp->to_thread ? | |
2630 | tmp->to_thread->pid : 0); | |
7a4408c6 | 2631 | spin_unlock(&tmp->lock); |
0b89d69a | 2632 | binder_inner_proc_unlock(proc); |
355b0502 | 2633 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2634 | return_error_param = -EPROTO; |
2635 | return_error_line = __LINE__; | |
355b0502 GKH |
2636 | goto err_bad_call_stack; |
2637 | } | |
2638 | while (tmp) { | |
7a4408c6 TK |
2639 | struct binder_thread *from; |
2640 | ||
2641 | spin_lock(&tmp->lock); | |
2642 | from = tmp->from; | |
2643 | if (from && from->proc == target_proc) { | |
2644 | atomic_inc(&from->tmp_ref); | |
2645 | target_thread = from; | |
2646 | spin_unlock(&tmp->lock); | |
2647 | break; | |
2648 | } | |
2649 | spin_unlock(&tmp->lock); | |
355b0502 GKH |
2650 | tmp = tmp->from_parent; |
2651 | } | |
2652 | } | |
0b89d69a | 2653 | binder_inner_proc_unlock(proc); |
355b0502 | 2654 | } |
408c68b1 | 2655 | if (target_thread) |
355b0502 | 2656 | e->to_thread = target_thread->pid; |
355b0502 GKH |
2657 | e->to_proc = target_proc->pid; |
2658 | ||
2659 | /* TODO: reuse incoming transaction for reply */ | |
2660 | t = kzalloc(sizeof(*t), GFP_KERNEL); | |
2661 | if (t == NULL) { | |
2662 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2663 | return_error_param = -ENOMEM; |
2664 | return_error_line = __LINE__; | |
355b0502 GKH |
2665 | goto err_alloc_t_failed; |
2666 | } | |
44d8047f | 2667 | INIT_LIST_HEAD(&t->fd_fixups); |
355b0502 | 2668 | binder_stats_created(BINDER_STAT_TRANSACTION); |
7a4408c6 | 2669 | spin_lock_init(&t->lock); |
355b0502 GKH |
2670 | |
2671 | tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL); | |
2672 | if (tcomplete == NULL) { | |
2673 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2674 | return_error_param = -ENOMEM; |
2675 | return_error_line = __LINE__; | |
355b0502 GKH |
2676 | goto err_alloc_tcomplete_failed; |
2677 | } | |
2678 | binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE); | |
2679 | ||
d99c7333 | 2680 | t->debug_id = t_debug_id; |
355b0502 GKH |
2681 | |
2682 | if (reply) | |
2683 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
4bfac80a | 2684 | "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld-%lld\n", |
355b0502 GKH |
2685 | proc->pid, thread->pid, t->debug_id, |
2686 | target_proc->pid, target_thread->pid, | |
da49889d AH |
2687 | (u64)tr->data.ptr.buffer, |
2688 | (u64)tr->data.ptr.offsets, | |
4bfac80a MC |
2689 | (u64)tr->data_size, (u64)tr->offsets_size, |
2690 | (u64)extra_buffers_size); | |
355b0502 GKH |
2691 | else |
2692 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
4bfac80a | 2693 | "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld-%lld\n", |
355b0502 GKH |
2694 | proc->pid, thread->pid, t->debug_id, |
2695 | target_proc->pid, target_node->debug_id, | |
da49889d AH |
2696 | (u64)tr->data.ptr.buffer, |
2697 | (u64)tr->data.ptr.offsets, | |
4bfac80a MC |
2698 | (u64)tr->data_size, (u64)tr->offsets_size, |
2699 | (u64)extra_buffers_size); | |
355b0502 GKH |
2700 | |
2701 | if (!reply && !(tr->flags & TF_ONE_WAY)) | |
2702 | t->from = thread; | |
2703 | else | |
2704 | t->from = NULL; | |
57bab7cb | 2705 | t->sender_euid = task_euid(proc->tsk); |
355b0502 GKH |
2706 | t->to_proc = target_proc; |
2707 | t->to_thread = target_thread; | |
2708 | t->code = tr->code; | |
2709 | t->flags = tr->flags; | |
2710 | t->priority = task_nice(current); | |
975a1ac9 | 2711 | |
ec74136d TK |
2712 | if (target_node && target_node->txn_security_ctx) { |
2713 | u32 secid; | |
0b050950 | 2714 | size_t added_size; |
ec74136d | 2715 | |
4ebd7651 PM |
2716 | /* |
2717 | * Arguably this should be the task's subjective LSM secid but | |
2718 | * we can't reliably access the subjective creds of a task | |
2719 | * other than our own so we must use the objective creds, which | |
2720 | * are safe to access. The downside is that if a task is | |
2721 | * temporarily overriding it's creds it will not be reflected | |
2722 | * here; however, it isn't clear that binder would handle that | |
2723 | * case well anyway. | |
2724 | */ | |
2725 | security_task_getsecid_obj(proc->tsk, &secid); | |
ec74136d TK |
2726 | ret = security_secid_to_secctx(secid, &secctx, &secctx_sz); |
2727 | if (ret) { | |
2728 | return_error = BR_FAILED_REPLY; | |
2729 | return_error_param = ret; | |
2730 | return_error_line = __LINE__; | |
2731 | goto err_get_secctx_failed; | |
2732 | } | |
0b050950 TK |
2733 | added_size = ALIGN(secctx_sz, sizeof(u64)); |
2734 | extra_buffers_size += added_size; | |
2735 | if (extra_buffers_size < added_size) { | |
2736 | /* integer overflow of extra_buffers_size */ | |
2737 | return_error = BR_FAILED_REPLY; | |
88f6c779 | 2738 | return_error_param = -EINVAL; |
0b050950 TK |
2739 | return_error_line = __LINE__; |
2740 | goto err_bad_extra_size; | |
2741 | } | |
ec74136d TK |
2742 | } |
2743 | ||
975a1ac9 AH |
2744 | trace_binder_transaction(reply, t, target_node); |
2745 | ||
19c98724 | 2746 | t->buffer = binder_alloc_new_buf(&target_proc->alloc, tr->data_size, |
4bfac80a | 2747 | tr->offsets_size, extra_buffers_size, |
261e7818 | 2748 | !reply && (t->flags & TF_ONE_WAY), current->tgid); |
57ada2fb TK |
2749 | if (IS_ERR(t->buffer)) { |
2750 | /* | |
2751 | * -ESRCH indicates VMA cleared. The target is dying. | |
2752 | */ | |
2753 | return_error_param = PTR_ERR(t->buffer); | |
2754 | return_error = return_error_param == -ESRCH ? | |
2755 | BR_DEAD_REPLY : BR_FAILED_REPLY; | |
2756 | return_error_line = __LINE__; | |
2757 | t->buffer = NULL; | |
355b0502 GKH |
2758 | goto err_binder_alloc_buf_failed; |
2759 | } | |
ec74136d | 2760 | if (secctx) { |
bb4a2e48 | 2761 | int err; |
ec74136d TK |
2762 | size_t buf_offset = ALIGN(tr->data_size, sizeof(void *)) + |
2763 | ALIGN(tr->offsets_size, sizeof(void *)) + | |
2764 | ALIGN(extra_buffers_size, sizeof(void *)) - | |
2765 | ALIGN(secctx_sz, sizeof(u64)); | |
ec74136d | 2766 | |
bde4a19f | 2767 | t->security_ctx = (uintptr_t)t->buffer->user_data + buf_offset; |
bb4a2e48 TK |
2768 | err = binder_alloc_copy_to_buffer(&target_proc->alloc, |
2769 | t->buffer, buf_offset, | |
2770 | secctx, secctx_sz); | |
2771 | if (err) { | |
2772 | t->security_ctx = 0; | |
2773 | WARN_ON(1); | |
2774 | } | |
ec74136d TK |
2775 | security_release_secctx(secctx, secctx_sz); |
2776 | secctx = NULL; | |
2777 | } | |
355b0502 GKH |
2778 | t->buffer->debug_id = t->debug_id; |
2779 | t->buffer->transaction = t; | |
2780 | t->buffer->target_node = target_node; | |
0f966cba | 2781 | t->buffer->clear_on_free = !!(t->flags & TF_CLEAR_BUF); |
975a1ac9 | 2782 | trace_binder_transaction_alloc_buf(t->buffer); |
355b0502 | 2783 | |
1a7c3d9b TK |
2784 | if (binder_alloc_copy_user_to_buffer( |
2785 | &target_proc->alloc, | |
2786 | t->buffer, 0, | |
2787 | (const void __user *) | |
2788 | (uintptr_t)tr->data.ptr.buffer, | |
2789 | tr->data_size)) { | |
56b468fc AS |
2790 | binder_user_error("%d:%d got transaction with invalid data ptr\n", |
2791 | proc->pid, thread->pid); | |
355b0502 | 2792 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2793 | return_error_param = -EFAULT; |
2794 | return_error_line = __LINE__; | |
355b0502 GKH |
2795 | goto err_copy_data_failed; |
2796 | } | |
1a7c3d9b TK |
2797 | if (binder_alloc_copy_user_to_buffer( |
2798 | &target_proc->alloc, | |
2799 | t->buffer, | |
2800 | ALIGN(tr->data_size, sizeof(void *)), | |
2801 | (const void __user *) | |
2802 | (uintptr_t)tr->data.ptr.offsets, | |
2803 | tr->offsets_size)) { | |
56b468fc AS |
2804 | binder_user_error("%d:%d got transaction with invalid offsets ptr\n", |
2805 | proc->pid, thread->pid); | |
355b0502 | 2806 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2807 | return_error_param = -EFAULT; |
2808 | return_error_line = __LINE__; | |
355b0502 GKH |
2809 | goto err_copy_data_failed; |
2810 | } | |
da49889d AH |
2811 | if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) { |
2812 | binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n", | |
2813 | proc->pid, thread->pid, (u64)tr->offsets_size); | |
355b0502 | 2814 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2815 | return_error_param = -EINVAL; |
2816 | return_error_line = __LINE__; | |
355b0502 GKH |
2817 | goto err_bad_offset; |
2818 | } | |
7980240b MC |
2819 | if (!IS_ALIGNED(extra_buffers_size, sizeof(u64))) { |
2820 | binder_user_error("%d:%d got transaction with unaligned buffers size, %lld\n", | |
2821 | proc->pid, thread->pid, | |
2822 | (u64)extra_buffers_size); | |
2823 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2824 | return_error_param = -EINVAL; |
2825 | return_error_line = __LINE__; | |
7980240b MC |
2826 | goto err_bad_offset; |
2827 | } | |
bde4a19f TK |
2828 | off_start_offset = ALIGN(tr->data_size, sizeof(void *)); |
2829 | buffer_offset = off_start_offset; | |
2830 | off_end_offset = off_start_offset + tr->offsets_size; | |
2831 | sg_buf_offset = ALIGN(off_end_offset, sizeof(void *)); | |
a5658706 MC |
2832 | sg_buf_end_offset = sg_buf_offset + extra_buffers_size - |
2833 | ALIGN(secctx_sz, sizeof(u64)); | |
212265e5 | 2834 | off_min = 0; |
bde4a19f TK |
2835 | for (buffer_offset = off_start_offset; buffer_offset < off_end_offset; |
2836 | buffer_offset += sizeof(binder_size_t)) { | |
feba3900 | 2837 | struct binder_object_header *hdr; |
8ced0c62 | 2838 | size_t object_size; |
7a67a393 | 2839 | struct binder_object object; |
8ced0c62 | 2840 | binder_size_t object_offset; |
8ced0c62 | 2841 | |
bb4a2e48 TK |
2842 | if (binder_alloc_copy_from_buffer(&target_proc->alloc, |
2843 | &object_offset, | |
2844 | t->buffer, | |
2845 | buffer_offset, | |
2846 | sizeof(object_offset))) { | |
2847 | return_error = BR_FAILED_REPLY; | |
2848 | return_error_param = -EINVAL; | |
2849 | return_error_line = __LINE__; | |
2850 | goto err_bad_offset; | |
2851 | } | |
7a67a393 TK |
2852 | object_size = binder_get_object(target_proc, t->buffer, |
2853 | object_offset, &object); | |
8ced0c62 | 2854 | if (object_size == 0 || object_offset < off_min) { |
feba3900 | 2855 | binder_user_error("%d:%d got transaction with invalid offset (%lld, min %lld max %lld) or object.\n", |
8ced0c62 TK |
2856 | proc->pid, thread->pid, |
2857 | (u64)object_offset, | |
212265e5 | 2858 | (u64)off_min, |
feba3900 | 2859 | (u64)t->buffer->data_size); |
355b0502 | 2860 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2861 | return_error_param = -EINVAL; |
2862 | return_error_line = __LINE__; | |
355b0502 GKH |
2863 | goto err_bad_offset; |
2864 | } | |
feba3900 | 2865 | |
7a67a393 | 2866 | hdr = &object.hdr; |
8ced0c62 | 2867 | off_min = object_offset + object_size; |
feba3900 | 2868 | switch (hdr->type) { |
355b0502 GKH |
2869 | case BINDER_TYPE_BINDER: |
2870 | case BINDER_TYPE_WEAK_BINDER: { | |
feba3900 | 2871 | struct flat_binder_object *fp; |
10f62861 | 2872 | |
feba3900 | 2873 | fp = to_flat_binder_object(hdr); |
a056af42 | 2874 | ret = binder_translate_binder(fp, t, thread); |
bb4a2e48 TK |
2875 | |
2876 | if (ret < 0 || | |
2877 | binder_alloc_copy_to_buffer(&target_proc->alloc, | |
2878 | t->buffer, | |
2879 | object_offset, | |
2880 | fp, sizeof(*fp))) { | |
355b0502 | 2881 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2882 | return_error_param = ret; |
2883 | return_error_line = __LINE__; | |
a056af42 | 2884 | goto err_translate_failed; |
355b0502 | 2885 | } |
355b0502 GKH |
2886 | } break; |
2887 | case BINDER_TYPE_HANDLE: | |
2888 | case BINDER_TYPE_WEAK_HANDLE: { | |
feba3900 | 2889 | struct flat_binder_object *fp; |
0a3ffab9 | 2890 | |
feba3900 | 2891 | fp = to_flat_binder_object(hdr); |
a056af42 | 2892 | ret = binder_translate_handle(fp, t, thread); |
bb4a2e48 TK |
2893 | if (ret < 0 || |
2894 | binder_alloc_copy_to_buffer(&target_proc->alloc, | |
2895 | t->buffer, | |
2896 | object_offset, | |
2897 | fp, sizeof(*fp))) { | |
79af7307 | 2898 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
2899 | return_error_param = ret; |
2900 | return_error_line = __LINE__; | |
a056af42 | 2901 | goto err_translate_failed; |
355b0502 GKH |
2902 | } |
2903 | } break; | |
2904 | ||
2905 | case BINDER_TYPE_FD: { | |
feba3900 | 2906 | struct binder_fd_object *fp = to_binder_fd_object(hdr); |
8ced0c62 TK |
2907 | binder_size_t fd_offset = object_offset + |
2908 | (uintptr_t)&fp->fd - (uintptr_t)fp; | |
2909 | int ret = binder_translate_fd(fp->fd, fd_offset, t, | |
2910 | thread, in_reply_to); | |
355b0502 | 2911 | |
bb4a2e48 TK |
2912 | fp->pad_binder = 0; |
2913 | if (ret < 0 || | |
2914 | binder_alloc_copy_to_buffer(&target_proc->alloc, | |
2915 | t->buffer, | |
2916 | object_offset, | |
2917 | fp, sizeof(*fp))) { | |
355b0502 | 2918 | return_error = BR_FAILED_REPLY; |
44d8047f | 2919 | return_error_param = ret; |
57ada2fb | 2920 | return_error_line = __LINE__; |
a056af42 | 2921 | goto err_translate_failed; |
355b0502 | 2922 | } |
355b0502 | 2923 | } break; |
def95c73 | 2924 | case BINDER_TYPE_FDA: { |
db6b0b81 TK |
2925 | struct binder_object ptr_object; |
2926 | binder_size_t parent_offset; | |
def95c73 MC |
2927 | struct binder_fd_array_object *fda = |
2928 | to_binder_fd_array_object(hdr); | |
16981742 | 2929 | size_t num_valid = (buffer_offset - off_start_offset) / |
bde4a19f | 2930 | sizeof(binder_size_t); |
def95c73 | 2931 | struct binder_buffer_object *parent = |
db6b0b81 TK |
2932 | binder_validate_ptr(target_proc, t->buffer, |
2933 | &ptr_object, fda->parent, | |
2934 | off_start_offset, | |
2935 | &parent_offset, | |
bde4a19f | 2936 | num_valid); |
def95c73 MC |
2937 | if (!parent) { |
2938 | binder_user_error("%d:%d got transaction with invalid parent offset or type\n", | |
2939 | proc->pid, thread->pid); | |
2940 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2941 | return_error_param = -EINVAL; |
2942 | return_error_line = __LINE__; | |
def95c73 MC |
2943 | goto err_bad_parent; |
2944 | } | |
db6b0b81 TK |
2945 | if (!binder_validate_fixup(target_proc, t->buffer, |
2946 | off_start_offset, | |
2947 | parent_offset, | |
2948 | fda->parent_offset, | |
2949 | last_fixup_obj_off, | |
def95c73 MC |
2950 | last_fixup_min_off)) { |
2951 | binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n", | |
2952 | proc->pid, thread->pid); | |
2953 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2954 | return_error_param = -EINVAL; |
2955 | return_error_line = __LINE__; | |
def95c73 MC |
2956 | goto err_bad_parent; |
2957 | } | |
2958 | ret = binder_translate_fd_array(fda, parent, t, thread, | |
2959 | in_reply_to); | |
2960 | if (ret < 0) { | |
2961 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2962 | return_error_param = ret; |
2963 | return_error_line = __LINE__; | |
def95c73 MC |
2964 | goto err_translate_failed; |
2965 | } | |
db6b0b81 | 2966 | last_fixup_obj_off = parent_offset; |
def95c73 MC |
2967 | last_fixup_min_off = |
2968 | fda->parent_offset + sizeof(u32) * fda->num_fds; | |
2969 | } break; | |
7980240b MC |
2970 | case BINDER_TYPE_PTR: { |
2971 | struct binder_buffer_object *bp = | |
2972 | to_binder_buffer_object(hdr); | |
bde4a19f TK |
2973 | size_t buf_left = sg_buf_end_offset - sg_buf_offset; |
2974 | size_t num_valid; | |
7980240b MC |
2975 | |
2976 | if (bp->length > buf_left) { | |
2977 | binder_user_error("%d:%d got transaction with too large buffer\n", | |
2978 | proc->pid, thread->pid); | |
2979 | return_error = BR_FAILED_REPLY; | |
57ada2fb TK |
2980 | return_error_param = -EINVAL; |
2981 | return_error_line = __LINE__; | |
7980240b MC |
2982 | goto err_bad_offset; |
2983 | } | |
1a7c3d9b TK |
2984 | if (binder_alloc_copy_user_to_buffer( |
2985 | &target_proc->alloc, | |
2986 | t->buffer, | |
2987 | sg_buf_offset, | |
2988 | (const void __user *) | |
2989 | (uintptr_t)bp->buffer, | |
2990 | bp->length)) { | |
7980240b MC |
2991 | binder_user_error("%d:%d got transaction with invalid offsets ptr\n", |
2992 | proc->pid, thread->pid); | |
57ada2fb | 2993 | return_error_param = -EFAULT; |
7980240b | 2994 | return_error = BR_FAILED_REPLY; |
57ada2fb | 2995 | return_error_line = __LINE__; |
7980240b MC |
2996 | goto err_copy_data_failed; |
2997 | } | |
2998 | /* Fixup buffer pointer to target proc address space */ | |
bde4a19f TK |
2999 | bp->buffer = (uintptr_t) |
3000 | t->buffer->user_data + sg_buf_offset; | |
3001 | sg_buf_offset += ALIGN(bp->length, sizeof(u64)); | |
7980240b | 3002 | |
16981742 | 3003 | num_valid = (buffer_offset - off_start_offset) / |
bde4a19f | 3004 | sizeof(binder_size_t); |
db6b0b81 TK |
3005 | ret = binder_fixup_parent(t, thread, bp, |
3006 | off_start_offset, | |
bde4a19f | 3007 | num_valid, |
db6b0b81 | 3008 | last_fixup_obj_off, |
7980240b | 3009 | last_fixup_min_off); |
bb4a2e48 TK |
3010 | if (ret < 0 || |
3011 | binder_alloc_copy_to_buffer(&target_proc->alloc, | |
3012 | t->buffer, | |
3013 | object_offset, | |
3014 | bp, sizeof(*bp))) { | |
7980240b | 3015 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
3016 | return_error_param = ret; |
3017 | return_error_line = __LINE__; | |
7980240b MC |
3018 | goto err_translate_failed; |
3019 | } | |
db6b0b81 | 3020 | last_fixup_obj_off = object_offset; |
7980240b MC |
3021 | last_fixup_min_off = 0; |
3022 | } break; | |
355b0502 | 3023 | default: |
64dcfe6b | 3024 | binder_user_error("%d:%d got transaction with invalid object type, %x\n", |
feba3900 | 3025 | proc->pid, thread->pid, hdr->type); |
355b0502 | 3026 | return_error = BR_FAILED_REPLY; |
57ada2fb TK |
3027 | return_error_param = -EINVAL; |
3028 | return_error_line = __LINE__; | |
355b0502 GKH |
3029 | goto err_bad_object_type; |
3030 | } | |
3031 | } | |
a7dc1e6f HL |
3032 | if (t->buffer->oneway_spam_suspect) |
3033 | tcomplete->type = BINDER_WORK_TRANSACTION_ONEWAY_SPAM_SUSPECT; | |
3034 | else | |
3035 | tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE; | |
673068ee | 3036 | t->work.type = BINDER_WORK_TRANSACTION; |
ccae6f67 | 3037 | |
355b0502 | 3038 | if (reply) { |
148ade2c | 3039 | binder_enqueue_thread_work(thread, tcomplete); |
0b89d69a | 3040 | binder_inner_proc_lock(target_proc); |
b564171a LL |
3041 | if (target_thread->is_dead) { |
3042 | return_error = BR_DEAD_REPLY; | |
0b89d69a | 3043 | binder_inner_proc_unlock(target_proc); |
7a4408c6 | 3044 | goto err_dead_proc_or_thread; |
0b89d69a | 3045 | } |
355b0502 | 3046 | BUG_ON(t->buffer->async_transaction != 0); |
0b89d69a | 3047 | binder_pop_transaction_ilocked(target_thread, in_reply_to); |
148ade2c | 3048 | binder_enqueue_thread_work_ilocked(target_thread, &t->work); |
432ff1e9 | 3049 | target_proc->outstanding_txns++; |
0b89d69a | 3050 | binder_inner_proc_unlock(target_proc); |
408c68b1 | 3051 | wake_up_interruptible_sync(&target_thread->wait); |
b6d282ce | 3052 | binder_free_transaction(in_reply_to); |
355b0502 GKH |
3053 | } else if (!(t->flags & TF_ONE_WAY)) { |
3054 | BUG_ON(t->buffer->async_transaction != 0); | |
0b89d69a | 3055 | binder_inner_proc_lock(proc); |
148ade2c MC |
3056 | /* |
3057 | * Defer the TRANSACTION_COMPLETE, so we don't return to | |
3058 | * userspace immediately; this allows the target process to | |
3059 | * immediately start processing this transaction, reducing | |
3060 | * latency. We will then return the TRANSACTION_COMPLETE when | |
3061 | * the target replies (or there is an error). | |
3062 | */ | |
3063 | binder_enqueue_deferred_thread_work_ilocked(thread, tcomplete); | |
355b0502 GKH |
3064 | t->need_reply = 1; |
3065 | t->from_parent = thread->transaction_stack; | |
3066 | thread->transaction_stack = t; | |
0b89d69a | 3067 | binder_inner_proc_unlock(proc); |
432ff1e9 MB |
3068 | return_error = binder_proc_transaction(t, |
3069 | target_proc, target_thread); | |
3070 | if (return_error) { | |
0b89d69a MC |
3071 | binder_inner_proc_lock(proc); |
3072 | binder_pop_transaction_ilocked(thread, t); | |
3073 | binder_inner_proc_unlock(proc); | |
7a4408c6 TK |
3074 | goto err_dead_proc_or_thread; |
3075 | } | |
355b0502 GKH |
3076 | } else { |
3077 | BUG_ON(target_node == NULL); | |
3078 | BUG_ON(t->buffer->async_transaction != 1); | |
148ade2c | 3079 | binder_enqueue_thread_work(thread, tcomplete); |
432ff1e9 MB |
3080 | return_error = binder_proc_transaction(t, target_proc, NULL); |
3081 | if (return_error) | |
7a4408c6 | 3082 | goto err_dead_proc_or_thread; |
00b40d61 | 3083 | } |
7a4408c6 TK |
3084 | if (target_thread) |
3085 | binder_thread_dec_tmpref(target_thread); | |
3086 | binder_proc_dec_tmpref(target_proc); | |
512cf465 TK |
3087 | if (target_node) |
3088 | binder_dec_node_tmpref(target_node); | |
d99c7333 TK |
3089 | /* |
3090 | * write barrier to synchronize with initialization | |
3091 | * of log entry | |
3092 | */ | |
3093 | smp_wmb(); | |
3094 | WRITE_ONCE(e->debug_id_done, t_debug_id); | |
355b0502 GKH |
3095 | return; |
3096 | ||
7a4408c6 | 3097 | err_dead_proc_or_thread: |
7a4408c6 | 3098 | return_error_line = __LINE__; |
d53bebdf | 3099 | binder_dequeue_work(proc, tcomplete); |
a056af42 | 3100 | err_translate_failed: |
355b0502 GKH |
3101 | err_bad_object_type: |
3102 | err_bad_offset: | |
def95c73 | 3103 | err_bad_parent: |
355b0502 | 3104 | err_copy_data_failed: |
44d8047f | 3105 | binder_free_txn_fixups(t); |
975a1ac9 | 3106 | trace_binder_transaction_failed_buffer_release(t->buffer); |
bde4a19f TK |
3107 | binder_transaction_buffer_release(target_proc, t->buffer, |
3108 | buffer_offset, true); | |
512cf465 TK |
3109 | if (target_node) |
3110 | binder_dec_node_tmpref(target_node); | |
eb34983b | 3111 | target_node = NULL; |
355b0502 | 3112 | t->buffer->transaction = NULL; |
19c98724 | 3113 | binder_alloc_free_buf(&target_proc->alloc, t->buffer); |
355b0502 | 3114 | err_binder_alloc_buf_failed: |
0b050950 | 3115 | err_bad_extra_size: |
ec74136d TK |
3116 | if (secctx) |
3117 | security_release_secctx(secctx, secctx_sz); | |
3118 | err_get_secctx_failed: | |
355b0502 GKH |
3119 | kfree(tcomplete); |
3120 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); | |
3121 | err_alloc_tcomplete_failed: | |
1987f112 FC |
3122 | if (trace_binder_txn_latency_free_enabled()) |
3123 | binder_txn_latency_free(t); | |
355b0502 GKH |
3124 | kfree(t); |
3125 | binder_stats_deleted(BINDER_STAT_TRANSACTION); | |
3126 | err_alloc_t_failed: | |
44b73962 | 3127 | err_bad_todo_list: |
355b0502 GKH |
3128 | err_bad_call_stack: |
3129 | err_empty_call_stack: | |
3130 | err_dead_binder: | |
3131 | err_invalid_target_handle: | |
7a4408c6 TK |
3132 | if (target_thread) |
3133 | binder_thread_dec_tmpref(target_thread); | |
3134 | if (target_proc) | |
3135 | binder_proc_dec_tmpref(target_proc); | |
512cf465 | 3136 | if (target_node) { |
eb34983b | 3137 | binder_dec_node(target_node, 1, 0); |
512cf465 TK |
3138 | binder_dec_node_tmpref(target_node); |
3139 | } | |
eb34983b | 3140 | |
355b0502 | 3141 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
57ada2fb TK |
3142 | "%d:%d transaction failed %d/%d, size %lld-%lld line %d\n", |
3143 | proc->pid, thread->pid, return_error, return_error_param, | |
3144 | (u64)tr->data_size, (u64)tr->offsets_size, | |
3145 | return_error_line); | |
355b0502 GKH |
3146 | |
3147 | { | |
3148 | struct binder_transaction_log_entry *fe; | |
10f62861 | 3149 | |
57ada2fb TK |
3150 | e->return_error = return_error; |
3151 | e->return_error_param = return_error_param; | |
3152 | e->return_error_line = return_error_line; | |
355b0502 GKH |
3153 | fe = binder_transaction_log_add(&binder_transaction_log_failed); |
3154 | *fe = *e; | |
d99c7333 TK |
3155 | /* |
3156 | * write barrier to synchronize with initialization | |
3157 | * of log entry | |
3158 | */ | |
3159 | smp_wmb(); | |
3160 | WRITE_ONCE(e->debug_id_done, t_debug_id); | |
3161 | WRITE_ONCE(fe->debug_id_done, t_debug_id); | |
355b0502 GKH |
3162 | } |
3163 | ||
26549d17 | 3164 | BUG_ON(thread->return_error.cmd != BR_OK); |
355b0502 | 3165 | if (in_reply_to) { |
26549d17 | 3166 | thread->return_error.cmd = BR_TRANSACTION_COMPLETE; |
148ade2c | 3167 | binder_enqueue_thread_work(thread, &thread->return_error.work); |
355b0502 | 3168 | binder_send_failed_reply(in_reply_to, return_error); |
26549d17 TK |
3169 | } else { |
3170 | thread->return_error.cmd = return_error; | |
148ade2c | 3171 | binder_enqueue_thread_work(thread, &thread->return_error.work); |
26549d17 | 3172 | } |
355b0502 GKH |
3173 | } |
3174 | ||
44d8047f TK |
3175 | /** |
3176 | * binder_free_buf() - free the specified buffer | |
3177 | * @proc: binder proc that owns buffer | |
3178 | * @buffer: buffer to be freed | |
3179 | * | |
3180 | * If buffer for an async transaction, enqueue the next async | |
3181 | * transaction from the node. | |
3182 | * | |
3183 | * Cleanup buffer and free it. | |
3184 | */ | |
f4608ce9 | 3185 | static void |
44d8047f TK |
3186 | binder_free_buf(struct binder_proc *proc, struct binder_buffer *buffer) |
3187 | { | |
a370003c | 3188 | binder_inner_proc_lock(proc); |
44d8047f TK |
3189 | if (buffer->transaction) { |
3190 | buffer->transaction->buffer = NULL; | |
3191 | buffer->transaction = NULL; | |
3192 | } | |
a370003c | 3193 | binder_inner_proc_unlock(proc); |
44d8047f TK |
3194 | if (buffer->async_transaction && buffer->target_node) { |
3195 | struct binder_node *buf_node; | |
3196 | struct binder_work *w; | |
3197 | ||
3198 | buf_node = buffer->target_node; | |
3199 | binder_node_inner_lock(buf_node); | |
3200 | BUG_ON(!buf_node->has_async_transaction); | |
3201 | BUG_ON(buf_node->proc != proc); | |
3202 | w = binder_dequeue_work_head_ilocked( | |
3203 | &buf_node->async_todo); | |
3204 | if (!w) { | |
3205 | buf_node->has_async_transaction = false; | |
3206 | } else { | |
3207 | binder_enqueue_work_ilocked( | |
3208 | w, &proc->todo); | |
3209 | binder_wakeup_proc_ilocked(proc); | |
3210 | } | |
3211 | binder_node_inner_unlock(buf_node); | |
3212 | } | |
3213 | trace_binder_transaction_buffer_release(buffer); | |
bde4a19f | 3214 | binder_transaction_buffer_release(proc, buffer, 0, false); |
44d8047f TK |
3215 | binder_alloc_free_buf(&proc->alloc, buffer); |
3216 | } | |
3217 | ||
fb07ebc3 BP |
3218 | static int binder_thread_write(struct binder_proc *proc, |
3219 | struct binder_thread *thread, | |
da49889d AH |
3220 | binder_uintptr_t binder_buffer, size_t size, |
3221 | binder_size_t *consumed) | |
355b0502 GKH |
3222 | { |
3223 | uint32_t cmd; | |
342e5c90 | 3224 | struct binder_context *context = proc->context; |
da49889d | 3225 | void __user *buffer = (void __user *)(uintptr_t)binder_buffer; |
355b0502 GKH |
3226 | void __user *ptr = buffer + *consumed; |
3227 | void __user *end = buffer + size; | |
3228 | ||
26549d17 | 3229 | while (ptr < end && thread->return_error.cmd == BR_OK) { |
372e3147 TK |
3230 | int ret; |
3231 | ||
355b0502 GKH |
3232 | if (get_user(cmd, (uint32_t __user *)ptr)) |
3233 | return -EFAULT; | |
3234 | ptr += sizeof(uint32_t); | |
975a1ac9 | 3235 | trace_binder_command(cmd); |
355b0502 | 3236 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) { |
0953c797 BJS |
3237 | atomic_inc(&binder_stats.bc[_IOC_NR(cmd)]); |
3238 | atomic_inc(&proc->stats.bc[_IOC_NR(cmd)]); | |
3239 | atomic_inc(&thread->stats.bc[_IOC_NR(cmd)]); | |
355b0502 GKH |
3240 | } |
3241 | switch (cmd) { | |
3242 | case BC_INCREFS: | |
3243 | case BC_ACQUIRE: | |
3244 | case BC_RELEASE: | |
3245 | case BC_DECREFS: { | |
3246 | uint32_t target; | |
355b0502 | 3247 | const char *debug_string; |
372e3147 TK |
3248 | bool strong = cmd == BC_ACQUIRE || cmd == BC_RELEASE; |
3249 | bool increment = cmd == BC_INCREFS || cmd == BC_ACQUIRE; | |
3250 | struct binder_ref_data rdata; | |
355b0502 GKH |
3251 | |
3252 | if (get_user(target, (uint32_t __user *)ptr)) | |
3253 | return -EFAULT; | |
c44b1231 | 3254 | |
355b0502 | 3255 | ptr += sizeof(uint32_t); |
372e3147 TK |
3256 | ret = -1; |
3257 | if (increment && !target) { | |
c44b1231 | 3258 | struct binder_node *ctx_mgr_node; |
6c20032c | 3259 | |
c44b1231 TK |
3260 | mutex_lock(&context->context_mgr_node_lock); |
3261 | ctx_mgr_node = context->binder_context_mgr_node; | |
4b836a14 JH |
3262 | if (ctx_mgr_node) { |
3263 | if (ctx_mgr_node->proc == proc) { | |
3264 | binder_user_error("%d:%d context manager tried to acquire desc 0\n", | |
3265 | proc->pid, thread->pid); | |
3266 | mutex_unlock(&context->context_mgr_node_lock); | |
3267 | return -EINVAL; | |
3268 | } | |
372e3147 TK |
3269 | ret = binder_inc_ref_for_node( |
3270 | proc, ctx_mgr_node, | |
3271 | strong, NULL, &rdata); | |
4b836a14 | 3272 | } |
c44b1231 TK |
3273 | mutex_unlock(&context->context_mgr_node_lock); |
3274 | } | |
372e3147 TK |
3275 | if (ret) |
3276 | ret = binder_update_ref_for_handle( | |
3277 | proc, target, increment, strong, | |
3278 | &rdata); | |
3279 | if (!ret && rdata.desc != target) { | |
3280 | binder_user_error("%d:%d tried to acquire reference to desc %d, got %d instead\n", | |
3281 | proc->pid, thread->pid, | |
3282 | target, rdata.desc); | |
355b0502 GKH |
3283 | } |
3284 | switch (cmd) { | |
3285 | case BC_INCREFS: | |
3286 | debug_string = "IncRefs"; | |
355b0502 GKH |
3287 | break; |
3288 | case BC_ACQUIRE: | |
3289 | debug_string = "Acquire"; | |
355b0502 GKH |
3290 | break; |
3291 | case BC_RELEASE: | |
3292 | debug_string = "Release"; | |
355b0502 GKH |
3293 | break; |
3294 | case BC_DECREFS: | |
3295 | default: | |
3296 | debug_string = "DecRefs"; | |
372e3147 TK |
3297 | break; |
3298 | } | |
3299 | if (ret) { | |
3300 | binder_user_error("%d:%d %s %d refcount change on invalid ref %d ret %d\n", | |
3301 | proc->pid, thread->pid, debug_string, | |
3302 | strong, target, ret); | |
355b0502 GKH |
3303 | break; |
3304 | } | |
3305 | binder_debug(BINDER_DEBUG_USER_REFS, | |
372e3147 TK |
3306 | "%d:%d %s ref %d desc %d s %d w %d\n", |
3307 | proc->pid, thread->pid, debug_string, | |
3308 | rdata.debug_id, rdata.desc, rdata.strong, | |
3309 | rdata.weak); | |
355b0502 GKH |
3310 | break; |
3311 | } | |
3312 | case BC_INCREFS_DONE: | |
3313 | case BC_ACQUIRE_DONE: { | |
da49889d AH |
3314 | binder_uintptr_t node_ptr; |
3315 | binder_uintptr_t cookie; | |
355b0502 | 3316 | struct binder_node *node; |
673068ee | 3317 | bool free_node; |
355b0502 | 3318 | |
da49889d | 3319 | if (get_user(node_ptr, (binder_uintptr_t __user *)ptr)) |
355b0502 | 3320 | return -EFAULT; |
da49889d AH |
3321 | ptr += sizeof(binder_uintptr_t); |
3322 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) | |
355b0502 | 3323 | return -EFAULT; |
da49889d | 3324 | ptr += sizeof(binder_uintptr_t); |
355b0502 GKH |
3325 | node = binder_get_node(proc, node_ptr); |
3326 | if (node == NULL) { | |
da49889d | 3327 | binder_user_error("%d:%d %s u%016llx no match\n", |
355b0502 GKH |
3328 | proc->pid, thread->pid, |
3329 | cmd == BC_INCREFS_DONE ? | |
3330 | "BC_INCREFS_DONE" : | |
3331 | "BC_ACQUIRE_DONE", | |
da49889d | 3332 | (u64)node_ptr); |
355b0502 GKH |
3333 | break; |
3334 | } | |
3335 | if (cookie != node->cookie) { | |
da49889d | 3336 | binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n", |
355b0502 GKH |
3337 | proc->pid, thread->pid, |
3338 | cmd == BC_INCREFS_DONE ? | |
3339 | "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", | |
da49889d AH |
3340 | (u64)node_ptr, node->debug_id, |
3341 | (u64)cookie, (u64)node->cookie); | |
adc18842 | 3342 | binder_put_node(node); |
355b0502 GKH |
3343 | break; |
3344 | } | |
673068ee | 3345 | binder_node_inner_lock(node); |
355b0502 GKH |
3346 | if (cmd == BC_ACQUIRE_DONE) { |
3347 | if (node->pending_strong_ref == 0) { | |
56b468fc | 3348 | binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n", |
355b0502 GKH |
3349 | proc->pid, thread->pid, |
3350 | node->debug_id); | |
673068ee | 3351 | binder_node_inner_unlock(node); |
adc18842 | 3352 | binder_put_node(node); |
355b0502 GKH |
3353 | break; |
3354 | } | |
3355 | node->pending_strong_ref = 0; | |
3356 | } else { | |
3357 | if (node->pending_weak_ref == 0) { | |
56b468fc | 3358 | binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n", |
355b0502 GKH |
3359 | proc->pid, thread->pid, |
3360 | node->debug_id); | |
673068ee | 3361 | binder_node_inner_unlock(node); |
adc18842 | 3362 | binder_put_node(node); |
355b0502 GKH |
3363 | break; |
3364 | } | |
3365 | node->pending_weak_ref = 0; | |
3366 | } | |
673068ee TK |
3367 | free_node = binder_dec_node_nilocked(node, |
3368 | cmd == BC_ACQUIRE_DONE, 0); | |
3369 | WARN_ON(free_node); | |
355b0502 | 3370 | binder_debug(BINDER_DEBUG_USER_REFS, |
adc18842 | 3371 | "%d:%d %s node %d ls %d lw %d tr %d\n", |
355b0502 GKH |
3372 | proc->pid, thread->pid, |
3373 | cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", | |
adc18842 TK |
3374 | node->debug_id, node->local_strong_refs, |
3375 | node->local_weak_refs, node->tmp_refs); | |
673068ee | 3376 | binder_node_inner_unlock(node); |
adc18842 | 3377 | binder_put_node(node); |
355b0502 GKH |
3378 | break; |
3379 | } | |
3380 | case BC_ATTEMPT_ACQUIRE: | |
56b468fc | 3381 | pr_err("BC_ATTEMPT_ACQUIRE not supported\n"); |
355b0502 GKH |
3382 | return -EINVAL; |
3383 | case BC_ACQUIRE_RESULT: | |
56b468fc | 3384 | pr_err("BC_ACQUIRE_RESULT not supported\n"); |
355b0502 GKH |
3385 | return -EINVAL; |
3386 | ||
3387 | case BC_FREE_BUFFER: { | |
da49889d | 3388 | binder_uintptr_t data_ptr; |
355b0502 GKH |
3389 | struct binder_buffer *buffer; |
3390 | ||
da49889d | 3391 | if (get_user(data_ptr, (binder_uintptr_t __user *)ptr)) |
355b0502 | 3392 | return -EFAULT; |
da49889d | 3393 | ptr += sizeof(binder_uintptr_t); |
355b0502 | 3394 | |
53d311cf TK |
3395 | buffer = binder_alloc_prepare_to_free(&proc->alloc, |
3396 | data_ptr); | |
7bada55a TK |
3397 | if (IS_ERR_OR_NULL(buffer)) { |
3398 | if (PTR_ERR(buffer) == -EPERM) { | |
3399 | binder_user_error( | |
3400 | "%d:%d BC_FREE_BUFFER u%016llx matched unreturned or currently freeing buffer\n", | |
3401 | proc->pid, thread->pid, | |
3402 | (u64)data_ptr); | |
3403 | } else { | |
3404 | binder_user_error( | |
3405 | "%d:%d BC_FREE_BUFFER u%016llx no match\n", | |
3406 | proc->pid, thread->pid, | |
3407 | (u64)data_ptr); | |
3408 | } | |
355b0502 GKH |
3409 | break; |
3410 | } | |
3411 | binder_debug(BINDER_DEBUG_FREE_BUFFER, | |
da49889d AH |
3412 | "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n", |
3413 | proc->pid, thread->pid, (u64)data_ptr, | |
3414 | buffer->debug_id, | |
355b0502 | 3415 | buffer->transaction ? "active" : "finished"); |
44d8047f | 3416 | binder_free_buf(proc, buffer); |
355b0502 GKH |
3417 | break; |
3418 | } | |
3419 | ||
7980240b MC |
3420 | case BC_TRANSACTION_SG: |
3421 | case BC_REPLY_SG: { | |
3422 | struct binder_transaction_data_sg tr; | |
3423 | ||
3424 | if (copy_from_user(&tr, ptr, sizeof(tr))) | |
3425 | return -EFAULT; | |
3426 | ptr += sizeof(tr); | |
3427 | binder_transaction(proc, thread, &tr.transaction_data, | |
3428 | cmd == BC_REPLY_SG, tr.buffers_size); | |
3429 | break; | |
3430 | } | |
355b0502 GKH |
3431 | case BC_TRANSACTION: |
3432 | case BC_REPLY: { | |
3433 | struct binder_transaction_data tr; | |
3434 | ||
3435 | if (copy_from_user(&tr, ptr, sizeof(tr))) | |
3436 | return -EFAULT; | |
3437 | ptr += sizeof(tr); | |
4bfac80a MC |
3438 | binder_transaction(proc, thread, &tr, |
3439 | cmd == BC_REPLY, 0); | |
355b0502 GKH |
3440 | break; |
3441 | } | |
3442 | ||
3443 | case BC_REGISTER_LOOPER: | |
3444 | binder_debug(BINDER_DEBUG_THREADS, | |
56b468fc | 3445 | "%d:%d BC_REGISTER_LOOPER\n", |
355b0502 | 3446 | proc->pid, thread->pid); |
b3e68612 | 3447 | binder_inner_proc_lock(proc); |
355b0502 GKH |
3448 | if (thread->looper & BINDER_LOOPER_STATE_ENTERED) { |
3449 | thread->looper |= BINDER_LOOPER_STATE_INVALID; | |
56b468fc | 3450 | binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n", |
355b0502 GKH |
3451 | proc->pid, thread->pid); |
3452 | } else if (proc->requested_threads == 0) { | |
3453 | thread->looper |= BINDER_LOOPER_STATE_INVALID; | |
56b468fc | 3454 | binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n", |
355b0502 GKH |
3455 | proc->pid, thread->pid); |
3456 | } else { | |
3457 | proc->requested_threads--; | |
3458 | proc->requested_threads_started++; | |
3459 | } | |
3460 | thread->looper |= BINDER_LOOPER_STATE_REGISTERED; | |
b3e68612 | 3461 | binder_inner_proc_unlock(proc); |
355b0502 GKH |
3462 | break; |
3463 | case BC_ENTER_LOOPER: | |
3464 | binder_debug(BINDER_DEBUG_THREADS, | |
56b468fc | 3465 | "%d:%d BC_ENTER_LOOPER\n", |
355b0502 GKH |
3466 | proc->pid, thread->pid); |
3467 | if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) { | |
3468 | thread->looper |= BINDER_LOOPER_STATE_INVALID; | |
56b468fc | 3469 | binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n", |
355b0502 GKH |
3470 | proc->pid, thread->pid); |
3471 | } | |
3472 | thread->looper |= BINDER_LOOPER_STATE_ENTERED; | |
3473 | break; | |
3474 | case BC_EXIT_LOOPER: | |
3475 | binder_debug(BINDER_DEBUG_THREADS, | |
56b468fc | 3476 | "%d:%d BC_EXIT_LOOPER\n", |
355b0502 GKH |
3477 | proc->pid, thread->pid); |
3478 | thread->looper |= BINDER_LOOPER_STATE_EXITED; | |
3479 | break; | |
3480 | ||
3481 | case BC_REQUEST_DEATH_NOTIFICATION: | |
3482 | case BC_CLEAR_DEATH_NOTIFICATION: { | |
3483 | uint32_t target; | |
da49889d | 3484 | binder_uintptr_t cookie; |
355b0502 | 3485 | struct binder_ref *ref; |
2c1838dc | 3486 | struct binder_ref_death *death = NULL; |
355b0502 GKH |
3487 | |
3488 | if (get_user(target, (uint32_t __user *)ptr)) | |
3489 | return -EFAULT; | |
3490 | ptr += sizeof(uint32_t); | |
da49889d | 3491 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) |
355b0502 | 3492 | return -EFAULT; |
da49889d | 3493 | ptr += sizeof(binder_uintptr_t); |
2c1838dc TK |
3494 | if (cmd == BC_REQUEST_DEATH_NOTIFICATION) { |
3495 | /* | |
3496 | * Allocate memory for death notification | |
3497 | * before taking lock | |
3498 | */ | |
3499 | death = kzalloc(sizeof(*death), GFP_KERNEL); | |
3500 | if (death == NULL) { | |
3501 | WARN_ON(thread->return_error.cmd != | |
3502 | BR_OK); | |
3503 | thread->return_error.cmd = BR_ERROR; | |
148ade2c MC |
3504 | binder_enqueue_thread_work( |
3505 | thread, | |
3506 | &thread->return_error.work); | |
2c1838dc TK |
3507 | binder_debug( |
3508 | BINDER_DEBUG_FAILED_TRANSACTION, | |
3509 | "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n", | |
3510 | proc->pid, thread->pid); | |
3511 | break; | |
3512 | } | |
3513 | } | |
3514 | binder_proc_lock(proc); | |
3515 | ref = binder_get_ref_olocked(proc, target, false); | |
355b0502 | 3516 | if (ref == NULL) { |
56b468fc | 3517 | binder_user_error("%d:%d %s invalid ref %d\n", |
355b0502 GKH |
3518 | proc->pid, thread->pid, |
3519 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? | |
3520 | "BC_REQUEST_DEATH_NOTIFICATION" : | |
3521 | "BC_CLEAR_DEATH_NOTIFICATION", | |
3522 | target); | |
2c1838dc TK |
3523 | binder_proc_unlock(proc); |
3524 | kfree(death); | |
355b0502 GKH |
3525 | break; |
3526 | } | |
3527 | ||
3528 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, | |
da49889d | 3529 | "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n", |
355b0502 GKH |
3530 | proc->pid, thread->pid, |
3531 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? | |
3532 | "BC_REQUEST_DEATH_NOTIFICATION" : | |
3533 | "BC_CLEAR_DEATH_NOTIFICATION", | |
372e3147 TK |
3534 | (u64)cookie, ref->data.debug_id, |
3535 | ref->data.desc, ref->data.strong, | |
3536 | ref->data.weak, ref->node->debug_id); | |
355b0502 | 3537 | |
ab51ec6b | 3538 | binder_node_lock(ref->node); |
355b0502 GKH |
3539 | if (cmd == BC_REQUEST_DEATH_NOTIFICATION) { |
3540 | if (ref->death) { | |
56b468fc | 3541 | binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n", |
355b0502 | 3542 | proc->pid, thread->pid); |
ab51ec6b | 3543 | binder_node_unlock(ref->node); |
2c1838dc TK |
3544 | binder_proc_unlock(proc); |
3545 | kfree(death); | |
355b0502 GKH |
3546 | break; |
3547 | } | |
3548 | binder_stats_created(BINDER_STAT_DEATH); | |
3549 | INIT_LIST_HEAD(&death->work.entry); | |
3550 | death->cookie = cookie; | |
3551 | ref->death = death; | |
3552 | if (ref->node->proc == NULL) { | |
3553 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; | |
bb74562a MC |
3554 | |
3555 | binder_inner_proc_lock(proc); | |
3556 | binder_enqueue_work_ilocked( | |
3557 | &ref->death->work, &proc->todo); | |
3558 | binder_wakeup_proc_ilocked(proc); | |
3559 | binder_inner_proc_unlock(proc); | |
355b0502 GKH |
3560 | } |
3561 | } else { | |
3562 | if (ref->death == NULL) { | |
56b468fc | 3563 | binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n", |
355b0502 | 3564 | proc->pid, thread->pid); |
673068ee | 3565 | binder_node_unlock(ref->node); |
2c1838dc | 3566 | binder_proc_unlock(proc); |
355b0502 GKH |
3567 | break; |
3568 | } | |
3569 | death = ref->death; | |
3570 | if (death->cookie != cookie) { | |
da49889d | 3571 | binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n", |
355b0502 | 3572 | proc->pid, thread->pid, |
da49889d AH |
3573 | (u64)death->cookie, |
3574 | (u64)cookie); | |
673068ee | 3575 | binder_node_unlock(ref->node); |
2c1838dc | 3576 | binder_proc_unlock(proc); |
355b0502 GKH |
3577 | break; |
3578 | } | |
3579 | ref->death = NULL; | |
72196393 | 3580 | binder_inner_proc_lock(proc); |
355b0502 GKH |
3581 | if (list_empty(&death->work.entry)) { |
3582 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; | |
72196393 TK |
3583 | if (thread->looper & |
3584 | (BINDER_LOOPER_STATE_REGISTERED | | |
3585 | BINDER_LOOPER_STATE_ENTERED)) | |
148ade2c MC |
3586 | binder_enqueue_thread_work_ilocked( |
3587 | thread, | |
3588 | &death->work); | |
72196393 TK |
3589 | else { |
3590 | binder_enqueue_work_ilocked( | |
3591 | &death->work, | |
3592 | &proc->todo); | |
1b77e9dc | 3593 | binder_wakeup_proc_ilocked( |
408c68b1 | 3594 | proc); |
355b0502 GKH |
3595 | } |
3596 | } else { | |
3597 | BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER); | |
3598 | death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR; | |
3599 | } | |
72196393 | 3600 | binder_inner_proc_unlock(proc); |
355b0502 | 3601 | } |
ab51ec6b | 3602 | binder_node_unlock(ref->node); |
2c1838dc | 3603 | binder_proc_unlock(proc); |
355b0502 GKH |
3604 | } break; |
3605 | case BC_DEAD_BINDER_DONE: { | |
3606 | struct binder_work *w; | |
da49889d | 3607 | binder_uintptr_t cookie; |
355b0502 | 3608 | struct binder_ref_death *death = NULL; |
10f62861 | 3609 | |
da49889d | 3610 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) |
355b0502 GKH |
3611 | return -EFAULT; |
3612 | ||
7a64cd88 | 3613 | ptr += sizeof(cookie); |
72196393 TK |
3614 | binder_inner_proc_lock(proc); |
3615 | list_for_each_entry(w, &proc->delivered_death, | |
3616 | entry) { | |
3617 | struct binder_ref_death *tmp_death = | |
3618 | container_of(w, | |
3619 | struct binder_ref_death, | |
3620 | work); | |
10f62861 | 3621 | |
355b0502 GKH |
3622 | if (tmp_death->cookie == cookie) { |
3623 | death = tmp_death; | |
3624 | break; | |
3625 | } | |
3626 | } | |
3627 | binder_debug(BINDER_DEBUG_DEAD_BINDER, | |
8ca86f16 | 3628 | "%d:%d BC_DEAD_BINDER_DONE %016llx found %pK\n", |
da49889d AH |
3629 | proc->pid, thread->pid, (u64)cookie, |
3630 | death); | |
355b0502 | 3631 | if (death == NULL) { |
da49889d AH |
3632 | binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n", |
3633 | proc->pid, thread->pid, (u64)cookie); | |
72196393 | 3634 | binder_inner_proc_unlock(proc); |
355b0502 GKH |
3635 | break; |
3636 | } | |
72196393 | 3637 | binder_dequeue_work_ilocked(&death->work); |
355b0502 GKH |
3638 | if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) { |
3639 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; | |
72196393 TK |
3640 | if (thread->looper & |
3641 | (BINDER_LOOPER_STATE_REGISTERED | | |
3642 | BINDER_LOOPER_STATE_ENTERED)) | |
148ade2c MC |
3643 | binder_enqueue_thread_work_ilocked( |
3644 | thread, &death->work); | |
72196393 TK |
3645 | else { |
3646 | binder_enqueue_work_ilocked( | |
3647 | &death->work, | |
3648 | &proc->todo); | |
408c68b1 | 3649 | binder_wakeup_proc_ilocked(proc); |
355b0502 GKH |
3650 | } |
3651 | } | |
72196393 | 3652 | binder_inner_proc_unlock(proc); |
355b0502 GKH |
3653 | } break; |
3654 | ||
3655 | default: | |
56b468fc | 3656 | pr_err("%d:%d unknown command %d\n", |
355b0502 GKH |
3657 | proc->pid, thread->pid, cmd); |
3658 | return -EINVAL; | |
3659 | } | |
3660 | *consumed = ptr - buffer; | |
3661 | } | |
3662 | return 0; | |
3663 | } | |
3664 | ||
fb07ebc3 BP |
3665 | static void binder_stat_br(struct binder_proc *proc, |
3666 | struct binder_thread *thread, uint32_t cmd) | |
355b0502 | 3667 | { |
975a1ac9 | 3668 | trace_binder_return(cmd); |
355b0502 | 3669 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) { |
0953c797 BJS |
3670 | atomic_inc(&binder_stats.br[_IOC_NR(cmd)]); |
3671 | atomic_inc(&proc->stats.br[_IOC_NR(cmd)]); | |
3672 | atomic_inc(&thread->stats.br[_IOC_NR(cmd)]); | |
355b0502 GKH |
3673 | } |
3674 | } | |
3675 | ||
26b47d8a TK |
3676 | static int binder_put_node_cmd(struct binder_proc *proc, |
3677 | struct binder_thread *thread, | |
3678 | void __user **ptrp, | |
3679 | binder_uintptr_t node_ptr, | |
3680 | binder_uintptr_t node_cookie, | |
3681 | int node_debug_id, | |
3682 | uint32_t cmd, const char *cmd_name) | |
3683 | { | |
3684 | void __user *ptr = *ptrp; | |
3685 | ||
3686 | if (put_user(cmd, (uint32_t __user *)ptr)) | |
3687 | return -EFAULT; | |
3688 | ptr += sizeof(uint32_t); | |
3689 | ||
3690 | if (put_user(node_ptr, (binder_uintptr_t __user *)ptr)) | |
3691 | return -EFAULT; | |
3692 | ptr += sizeof(binder_uintptr_t); | |
3693 | ||
3694 | if (put_user(node_cookie, (binder_uintptr_t __user *)ptr)) | |
3695 | return -EFAULT; | |
3696 | ptr += sizeof(binder_uintptr_t); | |
3697 | ||
3698 | binder_stat_br(proc, thread, cmd); | |
3699 | binder_debug(BINDER_DEBUG_USER_REFS, "%d:%d %s %d u%016llx c%016llx\n", | |
3700 | proc->pid, thread->pid, cmd_name, node_debug_id, | |
3701 | (u64)node_ptr, (u64)node_cookie); | |
3702 | ||
3703 | *ptrp = ptr; | |
3704 | return 0; | |
3705 | } | |
3706 | ||
1b77e9dc MC |
3707 | static int binder_wait_for_work(struct binder_thread *thread, |
3708 | bool do_proc_work) | |
3709 | { | |
3710 | DEFINE_WAIT(wait); | |
3711 | struct binder_proc *proc = thread->proc; | |
3712 | int ret = 0; | |
3713 | ||
3714 | freezer_do_not_count(); | |
3715 | binder_inner_proc_lock(proc); | |
3716 | for (;;) { | |
3717 | prepare_to_wait(&thread->wait, &wait, TASK_INTERRUPTIBLE); | |
3718 | if (binder_has_work_ilocked(thread, do_proc_work)) | |
3719 | break; | |
3720 | if (do_proc_work) | |
3721 | list_add(&thread->waiting_thread_node, | |
3722 | &proc->waiting_threads); | |
3723 | binder_inner_proc_unlock(proc); | |
3724 | schedule(); | |
3725 | binder_inner_proc_lock(proc); | |
3726 | list_del_init(&thread->waiting_thread_node); | |
3727 | if (signal_pending(current)) { | |
95c16f9d | 3728 | ret = -EINTR; |
1b77e9dc MC |
3729 | break; |
3730 | } | |
3731 | } | |
3732 | finish_wait(&thread->wait, &wait); | |
3733 | binder_inner_proc_unlock(proc); | |
3734 | freezer_count(); | |
3735 | ||
3736 | return ret; | |
3737 | } | |
3738 | ||
44d8047f TK |
3739 | /** |
3740 | * binder_apply_fd_fixups() - finish fd translation | |
8ced0c62 | 3741 | * @proc: binder_proc associated @t->buffer |
44d8047f TK |
3742 | * @t: binder transaction with list of fd fixups |
3743 | * | |
3744 | * Now that we are in the context of the transaction target | |
3745 | * process, we can allocate and install fds. Process the | |
3746 | * list of fds to translate and fixup the buffer with the | |
3747 | * new fds. | |
3748 | * | |
3749 | * If we fail to allocate an fd, then free the resources by | |
3750 | * fput'ing files that have not been processed and ksys_close'ing | |
3751 | * any fds that have already been allocated. | |
3752 | */ | |
8ced0c62 TK |
3753 | static int binder_apply_fd_fixups(struct binder_proc *proc, |
3754 | struct binder_transaction *t) | |
44d8047f TK |
3755 | { |
3756 | struct binder_txn_fd_fixup *fixup, *tmp; | |
3757 | int ret = 0; | |
3758 | ||
3759 | list_for_each_entry(fixup, &t->fd_fixups, fixup_entry) { | |
3760 | int fd = get_unused_fd_flags(O_CLOEXEC); | |
44d8047f TK |
3761 | |
3762 | if (fd < 0) { | |
3763 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
3764 | "failed fd fixup txn %d fd %d\n", | |
3765 | t->debug_id, fd); | |
3766 | ret = -ENOMEM; | |
3767 | break; | |
3768 | } | |
3769 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
3770 | "fd fixup txn %d fd %d\n", | |
3771 | t->debug_id, fd); | |
3772 | trace_binder_transaction_fd_recv(t, fd, fixup->offset); | |
3773 | fd_install(fd, fixup->file); | |
3774 | fixup->file = NULL; | |
bb4a2e48 TK |
3775 | if (binder_alloc_copy_to_buffer(&proc->alloc, t->buffer, |
3776 | fixup->offset, &fd, | |
3777 | sizeof(u32))) { | |
3778 | ret = -EINVAL; | |
3779 | break; | |
3780 | } | |
44d8047f TK |
3781 | } |
3782 | list_for_each_entry_safe(fixup, tmp, &t->fd_fixups, fixup_entry) { | |
3783 | if (fixup->file) { | |
3784 | fput(fixup->file); | |
3785 | } else if (ret) { | |
8ced0c62 | 3786 | u32 fd; |
bb4a2e48 TK |
3787 | int err; |
3788 | ||
3789 | err = binder_alloc_copy_from_buffer(&proc->alloc, &fd, | |
3790 | t->buffer, | |
3791 | fixup->offset, | |
3792 | sizeof(fd)); | |
3793 | WARN_ON(err); | |
3794 | if (!err) | |
3795 | binder_deferred_fd_close(fd); | |
44d8047f TK |
3796 | } |
3797 | list_del(&fixup->fixup_entry); | |
3798 | kfree(fixup); | |
3799 | } | |
3800 | ||
3801 | return ret; | |
3802 | } | |
3803 | ||
355b0502 GKH |
3804 | static int binder_thread_read(struct binder_proc *proc, |
3805 | struct binder_thread *thread, | |
da49889d AH |
3806 | binder_uintptr_t binder_buffer, size_t size, |
3807 | binder_size_t *consumed, int non_block) | |
355b0502 | 3808 | { |
da49889d | 3809 | void __user *buffer = (void __user *)(uintptr_t)binder_buffer; |
355b0502 GKH |
3810 | void __user *ptr = buffer + *consumed; |
3811 | void __user *end = buffer + size; | |
3812 | ||
3813 | int ret = 0; | |
3814 | int wait_for_proc_work; | |
3815 | ||
3816 | if (*consumed == 0) { | |
3817 | if (put_user(BR_NOOP, (uint32_t __user *)ptr)) | |
3818 | return -EFAULT; | |
3819 | ptr += sizeof(uint32_t); | |
3820 | } | |
3821 | ||
3822 | retry: | |
0b89d69a | 3823 | binder_inner_proc_lock(proc); |
1b77e9dc | 3824 | wait_for_proc_work = binder_available_for_proc_work_ilocked(thread); |
0b89d69a | 3825 | binder_inner_proc_unlock(proc); |
355b0502 | 3826 | |
355b0502 | 3827 | thread->looper |= BINDER_LOOPER_STATE_WAITING; |
975a1ac9 | 3828 | |
975a1ac9 AH |
3829 | trace_binder_wait_for_work(wait_for_proc_work, |
3830 | !!thread->transaction_stack, | |
72196393 | 3831 | !binder_worklist_empty(proc, &thread->todo)); |
355b0502 GKH |
3832 | if (wait_for_proc_work) { |
3833 | if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED | | |
3834 | BINDER_LOOPER_STATE_ENTERED))) { | |
56b468fc | 3835 | 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 |
3836 | proc->pid, thread->pid, thread->looper); |
3837 | wait_event_interruptible(binder_user_error_wait, | |
3838 | binder_stop_on_user_error < 2); | |
3839 | } | |
3840 | binder_set_nice(proc->default_priority); | |
1b77e9dc MC |
3841 | } |
3842 | ||
3843 | if (non_block) { | |
3844 | if (!binder_has_work(thread, wait_for_proc_work)) | |
3845 | ret = -EAGAIN; | |
355b0502 | 3846 | } else { |
1b77e9dc | 3847 | ret = binder_wait_for_work(thread, wait_for_proc_work); |
355b0502 | 3848 | } |
975a1ac9 | 3849 | |
355b0502 GKH |
3850 | thread->looper &= ~BINDER_LOOPER_STATE_WAITING; |
3851 | ||
3852 | if (ret) | |
3853 | return ret; | |
3854 | ||
3855 | while (1) { | |
3856 | uint32_t cmd; | |
ec74136d TK |
3857 | struct binder_transaction_data_secctx tr; |
3858 | struct binder_transaction_data *trd = &tr.transaction_data; | |
72196393 TK |
3859 | struct binder_work *w = NULL; |
3860 | struct list_head *list = NULL; | |
355b0502 | 3861 | struct binder_transaction *t = NULL; |
7a4408c6 | 3862 | struct binder_thread *t_from; |
ec74136d | 3863 | size_t trsize = sizeof(*trd); |
355b0502 | 3864 | |
ed29721e | 3865 | binder_inner_proc_lock(proc); |
72196393 TK |
3866 | if (!binder_worklist_empty_ilocked(&thread->todo)) |
3867 | list = &thread->todo; | |
3868 | else if (!binder_worklist_empty_ilocked(&proc->todo) && | |
3869 | wait_for_proc_work) | |
3870 | list = &proc->todo; | |
3871 | else { | |
3872 | binder_inner_proc_unlock(proc); | |
3873 | ||
395262a9 | 3874 | /* no data added */ |
08dabcee | 3875 | if (ptr - buffer == 4 && !thread->looper_need_return) |
355b0502 GKH |
3876 | goto retry; |
3877 | break; | |
3878 | } | |
3879 | ||
ed29721e TK |
3880 | if (end - ptr < sizeof(tr) + 4) { |
3881 | binder_inner_proc_unlock(proc); | |
355b0502 | 3882 | break; |
ed29721e | 3883 | } |
72196393 | 3884 | w = binder_dequeue_work_head_ilocked(list); |
148ade2c MC |
3885 | if (binder_worklist_empty_ilocked(&thread->todo)) |
3886 | thread->process_todo = false; | |
355b0502 GKH |
3887 | |
3888 | switch (w->type) { | |
3889 | case BINDER_WORK_TRANSACTION: { | |
ed29721e | 3890 | binder_inner_proc_unlock(proc); |
355b0502 GKH |
3891 | t = container_of(w, struct binder_transaction, work); |
3892 | } break; | |
26549d17 TK |
3893 | case BINDER_WORK_RETURN_ERROR: { |
3894 | struct binder_error *e = container_of( | |
3895 | w, struct binder_error, work); | |
3896 | ||
3897 | WARN_ON(e->cmd == BR_OK); | |
ed29721e | 3898 | binder_inner_proc_unlock(proc); |
26549d17 TK |
3899 | if (put_user(e->cmd, (uint32_t __user *)ptr)) |
3900 | return -EFAULT; | |
838d5565 | 3901 | cmd = e->cmd; |
26549d17 TK |
3902 | e->cmd = BR_OK; |
3903 | ptr += sizeof(uint32_t); | |
3904 | ||
838d5565 | 3905 | binder_stat_br(proc, thread, cmd); |
26549d17 | 3906 | } break; |
a7dc1e6f HL |
3907 | case BINDER_WORK_TRANSACTION_COMPLETE: |
3908 | case BINDER_WORK_TRANSACTION_ONEWAY_SPAM_SUSPECT: { | |
3909 | if (proc->oneway_spam_detection_enabled && | |
3910 | w->type == BINDER_WORK_TRANSACTION_ONEWAY_SPAM_SUSPECT) | |
3911 | cmd = BR_ONEWAY_SPAM_SUSPECT; | |
3912 | else | |
3913 | cmd = BR_TRANSACTION_COMPLETE; | |
ed29721e | 3914 | binder_inner_proc_unlock(proc); |
1909a671 TK |
3915 | kfree(w); |
3916 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); | |
355b0502 GKH |
3917 | if (put_user(cmd, (uint32_t __user *)ptr)) |
3918 | return -EFAULT; | |
3919 | ptr += sizeof(uint32_t); | |
3920 | ||
3921 | binder_stat_br(proc, thread, cmd); | |
3922 | binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE, | |
56b468fc | 3923 | "%d:%d BR_TRANSACTION_COMPLETE\n", |
355b0502 | 3924 | proc->pid, thread->pid); |
355b0502 GKH |
3925 | } break; |
3926 | case BINDER_WORK_NODE: { | |
3927 | struct binder_node *node = container_of(w, struct binder_node, work); | |
26b47d8a TK |
3928 | int strong, weak; |
3929 | binder_uintptr_t node_ptr = node->ptr; | |
3930 | binder_uintptr_t node_cookie = node->cookie; | |
3931 | int node_debug_id = node->debug_id; | |
3932 | int has_weak_ref; | |
3933 | int has_strong_ref; | |
3934 | void __user *orig_ptr = ptr; | |
3935 | ||
3936 | BUG_ON(proc != node->proc); | |
3937 | strong = node->internal_strong_refs || | |
3938 | node->local_strong_refs; | |
3939 | weak = !hlist_empty(&node->refs) || | |
adc18842 TK |
3940 | node->local_weak_refs || |
3941 | node->tmp_refs || strong; | |
26b47d8a TK |
3942 | has_strong_ref = node->has_strong_ref; |
3943 | has_weak_ref = node->has_weak_ref; | |
3944 | ||
3945 | if (weak && !has_weak_ref) { | |
355b0502 GKH |
3946 | node->has_weak_ref = 1; |
3947 | node->pending_weak_ref = 1; | |
3948 | node->local_weak_refs++; | |
26b47d8a TK |
3949 | } |
3950 | if (strong && !has_strong_ref) { | |
355b0502 GKH |
3951 | node->has_strong_ref = 1; |
3952 | node->pending_strong_ref = 1; | |
3953 | node->local_strong_refs++; | |
26b47d8a TK |
3954 | } |
3955 | if (!strong && has_strong_ref) | |
355b0502 | 3956 | node->has_strong_ref = 0; |
26b47d8a | 3957 | if (!weak && has_weak_ref) |
355b0502 | 3958 | node->has_weak_ref = 0; |
26b47d8a TK |
3959 | if (!weak && !strong) { |
3960 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
3961 | "%d:%d node %d u%016llx c%016llx deleted\n", | |
3962 | proc->pid, thread->pid, | |
3963 | node_debug_id, | |
3964 | (u64)node_ptr, | |
3965 | (u64)node_cookie); | |
3966 | rb_erase(&node->rb_node, &proc->nodes); | |
ed29721e | 3967 | binder_inner_proc_unlock(proc); |
673068ee TK |
3968 | binder_node_lock(node); |
3969 | /* | |
3970 | * Acquire the node lock before freeing the | |
3971 | * node to serialize with other threads that | |
3972 | * may have been holding the node lock while | |
3973 | * decrementing this node (avoids race where | |
3974 | * this thread frees while the other thread | |
3975 | * is unlocking the node after the final | |
3976 | * decrement) | |
3977 | */ | |
3978 | binder_node_unlock(node); | |
ed29721e TK |
3979 | binder_free_node(node); |
3980 | } else | |
3981 | binder_inner_proc_unlock(proc); | |
3982 | ||
26b47d8a TK |
3983 | if (weak && !has_weak_ref) |
3984 | ret = binder_put_node_cmd( | |
3985 | proc, thread, &ptr, node_ptr, | |
3986 | node_cookie, node_debug_id, | |
3987 | BR_INCREFS, "BR_INCREFS"); | |
3988 | if (!ret && strong && !has_strong_ref) | |
3989 | ret = binder_put_node_cmd( | |
3990 | proc, thread, &ptr, node_ptr, | |
3991 | node_cookie, node_debug_id, | |
3992 | BR_ACQUIRE, "BR_ACQUIRE"); | |
3993 | if (!ret && !strong && has_strong_ref) | |
3994 | ret = binder_put_node_cmd( | |
3995 | proc, thread, &ptr, node_ptr, | |
3996 | node_cookie, node_debug_id, | |
3997 | BR_RELEASE, "BR_RELEASE"); | |
3998 | if (!ret && !weak && has_weak_ref) | |
3999 | ret = binder_put_node_cmd( | |
4000 | proc, thread, &ptr, node_ptr, | |
4001 | node_cookie, node_debug_id, | |
4002 | BR_DECREFS, "BR_DECREFS"); | |
4003 | if (orig_ptr == ptr) | |
4004 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
4005 | "%d:%d node %d u%016llx c%016llx state unchanged\n", | |
4006 | proc->pid, thread->pid, | |
4007 | node_debug_id, | |
4008 | (u64)node_ptr, | |
4009 | (u64)node_cookie); | |
4010 | if (ret) | |
4011 | return ret; | |
355b0502 GKH |
4012 | } break; |
4013 | case BINDER_WORK_DEAD_BINDER: | |
4014 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: | |
4015 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { | |
4016 | struct binder_ref_death *death; | |
4017 | uint32_t cmd; | |
ab51ec6b | 4018 | binder_uintptr_t cookie; |
355b0502 GKH |
4019 | |
4020 | death = container_of(w, struct binder_ref_death, work); | |
4021 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) | |
4022 | cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE; | |
4023 | else | |
4024 | cmd = BR_DEAD_BINDER; | |
ab51ec6b MC |
4025 | cookie = death->cookie; |
4026 | ||
355b0502 | 4027 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, |
da49889d | 4028 | "%d:%d %s %016llx\n", |
355b0502 GKH |
4029 | proc->pid, thread->pid, |
4030 | cmd == BR_DEAD_BINDER ? | |
4031 | "BR_DEAD_BINDER" : | |
4032 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", | |
ab51ec6b | 4033 | (u64)cookie); |
355b0502 | 4034 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) { |
ab51ec6b | 4035 | binder_inner_proc_unlock(proc); |
355b0502 GKH |
4036 | kfree(death); |
4037 | binder_stats_deleted(BINDER_STAT_DEATH); | |
ed29721e | 4038 | } else { |
72196393 TK |
4039 | binder_enqueue_work_ilocked( |
4040 | w, &proc->delivered_death); | |
ed29721e TK |
4041 | binder_inner_proc_unlock(proc); |
4042 | } | |
ab51ec6b MC |
4043 | if (put_user(cmd, (uint32_t __user *)ptr)) |
4044 | return -EFAULT; | |
4045 | ptr += sizeof(uint32_t); | |
4046 | if (put_user(cookie, | |
4047 | (binder_uintptr_t __user *)ptr)) | |
4048 | return -EFAULT; | |
4049 | ptr += sizeof(binder_uintptr_t); | |
4050 | binder_stat_br(proc, thread, cmd); | |
355b0502 GKH |
4051 | if (cmd == BR_DEAD_BINDER) |
4052 | goto done; /* DEAD_BINDER notifications can cause transactions */ | |
4053 | } break; | |
324fa64c TK |
4054 | default: |
4055 | binder_inner_proc_unlock(proc); | |
4056 | pr_err("%d:%d: bad work type %d\n", | |
4057 | proc->pid, thread->pid, w->type); | |
4058 | break; | |
355b0502 GKH |
4059 | } |
4060 | ||
4061 | if (!t) | |
4062 | continue; | |
4063 | ||
4064 | BUG_ON(t->buffer == NULL); | |
4065 | if (t->buffer->target_node) { | |
4066 | struct binder_node *target_node = t->buffer->target_node; | |
10f62861 | 4067 | |
ec74136d TK |
4068 | trd->target.ptr = target_node->ptr; |
4069 | trd->cookie = target_node->cookie; | |
355b0502 GKH |
4070 | t->saved_priority = task_nice(current); |
4071 | if (t->priority < target_node->min_priority && | |
4072 | !(t->flags & TF_ONE_WAY)) | |
4073 | binder_set_nice(t->priority); | |
4074 | else if (!(t->flags & TF_ONE_WAY) || | |
4075 | t->saved_priority > target_node->min_priority) | |
4076 | binder_set_nice(target_node->min_priority); | |
4077 | cmd = BR_TRANSACTION; | |
4078 | } else { | |
ec74136d TK |
4079 | trd->target.ptr = 0; |
4080 | trd->cookie = 0; | |
355b0502 GKH |
4081 | cmd = BR_REPLY; |
4082 | } | |
ec74136d TK |
4083 | trd->code = t->code; |
4084 | trd->flags = t->flags; | |
4085 | trd->sender_euid = from_kuid(current_user_ns(), t->sender_euid); | |
355b0502 | 4086 | |
7a4408c6 TK |
4087 | t_from = binder_get_txn_from(t); |
4088 | if (t_from) { | |
4089 | struct task_struct *sender = t_from->proc->tsk; | |
10f62861 | 4090 | |
ec74136d TK |
4091 | trd->sender_pid = |
4092 | task_tgid_nr_ns(sender, | |
4093 | task_active_pid_ns(current)); | |
355b0502 | 4094 | } else { |
ec74136d | 4095 | trd->sender_pid = 0; |
355b0502 GKH |
4096 | } |
4097 | ||
8ced0c62 | 4098 | ret = binder_apply_fd_fixups(proc, t); |
44d8047f TK |
4099 | if (ret) { |
4100 | struct binder_buffer *buffer = t->buffer; | |
4101 | bool oneway = !!(t->flags & TF_ONE_WAY); | |
4102 | int tid = t->debug_id; | |
4103 | ||
4104 | if (t_from) | |
4105 | binder_thread_dec_tmpref(t_from); | |
4106 | buffer->transaction = NULL; | |
4107 | binder_cleanup_transaction(t, "fd fixups failed", | |
4108 | BR_FAILED_REPLY); | |
4109 | binder_free_buf(proc, buffer); | |
4110 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, | |
4111 | "%d:%d %stransaction %d fd fixups failed %d/%d, line %d\n", | |
4112 | proc->pid, thread->pid, | |
4113 | oneway ? "async " : | |
4114 | (cmd == BR_REPLY ? "reply " : ""), | |
4115 | tid, BR_FAILED_REPLY, ret, __LINE__); | |
4116 | if (cmd == BR_REPLY) { | |
4117 | cmd = BR_FAILED_REPLY; | |
4118 | if (put_user(cmd, (uint32_t __user *)ptr)) | |
4119 | return -EFAULT; | |
4120 | ptr += sizeof(uint32_t); | |
4121 | binder_stat_br(proc, thread, cmd); | |
4122 | break; | |
4123 | } | |
4124 | continue; | |
4125 | } | |
ec74136d TK |
4126 | trd->data_size = t->buffer->data_size; |
4127 | trd->offsets_size = t->buffer->offsets_size; | |
bde4a19f | 4128 | trd->data.ptr.buffer = (uintptr_t)t->buffer->user_data; |
ec74136d | 4129 | trd->data.ptr.offsets = trd->data.ptr.buffer + |
355b0502 GKH |
4130 | ALIGN(t->buffer->data_size, |
4131 | sizeof(void *)); | |
4132 | ||
ec74136d TK |
4133 | tr.secctx = t->security_ctx; |
4134 | if (t->security_ctx) { | |
4135 | cmd = BR_TRANSACTION_SEC_CTX; | |
4136 | trsize = sizeof(tr); | |
4137 | } | |
7a4408c6 TK |
4138 | if (put_user(cmd, (uint32_t __user *)ptr)) { |
4139 | if (t_from) | |
4140 | binder_thread_dec_tmpref(t_from); | |
fb2c4452 MC |
4141 | |
4142 | binder_cleanup_transaction(t, "put_user failed", | |
4143 | BR_FAILED_REPLY); | |
4144 | ||
355b0502 | 4145 | return -EFAULT; |
7a4408c6 | 4146 | } |
355b0502 | 4147 | ptr += sizeof(uint32_t); |
ec74136d | 4148 | if (copy_to_user(ptr, &tr, trsize)) { |
7a4408c6 TK |
4149 | if (t_from) |
4150 | binder_thread_dec_tmpref(t_from); | |
fb2c4452 MC |
4151 | |
4152 | binder_cleanup_transaction(t, "copy_to_user failed", | |
4153 | BR_FAILED_REPLY); | |
4154 | ||
355b0502 | 4155 | return -EFAULT; |
7a4408c6 | 4156 | } |
ec74136d | 4157 | ptr += trsize; |
355b0502 | 4158 | |
975a1ac9 | 4159 | trace_binder_transaction_received(t); |
355b0502 GKH |
4160 | binder_stat_br(proc, thread, cmd); |
4161 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
da49889d | 4162 | "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n", |
355b0502 GKH |
4163 | proc->pid, thread->pid, |
4164 | (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" : | |
ec74136d TK |
4165 | (cmd == BR_TRANSACTION_SEC_CTX) ? |
4166 | "BR_TRANSACTION_SEC_CTX" : "BR_REPLY", | |
7a4408c6 TK |
4167 | t->debug_id, t_from ? t_from->proc->pid : 0, |
4168 | t_from ? t_from->pid : 0, cmd, | |
355b0502 | 4169 | t->buffer->data_size, t->buffer->offsets_size, |
ec74136d TK |
4170 | (u64)trd->data.ptr.buffer, |
4171 | (u64)trd->data.ptr.offsets); | |
355b0502 | 4172 | |
7a4408c6 TK |
4173 | if (t_from) |
4174 | binder_thread_dec_tmpref(t_from); | |
355b0502 | 4175 | t->buffer->allow_user_free = 1; |
ec74136d | 4176 | if (cmd != BR_REPLY && !(t->flags & TF_ONE_WAY)) { |
0b89d69a | 4177 | binder_inner_proc_lock(thread->proc); |
355b0502 GKH |
4178 | t->to_parent = thread->transaction_stack; |
4179 | t->to_thread = thread; | |
4180 | thread->transaction_stack = t; | |
0b89d69a | 4181 | binder_inner_proc_unlock(thread->proc); |
355b0502 | 4182 | } else { |
b6d282ce | 4183 | binder_free_transaction(t); |
355b0502 GKH |
4184 | } |
4185 | break; | |
4186 | } | |
4187 | ||
4188 | done: | |
4189 | ||
4190 | *consumed = ptr - buffer; | |
b3e68612 | 4191 | binder_inner_proc_lock(proc); |
1b77e9dc MC |
4192 | if (proc->requested_threads == 0 && |
4193 | list_empty(&thread->proc->waiting_threads) && | |
355b0502 GKH |
4194 | proc->requested_threads_started < proc->max_threads && |
4195 | (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | | |
4196 | BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */ | |
4197 | /*spawn a new thread if we leave this out */) { | |
4198 | proc->requested_threads++; | |
b3e68612 | 4199 | binder_inner_proc_unlock(proc); |
355b0502 | 4200 | binder_debug(BINDER_DEBUG_THREADS, |
56b468fc | 4201 | "%d:%d BR_SPAWN_LOOPER\n", |
355b0502 GKH |
4202 | proc->pid, thread->pid); |
4203 | if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer)) | |
4204 | return -EFAULT; | |
89334ab4 | 4205 | binder_stat_br(proc, thread, BR_SPAWN_LOOPER); |
b3e68612 TK |
4206 | } else |
4207 | binder_inner_proc_unlock(proc); | |
355b0502 GKH |
4208 | return 0; |
4209 | } | |
4210 | ||
72196393 TK |
4211 | static void binder_release_work(struct binder_proc *proc, |
4212 | struct list_head *list) | |
355b0502 GKH |
4213 | { |
4214 | struct binder_work *w; | |
f3277cbf | 4215 | enum binder_work_type wtype; |
10f62861 | 4216 | |
72196393 | 4217 | while (1) { |
f3277cbf TK |
4218 | binder_inner_proc_lock(proc); |
4219 | w = binder_dequeue_work_head_ilocked(list); | |
4220 | wtype = w ? w->type : 0; | |
4221 | binder_inner_proc_unlock(proc); | |
72196393 TK |
4222 | if (!w) |
4223 | return; | |
4224 | ||
f3277cbf | 4225 | switch (wtype) { |
355b0502 GKH |
4226 | case BINDER_WORK_TRANSACTION: { |
4227 | struct binder_transaction *t; | |
4228 | ||
4229 | t = container_of(w, struct binder_transaction, work); | |
fb2c4452 MC |
4230 | |
4231 | binder_cleanup_transaction(t, "process died.", | |
4232 | BR_DEAD_REPLY); | |
355b0502 | 4233 | } break; |
26549d17 TK |
4234 | case BINDER_WORK_RETURN_ERROR: { |
4235 | struct binder_error *e = container_of( | |
4236 | w, struct binder_error, work); | |
4237 | ||
4238 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, | |
4239 | "undelivered TRANSACTION_ERROR: %u\n", | |
4240 | e->cmd); | |
4241 | } break; | |
355b0502 | 4242 | case BINDER_WORK_TRANSACTION_COMPLETE: { |
675d66b0 | 4243 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
56b468fc | 4244 | "undelivered TRANSACTION_COMPLETE\n"); |
355b0502 GKH |
4245 | kfree(w); |
4246 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); | |
4247 | } break; | |
675d66b0 AH |
4248 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
4249 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { | |
4250 | struct binder_ref_death *death; | |
4251 | ||
4252 | death = container_of(w, struct binder_ref_death, work); | |
4253 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, | |
da49889d AH |
4254 | "undelivered death notification, %016llx\n", |
4255 | (u64)death->cookie); | |
675d66b0 AH |
4256 | kfree(death); |
4257 | binder_stats_deleted(BINDER_STAT_DEATH); | |
4258 | } break; | |
f3277cbf TK |
4259 | case BINDER_WORK_NODE: |
4260 | break; | |
355b0502 | 4261 | default: |
56b468fc | 4262 | pr_err("unexpected work type, %d, not freed\n", |
f3277cbf | 4263 | wtype); |
355b0502 GKH |
4264 | break; |
4265 | } | |
4266 | } | |
4267 | ||
4268 | } | |
4269 | ||
7bd7b0e6 TK |
4270 | static struct binder_thread *binder_get_thread_ilocked( |
4271 | struct binder_proc *proc, struct binder_thread *new_thread) | |
355b0502 GKH |
4272 | { |
4273 | struct binder_thread *thread = NULL; | |
4274 | struct rb_node *parent = NULL; | |
4275 | struct rb_node **p = &proc->threads.rb_node; | |
4276 | ||
4277 | while (*p) { | |
4278 | parent = *p; | |
4279 | thread = rb_entry(parent, struct binder_thread, rb_node); | |
4280 | ||
4281 | if (current->pid < thread->pid) | |
4282 | p = &(*p)->rb_left; | |
4283 | else if (current->pid > thread->pid) | |
4284 | p = &(*p)->rb_right; | |
4285 | else | |
7bd7b0e6 | 4286 | return thread; |
355b0502 | 4287 | } |
7bd7b0e6 TK |
4288 | if (!new_thread) |
4289 | return NULL; | |
4290 | thread = new_thread; | |
4291 | binder_stats_created(BINDER_STAT_THREAD); | |
4292 | thread->proc = proc; | |
4293 | thread->pid = current->pid; | |
4294 | atomic_set(&thread->tmp_ref, 0); | |
4295 | init_waitqueue_head(&thread->wait); | |
4296 | INIT_LIST_HEAD(&thread->todo); | |
4297 | rb_link_node(&thread->rb_node, parent, p); | |
4298 | rb_insert_color(&thread->rb_node, &proc->threads); | |
4299 | thread->looper_need_return = true; | |
4300 | thread->return_error.work.type = BINDER_WORK_RETURN_ERROR; | |
4301 | thread->return_error.cmd = BR_OK; | |
4302 | thread->reply_error.work.type = BINDER_WORK_RETURN_ERROR; | |
4303 | thread->reply_error.cmd = BR_OK; | |
1b77e9dc | 4304 | INIT_LIST_HEAD(&new_thread->waiting_thread_node); |
7bd7b0e6 TK |
4305 | return thread; |
4306 | } | |
4307 | ||
4308 | static struct binder_thread *binder_get_thread(struct binder_proc *proc) | |
4309 | { | |
4310 | struct binder_thread *thread; | |
4311 | struct binder_thread *new_thread; | |
4312 | ||
4313 | binder_inner_proc_lock(proc); | |
4314 | thread = binder_get_thread_ilocked(proc, NULL); | |
4315 | binder_inner_proc_unlock(proc); | |
4316 | if (!thread) { | |
4317 | new_thread = kzalloc(sizeof(*thread), GFP_KERNEL); | |
4318 | if (new_thread == NULL) | |
355b0502 | 4319 | return NULL; |
7bd7b0e6 TK |
4320 | binder_inner_proc_lock(proc); |
4321 | thread = binder_get_thread_ilocked(proc, new_thread); | |
4322 | binder_inner_proc_unlock(proc); | |
4323 | if (thread != new_thread) | |
4324 | kfree(new_thread); | |
355b0502 GKH |
4325 | } |
4326 | return thread; | |
4327 | } | |
4328 | ||
7a4408c6 TK |
4329 | static void binder_free_proc(struct binder_proc *proc) |
4330 | { | |
d35d3660 TK |
4331 | struct binder_device *device; |
4332 | ||
7a4408c6 TK |
4333 | BUG_ON(!list_empty(&proc->todo)); |
4334 | BUG_ON(!list_empty(&proc->delivered_death)); | |
432ff1e9 MB |
4335 | if (proc->outstanding_txns) |
4336 | pr_warn("%s: Unexpected outstanding_txns %d\n", | |
4337 | __func__, proc->outstanding_txns); | |
d35d3660 TK |
4338 | device = container_of(proc->context, struct binder_device, context); |
4339 | if (refcount_dec_and_test(&device->ref)) { | |
4340 | kfree(proc->context->name); | |
4341 | kfree(device); | |
4342 | } | |
7a4408c6 TK |
4343 | binder_alloc_deferred_release(&proc->alloc); |
4344 | put_task_struct(proc->tsk); | |
4345 | binder_stats_deleted(BINDER_STAT_PROC); | |
4346 | kfree(proc); | |
4347 | } | |
4348 | ||
4349 | static void binder_free_thread(struct binder_thread *thread) | |
4350 | { | |
4351 | BUG_ON(!list_empty(&thread->todo)); | |
4352 | binder_stats_deleted(BINDER_STAT_THREAD); | |
4353 | binder_proc_dec_tmpref(thread->proc); | |
4354 | kfree(thread); | |
4355 | } | |
4356 | ||
4357 | static int binder_thread_release(struct binder_proc *proc, | |
4358 | struct binder_thread *thread) | |
355b0502 GKH |
4359 | { |
4360 | struct binder_transaction *t; | |
4361 | struct binder_transaction *send_reply = NULL; | |
4362 | int active_transactions = 0; | |
7a4408c6 | 4363 | struct binder_transaction *last_t = NULL; |
355b0502 | 4364 | |
7bd7b0e6 | 4365 | binder_inner_proc_lock(thread->proc); |
7a4408c6 TK |
4366 | /* |
4367 | * take a ref on the proc so it survives | |
4368 | * after we remove this thread from proc->threads. | |
4369 | * The corresponding dec is when we actually | |
4370 | * free the thread in binder_free_thread() | |
4371 | */ | |
4372 | proc->tmp_ref++; | |
4373 | /* | |
4374 | * take a ref on this thread to ensure it | |
4375 | * survives while we are releasing it | |
4376 | */ | |
4377 | atomic_inc(&thread->tmp_ref); | |
355b0502 GKH |
4378 | rb_erase(&thread->rb_node, &proc->threads); |
4379 | t = thread->transaction_stack; | |
7a4408c6 TK |
4380 | if (t) { |
4381 | spin_lock(&t->lock); | |
4382 | if (t->to_thread == thread) | |
4383 | send_reply = t; | |
324fa64c TK |
4384 | } else { |
4385 | __acquire(&t->lock); | |
7a4408c6 TK |
4386 | } |
4387 | thread->is_dead = true; | |
4388 | ||
355b0502 | 4389 | while (t) { |
7a4408c6 | 4390 | last_t = t; |
355b0502 GKH |
4391 | active_transactions++; |
4392 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, | |
56b468fc AS |
4393 | "release %d:%d transaction %d %s, still active\n", |
4394 | proc->pid, thread->pid, | |
355b0502 GKH |
4395 | t->debug_id, |
4396 | (t->to_thread == thread) ? "in" : "out"); | |
4397 | ||
4398 | if (t->to_thread == thread) { | |
432ff1e9 | 4399 | thread->proc->outstanding_txns--; |
355b0502 GKH |
4400 | t->to_proc = NULL; |
4401 | t->to_thread = NULL; | |
4402 | if (t->buffer) { | |
4403 | t->buffer->transaction = NULL; | |
4404 | t->buffer = NULL; | |
4405 | } | |
4406 | t = t->to_parent; | |
4407 | } else if (t->from == thread) { | |
4408 | t->from = NULL; | |
4409 | t = t->from_parent; | |
4410 | } else | |
4411 | BUG(); | |
7a4408c6 TK |
4412 | spin_unlock(&last_t->lock); |
4413 | if (t) | |
4414 | spin_lock(&t->lock); | |
324fa64c TK |
4415 | else |
4416 | __acquire(&t->lock); | |
355b0502 | 4417 | } |
324fa64c TK |
4418 | /* annotation for sparse, lock not acquired in last iteration above */ |
4419 | __release(&t->lock); | |
f5cb779b MC |
4420 | |
4421 | /* | |
4422 | * If this thread used poll, make sure we remove the waitqueue | |
4423 | * from any epoll data structures holding it with POLLFREE. | |
4424 | * waitqueue_active() is safe to use here because we're holding | |
4425 | * the inner lock. | |
4426 | */ | |
4427 | if ((thread->looper & BINDER_LOOPER_STATE_POLL) && | |
4428 | waitqueue_active(&thread->wait)) { | |
a9a08845 | 4429 | wake_up_poll(&thread->wait, EPOLLHUP | POLLFREE); |
f5cb779b MC |
4430 | } |
4431 | ||
7bd7b0e6 | 4432 | binder_inner_proc_unlock(thread->proc); |
7a4408c6 | 4433 | |
5eeb2ca0 MC |
4434 | /* |
4435 | * This is needed to avoid races between wake_up_poll() above and | |
4436 | * and ep_remove_waitqueue() called for other reasons (eg the epoll file | |
4437 | * descriptor being closed); ep_remove_waitqueue() holds an RCU read | |
4438 | * lock, so we can be sure it's done after calling synchronize_rcu(). | |
4439 | */ | |
4440 | if (thread->looper & BINDER_LOOPER_STATE_POLL) | |
4441 | synchronize_rcu(); | |
4442 | ||
355b0502 GKH |
4443 | if (send_reply) |
4444 | binder_send_failed_reply(send_reply, BR_DEAD_REPLY); | |
72196393 | 4445 | binder_release_work(proc, &thread->todo); |
7a4408c6 | 4446 | binder_thread_dec_tmpref(thread); |
355b0502 GKH |
4447 | return active_transactions; |
4448 | } | |
4449 | ||
afc9a42b | 4450 | static __poll_t binder_poll(struct file *filp, |
355b0502 GKH |
4451 | struct poll_table_struct *wait) |
4452 | { | |
4453 | struct binder_proc *proc = filp->private_data; | |
4454 | struct binder_thread *thread = NULL; | |
1b77e9dc | 4455 | bool wait_for_proc_work; |
355b0502 | 4456 | |
355b0502 | 4457 | thread = binder_get_thread(proc); |
f8898267 EB |
4458 | if (!thread) |
4459 | return POLLERR; | |
355b0502 | 4460 | |
0b89d69a | 4461 | binder_inner_proc_lock(thread->proc); |
1b77e9dc MC |
4462 | thread->looper |= BINDER_LOOPER_STATE_POLL; |
4463 | wait_for_proc_work = binder_available_for_proc_work_ilocked(thread); | |
4464 | ||
0b89d69a | 4465 | binder_inner_proc_unlock(thread->proc); |
975a1ac9 | 4466 | |
1b77e9dc MC |
4467 | poll_wait(filp, &thread->wait, wait); |
4468 | ||
66b83a4c | 4469 | if (binder_has_work(thread, wait_for_proc_work)) |
a9a08845 | 4470 | return EPOLLIN; |
1b77e9dc | 4471 | |
355b0502 GKH |
4472 | return 0; |
4473 | } | |
4474 | ||
78260ac6 TR |
4475 | static int binder_ioctl_write_read(struct file *filp, |
4476 | unsigned int cmd, unsigned long arg, | |
4477 | struct binder_thread *thread) | |
4478 | { | |
4479 | int ret = 0; | |
4480 | struct binder_proc *proc = filp->private_data; | |
4481 | unsigned int size = _IOC_SIZE(cmd); | |
4482 | void __user *ubuf = (void __user *)arg; | |
4483 | struct binder_write_read bwr; | |
4484 | ||
4485 | if (size != sizeof(struct binder_write_read)) { | |
4486 | ret = -EINVAL; | |
4487 | goto out; | |
4488 | } | |
4489 | if (copy_from_user(&bwr, ubuf, sizeof(bwr))) { | |
4490 | ret = -EFAULT; | |
4491 | goto out; | |
4492 | } | |
4493 | binder_debug(BINDER_DEBUG_READ_WRITE, | |
4494 | "%d:%d write %lld at %016llx, read %lld at %016llx\n", | |
4495 | proc->pid, thread->pid, | |
4496 | (u64)bwr.write_size, (u64)bwr.write_buffer, | |
4497 | (u64)bwr.read_size, (u64)bwr.read_buffer); | |
4498 | ||
4499 | if (bwr.write_size > 0) { | |
4500 | ret = binder_thread_write(proc, thread, | |
4501 | bwr.write_buffer, | |
4502 | bwr.write_size, | |
4503 | &bwr.write_consumed); | |
4504 | trace_binder_write_done(ret); | |
4505 | if (ret < 0) { | |
4506 | bwr.read_consumed = 0; | |
4507 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) | |
4508 | ret = -EFAULT; | |
4509 | goto out; | |
4510 | } | |
4511 | } | |
4512 | if (bwr.read_size > 0) { | |
4513 | ret = binder_thread_read(proc, thread, bwr.read_buffer, | |
4514 | bwr.read_size, | |
4515 | &bwr.read_consumed, | |
4516 | filp->f_flags & O_NONBLOCK); | |
4517 | trace_binder_read_done(ret); | |
1b77e9dc MC |
4518 | binder_inner_proc_lock(proc); |
4519 | if (!binder_worklist_empty_ilocked(&proc->todo)) | |
408c68b1 | 4520 | binder_wakeup_proc_ilocked(proc); |
1b77e9dc | 4521 | binder_inner_proc_unlock(proc); |
78260ac6 TR |
4522 | if (ret < 0) { |
4523 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) | |
4524 | ret = -EFAULT; | |
4525 | goto out; | |
4526 | } | |
4527 | } | |
4528 | binder_debug(BINDER_DEBUG_READ_WRITE, | |
4529 | "%d:%d wrote %lld of %lld, read return %lld of %lld\n", | |
4530 | proc->pid, thread->pid, | |
4531 | (u64)bwr.write_consumed, (u64)bwr.write_size, | |
4532 | (u64)bwr.read_consumed, (u64)bwr.read_size); | |
4533 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) { | |
4534 | ret = -EFAULT; | |
4535 | goto out; | |
4536 | } | |
4537 | out: | |
4538 | return ret; | |
4539 | } | |
4540 | ||
ec74136d TK |
4541 | static int binder_ioctl_set_ctx_mgr(struct file *filp, |
4542 | struct flat_binder_object *fbo) | |
78260ac6 TR |
4543 | { |
4544 | int ret = 0; | |
4545 | struct binder_proc *proc = filp->private_data; | |
342e5c90 | 4546 | struct binder_context *context = proc->context; |
c44b1231 | 4547 | struct binder_node *new_node; |
78260ac6 TR |
4548 | kuid_t curr_euid = current_euid(); |
4549 | ||
c44b1231 | 4550 | mutex_lock(&context->context_mgr_node_lock); |
342e5c90 | 4551 | if (context->binder_context_mgr_node) { |
78260ac6 TR |
4552 | pr_err("BINDER_SET_CONTEXT_MGR already set\n"); |
4553 | ret = -EBUSY; | |
4554 | goto out; | |
4555 | } | |
79af7307 SS |
4556 | ret = security_binder_set_context_mgr(proc->tsk); |
4557 | if (ret < 0) | |
4558 | goto out; | |
342e5c90 MC |
4559 | if (uid_valid(context->binder_context_mgr_uid)) { |
4560 | if (!uid_eq(context->binder_context_mgr_uid, curr_euid)) { | |
78260ac6 TR |
4561 | pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n", |
4562 | from_kuid(&init_user_ns, curr_euid), | |
4563 | from_kuid(&init_user_ns, | |
342e5c90 | 4564 | context->binder_context_mgr_uid)); |
78260ac6 TR |
4565 | ret = -EPERM; |
4566 | goto out; | |
4567 | } | |
4568 | } else { | |
342e5c90 | 4569 | context->binder_context_mgr_uid = curr_euid; |
78260ac6 | 4570 | } |
ec74136d | 4571 | new_node = binder_new_node(proc, fbo); |
c44b1231 | 4572 | if (!new_node) { |
78260ac6 TR |
4573 | ret = -ENOMEM; |
4574 | goto out; | |
4575 | } | |
673068ee | 4576 | binder_node_lock(new_node); |
c44b1231 TK |
4577 | new_node->local_weak_refs++; |
4578 | new_node->local_strong_refs++; | |
4579 | new_node->has_strong_ref = 1; | |
4580 | new_node->has_weak_ref = 1; | |
4581 | context->binder_context_mgr_node = new_node; | |
673068ee | 4582 | binder_node_unlock(new_node); |
adc18842 | 4583 | binder_put_node(new_node); |
78260ac6 | 4584 | out: |
c44b1231 | 4585 | mutex_unlock(&context->context_mgr_node_lock); |
78260ac6 TR |
4586 | return ret; |
4587 | } | |
4588 | ||
b7e6a896 MC |
4589 | static int binder_ioctl_get_node_info_for_ref(struct binder_proc *proc, |
4590 | struct binder_node_info_for_ref *info) | |
4591 | { | |
4592 | struct binder_node *node; | |
4593 | struct binder_context *context = proc->context; | |
4594 | __u32 handle = info->handle; | |
4595 | ||
4596 | if (info->strong_count || info->weak_count || info->reserved1 || | |
4597 | info->reserved2 || info->reserved3) { | |
4598 | binder_user_error("%d BINDER_GET_NODE_INFO_FOR_REF: only handle may be non-zero.", | |
4599 | proc->pid); | |
4600 | return -EINVAL; | |
4601 | } | |
4602 | ||
4603 | /* This ioctl may only be used by the context manager */ | |
4604 | mutex_lock(&context->context_mgr_node_lock); | |
4605 | if (!context->binder_context_mgr_node || | |
4606 | context->binder_context_mgr_node->proc != proc) { | |
4607 | mutex_unlock(&context->context_mgr_node_lock); | |
4608 | return -EPERM; | |
4609 | } | |
4610 | mutex_unlock(&context->context_mgr_node_lock); | |
4611 | ||
4612 | node = binder_get_node_from_ref(proc, handle, true, NULL); | |
4613 | if (!node) | |
4614 | return -EINVAL; | |
4615 | ||
4616 | info->strong_count = node->local_strong_refs + | |
4617 | node->internal_strong_refs; | |
4618 | info->weak_count = node->local_weak_refs; | |
4619 | ||
4620 | binder_put_node(node); | |
4621 | ||
4622 | return 0; | |
4623 | } | |
4624 | ||
abcc6153 CC |
4625 | static int binder_ioctl_get_node_debug_info(struct binder_proc *proc, |
4626 | struct binder_node_debug_info *info) | |
4627 | { | |
4628 | struct rb_node *n; | |
4629 | binder_uintptr_t ptr = info->ptr; | |
4630 | ||
4631 | memset(info, 0, sizeof(*info)); | |
4632 | ||
4633 | binder_inner_proc_lock(proc); | |
4634 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) { | |
4635 | struct binder_node *node = rb_entry(n, struct binder_node, | |
4636 | rb_node); | |
4637 | if (node->ptr > ptr) { | |
4638 | info->ptr = node->ptr; | |
4639 | info->cookie = node->cookie; | |
4640 | info->has_strong_ref = node->has_strong_ref; | |
4641 | info->has_weak_ref = node->has_weak_ref; | |
4642 | break; | |
4643 | } | |
4644 | } | |
4645 | binder_inner_proc_unlock(proc); | |
4646 | ||
4647 | return 0; | |
4648 | } | |
4649 | ||
b564171a LL |
4650 | static bool binder_txns_pending_ilocked(struct binder_proc *proc) |
4651 | { | |
4652 | struct rb_node *n; | |
4653 | struct binder_thread *thread; | |
4654 | ||
4655 | if (proc->outstanding_txns > 0) | |
4656 | return true; | |
4657 | ||
4658 | for (n = rb_first(&proc->threads); n; n = rb_next(n)) { | |
4659 | thread = rb_entry(n, struct binder_thread, rb_node); | |
4660 | if (thread->transaction_stack) | |
4661 | return true; | |
4662 | } | |
4663 | return false; | |
4664 | } | |
4665 | ||
432ff1e9 MB |
4666 | static int binder_ioctl_freeze(struct binder_freeze_info *info, |
4667 | struct binder_proc *target_proc) | |
4668 | { | |
4669 | int ret = 0; | |
4670 | ||
4671 | if (!info->enable) { | |
4672 | binder_inner_proc_lock(target_proc); | |
ae28c1be MB |
4673 | target_proc->sync_recv = false; |
4674 | target_proc->async_recv = false; | |
432ff1e9 MB |
4675 | target_proc->is_frozen = false; |
4676 | binder_inner_proc_unlock(target_proc); | |
4677 | return 0; | |
4678 | } | |
4679 | ||
4680 | /* | |
4681 | * Freezing the target. Prevent new transactions by | |
4682 | * setting frozen state. If timeout specified, wait | |
4683 | * for transactions to drain. | |
4684 | */ | |
4685 | binder_inner_proc_lock(target_proc); | |
ae28c1be MB |
4686 | target_proc->sync_recv = false; |
4687 | target_proc->async_recv = false; | |
432ff1e9 MB |
4688 | target_proc->is_frozen = true; |
4689 | binder_inner_proc_unlock(target_proc); | |
4690 | ||
4691 | if (info->timeout_ms > 0) | |
4692 | ret = wait_event_interruptible_timeout( | |
4693 | target_proc->freeze_wait, | |
4694 | (!target_proc->outstanding_txns), | |
4695 | msecs_to_jiffies(info->timeout_ms)); | |
4696 | ||
b564171a LL |
4697 | /* Check pending transactions that wait for reply */ |
4698 | if (ret >= 0) { | |
4699 | binder_inner_proc_lock(target_proc); | |
4700 | if (binder_txns_pending_ilocked(target_proc)) | |
4701 | ret = -EAGAIN; | |
4702 | binder_inner_proc_unlock(target_proc); | |
4703 | } | |
432ff1e9 MB |
4704 | |
4705 | if (ret < 0) { | |
4706 | binder_inner_proc_lock(target_proc); | |
4707 | target_proc->is_frozen = false; | |
4708 | binder_inner_proc_unlock(target_proc); | |
4709 | } | |
4710 | ||
4711 | return ret; | |
4712 | } | |
4713 | ||
ae28c1be MB |
4714 | static int binder_ioctl_get_freezer_info( |
4715 | struct binder_frozen_status_info *info) | |
4716 | { | |
4717 | struct binder_proc *target_proc; | |
4718 | bool found = false; | |
b564171a | 4719 | __u32 txns_pending; |
ae28c1be MB |
4720 | |
4721 | info->sync_recv = 0; | |
4722 | info->async_recv = 0; | |
4723 | ||
4724 | mutex_lock(&binder_procs_lock); | |
4725 | hlist_for_each_entry(target_proc, &binder_procs, proc_node) { | |
4726 | if (target_proc->pid == info->pid) { | |
4727 | found = true; | |
4728 | binder_inner_proc_lock(target_proc); | |
b564171a LL |
4729 | txns_pending = binder_txns_pending_ilocked(target_proc); |
4730 | info->sync_recv |= target_proc->sync_recv | | |
4731 | (txns_pending << 1); | |
ae28c1be MB |
4732 | info->async_recv |= target_proc->async_recv; |
4733 | binder_inner_proc_unlock(target_proc); | |
4734 | } | |
4735 | } | |
4736 | mutex_unlock(&binder_procs_lock); | |
4737 | ||
4738 | if (!found) | |
4739 | return -EINVAL; | |
4740 | ||
4741 | return 0; | |
4742 | } | |
4743 | ||
355b0502 GKH |
4744 | static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
4745 | { | |
4746 | int ret; | |
4747 | struct binder_proc *proc = filp->private_data; | |
4748 | struct binder_thread *thread; | |
4749 | unsigned int size = _IOC_SIZE(cmd); | |
4750 | void __user *ubuf = (void __user *)arg; | |
4751 | ||
78260ac6 TR |
4752 | /*pr_info("binder_ioctl: %d:%d %x %lx\n", |
4753 | proc->pid, current->pid, cmd, arg);*/ | |
355b0502 | 4754 | |
4175e2b4 SY |
4755 | binder_selftest_alloc(&proc->alloc); |
4756 | ||
975a1ac9 AH |
4757 | trace_binder_ioctl(cmd, arg); |
4758 | ||
355b0502 GKH |
4759 | ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
4760 | if (ret) | |
975a1ac9 | 4761 | goto err_unlocked; |
355b0502 | 4762 | |
355b0502 GKH |
4763 | thread = binder_get_thread(proc); |
4764 | if (thread == NULL) { | |
4765 | ret = -ENOMEM; | |
4766 | goto err; | |
4767 | } | |
4768 | ||
4769 | switch (cmd) { | |
78260ac6 TR |
4770 | case BINDER_WRITE_READ: |
4771 | ret = binder_ioctl_write_read(filp, cmd, arg, thread); | |
4772 | if (ret) | |
355b0502 | 4773 | goto err; |
355b0502 | 4774 | break; |
b3e68612 TK |
4775 | case BINDER_SET_MAX_THREADS: { |
4776 | int max_threads; | |
4777 | ||
4778 | if (copy_from_user(&max_threads, ubuf, | |
4779 | sizeof(max_threads))) { | |
355b0502 GKH |
4780 | ret = -EINVAL; |
4781 | goto err; | |
4782 | } | |
b3e68612 TK |
4783 | binder_inner_proc_lock(proc); |
4784 | proc->max_threads = max_threads; | |
4785 | binder_inner_proc_unlock(proc); | |
355b0502 | 4786 | break; |
b3e68612 | 4787 | } |
ec74136d TK |
4788 | case BINDER_SET_CONTEXT_MGR_EXT: { |
4789 | struct flat_binder_object fbo; | |
4790 | ||
4791 | if (copy_from_user(&fbo, ubuf, sizeof(fbo))) { | |
4792 | ret = -EINVAL; | |
4793 | goto err; | |
4794 | } | |
4795 | ret = binder_ioctl_set_ctx_mgr(filp, &fbo); | |
4796 | if (ret) | |
4797 | goto err; | |
4798 | break; | |
4799 | } | |
355b0502 | 4800 | case BINDER_SET_CONTEXT_MGR: |
ec74136d | 4801 | ret = binder_ioctl_set_ctx_mgr(filp, NULL); |
78260ac6 | 4802 | if (ret) |
355b0502 | 4803 | goto err; |
355b0502 GKH |
4804 | break; |
4805 | case BINDER_THREAD_EXIT: | |
56b468fc | 4806 | binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n", |
355b0502 | 4807 | proc->pid, thread->pid); |
7a4408c6 | 4808 | binder_thread_release(proc, thread); |
355b0502 GKH |
4809 | thread = NULL; |
4810 | break; | |
36c89c0a MM |
4811 | case BINDER_VERSION: { |
4812 | struct binder_version __user *ver = ubuf; | |
4813 | ||
355b0502 GKH |
4814 | if (size != sizeof(struct binder_version)) { |
4815 | ret = -EINVAL; | |
4816 | goto err; | |
4817 | } | |
36c89c0a MM |
4818 | if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, |
4819 | &ver->protocol_version)) { | |
355b0502 GKH |
4820 | ret = -EINVAL; |
4821 | goto err; | |
4822 | } | |
4823 | break; | |
36c89c0a | 4824 | } |
b7e6a896 MC |
4825 | case BINDER_GET_NODE_INFO_FOR_REF: { |
4826 | struct binder_node_info_for_ref info; | |
4827 | ||
4828 | if (copy_from_user(&info, ubuf, sizeof(info))) { | |
4829 | ret = -EFAULT; | |
4830 | goto err; | |
4831 | } | |
4832 | ||
4833 | ret = binder_ioctl_get_node_info_for_ref(proc, &info); | |
4834 | if (ret < 0) | |
4835 | goto err; | |
4836 | ||
4837 | if (copy_to_user(ubuf, &info, sizeof(info))) { | |
4838 | ret = -EFAULT; | |
4839 | goto err; | |
4840 | } | |
4841 | ||
4842 | break; | |
4843 | } | |
abcc6153 CC |
4844 | case BINDER_GET_NODE_DEBUG_INFO: { |
4845 | struct binder_node_debug_info info; | |
4846 | ||
4847 | if (copy_from_user(&info, ubuf, sizeof(info))) { | |
4848 | ret = -EFAULT; | |
4849 | goto err; | |
4850 | } | |
4851 | ||
4852 | ret = binder_ioctl_get_node_debug_info(proc, &info); | |
4853 | if (ret < 0) | |
4854 | goto err; | |
4855 | ||
4856 | if (copy_to_user(ubuf, &info, sizeof(info))) { | |
4857 | ret = -EFAULT; | |
4858 | goto err; | |
4859 | } | |
4860 | break; | |
4861 | } | |
432ff1e9 MB |
4862 | case BINDER_FREEZE: { |
4863 | struct binder_freeze_info info; | |
4864 | struct binder_proc **target_procs = NULL, *target_proc; | |
4865 | int target_procs_count = 0, i = 0; | |
4866 | ||
4867 | ret = 0; | |
4868 | ||
4869 | if (copy_from_user(&info, ubuf, sizeof(info))) { | |
4870 | ret = -EFAULT; | |
4871 | goto err; | |
4872 | } | |
4873 | ||
4874 | mutex_lock(&binder_procs_lock); | |
4875 | hlist_for_each_entry(target_proc, &binder_procs, proc_node) { | |
4876 | if (target_proc->pid == info.pid) | |
4877 | target_procs_count++; | |
4878 | } | |
4879 | ||
4880 | if (target_procs_count == 0) { | |
4881 | mutex_unlock(&binder_procs_lock); | |
4882 | ret = -EINVAL; | |
4883 | goto err; | |
4884 | } | |
4885 | ||
4886 | target_procs = kcalloc(target_procs_count, | |
4887 | sizeof(struct binder_proc *), | |
4888 | GFP_KERNEL); | |
4889 | ||
4890 | if (!target_procs) { | |
4891 | mutex_unlock(&binder_procs_lock); | |
4892 | ret = -ENOMEM; | |
4893 | goto err; | |
4894 | } | |
4895 | ||
4896 | hlist_for_each_entry(target_proc, &binder_procs, proc_node) { | |
4897 | if (target_proc->pid != info.pid) | |
4898 | continue; | |
4899 | ||
4900 | binder_inner_proc_lock(target_proc); | |
4901 | target_proc->tmp_ref++; | |
4902 | binder_inner_proc_unlock(target_proc); | |
4903 | ||
4904 | target_procs[i++] = target_proc; | |
4905 | } | |
4906 | mutex_unlock(&binder_procs_lock); | |
4907 | ||
4908 | for (i = 0; i < target_procs_count; i++) { | |
4909 | if (ret >= 0) | |
4910 | ret = binder_ioctl_freeze(&info, | |
4911 | target_procs[i]); | |
4912 | ||
4913 | binder_proc_dec_tmpref(target_procs[i]); | |
4914 | } | |
4915 | ||
4916 | kfree(target_procs); | |
4917 | ||
4918 | if (ret < 0) | |
4919 | goto err; | |
4920 | break; | |
4921 | } | |
ae28c1be MB |
4922 | case BINDER_GET_FROZEN_INFO: { |
4923 | struct binder_frozen_status_info info; | |
4924 | ||
4925 | if (copy_from_user(&info, ubuf, sizeof(info))) { | |
4926 | ret = -EFAULT; | |
4927 | goto err; | |
4928 | } | |
4929 | ||
4930 | ret = binder_ioctl_get_freezer_info(&info); | |
4931 | if (ret < 0) | |
4932 | goto err; | |
4933 | ||
4934 | if (copy_to_user(ubuf, &info, sizeof(info))) { | |
4935 | ret = -EFAULT; | |
4936 | goto err; | |
4937 | } | |
4938 | break; | |
4939 | } | |
a7dc1e6f HL |
4940 | case BINDER_ENABLE_ONEWAY_SPAM_DETECTION: { |
4941 | uint32_t enable; | |
4942 | ||
4943 | if (copy_from_user(&enable, ubuf, sizeof(enable))) { | |
ced081a4 | 4944 | ret = -EFAULT; |
a7dc1e6f HL |
4945 | goto err; |
4946 | } | |
4947 | binder_inner_proc_lock(proc); | |
4948 | proc->oneway_spam_detection_enabled = (bool)enable; | |
4949 | binder_inner_proc_unlock(proc); | |
4950 | break; | |
4951 | } | |
355b0502 GKH |
4952 | default: |
4953 | ret = -EINVAL; | |
4954 | goto err; | |
4955 | } | |
4956 | ret = 0; | |
4957 | err: | |
4958 | if (thread) | |
08dabcee | 4959 | thread->looper_need_return = false; |
355b0502 | 4960 | wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
95c16f9d | 4961 | if (ret && ret != -EINTR) |
56b468fc | 4962 | pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret); |
975a1ac9 AH |
4963 | err_unlocked: |
4964 | trace_binder_ioctl_done(ret); | |
355b0502 GKH |
4965 | return ret; |
4966 | } | |
4967 | ||
4968 | static void binder_vma_open(struct vm_area_struct *vma) | |
4969 | { | |
4970 | struct binder_proc *proc = vma->vm_private_data; | |
10f62861 | 4971 | |
355b0502 | 4972 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
56b468fc | 4973 | "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", |
355b0502 GKH |
4974 | proc->pid, vma->vm_start, vma->vm_end, |
4975 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, | |
4976 | (unsigned long)pgprot_val(vma->vm_page_prot)); | |
355b0502 GKH |
4977 | } |
4978 | ||
4979 | static void binder_vma_close(struct vm_area_struct *vma) | |
4980 | { | |
4981 | struct binder_proc *proc = vma->vm_private_data; | |
10f62861 | 4982 | |
355b0502 | 4983 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
56b468fc | 4984 | "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", |
355b0502 GKH |
4985 | proc->pid, vma->vm_start, vma->vm_end, |
4986 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, | |
4987 | (unsigned long)pgprot_val(vma->vm_page_prot)); | |
19c98724 | 4988 | binder_alloc_vma_close(&proc->alloc); |
355b0502 GKH |
4989 | } |
4990 | ||
e19f70aa | 4991 | static vm_fault_t binder_vm_fault(struct vm_fault *vmf) |
ddac7d5f VM |
4992 | { |
4993 | return VM_FAULT_SIGBUS; | |
4994 | } | |
4995 | ||
7cbea8dc | 4996 | static const struct vm_operations_struct binder_vm_ops = { |
355b0502 GKH |
4997 | .open = binder_vma_open, |
4998 | .close = binder_vma_close, | |
ddac7d5f | 4999 | .fault = binder_vm_fault, |
355b0502 GKH |
5000 | }; |
5001 | ||
19c98724 TK |
5002 | static int binder_mmap(struct file *filp, struct vm_area_struct *vma) |
5003 | { | |
19c98724 | 5004 | struct binder_proc *proc = filp->private_data; |
19c98724 TK |
5005 | |
5006 | if (proc->tsk != current->group_leader) | |
5007 | return -EINVAL; | |
5008 | ||
19c98724 TK |
5009 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
5010 | "%s: %d %lx-%lx (%ld K) vma %lx pagep %lx\n", | |
5011 | __func__, proc->pid, vma->vm_start, vma->vm_end, | |
5012 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, | |
5013 | (unsigned long)pgprot_val(vma->vm_page_prot)); | |
5014 | ||
5015 | if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) { | |
2a3809da LS |
5016 | pr_err("%s: %d %lx-%lx %s failed %d\n", __func__, |
5017 | proc->pid, vma->vm_start, vma->vm_end, "bad vm_flags", -EPERM); | |
5018 | return -EPERM; | |
19c98724 | 5019 | } |
720c2419 MK |
5020 | vma->vm_flags |= VM_DONTCOPY | VM_MIXEDMAP; |
5021 | vma->vm_flags &= ~VM_MAYWRITE; | |
5022 | ||
19c98724 TK |
5023 | vma->vm_ops = &binder_vm_ops; |
5024 | vma->vm_private_data = proc; | |
5025 | ||
2a3809da | 5026 | return binder_alloc_mmap_handler(&proc->alloc, vma); |
355b0502 GKH |
5027 | } |
5028 | ||
5029 | static int binder_open(struct inode *nodp, struct file *filp) | |
5030 | { | |
eb143f87 | 5031 | struct binder_proc *proc, *itr; |
ac4812c5 | 5032 | struct binder_device *binder_dev; |
4feb80fa HV |
5033 | struct binderfs_info *info; |
5034 | struct dentry *binder_binderfs_dir_entry_proc = NULL; | |
eb143f87 | 5035 | bool existing_pid = false; |
355b0502 | 5036 | |
00c41cdd | 5037 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, "%s: %d:%d\n", __func__, |
355b0502 GKH |
5038 | current->group_leader->pid, current->pid); |
5039 | ||
5040 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
5041 | if (proc == NULL) | |
5042 | return -ENOMEM; | |
9630fe88 TK |
5043 | spin_lock_init(&proc->inner_lock); |
5044 | spin_lock_init(&proc->outer_lock); | |
c4ea41ba TK |
5045 | get_task_struct(current->group_leader); |
5046 | proc->tsk = current->group_leader; | |
355b0502 | 5047 | INIT_LIST_HEAD(&proc->todo); |
432ff1e9 | 5048 | init_waitqueue_head(&proc->freeze_wait); |
355b0502 | 5049 | proc->default_priority = task_nice(current); |
3ad20fe3 | 5050 | /* binderfs stashes devices in i_private */ |
4feb80fa | 5051 | if (is_binderfs_device(nodp)) { |
f0fe2c0f | 5052 | binder_dev = nodp->i_private; |
4feb80fa HV |
5053 | info = nodp->i_sb->s_fs_info; |
5054 | binder_binderfs_dir_entry_proc = info->proc_log_dir; | |
5055 | } else { | |
3ad20fe3 CB |
5056 | binder_dev = container_of(filp->private_data, |
5057 | struct binder_device, miscdev); | |
4feb80fa | 5058 | } |
f0fe2c0f | 5059 | refcount_inc(&binder_dev->ref); |
ac4812c5 | 5060 | proc->context = &binder_dev->context; |
19c98724 | 5061 | binder_alloc_init(&proc->alloc); |
975a1ac9 | 5062 | |
355b0502 | 5063 | binder_stats_created(BINDER_STAT_PROC); |
355b0502 GKH |
5064 | proc->pid = current->group_leader->pid; |
5065 | INIT_LIST_HEAD(&proc->delivered_death); | |
1b77e9dc | 5066 | INIT_LIST_HEAD(&proc->waiting_threads); |
355b0502 | 5067 | filp->private_data = proc; |
975a1ac9 | 5068 | |
c44b1231 | 5069 | mutex_lock(&binder_procs_lock); |
eb143f87 MF |
5070 | hlist_for_each_entry(itr, &binder_procs, proc_node) { |
5071 | if (itr->pid == proc->pid) { | |
5072 | existing_pid = true; | |
5073 | break; | |
5074 | } | |
5075 | } | |
c44b1231 TK |
5076 | hlist_add_head(&proc->proc_node, &binder_procs); |
5077 | mutex_unlock(&binder_procs_lock); | |
5078 | ||
eb143f87 | 5079 | if (binder_debugfs_dir_entry_proc && !existing_pid) { |
355b0502 | 5080 | char strbuf[11]; |
10f62861 | 5081 | |
355b0502 | 5082 | snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); |
14db3181 | 5083 | /* |
eb143f87 MF |
5084 | * proc debug entries are shared between contexts. |
5085 | * Only create for the first PID to avoid debugfs log spamming | |
5086 | * The printing code will anyway print all contexts for a given | |
5087 | * PID so this is not a problem. | |
14db3181 | 5088 | */ |
21d02ddf | 5089 | proc->debugfs_entry = debugfs_create_file(strbuf, 0444, |
14db3181 MC |
5090 | binder_debugfs_dir_entry_proc, |
5091 | (void *)(unsigned long)proc->pid, | |
c13e0a52 | 5092 | &proc_fops); |
355b0502 GKH |
5093 | } |
5094 | ||
eb143f87 | 5095 | if (binder_binderfs_dir_entry_proc && !existing_pid) { |
4feb80fa HV |
5096 | char strbuf[11]; |
5097 | struct dentry *binderfs_entry; | |
5098 | ||
5099 | snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); | |
5100 | /* | |
5101 | * Similar to debugfs, the process specific log file is shared | |
eb143f87 MF |
5102 | * between contexts. Only create for the first PID. |
5103 | * This is ok since same as debugfs, the log file will contain | |
5104 | * information on all contexts of a given PID. | |
4feb80fa HV |
5105 | */ |
5106 | binderfs_entry = binderfs_create_file(binder_binderfs_dir_entry_proc, | |
5107 | strbuf, &proc_fops, (void *)(unsigned long)proc->pid); | |
5108 | if (!IS_ERR(binderfs_entry)) { | |
5109 | proc->binderfs_entry = binderfs_entry; | |
5110 | } else { | |
5111 | int error; | |
5112 | ||
5113 | error = PTR_ERR(binderfs_entry); | |
eb143f87 MF |
5114 | pr_warn("Unable to create file %s in binderfs (error %d)\n", |
5115 | strbuf, error); | |
4feb80fa HV |
5116 | } |
5117 | } | |
5118 | ||
355b0502 GKH |
5119 | return 0; |
5120 | } | |
5121 | ||
5122 | static int binder_flush(struct file *filp, fl_owner_t id) | |
5123 | { | |
5124 | struct binder_proc *proc = filp->private_data; | |
5125 | ||
5126 | binder_defer_work(proc, BINDER_DEFERRED_FLUSH); | |
5127 | ||
5128 | return 0; | |
5129 | } | |
5130 | ||
5131 | static void binder_deferred_flush(struct binder_proc *proc) | |
5132 | { | |
5133 | struct rb_node *n; | |
5134 | int wake_count = 0; | |
10f62861 | 5135 | |
7bd7b0e6 | 5136 | binder_inner_proc_lock(proc); |
355b0502 GKH |
5137 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) { |
5138 | struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); | |
10f62861 | 5139 | |
08dabcee | 5140 | thread->looper_need_return = true; |
355b0502 GKH |
5141 | if (thread->looper & BINDER_LOOPER_STATE_WAITING) { |
5142 | wake_up_interruptible(&thread->wait); | |
5143 | wake_count++; | |
5144 | } | |
5145 | } | |
7bd7b0e6 | 5146 | binder_inner_proc_unlock(proc); |
355b0502 GKH |
5147 | |
5148 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, | |
5149 | "binder_flush: %d woke %d threads\n", proc->pid, | |
5150 | wake_count); | |
5151 | } | |
5152 | ||
5153 | static int binder_release(struct inode *nodp, struct file *filp) | |
5154 | { | |
5155 | struct binder_proc *proc = filp->private_data; | |
10f62861 | 5156 | |
16b66554 | 5157 | debugfs_remove(proc->debugfs_entry); |
4feb80fa HV |
5158 | |
5159 | if (proc->binderfs_entry) { | |
5160 | binderfs_remove_file(proc->binderfs_entry); | |
5161 | proc->binderfs_entry = NULL; | |
5162 | } | |
5163 | ||
355b0502 GKH |
5164 | binder_defer_work(proc, BINDER_DEFERRED_RELEASE); |
5165 | ||
5166 | return 0; | |
5167 | } | |
5168 | ||
008fa749 ME |
5169 | static int binder_node_release(struct binder_node *node, int refs) |
5170 | { | |
5171 | struct binder_ref *ref; | |
5172 | int death = 0; | |
ed29721e | 5173 | struct binder_proc *proc = node->proc; |
008fa749 | 5174 | |
72196393 | 5175 | binder_release_work(proc, &node->async_todo); |
ed29721e | 5176 | |
673068ee | 5177 | binder_node_lock(node); |
ed29721e | 5178 | binder_inner_proc_lock(proc); |
72196393 | 5179 | binder_dequeue_work_ilocked(&node->work); |
adc18842 TK |
5180 | /* |
5181 | * The caller must have taken a temporary ref on the node, | |
5182 | */ | |
5183 | BUG_ON(!node->tmp_refs); | |
5184 | if (hlist_empty(&node->refs) && node->tmp_refs == 1) { | |
ed29721e | 5185 | binder_inner_proc_unlock(proc); |
673068ee | 5186 | binder_node_unlock(node); |
ed29721e | 5187 | binder_free_node(node); |
008fa749 ME |
5188 | |
5189 | return refs; | |
5190 | } | |
5191 | ||
5192 | node->proc = NULL; | |
5193 | node->local_strong_refs = 0; | |
5194 | node->local_weak_refs = 0; | |
ed29721e | 5195 | binder_inner_proc_unlock(proc); |
c44b1231 TK |
5196 | |
5197 | spin_lock(&binder_dead_nodes_lock); | |
008fa749 | 5198 | hlist_add_head(&node->dead_node, &binder_dead_nodes); |
c44b1231 | 5199 | spin_unlock(&binder_dead_nodes_lock); |
008fa749 ME |
5200 | |
5201 | hlist_for_each_entry(ref, &node->refs, node_entry) { | |
5202 | refs++; | |
ab51ec6b MC |
5203 | /* |
5204 | * Need the node lock to synchronize | |
5205 | * with new notification requests and the | |
5206 | * inner lock to synchronize with queued | |
5207 | * death notifications. | |
5208 | */ | |
5209 | binder_inner_proc_lock(ref->proc); | |
5210 | if (!ref->death) { | |
5211 | binder_inner_proc_unlock(ref->proc); | |
e194fd8a | 5212 | continue; |
ab51ec6b | 5213 | } |
008fa749 ME |
5214 | |
5215 | death++; | |
5216 | ||
ab51ec6b MC |
5217 | BUG_ON(!list_empty(&ref->death->work.entry)); |
5218 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; | |
5219 | binder_enqueue_work_ilocked(&ref->death->work, | |
5220 | &ref->proc->todo); | |
408c68b1 | 5221 | binder_wakeup_proc_ilocked(ref->proc); |
72196393 | 5222 | binder_inner_proc_unlock(ref->proc); |
008fa749 ME |
5223 | } |
5224 | ||
008fa749 ME |
5225 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
5226 | "node %d now dead, refs %d, death %d\n", | |
5227 | node->debug_id, refs, death); | |
673068ee | 5228 | binder_node_unlock(node); |
adc18842 | 5229 | binder_put_node(node); |
008fa749 ME |
5230 | |
5231 | return refs; | |
5232 | } | |
5233 | ||
355b0502 GKH |
5234 | static void binder_deferred_release(struct binder_proc *proc) |
5235 | { | |
342e5c90 | 5236 | struct binder_context *context = proc->context; |
355b0502 | 5237 | struct rb_node *n; |
19c98724 | 5238 | int threads, nodes, incoming_refs, outgoing_refs, active_transactions; |
355b0502 | 5239 | |
c44b1231 | 5240 | mutex_lock(&binder_procs_lock); |
355b0502 | 5241 | hlist_del(&proc->proc_node); |
c44b1231 | 5242 | mutex_unlock(&binder_procs_lock); |
53413e7d | 5243 | |
c44b1231 | 5244 | mutex_lock(&context->context_mgr_node_lock); |
342e5c90 MC |
5245 | if (context->binder_context_mgr_node && |
5246 | context->binder_context_mgr_node->proc == proc) { | |
355b0502 | 5247 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
c07c933f ME |
5248 | "%s: %d context_mgr_node gone\n", |
5249 | __func__, proc->pid); | |
342e5c90 | 5250 | context->binder_context_mgr_node = NULL; |
355b0502 | 5251 | } |
c44b1231 | 5252 | mutex_unlock(&context->context_mgr_node_lock); |
7bd7b0e6 | 5253 | binder_inner_proc_lock(proc); |
7a4408c6 TK |
5254 | /* |
5255 | * Make sure proc stays alive after we | |
5256 | * remove all the threads | |
5257 | */ | |
5258 | proc->tmp_ref++; | |
355b0502 | 5259 | |
7a4408c6 | 5260 | proc->is_dead = true; |
432ff1e9 | 5261 | proc->is_frozen = false; |
ae28c1be MB |
5262 | proc->sync_recv = false; |
5263 | proc->async_recv = false; | |
355b0502 GKH |
5264 | threads = 0; |
5265 | active_transactions = 0; | |
5266 | while ((n = rb_first(&proc->threads))) { | |
53413e7d ME |
5267 | struct binder_thread *thread; |
5268 | ||
5269 | thread = rb_entry(n, struct binder_thread, rb_node); | |
7bd7b0e6 | 5270 | binder_inner_proc_unlock(proc); |
355b0502 | 5271 | threads++; |
7a4408c6 | 5272 | active_transactions += binder_thread_release(proc, thread); |
7bd7b0e6 | 5273 | binder_inner_proc_lock(proc); |
355b0502 | 5274 | } |
53413e7d | 5275 | |
355b0502 GKH |
5276 | nodes = 0; |
5277 | incoming_refs = 0; | |
5278 | while ((n = rb_first(&proc->nodes))) { | |
53413e7d | 5279 | struct binder_node *node; |
355b0502 | 5280 | |
53413e7d | 5281 | node = rb_entry(n, struct binder_node, rb_node); |
355b0502 | 5282 | nodes++; |
adc18842 TK |
5283 | /* |
5284 | * take a temporary ref on the node before | |
5285 | * calling binder_node_release() which will either | |
5286 | * kfree() the node or call binder_put_node() | |
5287 | */ | |
da0fa9e4 | 5288 | binder_inc_node_tmpref_ilocked(node); |
355b0502 | 5289 | rb_erase(&node->rb_node, &proc->nodes); |
da0fa9e4 | 5290 | binder_inner_proc_unlock(proc); |
008fa749 | 5291 | incoming_refs = binder_node_release(node, incoming_refs); |
da0fa9e4 | 5292 | binder_inner_proc_lock(proc); |
355b0502 | 5293 | } |
da0fa9e4 | 5294 | binder_inner_proc_unlock(proc); |
53413e7d | 5295 | |
355b0502 | 5296 | outgoing_refs = 0; |
2c1838dc | 5297 | binder_proc_lock(proc); |
355b0502 | 5298 | while ((n = rb_first(&proc->refs_by_desc))) { |
53413e7d ME |
5299 | struct binder_ref *ref; |
5300 | ||
5301 | ref = rb_entry(n, struct binder_ref, rb_node_desc); | |
355b0502 | 5302 | outgoing_refs++; |
2c1838dc TK |
5303 | binder_cleanup_ref_olocked(ref); |
5304 | binder_proc_unlock(proc); | |
372e3147 | 5305 | binder_free_ref(ref); |
2c1838dc | 5306 | binder_proc_lock(proc); |
355b0502 | 5307 | } |
2c1838dc | 5308 | binder_proc_unlock(proc); |
53413e7d | 5309 | |
72196393 TK |
5310 | binder_release_work(proc, &proc->todo); |
5311 | binder_release_work(proc, &proc->delivered_death); | |
355b0502 | 5312 | |
355b0502 | 5313 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
19c98724 | 5314 | "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d\n", |
c07c933f | 5315 | __func__, proc->pid, threads, nodes, incoming_refs, |
19c98724 | 5316 | outgoing_refs, active_transactions); |
355b0502 | 5317 | |
7a4408c6 | 5318 | binder_proc_dec_tmpref(proc); |
355b0502 GKH |
5319 | } |
5320 | ||
5321 | static void binder_deferred_func(struct work_struct *work) | |
5322 | { | |
5323 | struct binder_proc *proc; | |
355b0502 GKH |
5324 | |
5325 | int defer; | |
10f62861 | 5326 | |
355b0502 | 5327 | do { |
355b0502 GKH |
5328 | mutex_lock(&binder_deferred_lock); |
5329 | if (!hlist_empty(&binder_deferred_list)) { | |
5330 | proc = hlist_entry(binder_deferred_list.first, | |
5331 | struct binder_proc, deferred_work_node); | |
5332 | hlist_del_init(&proc->deferred_work_node); | |
5333 | defer = proc->deferred_work; | |
5334 | proc->deferred_work = 0; | |
5335 | } else { | |
5336 | proc = NULL; | |
5337 | defer = 0; | |
5338 | } | |
5339 | mutex_unlock(&binder_deferred_lock); | |
5340 | ||
355b0502 GKH |
5341 | if (defer & BINDER_DEFERRED_FLUSH) |
5342 | binder_deferred_flush(proc); | |
5343 | ||
5344 | if (defer & BINDER_DEFERRED_RELEASE) | |
5345 | binder_deferred_release(proc); /* frees proc */ | |
355b0502 GKH |
5346 | } while (proc); |
5347 | } | |
5348 | static DECLARE_WORK(binder_deferred_work, binder_deferred_func); | |
5349 | ||
5350 | static void | |
5351 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer) | |
5352 | { | |
5353 | mutex_lock(&binder_deferred_lock); | |
5354 | proc->deferred_work |= defer; | |
5355 | if (hlist_unhashed(&proc->deferred_work_node)) { | |
5356 | hlist_add_head(&proc->deferred_work_node, | |
5357 | &binder_deferred_list); | |
1beba52d | 5358 | schedule_work(&binder_deferred_work); |
355b0502 GKH |
5359 | } |
5360 | mutex_unlock(&binder_deferred_lock); | |
5361 | } | |
5362 | ||
5f2f6369 TK |
5363 | static void print_binder_transaction_ilocked(struct seq_file *m, |
5364 | struct binder_proc *proc, | |
5365 | const char *prefix, | |
5366 | struct binder_transaction *t) | |
5249f488 | 5367 | { |
5f2f6369 TK |
5368 | struct binder_proc *to_proc; |
5369 | struct binder_buffer *buffer = t->buffer; | |
5370 | ||
7a4408c6 | 5371 | spin_lock(&t->lock); |
5f2f6369 | 5372 | to_proc = t->to_proc; |
5249f488 | 5373 | seq_printf(m, |
8ca86f16 | 5374 | "%s %d: %pK from %d:%d to %d:%d code %x flags %x pri %ld r%d", |
5249f488 AH |
5375 | prefix, t->debug_id, t, |
5376 | t->from ? t->from->proc->pid : 0, | |
5377 | t->from ? t->from->pid : 0, | |
5f2f6369 | 5378 | to_proc ? to_proc->pid : 0, |
5249f488 AH |
5379 | t->to_thread ? t->to_thread->pid : 0, |
5380 | t->code, t->flags, t->priority, t->need_reply); | |
7a4408c6 TK |
5381 | spin_unlock(&t->lock); |
5382 | ||
5f2f6369 TK |
5383 | if (proc != to_proc) { |
5384 | /* | |
5385 | * Can only safely deref buffer if we are holding the | |
5386 | * correct proc inner lock for this node | |
5387 | */ | |
5388 | seq_puts(m, "\n"); | |
5389 | return; | |
5390 | } | |
5391 | ||
5392 | if (buffer == NULL) { | |
5249f488 AH |
5393 | seq_puts(m, " buffer free\n"); |
5394 | return; | |
355b0502 | 5395 | } |
5f2f6369 TK |
5396 | if (buffer->target_node) |
5397 | seq_printf(m, " node %d", buffer->target_node->debug_id); | |
8ca86f16 | 5398 | seq_printf(m, " size %zd:%zd data %pK\n", |
5f2f6369 | 5399 | buffer->data_size, buffer->offsets_size, |
bde4a19f | 5400 | buffer->user_data); |
355b0502 GKH |
5401 | } |
5402 | ||
5f2f6369 TK |
5403 | static void print_binder_work_ilocked(struct seq_file *m, |
5404 | struct binder_proc *proc, | |
5405 | const char *prefix, | |
5406 | const char *transaction_prefix, | |
5407 | struct binder_work *w) | |
355b0502 GKH |
5408 | { |
5409 | struct binder_node *node; | |
5410 | struct binder_transaction *t; | |
5411 | ||
5412 | switch (w->type) { | |
5413 | case BINDER_WORK_TRANSACTION: | |
5414 | t = container_of(w, struct binder_transaction, work); | |
5f2f6369 TK |
5415 | print_binder_transaction_ilocked( |
5416 | m, proc, transaction_prefix, t); | |
355b0502 | 5417 | break; |
26549d17 TK |
5418 | case BINDER_WORK_RETURN_ERROR: { |
5419 | struct binder_error *e = container_of( | |
5420 | w, struct binder_error, work); | |
5421 | ||
5422 | seq_printf(m, "%stransaction error: %u\n", | |
5423 | prefix, e->cmd); | |
5424 | } break; | |
355b0502 | 5425 | case BINDER_WORK_TRANSACTION_COMPLETE: |
5249f488 | 5426 | seq_printf(m, "%stransaction complete\n", prefix); |
355b0502 GKH |
5427 | break; |
5428 | case BINDER_WORK_NODE: | |
5429 | node = container_of(w, struct binder_node, work); | |
da49889d AH |
5430 | seq_printf(m, "%snode work %d: u%016llx c%016llx\n", |
5431 | prefix, node->debug_id, | |
5432 | (u64)node->ptr, (u64)node->cookie); | |
355b0502 GKH |
5433 | break; |
5434 | case BINDER_WORK_DEAD_BINDER: | |
5249f488 | 5435 | seq_printf(m, "%shas dead binder\n", prefix); |
355b0502 GKH |
5436 | break; |
5437 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: | |
5249f488 | 5438 | seq_printf(m, "%shas cleared dead binder\n", prefix); |
355b0502 GKH |
5439 | break; |
5440 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: | |
5249f488 | 5441 | seq_printf(m, "%shas cleared death notification\n", prefix); |
355b0502 GKH |
5442 | break; |
5443 | default: | |
5249f488 | 5444 | seq_printf(m, "%sunknown work: type %d\n", prefix, w->type); |
355b0502 GKH |
5445 | break; |
5446 | } | |
355b0502 GKH |
5447 | } |
5448 | ||
72196393 TK |
5449 | static void print_binder_thread_ilocked(struct seq_file *m, |
5450 | struct binder_thread *thread, | |
5451 | int print_always) | |
355b0502 GKH |
5452 | { |
5453 | struct binder_transaction *t; | |
5454 | struct binder_work *w; | |
5249f488 AH |
5455 | size_t start_pos = m->count; |
5456 | size_t header_pos; | |
355b0502 | 5457 | |
7a4408c6 | 5458 | seq_printf(m, " thread %d: l %02x need_return %d tr %d\n", |
08dabcee | 5459 | thread->pid, thread->looper, |
7a4408c6 TK |
5460 | thread->looper_need_return, |
5461 | atomic_read(&thread->tmp_ref)); | |
5249f488 | 5462 | header_pos = m->count; |
355b0502 GKH |
5463 | t = thread->transaction_stack; |
5464 | while (t) { | |
355b0502 | 5465 | if (t->from == thread) { |
5f2f6369 TK |
5466 | print_binder_transaction_ilocked(m, thread->proc, |
5467 | " outgoing transaction", t); | |
355b0502 GKH |
5468 | t = t->from_parent; |
5469 | } else if (t->to_thread == thread) { | |
5f2f6369 | 5470 | print_binder_transaction_ilocked(m, thread->proc, |
5249f488 | 5471 | " incoming transaction", t); |
355b0502 GKH |
5472 | t = t->to_parent; |
5473 | } else { | |
5f2f6369 TK |
5474 | print_binder_transaction_ilocked(m, thread->proc, |
5475 | " bad transaction", t); | |
355b0502 GKH |
5476 | t = NULL; |
5477 | } | |
5478 | } | |
5479 | list_for_each_entry(w, &thread->todo, entry) { | |
5f2f6369 | 5480 | print_binder_work_ilocked(m, thread->proc, " ", |
72196393 | 5481 | " pending transaction", w); |
355b0502 | 5482 | } |
5249f488 AH |
5483 | if (!print_always && m->count == header_pos) |
5484 | m->count = start_pos; | |
355b0502 GKH |
5485 | } |
5486 | ||
da0fa9e4 TK |
5487 | static void print_binder_node_nilocked(struct seq_file *m, |
5488 | struct binder_node *node) | |
355b0502 GKH |
5489 | { |
5490 | struct binder_ref *ref; | |
355b0502 GKH |
5491 | struct binder_work *w; |
5492 | int count; | |
5493 | ||
5494 | count = 0; | |
b67bfe0d | 5495 | hlist_for_each_entry(ref, &node->refs, node_entry) |
355b0502 GKH |
5496 | count++; |
5497 | ||
adc18842 | 5498 | seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d tr %d", |
da49889d | 5499 | node->debug_id, (u64)node->ptr, (u64)node->cookie, |
5249f488 AH |
5500 | node->has_strong_ref, node->has_weak_ref, |
5501 | node->local_strong_refs, node->local_weak_refs, | |
adc18842 | 5502 | node->internal_strong_refs, count, node->tmp_refs); |
355b0502 | 5503 | if (count) { |
5249f488 | 5504 | seq_puts(m, " proc"); |
b67bfe0d | 5505 | hlist_for_each_entry(ref, &node->refs, node_entry) |
5249f488 | 5506 | seq_printf(m, " %d", ref->proc->pid); |
355b0502 | 5507 | } |
5249f488 | 5508 | seq_puts(m, "\n"); |
72196393 | 5509 | if (node->proc) { |
72196393 | 5510 | list_for_each_entry(w, &node->async_todo, entry) |
5f2f6369 | 5511 | print_binder_work_ilocked(m, node->proc, " ", |
72196393 | 5512 | " pending async transaction", w); |
72196393 | 5513 | } |
355b0502 GKH |
5514 | } |
5515 | ||
2c1838dc TK |
5516 | static void print_binder_ref_olocked(struct seq_file *m, |
5517 | struct binder_ref *ref) | |
355b0502 | 5518 | { |
673068ee | 5519 | binder_node_lock(ref->node); |
372e3147 TK |
5520 | seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %pK\n", |
5521 | ref->data.debug_id, ref->data.desc, | |
5522 | ref->node->proc ? "" : "dead ", | |
5523 | ref->node->debug_id, ref->data.strong, | |
5524 | ref->data.weak, ref->death); | |
673068ee | 5525 | binder_node_unlock(ref->node); |
355b0502 GKH |
5526 | } |
5527 | ||
5249f488 AH |
5528 | static void print_binder_proc(struct seq_file *m, |
5529 | struct binder_proc *proc, int print_all) | |
355b0502 GKH |
5530 | { |
5531 | struct binder_work *w; | |
5532 | struct rb_node *n; | |
5249f488 AH |
5533 | size_t start_pos = m->count; |
5534 | size_t header_pos; | |
da0fa9e4 | 5535 | struct binder_node *last_node = NULL; |
5249f488 AH |
5536 | |
5537 | seq_printf(m, "proc %d\n", proc->pid); | |
14db3181 | 5538 | seq_printf(m, "context %s\n", proc->context->name); |
5249f488 AH |
5539 | header_pos = m->count; |
5540 | ||
72196393 | 5541 | binder_inner_proc_lock(proc); |
5249f488 | 5542 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) |
72196393 | 5543 | print_binder_thread_ilocked(m, rb_entry(n, struct binder_thread, |
5249f488 | 5544 | rb_node), print_all); |
da0fa9e4 | 5545 | |
5249f488 | 5546 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) { |
355b0502 GKH |
5547 | struct binder_node *node = rb_entry(n, struct binder_node, |
5548 | rb_node); | |
ecd589d8 TK |
5549 | if (!print_all && !node->has_async_transaction) |
5550 | continue; | |
5551 | ||
da0fa9e4 TK |
5552 | /* |
5553 | * take a temporary reference on the node so it | |
5554 | * survives and isn't removed from the tree | |
5555 | * while we print it. | |
5556 | */ | |
5557 | binder_inc_node_tmpref_ilocked(node); | |
5558 | /* Need to drop inner lock to take node lock */ | |
5559 | binder_inner_proc_unlock(proc); | |
5560 | if (last_node) | |
5561 | binder_put_node(last_node); | |
5562 | binder_node_inner_lock(node); | |
5563 | print_binder_node_nilocked(m, node); | |
5564 | binder_node_inner_unlock(node); | |
5565 | last_node = node; | |
5566 | binder_inner_proc_lock(proc); | |
355b0502 | 5567 | } |
da0fa9e4 TK |
5568 | binder_inner_proc_unlock(proc); |
5569 | if (last_node) | |
5570 | binder_put_node(last_node); | |
5571 | ||
355b0502 | 5572 | if (print_all) { |
2c1838dc | 5573 | binder_proc_lock(proc); |
355b0502 | 5574 | for (n = rb_first(&proc->refs_by_desc); |
5249f488 | 5575 | n != NULL; |
355b0502 | 5576 | n = rb_next(n)) |
2c1838dc TK |
5577 | print_binder_ref_olocked(m, rb_entry(n, |
5578 | struct binder_ref, | |
5579 | rb_node_desc)); | |
5580 | binder_proc_unlock(proc); | |
355b0502 | 5581 | } |
19c98724 | 5582 | binder_alloc_print_allocated(m, &proc->alloc); |
72196393 | 5583 | binder_inner_proc_lock(proc); |
5249f488 | 5584 | list_for_each_entry(w, &proc->todo, entry) |
5f2f6369 TK |
5585 | print_binder_work_ilocked(m, proc, " ", |
5586 | " pending transaction", w); | |
355b0502 | 5587 | list_for_each_entry(w, &proc->delivered_death, entry) { |
5249f488 | 5588 | seq_puts(m, " has delivered dead binder\n"); |
355b0502 GKH |
5589 | break; |
5590 | } | |
72196393 | 5591 | binder_inner_proc_unlock(proc); |
5249f488 AH |
5592 | if (!print_all && m->count == header_pos) |
5593 | m->count = start_pos; | |
355b0502 GKH |
5594 | } |
5595 | ||
167bccbd | 5596 | static const char * const binder_return_strings[] = { |
355b0502 GKH |
5597 | "BR_ERROR", |
5598 | "BR_OK", | |
5599 | "BR_TRANSACTION", | |
5600 | "BR_REPLY", | |
5601 | "BR_ACQUIRE_RESULT", | |
5602 | "BR_DEAD_REPLY", | |
5603 | "BR_TRANSACTION_COMPLETE", | |
5604 | "BR_INCREFS", | |
5605 | "BR_ACQUIRE", | |
5606 | "BR_RELEASE", | |
5607 | "BR_DECREFS", | |
5608 | "BR_ATTEMPT_ACQUIRE", | |
5609 | "BR_NOOP", | |
5610 | "BR_SPAWN_LOOPER", | |
5611 | "BR_FINISHED", | |
5612 | "BR_DEAD_BINDER", | |
5613 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", | |
00516915 HL |
5614 | "BR_FAILED_REPLY", |
5615 | "BR_FROZEN_REPLY", | |
a7dc1e6f | 5616 | "BR_ONEWAY_SPAM_SUSPECT", |
355b0502 GKH |
5617 | }; |
5618 | ||
167bccbd | 5619 | static const char * const binder_command_strings[] = { |
355b0502 GKH |
5620 | "BC_TRANSACTION", |
5621 | "BC_REPLY", | |
5622 | "BC_ACQUIRE_RESULT", | |
5623 | "BC_FREE_BUFFER", | |
5624 | "BC_INCREFS", | |
5625 | "BC_ACQUIRE", | |
5626 | "BC_RELEASE", | |
5627 | "BC_DECREFS", | |
5628 | "BC_INCREFS_DONE", | |
5629 | "BC_ACQUIRE_DONE", | |
5630 | "BC_ATTEMPT_ACQUIRE", | |
5631 | "BC_REGISTER_LOOPER", | |
5632 | "BC_ENTER_LOOPER", | |
5633 | "BC_EXIT_LOOPER", | |
5634 | "BC_REQUEST_DEATH_NOTIFICATION", | |
5635 | "BC_CLEAR_DEATH_NOTIFICATION", | |
7980240b MC |
5636 | "BC_DEAD_BINDER_DONE", |
5637 | "BC_TRANSACTION_SG", | |
5638 | "BC_REPLY_SG", | |
355b0502 GKH |
5639 | }; |
5640 | ||
167bccbd | 5641 | static const char * const binder_objstat_strings[] = { |
355b0502 GKH |
5642 | "proc", |
5643 | "thread", | |
5644 | "node", | |
5645 | "ref", | |
5646 | "death", | |
5647 | "transaction", | |
5648 | "transaction_complete" | |
5649 | }; | |
5650 | ||
5249f488 AH |
5651 | static void print_binder_stats(struct seq_file *m, const char *prefix, |
5652 | struct binder_stats *stats) | |
355b0502 GKH |
5653 | { |
5654 | int i; | |
5655 | ||
5656 | BUILD_BUG_ON(ARRAY_SIZE(stats->bc) != | |
5249f488 | 5657 | ARRAY_SIZE(binder_command_strings)); |
355b0502 | 5658 | for (i = 0; i < ARRAY_SIZE(stats->bc); i++) { |
0953c797 BJS |
5659 | int temp = atomic_read(&stats->bc[i]); |
5660 | ||
5661 | if (temp) | |
5249f488 | 5662 | seq_printf(m, "%s%s: %d\n", prefix, |
0953c797 | 5663 | binder_command_strings[i], temp); |
355b0502 GKH |
5664 | } |
5665 | ||
5666 | BUILD_BUG_ON(ARRAY_SIZE(stats->br) != | |
5249f488 | 5667 | ARRAY_SIZE(binder_return_strings)); |
355b0502 | 5668 | for (i = 0; i < ARRAY_SIZE(stats->br); i++) { |
0953c797 BJS |
5669 | int temp = atomic_read(&stats->br[i]); |
5670 | ||
5671 | if (temp) | |
5249f488 | 5672 | seq_printf(m, "%s%s: %d\n", prefix, |
0953c797 | 5673 | binder_return_strings[i], temp); |
355b0502 GKH |
5674 | } |
5675 | ||
5676 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != | |
5249f488 | 5677 | ARRAY_SIZE(binder_objstat_strings)); |
355b0502 | 5678 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != |
5249f488 | 5679 | ARRAY_SIZE(stats->obj_deleted)); |
355b0502 | 5680 | for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) { |
0953c797 BJS |
5681 | int created = atomic_read(&stats->obj_created[i]); |
5682 | int deleted = atomic_read(&stats->obj_deleted[i]); | |
5683 | ||
5684 | if (created || deleted) | |
5685 | seq_printf(m, "%s%s: active %d total %d\n", | |
5686 | prefix, | |
5249f488 | 5687 | binder_objstat_strings[i], |
0953c797 BJS |
5688 | created - deleted, |
5689 | created); | |
355b0502 | 5690 | } |
355b0502 GKH |
5691 | } |
5692 | ||
5249f488 AH |
5693 | static void print_binder_proc_stats(struct seq_file *m, |
5694 | struct binder_proc *proc) | |
355b0502 GKH |
5695 | { |
5696 | struct binder_work *w; | |
1b77e9dc | 5697 | struct binder_thread *thread; |
355b0502 | 5698 | struct rb_node *n; |
1b77e9dc | 5699 | int count, strong, weak, ready_threads; |
7bd7b0e6 TK |
5700 | size_t free_async_space = |
5701 | binder_alloc_get_free_async_space(&proc->alloc); | |
355b0502 | 5702 | |
5249f488 | 5703 | seq_printf(m, "proc %d\n", proc->pid); |
14db3181 | 5704 | seq_printf(m, "context %s\n", proc->context->name); |
355b0502 | 5705 | count = 0; |
1b77e9dc | 5706 | ready_threads = 0; |
7bd7b0e6 | 5707 | binder_inner_proc_lock(proc); |
355b0502 GKH |
5708 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) |
5709 | count++; | |
1b77e9dc MC |
5710 | |
5711 | list_for_each_entry(thread, &proc->waiting_threads, waiting_thread_node) | |
5712 | ready_threads++; | |
5713 | ||
5249f488 AH |
5714 | seq_printf(m, " threads: %d\n", count); |
5715 | seq_printf(m, " requested threads: %d+%d/%d\n" | |
355b0502 GKH |
5716 | " ready threads %d\n" |
5717 | " free async space %zd\n", proc->requested_threads, | |
5718 | proc->requested_threads_started, proc->max_threads, | |
1b77e9dc | 5719 | ready_threads, |
7bd7b0e6 | 5720 | free_async_space); |
355b0502 GKH |
5721 | count = 0; |
5722 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) | |
5723 | count++; | |
da0fa9e4 | 5724 | binder_inner_proc_unlock(proc); |
5249f488 | 5725 | seq_printf(m, " nodes: %d\n", count); |
355b0502 GKH |
5726 | count = 0; |
5727 | strong = 0; | |
5728 | weak = 0; | |
2c1838dc | 5729 | binder_proc_lock(proc); |
355b0502 GKH |
5730 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
5731 | struct binder_ref *ref = rb_entry(n, struct binder_ref, | |
5732 | rb_node_desc); | |
5733 | count++; | |
372e3147 TK |
5734 | strong += ref->data.strong; |
5735 | weak += ref->data.weak; | |
355b0502 | 5736 | } |
2c1838dc | 5737 | binder_proc_unlock(proc); |
5249f488 | 5738 | seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak); |
355b0502 | 5739 | |
19c98724 | 5740 | count = binder_alloc_get_allocated_count(&proc->alloc); |
5249f488 | 5741 | seq_printf(m, " buffers: %d\n", count); |
355b0502 | 5742 | |
8ef4665a SY |
5743 | binder_alloc_print_pages(m, &proc->alloc); |
5744 | ||
355b0502 | 5745 | count = 0; |
72196393 | 5746 | binder_inner_proc_lock(proc); |
355b0502 | 5747 | list_for_each_entry(w, &proc->todo, entry) { |
72196393 | 5748 | if (w->type == BINDER_WORK_TRANSACTION) |
355b0502 | 5749 | count++; |
355b0502 | 5750 | } |
72196393 | 5751 | binder_inner_proc_unlock(proc); |
5249f488 | 5752 | seq_printf(m, " pending transactions: %d\n", count); |
355b0502 | 5753 | |
5249f488 | 5754 | print_binder_stats(m, " ", &proc->stats); |
355b0502 GKH |
5755 | } |
5756 | ||
5757 | ||
0e13e452 | 5758 | int binder_state_show(struct seq_file *m, void *unused) |
355b0502 GKH |
5759 | { |
5760 | struct binder_proc *proc; | |
355b0502 | 5761 | struct binder_node *node; |
673068ee | 5762 | struct binder_node *last_node = NULL; |
355b0502 | 5763 | |
5249f488 | 5764 | seq_puts(m, "binder state:\n"); |
355b0502 | 5765 | |
c44b1231 | 5766 | spin_lock(&binder_dead_nodes_lock); |
355b0502 | 5767 | if (!hlist_empty(&binder_dead_nodes)) |
5249f488 | 5768 | seq_puts(m, "dead nodes:\n"); |
673068ee TK |
5769 | hlist_for_each_entry(node, &binder_dead_nodes, dead_node) { |
5770 | /* | |
5771 | * take a temporary reference on the node so it | |
5772 | * survives and isn't removed from the list | |
5773 | * while we print it. | |
5774 | */ | |
5775 | node->tmp_refs++; | |
5776 | spin_unlock(&binder_dead_nodes_lock); | |
5777 | if (last_node) | |
5778 | binder_put_node(last_node); | |
5779 | binder_node_lock(node); | |
da0fa9e4 | 5780 | print_binder_node_nilocked(m, node); |
673068ee TK |
5781 | binder_node_unlock(node); |
5782 | last_node = node; | |
5783 | spin_lock(&binder_dead_nodes_lock); | |
5784 | } | |
c44b1231 | 5785 | spin_unlock(&binder_dead_nodes_lock); |
673068ee TK |
5786 | if (last_node) |
5787 | binder_put_node(last_node); | |
355b0502 | 5788 | |
c44b1231 | 5789 | mutex_lock(&binder_procs_lock); |
b67bfe0d | 5790 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
5249f488 | 5791 | print_binder_proc(m, proc, 1); |
c44b1231 | 5792 | mutex_unlock(&binder_procs_lock); |
a60b890f | 5793 | |
5249f488 | 5794 | return 0; |
355b0502 GKH |
5795 | } |
5796 | ||
0e13e452 | 5797 | int binder_stats_show(struct seq_file *m, void *unused) |
355b0502 GKH |
5798 | { |
5799 | struct binder_proc *proc; | |
355b0502 | 5800 | |
5249f488 | 5801 | seq_puts(m, "binder stats:\n"); |
355b0502 | 5802 | |
5249f488 | 5803 | print_binder_stats(m, "", &binder_stats); |
355b0502 | 5804 | |
c44b1231 | 5805 | mutex_lock(&binder_procs_lock); |
b67bfe0d | 5806 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
5249f488 | 5807 | print_binder_proc_stats(m, proc); |
c44b1231 | 5808 | mutex_unlock(&binder_procs_lock); |
a60b890f | 5809 | |
5249f488 | 5810 | return 0; |
355b0502 GKH |
5811 | } |
5812 | ||
0e13e452 | 5813 | int binder_transactions_show(struct seq_file *m, void *unused) |
355b0502 GKH |
5814 | { |
5815 | struct binder_proc *proc; | |
355b0502 | 5816 | |
5249f488 | 5817 | seq_puts(m, "binder transactions:\n"); |
c44b1231 | 5818 | mutex_lock(&binder_procs_lock); |
b67bfe0d | 5819 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
5249f488 | 5820 | print_binder_proc(m, proc, 0); |
c44b1231 | 5821 | mutex_unlock(&binder_procs_lock); |
a60b890f | 5822 | |
5249f488 | 5823 | return 0; |
355b0502 GKH |
5824 | } |
5825 | ||
c13e0a52 | 5826 | static int proc_show(struct seq_file *m, void *unused) |
355b0502 | 5827 | { |
83050a4e | 5828 | struct binder_proc *itr; |
14db3181 | 5829 | int pid = (unsigned long)m->private; |
355b0502 | 5830 | |
c44b1231 | 5831 | mutex_lock(&binder_procs_lock); |
83050a4e | 5832 | hlist_for_each_entry(itr, &binder_procs, proc_node) { |
14db3181 MC |
5833 | if (itr->pid == pid) { |
5834 | seq_puts(m, "binder proc state:\n"); | |
5835 | print_binder_proc(m, itr, 1); | |
83050a4e RA |
5836 | } |
5837 | } | |
c44b1231 TK |
5838 | mutex_unlock(&binder_procs_lock); |
5839 | ||
5249f488 | 5840 | return 0; |
355b0502 GKH |
5841 | } |
5842 | ||
5249f488 | 5843 | static void print_binder_transaction_log_entry(struct seq_file *m, |
355b0502 GKH |
5844 | struct binder_transaction_log_entry *e) |
5845 | { | |
d99c7333 TK |
5846 | int debug_id = READ_ONCE(e->debug_id_done); |
5847 | /* | |
5848 | * read barrier to guarantee debug_id_done read before | |
5849 | * we print the log values | |
5850 | */ | |
5851 | smp_rmb(); | |
5249f488 | 5852 | seq_printf(m, |
d99c7333 | 5853 | "%d: %s from %d:%d to %d:%d context %s node %d handle %d size %d:%d ret %d/%d l=%d", |
5249f488 AH |
5854 | e->debug_id, (e->call_type == 2) ? "reply" : |
5855 | ((e->call_type == 1) ? "async" : "call "), e->from_proc, | |
14db3181 | 5856 | e->from_thread, e->to_proc, e->to_thread, e->context_name, |
57ada2fb TK |
5857 | e->to_node, e->target_handle, e->data_size, e->offsets_size, |
5858 | e->return_error, e->return_error_param, | |
5859 | e->return_error_line); | |
d99c7333 TK |
5860 | /* |
5861 | * read-barrier to guarantee read of debug_id_done after | |
5862 | * done printing the fields of the entry | |
5863 | */ | |
5864 | smp_rmb(); | |
5865 | seq_printf(m, debug_id && debug_id == READ_ONCE(e->debug_id_done) ? | |
5866 | "\n" : " (incomplete)\n"); | |
355b0502 GKH |
5867 | } |
5868 | ||
03e2e07e | 5869 | int binder_transaction_log_show(struct seq_file *m, void *unused) |
355b0502 | 5870 | { |
5249f488 | 5871 | struct binder_transaction_log *log = m->private; |
d99c7333 TK |
5872 | unsigned int log_cur = atomic_read(&log->cur); |
5873 | unsigned int count; | |
5874 | unsigned int cur; | |
355b0502 | 5875 | int i; |
355b0502 | 5876 | |
d99c7333 TK |
5877 | count = log_cur + 1; |
5878 | cur = count < ARRAY_SIZE(log->entry) && !log->full ? | |
5879 | 0 : count % ARRAY_SIZE(log->entry); | |
5880 | if (count > ARRAY_SIZE(log->entry) || log->full) | |
5881 | count = ARRAY_SIZE(log->entry); | |
5882 | for (i = 0; i < count; i++) { | |
5883 | unsigned int index = cur++ % ARRAY_SIZE(log->entry); | |
5884 | ||
5885 | print_binder_transaction_log_entry(m, &log->entry[index]); | |
355b0502 | 5886 | } |
5249f488 | 5887 | return 0; |
355b0502 GKH |
5888 | } |
5889 | ||
3ad20fe3 | 5890 | const struct file_operations binder_fops = { |
355b0502 GKH |
5891 | .owner = THIS_MODULE, |
5892 | .poll = binder_poll, | |
5893 | .unlocked_ioctl = binder_ioctl, | |
1832f2d8 | 5894 | .compat_ioctl = compat_ptr_ioctl, |
355b0502 GKH |
5895 | .mmap = binder_mmap, |
5896 | .open = binder_open, | |
5897 | .flush = binder_flush, | |
5898 | .release = binder_release, | |
5899 | }; | |
5900 | ||
ac4812c5 MC |
5901 | static int __init init_binder_device(const char *name) |
5902 | { | |
5903 | int ret; | |
5904 | struct binder_device *binder_device; | |
5905 | ||
5906 | binder_device = kzalloc(sizeof(*binder_device), GFP_KERNEL); | |
5907 | if (!binder_device) | |
5908 | return -ENOMEM; | |
5909 | ||
5910 | binder_device->miscdev.fops = &binder_fops; | |
5911 | binder_device->miscdev.minor = MISC_DYNAMIC_MINOR; | |
5912 | binder_device->miscdev.name = name; | |
5913 | ||
f0fe2c0f | 5914 | refcount_set(&binder_device->ref, 1); |
ac4812c5 MC |
5915 | binder_device->context.binder_context_mgr_uid = INVALID_UID; |
5916 | binder_device->context.name = name; | |
c44b1231 | 5917 | mutex_init(&binder_device->context.context_mgr_node_lock); |
ac4812c5 MC |
5918 | |
5919 | ret = misc_register(&binder_device->miscdev); | |
5920 | if (ret < 0) { | |
5921 | kfree(binder_device); | |
5922 | return ret; | |
5923 | } | |
5924 | ||
5925 | hlist_add_head(&binder_device->hlist, &binder_devices); | |
5926 | ||
5927 | return ret; | |
5928 | } | |
5929 | ||
355b0502 GKH |
5930 | static int __init binder_init(void) |
5931 | { | |
5932 | int ret; | |
5b9633af | 5933 | char *device_name, *device_tmp; |
ac4812c5 MC |
5934 | struct binder_device *device; |
5935 | struct hlist_node *tmp; | |
5b9633af | 5936 | char *device_names = NULL; |
355b0502 | 5937 | |
533dfb25 TH |
5938 | ret = binder_alloc_shrinker_init(); |
5939 | if (ret) | |
5940 | return ret; | |
f2517eb7 | 5941 | |
d99c7333 TK |
5942 | atomic_set(&binder_transaction_log.cur, ~0U); |
5943 | atomic_set(&binder_transaction_log_failed.cur, ~0U); | |
5944 | ||
16b66554 AH |
5945 | binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL); |
5946 | if (binder_debugfs_dir_entry_root) | |
5947 | binder_debugfs_dir_entry_proc = debugfs_create_dir("proc", | |
5948 | binder_debugfs_dir_entry_root); | |
ac4812c5 | 5949 | |
16b66554 AH |
5950 | if (binder_debugfs_dir_entry_root) { |
5951 | debugfs_create_file("state", | |
21d02ddf | 5952 | 0444, |
16b66554 AH |
5953 | binder_debugfs_dir_entry_root, |
5954 | NULL, | |
0e13e452 | 5955 | &binder_state_fops); |
16b66554 | 5956 | debugfs_create_file("stats", |
21d02ddf | 5957 | 0444, |
16b66554 AH |
5958 | binder_debugfs_dir_entry_root, |
5959 | NULL, | |
0e13e452 | 5960 | &binder_stats_fops); |
16b66554 | 5961 | debugfs_create_file("transactions", |
21d02ddf | 5962 | 0444, |
16b66554 AH |
5963 | binder_debugfs_dir_entry_root, |
5964 | NULL, | |
0e13e452 | 5965 | &binder_transactions_fops); |
16b66554 | 5966 | debugfs_create_file("transaction_log", |
21d02ddf | 5967 | 0444, |
16b66554 AH |
5968 | binder_debugfs_dir_entry_root, |
5969 | &binder_transaction_log, | |
03e2e07e | 5970 | &binder_transaction_log_fops); |
16b66554 | 5971 | debugfs_create_file("failed_transaction_log", |
21d02ddf | 5972 | 0444, |
16b66554 AH |
5973 | binder_debugfs_dir_entry_root, |
5974 | &binder_transaction_log_failed, | |
03e2e07e | 5975 | &binder_transaction_log_fops); |
355b0502 | 5976 | } |
ac4812c5 | 5977 | |
ca2864c6 HV |
5978 | if (!IS_ENABLED(CONFIG_ANDROID_BINDERFS) && |
5979 | strcmp(binder_devices_param, "") != 0) { | |
793c8232 CB |
5980 | /* |
5981 | * Copy the module_parameter string, because we don't want to | |
5982 | * tokenize it in-place. | |
5983 | */ | |
5984 | device_names = kstrdup(binder_devices_param, GFP_KERNEL); | |
5985 | if (!device_names) { | |
5986 | ret = -ENOMEM; | |
5987 | goto err_alloc_device_names_failed; | |
5988 | } | |
ac4812c5 | 5989 | |
793c8232 CB |
5990 | device_tmp = device_names; |
5991 | while ((device_name = strsep(&device_tmp, ","))) { | |
5992 | ret = init_binder_device(device_name); | |
5993 | if (ret) | |
5994 | goto err_init_binder_device_failed; | |
5995 | } | |
ac4812c5 MC |
5996 | } |
5997 | ||
5b9633af CB |
5998 | ret = init_binderfs(); |
5999 | if (ret) | |
6000 | goto err_init_binder_device_failed; | |
6001 | ||
ac4812c5 MC |
6002 | return ret; |
6003 | ||
6004 | err_init_binder_device_failed: | |
6005 | hlist_for_each_entry_safe(device, tmp, &binder_devices, hlist) { | |
6006 | misc_deregister(&device->miscdev); | |
6007 | hlist_del(&device->hlist); | |
6008 | kfree(device); | |
6009 | } | |
22eb9476 CB |
6010 | |
6011 | kfree(device_names); | |
6012 | ||
ac4812c5 MC |
6013 | err_alloc_device_names_failed: |
6014 | debugfs_remove_recursive(binder_debugfs_dir_entry_root); | |
6015 | ||
355b0502 GKH |
6016 | return ret; |
6017 | } | |
6018 | ||
6019 | device_initcall(binder_init); | |
6020 | ||
975a1ac9 AH |
6021 | #define CREATE_TRACE_POINTS |
6022 | #include "binder_trace.h" | |
6023 | ||
355b0502 | 6024 | MODULE_LICENSE("GPL v2"); |