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355b0502 GKH |
1 | /* binder.c |
2 | * | |
3 | * Android IPC Subsystem | |
4 | * | |
5 | * Copyright (C) 2007-2008 Google, Inc. | |
6 | * | |
7 | * This software is licensed under the terms of the GNU General Public | |
8 | * License version 2, as published by the Free Software Foundation, and | |
9 | * may be copied, distributed, and modified under those terms. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | */ | |
17 | ||
56b468fc AS |
18 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
19 | ||
355b0502 GKH |
20 | #include <asm/cacheflush.h> |
21 | #include <linux/fdtable.h> | |
22 | #include <linux/file.h> | |
e2610b26 | 23 | #include <linux/freezer.h> |
355b0502 GKH |
24 | #include <linux/fs.h> |
25 | #include <linux/list.h> | |
26 | #include <linux/miscdevice.h> | |
355b0502 GKH |
27 | #include <linux/module.h> |
28 | #include <linux/mutex.h> | |
29 | #include <linux/nsproxy.h> | |
30 | #include <linux/poll.h> | |
16b66554 | 31 | #include <linux/debugfs.h> |
355b0502 | 32 | #include <linux/rbtree.h> |
3f07c014 | 33 | #include <linux/sched/signal.h> |
6e84f315 | 34 | #include <linux/sched/mm.h> |
5249f488 | 35 | #include <linux/seq_file.h> |
355b0502 | 36 | #include <linux/uaccess.h> |
17cf22c3 | 37 | #include <linux/pid_namespace.h> |
79af7307 | 38 | #include <linux/security.h> |
355b0502 | 39 | |
9246a4a9 GKH |
40 | #ifdef CONFIG_ANDROID_BINDER_IPC_32BIT |
41 | #define BINDER_IPC_32BIT 1 | |
42 | #endif | |
43 | ||
44 | #include <uapi/linux/android/binder.h> | |
0c972a05 | 45 | #include "binder_alloc.h" |
975a1ac9 | 46 | #include "binder_trace.h" |
355b0502 | 47 | |
975a1ac9 | 48 | static DEFINE_MUTEX(binder_main_lock); |
c44b1231 TK |
49 | |
50 | static HLIST_HEAD(binder_deferred_list); | |
355b0502 GKH |
51 | static DEFINE_MUTEX(binder_deferred_lock); |
52 | ||
ac4812c5 | 53 | static HLIST_HEAD(binder_devices); |
355b0502 | 54 | static HLIST_HEAD(binder_procs); |
c44b1231 TK |
55 | static DEFINE_MUTEX(binder_procs_lock); |
56 | ||
355b0502 | 57 | static HLIST_HEAD(binder_dead_nodes); |
c44b1231 | 58 | static DEFINE_SPINLOCK(binder_dead_nodes_lock); |
355b0502 | 59 | |
16b66554 AH |
60 | static struct dentry *binder_debugfs_dir_entry_root; |
61 | static struct dentry *binder_debugfs_dir_entry_proc; | |
355b0502 GKH |
62 | static int binder_last_id; |
63 | ||
5249f488 AH |
64 | #define BINDER_DEBUG_ENTRY(name) \ |
65 | static int binder_##name##_open(struct inode *inode, struct file *file) \ | |
66 | { \ | |
16b66554 | 67 | return single_open(file, binder_##name##_show, inode->i_private); \ |
5249f488 AH |
68 | } \ |
69 | \ | |
70 | static const struct file_operations binder_##name##_fops = { \ | |
71 | .owner = THIS_MODULE, \ | |
72 | .open = binder_##name##_open, \ | |
73 | .read = seq_read, \ | |
74 | .llseek = seq_lseek, \ | |
75 | .release = single_release, \ | |
76 | } | |
77 | ||
78 | static int binder_proc_show(struct seq_file *m, void *unused); | |
79 | BINDER_DEBUG_ENTRY(proc); | |
355b0502 GKH |
80 | |
81 | /* This is only defined in include/asm-arm/sizes.h */ | |
82 | #ifndef SZ_1K | |
83 | #define SZ_1K 0x400 | |
84 | #endif | |
85 | ||
86 | #ifndef SZ_4M | |
87 | #define SZ_4M 0x400000 | |
88 | #endif | |
89 | ||
90 | #define FORBIDDEN_MMAP_FLAGS (VM_WRITE) | |
91 | ||
92 | #define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64) | |
93 | ||
94 | enum { | |
95 | BINDER_DEBUG_USER_ERROR = 1U << 0, | |
96 | BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1, | |
97 | BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2, | |
98 | BINDER_DEBUG_OPEN_CLOSE = 1U << 3, | |
99 | BINDER_DEBUG_DEAD_BINDER = 1U << 4, | |
100 | BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5, | |
101 | BINDER_DEBUG_READ_WRITE = 1U << 6, | |
102 | BINDER_DEBUG_USER_REFS = 1U << 7, | |
103 | BINDER_DEBUG_THREADS = 1U << 8, | |
104 | BINDER_DEBUG_TRANSACTION = 1U << 9, | |
105 | BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10, | |
106 | BINDER_DEBUG_FREE_BUFFER = 1U << 11, | |
107 | BINDER_DEBUG_INTERNAL_REFS = 1U << 12, | |
19c98724 | 108 | BINDER_DEBUG_PRIORITY_CAP = 1U << 13, |
355b0502 GKH |
109 | }; |
110 | static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR | | |
111 | BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION; | |
112 | module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO); | |
113 | ||
ac4812c5 MC |
114 | static char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES; |
115 | module_param_named(devices, binder_devices_param, charp, 0444); | |
116 | ||
355b0502 GKH |
117 | static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait); |
118 | static int binder_stop_on_user_error; | |
119 | ||
120 | static int binder_set_stop_on_user_error(const char *val, | |
121 | struct kernel_param *kp) | |
122 | { | |
123 | int ret; | |
10f62861 | 124 | |
355b0502 GKH |
125 | ret = param_set_int(val, kp); |
126 | if (binder_stop_on_user_error < 2) | |
127 | wake_up(&binder_user_error_wait); | |
128 | return ret; | |
129 | } | |
130 | module_param_call(stop_on_user_error, binder_set_stop_on_user_error, | |
131 | param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO); | |
132 | ||
133 | #define binder_debug(mask, x...) \ | |
134 | do { \ | |
135 | if (binder_debug_mask & mask) \ | |
258767fe | 136 | pr_info(x); \ |
355b0502 GKH |
137 | } while (0) |
138 | ||
139 | #define binder_user_error(x...) \ | |
140 | do { \ | |
141 | if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \ | |
258767fe | 142 | pr_info(x); \ |
355b0502 GKH |
143 | if (binder_stop_on_user_error) \ |
144 | binder_stop_on_user_error = 2; \ | |
145 | } while (0) | |
146 | ||
feba3900 MC |
147 | #define to_flat_binder_object(hdr) \ |
148 | container_of(hdr, struct flat_binder_object, hdr) | |
149 | ||
150 | #define to_binder_fd_object(hdr) container_of(hdr, struct binder_fd_object, hdr) | |
151 | ||
7980240b MC |
152 | #define to_binder_buffer_object(hdr) \ |
153 | container_of(hdr, struct binder_buffer_object, hdr) | |
154 | ||
def95c73 MC |
155 | #define to_binder_fd_array_object(hdr) \ |
156 | container_of(hdr, struct binder_fd_array_object, hdr) | |
157 | ||
355b0502 GKH |
158 | enum binder_stat_types { |
159 | BINDER_STAT_PROC, | |
160 | BINDER_STAT_THREAD, | |
161 | BINDER_STAT_NODE, | |
162 | BINDER_STAT_REF, | |
163 | BINDER_STAT_DEATH, | |
164 | BINDER_STAT_TRANSACTION, | |
165 | BINDER_STAT_TRANSACTION_COMPLETE, | |
166 | BINDER_STAT_COUNT | |
167 | }; | |
168 | ||
169 | struct binder_stats { | |
0953c797 BJS |
170 | atomic_t br[_IOC_NR(BR_FAILED_REPLY) + 1]; |
171 | atomic_t bc[_IOC_NR(BC_REPLY_SG) + 1]; | |
172 | atomic_t obj_created[BINDER_STAT_COUNT]; | |
173 | atomic_t obj_deleted[BINDER_STAT_COUNT]; | |
355b0502 GKH |
174 | }; |
175 | ||
176 | static struct binder_stats binder_stats; | |
177 | ||
178 | static inline void binder_stats_deleted(enum binder_stat_types type) | |
179 | { | |
0953c797 | 180 | atomic_inc(&binder_stats.obj_deleted[type]); |
355b0502 GKH |
181 | } |
182 | ||
183 | static inline void binder_stats_created(enum binder_stat_types type) | |
184 | { | |
0953c797 | 185 | atomic_inc(&binder_stats.obj_created[type]); |
355b0502 GKH |
186 | } |
187 | ||
188 | struct binder_transaction_log_entry { | |
189 | int debug_id; | |
190 | int call_type; | |
191 | int from_proc; | |
192 | int from_thread; | |
193 | int target_handle; | |
194 | int to_proc; | |
195 | int to_thread; | |
196 | int to_node; | |
197 | int data_size; | |
198 | int offsets_size; | |
14db3181 | 199 | const char *context_name; |
355b0502 GKH |
200 | }; |
201 | struct binder_transaction_log { | |
202 | int next; | |
203 | int full; | |
204 | struct binder_transaction_log_entry entry[32]; | |
205 | }; | |
206 | static struct binder_transaction_log binder_transaction_log; | |
207 | static struct binder_transaction_log binder_transaction_log_failed; | |
208 | ||
209 | static struct binder_transaction_log_entry *binder_transaction_log_add( | |
210 | struct binder_transaction_log *log) | |
211 | { | |
212 | struct binder_transaction_log_entry *e; | |
10f62861 | 213 | |
355b0502 GKH |
214 | e = &log->entry[log->next]; |
215 | memset(e, 0, sizeof(*e)); | |
216 | log->next++; | |
217 | if (log->next == ARRAY_SIZE(log->entry)) { | |
218 | log->next = 0; | |
219 | log->full = 1; | |
220 | } | |
221 | return e; | |
222 | } | |
223 | ||
342e5c90 MC |
224 | struct binder_context { |
225 | struct binder_node *binder_context_mgr_node; | |
c44b1231 TK |
226 | struct mutex context_mgr_node_lock; |
227 | ||
342e5c90 | 228 | kuid_t binder_context_mgr_uid; |
14db3181 | 229 | const char *name; |
342e5c90 MC |
230 | }; |
231 | ||
ac4812c5 MC |
232 | struct binder_device { |
233 | struct hlist_node hlist; | |
234 | struct miscdevice miscdev; | |
235 | struct binder_context context; | |
342e5c90 MC |
236 | }; |
237 | ||
355b0502 GKH |
238 | struct binder_work { |
239 | struct list_head entry; | |
240 | enum { | |
241 | BINDER_WORK_TRANSACTION = 1, | |
242 | BINDER_WORK_TRANSACTION_COMPLETE, | |
243 | BINDER_WORK_NODE, | |
244 | BINDER_WORK_DEAD_BINDER, | |
245 | BINDER_WORK_DEAD_BINDER_AND_CLEAR, | |
246 | BINDER_WORK_CLEAR_DEATH_NOTIFICATION, | |
247 | } type; | |
248 | }; | |
249 | ||
250 | struct binder_node { | |
251 | int debug_id; | |
252 | struct binder_work work; | |
253 | union { | |
254 | struct rb_node rb_node; | |
255 | struct hlist_node dead_node; | |
256 | }; | |
257 | struct binder_proc *proc; | |
258 | struct hlist_head refs; | |
259 | int internal_strong_refs; | |
260 | int local_weak_refs; | |
261 | int local_strong_refs; | |
da49889d AH |
262 | binder_uintptr_t ptr; |
263 | binder_uintptr_t cookie; | |
355b0502 GKH |
264 | unsigned has_strong_ref:1; |
265 | unsigned pending_strong_ref:1; | |
266 | unsigned has_weak_ref:1; | |
267 | unsigned pending_weak_ref:1; | |
268 | unsigned has_async_transaction:1; | |
269 | unsigned accept_fds:1; | |
270 | unsigned min_priority:8; | |
271 | struct list_head async_todo; | |
272 | }; | |
273 | ||
274 | struct binder_ref_death { | |
275 | struct binder_work work; | |
da49889d | 276 | binder_uintptr_t cookie; |
355b0502 GKH |
277 | }; |
278 | ||
279 | struct binder_ref { | |
280 | /* Lookups needed: */ | |
281 | /* node + proc => ref (transaction) */ | |
282 | /* desc + proc => ref (transaction, inc/dec ref) */ | |
283 | /* node => refs + procs (proc exit) */ | |
284 | int debug_id; | |
285 | struct rb_node rb_node_desc; | |
286 | struct rb_node rb_node_node; | |
287 | struct hlist_node node_entry; | |
288 | struct binder_proc *proc; | |
289 | struct binder_node *node; | |
290 | uint32_t desc; | |
291 | int strong; | |
292 | int weak; | |
293 | struct binder_ref_death *death; | |
294 | }; | |
295 | ||
355b0502 GKH |
296 | enum binder_deferred_state { |
297 | BINDER_DEFERRED_PUT_FILES = 0x01, | |
298 | BINDER_DEFERRED_FLUSH = 0x02, | |
299 | BINDER_DEFERRED_RELEASE = 0x04, | |
300 | }; | |
301 | ||
302 | struct binder_proc { | |
303 | struct hlist_node proc_node; | |
304 | struct rb_root threads; | |
305 | struct rb_root nodes; | |
306 | struct rb_root refs_by_desc; | |
307 | struct rb_root refs_by_node; | |
308 | int pid; | |
355b0502 GKH |
309 | struct task_struct *tsk; |
310 | struct files_struct *files; | |
311 | struct hlist_node deferred_work_node; | |
312 | int deferred_work; | |
355b0502 | 313 | |
355b0502 GKH |
314 | struct list_head todo; |
315 | wait_queue_head_t wait; | |
316 | struct binder_stats stats; | |
317 | struct list_head delivered_death; | |
318 | int max_threads; | |
319 | int requested_threads; | |
320 | int requested_threads_started; | |
321 | int ready_threads; | |
322 | long default_priority; | |
16b66554 | 323 | struct dentry *debugfs_entry; |
fdfb4a99 | 324 | struct binder_alloc alloc; |
342e5c90 | 325 | struct binder_context *context; |
355b0502 GKH |
326 | }; |
327 | ||
328 | enum { | |
329 | BINDER_LOOPER_STATE_REGISTERED = 0x01, | |
330 | BINDER_LOOPER_STATE_ENTERED = 0x02, | |
331 | BINDER_LOOPER_STATE_EXITED = 0x04, | |
332 | BINDER_LOOPER_STATE_INVALID = 0x08, | |
333 | BINDER_LOOPER_STATE_WAITING = 0x10, | |
334 | BINDER_LOOPER_STATE_NEED_RETURN = 0x20 | |
335 | }; | |
336 | ||
337 | struct binder_thread { | |
338 | struct binder_proc *proc; | |
339 | struct rb_node rb_node; | |
340 | int pid; | |
341 | int looper; | |
342 | struct binder_transaction *transaction_stack; | |
343 | struct list_head todo; | |
344 | uint32_t return_error; /* Write failed, return error code in read buf */ | |
345 | uint32_t return_error2; /* Write failed, return error code in read */ | |
346 | /* buffer. Used when sending a reply to a dead process that */ | |
347 | /* we are also waiting on */ | |
348 | wait_queue_head_t wait; | |
349 | struct binder_stats stats; | |
350 | }; | |
351 | ||
352 | struct binder_transaction { | |
353 | int debug_id; | |
354 | struct binder_work work; | |
355 | struct binder_thread *from; | |
356 | struct binder_transaction *from_parent; | |
357 | struct binder_proc *to_proc; | |
358 | struct binder_thread *to_thread; | |
359 | struct binder_transaction *to_parent; | |
360 | unsigned need_reply:1; | |
361 | /* unsigned is_dead:1; */ /* not used at the moment */ | |
362 | ||
363 | struct binder_buffer *buffer; | |
364 | unsigned int code; | |
365 | unsigned int flags; | |
366 | long priority; | |
367 | long saved_priority; | |
4a2ebb93 | 368 | kuid_t sender_euid; |
355b0502 GKH |
369 | }; |
370 | ||
371 | static void | |
372 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer); | |
373 | ||
efde99cd | 374 | static int task_get_unused_fd_flags(struct binder_proc *proc, int flags) |
355b0502 GKH |
375 | { |
376 | struct files_struct *files = proc->files; | |
355b0502 GKH |
377 | unsigned long rlim_cur; |
378 | unsigned long irqs; | |
379 | ||
380 | if (files == NULL) | |
381 | return -ESRCH; | |
382 | ||
dcfadfa4 AV |
383 | if (!lock_task_sighand(proc->tsk, &irqs)) |
384 | return -EMFILE; | |
bf202361 | 385 | |
dcfadfa4 AV |
386 | rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE); |
387 | unlock_task_sighand(proc->tsk, &irqs); | |
355b0502 | 388 | |
dcfadfa4 | 389 | return __alloc_fd(files, 0, rlim_cur, flags); |
355b0502 GKH |
390 | } |
391 | ||
392 | /* | |
393 | * copied from fd_install | |
394 | */ | |
395 | static void task_fd_install( | |
396 | struct binder_proc *proc, unsigned int fd, struct file *file) | |
397 | { | |
f869e8a7 AV |
398 | if (proc->files) |
399 | __fd_install(proc->files, fd, file); | |
355b0502 GKH |
400 | } |
401 | ||
402 | /* | |
403 | * copied from sys_close | |
404 | */ | |
405 | static long task_close_fd(struct binder_proc *proc, unsigned int fd) | |
406 | { | |
355b0502 GKH |
407 | int retval; |
408 | ||
483ce1d4 | 409 | if (proc->files == NULL) |
355b0502 GKH |
410 | return -ESRCH; |
411 | ||
483ce1d4 | 412 | retval = __close_fd(proc->files, fd); |
355b0502 GKH |
413 | /* can't restart close syscall because file table entry was cleared */ |
414 | if (unlikely(retval == -ERESTARTSYS || | |
415 | retval == -ERESTARTNOINTR || | |
416 | retval == -ERESTARTNOHAND || | |
417 | retval == -ERESTART_RESTARTBLOCK)) | |
418 | retval = -EINTR; | |
419 | ||
420 | return retval; | |
355b0502 GKH |
421 | } |
422 | ||
975a1ac9 AH |
423 | static inline void binder_lock(const char *tag) |
424 | { | |
425 | trace_binder_lock(tag); | |
426 | mutex_lock(&binder_main_lock); | |
427 | trace_binder_locked(tag); | |
428 | } | |
429 | ||
430 | static inline void binder_unlock(const char *tag) | |
431 | { | |
432 | trace_binder_unlock(tag); | |
433 | mutex_unlock(&binder_main_lock); | |
434 | } | |
435 | ||
355b0502 GKH |
436 | static void binder_set_nice(long nice) |
437 | { | |
438 | long min_nice; | |
10f62861 | 439 | |
355b0502 GKH |
440 | if (can_nice(current, nice)) { |
441 | set_user_nice(current, nice); | |
442 | return; | |
443 | } | |
7aa2c016 | 444 | min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur); |
355b0502 | 445 | binder_debug(BINDER_DEBUG_PRIORITY_CAP, |
56b468fc AS |
446 | "%d: nice value %ld not allowed use %ld instead\n", |
447 | current->pid, nice, min_nice); | |
355b0502 | 448 | set_user_nice(current, min_nice); |
8698a745 | 449 | if (min_nice <= MAX_NICE) |
355b0502 | 450 | return; |
56b468fc | 451 | binder_user_error("%d RLIMIT_NICE not set\n", current->pid); |
355b0502 GKH |
452 | } |
453 | ||
355b0502 | 454 | static struct binder_node *binder_get_node(struct binder_proc *proc, |
da49889d | 455 | binder_uintptr_t ptr) |
355b0502 GKH |
456 | { |
457 | struct rb_node *n = proc->nodes.rb_node; | |
458 | struct binder_node *node; | |
459 | ||
460 | while (n) { | |
461 | node = rb_entry(n, struct binder_node, rb_node); | |
462 | ||
463 | if (ptr < node->ptr) | |
464 | n = n->rb_left; | |
465 | else if (ptr > node->ptr) | |
466 | n = n->rb_right; | |
467 | else | |
468 | return node; | |
469 | } | |
470 | return NULL; | |
471 | } | |
472 | ||
473 | static struct binder_node *binder_new_node(struct binder_proc *proc, | |
da49889d AH |
474 | binder_uintptr_t ptr, |
475 | binder_uintptr_t cookie) | |
355b0502 GKH |
476 | { |
477 | struct rb_node **p = &proc->nodes.rb_node; | |
478 | struct rb_node *parent = NULL; | |
479 | struct binder_node *node; | |
480 | ||
481 | while (*p) { | |
482 | parent = *p; | |
483 | node = rb_entry(parent, struct binder_node, rb_node); | |
484 | ||
485 | if (ptr < node->ptr) | |
486 | p = &(*p)->rb_left; | |
487 | else if (ptr > node->ptr) | |
488 | p = &(*p)->rb_right; | |
489 | else | |
490 | return NULL; | |
491 | } | |
492 | ||
493 | node = kzalloc(sizeof(*node), GFP_KERNEL); | |
494 | if (node == NULL) | |
495 | return NULL; | |
496 | binder_stats_created(BINDER_STAT_NODE); | |
497 | rb_link_node(&node->rb_node, parent, p); | |
498 | rb_insert_color(&node->rb_node, &proc->nodes); | |
499 | node->debug_id = ++binder_last_id; | |
500 | node->proc = proc; | |
501 | node->ptr = ptr; | |
502 | node->cookie = cookie; | |
503 | node->work.type = BINDER_WORK_NODE; | |
504 | INIT_LIST_HEAD(&node->work.entry); | |
505 | INIT_LIST_HEAD(&node->async_todo); | |
506 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
da49889d | 507 | "%d:%d node %d u%016llx c%016llx created\n", |
355b0502 | 508 | proc->pid, current->pid, node->debug_id, |
da49889d | 509 | (u64)node->ptr, (u64)node->cookie); |
355b0502 GKH |
510 | return node; |
511 | } | |
512 | ||
513 | static int binder_inc_node(struct binder_node *node, int strong, int internal, | |
514 | struct list_head *target_list) | |
515 | { | |
516 | if (strong) { | |
517 | if (internal) { | |
518 | if (target_list == NULL && | |
519 | node->internal_strong_refs == 0 && | |
342e5c90 MC |
520 | !(node->proc && |
521 | node == node->proc->context->binder_context_mgr_node && | |
522 | node->has_strong_ref)) { | |
56b468fc AS |
523 | pr_err("invalid inc strong node for %d\n", |
524 | node->debug_id); | |
355b0502 GKH |
525 | return -EINVAL; |
526 | } | |
527 | node->internal_strong_refs++; | |
528 | } else | |
529 | node->local_strong_refs++; | |
530 | if (!node->has_strong_ref && target_list) { | |
531 | list_del_init(&node->work.entry); | |
532 | list_add_tail(&node->work.entry, target_list); | |
533 | } | |
534 | } else { | |
535 | if (!internal) | |
536 | node->local_weak_refs++; | |
537 | if (!node->has_weak_ref && list_empty(&node->work.entry)) { | |
538 | if (target_list == NULL) { | |
56b468fc AS |
539 | pr_err("invalid inc weak node for %d\n", |
540 | node->debug_id); | |
355b0502 GKH |
541 | return -EINVAL; |
542 | } | |
543 | list_add_tail(&node->work.entry, target_list); | |
544 | } | |
545 | } | |
546 | return 0; | |
547 | } | |
548 | ||
549 | static int binder_dec_node(struct binder_node *node, int strong, int internal) | |
550 | { | |
551 | if (strong) { | |
552 | if (internal) | |
553 | node->internal_strong_refs--; | |
554 | else | |
555 | node->local_strong_refs--; | |
556 | if (node->local_strong_refs || node->internal_strong_refs) | |
557 | return 0; | |
558 | } else { | |
559 | if (!internal) | |
560 | node->local_weak_refs--; | |
561 | if (node->local_weak_refs || !hlist_empty(&node->refs)) | |
562 | return 0; | |
563 | } | |
564 | if (node->proc && (node->has_strong_ref || node->has_weak_ref)) { | |
565 | if (list_empty(&node->work.entry)) { | |
566 | list_add_tail(&node->work.entry, &node->proc->todo); | |
567 | wake_up_interruptible(&node->proc->wait); | |
568 | } | |
569 | } else { | |
570 | if (hlist_empty(&node->refs) && !node->local_strong_refs && | |
571 | !node->local_weak_refs) { | |
572 | list_del_init(&node->work.entry); | |
573 | if (node->proc) { | |
574 | rb_erase(&node->rb_node, &node->proc->nodes); | |
575 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
56b468fc | 576 | "refless node %d deleted\n", |
355b0502 GKH |
577 | node->debug_id); |
578 | } else { | |
c44b1231 | 579 | spin_lock(&binder_dead_nodes_lock); |
355b0502 | 580 | hlist_del(&node->dead_node); |
c44b1231 | 581 | spin_unlock(&binder_dead_nodes_lock); |
355b0502 | 582 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
56b468fc | 583 | "dead node %d deleted\n", |
355b0502 GKH |
584 | node->debug_id); |
585 | } | |
586 | kfree(node); | |
587 | binder_stats_deleted(BINDER_STAT_NODE); | |
588 | } | |
589 | } | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | ||
595 | static struct binder_ref *binder_get_ref(struct binder_proc *proc, | |
0a3ffab9 | 596 | u32 desc, bool need_strong_ref) |
355b0502 GKH |
597 | { |
598 | struct rb_node *n = proc->refs_by_desc.rb_node; | |
599 | struct binder_ref *ref; | |
600 | ||
601 | while (n) { | |
602 | ref = rb_entry(n, struct binder_ref, rb_node_desc); | |
603 | ||
0a3ffab9 | 604 | if (desc < ref->desc) { |
355b0502 | 605 | n = n->rb_left; |
0a3ffab9 | 606 | } else if (desc > ref->desc) { |
355b0502 | 607 | n = n->rb_right; |
0a3ffab9 AH |
608 | } else if (need_strong_ref && !ref->strong) { |
609 | binder_user_error("tried to use weak ref as strong ref\n"); | |
610 | return NULL; | |
611 | } else { | |
355b0502 | 612 | return ref; |
0a3ffab9 | 613 | } |
355b0502 GKH |
614 | } |
615 | return NULL; | |
616 | } | |
617 | ||
618 | static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc, | |
619 | struct binder_node *node) | |
620 | { | |
621 | struct rb_node *n; | |
622 | struct rb_node **p = &proc->refs_by_node.rb_node; | |
623 | struct rb_node *parent = NULL; | |
624 | struct binder_ref *ref, *new_ref; | |
342e5c90 | 625 | struct binder_context *context = proc->context; |
355b0502 GKH |
626 | |
627 | while (*p) { | |
628 | parent = *p; | |
629 | ref = rb_entry(parent, struct binder_ref, rb_node_node); | |
630 | ||
631 | if (node < ref->node) | |
632 | p = &(*p)->rb_left; | |
633 | else if (node > ref->node) | |
634 | p = &(*p)->rb_right; | |
635 | else | |
636 | return ref; | |
637 | } | |
638 | new_ref = kzalloc(sizeof(*ref), GFP_KERNEL); | |
639 | if (new_ref == NULL) | |
640 | return NULL; | |
641 | binder_stats_created(BINDER_STAT_REF); | |
642 | new_ref->debug_id = ++binder_last_id; | |
643 | new_ref->proc = proc; | |
644 | new_ref->node = node; | |
645 | rb_link_node(&new_ref->rb_node_node, parent, p); | |
646 | rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node); | |
647 | ||
342e5c90 | 648 | new_ref->desc = (node == context->binder_context_mgr_node) ? 0 : 1; |
355b0502 GKH |
649 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
650 | ref = rb_entry(n, struct binder_ref, rb_node_desc); | |
651 | if (ref->desc > new_ref->desc) | |
652 | break; | |
653 | new_ref->desc = ref->desc + 1; | |
654 | } | |
655 | ||
656 | p = &proc->refs_by_desc.rb_node; | |
657 | while (*p) { | |
658 | parent = *p; | |
659 | ref = rb_entry(parent, struct binder_ref, rb_node_desc); | |
660 | ||
661 | if (new_ref->desc < ref->desc) | |
662 | p = &(*p)->rb_left; | |
663 | else if (new_ref->desc > ref->desc) | |
664 | p = &(*p)->rb_right; | |
665 | else | |
666 | BUG(); | |
667 | } | |
668 | rb_link_node(&new_ref->rb_node_desc, parent, p); | |
669 | rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc); | |
670 | if (node) { | |
671 | hlist_add_head(&new_ref->node_entry, &node->refs); | |
672 | ||
673 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
56b468fc AS |
674 | "%d new ref %d desc %d for node %d\n", |
675 | proc->pid, new_ref->debug_id, new_ref->desc, | |
676 | node->debug_id); | |
355b0502 GKH |
677 | } else { |
678 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
56b468fc AS |
679 | "%d new ref %d desc %d for dead node\n", |
680 | proc->pid, new_ref->debug_id, new_ref->desc); | |
355b0502 GKH |
681 | } |
682 | return new_ref; | |
683 | } | |
684 | ||
685 | static void binder_delete_ref(struct binder_ref *ref) | |
686 | { | |
687 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
56b468fc AS |
688 | "%d delete ref %d desc %d for node %d\n", |
689 | ref->proc->pid, ref->debug_id, ref->desc, | |
690 | ref->node->debug_id); | |
355b0502 GKH |
691 | |
692 | rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc); | |
693 | rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node); | |
694 | if (ref->strong) | |
695 | binder_dec_node(ref->node, 1, 1); | |
696 | hlist_del(&ref->node_entry); | |
697 | binder_dec_node(ref->node, 0, 1); | |
698 | if (ref->death) { | |
699 | binder_debug(BINDER_DEBUG_DEAD_BINDER, | |
56b468fc AS |
700 | "%d delete ref %d desc %d has death notification\n", |
701 | ref->proc->pid, ref->debug_id, ref->desc); | |
355b0502 GKH |
702 | list_del(&ref->death->work.entry); |
703 | kfree(ref->death); | |
704 | binder_stats_deleted(BINDER_STAT_DEATH); | |
705 | } | |
706 | kfree(ref); | |
707 | binder_stats_deleted(BINDER_STAT_REF); | |
708 | } | |
709 | ||
710 | static int binder_inc_ref(struct binder_ref *ref, int strong, | |
711 | struct list_head *target_list) | |
712 | { | |
713 | int ret; | |
10f62861 | 714 | |
355b0502 GKH |
715 | if (strong) { |
716 | if (ref->strong == 0) { | |
717 | ret = binder_inc_node(ref->node, 1, 1, target_list); | |
718 | if (ret) | |
719 | return ret; | |
720 | } | |
721 | ref->strong++; | |
722 | } else { | |
723 | if (ref->weak == 0) { | |
724 | ret = binder_inc_node(ref->node, 0, 1, target_list); | |
725 | if (ret) | |
726 | return ret; | |
727 | } | |
728 | ref->weak++; | |
729 | } | |
730 | return 0; | |
731 | } | |
732 | ||
733 | ||
734 | static int binder_dec_ref(struct binder_ref *ref, int strong) | |
735 | { | |
736 | if (strong) { | |
737 | if (ref->strong == 0) { | |
56b468fc | 738 | binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n", |
355b0502 GKH |
739 | ref->proc->pid, ref->debug_id, |
740 | ref->desc, ref->strong, ref->weak); | |
741 | return -EINVAL; | |
742 | } | |
743 | ref->strong--; | |
744 | if (ref->strong == 0) { | |
745 | int ret; | |
10f62861 | 746 | |
355b0502 GKH |
747 | ret = binder_dec_node(ref->node, strong, 1); |
748 | if (ret) | |
749 | return ret; | |
750 | } | |
751 | } else { | |
752 | if (ref->weak == 0) { | |
56b468fc | 753 | binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n", |
355b0502 GKH |
754 | ref->proc->pid, ref->debug_id, |
755 | ref->desc, ref->strong, ref->weak); | |
756 | return -EINVAL; | |
757 | } | |
758 | ref->weak--; | |
759 | } | |
760 | if (ref->strong == 0 && ref->weak == 0) | |
761 | binder_delete_ref(ref); | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static void binder_pop_transaction(struct binder_thread *target_thread, | |
766 | struct binder_transaction *t) | |
767 | { | |
768 | if (target_thread) { | |
769 | BUG_ON(target_thread->transaction_stack != t); | |
770 | BUG_ON(target_thread->transaction_stack->from != target_thread); | |
771 | target_thread->transaction_stack = | |
772 | target_thread->transaction_stack->from_parent; | |
773 | t->from = NULL; | |
774 | } | |
775 | t->need_reply = 0; | |
776 | if (t->buffer) | |
777 | t->buffer->transaction = NULL; | |
778 | kfree(t); | |
779 | binder_stats_deleted(BINDER_STAT_TRANSACTION); | |
780 | } | |
781 | ||
782 | static void binder_send_failed_reply(struct binder_transaction *t, | |
783 | uint32_t error_code) | |
784 | { | |
785 | struct binder_thread *target_thread; | |
d4ec15e1 | 786 | struct binder_transaction *next; |
10f62861 | 787 | |
355b0502 GKH |
788 | BUG_ON(t->flags & TF_ONE_WAY); |
789 | while (1) { | |
790 | target_thread = t->from; | |
791 | if (target_thread) { | |
792 | if (target_thread->return_error != BR_OK && | |
793 | target_thread->return_error2 == BR_OK) { | |
794 | target_thread->return_error2 = | |
795 | target_thread->return_error; | |
796 | target_thread->return_error = BR_OK; | |
797 | } | |
798 | if (target_thread->return_error == BR_OK) { | |
799 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, | |
56b468fc | 800 | "send failed reply for transaction %d to %d:%d\n", |
0232a42c WP |
801 | t->debug_id, |
802 | target_thread->proc->pid, | |
355b0502 GKH |
803 | target_thread->pid); |
804 | ||
805 | binder_pop_transaction(target_thread, t); | |
806 | target_thread->return_error = error_code; | |
807 | wake_up_interruptible(&target_thread->wait); | |
808 | } else { | |
56b468fc AS |
809 | pr_err("reply failed, target thread, %d:%d, has error code %d already\n", |
810 | target_thread->proc->pid, | |
355b0502 GKH |
811 | target_thread->pid, |
812 | target_thread->return_error); | |
813 | } | |
814 | return; | |
d4ec15e1 LT |
815 | } |
816 | next = t->from_parent; | |
817 | ||
818 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, | |
819 | "send failed reply for transaction %d, target dead\n", | |
820 | t->debug_id); | |
821 | ||
822 | binder_pop_transaction(target_thread, t); | |
823 | if (next == NULL) { | |
355b0502 | 824 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
d4ec15e1 LT |
825 | "reply failed, no target thread at root\n"); |
826 | return; | |
355b0502 | 827 | } |
d4ec15e1 LT |
828 | t = next; |
829 | binder_debug(BINDER_DEBUG_DEAD_BINDER, | |
830 | "reply failed, no target thread -- retry %d\n", | |
831 | t->debug_id); | |
355b0502 GKH |
832 | } |
833 | } | |
834 | ||
feba3900 MC |
835 | /** |
836 | * binder_validate_object() - checks for a valid metadata object in a buffer. | |
837 | * @buffer: binder_buffer that we're parsing. | |
838 | * @offset: offset in the buffer at which to validate an object. | |
839 | * | |
840 | * Return: If there's a valid metadata object at @offset in @buffer, the | |
841 | * size of that object. Otherwise, it returns zero. | |
842 | */ | |
843 | static size_t binder_validate_object(struct binder_buffer *buffer, u64 offset) | |
844 | { | |
845 | /* Check if we can read a header first */ | |
846 | struct binder_object_header *hdr; | |
847 | size_t object_size = 0; | |
848 | ||
849 | if (offset > buffer->data_size - sizeof(*hdr) || | |
850 | buffer->data_size < sizeof(*hdr) || | |
851 | !IS_ALIGNED(offset, sizeof(u32))) | |
852 | return 0; | |
853 | ||
854 | /* Ok, now see if we can read a complete object. */ | |
855 | hdr = (struct binder_object_header *)(buffer->data + offset); | |
856 | switch (hdr->type) { | |
857 | case BINDER_TYPE_BINDER: | |
858 | case BINDER_TYPE_WEAK_BINDER: | |
859 | case BINDER_TYPE_HANDLE: | |
860 | case BINDER_TYPE_WEAK_HANDLE: | |
861 | object_size = sizeof(struct flat_binder_object); | |
862 | break; | |
863 | case BINDER_TYPE_FD: | |
864 | object_size = sizeof(struct binder_fd_object); | |
865 | break; | |
7980240b MC |
866 | case BINDER_TYPE_PTR: |
867 | object_size = sizeof(struct binder_buffer_object); | |
868 | break; | |
def95c73 MC |
869 | case BINDER_TYPE_FDA: |
870 | object_size = sizeof(struct binder_fd_array_object); | |
871 | break; | |
feba3900 MC |
872 | default: |
873 | return 0; | |
874 | } | |
875 | if (offset <= buffer->data_size - object_size && | |
876 | buffer->data_size >= object_size) | |
877 | return object_size; | |
878 | else | |
879 | return 0; | |
880 | } | |
881 | ||
7980240b MC |
882 | /** |
883 | * binder_validate_ptr() - validates binder_buffer_object in a binder_buffer. | |
884 | * @b: binder_buffer containing the object | |
885 | * @index: index in offset array at which the binder_buffer_object is | |
886 | * located | |
887 | * @start: points to the start of the offset array | |
888 | * @num_valid: the number of valid offsets in the offset array | |
889 | * | |
890 | * Return: If @index is within the valid range of the offset array | |
891 | * described by @start and @num_valid, and if there's a valid | |
892 | * binder_buffer_object at the offset found in index @index | |
893 | * of the offset array, that object is returned. Otherwise, | |
894 | * %NULL is returned. | |
895 | * Note that the offset found in index @index itself is not | |
896 | * verified; this function assumes that @num_valid elements | |
897 | * from @start were previously verified to have valid offsets. | |
898 | */ | |
899 | static struct binder_buffer_object *binder_validate_ptr(struct binder_buffer *b, | |
900 | binder_size_t index, | |
901 | binder_size_t *start, | |
902 | binder_size_t num_valid) | |
903 | { | |
904 | struct binder_buffer_object *buffer_obj; | |
905 | binder_size_t *offp; | |
906 | ||
907 | if (index >= num_valid) | |
908 | return NULL; | |
909 | ||
910 | offp = start + index; | |
911 | buffer_obj = (struct binder_buffer_object *)(b->data + *offp); | |
912 | if (buffer_obj->hdr.type != BINDER_TYPE_PTR) | |
913 | return NULL; | |
914 | ||
915 | return buffer_obj; | |
916 | } | |
917 | ||
918 | /** | |
919 | * binder_validate_fixup() - validates pointer/fd fixups happen in order. | |
920 | * @b: transaction buffer | |
921 | * @objects_start start of objects buffer | |
922 | * @buffer: binder_buffer_object in which to fix up | |
923 | * @offset: start offset in @buffer to fix up | |
924 | * @last_obj: last binder_buffer_object that we fixed up in | |
925 | * @last_min_offset: minimum fixup offset in @last_obj | |
926 | * | |
927 | * Return: %true if a fixup in buffer @buffer at offset @offset is | |
928 | * allowed. | |
929 | * | |
930 | * For safety reasons, we only allow fixups inside a buffer to happen | |
931 | * at increasing offsets; additionally, we only allow fixup on the last | |
932 | * buffer object that was verified, or one of its parents. | |
933 | * | |
934 | * Example of what is allowed: | |
935 | * | |
936 | * A | |
937 | * B (parent = A, offset = 0) | |
938 | * C (parent = A, offset = 16) | |
939 | * D (parent = C, offset = 0) | |
940 | * E (parent = A, offset = 32) // min_offset is 16 (C.parent_offset) | |
941 | * | |
942 | * Examples of what is not allowed: | |
943 | * | |
944 | * Decreasing offsets within the same parent: | |
945 | * A | |
946 | * C (parent = A, offset = 16) | |
947 | * B (parent = A, offset = 0) // decreasing offset within A | |
948 | * | |
949 | * Referring to a parent that wasn't the last object or any of its parents: | |
950 | * A | |
951 | * B (parent = A, offset = 0) | |
952 | * C (parent = A, offset = 0) | |
953 | * C (parent = A, offset = 16) | |
954 | * D (parent = B, offset = 0) // B is not A or any of A's parents | |
955 | */ | |
956 | static bool binder_validate_fixup(struct binder_buffer *b, | |
957 | binder_size_t *objects_start, | |
958 | struct binder_buffer_object *buffer, | |
959 | binder_size_t fixup_offset, | |
960 | struct binder_buffer_object *last_obj, | |
961 | binder_size_t last_min_offset) | |
962 | { | |
963 | if (!last_obj) { | |
964 | /* Nothing to fix up in */ | |
965 | return false; | |
966 | } | |
967 | ||
968 | while (last_obj != buffer) { | |
969 | /* | |
970 | * Safe to retrieve the parent of last_obj, since it | |
971 | * was already previously verified by the driver. | |
972 | */ | |
973 | if ((last_obj->flags & BINDER_BUFFER_FLAG_HAS_PARENT) == 0) | |
974 | return false; | |
975 | last_min_offset = last_obj->parent_offset + sizeof(uintptr_t); | |
976 | last_obj = (struct binder_buffer_object *) | |
977 | (b->data + *(objects_start + last_obj->parent)); | |
978 | } | |
979 | return (fixup_offset >= last_min_offset); | |
980 | } | |
981 | ||
355b0502 GKH |
982 | static void binder_transaction_buffer_release(struct binder_proc *proc, |
983 | struct binder_buffer *buffer, | |
da49889d | 984 | binder_size_t *failed_at) |
355b0502 | 985 | { |
7980240b | 986 | binder_size_t *offp, *off_start, *off_end; |
355b0502 GKH |
987 | int debug_id = buffer->debug_id; |
988 | ||
989 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
56b468fc | 990 | "%d buffer release %d, size %zd-%zd, failed at %p\n", |
355b0502 GKH |
991 | proc->pid, buffer->debug_id, |
992 | buffer->data_size, buffer->offsets_size, failed_at); | |
993 | ||
994 | if (buffer->target_node) | |
995 | binder_dec_node(buffer->target_node, 1, 0); | |
996 | ||
7980240b MC |
997 | off_start = (binder_size_t *)(buffer->data + |
998 | ALIGN(buffer->data_size, sizeof(void *))); | |
355b0502 GKH |
999 | if (failed_at) |
1000 | off_end = failed_at; | |
1001 | else | |
7980240b MC |
1002 | off_end = (void *)off_start + buffer->offsets_size; |
1003 | for (offp = off_start; offp < off_end; offp++) { | |
feba3900 MC |
1004 | struct binder_object_header *hdr; |
1005 | size_t object_size = binder_validate_object(buffer, *offp); | |
10f62861 | 1006 | |
feba3900 MC |
1007 | if (object_size == 0) { |
1008 | pr_err("transaction release %d bad object at offset %lld, size %zd\n", | |
da49889d | 1009 | debug_id, (u64)*offp, buffer->data_size); |
355b0502 GKH |
1010 | continue; |
1011 | } | |
feba3900 MC |
1012 | hdr = (struct binder_object_header *)(buffer->data + *offp); |
1013 | switch (hdr->type) { | |
355b0502 GKH |
1014 | case BINDER_TYPE_BINDER: |
1015 | case BINDER_TYPE_WEAK_BINDER: { | |
feba3900 MC |
1016 | struct flat_binder_object *fp; |
1017 | struct binder_node *node; | |
10f62861 | 1018 | |
feba3900 MC |
1019 | fp = to_flat_binder_object(hdr); |
1020 | node = binder_get_node(proc, fp->binder); | |
355b0502 | 1021 | if (node == NULL) { |
da49889d AH |
1022 | pr_err("transaction release %d bad node %016llx\n", |
1023 | debug_id, (u64)fp->binder); | |
355b0502 GKH |
1024 | break; |
1025 | } | |
1026 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
da49889d AH |
1027 | " node %d u%016llx\n", |
1028 | node->debug_id, (u64)node->ptr); | |
feba3900 MC |
1029 | binder_dec_node(node, hdr->type == BINDER_TYPE_BINDER, |
1030 | 0); | |
355b0502 GKH |
1031 | } break; |
1032 | case BINDER_TYPE_HANDLE: | |
1033 | case BINDER_TYPE_WEAK_HANDLE: { | |
feba3900 | 1034 | struct flat_binder_object *fp; |
0a3ffab9 AH |
1035 | struct binder_ref *ref; |
1036 | ||
feba3900 | 1037 | fp = to_flat_binder_object(hdr); |
0a3ffab9 | 1038 | ref = binder_get_ref(proc, fp->handle, |
feba3900 | 1039 | hdr->type == BINDER_TYPE_HANDLE); |
355b0502 | 1040 | if (ref == NULL) { |
64dcfe6b | 1041 | pr_err("transaction release %d bad handle %d\n", |
56b468fc | 1042 | debug_id, fp->handle); |
355b0502 GKH |
1043 | break; |
1044 | } | |
1045 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
1046 | " ref %d desc %d (node %d)\n", | |
1047 | ref->debug_id, ref->desc, ref->node->debug_id); | |
feba3900 | 1048 | binder_dec_ref(ref, hdr->type == BINDER_TYPE_HANDLE); |
355b0502 GKH |
1049 | } break; |
1050 | ||
feba3900 MC |
1051 | case BINDER_TYPE_FD: { |
1052 | struct binder_fd_object *fp = to_binder_fd_object(hdr); | |
1053 | ||
355b0502 | 1054 | binder_debug(BINDER_DEBUG_TRANSACTION, |
feba3900 | 1055 | " fd %d\n", fp->fd); |
355b0502 | 1056 | if (failed_at) |
feba3900 MC |
1057 | task_close_fd(proc, fp->fd); |
1058 | } break; | |
7980240b MC |
1059 | case BINDER_TYPE_PTR: |
1060 | /* | |
1061 | * Nothing to do here, this will get cleaned up when the | |
1062 | * transaction buffer gets freed | |
1063 | */ | |
1064 | break; | |
def95c73 MC |
1065 | case BINDER_TYPE_FDA: { |
1066 | struct binder_fd_array_object *fda; | |
1067 | struct binder_buffer_object *parent; | |
1068 | uintptr_t parent_buffer; | |
1069 | u32 *fd_array; | |
1070 | size_t fd_index; | |
1071 | binder_size_t fd_buf_size; | |
1072 | ||
1073 | fda = to_binder_fd_array_object(hdr); | |
1074 | parent = binder_validate_ptr(buffer, fda->parent, | |
1075 | off_start, | |
1076 | offp - off_start); | |
1077 | if (!parent) { | |
1078 | pr_err("transaction release %d bad parent offset", | |
1079 | debug_id); | |
1080 | continue; | |
1081 | } | |
1082 | /* | |
1083 | * Since the parent was already fixed up, convert it | |
1084 | * back to kernel address space to access it | |
1085 | */ | |
1086 | parent_buffer = parent->buffer - | |
19c98724 TK |
1087 | binder_alloc_get_user_buffer_offset( |
1088 | &proc->alloc); | |
def95c73 MC |
1089 | |
1090 | fd_buf_size = sizeof(u32) * fda->num_fds; | |
1091 | if (fda->num_fds >= SIZE_MAX / sizeof(u32)) { | |
1092 | pr_err("transaction release %d invalid number of fds (%lld)\n", | |
1093 | debug_id, (u64)fda->num_fds); | |
1094 | continue; | |
1095 | } | |
1096 | if (fd_buf_size > parent->length || | |
1097 | fda->parent_offset > parent->length - fd_buf_size) { | |
1098 | /* No space for all file descriptors here. */ | |
1099 | pr_err("transaction release %d not enough space for %lld fds in buffer\n", | |
1100 | debug_id, (u64)fda->num_fds); | |
1101 | continue; | |
1102 | } | |
1103 | fd_array = (u32 *)(parent_buffer + fda->parent_offset); | |
1104 | for (fd_index = 0; fd_index < fda->num_fds; fd_index++) | |
1105 | task_close_fd(proc, fd_array[fd_index]); | |
1106 | } break; | |
355b0502 | 1107 | default: |
64dcfe6b | 1108 | pr_err("transaction release %d bad object type %x\n", |
feba3900 | 1109 | debug_id, hdr->type); |
355b0502 GKH |
1110 | break; |
1111 | } | |
1112 | } | |
1113 | } | |
1114 | ||
a056af42 MC |
1115 | static int binder_translate_binder(struct flat_binder_object *fp, |
1116 | struct binder_transaction *t, | |
1117 | struct binder_thread *thread) | |
1118 | { | |
1119 | struct binder_node *node; | |
1120 | struct binder_ref *ref; | |
1121 | struct binder_proc *proc = thread->proc; | |
1122 | struct binder_proc *target_proc = t->to_proc; | |
1123 | ||
1124 | node = binder_get_node(proc, fp->binder); | |
1125 | if (!node) { | |
1126 | node = binder_new_node(proc, fp->binder, fp->cookie); | |
1127 | if (!node) | |
1128 | return -ENOMEM; | |
1129 | ||
1130 | node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK; | |
1131 | node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS); | |
1132 | } | |
1133 | if (fp->cookie != node->cookie) { | |
1134 | binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n", | |
1135 | proc->pid, thread->pid, (u64)fp->binder, | |
1136 | node->debug_id, (u64)fp->cookie, | |
1137 | (u64)node->cookie); | |
1138 | return -EINVAL; | |
1139 | } | |
1140 | if (security_binder_transfer_binder(proc->tsk, target_proc->tsk)) | |
1141 | return -EPERM; | |
1142 | ||
1143 | ref = binder_get_ref_for_node(target_proc, node); | |
1144 | if (!ref) | |
1145 | return -EINVAL; | |
1146 | ||
1147 | if (fp->hdr.type == BINDER_TYPE_BINDER) | |
1148 | fp->hdr.type = BINDER_TYPE_HANDLE; | |
1149 | else | |
1150 | fp->hdr.type = BINDER_TYPE_WEAK_HANDLE; | |
1151 | fp->binder = 0; | |
1152 | fp->handle = ref->desc; | |
1153 | fp->cookie = 0; | |
1154 | binder_inc_ref(ref, fp->hdr.type == BINDER_TYPE_HANDLE, &thread->todo); | |
1155 | ||
1156 | trace_binder_transaction_node_to_ref(t, node, ref); | |
1157 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
1158 | " node %d u%016llx -> ref %d desc %d\n", | |
1159 | node->debug_id, (u64)node->ptr, | |
1160 | ref->debug_id, ref->desc); | |
1161 | ||
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | static int binder_translate_handle(struct flat_binder_object *fp, | |
1166 | struct binder_transaction *t, | |
1167 | struct binder_thread *thread) | |
1168 | { | |
1169 | struct binder_ref *ref; | |
1170 | struct binder_proc *proc = thread->proc; | |
1171 | struct binder_proc *target_proc = t->to_proc; | |
1172 | ||
1173 | ref = binder_get_ref(proc, fp->handle, | |
1174 | fp->hdr.type == BINDER_TYPE_HANDLE); | |
1175 | if (!ref) { | |
1176 | binder_user_error("%d:%d got transaction with invalid handle, %d\n", | |
1177 | proc->pid, thread->pid, fp->handle); | |
1178 | return -EINVAL; | |
1179 | } | |
1180 | if (security_binder_transfer_binder(proc->tsk, target_proc->tsk)) | |
1181 | return -EPERM; | |
1182 | ||
1183 | if (ref->node->proc == target_proc) { | |
1184 | if (fp->hdr.type == BINDER_TYPE_HANDLE) | |
1185 | fp->hdr.type = BINDER_TYPE_BINDER; | |
1186 | else | |
1187 | fp->hdr.type = BINDER_TYPE_WEAK_BINDER; | |
1188 | fp->binder = ref->node->ptr; | |
1189 | fp->cookie = ref->node->cookie; | |
1190 | binder_inc_node(ref->node, fp->hdr.type == BINDER_TYPE_BINDER, | |
1191 | 0, NULL); | |
1192 | trace_binder_transaction_ref_to_node(t, ref); | |
1193 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
1194 | " ref %d desc %d -> node %d u%016llx\n", | |
1195 | ref->debug_id, ref->desc, ref->node->debug_id, | |
1196 | (u64)ref->node->ptr); | |
1197 | } else { | |
1198 | struct binder_ref *new_ref; | |
1199 | ||
1200 | new_ref = binder_get_ref_for_node(target_proc, ref->node); | |
1201 | if (!new_ref) | |
1202 | return -EINVAL; | |
1203 | ||
1204 | fp->binder = 0; | |
1205 | fp->handle = new_ref->desc; | |
1206 | fp->cookie = 0; | |
1207 | binder_inc_ref(new_ref, fp->hdr.type == BINDER_TYPE_HANDLE, | |
1208 | NULL); | |
1209 | trace_binder_transaction_ref_to_ref(t, ref, new_ref); | |
1210 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
1211 | " ref %d desc %d -> ref %d desc %d (node %d)\n", | |
1212 | ref->debug_id, ref->desc, new_ref->debug_id, | |
1213 | new_ref->desc, ref->node->debug_id); | |
1214 | } | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | static int binder_translate_fd(int fd, | |
1219 | struct binder_transaction *t, | |
1220 | struct binder_thread *thread, | |
1221 | struct binder_transaction *in_reply_to) | |
1222 | { | |
1223 | struct binder_proc *proc = thread->proc; | |
1224 | struct binder_proc *target_proc = t->to_proc; | |
1225 | int target_fd; | |
1226 | struct file *file; | |
1227 | int ret; | |
1228 | bool target_allows_fd; | |
1229 | ||
1230 | if (in_reply_to) | |
1231 | target_allows_fd = !!(in_reply_to->flags & TF_ACCEPT_FDS); | |
1232 | else | |
1233 | target_allows_fd = t->buffer->target_node->accept_fds; | |
1234 | if (!target_allows_fd) { | |
1235 | binder_user_error("%d:%d got %s with fd, %d, but target does not allow fds\n", | |
1236 | proc->pid, thread->pid, | |
1237 | in_reply_to ? "reply" : "transaction", | |
1238 | fd); | |
1239 | ret = -EPERM; | |
1240 | goto err_fd_not_accepted; | |
1241 | } | |
1242 | ||
1243 | file = fget(fd); | |
1244 | if (!file) { | |
1245 | binder_user_error("%d:%d got transaction with invalid fd, %d\n", | |
1246 | proc->pid, thread->pid, fd); | |
1247 | ret = -EBADF; | |
1248 | goto err_fget; | |
1249 | } | |
1250 | ret = security_binder_transfer_file(proc->tsk, target_proc->tsk, file); | |
1251 | if (ret < 0) { | |
1252 | ret = -EPERM; | |
1253 | goto err_security; | |
1254 | } | |
1255 | ||
1256 | target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC); | |
1257 | if (target_fd < 0) { | |
1258 | ret = -ENOMEM; | |
1259 | goto err_get_unused_fd; | |
1260 | } | |
1261 | task_fd_install(target_proc, target_fd, file); | |
1262 | trace_binder_transaction_fd(t, fd, target_fd); | |
1263 | binder_debug(BINDER_DEBUG_TRANSACTION, " fd %d -> %d\n", | |
1264 | fd, target_fd); | |
1265 | ||
1266 | return target_fd; | |
1267 | ||
1268 | err_get_unused_fd: | |
1269 | err_security: | |
1270 | fput(file); | |
1271 | err_fget: | |
1272 | err_fd_not_accepted: | |
1273 | return ret; | |
1274 | } | |
1275 | ||
def95c73 MC |
1276 | static int binder_translate_fd_array(struct binder_fd_array_object *fda, |
1277 | struct binder_buffer_object *parent, | |
1278 | struct binder_transaction *t, | |
1279 | struct binder_thread *thread, | |
1280 | struct binder_transaction *in_reply_to) | |
1281 | { | |
1282 | binder_size_t fdi, fd_buf_size, num_installed_fds; | |
1283 | int target_fd; | |
1284 | uintptr_t parent_buffer; | |
1285 | u32 *fd_array; | |
1286 | struct binder_proc *proc = thread->proc; | |
1287 | struct binder_proc *target_proc = t->to_proc; | |
1288 | ||
1289 | fd_buf_size = sizeof(u32) * fda->num_fds; | |
1290 | if (fda->num_fds >= SIZE_MAX / sizeof(u32)) { | |
1291 | binder_user_error("%d:%d got transaction with invalid number of fds (%lld)\n", | |
1292 | proc->pid, thread->pid, (u64)fda->num_fds); | |
1293 | return -EINVAL; | |
1294 | } | |
1295 | if (fd_buf_size > parent->length || | |
1296 | fda->parent_offset > parent->length - fd_buf_size) { | |
1297 | /* No space for all file descriptors here. */ | |
1298 | binder_user_error("%d:%d not enough space to store %lld fds in buffer\n", | |
1299 | proc->pid, thread->pid, (u64)fda->num_fds); | |
1300 | return -EINVAL; | |
1301 | } | |
1302 | /* | |
1303 | * Since the parent was already fixed up, convert it | |
1304 | * back to the kernel address space to access it | |
1305 | */ | |
19c98724 TK |
1306 | parent_buffer = parent->buffer - |
1307 | binder_alloc_get_user_buffer_offset(&target_proc->alloc); | |
def95c73 MC |
1308 | fd_array = (u32 *)(parent_buffer + fda->parent_offset); |
1309 | if (!IS_ALIGNED((unsigned long)fd_array, sizeof(u32))) { | |
1310 | binder_user_error("%d:%d parent offset not aligned correctly.\n", | |
1311 | proc->pid, thread->pid); | |
1312 | return -EINVAL; | |
1313 | } | |
1314 | for (fdi = 0; fdi < fda->num_fds; fdi++) { | |
1315 | target_fd = binder_translate_fd(fd_array[fdi], t, thread, | |
1316 | in_reply_to); | |
1317 | if (target_fd < 0) | |
1318 | goto err_translate_fd_failed; | |
1319 | fd_array[fdi] = target_fd; | |
1320 | } | |
1321 | return 0; | |
1322 | ||
1323 | err_translate_fd_failed: | |
1324 | /* | |
1325 | * Failed to allocate fd or security error, free fds | |
1326 | * installed so far. | |
1327 | */ | |
1328 | num_installed_fds = fdi; | |
1329 | for (fdi = 0; fdi < num_installed_fds; fdi++) | |
1330 | task_close_fd(target_proc, fd_array[fdi]); | |
1331 | return target_fd; | |
1332 | } | |
1333 | ||
7980240b MC |
1334 | static int binder_fixup_parent(struct binder_transaction *t, |
1335 | struct binder_thread *thread, | |
1336 | struct binder_buffer_object *bp, | |
1337 | binder_size_t *off_start, | |
1338 | binder_size_t num_valid, | |
1339 | struct binder_buffer_object *last_fixup_obj, | |
1340 | binder_size_t last_fixup_min_off) | |
1341 | { | |
1342 | struct binder_buffer_object *parent; | |
1343 | u8 *parent_buffer; | |
1344 | struct binder_buffer *b = t->buffer; | |
1345 | struct binder_proc *proc = thread->proc; | |
1346 | struct binder_proc *target_proc = t->to_proc; | |
1347 | ||
1348 | if (!(bp->flags & BINDER_BUFFER_FLAG_HAS_PARENT)) | |
1349 | return 0; | |
1350 | ||
1351 | parent = binder_validate_ptr(b, bp->parent, off_start, num_valid); | |
1352 | if (!parent) { | |
1353 | binder_user_error("%d:%d got transaction with invalid parent offset or type\n", | |
1354 | proc->pid, thread->pid); | |
1355 | return -EINVAL; | |
1356 | } | |
1357 | ||
1358 | if (!binder_validate_fixup(b, off_start, | |
1359 | parent, bp->parent_offset, | |
1360 | last_fixup_obj, | |
1361 | last_fixup_min_off)) { | |
1362 | binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n", | |
1363 | proc->pid, thread->pid); | |
1364 | return -EINVAL; | |
1365 | } | |
1366 | ||
1367 | if (parent->length < sizeof(binder_uintptr_t) || | |
1368 | bp->parent_offset > parent->length - sizeof(binder_uintptr_t)) { | |
1369 | /* No space for a pointer here! */ | |
1370 | binder_user_error("%d:%d got transaction with invalid parent offset\n", | |
1371 | proc->pid, thread->pid); | |
1372 | return -EINVAL; | |
1373 | } | |
1374 | parent_buffer = (u8 *)(parent->buffer - | |
19c98724 TK |
1375 | binder_alloc_get_user_buffer_offset( |
1376 | &target_proc->alloc)); | |
7980240b MC |
1377 | *(binder_uintptr_t *)(parent_buffer + bp->parent_offset) = bp->buffer; |
1378 | ||
1379 | return 0; | |
1380 | } | |
1381 | ||
355b0502 GKH |
1382 | static void binder_transaction(struct binder_proc *proc, |
1383 | struct binder_thread *thread, | |
4bfac80a MC |
1384 | struct binder_transaction_data *tr, int reply, |
1385 | binder_size_t extra_buffers_size) | |
355b0502 | 1386 | { |
a056af42 | 1387 | int ret; |
355b0502 GKH |
1388 | struct binder_transaction *t; |
1389 | struct binder_work *tcomplete; | |
7980240b | 1390 | binder_size_t *offp, *off_end, *off_start; |
212265e5 | 1391 | binder_size_t off_min; |
7980240b | 1392 | u8 *sg_bufp, *sg_buf_end; |
355b0502 GKH |
1393 | struct binder_proc *target_proc; |
1394 | struct binder_thread *target_thread = NULL; | |
1395 | struct binder_node *target_node = NULL; | |
1396 | struct list_head *target_list; | |
1397 | wait_queue_head_t *target_wait; | |
1398 | struct binder_transaction *in_reply_to = NULL; | |
1399 | struct binder_transaction_log_entry *e; | |
1400 | uint32_t return_error; | |
7980240b MC |
1401 | struct binder_buffer_object *last_fixup_obj = NULL; |
1402 | binder_size_t last_fixup_min_off = 0; | |
342e5c90 | 1403 | struct binder_context *context = proc->context; |
355b0502 GKH |
1404 | |
1405 | e = binder_transaction_log_add(&binder_transaction_log); | |
1406 | e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY); | |
1407 | e->from_proc = proc->pid; | |
1408 | e->from_thread = thread->pid; | |
1409 | e->target_handle = tr->target.handle; | |
1410 | e->data_size = tr->data_size; | |
1411 | e->offsets_size = tr->offsets_size; | |
14db3181 | 1412 | e->context_name = proc->context->name; |
355b0502 GKH |
1413 | |
1414 | if (reply) { | |
1415 | in_reply_to = thread->transaction_stack; | |
1416 | if (in_reply_to == NULL) { | |
56b468fc | 1417 | binder_user_error("%d:%d got reply transaction with no transaction stack\n", |
355b0502 GKH |
1418 | proc->pid, thread->pid); |
1419 | return_error = BR_FAILED_REPLY; | |
1420 | goto err_empty_call_stack; | |
1421 | } | |
1422 | binder_set_nice(in_reply_to->saved_priority); | |
1423 | if (in_reply_to->to_thread != thread) { | |
56b468fc | 1424 | binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n", |
355b0502 GKH |
1425 | proc->pid, thread->pid, in_reply_to->debug_id, |
1426 | in_reply_to->to_proc ? | |
1427 | in_reply_to->to_proc->pid : 0, | |
1428 | in_reply_to->to_thread ? | |
1429 | in_reply_to->to_thread->pid : 0); | |
1430 | return_error = BR_FAILED_REPLY; | |
1431 | in_reply_to = NULL; | |
1432 | goto err_bad_call_stack; | |
1433 | } | |
1434 | thread->transaction_stack = in_reply_to->to_parent; | |
1435 | target_thread = in_reply_to->from; | |
1436 | if (target_thread == NULL) { | |
1437 | return_error = BR_DEAD_REPLY; | |
1438 | goto err_dead_binder; | |
1439 | } | |
1440 | if (target_thread->transaction_stack != in_reply_to) { | |
56b468fc | 1441 | binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n", |
355b0502 GKH |
1442 | proc->pid, thread->pid, |
1443 | target_thread->transaction_stack ? | |
1444 | target_thread->transaction_stack->debug_id : 0, | |
1445 | in_reply_to->debug_id); | |
1446 | return_error = BR_FAILED_REPLY; | |
1447 | in_reply_to = NULL; | |
1448 | target_thread = NULL; | |
1449 | goto err_dead_binder; | |
1450 | } | |
1451 | target_proc = target_thread->proc; | |
1452 | } else { | |
1453 | if (tr->target.handle) { | |
1454 | struct binder_ref *ref; | |
10f62861 | 1455 | |
0a3ffab9 | 1456 | ref = binder_get_ref(proc, tr->target.handle, true); |
355b0502 | 1457 | if (ref == NULL) { |
56b468fc | 1458 | binder_user_error("%d:%d got transaction to invalid handle\n", |
355b0502 GKH |
1459 | proc->pid, thread->pid); |
1460 | return_error = BR_FAILED_REPLY; | |
1461 | goto err_invalid_target_handle; | |
1462 | } | |
1463 | target_node = ref->node; | |
1464 | } else { | |
c44b1231 | 1465 | mutex_lock(&context->context_mgr_node_lock); |
342e5c90 | 1466 | target_node = context->binder_context_mgr_node; |
355b0502 GKH |
1467 | if (target_node == NULL) { |
1468 | return_error = BR_DEAD_REPLY; | |
c44b1231 | 1469 | mutex_unlock(&context->context_mgr_node_lock); |
355b0502 GKH |
1470 | goto err_no_context_mgr_node; |
1471 | } | |
c44b1231 | 1472 | mutex_unlock(&context->context_mgr_node_lock); |
355b0502 GKH |
1473 | } |
1474 | e->to_node = target_node->debug_id; | |
1475 | target_proc = target_node->proc; | |
1476 | if (target_proc == NULL) { | |
1477 | return_error = BR_DEAD_REPLY; | |
1478 | goto err_dead_binder; | |
1479 | } | |
79af7307 SS |
1480 | if (security_binder_transaction(proc->tsk, |
1481 | target_proc->tsk) < 0) { | |
1482 | return_error = BR_FAILED_REPLY; | |
1483 | goto err_invalid_target_handle; | |
1484 | } | |
355b0502 GKH |
1485 | if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) { |
1486 | struct binder_transaction *tmp; | |
10f62861 | 1487 | |
355b0502 GKH |
1488 | tmp = thread->transaction_stack; |
1489 | if (tmp->to_thread != thread) { | |
56b468fc | 1490 | binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n", |
355b0502 GKH |
1491 | proc->pid, thread->pid, tmp->debug_id, |
1492 | tmp->to_proc ? tmp->to_proc->pid : 0, | |
1493 | tmp->to_thread ? | |
1494 | tmp->to_thread->pid : 0); | |
1495 | return_error = BR_FAILED_REPLY; | |
1496 | goto err_bad_call_stack; | |
1497 | } | |
1498 | while (tmp) { | |
1499 | if (tmp->from && tmp->from->proc == target_proc) | |
1500 | target_thread = tmp->from; | |
1501 | tmp = tmp->from_parent; | |
1502 | } | |
1503 | } | |
1504 | } | |
1505 | if (target_thread) { | |
1506 | e->to_thread = target_thread->pid; | |
1507 | target_list = &target_thread->todo; | |
1508 | target_wait = &target_thread->wait; | |
1509 | } else { | |
1510 | target_list = &target_proc->todo; | |
1511 | target_wait = &target_proc->wait; | |
1512 | } | |
1513 | e->to_proc = target_proc->pid; | |
1514 | ||
1515 | /* TODO: reuse incoming transaction for reply */ | |
1516 | t = kzalloc(sizeof(*t), GFP_KERNEL); | |
1517 | if (t == NULL) { | |
1518 | return_error = BR_FAILED_REPLY; | |
1519 | goto err_alloc_t_failed; | |
1520 | } | |
1521 | binder_stats_created(BINDER_STAT_TRANSACTION); | |
1522 | ||
1523 | tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL); | |
1524 | if (tcomplete == NULL) { | |
1525 | return_error = BR_FAILED_REPLY; | |
1526 | goto err_alloc_tcomplete_failed; | |
1527 | } | |
1528 | binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE); | |
1529 | ||
1530 | t->debug_id = ++binder_last_id; | |
1531 | e->debug_id = t->debug_id; | |
1532 | ||
1533 | if (reply) | |
1534 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
4bfac80a | 1535 | "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld-%lld\n", |
355b0502 GKH |
1536 | proc->pid, thread->pid, t->debug_id, |
1537 | target_proc->pid, target_thread->pid, | |
da49889d AH |
1538 | (u64)tr->data.ptr.buffer, |
1539 | (u64)tr->data.ptr.offsets, | |
4bfac80a MC |
1540 | (u64)tr->data_size, (u64)tr->offsets_size, |
1541 | (u64)extra_buffers_size); | |
355b0502 GKH |
1542 | else |
1543 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
4bfac80a | 1544 | "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld-%lld\n", |
355b0502 GKH |
1545 | proc->pid, thread->pid, t->debug_id, |
1546 | target_proc->pid, target_node->debug_id, | |
da49889d AH |
1547 | (u64)tr->data.ptr.buffer, |
1548 | (u64)tr->data.ptr.offsets, | |
4bfac80a MC |
1549 | (u64)tr->data_size, (u64)tr->offsets_size, |
1550 | (u64)extra_buffers_size); | |
355b0502 GKH |
1551 | |
1552 | if (!reply && !(tr->flags & TF_ONE_WAY)) | |
1553 | t->from = thread; | |
1554 | else | |
1555 | t->from = NULL; | |
57bab7cb | 1556 | t->sender_euid = task_euid(proc->tsk); |
355b0502 GKH |
1557 | t->to_proc = target_proc; |
1558 | t->to_thread = target_thread; | |
1559 | t->code = tr->code; | |
1560 | t->flags = tr->flags; | |
1561 | t->priority = task_nice(current); | |
975a1ac9 AH |
1562 | |
1563 | trace_binder_transaction(reply, t, target_node); | |
1564 | ||
19c98724 | 1565 | t->buffer = binder_alloc_new_buf(&target_proc->alloc, tr->data_size, |
4bfac80a MC |
1566 | tr->offsets_size, extra_buffers_size, |
1567 | !reply && (t->flags & TF_ONE_WAY)); | |
355b0502 GKH |
1568 | if (t->buffer == NULL) { |
1569 | return_error = BR_FAILED_REPLY; | |
1570 | goto err_binder_alloc_buf_failed; | |
1571 | } | |
1572 | t->buffer->allow_user_free = 0; | |
1573 | t->buffer->debug_id = t->debug_id; | |
1574 | t->buffer->transaction = t; | |
1575 | t->buffer->target_node = target_node; | |
975a1ac9 | 1576 | trace_binder_transaction_alloc_buf(t->buffer); |
355b0502 GKH |
1577 | if (target_node) |
1578 | binder_inc_node(target_node, 1, 0, NULL); | |
1579 | ||
7980240b MC |
1580 | off_start = (binder_size_t *)(t->buffer->data + |
1581 | ALIGN(tr->data_size, sizeof(void *))); | |
1582 | offp = off_start; | |
355b0502 | 1583 | |
da49889d AH |
1584 | if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t) |
1585 | tr->data.ptr.buffer, tr->data_size)) { | |
56b468fc AS |
1586 | binder_user_error("%d:%d got transaction with invalid data ptr\n", |
1587 | proc->pid, thread->pid); | |
355b0502 GKH |
1588 | return_error = BR_FAILED_REPLY; |
1589 | goto err_copy_data_failed; | |
1590 | } | |
da49889d AH |
1591 | if (copy_from_user(offp, (const void __user *)(uintptr_t) |
1592 | tr->data.ptr.offsets, tr->offsets_size)) { | |
56b468fc AS |
1593 | binder_user_error("%d:%d got transaction with invalid offsets ptr\n", |
1594 | proc->pid, thread->pid); | |
355b0502 GKH |
1595 | return_error = BR_FAILED_REPLY; |
1596 | goto err_copy_data_failed; | |
1597 | } | |
da49889d AH |
1598 | if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) { |
1599 | binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n", | |
1600 | proc->pid, thread->pid, (u64)tr->offsets_size); | |
355b0502 GKH |
1601 | return_error = BR_FAILED_REPLY; |
1602 | goto err_bad_offset; | |
1603 | } | |
7980240b MC |
1604 | if (!IS_ALIGNED(extra_buffers_size, sizeof(u64))) { |
1605 | binder_user_error("%d:%d got transaction with unaligned buffers size, %lld\n", | |
1606 | proc->pid, thread->pid, | |
1607 | (u64)extra_buffers_size); | |
1608 | return_error = BR_FAILED_REPLY; | |
1609 | goto err_bad_offset; | |
1610 | } | |
1611 | off_end = (void *)off_start + tr->offsets_size; | |
1612 | sg_bufp = (u8 *)(PTR_ALIGN(off_end, sizeof(void *))); | |
1613 | sg_buf_end = sg_bufp + extra_buffers_size; | |
212265e5 | 1614 | off_min = 0; |
355b0502 | 1615 | for (; offp < off_end; offp++) { |
feba3900 MC |
1616 | struct binder_object_header *hdr; |
1617 | size_t object_size = binder_validate_object(t->buffer, *offp); | |
10f62861 | 1618 | |
feba3900 MC |
1619 | if (object_size == 0 || *offp < off_min) { |
1620 | binder_user_error("%d:%d got transaction with invalid offset (%lld, min %lld max %lld) or object.\n", | |
212265e5 AH |
1621 | proc->pid, thread->pid, (u64)*offp, |
1622 | (u64)off_min, | |
feba3900 | 1623 | (u64)t->buffer->data_size); |
355b0502 GKH |
1624 | return_error = BR_FAILED_REPLY; |
1625 | goto err_bad_offset; | |
1626 | } | |
feba3900 MC |
1627 | |
1628 | hdr = (struct binder_object_header *)(t->buffer->data + *offp); | |
1629 | off_min = *offp + object_size; | |
1630 | switch (hdr->type) { | |
355b0502 GKH |
1631 | case BINDER_TYPE_BINDER: |
1632 | case BINDER_TYPE_WEAK_BINDER: { | |
feba3900 | 1633 | struct flat_binder_object *fp; |
10f62861 | 1634 | |
feba3900 | 1635 | fp = to_flat_binder_object(hdr); |
a056af42 MC |
1636 | ret = binder_translate_binder(fp, t, thread); |
1637 | if (ret < 0) { | |
355b0502 | 1638 | return_error = BR_FAILED_REPLY; |
a056af42 | 1639 | goto err_translate_failed; |
355b0502 | 1640 | } |
355b0502 GKH |
1641 | } break; |
1642 | case BINDER_TYPE_HANDLE: | |
1643 | case BINDER_TYPE_WEAK_HANDLE: { | |
feba3900 | 1644 | struct flat_binder_object *fp; |
0a3ffab9 | 1645 | |
feba3900 | 1646 | fp = to_flat_binder_object(hdr); |
a056af42 MC |
1647 | ret = binder_translate_handle(fp, t, thread); |
1648 | if (ret < 0) { | |
79af7307 | 1649 | return_error = BR_FAILED_REPLY; |
a056af42 | 1650 | goto err_translate_failed; |
355b0502 GKH |
1651 | } |
1652 | } break; | |
1653 | ||
1654 | case BINDER_TYPE_FD: { | |
feba3900 | 1655 | struct binder_fd_object *fp = to_binder_fd_object(hdr); |
a056af42 MC |
1656 | int target_fd = binder_translate_fd(fp->fd, t, thread, |
1657 | in_reply_to); | |
355b0502 | 1658 | |
355b0502 | 1659 | if (target_fd < 0) { |
355b0502 | 1660 | return_error = BR_FAILED_REPLY; |
a056af42 | 1661 | goto err_translate_failed; |
355b0502 | 1662 | } |
feba3900 MC |
1663 | fp->pad_binder = 0; |
1664 | fp->fd = target_fd; | |
355b0502 | 1665 | } break; |
def95c73 MC |
1666 | case BINDER_TYPE_FDA: { |
1667 | struct binder_fd_array_object *fda = | |
1668 | to_binder_fd_array_object(hdr); | |
1669 | struct binder_buffer_object *parent = | |
1670 | binder_validate_ptr(t->buffer, fda->parent, | |
1671 | off_start, | |
1672 | offp - off_start); | |
1673 | if (!parent) { | |
1674 | binder_user_error("%d:%d got transaction with invalid parent offset or type\n", | |
1675 | proc->pid, thread->pid); | |
1676 | return_error = BR_FAILED_REPLY; | |
1677 | goto err_bad_parent; | |
1678 | } | |
1679 | if (!binder_validate_fixup(t->buffer, off_start, | |
1680 | parent, fda->parent_offset, | |
1681 | last_fixup_obj, | |
1682 | last_fixup_min_off)) { | |
1683 | binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n", | |
1684 | proc->pid, thread->pid); | |
1685 | return_error = BR_FAILED_REPLY; | |
1686 | goto err_bad_parent; | |
1687 | } | |
1688 | ret = binder_translate_fd_array(fda, parent, t, thread, | |
1689 | in_reply_to); | |
1690 | if (ret < 0) { | |
1691 | return_error = BR_FAILED_REPLY; | |
1692 | goto err_translate_failed; | |
1693 | } | |
1694 | last_fixup_obj = parent; | |
1695 | last_fixup_min_off = | |
1696 | fda->parent_offset + sizeof(u32) * fda->num_fds; | |
1697 | } break; | |
7980240b MC |
1698 | case BINDER_TYPE_PTR: { |
1699 | struct binder_buffer_object *bp = | |
1700 | to_binder_buffer_object(hdr); | |
1701 | size_t buf_left = sg_buf_end - sg_bufp; | |
1702 | ||
1703 | if (bp->length > buf_left) { | |
1704 | binder_user_error("%d:%d got transaction with too large buffer\n", | |
1705 | proc->pid, thread->pid); | |
1706 | return_error = BR_FAILED_REPLY; | |
1707 | goto err_bad_offset; | |
1708 | } | |
1709 | if (copy_from_user(sg_bufp, | |
1710 | (const void __user *)(uintptr_t) | |
1711 | bp->buffer, bp->length)) { | |
1712 | binder_user_error("%d:%d got transaction with invalid offsets ptr\n", | |
1713 | proc->pid, thread->pid); | |
1714 | return_error = BR_FAILED_REPLY; | |
1715 | goto err_copy_data_failed; | |
1716 | } | |
1717 | /* Fixup buffer pointer to target proc address space */ | |
1718 | bp->buffer = (uintptr_t)sg_bufp + | |
19c98724 TK |
1719 | binder_alloc_get_user_buffer_offset( |
1720 | &target_proc->alloc); | |
7980240b MC |
1721 | sg_bufp += ALIGN(bp->length, sizeof(u64)); |
1722 | ||
1723 | ret = binder_fixup_parent(t, thread, bp, off_start, | |
1724 | offp - off_start, | |
1725 | last_fixup_obj, | |
1726 | last_fixup_min_off); | |
1727 | if (ret < 0) { | |
1728 | return_error = BR_FAILED_REPLY; | |
1729 | goto err_translate_failed; | |
1730 | } | |
1731 | last_fixup_obj = bp; | |
1732 | last_fixup_min_off = 0; | |
1733 | } break; | |
355b0502 | 1734 | default: |
64dcfe6b | 1735 | binder_user_error("%d:%d got transaction with invalid object type, %x\n", |
feba3900 | 1736 | proc->pid, thread->pid, hdr->type); |
355b0502 GKH |
1737 | return_error = BR_FAILED_REPLY; |
1738 | goto err_bad_object_type; | |
1739 | } | |
1740 | } | |
1741 | if (reply) { | |
1742 | BUG_ON(t->buffer->async_transaction != 0); | |
1743 | binder_pop_transaction(target_thread, in_reply_to); | |
1744 | } else if (!(t->flags & TF_ONE_WAY)) { | |
1745 | BUG_ON(t->buffer->async_transaction != 0); | |
1746 | t->need_reply = 1; | |
1747 | t->from_parent = thread->transaction_stack; | |
1748 | thread->transaction_stack = t; | |
1749 | } else { | |
1750 | BUG_ON(target_node == NULL); | |
1751 | BUG_ON(t->buffer->async_transaction != 1); | |
1752 | if (target_node->has_async_transaction) { | |
1753 | target_list = &target_node->async_todo; | |
1754 | target_wait = NULL; | |
1755 | } else | |
1756 | target_node->has_async_transaction = 1; | |
1757 | } | |
1758 | t->work.type = BINDER_WORK_TRANSACTION; | |
1759 | list_add_tail(&t->work.entry, target_list); | |
1760 | tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE; | |
1761 | list_add_tail(&tcomplete->entry, &thread->todo); | |
00b40d61 RA |
1762 | if (target_wait) { |
1763 | if (reply || !(t->flags & TF_ONE_WAY)) | |
1764 | wake_up_interruptible_sync(target_wait); | |
1765 | else | |
1766 | wake_up_interruptible(target_wait); | |
1767 | } | |
355b0502 GKH |
1768 | return; |
1769 | ||
a056af42 | 1770 | err_translate_failed: |
355b0502 GKH |
1771 | err_bad_object_type: |
1772 | err_bad_offset: | |
def95c73 | 1773 | err_bad_parent: |
355b0502 | 1774 | err_copy_data_failed: |
975a1ac9 | 1775 | trace_binder_transaction_failed_buffer_release(t->buffer); |
355b0502 GKH |
1776 | binder_transaction_buffer_release(target_proc, t->buffer, offp); |
1777 | t->buffer->transaction = NULL; | |
19c98724 | 1778 | binder_alloc_free_buf(&target_proc->alloc, t->buffer); |
355b0502 GKH |
1779 | err_binder_alloc_buf_failed: |
1780 | kfree(tcomplete); | |
1781 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); | |
1782 | err_alloc_tcomplete_failed: | |
1783 | kfree(t); | |
1784 | binder_stats_deleted(BINDER_STAT_TRANSACTION); | |
1785 | err_alloc_t_failed: | |
1786 | err_bad_call_stack: | |
1787 | err_empty_call_stack: | |
1788 | err_dead_binder: | |
1789 | err_invalid_target_handle: | |
1790 | err_no_context_mgr_node: | |
1791 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, | |
da49889d | 1792 | "%d:%d transaction failed %d, size %lld-%lld\n", |
355b0502 | 1793 | proc->pid, thread->pid, return_error, |
da49889d | 1794 | (u64)tr->data_size, (u64)tr->offsets_size); |
355b0502 GKH |
1795 | |
1796 | { | |
1797 | struct binder_transaction_log_entry *fe; | |
10f62861 | 1798 | |
355b0502 GKH |
1799 | fe = binder_transaction_log_add(&binder_transaction_log_failed); |
1800 | *fe = *e; | |
1801 | } | |
1802 | ||
1803 | BUG_ON(thread->return_error != BR_OK); | |
1804 | if (in_reply_to) { | |
1805 | thread->return_error = BR_TRANSACTION_COMPLETE; | |
1806 | binder_send_failed_reply(in_reply_to, return_error); | |
1807 | } else | |
1808 | thread->return_error = return_error; | |
1809 | } | |
1810 | ||
fb07ebc3 BP |
1811 | static int binder_thread_write(struct binder_proc *proc, |
1812 | struct binder_thread *thread, | |
da49889d AH |
1813 | binder_uintptr_t binder_buffer, size_t size, |
1814 | binder_size_t *consumed) | |
355b0502 GKH |
1815 | { |
1816 | uint32_t cmd; | |
342e5c90 | 1817 | struct binder_context *context = proc->context; |
da49889d | 1818 | void __user *buffer = (void __user *)(uintptr_t)binder_buffer; |
355b0502 GKH |
1819 | void __user *ptr = buffer + *consumed; |
1820 | void __user *end = buffer + size; | |
1821 | ||
1822 | while (ptr < end && thread->return_error == BR_OK) { | |
1823 | if (get_user(cmd, (uint32_t __user *)ptr)) | |
1824 | return -EFAULT; | |
1825 | ptr += sizeof(uint32_t); | |
975a1ac9 | 1826 | trace_binder_command(cmd); |
355b0502 | 1827 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) { |
0953c797 BJS |
1828 | atomic_inc(&binder_stats.bc[_IOC_NR(cmd)]); |
1829 | atomic_inc(&proc->stats.bc[_IOC_NR(cmd)]); | |
1830 | atomic_inc(&thread->stats.bc[_IOC_NR(cmd)]); | |
355b0502 GKH |
1831 | } |
1832 | switch (cmd) { | |
1833 | case BC_INCREFS: | |
1834 | case BC_ACQUIRE: | |
1835 | case BC_RELEASE: | |
1836 | case BC_DECREFS: { | |
1837 | uint32_t target; | |
c44b1231 | 1838 | struct binder_ref *ref = NULL; |
355b0502 GKH |
1839 | const char *debug_string; |
1840 | ||
1841 | if (get_user(target, (uint32_t __user *)ptr)) | |
1842 | return -EFAULT; | |
c44b1231 | 1843 | |
355b0502 | 1844 | ptr += sizeof(uint32_t); |
c44b1231 | 1845 | if (target == 0 && |
355b0502 | 1846 | (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) { |
c44b1231 TK |
1847 | struct binder_node *ctx_mgr_node; |
1848 | ||
1849 | mutex_lock(&context->context_mgr_node_lock); | |
1850 | ctx_mgr_node = context->binder_context_mgr_node; | |
1851 | if (ctx_mgr_node) { | |
1852 | ref = binder_get_ref_for_node(proc, | |
1853 | ctx_mgr_node); | |
1854 | if (ref && ref->desc != target) { | |
1855 | binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n", | |
1856 | proc->pid, thread->pid, | |
1857 | ref->desc); | |
1858 | } | |
355b0502 | 1859 | } |
c44b1231 TK |
1860 | mutex_unlock(&context->context_mgr_node_lock); |
1861 | } | |
1862 | if (ref == NULL) | |
0a3ffab9 AH |
1863 | ref = binder_get_ref(proc, target, |
1864 | cmd == BC_ACQUIRE || | |
1865 | cmd == BC_RELEASE); | |
355b0502 | 1866 | if (ref == NULL) { |
56b468fc | 1867 | binder_user_error("%d:%d refcount change on invalid ref %d\n", |
355b0502 GKH |
1868 | proc->pid, thread->pid, target); |
1869 | break; | |
1870 | } | |
1871 | switch (cmd) { | |
1872 | case BC_INCREFS: | |
1873 | debug_string = "IncRefs"; | |
1874 | binder_inc_ref(ref, 0, NULL); | |
1875 | break; | |
1876 | case BC_ACQUIRE: | |
1877 | debug_string = "Acquire"; | |
1878 | binder_inc_ref(ref, 1, NULL); | |
1879 | break; | |
1880 | case BC_RELEASE: | |
1881 | debug_string = "Release"; | |
1882 | binder_dec_ref(ref, 1); | |
1883 | break; | |
1884 | case BC_DECREFS: | |
1885 | default: | |
1886 | debug_string = "DecRefs"; | |
1887 | binder_dec_ref(ref, 0); | |
1888 | break; | |
1889 | } | |
1890 | binder_debug(BINDER_DEBUG_USER_REFS, | |
56b468fc | 1891 | "%d:%d %s ref %d desc %d s %d w %d for node %d\n", |
355b0502 GKH |
1892 | proc->pid, thread->pid, debug_string, ref->debug_id, |
1893 | ref->desc, ref->strong, ref->weak, ref->node->debug_id); | |
1894 | break; | |
1895 | } | |
1896 | case BC_INCREFS_DONE: | |
1897 | case BC_ACQUIRE_DONE: { | |
da49889d AH |
1898 | binder_uintptr_t node_ptr; |
1899 | binder_uintptr_t cookie; | |
355b0502 GKH |
1900 | struct binder_node *node; |
1901 | ||
da49889d | 1902 | if (get_user(node_ptr, (binder_uintptr_t __user *)ptr)) |
355b0502 | 1903 | return -EFAULT; |
da49889d AH |
1904 | ptr += sizeof(binder_uintptr_t); |
1905 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) | |
355b0502 | 1906 | return -EFAULT; |
da49889d | 1907 | ptr += sizeof(binder_uintptr_t); |
355b0502 GKH |
1908 | node = binder_get_node(proc, node_ptr); |
1909 | if (node == NULL) { | |
da49889d | 1910 | binder_user_error("%d:%d %s u%016llx no match\n", |
355b0502 GKH |
1911 | proc->pid, thread->pid, |
1912 | cmd == BC_INCREFS_DONE ? | |
1913 | "BC_INCREFS_DONE" : | |
1914 | "BC_ACQUIRE_DONE", | |
da49889d | 1915 | (u64)node_ptr); |
355b0502 GKH |
1916 | break; |
1917 | } | |
1918 | if (cookie != node->cookie) { | |
da49889d | 1919 | binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n", |
355b0502 GKH |
1920 | proc->pid, thread->pid, |
1921 | cmd == BC_INCREFS_DONE ? | |
1922 | "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", | |
da49889d AH |
1923 | (u64)node_ptr, node->debug_id, |
1924 | (u64)cookie, (u64)node->cookie); | |
355b0502 GKH |
1925 | break; |
1926 | } | |
1927 | if (cmd == BC_ACQUIRE_DONE) { | |
1928 | if (node->pending_strong_ref == 0) { | |
56b468fc | 1929 | binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n", |
355b0502 GKH |
1930 | proc->pid, thread->pid, |
1931 | node->debug_id); | |
1932 | break; | |
1933 | } | |
1934 | node->pending_strong_ref = 0; | |
1935 | } else { | |
1936 | if (node->pending_weak_ref == 0) { | |
56b468fc | 1937 | binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n", |
355b0502 GKH |
1938 | proc->pid, thread->pid, |
1939 | node->debug_id); | |
1940 | break; | |
1941 | } | |
1942 | node->pending_weak_ref = 0; | |
1943 | } | |
1944 | binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0); | |
1945 | binder_debug(BINDER_DEBUG_USER_REFS, | |
56b468fc | 1946 | "%d:%d %s node %d ls %d lw %d\n", |
355b0502 GKH |
1947 | proc->pid, thread->pid, |
1948 | cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", | |
1949 | node->debug_id, node->local_strong_refs, node->local_weak_refs); | |
1950 | break; | |
1951 | } | |
1952 | case BC_ATTEMPT_ACQUIRE: | |
56b468fc | 1953 | pr_err("BC_ATTEMPT_ACQUIRE not supported\n"); |
355b0502 GKH |
1954 | return -EINVAL; |
1955 | case BC_ACQUIRE_RESULT: | |
56b468fc | 1956 | pr_err("BC_ACQUIRE_RESULT not supported\n"); |
355b0502 GKH |
1957 | return -EINVAL; |
1958 | ||
1959 | case BC_FREE_BUFFER: { | |
da49889d | 1960 | binder_uintptr_t data_ptr; |
355b0502 GKH |
1961 | struct binder_buffer *buffer; |
1962 | ||
da49889d | 1963 | if (get_user(data_ptr, (binder_uintptr_t __user *)ptr)) |
355b0502 | 1964 | return -EFAULT; |
da49889d | 1965 | ptr += sizeof(binder_uintptr_t); |
355b0502 | 1966 | |
19c98724 TK |
1967 | buffer = binder_alloc_buffer_lookup(&proc->alloc, |
1968 | data_ptr); | |
355b0502 | 1969 | if (buffer == NULL) { |
da49889d AH |
1970 | binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n", |
1971 | proc->pid, thread->pid, (u64)data_ptr); | |
355b0502 GKH |
1972 | break; |
1973 | } | |
1974 | if (!buffer->allow_user_free) { | |
da49889d AH |
1975 | binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n", |
1976 | proc->pid, thread->pid, (u64)data_ptr); | |
355b0502 GKH |
1977 | break; |
1978 | } | |
1979 | binder_debug(BINDER_DEBUG_FREE_BUFFER, | |
da49889d AH |
1980 | "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n", |
1981 | proc->pid, thread->pid, (u64)data_ptr, | |
1982 | buffer->debug_id, | |
355b0502 GKH |
1983 | buffer->transaction ? "active" : "finished"); |
1984 | ||
1985 | if (buffer->transaction) { | |
1986 | buffer->transaction->buffer = NULL; | |
1987 | buffer->transaction = NULL; | |
1988 | } | |
1989 | if (buffer->async_transaction && buffer->target_node) { | |
1990 | BUG_ON(!buffer->target_node->has_async_transaction); | |
1991 | if (list_empty(&buffer->target_node->async_todo)) | |
1992 | buffer->target_node->has_async_transaction = 0; | |
1993 | else | |
1994 | list_move_tail(buffer->target_node->async_todo.next, &thread->todo); | |
1995 | } | |
975a1ac9 | 1996 | trace_binder_transaction_buffer_release(buffer); |
355b0502 | 1997 | binder_transaction_buffer_release(proc, buffer, NULL); |
19c98724 | 1998 | binder_alloc_free_buf(&proc->alloc, buffer); |
355b0502 GKH |
1999 | break; |
2000 | } | |
2001 | ||
7980240b MC |
2002 | case BC_TRANSACTION_SG: |
2003 | case BC_REPLY_SG: { | |
2004 | struct binder_transaction_data_sg tr; | |
2005 | ||
2006 | if (copy_from_user(&tr, ptr, sizeof(tr))) | |
2007 | return -EFAULT; | |
2008 | ptr += sizeof(tr); | |
2009 | binder_transaction(proc, thread, &tr.transaction_data, | |
2010 | cmd == BC_REPLY_SG, tr.buffers_size); | |
2011 | break; | |
2012 | } | |
355b0502 GKH |
2013 | case BC_TRANSACTION: |
2014 | case BC_REPLY: { | |
2015 | struct binder_transaction_data tr; | |
2016 | ||
2017 | if (copy_from_user(&tr, ptr, sizeof(tr))) | |
2018 | return -EFAULT; | |
2019 | ptr += sizeof(tr); | |
4bfac80a MC |
2020 | binder_transaction(proc, thread, &tr, |
2021 | cmd == BC_REPLY, 0); | |
355b0502 GKH |
2022 | break; |
2023 | } | |
2024 | ||
2025 | case BC_REGISTER_LOOPER: | |
2026 | binder_debug(BINDER_DEBUG_THREADS, | |
56b468fc | 2027 | "%d:%d BC_REGISTER_LOOPER\n", |
355b0502 GKH |
2028 | proc->pid, thread->pid); |
2029 | if (thread->looper & BINDER_LOOPER_STATE_ENTERED) { | |
2030 | thread->looper |= BINDER_LOOPER_STATE_INVALID; | |
56b468fc | 2031 | binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n", |
355b0502 GKH |
2032 | proc->pid, thread->pid); |
2033 | } else if (proc->requested_threads == 0) { | |
2034 | thread->looper |= BINDER_LOOPER_STATE_INVALID; | |
56b468fc | 2035 | binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n", |
355b0502 GKH |
2036 | proc->pid, thread->pid); |
2037 | } else { | |
2038 | proc->requested_threads--; | |
2039 | proc->requested_threads_started++; | |
2040 | } | |
2041 | thread->looper |= BINDER_LOOPER_STATE_REGISTERED; | |
2042 | break; | |
2043 | case BC_ENTER_LOOPER: | |
2044 | binder_debug(BINDER_DEBUG_THREADS, | |
56b468fc | 2045 | "%d:%d BC_ENTER_LOOPER\n", |
355b0502 GKH |
2046 | proc->pid, thread->pid); |
2047 | if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) { | |
2048 | thread->looper |= BINDER_LOOPER_STATE_INVALID; | |
56b468fc | 2049 | binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n", |
355b0502 GKH |
2050 | proc->pid, thread->pid); |
2051 | } | |
2052 | thread->looper |= BINDER_LOOPER_STATE_ENTERED; | |
2053 | break; | |
2054 | case BC_EXIT_LOOPER: | |
2055 | binder_debug(BINDER_DEBUG_THREADS, | |
56b468fc | 2056 | "%d:%d BC_EXIT_LOOPER\n", |
355b0502 GKH |
2057 | proc->pid, thread->pid); |
2058 | thread->looper |= BINDER_LOOPER_STATE_EXITED; | |
2059 | break; | |
2060 | ||
2061 | case BC_REQUEST_DEATH_NOTIFICATION: | |
2062 | case BC_CLEAR_DEATH_NOTIFICATION: { | |
2063 | uint32_t target; | |
da49889d | 2064 | binder_uintptr_t cookie; |
355b0502 GKH |
2065 | struct binder_ref *ref; |
2066 | struct binder_ref_death *death; | |
2067 | ||
2068 | if (get_user(target, (uint32_t __user *)ptr)) | |
2069 | return -EFAULT; | |
2070 | ptr += sizeof(uint32_t); | |
da49889d | 2071 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) |
355b0502 | 2072 | return -EFAULT; |
da49889d | 2073 | ptr += sizeof(binder_uintptr_t); |
0a3ffab9 | 2074 | ref = binder_get_ref(proc, target, false); |
355b0502 | 2075 | if (ref == NULL) { |
56b468fc | 2076 | binder_user_error("%d:%d %s invalid ref %d\n", |
355b0502 GKH |
2077 | proc->pid, thread->pid, |
2078 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? | |
2079 | "BC_REQUEST_DEATH_NOTIFICATION" : | |
2080 | "BC_CLEAR_DEATH_NOTIFICATION", | |
2081 | target); | |
2082 | break; | |
2083 | } | |
2084 | ||
2085 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, | |
da49889d | 2086 | "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n", |
355b0502 GKH |
2087 | proc->pid, thread->pid, |
2088 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? | |
2089 | "BC_REQUEST_DEATH_NOTIFICATION" : | |
2090 | "BC_CLEAR_DEATH_NOTIFICATION", | |
da49889d | 2091 | (u64)cookie, ref->debug_id, ref->desc, |
355b0502 GKH |
2092 | ref->strong, ref->weak, ref->node->debug_id); |
2093 | ||
2094 | if (cmd == BC_REQUEST_DEATH_NOTIFICATION) { | |
2095 | if (ref->death) { | |
56b468fc | 2096 | binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n", |
355b0502 GKH |
2097 | proc->pid, thread->pid); |
2098 | break; | |
2099 | } | |
2100 | death = kzalloc(sizeof(*death), GFP_KERNEL); | |
2101 | if (death == NULL) { | |
2102 | thread->return_error = BR_ERROR; | |
2103 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, | |
56b468fc | 2104 | "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n", |
355b0502 GKH |
2105 | proc->pid, thread->pid); |
2106 | break; | |
2107 | } | |
2108 | binder_stats_created(BINDER_STAT_DEATH); | |
2109 | INIT_LIST_HEAD(&death->work.entry); | |
2110 | death->cookie = cookie; | |
2111 | ref->death = death; | |
2112 | if (ref->node->proc == NULL) { | |
2113 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; | |
2114 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { | |
2115 | list_add_tail(&ref->death->work.entry, &thread->todo); | |
2116 | } else { | |
2117 | list_add_tail(&ref->death->work.entry, &proc->todo); | |
2118 | wake_up_interruptible(&proc->wait); | |
2119 | } | |
2120 | } | |
2121 | } else { | |
2122 | if (ref->death == NULL) { | |
56b468fc | 2123 | binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n", |
355b0502 GKH |
2124 | proc->pid, thread->pid); |
2125 | break; | |
2126 | } | |
2127 | death = ref->death; | |
2128 | if (death->cookie != cookie) { | |
da49889d | 2129 | binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n", |
355b0502 | 2130 | proc->pid, thread->pid, |
da49889d AH |
2131 | (u64)death->cookie, |
2132 | (u64)cookie); | |
355b0502 GKH |
2133 | break; |
2134 | } | |
2135 | ref->death = NULL; | |
2136 | if (list_empty(&death->work.entry)) { | |
2137 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; | |
2138 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { | |
2139 | list_add_tail(&death->work.entry, &thread->todo); | |
2140 | } else { | |
2141 | list_add_tail(&death->work.entry, &proc->todo); | |
2142 | wake_up_interruptible(&proc->wait); | |
2143 | } | |
2144 | } else { | |
2145 | BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER); | |
2146 | death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR; | |
2147 | } | |
2148 | } | |
2149 | } break; | |
2150 | case BC_DEAD_BINDER_DONE: { | |
2151 | struct binder_work *w; | |
da49889d | 2152 | binder_uintptr_t cookie; |
355b0502 | 2153 | struct binder_ref_death *death = NULL; |
10f62861 | 2154 | |
da49889d | 2155 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) |
355b0502 GKH |
2156 | return -EFAULT; |
2157 | ||
7a64cd88 | 2158 | ptr += sizeof(cookie); |
355b0502 GKH |
2159 | list_for_each_entry(w, &proc->delivered_death, entry) { |
2160 | struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work); | |
10f62861 | 2161 | |
355b0502 GKH |
2162 | if (tmp_death->cookie == cookie) { |
2163 | death = tmp_death; | |
2164 | break; | |
2165 | } | |
2166 | } | |
2167 | binder_debug(BINDER_DEBUG_DEAD_BINDER, | |
da49889d AH |
2168 | "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n", |
2169 | proc->pid, thread->pid, (u64)cookie, | |
2170 | death); | |
355b0502 | 2171 | if (death == NULL) { |
da49889d AH |
2172 | binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n", |
2173 | proc->pid, thread->pid, (u64)cookie); | |
355b0502 GKH |
2174 | break; |
2175 | } | |
2176 | ||
2177 | list_del_init(&death->work.entry); | |
2178 | if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) { | |
2179 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; | |
2180 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { | |
2181 | list_add_tail(&death->work.entry, &thread->todo); | |
2182 | } else { | |
2183 | list_add_tail(&death->work.entry, &proc->todo); | |
2184 | wake_up_interruptible(&proc->wait); | |
2185 | } | |
2186 | } | |
2187 | } break; | |
2188 | ||
2189 | default: | |
56b468fc | 2190 | pr_err("%d:%d unknown command %d\n", |
355b0502 GKH |
2191 | proc->pid, thread->pid, cmd); |
2192 | return -EINVAL; | |
2193 | } | |
2194 | *consumed = ptr - buffer; | |
2195 | } | |
2196 | return 0; | |
2197 | } | |
2198 | ||
fb07ebc3 BP |
2199 | static void binder_stat_br(struct binder_proc *proc, |
2200 | struct binder_thread *thread, uint32_t cmd) | |
355b0502 | 2201 | { |
975a1ac9 | 2202 | trace_binder_return(cmd); |
355b0502 | 2203 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) { |
0953c797 BJS |
2204 | atomic_inc(&binder_stats.br[_IOC_NR(cmd)]); |
2205 | atomic_inc(&proc->stats.br[_IOC_NR(cmd)]); | |
2206 | atomic_inc(&thread->stats.br[_IOC_NR(cmd)]); | |
355b0502 GKH |
2207 | } |
2208 | } | |
2209 | ||
2210 | static int binder_has_proc_work(struct binder_proc *proc, | |
2211 | struct binder_thread *thread) | |
2212 | { | |
2213 | return !list_empty(&proc->todo) || | |
2214 | (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); | |
2215 | } | |
2216 | ||
2217 | static int binder_has_thread_work(struct binder_thread *thread) | |
2218 | { | |
2219 | return !list_empty(&thread->todo) || thread->return_error != BR_OK || | |
2220 | (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); | |
2221 | } | |
2222 | ||
2223 | static int binder_thread_read(struct binder_proc *proc, | |
2224 | struct binder_thread *thread, | |
da49889d AH |
2225 | binder_uintptr_t binder_buffer, size_t size, |
2226 | binder_size_t *consumed, int non_block) | |
355b0502 | 2227 | { |
da49889d | 2228 | void __user *buffer = (void __user *)(uintptr_t)binder_buffer; |
355b0502 GKH |
2229 | void __user *ptr = buffer + *consumed; |
2230 | void __user *end = buffer + size; | |
2231 | ||
2232 | int ret = 0; | |
2233 | int wait_for_proc_work; | |
2234 | ||
2235 | if (*consumed == 0) { | |
2236 | if (put_user(BR_NOOP, (uint32_t __user *)ptr)) | |
2237 | return -EFAULT; | |
2238 | ptr += sizeof(uint32_t); | |
2239 | } | |
2240 | ||
2241 | retry: | |
2242 | wait_for_proc_work = thread->transaction_stack == NULL && | |
2243 | list_empty(&thread->todo); | |
2244 | ||
2245 | if (thread->return_error != BR_OK && ptr < end) { | |
2246 | if (thread->return_error2 != BR_OK) { | |
2247 | if (put_user(thread->return_error2, (uint32_t __user *)ptr)) | |
2248 | return -EFAULT; | |
2249 | ptr += sizeof(uint32_t); | |
89334ab4 | 2250 | binder_stat_br(proc, thread, thread->return_error2); |
355b0502 GKH |
2251 | if (ptr == end) |
2252 | goto done; | |
2253 | thread->return_error2 = BR_OK; | |
2254 | } | |
2255 | if (put_user(thread->return_error, (uint32_t __user *)ptr)) | |
2256 | return -EFAULT; | |
2257 | ptr += sizeof(uint32_t); | |
89334ab4 | 2258 | binder_stat_br(proc, thread, thread->return_error); |
355b0502 GKH |
2259 | thread->return_error = BR_OK; |
2260 | goto done; | |
2261 | } | |
2262 | ||
2263 | ||
2264 | thread->looper |= BINDER_LOOPER_STATE_WAITING; | |
2265 | if (wait_for_proc_work) | |
2266 | proc->ready_threads++; | |
975a1ac9 AH |
2267 | |
2268 | binder_unlock(__func__); | |
2269 | ||
2270 | trace_binder_wait_for_work(wait_for_proc_work, | |
2271 | !!thread->transaction_stack, | |
2272 | !list_empty(&thread->todo)); | |
355b0502 GKH |
2273 | if (wait_for_proc_work) { |
2274 | if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED | | |
2275 | BINDER_LOOPER_STATE_ENTERED))) { | |
56b468fc | 2276 | 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 |
2277 | proc->pid, thread->pid, thread->looper); |
2278 | wait_event_interruptible(binder_user_error_wait, | |
2279 | binder_stop_on_user_error < 2); | |
2280 | } | |
2281 | binder_set_nice(proc->default_priority); | |
2282 | if (non_block) { | |
2283 | if (!binder_has_proc_work(proc, thread)) | |
2284 | ret = -EAGAIN; | |
2285 | } else | |
e2610b26 | 2286 | ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread)); |
355b0502 GKH |
2287 | } else { |
2288 | if (non_block) { | |
2289 | if (!binder_has_thread_work(thread)) | |
2290 | ret = -EAGAIN; | |
2291 | } else | |
e2610b26 | 2292 | ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread)); |
355b0502 | 2293 | } |
975a1ac9 AH |
2294 | |
2295 | binder_lock(__func__); | |
2296 | ||
355b0502 GKH |
2297 | if (wait_for_proc_work) |
2298 | proc->ready_threads--; | |
2299 | thread->looper &= ~BINDER_LOOPER_STATE_WAITING; | |
2300 | ||
2301 | if (ret) | |
2302 | return ret; | |
2303 | ||
2304 | while (1) { | |
2305 | uint32_t cmd; | |
2306 | struct binder_transaction_data tr; | |
2307 | struct binder_work *w; | |
2308 | struct binder_transaction *t = NULL; | |
2309 | ||
395262a9 DV |
2310 | if (!list_empty(&thread->todo)) { |
2311 | w = list_first_entry(&thread->todo, struct binder_work, | |
2312 | entry); | |
2313 | } else if (!list_empty(&proc->todo) && wait_for_proc_work) { | |
2314 | w = list_first_entry(&proc->todo, struct binder_work, | |
2315 | entry); | |
2316 | } else { | |
2317 | /* no data added */ | |
2318 | if (ptr - buffer == 4 && | |
2319 | !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) | |
355b0502 GKH |
2320 | goto retry; |
2321 | break; | |
2322 | } | |
2323 | ||
2324 | if (end - ptr < sizeof(tr) + 4) | |
2325 | break; | |
2326 | ||
2327 | switch (w->type) { | |
2328 | case BINDER_WORK_TRANSACTION: { | |
2329 | t = container_of(w, struct binder_transaction, work); | |
2330 | } break; | |
2331 | case BINDER_WORK_TRANSACTION_COMPLETE: { | |
2332 | cmd = BR_TRANSACTION_COMPLETE; | |
2333 | if (put_user(cmd, (uint32_t __user *)ptr)) | |
2334 | return -EFAULT; | |
2335 | ptr += sizeof(uint32_t); | |
2336 | ||
2337 | binder_stat_br(proc, thread, cmd); | |
2338 | binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE, | |
56b468fc | 2339 | "%d:%d BR_TRANSACTION_COMPLETE\n", |
355b0502 GKH |
2340 | proc->pid, thread->pid); |
2341 | ||
2342 | list_del(&w->entry); | |
2343 | kfree(w); | |
2344 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); | |
2345 | } break; | |
2346 | case BINDER_WORK_NODE: { | |
2347 | struct binder_node *node = container_of(w, struct binder_node, work); | |
2348 | uint32_t cmd = BR_NOOP; | |
2349 | const char *cmd_name; | |
2350 | int strong = node->internal_strong_refs || node->local_strong_refs; | |
2351 | int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong; | |
10f62861 | 2352 | |
355b0502 GKH |
2353 | if (weak && !node->has_weak_ref) { |
2354 | cmd = BR_INCREFS; | |
2355 | cmd_name = "BR_INCREFS"; | |
2356 | node->has_weak_ref = 1; | |
2357 | node->pending_weak_ref = 1; | |
2358 | node->local_weak_refs++; | |
2359 | } else if (strong && !node->has_strong_ref) { | |
2360 | cmd = BR_ACQUIRE; | |
2361 | cmd_name = "BR_ACQUIRE"; | |
2362 | node->has_strong_ref = 1; | |
2363 | node->pending_strong_ref = 1; | |
2364 | node->local_strong_refs++; | |
2365 | } else if (!strong && node->has_strong_ref) { | |
2366 | cmd = BR_RELEASE; | |
2367 | cmd_name = "BR_RELEASE"; | |
2368 | node->has_strong_ref = 0; | |
2369 | } else if (!weak && node->has_weak_ref) { | |
2370 | cmd = BR_DECREFS; | |
2371 | cmd_name = "BR_DECREFS"; | |
2372 | node->has_weak_ref = 0; | |
2373 | } | |
2374 | if (cmd != BR_NOOP) { | |
2375 | if (put_user(cmd, (uint32_t __user *)ptr)) | |
2376 | return -EFAULT; | |
2377 | ptr += sizeof(uint32_t); | |
da49889d AH |
2378 | if (put_user(node->ptr, |
2379 | (binder_uintptr_t __user *)ptr)) | |
355b0502 | 2380 | return -EFAULT; |
da49889d AH |
2381 | ptr += sizeof(binder_uintptr_t); |
2382 | if (put_user(node->cookie, | |
2383 | (binder_uintptr_t __user *)ptr)) | |
355b0502 | 2384 | return -EFAULT; |
da49889d | 2385 | ptr += sizeof(binder_uintptr_t); |
355b0502 GKH |
2386 | |
2387 | binder_stat_br(proc, thread, cmd); | |
2388 | binder_debug(BINDER_DEBUG_USER_REFS, | |
da49889d AH |
2389 | "%d:%d %s %d u%016llx c%016llx\n", |
2390 | proc->pid, thread->pid, cmd_name, | |
2391 | node->debug_id, | |
2392 | (u64)node->ptr, (u64)node->cookie); | |
355b0502 GKH |
2393 | } else { |
2394 | list_del_init(&w->entry); | |
2395 | if (!weak && !strong) { | |
2396 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
da49889d AH |
2397 | "%d:%d node %d u%016llx c%016llx deleted\n", |
2398 | proc->pid, thread->pid, | |
2399 | node->debug_id, | |
2400 | (u64)node->ptr, | |
2401 | (u64)node->cookie); | |
355b0502 GKH |
2402 | rb_erase(&node->rb_node, &proc->nodes); |
2403 | kfree(node); | |
2404 | binder_stats_deleted(BINDER_STAT_NODE); | |
2405 | } else { | |
2406 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, | |
da49889d AH |
2407 | "%d:%d node %d u%016llx c%016llx state unchanged\n", |
2408 | proc->pid, thread->pid, | |
2409 | node->debug_id, | |
2410 | (u64)node->ptr, | |
2411 | (u64)node->cookie); | |
355b0502 GKH |
2412 | } |
2413 | } | |
2414 | } break; | |
2415 | case BINDER_WORK_DEAD_BINDER: | |
2416 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: | |
2417 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { | |
2418 | struct binder_ref_death *death; | |
2419 | uint32_t cmd; | |
2420 | ||
2421 | death = container_of(w, struct binder_ref_death, work); | |
2422 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) | |
2423 | cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE; | |
2424 | else | |
2425 | cmd = BR_DEAD_BINDER; | |
2426 | if (put_user(cmd, (uint32_t __user *)ptr)) | |
2427 | return -EFAULT; | |
2428 | ptr += sizeof(uint32_t); | |
da49889d AH |
2429 | if (put_user(death->cookie, |
2430 | (binder_uintptr_t __user *)ptr)) | |
355b0502 | 2431 | return -EFAULT; |
da49889d | 2432 | ptr += sizeof(binder_uintptr_t); |
89334ab4 | 2433 | binder_stat_br(proc, thread, cmd); |
355b0502 | 2434 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, |
da49889d | 2435 | "%d:%d %s %016llx\n", |
355b0502 GKH |
2436 | proc->pid, thread->pid, |
2437 | cmd == BR_DEAD_BINDER ? | |
2438 | "BR_DEAD_BINDER" : | |
2439 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", | |
da49889d | 2440 | (u64)death->cookie); |
355b0502 GKH |
2441 | |
2442 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) { | |
2443 | list_del(&w->entry); | |
2444 | kfree(death); | |
2445 | binder_stats_deleted(BINDER_STAT_DEATH); | |
2446 | } else | |
2447 | list_move(&w->entry, &proc->delivered_death); | |
2448 | if (cmd == BR_DEAD_BINDER) | |
2449 | goto done; /* DEAD_BINDER notifications can cause transactions */ | |
2450 | } break; | |
2451 | } | |
2452 | ||
2453 | if (!t) | |
2454 | continue; | |
2455 | ||
2456 | BUG_ON(t->buffer == NULL); | |
2457 | if (t->buffer->target_node) { | |
2458 | struct binder_node *target_node = t->buffer->target_node; | |
10f62861 | 2459 | |
355b0502 GKH |
2460 | tr.target.ptr = target_node->ptr; |
2461 | tr.cookie = target_node->cookie; | |
2462 | t->saved_priority = task_nice(current); | |
2463 | if (t->priority < target_node->min_priority && | |
2464 | !(t->flags & TF_ONE_WAY)) | |
2465 | binder_set_nice(t->priority); | |
2466 | else if (!(t->flags & TF_ONE_WAY) || | |
2467 | t->saved_priority > target_node->min_priority) | |
2468 | binder_set_nice(target_node->min_priority); | |
2469 | cmd = BR_TRANSACTION; | |
2470 | } else { | |
da49889d AH |
2471 | tr.target.ptr = 0; |
2472 | tr.cookie = 0; | |
355b0502 GKH |
2473 | cmd = BR_REPLY; |
2474 | } | |
2475 | tr.code = t->code; | |
2476 | tr.flags = t->flags; | |
4a2ebb93 | 2477 | tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid); |
355b0502 GKH |
2478 | |
2479 | if (t->from) { | |
2480 | struct task_struct *sender = t->from->proc->tsk; | |
10f62861 | 2481 | |
355b0502 | 2482 | tr.sender_pid = task_tgid_nr_ns(sender, |
17cf22c3 | 2483 | task_active_pid_ns(current)); |
355b0502 GKH |
2484 | } else { |
2485 | tr.sender_pid = 0; | |
2486 | } | |
2487 | ||
2488 | tr.data_size = t->buffer->data_size; | |
2489 | tr.offsets_size = t->buffer->offsets_size; | |
19c98724 TK |
2490 | tr.data.ptr.buffer = (binder_uintptr_t) |
2491 | ((uintptr_t)t->buffer->data + | |
2492 | binder_alloc_get_user_buffer_offset(&proc->alloc)); | |
355b0502 GKH |
2493 | tr.data.ptr.offsets = tr.data.ptr.buffer + |
2494 | ALIGN(t->buffer->data_size, | |
2495 | sizeof(void *)); | |
2496 | ||
2497 | if (put_user(cmd, (uint32_t __user *)ptr)) | |
2498 | return -EFAULT; | |
2499 | ptr += sizeof(uint32_t); | |
2500 | if (copy_to_user(ptr, &tr, sizeof(tr))) | |
2501 | return -EFAULT; | |
2502 | ptr += sizeof(tr); | |
2503 | ||
975a1ac9 | 2504 | trace_binder_transaction_received(t); |
355b0502 GKH |
2505 | binder_stat_br(proc, thread, cmd); |
2506 | binder_debug(BINDER_DEBUG_TRANSACTION, | |
da49889d | 2507 | "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n", |
355b0502 GKH |
2508 | proc->pid, thread->pid, |
2509 | (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" : | |
2510 | "BR_REPLY", | |
2511 | t->debug_id, t->from ? t->from->proc->pid : 0, | |
2512 | t->from ? t->from->pid : 0, cmd, | |
2513 | t->buffer->data_size, t->buffer->offsets_size, | |
da49889d | 2514 | (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets); |
355b0502 GKH |
2515 | |
2516 | list_del(&t->work.entry); | |
2517 | t->buffer->allow_user_free = 1; | |
2518 | if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) { | |
2519 | t->to_parent = thread->transaction_stack; | |
2520 | t->to_thread = thread; | |
2521 | thread->transaction_stack = t; | |
2522 | } else { | |
2523 | t->buffer->transaction = NULL; | |
2524 | kfree(t); | |
2525 | binder_stats_deleted(BINDER_STAT_TRANSACTION); | |
2526 | } | |
2527 | break; | |
2528 | } | |
2529 | ||
2530 | done: | |
2531 | ||
2532 | *consumed = ptr - buffer; | |
2533 | if (proc->requested_threads + proc->ready_threads == 0 && | |
2534 | proc->requested_threads_started < proc->max_threads && | |
2535 | (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | | |
2536 | BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */ | |
2537 | /*spawn a new thread if we leave this out */) { | |
2538 | proc->requested_threads++; | |
2539 | binder_debug(BINDER_DEBUG_THREADS, | |
56b468fc | 2540 | "%d:%d BR_SPAWN_LOOPER\n", |
355b0502 GKH |
2541 | proc->pid, thread->pid); |
2542 | if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer)) | |
2543 | return -EFAULT; | |
89334ab4 | 2544 | binder_stat_br(proc, thread, BR_SPAWN_LOOPER); |
355b0502 GKH |
2545 | } |
2546 | return 0; | |
2547 | } | |
2548 | ||
2549 | static void binder_release_work(struct list_head *list) | |
2550 | { | |
2551 | struct binder_work *w; | |
10f62861 | 2552 | |
355b0502 GKH |
2553 | while (!list_empty(list)) { |
2554 | w = list_first_entry(list, struct binder_work, entry); | |
2555 | list_del_init(&w->entry); | |
2556 | switch (w->type) { | |
2557 | case BINDER_WORK_TRANSACTION: { | |
2558 | struct binder_transaction *t; | |
2559 | ||
2560 | t = container_of(w, struct binder_transaction, work); | |
675d66b0 AH |
2561 | if (t->buffer->target_node && |
2562 | !(t->flags & TF_ONE_WAY)) { | |
355b0502 | 2563 | binder_send_failed_reply(t, BR_DEAD_REPLY); |
675d66b0 AH |
2564 | } else { |
2565 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, | |
56b468fc | 2566 | "undelivered transaction %d\n", |
675d66b0 AH |
2567 | t->debug_id); |
2568 | t->buffer->transaction = NULL; | |
2569 | kfree(t); | |
2570 | binder_stats_deleted(BINDER_STAT_TRANSACTION); | |
2571 | } | |
355b0502 GKH |
2572 | } break; |
2573 | case BINDER_WORK_TRANSACTION_COMPLETE: { | |
675d66b0 | 2574 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
56b468fc | 2575 | "undelivered TRANSACTION_COMPLETE\n"); |
355b0502 GKH |
2576 | kfree(w); |
2577 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); | |
2578 | } break; | |
675d66b0 AH |
2579 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
2580 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { | |
2581 | struct binder_ref_death *death; | |
2582 | ||
2583 | death = container_of(w, struct binder_ref_death, work); | |
2584 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, | |
da49889d AH |
2585 | "undelivered death notification, %016llx\n", |
2586 | (u64)death->cookie); | |
675d66b0 AH |
2587 | kfree(death); |
2588 | binder_stats_deleted(BINDER_STAT_DEATH); | |
2589 | } break; | |
355b0502 | 2590 | default: |
56b468fc | 2591 | pr_err("unexpected work type, %d, not freed\n", |
675d66b0 | 2592 | w->type); |
355b0502 GKH |
2593 | break; |
2594 | } | |
2595 | } | |
2596 | ||
2597 | } | |
2598 | ||
2599 | static struct binder_thread *binder_get_thread(struct binder_proc *proc) | |
2600 | { | |
2601 | struct binder_thread *thread = NULL; | |
2602 | struct rb_node *parent = NULL; | |
2603 | struct rb_node **p = &proc->threads.rb_node; | |
2604 | ||
2605 | while (*p) { | |
2606 | parent = *p; | |
2607 | thread = rb_entry(parent, struct binder_thread, rb_node); | |
2608 | ||
2609 | if (current->pid < thread->pid) | |
2610 | p = &(*p)->rb_left; | |
2611 | else if (current->pid > thread->pid) | |
2612 | p = &(*p)->rb_right; | |
2613 | else | |
2614 | break; | |
2615 | } | |
2616 | if (*p == NULL) { | |
2617 | thread = kzalloc(sizeof(*thread), GFP_KERNEL); | |
2618 | if (thread == NULL) | |
2619 | return NULL; | |
2620 | binder_stats_created(BINDER_STAT_THREAD); | |
2621 | thread->proc = proc; | |
2622 | thread->pid = current->pid; | |
2623 | init_waitqueue_head(&thread->wait); | |
2624 | INIT_LIST_HEAD(&thread->todo); | |
2625 | rb_link_node(&thread->rb_node, parent, p); | |
2626 | rb_insert_color(&thread->rb_node, &proc->threads); | |
2627 | thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; | |
2628 | thread->return_error = BR_OK; | |
2629 | thread->return_error2 = BR_OK; | |
2630 | } | |
2631 | return thread; | |
2632 | } | |
2633 | ||
2634 | static int binder_free_thread(struct binder_proc *proc, | |
2635 | struct binder_thread *thread) | |
2636 | { | |
2637 | struct binder_transaction *t; | |
2638 | struct binder_transaction *send_reply = NULL; | |
2639 | int active_transactions = 0; | |
2640 | ||
2641 | rb_erase(&thread->rb_node, &proc->threads); | |
2642 | t = thread->transaction_stack; | |
2643 | if (t && t->to_thread == thread) | |
2644 | send_reply = t; | |
2645 | while (t) { | |
2646 | active_transactions++; | |
2647 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, | |
56b468fc AS |
2648 | "release %d:%d transaction %d %s, still active\n", |
2649 | proc->pid, thread->pid, | |
355b0502 GKH |
2650 | t->debug_id, |
2651 | (t->to_thread == thread) ? "in" : "out"); | |
2652 | ||
2653 | if (t->to_thread == thread) { | |
2654 | t->to_proc = NULL; | |
2655 | t->to_thread = NULL; | |
2656 | if (t->buffer) { | |
2657 | t->buffer->transaction = NULL; | |
2658 | t->buffer = NULL; | |
2659 | } | |
2660 | t = t->to_parent; | |
2661 | } else if (t->from == thread) { | |
2662 | t->from = NULL; | |
2663 | t = t->from_parent; | |
2664 | } else | |
2665 | BUG(); | |
2666 | } | |
2667 | if (send_reply) | |
2668 | binder_send_failed_reply(send_reply, BR_DEAD_REPLY); | |
2669 | binder_release_work(&thread->todo); | |
2670 | kfree(thread); | |
2671 | binder_stats_deleted(BINDER_STAT_THREAD); | |
2672 | return active_transactions; | |
2673 | } | |
2674 | ||
2675 | static unsigned int binder_poll(struct file *filp, | |
2676 | struct poll_table_struct *wait) | |
2677 | { | |
2678 | struct binder_proc *proc = filp->private_data; | |
2679 | struct binder_thread *thread = NULL; | |
2680 | int wait_for_proc_work; | |
2681 | ||
975a1ac9 AH |
2682 | binder_lock(__func__); |
2683 | ||
355b0502 GKH |
2684 | thread = binder_get_thread(proc); |
2685 | ||
2686 | wait_for_proc_work = thread->transaction_stack == NULL && | |
2687 | list_empty(&thread->todo) && thread->return_error == BR_OK; | |
975a1ac9 AH |
2688 | |
2689 | binder_unlock(__func__); | |
355b0502 GKH |
2690 | |
2691 | if (wait_for_proc_work) { | |
2692 | if (binder_has_proc_work(proc, thread)) | |
2693 | return POLLIN; | |
2694 | poll_wait(filp, &proc->wait, wait); | |
2695 | if (binder_has_proc_work(proc, thread)) | |
2696 | return POLLIN; | |
2697 | } else { | |
2698 | if (binder_has_thread_work(thread)) | |
2699 | return POLLIN; | |
2700 | poll_wait(filp, &thread->wait, wait); | |
2701 | if (binder_has_thread_work(thread)) | |
2702 | return POLLIN; | |
2703 | } | |
2704 | return 0; | |
2705 | } | |
2706 | ||
78260ac6 TR |
2707 | static int binder_ioctl_write_read(struct file *filp, |
2708 | unsigned int cmd, unsigned long arg, | |
2709 | struct binder_thread *thread) | |
2710 | { | |
2711 | int ret = 0; | |
2712 | struct binder_proc *proc = filp->private_data; | |
2713 | unsigned int size = _IOC_SIZE(cmd); | |
2714 | void __user *ubuf = (void __user *)arg; | |
2715 | struct binder_write_read bwr; | |
2716 | ||
2717 | if (size != sizeof(struct binder_write_read)) { | |
2718 | ret = -EINVAL; | |
2719 | goto out; | |
2720 | } | |
2721 | if (copy_from_user(&bwr, ubuf, sizeof(bwr))) { | |
2722 | ret = -EFAULT; | |
2723 | goto out; | |
2724 | } | |
2725 | binder_debug(BINDER_DEBUG_READ_WRITE, | |
2726 | "%d:%d write %lld at %016llx, read %lld at %016llx\n", | |
2727 | proc->pid, thread->pid, | |
2728 | (u64)bwr.write_size, (u64)bwr.write_buffer, | |
2729 | (u64)bwr.read_size, (u64)bwr.read_buffer); | |
2730 | ||
2731 | if (bwr.write_size > 0) { | |
2732 | ret = binder_thread_write(proc, thread, | |
2733 | bwr.write_buffer, | |
2734 | bwr.write_size, | |
2735 | &bwr.write_consumed); | |
2736 | trace_binder_write_done(ret); | |
2737 | if (ret < 0) { | |
2738 | bwr.read_consumed = 0; | |
2739 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) | |
2740 | ret = -EFAULT; | |
2741 | goto out; | |
2742 | } | |
2743 | } | |
2744 | if (bwr.read_size > 0) { | |
2745 | ret = binder_thread_read(proc, thread, bwr.read_buffer, | |
2746 | bwr.read_size, | |
2747 | &bwr.read_consumed, | |
2748 | filp->f_flags & O_NONBLOCK); | |
2749 | trace_binder_read_done(ret); | |
2750 | if (!list_empty(&proc->todo)) | |
2751 | wake_up_interruptible(&proc->wait); | |
2752 | if (ret < 0) { | |
2753 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) | |
2754 | ret = -EFAULT; | |
2755 | goto out; | |
2756 | } | |
2757 | } | |
2758 | binder_debug(BINDER_DEBUG_READ_WRITE, | |
2759 | "%d:%d wrote %lld of %lld, read return %lld of %lld\n", | |
2760 | proc->pid, thread->pid, | |
2761 | (u64)bwr.write_consumed, (u64)bwr.write_size, | |
2762 | (u64)bwr.read_consumed, (u64)bwr.read_size); | |
2763 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) { | |
2764 | ret = -EFAULT; | |
2765 | goto out; | |
2766 | } | |
2767 | out: | |
2768 | return ret; | |
2769 | } | |
2770 | ||
2771 | static int binder_ioctl_set_ctx_mgr(struct file *filp) | |
2772 | { | |
2773 | int ret = 0; | |
2774 | struct binder_proc *proc = filp->private_data; | |
342e5c90 | 2775 | struct binder_context *context = proc->context; |
c44b1231 | 2776 | struct binder_node *new_node; |
78260ac6 TR |
2777 | kuid_t curr_euid = current_euid(); |
2778 | ||
c44b1231 | 2779 | mutex_lock(&context->context_mgr_node_lock); |
342e5c90 | 2780 | if (context->binder_context_mgr_node) { |
78260ac6 TR |
2781 | pr_err("BINDER_SET_CONTEXT_MGR already set\n"); |
2782 | ret = -EBUSY; | |
2783 | goto out; | |
2784 | } | |
79af7307 SS |
2785 | ret = security_binder_set_context_mgr(proc->tsk); |
2786 | if (ret < 0) | |
2787 | goto out; | |
342e5c90 MC |
2788 | if (uid_valid(context->binder_context_mgr_uid)) { |
2789 | if (!uid_eq(context->binder_context_mgr_uid, curr_euid)) { | |
78260ac6 TR |
2790 | pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n", |
2791 | from_kuid(&init_user_ns, curr_euid), | |
2792 | from_kuid(&init_user_ns, | |
342e5c90 | 2793 | context->binder_context_mgr_uid)); |
78260ac6 TR |
2794 | ret = -EPERM; |
2795 | goto out; | |
2796 | } | |
2797 | } else { | |
342e5c90 | 2798 | context->binder_context_mgr_uid = curr_euid; |
78260ac6 | 2799 | } |
c44b1231 TK |
2800 | new_node = binder_new_node(proc, 0, 0); |
2801 | if (!new_node) { | |
78260ac6 TR |
2802 | ret = -ENOMEM; |
2803 | goto out; | |
2804 | } | |
c44b1231 TK |
2805 | new_node->local_weak_refs++; |
2806 | new_node->local_strong_refs++; | |
2807 | new_node->has_strong_ref = 1; | |
2808 | new_node->has_weak_ref = 1; | |
2809 | context->binder_context_mgr_node = new_node; | |
78260ac6 | 2810 | out: |
c44b1231 | 2811 | mutex_unlock(&context->context_mgr_node_lock); |
78260ac6 TR |
2812 | return ret; |
2813 | } | |
2814 | ||
355b0502 GKH |
2815 | static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
2816 | { | |
2817 | int ret; | |
2818 | struct binder_proc *proc = filp->private_data; | |
2819 | struct binder_thread *thread; | |
2820 | unsigned int size = _IOC_SIZE(cmd); | |
2821 | void __user *ubuf = (void __user *)arg; | |
2822 | ||
78260ac6 TR |
2823 | /*pr_info("binder_ioctl: %d:%d %x %lx\n", |
2824 | proc->pid, current->pid, cmd, arg);*/ | |
355b0502 | 2825 | |
975a1ac9 AH |
2826 | trace_binder_ioctl(cmd, arg); |
2827 | ||
355b0502 GKH |
2828 | ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
2829 | if (ret) | |
975a1ac9 | 2830 | goto err_unlocked; |
355b0502 | 2831 | |
975a1ac9 | 2832 | binder_lock(__func__); |
355b0502 GKH |
2833 | thread = binder_get_thread(proc); |
2834 | if (thread == NULL) { | |
2835 | ret = -ENOMEM; | |
2836 | goto err; | |
2837 | } | |
2838 | ||
2839 | switch (cmd) { | |
78260ac6 TR |
2840 | case BINDER_WRITE_READ: |
2841 | ret = binder_ioctl_write_read(filp, cmd, arg, thread); | |
2842 | if (ret) | |
355b0502 | 2843 | goto err; |
355b0502 | 2844 | break; |
355b0502 GKH |
2845 | case BINDER_SET_MAX_THREADS: |
2846 | if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) { | |
2847 | ret = -EINVAL; | |
2848 | goto err; | |
2849 | } | |
2850 | break; | |
2851 | case BINDER_SET_CONTEXT_MGR: | |
78260ac6 TR |
2852 | ret = binder_ioctl_set_ctx_mgr(filp); |
2853 | if (ret) | |
355b0502 | 2854 | goto err; |
355b0502 GKH |
2855 | break; |
2856 | case BINDER_THREAD_EXIT: | |
56b468fc | 2857 | binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n", |
355b0502 GKH |
2858 | proc->pid, thread->pid); |
2859 | binder_free_thread(proc, thread); | |
2860 | thread = NULL; | |
2861 | break; | |
36c89c0a MM |
2862 | case BINDER_VERSION: { |
2863 | struct binder_version __user *ver = ubuf; | |
2864 | ||
355b0502 GKH |
2865 | if (size != sizeof(struct binder_version)) { |
2866 | ret = -EINVAL; | |
2867 | goto err; | |
2868 | } | |
36c89c0a MM |
2869 | if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, |
2870 | &ver->protocol_version)) { | |
355b0502 GKH |
2871 | ret = -EINVAL; |
2872 | goto err; | |
2873 | } | |
2874 | break; | |
36c89c0a | 2875 | } |
355b0502 GKH |
2876 | default: |
2877 | ret = -EINVAL; | |
2878 | goto err; | |
2879 | } | |
2880 | ret = 0; | |
2881 | err: | |
2882 | if (thread) | |
2883 | thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN; | |
975a1ac9 | 2884 | binder_unlock(__func__); |
355b0502 GKH |
2885 | wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
2886 | if (ret && ret != -ERESTARTSYS) | |
56b468fc | 2887 | pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret); |
975a1ac9 AH |
2888 | err_unlocked: |
2889 | trace_binder_ioctl_done(ret); | |
355b0502 GKH |
2890 | return ret; |
2891 | } | |
2892 | ||
2893 | static void binder_vma_open(struct vm_area_struct *vma) | |
2894 | { | |
2895 | struct binder_proc *proc = vma->vm_private_data; | |
10f62861 | 2896 | |
355b0502 | 2897 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
56b468fc | 2898 | "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", |
355b0502 GKH |
2899 | proc->pid, vma->vm_start, vma->vm_end, |
2900 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, | |
2901 | (unsigned long)pgprot_val(vma->vm_page_prot)); | |
355b0502 GKH |
2902 | } |
2903 | ||
2904 | static void binder_vma_close(struct vm_area_struct *vma) | |
2905 | { | |
2906 | struct binder_proc *proc = vma->vm_private_data; | |
10f62861 | 2907 | |
355b0502 | 2908 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
56b468fc | 2909 | "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", |
355b0502 GKH |
2910 | proc->pid, vma->vm_start, vma->vm_end, |
2911 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, | |
2912 | (unsigned long)pgprot_val(vma->vm_page_prot)); | |
19c98724 | 2913 | binder_alloc_vma_close(&proc->alloc); |
355b0502 GKH |
2914 | binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES); |
2915 | } | |
2916 | ||
11bac800 | 2917 | static int binder_vm_fault(struct vm_fault *vmf) |
ddac7d5f VM |
2918 | { |
2919 | return VM_FAULT_SIGBUS; | |
2920 | } | |
2921 | ||
7cbea8dc | 2922 | static const struct vm_operations_struct binder_vm_ops = { |
355b0502 GKH |
2923 | .open = binder_vma_open, |
2924 | .close = binder_vma_close, | |
ddac7d5f | 2925 | .fault = binder_vm_fault, |
355b0502 GKH |
2926 | }; |
2927 | ||
19c98724 TK |
2928 | static int binder_mmap(struct file *filp, struct vm_area_struct *vma) |
2929 | { | |
2930 | int ret; | |
2931 | struct binder_proc *proc = filp->private_data; | |
2932 | const char *failure_string; | |
2933 | ||
2934 | if (proc->tsk != current->group_leader) | |
2935 | return -EINVAL; | |
2936 | ||
2937 | if ((vma->vm_end - vma->vm_start) > SZ_4M) | |
2938 | vma->vm_end = vma->vm_start + SZ_4M; | |
2939 | ||
2940 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, | |
2941 | "%s: %d %lx-%lx (%ld K) vma %lx pagep %lx\n", | |
2942 | __func__, proc->pid, vma->vm_start, vma->vm_end, | |
2943 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, | |
2944 | (unsigned long)pgprot_val(vma->vm_page_prot)); | |
2945 | ||
2946 | if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) { | |
2947 | ret = -EPERM; | |
2948 | failure_string = "bad vm_flags"; | |
2949 | goto err_bad_arg; | |
2950 | } | |
2951 | vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE; | |
2952 | vma->vm_ops = &binder_vm_ops; | |
2953 | vma->vm_private_data = proc; | |
2954 | ||
2955 | ret = binder_alloc_mmap_handler(&proc->alloc, vma); | |
2956 | if (ret) | |
2957 | return ret; | |
2958 | proc->files = get_files_struct(current); | |
2959 | return 0; | |
2960 | ||
355b0502 | 2961 | err_bad_arg: |
258767fe | 2962 | pr_err("binder_mmap: %d %lx-%lx %s failed %d\n", |
355b0502 GKH |
2963 | proc->pid, vma->vm_start, vma->vm_end, failure_string, ret); |
2964 | return ret; | |
2965 | } | |
2966 | ||
2967 | static int binder_open(struct inode *nodp, struct file *filp) | |
2968 | { | |
2969 | struct binder_proc *proc; | |
ac4812c5 | 2970 | struct binder_device *binder_dev; |
355b0502 GKH |
2971 | |
2972 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n", | |
2973 | current->group_leader->pid, current->pid); | |
2974 | ||
2975 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
2976 | if (proc == NULL) | |
2977 | return -ENOMEM; | |
c4ea41ba TK |
2978 | get_task_struct(current->group_leader); |
2979 | proc->tsk = current->group_leader; | |
355b0502 GKH |
2980 | INIT_LIST_HEAD(&proc->todo); |
2981 | init_waitqueue_head(&proc->wait); | |
2982 | proc->default_priority = task_nice(current); | |
ac4812c5 MC |
2983 | binder_dev = container_of(filp->private_data, struct binder_device, |
2984 | miscdev); | |
2985 | proc->context = &binder_dev->context; | |
19c98724 | 2986 | binder_alloc_init(&proc->alloc); |
975a1ac9 AH |
2987 | |
2988 | binder_lock(__func__); | |
2989 | ||
355b0502 | 2990 | binder_stats_created(BINDER_STAT_PROC); |
355b0502 GKH |
2991 | proc->pid = current->group_leader->pid; |
2992 | INIT_LIST_HEAD(&proc->delivered_death); | |
2993 | filp->private_data = proc; | |
975a1ac9 AH |
2994 | |
2995 | binder_unlock(__func__); | |
355b0502 | 2996 | |
c44b1231 TK |
2997 | mutex_lock(&binder_procs_lock); |
2998 | hlist_add_head(&proc->proc_node, &binder_procs); | |
2999 | mutex_unlock(&binder_procs_lock); | |
3000 | ||
16b66554 | 3001 | if (binder_debugfs_dir_entry_proc) { |
355b0502 | 3002 | char strbuf[11]; |
10f62861 | 3003 | |
355b0502 | 3004 | snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); |
14db3181 MC |
3005 | /* |
3006 | * proc debug entries are shared between contexts, so | |
3007 | * this will fail if the process tries to open the driver | |
3008 | * again with a different context. The priting code will | |
3009 | * anyway print all contexts that a given PID has, so this | |
3010 | * is not a problem. | |
3011 | */ | |
16b66554 | 3012 | proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO, |
14db3181 MC |
3013 | binder_debugfs_dir_entry_proc, |
3014 | (void *)(unsigned long)proc->pid, | |
3015 | &binder_proc_fops); | |
355b0502 GKH |
3016 | } |
3017 | ||
3018 | return 0; | |
3019 | } | |
3020 | ||
3021 | static int binder_flush(struct file *filp, fl_owner_t id) | |
3022 | { | |
3023 | struct binder_proc *proc = filp->private_data; | |
3024 | ||
3025 | binder_defer_work(proc, BINDER_DEFERRED_FLUSH); | |
3026 | ||
3027 | return 0; | |
3028 | } | |
3029 | ||
3030 | static void binder_deferred_flush(struct binder_proc *proc) | |
3031 | { | |
3032 | struct rb_node *n; | |
3033 | int wake_count = 0; | |
10f62861 | 3034 | |
355b0502 GKH |
3035 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) { |
3036 | struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); | |
10f62861 | 3037 | |
355b0502 GKH |
3038 | thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; |
3039 | if (thread->looper & BINDER_LOOPER_STATE_WAITING) { | |
3040 | wake_up_interruptible(&thread->wait); | |
3041 | wake_count++; | |
3042 | } | |
3043 | } | |
3044 | wake_up_interruptible_all(&proc->wait); | |
3045 | ||
3046 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, | |
3047 | "binder_flush: %d woke %d threads\n", proc->pid, | |
3048 | wake_count); | |
3049 | } | |
3050 | ||
3051 | static int binder_release(struct inode *nodp, struct file *filp) | |
3052 | { | |
3053 | struct binder_proc *proc = filp->private_data; | |
10f62861 | 3054 | |
16b66554 | 3055 | debugfs_remove(proc->debugfs_entry); |
355b0502 GKH |
3056 | binder_defer_work(proc, BINDER_DEFERRED_RELEASE); |
3057 | ||
3058 | return 0; | |
3059 | } | |
3060 | ||
008fa749 ME |
3061 | static int binder_node_release(struct binder_node *node, int refs) |
3062 | { | |
3063 | struct binder_ref *ref; | |
3064 | int death = 0; | |
3065 | ||
3066 | list_del_init(&node->work.entry); | |
3067 | binder_release_work(&node->async_todo); | |
3068 | ||
3069 | if (hlist_empty(&node->refs)) { | |
3070 | kfree(node); | |
3071 | binder_stats_deleted(BINDER_STAT_NODE); | |
3072 | ||
3073 | return refs; | |
3074 | } | |
3075 | ||
3076 | node->proc = NULL; | |
3077 | node->local_strong_refs = 0; | |
3078 | node->local_weak_refs = 0; | |
c44b1231 TK |
3079 | |
3080 | spin_lock(&binder_dead_nodes_lock); | |
008fa749 | 3081 | hlist_add_head(&node->dead_node, &binder_dead_nodes); |
c44b1231 | 3082 | spin_unlock(&binder_dead_nodes_lock); |
008fa749 ME |
3083 | |
3084 | hlist_for_each_entry(ref, &node->refs, node_entry) { | |
3085 | refs++; | |
3086 | ||
3087 | if (!ref->death) | |
e194fd8a | 3088 | continue; |
008fa749 ME |
3089 | |
3090 | death++; | |
3091 | ||
3092 | if (list_empty(&ref->death->work.entry)) { | |
3093 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; | |
3094 | list_add_tail(&ref->death->work.entry, | |
3095 | &ref->proc->todo); | |
3096 | wake_up_interruptible(&ref->proc->wait); | |
3097 | } else | |
3098 | BUG(); | |
3099 | } | |
3100 | ||
008fa749 ME |
3101 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
3102 | "node %d now dead, refs %d, death %d\n", | |
3103 | node->debug_id, refs, death); | |
3104 | ||
3105 | return refs; | |
3106 | } | |
3107 | ||
355b0502 GKH |
3108 | static void binder_deferred_release(struct binder_proc *proc) |
3109 | { | |
342e5c90 | 3110 | struct binder_context *context = proc->context; |
355b0502 | 3111 | struct rb_node *n; |
19c98724 | 3112 | int threads, nodes, incoming_refs, outgoing_refs, active_transactions; |
355b0502 | 3113 | |
355b0502 GKH |
3114 | BUG_ON(proc->files); |
3115 | ||
c44b1231 | 3116 | mutex_lock(&binder_procs_lock); |
355b0502 | 3117 | hlist_del(&proc->proc_node); |
c44b1231 | 3118 | mutex_unlock(&binder_procs_lock); |
53413e7d | 3119 | |
c44b1231 | 3120 | mutex_lock(&context->context_mgr_node_lock); |
342e5c90 MC |
3121 | if (context->binder_context_mgr_node && |
3122 | context->binder_context_mgr_node->proc == proc) { | |
355b0502 | 3123 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
c07c933f ME |
3124 | "%s: %d context_mgr_node gone\n", |
3125 | __func__, proc->pid); | |
342e5c90 | 3126 | context->binder_context_mgr_node = NULL; |
355b0502 | 3127 | } |
c44b1231 | 3128 | mutex_unlock(&context->context_mgr_node_lock); |
355b0502 GKH |
3129 | |
3130 | threads = 0; | |
3131 | active_transactions = 0; | |
3132 | while ((n = rb_first(&proc->threads))) { | |
53413e7d ME |
3133 | struct binder_thread *thread; |
3134 | ||
3135 | thread = rb_entry(n, struct binder_thread, rb_node); | |
355b0502 GKH |
3136 | threads++; |
3137 | active_transactions += binder_free_thread(proc, thread); | |
3138 | } | |
53413e7d | 3139 | |
355b0502 GKH |
3140 | nodes = 0; |
3141 | incoming_refs = 0; | |
3142 | while ((n = rb_first(&proc->nodes))) { | |
53413e7d | 3143 | struct binder_node *node; |
355b0502 | 3144 | |
53413e7d | 3145 | node = rb_entry(n, struct binder_node, rb_node); |
355b0502 GKH |
3146 | nodes++; |
3147 | rb_erase(&node->rb_node, &proc->nodes); | |
008fa749 | 3148 | incoming_refs = binder_node_release(node, incoming_refs); |
355b0502 | 3149 | } |
53413e7d | 3150 | |
355b0502 GKH |
3151 | outgoing_refs = 0; |
3152 | while ((n = rb_first(&proc->refs_by_desc))) { | |
53413e7d ME |
3153 | struct binder_ref *ref; |
3154 | ||
3155 | ref = rb_entry(n, struct binder_ref, rb_node_desc); | |
355b0502 GKH |
3156 | outgoing_refs++; |
3157 | binder_delete_ref(ref); | |
3158 | } | |
53413e7d | 3159 | |
355b0502 | 3160 | binder_release_work(&proc->todo); |
675d66b0 | 3161 | binder_release_work(&proc->delivered_death); |
355b0502 | 3162 | |
19c98724 | 3163 | binder_alloc_deferred_release(&proc->alloc); |
355b0502 GKH |
3164 | binder_stats_deleted(BINDER_STAT_PROC); |
3165 | ||
355b0502 GKH |
3166 | put_task_struct(proc->tsk); |
3167 | ||
3168 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, | |
19c98724 | 3169 | "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d\n", |
c07c933f | 3170 | __func__, proc->pid, threads, nodes, incoming_refs, |
19c98724 | 3171 | outgoing_refs, active_transactions); |
355b0502 GKH |
3172 | |
3173 | kfree(proc); | |
3174 | } | |
3175 | ||
3176 | static void binder_deferred_func(struct work_struct *work) | |
3177 | { | |
3178 | struct binder_proc *proc; | |
3179 | struct files_struct *files; | |
3180 | ||
3181 | int defer; | |
10f62861 | 3182 | |
355b0502 | 3183 | do { |
975a1ac9 | 3184 | binder_lock(__func__); |
355b0502 GKH |
3185 | mutex_lock(&binder_deferred_lock); |
3186 | if (!hlist_empty(&binder_deferred_list)) { | |
3187 | proc = hlist_entry(binder_deferred_list.first, | |
3188 | struct binder_proc, deferred_work_node); | |
3189 | hlist_del_init(&proc->deferred_work_node); | |
3190 | defer = proc->deferred_work; | |
3191 | proc->deferred_work = 0; | |
3192 | } else { | |
3193 | proc = NULL; | |
3194 | defer = 0; | |
3195 | } | |
3196 | mutex_unlock(&binder_deferred_lock); | |
3197 | ||
3198 | files = NULL; | |
3199 | if (defer & BINDER_DEFERRED_PUT_FILES) { | |
3200 | files = proc->files; | |
3201 | if (files) | |
3202 | proc->files = NULL; | |
3203 | } | |
3204 | ||
3205 | if (defer & BINDER_DEFERRED_FLUSH) | |
3206 | binder_deferred_flush(proc); | |
3207 | ||
3208 | if (defer & BINDER_DEFERRED_RELEASE) | |
3209 | binder_deferred_release(proc); /* frees proc */ | |
3210 | ||
975a1ac9 | 3211 | binder_unlock(__func__); |
355b0502 GKH |
3212 | if (files) |
3213 | put_files_struct(files); | |
3214 | } while (proc); | |
3215 | } | |
3216 | static DECLARE_WORK(binder_deferred_work, binder_deferred_func); | |
3217 | ||
3218 | static void | |
3219 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer) | |
3220 | { | |
3221 | mutex_lock(&binder_deferred_lock); | |
3222 | proc->deferred_work |= defer; | |
3223 | if (hlist_unhashed(&proc->deferred_work_node)) { | |
3224 | hlist_add_head(&proc->deferred_work_node, | |
3225 | &binder_deferred_list); | |
1beba52d | 3226 | schedule_work(&binder_deferred_work); |
355b0502 GKH |
3227 | } |
3228 | mutex_unlock(&binder_deferred_lock); | |
3229 | } | |
3230 | ||
5249f488 AH |
3231 | static void print_binder_transaction(struct seq_file *m, const char *prefix, |
3232 | struct binder_transaction *t) | |
3233 | { | |
3234 | seq_printf(m, | |
3235 | "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d", | |
3236 | prefix, t->debug_id, t, | |
3237 | t->from ? t->from->proc->pid : 0, | |
3238 | t->from ? t->from->pid : 0, | |
3239 | t->to_proc ? t->to_proc->pid : 0, | |
3240 | t->to_thread ? t->to_thread->pid : 0, | |
3241 | t->code, t->flags, t->priority, t->need_reply); | |
355b0502 | 3242 | if (t->buffer == NULL) { |
5249f488 AH |
3243 | seq_puts(m, " buffer free\n"); |
3244 | return; | |
355b0502 | 3245 | } |
5249f488 AH |
3246 | if (t->buffer->target_node) |
3247 | seq_printf(m, " node %d", | |
3248 | t->buffer->target_node->debug_id); | |
3249 | seq_printf(m, " size %zd:%zd data %p\n", | |
3250 | t->buffer->data_size, t->buffer->offsets_size, | |
3251 | t->buffer->data); | |
355b0502 GKH |
3252 | } |
3253 | ||
5249f488 AH |
3254 | static void print_binder_work(struct seq_file *m, const char *prefix, |
3255 | const char *transaction_prefix, | |
3256 | struct binder_work *w) | |
355b0502 GKH |
3257 | { |
3258 | struct binder_node *node; | |
3259 | struct binder_transaction *t; | |
3260 | ||
3261 | switch (w->type) { | |
3262 | case BINDER_WORK_TRANSACTION: | |
3263 | t = container_of(w, struct binder_transaction, work); | |
5249f488 | 3264 | print_binder_transaction(m, transaction_prefix, t); |
355b0502 GKH |
3265 | break; |
3266 | case BINDER_WORK_TRANSACTION_COMPLETE: | |
5249f488 | 3267 | seq_printf(m, "%stransaction complete\n", prefix); |
355b0502 GKH |
3268 | break; |
3269 | case BINDER_WORK_NODE: | |
3270 | node = container_of(w, struct binder_node, work); | |
da49889d AH |
3271 | seq_printf(m, "%snode work %d: u%016llx c%016llx\n", |
3272 | prefix, node->debug_id, | |
3273 | (u64)node->ptr, (u64)node->cookie); | |
355b0502 GKH |
3274 | break; |
3275 | case BINDER_WORK_DEAD_BINDER: | |
5249f488 | 3276 | seq_printf(m, "%shas dead binder\n", prefix); |
355b0502 GKH |
3277 | break; |
3278 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: | |
5249f488 | 3279 | seq_printf(m, "%shas cleared dead binder\n", prefix); |
355b0502 GKH |
3280 | break; |
3281 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: | |
5249f488 | 3282 | seq_printf(m, "%shas cleared death notification\n", prefix); |
355b0502 GKH |
3283 | break; |
3284 | default: | |
5249f488 | 3285 | seq_printf(m, "%sunknown work: type %d\n", prefix, w->type); |
355b0502 GKH |
3286 | break; |
3287 | } | |
355b0502 GKH |
3288 | } |
3289 | ||
5249f488 AH |
3290 | static void print_binder_thread(struct seq_file *m, |
3291 | struct binder_thread *thread, | |
3292 | int print_always) | |
355b0502 GKH |
3293 | { |
3294 | struct binder_transaction *t; | |
3295 | struct binder_work *w; | |
5249f488 AH |
3296 | size_t start_pos = m->count; |
3297 | size_t header_pos; | |
355b0502 | 3298 | |
5249f488 AH |
3299 | seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper); |
3300 | header_pos = m->count; | |
355b0502 GKH |
3301 | t = thread->transaction_stack; |
3302 | while (t) { | |
355b0502 | 3303 | if (t->from == thread) { |
5249f488 AH |
3304 | print_binder_transaction(m, |
3305 | " outgoing transaction", t); | |
355b0502 GKH |
3306 | t = t->from_parent; |
3307 | } else if (t->to_thread == thread) { | |
5249f488 AH |
3308 | print_binder_transaction(m, |
3309 | " incoming transaction", t); | |
355b0502 GKH |
3310 | t = t->to_parent; |
3311 | } else { | |
5249f488 | 3312 | print_binder_transaction(m, " bad transaction", t); |
355b0502 GKH |
3313 | t = NULL; |
3314 | } | |
3315 | } | |
3316 | list_for_each_entry(w, &thread->todo, entry) { | |
5249f488 | 3317 | print_binder_work(m, " ", " pending transaction", w); |
355b0502 | 3318 | } |
5249f488 AH |
3319 | if (!print_always && m->count == header_pos) |
3320 | m->count = start_pos; | |
355b0502 GKH |
3321 | } |
3322 | ||
5249f488 | 3323 | static void print_binder_node(struct seq_file *m, struct binder_node *node) |
355b0502 GKH |
3324 | { |
3325 | struct binder_ref *ref; | |
355b0502 GKH |
3326 | struct binder_work *w; |
3327 | int count; | |
3328 | ||
3329 | count = 0; | |
b67bfe0d | 3330 | hlist_for_each_entry(ref, &node->refs, node_entry) |
355b0502 GKH |
3331 | count++; |
3332 | ||
da49889d AH |
3333 | seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d", |
3334 | node->debug_id, (u64)node->ptr, (u64)node->cookie, | |
5249f488 AH |
3335 | node->has_strong_ref, node->has_weak_ref, |
3336 | node->local_strong_refs, node->local_weak_refs, | |
3337 | node->internal_strong_refs, count); | |
355b0502 | 3338 | if (count) { |
5249f488 | 3339 | seq_puts(m, " proc"); |
b67bfe0d | 3340 | hlist_for_each_entry(ref, &node->refs, node_entry) |
5249f488 | 3341 | seq_printf(m, " %d", ref->proc->pid); |
355b0502 | 3342 | } |
5249f488 AH |
3343 | seq_puts(m, "\n"); |
3344 | list_for_each_entry(w, &node->async_todo, entry) | |
3345 | print_binder_work(m, " ", | |
3346 | " pending async transaction", w); | |
355b0502 GKH |
3347 | } |
3348 | ||
5249f488 | 3349 | static void print_binder_ref(struct seq_file *m, struct binder_ref *ref) |
355b0502 | 3350 | { |
5249f488 AH |
3351 | seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n", |
3352 | ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ", | |
3353 | ref->node->debug_id, ref->strong, ref->weak, ref->death); | |
355b0502 GKH |
3354 | } |
3355 | ||
5249f488 AH |
3356 | static void print_binder_proc(struct seq_file *m, |
3357 | struct binder_proc *proc, int print_all) | |
355b0502 GKH |
3358 | { |
3359 | struct binder_work *w; | |
3360 | struct rb_node *n; | |
5249f488 AH |
3361 | size_t start_pos = m->count; |
3362 | size_t header_pos; | |
3363 | ||
3364 | seq_printf(m, "proc %d\n", proc->pid); | |
14db3181 | 3365 | seq_printf(m, "context %s\n", proc->context->name); |
5249f488 AH |
3366 | header_pos = m->count; |
3367 | ||
3368 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) | |
3369 | print_binder_thread(m, rb_entry(n, struct binder_thread, | |
3370 | rb_node), print_all); | |
3371 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) { | |
355b0502 GKH |
3372 | struct binder_node *node = rb_entry(n, struct binder_node, |
3373 | rb_node); | |
3374 | if (print_all || node->has_async_transaction) | |
5249f488 | 3375 | print_binder_node(m, node); |
355b0502 GKH |
3376 | } |
3377 | if (print_all) { | |
3378 | for (n = rb_first(&proc->refs_by_desc); | |
5249f488 | 3379 | n != NULL; |
355b0502 | 3380 | n = rb_next(n)) |
5249f488 AH |
3381 | print_binder_ref(m, rb_entry(n, struct binder_ref, |
3382 | rb_node_desc)); | |
355b0502 | 3383 | } |
19c98724 | 3384 | binder_alloc_print_allocated(m, &proc->alloc); |
5249f488 AH |
3385 | list_for_each_entry(w, &proc->todo, entry) |
3386 | print_binder_work(m, " ", " pending transaction", w); | |
355b0502 | 3387 | list_for_each_entry(w, &proc->delivered_death, entry) { |
5249f488 | 3388 | seq_puts(m, " has delivered dead binder\n"); |
355b0502 GKH |
3389 | break; |
3390 | } | |
5249f488 AH |
3391 | if (!print_all && m->count == header_pos) |
3392 | m->count = start_pos; | |
355b0502 GKH |
3393 | } |
3394 | ||
167bccbd | 3395 | static const char * const binder_return_strings[] = { |
355b0502 GKH |
3396 | "BR_ERROR", |
3397 | "BR_OK", | |
3398 | "BR_TRANSACTION", | |
3399 | "BR_REPLY", | |
3400 | "BR_ACQUIRE_RESULT", | |
3401 | "BR_DEAD_REPLY", | |
3402 | "BR_TRANSACTION_COMPLETE", | |
3403 | "BR_INCREFS", | |
3404 | "BR_ACQUIRE", | |
3405 | "BR_RELEASE", | |
3406 | "BR_DECREFS", | |
3407 | "BR_ATTEMPT_ACQUIRE", | |
3408 | "BR_NOOP", | |
3409 | "BR_SPAWN_LOOPER", | |
3410 | "BR_FINISHED", | |
3411 | "BR_DEAD_BINDER", | |
3412 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", | |
3413 | "BR_FAILED_REPLY" | |
3414 | }; | |
3415 | ||
167bccbd | 3416 | static const char * const binder_command_strings[] = { |
355b0502 GKH |
3417 | "BC_TRANSACTION", |
3418 | "BC_REPLY", | |
3419 | "BC_ACQUIRE_RESULT", | |
3420 | "BC_FREE_BUFFER", | |
3421 | "BC_INCREFS", | |
3422 | "BC_ACQUIRE", | |
3423 | "BC_RELEASE", | |
3424 | "BC_DECREFS", | |
3425 | "BC_INCREFS_DONE", | |
3426 | "BC_ACQUIRE_DONE", | |
3427 | "BC_ATTEMPT_ACQUIRE", | |
3428 | "BC_REGISTER_LOOPER", | |
3429 | "BC_ENTER_LOOPER", | |
3430 | "BC_EXIT_LOOPER", | |
3431 | "BC_REQUEST_DEATH_NOTIFICATION", | |
3432 | "BC_CLEAR_DEATH_NOTIFICATION", | |
7980240b MC |
3433 | "BC_DEAD_BINDER_DONE", |
3434 | "BC_TRANSACTION_SG", | |
3435 | "BC_REPLY_SG", | |
355b0502 GKH |
3436 | }; |
3437 | ||
167bccbd | 3438 | static const char * const binder_objstat_strings[] = { |
355b0502 GKH |
3439 | "proc", |
3440 | "thread", | |
3441 | "node", | |
3442 | "ref", | |
3443 | "death", | |
3444 | "transaction", | |
3445 | "transaction_complete" | |
3446 | }; | |
3447 | ||
5249f488 AH |
3448 | static void print_binder_stats(struct seq_file *m, const char *prefix, |
3449 | struct binder_stats *stats) | |
355b0502 GKH |
3450 | { |
3451 | int i; | |
3452 | ||
3453 | BUILD_BUG_ON(ARRAY_SIZE(stats->bc) != | |
5249f488 | 3454 | ARRAY_SIZE(binder_command_strings)); |
355b0502 | 3455 | for (i = 0; i < ARRAY_SIZE(stats->bc); i++) { |
0953c797 BJS |
3456 | int temp = atomic_read(&stats->bc[i]); |
3457 | ||
3458 | if (temp) | |
5249f488 | 3459 | seq_printf(m, "%s%s: %d\n", prefix, |
0953c797 | 3460 | binder_command_strings[i], temp); |
355b0502 GKH |
3461 | } |
3462 | ||
3463 | BUILD_BUG_ON(ARRAY_SIZE(stats->br) != | |
5249f488 | 3464 | ARRAY_SIZE(binder_return_strings)); |
355b0502 | 3465 | for (i = 0; i < ARRAY_SIZE(stats->br); i++) { |
0953c797 BJS |
3466 | int temp = atomic_read(&stats->br[i]); |
3467 | ||
3468 | if (temp) | |
5249f488 | 3469 | seq_printf(m, "%s%s: %d\n", prefix, |
0953c797 | 3470 | binder_return_strings[i], temp); |
355b0502 GKH |
3471 | } |
3472 | ||
3473 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != | |
5249f488 | 3474 | ARRAY_SIZE(binder_objstat_strings)); |
355b0502 | 3475 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != |
5249f488 | 3476 | ARRAY_SIZE(stats->obj_deleted)); |
355b0502 | 3477 | for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) { |
0953c797 BJS |
3478 | int created = atomic_read(&stats->obj_created[i]); |
3479 | int deleted = atomic_read(&stats->obj_deleted[i]); | |
3480 | ||
3481 | if (created || deleted) | |
3482 | seq_printf(m, "%s%s: active %d total %d\n", | |
3483 | prefix, | |
5249f488 | 3484 | binder_objstat_strings[i], |
0953c797 BJS |
3485 | created - deleted, |
3486 | created); | |
355b0502 | 3487 | } |
355b0502 GKH |
3488 | } |
3489 | ||
5249f488 AH |
3490 | static void print_binder_proc_stats(struct seq_file *m, |
3491 | struct binder_proc *proc) | |
355b0502 GKH |
3492 | { |
3493 | struct binder_work *w; | |
3494 | struct rb_node *n; | |
3495 | int count, strong, weak; | |
3496 | ||
5249f488 | 3497 | seq_printf(m, "proc %d\n", proc->pid); |
14db3181 | 3498 | seq_printf(m, "context %s\n", proc->context->name); |
355b0502 GKH |
3499 | count = 0; |
3500 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) | |
3501 | count++; | |
5249f488 AH |
3502 | seq_printf(m, " threads: %d\n", count); |
3503 | seq_printf(m, " requested threads: %d+%d/%d\n" | |
355b0502 GKH |
3504 | " ready threads %d\n" |
3505 | " free async space %zd\n", proc->requested_threads, | |
3506 | proc->requested_threads_started, proc->max_threads, | |
19c98724 TK |
3507 | proc->ready_threads, |
3508 | binder_alloc_get_free_async_space(&proc->alloc)); | |
355b0502 GKH |
3509 | count = 0; |
3510 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) | |
3511 | count++; | |
5249f488 | 3512 | seq_printf(m, " nodes: %d\n", count); |
355b0502 GKH |
3513 | count = 0; |
3514 | strong = 0; | |
3515 | weak = 0; | |
3516 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { | |
3517 | struct binder_ref *ref = rb_entry(n, struct binder_ref, | |
3518 | rb_node_desc); | |
3519 | count++; | |
3520 | strong += ref->strong; | |
3521 | weak += ref->weak; | |
3522 | } | |
5249f488 | 3523 | seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak); |
355b0502 | 3524 | |
19c98724 | 3525 | count = binder_alloc_get_allocated_count(&proc->alloc); |
5249f488 | 3526 | seq_printf(m, " buffers: %d\n", count); |
355b0502 GKH |
3527 | |
3528 | count = 0; | |
3529 | list_for_each_entry(w, &proc->todo, entry) { | |
3530 | switch (w->type) { | |
3531 | case BINDER_WORK_TRANSACTION: | |
3532 | count++; | |
3533 | break; | |
3534 | default: | |
3535 | break; | |
3536 | } | |
3537 | } | |
5249f488 | 3538 | seq_printf(m, " pending transactions: %d\n", count); |
355b0502 | 3539 | |
5249f488 | 3540 | print_binder_stats(m, " ", &proc->stats); |
355b0502 GKH |
3541 | } |
3542 | ||
3543 | ||
5249f488 | 3544 | static int binder_state_show(struct seq_file *m, void *unused) |
355b0502 GKH |
3545 | { |
3546 | struct binder_proc *proc; | |
355b0502 | 3547 | struct binder_node *node; |
355b0502 | 3548 | |
1cf29cf4 | 3549 | binder_lock(__func__); |
355b0502 | 3550 | |
5249f488 | 3551 | seq_puts(m, "binder state:\n"); |
355b0502 | 3552 | |
c44b1231 | 3553 | spin_lock(&binder_dead_nodes_lock); |
355b0502 | 3554 | if (!hlist_empty(&binder_dead_nodes)) |
5249f488 | 3555 | seq_puts(m, "dead nodes:\n"); |
b67bfe0d | 3556 | hlist_for_each_entry(node, &binder_dead_nodes, dead_node) |
5249f488 | 3557 | print_binder_node(m, node); |
c44b1231 | 3558 | spin_unlock(&binder_dead_nodes_lock); |
355b0502 | 3559 | |
c44b1231 | 3560 | mutex_lock(&binder_procs_lock); |
b67bfe0d | 3561 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
5249f488 | 3562 | print_binder_proc(m, proc, 1); |
c44b1231 | 3563 | mutex_unlock(&binder_procs_lock); |
1cf29cf4 | 3564 | binder_unlock(__func__); |
5249f488 | 3565 | return 0; |
355b0502 GKH |
3566 | } |
3567 | ||
5249f488 | 3568 | static int binder_stats_show(struct seq_file *m, void *unused) |
355b0502 GKH |
3569 | { |
3570 | struct binder_proc *proc; | |
355b0502 | 3571 | |
1cf29cf4 | 3572 | binder_lock(__func__); |
355b0502 | 3573 | |
5249f488 | 3574 | seq_puts(m, "binder stats:\n"); |
355b0502 | 3575 | |
5249f488 | 3576 | print_binder_stats(m, "", &binder_stats); |
355b0502 | 3577 | |
c44b1231 | 3578 | mutex_lock(&binder_procs_lock); |
b67bfe0d | 3579 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
5249f488 | 3580 | print_binder_proc_stats(m, proc); |
c44b1231 | 3581 | mutex_unlock(&binder_procs_lock); |
1cf29cf4 | 3582 | binder_unlock(__func__); |
5249f488 | 3583 | return 0; |
355b0502 GKH |
3584 | } |
3585 | ||
5249f488 | 3586 | static int binder_transactions_show(struct seq_file *m, void *unused) |
355b0502 GKH |
3587 | { |
3588 | struct binder_proc *proc; | |
355b0502 | 3589 | |
1cf29cf4 | 3590 | binder_lock(__func__); |
355b0502 | 3591 | |
5249f488 | 3592 | seq_puts(m, "binder transactions:\n"); |
c44b1231 | 3593 | mutex_lock(&binder_procs_lock); |
b67bfe0d | 3594 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
5249f488 | 3595 | print_binder_proc(m, proc, 0); |
c44b1231 | 3596 | mutex_unlock(&binder_procs_lock); |
1cf29cf4 | 3597 | binder_unlock(__func__); |
5249f488 | 3598 | return 0; |
355b0502 GKH |
3599 | } |
3600 | ||
5249f488 | 3601 | static int binder_proc_show(struct seq_file *m, void *unused) |
355b0502 | 3602 | { |
83050a4e | 3603 | struct binder_proc *itr; |
14db3181 | 3604 | int pid = (unsigned long)m->private; |
355b0502 | 3605 | |
1cf29cf4 | 3606 | binder_lock(__func__); |
83050a4e | 3607 | |
c44b1231 | 3608 | mutex_lock(&binder_procs_lock); |
83050a4e | 3609 | hlist_for_each_entry(itr, &binder_procs, proc_node) { |
14db3181 MC |
3610 | if (itr->pid == pid) { |
3611 | seq_puts(m, "binder proc state:\n"); | |
3612 | print_binder_proc(m, itr, 1); | |
83050a4e RA |
3613 | } |
3614 | } | |
c44b1231 TK |
3615 | mutex_unlock(&binder_procs_lock); |
3616 | ||
1cf29cf4 | 3617 | binder_unlock(__func__); |
5249f488 | 3618 | return 0; |
355b0502 GKH |
3619 | } |
3620 | ||
5249f488 | 3621 | static void print_binder_transaction_log_entry(struct seq_file *m, |
355b0502 GKH |
3622 | struct binder_transaction_log_entry *e) |
3623 | { | |
5249f488 | 3624 | seq_printf(m, |
14db3181 | 3625 | "%d: %s from %d:%d to %d:%d context %s node %d handle %d size %d:%d\n", |
5249f488 AH |
3626 | e->debug_id, (e->call_type == 2) ? "reply" : |
3627 | ((e->call_type == 1) ? "async" : "call "), e->from_proc, | |
14db3181 MC |
3628 | e->from_thread, e->to_proc, e->to_thread, e->context_name, |
3629 | e->to_node, e->target_handle, e->data_size, e->offsets_size); | |
355b0502 GKH |
3630 | } |
3631 | ||
5249f488 | 3632 | static int binder_transaction_log_show(struct seq_file *m, void *unused) |
355b0502 | 3633 | { |
5249f488 | 3634 | struct binder_transaction_log *log = m->private; |
355b0502 | 3635 | int i; |
355b0502 GKH |
3636 | |
3637 | if (log->full) { | |
5249f488 AH |
3638 | for (i = log->next; i < ARRAY_SIZE(log->entry); i++) |
3639 | print_binder_transaction_log_entry(m, &log->entry[i]); | |
355b0502 | 3640 | } |
5249f488 AH |
3641 | for (i = 0; i < log->next; i++) |
3642 | print_binder_transaction_log_entry(m, &log->entry[i]); | |
3643 | return 0; | |
355b0502 GKH |
3644 | } |
3645 | ||
3646 | static const struct file_operations binder_fops = { | |
3647 | .owner = THIS_MODULE, | |
3648 | .poll = binder_poll, | |
3649 | .unlocked_ioctl = binder_ioctl, | |
da49889d | 3650 | .compat_ioctl = binder_ioctl, |
355b0502 GKH |
3651 | .mmap = binder_mmap, |
3652 | .open = binder_open, | |
3653 | .flush = binder_flush, | |
3654 | .release = binder_release, | |
3655 | }; | |
3656 | ||
5249f488 AH |
3657 | BINDER_DEBUG_ENTRY(state); |
3658 | BINDER_DEBUG_ENTRY(stats); | |
3659 | BINDER_DEBUG_ENTRY(transactions); | |
3660 | BINDER_DEBUG_ENTRY(transaction_log); | |
3661 | ||
ac4812c5 MC |
3662 | static int __init init_binder_device(const char *name) |
3663 | { | |
3664 | int ret; | |
3665 | struct binder_device *binder_device; | |
3666 | ||
3667 | binder_device = kzalloc(sizeof(*binder_device), GFP_KERNEL); | |
3668 | if (!binder_device) | |
3669 | return -ENOMEM; | |
3670 | ||
3671 | binder_device->miscdev.fops = &binder_fops; | |
3672 | binder_device->miscdev.minor = MISC_DYNAMIC_MINOR; | |
3673 | binder_device->miscdev.name = name; | |
3674 | ||
3675 | binder_device->context.binder_context_mgr_uid = INVALID_UID; | |
3676 | binder_device->context.name = name; | |
c44b1231 | 3677 | mutex_init(&binder_device->context.context_mgr_node_lock); |
ac4812c5 MC |
3678 | |
3679 | ret = misc_register(&binder_device->miscdev); | |
3680 | if (ret < 0) { | |
3681 | kfree(binder_device); | |
3682 | return ret; | |
3683 | } | |
3684 | ||
3685 | hlist_add_head(&binder_device->hlist, &binder_devices); | |
3686 | ||
3687 | return ret; | |
3688 | } | |
3689 | ||
355b0502 GKH |
3690 | static int __init binder_init(void) |
3691 | { | |
3692 | int ret; | |
ac4812c5 MC |
3693 | char *device_name, *device_names; |
3694 | struct binder_device *device; | |
3695 | struct hlist_node *tmp; | |
355b0502 | 3696 | |
16b66554 AH |
3697 | binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL); |
3698 | if (binder_debugfs_dir_entry_root) | |
3699 | binder_debugfs_dir_entry_proc = debugfs_create_dir("proc", | |
3700 | binder_debugfs_dir_entry_root); | |
ac4812c5 | 3701 | |
16b66554 AH |
3702 | if (binder_debugfs_dir_entry_root) { |
3703 | debugfs_create_file("state", | |
3704 | S_IRUGO, | |
3705 | binder_debugfs_dir_entry_root, | |
3706 | NULL, | |
3707 | &binder_state_fops); | |
3708 | debugfs_create_file("stats", | |
3709 | S_IRUGO, | |
3710 | binder_debugfs_dir_entry_root, | |
3711 | NULL, | |
3712 | &binder_stats_fops); | |
3713 | debugfs_create_file("transactions", | |
3714 | S_IRUGO, | |
3715 | binder_debugfs_dir_entry_root, | |
3716 | NULL, | |
3717 | &binder_transactions_fops); | |
3718 | debugfs_create_file("transaction_log", | |
3719 | S_IRUGO, | |
3720 | binder_debugfs_dir_entry_root, | |
3721 | &binder_transaction_log, | |
3722 | &binder_transaction_log_fops); | |
3723 | debugfs_create_file("failed_transaction_log", | |
3724 | S_IRUGO, | |
3725 | binder_debugfs_dir_entry_root, | |
3726 | &binder_transaction_log_failed, | |
3727 | &binder_transaction_log_fops); | |
355b0502 | 3728 | } |
ac4812c5 MC |
3729 | |
3730 | /* | |
3731 | * Copy the module_parameter string, because we don't want to | |
3732 | * tokenize it in-place. | |
3733 | */ | |
3734 | device_names = kzalloc(strlen(binder_devices_param) + 1, GFP_KERNEL); | |
3735 | if (!device_names) { | |
3736 | ret = -ENOMEM; | |
3737 | goto err_alloc_device_names_failed; | |
3738 | } | |
3739 | strcpy(device_names, binder_devices_param); | |
3740 | ||
3741 | while ((device_name = strsep(&device_names, ","))) { | |
3742 | ret = init_binder_device(device_name); | |
3743 | if (ret) | |
3744 | goto err_init_binder_device_failed; | |
3745 | } | |
3746 | ||
3747 | return ret; | |
3748 | ||
3749 | err_init_binder_device_failed: | |
3750 | hlist_for_each_entry_safe(device, tmp, &binder_devices, hlist) { | |
3751 | misc_deregister(&device->miscdev); | |
3752 | hlist_del(&device->hlist); | |
3753 | kfree(device); | |
3754 | } | |
3755 | err_alloc_device_names_failed: | |
3756 | debugfs_remove_recursive(binder_debugfs_dir_entry_root); | |
3757 | ||
355b0502 GKH |
3758 | return ret; |
3759 | } | |
3760 | ||
3761 | device_initcall(binder_init); | |
3762 | ||
975a1ac9 AH |
3763 | #define CREATE_TRACE_POINTS |
3764 | #include "binder_trace.h" | |
3765 | ||
355b0502 | 3766 | MODULE_LICENSE("GPL v2"); |