Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 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 | |
| 18 | #include <asm/cacheflush.h> |
| 19 | #include <linux/fdtable.h> |
| 20 | #include <linux/file.h> |
| 21 | #include <linux/fs.h> |
| 22 | #include <linux/list.h> |
| 23 | #include <linux/miscdevice.h> |
| 24 | #include <linux/mm.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/mutex.h> |
| 27 | #include <linux/nsproxy.h> |
| 28 | #include <linux/poll.h> |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 29 | #include <linux/debugfs.h> |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 30 | #include <linux/rbtree.h> |
| 31 | #include <linux/sched.h> |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 32 | #include <linux/seq_file.h> |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 33 | #include <linux/uaccess.h> |
| 34 | #include <linux/vmalloc.h> |
Colin Cross | c11a166 | 2010-04-15 15:21:51 -0700 | [diff] [blame] | 35 | #include <linux/slab.h> |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 36 | |
| 37 | #include "binder.h" |
| 38 | |
| 39 | static DEFINE_MUTEX(binder_lock); |
| 40 | static DEFINE_MUTEX(binder_deferred_lock); |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 41 | static DEFINE_MUTEX(binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 42 | |
| 43 | static HLIST_HEAD(binder_procs); |
| 44 | static HLIST_HEAD(binder_deferred_list); |
| 45 | static HLIST_HEAD(binder_dead_nodes); |
| 46 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 47 | static struct dentry *binder_debugfs_dir_entry_root; |
| 48 | static struct dentry *binder_debugfs_dir_entry_proc; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 49 | static struct binder_node *binder_context_mgr_node; |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 50 | static kuid_t binder_context_mgr_uid = INVALID_UID; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 51 | static int binder_last_id; |
Arve Hjønnevåg | 3c762a4 | 2010-04-22 15:53:23 -0700 | [diff] [blame] | 52 | static struct workqueue_struct *binder_deferred_workqueue; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 53 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 54 | #define BINDER_DEBUG_ENTRY(name) \ |
| 55 | static int binder_##name##_open(struct inode *inode, struct file *file) \ |
| 56 | { \ |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 57 | return single_open(file, binder_##name##_show, inode->i_private); \ |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 58 | } \ |
| 59 | \ |
| 60 | static const struct file_operations binder_##name##_fops = { \ |
| 61 | .owner = THIS_MODULE, \ |
| 62 | .open = binder_##name##_open, \ |
| 63 | .read = seq_read, \ |
| 64 | .llseek = seq_lseek, \ |
| 65 | .release = single_release, \ |
| 66 | } |
| 67 | |
| 68 | static int binder_proc_show(struct seq_file *m, void *unused); |
| 69 | BINDER_DEBUG_ENTRY(proc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 70 | |
| 71 | /* This is only defined in include/asm-arm/sizes.h */ |
| 72 | #ifndef SZ_1K |
| 73 | #define SZ_1K 0x400 |
| 74 | #endif |
| 75 | |
| 76 | #ifndef SZ_4M |
| 77 | #define SZ_4M 0x400000 |
| 78 | #endif |
| 79 | |
| 80 | #define FORBIDDEN_MMAP_FLAGS (VM_WRITE) |
| 81 | |
| 82 | #define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64) |
| 83 | |
| 84 | enum { |
| 85 | BINDER_DEBUG_USER_ERROR = 1U << 0, |
| 86 | BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1, |
| 87 | BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2, |
| 88 | BINDER_DEBUG_OPEN_CLOSE = 1U << 3, |
| 89 | BINDER_DEBUG_DEAD_BINDER = 1U << 4, |
| 90 | BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5, |
| 91 | BINDER_DEBUG_READ_WRITE = 1U << 6, |
| 92 | BINDER_DEBUG_USER_REFS = 1U << 7, |
| 93 | BINDER_DEBUG_THREADS = 1U << 8, |
| 94 | BINDER_DEBUG_TRANSACTION = 1U << 9, |
| 95 | BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10, |
| 96 | BINDER_DEBUG_FREE_BUFFER = 1U << 11, |
| 97 | BINDER_DEBUG_INTERNAL_REFS = 1U << 12, |
| 98 | BINDER_DEBUG_BUFFER_ALLOC = 1U << 13, |
| 99 | BINDER_DEBUG_PRIORITY_CAP = 1U << 14, |
| 100 | BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15, |
| 101 | }; |
| 102 | static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR | |
| 103 | BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION; |
| 104 | module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO); |
| 105 | |
Zhengwang Ruan | 2c52325 | 2012-03-07 10:36:57 +0800 | [diff] [blame] | 106 | static bool binder_debug_no_lock; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 107 | module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO); |
| 108 | |
| 109 | static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait); |
| 110 | static int binder_stop_on_user_error; |
| 111 | |
| 112 | static int binder_set_stop_on_user_error(const char *val, |
| 113 | struct kernel_param *kp) |
| 114 | { |
| 115 | int ret; |
| 116 | ret = param_set_int(val, kp); |
| 117 | if (binder_stop_on_user_error < 2) |
| 118 | wake_up(&binder_user_error_wait); |
| 119 | return ret; |
| 120 | } |
| 121 | module_param_call(stop_on_user_error, binder_set_stop_on_user_error, |
| 122 | param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO); |
| 123 | |
| 124 | #define binder_debug(mask, x...) \ |
| 125 | do { \ |
| 126 | if (binder_debug_mask & mask) \ |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 127 | pr_info(x); \ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 128 | } while (0) |
| 129 | |
| 130 | #define binder_user_error(x...) \ |
| 131 | do { \ |
| 132 | if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \ |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 133 | pr_info(x); \ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 134 | if (binder_stop_on_user_error) \ |
| 135 | binder_stop_on_user_error = 2; \ |
| 136 | } while (0) |
| 137 | |
| 138 | enum binder_stat_types { |
| 139 | BINDER_STAT_PROC, |
| 140 | BINDER_STAT_THREAD, |
| 141 | BINDER_STAT_NODE, |
| 142 | BINDER_STAT_REF, |
| 143 | BINDER_STAT_DEATH, |
| 144 | BINDER_STAT_TRANSACTION, |
| 145 | BINDER_STAT_TRANSACTION_COMPLETE, |
| 146 | BINDER_STAT_COUNT |
| 147 | }; |
| 148 | |
| 149 | struct binder_stats { |
| 150 | int br[_IOC_NR(BR_FAILED_REPLY) + 1]; |
| 151 | int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1]; |
| 152 | int obj_created[BINDER_STAT_COUNT]; |
| 153 | int obj_deleted[BINDER_STAT_COUNT]; |
| 154 | }; |
| 155 | |
| 156 | static struct binder_stats binder_stats; |
| 157 | |
| 158 | static inline void binder_stats_deleted(enum binder_stat_types type) |
| 159 | { |
| 160 | binder_stats.obj_deleted[type]++; |
| 161 | } |
| 162 | |
| 163 | static inline void binder_stats_created(enum binder_stat_types type) |
| 164 | { |
| 165 | binder_stats.obj_created[type]++; |
| 166 | } |
| 167 | |
| 168 | struct binder_transaction_log_entry { |
| 169 | int debug_id; |
| 170 | int call_type; |
| 171 | int from_proc; |
| 172 | int from_thread; |
| 173 | int target_handle; |
| 174 | int to_proc; |
| 175 | int to_thread; |
| 176 | int to_node; |
| 177 | int data_size; |
| 178 | int offsets_size; |
| 179 | }; |
| 180 | struct binder_transaction_log { |
| 181 | int next; |
| 182 | int full; |
| 183 | struct binder_transaction_log_entry entry[32]; |
| 184 | }; |
| 185 | static struct binder_transaction_log binder_transaction_log; |
| 186 | static struct binder_transaction_log binder_transaction_log_failed; |
| 187 | |
| 188 | static struct binder_transaction_log_entry *binder_transaction_log_add( |
| 189 | struct binder_transaction_log *log) |
| 190 | { |
| 191 | struct binder_transaction_log_entry *e; |
| 192 | e = &log->entry[log->next]; |
| 193 | memset(e, 0, sizeof(*e)); |
| 194 | log->next++; |
| 195 | if (log->next == ARRAY_SIZE(log->entry)) { |
| 196 | log->next = 0; |
| 197 | log->full = 1; |
| 198 | } |
| 199 | return e; |
| 200 | } |
| 201 | |
| 202 | struct binder_work { |
| 203 | struct list_head entry; |
| 204 | enum { |
| 205 | BINDER_WORK_TRANSACTION = 1, |
| 206 | BINDER_WORK_TRANSACTION_COMPLETE, |
| 207 | BINDER_WORK_NODE, |
| 208 | BINDER_WORK_DEAD_BINDER, |
| 209 | BINDER_WORK_DEAD_BINDER_AND_CLEAR, |
| 210 | BINDER_WORK_CLEAR_DEATH_NOTIFICATION, |
| 211 | } type; |
| 212 | }; |
| 213 | |
| 214 | struct binder_node { |
| 215 | int debug_id; |
| 216 | struct binder_work work; |
| 217 | union { |
| 218 | struct rb_node rb_node; |
| 219 | struct hlist_node dead_node; |
| 220 | }; |
| 221 | struct binder_proc *proc; |
| 222 | struct hlist_head refs; |
| 223 | int internal_strong_refs; |
| 224 | int local_weak_refs; |
| 225 | int local_strong_refs; |
| 226 | void __user *ptr; |
| 227 | void __user *cookie; |
| 228 | unsigned has_strong_ref:1; |
| 229 | unsigned pending_strong_ref:1; |
| 230 | unsigned has_weak_ref:1; |
| 231 | unsigned pending_weak_ref:1; |
| 232 | unsigned has_async_transaction:1; |
| 233 | unsigned accept_fds:1; |
| 234 | unsigned min_priority:8; |
| 235 | struct list_head async_todo; |
| 236 | }; |
| 237 | |
| 238 | struct binder_ref_death { |
| 239 | struct binder_work work; |
| 240 | void __user *cookie; |
| 241 | }; |
| 242 | |
| 243 | struct binder_ref { |
| 244 | /* Lookups needed: */ |
| 245 | /* node + proc => ref (transaction) */ |
| 246 | /* desc + proc => ref (transaction, inc/dec ref) */ |
| 247 | /* node => refs + procs (proc exit) */ |
| 248 | int debug_id; |
| 249 | struct rb_node rb_node_desc; |
| 250 | struct rb_node rb_node_node; |
| 251 | struct hlist_node node_entry; |
| 252 | struct binder_proc *proc; |
| 253 | struct binder_node *node; |
| 254 | uint32_t desc; |
| 255 | int strong; |
| 256 | int weak; |
| 257 | struct binder_ref_death *death; |
| 258 | }; |
| 259 | |
| 260 | struct binder_buffer { |
Justin P. Mattock | 217218f | 2012-01-12 06:51:31 -0800 | [diff] [blame] | 261 | struct list_head entry; /* free and allocated entries by address */ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 262 | struct rb_node rb_node; /* free entry by size or allocated entry */ |
| 263 | /* by address */ |
| 264 | unsigned free:1; |
| 265 | unsigned allow_user_free:1; |
| 266 | unsigned async_transaction:1; |
| 267 | unsigned debug_id:29; |
| 268 | |
| 269 | struct binder_transaction *transaction; |
| 270 | |
| 271 | struct binder_node *target_node; |
| 272 | size_t data_size; |
| 273 | size_t offsets_size; |
| 274 | uint8_t data[0]; |
| 275 | }; |
| 276 | |
| 277 | enum binder_deferred_state { |
| 278 | BINDER_DEFERRED_PUT_FILES = 0x01, |
| 279 | BINDER_DEFERRED_FLUSH = 0x02, |
| 280 | BINDER_DEFERRED_RELEASE = 0x04, |
| 281 | }; |
| 282 | |
| 283 | struct binder_proc { |
| 284 | struct hlist_node proc_node; |
| 285 | struct rb_root threads; |
| 286 | struct rb_root nodes; |
| 287 | struct rb_root refs_by_desc; |
| 288 | struct rb_root refs_by_node; |
| 289 | int pid; |
| 290 | struct vm_area_struct *vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 291 | struct mm_struct *vma_vm_mm; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 292 | struct task_struct *tsk; |
| 293 | struct files_struct *files; |
| 294 | struct hlist_node deferred_work_node; |
| 295 | int deferred_work; |
| 296 | void *buffer; |
| 297 | ptrdiff_t user_buffer_offset; |
| 298 | |
| 299 | struct list_head buffers; |
| 300 | struct rb_root free_buffers; |
| 301 | struct rb_root allocated_buffers; |
| 302 | size_t free_async_space; |
| 303 | |
| 304 | struct page **pages; |
| 305 | size_t buffer_size; |
| 306 | uint32_t buffer_free; |
| 307 | struct list_head todo; |
| 308 | wait_queue_head_t wait; |
| 309 | struct binder_stats stats; |
| 310 | struct list_head delivered_death; |
| 311 | int max_threads; |
| 312 | int requested_threads; |
| 313 | int requested_threads_started; |
| 314 | int ready_threads; |
| 315 | long default_priority; |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 316 | struct dentry *debugfs_entry; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 317 | }; |
| 318 | |
| 319 | enum { |
| 320 | BINDER_LOOPER_STATE_REGISTERED = 0x01, |
| 321 | BINDER_LOOPER_STATE_ENTERED = 0x02, |
| 322 | BINDER_LOOPER_STATE_EXITED = 0x04, |
| 323 | BINDER_LOOPER_STATE_INVALID = 0x08, |
| 324 | BINDER_LOOPER_STATE_WAITING = 0x10, |
| 325 | BINDER_LOOPER_STATE_NEED_RETURN = 0x20 |
| 326 | }; |
| 327 | |
| 328 | struct binder_thread { |
| 329 | struct binder_proc *proc; |
| 330 | struct rb_node rb_node; |
| 331 | int pid; |
| 332 | int looper; |
| 333 | struct binder_transaction *transaction_stack; |
| 334 | struct list_head todo; |
| 335 | uint32_t return_error; /* Write failed, return error code in read buf */ |
| 336 | uint32_t return_error2; /* Write failed, return error code in read */ |
| 337 | /* buffer. Used when sending a reply to a dead process that */ |
| 338 | /* we are also waiting on */ |
| 339 | wait_queue_head_t wait; |
| 340 | struct binder_stats stats; |
| 341 | }; |
| 342 | |
| 343 | struct binder_transaction { |
| 344 | int debug_id; |
| 345 | struct binder_work work; |
| 346 | struct binder_thread *from; |
| 347 | struct binder_transaction *from_parent; |
| 348 | struct binder_proc *to_proc; |
| 349 | struct binder_thread *to_thread; |
| 350 | struct binder_transaction *to_parent; |
| 351 | unsigned need_reply:1; |
| 352 | /* unsigned is_dead:1; */ /* not used at the moment */ |
| 353 | |
| 354 | struct binder_buffer *buffer; |
| 355 | unsigned int code; |
| 356 | unsigned int flags; |
| 357 | long priority; |
| 358 | long saved_priority; |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 359 | kuid_t sender_euid; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 360 | }; |
| 361 | |
| 362 | static void |
| 363 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer); |
| 364 | |
Sachin Kamat | efde99c | 2012-08-17 16:39:36 +0530 | [diff] [blame] | 365 | static int task_get_unused_fd_flags(struct binder_proc *proc, int flags) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 366 | { |
| 367 | struct files_struct *files = proc->files; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 368 | unsigned long rlim_cur; |
| 369 | unsigned long irqs; |
| 370 | |
| 371 | if (files == NULL) |
| 372 | return -ESRCH; |
| 373 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 374 | if (!lock_task_sighand(proc->tsk, &irqs)) |
| 375 | return -EMFILE; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 376 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 377 | rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE); |
| 378 | unlock_task_sighand(proc->tsk, &irqs); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 379 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 380 | return __alloc_fd(files, 0, rlim_cur, flags); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | /* |
| 384 | * copied from fd_install |
| 385 | */ |
| 386 | static void task_fd_install( |
| 387 | struct binder_proc *proc, unsigned int fd, struct file *file) |
| 388 | { |
Al Viro | f869e8a | 2012-08-15 21:06:33 -0400 | [diff] [blame] | 389 | if (proc->files) |
| 390 | __fd_install(proc->files, fd, file); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | /* |
| 394 | * copied from sys_close |
| 395 | */ |
| 396 | static long task_close_fd(struct binder_proc *proc, unsigned int fd) |
| 397 | { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 398 | int retval; |
| 399 | |
Al Viro | 483ce1d | 2012-08-19 12:04:24 -0400 | [diff] [blame] | 400 | if (proc->files == NULL) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 401 | return -ESRCH; |
| 402 | |
Al Viro | 483ce1d | 2012-08-19 12:04:24 -0400 | [diff] [blame] | 403 | retval = __close_fd(proc->files, fd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 404 | /* can't restart close syscall because file table entry was cleared */ |
| 405 | if (unlikely(retval == -ERESTARTSYS || |
| 406 | retval == -ERESTARTNOINTR || |
| 407 | retval == -ERESTARTNOHAND || |
| 408 | retval == -ERESTART_RESTARTBLOCK)) |
| 409 | retval = -EINTR; |
| 410 | |
| 411 | return retval; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | static void binder_set_nice(long nice) |
| 415 | { |
| 416 | long min_nice; |
| 417 | if (can_nice(current, nice)) { |
| 418 | set_user_nice(current, nice); |
| 419 | return; |
| 420 | } |
| 421 | min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur; |
| 422 | binder_debug(BINDER_DEBUG_PRIORITY_CAP, |
| 423 | "binder: %d: nice value %ld not allowed use " |
| 424 | "%ld instead\n", current->pid, nice, min_nice); |
| 425 | set_user_nice(current, min_nice); |
| 426 | if (min_nice < 20) |
| 427 | return; |
| 428 | binder_user_error("binder: %d RLIMIT_NICE not set\n", current->pid); |
| 429 | } |
| 430 | |
| 431 | static size_t binder_buffer_size(struct binder_proc *proc, |
| 432 | struct binder_buffer *buffer) |
| 433 | { |
| 434 | if (list_is_last(&buffer->entry, &proc->buffers)) |
| 435 | return proc->buffer + proc->buffer_size - (void *)buffer->data; |
| 436 | else |
| 437 | return (size_t)list_entry(buffer->entry.next, |
| 438 | struct binder_buffer, entry) - (size_t)buffer->data; |
| 439 | } |
| 440 | |
| 441 | static void binder_insert_free_buffer(struct binder_proc *proc, |
| 442 | struct binder_buffer *new_buffer) |
| 443 | { |
| 444 | struct rb_node **p = &proc->free_buffers.rb_node; |
| 445 | struct rb_node *parent = NULL; |
| 446 | struct binder_buffer *buffer; |
| 447 | size_t buffer_size; |
| 448 | size_t new_buffer_size; |
| 449 | |
| 450 | BUG_ON(!new_buffer->free); |
| 451 | |
| 452 | new_buffer_size = binder_buffer_size(proc, new_buffer); |
| 453 | |
| 454 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 455 | "binder: %d: add free buffer, size %zd, " |
| 456 | "at %p\n", proc->pid, new_buffer_size, new_buffer); |
| 457 | |
| 458 | while (*p) { |
| 459 | parent = *p; |
| 460 | buffer = rb_entry(parent, struct binder_buffer, rb_node); |
| 461 | BUG_ON(!buffer->free); |
| 462 | |
| 463 | buffer_size = binder_buffer_size(proc, buffer); |
| 464 | |
| 465 | if (new_buffer_size < buffer_size) |
| 466 | p = &parent->rb_left; |
| 467 | else |
| 468 | p = &parent->rb_right; |
| 469 | } |
| 470 | rb_link_node(&new_buffer->rb_node, parent, p); |
| 471 | rb_insert_color(&new_buffer->rb_node, &proc->free_buffers); |
| 472 | } |
| 473 | |
| 474 | static void binder_insert_allocated_buffer(struct binder_proc *proc, |
| 475 | struct binder_buffer *new_buffer) |
| 476 | { |
| 477 | struct rb_node **p = &proc->allocated_buffers.rb_node; |
| 478 | struct rb_node *parent = NULL; |
| 479 | struct binder_buffer *buffer; |
| 480 | |
| 481 | BUG_ON(new_buffer->free); |
| 482 | |
| 483 | while (*p) { |
| 484 | parent = *p; |
| 485 | buffer = rb_entry(parent, struct binder_buffer, rb_node); |
| 486 | BUG_ON(buffer->free); |
| 487 | |
| 488 | if (new_buffer < buffer) |
| 489 | p = &parent->rb_left; |
| 490 | else if (new_buffer > buffer) |
| 491 | p = &parent->rb_right; |
| 492 | else |
| 493 | BUG(); |
| 494 | } |
| 495 | rb_link_node(&new_buffer->rb_node, parent, p); |
| 496 | rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers); |
| 497 | } |
| 498 | |
| 499 | static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc, |
| 500 | void __user *user_ptr) |
| 501 | { |
| 502 | struct rb_node *n = proc->allocated_buffers.rb_node; |
| 503 | struct binder_buffer *buffer; |
| 504 | struct binder_buffer *kern_ptr; |
| 505 | |
| 506 | kern_ptr = user_ptr - proc->user_buffer_offset |
| 507 | - offsetof(struct binder_buffer, data); |
| 508 | |
| 509 | while (n) { |
| 510 | buffer = rb_entry(n, struct binder_buffer, rb_node); |
| 511 | BUG_ON(buffer->free); |
| 512 | |
| 513 | if (kern_ptr < buffer) |
| 514 | n = n->rb_left; |
| 515 | else if (kern_ptr > buffer) |
| 516 | n = n->rb_right; |
| 517 | else |
| 518 | return buffer; |
| 519 | } |
| 520 | return NULL; |
| 521 | } |
| 522 | |
| 523 | static int binder_update_page_range(struct binder_proc *proc, int allocate, |
| 524 | void *start, void *end, |
| 525 | struct vm_area_struct *vma) |
| 526 | { |
| 527 | void *page_addr; |
| 528 | unsigned long user_page_addr; |
| 529 | struct vm_struct tmp_area; |
| 530 | struct page **page; |
| 531 | struct mm_struct *mm; |
| 532 | |
| 533 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 534 | "binder: %d: %s pages %p-%p\n", proc->pid, |
| 535 | allocate ? "allocate" : "free", start, end); |
| 536 | |
| 537 | if (end <= start) |
| 538 | return 0; |
| 539 | |
| 540 | if (vma) |
| 541 | mm = NULL; |
| 542 | else |
| 543 | mm = get_task_mm(proc->tsk); |
| 544 | |
| 545 | if (mm) { |
| 546 | down_write(&mm->mmap_sem); |
| 547 | vma = proc->vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 548 | if (vma && mm != proc->vma_vm_mm) { |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 549 | pr_err("binder: %d: vma mm and task mm mismatch\n", |
| 550 | proc->pid); |
| 551 | vma = NULL; |
| 552 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | if (allocate == 0) |
| 556 | goto free_range; |
| 557 | |
| 558 | if (vma == NULL) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 559 | pr_err("binder: %d: binder_alloc_buf failed to " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 560 | "map pages in userspace, no vma\n", proc->pid); |
| 561 | goto err_no_vma; |
| 562 | } |
| 563 | |
| 564 | for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) { |
| 565 | int ret; |
| 566 | struct page **page_array_ptr; |
| 567 | page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; |
| 568 | |
| 569 | BUG_ON(*page); |
| 570 | *page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 571 | if (*page == NULL) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 572 | pr_err("binder: %d: binder_alloc_buf failed " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 573 | "for page at %p\n", proc->pid, page_addr); |
| 574 | goto err_alloc_page_failed; |
| 575 | } |
| 576 | tmp_area.addr = page_addr; |
| 577 | tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */; |
| 578 | page_array_ptr = page; |
| 579 | ret = map_vm_area(&tmp_area, PAGE_KERNEL, &page_array_ptr); |
| 580 | if (ret) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 581 | pr_err("binder: %d: binder_alloc_buf failed " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 582 | "to map page at %p in kernel\n", |
| 583 | proc->pid, page_addr); |
| 584 | goto err_map_kernel_failed; |
| 585 | } |
| 586 | user_page_addr = |
| 587 | (uintptr_t)page_addr + proc->user_buffer_offset; |
| 588 | ret = vm_insert_page(vma, user_page_addr, page[0]); |
| 589 | if (ret) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 590 | pr_err("binder: %d: binder_alloc_buf failed " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 591 | "to map page at %lx in userspace\n", |
| 592 | proc->pid, user_page_addr); |
| 593 | goto err_vm_insert_page_failed; |
| 594 | } |
| 595 | /* vm_insert_page does not seem to increment the refcount */ |
| 596 | } |
| 597 | if (mm) { |
| 598 | up_write(&mm->mmap_sem); |
| 599 | mmput(mm); |
| 600 | } |
| 601 | return 0; |
| 602 | |
| 603 | free_range: |
| 604 | for (page_addr = end - PAGE_SIZE; page_addr >= start; |
| 605 | page_addr -= PAGE_SIZE) { |
| 606 | page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; |
| 607 | if (vma) |
| 608 | zap_page_range(vma, (uintptr_t)page_addr + |
| 609 | proc->user_buffer_offset, PAGE_SIZE, NULL); |
| 610 | err_vm_insert_page_failed: |
| 611 | unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE); |
| 612 | err_map_kernel_failed: |
| 613 | __free_page(*page); |
| 614 | *page = NULL; |
| 615 | err_alloc_page_failed: |
| 616 | ; |
| 617 | } |
| 618 | err_no_vma: |
| 619 | if (mm) { |
| 620 | up_write(&mm->mmap_sem); |
| 621 | mmput(mm); |
| 622 | } |
| 623 | return -ENOMEM; |
| 624 | } |
| 625 | |
| 626 | static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc, |
| 627 | size_t data_size, |
| 628 | size_t offsets_size, int is_async) |
| 629 | { |
| 630 | struct rb_node *n = proc->free_buffers.rb_node; |
| 631 | struct binder_buffer *buffer; |
| 632 | size_t buffer_size; |
| 633 | struct rb_node *best_fit = NULL; |
| 634 | void *has_page_addr; |
| 635 | void *end_page_addr; |
| 636 | size_t size; |
| 637 | |
| 638 | if (proc->vma == NULL) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 639 | pr_err("binder: %d: binder_alloc_buf, no vma\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 640 | proc->pid); |
| 641 | return NULL; |
| 642 | } |
| 643 | |
| 644 | size = ALIGN(data_size, sizeof(void *)) + |
| 645 | ALIGN(offsets_size, sizeof(void *)); |
| 646 | |
| 647 | if (size < data_size || size < offsets_size) { |
| 648 | binder_user_error("binder: %d: got transaction with invalid " |
| 649 | "size %zd-%zd\n", proc->pid, data_size, offsets_size); |
| 650 | return NULL; |
| 651 | } |
| 652 | |
| 653 | if (is_async && |
| 654 | proc->free_async_space < size + sizeof(struct binder_buffer)) { |
| 655 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 656 | "binder: %d: binder_alloc_buf size %zd" |
| 657 | "failed, no async space left\n", proc->pid, size); |
| 658 | return NULL; |
| 659 | } |
| 660 | |
| 661 | while (n) { |
| 662 | buffer = rb_entry(n, struct binder_buffer, rb_node); |
| 663 | BUG_ON(!buffer->free); |
| 664 | buffer_size = binder_buffer_size(proc, buffer); |
| 665 | |
| 666 | if (size < buffer_size) { |
| 667 | best_fit = n; |
| 668 | n = n->rb_left; |
| 669 | } else if (size > buffer_size) |
| 670 | n = n->rb_right; |
| 671 | else { |
| 672 | best_fit = n; |
| 673 | break; |
| 674 | } |
| 675 | } |
| 676 | if (best_fit == NULL) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 677 | pr_err("binder: %d: binder_alloc_buf size %zd failed, " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 678 | "no address space\n", proc->pid, size); |
| 679 | return NULL; |
| 680 | } |
| 681 | if (n == NULL) { |
| 682 | buffer = rb_entry(best_fit, struct binder_buffer, rb_node); |
| 683 | buffer_size = binder_buffer_size(proc, buffer); |
| 684 | } |
| 685 | |
| 686 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 687 | "binder: %d: binder_alloc_buf size %zd got buff" |
| 688 | "er %p size %zd\n", proc->pid, size, buffer, buffer_size); |
| 689 | |
| 690 | has_page_addr = |
| 691 | (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK); |
| 692 | if (n == NULL) { |
| 693 | if (size + sizeof(struct binder_buffer) + 4 >= buffer_size) |
| 694 | buffer_size = size; /* no room for other buffers */ |
| 695 | else |
| 696 | buffer_size = size + sizeof(struct binder_buffer); |
| 697 | } |
| 698 | end_page_addr = |
| 699 | (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size); |
| 700 | if (end_page_addr > has_page_addr) |
| 701 | end_page_addr = has_page_addr; |
| 702 | if (binder_update_page_range(proc, 1, |
| 703 | (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL)) |
| 704 | return NULL; |
| 705 | |
| 706 | rb_erase(best_fit, &proc->free_buffers); |
| 707 | buffer->free = 0; |
| 708 | binder_insert_allocated_buffer(proc, buffer); |
| 709 | if (buffer_size != size) { |
| 710 | struct binder_buffer *new_buffer = (void *)buffer->data + size; |
| 711 | list_add(&new_buffer->entry, &buffer->entry); |
| 712 | new_buffer->free = 1; |
| 713 | binder_insert_free_buffer(proc, new_buffer); |
| 714 | } |
| 715 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 716 | "binder: %d: binder_alloc_buf size %zd got " |
| 717 | "%p\n", proc->pid, size, buffer); |
| 718 | buffer->data_size = data_size; |
| 719 | buffer->offsets_size = offsets_size; |
| 720 | buffer->async_transaction = is_async; |
| 721 | if (is_async) { |
| 722 | proc->free_async_space -= size + sizeof(struct binder_buffer); |
| 723 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC, |
| 724 | "binder: %d: binder_alloc_buf size %zd " |
| 725 | "async free %zd\n", proc->pid, size, |
| 726 | proc->free_async_space); |
| 727 | } |
| 728 | |
| 729 | return buffer; |
| 730 | } |
| 731 | |
| 732 | static void *buffer_start_page(struct binder_buffer *buffer) |
| 733 | { |
| 734 | return (void *)((uintptr_t)buffer & PAGE_MASK); |
| 735 | } |
| 736 | |
| 737 | static void *buffer_end_page(struct binder_buffer *buffer) |
| 738 | { |
| 739 | return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK); |
| 740 | } |
| 741 | |
| 742 | static void binder_delete_free_buffer(struct binder_proc *proc, |
| 743 | struct binder_buffer *buffer) |
| 744 | { |
| 745 | struct binder_buffer *prev, *next = NULL; |
| 746 | int free_page_end = 1; |
| 747 | int free_page_start = 1; |
| 748 | |
| 749 | BUG_ON(proc->buffers.next == &buffer->entry); |
| 750 | prev = list_entry(buffer->entry.prev, struct binder_buffer, entry); |
| 751 | BUG_ON(!prev->free); |
| 752 | if (buffer_end_page(prev) == buffer_start_page(buffer)) { |
| 753 | free_page_start = 0; |
| 754 | if (buffer_end_page(prev) == buffer_end_page(buffer)) |
| 755 | free_page_end = 0; |
| 756 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 757 | "binder: %d: merge free, buffer %p " |
| 758 | "share page with %p\n", proc->pid, buffer, prev); |
| 759 | } |
| 760 | |
| 761 | if (!list_is_last(&buffer->entry, &proc->buffers)) { |
| 762 | next = list_entry(buffer->entry.next, |
| 763 | struct binder_buffer, entry); |
| 764 | if (buffer_start_page(next) == buffer_end_page(buffer)) { |
| 765 | free_page_end = 0; |
| 766 | if (buffer_start_page(next) == |
| 767 | buffer_start_page(buffer)) |
| 768 | free_page_start = 0; |
| 769 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 770 | "binder: %d: merge free, buffer" |
| 771 | " %p share page with %p\n", proc->pid, |
| 772 | buffer, prev); |
| 773 | } |
| 774 | } |
| 775 | list_del(&buffer->entry); |
| 776 | if (free_page_start || free_page_end) { |
| 777 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 778 | "binder: %d: merge free, buffer %p do " |
| 779 | "not share page%s%s with with %p or %p\n", |
| 780 | proc->pid, buffer, free_page_start ? "" : " end", |
| 781 | free_page_end ? "" : " start", prev, next); |
| 782 | binder_update_page_range(proc, 0, free_page_start ? |
| 783 | buffer_start_page(buffer) : buffer_end_page(buffer), |
| 784 | (free_page_end ? buffer_end_page(buffer) : |
| 785 | buffer_start_page(buffer)) + PAGE_SIZE, NULL); |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | static void binder_free_buf(struct binder_proc *proc, |
| 790 | struct binder_buffer *buffer) |
| 791 | { |
| 792 | size_t size, buffer_size; |
| 793 | |
| 794 | buffer_size = binder_buffer_size(proc, buffer); |
| 795 | |
| 796 | size = ALIGN(buffer->data_size, sizeof(void *)) + |
| 797 | ALIGN(buffer->offsets_size, sizeof(void *)); |
| 798 | |
| 799 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 800 | "binder: %d: binder_free_buf %p size %zd buffer" |
| 801 | "_size %zd\n", proc->pid, buffer, size, buffer_size); |
| 802 | |
| 803 | BUG_ON(buffer->free); |
| 804 | BUG_ON(size > buffer_size); |
| 805 | BUG_ON(buffer->transaction != NULL); |
| 806 | BUG_ON((void *)buffer < proc->buffer); |
| 807 | BUG_ON((void *)buffer > proc->buffer + proc->buffer_size); |
| 808 | |
| 809 | if (buffer->async_transaction) { |
| 810 | proc->free_async_space += size + sizeof(struct binder_buffer); |
| 811 | |
| 812 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC, |
| 813 | "binder: %d: binder_free_buf size %zd " |
| 814 | "async free %zd\n", proc->pid, size, |
| 815 | proc->free_async_space); |
| 816 | } |
| 817 | |
| 818 | binder_update_page_range(proc, 0, |
| 819 | (void *)PAGE_ALIGN((uintptr_t)buffer->data), |
| 820 | (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK), |
| 821 | NULL); |
| 822 | rb_erase(&buffer->rb_node, &proc->allocated_buffers); |
| 823 | buffer->free = 1; |
| 824 | if (!list_is_last(&buffer->entry, &proc->buffers)) { |
| 825 | struct binder_buffer *next = list_entry(buffer->entry.next, |
| 826 | struct binder_buffer, entry); |
| 827 | if (next->free) { |
| 828 | rb_erase(&next->rb_node, &proc->free_buffers); |
| 829 | binder_delete_free_buffer(proc, next); |
| 830 | } |
| 831 | } |
| 832 | if (proc->buffers.next != &buffer->entry) { |
| 833 | struct binder_buffer *prev = list_entry(buffer->entry.prev, |
| 834 | struct binder_buffer, entry); |
| 835 | if (prev->free) { |
| 836 | binder_delete_free_buffer(proc, buffer); |
| 837 | rb_erase(&prev->rb_node, &proc->free_buffers); |
| 838 | buffer = prev; |
| 839 | } |
| 840 | } |
| 841 | binder_insert_free_buffer(proc, buffer); |
| 842 | } |
| 843 | |
| 844 | static struct binder_node *binder_get_node(struct binder_proc *proc, |
| 845 | void __user *ptr) |
| 846 | { |
| 847 | struct rb_node *n = proc->nodes.rb_node; |
| 848 | struct binder_node *node; |
| 849 | |
| 850 | while (n) { |
| 851 | node = rb_entry(n, struct binder_node, rb_node); |
| 852 | |
| 853 | if (ptr < node->ptr) |
| 854 | n = n->rb_left; |
| 855 | else if (ptr > node->ptr) |
| 856 | n = n->rb_right; |
| 857 | else |
| 858 | return node; |
| 859 | } |
| 860 | return NULL; |
| 861 | } |
| 862 | |
| 863 | static struct binder_node *binder_new_node(struct binder_proc *proc, |
| 864 | void __user *ptr, |
| 865 | void __user *cookie) |
| 866 | { |
| 867 | struct rb_node **p = &proc->nodes.rb_node; |
| 868 | struct rb_node *parent = NULL; |
| 869 | struct binder_node *node; |
| 870 | |
| 871 | while (*p) { |
| 872 | parent = *p; |
| 873 | node = rb_entry(parent, struct binder_node, rb_node); |
| 874 | |
| 875 | if (ptr < node->ptr) |
| 876 | p = &(*p)->rb_left; |
| 877 | else if (ptr > node->ptr) |
| 878 | p = &(*p)->rb_right; |
| 879 | else |
| 880 | return NULL; |
| 881 | } |
| 882 | |
| 883 | node = kzalloc(sizeof(*node), GFP_KERNEL); |
| 884 | if (node == NULL) |
| 885 | return NULL; |
| 886 | binder_stats_created(BINDER_STAT_NODE); |
| 887 | rb_link_node(&node->rb_node, parent, p); |
| 888 | rb_insert_color(&node->rb_node, &proc->nodes); |
| 889 | node->debug_id = ++binder_last_id; |
| 890 | node->proc = proc; |
| 891 | node->ptr = ptr; |
| 892 | node->cookie = cookie; |
| 893 | node->work.type = BINDER_WORK_NODE; |
| 894 | INIT_LIST_HEAD(&node->work.entry); |
| 895 | INIT_LIST_HEAD(&node->async_todo); |
| 896 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
| 897 | "binder: %d:%d node %d u%p c%p created\n", |
| 898 | proc->pid, current->pid, node->debug_id, |
| 899 | node->ptr, node->cookie); |
| 900 | return node; |
| 901 | } |
| 902 | |
| 903 | static int binder_inc_node(struct binder_node *node, int strong, int internal, |
| 904 | struct list_head *target_list) |
| 905 | { |
| 906 | if (strong) { |
| 907 | if (internal) { |
| 908 | if (target_list == NULL && |
| 909 | node->internal_strong_refs == 0 && |
| 910 | !(node == binder_context_mgr_node && |
| 911 | node->has_strong_ref)) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 912 | pr_err("binder: invalid inc strong " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 913 | "node for %d\n", node->debug_id); |
| 914 | return -EINVAL; |
| 915 | } |
| 916 | node->internal_strong_refs++; |
| 917 | } else |
| 918 | node->local_strong_refs++; |
| 919 | if (!node->has_strong_ref && target_list) { |
| 920 | list_del_init(&node->work.entry); |
| 921 | list_add_tail(&node->work.entry, target_list); |
| 922 | } |
| 923 | } else { |
| 924 | if (!internal) |
| 925 | node->local_weak_refs++; |
| 926 | if (!node->has_weak_ref && list_empty(&node->work.entry)) { |
| 927 | if (target_list == NULL) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 928 | pr_err("binder: invalid inc weak node " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 929 | "for %d\n", node->debug_id); |
| 930 | return -EINVAL; |
| 931 | } |
| 932 | list_add_tail(&node->work.entry, target_list); |
| 933 | } |
| 934 | } |
| 935 | return 0; |
| 936 | } |
| 937 | |
| 938 | static int binder_dec_node(struct binder_node *node, int strong, int internal) |
| 939 | { |
| 940 | if (strong) { |
| 941 | if (internal) |
| 942 | node->internal_strong_refs--; |
| 943 | else |
| 944 | node->local_strong_refs--; |
| 945 | if (node->local_strong_refs || node->internal_strong_refs) |
| 946 | return 0; |
| 947 | } else { |
| 948 | if (!internal) |
| 949 | node->local_weak_refs--; |
| 950 | if (node->local_weak_refs || !hlist_empty(&node->refs)) |
| 951 | return 0; |
| 952 | } |
| 953 | if (node->proc && (node->has_strong_ref || node->has_weak_ref)) { |
| 954 | if (list_empty(&node->work.entry)) { |
| 955 | list_add_tail(&node->work.entry, &node->proc->todo); |
| 956 | wake_up_interruptible(&node->proc->wait); |
| 957 | } |
| 958 | } else { |
| 959 | if (hlist_empty(&node->refs) && !node->local_strong_refs && |
| 960 | !node->local_weak_refs) { |
| 961 | list_del_init(&node->work.entry); |
| 962 | if (node->proc) { |
| 963 | rb_erase(&node->rb_node, &node->proc->nodes); |
| 964 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
| 965 | "binder: refless node %d deleted\n", |
| 966 | node->debug_id); |
| 967 | } else { |
| 968 | hlist_del(&node->dead_node); |
| 969 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
| 970 | "binder: dead node %d deleted\n", |
| 971 | node->debug_id); |
| 972 | } |
| 973 | kfree(node); |
| 974 | binder_stats_deleted(BINDER_STAT_NODE); |
| 975 | } |
| 976 | } |
| 977 | |
| 978 | return 0; |
| 979 | } |
| 980 | |
| 981 | |
| 982 | static struct binder_ref *binder_get_ref(struct binder_proc *proc, |
| 983 | uint32_t desc) |
| 984 | { |
| 985 | struct rb_node *n = proc->refs_by_desc.rb_node; |
| 986 | struct binder_ref *ref; |
| 987 | |
| 988 | while (n) { |
| 989 | ref = rb_entry(n, struct binder_ref, rb_node_desc); |
| 990 | |
| 991 | if (desc < ref->desc) |
| 992 | n = n->rb_left; |
| 993 | else if (desc > ref->desc) |
| 994 | n = n->rb_right; |
| 995 | else |
| 996 | return ref; |
| 997 | } |
| 998 | return NULL; |
| 999 | } |
| 1000 | |
| 1001 | static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc, |
| 1002 | struct binder_node *node) |
| 1003 | { |
| 1004 | struct rb_node *n; |
| 1005 | struct rb_node **p = &proc->refs_by_node.rb_node; |
| 1006 | struct rb_node *parent = NULL; |
| 1007 | struct binder_ref *ref, *new_ref; |
| 1008 | |
| 1009 | while (*p) { |
| 1010 | parent = *p; |
| 1011 | ref = rb_entry(parent, struct binder_ref, rb_node_node); |
| 1012 | |
| 1013 | if (node < ref->node) |
| 1014 | p = &(*p)->rb_left; |
| 1015 | else if (node > ref->node) |
| 1016 | p = &(*p)->rb_right; |
| 1017 | else |
| 1018 | return ref; |
| 1019 | } |
| 1020 | new_ref = kzalloc(sizeof(*ref), GFP_KERNEL); |
| 1021 | if (new_ref == NULL) |
| 1022 | return NULL; |
| 1023 | binder_stats_created(BINDER_STAT_REF); |
| 1024 | new_ref->debug_id = ++binder_last_id; |
| 1025 | new_ref->proc = proc; |
| 1026 | new_ref->node = node; |
| 1027 | rb_link_node(&new_ref->rb_node_node, parent, p); |
| 1028 | rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node); |
| 1029 | |
| 1030 | new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1; |
| 1031 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
| 1032 | ref = rb_entry(n, struct binder_ref, rb_node_desc); |
| 1033 | if (ref->desc > new_ref->desc) |
| 1034 | break; |
| 1035 | new_ref->desc = ref->desc + 1; |
| 1036 | } |
| 1037 | |
| 1038 | p = &proc->refs_by_desc.rb_node; |
| 1039 | while (*p) { |
| 1040 | parent = *p; |
| 1041 | ref = rb_entry(parent, struct binder_ref, rb_node_desc); |
| 1042 | |
| 1043 | if (new_ref->desc < ref->desc) |
| 1044 | p = &(*p)->rb_left; |
| 1045 | else if (new_ref->desc > ref->desc) |
| 1046 | p = &(*p)->rb_right; |
| 1047 | else |
| 1048 | BUG(); |
| 1049 | } |
| 1050 | rb_link_node(&new_ref->rb_node_desc, parent, p); |
| 1051 | rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc); |
| 1052 | if (node) { |
| 1053 | hlist_add_head(&new_ref->node_entry, &node->refs); |
| 1054 | |
| 1055 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
| 1056 | "binder: %d new ref %d desc %d for " |
| 1057 | "node %d\n", proc->pid, new_ref->debug_id, |
| 1058 | new_ref->desc, node->debug_id); |
| 1059 | } else { |
| 1060 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
| 1061 | "binder: %d new ref %d desc %d for " |
| 1062 | "dead node\n", proc->pid, new_ref->debug_id, |
| 1063 | new_ref->desc); |
| 1064 | } |
| 1065 | return new_ref; |
| 1066 | } |
| 1067 | |
| 1068 | static void binder_delete_ref(struct binder_ref *ref) |
| 1069 | { |
| 1070 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
| 1071 | "binder: %d delete ref %d desc %d for " |
| 1072 | "node %d\n", ref->proc->pid, ref->debug_id, |
| 1073 | ref->desc, ref->node->debug_id); |
| 1074 | |
| 1075 | rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc); |
| 1076 | rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node); |
| 1077 | if (ref->strong) |
| 1078 | binder_dec_node(ref->node, 1, 1); |
| 1079 | hlist_del(&ref->node_entry); |
| 1080 | binder_dec_node(ref->node, 0, 1); |
| 1081 | if (ref->death) { |
| 1082 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 1083 | "binder: %d delete ref %d desc %d " |
| 1084 | "has death notification\n", ref->proc->pid, |
| 1085 | ref->debug_id, ref->desc); |
| 1086 | list_del(&ref->death->work.entry); |
| 1087 | kfree(ref->death); |
| 1088 | binder_stats_deleted(BINDER_STAT_DEATH); |
| 1089 | } |
| 1090 | kfree(ref); |
| 1091 | binder_stats_deleted(BINDER_STAT_REF); |
| 1092 | } |
| 1093 | |
| 1094 | static int binder_inc_ref(struct binder_ref *ref, int strong, |
| 1095 | struct list_head *target_list) |
| 1096 | { |
| 1097 | int ret; |
| 1098 | if (strong) { |
| 1099 | if (ref->strong == 0) { |
| 1100 | ret = binder_inc_node(ref->node, 1, 1, target_list); |
| 1101 | if (ret) |
| 1102 | return ret; |
| 1103 | } |
| 1104 | ref->strong++; |
| 1105 | } else { |
| 1106 | if (ref->weak == 0) { |
| 1107 | ret = binder_inc_node(ref->node, 0, 1, target_list); |
| 1108 | if (ret) |
| 1109 | return ret; |
| 1110 | } |
| 1111 | ref->weak++; |
| 1112 | } |
| 1113 | return 0; |
| 1114 | } |
| 1115 | |
| 1116 | |
| 1117 | static int binder_dec_ref(struct binder_ref *ref, int strong) |
| 1118 | { |
| 1119 | if (strong) { |
| 1120 | if (ref->strong == 0) { |
| 1121 | binder_user_error("binder: %d invalid dec strong, " |
| 1122 | "ref %d desc %d s %d w %d\n", |
| 1123 | ref->proc->pid, ref->debug_id, |
| 1124 | ref->desc, ref->strong, ref->weak); |
| 1125 | return -EINVAL; |
| 1126 | } |
| 1127 | ref->strong--; |
| 1128 | if (ref->strong == 0) { |
| 1129 | int ret; |
| 1130 | ret = binder_dec_node(ref->node, strong, 1); |
| 1131 | if (ret) |
| 1132 | return ret; |
| 1133 | } |
| 1134 | } else { |
| 1135 | if (ref->weak == 0) { |
| 1136 | binder_user_error("binder: %d invalid dec weak, " |
| 1137 | "ref %d desc %d s %d w %d\n", |
| 1138 | ref->proc->pid, ref->debug_id, |
| 1139 | ref->desc, ref->strong, ref->weak); |
| 1140 | return -EINVAL; |
| 1141 | } |
| 1142 | ref->weak--; |
| 1143 | } |
| 1144 | if (ref->strong == 0 && ref->weak == 0) |
| 1145 | binder_delete_ref(ref); |
| 1146 | return 0; |
| 1147 | } |
| 1148 | |
| 1149 | static void binder_pop_transaction(struct binder_thread *target_thread, |
| 1150 | struct binder_transaction *t) |
| 1151 | { |
| 1152 | if (target_thread) { |
| 1153 | BUG_ON(target_thread->transaction_stack != t); |
| 1154 | BUG_ON(target_thread->transaction_stack->from != target_thread); |
| 1155 | target_thread->transaction_stack = |
| 1156 | target_thread->transaction_stack->from_parent; |
| 1157 | t->from = NULL; |
| 1158 | } |
| 1159 | t->need_reply = 0; |
| 1160 | if (t->buffer) |
| 1161 | t->buffer->transaction = NULL; |
| 1162 | kfree(t); |
| 1163 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 1164 | } |
| 1165 | |
| 1166 | static void binder_send_failed_reply(struct binder_transaction *t, |
| 1167 | uint32_t error_code) |
| 1168 | { |
| 1169 | struct binder_thread *target_thread; |
| 1170 | BUG_ON(t->flags & TF_ONE_WAY); |
| 1171 | while (1) { |
| 1172 | target_thread = t->from; |
| 1173 | if (target_thread) { |
| 1174 | if (target_thread->return_error != BR_OK && |
| 1175 | target_thread->return_error2 == BR_OK) { |
| 1176 | target_thread->return_error2 = |
| 1177 | target_thread->return_error; |
| 1178 | target_thread->return_error = BR_OK; |
| 1179 | } |
| 1180 | if (target_thread->return_error == BR_OK) { |
| 1181 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
| 1182 | "binder: send failed reply for " |
| 1183 | "transaction %d to %d:%d\n", |
| 1184 | t->debug_id, target_thread->proc->pid, |
| 1185 | target_thread->pid); |
| 1186 | |
| 1187 | binder_pop_transaction(target_thread, t); |
| 1188 | target_thread->return_error = error_code; |
| 1189 | wake_up_interruptible(&target_thread->wait); |
| 1190 | } else { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 1191 | pr_err("binder: reply failed, target " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1192 | "thread, %d:%d, has error code %d " |
| 1193 | "already\n", target_thread->proc->pid, |
| 1194 | target_thread->pid, |
| 1195 | target_thread->return_error); |
| 1196 | } |
| 1197 | return; |
| 1198 | } else { |
| 1199 | struct binder_transaction *next = t->from_parent; |
| 1200 | |
| 1201 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
| 1202 | "binder: send failed reply " |
| 1203 | "for transaction %d, target dead\n", |
| 1204 | t->debug_id); |
| 1205 | |
| 1206 | binder_pop_transaction(target_thread, t); |
| 1207 | if (next == NULL) { |
| 1208 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 1209 | "binder: reply failed," |
| 1210 | " no target thread at root\n"); |
| 1211 | return; |
| 1212 | } |
| 1213 | t = next; |
| 1214 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 1215 | "binder: reply failed, no target " |
| 1216 | "thread -- retry %d\n", t->debug_id); |
| 1217 | } |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | static void binder_transaction_buffer_release(struct binder_proc *proc, |
| 1222 | struct binder_buffer *buffer, |
| 1223 | size_t *failed_at) |
| 1224 | { |
| 1225 | size_t *offp, *off_end; |
| 1226 | int debug_id = buffer->debug_id; |
| 1227 | |
| 1228 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1229 | "binder: %d buffer release %d, size %zd-%zd, failed at %p\n", |
| 1230 | proc->pid, buffer->debug_id, |
| 1231 | buffer->data_size, buffer->offsets_size, failed_at); |
| 1232 | |
| 1233 | if (buffer->target_node) |
| 1234 | binder_dec_node(buffer->target_node, 1, 0); |
| 1235 | |
| 1236 | offp = (size_t *)(buffer->data + ALIGN(buffer->data_size, sizeof(void *))); |
| 1237 | if (failed_at) |
| 1238 | off_end = failed_at; |
| 1239 | else |
| 1240 | off_end = (void *)offp + buffer->offsets_size; |
| 1241 | for (; offp < off_end; offp++) { |
| 1242 | struct flat_binder_object *fp; |
| 1243 | if (*offp > buffer->data_size - sizeof(*fp) || |
| 1244 | buffer->data_size < sizeof(*fp) || |
| 1245 | !IS_ALIGNED(*offp, sizeof(void *))) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 1246 | pr_err("binder: transaction release %d bad" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1247 | "offset %zd, size %zd\n", debug_id, |
| 1248 | *offp, buffer->data_size); |
| 1249 | continue; |
| 1250 | } |
| 1251 | fp = (struct flat_binder_object *)(buffer->data + *offp); |
| 1252 | switch (fp->type) { |
| 1253 | case BINDER_TYPE_BINDER: |
| 1254 | case BINDER_TYPE_WEAK_BINDER: { |
| 1255 | struct binder_node *node = binder_get_node(proc, fp->binder); |
| 1256 | if (node == NULL) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 1257 | pr_err("binder: transaction release %d" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1258 | " bad node %p\n", debug_id, fp->binder); |
| 1259 | break; |
| 1260 | } |
| 1261 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1262 | " node %d u%p\n", |
| 1263 | node->debug_id, node->ptr); |
| 1264 | binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0); |
| 1265 | } break; |
| 1266 | case BINDER_TYPE_HANDLE: |
| 1267 | case BINDER_TYPE_WEAK_HANDLE: { |
| 1268 | struct binder_ref *ref = binder_get_ref(proc, fp->handle); |
| 1269 | if (ref == NULL) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 1270 | pr_err("binder: transaction release %d" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1271 | " bad handle %ld\n", debug_id, |
| 1272 | fp->handle); |
| 1273 | break; |
| 1274 | } |
| 1275 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1276 | " ref %d desc %d (node %d)\n", |
| 1277 | ref->debug_id, ref->desc, ref->node->debug_id); |
| 1278 | binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE); |
| 1279 | } break; |
| 1280 | |
| 1281 | case BINDER_TYPE_FD: |
| 1282 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1283 | " fd %ld\n", fp->handle); |
| 1284 | if (failed_at) |
| 1285 | task_close_fd(proc, fp->handle); |
| 1286 | break; |
| 1287 | |
| 1288 | default: |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 1289 | pr_err("binder: transaction release %d bad " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1290 | "object type %lx\n", debug_id, fp->type); |
| 1291 | break; |
| 1292 | } |
| 1293 | } |
| 1294 | } |
| 1295 | |
| 1296 | static void binder_transaction(struct binder_proc *proc, |
| 1297 | struct binder_thread *thread, |
| 1298 | struct binder_transaction_data *tr, int reply) |
| 1299 | { |
| 1300 | struct binder_transaction *t; |
| 1301 | struct binder_work *tcomplete; |
| 1302 | size_t *offp, *off_end; |
| 1303 | struct binder_proc *target_proc; |
| 1304 | struct binder_thread *target_thread = NULL; |
| 1305 | struct binder_node *target_node = NULL; |
| 1306 | struct list_head *target_list; |
| 1307 | wait_queue_head_t *target_wait; |
| 1308 | struct binder_transaction *in_reply_to = NULL; |
| 1309 | struct binder_transaction_log_entry *e; |
| 1310 | uint32_t return_error; |
| 1311 | |
| 1312 | e = binder_transaction_log_add(&binder_transaction_log); |
| 1313 | e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY); |
| 1314 | e->from_proc = proc->pid; |
| 1315 | e->from_thread = thread->pid; |
| 1316 | e->target_handle = tr->target.handle; |
| 1317 | e->data_size = tr->data_size; |
| 1318 | e->offsets_size = tr->offsets_size; |
| 1319 | |
| 1320 | if (reply) { |
| 1321 | in_reply_to = thread->transaction_stack; |
| 1322 | if (in_reply_to == NULL) { |
| 1323 | binder_user_error("binder: %d:%d got reply transaction " |
| 1324 | "with no transaction stack\n", |
| 1325 | proc->pid, thread->pid); |
| 1326 | return_error = BR_FAILED_REPLY; |
| 1327 | goto err_empty_call_stack; |
| 1328 | } |
| 1329 | binder_set_nice(in_reply_to->saved_priority); |
| 1330 | if (in_reply_to->to_thread != thread) { |
| 1331 | binder_user_error("binder: %d:%d got reply transaction " |
| 1332 | "with bad transaction stack," |
| 1333 | " transaction %d has target %d:%d\n", |
| 1334 | proc->pid, thread->pid, in_reply_to->debug_id, |
| 1335 | in_reply_to->to_proc ? |
| 1336 | in_reply_to->to_proc->pid : 0, |
| 1337 | in_reply_to->to_thread ? |
| 1338 | in_reply_to->to_thread->pid : 0); |
| 1339 | return_error = BR_FAILED_REPLY; |
| 1340 | in_reply_to = NULL; |
| 1341 | goto err_bad_call_stack; |
| 1342 | } |
| 1343 | thread->transaction_stack = in_reply_to->to_parent; |
| 1344 | target_thread = in_reply_to->from; |
| 1345 | if (target_thread == NULL) { |
| 1346 | return_error = BR_DEAD_REPLY; |
| 1347 | goto err_dead_binder; |
| 1348 | } |
| 1349 | if (target_thread->transaction_stack != in_reply_to) { |
| 1350 | binder_user_error("binder: %d:%d got reply transaction " |
| 1351 | "with bad target transaction stack %d, " |
| 1352 | "expected %d\n", |
| 1353 | proc->pid, thread->pid, |
| 1354 | target_thread->transaction_stack ? |
| 1355 | target_thread->transaction_stack->debug_id : 0, |
| 1356 | in_reply_to->debug_id); |
| 1357 | return_error = BR_FAILED_REPLY; |
| 1358 | in_reply_to = NULL; |
| 1359 | target_thread = NULL; |
| 1360 | goto err_dead_binder; |
| 1361 | } |
| 1362 | target_proc = target_thread->proc; |
| 1363 | } else { |
| 1364 | if (tr->target.handle) { |
| 1365 | struct binder_ref *ref; |
| 1366 | ref = binder_get_ref(proc, tr->target.handle); |
| 1367 | if (ref == NULL) { |
| 1368 | binder_user_error("binder: %d:%d got " |
| 1369 | "transaction to invalid handle\n", |
| 1370 | proc->pid, thread->pid); |
| 1371 | return_error = BR_FAILED_REPLY; |
| 1372 | goto err_invalid_target_handle; |
| 1373 | } |
| 1374 | target_node = ref->node; |
| 1375 | } else { |
| 1376 | target_node = binder_context_mgr_node; |
| 1377 | if (target_node == NULL) { |
| 1378 | return_error = BR_DEAD_REPLY; |
| 1379 | goto err_no_context_mgr_node; |
| 1380 | } |
| 1381 | } |
| 1382 | e->to_node = target_node->debug_id; |
| 1383 | target_proc = target_node->proc; |
| 1384 | if (target_proc == NULL) { |
| 1385 | return_error = BR_DEAD_REPLY; |
| 1386 | goto err_dead_binder; |
| 1387 | } |
| 1388 | if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) { |
| 1389 | struct binder_transaction *tmp; |
| 1390 | tmp = thread->transaction_stack; |
| 1391 | if (tmp->to_thread != thread) { |
| 1392 | binder_user_error("binder: %d:%d got new " |
| 1393 | "transaction with bad transaction stack" |
| 1394 | ", transaction %d has target %d:%d\n", |
| 1395 | proc->pid, thread->pid, tmp->debug_id, |
| 1396 | tmp->to_proc ? tmp->to_proc->pid : 0, |
| 1397 | tmp->to_thread ? |
| 1398 | tmp->to_thread->pid : 0); |
| 1399 | return_error = BR_FAILED_REPLY; |
| 1400 | goto err_bad_call_stack; |
| 1401 | } |
| 1402 | while (tmp) { |
| 1403 | if (tmp->from && tmp->from->proc == target_proc) |
| 1404 | target_thread = tmp->from; |
| 1405 | tmp = tmp->from_parent; |
| 1406 | } |
| 1407 | } |
| 1408 | } |
| 1409 | if (target_thread) { |
| 1410 | e->to_thread = target_thread->pid; |
| 1411 | target_list = &target_thread->todo; |
| 1412 | target_wait = &target_thread->wait; |
| 1413 | } else { |
| 1414 | target_list = &target_proc->todo; |
| 1415 | target_wait = &target_proc->wait; |
| 1416 | } |
| 1417 | e->to_proc = target_proc->pid; |
| 1418 | |
| 1419 | /* TODO: reuse incoming transaction for reply */ |
| 1420 | t = kzalloc(sizeof(*t), GFP_KERNEL); |
| 1421 | if (t == NULL) { |
| 1422 | return_error = BR_FAILED_REPLY; |
| 1423 | goto err_alloc_t_failed; |
| 1424 | } |
| 1425 | binder_stats_created(BINDER_STAT_TRANSACTION); |
| 1426 | |
| 1427 | tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL); |
| 1428 | if (tcomplete == NULL) { |
| 1429 | return_error = BR_FAILED_REPLY; |
| 1430 | goto err_alloc_tcomplete_failed; |
| 1431 | } |
| 1432 | binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE); |
| 1433 | |
| 1434 | t->debug_id = ++binder_last_id; |
| 1435 | e->debug_id = t->debug_id; |
| 1436 | |
| 1437 | if (reply) |
| 1438 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1439 | "binder: %d:%d BC_REPLY %d -> %d:%d, " |
| 1440 | "data %p-%p size %zd-%zd\n", |
| 1441 | proc->pid, thread->pid, t->debug_id, |
| 1442 | target_proc->pid, target_thread->pid, |
| 1443 | tr->data.ptr.buffer, tr->data.ptr.offsets, |
| 1444 | tr->data_size, tr->offsets_size); |
| 1445 | else |
| 1446 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1447 | "binder: %d:%d BC_TRANSACTION %d -> " |
| 1448 | "%d - node %d, data %p-%p size %zd-%zd\n", |
| 1449 | proc->pid, thread->pid, t->debug_id, |
| 1450 | target_proc->pid, target_node->debug_id, |
| 1451 | tr->data.ptr.buffer, tr->data.ptr.offsets, |
| 1452 | tr->data_size, tr->offsets_size); |
| 1453 | |
| 1454 | if (!reply && !(tr->flags & TF_ONE_WAY)) |
| 1455 | t->from = thread; |
| 1456 | else |
| 1457 | t->from = NULL; |
| 1458 | t->sender_euid = proc->tsk->cred->euid; |
| 1459 | t->to_proc = target_proc; |
| 1460 | t->to_thread = target_thread; |
| 1461 | t->code = tr->code; |
| 1462 | t->flags = tr->flags; |
| 1463 | t->priority = task_nice(current); |
| 1464 | t->buffer = binder_alloc_buf(target_proc, tr->data_size, |
| 1465 | tr->offsets_size, !reply && (t->flags & TF_ONE_WAY)); |
| 1466 | if (t->buffer == NULL) { |
| 1467 | return_error = BR_FAILED_REPLY; |
| 1468 | goto err_binder_alloc_buf_failed; |
| 1469 | } |
| 1470 | t->buffer->allow_user_free = 0; |
| 1471 | t->buffer->debug_id = t->debug_id; |
| 1472 | t->buffer->transaction = t; |
| 1473 | t->buffer->target_node = target_node; |
| 1474 | if (target_node) |
| 1475 | binder_inc_node(target_node, 1, 0, NULL); |
| 1476 | |
| 1477 | offp = (size_t *)(t->buffer->data + ALIGN(tr->data_size, sizeof(void *))); |
| 1478 | |
| 1479 | if (copy_from_user(t->buffer->data, tr->data.ptr.buffer, tr->data_size)) { |
| 1480 | binder_user_error("binder: %d:%d got transaction with invalid " |
| 1481 | "data ptr\n", proc->pid, thread->pid); |
| 1482 | return_error = BR_FAILED_REPLY; |
| 1483 | goto err_copy_data_failed; |
| 1484 | } |
| 1485 | if (copy_from_user(offp, tr->data.ptr.offsets, tr->offsets_size)) { |
| 1486 | binder_user_error("binder: %d:%d got transaction with invalid " |
| 1487 | "offsets ptr\n", proc->pid, thread->pid); |
| 1488 | return_error = BR_FAILED_REPLY; |
| 1489 | goto err_copy_data_failed; |
| 1490 | } |
| 1491 | if (!IS_ALIGNED(tr->offsets_size, sizeof(size_t))) { |
| 1492 | binder_user_error("binder: %d:%d got transaction with " |
| 1493 | "invalid offsets size, %zd\n", |
| 1494 | proc->pid, thread->pid, tr->offsets_size); |
| 1495 | return_error = BR_FAILED_REPLY; |
| 1496 | goto err_bad_offset; |
| 1497 | } |
| 1498 | off_end = (void *)offp + tr->offsets_size; |
| 1499 | for (; offp < off_end; offp++) { |
| 1500 | struct flat_binder_object *fp; |
| 1501 | if (*offp > t->buffer->data_size - sizeof(*fp) || |
| 1502 | t->buffer->data_size < sizeof(*fp) || |
| 1503 | !IS_ALIGNED(*offp, sizeof(void *))) { |
| 1504 | binder_user_error("binder: %d:%d got transaction with " |
| 1505 | "invalid offset, %zd\n", |
| 1506 | proc->pid, thread->pid, *offp); |
| 1507 | return_error = BR_FAILED_REPLY; |
| 1508 | goto err_bad_offset; |
| 1509 | } |
| 1510 | fp = (struct flat_binder_object *)(t->buffer->data + *offp); |
| 1511 | switch (fp->type) { |
| 1512 | case BINDER_TYPE_BINDER: |
| 1513 | case BINDER_TYPE_WEAK_BINDER: { |
| 1514 | struct binder_ref *ref; |
| 1515 | struct binder_node *node = binder_get_node(proc, fp->binder); |
| 1516 | if (node == NULL) { |
| 1517 | node = binder_new_node(proc, fp->binder, fp->cookie); |
| 1518 | if (node == NULL) { |
| 1519 | return_error = BR_FAILED_REPLY; |
| 1520 | goto err_binder_new_node_failed; |
| 1521 | } |
| 1522 | node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK; |
| 1523 | node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS); |
| 1524 | } |
| 1525 | if (fp->cookie != node->cookie) { |
| 1526 | binder_user_error("binder: %d:%d sending u%p " |
| 1527 | "node %d, cookie mismatch %p != %p\n", |
| 1528 | proc->pid, thread->pid, |
| 1529 | fp->binder, node->debug_id, |
| 1530 | fp->cookie, node->cookie); |
| 1531 | goto err_binder_get_ref_for_node_failed; |
| 1532 | } |
| 1533 | ref = binder_get_ref_for_node(target_proc, node); |
| 1534 | if (ref == NULL) { |
| 1535 | return_error = BR_FAILED_REPLY; |
| 1536 | goto err_binder_get_ref_for_node_failed; |
| 1537 | } |
| 1538 | if (fp->type == BINDER_TYPE_BINDER) |
| 1539 | fp->type = BINDER_TYPE_HANDLE; |
| 1540 | else |
| 1541 | fp->type = BINDER_TYPE_WEAK_HANDLE; |
| 1542 | fp->handle = ref->desc; |
| 1543 | binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE, |
| 1544 | &thread->todo); |
| 1545 | |
| 1546 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1547 | " node %d u%p -> ref %d desc %d\n", |
| 1548 | node->debug_id, node->ptr, ref->debug_id, |
| 1549 | ref->desc); |
| 1550 | } break; |
| 1551 | case BINDER_TYPE_HANDLE: |
| 1552 | case BINDER_TYPE_WEAK_HANDLE: { |
| 1553 | struct binder_ref *ref = binder_get_ref(proc, fp->handle); |
| 1554 | if (ref == NULL) { |
| 1555 | binder_user_error("binder: %d:%d got " |
| 1556 | "transaction with invalid " |
| 1557 | "handle, %ld\n", proc->pid, |
| 1558 | thread->pid, fp->handle); |
| 1559 | return_error = BR_FAILED_REPLY; |
| 1560 | goto err_binder_get_ref_failed; |
| 1561 | } |
| 1562 | if (ref->node->proc == target_proc) { |
| 1563 | if (fp->type == BINDER_TYPE_HANDLE) |
| 1564 | fp->type = BINDER_TYPE_BINDER; |
| 1565 | else |
| 1566 | fp->type = BINDER_TYPE_WEAK_BINDER; |
| 1567 | fp->binder = ref->node->ptr; |
| 1568 | fp->cookie = ref->node->cookie; |
| 1569 | binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL); |
| 1570 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1571 | " ref %d desc %d -> node %d u%p\n", |
| 1572 | ref->debug_id, ref->desc, ref->node->debug_id, |
| 1573 | ref->node->ptr); |
| 1574 | } else { |
| 1575 | struct binder_ref *new_ref; |
| 1576 | new_ref = binder_get_ref_for_node(target_proc, ref->node); |
| 1577 | if (new_ref == NULL) { |
| 1578 | return_error = BR_FAILED_REPLY; |
| 1579 | goto err_binder_get_ref_for_node_failed; |
| 1580 | } |
| 1581 | fp->handle = new_ref->desc; |
| 1582 | binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL); |
| 1583 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1584 | " ref %d desc %d -> ref %d desc %d (node %d)\n", |
| 1585 | ref->debug_id, ref->desc, new_ref->debug_id, |
| 1586 | new_ref->desc, ref->node->debug_id); |
| 1587 | } |
| 1588 | } break; |
| 1589 | |
| 1590 | case BINDER_TYPE_FD: { |
| 1591 | int target_fd; |
| 1592 | struct file *file; |
| 1593 | |
| 1594 | if (reply) { |
| 1595 | if (!(in_reply_to->flags & TF_ACCEPT_FDS)) { |
| 1596 | binder_user_error("binder: %d:%d got reply with fd, %ld, but target does not allow fds\n", |
| 1597 | proc->pid, thread->pid, fp->handle); |
| 1598 | return_error = BR_FAILED_REPLY; |
| 1599 | goto err_fd_not_allowed; |
| 1600 | } |
| 1601 | } else if (!target_node->accept_fds) { |
| 1602 | binder_user_error("binder: %d:%d got transaction with fd, %ld, but target does not allow fds\n", |
| 1603 | proc->pid, thread->pid, fp->handle); |
| 1604 | return_error = BR_FAILED_REPLY; |
| 1605 | goto err_fd_not_allowed; |
| 1606 | } |
| 1607 | |
| 1608 | file = fget(fp->handle); |
| 1609 | if (file == NULL) { |
| 1610 | binder_user_error("binder: %d:%d got transaction with invalid fd, %ld\n", |
| 1611 | proc->pid, thread->pid, fp->handle); |
| 1612 | return_error = BR_FAILED_REPLY; |
| 1613 | goto err_fget_failed; |
| 1614 | } |
| 1615 | target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC); |
| 1616 | if (target_fd < 0) { |
| 1617 | fput(file); |
| 1618 | return_error = BR_FAILED_REPLY; |
| 1619 | goto err_get_unused_fd_failed; |
| 1620 | } |
| 1621 | task_fd_install(target_proc, target_fd, file); |
| 1622 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1623 | " fd %ld -> %d\n", fp->handle, target_fd); |
| 1624 | /* TODO: fput? */ |
| 1625 | fp->handle = target_fd; |
| 1626 | } break; |
| 1627 | |
| 1628 | default: |
| 1629 | binder_user_error("binder: %d:%d got transactio" |
| 1630 | "n with invalid object type, %lx\n", |
| 1631 | proc->pid, thread->pid, fp->type); |
| 1632 | return_error = BR_FAILED_REPLY; |
| 1633 | goto err_bad_object_type; |
| 1634 | } |
| 1635 | } |
| 1636 | if (reply) { |
| 1637 | BUG_ON(t->buffer->async_transaction != 0); |
| 1638 | binder_pop_transaction(target_thread, in_reply_to); |
| 1639 | } else if (!(t->flags & TF_ONE_WAY)) { |
| 1640 | BUG_ON(t->buffer->async_transaction != 0); |
| 1641 | t->need_reply = 1; |
| 1642 | t->from_parent = thread->transaction_stack; |
| 1643 | thread->transaction_stack = t; |
| 1644 | } else { |
| 1645 | BUG_ON(target_node == NULL); |
| 1646 | BUG_ON(t->buffer->async_transaction != 1); |
| 1647 | if (target_node->has_async_transaction) { |
| 1648 | target_list = &target_node->async_todo; |
| 1649 | target_wait = NULL; |
| 1650 | } else |
| 1651 | target_node->has_async_transaction = 1; |
| 1652 | } |
| 1653 | t->work.type = BINDER_WORK_TRANSACTION; |
| 1654 | list_add_tail(&t->work.entry, target_list); |
| 1655 | tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE; |
| 1656 | list_add_tail(&tcomplete->entry, &thread->todo); |
| 1657 | if (target_wait) |
| 1658 | wake_up_interruptible(target_wait); |
| 1659 | return; |
| 1660 | |
| 1661 | err_get_unused_fd_failed: |
| 1662 | err_fget_failed: |
| 1663 | err_fd_not_allowed: |
| 1664 | err_binder_get_ref_for_node_failed: |
| 1665 | err_binder_get_ref_failed: |
| 1666 | err_binder_new_node_failed: |
| 1667 | err_bad_object_type: |
| 1668 | err_bad_offset: |
| 1669 | err_copy_data_failed: |
| 1670 | binder_transaction_buffer_release(target_proc, t->buffer, offp); |
| 1671 | t->buffer->transaction = NULL; |
| 1672 | binder_free_buf(target_proc, t->buffer); |
| 1673 | err_binder_alloc_buf_failed: |
| 1674 | kfree(tcomplete); |
| 1675 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 1676 | err_alloc_tcomplete_failed: |
| 1677 | kfree(t); |
| 1678 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 1679 | err_alloc_t_failed: |
| 1680 | err_bad_call_stack: |
| 1681 | err_empty_call_stack: |
| 1682 | err_dead_binder: |
| 1683 | err_invalid_target_handle: |
| 1684 | err_no_context_mgr_node: |
| 1685 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
| 1686 | "binder: %d:%d transaction failed %d, size %zd-%zd\n", |
| 1687 | proc->pid, thread->pid, return_error, |
| 1688 | tr->data_size, tr->offsets_size); |
| 1689 | |
| 1690 | { |
| 1691 | struct binder_transaction_log_entry *fe; |
| 1692 | fe = binder_transaction_log_add(&binder_transaction_log_failed); |
| 1693 | *fe = *e; |
| 1694 | } |
| 1695 | |
| 1696 | BUG_ON(thread->return_error != BR_OK); |
| 1697 | if (in_reply_to) { |
| 1698 | thread->return_error = BR_TRANSACTION_COMPLETE; |
| 1699 | binder_send_failed_reply(in_reply_to, return_error); |
| 1700 | } else |
| 1701 | thread->return_error = return_error; |
| 1702 | } |
| 1703 | |
| 1704 | int binder_thread_write(struct binder_proc *proc, struct binder_thread *thread, |
| 1705 | void __user *buffer, int size, signed long *consumed) |
| 1706 | { |
| 1707 | uint32_t cmd; |
| 1708 | void __user *ptr = buffer + *consumed; |
| 1709 | void __user *end = buffer + size; |
| 1710 | |
| 1711 | while (ptr < end && thread->return_error == BR_OK) { |
| 1712 | if (get_user(cmd, (uint32_t __user *)ptr)) |
| 1713 | return -EFAULT; |
| 1714 | ptr += sizeof(uint32_t); |
| 1715 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) { |
| 1716 | binder_stats.bc[_IOC_NR(cmd)]++; |
| 1717 | proc->stats.bc[_IOC_NR(cmd)]++; |
| 1718 | thread->stats.bc[_IOC_NR(cmd)]++; |
| 1719 | } |
| 1720 | switch (cmd) { |
| 1721 | case BC_INCREFS: |
| 1722 | case BC_ACQUIRE: |
| 1723 | case BC_RELEASE: |
| 1724 | case BC_DECREFS: { |
| 1725 | uint32_t target; |
| 1726 | struct binder_ref *ref; |
| 1727 | const char *debug_string; |
| 1728 | |
| 1729 | if (get_user(target, (uint32_t __user *)ptr)) |
| 1730 | return -EFAULT; |
| 1731 | ptr += sizeof(uint32_t); |
| 1732 | if (target == 0 && binder_context_mgr_node && |
| 1733 | (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) { |
| 1734 | ref = binder_get_ref_for_node(proc, |
| 1735 | binder_context_mgr_node); |
| 1736 | if (ref->desc != target) { |
| 1737 | binder_user_error("binder: %d:" |
| 1738 | "%d tried to acquire " |
| 1739 | "reference to desc 0, " |
| 1740 | "got %d instead\n", |
| 1741 | proc->pid, thread->pid, |
| 1742 | ref->desc); |
| 1743 | } |
| 1744 | } else |
| 1745 | ref = binder_get_ref(proc, target); |
| 1746 | if (ref == NULL) { |
| 1747 | binder_user_error("binder: %d:%d refcou" |
| 1748 | "nt change on invalid ref %d\n", |
| 1749 | proc->pid, thread->pid, target); |
| 1750 | break; |
| 1751 | } |
| 1752 | switch (cmd) { |
| 1753 | case BC_INCREFS: |
| 1754 | debug_string = "IncRefs"; |
| 1755 | binder_inc_ref(ref, 0, NULL); |
| 1756 | break; |
| 1757 | case BC_ACQUIRE: |
| 1758 | debug_string = "Acquire"; |
| 1759 | binder_inc_ref(ref, 1, NULL); |
| 1760 | break; |
| 1761 | case BC_RELEASE: |
| 1762 | debug_string = "Release"; |
| 1763 | binder_dec_ref(ref, 1); |
| 1764 | break; |
| 1765 | case BC_DECREFS: |
| 1766 | default: |
| 1767 | debug_string = "DecRefs"; |
| 1768 | binder_dec_ref(ref, 0); |
| 1769 | break; |
| 1770 | } |
| 1771 | binder_debug(BINDER_DEBUG_USER_REFS, |
| 1772 | "binder: %d:%d %s ref %d desc %d s %d w %d for node %d\n", |
| 1773 | proc->pid, thread->pid, debug_string, ref->debug_id, |
| 1774 | ref->desc, ref->strong, ref->weak, ref->node->debug_id); |
| 1775 | break; |
| 1776 | } |
| 1777 | case BC_INCREFS_DONE: |
| 1778 | case BC_ACQUIRE_DONE: { |
| 1779 | void __user *node_ptr; |
| 1780 | void *cookie; |
| 1781 | struct binder_node *node; |
| 1782 | |
| 1783 | if (get_user(node_ptr, (void * __user *)ptr)) |
| 1784 | return -EFAULT; |
| 1785 | ptr += sizeof(void *); |
| 1786 | if (get_user(cookie, (void * __user *)ptr)) |
| 1787 | return -EFAULT; |
| 1788 | ptr += sizeof(void *); |
| 1789 | node = binder_get_node(proc, node_ptr); |
| 1790 | if (node == NULL) { |
| 1791 | binder_user_error("binder: %d:%d " |
| 1792 | "%s u%p no match\n", |
| 1793 | proc->pid, thread->pid, |
| 1794 | cmd == BC_INCREFS_DONE ? |
| 1795 | "BC_INCREFS_DONE" : |
| 1796 | "BC_ACQUIRE_DONE", |
| 1797 | node_ptr); |
| 1798 | break; |
| 1799 | } |
| 1800 | if (cookie != node->cookie) { |
| 1801 | binder_user_error("binder: %d:%d %s u%p node %d" |
| 1802 | " cookie mismatch %p != %p\n", |
| 1803 | proc->pid, thread->pid, |
| 1804 | cmd == BC_INCREFS_DONE ? |
| 1805 | "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", |
| 1806 | node_ptr, node->debug_id, |
| 1807 | cookie, node->cookie); |
| 1808 | break; |
| 1809 | } |
| 1810 | if (cmd == BC_ACQUIRE_DONE) { |
| 1811 | if (node->pending_strong_ref == 0) { |
| 1812 | binder_user_error("binder: %d:%d " |
| 1813 | "BC_ACQUIRE_DONE node %d has " |
| 1814 | "no pending acquire request\n", |
| 1815 | proc->pid, thread->pid, |
| 1816 | node->debug_id); |
| 1817 | break; |
| 1818 | } |
| 1819 | node->pending_strong_ref = 0; |
| 1820 | } else { |
| 1821 | if (node->pending_weak_ref == 0) { |
| 1822 | binder_user_error("binder: %d:%d " |
| 1823 | "BC_INCREFS_DONE node %d has " |
| 1824 | "no pending increfs request\n", |
| 1825 | proc->pid, thread->pid, |
| 1826 | node->debug_id); |
| 1827 | break; |
| 1828 | } |
| 1829 | node->pending_weak_ref = 0; |
| 1830 | } |
| 1831 | binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0); |
| 1832 | binder_debug(BINDER_DEBUG_USER_REFS, |
| 1833 | "binder: %d:%d %s node %d ls %d lw %d\n", |
| 1834 | proc->pid, thread->pid, |
| 1835 | cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", |
| 1836 | node->debug_id, node->local_strong_refs, node->local_weak_refs); |
| 1837 | break; |
| 1838 | } |
| 1839 | case BC_ATTEMPT_ACQUIRE: |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 1840 | pr_err("binder: BC_ATTEMPT_ACQUIRE not supported\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1841 | return -EINVAL; |
| 1842 | case BC_ACQUIRE_RESULT: |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 1843 | pr_err("binder: BC_ACQUIRE_RESULT not supported\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1844 | return -EINVAL; |
| 1845 | |
| 1846 | case BC_FREE_BUFFER: { |
| 1847 | void __user *data_ptr; |
| 1848 | struct binder_buffer *buffer; |
| 1849 | |
| 1850 | if (get_user(data_ptr, (void * __user *)ptr)) |
| 1851 | return -EFAULT; |
| 1852 | ptr += sizeof(void *); |
| 1853 | |
| 1854 | buffer = binder_buffer_lookup(proc, data_ptr); |
| 1855 | if (buffer == NULL) { |
| 1856 | binder_user_error("binder: %d:%d " |
| 1857 | "BC_FREE_BUFFER u%p no match\n", |
| 1858 | proc->pid, thread->pid, data_ptr); |
| 1859 | break; |
| 1860 | } |
| 1861 | if (!buffer->allow_user_free) { |
| 1862 | binder_user_error("binder: %d:%d " |
| 1863 | "BC_FREE_BUFFER u%p matched " |
| 1864 | "unreturned buffer\n", |
| 1865 | proc->pid, thread->pid, data_ptr); |
| 1866 | break; |
| 1867 | } |
| 1868 | binder_debug(BINDER_DEBUG_FREE_BUFFER, |
| 1869 | "binder: %d:%d BC_FREE_BUFFER u%p found buffer %d for %s transaction\n", |
| 1870 | proc->pid, thread->pid, data_ptr, buffer->debug_id, |
| 1871 | buffer->transaction ? "active" : "finished"); |
| 1872 | |
| 1873 | if (buffer->transaction) { |
| 1874 | buffer->transaction->buffer = NULL; |
| 1875 | buffer->transaction = NULL; |
| 1876 | } |
| 1877 | if (buffer->async_transaction && buffer->target_node) { |
| 1878 | BUG_ON(!buffer->target_node->has_async_transaction); |
| 1879 | if (list_empty(&buffer->target_node->async_todo)) |
| 1880 | buffer->target_node->has_async_transaction = 0; |
| 1881 | else |
| 1882 | list_move_tail(buffer->target_node->async_todo.next, &thread->todo); |
| 1883 | } |
| 1884 | binder_transaction_buffer_release(proc, buffer, NULL); |
| 1885 | binder_free_buf(proc, buffer); |
| 1886 | break; |
| 1887 | } |
| 1888 | |
| 1889 | case BC_TRANSACTION: |
| 1890 | case BC_REPLY: { |
| 1891 | struct binder_transaction_data tr; |
| 1892 | |
| 1893 | if (copy_from_user(&tr, ptr, sizeof(tr))) |
| 1894 | return -EFAULT; |
| 1895 | ptr += sizeof(tr); |
| 1896 | binder_transaction(proc, thread, &tr, cmd == BC_REPLY); |
| 1897 | break; |
| 1898 | } |
| 1899 | |
| 1900 | case BC_REGISTER_LOOPER: |
| 1901 | binder_debug(BINDER_DEBUG_THREADS, |
| 1902 | "binder: %d:%d BC_REGISTER_LOOPER\n", |
| 1903 | proc->pid, thread->pid); |
| 1904 | if (thread->looper & BINDER_LOOPER_STATE_ENTERED) { |
| 1905 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
| 1906 | binder_user_error("binder: %d:%d ERROR:" |
| 1907 | " BC_REGISTER_LOOPER called " |
| 1908 | "after BC_ENTER_LOOPER\n", |
| 1909 | proc->pid, thread->pid); |
| 1910 | } else if (proc->requested_threads == 0) { |
| 1911 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
| 1912 | binder_user_error("binder: %d:%d ERROR:" |
| 1913 | " BC_REGISTER_LOOPER called " |
| 1914 | "without request\n", |
| 1915 | proc->pid, thread->pid); |
| 1916 | } else { |
| 1917 | proc->requested_threads--; |
| 1918 | proc->requested_threads_started++; |
| 1919 | } |
| 1920 | thread->looper |= BINDER_LOOPER_STATE_REGISTERED; |
| 1921 | break; |
| 1922 | case BC_ENTER_LOOPER: |
| 1923 | binder_debug(BINDER_DEBUG_THREADS, |
| 1924 | "binder: %d:%d BC_ENTER_LOOPER\n", |
| 1925 | proc->pid, thread->pid); |
| 1926 | if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) { |
| 1927 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
| 1928 | binder_user_error("binder: %d:%d ERROR:" |
| 1929 | " BC_ENTER_LOOPER called after " |
| 1930 | "BC_REGISTER_LOOPER\n", |
| 1931 | proc->pid, thread->pid); |
| 1932 | } |
| 1933 | thread->looper |= BINDER_LOOPER_STATE_ENTERED; |
| 1934 | break; |
| 1935 | case BC_EXIT_LOOPER: |
| 1936 | binder_debug(BINDER_DEBUG_THREADS, |
| 1937 | "binder: %d:%d BC_EXIT_LOOPER\n", |
| 1938 | proc->pid, thread->pid); |
| 1939 | thread->looper |= BINDER_LOOPER_STATE_EXITED; |
| 1940 | break; |
| 1941 | |
| 1942 | case BC_REQUEST_DEATH_NOTIFICATION: |
| 1943 | case BC_CLEAR_DEATH_NOTIFICATION: { |
| 1944 | uint32_t target; |
| 1945 | void __user *cookie; |
| 1946 | struct binder_ref *ref; |
| 1947 | struct binder_ref_death *death; |
| 1948 | |
| 1949 | if (get_user(target, (uint32_t __user *)ptr)) |
| 1950 | return -EFAULT; |
| 1951 | ptr += sizeof(uint32_t); |
| 1952 | if (get_user(cookie, (void __user * __user *)ptr)) |
| 1953 | return -EFAULT; |
| 1954 | ptr += sizeof(void *); |
| 1955 | ref = binder_get_ref(proc, target); |
| 1956 | if (ref == NULL) { |
| 1957 | binder_user_error("binder: %d:%d %s " |
| 1958 | "invalid ref %d\n", |
| 1959 | proc->pid, thread->pid, |
| 1960 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? |
| 1961 | "BC_REQUEST_DEATH_NOTIFICATION" : |
| 1962 | "BC_CLEAR_DEATH_NOTIFICATION", |
| 1963 | target); |
| 1964 | break; |
| 1965 | } |
| 1966 | |
| 1967 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, |
| 1968 | "binder: %d:%d %s %p ref %d desc %d s %d w %d for node %d\n", |
| 1969 | proc->pid, thread->pid, |
| 1970 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? |
| 1971 | "BC_REQUEST_DEATH_NOTIFICATION" : |
| 1972 | "BC_CLEAR_DEATH_NOTIFICATION", |
| 1973 | cookie, ref->debug_id, ref->desc, |
| 1974 | ref->strong, ref->weak, ref->node->debug_id); |
| 1975 | |
| 1976 | if (cmd == BC_REQUEST_DEATH_NOTIFICATION) { |
| 1977 | if (ref->death) { |
| 1978 | binder_user_error("binder: %d:%" |
| 1979 | "d BC_REQUEST_DEATH_NOTI" |
| 1980 | "FICATION death notific" |
| 1981 | "ation already set\n", |
| 1982 | proc->pid, thread->pid); |
| 1983 | break; |
| 1984 | } |
| 1985 | death = kzalloc(sizeof(*death), GFP_KERNEL); |
| 1986 | if (death == NULL) { |
| 1987 | thread->return_error = BR_ERROR; |
| 1988 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
| 1989 | "binder: %d:%d " |
| 1990 | "BC_REQUEST_DEATH_NOTIFICATION failed\n", |
| 1991 | proc->pid, thread->pid); |
| 1992 | break; |
| 1993 | } |
| 1994 | binder_stats_created(BINDER_STAT_DEATH); |
| 1995 | INIT_LIST_HEAD(&death->work.entry); |
| 1996 | death->cookie = cookie; |
| 1997 | ref->death = death; |
| 1998 | if (ref->node->proc == NULL) { |
| 1999 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; |
| 2000 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 2001 | list_add_tail(&ref->death->work.entry, &thread->todo); |
| 2002 | } else { |
| 2003 | list_add_tail(&ref->death->work.entry, &proc->todo); |
| 2004 | wake_up_interruptible(&proc->wait); |
| 2005 | } |
| 2006 | } |
| 2007 | } else { |
| 2008 | if (ref->death == NULL) { |
| 2009 | binder_user_error("binder: %d:%" |
| 2010 | "d BC_CLEAR_DEATH_NOTIFI" |
| 2011 | "CATION death notificat" |
| 2012 | "ion not active\n", |
| 2013 | proc->pid, thread->pid); |
| 2014 | break; |
| 2015 | } |
| 2016 | death = ref->death; |
| 2017 | if (death->cookie != cookie) { |
| 2018 | binder_user_error("binder: %d:%" |
| 2019 | "d BC_CLEAR_DEATH_NOTIFI" |
| 2020 | "CATION death notificat" |
| 2021 | "ion cookie mismatch " |
| 2022 | "%p != %p\n", |
| 2023 | proc->pid, thread->pid, |
| 2024 | death->cookie, cookie); |
| 2025 | break; |
| 2026 | } |
| 2027 | ref->death = NULL; |
| 2028 | if (list_empty(&death->work.entry)) { |
| 2029 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; |
| 2030 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 2031 | list_add_tail(&death->work.entry, &thread->todo); |
| 2032 | } else { |
| 2033 | list_add_tail(&death->work.entry, &proc->todo); |
| 2034 | wake_up_interruptible(&proc->wait); |
| 2035 | } |
| 2036 | } else { |
| 2037 | BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER); |
| 2038 | death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR; |
| 2039 | } |
| 2040 | } |
| 2041 | } break; |
| 2042 | case BC_DEAD_BINDER_DONE: { |
| 2043 | struct binder_work *w; |
| 2044 | void __user *cookie; |
| 2045 | struct binder_ref_death *death = NULL; |
| 2046 | if (get_user(cookie, (void __user * __user *)ptr)) |
| 2047 | return -EFAULT; |
| 2048 | |
| 2049 | ptr += sizeof(void *); |
| 2050 | list_for_each_entry(w, &proc->delivered_death, entry) { |
| 2051 | struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work); |
| 2052 | if (tmp_death->cookie == cookie) { |
| 2053 | death = tmp_death; |
| 2054 | break; |
| 2055 | } |
| 2056 | } |
| 2057 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 2058 | "binder: %d:%d BC_DEAD_BINDER_DONE %p found %p\n", |
| 2059 | proc->pid, thread->pid, cookie, death); |
| 2060 | if (death == NULL) { |
| 2061 | binder_user_error("binder: %d:%d BC_DEAD" |
| 2062 | "_BINDER_DONE %p not found\n", |
| 2063 | proc->pid, thread->pid, cookie); |
| 2064 | break; |
| 2065 | } |
| 2066 | |
| 2067 | list_del_init(&death->work.entry); |
| 2068 | if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) { |
| 2069 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; |
| 2070 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 2071 | list_add_tail(&death->work.entry, &thread->todo); |
| 2072 | } else { |
| 2073 | list_add_tail(&death->work.entry, &proc->todo); |
| 2074 | wake_up_interruptible(&proc->wait); |
| 2075 | } |
| 2076 | } |
| 2077 | } break; |
| 2078 | |
| 2079 | default: |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2080 | pr_err("binder: %d:%d unknown command %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2081 | proc->pid, thread->pid, cmd); |
| 2082 | return -EINVAL; |
| 2083 | } |
| 2084 | *consumed = ptr - buffer; |
| 2085 | } |
| 2086 | return 0; |
| 2087 | } |
| 2088 | |
| 2089 | void binder_stat_br(struct binder_proc *proc, struct binder_thread *thread, |
| 2090 | uint32_t cmd) |
| 2091 | { |
| 2092 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) { |
| 2093 | binder_stats.br[_IOC_NR(cmd)]++; |
| 2094 | proc->stats.br[_IOC_NR(cmd)]++; |
| 2095 | thread->stats.br[_IOC_NR(cmd)]++; |
| 2096 | } |
| 2097 | } |
| 2098 | |
| 2099 | static int binder_has_proc_work(struct binder_proc *proc, |
| 2100 | struct binder_thread *thread) |
| 2101 | { |
| 2102 | return !list_empty(&proc->todo) || |
| 2103 | (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); |
| 2104 | } |
| 2105 | |
| 2106 | static int binder_has_thread_work(struct binder_thread *thread) |
| 2107 | { |
| 2108 | return !list_empty(&thread->todo) || thread->return_error != BR_OK || |
| 2109 | (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); |
| 2110 | } |
| 2111 | |
| 2112 | static int binder_thread_read(struct binder_proc *proc, |
| 2113 | struct binder_thread *thread, |
| 2114 | void __user *buffer, int size, |
| 2115 | signed long *consumed, int non_block) |
| 2116 | { |
| 2117 | void __user *ptr = buffer + *consumed; |
| 2118 | void __user *end = buffer + size; |
| 2119 | |
| 2120 | int ret = 0; |
| 2121 | int wait_for_proc_work; |
| 2122 | |
| 2123 | if (*consumed == 0) { |
| 2124 | if (put_user(BR_NOOP, (uint32_t __user *)ptr)) |
| 2125 | return -EFAULT; |
| 2126 | ptr += sizeof(uint32_t); |
| 2127 | } |
| 2128 | |
| 2129 | retry: |
| 2130 | wait_for_proc_work = thread->transaction_stack == NULL && |
| 2131 | list_empty(&thread->todo); |
| 2132 | |
| 2133 | if (thread->return_error != BR_OK && ptr < end) { |
| 2134 | if (thread->return_error2 != BR_OK) { |
| 2135 | if (put_user(thread->return_error2, (uint32_t __user *)ptr)) |
| 2136 | return -EFAULT; |
| 2137 | ptr += sizeof(uint32_t); |
| 2138 | if (ptr == end) |
| 2139 | goto done; |
| 2140 | thread->return_error2 = BR_OK; |
| 2141 | } |
| 2142 | if (put_user(thread->return_error, (uint32_t __user *)ptr)) |
| 2143 | return -EFAULT; |
| 2144 | ptr += sizeof(uint32_t); |
| 2145 | thread->return_error = BR_OK; |
| 2146 | goto done; |
| 2147 | } |
| 2148 | |
| 2149 | |
| 2150 | thread->looper |= BINDER_LOOPER_STATE_WAITING; |
| 2151 | if (wait_for_proc_work) |
| 2152 | proc->ready_threads++; |
| 2153 | mutex_unlock(&binder_lock); |
| 2154 | if (wait_for_proc_work) { |
| 2155 | if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED | |
| 2156 | BINDER_LOOPER_STATE_ENTERED))) { |
| 2157 | binder_user_error("binder: %d:%d ERROR: Thread waiting " |
| 2158 | "for process work before calling BC_REGISTER_" |
| 2159 | "LOOPER or BC_ENTER_LOOPER (state %x)\n", |
| 2160 | proc->pid, thread->pid, thread->looper); |
| 2161 | wait_event_interruptible(binder_user_error_wait, |
| 2162 | binder_stop_on_user_error < 2); |
| 2163 | } |
| 2164 | binder_set_nice(proc->default_priority); |
| 2165 | if (non_block) { |
| 2166 | if (!binder_has_proc_work(proc, thread)) |
| 2167 | ret = -EAGAIN; |
| 2168 | } else |
| 2169 | ret = wait_event_interruptible_exclusive(proc->wait, binder_has_proc_work(proc, thread)); |
| 2170 | } else { |
| 2171 | if (non_block) { |
| 2172 | if (!binder_has_thread_work(thread)) |
| 2173 | ret = -EAGAIN; |
| 2174 | } else |
| 2175 | ret = wait_event_interruptible(thread->wait, binder_has_thread_work(thread)); |
| 2176 | } |
| 2177 | mutex_lock(&binder_lock); |
| 2178 | if (wait_for_proc_work) |
| 2179 | proc->ready_threads--; |
| 2180 | thread->looper &= ~BINDER_LOOPER_STATE_WAITING; |
| 2181 | |
| 2182 | if (ret) |
| 2183 | return ret; |
| 2184 | |
| 2185 | while (1) { |
| 2186 | uint32_t cmd; |
| 2187 | struct binder_transaction_data tr; |
| 2188 | struct binder_work *w; |
| 2189 | struct binder_transaction *t = NULL; |
| 2190 | |
| 2191 | if (!list_empty(&thread->todo)) |
| 2192 | w = list_first_entry(&thread->todo, struct binder_work, entry); |
| 2193 | else if (!list_empty(&proc->todo) && wait_for_proc_work) |
| 2194 | w = list_first_entry(&proc->todo, struct binder_work, entry); |
| 2195 | else { |
| 2196 | if (ptr - buffer == 4 && !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) /* no data added */ |
| 2197 | goto retry; |
| 2198 | break; |
| 2199 | } |
| 2200 | |
| 2201 | if (end - ptr < sizeof(tr) + 4) |
| 2202 | break; |
| 2203 | |
| 2204 | switch (w->type) { |
| 2205 | case BINDER_WORK_TRANSACTION: { |
| 2206 | t = container_of(w, struct binder_transaction, work); |
| 2207 | } break; |
| 2208 | case BINDER_WORK_TRANSACTION_COMPLETE: { |
| 2209 | cmd = BR_TRANSACTION_COMPLETE; |
| 2210 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2211 | return -EFAULT; |
| 2212 | ptr += sizeof(uint32_t); |
| 2213 | |
| 2214 | binder_stat_br(proc, thread, cmd); |
| 2215 | binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE, |
| 2216 | "binder: %d:%d BR_TRANSACTION_COMPLETE\n", |
| 2217 | proc->pid, thread->pid); |
| 2218 | |
| 2219 | list_del(&w->entry); |
| 2220 | kfree(w); |
| 2221 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 2222 | } break; |
| 2223 | case BINDER_WORK_NODE: { |
| 2224 | struct binder_node *node = container_of(w, struct binder_node, work); |
| 2225 | uint32_t cmd = BR_NOOP; |
| 2226 | const char *cmd_name; |
| 2227 | int strong = node->internal_strong_refs || node->local_strong_refs; |
| 2228 | int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong; |
| 2229 | if (weak && !node->has_weak_ref) { |
| 2230 | cmd = BR_INCREFS; |
| 2231 | cmd_name = "BR_INCREFS"; |
| 2232 | node->has_weak_ref = 1; |
| 2233 | node->pending_weak_ref = 1; |
| 2234 | node->local_weak_refs++; |
| 2235 | } else if (strong && !node->has_strong_ref) { |
| 2236 | cmd = BR_ACQUIRE; |
| 2237 | cmd_name = "BR_ACQUIRE"; |
| 2238 | node->has_strong_ref = 1; |
| 2239 | node->pending_strong_ref = 1; |
| 2240 | node->local_strong_refs++; |
| 2241 | } else if (!strong && node->has_strong_ref) { |
| 2242 | cmd = BR_RELEASE; |
| 2243 | cmd_name = "BR_RELEASE"; |
| 2244 | node->has_strong_ref = 0; |
| 2245 | } else if (!weak && node->has_weak_ref) { |
| 2246 | cmd = BR_DECREFS; |
| 2247 | cmd_name = "BR_DECREFS"; |
| 2248 | node->has_weak_ref = 0; |
| 2249 | } |
| 2250 | if (cmd != BR_NOOP) { |
| 2251 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2252 | return -EFAULT; |
| 2253 | ptr += sizeof(uint32_t); |
| 2254 | if (put_user(node->ptr, (void * __user *)ptr)) |
| 2255 | return -EFAULT; |
| 2256 | ptr += sizeof(void *); |
| 2257 | if (put_user(node->cookie, (void * __user *)ptr)) |
| 2258 | return -EFAULT; |
| 2259 | ptr += sizeof(void *); |
| 2260 | |
| 2261 | binder_stat_br(proc, thread, cmd); |
| 2262 | binder_debug(BINDER_DEBUG_USER_REFS, |
| 2263 | "binder: %d:%d %s %d u%p c%p\n", |
| 2264 | proc->pid, thread->pid, cmd_name, node->debug_id, node->ptr, node->cookie); |
| 2265 | } else { |
| 2266 | list_del_init(&w->entry); |
| 2267 | if (!weak && !strong) { |
| 2268 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
| 2269 | "binder: %d:%d node %d u%p c%p deleted\n", |
| 2270 | proc->pid, thread->pid, node->debug_id, |
| 2271 | node->ptr, node->cookie); |
| 2272 | rb_erase(&node->rb_node, &proc->nodes); |
| 2273 | kfree(node); |
| 2274 | binder_stats_deleted(BINDER_STAT_NODE); |
| 2275 | } else { |
| 2276 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
| 2277 | "binder: %d:%d node %d u%p c%p state unchanged\n", |
| 2278 | proc->pid, thread->pid, node->debug_id, node->ptr, |
| 2279 | node->cookie); |
| 2280 | } |
| 2281 | } |
| 2282 | } break; |
| 2283 | case BINDER_WORK_DEAD_BINDER: |
| 2284 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
| 2285 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { |
| 2286 | struct binder_ref_death *death; |
| 2287 | uint32_t cmd; |
| 2288 | |
| 2289 | death = container_of(w, struct binder_ref_death, work); |
| 2290 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) |
| 2291 | cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE; |
| 2292 | else |
| 2293 | cmd = BR_DEAD_BINDER; |
| 2294 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2295 | return -EFAULT; |
| 2296 | ptr += sizeof(uint32_t); |
| 2297 | if (put_user(death->cookie, (void * __user *)ptr)) |
| 2298 | return -EFAULT; |
| 2299 | ptr += sizeof(void *); |
| 2300 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, |
| 2301 | "binder: %d:%d %s %p\n", |
| 2302 | proc->pid, thread->pid, |
| 2303 | cmd == BR_DEAD_BINDER ? |
| 2304 | "BR_DEAD_BINDER" : |
| 2305 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", |
| 2306 | death->cookie); |
| 2307 | |
| 2308 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) { |
| 2309 | list_del(&w->entry); |
| 2310 | kfree(death); |
| 2311 | binder_stats_deleted(BINDER_STAT_DEATH); |
| 2312 | } else |
| 2313 | list_move(&w->entry, &proc->delivered_death); |
| 2314 | if (cmd == BR_DEAD_BINDER) |
| 2315 | goto done; /* DEAD_BINDER notifications can cause transactions */ |
| 2316 | } break; |
| 2317 | } |
| 2318 | |
| 2319 | if (!t) |
| 2320 | continue; |
| 2321 | |
| 2322 | BUG_ON(t->buffer == NULL); |
| 2323 | if (t->buffer->target_node) { |
| 2324 | struct binder_node *target_node = t->buffer->target_node; |
| 2325 | tr.target.ptr = target_node->ptr; |
| 2326 | tr.cookie = target_node->cookie; |
| 2327 | t->saved_priority = task_nice(current); |
| 2328 | if (t->priority < target_node->min_priority && |
| 2329 | !(t->flags & TF_ONE_WAY)) |
| 2330 | binder_set_nice(t->priority); |
| 2331 | else if (!(t->flags & TF_ONE_WAY) || |
| 2332 | t->saved_priority > target_node->min_priority) |
| 2333 | binder_set_nice(target_node->min_priority); |
| 2334 | cmd = BR_TRANSACTION; |
| 2335 | } else { |
| 2336 | tr.target.ptr = NULL; |
| 2337 | tr.cookie = NULL; |
| 2338 | cmd = BR_REPLY; |
| 2339 | } |
| 2340 | tr.code = t->code; |
| 2341 | tr.flags = t->flags; |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 2342 | tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2343 | |
| 2344 | if (t->from) { |
| 2345 | struct task_struct *sender = t->from->proc->tsk; |
| 2346 | tr.sender_pid = task_tgid_nr_ns(sender, |
| 2347 | current->nsproxy->pid_ns); |
| 2348 | } else { |
| 2349 | tr.sender_pid = 0; |
| 2350 | } |
| 2351 | |
| 2352 | tr.data_size = t->buffer->data_size; |
| 2353 | tr.offsets_size = t->buffer->offsets_size; |
| 2354 | tr.data.ptr.buffer = (void *)t->buffer->data + |
| 2355 | proc->user_buffer_offset; |
| 2356 | tr.data.ptr.offsets = tr.data.ptr.buffer + |
| 2357 | ALIGN(t->buffer->data_size, |
| 2358 | sizeof(void *)); |
| 2359 | |
| 2360 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2361 | return -EFAULT; |
| 2362 | ptr += sizeof(uint32_t); |
| 2363 | if (copy_to_user(ptr, &tr, sizeof(tr))) |
| 2364 | return -EFAULT; |
| 2365 | ptr += sizeof(tr); |
| 2366 | |
| 2367 | binder_stat_br(proc, thread, cmd); |
| 2368 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 2369 | "binder: %d:%d %s %d %d:%d, cmd %d" |
| 2370 | "size %zd-%zd ptr %p-%p\n", |
| 2371 | proc->pid, thread->pid, |
| 2372 | (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" : |
| 2373 | "BR_REPLY", |
| 2374 | t->debug_id, t->from ? t->from->proc->pid : 0, |
| 2375 | t->from ? t->from->pid : 0, cmd, |
| 2376 | t->buffer->data_size, t->buffer->offsets_size, |
| 2377 | tr.data.ptr.buffer, tr.data.ptr.offsets); |
| 2378 | |
| 2379 | list_del(&t->work.entry); |
| 2380 | t->buffer->allow_user_free = 1; |
| 2381 | if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) { |
| 2382 | t->to_parent = thread->transaction_stack; |
| 2383 | t->to_thread = thread; |
| 2384 | thread->transaction_stack = t; |
| 2385 | } else { |
| 2386 | t->buffer->transaction = NULL; |
| 2387 | kfree(t); |
| 2388 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 2389 | } |
| 2390 | break; |
| 2391 | } |
| 2392 | |
| 2393 | done: |
| 2394 | |
| 2395 | *consumed = ptr - buffer; |
| 2396 | if (proc->requested_threads + proc->ready_threads == 0 && |
| 2397 | proc->requested_threads_started < proc->max_threads && |
| 2398 | (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | |
| 2399 | BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */ |
| 2400 | /*spawn a new thread if we leave this out */) { |
| 2401 | proc->requested_threads++; |
| 2402 | binder_debug(BINDER_DEBUG_THREADS, |
| 2403 | "binder: %d:%d BR_SPAWN_LOOPER\n", |
| 2404 | proc->pid, thread->pid); |
| 2405 | if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer)) |
| 2406 | return -EFAULT; |
| 2407 | } |
| 2408 | return 0; |
| 2409 | } |
| 2410 | |
| 2411 | static void binder_release_work(struct list_head *list) |
| 2412 | { |
| 2413 | struct binder_work *w; |
| 2414 | while (!list_empty(list)) { |
| 2415 | w = list_first_entry(list, struct binder_work, entry); |
| 2416 | list_del_init(&w->entry); |
| 2417 | switch (w->type) { |
| 2418 | case BINDER_WORK_TRANSACTION: { |
| 2419 | struct binder_transaction *t; |
| 2420 | |
| 2421 | t = container_of(w, struct binder_transaction, work); |
| 2422 | if (t->buffer->target_node && !(t->flags & TF_ONE_WAY)) |
| 2423 | binder_send_failed_reply(t, BR_DEAD_REPLY); |
| 2424 | } break; |
| 2425 | case BINDER_WORK_TRANSACTION_COMPLETE: { |
| 2426 | kfree(w); |
| 2427 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 2428 | } break; |
| 2429 | default: |
| 2430 | break; |
| 2431 | } |
| 2432 | } |
| 2433 | |
| 2434 | } |
| 2435 | |
| 2436 | static struct binder_thread *binder_get_thread(struct binder_proc *proc) |
| 2437 | { |
| 2438 | struct binder_thread *thread = NULL; |
| 2439 | struct rb_node *parent = NULL; |
| 2440 | struct rb_node **p = &proc->threads.rb_node; |
| 2441 | |
| 2442 | while (*p) { |
| 2443 | parent = *p; |
| 2444 | thread = rb_entry(parent, struct binder_thread, rb_node); |
| 2445 | |
| 2446 | if (current->pid < thread->pid) |
| 2447 | p = &(*p)->rb_left; |
| 2448 | else if (current->pid > thread->pid) |
| 2449 | p = &(*p)->rb_right; |
| 2450 | else |
| 2451 | break; |
| 2452 | } |
| 2453 | if (*p == NULL) { |
| 2454 | thread = kzalloc(sizeof(*thread), GFP_KERNEL); |
| 2455 | if (thread == NULL) |
| 2456 | return NULL; |
| 2457 | binder_stats_created(BINDER_STAT_THREAD); |
| 2458 | thread->proc = proc; |
| 2459 | thread->pid = current->pid; |
| 2460 | init_waitqueue_head(&thread->wait); |
| 2461 | INIT_LIST_HEAD(&thread->todo); |
| 2462 | rb_link_node(&thread->rb_node, parent, p); |
| 2463 | rb_insert_color(&thread->rb_node, &proc->threads); |
| 2464 | thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; |
| 2465 | thread->return_error = BR_OK; |
| 2466 | thread->return_error2 = BR_OK; |
| 2467 | } |
| 2468 | return thread; |
| 2469 | } |
| 2470 | |
| 2471 | static int binder_free_thread(struct binder_proc *proc, |
| 2472 | struct binder_thread *thread) |
| 2473 | { |
| 2474 | struct binder_transaction *t; |
| 2475 | struct binder_transaction *send_reply = NULL; |
| 2476 | int active_transactions = 0; |
| 2477 | |
| 2478 | rb_erase(&thread->rb_node, &proc->threads); |
| 2479 | t = thread->transaction_stack; |
| 2480 | if (t && t->to_thread == thread) |
| 2481 | send_reply = t; |
| 2482 | while (t) { |
| 2483 | active_transactions++; |
| 2484 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
| 2485 | "binder: release %d:%d transaction %d " |
| 2486 | "%s, still active\n", proc->pid, thread->pid, |
| 2487 | t->debug_id, |
| 2488 | (t->to_thread == thread) ? "in" : "out"); |
| 2489 | |
| 2490 | if (t->to_thread == thread) { |
| 2491 | t->to_proc = NULL; |
| 2492 | t->to_thread = NULL; |
| 2493 | if (t->buffer) { |
| 2494 | t->buffer->transaction = NULL; |
| 2495 | t->buffer = NULL; |
| 2496 | } |
| 2497 | t = t->to_parent; |
| 2498 | } else if (t->from == thread) { |
| 2499 | t->from = NULL; |
| 2500 | t = t->from_parent; |
| 2501 | } else |
| 2502 | BUG(); |
| 2503 | } |
| 2504 | if (send_reply) |
| 2505 | binder_send_failed_reply(send_reply, BR_DEAD_REPLY); |
| 2506 | binder_release_work(&thread->todo); |
| 2507 | kfree(thread); |
| 2508 | binder_stats_deleted(BINDER_STAT_THREAD); |
| 2509 | return active_transactions; |
| 2510 | } |
| 2511 | |
| 2512 | static unsigned int binder_poll(struct file *filp, |
| 2513 | struct poll_table_struct *wait) |
| 2514 | { |
| 2515 | struct binder_proc *proc = filp->private_data; |
| 2516 | struct binder_thread *thread = NULL; |
| 2517 | int wait_for_proc_work; |
| 2518 | |
| 2519 | mutex_lock(&binder_lock); |
| 2520 | thread = binder_get_thread(proc); |
| 2521 | |
| 2522 | wait_for_proc_work = thread->transaction_stack == NULL && |
| 2523 | list_empty(&thread->todo) && thread->return_error == BR_OK; |
| 2524 | mutex_unlock(&binder_lock); |
| 2525 | |
| 2526 | if (wait_for_proc_work) { |
| 2527 | if (binder_has_proc_work(proc, thread)) |
| 2528 | return POLLIN; |
| 2529 | poll_wait(filp, &proc->wait, wait); |
| 2530 | if (binder_has_proc_work(proc, thread)) |
| 2531 | return POLLIN; |
| 2532 | } else { |
| 2533 | if (binder_has_thread_work(thread)) |
| 2534 | return POLLIN; |
| 2535 | poll_wait(filp, &thread->wait, wait); |
| 2536 | if (binder_has_thread_work(thread)) |
| 2537 | return POLLIN; |
| 2538 | } |
| 2539 | return 0; |
| 2540 | } |
| 2541 | |
| 2542 | static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 2543 | { |
| 2544 | int ret; |
| 2545 | struct binder_proc *proc = filp->private_data; |
| 2546 | struct binder_thread *thread; |
| 2547 | unsigned int size = _IOC_SIZE(cmd); |
| 2548 | void __user *ubuf = (void __user *)arg; |
| 2549 | |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2550 | /*pr_info("binder_ioctl: %d:%d %x %lx\n", proc->pid, current->pid, cmd, arg);*/ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2551 | |
| 2552 | ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
| 2553 | if (ret) |
| 2554 | return ret; |
| 2555 | |
| 2556 | mutex_lock(&binder_lock); |
| 2557 | thread = binder_get_thread(proc); |
| 2558 | if (thread == NULL) { |
| 2559 | ret = -ENOMEM; |
| 2560 | goto err; |
| 2561 | } |
| 2562 | |
| 2563 | switch (cmd) { |
| 2564 | case BINDER_WRITE_READ: { |
| 2565 | struct binder_write_read bwr; |
| 2566 | if (size != sizeof(struct binder_write_read)) { |
| 2567 | ret = -EINVAL; |
| 2568 | goto err; |
| 2569 | } |
| 2570 | if (copy_from_user(&bwr, ubuf, sizeof(bwr))) { |
| 2571 | ret = -EFAULT; |
| 2572 | goto err; |
| 2573 | } |
| 2574 | binder_debug(BINDER_DEBUG_READ_WRITE, |
| 2575 | "binder: %d:%d write %ld at %08lx, read %ld at %08lx\n", |
| 2576 | proc->pid, thread->pid, bwr.write_size, bwr.write_buffer, |
| 2577 | bwr.read_size, bwr.read_buffer); |
| 2578 | |
| 2579 | if (bwr.write_size > 0) { |
| 2580 | ret = binder_thread_write(proc, thread, (void __user *)bwr.write_buffer, bwr.write_size, &bwr.write_consumed); |
| 2581 | if (ret < 0) { |
| 2582 | bwr.read_consumed = 0; |
| 2583 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) |
| 2584 | ret = -EFAULT; |
| 2585 | goto err; |
| 2586 | } |
| 2587 | } |
| 2588 | if (bwr.read_size > 0) { |
| 2589 | ret = binder_thread_read(proc, thread, (void __user *)bwr.read_buffer, bwr.read_size, &bwr.read_consumed, filp->f_flags & O_NONBLOCK); |
| 2590 | if (!list_empty(&proc->todo)) |
| 2591 | wake_up_interruptible(&proc->wait); |
| 2592 | if (ret < 0) { |
| 2593 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) |
| 2594 | ret = -EFAULT; |
| 2595 | goto err; |
| 2596 | } |
| 2597 | } |
| 2598 | binder_debug(BINDER_DEBUG_READ_WRITE, |
| 2599 | "binder: %d:%d wrote %ld of %ld, read return %ld of %ld\n", |
| 2600 | proc->pid, thread->pid, bwr.write_consumed, bwr.write_size, |
| 2601 | bwr.read_consumed, bwr.read_size); |
| 2602 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) { |
| 2603 | ret = -EFAULT; |
| 2604 | goto err; |
| 2605 | } |
| 2606 | break; |
| 2607 | } |
| 2608 | case BINDER_SET_MAX_THREADS: |
| 2609 | if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) { |
| 2610 | ret = -EINVAL; |
| 2611 | goto err; |
| 2612 | } |
| 2613 | break; |
| 2614 | case BINDER_SET_CONTEXT_MGR: |
| 2615 | if (binder_context_mgr_node != NULL) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2616 | pr_err("binder: BINDER_SET_CONTEXT_MGR already set\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2617 | ret = -EBUSY; |
| 2618 | goto err; |
| 2619 | } |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 2620 | if (uid_valid(binder_context_mgr_uid)) { |
| 2621 | if (!uid_eq(binder_context_mgr_uid, current->cred->euid)) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2622 | pr_err("binder: BINDER_SET_" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2623 | "CONTEXT_MGR bad uid %d != %d\n", |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 2624 | from_kuid(&init_user_ns, current->cred->euid), |
| 2625 | from_kuid(&init_user_ns, binder_context_mgr_uid)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2626 | ret = -EPERM; |
| 2627 | goto err; |
| 2628 | } |
| 2629 | } else |
| 2630 | binder_context_mgr_uid = current->cred->euid; |
| 2631 | binder_context_mgr_node = binder_new_node(proc, NULL, NULL); |
| 2632 | if (binder_context_mgr_node == NULL) { |
| 2633 | ret = -ENOMEM; |
| 2634 | goto err; |
| 2635 | } |
| 2636 | binder_context_mgr_node->local_weak_refs++; |
| 2637 | binder_context_mgr_node->local_strong_refs++; |
| 2638 | binder_context_mgr_node->has_strong_ref = 1; |
| 2639 | binder_context_mgr_node->has_weak_ref = 1; |
| 2640 | break; |
| 2641 | case BINDER_THREAD_EXIT: |
| 2642 | binder_debug(BINDER_DEBUG_THREADS, "binder: %d:%d exit\n", |
| 2643 | proc->pid, thread->pid); |
| 2644 | binder_free_thread(proc, thread); |
| 2645 | thread = NULL; |
| 2646 | break; |
| 2647 | case BINDER_VERSION: |
| 2648 | if (size != sizeof(struct binder_version)) { |
| 2649 | ret = -EINVAL; |
| 2650 | goto err; |
| 2651 | } |
| 2652 | if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, &((struct binder_version *)ubuf)->protocol_version)) { |
| 2653 | ret = -EINVAL; |
| 2654 | goto err; |
| 2655 | } |
| 2656 | break; |
| 2657 | default: |
| 2658 | ret = -EINVAL; |
| 2659 | goto err; |
| 2660 | } |
| 2661 | ret = 0; |
| 2662 | err: |
| 2663 | if (thread) |
| 2664 | thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN; |
| 2665 | mutex_unlock(&binder_lock); |
| 2666 | wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
| 2667 | if (ret && ret != -ERESTARTSYS) |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2668 | pr_info("binder: %d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2669 | return ret; |
| 2670 | } |
| 2671 | |
| 2672 | static void binder_vma_open(struct vm_area_struct *vma) |
| 2673 | { |
| 2674 | struct binder_proc *proc = vma->vm_private_data; |
| 2675 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 2676 | "binder: %d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", |
| 2677 | proc->pid, vma->vm_start, vma->vm_end, |
| 2678 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, |
| 2679 | (unsigned long)pgprot_val(vma->vm_page_prot)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2680 | } |
| 2681 | |
| 2682 | static void binder_vma_close(struct vm_area_struct *vma) |
| 2683 | { |
| 2684 | struct binder_proc *proc = vma->vm_private_data; |
| 2685 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 2686 | "binder: %d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", |
| 2687 | proc->pid, vma->vm_start, vma->vm_end, |
| 2688 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, |
| 2689 | (unsigned long)pgprot_val(vma->vm_page_prot)); |
| 2690 | proc->vma = NULL; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 2691 | proc->vma_vm_mm = NULL; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2692 | binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES); |
| 2693 | } |
| 2694 | |
| 2695 | static struct vm_operations_struct binder_vm_ops = { |
| 2696 | .open = binder_vma_open, |
| 2697 | .close = binder_vma_close, |
| 2698 | }; |
| 2699 | |
| 2700 | static int binder_mmap(struct file *filp, struct vm_area_struct *vma) |
| 2701 | { |
| 2702 | int ret; |
| 2703 | struct vm_struct *area; |
| 2704 | struct binder_proc *proc = filp->private_data; |
| 2705 | const char *failure_string; |
| 2706 | struct binder_buffer *buffer; |
| 2707 | |
Al Viro | a79f41e | 2012-08-15 18:23:36 -0400 | [diff] [blame] | 2708 | if (proc->tsk != current) |
| 2709 | return -EINVAL; |
| 2710 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2711 | if ((vma->vm_end - vma->vm_start) > SZ_4M) |
| 2712 | vma->vm_end = vma->vm_start + SZ_4M; |
| 2713 | |
| 2714 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 2715 | "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n", |
| 2716 | proc->pid, vma->vm_start, vma->vm_end, |
| 2717 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, |
| 2718 | (unsigned long)pgprot_val(vma->vm_page_prot)); |
| 2719 | |
| 2720 | if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) { |
| 2721 | ret = -EPERM; |
| 2722 | failure_string = "bad vm_flags"; |
| 2723 | goto err_bad_arg; |
| 2724 | } |
| 2725 | vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE; |
| 2726 | |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 2727 | mutex_lock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2728 | if (proc->buffer) { |
| 2729 | ret = -EBUSY; |
| 2730 | failure_string = "already mapped"; |
| 2731 | goto err_already_mapped; |
| 2732 | } |
| 2733 | |
| 2734 | area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP); |
| 2735 | if (area == NULL) { |
| 2736 | ret = -ENOMEM; |
| 2737 | failure_string = "get_vm_area"; |
| 2738 | goto err_get_vm_area_failed; |
| 2739 | } |
| 2740 | proc->buffer = area->addr; |
| 2741 | proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer; |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 2742 | mutex_unlock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2743 | |
| 2744 | #ifdef CONFIG_CPU_CACHE_VIPT |
| 2745 | if (cache_is_vipt_aliasing()) { |
| 2746 | while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2747 | pr_info("binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2748 | vma->vm_start += PAGE_SIZE; |
| 2749 | } |
| 2750 | } |
| 2751 | #endif |
| 2752 | proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL); |
| 2753 | if (proc->pages == NULL) { |
| 2754 | ret = -ENOMEM; |
| 2755 | failure_string = "alloc page array"; |
| 2756 | goto err_alloc_pages_failed; |
| 2757 | } |
| 2758 | proc->buffer_size = vma->vm_end - vma->vm_start; |
| 2759 | |
| 2760 | vma->vm_ops = &binder_vm_ops; |
| 2761 | vma->vm_private_data = proc; |
| 2762 | |
| 2763 | if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) { |
| 2764 | ret = -ENOMEM; |
| 2765 | failure_string = "alloc small buf"; |
| 2766 | goto err_alloc_small_buf_failed; |
| 2767 | } |
| 2768 | buffer = proc->buffer; |
| 2769 | INIT_LIST_HEAD(&proc->buffers); |
| 2770 | list_add(&buffer->entry, &proc->buffers); |
| 2771 | buffer->free = 1; |
| 2772 | binder_insert_free_buffer(proc, buffer); |
| 2773 | proc->free_async_space = proc->buffer_size / 2; |
| 2774 | barrier(); |
Al Viro | a79f41e | 2012-08-15 18:23:36 -0400 | [diff] [blame] | 2775 | proc->files = get_files_struct(current); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2776 | proc->vma = vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 2777 | proc->vma_vm_mm = vma->vm_mm; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2778 | |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2779 | /*pr_info("binder_mmap: %d %lx-%lx maps %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2780 | proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/ |
| 2781 | return 0; |
| 2782 | |
| 2783 | err_alloc_small_buf_failed: |
| 2784 | kfree(proc->pages); |
| 2785 | proc->pages = NULL; |
| 2786 | err_alloc_pages_failed: |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 2787 | mutex_lock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2788 | vfree(proc->buffer); |
| 2789 | proc->buffer = NULL; |
| 2790 | err_get_vm_area_failed: |
| 2791 | err_already_mapped: |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 2792 | mutex_unlock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2793 | err_bad_arg: |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2794 | pr_err("binder_mmap: %d %lx-%lx %s failed %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2795 | proc->pid, vma->vm_start, vma->vm_end, failure_string, ret); |
| 2796 | return ret; |
| 2797 | } |
| 2798 | |
| 2799 | static int binder_open(struct inode *nodp, struct file *filp) |
| 2800 | { |
| 2801 | struct binder_proc *proc; |
| 2802 | |
| 2803 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n", |
| 2804 | current->group_leader->pid, current->pid); |
| 2805 | |
| 2806 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); |
| 2807 | if (proc == NULL) |
| 2808 | return -ENOMEM; |
| 2809 | get_task_struct(current); |
| 2810 | proc->tsk = current; |
| 2811 | INIT_LIST_HEAD(&proc->todo); |
| 2812 | init_waitqueue_head(&proc->wait); |
| 2813 | proc->default_priority = task_nice(current); |
| 2814 | mutex_lock(&binder_lock); |
| 2815 | binder_stats_created(BINDER_STAT_PROC); |
| 2816 | hlist_add_head(&proc->proc_node, &binder_procs); |
| 2817 | proc->pid = current->group_leader->pid; |
| 2818 | INIT_LIST_HEAD(&proc->delivered_death); |
| 2819 | filp->private_data = proc; |
| 2820 | mutex_unlock(&binder_lock); |
| 2821 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 2822 | if (binder_debugfs_dir_entry_proc) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2823 | char strbuf[11]; |
| 2824 | snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 2825 | proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO, |
| 2826 | binder_debugfs_dir_entry_proc, proc, &binder_proc_fops); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2827 | } |
| 2828 | |
| 2829 | return 0; |
| 2830 | } |
| 2831 | |
| 2832 | static int binder_flush(struct file *filp, fl_owner_t id) |
| 2833 | { |
| 2834 | struct binder_proc *proc = filp->private_data; |
| 2835 | |
| 2836 | binder_defer_work(proc, BINDER_DEFERRED_FLUSH); |
| 2837 | |
| 2838 | return 0; |
| 2839 | } |
| 2840 | |
| 2841 | static void binder_deferred_flush(struct binder_proc *proc) |
| 2842 | { |
| 2843 | struct rb_node *n; |
| 2844 | int wake_count = 0; |
| 2845 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) { |
| 2846 | struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); |
| 2847 | thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; |
| 2848 | if (thread->looper & BINDER_LOOPER_STATE_WAITING) { |
| 2849 | wake_up_interruptible(&thread->wait); |
| 2850 | wake_count++; |
| 2851 | } |
| 2852 | } |
| 2853 | wake_up_interruptible_all(&proc->wait); |
| 2854 | |
| 2855 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 2856 | "binder_flush: %d woke %d threads\n", proc->pid, |
| 2857 | wake_count); |
| 2858 | } |
| 2859 | |
| 2860 | static int binder_release(struct inode *nodp, struct file *filp) |
| 2861 | { |
| 2862 | struct binder_proc *proc = filp->private_data; |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 2863 | debugfs_remove(proc->debugfs_entry); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2864 | binder_defer_work(proc, BINDER_DEFERRED_RELEASE); |
| 2865 | |
| 2866 | return 0; |
| 2867 | } |
| 2868 | |
| 2869 | static void binder_deferred_release(struct binder_proc *proc) |
| 2870 | { |
| 2871 | struct hlist_node *pos; |
| 2872 | struct binder_transaction *t; |
| 2873 | struct rb_node *n; |
| 2874 | int threads, nodes, incoming_refs, outgoing_refs, buffers, active_transactions, page_count; |
| 2875 | |
| 2876 | BUG_ON(proc->vma); |
| 2877 | BUG_ON(proc->files); |
| 2878 | |
| 2879 | hlist_del(&proc->proc_node); |
| 2880 | if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) { |
| 2881 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 2882 | "binder_release: %d context_mgr_node gone\n", |
| 2883 | proc->pid); |
| 2884 | binder_context_mgr_node = NULL; |
| 2885 | } |
| 2886 | |
| 2887 | threads = 0; |
| 2888 | active_transactions = 0; |
| 2889 | while ((n = rb_first(&proc->threads))) { |
| 2890 | struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); |
| 2891 | threads++; |
| 2892 | active_transactions += binder_free_thread(proc, thread); |
| 2893 | } |
| 2894 | nodes = 0; |
| 2895 | incoming_refs = 0; |
| 2896 | while ((n = rb_first(&proc->nodes))) { |
| 2897 | struct binder_node *node = rb_entry(n, struct binder_node, rb_node); |
| 2898 | |
| 2899 | nodes++; |
| 2900 | rb_erase(&node->rb_node, &proc->nodes); |
| 2901 | list_del_init(&node->work.entry); |
| 2902 | if (hlist_empty(&node->refs)) { |
| 2903 | kfree(node); |
| 2904 | binder_stats_deleted(BINDER_STAT_NODE); |
| 2905 | } else { |
| 2906 | struct binder_ref *ref; |
| 2907 | int death = 0; |
| 2908 | |
| 2909 | node->proc = NULL; |
| 2910 | node->local_strong_refs = 0; |
| 2911 | node->local_weak_refs = 0; |
| 2912 | hlist_add_head(&node->dead_node, &binder_dead_nodes); |
| 2913 | |
| 2914 | hlist_for_each_entry(ref, pos, &node->refs, node_entry) { |
| 2915 | incoming_refs++; |
| 2916 | if (ref->death) { |
| 2917 | death++; |
| 2918 | if (list_empty(&ref->death->work.entry)) { |
| 2919 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; |
| 2920 | list_add_tail(&ref->death->work.entry, &ref->proc->todo); |
| 2921 | wake_up_interruptible(&ref->proc->wait); |
| 2922 | } else |
| 2923 | BUG(); |
| 2924 | } |
| 2925 | } |
| 2926 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 2927 | "binder: node %d now dead, " |
| 2928 | "refs %d, death %d\n", node->debug_id, |
| 2929 | incoming_refs, death); |
| 2930 | } |
| 2931 | } |
| 2932 | outgoing_refs = 0; |
| 2933 | while ((n = rb_first(&proc->refs_by_desc))) { |
| 2934 | struct binder_ref *ref = rb_entry(n, struct binder_ref, |
| 2935 | rb_node_desc); |
| 2936 | outgoing_refs++; |
| 2937 | binder_delete_ref(ref); |
| 2938 | } |
| 2939 | binder_release_work(&proc->todo); |
| 2940 | buffers = 0; |
| 2941 | |
| 2942 | while ((n = rb_first(&proc->allocated_buffers))) { |
| 2943 | struct binder_buffer *buffer = rb_entry(n, struct binder_buffer, |
| 2944 | rb_node); |
| 2945 | t = buffer->transaction; |
| 2946 | if (t) { |
| 2947 | t->buffer = NULL; |
| 2948 | buffer->transaction = NULL; |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2949 | pr_err("binder: release proc %d, " |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2950 | "transaction %d, not freed\n", |
| 2951 | proc->pid, t->debug_id); |
| 2952 | /*BUG();*/ |
| 2953 | } |
| 2954 | binder_free_buf(proc, buffer); |
| 2955 | buffers++; |
| 2956 | } |
| 2957 | |
| 2958 | binder_stats_deleted(BINDER_STAT_PROC); |
| 2959 | |
| 2960 | page_count = 0; |
| 2961 | if (proc->pages) { |
| 2962 | int i; |
| 2963 | for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) { |
| 2964 | if (proc->pages[i]) { |
Christopher Lais | 5852609 | 2010-05-01 15:51:48 -0500 | [diff] [blame] | 2965 | void *page_addr = proc->buffer + i * PAGE_SIZE; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2966 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
| 2967 | "binder_release: %d: " |
| 2968 | "page %d at %p not freed\n", |
| 2969 | proc->pid, i, |
Christopher Lais | 5852609 | 2010-05-01 15:51:48 -0500 | [diff] [blame] | 2970 | page_addr); |
| 2971 | unmap_kernel_range((unsigned long)page_addr, |
| 2972 | PAGE_SIZE); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2973 | __free_page(proc->pages[i]); |
| 2974 | page_count++; |
| 2975 | } |
| 2976 | } |
| 2977 | kfree(proc->pages); |
| 2978 | vfree(proc->buffer); |
| 2979 | } |
| 2980 | |
| 2981 | put_task_struct(proc->tsk); |
| 2982 | |
| 2983 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 2984 | "binder_release: %d threads %d, nodes %d (ref %d), " |
| 2985 | "refs %d, active transactions %d, buffers %d, " |
| 2986 | "pages %d\n", |
| 2987 | proc->pid, threads, nodes, incoming_refs, outgoing_refs, |
| 2988 | active_transactions, buffers, page_count); |
| 2989 | |
| 2990 | kfree(proc); |
| 2991 | } |
| 2992 | |
| 2993 | static void binder_deferred_func(struct work_struct *work) |
| 2994 | { |
| 2995 | struct binder_proc *proc; |
| 2996 | struct files_struct *files; |
| 2997 | |
| 2998 | int defer; |
| 2999 | do { |
| 3000 | mutex_lock(&binder_lock); |
| 3001 | mutex_lock(&binder_deferred_lock); |
| 3002 | if (!hlist_empty(&binder_deferred_list)) { |
| 3003 | proc = hlist_entry(binder_deferred_list.first, |
| 3004 | struct binder_proc, deferred_work_node); |
| 3005 | hlist_del_init(&proc->deferred_work_node); |
| 3006 | defer = proc->deferred_work; |
| 3007 | proc->deferred_work = 0; |
| 3008 | } else { |
| 3009 | proc = NULL; |
| 3010 | defer = 0; |
| 3011 | } |
| 3012 | mutex_unlock(&binder_deferred_lock); |
| 3013 | |
| 3014 | files = NULL; |
| 3015 | if (defer & BINDER_DEFERRED_PUT_FILES) { |
| 3016 | files = proc->files; |
| 3017 | if (files) |
| 3018 | proc->files = NULL; |
| 3019 | } |
| 3020 | |
| 3021 | if (defer & BINDER_DEFERRED_FLUSH) |
| 3022 | binder_deferred_flush(proc); |
| 3023 | |
| 3024 | if (defer & BINDER_DEFERRED_RELEASE) |
| 3025 | binder_deferred_release(proc); /* frees proc */ |
| 3026 | |
| 3027 | mutex_unlock(&binder_lock); |
| 3028 | if (files) |
| 3029 | put_files_struct(files); |
| 3030 | } while (proc); |
| 3031 | } |
| 3032 | static DECLARE_WORK(binder_deferred_work, binder_deferred_func); |
| 3033 | |
| 3034 | static void |
| 3035 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer) |
| 3036 | { |
| 3037 | mutex_lock(&binder_deferred_lock); |
| 3038 | proc->deferred_work |= defer; |
| 3039 | if (hlist_unhashed(&proc->deferred_work_node)) { |
| 3040 | hlist_add_head(&proc->deferred_work_node, |
| 3041 | &binder_deferred_list); |
Arve Hjønnevåg | 3c762a4 | 2010-04-22 15:53:23 -0700 | [diff] [blame] | 3042 | queue_work(binder_deferred_workqueue, &binder_deferred_work); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3043 | } |
| 3044 | mutex_unlock(&binder_deferred_lock); |
| 3045 | } |
| 3046 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3047 | static void print_binder_transaction(struct seq_file *m, const char *prefix, |
| 3048 | struct binder_transaction *t) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3049 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3050 | seq_printf(m, |
| 3051 | "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d", |
| 3052 | prefix, t->debug_id, t, |
| 3053 | t->from ? t->from->proc->pid : 0, |
| 3054 | t->from ? t->from->pid : 0, |
| 3055 | t->to_proc ? t->to_proc->pid : 0, |
| 3056 | t->to_thread ? t->to_thread->pid : 0, |
| 3057 | t->code, t->flags, t->priority, t->need_reply); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3058 | if (t->buffer == NULL) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3059 | seq_puts(m, " buffer free\n"); |
| 3060 | return; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3061 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3062 | if (t->buffer->target_node) |
| 3063 | seq_printf(m, " node %d", |
| 3064 | t->buffer->target_node->debug_id); |
| 3065 | seq_printf(m, " size %zd:%zd data %p\n", |
| 3066 | t->buffer->data_size, t->buffer->offsets_size, |
| 3067 | t->buffer->data); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3068 | } |
| 3069 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3070 | static void print_binder_buffer(struct seq_file *m, const char *prefix, |
| 3071 | struct binder_buffer *buffer) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3072 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3073 | seq_printf(m, "%s %d: %p size %zd:%zd %s\n", |
| 3074 | prefix, buffer->debug_id, buffer->data, |
| 3075 | buffer->data_size, buffer->offsets_size, |
| 3076 | buffer->transaction ? "active" : "delivered"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3077 | } |
| 3078 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3079 | static void print_binder_work(struct seq_file *m, const char *prefix, |
| 3080 | const char *transaction_prefix, |
| 3081 | struct binder_work *w) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3082 | { |
| 3083 | struct binder_node *node; |
| 3084 | struct binder_transaction *t; |
| 3085 | |
| 3086 | switch (w->type) { |
| 3087 | case BINDER_WORK_TRANSACTION: |
| 3088 | t = container_of(w, struct binder_transaction, work); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3089 | print_binder_transaction(m, transaction_prefix, t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3090 | break; |
| 3091 | case BINDER_WORK_TRANSACTION_COMPLETE: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3092 | seq_printf(m, "%stransaction complete\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3093 | break; |
| 3094 | case BINDER_WORK_NODE: |
| 3095 | node = container_of(w, struct binder_node, work); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3096 | seq_printf(m, "%snode work %d: u%p c%p\n", |
| 3097 | prefix, node->debug_id, node->ptr, node->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3098 | break; |
| 3099 | case BINDER_WORK_DEAD_BINDER: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3100 | seq_printf(m, "%shas dead binder\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3101 | break; |
| 3102 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3103 | seq_printf(m, "%shas cleared dead binder\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3104 | break; |
| 3105 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3106 | seq_printf(m, "%shas cleared death notification\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3107 | break; |
| 3108 | default: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3109 | seq_printf(m, "%sunknown work: type %d\n", prefix, w->type); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3110 | break; |
| 3111 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3112 | } |
| 3113 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3114 | static void print_binder_thread(struct seq_file *m, |
| 3115 | struct binder_thread *thread, |
| 3116 | int print_always) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3117 | { |
| 3118 | struct binder_transaction *t; |
| 3119 | struct binder_work *w; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3120 | size_t start_pos = m->count; |
| 3121 | size_t header_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3122 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3123 | seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper); |
| 3124 | header_pos = m->count; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3125 | t = thread->transaction_stack; |
| 3126 | while (t) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3127 | if (t->from == thread) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3128 | print_binder_transaction(m, |
| 3129 | " outgoing transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3130 | t = t->from_parent; |
| 3131 | } else if (t->to_thread == thread) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3132 | print_binder_transaction(m, |
| 3133 | " incoming transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3134 | t = t->to_parent; |
| 3135 | } else { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3136 | print_binder_transaction(m, " bad transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3137 | t = NULL; |
| 3138 | } |
| 3139 | } |
| 3140 | list_for_each_entry(w, &thread->todo, entry) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3141 | print_binder_work(m, " ", " pending transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3142 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3143 | if (!print_always && m->count == header_pos) |
| 3144 | m->count = start_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3145 | } |
| 3146 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3147 | static void print_binder_node(struct seq_file *m, struct binder_node *node) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3148 | { |
| 3149 | struct binder_ref *ref; |
| 3150 | struct hlist_node *pos; |
| 3151 | struct binder_work *w; |
| 3152 | int count; |
| 3153 | |
| 3154 | count = 0; |
| 3155 | hlist_for_each_entry(ref, pos, &node->refs, node_entry) |
| 3156 | count++; |
| 3157 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3158 | seq_printf(m, " node %d: u%p c%p hs %d hw %d ls %d lw %d is %d iw %d", |
| 3159 | node->debug_id, node->ptr, node->cookie, |
| 3160 | node->has_strong_ref, node->has_weak_ref, |
| 3161 | node->local_strong_refs, node->local_weak_refs, |
| 3162 | node->internal_strong_refs, count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3163 | if (count) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3164 | seq_puts(m, " proc"); |
| 3165 | hlist_for_each_entry(ref, pos, &node->refs, node_entry) |
| 3166 | seq_printf(m, " %d", ref->proc->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3167 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3168 | seq_puts(m, "\n"); |
| 3169 | list_for_each_entry(w, &node->async_todo, entry) |
| 3170 | print_binder_work(m, " ", |
| 3171 | " pending async transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3172 | } |
| 3173 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3174 | static void print_binder_ref(struct seq_file *m, struct binder_ref *ref) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3175 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3176 | seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n", |
| 3177 | ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ", |
| 3178 | ref->node->debug_id, ref->strong, ref->weak, ref->death); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3179 | } |
| 3180 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3181 | static void print_binder_proc(struct seq_file *m, |
| 3182 | struct binder_proc *proc, int print_all) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3183 | { |
| 3184 | struct binder_work *w; |
| 3185 | struct rb_node *n; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3186 | size_t start_pos = m->count; |
| 3187 | size_t header_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3188 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3189 | seq_printf(m, "proc %d\n", proc->pid); |
| 3190 | header_pos = m->count; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3191 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3192 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) |
| 3193 | print_binder_thread(m, rb_entry(n, struct binder_thread, |
| 3194 | rb_node), print_all); |
| 3195 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3196 | struct binder_node *node = rb_entry(n, struct binder_node, |
| 3197 | rb_node); |
| 3198 | if (print_all || node->has_async_transaction) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3199 | print_binder_node(m, node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3200 | } |
| 3201 | if (print_all) { |
| 3202 | for (n = rb_first(&proc->refs_by_desc); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3203 | n != NULL; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3204 | n = rb_next(n)) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3205 | print_binder_ref(m, rb_entry(n, struct binder_ref, |
| 3206 | rb_node_desc)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3207 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3208 | for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) |
| 3209 | print_binder_buffer(m, " buffer", |
| 3210 | rb_entry(n, struct binder_buffer, rb_node)); |
| 3211 | list_for_each_entry(w, &proc->todo, entry) |
| 3212 | print_binder_work(m, " ", " pending transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3213 | list_for_each_entry(w, &proc->delivered_death, entry) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3214 | seq_puts(m, " has delivered dead binder\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3215 | break; |
| 3216 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3217 | if (!print_all && m->count == header_pos) |
| 3218 | m->count = start_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3219 | } |
| 3220 | |
| 3221 | static const char *binder_return_strings[] = { |
| 3222 | "BR_ERROR", |
| 3223 | "BR_OK", |
| 3224 | "BR_TRANSACTION", |
| 3225 | "BR_REPLY", |
| 3226 | "BR_ACQUIRE_RESULT", |
| 3227 | "BR_DEAD_REPLY", |
| 3228 | "BR_TRANSACTION_COMPLETE", |
| 3229 | "BR_INCREFS", |
| 3230 | "BR_ACQUIRE", |
| 3231 | "BR_RELEASE", |
| 3232 | "BR_DECREFS", |
| 3233 | "BR_ATTEMPT_ACQUIRE", |
| 3234 | "BR_NOOP", |
| 3235 | "BR_SPAWN_LOOPER", |
| 3236 | "BR_FINISHED", |
| 3237 | "BR_DEAD_BINDER", |
| 3238 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", |
| 3239 | "BR_FAILED_REPLY" |
| 3240 | }; |
| 3241 | |
| 3242 | static const char *binder_command_strings[] = { |
| 3243 | "BC_TRANSACTION", |
| 3244 | "BC_REPLY", |
| 3245 | "BC_ACQUIRE_RESULT", |
| 3246 | "BC_FREE_BUFFER", |
| 3247 | "BC_INCREFS", |
| 3248 | "BC_ACQUIRE", |
| 3249 | "BC_RELEASE", |
| 3250 | "BC_DECREFS", |
| 3251 | "BC_INCREFS_DONE", |
| 3252 | "BC_ACQUIRE_DONE", |
| 3253 | "BC_ATTEMPT_ACQUIRE", |
| 3254 | "BC_REGISTER_LOOPER", |
| 3255 | "BC_ENTER_LOOPER", |
| 3256 | "BC_EXIT_LOOPER", |
| 3257 | "BC_REQUEST_DEATH_NOTIFICATION", |
| 3258 | "BC_CLEAR_DEATH_NOTIFICATION", |
| 3259 | "BC_DEAD_BINDER_DONE" |
| 3260 | }; |
| 3261 | |
| 3262 | static const char *binder_objstat_strings[] = { |
| 3263 | "proc", |
| 3264 | "thread", |
| 3265 | "node", |
| 3266 | "ref", |
| 3267 | "death", |
| 3268 | "transaction", |
| 3269 | "transaction_complete" |
| 3270 | }; |
| 3271 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3272 | static void print_binder_stats(struct seq_file *m, const char *prefix, |
| 3273 | struct binder_stats *stats) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3274 | { |
| 3275 | int i; |
| 3276 | |
| 3277 | BUILD_BUG_ON(ARRAY_SIZE(stats->bc) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3278 | ARRAY_SIZE(binder_command_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3279 | for (i = 0; i < ARRAY_SIZE(stats->bc); i++) { |
| 3280 | if (stats->bc[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3281 | seq_printf(m, "%s%s: %d\n", prefix, |
| 3282 | binder_command_strings[i], stats->bc[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3283 | } |
| 3284 | |
| 3285 | BUILD_BUG_ON(ARRAY_SIZE(stats->br) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3286 | ARRAY_SIZE(binder_return_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3287 | for (i = 0; i < ARRAY_SIZE(stats->br); i++) { |
| 3288 | if (stats->br[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3289 | seq_printf(m, "%s%s: %d\n", prefix, |
| 3290 | binder_return_strings[i], stats->br[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3291 | } |
| 3292 | |
| 3293 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3294 | ARRAY_SIZE(binder_objstat_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3295 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3296 | ARRAY_SIZE(stats->obj_deleted)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3297 | for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) { |
| 3298 | if (stats->obj_created[i] || stats->obj_deleted[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3299 | seq_printf(m, "%s%s: active %d total %d\n", prefix, |
| 3300 | binder_objstat_strings[i], |
| 3301 | stats->obj_created[i] - stats->obj_deleted[i], |
| 3302 | stats->obj_created[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3303 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3304 | } |
| 3305 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3306 | static void print_binder_proc_stats(struct seq_file *m, |
| 3307 | struct binder_proc *proc) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3308 | { |
| 3309 | struct binder_work *w; |
| 3310 | struct rb_node *n; |
| 3311 | int count, strong, weak; |
| 3312 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3313 | seq_printf(m, "proc %d\n", proc->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3314 | count = 0; |
| 3315 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) |
| 3316 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3317 | seq_printf(m, " threads: %d\n", count); |
| 3318 | seq_printf(m, " requested threads: %d+%d/%d\n" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3319 | " ready threads %d\n" |
| 3320 | " free async space %zd\n", proc->requested_threads, |
| 3321 | proc->requested_threads_started, proc->max_threads, |
| 3322 | proc->ready_threads, proc->free_async_space); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3323 | count = 0; |
| 3324 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) |
| 3325 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3326 | seq_printf(m, " nodes: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3327 | count = 0; |
| 3328 | strong = 0; |
| 3329 | weak = 0; |
| 3330 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
| 3331 | struct binder_ref *ref = rb_entry(n, struct binder_ref, |
| 3332 | rb_node_desc); |
| 3333 | count++; |
| 3334 | strong += ref->strong; |
| 3335 | weak += ref->weak; |
| 3336 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3337 | seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3338 | |
| 3339 | count = 0; |
| 3340 | for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) |
| 3341 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3342 | seq_printf(m, " buffers: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3343 | |
| 3344 | count = 0; |
| 3345 | list_for_each_entry(w, &proc->todo, entry) { |
| 3346 | switch (w->type) { |
| 3347 | case BINDER_WORK_TRANSACTION: |
| 3348 | count++; |
| 3349 | break; |
| 3350 | default: |
| 3351 | break; |
| 3352 | } |
| 3353 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3354 | seq_printf(m, " pending transactions: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3355 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3356 | print_binder_stats(m, " ", &proc->stats); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3357 | } |
| 3358 | |
| 3359 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3360 | static int binder_state_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3361 | { |
| 3362 | struct binder_proc *proc; |
| 3363 | struct hlist_node *pos; |
| 3364 | struct binder_node *node; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3365 | int do_lock = !binder_debug_no_lock; |
| 3366 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3367 | if (do_lock) |
| 3368 | mutex_lock(&binder_lock); |
| 3369 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3370 | seq_puts(m, "binder state:\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3371 | |
| 3372 | if (!hlist_empty(&binder_dead_nodes)) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3373 | seq_puts(m, "dead nodes:\n"); |
| 3374 | hlist_for_each_entry(node, pos, &binder_dead_nodes, dead_node) |
| 3375 | print_binder_node(m, node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3376 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3377 | hlist_for_each_entry(proc, pos, &binder_procs, proc_node) |
| 3378 | print_binder_proc(m, proc, 1); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3379 | if (do_lock) |
| 3380 | mutex_unlock(&binder_lock); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3381 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3382 | } |
| 3383 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3384 | static int binder_stats_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3385 | { |
| 3386 | struct binder_proc *proc; |
| 3387 | struct hlist_node *pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3388 | int do_lock = !binder_debug_no_lock; |
| 3389 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3390 | if (do_lock) |
| 3391 | mutex_lock(&binder_lock); |
| 3392 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3393 | seq_puts(m, "binder stats:\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3394 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3395 | print_binder_stats(m, "", &binder_stats); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3396 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3397 | hlist_for_each_entry(proc, pos, &binder_procs, proc_node) |
| 3398 | print_binder_proc_stats(m, proc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3399 | if (do_lock) |
| 3400 | mutex_unlock(&binder_lock); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3401 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3402 | } |
| 3403 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3404 | static int binder_transactions_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3405 | { |
| 3406 | struct binder_proc *proc; |
| 3407 | struct hlist_node *pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3408 | int do_lock = !binder_debug_no_lock; |
| 3409 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3410 | if (do_lock) |
| 3411 | mutex_lock(&binder_lock); |
| 3412 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3413 | seq_puts(m, "binder transactions:\n"); |
| 3414 | hlist_for_each_entry(proc, pos, &binder_procs, proc_node) |
| 3415 | print_binder_proc(m, proc, 0); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3416 | if (do_lock) |
| 3417 | mutex_unlock(&binder_lock); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3418 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3419 | } |
| 3420 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3421 | static int binder_proc_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3422 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3423 | struct binder_proc *proc = m->private; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3424 | int do_lock = !binder_debug_no_lock; |
| 3425 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3426 | if (do_lock) |
| 3427 | mutex_lock(&binder_lock); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3428 | seq_puts(m, "binder proc state:\n"); |
| 3429 | print_binder_proc(m, proc, 1); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3430 | if (do_lock) |
| 3431 | mutex_unlock(&binder_lock); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3432 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3433 | } |
| 3434 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3435 | static void print_binder_transaction_log_entry(struct seq_file *m, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3436 | struct binder_transaction_log_entry *e) |
| 3437 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3438 | seq_printf(m, |
| 3439 | "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n", |
| 3440 | e->debug_id, (e->call_type == 2) ? "reply" : |
| 3441 | ((e->call_type == 1) ? "async" : "call "), e->from_proc, |
| 3442 | e->from_thread, e->to_proc, e->to_thread, e->to_node, |
| 3443 | e->target_handle, e->data_size, e->offsets_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3444 | } |
| 3445 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3446 | static int binder_transaction_log_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3447 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3448 | struct binder_transaction_log *log = m->private; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3449 | int i; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3450 | |
| 3451 | if (log->full) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3452 | for (i = log->next; i < ARRAY_SIZE(log->entry); i++) |
| 3453 | print_binder_transaction_log_entry(m, &log->entry[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3454 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3455 | for (i = 0; i < log->next; i++) |
| 3456 | print_binder_transaction_log_entry(m, &log->entry[i]); |
| 3457 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3458 | } |
| 3459 | |
| 3460 | static const struct file_operations binder_fops = { |
| 3461 | .owner = THIS_MODULE, |
| 3462 | .poll = binder_poll, |
| 3463 | .unlocked_ioctl = binder_ioctl, |
| 3464 | .mmap = binder_mmap, |
| 3465 | .open = binder_open, |
| 3466 | .flush = binder_flush, |
| 3467 | .release = binder_release, |
| 3468 | }; |
| 3469 | |
| 3470 | static struct miscdevice binder_miscdev = { |
| 3471 | .minor = MISC_DYNAMIC_MINOR, |
| 3472 | .name = "binder", |
| 3473 | .fops = &binder_fops |
| 3474 | }; |
| 3475 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3476 | BINDER_DEBUG_ENTRY(state); |
| 3477 | BINDER_DEBUG_ENTRY(stats); |
| 3478 | BINDER_DEBUG_ENTRY(transactions); |
| 3479 | BINDER_DEBUG_ENTRY(transaction_log); |
| 3480 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3481 | static int __init binder_init(void) |
| 3482 | { |
| 3483 | int ret; |
| 3484 | |
Arve Hjønnevåg | 3c762a4 | 2010-04-22 15:53:23 -0700 | [diff] [blame] | 3485 | binder_deferred_workqueue = create_singlethread_workqueue("binder"); |
| 3486 | if (!binder_deferred_workqueue) |
| 3487 | return -ENOMEM; |
| 3488 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3489 | binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL); |
| 3490 | if (binder_debugfs_dir_entry_root) |
| 3491 | binder_debugfs_dir_entry_proc = debugfs_create_dir("proc", |
| 3492 | binder_debugfs_dir_entry_root); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3493 | ret = misc_register(&binder_miscdev); |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3494 | if (binder_debugfs_dir_entry_root) { |
| 3495 | debugfs_create_file("state", |
| 3496 | S_IRUGO, |
| 3497 | binder_debugfs_dir_entry_root, |
| 3498 | NULL, |
| 3499 | &binder_state_fops); |
| 3500 | debugfs_create_file("stats", |
| 3501 | S_IRUGO, |
| 3502 | binder_debugfs_dir_entry_root, |
| 3503 | NULL, |
| 3504 | &binder_stats_fops); |
| 3505 | debugfs_create_file("transactions", |
| 3506 | S_IRUGO, |
| 3507 | binder_debugfs_dir_entry_root, |
| 3508 | NULL, |
| 3509 | &binder_transactions_fops); |
| 3510 | debugfs_create_file("transaction_log", |
| 3511 | S_IRUGO, |
| 3512 | binder_debugfs_dir_entry_root, |
| 3513 | &binder_transaction_log, |
| 3514 | &binder_transaction_log_fops); |
| 3515 | debugfs_create_file("failed_transaction_log", |
| 3516 | S_IRUGO, |
| 3517 | binder_debugfs_dir_entry_root, |
| 3518 | &binder_transaction_log_failed, |
| 3519 | &binder_transaction_log_fops); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3520 | } |
| 3521 | return ret; |
| 3522 | } |
| 3523 | |
| 3524 | device_initcall(binder_init); |
| 3525 | |
| 3526 | MODULE_LICENSE("GPL v2"); |