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 | |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 18 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 19 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 20 | #include <asm/cacheflush.h> |
| 21 | #include <linux/fdtable.h> |
| 22 | #include <linux/file.h> |
Colin Cross | e2610b2 | 2013-05-06 23:50:15 +0000 | [diff] [blame^] | 23 | #include <linux/freezer.h> |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 24 | #include <linux/fs.h> |
| 25 | #include <linux/list.h> |
| 26 | #include <linux/miscdevice.h> |
| 27 | #include <linux/mm.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/mutex.h> |
| 30 | #include <linux/nsproxy.h> |
| 31 | #include <linux/poll.h> |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 32 | #include <linux/debugfs.h> |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 33 | #include <linux/rbtree.h> |
| 34 | #include <linux/sched.h> |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 35 | #include <linux/seq_file.h> |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 36 | #include <linux/uaccess.h> |
| 37 | #include <linux/vmalloc.h> |
Colin Cross | c11a166 | 2010-04-15 15:21:51 -0700 | [diff] [blame] | 38 | #include <linux/slab.h> |
Eric W. Biederman | 17cf22c | 2010-03-02 14:51:53 -0800 | [diff] [blame] | 39 | #include <linux/pid_namespace.h> |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 40 | |
| 41 | #include "binder.h" |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 42 | #include "binder_trace.h" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 43 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 44 | static DEFINE_MUTEX(binder_main_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 45 | static DEFINE_MUTEX(binder_deferred_lock); |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 46 | static DEFINE_MUTEX(binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 47 | |
| 48 | static HLIST_HEAD(binder_procs); |
| 49 | static HLIST_HEAD(binder_deferred_list); |
| 50 | static HLIST_HEAD(binder_dead_nodes); |
| 51 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 52 | static struct dentry *binder_debugfs_dir_entry_root; |
| 53 | static struct dentry *binder_debugfs_dir_entry_proc; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 54 | static struct binder_node *binder_context_mgr_node; |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 55 | static kuid_t binder_context_mgr_uid = INVALID_UID; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 56 | static int binder_last_id; |
Arve Hjønnevåg | 3c762a4 | 2010-04-22 15:53:23 -0700 | [diff] [blame] | 57 | static struct workqueue_struct *binder_deferred_workqueue; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 58 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 59 | #define BINDER_DEBUG_ENTRY(name) \ |
| 60 | static int binder_##name##_open(struct inode *inode, struct file *file) \ |
| 61 | { \ |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 62 | return single_open(file, binder_##name##_show, inode->i_private); \ |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 63 | } \ |
| 64 | \ |
| 65 | static const struct file_operations binder_##name##_fops = { \ |
| 66 | .owner = THIS_MODULE, \ |
| 67 | .open = binder_##name##_open, \ |
| 68 | .read = seq_read, \ |
| 69 | .llseek = seq_lseek, \ |
| 70 | .release = single_release, \ |
| 71 | } |
| 72 | |
| 73 | static int binder_proc_show(struct seq_file *m, void *unused); |
| 74 | BINDER_DEBUG_ENTRY(proc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 75 | |
| 76 | /* This is only defined in include/asm-arm/sizes.h */ |
| 77 | #ifndef SZ_1K |
| 78 | #define SZ_1K 0x400 |
| 79 | #endif |
| 80 | |
| 81 | #ifndef SZ_4M |
| 82 | #define SZ_4M 0x400000 |
| 83 | #endif |
| 84 | |
| 85 | #define FORBIDDEN_MMAP_FLAGS (VM_WRITE) |
| 86 | |
| 87 | #define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64) |
| 88 | |
| 89 | enum { |
| 90 | BINDER_DEBUG_USER_ERROR = 1U << 0, |
| 91 | BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1, |
| 92 | BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2, |
| 93 | BINDER_DEBUG_OPEN_CLOSE = 1U << 3, |
| 94 | BINDER_DEBUG_DEAD_BINDER = 1U << 4, |
| 95 | BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5, |
| 96 | BINDER_DEBUG_READ_WRITE = 1U << 6, |
| 97 | BINDER_DEBUG_USER_REFS = 1U << 7, |
| 98 | BINDER_DEBUG_THREADS = 1U << 8, |
| 99 | BINDER_DEBUG_TRANSACTION = 1U << 9, |
| 100 | BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10, |
| 101 | BINDER_DEBUG_FREE_BUFFER = 1U << 11, |
| 102 | BINDER_DEBUG_INTERNAL_REFS = 1U << 12, |
| 103 | BINDER_DEBUG_BUFFER_ALLOC = 1U << 13, |
| 104 | BINDER_DEBUG_PRIORITY_CAP = 1U << 14, |
| 105 | BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15, |
| 106 | }; |
| 107 | static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR | |
| 108 | BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION; |
| 109 | module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO); |
| 110 | |
Zhengwang Ruan | 2c52325 | 2012-03-07 10:36:57 +0800 | [diff] [blame] | 111 | static bool binder_debug_no_lock; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 112 | module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO); |
| 113 | |
| 114 | static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait); |
| 115 | static int binder_stop_on_user_error; |
| 116 | |
| 117 | static int binder_set_stop_on_user_error(const char *val, |
| 118 | struct kernel_param *kp) |
| 119 | { |
| 120 | int ret; |
| 121 | ret = param_set_int(val, kp); |
| 122 | if (binder_stop_on_user_error < 2) |
| 123 | wake_up(&binder_user_error_wait); |
| 124 | return ret; |
| 125 | } |
| 126 | module_param_call(stop_on_user_error, binder_set_stop_on_user_error, |
| 127 | param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO); |
| 128 | |
| 129 | #define binder_debug(mask, x...) \ |
| 130 | do { \ |
| 131 | if (binder_debug_mask & mask) \ |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 132 | pr_info(x); \ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 133 | } while (0) |
| 134 | |
| 135 | #define binder_user_error(x...) \ |
| 136 | do { \ |
| 137 | if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \ |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 138 | pr_info(x); \ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 139 | if (binder_stop_on_user_error) \ |
| 140 | binder_stop_on_user_error = 2; \ |
| 141 | } while (0) |
| 142 | |
| 143 | enum binder_stat_types { |
| 144 | BINDER_STAT_PROC, |
| 145 | BINDER_STAT_THREAD, |
| 146 | BINDER_STAT_NODE, |
| 147 | BINDER_STAT_REF, |
| 148 | BINDER_STAT_DEATH, |
| 149 | BINDER_STAT_TRANSACTION, |
| 150 | BINDER_STAT_TRANSACTION_COMPLETE, |
| 151 | BINDER_STAT_COUNT |
| 152 | }; |
| 153 | |
| 154 | struct binder_stats { |
| 155 | int br[_IOC_NR(BR_FAILED_REPLY) + 1]; |
| 156 | int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1]; |
| 157 | int obj_created[BINDER_STAT_COUNT]; |
| 158 | int obj_deleted[BINDER_STAT_COUNT]; |
| 159 | }; |
| 160 | |
| 161 | static struct binder_stats binder_stats; |
| 162 | |
| 163 | static inline void binder_stats_deleted(enum binder_stat_types type) |
| 164 | { |
| 165 | binder_stats.obj_deleted[type]++; |
| 166 | } |
| 167 | |
| 168 | static inline void binder_stats_created(enum binder_stat_types type) |
| 169 | { |
| 170 | binder_stats.obj_created[type]++; |
| 171 | } |
| 172 | |
| 173 | struct binder_transaction_log_entry { |
| 174 | int debug_id; |
| 175 | int call_type; |
| 176 | int from_proc; |
| 177 | int from_thread; |
| 178 | int target_handle; |
| 179 | int to_proc; |
| 180 | int to_thread; |
| 181 | int to_node; |
| 182 | int data_size; |
| 183 | int offsets_size; |
| 184 | }; |
| 185 | struct binder_transaction_log { |
| 186 | int next; |
| 187 | int full; |
| 188 | struct binder_transaction_log_entry entry[32]; |
| 189 | }; |
| 190 | static struct binder_transaction_log binder_transaction_log; |
| 191 | static struct binder_transaction_log binder_transaction_log_failed; |
| 192 | |
| 193 | static struct binder_transaction_log_entry *binder_transaction_log_add( |
| 194 | struct binder_transaction_log *log) |
| 195 | { |
| 196 | struct binder_transaction_log_entry *e; |
| 197 | e = &log->entry[log->next]; |
| 198 | memset(e, 0, sizeof(*e)); |
| 199 | log->next++; |
| 200 | if (log->next == ARRAY_SIZE(log->entry)) { |
| 201 | log->next = 0; |
| 202 | log->full = 1; |
| 203 | } |
| 204 | return e; |
| 205 | } |
| 206 | |
| 207 | struct binder_work { |
| 208 | struct list_head entry; |
| 209 | enum { |
| 210 | BINDER_WORK_TRANSACTION = 1, |
| 211 | BINDER_WORK_TRANSACTION_COMPLETE, |
| 212 | BINDER_WORK_NODE, |
| 213 | BINDER_WORK_DEAD_BINDER, |
| 214 | BINDER_WORK_DEAD_BINDER_AND_CLEAR, |
| 215 | BINDER_WORK_CLEAR_DEATH_NOTIFICATION, |
| 216 | } type; |
| 217 | }; |
| 218 | |
| 219 | struct binder_node { |
| 220 | int debug_id; |
| 221 | struct binder_work work; |
| 222 | union { |
| 223 | struct rb_node rb_node; |
| 224 | struct hlist_node dead_node; |
| 225 | }; |
| 226 | struct binder_proc *proc; |
| 227 | struct hlist_head refs; |
| 228 | int internal_strong_refs; |
| 229 | int local_weak_refs; |
| 230 | int local_strong_refs; |
| 231 | void __user *ptr; |
| 232 | void __user *cookie; |
| 233 | unsigned has_strong_ref:1; |
| 234 | unsigned pending_strong_ref:1; |
| 235 | unsigned has_weak_ref:1; |
| 236 | unsigned pending_weak_ref:1; |
| 237 | unsigned has_async_transaction:1; |
| 238 | unsigned accept_fds:1; |
| 239 | unsigned min_priority:8; |
| 240 | struct list_head async_todo; |
| 241 | }; |
| 242 | |
| 243 | struct binder_ref_death { |
| 244 | struct binder_work work; |
| 245 | void __user *cookie; |
| 246 | }; |
| 247 | |
| 248 | struct binder_ref { |
| 249 | /* Lookups needed: */ |
| 250 | /* node + proc => ref (transaction) */ |
| 251 | /* desc + proc => ref (transaction, inc/dec ref) */ |
| 252 | /* node => refs + procs (proc exit) */ |
| 253 | int debug_id; |
| 254 | struct rb_node rb_node_desc; |
| 255 | struct rb_node rb_node_node; |
| 256 | struct hlist_node node_entry; |
| 257 | struct binder_proc *proc; |
| 258 | struct binder_node *node; |
| 259 | uint32_t desc; |
| 260 | int strong; |
| 261 | int weak; |
| 262 | struct binder_ref_death *death; |
| 263 | }; |
| 264 | |
| 265 | struct binder_buffer { |
Justin P. Mattock | 217218f | 2012-01-12 06:51:31 -0800 | [diff] [blame] | 266 | struct list_head entry; /* free and allocated entries by address */ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 267 | struct rb_node rb_node; /* free entry by size or allocated entry */ |
| 268 | /* by address */ |
| 269 | unsigned free:1; |
| 270 | unsigned allow_user_free:1; |
| 271 | unsigned async_transaction:1; |
| 272 | unsigned debug_id:29; |
| 273 | |
| 274 | struct binder_transaction *transaction; |
| 275 | |
| 276 | struct binder_node *target_node; |
| 277 | size_t data_size; |
| 278 | size_t offsets_size; |
| 279 | uint8_t data[0]; |
| 280 | }; |
| 281 | |
| 282 | enum binder_deferred_state { |
| 283 | BINDER_DEFERRED_PUT_FILES = 0x01, |
| 284 | BINDER_DEFERRED_FLUSH = 0x02, |
| 285 | BINDER_DEFERRED_RELEASE = 0x04, |
| 286 | }; |
| 287 | |
| 288 | struct binder_proc { |
| 289 | struct hlist_node proc_node; |
| 290 | struct rb_root threads; |
| 291 | struct rb_root nodes; |
| 292 | struct rb_root refs_by_desc; |
| 293 | struct rb_root refs_by_node; |
| 294 | int pid; |
| 295 | struct vm_area_struct *vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 296 | struct mm_struct *vma_vm_mm; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 297 | struct task_struct *tsk; |
| 298 | struct files_struct *files; |
| 299 | struct hlist_node deferred_work_node; |
| 300 | int deferred_work; |
| 301 | void *buffer; |
| 302 | ptrdiff_t user_buffer_offset; |
| 303 | |
| 304 | struct list_head buffers; |
| 305 | struct rb_root free_buffers; |
| 306 | struct rb_root allocated_buffers; |
| 307 | size_t free_async_space; |
| 308 | |
| 309 | struct page **pages; |
| 310 | size_t buffer_size; |
| 311 | uint32_t buffer_free; |
| 312 | struct list_head todo; |
| 313 | wait_queue_head_t wait; |
| 314 | struct binder_stats stats; |
| 315 | struct list_head delivered_death; |
| 316 | int max_threads; |
| 317 | int requested_threads; |
| 318 | int requested_threads_started; |
| 319 | int ready_threads; |
| 320 | long default_priority; |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 321 | struct dentry *debugfs_entry; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 322 | }; |
| 323 | |
| 324 | enum { |
| 325 | BINDER_LOOPER_STATE_REGISTERED = 0x01, |
| 326 | BINDER_LOOPER_STATE_ENTERED = 0x02, |
| 327 | BINDER_LOOPER_STATE_EXITED = 0x04, |
| 328 | BINDER_LOOPER_STATE_INVALID = 0x08, |
| 329 | BINDER_LOOPER_STATE_WAITING = 0x10, |
| 330 | BINDER_LOOPER_STATE_NEED_RETURN = 0x20 |
| 331 | }; |
| 332 | |
| 333 | struct binder_thread { |
| 334 | struct binder_proc *proc; |
| 335 | struct rb_node rb_node; |
| 336 | int pid; |
| 337 | int looper; |
| 338 | struct binder_transaction *transaction_stack; |
| 339 | struct list_head todo; |
| 340 | uint32_t return_error; /* Write failed, return error code in read buf */ |
| 341 | uint32_t return_error2; /* Write failed, return error code in read */ |
| 342 | /* buffer. Used when sending a reply to a dead process that */ |
| 343 | /* we are also waiting on */ |
| 344 | wait_queue_head_t wait; |
| 345 | struct binder_stats stats; |
| 346 | }; |
| 347 | |
| 348 | struct binder_transaction { |
| 349 | int debug_id; |
| 350 | struct binder_work work; |
| 351 | struct binder_thread *from; |
| 352 | struct binder_transaction *from_parent; |
| 353 | struct binder_proc *to_proc; |
| 354 | struct binder_thread *to_thread; |
| 355 | struct binder_transaction *to_parent; |
| 356 | unsigned need_reply:1; |
| 357 | /* unsigned is_dead:1; */ /* not used at the moment */ |
| 358 | |
| 359 | struct binder_buffer *buffer; |
| 360 | unsigned int code; |
| 361 | unsigned int flags; |
| 362 | long priority; |
| 363 | long saved_priority; |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 364 | kuid_t sender_euid; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 365 | }; |
| 366 | |
| 367 | static void |
| 368 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer); |
| 369 | |
Sachin Kamat | efde99c | 2012-08-17 16:39:36 +0530 | [diff] [blame] | 370 | 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] | 371 | { |
| 372 | struct files_struct *files = proc->files; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 373 | unsigned long rlim_cur; |
| 374 | unsigned long irqs; |
| 375 | |
| 376 | if (files == NULL) |
| 377 | return -ESRCH; |
| 378 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 379 | if (!lock_task_sighand(proc->tsk, &irqs)) |
| 380 | return -EMFILE; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 381 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 382 | rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE); |
| 383 | unlock_task_sighand(proc->tsk, &irqs); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 384 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 385 | return __alloc_fd(files, 0, rlim_cur, flags); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | /* |
| 389 | * copied from fd_install |
| 390 | */ |
| 391 | static void task_fd_install( |
| 392 | struct binder_proc *proc, unsigned int fd, struct file *file) |
| 393 | { |
Al Viro | f869e8a | 2012-08-15 21:06:33 -0400 | [diff] [blame] | 394 | if (proc->files) |
| 395 | __fd_install(proc->files, fd, file); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | /* |
| 399 | * copied from sys_close |
| 400 | */ |
| 401 | static long task_close_fd(struct binder_proc *proc, unsigned int fd) |
| 402 | { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 403 | int retval; |
| 404 | |
Al Viro | 483ce1d | 2012-08-19 12:04:24 -0400 | [diff] [blame] | 405 | if (proc->files == NULL) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 406 | return -ESRCH; |
| 407 | |
Al Viro | 483ce1d | 2012-08-19 12:04:24 -0400 | [diff] [blame] | 408 | retval = __close_fd(proc->files, fd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 409 | /* can't restart close syscall because file table entry was cleared */ |
| 410 | if (unlikely(retval == -ERESTARTSYS || |
| 411 | retval == -ERESTARTNOINTR || |
| 412 | retval == -ERESTARTNOHAND || |
| 413 | retval == -ERESTART_RESTARTBLOCK)) |
| 414 | retval = -EINTR; |
| 415 | |
| 416 | return retval; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 417 | } |
| 418 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 419 | static inline void binder_lock(const char *tag) |
| 420 | { |
| 421 | trace_binder_lock(tag); |
| 422 | mutex_lock(&binder_main_lock); |
| 423 | trace_binder_locked(tag); |
| 424 | } |
| 425 | |
| 426 | static inline void binder_unlock(const char *tag) |
| 427 | { |
| 428 | trace_binder_unlock(tag); |
| 429 | mutex_unlock(&binder_main_lock); |
| 430 | } |
| 431 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 432 | static void binder_set_nice(long nice) |
| 433 | { |
| 434 | long min_nice; |
| 435 | if (can_nice(current, nice)) { |
| 436 | set_user_nice(current, nice); |
| 437 | return; |
| 438 | } |
| 439 | min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur; |
| 440 | binder_debug(BINDER_DEBUG_PRIORITY_CAP, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 441 | "%d: nice value %ld not allowed use %ld instead\n", |
| 442 | current->pid, nice, min_nice); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 443 | set_user_nice(current, min_nice); |
| 444 | if (min_nice < 20) |
| 445 | return; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 446 | binder_user_error("%d RLIMIT_NICE not set\n", current->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 447 | } |
| 448 | |
| 449 | static size_t binder_buffer_size(struct binder_proc *proc, |
| 450 | struct binder_buffer *buffer) |
| 451 | { |
| 452 | if (list_is_last(&buffer->entry, &proc->buffers)) |
| 453 | return proc->buffer + proc->buffer_size - (void *)buffer->data; |
| 454 | else |
| 455 | return (size_t)list_entry(buffer->entry.next, |
| 456 | struct binder_buffer, entry) - (size_t)buffer->data; |
| 457 | } |
| 458 | |
| 459 | static void binder_insert_free_buffer(struct binder_proc *proc, |
| 460 | struct binder_buffer *new_buffer) |
| 461 | { |
| 462 | struct rb_node **p = &proc->free_buffers.rb_node; |
| 463 | struct rb_node *parent = NULL; |
| 464 | struct binder_buffer *buffer; |
| 465 | size_t buffer_size; |
| 466 | size_t new_buffer_size; |
| 467 | |
| 468 | BUG_ON(!new_buffer->free); |
| 469 | |
| 470 | new_buffer_size = binder_buffer_size(proc, new_buffer); |
| 471 | |
| 472 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 473 | "%d: add free buffer, size %zd, at %p\n", |
| 474 | proc->pid, new_buffer_size, new_buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 475 | |
| 476 | while (*p) { |
| 477 | parent = *p; |
| 478 | buffer = rb_entry(parent, struct binder_buffer, rb_node); |
| 479 | BUG_ON(!buffer->free); |
| 480 | |
| 481 | buffer_size = binder_buffer_size(proc, buffer); |
| 482 | |
| 483 | if (new_buffer_size < buffer_size) |
| 484 | p = &parent->rb_left; |
| 485 | else |
| 486 | p = &parent->rb_right; |
| 487 | } |
| 488 | rb_link_node(&new_buffer->rb_node, parent, p); |
| 489 | rb_insert_color(&new_buffer->rb_node, &proc->free_buffers); |
| 490 | } |
| 491 | |
| 492 | static void binder_insert_allocated_buffer(struct binder_proc *proc, |
| 493 | struct binder_buffer *new_buffer) |
| 494 | { |
| 495 | struct rb_node **p = &proc->allocated_buffers.rb_node; |
| 496 | struct rb_node *parent = NULL; |
| 497 | struct binder_buffer *buffer; |
| 498 | |
| 499 | BUG_ON(new_buffer->free); |
| 500 | |
| 501 | while (*p) { |
| 502 | parent = *p; |
| 503 | buffer = rb_entry(parent, struct binder_buffer, rb_node); |
| 504 | BUG_ON(buffer->free); |
| 505 | |
| 506 | if (new_buffer < buffer) |
| 507 | p = &parent->rb_left; |
| 508 | else if (new_buffer > buffer) |
| 509 | p = &parent->rb_right; |
| 510 | else |
| 511 | BUG(); |
| 512 | } |
| 513 | rb_link_node(&new_buffer->rb_node, parent, p); |
| 514 | rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers); |
| 515 | } |
| 516 | |
| 517 | static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc, |
| 518 | void __user *user_ptr) |
| 519 | { |
| 520 | struct rb_node *n = proc->allocated_buffers.rb_node; |
| 521 | struct binder_buffer *buffer; |
| 522 | struct binder_buffer *kern_ptr; |
| 523 | |
| 524 | kern_ptr = user_ptr - proc->user_buffer_offset |
| 525 | - offsetof(struct binder_buffer, data); |
| 526 | |
| 527 | while (n) { |
| 528 | buffer = rb_entry(n, struct binder_buffer, rb_node); |
| 529 | BUG_ON(buffer->free); |
| 530 | |
| 531 | if (kern_ptr < buffer) |
| 532 | n = n->rb_left; |
| 533 | else if (kern_ptr > buffer) |
| 534 | n = n->rb_right; |
| 535 | else |
| 536 | return buffer; |
| 537 | } |
| 538 | return NULL; |
| 539 | } |
| 540 | |
| 541 | static int binder_update_page_range(struct binder_proc *proc, int allocate, |
| 542 | void *start, void *end, |
| 543 | struct vm_area_struct *vma) |
| 544 | { |
| 545 | void *page_addr; |
| 546 | unsigned long user_page_addr; |
| 547 | struct vm_struct tmp_area; |
| 548 | struct page **page; |
| 549 | struct mm_struct *mm; |
| 550 | |
| 551 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 552 | "%d: %s pages %p-%p\n", proc->pid, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 553 | allocate ? "allocate" : "free", start, end); |
| 554 | |
| 555 | if (end <= start) |
| 556 | return 0; |
| 557 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 558 | trace_binder_update_page_range(proc, allocate, start, end); |
| 559 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 560 | if (vma) |
| 561 | mm = NULL; |
| 562 | else |
| 563 | mm = get_task_mm(proc->tsk); |
| 564 | |
| 565 | if (mm) { |
| 566 | down_write(&mm->mmap_sem); |
| 567 | vma = proc->vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 568 | if (vma && mm != proc->vma_vm_mm) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 569 | pr_err("%d: vma mm and task mm mismatch\n", |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 570 | proc->pid); |
| 571 | vma = NULL; |
| 572 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | if (allocate == 0) |
| 576 | goto free_range; |
| 577 | |
| 578 | if (vma == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 579 | pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n", |
| 580 | proc->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 581 | goto err_no_vma; |
| 582 | } |
| 583 | |
| 584 | for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) { |
| 585 | int ret; |
| 586 | struct page **page_array_ptr; |
| 587 | page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; |
| 588 | |
| 589 | BUG_ON(*page); |
Arve Hjønnevåg | 585650d | 2012-10-16 15:29:55 -0700 | [diff] [blame] | 590 | *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 591 | if (*page == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 592 | pr_err("%d: binder_alloc_buf failed for page at %p\n", |
| 593 | proc->pid, page_addr); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 594 | goto err_alloc_page_failed; |
| 595 | } |
| 596 | tmp_area.addr = page_addr; |
| 597 | tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */; |
| 598 | page_array_ptr = page; |
| 599 | ret = map_vm_area(&tmp_area, PAGE_KERNEL, &page_array_ptr); |
| 600 | if (ret) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 601 | pr_err("%d: binder_alloc_buf failed to map page at %p in kernel\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 602 | proc->pid, page_addr); |
| 603 | goto err_map_kernel_failed; |
| 604 | } |
| 605 | user_page_addr = |
| 606 | (uintptr_t)page_addr + proc->user_buffer_offset; |
| 607 | ret = vm_insert_page(vma, user_page_addr, page[0]); |
| 608 | if (ret) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 609 | pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 610 | proc->pid, user_page_addr); |
| 611 | goto err_vm_insert_page_failed; |
| 612 | } |
| 613 | /* vm_insert_page does not seem to increment the refcount */ |
| 614 | } |
| 615 | if (mm) { |
| 616 | up_write(&mm->mmap_sem); |
| 617 | mmput(mm); |
| 618 | } |
| 619 | return 0; |
| 620 | |
| 621 | free_range: |
| 622 | for (page_addr = end - PAGE_SIZE; page_addr >= start; |
| 623 | page_addr -= PAGE_SIZE) { |
| 624 | page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; |
| 625 | if (vma) |
| 626 | zap_page_range(vma, (uintptr_t)page_addr + |
| 627 | proc->user_buffer_offset, PAGE_SIZE, NULL); |
| 628 | err_vm_insert_page_failed: |
| 629 | unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE); |
| 630 | err_map_kernel_failed: |
| 631 | __free_page(*page); |
| 632 | *page = NULL; |
| 633 | err_alloc_page_failed: |
| 634 | ; |
| 635 | } |
| 636 | err_no_vma: |
| 637 | if (mm) { |
| 638 | up_write(&mm->mmap_sem); |
| 639 | mmput(mm); |
| 640 | } |
| 641 | return -ENOMEM; |
| 642 | } |
| 643 | |
| 644 | static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc, |
| 645 | size_t data_size, |
| 646 | size_t offsets_size, int is_async) |
| 647 | { |
| 648 | struct rb_node *n = proc->free_buffers.rb_node; |
| 649 | struct binder_buffer *buffer; |
| 650 | size_t buffer_size; |
| 651 | struct rb_node *best_fit = NULL; |
| 652 | void *has_page_addr; |
| 653 | void *end_page_addr; |
| 654 | size_t size; |
| 655 | |
| 656 | if (proc->vma == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 657 | pr_err("%d: binder_alloc_buf, no vma\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 658 | proc->pid); |
| 659 | return NULL; |
| 660 | } |
| 661 | |
| 662 | size = ALIGN(data_size, sizeof(void *)) + |
| 663 | ALIGN(offsets_size, sizeof(void *)); |
| 664 | |
| 665 | if (size < data_size || size < offsets_size) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 666 | binder_user_error("%d: got transaction with invalid size %zd-%zd\n", |
| 667 | proc->pid, data_size, offsets_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 668 | return NULL; |
| 669 | } |
| 670 | |
| 671 | if (is_async && |
| 672 | proc->free_async_space < size + sizeof(struct binder_buffer)) { |
| 673 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 674 | "%d: binder_alloc_buf size %zd failed, no async space left\n", |
| 675 | proc->pid, size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 676 | return NULL; |
| 677 | } |
| 678 | |
| 679 | while (n) { |
| 680 | buffer = rb_entry(n, struct binder_buffer, rb_node); |
| 681 | BUG_ON(!buffer->free); |
| 682 | buffer_size = binder_buffer_size(proc, buffer); |
| 683 | |
| 684 | if (size < buffer_size) { |
| 685 | best_fit = n; |
| 686 | n = n->rb_left; |
| 687 | } else if (size > buffer_size) |
| 688 | n = n->rb_right; |
| 689 | else { |
| 690 | best_fit = n; |
| 691 | break; |
| 692 | } |
| 693 | } |
| 694 | if (best_fit == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 695 | pr_err("%d: binder_alloc_buf size %zd failed, no address space\n", |
| 696 | proc->pid, size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 697 | return NULL; |
| 698 | } |
| 699 | if (n == NULL) { |
| 700 | buffer = rb_entry(best_fit, struct binder_buffer, rb_node); |
| 701 | buffer_size = binder_buffer_size(proc, buffer); |
| 702 | } |
| 703 | |
| 704 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 705 | "%d: binder_alloc_buf size %zd got buffer %p size %zd\n", |
| 706 | proc->pid, size, buffer, buffer_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 707 | |
| 708 | has_page_addr = |
| 709 | (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK); |
| 710 | if (n == NULL) { |
| 711 | if (size + sizeof(struct binder_buffer) + 4 >= buffer_size) |
| 712 | buffer_size = size; /* no room for other buffers */ |
| 713 | else |
| 714 | buffer_size = size + sizeof(struct binder_buffer); |
| 715 | } |
| 716 | end_page_addr = |
| 717 | (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size); |
| 718 | if (end_page_addr > has_page_addr) |
| 719 | end_page_addr = has_page_addr; |
| 720 | if (binder_update_page_range(proc, 1, |
| 721 | (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL)) |
| 722 | return NULL; |
| 723 | |
| 724 | rb_erase(best_fit, &proc->free_buffers); |
| 725 | buffer->free = 0; |
| 726 | binder_insert_allocated_buffer(proc, buffer); |
| 727 | if (buffer_size != size) { |
| 728 | struct binder_buffer *new_buffer = (void *)buffer->data + size; |
| 729 | list_add(&new_buffer->entry, &buffer->entry); |
| 730 | new_buffer->free = 1; |
| 731 | binder_insert_free_buffer(proc, new_buffer); |
| 732 | } |
| 733 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 734 | "%d: binder_alloc_buf size %zd got %p\n", |
| 735 | proc->pid, size, buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 736 | buffer->data_size = data_size; |
| 737 | buffer->offsets_size = offsets_size; |
| 738 | buffer->async_transaction = is_async; |
| 739 | if (is_async) { |
| 740 | proc->free_async_space -= size + sizeof(struct binder_buffer); |
| 741 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 742 | "%d: binder_alloc_buf size %zd async free %zd\n", |
| 743 | proc->pid, size, proc->free_async_space); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | return buffer; |
| 747 | } |
| 748 | |
| 749 | static void *buffer_start_page(struct binder_buffer *buffer) |
| 750 | { |
| 751 | return (void *)((uintptr_t)buffer & PAGE_MASK); |
| 752 | } |
| 753 | |
| 754 | static void *buffer_end_page(struct binder_buffer *buffer) |
| 755 | { |
| 756 | return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK); |
| 757 | } |
| 758 | |
| 759 | static void binder_delete_free_buffer(struct binder_proc *proc, |
| 760 | struct binder_buffer *buffer) |
| 761 | { |
| 762 | struct binder_buffer *prev, *next = NULL; |
| 763 | int free_page_end = 1; |
| 764 | int free_page_start = 1; |
| 765 | |
| 766 | BUG_ON(proc->buffers.next == &buffer->entry); |
| 767 | prev = list_entry(buffer->entry.prev, struct binder_buffer, entry); |
| 768 | BUG_ON(!prev->free); |
| 769 | if (buffer_end_page(prev) == buffer_start_page(buffer)) { |
| 770 | free_page_start = 0; |
| 771 | if (buffer_end_page(prev) == buffer_end_page(buffer)) |
| 772 | free_page_end = 0; |
| 773 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 774 | "%d: merge free, buffer %p share page with %p\n", |
| 775 | proc->pid, buffer, prev); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 776 | } |
| 777 | |
| 778 | if (!list_is_last(&buffer->entry, &proc->buffers)) { |
| 779 | next = list_entry(buffer->entry.next, |
| 780 | struct binder_buffer, entry); |
| 781 | if (buffer_start_page(next) == buffer_end_page(buffer)) { |
| 782 | free_page_end = 0; |
| 783 | if (buffer_start_page(next) == |
| 784 | buffer_start_page(buffer)) |
| 785 | free_page_start = 0; |
| 786 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 787 | "%d: merge free, buffer %p share page with %p\n", |
| 788 | proc->pid, buffer, prev); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 789 | } |
| 790 | } |
| 791 | list_del(&buffer->entry); |
| 792 | if (free_page_start || free_page_end) { |
| 793 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 794 | "%d: merge free, buffer %p do not share page%s%s with with %p or %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 795 | proc->pid, buffer, free_page_start ? "" : " end", |
| 796 | free_page_end ? "" : " start", prev, next); |
| 797 | binder_update_page_range(proc, 0, free_page_start ? |
| 798 | buffer_start_page(buffer) : buffer_end_page(buffer), |
| 799 | (free_page_end ? buffer_end_page(buffer) : |
| 800 | buffer_start_page(buffer)) + PAGE_SIZE, NULL); |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | static void binder_free_buf(struct binder_proc *proc, |
| 805 | struct binder_buffer *buffer) |
| 806 | { |
| 807 | size_t size, buffer_size; |
| 808 | |
| 809 | buffer_size = binder_buffer_size(proc, buffer); |
| 810 | |
| 811 | size = ALIGN(buffer->data_size, sizeof(void *)) + |
| 812 | ALIGN(buffer->offsets_size, sizeof(void *)); |
| 813 | |
| 814 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 815 | "%d: binder_free_buf %p size %zd buffer_size %zd\n", |
| 816 | proc->pid, buffer, size, buffer_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 817 | |
| 818 | BUG_ON(buffer->free); |
| 819 | BUG_ON(size > buffer_size); |
| 820 | BUG_ON(buffer->transaction != NULL); |
| 821 | BUG_ON((void *)buffer < proc->buffer); |
| 822 | BUG_ON((void *)buffer > proc->buffer + proc->buffer_size); |
| 823 | |
| 824 | if (buffer->async_transaction) { |
| 825 | proc->free_async_space += size + sizeof(struct binder_buffer); |
| 826 | |
| 827 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 828 | "%d: binder_free_buf size %zd async free %zd\n", |
| 829 | proc->pid, size, proc->free_async_space); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 830 | } |
| 831 | |
| 832 | binder_update_page_range(proc, 0, |
| 833 | (void *)PAGE_ALIGN((uintptr_t)buffer->data), |
| 834 | (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK), |
| 835 | NULL); |
| 836 | rb_erase(&buffer->rb_node, &proc->allocated_buffers); |
| 837 | buffer->free = 1; |
| 838 | if (!list_is_last(&buffer->entry, &proc->buffers)) { |
| 839 | struct binder_buffer *next = list_entry(buffer->entry.next, |
| 840 | struct binder_buffer, entry); |
| 841 | if (next->free) { |
| 842 | rb_erase(&next->rb_node, &proc->free_buffers); |
| 843 | binder_delete_free_buffer(proc, next); |
| 844 | } |
| 845 | } |
| 846 | if (proc->buffers.next != &buffer->entry) { |
| 847 | struct binder_buffer *prev = list_entry(buffer->entry.prev, |
| 848 | struct binder_buffer, entry); |
| 849 | if (prev->free) { |
| 850 | binder_delete_free_buffer(proc, buffer); |
| 851 | rb_erase(&prev->rb_node, &proc->free_buffers); |
| 852 | buffer = prev; |
| 853 | } |
| 854 | } |
| 855 | binder_insert_free_buffer(proc, buffer); |
| 856 | } |
| 857 | |
| 858 | static struct binder_node *binder_get_node(struct binder_proc *proc, |
| 859 | void __user *ptr) |
| 860 | { |
| 861 | struct rb_node *n = proc->nodes.rb_node; |
| 862 | struct binder_node *node; |
| 863 | |
| 864 | while (n) { |
| 865 | node = rb_entry(n, struct binder_node, rb_node); |
| 866 | |
| 867 | if (ptr < node->ptr) |
| 868 | n = n->rb_left; |
| 869 | else if (ptr > node->ptr) |
| 870 | n = n->rb_right; |
| 871 | else |
| 872 | return node; |
| 873 | } |
| 874 | return NULL; |
| 875 | } |
| 876 | |
| 877 | static struct binder_node *binder_new_node(struct binder_proc *proc, |
| 878 | void __user *ptr, |
| 879 | void __user *cookie) |
| 880 | { |
| 881 | struct rb_node **p = &proc->nodes.rb_node; |
| 882 | struct rb_node *parent = NULL; |
| 883 | struct binder_node *node; |
| 884 | |
| 885 | while (*p) { |
| 886 | parent = *p; |
| 887 | node = rb_entry(parent, struct binder_node, rb_node); |
| 888 | |
| 889 | if (ptr < node->ptr) |
| 890 | p = &(*p)->rb_left; |
| 891 | else if (ptr > node->ptr) |
| 892 | p = &(*p)->rb_right; |
| 893 | else |
| 894 | return NULL; |
| 895 | } |
| 896 | |
| 897 | node = kzalloc(sizeof(*node), GFP_KERNEL); |
| 898 | if (node == NULL) |
| 899 | return NULL; |
| 900 | binder_stats_created(BINDER_STAT_NODE); |
| 901 | rb_link_node(&node->rb_node, parent, p); |
| 902 | rb_insert_color(&node->rb_node, &proc->nodes); |
| 903 | node->debug_id = ++binder_last_id; |
| 904 | node->proc = proc; |
| 905 | node->ptr = ptr; |
| 906 | node->cookie = cookie; |
| 907 | node->work.type = BINDER_WORK_NODE; |
| 908 | INIT_LIST_HEAD(&node->work.entry); |
| 909 | INIT_LIST_HEAD(&node->async_todo); |
| 910 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 911 | "%d:%d node %d u%p c%p created\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 912 | proc->pid, current->pid, node->debug_id, |
| 913 | node->ptr, node->cookie); |
| 914 | return node; |
| 915 | } |
| 916 | |
| 917 | static int binder_inc_node(struct binder_node *node, int strong, int internal, |
| 918 | struct list_head *target_list) |
| 919 | { |
| 920 | if (strong) { |
| 921 | if (internal) { |
| 922 | if (target_list == NULL && |
| 923 | node->internal_strong_refs == 0 && |
| 924 | !(node == binder_context_mgr_node && |
| 925 | node->has_strong_ref)) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 926 | pr_err("invalid inc strong node for %d\n", |
| 927 | node->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 928 | return -EINVAL; |
| 929 | } |
| 930 | node->internal_strong_refs++; |
| 931 | } else |
| 932 | node->local_strong_refs++; |
| 933 | if (!node->has_strong_ref && target_list) { |
| 934 | list_del_init(&node->work.entry); |
| 935 | list_add_tail(&node->work.entry, target_list); |
| 936 | } |
| 937 | } else { |
| 938 | if (!internal) |
| 939 | node->local_weak_refs++; |
| 940 | if (!node->has_weak_ref && list_empty(&node->work.entry)) { |
| 941 | if (target_list == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 942 | pr_err("invalid inc weak node for %d\n", |
| 943 | node->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 944 | return -EINVAL; |
| 945 | } |
| 946 | list_add_tail(&node->work.entry, target_list); |
| 947 | } |
| 948 | } |
| 949 | return 0; |
| 950 | } |
| 951 | |
| 952 | static int binder_dec_node(struct binder_node *node, int strong, int internal) |
| 953 | { |
| 954 | if (strong) { |
| 955 | if (internal) |
| 956 | node->internal_strong_refs--; |
| 957 | else |
| 958 | node->local_strong_refs--; |
| 959 | if (node->local_strong_refs || node->internal_strong_refs) |
| 960 | return 0; |
| 961 | } else { |
| 962 | if (!internal) |
| 963 | node->local_weak_refs--; |
| 964 | if (node->local_weak_refs || !hlist_empty(&node->refs)) |
| 965 | return 0; |
| 966 | } |
| 967 | if (node->proc && (node->has_strong_ref || node->has_weak_ref)) { |
| 968 | if (list_empty(&node->work.entry)) { |
| 969 | list_add_tail(&node->work.entry, &node->proc->todo); |
| 970 | wake_up_interruptible(&node->proc->wait); |
| 971 | } |
| 972 | } else { |
| 973 | if (hlist_empty(&node->refs) && !node->local_strong_refs && |
| 974 | !node->local_weak_refs) { |
| 975 | list_del_init(&node->work.entry); |
| 976 | if (node->proc) { |
| 977 | rb_erase(&node->rb_node, &node->proc->nodes); |
| 978 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 979 | "refless node %d deleted\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 980 | node->debug_id); |
| 981 | } else { |
| 982 | hlist_del(&node->dead_node); |
| 983 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 984 | "dead node %d deleted\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 985 | node->debug_id); |
| 986 | } |
| 987 | kfree(node); |
| 988 | binder_stats_deleted(BINDER_STAT_NODE); |
| 989 | } |
| 990 | } |
| 991 | |
| 992 | return 0; |
| 993 | } |
| 994 | |
| 995 | |
| 996 | static struct binder_ref *binder_get_ref(struct binder_proc *proc, |
| 997 | uint32_t desc) |
| 998 | { |
| 999 | struct rb_node *n = proc->refs_by_desc.rb_node; |
| 1000 | struct binder_ref *ref; |
| 1001 | |
| 1002 | while (n) { |
| 1003 | ref = rb_entry(n, struct binder_ref, rb_node_desc); |
| 1004 | |
| 1005 | if (desc < ref->desc) |
| 1006 | n = n->rb_left; |
| 1007 | else if (desc > ref->desc) |
| 1008 | n = n->rb_right; |
| 1009 | else |
| 1010 | return ref; |
| 1011 | } |
| 1012 | return NULL; |
| 1013 | } |
| 1014 | |
| 1015 | static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc, |
| 1016 | struct binder_node *node) |
| 1017 | { |
| 1018 | struct rb_node *n; |
| 1019 | struct rb_node **p = &proc->refs_by_node.rb_node; |
| 1020 | struct rb_node *parent = NULL; |
| 1021 | struct binder_ref *ref, *new_ref; |
| 1022 | |
| 1023 | while (*p) { |
| 1024 | parent = *p; |
| 1025 | ref = rb_entry(parent, struct binder_ref, rb_node_node); |
| 1026 | |
| 1027 | if (node < ref->node) |
| 1028 | p = &(*p)->rb_left; |
| 1029 | else if (node > ref->node) |
| 1030 | p = &(*p)->rb_right; |
| 1031 | else |
| 1032 | return ref; |
| 1033 | } |
| 1034 | new_ref = kzalloc(sizeof(*ref), GFP_KERNEL); |
| 1035 | if (new_ref == NULL) |
| 1036 | return NULL; |
| 1037 | binder_stats_created(BINDER_STAT_REF); |
| 1038 | new_ref->debug_id = ++binder_last_id; |
| 1039 | new_ref->proc = proc; |
| 1040 | new_ref->node = node; |
| 1041 | rb_link_node(&new_ref->rb_node_node, parent, p); |
| 1042 | rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node); |
| 1043 | |
| 1044 | new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1; |
| 1045 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
| 1046 | ref = rb_entry(n, struct binder_ref, rb_node_desc); |
| 1047 | if (ref->desc > new_ref->desc) |
| 1048 | break; |
| 1049 | new_ref->desc = ref->desc + 1; |
| 1050 | } |
| 1051 | |
| 1052 | p = &proc->refs_by_desc.rb_node; |
| 1053 | while (*p) { |
| 1054 | parent = *p; |
| 1055 | ref = rb_entry(parent, struct binder_ref, rb_node_desc); |
| 1056 | |
| 1057 | if (new_ref->desc < ref->desc) |
| 1058 | p = &(*p)->rb_left; |
| 1059 | else if (new_ref->desc > ref->desc) |
| 1060 | p = &(*p)->rb_right; |
| 1061 | else |
| 1062 | BUG(); |
| 1063 | } |
| 1064 | rb_link_node(&new_ref->rb_node_desc, parent, p); |
| 1065 | rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc); |
| 1066 | if (node) { |
| 1067 | hlist_add_head(&new_ref->node_entry, &node->refs); |
| 1068 | |
| 1069 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1070 | "%d new ref %d desc %d for node %d\n", |
| 1071 | proc->pid, new_ref->debug_id, new_ref->desc, |
| 1072 | node->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1073 | } else { |
| 1074 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1075 | "%d new ref %d desc %d for dead node\n", |
| 1076 | proc->pid, new_ref->debug_id, new_ref->desc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1077 | } |
| 1078 | return new_ref; |
| 1079 | } |
| 1080 | |
| 1081 | static void binder_delete_ref(struct binder_ref *ref) |
| 1082 | { |
| 1083 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1084 | "%d delete ref %d desc %d for node %d\n", |
| 1085 | ref->proc->pid, ref->debug_id, ref->desc, |
| 1086 | ref->node->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1087 | |
| 1088 | rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc); |
| 1089 | rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node); |
| 1090 | if (ref->strong) |
| 1091 | binder_dec_node(ref->node, 1, 1); |
| 1092 | hlist_del(&ref->node_entry); |
| 1093 | binder_dec_node(ref->node, 0, 1); |
| 1094 | if (ref->death) { |
| 1095 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1096 | "%d delete ref %d desc %d has death notification\n", |
| 1097 | ref->proc->pid, ref->debug_id, ref->desc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1098 | list_del(&ref->death->work.entry); |
| 1099 | kfree(ref->death); |
| 1100 | binder_stats_deleted(BINDER_STAT_DEATH); |
| 1101 | } |
| 1102 | kfree(ref); |
| 1103 | binder_stats_deleted(BINDER_STAT_REF); |
| 1104 | } |
| 1105 | |
| 1106 | static int binder_inc_ref(struct binder_ref *ref, int strong, |
| 1107 | struct list_head *target_list) |
| 1108 | { |
| 1109 | int ret; |
| 1110 | if (strong) { |
| 1111 | if (ref->strong == 0) { |
| 1112 | ret = binder_inc_node(ref->node, 1, 1, target_list); |
| 1113 | if (ret) |
| 1114 | return ret; |
| 1115 | } |
| 1116 | ref->strong++; |
| 1117 | } else { |
| 1118 | if (ref->weak == 0) { |
| 1119 | ret = binder_inc_node(ref->node, 0, 1, target_list); |
| 1120 | if (ret) |
| 1121 | return ret; |
| 1122 | } |
| 1123 | ref->weak++; |
| 1124 | } |
| 1125 | return 0; |
| 1126 | } |
| 1127 | |
| 1128 | |
| 1129 | static int binder_dec_ref(struct binder_ref *ref, int strong) |
| 1130 | { |
| 1131 | if (strong) { |
| 1132 | if (ref->strong == 0) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1133 | binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1134 | ref->proc->pid, ref->debug_id, |
| 1135 | ref->desc, ref->strong, ref->weak); |
| 1136 | return -EINVAL; |
| 1137 | } |
| 1138 | ref->strong--; |
| 1139 | if (ref->strong == 0) { |
| 1140 | int ret; |
| 1141 | ret = binder_dec_node(ref->node, strong, 1); |
| 1142 | if (ret) |
| 1143 | return ret; |
| 1144 | } |
| 1145 | } else { |
| 1146 | if (ref->weak == 0) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1147 | binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1148 | ref->proc->pid, ref->debug_id, |
| 1149 | ref->desc, ref->strong, ref->weak); |
| 1150 | return -EINVAL; |
| 1151 | } |
| 1152 | ref->weak--; |
| 1153 | } |
| 1154 | if (ref->strong == 0 && ref->weak == 0) |
| 1155 | binder_delete_ref(ref); |
| 1156 | return 0; |
| 1157 | } |
| 1158 | |
| 1159 | static void binder_pop_transaction(struct binder_thread *target_thread, |
| 1160 | struct binder_transaction *t) |
| 1161 | { |
| 1162 | if (target_thread) { |
| 1163 | BUG_ON(target_thread->transaction_stack != t); |
| 1164 | BUG_ON(target_thread->transaction_stack->from != target_thread); |
| 1165 | target_thread->transaction_stack = |
| 1166 | target_thread->transaction_stack->from_parent; |
| 1167 | t->from = NULL; |
| 1168 | } |
| 1169 | t->need_reply = 0; |
| 1170 | if (t->buffer) |
| 1171 | t->buffer->transaction = NULL; |
| 1172 | kfree(t); |
| 1173 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 1174 | } |
| 1175 | |
| 1176 | static void binder_send_failed_reply(struct binder_transaction *t, |
| 1177 | uint32_t error_code) |
| 1178 | { |
| 1179 | struct binder_thread *target_thread; |
| 1180 | BUG_ON(t->flags & TF_ONE_WAY); |
| 1181 | while (1) { |
| 1182 | target_thread = t->from; |
| 1183 | if (target_thread) { |
| 1184 | if (target_thread->return_error != BR_OK && |
| 1185 | target_thread->return_error2 == BR_OK) { |
| 1186 | target_thread->return_error2 = |
| 1187 | target_thread->return_error; |
| 1188 | target_thread->return_error = BR_OK; |
| 1189 | } |
| 1190 | if (target_thread->return_error == BR_OK) { |
| 1191 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1192 | "send failed reply for transaction %d to %d:%d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1193 | t->debug_id, target_thread->proc->pid, |
| 1194 | target_thread->pid); |
| 1195 | |
| 1196 | binder_pop_transaction(target_thread, t); |
| 1197 | target_thread->return_error = error_code; |
| 1198 | wake_up_interruptible(&target_thread->wait); |
| 1199 | } else { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1200 | pr_err("reply failed, target thread, %d:%d, has error code %d already\n", |
| 1201 | target_thread->proc->pid, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1202 | target_thread->pid, |
| 1203 | target_thread->return_error); |
| 1204 | } |
| 1205 | return; |
| 1206 | } else { |
| 1207 | struct binder_transaction *next = t->from_parent; |
| 1208 | |
| 1209 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1210 | "send failed reply for transaction %d, target dead\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1211 | t->debug_id); |
| 1212 | |
| 1213 | binder_pop_transaction(target_thread, t); |
| 1214 | if (next == NULL) { |
| 1215 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1216 | "reply failed, no target thread at root\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1217 | return; |
| 1218 | } |
| 1219 | t = next; |
| 1220 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1221 | "reply failed, no target thread -- retry %d\n", |
| 1222 | t->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1223 | } |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | static void binder_transaction_buffer_release(struct binder_proc *proc, |
| 1228 | struct binder_buffer *buffer, |
| 1229 | size_t *failed_at) |
| 1230 | { |
| 1231 | size_t *offp, *off_end; |
| 1232 | int debug_id = buffer->debug_id; |
| 1233 | |
| 1234 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1235 | "%d buffer release %d, size %zd-%zd, failed at %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1236 | proc->pid, buffer->debug_id, |
| 1237 | buffer->data_size, buffer->offsets_size, failed_at); |
| 1238 | |
| 1239 | if (buffer->target_node) |
| 1240 | binder_dec_node(buffer->target_node, 1, 0); |
| 1241 | |
| 1242 | offp = (size_t *)(buffer->data + ALIGN(buffer->data_size, sizeof(void *))); |
| 1243 | if (failed_at) |
| 1244 | off_end = failed_at; |
| 1245 | else |
| 1246 | off_end = (void *)offp + buffer->offsets_size; |
| 1247 | for (; offp < off_end; offp++) { |
| 1248 | struct flat_binder_object *fp; |
| 1249 | if (*offp > buffer->data_size - sizeof(*fp) || |
| 1250 | buffer->data_size < sizeof(*fp) || |
| 1251 | !IS_ALIGNED(*offp, sizeof(void *))) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1252 | pr_err("transaction release %d bad offset %zd, size %zd\n", |
| 1253 | debug_id, *offp, buffer->data_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1254 | continue; |
| 1255 | } |
| 1256 | fp = (struct flat_binder_object *)(buffer->data + *offp); |
| 1257 | switch (fp->type) { |
| 1258 | case BINDER_TYPE_BINDER: |
| 1259 | case BINDER_TYPE_WEAK_BINDER: { |
| 1260 | struct binder_node *node = binder_get_node(proc, fp->binder); |
| 1261 | if (node == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1262 | pr_err("transaction release %d bad node %p\n", |
| 1263 | debug_id, fp->binder); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1264 | break; |
| 1265 | } |
| 1266 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1267 | " node %d u%p\n", |
| 1268 | node->debug_id, node->ptr); |
| 1269 | binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0); |
| 1270 | } break; |
| 1271 | case BINDER_TYPE_HANDLE: |
| 1272 | case BINDER_TYPE_WEAK_HANDLE: { |
| 1273 | struct binder_ref *ref = binder_get_ref(proc, fp->handle); |
| 1274 | if (ref == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1275 | pr_err("transaction release %d bad handle %ld\n", |
| 1276 | debug_id, fp->handle); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1277 | break; |
| 1278 | } |
| 1279 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1280 | " ref %d desc %d (node %d)\n", |
| 1281 | ref->debug_id, ref->desc, ref->node->debug_id); |
| 1282 | binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE); |
| 1283 | } break; |
| 1284 | |
| 1285 | case BINDER_TYPE_FD: |
| 1286 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1287 | " fd %ld\n", fp->handle); |
| 1288 | if (failed_at) |
| 1289 | task_close_fd(proc, fp->handle); |
| 1290 | break; |
| 1291 | |
| 1292 | default: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1293 | pr_err("transaction release %d bad object type %lx\n", |
| 1294 | debug_id, fp->type); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1295 | break; |
| 1296 | } |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | static void binder_transaction(struct binder_proc *proc, |
| 1301 | struct binder_thread *thread, |
| 1302 | struct binder_transaction_data *tr, int reply) |
| 1303 | { |
| 1304 | struct binder_transaction *t; |
| 1305 | struct binder_work *tcomplete; |
| 1306 | size_t *offp, *off_end; |
| 1307 | struct binder_proc *target_proc; |
| 1308 | struct binder_thread *target_thread = NULL; |
| 1309 | struct binder_node *target_node = NULL; |
| 1310 | struct list_head *target_list; |
| 1311 | wait_queue_head_t *target_wait; |
| 1312 | struct binder_transaction *in_reply_to = NULL; |
| 1313 | struct binder_transaction_log_entry *e; |
| 1314 | uint32_t return_error; |
| 1315 | |
| 1316 | e = binder_transaction_log_add(&binder_transaction_log); |
| 1317 | e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY); |
| 1318 | e->from_proc = proc->pid; |
| 1319 | e->from_thread = thread->pid; |
| 1320 | e->target_handle = tr->target.handle; |
| 1321 | e->data_size = tr->data_size; |
| 1322 | e->offsets_size = tr->offsets_size; |
| 1323 | |
| 1324 | if (reply) { |
| 1325 | in_reply_to = thread->transaction_stack; |
| 1326 | if (in_reply_to == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1327 | binder_user_error("%d:%d got reply transaction with no transaction stack\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1328 | proc->pid, thread->pid); |
| 1329 | return_error = BR_FAILED_REPLY; |
| 1330 | goto err_empty_call_stack; |
| 1331 | } |
| 1332 | binder_set_nice(in_reply_to->saved_priority); |
| 1333 | if (in_reply_to->to_thread != thread) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1334 | binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1335 | proc->pid, thread->pid, in_reply_to->debug_id, |
| 1336 | in_reply_to->to_proc ? |
| 1337 | in_reply_to->to_proc->pid : 0, |
| 1338 | in_reply_to->to_thread ? |
| 1339 | in_reply_to->to_thread->pid : 0); |
| 1340 | return_error = BR_FAILED_REPLY; |
| 1341 | in_reply_to = NULL; |
| 1342 | goto err_bad_call_stack; |
| 1343 | } |
| 1344 | thread->transaction_stack = in_reply_to->to_parent; |
| 1345 | target_thread = in_reply_to->from; |
| 1346 | if (target_thread == NULL) { |
| 1347 | return_error = BR_DEAD_REPLY; |
| 1348 | goto err_dead_binder; |
| 1349 | } |
| 1350 | if (target_thread->transaction_stack != in_reply_to) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1351 | binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1352 | proc->pid, thread->pid, |
| 1353 | target_thread->transaction_stack ? |
| 1354 | target_thread->transaction_stack->debug_id : 0, |
| 1355 | in_reply_to->debug_id); |
| 1356 | return_error = BR_FAILED_REPLY; |
| 1357 | in_reply_to = NULL; |
| 1358 | target_thread = NULL; |
| 1359 | goto err_dead_binder; |
| 1360 | } |
| 1361 | target_proc = target_thread->proc; |
| 1362 | } else { |
| 1363 | if (tr->target.handle) { |
| 1364 | struct binder_ref *ref; |
| 1365 | ref = binder_get_ref(proc, tr->target.handle); |
| 1366 | if (ref == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1367 | binder_user_error("%d:%d got transaction to invalid handle\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1368 | proc->pid, thread->pid); |
| 1369 | return_error = BR_FAILED_REPLY; |
| 1370 | goto err_invalid_target_handle; |
| 1371 | } |
| 1372 | target_node = ref->node; |
| 1373 | } else { |
| 1374 | target_node = binder_context_mgr_node; |
| 1375 | if (target_node == NULL) { |
| 1376 | return_error = BR_DEAD_REPLY; |
| 1377 | goto err_no_context_mgr_node; |
| 1378 | } |
| 1379 | } |
| 1380 | e->to_node = target_node->debug_id; |
| 1381 | target_proc = target_node->proc; |
| 1382 | if (target_proc == NULL) { |
| 1383 | return_error = BR_DEAD_REPLY; |
| 1384 | goto err_dead_binder; |
| 1385 | } |
| 1386 | if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) { |
| 1387 | struct binder_transaction *tmp; |
| 1388 | tmp = thread->transaction_stack; |
| 1389 | if (tmp->to_thread != thread) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1390 | binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1391 | proc->pid, thread->pid, tmp->debug_id, |
| 1392 | tmp->to_proc ? tmp->to_proc->pid : 0, |
| 1393 | tmp->to_thread ? |
| 1394 | tmp->to_thread->pid : 0); |
| 1395 | return_error = BR_FAILED_REPLY; |
| 1396 | goto err_bad_call_stack; |
| 1397 | } |
| 1398 | while (tmp) { |
| 1399 | if (tmp->from && tmp->from->proc == target_proc) |
| 1400 | target_thread = tmp->from; |
| 1401 | tmp = tmp->from_parent; |
| 1402 | } |
| 1403 | } |
| 1404 | } |
| 1405 | if (target_thread) { |
| 1406 | e->to_thread = target_thread->pid; |
| 1407 | target_list = &target_thread->todo; |
| 1408 | target_wait = &target_thread->wait; |
| 1409 | } else { |
| 1410 | target_list = &target_proc->todo; |
| 1411 | target_wait = &target_proc->wait; |
| 1412 | } |
| 1413 | e->to_proc = target_proc->pid; |
| 1414 | |
| 1415 | /* TODO: reuse incoming transaction for reply */ |
| 1416 | t = kzalloc(sizeof(*t), GFP_KERNEL); |
| 1417 | if (t == NULL) { |
| 1418 | return_error = BR_FAILED_REPLY; |
| 1419 | goto err_alloc_t_failed; |
| 1420 | } |
| 1421 | binder_stats_created(BINDER_STAT_TRANSACTION); |
| 1422 | |
| 1423 | tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL); |
| 1424 | if (tcomplete == NULL) { |
| 1425 | return_error = BR_FAILED_REPLY; |
| 1426 | goto err_alloc_tcomplete_failed; |
| 1427 | } |
| 1428 | binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE); |
| 1429 | |
| 1430 | t->debug_id = ++binder_last_id; |
| 1431 | e->debug_id = t->debug_id; |
| 1432 | |
| 1433 | if (reply) |
| 1434 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1435 | "%d:%d BC_REPLY %d -> %d:%d, data %p-%p size %zd-%zd\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1436 | proc->pid, thread->pid, t->debug_id, |
| 1437 | target_proc->pid, target_thread->pid, |
| 1438 | tr->data.ptr.buffer, tr->data.ptr.offsets, |
| 1439 | tr->data_size, tr->offsets_size); |
| 1440 | else |
| 1441 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1442 | "%d:%d BC_TRANSACTION %d -> %d - node %d, data %p-%p size %zd-%zd\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1443 | proc->pid, thread->pid, t->debug_id, |
| 1444 | target_proc->pid, target_node->debug_id, |
| 1445 | tr->data.ptr.buffer, tr->data.ptr.offsets, |
| 1446 | tr->data_size, tr->offsets_size); |
| 1447 | |
| 1448 | if (!reply && !(tr->flags & TF_ONE_WAY)) |
| 1449 | t->from = thread; |
| 1450 | else |
| 1451 | t->from = NULL; |
| 1452 | t->sender_euid = proc->tsk->cred->euid; |
| 1453 | t->to_proc = target_proc; |
| 1454 | t->to_thread = target_thread; |
| 1455 | t->code = tr->code; |
| 1456 | t->flags = tr->flags; |
| 1457 | t->priority = task_nice(current); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1458 | |
| 1459 | trace_binder_transaction(reply, t, target_node); |
| 1460 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1461 | t->buffer = binder_alloc_buf(target_proc, tr->data_size, |
| 1462 | tr->offsets_size, !reply && (t->flags & TF_ONE_WAY)); |
| 1463 | if (t->buffer == NULL) { |
| 1464 | return_error = BR_FAILED_REPLY; |
| 1465 | goto err_binder_alloc_buf_failed; |
| 1466 | } |
| 1467 | t->buffer->allow_user_free = 0; |
| 1468 | t->buffer->debug_id = t->debug_id; |
| 1469 | t->buffer->transaction = t; |
| 1470 | t->buffer->target_node = target_node; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1471 | trace_binder_transaction_alloc_buf(t->buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1472 | if (target_node) |
| 1473 | binder_inc_node(target_node, 1, 0, NULL); |
| 1474 | |
| 1475 | offp = (size_t *)(t->buffer->data + ALIGN(tr->data_size, sizeof(void *))); |
| 1476 | |
| 1477 | if (copy_from_user(t->buffer->data, tr->data.ptr.buffer, tr->data_size)) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1478 | binder_user_error("%d:%d got transaction with invalid data ptr\n", |
| 1479 | proc->pid, thread->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1480 | return_error = BR_FAILED_REPLY; |
| 1481 | goto err_copy_data_failed; |
| 1482 | } |
| 1483 | if (copy_from_user(offp, tr->data.ptr.offsets, tr->offsets_size)) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1484 | binder_user_error("%d:%d got transaction with invalid offsets ptr\n", |
| 1485 | proc->pid, thread->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1486 | return_error = BR_FAILED_REPLY; |
| 1487 | goto err_copy_data_failed; |
| 1488 | } |
| 1489 | if (!IS_ALIGNED(tr->offsets_size, sizeof(size_t))) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1490 | binder_user_error("%d:%d got transaction with invalid offsets size, %zd\n", |
| 1491 | proc->pid, thread->pid, tr->offsets_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1492 | return_error = BR_FAILED_REPLY; |
| 1493 | goto err_bad_offset; |
| 1494 | } |
| 1495 | off_end = (void *)offp + tr->offsets_size; |
| 1496 | for (; offp < off_end; offp++) { |
| 1497 | struct flat_binder_object *fp; |
| 1498 | if (*offp > t->buffer->data_size - sizeof(*fp) || |
| 1499 | t->buffer->data_size < sizeof(*fp) || |
| 1500 | !IS_ALIGNED(*offp, sizeof(void *))) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1501 | binder_user_error("%d:%d got transaction with invalid offset, %zd\n", |
| 1502 | proc->pid, thread->pid, *offp); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1503 | return_error = BR_FAILED_REPLY; |
| 1504 | goto err_bad_offset; |
| 1505 | } |
| 1506 | fp = (struct flat_binder_object *)(t->buffer->data + *offp); |
| 1507 | switch (fp->type) { |
| 1508 | case BINDER_TYPE_BINDER: |
| 1509 | case BINDER_TYPE_WEAK_BINDER: { |
| 1510 | struct binder_ref *ref; |
| 1511 | struct binder_node *node = binder_get_node(proc, fp->binder); |
| 1512 | if (node == NULL) { |
| 1513 | node = binder_new_node(proc, fp->binder, fp->cookie); |
| 1514 | if (node == NULL) { |
| 1515 | return_error = BR_FAILED_REPLY; |
| 1516 | goto err_binder_new_node_failed; |
| 1517 | } |
| 1518 | node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK; |
| 1519 | node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS); |
| 1520 | } |
| 1521 | if (fp->cookie != node->cookie) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1522 | binder_user_error("%d:%d sending u%p node %d, cookie mismatch %p != %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1523 | proc->pid, thread->pid, |
| 1524 | fp->binder, node->debug_id, |
| 1525 | fp->cookie, node->cookie); |
| 1526 | goto err_binder_get_ref_for_node_failed; |
| 1527 | } |
| 1528 | ref = binder_get_ref_for_node(target_proc, node); |
| 1529 | if (ref == NULL) { |
| 1530 | return_error = BR_FAILED_REPLY; |
| 1531 | goto err_binder_get_ref_for_node_failed; |
| 1532 | } |
| 1533 | if (fp->type == BINDER_TYPE_BINDER) |
| 1534 | fp->type = BINDER_TYPE_HANDLE; |
| 1535 | else |
| 1536 | fp->type = BINDER_TYPE_WEAK_HANDLE; |
| 1537 | fp->handle = ref->desc; |
| 1538 | binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE, |
| 1539 | &thread->todo); |
| 1540 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1541 | trace_binder_transaction_node_to_ref(t, node, ref); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1542 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1543 | " node %d u%p -> ref %d desc %d\n", |
| 1544 | node->debug_id, node->ptr, ref->debug_id, |
| 1545 | ref->desc); |
| 1546 | } break; |
| 1547 | case BINDER_TYPE_HANDLE: |
| 1548 | case BINDER_TYPE_WEAK_HANDLE: { |
| 1549 | struct binder_ref *ref = binder_get_ref(proc, fp->handle); |
| 1550 | if (ref == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1551 | binder_user_error("%d:%d got transaction with invalid handle, %ld\n", |
| 1552 | proc->pid, |
| 1553 | thread->pid, fp->handle); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1554 | return_error = BR_FAILED_REPLY; |
| 1555 | goto err_binder_get_ref_failed; |
| 1556 | } |
| 1557 | if (ref->node->proc == target_proc) { |
| 1558 | if (fp->type == BINDER_TYPE_HANDLE) |
| 1559 | fp->type = BINDER_TYPE_BINDER; |
| 1560 | else |
| 1561 | fp->type = BINDER_TYPE_WEAK_BINDER; |
| 1562 | fp->binder = ref->node->ptr; |
| 1563 | fp->cookie = ref->node->cookie; |
| 1564 | binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1565 | trace_binder_transaction_ref_to_node(t, ref); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1566 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1567 | " ref %d desc %d -> node %d u%p\n", |
| 1568 | ref->debug_id, ref->desc, ref->node->debug_id, |
| 1569 | ref->node->ptr); |
| 1570 | } else { |
| 1571 | struct binder_ref *new_ref; |
| 1572 | new_ref = binder_get_ref_for_node(target_proc, ref->node); |
| 1573 | if (new_ref == NULL) { |
| 1574 | return_error = BR_FAILED_REPLY; |
| 1575 | goto err_binder_get_ref_for_node_failed; |
| 1576 | } |
| 1577 | fp->handle = new_ref->desc; |
| 1578 | binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1579 | trace_binder_transaction_ref_to_ref(t, ref, |
| 1580 | new_ref); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1581 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1582 | " ref %d desc %d -> ref %d desc %d (node %d)\n", |
| 1583 | ref->debug_id, ref->desc, new_ref->debug_id, |
| 1584 | new_ref->desc, ref->node->debug_id); |
| 1585 | } |
| 1586 | } break; |
| 1587 | |
| 1588 | case BINDER_TYPE_FD: { |
| 1589 | int target_fd; |
| 1590 | struct file *file; |
| 1591 | |
| 1592 | if (reply) { |
| 1593 | if (!(in_reply_to->flags & TF_ACCEPT_FDS)) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1594 | binder_user_error("%d:%d got reply with fd, %ld, but target does not allow fds\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1595 | proc->pid, thread->pid, fp->handle); |
| 1596 | return_error = BR_FAILED_REPLY; |
| 1597 | goto err_fd_not_allowed; |
| 1598 | } |
| 1599 | } else if (!target_node->accept_fds) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1600 | binder_user_error("%d:%d got transaction with fd, %ld, but target does not allow fds\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1601 | proc->pid, thread->pid, fp->handle); |
| 1602 | return_error = BR_FAILED_REPLY; |
| 1603 | goto err_fd_not_allowed; |
| 1604 | } |
| 1605 | |
| 1606 | file = fget(fp->handle); |
| 1607 | if (file == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1608 | binder_user_error("%d:%d got transaction with invalid fd, %ld\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1609 | proc->pid, thread->pid, fp->handle); |
| 1610 | return_error = BR_FAILED_REPLY; |
| 1611 | goto err_fget_failed; |
| 1612 | } |
| 1613 | target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC); |
| 1614 | if (target_fd < 0) { |
| 1615 | fput(file); |
| 1616 | return_error = BR_FAILED_REPLY; |
| 1617 | goto err_get_unused_fd_failed; |
| 1618 | } |
| 1619 | task_fd_install(target_proc, target_fd, file); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1620 | trace_binder_transaction_fd(t, fp->handle, target_fd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1621 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1622 | " fd %ld -> %d\n", fp->handle, target_fd); |
| 1623 | /* TODO: fput? */ |
| 1624 | fp->handle = target_fd; |
| 1625 | } break; |
| 1626 | |
| 1627 | default: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1628 | binder_user_error("%d:%d got transaction with invalid object type, %lx\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1629 | proc->pid, thread->pid, fp->type); |
| 1630 | return_error = BR_FAILED_REPLY; |
| 1631 | goto err_bad_object_type; |
| 1632 | } |
| 1633 | } |
| 1634 | if (reply) { |
| 1635 | BUG_ON(t->buffer->async_transaction != 0); |
| 1636 | binder_pop_transaction(target_thread, in_reply_to); |
| 1637 | } else if (!(t->flags & TF_ONE_WAY)) { |
| 1638 | BUG_ON(t->buffer->async_transaction != 0); |
| 1639 | t->need_reply = 1; |
| 1640 | t->from_parent = thread->transaction_stack; |
| 1641 | thread->transaction_stack = t; |
| 1642 | } else { |
| 1643 | BUG_ON(target_node == NULL); |
| 1644 | BUG_ON(t->buffer->async_transaction != 1); |
| 1645 | if (target_node->has_async_transaction) { |
| 1646 | target_list = &target_node->async_todo; |
| 1647 | target_wait = NULL; |
| 1648 | } else |
| 1649 | target_node->has_async_transaction = 1; |
| 1650 | } |
| 1651 | t->work.type = BINDER_WORK_TRANSACTION; |
| 1652 | list_add_tail(&t->work.entry, target_list); |
| 1653 | tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE; |
| 1654 | list_add_tail(&tcomplete->entry, &thread->todo); |
| 1655 | if (target_wait) |
| 1656 | wake_up_interruptible(target_wait); |
| 1657 | return; |
| 1658 | |
| 1659 | err_get_unused_fd_failed: |
| 1660 | err_fget_failed: |
| 1661 | err_fd_not_allowed: |
| 1662 | err_binder_get_ref_for_node_failed: |
| 1663 | err_binder_get_ref_failed: |
| 1664 | err_binder_new_node_failed: |
| 1665 | err_bad_object_type: |
| 1666 | err_bad_offset: |
| 1667 | err_copy_data_failed: |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1668 | trace_binder_transaction_failed_buffer_release(t->buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1669 | binder_transaction_buffer_release(target_proc, t->buffer, offp); |
| 1670 | t->buffer->transaction = NULL; |
| 1671 | binder_free_buf(target_proc, t->buffer); |
| 1672 | err_binder_alloc_buf_failed: |
| 1673 | kfree(tcomplete); |
| 1674 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 1675 | err_alloc_tcomplete_failed: |
| 1676 | kfree(t); |
| 1677 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 1678 | err_alloc_t_failed: |
| 1679 | err_bad_call_stack: |
| 1680 | err_empty_call_stack: |
| 1681 | err_dead_binder: |
| 1682 | err_invalid_target_handle: |
| 1683 | err_no_context_mgr_node: |
| 1684 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1685 | "%d:%d transaction failed %d, size %zd-%zd\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1686 | proc->pid, thread->pid, return_error, |
| 1687 | tr->data_size, tr->offsets_size); |
| 1688 | |
| 1689 | { |
| 1690 | struct binder_transaction_log_entry *fe; |
| 1691 | fe = binder_transaction_log_add(&binder_transaction_log_failed); |
| 1692 | *fe = *e; |
| 1693 | } |
| 1694 | |
| 1695 | BUG_ON(thread->return_error != BR_OK); |
| 1696 | if (in_reply_to) { |
| 1697 | thread->return_error = BR_TRANSACTION_COMPLETE; |
| 1698 | binder_send_failed_reply(in_reply_to, return_error); |
| 1699 | } else |
| 1700 | thread->return_error = return_error; |
| 1701 | } |
| 1702 | |
| 1703 | int binder_thread_write(struct binder_proc *proc, struct binder_thread *thread, |
| 1704 | void __user *buffer, int size, signed long *consumed) |
| 1705 | { |
| 1706 | uint32_t cmd; |
| 1707 | void __user *ptr = buffer + *consumed; |
| 1708 | void __user *end = buffer + size; |
| 1709 | |
| 1710 | while (ptr < end && thread->return_error == BR_OK) { |
| 1711 | if (get_user(cmd, (uint32_t __user *)ptr)) |
| 1712 | return -EFAULT; |
| 1713 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1714 | trace_binder_command(cmd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 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) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1737 | binder_user_error("%d:%d tried to acquire reference to desc 0, got %d instead\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1738 | proc->pid, thread->pid, |
| 1739 | ref->desc); |
| 1740 | } |
| 1741 | } else |
| 1742 | ref = binder_get_ref(proc, target); |
| 1743 | if (ref == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1744 | binder_user_error("%d:%d refcount change on invalid ref %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1745 | proc->pid, thread->pid, target); |
| 1746 | break; |
| 1747 | } |
| 1748 | switch (cmd) { |
| 1749 | case BC_INCREFS: |
| 1750 | debug_string = "IncRefs"; |
| 1751 | binder_inc_ref(ref, 0, NULL); |
| 1752 | break; |
| 1753 | case BC_ACQUIRE: |
| 1754 | debug_string = "Acquire"; |
| 1755 | binder_inc_ref(ref, 1, NULL); |
| 1756 | break; |
| 1757 | case BC_RELEASE: |
| 1758 | debug_string = "Release"; |
| 1759 | binder_dec_ref(ref, 1); |
| 1760 | break; |
| 1761 | case BC_DECREFS: |
| 1762 | default: |
| 1763 | debug_string = "DecRefs"; |
| 1764 | binder_dec_ref(ref, 0); |
| 1765 | break; |
| 1766 | } |
| 1767 | binder_debug(BINDER_DEBUG_USER_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1768 | "%d:%d %s ref %d desc %d s %d w %d for node %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1769 | proc->pid, thread->pid, debug_string, ref->debug_id, |
| 1770 | ref->desc, ref->strong, ref->weak, ref->node->debug_id); |
| 1771 | break; |
| 1772 | } |
| 1773 | case BC_INCREFS_DONE: |
| 1774 | case BC_ACQUIRE_DONE: { |
| 1775 | void __user *node_ptr; |
| 1776 | void *cookie; |
| 1777 | struct binder_node *node; |
| 1778 | |
| 1779 | if (get_user(node_ptr, (void * __user *)ptr)) |
| 1780 | return -EFAULT; |
| 1781 | ptr += sizeof(void *); |
| 1782 | if (get_user(cookie, (void * __user *)ptr)) |
| 1783 | return -EFAULT; |
| 1784 | ptr += sizeof(void *); |
| 1785 | node = binder_get_node(proc, node_ptr); |
| 1786 | if (node == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1787 | binder_user_error("%d:%d %s u%p no match\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1788 | proc->pid, thread->pid, |
| 1789 | cmd == BC_INCREFS_DONE ? |
| 1790 | "BC_INCREFS_DONE" : |
| 1791 | "BC_ACQUIRE_DONE", |
| 1792 | node_ptr); |
| 1793 | break; |
| 1794 | } |
| 1795 | if (cookie != node->cookie) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1796 | binder_user_error("%d:%d %s u%p node %d cookie mismatch %p != %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1797 | proc->pid, thread->pid, |
| 1798 | cmd == BC_INCREFS_DONE ? |
| 1799 | "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", |
| 1800 | node_ptr, node->debug_id, |
| 1801 | cookie, node->cookie); |
| 1802 | break; |
| 1803 | } |
| 1804 | if (cmd == BC_ACQUIRE_DONE) { |
| 1805 | if (node->pending_strong_ref == 0) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1806 | binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1807 | proc->pid, thread->pid, |
| 1808 | node->debug_id); |
| 1809 | break; |
| 1810 | } |
| 1811 | node->pending_strong_ref = 0; |
| 1812 | } else { |
| 1813 | if (node->pending_weak_ref == 0) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1814 | binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1815 | proc->pid, thread->pid, |
| 1816 | node->debug_id); |
| 1817 | break; |
| 1818 | } |
| 1819 | node->pending_weak_ref = 0; |
| 1820 | } |
| 1821 | binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0); |
| 1822 | binder_debug(BINDER_DEBUG_USER_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1823 | "%d:%d %s node %d ls %d lw %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1824 | proc->pid, thread->pid, |
| 1825 | cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", |
| 1826 | node->debug_id, node->local_strong_refs, node->local_weak_refs); |
| 1827 | break; |
| 1828 | } |
| 1829 | case BC_ATTEMPT_ACQUIRE: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1830 | pr_err("BC_ATTEMPT_ACQUIRE not supported\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1831 | return -EINVAL; |
| 1832 | case BC_ACQUIRE_RESULT: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1833 | pr_err("BC_ACQUIRE_RESULT not supported\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1834 | return -EINVAL; |
| 1835 | |
| 1836 | case BC_FREE_BUFFER: { |
| 1837 | void __user *data_ptr; |
| 1838 | struct binder_buffer *buffer; |
| 1839 | |
| 1840 | if (get_user(data_ptr, (void * __user *)ptr)) |
| 1841 | return -EFAULT; |
| 1842 | ptr += sizeof(void *); |
| 1843 | |
| 1844 | buffer = binder_buffer_lookup(proc, data_ptr); |
| 1845 | if (buffer == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1846 | binder_user_error("%d:%d BC_FREE_BUFFER u%p no match\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1847 | proc->pid, thread->pid, data_ptr); |
| 1848 | break; |
| 1849 | } |
| 1850 | if (!buffer->allow_user_free) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1851 | binder_user_error("%d:%d BC_FREE_BUFFER u%p matched unreturned buffer\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1852 | proc->pid, thread->pid, data_ptr); |
| 1853 | break; |
| 1854 | } |
| 1855 | binder_debug(BINDER_DEBUG_FREE_BUFFER, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1856 | "%d:%d BC_FREE_BUFFER u%p found buffer %d for %s transaction\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1857 | proc->pid, thread->pid, data_ptr, buffer->debug_id, |
| 1858 | buffer->transaction ? "active" : "finished"); |
| 1859 | |
| 1860 | if (buffer->transaction) { |
| 1861 | buffer->transaction->buffer = NULL; |
| 1862 | buffer->transaction = NULL; |
| 1863 | } |
| 1864 | if (buffer->async_transaction && buffer->target_node) { |
| 1865 | BUG_ON(!buffer->target_node->has_async_transaction); |
| 1866 | if (list_empty(&buffer->target_node->async_todo)) |
| 1867 | buffer->target_node->has_async_transaction = 0; |
| 1868 | else |
| 1869 | list_move_tail(buffer->target_node->async_todo.next, &thread->todo); |
| 1870 | } |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1871 | trace_binder_transaction_buffer_release(buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1872 | binder_transaction_buffer_release(proc, buffer, NULL); |
| 1873 | binder_free_buf(proc, buffer); |
| 1874 | break; |
| 1875 | } |
| 1876 | |
| 1877 | case BC_TRANSACTION: |
| 1878 | case BC_REPLY: { |
| 1879 | struct binder_transaction_data tr; |
| 1880 | |
| 1881 | if (copy_from_user(&tr, ptr, sizeof(tr))) |
| 1882 | return -EFAULT; |
| 1883 | ptr += sizeof(tr); |
| 1884 | binder_transaction(proc, thread, &tr, cmd == BC_REPLY); |
| 1885 | break; |
| 1886 | } |
| 1887 | |
| 1888 | case BC_REGISTER_LOOPER: |
| 1889 | binder_debug(BINDER_DEBUG_THREADS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1890 | "%d:%d BC_REGISTER_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1891 | proc->pid, thread->pid); |
| 1892 | if (thread->looper & BINDER_LOOPER_STATE_ENTERED) { |
| 1893 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1894 | binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1895 | proc->pid, thread->pid); |
| 1896 | } else if (proc->requested_threads == 0) { |
| 1897 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1898 | binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1899 | proc->pid, thread->pid); |
| 1900 | } else { |
| 1901 | proc->requested_threads--; |
| 1902 | proc->requested_threads_started++; |
| 1903 | } |
| 1904 | thread->looper |= BINDER_LOOPER_STATE_REGISTERED; |
| 1905 | break; |
| 1906 | case BC_ENTER_LOOPER: |
| 1907 | binder_debug(BINDER_DEBUG_THREADS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1908 | "%d:%d BC_ENTER_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1909 | proc->pid, thread->pid); |
| 1910 | if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) { |
| 1911 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1912 | binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1913 | proc->pid, thread->pid); |
| 1914 | } |
| 1915 | thread->looper |= BINDER_LOOPER_STATE_ENTERED; |
| 1916 | break; |
| 1917 | case BC_EXIT_LOOPER: |
| 1918 | binder_debug(BINDER_DEBUG_THREADS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1919 | "%d:%d BC_EXIT_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1920 | proc->pid, thread->pid); |
| 1921 | thread->looper |= BINDER_LOOPER_STATE_EXITED; |
| 1922 | break; |
| 1923 | |
| 1924 | case BC_REQUEST_DEATH_NOTIFICATION: |
| 1925 | case BC_CLEAR_DEATH_NOTIFICATION: { |
| 1926 | uint32_t target; |
| 1927 | void __user *cookie; |
| 1928 | struct binder_ref *ref; |
| 1929 | struct binder_ref_death *death; |
| 1930 | |
| 1931 | if (get_user(target, (uint32_t __user *)ptr)) |
| 1932 | return -EFAULT; |
| 1933 | ptr += sizeof(uint32_t); |
| 1934 | if (get_user(cookie, (void __user * __user *)ptr)) |
| 1935 | return -EFAULT; |
| 1936 | ptr += sizeof(void *); |
| 1937 | ref = binder_get_ref(proc, target); |
| 1938 | if (ref == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1939 | binder_user_error("%d:%d %s invalid ref %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1940 | proc->pid, thread->pid, |
| 1941 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? |
| 1942 | "BC_REQUEST_DEATH_NOTIFICATION" : |
| 1943 | "BC_CLEAR_DEATH_NOTIFICATION", |
| 1944 | target); |
| 1945 | break; |
| 1946 | } |
| 1947 | |
| 1948 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1949 | "%d:%d %s %p ref %d desc %d s %d w %d for node %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1950 | proc->pid, thread->pid, |
| 1951 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? |
| 1952 | "BC_REQUEST_DEATH_NOTIFICATION" : |
| 1953 | "BC_CLEAR_DEATH_NOTIFICATION", |
| 1954 | cookie, ref->debug_id, ref->desc, |
| 1955 | ref->strong, ref->weak, ref->node->debug_id); |
| 1956 | |
| 1957 | if (cmd == BC_REQUEST_DEATH_NOTIFICATION) { |
| 1958 | if (ref->death) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1959 | binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1960 | proc->pid, thread->pid); |
| 1961 | break; |
| 1962 | } |
| 1963 | death = kzalloc(sizeof(*death), GFP_KERNEL); |
| 1964 | if (death == NULL) { |
| 1965 | thread->return_error = BR_ERROR; |
| 1966 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1967 | "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1968 | proc->pid, thread->pid); |
| 1969 | break; |
| 1970 | } |
| 1971 | binder_stats_created(BINDER_STAT_DEATH); |
| 1972 | INIT_LIST_HEAD(&death->work.entry); |
| 1973 | death->cookie = cookie; |
| 1974 | ref->death = death; |
| 1975 | if (ref->node->proc == NULL) { |
| 1976 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; |
| 1977 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 1978 | list_add_tail(&ref->death->work.entry, &thread->todo); |
| 1979 | } else { |
| 1980 | list_add_tail(&ref->death->work.entry, &proc->todo); |
| 1981 | wake_up_interruptible(&proc->wait); |
| 1982 | } |
| 1983 | } |
| 1984 | } else { |
| 1985 | if (ref->death == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1986 | binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1987 | proc->pid, thread->pid); |
| 1988 | break; |
| 1989 | } |
| 1990 | death = ref->death; |
| 1991 | if (death->cookie != cookie) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1992 | binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %p != %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1993 | proc->pid, thread->pid, |
| 1994 | death->cookie, cookie); |
| 1995 | break; |
| 1996 | } |
| 1997 | ref->death = NULL; |
| 1998 | if (list_empty(&death->work.entry)) { |
| 1999 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; |
| 2000 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 2001 | list_add_tail(&death->work.entry, &thread->todo); |
| 2002 | } else { |
| 2003 | list_add_tail(&death->work.entry, &proc->todo); |
| 2004 | wake_up_interruptible(&proc->wait); |
| 2005 | } |
| 2006 | } else { |
| 2007 | BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER); |
| 2008 | death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR; |
| 2009 | } |
| 2010 | } |
| 2011 | } break; |
| 2012 | case BC_DEAD_BINDER_DONE: { |
| 2013 | struct binder_work *w; |
| 2014 | void __user *cookie; |
| 2015 | struct binder_ref_death *death = NULL; |
| 2016 | if (get_user(cookie, (void __user * __user *)ptr)) |
| 2017 | return -EFAULT; |
| 2018 | |
| 2019 | ptr += sizeof(void *); |
| 2020 | list_for_each_entry(w, &proc->delivered_death, entry) { |
| 2021 | struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work); |
| 2022 | if (tmp_death->cookie == cookie) { |
| 2023 | death = tmp_death; |
| 2024 | break; |
| 2025 | } |
| 2026 | } |
| 2027 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2028 | "%d:%d BC_DEAD_BINDER_DONE %p found %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2029 | proc->pid, thread->pid, cookie, death); |
| 2030 | if (death == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2031 | binder_user_error("%d:%d BC_DEAD_BINDER_DONE %p not found\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2032 | proc->pid, thread->pid, cookie); |
| 2033 | break; |
| 2034 | } |
| 2035 | |
| 2036 | list_del_init(&death->work.entry); |
| 2037 | if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) { |
| 2038 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; |
| 2039 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 2040 | list_add_tail(&death->work.entry, &thread->todo); |
| 2041 | } else { |
| 2042 | list_add_tail(&death->work.entry, &proc->todo); |
| 2043 | wake_up_interruptible(&proc->wait); |
| 2044 | } |
| 2045 | } |
| 2046 | } break; |
| 2047 | |
| 2048 | default: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2049 | pr_err("%d:%d unknown command %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2050 | proc->pid, thread->pid, cmd); |
| 2051 | return -EINVAL; |
| 2052 | } |
| 2053 | *consumed = ptr - buffer; |
| 2054 | } |
| 2055 | return 0; |
| 2056 | } |
| 2057 | |
| 2058 | void binder_stat_br(struct binder_proc *proc, struct binder_thread *thread, |
| 2059 | uint32_t cmd) |
| 2060 | { |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2061 | trace_binder_return(cmd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2062 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) { |
| 2063 | binder_stats.br[_IOC_NR(cmd)]++; |
| 2064 | proc->stats.br[_IOC_NR(cmd)]++; |
| 2065 | thread->stats.br[_IOC_NR(cmd)]++; |
| 2066 | } |
| 2067 | } |
| 2068 | |
| 2069 | static int binder_has_proc_work(struct binder_proc *proc, |
| 2070 | struct binder_thread *thread) |
| 2071 | { |
| 2072 | return !list_empty(&proc->todo) || |
| 2073 | (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); |
| 2074 | } |
| 2075 | |
| 2076 | static int binder_has_thread_work(struct binder_thread *thread) |
| 2077 | { |
| 2078 | return !list_empty(&thread->todo) || thread->return_error != BR_OK || |
| 2079 | (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); |
| 2080 | } |
| 2081 | |
| 2082 | static int binder_thread_read(struct binder_proc *proc, |
| 2083 | struct binder_thread *thread, |
| 2084 | void __user *buffer, int size, |
| 2085 | signed long *consumed, int non_block) |
| 2086 | { |
| 2087 | void __user *ptr = buffer + *consumed; |
| 2088 | void __user *end = buffer + size; |
| 2089 | |
| 2090 | int ret = 0; |
| 2091 | int wait_for_proc_work; |
| 2092 | |
| 2093 | if (*consumed == 0) { |
| 2094 | if (put_user(BR_NOOP, (uint32_t __user *)ptr)) |
| 2095 | return -EFAULT; |
| 2096 | ptr += sizeof(uint32_t); |
| 2097 | } |
| 2098 | |
| 2099 | retry: |
| 2100 | wait_for_proc_work = thread->transaction_stack == NULL && |
| 2101 | list_empty(&thread->todo); |
| 2102 | |
| 2103 | if (thread->return_error != BR_OK && ptr < end) { |
| 2104 | if (thread->return_error2 != BR_OK) { |
| 2105 | if (put_user(thread->return_error2, (uint32_t __user *)ptr)) |
| 2106 | return -EFAULT; |
| 2107 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | 89334ab | 2012-10-16 15:29:52 -0700 | [diff] [blame] | 2108 | binder_stat_br(proc, thread, thread->return_error2); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2109 | if (ptr == end) |
| 2110 | goto done; |
| 2111 | thread->return_error2 = BR_OK; |
| 2112 | } |
| 2113 | if (put_user(thread->return_error, (uint32_t __user *)ptr)) |
| 2114 | return -EFAULT; |
| 2115 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | 89334ab | 2012-10-16 15:29:52 -0700 | [diff] [blame] | 2116 | binder_stat_br(proc, thread, thread->return_error); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2117 | thread->return_error = BR_OK; |
| 2118 | goto done; |
| 2119 | } |
| 2120 | |
| 2121 | |
| 2122 | thread->looper |= BINDER_LOOPER_STATE_WAITING; |
| 2123 | if (wait_for_proc_work) |
| 2124 | proc->ready_threads++; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2125 | |
| 2126 | binder_unlock(__func__); |
| 2127 | |
| 2128 | trace_binder_wait_for_work(wait_for_proc_work, |
| 2129 | !!thread->transaction_stack, |
| 2130 | !list_empty(&thread->todo)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2131 | if (wait_for_proc_work) { |
| 2132 | if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED | |
| 2133 | BINDER_LOOPER_STATE_ENTERED))) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2134 | binder_user_error("%d:%d ERROR: Thread waiting for process work before calling BC_REGISTER_LOOPER or BC_ENTER_LOOPER (state %x)\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2135 | proc->pid, thread->pid, thread->looper); |
| 2136 | wait_event_interruptible(binder_user_error_wait, |
| 2137 | binder_stop_on_user_error < 2); |
| 2138 | } |
| 2139 | binder_set_nice(proc->default_priority); |
| 2140 | if (non_block) { |
| 2141 | if (!binder_has_proc_work(proc, thread)) |
| 2142 | ret = -EAGAIN; |
| 2143 | } else |
Colin Cross | e2610b2 | 2013-05-06 23:50:15 +0000 | [diff] [blame^] | 2144 | ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2145 | } else { |
| 2146 | if (non_block) { |
| 2147 | if (!binder_has_thread_work(thread)) |
| 2148 | ret = -EAGAIN; |
| 2149 | } else |
Colin Cross | e2610b2 | 2013-05-06 23:50:15 +0000 | [diff] [blame^] | 2150 | ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2151 | } |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2152 | |
| 2153 | binder_lock(__func__); |
| 2154 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2155 | if (wait_for_proc_work) |
| 2156 | proc->ready_threads--; |
| 2157 | thread->looper &= ~BINDER_LOOPER_STATE_WAITING; |
| 2158 | |
| 2159 | if (ret) |
| 2160 | return ret; |
| 2161 | |
| 2162 | while (1) { |
| 2163 | uint32_t cmd; |
| 2164 | struct binder_transaction_data tr; |
| 2165 | struct binder_work *w; |
| 2166 | struct binder_transaction *t = NULL; |
| 2167 | |
| 2168 | if (!list_empty(&thread->todo)) |
| 2169 | w = list_first_entry(&thread->todo, struct binder_work, entry); |
| 2170 | else if (!list_empty(&proc->todo) && wait_for_proc_work) |
| 2171 | w = list_first_entry(&proc->todo, struct binder_work, entry); |
| 2172 | else { |
| 2173 | if (ptr - buffer == 4 && !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) /* no data added */ |
| 2174 | goto retry; |
| 2175 | break; |
| 2176 | } |
| 2177 | |
| 2178 | if (end - ptr < sizeof(tr) + 4) |
| 2179 | break; |
| 2180 | |
| 2181 | switch (w->type) { |
| 2182 | case BINDER_WORK_TRANSACTION: { |
| 2183 | t = container_of(w, struct binder_transaction, work); |
| 2184 | } break; |
| 2185 | case BINDER_WORK_TRANSACTION_COMPLETE: { |
| 2186 | cmd = BR_TRANSACTION_COMPLETE; |
| 2187 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2188 | return -EFAULT; |
| 2189 | ptr += sizeof(uint32_t); |
| 2190 | |
| 2191 | binder_stat_br(proc, thread, cmd); |
| 2192 | binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2193 | "%d:%d BR_TRANSACTION_COMPLETE\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2194 | proc->pid, thread->pid); |
| 2195 | |
| 2196 | list_del(&w->entry); |
| 2197 | kfree(w); |
| 2198 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 2199 | } break; |
| 2200 | case BINDER_WORK_NODE: { |
| 2201 | struct binder_node *node = container_of(w, struct binder_node, work); |
| 2202 | uint32_t cmd = BR_NOOP; |
| 2203 | const char *cmd_name; |
| 2204 | int strong = node->internal_strong_refs || node->local_strong_refs; |
| 2205 | int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong; |
| 2206 | if (weak && !node->has_weak_ref) { |
| 2207 | cmd = BR_INCREFS; |
| 2208 | cmd_name = "BR_INCREFS"; |
| 2209 | node->has_weak_ref = 1; |
| 2210 | node->pending_weak_ref = 1; |
| 2211 | node->local_weak_refs++; |
| 2212 | } else if (strong && !node->has_strong_ref) { |
| 2213 | cmd = BR_ACQUIRE; |
| 2214 | cmd_name = "BR_ACQUIRE"; |
| 2215 | node->has_strong_ref = 1; |
| 2216 | node->pending_strong_ref = 1; |
| 2217 | node->local_strong_refs++; |
| 2218 | } else if (!strong && node->has_strong_ref) { |
| 2219 | cmd = BR_RELEASE; |
| 2220 | cmd_name = "BR_RELEASE"; |
| 2221 | node->has_strong_ref = 0; |
| 2222 | } else if (!weak && node->has_weak_ref) { |
| 2223 | cmd = BR_DECREFS; |
| 2224 | cmd_name = "BR_DECREFS"; |
| 2225 | node->has_weak_ref = 0; |
| 2226 | } |
| 2227 | if (cmd != BR_NOOP) { |
| 2228 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2229 | return -EFAULT; |
| 2230 | ptr += sizeof(uint32_t); |
| 2231 | if (put_user(node->ptr, (void * __user *)ptr)) |
| 2232 | return -EFAULT; |
| 2233 | ptr += sizeof(void *); |
| 2234 | if (put_user(node->cookie, (void * __user *)ptr)) |
| 2235 | return -EFAULT; |
| 2236 | ptr += sizeof(void *); |
| 2237 | |
| 2238 | binder_stat_br(proc, thread, cmd); |
| 2239 | binder_debug(BINDER_DEBUG_USER_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2240 | "%d:%d %s %d u%p c%p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2241 | proc->pid, thread->pid, cmd_name, node->debug_id, node->ptr, node->cookie); |
| 2242 | } else { |
| 2243 | list_del_init(&w->entry); |
| 2244 | if (!weak && !strong) { |
| 2245 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2246 | "%d:%d node %d u%p c%p deleted\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2247 | proc->pid, thread->pid, node->debug_id, |
| 2248 | node->ptr, node->cookie); |
| 2249 | rb_erase(&node->rb_node, &proc->nodes); |
| 2250 | kfree(node); |
| 2251 | binder_stats_deleted(BINDER_STAT_NODE); |
| 2252 | } else { |
| 2253 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2254 | "%d:%d node %d u%p c%p state unchanged\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2255 | proc->pid, thread->pid, node->debug_id, node->ptr, |
| 2256 | node->cookie); |
| 2257 | } |
| 2258 | } |
| 2259 | } break; |
| 2260 | case BINDER_WORK_DEAD_BINDER: |
| 2261 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
| 2262 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { |
| 2263 | struct binder_ref_death *death; |
| 2264 | uint32_t cmd; |
| 2265 | |
| 2266 | death = container_of(w, struct binder_ref_death, work); |
| 2267 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) |
| 2268 | cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE; |
| 2269 | else |
| 2270 | cmd = BR_DEAD_BINDER; |
| 2271 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2272 | return -EFAULT; |
| 2273 | ptr += sizeof(uint32_t); |
| 2274 | if (put_user(death->cookie, (void * __user *)ptr)) |
| 2275 | return -EFAULT; |
| 2276 | ptr += sizeof(void *); |
Arve Hjønnevåg | 89334ab | 2012-10-16 15:29:52 -0700 | [diff] [blame] | 2277 | binder_stat_br(proc, thread, cmd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2278 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2279 | "%d:%d %s %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2280 | proc->pid, thread->pid, |
| 2281 | cmd == BR_DEAD_BINDER ? |
| 2282 | "BR_DEAD_BINDER" : |
| 2283 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", |
| 2284 | death->cookie); |
| 2285 | |
| 2286 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) { |
| 2287 | list_del(&w->entry); |
| 2288 | kfree(death); |
| 2289 | binder_stats_deleted(BINDER_STAT_DEATH); |
| 2290 | } else |
| 2291 | list_move(&w->entry, &proc->delivered_death); |
| 2292 | if (cmd == BR_DEAD_BINDER) |
| 2293 | goto done; /* DEAD_BINDER notifications can cause transactions */ |
| 2294 | } break; |
| 2295 | } |
| 2296 | |
| 2297 | if (!t) |
| 2298 | continue; |
| 2299 | |
| 2300 | BUG_ON(t->buffer == NULL); |
| 2301 | if (t->buffer->target_node) { |
| 2302 | struct binder_node *target_node = t->buffer->target_node; |
| 2303 | tr.target.ptr = target_node->ptr; |
| 2304 | tr.cookie = target_node->cookie; |
| 2305 | t->saved_priority = task_nice(current); |
| 2306 | if (t->priority < target_node->min_priority && |
| 2307 | !(t->flags & TF_ONE_WAY)) |
| 2308 | binder_set_nice(t->priority); |
| 2309 | else if (!(t->flags & TF_ONE_WAY) || |
| 2310 | t->saved_priority > target_node->min_priority) |
| 2311 | binder_set_nice(target_node->min_priority); |
| 2312 | cmd = BR_TRANSACTION; |
| 2313 | } else { |
| 2314 | tr.target.ptr = NULL; |
| 2315 | tr.cookie = NULL; |
| 2316 | cmd = BR_REPLY; |
| 2317 | } |
| 2318 | tr.code = t->code; |
| 2319 | tr.flags = t->flags; |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 2320 | tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2321 | |
| 2322 | if (t->from) { |
| 2323 | struct task_struct *sender = t->from->proc->tsk; |
| 2324 | tr.sender_pid = task_tgid_nr_ns(sender, |
Eric W. Biederman | 17cf22c | 2010-03-02 14:51:53 -0800 | [diff] [blame] | 2325 | task_active_pid_ns(current)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2326 | } else { |
| 2327 | tr.sender_pid = 0; |
| 2328 | } |
| 2329 | |
| 2330 | tr.data_size = t->buffer->data_size; |
| 2331 | tr.offsets_size = t->buffer->offsets_size; |
| 2332 | tr.data.ptr.buffer = (void *)t->buffer->data + |
| 2333 | proc->user_buffer_offset; |
| 2334 | tr.data.ptr.offsets = tr.data.ptr.buffer + |
| 2335 | ALIGN(t->buffer->data_size, |
| 2336 | sizeof(void *)); |
| 2337 | |
| 2338 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2339 | return -EFAULT; |
| 2340 | ptr += sizeof(uint32_t); |
| 2341 | if (copy_to_user(ptr, &tr, sizeof(tr))) |
| 2342 | return -EFAULT; |
| 2343 | ptr += sizeof(tr); |
| 2344 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2345 | trace_binder_transaction_received(t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2346 | binder_stat_br(proc, thread, cmd); |
| 2347 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2348 | "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %p-%p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2349 | proc->pid, thread->pid, |
| 2350 | (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" : |
| 2351 | "BR_REPLY", |
| 2352 | t->debug_id, t->from ? t->from->proc->pid : 0, |
| 2353 | t->from ? t->from->pid : 0, cmd, |
| 2354 | t->buffer->data_size, t->buffer->offsets_size, |
| 2355 | tr.data.ptr.buffer, tr.data.ptr.offsets); |
| 2356 | |
| 2357 | list_del(&t->work.entry); |
| 2358 | t->buffer->allow_user_free = 1; |
| 2359 | if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) { |
| 2360 | t->to_parent = thread->transaction_stack; |
| 2361 | t->to_thread = thread; |
| 2362 | thread->transaction_stack = t; |
| 2363 | } else { |
| 2364 | t->buffer->transaction = NULL; |
| 2365 | kfree(t); |
| 2366 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 2367 | } |
| 2368 | break; |
| 2369 | } |
| 2370 | |
| 2371 | done: |
| 2372 | |
| 2373 | *consumed = ptr - buffer; |
| 2374 | if (proc->requested_threads + proc->ready_threads == 0 && |
| 2375 | proc->requested_threads_started < proc->max_threads && |
| 2376 | (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | |
| 2377 | BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */ |
| 2378 | /*spawn a new thread if we leave this out */) { |
| 2379 | proc->requested_threads++; |
| 2380 | binder_debug(BINDER_DEBUG_THREADS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2381 | "%d:%d BR_SPAWN_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2382 | proc->pid, thread->pid); |
| 2383 | if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer)) |
| 2384 | return -EFAULT; |
Arve Hjønnevåg | 89334ab | 2012-10-16 15:29:52 -0700 | [diff] [blame] | 2385 | binder_stat_br(proc, thread, BR_SPAWN_LOOPER); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2386 | } |
| 2387 | return 0; |
| 2388 | } |
| 2389 | |
| 2390 | static void binder_release_work(struct list_head *list) |
| 2391 | { |
| 2392 | struct binder_work *w; |
| 2393 | while (!list_empty(list)) { |
| 2394 | w = list_first_entry(list, struct binder_work, entry); |
| 2395 | list_del_init(&w->entry); |
| 2396 | switch (w->type) { |
| 2397 | case BINDER_WORK_TRANSACTION: { |
| 2398 | struct binder_transaction *t; |
| 2399 | |
| 2400 | t = container_of(w, struct binder_transaction, work); |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2401 | if (t->buffer->target_node && |
| 2402 | !(t->flags & TF_ONE_WAY)) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2403 | binder_send_failed_reply(t, BR_DEAD_REPLY); |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2404 | } else { |
| 2405 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2406 | "undelivered transaction %d\n", |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2407 | t->debug_id); |
| 2408 | t->buffer->transaction = NULL; |
| 2409 | kfree(t); |
| 2410 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 2411 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2412 | } break; |
| 2413 | case BINDER_WORK_TRANSACTION_COMPLETE: { |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2414 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2415 | "undelivered TRANSACTION_COMPLETE\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2416 | kfree(w); |
| 2417 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 2418 | } break; |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2419 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
| 2420 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { |
| 2421 | struct binder_ref_death *death; |
| 2422 | |
| 2423 | death = container_of(w, struct binder_ref_death, work); |
| 2424 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2425 | "undelivered death notification, %p\n", |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2426 | death->cookie); |
| 2427 | kfree(death); |
| 2428 | binder_stats_deleted(BINDER_STAT_DEATH); |
| 2429 | } break; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2430 | default: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2431 | pr_err("unexpected work type, %d, not freed\n", |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2432 | w->type); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2433 | break; |
| 2434 | } |
| 2435 | } |
| 2436 | |
| 2437 | } |
| 2438 | |
| 2439 | static struct binder_thread *binder_get_thread(struct binder_proc *proc) |
| 2440 | { |
| 2441 | struct binder_thread *thread = NULL; |
| 2442 | struct rb_node *parent = NULL; |
| 2443 | struct rb_node **p = &proc->threads.rb_node; |
| 2444 | |
| 2445 | while (*p) { |
| 2446 | parent = *p; |
| 2447 | thread = rb_entry(parent, struct binder_thread, rb_node); |
| 2448 | |
| 2449 | if (current->pid < thread->pid) |
| 2450 | p = &(*p)->rb_left; |
| 2451 | else if (current->pid > thread->pid) |
| 2452 | p = &(*p)->rb_right; |
| 2453 | else |
| 2454 | break; |
| 2455 | } |
| 2456 | if (*p == NULL) { |
| 2457 | thread = kzalloc(sizeof(*thread), GFP_KERNEL); |
| 2458 | if (thread == NULL) |
| 2459 | return NULL; |
| 2460 | binder_stats_created(BINDER_STAT_THREAD); |
| 2461 | thread->proc = proc; |
| 2462 | thread->pid = current->pid; |
| 2463 | init_waitqueue_head(&thread->wait); |
| 2464 | INIT_LIST_HEAD(&thread->todo); |
| 2465 | rb_link_node(&thread->rb_node, parent, p); |
| 2466 | rb_insert_color(&thread->rb_node, &proc->threads); |
| 2467 | thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; |
| 2468 | thread->return_error = BR_OK; |
| 2469 | thread->return_error2 = BR_OK; |
| 2470 | } |
| 2471 | return thread; |
| 2472 | } |
| 2473 | |
| 2474 | static int binder_free_thread(struct binder_proc *proc, |
| 2475 | struct binder_thread *thread) |
| 2476 | { |
| 2477 | struct binder_transaction *t; |
| 2478 | struct binder_transaction *send_reply = NULL; |
| 2479 | int active_transactions = 0; |
| 2480 | |
| 2481 | rb_erase(&thread->rb_node, &proc->threads); |
| 2482 | t = thread->transaction_stack; |
| 2483 | if (t && t->to_thread == thread) |
| 2484 | send_reply = t; |
| 2485 | while (t) { |
| 2486 | active_transactions++; |
| 2487 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2488 | "release %d:%d transaction %d %s, still active\n", |
| 2489 | proc->pid, thread->pid, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2490 | t->debug_id, |
| 2491 | (t->to_thread == thread) ? "in" : "out"); |
| 2492 | |
| 2493 | if (t->to_thread == thread) { |
| 2494 | t->to_proc = NULL; |
| 2495 | t->to_thread = NULL; |
| 2496 | if (t->buffer) { |
| 2497 | t->buffer->transaction = NULL; |
| 2498 | t->buffer = NULL; |
| 2499 | } |
| 2500 | t = t->to_parent; |
| 2501 | } else if (t->from == thread) { |
| 2502 | t->from = NULL; |
| 2503 | t = t->from_parent; |
| 2504 | } else |
| 2505 | BUG(); |
| 2506 | } |
| 2507 | if (send_reply) |
| 2508 | binder_send_failed_reply(send_reply, BR_DEAD_REPLY); |
| 2509 | binder_release_work(&thread->todo); |
| 2510 | kfree(thread); |
| 2511 | binder_stats_deleted(BINDER_STAT_THREAD); |
| 2512 | return active_transactions; |
| 2513 | } |
| 2514 | |
| 2515 | static unsigned int binder_poll(struct file *filp, |
| 2516 | struct poll_table_struct *wait) |
| 2517 | { |
| 2518 | struct binder_proc *proc = filp->private_data; |
| 2519 | struct binder_thread *thread = NULL; |
| 2520 | int wait_for_proc_work; |
| 2521 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2522 | binder_lock(__func__); |
| 2523 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2524 | thread = binder_get_thread(proc); |
| 2525 | |
| 2526 | wait_for_proc_work = thread->transaction_stack == NULL && |
| 2527 | list_empty(&thread->todo) && thread->return_error == BR_OK; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2528 | |
| 2529 | binder_unlock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2530 | |
| 2531 | if (wait_for_proc_work) { |
| 2532 | if (binder_has_proc_work(proc, thread)) |
| 2533 | return POLLIN; |
| 2534 | poll_wait(filp, &proc->wait, wait); |
| 2535 | if (binder_has_proc_work(proc, thread)) |
| 2536 | return POLLIN; |
| 2537 | } else { |
| 2538 | if (binder_has_thread_work(thread)) |
| 2539 | return POLLIN; |
| 2540 | poll_wait(filp, &thread->wait, wait); |
| 2541 | if (binder_has_thread_work(thread)) |
| 2542 | return POLLIN; |
| 2543 | } |
| 2544 | return 0; |
| 2545 | } |
| 2546 | |
| 2547 | static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 2548 | { |
| 2549 | int ret; |
| 2550 | struct binder_proc *proc = filp->private_data; |
| 2551 | struct binder_thread *thread; |
| 2552 | unsigned int size = _IOC_SIZE(cmd); |
| 2553 | void __user *ubuf = (void __user *)arg; |
| 2554 | |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2555 | /*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] | 2556 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2557 | trace_binder_ioctl(cmd, arg); |
| 2558 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2559 | ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
| 2560 | if (ret) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2561 | goto err_unlocked; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2562 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2563 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2564 | thread = binder_get_thread(proc); |
| 2565 | if (thread == NULL) { |
| 2566 | ret = -ENOMEM; |
| 2567 | goto err; |
| 2568 | } |
| 2569 | |
| 2570 | switch (cmd) { |
| 2571 | case BINDER_WRITE_READ: { |
| 2572 | struct binder_write_read bwr; |
| 2573 | if (size != sizeof(struct binder_write_read)) { |
| 2574 | ret = -EINVAL; |
| 2575 | goto err; |
| 2576 | } |
| 2577 | if (copy_from_user(&bwr, ubuf, sizeof(bwr))) { |
| 2578 | ret = -EFAULT; |
| 2579 | goto err; |
| 2580 | } |
| 2581 | binder_debug(BINDER_DEBUG_READ_WRITE, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2582 | "%d:%d write %ld at %08lx, read %ld at %08lx\n", |
| 2583 | proc->pid, thread->pid, bwr.write_size, |
| 2584 | bwr.write_buffer, bwr.read_size, bwr.read_buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2585 | |
| 2586 | if (bwr.write_size > 0) { |
| 2587 | ret = binder_thread_write(proc, thread, (void __user *)bwr.write_buffer, bwr.write_size, &bwr.write_consumed); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2588 | trace_binder_write_done(ret); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2589 | if (ret < 0) { |
| 2590 | bwr.read_consumed = 0; |
| 2591 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) |
| 2592 | ret = -EFAULT; |
| 2593 | goto err; |
| 2594 | } |
| 2595 | } |
| 2596 | if (bwr.read_size > 0) { |
| 2597 | ret = binder_thread_read(proc, thread, (void __user *)bwr.read_buffer, bwr.read_size, &bwr.read_consumed, filp->f_flags & O_NONBLOCK); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2598 | trace_binder_read_done(ret); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2599 | if (!list_empty(&proc->todo)) |
| 2600 | wake_up_interruptible(&proc->wait); |
| 2601 | if (ret < 0) { |
| 2602 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) |
| 2603 | ret = -EFAULT; |
| 2604 | goto err; |
| 2605 | } |
| 2606 | } |
| 2607 | binder_debug(BINDER_DEBUG_READ_WRITE, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2608 | "%d:%d wrote %ld of %ld, read return %ld of %ld\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2609 | proc->pid, thread->pid, bwr.write_consumed, bwr.write_size, |
| 2610 | bwr.read_consumed, bwr.read_size); |
| 2611 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) { |
| 2612 | ret = -EFAULT; |
| 2613 | goto err; |
| 2614 | } |
| 2615 | break; |
| 2616 | } |
| 2617 | case BINDER_SET_MAX_THREADS: |
| 2618 | if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) { |
| 2619 | ret = -EINVAL; |
| 2620 | goto err; |
| 2621 | } |
| 2622 | break; |
| 2623 | case BINDER_SET_CONTEXT_MGR: |
| 2624 | if (binder_context_mgr_node != NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2625 | pr_err("BINDER_SET_CONTEXT_MGR already set\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2626 | ret = -EBUSY; |
| 2627 | goto err; |
| 2628 | } |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 2629 | if (uid_valid(binder_context_mgr_uid)) { |
| 2630 | if (!uid_eq(binder_context_mgr_uid, current->cred->euid)) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2631 | pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n", |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 2632 | from_kuid(&init_user_ns, current->cred->euid), |
| 2633 | from_kuid(&init_user_ns, binder_context_mgr_uid)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2634 | ret = -EPERM; |
| 2635 | goto err; |
| 2636 | } |
| 2637 | } else |
| 2638 | binder_context_mgr_uid = current->cred->euid; |
| 2639 | binder_context_mgr_node = binder_new_node(proc, NULL, NULL); |
| 2640 | if (binder_context_mgr_node == NULL) { |
| 2641 | ret = -ENOMEM; |
| 2642 | goto err; |
| 2643 | } |
| 2644 | binder_context_mgr_node->local_weak_refs++; |
| 2645 | binder_context_mgr_node->local_strong_refs++; |
| 2646 | binder_context_mgr_node->has_strong_ref = 1; |
| 2647 | binder_context_mgr_node->has_weak_ref = 1; |
| 2648 | break; |
| 2649 | case BINDER_THREAD_EXIT: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2650 | binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2651 | proc->pid, thread->pid); |
| 2652 | binder_free_thread(proc, thread); |
| 2653 | thread = NULL; |
| 2654 | break; |
| 2655 | case BINDER_VERSION: |
| 2656 | if (size != sizeof(struct binder_version)) { |
| 2657 | ret = -EINVAL; |
| 2658 | goto err; |
| 2659 | } |
| 2660 | if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, &((struct binder_version *)ubuf)->protocol_version)) { |
| 2661 | ret = -EINVAL; |
| 2662 | goto err; |
| 2663 | } |
| 2664 | break; |
| 2665 | default: |
| 2666 | ret = -EINVAL; |
| 2667 | goto err; |
| 2668 | } |
| 2669 | ret = 0; |
| 2670 | err: |
| 2671 | if (thread) |
| 2672 | thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2673 | binder_unlock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2674 | wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
| 2675 | if (ret && ret != -ERESTARTSYS) |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2676 | pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2677 | err_unlocked: |
| 2678 | trace_binder_ioctl_done(ret); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2679 | return ret; |
| 2680 | } |
| 2681 | |
| 2682 | static void binder_vma_open(struct vm_area_struct *vma) |
| 2683 | { |
| 2684 | struct binder_proc *proc = vma->vm_private_data; |
| 2685 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2686 | "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 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)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2690 | } |
| 2691 | |
| 2692 | static void binder_vma_close(struct vm_area_struct *vma) |
| 2693 | { |
| 2694 | struct binder_proc *proc = vma->vm_private_data; |
| 2695 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2696 | "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2697 | proc->pid, vma->vm_start, vma->vm_end, |
| 2698 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, |
| 2699 | (unsigned long)pgprot_val(vma->vm_page_prot)); |
| 2700 | proc->vma = NULL; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 2701 | proc->vma_vm_mm = NULL; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2702 | binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES); |
| 2703 | } |
| 2704 | |
| 2705 | static struct vm_operations_struct binder_vm_ops = { |
| 2706 | .open = binder_vma_open, |
| 2707 | .close = binder_vma_close, |
| 2708 | }; |
| 2709 | |
| 2710 | static int binder_mmap(struct file *filp, struct vm_area_struct *vma) |
| 2711 | { |
| 2712 | int ret; |
| 2713 | struct vm_struct *area; |
| 2714 | struct binder_proc *proc = filp->private_data; |
| 2715 | const char *failure_string; |
| 2716 | struct binder_buffer *buffer; |
| 2717 | |
Al Viro | a79f41e | 2012-08-15 18:23:36 -0400 | [diff] [blame] | 2718 | if (proc->tsk != current) |
| 2719 | return -EINVAL; |
| 2720 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2721 | if ((vma->vm_end - vma->vm_start) > SZ_4M) |
| 2722 | vma->vm_end = vma->vm_start + SZ_4M; |
| 2723 | |
| 2724 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 2725 | "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n", |
| 2726 | proc->pid, vma->vm_start, vma->vm_end, |
| 2727 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, |
| 2728 | (unsigned long)pgprot_val(vma->vm_page_prot)); |
| 2729 | |
| 2730 | if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) { |
| 2731 | ret = -EPERM; |
| 2732 | failure_string = "bad vm_flags"; |
| 2733 | goto err_bad_arg; |
| 2734 | } |
| 2735 | vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE; |
| 2736 | |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 2737 | mutex_lock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2738 | if (proc->buffer) { |
| 2739 | ret = -EBUSY; |
| 2740 | failure_string = "already mapped"; |
| 2741 | goto err_already_mapped; |
| 2742 | } |
| 2743 | |
| 2744 | area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP); |
| 2745 | if (area == NULL) { |
| 2746 | ret = -ENOMEM; |
| 2747 | failure_string = "get_vm_area"; |
| 2748 | goto err_get_vm_area_failed; |
| 2749 | } |
| 2750 | proc->buffer = area->addr; |
| 2751 | proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer; |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 2752 | mutex_unlock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2753 | |
| 2754 | #ifdef CONFIG_CPU_CACHE_VIPT |
| 2755 | if (cache_is_vipt_aliasing()) { |
| 2756 | while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2757 | 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] | 2758 | vma->vm_start += PAGE_SIZE; |
| 2759 | } |
| 2760 | } |
| 2761 | #endif |
| 2762 | proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL); |
| 2763 | if (proc->pages == NULL) { |
| 2764 | ret = -ENOMEM; |
| 2765 | failure_string = "alloc page array"; |
| 2766 | goto err_alloc_pages_failed; |
| 2767 | } |
| 2768 | proc->buffer_size = vma->vm_end - vma->vm_start; |
| 2769 | |
| 2770 | vma->vm_ops = &binder_vm_ops; |
| 2771 | vma->vm_private_data = proc; |
| 2772 | |
| 2773 | if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) { |
| 2774 | ret = -ENOMEM; |
| 2775 | failure_string = "alloc small buf"; |
| 2776 | goto err_alloc_small_buf_failed; |
| 2777 | } |
| 2778 | buffer = proc->buffer; |
| 2779 | INIT_LIST_HEAD(&proc->buffers); |
| 2780 | list_add(&buffer->entry, &proc->buffers); |
| 2781 | buffer->free = 1; |
| 2782 | binder_insert_free_buffer(proc, buffer); |
| 2783 | proc->free_async_space = proc->buffer_size / 2; |
| 2784 | barrier(); |
Al Viro | a79f41e | 2012-08-15 18:23:36 -0400 | [diff] [blame] | 2785 | proc->files = get_files_struct(current); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2786 | proc->vma = vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 2787 | proc->vma_vm_mm = vma->vm_mm; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2788 | |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2789 | /*pr_info("binder_mmap: %d %lx-%lx maps %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2790 | proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/ |
| 2791 | return 0; |
| 2792 | |
| 2793 | err_alloc_small_buf_failed: |
| 2794 | kfree(proc->pages); |
| 2795 | proc->pages = NULL; |
| 2796 | err_alloc_pages_failed: |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 2797 | mutex_lock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2798 | vfree(proc->buffer); |
| 2799 | proc->buffer = NULL; |
| 2800 | err_get_vm_area_failed: |
| 2801 | err_already_mapped: |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 2802 | mutex_unlock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2803 | err_bad_arg: |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 2804 | pr_err("binder_mmap: %d %lx-%lx %s failed %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2805 | proc->pid, vma->vm_start, vma->vm_end, failure_string, ret); |
| 2806 | return ret; |
| 2807 | } |
| 2808 | |
| 2809 | static int binder_open(struct inode *nodp, struct file *filp) |
| 2810 | { |
| 2811 | struct binder_proc *proc; |
| 2812 | |
| 2813 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n", |
| 2814 | current->group_leader->pid, current->pid); |
| 2815 | |
| 2816 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); |
| 2817 | if (proc == NULL) |
| 2818 | return -ENOMEM; |
| 2819 | get_task_struct(current); |
| 2820 | proc->tsk = current; |
| 2821 | INIT_LIST_HEAD(&proc->todo); |
| 2822 | init_waitqueue_head(&proc->wait); |
| 2823 | proc->default_priority = task_nice(current); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2824 | |
| 2825 | binder_lock(__func__); |
| 2826 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2827 | binder_stats_created(BINDER_STAT_PROC); |
| 2828 | hlist_add_head(&proc->proc_node, &binder_procs); |
| 2829 | proc->pid = current->group_leader->pid; |
| 2830 | INIT_LIST_HEAD(&proc->delivered_death); |
| 2831 | filp->private_data = proc; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2832 | |
| 2833 | binder_unlock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2834 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 2835 | if (binder_debugfs_dir_entry_proc) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2836 | char strbuf[11]; |
| 2837 | snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 2838 | proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO, |
| 2839 | binder_debugfs_dir_entry_proc, proc, &binder_proc_fops); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2840 | } |
| 2841 | |
| 2842 | return 0; |
| 2843 | } |
| 2844 | |
| 2845 | static int binder_flush(struct file *filp, fl_owner_t id) |
| 2846 | { |
| 2847 | struct binder_proc *proc = filp->private_data; |
| 2848 | |
| 2849 | binder_defer_work(proc, BINDER_DEFERRED_FLUSH); |
| 2850 | |
| 2851 | return 0; |
| 2852 | } |
| 2853 | |
| 2854 | static void binder_deferred_flush(struct binder_proc *proc) |
| 2855 | { |
| 2856 | struct rb_node *n; |
| 2857 | int wake_count = 0; |
| 2858 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) { |
| 2859 | struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); |
| 2860 | thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; |
| 2861 | if (thread->looper & BINDER_LOOPER_STATE_WAITING) { |
| 2862 | wake_up_interruptible(&thread->wait); |
| 2863 | wake_count++; |
| 2864 | } |
| 2865 | } |
| 2866 | wake_up_interruptible_all(&proc->wait); |
| 2867 | |
| 2868 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 2869 | "binder_flush: %d woke %d threads\n", proc->pid, |
| 2870 | wake_count); |
| 2871 | } |
| 2872 | |
| 2873 | static int binder_release(struct inode *nodp, struct file *filp) |
| 2874 | { |
| 2875 | struct binder_proc *proc = filp->private_data; |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 2876 | debugfs_remove(proc->debugfs_entry); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2877 | binder_defer_work(proc, BINDER_DEFERRED_RELEASE); |
| 2878 | |
| 2879 | return 0; |
| 2880 | } |
| 2881 | |
Mirsal Ennaime | 008fa74 | 2013-03-12 11:41:59 +0100 | [diff] [blame] | 2882 | static int binder_node_release(struct binder_node *node, int refs) |
| 2883 | { |
| 2884 | struct binder_ref *ref; |
| 2885 | int death = 0; |
| 2886 | |
| 2887 | list_del_init(&node->work.entry); |
| 2888 | binder_release_work(&node->async_todo); |
| 2889 | |
| 2890 | if (hlist_empty(&node->refs)) { |
| 2891 | kfree(node); |
| 2892 | binder_stats_deleted(BINDER_STAT_NODE); |
| 2893 | |
| 2894 | return refs; |
| 2895 | } |
| 2896 | |
| 2897 | node->proc = NULL; |
| 2898 | node->local_strong_refs = 0; |
| 2899 | node->local_weak_refs = 0; |
| 2900 | hlist_add_head(&node->dead_node, &binder_dead_nodes); |
| 2901 | |
| 2902 | hlist_for_each_entry(ref, &node->refs, node_entry) { |
| 2903 | refs++; |
| 2904 | |
| 2905 | if (!ref->death) |
| 2906 | goto out; |
| 2907 | |
| 2908 | death++; |
| 2909 | |
| 2910 | if (list_empty(&ref->death->work.entry)) { |
| 2911 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; |
| 2912 | list_add_tail(&ref->death->work.entry, |
| 2913 | &ref->proc->todo); |
| 2914 | wake_up_interruptible(&ref->proc->wait); |
| 2915 | } else |
| 2916 | BUG(); |
| 2917 | } |
| 2918 | |
| 2919 | out: |
| 2920 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 2921 | "node %d now dead, refs %d, death %d\n", |
| 2922 | node->debug_id, refs, death); |
| 2923 | |
| 2924 | return refs; |
| 2925 | } |
| 2926 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2927 | static void binder_deferred_release(struct binder_proc *proc) |
| 2928 | { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2929 | struct binder_transaction *t; |
| 2930 | struct rb_node *n; |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2931 | int threads, nodes, incoming_refs, outgoing_refs, buffers, |
| 2932 | active_transactions, page_count; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2933 | |
| 2934 | BUG_ON(proc->vma); |
| 2935 | BUG_ON(proc->files); |
| 2936 | |
| 2937 | hlist_del(&proc->proc_node); |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2938 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2939 | if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) { |
| 2940 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
Mirsal Ennaime | c07c933 | 2013-03-12 11:42:02 +0100 | [diff] [blame] | 2941 | "%s: %d context_mgr_node gone\n", |
| 2942 | __func__, proc->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2943 | binder_context_mgr_node = NULL; |
| 2944 | } |
| 2945 | |
| 2946 | threads = 0; |
| 2947 | active_transactions = 0; |
| 2948 | while ((n = rb_first(&proc->threads))) { |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2949 | struct binder_thread *thread; |
| 2950 | |
| 2951 | thread = rb_entry(n, struct binder_thread, rb_node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2952 | threads++; |
| 2953 | active_transactions += binder_free_thread(proc, thread); |
| 2954 | } |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2955 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2956 | nodes = 0; |
| 2957 | incoming_refs = 0; |
| 2958 | while ((n = rb_first(&proc->nodes))) { |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2959 | struct binder_node *node; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2960 | |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2961 | node = rb_entry(n, struct binder_node, rb_node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2962 | nodes++; |
| 2963 | rb_erase(&node->rb_node, &proc->nodes); |
Mirsal Ennaime | 008fa74 | 2013-03-12 11:41:59 +0100 | [diff] [blame] | 2964 | incoming_refs = binder_node_release(node, incoming_refs); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2965 | } |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2966 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2967 | outgoing_refs = 0; |
| 2968 | while ((n = rb_first(&proc->refs_by_desc))) { |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2969 | struct binder_ref *ref; |
| 2970 | |
| 2971 | ref = rb_entry(n, struct binder_ref, rb_node_desc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2972 | outgoing_refs++; |
| 2973 | binder_delete_ref(ref); |
| 2974 | } |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2975 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2976 | binder_release_work(&proc->todo); |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2977 | binder_release_work(&proc->delivered_death); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2978 | |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2979 | buffers = 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2980 | while ((n = rb_first(&proc->allocated_buffers))) { |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2981 | struct binder_buffer *buffer; |
| 2982 | |
| 2983 | buffer = rb_entry(n, struct binder_buffer, rb_node); |
| 2984 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2985 | t = buffer->transaction; |
| 2986 | if (t) { |
| 2987 | t->buffer = NULL; |
| 2988 | buffer->transaction = NULL; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2989 | pr_err("release proc %d, transaction %d, not freed\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2990 | proc->pid, t->debug_id); |
| 2991 | /*BUG();*/ |
| 2992 | } |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 2993 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2994 | binder_free_buf(proc, buffer); |
| 2995 | buffers++; |
| 2996 | } |
| 2997 | |
| 2998 | binder_stats_deleted(BINDER_STAT_PROC); |
| 2999 | |
| 3000 | page_count = 0; |
| 3001 | if (proc->pages) { |
| 3002 | int i; |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3003 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3004 | for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) { |
Mirsal Ennaime | ba97bc5 | 2013-03-12 11:42:01 +0100 | [diff] [blame] | 3005 | void *page_addr; |
| 3006 | |
| 3007 | if (!proc->pages[i]) |
| 3008 | continue; |
| 3009 | |
| 3010 | page_addr = proc->buffer + i * PAGE_SIZE; |
| 3011 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Mirsal Ennaime | c07c933 | 2013-03-12 11:42:02 +0100 | [diff] [blame] | 3012 | "%s: %d: page %d at %p not freed\n", |
| 3013 | __func__, proc->pid, i, page_addr); |
Mirsal Ennaime | ba97bc5 | 2013-03-12 11:42:01 +0100 | [diff] [blame] | 3014 | unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE); |
| 3015 | __free_page(proc->pages[i]); |
| 3016 | page_count++; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3017 | } |
| 3018 | kfree(proc->pages); |
| 3019 | vfree(proc->buffer); |
| 3020 | } |
| 3021 | |
| 3022 | put_task_struct(proc->tsk); |
| 3023 | |
| 3024 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
Mirsal Ennaime | c07c933 | 2013-03-12 11:42:02 +0100 | [diff] [blame] | 3025 | "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n", |
| 3026 | __func__, proc->pid, threads, nodes, incoming_refs, |
| 3027 | outgoing_refs, active_transactions, buffers, page_count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3028 | |
| 3029 | kfree(proc); |
| 3030 | } |
| 3031 | |
| 3032 | static void binder_deferred_func(struct work_struct *work) |
| 3033 | { |
| 3034 | struct binder_proc *proc; |
| 3035 | struct files_struct *files; |
| 3036 | |
| 3037 | int defer; |
| 3038 | do { |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3039 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3040 | mutex_lock(&binder_deferred_lock); |
| 3041 | if (!hlist_empty(&binder_deferred_list)) { |
| 3042 | proc = hlist_entry(binder_deferred_list.first, |
| 3043 | struct binder_proc, deferred_work_node); |
| 3044 | hlist_del_init(&proc->deferred_work_node); |
| 3045 | defer = proc->deferred_work; |
| 3046 | proc->deferred_work = 0; |
| 3047 | } else { |
| 3048 | proc = NULL; |
| 3049 | defer = 0; |
| 3050 | } |
| 3051 | mutex_unlock(&binder_deferred_lock); |
| 3052 | |
| 3053 | files = NULL; |
| 3054 | if (defer & BINDER_DEFERRED_PUT_FILES) { |
| 3055 | files = proc->files; |
| 3056 | if (files) |
| 3057 | proc->files = NULL; |
| 3058 | } |
| 3059 | |
| 3060 | if (defer & BINDER_DEFERRED_FLUSH) |
| 3061 | binder_deferred_flush(proc); |
| 3062 | |
| 3063 | if (defer & BINDER_DEFERRED_RELEASE) |
| 3064 | binder_deferred_release(proc); /* frees proc */ |
| 3065 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3066 | binder_unlock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3067 | if (files) |
| 3068 | put_files_struct(files); |
| 3069 | } while (proc); |
| 3070 | } |
| 3071 | static DECLARE_WORK(binder_deferred_work, binder_deferred_func); |
| 3072 | |
| 3073 | static void |
| 3074 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer) |
| 3075 | { |
| 3076 | mutex_lock(&binder_deferred_lock); |
| 3077 | proc->deferred_work |= defer; |
| 3078 | if (hlist_unhashed(&proc->deferred_work_node)) { |
| 3079 | hlist_add_head(&proc->deferred_work_node, |
| 3080 | &binder_deferred_list); |
Arve Hjønnevåg | 3c762a4 | 2010-04-22 15:53:23 -0700 | [diff] [blame] | 3081 | queue_work(binder_deferred_workqueue, &binder_deferred_work); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3082 | } |
| 3083 | mutex_unlock(&binder_deferred_lock); |
| 3084 | } |
| 3085 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3086 | static void print_binder_transaction(struct seq_file *m, const char *prefix, |
| 3087 | struct binder_transaction *t) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3088 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3089 | seq_printf(m, |
| 3090 | "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d", |
| 3091 | prefix, t->debug_id, t, |
| 3092 | t->from ? t->from->proc->pid : 0, |
| 3093 | t->from ? t->from->pid : 0, |
| 3094 | t->to_proc ? t->to_proc->pid : 0, |
| 3095 | t->to_thread ? t->to_thread->pid : 0, |
| 3096 | t->code, t->flags, t->priority, t->need_reply); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3097 | if (t->buffer == NULL) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3098 | seq_puts(m, " buffer free\n"); |
| 3099 | return; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3100 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3101 | if (t->buffer->target_node) |
| 3102 | seq_printf(m, " node %d", |
| 3103 | t->buffer->target_node->debug_id); |
| 3104 | seq_printf(m, " size %zd:%zd data %p\n", |
| 3105 | t->buffer->data_size, t->buffer->offsets_size, |
| 3106 | t->buffer->data); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3107 | } |
| 3108 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3109 | static void print_binder_buffer(struct seq_file *m, const char *prefix, |
| 3110 | struct binder_buffer *buffer) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3111 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3112 | seq_printf(m, "%s %d: %p size %zd:%zd %s\n", |
| 3113 | prefix, buffer->debug_id, buffer->data, |
| 3114 | buffer->data_size, buffer->offsets_size, |
| 3115 | buffer->transaction ? "active" : "delivered"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3116 | } |
| 3117 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3118 | static void print_binder_work(struct seq_file *m, const char *prefix, |
| 3119 | const char *transaction_prefix, |
| 3120 | struct binder_work *w) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3121 | { |
| 3122 | struct binder_node *node; |
| 3123 | struct binder_transaction *t; |
| 3124 | |
| 3125 | switch (w->type) { |
| 3126 | case BINDER_WORK_TRANSACTION: |
| 3127 | t = container_of(w, struct binder_transaction, work); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3128 | print_binder_transaction(m, transaction_prefix, t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3129 | break; |
| 3130 | case BINDER_WORK_TRANSACTION_COMPLETE: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3131 | seq_printf(m, "%stransaction complete\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3132 | break; |
| 3133 | case BINDER_WORK_NODE: |
| 3134 | node = container_of(w, struct binder_node, work); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3135 | seq_printf(m, "%snode work %d: u%p c%p\n", |
| 3136 | prefix, node->debug_id, node->ptr, node->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3137 | break; |
| 3138 | case BINDER_WORK_DEAD_BINDER: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3139 | seq_printf(m, "%shas dead binder\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3140 | break; |
| 3141 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3142 | seq_printf(m, "%shas cleared dead binder\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3143 | break; |
| 3144 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3145 | seq_printf(m, "%shas cleared death notification\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3146 | break; |
| 3147 | default: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3148 | seq_printf(m, "%sunknown work: type %d\n", prefix, w->type); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3149 | break; |
| 3150 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3151 | } |
| 3152 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3153 | static void print_binder_thread(struct seq_file *m, |
| 3154 | struct binder_thread *thread, |
| 3155 | int print_always) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3156 | { |
| 3157 | struct binder_transaction *t; |
| 3158 | struct binder_work *w; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3159 | size_t start_pos = m->count; |
| 3160 | size_t header_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3161 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3162 | seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper); |
| 3163 | header_pos = m->count; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3164 | t = thread->transaction_stack; |
| 3165 | while (t) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3166 | if (t->from == thread) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3167 | print_binder_transaction(m, |
| 3168 | " outgoing transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3169 | t = t->from_parent; |
| 3170 | } else if (t->to_thread == thread) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3171 | print_binder_transaction(m, |
| 3172 | " incoming transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3173 | t = t->to_parent; |
| 3174 | } else { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3175 | print_binder_transaction(m, " bad transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3176 | t = NULL; |
| 3177 | } |
| 3178 | } |
| 3179 | list_for_each_entry(w, &thread->todo, entry) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3180 | print_binder_work(m, " ", " pending transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3181 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3182 | if (!print_always && m->count == header_pos) |
| 3183 | m->count = start_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3184 | } |
| 3185 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3186 | 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] | 3187 | { |
| 3188 | struct binder_ref *ref; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3189 | struct binder_work *w; |
| 3190 | int count; |
| 3191 | |
| 3192 | count = 0; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3193 | hlist_for_each_entry(ref, &node->refs, node_entry) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3194 | count++; |
| 3195 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3196 | seq_printf(m, " node %d: u%p c%p hs %d hw %d ls %d lw %d is %d iw %d", |
| 3197 | node->debug_id, node->ptr, node->cookie, |
| 3198 | node->has_strong_ref, node->has_weak_ref, |
| 3199 | node->local_strong_refs, node->local_weak_refs, |
| 3200 | node->internal_strong_refs, count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3201 | if (count) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3202 | seq_puts(m, " proc"); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3203 | hlist_for_each_entry(ref, &node->refs, node_entry) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3204 | seq_printf(m, " %d", ref->proc->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3205 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3206 | seq_puts(m, "\n"); |
| 3207 | list_for_each_entry(w, &node->async_todo, entry) |
| 3208 | print_binder_work(m, " ", |
| 3209 | " pending async transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3210 | } |
| 3211 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3212 | 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] | 3213 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3214 | seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n", |
| 3215 | ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ", |
| 3216 | ref->node->debug_id, ref->strong, ref->weak, ref->death); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3217 | } |
| 3218 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3219 | static void print_binder_proc(struct seq_file *m, |
| 3220 | struct binder_proc *proc, int print_all) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3221 | { |
| 3222 | struct binder_work *w; |
| 3223 | struct rb_node *n; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3224 | size_t start_pos = m->count; |
| 3225 | size_t header_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3226 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3227 | seq_printf(m, "proc %d\n", proc->pid); |
| 3228 | header_pos = m->count; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3229 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3230 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) |
| 3231 | print_binder_thread(m, rb_entry(n, struct binder_thread, |
| 3232 | rb_node), print_all); |
| 3233 | 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] | 3234 | struct binder_node *node = rb_entry(n, struct binder_node, |
| 3235 | rb_node); |
| 3236 | if (print_all || node->has_async_transaction) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3237 | print_binder_node(m, node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3238 | } |
| 3239 | if (print_all) { |
| 3240 | for (n = rb_first(&proc->refs_by_desc); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3241 | n != NULL; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3242 | n = rb_next(n)) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3243 | print_binder_ref(m, rb_entry(n, struct binder_ref, |
| 3244 | rb_node_desc)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3245 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3246 | for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) |
| 3247 | print_binder_buffer(m, " buffer", |
| 3248 | rb_entry(n, struct binder_buffer, rb_node)); |
| 3249 | list_for_each_entry(w, &proc->todo, entry) |
| 3250 | print_binder_work(m, " ", " pending transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3251 | list_for_each_entry(w, &proc->delivered_death, entry) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3252 | seq_puts(m, " has delivered dead binder\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3253 | break; |
| 3254 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3255 | if (!print_all && m->count == header_pos) |
| 3256 | m->count = start_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3257 | } |
| 3258 | |
Cruz Julian Bishop | 167bccb | 2012-12-22 09:00:45 +1000 | [diff] [blame] | 3259 | static const char * const binder_return_strings[] = { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3260 | "BR_ERROR", |
| 3261 | "BR_OK", |
| 3262 | "BR_TRANSACTION", |
| 3263 | "BR_REPLY", |
| 3264 | "BR_ACQUIRE_RESULT", |
| 3265 | "BR_DEAD_REPLY", |
| 3266 | "BR_TRANSACTION_COMPLETE", |
| 3267 | "BR_INCREFS", |
| 3268 | "BR_ACQUIRE", |
| 3269 | "BR_RELEASE", |
| 3270 | "BR_DECREFS", |
| 3271 | "BR_ATTEMPT_ACQUIRE", |
| 3272 | "BR_NOOP", |
| 3273 | "BR_SPAWN_LOOPER", |
| 3274 | "BR_FINISHED", |
| 3275 | "BR_DEAD_BINDER", |
| 3276 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", |
| 3277 | "BR_FAILED_REPLY" |
| 3278 | }; |
| 3279 | |
Cruz Julian Bishop | 167bccb | 2012-12-22 09:00:45 +1000 | [diff] [blame] | 3280 | static const char * const binder_command_strings[] = { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3281 | "BC_TRANSACTION", |
| 3282 | "BC_REPLY", |
| 3283 | "BC_ACQUIRE_RESULT", |
| 3284 | "BC_FREE_BUFFER", |
| 3285 | "BC_INCREFS", |
| 3286 | "BC_ACQUIRE", |
| 3287 | "BC_RELEASE", |
| 3288 | "BC_DECREFS", |
| 3289 | "BC_INCREFS_DONE", |
| 3290 | "BC_ACQUIRE_DONE", |
| 3291 | "BC_ATTEMPT_ACQUIRE", |
| 3292 | "BC_REGISTER_LOOPER", |
| 3293 | "BC_ENTER_LOOPER", |
| 3294 | "BC_EXIT_LOOPER", |
| 3295 | "BC_REQUEST_DEATH_NOTIFICATION", |
| 3296 | "BC_CLEAR_DEATH_NOTIFICATION", |
| 3297 | "BC_DEAD_BINDER_DONE" |
| 3298 | }; |
| 3299 | |
Cruz Julian Bishop | 167bccb | 2012-12-22 09:00:45 +1000 | [diff] [blame] | 3300 | static const char * const binder_objstat_strings[] = { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3301 | "proc", |
| 3302 | "thread", |
| 3303 | "node", |
| 3304 | "ref", |
| 3305 | "death", |
| 3306 | "transaction", |
| 3307 | "transaction_complete" |
| 3308 | }; |
| 3309 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3310 | static void print_binder_stats(struct seq_file *m, const char *prefix, |
| 3311 | struct binder_stats *stats) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3312 | { |
| 3313 | int i; |
| 3314 | |
| 3315 | BUILD_BUG_ON(ARRAY_SIZE(stats->bc) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3316 | ARRAY_SIZE(binder_command_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3317 | for (i = 0; i < ARRAY_SIZE(stats->bc); i++) { |
| 3318 | if (stats->bc[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3319 | seq_printf(m, "%s%s: %d\n", prefix, |
| 3320 | binder_command_strings[i], stats->bc[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3321 | } |
| 3322 | |
| 3323 | BUILD_BUG_ON(ARRAY_SIZE(stats->br) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3324 | ARRAY_SIZE(binder_return_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3325 | for (i = 0; i < ARRAY_SIZE(stats->br); i++) { |
| 3326 | if (stats->br[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3327 | seq_printf(m, "%s%s: %d\n", prefix, |
| 3328 | binder_return_strings[i], stats->br[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3329 | } |
| 3330 | |
| 3331 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3332 | ARRAY_SIZE(binder_objstat_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3333 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3334 | ARRAY_SIZE(stats->obj_deleted)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3335 | for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) { |
| 3336 | if (stats->obj_created[i] || stats->obj_deleted[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3337 | seq_printf(m, "%s%s: active %d total %d\n", prefix, |
| 3338 | binder_objstat_strings[i], |
| 3339 | stats->obj_created[i] - stats->obj_deleted[i], |
| 3340 | stats->obj_created[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3341 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3342 | } |
| 3343 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3344 | static void print_binder_proc_stats(struct seq_file *m, |
| 3345 | struct binder_proc *proc) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3346 | { |
| 3347 | struct binder_work *w; |
| 3348 | struct rb_node *n; |
| 3349 | int count, strong, weak; |
| 3350 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3351 | seq_printf(m, "proc %d\n", proc->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3352 | count = 0; |
| 3353 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) |
| 3354 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3355 | seq_printf(m, " threads: %d\n", count); |
| 3356 | seq_printf(m, " requested threads: %d+%d/%d\n" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3357 | " ready threads %d\n" |
| 3358 | " free async space %zd\n", proc->requested_threads, |
| 3359 | proc->requested_threads_started, proc->max_threads, |
| 3360 | proc->ready_threads, proc->free_async_space); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3361 | count = 0; |
| 3362 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) |
| 3363 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3364 | seq_printf(m, " nodes: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3365 | count = 0; |
| 3366 | strong = 0; |
| 3367 | weak = 0; |
| 3368 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
| 3369 | struct binder_ref *ref = rb_entry(n, struct binder_ref, |
| 3370 | rb_node_desc); |
| 3371 | count++; |
| 3372 | strong += ref->strong; |
| 3373 | weak += ref->weak; |
| 3374 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3375 | 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] | 3376 | |
| 3377 | count = 0; |
| 3378 | for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) |
| 3379 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3380 | seq_printf(m, " buffers: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3381 | |
| 3382 | count = 0; |
| 3383 | list_for_each_entry(w, &proc->todo, entry) { |
| 3384 | switch (w->type) { |
| 3385 | case BINDER_WORK_TRANSACTION: |
| 3386 | count++; |
| 3387 | break; |
| 3388 | default: |
| 3389 | break; |
| 3390 | } |
| 3391 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3392 | seq_printf(m, " pending transactions: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3393 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3394 | print_binder_stats(m, " ", &proc->stats); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3395 | } |
| 3396 | |
| 3397 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3398 | static int binder_state_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3399 | { |
| 3400 | struct binder_proc *proc; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3401 | struct binder_node *node; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3402 | int do_lock = !binder_debug_no_lock; |
| 3403 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3404 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3405 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3406 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3407 | seq_puts(m, "binder state:\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3408 | |
| 3409 | if (!hlist_empty(&binder_dead_nodes)) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3410 | seq_puts(m, "dead nodes:\n"); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3411 | hlist_for_each_entry(node, &binder_dead_nodes, dead_node) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3412 | print_binder_node(m, node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3413 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3414 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3415 | print_binder_proc(m, proc, 1); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3416 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3417 | binder_unlock(__func__); |
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_stats_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3422 | { |
| 3423 | struct binder_proc *proc; |
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) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3427 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3428 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3429 | seq_puts(m, "binder stats:\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3430 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3431 | print_binder_stats(m, "", &binder_stats); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3432 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3433 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3434 | print_binder_proc_stats(m, proc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3435 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3436 | binder_unlock(__func__); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3437 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3438 | } |
| 3439 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3440 | static int binder_transactions_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3441 | { |
| 3442 | struct binder_proc *proc; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3443 | int do_lock = !binder_debug_no_lock; |
| 3444 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3445 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3446 | binder_lock(__func__); |
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 | seq_puts(m, "binder transactions:\n"); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3449 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3450 | print_binder_proc(m, proc, 0); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3451 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3452 | binder_unlock(__func__); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3453 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3454 | } |
| 3455 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3456 | static int binder_proc_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3457 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3458 | struct binder_proc *proc = m->private; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3459 | int do_lock = !binder_debug_no_lock; |
| 3460 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3461 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3462 | binder_lock(__func__); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3463 | seq_puts(m, "binder proc state:\n"); |
| 3464 | print_binder_proc(m, proc, 1); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3465 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3466 | binder_unlock(__func__); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3467 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3468 | } |
| 3469 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3470 | static void print_binder_transaction_log_entry(struct seq_file *m, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3471 | struct binder_transaction_log_entry *e) |
| 3472 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3473 | seq_printf(m, |
| 3474 | "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n", |
| 3475 | e->debug_id, (e->call_type == 2) ? "reply" : |
| 3476 | ((e->call_type == 1) ? "async" : "call "), e->from_proc, |
| 3477 | e->from_thread, e->to_proc, e->to_thread, e->to_node, |
| 3478 | e->target_handle, e->data_size, e->offsets_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3479 | } |
| 3480 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3481 | 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] | 3482 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3483 | struct binder_transaction_log *log = m->private; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3484 | int i; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3485 | |
| 3486 | if (log->full) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3487 | for (i = log->next; i < ARRAY_SIZE(log->entry); i++) |
| 3488 | print_binder_transaction_log_entry(m, &log->entry[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3489 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3490 | for (i = 0; i < log->next; i++) |
| 3491 | print_binder_transaction_log_entry(m, &log->entry[i]); |
| 3492 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3493 | } |
| 3494 | |
| 3495 | static const struct file_operations binder_fops = { |
| 3496 | .owner = THIS_MODULE, |
| 3497 | .poll = binder_poll, |
| 3498 | .unlocked_ioctl = binder_ioctl, |
| 3499 | .mmap = binder_mmap, |
| 3500 | .open = binder_open, |
| 3501 | .flush = binder_flush, |
| 3502 | .release = binder_release, |
| 3503 | }; |
| 3504 | |
| 3505 | static struct miscdevice binder_miscdev = { |
| 3506 | .minor = MISC_DYNAMIC_MINOR, |
| 3507 | .name = "binder", |
| 3508 | .fops = &binder_fops |
| 3509 | }; |
| 3510 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3511 | BINDER_DEBUG_ENTRY(state); |
| 3512 | BINDER_DEBUG_ENTRY(stats); |
| 3513 | BINDER_DEBUG_ENTRY(transactions); |
| 3514 | BINDER_DEBUG_ENTRY(transaction_log); |
| 3515 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3516 | static int __init binder_init(void) |
| 3517 | { |
| 3518 | int ret; |
| 3519 | |
Arve Hjønnevåg | 3c762a4 | 2010-04-22 15:53:23 -0700 | [diff] [blame] | 3520 | binder_deferred_workqueue = create_singlethread_workqueue("binder"); |
| 3521 | if (!binder_deferred_workqueue) |
| 3522 | return -ENOMEM; |
| 3523 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3524 | binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL); |
| 3525 | if (binder_debugfs_dir_entry_root) |
| 3526 | binder_debugfs_dir_entry_proc = debugfs_create_dir("proc", |
| 3527 | binder_debugfs_dir_entry_root); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3528 | ret = misc_register(&binder_miscdev); |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3529 | if (binder_debugfs_dir_entry_root) { |
| 3530 | debugfs_create_file("state", |
| 3531 | S_IRUGO, |
| 3532 | binder_debugfs_dir_entry_root, |
| 3533 | NULL, |
| 3534 | &binder_state_fops); |
| 3535 | debugfs_create_file("stats", |
| 3536 | S_IRUGO, |
| 3537 | binder_debugfs_dir_entry_root, |
| 3538 | NULL, |
| 3539 | &binder_stats_fops); |
| 3540 | debugfs_create_file("transactions", |
| 3541 | S_IRUGO, |
| 3542 | binder_debugfs_dir_entry_root, |
| 3543 | NULL, |
| 3544 | &binder_transactions_fops); |
| 3545 | debugfs_create_file("transaction_log", |
| 3546 | S_IRUGO, |
| 3547 | binder_debugfs_dir_entry_root, |
| 3548 | &binder_transaction_log, |
| 3549 | &binder_transaction_log_fops); |
| 3550 | debugfs_create_file("failed_transaction_log", |
| 3551 | S_IRUGO, |
| 3552 | binder_debugfs_dir_entry_root, |
| 3553 | &binder_transaction_log_failed, |
| 3554 | &binder_transaction_log_fops); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3555 | } |
| 3556 | return ret; |
| 3557 | } |
| 3558 | |
| 3559 | device_initcall(binder_init); |
| 3560 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3561 | #define CREATE_TRACE_POINTS |
| 3562 | #include "binder_trace.h" |
| 3563 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3564 | MODULE_LICENSE("GPL v2"); |