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> |
Stephen Smalley | 79af730 | 2015-01-21 10:54:10 -0500 | [diff] [blame] | 40 | #include <linux/security.h> |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 41 | |
Greg Kroah-Hartman | 9246a4a | 2014-10-16 15:26:51 +0200 | [diff] [blame] | 42 | #ifdef CONFIG_ANDROID_BINDER_IPC_32BIT |
| 43 | #define BINDER_IPC_32BIT 1 |
| 44 | #endif |
| 45 | |
| 46 | #include <uapi/linux/android/binder.h> |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 47 | #include "binder_trace.h" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 48 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 49 | static DEFINE_MUTEX(binder_main_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 50 | static DEFINE_MUTEX(binder_deferred_lock); |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 51 | static DEFINE_MUTEX(binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 52 | |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 53 | static HLIST_HEAD(binder_devices); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 54 | static HLIST_HEAD(binder_procs); |
| 55 | static HLIST_HEAD(binder_deferred_list); |
| 56 | static HLIST_HEAD(binder_dead_nodes); |
| 57 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 58 | static struct dentry *binder_debugfs_dir_entry_root; |
| 59 | static struct dentry *binder_debugfs_dir_entry_proc; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 60 | static int binder_last_id; |
| 61 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 62 | #define BINDER_DEBUG_ENTRY(name) \ |
| 63 | static int binder_##name##_open(struct inode *inode, struct file *file) \ |
| 64 | { \ |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 65 | return single_open(file, binder_##name##_show, inode->i_private); \ |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 66 | } \ |
| 67 | \ |
| 68 | static const struct file_operations binder_##name##_fops = { \ |
| 69 | .owner = THIS_MODULE, \ |
| 70 | .open = binder_##name##_open, \ |
| 71 | .read = seq_read, \ |
| 72 | .llseek = seq_lseek, \ |
| 73 | .release = single_release, \ |
| 74 | } |
| 75 | |
| 76 | static int binder_proc_show(struct seq_file *m, void *unused); |
| 77 | BINDER_DEBUG_ENTRY(proc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 78 | |
| 79 | /* This is only defined in include/asm-arm/sizes.h */ |
| 80 | #ifndef SZ_1K |
| 81 | #define SZ_1K 0x400 |
| 82 | #endif |
| 83 | |
| 84 | #ifndef SZ_4M |
| 85 | #define SZ_4M 0x400000 |
| 86 | #endif |
| 87 | |
| 88 | #define FORBIDDEN_MMAP_FLAGS (VM_WRITE) |
| 89 | |
| 90 | #define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64) |
| 91 | |
| 92 | enum { |
| 93 | BINDER_DEBUG_USER_ERROR = 1U << 0, |
| 94 | BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1, |
| 95 | BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2, |
| 96 | BINDER_DEBUG_OPEN_CLOSE = 1U << 3, |
| 97 | BINDER_DEBUG_DEAD_BINDER = 1U << 4, |
| 98 | BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5, |
| 99 | BINDER_DEBUG_READ_WRITE = 1U << 6, |
| 100 | BINDER_DEBUG_USER_REFS = 1U << 7, |
| 101 | BINDER_DEBUG_THREADS = 1U << 8, |
| 102 | BINDER_DEBUG_TRANSACTION = 1U << 9, |
| 103 | BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10, |
| 104 | BINDER_DEBUG_FREE_BUFFER = 1U << 11, |
| 105 | BINDER_DEBUG_INTERNAL_REFS = 1U << 12, |
| 106 | BINDER_DEBUG_BUFFER_ALLOC = 1U << 13, |
| 107 | BINDER_DEBUG_PRIORITY_CAP = 1U << 14, |
| 108 | BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15, |
| 109 | }; |
| 110 | static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR | |
| 111 | BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION; |
| 112 | module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO); |
| 113 | |
Zhengwang Ruan | 2c52325 | 2012-03-07 10:36:57 +0800 | [diff] [blame] | 114 | static bool binder_debug_no_lock; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 115 | module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO); |
| 116 | |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 117 | static char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES; |
| 118 | module_param_named(devices, binder_devices_param, charp, S_IRUGO); |
| 119 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 120 | static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait); |
| 121 | static int binder_stop_on_user_error; |
| 122 | |
| 123 | static int binder_set_stop_on_user_error(const char *val, |
| 124 | struct kernel_param *kp) |
| 125 | { |
| 126 | int ret; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 127 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 128 | ret = param_set_int(val, kp); |
| 129 | if (binder_stop_on_user_error < 2) |
| 130 | wake_up(&binder_user_error_wait); |
| 131 | return ret; |
| 132 | } |
| 133 | module_param_call(stop_on_user_error, binder_set_stop_on_user_error, |
| 134 | param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO); |
| 135 | |
| 136 | #define binder_debug(mask, x...) \ |
| 137 | do { \ |
| 138 | if (binder_debug_mask & mask) \ |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 139 | pr_info(x); \ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 140 | } while (0) |
| 141 | |
| 142 | #define binder_user_error(x...) \ |
| 143 | do { \ |
| 144 | if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \ |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 145 | pr_info(x); \ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 146 | if (binder_stop_on_user_error) \ |
| 147 | binder_stop_on_user_error = 2; \ |
| 148 | } while (0) |
| 149 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 150 | #define to_flat_binder_object(hdr) \ |
| 151 | container_of(hdr, struct flat_binder_object, hdr) |
| 152 | |
| 153 | #define to_binder_fd_object(hdr) container_of(hdr, struct binder_fd_object, hdr) |
| 154 | |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 155 | #define to_binder_buffer_object(hdr) \ |
| 156 | container_of(hdr, struct binder_buffer_object, hdr) |
| 157 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 158 | enum binder_stat_types { |
| 159 | BINDER_STAT_PROC, |
| 160 | BINDER_STAT_THREAD, |
| 161 | BINDER_STAT_NODE, |
| 162 | BINDER_STAT_REF, |
| 163 | BINDER_STAT_DEATH, |
| 164 | BINDER_STAT_TRANSACTION, |
| 165 | BINDER_STAT_TRANSACTION_COMPLETE, |
| 166 | BINDER_STAT_COUNT |
| 167 | }; |
| 168 | |
| 169 | struct binder_stats { |
| 170 | int br[_IOC_NR(BR_FAILED_REPLY) + 1]; |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 171 | int bc[_IOC_NR(BC_REPLY_SG) + 1]; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 172 | int obj_created[BINDER_STAT_COUNT]; |
| 173 | int obj_deleted[BINDER_STAT_COUNT]; |
| 174 | }; |
| 175 | |
| 176 | static struct binder_stats binder_stats; |
| 177 | |
| 178 | static inline void binder_stats_deleted(enum binder_stat_types type) |
| 179 | { |
| 180 | binder_stats.obj_deleted[type]++; |
| 181 | } |
| 182 | |
| 183 | static inline void binder_stats_created(enum binder_stat_types type) |
| 184 | { |
| 185 | binder_stats.obj_created[type]++; |
| 186 | } |
| 187 | |
| 188 | struct binder_transaction_log_entry { |
| 189 | int debug_id; |
| 190 | int call_type; |
| 191 | int from_proc; |
| 192 | int from_thread; |
| 193 | int target_handle; |
| 194 | int to_proc; |
| 195 | int to_thread; |
| 196 | int to_node; |
| 197 | int data_size; |
| 198 | int offsets_size; |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 199 | const char *context_name; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 200 | }; |
| 201 | struct binder_transaction_log { |
| 202 | int next; |
| 203 | int full; |
| 204 | struct binder_transaction_log_entry entry[32]; |
| 205 | }; |
| 206 | static struct binder_transaction_log binder_transaction_log; |
| 207 | static struct binder_transaction_log binder_transaction_log_failed; |
| 208 | |
| 209 | static struct binder_transaction_log_entry *binder_transaction_log_add( |
| 210 | struct binder_transaction_log *log) |
| 211 | { |
| 212 | struct binder_transaction_log_entry *e; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 213 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 214 | e = &log->entry[log->next]; |
| 215 | memset(e, 0, sizeof(*e)); |
| 216 | log->next++; |
| 217 | if (log->next == ARRAY_SIZE(log->entry)) { |
| 218 | log->next = 0; |
| 219 | log->full = 1; |
| 220 | } |
| 221 | return e; |
| 222 | } |
| 223 | |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 224 | struct binder_context { |
| 225 | struct binder_node *binder_context_mgr_node; |
| 226 | kuid_t binder_context_mgr_uid; |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 227 | const char *name; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 228 | }; |
| 229 | |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 230 | struct binder_device { |
| 231 | struct hlist_node hlist; |
| 232 | struct miscdevice miscdev; |
| 233 | struct binder_context context; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 234 | }; |
| 235 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 236 | struct binder_work { |
| 237 | struct list_head entry; |
| 238 | enum { |
| 239 | BINDER_WORK_TRANSACTION = 1, |
| 240 | BINDER_WORK_TRANSACTION_COMPLETE, |
| 241 | BINDER_WORK_NODE, |
| 242 | BINDER_WORK_DEAD_BINDER, |
| 243 | BINDER_WORK_DEAD_BINDER_AND_CLEAR, |
| 244 | BINDER_WORK_CLEAR_DEATH_NOTIFICATION, |
| 245 | } type; |
| 246 | }; |
| 247 | |
| 248 | struct binder_node { |
| 249 | int debug_id; |
| 250 | struct binder_work work; |
| 251 | union { |
| 252 | struct rb_node rb_node; |
| 253 | struct hlist_node dead_node; |
| 254 | }; |
| 255 | struct binder_proc *proc; |
| 256 | struct hlist_head refs; |
| 257 | int internal_strong_refs; |
| 258 | int local_weak_refs; |
| 259 | int local_strong_refs; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 260 | binder_uintptr_t ptr; |
| 261 | binder_uintptr_t cookie; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 262 | unsigned has_strong_ref:1; |
| 263 | unsigned pending_strong_ref:1; |
| 264 | unsigned has_weak_ref:1; |
| 265 | unsigned pending_weak_ref:1; |
| 266 | unsigned has_async_transaction:1; |
| 267 | unsigned accept_fds:1; |
| 268 | unsigned min_priority:8; |
| 269 | struct list_head async_todo; |
| 270 | }; |
| 271 | |
| 272 | struct binder_ref_death { |
| 273 | struct binder_work work; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 274 | binder_uintptr_t cookie; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 275 | }; |
| 276 | |
| 277 | struct binder_ref { |
| 278 | /* Lookups needed: */ |
| 279 | /* node + proc => ref (transaction) */ |
| 280 | /* desc + proc => ref (transaction, inc/dec ref) */ |
| 281 | /* node => refs + procs (proc exit) */ |
| 282 | int debug_id; |
| 283 | struct rb_node rb_node_desc; |
| 284 | struct rb_node rb_node_node; |
| 285 | struct hlist_node node_entry; |
| 286 | struct binder_proc *proc; |
| 287 | struct binder_node *node; |
| 288 | uint32_t desc; |
| 289 | int strong; |
| 290 | int weak; |
| 291 | struct binder_ref_death *death; |
| 292 | }; |
| 293 | |
| 294 | struct binder_buffer { |
Justin P. Mattock | 217218f | 2012-01-12 06:51:31 -0800 | [diff] [blame] | 295 | struct list_head entry; /* free and allocated entries by address */ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 296 | struct rb_node rb_node; /* free entry by size or allocated entry */ |
| 297 | /* by address */ |
| 298 | unsigned free:1; |
| 299 | unsigned allow_user_free:1; |
| 300 | unsigned async_transaction:1; |
| 301 | unsigned debug_id:29; |
| 302 | |
| 303 | struct binder_transaction *transaction; |
| 304 | |
| 305 | struct binder_node *target_node; |
| 306 | size_t data_size; |
| 307 | size_t offsets_size; |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 308 | size_t extra_buffers_size; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 309 | uint8_t data[0]; |
| 310 | }; |
| 311 | |
| 312 | enum binder_deferred_state { |
| 313 | BINDER_DEFERRED_PUT_FILES = 0x01, |
| 314 | BINDER_DEFERRED_FLUSH = 0x02, |
| 315 | BINDER_DEFERRED_RELEASE = 0x04, |
| 316 | }; |
| 317 | |
| 318 | struct binder_proc { |
| 319 | struct hlist_node proc_node; |
| 320 | struct rb_root threads; |
| 321 | struct rb_root nodes; |
| 322 | struct rb_root refs_by_desc; |
| 323 | struct rb_root refs_by_node; |
| 324 | int pid; |
| 325 | struct vm_area_struct *vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 326 | struct mm_struct *vma_vm_mm; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 327 | struct task_struct *tsk; |
| 328 | struct files_struct *files; |
| 329 | struct hlist_node deferred_work_node; |
| 330 | int deferred_work; |
| 331 | void *buffer; |
| 332 | ptrdiff_t user_buffer_offset; |
| 333 | |
| 334 | struct list_head buffers; |
| 335 | struct rb_root free_buffers; |
| 336 | struct rb_root allocated_buffers; |
| 337 | size_t free_async_space; |
| 338 | |
| 339 | struct page **pages; |
| 340 | size_t buffer_size; |
| 341 | uint32_t buffer_free; |
| 342 | struct list_head todo; |
| 343 | wait_queue_head_t wait; |
| 344 | struct binder_stats stats; |
| 345 | struct list_head delivered_death; |
| 346 | int max_threads; |
| 347 | int requested_threads; |
| 348 | int requested_threads_started; |
| 349 | int ready_threads; |
| 350 | long default_priority; |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 351 | struct dentry *debugfs_entry; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 352 | struct binder_context *context; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 353 | }; |
| 354 | |
| 355 | enum { |
| 356 | BINDER_LOOPER_STATE_REGISTERED = 0x01, |
| 357 | BINDER_LOOPER_STATE_ENTERED = 0x02, |
| 358 | BINDER_LOOPER_STATE_EXITED = 0x04, |
| 359 | BINDER_LOOPER_STATE_INVALID = 0x08, |
| 360 | BINDER_LOOPER_STATE_WAITING = 0x10, |
| 361 | BINDER_LOOPER_STATE_NEED_RETURN = 0x20 |
| 362 | }; |
| 363 | |
| 364 | struct binder_thread { |
| 365 | struct binder_proc *proc; |
| 366 | struct rb_node rb_node; |
| 367 | int pid; |
| 368 | int looper; |
| 369 | struct binder_transaction *transaction_stack; |
| 370 | struct list_head todo; |
| 371 | uint32_t return_error; /* Write failed, return error code in read buf */ |
| 372 | uint32_t return_error2; /* Write failed, return error code in read */ |
| 373 | /* buffer. Used when sending a reply to a dead process that */ |
| 374 | /* we are also waiting on */ |
| 375 | wait_queue_head_t wait; |
| 376 | struct binder_stats stats; |
| 377 | }; |
| 378 | |
| 379 | struct binder_transaction { |
| 380 | int debug_id; |
| 381 | struct binder_work work; |
| 382 | struct binder_thread *from; |
| 383 | struct binder_transaction *from_parent; |
| 384 | struct binder_proc *to_proc; |
| 385 | struct binder_thread *to_thread; |
| 386 | struct binder_transaction *to_parent; |
| 387 | unsigned need_reply:1; |
| 388 | /* unsigned is_dead:1; */ /* not used at the moment */ |
| 389 | |
| 390 | struct binder_buffer *buffer; |
| 391 | unsigned int code; |
| 392 | unsigned int flags; |
| 393 | long priority; |
| 394 | long saved_priority; |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 395 | kuid_t sender_euid; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 396 | }; |
| 397 | |
| 398 | static void |
| 399 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer); |
| 400 | |
Sachin Kamat | efde99c | 2012-08-17 16:39:36 +0530 | [diff] [blame] | 401 | 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] | 402 | { |
| 403 | struct files_struct *files = proc->files; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 404 | unsigned long rlim_cur; |
| 405 | unsigned long irqs; |
| 406 | |
| 407 | if (files == NULL) |
| 408 | return -ESRCH; |
| 409 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 410 | if (!lock_task_sighand(proc->tsk, &irqs)) |
| 411 | return -EMFILE; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 412 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 413 | rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE); |
| 414 | unlock_task_sighand(proc->tsk, &irqs); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 415 | |
Al Viro | dcfadfa | 2012-08-12 17:27:30 -0400 | [diff] [blame] | 416 | return __alloc_fd(files, 0, rlim_cur, flags); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | /* |
| 420 | * copied from fd_install |
| 421 | */ |
| 422 | static void task_fd_install( |
| 423 | struct binder_proc *proc, unsigned int fd, struct file *file) |
| 424 | { |
Al Viro | f869e8a | 2012-08-15 21:06:33 -0400 | [diff] [blame] | 425 | if (proc->files) |
| 426 | __fd_install(proc->files, fd, file); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 427 | } |
| 428 | |
| 429 | /* |
| 430 | * copied from sys_close |
| 431 | */ |
| 432 | static long task_close_fd(struct binder_proc *proc, unsigned int fd) |
| 433 | { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 434 | int retval; |
| 435 | |
Al Viro | 483ce1d | 2012-08-19 12:04:24 -0400 | [diff] [blame] | 436 | if (proc->files == NULL) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 437 | return -ESRCH; |
| 438 | |
Al Viro | 483ce1d | 2012-08-19 12:04:24 -0400 | [diff] [blame] | 439 | retval = __close_fd(proc->files, fd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 440 | /* can't restart close syscall because file table entry was cleared */ |
| 441 | if (unlikely(retval == -ERESTARTSYS || |
| 442 | retval == -ERESTARTNOINTR || |
| 443 | retval == -ERESTARTNOHAND || |
| 444 | retval == -ERESTART_RESTARTBLOCK)) |
| 445 | retval = -EINTR; |
| 446 | |
| 447 | return retval; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 448 | } |
| 449 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 450 | static inline void binder_lock(const char *tag) |
| 451 | { |
| 452 | trace_binder_lock(tag); |
| 453 | mutex_lock(&binder_main_lock); |
| 454 | trace_binder_locked(tag); |
| 455 | } |
| 456 | |
| 457 | static inline void binder_unlock(const char *tag) |
| 458 | { |
| 459 | trace_binder_unlock(tag); |
| 460 | mutex_unlock(&binder_main_lock); |
| 461 | } |
| 462 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 463 | static void binder_set_nice(long nice) |
| 464 | { |
| 465 | long min_nice; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 466 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 467 | if (can_nice(current, nice)) { |
| 468 | set_user_nice(current, nice); |
| 469 | return; |
| 470 | } |
Dongsheng Yang | 7aa2c01 | 2014-05-08 18:33:49 +0900 | [diff] [blame] | 471 | min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 472 | binder_debug(BINDER_DEBUG_PRIORITY_CAP, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 473 | "%d: nice value %ld not allowed use %ld instead\n", |
| 474 | current->pid, nice, min_nice); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 475 | set_user_nice(current, min_nice); |
Dongsheng Yang | 8698a74 | 2014-03-11 18:09:12 +0800 | [diff] [blame] | 476 | if (min_nice <= MAX_NICE) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 477 | return; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 478 | binder_user_error("%d RLIMIT_NICE not set\n", current->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 479 | } |
| 480 | |
| 481 | static size_t binder_buffer_size(struct binder_proc *proc, |
| 482 | struct binder_buffer *buffer) |
| 483 | { |
| 484 | if (list_is_last(&buffer->entry, &proc->buffers)) |
| 485 | return proc->buffer + proc->buffer_size - (void *)buffer->data; |
Karthik Nayak | 7873311 | 2014-06-21 20:23:16 +0530 | [diff] [blame] | 486 | return (size_t)list_entry(buffer->entry.next, |
| 487 | struct binder_buffer, entry) - (size_t)buffer->data; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | static void binder_insert_free_buffer(struct binder_proc *proc, |
| 491 | struct binder_buffer *new_buffer) |
| 492 | { |
| 493 | struct rb_node **p = &proc->free_buffers.rb_node; |
| 494 | struct rb_node *parent = NULL; |
| 495 | struct binder_buffer *buffer; |
| 496 | size_t buffer_size; |
| 497 | size_t new_buffer_size; |
| 498 | |
| 499 | BUG_ON(!new_buffer->free); |
| 500 | |
| 501 | new_buffer_size = binder_buffer_size(proc, new_buffer); |
| 502 | |
| 503 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 504 | "%d: add free buffer, size %zd, at %p\n", |
| 505 | proc->pid, new_buffer_size, new_buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 506 | |
| 507 | while (*p) { |
| 508 | parent = *p; |
| 509 | buffer = rb_entry(parent, struct binder_buffer, rb_node); |
| 510 | BUG_ON(!buffer->free); |
| 511 | |
| 512 | buffer_size = binder_buffer_size(proc, buffer); |
| 513 | |
| 514 | if (new_buffer_size < buffer_size) |
| 515 | p = &parent->rb_left; |
| 516 | else |
| 517 | p = &parent->rb_right; |
| 518 | } |
| 519 | rb_link_node(&new_buffer->rb_node, parent, p); |
| 520 | rb_insert_color(&new_buffer->rb_node, &proc->free_buffers); |
| 521 | } |
| 522 | |
| 523 | static void binder_insert_allocated_buffer(struct binder_proc *proc, |
| 524 | struct binder_buffer *new_buffer) |
| 525 | { |
| 526 | struct rb_node **p = &proc->allocated_buffers.rb_node; |
| 527 | struct rb_node *parent = NULL; |
| 528 | struct binder_buffer *buffer; |
| 529 | |
| 530 | BUG_ON(new_buffer->free); |
| 531 | |
| 532 | while (*p) { |
| 533 | parent = *p; |
| 534 | buffer = rb_entry(parent, struct binder_buffer, rb_node); |
| 535 | BUG_ON(buffer->free); |
| 536 | |
| 537 | if (new_buffer < buffer) |
| 538 | p = &parent->rb_left; |
| 539 | else if (new_buffer > buffer) |
| 540 | p = &parent->rb_right; |
| 541 | else |
| 542 | BUG(); |
| 543 | } |
| 544 | rb_link_node(&new_buffer->rb_node, parent, p); |
| 545 | rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers); |
| 546 | } |
| 547 | |
| 548 | static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 549 | uintptr_t user_ptr) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 550 | { |
| 551 | struct rb_node *n = proc->allocated_buffers.rb_node; |
| 552 | struct binder_buffer *buffer; |
| 553 | struct binder_buffer *kern_ptr; |
| 554 | |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 555 | kern_ptr = (struct binder_buffer *)(user_ptr - proc->user_buffer_offset |
| 556 | - offsetof(struct binder_buffer, data)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 557 | |
| 558 | while (n) { |
| 559 | buffer = rb_entry(n, struct binder_buffer, rb_node); |
| 560 | BUG_ON(buffer->free); |
| 561 | |
| 562 | if (kern_ptr < buffer) |
| 563 | n = n->rb_left; |
| 564 | else if (kern_ptr > buffer) |
| 565 | n = n->rb_right; |
| 566 | else |
| 567 | return buffer; |
| 568 | } |
| 569 | return NULL; |
| 570 | } |
| 571 | |
| 572 | static int binder_update_page_range(struct binder_proc *proc, int allocate, |
| 573 | void *start, void *end, |
| 574 | struct vm_area_struct *vma) |
| 575 | { |
| 576 | void *page_addr; |
| 577 | unsigned long user_page_addr; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 578 | struct page **page; |
| 579 | struct mm_struct *mm; |
| 580 | |
| 581 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 582 | "%d: %s pages %p-%p\n", proc->pid, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 583 | allocate ? "allocate" : "free", start, end); |
| 584 | |
| 585 | if (end <= start) |
| 586 | return 0; |
| 587 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 588 | trace_binder_update_page_range(proc, allocate, start, end); |
| 589 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 590 | if (vma) |
| 591 | mm = NULL; |
| 592 | else |
| 593 | mm = get_task_mm(proc->tsk); |
| 594 | |
| 595 | if (mm) { |
| 596 | down_write(&mm->mmap_sem); |
| 597 | vma = proc->vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 598 | if (vma && mm != proc->vma_vm_mm) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 599 | pr_err("%d: vma mm and task mm mismatch\n", |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 600 | proc->pid); |
| 601 | vma = NULL; |
| 602 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | if (allocate == 0) |
| 606 | goto free_range; |
| 607 | |
| 608 | if (vma == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 609 | pr_err("%d: binder_alloc_buf failed to map pages in userspace, no vma\n", |
| 610 | proc->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 611 | goto err_no_vma; |
| 612 | } |
| 613 | |
| 614 | for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) { |
| 615 | int ret; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 616 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 617 | page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; |
| 618 | |
| 619 | BUG_ON(*page); |
Arve Hjønnevåg | 585650d | 2012-10-16 15:29:55 -0700 | [diff] [blame] | 620 | *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 621 | if (*page == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 622 | pr_err("%d: binder_alloc_buf failed for page at %p\n", |
| 623 | proc->pid, page_addr); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 624 | goto err_alloc_page_failed; |
| 625 | } |
Andrey Ryabinin | f4c72c7 | 2015-02-27 20:44:21 +0300 | [diff] [blame] | 626 | ret = map_kernel_range_noflush((unsigned long)page_addr, |
| 627 | PAGE_SIZE, PAGE_KERNEL, page); |
| 628 | flush_cache_vmap((unsigned long)page_addr, |
| 629 | (unsigned long)page_addr + PAGE_SIZE); |
| 630 | if (ret != 1) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 631 | 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] | 632 | proc->pid, page_addr); |
| 633 | goto err_map_kernel_failed; |
| 634 | } |
| 635 | user_page_addr = |
| 636 | (uintptr_t)page_addr + proc->user_buffer_offset; |
| 637 | ret = vm_insert_page(vma, user_page_addr, page[0]); |
| 638 | if (ret) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 639 | 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] | 640 | proc->pid, user_page_addr); |
| 641 | goto err_vm_insert_page_failed; |
| 642 | } |
| 643 | /* vm_insert_page does not seem to increment the refcount */ |
| 644 | } |
| 645 | if (mm) { |
| 646 | up_write(&mm->mmap_sem); |
| 647 | mmput(mm); |
| 648 | } |
| 649 | return 0; |
| 650 | |
| 651 | free_range: |
| 652 | for (page_addr = end - PAGE_SIZE; page_addr >= start; |
| 653 | page_addr -= PAGE_SIZE) { |
| 654 | page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; |
| 655 | if (vma) |
| 656 | zap_page_range(vma, (uintptr_t)page_addr + |
| 657 | proc->user_buffer_offset, PAGE_SIZE, NULL); |
| 658 | err_vm_insert_page_failed: |
| 659 | unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE); |
| 660 | err_map_kernel_failed: |
| 661 | __free_page(*page); |
| 662 | *page = NULL; |
| 663 | err_alloc_page_failed: |
| 664 | ; |
| 665 | } |
| 666 | err_no_vma: |
| 667 | if (mm) { |
| 668 | up_write(&mm->mmap_sem); |
| 669 | mmput(mm); |
| 670 | } |
| 671 | return -ENOMEM; |
| 672 | } |
| 673 | |
| 674 | static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc, |
| 675 | size_t data_size, |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 676 | size_t offsets_size, |
| 677 | size_t extra_buffers_size, |
| 678 | int is_async) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 679 | { |
| 680 | struct rb_node *n = proc->free_buffers.rb_node; |
| 681 | struct binder_buffer *buffer; |
| 682 | size_t buffer_size; |
| 683 | struct rb_node *best_fit = NULL; |
| 684 | void *has_page_addr; |
| 685 | void *end_page_addr; |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 686 | size_t size, data_offsets_size; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 687 | |
| 688 | if (proc->vma == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 689 | pr_err("%d: binder_alloc_buf, no vma\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 690 | proc->pid); |
| 691 | return NULL; |
| 692 | } |
| 693 | |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 694 | data_offsets_size = ALIGN(data_size, sizeof(void *)) + |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 695 | ALIGN(offsets_size, sizeof(void *)); |
| 696 | |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 697 | if (data_offsets_size < data_size || data_offsets_size < offsets_size) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 698 | binder_user_error("%d: got transaction with invalid size %zd-%zd\n", |
| 699 | proc->pid, data_size, offsets_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 700 | return NULL; |
| 701 | } |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 702 | size = data_offsets_size + ALIGN(extra_buffers_size, sizeof(void *)); |
| 703 | if (size < data_offsets_size || size < extra_buffers_size) { |
| 704 | binder_user_error("%d: got transaction with invalid extra_buffers_size %zd\n", |
| 705 | proc->pid, extra_buffers_size); |
| 706 | return NULL; |
| 707 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 708 | if (is_async && |
| 709 | proc->free_async_space < size + sizeof(struct binder_buffer)) { |
| 710 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 711 | "%d: binder_alloc_buf size %zd failed, no async space left\n", |
| 712 | proc->pid, size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 713 | return NULL; |
| 714 | } |
| 715 | |
| 716 | while (n) { |
| 717 | buffer = rb_entry(n, struct binder_buffer, rb_node); |
| 718 | BUG_ON(!buffer->free); |
| 719 | buffer_size = binder_buffer_size(proc, buffer); |
| 720 | |
| 721 | if (size < buffer_size) { |
| 722 | best_fit = n; |
| 723 | n = n->rb_left; |
| 724 | } else if (size > buffer_size) |
| 725 | n = n->rb_right; |
| 726 | else { |
| 727 | best_fit = n; |
| 728 | break; |
| 729 | } |
| 730 | } |
| 731 | if (best_fit == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 732 | pr_err("%d: binder_alloc_buf size %zd failed, no address space\n", |
| 733 | proc->pid, size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 734 | return NULL; |
| 735 | } |
| 736 | if (n == NULL) { |
| 737 | buffer = rb_entry(best_fit, struct binder_buffer, rb_node); |
| 738 | buffer_size = binder_buffer_size(proc, buffer); |
| 739 | } |
| 740 | |
| 741 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 742 | "%d: binder_alloc_buf size %zd got buffer %p size %zd\n", |
| 743 | proc->pid, size, buffer, buffer_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 744 | |
| 745 | has_page_addr = |
| 746 | (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK); |
| 747 | if (n == NULL) { |
| 748 | if (size + sizeof(struct binder_buffer) + 4 >= buffer_size) |
| 749 | buffer_size = size; /* no room for other buffers */ |
| 750 | else |
| 751 | buffer_size = size + sizeof(struct binder_buffer); |
| 752 | } |
| 753 | end_page_addr = |
| 754 | (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size); |
| 755 | if (end_page_addr > has_page_addr) |
| 756 | end_page_addr = has_page_addr; |
| 757 | if (binder_update_page_range(proc, 1, |
| 758 | (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL)) |
| 759 | return NULL; |
| 760 | |
| 761 | rb_erase(best_fit, &proc->free_buffers); |
| 762 | buffer->free = 0; |
| 763 | binder_insert_allocated_buffer(proc, buffer); |
| 764 | if (buffer_size != size) { |
| 765 | struct binder_buffer *new_buffer = (void *)buffer->data + size; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 766 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 767 | list_add(&new_buffer->entry, &buffer->entry); |
| 768 | new_buffer->free = 1; |
| 769 | binder_insert_free_buffer(proc, new_buffer); |
| 770 | } |
| 771 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 772 | "%d: binder_alloc_buf size %zd got %p\n", |
| 773 | proc->pid, size, buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 774 | buffer->data_size = data_size; |
| 775 | buffer->offsets_size = offsets_size; |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 776 | buffer->extra_buffers_size = extra_buffers_size; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 777 | buffer->async_transaction = is_async; |
| 778 | if (is_async) { |
| 779 | proc->free_async_space -= size + sizeof(struct binder_buffer); |
| 780 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 781 | "%d: binder_alloc_buf size %zd async free %zd\n", |
| 782 | proc->pid, size, proc->free_async_space); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | return buffer; |
| 786 | } |
| 787 | |
| 788 | static void *buffer_start_page(struct binder_buffer *buffer) |
| 789 | { |
| 790 | return (void *)((uintptr_t)buffer & PAGE_MASK); |
| 791 | } |
| 792 | |
| 793 | static void *buffer_end_page(struct binder_buffer *buffer) |
| 794 | { |
| 795 | return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK); |
| 796 | } |
| 797 | |
| 798 | static void binder_delete_free_buffer(struct binder_proc *proc, |
| 799 | struct binder_buffer *buffer) |
| 800 | { |
| 801 | struct binder_buffer *prev, *next = NULL; |
| 802 | int free_page_end = 1; |
| 803 | int free_page_start = 1; |
| 804 | |
| 805 | BUG_ON(proc->buffers.next == &buffer->entry); |
| 806 | prev = list_entry(buffer->entry.prev, struct binder_buffer, entry); |
| 807 | BUG_ON(!prev->free); |
| 808 | if (buffer_end_page(prev) == buffer_start_page(buffer)) { |
| 809 | free_page_start = 0; |
| 810 | if (buffer_end_page(prev) == buffer_end_page(buffer)) |
| 811 | free_page_end = 0; |
| 812 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 813 | "%d: merge free, buffer %p share page with %p\n", |
| 814 | proc->pid, buffer, prev); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 815 | } |
| 816 | |
| 817 | if (!list_is_last(&buffer->entry, &proc->buffers)) { |
| 818 | next = list_entry(buffer->entry.next, |
| 819 | struct binder_buffer, entry); |
| 820 | if (buffer_start_page(next) == buffer_end_page(buffer)) { |
| 821 | free_page_end = 0; |
| 822 | if (buffer_start_page(next) == |
| 823 | buffer_start_page(buffer)) |
| 824 | free_page_start = 0; |
| 825 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 826 | "%d: merge free, buffer %p share page with %p\n", |
| 827 | proc->pid, buffer, prev); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 828 | } |
| 829 | } |
| 830 | list_del(&buffer->entry); |
| 831 | if (free_page_start || free_page_end) { |
| 832 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Masanari Iida | 1dcdbfd | 2013-06-23 23:47:15 +0900 | [diff] [blame] | 833 | "%d: merge free, buffer %p do not share page%s%s with %p or %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 834 | proc->pid, buffer, free_page_start ? "" : " end", |
| 835 | free_page_end ? "" : " start", prev, next); |
| 836 | binder_update_page_range(proc, 0, free_page_start ? |
| 837 | buffer_start_page(buffer) : buffer_end_page(buffer), |
| 838 | (free_page_end ? buffer_end_page(buffer) : |
| 839 | buffer_start_page(buffer)) + PAGE_SIZE, NULL); |
| 840 | } |
| 841 | } |
| 842 | |
| 843 | static void binder_free_buf(struct binder_proc *proc, |
| 844 | struct binder_buffer *buffer) |
| 845 | { |
| 846 | size_t size, buffer_size; |
| 847 | |
| 848 | buffer_size = binder_buffer_size(proc, buffer); |
| 849 | |
| 850 | size = ALIGN(buffer->data_size, sizeof(void *)) + |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 851 | ALIGN(buffer->offsets_size, sizeof(void *)) + |
| 852 | ALIGN(buffer->extra_buffers_size, sizeof(void *)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 853 | |
| 854 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 855 | "%d: binder_free_buf %p size %zd buffer_size %zd\n", |
| 856 | proc->pid, buffer, size, buffer_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 857 | |
| 858 | BUG_ON(buffer->free); |
| 859 | BUG_ON(size > buffer_size); |
| 860 | BUG_ON(buffer->transaction != NULL); |
| 861 | BUG_ON((void *)buffer < proc->buffer); |
| 862 | BUG_ON((void *)buffer > proc->buffer + proc->buffer_size); |
| 863 | |
| 864 | if (buffer->async_transaction) { |
| 865 | proc->free_async_space += size + sizeof(struct binder_buffer); |
| 866 | |
| 867 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 868 | "%d: binder_free_buf size %zd async free %zd\n", |
| 869 | proc->pid, size, proc->free_async_space); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | binder_update_page_range(proc, 0, |
| 873 | (void *)PAGE_ALIGN((uintptr_t)buffer->data), |
| 874 | (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK), |
| 875 | NULL); |
| 876 | rb_erase(&buffer->rb_node, &proc->allocated_buffers); |
| 877 | buffer->free = 1; |
| 878 | if (!list_is_last(&buffer->entry, &proc->buffers)) { |
| 879 | struct binder_buffer *next = list_entry(buffer->entry.next, |
| 880 | struct binder_buffer, entry); |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 881 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 882 | if (next->free) { |
| 883 | rb_erase(&next->rb_node, &proc->free_buffers); |
| 884 | binder_delete_free_buffer(proc, next); |
| 885 | } |
| 886 | } |
| 887 | if (proc->buffers.next != &buffer->entry) { |
| 888 | struct binder_buffer *prev = list_entry(buffer->entry.prev, |
| 889 | struct binder_buffer, entry); |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 890 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 891 | if (prev->free) { |
| 892 | binder_delete_free_buffer(proc, buffer); |
| 893 | rb_erase(&prev->rb_node, &proc->free_buffers); |
| 894 | buffer = prev; |
| 895 | } |
| 896 | } |
| 897 | binder_insert_free_buffer(proc, buffer); |
| 898 | } |
| 899 | |
| 900 | static struct binder_node *binder_get_node(struct binder_proc *proc, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 901 | binder_uintptr_t ptr) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 902 | { |
| 903 | struct rb_node *n = proc->nodes.rb_node; |
| 904 | struct binder_node *node; |
| 905 | |
| 906 | while (n) { |
| 907 | node = rb_entry(n, struct binder_node, rb_node); |
| 908 | |
| 909 | if (ptr < node->ptr) |
| 910 | n = n->rb_left; |
| 911 | else if (ptr > node->ptr) |
| 912 | n = n->rb_right; |
| 913 | else |
| 914 | return node; |
| 915 | } |
| 916 | return NULL; |
| 917 | } |
| 918 | |
| 919 | static struct binder_node *binder_new_node(struct binder_proc *proc, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 920 | binder_uintptr_t ptr, |
| 921 | binder_uintptr_t cookie) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 922 | { |
| 923 | struct rb_node **p = &proc->nodes.rb_node; |
| 924 | struct rb_node *parent = NULL; |
| 925 | struct binder_node *node; |
| 926 | |
| 927 | while (*p) { |
| 928 | parent = *p; |
| 929 | node = rb_entry(parent, struct binder_node, rb_node); |
| 930 | |
| 931 | if (ptr < node->ptr) |
| 932 | p = &(*p)->rb_left; |
| 933 | else if (ptr > node->ptr) |
| 934 | p = &(*p)->rb_right; |
| 935 | else |
| 936 | return NULL; |
| 937 | } |
| 938 | |
| 939 | node = kzalloc(sizeof(*node), GFP_KERNEL); |
| 940 | if (node == NULL) |
| 941 | return NULL; |
| 942 | binder_stats_created(BINDER_STAT_NODE); |
| 943 | rb_link_node(&node->rb_node, parent, p); |
| 944 | rb_insert_color(&node->rb_node, &proc->nodes); |
| 945 | node->debug_id = ++binder_last_id; |
| 946 | node->proc = proc; |
| 947 | node->ptr = ptr; |
| 948 | node->cookie = cookie; |
| 949 | node->work.type = BINDER_WORK_NODE; |
| 950 | INIT_LIST_HEAD(&node->work.entry); |
| 951 | INIT_LIST_HEAD(&node->async_todo); |
| 952 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 953 | "%d:%d node %d u%016llx c%016llx created\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 954 | proc->pid, current->pid, node->debug_id, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 955 | (u64)node->ptr, (u64)node->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 956 | return node; |
| 957 | } |
| 958 | |
| 959 | static int binder_inc_node(struct binder_node *node, int strong, int internal, |
| 960 | struct list_head *target_list) |
| 961 | { |
| 962 | if (strong) { |
| 963 | if (internal) { |
| 964 | if (target_list == NULL && |
| 965 | node->internal_strong_refs == 0 && |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 966 | !(node->proc && |
| 967 | node == node->proc->context-> |
| 968 | binder_context_mgr_node && |
| 969 | node->has_strong_ref)) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 970 | pr_err("invalid inc strong node for %d\n", |
| 971 | node->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 972 | return -EINVAL; |
| 973 | } |
| 974 | node->internal_strong_refs++; |
| 975 | } else |
| 976 | node->local_strong_refs++; |
| 977 | if (!node->has_strong_ref && target_list) { |
| 978 | list_del_init(&node->work.entry); |
| 979 | list_add_tail(&node->work.entry, target_list); |
| 980 | } |
| 981 | } else { |
| 982 | if (!internal) |
| 983 | node->local_weak_refs++; |
| 984 | if (!node->has_weak_ref && list_empty(&node->work.entry)) { |
| 985 | if (target_list == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 986 | pr_err("invalid inc weak node for %d\n", |
| 987 | node->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 988 | return -EINVAL; |
| 989 | } |
| 990 | list_add_tail(&node->work.entry, target_list); |
| 991 | } |
| 992 | } |
| 993 | return 0; |
| 994 | } |
| 995 | |
| 996 | static int binder_dec_node(struct binder_node *node, int strong, int internal) |
| 997 | { |
| 998 | if (strong) { |
| 999 | if (internal) |
| 1000 | node->internal_strong_refs--; |
| 1001 | else |
| 1002 | node->local_strong_refs--; |
| 1003 | if (node->local_strong_refs || node->internal_strong_refs) |
| 1004 | return 0; |
| 1005 | } else { |
| 1006 | if (!internal) |
| 1007 | node->local_weak_refs--; |
| 1008 | if (node->local_weak_refs || !hlist_empty(&node->refs)) |
| 1009 | return 0; |
| 1010 | } |
| 1011 | if (node->proc && (node->has_strong_ref || node->has_weak_ref)) { |
| 1012 | if (list_empty(&node->work.entry)) { |
| 1013 | list_add_tail(&node->work.entry, &node->proc->todo); |
| 1014 | wake_up_interruptible(&node->proc->wait); |
| 1015 | } |
| 1016 | } else { |
| 1017 | if (hlist_empty(&node->refs) && !node->local_strong_refs && |
| 1018 | !node->local_weak_refs) { |
| 1019 | list_del_init(&node->work.entry); |
| 1020 | if (node->proc) { |
| 1021 | rb_erase(&node->rb_node, &node->proc->nodes); |
| 1022 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1023 | "refless node %d deleted\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1024 | node->debug_id); |
| 1025 | } else { |
| 1026 | hlist_del(&node->dead_node); |
| 1027 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1028 | "dead node %d deleted\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1029 | node->debug_id); |
| 1030 | } |
| 1031 | kfree(node); |
| 1032 | binder_stats_deleted(BINDER_STAT_NODE); |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | return 0; |
| 1037 | } |
| 1038 | |
| 1039 | |
| 1040 | static struct binder_ref *binder_get_ref(struct binder_proc *proc, |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1041 | u32 desc, bool need_strong_ref) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1042 | { |
| 1043 | struct rb_node *n = proc->refs_by_desc.rb_node; |
| 1044 | struct binder_ref *ref; |
| 1045 | |
| 1046 | while (n) { |
| 1047 | ref = rb_entry(n, struct binder_ref, rb_node_desc); |
| 1048 | |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1049 | if (desc < ref->desc) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1050 | n = n->rb_left; |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1051 | } else if (desc > ref->desc) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1052 | n = n->rb_right; |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1053 | } else if (need_strong_ref && !ref->strong) { |
| 1054 | binder_user_error("tried to use weak ref as strong ref\n"); |
| 1055 | return NULL; |
| 1056 | } else { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1057 | return ref; |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1058 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1059 | } |
| 1060 | return NULL; |
| 1061 | } |
| 1062 | |
| 1063 | static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc, |
| 1064 | struct binder_node *node) |
| 1065 | { |
| 1066 | struct rb_node *n; |
| 1067 | struct rb_node **p = &proc->refs_by_node.rb_node; |
| 1068 | struct rb_node *parent = NULL; |
| 1069 | struct binder_ref *ref, *new_ref; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 1070 | struct binder_context *context = proc->context; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1071 | |
| 1072 | while (*p) { |
| 1073 | parent = *p; |
| 1074 | ref = rb_entry(parent, struct binder_ref, rb_node_node); |
| 1075 | |
| 1076 | if (node < ref->node) |
| 1077 | p = &(*p)->rb_left; |
| 1078 | else if (node > ref->node) |
| 1079 | p = &(*p)->rb_right; |
| 1080 | else |
| 1081 | return ref; |
| 1082 | } |
| 1083 | new_ref = kzalloc(sizeof(*ref), GFP_KERNEL); |
| 1084 | if (new_ref == NULL) |
| 1085 | return NULL; |
| 1086 | binder_stats_created(BINDER_STAT_REF); |
| 1087 | new_ref->debug_id = ++binder_last_id; |
| 1088 | new_ref->proc = proc; |
| 1089 | new_ref->node = node; |
| 1090 | rb_link_node(&new_ref->rb_node_node, parent, p); |
| 1091 | rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node); |
| 1092 | |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 1093 | new_ref->desc = (node == context->binder_context_mgr_node) ? 0 : 1; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1094 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
| 1095 | ref = rb_entry(n, struct binder_ref, rb_node_desc); |
| 1096 | if (ref->desc > new_ref->desc) |
| 1097 | break; |
| 1098 | new_ref->desc = ref->desc + 1; |
| 1099 | } |
| 1100 | |
| 1101 | p = &proc->refs_by_desc.rb_node; |
| 1102 | while (*p) { |
| 1103 | parent = *p; |
| 1104 | ref = rb_entry(parent, struct binder_ref, rb_node_desc); |
| 1105 | |
| 1106 | if (new_ref->desc < ref->desc) |
| 1107 | p = &(*p)->rb_left; |
| 1108 | else if (new_ref->desc > ref->desc) |
| 1109 | p = &(*p)->rb_right; |
| 1110 | else |
| 1111 | BUG(); |
| 1112 | } |
| 1113 | rb_link_node(&new_ref->rb_node_desc, parent, p); |
| 1114 | rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc); |
| 1115 | if (node) { |
| 1116 | hlist_add_head(&new_ref->node_entry, &node->refs); |
| 1117 | |
| 1118 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1119 | "%d new ref %d desc %d for node %d\n", |
| 1120 | proc->pid, new_ref->debug_id, new_ref->desc, |
| 1121 | node->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1122 | } else { |
| 1123 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1124 | "%d new ref %d desc %d for dead node\n", |
| 1125 | proc->pid, new_ref->debug_id, new_ref->desc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1126 | } |
| 1127 | return new_ref; |
| 1128 | } |
| 1129 | |
| 1130 | static void binder_delete_ref(struct binder_ref *ref) |
| 1131 | { |
| 1132 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1133 | "%d delete ref %d desc %d for node %d\n", |
| 1134 | ref->proc->pid, ref->debug_id, ref->desc, |
| 1135 | ref->node->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1136 | |
| 1137 | rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc); |
| 1138 | rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node); |
| 1139 | if (ref->strong) |
| 1140 | binder_dec_node(ref->node, 1, 1); |
| 1141 | hlist_del(&ref->node_entry); |
| 1142 | binder_dec_node(ref->node, 0, 1); |
| 1143 | if (ref->death) { |
| 1144 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1145 | "%d delete ref %d desc %d has death notification\n", |
| 1146 | ref->proc->pid, ref->debug_id, ref->desc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1147 | list_del(&ref->death->work.entry); |
| 1148 | kfree(ref->death); |
| 1149 | binder_stats_deleted(BINDER_STAT_DEATH); |
| 1150 | } |
| 1151 | kfree(ref); |
| 1152 | binder_stats_deleted(BINDER_STAT_REF); |
| 1153 | } |
| 1154 | |
| 1155 | static int binder_inc_ref(struct binder_ref *ref, int strong, |
| 1156 | struct list_head *target_list) |
| 1157 | { |
| 1158 | int ret; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1159 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1160 | if (strong) { |
| 1161 | if (ref->strong == 0) { |
| 1162 | ret = binder_inc_node(ref->node, 1, 1, target_list); |
| 1163 | if (ret) |
| 1164 | return ret; |
| 1165 | } |
| 1166 | ref->strong++; |
| 1167 | } else { |
| 1168 | if (ref->weak == 0) { |
| 1169 | ret = binder_inc_node(ref->node, 0, 1, target_list); |
| 1170 | if (ret) |
| 1171 | return ret; |
| 1172 | } |
| 1173 | ref->weak++; |
| 1174 | } |
| 1175 | return 0; |
| 1176 | } |
| 1177 | |
| 1178 | |
| 1179 | static int binder_dec_ref(struct binder_ref *ref, int strong) |
| 1180 | { |
| 1181 | if (strong) { |
| 1182 | if (ref->strong == 0) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1183 | 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] | 1184 | ref->proc->pid, ref->debug_id, |
| 1185 | ref->desc, ref->strong, ref->weak); |
| 1186 | return -EINVAL; |
| 1187 | } |
| 1188 | ref->strong--; |
| 1189 | if (ref->strong == 0) { |
| 1190 | int ret; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1191 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1192 | ret = binder_dec_node(ref->node, strong, 1); |
| 1193 | if (ret) |
| 1194 | return ret; |
| 1195 | } |
| 1196 | } else { |
| 1197 | if (ref->weak == 0) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1198 | 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] | 1199 | ref->proc->pid, ref->debug_id, |
| 1200 | ref->desc, ref->strong, ref->weak); |
| 1201 | return -EINVAL; |
| 1202 | } |
| 1203 | ref->weak--; |
| 1204 | } |
| 1205 | if (ref->strong == 0 && ref->weak == 0) |
| 1206 | binder_delete_ref(ref); |
| 1207 | return 0; |
| 1208 | } |
| 1209 | |
| 1210 | static void binder_pop_transaction(struct binder_thread *target_thread, |
| 1211 | struct binder_transaction *t) |
| 1212 | { |
| 1213 | if (target_thread) { |
| 1214 | BUG_ON(target_thread->transaction_stack != t); |
| 1215 | BUG_ON(target_thread->transaction_stack->from != target_thread); |
| 1216 | target_thread->transaction_stack = |
| 1217 | target_thread->transaction_stack->from_parent; |
| 1218 | t->from = NULL; |
| 1219 | } |
| 1220 | t->need_reply = 0; |
| 1221 | if (t->buffer) |
| 1222 | t->buffer->transaction = NULL; |
| 1223 | kfree(t); |
| 1224 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 1225 | } |
| 1226 | |
| 1227 | static void binder_send_failed_reply(struct binder_transaction *t, |
| 1228 | uint32_t error_code) |
| 1229 | { |
| 1230 | struct binder_thread *target_thread; |
Lucas Tanure | d4ec15e | 2014-07-13 21:31:05 -0300 | [diff] [blame] | 1231 | struct binder_transaction *next; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1232 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1233 | BUG_ON(t->flags & TF_ONE_WAY); |
| 1234 | while (1) { |
| 1235 | target_thread = t->from; |
| 1236 | if (target_thread) { |
| 1237 | if (target_thread->return_error != BR_OK && |
| 1238 | target_thread->return_error2 == BR_OK) { |
| 1239 | target_thread->return_error2 = |
| 1240 | target_thread->return_error; |
| 1241 | target_thread->return_error = BR_OK; |
| 1242 | } |
| 1243 | if (target_thread->return_error == BR_OK) { |
| 1244 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1245 | "send failed reply for transaction %d to %d:%d\n", |
William Panlener | 0232a42 | 2014-09-03 22:44:03 -0500 | [diff] [blame] | 1246 | t->debug_id, |
| 1247 | target_thread->proc->pid, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1248 | target_thread->pid); |
| 1249 | |
| 1250 | binder_pop_transaction(target_thread, t); |
| 1251 | target_thread->return_error = error_code; |
| 1252 | wake_up_interruptible(&target_thread->wait); |
| 1253 | } else { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1254 | pr_err("reply failed, target thread, %d:%d, has error code %d already\n", |
| 1255 | target_thread->proc->pid, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1256 | target_thread->pid, |
| 1257 | target_thread->return_error); |
| 1258 | } |
| 1259 | return; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1260 | } |
Lucas Tanure | d4ec15e | 2014-07-13 21:31:05 -0300 | [diff] [blame] | 1261 | next = t->from_parent; |
| 1262 | |
| 1263 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
| 1264 | "send failed reply for transaction %d, target dead\n", |
| 1265 | t->debug_id); |
| 1266 | |
| 1267 | binder_pop_transaction(target_thread, t); |
| 1268 | if (next == NULL) { |
| 1269 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 1270 | "reply failed, no target thread at root\n"); |
| 1271 | return; |
| 1272 | } |
| 1273 | t = next; |
| 1274 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 1275 | "reply failed, no target thread -- retry %d\n", |
| 1276 | t->debug_id); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1277 | } |
| 1278 | } |
| 1279 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1280 | /** |
| 1281 | * binder_validate_object() - checks for a valid metadata object in a buffer. |
| 1282 | * @buffer: binder_buffer that we're parsing. |
| 1283 | * @offset: offset in the buffer at which to validate an object. |
| 1284 | * |
| 1285 | * Return: If there's a valid metadata object at @offset in @buffer, the |
| 1286 | * size of that object. Otherwise, it returns zero. |
| 1287 | */ |
| 1288 | static size_t binder_validate_object(struct binder_buffer *buffer, u64 offset) |
| 1289 | { |
| 1290 | /* Check if we can read a header first */ |
| 1291 | struct binder_object_header *hdr; |
| 1292 | size_t object_size = 0; |
| 1293 | |
| 1294 | if (offset > buffer->data_size - sizeof(*hdr) || |
| 1295 | buffer->data_size < sizeof(*hdr) || |
| 1296 | !IS_ALIGNED(offset, sizeof(u32))) |
| 1297 | return 0; |
| 1298 | |
| 1299 | /* Ok, now see if we can read a complete object. */ |
| 1300 | hdr = (struct binder_object_header *)(buffer->data + offset); |
| 1301 | switch (hdr->type) { |
| 1302 | case BINDER_TYPE_BINDER: |
| 1303 | case BINDER_TYPE_WEAK_BINDER: |
| 1304 | case BINDER_TYPE_HANDLE: |
| 1305 | case BINDER_TYPE_WEAK_HANDLE: |
| 1306 | object_size = sizeof(struct flat_binder_object); |
| 1307 | break; |
| 1308 | case BINDER_TYPE_FD: |
| 1309 | object_size = sizeof(struct binder_fd_object); |
| 1310 | break; |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1311 | case BINDER_TYPE_PTR: |
| 1312 | object_size = sizeof(struct binder_buffer_object); |
| 1313 | break; |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1314 | default: |
| 1315 | return 0; |
| 1316 | } |
| 1317 | if (offset <= buffer->data_size - object_size && |
| 1318 | buffer->data_size >= object_size) |
| 1319 | return object_size; |
| 1320 | else |
| 1321 | return 0; |
| 1322 | } |
| 1323 | |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1324 | /** |
| 1325 | * binder_validate_ptr() - validates binder_buffer_object in a binder_buffer. |
| 1326 | * @b: binder_buffer containing the object |
| 1327 | * @index: index in offset array at which the binder_buffer_object is |
| 1328 | * located |
| 1329 | * @start: points to the start of the offset array |
| 1330 | * @num_valid: the number of valid offsets in the offset array |
| 1331 | * |
| 1332 | * Return: If @index is within the valid range of the offset array |
| 1333 | * described by @start and @num_valid, and if there's a valid |
| 1334 | * binder_buffer_object at the offset found in index @index |
| 1335 | * of the offset array, that object is returned. Otherwise, |
| 1336 | * %NULL is returned. |
| 1337 | * Note that the offset found in index @index itself is not |
| 1338 | * verified; this function assumes that @num_valid elements |
| 1339 | * from @start were previously verified to have valid offsets. |
| 1340 | */ |
| 1341 | static struct binder_buffer_object *binder_validate_ptr(struct binder_buffer *b, |
| 1342 | binder_size_t index, |
| 1343 | binder_size_t *start, |
| 1344 | binder_size_t num_valid) |
| 1345 | { |
| 1346 | struct binder_buffer_object *buffer_obj; |
| 1347 | binder_size_t *offp; |
| 1348 | |
| 1349 | if (index >= num_valid) |
| 1350 | return NULL; |
| 1351 | |
| 1352 | offp = start + index; |
| 1353 | buffer_obj = (struct binder_buffer_object *)(b->data + *offp); |
| 1354 | if (buffer_obj->hdr.type != BINDER_TYPE_PTR) |
| 1355 | return NULL; |
| 1356 | |
| 1357 | return buffer_obj; |
| 1358 | } |
| 1359 | |
| 1360 | /** |
| 1361 | * binder_validate_fixup() - validates pointer/fd fixups happen in order. |
| 1362 | * @b: transaction buffer |
| 1363 | * @objects_start start of objects buffer |
| 1364 | * @buffer: binder_buffer_object in which to fix up |
| 1365 | * @offset: start offset in @buffer to fix up |
| 1366 | * @last_obj: last binder_buffer_object that we fixed up in |
| 1367 | * @last_min_offset: minimum fixup offset in @last_obj |
| 1368 | * |
| 1369 | * Return: %true if a fixup in buffer @buffer at offset @offset is |
| 1370 | * allowed. |
| 1371 | * |
| 1372 | * For safety reasons, we only allow fixups inside a buffer to happen |
| 1373 | * at increasing offsets; additionally, we only allow fixup on the last |
| 1374 | * buffer object that was verified, or one of its parents. |
| 1375 | * |
| 1376 | * Example of what is allowed: |
| 1377 | * |
| 1378 | * A |
| 1379 | * B (parent = A, offset = 0) |
| 1380 | * C (parent = A, offset = 16) |
| 1381 | * D (parent = C, offset = 0) |
| 1382 | * E (parent = A, offset = 32) // min_offset is 16 (C.parent_offset) |
| 1383 | * |
| 1384 | * Examples of what is not allowed: |
| 1385 | * |
| 1386 | * Decreasing offsets within the same parent: |
| 1387 | * A |
| 1388 | * C (parent = A, offset = 16) |
| 1389 | * B (parent = A, offset = 0) // decreasing offset within A |
| 1390 | * |
| 1391 | * Referring to a parent that wasn't the last object or any of its parents: |
| 1392 | * A |
| 1393 | * B (parent = A, offset = 0) |
| 1394 | * C (parent = A, offset = 0) |
| 1395 | * C (parent = A, offset = 16) |
| 1396 | * D (parent = B, offset = 0) // B is not A or any of A's parents |
| 1397 | */ |
| 1398 | static bool binder_validate_fixup(struct binder_buffer *b, |
| 1399 | binder_size_t *objects_start, |
| 1400 | struct binder_buffer_object *buffer, |
| 1401 | binder_size_t fixup_offset, |
| 1402 | struct binder_buffer_object *last_obj, |
| 1403 | binder_size_t last_min_offset) |
| 1404 | { |
| 1405 | if (!last_obj) { |
| 1406 | /* Nothing to fix up in */ |
| 1407 | return false; |
| 1408 | } |
| 1409 | |
| 1410 | while (last_obj != buffer) { |
| 1411 | /* |
| 1412 | * Safe to retrieve the parent of last_obj, since it |
| 1413 | * was already previously verified by the driver. |
| 1414 | */ |
| 1415 | if ((last_obj->flags & BINDER_BUFFER_FLAG_HAS_PARENT) == 0) |
| 1416 | return false; |
| 1417 | last_min_offset = last_obj->parent_offset + sizeof(uintptr_t); |
| 1418 | last_obj = (struct binder_buffer_object *) |
| 1419 | (b->data + *(objects_start + last_obj->parent)); |
| 1420 | } |
| 1421 | return (fixup_offset >= last_min_offset); |
| 1422 | } |
| 1423 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1424 | static void binder_transaction_buffer_release(struct binder_proc *proc, |
| 1425 | struct binder_buffer *buffer, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1426 | binder_size_t *failed_at) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1427 | { |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1428 | binder_size_t *offp, *off_start, *off_end; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1429 | int debug_id = buffer->debug_id; |
| 1430 | |
| 1431 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1432 | "%d buffer release %d, size %zd-%zd, failed at %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1433 | proc->pid, buffer->debug_id, |
| 1434 | buffer->data_size, buffer->offsets_size, failed_at); |
| 1435 | |
| 1436 | if (buffer->target_node) |
| 1437 | binder_dec_node(buffer->target_node, 1, 0); |
| 1438 | |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1439 | off_start = (binder_size_t *)(buffer->data + |
| 1440 | ALIGN(buffer->data_size, sizeof(void *))); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1441 | if (failed_at) |
| 1442 | off_end = failed_at; |
| 1443 | else |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1444 | off_end = (void *)off_start + buffer->offsets_size; |
| 1445 | for (offp = off_start; offp < off_end; offp++) { |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1446 | struct binder_object_header *hdr; |
| 1447 | size_t object_size = binder_validate_object(buffer, *offp); |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1448 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1449 | if (object_size == 0) { |
| 1450 | pr_err("transaction release %d bad object at offset %lld, size %zd\n", |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1451 | debug_id, (u64)*offp, buffer->data_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1452 | continue; |
| 1453 | } |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1454 | hdr = (struct binder_object_header *)(buffer->data + *offp); |
| 1455 | switch (hdr->type) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1456 | case BINDER_TYPE_BINDER: |
| 1457 | case BINDER_TYPE_WEAK_BINDER: { |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1458 | struct flat_binder_object *fp; |
| 1459 | struct binder_node *node; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1460 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1461 | fp = to_flat_binder_object(hdr); |
| 1462 | node = binder_get_node(proc, fp->binder); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1463 | if (node == NULL) { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1464 | pr_err("transaction release %d bad node %016llx\n", |
| 1465 | debug_id, (u64)fp->binder); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1466 | break; |
| 1467 | } |
| 1468 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1469 | " node %d u%016llx\n", |
| 1470 | node->debug_id, (u64)node->ptr); |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1471 | binder_dec_node(node, hdr->type == BINDER_TYPE_BINDER, |
| 1472 | 0); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1473 | } break; |
| 1474 | case BINDER_TYPE_HANDLE: |
| 1475 | case BINDER_TYPE_WEAK_HANDLE: { |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1476 | struct flat_binder_object *fp; |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1477 | struct binder_ref *ref; |
| 1478 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1479 | fp = to_flat_binder_object(hdr); |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1480 | ref = binder_get_ref(proc, fp->handle, |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1481 | hdr->type == BINDER_TYPE_HANDLE); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1482 | if (ref == NULL) { |
Serban Constantinescu | 64dcfe6 | 2013-07-04 10:54:48 +0100 | [diff] [blame] | 1483 | pr_err("transaction release %d bad handle %d\n", |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1484 | debug_id, fp->handle); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1485 | break; |
| 1486 | } |
| 1487 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1488 | " ref %d desc %d (node %d)\n", |
| 1489 | ref->debug_id, ref->desc, ref->node->debug_id); |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1490 | binder_dec_ref(ref, hdr->type == BINDER_TYPE_HANDLE); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1491 | } break; |
| 1492 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1493 | case BINDER_TYPE_FD: { |
| 1494 | struct binder_fd_object *fp = to_binder_fd_object(hdr); |
| 1495 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1496 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1497 | " fd %d\n", fp->fd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1498 | if (failed_at) |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1499 | task_close_fd(proc, fp->fd); |
| 1500 | } break; |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1501 | case BINDER_TYPE_PTR: |
| 1502 | /* |
| 1503 | * Nothing to do here, this will get cleaned up when the |
| 1504 | * transaction buffer gets freed |
| 1505 | */ |
| 1506 | break; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1507 | default: |
Serban Constantinescu | 64dcfe6 | 2013-07-04 10:54:48 +0100 | [diff] [blame] | 1508 | pr_err("transaction release %d bad object type %x\n", |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1509 | debug_id, hdr->type); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1510 | break; |
| 1511 | } |
| 1512 | } |
| 1513 | } |
| 1514 | |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 1515 | static int binder_translate_binder(struct flat_binder_object *fp, |
| 1516 | struct binder_transaction *t, |
| 1517 | struct binder_thread *thread) |
| 1518 | { |
| 1519 | struct binder_node *node; |
| 1520 | struct binder_ref *ref; |
| 1521 | struct binder_proc *proc = thread->proc; |
| 1522 | struct binder_proc *target_proc = t->to_proc; |
| 1523 | |
| 1524 | node = binder_get_node(proc, fp->binder); |
| 1525 | if (!node) { |
| 1526 | node = binder_new_node(proc, fp->binder, fp->cookie); |
| 1527 | if (!node) |
| 1528 | return -ENOMEM; |
| 1529 | |
| 1530 | node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK; |
| 1531 | node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS); |
| 1532 | } |
| 1533 | if (fp->cookie != node->cookie) { |
| 1534 | binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n", |
| 1535 | proc->pid, thread->pid, (u64)fp->binder, |
| 1536 | node->debug_id, (u64)fp->cookie, |
| 1537 | (u64)node->cookie); |
| 1538 | return -EINVAL; |
| 1539 | } |
| 1540 | if (security_binder_transfer_binder(proc->tsk, target_proc->tsk)) |
| 1541 | return -EPERM; |
| 1542 | |
| 1543 | ref = binder_get_ref_for_node(target_proc, node); |
| 1544 | if (!ref) |
| 1545 | return -EINVAL; |
| 1546 | |
| 1547 | if (fp->hdr.type == BINDER_TYPE_BINDER) |
| 1548 | fp->hdr.type = BINDER_TYPE_HANDLE; |
| 1549 | else |
| 1550 | fp->hdr.type = BINDER_TYPE_WEAK_HANDLE; |
| 1551 | fp->binder = 0; |
| 1552 | fp->handle = ref->desc; |
| 1553 | fp->cookie = 0; |
| 1554 | binder_inc_ref(ref, fp->hdr.type == BINDER_TYPE_HANDLE, &thread->todo); |
| 1555 | |
| 1556 | trace_binder_transaction_node_to_ref(t, node, ref); |
| 1557 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1558 | " node %d u%016llx -> ref %d desc %d\n", |
| 1559 | node->debug_id, (u64)node->ptr, |
| 1560 | ref->debug_id, ref->desc); |
| 1561 | |
| 1562 | return 0; |
| 1563 | } |
| 1564 | |
| 1565 | static int binder_translate_handle(struct flat_binder_object *fp, |
| 1566 | struct binder_transaction *t, |
| 1567 | struct binder_thread *thread) |
| 1568 | { |
| 1569 | struct binder_ref *ref; |
| 1570 | struct binder_proc *proc = thread->proc; |
| 1571 | struct binder_proc *target_proc = t->to_proc; |
| 1572 | |
| 1573 | ref = binder_get_ref(proc, fp->handle, |
| 1574 | fp->hdr.type == BINDER_TYPE_HANDLE); |
| 1575 | if (!ref) { |
| 1576 | binder_user_error("%d:%d got transaction with invalid handle, %d\n", |
| 1577 | proc->pid, thread->pid, fp->handle); |
| 1578 | return -EINVAL; |
| 1579 | } |
| 1580 | if (security_binder_transfer_binder(proc->tsk, target_proc->tsk)) |
| 1581 | return -EPERM; |
| 1582 | |
| 1583 | if (ref->node->proc == target_proc) { |
| 1584 | if (fp->hdr.type == BINDER_TYPE_HANDLE) |
| 1585 | fp->hdr.type = BINDER_TYPE_BINDER; |
| 1586 | else |
| 1587 | fp->hdr.type = BINDER_TYPE_WEAK_BINDER; |
| 1588 | fp->binder = ref->node->ptr; |
| 1589 | fp->cookie = ref->node->cookie; |
| 1590 | binder_inc_node(ref->node, fp->hdr.type == BINDER_TYPE_BINDER, |
| 1591 | 0, NULL); |
| 1592 | trace_binder_transaction_ref_to_node(t, ref); |
| 1593 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1594 | " ref %d desc %d -> node %d u%016llx\n", |
| 1595 | ref->debug_id, ref->desc, ref->node->debug_id, |
| 1596 | (u64)ref->node->ptr); |
| 1597 | } else { |
| 1598 | struct binder_ref *new_ref; |
| 1599 | |
| 1600 | new_ref = binder_get_ref_for_node(target_proc, ref->node); |
| 1601 | if (!new_ref) |
| 1602 | return -EINVAL; |
| 1603 | |
| 1604 | fp->binder = 0; |
| 1605 | fp->handle = new_ref->desc; |
| 1606 | fp->cookie = 0; |
| 1607 | binder_inc_ref(new_ref, fp->hdr.type == BINDER_TYPE_HANDLE, |
| 1608 | NULL); |
| 1609 | trace_binder_transaction_ref_to_ref(t, ref, new_ref); |
| 1610 | binder_debug(BINDER_DEBUG_TRANSACTION, |
| 1611 | " ref %d desc %d -> ref %d desc %d (node %d)\n", |
| 1612 | ref->debug_id, ref->desc, new_ref->debug_id, |
| 1613 | new_ref->desc, ref->node->debug_id); |
| 1614 | } |
| 1615 | return 0; |
| 1616 | } |
| 1617 | |
| 1618 | static int binder_translate_fd(int fd, |
| 1619 | struct binder_transaction *t, |
| 1620 | struct binder_thread *thread, |
| 1621 | struct binder_transaction *in_reply_to) |
| 1622 | { |
| 1623 | struct binder_proc *proc = thread->proc; |
| 1624 | struct binder_proc *target_proc = t->to_proc; |
| 1625 | int target_fd; |
| 1626 | struct file *file; |
| 1627 | int ret; |
| 1628 | bool target_allows_fd; |
| 1629 | |
| 1630 | if (in_reply_to) |
| 1631 | target_allows_fd = !!(in_reply_to->flags & TF_ACCEPT_FDS); |
| 1632 | else |
| 1633 | target_allows_fd = t->buffer->target_node->accept_fds; |
| 1634 | if (!target_allows_fd) { |
| 1635 | binder_user_error("%d:%d got %s with fd, %d, but target does not allow fds\n", |
| 1636 | proc->pid, thread->pid, |
| 1637 | in_reply_to ? "reply" : "transaction", |
| 1638 | fd); |
| 1639 | ret = -EPERM; |
| 1640 | goto err_fd_not_accepted; |
| 1641 | } |
| 1642 | |
| 1643 | file = fget(fd); |
| 1644 | if (!file) { |
| 1645 | binder_user_error("%d:%d got transaction with invalid fd, %d\n", |
| 1646 | proc->pid, thread->pid, fd); |
| 1647 | ret = -EBADF; |
| 1648 | goto err_fget; |
| 1649 | } |
| 1650 | ret = security_binder_transfer_file(proc->tsk, target_proc->tsk, file); |
| 1651 | if (ret < 0) { |
| 1652 | ret = -EPERM; |
| 1653 | goto err_security; |
| 1654 | } |
| 1655 | |
| 1656 | target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC); |
| 1657 | if (target_fd < 0) { |
| 1658 | ret = -ENOMEM; |
| 1659 | goto err_get_unused_fd; |
| 1660 | } |
| 1661 | task_fd_install(target_proc, target_fd, file); |
| 1662 | trace_binder_transaction_fd(t, fd, target_fd); |
| 1663 | binder_debug(BINDER_DEBUG_TRANSACTION, " fd %d -> %d\n", |
| 1664 | fd, target_fd); |
| 1665 | |
| 1666 | return target_fd; |
| 1667 | |
| 1668 | err_get_unused_fd: |
| 1669 | err_security: |
| 1670 | fput(file); |
| 1671 | err_fget: |
| 1672 | err_fd_not_accepted: |
| 1673 | return ret; |
| 1674 | } |
| 1675 | |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1676 | static int binder_fixup_parent(struct binder_transaction *t, |
| 1677 | struct binder_thread *thread, |
| 1678 | struct binder_buffer_object *bp, |
| 1679 | binder_size_t *off_start, |
| 1680 | binder_size_t num_valid, |
| 1681 | struct binder_buffer_object *last_fixup_obj, |
| 1682 | binder_size_t last_fixup_min_off) |
| 1683 | { |
| 1684 | struct binder_buffer_object *parent; |
| 1685 | u8 *parent_buffer; |
| 1686 | struct binder_buffer *b = t->buffer; |
| 1687 | struct binder_proc *proc = thread->proc; |
| 1688 | struct binder_proc *target_proc = t->to_proc; |
| 1689 | |
| 1690 | if (!(bp->flags & BINDER_BUFFER_FLAG_HAS_PARENT)) |
| 1691 | return 0; |
| 1692 | |
| 1693 | parent = binder_validate_ptr(b, bp->parent, off_start, num_valid); |
| 1694 | if (!parent) { |
| 1695 | binder_user_error("%d:%d got transaction with invalid parent offset or type\n", |
| 1696 | proc->pid, thread->pid); |
| 1697 | return -EINVAL; |
| 1698 | } |
| 1699 | |
| 1700 | if (!binder_validate_fixup(b, off_start, |
| 1701 | parent, bp->parent_offset, |
| 1702 | last_fixup_obj, |
| 1703 | last_fixup_min_off)) { |
| 1704 | binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n", |
| 1705 | proc->pid, thread->pid); |
| 1706 | return -EINVAL; |
| 1707 | } |
| 1708 | |
| 1709 | if (parent->length < sizeof(binder_uintptr_t) || |
| 1710 | bp->parent_offset > parent->length - sizeof(binder_uintptr_t)) { |
| 1711 | /* No space for a pointer here! */ |
| 1712 | binder_user_error("%d:%d got transaction with invalid parent offset\n", |
| 1713 | proc->pid, thread->pid); |
| 1714 | return -EINVAL; |
| 1715 | } |
| 1716 | parent_buffer = (u8 *)(parent->buffer - |
| 1717 | target_proc->user_buffer_offset); |
| 1718 | *(binder_uintptr_t *)(parent_buffer + bp->parent_offset) = bp->buffer; |
| 1719 | |
| 1720 | return 0; |
| 1721 | } |
| 1722 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1723 | static void binder_transaction(struct binder_proc *proc, |
| 1724 | struct binder_thread *thread, |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 1725 | struct binder_transaction_data *tr, int reply, |
| 1726 | binder_size_t extra_buffers_size) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1727 | { |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 1728 | int ret; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1729 | struct binder_transaction *t; |
| 1730 | struct binder_work *tcomplete; |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1731 | binder_size_t *offp, *off_end, *off_start; |
Arve Hjønnevåg | 212265e | 2016-02-09 21:05:32 -0800 | [diff] [blame] | 1732 | binder_size_t off_min; |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1733 | u8 *sg_bufp, *sg_buf_end; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1734 | struct binder_proc *target_proc; |
| 1735 | struct binder_thread *target_thread = NULL; |
| 1736 | struct binder_node *target_node = NULL; |
| 1737 | struct list_head *target_list; |
| 1738 | wait_queue_head_t *target_wait; |
| 1739 | struct binder_transaction *in_reply_to = NULL; |
| 1740 | struct binder_transaction_log_entry *e; |
| 1741 | uint32_t return_error; |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1742 | struct binder_buffer_object *last_fixup_obj = NULL; |
| 1743 | binder_size_t last_fixup_min_off = 0; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 1744 | struct binder_context *context = proc->context; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1745 | |
| 1746 | e = binder_transaction_log_add(&binder_transaction_log); |
| 1747 | e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY); |
| 1748 | e->from_proc = proc->pid; |
| 1749 | e->from_thread = thread->pid; |
| 1750 | e->target_handle = tr->target.handle; |
| 1751 | e->data_size = tr->data_size; |
| 1752 | e->offsets_size = tr->offsets_size; |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 1753 | e->context_name = proc->context->name; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1754 | |
| 1755 | if (reply) { |
| 1756 | in_reply_to = thread->transaction_stack; |
| 1757 | if (in_reply_to == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1758 | 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] | 1759 | proc->pid, thread->pid); |
| 1760 | return_error = BR_FAILED_REPLY; |
| 1761 | goto err_empty_call_stack; |
| 1762 | } |
| 1763 | binder_set_nice(in_reply_to->saved_priority); |
| 1764 | if (in_reply_to->to_thread != thread) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1765 | 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] | 1766 | proc->pid, thread->pid, in_reply_to->debug_id, |
| 1767 | in_reply_to->to_proc ? |
| 1768 | in_reply_to->to_proc->pid : 0, |
| 1769 | in_reply_to->to_thread ? |
| 1770 | in_reply_to->to_thread->pid : 0); |
| 1771 | return_error = BR_FAILED_REPLY; |
| 1772 | in_reply_to = NULL; |
| 1773 | goto err_bad_call_stack; |
| 1774 | } |
| 1775 | thread->transaction_stack = in_reply_to->to_parent; |
| 1776 | target_thread = in_reply_to->from; |
| 1777 | if (target_thread == NULL) { |
| 1778 | return_error = BR_DEAD_REPLY; |
| 1779 | goto err_dead_binder; |
| 1780 | } |
| 1781 | if (target_thread->transaction_stack != in_reply_to) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1782 | 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] | 1783 | proc->pid, thread->pid, |
| 1784 | target_thread->transaction_stack ? |
| 1785 | target_thread->transaction_stack->debug_id : 0, |
| 1786 | in_reply_to->debug_id); |
| 1787 | return_error = BR_FAILED_REPLY; |
| 1788 | in_reply_to = NULL; |
| 1789 | target_thread = NULL; |
| 1790 | goto err_dead_binder; |
| 1791 | } |
| 1792 | target_proc = target_thread->proc; |
| 1793 | } else { |
| 1794 | if (tr->target.handle) { |
| 1795 | struct binder_ref *ref; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1796 | |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1797 | ref = binder_get_ref(proc, tr->target.handle, true); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1798 | if (ref == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1799 | binder_user_error("%d:%d got transaction to invalid handle\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1800 | proc->pid, thread->pid); |
| 1801 | return_error = BR_FAILED_REPLY; |
| 1802 | goto err_invalid_target_handle; |
| 1803 | } |
| 1804 | target_node = ref->node; |
| 1805 | } else { |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 1806 | target_node = context->binder_context_mgr_node; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1807 | if (target_node == NULL) { |
| 1808 | return_error = BR_DEAD_REPLY; |
| 1809 | goto err_no_context_mgr_node; |
| 1810 | } |
| 1811 | } |
| 1812 | e->to_node = target_node->debug_id; |
| 1813 | target_proc = target_node->proc; |
| 1814 | if (target_proc == NULL) { |
| 1815 | return_error = BR_DEAD_REPLY; |
| 1816 | goto err_dead_binder; |
| 1817 | } |
Stephen Smalley | 79af730 | 2015-01-21 10:54:10 -0500 | [diff] [blame] | 1818 | if (security_binder_transaction(proc->tsk, |
| 1819 | target_proc->tsk) < 0) { |
| 1820 | return_error = BR_FAILED_REPLY; |
| 1821 | goto err_invalid_target_handle; |
| 1822 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1823 | if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) { |
| 1824 | struct binder_transaction *tmp; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1825 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1826 | tmp = thread->transaction_stack; |
| 1827 | if (tmp->to_thread != thread) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1828 | 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] | 1829 | proc->pid, thread->pid, tmp->debug_id, |
| 1830 | tmp->to_proc ? tmp->to_proc->pid : 0, |
| 1831 | tmp->to_thread ? |
| 1832 | tmp->to_thread->pid : 0); |
| 1833 | return_error = BR_FAILED_REPLY; |
| 1834 | goto err_bad_call_stack; |
| 1835 | } |
| 1836 | while (tmp) { |
| 1837 | if (tmp->from && tmp->from->proc == target_proc) |
| 1838 | target_thread = tmp->from; |
| 1839 | tmp = tmp->from_parent; |
| 1840 | } |
| 1841 | } |
| 1842 | } |
| 1843 | if (target_thread) { |
| 1844 | e->to_thread = target_thread->pid; |
| 1845 | target_list = &target_thread->todo; |
| 1846 | target_wait = &target_thread->wait; |
| 1847 | } else { |
| 1848 | target_list = &target_proc->todo; |
| 1849 | target_wait = &target_proc->wait; |
| 1850 | } |
| 1851 | e->to_proc = target_proc->pid; |
| 1852 | |
| 1853 | /* TODO: reuse incoming transaction for reply */ |
| 1854 | t = kzalloc(sizeof(*t), GFP_KERNEL); |
| 1855 | if (t == NULL) { |
| 1856 | return_error = BR_FAILED_REPLY; |
| 1857 | goto err_alloc_t_failed; |
| 1858 | } |
| 1859 | binder_stats_created(BINDER_STAT_TRANSACTION); |
| 1860 | |
| 1861 | tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL); |
| 1862 | if (tcomplete == NULL) { |
| 1863 | return_error = BR_FAILED_REPLY; |
| 1864 | goto err_alloc_tcomplete_failed; |
| 1865 | } |
| 1866 | binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE); |
| 1867 | |
| 1868 | t->debug_id = ++binder_last_id; |
| 1869 | e->debug_id = t->debug_id; |
| 1870 | |
| 1871 | if (reply) |
| 1872 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 1873 | "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld-%lld\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1874 | proc->pid, thread->pid, t->debug_id, |
| 1875 | target_proc->pid, target_thread->pid, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1876 | (u64)tr->data.ptr.buffer, |
| 1877 | (u64)tr->data.ptr.offsets, |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 1878 | (u64)tr->data_size, (u64)tr->offsets_size, |
| 1879 | (u64)extra_buffers_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1880 | else |
| 1881 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 1882 | "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld-%lld\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1883 | proc->pid, thread->pid, t->debug_id, |
| 1884 | target_proc->pid, target_node->debug_id, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1885 | (u64)tr->data.ptr.buffer, |
| 1886 | (u64)tr->data.ptr.offsets, |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 1887 | (u64)tr->data_size, (u64)tr->offsets_size, |
| 1888 | (u64)extra_buffers_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1889 | |
| 1890 | if (!reply && !(tr->flags & TF_ONE_WAY)) |
| 1891 | t->from = thread; |
| 1892 | else |
| 1893 | t->from = NULL; |
Tair Rzayev | 57bab7c | 2014-05-31 22:43:34 +0300 | [diff] [blame] | 1894 | t->sender_euid = task_euid(proc->tsk); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1895 | t->to_proc = target_proc; |
| 1896 | t->to_thread = target_thread; |
| 1897 | t->code = tr->code; |
| 1898 | t->flags = tr->flags; |
| 1899 | t->priority = task_nice(current); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1900 | |
| 1901 | trace_binder_transaction(reply, t, target_node); |
| 1902 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1903 | t->buffer = binder_alloc_buf(target_proc, tr->data_size, |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 1904 | tr->offsets_size, extra_buffers_size, |
| 1905 | !reply && (t->flags & TF_ONE_WAY)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1906 | if (t->buffer == NULL) { |
| 1907 | return_error = BR_FAILED_REPLY; |
| 1908 | goto err_binder_alloc_buf_failed; |
| 1909 | } |
| 1910 | t->buffer->allow_user_free = 0; |
| 1911 | t->buffer->debug_id = t->debug_id; |
| 1912 | t->buffer->transaction = t; |
| 1913 | t->buffer->target_node = target_node; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 1914 | trace_binder_transaction_alloc_buf(t->buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1915 | if (target_node) |
| 1916 | binder_inc_node(target_node, 1, 0, NULL); |
| 1917 | |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1918 | off_start = (binder_size_t *)(t->buffer->data + |
| 1919 | ALIGN(tr->data_size, sizeof(void *))); |
| 1920 | offp = off_start; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1921 | |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1922 | if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t) |
| 1923 | tr->data.ptr.buffer, tr->data_size)) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1924 | binder_user_error("%d:%d got transaction with invalid data ptr\n", |
| 1925 | proc->pid, thread->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1926 | return_error = BR_FAILED_REPLY; |
| 1927 | goto err_copy_data_failed; |
| 1928 | } |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1929 | if (copy_from_user(offp, (const void __user *)(uintptr_t) |
| 1930 | tr->data.ptr.offsets, tr->offsets_size)) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 1931 | binder_user_error("%d:%d got transaction with invalid offsets ptr\n", |
| 1932 | proc->pid, thread->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1933 | return_error = BR_FAILED_REPLY; |
| 1934 | goto err_copy_data_failed; |
| 1935 | } |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 1936 | if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) { |
| 1937 | binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n", |
| 1938 | proc->pid, thread->pid, (u64)tr->offsets_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1939 | return_error = BR_FAILED_REPLY; |
| 1940 | goto err_bad_offset; |
| 1941 | } |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 1942 | if (!IS_ALIGNED(extra_buffers_size, sizeof(u64))) { |
| 1943 | binder_user_error("%d:%d got transaction with unaligned buffers size, %lld\n", |
| 1944 | proc->pid, thread->pid, |
| 1945 | extra_buffers_size); |
| 1946 | return_error = BR_FAILED_REPLY; |
| 1947 | goto err_bad_offset; |
| 1948 | } |
| 1949 | off_end = (void *)off_start + tr->offsets_size; |
| 1950 | sg_bufp = (u8 *)(PTR_ALIGN(off_end, sizeof(void *))); |
| 1951 | sg_buf_end = sg_bufp + extra_buffers_size; |
Arve Hjønnevåg | 212265e | 2016-02-09 21:05:32 -0800 | [diff] [blame] | 1952 | off_min = 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1953 | for (; offp < off_end; offp++) { |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1954 | struct binder_object_header *hdr; |
| 1955 | size_t object_size = binder_validate_object(t->buffer, *offp); |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1956 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1957 | if (object_size == 0 || *offp < off_min) { |
| 1958 | binder_user_error("%d:%d got transaction with invalid offset (%lld, min %lld max %lld) or object.\n", |
Arve Hjønnevåg | 212265e | 2016-02-09 21:05:32 -0800 | [diff] [blame] | 1959 | proc->pid, thread->pid, (u64)*offp, |
| 1960 | (u64)off_min, |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1961 | (u64)t->buffer->data_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1962 | return_error = BR_FAILED_REPLY; |
| 1963 | goto err_bad_offset; |
| 1964 | } |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1965 | |
| 1966 | hdr = (struct binder_object_header *)(t->buffer->data + *offp); |
| 1967 | off_min = *offp + object_size; |
| 1968 | switch (hdr->type) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1969 | case BINDER_TYPE_BINDER: |
| 1970 | case BINDER_TYPE_WEAK_BINDER: { |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1971 | struct flat_binder_object *fp; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 1972 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1973 | fp = to_flat_binder_object(hdr); |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 1974 | ret = binder_translate_binder(fp, t, thread); |
| 1975 | if (ret < 0) { |
Christian Engelmayer | 7d42043 | 2014-05-07 21:44:53 +0200 | [diff] [blame] | 1976 | return_error = BR_FAILED_REPLY; |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 1977 | goto err_translate_failed; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1978 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1979 | } break; |
| 1980 | case BINDER_TYPE_HANDLE: |
| 1981 | case BINDER_TYPE_WEAK_HANDLE: { |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1982 | struct flat_binder_object *fp; |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 1983 | |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1984 | fp = to_flat_binder_object(hdr); |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 1985 | ret = binder_translate_handle(fp, t, thread); |
| 1986 | if (ret < 0) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1987 | return_error = BR_FAILED_REPLY; |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 1988 | goto err_translate_failed; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1989 | } |
| 1990 | } break; |
| 1991 | |
| 1992 | case BINDER_TYPE_FD: { |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 1993 | struct binder_fd_object *fp = to_binder_fd_object(hdr); |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 1994 | int target_fd = binder_translate_fd(fp->fd, t, thread, |
| 1995 | in_reply_to); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1996 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1997 | if (target_fd < 0) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 1998 | return_error = BR_FAILED_REPLY; |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 1999 | goto err_translate_failed; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2000 | } |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 2001 | fp->pad_binder = 0; |
| 2002 | fp->fd = target_fd; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2003 | } break; |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 2004 | case BINDER_TYPE_PTR: { |
| 2005 | struct binder_buffer_object *bp = |
| 2006 | to_binder_buffer_object(hdr); |
| 2007 | size_t buf_left = sg_buf_end - sg_bufp; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2008 | |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 2009 | if (bp->length > buf_left) { |
| 2010 | binder_user_error("%d:%d got transaction with too large buffer\n", |
| 2011 | proc->pid, thread->pid); |
| 2012 | return_error = BR_FAILED_REPLY; |
| 2013 | goto err_bad_offset; |
| 2014 | } |
| 2015 | if (copy_from_user(sg_bufp, |
| 2016 | (const void __user *)(uintptr_t) |
| 2017 | bp->buffer, bp->length)) { |
| 2018 | binder_user_error("%d:%d got transaction with invalid offsets ptr\n", |
| 2019 | proc->pid, thread->pid); |
| 2020 | return_error = BR_FAILED_REPLY; |
| 2021 | goto err_copy_data_failed; |
| 2022 | } |
| 2023 | /* Fixup buffer pointer to target proc address space */ |
| 2024 | bp->buffer = (uintptr_t)sg_bufp + |
| 2025 | target_proc->user_buffer_offset; |
| 2026 | sg_bufp += ALIGN(bp->length, sizeof(u64)); |
| 2027 | |
| 2028 | ret = binder_fixup_parent(t, thread, bp, off_start, |
| 2029 | offp - off_start, |
| 2030 | last_fixup_obj, |
| 2031 | last_fixup_min_off); |
| 2032 | if (ret < 0) { |
| 2033 | return_error = BR_FAILED_REPLY; |
| 2034 | goto err_translate_failed; |
| 2035 | } |
| 2036 | last_fixup_obj = bp; |
| 2037 | last_fixup_min_off = 0; |
| 2038 | } break; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2039 | default: |
Serban Constantinescu | 64dcfe6 | 2013-07-04 10:54:48 +0100 | [diff] [blame] | 2040 | binder_user_error("%d:%d got transaction with invalid object type, %x\n", |
Martijn Coenen | 00c8037 | 2016-07-13 12:06:49 +0200 | [diff] [blame] | 2041 | proc->pid, thread->pid, hdr->type); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2042 | return_error = BR_FAILED_REPLY; |
| 2043 | goto err_bad_object_type; |
| 2044 | } |
| 2045 | } |
| 2046 | if (reply) { |
| 2047 | BUG_ON(t->buffer->async_transaction != 0); |
| 2048 | binder_pop_transaction(target_thread, in_reply_to); |
| 2049 | } else if (!(t->flags & TF_ONE_WAY)) { |
| 2050 | BUG_ON(t->buffer->async_transaction != 0); |
| 2051 | t->need_reply = 1; |
| 2052 | t->from_parent = thread->transaction_stack; |
| 2053 | thread->transaction_stack = t; |
| 2054 | } else { |
| 2055 | BUG_ON(target_node == NULL); |
| 2056 | BUG_ON(t->buffer->async_transaction != 1); |
| 2057 | if (target_node->has_async_transaction) { |
| 2058 | target_list = &target_node->async_todo; |
| 2059 | target_wait = NULL; |
| 2060 | } else |
| 2061 | target_node->has_async_transaction = 1; |
| 2062 | } |
| 2063 | t->work.type = BINDER_WORK_TRANSACTION; |
| 2064 | list_add_tail(&t->work.entry, target_list); |
| 2065 | tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE; |
| 2066 | list_add_tail(&tcomplete->entry, &thread->todo); |
| 2067 | if (target_wait) |
| 2068 | wake_up_interruptible(target_wait); |
| 2069 | return; |
| 2070 | |
Martijn Coenen | d82cb8b | 2016-09-29 15:38:14 +0200 | [diff] [blame] | 2071 | err_translate_failed: |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2072 | err_bad_object_type: |
| 2073 | err_bad_offset: |
| 2074 | err_copy_data_failed: |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2075 | trace_binder_transaction_failed_buffer_release(t->buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2076 | binder_transaction_buffer_release(target_proc, t->buffer, offp); |
| 2077 | t->buffer->transaction = NULL; |
| 2078 | binder_free_buf(target_proc, t->buffer); |
| 2079 | err_binder_alloc_buf_failed: |
| 2080 | kfree(tcomplete); |
| 2081 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 2082 | err_alloc_tcomplete_failed: |
| 2083 | kfree(t); |
| 2084 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 2085 | err_alloc_t_failed: |
| 2086 | err_bad_call_stack: |
| 2087 | err_empty_call_stack: |
| 2088 | err_dead_binder: |
| 2089 | err_invalid_target_handle: |
| 2090 | err_no_context_mgr_node: |
| 2091 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2092 | "%d:%d transaction failed %d, size %lld-%lld\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2093 | proc->pid, thread->pid, return_error, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2094 | (u64)tr->data_size, (u64)tr->offsets_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2095 | |
| 2096 | { |
| 2097 | struct binder_transaction_log_entry *fe; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 2098 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2099 | fe = binder_transaction_log_add(&binder_transaction_log_failed); |
| 2100 | *fe = *e; |
| 2101 | } |
| 2102 | |
| 2103 | BUG_ON(thread->return_error != BR_OK); |
| 2104 | if (in_reply_to) { |
| 2105 | thread->return_error = BR_TRANSACTION_COMPLETE; |
| 2106 | binder_send_failed_reply(in_reply_to, return_error); |
| 2107 | } else |
| 2108 | thread->return_error = return_error; |
| 2109 | } |
| 2110 | |
Bojan Prtvar | fb07ebc | 2013-09-02 08:18:40 +0200 | [diff] [blame] | 2111 | static int binder_thread_write(struct binder_proc *proc, |
| 2112 | struct binder_thread *thread, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2113 | binder_uintptr_t binder_buffer, size_t size, |
| 2114 | binder_size_t *consumed) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2115 | { |
| 2116 | uint32_t cmd; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 2117 | struct binder_context *context = proc->context; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2118 | void __user *buffer = (void __user *)(uintptr_t)binder_buffer; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2119 | void __user *ptr = buffer + *consumed; |
| 2120 | void __user *end = buffer + size; |
| 2121 | |
| 2122 | while (ptr < end && thread->return_error == BR_OK) { |
| 2123 | if (get_user(cmd, (uint32_t __user *)ptr)) |
| 2124 | return -EFAULT; |
| 2125 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2126 | trace_binder_command(cmd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2127 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) { |
| 2128 | binder_stats.bc[_IOC_NR(cmd)]++; |
| 2129 | proc->stats.bc[_IOC_NR(cmd)]++; |
| 2130 | thread->stats.bc[_IOC_NR(cmd)]++; |
| 2131 | } |
| 2132 | switch (cmd) { |
| 2133 | case BC_INCREFS: |
| 2134 | case BC_ACQUIRE: |
| 2135 | case BC_RELEASE: |
| 2136 | case BC_DECREFS: { |
| 2137 | uint32_t target; |
| 2138 | struct binder_ref *ref; |
| 2139 | const char *debug_string; |
| 2140 | |
| 2141 | if (get_user(target, (uint32_t __user *)ptr)) |
| 2142 | return -EFAULT; |
| 2143 | ptr += sizeof(uint32_t); |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 2144 | if (target == 0 && context->binder_context_mgr_node && |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2145 | (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) { |
| 2146 | ref = binder_get_ref_for_node(proc, |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 2147 | context->binder_context_mgr_node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2148 | if (ref->desc != target) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2149 | 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] | 2150 | proc->pid, thread->pid, |
| 2151 | ref->desc); |
| 2152 | } |
| 2153 | } else |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 2154 | ref = binder_get_ref(proc, target, |
| 2155 | cmd == BC_ACQUIRE || |
| 2156 | cmd == BC_RELEASE); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2157 | if (ref == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2158 | 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] | 2159 | proc->pid, thread->pid, target); |
| 2160 | break; |
| 2161 | } |
| 2162 | switch (cmd) { |
| 2163 | case BC_INCREFS: |
| 2164 | debug_string = "IncRefs"; |
| 2165 | binder_inc_ref(ref, 0, NULL); |
| 2166 | break; |
| 2167 | case BC_ACQUIRE: |
| 2168 | debug_string = "Acquire"; |
| 2169 | binder_inc_ref(ref, 1, NULL); |
| 2170 | break; |
| 2171 | case BC_RELEASE: |
| 2172 | debug_string = "Release"; |
| 2173 | binder_dec_ref(ref, 1); |
| 2174 | break; |
| 2175 | case BC_DECREFS: |
| 2176 | default: |
| 2177 | debug_string = "DecRefs"; |
| 2178 | binder_dec_ref(ref, 0); |
| 2179 | break; |
| 2180 | } |
| 2181 | binder_debug(BINDER_DEBUG_USER_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2182 | "%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] | 2183 | proc->pid, thread->pid, debug_string, ref->debug_id, |
| 2184 | ref->desc, ref->strong, ref->weak, ref->node->debug_id); |
| 2185 | break; |
| 2186 | } |
| 2187 | case BC_INCREFS_DONE: |
| 2188 | case BC_ACQUIRE_DONE: { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2189 | binder_uintptr_t node_ptr; |
| 2190 | binder_uintptr_t cookie; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2191 | struct binder_node *node; |
| 2192 | |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2193 | if (get_user(node_ptr, (binder_uintptr_t __user *)ptr)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2194 | return -EFAULT; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2195 | ptr += sizeof(binder_uintptr_t); |
| 2196 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2197 | return -EFAULT; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2198 | ptr += sizeof(binder_uintptr_t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2199 | node = binder_get_node(proc, node_ptr); |
| 2200 | if (node == NULL) { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2201 | binder_user_error("%d:%d %s u%016llx no match\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2202 | proc->pid, thread->pid, |
| 2203 | cmd == BC_INCREFS_DONE ? |
| 2204 | "BC_INCREFS_DONE" : |
| 2205 | "BC_ACQUIRE_DONE", |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2206 | (u64)node_ptr); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2207 | break; |
| 2208 | } |
| 2209 | if (cookie != node->cookie) { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2210 | binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2211 | proc->pid, thread->pid, |
| 2212 | cmd == BC_INCREFS_DONE ? |
| 2213 | "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2214 | (u64)node_ptr, node->debug_id, |
| 2215 | (u64)cookie, (u64)node->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2216 | break; |
| 2217 | } |
| 2218 | if (cmd == BC_ACQUIRE_DONE) { |
| 2219 | if (node->pending_strong_ref == 0) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2220 | 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] | 2221 | proc->pid, thread->pid, |
| 2222 | node->debug_id); |
| 2223 | break; |
| 2224 | } |
| 2225 | node->pending_strong_ref = 0; |
| 2226 | } else { |
| 2227 | if (node->pending_weak_ref == 0) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2228 | 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] | 2229 | proc->pid, thread->pid, |
| 2230 | node->debug_id); |
| 2231 | break; |
| 2232 | } |
| 2233 | node->pending_weak_ref = 0; |
| 2234 | } |
| 2235 | binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0); |
| 2236 | binder_debug(BINDER_DEBUG_USER_REFS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2237 | "%d:%d %s node %d ls %d lw %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2238 | proc->pid, thread->pid, |
| 2239 | cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", |
| 2240 | node->debug_id, node->local_strong_refs, node->local_weak_refs); |
| 2241 | break; |
| 2242 | } |
| 2243 | case BC_ATTEMPT_ACQUIRE: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2244 | pr_err("BC_ATTEMPT_ACQUIRE not supported\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2245 | return -EINVAL; |
| 2246 | case BC_ACQUIRE_RESULT: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2247 | pr_err("BC_ACQUIRE_RESULT not supported\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2248 | return -EINVAL; |
| 2249 | |
| 2250 | case BC_FREE_BUFFER: { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2251 | binder_uintptr_t data_ptr; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2252 | struct binder_buffer *buffer; |
| 2253 | |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2254 | if (get_user(data_ptr, (binder_uintptr_t __user *)ptr)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2255 | return -EFAULT; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2256 | ptr += sizeof(binder_uintptr_t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2257 | |
| 2258 | buffer = binder_buffer_lookup(proc, data_ptr); |
| 2259 | if (buffer == NULL) { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2260 | binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n", |
| 2261 | proc->pid, thread->pid, (u64)data_ptr); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2262 | break; |
| 2263 | } |
| 2264 | if (!buffer->allow_user_free) { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2265 | binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n", |
| 2266 | proc->pid, thread->pid, (u64)data_ptr); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2267 | break; |
| 2268 | } |
| 2269 | binder_debug(BINDER_DEBUG_FREE_BUFFER, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2270 | "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n", |
| 2271 | proc->pid, thread->pid, (u64)data_ptr, |
| 2272 | buffer->debug_id, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2273 | buffer->transaction ? "active" : "finished"); |
| 2274 | |
| 2275 | if (buffer->transaction) { |
| 2276 | buffer->transaction->buffer = NULL; |
| 2277 | buffer->transaction = NULL; |
| 2278 | } |
| 2279 | if (buffer->async_transaction && buffer->target_node) { |
| 2280 | BUG_ON(!buffer->target_node->has_async_transaction); |
| 2281 | if (list_empty(&buffer->target_node->async_todo)) |
| 2282 | buffer->target_node->has_async_transaction = 0; |
| 2283 | else |
| 2284 | list_move_tail(buffer->target_node->async_todo.next, &thread->todo); |
| 2285 | } |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2286 | trace_binder_transaction_buffer_release(buffer); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2287 | binder_transaction_buffer_release(proc, buffer, NULL); |
| 2288 | binder_free_buf(proc, buffer); |
| 2289 | break; |
| 2290 | } |
| 2291 | |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 2292 | case BC_TRANSACTION_SG: |
| 2293 | case BC_REPLY_SG: { |
| 2294 | struct binder_transaction_data_sg tr; |
| 2295 | |
| 2296 | if (copy_from_user(&tr, ptr, sizeof(tr))) |
| 2297 | return -EFAULT; |
| 2298 | ptr += sizeof(tr); |
| 2299 | binder_transaction(proc, thread, &tr.transaction_data, |
| 2300 | cmd == BC_REPLY_SG, tr.buffers_size); |
| 2301 | break; |
| 2302 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2303 | case BC_TRANSACTION: |
| 2304 | case BC_REPLY: { |
| 2305 | struct binder_transaction_data tr; |
| 2306 | |
| 2307 | if (copy_from_user(&tr, ptr, sizeof(tr))) |
| 2308 | return -EFAULT; |
| 2309 | ptr += sizeof(tr); |
Martijn Coenen | 59878d7 | 2016-09-30 14:05:40 +0200 | [diff] [blame] | 2310 | binder_transaction(proc, thread, &tr, |
| 2311 | cmd == BC_REPLY, 0); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2312 | break; |
| 2313 | } |
| 2314 | |
| 2315 | case BC_REGISTER_LOOPER: |
| 2316 | binder_debug(BINDER_DEBUG_THREADS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2317 | "%d:%d BC_REGISTER_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2318 | proc->pid, thread->pid); |
| 2319 | if (thread->looper & BINDER_LOOPER_STATE_ENTERED) { |
| 2320 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2321 | 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] | 2322 | proc->pid, thread->pid); |
| 2323 | } else if (proc->requested_threads == 0) { |
| 2324 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2325 | 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] | 2326 | proc->pid, thread->pid); |
| 2327 | } else { |
| 2328 | proc->requested_threads--; |
| 2329 | proc->requested_threads_started++; |
| 2330 | } |
| 2331 | thread->looper |= BINDER_LOOPER_STATE_REGISTERED; |
| 2332 | break; |
| 2333 | case BC_ENTER_LOOPER: |
| 2334 | binder_debug(BINDER_DEBUG_THREADS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2335 | "%d:%d BC_ENTER_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2336 | proc->pid, thread->pid); |
| 2337 | if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) { |
| 2338 | thread->looper |= BINDER_LOOPER_STATE_INVALID; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2339 | 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] | 2340 | proc->pid, thread->pid); |
| 2341 | } |
| 2342 | thread->looper |= BINDER_LOOPER_STATE_ENTERED; |
| 2343 | break; |
| 2344 | case BC_EXIT_LOOPER: |
| 2345 | binder_debug(BINDER_DEBUG_THREADS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2346 | "%d:%d BC_EXIT_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2347 | proc->pid, thread->pid); |
| 2348 | thread->looper |= BINDER_LOOPER_STATE_EXITED; |
| 2349 | break; |
| 2350 | |
| 2351 | case BC_REQUEST_DEATH_NOTIFICATION: |
| 2352 | case BC_CLEAR_DEATH_NOTIFICATION: { |
| 2353 | uint32_t target; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2354 | binder_uintptr_t cookie; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2355 | struct binder_ref *ref; |
| 2356 | struct binder_ref_death *death; |
| 2357 | |
| 2358 | if (get_user(target, (uint32_t __user *)ptr)) |
| 2359 | return -EFAULT; |
| 2360 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2361 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2362 | return -EFAULT; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2363 | ptr += sizeof(binder_uintptr_t); |
Arve Hjønnevåg | 0a3ffab | 2016-10-24 15:20:29 +0200 | [diff] [blame] | 2364 | ref = binder_get_ref(proc, target, false); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2365 | if (ref == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2366 | binder_user_error("%d:%d %s invalid ref %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2367 | proc->pid, thread->pid, |
| 2368 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? |
| 2369 | "BC_REQUEST_DEATH_NOTIFICATION" : |
| 2370 | "BC_CLEAR_DEATH_NOTIFICATION", |
| 2371 | target); |
| 2372 | break; |
| 2373 | } |
| 2374 | |
| 2375 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2376 | "%d:%d %s %016llx 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] | 2377 | proc->pid, thread->pid, |
| 2378 | cmd == BC_REQUEST_DEATH_NOTIFICATION ? |
| 2379 | "BC_REQUEST_DEATH_NOTIFICATION" : |
| 2380 | "BC_CLEAR_DEATH_NOTIFICATION", |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2381 | (u64)cookie, ref->debug_id, ref->desc, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2382 | ref->strong, ref->weak, ref->node->debug_id); |
| 2383 | |
| 2384 | if (cmd == BC_REQUEST_DEATH_NOTIFICATION) { |
| 2385 | if (ref->death) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2386 | 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] | 2387 | proc->pid, thread->pid); |
| 2388 | break; |
| 2389 | } |
| 2390 | death = kzalloc(sizeof(*death), GFP_KERNEL); |
| 2391 | if (death == NULL) { |
| 2392 | thread->return_error = BR_ERROR; |
| 2393 | binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2394 | "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2395 | proc->pid, thread->pid); |
| 2396 | break; |
| 2397 | } |
| 2398 | binder_stats_created(BINDER_STAT_DEATH); |
| 2399 | INIT_LIST_HEAD(&death->work.entry); |
| 2400 | death->cookie = cookie; |
| 2401 | ref->death = death; |
| 2402 | if (ref->node->proc == NULL) { |
| 2403 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; |
| 2404 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 2405 | list_add_tail(&ref->death->work.entry, &thread->todo); |
| 2406 | } else { |
| 2407 | list_add_tail(&ref->death->work.entry, &proc->todo); |
| 2408 | wake_up_interruptible(&proc->wait); |
| 2409 | } |
| 2410 | } |
| 2411 | } else { |
| 2412 | if (ref->death == NULL) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2413 | 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] | 2414 | proc->pid, thread->pid); |
| 2415 | break; |
| 2416 | } |
| 2417 | death = ref->death; |
| 2418 | if (death->cookie != cookie) { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2419 | binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2420 | proc->pid, thread->pid, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2421 | (u64)death->cookie, |
| 2422 | (u64)cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2423 | break; |
| 2424 | } |
| 2425 | ref->death = NULL; |
| 2426 | if (list_empty(&death->work.entry)) { |
| 2427 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; |
| 2428 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 2429 | list_add_tail(&death->work.entry, &thread->todo); |
| 2430 | } else { |
| 2431 | list_add_tail(&death->work.entry, &proc->todo); |
| 2432 | wake_up_interruptible(&proc->wait); |
| 2433 | } |
| 2434 | } else { |
| 2435 | BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER); |
| 2436 | death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR; |
| 2437 | } |
| 2438 | } |
| 2439 | } break; |
| 2440 | case BC_DEAD_BINDER_DONE: { |
| 2441 | struct binder_work *w; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2442 | binder_uintptr_t cookie; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2443 | struct binder_ref_death *death = NULL; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 2444 | |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2445 | if (get_user(cookie, (binder_uintptr_t __user *)ptr)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2446 | return -EFAULT; |
| 2447 | |
Lisa Du | 7a64cd8 | 2016-02-17 09:32:52 +0800 | [diff] [blame] | 2448 | ptr += sizeof(cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2449 | list_for_each_entry(w, &proc->delivered_death, entry) { |
| 2450 | struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work); |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 2451 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2452 | if (tmp_death->cookie == cookie) { |
| 2453 | death = tmp_death; |
| 2454 | break; |
| 2455 | } |
| 2456 | } |
| 2457 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2458 | "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n", |
| 2459 | proc->pid, thread->pid, (u64)cookie, |
| 2460 | death); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2461 | if (death == NULL) { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2462 | binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n", |
| 2463 | proc->pid, thread->pid, (u64)cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2464 | break; |
| 2465 | } |
| 2466 | |
| 2467 | list_del_init(&death->work.entry); |
| 2468 | if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) { |
| 2469 | death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; |
| 2470 | if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { |
| 2471 | list_add_tail(&death->work.entry, &thread->todo); |
| 2472 | } else { |
| 2473 | list_add_tail(&death->work.entry, &proc->todo); |
| 2474 | wake_up_interruptible(&proc->wait); |
| 2475 | } |
| 2476 | } |
| 2477 | } break; |
| 2478 | |
| 2479 | default: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2480 | pr_err("%d:%d unknown command %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2481 | proc->pid, thread->pid, cmd); |
| 2482 | return -EINVAL; |
| 2483 | } |
| 2484 | *consumed = ptr - buffer; |
| 2485 | } |
| 2486 | return 0; |
| 2487 | } |
| 2488 | |
Bojan Prtvar | fb07ebc | 2013-09-02 08:18:40 +0200 | [diff] [blame] | 2489 | static void binder_stat_br(struct binder_proc *proc, |
| 2490 | struct binder_thread *thread, uint32_t cmd) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2491 | { |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2492 | trace_binder_return(cmd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2493 | if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) { |
| 2494 | binder_stats.br[_IOC_NR(cmd)]++; |
| 2495 | proc->stats.br[_IOC_NR(cmd)]++; |
| 2496 | thread->stats.br[_IOC_NR(cmd)]++; |
| 2497 | } |
| 2498 | } |
| 2499 | |
| 2500 | static int binder_has_proc_work(struct binder_proc *proc, |
| 2501 | struct binder_thread *thread) |
| 2502 | { |
| 2503 | return !list_empty(&proc->todo) || |
| 2504 | (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); |
| 2505 | } |
| 2506 | |
| 2507 | static int binder_has_thread_work(struct binder_thread *thread) |
| 2508 | { |
| 2509 | return !list_empty(&thread->todo) || thread->return_error != BR_OK || |
| 2510 | (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); |
| 2511 | } |
| 2512 | |
| 2513 | static int binder_thread_read(struct binder_proc *proc, |
| 2514 | struct binder_thread *thread, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2515 | binder_uintptr_t binder_buffer, size_t size, |
| 2516 | binder_size_t *consumed, int non_block) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2517 | { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2518 | void __user *buffer = (void __user *)(uintptr_t)binder_buffer; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2519 | void __user *ptr = buffer + *consumed; |
| 2520 | void __user *end = buffer + size; |
| 2521 | |
| 2522 | int ret = 0; |
| 2523 | int wait_for_proc_work; |
| 2524 | |
| 2525 | if (*consumed == 0) { |
| 2526 | if (put_user(BR_NOOP, (uint32_t __user *)ptr)) |
| 2527 | return -EFAULT; |
| 2528 | ptr += sizeof(uint32_t); |
| 2529 | } |
| 2530 | |
| 2531 | retry: |
| 2532 | wait_for_proc_work = thread->transaction_stack == NULL && |
| 2533 | list_empty(&thread->todo); |
| 2534 | |
| 2535 | if (thread->return_error != BR_OK && ptr < end) { |
| 2536 | if (thread->return_error2 != BR_OK) { |
| 2537 | if (put_user(thread->return_error2, (uint32_t __user *)ptr)) |
| 2538 | return -EFAULT; |
| 2539 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | 89334ab | 2012-10-16 15:29:52 -0700 | [diff] [blame] | 2540 | binder_stat_br(proc, thread, thread->return_error2); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2541 | if (ptr == end) |
| 2542 | goto done; |
| 2543 | thread->return_error2 = BR_OK; |
| 2544 | } |
| 2545 | if (put_user(thread->return_error, (uint32_t __user *)ptr)) |
| 2546 | return -EFAULT; |
| 2547 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | 89334ab | 2012-10-16 15:29:52 -0700 | [diff] [blame] | 2548 | binder_stat_br(proc, thread, thread->return_error); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2549 | thread->return_error = BR_OK; |
| 2550 | goto done; |
| 2551 | } |
| 2552 | |
| 2553 | |
| 2554 | thread->looper |= BINDER_LOOPER_STATE_WAITING; |
| 2555 | if (wait_for_proc_work) |
| 2556 | proc->ready_threads++; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2557 | |
| 2558 | binder_unlock(__func__); |
| 2559 | |
| 2560 | trace_binder_wait_for_work(wait_for_proc_work, |
| 2561 | !!thread->transaction_stack, |
| 2562 | !list_empty(&thread->todo)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2563 | if (wait_for_proc_work) { |
| 2564 | if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED | |
| 2565 | BINDER_LOOPER_STATE_ENTERED))) { |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2566 | 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] | 2567 | proc->pid, thread->pid, thread->looper); |
| 2568 | wait_event_interruptible(binder_user_error_wait, |
| 2569 | binder_stop_on_user_error < 2); |
| 2570 | } |
| 2571 | binder_set_nice(proc->default_priority); |
| 2572 | if (non_block) { |
| 2573 | if (!binder_has_proc_work(proc, thread)) |
| 2574 | ret = -EAGAIN; |
| 2575 | } else |
Colin Cross | e2610b2 | 2013-05-06 23:50:15 +0000 | [diff] [blame] | 2576 | 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] | 2577 | } else { |
| 2578 | if (non_block) { |
| 2579 | if (!binder_has_thread_work(thread)) |
| 2580 | ret = -EAGAIN; |
| 2581 | } else |
Colin Cross | e2610b2 | 2013-05-06 23:50:15 +0000 | [diff] [blame] | 2582 | ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2583 | } |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2584 | |
| 2585 | binder_lock(__func__); |
| 2586 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2587 | if (wait_for_proc_work) |
| 2588 | proc->ready_threads--; |
| 2589 | thread->looper &= ~BINDER_LOOPER_STATE_WAITING; |
| 2590 | |
| 2591 | if (ret) |
| 2592 | return ret; |
| 2593 | |
| 2594 | while (1) { |
| 2595 | uint32_t cmd; |
| 2596 | struct binder_transaction_data tr; |
| 2597 | struct binder_work *w; |
| 2598 | struct binder_transaction *t = NULL; |
| 2599 | |
Dmitry Voytik | 395262a | 2014-09-08 18:16:34 +0400 | [diff] [blame] | 2600 | if (!list_empty(&thread->todo)) { |
| 2601 | w = list_first_entry(&thread->todo, struct binder_work, |
| 2602 | entry); |
| 2603 | } else if (!list_empty(&proc->todo) && wait_for_proc_work) { |
| 2604 | w = list_first_entry(&proc->todo, struct binder_work, |
| 2605 | entry); |
| 2606 | } else { |
| 2607 | /* no data added */ |
| 2608 | if (ptr - buffer == 4 && |
| 2609 | !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2610 | goto retry; |
| 2611 | break; |
| 2612 | } |
| 2613 | |
| 2614 | if (end - ptr < sizeof(tr) + 4) |
| 2615 | break; |
| 2616 | |
| 2617 | switch (w->type) { |
| 2618 | case BINDER_WORK_TRANSACTION: { |
| 2619 | t = container_of(w, struct binder_transaction, work); |
| 2620 | } break; |
| 2621 | case BINDER_WORK_TRANSACTION_COMPLETE: { |
| 2622 | cmd = BR_TRANSACTION_COMPLETE; |
| 2623 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2624 | return -EFAULT; |
| 2625 | ptr += sizeof(uint32_t); |
| 2626 | |
| 2627 | binder_stat_br(proc, thread, cmd); |
| 2628 | binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2629 | "%d:%d BR_TRANSACTION_COMPLETE\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2630 | proc->pid, thread->pid); |
| 2631 | |
| 2632 | list_del(&w->entry); |
| 2633 | kfree(w); |
| 2634 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 2635 | } break; |
| 2636 | case BINDER_WORK_NODE: { |
| 2637 | struct binder_node *node = container_of(w, struct binder_node, work); |
| 2638 | uint32_t cmd = BR_NOOP; |
| 2639 | const char *cmd_name; |
| 2640 | int strong = node->internal_strong_refs || node->local_strong_refs; |
| 2641 | int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 2642 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2643 | if (weak && !node->has_weak_ref) { |
| 2644 | cmd = BR_INCREFS; |
| 2645 | cmd_name = "BR_INCREFS"; |
| 2646 | node->has_weak_ref = 1; |
| 2647 | node->pending_weak_ref = 1; |
| 2648 | node->local_weak_refs++; |
| 2649 | } else if (strong && !node->has_strong_ref) { |
| 2650 | cmd = BR_ACQUIRE; |
| 2651 | cmd_name = "BR_ACQUIRE"; |
| 2652 | node->has_strong_ref = 1; |
| 2653 | node->pending_strong_ref = 1; |
| 2654 | node->local_strong_refs++; |
| 2655 | } else if (!strong && node->has_strong_ref) { |
| 2656 | cmd = BR_RELEASE; |
| 2657 | cmd_name = "BR_RELEASE"; |
| 2658 | node->has_strong_ref = 0; |
| 2659 | } else if (!weak && node->has_weak_ref) { |
| 2660 | cmd = BR_DECREFS; |
| 2661 | cmd_name = "BR_DECREFS"; |
| 2662 | node->has_weak_ref = 0; |
| 2663 | } |
| 2664 | if (cmd != BR_NOOP) { |
| 2665 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2666 | return -EFAULT; |
| 2667 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2668 | if (put_user(node->ptr, |
| 2669 | (binder_uintptr_t __user *)ptr)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2670 | return -EFAULT; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2671 | ptr += sizeof(binder_uintptr_t); |
| 2672 | if (put_user(node->cookie, |
| 2673 | (binder_uintptr_t __user *)ptr)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2674 | return -EFAULT; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2675 | ptr += sizeof(binder_uintptr_t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2676 | |
| 2677 | binder_stat_br(proc, thread, cmd); |
| 2678 | binder_debug(BINDER_DEBUG_USER_REFS, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2679 | "%d:%d %s %d u%016llx c%016llx\n", |
| 2680 | proc->pid, thread->pid, cmd_name, |
| 2681 | node->debug_id, |
| 2682 | (u64)node->ptr, (u64)node->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2683 | } else { |
| 2684 | list_del_init(&w->entry); |
| 2685 | if (!weak && !strong) { |
| 2686 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2687 | "%d:%d node %d u%016llx c%016llx deleted\n", |
| 2688 | proc->pid, thread->pid, |
| 2689 | node->debug_id, |
| 2690 | (u64)node->ptr, |
| 2691 | (u64)node->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2692 | rb_erase(&node->rb_node, &proc->nodes); |
| 2693 | kfree(node); |
| 2694 | binder_stats_deleted(BINDER_STAT_NODE); |
| 2695 | } else { |
| 2696 | binder_debug(BINDER_DEBUG_INTERNAL_REFS, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2697 | "%d:%d node %d u%016llx c%016llx state unchanged\n", |
| 2698 | proc->pid, thread->pid, |
| 2699 | node->debug_id, |
| 2700 | (u64)node->ptr, |
| 2701 | (u64)node->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2702 | } |
| 2703 | } |
| 2704 | } break; |
| 2705 | case BINDER_WORK_DEAD_BINDER: |
| 2706 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
| 2707 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { |
| 2708 | struct binder_ref_death *death; |
| 2709 | uint32_t cmd; |
| 2710 | |
| 2711 | death = container_of(w, struct binder_ref_death, work); |
| 2712 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) |
| 2713 | cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE; |
| 2714 | else |
| 2715 | cmd = BR_DEAD_BINDER; |
| 2716 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2717 | return -EFAULT; |
| 2718 | ptr += sizeof(uint32_t); |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2719 | if (put_user(death->cookie, |
| 2720 | (binder_uintptr_t __user *)ptr)) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2721 | return -EFAULT; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2722 | ptr += sizeof(binder_uintptr_t); |
Arve Hjønnevåg | 89334ab | 2012-10-16 15:29:52 -0700 | [diff] [blame] | 2723 | binder_stat_br(proc, thread, cmd); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2724 | binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2725 | "%d:%d %s %016llx\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2726 | proc->pid, thread->pid, |
| 2727 | cmd == BR_DEAD_BINDER ? |
| 2728 | "BR_DEAD_BINDER" : |
| 2729 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2730 | (u64)death->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2731 | |
| 2732 | if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) { |
| 2733 | list_del(&w->entry); |
| 2734 | kfree(death); |
| 2735 | binder_stats_deleted(BINDER_STAT_DEATH); |
| 2736 | } else |
| 2737 | list_move(&w->entry, &proc->delivered_death); |
| 2738 | if (cmd == BR_DEAD_BINDER) |
| 2739 | goto done; /* DEAD_BINDER notifications can cause transactions */ |
| 2740 | } break; |
| 2741 | } |
| 2742 | |
| 2743 | if (!t) |
| 2744 | continue; |
| 2745 | |
| 2746 | BUG_ON(t->buffer == NULL); |
| 2747 | if (t->buffer->target_node) { |
| 2748 | struct binder_node *target_node = t->buffer->target_node; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 2749 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2750 | tr.target.ptr = target_node->ptr; |
| 2751 | tr.cookie = target_node->cookie; |
| 2752 | t->saved_priority = task_nice(current); |
| 2753 | if (t->priority < target_node->min_priority && |
| 2754 | !(t->flags & TF_ONE_WAY)) |
| 2755 | binder_set_nice(t->priority); |
| 2756 | else if (!(t->flags & TF_ONE_WAY) || |
| 2757 | t->saved_priority > target_node->min_priority) |
| 2758 | binder_set_nice(target_node->min_priority); |
| 2759 | cmd = BR_TRANSACTION; |
| 2760 | } else { |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2761 | tr.target.ptr = 0; |
| 2762 | tr.cookie = 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2763 | cmd = BR_REPLY; |
| 2764 | } |
| 2765 | tr.code = t->code; |
| 2766 | tr.flags = t->flags; |
Eric W. Biederman | 4a2ebb9 | 2012-05-25 18:34:53 -0600 | [diff] [blame] | 2767 | tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2768 | |
| 2769 | if (t->from) { |
| 2770 | struct task_struct *sender = t->from->proc->tsk; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 2771 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2772 | tr.sender_pid = task_tgid_nr_ns(sender, |
Eric W. Biederman | 17cf22c | 2010-03-02 14:51:53 -0800 | [diff] [blame] | 2773 | task_active_pid_ns(current)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2774 | } else { |
| 2775 | tr.sender_pid = 0; |
| 2776 | } |
| 2777 | |
| 2778 | tr.data_size = t->buffer->data_size; |
| 2779 | tr.offsets_size = t->buffer->offsets_size; |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2780 | tr.data.ptr.buffer = (binder_uintptr_t)( |
| 2781 | (uintptr_t)t->buffer->data + |
| 2782 | proc->user_buffer_offset); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2783 | tr.data.ptr.offsets = tr.data.ptr.buffer + |
| 2784 | ALIGN(t->buffer->data_size, |
| 2785 | sizeof(void *)); |
| 2786 | |
| 2787 | if (put_user(cmd, (uint32_t __user *)ptr)) |
| 2788 | return -EFAULT; |
| 2789 | ptr += sizeof(uint32_t); |
| 2790 | if (copy_to_user(ptr, &tr, sizeof(tr))) |
| 2791 | return -EFAULT; |
| 2792 | ptr += sizeof(tr); |
| 2793 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2794 | trace_binder_transaction_received(t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2795 | binder_stat_br(proc, thread, cmd); |
| 2796 | binder_debug(BINDER_DEBUG_TRANSACTION, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2797 | "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2798 | proc->pid, thread->pid, |
| 2799 | (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" : |
| 2800 | "BR_REPLY", |
| 2801 | t->debug_id, t->from ? t->from->proc->pid : 0, |
| 2802 | t->from ? t->from->pid : 0, cmd, |
| 2803 | t->buffer->data_size, t->buffer->offsets_size, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2804 | (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2805 | |
| 2806 | list_del(&t->work.entry); |
| 2807 | t->buffer->allow_user_free = 1; |
| 2808 | if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) { |
| 2809 | t->to_parent = thread->transaction_stack; |
| 2810 | t->to_thread = thread; |
| 2811 | thread->transaction_stack = t; |
| 2812 | } else { |
| 2813 | t->buffer->transaction = NULL; |
| 2814 | kfree(t); |
| 2815 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 2816 | } |
| 2817 | break; |
| 2818 | } |
| 2819 | |
| 2820 | done: |
| 2821 | |
| 2822 | *consumed = ptr - buffer; |
| 2823 | if (proc->requested_threads + proc->ready_threads == 0 && |
| 2824 | proc->requested_threads_started < proc->max_threads && |
| 2825 | (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | |
| 2826 | BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */ |
| 2827 | /*spawn a new thread if we leave this out */) { |
| 2828 | proc->requested_threads++; |
| 2829 | binder_debug(BINDER_DEBUG_THREADS, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2830 | "%d:%d BR_SPAWN_LOOPER\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2831 | proc->pid, thread->pid); |
| 2832 | if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer)) |
| 2833 | return -EFAULT; |
Arve Hjønnevåg | 89334ab | 2012-10-16 15:29:52 -0700 | [diff] [blame] | 2834 | binder_stat_br(proc, thread, BR_SPAWN_LOOPER); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2835 | } |
| 2836 | return 0; |
| 2837 | } |
| 2838 | |
| 2839 | static void binder_release_work(struct list_head *list) |
| 2840 | { |
| 2841 | struct binder_work *w; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 2842 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2843 | while (!list_empty(list)) { |
| 2844 | w = list_first_entry(list, struct binder_work, entry); |
| 2845 | list_del_init(&w->entry); |
| 2846 | switch (w->type) { |
| 2847 | case BINDER_WORK_TRANSACTION: { |
| 2848 | struct binder_transaction *t; |
| 2849 | |
| 2850 | t = container_of(w, struct binder_transaction, work); |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2851 | if (t->buffer->target_node && |
| 2852 | !(t->flags & TF_ONE_WAY)) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2853 | binder_send_failed_reply(t, BR_DEAD_REPLY); |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2854 | } else { |
| 2855 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2856 | "undelivered transaction %d\n", |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2857 | t->debug_id); |
| 2858 | t->buffer->transaction = NULL; |
| 2859 | kfree(t); |
| 2860 | binder_stats_deleted(BINDER_STAT_TRANSACTION); |
| 2861 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2862 | } break; |
| 2863 | case BINDER_WORK_TRANSACTION_COMPLETE: { |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2864 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2865 | "undelivered TRANSACTION_COMPLETE\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2866 | kfree(w); |
| 2867 | binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); |
| 2868 | } break; |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2869 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
| 2870 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { |
| 2871 | struct binder_ref_death *death; |
| 2872 | |
| 2873 | death = container_of(w, struct binder_ref_death, work); |
| 2874 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 2875 | "undelivered death notification, %016llx\n", |
| 2876 | (u64)death->cookie); |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2877 | kfree(death); |
| 2878 | binder_stats_deleted(BINDER_STAT_DEATH); |
| 2879 | } break; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2880 | default: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2881 | pr_err("unexpected work type, %d, not freed\n", |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 2882 | w->type); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2883 | break; |
| 2884 | } |
| 2885 | } |
| 2886 | |
| 2887 | } |
| 2888 | |
| 2889 | static struct binder_thread *binder_get_thread(struct binder_proc *proc) |
| 2890 | { |
| 2891 | struct binder_thread *thread = NULL; |
| 2892 | struct rb_node *parent = NULL; |
| 2893 | struct rb_node **p = &proc->threads.rb_node; |
| 2894 | |
| 2895 | while (*p) { |
| 2896 | parent = *p; |
| 2897 | thread = rb_entry(parent, struct binder_thread, rb_node); |
| 2898 | |
| 2899 | if (current->pid < thread->pid) |
| 2900 | p = &(*p)->rb_left; |
| 2901 | else if (current->pid > thread->pid) |
| 2902 | p = &(*p)->rb_right; |
| 2903 | else |
| 2904 | break; |
| 2905 | } |
| 2906 | if (*p == NULL) { |
| 2907 | thread = kzalloc(sizeof(*thread), GFP_KERNEL); |
| 2908 | if (thread == NULL) |
| 2909 | return NULL; |
| 2910 | binder_stats_created(BINDER_STAT_THREAD); |
| 2911 | thread->proc = proc; |
| 2912 | thread->pid = current->pid; |
| 2913 | init_waitqueue_head(&thread->wait); |
| 2914 | INIT_LIST_HEAD(&thread->todo); |
| 2915 | rb_link_node(&thread->rb_node, parent, p); |
| 2916 | rb_insert_color(&thread->rb_node, &proc->threads); |
| 2917 | thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; |
| 2918 | thread->return_error = BR_OK; |
| 2919 | thread->return_error2 = BR_OK; |
| 2920 | } |
| 2921 | return thread; |
| 2922 | } |
| 2923 | |
| 2924 | static int binder_free_thread(struct binder_proc *proc, |
| 2925 | struct binder_thread *thread) |
| 2926 | { |
| 2927 | struct binder_transaction *t; |
| 2928 | struct binder_transaction *send_reply = NULL; |
| 2929 | int active_transactions = 0; |
| 2930 | |
| 2931 | rb_erase(&thread->rb_node, &proc->threads); |
| 2932 | t = thread->transaction_stack; |
| 2933 | if (t && t->to_thread == thread) |
| 2934 | send_reply = t; |
| 2935 | while (t) { |
| 2936 | active_transactions++; |
| 2937 | binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 2938 | "release %d:%d transaction %d %s, still active\n", |
| 2939 | proc->pid, thread->pid, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2940 | t->debug_id, |
| 2941 | (t->to_thread == thread) ? "in" : "out"); |
| 2942 | |
| 2943 | if (t->to_thread == thread) { |
| 2944 | t->to_proc = NULL; |
| 2945 | t->to_thread = NULL; |
| 2946 | if (t->buffer) { |
| 2947 | t->buffer->transaction = NULL; |
| 2948 | t->buffer = NULL; |
| 2949 | } |
| 2950 | t = t->to_parent; |
| 2951 | } else if (t->from == thread) { |
| 2952 | t->from = NULL; |
| 2953 | t = t->from_parent; |
| 2954 | } else |
| 2955 | BUG(); |
| 2956 | } |
| 2957 | if (send_reply) |
| 2958 | binder_send_failed_reply(send_reply, BR_DEAD_REPLY); |
| 2959 | binder_release_work(&thread->todo); |
| 2960 | kfree(thread); |
| 2961 | binder_stats_deleted(BINDER_STAT_THREAD); |
| 2962 | return active_transactions; |
| 2963 | } |
| 2964 | |
| 2965 | static unsigned int binder_poll(struct file *filp, |
| 2966 | struct poll_table_struct *wait) |
| 2967 | { |
| 2968 | struct binder_proc *proc = filp->private_data; |
| 2969 | struct binder_thread *thread = NULL; |
| 2970 | int wait_for_proc_work; |
| 2971 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2972 | binder_lock(__func__); |
| 2973 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2974 | thread = binder_get_thread(proc); |
| 2975 | |
| 2976 | wait_for_proc_work = thread->transaction_stack == NULL && |
| 2977 | list_empty(&thread->todo) && thread->return_error == BR_OK; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 2978 | |
| 2979 | binder_unlock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 2980 | |
| 2981 | if (wait_for_proc_work) { |
| 2982 | if (binder_has_proc_work(proc, thread)) |
| 2983 | return POLLIN; |
| 2984 | poll_wait(filp, &proc->wait, wait); |
| 2985 | if (binder_has_proc_work(proc, thread)) |
| 2986 | return POLLIN; |
| 2987 | } else { |
| 2988 | if (binder_has_thread_work(thread)) |
| 2989 | return POLLIN; |
| 2990 | poll_wait(filp, &thread->wait, wait); |
| 2991 | if (binder_has_thread_work(thread)) |
| 2992 | return POLLIN; |
| 2993 | } |
| 2994 | return 0; |
| 2995 | } |
| 2996 | |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 2997 | static int binder_ioctl_write_read(struct file *filp, |
| 2998 | unsigned int cmd, unsigned long arg, |
| 2999 | struct binder_thread *thread) |
| 3000 | { |
| 3001 | int ret = 0; |
| 3002 | struct binder_proc *proc = filp->private_data; |
| 3003 | unsigned int size = _IOC_SIZE(cmd); |
| 3004 | void __user *ubuf = (void __user *)arg; |
| 3005 | struct binder_write_read bwr; |
| 3006 | |
| 3007 | if (size != sizeof(struct binder_write_read)) { |
| 3008 | ret = -EINVAL; |
| 3009 | goto out; |
| 3010 | } |
| 3011 | if (copy_from_user(&bwr, ubuf, sizeof(bwr))) { |
| 3012 | ret = -EFAULT; |
| 3013 | goto out; |
| 3014 | } |
| 3015 | binder_debug(BINDER_DEBUG_READ_WRITE, |
| 3016 | "%d:%d write %lld at %016llx, read %lld at %016llx\n", |
| 3017 | proc->pid, thread->pid, |
| 3018 | (u64)bwr.write_size, (u64)bwr.write_buffer, |
| 3019 | (u64)bwr.read_size, (u64)bwr.read_buffer); |
| 3020 | |
| 3021 | if (bwr.write_size > 0) { |
| 3022 | ret = binder_thread_write(proc, thread, |
| 3023 | bwr.write_buffer, |
| 3024 | bwr.write_size, |
| 3025 | &bwr.write_consumed); |
| 3026 | trace_binder_write_done(ret); |
| 3027 | if (ret < 0) { |
| 3028 | bwr.read_consumed = 0; |
| 3029 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) |
| 3030 | ret = -EFAULT; |
| 3031 | goto out; |
| 3032 | } |
| 3033 | } |
| 3034 | if (bwr.read_size > 0) { |
| 3035 | ret = binder_thread_read(proc, thread, bwr.read_buffer, |
| 3036 | bwr.read_size, |
| 3037 | &bwr.read_consumed, |
| 3038 | filp->f_flags & O_NONBLOCK); |
| 3039 | trace_binder_read_done(ret); |
| 3040 | if (!list_empty(&proc->todo)) |
| 3041 | wake_up_interruptible(&proc->wait); |
| 3042 | if (ret < 0) { |
| 3043 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) |
| 3044 | ret = -EFAULT; |
| 3045 | goto out; |
| 3046 | } |
| 3047 | } |
| 3048 | binder_debug(BINDER_DEBUG_READ_WRITE, |
| 3049 | "%d:%d wrote %lld of %lld, read return %lld of %lld\n", |
| 3050 | proc->pid, thread->pid, |
| 3051 | (u64)bwr.write_consumed, (u64)bwr.write_size, |
| 3052 | (u64)bwr.read_consumed, (u64)bwr.read_size); |
| 3053 | if (copy_to_user(ubuf, &bwr, sizeof(bwr))) { |
| 3054 | ret = -EFAULT; |
| 3055 | goto out; |
| 3056 | } |
| 3057 | out: |
| 3058 | return ret; |
| 3059 | } |
| 3060 | |
| 3061 | static int binder_ioctl_set_ctx_mgr(struct file *filp) |
| 3062 | { |
| 3063 | int ret = 0; |
| 3064 | struct binder_proc *proc = filp->private_data; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3065 | struct binder_context *context = proc->context; |
| 3066 | |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3067 | kuid_t curr_euid = current_euid(); |
| 3068 | |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3069 | if (context->binder_context_mgr_node) { |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3070 | pr_err("BINDER_SET_CONTEXT_MGR already set\n"); |
| 3071 | ret = -EBUSY; |
| 3072 | goto out; |
| 3073 | } |
Stephen Smalley | 79af730 | 2015-01-21 10:54:10 -0500 | [diff] [blame] | 3074 | ret = security_binder_set_context_mgr(proc->tsk); |
| 3075 | if (ret < 0) |
| 3076 | goto out; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3077 | if (uid_valid(context->binder_context_mgr_uid)) { |
| 3078 | if (!uid_eq(context->binder_context_mgr_uid, curr_euid)) { |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3079 | pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n", |
| 3080 | from_kuid(&init_user_ns, curr_euid), |
| 3081 | from_kuid(&init_user_ns, |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3082 | context->binder_context_mgr_uid)); |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3083 | ret = -EPERM; |
| 3084 | goto out; |
| 3085 | } |
| 3086 | } else { |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3087 | context->binder_context_mgr_uid = curr_euid; |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3088 | } |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3089 | context->binder_context_mgr_node = binder_new_node(proc, 0, 0); |
| 3090 | if (!context->binder_context_mgr_node) { |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3091 | ret = -ENOMEM; |
| 3092 | goto out; |
| 3093 | } |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3094 | context->binder_context_mgr_node->local_weak_refs++; |
| 3095 | context->binder_context_mgr_node->local_strong_refs++; |
| 3096 | context->binder_context_mgr_node->has_strong_ref = 1; |
| 3097 | context->binder_context_mgr_node->has_weak_ref = 1; |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3098 | out: |
| 3099 | return ret; |
| 3100 | } |
| 3101 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3102 | static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 3103 | { |
| 3104 | int ret; |
| 3105 | struct binder_proc *proc = filp->private_data; |
| 3106 | struct binder_thread *thread; |
| 3107 | unsigned int size = _IOC_SIZE(cmd); |
| 3108 | void __user *ubuf = (void __user *)arg; |
| 3109 | |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3110 | /*pr_info("binder_ioctl: %d:%d %x %lx\n", |
| 3111 | proc->pid, current->pid, cmd, arg);*/ |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3112 | |
Chen Feng | a906d69 | 2016-02-01 14:04:02 +0800 | [diff] [blame] | 3113 | if (unlikely(current->mm != proc->vma_vm_mm)) { |
| 3114 | pr_err("current mm mismatch proc mm\n"); |
| 3115 | return -EINVAL; |
| 3116 | } |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3117 | trace_binder_ioctl(cmd, arg); |
| 3118 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3119 | ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
| 3120 | if (ret) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3121 | goto err_unlocked; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3122 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3123 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3124 | thread = binder_get_thread(proc); |
| 3125 | if (thread == NULL) { |
| 3126 | ret = -ENOMEM; |
| 3127 | goto err; |
| 3128 | } |
| 3129 | |
| 3130 | switch (cmd) { |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3131 | case BINDER_WRITE_READ: |
| 3132 | ret = binder_ioctl_write_read(filp, cmd, arg, thread); |
| 3133 | if (ret) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3134 | goto err; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3135 | break; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3136 | case BINDER_SET_MAX_THREADS: |
| 3137 | if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) { |
| 3138 | ret = -EINVAL; |
| 3139 | goto err; |
| 3140 | } |
| 3141 | break; |
| 3142 | case BINDER_SET_CONTEXT_MGR: |
Tair Rzayev | 78260ac | 2014-06-03 22:27:21 +0300 | [diff] [blame] | 3143 | ret = binder_ioctl_set_ctx_mgr(filp); |
| 3144 | if (ret) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3145 | goto err; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3146 | break; |
| 3147 | case BINDER_THREAD_EXIT: |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 3148 | binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3149 | proc->pid, thread->pid); |
| 3150 | binder_free_thread(proc, thread); |
| 3151 | thread = NULL; |
| 3152 | break; |
Mathieu Maret | 36c89c0 | 2014-04-15 12:03:05 +0200 | [diff] [blame] | 3153 | case BINDER_VERSION: { |
| 3154 | struct binder_version __user *ver = ubuf; |
| 3155 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3156 | if (size != sizeof(struct binder_version)) { |
| 3157 | ret = -EINVAL; |
| 3158 | goto err; |
| 3159 | } |
Mathieu Maret | 36c89c0 | 2014-04-15 12:03:05 +0200 | [diff] [blame] | 3160 | if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, |
| 3161 | &ver->protocol_version)) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3162 | ret = -EINVAL; |
| 3163 | goto err; |
| 3164 | } |
| 3165 | break; |
Mathieu Maret | 36c89c0 | 2014-04-15 12:03:05 +0200 | [diff] [blame] | 3166 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3167 | default: |
| 3168 | ret = -EINVAL; |
| 3169 | goto err; |
| 3170 | } |
| 3171 | ret = 0; |
| 3172 | err: |
| 3173 | if (thread) |
| 3174 | thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3175 | binder_unlock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3176 | wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); |
| 3177 | if (ret && ret != -ERESTARTSYS) |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 3178 | 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] | 3179 | err_unlocked: |
| 3180 | trace_binder_ioctl_done(ret); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3181 | return ret; |
| 3182 | } |
| 3183 | |
| 3184 | static void binder_vma_open(struct vm_area_struct *vma) |
| 3185 | { |
| 3186 | struct binder_proc *proc = vma->vm_private_data; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 3187 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3188 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 3189 | "%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] | 3190 | proc->pid, vma->vm_start, vma->vm_end, |
| 3191 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, |
| 3192 | (unsigned long)pgprot_val(vma->vm_page_prot)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3193 | } |
| 3194 | |
| 3195 | static void binder_vma_close(struct vm_area_struct *vma) |
| 3196 | { |
| 3197 | struct binder_proc *proc = vma->vm_private_data; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 3198 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3199 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 3200 | "%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] | 3201 | proc->pid, vma->vm_start, vma->vm_end, |
| 3202 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, |
| 3203 | (unsigned long)pgprot_val(vma->vm_page_prot)); |
| 3204 | proc->vma = NULL; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 3205 | proc->vma_vm_mm = NULL; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3206 | binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES); |
| 3207 | } |
| 3208 | |
Vinayak Menon | ddac7d5 | 2014-06-02 18:17:59 +0530 | [diff] [blame] | 3209 | static int binder_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| 3210 | { |
| 3211 | return VM_FAULT_SIGBUS; |
| 3212 | } |
| 3213 | |
Kirill A. Shutemov | 7cbea8d | 2015-09-09 15:39:26 -0700 | [diff] [blame] | 3214 | static const struct vm_operations_struct binder_vm_ops = { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3215 | .open = binder_vma_open, |
| 3216 | .close = binder_vma_close, |
Vinayak Menon | ddac7d5 | 2014-06-02 18:17:59 +0530 | [diff] [blame] | 3217 | .fault = binder_vm_fault, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3218 | }; |
| 3219 | |
| 3220 | static int binder_mmap(struct file *filp, struct vm_area_struct *vma) |
| 3221 | { |
| 3222 | int ret; |
| 3223 | struct vm_struct *area; |
| 3224 | struct binder_proc *proc = filp->private_data; |
| 3225 | const char *failure_string; |
| 3226 | struct binder_buffer *buffer; |
| 3227 | |
Al Viro | a79f41e | 2012-08-15 18:23:36 -0400 | [diff] [blame] | 3228 | if (proc->tsk != current) |
| 3229 | return -EINVAL; |
| 3230 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3231 | if ((vma->vm_end - vma->vm_start) > SZ_4M) |
| 3232 | vma->vm_end = vma->vm_start + SZ_4M; |
| 3233 | |
| 3234 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 3235 | "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n", |
| 3236 | proc->pid, vma->vm_start, vma->vm_end, |
| 3237 | (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, |
| 3238 | (unsigned long)pgprot_val(vma->vm_page_prot)); |
| 3239 | |
| 3240 | if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) { |
| 3241 | ret = -EPERM; |
| 3242 | failure_string = "bad vm_flags"; |
| 3243 | goto err_bad_arg; |
| 3244 | } |
| 3245 | vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE; |
| 3246 | |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 3247 | mutex_lock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3248 | if (proc->buffer) { |
| 3249 | ret = -EBUSY; |
| 3250 | failure_string = "already mapped"; |
| 3251 | goto err_already_mapped; |
| 3252 | } |
| 3253 | |
| 3254 | area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP); |
| 3255 | if (area == NULL) { |
| 3256 | ret = -ENOMEM; |
| 3257 | failure_string = "get_vm_area"; |
| 3258 | goto err_get_vm_area_failed; |
| 3259 | } |
| 3260 | proc->buffer = area->addr; |
| 3261 | proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer; |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 3262 | mutex_unlock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3263 | |
| 3264 | #ifdef CONFIG_CPU_CACHE_VIPT |
| 3265 | if (cache_is_vipt_aliasing()) { |
| 3266 | while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) { |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 3267 | 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] | 3268 | vma->vm_start += PAGE_SIZE; |
| 3269 | } |
| 3270 | } |
| 3271 | #endif |
| 3272 | proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL); |
| 3273 | if (proc->pages == NULL) { |
| 3274 | ret = -ENOMEM; |
| 3275 | failure_string = "alloc page array"; |
| 3276 | goto err_alloc_pages_failed; |
| 3277 | } |
| 3278 | proc->buffer_size = vma->vm_end - vma->vm_start; |
| 3279 | |
| 3280 | vma->vm_ops = &binder_vm_ops; |
| 3281 | vma->vm_private_data = proc; |
| 3282 | |
| 3283 | if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) { |
| 3284 | ret = -ENOMEM; |
| 3285 | failure_string = "alloc small buf"; |
| 3286 | goto err_alloc_small_buf_failed; |
| 3287 | } |
| 3288 | buffer = proc->buffer; |
| 3289 | INIT_LIST_HEAD(&proc->buffers); |
| 3290 | list_add(&buffer->entry, &proc->buffers); |
| 3291 | buffer->free = 1; |
| 3292 | binder_insert_free_buffer(proc, buffer); |
| 3293 | proc->free_async_space = proc->buffer_size / 2; |
| 3294 | barrier(); |
Al Viro | a79f41e | 2012-08-15 18:23:36 -0400 | [diff] [blame] | 3295 | proc->files = get_files_struct(current); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3296 | proc->vma = vma; |
Arve Hjønnevåg | 2a90957 | 2012-03-08 15:43:36 -0800 | [diff] [blame] | 3297 | proc->vma_vm_mm = vma->vm_mm; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3298 | |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 3299 | /*pr_info("binder_mmap: %d %lx-%lx maps %p\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3300 | proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/ |
| 3301 | return 0; |
| 3302 | |
| 3303 | err_alloc_small_buf_failed: |
| 3304 | kfree(proc->pages); |
| 3305 | proc->pages = NULL; |
| 3306 | err_alloc_pages_failed: |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 3307 | mutex_lock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3308 | vfree(proc->buffer); |
| 3309 | proc->buffer = NULL; |
| 3310 | err_get_vm_area_failed: |
| 3311 | err_already_mapped: |
Arve Hjønnevåg | bd1eff9 | 2012-02-01 15:29:13 -0800 | [diff] [blame] | 3312 | mutex_unlock(&binder_mmap_lock); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3313 | err_bad_arg: |
Sherwin Soltani | 258767f | 2012-06-26 02:00:30 -0400 | [diff] [blame] | 3314 | pr_err("binder_mmap: %d %lx-%lx %s failed %d\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3315 | proc->pid, vma->vm_start, vma->vm_end, failure_string, ret); |
| 3316 | return ret; |
| 3317 | } |
| 3318 | |
| 3319 | static int binder_open(struct inode *nodp, struct file *filp) |
| 3320 | { |
| 3321 | struct binder_proc *proc; |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 3322 | struct binder_device *binder_dev; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3323 | |
| 3324 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n", |
| 3325 | current->group_leader->pid, current->pid); |
| 3326 | |
| 3327 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); |
| 3328 | if (proc == NULL) |
| 3329 | return -ENOMEM; |
| 3330 | get_task_struct(current); |
| 3331 | proc->tsk = current; |
Chen Feng | a906d69 | 2016-02-01 14:04:02 +0800 | [diff] [blame] | 3332 | proc->vma_vm_mm = current->mm; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3333 | INIT_LIST_HEAD(&proc->todo); |
| 3334 | init_waitqueue_head(&proc->wait); |
| 3335 | proc->default_priority = task_nice(current); |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 3336 | binder_dev = container_of(filp->private_data, struct binder_device, |
| 3337 | miscdev); |
| 3338 | proc->context = &binder_dev->context; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3339 | |
| 3340 | binder_lock(__func__); |
| 3341 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3342 | binder_stats_created(BINDER_STAT_PROC); |
| 3343 | hlist_add_head(&proc->proc_node, &binder_procs); |
| 3344 | proc->pid = current->group_leader->pid; |
| 3345 | INIT_LIST_HEAD(&proc->delivered_death); |
| 3346 | filp->private_data = proc; |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3347 | |
| 3348 | binder_unlock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3349 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3350 | if (binder_debugfs_dir_entry_proc) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3351 | char strbuf[11]; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 3352 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3353 | snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 3354 | /* |
| 3355 | * proc debug entries are shared between contexts, so |
| 3356 | * this will fail if the process tries to open the driver |
| 3357 | * again with a different context. The priting code will |
| 3358 | * anyway print all contexts that a given PID has, so this |
| 3359 | * is not a problem. |
| 3360 | */ |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3361 | proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO, |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 3362 | binder_debugfs_dir_entry_proc, |
| 3363 | (void *)(unsigned long)proc->pid, |
| 3364 | &binder_proc_fops); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3365 | } |
| 3366 | |
| 3367 | return 0; |
| 3368 | } |
| 3369 | |
| 3370 | static int binder_flush(struct file *filp, fl_owner_t id) |
| 3371 | { |
| 3372 | struct binder_proc *proc = filp->private_data; |
| 3373 | |
| 3374 | binder_defer_work(proc, BINDER_DEFERRED_FLUSH); |
| 3375 | |
| 3376 | return 0; |
| 3377 | } |
| 3378 | |
| 3379 | static void binder_deferred_flush(struct binder_proc *proc) |
| 3380 | { |
| 3381 | struct rb_node *n; |
| 3382 | int wake_count = 0; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 3383 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3384 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) { |
| 3385 | struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 3386 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3387 | thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; |
| 3388 | if (thread->looper & BINDER_LOOPER_STATE_WAITING) { |
| 3389 | wake_up_interruptible(&thread->wait); |
| 3390 | wake_count++; |
| 3391 | } |
| 3392 | } |
| 3393 | wake_up_interruptible_all(&proc->wait); |
| 3394 | |
| 3395 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
| 3396 | "binder_flush: %d woke %d threads\n", proc->pid, |
| 3397 | wake_count); |
| 3398 | } |
| 3399 | |
| 3400 | static int binder_release(struct inode *nodp, struct file *filp) |
| 3401 | { |
| 3402 | struct binder_proc *proc = filp->private_data; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 3403 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3404 | debugfs_remove(proc->debugfs_entry); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3405 | binder_defer_work(proc, BINDER_DEFERRED_RELEASE); |
| 3406 | |
| 3407 | return 0; |
| 3408 | } |
| 3409 | |
Mirsal Ennaime | 008fa74 | 2013-03-12 11:41:59 +0100 | [diff] [blame] | 3410 | static int binder_node_release(struct binder_node *node, int refs) |
| 3411 | { |
| 3412 | struct binder_ref *ref; |
| 3413 | int death = 0; |
| 3414 | |
| 3415 | list_del_init(&node->work.entry); |
| 3416 | binder_release_work(&node->async_todo); |
| 3417 | |
| 3418 | if (hlist_empty(&node->refs)) { |
| 3419 | kfree(node); |
| 3420 | binder_stats_deleted(BINDER_STAT_NODE); |
| 3421 | |
| 3422 | return refs; |
| 3423 | } |
| 3424 | |
| 3425 | node->proc = NULL; |
| 3426 | node->local_strong_refs = 0; |
| 3427 | node->local_weak_refs = 0; |
| 3428 | hlist_add_head(&node->dead_node, &binder_dead_nodes); |
| 3429 | |
| 3430 | hlist_for_each_entry(ref, &node->refs, node_entry) { |
| 3431 | refs++; |
| 3432 | |
| 3433 | if (!ref->death) |
Arve Hjønnevåg | e194fd8 | 2014-02-17 13:58:29 -0800 | [diff] [blame] | 3434 | continue; |
Mirsal Ennaime | 008fa74 | 2013-03-12 11:41:59 +0100 | [diff] [blame] | 3435 | |
| 3436 | death++; |
| 3437 | |
| 3438 | if (list_empty(&ref->death->work.entry)) { |
| 3439 | ref->death->work.type = BINDER_WORK_DEAD_BINDER; |
| 3440 | list_add_tail(&ref->death->work.entry, |
| 3441 | &ref->proc->todo); |
| 3442 | wake_up_interruptible(&ref->proc->wait); |
| 3443 | } else |
| 3444 | BUG(); |
| 3445 | } |
| 3446 | |
Mirsal Ennaime | 008fa74 | 2013-03-12 11:41:59 +0100 | [diff] [blame] | 3447 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
| 3448 | "node %d now dead, refs %d, death %d\n", |
| 3449 | node->debug_id, refs, death); |
| 3450 | |
| 3451 | return refs; |
| 3452 | } |
| 3453 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3454 | static void binder_deferred_release(struct binder_proc *proc) |
| 3455 | { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3456 | struct binder_transaction *t; |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3457 | struct binder_context *context = proc->context; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3458 | struct rb_node *n; |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3459 | int threads, nodes, incoming_refs, outgoing_refs, buffers, |
| 3460 | active_transactions, page_count; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3461 | |
| 3462 | BUG_ON(proc->vma); |
| 3463 | BUG_ON(proc->files); |
| 3464 | |
| 3465 | hlist_del(&proc->proc_node); |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3466 | |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3467 | if (context->binder_context_mgr_node && |
| 3468 | context->binder_context_mgr_node->proc == proc) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3469 | binder_debug(BINDER_DEBUG_DEAD_BINDER, |
Mirsal Ennaime | c07c933 | 2013-03-12 11:42:02 +0100 | [diff] [blame] | 3470 | "%s: %d context_mgr_node gone\n", |
| 3471 | __func__, proc->pid); |
Martijn Coenen | 0b3311e | 2016-09-30 15:51:48 +0200 | [diff] [blame] | 3472 | context->binder_context_mgr_node = NULL; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3473 | } |
| 3474 | |
| 3475 | threads = 0; |
| 3476 | active_transactions = 0; |
| 3477 | while ((n = rb_first(&proc->threads))) { |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3478 | struct binder_thread *thread; |
| 3479 | |
| 3480 | thread = rb_entry(n, struct binder_thread, rb_node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3481 | threads++; |
| 3482 | active_transactions += binder_free_thread(proc, thread); |
| 3483 | } |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3484 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3485 | nodes = 0; |
| 3486 | incoming_refs = 0; |
| 3487 | while ((n = rb_first(&proc->nodes))) { |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3488 | struct binder_node *node; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3489 | |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3490 | node = rb_entry(n, struct binder_node, rb_node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3491 | nodes++; |
| 3492 | rb_erase(&node->rb_node, &proc->nodes); |
Mirsal Ennaime | 008fa74 | 2013-03-12 11:41:59 +0100 | [diff] [blame] | 3493 | incoming_refs = binder_node_release(node, incoming_refs); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3494 | } |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3495 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3496 | outgoing_refs = 0; |
| 3497 | while ((n = rb_first(&proc->refs_by_desc))) { |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3498 | struct binder_ref *ref; |
| 3499 | |
| 3500 | ref = rb_entry(n, struct binder_ref, rb_node_desc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3501 | outgoing_refs++; |
| 3502 | binder_delete_ref(ref); |
| 3503 | } |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3504 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3505 | binder_release_work(&proc->todo); |
Arve Hjønnevåg | 675d66b | 2012-10-16 15:29:54 -0700 | [diff] [blame] | 3506 | binder_release_work(&proc->delivered_death); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3507 | |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3508 | buffers = 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3509 | while ((n = rb_first(&proc->allocated_buffers))) { |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3510 | struct binder_buffer *buffer; |
| 3511 | |
| 3512 | buffer = rb_entry(n, struct binder_buffer, rb_node); |
| 3513 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3514 | t = buffer->transaction; |
| 3515 | if (t) { |
| 3516 | t->buffer = NULL; |
| 3517 | buffer->transaction = NULL; |
Anmol Sarma | 56b468f | 2012-10-30 22:35:43 +0530 | [diff] [blame] | 3518 | pr_err("release proc %d, transaction %d, not freed\n", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3519 | proc->pid, t->debug_id); |
| 3520 | /*BUG();*/ |
| 3521 | } |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3522 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3523 | binder_free_buf(proc, buffer); |
| 3524 | buffers++; |
| 3525 | } |
| 3526 | |
| 3527 | binder_stats_deleted(BINDER_STAT_PROC); |
| 3528 | |
| 3529 | page_count = 0; |
| 3530 | if (proc->pages) { |
| 3531 | int i; |
Mirsal Ennaime | 53413e7 | 2013-03-12 11:42:00 +0100 | [diff] [blame] | 3532 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3533 | for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) { |
Mirsal Ennaime | ba97bc5 | 2013-03-12 11:42:01 +0100 | [diff] [blame] | 3534 | void *page_addr; |
| 3535 | |
| 3536 | if (!proc->pages[i]) |
| 3537 | continue; |
| 3538 | |
| 3539 | page_addr = proc->buffer + i * PAGE_SIZE; |
| 3540 | binder_debug(BINDER_DEBUG_BUFFER_ALLOC, |
Mirsal Ennaime | c07c933 | 2013-03-12 11:42:02 +0100 | [diff] [blame] | 3541 | "%s: %d: page %d at %p not freed\n", |
| 3542 | __func__, proc->pid, i, page_addr); |
Mirsal Ennaime | ba97bc5 | 2013-03-12 11:42:01 +0100 | [diff] [blame] | 3543 | unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE); |
| 3544 | __free_page(proc->pages[i]); |
| 3545 | page_count++; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3546 | } |
| 3547 | kfree(proc->pages); |
| 3548 | vfree(proc->buffer); |
| 3549 | } |
| 3550 | |
| 3551 | put_task_struct(proc->tsk); |
| 3552 | |
| 3553 | binder_debug(BINDER_DEBUG_OPEN_CLOSE, |
Mirsal Ennaime | c07c933 | 2013-03-12 11:42:02 +0100 | [diff] [blame] | 3554 | "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n", |
| 3555 | __func__, proc->pid, threads, nodes, incoming_refs, |
| 3556 | outgoing_refs, active_transactions, buffers, page_count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3557 | |
| 3558 | kfree(proc); |
| 3559 | } |
| 3560 | |
| 3561 | static void binder_deferred_func(struct work_struct *work) |
| 3562 | { |
| 3563 | struct binder_proc *proc; |
| 3564 | struct files_struct *files; |
| 3565 | |
| 3566 | int defer; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 3567 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3568 | do { |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3569 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3570 | mutex_lock(&binder_deferred_lock); |
| 3571 | if (!hlist_empty(&binder_deferred_list)) { |
| 3572 | proc = hlist_entry(binder_deferred_list.first, |
| 3573 | struct binder_proc, deferred_work_node); |
| 3574 | hlist_del_init(&proc->deferred_work_node); |
| 3575 | defer = proc->deferred_work; |
| 3576 | proc->deferred_work = 0; |
| 3577 | } else { |
| 3578 | proc = NULL; |
| 3579 | defer = 0; |
| 3580 | } |
| 3581 | mutex_unlock(&binder_deferred_lock); |
| 3582 | |
| 3583 | files = NULL; |
| 3584 | if (defer & BINDER_DEFERRED_PUT_FILES) { |
| 3585 | files = proc->files; |
| 3586 | if (files) |
| 3587 | proc->files = NULL; |
| 3588 | } |
| 3589 | |
| 3590 | if (defer & BINDER_DEFERRED_FLUSH) |
| 3591 | binder_deferred_flush(proc); |
| 3592 | |
| 3593 | if (defer & BINDER_DEFERRED_RELEASE) |
| 3594 | binder_deferred_release(proc); /* frees proc */ |
| 3595 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3596 | binder_unlock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3597 | if (files) |
| 3598 | put_files_struct(files); |
| 3599 | } while (proc); |
| 3600 | } |
| 3601 | static DECLARE_WORK(binder_deferred_work, binder_deferred_func); |
| 3602 | |
| 3603 | static void |
| 3604 | binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer) |
| 3605 | { |
| 3606 | mutex_lock(&binder_deferred_lock); |
| 3607 | proc->deferred_work |= defer; |
| 3608 | if (hlist_unhashed(&proc->deferred_work_node)) { |
| 3609 | hlist_add_head(&proc->deferred_work_node, |
| 3610 | &binder_deferred_list); |
Bhaktipriya Shridhar | 1beba52 | 2016-08-13 22:16:24 +0530 | [diff] [blame] | 3611 | schedule_work(&binder_deferred_work); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3612 | } |
| 3613 | mutex_unlock(&binder_deferred_lock); |
| 3614 | } |
| 3615 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3616 | static void print_binder_transaction(struct seq_file *m, const char *prefix, |
| 3617 | struct binder_transaction *t) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3618 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3619 | seq_printf(m, |
| 3620 | "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d", |
| 3621 | prefix, t->debug_id, t, |
| 3622 | t->from ? t->from->proc->pid : 0, |
| 3623 | t->from ? t->from->pid : 0, |
| 3624 | t->to_proc ? t->to_proc->pid : 0, |
| 3625 | t->to_thread ? t->to_thread->pid : 0, |
| 3626 | t->code, t->flags, t->priority, t->need_reply); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3627 | if (t->buffer == NULL) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3628 | seq_puts(m, " buffer free\n"); |
| 3629 | return; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3630 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3631 | if (t->buffer->target_node) |
| 3632 | seq_printf(m, " node %d", |
| 3633 | t->buffer->target_node->debug_id); |
| 3634 | seq_printf(m, " size %zd:%zd data %p\n", |
| 3635 | t->buffer->data_size, t->buffer->offsets_size, |
| 3636 | t->buffer->data); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3637 | } |
| 3638 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3639 | static void print_binder_buffer(struct seq_file *m, const char *prefix, |
| 3640 | struct binder_buffer *buffer) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3641 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3642 | seq_printf(m, "%s %d: %p size %zd:%zd %s\n", |
| 3643 | prefix, buffer->debug_id, buffer->data, |
| 3644 | buffer->data_size, buffer->offsets_size, |
| 3645 | buffer->transaction ? "active" : "delivered"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3646 | } |
| 3647 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3648 | static void print_binder_work(struct seq_file *m, const char *prefix, |
| 3649 | const char *transaction_prefix, |
| 3650 | struct binder_work *w) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3651 | { |
| 3652 | struct binder_node *node; |
| 3653 | struct binder_transaction *t; |
| 3654 | |
| 3655 | switch (w->type) { |
| 3656 | case BINDER_WORK_TRANSACTION: |
| 3657 | t = container_of(w, struct binder_transaction, work); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3658 | print_binder_transaction(m, transaction_prefix, t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3659 | break; |
| 3660 | case BINDER_WORK_TRANSACTION_COMPLETE: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3661 | seq_printf(m, "%stransaction complete\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3662 | break; |
| 3663 | case BINDER_WORK_NODE: |
| 3664 | node = container_of(w, struct binder_node, work); |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 3665 | seq_printf(m, "%snode work %d: u%016llx c%016llx\n", |
| 3666 | prefix, node->debug_id, |
| 3667 | (u64)node->ptr, (u64)node->cookie); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3668 | break; |
| 3669 | case BINDER_WORK_DEAD_BINDER: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3670 | seq_printf(m, "%shas dead binder\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3671 | break; |
| 3672 | case BINDER_WORK_DEAD_BINDER_AND_CLEAR: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3673 | seq_printf(m, "%shas cleared dead binder\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3674 | break; |
| 3675 | case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3676 | seq_printf(m, "%shas cleared death notification\n", prefix); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3677 | break; |
| 3678 | default: |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3679 | seq_printf(m, "%sunknown work: type %d\n", prefix, w->type); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3680 | break; |
| 3681 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3682 | } |
| 3683 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3684 | static void print_binder_thread(struct seq_file *m, |
| 3685 | struct binder_thread *thread, |
| 3686 | int print_always) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3687 | { |
| 3688 | struct binder_transaction *t; |
| 3689 | struct binder_work *w; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3690 | size_t start_pos = m->count; |
| 3691 | size_t header_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3692 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3693 | seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper); |
| 3694 | header_pos = m->count; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3695 | t = thread->transaction_stack; |
| 3696 | while (t) { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3697 | if (t->from == thread) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3698 | print_binder_transaction(m, |
| 3699 | " outgoing transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3700 | t = t->from_parent; |
| 3701 | } else if (t->to_thread == thread) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3702 | print_binder_transaction(m, |
| 3703 | " incoming transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3704 | t = t->to_parent; |
| 3705 | } else { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3706 | print_binder_transaction(m, " bad transaction", t); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3707 | t = NULL; |
| 3708 | } |
| 3709 | } |
| 3710 | list_for_each_entry(w, &thread->todo, entry) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3711 | print_binder_work(m, " ", " pending transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3712 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3713 | if (!print_always && m->count == header_pos) |
| 3714 | m->count = start_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3715 | } |
| 3716 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3717 | 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] | 3718 | { |
| 3719 | struct binder_ref *ref; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3720 | struct binder_work *w; |
| 3721 | int count; |
| 3722 | |
| 3723 | count = 0; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3724 | hlist_for_each_entry(ref, &node->refs, node_entry) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3725 | count++; |
| 3726 | |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 3727 | seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d", |
| 3728 | node->debug_id, (u64)node->ptr, (u64)node->cookie, |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3729 | node->has_strong_ref, node->has_weak_ref, |
| 3730 | node->local_strong_refs, node->local_weak_refs, |
| 3731 | node->internal_strong_refs, count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3732 | if (count) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3733 | seq_puts(m, " proc"); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3734 | hlist_for_each_entry(ref, &node->refs, node_entry) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3735 | seq_printf(m, " %d", ref->proc->pid); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3736 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3737 | seq_puts(m, "\n"); |
| 3738 | list_for_each_entry(w, &node->async_todo, entry) |
| 3739 | print_binder_work(m, " ", |
| 3740 | " pending async transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3741 | } |
| 3742 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3743 | 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] | 3744 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3745 | seq_printf(m, " ref %d: desc %d %snode %d s %d w %d d %p\n", |
| 3746 | ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ", |
| 3747 | ref->node->debug_id, ref->strong, ref->weak, ref->death); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3748 | } |
| 3749 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3750 | static void print_binder_proc(struct seq_file *m, |
| 3751 | struct binder_proc *proc, int print_all) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3752 | { |
| 3753 | struct binder_work *w; |
| 3754 | struct rb_node *n; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3755 | size_t start_pos = m->count; |
| 3756 | size_t header_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3757 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3758 | seq_printf(m, "proc %d\n", proc->pid); |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 3759 | seq_printf(m, "context %s\n", proc->context->name); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3760 | header_pos = m->count; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3761 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3762 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) |
| 3763 | print_binder_thread(m, rb_entry(n, struct binder_thread, |
| 3764 | rb_node), print_all); |
| 3765 | 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] | 3766 | struct binder_node *node = rb_entry(n, struct binder_node, |
| 3767 | rb_node); |
| 3768 | if (print_all || node->has_async_transaction) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3769 | print_binder_node(m, node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3770 | } |
| 3771 | if (print_all) { |
| 3772 | for (n = rb_first(&proc->refs_by_desc); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3773 | n != NULL; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3774 | n = rb_next(n)) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3775 | print_binder_ref(m, rb_entry(n, struct binder_ref, |
| 3776 | rb_node_desc)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3777 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3778 | for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) |
| 3779 | print_binder_buffer(m, " buffer", |
| 3780 | rb_entry(n, struct binder_buffer, rb_node)); |
| 3781 | list_for_each_entry(w, &proc->todo, entry) |
| 3782 | print_binder_work(m, " ", " pending transaction", w); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3783 | list_for_each_entry(w, &proc->delivered_death, entry) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3784 | seq_puts(m, " has delivered dead binder\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3785 | break; |
| 3786 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3787 | if (!print_all && m->count == header_pos) |
| 3788 | m->count = start_pos; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3789 | } |
| 3790 | |
Cruz Julian Bishop | 167bccb | 2012-12-22 09:00:45 +1000 | [diff] [blame] | 3791 | static const char * const binder_return_strings[] = { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3792 | "BR_ERROR", |
| 3793 | "BR_OK", |
| 3794 | "BR_TRANSACTION", |
| 3795 | "BR_REPLY", |
| 3796 | "BR_ACQUIRE_RESULT", |
| 3797 | "BR_DEAD_REPLY", |
| 3798 | "BR_TRANSACTION_COMPLETE", |
| 3799 | "BR_INCREFS", |
| 3800 | "BR_ACQUIRE", |
| 3801 | "BR_RELEASE", |
| 3802 | "BR_DECREFS", |
| 3803 | "BR_ATTEMPT_ACQUIRE", |
| 3804 | "BR_NOOP", |
| 3805 | "BR_SPAWN_LOOPER", |
| 3806 | "BR_FINISHED", |
| 3807 | "BR_DEAD_BINDER", |
| 3808 | "BR_CLEAR_DEATH_NOTIFICATION_DONE", |
| 3809 | "BR_FAILED_REPLY" |
| 3810 | }; |
| 3811 | |
Cruz Julian Bishop | 167bccb | 2012-12-22 09:00:45 +1000 | [diff] [blame] | 3812 | static const char * const binder_command_strings[] = { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3813 | "BC_TRANSACTION", |
| 3814 | "BC_REPLY", |
| 3815 | "BC_ACQUIRE_RESULT", |
| 3816 | "BC_FREE_BUFFER", |
| 3817 | "BC_INCREFS", |
| 3818 | "BC_ACQUIRE", |
| 3819 | "BC_RELEASE", |
| 3820 | "BC_DECREFS", |
| 3821 | "BC_INCREFS_DONE", |
| 3822 | "BC_ACQUIRE_DONE", |
| 3823 | "BC_ATTEMPT_ACQUIRE", |
| 3824 | "BC_REGISTER_LOOPER", |
| 3825 | "BC_ENTER_LOOPER", |
| 3826 | "BC_EXIT_LOOPER", |
| 3827 | "BC_REQUEST_DEATH_NOTIFICATION", |
| 3828 | "BC_CLEAR_DEATH_NOTIFICATION", |
Martijn Coenen | 5a6da53 | 2016-09-30 14:10:07 +0200 | [diff] [blame^] | 3829 | "BC_DEAD_BINDER_DONE", |
| 3830 | "BC_TRANSACTION_SG", |
| 3831 | "BC_REPLY_SG", |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3832 | }; |
| 3833 | |
Cruz Julian Bishop | 167bccb | 2012-12-22 09:00:45 +1000 | [diff] [blame] | 3834 | static const char * const binder_objstat_strings[] = { |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3835 | "proc", |
| 3836 | "thread", |
| 3837 | "node", |
| 3838 | "ref", |
| 3839 | "death", |
| 3840 | "transaction", |
| 3841 | "transaction_complete" |
| 3842 | }; |
| 3843 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3844 | static void print_binder_stats(struct seq_file *m, const char *prefix, |
| 3845 | struct binder_stats *stats) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3846 | { |
| 3847 | int i; |
| 3848 | |
| 3849 | BUILD_BUG_ON(ARRAY_SIZE(stats->bc) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3850 | ARRAY_SIZE(binder_command_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3851 | for (i = 0; i < ARRAY_SIZE(stats->bc); i++) { |
| 3852 | if (stats->bc[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3853 | seq_printf(m, "%s%s: %d\n", prefix, |
| 3854 | binder_command_strings[i], stats->bc[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3855 | } |
| 3856 | |
| 3857 | BUILD_BUG_ON(ARRAY_SIZE(stats->br) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3858 | ARRAY_SIZE(binder_return_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3859 | for (i = 0; i < ARRAY_SIZE(stats->br); i++) { |
| 3860 | if (stats->br[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3861 | seq_printf(m, "%s%s: %d\n", prefix, |
| 3862 | binder_return_strings[i], stats->br[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3863 | } |
| 3864 | |
| 3865 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3866 | ARRAY_SIZE(binder_objstat_strings)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3867 | BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3868 | ARRAY_SIZE(stats->obj_deleted)); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3869 | for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) { |
| 3870 | if (stats->obj_created[i] || stats->obj_deleted[i]) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3871 | seq_printf(m, "%s%s: active %d total %d\n", prefix, |
| 3872 | binder_objstat_strings[i], |
| 3873 | stats->obj_created[i] - stats->obj_deleted[i], |
| 3874 | stats->obj_created[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3875 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3876 | } |
| 3877 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3878 | static void print_binder_proc_stats(struct seq_file *m, |
| 3879 | struct binder_proc *proc) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3880 | { |
| 3881 | struct binder_work *w; |
| 3882 | struct rb_node *n; |
| 3883 | int count, strong, weak; |
| 3884 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3885 | seq_printf(m, "proc %d\n", proc->pid); |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 3886 | seq_printf(m, "context %s\n", proc->context->name); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3887 | count = 0; |
| 3888 | for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) |
| 3889 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3890 | seq_printf(m, " threads: %d\n", count); |
| 3891 | seq_printf(m, " requested threads: %d+%d/%d\n" |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3892 | " ready threads %d\n" |
| 3893 | " free async space %zd\n", proc->requested_threads, |
| 3894 | proc->requested_threads_started, proc->max_threads, |
| 3895 | proc->ready_threads, proc->free_async_space); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3896 | count = 0; |
| 3897 | for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) |
| 3898 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3899 | seq_printf(m, " nodes: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3900 | count = 0; |
| 3901 | strong = 0; |
| 3902 | weak = 0; |
| 3903 | for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { |
| 3904 | struct binder_ref *ref = rb_entry(n, struct binder_ref, |
| 3905 | rb_node_desc); |
| 3906 | count++; |
| 3907 | strong += ref->strong; |
| 3908 | weak += ref->weak; |
| 3909 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3910 | 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] | 3911 | |
| 3912 | count = 0; |
| 3913 | for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) |
| 3914 | count++; |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3915 | seq_printf(m, " buffers: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3916 | |
| 3917 | count = 0; |
| 3918 | list_for_each_entry(w, &proc->todo, entry) { |
| 3919 | switch (w->type) { |
| 3920 | case BINDER_WORK_TRANSACTION: |
| 3921 | count++; |
| 3922 | break; |
| 3923 | default: |
| 3924 | break; |
| 3925 | } |
| 3926 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3927 | seq_printf(m, " pending transactions: %d\n", count); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3928 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3929 | print_binder_stats(m, " ", &proc->stats); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3930 | } |
| 3931 | |
| 3932 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3933 | static int binder_state_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3934 | { |
| 3935 | struct binder_proc *proc; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3936 | struct binder_node *node; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3937 | int do_lock = !binder_debug_no_lock; |
| 3938 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3939 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3940 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3941 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3942 | seq_puts(m, "binder state:\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3943 | |
| 3944 | if (!hlist_empty(&binder_dead_nodes)) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3945 | seq_puts(m, "dead nodes:\n"); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3946 | hlist_for_each_entry(node, &binder_dead_nodes, dead_node) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3947 | print_binder_node(m, node); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3948 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3949 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3950 | print_binder_proc(m, proc, 1); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3951 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3952 | binder_unlock(__func__); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3953 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3954 | } |
| 3955 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3956 | static int binder_stats_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3957 | { |
| 3958 | struct binder_proc *proc; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3959 | int do_lock = !binder_debug_no_lock; |
| 3960 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3961 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3962 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3963 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3964 | seq_puts(m, "binder stats:\n"); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3965 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3966 | print_binder_stats(m, "", &binder_stats); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3967 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3968 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3969 | print_binder_proc_stats(m, proc); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3970 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3971 | binder_unlock(__func__); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3972 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3973 | } |
| 3974 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3975 | static int binder_transactions_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3976 | { |
| 3977 | struct binder_proc *proc; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3978 | int do_lock = !binder_debug_no_lock; |
| 3979 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3980 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3981 | binder_lock(__func__); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3982 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3983 | seq_puts(m, "binder transactions:\n"); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 3984 | hlist_for_each_entry(proc, &binder_procs, proc_node) |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3985 | print_binder_proc(m, proc, 0); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3986 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3987 | binder_unlock(__func__); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3988 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3989 | } |
| 3990 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 3991 | static int binder_proc_show(struct seq_file *m, void *unused) |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3992 | { |
Riley Andrews | 83050a4 | 2016-02-09 21:05:33 -0800 | [diff] [blame] | 3993 | struct binder_proc *itr; |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 3994 | int pid = (unsigned long)m->private; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3995 | int do_lock = !binder_debug_no_lock; |
| 3996 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 3997 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 3998 | binder_lock(__func__); |
Riley Andrews | 83050a4 | 2016-02-09 21:05:33 -0800 | [diff] [blame] | 3999 | |
| 4000 | hlist_for_each_entry(itr, &binder_procs, proc_node) { |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 4001 | if (itr->pid == pid) { |
| 4002 | seq_puts(m, "binder proc state:\n"); |
| 4003 | print_binder_proc(m, itr, 1); |
Riley Andrews | 83050a4 | 2016-02-09 21:05:33 -0800 | [diff] [blame] | 4004 | } |
| 4005 | } |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4006 | if (do_lock) |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 4007 | binder_unlock(__func__); |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4008 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4009 | } |
| 4010 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4011 | static void print_binder_transaction_log_entry(struct seq_file *m, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4012 | struct binder_transaction_log_entry *e) |
| 4013 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4014 | seq_printf(m, |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 4015 | "%d: %s from %d:%d to %d:%d context %s node %d handle %d size %d:%d\n", |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4016 | e->debug_id, (e->call_type == 2) ? "reply" : |
| 4017 | ((e->call_type == 1) ? "async" : "call "), e->from_proc, |
Martijn Coenen | 63b9f3b | 2016-10-17 15:17:31 +0200 | [diff] [blame] | 4018 | e->from_thread, e->to_proc, e->to_thread, e->context_name, |
| 4019 | e->to_node, e->target_handle, e->data_size, e->offsets_size); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4020 | } |
| 4021 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4022 | 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] | 4023 | { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4024 | struct binder_transaction_log *log = m->private; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4025 | int i; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4026 | |
| 4027 | if (log->full) { |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4028 | for (i = log->next; i < ARRAY_SIZE(log->entry); i++) |
| 4029 | print_binder_transaction_log_entry(m, &log->entry[i]); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4030 | } |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4031 | for (i = 0; i < log->next; i++) |
| 4032 | print_binder_transaction_log_entry(m, &log->entry[i]); |
| 4033 | return 0; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4034 | } |
| 4035 | |
| 4036 | static const struct file_operations binder_fops = { |
| 4037 | .owner = THIS_MODULE, |
| 4038 | .poll = binder_poll, |
| 4039 | .unlocked_ioctl = binder_ioctl, |
Arve Hjønnevåg | da49889 | 2014-02-21 14:40:26 -0800 | [diff] [blame] | 4040 | .compat_ioctl = binder_ioctl, |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4041 | .mmap = binder_mmap, |
| 4042 | .open = binder_open, |
| 4043 | .flush = binder_flush, |
| 4044 | .release = binder_release, |
| 4045 | }; |
| 4046 | |
Arve Hjønnevåg | 5249f48 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4047 | BINDER_DEBUG_ENTRY(state); |
| 4048 | BINDER_DEBUG_ENTRY(stats); |
| 4049 | BINDER_DEBUG_ENTRY(transactions); |
| 4050 | BINDER_DEBUG_ENTRY(transaction_log); |
| 4051 | |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 4052 | static int __init init_binder_device(const char *name) |
| 4053 | { |
| 4054 | int ret; |
| 4055 | struct binder_device *binder_device; |
| 4056 | |
| 4057 | binder_device = kzalloc(sizeof(*binder_device), GFP_KERNEL); |
| 4058 | if (!binder_device) |
| 4059 | return -ENOMEM; |
| 4060 | |
| 4061 | binder_device->miscdev.fops = &binder_fops; |
| 4062 | binder_device->miscdev.minor = MISC_DYNAMIC_MINOR; |
| 4063 | binder_device->miscdev.name = name; |
| 4064 | |
| 4065 | binder_device->context.binder_context_mgr_uid = INVALID_UID; |
| 4066 | binder_device->context.name = name; |
| 4067 | |
| 4068 | ret = misc_register(&binder_device->miscdev); |
| 4069 | if (ret < 0) { |
| 4070 | kfree(binder_device); |
| 4071 | return ret; |
| 4072 | } |
| 4073 | |
| 4074 | hlist_add_head(&binder_device->hlist, &binder_devices); |
| 4075 | |
| 4076 | return ret; |
| 4077 | } |
| 4078 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4079 | static int __init binder_init(void) |
| 4080 | { |
| 4081 | int ret; |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 4082 | char *device_name, *device_names; |
| 4083 | struct binder_device *device; |
| 4084 | struct hlist_node *tmp; |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4085 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4086 | binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL); |
| 4087 | if (binder_debugfs_dir_entry_root) |
| 4088 | binder_debugfs_dir_entry_proc = debugfs_create_dir("proc", |
| 4089 | binder_debugfs_dir_entry_root); |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 4090 | |
Arve Hjønnevåg | 16b6655 | 2009-04-28 20:57:50 -0700 | [diff] [blame] | 4091 | if (binder_debugfs_dir_entry_root) { |
| 4092 | debugfs_create_file("state", |
| 4093 | S_IRUGO, |
| 4094 | binder_debugfs_dir_entry_root, |
| 4095 | NULL, |
| 4096 | &binder_state_fops); |
| 4097 | debugfs_create_file("stats", |
| 4098 | S_IRUGO, |
| 4099 | binder_debugfs_dir_entry_root, |
| 4100 | NULL, |
| 4101 | &binder_stats_fops); |
| 4102 | debugfs_create_file("transactions", |
| 4103 | S_IRUGO, |
| 4104 | binder_debugfs_dir_entry_root, |
| 4105 | NULL, |
| 4106 | &binder_transactions_fops); |
| 4107 | debugfs_create_file("transaction_log", |
| 4108 | S_IRUGO, |
| 4109 | binder_debugfs_dir_entry_root, |
| 4110 | &binder_transaction_log, |
| 4111 | &binder_transaction_log_fops); |
| 4112 | debugfs_create_file("failed_transaction_log", |
| 4113 | S_IRUGO, |
| 4114 | binder_debugfs_dir_entry_root, |
| 4115 | &binder_transaction_log_failed, |
| 4116 | &binder_transaction_log_fops); |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4117 | } |
Martijn Coenen | 6b7c712 | 2016-09-30 16:08:09 +0200 | [diff] [blame] | 4118 | |
| 4119 | /* |
| 4120 | * Copy the module_parameter string, because we don't want to |
| 4121 | * tokenize it in-place. |
| 4122 | */ |
| 4123 | device_names = kzalloc(strlen(binder_devices_param) + 1, GFP_KERNEL); |
| 4124 | if (!device_names) { |
| 4125 | ret = -ENOMEM; |
| 4126 | goto err_alloc_device_names_failed; |
| 4127 | } |
| 4128 | strcpy(device_names, binder_devices_param); |
| 4129 | |
| 4130 | while ((device_name = strsep(&device_names, ","))) { |
| 4131 | ret = init_binder_device(device_name); |
| 4132 | if (ret) |
| 4133 | goto err_init_binder_device_failed; |
| 4134 | } |
| 4135 | |
| 4136 | return ret; |
| 4137 | |
| 4138 | err_init_binder_device_failed: |
| 4139 | hlist_for_each_entry_safe(device, tmp, &binder_devices, hlist) { |
| 4140 | misc_deregister(&device->miscdev); |
| 4141 | hlist_del(&device->hlist); |
| 4142 | kfree(device); |
| 4143 | } |
| 4144 | err_alloc_device_names_failed: |
| 4145 | debugfs_remove_recursive(binder_debugfs_dir_entry_root); |
| 4146 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4147 | return ret; |
| 4148 | } |
| 4149 | |
| 4150 | device_initcall(binder_init); |
| 4151 | |
Arve Hjønnevåg | 975a1ac | 2012-10-16 15:29:53 -0700 | [diff] [blame] | 4152 | #define CREATE_TRACE_POINTS |
| 4153 | #include "binder_trace.h" |
| 4154 | |
Greg Kroah-Hartman | 355b050 | 2011-11-30 20:18:14 +0900 | [diff] [blame] | 4155 | MODULE_LICENSE("GPL v2"); |