]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
19 | #ifndef __BTRFS_CTREE__ | |
20 | #define __BTRFS_CTREE__ | |
21 | ||
22 | #include <linux/mm.h> | |
23 | #include <linux/highmem.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/rwsem.h> | |
26 | #include <linux/semaphore.h> | |
27 | #include <linux/completion.h> | |
28 | #include <linux/backing-dev.h> | |
29 | #include <linux/wait.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/kobject.h> | |
32 | #include <trace/events/btrfs.h> | |
33 | #include <asm/kmap_types.h> | |
34 | #include <linux/pagemap.h> | |
35 | #include <linux/btrfs.h> | |
36 | #include <linux/btrfs_tree.h> | |
37 | #include <linux/workqueue.h> | |
38 | #include <linux/security.h> | |
39 | #include <linux/sizes.h> | |
40 | #include <linux/dynamic_debug.h> | |
41 | #include "extent_io.h" | |
42 | #include "extent_map.h" | |
43 | #include "async-thread.h" | |
44 | ||
45 | struct btrfs_trans_handle; | |
46 | struct btrfs_transaction; | |
47 | struct btrfs_pending_snapshot; | |
48 | extern struct kmem_cache *btrfs_trans_handle_cachep; | |
49 | extern struct kmem_cache *btrfs_transaction_cachep; | |
50 | extern struct kmem_cache *btrfs_bit_radix_cachep; | |
51 | extern struct kmem_cache *btrfs_path_cachep; | |
52 | extern struct kmem_cache *btrfs_free_space_cachep; | |
53 | struct btrfs_ordered_sum; | |
54 | ||
55 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
56 | #define STATIC noinline | |
57 | #else | |
58 | #define STATIC static noinline | |
59 | #endif | |
60 | ||
61 | #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ | |
62 | ||
63 | #define BTRFS_MAX_MIRRORS 3 | |
64 | ||
65 | #define BTRFS_MAX_LEVEL 8 | |
66 | ||
67 | #define BTRFS_COMPAT_EXTENT_TREE_V0 | |
68 | ||
69 | /* | |
70 | * the max metadata block size. This limit is somewhat artificial, | |
71 | * but the memmove costs go through the roof for larger blocks. | |
72 | */ | |
73 | #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 | |
74 | ||
75 | /* | |
76 | * we can actually store much bigger names, but lets not confuse the rest | |
77 | * of linux | |
78 | */ | |
79 | #define BTRFS_NAME_LEN 255 | |
80 | ||
81 | /* | |
82 | * Theoretical limit is larger, but we keep this down to a sane | |
83 | * value. That should limit greatly the possibility of collisions on | |
84 | * inode ref items. | |
85 | */ | |
86 | #define BTRFS_LINK_MAX 65535U | |
87 | ||
88 | static const int btrfs_csum_sizes[] = { 4 }; | |
89 | ||
90 | /* four bytes for CRC32 */ | |
91 | #define BTRFS_EMPTY_DIR_SIZE 0 | |
92 | ||
93 | /* ioprio of readahead is set to idle */ | |
94 | #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) | |
95 | ||
96 | #define BTRFS_DIRTY_METADATA_THRESH SZ_32M | |
97 | ||
98 | #define BTRFS_MAX_EXTENT_SIZE SZ_128M | |
99 | ||
100 | struct btrfs_mapping_tree { | |
101 | struct extent_map_tree map_tree; | |
102 | }; | |
103 | ||
104 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) | |
105 | { | |
106 | BUG_ON(num_stripes == 0); | |
107 | return sizeof(struct btrfs_chunk) + | |
108 | sizeof(struct btrfs_stripe) * (num_stripes - 1); | |
109 | } | |
110 | ||
111 | /* | |
112 | * File system states | |
113 | */ | |
114 | #define BTRFS_FS_STATE_ERROR 0 | |
115 | #define BTRFS_FS_STATE_REMOUNTING 1 | |
116 | #define BTRFS_FS_STATE_TRANS_ABORTED 2 | |
117 | #define BTRFS_FS_STATE_DEV_REPLACING 3 | |
118 | #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 | |
119 | ||
120 | #define BTRFS_BACKREF_REV_MAX 256 | |
121 | #define BTRFS_BACKREF_REV_SHIFT 56 | |
122 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ | |
123 | BTRFS_BACKREF_REV_SHIFT) | |
124 | ||
125 | #define BTRFS_OLD_BACKREF_REV 0 | |
126 | #define BTRFS_MIXED_BACKREF_REV 1 | |
127 | ||
128 | /* | |
129 | * every tree block (leaf or node) starts with this header. | |
130 | */ | |
131 | struct btrfs_header { | |
132 | /* these first four must match the super block */ | |
133 | u8 csum[BTRFS_CSUM_SIZE]; | |
134 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | |
135 | __le64 bytenr; /* which block this node is supposed to live in */ | |
136 | __le64 flags; | |
137 | ||
138 | /* allowed to be different from the super from here on down */ | |
139 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
140 | __le64 generation; | |
141 | __le64 owner; | |
142 | __le32 nritems; | |
143 | u8 level; | |
144 | } __attribute__ ((__packed__)); | |
145 | ||
146 | /* | |
147 | * this is a very generous portion of the super block, giving us | |
148 | * room to translate 14 chunks with 3 stripes each. | |
149 | */ | |
150 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 | |
151 | ||
152 | /* | |
153 | * just in case we somehow lose the roots and are not able to mount, | |
154 | * we store an array of the roots from previous transactions | |
155 | * in the super. | |
156 | */ | |
157 | #define BTRFS_NUM_BACKUP_ROOTS 4 | |
158 | struct btrfs_root_backup { | |
159 | __le64 tree_root; | |
160 | __le64 tree_root_gen; | |
161 | ||
162 | __le64 chunk_root; | |
163 | __le64 chunk_root_gen; | |
164 | ||
165 | __le64 extent_root; | |
166 | __le64 extent_root_gen; | |
167 | ||
168 | __le64 fs_root; | |
169 | __le64 fs_root_gen; | |
170 | ||
171 | __le64 dev_root; | |
172 | __le64 dev_root_gen; | |
173 | ||
174 | __le64 csum_root; | |
175 | __le64 csum_root_gen; | |
176 | ||
177 | __le64 total_bytes; | |
178 | __le64 bytes_used; | |
179 | __le64 num_devices; | |
180 | /* future */ | |
181 | __le64 unused_64[4]; | |
182 | ||
183 | u8 tree_root_level; | |
184 | u8 chunk_root_level; | |
185 | u8 extent_root_level; | |
186 | u8 fs_root_level; | |
187 | u8 dev_root_level; | |
188 | u8 csum_root_level; | |
189 | /* future and to align */ | |
190 | u8 unused_8[10]; | |
191 | } __attribute__ ((__packed__)); | |
192 | ||
193 | /* | |
194 | * the super block basically lists the main trees of the FS | |
195 | * it currently lacks any block count etc etc | |
196 | */ | |
197 | struct btrfs_super_block { | |
198 | u8 csum[BTRFS_CSUM_SIZE]; | |
199 | /* the first 4 fields must match struct btrfs_header */ | |
200 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ | |
201 | __le64 bytenr; /* this block number */ | |
202 | __le64 flags; | |
203 | ||
204 | /* allowed to be different from the btrfs_header from here own down */ | |
205 | __le64 magic; | |
206 | __le64 generation; | |
207 | __le64 root; | |
208 | __le64 chunk_root; | |
209 | __le64 log_root; | |
210 | ||
211 | /* this will help find the new super based on the log root */ | |
212 | __le64 log_root_transid; | |
213 | __le64 total_bytes; | |
214 | __le64 bytes_used; | |
215 | __le64 root_dir_objectid; | |
216 | __le64 num_devices; | |
217 | __le32 sectorsize; | |
218 | __le32 nodesize; | |
219 | __le32 __unused_leafsize; | |
220 | __le32 stripesize; | |
221 | __le32 sys_chunk_array_size; | |
222 | __le64 chunk_root_generation; | |
223 | __le64 compat_flags; | |
224 | __le64 compat_ro_flags; | |
225 | __le64 incompat_flags; | |
226 | __le16 csum_type; | |
227 | u8 root_level; | |
228 | u8 chunk_root_level; | |
229 | u8 log_root_level; | |
230 | struct btrfs_dev_item dev_item; | |
231 | ||
232 | char label[BTRFS_LABEL_SIZE]; | |
233 | ||
234 | __le64 cache_generation; | |
235 | __le64 uuid_tree_generation; | |
236 | ||
237 | /* future expansion */ | |
238 | __le64 reserved[30]; | |
239 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; | |
240 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; | |
241 | } __attribute__ ((__packed__)); | |
242 | ||
243 | /* | |
244 | * Compat flags that we support. If any incompat flags are set other than the | |
245 | * ones specified below then we will fail to mount | |
246 | */ | |
247 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL | |
248 | #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL | |
249 | #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL | |
250 | ||
251 | #define BTRFS_FEATURE_COMPAT_RO_SUPP \ | |
252 | (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ | |
253 | BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) | |
254 | ||
255 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL | |
256 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL | |
257 | ||
258 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ | |
259 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ | |
260 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ | |
261 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ | |
262 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ | |
263 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ | |
264 | BTRFS_FEATURE_INCOMPAT_RAID56 | \ | |
265 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ | |
266 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ | |
267 | BTRFS_FEATURE_INCOMPAT_NO_HOLES) | |
268 | ||
269 | #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ | |
270 | (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) | |
271 | #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL | |
272 | ||
273 | /* | |
274 | * A leaf is full of items. offset and size tell us where to find | |
275 | * the item in the leaf (relative to the start of the data area) | |
276 | */ | |
277 | struct btrfs_item { | |
278 | struct btrfs_disk_key key; | |
279 | __le32 offset; | |
280 | __le32 size; | |
281 | } __attribute__ ((__packed__)); | |
282 | ||
283 | /* | |
284 | * leaves have an item area and a data area: | |
285 | * [item0, item1....itemN] [free space] [dataN...data1, data0] | |
286 | * | |
287 | * The data is separate from the items to get the keys closer together | |
288 | * during searches. | |
289 | */ | |
290 | struct btrfs_leaf { | |
291 | struct btrfs_header header; | |
292 | struct btrfs_item items[]; | |
293 | } __attribute__ ((__packed__)); | |
294 | ||
295 | /* | |
296 | * all non-leaf blocks are nodes, they hold only keys and pointers to | |
297 | * other blocks | |
298 | */ | |
299 | struct btrfs_key_ptr { | |
300 | struct btrfs_disk_key key; | |
301 | __le64 blockptr; | |
302 | __le64 generation; | |
303 | } __attribute__ ((__packed__)); | |
304 | ||
305 | struct btrfs_node { | |
306 | struct btrfs_header header; | |
307 | struct btrfs_key_ptr ptrs[]; | |
308 | } __attribute__ ((__packed__)); | |
309 | ||
310 | /* | |
311 | * btrfs_paths remember the path taken from the root down to the leaf. | |
312 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point | |
313 | * to any other levels that are present. | |
314 | * | |
315 | * The slots array records the index of the item or block pointer | |
316 | * used while walking the tree. | |
317 | */ | |
318 | enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; | |
319 | struct btrfs_path { | |
320 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; | |
321 | int slots[BTRFS_MAX_LEVEL]; | |
322 | /* if there is real range locking, this locks field will change */ | |
323 | u8 locks[BTRFS_MAX_LEVEL]; | |
324 | u8 reada; | |
325 | /* keep some upper locks as we walk down */ | |
326 | u8 lowest_level; | |
327 | ||
328 | /* | |
329 | * set by btrfs_split_item, tells search_slot to keep all locks | |
330 | * and to force calls to keep space in the nodes | |
331 | */ | |
332 | unsigned int search_for_split:1; | |
333 | unsigned int keep_locks:1; | |
334 | unsigned int skip_locking:1; | |
335 | unsigned int leave_spinning:1; | |
336 | unsigned int search_commit_root:1; | |
337 | unsigned int need_commit_sem:1; | |
338 | unsigned int skip_release_on_error:1; | |
339 | }; | |
340 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ | |
341 | sizeof(struct btrfs_item)) | |
342 | struct btrfs_dev_replace { | |
343 | u64 replace_state; /* see #define above */ | |
344 | u64 time_started; /* seconds since 1-Jan-1970 */ | |
345 | u64 time_stopped; /* seconds since 1-Jan-1970 */ | |
346 | atomic64_t num_write_errors; | |
347 | atomic64_t num_uncorrectable_read_errors; | |
348 | ||
349 | u64 cursor_left; | |
350 | u64 committed_cursor_left; | |
351 | u64 cursor_left_last_write_of_item; | |
352 | u64 cursor_right; | |
353 | ||
354 | u64 cont_reading_from_srcdev_mode; /* see #define above */ | |
355 | ||
356 | int is_valid; | |
357 | int item_needs_writeback; | |
358 | struct btrfs_device *srcdev; | |
359 | struct btrfs_device *tgtdev; | |
360 | ||
361 | pid_t lock_owner; | |
362 | atomic_t nesting_level; | |
363 | struct mutex lock_finishing_cancel_unmount; | |
364 | rwlock_t lock; | |
365 | atomic_t read_locks; | |
366 | atomic_t blocking_readers; | |
367 | wait_queue_head_t read_lock_wq; | |
368 | ||
369 | struct btrfs_scrub_progress scrub_progress; | |
370 | }; | |
371 | ||
372 | /* For raid type sysfs entries */ | |
373 | struct raid_kobject { | |
374 | int raid_type; | |
375 | struct kobject kobj; | |
376 | }; | |
377 | ||
378 | struct btrfs_space_info { | |
379 | spinlock_t lock; | |
380 | ||
381 | u64 total_bytes; /* total bytes in the space, | |
382 | this doesn't take mirrors into account */ | |
383 | u64 bytes_used; /* total bytes used, | |
384 | this doesn't take mirrors into account */ | |
385 | u64 bytes_pinned; /* total bytes pinned, will be freed when the | |
386 | transaction finishes */ | |
387 | u64 bytes_reserved; /* total bytes the allocator has reserved for | |
388 | current allocations */ | |
389 | u64 bytes_may_use; /* number of bytes that may be used for | |
390 | delalloc/allocations */ | |
391 | u64 bytes_readonly; /* total bytes that are read only */ | |
392 | ||
393 | u64 max_extent_size; /* This will hold the maximum extent size of | |
394 | the space info if we had an ENOSPC in the | |
395 | allocator. */ | |
396 | ||
397 | unsigned int full:1; /* indicates that we cannot allocate any more | |
398 | chunks for this space */ | |
399 | unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ | |
400 | ||
401 | unsigned int flush:1; /* set if we are trying to make space */ | |
402 | ||
403 | unsigned int force_alloc; /* set if we need to force a chunk | |
404 | alloc for this space */ | |
405 | ||
406 | u64 disk_used; /* total bytes used on disk */ | |
407 | u64 disk_total; /* total bytes on disk, takes mirrors into | |
408 | account */ | |
409 | ||
410 | u64 flags; | |
411 | ||
412 | /* | |
413 | * bytes_pinned is kept in line with what is actually pinned, as in | |
414 | * we've called update_block_group and dropped the bytes_used counter | |
415 | * and increased the bytes_pinned counter. However this means that | |
416 | * bytes_pinned does not reflect the bytes that will be pinned once the | |
417 | * delayed refs are flushed, so this counter is inc'ed every time we | |
418 | * call btrfs_free_extent so it is a realtime count of what will be | |
419 | * freed once the transaction is committed. It will be zeroed every | |
420 | * time the transaction commits. | |
421 | */ | |
422 | struct percpu_counter total_bytes_pinned; | |
423 | ||
424 | struct list_head list; | |
425 | /* Protected by the spinlock 'lock'. */ | |
426 | struct list_head ro_bgs; | |
427 | struct list_head priority_tickets; | |
428 | struct list_head tickets; | |
429 | /* | |
430 | * tickets_id just indicates the next ticket will be handled, so note | |
431 | * it's not stored per ticket. | |
432 | */ | |
433 | u64 tickets_id; | |
434 | ||
435 | struct rw_semaphore groups_sem; | |
436 | /* for block groups in our same type */ | |
437 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; | |
438 | wait_queue_head_t wait; | |
439 | ||
440 | struct kobject kobj; | |
441 | struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; | |
442 | }; | |
443 | ||
444 | #define BTRFS_BLOCK_RSV_GLOBAL 1 | |
445 | #define BTRFS_BLOCK_RSV_DELALLOC 2 | |
446 | #define BTRFS_BLOCK_RSV_TRANS 3 | |
447 | #define BTRFS_BLOCK_RSV_CHUNK 4 | |
448 | #define BTRFS_BLOCK_RSV_DELOPS 5 | |
449 | #define BTRFS_BLOCK_RSV_EMPTY 6 | |
450 | #define BTRFS_BLOCK_RSV_TEMP 7 | |
451 | ||
452 | struct btrfs_block_rsv { | |
453 | u64 size; | |
454 | u64 reserved; | |
455 | struct btrfs_space_info *space_info; | |
456 | spinlock_t lock; | |
457 | unsigned short full; | |
458 | unsigned short type; | |
459 | unsigned short failfast; | |
460 | }; | |
461 | ||
462 | /* | |
463 | * free clusters are used to claim free space in relatively large chunks, | |
464 | * allowing us to do less seeky writes. They are used for all metadata | |
465 | * allocations and data allocations in ssd mode. | |
466 | */ | |
467 | struct btrfs_free_cluster { | |
468 | spinlock_t lock; | |
469 | spinlock_t refill_lock; | |
470 | struct rb_root root; | |
471 | ||
472 | /* largest extent in this cluster */ | |
473 | u64 max_size; | |
474 | ||
475 | /* first extent starting offset */ | |
476 | u64 window_start; | |
477 | ||
478 | /* We did a full search and couldn't create a cluster */ | |
479 | bool fragmented; | |
480 | ||
481 | struct btrfs_block_group_cache *block_group; | |
482 | /* | |
483 | * when a cluster is allocated from a block group, we put the | |
484 | * cluster onto a list in the block group so that it can | |
485 | * be freed before the block group is freed. | |
486 | */ | |
487 | struct list_head block_group_list; | |
488 | }; | |
489 | ||
490 | enum btrfs_caching_type { | |
491 | BTRFS_CACHE_NO = 0, | |
492 | BTRFS_CACHE_STARTED = 1, | |
493 | BTRFS_CACHE_FAST = 2, | |
494 | BTRFS_CACHE_FINISHED = 3, | |
495 | BTRFS_CACHE_ERROR = 4, | |
496 | }; | |
497 | ||
498 | enum btrfs_disk_cache_state { | |
499 | BTRFS_DC_WRITTEN = 0, | |
500 | BTRFS_DC_ERROR = 1, | |
501 | BTRFS_DC_CLEAR = 2, | |
502 | BTRFS_DC_SETUP = 3, | |
503 | }; | |
504 | ||
505 | struct btrfs_caching_control { | |
506 | struct list_head list; | |
507 | struct mutex mutex; | |
508 | wait_queue_head_t wait; | |
509 | struct btrfs_work work; | |
510 | struct btrfs_block_group_cache *block_group; | |
511 | u64 progress; | |
512 | atomic_t count; | |
513 | }; | |
514 | ||
515 | /* Once caching_thread() finds this much free space, it will wake up waiters. */ | |
516 | #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2) | |
517 | ||
518 | struct btrfs_io_ctl { | |
519 | void *cur, *orig; | |
520 | struct page *page; | |
521 | struct page **pages; | |
522 | struct btrfs_fs_info *fs_info; | |
523 | struct inode *inode; | |
524 | unsigned long size; | |
525 | int index; | |
526 | int num_pages; | |
527 | int entries; | |
528 | int bitmaps; | |
529 | unsigned check_crcs:1; | |
530 | }; | |
531 | ||
532 | struct btrfs_block_group_cache { | |
533 | struct btrfs_key key; | |
534 | struct btrfs_block_group_item item; | |
535 | struct btrfs_fs_info *fs_info; | |
536 | struct inode *inode; | |
537 | spinlock_t lock; | |
538 | u64 pinned; | |
539 | u64 reserved; | |
540 | u64 delalloc_bytes; | |
541 | u64 bytes_super; | |
542 | u64 flags; | |
543 | u64 cache_generation; | |
544 | u32 sectorsize; | |
545 | ||
546 | /* | |
547 | * If the free space extent count exceeds this number, convert the block | |
548 | * group to bitmaps. | |
549 | */ | |
550 | u32 bitmap_high_thresh; | |
551 | ||
552 | /* | |
553 | * If the free space extent count drops below this number, convert the | |
554 | * block group back to extents. | |
555 | */ | |
556 | u32 bitmap_low_thresh; | |
557 | ||
558 | /* | |
559 | * It is just used for the delayed data space allocation because | |
560 | * only the data space allocation and the relative metadata update | |
561 | * can be done cross the transaction. | |
562 | */ | |
563 | struct rw_semaphore data_rwsem; | |
564 | ||
565 | /* for raid56, this is a full stripe, without parity */ | |
566 | unsigned long full_stripe_len; | |
567 | ||
568 | unsigned int ro; | |
569 | unsigned int iref:1; | |
570 | unsigned int has_caching_ctl:1; | |
571 | unsigned int removed:1; | |
572 | ||
573 | int disk_cache_state; | |
574 | ||
575 | /* cache tracking stuff */ | |
576 | int cached; | |
577 | struct btrfs_caching_control *caching_ctl; | |
578 | u64 last_byte_to_unpin; | |
579 | ||
580 | struct btrfs_space_info *space_info; | |
581 | ||
582 | /* free space cache stuff */ | |
583 | struct btrfs_free_space_ctl *free_space_ctl; | |
584 | ||
585 | /* block group cache stuff */ | |
586 | struct rb_node cache_node; | |
587 | ||
588 | /* for block groups in the same raid type */ | |
589 | struct list_head list; | |
590 | ||
591 | /* usage count */ | |
592 | atomic_t count; | |
593 | ||
594 | /* List of struct btrfs_free_clusters for this block group. | |
595 | * Today it will only have one thing on it, but that may change | |
596 | */ | |
597 | struct list_head cluster_list; | |
598 | ||
599 | /* For delayed block group creation or deletion of empty block groups */ | |
600 | struct list_head bg_list; | |
601 | ||
602 | /* For read-only block groups */ | |
603 | struct list_head ro_list; | |
604 | ||
605 | atomic_t trimming; | |
606 | ||
607 | /* For dirty block groups */ | |
608 | struct list_head dirty_list; | |
609 | struct list_head io_list; | |
610 | ||
611 | struct btrfs_io_ctl io_ctl; | |
612 | ||
613 | /* | |
614 | * Incremented when doing extent allocations and holding a read lock | |
615 | * on the space_info's groups_sem semaphore. | |
616 | * Decremented when an ordered extent that represents an IO against this | |
617 | * block group's range is created (after it's added to its inode's | |
618 | * root's list of ordered extents) or immediately after the allocation | |
619 | * if it's a metadata extent or fallocate extent (for these cases we | |
620 | * don't create ordered extents). | |
621 | */ | |
622 | atomic_t reservations; | |
623 | ||
624 | /* | |
625 | * Incremented while holding the spinlock *lock* by a task checking if | |
626 | * it can perform a nocow write (incremented if the value for the *ro* | |
627 | * field is 0). Decremented by such tasks once they create an ordered | |
628 | * extent or before that if some error happens before reaching that step. | |
629 | * This is to prevent races between block group relocation and nocow | |
630 | * writes through direct IO. | |
631 | */ | |
632 | atomic_t nocow_writers; | |
633 | ||
634 | /* Lock for free space tree operations. */ | |
635 | struct mutex free_space_lock; | |
636 | ||
637 | /* | |
638 | * Does the block group need to be added to the free space tree? | |
639 | * Protected by free_space_lock. | |
640 | */ | |
641 | int needs_free_space; | |
642 | }; | |
643 | ||
644 | /* delayed seq elem */ | |
645 | struct seq_list { | |
646 | struct list_head list; | |
647 | u64 seq; | |
648 | }; | |
649 | ||
650 | #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } | |
651 | ||
652 | enum btrfs_orphan_cleanup_state { | |
653 | ORPHAN_CLEANUP_STARTED = 1, | |
654 | ORPHAN_CLEANUP_DONE = 2, | |
655 | }; | |
656 | ||
657 | /* used by the raid56 code to lock stripes for read/modify/write */ | |
658 | struct btrfs_stripe_hash { | |
659 | struct list_head hash_list; | |
660 | wait_queue_head_t wait; | |
661 | spinlock_t lock; | |
662 | }; | |
663 | ||
664 | /* used by the raid56 code to lock stripes for read/modify/write */ | |
665 | struct btrfs_stripe_hash_table { | |
666 | struct list_head stripe_cache; | |
667 | spinlock_t cache_lock; | |
668 | int cache_size; | |
669 | struct btrfs_stripe_hash table[]; | |
670 | }; | |
671 | ||
672 | #define BTRFS_STRIPE_HASH_TABLE_BITS 11 | |
673 | ||
674 | void btrfs_init_async_reclaim_work(struct work_struct *work); | |
675 | ||
676 | /* fs_info */ | |
677 | struct reloc_control; | |
678 | struct btrfs_device; | |
679 | struct btrfs_fs_devices; | |
680 | struct btrfs_balance_control; | |
681 | struct btrfs_delayed_root; | |
682 | ||
683 | #define BTRFS_FS_BARRIER 1 | |
684 | #define BTRFS_FS_CLOSING_START 2 | |
685 | #define BTRFS_FS_CLOSING_DONE 3 | |
686 | #define BTRFS_FS_LOG_RECOVERING 4 | |
687 | #define BTRFS_FS_OPEN 5 | |
688 | #define BTRFS_FS_QUOTA_ENABLED 6 | |
689 | #define BTRFS_FS_QUOTA_ENABLING 7 | |
690 | #define BTRFS_FS_QUOTA_DISABLING 8 | |
691 | #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 | |
692 | #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 | |
693 | #define BTRFS_FS_BTREE_ERR 11 | |
694 | #define BTRFS_FS_LOG1_ERR 12 | |
695 | #define BTRFS_FS_LOG2_ERR 13 | |
696 | ||
697 | struct btrfs_fs_info { | |
698 | u8 fsid[BTRFS_FSID_SIZE]; | |
699 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; | |
700 | unsigned long flags; | |
701 | struct btrfs_root *extent_root; | |
702 | struct btrfs_root *tree_root; | |
703 | struct btrfs_root *chunk_root; | |
704 | struct btrfs_root *dev_root; | |
705 | struct btrfs_root *fs_root; | |
706 | struct btrfs_root *csum_root; | |
707 | struct btrfs_root *quota_root; | |
708 | struct btrfs_root *uuid_root; | |
709 | struct btrfs_root *free_space_root; | |
710 | ||
711 | /* the log root tree is a directory of all the other log roots */ | |
712 | struct btrfs_root *log_root_tree; | |
713 | ||
714 | spinlock_t fs_roots_radix_lock; | |
715 | struct radix_tree_root fs_roots_radix; | |
716 | ||
717 | /* block group cache stuff */ | |
718 | spinlock_t block_group_cache_lock; | |
719 | u64 first_logical_byte; | |
720 | struct rb_root block_group_cache_tree; | |
721 | ||
722 | /* keep track of unallocated space */ | |
723 | spinlock_t free_chunk_lock; | |
724 | u64 free_chunk_space; | |
725 | ||
726 | struct extent_io_tree freed_extents[2]; | |
727 | struct extent_io_tree *pinned_extents; | |
728 | ||
729 | /* logical->physical extent mapping */ | |
730 | struct btrfs_mapping_tree mapping_tree; | |
731 | ||
732 | /* | |
733 | * block reservation for extent, checksum, root tree and | |
734 | * delayed dir index item | |
735 | */ | |
736 | struct btrfs_block_rsv global_block_rsv; | |
737 | /* block reservation for delay allocation */ | |
738 | struct btrfs_block_rsv delalloc_block_rsv; | |
739 | /* block reservation for metadata operations */ | |
740 | struct btrfs_block_rsv trans_block_rsv; | |
741 | /* block reservation for chunk tree */ | |
742 | struct btrfs_block_rsv chunk_block_rsv; | |
743 | /* block reservation for delayed operations */ | |
744 | struct btrfs_block_rsv delayed_block_rsv; | |
745 | ||
746 | struct btrfs_block_rsv empty_block_rsv; | |
747 | ||
748 | u64 generation; | |
749 | u64 last_trans_committed; | |
750 | u64 avg_delayed_ref_runtime; | |
751 | ||
752 | /* | |
753 | * this is updated to the current trans every time a full commit | |
754 | * is required instead of the faster short fsync log commits | |
755 | */ | |
756 | u64 last_trans_log_full_commit; | |
757 | unsigned long mount_opt; | |
758 | /* | |
759 | * Track requests for actions that need to be done during transaction | |
760 | * commit (like for some mount options). | |
761 | */ | |
762 | unsigned long pending_changes; | |
763 | unsigned long compress_type:4; | |
764 | int commit_interval; | |
765 | /* | |
766 | * It is a suggestive number, the read side is safe even it gets a | |
767 | * wrong number because we will write out the data into a regular | |
768 | * extent. The write side(mount/remount) is under ->s_umount lock, | |
769 | * so it is also safe. | |
770 | */ | |
771 | u64 max_inline; | |
772 | /* | |
773 | * Protected by ->chunk_mutex and sb->s_umount. | |
774 | * | |
775 | * The reason that we use two lock to protect it is because only | |
776 | * remount and mount operations can change it and these two operations | |
777 | * are under sb->s_umount, but the read side (chunk allocation) can not | |
778 | * acquire sb->s_umount or the deadlock would happen. So we use two | |
779 | * locks to protect it. On the write side, we must acquire two locks, | |
780 | * and on the read side, we just need acquire one of them. | |
781 | */ | |
782 | u64 alloc_start; | |
783 | struct btrfs_transaction *running_transaction; | |
784 | wait_queue_head_t transaction_throttle; | |
785 | wait_queue_head_t transaction_wait; | |
786 | wait_queue_head_t transaction_blocked_wait; | |
787 | wait_queue_head_t async_submit_wait; | |
788 | ||
789 | /* | |
790 | * Used to protect the incompat_flags, compat_flags, compat_ro_flags | |
791 | * when they are updated. | |
792 | * | |
793 | * Because we do not clear the flags for ever, so we needn't use | |
794 | * the lock on the read side. | |
795 | * | |
796 | * We also needn't use the lock when we mount the fs, because | |
797 | * there is no other task which will update the flag. | |
798 | */ | |
799 | spinlock_t super_lock; | |
800 | struct btrfs_super_block *super_copy; | |
801 | struct btrfs_super_block *super_for_commit; | |
802 | struct super_block *sb; | |
803 | struct inode *btree_inode; | |
804 | struct backing_dev_info bdi; | |
805 | struct mutex tree_log_mutex; | |
806 | struct mutex transaction_kthread_mutex; | |
807 | struct mutex cleaner_mutex; | |
808 | struct mutex chunk_mutex; | |
809 | struct mutex volume_mutex; | |
810 | ||
811 | /* | |
812 | * this is taken to make sure we don't set block groups ro after | |
813 | * the free space cache has been allocated on them | |
814 | */ | |
815 | struct mutex ro_block_group_mutex; | |
816 | ||
817 | /* this is used during read/modify/write to make sure | |
818 | * no two ios are trying to mod the same stripe at the same | |
819 | * time | |
820 | */ | |
821 | struct btrfs_stripe_hash_table *stripe_hash_table; | |
822 | ||
823 | /* | |
824 | * this protects the ordered operations list only while we are | |
825 | * processing all of the entries on it. This way we make | |
826 | * sure the commit code doesn't find the list temporarily empty | |
827 | * because another function happens to be doing non-waiting preflush | |
828 | * before jumping into the main commit. | |
829 | */ | |
830 | struct mutex ordered_operations_mutex; | |
831 | ||
832 | struct rw_semaphore commit_root_sem; | |
833 | ||
834 | struct rw_semaphore cleanup_work_sem; | |
835 | ||
836 | struct rw_semaphore subvol_sem; | |
837 | struct srcu_struct subvol_srcu; | |
838 | ||
839 | spinlock_t trans_lock; | |
840 | /* | |
841 | * the reloc mutex goes with the trans lock, it is taken | |
842 | * during commit to protect us from the relocation code | |
843 | */ | |
844 | struct mutex reloc_mutex; | |
845 | ||
846 | struct list_head trans_list; | |
847 | struct list_head dead_roots; | |
848 | struct list_head caching_block_groups; | |
849 | ||
850 | spinlock_t delayed_iput_lock; | |
851 | struct list_head delayed_iputs; | |
852 | struct mutex cleaner_delayed_iput_mutex; | |
853 | ||
854 | /* this protects tree_mod_seq_list */ | |
855 | spinlock_t tree_mod_seq_lock; | |
856 | atomic64_t tree_mod_seq; | |
857 | struct list_head tree_mod_seq_list; | |
858 | ||
859 | /* this protects tree_mod_log */ | |
860 | rwlock_t tree_mod_log_lock; | |
861 | struct rb_root tree_mod_log; | |
862 | ||
863 | atomic_t nr_async_submits; | |
864 | atomic_t async_submit_draining; | |
865 | atomic_t nr_async_bios; | |
866 | atomic_t async_delalloc_pages; | |
867 | atomic_t open_ioctl_trans; | |
868 | ||
869 | /* | |
870 | * this is used to protect the following list -- ordered_roots. | |
871 | */ | |
872 | spinlock_t ordered_root_lock; | |
873 | ||
874 | /* | |
875 | * all fs/file tree roots in which there are data=ordered extents | |
876 | * pending writeback are added into this list. | |
877 | * | |
878 | * these can span multiple transactions and basically include | |
879 | * every dirty data page that isn't from nodatacow | |
880 | */ | |
881 | struct list_head ordered_roots; | |
882 | ||
883 | struct mutex delalloc_root_mutex; | |
884 | spinlock_t delalloc_root_lock; | |
885 | /* all fs/file tree roots that have delalloc inodes. */ | |
886 | struct list_head delalloc_roots; | |
887 | ||
888 | /* | |
889 | * there is a pool of worker threads for checksumming during writes | |
890 | * and a pool for checksumming after reads. This is because readers | |
891 | * can run with FS locks held, and the writers may be waiting for | |
892 | * those locks. We don't want ordering in the pending list to cause | |
893 | * deadlocks, and so the two are serviced separately. | |
894 | * | |
895 | * A third pool does submit_bio to avoid deadlocking with the other | |
896 | * two | |
897 | */ | |
898 | struct btrfs_workqueue *workers; | |
899 | struct btrfs_workqueue *delalloc_workers; | |
900 | struct btrfs_workqueue *flush_workers; | |
901 | struct btrfs_workqueue *endio_workers; | |
902 | struct btrfs_workqueue *endio_meta_workers; | |
903 | struct btrfs_workqueue *endio_raid56_workers; | |
904 | struct btrfs_workqueue *endio_repair_workers; | |
905 | struct btrfs_workqueue *rmw_workers; | |
906 | struct btrfs_workqueue *endio_meta_write_workers; | |
907 | struct btrfs_workqueue *endio_write_workers; | |
908 | struct btrfs_workqueue *endio_freespace_worker; | |
909 | struct btrfs_workqueue *submit_workers; | |
910 | struct btrfs_workqueue *caching_workers; | |
911 | struct btrfs_workqueue *readahead_workers; | |
912 | ||
913 | /* | |
914 | * fixup workers take dirty pages that didn't properly go through | |
915 | * the cow mechanism and make them safe to write. It happens | |
916 | * for the sys_munmap function call path | |
917 | */ | |
918 | struct btrfs_workqueue *fixup_workers; | |
919 | struct btrfs_workqueue *delayed_workers; | |
920 | ||
921 | /* the extent workers do delayed refs on the extent allocation tree */ | |
922 | struct btrfs_workqueue *extent_workers; | |
923 | struct task_struct *transaction_kthread; | |
924 | struct task_struct *cleaner_kthread; | |
925 | int thread_pool_size; | |
926 | ||
927 | struct kobject *space_info_kobj; | |
928 | ||
929 | u64 total_pinned; | |
930 | ||
931 | /* used to keep from writing metadata until there is a nice batch */ | |
932 | struct percpu_counter dirty_metadata_bytes; | |
933 | struct percpu_counter delalloc_bytes; | |
934 | s32 dirty_metadata_batch; | |
935 | s32 delalloc_batch; | |
936 | ||
937 | struct list_head dirty_cowonly_roots; | |
938 | ||
939 | struct btrfs_fs_devices *fs_devices; | |
940 | ||
941 | /* | |
942 | * the space_info list is almost entirely read only. It only changes | |
943 | * when we add a new raid type to the FS, and that happens | |
944 | * very rarely. RCU is used to protect it. | |
945 | */ | |
946 | struct list_head space_info; | |
947 | ||
948 | struct btrfs_space_info *data_sinfo; | |
949 | ||
950 | struct reloc_control *reloc_ctl; | |
951 | ||
952 | /* data_alloc_cluster is only used in ssd mode */ | |
953 | struct btrfs_free_cluster data_alloc_cluster; | |
954 | ||
955 | /* all metadata allocations go through this cluster */ | |
956 | struct btrfs_free_cluster meta_alloc_cluster; | |
957 | ||
958 | /* auto defrag inodes go here */ | |
959 | spinlock_t defrag_inodes_lock; | |
960 | struct rb_root defrag_inodes; | |
961 | atomic_t defrag_running; | |
962 | ||
963 | /* Used to protect avail_{data, metadata, system}_alloc_bits */ | |
964 | seqlock_t profiles_lock; | |
965 | /* | |
966 | * these three are in extended format (availability of single | |
967 | * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other | |
968 | * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) | |
969 | */ | |
970 | u64 avail_data_alloc_bits; | |
971 | u64 avail_metadata_alloc_bits; | |
972 | u64 avail_system_alloc_bits; | |
973 | ||
974 | /* restriper state */ | |
975 | spinlock_t balance_lock; | |
976 | struct mutex balance_mutex; | |
977 | atomic_t balance_running; | |
978 | atomic_t balance_pause_req; | |
979 | atomic_t balance_cancel_req; | |
980 | struct btrfs_balance_control *balance_ctl; | |
981 | wait_queue_head_t balance_wait_q; | |
982 | ||
983 | unsigned data_chunk_allocations; | |
984 | unsigned metadata_ratio; | |
985 | ||
986 | void *bdev_holder; | |
987 | ||
988 | /* private scrub information */ | |
989 | struct mutex scrub_lock; | |
990 | atomic_t scrubs_running; | |
991 | atomic_t scrub_pause_req; | |
992 | atomic_t scrubs_paused; | |
993 | atomic_t scrub_cancel_req; | |
994 | wait_queue_head_t scrub_pause_wait; | |
995 | int scrub_workers_refcnt; | |
996 | struct btrfs_workqueue *scrub_workers; | |
997 | struct btrfs_workqueue *scrub_wr_completion_workers; | |
998 | struct btrfs_workqueue *scrub_nocow_workers; | |
999 | struct btrfs_workqueue *scrub_parity_workers; | |
1000 | ||
1001 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY | |
1002 | u32 check_integrity_print_mask; | |
1003 | #endif | |
1004 | /* is qgroup tracking in a consistent state? */ | |
1005 | u64 qgroup_flags; | |
1006 | ||
1007 | /* holds configuration and tracking. Protected by qgroup_lock */ | |
1008 | struct rb_root qgroup_tree; | |
1009 | struct rb_root qgroup_op_tree; | |
1010 | spinlock_t qgroup_lock; | |
1011 | spinlock_t qgroup_op_lock; | |
1012 | atomic_t qgroup_op_seq; | |
1013 | ||
1014 | /* | |
1015 | * used to avoid frequently calling ulist_alloc()/ulist_free() | |
1016 | * when doing qgroup accounting, it must be protected by qgroup_lock. | |
1017 | */ | |
1018 | struct ulist *qgroup_ulist; | |
1019 | ||
1020 | /* protect user change for quota operations */ | |
1021 | struct mutex qgroup_ioctl_lock; | |
1022 | ||
1023 | /* list of dirty qgroups to be written at next commit */ | |
1024 | struct list_head dirty_qgroups; | |
1025 | ||
1026 | /* used by qgroup for an efficient tree traversal */ | |
1027 | u64 qgroup_seq; | |
1028 | ||
1029 | /* qgroup rescan items */ | |
1030 | struct mutex qgroup_rescan_lock; /* protects the progress item */ | |
1031 | struct btrfs_key qgroup_rescan_progress; | |
1032 | struct btrfs_workqueue *qgroup_rescan_workers; | |
1033 | struct completion qgroup_rescan_completion; | |
1034 | struct btrfs_work qgroup_rescan_work; | |
1035 | bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ | |
1036 | ||
1037 | /* filesystem state */ | |
1038 | unsigned long fs_state; | |
1039 | ||
1040 | struct btrfs_delayed_root *delayed_root; | |
1041 | ||
1042 | /* readahead tree */ | |
1043 | spinlock_t reada_lock; | |
1044 | struct radix_tree_root reada_tree; | |
1045 | ||
1046 | /* readahead works cnt */ | |
1047 | atomic_t reada_works_cnt; | |
1048 | ||
1049 | /* Extent buffer radix tree */ | |
1050 | spinlock_t buffer_lock; | |
1051 | struct radix_tree_root buffer_radix; | |
1052 | ||
1053 | /* next backup root to be overwritten */ | |
1054 | int backup_root_index; | |
1055 | ||
1056 | int num_tolerated_disk_barrier_failures; | |
1057 | ||
1058 | /* device replace state */ | |
1059 | struct btrfs_dev_replace dev_replace; | |
1060 | ||
1061 | atomic_t mutually_exclusive_operation_running; | |
1062 | ||
1063 | struct percpu_counter bio_counter; | |
1064 | wait_queue_head_t replace_wait; | |
1065 | ||
1066 | struct semaphore uuid_tree_rescan_sem; | |
1067 | ||
1068 | /* Used to reclaim the metadata space in the background. */ | |
1069 | struct work_struct async_reclaim_work; | |
1070 | ||
1071 | spinlock_t unused_bgs_lock; | |
1072 | struct list_head unused_bgs; | |
1073 | struct mutex unused_bg_unpin_mutex; | |
1074 | struct mutex delete_unused_bgs_mutex; | |
1075 | ||
1076 | /* For btrfs to record security options */ | |
1077 | struct security_mnt_opts security_opts; | |
1078 | ||
1079 | /* | |
1080 | * Chunks that can't be freed yet (under a trim/discard operation) | |
1081 | * and will be latter freed. Protected by fs_info->chunk_mutex. | |
1082 | */ | |
1083 | struct list_head pinned_chunks; | |
1084 | ||
1085 | /* Used to record internally whether fs has been frozen */ | |
1086 | int fs_frozen; | |
1087 | ||
1088 | /* Cached block sizes */ | |
1089 | u32 nodesize; | |
1090 | u32 sectorsize; | |
1091 | u32 stripesize; | |
1092 | }; | |
1093 | ||
1094 | static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) | |
1095 | { | |
1096 | return sb->s_fs_info; | |
1097 | } | |
1098 | ||
1099 | struct btrfs_subvolume_writers { | |
1100 | struct percpu_counter counter; | |
1101 | wait_queue_head_t wait; | |
1102 | }; | |
1103 | ||
1104 | /* | |
1105 | * The state of btrfs root | |
1106 | */ | |
1107 | /* | |
1108 | * btrfs_record_root_in_trans is a multi-step process, | |
1109 | * and it can race with the balancing code. But the | |
1110 | * race is very small, and only the first time the root | |
1111 | * is added to each transaction. So IN_TRANS_SETUP | |
1112 | * is used to tell us when more checks are required | |
1113 | */ | |
1114 | #define BTRFS_ROOT_IN_TRANS_SETUP 0 | |
1115 | #define BTRFS_ROOT_REF_COWS 1 | |
1116 | #define BTRFS_ROOT_TRACK_DIRTY 2 | |
1117 | #define BTRFS_ROOT_IN_RADIX 3 | |
1118 | #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 | |
1119 | #define BTRFS_ROOT_DEFRAG_RUNNING 5 | |
1120 | #define BTRFS_ROOT_FORCE_COW 6 | |
1121 | #define BTRFS_ROOT_MULTI_LOG_TASKS 7 | |
1122 | #define BTRFS_ROOT_DIRTY 8 | |
1123 | ||
1124 | /* | |
1125 | * in ram representation of the tree. extent_root is used for all allocations | |
1126 | * and for the extent tree extent_root root. | |
1127 | */ | |
1128 | struct btrfs_root { | |
1129 | struct extent_buffer *node; | |
1130 | ||
1131 | struct extent_buffer *commit_root; | |
1132 | struct btrfs_root *log_root; | |
1133 | struct btrfs_root *reloc_root; | |
1134 | ||
1135 | unsigned long state; | |
1136 | struct btrfs_root_item root_item; | |
1137 | struct btrfs_key root_key; | |
1138 | struct btrfs_fs_info *fs_info; | |
1139 | struct extent_io_tree dirty_log_pages; | |
1140 | ||
1141 | struct mutex objectid_mutex; | |
1142 | ||
1143 | spinlock_t accounting_lock; | |
1144 | struct btrfs_block_rsv *block_rsv; | |
1145 | ||
1146 | /* free ino cache stuff */ | |
1147 | struct btrfs_free_space_ctl *free_ino_ctl; | |
1148 | enum btrfs_caching_type ino_cache_state; | |
1149 | spinlock_t ino_cache_lock; | |
1150 | wait_queue_head_t ino_cache_wait; | |
1151 | struct btrfs_free_space_ctl *free_ino_pinned; | |
1152 | u64 ino_cache_progress; | |
1153 | struct inode *ino_cache_inode; | |
1154 | ||
1155 | struct mutex log_mutex; | |
1156 | wait_queue_head_t log_writer_wait; | |
1157 | wait_queue_head_t log_commit_wait[2]; | |
1158 | struct list_head log_ctxs[2]; | |
1159 | atomic_t log_writers; | |
1160 | atomic_t log_commit[2]; | |
1161 | atomic_t log_batch; | |
1162 | int log_transid; | |
1163 | /* No matter the commit succeeds or not*/ | |
1164 | int log_transid_committed; | |
1165 | /* Just be updated when the commit succeeds. */ | |
1166 | int last_log_commit; | |
1167 | pid_t log_start_pid; | |
1168 | ||
1169 | u64 objectid; | |
1170 | u64 last_trans; | |
1171 | ||
1172 | u32 type; | |
1173 | ||
1174 | u64 highest_objectid; | |
1175 | ||
1176 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
1177 | /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ | |
1178 | u64 alloc_bytenr; | |
1179 | #endif | |
1180 | ||
1181 | u64 defrag_trans_start; | |
1182 | struct btrfs_key defrag_progress; | |
1183 | struct btrfs_key defrag_max; | |
1184 | char *name; | |
1185 | ||
1186 | /* the dirty list is only used by non-reference counted roots */ | |
1187 | struct list_head dirty_list; | |
1188 | ||
1189 | struct list_head root_list; | |
1190 | ||
1191 | spinlock_t log_extents_lock[2]; | |
1192 | struct list_head logged_list[2]; | |
1193 | ||
1194 | spinlock_t orphan_lock; | |
1195 | atomic_t orphan_inodes; | |
1196 | struct btrfs_block_rsv *orphan_block_rsv; | |
1197 | int orphan_cleanup_state; | |
1198 | ||
1199 | spinlock_t inode_lock; | |
1200 | /* red-black tree that keeps track of in-memory inodes */ | |
1201 | struct rb_root inode_tree; | |
1202 | ||
1203 | /* | |
1204 | * radix tree that keeps track of delayed nodes of every inode, | |
1205 | * protected by inode_lock | |
1206 | */ | |
1207 | struct radix_tree_root delayed_nodes_tree; | |
1208 | /* | |
1209 | * right now this just gets used so that a root has its own devid | |
1210 | * for stat. It may be used for more later | |
1211 | */ | |
1212 | dev_t anon_dev; | |
1213 | ||
1214 | spinlock_t root_item_lock; | |
1215 | atomic_t refs; | |
1216 | ||
1217 | struct mutex delalloc_mutex; | |
1218 | spinlock_t delalloc_lock; | |
1219 | /* | |
1220 | * all of the inodes that have delalloc bytes. It is possible for | |
1221 | * this list to be empty even when there is still dirty data=ordered | |
1222 | * extents waiting to finish IO. | |
1223 | */ | |
1224 | struct list_head delalloc_inodes; | |
1225 | struct list_head delalloc_root; | |
1226 | u64 nr_delalloc_inodes; | |
1227 | ||
1228 | struct mutex ordered_extent_mutex; | |
1229 | /* | |
1230 | * this is used by the balancing code to wait for all the pending | |
1231 | * ordered extents | |
1232 | */ | |
1233 | spinlock_t ordered_extent_lock; | |
1234 | ||
1235 | /* | |
1236 | * all of the data=ordered extents pending writeback | |
1237 | * these can span multiple transactions and basically include | |
1238 | * every dirty data page that isn't from nodatacow | |
1239 | */ | |
1240 | struct list_head ordered_extents; | |
1241 | struct list_head ordered_root; | |
1242 | u64 nr_ordered_extents; | |
1243 | ||
1244 | /* | |
1245 | * Number of currently running SEND ioctls to prevent | |
1246 | * manipulation with the read-only status via SUBVOL_SETFLAGS | |
1247 | */ | |
1248 | int send_in_progress; | |
1249 | struct btrfs_subvolume_writers *subv_writers; | |
1250 | atomic_t will_be_snapshoted; | |
1251 | ||
1252 | /* For qgroup metadata space reserve */ | |
1253 | atomic_t qgroup_meta_rsv; | |
1254 | }; | |
1255 | static inline u32 btrfs_inode_sectorsize(const struct inode *inode) | |
1256 | { | |
1257 | return btrfs_sb(inode->i_sb)->sectorsize; | |
1258 | } | |
1259 | ||
1260 | static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize) | |
1261 | { | |
1262 | return blocksize - sizeof(struct btrfs_header); | |
1263 | } | |
1264 | ||
1265 | static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) | |
1266 | { | |
1267 | return __BTRFS_LEAF_DATA_SIZE(info->nodesize); | |
1268 | } | |
1269 | ||
1270 | static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) | |
1271 | { | |
1272 | return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); | |
1273 | } | |
1274 | ||
1275 | static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) | |
1276 | { | |
1277 | return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); | |
1278 | } | |
1279 | ||
1280 | #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ | |
1281 | (offsetof(struct btrfs_file_extent_item, disk_bytenr)) | |
1282 | static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) | |
1283 | { | |
1284 | return BTRFS_MAX_ITEM_SIZE(info) - | |
1285 | BTRFS_FILE_EXTENT_INLINE_DATA_START; | |
1286 | } | |
1287 | ||
1288 | static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) | |
1289 | { | |
1290 | return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * Flags for mount options. | |
1295 | * | |
1296 | * Note: don't forget to add new options to btrfs_show_options() | |
1297 | */ | |
1298 | #define BTRFS_MOUNT_NODATASUM (1 << 0) | |
1299 | #define BTRFS_MOUNT_NODATACOW (1 << 1) | |
1300 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) | |
1301 | #define BTRFS_MOUNT_SSD (1 << 3) | |
1302 | #define BTRFS_MOUNT_DEGRADED (1 << 4) | |
1303 | #define BTRFS_MOUNT_COMPRESS (1 << 5) | |
1304 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) | |
1305 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) | |
1306 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) | |
1307 | #define BTRFS_MOUNT_NOSSD (1 << 9) | |
1308 | #define BTRFS_MOUNT_DISCARD (1 << 10) | |
1309 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) | |
1310 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) | |
1311 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) | |
1312 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) | |
1313 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) | |
1314 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) | |
1315 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) | |
1316 | #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) | |
1317 | #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) | |
1318 | #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) | |
1319 | #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) | |
1320 | #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) | |
1321 | #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) | |
1322 | #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) | |
1323 | #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) | |
1324 | #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) | |
1325 | #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) | |
1326 | ||
1327 | #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) | |
1328 | #define BTRFS_DEFAULT_MAX_INLINE (2048) | |
1329 | ||
1330 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) | |
1331 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) | |
1332 | #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) | |
1333 | #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ | |
1334 | BTRFS_MOUNT_##opt) | |
1335 | ||
1336 | #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ | |
1337 | { \ | |
1338 | if (!btrfs_test_opt(fs_info, opt)) \ | |
1339 | btrfs_info(fs_info, fmt, ##args); \ | |
1340 | btrfs_set_opt(fs_info->mount_opt, opt); \ | |
1341 | } | |
1342 | ||
1343 | #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ | |
1344 | { \ | |
1345 | if (btrfs_test_opt(fs_info, opt)) \ | |
1346 | btrfs_info(fs_info, fmt, ##args); \ | |
1347 | btrfs_clear_opt(fs_info->mount_opt, opt); \ | |
1348 | } | |
1349 | ||
1350 | #ifdef CONFIG_BTRFS_DEBUG | |
1351 | static inline int | |
1352 | btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) | |
1353 | { | |
1354 | struct btrfs_fs_info *fs_info = block_group->fs_info; | |
1355 | ||
1356 | return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && | |
1357 | block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || | |
1358 | (btrfs_test_opt(fs_info, FRAGMENT_DATA) && | |
1359 | block_group->flags & BTRFS_BLOCK_GROUP_DATA); | |
1360 | } | |
1361 | #endif | |
1362 | ||
1363 | /* | |
1364 | * Requests for changes that need to be done during transaction commit. | |
1365 | * | |
1366 | * Internal mount options that are used for special handling of the real | |
1367 | * mount options (eg. cannot be set during remount and have to be set during | |
1368 | * transaction commit) | |
1369 | */ | |
1370 | ||
1371 | #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) | |
1372 | #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) | |
1373 | #define BTRFS_PENDING_COMMIT (2) | |
1374 | ||
1375 | #define btrfs_test_pending(info, opt) \ | |
1376 | test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) | |
1377 | #define btrfs_set_pending(info, opt) \ | |
1378 | set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) | |
1379 | #define btrfs_clear_pending(info, opt) \ | |
1380 | clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) | |
1381 | ||
1382 | /* | |
1383 | * Helpers for setting pending mount option changes. | |
1384 | * | |
1385 | * Expects corresponding macros | |
1386 | * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name | |
1387 | */ | |
1388 | #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ | |
1389 | do { \ | |
1390 | if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ | |
1391 | btrfs_info((info), fmt, ##args); \ | |
1392 | btrfs_set_pending((info), SET_##opt); \ | |
1393 | btrfs_clear_pending((info), CLEAR_##opt); \ | |
1394 | } \ | |
1395 | } while(0) | |
1396 | ||
1397 | #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ | |
1398 | do { \ | |
1399 | if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ | |
1400 | btrfs_info((info), fmt, ##args); \ | |
1401 | btrfs_set_pending((info), CLEAR_##opt); \ | |
1402 | btrfs_clear_pending((info), SET_##opt); \ | |
1403 | } \ | |
1404 | } while(0) | |
1405 | ||
1406 | /* | |
1407 | * Inode flags | |
1408 | */ | |
1409 | #define BTRFS_INODE_NODATASUM (1 << 0) | |
1410 | #define BTRFS_INODE_NODATACOW (1 << 1) | |
1411 | #define BTRFS_INODE_READONLY (1 << 2) | |
1412 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) | |
1413 | #define BTRFS_INODE_PREALLOC (1 << 4) | |
1414 | #define BTRFS_INODE_SYNC (1 << 5) | |
1415 | #define BTRFS_INODE_IMMUTABLE (1 << 6) | |
1416 | #define BTRFS_INODE_APPEND (1 << 7) | |
1417 | #define BTRFS_INODE_NODUMP (1 << 8) | |
1418 | #define BTRFS_INODE_NOATIME (1 << 9) | |
1419 | #define BTRFS_INODE_DIRSYNC (1 << 10) | |
1420 | #define BTRFS_INODE_COMPRESS (1 << 11) | |
1421 | ||
1422 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) | |
1423 | ||
1424 | struct btrfs_map_token { | |
1425 | struct extent_buffer *eb; | |
1426 | char *kaddr; | |
1427 | unsigned long offset; | |
1428 | }; | |
1429 | ||
1430 | #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ | |
1431 | ((bytes) >> (fs_info)->sb->s_blocksize_bits) | |
1432 | ||
1433 | static inline void btrfs_init_map_token (struct btrfs_map_token *token) | |
1434 | { | |
1435 | token->kaddr = NULL; | |
1436 | } | |
1437 | ||
1438 | /* some macros to generate set/get functions for the struct fields. This | |
1439 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple | |
1440 | * one for u8: | |
1441 | */ | |
1442 | #define le8_to_cpu(v) (v) | |
1443 | #define cpu_to_le8(v) (v) | |
1444 | #define __le8 u8 | |
1445 | ||
1446 | #define read_eb_member(eb, ptr, type, member, result) (\ | |
1447 | read_extent_buffer(eb, (char *)(result), \ | |
1448 | ((unsigned long)(ptr)) + \ | |
1449 | offsetof(type, member), \ | |
1450 | sizeof(((type *)0)->member))) | |
1451 | ||
1452 | #define write_eb_member(eb, ptr, type, member, result) (\ | |
1453 | write_extent_buffer(eb, (char *)(result), \ | |
1454 | ((unsigned long)(ptr)) + \ | |
1455 | offsetof(type, member), \ | |
1456 | sizeof(((type *)0)->member))) | |
1457 | ||
1458 | #define DECLARE_BTRFS_SETGET_BITS(bits) \ | |
1459 | u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ | |
1460 | unsigned long off, \ | |
1461 | struct btrfs_map_token *token); \ | |
1462 | void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ | |
1463 | unsigned long off, u##bits val, \ | |
1464 | struct btrfs_map_token *token); \ | |
1465 | static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ | |
1466 | unsigned long off) \ | |
1467 | { \ | |
1468 | return btrfs_get_token_##bits(eb, ptr, off, NULL); \ | |
1469 | } \ | |
1470 | static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ | |
1471 | unsigned long off, u##bits val) \ | |
1472 | { \ | |
1473 | btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ | |
1474 | } | |
1475 | ||
1476 | DECLARE_BTRFS_SETGET_BITS(8) | |
1477 | DECLARE_BTRFS_SETGET_BITS(16) | |
1478 | DECLARE_BTRFS_SETGET_BITS(32) | |
1479 | DECLARE_BTRFS_SETGET_BITS(64) | |
1480 | ||
1481 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ | |
1482 | static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ | |
1483 | { \ | |
1484 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
1485 | return btrfs_get_##bits(eb, s, offsetof(type, member)); \ | |
1486 | } \ | |
1487 | static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ | |
1488 | u##bits val) \ | |
1489 | { \ | |
1490 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
1491 | btrfs_set_##bits(eb, s, offsetof(type, member), val); \ | |
1492 | } \ | |
1493 | static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \ | |
1494 | struct btrfs_map_token *token) \ | |
1495 | { \ | |
1496 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
1497 | return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ | |
1498 | } \ | |
1499 | static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ | |
1500 | type *s, u##bits val, \ | |
1501 | struct btrfs_map_token *token) \ | |
1502 | { \ | |
1503 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ | |
1504 | btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ | |
1505 | } | |
1506 | ||
1507 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ | |
1508 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ | |
1509 | { \ | |
1510 | type *p = page_address(eb->pages[0]); \ | |
1511 | u##bits res = le##bits##_to_cpu(p->member); \ | |
1512 | return res; \ | |
1513 | } \ | |
1514 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ | |
1515 | u##bits val) \ | |
1516 | { \ | |
1517 | type *p = page_address(eb->pages[0]); \ | |
1518 | p->member = cpu_to_le##bits(val); \ | |
1519 | } | |
1520 | ||
1521 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ | |
1522 | static inline u##bits btrfs_##name(type *s) \ | |
1523 | { \ | |
1524 | return le##bits##_to_cpu(s->member); \ | |
1525 | } \ | |
1526 | static inline void btrfs_set_##name(type *s, u##bits val) \ | |
1527 | { \ | |
1528 | s->member = cpu_to_le##bits(val); \ | |
1529 | } | |
1530 | ||
1531 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); | |
1532 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); | |
1533 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); | |
1534 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); | |
1535 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); | |
1536 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, | |
1537 | start_offset, 64); | |
1538 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); | |
1539 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); | |
1540 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); | |
1541 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); | |
1542 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); | |
1543 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); | |
1544 | ||
1545 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); | |
1546 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, | |
1547 | total_bytes, 64); | |
1548 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, | |
1549 | bytes_used, 64); | |
1550 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, | |
1551 | io_align, 32); | |
1552 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, | |
1553 | io_width, 32); | |
1554 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, | |
1555 | sector_size, 32); | |
1556 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); | |
1557 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, | |
1558 | dev_group, 32); | |
1559 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, | |
1560 | seek_speed, 8); | |
1561 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, | |
1562 | bandwidth, 8); | |
1563 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, | |
1564 | generation, 64); | |
1565 | ||
1566 | static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) | |
1567 | { | |
1568 | return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); | |
1569 | } | |
1570 | ||
1571 | static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) | |
1572 | { | |
1573 | return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); | |
1574 | } | |
1575 | ||
1576 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); | |
1577 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); | |
1578 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); | |
1579 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); | |
1580 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); | |
1581 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); | |
1582 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); | |
1583 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); | |
1584 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); | |
1585 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); | |
1586 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); | |
1587 | ||
1588 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) | |
1589 | { | |
1590 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); | |
1591 | } | |
1592 | ||
1593 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); | |
1594 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); | |
1595 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, | |
1596 | stripe_len, 64); | |
1597 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, | |
1598 | io_align, 32); | |
1599 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, | |
1600 | io_width, 32); | |
1601 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, | |
1602 | sector_size, 32); | |
1603 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); | |
1604 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, | |
1605 | num_stripes, 16); | |
1606 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, | |
1607 | sub_stripes, 16); | |
1608 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); | |
1609 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); | |
1610 | ||
1611 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, | |
1612 | int nr) | |
1613 | { | |
1614 | unsigned long offset = (unsigned long)c; | |
1615 | offset += offsetof(struct btrfs_chunk, stripe); | |
1616 | offset += nr * sizeof(struct btrfs_stripe); | |
1617 | return (struct btrfs_stripe *)offset; | |
1618 | } | |
1619 | ||
1620 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) | |
1621 | { | |
1622 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); | |
1623 | } | |
1624 | ||
1625 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, | |
1626 | struct btrfs_chunk *c, int nr) | |
1627 | { | |
1628 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); | |
1629 | } | |
1630 | ||
1631 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, | |
1632 | struct btrfs_chunk *c, int nr) | |
1633 | { | |
1634 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); | |
1635 | } | |
1636 | ||
1637 | /* struct btrfs_block_group_item */ | |
1638 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, | |
1639 | used, 64); | |
1640 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, | |
1641 | used, 64); | |
1642 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, | |
1643 | struct btrfs_block_group_item, chunk_objectid, 64); | |
1644 | ||
1645 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, | |
1646 | struct btrfs_block_group_item, chunk_objectid, 64); | |
1647 | BTRFS_SETGET_FUNCS(disk_block_group_flags, | |
1648 | struct btrfs_block_group_item, flags, 64); | |
1649 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, | |
1650 | struct btrfs_block_group_item, flags, 64); | |
1651 | ||
1652 | /* struct btrfs_free_space_info */ | |
1653 | BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, | |
1654 | extent_count, 32); | |
1655 | BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); | |
1656 | ||
1657 | /* struct btrfs_inode_ref */ | |
1658 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); | |
1659 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); | |
1660 | ||
1661 | /* struct btrfs_inode_extref */ | |
1662 | BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, | |
1663 | parent_objectid, 64); | |
1664 | BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, | |
1665 | name_len, 16); | |
1666 | BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); | |
1667 | ||
1668 | /* struct btrfs_inode_item */ | |
1669 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); | |
1670 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); | |
1671 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); | |
1672 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); | |
1673 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); | |
1674 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); | |
1675 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); | |
1676 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); | |
1677 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); | |
1678 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); | |
1679 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); | |
1680 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); | |
1681 | BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, | |
1682 | generation, 64); | |
1683 | BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, | |
1684 | sequence, 64); | |
1685 | BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, | |
1686 | transid, 64); | |
1687 | BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); | |
1688 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, | |
1689 | nbytes, 64); | |
1690 | BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, | |
1691 | block_group, 64); | |
1692 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); | |
1693 | BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); | |
1694 | BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); | |
1695 | BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); | |
1696 | BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); | |
1697 | BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); | |
1698 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); | |
1699 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); | |
1700 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); | |
1701 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); | |
1702 | ||
1703 | /* struct btrfs_dev_extent */ | |
1704 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, | |
1705 | chunk_tree, 64); | |
1706 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, | |
1707 | chunk_objectid, 64); | |
1708 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, | |
1709 | chunk_offset, 64); | |
1710 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); | |
1711 | ||
1712 | static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) | |
1713 | { | |
1714 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); | |
1715 | return (unsigned long)dev + ptr; | |
1716 | } | |
1717 | ||
1718 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); | |
1719 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, | |
1720 | generation, 64); | |
1721 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); | |
1722 | ||
1723 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); | |
1724 | ||
1725 | ||
1726 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); | |
1727 | ||
1728 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, | |
1729 | struct btrfs_tree_block_info *item, | |
1730 | struct btrfs_disk_key *key) | |
1731 | { | |
1732 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1733 | } | |
1734 | ||
1735 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, | |
1736 | struct btrfs_tree_block_info *item, | |
1737 | struct btrfs_disk_key *key) | |
1738 | { | |
1739 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); | |
1740 | } | |
1741 | ||
1742 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, | |
1743 | root, 64); | |
1744 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, | |
1745 | objectid, 64); | |
1746 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, | |
1747 | offset, 64); | |
1748 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, | |
1749 | count, 32); | |
1750 | ||
1751 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, | |
1752 | count, 32); | |
1753 | ||
1754 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, | |
1755 | type, 8); | |
1756 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, | |
1757 | offset, 64); | |
1758 | ||
1759 | static inline u32 btrfs_extent_inline_ref_size(int type) | |
1760 | { | |
1761 | if (type == BTRFS_TREE_BLOCK_REF_KEY || | |
1762 | type == BTRFS_SHARED_BLOCK_REF_KEY) | |
1763 | return sizeof(struct btrfs_extent_inline_ref); | |
1764 | if (type == BTRFS_SHARED_DATA_REF_KEY) | |
1765 | return sizeof(struct btrfs_shared_data_ref) + | |
1766 | sizeof(struct btrfs_extent_inline_ref); | |
1767 | if (type == BTRFS_EXTENT_DATA_REF_KEY) | |
1768 | return sizeof(struct btrfs_extent_data_ref) + | |
1769 | offsetof(struct btrfs_extent_inline_ref, offset); | |
1770 | BUG(); | |
1771 | return 0; | |
1772 | } | |
1773 | ||
1774 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); | |
1775 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, | |
1776 | generation, 64); | |
1777 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); | |
1778 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); | |
1779 | ||
1780 | /* struct btrfs_node */ | |
1781 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); | |
1782 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); | |
1783 | BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, | |
1784 | blockptr, 64); | |
1785 | BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, | |
1786 | generation, 64); | |
1787 | ||
1788 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) | |
1789 | { | |
1790 | unsigned long ptr; | |
1791 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1792 | sizeof(struct btrfs_key_ptr) * nr; | |
1793 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); | |
1794 | } | |
1795 | ||
1796 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, | |
1797 | int nr, u64 val) | |
1798 | { | |
1799 | unsigned long ptr; | |
1800 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1801 | sizeof(struct btrfs_key_ptr) * nr; | |
1802 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); | |
1803 | } | |
1804 | ||
1805 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) | |
1806 | { | |
1807 | unsigned long ptr; | |
1808 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1809 | sizeof(struct btrfs_key_ptr) * nr; | |
1810 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); | |
1811 | } | |
1812 | ||
1813 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, | |
1814 | int nr, u64 val) | |
1815 | { | |
1816 | unsigned long ptr; | |
1817 | ptr = offsetof(struct btrfs_node, ptrs) + | |
1818 | sizeof(struct btrfs_key_ptr) * nr; | |
1819 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); | |
1820 | } | |
1821 | ||
1822 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) | |
1823 | { | |
1824 | return offsetof(struct btrfs_node, ptrs) + | |
1825 | sizeof(struct btrfs_key_ptr) * nr; | |
1826 | } | |
1827 | ||
1828 | void btrfs_node_key(struct extent_buffer *eb, | |
1829 | struct btrfs_disk_key *disk_key, int nr); | |
1830 | ||
1831 | static inline void btrfs_set_node_key(struct extent_buffer *eb, | |
1832 | struct btrfs_disk_key *disk_key, int nr) | |
1833 | { | |
1834 | unsigned long ptr; | |
1835 | ptr = btrfs_node_key_ptr_offset(nr); | |
1836 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, | |
1837 | struct btrfs_key_ptr, key, disk_key); | |
1838 | } | |
1839 | ||
1840 | /* struct btrfs_item */ | |
1841 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); | |
1842 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); | |
1843 | BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); | |
1844 | BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); | |
1845 | ||
1846 | static inline unsigned long btrfs_item_nr_offset(int nr) | |
1847 | { | |
1848 | return offsetof(struct btrfs_leaf, items) + | |
1849 | sizeof(struct btrfs_item) * nr; | |
1850 | } | |
1851 | ||
1852 | static inline struct btrfs_item *btrfs_item_nr(int nr) | |
1853 | { | |
1854 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); | |
1855 | } | |
1856 | ||
1857 | static inline u32 btrfs_item_end(struct extent_buffer *eb, | |
1858 | struct btrfs_item *item) | |
1859 | { | |
1860 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); | |
1861 | } | |
1862 | ||
1863 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) | |
1864 | { | |
1865 | return btrfs_item_end(eb, btrfs_item_nr(nr)); | |
1866 | } | |
1867 | ||
1868 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) | |
1869 | { | |
1870 | return btrfs_item_offset(eb, btrfs_item_nr(nr)); | |
1871 | } | |
1872 | ||
1873 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) | |
1874 | { | |
1875 | return btrfs_item_size(eb, btrfs_item_nr(nr)); | |
1876 | } | |
1877 | ||
1878 | static inline void btrfs_item_key(struct extent_buffer *eb, | |
1879 | struct btrfs_disk_key *disk_key, int nr) | |
1880 | { | |
1881 | struct btrfs_item *item = btrfs_item_nr(nr); | |
1882 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1883 | } | |
1884 | ||
1885 | static inline void btrfs_set_item_key(struct extent_buffer *eb, | |
1886 | struct btrfs_disk_key *disk_key, int nr) | |
1887 | { | |
1888 | struct btrfs_item *item = btrfs_item_nr(nr); | |
1889 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); | |
1890 | } | |
1891 | ||
1892 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); | |
1893 | ||
1894 | /* | |
1895 | * struct btrfs_root_ref | |
1896 | */ | |
1897 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); | |
1898 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); | |
1899 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); | |
1900 | ||
1901 | /* struct btrfs_dir_item */ | |
1902 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); | |
1903 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); | |
1904 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); | |
1905 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); | |
1906 | BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); | |
1907 | BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, | |
1908 | data_len, 16); | |
1909 | BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, | |
1910 | name_len, 16); | |
1911 | BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, | |
1912 | transid, 64); | |
1913 | ||
1914 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, | |
1915 | struct btrfs_dir_item *item, | |
1916 | struct btrfs_disk_key *key) | |
1917 | { | |
1918 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); | |
1919 | } | |
1920 | ||
1921 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, | |
1922 | struct btrfs_dir_item *item, | |
1923 | struct btrfs_disk_key *key) | |
1924 | { | |
1925 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); | |
1926 | } | |
1927 | ||
1928 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, | |
1929 | num_entries, 64); | |
1930 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, | |
1931 | num_bitmaps, 64); | |
1932 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, | |
1933 | generation, 64); | |
1934 | ||
1935 | static inline void btrfs_free_space_key(struct extent_buffer *eb, | |
1936 | struct btrfs_free_space_header *h, | |
1937 | struct btrfs_disk_key *key) | |
1938 | { | |
1939 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
1940 | } | |
1941 | ||
1942 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, | |
1943 | struct btrfs_free_space_header *h, | |
1944 | struct btrfs_disk_key *key) | |
1945 | { | |
1946 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); | |
1947 | } | |
1948 | ||
1949 | /* struct btrfs_disk_key */ | |
1950 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, | |
1951 | objectid, 64); | |
1952 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); | |
1953 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); | |
1954 | ||
1955 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, | |
1956 | struct btrfs_disk_key *disk) | |
1957 | { | |
1958 | cpu->offset = le64_to_cpu(disk->offset); | |
1959 | cpu->type = disk->type; | |
1960 | cpu->objectid = le64_to_cpu(disk->objectid); | |
1961 | } | |
1962 | ||
1963 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, | |
1964 | struct btrfs_key *cpu) | |
1965 | { | |
1966 | disk->offset = cpu_to_le64(cpu->offset); | |
1967 | disk->type = cpu->type; | |
1968 | disk->objectid = cpu_to_le64(cpu->objectid); | |
1969 | } | |
1970 | ||
1971 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, | |
1972 | struct btrfs_key *key, int nr) | |
1973 | { | |
1974 | struct btrfs_disk_key disk_key; | |
1975 | btrfs_node_key(eb, &disk_key, nr); | |
1976 | btrfs_disk_key_to_cpu(key, &disk_key); | |
1977 | } | |
1978 | ||
1979 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, | |
1980 | struct btrfs_key *key, int nr) | |
1981 | { | |
1982 | struct btrfs_disk_key disk_key; | |
1983 | btrfs_item_key(eb, &disk_key, nr); | |
1984 | btrfs_disk_key_to_cpu(key, &disk_key); | |
1985 | } | |
1986 | ||
1987 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, | |
1988 | struct btrfs_dir_item *item, | |
1989 | struct btrfs_key *key) | |
1990 | { | |
1991 | struct btrfs_disk_key disk_key; | |
1992 | btrfs_dir_item_key(eb, item, &disk_key); | |
1993 | btrfs_disk_key_to_cpu(key, &disk_key); | |
1994 | } | |
1995 | ||
1996 | ||
1997 | static inline u8 btrfs_key_type(struct btrfs_key *key) | |
1998 | { | |
1999 | return key->type; | |
2000 | } | |
2001 | ||
2002 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) | |
2003 | { | |
2004 | key->type = val; | |
2005 | } | |
2006 | ||
2007 | /* struct btrfs_header */ | |
2008 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); | |
2009 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, | |
2010 | generation, 64); | |
2011 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); | |
2012 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); | |
2013 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); | |
2014 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); | |
2015 | BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, | |
2016 | generation, 64); | |
2017 | BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); | |
2018 | BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, | |
2019 | nritems, 32); | |
2020 | BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); | |
2021 | ||
2022 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) | |
2023 | { | |
2024 | return (btrfs_header_flags(eb) & flag) == flag; | |
2025 | } | |
2026 | ||
2027 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) | |
2028 | { | |
2029 | u64 flags = btrfs_header_flags(eb); | |
2030 | btrfs_set_header_flags(eb, flags | flag); | |
2031 | return (flags & flag) == flag; | |
2032 | } | |
2033 | ||
2034 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) | |
2035 | { | |
2036 | u64 flags = btrfs_header_flags(eb); | |
2037 | btrfs_set_header_flags(eb, flags & ~flag); | |
2038 | return (flags & flag) == flag; | |
2039 | } | |
2040 | ||
2041 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) | |
2042 | { | |
2043 | u64 flags = btrfs_header_flags(eb); | |
2044 | return flags >> BTRFS_BACKREF_REV_SHIFT; | |
2045 | } | |
2046 | ||
2047 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, | |
2048 | int rev) | |
2049 | { | |
2050 | u64 flags = btrfs_header_flags(eb); | |
2051 | flags &= ~BTRFS_BACKREF_REV_MASK; | |
2052 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; | |
2053 | btrfs_set_header_flags(eb, flags); | |
2054 | } | |
2055 | ||
2056 | static inline unsigned long btrfs_header_fsid(void) | |
2057 | { | |
2058 | return offsetof(struct btrfs_header, fsid); | |
2059 | } | |
2060 | ||
2061 | static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) | |
2062 | { | |
2063 | return offsetof(struct btrfs_header, chunk_tree_uuid); | |
2064 | } | |
2065 | ||
2066 | static inline int btrfs_is_leaf(struct extent_buffer *eb) | |
2067 | { | |
2068 | return btrfs_header_level(eb) == 0; | |
2069 | } | |
2070 | ||
2071 | /* struct btrfs_root_item */ | |
2072 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, | |
2073 | generation, 64); | |
2074 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); | |
2075 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); | |
2076 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); | |
2077 | ||
2078 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, | |
2079 | generation, 64); | |
2080 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); | |
2081 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); | |
2082 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); | |
2083 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); | |
2084 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); | |
2085 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); | |
2086 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); | |
2087 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, | |
2088 | last_snapshot, 64); | |
2089 | BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, | |
2090 | generation_v2, 64); | |
2091 | BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, | |
2092 | ctransid, 64); | |
2093 | BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, | |
2094 | otransid, 64); | |
2095 | BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, | |
2096 | stransid, 64); | |
2097 | BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, | |
2098 | rtransid, 64); | |
2099 | ||
2100 | static inline bool btrfs_root_readonly(struct btrfs_root *root) | |
2101 | { | |
2102 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; | |
2103 | } | |
2104 | ||
2105 | static inline bool btrfs_root_dead(struct btrfs_root *root) | |
2106 | { | |
2107 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; | |
2108 | } | |
2109 | ||
2110 | /* struct btrfs_root_backup */ | |
2111 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, | |
2112 | tree_root, 64); | |
2113 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, | |
2114 | tree_root_gen, 64); | |
2115 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, | |
2116 | tree_root_level, 8); | |
2117 | ||
2118 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, | |
2119 | chunk_root, 64); | |
2120 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, | |
2121 | chunk_root_gen, 64); | |
2122 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, | |
2123 | chunk_root_level, 8); | |
2124 | ||
2125 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, | |
2126 | extent_root, 64); | |
2127 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, | |
2128 | extent_root_gen, 64); | |
2129 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, | |
2130 | extent_root_level, 8); | |
2131 | ||
2132 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, | |
2133 | fs_root, 64); | |
2134 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, | |
2135 | fs_root_gen, 64); | |
2136 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, | |
2137 | fs_root_level, 8); | |
2138 | ||
2139 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, | |
2140 | dev_root, 64); | |
2141 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, | |
2142 | dev_root_gen, 64); | |
2143 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, | |
2144 | dev_root_level, 8); | |
2145 | ||
2146 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, | |
2147 | csum_root, 64); | |
2148 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, | |
2149 | csum_root_gen, 64); | |
2150 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, | |
2151 | csum_root_level, 8); | |
2152 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, | |
2153 | total_bytes, 64); | |
2154 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, | |
2155 | bytes_used, 64); | |
2156 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, | |
2157 | num_devices, 64); | |
2158 | ||
2159 | /* struct btrfs_balance_item */ | |
2160 | BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); | |
2161 | ||
2162 | static inline void btrfs_balance_data(struct extent_buffer *eb, | |
2163 | struct btrfs_balance_item *bi, | |
2164 | struct btrfs_disk_balance_args *ba) | |
2165 | { | |
2166 | read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2167 | } | |
2168 | ||
2169 | static inline void btrfs_set_balance_data(struct extent_buffer *eb, | |
2170 | struct btrfs_balance_item *bi, | |
2171 | struct btrfs_disk_balance_args *ba) | |
2172 | { | |
2173 | write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); | |
2174 | } | |
2175 | ||
2176 | static inline void btrfs_balance_meta(struct extent_buffer *eb, | |
2177 | struct btrfs_balance_item *bi, | |
2178 | struct btrfs_disk_balance_args *ba) | |
2179 | { | |
2180 | read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2181 | } | |
2182 | ||
2183 | static inline void btrfs_set_balance_meta(struct extent_buffer *eb, | |
2184 | struct btrfs_balance_item *bi, | |
2185 | struct btrfs_disk_balance_args *ba) | |
2186 | { | |
2187 | write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); | |
2188 | } | |
2189 | ||
2190 | static inline void btrfs_balance_sys(struct extent_buffer *eb, | |
2191 | struct btrfs_balance_item *bi, | |
2192 | struct btrfs_disk_balance_args *ba) | |
2193 | { | |
2194 | read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2195 | } | |
2196 | ||
2197 | static inline void btrfs_set_balance_sys(struct extent_buffer *eb, | |
2198 | struct btrfs_balance_item *bi, | |
2199 | struct btrfs_disk_balance_args *ba) | |
2200 | { | |
2201 | write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); | |
2202 | } | |
2203 | ||
2204 | static inline void | |
2205 | btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, | |
2206 | struct btrfs_disk_balance_args *disk) | |
2207 | { | |
2208 | memset(cpu, 0, sizeof(*cpu)); | |
2209 | ||
2210 | cpu->profiles = le64_to_cpu(disk->profiles); | |
2211 | cpu->usage = le64_to_cpu(disk->usage); | |
2212 | cpu->devid = le64_to_cpu(disk->devid); | |
2213 | cpu->pstart = le64_to_cpu(disk->pstart); | |
2214 | cpu->pend = le64_to_cpu(disk->pend); | |
2215 | cpu->vstart = le64_to_cpu(disk->vstart); | |
2216 | cpu->vend = le64_to_cpu(disk->vend); | |
2217 | cpu->target = le64_to_cpu(disk->target); | |
2218 | cpu->flags = le64_to_cpu(disk->flags); | |
2219 | cpu->limit = le64_to_cpu(disk->limit); | |
2220 | cpu->stripes_min = le32_to_cpu(disk->stripes_min); | |
2221 | cpu->stripes_max = le32_to_cpu(disk->stripes_max); | |
2222 | } | |
2223 | ||
2224 | static inline void | |
2225 | btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, | |
2226 | struct btrfs_balance_args *cpu) | |
2227 | { | |
2228 | memset(disk, 0, sizeof(*disk)); | |
2229 | ||
2230 | disk->profiles = cpu_to_le64(cpu->profiles); | |
2231 | disk->usage = cpu_to_le64(cpu->usage); | |
2232 | disk->devid = cpu_to_le64(cpu->devid); | |
2233 | disk->pstart = cpu_to_le64(cpu->pstart); | |
2234 | disk->pend = cpu_to_le64(cpu->pend); | |
2235 | disk->vstart = cpu_to_le64(cpu->vstart); | |
2236 | disk->vend = cpu_to_le64(cpu->vend); | |
2237 | disk->target = cpu_to_le64(cpu->target); | |
2238 | disk->flags = cpu_to_le64(cpu->flags); | |
2239 | disk->limit = cpu_to_le64(cpu->limit); | |
2240 | disk->stripes_min = cpu_to_le32(cpu->stripes_min); | |
2241 | disk->stripes_max = cpu_to_le32(cpu->stripes_max); | |
2242 | } | |
2243 | ||
2244 | /* struct btrfs_super_block */ | |
2245 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); | |
2246 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); | |
2247 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, | |
2248 | generation, 64); | |
2249 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); | |
2250 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, | |
2251 | struct btrfs_super_block, sys_chunk_array_size, 32); | |
2252 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, | |
2253 | struct btrfs_super_block, chunk_root_generation, 64); | |
2254 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, | |
2255 | root_level, 8); | |
2256 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, | |
2257 | chunk_root, 64); | |
2258 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, | |
2259 | chunk_root_level, 8); | |
2260 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, | |
2261 | log_root, 64); | |
2262 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, | |
2263 | log_root_transid, 64); | |
2264 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, | |
2265 | log_root_level, 8); | |
2266 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, | |
2267 | total_bytes, 64); | |
2268 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, | |
2269 | bytes_used, 64); | |
2270 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, | |
2271 | sectorsize, 32); | |
2272 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, | |
2273 | nodesize, 32); | |
2274 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, | |
2275 | stripesize, 32); | |
2276 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, | |
2277 | root_dir_objectid, 64); | |
2278 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, | |
2279 | num_devices, 64); | |
2280 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, | |
2281 | compat_flags, 64); | |
2282 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, | |
2283 | compat_ro_flags, 64); | |
2284 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, | |
2285 | incompat_flags, 64); | |
2286 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, | |
2287 | csum_type, 16); | |
2288 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, | |
2289 | cache_generation, 64); | |
2290 | BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); | |
2291 | BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, | |
2292 | uuid_tree_generation, 64); | |
2293 | ||
2294 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) | |
2295 | { | |
2296 | u16 t = btrfs_super_csum_type(s); | |
2297 | /* | |
2298 | * csum type is validated at mount time | |
2299 | */ | |
2300 | return btrfs_csum_sizes[t]; | |
2301 | } | |
2302 | ||
2303 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) | |
2304 | { | |
2305 | return offsetof(struct btrfs_leaf, items); | |
2306 | } | |
2307 | ||
2308 | /* | |
2309 | * The leaf data grows from end-to-front in the node. | |
2310 | * this returns the address of the start of the last item, | |
2311 | * which is the stop of the leaf data stack | |
2312 | */ | |
2313 | static inline unsigned int leaf_data_end(struct btrfs_fs_info *fs_info, | |
2314 | struct extent_buffer *leaf) | |
2315 | { | |
2316 | u32 nr = btrfs_header_nritems(leaf); | |
2317 | ||
2318 | if (nr == 0) | |
2319 | return BTRFS_LEAF_DATA_SIZE(fs_info); | |
2320 | return btrfs_item_offset_nr(leaf, nr - 1); | |
2321 | } | |
2322 | ||
2323 | /* struct btrfs_file_extent_item */ | |
2324 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); | |
2325 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, | |
2326 | struct btrfs_file_extent_item, disk_bytenr, 64); | |
2327 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, | |
2328 | struct btrfs_file_extent_item, offset, 64); | |
2329 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, | |
2330 | struct btrfs_file_extent_item, generation, 64); | |
2331 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, | |
2332 | struct btrfs_file_extent_item, num_bytes, 64); | |
2333 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, | |
2334 | struct btrfs_file_extent_item, disk_num_bytes, 64); | |
2335 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, | |
2336 | struct btrfs_file_extent_item, compression, 8); | |
2337 | ||
2338 | static inline unsigned long | |
2339 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) | |
2340 | { | |
2341 | return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; | |
2342 | } | |
2343 | ||
2344 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) | |
2345 | { | |
2346 | return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; | |
2347 | } | |
2348 | ||
2349 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, | |
2350 | disk_bytenr, 64); | |
2351 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, | |
2352 | generation, 64); | |
2353 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, | |
2354 | disk_num_bytes, 64); | |
2355 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, | |
2356 | offset, 64); | |
2357 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, | |
2358 | num_bytes, 64); | |
2359 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, | |
2360 | ram_bytes, 64); | |
2361 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, | |
2362 | compression, 8); | |
2363 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, | |
2364 | encryption, 8); | |
2365 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, | |
2366 | other_encoding, 16); | |
2367 | ||
2368 | /* | |
2369 | * this returns the number of bytes used by the item on disk, minus the | |
2370 | * size of any extent headers. If a file is compressed on disk, this is | |
2371 | * the compressed size | |
2372 | */ | |
2373 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, | |
2374 | struct btrfs_item *e) | |
2375 | { | |
2376 | return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; | |
2377 | } | |
2378 | ||
2379 | /* this returns the number of file bytes represented by the inline item. | |
2380 | * If an item is compressed, this is the uncompressed size | |
2381 | */ | |
2382 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, | |
2383 | int slot, | |
2384 | struct btrfs_file_extent_item *fi) | |
2385 | { | |
2386 | struct btrfs_map_token token; | |
2387 | ||
2388 | btrfs_init_map_token(&token); | |
2389 | /* | |
2390 | * return the space used on disk if this item isn't | |
2391 | * compressed or encoded | |
2392 | */ | |
2393 | if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && | |
2394 | btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && | |
2395 | btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { | |
2396 | return btrfs_file_extent_inline_item_len(eb, | |
2397 | btrfs_item_nr(slot)); | |
2398 | } | |
2399 | ||
2400 | /* otherwise use the ram bytes field */ | |
2401 | return btrfs_token_file_extent_ram_bytes(eb, fi, &token); | |
2402 | } | |
2403 | ||
2404 | ||
2405 | /* btrfs_dev_stats_item */ | |
2406 | static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, | |
2407 | struct btrfs_dev_stats_item *ptr, | |
2408 | int index) | |
2409 | { | |
2410 | u64 val; | |
2411 | ||
2412 | read_extent_buffer(eb, &val, | |
2413 | offsetof(struct btrfs_dev_stats_item, values) + | |
2414 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
2415 | sizeof(val)); | |
2416 | return val; | |
2417 | } | |
2418 | ||
2419 | static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, | |
2420 | struct btrfs_dev_stats_item *ptr, | |
2421 | int index, u64 val) | |
2422 | { | |
2423 | write_extent_buffer(eb, &val, | |
2424 | offsetof(struct btrfs_dev_stats_item, values) + | |
2425 | ((unsigned long)ptr) + (index * sizeof(u64)), | |
2426 | sizeof(val)); | |
2427 | } | |
2428 | ||
2429 | /* btrfs_qgroup_status_item */ | |
2430 | BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, | |
2431 | generation, 64); | |
2432 | BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, | |
2433 | version, 64); | |
2434 | BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, | |
2435 | flags, 64); | |
2436 | BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, | |
2437 | rescan, 64); | |
2438 | ||
2439 | /* btrfs_qgroup_info_item */ | |
2440 | BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, | |
2441 | generation, 64); | |
2442 | BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); | |
2443 | BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, | |
2444 | rfer_cmpr, 64); | |
2445 | BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); | |
2446 | BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, | |
2447 | excl_cmpr, 64); | |
2448 | ||
2449 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, | |
2450 | struct btrfs_qgroup_info_item, generation, 64); | |
2451 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, | |
2452 | rfer, 64); | |
2453 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, | |
2454 | struct btrfs_qgroup_info_item, rfer_cmpr, 64); | |
2455 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, | |
2456 | excl, 64); | |
2457 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, | |
2458 | struct btrfs_qgroup_info_item, excl_cmpr, 64); | |
2459 | ||
2460 | /* btrfs_qgroup_limit_item */ | |
2461 | BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, | |
2462 | flags, 64); | |
2463 | BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, | |
2464 | max_rfer, 64); | |
2465 | BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, | |
2466 | max_excl, 64); | |
2467 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, | |
2468 | rsv_rfer, 64); | |
2469 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, | |
2470 | rsv_excl, 64); | |
2471 | ||
2472 | /* btrfs_dev_replace_item */ | |
2473 | BTRFS_SETGET_FUNCS(dev_replace_src_devid, | |
2474 | struct btrfs_dev_replace_item, src_devid, 64); | |
2475 | BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, | |
2476 | struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, | |
2477 | 64); | |
2478 | BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, | |
2479 | replace_state, 64); | |
2480 | BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, | |
2481 | time_started, 64); | |
2482 | BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, | |
2483 | time_stopped, 64); | |
2484 | BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, | |
2485 | num_write_errors, 64); | |
2486 | BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, | |
2487 | struct btrfs_dev_replace_item, num_uncorrectable_read_errors, | |
2488 | 64); | |
2489 | BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, | |
2490 | cursor_left, 64); | |
2491 | BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, | |
2492 | cursor_right, 64); | |
2493 | ||
2494 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, | |
2495 | struct btrfs_dev_replace_item, src_devid, 64); | |
2496 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, | |
2497 | struct btrfs_dev_replace_item, | |
2498 | cont_reading_from_srcdev_mode, 64); | |
2499 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, | |
2500 | struct btrfs_dev_replace_item, replace_state, 64); | |
2501 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, | |
2502 | struct btrfs_dev_replace_item, time_started, 64); | |
2503 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, | |
2504 | struct btrfs_dev_replace_item, time_stopped, 64); | |
2505 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, | |
2506 | struct btrfs_dev_replace_item, num_write_errors, 64); | |
2507 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, | |
2508 | struct btrfs_dev_replace_item, | |
2509 | num_uncorrectable_read_errors, 64); | |
2510 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, | |
2511 | struct btrfs_dev_replace_item, cursor_left, 64); | |
2512 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, | |
2513 | struct btrfs_dev_replace_item, cursor_right, 64); | |
2514 | ||
2515 | /* helper function to cast into the data area of the leaf. */ | |
2516 | #define btrfs_item_ptr(leaf, slot, type) \ | |
2517 | ((type *)(btrfs_leaf_data(leaf) + \ | |
2518 | btrfs_item_offset_nr(leaf, slot))) | |
2519 | ||
2520 | #define btrfs_item_ptr_offset(leaf, slot) \ | |
2521 | ((unsigned long)(btrfs_leaf_data(leaf) + \ | |
2522 | btrfs_item_offset_nr(leaf, slot))) | |
2523 | ||
2524 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) | |
2525 | { | |
2526 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && | |
2527 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); | |
2528 | } | |
2529 | ||
2530 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) | |
2531 | { | |
2532 | return mapping_gfp_constraint(mapping, ~__GFP_FS); | |
2533 | } | |
2534 | ||
2535 | /* extent-tree.c */ | |
2536 | ||
2537 | u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); | |
2538 | ||
2539 | static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, | |
2540 | unsigned num_items) | |
2541 | { | |
2542 | return fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; | |
2543 | } | |
2544 | ||
2545 | /* | |
2546 | * Doing a truncate won't result in new nodes or leaves, just what we need for | |
2547 | * COW. | |
2548 | */ | |
2549 | static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, | |
2550 | unsigned num_items) | |
2551 | { | |
2552 | return fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; | |
2553 | } | |
2554 | ||
2555 | int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, | |
2556 | struct btrfs_fs_info *fs_info); | |
2557 | int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, | |
2558 | struct btrfs_fs_info *fs_info); | |
2559 | void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, | |
2560 | const u64 start); | |
2561 | void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); | |
2562 | bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); | |
2563 | void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); | |
2564 | void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); | |
2565 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); | |
2566 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, | |
2567 | struct btrfs_fs_info *fs_info, unsigned long count); | |
2568 | int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, | |
2569 | unsigned long count, u64 transid, int wait); | |
2570 | int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); | |
2571 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, | |
2572 | struct btrfs_fs_info *fs_info, u64 bytenr, | |
2573 | u64 offset, int metadata, u64 *refs, u64 *flags); | |
2574 | int btrfs_pin_extent(struct btrfs_fs_info *fs_info, | |
2575 | u64 bytenr, u64 num, int reserved); | |
2576 | int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, | |
2577 | u64 bytenr, u64 num_bytes); | |
2578 | int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, | |
2579 | struct extent_buffer *eb); | |
2580 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, | |
2581 | struct btrfs_root *root, | |
2582 | u64 objectid, u64 offset, u64 bytenr); | |
2583 | struct btrfs_block_group_cache *btrfs_lookup_block_group( | |
2584 | struct btrfs_fs_info *info, | |
2585 | u64 bytenr); | |
2586 | void btrfs_get_block_group(struct btrfs_block_group_cache *cache); | |
2587 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); | |
2588 | int get_block_group_index(struct btrfs_block_group_cache *cache); | |
2589 | struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, | |
2590 | struct btrfs_root *root, u64 parent, | |
2591 | u64 root_objectid, | |
2592 | struct btrfs_disk_key *key, int level, | |
2593 | u64 hint, u64 empty_size); | |
2594 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, | |
2595 | struct btrfs_root *root, | |
2596 | struct extent_buffer *buf, | |
2597 | u64 parent, int last_ref); | |
2598 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, | |
2599 | u64 root_objectid, u64 owner, | |
2600 | u64 offset, u64 ram_bytes, | |
2601 | struct btrfs_key *ins); | |
2602 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, | |
2603 | struct btrfs_fs_info *fs_info, | |
2604 | u64 root_objectid, u64 owner, u64 offset, | |
2605 | struct btrfs_key *ins); | |
2606 | int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, | |
2607 | u64 min_alloc_size, u64 empty_size, u64 hint_byte, | |
2608 | struct btrfs_key *ins, int is_data, int delalloc); | |
2609 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, | |
2610 | struct extent_buffer *buf, int full_backref); | |
2611 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, | |
2612 | struct extent_buffer *buf, int full_backref); | |
2613 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, | |
2614 | struct btrfs_fs_info *fs_info, | |
2615 | u64 bytenr, u64 num_bytes, u64 flags, | |
2616 | int level, int is_data); | |
2617 | int btrfs_free_extent(struct btrfs_trans_handle *trans, | |
2618 | struct btrfs_fs_info *fs_info, | |
2619 | u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, | |
2620 | u64 owner, u64 offset); | |
2621 | ||
2622 | int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, | |
2623 | u64 start, u64 len, int delalloc); | |
2624 | int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, | |
2625 | u64 start, u64 len); | |
2626 | void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, | |
2627 | struct btrfs_fs_info *fs_info); | |
2628 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, | |
2629 | struct btrfs_fs_info *fs_info); | |
2630 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, | |
2631 | struct btrfs_fs_info *fs_info, | |
2632 | u64 bytenr, u64 num_bytes, u64 parent, | |
2633 | u64 root_objectid, u64 owner, u64 offset); | |
2634 | ||
2635 | int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans, | |
2636 | struct btrfs_fs_info *fs_info); | |
2637 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, | |
2638 | struct btrfs_fs_info *fs_info); | |
2639 | int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, | |
2640 | struct btrfs_fs_info *fs_info); | |
2641 | int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); | |
2642 | int btrfs_free_block_groups(struct btrfs_fs_info *info); | |
2643 | int btrfs_read_block_groups(struct btrfs_fs_info *info); | |
2644 | int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); | |
2645 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, | |
2646 | struct btrfs_fs_info *fs_info, u64 bytes_used, | |
2647 | u64 type, u64 chunk_objectid, u64 chunk_offset, | |
2648 | u64 size); | |
2649 | struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( | |
2650 | struct btrfs_fs_info *fs_info, | |
2651 | const u64 chunk_offset); | |
2652 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, | |
2653 | struct btrfs_fs_info *fs_info, u64 group_start, | |
2654 | struct extent_map *em); | |
2655 | void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); | |
2656 | void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); | |
2657 | void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); | |
2658 | void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, | |
2659 | struct btrfs_fs_info *fs_info); | |
2660 | u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); | |
2661 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); | |
2662 | ||
2663 | enum btrfs_reserve_flush_enum { | |
2664 | /* If we are in the transaction, we can't flush anything.*/ | |
2665 | BTRFS_RESERVE_NO_FLUSH, | |
2666 | /* | |
2667 | * Flushing delalloc may cause deadlock somewhere, in this | |
2668 | * case, use FLUSH LIMIT | |
2669 | */ | |
2670 | BTRFS_RESERVE_FLUSH_LIMIT, | |
2671 | BTRFS_RESERVE_FLUSH_ALL, | |
2672 | }; | |
2673 | ||
2674 | enum btrfs_flush_state { | |
2675 | FLUSH_DELAYED_ITEMS_NR = 1, | |
2676 | FLUSH_DELAYED_ITEMS = 2, | |
2677 | FLUSH_DELALLOC = 3, | |
2678 | FLUSH_DELALLOC_WAIT = 4, | |
2679 | ALLOC_CHUNK = 5, | |
2680 | COMMIT_TRANS = 6, | |
2681 | }; | |
2682 | ||
2683 | int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len); | |
2684 | int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes); | |
2685 | void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len); | |
2686 | void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, | |
2687 | u64 len); | |
2688 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, | |
2689 | struct btrfs_fs_info *fs_info); | |
2690 | void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); | |
2691 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, | |
2692 | struct inode *inode); | |
2693 | void btrfs_orphan_release_metadata(struct inode *inode); | |
2694 | int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, | |
2695 | struct btrfs_block_rsv *rsv, | |
2696 | int nitems, | |
2697 | u64 *qgroup_reserved, bool use_global_rsv); | |
2698 | void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, | |
2699 | struct btrfs_block_rsv *rsv, | |
2700 | u64 qgroup_reserved); | |
2701 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); | |
2702 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); | |
2703 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len); | |
2704 | void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len); | |
2705 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); | |
2706 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, | |
2707 | unsigned short type); | |
2708 | void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, | |
2709 | struct btrfs_block_rsv *rsv); | |
2710 | void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); | |
2711 | int btrfs_block_rsv_add(struct btrfs_root *root, | |
2712 | struct btrfs_block_rsv *block_rsv, u64 num_bytes, | |
2713 | enum btrfs_reserve_flush_enum flush); | |
2714 | int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); | |
2715 | int btrfs_block_rsv_refill(struct btrfs_root *root, | |
2716 | struct btrfs_block_rsv *block_rsv, u64 min_reserved, | |
2717 | enum btrfs_reserve_flush_enum flush); | |
2718 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, | |
2719 | struct btrfs_block_rsv *dst_rsv, u64 num_bytes, | |
2720 | int update_size); | |
2721 | int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, | |
2722 | struct btrfs_block_rsv *dest, u64 num_bytes, | |
2723 | int min_factor); | |
2724 | void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, | |
2725 | struct btrfs_block_rsv *block_rsv, | |
2726 | u64 num_bytes); | |
2727 | int btrfs_inc_block_group_ro(struct btrfs_root *root, | |
2728 | struct btrfs_block_group_cache *cache); | |
2729 | void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); | |
2730 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); | |
2731 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); | |
2732 | int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, | |
2733 | u64 start, u64 end); | |
2734 | int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, | |
2735 | u64 num_bytes, u64 *actual_bytes); | |
2736 | int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, | |
2737 | struct btrfs_fs_info *fs_info, u64 type); | |
2738 | int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); | |
2739 | ||
2740 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); | |
2741 | int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, | |
2742 | struct btrfs_fs_info *fs_info); | |
2743 | int __get_raid_index(u64 flags); | |
2744 | int btrfs_start_write_no_snapshoting(struct btrfs_root *root); | |
2745 | void btrfs_end_write_no_snapshoting(struct btrfs_root *root); | |
2746 | void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); | |
2747 | void check_system_chunk(struct btrfs_trans_handle *trans, | |
2748 | struct btrfs_fs_info *fs_info, const u64 type); | |
2749 | u64 add_new_free_space(struct btrfs_block_group_cache *block_group, | |
2750 | struct btrfs_fs_info *info, u64 start, u64 end); | |
2751 | ||
2752 | /* ctree.c */ | |
2753 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, | |
2754 | int level, int *slot); | |
2755 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); | |
2756 | int btrfs_previous_item(struct btrfs_root *root, | |
2757 | struct btrfs_path *path, u64 min_objectid, | |
2758 | int type); | |
2759 | int btrfs_previous_extent_item(struct btrfs_root *root, | |
2760 | struct btrfs_path *path, u64 min_objectid); | |
2761 | void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, | |
2762 | struct btrfs_path *path, | |
2763 | struct btrfs_key *new_key); | |
2764 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); | |
2765 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); | |
2766 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, | |
2767 | struct btrfs_key *key, int lowest_level, | |
2768 | u64 min_trans); | |
2769 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, | |
2770 | struct btrfs_path *path, | |
2771 | u64 min_trans); | |
2772 | enum btrfs_compare_tree_result { | |
2773 | BTRFS_COMPARE_TREE_NEW, | |
2774 | BTRFS_COMPARE_TREE_DELETED, | |
2775 | BTRFS_COMPARE_TREE_CHANGED, | |
2776 | BTRFS_COMPARE_TREE_SAME, | |
2777 | }; | |
2778 | typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root, | |
2779 | struct btrfs_root *right_root, | |
2780 | struct btrfs_path *left_path, | |
2781 | struct btrfs_path *right_path, | |
2782 | struct btrfs_key *key, | |
2783 | enum btrfs_compare_tree_result result, | |
2784 | void *ctx); | |
2785 | int btrfs_compare_trees(struct btrfs_root *left_root, | |
2786 | struct btrfs_root *right_root, | |
2787 | btrfs_changed_cb_t cb, void *ctx); | |
2788 | int btrfs_cow_block(struct btrfs_trans_handle *trans, | |
2789 | struct btrfs_root *root, struct extent_buffer *buf, | |
2790 | struct extent_buffer *parent, int parent_slot, | |
2791 | struct extent_buffer **cow_ret); | |
2792 | int btrfs_copy_root(struct btrfs_trans_handle *trans, | |
2793 | struct btrfs_root *root, | |
2794 | struct extent_buffer *buf, | |
2795 | struct extent_buffer **cow_ret, u64 new_root_objectid); | |
2796 | int btrfs_block_can_be_shared(struct btrfs_root *root, | |
2797 | struct extent_buffer *buf); | |
2798 | void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, | |
2799 | u32 data_size); | |
2800 | void btrfs_truncate_item(struct btrfs_fs_info *fs_info, | |
2801 | struct btrfs_path *path, u32 new_size, int from_end); | |
2802 | int btrfs_split_item(struct btrfs_trans_handle *trans, | |
2803 | struct btrfs_root *root, | |
2804 | struct btrfs_path *path, | |
2805 | struct btrfs_key *new_key, | |
2806 | unsigned long split_offset); | |
2807 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, | |
2808 | struct btrfs_root *root, | |
2809 | struct btrfs_path *path, | |
2810 | struct btrfs_key *new_key); | |
2811 | int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, | |
2812 | u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); | |
2813 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root | |
2814 | *root, struct btrfs_key *key, struct btrfs_path *p, int | |
2815 | ins_len, int cow); | |
2816 | int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key, | |
2817 | struct btrfs_path *p, u64 time_seq); | |
2818 | int btrfs_search_slot_for_read(struct btrfs_root *root, | |
2819 | struct btrfs_key *key, struct btrfs_path *p, | |
2820 | int find_higher, int return_any); | |
2821 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, | |
2822 | struct btrfs_root *root, struct extent_buffer *parent, | |
2823 | int start_slot, u64 *last_ret, | |
2824 | struct btrfs_key *progress); | |
2825 | void btrfs_release_path(struct btrfs_path *p); | |
2826 | struct btrfs_path *btrfs_alloc_path(void); | |
2827 | void btrfs_free_path(struct btrfs_path *p); | |
2828 | void btrfs_set_path_blocking(struct btrfs_path *p); | |
2829 | void btrfs_clear_path_blocking(struct btrfs_path *p, | |
2830 | struct extent_buffer *held, int held_rw); | |
2831 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); | |
2832 | ||
2833 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, | |
2834 | struct btrfs_path *path, int slot, int nr); | |
2835 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, | |
2836 | struct btrfs_root *root, | |
2837 | struct btrfs_path *path) | |
2838 | { | |
2839 | return btrfs_del_items(trans, root, path, path->slots[0], 1); | |
2840 | } | |
2841 | ||
2842 | void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, | |
2843 | struct btrfs_key *cpu_key, u32 *data_size, | |
2844 | u32 total_data, u32 total_size, int nr); | |
2845 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root | |
2846 | *root, struct btrfs_key *key, void *data, u32 data_size); | |
2847 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, | |
2848 | struct btrfs_root *root, | |
2849 | struct btrfs_path *path, | |
2850 | struct btrfs_key *cpu_key, u32 *data_size, int nr); | |
2851 | ||
2852 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, | |
2853 | struct btrfs_root *root, | |
2854 | struct btrfs_path *path, | |
2855 | struct btrfs_key *key, | |
2856 | u32 data_size) | |
2857 | { | |
2858 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); | |
2859 | } | |
2860 | ||
2861 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); | |
2862 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); | |
2863 | int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, | |
2864 | u64 time_seq); | |
2865 | static inline int btrfs_next_old_item(struct btrfs_root *root, | |
2866 | struct btrfs_path *p, u64 time_seq) | |
2867 | { | |
2868 | ++p->slots[0]; | |
2869 | if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) | |
2870 | return btrfs_next_old_leaf(root, p, time_seq); | |
2871 | return 0; | |
2872 | } | |
2873 | static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) | |
2874 | { | |
2875 | return btrfs_next_old_item(root, p, 0); | |
2876 | } | |
2877 | int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, | |
2878 | struct extent_buffer *leaf); | |
2879 | int __must_check btrfs_drop_snapshot(struct btrfs_root *root, | |
2880 | struct btrfs_block_rsv *block_rsv, | |
2881 | int update_ref, int for_reloc); | |
2882 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, | |
2883 | struct btrfs_root *root, | |
2884 | struct extent_buffer *node, | |
2885 | struct extent_buffer *parent); | |
2886 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) | |
2887 | { | |
2888 | /* | |
2889 | * Do it this way so we only ever do one test_bit in the normal case. | |
2890 | */ | |
2891 | if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { | |
2892 | if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) | |
2893 | return 2; | |
2894 | return 1; | |
2895 | } | |
2896 | return 0; | |
2897 | } | |
2898 | ||
2899 | /* | |
2900 | * If we remount the fs to be R/O or umount the fs, the cleaner needn't do | |
2901 | * anything except sleeping. This function is used to check the status of | |
2902 | * the fs. | |
2903 | */ | |
2904 | static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) | |
2905 | { | |
2906 | return fs_info->sb->s_flags & MS_RDONLY || btrfs_fs_closing(fs_info); | |
2907 | } | |
2908 | ||
2909 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) | |
2910 | { | |
2911 | kfree(fs_info->balance_ctl); | |
2912 | kfree(fs_info->delayed_root); | |
2913 | kfree(fs_info->extent_root); | |
2914 | kfree(fs_info->tree_root); | |
2915 | kfree(fs_info->chunk_root); | |
2916 | kfree(fs_info->dev_root); | |
2917 | kfree(fs_info->csum_root); | |
2918 | kfree(fs_info->quota_root); | |
2919 | kfree(fs_info->uuid_root); | |
2920 | kfree(fs_info->free_space_root); | |
2921 | kfree(fs_info->super_copy); | |
2922 | kfree(fs_info->super_for_commit); | |
2923 | security_free_mnt_opts(&fs_info->security_opts); | |
2924 | kfree(fs_info); | |
2925 | } | |
2926 | ||
2927 | /* tree mod log functions from ctree.c */ | |
2928 | u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
2929 | struct seq_list *elem); | |
2930 | void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, | |
2931 | struct seq_list *elem); | |
2932 | int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); | |
2933 | ||
2934 | /* root-item.c */ | |
2935 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, | |
2936 | struct btrfs_fs_info *fs_info, | |
2937 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, | |
2938 | const char *name, int name_len); | |
2939 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, | |
2940 | struct btrfs_fs_info *fs_info, | |
2941 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, | |
2942 | const char *name, int name_len); | |
2943 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, | |
2944 | struct btrfs_key *key); | |
2945 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root | |
2946 | *root, struct btrfs_key *key, struct btrfs_root_item | |
2947 | *item); | |
2948 | int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, | |
2949 | struct btrfs_root *root, | |
2950 | struct btrfs_key *key, | |
2951 | struct btrfs_root_item *item); | |
2952 | int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key, | |
2953 | struct btrfs_path *path, struct btrfs_root_item *root_item, | |
2954 | struct btrfs_key *root_key); | |
2955 | int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); | |
2956 | void btrfs_set_root_node(struct btrfs_root_item *item, | |
2957 | struct extent_buffer *node); | |
2958 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); | |
2959 | void btrfs_update_root_times(struct btrfs_trans_handle *trans, | |
2960 | struct btrfs_root *root); | |
2961 | ||
2962 | /* uuid-tree.c */ | |
2963 | int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, | |
2964 | struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, | |
2965 | u64 subid); | |
2966 | int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, | |
2967 | struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, | |
2968 | u64 subid); | |
2969 | int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, | |
2970 | int (*check_func)(struct btrfs_fs_info *, u8 *, u8, | |
2971 | u64)); | |
2972 | ||
2973 | /* dir-item.c */ | |
2974 | int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, | |
2975 | const char *name, int name_len); | |
2976 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, | |
2977 | struct btrfs_root *root, const char *name, | |
2978 | int name_len, struct inode *dir, | |
2979 | struct btrfs_key *location, u8 type, u64 index); | |
2980 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, | |
2981 | struct btrfs_root *root, | |
2982 | struct btrfs_path *path, u64 dir, | |
2983 | const char *name, int name_len, | |
2984 | int mod); | |
2985 | struct btrfs_dir_item * | |
2986 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, | |
2987 | struct btrfs_root *root, | |
2988 | struct btrfs_path *path, u64 dir, | |
2989 | u64 objectid, const char *name, int name_len, | |
2990 | int mod); | |
2991 | struct btrfs_dir_item * | |
2992 | btrfs_search_dir_index_item(struct btrfs_root *root, | |
2993 | struct btrfs_path *path, u64 dirid, | |
2994 | const char *name, int name_len); | |
2995 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, | |
2996 | struct btrfs_root *root, | |
2997 | struct btrfs_path *path, | |
2998 | struct btrfs_dir_item *di); | |
2999 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, | |
3000 | struct btrfs_root *root, | |
3001 | struct btrfs_path *path, u64 objectid, | |
3002 | const char *name, u16 name_len, | |
3003 | const void *data, u16 data_len); | |
3004 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, | |
3005 | struct btrfs_root *root, | |
3006 | struct btrfs_path *path, u64 dir, | |
3007 | const char *name, u16 name_len, | |
3008 | int mod); | |
3009 | int verify_dir_item(struct btrfs_fs_info *fs_info, | |
3010 | struct extent_buffer *leaf, | |
3011 | struct btrfs_dir_item *dir_item); | |
3012 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, | |
3013 | struct btrfs_path *path, | |
3014 | const char *name, | |
3015 | int name_len); | |
3016 | ||
3017 | /* orphan.c */ | |
3018 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, | |
3019 | struct btrfs_root *root, u64 offset); | |
3020 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, | |
3021 | struct btrfs_root *root, u64 offset); | |
3022 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); | |
3023 | ||
3024 | /* inode-item.c */ | |
3025 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, | |
3026 | struct btrfs_root *root, | |
3027 | const char *name, int name_len, | |
3028 | u64 inode_objectid, u64 ref_objectid, u64 index); | |
3029 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, | |
3030 | struct btrfs_root *root, | |
3031 | const char *name, int name_len, | |
3032 | u64 inode_objectid, u64 ref_objectid, u64 *index); | |
3033 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, | |
3034 | struct btrfs_root *root, | |
3035 | struct btrfs_path *path, u64 objectid); | |
3036 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root | |
3037 | *root, struct btrfs_path *path, | |
3038 | struct btrfs_key *location, int mod); | |
3039 | ||
3040 | struct btrfs_inode_extref * | |
3041 | btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, | |
3042 | struct btrfs_root *root, | |
3043 | struct btrfs_path *path, | |
3044 | const char *name, int name_len, | |
3045 | u64 inode_objectid, u64 ref_objectid, int ins_len, | |
3046 | int cow); | |
3047 | ||
3048 | int btrfs_find_name_in_ext_backref(struct btrfs_path *path, | |
3049 | u64 ref_objectid, const char *name, | |
3050 | int name_len, | |
3051 | struct btrfs_inode_extref **extref_ret); | |
3052 | ||
3053 | /* file-item.c */ | |
3054 | struct btrfs_dio_private; | |
3055 | int btrfs_del_csums(struct btrfs_trans_handle *trans, | |
3056 | struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); | |
3057 | int btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); | |
3058 | int btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, | |
3059 | u64 logical_offset); | |
3060 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, | |
3061 | struct btrfs_root *root, | |
3062 | u64 objectid, u64 pos, | |
3063 | u64 disk_offset, u64 disk_num_bytes, | |
3064 | u64 num_bytes, u64 offset, u64 ram_bytes, | |
3065 | u8 compression, u8 encryption, u16 other_encoding); | |
3066 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, | |
3067 | struct btrfs_root *root, | |
3068 | struct btrfs_path *path, u64 objectid, | |
3069 | u64 bytenr, int mod); | |
3070 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, | |
3071 | struct btrfs_root *root, | |
3072 | struct btrfs_ordered_sum *sums); | |
3073 | int btrfs_csum_one_bio(struct inode *inode, struct bio *bio, | |
3074 | u64 file_start, int contig); | |
3075 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, | |
3076 | struct list_head *list, int search_commit); | |
3077 | void btrfs_extent_item_to_extent_map(struct inode *inode, | |
3078 | const struct btrfs_path *path, | |
3079 | struct btrfs_file_extent_item *fi, | |
3080 | const bool new_inline, | |
3081 | struct extent_map *em); | |
3082 | ||
3083 | /* inode.c */ | |
3084 | struct btrfs_delalloc_work { | |
3085 | struct inode *inode; | |
3086 | int delay_iput; | |
3087 | struct completion completion; | |
3088 | struct list_head list; | |
3089 | struct btrfs_work work; | |
3090 | }; | |
3091 | ||
3092 | struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, | |
3093 | int delay_iput); | |
3094 | void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); | |
3095 | ||
3096 | struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, | |
3097 | size_t pg_offset, u64 start, u64 len, | |
3098 | int create); | |
3099 | noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, | |
3100 | u64 *orig_start, u64 *orig_block_len, | |
3101 | u64 *ram_bytes); | |
3102 | ||
3103 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ | |
3104 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) | |
3105 | #define ClearPageChecked ClearPageFsMisc | |
3106 | #define SetPageChecked SetPageFsMisc | |
3107 | #define PageChecked PageFsMisc | |
3108 | #endif | |
3109 | ||
3110 | /* This forces readahead on a given range of bytes in an inode */ | |
3111 | static inline void btrfs_force_ra(struct address_space *mapping, | |
3112 | struct file_ra_state *ra, struct file *file, | |
3113 | pgoff_t offset, unsigned long req_size) | |
3114 | { | |
3115 | page_cache_sync_readahead(mapping, ra, file, offset, req_size); | |
3116 | } | |
3117 | ||
3118 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); | |
3119 | int btrfs_set_inode_index(struct inode *dir, u64 *index); | |
3120 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, | |
3121 | struct btrfs_root *root, | |
3122 | struct inode *dir, struct inode *inode, | |
3123 | const char *name, int name_len); | |
3124 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
3125 | struct inode *parent_inode, struct inode *inode, | |
3126 | const char *name, int name_len, int add_backref, u64 index); | |
3127 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, | |
3128 | struct btrfs_root *root, | |
3129 | struct inode *dir, u64 objectid, | |
3130 | const char *name, int name_len); | |
3131 | int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, | |
3132 | int front); | |
3133 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, | |
3134 | struct btrfs_root *root, | |
3135 | struct inode *inode, u64 new_size, | |
3136 | u32 min_type); | |
3137 | ||
3138 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); | |
3139 | int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, | |
3140 | int nr); | |
3141 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, | |
3142 | struct extent_state **cached_state, int dedupe); | |
3143 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, | |
3144 | struct btrfs_root *new_root, | |
3145 | struct btrfs_root *parent_root, | |
3146 | u64 new_dirid); | |
3147 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, | |
3148 | size_t size, struct bio *bio, | |
3149 | unsigned long bio_flags); | |
3150 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); | |
3151 | int btrfs_readpage(struct file *file, struct page *page); | |
3152 | void btrfs_evict_inode(struct inode *inode); | |
3153 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); | |
3154 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
3155 | void btrfs_destroy_inode(struct inode *inode); | |
3156 | int btrfs_drop_inode(struct inode *inode); | |
3157 | int btrfs_init_cachep(void); | |
3158 | void btrfs_destroy_cachep(void); | |
3159 | long btrfs_ioctl_trans_end(struct file *file); | |
3160 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, | |
3161 | struct btrfs_root *root, int *was_new); | |
3162 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, | |
3163 | size_t pg_offset, u64 start, u64 end, | |
3164 | int create); | |
3165 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
3166 | struct btrfs_root *root, | |
3167 | struct inode *inode); | |
3168 | int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, | |
3169 | struct btrfs_root *root, struct inode *inode); | |
3170 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); | |
3171 | int btrfs_orphan_cleanup(struct btrfs_root *root); | |
3172 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, | |
3173 | struct btrfs_root *root); | |
3174 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); | |
3175 | void btrfs_invalidate_inodes(struct btrfs_root *root); | |
3176 | void btrfs_add_delayed_iput(struct inode *inode); | |
3177 | void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); | |
3178 | int btrfs_prealloc_file_range(struct inode *inode, int mode, | |
3179 | u64 start, u64 num_bytes, u64 min_size, | |
3180 | loff_t actual_len, u64 *alloc_hint); | |
3181 | int btrfs_prealloc_file_range_trans(struct inode *inode, | |
3182 | struct btrfs_trans_handle *trans, int mode, | |
3183 | u64 start, u64 num_bytes, u64 min_size, | |
3184 | loff_t actual_len, u64 *alloc_hint); | |
3185 | extern const struct dentry_operations btrfs_dentry_operations; | |
3186 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
3187 | void btrfs_test_inode_set_ops(struct inode *inode); | |
3188 | #endif | |
3189 | ||
3190 | /* ioctl.c */ | |
3191 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
3192 | long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
3193 | int btrfs_ioctl_get_supported_features(void __user *arg); | |
3194 | void btrfs_update_iflags(struct inode *inode); | |
3195 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); | |
3196 | int btrfs_is_empty_uuid(u8 *uuid); | |
3197 | int btrfs_defrag_file(struct inode *inode, struct file *file, | |
3198 | struct btrfs_ioctl_defrag_range_args *range, | |
3199 | u64 newer_than, unsigned long max_pages); | |
3200 | void btrfs_get_block_group_info(struct list_head *groups_list, | |
3201 | struct btrfs_ioctl_space_info *space); | |
3202 | void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, | |
3203 | struct btrfs_ioctl_balance_args *bargs); | |
3204 | ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, | |
3205 | struct file *dst_file, u64 dst_loff); | |
3206 | ||
3207 | /* file.c */ | |
3208 | int btrfs_auto_defrag_init(void); | |
3209 | void btrfs_auto_defrag_exit(void); | |
3210 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, | |
3211 | struct inode *inode); | |
3212 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); | |
3213 | void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); | |
3214 | int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); | |
3215 | void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, | |
3216 | int skip_pinned); | |
3217 | extern const struct file_operations btrfs_file_operations; | |
3218 | int __btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
3219 | struct btrfs_root *root, struct inode *inode, | |
3220 | struct btrfs_path *path, u64 start, u64 end, | |
3221 | u64 *drop_end, int drop_cache, | |
3222 | int replace_extent, | |
3223 | u32 extent_item_size, | |
3224 | int *key_inserted); | |
3225 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, | |
3226 | struct btrfs_root *root, struct inode *inode, u64 start, | |
3227 | u64 end, int drop_cache); | |
3228 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, | |
3229 | struct inode *inode, u64 start, u64 end); | |
3230 | int btrfs_release_file(struct inode *inode, struct file *file); | |
3231 | int btrfs_dirty_pages(struct inode *inode, struct page **pages, | |
3232 | size_t num_pages, loff_t pos, size_t write_bytes, | |
3233 | struct extent_state **cached); | |
3234 | int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); | |
3235 | ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, | |
3236 | struct file *file_out, loff_t pos_out, | |
3237 | size_t len, unsigned int flags); | |
3238 | int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, | |
3239 | struct file *file_out, loff_t pos_out, u64 len); | |
3240 | ||
3241 | /* tree-defrag.c */ | |
3242 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, | |
3243 | struct btrfs_root *root); | |
3244 | ||
3245 | /* sysfs.c */ | |
3246 | int btrfs_init_sysfs(void); | |
3247 | void btrfs_exit_sysfs(void); | |
3248 | int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); | |
3249 | void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); | |
3250 | ||
3251 | /* xattr.c */ | |
3252 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
3253 | ||
3254 | /* super.c */ | |
3255 | int btrfs_parse_options(struct btrfs_fs_info *info, char *options, | |
3256 | unsigned long new_flags); | |
3257 | int btrfs_sync_fs(struct super_block *sb, int wait); | |
3258 | ||
3259 | static inline __printf(2, 3) | |
3260 | void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) | |
3261 | { | |
3262 | } | |
3263 | ||
3264 | #ifdef CONFIG_PRINTK | |
3265 | __printf(2, 3) | |
3266 | void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); | |
3267 | #else | |
3268 | #define btrfs_printk(fs_info, fmt, args...) \ | |
3269 | btrfs_no_printk(fs_info, fmt, ##args) | |
3270 | #endif | |
3271 | ||
3272 | #define btrfs_emerg(fs_info, fmt, args...) \ | |
3273 | btrfs_printk(fs_info, KERN_EMERG fmt, ##args) | |
3274 | #define btrfs_alert(fs_info, fmt, args...) \ | |
3275 | btrfs_printk(fs_info, KERN_ALERT fmt, ##args) | |
3276 | #define btrfs_crit(fs_info, fmt, args...) \ | |
3277 | btrfs_printk(fs_info, KERN_CRIT fmt, ##args) | |
3278 | #define btrfs_err(fs_info, fmt, args...) \ | |
3279 | btrfs_printk(fs_info, KERN_ERR fmt, ##args) | |
3280 | #define btrfs_warn(fs_info, fmt, args...) \ | |
3281 | btrfs_printk(fs_info, KERN_WARNING fmt, ##args) | |
3282 | #define btrfs_notice(fs_info, fmt, args...) \ | |
3283 | btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) | |
3284 | #define btrfs_info(fs_info, fmt, args...) \ | |
3285 | btrfs_printk(fs_info, KERN_INFO fmt, ##args) | |
3286 | ||
3287 | /* | |
3288 | * Wrappers that use printk_in_rcu | |
3289 | */ | |
3290 | #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ | |
3291 | btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) | |
3292 | #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ | |
3293 | btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) | |
3294 | #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ | |
3295 | btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) | |
3296 | #define btrfs_err_in_rcu(fs_info, fmt, args...) \ | |
3297 | btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) | |
3298 | #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ | |
3299 | btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) | |
3300 | #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ | |
3301 | btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) | |
3302 | #define btrfs_info_in_rcu(fs_info, fmt, args...) \ | |
3303 | btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) | |
3304 | ||
3305 | /* | |
3306 | * Wrappers that use a ratelimited printk_in_rcu | |
3307 | */ | |
3308 | #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ | |
3309 | btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) | |
3310 | #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ | |
3311 | btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) | |
3312 | #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ | |
3313 | btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) | |
3314 | #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ | |
3315 | btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) | |
3316 | #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ | |
3317 | btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) | |
3318 | #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ | |
3319 | btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) | |
3320 | #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ | |
3321 | btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) | |
3322 | ||
3323 | /* | |
3324 | * Wrappers that use a ratelimited printk | |
3325 | */ | |
3326 | #define btrfs_emerg_rl(fs_info, fmt, args...) \ | |
3327 | btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) | |
3328 | #define btrfs_alert_rl(fs_info, fmt, args...) \ | |
3329 | btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) | |
3330 | #define btrfs_crit_rl(fs_info, fmt, args...) \ | |
3331 | btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) | |
3332 | #define btrfs_err_rl(fs_info, fmt, args...) \ | |
3333 | btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) | |
3334 | #define btrfs_warn_rl(fs_info, fmt, args...) \ | |
3335 | btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) | |
3336 | #define btrfs_notice_rl(fs_info, fmt, args...) \ | |
3337 | btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) | |
3338 | #define btrfs_info_rl(fs_info, fmt, args...) \ | |
3339 | btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) | |
3340 | ||
3341 | #if defined(CONFIG_DYNAMIC_DEBUG) | |
3342 | #define btrfs_debug(fs_info, fmt, args...) \ | |
3343 | do { \ | |
3344 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
3345 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ | |
3346 | btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ | |
3347 | } while (0) | |
3348 | #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ | |
3349 | do { \ | |
3350 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
3351 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ | |
3352 | btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ | |
3353 | } while (0) | |
3354 | #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ | |
3355 | do { \ | |
3356 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
3357 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ | |
3358 | btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ | |
3359 | ##args);\ | |
3360 | } while (0) | |
3361 | #define btrfs_debug_rl(fs_info, fmt, args...) \ | |
3362 | do { \ | |
3363 | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ | |
3364 | if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ | |
3365 | btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ | |
3366 | ##args); \ | |
3367 | } while (0) | |
3368 | #elif defined(DEBUG) | |
3369 | #define btrfs_debug(fs_info, fmt, args...) \ | |
3370 | btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) | |
3371 | #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ | |
3372 | btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) | |
3373 | #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ | |
3374 | btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) | |
3375 | #define btrfs_debug_rl(fs_info, fmt, args...) \ | |
3376 | btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) | |
3377 | #else | |
3378 | #define btrfs_debug(fs_info, fmt, args...) \ | |
3379 | btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) | |
3380 | #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ | |
3381 | btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) | |
3382 | #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ | |
3383 | btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) | |
3384 | #define btrfs_debug_rl(fs_info, fmt, args...) \ | |
3385 | btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) | |
3386 | #endif | |
3387 | ||
3388 | #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ | |
3389 | do { \ | |
3390 | rcu_read_lock(); \ | |
3391 | btrfs_printk(fs_info, fmt, ##args); \ | |
3392 | rcu_read_unlock(); \ | |
3393 | } while (0) | |
3394 | ||
3395 | #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ | |
3396 | do { \ | |
3397 | static DEFINE_RATELIMIT_STATE(_rs, \ | |
3398 | DEFAULT_RATELIMIT_INTERVAL, \ | |
3399 | DEFAULT_RATELIMIT_BURST); \ | |
3400 | if (__ratelimit(&_rs)) \ | |
3401 | btrfs_printk(fs_info, fmt, ##args); \ | |
3402 | } while (0) | |
3403 | ||
3404 | #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ | |
3405 | do { \ | |
3406 | rcu_read_lock(); \ | |
3407 | btrfs_printk_ratelimited(fs_info, fmt, ##args); \ | |
3408 | rcu_read_unlock(); \ | |
3409 | } while (0) | |
3410 | ||
3411 | #ifdef CONFIG_BTRFS_ASSERT | |
3412 | ||
3413 | __cold | |
3414 | static inline void assfail(char *expr, char *file, int line) | |
3415 | { | |
3416 | pr_err("assertion failed: %s, file: %s, line: %d\n", | |
3417 | expr, file, line); | |
3418 | BUG(); | |
3419 | } | |
3420 | ||
3421 | #define ASSERT(expr) \ | |
3422 | (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) | |
3423 | #else | |
3424 | #define ASSERT(expr) ((void)0) | |
3425 | #endif | |
3426 | ||
3427 | __printf(5, 6) | |
3428 | __cold | |
3429 | void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, | |
3430 | unsigned int line, int errno, const char *fmt, ...); | |
3431 | ||
3432 | const char *btrfs_decode_error(int errno); | |
3433 | ||
3434 | __cold | |
3435 | void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, | |
3436 | const char *function, | |
3437 | unsigned int line, int errno); | |
3438 | ||
3439 | /* | |
3440 | * Call btrfs_abort_transaction as early as possible when an error condition is | |
3441 | * detected, that way the exact line number is reported. | |
3442 | */ | |
3443 | #define btrfs_abort_transaction(trans, errno) \ | |
3444 | do { \ | |
3445 | /* Report first abort since mount */ \ | |
3446 | if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ | |
3447 | &((trans)->fs_info->fs_state))) { \ | |
3448 | WARN(1, KERN_DEBUG \ | |
3449 | "BTRFS: Transaction aborted (error %d)\n", \ | |
3450 | (errno)); \ | |
3451 | } \ | |
3452 | __btrfs_abort_transaction((trans), __func__, \ | |
3453 | __LINE__, (errno)); \ | |
3454 | } while (0) | |
3455 | ||
3456 | #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ | |
3457 | do { \ | |
3458 | __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ | |
3459 | (errno), fmt, ##args); \ | |
3460 | } while (0) | |
3461 | ||
3462 | __printf(5, 6) | |
3463 | __cold | |
3464 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, | |
3465 | unsigned int line, int errno, const char *fmt, ...); | |
3466 | /* | |
3467 | * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic | |
3468 | * will panic(). Otherwise we BUG() here. | |
3469 | */ | |
3470 | #define btrfs_panic(fs_info, errno, fmt, args...) \ | |
3471 | do { \ | |
3472 | __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ | |
3473 | BUG(); \ | |
3474 | } while (0) | |
3475 | ||
3476 | ||
3477 | /* compatibility and incompatibility defines */ | |
3478 | ||
3479 | #define btrfs_set_fs_incompat(__fs_info, opt) \ | |
3480 | __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
3481 | ||
3482 | static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, | |
3483 | u64 flag) | |
3484 | { | |
3485 | struct btrfs_super_block *disk_super; | |
3486 | u64 features; | |
3487 | ||
3488 | disk_super = fs_info->super_copy; | |
3489 | features = btrfs_super_incompat_flags(disk_super); | |
3490 | if (!(features & flag)) { | |
3491 | spin_lock(&fs_info->super_lock); | |
3492 | features = btrfs_super_incompat_flags(disk_super); | |
3493 | if (!(features & flag)) { | |
3494 | features |= flag; | |
3495 | btrfs_set_super_incompat_flags(disk_super, features); | |
3496 | btrfs_info(fs_info, "setting %llu feature flag", | |
3497 | flag); | |
3498 | } | |
3499 | spin_unlock(&fs_info->super_lock); | |
3500 | } | |
3501 | } | |
3502 | ||
3503 | #define btrfs_clear_fs_incompat(__fs_info, opt) \ | |
3504 | __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
3505 | ||
3506 | static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, | |
3507 | u64 flag) | |
3508 | { | |
3509 | struct btrfs_super_block *disk_super; | |
3510 | u64 features; | |
3511 | ||
3512 | disk_super = fs_info->super_copy; | |
3513 | features = btrfs_super_incompat_flags(disk_super); | |
3514 | if (features & flag) { | |
3515 | spin_lock(&fs_info->super_lock); | |
3516 | features = btrfs_super_incompat_flags(disk_super); | |
3517 | if (features & flag) { | |
3518 | features &= ~flag; | |
3519 | btrfs_set_super_incompat_flags(disk_super, features); | |
3520 | btrfs_info(fs_info, "clearing %llu feature flag", | |
3521 | flag); | |
3522 | } | |
3523 | spin_unlock(&fs_info->super_lock); | |
3524 | } | |
3525 | } | |
3526 | ||
3527 | #define btrfs_fs_incompat(fs_info, opt) \ | |
3528 | __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) | |
3529 | ||
3530 | static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) | |
3531 | { | |
3532 | struct btrfs_super_block *disk_super; | |
3533 | disk_super = fs_info->super_copy; | |
3534 | return !!(btrfs_super_incompat_flags(disk_super) & flag); | |
3535 | } | |
3536 | ||
3537 | #define btrfs_set_fs_compat_ro(__fs_info, opt) \ | |
3538 | __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) | |
3539 | ||
3540 | static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, | |
3541 | u64 flag) | |
3542 | { | |
3543 | struct btrfs_super_block *disk_super; | |
3544 | u64 features; | |
3545 | ||
3546 | disk_super = fs_info->super_copy; | |
3547 | features = btrfs_super_compat_ro_flags(disk_super); | |
3548 | if (!(features & flag)) { | |
3549 | spin_lock(&fs_info->super_lock); | |
3550 | features = btrfs_super_compat_ro_flags(disk_super); | |
3551 | if (!(features & flag)) { | |
3552 | features |= flag; | |
3553 | btrfs_set_super_compat_ro_flags(disk_super, features); | |
3554 | btrfs_info(fs_info, "setting %llu ro feature flag", | |
3555 | flag); | |
3556 | } | |
3557 | spin_unlock(&fs_info->super_lock); | |
3558 | } | |
3559 | } | |
3560 | ||
3561 | #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ | |
3562 | __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) | |
3563 | ||
3564 | static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, | |
3565 | u64 flag) | |
3566 | { | |
3567 | struct btrfs_super_block *disk_super; | |
3568 | u64 features; | |
3569 | ||
3570 | disk_super = fs_info->super_copy; | |
3571 | features = btrfs_super_compat_ro_flags(disk_super); | |
3572 | if (features & flag) { | |
3573 | spin_lock(&fs_info->super_lock); | |
3574 | features = btrfs_super_compat_ro_flags(disk_super); | |
3575 | if (features & flag) { | |
3576 | features &= ~flag; | |
3577 | btrfs_set_super_compat_ro_flags(disk_super, features); | |
3578 | btrfs_info(fs_info, "clearing %llu ro feature flag", | |
3579 | flag); | |
3580 | } | |
3581 | spin_unlock(&fs_info->super_lock); | |
3582 | } | |
3583 | } | |
3584 | ||
3585 | #define btrfs_fs_compat_ro(fs_info, opt) \ | |
3586 | __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) | |
3587 | ||
3588 | static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) | |
3589 | { | |
3590 | struct btrfs_super_block *disk_super; | |
3591 | disk_super = fs_info->super_copy; | |
3592 | return !!(btrfs_super_compat_ro_flags(disk_super) & flag); | |
3593 | } | |
3594 | ||
3595 | /* acl.c */ | |
3596 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL | |
3597 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); | |
3598 | int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); | |
3599 | int btrfs_init_acl(struct btrfs_trans_handle *trans, | |
3600 | struct inode *inode, struct inode *dir); | |
3601 | #else | |
3602 | #define btrfs_get_acl NULL | |
3603 | #define btrfs_set_acl NULL | |
3604 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, | |
3605 | struct inode *inode, struct inode *dir) | |
3606 | { | |
3607 | return 0; | |
3608 | } | |
3609 | #endif | |
3610 | ||
3611 | /* relocation.c */ | |
3612 | int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); | |
3613 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, | |
3614 | struct btrfs_root *root); | |
3615 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, | |
3616 | struct btrfs_root *root); | |
3617 | int btrfs_recover_relocation(struct btrfs_root *root); | |
3618 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); | |
3619 | int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, | |
3620 | struct btrfs_root *root, struct extent_buffer *buf, | |
3621 | struct extent_buffer *cow); | |
3622 | void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, | |
3623 | u64 *bytes_to_reserve); | |
3624 | int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, | |
3625 | struct btrfs_pending_snapshot *pending); | |
3626 | ||
3627 | /* scrub.c */ | |
3628 | int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, | |
3629 | u64 end, struct btrfs_scrub_progress *progress, | |
3630 | int readonly, int is_dev_replace); | |
3631 | void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); | |
3632 | void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); | |
3633 | int btrfs_scrub_cancel(struct btrfs_fs_info *info); | |
3634 | int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, | |
3635 | struct btrfs_device *dev); | |
3636 | int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, | |
3637 | struct btrfs_scrub_progress *progress); | |
3638 | ||
3639 | /* dev-replace.c */ | |
3640 | void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); | |
3641 | void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); | |
3642 | void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); | |
3643 | ||
3644 | static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) | |
3645 | { | |
3646 | btrfs_bio_counter_sub(fs_info, 1); | |
3647 | } | |
3648 | ||
3649 | /* reada.c */ | |
3650 | struct reada_control { | |
3651 | struct btrfs_fs_info *fs_info; /* tree to prefetch */ | |
3652 | struct btrfs_key key_start; | |
3653 | struct btrfs_key key_end; /* exclusive */ | |
3654 | atomic_t elems; | |
3655 | struct kref refcnt; | |
3656 | wait_queue_head_t wait; | |
3657 | }; | |
3658 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, | |
3659 | struct btrfs_key *start, struct btrfs_key *end); | |
3660 | int btrfs_reada_wait(void *handle); | |
3661 | void btrfs_reada_detach(void *handle); | |
3662 | int btree_readahead_hook(struct btrfs_fs_info *fs_info, | |
3663 | struct extent_buffer *eb, int err); | |
3664 | ||
3665 | static inline int is_fstree(u64 rootid) | |
3666 | { | |
3667 | if (rootid == BTRFS_FS_TREE_OBJECTID || | |
3668 | ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && | |
3669 | !btrfs_qgroup_level(rootid))) | |
3670 | return 1; | |
3671 | return 0; | |
3672 | } | |
3673 | ||
3674 | static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) | |
3675 | { | |
3676 | return signal_pending(current); | |
3677 | } | |
3678 | ||
3679 | /* Sanity test specific functions */ | |
3680 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
3681 | void btrfs_test_destroy_inode(struct inode *inode); | |
3682 | #endif | |
3683 | ||
3684 | static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) | |
3685 | { | |
3686 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS | |
3687 | if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, | |
3688 | &fs_info->fs_state))) | |
3689 | return 1; | |
3690 | #endif | |
3691 | return 0; | |
3692 | } | |
3693 | #endif |