Line data Source code
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/workqueue.h>
37 : #include "extent_io.h"
38 : #include "extent_map.h"
39 : #include "async-thread.h"
40 :
41 : struct btrfs_trans_handle;
42 : struct btrfs_transaction;
43 : struct btrfs_pending_snapshot;
44 : extern struct kmem_cache *btrfs_trans_handle_cachep;
45 : extern struct kmem_cache *btrfs_transaction_cachep;
46 : extern struct kmem_cache *btrfs_bit_radix_cachep;
47 : extern struct kmem_cache *btrfs_path_cachep;
48 : extern struct kmem_cache *btrfs_free_space_cachep;
49 : struct btrfs_ordered_sum;
50 :
51 : #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
52 : #define STATIC noinline
53 : #else
54 : #define STATIC static noinline
55 : #endif
56 :
57 : #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
58 :
59 : #define BTRFS_MAX_MIRRORS 3
60 :
61 : #define BTRFS_MAX_LEVEL 8
62 :
63 : #define BTRFS_COMPAT_EXTENT_TREE_V0
64 :
65 : /*
66 : * files bigger than this get some pre-flushing when they are added
67 : * to the ordered operations list. That way we limit the total
68 : * work done by the commit
69 : */
70 : #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
71 :
72 : /* holds pointers to all of the tree roots */
73 : #define BTRFS_ROOT_TREE_OBJECTID 1ULL
74 :
75 : /* stores information about which extents are in use, and reference counts */
76 : #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
77 :
78 : /*
79 : * chunk tree stores translations from logical -> physical block numbering
80 : * the super block points to the chunk tree
81 : */
82 : #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
83 :
84 : /*
85 : * stores information about which areas of a given device are in use.
86 : * one per device. The tree of tree roots points to the device tree
87 : */
88 : #define BTRFS_DEV_TREE_OBJECTID 4ULL
89 :
90 : /* one per subvolume, storing files and directories */
91 : #define BTRFS_FS_TREE_OBJECTID 5ULL
92 :
93 : /* directory objectid inside the root tree */
94 : #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
95 :
96 : /* holds checksums of all the data extents */
97 : #define BTRFS_CSUM_TREE_OBJECTID 7ULL
98 :
99 : /* holds quota configuration and tracking */
100 : #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
101 :
102 : /* for storing items that use the BTRFS_UUID_KEY* types */
103 : #define BTRFS_UUID_TREE_OBJECTID 9ULL
104 :
105 : /* for storing balance parameters in the root tree */
106 : #define BTRFS_BALANCE_OBJECTID -4ULL
107 :
108 : /* orhpan objectid for tracking unlinked/truncated files */
109 : #define BTRFS_ORPHAN_OBJECTID -5ULL
110 :
111 : /* does write ahead logging to speed up fsyncs */
112 : #define BTRFS_TREE_LOG_OBJECTID -6ULL
113 : #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
114 :
115 : /* for space balancing */
116 : #define BTRFS_TREE_RELOC_OBJECTID -8ULL
117 : #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
118 :
119 : /*
120 : * extent checksums all have this objectid
121 : * this allows them to share the logging tree
122 : * for fsyncs
123 : */
124 : #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
125 :
126 : /* For storing free space cache */
127 : #define BTRFS_FREE_SPACE_OBJECTID -11ULL
128 :
129 : /*
130 : * The inode number assigned to the special inode for storing
131 : * free ino cache
132 : */
133 : #define BTRFS_FREE_INO_OBJECTID -12ULL
134 :
135 : /* dummy objectid represents multiple objectids */
136 : #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
137 :
138 : /*
139 : * All files have objectids in this range.
140 : */
141 : #define BTRFS_FIRST_FREE_OBJECTID 256ULL
142 : #define BTRFS_LAST_FREE_OBJECTID -256ULL
143 : #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
144 :
145 :
146 : /*
147 : * the device items go into the chunk tree. The key is in the form
148 : * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
149 : */
150 : #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
151 :
152 : #define BTRFS_BTREE_INODE_OBJECTID 1
153 :
154 : #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
155 :
156 : #define BTRFS_DEV_REPLACE_DEVID 0ULL
157 :
158 : /*
159 : * the max metadata block size. This limit is somewhat artificial,
160 : * but the memmove costs go through the roof for larger blocks.
161 : */
162 : #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
163 :
164 : /*
165 : * we can actually store much bigger names, but lets not confuse the rest
166 : * of linux
167 : */
168 : #define BTRFS_NAME_LEN 255
169 :
170 : /*
171 : * Theoretical limit is larger, but we keep this down to a sane
172 : * value. That should limit greatly the possibility of collisions on
173 : * inode ref items.
174 : */
175 : #define BTRFS_LINK_MAX 65535U
176 :
177 : /* 32 bytes in various csum fields */
178 : #define BTRFS_CSUM_SIZE 32
179 :
180 : /* csum types */
181 : #define BTRFS_CSUM_TYPE_CRC32 0
182 :
183 : static int btrfs_csum_sizes[] = { 4, 0 };
184 :
185 : /* four bytes for CRC32 */
186 : #define BTRFS_EMPTY_DIR_SIZE 0
187 :
188 : /* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
189 : #define REQ_GET_READ_MIRRORS (1 << 30)
190 :
191 : #define BTRFS_FT_UNKNOWN 0
192 : #define BTRFS_FT_REG_FILE 1
193 : #define BTRFS_FT_DIR 2
194 : #define BTRFS_FT_CHRDEV 3
195 : #define BTRFS_FT_BLKDEV 4
196 : #define BTRFS_FT_FIFO 5
197 : #define BTRFS_FT_SOCK 6
198 : #define BTRFS_FT_SYMLINK 7
199 : #define BTRFS_FT_XATTR 8
200 : #define BTRFS_FT_MAX 9
201 :
202 : /* ioprio of readahead is set to idle */
203 : #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
204 :
205 : #define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
206 :
207 : /*
208 : * The key defines the order in the tree, and so it also defines (optimal)
209 : * block layout.
210 : *
211 : * objectid corresponds to the inode number.
212 : *
213 : * type tells us things about the object, and is a kind of stream selector.
214 : * so for a given inode, keys with type of 1 might refer to the inode data,
215 : * type of 2 may point to file data in the btree and type == 3 may point to
216 : * extents.
217 : *
218 : * offset is the starting byte offset for this key in the stream.
219 : *
220 : * btrfs_disk_key is in disk byte order. struct btrfs_key is always
221 : * in cpu native order. Otherwise they are identical and their sizes
222 : * should be the same (ie both packed)
223 : */
224 : struct btrfs_disk_key {
225 : __le64 objectid;
226 : u8 type;
227 : __le64 offset;
228 : } __attribute__ ((__packed__));
229 :
230 : struct btrfs_key {
231 : u64 objectid;
232 : u8 type;
233 : u64 offset;
234 : } __attribute__ ((__packed__));
235 :
236 : struct btrfs_mapping_tree {
237 : struct extent_map_tree map_tree;
238 : };
239 :
240 : struct btrfs_dev_item {
241 : /* the internal btrfs device id */
242 : __le64 devid;
243 :
244 : /* size of the device */
245 : __le64 total_bytes;
246 :
247 : /* bytes used */
248 : __le64 bytes_used;
249 :
250 : /* optimal io alignment for this device */
251 : __le32 io_align;
252 :
253 : /* optimal io width for this device */
254 : __le32 io_width;
255 :
256 : /* minimal io size for this device */
257 : __le32 sector_size;
258 :
259 : /* type and info about this device */
260 : __le64 type;
261 :
262 : /* expected generation for this device */
263 : __le64 generation;
264 :
265 : /*
266 : * starting byte of this partition on the device,
267 : * to allow for stripe alignment in the future
268 : */
269 : __le64 start_offset;
270 :
271 : /* grouping information for allocation decisions */
272 : __le32 dev_group;
273 :
274 : /* seek speed 0-100 where 100 is fastest */
275 : u8 seek_speed;
276 :
277 : /* bandwidth 0-100 where 100 is fastest */
278 : u8 bandwidth;
279 :
280 : /* btrfs generated uuid for this device */
281 : u8 uuid[BTRFS_UUID_SIZE];
282 :
283 : /* uuid of FS who owns this device */
284 : u8 fsid[BTRFS_UUID_SIZE];
285 : } __attribute__ ((__packed__));
286 :
287 : struct btrfs_stripe {
288 : __le64 devid;
289 : __le64 offset;
290 : u8 dev_uuid[BTRFS_UUID_SIZE];
291 : } __attribute__ ((__packed__));
292 :
293 : struct btrfs_chunk {
294 : /* size of this chunk in bytes */
295 : __le64 length;
296 :
297 : /* objectid of the root referencing this chunk */
298 : __le64 owner;
299 :
300 : __le64 stripe_len;
301 : __le64 type;
302 :
303 : /* optimal io alignment for this chunk */
304 : __le32 io_align;
305 :
306 : /* optimal io width for this chunk */
307 : __le32 io_width;
308 :
309 : /* minimal io size for this chunk */
310 : __le32 sector_size;
311 :
312 : /* 2^16 stripes is quite a lot, a second limit is the size of a single
313 : * item in the btree
314 : */
315 : __le16 num_stripes;
316 :
317 : /* sub stripes only matter for raid10 */
318 : __le16 sub_stripes;
319 : struct btrfs_stripe stripe;
320 : /* additional stripes go here */
321 : } __attribute__ ((__packed__));
322 :
323 : #define BTRFS_FREE_SPACE_EXTENT 1
324 : #define BTRFS_FREE_SPACE_BITMAP 2
325 :
326 : struct btrfs_free_space_entry {
327 : __le64 offset;
328 : __le64 bytes;
329 : u8 type;
330 : } __attribute__ ((__packed__));
331 :
332 : struct btrfs_free_space_header {
333 : struct btrfs_disk_key location;
334 : __le64 generation;
335 : __le64 num_entries;
336 : __le64 num_bitmaps;
337 : } __attribute__ ((__packed__));
338 :
339 : static inline unsigned long btrfs_chunk_item_size(int num_stripes)
340 : {
341 571 : BUG_ON(num_stripes == 0);
342 571 : return sizeof(struct btrfs_chunk) +
343 571 : sizeof(struct btrfs_stripe) * (num_stripes - 1);
344 : }
345 :
346 : #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
347 : #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
348 :
349 : /*
350 : * File system states
351 : */
352 : #define BTRFS_FS_STATE_ERROR 0
353 : #define BTRFS_FS_STATE_REMOUNTING 1
354 : #define BTRFS_FS_STATE_TRANS_ABORTED 2
355 : #define BTRFS_FS_STATE_DEV_REPLACING 3
356 :
357 : /* Super block flags */
358 : /* Errors detected */
359 : #define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
360 :
361 : #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
362 : #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
363 :
364 : #define BTRFS_BACKREF_REV_MAX 256
365 : #define BTRFS_BACKREF_REV_SHIFT 56
366 : #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
367 : BTRFS_BACKREF_REV_SHIFT)
368 :
369 : #define BTRFS_OLD_BACKREF_REV 0
370 : #define BTRFS_MIXED_BACKREF_REV 1
371 :
372 : /*
373 : * every tree block (leaf or node) starts with this header.
374 : */
375 : struct btrfs_header {
376 : /* these first four must match the super block */
377 : u8 csum[BTRFS_CSUM_SIZE];
378 : u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
379 : __le64 bytenr; /* which block this node is supposed to live in */
380 : __le64 flags;
381 :
382 : /* allowed to be different from the super from here on down */
383 : u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
384 : __le64 generation;
385 : __le64 owner;
386 : __le32 nritems;
387 : u8 level;
388 : } __attribute__ ((__packed__));
389 :
390 : #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
391 : sizeof(struct btrfs_header)) / \
392 : sizeof(struct btrfs_key_ptr))
393 : #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
394 : #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
395 : #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
396 : sizeof(struct btrfs_item) - \
397 : sizeof(struct btrfs_file_extent_item))
398 : #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
399 : sizeof(struct btrfs_item) -\
400 : sizeof(struct btrfs_dir_item))
401 :
402 :
403 : /*
404 : * this is a very generous portion of the super block, giving us
405 : * room to translate 14 chunks with 3 stripes each.
406 : */
407 : #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
408 : #define BTRFS_LABEL_SIZE 256
409 :
410 : /*
411 : * just in case we somehow lose the roots and are not able to mount,
412 : * we store an array of the roots from previous transactions
413 : * in the super.
414 : */
415 : #define BTRFS_NUM_BACKUP_ROOTS 4
416 : struct btrfs_root_backup {
417 : __le64 tree_root;
418 : __le64 tree_root_gen;
419 :
420 : __le64 chunk_root;
421 : __le64 chunk_root_gen;
422 :
423 : __le64 extent_root;
424 : __le64 extent_root_gen;
425 :
426 : __le64 fs_root;
427 : __le64 fs_root_gen;
428 :
429 : __le64 dev_root;
430 : __le64 dev_root_gen;
431 :
432 : __le64 csum_root;
433 : __le64 csum_root_gen;
434 :
435 : __le64 total_bytes;
436 : __le64 bytes_used;
437 : __le64 num_devices;
438 : /* future */
439 : __le64 unused_64[4];
440 :
441 : u8 tree_root_level;
442 : u8 chunk_root_level;
443 : u8 extent_root_level;
444 : u8 fs_root_level;
445 : u8 dev_root_level;
446 : u8 csum_root_level;
447 : /* future and to align */
448 : u8 unused_8[10];
449 : } __attribute__ ((__packed__));
450 :
451 : /*
452 : * the super block basically lists the main trees of the FS
453 : * it currently lacks any block count etc etc
454 : */
455 : struct btrfs_super_block {
456 : u8 csum[BTRFS_CSUM_SIZE];
457 : /* the first 4 fields must match struct btrfs_header */
458 : u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
459 : __le64 bytenr; /* this block number */
460 : __le64 flags;
461 :
462 : /* allowed to be different from the btrfs_header from here own down */
463 : __le64 magic;
464 : __le64 generation;
465 : __le64 root;
466 : __le64 chunk_root;
467 : __le64 log_root;
468 :
469 : /* this will help find the new super based on the log root */
470 : __le64 log_root_transid;
471 : __le64 total_bytes;
472 : __le64 bytes_used;
473 : __le64 root_dir_objectid;
474 : __le64 num_devices;
475 : __le32 sectorsize;
476 : __le32 nodesize;
477 : __le32 leafsize;
478 : __le32 stripesize;
479 : __le32 sys_chunk_array_size;
480 : __le64 chunk_root_generation;
481 : __le64 compat_flags;
482 : __le64 compat_ro_flags;
483 : __le64 incompat_flags;
484 : __le16 csum_type;
485 : u8 root_level;
486 : u8 chunk_root_level;
487 : u8 log_root_level;
488 : struct btrfs_dev_item dev_item;
489 :
490 : char label[BTRFS_LABEL_SIZE];
491 :
492 : __le64 cache_generation;
493 : __le64 uuid_tree_generation;
494 :
495 : /* future expansion */
496 : __le64 reserved[30];
497 : u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
498 : struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
499 : } __attribute__ ((__packed__));
500 :
501 : /*
502 : * Compat flags that we support. If any incompat flags are set other than the
503 : * ones specified below then we will fail to mount
504 : */
505 : #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
506 : #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
507 : #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
508 : #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
509 : /*
510 : * some patches floated around with a second compression method
511 : * lets save that incompat here for when they do get in
512 : * Note we don't actually support it, we're just reserving the
513 : * number
514 : */
515 : #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
516 :
517 : /*
518 : * older kernels tried to do bigger metadata blocks, but the
519 : * code was pretty buggy. Lets not let them try anymore.
520 : */
521 : #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
522 :
523 : #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
524 : #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
525 : #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
526 : #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
527 :
528 : #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
529 : #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
530 : #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
531 : #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
532 : #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
533 : #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
534 :
535 : #define BTRFS_FEATURE_INCOMPAT_SUPP \
536 : (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
537 : BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
538 : BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
539 : BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
540 : BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
541 : BTRFS_FEATURE_INCOMPAT_RAID56 | \
542 : BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
543 : BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
544 : BTRFS_FEATURE_INCOMPAT_NO_HOLES)
545 :
546 : #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
547 : (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
548 : #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
549 :
550 : /*
551 : * A leaf is full of items. offset and size tell us where to find
552 : * the item in the leaf (relative to the start of the data area)
553 : */
554 : struct btrfs_item {
555 : struct btrfs_disk_key key;
556 : __le32 offset;
557 : __le32 size;
558 : } __attribute__ ((__packed__));
559 :
560 : /*
561 : * leaves have an item area and a data area:
562 : * [item0, item1....itemN] [free space] [dataN...data1, data0]
563 : *
564 : * The data is separate from the items to get the keys closer together
565 : * during searches.
566 : */
567 : struct btrfs_leaf {
568 : struct btrfs_header header;
569 : struct btrfs_item items[];
570 : } __attribute__ ((__packed__));
571 :
572 : /*
573 : * all non-leaf blocks are nodes, they hold only keys and pointers to
574 : * other blocks
575 : */
576 : struct btrfs_key_ptr {
577 : struct btrfs_disk_key key;
578 : __le64 blockptr;
579 : __le64 generation;
580 : } __attribute__ ((__packed__));
581 :
582 : struct btrfs_node {
583 : struct btrfs_header header;
584 : struct btrfs_key_ptr ptrs[];
585 : } __attribute__ ((__packed__));
586 :
587 : /*
588 : * btrfs_paths remember the path taken from the root down to the leaf.
589 : * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
590 : * to any other levels that are present.
591 : *
592 : * The slots array records the index of the item or block pointer
593 : * used while walking the tree.
594 : */
595 : struct btrfs_path {
596 : struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
597 : int slots[BTRFS_MAX_LEVEL];
598 : /* if there is real range locking, this locks field will change */
599 : int locks[BTRFS_MAX_LEVEL];
600 : int reada;
601 : /* keep some upper locks as we walk down */
602 : int lowest_level;
603 :
604 : /*
605 : * set by btrfs_split_item, tells search_slot to keep all locks
606 : * and to force calls to keep space in the nodes
607 : */
608 : unsigned int search_for_split:1;
609 : unsigned int keep_locks:1;
610 : unsigned int skip_locking:1;
611 : unsigned int leave_spinning:1;
612 : unsigned int search_commit_root:1;
613 : unsigned int need_commit_sem:1;
614 : };
615 :
616 : /*
617 : * items in the extent btree are used to record the objectid of the
618 : * owner of the block and the number of references
619 : */
620 :
621 : struct btrfs_extent_item {
622 : __le64 refs;
623 : __le64 generation;
624 : __le64 flags;
625 : } __attribute__ ((__packed__));
626 :
627 : struct btrfs_extent_item_v0 {
628 : __le32 refs;
629 : } __attribute__ ((__packed__));
630 :
631 : #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
632 : sizeof(struct btrfs_item))
633 :
634 : #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
635 : #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
636 :
637 : /* following flags only apply to tree blocks */
638 :
639 : /* use full backrefs for extent pointers in the block */
640 : #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
641 :
642 : /*
643 : * this flag is only used internally by scrub and may be changed at any time
644 : * it is only declared here to avoid collisions
645 : */
646 : #define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
647 :
648 : struct btrfs_tree_block_info {
649 : struct btrfs_disk_key key;
650 : u8 level;
651 : } __attribute__ ((__packed__));
652 :
653 : struct btrfs_extent_data_ref {
654 : __le64 root;
655 : __le64 objectid;
656 : __le64 offset;
657 : __le32 count;
658 : } __attribute__ ((__packed__));
659 :
660 : struct btrfs_shared_data_ref {
661 : __le32 count;
662 : } __attribute__ ((__packed__));
663 :
664 : struct btrfs_extent_inline_ref {
665 : u8 type;
666 : __le64 offset;
667 : } __attribute__ ((__packed__));
668 :
669 : /* old style backrefs item */
670 : struct btrfs_extent_ref_v0 {
671 : __le64 root;
672 : __le64 generation;
673 : __le64 objectid;
674 : __le32 count;
675 : } __attribute__ ((__packed__));
676 :
677 :
678 : /* dev extents record free space on individual devices. The owner
679 : * field points back to the chunk allocation mapping tree that allocated
680 : * the extent. The chunk tree uuid field is a way to double check the owner
681 : */
682 : struct btrfs_dev_extent {
683 : __le64 chunk_tree;
684 : __le64 chunk_objectid;
685 : __le64 chunk_offset;
686 : __le64 length;
687 : u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
688 : } __attribute__ ((__packed__));
689 :
690 : struct btrfs_inode_ref {
691 : __le64 index;
692 : __le16 name_len;
693 : /* name goes here */
694 : } __attribute__ ((__packed__));
695 :
696 : struct btrfs_inode_extref {
697 : __le64 parent_objectid;
698 : __le64 index;
699 : __le16 name_len;
700 : __u8 name[0];
701 : /* name goes here */
702 : } __attribute__ ((__packed__));
703 :
704 : struct btrfs_timespec {
705 : __le64 sec;
706 : __le32 nsec;
707 : } __attribute__ ((__packed__));
708 :
709 : enum btrfs_compression_type {
710 : BTRFS_COMPRESS_NONE = 0,
711 : BTRFS_COMPRESS_ZLIB = 1,
712 : BTRFS_COMPRESS_LZO = 2,
713 : BTRFS_COMPRESS_TYPES = 2,
714 : BTRFS_COMPRESS_LAST = 3,
715 : };
716 :
717 : struct btrfs_inode_item {
718 : /* nfs style generation number */
719 : __le64 generation;
720 : /* transid that last touched this inode */
721 : __le64 transid;
722 : __le64 size;
723 : __le64 nbytes;
724 : __le64 block_group;
725 : __le32 nlink;
726 : __le32 uid;
727 : __le32 gid;
728 : __le32 mode;
729 : __le64 rdev;
730 : __le64 flags;
731 :
732 : /* modification sequence number for NFS */
733 : __le64 sequence;
734 :
735 : /*
736 : * a little future expansion, for more than this we can
737 : * just grow the inode item and version it
738 : */
739 : __le64 reserved[4];
740 : struct btrfs_timespec atime;
741 : struct btrfs_timespec ctime;
742 : struct btrfs_timespec mtime;
743 : struct btrfs_timespec otime;
744 : } __attribute__ ((__packed__));
745 :
746 : struct btrfs_dir_log_item {
747 : __le64 end;
748 : } __attribute__ ((__packed__));
749 :
750 : struct btrfs_dir_item {
751 : struct btrfs_disk_key location;
752 : __le64 transid;
753 : __le16 data_len;
754 : __le16 name_len;
755 : u8 type;
756 : } __attribute__ ((__packed__));
757 :
758 : #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
759 :
760 : /*
761 : * Internal in-memory flag that a subvolume has been marked for deletion but
762 : * still visible as a directory
763 : */
764 : #define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
765 :
766 : struct btrfs_root_item {
767 : struct btrfs_inode_item inode;
768 : __le64 generation;
769 : __le64 root_dirid;
770 : __le64 bytenr;
771 : __le64 byte_limit;
772 : __le64 bytes_used;
773 : __le64 last_snapshot;
774 : __le64 flags;
775 : __le32 refs;
776 : struct btrfs_disk_key drop_progress;
777 : u8 drop_level;
778 : u8 level;
779 :
780 : /*
781 : * The following fields appear after subvol_uuids+subvol_times
782 : * were introduced.
783 : */
784 :
785 : /*
786 : * This generation number is used to test if the new fields are valid
787 : * and up to date while reading the root item. Everytime the root item
788 : * is written out, the "generation" field is copied into this field. If
789 : * anyone ever mounted the fs with an older kernel, we will have
790 : * mismatching generation values here and thus must invalidate the
791 : * new fields. See btrfs_update_root and btrfs_find_last_root for
792 : * details.
793 : * the offset of generation_v2 is also used as the start for the memset
794 : * when invalidating the fields.
795 : */
796 : __le64 generation_v2;
797 : u8 uuid[BTRFS_UUID_SIZE];
798 : u8 parent_uuid[BTRFS_UUID_SIZE];
799 : u8 received_uuid[BTRFS_UUID_SIZE];
800 : __le64 ctransid; /* updated when an inode changes */
801 : __le64 otransid; /* trans when created */
802 : __le64 stransid; /* trans when sent. non-zero for received subvol */
803 : __le64 rtransid; /* trans when received. non-zero for received subvol */
804 : struct btrfs_timespec ctime;
805 : struct btrfs_timespec otime;
806 : struct btrfs_timespec stime;
807 : struct btrfs_timespec rtime;
808 : __le64 reserved[8]; /* for future */
809 : } __attribute__ ((__packed__));
810 :
811 : /*
812 : * this is used for both forward and backward root refs
813 : */
814 : struct btrfs_root_ref {
815 : __le64 dirid;
816 : __le64 sequence;
817 : __le16 name_len;
818 : } __attribute__ ((__packed__));
819 :
820 : struct btrfs_disk_balance_args {
821 : /*
822 : * profiles to operate on, single is denoted by
823 : * BTRFS_AVAIL_ALLOC_BIT_SINGLE
824 : */
825 : __le64 profiles;
826 :
827 : /* usage filter */
828 : __le64 usage;
829 :
830 : /* devid filter */
831 : __le64 devid;
832 :
833 : /* devid subset filter [pstart..pend) */
834 : __le64 pstart;
835 : __le64 pend;
836 :
837 : /* btrfs virtual address space subset filter [vstart..vend) */
838 : __le64 vstart;
839 : __le64 vend;
840 :
841 : /*
842 : * profile to convert to, single is denoted by
843 : * BTRFS_AVAIL_ALLOC_BIT_SINGLE
844 : */
845 : __le64 target;
846 :
847 : /* BTRFS_BALANCE_ARGS_* */
848 : __le64 flags;
849 :
850 : /* BTRFS_BALANCE_ARGS_LIMIT value */
851 : __le64 limit;
852 :
853 : __le64 unused[7];
854 : } __attribute__ ((__packed__));
855 :
856 : /*
857 : * store balance parameters to disk so that balance can be properly
858 : * resumed after crash or unmount
859 : */
860 : struct btrfs_balance_item {
861 : /* BTRFS_BALANCE_* */
862 : __le64 flags;
863 :
864 : struct btrfs_disk_balance_args data;
865 : struct btrfs_disk_balance_args meta;
866 : struct btrfs_disk_balance_args sys;
867 :
868 : __le64 unused[4];
869 : } __attribute__ ((__packed__));
870 :
871 : #define BTRFS_FILE_EXTENT_INLINE 0
872 : #define BTRFS_FILE_EXTENT_REG 1
873 : #define BTRFS_FILE_EXTENT_PREALLOC 2
874 :
875 : struct btrfs_file_extent_item {
876 : /*
877 : * transaction id that created this extent
878 : */
879 : __le64 generation;
880 : /*
881 : * max number of bytes to hold this extent in ram
882 : * when we split a compressed extent we can't know how big
883 : * each of the resulting pieces will be. So, this is
884 : * an upper limit on the size of the extent in ram instead of
885 : * an exact limit.
886 : */
887 : __le64 ram_bytes;
888 :
889 : /*
890 : * 32 bits for the various ways we might encode the data,
891 : * including compression and encryption. If any of these
892 : * are set to something a given disk format doesn't understand
893 : * it is treated like an incompat flag for reading and writing,
894 : * but not for stat.
895 : */
896 : u8 compression;
897 : u8 encryption;
898 : __le16 other_encoding; /* spare for later use */
899 :
900 : /* are we inline data or a real extent? */
901 : u8 type;
902 :
903 : /*
904 : * disk space consumed by the extent, checksum blocks are included
905 : * in these numbers
906 : */
907 : __le64 disk_bytenr;
908 : __le64 disk_num_bytes;
909 : /*
910 : * the logical offset in file blocks (no csums)
911 : * this extent record is for. This allows a file extent to point
912 : * into the middle of an existing extent on disk, sharing it
913 : * between two snapshots (useful if some bytes in the middle of the
914 : * extent have changed
915 : */
916 : __le64 offset;
917 : /*
918 : * the logical number of file blocks (no csums included). This
919 : * always reflects the size uncompressed and without encoding.
920 : */
921 : __le64 num_bytes;
922 :
923 : } __attribute__ ((__packed__));
924 :
925 : struct btrfs_csum_item {
926 : u8 csum;
927 : } __attribute__ ((__packed__));
928 :
929 : struct btrfs_dev_stats_item {
930 : /*
931 : * grow this item struct at the end for future enhancements and keep
932 : * the existing values unchanged
933 : */
934 : __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
935 : } __attribute__ ((__packed__));
936 :
937 : #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
938 : #define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
939 : #define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
940 : #define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
941 : #define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
942 : #define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
943 : #define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
944 :
945 : struct btrfs_dev_replace {
946 : u64 replace_state; /* see #define above */
947 : u64 time_started; /* seconds since 1-Jan-1970 */
948 : u64 time_stopped; /* seconds since 1-Jan-1970 */
949 : atomic64_t num_write_errors;
950 : atomic64_t num_uncorrectable_read_errors;
951 :
952 : u64 cursor_left;
953 : u64 committed_cursor_left;
954 : u64 cursor_left_last_write_of_item;
955 : u64 cursor_right;
956 :
957 : u64 cont_reading_from_srcdev_mode; /* see #define above */
958 :
959 : int is_valid;
960 : int item_needs_writeback;
961 : struct btrfs_device *srcdev;
962 : struct btrfs_device *tgtdev;
963 :
964 : pid_t lock_owner;
965 : atomic_t nesting_level;
966 : struct mutex lock_finishing_cancel_unmount;
967 : struct mutex lock_management_lock;
968 : struct mutex lock;
969 :
970 : struct btrfs_scrub_progress scrub_progress;
971 : };
972 :
973 : struct btrfs_dev_replace_item {
974 : /*
975 : * grow this item struct at the end for future enhancements and keep
976 : * the existing values unchanged
977 : */
978 : __le64 src_devid;
979 : __le64 cursor_left;
980 : __le64 cursor_right;
981 : __le64 cont_reading_from_srcdev_mode;
982 :
983 : __le64 replace_state;
984 : __le64 time_started;
985 : __le64 time_stopped;
986 : __le64 num_write_errors;
987 : __le64 num_uncorrectable_read_errors;
988 : } __attribute__ ((__packed__));
989 :
990 : /* different types of block groups (and chunks) */
991 : #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
992 : #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
993 : #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
994 : #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
995 : #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
996 : #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
997 : #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
998 : #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
999 : #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
1000 : #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
1001 : BTRFS_SPACE_INFO_GLOBAL_RSV)
1002 :
1003 : enum btrfs_raid_types {
1004 : BTRFS_RAID_RAID10,
1005 : BTRFS_RAID_RAID1,
1006 : BTRFS_RAID_DUP,
1007 : BTRFS_RAID_RAID0,
1008 : BTRFS_RAID_SINGLE,
1009 : BTRFS_RAID_RAID5,
1010 : BTRFS_RAID_RAID6,
1011 : BTRFS_NR_RAID_TYPES
1012 : };
1013 :
1014 : #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
1015 : BTRFS_BLOCK_GROUP_SYSTEM | \
1016 : BTRFS_BLOCK_GROUP_METADATA)
1017 :
1018 : #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
1019 : BTRFS_BLOCK_GROUP_RAID1 | \
1020 : BTRFS_BLOCK_GROUP_RAID5 | \
1021 : BTRFS_BLOCK_GROUP_RAID6 | \
1022 : BTRFS_BLOCK_GROUP_DUP | \
1023 : BTRFS_BLOCK_GROUP_RAID10)
1024 : /*
1025 : * We need a bit for restriper to be able to tell when chunks of type
1026 : * SINGLE are available. This "extended" profile format is used in
1027 : * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
1028 : * (on-disk). The corresponding on-disk bit in chunk.type is reserved
1029 : * to avoid remappings between two formats in future.
1030 : */
1031 : #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
1032 :
1033 : /*
1034 : * A fake block group type that is used to communicate global block reserve
1035 : * size to userspace via the SPACE_INFO ioctl.
1036 : */
1037 : #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
1038 :
1039 : #define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
1040 : BTRFS_AVAIL_ALLOC_BIT_SINGLE)
1041 :
1042 : static inline u64 chunk_to_extended(u64 flags)
1043 : {
1044 1234 : if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
1045 741 : flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1046 :
1047 : return flags;
1048 : }
1049 : static inline u64 extended_to_chunk(u64 flags)
1050 : {
1051 166793 : return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
1052 : }
1053 :
1054 : struct btrfs_block_group_item {
1055 : __le64 used;
1056 : __le64 chunk_objectid;
1057 : __le64 flags;
1058 : } __attribute__ ((__packed__));
1059 :
1060 : /*
1061 : * is subvolume quota turned on?
1062 : */
1063 : #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1064 : /*
1065 : * RESCAN is set during the initialization phase
1066 : */
1067 : #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1068 : /*
1069 : * Some qgroup entries are known to be out of date,
1070 : * either because the configuration has changed in a way that
1071 : * makes a rescan necessary, or because the fs has been mounted
1072 : * with a non-qgroup-aware version.
1073 : * Turning qouta off and on again makes it inconsistent, too.
1074 : */
1075 : #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1076 :
1077 : #define BTRFS_QGROUP_STATUS_VERSION 1
1078 :
1079 : struct btrfs_qgroup_status_item {
1080 : __le64 version;
1081 : /*
1082 : * the generation is updated during every commit. As older
1083 : * versions of btrfs are not aware of qgroups, it will be
1084 : * possible to detect inconsistencies by checking the
1085 : * generation on mount time
1086 : */
1087 : __le64 generation;
1088 :
1089 : /* flag definitions see above */
1090 : __le64 flags;
1091 :
1092 : /*
1093 : * only used during scanning to record the progress
1094 : * of the scan. It contains a logical address
1095 : */
1096 : __le64 rescan;
1097 : } __attribute__ ((__packed__));
1098 :
1099 : struct btrfs_qgroup_info_item {
1100 : __le64 generation;
1101 : __le64 rfer;
1102 : __le64 rfer_cmpr;
1103 : __le64 excl;
1104 : __le64 excl_cmpr;
1105 : } __attribute__ ((__packed__));
1106 :
1107 : /* flags definition for qgroup limits */
1108 : #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1109 : #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1110 : #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1111 : #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1112 : #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1113 : #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1114 :
1115 : struct btrfs_qgroup_limit_item {
1116 : /*
1117 : * only updated when any of the other values change
1118 : */
1119 : __le64 flags;
1120 : __le64 max_rfer;
1121 : __le64 max_excl;
1122 : __le64 rsv_rfer;
1123 : __le64 rsv_excl;
1124 : } __attribute__ ((__packed__));
1125 :
1126 : /* For raid type sysfs entries */
1127 : struct raid_kobject {
1128 : int raid_type;
1129 : struct kobject kobj;
1130 : };
1131 :
1132 : struct btrfs_space_info {
1133 : spinlock_t lock;
1134 :
1135 : u64 total_bytes; /* total bytes in the space,
1136 : this doesn't take mirrors into account */
1137 : u64 bytes_used; /* total bytes used,
1138 : this doesn't take mirrors into account */
1139 : u64 bytes_pinned; /* total bytes pinned, will be freed when the
1140 : transaction finishes */
1141 : u64 bytes_reserved; /* total bytes the allocator has reserved for
1142 : current allocations */
1143 : u64 bytes_may_use; /* number of bytes that may be used for
1144 : delalloc/allocations */
1145 : u64 bytes_readonly; /* total bytes that are read only */
1146 :
1147 : unsigned int full:1; /* indicates that we cannot allocate any more
1148 : chunks for this space */
1149 : unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
1150 :
1151 : unsigned int flush:1; /* set if we are trying to make space */
1152 :
1153 : unsigned int force_alloc; /* set if we need to force a chunk
1154 : alloc for this space */
1155 :
1156 : u64 disk_used; /* total bytes used on disk */
1157 : u64 disk_total; /* total bytes on disk, takes mirrors into
1158 : account */
1159 :
1160 : u64 flags;
1161 :
1162 : /*
1163 : * bytes_pinned is kept in line with what is actually pinned, as in
1164 : * we've called update_block_group and dropped the bytes_used counter
1165 : * and increased the bytes_pinned counter. However this means that
1166 : * bytes_pinned does not reflect the bytes that will be pinned once the
1167 : * delayed refs are flushed, so this counter is inc'ed everytime we call
1168 : * btrfs_free_extent so it is a realtime count of what will be freed
1169 : * once the transaction is committed. It will be zero'ed everytime the
1170 : * transaction commits.
1171 : */
1172 : struct percpu_counter total_bytes_pinned;
1173 :
1174 : struct list_head list;
1175 :
1176 : struct rw_semaphore groups_sem;
1177 : /* for block groups in our same type */
1178 : struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1179 : wait_queue_head_t wait;
1180 :
1181 : struct kobject kobj;
1182 : struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
1183 : };
1184 :
1185 : #define BTRFS_BLOCK_RSV_GLOBAL 1
1186 : #define BTRFS_BLOCK_RSV_DELALLOC 2
1187 : #define BTRFS_BLOCK_RSV_TRANS 3
1188 : #define BTRFS_BLOCK_RSV_CHUNK 4
1189 : #define BTRFS_BLOCK_RSV_DELOPS 5
1190 : #define BTRFS_BLOCK_RSV_EMPTY 6
1191 : #define BTRFS_BLOCK_RSV_TEMP 7
1192 :
1193 : struct btrfs_block_rsv {
1194 : u64 size;
1195 : u64 reserved;
1196 : struct btrfs_space_info *space_info;
1197 : spinlock_t lock;
1198 : unsigned short full;
1199 : unsigned short type;
1200 : unsigned short failfast;
1201 : };
1202 :
1203 : /*
1204 : * free clusters are used to claim free space in relatively large chunks,
1205 : * allowing us to do less seeky writes. They are used for all metadata
1206 : * allocations and data allocations in ssd mode.
1207 : */
1208 : struct btrfs_free_cluster {
1209 : spinlock_t lock;
1210 : spinlock_t refill_lock;
1211 : struct rb_root root;
1212 :
1213 : /* largest extent in this cluster */
1214 : u64 max_size;
1215 :
1216 : /* first extent starting offset */
1217 : u64 window_start;
1218 :
1219 : struct btrfs_block_group_cache *block_group;
1220 : /*
1221 : * when a cluster is allocated from a block group, we put the
1222 : * cluster onto a list in the block group so that it can
1223 : * be freed before the block group is freed.
1224 : */
1225 : struct list_head block_group_list;
1226 : };
1227 :
1228 : enum btrfs_caching_type {
1229 : BTRFS_CACHE_NO = 0,
1230 : BTRFS_CACHE_STARTED = 1,
1231 : BTRFS_CACHE_FAST = 2,
1232 : BTRFS_CACHE_FINISHED = 3,
1233 : BTRFS_CACHE_ERROR = 4,
1234 : };
1235 :
1236 : enum btrfs_disk_cache_state {
1237 : BTRFS_DC_WRITTEN = 0,
1238 : BTRFS_DC_ERROR = 1,
1239 : BTRFS_DC_CLEAR = 2,
1240 : BTRFS_DC_SETUP = 3,
1241 : BTRFS_DC_NEED_WRITE = 4,
1242 : };
1243 :
1244 : struct btrfs_caching_control {
1245 : struct list_head list;
1246 : struct mutex mutex;
1247 : wait_queue_head_t wait;
1248 : struct btrfs_work work;
1249 : struct btrfs_block_group_cache *block_group;
1250 : u64 progress;
1251 : atomic_t count;
1252 : };
1253 :
1254 : struct btrfs_block_group_cache {
1255 : struct btrfs_key key;
1256 : struct btrfs_block_group_item item;
1257 : struct btrfs_fs_info *fs_info;
1258 : struct inode *inode;
1259 : spinlock_t lock;
1260 : u64 pinned;
1261 : u64 reserved;
1262 : u64 delalloc_bytes;
1263 : u64 bytes_super;
1264 : u64 flags;
1265 : u64 sectorsize;
1266 : u64 cache_generation;
1267 :
1268 : /*
1269 : * It is just used for the delayed data space allocation because
1270 : * only the data space allocation and the relative metadata update
1271 : * can be done cross the transaction.
1272 : */
1273 : struct rw_semaphore data_rwsem;
1274 :
1275 : /* for raid56, this is a full stripe, without parity */
1276 : unsigned long full_stripe_len;
1277 :
1278 : unsigned int ro:1;
1279 : unsigned int dirty:1;
1280 : unsigned int iref:1;
1281 :
1282 : int disk_cache_state;
1283 :
1284 : /* cache tracking stuff */
1285 : int cached;
1286 : struct btrfs_caching_control *caching_ctl;
1287 : u64 last_byte_to_unpin;
1288 :
1289 : struct btrfs_space_info *space_info;
1290 :
1291 : /* free space cache stuff */
1292 : struct btrfs_free_space_ctl *free_space_ctl;
1293 :
1294 : /* block group cache stuff */
1295 : struct rb_node cache_node;
1296 :
1297 : /* for block groups in the same raid type */
1298 : struct list_head list;
1299 :
1300 : /* usage count */
1301 : atomic_t count;
1302 :
1303 : /* List of struct btrfs_free_clusters for this block group.
1304 : * Today it will only have one thing on it, but that may change
1305 : */
1306 : struct list_head cluster_list;
1307 :
1308 : /* For delayed block group creation */
1309 : struct list_head new_bg_list;
1310 : };
1311 :
1312 : /* delayed seq elem */
1313 : struct seq_list {
1314 : struct list_head list;
1315 : u64 seq;
1316 : };
1317 :
1318 : enum btrfs_orphan_cleanup_state {
1319 : ORPHAN_CLEANUP_STARTED = 1,
1320 : ORPHAN_CLEANUP_DONE = 2,
1321 : };
1322 :
1323 : /* used by the raid56 code to lock stripes for read/modify/write */
1324 : struct btrfs_stripe_hash {
1325 : struct list_head hash_list;
1326 : wait_queue_head_t wait;
1327 : spinlock_t lock;
1328 : };
1329 :
1330 : /* used by the raid56 code to lock stripes for read/modify/write */
1331 : struct btrfs_stripe_hash_table {
1332 : struct list_head stripe_cache;
1333 : spinlock_t cache_lock;
1334 : int cache_size;
1335 : struct btrfs_stripe_hash table[];
1336 : };
1337 :
1338 : #define BTRFS_STRIPE_HASH_TABLE_BITS 11
1339 :
1340 : void btrfs_init_async_reclaim_work(struct work_struct *work);
1341 :
1342 : /* fs_info */
1343 : struct reloc_control;
1344 : struct btrfs_device;
1345 : struct btrfs_fs_devices;
1346 : struct btrfs_balance_control;
1347 : struct btrfs_delayed_root;
1348 : struct btrfs_fs_info {
1349 : u8 fsid[BTRFS_FSID_SIZE];
1350 : u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1351 : struct btrfs_root *extent_root;
1352 : struct btrfs_root *tree_root;
1353 : struct btrfs_root *chunk_root;
1354 : struct btrfs_root *dev_root;
1355 : struct btrfs_root *fs_root;
1356 : struct btrfs_root *csum_root;
1357 : struct btrfs_root *quota_root;
1358 : struct btrfs_root *uuid_root;
1359 :
1360 : /* the log root tree is a directory of all the other log roots */
1361 : struct btrfs_root *log_root_tree;
1362 :
1363 : spinlock_t fs_roots_radix_lock;
1364 : struct radix_tree_root fs_roots_radix;
1365 :
1366 : /* block group cache stuff */
1367 : spinlock_t block_group_cache_lock;
1368 : u64 first_logical_byte;
1369 : struct rb_root block_group_cache_tree;
1370 :
1371 : /* keep track of unallocated space */
1372 : spinlock_t free_chunk_lock;
1373 : u64 free_chunk_space;
1374 :
1375 : struct extent_io_tree freed_extents[2];
1376 : struct extent_io_tree *pinned_extents;
1377 :
1378 : /* logical->physical extent mapping */
1379 : struct btrfs_mapping_tree mapping_tree;
1380 :
1381 : /*
1382 : * block reservation for extent, checksum, root tree and
1383 : * delayed dir index item
1384 : */
1385 : struct btrfs_block_rsv global_block_rsv;
1386 : /* block reservation for delay allocation */
1387 : struct btrfs_block_rsv delalloc_block_rsv;
1388 : /* block reservation for metadata operations */
1389 : struct btrfs_block_rsv trans_block_rsv;
1390 : /* block reservation for chunk tree */
1391 : struct btrfs_block_rsv chunk_block_rsv;
1392 : /* block reservation for delayed operations */
1393 : struct btrfs_block_rsv delayed_block_rsv;
1394 :
1395 : struct btrfs_block_rsv empty_block_rsv;
1396 :
1397 : u64 generation;
1398 : u64 last_trans_committed;
1399 : u64 avg_delayed_ref_runtime;
1400 :
1401 : /*
1402 : * this is updated to the current trans every time a full commit
1403 : * is required instead of the faster short fsync log commits
1404 : */
1405 : u64 last_trans_log_full_commit;
1406 : unsigned long mount_opt;
1407 : unsigned long compress_type:4;
1408 : int commit_interval;
1409 : /*
1410 : * It is a suggestive number, the read side is safe even it gets a
1411 : * wrong number because we will write out the data into a regular
1412 : * extent. The write side(mount/remount) is under ->s_umount lock,
1413 : * so it is also safe.
1414 : */
1415 : u64 max_inline;
1416 : /*
1417 : * Protected by ->chunk_mutex and sb->s_umount.
1418 : *
1419 : * The reason that we use two lock to protect it is because only
1420 : * remount and mount operations can change it and these two operations
1421 : * are under sb->s_umount, but the read side (chunk allocation) can not
1422 : * acquire sb->s_umount or the deadlock would happen. So we use two
1423 : * locks to protect it. On the write side, we must acquire two locks,
1424 : * and on the read side, we just need acquire one of them.
1425 : */
1426 : u64 alloc_start;
1427 : struct btrfs_transaction *running_transaction;
1428 : wait_queue_head_t transaction_throttle;
1429 : wait_queue_head_t transaction_wait;
1430 : wait_queue_head_t transaction_blocked_wait;
1431 : wait_queue_head_t async_submit_wait;
1432 :
1433 : /*
1434 : * Used to protect the incompat_flags, compat_flags, compat_ro_flags
1435 : * when they are updated.
1436 : *
1437 : * Because we do not clear the flags for ever, so we needn't use
1438 : * the lock on the read side.
1439 : *
1440 : * We also needn't use the lock when we mount the fs, because
1441 : * there is no other task which will update the flag.
1442 : */
1443 : spinlock_t super_lock;
1444 : struct btrfs_super_block *super_copy;
1445 : struct btrfs_super_block *super_for_commit;
1446 : struct block_device *__bdev;
1447 : struct super_block *sb;
1448 : struct inode *btree_inode;
1449 : struct backing_dev_info bdi;
1450 : struct mutex tree_log_mutex;
1451 : struct mutex transaction_kthread_mutex;
1452 : struct mutex cleaner_mutex;
1453 : struct mutex chunk_mutex;
1454 : struct mutex volume_mutex;
1455 :
1456 : /* this is used during read/modify/write to make sure
1457 : * no two ios are trying to mod the same stripe at the same
1458 : * time
1459 : */
1460 : struct btrfs_stripe_hash_table *stripe_hash_table;
1461 :
1462 : /*
1463 : * this protects the ordered operations list only while we are
1464 : * processing all of the entries on it. This way we make
1465 : * sure the commit code doesn't find the list temporarily empty
1466 : * because another function happens to be doing non-waiting preflush
1467 : * before jumping into the main commit.
1468 : */
1469 : struct mutex ordered_operations_mutex;
1470 :
1471 : /*
1472 : * Same as ordered_operations_mutex except this is for ordered extents
1473 : * and not the operations.
1474 : */
1475 : struct mutex ordered_extent_flush_mutex;
1476 :
1477 : struct rw_semaphore commit_root_sem;
1478 :
1479 : struct rw_semaphore cleanup_work_sem;
1480 :
1481 : struct rw_semaphore subvol_sem;
1482 : struct srcu_struct subvol_srcu;
1483 :
1484 : spinlock_t trans_lock;
1485 : /*
1486 : * the reloc mutex goes with the trans lock, it is taken
1487 : * during commit to protect us from the relocation code
1488 : */
1489 : struct mutex reloc_mutex;
1490 :
1491 : struct list_head trans_list;
1492 : struct list_head dead_roots;
1493 : struct list_head caching_block_groups;
1494 :
1495 : spinlock_t delayed_iput_lock;
1496 : struct list_head delayed_iputs;
1497 :
1498 : /* this protects tree_mod_seq_list */
1499 : spinlock_t tree_mod_seq_lock;
1500 : atomic64_t tree_mod_seq;
1501 : struct list_head tree_mod_seq_list;
1502 :
1503 : /* this protects tree_mod_log */
1504 : rwlock_t tree_mod_log_lock;
1505 : struct rb_root tree_mod_log;
1506 :
1507 : atomic_t nr_async_submits;
1508 : atomic_t async_submit_draining;
1509 : atomic_t nr_async_bios;
1510 : atomic_t async_delalloc_pages;
1511 : atomic_t open_ioctl_trans;
1512 :
1513 : /*
1514 : * this is used to protect the following list -- ordered_roots.
1515 : */
1516 : spinlock_t ordered_root_lock;
1517 :
1518 : /*
1519 : * all fs/file tree roots in which there are data=ordered extents
1520 : * pending writeback are added into this list.
1521 : *
1522 : * these can span multiple transactions and basically include
1523 : * every dirty data page that isn't from nodatacow
1524 : */
1525 : struct list_head ordered_roots;
1526 :
1527 : struct mutex delalloc_root_mutex;
1528 : spinlock_t delalloc_root_lock;
1529 : /* all fs/file tree roots that have delalloc inodes. */
1530 : struct list_head delalloc_roots;
1531 :
1532 : /*
1533 : * there is a pool of worker threads for checksumming during writes
1534 : * and a pool for checksumming after reads. This is because readers
1535 : * can run with FS locks held, and the writers may be waiting for
1536 : * those locks. We don't want ordering in the pending list to cause
1537 : * deadlocks, and so the two are serviced separately.
1538 : *
1539 : * A third pool does submit_bio to avoid deadlocking with the other
1540 : * two
1541 : */
1542 : struct btrfs_workqueue *workers;
1543 : struct btrfs_workqueue *delalloc_workers;
1544 : struct btrfs_workqueue *flush_workers;
1545 : struct btrfs_workqueue *endio_workers;
1546 : struct btrfs_workqueue *endio_meta_workers;
1547 : struct btrfs_workqueue *endio_raid56_workers;
1548 : struct btrfs_workqueue *rmw_workers;
1549 : struct btrfs_workqueue *endio_meta_write_workers;
1550 : struct btrfs_workqueue *endio_write_workers;
1551 : struct btrfs_workqueue *endio_freespace_worker;
1552 : struct btrfs_workqueue *submit_workers;
1553 : struct btrfs_workqueue *caching_workers;
1554 : struct btrfs_workqueue *readahead_workers;
1555 :
1556 : /*
1557 : * fixup workers take dirty pages that didn't properly go through
1558 : * the cow mechanism and make them safe to write. It happens
1559 : * for the sys_munmap function call path
1560 : */
1561 : struct btrfs_workqueue *fixup_workers;
1562 : struct btrfs_workqueue *delayed_workers;
1563 :
1564 : /* the extent workers do delayed refs on the extent allocation tree */
1565 : struct btrfs_workqueue *extent_workers;
1566 : struct task_struct *transaction_kthread;
1567 : struct task_struct *cleaner_kthread;
1568 : int thread_pool_size;
1569 :
1570 : struct kobject super_kobj;
1571 : struct kobject *space_info_kobj;
1572 : struct kobject *device_dir_kobj;
1573 : struct completion kobj_unregister;
1574 : int do_barriers;
1575 : int closing;
1576 : int log_root_recovering;
1577 :
1578 : u64 total_pinned;
1579 :
1580 : /* used to keep from writing metadata until there is a nice batch */
1581 : struct percpu_counter dirty_metadata_bytes;
1582 : struct percpu_counter delalloc_bytes;
1583 : s32 dirty_metadata_batch;
1584 : s32 delalloc_batch;
1585 :
1586 : struct list_head dirty_cowonly_roots;
1587 :
1588 : struct btrfs_fs_devices *fs_devices;
1589 :
1590 : /*
1591 : * the space_info list is almost entirely read only. It only changes
1592 : * when we add a new raid type to the FS, and that happens
1593 : * very rarely. RCU is used to protect it.
1594 : */
1595 : struct list_head space_info;
1596 :
1597 : struct btrfs_space_info *data_sinfo;
1598 :
1599 : struct reloc_control *reloc_ctl;
1600 :
1601 : /* data_alloc_cluster is only used in ssd mode */
1602 : struct btrfs_free_cluster data_alloc_cluster;
1603 :
1604 : /* all metadata allocations go through this cluster */
1605 : struct btrfs_free_cluster meta_alloc_cluster;
1606 :
1607 : /* auto defrag inodes go here */
1608 : spinlock_t defrag_inodes_lock;
1609 : struct rb_root defrag_inodes;
1610 : atomic_t defrag_running;
1611 :
1612 : /* Used to protect avail_{data, metadata, system}_alloc_bits */
1613 : seqlock_t profiles_lock;
1614 : /*
1615 : * these three are in extended format (availability of single
1616 : * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1617 : * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1618 : */
1619 : u64 avail_data_alloc_bits;
1620 : u64 avail_metadata_alloc_bits;
1621 : u64 avail_system_alloc_bits;
1622 :
1623 : /* restriper state */
1624 : spinlock_t balance_lock;
1625 : struct mutex balance_mutex;
1626 : atomic_t balance_running;
1627 : atomic_t balance_pause_req;
1628 : atomic_t balance_cancel_req;
1629 : struct btrfs_balance_control *balance_ctl;
1630 : wait_queue_head_t balance_wait_q;
1631 :
1632 : unsigned data_chunk_allocations;
1633 : unsigned metadata_ratio;
1634 :
1635 : void *bdev_holder;
1636 :
1637 : /* private scrub information */
1638 : struct mutex scrub_lock;
1639 : atomic_t scrubs_running;
1640 : atomic_t scrub_pause_req;
1641 : atomic_t scrubs_paused;
1642 : atomic_t scrub_cancel_req;
1643 : wait_queue_head_t scrub_pause_wait;
1644 : int scrub_workers_refcnt;
1645 : struct btrfs_workqueue *scrub_workers;
1646 : struct btrfs_workqueue *scrub_wr_completion_workers;
1647 : struct btrfs_workqueue *scrub_nocow_workers;
1648 :
1649 : #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1650 : u32 check_integrity_print_mask;
1651 : #endif
1652 : /*
1653 : * quota information
1654 : */
1655 : unsigned int quota_enabled:1;
1656 :
1657 : /*
1658 : * quota_enabled only changes state after a commit. This holds the
1659 : * next state.
1660 : */
1661 : unsigned int pending_quota_state:1;
1662 :
1663 : /* is qgroup tracking in a consistent state? */
1664 : u64 qgroup_flags;
1665 :
1666 : /* holds configuration and tracking. Protected by qgroup_lock */
1667 : struct rb_root qgroup_tree;
1668 : struct rb_root qgroup_op_tree;
1669 : spinlock_t qgroup_lock;
1670 : spinlock_t qgroup_op_lock;
1671 : atomic_t qgroup_op_seq;
1672 :
1673 : /*
1674 : * used to avoid frequently calling ulist_alloc()/ulist_free()
1675 : * when doing qgroup accounting, it must be protected by qgroup_lock.
1676 : */
1677 : struct ulist *qgroup_ulist;
1678 :
1679 : /* protect user change for quota operations */
1680 : struct mutex qgroup_ioctl_lock;
1681 :
1682 : /* list of dirty qgroups to be written at next commit */
1683 : struct list_head dirty_qgroups;
1684 :
1685 : /* used by btrfs_qgroup_record_ref for an efficient tree traversal */
1686 : u64 qgroup_seq;
1687 :
1688 : /* qgroup rescan items */
1689 : struct mutex qgroup_rescan_lock; /* protects the progress item */
1690 : struct btrfs_key qgroup_rescan_progress;
1691 : struct btrfs_workqueue *qgroup_rescan_workers;
1692 : struct completion qgroup_rescan_completion;
1693 : struct btrfs_work qgroup_rescan_work;
1694 :
1695 : /* filesystem state */
1696 : unsigned long fs_state;
1697 :
1698 : struct btrfs_delayed_root *delayed_root;
1699 :
1700 : /* readahead tree */
1701 : spinlock_t reada_lock;
1702 : struct radix_tree_root reada_tree;
1703 :
1704 : /* Extent buffer radix tree */
1705 : spinlock_t buffer_lock;
1706 : struct radix_tree_root buffer_radix;
1707 :
1708 : /* next backup root to be overwritten */
1709 : int backup_root_index;
1710 :
1711 : int num_tolerated_disk_barrier_failures;
1712 :
1713 : /* device replace state */
1714 : struct btrfs_dev_replace dev_replace;
1715 :
1716 : atomic_t mutually_exclusive_operation_running;
1717 :
1718 : struct percpu_counter bio_counter;
1719 : wait_queue_head_t replace_wait;
1720 :
1721 : struct semaphore uuid_tree_rescan_sem;
1722 : unsigned int update_uuid_tree_gen:1;
1723 :
1724 : /* Used to reclaim the metadata space in the background. */
1725 : struct work_struct async_reclaim_work;
1726 : };
1727 :
1728 : struct btrfs_subvolume_writers {
1729 : struct percpu_counter counter;
1730 : wait_queue_head_t wait;
1731 : };
1732 :
1733 : /*
1734 : * The state of btrfs root
1735 : */
1736 : /*
1737 : * btrfs_record_root_in_trans is a multi-step process,
1738 : * and it can race with the balancing code. But the
1739 : * race is very small, and only the first time the root
1740 : * is added to each transaction. So IN_TRANS_SETUP
1741 : * is used to tell us when more checks are required
1742 : */
1743 : #define BTRFS_ROOT_IN_TRANS_SETUP 0
1744 : #define BTRFS_ROOT_REF_COWS 1
1745 : #define BTRFS_ROOT_TRACK_DIRTY 2
1746 : #define BTRFS_ROOT_IN_RADIX 3
1747 : #define BTRFS_ROOT_DUMMY_ROOT 4
1748 : #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1749 : #define BTRFS_ROOT_DEFRAG_RUNNING 6
1750 : #define BTRFS_ROOT_FORCE_COW 7
1751 : #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1752 :
1753 : /*
1754 : * in ram representation of the tree. extent_root is used for all allocations
1755 : * and for the extent tree extent_root root.
1756 : */
1757 : struct btrfs_root {
1758 : struct extent_buffer *node;
1759 :
1760 : struct extent_buffer *commit_root;
1761 : struct btrfs_root *log_root;
1762 : struct btrfs_root *reloc_root;
1763 :
1764 : unsigned long state;
1765 : struct btrfs_root_item root_item;
1766 : struct btrfs_key root_key;
1767 : struct btrfs_fs_info *fs_info;
1768 : struct extent_io_tree dirty_log_pages;
1769 :
1770 : struct kobject root_kobj;
1771 : struct completion kobj_unregister;
1772 : struct mutex objectid_mutex;
1773 :
1774 : spinlock_t accounting_lock;
1775 : struct btrfs_block_rsv *block_rsv;
1776 :
1777 : /* free ino cache stuff */
1778 : struct btrfs_free_space_ctl *free_ino_ctl;
1779 : enum btrfs_caching_type cached;
1780 : spinlock_t cache_lock;
1781 : wait_queue_head_t cache_wait;
1782 : struct btrfs_free_space_ctl *free_ino_pinned;
1783 : u64 cache_progress;
1784 : struct inode *cache_inode;
1785 :
1786 : struct mutex log_mutex;
1787 : wait_queue_head_t log_writer_wait;
1788 : wait_queue_head_t log_commit_wait[2];
1789 : struct list_head log_ctxs[2];
1790 : atomic_t log_writers;
1791 : atomic_t log_commit[2];
1792 : atomic_t log_batch;
1793 : int log_transid;
1794 : /* No matter the commit succeeds or not*/
1795 : int log_transid_committed;
1796 : /* Just be updated when the commit succeeds. */
1797 : int last_log_commit;
1798 : pid_t log_start_pid;
1799 :
1800 : u64 objectid;
1801 : u64 last_trans;
1802 :
1803 : /* data allocations are done in sectorsize units */
1804 : u32 sectorsize;
1805 :
1806 : /* node allocations are done in nodesize units */
1807 : u32 nodesize;
1808 :
1809 : /* leaf allocations are done in leafsize units */
1810 : u32 leafsize;
1811 :
1812 : u32 stripesize;
1813 :
1814 : u32 type;
1815 :
1816 : u64 highest_objectid;
1817 :
1818 : #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1819 : u64 alloc_bytenr;
1820 : #endif
1821 :
1822 : u64 defrag_trans_start;
1823 : struct btrfs_key defrag_progress;
1824 : struct btrfs_key defrag_max;
1825 : char *name;
1826 :
1827 : /* the dirty list is only used by non-reference counted roots */
1828 : struct list_head dirty_list;
1829 :
1830 : struct list_head root_list;
1831 :
1832 : spinlock_t log_extents_lock[2];
1833 : struct list_head logged_list[2];
1834 :
1835 : spinlock_t orphan_lock;
1836 : atomic_t orphan_inodes;
1837 : struct btrfs_block_rsv *orphan_block_rsv;
1838 : int orphan_cleanup_state;
1839 :
1840 : spinlock_t inode_lock;
1841 : /* red-black tree that keeps track of in-memory inodes */
1842 : struct rb_root inode_tree;
1843 :
1844 : /*
1845 : * radix tree that keeps track of delayed nodes of every inode,
1846 : * protected by inode_lock
1847 : */
1848 : struct radix_tree_root delayed_nodes_tree;
1849 : /*
1850 : * right now this just gets used so that a root has its own devid
1851 : * for stat. It may be used for more later
1852 : */
1853 : dev_t anon_dev;
1854 :
1855 : spinlock_t root_item_lock;
1856 : atomic_t refs;
1857 :
1858 : struct mutex delalloc_mutex;
1859 : spinlock_t delalloc_lock;
1860 : /*
1861 : * all of the inodes that have delalloc bytes. It is possible for
1862 : * this list to be empty even when there is still dirty data=ordered
1863 : * extents waiting to finish IO.
1864 : */
1865 : struct list_head delalloc_inodes;
1866 : struct list_head delalloc_root;
1867 : u64 nr_delalloc_inodes;
1868 :
1869 : struct mutex ordered_extent_mutex;
1870 : /*
1871 : * this is used by the balancing code to wait for all the pending
1872 : * ordered extents
1873 : */
1874 : spinlock_t ordered_extent_lock;
1875 :
1876 : /*
1877 : * all of the data=ordered extents pending writeback
1878 : * these can span multiple transactions and basically include
1879 : * every dirty data page that isn't from nodatacow
1880 : */
1881 : struct list_head ordered_extents;
1882 : struct list_head ordered_root;
1883 : u64 nr_ordered_extents;
1884 :
1885 : /*
1886 : * Number of currently running SEND ioctls to prevent
1887 : * manipulation with the read-only status via SUBVOL_SETFLAGS
1888 : */
1889 : int send_in_progress;
1890 : struct btrfs_subvolume_writers *subv_writers;
1891 : atomic_t will_be_snapshoted;
1892 : };
1893 :
1894 : struct btrfs_ioctl_defrag_range_args {
1895 : /* start of the defrag operation */
1896 : __u64 start;
1897 :
1898 : /* number of bytes to defrag, use (u64)-1 to say all */
1899 : __u64 len;
1900 :
1901 : /*
1902 : * flags for the operation, which can include turning
1903 : * on compression for this one defrag
1904 : */
1905 : __u64 flags;
1906 :
1907 : /*
1908 : * any extent bigger than this will be considered
1909 : * already defragged. Use 0 to take the kernel default
1910 : * Use 1 to say every single extent must be rewritten
1911 : */
1912 : __u32 extent_thresh;
1913 :
1914 : /*
1915 : * which compression method to use if turning on compression
1916 : * for this defrag operation. If unspecified, zlib will
1917 : * be used
1918 : */
1919 : __u32 compress_type;
1920 :
1921 : /* spare for later */
1922 : __u32 unused[4];
1923 : };
1924 :
1925 :
1926 : /*
1927 : * inode items have the data typically returned from stat and store other
1928 : * info about object characteristics. There is one for every file and dir in
1929 : * the FS
1930 : */
1931 : #define BTRFS_INODE_ITEM_KEY 1
1932 : #define BTRFS_INODE_REF_KEY 12
1933 : #define BTRFS_INODE_EXTREF_KEY 13
1934 : #define BTRFS_XATTR_ITEM_KEY 24
1935 : #define BTRFS_ORPHAN_ITEM_KEY 48
1936 : /* reserve 2-15 close to the inode for later flexibility */
1937 :
1938 : /*
1939 : * dir items are the name -> inode pointers in a directory. There is one
1940 : * for every name in a directory.
1941 : */
1942 : #define BTRFS_DIR_LOG_ITEM_KEY 60
1943 : #define BTRFS_DIR_LOG_INDEX_KEY 72
1944 : #define BTRFS_DIR_ITEM_KEY 84
1945 : #define BTRFS_DIR_INDEX_KEY 96
1946 : /*
1947 : * extent data is for file data
1948 : */
1949 : #define BTRFS_EXTENT_DATA_KEY 108
1950 :
1951 : /*
1952 : * extent csums are stored in a separate tree and hold csums for
1953 : * an entire extent on disk.
1954 : */
1955 : #define BTRFS_EXTENT_CSUM_KEY 128
1956 :
1957 : /*
1958 : * root items point to tree roots. They are typically in the root
1959 : * tree used by the super block to find all the other trees
1960 : */
1961 : #define BTRFS_ROOT_ITEM_KEY 132
1962 :
1963 : /*
1964 : * root backrefs tie subvols and snapshots to the directory entries that
1965 : * reference them
1966 : */
1967 : #define BTRFS_ROOT_BACKREF_KEY 144
1968 :
1969 : /*
1970 : * root refs make a fast index for listing all of the snapshots and
1971 : * subvolumes referenced by a given root. They point directly to the
1972 : * directory item in the root that references the subvol
1973 : */
1974 : #define BTRFS_ROOT_REF_KEY 156
1975 :
1976 : /*
1977 : * extent items are in the extent map tree. These record which blocks
1978 : * are used, and how many references there are to each block
1979 : */
1980 : #define BTRFS_EXTENT_ITEM_KEY 168
1981 :
1982 : /*
1983 : * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1984 : * the length, so we save the level in key->offset instead of the length.
1985 : */
1986 : #define BTRFS_METADATA_ITEM_KEY 169
1987 :
1988 : #define BTRFS_TREE_BLOCK_REF_KEY 176
1989 :
1990 : #define BTRFS_EXTENT_DATA_REF_KEY 178
1991 :
1992 : #define BTRFS_EXTENT_REF_V0_KEY 180
1993 :
1994 : #define BTRFS_SHARED_BLOCK_REF_KEY 182
1995 :
1996 : #define BTRFS_SHARED_DATA_REF_KEY 184
1997 :
1998 : /*
1999 : * block groups give us hints into the extent allocation trees. Which
2000 : * blocks are free etc etc
2001 : */
2002 : #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2003 :
2004 : #define BTRFS_DEV_EXTENT_KEY 204
2005 : #define BTRFS_DEV_ITEM_KEY 216
2006 : #define BTRFS_CHUNK_ITEM_KEY 228
2007 :
2008 : /*
2009 : * Records the overall state of the qgroups.
2010 : * There's only one instance of this key present,
2011 : * (0, BTRFS_QGROUP_STATUS_KEY, 0)
2012 : */
2013 : #define BTRFS_QGROUP_STATUS_KEY 240
2014 : /*
2015 : * Records the currently used space of the qgroup.
2016 : * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
2017 : */
2018 : #define BTRFS_QGROUP_INFO_KEY 242
2019 : /*
2020 : * Contains the user configured limits for the qgroup.
2021 : * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
2022 : */
2023 : #define BTRFS_QGROUP_LIMIT_KEY 244
2024 : /*
2025 : * Records the child-parent relationship of qgroups. For
2026 : * each relation, 2 keys are present:
2027 : * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
2028 : * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
2029 : */
2030 : #define BTRFS_QGROUP_RELATION_KEY 246
2031 :
2032 : #define BTRFS_BALANCE_ITEM_KEY 248
2033 :
2034 : /*
2035 : * Persistantly stores the io stats in the device tree.
2036 : * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
2037 : */
2038 : #define BTRFS_DEV_STATS_KEY 249
2039 :
2040 : /*
2041 : * Persistantly stores the device replace state in the device tree.
2042 : * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
2043 : */
2044 : #define BTRFS_DEV_REPLACE_KEY 250
2045 :
2046 : /*
2047 : * Stores items that allow to quickly map UUIDs to something else.
2048 : * These items are part of the filesystem UUID tree.
2049 : * The key is built like this:
2050 : * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
2051 : */
2052 : #if BTRFS_UUID_SIZE != 16
2053 : #error "UUID items require BTRFS_UUID_SIZE == 16!"
2054 : #endif
2055 : #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
2056 : #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
2057 : * received subvols */
2058 :
2059 : /*
2060 : * string items are for debugging. They just store a short string of
2061 : * data in the FS
2062 : */
2063 : #define BTRFS_STRING_ITEM_KEY 253
2064 :
2065 : /*
2066 : * Flags for mount options.
2067 : *
2068 : * Note: don't forget to add new options to btrfs_show_options()
2069 : */
2070 : #define BTRFS_MOUNT_NODATASUM (1 << 0)
2071 : #define BTRFS_MOUNT_NODATACOW (1 << 1)
2072 : #define BTRFS_MOUNT_NOBARRIER (1 << 2)
2073 : #define BTRFS_MOUNT_SSD (1 << 3)
2074 : #define BTRFS_MOUNT_DEGRADED (1 << 4)
2075 : #define BTRFS_MOUNT_COMPRESS (1 << 5)
2076 : #define BTRFS_MOUNT_NOTREELOG (1 << 6)
2077 : #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
2078 : #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
2079 : #define BTRFS_MOUNT_NOSSD (1 << 9)
2080 : #define BTRFS_MOUNT_DISCARD (1 << 10)
2081 : #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
2082 : #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
2083 : #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
2084 : #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2085 : #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
2086 : #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
2087 : #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
2088 : #define BTRFS_MOUNT_RECOVERY (1 << 18)
2089 : #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
2090 : #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
2091 : #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
2092 : #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
2093 : #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
2094 : #define BTRFS_MOUNT_CHANGE_INODE_CACHE (1 << 24)
2095 :
2096 : #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
2097 :
2098 : #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
2099 : #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
2100 : #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
2101 : #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
2102 : BTRFS_MOUNT_##opt)
2103 : #define btrfs_set_and_info(root, opt, fmt, args...) \
2104 : { \
2105 : if (!btrfs_test_opt(root, opt)) \
2106 : btrfs_info(root->fs_info, fmt, ##args); \
2107 : btrfs_set_opt(root->fs_info->mount_opt, opt); \
2108 : }
2109 :
2110 : #define btrfs_clear_and_info(root, opt, fmt, args...) \
2111 : { \
2112 : if (btrfs_test_opt(root, opt)) \
2113 : btrfs_info(root->fs_info, fmt, ##args); \
2114 : btrfs_clear_opt(root->fs_info->mount_opt, opt); \
2115 : }
2116 :
2117 : /*
2118 : * Inode flags
2119 : */
2120 : #define BTRFS_INODE_NODATASUM (1 << 0)
2121 : #define BTRFS_INODE_NODATACOW (1 << 1)
2122 : #define BTRFS_INODE_READONLY (1 << 2)
2123 : #define BTRFS_INODE_NOCOMPRESS (1 << 3)
2124 : #define BTRFS_INODE_PREALLOC (1 << 4)
2125 : #define BTRFS_INODE_SYNC (1 << 5)
2126 : #define BTRFS_INODE_IMMUTABLE (1 << 6)
2127 : #define BTRFS_INODE_APPEND (1 << 7)
2128 : #define BTRFS_INODE_NODUMP (1 << 8)
2129 : #define BTRFS_INODE_NOATIME (1 << 9)
2130 : #define BTRFS_INODE_DIRSYNC (1 << 10)
2131 : #define BTRFS_INODE_COMPRESS (1 << 11)
2132 :
2133 : #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
2134 :
2135 : struct btrfs_map_token {
2136 : struct extent_buffer *eb;
2137 : char *kaddr;
2138 : unsigned long offset;
2139 : };
2140 :
2141 : static inline void btrfs_init_map_token (struct btrfs_map_token *token)
2142 : {
2143 2041195 : token->kaddr = NULL;
2144 : }
2145 :
2146 : /* some macros to generate set/get funcs for the struct fields. This
2147 : * assumes there is a lefoo_to_cpu for every type, so lets make a simple
2148 : * one for u8:
2149 : */
2150 : #define le8_to_cpu(v) (v)
2151 : #define cpu_to_le8(v) (v)
2152 : #define __le8 u8
2153 :
2154 : #define read_eb_member(eb, ptr, type, member, result) ( \
2155 : read_extent_buffer(eb, (char *)(result), \
2156 : ((unsigned long)(ptr)) + \
2157 : offsetof(type, member), \
2158 : sizeof(((type *)0)->member)))
2159 :
2160 : #define write_eb_member(eb, ptr, type, member, result) ( \
2161 : write_extent_buffer(eb, (char *)(result), \
2162 : ((unsigned long)(ptr)) + \
2163 : offsetof(type, member), \
2164 : sizeof(((type *)0)->member)))
2165 :
2166 : #define DECLARE_BTRFS_SETGET_BITS(bits) \
2167 : u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
2168 : unsigned long off, \
2169 : struct btrfs_map_token *token); \
2170 : void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
2171 : unsigned long off, u##bits val, \
2172 : struct btrfs_map_token *token); \
2173 : static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
2174 : unsigned long off) \
2175 : { \
2176 : return btrfs_get_token_##bits(eb, ptr, off, NULL); \
2177 : } \
2178 : static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
2179 : unsigned long off, u##bits val) \
2180 : { \
2181 : btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
2182 : }
2183 :
2184 3955038 : DECLARE_BTRFS_SETGET_BITS(8)
2185 1455139 : DECLARE_BTRFS_SETGET_BITS(16)
2186 11718167 : DECLARE_BTRFS_SETGET_BITS(32)
2187 12594315 : DECLARE_BTRFS_SETGET_BITS(64)
2188 :
2189 : #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
2190 : static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
2191 : { \
2192 : BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2193 : return btrfs_get_##bits(eb, s, offsetof(type, member)); \
2194 : } \
2195 : static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
2196 : u##bits val) \
2197 : { \
2198 : BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2199 : btrfs_set_##bits(eb, s, offsetof(type, member), val); \
2200 : } \
2201 : static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
2202 : struct btrfs_map_token *token) \
2203 : { \
2204 : BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2205 : return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
2206 : } \
2207 : static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
2208 : type *s, u##bits val, \
2209 : struct btrfs_map_token *token) \
2210 : { \
2211 : BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
2212 : btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
2213 : }
2214 :
2215 : #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
2216 : static inline u##bits btrfs_##name(struct extent_buffer *eb) \
2217 : { \
2218 : type *p = page_address(eb->pages[0]); \
2219 : u##bits res = le##bits##_to_cpu(p->member); \
2220 : return res; \
2221 : } \
2222 : static inline void btrfs_set_##name(struct extent_buffer *eb, \
2223 : u##bits val) \
2224 : { \
2225 : type *p = page_address(eb->pages[0]); \
2226 : p->member = cpu_to_le##bits(val); \
2227 : }
2228 :
2229 : #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
2230 : static inline u##bits btrfs_##name(type *s) \
2231 : { \
2232 : return le##bits##_to_cpu(s->member); \
2233 : } \
2234 : static inline void btrfs_set_##name(type *s, u##bits val) \
2235 : { \
2236 : s->member = cpu_to_le##bits(val); \
2237 : }
2238 :
2239 : BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
2240 : BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
2241 : BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
2242 : BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
2243 : BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2244 : BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
2245 : start_offset, 64);
2246 : BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
2247 : BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2248 : BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
2249 : BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
2250 : BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
2251 : BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2252 :
2253 3656 : BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
2254 3656 : BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
2255 : total_bytes, 64);
2256 3656 : BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
2257 : bytes_used, 64);
2258 3656 : BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
2259 : io_align, 32);
2260 3656 : BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
2261 : io_width, 32);
2262 3656 : BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
2263 : sector_size, 32);
2264 4525 : BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2265 : BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
2266 : dev_group, 32);
2267 : BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
2268 : seek_speed, 8);
2269 : BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
2270 : bandwidth, 8);
2271 3656 : BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
2272 : generation, 64);
2273 :
2274 : static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2275 : {
2276 496 : return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2277 : }
2278 :
2279 : static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
2280 : {
2281 248 : return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
2282 : }
2283 :
2284 : BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2285 : BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
2286 : BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
2287 : BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
2288 : BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
2289 : BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
2290 : BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
2291 : BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
2292 : BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2293 : BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
2294 : BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
2295 :
2296 : static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
2297 : {
2298 : return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
2299 : }
2300 :
2301 87 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
2302 87 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
2303 87 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
2304 : stripe_len, 64);
2305 87 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
2306 : io_align, 32);
2307 87 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
2308 : io_width, 32);
2309 87 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
2310 : sector_size, 32);
2311 87 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
2312 140 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
2313 : num_stripes, 16);
2314 87 : BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
2315 : sub_stripes, 16);
2316 133 : BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
2317 133 : BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
2318 :
2319 : static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
2320 : int nr)
2321 : {
2322 1616 : unsigned long offset = (unsigned long)c;
2323 1616 : offset += offsetof(struct btrfs_chunk, stripe);
2324 1616 : offset += nr * sizeof(struct btrfs_stripe);
2325 1616 : return (struct btrfs_stripe *)offset;
2326 : }
2327 :
2328 : static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
2329 : {
2330 : return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
2331 : }
2332 :
2333 : static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
2334 : struct btrfs_chunk *c, int nr)
2335 : {
2336 : return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
2337 : }
2338 :
2339 : static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
2340 : struct btrfs_chunk *c, int nr)
2341 : {
2342 : return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
2343 : }
2344 :
2345 : /* struct btrfs_block_group_item */
2346 345289 : BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
2347 : used, 64);
2348 : BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
2349 : used, 64);
2350 87 : BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
2351 : struct btrfs_block_group_item, chunk_objectid, 64);
2352 :
2353 : BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2354 : struct btrfs_block_group_item, chunk_objectid, 64);
2355 : BTRFS_SETGET_FUNCS(disk_block_group_flags,
2356 : struct btrfs_block_group_item, flags, 64);
2357 1228 : BTRFS_SETGET_STACK_FUNCS(block_group_flags,
2358 : struct btrfs_block_group_item, flags, 64);
2359 :
2360 : /* struct btrfs_inode_ref */
2361 : BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2362 : BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2363 :
2364 : /* struct btrfs_inode_extref */
2365 : BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
2366 : parent_objectid, 64);
2367 : BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
2368 : name_len, 16);
2369 : BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
2370 :
2371 : /* struct btrfs_inode_item */
2372 44218 : BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2373 44218 : BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2374 44218 : BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2375 44218 : BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2376 44218 : BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2377 44218 : BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
2378 44218 : BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
2379 44217 : BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
2380 44218 : BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
2381 44218 : BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
2382 44218 : BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2383 44218 : BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2384 150477 : BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
2385 : generation, 64);
2386 150203 : BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
2387 : sequence, 64);
2388 150203 : BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
2389 : transid, 64);
2390 150470 : BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
2391 150477 : BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
2392 : nbytes, 64);
2393 150203 : BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
2394 : block_group, 64);
2395 150470 : BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
2396 150202 : BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
2397 150196 : BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
2398 150470 : BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
2399 150203 : BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
2400 151816 : BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2401 :
2402 : static inline struct btrfs_timespec *
2403 : btrfs_inode_atime(struct btrfs_inode_item *inode_item)
2404 : {
2405 194421 : unsigned long ptr = (unsigned long)inode_item;
2406 200133 : ptr += offsetof(struct btrfs_inode_item, atime);
2407 200133 : return (struct btrfs_timespec *)ptr;
2408 : }
2409 :
2410 : static inline struct btrfs_timespec *
2411 : btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
2412 : {
2413 : unsigned long ptr = (unsigned long)inode_item;
2414 200133 : ptr += offsetof(struct btrfs_inode_item, mtime);
2415 200133 : return (struct btrfs_timespec *)ptr;
2416 : }
2417 :
2418 : static inline struct btrfs_timespec *
2419 : btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
2420 : {
2421 : unsigned long ptr = (unsigned long)inode_item;
2422 200133 : ptr += offsetof(struct btrfs_inode_item, ctime);
2423 200133 : return (struct btrfs_timespec *)ptr;
2424 : }
2425 :
2426 132654 : BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
2427 132654 : BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2428 621552 : BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
2429 621552 : BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
2430 :
2431 : /* struct btrfs_dev_extent */
2432 : BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
2433 : chunk_tree, 64);
2434 : BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
2435 : chunk_objectid, 64);
2436 : BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
2437 : chunk_offset, 64);
2438 : BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
2439 :
2440 : static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2441 : {
2442 : unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2443 133 : return (unsigned long)dev + ptr;
2444 : }
2445 :
2446 : BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
2447 : BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
2448 : generation, 64);
2449 : BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
2450 :
2451 : BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
2452 :
2453 :
2454 : BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
2455 :
2456 : static inline void btrfs_tree_block_key(struct extent_buffer *eb,
2457 : struct btrfs_tree_block_info *item,
2458 : struct btrfs_disk_key *key)
2459 : {
2460 0 : read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2461 : }
2462 :
2463 : static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
2464 : struct btrfs_tree_block_info *item,
2465 : struct btrfs_disk_key *key)
2466 : {
2467 53373 : write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
2468 : }
2469 :
2470 : BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
2471 : root, 64);
2472 : BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
2473 : objectid, 64);
2474 : BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
2475 : offset, 64);
2476 : BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
2477 : count, 32);
2478 :
2479 : BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
2480 : count, 32);
2481 :
2482 : BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
2483 : type, 8);
2484 : BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
2485 : offset, 64);
2486 :
2487 1310495 : static inline u32 btrfs_extent_inline_ref_size(int type)
2488 : {
2489 2620990 : if (type == BTRFS_TREE_BLOCK_REF_KEY ||
2490 1310495 : type == BTRFS_SHARED_BLOCK_REF_KEY)
2491 : return sizeof(struct btrfs_extent_inline_ref);
2492 140728 : if (type == BTRFS_SHARED_DATA_REF_KEY)
2493 : return sizeof(struct btrfs_shared_data_ref) +
2494 : sizeof(struct btrfs_extent_inline_ref);
2495 106017 : if (type == BTRFS_EXTENT_DATA_REF_KEY)
2496 : return sizeof(struct btrfs_extent_data_ref) +
2497 : offsetof(struct btrfs_extent_inline_ref, offset);
2498 0 : BUG();
2499 : return 0;
2500 : }
2501 :
2502 : BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
2503 : BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
2504 : generation, 64);
2505 : BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
2506 : BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
2507 :
2508 : /* struct btrfs_node */
2509 : BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2510 : BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2511 : BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
2512 : blockptr, 64);
2513 : BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
2514 : generation, 64);
2515 :
2516 : static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
2517 : {
2518 : unsigned long ptr;
2519 2764076 : ptr = offsetof(struct btrfs_node, ptrs) +
2520 2764076 : sizeof(struct btrfs_key_ptr) * nr;
2521 2764076 : return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
2522 : }
2523 :
2524 : static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
2525 : int nr, u64 val)
2526 : {
2527 : unsigned long ptr;
2528 39024 : ptr = offsetof(struct btrfs_node, ptrs) +
2529 39024 : sizeof(struct btrfs_key_ptr) * nr;
2530 44336 : btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
2531 : }
2532 :
2533 : static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
2534 : {
2535 : unsigned long ptr;
2536 25990 : ptr = offsetof(struct btrfs_node, ptrs) +
2537 25990 : sizeof(struct btrfs_key_ptr) * nr;
2538 25990 : return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
2539 : }
2540 :
2541 : static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
2542 : int nr, u64 val)
2543 : {
2544 : unsigned long ptr;
2545 267 : ptr = offsetof(struct btrfs_node, ptrs) +
2546 267 : sizeof(struct btrfs_key_ptr) * nr;
2547 267 : btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
2548 : }
2549 :
2550 : static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2551 : {
2552 1280338 : return offsetof(struct btrfs_node, ptrs) +
2553 1280241 : sizeof(struct btrfs_key_ptr) * nr;
2554 : }
2555 :
2556 : void btrfs_node_key(struct extent_buffer *eb,
2557 : struct btrfs_disk_key *disk_key, int nr);
2558 :
2559 : static inline void btrfs_set_node_key(struct extent_buffer *eb,
2560 : struct btrfs_disk_key *disk_key, int nr)
2561 : {
2562 : unsigned long ptr;
2563 : ptr = btrfs_node_key_ptr_offset(nr);
2564 23819 : write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
2565 : struct btrfs_key_ptr, key, disk_key);
2566 : }
2567 :
2568 : /* struct btrfs_item */
2569 43578574 : BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
2570 2503431 : BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2571 : BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
2572 : BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2573 :
2574 : static inline unsigned long btrfs_item_nr_offset(int nr)
2575 : {
2576 44486686 : return offsetof(struct btrfs_leaf, items) +
2577 44482503 : sizeof(struct btrfs_item) * nr;
2578 : }
2579 :
2580 : static inline struct btrfs_item *btrfs_item_nr(int nr)
2581 : {
2582 34181258 : return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2583 : }
2584 :
2585 383649 : static inline u32 btrfs_item_end(struct extent_buffer *eb,
2586 : struct btrfs_item *item)
2587 : {
2588 383549 : return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2589 : }
2590 :
2591 : static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
2592 : {
2593 383986 : return btrfs_item_end(eb, btrfs_item_nr(nr));
2594 : }
2595 :
2596 : static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
2597 : {
2598 : return btrfs_item_offset(eb, btrfs_item_nr(nr));
2599 : }
2600 :
2601 : static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
2602 : {
2603 : return btrfs_item_size(eb, btrfs_item_nr(nr));
2604 : }
2605 :
2606 : static inline void btrfs_item_key(struct extent_buffer *eb,
2607 : struct btrfs_disk_key *disk_key, int nr)
2608 : {
2609 : struct btrfs_item *item = btrfs_item_nr(nr);
2610 9944023 : read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2611 : }
2612 :
2613 : static inline void btrfs_set_item_key(struct extent_buffer *eb,
2614 : struct btrfs_disk_key *disk_key, int nr)
2615 : {
2616 : struct btrfs_item *item = btrfs_item_nr(nr);
2617 325516 : write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2618 : }
2619 :
2620 : BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2621 :
2622 : /*
2623 : * struct btrfs_root_ref
2624 : */
2625 : BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2626 : BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2627 : BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2628 :
2629 : /* struct btrfs_dir_item */
2630 : BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2631 : BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2632 : BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2633 : BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2634 26500 : BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2635 26500 : BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2636 : data_len, 16);
2637 27053 : BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2638 : name_len, 16);
2639 26500 : BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2640 : transid, 64);
2641 :
2642 : static inline void btrfs_dir_item_key(struct extent_buffer *eb,
2643 : struct btrfs_dir_item *item,
2644 : struct btrfs_disk_key *key)
2645 : {
2646 171483 : read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2647 : }
2648 :
2649 : static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2650 : struct btrfs_dir_item *item,
2651 : struct btrfs_disk_key *key)
2652 : {
2653 26837 : write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2654 : }
2655 :
2656 : BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2657 : num_entries, 64);
2658 : BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2659 : num_bitmaps, 64);
2660 : BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2661 : generation, 64);
2662 :
2663 : static inline void btrfs_free_space_key(struct extent_buffer *eb,
2664 : struct btrfs_free_space_header *h,
2665 : struct btrfs_disk_key *key)
2666 : {
2667 315 : read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2668 : }
2669 :
2670 : static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2671 : struct btrfs_free_space_header *h,
2672 : struct btrfs_disk_key *key)
2673 : {
2674 179 : write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2675 : }
2676 :
2677 : /* struct btrfs_disk_key */
2678 926 : BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2679 : objectid, 64);
2680 10410 : BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2681 : BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2682 :
2683 : static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2684 : struct btrfs_disk_key *disk)
2685 : {
2686 39445349 : cpu->offset = le64_to_cpu(disk->offset);
2687 39445349 : cpu->type = disk->type;
2688 39445902 : cpu->objectid = le64_to_cpu(disk->objectid);
2689 : }
2690 :
2691 : static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2692 : struct btrfs_key *cpu)
2693 : {
2694 351977 : disk->offset = cpu_to_le64(cpu->offset);
2695 351977 : disk->type = cpu->type;
2696 351977 : disk->objectid = cpu_to_le64(cpu->objectid);
2697 : }
2698 :
2699 : static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
2700 : struct btrfs_key *key, int nr)
2701 : {
2702 : struct btrfs_disk_key disk_key;
2703 1251510 : btrfs_node_key(eb, &disk_key, nr);
2704 : btrfs_disk_key_to_cpu(key, &disk_key);
2705 : }
2706 :
2707 9857108 : static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
2708 : struct btrfs_key *key, int nr)
2709 : {
2710 : struct btrfs_disk_key disk_key;
2711 : btrfs_item_key(eb, &disk_key, nr);
2712 : btrfs_disk_key_to_cpu(key, &disk_key);
2713 9857392 : }
2714 :
2715 171483 : static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
2716 : struct btrfs_dir_item *item,
2717 : struct btrfs_key *key)
2718 : {
2719 : struct btrfs_disk_key disk_key;
2720 : btrfs_dir_item_key(eb, item, &disk_key);
2721 : btrfs_disk_key_to_cpu(key, &disk_key);
2722 171483 : }
2723 :
2724 :
2725 : static inline u8 btrfs_key_type(struct btrfs_key *key)
2726 : {
2727 : return key->type;
2728 : }
2729 :
2730 : static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2731 : {
2732 893562 : key->type = val;
2733 : }
2734 :
2735 : /* struct btrfs_header */
2736 118097 : BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2737 5613033 : BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2738 : generation, 64);
2739 185424 : BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2740 16516534 : BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2741 1967271 : BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2742 12250795 : BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2743 12293 : BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2744 : generation, 64);
2745 : BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2746 : BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2747 : nritems, 32);
2748 12293 : BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2749 :
2750 4756 : static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2751 : {
2752 3032843 : return (btrfs_header_flags(eb) & flag) == flag;
2753 : }
2754 :
2755 57483 : static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2756 : {
2757 : u64 flags = btrfs_header_flags(eb);
2758 57483 : btrfs_set_header_flags(eb, flags | flag);
2759 : return (flags & flag) == flag;
2760 : }
2761 :
2762 52871 : static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2763 : {
2764 : u64 flags = btrfs_header_flags(eb);
2765 52871 : btrfs_set_header_flags(eb, flags & ~flag);
2766 : return (flags & flag) == flag;
2767 : }
2768 :
2769 86754 : static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2770 : {
2771 : u64 flags = btrfs_header_flags(eb);
2772 86755 : return flags >> BTRFS_BACKREF_REV_SHIFT;
2773 : }
2774 :
2775 58887 : static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2776 : int rev)
2777 : {
2778 : u64 flags = btrfs_header_flags(eb);
2779 58887 : flags &= ~BTRFS_BACKREF_REV_MASK;
2780 58887 : flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2781 : btrfs_set_header_flags(eb, flags);
2782 : }
2783 :
2784 : static inline unsigned long btrfs_header_fsid(void)
2785 : {
2786 : return offsetof(struct btrfs_header, fsid);
2787 : }
2788 :
2789 : static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2790 : {
2791 : return offsetof(struct btrfs_header, chunk_tree_uuid);
2792 : }
2793 :
2794 0 : static inline int btrfs_is_leaf(struct extent_buffer *eb)
2795 : {
2796 : return btrfs_header_level(eb) == 0;
2797 : }
2798 :
2799 : /* struct btrfs_root_item */
2800 : BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2801 : generation, 64);
2802 : BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2803 : BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2804 : BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2805 :
2806 28719 : BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2807 : generation, 64);
2808 25981 : BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2809 13863 : BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2810 359 : BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2811 2755776 : BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2812 697 : BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2813 28280 : BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2814 291 : BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2815 28282 : BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2816 : last_snapshot, 64);
2817 13087 : BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2818 : generation_v2, 64);
2819 170725 : BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2820 : ctransid, 64);
2821 624 : BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2822 : otransid, 64);
2823 89 : BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2824 : stransid, 64);
2825 518 : BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2826 : rtransid, 64);
2827 :
2828 : static inline bool btrfs_root_readonly(struct btrfs_root *root)
2829 : {
2830 140357 : return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2831 : }
2832 :
2833 : static inline bool btrfs_root_dead(struct btrfs_root *root)
2834 : {
2835 55 : return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2836 : }
2837 :
2838 : /* struct btrfs_root_backup */
2839 3575 : BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2840 : tree_root, 64);
2841 8061 : BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2842 : tree_root_gen, 64);
2843 3575 : BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2844 : tree_root_level, 8);
2845 :
2846 3575 : BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2847 : chunk_root, 64);
2848 3575 : BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2849 : chunk_root_gen, 64);
2850 3575 : BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2851 : chunk_root_level, 8);
2852 :
2853 3575 : BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2854 : extent_root, 64);
2855 3575 : BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2856 : extent_root_gen, 64);
2857 3575 : BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2858 : extent_root_level, 8);
2859 :
2860 3575 : BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2861 : fs_root, 64);
2862 3575 : BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2863 : fs_root_gen, 64);
2864 3575 : BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2865 : fs_root_level, 8);
2866 :
2867 3575 : BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2868 : dev_root, 64);
2869 3575 : BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2870 : dev_root_gen, 64);
2871 3575 : BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2872 : dev_root_level, 8);
2873 :
2874 3575 : BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2875 : csum_root, 64);
2876 3575 : BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2877 : csum_root_gen, 64);
2878 3575 : BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2879 : csum_root_level, 8);
2880 3575 : BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2881 : total_bytes, 64);
2882 3575 : BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2883 : bytes_used, 64);
2884 3575 : BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2885 : num_devices, 64);
2886 :
2887 : /* struct btrfs_balance_item */
2888 : BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2889 :
2890 : static inline void btrfs_balance_data(struct extent_buffer *eb,
2891 : struct btrfs_balance_item *bi,
2892 : struct btrfs_disk_balance_args *ba)
2893 : {
2894 0 : read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2895 : }
2896 :
2897 : static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2898 : struct btrfs_balance_item *bi,
2899 : struct btrfs_disk_balance_args *ba)
2900 : {
2901 22 : write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2902 : }
2903 :
2904 : static inline void btrfs_balance_meta(struct extent_buffer *eb,
2905 : struct btrfs_balance_item *bi,
2906 : struct btrfs_disk_balance_args *ba)
2907 : {
2908 0 : read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2909 : }
2910 :
2911 : static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2912 : struct btrfs_balance_item *bi,
2913 : struct btrfs_disk_balance_args *ba)
2914 : {
2915 22 : write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2916 : }
2917 :
2918 : static inline void btrfs_balance_sys(struct extent_buffer *eb,
2919 : struct btrfs_balance_item *bi,
2920 : struct btrfs_disk_balance_args *ba)
2921 : {
2922 0 : read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2923 : }
2924 :
2925 : static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2926 : struct btrfs_balance_item *bi,
2927 : struct btrfs_disk_balance_args *ba)
2928 : {
2929 22 : write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2930 : }
2931 :
2932 : static inline void
2933 0 : btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2934 : struct btrfs_disk_balance_args *disk)
2935 : {
2936 0 : memset(cpu, 0, sizeof(*cpu));
2937 :
2938 0 : cpu->profiles = le64_to_cpu(disk->profiles);
2939 0 : cpu->usage = le64_to_cpu(disk->usage);
2940 0 : cpu->devid = le64_to_cpu(disk->devid);
2941 0 : cpu->pstart = le64_to_cpu(disk->pstart);
2942 0 : cpu->pend = le64_to_cpu(disk->pend);
2943 0 : cpu->vstart = le64_to_cpu(disk->vstart);
2944 0 : cpu->vend = le64_to_cpu(disk->vend);
2945 0 : cpu->target = le64_to_cpu(disk->target);
2946 0 : cpu->flags = le64_to_cpu(disk->flags);
2947 0 : cpu->limit = le64_to_cpu(disk->limit);
2948 0 : }
2949 :
2950 : static inline void
2951 66 : btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2952 : struct btrfs_balance_args *cpu)
2953 : {
2954 66 : memset(disk, 0, sizeof(*disk));
2955 :
2956 66 : disk->profiles = cpu_to_le64(cpu->profiles);
2957 66 : disk->usage = cpu_to_le64(cpu->usage);
2958 66 : disk->devid = cpu_to_le64(cpu->devid);
2959 66 : disk->pstart = cpu_to_le64(cpu->pstart);
2960 66 : disk->pend = cpu_to_le64(cpu->pend);
2961 66 : disk->vstart = cpu_to_le64(cpu->vstart);
2962 66 : disk->vend = cpu_to_le64(cpu->vend);
2963 66 : disk->target = cpu_to_le64(cpu->target);
2964 66 : disk->flags = cpu_to_le64(cpu->flags);
2965 66 : disk->limit = cpu_to_le64(cpu->limit);
2966 66 : }
2967 :
2968 : /* struct btrfs_super_block */
2969 6959 : BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2970 7781 : BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2971 2644 : BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2972 : generation, 64);
2973 663 : BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2974 315 : BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2975 : struct btrfs_super_block, sys_chunk_array_size, 32);
2976 221 : BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2977 : struct btrfs_super_block, chunk_root_generation, 64);
2978 0 : BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2979 : root_level, 8);
2980 221 : BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2981 : chunk_root, 64);
2982 : BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2983 : chunk_root_level, 8);
2984 3796 : BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2985 : log_root, 64);
2986 : BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2987 : log_root_transid, 64);
2988 3575 : BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2989 : log_root_level, 8);
2990 23959 : BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2991 : total_bytes, 64);
2992 344287 : BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2993 : bytes_used, 64);
2994 221 : BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2995 : sectorsize, 32);
2996 442 : BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2997 : nodesize, 32);
2998 663 : BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2999 : leafsize, 32);
3000 221 : BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
3001 : stripesize, 32);
3002 37 : BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
3003 : root_dir_objectid, 64);
3004 7984 : BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
3005 : num_devices, 64);
3006 442 : BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
3007 : compat_flags, 64);
3008 663 : BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
3009 : compat_ro_flags, 64);
3010 1244000 : BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
3011 : incompat_flags, 64);
3012 626766 : BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
3013 : csum_type, 16);
3014 221 : BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
3015 : cache_generation, 64);
3016 1319 : BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3017 122 : BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
3018 : uuid_tree_generation, 64);
3019 :
3020 : static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
3021 : {
3022 : u16 t = btrfs_super_csum_type(s);
3023 : /*
3024 : * csum type is validated at mount time
3025 : */
3026 626545 : return btrfs_csum_sizes[t];
3027 : }
3028 :
3029 : static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3030 : {
3031 : return offsetof(struct btrfs_leaf, items);
3032 : }
3033 :
3034 : /* struct btrfs_file_extent_item */
3035 34 : BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3036 : BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
3037 : struct btrfs_file_extent_item, disk_bytenr, 64);
3038 : BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
3039 : struct btrfs_file_extent_item, offset, 64);
3040 : BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
3041 : struct btrfs_file_extent_item, generation, 64);
3042 : BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
3043 : struct btrfs_file_extent_item, num_bytes, 64);
3044 : BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
3045 : struct btrfs_file_extent_item, disk_num_bytes, 64);
3046 : BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
3047 : struct btrfs_file_extent_item, compression, 8);
3048 :
3049 : static inline unsigned long
3050 : btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3051 : {
3052 0 : unsigned long offset = (unsigned long)e;
3053 6362 : offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
3054 : return offset;
3055 : }
3056 :
3057 : static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
3058 : {
3059 8484 : return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
3060 : }
3061 :
3062 2403 : BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
3063 : disk_bytenr, 64);
3064 2403 : BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
3065 : generation, 64);
3066 2403 : BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
3067 : disk_num_bytes, 64);
3068 2403 : BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
3069 : offset, 64);
3070 2403 : BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
3071 : num_bytes, 64);
3072 2403 : BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
3073 : ram_bytes, 64);
3074 5295 : BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
3075 : compression, 8);
3076 5295 : BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
3077 : encryption, 8);
3078 5295 : BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
3079 : other_encoding, 16);
3080 :
3081 : /*
3082 : * this returns the number of bytes used by the item on disk, minus the
3083 : * size of any extent headers. If a file is compressed on disk, this is
3084 : * the compressed size
3085 : */
3086 : static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
3087 : struct btrfs_item *e)
3088 : {
3089 : unsigned long offset;
3090 : offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
3091 2892 : return btrfs_item_size(eb, e) - offset;
3092 : }
3093 :
3094 : /* this returns the number of file bytes represented by the inline item.
3095 : * If an item is compressed, this is the uncompressed size
3096 : */
3097 2892 : static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
3098 : int slot,
3099 : struct btrfs_file_extent_item *fi)
3100 : {
3101 : struct btrfs_map_token token;
3102 :
3103 : btrfs_init_map_token(&token);
3104 : /*
3105 : * return the space used on disk if this item isn't
3106 : * compressed or encoded
3107 : */
3108 5784 : if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
3109 2892 : btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
3110 : btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
3111 2892 : return btrfs_file_extent_inline_item_len(eb,
3112 : btrfs_item_nr(slot));
3113 : }
3114 :
3115 : /* otherwise use the ram bytes field */
3116 0 : return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
3117 : }
3118 :
3119 :
3120 : /* btrfs_dev_stats_item */
3121 : static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
3122 : struct btrfs_dev_stats_item *ptr,
3123 : int index)
3124 : {
3125 : u64 val;
3126 :
3127 645 : read_extent_buffer(eb, &val,
3128 : offsetof(struct btrfs_dev_stats_item, values) +
3129 645 : ((unsigned long)ptr) + (index * sizeof(u64)),
3130 : sizeof(val));
3131 645 : return val;
3132 : }
3133 :
3134 : static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
3135 : struct btrfs_dev_stats_item *ptr,
3136 : int index, u64 val)
3137 : {
3138 1105 : write_extent_buffer(eb, &val,
3139 : offsetof(struct btrfs_dev_stats_item, values) +
3140 1105 : ((unsigned long)ptr) + (index * sizeof(u64)),
3141 : sizeof(val));
3142 : }
3143 :
3144 : /* btrfs_qgroup_status_item */
3145 : BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
3146 : generation, 64);
3147 : BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
3148 : version, 64);
3149 : BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
3150 : flags, 64);
3151 : BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
3152 : rescan, 64);
3153 :
3154 : /* btrfs_qgroup_info_item */
3155 : BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
3156 : generation, 64);
3157 : BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
3158 : BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
3159 : rfer_cmpr, 64);
3160 : BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
3161 : BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
3162 : excl_cmpr, 64);
3163 :
3164 : BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
3165 : struct btrfs_qgroup_info_item, generation, 64);
3166 : BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
3167 : rfer, 64);
3168 : BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
3169 : struct btrfs_qgroup_info_item, rfer_cmpr, 64);
3170 : BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
3171 : excl, 64);
3172 : BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
3173 : struct btrfs_qgroup_info_item, excl_cmpr, 64);
3174 :
3175 : /* btrfs_qgroup_limit_item */
3176 : BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
3177 : flags, 64);
3178 : BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
3179 : max_rfer, 64);
3180 : BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
3181 : max_excl, 64);
3182 : BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
3183 : rsv_rfer, 64);
3184 : BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
3185 : rsv_excl, 64);
3186 :
3187 : /* btrfs_dev_replace_item */
3188 : BTRFS_SETGET_FUNCS(dev_replace_src_devid,
3189 : struct btrfs_dev_replace_item, src_devid, 64);
3190 : BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
3191 : struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
3192 : 64);
3193 : BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
3194 : replace_state, 64);
3195 : BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
3196 : time_started, 64);
3197 : BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
3198 : time_stopped, 64);
3199 : BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
3200 : num_write_errors, 64);
3201 : BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
3202 : struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
3203 : 64);
3204 : BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
3205 : cursor_left, 64);
3206 : BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
3207 : cursor_right, 64);
3208 :
3209 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
3210 : struct btrfs_dev_replace_item, src_devid, 64);
3211 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
3212 : struct btrfs_dev_replace_item,
3213 : cont_reading_from_srcdev_mode, 64);
3214 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
3215 : struct btrfs_dev_replace_item, replace_state, 64);
3216 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
3217 : struct btrfs_dev_replace_item, time_started, 64);
3218 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
3219 : struct btrfs_dev_replace_item, time_stopped, 64);
3220 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
3221 : struct btrfs_dev_replace_item, num_write_errors, 64);
3222 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
3223 : struct btrfs_dev_replace_item,
3224 : num_uncorrectable_read_errors, 64);
3225 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
3226 : struct btrfs_dev_replace_item, cursor_left, 64);
3227 : BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
3228 : struct btrfs_dev_replace_item, cursor_right, 64);
3229 :
3230 : static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
3231 : {
3232 : return sb->s_fs_info;
3233 : }
3234 :
3235 : static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
3236 : {
3237 2257165 : if (level == 0)
3238 1975549 : return root->leafsize;
3239 : return root->nodesize;
3240 : }
3241 :
3242 : /* helper function to cast into the data area of the leaf. */
3243 : #define btrfs_item_ptr(leaf, slot, type) \
3244 : ((type *)(btrfs_leaf_data(leaf) + \
3245 : btrfs_item_offset_nr(leaf, slot)))
3246 :
3247 : #define btrfs_item_ptr_offset(leaf, slot) \
3248 : ((unsigned long)(btrfs_leaf_data(leaf) + \
3249 : btrfs_item_offset_nr(leaf, slot)))
3250 :
3251 : static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
3252 : {
3253 112344 : return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
3254 : (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
3255 : }
3256 :
3257 130124 : static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
3258 : {
3259 130124 : return mapping_gfp_mask(mapping) & ~__GFP_FS;
3260 : }
3261 :
3262 : /* extent-tree.c */
3263 : static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3264 : unsigned num_items)
3265 : {
3266 1272493 : return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3267 638147 : 2 * num_items;
3268 : }
3269 :
3270 : /*
3271 : * Doing a truncate won't result in new nodes or leaves, just what we need for
3272 : * COW.
3273 : */
3274 : static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
3275 : unsigned num_items)
3276 : {
3277 32699 : return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3278 : num_items;
3279 : }
3280 :
3281 : int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
3282 : struct btrfs_root *root);
3283 : int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
3284 : struct btrfs_root *root);
3285 : void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3286 : int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
3287 : struct btrfs_root *root, unsigned long count);
3288 : int btrfs_async_run_delayed_refs(struct btrfs_root *root,
3289 : unsigned long count, int wait);
3290 : int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
3291 : int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
3292 : struct btrfs_root *root, u64 bytenr,
3293 : u64 offset, int metadata, u64 *refs, u64 *flags);
3294 : int btrfs_pin_extent(struct btrfs_root *root,
3295 : u64 bytenr, u64 num, int reserved);
3296 : int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3297 : u64 bytenr, u64 num_bytes);
3298 : int btrfs_exclude_logged_extents(struct btrfs_root *root,
3299 : struct extent_buffer *eb);
3300 : int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3301 : struct btrfs_root *root,
3302 : u64 objectid, u64 offset, u64 bytenr);
3303 : struct btrfs_block_group_cache *btrfs_lookup_block_group(
3304 : struct btrfs_fs_info *info,
3305 : u64 bytenr);
3306 : void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3307 : int get_block_group_index(struct btrfs_block_group_cache *cache);
3308 : struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
3309 : struct btrfs_root *root, u32 blocksize,
3310 : u64 parent, u64 root_objectid,
3311 : struct btrfs_disk_key *key, int level,
3312 : u64 hint, u64 empty_size);
3313 : void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
3314 : struct btrfs_root *root,
3315 : struct extent_buffer *buf,
3316 : u64 parent, int last_ref);
3317 : int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
3318 : struct btrfs_root *root,
3319 : u64 root_objectid, u64 owner,
3320 : u64 offset, struct btrfs_key *ins);
3321 : int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
3322 : struct btrfs_root *root,
3323 : u64 root_objectid, u64 owner, u64 offset,
3324 : struct btrfs_key *ins);
3325 : int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
3326 : u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3327 : struct btrfs_key *ins, int is_data, int delalloc);
3328 : int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3329 : struct extent_buffer *buf, int full_backref);
3330 : int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3331 : struct extent_buffer *buf, int full_backref);
3332 : int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
3333 : struct btrfs_root *root,
3334 : u64 bytenr, u64 num_bytes, u64 flags,
3335 : int level, int is_data);
3336 : int btrfs_free_extent(struct btrfs_trans_handle *trans,
3337 : struct btrfs_root *root,
3338 : u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3339 : u64 owner, u64 offset, int no_quota);
3340 :
3341 : int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
3342 : int delalloc);
3343 : int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
3344 : u64 start, u64 len);
3345 : void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
3346 : struct btrfs_root *root);
3347 : int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3348 : struct btrfs_root *root);
3349 : int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
3350 : struct btrfs_root *root,
3351 : u64 bytenr, u64 num_bytes, u64 parent,
3352 : u64 root_objectid, u64 owner, u64 offset, int no_quota);
3353 :
3354 : int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
3355 : struct btrfs_root *root);
3356 : int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
3357 : int btrfs_free_block_groups(struct btrfs_fs_info *info);
3358 : int btrfs_read_block_groups(struct btrfs_root *root);
3359 : int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3360 : int btrfs_make_block_group(struct btrfs_trans_handle *trans,
3361 : struct btrfs_root *root, u64 bytes_used,
3362 : u64 type, u64 chunk_objectid, u64 chunk_offset,
3363 : u64 size);
3364 : int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3365 : struct btrfs_root *root, u64 group_start);
3366 : void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
3367 : struct btrfs_root *root);
3368 : u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3369 : void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
3370 :
3371 : enum btrfs_reserve_flush_enum {
3372 : /* If we are in the transaction, we can't flush anything.*/
3373 : BTRFS_RESERVE_NO_FLUSH,
3374 : /*
3375 : * Flushing delalloc may cause deadlock somewhere, in this
3376 : * case, use FLUSH LIMIT
3377 : */
3378 : BTRFS_RESERVE_FLUSH_LIMIT,
3379 : BTRFS_RESERVE_FLUSH_ALL,
3380 : };
3381 :
3382 : int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
3383 : void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3384 : void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
3385 : struct btrfs_root *root);
3386 : int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
3387 : struct inode *inode);
3388 : void btrfs_orphan_release_metadata(struct inode *inode);
3389 : int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
3390 : struct btrfs_block_rsv *rsv,
3391 : int nitems,
3392 : u64 *qgroup_reserved, bool use_global_rsv);
3393 : void btrfs_subvolume_release_metadata(struct btrfs_root *root,
3394 : struct btrfs_block_rsv *rsv,
3395 : u64 qgroup_reserved);
3396 : int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
3397 : void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3398 : int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
3399 : void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3400 : void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
3401 : struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
3402 : unsigned short type);
3403 : void btrfs_free_block_rsv(struct btrfs_root *root,
3404 : struct btrfs_block_rsv *rsv);
3405 : int btrfs_block_rsv_add(struct btrfs_root *root,
3406 : struct btrfs_block_rsv *block_rsv, u64 num_bytes,
3407 : enum btrfs_reserve_flush_enum flush);
3408 : int btrfs_block_rsv_check(struct btrfs_root *root,
3409 : struct btrfs_block_rsv *block_rsv, int min_factor);
3410 : int btrfs_block_rsv_refill(struct btrfs_root *root,
3411 : struct btrfs_block_rsv *block_rsv, u64 min_reserved,
3412 : enum btrfs_reserve_flush_enum flush);
3413 : int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
3414 : struct btrfs_block_rsv *dst_rsv,
3415 : u64 num_bytes);
3416 : int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
3417 : struct btrfs_block_rsv *dest, u64 num_bytes,
3418 : int min_factor);
3419 : void btrfs_block_rsv_release(struct btrfs_root *root,
3420 : struct btrfs_block_rsv *block_rsv,
3421 : u64 num_bytes);
3422 : int btrfs_set_block_group_ro(struct btrfs_root *root,
3423 : struct btrfs_block_group_cache *cache);
3424 : void btrfs_set_block_group_rw(struct btrfs_root *root,
3425 : struct btrfs_block_group_cache *cache);
3426 : void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3427 : u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
3428 : int btrfs_error_unpin_extent_range(struct btrfs_root *root,
3429 : u64 start, u64 end);
3430 : int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
3431 : u64 num_bytes, u64 *actual_bytes);
3432 : int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
3433 : struct btrfs_root *root, u64 type);
3434 : int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
3435 :
3436 : int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3437 : int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
3438 : struct btrfs_fs_info *fs_info);
3439 : int __get_raid_index(u64 flags);
3440 : int btrfs_start_nocow_write(struct btrfs_root *root);
3441 : void btrfs_end_nocow_write(struct btrfs_root *root);
3442 : /* ctree.c */
3443 : int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
3444 : int level, int *slot);
3445 : int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
3446 : int btrfs_previous_item(struct btrfs_root *root,
3447 : struct btrfs_path *path, u64 min_objectid,
3448 : int type);
3449 : int btrfs_previous_extent_item(struct btrfs_root *root,
3450 : struct btrfs_path *path, u64 min_objectid);
3451 : void btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
3452 : struct btrfs_key *new_key);
3453 : struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
3454 : struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3455 : int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3456 : struct btrfs_key *key, int lowest_level,
3457 : u64 min_trans);
3458 : int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3459 : struct btrfs_path *path,
3460 : u64 min_trans);
3461 : enum btrfs_compare_tree_result {
3462 : BTRFS_COMPARE_TREE_NEW,
3463 : BTRFS_COMPARE_TREE_DELETED,
3464 : BTRFS_COMPARE_TREE_CHANGED,
3465 : BTRFS_COMPARE_TREE_SAME,
3466 : };
3467 : typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
3468 : struct btrfs_root *right_root,
3469 : struct btrfs_path *left_path,
3470 : struct btrfs_path *right_path,
3471 : struct btrfs_key *key,
3472 : enum btrfs_compare_tree_result result,
3473 : void *ctx);
3474 : int btrfs_compare_trees(struct btrfs_root *left_root,
3475 : struct btrfs_root *right_root,
3476 : btrfs_changed_cb_t cb, void *ctx);
3477 : int btrfs_cow_block(struct btrfs_trans_handle *trans,
3478 : struct btrfs_root *root, struct extent_buffer *buf,
3479 : struct extent_buffer *parent, int parent_slot,
3480 : struct extent_buffer **cow_ret);
3481 : int btrfs_copy_root(struct btrfs_trans_handle *trans,
3482 : struct btrfs_root *root,
3483 : struct extent_buffer *buf,
3484 : struct extent_buffer **cow_ret, u64 new_root_objectid);
3485 : int btrfs_block_can_be_shared(struct btrfs_root *root,
3486 : struct extent_buffer *buf);
3487 : void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3488 : u32 data_size);
3489 : void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3490 : u32 new_size, int from_end);
3491 : int btrfs_split_item(struct btrfs_trans_handle *trans,
3492 : struct btrfs_root *root,
3493 : struct btrfs_path *path,
3494 : struct btrfs_key *new_key,
3495 : unsigned long split_offset);
3496 : int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
3497 : struct btrfs_root *root,
3498 : struct btrfs_path *path,
3499 : struct btrfs_key *new_key);
3500 : int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
3501 : u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3502 : int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
3503 : *root, struct btrfs_key *key, struct btrfs_path *p, int
3504 : ins_len, int cow);
3505 : int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
3506 : struct btrfs_path *p, u64 time_seq);
3507 : int btrfs_search_slot_for_read(struct btrfs_root *root,
3508 : struct btrfs_key *key, struct btrfs_path *p,
3509 : int find_higher, int return_any);
3510 : int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3511 : struct btrfs_root *root, struct extent_buffer *parent,
3512 : int start_slot, u64 *last_ret,
3513 : struct btrfs_key *progress);
3514 : void btrfs_release_path(struct btrfs_path *p);
3515 : struct btrfs_path *btrfs_alloc_path(void);
3516 : void btrfs_free_path(struct btrfs_path *p);
3517 : void btrfs_set_path_blocking(struct btrfs_path *p);
3518 : void btrfs_clear_path_blocking(struct btrfs_path *p,
3519 : struct extent_buffer *held, int held_rw);
3520 : void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
3521 :
3522 : int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3523 : struct btrfs_path *path, int slot, int nr);
3524 : static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
3525 : struct btrfs_root *root,
3526 : struct btrfs_path *path)
3527 : {
3528 37710 : return btrfs_del_items(trans, root, path, path->slots[0], 1);
3529 : }
3530 :
3531 : void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3532 : struct btrfs_key *cpu_key, u32 *data_size,
3533 : u32 total_data, u32 total_size, int nr);
3534 : int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
3535 : *root, struct btrfs_key *key, void *data, u32 data_size);
3536 : int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
3537 : struct btrfs_root *root,
3538 : struct btrfs_path *path,
3539 : struct btrfs_key *cpu_key, u32 *data_size, int nr);
3540 :
3541 : static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
3542 : struct btrfs_root *root,
3543 : struct btrfs_path *path,
3544 : struct btrfs_key *key,
3545 : u32 data_size)
3546 : {
3547 191034 : return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3548 : }
3549 :
3550 : int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3551 : int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3552 : int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3553 : u64 time_seq);
3554 4899718 : static inline int btrfs_next_old_item(struct btrfs_root *root,
3555 : struct btrfs_path *p, u64 time_seq)
3556 : {
3557 4899718 : ++p->slots[0];
3558 9799436 : if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3559 23384 : return btrfs_next_old_leaf(root, p, time_seq);
3560 : return 0;
3561 : }
3562 : static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3563 : {
3564 668095 : return btrfs_next_old_item(root, p, 0);
3565 : }
3566 : int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3567 : int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3568 : struct btrfs_block_rsv *block_rsv,
3569 : int update_ref, int for_reloc);
3570 : int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3571 : struct btrfs_root *root,
3572 : struct extent_buffer *node,
3573 : struct extent_buffer *parent);
3574 : static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3575 : {
3576 : /*
3577 : * Get synced with close_ctree()
3578 : */
3579 10707 : smp_mb();
3580 10707 : return fs_info->closing;
3581 : }
3582 :
3583 : /*
3584 : * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3585 : * anything except sleeping. This function is used to check the status of
3586 : * the fs.
3587 : */
3588 : static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
3589 : {
3590 1988 : return (root->fs_info->sb->s_flags & MS_RDONLY ||
3591 : btrfs_fs_closing(root->fs_info));
3592 : }
3593 :
3594 : static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3595 : {
3596 : kfree(fs_info->balance_ctl);
3597 : kfree(fs_info->delayed_root);
3598 : kfree(fs_info->extent_root);
3599 : kfree(fs_info->tree_root);
3600 : kfree(fs_info->chunk_root);
3601 : kfree(fs_info->dev_root);
3602 : kfree(fs_info->csum_root);
3603 : kfree(fs_info->quota_root);
3604 : kfree(fs_info->uuid_root);
3605 : kfree(fs_info->super_copy);
3606 : kfree(fs_info->super_for_commit);
3607 : kfree(fs_info);
3608 : }
3609 :
3610 : /* tree mod log functions from ctree.c */
3611 : u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3612 : struct seq_list *elem);
3613 : void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3614 : struct seq_list *elem);
3615 : int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3616 :
3617 : /* root-item.c */
3618 : int btrfs_find_root_ref(struct btrfs_root *tree_root,
3619 : struct btrfs_path *path,
3620 : u64 root_id, u64 ref_id);
3621 : int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3622 : struct btrfs_root *tree_root,
3623 : u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3624 : const char *name, int name_len);
3625 : int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3626 : struct btrfs_root *tree_root,
3627 : u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3628 : const char *name, int name_len);
3629 : int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3630 : struct btrfs_key *key);
3631 : int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
3632 : *root, struct btrfs_key *key, struct btrfs_root_item
3633 : *item);
3634 : int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3635 : struct btrfs_root *root,
3636 : struct btrfs_key *key,
3637 : struct btrfs_root_item *item);
3638 : int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
3639 : struct btrfs_path *path, struct btrfs_root_item *root_item,
3640 : struct btrfs_key *root_key);
3641 : int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3642 : void btrfs_set_root_node(struct btrfs_root_item *item,
3643 : struct extent_buffer *node);
3644 : void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3645 : void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3646 : struct btrfs_root *root);
3647 :
3648 : /* uuid-tree.c */
3649 : int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3650 : struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3651 : u64 subid);
3652 : int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3653 : struct btrfs_root *uuid_root, u8 *uuid, u8 type,
3654 : u64 subid);
3655 : int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3656 : int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3657 : u64));
3658 :
3659 : /* dir-item.c */
3660 : int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3661 : const char *name, int name_len);
3662 : int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3663 : struct btrfs_root *root, const char *name,
3664 : int name_len, struct inode *dir,
3665 : struct btrfs_key *location, u8 type, u64 index);
3666 : struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3667 : struct btrfs_root *root,
3668 : struct btrfs_path *path, u64 dir,
3669 : const char *name, int name_len,
3670 : int mod);
3671 : struct btrfs_dir_item *
3672 : btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3673 : struct btrfs_root *root,
3674 : struct btrfs_path *path, u64 dir,
3675 : u64 objectid, const char *name, int name_len,
3676 : int mod);
3677 : struct btrfs_dir_item *
3678 : btrfs_search_dir_index_item(struct btrfs_root *root,
3679 : struct btrfs_path *path, u64 dirid,
3680 : const char *name, int name_len);
3681 : int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3682 : struct btrfs_root *root,
3683 : struct btrfs_path *path,
3684 : struct btrfs_dir_item *di);
3685 : int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3686 : struct btrfs_root *root,
3687 : struct btrfs_path *path, u64 objectid,
3688 : const char *name, u16 name_len,
3689 : const void *data, u16 data_len);
3690 : struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3691 : struct btrfs_root *root,
3692 : struct btrfs_path *path, u64 dir,
3693 : const char *name, u16 name_len,
3694 : int mod);
3695 : int verify_dir_item(struct btrfs_root *root,
3696 : struct extent_buffer *leaf,
3697 : struct btrfs_dir_item *dir_item);
3698 :
3699 : /* orphan.c */
3700 : int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3701 : struct btrfs_root *root, u64 offset);
3702 : int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3703 : struct btrfs_root *root, u64 offset);
3704 : int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3705 :
3706 : /* inode-item.c */
3707 : int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3708 : struct btrfs_root *root,
3709 : const char *name, int name_len,
3710 : u64 inode_objectid, u64 ref_objectid, u64 index);
3711 : int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3712 : struct btrfs_root *root,
3713 : const char *name, int name_len,
3714 : u64 inode_objectid, u64 ref_objectid, u64 *index);
3715 : int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3716 : struct btrfs_root *root,
3717 : struct btrfs_path *path, u64 objectid);
3718 : int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3719 : *root, struct btrfs_path *path,
3720 : struct btrfs_key *location, int mod);
3721 :
3722 : struct btrfs_inode_extref *
3723 : btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3724 : struct btrfs_root *root,
3725 : struct btrfs_path *path,
3726 : const char *name, int name_len,
3727 : u64 inode_objectid, u64 ref_objectid, int ins_len,
3728 : int cow);
3729 :
3730 : int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3731 : u64 ref_objectid, const char *name,
3732 : int name_len,
3733 : struct btrfs_inode_extref **extref_ret);
3734 :
3735 : /* file-item.c */
3736 : struct btrfs_dio_private;
3737 : int btrfs_del_csums(struct btrfs_trans_handle *trans,
3738 : struct btrfs_root *root, u64 bytenr, u64 len);
3739 : int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3740 : struct bio *bio, u32 *dst);
3741 : int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3742 : struct btrfs_dio_private *dip, struct bio *bio,
3743 : u64 logical_offset);
3744 : int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3745 : struct btrfs_root *root,
3746 : u64 objectid, u64 pos,
3747 : u64 disk_offset, u64 disk_num_bytes,
3748 : u64 num_bytes, u64 offset, u64 ram_bytes,
3749 : u8 compression, u8 encryption, u16 other_encoding);
3750 : int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3751 : struct btrfs_root *root,
3752 : struct btrfs_path *path, u64 objectid,
3753 : u64 bytenr, int mod);
3754 : int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3755 : struct btrfs_root *root,
3756 : struct btrfs_ordered_sum *sums);
3757 : int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3758 : struct bio *bio, u64 file_start, int contig);
3759 : int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3760 : struct list_head *list, int search_commit);
3761 : void btrfs_extent_item_to_extent_map(struct inode *inode,
3762 : const struct btrfs_path *path,
3763 : struct btrfs_file_extent_item *fi,
3764 : const bool new_inline,
3765 : struct extent_map *em);
3766 :
3767 : /* inode.c */
3768 : struct btrfs_delalloc_work {
3769 : struct inode *inode;
3770 : int wait;
3771 : int delay_iput;
3772 : struct completion completion;
3773 : struct list_head list;
3774 : struct btrfs_work work;
3775 : };
3776 :
3777 : struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3778 : int wait, int delay_iput);
3779 : void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3780 :
3781 : struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3782 : size_t pg_offset, u64 start, u64 len,
3783 : int create);
3784 : noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3785 : u64 *orig_start, u64 *orig_block_len,
3786 : u64 *ram_bytes);
3787 :
3788 : /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3789 : #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3790 : #define ClearPageChecked ClearPageFsMisc
3791 : #define SetPageChecked SetPageFsMisc
3792 : #define PageChecked PageFsMisc
3793 : #endif
3794 :
3795 : /* This forces readahead on a given range of bytes in an inode */
3796 : static inline void btrfs_force_ra(struct address_space *mapping,
3797 : struct file_ra_state *ra, struct file *file,
3798 : pgoff_t offset, unsigned long req_size)
3799 : {
3800 21957 : page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3801 : }
3802 :
3803 : struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3804 : int btrfs_set_inode_index(struct inode *dir, u64 *index);
3805 : int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3806 : struct btrfs_root *root,
3807 : struct inode *dir, struct inode *inode,
3808 : const char *name, int name_len);
3809 : int btrfs_add_link(struct btrfs_trans_handle *trans,
3810 : struct inode *parent_inode, struct inode *inode,
3811 : const char *name, int name_len, int add_backref, u64 index);
3812 : int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3813 : struct btrfs_root *root,
3814 : struct inode *dir, u64 objectid,
3815 : const char *name, int name_len);
3816 : int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
3817 : int front);
3818 : int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3819 : struct btrfs_root *root,
3820 : struct inode *inode, u64 new_size,
3821 : u32 min_type);
3822 :
3823 : int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3824 : int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3825 : int nr);
3826 : int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3827 : struct extent_state **cached_state);
3828 : int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3829 : struct btrfs_root *new_root,
3830 : struct btrfs_root *parent_root,
3831 : u64 new_dirid);
3832 : int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
3833 : size_t size, struct bio *bio,
3834 : unsigned long bio_flags);
3835 : int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3836 : int btrfs_readpage(struct file *file, struct page *page);
3837 : void btrfs_evict_inode(struct inode *inode);
3838 : int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3839 : struct inode *btrfs_alloc_inode(struct super_block *sb);
3840 : void btrfs_destroy_inode(struct inode *inode);
3841 : int btrfs_drop_inode(struct inode *inode);
3842 : int btrfs_init_cachep(void);
3843 : void btrfs_destroy_cachep(void);
3844 : long btrfs_ioctl_trans_end(struct file *file);
3845 : struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3846 : struct btrfs_root *root, int *was_new);
3847 : struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3848 : size_t pg_offset, u64 start, u64 end,
3849 : int create);
3850 : int btrfs_update_inode(struct btrfs_trans_handle *trans,
3851 : struct btrfs_root *root,
3852 : struct inode *inode);
3853 : int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3854 : struct btrfs_root *root, struct inode *inode);
3855 : int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3856 : int btrfs_orphan_cleanup(struct btrfs_root *root);
3857 : void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3858 : struct btrfs_root *root);
3859 : int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3860 : void btrfs_invalidate_inodes(struct btrfs_root *root);
3861 : void btrfs_add_delayed_iput(struct inode *inode);
3862 : void btrfs_run_delayed_iputs(struct btrfs_root *root);
3863 : int btrfs_prealloc_file_range(struct inode *inode, int mode,
3864 : u64 start, u64 num_bytes, u64 min_size,
3865 : loff_t actual_len, u64 *alloc_hint);
3866 : int btrfs_prealloc_file_range_trans(struct inode *inode,
3867 : struct btrfs_trans_handle *trans, int mode,
3868 : u64 start, u64 num_bytes, u64 min_size,
3869 : loff_t actual_len, u64 *alloc_hint);
3870 : extern const struct dentry_operations btrfs_dentry_operations;
3871 :
3872 : /* ioctl.c */
3873 : long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3874 : void btrfs_update_iflags(struct inode *inode);
3875 : void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3876 : int btrfs_is_empty_uuid(u8 *uuid);
3877 : int btrfs_defrag_file(struct inode *inode, struct file *file,
3878 : struct btrfs_ioctl_defrag_range_args *range,
3879 : u64 newer_than, unsigned long max_pages);
3880 : void btrfs_get_block_group_info(struct list_head *groups_list,
3881 : struct btrfs_ioctl_space_info *space);
3882 : void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3883 : struct btrfs_ioctl_balance_args *bargs);
3884 :
3885 :
3886 : /* file.c */
3887 : int btrfs_auto_defrag_init(void);
3888 : void btrfs_auto_defrag_exit(void);
3889 : int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3890 : struct inode *inode);
3891 : int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3892 : void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3893 : int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3894 : void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3895 : int skip_pinned);
3896 : extern const struct file_operations btrfs_file_operations;
3897 : int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3898 : struct btrfs_root *root, struct inode *inode,
3899 : struct btrfs_path *path, u64 start, u64 end,
3900 : u64 *drop_end, int drop_cache,
3901 : int replace_extent,
3902 : u32 extent_item_size,
3903 : int *key_inserted);
3904 : int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3905 : struct btrfs_root *root, struct inode *inode, u64 start,
3906 : u64 end, int drop_cache);
3907 : int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3908 : struct inode *inode, u64 start, u64 end);
3909 : int btrfs_release_file(struct inode *inode, struct file *file);
3910 : int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3911 : struct page **pages, size_t num_pages,
3912 : loff_t pos, size_t write_bytes,
3913 : struct extent_state **cached);
3914 :
3915 : /* tree-defrag.c */
3916 : int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3917 : struct btrfs_root *root);
3918 :
3919 : /* sysfs.c */
3920 : int btrfs_init_sysfs(void);
3921 : void btrfs_exit_sysfs(void);
3922 : int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info);
3923 : void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info);
3924 :
3925 : /* xattr.c */
3926 : ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3927 :
3928 : /* super.c */
3929 : int btrfs_parse_options(struct btrfs_root *root, char *options);
3930 : int btrfs_sync_fs(struct super_block *sb, int wait);
3931 :
3932 : #ifdef CONFIG_PRINTK
3933 : __printf(2, 3)
3934 : void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3935 : #else
3936 : static inline __printf(2, 3)
3937 : void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3938 : {
3939 : }
3940 : #endif
3941 :
3942 : #define btrfs_emerg(fs_info, fmt, args...) \
3943 : btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3944 : #define btrfs_alert(fs_info, fmt, args...) \
3945 : btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3946 : #define btrfs_crit(fs_info, fmt, args...) \
3947 : btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3948 : #define btrfs_err(fs_info, fmt, args...) \
3949 : btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3950 : #define btrfs_warn(fs_info, fmt, args...) \
3951 : btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3952 : #define btrfs_notice(fs_info, fmt, args...) \
3953 : btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3954 : #define btrfs_info(fs_info, fmt, args...) \
3955 : btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3956 :
3957 : #ifdef DEBUG
3958 : #define btrfs_debug(fs_info, fmt, args...) \
3959 : btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3960 : #else
3961 : #define btrfs_debug(fs_info, fmt, args...) \
3962 : no_printk(KERN_DEBUG fmt, ##args)
3963 : #endif
3964 :
3965 : #ifdef CONFIG_BTRFS_ASSERT
3966 :
3967 : static inline void assfail(char *expr, char *file, int line)
3968 : {
3969 : pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3970 : expr, file, line);
3971 : BUG();
3972 : }
3973 :
3974 : #define ASSERT(expr) \
3975 : (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3976 : #else
3977 : #define ASSERT(expr) ((void)0)
3978 : #endif
3979 :
3980 : #define btrfs_assert()
3981 : __printf(5, 6)
3982 : void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
3983 : unsigned int line, int errno, const char *fmt, ...);
3984 :
3985 :
3986 : void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3987 : struct btrfs_root *root, const char *function,
3988 : unsigned int line, int errno);
3989 :
3990 : #define btrfs_set_fs_incompat(__fs_info, opt) \
3991 : __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3992 :
3993 3 : static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3994 : u64 flag)
3995 : {
3996 : struct btrfs_super_block *disk_super;
3997 : u64 features;
3998 :
3999 3 : disk_super = fs_info->super_copy;
4000 : features = btrfs_super_incompat_flags(disk_super);
4001 3 : if (!(features & flag)) {
4002 : spin_lock(&fs_info->super_lock);
4003 : features = btrfs_super_incompat_flags(disk_super);
4004 2 : if (!(features & flag)) {
4005 2 : features |= flag;
4006 : btrfs_set_super_incompat_flags(disk_super, features);
4007 2 : btrfs_info(fs_info, "setting %llu feature flag",
4008 : flag);
4009 : }
4010 : spin_unlock(&fs_info->super_lock);
4011 : }
4012 3 : }
4013 :
4014 : #define btrfs_fs_incompat(fs_info, opt) \
4015 : __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
4016 :
4017 : static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4018 : {
4019 : struct btrfs_super_block *disk_super;
4020 : disk_super = fs_info->super_copy;
4021 1238949 : return !!(btrfs_super_incompat_flags(disk_super) & flag);
4022 : }
4023 :
4024 : /*
4025 : * Call btrfs_abort_transaction as early as possible when an error condition is
4026 : * detected, that way the exact line number is reported.
4027 : */
4028 :
4029 : #define btrfs_abort_transaction(trans, root, errno) \
4030 : do { \
4031 : __btrfs_abort_transaction(trans, root, __func__, \
4032 : __LINE__, errno); \
4033 : } while (0)
4034 :
4035 : #define btrfs_std_error(fs_info, errno) \
4036 : do { \
4037 : if ((errno)) \
4038 : __btrfs_std_error((fs_info), __func__, \
4039 : __LINE__, (errno), NULL); \
4040 : } while (0)
4041 :
4042 : #define btrfs_error(fs_info, errno, fmt, args...) \
4043 : do { \
4044 : __btrfs_std_error((fs_info), __func__, __LINE__, \
4045 : (errno), fmt, ##args); \
4046 : } while (0)
4047 :
4048 : __printf(5, 6)
4049 : void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
4050 : unsigned int line, int errno, const char *fmt, ...);
4051 :
4052 : /*
4053 : * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
4054 : * will panic(). Otherwise we BUG() here.
4055 : */
4056 : #define btrfs_panic(fs_info, errno, fmt, args...) \
4057 : do { \
4058 : __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
4059 : BUG(); \
4060 : } while (0)
4061 :
4062 : /* acl.c */
4063 : #ifdef CONFIG_BTRFS_FS_POSIX_ACL
4064 : struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4065 : int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4066 : int btrfs_init_acl(struct btrfs_trans_handle *trans,
4067 : struct inode *inode, struct inode *dir);
4068 : #else
4069 : #define btrfs_get_acl NULL
4070 : #define btrfs_set_acl NULL
4071 : static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
4072 : struct inode *inode, struct inode *dir)
4073 : {
4074 : return 0;
4075 : }
4076 : #endif
4077 :
4078 : /* relocation.c */
4079 : int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
4080 : int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
4081 : struct btrfs_root *root);
4082 : int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
4083 : struct btrfs_root *root);
4084 : int btrfs_recover_relocation(struct btrfs_root *root);
4085 : int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
4086 : int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
4087 : struct btrfs_root *root, struct extent_buffer *buf,
4088 : struct extent_buffer *cow);
4089 : void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
4090 : struct btrfs_pending_snapshot *pending,
4091 : u64 *bytes_to_reserve);
4092 : int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4093 : struct btrfs_pending_snapshot *pending);
4094 :
4095 : /* scrub.c */
4096 : int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
4097 : u64 end, struct btrfs_scrub_progress *progress,
4098 : int readonly, int is_dev_replace);
4099 : void btrfs_scrub_pause(struct btrfs_root *root);
4100 : void btrfs_scrub_continue(struct btrfs_root *root);
4101 : int btrfs_scrub_cancel(struct btrfs_fs_info *info);
4102 : int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
4103 : struct btrfs_device *dev);
4104 : int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
4105 : struct btrfs_scrub_progress *progress);
4106 :
4107 : /* dev-replace.c */
4108 : void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
4109 : void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4110 : void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info);
4111 :
4112 : /* reada.c */
4113 : struct reada_control {
4114 : struct btrfs_root *root; /* tree to prefetch */
4115 : struct btrfs_key key_start;
4116 : struct btrfs_key key_end; /* exclusive */
4117 : atomic_t elems;
4118 : struct kref refcnt;
4119 : wait_queue_head_t wait;
4120 : };
4121 : struct reada_control *btrfs_reada_add(struct btrfs_root *root,
4122 : struct btrfs_key *start, struct btrfs_key *end);
4123 : int btrfs_reada_wait(void *handle);
4124 : void btrfs_reada_detach(void *handle);
4125 : int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
4126 : u64 start, int err);
4127 :
4128 : static inline int is_fstree(u64 rootid)
4129 : {
4130 1199678 : if (rootid == BTRFS_FS_TREE_OBJECTID ||
4131 599839 : (s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID)
4132 : return 1;
4133 : return 0;
4134 : }
4135 :
4136 : static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
4137 : {
4138 : return signal_pending(current);
4139 : }
4140 :
4141 : /* Sanity test specific functions */
4142 : #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
4143 : void btrfs_test_destroy_inode(struct inode *inode);
4144 : int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
4145 : u64 rfer, u64 excl);
4146 : #endif
4147 :
4148 : #endif
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