1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2007 Oracle. All rights reserved.
4 */
5
6 #ifndef BTRFS_CTREE_H
7 #define BTRFS_CTREE_H
8
9 #include <linux/mm.h>
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
12 #include <linux/fs.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
36 #include "locking.h"
37
38 struct btrfs_trans_handle;
39 struct btrfs_transaction;
40 struct btrfs_pending_snapshot;
41 struct btrfs_delayed_ref_root;
42 struct btrfs_space_info;
43 struct btrfs_block_group;
44 extern struct kmem_cache *btrfs_trans_handle_cachep;
45 extern struct kmem_cache *btrfs_bit_radix_cachep;
46 extern struct kmem_cache *btrfs_path_cachep;
47 extern struct kmem_cache *btrfs_free_space_cachep;
48 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
49 struct btrfs_ordered_sum;
50 struct btrfs_ref;
51
52 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
53
54 /*
55 * Maximum number of mirrors that can be available for all profiles counting
56 * the target device of dev-replace as one. During an active device replace
57 * procedure, the target device of the copy operation is a mirror for the
58 * filesystem data as well that can be used to read data in order to repair
59 * read errors on other disks.
60 *
61 * Current value is derived from RAID1C4 with 4 copies.
62 */
63 #define BTRFS_MAX_MIRRORS (4 + 1)
64
65 #define BTRFS_MAX_LEVEL 8
66
67 #define BTRFS_OLDEST_GENERATION 0ULL
68
69 /*
70 * the max metadata block size. This limit is somewhat artificial,
71 * but the memmove costs go through the roof for larger blocks.
72 */
73 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
74
75 /*
76 * we can actually store much bigger names, but lets not confuse the rest
77 * of linux
78 */
79 #define BTRFS_NAME_LEN 255
80
81 /*
82 * Theoretical limit is larger, but we keep this down to a sane
83 * value. That should limit greatly the possibility of collisions on
84 * inode ref items.
85 */
86 #define BTRFS_LINK_MAX 65535U
87
88 #define BTRFS_EMPTY_DIR_SIZE 0
89
90 /* ioprio of readahead is set to idle */
91 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
92
93 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
94
95 /*
96 * Use large batch size to reduce overhead of metadata updates. On the reader
97 * side, we only read it when we are close to ENOSPC and the read overhead is
98 * mostly related to the number of CPUs, so it is OK to use arbitrary large
99 * value here.
100 */
101 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
102
103 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
104
105 /*
106 * Deltas are an effective way to populate global statistics. Give macro names
107 * to make it clear what we're doing. An example is discard_extents in
108 * btrfs_free_space_ctl.
109 */
110 #define BTRFS_STAT_NR_ENTRIES 2
111 #define BTRFS_STAT_CURR 0
112 #define BTRFS_STAT_PREV 1
113
114 /*
115 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
116 */
count_max_extents(u64 size)117 static inline u32 count_max_extents(u64 size)
118 {
119 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
120 }
121
btrfs_chunk_item_size(int num_stripes)122 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
123 {
124 BUG_ON(num_stripes == 0);
125 return sizeof(struct btrfs_chunk) +
126 sizeof(struct btrfs_stripe) * (num_stripes - 1);
127 }
128
129 /*
130 * Runtime (in-memory) states of filesystem
131 */
132 enum {
133 /* Global indicator of serious filesystem errors */
134 BTRFS_FS_STATE_ERROR,
135 /*
136 * Filesystem is being remounted, allow to skip some operations, like
137 * defrag
138 */
139 BTRFS_FS_STATE_REMOUNTING,
140 /* Track if a transaction abort has been reported on this filesystem */
141 BTRFS_FS_STATE_TRANS_ABORTED,
142 /*
143 * Bio operations should be blocked on this filesystem because a source
144 * or target device is being destroyed as part of a device replace
145 */
146 BTRFS_FS_STATE_DEV_REPLACING,
147 /* The btrfs_fs_info created for self-tests */
148 BTRFS_FS_STATE_DUMMY_FS_INFO,
149 };
150
151 #define BTRFS_BACKREF_REV_MAX 256
152 #define BTRFS_BACKREF_REV_SHIFT 56
153 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
154 BTRFS_BACKREF_REV_SHIFT)
155
156 #define BTRFS_OLD_BACKREF_REV 0
157 #define BTRFS_MIXED_BACKREF_REV 1
158
159 /*
160 * every tree block (leaf or node) starts with this header.
161 */
162 struct btrfs_header {
163 /* these first four must match the super block */
164 u8 csum[BTRFS_CSUM_SIZE];
165 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
166 __le64 bytenr; /* which block this node is supposed to live in */
167 __le64 flags;
168
169 /* allowed to be different from the super from here on down */
170 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
171 __le64 generation;
172 __le64 owner;
173 __le32 nritems;
174 u8 level;
175 } __attribute__ ((__packed__));
176
177 /*
178 * this is a very generous portion of the super block, giving us
179 * room to translate 14 chunks with 3 stripes each.
180 */
181 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
182
183 /*
184 * just in case we somehow lose the roots and are not able to mount,
185 * we store an array of the roots from previous transactions
186 * in the super.
187 */
188 #define BTRFS_NUM_BACKUP_ROOTS 4
189 struct btrfs_root_backup {
190 __le64 tree_root;
191 __le64 tree_root_gen;
192
193 __le64 chunk_root;
194 __le64 chunk_root_gen;
195
196 __le64 extent_root;
197 __le64 extent_root_gen;
198
199 __le64 fs_root;
200 __le64 fs_root_gen;
201
202 __le64 dev_root;
203 __le64 dev_root_gen;
204
205 __le64 csum_root;
206 __le64 csum_root_gen;
207
208 __le64 total_bytes;
209 __le64 bytes_used;
210 __le64 num_devices;
211 /* future */
212 __le64 unused_64[4];
213
214 u8 tree_root_level;
215 u8 chunk_root_level;
216 u8 extent_root_level;
217 u8 fs_root_level;
218 u8 dev_root_level;
219 u8 csum_root_level;
220 /* future and to align */
221 u8 unused_8[10];
222 } __attribute__ ((__packed__));
223
224 /*
225 * the super block basically lists the main trees of the FS
226 * it currently lacks any block count etc etc
227 */
228 struct btrfs_super_block {
229 /* the first 4 fields must match struct btrfs_header */
230 u8 csum[BTRFS_CSUM_SIZE];
231 /* FS specific UUID, visible to user */
232 u8 fsid[BTRFS_FSID_SIZE];
233 __le64 bytenr; /* this block number */
234 __le64 flags;
235
236 /* allowed to be different from the btrfs_header from here own down */
237 __le64 magic;
238 __le64 generation;
239 __le64 root;
240 __le64 chunk_root;
241 __le64 log_root;
242
243 /* this will help find the new super based on the log root */
244 __le64 log_root_transid;
245 __le64 total_bytes;
246 __le64 bytes_used;
247 __le64 root_dir_objectid;
248 __le64 num_devices;
249 __le32 sectorsize;
250 __le32 nodesize;
251 __le32 __unused_leafsize;
252 __le32 stripesize;
253 __le32 sys_chunk_array_size;
254 __le64 chunk_root_generation;
255 __le64 compat_flags;
256 __le64 compat_ro_flags;
257 __le64 incompat_flags;
258 __le16 csum_type;
259 u8 root_level;
260 u8 chunk_root_level;
261 u8 log_root_level;
262 struct btrfs_dev_item dev_item;
263
264 char label[BTRFS_LABEL_SIZE];
265
266 __le64 cache_generation;
267 __le64 uuid_tree_generation;
268
269 /* the UUID written into btree blocks */
270 u8 metadata_uuid[BTRFS_FSID_SIZE];
271
272 /* future expansion */
273 __le64 reserved[28];
274 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
275 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
276 } __attribute__ ((__packed__));
277
278 /*
279 * Compat flags that we support. If any incompat flags are set other than the
280 * ones specified below then we will fail to mount
281 */
282 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
283 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
284 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
285
286 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
287 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
288 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
289
290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
292
293 #define BTRFS_FEATURE_INCOMPAT_SUPP \
294 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
295 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
296 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
297 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
298 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
299 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
300 BTRFS_FEATURE_INCOMPAT_RAID56 | \
301 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
302 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
303 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
304 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
305 BTRFS_FEATURE_INCOMPAT_RAID1C34)
306
307 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
308 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
309 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
310
311 /*
312 * A leaf is full of items. offset and size tell us where to find
313 * the item in the leaf (relative to the start of the data area)
314 */
315 struct btrfs_item {
316 struct btrfs_disk_key key;
317 __le32 offset;
318 __le32 size;
319 } __attribute__ ((__packed__));
320
321 /*
322 * leaves have an item area and a data area:
323 * [item0, item1....itemN] [free space] [dataN...data1, data0]
324 *
325 * The data is separate from the items to get the keys closer together
326 * during searches.
327 */
328 struct btrfs_leaf {
329 struct btrfs_header header;
330 struct btrfs_item items[];
331 } __attribute__ ((__packed__));
332
333 /*
334 * all non-leaf blocks are nodes, they hold only keys and pointers to
335 * other blocks
336 */
337 struct btrfs_key_ptr {
338 struct btrfs_disk_key key;
339 __le64 blockptr;
340 __le64 generation;
341 } __attribute__ ((__packed__));
342
343 struct btrfs_node {
344 struct btrfs_header header;
345 struct btrfs_key_ptr ptrs[];
346 } __attribute__ ((__packed__));
347
348 /*
349 * btrfs_paths remember the path taken from the root down to the leaf.
350 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
351 * to any other levels that are present.
352 *
353 * The slots array records the index of the item or block pointer
354 * used while walking the tree.
355 */
356 enum { READA_NONE, READA_BACK, READA_FORWARD };
357 struct btrfs_path {
358 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
359 int slots[BTRFS_MAX_LEVEL];
360 /* if there is real range locking, this locks field will change */
361 u8 locks[BTRFS_MAX_LEVEL];
362 u8 reada;
363 /* keep some upper locks as we walk down */
364 u8 lowest_level;
365
366 /*
367 * set by btrfs_split_item, tells search_slot to keep all locks
368 * and to force calls to keep space in the nodes
369 */
370 unsigned int search_for_split:1;
371 unsigned int keep_locks:1;
372 unsigned int skip_locking:1;
373 unsigned int leave_spinning:1;
374 unsigned int search_commit_root:1;
375 unsigned int need_commit_sem:1;
376 unsigned int skip_release_on_error:1;
377 unsigned int recurse:1;
378 };
379 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
380 sizeof(struct btrfs_item))
381 struct btrfs_dev_replace {
382 u64 replace_state; /* see #define above */
383 time64_t time_started; /* seconds since 1-Jan-1970 */
384 time64_t time_stopped; /* seconds since 1-Jan-1970 */
385 atomic64_t num_write_errors;
386 atomic64_t num_uncorrectable_read_errors;
387
388 u64 cursor_left;
389 u64 committed_cursor_left;
390 u64 cursor_left_last_write_of_item;
391 u64 cursor_right;
392
393 u64 cont_reading_from_srcdev_mode; /* see #define above */
394
395 int is_valid;
396 int item_needs_writeback;
397 struct btrfs_device *srcdev;
398 struct btrfs_device *tgtdev;
399
400 struct mutex lock_finishing_cancel_unmount;
401 struct rw_semaphore rwsem;
402
403 struct btrfs_scrub_progress scrub_progress;
404
405 struct percpu_counter bio_counter;
406 wait_queue_head_t replace_wait;
407 };
408
409 /*
410 * free clusters are used to claim free space in relatively large chunks,
411 * allowing us to do less seeky writes. They are used for all metadata
412 * allocations. In ssd_spread mode they are also used for data allocations.
413 */
414 struct btrfs_free_cluster {
415 spinlock_t lock;
416 spinlock_t refill_lock;
417 struct rb_root root;
418
419 /* largest extent in this cluster */
420 u64 max_size;
421
422 /* first extent starting offset */
423 u64 window_start;
424
425 /* We did a full search and couldn't create a cluster */
426 bool fragmented;
427
428 struct btrfs_block_group *block_group;
429 /*
430 * when a cluster is allocated from a block group, we put the
431 * cluster onto a list in the block group so that it can
432 * be freed before the block group is freed.
433 */
434 struct list_head block_group_list;
435 };
436
437 enum btrfs_caching_type {
438 BTRFS_CACHE_NO,
439 BTRFS_CACHE_STARTED,
440 BTRFS_CACHE_FAST,
441 BTRFS_CACHE_FINISHED,
442 BTRFS_CACHE_ERROR,
443 };
444
445 /*
446 * Tree to record all locked full stripes of a RAID5/6 block group
447 */
448 struct btrfs_full_stripe_locks_tree {
449 struct rb_root root;
450 struct mutex lock;
451 };
452
453 /* Discard control. */
454 /*
455 * Async discard uses multiple lists to differentiate the discard filter
456 * parameters. Index 0 is for completely free block groups where we need to
457 * ensure the entire block group is trimmed without being lossy. Indices
458 * afterwards represent monotonically decreasing discard filter sizes to
459 * prioritize what should be discarded next.
460 */
461 #define BTRFS_NR_DISCARD_LISTS 3
462 #define BTRFS_DISCARD_INDEX_UNUSED 0
463 #define BTRFS_DISCARD_INDEX_START 1
464
465 struct btrfs_discard_ctl {
466 struct workqueue_struct *discard_workers;
467 struct delayed_work work;
468 spinlock_t lock;
469 struct btrfs_block_group *block_group;
470 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
471 u64 prev_discard;
472 atomic_t discardable_extents;
473 atomic64_t discardable_bytes;
474 u64 max_discard_size;
475 unsigned long delay;
476 u32 iops_limit;
477 u32 kbps_limit;
478 u64 discard_extent_bytes;
479 u64 discard_bitmap_bytes;
480 atomic64_t discard_bytes_saved;
481 };
482
483 /* delayed seq elem */
484 struct seq_list {
485 struct list_head list;
486 u64 seq;
487 };
488
489 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
490
491 #define SEQ_LAST ((u64)-1)
492
493 enum btrfs_orphan_cleanup_state {
494 ORPHAN_CLEANUP_STARTED = 1,
495 ORPHAN_CLEANUP_DONE = 2,
496 };
497
498 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
499
500 /* fs_info */
501 struct reloc_control;
502 struct btrfs_device;
503 struct btrfs_fs_devices;
504 struct btrfs_balance_control;
505 struct btrfs_delayed_root;
506
507 /*
508 * Block group or device which contains an active swapfile. Used for preventing
509 * unsafe operations while a swapfile is active.
510 *
511 * These are sorted on (ptr, inode) (note that a block group or device can
512 * contain more than one swapfile). We compare the pointer values because we
513 * don't actually care what the object is, we just need a quick check whether
514 * the object exists in the rbtree.
515 */
516 struct btrfs_swapfile_pin {
517 struct rb_node node;
518 void *ptr;
519 struct inode *inode;
520 /*
521 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
522 * points to a struct btrfs_device.
523 */
524 bool is_block_group;
525 /*
526 * Only used when 'is_block_group' is true and it is the number of
527 * extents used by a swapfile for this block group ('ptr' field).
528 */
529 int bg_extent_count;
530 };
531
532 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
533
534 enum {
535 BTRFS_FS_BARRIER,
536 BTRFS_FS_CLOSING_START,
537 BTRFS_FS_CLOSING_DONE,
538 BTRFS_FS_LOG_RECOVERING,
539 BTRFS_FS_OPEN,
540 BTRFS_FS_QUOTA_ENABLED,
541 BTRFS_FS_UPDATE_UUID_TREE_GEN,
542 BTRFS_FS_CREATING_FREE_SPACE_TREE,
543 BTRFS_FS_BTREE_ERR,
544 BTRFS_FS_LOG1_ERR,
545 BTRFS_FS_LOG2_ERR,
546 BTRFS_FS_QUOTA_OVERRIDE,
547 /* Used to record internally whether fs has been frozen */
548 BTRFS_FS_FROZEN,
549 /*
550 * Indicate that balance has been set up from the ioctl and is in the
551 * main phase. The fs_info::balance_ctl is initialized.
552 * Set and cleared while holding fs_info::balance_mutex.
553 */
554 BTRFS_FS_BALANCE_RUNNING,
555
556 /* Indicate that the cleaner thread is awake and doing something. */
557 BTRFS_FS_CLEANER_RUNNING,
558
559 /*
560 * The checksumming has an optimized version and is considered fast,
561 * so we don't need to offload checksums to workqueues.
562 */
563 BTRFS_FS_CSUM_IMPL_FAST,
564
565 /* Indicate that the discard workqueue can service discards. */
566 BTRFS_FS_DISCARD_RUNNING,
567
568 /* Indicate that we can't trust the free space tree for caching yet */
569 BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED,
570 };
571
572 /*
573 * Exclusive operations (device replace, resize, device add/remove, balance)
574 */
575 enum btrfs_exclusive_operation {
576 BTRFS_EXCLOP_NONE,
577 BTRFS_EXCLOP_BALANCE,
578 BTRFS_EXCLOP_DEV_ADD,
579 BTRFS_EXCLOP_DEV_REMOVE,
580 BTRFS_EXCLOP_DEV_REPLACE,
581 BTRFS_EXCLOP_RESIZE,
582 BTRFS_EXCLOP_SWAP_ACTIVATE,
583 };
584
585 struct btrfs_fs_info {
586 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
587 unsigned long flags;
588 struct btrfs_root *extent_root;
589 struct btrfs_root *tree_root;
590 struct btrfs_root *chunk_root;
591 struct btrfs_root *dev_root;
592 struct btrfs_root *fs_root;
593 struct btrfs_root *csum_root;
594 struct btrfs_root *quota_root;
595 struct btrfs_root *uuid_root;
596 struct btrfs_root *free_space_root;
597 struct btrfs_root *data_reloc_root;
598
599 /* the log root tree is a directory of all the other log roots */
600 struct btrfs_root *log_root_tree;
601
602 spinlock_t fs_roots_radix_lock;
603 struct radix_tree_root fs_roots_radix;
604
605 /* block group cache stuff */
606 spinlock_t block_group_cache_lock;
607 u64 first_logical_byte;
608 struct rb_root block_group_cache_tree;
609
610 /* keep track of unallocated space */
611 atomic64_t free_chunk_space;
612
613 /* Track ranges which are used by log trees blocks/logged data extents */
614 struct extent_io_tree excluded_extents;
615
616 /* logical->physical extent mapping */
617 struct extent_map_tree mapping_tree;
618
619 /*
620 * block reservation for extent, checksum, root tree and
621 * delayed dir index item
622 */
623 struct btrfs_block_rsv global_block_rsv;
624 /* block reservation for metadata operations */
625 struct btrfs_block_rsv trans_block_rsv;
626 /* block reservation for chunk tree */
627 struct btrfs_block_rsv chunk_block_rsv;
628 /* block reservation for delayed operations */
629 struct btrfs_block_rsv delayed_block_rsv;
630 /* block reservation for delayed refs */
631 struct btrfs_block_rsv delayed_refs_rsv;
632
633 struct btrfs_block_rsv empty_block_rsv;
634
635 u64 generation;
636 u64 last_trans_committed;
637 u64 avg_delayed_ref_runtime;
638
639 /*
640 * this is updated to the current trans every time a full commit
641 * is required instead of the faster short fsync log commits
642 */
643 u64 last_trans_log_full_commit;
644 unsigned long mount_opt;
645 /*
646 * Track requests for actions that need to be done during transaction
647 * commit (like for some mount options).
648 */
649 unsigned long pending_changes;
650 unsigned long compress_type:4;
651 unsigned int compress_level;
652 u32 commit_interval;
653 /*
654 * It is a suggestive number, the read side is safe even it gets a
655 * wrong number because we will write out the data into a regular
656 * extent. The write side(mount/remount) is under ->s_umount lock,
657 * so it is also safe.
658 */
659 u64 max_inline;
660
661 struct btrfs_transaction *running_transaction;
662 wait_queue_head_t transaction_throttle;
663 wait_queue_head_t transaction_wait;
664 wait_queue_head_t transaction_blocked_wait;
665 wait_queue_head_t async_submit_wait;
666
667 /*
668 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
669 * when they are updated.
670 *
671 * Because we do not clear the flags for ever, so we needn't use
672 * the lock on the read side.
673 *
674 * We also needn't use the lock when we mount the fs, because
675 * there is no other task which will update the flag.
676 */
677 spinlock_t super_lock;
678 struct btrfs_super_block *super_copy;
679 struct btrfs_super_block *super_for_commit;
680 struct super_block *sb;
681 struct inode *btree_inode;
682 struct mutex tree_log_mutex;
683 struct mutex transaction_kthread_mutex;
684 struct mutex cleaner_mutex;
685 struct mutex chunk_mutex;
686
687 /*
688 * this is taken to make sure we don't set block groups ro after
689 * the free space cache has been allocated on them
690 */
691 struct mutex ro_block_group_mutex;
692
693 /* this is used during read/modify/write to make sure
694 * no two ios are trying to mod the same stripe at the same
695 * time
696 */
697 struct btrfs_stripe_hash_table *stripe_hash_table;
698
699 /*
700 * this protects the ordered operations list only while we are
701 * processing all of the entries on it. This way we make
702 * sure the commit code doesn't find the list temporarily empty
703 * because another function happens to be doing non-waiting preflush
704 * before jumping into the main commit.
705 */
706 struct mutex ordered_operations_mutex;
707
708 struct rw_semaphore commit_root_sem;
709
710 struct rw_semaphore cleanup_work_sem;
711
712 struct rw_semaphore subvol_sem;
713
714 spinlock_t trans_lock;
715 /*
716 * the reloc mutex goes with the trans lock, it is taken
717 * during commit to protect us from the relocation code
718 */
719 struct mutex reloc_mutex;
720
721 struct list_head trans_list;
722 struct list_head dead_roots;
723 struct list_head caching_block_groups;
724
725 spinlock_t delayed_iput_lock;
726 struct list_head delayed_iputs;
727 atomic_t nr_delayed_iputs;
728 wait_queue_head_t delayed_iputs_wait;
729
730 atomic64_t tree_mod_seq;
731
732 /* this protects tree_mod_log and tree_mod_seq_list */
733 rwlock_t tree_mod_log_lock;
734 struct rb_root tree_mod_log;
735 struct list_head tree_mod_seq_list;
736
737 atomic_t async_delalloc_pages;
738
739 /*
740 * this is used to protect the following list -- ordered_roots.
741 */
742 spinlock_t ordered_root_lock;
743
744 /*
745 * all fs/file tree roots in which there are data=ordered extents
746 * pending writeback are added into this list.
747 *
748 * these can span multiple transactions and basically include
749 * every dirty data page that isn't from nodatacow
750 */
751 struct list_head ordered_roots;
752
753 struct mutex delalloc_root_mutex;
754 spinlock_t delalloc_root_lock;
755 /* all fs/file tree roots that have delalloc inodes. */
756 struct list_head delalloc_roots;
757
758 /*
759 * there is a pool of worker threads for checksumming during writes
760 * and a pool for checksumming after reads. This is because readers
761 * can run with FS locks held, and the writers may be waiting for
762 * those locks. We don't want ordering in the pending list to cause
763 * deadlocks, and so the two are serviced separately.
764 *
765 * A third pool does submit_bio to avoid deadlocking with the other
766 * two
767 */
768 struct btrfs_workqueue *workers;
769 struct btrfs_workqueue *delalloc_workers;
770 struct btrfs_workqueue *flush_workers;
771 struct btrfs_workqueue *endio_workers;
772 struct btrfs_workqueue *endio_meta_workers;
773 struct btrfs_workqueue *endio_raid56_workers;
774 struct btrfs_workqueue *rmw_workers;
775 struct btrfs_workqueue *endio_meta_write_workers;
776 struct btrfs_workqueue *endio_write_workers;
777 struct btrfs_workqueue *endio_freespace_worker;
778 struct btrfs_workqueue *caching_workers;
779 struct btrfs_workqueue *readahead_workers;
780
781 /*
782 * fixup workers take dirty pages that didn't properly go through
783 * the cow mechanism and make them safe to write. It happens
784 * for the sys_munmap function call path
785 */
786 struct btrfs_workqueue *fixup_workers;
787 struct btrfs_workqueue *delayed_workers;
788
789 struct task_struct *transaction_kthread;
790 struct task_struct *cleaner_kthread;
791 u32 thread_pool_size;
792
793 struct kobject *space_info_kobj;
794 struct kobject *qgroups_kobj;
795
796 u64 total_pinned;
797
798 /* used to keep from writing metadata until there is a nice batch */
799 struct percpu_counter dirty_metadata_bytes;
800 struct percpu_counter delalloc_bytes;
801 struct percpu_counter dio_bytes;
802 s32 dirty_metadata_batch;
803 s32 delalloc_batch;
804
805 struct list_head dirty_cowonly_roots;
806
807 struct btrfs_fs_devices *fs_devices;
808
809 /*
810 * The space_info list is effectively read only after initial
811 * setup. It is populated at mount time and cleaned up after
812 * all block groups are removed. RCU is used to protect it.
813 */
814 struct list_head space_info;
815
816 struct btrfs_space_info *data_sinfo;
817
818 struct reloc_control *reloc_ctl;
819
820 /* data_alloc_cluster is only used in ssd_spread mode */
821 struct btrfs_free_cluster data_alloc_cluster;
822
823 /* all metadata allocations go through this cluster */
824 struct btrfs_free_cluster meta_alloc_cluster;
825
826 /* auto defrag inodes go here */
827 spinlock_t defrag_inodes_lock;
828 struct rb_root defrag_inodes;
829 atomic_t defrag_running;
830
831 /* Used to protect avail_{data, metadata, system}_alloc_bits */
832 seqlock_t profiles_lock;
833 /*
834 * these three are in extended format (availability of single
835 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
836 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
837 */
838 u64 avail_data_alloc_bits;
839 u64 avail_metadata_alloc_bits;
840 u64 avail_system_alloc_bits;
841
842 /* restriper state */
843 spinlock_t balance_lock;
844 struct mutex balance_mutex;
845 atomic_t balance_pause_req;
846 atomic_t balance_cancel_req;
847 struct btrfs_balance_control *balance_ctl;
848 wait_queue_head_t balance_wait_q;
849
850 u32 data_chunk_allocations;
851 u32 metadata_ratio;
852
853 void *bdev_holder;
854
855 /* private scrub information */
856 struct mutex scrub_lock;
857 atomic_t scrubs_running;
858 atomic_t scrub_pause_req;
859 atomic_t scrubs_paused;
860 atomic_t scrub_cancel_req;
861 wait_queue_head_t scrub_pause_wait;
862 /*
863 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
864 * running.
865 */
866 refcount_t scrub_workers_refcnt;
867 struct btrfs_workqueue *scrub_workers;
868 struct btrfs_workqueue *scrub_wr_completion_workers;
869 struct btrfs_workqueue *scrub_parity_workers;
870
871 struct btrfs_discard_ctl discard_ctl;
872
873 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
874 u32 check_integrity_print_mask;
875 #endif
876 /* is qgroup tracking in a consistent state? */
877 u64 qgroup_flags;
878
879 /* holds configuration and tracking. Protected by qgroup_lock */
880 struct rb_root qgroup_tree;
881 spinlock_t qgroup_lock;
882
883 /*
884 * used to avoid frequently calling ulist_alloc()/ulist_free()
885 * when doing qgroup accounting, it must be protected by qgroup_lock.
886 */
887 struct ulist *qgroup_ulist;
888
889 /*
890 * Protect user change for quota operations. If a transaction is needed,
891 * it must be started before locking this lock.
892 */
893 struct mutex qgroup_ioctl_lock;
894
895 /* list of dirty qgroups to be written at next commit */
896 struct list_head dirty_qgroups;
897
898 /* used by qgroup for an efficient tree traversal */
899 u64 qgroup_seq;
900
901 /* qgroup rescan items */
902 struct mutex qgroup_rescan_lock; /* protects the progress item */
903 struct btrfs_key qgroup_rescan_progress;
904 struct btrfs_workqueue *qgroup_rescan_workers;
905 struct completion qgroup_rescan_completion;
906 struct btrfs_work qgroup_rescan_work;
907 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
908
909 /* filesystem state */
910 unsigned long fs_state;
911
912 struct btrfs_delayed_root *delayed_root;
913
914 /* readahead tree */
915 spinlock_t reada_lock;
916 struct radix_tree_root reada_tree;
917
918 /* readahead works cnt */
919 atomic_t reada_works_cnt;
920
921 /* Extent buffer radix tree */
922 spinlock_t buffer_lock;
923 struct radix_tree_root buffer_radix;
924
925 /* next backup root to be overwritten */
926 int backup_root_index;
927
928 /* device replace state */
929 struct btrfs_dev_replace dev_replace;
930
931 struct semaphore uuid_tree_rescan_sem;
932
933 /* Used to reclaim the metadata space in the background. */
934 struct work_struct async_reclaim_work;
935 struct work_struct async_data_reclaim_work;
936
937 spinlock_t unused_bgs_lock;
938 struct list_head unused_bgs;
939 struct mutex unused_bg_unpin_mutex;
940 struct mutex delete_unused_bgs_mutex;
941
942 /* Cached block sizes */
943 u32 nodesize;
944 u32 sectorsize;
945 u32 stripesize;
946
947 /* Block groups and devices containing active swapfiles. */
948 spinlock_t swapfile_pins_lock;
949 struct rb_root swapfile_pins;
950
951 struct crypto_shash *csum_shash;
952
953 /*
954 * Number of send operations in progress.
955 * Updated while holding fs_info::balance_mutex.
956 */
957 int send_in_progress;
958
959 /* Type of exclusive operation running */
960 unsigned long exclusive_operation;
961
962 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
963 spinlock_t ref_verify_lock;
964 struct rb_root block_tree;
965 #endif
966
967 #ifdef CONFIG_BTRFS_DEBUG
968 struct kobject *debug_kobj;
969 struct kobject *discard_debug_kobj;
970 struct list_head allocated_roots;
971
972 spinlock_t eb_leak_lock;
973 struct list_head allocated_ebs;
974 #endif
975 };
976
btrfs_sb(struct super_block * sb)977 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
978 {
979 return sb->s_fs_info;
980 }
981
982 /*
983 * The state of btrfs root
984 */
985 enum {
986 /*
987 * btrfs_record_root_in_trans is a multi-step process, and it can race
988 * with the balancing code. But the race is very small, and only the
989 * first time the root is added to each transaction. So IN_TRANS_SETUP
990 * is used to tell us when more checks are required
991 */
992 BTRFS_ROOT_IN_TRANS_SETUP,
993
994 /*
995 * Set if tree blocks of this root can be shared by other roots.
996 * Only subvolume trees and their reloc trees have this bit set.
997 * Conflicts with TRACK_DIRTY bit.
998 *
999 * This affects two things:
1000 *
1001 * - How balance works
1002 * For shareable roots, we need to use reloc tree and do path
1003 * replacement for balance, and need various pre/post hooks for
1004 * snapshot creation to handle them.
1005 *
1006 * While for non-shareable trees, we just simply do a tree search
1007 * with COW.
1008 *
1009 * - How dirty roots are tracked
1010 * For shareable roots, btrfs_record_root_in_trans() is needed to
1011 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1012 * don't need to set this manually.
1013 */
1014 BTRFS_ROOT_SHAREABLE,
1015 BTRFS_ROOT_TRACK_DIRTY,
1016 BTRFS_ROOT_IN_RADIX,
1017 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1018 BTRFS_ROOT_DEFRAG_RUNNING,
1019 BTRFS_ROOT_FORCE_COW,
1020 BTRFS_ROOT_MULTI_LOG_TASKS,
1021 BTRFS_ROOT_DIRTY,
1022 BTRFS_ROOT_DELETING,
1023
1024 /*
1025 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1026 *
1027 * Set for the subvolume tree owning the reloc tree.
1028 */
1029 BTRFS_ROOT_DEAD_RELOC_TREE,
1030 /* Mark dead root stored on device whose cleanup needs to be resumed */
1031 BTRFS_ROOT_DEAD_TREE,
1032 /* The root has a log tree. Used only for subvolume roots. */
1033 BTRFS_ROOT_HAS_LOG_TREE,
1034 /* Qgroup flushing is in progress */
1035 BTRFS_ROOT_QGROUP_FLUSHING,
1036 };
1037
1038 /*
1039 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1040 * code. For detail check comment in fs/btrfs/qgroup.c.
1041 */
1042 struct btrfs_qgroup_swapped_blocks {
1043 spinlock_t lock;
1044 /* RM_EMPTY_ROOT() of above blocks[] */
1045 bool swapped;
1046 struct rb_root blocks[BTRFS_MAX_LEVEL];
1047 };
1048
1049 /*
1050 * in ram representation of the tree. extent_root is used for all allocations
1051 * and for the extent tree extent_root root.
1052 */
1053 struct btrfs_root {
1054 struct extent_buffer *node;
1055
1056 struct extent_buffer *commit_root;
1057 struct btrfs_root *log_root;
1058 struct btrfs_root *reloc_root;
1059
1060 unsigned long state;
1061 struct btrfs_root_item root_item;
1062 struct btrfs_key root_key;
1063 struct btrfs_fs_info *fs_info;
1064 struct extent_io_tree dirty_log_pages;
1065
1066 struct mutex objectid_mutex;
1067
1068 spinlock_t accounting_lock;
1069 struct btrfs_block_rsv *block_rsv;
1070
1071 /* free ino cache stuff */
1072 struct btrfs_free_space_ctl *free_ino_ctl;
1073 enum btrfs_caching_type ino_cache_state;
1074 spinlock_t ino_cache_lock;
1075 wait_queue_head_t ino_cache_wait;
1076 struct btrfs_free_space_ctl *free_ino_pinned;
1077 u64 ino_cache_progress;
1078 struct inode *ino_cache_inode;
1079
1080 struct mutex log_mutex;
1081 wait_queue_head_t log_writer_wait;
1082 wait_queue_head_t log_commit_wait[2];
1083 struct list_head log_ctxs[2];
1084 /* Used only for log trees of subvolumes, not for the log root tree */
1085 atomic_t log_writers;
1086 atomic_t log_commit[2];
1087 /* Used only for log trees of subvolumes, not for the log root tree */
1088 atomic_t log_batch;
1089 int log_transid;
1090 /* No matter the commit succeeds or not*/
1091 int log_transid_committed;
1092 /* Just be updated when the commit succeeds. */
1093 int last_log_commit;
1094 pid_t log_start_pid;
1095
1096 u64 last_trans;
1097
1098 u32 type;
1099
1100 u64 highest_objectid;
1101
1102 struct btrfs_key defrag_progress;
1103 struct btrfs_key defrag_max;
1104
1105 /* The dirty list is only used by non-shareable roots */
1106 struct list_head dirty_list;
1107
1108 struct list_head root_list;
1109
1110 spinlock_t log_extents_lock[2];
1111 struct list_head logged_list[2];
1112
1113 int orphan_cleanup_state;
1114
1115 spinlock_t inode_lock;
1116 /* red-black tree that keeps track of in-memory inodes */
1117 struct rb_root inode_tree;
1118
1119 /*
1120 * radix tree that keeps track of delayed nodes of every inode,
1121 * protected by inode_lock
1122 */
1123 struct radix_tree_root delayed_nodes_tree;
1124 /*
1125 * right now this just gets used so that a root has its own devid
1126 * for stat. It may be used for more later
1127 */
1128 dev_t anon_dev;
1129
1130 spinlock_t root_item_lock;
1131 refcount_t refs;
1132
1133 struct mutex delalloc_mutex;
1134 spinlock_t delalloc_lock;
1135 /*
1136 * all of the inodes that have delalloc bytes. It is possible for
1137 * this list to be empty even when there is still dirty data=ordered
1138 * extents waiting to finish IO.
1139 */
1140 struct list_head delalloc_inodes;
1141 struct list_head delalloc_root;
1142 u64 nr_delalloc_inodes;
1143
1144 struct mutex ordered_extent_mutex;
1145 /*
1146 * this is used by the balancing code to wait for all the pending
1147 * ordered extents
1148 */
1149 spinlock_t ordered_extent_lock;
1150
1151 /*
1152 * all of the data=ordered extents pending writeback
1153 * these can span multiple transactions and basically include
1154 * every dirty data page that isn't from nodatacow
1155 */
1156 struct list_head ordered_extents;
1157 struct list_head ordered_root;
1158 u64 nr_ordered_extents;
1159
1160 /*
1161 * Not empty if this subvolume root has gone through tree block swap
1162 * (relocation)
1163 *
1164 * Will be used by reloc_control::dirty_subvol_roots.
1165 */
1166 struct list_head reloc_dirty_list;
1167
1168 /*
1169 * Number of currently running SEND ioctls to prevent
1170 * manipulation with the read-only status via SUBVOL_SETFLAGS
1171 */
1172 int send_in_progress;
1173 /*
1174 * Number of currently running deduplication operations that have a
1175 * destination inode belonging to this root. Protected by the lock
1176 * root_item_lock.
1177 */
1178 int dedupe_in_progress;
1179 /* For exclusion of snapshot creation and nocow writes */
1180 struct btrfs_drew_lock snapshot_lock;
1181
1182 atomic_t snapshot_force_cow;
1183
1184 /* For qgroup metadata reserved space */
1185 spinlock_t qgroup_meta_rsv_lock;
1186 u64 qgroup_meta_rsv_pertrans;
1187 u64 qgroup_meta_rsv_prealloc;
1188 wait_queue_head_t qgroup_flush_wait;
1189
1190 /* Number of active swapfiles */
1191 atomic_t nr_swapfiles;
1192
1193 /* Record pairs of swapped blocks for qgroup */
1194 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1195
1196 /* Used only by log trees, when logging csum items */
1197 struct extent_io_tree log_csum_range;
1198
1199 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1200 u64 alloc_bytenr;
1201 #endif
1202
1203 #ifdef CONFIG_BTRFS_DEBUG
1204 struct list_head leak_list;
1205 #endif
1206 };
1207
1208 /*
1209 * Structure that conveys information about an extent that is going to replace
1210 * all the extents in a file range.
1211 */
1212 struct btrfs_replace_extent_info {
1213 u64 disk_offset;
1214 u64 disk_len;
1215 u64 data_offset;
1216 u64 data_len;
1217 u64 file_offset;
1218 /* Pointer to a file extent item of type regular or prealloc. */
1219 char *extent_buf;
1220 /*
1221 * Set to true when attempting to replace a file range with a new extent
1222 * described by this structure, set to false when attempting to clone an
1223 * existing extent into a file range.
1224 */
1225 bool is_new_extent;
1226 /* Meaningful only if is_new_extent is true. */
1227 int qgroup_reserved;
1228 /*
1229 * Meaningful only if is_new_extent is true.
1230 * Used to track how many extent items we have already inserted in a
1231 * subvolume tree that refer to the extent described by this structure,
1232 * so that we know when to create a new delayed ref or update an existing
1233 * one.
1234 */
1235 int insertions;
1236 };
1237
1238 struct btrfs_file_private {
1239 void *filldir_buf;
1240 };
1241
1242
BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info * info)1243 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1244 {
1245
1246 return info->nodesize - sizeof(struct btrfs_header);
1247 }
1248
1249 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1250
BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info * info)1251 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1252 {
1253 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1254 }
1255
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info * info)1256 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1257 {
1258 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1259 }
1260
1261 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1262 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info * info)1263 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1264 {
1265 return BTRFS_MAX_ITEM_SIZE(info) -
1266 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1267 }
1268
BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info * info)1269 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1270 {
1271 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1272 }
1273
1274 /*
1275 * Flags for mount options.
1276 *
1277 * Note: don't forget to add new options to btrfs_show_options()
1278 */
1279 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1280 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1281 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1282 #define BTRFS_MOUNT_SSD (1 << 3)
1283 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1284 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1285 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1286 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1287 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1288 #define BTRFS_MOUNT_NOSSD (1 << 9)
1289 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1290 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1291 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1292 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1293 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1294 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1295 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1296 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1297 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1298 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1299 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1300 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1301 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1302 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1303 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1304 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1305 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1306 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1307 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1308 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1309
1310 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1311 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1312
1313 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1314 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1315 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1316 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1317 BTRFS_MOUNT_##opt)
1318
1319 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1320 do { \
1321 if (!btrfs_test_opt(fs_info, opt)) \
1322 btrfs_info(fs_info, fmt, ##args); \
1323 btrfs_set_opt(fs_info->mount_opt, opt); \
1324 } while (0)
1325
1326 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1327 do { \
1328 if (btrfs_test_opt(fs_info, opt)) \
1329 btrfs_info(fs_info, fmt, ##args); \
1330 btrfs_clear_opt(fs_info->mount_opt, opt); \
1331 } while (0)
1332
1333 /*
1334 * Requests for changes that need to be done during transaction commit.
1335 *
1336 * Internal mount options that are used for special handling of the real
1337 * mount options (eg. cannot be set during remount and have to be set during
1338 * transaction commit)
1339 */
1340
1341 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1342 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1343 #define BTRFS_PENDING_COMMIT (2)
1344
1345 #define btrfs_test_pending(info, opt) \
1346 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1347 #define btrfs_set_pending(info, opt) \
1348 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1349 #define btrfs_clear_pending(info, opt) \
1350 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1351
1352 /*
1353 * Helpers for setting pending mount option changes.
1354 *
1355 * Expects corresponding macros
1356 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1357 */
1358 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1359 do { \
1360 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1361 btrfs_info((info), fmt, ##args); \
1362 btrfs_set_pending((info), SET_##opt); \
1363 btrfs_clear_pending((info), CLEAR_##opt); \
1364 } \
1365 } while(0)
1366
1367 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1368 do { \
1369 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1370 btrfs_info((info), fmt, ##args); \
1371 btrfs_set_pending((info), CLEAR_##opt); \
1372 btrfs_clear_pending((info), SET_##opt); \
1373 } \
1374 } while(0)
1375
1376 /*
1377 * Inode flags
1378 */
1379 #define BTRFS_INODE_NODATASUM (1 << 0)
1380 #define BTRFS_INODE_NODATACOW (1 << 1)
1381 #define BTRFS_INODE_READONLY (1 << 2)
1382 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1383 #define BTRFS_INODE_PREALLOC (1 << 4)
1384 #define BTRFS_INODE_SYNC (1 << 5)
1385 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1386 #define BTRFS_INODE_APPEND (1 << 7)
1387 #define BTRFS_INODE_NODUMP (1 << 8)
1388 #define BTRFS_INODE_NOATIME (1 << 9)
1389 #define BTRFS_INODE_DIRSYNC (1 << 10)
1390 #define BTRFS_INODE_COMPRESS (1 << 11)
1391
1392 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1393
1394 #define BTRFS_INODE_FLAG_MASK \
1395 (BTRFS_INODE_NODATASUM | \
1396 BTRFS_INODE_NODATACOW | \
1397 BTRFS_INODE_READONLY | \
1398 BTRFS_INODE_NOCOMPRESS | \
1399 BTRFS_INODE_PREALLOC | \
1400 BTRFS_INODE_SYNC | \
1401 BTRFS_INODE_IMMUTABLE | \
1402 BTRFS_INODE_APPEND | \
1403 BTRFS_INODE_NODUMP | \
1404 BTRFS_INODE_NOATIME | \
1405 BTRFS_INODE_DIRSYNC | \
1406 BTRFS_INODE_COMPRESS | \
1407 BTRFS_INODE_ROOT_ITEM_INIT)
1408
1409 struct btrfs_map_token {
1410 struct extent_buffer *eb;
1411 char *kaddr;
1412 unsigned long offset;
1413 };
1414
1415 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1416 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1417
btrfs_init_map_token(struct btrfs_map_token * token,struct extent_buffer * eb)1418 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1419 struct extent_buffer *eb)
1420 {
1421 token->eb = eb;
1422 token->kaddr = page_address(eb->pages[0]);
1423 token->offset = 0;
1424 }
1425
1426 /* some macros to generate set/get functions for the struct fields. This
1427 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1428 * one for u8:
1429 */
1430 #define le8_to_cpu(v) (v)
1431 #define cpu_to_le8(v) (v)
1432 #define __le8 u8
1433
get_unaligned_le8(const void * p)1434 static inline u8 get_unaligned_le8(const void *p)
1435 {
1436 return *(u8 *)p;
1437 }
1438
put_unaligned_le8(u8 val,void * p)1439 static inline void put_unaligned_le8(u8 val, void *p)
1440 {
1441 *(u8 *)p = val;
1442 }
1443
1444 #define read_eb_member(eb, ptr, type, member, result) (\
1445 read_extent_buffer(eb, (char *)(result), \
1446 ((unsigned long)(ptr)) + \
1447 offsetof(type, member), \
1448 sizeof(((type *)0)->member)))
1449
1450 #define write_eb_member(eb, ptr, type, member, result) (\
1451 write_extent_buffer(eb, (char *)(result), \
1452 ((unsigned long)(ptr)) + \
1453 offsetof(type, member), \
1454 sizeof(((type *)0)->member)))
1455
1456 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1457 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1458 const void *ptr, unsigned long off); \
1459 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1460 const void *ptr, unsigned long off, \
1461 u##bits val); \
1462 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1463 const void *ptr, unsigned long off); \
1464 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1465 unsigned long off, u##bits val);
1466
1467 DECLARE_BTRFS_SETGET_BITS(8)
1468 DECLARE_BTRFS_SETGET_BITS(16)
1469 DECLARE_BTRFS_SETGET_BITS(32)
1470 DECLARE_BTRFS_SETGET_BITS(64)
1471
1472 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1473 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1474 const type *s) \
1475 { \
1476 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1477 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1478 } \
1479 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1480 u##bits val) \
1481 { \
1482 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1483 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1484 } \
1485 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1486 const type *s) \
1487 { \
1488 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1489 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1490 } \
1491 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1492 type *s, u##bits val) \
1493 { \
1494 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1495 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1496 }
1497
1498 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1499 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1500 { \
1501 const type *p = page_address(eb->pages[0]); \
1502 return get_unaligned_le##bits(&p->member); \
1503 } \
1504 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1505 u##bits val) \
1506 { \
1507 type *p = page_address(eb->pages[0]); \
1508 put_unaligned_le##bits(val, &p->member); \
1509 }
1510
1511 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1512 static inline u##bits btrfs_##name(const type *s) \
1513 { \
1514 return get_unaligned_le##bits(&s->member); \
1515 } \
1516 static inline void btrfs_set_##name(type *s, u##bits val) \
1517 { \
1518 put_unaligned_le##bits(val, &s->member); \
1519 }
1520
btrfs_device_total_bytes(const struct extent_buffer * eb,struct btrfs_dev_item * s)1521 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1522 struct btrfs_dev_item *s)
1523 {
1524 BUILD_BUG_ON(sizeof(u64) !=
1525 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1526 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1527 total_bytes));
1528 }
btrfs_set_device_total_bytes(const struct extent_buffer * eb,struct btrfs_dev_item * s,u64 val)1529 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1530 struct btrfs_dev_item *s,
1531 u64 val)
1532 {
1533 BUILD_BUG_ON(sizeof(u64) !=
1534 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1535 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1536 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1537 }
1538
1539
1540 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1541 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1542 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1543 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1544 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1545 start_offset, 64);
1546 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1547 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1548 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1549 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1550 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1551 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1552
1553 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1554 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1555 total_bytes, 64);
1556 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1557 bytes_used, 64);
1558 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1559 io_align, 32);
1560 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1561 io_width, 32);
1562 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1563 sector_size, 32);
1564 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1565 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1566 dev_group, 32);
1567 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1568 seek_speed, 8);
1569 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1570 bandwidth, 8);
1571 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1572 generation, 64);
1573
btrfs_device_uuid(struct btrfs_dev_item * d)1574 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1575 {
1576 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1577 }
1578
btrfs_device_fsid(struct btrfs_dev_item * d)1579 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1580 {
1581 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1582 }
1583
1584 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1585 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1586 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1587 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1588 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1589 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1590 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1591 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1592 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1593 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1594 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1595
btrfs_stripe_dev_uuid(struct btrfs_stripe * s)1596 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1597 {
1598 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1599 }
1600
1601 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1602 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1603 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1604 stripe_len, 64);
1605 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1606 io_align, 32);
1607 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1608 io_width, 32);
1609 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1610 sector_size, 32);
1611 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1612 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1613 num_stripes, 16);
1614 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1615 sub_stripes, 16);
1616 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1617 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1618
btrfs_stripe_nr(struct btrfs_chunk * c,int nr)1619 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1620 int nr)
1621 {
1622 unsigned long offset = (unsigned long)c;
1623 offset += offsetof(struct btrfs_chunk, stripe);
1624 offset += nr * sizeof(struct btrfs_stripe);
1625 return (struct btrfs_stripe *)offset;
1626 }
1627
btrfs_stripe_dev_uuid_nr(struct btrfs_chunk * c,int nr)1628 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1629 {
1630 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1631 }
1632
btrfs_stripe_offset_nr(const struct extent_buffer * eb,struct btrfs_chunk * c,int nr)1633 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1634 struct btrfs_chunk *c, int nr)
1635 {
1636 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1637 }
1638
btrfs_stripe_devid_nr(const struct extent_buffer * eb,struct btrfs_chunk * c,int nr)1639 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1640 struct btrfs_chunk *c, int nr)
1641 {
1642 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1643 }
1644
1645 /* struct btrfs_block_group_item */
1646 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1647 used, 64);
1648 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1649 used, 64);
1650 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1651 struct btrfs_block_group_item, chunk_objectid, 64);
1652
1653 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1654 struct btrfs_block_group_item, chunk_objectid, 64);
1655 BTRFS_SETGET_FUNCS(block_group_flags,
1656 struct btrfs_block_group_item, flags, 64);
1657 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1658 struct btrfs_block_group_item, flags, 64);
1659
1660 /* struct btrfs_free_space_info */
1661 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1662 extent_count, 32);
1663 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1664
1665 /* struct btrfs_inode_ref */
1666 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1667 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1668
1669 /* struct btrfs_inode_extref */
1670 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1671 parent_objectid, 64);
1672 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1673 name_len, 16);
1674 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1675
1676 /* struct btrfs_inode_item */
1677 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1678 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1679 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1680 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1681 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1682 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1683 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1684 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1685 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1686 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1687 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1688 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1689 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1690 generation, 64);
1691 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1692 sequence, 64);
1693 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1694 transid, 64);
1695 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1696 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1697 nbytes, 64);
1698 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1699 block_group, 64);
1700 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1701 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1702 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1703 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1704 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1705 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1706 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1707 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1708 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1709 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1710
1711 /* struct btrfs_dev_extent */
1712 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1713 chunk_tree, 64);
1714 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1715 chunk_objectid, 64);
1716 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1717 chunk_offset, 64);
1718 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1719 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1720 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1721 generation, 64);
1722 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1723
1724 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1725
btrfs_tree_block_key(const struct extent_buffer * eb,struct btrfs_tree_block_info * item,struct btrfs_disk_key * key)1726 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1727 struct btrfs_tree_block_info *item,
1728 struct btrfs_disk_key *key)
1729 {
1730 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1731 }
1732
btrfs_set_tree_block_key(const struct extent_buffer * eb,struct btrfs_tree_block_info * item,struct btrfs_disk_key * key)1733 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1734 struct btrfs_tree_block_info *item,
1735 struct btrfs_disk_key *key)
1736 {
1737 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1738 }
1739
1740 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1741 root, 64);
1742 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1743 objectid, 64);
1744 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1745 offset, 64);
1746 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1747 count, 32);
1748
1749 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1750 count, 32);
1751
1752 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1753 type, 8);
1754 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1755 offset, 64);
1756
btrfs_extent_inline_ref_size(int type)1757 static inline u32 btrfs_extent_inline_ref_size(int type)
1758 {
1759 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1760 type == BTRFS_SHARED_BLOCK_REF_KEY)
1761 return sizeof(struct btrfs_extent_inline_ref);
1762 if (type == BTRFS_SHARED_DATA_REF_KEY)
1763 return sizeof(struct btrfs_shared_data_ref) +
1764 sizeof(struct btrfs_extent_inline_ref);
1765 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1766 return sizeof(struct btrfs_extent_data_ref) +
1767 offsetof(struct btrfs_extent_inline_ref, offset);
1768 return 0;
1769 }
1770
1771 /* struct btrfs_node */
1772 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1773 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1774 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1775 blockptr, 64);
1776 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1777 generation, 64);
1778
btrfs_node_blockptr(const struct extent_buffer * eb,int nr)1779 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1780 {
1781 unsigned long ptr;
1782 ptr = offsetof(struct btrfs_node, ptrs) +
1783 sizeof(struct btrfs_key_ptr) * nr;
1784 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1785 }
1786
btrfs_set_node_blockptr(const struct extent_buffer * eb,int nr,u64 val)1787 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1788 int nr, u64 val)
1789 {
1790 unsigned long ptr;
1791 ptr = offsetof(struct btrfs_node, ptrs) +
1792 sizeof(struct btrfs_key_ptr) * nr;
1793 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1794 }
1795
btrfs_node_ptr_generation(const struct extent_buffer * eb,int nr)1796 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1797 {
1798 unsigned long ptr;
1799 ptr = offsetof(struct btrfs_node, ptrs) +
1800 sizeof(struct btrfs_key_ptr) * nr;
1801 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1802 }
1803
btrfs_set_node_ptr_generation(const struct extent_buffer * eb,int nr,u64 val)1804 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1805 int nr, u64 val)
1806 {
1807 unsigned long ptr;
1808 ptr = offsetof(struct btrfs_node, ptrs) +
1809 sizeof(struct btrfs_key_ptr) * nr;
1810 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1811 }
1812
btrfs_node_key_ptr_offset(int nr)1813 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1814 {
1815 return offsetof(struct btrfs_node, ptrs) +
1816 sizeof(struct btrfs_key_ptr) * nr;
1817 }
1818
1819 void btrfs_node_key(const struct extent_buffer *eb,
1820 struct btrfs_disk_key *disk_key, int nr);
1821
btrfs_set_node_key(const struct extent_buffer * eb,struct btrfs_disk_key * disk_key,int nr)1822 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1823 struct btrfs_disk_key *disk_key, int nr)
1824 {
1825 unsigned long ptr;
1826 ptr = btrfs_node_key_ptr_offset(nr);
1827 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1828 struct btrfs_key_ptr, key, disk_key);
1829 }
1830
1831 /* struct btrfs_item */
1832 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1833 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1834 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1835 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1836
btrfs_item_nr_offset(int nr)1837 static inline unsigned long btrfs_item_nr_offset(int nr)
1838 {
1839 return offsetof(struct btrfs_leaf, items) +
1840 sizeof(struct btrfs_item) * nr;
1841 }
1842
btrfs_item_nr(int nr)1843 static inline struct btrfs_item *btrfs_item_nr(int nr)
1844 {
1845 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1846 }
1847
btrfs_item_end(const struct extent_buffer * eb,struct btrfs_item * item)1848 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1849 struct btrfs_item *item)
1850 {
1851 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1852 }
1853
btrfs_item_end_nr(const struct extent_buffer * eb,int nr)1854 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1855 {
1856 return btrfs_item_end(eb, btrfs_item_nr(nr));
1857 }
1858
btrfs_item_offset_nr(const struct extent_buffer * eb,int nr)1859 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1860 {
1861 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1862 }
1863
btrfs_item_size_nr(const struct extent_buffer * eb,int nr)1864 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1865 {
1866 return btrfs_item_size(eb, btrfs_item_nr(nr));
1867 }
1868
btrfs_item_key(const struct extent_buffer * eb,struct btrfs_disk_key * disk_key,int nr)1869 static inline void btrfs_item_key(const struct extent_buffer *eb,
1870 struct btrfs_disk_key *disk_key, int nr)
1871 {
1872 struct btrfs_item *item = btrfs_item_nr(nr);
1873 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1874 }
1875
btrfs_set_item_key(struct extent_buffer * eb,struct btrfs_disk_key * disk_key,int nr)1876 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1877 struct btrfs_disk_key *disk_key, int nr)
1878 {
1879 struct btrfs_item *item = btrfs_item_nr(nr);
1880 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1881 }
1882
1883 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1884
1885 /*
1886 * struct btrfs_root_ref
1887 */
1888 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1889 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1890 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1891
1892 /* struct btrfs_dir_item */
1893 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1894 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1895 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1896 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1897 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1898 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1899 data_len, 16);
1900 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1901 name_len, 16);
1902 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1903 transid, 64);
1904
btrfs_dir_item_key(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_disk_key * key)1905 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1906 const struct btrfs_dir_item *item,
1907 struct btrfs_disk_key *key)
1908 {
1909 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1910 }
1911
btrfs_set_dir_item_key(struct extent_buffer * eb,struct btrfs_dir_item * item,const struct btrfs_disk_key * key)1912 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1913 struct btrfs_dir_item *item,
1914 const struct btrfs_disk_key *key)
1915 {
1916 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1917 }
1918
1919 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1920 num_entries, 64);
1921 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1922 num_bitmaps, 64);
1923 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1924 generation, 64);
1925
btrfs_free_space_key(const struct extent_buffer * eb,const struct btrfs_free_space_header * h,struct btrfs_disk_key * key)1926 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1927 const struct btrfs_free_space_header *h,
1928 struct btrfs_disk_key *key)
1929 {
1930 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1931 }
1932
btrfs_set_free_space_key(struct extent_buffer * eb,struct btrfs_free_space_header * h,const struct btrfs_disk_key * key)1933 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1934 struct btrfs_free_space_header *h,
1935 const struct btrfs_disk_key *key)
1936 {
1937 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1938 }
1939
1940 /* struct btrfs_disk_key */
1941 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1942 objectid, 64);
1943 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1944 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1945
1946 #ifdef __LITTLE_ENDIAN
1947
1948 /*
1949 * Optimized helpers for little-endian architectures where CPU and on-disk
1950 * structures have the same endianness and we can skip conversions.
1951 */
1952
btrfs_disk_key_to_cpu(struct btrfs_key * cpu_key,const struct btrfs_disk_key * disk_key)1953 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
1954 const struct btrfs_disk_key *disk_key)
1955 {
1956 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
1957 }
1958
btrfs_cpu_key_to_disk(struct btrfs_disk_key * disk_key,const struct btrfs_key * cpu_key)1959 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
1960 const struct btrfs_key *cpu_key)
1961 {
1962 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
1963 }
1964
btrfs_node_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * cpu_key,int nr)1965 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1966 struct btrfs_key *cpu_key, int nr)
1967 {
1968 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1969
1970 btrfs_node_key(eb, disk_key, nr);
1971 }
1972
btrfs_item_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * cpu_key,int nr)1973 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1974 struct btrfs_key *cpu_key, int nr)
1975 {
1976 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1977
1978 btrfs_item_key(eb, disk_key, nr);
1979 }
1980
btrfs_dir_item_key_to_cpu(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_key * cpu_key)1981 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1982 const struct btrfs_dir_item *item,
1983 struct btrfs_key *cpu_key)
1984 {
1985 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1986
1987 btrfs_dir_item_key(eb, item, disk_key);
1988 }
1989
1990 #else
1991
btrfs_disk_key_to_cpu(struct btrfs_key * cpu,const struct btrfs_disk_key * disk)1992 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1993 const struct btrfs_disk_key *disk)
1994 {
1995 cpu->offset = le64_to_cpu(disk->offset);
1996 cpu->type = disk->type;
1997 cpu->objectid = le64_to_cpu(disk->objectid);
1998 }
1999
btrfs_cpu_key_to_disk(struct btrfs_disk_key * disk,const struct btrfs_key * cpu)2000 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2001 const struct btrfs_key *cpu)
2002 {
2003 disk->offset = cpu_to_le64(cpu->offset);
2004 disk->type = cpu->type;
2005 disk->objectid = cpu_to_le64(cpu->objectid);
2006 }
2007
btrfs_node_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * key,int nr)2008 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2009 struct btrfs_key *key, int nr)
2010 {
2011 struct btrfs_disk_key disk_key;
2012 btrfs_node_key(eb, &disk_key, nr);
2013 btrfs_disk_key_to_cpu(key, &disk_key);
2014 }
2015
btrfs_item_key_to_cpu(const struct extent_buffer * eb,struct btrfs_key * key,int nr)2016 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2017 struct btrfs_key *key, int nr)
2018 {
2019 struct btrfs_disk_key disk_key;
2020 btrfs_item_key(eb, &disk_key, nr);
2021 btrfs_disk_key_to_cpu(key, &disk_key);
2022 }
2023
btrfs_dir_item_key_to_cpu(const struct extent_buffer * eb,const struct btrfs_dir_item * item,struct btrfs_key * key)2024 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2025 const struct btrfs_dir_item *item,
2026 struct btrfs_key *key)
2027 {
2028 struct btrfs_disk_key disk_key;
2029 btrfs_dir_item_key(eb, item, &disk_key);
2030 btrfs_disk_key_to_cpu(key, &disk_key);
2031 }
2032
2033 #endif
2034
2035 /* struct btrfs_header */
2036 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2037 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2038 generation, 64);
2039 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2040 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2041 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2042 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2043 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2044 generation, 64);
2045 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2046 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2047 nritems, 32);
2048 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2049
btrfs_header_flag(const struct extent_buffer * eb,u64 flag)2050 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2051 {
2052 return (btrfs_header_flags(eb) & flag) == flag;
2053 }
2054
btrfs_set_header_flag(struct extent_buffer * eb,u64 flag)2055 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2056 {
2057 u64 flags = btrfs_header_flags(eb);
2058 btrfs_set_header_flags(eb, flags | flag);
2059 }
2060
btrfs_clear_header_flag(struct extent_buffer * eb,u64 flag)2061 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2062 {
2063 u64 flags = btrfs_header_flags(eb);
2064 btrfs_set_header_flags(eb, flags & ~flag);
2065 }
2066
btrfs_header_backref_rev(const struct extent_buffer * eb)2067 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2068 {
2069 u64 flags = btrfs_header_flags(eb);
2070 return flags >> BTRFS_BACKREF_REV_SHIFT;
2071 }
2072
btrfs_set_header_backref_rev(struct extent_buffer * eb,int rev)2073 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2074 int rev)
2075 {
2076 u64 flags = btrfs_header_flags(eb);
2077 flags &= ~BTRFS_BACKREF_REV_MASK;
2078 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2079 btrfs_set_header_flags(eb, flags);
2080 }
2081
btrfs_is_leaf(const struct extent_buffer * eb)2082 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2083 {
2084 return btrfs_header_level(eb) == 0;
2085 }
2086
2087 /* struct btrfs_root_item */
2088 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2089 generation, 64);
2090 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2091 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2092 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2093
2094 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2095 generation, 64);
2096 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2097 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2098 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2099 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2100 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2101 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2102 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2103 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2104 last_snapshot, 64);
2105 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2106 generation_v2, 64);
2107 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2108 ctransid, 64);
2109 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2110 otransid, 64);
2111 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2112 stransid, 64);
2113 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2114 rtransid, 64);
2115
btrfs_root_readonly(const struct btrfs_root * root)2116 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2117 {
2118 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2119 }
2120
btrfs_root_dead(const struct btrfs_root * root)2121 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2122 {
2123 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2124 }
2125
2126 /* struct btrfs_root_backup */
2127 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2128 tree_root, 64);
2129 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2130 tree_root_gen, 64);
2131 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2132 tree_root_level, 8);
2133
2134 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2135 chunk_root, 64);
2136 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2137 chunk_root_gen, 64);
2138 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2139 chunk_root_level, 8);
2140
2141 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2142 extent_root, 64);
2143 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2144 extent_root_gen, 64);
2145 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2146 extent_root_level, 8);
2147
2148 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2149 fs_root, 64);
2150 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2151 fs_root_gen, 64);
2152 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2153 fs_root_level, 8);
2154
2155 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2156 dev_root, 64);
2157 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2158 dev_root_gen, 64);
2159 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2160 dev_root_level, 8);
2161
2162 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2163 csum_root, 64);
2164 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2165 csum_root_gen, 64);
2166 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2167 csum_root_level, 8);
2168 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2169 total_bytes, 64);
2170 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2171 bytes_used, 64);
2172 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2173 num_devices, 64);
2174
2175 /* struct btrfs_balance_item */
2176 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2177
btrfs_balance_data(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)2178 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2179 const struct btrfs_balance_item *bi,
2180 struct btrfs_disk_balance_args *ba)
2181 {
2182 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2183 }
2184
btrfs_set_balance_data(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)2185 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2186 struct btrfs_balance_item *bi,
2187 const struct btrfs_disk_balance_args *ba)
2188 {
2189 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2190 }
2191
btrfs_balance_meta(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)2192 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2193 const struct btrfs_balance_item *bi,
2194 struct btrfs_disk_balance_args *ba)
2195 {
2196 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2197 }
2198
btrfs_set_balance_meta(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)2199 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2200 struct btrfs_balance_item *bi,
2201 const struct btrfs_disk_balance_args *ba)
2202 {
2203 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2204 }
2205
btrfs_balance_sys(const struct extent_buffer * eb,const struct btrfs_balance_item * bi,struct btrfs_disk_balance_args * ba)2206 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2207 const struct btrfs_balance_item *bi,
2208 struct btrfs_disk_balance_args *ba)
2209 {
2210 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2211 }
2212
btrfs_set_balance_sys(struct extent_buffer * eb,struct btrfs_balance_item * bi,const struct btrfs_disk_balance_args * ba)2213 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2214 struct btrfs_balance_item *bi,
2215 const struct btrfs_disk_balance_args *ba)
2216 {
2217 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2218 }
2219
2220 static inline void
btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args * cpu,const struct btrfs_disk_balance_args * disk)2221 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2222 const struct btrfs_disk_balance_args *disk)
2223 {
2224 memset(cpu, 0, sizeof(*cpu));
2225
2226 cpu->profiles = le64_to_cpu(disk->profiles);
2227 cpu->usage = le64_to_cpu(disk->usage);
2228 cpu->devid = le64_to_cpu(disk->devid);
2229 cpu->pstart = le64_to_cpu(disk->pstart);
2230 cpu->pend = le64_to_cpu(disk->pend);
2231 cpu->vstart = le64_to_cpu(disk->vstart);
2232 cpu->vend = le64_to_cpu(disk->vend);
2233 cpu->target = le64_to_cpu(disk->target);
2234 cpu->flags = le64_to_cpu(disk->flags);
2235 cpu->limit = le64_to_cpu(disk->limit);
2236 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2237 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2238 }
2239
2240 static inline void
btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args * disk,const struct btrfs_balance_args * cpu)2241 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2242 const struct btrfs_balance_args *cpu)
2243 {
2244 memset(disk, 0, sizeof(*disk));
2245
2246 disk->profiles = cpu_to_le64(cpu->profiles);
2247 disk->usage = cpu_to_le64(cpu->usage);
2248 disk->devid = cpu_to_le64(cpu->devid);
2249 disk->pstart = cpu_to_le64(cpu->pstart);
2250 disk->pend = cpu_to_le64(cpu->pend);
2251 disk->vstart = cpu_to_le64(cpu->vstart);
2252 disk->vend = cpu_to_le64(cpu->vend);
2253 disk->target = cpu_to_le64(cpu->target);
2254 disk->flags = cpu_to_le64(cpu->flags);
2255 disk->limit = cpu_to_le64(cpu->limit);
2256 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2257 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2258 }
2259
2260 /* struct btrfs_super_block */
2261 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2262 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2263 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2264 generation, 64);
2265 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2266 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2267 struct btrfs_super_block, sys_chunk_array_size, 32);
2268 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2269 struct btrfs_super_block, chunk_root_generation, 64);
2270 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2271 root_level, 8);
2272 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2273 chunk_root, 64);
2274 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2275 chunk_root_level, 8);
2276 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2277 log_root, 64);
2278 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2279 log_root_transid, 64);
2280 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2281 log_root_level, 8);
2282 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2283 total_bytes, 64);
2284 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2285 bytes_used, 64);
2286 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2287 sectorsize, 32);
2288 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2289 nodesize, 32);
2290 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2291 stripesize, 32);
2292 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2293 root_dir_objectid, 64);
2294 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2295 num_devices, 64);
2296 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2297 compat_flags, 64);
2298 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2299 compat_ro_flags, 64);
2300 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2301 incompat_flags, 64);
2302 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2303 csum_type, 16);
2304 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2305 cache_generation, 64);
2306 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2307 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2308 uuid_tree_generation, 64);
2309
2310 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2311 const char *btrfs_super_csum_name(u16 csum_type);
2312 const char *btrfs_super_csum_driver(u16 csum_type);
2313 size_t __attribute_const__ btrfs_get_num_csums(void);
2314
2315
2316 /*
2317 * The leaf data grows from end-to-front in the node.
2318 * this returns the address of the start of the last item,
2319 * which is the stop of the leaf data stack
2320 */
leaf_data_end(const struct extent_buffer * leaf)2321 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2322 {
2323 u32 nr = btrfs_header_nritems(leaf);
2324
2325 if (nr == 0)
2326 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2327 return btrfs_item_offset_nr(leaf, nr - 1);
2328 }
2329
2330 /* struct btrfs_file_extent_item */
2331 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2332 type, 8);
2333 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2334 struct btrfs_file_extent_item, disk_bytenr, 64);
2335 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2336 struct btrfs_file_extent_item, offset, 64);
2337 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2338 struct btrfs_file_extent_item, generation, 64);
2339 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2340 struct btrfs_file_extent_item, num_bytes, 64);
2341 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2342 struct btrfs_file_extent_item, ram_bytes, 64);
2343 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2344 struct btrfs_file_extent_item, disk_num_bytes, 64);
2345 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2346 struct btrfs_file_extent_item, compression, 8);
2347
2348 static inline unsigned long
btrfs_file_extent_inline_start(const struct btrfs_file_extent_item * e)2349 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2350 {
2351 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2352 }
2353
btrfs_file_extent_calc_inline_size(u32 datasize)2354 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2355 {
2356 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2357 }
2358
2359 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2360 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2361 disk_bytenr, 64);
2362 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2363 generation, 64);
2364 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2365 disk_num_bytes, 64);
2366 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2367 offset, 64);
2368 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2369 num_bytes, 64);
2370 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2371 ram_bytes, 64);
2372 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2373 compression, 8);
2374 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2375 encryption, 8);
2376 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2377 other_encoding, 16);
2378
2379 /*
2380 * this returns the number of bytes used by the item on disk, minus the
2381 * size of any extent headers. If a file is compressed on disk, this is
2382 * the compressed size
2383 */
btrfs_file_extent_inline_item_len(const struct extent_buffer * eb,struct btrfs_item * e)2384 static inline u32 btrfs_file_extent_inline_item_len(
2385 const struct extent_buffer *eb,
2386 struct btrfs_item *e)
2387 {
2388 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2389 }
2390
2391 /* btrfs_qgroup_status_item */
2392 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2393 generation, 64);
2394 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2395 version, 64);
2396 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2397 flags, 64);
2398 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2399 rescan, 64);
2400
2401 /* btrfs_qgroup_info_item */
2402 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2403 generation, 64);
2404 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2405 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2406 rfer_cmpr, 64);
2407 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2408 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2409 excl_cmpr, 64);
2410
2411 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2412 struct btrfs_qgroup_info_item, generation, 64);
2413 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2414 rfer, 64);
2415 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2416 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2417 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2418 excl, 64);
2419 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2420 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2421
2422 /* btrfs_qgroup_limit_item */
2423 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2424 flags, 64);
2425 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2426 max_rfer, 64);
2427 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2428 max_excl, 64);
2429 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2430 rsv_rfer, 64);
2431 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2432 rsv_excl, 64);
2433
2434 /* btrfs_dev_replace_item */
2435 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2436 struct btrfs_dev_replace_item, src_devid, 64);
2437 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2438 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2439 64);
2440 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2441 replace_state, 64);
2442 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2443 time_started, 64);
2444 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2445 time_stopped, 64);
2446 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2447 num_write_errors, 64);
2448 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2449 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2450 64);
2451 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2452 cursor_left, 64);
2453 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2454 cursor_right, 64);
2455
2456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2457 struct btrfs_dev_replace_item, src_devid, 64);
2458 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2459 struct btrfs_dev_replace_item,
2460 cont_reading_from_srcdev_mode, 64);
2461 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2462 struct btrfs_dev_replace_item, replace_state, 64);
2463 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2464 struct btrfs_dev_replace_item, time_started, 64);
2465 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2466 struct btrfs_dev_replace_item, time_stopped, 64);
2467 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2468 struct btrfs_dev_replace_item, num_write_errors, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2470 struct btrfs_dev_replace_item,
2471 num_uncorrectable_read_errors, 64);
2472 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2473 struct btrfs_dev_replace_item, cursor_left, 64);
2474 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2475 struct btrfs_dev_replace_item, cursor_right, 64);
2476
2477 /* helper function to cast into the data area of the leaf. */
2478 #define btrfs_item_ptr(leaf, slot, type) \
2479 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2480 btrfs_item_offset_nr(leaf, slot)))
2481
2482 #define btrfs_item_ptr_offset(leaf, slot) \
2483 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2484 btrfs_item_offset_nr(leaf, slot)))
2485
btrfs_crc32c(u32 crc,const void * address,unsigned length)2486 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2487 {
2488 return crc32c(crc, address, length);
2489 }
2490
btrfs_crc32c_final(u32 crc,u8 * result)2491 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2492 {
2493 put_unaligned_le32(~crc, result);
2494 }
2495
btrfs_name_hash(const char * name,int len)2496 static inline u64 btrfs_name_hash(const char *name, int len)
2497 {
2498 return crc32c((u32)~1, name, len);
2499 }
2500
2501 /*
2502 * Figure the key offset of an extended inode ref
2503 */
btrfs_extref_hash(u64 parent_objectid,const char * name,int len)2504 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2505 int len)
2506 {
2507 return (u64) crc32c(parent_objectid, name, len);
2508 }
2509
btrfs_alloc_write_mask(struct address_space * mapping)2510 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2511 {
2512 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2513 }
2514
2515 /* extent-tree.c */
2516
2517 enum btrfs_inline_ref_type {
2518 BTRFS_REF_TYPE_INVALID,
2519 BTRFS_REF_TYPE_BLOCK,
2520 BTRFS_REF_TYPE_DATA,
2521 BTRFS_REF_TYPE_ANY,
2522 };
2523
2524 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2525 struct btrfs_extent_inline_ref *iref,
2526 enum btrfs_inline_ref_type is_data);
2527 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2528
2529 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2530
2531 /*
2532 * Use this if we would be adding new items, as we could split nodes as we cow
2533 * down the tree.
2534 */
btrfs_calc_insert_metadata_size(struct btrfs_fs_info * fs_info,unsigned num_items)2535 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2536 unsigned num_items)
2537 {
2538 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2539 }
2540
2541 /*
2542 * Doing a truncate or a modification won't result in new nodes or leaves, just
2543 * what we need for COW.
2544 */
btrfs_calc_metadata_size(struct btrfs_fs_info * fs_info,unsigned num_items)2545 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2546 unsigned num_items)
2547 {
2548 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2549 }
2550
2551 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2552 u64 start, u64 num_bytes);
2553 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2554 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2555 unsigned long count);
2556 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2557 struct btrfs_delayed_ref_root *delayed_refs,
2558 struct btrfs_delayed_ref_head *head);
2559 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2560 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2561 struct btrfs_fs_info *fs_info, u64 bytenr,
2562 u64 offset, int metadata, u64 *refs, u64 *flags);
2563 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2564 int reserved);
2565 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2566 u64 bytenr, u64 num_bytes);
2567 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2568 int btrfs_cross_ref_exist(struct btrfs_root *root,
2569 u64 objectid, u64 offset, u64 bytenr, bool strict);
2570 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2571 struct btrfs_root *root,
2572 u64 parent, u64 root_objectid,
2573 const struct btrfs_disk_key *key,
2574 int level, u64 hint,
2575 u64 empty_size,
2576 enum btrfs_lock_nesting nest);
2577 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2578 struct btrfs_root *root,
2579 struct extent_buffer *buf,
2580 u64 parent, int last_ref);
2581 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2582 struct btrfs_root *root, u64 owner,
2583 u64 offset, u64 ram_bytes,
2584 struct btrfs_key *ins);
2585 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2586 u64 root_objectid, u64 owner, u64 offset,
2587 struct btrfs_key *ins);
2588 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2589 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2590 struct btrfs_key *ins, int is_data, int delalloc);
2591 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2592 struct extent_buffer *buf, int full_backref);
2593 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2594 struct extent_buffer *buf, int full_backref);
2595 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2596 struct extent_buffer *eb, u64 flags,
2597 int level, int is_data);
2598 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2599
2600 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2601 u64 start, u64 len, int delalloc);
2602 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2603 u64 len);
2604 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2605 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2606 struct btrfs_ref *generic_ref);
2607
2608 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2609 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2610
2611 /*
2612 * Different levels for to flush space when doing space reservations.
2613 *
2614 * The higher the level, the more methods we try to reclaim space.
2615 */
2616 enum btrfs_reserve_flush_enum {
2617 /* If we are in the transaction, we can't flush anything.*/
2618 BTRFS_RESERVE_NO_FLUSH,
2619
2620 /*
2621 * Flush space by:
2622 * - Running delayed inode items
2623 * - Allocating a new chunk
2624 */
2625 BTRFS_RESERVE_FLUSH_LIMIT,
2626
2627 /*
2628 * Flush space by:
2629 * - Running delayed inode items
2630 * - Running delayed refs
2631 * - Running delalloc and waiting for ordered extents
2632 * - Allocating a new chunk
2633 */
2634 BTRFS_RESERVE_FLUSH_EVICT,
2635
2636 /*
2637 * Flush space by above mentioned methods and by:
2638 * - Running delayed iputs
2639 * - Commiting transaction
2640 *
2641 * Can be interruped by fatal signal.
2642 */
2643 BTRFS_RESERVE_FLUSH_DATA,
2644 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2645 BTRFS_RESERVE_FLUSH_ALL,
2646
2647 /*
2648 * Pretty much the same as FLUSH_ALL, but can also steal space from
2649 * global rsv.
2650 *
2651 * Can be interruped by fatal signal.
2652 */
2653 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2654 };
2655
2656 enum btrfs_flush_state {
2657 FLUSH_DELAYED_ITEMS_NR = 1,
2658 FLUSH_DELAYED_ITEMS = 2,
2659 FLUSH_DELAYED_REFS_NR = 3,
2660 FLUSH_DELAYED_REFS = 4,
2661 FLUSH_DELALLOC = 5,
2662 FLUSH_DELALLOC_WAIT = 6,
2663 ALLOC_CHUNK = 7,
2664 ALLOC_CHUNK_FORCE = 8,
2665 RUN_DELAYED_IPUTS = 9,
2666 COMMIT_TRANS = 10,
2667 };
2668
2669 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2670 struct btrfs_block_rsv *rsv,
2671 int nitems, bool use_global_rsv);
2672 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2673 struct btrfs_block_rsv *rsv);
2674 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2675
2676 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2677 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2678 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2679 u64 start, u64 end);
2680 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2681 u64 num_bytes, u64 *actual_bytes);
2682 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2683
2684 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2685 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2686 struct btrfs_fs_info *fs_info);
2687 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2688 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2689 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2690
2691 /* ctree.c */
2692 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2693 int *slot);
2694 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2695 int btrfs_previous_item(struct btrfs_root *root,
2696 struct btrfs_path *path, u64 min_objectid,
2697 int type);
2698 int btrfs_previous_extent_item(struct btrfs_root *root,
2699 struct btrfs_path *path, u64 min_objectid);
2700 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2701 struct btrfs_path *path,
2702 const struct btrfs_key *new_key);
2703 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2704 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2705 struct btrfs_key *key, int lowest_level,
2706 u64 min_trans);
2707 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2708 struct btrfs_path *path,
2709 u64 min_trans);
2710 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2711 int slot);
2712
2713 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2714 struct btrfs_root *root, struct extent_buffer *buf,
2715 struct extent_buffer *parent, int parent_slot,
2716 struct extent_buffer **cow_ret,
2717 enum btrfs_lock_nesting nest);
2718 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2719 struct btrfs_root *root,
2720 struct extent_buffer *buf,
2721 struct extent_buffer **cow_ret, u64 new_root_objectid);
2722 int btrfs_block_can_be_shared(struct btrfs_root *root,
2723 struct extent_buffer *buf);
2724 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2725 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2726 int btrfs_split_item(struct btrfs_trans_handle *trans,
2727 struct btrfs_root *root,
2728 struct btrfs_path *path,
2729 const struct btrfs_key *new_key,
2730 unsigned long split_offset);
2731 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2732 struct btrfs_root *root,
2733 struct btrfs_path *path,
2734 const struct btrfs_key *new_key);
2735 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2736 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2737 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2738 const struct btrfs_key *key, struct btrfs_path *p,
2739 int ins_len, int cow);
2740 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2741 struct btrfs_path *p, u64 time_seq);
2742 int btrfs_search_slot_for_read(struct btrfs_root *root,
2743 const struct btrfs_key *key,
2744 struct btrfs_path *p, int find_higher,
2745 int return_any);
2746 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2747 struct btrfs_root *root, struct extent_buffer *parent,
2748 int start_slot, u64 *last_ret,
2749 struct btrfs_key *progress);
2750 void btrfs_release_path(struct btrfs_path *p);
2751 struct btrfs_path *btrfs_alloc_path(void);
2752 void btrfs_free_path(struct btrfs_path *p);
2753
2754 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2755 struct btrfs_path *path, int slot, int nr);
btrfs_del_item(struct btrfs_trans_handle * trans,struct btrfs_root * root,struct btrfs_path * path)2756 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root,
2758 struct btrfs_path *path)
2759 {
2760 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2761 }
2762
2763 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2764 const struct btrfs_key *cpu_key, u32 *data_size,
2765 int nr);
2766 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2767 const struct btrfs_key *key, void *data, u32 data_size);
2768 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2769 struct btrfs_root *root,
2770 struct btrfs_path *path,
2771 const struct btrfs_key *cpu_key, u32 *data_size,
2772 int nr);
2773
btrfs_insert_empty_item(struct btrfs_trans_handle * trans,struct btrfs_root * root,struct btrfs_path * path,const struct btrfs_key * key,u32 data_size)2774 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2775 struct btrfs_root *root,
2776 struct btrfs_path *path,
2777 const struct btrfs_key *key,
2778 u32 data_size)
2779 {
2780 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2781 }
2782
2783 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2784 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2785 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2786 u64 time_seq);
btrfs_next_old_item(struct btrfs_root * root,struct btrfs_path * p,u64 time_seq)2787 static inline int btrfs_next_old_item(struct btrfs_root *root,
2788 struct btrfs_path *p, u64 time_seq)
2789 {
2790 ++p->slots[0];
2791 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2792 return btrfs_next_old_leaf(root, p, time_seq);
2793 return 0;
2794 }
btrfs_next_item(struct btrfs_root * root,struct btrfs_path * p)2795 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2796 {
2797 return btrfs_next_old_item(root, p, 0);
2798 }
2799 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2800 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2801 int for_reloc);
2802 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2803 struct btrfs_root *root,
2804 struct extent_buffer *node,
2805 struct extent_buffer *parent);
btrfs_fs_closing(struct btrfs_fs_info * fs_info)2806 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2807 {
2808 /*
2809 * Do it this way so we only ever do one test_bit in the normal case.
2810 */
2811 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2812 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2813 return 2;
2814 return 1;
2815 }
2816 return 0;
2817 }
2818
2819 /*
2820 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2821 * anything except sleeping. This function is used to check the status of
2822 * the fs.
2823 */
btrfs_need_cleaner_sleep(struct btrfs_fs_info * fs_info)2824 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2825 {
2826 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2827 }
2828
2829 /* tree mod log functions from ctree.c */
2830 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2831 struct seq_list *elem);
2832 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2833 struct seq_list *elem);
2834 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2835
2836 /* root-item.c */
2837 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2838 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2839 int name_len);
2840 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2841 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2842 int name_len);
2843 int btrfs_del_root(struct btrfs_trans_handle *trans,
2844 const struct btrfs_key *key);
2845 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2846 const struct btrfs_key *key,
2847 struct btrfs_root_item *item);
2848 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2849 struct btrfs_root *root,
2850 struct btrfs_key *key,
2851 struct btrfs_root_item *item);
2852 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2853 struct btrfs_path *path, struct btrfs_root_item *root_item,
2854 struct btrfs_key *root_key);
2855 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2856 void btrfs_set_root_node(struct btrfs_root_item *item,
2857 struct extent_buffer *node);
2858 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2859 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2860 struct btrfs_root *root);
2861
2862 /* uuid-tree.c */
2863 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2864 u64 subid);
2865 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2866 u64 subid);
2867 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2868
2869 /* dir-item.c */
2870 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2871 const char *name, int name_len);
2872 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2873 int name_len, struct btrfs_inode *dir,
2874 struct btrfs_key *location, u8 type, u64 index);
2875 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2876 struct btrfs_root *root,
2877 struct btrfs_path *path, u64 dir,
2878 const char *name, int name_len,
2879 int mod);
2880 struct btrfs_dir_item *
2881 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2882 struct btrfs_root *root,
2883 struct btrfs_path *path, u64 dir,
2884 u64 objectid, const char *name, int name_len,
2885 int mod);
2886 struct btrfs_dir_item *
2887 btrfs_search_dir_index_item(struct btrfs_root *root,
2888 struct btrfs_path *path, u64 dirid,
2889 const char *name, int name_len);
2890 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2891 struct btrfs_root *root,
2892 struct btrfs_path *path,
2893 struct btrfs_dir_item *di);
2894 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2895 struct btrfs_root *root,
2896 struct btrfs_path *path, u64 objectid,
2897 const char *name, u16 name_len,
2898 const void *data, u16 data_len);
2899 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2900 struct btrfs_root *root,
2901 struct btrfs_path *path, u64 dir,
2902 const char *name, u16 name_len,
2903 int mod);
2904 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2905 struct btrfs_path *path,
2906 const char *name,
2907 int name_len);
2908
2909 /* orphan.c */
2910 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2911 struct btrfs_root *root, u64 offset);
2912 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2913 struct btrfs_root *root, u64 offset);
2914 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2915
2916 /* inode-item.c */
2917 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2918 struct btrfs_root *root,
2919 const char *name, int name_len,
2920 u64 inode_objectid, u64 ref_objectid, u64 index);
2921 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2922 struct btrfs_root *root,
2923 const char *name, int name_len,
2924 u64 inode_objectid, u64 ref_objectid, u64 *index);
2925 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2926 struct btrfs_root *root,
2927 struct btrfs_path *path, u64 objectid);
2928 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2929 *root, struct btrfs_path *path,
2930 struct btrfs_key *location, int mod);
2931
2932 struct btrfs_inode_extref *
2933 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2934 struct btrfs_root *root,
2935 struct btrfs_path *path,
2936 const char *name, int name_len,
2937 u64 inode_objectid, u64 ref_objectid, int ins_len,
2938 int cow);
2939
2940 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2941 int slot, const char *name,
2942 int name_len);
2943 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2944 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2945 const char *name, int name_len);
2946 /* file-item.c */
2947 struct btrfs_dio_private;
2948 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2949 struct btrfs_root *root, u64 bytenr, u64 len);
2950 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2951 u64 offset, u8 *dst);
2952 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2953 struct btrfs_root *root,
2954 u64 objectid, u64 pos,
2955 u64 disk_offset, u64 disk_num_bytes,
2956 u64 num_bytes, u64 offset, u64 ram_bytes,
2957 u8 compression, u8 encryption, u16 other_encoding);
2958 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2959 struct btrfs_root *root,
2960 struct btrfs_path *path, u64 objectid,
2961 u64 bytenr, int mod);
2962 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2963 struct btrfs_root *root,
2964 struct btrfs_ordered_sum *sums);
2965 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
2966 u64 file_start, int contig);
2967 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2968 struct list_head *list, int search_commit);
2969 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2970 const struct btrfs_path *path,
2971 struct btrfs_file_extent_item *fi,
2972 const bool new_inline,
2973 struct extent_map *em);
2974 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
2975 u64 len);
2976 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
2977 u64 len);
2978 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size);
2979 u64 btrfs_file_extent_end(const struct btrfs_path *path);
2980
2981 /* inode.c */
2982 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
2983 int mirror_num, unsigned long bio_flags);
2984 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u64 phy_offset,
2985 struct page *page, u64 start, u64 end, int mirror);
2986 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2987 u64 start, u64 len);
2988 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2989 u64 *orig_start, u64 *orig_block_len,
2990 u64 *ram_bytes, bool strict);
2991
2992 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2993 struct btrfs_inode *inode);
2994 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2995 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2996 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2997 struct btrfs_root *root,
2998 struct btrfs_inode *dir, struct btrfs_inode *inode,
2999 const char *name, int name_len);
3000 int btrfs_add_link(struct btrfs_trans_handle *trans,
3001 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3002 const char *name, int name_len, int add_backref, u64 index);
3003 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3004 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3005 int front);
3006 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3007 struct btrfs_root *root,
3008 struct inode *inode, u64 new_size,
3009 u32 min_type);
3010
3011 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3012 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr,
3013 bool in_reclaim_context);
3014 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
3015 unsigned int extra_bits,
3016 struct extent_state **cached_state);
3017 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3018 struct btrfs_root *new_root,
3019 struct btrfs_root *parent_root,
3020 u64 new_dirid);
3021 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3022 unsigned *bits);
3023 void btrfs_clear_delalloc_extent(struct inode *inode,
3024 struct extent_state *state, unsigned *bits);
3025 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3026 struct extent_state *other);
3027 void btrfs_split_delalloc_extent(struct inode *inode,
3028 struct extent_state *orig, u64 split);
3029 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3030 unsigned long bio_flags);
3031 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3032 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3033 int btrfs_readpage(struct file *file, struct page *page);
3034 void btrfs_evict_inode(struct inode *inode);
3035 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3036 struct inode *btrfs_alloc_inode(struct super_block *sb);
3037 void btrfs_destroy_inode(struct inode *inode);
3038 void btrfs_free_inode(struct inode *inode);
3039 int btrfs_drop_inode(struct inode *inode);
3040 int __init btrfs_init_cachep(void);
3041 void __cold btrfs_destroy_cachep(void);
3042 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3043 struct btrfs_root *root, struct btrfs_path *path);
3044 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3045 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3046 struct page *page, size_t pg_offset,
3047 u64 start, u64 end);
3048 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3049 struct btrfs_root *root,
3050 struct inode *inode);
3051 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3052 struct btrfs_root *root, struct inode *inode);
3053 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3054 struct btrfs_inode *inode);
3055 int btrfs_orphan_cleanup(struct btrfs_root *root);
3056 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3057 void btrfs_add_delayed_iput(struct inode *inode);
3058 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3059 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3060 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3061 u64 start, u64 num_bytes, u64 min_size,
3062 loff_t actual_len, u64 *alloc_hint);
3063 int btrfs_prealloc_file_range_trans(struct inode *inode,
3064 struct btrfs_trans_handle *trans, int mode,
3065 u64 start, u64 num_bytes, u64 min_size,
3066 loff_t actual_len, u64 *alloc_hint);
3067 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3068 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3069 struct writeback_control *wbc);
3070 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3071 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3072 u64 end, int uptodate);
3073 extern const struct dentry_operations btrfs_dentry_operations;
3074 ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter);
3075
3076 /* ioctl.c */
3077 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3078 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3079 int btrfs_ioctl_get_supported_features(void __user *arg);
3080 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3081 int __pure btrfs_is_empty_uuid(u8 *uuid);
3082 int btrfs_defrag_file(struct inode *inode, struct file *file,
3083 struct btrfs_ioctl_defrag_range_args *range,
3084 u64 newer_than, unsigned long max_pages);
3085 void btrfs_get_block_group_info(struct list_head *groups_list,
3086 struct btrfs_ioctl_space_info *space);
3087 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3088 struct btrfs_ioctl_balance_args *bargs);
3089 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3090 enum btrfs_exclusive_operation type);
3091 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3092
3093 /* file.c */
3094 int __init btrfs_auto_defrag_init(void);
3095 void __cold btrfs_auto_defrag_exit(void);
3096 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3097 struct btrfs_inode *inode);
3098 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3099 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3100 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3101 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3102 int skip_pinned);
3103 extern const struct file_operations btrfs_file_operations;
3104 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3105 struct btrfs_root *root, struct btrfs_inode *inode,
3106 struct btrfs_path *path, u64 start, u64 end,
3107 u64 *drop_end, int drop_cache,
3108 int replace_extent,
3109 u32 extent_item_size,
3110 int *key_inserted);
3111 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3112 struct btrfs_root *root, struct inode *inode, u64 start,
3113 u64 end, int drop_cache);
3114 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path,
3115 const u64 start, const u64 end,
3116 struct btrfs_replace_extent_info *extent_info,
3117 struct btrfs_trans_handle **trans_out);
3118 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3119 struct btrfs_inode *inode, u64 start, u64 end);
3120 int btrfs_release_file(struct inode *inode, struct file *file);
3121 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3122 size_t num_pages, loff_t pos, size_t write_bytes,
3123 struct extent_state **cached);
3124 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3125 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3126 size_t *write_bytes);
3127 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3128
3129 /* tree-defrag.c */
3130 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3131 struct btrfs_root *root);
3132
3133 /* super.c */
3134 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3135 unsigned long new_flags);
3136 int btrfs_sync_fs(struct super_block *sb, int wait);
3137 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3138 u64 subvol_objectid);
3139
3140 static inline __printf(2, 3) __cold
btrfs_no_printk(const struct btrfs_fs_info * fs_info,const char * fmt,...)3141 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3142 {
3143 }
3144
3145 #ifdef CONFIG_PRINTK
3146 __printf(2, 3)
3147 __cold
3148 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3149 #else
3150 #define btrfs_printk(fs_info, fmt, args...) \
3151 btrfs_no_printk(fs_info, fmt, ##args)
3152 #endif
3153
3154 #define btrfs_emerg(fs_info, fmt, args...) \
3155 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3156 #define btrfs_alert(fs_info, fmt, args...) \
3157 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3158 #define btrfs_crit(fs_info, fmt, args...) \
3159 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3160 #define btrfs_err(fs_info, fmt, args...) \
3161 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3162 #define btrfs_warn(fs_info, fmt, args...) \
3163 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3164 #define btrfs_notice(fs_info, fmt, args...) \
3165 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3166 #define btrfs_info(fs_info, fmt, args...) \
3167 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3168
3169 /*
3170 * Wrappers that use printk_in_rcu
3171 */
3172 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3173 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3174 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3175 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3176 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3177 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3178 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3179 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3180 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3181 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3182 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3183 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3184 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3185 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3186
3187 /*
3188 * Wrappers that use a ratelimited printk_in_rcu
3189 */
3190 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3191 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3192 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3193 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3194 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3195 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3196 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3197 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3198 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3199 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3200 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3201 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3202 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3203 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3204
3205 /*
3206 * Wrappers that use a ratelimited printk
3207 */
3208 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3209 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3210 #define btrfs_alert_rl(fs_info, fmt, args...) \
3211 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3212 #define btrfs_crit_rl(fs_info, fmt, args...) \
3213 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3214 #define btrfs_err_rl(fs_info, fmt, args...) \
3215 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3216 #define btrfs_warn_rl(fs_info, fmt, args...) \
3217 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3218 #define btrfs_notice_rl(fs_info, fmt, args...) \
3219 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3220 #define btrfs_info_rl(fs_info, fmt, args...) \
3221 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3222
3223 #if defined(CONFIG_DYNAMIC_DEBUG)
3224 #define btrfs_debug(fs_info, fmt, args...) \
3225 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3226 fs_info, KERN_DEBUG fmt, ##args)
3227 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3228 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3229 fs_info, KERN_DEBUG fmt, ##args)
3230 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3231 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3232 fs_info, KERN_DEBUG fmt, ##args)
3233 #define btrfs_debug_rl(fs_info, fmt, args...) \
3234 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3235 fs_info, KERN_DEBUG fmt, ##args)
3236 #elif defined(DEBUG)
3237 #define btrfs_debug(fs_info, fmt, args...) \
3238 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3239 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3240 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3241 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3242 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3243 #define btrfs_debug_rl(fs_info, fmt, args...) \
3244 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3245 #else
3246 #define btrfs_debug(fs_info, fmt, args...) \
3247 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3248 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3249 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3250 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3251 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3252 #define btrfs_debug_rl(fs_info, fmt, args...) \
3253 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3254 #endif
3255
3256 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3257 do { \
3258 rcu_read_lock(); \
3259 btrfs_printk(fs_info, fmt, ##args); \
3260 rcu_read_unlock(); \
3261 } while (0)
3262
3263 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3264 do { \
3265 rcu_read_lock(); \
3266 btrfs_no_printk(fs_info, fmt, ##args); \
3267 rcu_read_unlock(); \
3268 } while (0)
3269
3270 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3271 do { \
3272 static DEFINE_RATELIMIT_STATE(_rs, \
3273 DEFAULT_RATELIMIT_INTERVAL, \
3274 DEFAULT_RATELIMIT_BURST); \
3275 if (__ratelimit(&_rs)) \
3276 btrfs_printk(fs_info, fmt, ##args); \
3277 } while (0)
3278
3279 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3280 do { \
3281 rcu_read_lock(); \
3282 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3283 rcu_read_unlock(); \
3284 } while (0)
3285
3286 #ifdef CONFIG_BTRFS_ASSERT
3287 __cold __noreturn
assertfail(const char * expr,const char * file,int line)3288 static inline void assertfail(const char *expr, const char *file, int line)
3289 {
3290 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3291 BUG();
3292 }
3293
3294 #define ASSERT(expr) \
3295 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3296
3297 #else
assertfail(const char * expr,const char * file,int line)3298 static inline void assertfail(const char *expr, const char* file, int line) { }
3299 #define ASSERT(expr) (void)(expr)
3300 #endif
3301
3302 /*
3303 * Use that for functions that are conditionally exported for sanity tests but
3304 * otherwise static
3305 */
3306 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3307 #define EXPORT_FOR_TESTS static
3308 #else
3309 #define EXPORT_FOR_TESTS
3310 #endif
3311
3312 __cold
btrfs_print_v0_err(struct btrfs_fs_info * fs_info)3313 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3314 {
3315 btrfs_err(fs_info,
3316 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3317 }
3318
3319 __printf(5, 6)
3320 __cold
3321 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3322 unsigned int line, int errno, const char *fmt, ...);
3323
3324 const char * __attribute_const__ btrfs_decode_error(int errno);
3325
3326 __cold
3327 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3328 const char *function,
3329 unsigned int line, int errno);
3330
3331 /*
3332 * Call btrfs_abort_transaction as early as possible when an error condition is
3333 * detected, that way the exact line number is reported.
3334 */
3335 #define btrfs_abort_transaction(trans, errno) \
3336 do { \
3337 /* Report first abort since mount */ \
3338 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3339 &((trans)->fs_info->fs_state))) { \
3340 if ((errno) != -EIO && (errno) != -EROFS) { \
3341 WARN(1, KERN_DEBUG \
3342 "BTRFS: Transaction aborted (error %d)\n", \
3343 (errno)); \
3344 } else { \
3345 btrfs_debug((trans)->fs_info, \
3346 "Transaction aborted (error %d)", \
3347 (errno)); \
3348 } \
3349 } \
3350 __btrfs_abort_transaction((trans), __func__, \
3351 __LINE__, (errno)); \
3352 } while (0)
3353
3354 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3355 do { \
3356 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3357 (errno), fmt, ##args); \
3358 } while (0)
3359
3360 __printf(5, 6)
3361 __cold
3362 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3363 unsigned int line, int errno, const char *fmt, ...);
3364 /*
3365 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3366 * will panic(). Otherwise we BUG() here.
3367 */
3368 #define btrfs_panic(fs_info, errno, fmt, args...) \
3369 do { \
3370 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3371 BUG(); \
3372 } while (0)
3373
3374
3375 /* compatibility and incompatibility defines */
3376
3377 #define btrfs_set_fs_incompat(__fs_info, opt) \
3378 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3379 #opt)
3380
__btrfs_set_fs_incompat(struct btrfs_fs_info * fs_info,u64 flag,const char * name)3381 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3382 u64 flag, const char* name)
3383 {
3384 struct btrfs_super_block *disk_super;
3385 u64 features;
3386
3387 disk_super = fs_info->super_copy;
3388 features = btrfs_super_incompat_flags(disk_super);
3389 if (!(features & flag)) {
3390 spin_lock(&fs_info->super_lock);
3391 features = btrfs_super_incompat_flags(disk_super);
3392 if (!(features & flag)) {
3393 features |= flag;
3394 btrfs_set_super_incompat_flags(disk_super, features);
3395 btrfs_info(fs_info,
3396 "setting incompat feature flag for %s (0x%llx)",
3397 name, flag);
3398 }
3399 spin_unlock(&fs_info->super_lock);
3400 }
3401 }
3402
3403 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3404 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3405 #opt)
3406
__btrfs_clear_fs_incompat(struct btrfs_fs_info * fs_info,u64 flag,const char * name)3407 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3408 u64 flag, const char* name)
3409 {
3410 struct btrfs_super_block *disk_super;
3411 u64 features;
3412
3413 disk_super = fs_info->super_copy;
3414 features = btrfs_super_incompat_flags(disk_super);
3415 if (features & flag) {
3416 spin_lock(&fs_info->super_lock);
3417 features = btrfs_super_incompat_flags(disk_super);
3418 if (features & flag) {
3419 features &= ~flag;
3420 btrfs_set_super_incompat_flags(disk_super, features);
3421 btrfs_info(fs_info,
3422 "clearing incompat feature flag for %s (0x%llx)",
3423 name, flag);
3424 }
3425 spin_unlock(&fs_info->super_lock);
3426 }
3427 }
3428
3429 #define btrfs_fs_incompat(fs_info, opt) \
3430 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3431
__btrfs_fs_incompat(struct btrfs_fs_info * fs_info,u64 flag)3432 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3433 {
3434 struct btrfs_super_block *disk_super;
3435 disk_super = fs_info->super_copy;
3436 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3437 }
3438
3439 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3440 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3441 #opt)
3442
__btrfs_set_fs_compat_ro(struct btrfs_fs_info * fs_info,u64 flag,const char * name)3443 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3444 u64 flag, const char *name)
3445 {
3446 struct btrfs_super_block *disk_super;
3447 u64 features;
3448
3449 disk_super = fs_info->super_copy;
3450 features = btrfs_super_compat_ro_flags(disk_super);
3451 if (!(features & flag)) {
3452 spin_lock(&fs_info->super_lock);
3453 features = btrfs_super_compat_ro_flags(disk_super);
3454 if (!(features & flag)) {
3455 features |= flag;
3456 btrfs_set_super_compat_ro_flags(disk_super, features);
3457 btrfs_info(fs_info,
3458 "setting compat-ro feature flag for %s (0x%llx)",
3459 name, flag);
3460 }
3461 spin_unlock(&fs_info->super_lock);
3462 }
3463 }
3464
3465 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3466 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3467 #opt)
3468
__btrfs_clear_fs_compat_ro(struct btrfs_fs_info * fs_info,u64 flag,const char * name)3469 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3470 u64 flag, const char *name)
3471 {
3472 struct btrfs_super_block *disk_super;
3473 u64 features;
3474
3475 disk_super = fs_info->super_copy;
3476 features = btrfs_super_compat_ro_flags(disk_super);
3477 if (features & flag) {
3478 spin_lock(&fs_info->super_lock);
3479 features = btrfs_super_compat_ro_flags(disk_super);
3480 if (features & flag) {
3481 features &= ~flag;
3482 btrfs_set_super_compat_ro_flags(disk_super, features);
3483 btrfs_info(fs_info,
3484 "clearing compat-ro feature flag for %s (0x%llx)",
3485 name, flag);
3486 }
3487 spin_unlock(&fs_info->super_lock);
3488 }
3489 }
3490
3491 #define btrfs_fs_compat_ro(fs_info, opt) \
3492 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3493
__btrfs_fs_compat_ro(struct btrfs_fs_info * fs_info,u64 flag)3494 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3495 {
3496 struct btrfs_super_block *disk_super;
3497 disk_super = fs_info->super_copy;
3498 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3499 }
3500
3501 /* acl.c */
3502 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3503 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3504 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3505 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3506 struct inode *inode, struct inode *dir);
3507 #else
3508 #define btrfs_get_acl NULL
3509 #define btrfs_set_acl NULL
btrfs_init_acl(struct btrfs_trans_handle * trans,struct inode * inode,struct inode * dir)3510 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3511 struct inode *inode, struct inode *dir)
3512 {
3513 return 0;
3514 }
3515 #endif
3516
3517 /* relocation.c */
3518 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3519 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3520 struct btrfs_root *root);
3521 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3522 struct btrfs_root *root);
3523 int btrfs_recover_relocation(struct btrfs_root *root);
3524 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3525 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3526 struct btrfs_root *root, struct extent_buffer *buf,
3527 struct extent_buffer *cow);
3528 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3529 u64 *bytes_to_reserve);
3530 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3531 struct btrfs_pending_snapshot *pending);
3532 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3533 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3534 u64 bytenr);
3535 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3536
3537 /* scrub.c */
3538 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3539 u64 end, struct btrfs_scrub_progress *progress,
3540 int readonly, int is_dev_replace);
3541 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3542 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3543 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3544 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3545 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3546 struct btrfs_scrub_progress *progress);
btrfs_init_full_stripe_locks_tree(struct btrfs_full_stripe_locks_tree * locks_root)3547 static inline void btrfs_init_full_stripe_locks_tree(
3548 struct btrfs_full_stripe_locks_tree *locks_root)
3549 {
3550 locks_root->root = RB_ROOT;
3551 mutex_init(&locks_root->lock);
3552 }
3553
3554 /* dev-replace.c */
3555 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3556 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3557 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3558
btrfs_bio_counter_dec(struct btrfs_fs_info * fs_info)3559 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3560 {
3561 btrfs_bio_counter_sub(fs_info, 1);
3562 }
3563
3564 /* reada.c */
3565 struct reada_control {
3566 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3567 struct btrfs_key key_start;
3568 struct btrfs_key key_end; /* exclusive */
3569 atomic_t elems;
3570 struct kref refcnt;
3571 wait_queue_head_t wait;
3572 };
3573 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3574 struct btrfs_key *start, struct btrfs_key *end);
3575 int btrfs_reada_wait(void *handle);
3576 void btrfs_reada_detach(void *handle);
3577 int btree_readahead_hook(struct extent_buffer *eb, int err);
3578 void btrfs_reada_remove_dev(struct btrfs_device *dev);
3579 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev);
3580
is_fstree(u64 rootid)3581 static inline int is_fstree(u64 rootid)
3582 {
3583 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3584 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3585 !btrfs_qgroup_level(rootid)))
3586 return 1;
3587 return 0;
3588 }
3589
btrfs_defrag_cancelled(struct btrfs_fs_info * fs_info)3590 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3591 {
3592 return signal_pending(current);
3593 }
3594
3595 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3596
3597 /* Sanity test specific functions */
3598 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3599 void btrfs_test_destroy_inode(struct inode *inode);
btrfs_is_testing(struct btrfs_fs_info * fs_info)3600 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3601 {
3602 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3603 }
3604 #else
btrfs_is_testing(struct btrfs_fs_info * fs_info)3605 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3606 {
3607 return 0;
3608 }
3609 #endif
3610
3611 #endif
3612