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