1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.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"
37 struct btrfs_trans_handle;
38 struct btrfs_transaction;
39 struct btrfs_pending_snapshot;
40 struct btrfs_delayed_ref_root;
41 struct btrfs_space_info;
42 struct btrfs_block_group;
43 extern struct kmem_cache *btrfs_trans_handle_cachep;
44 extern struct kmem_cache *btrfs_bit_radix_cachep;
45 extern struct kmem_cache *btrfs_path_cachep;
46 extern struct kmem_cache *btrfs_free_space_cachep;
47 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
48 struct btrfs_ordered_sum;
51 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
54 * Maximum number of mirrors that can be available for all profiles counting
55 * the target device of dev-replace as one. During an active device replace
56 * procedure, the target device of the copy operation is a mirror for the
57 * filesystem data as well that can be used to read data in order to repair
58 * read errors on other disks.
60 * Current value is derived from RAID1C4 with 4 copies.
62 #define BTRFS_MAX_MIRRORS (4 + 1)
64 #define BTRFS_MAX_LEVEL 8
66 #define BTRFS_OLDEST_GENERATION 0ULL
69 * the max metadata block size. This limit is somewhat artificial,
70 * but the memmove costs go through the roof for larger blocks.
72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
75 * we can actually store much bigger names, but lets not confuse the rest
78 #define BTRFS_NAME_LEN 255
81 * Theoretical limit is larger, but we keep this down to a sane
82 * value. That should limit greatly the possibility of collisions on
85 #define BTRFS_LINK_MAX 65535U
87 #define BTRFS_EMPTY_DIR_SIZE 0
89 /* ioprio of readahead is set to idle */
90 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
92 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
95 * Use large batch size to reduce overhead of metadata updates. On the reader
96 * side, we only read it when we are close to ENOSPC and the read overhead is
97 * mostly related to the number of CPUs, so it is OK to use arbitrary large
100 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
106 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
108 static inline u32 count_max_extents(u64 size)
110 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
113 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
115 BUG_ON(num_stripes == 0);
116 return sizeof(struct btrfs_chunk) +
117 sizeof(struct btrfs_stripe) * (num_stripes - 1);
121 * Runtime (in-memory) states of filesystem
124 /* Global indicator of serious filesystem errors */
125 BTRFS_FS_STATE_ERROR,
127 * Filesystem is being remounted, allow to skip some operations, like
130 BTRFS_FS_STATE_REMOUNTING,
131 /* Track if a transaction abort has been reported on this filesystem */
132 BTRFS_FS_STATE_TRANS_ABORTED,
134 * Bio operations should be blocked on this filesystem because a source
135 * or target device is being destroyed as part of a device replace
137 BTRFS_FS_STATE_DEV_REPLACING,
138 /* The btrfs_fs_info created for self-tests */
139 BTRFS_FS_STATE_DUMMY_FS_INFO,
142 #define BTRFS_BACKREF_REV_MAX 256
143 #define BTRFS_BACKREF_REV_SHIFT 56
144 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
145 BTRFS_BACKREF_REV_SHIFT)
147 #define BTRFS_OLD_BACKREF_REV 0
148 #define BTRFS_MIXED_BACKREF_REV 1
151 * every tree block (leaf or node) starts with this header.
153 struct btrfs_header {
154 /* these first four must match the super block */
155 u8 csum[BTRFS_CSUM_SIZE];
156 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
157 __le64 bytenr; /* which block this node is supposed to live in */
160 /* allowed to be different from the super from here on down */
161 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
166 } __attribute__ ((__packed__));
169 * this is a very generous portion of the super block, giving us
170 * room to translate 14 chunks with 3 stripes each.
172 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
175 * just in case we somehow lose the roots and are not able to mount,
176 * we store an array of the roots from previous transactions
179 #define BTRFS_NUM_BACKUP_ROOTS 4
180 struct btrfs_root_backup {
182 __le64 tree_root_gen;
185 __le64 chunk_root_gen;
188 __le64 extent_root_gen;
197 __le64 csum_root_gen;
207 u8 extent_root_level;
211 /* future and to align */
213 } __attribute__ ((__packed__));
216 * the super block basically lists the main trees of the FS
217 * it currently lacks any block count etc etc
219 struct btrfs_super_block {
220 /* the first 4 fields must match struct btrfs_header */
221 u8 csum[BTRFS_CSUM_SIZE];
222 /* FS specific UUID, visible to user */
223 u8 fsid[BTRFS_FSID_SIZE];
224 __le64 bytenr; /* this block number */
227 /* allowed to be different from the btrfs_header from here own down */
234 /* this will help find the new super based on the log root */
235 __le64 log_root_transid;
238 __le64 root_dir_objectid;
242 __le32 __unused_leafsize;
244 __le32 sys_chunk_array_size;
245 __le64 chunk_root_generation;
247 __le64 compat_ro_flags;
248 __le64 incompat_flags;
253 struct btrfs_dev_item dev_item;
255 char label[BTRFS_LABEL_SIZE];
257 __le64 cache_generation;
258 __le64 uuid_tree_generation;
260 /* the UUID written into btree blocks */
261 u8 metadata_uuid[BTRFS_FSID_SIZE];
263 /* future expansion */
265 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
266 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
267 } __attribute__ ((__packed__));
270 * Compat flags that we support. If any incompat flags are set other than the
271 * ones specified below then we will fail to mount
273 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
274 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
275 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
277 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
278 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
279 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
281 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
282 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
284 #define BTRFS_FEATURE_INCOMPAT_SUPP \
285 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
286 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
287 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
288 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
289 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
290 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
291 BTRFS_FEATURE_INCOMPAT_RAID56 | \
292 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
293 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
294 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
295 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
296 BTRFS_FEATURE_INCOMPAT_RAID1C34)
298 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
299 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
300 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
303 * A leaf is full of items. offset and size tell us where to find
304 * the item in the leaf (relative to the start of the data area)
307 struct btrfs_disk_key key;
310 } __attribute__ ((__packed__));
313 * leaves have an item area and a data area:
314 * [item0, item1....itemN] [free space] [dataN...data1, data0]
316 * The data is separate from the items to get the keys closer together
320 struct btrfs_header header;
321 struct btrfs_item items[];
322 } __attribute__ ((__packed__));
325 * all non-leaf blocks are nodes, they hold only keys and pointers to
328 struct btrfs_key_ptr {
329 struct btrfs_disk_key key;
332 } __attribute__ ((__packed__));
335 struct btrfs_header header;
336 struct btrfs_key_ptr ptrs[];
337 } __attribute__ ((__packed__));
340 * btrfs_paths remember the path taken from the root down to the leaf.
341 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
342 * to any other levels that are present.
344 * The slots array records the index of the item or block pointer
345 * used while walking the tree.
347 enum { READA_NONE, READA_BACK, READA_FORWARD };
349 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
350 int slots[BTRFS_MAX_LEVEL];
351 /* if there is real range locking, this locks field will change */
352 u8 locks[BTRFS_MAX_LEVEL];
354 /* keep some upper locks as we walk down */
358 * set by btrfs_split_item, tells search_slot to keep all locks
359 * and to force calls to keep space in the nodes
361 unsigned int search_for_split:1;
362 unsigned int keep_locks:1;
363 unsigned int skip_locking:1;
364 unsigned int leave_spinning:1;
365 unsigned int search_commit_root:1;
366 unsigned int need_commit_sem:1;
367 unsigned int skip_release_on_error:1;
369 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
370 sizeof(struct btrfs_item))
371 struct btrfs_dev_replace {
372 u64 replace_state; /* see #define above */
373 time64_t time_started; /* seconds since 1-Jan-1970 */
374 time64_t time_stopped; /* seconds since 1-Jan-1970 */
375 atomic64_t num_write_errors;
376 atomic64_t num_uncorrectable_read_errors;
379 u64 committed_cursor_left;
380 u64 cursor_left_last_write_of_item;
383 u64 cont_reading_from_srcdev_mode; /* see #define above */
386 int item_needs_writeback;
387 struct btrfs_device *srcdev;
388 struct btrfs_device *tgtdev;
390 struct mutex lock_finishing_cancel_unmount;
391 struct rw_semaphore rwsem;
393 struct btrfs_scrub_progress scrub_progress;
395 struct percpu_counter bio_counter;
396 wait_queue_head_t replace_wait;
400 * free clusters are used to claim free space in relatively large chunks,
401 * allowing us to do less seeky writes. They are used for all metadata
402 * allocations. In ssd_spread mode they are also used for data allocations.
404 struct btrfs_free_cluster {
406 spinlock_t refill_lock;
409 /* largest extent in this cluster */
412 /* first extent starting offset */
415 /* We did a full search and couldn't create a cluster */
418 struct btrfs_block_group *block_group;
420 * when a cluster is allocated from a block group, we put the
421 * cluster onto a list in the block group so that it can
422 * be freed before the block group is freed.
424 struct list_head block_group_list;
427 enum btrfs_caching_type {
431 BTRFS_CACHE_FINISHED,
436 * Tree to record all locked full stripes of a RAID5/6 block group
438 struct btrfs_full_stripe_locks_tree {
443 /* Discard control. */
445 * Async discard uses multiple lists to differentiate the discard filter
446 * parameters. Index 0 is for completely free block groups where we need to
447 * ensure the entire block group is trimmed without being lossy. Indices
448 * afterwards represent monotonically decreasing discard filter sizes to
449 * prioritize what should be discarded next.
451 #define BTRFS_NR_DISCARD_LISTS 2
452 #define BTRFS_DISCARD_INDEX_UNUSED 0
453 #define BTRFS_DISCARD_INDEX_START 1
455 struct btrfs_discard_ctl {
456 struct workqueue_struct *discard_workers;
457 struct delayed_work work;
459 struct btrfs_block_group *block_group;
460 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
463 /* delayed seq elem */
465 struct list_head list;
469 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
471 #define SEQ_LAST ((u64)-1)
473 enum btrfs_orphan_cleanup_state {
474 ORPHAN_CLEANUP_STARTED = 1,
475 ORPHAN_CLEANUP_DONE = 2,
478 void btrfs_init_async_reclaim_work(struct work_struct *work);
481 struct reloc_control;
483 struct btrfs_fs_devices;
484 struct btrfs_balance_control;
485 struct btrfs_delayed_root;
488 * Block group or device which contains an active swapfile. Used for preventing
489 * unsafe operations while a swapfile is active.
491 * These are sorted on (ptr, inode) (note that a block group or device can
492 * contain more than one swapfile). We compare the pointer values because we
493 * don't actually care what the object is, we just need a quick check whether
494 * the object exists in the rbtree.
496 struct btrfs_swapfile_pin {
501 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
502 * points to a struct btrfs_device.
507 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
511 BTRFS_FS_CLOSING_START,
512 BTRFS_FS_CLOSING_DONE,
513 BTRFS_FS_LOG_RECOVERING,
515 BTRFS_FS_QUOTA_ENABLED,
516 BTRFS_FS_UPDATE_UUID_TREE_GEN,
517 BTRFS_FS_CREATING_FREE_SPACE_TREE,
521 BTRFS_FS_QUOTA_OVERRIDE,
522 /* Used to record internally whether fs has been frozen */
525 * Indicate that a whole-filesystem exclusive operation is running
526 * (device replace, resize, device add/delete, balance)
530 * To info transaction_kthread we need an immediate commit so it
531 * doesn't need to wait for commit_interval
533 BTRFS_FS_NEED_ASYNC_COMMIT,
535 * Indicate that balance has been set up from the ioctl and is in the
536 * main phase. The fs_info::balance_ctl is initialized.
537 * Set and cleared while holding fs_info::balance_mutex.
539 BTRFS_FS_BALANCE_RUNNING,
541 /* Indicate that the cleaner thread is awake and doing something. */
542 BTRFS_FS_CLEANER_RUNNING,
545 * The checksumming has an optimized version and is considered fast,
546 * so we don't need to offload checksums to workqueues.
548 BTRFS_FS_CSUM_IMPL_FAST,
550 /* Indicate that the discard workqueue can service discards. */
551 BTRFS_FS_DISCARD_RUNNING,
554 struct btrfs_fs_info {
555 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
557 struct btrfs_root *extent_root;
558 struct btrfs_root *tree_root;
559 struct btrfs_root *chunk_root;
560 struct btrfs_root *dev_root;
561 struct btrfs_root *fs_root;
562 struct btrfs_root *csum_root;
563 struct btrfs_root *quota_root;
564 struct btrfs_root *uuid_root;
565 struct btrfs_root *free_space_root;
567 /* the log root tree is a directory of all the other log roots */
568 struct btrfs_root *log_root_tree;
570 spinlock_t fs_roots_radix_lock;
571 struct radix_tree_root fs_roots_radix;
573 /* block group cache stuff */
574 spinlock_t block_group_cache_lock;
575 u64 first_logical_byte;
576 struct rb_root block_group_cache_tree;
578 /* keep track of unallocated space */
579 atomic64_t free_chunk_space;
581 struct extent_io_tree freed_extents[2];
582 struct extent_io_tree *pinned_extents;
584 /* logical->physical extent mapping */
585 struct extent_map_tree mapping_tree;
588 * block reservation for extent, checksum, root tree and
589 * delayed dir index item
591 struct btrfs_block_rsv global_block_rsv;
592 /* block reservation for metadata operations */
593 struct btrfs_block_rsv trans_block_rsv;
594 /* block reservation for chunk tree */
595 struct btrfs_block_rsv chunk_block_rsv;
596 /* block reservation for delayed operations */
597 struct btrfs_block_rsv delayed_block_rsv;
598 /* block reservation for delayed refs */
599 struct btrfs_block_rsv delayed_refs_rsv;
601 struct btrfs_block_rsv empty_block_rsv;
604 u64 last_trans_committed;
605 u64 avg_delayed_ref_runtime;
608 * this is updated to the current trans every time a full commit
609 * is required instead of the faster short fsync log commits
611 u64 last_trans_log_full_commit;
612 unsigned long mount_opt;
614 * Track requests for actions that need to be done during transaction
615 * commit (like for some mount options).
617 unsigned long pending_changes;
618 unsigned long compress_type:4;
619 unsigned int compress_level;
622 * It is a suggestive number, the read side is safe even it gets a
623 * wrong number because we will write out the data into a regular
624 * extent. The write side(mount/remount) is under ->s_umount lock,
625 * so it is also safe.
629 struct btrfs_transaction *running_transaction;
630 wait_queue_head_t transaction_throttle;
631 wait_queue_head_t transaction_wait;
632 wait_queue_head_t transaction_blocked_wait;
633 wait_queue_head_t async_submit_wait;
636 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
637 * when they are updated.
639 * Because we do not clear the flags for ever, so we needn't use
640 * the lock on the read side.
642 * We also needn't use the lock when we mount the fs, because
643 * there is no other task which will update the flag.
645 spinlock_t super_lock;
646 struct btrfs_super_block *super_copy;
647 struct btrfs_super_block *super_for_commit;
648 struct super_block *sb;
649 struct inode *btree_inode;
650 struct mutex tree_log_mutex;
651 struct mutex transaction_kthread_mutex;
652 struct mutex cleaner_mutex;
653 struct mutex chunk_mutex;
656 * this is taken to make sure we don't set block groups ro after
657 * the free space cache has been allocated on them
659 struct mutex ro_block_group_mutex;
661 /* this is used during read/modify/write to make sure
662 * no two ios are trying to mod the same stripe at the same
665 struct btrfs_stripe_hash_table *stripe_hash_table;
668 * this protects the ordered operations list only while we are
669 * processing all of the entries on it. This way we make
670 * sure the commit code doesn't find the list temporarily empty
671 * because another function happens to be doing non-waiting preflush
672 * before jumping into the main commit.
674 struct mutex ordered_operations_mutex;
676 struct rw_semaphore commit_root_sem;
678 struct rw_semaphore cleanup_work_sem;
680 struct rw_semaphore subvol_sem;
681 struct srcu_struct subvol_srcu;
683 spinlock_t trans_lock;
685 * the reloc mutex goes with the trans lock, it is taken
686 * during commit to protect us from the relocation code
688 struct mutex reloc_mutex;
690 struct list_head trans_list;
691 struct list_head dead_roots;
692 struct list_head caching_block_groups;
694 spinlock_t delayed_iput_lock;
695 struct list_head delayed_iputs;
696 atomic_t nr_delayed_iputs;
697 wait_queue_head_t delayed_iputs_wait;
699 /* this protects tree_mod_seq_list */
700 spinlock_t tree_mod_seq_lock;
701 atomic64_t tree_mod_seq;
702 struct list_head tree_mod_seq_list;
704 /* this protects tree_mod_log */
705 rwlock_t tree_mod_log_lock;
706 struct rb_root tree_mod_log;
708 atomic_t async_delalloc_pages;
711 * this is used to protect the following list -- ordered_roots.
713 spinlock_t ordered_root_lock;
716 * all fs/file tree roots in which there are data=ordered extents
717 * pending writeback are added into this list.
719 * these can span multiple transactions and basically include
720 * every dirty data page that isn't from nodatacow
722 struct list_head ordered_roots;
724 struct mutex delalloc_root_mutex;
725 spinlock_t delalloc_root_lock;
726 /* all fs/file tree roots that have delalloc inodes. */
727 struct list_head delalloc_roots;
730 * there is a pool of worker threads for checksumming during writes
731 * and a pool for checksumming after reads. This is because readers
732 * can run with FS locks held, and the writers may be waiting for
733 * those locks. We don't want ordering in the pending list to cause
734 * deadlocks, and so the two are serviced separately.
736 * A third pool does submit_bio to avoid deadlocking with the other
739 struct btrfs_workqueue *workers;
740 struct btrfs_workqueue *delalloc_workers;
741 struct btrfs_workqueue *flush_workers;
742 struct btrfs_workqueue *endio_workers;
743 struct btrfs_workqueue *endio_meta_workers;
744 struct btrfs_workqueue *endio_raid56_workers;
745 struct btrfs_workqueue *endio_repair_workers;
746 struct btrfs_workqueue *rmw_workers;
747 struct btrfs_workqueue *endio_meta_write_workers;
748 struct btrfs_workqueue *endio_write_workers;
749 struct btrfs_workqueue *endio_freespace_worker;
750 struct btrfs_workqueue *caching_workers;
751 struct btrfs_workqueue *readahead_workers;
754 * fixup workers take dirty pages that didn't properly go through
755 * the cow mechanism and make them safe to write. It happens
756 * for the sys_munmap function call path
758 struct btrfs_workqueue *fixup_workers;
759 struct btrfs_workqueue *delayed_workers;
761 struct task_struct *transaction_kthread;
762 struct task_struct *cleaner_kthread;
763 u32 thread_pool_size;
765 struct kobject *space_info_kobj;
769 /* used to keep from writing metadata until there is a nice batch */
770 struct percpu_counter dirty_metadata_bytes;
771 struct percpu_counter delalloc_bytes;
772 struct percpu_counter dio_bytes;
773 s32 dirty_metadata_batch;
776 struct list_head dirty_cowonly_roots;
778 struct btrfs_fs_devices *fs_devices;
781 * The space_info list is effectively read only after initial
782 * setup. It is populated at mount time and cleaned up after
783 * all block groups are removed. RCU is used to protect it.
785 struct list_head space_info;
787 struct btrfs_space_info *data_sinfo;
789 struct reloc_control *reloc_ctl;
791 /* data_alloc_cluster is only used in ssd_spread mode */
792 struct btrfs_free_cluster data_alloc_cluster;
794 /* all metadata allocations go through this cluster */
795 struct btrfs_free_cluster meta_alloc_cluster;
797 /* auto defrag inodes go here */
798 spinlock_t defrag_inodes_lock;
799 struct rb_root defrag_inodes;
800 atomic_t defrag_running;
802 /* Used to protect avail_{data, metadata, system}_alloc_bits */
803 seqlock_t profiles_lock;
805 * these three are in extended format (availability of single
806 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
807 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
809 u64 avail_data_alloc_bits;
810 u64 avail_metadata_alloc_bits;
811 u64 avail_system_alloc_bits;
813 /* restriper state */
814 spinlock_t balance_lock;
815 struct mutex balance_mutex;
816 atomic_t balance_pause_req;
817 atomic_t balance_cancel_req;
818 struct btrfs_balance_control *balance_ctl;
819 wait_queue_head_t balance_wait_q;
821 u32 data_chunk_allocations;
826 /* private scrub information */
827 struct mutex scrub_lock;
828 atomic_t scrubs_running;
829 atomic_t scrub_pause_req;
830 atomic_t scrubs_paused;
831 atomic_t scrub_cancel_req;
832 wait_queue_head_t scrub_pause_wait;
834 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
837 refcount_t scrub_workers_refcnt;
838 struct btrfs_workqueue *scrub_workers;
839 struct btrfs_workqueue *scrub_wr_completion_workers;
840 struct btrfs_workqueue *scrub_parity_workers;
842 struct btrfs_discard_ctl discard_ctl;
844 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
845 u32 check_integrity_print_mask;
847 /* is qgroup tracking in a consistent state? */
850 /* holds configuration and tracking. Protected by qgroup_lock */
851 struct rb_root qgroup_tree;
852 spinlock_t qgroup_lock;
855 * used to avoid frequently calling ulist_alloc()/ulist_free()
856 * when doing qgroup accounting, it must be protected by qgroup_lock.
858 struct ulist *qgroup_ulist;
860 /* protect user change for quota operations */
861 struct mutex qgroup_ioctl_lock;
863 /* list of dirty qgroups to be written at next commit */
864 struct list_head dirty_qgroups;
866 /* used by qgroup for an efficient tree traversal */
869 /* qgroup rescan items */
870 struct mutex qgroup_rescan_lock; /* protects the progress item */
871 struct btrfs_key qgroup_rescan_progress;
872 struct btrfs_workqueue *qgroup_rescan_workers;
873 struct completion qgroup_rescan_completion;
874 struct btrfs_work qgroup_rescan_work;
875 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
877 /* filesystem state */
878 unsigned long fs_state;
880 struct btrfs_delayed_root *delayed_root;
883 spinlock_t reada_lock;
884 struct radix_tree_root reada_tree;
886 /* readahead works cnt */
887 atomic_t reada_works_cnt;
889 /* Extent buffer radix tree */
890 spinlock_t buffer_lock;
891 struct radix_tree_root buffer_radix;
893 /* next backup root to be overwritten */
894 int backup_root_index;
896 /* device replace state */
897 struct btrfs_dev_replace dev_replace;
899 struct semaphore uuid_tree_rescan_sem;
901 /* Used to reclaim the metadata space in the background. */
902 struct work_struct async_reclaim_work;
904 spinlock_t unused_bgs_lock;
905 struct list_head unused_bgs;
906 struct mutex unused_bg_unpin_mutex;
907 struct mutex delete_unused_bgs_mutex;
909 /* Cached block sizes */
914 /* Block groups and devices containing active swapfiles. */
915 spinlock_t swapfile_pins_lock;
916 struct rb_root swapfile_pins;
918 struct crypto_shash *csum_shash;
921 * Number of send operations in progress.
922 * Updated while holding fs_info::balance_mutex.
924 int send_in_progress;
926 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
927 spinlock_t ref_verify_lock;
928 struct rb_root block_tree;
931 #ifdef CONFIG_BTRFS_DEBUG
932 struct kobject *debug_kobj;
936 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
938 return sb->s_fs_info;
941 struct btrfs_subvolume_writers {
942 struct percpu_counter counter;
943 wait_queue_head_t wait;
947 * The state of btrfs root
951 * btrfs_record_root_in_trans is a multi-step process, and it can race
952 * with the balancing code. But the race is very small, and only the
953 * first time the root is added to each transaction. So IN_TRANS_SETUP
954 * is used to tell us when more checks are required
956 BTRFS_ROOT_IN_TRANS_SETUP,
958 BTRFS_ROOT_TRACK_DIRTY,
960 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
961 BTRFS_ROOT_DEFRAG_RUNNING,
962 BTRFS_ROOT_FORCE_COW,
963 BTRFS_ROOT_MULTI_LOG_TASKS,
968 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
970 * Set for the subvolume tree owning the reloc tree.
972 BTRFS_ROOT_DEAD_RELOC_TREE,
973 /* Mark dead root stored on device whose cleanup needs to be resumed */
974 BTRFS_ROOT_DEAD_TREE,
978 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
979 * code. For detail check comment in fs/btrfs/qgroup.c.
981 struct btrfs_qgroup_swapped_blocks {
983 /* RM_EMPTY_ROOT() of above blocks[] */
985 struct rb_root blocks[BTRFS_MAX_LEVEL];
989 * in ram representation of the tree. extent_root is used for all allocations
990 * and for the extent tree extent_root root.
993 struct extent_buffer *node;
995 struct extent_buffer *commit_root;
996 struct btrfs_root *log_root;
997 struct btrfs_root *reloc_root;
1000 struct btrfs_root_item root_item;
1001 struct btrfs_key root_key;
1002 struct btrfs_fs_info *fs_info;
1003 struct extent_io_tree dirty_log_pages;
1005 struct mutex objectid_mutex;
1007 spinlock_t accounting_lock;
1008 struct btrfs_block_rsv *block_rsv;
1010 /* free ino cache stuff */
1011 struct btrfs_free_space_ctl *free_ino_ctl;
1012 enum btrfs_caching_type ino_cache_state;
1013 spinlock_t ino_cache_lock;
1014 wait_queue_head_t ino_cache_wait;
1015 struct btrfs_free_space_ctl *free_ino_pinned;
1016 u64 ino_cache_progress;
1017 struct inode *ino_cache_inode;
1019 struct mutex log_mutex;
1020 wait_queue_head_t log_writer_wait;
1021 wait_queue_head_t log_commit_wait[2];
1022 struct list_head log_ctxs[2];
1023 atomic_t log_writers;
1024 atomic_t log_commit[2];
1027 /* No matter the commit succeeds or not*/
1028 int log_transid_committed;
1029 /* Just be updated when the commit succeeds. */
1030 int last_log_commit;
1031 pid_t log_start_pid;
1037 u64 highest_objectid;
1039 u64 defrag_trans_start;
1040 struct btrfs_key defrag_progress;
1041 struct btrfs_key defrag_max;
1043 /* the dirty list is only used by non-reference counted roots */
1044 struct list_head dirty_list;
1046 struct list_head root_list;
1048 spinlock_t log_extents_lock[2];
1049 struct list_head logged_list[2];
1051 int orphan_cleanup_state;
1053 spinlock_t inode_lock;
1054 /* red-black tree that keeps track of in-memory inodes */
1055 struct rb_root inode_tree;
1058 * radix tree that keeps track of delayed nodes of every inode,
1059 * protected by inode_lock
1061 struct radix_tree_root delayed_nodes_tree;
1063 * right now this just gets used so that a root has its own devid
1064 * for stat. It may be used for more later
1068 spinlock_t root_item_lock;
1071 struct mutex delalloc_mutex;
1072 spinlock_t delalloc_lock;
1074 * all of the inodes that have delalloc bytes. It is possible for
1075 * this list to be empty even when there is still dirty data=ordered
1076 * extents waiting to finish IO.
1078 struct list_head delalloc_inodes;
1079 struct list_head delalloc_root;
1080 u64 nr_delalloc_inodes;
1082 struct mutex ordered_extent_mutex;
1084 * this is used by the balancing code to wait for all the pending
1087 spinlock_t ordered_extent_lock;
1090 * all of the data=ordered extents pending writeback
1091 * these can span multiple transactions and basically include
1092 * every dirty data page that isn't from nodatacow
1094 struct list_head ordered_extents;
1095 struct list_head ordered_root;
1096 u64 nr_ordered_extents;
1099 * Not empty if this subvolume root has gone through tree block swap
1102 * Will be used by reloc_control::dirty_subvol_roots.
1104 struct list_head reloc_dirty_list;
1107 * Number of currently running SEND ioctls to prevent
1108 * manipulation with the read-only status via SUBVOL_SETFLAGS
1110 int send_in_progress;
1112 * Number of currently running deduplication operations that have a
1113 * destination inode belonging to this root. Protected by the lock
1116 int dedupe_in_progress;
1117 struct btrfs_subvolume_writers *subv_writers;
1118 atomic_t will_be_snapshotted;
1119 atomic_t snapshot_force_cow;
1121 /* For qgroup metadata reserved space */
1122 spinlock_t qgroup_meta_rsv_lock;
1123 u64 qgroup_meta_rsv_pertrans;
1124 u64 qgroup_meta_rsv_prealloc;
1126 /* Number of active swapfiles */
1127 atomic_t nr_swapfiles;
1129 /* Record pairs of swapped blocks for qgroup */
1130 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1132 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1137 struct btrfs_clone_extent_info {
1147 struct btrfs_file_private {
1151 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1153 return btrfs_sb(inode->i_sb)->sectorsize;
1156 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1159 return info->nodesize - sizeof(struct btrfs_header);
1162 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1164 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1166 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1169 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1171 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1174 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1175 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1176 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1178 return BTRFS_MAX_ITEM_SIZE(info) -
1179 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1182 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1184 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1188 * Flags for mount options.
1190 * Note: don't forget to add new options to btrfs_show_options()
1192 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1193 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1194 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1195 #define BTRFS_MOUNT_SSD (1 << 3)
1196 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1197 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1198 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1199 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1200 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1201 #define BTRFS_MOUNT_NOSSD (1 << 9)
1202 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1203 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1204 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1205 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1206 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1207 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1208 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1209 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1210 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1211 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1212 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1213 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1214 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1215 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1216 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1217 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1218 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1219 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1220 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1221 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1223 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1224 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1226 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1227 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1228 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1229 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1232 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1234 if (!btrfs_test_opt(fs_info, opt)) \
1235 btrfs_info(fs_info, fmt, ##args); \
1236 btrfs_set_opt(fs_info->mount_opt, opt); \
1239 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1241 if (btrfs_test_opt(fs_info, opt)) \
1242 btrfs_info(fs_info, fmt, ##args); \
1243 btrfs_clear_opt(fs_info->mount_opt, opt); \
1247 * Requests for changes that need to be done during transaction commit.
1249 * Internal mount options that are used for special handling of the real
1250 * mount options (eg. cannot be set during remount and have to be set during
1251 * transaction commit)
1254 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1255 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1256 #define BTRFS_PENDING_COMMIT (2)
1258 #define btrfs_test_pending(info, opt) \
1259 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1260 #define btrfs_set_pending(info, opt) \
1261 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1262 #define btrfs_clear_pending(info, opt) \
1263 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1266 * Helpers for setting pending mount option changes.
1268 * Expects corresponding macros
1269 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1271 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1273 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1274 btrfs_info((info), fmt, ##args); \
1275 btrfs_set_pending((info), SET_##opt); \
1276 btrfs_clear_pending((info), CLEAR_##opt); \
1280 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1282 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1283 btrfs_info((info), fmt, ##args); \
1284 btrfs_set_pending((info), CLEAR_##opt); \
1285 btrfs_clear_pending((info), SET_##opt); \
1292 #define BTRFS_INODE_NODATASUM (1 << 0)
1293 #define BTRFS_INODE_NODATACOW (1 << 1)
1294 #define BTRFS_INODE_READONLY (1 << 2)
1295 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1296 #define BTRFS_INODE_PREALLOC (1 << 4)
1297 #define BTRFS_INODE_SYNC (1 << 5)
1298 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1299 #define BTRFS_INODE_APPEND (1 << 7)
1300 #define BTRFS_INODE_NODUMP (1 << 8)
1301 #define BTRFS_INODE_NOATIME (1 << 9)
1302 #define BTRFS_INODE_DIRSYNC (1 << 10)
1303 #define BTRFS_INODE_COMPRESS (1 << 11)
1305 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1307 #define BTRFS_INODE_FLAG_MASK \
1308 (BTRFS_INODE_NODATASUM | \
1309 BTRFS_INODE_NODATACOW | \
1310 BTRFS_INODE_READONLY | \
1311 BTRFS_INODE_NOCOMPRESS | \
1312 BTRFS_INODE_PREALLOC | \
1313 BTRFS_INODE_SYNC | \
1314 BTRFS_INODE_IMMUTABLE | \
1315 BTRFS_INODE_APPEND | \
1316 BTRFS_INODE_NODUMP | \
1317 BTRFS_INODE_NOATIME | \
1318 BTRFS_INODE_DIRSYNC | \
1319 BTRFS_INODE_COMPRESS | \
1320 BTRFS_INODE_ROOT_ITEM_INIT)
1322 struct btrfs_map_token {
1323 const struct extent_buffer *eb;
1325 unsigned long offset;
1328 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1329 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1331 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1332 struct extent_buffer *eb)
1335 token->kaddr = NULL;
1338 /* some macros to generate set/get functions for the struct fields. This
1339 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1342 #define le8_to_cpu(v) (v)
1343 #define cpu_to_le8(v) (v)
1346 #define read_eb_member(eb, ptr, type, member, result) (\
1347 read_extent_buffer(eb, (char *)(result), \
1348 ((unsigned long)(ptr)) + \
1349 offsetof(type, member), \
1350 sizeof(((type *)0)->member)))
1352 #define write_eb_member(eb, ptr, type, member, result) (\
1353 write_extent_buffer(eb, (char *)(result), \
1354 ((unsigned long)(ptr)) + \
1355 offsetof(type, member), \
1356 sizeof(((type *)0)->member)))
1358 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1359 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1360 const void *ptr, unsigned long off, \
1361 struct btrfs_map_token *token); \
1362 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1363 unsigned long off, u##bits val, \
1364 struct btrfs_map_token *token); \
1365 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1366 const void *ptr, unsigned long off); \
1367 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1368 unsigned long off, u##bits val);
1370 DECLARE_BTRFS_SETGET_BITS(8)
1371 DECLARE_BTRFS_SETGET_BITS(16)
1372 DECLARE_BTRFS_SETGET_BITS(32)
1373 DECLARE_BTRFS_SETGET_BITS(64)
1375 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1376 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1379 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1380 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1382 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1385 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1386 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1388 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1390 struct btrfs_map_token *token) \
1392 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1393 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1395 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1396 type *s, u##bits val, \
1397 struct btrfs_map_token *token) \
1399 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1400 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1403 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1404 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1406 const type *p = page_address(eb->pages[0]); \
1407 u##bits res = le##bits##_to_cpu(p->member); \
1410 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1413 type *p = page_address(eb->pages[0]); \
1414 p->member = cpu_to_le##bits(val); \
1417 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1418 static inline u##bits btrfs_##name(const type *s) \
1420 return le##bits##_to_cpu(s->member); \
1422 static inline void btrfs_set_##name(type *s, u##bits val) \
1424 s->member = cpu_to_le##bits(val); \
1428 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1429 struct btrfs_dev_item *s)
1431 BUILD_BUG_ON(sizeof(u64) !=
1432 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1433 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1436 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1437 struct btrfs_dev_item *s,
1440 BUILD_BUG_ON(sizeof(u64) !=
1441 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1442 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1443 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1447 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1448 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1449 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1450 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1451 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1453 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1454 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1455 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1456 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1457 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1458 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1460 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1465 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1467 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1469 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1471 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1472 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1474 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1476 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1478 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1481 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1483 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1486 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1488 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1491 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1492 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1493 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1494 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1495 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1496 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1497 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1498 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1499 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1500 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1501 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1503 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1505 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1509 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1512 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1514 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1516 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1518 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1519 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1521 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1523 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1524 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1526 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1529 unsigned long offset = (unsigned long)c;
1530 offset += offsetof(struct btrfs_chunk, stripe);
1531 offset += nr * sizeof(struct btrfs_stripe);
1532 return (struct btrfs_stripe *)offset;
1535 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1537 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1540 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1541 struct btrfs_chunk *c, int nr)
1543 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1546 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1547 struct btrfs_chunk *c, int nr)
1549 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1552 /* struct btrfs_block_group_item */
1553 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1555 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1557 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1558 struct btrfs_block_group_item, chunk_objectid, 64);
1560 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1561 struct btrfs_block_group_item, chunk_objectid, 64);
1562 BTRFS_SETGET_FUNCS(block_group_flags,
1563 struct btrfs_block_group_item, flags, 64);
1564 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1565 struct btrfs_block_group_item, flags, 64);
1567 /* struct btrfs_free_space_info */
1568 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1570 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1572 /* struct btrfs_inode_ref */
1573 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1574 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1576 /* struct btrfs_inode_extref */
1577 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1578 parent_objectid, 64);
1579 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1581 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1583 /* struct btrfs_inode_item */
1584 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1585 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1586 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1587 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1588 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1589 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1590 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1591 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1592 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1593 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1594 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1595 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1596 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1598 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1600 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1602 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1603 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1605 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1607 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1608 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1609 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1610 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1611 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1612 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1613 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1614 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1615 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1618 /* struct btrfs_dev_extent */
1619 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1621 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1622 chunk_objectid, 64);
1623 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1625 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1627 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1629 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1630 return (unsigned long)dev + ptr;
1633 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1634 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1636 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1638 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1641 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1643 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1644 struct btrfs_tree_block_info *item,
1645 struct btrfs_disk_key *key)
1647 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1650 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1651 struct btrfs_tree_block_info *item,
1652 struct btrfs_disk_key *key)
1654 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1657 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1659 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1661 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1663 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1666 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1669 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1671 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1674 static inline u32 btrfs_extent_inline_ref_size(int type)
1676 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1677 type == BTRFS_SHARED_BLOCK_REF_KEY)
1678 return sizeof(struct btrfs_extent_inline_ref);
1679 if (type == BTRFS_SHARED_DATA_REF_KEY)
1680 return sizeof(struct btrfs_shared_data_ref) +
1681 sizeof(struct btrfs_extent_inline_ref);
1682 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1683 return sizeof(struct btrfs_extent_data_ref) +
1684 offsetof(struct btrfs_extent_inline_ref, offset);
1688 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1689 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1691 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1692 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1694 /* struct btrfs_node */
1695 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1696 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1697 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1699 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1702 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1705 ptr = offsetof(struct btrfs_node, ptrs) +
1706 sizeof(struct btrfs_key_ptr) * nr;
1707 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1710 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1714 ptr = offsetof(struct btrfs_node, ptrs) +
1715 sizeof(struct btrfs_key_ptr) * nr;
1716 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1719 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1722 ptr = offsetof(struct btrfs_node, ptrs) +
1723 sizeof(struct btrfs_key_ptr) * nr;
1724 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1727 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1731 ptr = offsetof(struct btrfs_node, ptrs) +
1732 sizeof(struct btrfs_key_ptr) * nr;
1733 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1736 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1738 return offsetof(struct btrfs_node, ptrs) +
1739 sizeof(struct btrfs_key_ptr) * nr;
1742 void btrfs_node_key(const struct extent_buffer *eb,
1743 struct btrfs_disk_key *disk_key, int nr);
1745 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1746 struct btrfs_disk_key *disk_key, int nr)
1749 ptr = btrfs_node_key_ptr_offset(nr);
1750 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1751 struct btrfs_key_ptr, key, disk_key);
1754 /* struct btrfs_item */
1755 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1756 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1757 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1758 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1760 static inline unsigned long btrfs_item_nr_offset(int nr)
1762 return offsetof(struct btrfs_leaf, items) +
1763 sizeof(struct btrfs_item) * nr;
1766 static inline struct btrfs_item *btrfs_item_nr(int nr)
1768 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1771 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1772 struct btrfs_item *item)
1774 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1777 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1779 return btrfs_item_end(eb, btrfs_item_nr(nr));
1782 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1784 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1787 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1789 return btrfs_item_size(eb, btrfs_item_nr(nr));
1792 static inline void btrfs_item_key(const struct extent_buffer *eb,
1793 struct btrfs_disk_key *disk_key, int nr)
1795 struct btrfs_item *item = btrfs_item_nr(nr);
1796 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1799 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1800 struct btrfs_disk_key *disk_key, int nr)
1802 struct btrfs_item *item = btrfs_item_nr(nr);
1803 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1806 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1809 * struct btrfs_root_ref
1811 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1812 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1813 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1815 /* struct btrfs_dir_item */
1816 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1817 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1818 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1819 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1820 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1821 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1823 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1825 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1828 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1829 const struct btrfs_dir_item *item,
1830 struct btrfs_disk_key *key)
1832 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1835 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1836 struct btrfs_dir_item *item,
1837 const struct btrfs_disk_key *key)
1839 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1842 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1844 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1846 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1849 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1850 const struct btrfs_free_space_header *h,
1851 struct btrfs_disk_key *key)
1853 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1856 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1857 struct btrfs_free_space_header *h,
1858 const struct btrfs_disk_key *key)
1860 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1863 /* struct btrfs_disk_key */
1864 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1866 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1867 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1869 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1870 const struct btrfs_disk_key *disk)
1872 cpu->offset = le64_to_cpu(disk->offset);
1873 cpu->type = disk->type;
1874 cpu->objectid = le64_to_cpu(disk->objectid);
1877 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1878 const struct btrfs_key *cpu)
1880 disk->offset = cpu_to_le64(cpu->offset);
1881 disk->type = cpu->type;
1882 disk->objectid = cpu_to_le64(cpu->objectid);
1885 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1886 struct btrfs_key *key, int nr)
1888 struct btrfs_disk_key disk_key;
1889 btrfs_node_key(eb, &disk_key, nr);
1890 btrfs_disk_key_to_cpu(key, &disk_key);
1893 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1894 struct btrfs_key *key, int nr)
1896 struct btrfs_disk_key disk_key;
1897 btrfs_item_key(eb, &disk_key, nr);
1898 btrfs_disk_key_to_cpu(key, &disk_key);
1901 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1902 const struct btrfs_dir_item *item,
1903 struct btrfs_key *key)
1905 struct btrfs_disk_key disk_key;
1906 btrfs_dir_item_key(eb, item, &disk_key);
1907 btrfs_disk_key_to_cpu(key, &disk_key);
1910 /* struct btrfs_header */
1911 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1912 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1914 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1915 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1916 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1917 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1918 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1920 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1921 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1923 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1925 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1927 return (btrfs_header_flags(eb) & flag) == flag;
1930 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1932 u64 flags = btrfs_header_flags(eb);
1933 btrfs_set_header_flags(eb, flags | flag);
1936 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1938 u64 flags = btrfs_header_flags(eb);
1939 btrfs_set_header_flags(eb, flags & ~flag);
1942 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1944 u64 flags = btrfs_header_flags(eb);
1945 return flags >> BTRFS_BACKREF_REV_SHIFT;
1948 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1951 u64 flags = btrfs_header_flags(eb);
1952 flags &= ~BTRFS_BACKREF_REV_MASK;
1953 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1954 btrfs_set_header_flags(eb, flags);
1957 static inline unsigned long btrfs_header_fsid(void)
1959 return offsetof(struct btrfs_header, fsid);
1962 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
1964 return offsetof(struct btrfs_header, chunk_tree_uuid);
1967 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1969 return btrfs_header_level(eb) == 0;
1972 /* struct btrfs_root_item */
1973 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1975 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1976 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1977 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1979 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1981 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1982 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1983 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1984 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1985 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1986 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1987 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1988 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1990 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1992 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1994 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1996 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1998 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2001 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2003 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2006 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2008 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2011 /* struct btrfs_root_backup */
2012 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2014 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2016 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2017 tree_root_level, 8);
2019 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2021 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2022 chunk_root_gen, 64);
2023 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2024 chunk_root_level, 8);
2026 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2028 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2029 extent_root_gen, 64);
2030 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2031 extent_root_level, 8);
2033 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2035 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2037 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2040 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2042 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2044 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2047 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2049 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2051 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2052 csum_root_level, 8);
2053 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2055 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2057 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2060 /* struct btrfs_balance_item */
2061 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2063 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2064 const struct btrfs_balance_item *bi,
2065 struct btrfs_disk_balance_args *ba)
2067 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2070 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2071 struct btrfs_balance_item *bi,
2072 const struct btrfs_disk_balance_args *ba)
2074 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2077 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2078 const struct btrfs_balance_item *bi,
2079 struct btrfs_disk_balance_args *ba)
2081 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2084 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2085 struct btrfs_balance_item *bi,
2086 const struct btrfs_disk_balance_args *ba)
2088 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2091 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2092 const struct btrfs_balance_item *bi,
2093 struct btrfs_disk_balance_args *ba)
2095 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2098 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2099 struct btrfs_balance_item *bi,
2100 const struct btrfs_disk_balance_args *ba)
2102 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2106 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2107 const struct btrfs_disk_balance_args *disk)
2109 memset(cpu, 0, sizeof(*cpu));
2111 cpu->profiles = le64_to_cpu(disk->profiles);
2112 cpu->usage = le64_to_cpu(disk->usage);
2113 cpu->devid = le64_to_cpu(disk->devid);
2114 cpu->pstart = le64_to_cpu(disk->pstart);
2115 cpu->pend = le64_to_cpu(disk->pend);
2116 cpu->vstart = le64_to_cpu(disk->vstart);
2117 cpu->vend = le64_to_cpu(disk->vend);
2118 cpu->target = le64_to_cpu(disk->target);
2119 cpu->flags = le64_to_cpu(disk->flags);
2120 cpu->limit = le64_to_cpu(disk->limit);
2121 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2122 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2126 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2127 const struct btrfs_balance_args *cpu)
2129 memset(disk, 0, sizeof(*disk));
2131 disk->profiles = cpu_to_le64(cpu->profiles);
2132 disk->usage = cpu_to_le64(cpu->usage);
2133 disk->devid = cpu_to_le64(cpu->devid);
2134 disk->pstart = cpu_to_le64(cpu->pstart);
2135 disk->pend = cpu_to_le64(cpu->pend);
2136 disk->vstart = cpu_to_le64(cpu->vstart);
2137 disk->vend = cpu_to_le64(cpu->vend);
2138 disk->target = cpu_to_le64(cpu->target);
2139 disk->flags = cpu_to_le64(cpu->flags);
2140 disk->limit = cpu_to_le64(cpu->limit);
2141 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2142 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2145 /* struct btrfs_super_block */
2146 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2147 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2148 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2150 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2151 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2152 struct btrfs_super_block, sys_chunk_array_size, 32);
2153 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2154 struct btrfs_super_block, chunk_root_generation, 64);
2155 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2157 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2159 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2160 chunk_root_level, 8);
2161 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2163 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2164 log_root_transid, 64);
2165 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2167 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2169 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2171 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2173 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2175 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2177 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2178 root_dir_objectid, 64);
2179 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2181 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2183 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2184 compat_ro_flags, 64);
2185 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2186 incompat_flags, 64);
2187 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2189 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2190 cache_generation, 64);
2191 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2192 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2193 uuid_tree_generation, 64);
2195 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2196 const char *btrfs_super_csum_name(u16 csum_type);
2197 const char *btrfs_super_csum_driver(u16 csum_type);
2198 size_t __const btrfs_get_num_csums(void);
2202 * The leaf data grows from end-to-front in the node.
2203 * this returns the address of the start of the last item,
2204 * which is the stop of the leaf data stack
2206 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2208 u32 nr = btrfs_header_nritems(leaf);
2211 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2212 return btrfs_item_offset_nr(leaf, nr - 1);
2215 /* struct btrfs_file_extent_item */
2216 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2217 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2218 struct btrfs_file_extent_item, disk_bytenr, 64);
2219 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2220 struct btrfs_file_extent_item, offset, 64);
2221 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2222 struct btrfs_file_extent_item, generation, 64);
2223 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2224 struct btrfs_file_extent_item, num_bytes, 64);
2225 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2226 struct btrfs_file_extent_item, disk_num_bytes, 64);
2227 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2228 struct btrfs_file_extent_item, compression, 8);
2230 static inline unsigned long
2231 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2233 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2236 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2238 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2241 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2243 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2245 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2246 disk_num_bytes, 64);
2247 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2249 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2251 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2253 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2255 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2257 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2258 other_encoding, 16);
2261 * this returns the number of bytes used by the item on disk, minus the
2262 * size of any extent headers. If a file is compressed on disk, this is
2263 * the compressed size
2265 static inline u32 btrfs_file_extent_inline_item_len(
2266 const struct extent_buffer *eb,
2267 struct btrfs_item *e)
2269 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2272 /* btrfs_qgroup_status_item */
2273 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2275 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2277 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2279 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2282 /* btrfs_qgroup_info_item */
2283 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2285 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2286 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2288 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2289 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2292 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2293 struct btrfs_qgroup_info_item, generation, 64);
2294 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2296 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2297 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2298 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2300 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2301 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2303 /* btrfs_qgroup_limit_item */
2304 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2306 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2308 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2310 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2312 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2315 /* btrfs_dev_replace_item */
2316 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2317 struct btrfs_dev_replace_item, src_devid, 64);
2318 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2319 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2321 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2323 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2325 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2327 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2328 num_write_errors, 64);
2329 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2330 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2332 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2334 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2337 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2338 struct btrfs_dev_replace_item, src_devid, 64);
2339 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2340 struct btrfs_dev_replace_item,
2341 cont_reading_from_srcdev_mode, 64);
2342 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2343 struct btrfs_dev_replace_item, replace_state, 64);
2344 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2345 struct btrfs_dev_replace_item, time_started, 64);
2346 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2347 struct btrfs_dev_replace_item, time_stopped, 64);
2348 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2349 struct btrfs_dev_replace_item, num_write_errors, 64);
2350 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2351 struct btrfs_dev_replace_item,
2352 num_uncorrectable_read_errors, 64);
2353 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2354 struct btrfs_dev_replace_item, cursor_left, 64);
2355 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2356 struct btrfs_dev_replace_item, cursor_right, 64);
2358 /* helper function to cast into the data area of the leaf. */
2359 #define btrfs_item_ptr(leaf, slot, type) \
2360 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2361 btrfs_item_offset_nr(leaf, slot)))
2363 #define btrfs_item_ptr_offset(leaf, slot) \
2364 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2365 btrfs_item_offset_nr(leaf, slot)))
2367 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2369 return crc32c(crc, address, length);
2372 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2374 put_unaligned_le32(~crc, result);
2377 static inline u64 btrfs_name_hash(const char *name, int len)
2379 return crc32c((u32)~1, name, len);
2383 * Figure the key offset of an extended inode ref
2385 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2388 return (u64) crc32c(parent_objectid, name, len);
2391 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2393 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2398 enum btrfs_inline_ref_type {
2399 BTRFS_REF_TYPE_INVALID,
2400 BTRFS_REF_TYPE_BLOCK,
2401 BTRFS_REF_TYPE_DATA,
2405 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2406 struct btrfs_extent_inline_ref *iref,
2407 enum btrfs_inline_ref_type is_data);
2408 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2410 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2413 * Use this if we would be adding new items, as we could split nodes as we cow
2416 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2419 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2423 * Doing a truncate or a modification won't result in new nodes or leaves, just
2424 * what we need for COW.
2426 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2429 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2432 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2433 u64 start, u64 num_bytes);
2434 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2435 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2436 unsigned long count);
2437 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2438 struct btrfs_delayed_ref_root *delayed_refs,
2439 struct btrfs_delayed_ref_head *head);
2440 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2441 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2442 struct btrfs_fs_info *fs_info, u64 bytenr,
2443 u64 offset, int metadata, u64 *refs, u64 *flags);
2444 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2445 u64 bytenr, u64 num, int reserved);
2446 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2447 u64 bytenr, u64 num_bytes);
2448 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2449 int btrfs_cross_ref_exist(struct btrfs_root *root,
2450 u64 objectid, u64 offset, u64 bytenr);
2451 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2452 struct btrfs_root *root,
2453 u64 parent, u64 root_objectid,
2454 const struct btrfs_disk_key *key,
2455 int level, u64 hint,
2457 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2458 struct btrfs_root *root,
2459 struct extent_buffer *buf,
2460 u64 parent, int last_ref);
2461 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2462 struct btrfs_root *root, u64 owner,
2463 u64 offset, u64 ram_bytes,
2464 struct btrfs_key *ins);
2465 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2466 u64 root_objectid, u64 owner, u64 offset,
2467 struct btrfs_key *ins);
2468 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2469 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2470 struct btrfs_key *ins, int is_data, int delalloc);
2471 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2472 struct extent_buffer *buf, int full_backref);
2473 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2474 struct extent_buffer *buf, int full_backref);
2475 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2476 u64 bytenr, u64 num_bytes, u64 flags,
2477 int level, int is_data);
2478 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2480 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2481 u64 start, u64 len, int delalloc);
2482 int btrfs_pin_reserved_extent(struct btrfs_fs_info *fs_info, u64 start,
2484 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2485 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2486 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2487 struct btrfs_ref *generic_ref);
2489 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2490 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache);
2491 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache);
2492 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2494 enum btrfs_reserve_flush_enum {
2495 /* If we are in the transaction, we can't flush anything.*/
2496 BTRFS_RESERVE_NO_FLUSH,
2498 * Flushing delalloc may cause deadlock somewhere, in this
2499 * case, use FLUSH LIMIT
2501 BTRFS_RESERVE_FLUSH_LIMIT,
2502 BTRFS_RESERVE_FLUSH_EVICT,
2503 BTRFS_RESERVE_FLUSH_ALL,
2506 enum btrfs_flush_state {
2507 FLUSH_DELAYED_ITEMS_NR = 1,
2508 FLUSH_DELAYED_ITEMS = 2,
2509 FLUSH_DELAYED_REFS_NR = 3,
2510 FLUSH_DELAYED_REFS = 4,
2512 FLUSH_DELALLOC_WAIT = 6,
2514 ALLOC_CHUNK_FORCE = 8,
2515 RUN_DELAYED_IPUTS = 9,
2519 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2520 struct btrfs_block_rsv *rsv,
2521 int nitems, bool use_global_rsv);
2522 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2523 struct btrfs_block_rsv *rsv);
2524 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2526 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2527 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2528 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2529 u64 start, u64 end);
2530 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2531 u64 num_bytes, u64 *actual_bytes);
2532 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2534 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2535 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2536 struct btrfs_fs_info *fs_info);
2537 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2538 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2539 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2542 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2543 int level, int *slot);
2544 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2545 int btrfs_previous_item(struct btrfs_root *root,
2546 struct btrfs_path *path, u64 min_objectid,
2548 int btrfs_previous_extent_item(struct btrfs_root *root,
2549 struct btrfs_path *path, u64 min_objectid);
2550 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2551 struct btrfs_path *path,
2552 const struct btrfs_key *new_key);
2553 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2554 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2555 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2556 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2557 struct btrfs_key *key, int lowest_level,
2559 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2560 struct btrfs_path *path,
2562 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2565 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2566 struct btrfs_root *root, struct extent_buffer *buf,
2567 struct extent_buffer *parent, int parent_slot,
2568 struct extent_buffer **cow_ret);
2569 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2570 struct btrfs_root *root,
2571 struct extent_buffer *buf,
2572 struct extent_buffer **cow_ret, u64 new_root_objectid);
2573 int btrfs_block_can_be_shared(struct btrfs_root *root,
2574 struct extent_buffer *buf);
2575 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2576 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2577 int btrfs_split_item(struct btrfs_trans_handle *trans,
2578 struct btrfs_root *root,
2579 struct btrfs_path *path,
2580 const struct btrfs_key *new_key,
2581 unsigned long split_offset);
2582 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2583 struct btrfs_root *root,
2584 struct btrfs_path *path,
2585 const struct btrfs_key *new_key);
2586 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2587 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2588 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2589 const struct btrfs_key *key, struct btrfs_path *p,
2590 int ins_len, int cow);
2591 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2592 struct btrfs_path *p, u64 time_seq);
2593 int btrfs_search_slot_for_read(struct btrfs_root *root,
2594 const struct btrfs_key *key,
2595 struct btrfs_path *p, int find_higher,
2597 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2598 struct btrfs_root *root, struct extent_buffer *parent,
2599 int start_slot, u64 *last_ret,
2600 struct btrfs_key *progress);
2601 void btrfs_release_path(struct btrfs_path *p);
2602 struct btrfs_path *btrfs_alloc_path(void);
2603 void btrfs_free_path(struct btrfs_path *p);
2605 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2606 struct btrfs_path *path, int slot, int nr);
2607 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2608 struct btrfs_root *root,
2609 struct btrfs_path *path)
2611 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2614 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2615 const struct btrfs_key *cpu_key, u32 *data_size,
2616 u32 total_data, u32 total_size, int nr);
2617 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2618 const struct btrfs_key *key, void *data, u32 data_size);
2619 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2620 struct btrfs_root *root,
2621 struct btrfs_path *path,
2622 const struct btrfs_key *cpu_key, u32 *data_size,
2625 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2626 struct btrfs_root *root,
2627 struct btrfs_path *path,
2628 const struct btrfs_key *key,
2631 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2634 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2635 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2636 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2638 static inline int btrfs_next_old_item(struct btrfs_root *root,
2639 struct btrfs_path *p, u64 time_seq)
2642 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2643 return btrfs_next_old_leaf(root, p, time_seq);
2646 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2648 return btrfs_next_old_item(root, p, 0);
2650 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2651 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2652 struct btrfs_block_rsv *block_rsv,
2653 int update_ref, int for_reloc);
2654 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2655 struct btrfs_root *root,
2656 struct extent_buffer *node,
2657 struct extent_buffer *parent);
2658 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2661 * Do it this way so we only ever do one test_bit in the normal case.
2663 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2664 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2672 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2673 * anything except sleeping. This function is used to check the status of
2676 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2678 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2681 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2683 kfree(fs_info->balance_ctl);
2684 kfree(fs_info->delayed_root);
2685 kfree(fs_info->extent_root);
2686 kfree(fs_info->tree_root);
2687 kfree(fs_info->chunk_root);
2688 kfree(fs_info->dev_root);
2689 kfree(fs_info->csum_root);
2690 kfree(fs_info->quota_root);
2691 kfree(fs_info->uuid_root);
2692 kfree(fs_info->free_space_root);
2693 kfree(fs_info->super_copy);
2694 kfree(fs_info->super_for_commit);
2698 /* tree mod log functions from ctree.c */
2699 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2700 struct seq_list *elem);
2701 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2702 struct seq_list *elem);
2703 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2706 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2707 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2709 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2710 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2712 int btrfs_del_root(struct btrfs_trans_handle *trans,
2713 const struct btrfs_key *key);
2714 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2715 const struct btrfs_key *key,
2716 struct btrfs_root_item *item);
2717 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2718 struct btrfs_root *root,
2719 struct btrfs_key *key,
2720 struct btrfs_root_item *item);
2721 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2722 struct btrfs_path *path, struct btrfs_root_item *root_item,
2723 struct btrfs_key *root_key);
2724 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2725 void btrfs_set_root_node(struct btrfs_root_item *item,
2726 struct extent_buffer *node);
2727 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2728 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2729 struct btrfs_root *root);
2732 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2734 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2736 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2737 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2741 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2742 const char *name, int name_len);
2743 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2744 int name_len, struct btrfs_inode *dir,
2745 struct btrfs_key *location, u8 type, u64 index);
2746 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2747 struct btrfs_root *root,
2748 struct btrfs_path *path, u64 dir,
2749 const char *name, int name_len,
2751 struct btrfs_dir_item *
2752 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2753 struct btrfs_root *root,
2754 struct btrfs_path *path, u64 dir,
2755 u64 objectid, const char *name, int name_len,
2757 struct btrfs_dir_item *
2758 btrfs_search_dir_index_item(struct btrfs_root *root,
2759 struct btrfs_path *path, u64 dirid,
2760 const char *name, int name_len);
2761 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2762 struct btrfs_root *root,
2763 struct btrfs_path *path,
2764 struct btrfs_dir_item *di);
2765 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2766 struct btrfs_root *root,
2767 struct btrfs_path *path, u64 objectid,
2768 const char *name, u16 name_len,
2769 const void *data, u16 data_len);
2770 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2771 struct btrfs_root *root,
2772 struct btrfs_path *path, u64 dir,
2773 const char *name, u16 name_len,
2775 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2776 struct btrfs_path *path,
2781 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2782 struct btrfs_root *root, u64 offset);
2783 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2784 struct btrfs_root *root, u64 offset);
2785 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2788 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2789 struct btrfs_root *root,
2790 const char *name, int name_len,
2791 u64 inode_objectid, u64 ref_objectid, u64 index);
2792 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2793 struct btrfs_root *root,
2794 const char *name, int name_len,
2795 u64 inode_objectid, u64 ref_objectid, u64 *index);
2796 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2797 struct btrfs_root *root,
2798 struct btrfs_path *path, u64 objectid);
2799 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2800 *root, struct btrfs_path *path,
2801 struct btrfs_key *location, int mod);
2803 struct btrfs_inode_extref *
2804 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2805 struct btrfs_root *root,
2806 struct btrfs_path *path,
2807 const char *name, int name_len,
2808 u64 inode_objectid, u64 ref_objectid, int ins_len,
2811 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2812 int slot, const char *name,
2814 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2815 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2816 const char *name, int name_len);
2818 struct btrfs_dio_private;
2819 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2820 struct btrfs_root *root, u64 bytenr, u64 len);
2821 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2822 u64 offset, u8 *dst);
2823 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2824 struct btrfs_root *root,
2825 u64 objectid, u64 pos,
2826 u64 disk_offset, u64 disk_num_bytes,
2827 u64 num_bytes, u64 offset, u64 ram_bytes,
2828 u8 compression, u8 encryption, u16 other_encoding);
2829 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2830 struct btrfs_root *root,
2831 struct btrfs_path *path, u64 objectid,
2832 u64 bytenr, int mod);
2833 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2834 struct btrfs_root *root,
2835 struct btrfs_ordered_sum *sums);
2836 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2837 u64 file_start, int contig);
2838 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2839 struct list_head *list, int search_commit);
2840 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2841 const struct btrfs_path *path,
2842 struct btrfs_file_extent_item *fi,
2843 const bool new_inline,
2844 struct extent_map *em);
2847 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2848 u64 start, u64 len);
2849 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2850 u64 *orig_start, u64 *orig_block_len,
2853 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2854 struct btrfs_inode *inode);
2855 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2856 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2857 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2858 struct btrfs_root *root,
2859 struct btrfs_inode *dir, struct btrfs_inode *inode,
2860 const char *name, int name_len);
2861 int btrfs_add_link(struct btrfs_trans_handle *trans,
2862 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2863 const char *name, int name_len, int add_backref, u64 index);
2864 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2865 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2867 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2868 struct btrfs_root *root,
2869 struct inode *inode, u64 new_size,
2872 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2873 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2874 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2875 unsigned int extra_bits,
2876 struct extent_state **cached_state);
2877 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2878 struct btrfs_root *new_root,
2879 struct btrfs_root *parent_root,
2881 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2883 void btrfs_clear_delalloc_extent(struct inode *inode,
2884 struct extent_state *state, unsigned *bits);
2885 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2886 struct extent_state *other);
2887 void btrfs_split_delalloc_extent(struct inode *inode,
2888 struct extent_state *orig, u64 split);
2889 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2890 unsigned long bio_flags);
2891 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2892 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2893 int btrfs_readpage(struct file *file, struct page *page);
2894 void btrfs_evict_inode(struct inode *inode);
2895 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2896 struct inode *btrfs_alloc_inode(struct super_block *sb);
2897 void btrfs_destroy_inode(struct inode *inode);
2898 void btrfs_free_inode(struct inode *inode);
2899 int btrfs_drop_inode(struct inode *inode);
2900 int __init btrfs_init_cachep(void);
2901 void __cold btrfs_destroy_cachep(void);
2902 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2903 struct btrfs_root *root, struct btrfs_path *path);
2904 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2905 struct btrfs_root *root);
2906 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2907 struct page *page, size_t pg_offset,
2908 u64 start, u64 end);
2909 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2910 struct btrfs_root *root,
2911 struct inode *inode);
2912 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2913 struct btrfs_root *root, struct inode *inode);
2914 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2915 struct btrfs_inode *inode);
2916 int btrfs_orphan_cleanup(struct btrfs_root *root);
2917 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2918 void btrfs_add_delayed_iput(struct inode *inode);
2919 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2920 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2921 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2922 u64 start, u64 num_bytes, u64 min_size,
2923 loff_t actual_len, u64 *alloc_hint);
2924 int btrfs_prealloc_file_range_trans(struct inode *inode,
2925 struct btrfs_trans_handle *trans, int mode,
2926 u64 start, u64 num_bytes, u64 min_size,
2927 loff_t actual_len, u64 *alloc_hint);
2928 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2929 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2930 struct writeback_control *wbc);
2931 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2932 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2933 u64 end, int uptodate);
2934 extern const struct dentry_operations btrfs_dentry_operations;
2937 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2938 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2939 int btrfs_ioctl_get_supported_features(void __user *arg);
2940 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2941 int __pure btrfs_is_empty_uuid(u8 *uuid);
2942 int btrfs_defrag_file(struct inode *inode, struct file *file,
2943 struct btrfs_ioctl_defrag_range_args *range,
2944 u64 newer_than, unsigned long max_pages);
2945 void btrfs_get_block_group_info(struct list_head *groups_list,
2946 struct btrfs_ioctl_space_info *space);
2947 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2948 struct btrfs_ioctl_balance_args *bargs);
2951 int __init btrfs_auto_defrag_init(void);
2952 void __cold btrfs_auto_defrag_exit(void);
2953 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2954 struct btrfs_inode *inode);
2955 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2956 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2957 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2958 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2960 extern const struct file_operations btrfs_file_operations;
2961 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2962 struct btrfs_root *root, struct inode *inode,
2963 struct btrfs_path *path, u64 start, u64 end,
2964 u64 *drop_end, int drop_cache,
2966 u32 extent_item_size,
2968 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2969 struct btrfs_root *root, struct inode *inode, u64 start,
2970 u64 end, int drop_cache);
2971 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2972 const u64 start, const u64 end,
2973 struct btrfs_clone_extent_info *clone_info,
2974 struct btrfs_trans_handle **trans_out);
2975 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2976 struct btrfs_inode *inode, u64 start, u64 end);
2977 int btrfs_release_file(struct inode *inode, struct file *file);
2978 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2979 size_t num_pages, loff_t pos, size_t write_bytes,
2980 struct extent_state **cached);
2981 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2982 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
2983 struct file *file_out, loff_t pos_out,
2984 loff_t len, unsigned int remap_flags);
2987 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2988 struct btrfs_root *root);
2991 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
2992 unsigned long new_flags);
2993 int btrfs_sync_fs(struct super_block *sb, int wait);
2995 static inline __printf(2, 3) __cold
2996 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3000 #ifdef CONFIG_PRINTK
3003 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3005 #define btrfs_printk(fs_info, fmt, args...) \
3006 btrfs_no_printk(fs_info, fmt, ##args)
3009 #define btrfs_emerg(fs_info, fmt, args...) \
3010 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3011 #define btrfs_alert(fs_info, fmt, args...) \
3012 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3013 #define btrfs_crit(fs_info, fmt, args...) \
3014 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3015 #define btrfs_err(fs_info, fmt, args...) \
3016 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3017 #define btrfs_warn(fs_info, fmt, args...) \
3018 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3019 #define btrfs_notice(fs_info, fmt, args...) \
3020 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3021 #define btrfs_info(fs_info, fmt, args...) \
3022 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3025 * Wrappers that use printk_in_rcu
3027 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3028 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3029 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3030 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3031 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3032 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3033 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3034 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3035 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3036 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3037 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3038 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3039 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3040 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3043 * Wrappers that use a ratelimited printk_in_rcu
3045 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3046 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3047 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3048 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3049 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3050 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3051 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3052 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3053 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3054 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3055 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3056 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3057 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3058 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3061 * Wrappers that use a ratelimited printk
3063 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3064 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3065 #define btrfs_alert_rl(fs_info, fmt, args...) \
3066 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3067 #define btrfs_crit_rl(fs_info, fmt, args...) \
3068 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3069 #define btrfs_err_rl(fs_info, fmt, args...) \
3070 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3071 #define btrfs_warn_rl(fs_info, fmt, args...) \
3072 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3073 #define btrfs_notice_rl(fs_info, fmt, args...) \
3074 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3075 #define btrfs_info_rl(fs_info, fmt, args...) \
3076 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3078 #if defined(CONFIG_DYNAMIC_DEBUG)
3079 #define btrfs_debug(fs_info, fmt, args...) \
3080 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3081 fs_info, KERN_DEBUG fmt, ##args)
3082 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3083 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3084 fs_info, KERN_DEBUG fmt, ##args)
3085 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3086 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3087 fs_info, KERN_DEBUG fmt, ##args)
3088 #define btrfs_debug_rl(fs_info, fmt, args...) \
3089 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3090 fs_info, KERN_DEBUG fmt, ##args)
3091 #elif defined(DEBUG)
3092 #define btrfs_debug(fs_info, fmt, args...) \
3093 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3094 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3095 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3096 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3097 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3098 #define btrfs_debug_rl(fs_info, fmt, args...) \
3099 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3101 #define btrfs_debug(fs_info, fmt, args...) \
3102 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3103 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3104 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3105 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3106 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3107 #define btrfs_debug_rl(fs_info, fmt, args...) \
3108 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3111 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3114 btrfs_printk(fs_info, fmt, ##args); \
3115 rcu_read_unlock(); \
3118 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3121 btrfs_no_printk(fs_info, fmt, ##args); \
3122 rcu_read_unlock(); \
3125 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3127 static DEFINE_RATELIMIT_STATE(_rs, \
3128 DEFAULT_RATELIMIT_INTERVAL, \
3129 DEFAULT_RATELIMIT_BURST); \
3130 if (__ratelimit(&_rs)) \
3131 btrfs_printk(fs_info, fmt, ##args); \
3134 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3137 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3138 rcu_read_unlock(); \
3142 static inline void assfail(const char *expr, const char *file, int line)
3144 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3145 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3150 #define ASSERT(expr) \
3151 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3154 * Use that for functions that are conditionally exported for sanity tests but
3157 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3158 #define EXPORT_FOR_TESTS static
3160 #define EXPORT_FOR_TESTS
3164 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3167 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3172 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3173 unsigned int line, int errno, const char *fmt, ...);
3175 const char * __attribute_const__ btrfs_decode_error(int errno);
3178 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3179 const char *function,
3180 unsigned int line, int errno);
3183 * Call btrfs_abort_transaction as early as possible when an error condition is
3184 * detected, that way the exact line number is reported.
3186 #define btrfs_abort_transaction(trans, errno) \
3188 /* Report first abort since mount */ \
3189 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3190 &((trans)->fs_info->fs_state))) { \
3191 if ((errno) != -EIO) { \
3192 WARN(1, KERN_DEBUG \
3193 "BTRFS: Transaction aborted (error %d)\n", \
3196 btrfs_debug((trans)->fs_info, \
3197 "Transaction aborted (error %d)", \
3201 __btrfs_abort_transaction((trans), __func__, \
3202 __LINE__, (errno)); \
3205 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3207 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3208 (errno), fmt, ##args); \
3213 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3214 unsigned int line, int errno, const char *fmt, ...);
3216 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3217 * will panic(). Otherwise we BUG() here.
3219 #define btrfs_panic(fs_info, errno, fmt, args...) \
3221 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3226 /* compatibility and incompatibility defines */
3228 #define btrfs_set_fs_incompat(__fs_info, opt) \
3229 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3232 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3233 u64 flag, const char* name)
3235 struct btrfs_super_block *disk_super;
3238 disk_super = fs_info->super_copy;
3239 features = btrfs_super_incompat_flags(disk_super);
3240 if (!(features & flag)) {
3241 spin_lock(&fs_info->super_lock);
3242 features = btrfs_super_incompat_flags(disk_super);
3243 if (!(features & flag)) {
3245 btrfs_set_super_incompat_flags(disk_super, features);
3247 "setting incompat feature flag for %s (0x%llx)",
3250 spin_unlock(&fs_info->super_lock);
3254 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3255 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3258 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3259 u64 flag, const char* name)
3261 struct btrfs_super_block *disk_super;
3264 disk_super = fs_info->super_copy;
3265 features = btrfs_super_incompat_flags(disk_super);
3266 if (features & flag) {
3267 spin_lock(&fs_info->super_lock);
3268 features = btrfs_super_incompat_flags(disk_super);
3269 if (features & flag) {
3271 btrfs_set_super_incompat_flags(disk_super, features);
3273 "clearing incompat feature flag for %s (0x%llx)",
3276 spin_unlock(&fs_info->super_lock);
3280 #define btrfs_fs_incompat(fs_info, opt) \
3281 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3283 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3285 struct btrfs_super_block *disk_super;
3286 disk_super = fs_info->super_copy;
3287 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3290 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3291 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3294 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3295 u64 flag, const char *name)
3297 struct btrfs_super_block *disk_super;
3300 disk_super = fs_info->super_copy;
3301 features = btrfs_super_compat_ro_flags(disk_super);
3302 if (!(features & flag)) {
3303 spin_lock(&fs_info->super_lock);
3304 features = btrfs_super_compat_ro_flags(disk_super);
3305 if (!(features & flag)) {
3307 btrfs_set_super_compat_ro_flags(disk_super, features);
3309 "setting compat-ro feature flag for %s (0x%llx)",
3312 spin_unlock(&fs_info->super_lock);
3316 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3317 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3320 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3321 u64 flag, const char *name)
3323 struct btrfs_super_block *disk_super;
3326 disk_super = fs_info->super_copy;
3327 features = btrfs_super_compat_ro_flags(disk_super);
3328 if (features & flag) {
3329 spin_lock(&fs_info->super_lock);
3330 features = btrfs_super_compat_ro_flags(disk_super);
3331 if (features & flag) {
3333 btrfs_set_super_compat_ro_flags(disk_super, features);
3335 "clearing compat-ro feature flag for %s (0x%llx)",
3338 spin_unlock(&fs_info->super_lock);
3342 #define btrfs_fs_compat_ro(fs_info, opt) \
3343 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3345 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3347 struct btrfs_super_block *disk_super;
3348 disk_super = fs_info->super_copy;
3349 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3353 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3354 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3355 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3356 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3357 struct inode *inode, struct inode *dir);
3359 #define btrfs_get_acl NULL
3360 #define btrfs_set_acl NULL
3361 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3362 struct inode *inode, struct inode *dir)
3369 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3370 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3371 struct btrfs_root *root);
3372 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3373 struct btrfs_root *root);
3374 int btrfs_recover_relocation(struct btrfs_root *root);
3375 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3376 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3377 struct btrfs_root *root, struct extent_buffer *buf,
3378 struct extent_buffer *cow);
3379 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3380 u64 *bytes_to_reserve);
3381 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3382 struct btrfs_pending_snapshot *pending);
3385 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3386 u64 end, struct btrfs_scrub_progress *progress,
3387 int readonly, int is_dev_replace);
3388 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3389 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3390 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3391 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3392 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3393 struct btrfs_scrub_progress *progress);
3394 static inline void btrfs_init_full_stripe_locks_tree(
3395 struct btrfs_full_stripe_locks_tree *locks_root)
3397 locks_root->root = RB_ROOT;
3398 mutex_init(&locks_root->lock);
3402 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3403 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3404 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3406 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3408 btrfs_bio_counter_sub(fs_info, 1);
3412 struct reada_control {
3413 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3414 struct btrfs_key key_start;
3415 struct btrfs_key key_end; /* exclusive */
3418 wait_queue_head_t wait;
3420 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3421 struct btrfs_key *start, struct btrfs_key *end);
3422 int btrfs_reada_wait(void *handle);
3423 void btrfs_reada_detach(void *handle);
3424 int btree_readahead_hook(struct extent_buffer *eb, int err);
3426 static inline int is_fstree(u64 rootid)
3428 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3429 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3430 !btrfs_qgroup_level(rootid)))
3435 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3437 return signal_pending(current);
3440 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3442 /* Sanity test specific functions */
3443 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3444 void btrfs_test_inode_set_ops(struct inode *inode);
3445 void btrfs_test_destroy_inode(struct inode *inode);
3447 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3449 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3452 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)