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 <linux/iomap.h>
32 #include "extent-io-tree.h"
33 #include "extent_io.h"
34 #include "extent_map.h"
35 #include "async-thread.h"
36 #include "block-rsv.h"
39 struct btrfs_trans_handle;
40 struct btrfs_transaction;
41 struct btrfs_pending_snapshot;
42 struct btrfs_delayed_ref_root;
43 struct btrfs_space_info;
44 struct btrfs_block_group;
45 extern struct kmem_cache *btrfs_trans_handle_cachep;
46 extern struct kmem_cache *btrfs_bit_radix_cachep;
47 extern struct kmem_cache *btrfs_path_cachep;
48 extern struct kmem_cache *btrfs_free_space_cachep;
49 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
50 struct btrfs_ordered_sum;
53 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
56 * Maximum number of mirrors that can be available for all profiles counting
57 * the target device of dev-replace as one. During an active device replace
58 * procedure, the target device of the copy operation is a mirror for the
59 * filesystem data as well that can be used to read data in order to repair
60 * read errors on other disks.
62 * Current value is derived from RAID1C4 with 4 copies.
64 #define BTRFS_MAX_MIRRORS (4 + 1)
66 #define BTRFS_MAX_LEVEL 8
68 #define BTRFS_OLDEST_GENERATION 0ULL
71 * the max metadata block size. This limit is somewhat artificial,
72 * but the memmove costs go through the roof for larger blocks.
74 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
77 * we can actually store much bigger names, but lets not confuse the rest
80 #define BTRFS_NAME_LEN 255
83 * Theoretical limit is larger, but we keep this down to a sane
84 * value. That should limit greatly the possibility of collisions on
87 #define BTRFS_LINK_MAX 65535U
89 #define BTRFS_EMPTY_DIR_SIZE 0
91 /* ioprio of readahead is set to idle */
92 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
94 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
97 * Use large batch size to reduce overhead of metadata updates. On the reader
98 * side, we only read it when we are close to ENOSPC and the read overhead is
99 * mostly related to the number of CPUs, so it is OK to use arbitrary large
102 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
104 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
107 * Deltas are an effective way to populate global statistics. Give macro names
108 * to make it clear what we're doing. An example is discard_extents in
109 * btrfs_free_space_ctl.
111 #define BTRFS_STAT_NR_ENTRIES 2
112 #define BTRFS_STAT_CURR 0
113 #define BTRFS_STAT_PREV 1
116 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
118 static inline u32 count_max_extents(u64 size)
120 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
123 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
125 BUG_ON(num_stripes == 0);
126 return sizeof(struct btrfs_chunk) +
127 sizeof(struct btrfs_stripe) * (num_stripes - 1);
131 * Runtime (in-memory) states of filesystem
134 /* Global indicator of serious filesystem errors */
135 BTRFS_FS_STATE_ERROR,
137 * Filesystem is being remounted, allow to skip some operations, like
140 BTRFS_FS_STATE_REMOUNTING,
141 /* Track if a transaction abort has been reported on this filesystem */
142 BTRFS_FS_STATE_TRANS_ABORTED,
144 * Bio operations should be blocked on this filesystem because a source
145 * or target device is being destroyed as part of a device replace
147 BTRFS_FS_STATE_DEV_REPLACING,
148 /* The btrfs_fs_info created for self-tests */
149 BTRFS_FS_STATE_DUMMY_FS_INFO,
152 #define BTRFS_BACKREF_REV_MAX 256
153 #define BTRFS_BACKREF_REV_SHIFT 56
154 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
155 BTRFS_BACKREF_REV_SHIFT)
157 #define BTRFS_OLD_BACKREF_REV 0
158 #define BTRFS_MIXED_BACKREF_REV 1
161 * every tree block (leaf or node) starts with this header.
163 struct btrfs_header {
164 /* these first four must match the super block */
165 u8 csum[BTRFS_CSUM_SIZE];
166 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
167 __le64 bytenr; /* which block this node is supposed to live in */
170 /* allowed to be different from the super from here on down */
171 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
176 } __attribute__ ((__packed__));
179 * this is a very generous portion of the super block, giving us
180 * room to translate 14 chunks with 3 stripes each.
182 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
185 * just in case we somehow lose the roots and are not able to mount,
186 * we store an array of the roots from previous transactions
189 #define BTRFS_NUM_BACKUP_ROOTS 4
190 struct btrfs_root_backup {
192 __le64 tree_root_gen;
195 __le64 chunk_root_gen;
198 __le64 extent_root_gen;
207 __le64 csum_root_gen;
217 u8 extent_root_level;
221 /* future and to align */
223 } __attribute__ ((__packed__));
226 * the super block basically lists the main trees of the FS
227 * it currently lacks any block count etc etc
229 struct btrfs_super_block {
230 /* the first 4 fields must match struct btrfs_header */
231 u8 csum[BTRFS_CSUM_SIZE];
232 /* FS specific UUID, visible to user */
233 u8 fsid[BTRFS_FSID_SIZE];
234 __le64 bytenr; /* this block number */
237 /* allowed to be different from the btrfs_header from here own down */
244 /* this will help find the new super based on the log root */
245 __le64 log_root_transid;
248 __le64 root_dir_objectid;
252 __le32 __unused_leafsize;
254 __le32 sys_chunk_array_size;
255 __le64 chunk_root_generation;
257 __le64 compat_ro_flags;
258 __le64 incompat_flags;
263 struct btrfs_dev_item dev_item;
265 char label[BTRFS_LABEL_SIZE];
267 __le64 cache_generation;
268 __le64 uuid_tree_generation;
270 /* the UUID written into btree blocks */
271 u8 metadata_uuid[BTRFS_FSID_SIZE];
273 /* future expansion */
275 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
276 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
277 } __attribute__ ((__packed__));
280 * Compat flags that we support. If any incompat flags are set other than the
281 * ones specified below then we will fail to mount
283 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
284 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
285 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
287 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
288 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
289 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
292 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
294 #define BTRFS_FEATURE_INCOMPAT_SUPP \
295 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
296 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
297 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
298 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
299 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
300 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
301 BTRFS_FEATURE_INCOMPAT_RAID56 | \
302 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
303 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
304 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
305 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
306 BTRFS_FEATURE_INCOMPAT_RAID1C34)
308 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
309 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
310 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
313 * A leaf is full of items. offset and size tell us where to find
314 * the item in the leaf (relative to the start of the data area)
317 struct btrfs_disk_key key;
320 } __attribute__ ((__packed__));
323 * leaves have an item area and a data area:
324 * [item0, item1....itemN] [free space] [dataN...data1, data0]
326 * The data is separate from the items to get the keys closer together
330 struct btrfs_header header;
331 struct btrfs_item items[];
332 } __attribute__ ((__packed__));
335 * all non-leaf blocks are nodes, they hold only keys and pointers to
338 struct btrfs_key_ptr {
339 struct btrfs_disk_key key;
342 } __attribute__ ((__packed__));
345 struct btrfs_header header;
346 struct btrfs_key_ptr ptrs[];
347 } __attribute__ ((__packed__));
350 * btrfs_paths remember the path taken from the root down to the leaf.
351 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
352 * to any other levels that are present.
354 * The slots array records the index of the item or block pointer
355 * used while walking the tree.
357 enum { READA_NONE, READA_BACK, READA_FORWARD };
359 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
360 int slots[BTRFS_MAX_LEVEL];
361 /* if there is real range locking, this locks field will change */
362 u8 locks[BTRFS_MAX_LEVEL];
364 /* keep some upper locks as we walk down */
368 * set by btrfs_split_item, tells search_slot to keep all locks
369 * and to force calls to keep space in the nodes
371 unsigned int search_for_split:1;
372 unsigned int keep_locks:1;
373 unsigned int skip_locking:1;
374 unsigned int leave_spinning:1;
375 unsigned int search_commit_root:1;
376 unsigned int need_commit_sem:1;
377 unsigned int skip_release_on_error:1;
379 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
380 sizeof(struct btrfs_item))
381 struct btrfs_dev_replace {
382 u64 replace_state; /* see #define above */
383 time64_t time_started; /* seconds since 1-Jan-1970 */
384 time64_t time_stopped; /* seconds since 1-Jan-1970 */
385 atomic64_t num_write_errors;
386 atomic64_t num_uncorrectable_read_errors;
389 u64 committed_cursor_left;
390 u64 cursor_left_last_write_of_item;
393 u64 cont_reading_from_srcdev_mode; /* see #define above */
396 int item_needs_writeback;
397 struct btrfs_device *srcdev;
398 struct btrfs_device *tgtdev;
400 struct mutex lock_finishing_cancel_unmount;
401 struct rw_semaphore rwsem;
403 struct btrfs_scrub_progress scrub_progress;
405 struct percpu_counter bio_counter;
406 wait_queue_head_t replace_wait;
410 * free clusters are used to claim free space in relatively large chunks,
411 * allowing us to do less seeky writes. They are used for all metadata
412 * allocations. In ssd_spread mode they are also used for data allocations.
414 struct btrfs_free_cluster {
416 spinlock_t refill_lock;
419 /* largest extent in this cluster */
422 /* first extent starting offset */
425 /* We did a full search and couldn't create a cluster */
428 struct btrfs_block_group *block_group;
430 * when a cluster is allocated from a block group, we put the
431 * cluster onto a list in the block group so that it can
432 * be freed before the block group is freed.
434 struct list_head block_group_list;
437 enum btrfs_caching_type {
441 BTRFS_CACHE_FINISHED,
446 * Tree to record all locked full stripes of a RAID5/6 block group
448 struct btrfs_full_stripe_locks_tree {
453 /* Discard control. */
455 * Async discard uses multiple lists to differentiate the discard filter
456 * parameters. Index 0 is for completely free block groups where we need to
457 * ensure the entire block group is trimmed without being lossy. Indices
458 * afterwards represent monotonically decreasing discard filter sizes to
459 * prioritize what should be discarded next.
461 #define BTRFS_NR_DISCARD_LISTS 3
462 #define BTRFS_DISCARD_INDEX_UNUSED 0
463 #define BTRFS_DISCARD_INDEX_START 1
465 struct btrfs_discard_ctl {
466 struct workqueue_struct *discard_workers;
467 struct delayed_work work;
469 struct btrfs_block_group *block_group;
470 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
472 atomic_t discardable_extents;
473 atomic64_t discardable_bytes;
474 u64 max_discard_size;
478 u64 discard_extent_bytes;
479 u64 discard_bitmap_bytes;
480 atomic64_t discard_bytes_saved;
483 /* delayed seq elem */
485 struct list_head list;
489 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
491 #define SEQ_LAST ((u64)-1)
493 enum btrfs_orphan_cleanup_state {
494 ORPHAN_CLEANUP_STARTED = 1,
495 ORPHAN_CLEANUP_DONE = 2,
498 void btrfs_init_async_reclaim_work(struct work_struct *work);
501 struct reloc_control;
503 struct btrfs_fs_devices;
504 struct btrfs_balance_control;
505 struct btrfs_delayed_root;
508 * Block group or device which contains an active swapfile. Used for preventing
509 * unsafe operations while a swapfile is active.
511 * These are sorted on (ptr, inode) (note that a block group or device can
512 * contain more than one swapfile). We compare the pointer values because we
513 * don't actually care what the object is, we just need a quick check whether
514 * the object exists in the rbtree.
516 struct btrfs_swapfile_pin {
521 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
522 * points to a struct btrfs_device.
527 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
531 BTRFS_FS_CLOSING_START,
532 BTRFS_FS_CLOSING_DONE,
533 BTRFS_FS_LOG_RECOVERING,
535 BTRFS_FS_QUOTA_ENABLED,
536 BTRFS_FS_UPDATE_UUID_TREE_GEN,
537 BTRFS_FS_CREATING_FREE_SPACE_TREE,
541 BTRFS_FS_QUOTA_OVERRIDE,
542 /* Used to record internally whether fs has been frozen */
545 * Indicate that a whole-filesystem exclusive operation is running
546 * (device replace, resize, device add/delete, balance)
550 * To info transaction_kthread we need an immediate commit so it
551 * doesn't need to wait for commit_interval
553 BTRFS_FS_NEED_ASYNC_COMMIT,
555 * Indicate that balance has been set up from the ioctl and is in the
556 * main phase. The fs_info::balance_ctl is initialized.
557 * Set and cleared while holding fs_info::balance_mutex.
559 BTRFS_FS_BALANCE_RUNNING,
561 /* Indicate that the cleaner thread is awake and doing something. */
562 BTRFS_FS_CLEANER_RUNNING,
565 * The checksumming has an optimized version and is considered fast,
566 * so we don't need to offload checksums to workqueues.
568 BTRFS_FS_CSUM_IMPL_FAST,
570 /* Indicate that the discard workqueue can service discards. */
571 BTRFS_FS_DISCARD_RUNNING,
574 struct btrfs_fs_info {
575 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
577 struct btrfs_root *extent_root;
578 struct btrfs_root *tree_root;
579 struct btrfs_root *chunk_root;
580 struct btrfs_root *dev_root;
581 struct btrfs_root *fs_root;
582 struct btrfs_root *csum_root;
583 struct btrfs_root *quota_root;
584 struct btrfs_root *uuid_root;
585 struct btrfs_root *free_space_root;
586 struct btrfs_root *data_reloc_root;
588 /* the log root tree is a directory of all the other log roots */
589 struct btrfs_root *log_root_tree;
591 spinlock_t fs_roots_radix_lock;
592 struct radix_tree_root fs_roots_radix;
594 /* block group cache stuff */
595 spinlock_t block_group_cache_lock;
596 u64 first_logical_byte;
597 struct rb_root block_group_cache_tree;
599 /* keep track of unallocated space */
600 atomic64_t free_chunk_space;
602 /* Track ranges which are used by log trees blocks/logged data extents */
603 struct extent_io_tree excluded_extents;
605 /* logical->physical extent mapping */
606 struct extent_map_tree mapping_tree;
609 * block reservation for extent, checksum, root tree and
610 * delayed dir index item
612 struct btrfs_block_rsv global_block_rsv;
613 /* block reservation for metadata operations */
614 struct btrfs_block_rsv trans_block_rsv;
615 /* block reservation for chunk tree */
616 struct btrfs_block_rsv chunk_block_rsv;
617 /* block reservation for delayed operations */
618 struct btrfs_block_rsv delayed_block_rsv;
619 /* block reservation for delayed refs */
620 struct btrfs_block_rsv delayed_refs_rsv;
622 struct btrfs_block_rsv empty_block_rsv;
625 u64 last_trans_committed;
626 u64 avg_delayed_ref_runtime;
629 * this is updated to the current trans every time a full commit
630 * is required instead of the faster short fsync log commits
632 u64 last_trans_log_full_commit;
633 unsigned long mount_opt;
635 * Track requests for actions that need to be done during transaction
636 * commit (like for some mount options).
638 unsigned long pending_changes;
639 unsigned long compress_type:4;
640 unsigned int compress_level;
643 * It is a suggestive number, the read side is safe even it gets a
644 * wrong number because we will write out the data into a regular
645 * extent. The write side(mount/remount) is under ->s_umount lock,
646 * so it is also safe.
650 struct btrfs_transaction *running_transaction;
651 wait_queue_head_t transaction_throttle;
652 wait_queue_head_t transaction_wait;
653 wait_queue_head_t transaction_blocked_wait;
654 wait_queue_head_t async_submit_wait;
657 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
658 * when they are updated.
660 * Because we do not clear the flags for ever, so we needn't use
661 * the lock on the read side.
663 * We also needn't use the lock when we mount the fs, because
664 * there is no other task which will update the flag.
666 spinlock_t super_lock;
667 struct btrfs_super_block *super_copy;
668 struct btrfs_super_block *super_for_commit;
669 struct super_block *sb;
670 struct inode *btree_inode;
671 struct mutex tree_log_mutex;
672 struct mutex transaction_kthread_mutex;
673 struct mutex cleaner_mutex;
674 struct mutex chunk_mutex;
677 * this is taken to make sure we don't set block groups ro after
678 * the free space cache has been allocated on them
680 struct mutex ro_block_group_mutex;
682 /* this is used during read/modify/write to make sure
683 * no two ios are trying to mod the same stripe at the same
686 struct btrfs_stripe_hash_table *stripe_hash_table;
689 * this protects the ordered operations list only while we are
690 * processing all of the entries on it. This way we make
691 * sure the commit code doesn't find the list temporarily empty
692 * because another function happens to be doing non-waiting preflush
693 * before jumping into the main commit.
695 struct mutex ordered_operations_mutex;
697 struct rw_semaphore commit_root_sem;
699 struct rw_semaphore cleanup_work_sem;
701 struct rw_semaphore subvol_sem;
703 spinlock_t trans_lock;
705 * the reloc mutex goes with the trans lock, it is taken
706 * during commit to protect us from the relocation code
708 struct mutex reloc_mutex;
710 struct list_head trans_list;
711 struct list_head dead_roots;
712 struct list_head caching_block_groups;
714 spinlock_t delayed_iput_lock;
715 struct list_head delayed_iputs;
716 atomic_t nr_delayed_iputs;
717 wait_queue_head_t delayed_iputs_wait;
719 atomic64_t tree_mod_seq;
721 /* this protects tree_mod_log and tree_mod_seq_list */
722 rwlock_t tree_mod_log_lock;
723 struct rb_root tree_mod_log;
724 struct list_head tree_mod_seq_list;
726 atomic_t async_delalloc_pages;
729 * this is used to protect the following list -- ordered_roots.
731 spinlock_t ordered_root_lock;
734 * all fs/file tree roots in which there are data=ordered extents
735 * pending writeback are added into this list.
737 * these can span multiple transactions and basically include
738 * every dirty data page that isn't from nodatacow
740 struct list_head ordered_roots;
742 struct mutex delalloc_root_mutex;
743 spinlock_t delalloc_root_lock;
744 /* all fs/file tree roots that have delalloc inodes. */
745 struct list_head delalloc_roots;
748 * there is a pool of worker threads for checksumming during writes
749 * and a pool for checksumming after reads. This is because readers
750 * can run with FS locks held, and the writers may be waiting for
751 * those locks. We don't want ordering in the pending list to cause
752 * deadlocks, and so the two are serviced separately.
754 * A third pool does submit_bio to avoid deadlocking with the other
757 struct btrfs_workqueue *workers;
758 struct btrfs_workqueue *delalloc_workers;
759 struct btrfs_workqueue *flush_workers;
760 struct btrfs_workqueue *endio_workers;
761 struct btrfs_workqueue *endio_meta_workers;
762 struct btrfs_workqueue *endio_raid56_workers;
763 struct btrfs_workqueue *rmw_workers;
764 struct btrfs_workqueue *endio_meta_write_workers;
765 struct btrfs_workqueue *endio_write_workers;
766 struct btrfs_workqueue *endio_freespace_worker;
767 struct btrfs_workqueue *caching_workers;
768 struct btrfs_workqueue *readahead_workers;
771 * fixup workers take dirty pages that didn't properly go through
772 * the cow mechanism and make them safe to write. It happens
773 * for the sys_munmap function call path
775 struct btrfs_workqueue *fixup_workers;
776 struct btrfs_workqueue *delayed_workers;
778 struct task_struct *transaction_kthread;
779 struct task_struct *cleaner_kthread;
780 u32 thread_pool_size;
782 struct kobject *space_info_kobj;
786 /* used to keep from writing metadata until there is a nice batch */
787 struct percpu_counter dirty_metadata_bytes;
788 struct percpu_counter delalloc_bytes;
789 struct percpu_counter dio_bytes;
790 s32 dirty_metadata_batch;
793 struct list_head dirty_cowonly_roots;
795 struct btrfs_fs_devices *fs_devices;
798 * The space_info list is effectively read only after initial
799 * setup. It is populated at mount time and cleaned up after
800 * all block groups are removed. RCU is used to protect it.
802 struct list_head space_info;
804 struct btrfs_space_info *data_sinfo;
806 struct reloc_control *reloc_ctl;
808 /* data_alloc_cluster is only used in ssd_spread mode */
809 struct btrfs_free_cluster data_alloc_cluster;
811 /* all metadata allocations go through this cluster */
812 struct btrfs_free_cluster meta_alloc_cluster;
814 /* auto defrag inodes go here */
815 spinlock_t defrag_inodes_lock;
816 struct rb_root defrag_inodes;
817 atomic_t defrag_running;
819 /* Used to protect avail_{data, metadata, system}_alloc_bits */
820 seqlock_t profiles_lock;
822 * these three are in extended format (availability of single
823 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
824 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
826 u64 avail_data_alloc_bits;
827 u64 avail_metadata_alloc_bits;
828 u64 avail_system_alloc_bits;
830 /* restriper state */
831 spinlock_t balance_lock;
832 struct mutex balance_mutex;
833 atomic_t balance_pause_req;
834 atomic_t balance_cancel_req;
835 struct btrfs_balance_control *balance_ctl;
836 wait_queue_head_t balance_wait_q;
838 u32 data_chunk_allocations;
843 /* private scrub information */
844 struct mutex scrub_lock;
845 atomic_t scrubs_running;
846 atomic_t scrub_pause_req;
847 atomic_t scrubs_paused;
848 atomic_t scrub_cancel_req;
849 wait_queue_head_t scrub_pause_wait;
851 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
854 refcount_t scrub_workers_refcnt;
855 struct btrfs_workqueue *scrub_workers;
856 struct btrfs_workqueue *scrub_wr_completion_workers;
857 struct btrfs_workqueue *scrub_parity_workers;
859 struct btrfs_discard_ctl discard_ctl;
861 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
862 u32 check_integrity_print_mask;
864 /* is qgroup tracking in a consistent state? */
867 /* holds configuration and tracking. Protected by qgroup_lock */
868 struct rb_root qgroup_tree;
869 spinlock_t qgroup_lock;
872 * used to avoid frequently calling ulist_alloc()/ulist_free()
873 * when doing qgroup accounting, it must be protected by qgroup_lock.
875 struct ulist *qgroup_ulist;
877 /* protect user change for quota operations */
878 struct mutex qgroup_ioctl_lock;
880 /* list of dirty qgroups to be written at next commit */
881 struct list_head dirty_qgroups;
883 /* used by qgroup for an efficient tree traversal */
886 /* qgroup rescan items */
887 struct mutex qgroup_rescan_lock; /* protects the progress item */
888 struct btrfs_key qgroup_rescan_progress;
889 struct btrfs_workqueue *qgroup_rescan_workers;
890 struct completion qgroup_rescan_completion;
891 struct btrfs_work qgroup_rescan_work;
892 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
894 /* filesystem state */
895 unsigned long fs_state;
897 struct btrfs_delayed_root *delayed_root;
900 spinlock_t reada_lock;
901 struct radix_tree_root reada_tree;
903 /* readahead works cnt */
904 atomic_t reada_works_cnt;
906 /* Extent buffer radix tree */
907 spinlock_t buffer_lock;
908 struct radix_tree_root buffer_radix;
910 /* next backup root to be overwritten */
911 int backup_root_index;
913 /* device replace state */
914 struct btrfs_dev_replace dev_replace;
916 struct semaphore uuid_tree_rescan_sem;
918 /* Used to reclaim the metadata space in the background. */
919 struct work_struct async_reclaim_work;
921 spinlock_t unused_bgs_lock;
922 struct list_head unused_bgs;
923 struct mutex unused_bg_unpin_mutex;
924 struct mutex delete_unused_bgs_mutex;
926 /* Cached block sizes */
931 /* Block groups and devices containing active swapfiles. */
932 spinlock_t swapfile_pins_lock;
933 struct rb_root swapfile_pins;
935 struct crypto_shash *csum_shash;
938 * Number of send operations in progress.
939 * Updated while holding fs_info::balance_mutex.
941 int send_in_progress;
943 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
944 spinlock_t ref_verify_lock;
945 struct rb_root block_tree;
948 #ifdef CONFIG_BTRFS_DEBUG
949 struct kobject *debug_kobj;
950 struct kobject *discard_debug_kobj;
951 struct list_head allocated_roots;
953 spinlock_t eb_leak_lock;
954 struct list_head allocated_ebs;
958 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
960 return sb->s_fs_info;
964 * The state of btrfs root
968 * btrfs_record_root_in_trans is a multi-step process, and it can race
969 * with the balancing code. But the race is very small, and only the
970 * first time the root is added to each transaction. So IN_TRANS_SETUP
971 * is used to tell us when more checks are required
973 BTRFS_ROOT_IN_TRANS_SETUP,
976 * Set if tree blocks of this root can be shared by other roots.
977 * Only subvolume trees and their reloc trees have this bit set.
978 * Conflicts with TRACK_DIRTY bit.
980 * This affects two things:
982 * - How balance works
983 * For shareable roots, we need to use reloc tree and do path
984 * replacement for balance, and need various pre/post hooks for
985 * snapshot creation to handle them.
987 * While for non-shareable trees, we just simply do a tree search
990 * - How dirty roots are tracked
991 * For shareable roots, btrfs_record_root_in_trans() is needed to
992 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
993 * don't need to set this manually.
995 BTRFS_ROOT_SHAREABLE,
996 BTRFS_ROOT_TRACK_DIRTY,
998 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
999 BTRFS_ROOT_DEFRAG_RUNNING,
1000 BTRFS_ROOT_FORCE_COW,
1001 BTRFS_ROOT_MULTI_LOG_TASKS,
1003 BTRFS_ROOT_DELETING,
1006 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1008 * Set for the subvolume tree owning the reloc tree.
1010 BTRFS_ROOT_DEAD_RELOC_TREE,
1011 /* Mark dead root stored on device whose cleanup needs to be resumed */
1012 BTRFS_ROOT_DEAD_TREE,
1016 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1017 * code. For detail check comment in fs/btrfs/qgroup.c.
1019 struct btrfs_qgroup_swapped_blocks {
1021 /* RM_EMPTY_ROOT() of above blocks[] */
1023 struct rb_root blocks[BTRFS_MAX_LEVEL];
1027 * in ram representation of the tree. extent_root is used for all allocations
1028 * and for the extent tree extent_root root.
1031 struct extent_buffer *node;
1033 struct extent_buffer *commit_root;
1034 struct btrfs_root *log_root;
1035 struct btrfs_root *reloc_root;
1037 unsigned long state;
1038 struct btrfs_root_item root_item;
1039 struct btrfs_key root_key;
1040 struct btrfs_fs_info *fs_info;
1041 struct extent_io_tree dirty_log_pages;
1043 struct mutex objectid_mutex;
1045 spinlock_t accounting_lock;
1046 struct btrfs_block_rsv *block_rsv;
1048 /* free ino cache stuff */
1049 struct btrfs_free_space_ctl *free_ino_ctl;
1050 enum btrfs_caching_type ino_cache_state;
1051 spinlock_t ino_cache_lock;
1052 wait_queue_head_t ino_cache_wait;
1053 struct btrfs_free_space_ctl *free_ino_pinned;
1054 u64 ino_cache_progress;
1055 struct inode *ino_cache_inode;
1057 struct mutex log_mutex;
1058 wait_queue_head_t log_writer_wait;
1059 wait_queue_head_t log_commit_wait[2];
1060 struct list_head log_ctxs[2];
1061 atomic_t log_writers;
1062 atomic_t log_commit[2];
1065 /* No matter the commit succeeds or not*/
1066 int log_transid_committed;
1067 /* Just be updated when the commit succeeds. */
1068 int last_log_commit;
1069 pid_t log_start_pid;
1075 u64 highest_objectid;
1077 u64 defrag_trans_start;
1078 struct btrfs_key defrag_progress;
1079 struct btrfs_key defrag_max;
1081 /* The dirty list is only used by non-shareable roots */
1082 struct list_head dirty_list;
1084 struct list_head root_list;
1086 spinlock_t log_extents_lock[2];
1087 struct list_head logged_list[2];
1089 int orphan_cleanup_state;
1091 spinlock_t inode_lock;
1092 /* red-black tree that keeps track of in-memory inodes */
1093 struct rb_root inode_tree;
1096 * radix tree that keeps track of delayed nodes of every inode,
1097 * protected by inode_lock
1099 struct radix_tree_root delayed_nodes_tree;
1101 * right now this just gets used so that a root has its own devid
1102 * for stat. It may be used for more later
1106 spinlock_t root_item_lock;
1109 struct mutex delalloc_mutex;
1110 spinlock_t delalloc_lock;
1112 * all of the inodes that have delalloc bytes. It is possible for
1113 * this list to be empty even when there is still dirty data=ordered
1114 * extents waiting to finish IO.
1116 struct list_head delalloc_inodes;
1117 struct list_head delalloc_root;
1118 u64 nr_delalloc_inodes;
1120 struct mutex ordered_extent_mutex;
1122 * this is used by the balancing code to wait for all the pending
1125 spinlock_t ordered_extent_lock;
1128 * all of the data=ordered extents pending writeback
1129 * these can span multiple transactions and basically include
1130 * every dirty data page that isn't from nodatacow
1132 struct list_head ordered_extents;
1133 struct list_head ordered_root;
1134 u64 nr_ordered_extents;
1137 * Not empty if this subvolume root has gone through tree block swap
1140 * Will be used by reloc_control::dirty_subvol_roots.
1142 struct list_head reloc_dirty_list;
1145 * Number of currently running SEND ioctls to prevent
1146 * manipulation with the read-only status via SUBVOL_SETFLAGS
1148 int send_in_progress;
1150 * Number of currently running deduplication operations that have a
1151 * destination inode belonging to this root. Protected by the lock
1154 int dedupe_in_progress;
1155 /* For exclusion of snapshot creation and nocow writes */
1156 struct btrfs_drew_lock snapshot_lock;
1158 atomic_t snapshot_force_cow;
1160 /* For qgroup metadata reserved space */
1161 spinlock_t qgroup_meta_rsv_lock;
1162 u64 qgroup_meta_rsv_pertrans;
1163 u64 qgroup_meta_rsv_prealloc;
1165 /* Number of active swapfiles */
1166 atomic_t nr_swapfiles;
1168 /* Record pairs of swapped blocks for qgroup */
1169 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1171 /* Used only by log trees, when logging csum items */
1172 struct extent_io_tree log_csum_range;
1174 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1178 #ifdef CONFIG_BTRFS_DEBUG
1179 struct list_head leak_list;
1183 struct btrfs_clone_extent_info {
1193 struct btrfs_file_private {
1197 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1199 return btrfs_sb(inode->i_sb)->sectorsize;
1202 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1205 return info->nodesize - sizeof(struct btrfs_header);
1208 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1210 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1212 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1215 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1217 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1220 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1221 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1222 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1224 return BTRFS_MAX_ITEM_SIZE(info) -
1225 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1228 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1230 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1234 * Flags for mount options.
1236 * Note: don't forget to add new options to btrfs_show_options()
1238 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1239 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1240 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1241 #define BTRFS_MOUNT_SSD (1 << 3)
1242 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1243 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1244 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1245 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1246 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1247 #define BTRFS_MOUNT_NOSSD (1 << 9)
1248 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1249 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1250 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1251 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1252 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1253 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1254 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1255 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1256 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1257 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1258 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1259 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1260 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1261 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1262 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1263 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1264 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1265 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1266 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1267 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1269 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1270 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1272 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1273 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1274 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1275 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1278 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1280 if (!btrfs_test_opt(fs_info, opt)) \
1281 btrfs_info(fs_info, fmt, ##args); \
1282 btrfs_set_opt(fs_info->mount_opt, opt); \
1285 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1287 if (btrfs_test_opt(fs_info, opt)) \
1288 btrfs_info(fs_info, fmt, ##args); \
1289 btrfs_clear_opt(fs_info->mount_opt, opt); \
1293 * Requests for changes that need to be done during transaction commit.
1295 * Internal mount options that are used for special handling of the real
1296 * mount options (eg. cannot be set during remount and have to be set during
1297 * transaction commit)
1300 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1301 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1302 #define BTRFS_PENDING_COMMIT (2)
1304 #define btrfs_test_pending(info, opt) \
1305 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1306 #define btrfs_set_pending(info, opt) \
1307 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1308 #define btrfs_clear_pending(info, opt) \
1309 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1312 * Helpers for setting pending mount option changes.
1314 * Expects corresponding macros
1315 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1317 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1319 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1320 btrfs_info((info), fmt, ##args); \
1321 btrfs_set_pending((info), SET_##opt); \
1322 btrfs_clear_pending((info), CLEAR_##opt); \
1326 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1328 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1329 btrfs_info((info), fmt, ##args); \
1330 btrfs_set_pending((info), CLEAR_##opt); \
1331 btrfs_clear_pending((info), SET_##opt); \
1338 #define BTRFS_INODE_NODATASUM (1 << 0)
1339 #define BTRFS_INODE_NODATACOW (1 << 1)
1340 #define BTRFS_INODE_READONLY (1 << 2)
1341 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1342 #define BTRFS_INODE_PREALLOC (1 << 4)
1343 #define BTRFS_INODE_SYNC (1 << 5)
1344 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1345 #define BTRFS_INODE_APPEND (1 << 7)
1346 #define BTRFS_INODE_NODUMP (1 << 8)
1347 #define BTRFS_INODE_NOATIME (1 << 9)
1348 #define BTRFS_INODE_DIRSYNC (1 << 10)
1349 #define BTRFS_INODE_COMPRESS (1 << 11)
1351 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1353 #define BTRFS_INODE_FLAG_MASK \
1354 (BTRFS_INODE_NODATASUM | \
1355 BTRFS_INODE_NODATACOW | \
1356 BTRFS_INODE_READONLY | \
1357 BTRFS_INODE_NOCOMPRESS | \
1358 BTRFS_INODE_PREALLOC | \
1359 BTRFS_INODE_SYNC | \
1360 BTRFS_INODE_IMMUTABLE | \
1361 BTRFS_INODE_APPEND | \
1362 BTRFS_INODE_NODUMP | \
1363 BTRFS_INODE_NOATIME | \
1364 BTRFS_INODE_DIRSYNC | \
1365 BTRFS_INODE_COMPRESS | \
1366 BTRFS_INODE_ROOT_ITEM_INIT)
1368 struct btrfs_map_token {
1369 struct extent_buffer *eb;
1371 unsigned long offset;
1374 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1375 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1377 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1378 struct extent_buffer *eb)
1381 token->kaddr = page_address(eb->pages[0]);
1385 /* some macros to generate set/get functions for the struct fields. This
1386 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1389 #define le8_to_cpu(v) (v)
1390 #define cpu_to_le8(v) (v)
1393 #define read_eb_member(eb, ptr, type, member, result) (\
1394 read_extent_buffer(eb, (char *)(result), \
1395 ((unsigned long)(ptr)) + \
1396 offsetof(type, member), \
1397 sizeof(((type *)0)->member)))
1399 #define write_eb_member(eb, ptr, type, member, result) (\
1400 write_extent_buffer(eb, (char *)(result), \
1401 ((unsigned long)(ptr)) + \
1402 offsetof(type, member), \
1403 sizeof(((type *)0)->member)))
1405 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1406 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1407 const void *ptr, unsigned long off); \
1408 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1409 const void *ptr, unsigned long off, \
1411 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1412 const void *ptr, unsigned long off); \
1413 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1414 unsigned long off, u##bits val);
1416 DECLARE_BTRFS_SETGET_BITS(8)
1417 DECLARE_BTRFS_SETGET_BITS(16)
1418 DECLARE_BTRFS_SETGET_BITS(32)
1419 DECLARE_BTRFS_SETGET_BITS(64)
1421 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1422 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1425 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1426 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1428 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1431 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1432 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1434 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1437 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1438 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1440 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1441 type *s, u##bits val) \
1443 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1444 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1447 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1448 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1450 const type *p = page_address(eb->pages[0]); \
1451 u##bits res = le##bits##_to_cpu(p->member); \
1454 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1457 type *p = page_address(eb->pages[0]); \
1458 p->member = cpu_to_le##bits(val); \
1461 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1462 static inline u##bits btrfs_##name(const type *s) \
1464 return le##bits##_to_cpu(s->member); \
1466 static inline void btrfs_set_##name(type *s, u##bits val) \
1468 s->member = cpu_to_le##bits(val); \
1472 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1473 struct btrfs_dev_item *s)
1475 BUILD_BUG_ON(sizeof(u64) !=
1476 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1477 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1480 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1481 struct btrfs_dev_item *s,
1484 BUILD_BUG_ON(sizeof(u64) !=
1485 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1486 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1487 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1491 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1492 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1493 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1494 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1495 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1497 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1498 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1499 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1500 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1501 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1502 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1504 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1505 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1507 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1509 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1511 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1513 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1515 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1516 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1518 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1520 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1522 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1525 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1527 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1530 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1532 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1535 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1536 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1537 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1538 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1539 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1540 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1541 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1542 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1543 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1544 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1545 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1547 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1549 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1552 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1553 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1554 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1556 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1558 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1560 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1562 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1563 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1565 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1567 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1568 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1570 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1573 unsigned long offset = (unsigned long)c;
1574 offset += offsetof(struct btrfs_chunk, stripe);
1575 offset += nr * sizeof(struct btrfs_stripe);
1576 return (struct btrfs_stripe *)offset;
1579 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1581 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1584 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1585 struct btrfs_chunk *c, int nr)
1587 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1590 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1591 struct btrfs_chunk *c, int nr)
1593 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1596 /* struct btrfs_block_group_item */
1597 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1599 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1601 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1602 struct btrfs_block_group_item, chunk_objectid, 64);
1604 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1605 struct btrfs_block_group_item, chunk_objectid, 64);
1606 BTRFS_SETGET_FUNCS(block_group_flags,
1607 struct btrfs_block_group_item, flags, 64);
1608 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1609 struct btrfs_block_group_item, flags, 64);
1611 /* struct btrfs_free_space_info */
1612 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1614 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1616 /* struct btrfs_inode_ref */
1617 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1618 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1620 /* struct btrfs_inode_extref */
1621 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1622 parent_objectid, 64);
1623 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1625 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1627 /* struct btrfs_inode_item */
1628 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1629 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1630 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1631 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1632 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1633 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1634 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1635 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1636 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1637 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1638 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1639 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1640 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1642 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1644 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1646 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1647 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1649 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1651 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1652 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1653 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1654 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1655 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1656 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1657 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1658 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1659 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1660 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1662 /* struct btrfs_dev_extent */
1663 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1665 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1666 chunk_objectid, 64);
1667 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1669 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1670 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1671 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1673 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1675 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1677 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1678 struct btrfs_tree_block_info *item,
1679 struct btrfs_disk_key *key)
1681 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1684 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1685 struct btrfs_tree_block_info *item,
1686 struct btrfs_disk_key *key)
1688 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1691 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1693 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1695 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1697 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1700 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1703 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1705 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1708 static inline u32 btrfs_extent_inline_ref_size(int type)
1710 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1711 type == BTRFS_SHARED_BLOCK_REF_KEY)
1712 return sizeof(struct btrfs_extent_inline_ref);
1713 if (type == BTRFS_SHARED_DATA_REF_KEY)
1714 return sizeof(struct btrfs_shared_data_ref) +
1715 sizeof(struct btrfs_extent_inline_ref);
1716 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1717 return sizeof(struct btrfs_extent_data_ref) +
1718 offsetof(struct btrfs_extent_inline_ref, offset);
1722 /* struct btrfs_node */
1723 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1724 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1725 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1727 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1730 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1733 ptr = offsetof(struct btrfs_node, ptrs) +
1734 sizeof(struct btrfs_key_ptr) * nr;
1735 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1738 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1742 ptr = offsetof(struct btrfs_node, ptrs) +
1743 sizeof(struct btrfs_key_ptr) * nr;
1744 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1747 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1750 ptr = offsetof(struct btrfs_node, ptrs) +
1751 sizeof(struct btrfs_key_ptr) * nr;
1752 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1755 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1759 ptr = offsetof(struct btrfs_node, ptrs) +
1760 sizeof(struct btrfs_key_ptr) * nr;
1761 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1764 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1766 return offsetof(struct btrfs_node, ptrs) +
1767 sizeof(struct btrfs_key_ptr) * nr;
1770 void btrfs_node_key(const struct extent_buffer *eb,
1771 struct btrfs_disk_key *disk_key, int nr);
1773 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1774 struct btrfs_disk_key *disk_key, int nr)
1777 ptr = btrfs_node_key_ptr_offset(nr);
1778 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1779 struct btrfs_key_ptr, key, disk_key);
1782 /* struct btrfs_item */
1783 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1784 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1785 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1786 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1788 static inline unsigned long btrfs_item_nr_offset(int nr)
1790 return offsetof(struct btrfs_leaf, items) +
1791 sizeof(struct btrfs_item) * nr;
1794 static inline struct btrfs_item *btrfs_item_nr(int nr)
1796 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1799 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1800 struct btrfs_item *item)
1802 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1805 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1807 return btrfs_item_end(eb, btrfs_item_nr(nr));
1810 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1812 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1815 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1817 return btrfs_item_size(eb, btrfs_item_nr(nr));
1820 static inline void btrfs_item_key(const struct extent_buffer *eb,
1821 struct btrfs_disk_key *disk_key, int nr)
1823 struct btrfs_item *item = btrfs_item_nr(nr);
1824 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1827 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1828 struct btrfs_disk_key *disk_key, int nr)
1830 struct btrfs_item *item = btrfs_item_nr(nr);
1831 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1834 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1837 * struct btrfs_root_ref
1839 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1840 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1841 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1843 /* struct btrfs_dir_item */
1844 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1845 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1846 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1847 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1848 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1849 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1851 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1853 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1856 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1857 const struct btrfs_dir_item *item,
1858 struct btrfs_disk_key *key)
1860 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1863 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1864 struct btrfs_dir_item *item,
1865 const struct btrfs_disk_key *key)
1867 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1870 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1872 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1874 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1877 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1878 const struct btrfs_free_space_header *h,
1879 struct btrfs_disk_key *key)
1881 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1884 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1885 struct btrfs_free_space_header *h,
1886 const struct btrfs_disk_key *key)
1888 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1891 /* struct btrfs_disk_key */
1892 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1894 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1895 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1897 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1898 const struct btrfs_disk_key *disk)
1900 cpu->offset = le64_to_cpu(disk->offset);
1901 cpu->type = disk->type;
1902 cpu->objectid = le64_to_cpu(disk->objectid);
1905 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1906 const struct btrfs_key *cpu)
1908 disk->offset = cpu_to_le64(cpu->offset);
1909 disk->type = cpu->type;
1910 disk->objectid = cpu_to_le64(cpu->objectid);
1913 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1914 struct btrfs_key *key, int nr)
1916 struct btrfs_disk_key disk_key;
1917 btrfs_node_key(eb, &disk_key, nr);
1918 btrfs_disk_key_to_cpu(key, &disk_key);
1921 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1922 struct btrfs_key *key, int nr)
1924 struct btrfs_disk_key disk_key;
1925 btrfs_item_key(eb, &disk_key, nr);
1926 btrfs_disk_key_to_cpu(key, &disk_key);
1929 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1930 const struct btrfs_dir_item *item,
1931 struct btrfs_key *key)
1933 struct btrfs_disk_key disk_key;
1934 btrfs_dir_item_key(eb, item, &disk_key);
1935 btrfs_disk_key_to_cpu(key, &disk_key);
1938 /* struct btrfs_header */
1939 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1940 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1942 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1943 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1944 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1945 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1946 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1948 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1949 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1951 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1953 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1955 return (btrfs_header_flags(eb) & flag) == flag;
1958 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1960 u64 flags = btrfs_header_flags(eb);
1961 btrfs_set_header_flags(eb, flags | flag);
1964 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1966 u64 flags = btrfs_header_flags(eb);
1967 btrfs_set_header_flags(eb, flags & ~flag);
1970 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1972 u64 flags = btrfs_header_flags(eb);
1973 return flags >> BTRFS_BACKREF_REV_SHIFT;
1976 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1979 u64 flags = btrfs_header_flags(eb);
1980 flags &= ~BTRFS_BACKREF_REV_MASK;
1981 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1982 btrfs_set_header_flags(eb, flags);
1985 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1987 return btrfs_header_level(eb) == 0;
1990 /* struct btrfs_root_item */
1991 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1993 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1994 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1995 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1997 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1999 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2000 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2001 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2002 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2003 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2004 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2005 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2006 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2008 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2010 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2012 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2014 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2016 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2019 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2021 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2024 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2026 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2029 /* struct btrfs_root_backup */
2030 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2032 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2034 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2035 tree_root_level, 8);
2037 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2039 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2040 chunk_root_gen, 64);
2041 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2042 chunk_root_level, 8);
2044 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2046 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2047 extent_root_gen, 64);
2048 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2049 extent_root_level, 8);
2051 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2053 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2055 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2058 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2060 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2062 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2065 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2067 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2069 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2070 csum_root_level, 8);
2071 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2073 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2075 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2078 /* struct btrfs_balance_item */
2079 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2081 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2082 const struct btrfs_balance_item *bi,
2083 struct btrfs_disk_balance_args *ba)
2085 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2088 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2089 struct btrfs_balance_item *bi,
2090 const struct btrfs_disk_balance_args *ba)
2092 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2095 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2096 const struct btrfs_balance_item *bi,
2097 struct btrfs_disk_balance_args *ba)
2099 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2102 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2103 struct btrfs_balance_item *bi,
2104 const struct btrfs_disk_balance_args *ba)
2106 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2109 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2110 const struct btrfs_balance_item *bi,
2111 struct btrfs_disk_balance_args *ba)
2113 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2116 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2117 struct btrfs_balance_item *bi,
2118 const struct btrfs_disk_balance_args *ba)
2120 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2124 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2125 const struct btrfs_disk_balance_args *disk)
2127 memset(cpu, 0, sizeof(*cpu));
2129 cpu->profiles = le64_to_cpu(disk->profiles);
2130 cpu->usage = le64_to_cpu(disk->usage);
2131 cpu->devid = le64_to_cpu(disk->devid);
2132 cpu->pstart = le64_to_cpu(disk->pstart);
2133 cpu->pend = le64_to_cpu(disk->pend);
2134 cpu->vstart = le64_to_cpu(disk->vstart);
2135 cpu->vend = le64_to_cpu(disk->vend);
2136 cpu->target = le64_to_cpu(disk->target);
2137 cpu->flags = le64_to_cpu(disk->flags);
2138 cpu->limit = le64_to_cpu(disk->limit);
2139 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2140 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2144 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2145 const struct btrfs_balance_args *cpu)
2147 memset(disk, 0, sizeof(*disk));
2149 disk->profiles = cpu_to_le64(cpu->profiles);
2150 disk->usage = cpu_to_le64(cpu->usage);
2151 disk->devid = cpu_to_le64(cpu->devid);
2152 disk->pstart = cpu_to_le64(cpu->pstart);
2153 disk->pend = cpu_to_le64(cpu->pend);
2154 disk->vstart = cpu_to_le64(cpu->vstart);
2155 disk->vend = cpu_to_le64(cpu->vend);
2156 disk->target = cpu_to_le64(cpu->target);
2157 disk->flags = cpu_to_le64(cpu->flags);
2158 disk->limit = cpu_to_le64(cpu->limit);
2159 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2160 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2163 /* struct btrfs_super_block */
2164 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2165 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2166 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2168 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2169 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2170 struct btrfs_super_block, sys_chunk_array_size, 32);
2171 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2172 struct btrfs_super_block, chunk_root_generation, 64);
2173 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2175 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2177 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2178 chunk_root_level, 8);
2179 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2181 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2182 log_root_transid, 64);
2183 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2185 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2187 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2189 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2191 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2193 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2195 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2196 root_dir_objectid, 64);
2197 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2199 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2201 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2202 compat_ro_flags, 64);
2203 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2204 incompat_flags, 64);
2205 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2207 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2208 cache_generation, 64);
2209 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2210 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2211 uuid_tree_generation, 64);
2213 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2214 const char *btrfs_super_csum_name(u16 csum_type);
2215 const char *btrfs_super_csum_driver(u16 csum_type);
2216 size_t __const btrfs_get_num_csums(void);
2220 * The leaf data grows from end-to-front in the node.
2221 * this returns the address of the start of the last item,
2222 * which is the stop of the leaf data stack
2224 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2226 u32 nr = btrfs_header_nritems(leaf);
2229 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2230 return btrfs_item_offset_nr(leaf, nr - 1);
2233 /* struct btrfs_file_extent_item */
2234 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2235 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2236 struct btrfs_file_extent_item, disk_bytenr, 64);
2237 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2238 struct btrfs_file_extent_item, offset, 64);
2239 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2240 struct btrfs_file_extent_item, generation, 64);
2241 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2242 struct btrfs_file_extent_item, num_bytes, 64);
2243 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2244 struct btrfs_file_extent_item, disk_num_bytes, 64);
2245 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2246 struct btrfs_file_extent_item, compression, 8);
2248 static inline unsigned long
2249 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2251 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2254 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2256 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2259 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2261 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2263 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2264 disk_num_bytes, 64);
2265 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2267 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2269 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2271 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2273 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2275 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2276 other_encoding, 16);
2279 * this returns the number of bytes used by the item on disk, minus the
2280 * size of any extent headers. If a file is compressed on disk, this is
2281 * the compressed size
2283 static inline u32 btrfs_file_extent_inline_item_len(
2284 const struct extent_buffer *eb,
2285 struct btrfs_item *e)
2287 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2290 /* btrfs_qgroup_status_item */
2291 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2293 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2295 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2297 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2300 /* btrfs_qgroup_info_item */
2301 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2303 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2304 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2306 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2307 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2310 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2311 struct btrfs_qgroup_info_item, generation, 64);
2312 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2314 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2315 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2316 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2318 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2319 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2321 /* btrfs_qgroup_limit_item */
2322 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2324 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2326 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2328 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2330 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2333 /* btrfs_dev_replace_item */
2334 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2335 struct btrfs_dev_replace_item, src_devid, 64);
2336 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2337 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2339 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2341 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2343 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2345 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2346 num_write_errors, 64);
2347 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2348 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2350 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2352 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2355 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2356 struct btrfs_dev_replace_item, src_devid, 64);
2357 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2358 struct btrfs_dev_replace_item,
2359 cont_reading_from_srcdev_mode, 64);
2360 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2361 struct btrfs_dev_replace_item, replace_state, 64);
2362 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2363 struct btrfs_dev_replace_item, time_started, 64);
2364 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2365 struct btrfs_dev_replace_item, time_stopped, 64);
2366 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2367 struct btrfs_dev_replace_item, num_write_errors, 64);
2368 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2369 struct btrfs_dev_replace_item,
2370 num_uncorrectable_read_errors, 64);
2371 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2372 struct btrfs_dev_replace_item, cursor_left, 64);
2373 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2374 struct btrfs_dev_replace_item, cursor_right, 64);
2376 /* helper function to cast into the data area of the leaf. */
2377 #define btrfs_item_ptr(leaf, slot, type) \
2378 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2379 btrfs_item_offset_nr(leaf, slot)))
2381 #define btrfs_item_ptr_offset(leaf, slot) \
2382 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2383 btrfs_item_offset_nr(leaf, slot)))
2385 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2387 return crc32c(crc, address, length);
2390 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2392 put_unaligned_le32(~crc, result);
2395 static inline u64 btrfs_name_hash(const char *name, int len)
2397 return crc32c((u32)~1, name, len);
2401 * Figure the key offset of an extended inode ref
2403 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2406 return (u64) crc32c(parent_objectid, name, len);
2409 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2411 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2416 enum btrfs_inline_ref_type {
2417 BTRFS_REF_TYPE_INVALID,
2418 BTRFS_REF_TYPE_BLOCK,
2419 BTRFS_REF_TYPE_DATA,
2423 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2424 struct btrfs_extent_inline_ref *iref,
2425 enum btrfs_inline_ref_type is_data);
2426 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2428 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2431 * Use this if we would be adding new items, as we could split nodes as we cow
2434 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2437 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2441 * Doing a truncate or a modification won't result in new nodes or leaves, just
2442 * what we need for COW.
2444 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2447 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2450 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2451 u64 start, u64 num_bytes);
2452 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2453 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2454 unsigned long count);
2455 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2456 struct btrfs_delayed_ref_root *delayed_refs,
2457 struct btrfs_delayed_ref_head *head);
2458 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2459 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2460 struct btrfs_fs_info *fs_info, u64 bytenr,
2461 u64 offset, int metadata, u64 *refs, u64 *flags);
2462 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2464 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2465 u64 bytenr, u64 num_bytes);
2466 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2467 int btrfs_cross_ref_exist(struct btrfs_root *root,
2468 u64 objectid, u64 offset, u64 bytenr);
2469 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2470 struct btrfs_root *root,
2471 u64 parent, u64 root_objectid,
2472 const struct btrfs_disk_key *key,
2473 int level, u64 hint,
2475 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root,
2477 struct extent_buffer *buf,
2478 u64 parent, int last_ref);
2479 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2480 struct btrfs_root *root, u64 owner,
2481 u64 offset, u64 ram_bytes,
2482 struct btrfs_key *ins);
2483 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2484 u64 root_objectid, u64 owner, u64 offset,
2485 struct btrfs_key *ins);
2486 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2487 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2488 struct btrfs_key *ins, int is_data, int delalloc);
2489 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2490 struct extent_buffer *buf, int full_backref);
2491 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2492 struct extent_buffer *buf, int full_backref);
2493 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2494 struct extent_buffer *eb, u64 flags,
2495 int level, int is_data);
2496 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2498 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2499 u64 start, u64 len, int delalloc);
2500 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2502 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2503 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2504 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2505 struct btrfs_ref *generic_ref);
2507 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2508 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2510 enum btrfs_reserve_flush_enum {
2511 /* If we are in the transaction, we can't flush anything.*/
2512 BTRFS_RESERVE_NO_FLUSH,
2514 * Flushing delalloc may cause deadlock somewhere, in this
2515 * case, use FLUSH LIMIT
2517 BTRFS_RESERVE_FLUSH_LIMIT,
2518 BTRFS_RESERVE_FLUSH_EVICT,
2519 BTRFS_RESERVE_FLUSH_ALL,
2520 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2523 enum btrfs_flush_state {
2524 FLUSH_DELAYED_ITEMS_NR = 1,
2525 FLUSH_DELAYED_ITEMS = 2,
2526 FLUSH_DELAYED_REFS_NR = 3,
2527 FLUSH_DELAYED_REFS = 4,
2529 FLUSH_DELALLOC_WAIT = 6,
2531 ALLOC_CHUNK_FORCE = 8,
2532 RUN_DELAYED_IPUTS = 9,
2536 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2537 struct btrfs_block_rsv *rsv,
2538 int nitems, bool use_global_rsv);
2539 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2540 struct btrfs_block_rsv *rsv);
2541 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2543 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2544 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2545 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2546 u64 start, u64 end);
2547 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2548 u64 num_bytes, u64 *actual_bytes);
2549 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2551 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2552 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2553 struct btrfs_fs_info *fs_info);
2554 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2555 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2556 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2559 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2561 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2562 int btrfs_previous_item(struct btrfs_root *root,
2563 struct btrfs_path *path, u64 min_objectid,
2565 int btrfs_previous_extent_item(struct btrfs_root *root,
2566 struct btrfs_path *path, u64 min_objectid);
2567 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2568 struct btrfs_path *path,
2569 const struct btrfs_key *new_key);
2570 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2571 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2572 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2573 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2574 struct btrfs_key *key, int lowest_level,
2576 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2577 struct btrfs_path *path,
2579 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2582 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2583 struct btrfs_root *root, struct extent_buffer *buf,
2584 struct extent_buffer *parent, int parent_slot,
2585 struct extent_buffer **cow_ret);
2586 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2587 struct btrfs_root *root,
2588 struct extent_buffer *buf,
2589 struct extent_buffer **cow_ret, u64 new_root_objectid);
2590 int btrfs_block_can_be_shared(struct btrfs_root *root,
2591 struct extent_buffer *buf);
2592 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2593 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2594 int btrfs_split_item(struct btrfs_trans_handle *trans,
2595 struct btrfs_root *root,
2596 struct btrfs_path *path,
2597 const struct btrfs_key *new_key,
2598 unsigned long split_offset);
2599 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2600 struct btrfs_root *root,
2601 struct btrfs_path *path,
2602 const struct btrfs_key *new_key);
2603 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2604 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2605 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2606 const struct btrfs_key *key, struct btrfs_path *p,
2607 int ins_len, int cow);
2608 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2609 struct btrfs_path *p, u64 time_seq);
2610 int btrfs_search_slot_for_read(struct btrfs_root *root,
2611 const struct btrfs_key *key,
2612 struct btrfs_path *p, int find_higher,
2614 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2615 struct btrfs_root *root, struct extent_buffer *parent,
2616 int start_slot, u64 *last_ret,
2617 struct btrfs_key *progress);
2618 void btrfs_release_path(struct btrfs_path *p);
2619 struct btrfs_path *btrfs_alloc_path(void);
2620 void btrfs_free_path(struct btrfs_path *p);
2622 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2623 struct btrfs_path *path, int slot, int nr);
2624 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2625 struct btrfs_root *root,
2626 struct btrfs_path *path)
2628 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2631 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2632 const struct btrfs_key *cpu_key, u32 *data_size,
2633 u32 total_data, u32 total_size, int nr);
2634 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2635 const struct btrfs_key *key, void *data, u32 data_size);
2636 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2637 struct btrfs_root *root,
2638 struct btrfs_path *path,
2639 const struct btrfs_key *cpu_key, u32 *data_size,
2642 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2643 struct btrfs_root *root,
2644 struct btrfs_path *path,
2645 const struct btrfs_key *key,
2648 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2651 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2652 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2653 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2655 static inline int btrfs_next_old_item(struct btrfs_root *root,
2656 struct btrfs_path *p, u64 time_seq)
2659 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2660 return btrfs_next_old_leaf(root, p, time_seq);
2663 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2665 return btrfs_next_old_item(root, p, 0);
2667 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2668 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2670 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2671 struct btrfs_root *root,
2672 struct extent_buffer *node,
2673 struct extent_buffer *parent);
2674 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2677 * Do it this way so we only ever do one test_bit in the normal case.
2679 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2680 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2688 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2689 * anything except sleeping. This function is used to check the status of
2692 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2694 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2697 /* tree mod log functions from ctree.c */
2698 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2699 struct seq_list *elem);
2700 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2701 struct seq_list *elem);
2702 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2705 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2706 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2708 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2709 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2711 int btrfs_del_root(struct btrfs_trans_handle *trans,
2712 const struct btrfs_key *key);
2713 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2714 const struct btrfs_key *key,
2715 struct btrfs_root_item *item);
2716 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2717 struct btrfs_root *root,
2718 struct btrfs_key *key,
2719 struct btrfs_root_item *item);
2720 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2721 struct btrfs_path *path, struct btrfs_root_item *root_item,
2722 struct btrfs_key *root_key);
2723 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2724 void btrfs_set_root_node(struct btrfs_root_item *item,
2725 struct extent_buffer *node);
2726 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2727 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2728 struct btrfs_root *root);
2731 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2733 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2735 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2738 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2739 const char *name, int name_len);
2740 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2741 int name_len, struct btrfs_inode *dir,
2742 struct btrfs_key *location, u8 type, u64 index);
2743 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2744 struct btrfs_root *root,
2745 struct btrfs_path *path, u64 dir,
2746 const char *name, int name_len,
2748 struct btrfs_dir_item *
2749 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2750 struct btrfs_root *root,
2751 struct btrfs_path *path, u64 dir,
2752 u64 objectid, const char *name, int name_len,
2754 struct btrfs_dir_item *
2755 btrfs_search_dir_index_item(struct btrfs_root *root,
2756 struct btrfs_path *path, u64 dirid,
2757 const char *name, int name_len);
2758 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2759 struct btrfs_root *root,
2760 struct btrfs_path *path,
2761 struct btrfs_dir_item *di);
2762 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2763 struct btrfs_root *root,
2764 struct btrfs_path *path, u64 objectid,
2765 const char *name, u16 name_len,
2766 const void *data, u16 data_len);
2767 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2768 struct btrfs_root *root,
2769 struct btrfs_path *path, u64 dir,
2770 const char *name, u16 name_len,
2772 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2773 struct btrfs_path *path,
2778 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2779 struct btrfs_root *root, u64 offset);
2780 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2781 struct btrfs_root *root, u64 offset);
2782 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2785 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2786 struct btrfs_root *root,
2787 const char *name, int name_len,
2788 u64 inode_objectid, u64 ref_objectid, u64 index);
2789 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2790 struct btrfs_root *root,
2791 const char *name, int name_len,
2792 u64 inode_objectid, u64 ref_objectid, u64 *index);
2793 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2794 struct btrfs_root *root,
2795 struct btrfs_path *path, u64 objectid);
2796 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2797 *root, struct btrfs_path *path,
2798 struct btrfs_key *location, int mod);
2800 struct btrfs_inode_extref *
2801 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2802 struct btrfs_root *root,
2803 struct btrfs_path *path,
2804 const char *name, int name_len,
2805 u64 inode_objectid, u64 ref_objectid, int ins_len,
2808 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2809 int slot, const char *name,
2811 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2812 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2813 const char *name, int name_len);
2815 struct btrfs_dio_private;
2816 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2817 struct btrfs_root *root, u64 bytenr, u64 len);
2818 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2819 u64 offset, u8 *dst);
2820 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2821 struct btrfs_root *root,
2822 u64 objectid, u64 pos,
2823 u64 disk_offset, u64 disk_num_bytes,
2824 u64 num_bytes, u64 offset, u64 ram_bytes,
2825 u8 compression, u8 encryption, u16 other_encoding);
2826 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2827 struct btrfs_root *root,
2828 struct btrfs_path *path, u64 objectid,
2829 u64 bytenr, int mod);
2830 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2831 struct btrfs_root *root,
2832 struct btrfs_ordered_sum *sums);
2833 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2834 u64 file_start, int contig);
2835 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2836 struct list_head *list, int search_commit);
2837 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2838 const struct btrfs_path *path,
2839 struct btrfs_file_extent_item *fi,
2840 const bool new_inline,
2841 struct extent_map *em);
2842 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
2844 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
2846 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size);
2847 u64 btrfs_file_extent_end(const struct btrfs_path *path);
2850 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2851 u64 start, u64 len);
2852 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2853 u64 *orig_start, u64 *orig_block_len,
2856 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2857 struct btrfs_inode *inode);
2858 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2859 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2860 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2861 struct btrfs_root *root,
2862 struct btrfs_inode *dir, struct btrfs_inode *inode,
2863 const char *name, int name_len);
2864 int btrfs_add_link(struct btrfs_trans_handle *trans,
2865 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2866 const char *name, int name_len, int add_backref, u64 index);
2867 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2868 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2870 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root,
2872 struct inode *inode, u64 new_size,
2875 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2876 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2877 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2878 unsigned int extra_bits,
2879 struct extent_state **cached_state);
2880 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2881 struct btrfs_root *new_root,
2882 struct btrfs_root *parent_root,
2884 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2886 void btrfs_clear_delalloc_extent(struct inode *inode,
2887 struct extent_state *state, unsigned *bits);
2888 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2889 struct extent_state *other);
2890 void btrfs_split_delalloc_extent(struct inode *inode,
2891 struct extent_state *orig, u64 split);
2892 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2893 unsigned long bio_flags);
2894 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2895 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2896 int btrfs_readpage(struct file *file, struct page *page);
2897 void btrfs_evict_inode(struct inode *inode);
2898 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2899 struct inode *btrfs_alloc_inode(struct super_block *sb);
2900 void btrfs_destroy_inode(struct inode *inode);
2901 void btrfs_free_inode(struct inode *inode);
2902 int btrfs_drop_inode(struct inode *inode);
2903 int __init btrfs_init_cachep(void);
2904 void __cold btrfs_destroy_cachep(void);
2905 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
2906 struct btrfs_root *root, struct btrfs_path *path);
2907 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
2908 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2909 struct page *page, size_t pg_offset,
2910 u64 start, u64 end);
2911 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2912 struct btrfs_root *root,
2913 struct inode *inode);
2914 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2915 struct btrfs_root *root, struct inode *inode);
2916 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2917 struct btrfs_inode *inode);
2918 int btrfs_orphan_cleanup(struct btrfs_root *root);
2919 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2920 void btrfs_add_delayed_iput(struct inode *inode);
2921 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2922 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2923 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2924 u64 start, u64 num_bytes, u64 min_size,
2925 loff_t actual_len, u64 *alloc_hint);
2926 int btrfs_prealloc_file_range_trans(struct inode *inode,
2927 struct btrfs_trans_handle *trans, int mode,
2928 u64 start, u64 num_bytes, u64 min_size,
2929 loff_t actual_len, u64 *alloc_hint);
2930 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2931 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2932 struct writeback_control *wbc);
2933 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2934 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2935 u64 end, int uptodate);
2936 extern const struct dentry_operations btrfs_dentry_operations;
2937 ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter);
2938 extern const struct iomap_ops btrfs_dio_iomap_ops;
2939 extern const struct iomap_dio_ops btrfs_dops;
2942 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2943 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2944 int btrfs_ioctl_get_supported_features(void __user *arg);
2945 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2946 int __pure btrfs_is_empty_uuid(u8 *uuid);
2947 int btrfs_defrag_file(struct inode *inode, struct file *file,
2948 struct btrfs_ioctl_defrag_range_args *range,
2949 u64 newer_than, unsigned long max_pages);
2950 void btrfs_get_block_group_info(struct list_head *groups_list,
2951 struct btrfs_ioctl_space_info *space);
2952 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2953 struct btrfs_ioctl_balance_args *bargs);
2956 int __init btrfs_auto_defrag_init(void);
2957 void __cold btrfs_auto_defrag_exit(void);
2958 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2959 struct btrfs_inode *inode);
2960 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2961 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2962 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2963 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2965 extern const struct file_operations btrfs_file_operations;
2966 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2967 struct btrfs_root *root, struct inode *inode,
2968 struct btrfs_path *path, u64 start, u64 end,
2969 u64 *drop_end, int drop_cache,
2971 u32 extent_item_size,
2973 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2974 struct btrfs_root *root, struct inode *inode, u64 start,
2975 u64 end, int drop_cache);
2976 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2977 const u64 start, const u64 end,
2978 struct btrfs_clone_extent_info *clone_info,
2979 struct btrfs_trans_handle **trans_out);
2980 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2981 struct btrfs_inode *inode, u64 start, u64 end);
2982 int btrfs_release_file(struct inode *inode, struct file *file);
2983 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2984 size_t num_pages, loff_t pos, size_t write_bytes,
2985 struct extent_state **cached);
2986 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2989 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2990 struct btrfs_root *root);
2993 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
2994 unsigned long new_flags);
2995 int btrfs_sync_fs(struct super_block *sb, int wait);
2996 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
2997 u64 subvol_objectid);
2999 static inline __printf(2, 3) __cold
3000 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3004 #ifdef CONFIG_PRINTK
3007 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3009 #define btrfs_printk(fs_info, fmt, args...) \
3010 btrfs_no_printk(fs_info, fmt, ##args)
3013 #define btrfs_emerg(fs_info, fmt, args...) \
3014 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3015 #define btrfs_alert(fs_info, fmt, args...) \
3016 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3017 #define btrfs_crit(fs_info, fmt, args...) \
3018 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3019 #define btrfs_err(fs_info, fmt, args...) \
3020 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3021 #define btrfs_warn(fs_info, fmt, args...) \
3022 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3023 #define btrfs_notice(fs_info, fmt, args...) \
3024 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3025 #define btrfs_info(fs_info, fmt, args...) \
3026 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3029 * Wrappers that use printk_in_rcu
3031 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3032 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3033 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3034 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3035 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3036 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3037 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3038 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3039 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3040 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3041 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3042 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3043 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3044 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3047 * Wrappers that use a ratelimited printk_in_rcu
3049 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3050 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3051 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3052 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3053 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3054 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3055 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3056 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3057 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3058 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3059 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3060 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3061 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3062 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3065 * Wrappers that use a ratelimited printk
3067 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3068 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3069 #define btrfs_alert_rl(fs_info, fmt, args...) \
3070 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3071 #define btrfs_crit_rl(fs_info, fmt, args...) \
3072 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3073 #define btrfs_err_rl(fs_info, fmt, args...) \
3074 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3075 #define btrfs_warn_rl(fs_info, fmt, args...) \
3076 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3077 #define btrfs_notice_rl(fs_info, fmt, args...) \
3078 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3079 #define btrfs_info_rl(fs_info, fmt, args...) \
3080 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3082 #if defined(CONFIG_DYNAMIC_DEBUG)
3083 #define btrfs_debug(fs_info, fmt, args...) \
3084 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3085 fs_info, KERN_DEBUG fmt, ##args)
3086 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3087 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3088 fs_info, KERN_DEBUG fmt, ##args)
3089 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3090 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3091 fs_info, KERN_DEBUG fmt, ##args)
3092 #define btrfs_debug_rl(fs_info, fmt, args...) \
3093 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3094 fs_info, KERN_DEBUG fmt, ##args)
3095 #elif defined(DEBUG)
3096 #define btrfs_debug(fs_info, fmt, args...) \
3097 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3098 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3099 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3100 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3101 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3102 #define btrfs_debug_rl(fs_info, fmt, args...) \
3103 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3105 #define btrfs_debug(fs_info, fmt, args...) \
3106 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3107 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3108 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3109 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3110 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3111 #define btrfs_debug_rl(fs_info, fmt, args...) \
3112 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3115 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3118 btrfs_printk(fs_info, fmt, ##args); \
3119 rcu_read_unlock(); \
3122 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3125 btrfs_no_printk(fs_info, fmt, ##args); \
3126 rcu_read_unlock(); \
3129 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3131 static DEFINE_RATELIMIT_STATE(_rs, \
3132 DEFAULT_RATELIMIT_INTERVAL, \
3133 DEFAULT_RATELIMIT_BURST); \
3134 if (__ratelimit(&_rs)) \
3135 btrfs_printk(fs_info, fmt, ##args); \
3138 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3141 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3142 rcu_read_unlock(); \
3145 #ifdef CONFIG_BTRFS_ASSERT
3147 static inline void assertfail(const char *expr, const char *file, int line)
3149 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3153 #define ASSERT(expr) \
3154 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3157 static inline void assertfail(const char *expr, const char* file, int line) { }
3158 #define ASSERT(expr) (void)(expr)
3162 * Use that for functions that are conditionally exported for sanity tests but
3165 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3166 #define EXPORT_FOR_TESTS static
3168 #define EXPORT_FOR_TESTS
3172 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3175 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3180 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3181 unsigned int line, int errno, const char *fmt, ...);
3183 const char * __attribute_const__ btrfs_decode_error(int errno);
3186 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3187 const char *function,
3188 unsigned int line, int errno);
3191 * Call btrfs_abort_transaction as early as possible when an error condition is
3192 * detected, that way the exact line number is reported.
3194 #define btrfs_abort_transaction(trans, errno) \
3196 /* Report first abort since mount */ \
3197 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3198 &((trans)->fs_info->fs_state))) { \
3199 if ((errno) != -EIO) { \
3200 WARN(1, KERN_DEBUG \
3201 "BTRFS: Transaction aborted (error %d)\n", \
3204 btrfs_debug((trans)->fs_info, \
3205 "Transaction aborted (error %d)", \
3209 __btrfs_abort_transaction((trans), __func__, \
3210 __LINE__, (errno)); \
3213 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3215 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3216 (errno), fmt, ##args); \
3221 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3222 unsigned int line, int errno, const char *fmt, ...);
3224 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3225 * will panic(). Otherwise we BUG() here.
3227 #define btrfs_panic(fs_info, errno, fmt, args...) \
3229 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3234 /* compatibility and incompatibility defines */
3236 #define btrfs_set_fs_incompat(__fs_info, opt) \
3237 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3240 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3241 u64 flag, const char* name)
3243 struct btrfs_super_block *disk_super;
3246 disk_super = fs_info->super_copy;
3247 features = btrfs_super_incompat_flags(disk_super);
3248 if (!(features & flag)) {
3249 spin_lock(&fs_info->super_lock);
3250 features = btrfs_super_incompat_flags(disk_super);
3251 if (!(features & flag)) {
3253 btrfs_set_super_incompat_flags(disk_super, features);
3255 "setting incompat feature flag for %s (0x%llx)",
3258 spin_unlock(&fs_info->super_lock);
3262 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3263 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3266 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3267 u64 flag, const char* name)
3269 struct btrfs_super_block *disk_super;
3272 disk_super = fs_info->super_copy;
3273 features = btrfs_super_incompat_flags(disk_super);
3274 if (features & flag) {
3275 spin_lock(&fs_info->super_lock);
3276 features = btrfs_super_incompat_flags(disk_super);
3277 if (features & flag) {
3279 btrfs_set_super_incompat_flags(disk_super, features);
3281 "clearing incompat feature flag for %s (0x%llx)",
3284 spin_unlock(&fs_info->super_lock);
3288 #define btrfs_fs_incompat(fs_info, opt) \
3289 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3291 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3293 struct btrfs_super_block *disk_super;
3294 disk_super = fs_info->super_copy;
3295 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3298 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3299 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3302 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3303 u64 flag, const char *name)
3305 struct btrfs_super_block *disk_super;
3308 disk_super = fs_info->super_copy;
3309 features = btrfs_super_compat_ro_flags(disk_super);
3310 if (!(features & flag)) {
3311 spin_lock(&fs_info->super_lock);
3312 features = btrfs_super_compat_ro_flags(disk_super);
3313 if (!(features & flag)) {
3315 btrfs_set_super_compat_ro_flags(disk_super, features);
3317 "setting compat-ro feature flag for %s (0x%llx)",
3320 spin_unlock(&fs_info->super_lock);
3324 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3325 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3328 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3329 u64 flag, const char *name)
3331 struct btrfs_super_block *disk_super;
3334 disk_super = fs_info->super_copy;
3335 features = btrfs_super_compat_ro_flags(disk_super);
3336 if (features & flag) {
3337 spin_lock(&fs_info->super_lock);
3338 features = btrfs_super_compat_ro_flags(disk_super);
3339 if (features & flag) {
3341 btrfs_set_super_compat_ro_flags(disk_super, features);
3343 "clearing compat-ro feature flag for %s (0x%llx)",
3346 spin_unlock(&fs_info->super_lock);
3350 #define btrfs_fs_compat_ro(fs_info, opt) \
3351 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3353 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3355 struct btrfs_super_block *disk_super;
3356 disk_super = fs_info->super_copy;
3357 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3361 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3362 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3363 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3364 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3365 struct inode *inode, struct inode *dir);
3367 #define btrfs_get_acl NULL
3368 #define btrfs_set_acl NULL
3369 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3370 struct inode *inode, struct inode *dir)
3377 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3378 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3379 struct btrfs_root *root);
3380 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3381 struct btrfs_root *root);
3382 int btrfs_recover_relocation(struct btrfs_root *root);
3383 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3384 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3385 struct btrfs_root *root, struct extent_buffer *buf,
3386 struct extent_buffer *cow);
3387 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3388 u64 *bytes_to_reserve);
3389 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3390 struct btrfs_pending_snapshot *pending);
3391 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3392 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3394 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3397 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3398 u64 end, struct btrfs_scrub_progress *progress,
3399 int readonly, int is_dev_replace);
3400 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3401 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3402 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3403 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3404 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3405 struct btrfs_scrub_progress *progress);
3406 static inline void btrfs_init_full_stripe_locks_tree(
3407 struct btrfs_full_stripe_locks_tree *locks_root)
3409 locks_root->root = RB_ROOT;
3410 mutex_init(&locks_root->lock);
3414 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3415 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3416 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3418 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3420 btrfs_bio_counter_sub(fs_info, 1);
3424 struct reada_control {
3425 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3426 struct btrfs_key key_start;
3427 struct btrfs_key key_end; /* exclusive */
3430 wait_queue_head_t wait;
3432 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3433 struct btrfs_key *start, struct btrfs_key *end);
3434 int btrfs_reada_wait(void *handle);
3435 void btrfs_reada_detach(void *handle);
3436 int btree_readahead_hook(struct extent_buffer *eb, int err);
3438 static inline int is_fstree(u64 rootid)
3440 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3441 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3442 !btrfs_qgroup_level(rootid)))
3447 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3449 return signal_pending(current);
3452 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3454 /* Sanity test specific functions */
3455 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3456 void btrfs_test_inode_set_ops(struct inode *inode);
3457 void btrfs_test_destroy_inode(struct inode *inode);
3459 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3461 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3464 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)