1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
38 struct btrfs_trans_handle;
39 struct btrfs_transaction;
40 struct btrfs_pending_snapshot;
41 struct btrfs_delayed_ref_root;
42 struct btrfs_space_info;
43 struct btrfs_block_group;
44 extern struct kmem_cache *btrfs_trans_handle_cachep;
45 extern struct kmem_cache *btrfs_bit_radix_cachep;
46 extern struct kmem_cache *btrfs_path_cachep;
47 extern struct kmem_cache *btrfs_free_space_cachep;
48 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
49 struct btrfs_ordered_sum;
52 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
55 * Maximum number of mirrors that can be available for all profiles counting
56 * the target device of dev-replace as one. During an active device replace
57 * procedure, the target device of the copy operation is a mirror for the
58 * filesystem data as well that can be used to read data in order to repair
59 * read errors on other disks.
61 * Current value is derived from RAID1C4 with 4 copies.
63 #define BTRFS_MAX_MIRRORS (4 + 1)
65 #define BTRFS_MAX_LEVEL 8
67 #define BTRFS_OLDEST_GENERATION 0ULL
70 * the max metadata block size. This limit is somewhat artificial,
71 * but the memmove costs go through the roof for larger blocks.
73 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
76 * we can actually store much bigger names, but lets not confuse the rest
79 #define BTRFS_NAME_LEN 255
82 * Theoretical limit is larger, but we keep this down to a sane
83 * value. That should limit greatly the possibility of collisions on
86 #define BTRFS_LINK_MAX 65535U
88 #define BTRFS_EMPTY_DIR_SIZE 0
90 /* ioprio of readahead is set to idle */
91 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
93 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
96 * Use large batch size to reduce overhead of metadata updates. On the reader
97 * side, we only read it when we are close to ENOSPC and the read overhead is
98 * mostly related to the number of CPUs, so it is OK to use arbitrary large
101 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
103 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
106 * Deltas are an effective way to populate global statistics. Give macro names
107 * to make it clear what we're doing. An example is discard_extents in
108 * btrfs_free_space_ctl.
110 #define BTRFS_STAT_NR_ENTRIES 2
111 #define BTRFS_STAT_CURR 0
112 #define BTRFS_STAT_PREV 1
115 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
117 static inline u32 count_max_extents(u64 size)
119 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
122 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
124 BUG_ON(num_stripes == 0);
125 return sizeof(struct btrfs_chunk) +
126 sizeof(struct btrfs_stripe) * (num_stripes - 1);
130 * Runtime (in-memory) states of filesystem
133 /* Global indicator of serious filesystem errors */
134 BTRFS_FS_STATE_ERROR,
136 * Filesystem is being remounted, allow to skip some operations, like
139 BTRFS_FS_STATE_REMOUNTING,
140 /* Track if a transaction abort has been reported on this filesystem */
141 BTRFS_FS_STATE_TRANS_ABORTED,
143 * Bio operations should be blocked on this filesystem because a source
144 * or target device is being destroyed as part of a device replace
146 BTRFS_FS_STATE_DEV_REPLACING,
147 /* The btrfs_fs_info created for self-tests */
148 BTRFS_FS_STATE_DUMMY_FS_INFO,
151 #define BTRFS_BACKREF_REV_MAX 256
152 #define BTRFS_BACKREF_REV_SHIFT 56
153 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
154 BTRFS_BACKREF_REV_SHIFT)
156 #define BTRFS_OLD_BACKREF_REV 0
157 #define BTRFS_MIXED_BACKREF_REV 1
160 * every tree block (leaf or node) starts with this header.
162 struct btrfs_header {
163 /* these first four must match the super block */
164 u8 csum[BTRFS_CSUM_SIZE];
165 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
166 __le64 bytenr; /* which block this node is supposed to live in */
169 /* allowed to be different from the super from here on down */
170 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
175 } __attribute__ ((__packed__));
178 * this is a very generous portion of the super block, giving us
179 * room to translate 14 chunks with 3 stripes each.
181 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
184 * just in case we somehow lose the roots and are not able to mount,
185 * we store an array of the roots from previous transactions
188 #define BTRFS_NUM_BACKUP_ROOTS 4
189 struct btrfs_root_backup {
191 __le64 tree_root_gen;
194 __le64 chunk_root_gen;
197 __le64 extent_root_gen;
206 __le64 csum_root_gen;
216 u8 extent_root_level;
220 /* future and to align */
222 } __attribute__ ((__packed__));
225 * the super block basically lists the main trees of the FS
226 * it currently lacks any block count etc etc
228 struct btrfs_super_block {
229 /* the first 4 fields must match struct btrfs_header */
230 u8 csum[BTRFS_CSUM_SIZE];
231 /* FS specific UUID, visible to user */
232 u8 fsid[BTRFS_FSID_SIZE];
233 __le64 bytenr; /* this block number */
236 /* allowed to be different from the btrfs_header from here own down */
243 /* this will help find the new super based on the log root */
244 __le64 log_root_transid;
247 __le64 root_dir_objectid;
251 __le32 __unused_leafsize;
253 __le32 sys_chunk_array_size;
254 __le64 chunk_root_generation;
256 __le64 compat_ro_flags;
257 __le64 incompat_flags;
262 struct btrfs_dev_item dev_item;
264 char label[BTRFS_LABEL_SIZE];
266 __le64 cache_generation;
267 __le64 uuid_tree_generation;
269 /* the UUID written into btree blocks */
270 u8 metadata_uuid[BTRFS_FSID_SIZE];
272 /* future expansion */
274 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
275 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
276 } __attribute__ ((__packed__));
279 * Compat flags that we support. If any incompat flags are set other than the
280 * ones specified below then we will fail to mount
282 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
283 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
284 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
286 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
287 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
288 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
293 #define BTRFS_FEATURE_INCOMPAT_SUPP \
294 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
295 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
296 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
297 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
298 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
299 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
300 BTRFS_FEATURE_INCOMPAT_RAID56 | \
301 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
302 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
303 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
304 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
305 BTRFS_FEATURE_INCOMPAT_RAID1C34)
307 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
308 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
309 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
312 * A leaf is full of items. offset and size tell us where to find
313 * the item in the leaf (relative to the start of the data area)
316 struct btrfs_disk_key key;
319 } __attribute__ ((__packed__));
322 * leaves have an item area and a data area:
323 * [item0, item1....itemN] [free space] [dataN...data1, data0]
325 * The data is separate from the items to get the keys closer together
329 struct btrfs_header header;
330 struct btrfs_item items[];
331 } __attribute__ ((__packed__));
334 * all non-leaf blocks are nodes, they hold only keys and pointers to
337 struct btrfs_key_ptr {
338 struct btrfs_disk_key key;
341 } __attribute__ ((__packed__));
344 struct btrfs_header header;
345 struct btrfs_key_ptr ptrs[];
346 } __attribute__ ((__packed__));
349 * btrfs_paths remember the path taken from the root down to the leaf.
350 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
351 * to any other levels that are present.
353 * The slots array records the index of the item or block pointer
354 * used while walking the tree.
356 enum { READA_NONE, READA_BACK, READA_FORWARD };
358 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
359 int slots[BTRFS_MAX_LEVEL];
360 /* if there is real range locking, this locks field will change */
361 u8 locks[BTRFS_MAX_LEVEL];
363 /* keep some upper locks as we walk down */
367 * set by btrfs_split_item, tells search_slot to keep all locks
368 * and to force calls to keep space in the nodes
370 unsigned int search_for_split:1;
371 unsigned int keep_locks:1;
372 unsigned int skip_locking:1;
373 unsigned int leave_spinning:1;
374 unsigned int search_commit_root:1;
375 unsigned int need_commit_sem:1;
376 unsigned int skip_release_on_error:1;
378 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
379 sizeof(struct btrfs_item))
380 struct btrfs_dev_replace {
381 u64 replace_state; /* see #define above */
382 time64_t time_started; /* seconds since 1-Jan-1970 */
383 time64_t time_stopped; /* seconds since 1-Jan-1970 */
384 atomic64_t num_write_errors;
385 atomic64_t num_uncorrectable_read_errors;
388 u64 committed_cursor_left;
389 u64 cursor_left_last_write_of_item;
392 u64 cont_reading_from_srcdev_mode; /* see #define above */
395 int item_needs_writeback;
396 struct btrfs_device *srcdev;
397 struct btrfs_device *tgtdev;
399 struct mutex lock_finishing_cancel_unmount;
400 struct rw_semaphore rwsem;
402 struct btrfs_scrub_progress scrub_progress;
404 struct percpu_counter bio_counter;
405 wait_queue_head_t replace_wait;
409 * free clusters are used to claim free space in relatively large chunks,
410 * allowing us to do less seeky writes. They are used for all metadata
411 * allocations. In ssd_spread mode they are also used for data allocations.
413 struct btrfs_free_cluster {
415 spinlock_t refill_lock;
418 /* largest extent in this cluster */
421 /* first extent starting offset */
424 /* We did a full search and couldn't create a cluster */
427 struct btrfs_block_group *block_group;
429 * when a cluster is allocated from a block group, we put the
430 * cluster onto a list in the block group so that it can
431 * be freed before the block group is freed.
433 struct list_head block_group_list;
436 enum btrfs_caching_type {
440 BTRFS_CACHE_FINISHED,
445 * Tree to record all locked full stripes of a RAID5/6 block group
447 struct btrfs_full_stripe_locks_tree {
452 /* Discard control. */
454 * Async discard uses multiple lists to differentiate the discard filter
455 * parameters. Index 0 is for completely free block groups where we need to
456 * ensure the entire block group is trimmed without being lossy. Indices
457 * afterwards represent monotonically decreasing discard filter sizes to
458 * prioritize what should be discarded next.
460 #define BTRFS_NR_DISCARD_LISTS 3
461 #define BTRFS_DISCARD_INDEX_UNUSED 0
462 #define BTRFS_DISCARD_INDEX_START 1
464 struct btrfs_discard_ctl {
465 struct workqueue_struct *discard_workers;
466 struct delayed_work work;
468 struct btrfs_block_group *block_group;
469 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
471 atomic_t discardable_extents;
472 atomic64_t discardable_bytes;
473 u64 max_discard_size;
477 u64 discard_extent_bytes;
478 u64 discard_bitmap_bytes;
479 atomic64_t discard_bytes_saved;
482 /* delayed seq elem */
484 struct list_head list;
488 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
490 #define SEQ_LAST ((u64)-1)
492 enum btrfs_orphan_cleanup_state {
493 ORPHAN_CLEANUP_STARTED = 1,
494 ORPHAN_CLEANUP_DONE = 2,
497 void btrfs_init_async_reclaim_work(struct work_struct *work);
500 struct reloc_control;
502 struct btrfs_fs_devices;
503 struct btrfs_balance_control;
504 struct btrfs_delayed_root;
507 * Block group or device which contains an active swapfile. Used for preventing
508 * unsafe operations while a swapfile is active.
510 * These are sorted on (ptr, inode) (note that a block group or device can
511 * contain more than one swapfile). We compare the pointer values because we
512 * don't actually care what the object is, we just need a quick check whether
513 * the object exists in the rbtree.
515 struct btrfs_swapfile_pin {
520 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
521 * points to a struct btrfs_device.
526 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
530 BTRFS_FS_CLOSING_START,
531 BTRFS_FS_CLOSING_DONE,
532 BTRFS_FS_LOG_RECOVERING,
534 BTRFS_FS_QUOTA_ENABLED,
535 BTRFS_FS_UPDATE_UUID_TREE_GEN,
536 BTRFS_FS_CREATING_FREE_SPACE_TREE,
540 BTRFS_FS_QUOTA_OVERRIDE,
541 /* Used to record internally whether fs has been frozen */
544 * Indicate that a whole-filesystem exclusive operation is running
545 * (device replace, resize, device add/delete, balance)
549 * To info transaction_kthread we need an immediate commit so it
550 * doesn't need to wait for commit_interval
552 BTRFS_FS_NEED_ASYNC_COMMIT,
554 * Indicate that balance has been set up from the ioctl and is in the
555 * main phase. The fs_info::balance_ctl is initialized.
556 * Set and cleared while holding fs_info::balance_mutex.
558 BTRFS_FS_BALANCE_RUNNING,
560 /* Indicate that the cleaner thread is awake and doing something. */
561 BTRFS_FS_CLEANER_RUNNING,
564 * The checksumming has an optimized version and is considered fast,
565 * so we don't need to offload checksums to workqueues.
567 BTRFS_FS_CSUM_IMPL_FAST,
569 /* Indicate that the discard workqueue can service discards. */
570 BTRFS_FS_DISCARD_RUNNING,
573 struct btrfs_fs_info {
574 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
576 struct btrfs_root *extent_root;
577 struct btrfs_root *tree_root;
578 struct btrfs_root *chunk_root;
579 struct btrfs_root *dev_root;
580 struct btrfs_root *fs_root;
581 struct btrfs_root *csum_root;
582 struct btrfs_root *quota_root;
583 struct btrfs_root *uuid_root;
584 struct btrfs_root *free_space_root;
586 /* the log root tree is a directory of all the other log roots */
587 struct btrfs_root *log_root_tree;
589 spinlock_t fs_roots_radix_lock;
590 struct radix_tree_root fs_roots_radix;
592 /* block group cache stuff */
593 spinlock_t block_group_cache_lock;
594 u64 first_logical_byte;
595 struct rb_root block_group_cache_tree;
597 /* keep track of unallocated space */
598 atomic64_t free_chunk_space;
600 /* Track ranges which are used by log trees blocks/logged data extents */
601 struct extent_io_tree excluded_extents;
603 /* logical->physical extent mapping */
604 struct extent_map_tree mapping_tree;
607 * block reservation for extent, checksum, root tree and
608 * delayed dir index item
610 struct btrfs_block_rsv global_block_rsv;
611 /* block reservation for metadata operations */
612 struct btrfs_block_rsv trans_block_rsv;
613 /* block reservation for chunk tree */
614 struct btrfs_block_rsv chunk_block_rsv;
615 /* block reservation for delayed operations */
616 struct btrfs_block_rsv delayed_block_rsv;
617 /* block reservation for delayed refs */
618 struct btrfs_block_rsv delayed_refs_rsv;
620 struct btrfs_block_rsv empty_block_rsv;
623 u64 last_trans_committed;
624 u64 avg_delayed_ref_runtime;
627 * this is updated to the current trans every time a full commit
628 * is required instead of the faster short fsync log commits
630 u64 last_trans_log_full_commit;
631 unsigned long mount_opt;
633 * Track requests for actions that need to be done during transaction
634 * commit (like for some mount options).
636 unsigned long pending_changes;
637 unsigned long compress_type:4;
638 unsigned int compress_level;
641 * It is a suggestive number, the read side is safe even it gets a
642 * wrong number because we will write out the data into a regular
643 * extent. The write side(mount/remount) is under ->s_umount lock,
644 * so it is also safe.
648 struct btrfs_transaction *running_transaction;
649 wait_queue_head_t transaction_throttle;
650 wait_queue_head_t transaction_wait;
651 wait_queue_head_t transaction_blocked_wait;
652 wait_queue_head_t async_submit_wait;
655 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
656 * when they are updated.
658 * Because we do not clear the flags for ever, so we needn't use
659 * the lock on the read side.
661 * We also needn't use the lock when we mount the fs, because
662 * there is no other task which will update the flag.
664 spinlock_t super_lock;
665 struct btrfs_super_block *super_copy;
666 struct btrfs_super_block *super_for_commit;
667 struct super_block *sb;
668 struct inode *btree_inode;
669 struct mutex tree_log_mutex;
670 struct mutex transaction_kthread_mutex;
671 struct mutex cleaner_mutex;
672 struct mutex chunk_mutex;
675 * this is taken to make sure we don't set block groups ro after
676 * the free space cache has been allocated on them
678 struct mutex ro_block_group_mutex;
680 /* this is used during read/modify/write to make sure
681 * no two ios are trying to mod the same stripe at the same
684 struct btrfs_stripe_hash_table *stripe_hash_table;
687 * this protects the ordered operations list only while we are
688 * processing all of the entries on it. This way we make
689 * sure the commit code doesn't find the list temporarily empty
690 * because another function happens to be doing non-waiting preflush
691 * before jumping into the main commit.
693 struct mutex ordered_operations_mutex;
695 struct rw_semaphore commit_root_sem;
697 struct rw_semaphore cleanup_work_sem;
699 struct rw_semaphore subvol_sem;
700 struct srcu_struct subvol_srcu;
702 spinlock_t trans_lock;
704 * the reloc mutex goes with the trans lock, it is taken
705 * during commit to protect us from the relocation code
707 struct mutex reloc_mutex;
709 struct list_head trans_list;
710 struct list_head dead_roots;
711 struct list_head caching_block_groups;
713 spinlock_t delayed_iput_lock;
714 struct list_head delayed_iputs;
715 atomic_t nr_delayed_iputs;
716 wait_queue_head_t delayed_iputs_wait;
718 atomic64_t tree_mod_seq;
720 /* this protects tree_mod_log and tree_mod_seq_list */
721 rwlock_t tree_mod_log_lock;
722 struct rb_root tree_mod_log;
723 struct list_head tree_mod_seq_list;
725 atomic_t async_delalloc_pages;
728 * this is used to protect the following list -- ordered_roots.
730 spinlock_t ordered_root_lock;
733 * all fs/file tree roots in which there are data=ordered extents
734 * pending writeback are added into this list.
736 * these can span multiple transactions and basically include
737 * every dirty data page that isn't from nodatacow
739 struct list_head ordered_roots;
741 struct mutex delalloc_root_mutex;
742 spinlock_t delalloc_root_lock;
743 /* all fs/file tree roots that have delalloc inodes. */
744 struct list_head delalloc_roots;
747 * there is a pool of worker threads for checksumming during writes
748 * and a pool for checksumming after reads. This is because readers
749 * can run with FS locks held, and the writers may be waiting for
750 * those locks. We don't want ordering in the pending list to cause
751 * deadlocks, and so the two are serviced separately.
753 * A third pool does submit_bio to avoid deadlocking with the other
756 struct btrfs_workqueue *workers;
757 struct btrfs_workqueue *delalloc_workers;
758 struct btrfs_workqueue *flush_workers;
759 struct btrfs_workqueue *endio_workers;
760 struct btrfs_workqueue *endio_meta_workers;
761 struct btrfs_workqueue *endio_raid56_workers;
762 struct btrfs_workqueue *endio_repair_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;
955 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
957 return sb->s_fs_info;
961 * The state of btrfs root
965 * btrfs_record_root_in_trans is a multi-step process, and it can race
966 * with the balancing code. But the race is very small, and only the
967 * first time the root is added to each transaction. So IN_TRANS_SETUP
968 * is used to tell us when more checks are required
970 BTRFS_ROOT_IN_TRANS_SETUP,
972 BTRFS_ROOT_TRACK_DIRTY,
974 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
975 BTRFS_ROOT_DEFRAG_RUNNING,
976 BTRFS_ROOT_FORCE_COW,
977 BTRFS_ROOT_MULTI_LOG_TASKS,
982 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
984 * Set for the subvolume tree owning the reloc tree.
986 BTRFS_ROOT_DEAD_RELOC_TREE,
987 /* Mark dead root stored on device whose cleanup needs to be resumed */
988 BTRFS_ROOT_DEAD_TREE,
992 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
993 * code. For detail check comment in fs/btrfs/qgroup.c.
995 struct btrfs_qgroup_swapped_blocks {
997 /* RM_EMPTY_ROOT() of above blocks[] */
999 struct rb_root blocks[BTRFS_MAX_LEVEL];
1003 * in ram representation of the tree. extent_root is used for all allocations
1004 * and for the extent tree extent_root root.
1007 struct extent_buffer *node;
1009 struct extent_buffer *commit_root;
1010 struct btrfs_root *log_root;
1011 struct btrfs_root *reloc_root;
1013 unsigned long state;
1014 struct btrfs_root_item root_item;
1015 struct btrfs_key root_key;
1016 struct btrfs_fs_info *fs_info;
1017 struct extent_io_tree dirty_log_pages;
1019 struct mutex objectid_mutex;
1021 spinlock_t accounting_lock;
1022 struct btrfs_block_rsv *block_rsv;
1024 /* free ino cache stuff */
1025 struct btrfs_free_space_ctl *free_ino_ctl;
1026 enum btrfs_caching_type ino_cache_state;
1027 spinlock_t ino_cache_lock;
1028 wait_queue_head_t ino_cache_wait;
1029 struct btrfs_free_space_ctl *free_ino_pinned;
1030 u64 ino_cache_progress;
1031 struct inode *ino_cache_inode;
1033 struct mutex log_mutex;
1034 wait_queue_head_t log_writer_wait;
1035 wait_queue_head_t log_commit_wait[2];
1036 struct list_head log_ctxs[2];
1037 atomic_t log_writers;
1038 atomic_t log_commit[2];
1041 /* No matter the commit succeeds or not*/
1042 int log_transid_committed;
1043 /* Just be updated when the commit succeeds. */
1044 int last_log_commit;
1045 pid_t log_start_pid;
1051 u64 highest_objectid;
1053 u64 defrag_trans_start;
1054 struct btrfs_key defrag_progress;
1055 struct btrfs_key defrag_max;
1057 /* the dirty list is only used by non-reference counted roots */
1058 struct list_head dirty_list;
1060 struct list_head root_list;
1062 spinlock_t log_extents_lock[2];
1063 struct list_head logged_list[2];
1065 int orphan_cleanup_state;
1067 spinlock_t inode_lock;
1068 /* red-black tree that keeps track of in-memory inodes */
1069 struct rb_root inode_tree;
1072 * radix tree that keeps track of delayed nodes of every inode,
1073 * protected by inode_lock
1075 struct radix_tree_root delayed_nodes_tree;
1077 * right now this just gets used so that a root has its own devid
1078 * for stat. It may be used for more later
1082 spinlock_t root_item_lock;
1085 struct mutex delalloc_mutex;
1086 spinlock_t delalloc_lock;
1088 * all of the inodes that have delalloc bytes. It is possible for
1089 * this list to be empty even when there is still dirty data=ordered
1090 * extents waiting to finish IO.
1092 struct list_head delalloc_inodes;
1093 struct list_head delalloc_root;
1094 u64 nr_delalloc_inodes;
1096 struct mutex ordered_extent_mutex;
1098 * this is used by the balancing code to wait for all the pending
1101 spinlock_t ordered_extent_lock;
1104 * all of the data=ordered extents pending writeback
1105 * these can span multiple transactions and basically include
1106 * every dirty data page that isn't from nodatacow
1108 struct list_head ordered_extents;
1109 struct list_head ordered_root;
1110 u64 nr_ordered_extents;
1113 * Not empty if this subvolume root has gone through tree block swap
1116 * Will be used by reloc_control::dirty_subvol_roots.
1118 struct list_head reloc_dirty_list;
1121 * Number of currently running SEND ioctls to prevent
1122 * manipulation with the read-only status via SUBVOL_SETFLAGS
1124 int send_in_progress;
1126 * Number of currently running deduplication operations that have a
1127 * destination inode belonging to this root. Protected by the lock
1130 int dedupe_in_progress;
1131 /* For exclusion of snapshot creation and nocow writes */
1132 struct btrfs_drew_lock snapshot_lock;
1134 atomic_t snapshot_force_cow;
1136 /* For qgroup metadata reserved space */
1137 spinlock_t qgroup_meta_rsv_lock;
1138 u64 qgroup_meta_rsv_pertrans;
1139 u64 qgroup_meta_rsv_prealloc;
1141 /* Number of active swapfiles */
1142 atomic_t nr_swapfiles;
1144 /* Record pairs of swapped blocks for qgroup */
1145 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1147 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1151 #ifdef CONFIG_BTRFS_DEBUG
1152 struct list_head leak_list;
1156 struct btrfs_clone_extent_info {
1166 struct btrfs_file_private {
1170 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1172 return btrfs_sb(inode->i_sb)->sectorsize;
1175 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1178 return info->nodesize - sizeof(struct btrfs_header);
1181 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1183 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1185 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1188 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1190 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1193 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1194 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1195 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1197 return BTRFS_MAX_ITEM_SIZE(info) -
1198 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1201 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1203 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1207 * Flags for mount options.
1209 * Note: don't forget to add new options to btrfs_show_options()
1211 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1212 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1213 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1214 #define BTRFS_MOUNT_SSD (1 << 3)
1215 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1216 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1217 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1218 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1219 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1220 #define BTRFS_MOUNT_NOSSD (1 << 9)
1221 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1222 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1223 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1224 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1225 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1226 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1227 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1228 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1229 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1230 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1231 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1232 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1233 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1234 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1235 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1236 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1237 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1238 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1239 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1240 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1242 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1243 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1245 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1246 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1247 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1248 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1251 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1253 if (!btrfs_test_opt(fs_info, opt)) \
1254 btrfs_info(fs_info, fmt, ##args); \
1255 btrfs_set_opt(fs_info->mount_opt, opt); \
1258 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1260 if (btrfs_test_opt(fs_info, opt)) \
1261 btrfs_info(fs_info, fmt, ##args); \
1262 btrfs_clear_opt(fs_info->mount_opt, opt); \
1266 * Requests for changes that need to be done during transaction commit.
1268 * Internal mount options that are used for special handling of the real
1269 * mount options (eg. cannot be set during remount and have to be set during
1270 * transaction commit)
1273 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1274 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1275 #define BTRFS_PENDING_COMMIT (2)
1277 #define btrfs_test_pending(info, opt) \
1278 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1279 #define btrfs_set_pending(info, opt) \
1280 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1281 #define btrfs_clear_pending(info, opt) \
1282 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1285 * Helpers for setting pending mount option changes.
1287 * Expects corresponding macros
1288 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1290 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1292 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1293 btrfs_info((info), fmt, ##args); \
1294 btrfs_set_pending((info), SET_##opt); \
1295 btrfs_clear_pending((info), CLEAR_##opt); \
1299 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1301 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1302 btrfs_info((info), fmt, ##args); \
1303 btrfs_set_pending((info), CLEAR_##opt); \
1304 btrfs_clear_pending((info), SET_##opt); \
1311 #define BTRFS_INODE_NODATASUM (1 << 0)
1312 #define BTRFS_INODE_NODATACOW (1 << 1)
1313 #define BTRFS_INODE_READONLY (1 << 2)
1314 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1315 #define BTRFS_INODE_PREALLOC (1 << 4)
1316 #define BTRFS_INODE_SYNC (1 << 5)
1317 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1318 #define BTRFS_INODE_APPEND (1 << 7)
1319 #define BTRFS_INODE_NODUMP (1 << 8)
1320 #define BTRFS_INODE_NOATIME (1 << 9)
1321 #define BTRFS_INODE_DIRSYNC (1 << 10)
1322 #define BTRFS_INODE_COMPRESS (1 << 11)
1324 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1326 #define BTRFS_INODE_FLAG_MASK \
1327 (BTRFS_INODE_NODATASUM | \
1328 BTRFS_INODE_NODATACOW | \
1329 BTRFS_INODE_READONLY | \
1330 BTRFS_INODE_NOCOMPRESS | \
1331 BTRFS_INODE_PREALLOC | \
1332 BTRFS_INODE_SYNC | \
1333 BTRFS_INODE_IMMUTABLE | \
1334 BTRFS_INODE_APPEND | \
1335 BTRFS_INODE_NODUMP | \
1336 BTRFS_INODE_NOATIME | \
1337 BTRFS_INODE_DIRSYNC | \
1338 BTRFS_INODE_COMPRESS | \
1339 BTRFS_INODE_ROOT_ITEM_INIT)
1341 struct btrfs_map_token {
1342 const struct extent_buffer *eb;
1344 unsigned long offset;
1347 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1348 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1350 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1351 struct extent_buffer *eb)
1354 token->kaddr = NULL;
1357 /* some macros to generate set/get functions for the struct fields. This
1358 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1361 #define le8_to_cpu(v) (v)
1362 #define cpu_to_le8(v) (v)
1365 #define read_eb_member(eb, ptr, type, member, result) (\
1366 read_extent_buffer(eb, (char *)(result), \
1367 ((unsigned long)(ptr)) + \
1368 offsetof(type, member), \
1369 sizeof(((type *)0)->member)))
1371 #define write_eb_member(eb, ptr, type, member, result) (\
1372 write_extent_buffer(eb, (char *)(result), \
1373 ((unsigned long)(ptr)) + \
1374 offsetof(type, member), \
1375 sizeof(((type *)0)->member)))
1377 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1378 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1379 const void *ptr, unsigned long off, \
1380 struct btrfs_map_token *token); \
1381 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1382 unsigned long off, u##bits val, \
1383 struct btrfs_map_token *token); \
1384 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1385 const void *ptr, unsigned long off); \
1386 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1387 unsigned long off, u##bits val);
1389 DECLARE_BTRFS_SETGET_BITS(8)
1390 DECLARE_BTRFS_SETGET_BITS(16)
1391 DECLARE_BTRFS_SETGET_BITS(32)
1392 DECLARE_BTRFS_SETGET_BITS(64)
1394 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1395 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1398 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1399 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1401 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1404 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1405 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1407 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1409 struct btrfs_map_token *token) \
1411 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1412 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1414 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1415 type *s, u##bits val, \
1416 struct btrfs_map_token *token) \
1418 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1419 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1422 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1423 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1425 const type *p = page_address(eb->pages[0]); \
1426 u##bits res = le##bits##_to_cpu(p->member); \
1429 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1432 type *p = page_address(eb->pages[0]); \
1433 p->member = cpu_to_le##bits(val); \
1436 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1437 static inline u##bits btrfs_##name(const type *s) \
1439 return le##bits##_to_cpu(s->member); \
1441 static inline void btrfs_set_##name(type *s, u##bits val) \
1443 s->member = cpu_to_le##bits(val); \
1447 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1448 struct btrfs_dev_item *s)
1450 BUILD_BUG_ON(sizeof(u64) !=
1451 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1452 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1455 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1456 struct btrfs_dev_item *s,
1459 BUILD_BUG_ON(sizeof(u64) !=
1460 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1461 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1462 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1466 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1467 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1468 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1469 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1470 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1472 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1473 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1474 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1475 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1476 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1477 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1479 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1480 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1482 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1484 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1486 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1488 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1490 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1491 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1493 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1495 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1497 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1500 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1502 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1505 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1507 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1510 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1511 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1512 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1513 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1514 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1515 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1516 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1517 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1518 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1519 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1520 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1522 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1524 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1527 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1528 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1529 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1531 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1533 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1535 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1537 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1538 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1540 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1542 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1543 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1545 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1548 unsigned long offset = (unsigned long)c;
1549 offset += offsetof(struct btrfs_chunk, stripe);
1550 offset += nr * sizeof(struct btrfs_stripe);
1551 return (struct btrfs_stripe *)offset;
1554 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1556 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1559 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1560 struct btrfs_chunk *c, int nr)
1562 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1565 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1566 struct btrfs_chunk *c, int nr)
1568 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1571 /* struct btrfs_block_group_item */
1572 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1574 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1576 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1577 struct btrfs_block_group_item, chunk_objectid, 64);
1579 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1580 struct btrfs_block_group_item, chunk_objectid, 64);
1581 BTRFS_SETGET_FUNCS(block_group_flags,
1582 struct btrfs_block_group_item, flags, 64);
1583 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1584 struct btrfs_block_group_item, flags, 64);
1586 /* struct btrfs_free_space_info */
1587 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1589 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1591 /* struct btrfs_inode_ref */
1592 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1593 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1595 /* struct btrfs_inode_extref */
1596 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1597 parent_objectid, 64);
1598 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1600 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1602 /* struct btrfs_inode_item */
1603 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1604 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1605 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1606 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1607 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1608 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1609 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1610 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1611 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1612 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1613 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1614 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1615 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1617 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1619 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1621 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1627 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1629 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1630 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1631 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1632 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1633 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1634 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1635 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1637 /* struct btrfs_dev_extent */
1638 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1640 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1641 chunk_objectid, 64);
1642 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1644 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1646 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1648 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1649 return (unsigned long)dev + ptr;
1652 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1653 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1655 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1657 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1660 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1662 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1663 struct btrfs_tree_block_info *item,
1664 struct btrfs_disk_key *key)
1666 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1669 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1670 struct btrfs_tree_block_info *item,
1671 struct btrfs_disk_key *key)
1673 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1676 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1678 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1680 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1682 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1685 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1688 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1690 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1693 static inline u32 btrfs_extent_inline_ref_size(int type)
1695 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1696 type == BTRFS_SHARED_BLOCK_REF_KEY)
1697 return sizeof(struct btrfs_extent_inline_ref);
1698 if (type == BTRFS_SHARED_DATA_REF_KEY)
1699 return sizeof(struct btrfs_shared_data_ref) +
1700 sizeof(struct btrfs_extent_inline_ref);
1701 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1702 return sizeof(struct btrfs_extent_data_ref) +
1703 offsetof(struct btrfs_extent_inline_ref, offset);
1707 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1708 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1710 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1711 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1713 /* struct btrfs_node */
1714 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1715 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1716 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1718 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1721 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1724 ptr = offsetof(struct btrfs_node, ptrs) +
1725 sizeof(struct btrfs_key_ptr) * nr;
1726 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1729 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1733 ptr = offsetof(struct btrfs_node, ptrs) +
1734 sizeof(struct btrfs_key_ptr) * nr;
1735 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1738 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1741 ptr = offsetof(struct btrfs_node, ptrs) +
1742 sizeof(struct btrfs_key_ptr) * nr;
1743 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1746 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1750 ptr = offsetof(struct btrfs_node, ptrs) +
1751 sizeof(struct btrfs_key_ptr) * nr;
1752 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1755 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1757 return offsetof(struct btrfs_node, ptrs) +
1758 sizeof(struct btrfs_key_ptr) * nr;
1761 void btrfs_node_key(const struct extent_buffer *eb,
1762 struct btrfs_disk_key *disk_key, int nr);
1764 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1765 struct btrfs_disk_key *disk_key, int nr)
1768 ptr = btrfs_node_key_ptr_offset(nr);
1769 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1770 struct btrfs_key_ptr, key, disk_key);
1773 /* struct btrfs_item */
1774 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1775 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1776 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1777 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1779 static inline unsigned long btrfs_item_nr_offset(int nr)
1781 return offsetof(struct btrfs_leaf, items) +
1782 sizeof(struct btrfs_item) * nr;
1785 static inline struct btrfs_item *btrfs_item_nr(int nr)
1787 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1790 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1791 struct btrfs_item *item)
1793 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1796 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1798 return btrfs_item_end(eb, btrfs_item_nr(nr));
1801 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1803 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1806 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1808 return btrfs_item_size(eb, btrfs_item_nr(nr));
1811 static inline void btrfs_item_key(const struct extent_buffer *eb,
1812 struct btrfs_disk_key *disk_key, int nr)
1814 struct btrfs_item *item = btrfs_item_nr(nr);
1815 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1818 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1819 struct btrfs_disk_key *disk_key, int nr)
1821 struct btrfs_item *item = btrfs_item_nr(nr);
1822 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1825 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1828 * struct btrfs_root_ref
1830 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1831 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1832 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1834 /* struct btrfs_dir_item */
1835 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1836 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1837 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1838 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1839 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1840 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1842 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1844 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1847 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1848 const struct btrfs_dir_item *item,
1849 struct btrfs_disk_key *key)
1851 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1854 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1855 struct btrfs_dir_item *item,
1856 const struct btrfs_disk_key *key)
1858 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1861 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1863 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1865 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1868 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1869 const struct btrfs_free_space_header *h,
1870 struct btrfs_disk_key *key)
1872 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1875 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1876 struct btrfs_free_space_header *h,
1877 const struct btrfs_disk_key *key)
1879 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1882 /* struct btrfs_disk_key */
1883 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1885 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1886 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1888 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1889 const struct btrfs_disk_key *disk)
1891 cpu->offset = le64_to_cpu(disk->offset);
1892 cpu->type = disk->type;
1893 cpu->objectid = le64_to_cpu(disk->objectid);
1896 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1897 const struct btrfs_key *cpu)
1899 disk->offset = cpu_to_le64(cpu->offset);
1900 disk->type = cpu->type;
1901 disk->objectid = cpu_to_le64(cpu->objectid);
1904 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1905 struct btrfs_key *key, int nr)
1907 struct btrfs_disk_key disk_key;
1908 btrfs_node_key(eb, &disk_key, nr);
1909 btrfs_disk_key_to_cpu(key, &disk_key);
1912 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1913 struct btrfs_key *key, int nr)
1915 struct btrfs_disk_key disk_key;
1916 btrfs_item_key(eb, &disk_key, nr);
1917 btrfs_disk_key_to_cpu(key, &disk_key);
1920 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1921 const struct btrfs_dir_item *item,
1922 struct btrfs_key *key)
1924 struct btrfs_disk_key disk_key;
1925 btrfs_dir_item_key(eb, item, &disk_key);
1926 btrfs_disk_key_to_cpu(key, &disk_key);
1929 /* struct btrfs_header */
1930 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1931 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1933 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1934 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1935 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1936 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1937 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1939 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1940 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1942 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1944 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1946 return (btrfs_header_flags(eb) & flag) == flag;
1949 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1951 u64 flags = btrfs_header_flags(eb);
1952 btrfs_set_header_flags(eb, flags | flag);
1955 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1957 u64 flags = btrfs_header_flags(eb);
1958 btrfs_set_header_flags(eb, flags & ~flag);
1961 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1963 u64 flags = btrfs_header_flags(eb);
1964 return flags >> BTRFS_BACKREF_REV_SHIFT;
1967 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1970 u64 flags = btrfs_header_flags(eb);
1971 flags &= ~BTRFS_BACKREF_REV_MASK;
1972 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1973 btrfs_set_header_flags(eb, flags);
1976 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1978 return btrfs_header_level(eb) == 0;
1981 /* struct btrfs_root_item */
1982 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1984 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1985 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1986 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1988 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1990 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1991 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1992 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1993 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1994 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1995 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1996 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1997 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1999 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2001 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2003 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2005 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2007 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2010 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2012 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2015 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2017 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2020 /* struct btrfs_root_backup */
2021 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2023 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2025 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2026 tree_root_level, 8);
2028 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2030 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2031 chunk_root_gen, 64);
2032 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2033 chunk_root_level, 8);
2035 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2037 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2038 extent_root_gen, 64);
2039 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2040 extent_root_level, 8);
2042 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2044 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2046 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2049 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2051 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2053 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2056 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2058 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2060 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2061 csum_root_level, 8);
2062 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2064 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2066 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2069 /* struct btrfs_balance_item */
2070 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2072 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2073 const struct btrfs_balance_item *bi,
2074 struct btrfs_disk_balance_args *ba)
2076 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2079 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2080 struct btrfs_balance_item *bi,
2081 const struct btrfs_disk_balance_args *ba)
2083 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2086 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2087 const struct btrfs_balance_item *bi,
2088 struct btrfs_disk_balance_args *ba)
2090 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2093 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2094 struct btrfs_balance_item *bi,
2095 const struct btrfs_disk_balance_args *ba)
2097 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2100 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2101 const struct btrfs_balance_item *bi,
2102 struct btrfs_disk_balance_args *ba)
2104 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2107 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2108 struct btrfs_balance_item *bi,
2109 const struct btrfs_disk_balance_args *ba)
2111 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2115 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2116 const struct btrfs_disk_balance_args *disk)
2118 memset(cpu, 0, sizeof(*cpu));
2120 cpu->profiles = le64_to_cpu(disk->profiles);
2121 cpu->usage = le64_to_cpu(disk->usage);
2122 cpu->devid = le64_to_cpu(disk->devid);
2123 cpu->pstart = le64_to_cpu(disk->pstart);
2124 cpu->pend = le64_to_cpu(disk->pend);
2125 cpu->vstart = le64_to_cpu(disk->vstart);
2126 cpu->vend = le64_to_cpu(disk->vend);
2127 cpu->target = le64_to_cpu(disk->target);
2128 cpu->flags = le64_to_cpu(disk->flags);
2129 cpu->limit = le64_to_cpu(disk->limit);
2130 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2131 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2135 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2136 const struct btrfs_balance_args *cpu)
2138 memset(disk, 0, sizeof(*disk));
2140 disk->profiles = cpu_to_le64(cpu->profiles);
2141 disk->usage = cpu_to_le64(cpu->usage);
2142 disk->devid = cpu_to_le64(cpu->devid);
2143 disk->pstart = cpu_to_le64(cpu->pstart);
2144 disk->pend = cpu_to_le64(cpu->pend);
2145 disk->vstart = cpu_to_le64(cpu->vstart);
2146 disk->vend = cpu_to_le64(cpu->vend);
2147 disk->target = cpu_to_le64(cpu->target);
2148 disk->flags = cpu_to_le64(cpu->flags);
2149 disk->limit = cpu_to_le64(cpu->limit);
2150 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2151 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2154 /* struct btrfs_super_block */
2155 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2156 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2157 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2159 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2160 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2161 struct btrfs_super_block, sys_chunk_array_size, 32);
2162 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2163 struct btrfs_super_block, chunk_root_generation, 64);
2164 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2166 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2168 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2169 chunk_root_level, 8);
2170 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2172 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2173 log_root_transid, 64);
2174 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2176 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2178 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2180 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2182 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2184 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2186 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2187 root_dir_objectid, 64);
2188 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2190 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2192 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2193 compat_ro_flags, 64);
2194 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2195 incompat_flags, 64);
2196 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2198 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2199 cache_generation, 64);
2200 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2201 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2202 uuid_tree_generation, 64);
2204 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2205 const char *btrfs_super_csum_name(u16 csum_type);
2206 const char *btrfs_super_csum_driver(u16 csum_type);
2207 size_t __const btrfs_get_num_csums(void);
2211 * The leaf data grows from end-to-front in the node.
2212 * this returns the address of the start of the last item,
2213 * which is the stop of the leaf data stack
2215 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2217 u32 nr = btrfs_header_nritems(leaf);
2220 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2221 return btrfs_item_offset_nr(leaf, nr - 1);
2224 /* struct btrfs_file_extent_item */
2225 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2226 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2227 struct btrfs_file_extent_item, disk_bytenr, 64);
2228 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2229 struct btrfs_file_extent_item, offset, 64);
2230 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2231 struct btrfs_file_extent_item, generation, 64);
2232 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2233 struct btrfs_file_extent_item, num_bytes, 64);
2234 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2235 struct btrfs_file_extent_item, disk_num_bytes, 64);
2236 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2237 struct btrfs_file_extent_item, compression, 8);
2239 static inline unsigned long
2240 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2242 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2245 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2247 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2250 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2252 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2254 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2255 disk_num_bytes, 64);
2256 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2258 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2260 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2262 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2264 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2266 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2267 other_encoding, 16);
2270 * this returns the number of bytes used by the item on disk, minus the
2271 * size of any extent headers. If a file is compressed on disk, this is
2272 * the compressed size
2274 static inline u32 btrfs_file_extent_inline_item_len(
2275 const struct extent_buffer *eb,
2276 struct btrfs_item *e)
2278 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2281 /* btrfs_qgroup_status_item */
2282 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2284 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2286 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2288 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2291 /* btrfs_qgroup_info_item */
2292 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2294 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2295 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2297 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2298 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2301 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2302 struct btrfs_qgroup_info_item, generation, 64);
2303 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2305 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2306 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2309 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2310 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2312 /* btrfs_qgroup_limit_item */
2313 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2315 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2317 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2319 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2321 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2324 /* btrfs_dev_replace_item */
2325 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2326 struct btrfs_dev_replace_item, src_devid, 64);
2327 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2328 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2330 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2332 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2334 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2336 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2337 num_write_errors, 64);
2338 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2339 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2341 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2343 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2346 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2347 struct btrfs_dev_replace_item, src_devid, 64);
2348 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2349 struct btrfs_dev_replace_item,
2350 cont_reading_from_srcdev_mode, 64);
2351 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2352 struct btrfs_dev_replace_item, replace_state, 64);
2353 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2354 struct btrfs_dev_replace_item, time_started, 64);
2355 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2356 struct btrfs_dev_replace_item, time_stopped, 64);
2357 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2358 struct btrfs_dev_replace_item, num_write_errors, 64);
2359 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2360 struct btrfs_dev_replace_item,
2361 num_uncorrectable_read_errors, 64);
2362 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2363 struct btrfs_dev_replace_item, cursor_left, 64);
2364 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2365 struct btrfs_dev_replace_item, cursor_right, 64);
2367 /* helper function to cast into the data area of the leaf. */
2368 #define btrfs_item_ptr(leaf, slot, type) \
2369 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2370 btrfs_item_offset_nr(leaf, slot)))
2372 #define btrfs_item_ptr_offset(leaf, slot) \
2373 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2374 btrfs_item_offset_nr(leaf, slot)))
2376 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2378 return crc32c(crc, address, length);
2381 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2383 put_unaligned_le32(~crc, result);
2386 static inline u64 btrfs_name_hash(const char *name, int len)
2388 return crc32c((u32)~1, name, len);
2392 * Figure the key offset of an extended inode ref
2394 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2397 return (u64) crc32c(parent_objectid, name, len);
2400 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2402 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2407 enum btrfs_inline_ref_type {
2408 BTRFS_REF_TYPE_INVALID,
2409 BTRFS_REF_TYPE_BLOCK,
2410 BTRFS_REF_TYPE_DATA,
2414 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2415 struct btrfs_extent_inline_ref *iref,
2416 enum btrfs_inline_ref_type is_data);
2417 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2419 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2422 * Use this if we would be adding new items, as we could split nodes as we cow
2425 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2428 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2432 * Doing a truncate or a modification won't result in new nodes or leaves, just
2433 * what we need for COW.
2435 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2438 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2441 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2442 u64 start, u64 num_bytes);
2443 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2444 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2445 unsigned long count);
2446 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2447 struct btrfs_delayed_ref_root *delayed_refs,
2448 struct btrfs_delayed_ref_head *head);
2449 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2450 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2451 struct btrfs_fs_info *fs_info, u64 bytenr,
2452 u64 offset, int metadata, u64 *refs, u64 *flags);
2453 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2455 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2456 u64 bytenr, u64 num_bytes);
2457 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2458 int btrfs_cross_ref_exist(struct btrfs_root *root,
2459 u64 objectid, u64 offset, u64 bytenr);
2460 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2461 struct btrfs_root *root,
2462 u64 parent, u64 root_objectid,
2463 const struct btrfs_disk_key *key,
2464 int level, u64 hint,
2466 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2467 struct btrfs_root *root,
2468 struct extent_buffer *buf,
2469 u64 parent, int last_ref);
2470 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root, u64 owner,
2472 u64 offset, u64 ram_bytes,
2473 struct btrfs_key *ins);
2474 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2475 u64 root_objectid, u64 owner, u64 offset,
2476 struct btrfs_key *ins);
2477 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2478 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2479 struct btrfs_key *ins, int is_data, int delalloc);
2480 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2481 struct extent_buffer *buf, int full_backref);
2482 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2483 struct extent_buffer *buf, int full_backref);
2484 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2485 struct extent_buffer *eb, u64 flags,
2486 int level, int is_data);
2487 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2489 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2490 u64 start, u64 len, int delalloc);
2491 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2493 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2494 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2495 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2496 struct btrfs_ref *generic_ref);
2498 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2499 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache);
2500 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache);
2501 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2503 enum btrfs_reserve_flush_enum {
2504 /* If we are in the transaction, we can't flush anything.*/
2505 BTRFS_RESERVE_NO_FLUSH,
2507 * Flushing delalloc may cause deadlock somewhere, in this
2508 * case, use FLUSH LIMIT
2510 BTRFS_RESERVE_FLUSH_LIMIT,
2511 BTRFS_RESERVE_FLUSH_EVICT,
2512 BTRFS_RESERVE_FLUSH_ALL,
2515 enum btrfs_flush_state {
2516 FLUSH_DELAYED_ITEMS_NR = 1,
2517 FLUSH_DELAYED_ITEMS = 2,
2518 FLUSH_DELAYED_REFS_NR = 3,
2519 FLUSH_DELAYED_REFS = 4,
2521 FLUSH_DELALLOC_WAIT = 6,
2523 ALLOC_CHUNK_FORCE = 8,
2524 RUN_DELAYED_IPUTS = 9,
2528 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2529 struct btrfs_block_rsv *rsv,
2530 int nitems, bool use_global_rsv);
2531 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2532 struct btrfs_block_rsv *rsv);
2533 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2535 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2536 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2537 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2538 u64 start, u64 end);
2539 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2540 u64 num_bytes, u64 *actual_bytes);
2541 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2543 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2544 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2545 struct btrfs_fs_info *fs_info);
2546 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2547 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2548 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2551 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2552 int level, int *slot);
2553 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2554 int btrfs_previous_item(struct btrfs_root *root,
2555 struct btrfs_path *path, u64 min_objectid,
2557 int btrfs_previous_extent_item(struct btrfs_root *root,
2558 struct btrfs_path *path, u64 min_objectid);
2559 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2560 struct btrfs_path *path,
2561 const struct btrfs_key *new_key);
2562 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2563 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2564 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2565 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2566 struct btrfs_key *key, int lowest_level,
2568 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2569 struct btrfs_path *path,
2571 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2574 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2575 struct btrfs_root *root, struct extent_buffer *buf,
2576 struct extent_buffer *parent, int parent_slot,
2577 struct extent_buffer **cow_ret);
2578 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2579 struct btrfs_root *root,
2580 struct extent_buffer *buf,
2581 struct extent_buffer **cow_ret, u64 new_root_objectid);
2582 int btrfs_block_can_be_shared(struct btrfs_root *root,
2583 struct extent_buffer *buf);
2584 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2585 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2586 int btrfs_split_item(struct btrfs_trans_handle *trans,
2587 struct btrfs_root *root,
2588 struct btrfs_path *path,
2589 const struct btrfs_key *new_key,
2590 unsigned long split_offset);
2591 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2592 struct btrfs_root *root,
2593 struct btrfs_path *path,
2594 const struct btrfs_key *new_key);
2595 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2596 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2597 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2598 const struct btrfs_key *key, struct btrfs_path *p,
2599 int ins_len, int cow);
2600 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2601 struct btrfs_path *p, u64 time_seq);
2602 int btrfs_search_slot_for_read(struct btrfs_root *root,
2603 const struct btrfs_key *key,
2604 struct btrfs_path *p, int find_higher,
2606 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2607 struct btrfs_root *root, struct extent_buffer *parent,
2608 int start_slot, u64 *last_ret,
2609 struct btrfs_key *progress);
2610 void btrfs_release_path(struct btrfs_path *p);
2611 struct btrfs_path *btrfs_alloc_path(void);
2612 void btrfs_free_path(struct btrfs_path *p);
2614 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2615 struct btrfs_path *path, int slot, int nr);
2616 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2617 struct btrfs_root *root,
2618 struct btrfs_path *path)
2620 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2623 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2624 const struct btrfs_key *cpu_key, u32 *data_size,
2625 u32 total_data, u32 total_size, int nr);
2626 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2627 const struct btrfs_key *key, void *data, u32 data_size);
2628 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2629 struct btrfs_root *root,
2630 struct btrfs_path *path,
2631 const struct btrfs_key *cpu_key, u32 *data_size,
2634 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2635 struct btrfs_root *root,
2636 struct btrfs_path *path,
2637 const struct btrfs_key *key,
2640 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2643 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2644 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2645 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2647 static inline int btrfs_next_old_item(struct btrfs_root *root,
2648 struct btrfs_path *p, u64 time_seq)
2651 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2652 return btrfs_next_old_leaf(root, p, time_seq);
2655 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2657 return btrfs_next_old_item(root, p, 0);
2659 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2660 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2662 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2663 struct btrfs_root *root,
2664 struct extent_buffer *node,
2665 struct extent_buffer *parent);
2666 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2669 * Do it this way so we only ever do one test_bit in the normal case.
2671 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2672 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2680 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2681 * anything except sleeping. This function is used to check the status of
2684 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2686 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2689 /* tree mod log functions from ctree.c */
2690 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2691 struct seq_list *elem);
2692 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2693 struct seq_list *elem);
2694 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2697 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2698 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2700 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2701 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2703 int btrfs_del_root(struct btrfs_trans_handle *trans,
2704 const struct btrfs_key *key);
2705 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2706 const struct btrfs_key *key,
2707 struct btrfs_root_item *item);
2708 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2709 struct btrfs_root *root,
2710 struct btrfs_key *key,
2711 struct btrfs_root_item *item);
2712 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2713 struct btrfs_path *path, struct btrfs_root_item *root_item,
2714 struct btrfs_key *root_key);
2715 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2716 void btrfs_set_root_node(struct btrfs_root_item *item,
2717 struct extent_buffer *node);
2718 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2719 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2720 struct btrfs_root *root);
2723 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2725 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2727 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2730 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2731 const char *name, int name_len);
2732 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2733 int name_len, struct btrfs_inode *dir,
2734 struct btrfs_key *location, u8 type, u64 index);
2735 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2736 struct btrfs_root *root,
2737 struct btrfs_path *path, u64 dir,
2738 const char *name, int name_len,
2740 struct btrfs_dir_item *
2741 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root,
2743 struct btrfs_path *path, u64 dir,
2744 u64 objectid, const char *name, int name_len,
2746 struct btrfs_dir_item *
2747 btrfs_search_dir_index_item(struct btrfs_root *root,
2748 struct btrfs_path *path, u64 dirid,
2749 const char *name, int name_len);
2750 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2751 struct btrfs_root *root,
2752 struct btrfs_path *path,
2753 struct btrfs_dir_item *di);
2754 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2755 struct btrfs_root *root,
2756 struct btrfs_path *path, u64 objectid,
2757 const char *name, u16 name_len,
2758 const void *data, u16 data_len);
2759 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2760 struct btrfs_root *root,
2761 struct btrfs_path *path, u64 dir,
2762 const char *name, u16 name_len,
2764 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2765 struct btrfs_path *path,
2770 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2771 struct btrfs_root *root, u64 offset);
2772 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2773 struct btrfs_root *root, u64 offset);
2774 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2777 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2778 struct btrfs_root *root,
2779 const char *name, int name_len,
2780 u64 inode_objectid, u64 ref_objectid, u64 index);
2781 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2782 struct btrfs_root *root,
2783 const char *name, int name_len,
2784 u64 inode_objectid, u64 ref_objectid, u64 *index);
2785 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2786 struct btrfs_root *root,
2787 struct btrfs_path *path, u64 objectid);
2788 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2789 *root, struct btrfs_path *path,
2790 struct btrfs_key *location, int mod);
2792 struct btrfs_inode_extref *
2793 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2794 struct btrfs_root *root,
2795 struct btrfs_path *path,
2796 const char *name, int name_len,
2797 u64 inode_objectid, u64 ref_objectid, int ins_len,
2800 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2801 int slot, const char *name,
2803 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2804 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2805 const char *name, int name_len);
2807 struct btrfs_dio_private;
2808 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2809 struct btrfs_root *root, u64 bytenr, u64 len);
2810 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2811 u64 offset, u8 *dst);
2812 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2813 struct btrfs_root *root,
2814 u64 objectid, u64 pos,
2815 u64 disk_offset, u64 disk_num_bytes,
2816 u64 num_bytes, u64 offset, u64 ram_bytes,
2817 u8 compression, u8 encryption, u16 other_encoding);
2818 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2819 struct btrfs_root *root,
2820 struct btrfs_path *path, u64 objectid,
2821 u64 bytenr, int mod);
2822 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2823 struct btrfs_root *root,
2824 struct btrfs_ordered_sum *sums);
2825 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2826 u64 file_start, int contig);
2827 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2828 struct list_head *list, int search_commit);
2829 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2830 const struct btrfs_path *path,
2831 struct btrfs_file_extent_item *fi,
2832 const bool new_inline,
2833 struct extent_map *em);
2834 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
2836 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
2838 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size);
2841 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2842 u64 start, u64 len);
2843 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2844 u64 *orig_start, u64 *orig_block_len,
2847 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2848 struct btrfs_inode *inode);
2849 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2850 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2851 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2852 struct btrfs_root *root,
2853 struct btrfs_inode *dir, struct btrfs_inode *inode,
2854 const char *name, int name_len);
2855 int btrfs_add_link(struct btrfs_trans_handle *trans,
2856 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2857 const char *name, int name_len, int add_backref, u64 index);
2858 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2859 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2861 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2862 struct btrfs_root *root,
2863 struct inode *inode, u64 new_size,
2866 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2867 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2868 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2869 unsigned int extra_bits,
2870 struct extent_state **cached_state);
2871 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2872 struct btrfs_root *new_root,
2873 struct btrfs_root *parent_root,
2875 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2877 void btrfs_clear_delalloc_extent(struct inode *inode,
2878 struct extent_state *state, unsigned *bits);
2879 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2880 struct extent_state *other);
2881 void btrfs_split_delalloc_extent(struct inode *inode,
2882 struct extent_state *orig, u64 split);
2883 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2884 unsigned long bio_flags);
2885 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2886 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2887 int btrfs_readpage(struct file *file, struct page *page);
2888 void btrfs_evict_inode(struct inode *inode);
2889 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2890 struct inode *btrfs_alloc_inode(struct super_block *sb);
2891 void btrfs_destroy_inode(struct inode *inode);
2892 void btrfs_free_inode(struct inode *inode);
2893 int btrfs_drop_inode(struct inode *inode);
2894 int __init btrfs_init_cachep(void);
2895 void __cold btrfs_destroy_cachep(void);
2896 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2897 struct btrfs_root *root, struct btrfs_path *path);
2898 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2899 struct btrfs_root *root);
2900 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2901 struct page *page, size_t pg_offset,
2902 u64 start, u64 end);
2903 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2904 struct btrfs_root *root,
2905 struct inode *inode);
2906 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2907 struct btrfs_root *root, struct inode *inode);
2908 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2909 struct btrfs_inode *inode);
2910 int btrfs_orphan_cleanup(struct btrfs_root *root);
2911 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2912 void btrfs_add_delayed_iput(struct inode *inode);
2913 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2914 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2915 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2916 u64 start, u64 num_bytes, u64 min_size,
2917 loff_t actual_len, u64 *alloc_hint);
2918 int btrfs_prealloc_file_range_trans(struct inode *inode,
2919 struct btrfs_trans_handle *trans, int mode,
2920 u64 start, u64 num_bytes, u64 min_size,
2921 loff_t actual_len, u64 *alloc_hint);
2922 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2923 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2924 struct writeback_control *wbc);
2925 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2926 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2927 u64 end, int uptodate);
2928 extern const struct dentry_operations btrfs_dentry_operations;
2931 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2932 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2933 int btrfs_ioctl_get_supported_features(void __user *arg);
2934 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2935 int __pure btrfs_is_empty_uuid(u8 *uuid);
2936 int btrfs_defrag_file(struct inode *inode, struct file *file,
2937 struct btrfs_ioctl_defrag_range_args *range,
2938 u64 newer_than, unsigned long max_pages);
2939 void btrfs_get_block_group_info(struct list_head *groups_list,
2940 struct btrfs_ioctl_space_info *space);
2941 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2942 struct btrfs_ioctl_balance_args *bargs);
2945 int __init btrfs_auto_defrag_init(void);
2946 void __cold btrfs_auto_defrag_exit(void);
2947 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2948 struct btrfs_inode *inode);
2949 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2950 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2951 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2952 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2954 extern const struct file_operations btrfs_file_operations;
2955 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2956 struct btrfs_root *root, struct inode *inode,
2957 struct btrfs_path *path, u64 start, u64 end,
2958 u64 *drop_end, int drop_cache,
2960 u32 extent_item_size,
2962 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2963 struct btrfs_root *root, struct inode *inode, u64 start,
2964 u64 end, int drop_cache);
2965 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2966 const u64 start, const u64 end,
2967 struct btrfs_clone_extent_info *clone_info,
2968 struct btrfs_trans_handle **trans_out);
2969 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2970 struct btrfs_inode *inode, u64 start, u64 end);
2971 int btrfs_release_file(struct inode *inode, struct file *file);
2972 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2973 size_t num_pages, loff_t pos, size_t write_bytes,
2974 struct extent_state **cached);
2975 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2978 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2979 struct btrfs_root *root);
2982 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
2983 unsigned long new_flags);
2984 int btrfs_sync_fs(struct super_block *sb, int wait);
2985 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
2986 u64 subvol_objectid);
2988 static inline __printf(2, 3) __cold
2989 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
2993 #ifdef CONFIG_PRINTK
2996 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
2998 #define btrfs_printk(fs_info, fmt, args...) \
2999 btrfs_no_printk(fs_info, fmt, ##args)
3002 #define btrfs_emerg(fs_info, fmt, args...) \
3003 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3004 #define btrfs_alert(fs_info, fmt, args...) \
3005 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3006 #define btrfs_crit(fs_info, fmt, args...) \
3007 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3008 #define btrfs_err(fs_info, fmt, args...) \
3009 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3010 #define btrfs_warn(fs_info, fmt, args...) \
3011 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3012 #define btrfs_notice(fs_info, fmt, args...) \
3013 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3014 #define btrfs_info(fs_info, fmt, args...) \
3015 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3018 * Wrappers that use printk_in_rcu
3020 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3021 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3022 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3023 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3024 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3025 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3026 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3027 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3028 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3029 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3030 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3031 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3032 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3033 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3036 * Wrappers that use a ratelimited printk_in_rcu
3038 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3039 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3040 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3041 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3042 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3043 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3044 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3045 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3046 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3047 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3048 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3049 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3050 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3051 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3054 * Wrappers that use a ratelimited printk
3056 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3057 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3058 #define btrfs_alert_rl(fs_info, fmt, args...) \
3059 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3060 #define btrfs_crit_rl(fs_info, fmt, args...) \
3061 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3062 #define btrfs_err_rl(fs_info, fmt, args...) \
3063 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3064 #define btrfs_warn_rl(fs_info, fmt, args...) \
3065 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3066 #define btrfs_notice_rl(fs_info, fmt, args...) \
3067 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3068 #define btrfs_info_rl(fs_info, fmt, args...) \
3069 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3071 #if defined(CONFIG_DYNAMIC_DEBUG)
3072 #define btrfs_debug(fs_info, fmt, args...) \
3073 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3074 fs_info, KERN_DEBUG fmt, ##args)
3075 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3076 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3077 fs_info, KERN_DEBUG fmt, ##args)
3078 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3079 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3080 fs_info, KERN_DEBUG fmt, ##args)
3081 #define btrfs_debug_rl(fs_info, fmt, args...) \
3082 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3083 fs_info, KERN_DEBUG fmt, ##args)
3084 #elif defined(DEBUG)
3085 #define btrfs_debug(fs_info, fmt, args...) \
3086 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3087 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3088 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3089 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3090 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3091 #define btrfs_debug_rl(fs_info, fmt, args...) \
3092 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3094 #define btrfs_debug(fs_info, fmt, args...) \
3095 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3096 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3097 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3098 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3099 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3100 #define btrfs_debug_rl(fs_info, fmt, args...) \
3101 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3104 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3107 btrfs_printk(fs_info, fmt, ##args); \
3108 rcu_read_unlock(); \
3111 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3114 btrfs_no_printk(fs_info, fmt, ##args); \
3115 rcu_read_unlock(); \
3118 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3120 static DEFINE_RATELIMIT_STATE(_rs, \
3121 DEFAULT_RATELIMIT_INTERVAL, \
3122 DEFAULT_RATELIMIT_BURST); \
3123 if (__ratelimit(&_rs)) \
3124 btrfs_printk(fs_info, fmt, ##args); \
3127 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3130 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3131 rcu_read_unlock(); \
3134 #ifdef CONFIG_BTRFS_ASSERT
3136 static inline void assertfail(const char *expr, const char *file, int line)
3138 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3142 #define ASSERT(expr) \
3143 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3146 static inline void assertfail(const char *expr, const char* file, int line) { }
3147 #define ASSERT(expr) (void)(expr)
3151 * Use that for functions that are conditionally exported for sanity tests but
3154 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3155 #define EXPORT_FOR_TESTS static
3157 #define EXPORT_FOR_TESTS
3161 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3164 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3169 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3170 unsigned int line, int errno, const char *fmt, ...);
3172 const char * __attribute_const__ btrfs_decode_error(int errno);
3175 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3176 const char *function,
3177 unsigned int line, int errno);
3180 * Call btrfs_abort_transaction as early as possible when an error condition is
3181 * detected, that way the exact line number is reported.
3183 #define btrfs_abort_transaction(trans, errno) \
3185 /* Report first abort since mount */ \
3186 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3187 &((trans)->fs_info->fs_state))) { \
3188 if ((errno) != -EIO) { \
3189 WARN(1, KERN_DEBUG \
3190 "BTRFS: Transaction aborted (error %d)\n", \
3193 btrfs_debug((trans)->fs_info, \
3194 "Transaction aborted (error %d)", \
3198 __btrfs_abort_transaction((trans), __func__, \
3199 __LINE__, (errno)); \
3202 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3204 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3205 (errno), fmt, ##args); \
3210 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3211 unsigned int line, int errno, const char *fmt, ...);
3213 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3214 * will panic(). Otherwise we BUG() here.
3216 #define btrfs_panic(fs_info, errno, fmt, args...) \
3218 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3223 /* compatibility and incompatibility defines */
3225 #define btrfs_set_fs_incompat(__fs_info, opt) \
3226 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3229 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3230 u64 flag, const char* name)
3232 struct btrfs_super_block *disk_super;
3235 disk_super = fs_info->super_copy;
3236 features = btrfs_super_incompat_flags(disk_super);
3237 if (!(features & flag)) {
3238 spin_lock(&fs_info->super_lock);
3239 features = btrfs_super_incompat_flags(disk_super);
3240 if (!(features & flag)) {
3242 btrfs_set_super_incompat_flags(disk_super, features);
3244 "setting incompat feature flag for %s (0x%llx)",
3247 spin_unlock(&fs_info->super_lock);
3251 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3252 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3255 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3256 u64 flag, const char* name)
3258 struct btrfs_super_block *disk_super;
3261 disk_super = fs_info->super_copy;
3262 features = btrfs_super_incompat_flags(disk_super);
3263 if (features & flag) {
3264 spin_lock(&fs_info->super_lock);
3265 features = btrfs_super_incompat_flags(disk_super);
3266 if (features & flag) {
3268 btrfs_set_super_incompat_flags(disk_super, features);
3270 "clearing incompat feature flag for %s (0x%llx)",
3273 spin_unlock(&fs_info->super_lock);
3277 #define btrfs_fs_incompat(fs_info, opt) \
3278 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3280 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3282 struct btrfs_super_block *disk_super;
3283 disk_super = fs_info->super_copy;
3284 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3287 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3288 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3291 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3292 u64 flag, const char *name)
3294 struct btrfs_super_block *disk_super;
3297 disk_super = fs_info->super_copy;
3298 features = btrfs_super_compat_ro_flags(disk_super);
3299 if (!(features & flag)) {
3300 spin_lock(&fs_info->super_lock);
3301 features = btrfs_super_compat_ro_flags(disk_super);
3302 if (!(features & flag)) {
3304 btrfs_set_super_compat_ro_flags(disk_super, features);
3306 "setting compat-ro feature flag for %s (0x%llx)",
3309 spin_unlock(&fs_info->super_lock);
3313 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3314 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3317 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3318 u64 flag, const char *name)
3320 struct btrfs_super_block *disk_super;
3323 disk_super = fs_info->super_copy;
3324 features = btrfs_super_compat_ro_flags(disk_super);
3325 if (features & flag) {
3326 spin_lock(&fs_info->super_lock);
3327 features = btrfs_super_compat_ro_flags(disk_super);
3328 if (features & flag) {
3330 btrfs_set_super_compat_ro_flags(disk_super, features);
3332 "clearing compat-ro feature flag for %s (0x%llx)",
3335 spin_unlock(&fs_info->super_lock);
3339 #define btrfs_fs_compat_ro(fs_info, opt) \
3340 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3342 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3344 struct btrfs_super_block *disk_super;
3345 disk_super = fs_info->super_copy;
3346 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3350 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3351 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3352 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3353 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3354 struct inode *inode, struct inode *dir);
3356 #define btrfs_get_acl NULL
3357 #define btrfs_set_acl NULL
3358 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3359 struct inode *inode, struct inode *dir)
3366 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3367 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3368 struct btrfs_root *root);
3369 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3370 struct btrfs_root *root);
3371 int btrfs_recover_relocation(struct btrfs_root *root);
3372 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3373 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3374 struct btrfs_root *root, struct extent_buffer *buf,
3375 struct extent_buffer *cow);
3376 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3377 u64 *bytes_to_reserve);
3378 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3379 struct btrfs_pending_snapshot *pending);
3380 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3383 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3384 u64 end, struct btrfs_scrub_progress *progress,
3385 int readonly, int is_dev_replace);
3386 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3387 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3388 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3389 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3390 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3391 struct btrfs_scrub_progress *progress);
3392 static inline void btrfs_init_full_stripe_locks_tree(
3393 struct btrfs_full_stripe_locks_tree *locks_root)
3395 locks_root->root = RB_ROOT;
3396 mutex_init(&locks_root->lock);
3400 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3401 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3402 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3404 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3406 btrfs_bio_counter_sub(fs_info, 1);
3410 struct reada_control {
3411 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3412 struct btrfs_key key_start;
3413 struct btrfs_key key_end; /* exclusive */
3416 wait_queue_head_t wait;
3418 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3419 struct btrfs_key *start, struct btrfs_key *end);
3420 int btrfs_reada_wait(void *handle);
3421 void btrfs_reada_detach(void *handle);
3422 int btree_readahead_hook(struct extent_buffer *eb, int err);
3424 static inline int is_fstree(u64 rootid)
3426 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3427 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3428 !btrfs_qgroup_level(rootid)))
3433 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3435 return signal_pending(current);
3438 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3440 /* Sanity test specific functions */
3441 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3442 void btrfs_test_inode_set_ops(struct inode *inode);
3443 void btrfs_test_destroy_inode(struct inode *inode);
3445 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3447 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3450 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)