1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
37 struct btrfs_trans_handle;
38 struct btrfs_transaction;
39 struct btrfs_pending_snapshot;
40 struct btrfs_delayed_ref_root;
41 struct btrfs_space_info;
42 struct btrfs_block_group;
43 extern struct kmem_cache *btrfs_trans_handle_cachep;
44 extern struct kmem_cache *btrfs_bit_radix_cachep;
45 extern struct kmem_cache *btrfs_path_cachep;
46 extern struct kmem_cache *btrfs_free_space_cachep;
47 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
48 struct btrfs_ordered_sum;
51 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
54 * Maximum number of mirrors that can be available for all profiles counting
55 * the target device of dev-replace as one. During an active device replace
56 * procedure, the target device of the copy operation is a mirror for the
57 * filesystem data as well that can be used to read data in order to repair
58 * read errors on other disks.
60 * Current value is derived from RAID1C4 with 4 copies.
62 #define BTRFS_MAX_MIRRORS (4 + 1)
64 #define BTRFS_MAX_LEVEL 8
66 #define BTRFS_OLDEST_GENERATION 0ULL
69 * the max metadata block size. This limit is somewhat artificial,
70 * but the memmove costs go through the roof for larger blocks.
72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
75 * we can actually store much bigger names, but lets not confuse the rest
78 #define BTRFS_NAME_LEN 255
81 * Theoretical limit is larger, but we keep this down to a sane
82 * value. That should limit greatly the possibility of collisions on
85 #define BTRFS_LINK_MAX 65535U
87 #define BTRFS_EMPTY_DIR_SIZE 0
89 /* ioprio of readahead is set to idle */
90 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
92 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
95 * Use large batch size to reduce overhead of metadata updates. On the reader
96 * side, we only read it when we are close to ENOSPC and the read overhead is
97 * mostly related to the number of CPUs, so it is OK to use arbitrary large
100 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
105 * Deltas are an effective way to populate global statistics. Give macro names
106 * to make it clear what we're doing. An example is discard_extents in
107 * btrfs_free_space_ctl.
109 #define BTRFS_STAT_NR_ENTRIES 2
110 #define BTRFS_STAT_CURR 0
111 #define BTRFS_STAT_PREV 1
114 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
116 static inline u32 count_max_extents(u64 size)
118 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
121 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
123 BUG_ON(num_stripes == 0);
124 return sizeof(struct btrfs_chunk) +
125 sizeof(struct btrfs_stripe) * (num_stripes - 1);
129 * Runtime (in-memory) states of filesystem
132 /* Global indicator of serious filesystem errors */
133 BTRFS_FS_STATE_ERROR,
135 * Filesystem is being remounted, allow to skip some operations, like
138 BTRFS_FS_STATE_REMOUNTING,
139 /* Track if a transaction abort has been reported on this filesystem */
140 BTRFS_FS_STATE_TRANS_ABORTED,
142 * Bio operations should be blocked on this filesystem because a source
143 * or target device is being destroyed as part of a device replace
145 BTRFS_FS_STATE_DEV_REPLACING,
146 /* The btrfs_fs_info created for self-tests */
147 BTRFS_FS_STATE_DUMMY_FS_INFO,
150 #define BTRFS_BACKREF_REV_MAX 256
151 #define BTRFS_BACKREF_REV_SHIFT 56
152 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
153 BTRFS_BACKREF_REV_SHIFT)
155 #define BTRFS_OLD_BACKREF_REV 0
156 #define BTRFS_MIXED_BACKREF_REV 1
159 * every tree block (leaf or node) starts with this header.
161 struct btrfs_header {
162 /* these first four must match the super block */
163 u8 csum[BTRFS_CSUM_SIZE];
164 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
165 __le64 bytenr; /* which block this node is supposed to live in */
168 /* allowed to be different from the super from here on down */
169 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
174 } __attribute__ ((__packed__));
177 * this is a very generous portion of the super block, giving us
178 * room to translate 14 chunks with 3 stripes each.
180 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
183 * just in case we somehow lose the roots and are not able to mount,
184 * we store an array of the roots from previous transactions
187 #define BTRFS_NUM_BACKUP_ROOTS 4
188 struct btrfs_root_backup {
190 __le64 tree_root_gen;
193 __le64 chunk_root_gen;
196 __le64 extent_root_gen;
205 __le64 csum_root_gen;
215 u8 extent_root_level;
219 /* future and to align */
221 } __attribute__ ((__packed__));
224 * the super block basically lists the main trees of the FS
225 * it currently lacks any block count etc etc
227 struct btrfs_super_block {
228 /* the first 4 fields must match struct btrfs_header */
229 u8 csum[BTRFS_CSUM_SIZE];
230 /* FS specific UUID, visible to user */
231 u8 fsid[BTRFS_FSID_SIZE];
232 __le64 bytenr; /* this block number */
235 /* allowed to be different from the btrfs_header from here own down */
242 /* this will help find the new super based on the log root */
243 __le64 log_root_transid;
246 __le64 root_dir_objectid;
250 __le32 __unused_leafsize;
252 __le32 sys_chunk_array_size;
253 __le64 chunk_root_generation;
255 __le64 compat_ro_flags;
256 __le64 incompat_flags;
261 struct btrfs_dev_item dev_item;
263 char label[BTRFS_LABEL_SIZE];
265 __le64 cache_generation;
266 __le64 uuid_tree_generation;
268 /* the UUID written into btree blocks */
269 u8 metadata_uuid[BTRFS_FSID_SIZE];
271 /* future expansion */
273 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
274 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
275 } __attribute__ ((__packed__));
278 * Compat flags that we support. If any incompat flags are set other than the
279 * ones specified below then we will fail to mount
281 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
282 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
283 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
285 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
286 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
287 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
289 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
292 #define BTRFS_FEATURE_INCOMPAT_SUPP \
293 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
294 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
295 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
296 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
297 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
298 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
299 BTRFS_FEATURE_INCOMPAT_RAID56 | \
300 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
301 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
302 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
303 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
304 BTRFS_FEATURE_INCOMPAT_RAID1C34)
306 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
307 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
308 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
311 * A leaf is full of items. offset and size tell us where to find
312 * the item in the leaf (relative to the start of the data area)
315 struct btrfs_disk_key key;
318 } __attribute__ ((__packed__));
321 * leaves have an item area and a data area:
322 * [item0, item1....itemN] [free space] [dataN...data1, data0]
324 * The data is separate from the items to get the keys closer together
328 struct btrfs_header header;
329 struct btrfs_item items[];
330 } __attribute__ ((__packed__));
333 * all non-leaf blocks are nodes, they hold only keys and pointers to
336 struct btrfs_key_ptr {
337 struct btrfs_disk_key key;
340 } __attribute__ ((__packed__));
343 struct btrfs_header header;
344 struct btrfs_key_ptr ptrs[];
345 } __attribute__ ((__packed__));
348 * btrfs_paths remember the path taken from the root down to the leaf.
349 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
350 * to any other levels that are present.
352 * The slots array records the index of the item or block pointer
353 * used while walking the tree.
355 enum { READA_NONE, READA_BACK, READA_FORWARD };
357 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
358 int slots[BTRFS_MAX_LEVEL];
359 /* if there is real range locking, this locks field will change */
360 u8 locks[BTRFS_MAX_LEVEL];
362 /* keep some upper locks as we walk down */
366 * set by btrfs_split_item, tells search_slot to keep all locks
367 * and to force calls to keep space in the nodes
369 unsigned int search_for_split:1;
370 unsigned int keep_locks:1;
371 unsigned int skip_locking:1;
372 unsigned int leave_spinning:1;
373 unsigned int search_commit_root:1;
374 unsigned int need_commit_sem:1;
375 unsigned int skip_release_on_error:1;
377 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
378 sizeof(struct btrfs_item))
379 struct btrfs_dev_replace {
380 u64 replace_state; /* see #define above */
381 time64_t time_started; /* seconds since 1-Jan-1970 */
382 time64_t time_stopped; /* seconds since 1-Jan-1970 */
383 atomic64_t num_write_errors;
384 atomic64_t num_uncorrectable_read_errors;
387 u64 committed_cursor_left;
388 u64 cursor_left_last_write_of_item;
391 u64 cont_reading_from_srcdev_mode; /* see #define above */
394 int item_needs_writeback;
395 struct btrfs_device *srcdev;
396 struct btrfs_device *tgtdev;
398 struct mutex lock_finishing_cancel_unmount;
399 struct rw_semaphore rwsem;
401 struct btrfs_scrub_progress scrub_progress;
403 struct percpu_counter bio_counter;
404 wait_queue_head_t replace_wait;
408 * free clusters are used to claim free space in relatively large chunks,
409 * allowing us to do less seeky writes. They are used for all metadata
410 * allocations. In ssd_spread mode they are also used for data allocations.
412 struct btrfs_free_cluster {
414 spinlock_t refill_lock;
417 /* largest extent in this cluster */
420 /* first extent starting offset */
423 /* We did a full search and couldn't create a cluster */
426 struct btrfs_block_group *block_group;
428 * when a cluster is allocated from a block group, we put the
429 * cluster onto a list in the block group so that it can
430 * be freed before the block group is freed.
432 struct list_head block_group_list;
435 enum btrfs_caching_type {
439 BTRFS_CACHE_FINISHED,
444 * Tree to record all locked full stripes of a RAID5/6 block group
446 struct btrfs_full_stripe_locks_tree {
451 /* Discard control. */
453 * Async discard uses multiple lists to differentiate the discard filter
454 * parameters. Index 0 is for completely free block groups where we need to
455 * ensure the entire block group is trimmed without being lossy. Indices
456 * afterwards represent monotonically decreasing discard filter sizes to
457 * prioritize what should be discarded next.
459 #define BTRFS_NR_DISCARD_LISTS 2
460 #define BTRFS_DISCARD_INDEX_UNUSED 0
461 #define BTRFS_DISCARD_INDEX_START 1
463 struct btrfs_discard_ctl {
464 struct workqueue_struct *discard_workers;
465 struct delayed_work work;
467 struct btrfs_block_group *block_group;
468 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
469 atomic_t discardable_extents;
470 atomic64_t discardable_bytes;
475 /* delayed seq elem */
477 struct list_head list;
481 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
483 #define SEQ_LAST ((u64)-1)
485 enum btrfs_orphan_cleanup_state {
486 ORPHAN_CLEANUP_STARTED = 1,
487 ORPHAN_CLEANUP_DONE = 2,
490 void btrfs_init_async_reclaim_work(struct work_struct *work);
493 struct reloc_control;
495 struct btrfs_fs_devices;
496 struct btrfs_balance_control;
497 struct btrfs_delayed_root;
500 * Block group or device which contains an active swapfile. Used for preventing
501 * unsafe operations while a swapfile is active.
503 * These are sorted on (ptr, inode) (note that a block group or device can
504 * contain more than one swapfile). We compare the pointer values because we
505 * don't actually care what the object is, we just need a quick check whether
506 * the object exists in the rbtree.
508 struct btrfs_swapfile_pin {
513 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
514 * points to a struct btrfs_device.
519 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
523 BTRFS_FS_CLOSING_START,
524 BTRFS_FS_CLOSING_DONE,
525 BTRFS_FS_LOG_RECOVERING,
527 BTRFS_FS_QUOTA_ENABLED,
528 BTRFS_FS_UPDATE_UUID_TREE_GEN,
529 BTRFS_FS_CREATING_FREE_SPACE_TREE,
533 BTRFS_FS_QUOTA_OVERRIDE,
534 /* Used to record internally whether fs has been frozen */
537 * Indicate that a whole-filesystem exclusive operation is running
538 * (device replace, resize, device add/delete, balance)
542 * To info transaction_kthread we need an immediate commit so it
543 * doesn't need to wait for commit_interval
545 BTRFS_FS_NEED_ASYNC_COMMIT,
547 * Indicate that balance has been set up from the ioctl and is in the
548 * main phase. The fs_info::balance_ctl is initialized.
549 * Set and cleared while holding fs_info::balance_mutex.
551 BTRFS_FS_BALANCE_RUNNING,
553 /* Indicate that the cleaner thread is awake and doing something. */
554 BTRFS_FS_CLEANER_RUNNING,
557 * The checksumming has an optimized version and is considered fast,
558 * so we don't need to offload checksums to workqueues.
560 BTRFS_FS_CSUM_IMPL_FAST,
562 /* Indicate that the discard workqueue can service discards. */
563 BTRFS_FS_DISCARD_RUNNING,
566 struct btrfs_fs_info {
567 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
569 struct btrfs_root *extent_root;
570 struct btrfs_root *tree_root;
571 struct btrfs_root *chunk_root;
572 struct btrfs_root *dev_root;
573 struct btrfs_root *fs_root;
574 struct btrfs_root *csum_root;
575 struct btrfs_root *quota_root;
576 struct btrfs_root *uuid_root;
577 struct btrfs_root *free_space_root;
579 /* the log root tree is a directory of all the other log roots */
580 struct btrfs_root *log_root_tree;
582 spinlock_t fs_roots_radix_lock;
583 struct radix_tree_root fs_roots_radix;
585 /* block group cache stuff */
586 spinlock_t block_group_cache_lock;
587 u64 first_logical_byte;
588 struct rb_root block_group_cache_tree;
590 /* keep track of unallocated space */
591 atomic64_t free_chunk_space;
593 struct extent_io_tree freed_extents[2];
594 struct extent_io_tree *pinned_extents;
596 /* logical->physical extent mapping */
597 struct extent_map_tree mapping_tree;
600 * block reservation for extent, checksum, root tree and
601 * delayed dir index item
603 struct btrfs_block_rsv global_block_rsv;
604 /* block reservation for metadata operations */
605 struct btrfs_block_rsv trans_block_rsv;
606 /* block reservation for chunk tree */
607 struct btrfs_block_rsv chunk_block_rsv;
608 /* block reservation for delayed operations */
609 struct btrfs_block_rsv delayed_block_rsv;
610 /* block reservation for delayed refs */
611 struct btrfs_block_rsv delayed_refs_rsv;
613 struct btrfs_block_rsv empty_block_rsv;
616 u64 last_trans_committed;
617 u64 avg_delayed_ref_runtime;
620 * this is updated to the current trans every time a full commit
621 * is required instead of the faster short fsync log commits
623 u64 last_trans_log_full_commit;
624 unsigned long mount_opt;
626 * Track requests for actions that need to be done during transaction
627 * commit (like for some mount options).
629 unsigned long pending_changes;
630 unsigned long compress_type:4;
631 unsigned int compress_level;
634 * It is a suggestive number, the read side is safe even it gets a
635 * wrong number because we will write out the data into a regular
636 * extent. The write side(mount/remount) is under ->s_umount lock,
637 * so it is also safe.
641 struct btrfs_transaction *running_transaction;
642 wait_queue_head_t transaction_throttle;
643 wait_queue_head_t transaction_wait;
644 wait_queue_head_t transaction_blocked_wait;
645 wait_queue_head_t async_submit_wait;
648 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
649 * when they are updated.
651 * Because we do not clear the flags for ever, so we needn't use
652 * the lock on the read side.
654 * We also needn't use the lock when we mount the fs, because
655 * there is no other task which will update the flag.
657 spinlock_t super_lock;
658 struct btrfs_super_block *super_copy;
659 struct btrfs_super_block *super_for_commit;
660 struct super_block *sb;
661 struct inode *btree_inode;
662 struct mutex tree_log_mutex;
663 struct mutex transaction_kthread_mutex;
664 struct mutex cleaner_mutex;
665 struct mutex chunk_mutex;
668 * this is taken to make sure we don't set block groups ro after
669 * the free space cache has been allocated on them
671 struct mutex ro_block_group_mutex;
673 /* this is used during read/modify/write to make sure
674 * no two ios are trying to mod the same stripe at the same
677 struct btrfs_stripe_hash_table *stripe_hash_table;
680 * this protects the ordered operations list only while we are
681 * processing all of the entries on it. This way we make
682 * sure the commit code doesn't find the list temporarily empty
683 * because another function happens to be doing non-waiting preflush
684 * before jumping into the main commit.
686 struct mutex ordered_operations_mutex;
688 struct rw_semaphore commit_root_sem;
690 struct rw_semaphore cleanup_work_sem;
692 struct rw_semaphore subvol_sem;
693 struct srcu_struct subvol_srcu;
695 spinlock_t trans_lock;
697 * the reloc mutex goes with the trans lock, it is taken
698 * during commit to protect us from the relocation code
700 struct mutex reloc_mutex;
702 struct list_head trans_list;
703 struct list_head dead_roots;
704 struct list_head caching_block_groups;
706 spinlock_t delayed_iput_lock;
707 struct list_head delayed_iputs;
708 atomic_t nr_delayed_iputs;
709 wait_queue_head_t delayed_iputs_wait;
711 /* this protects tree_mod_seq_list */
712 spinlock_t tree_mod_seq_lock;
713 atomic64_t tree_mod_seq;
714 struct list_head tree_mod_seq_list;
716 /* this protects tree_mod_log */
717 rwlock_t tree_mod_log_lock;
718 struct rb_root tree_mod_log;
720 atomic_t async_delalloc_pages;
723 * this is used to protect the following list -- ordered_roots.
725 spinlock_t ordered_root_lock;
728 * all fs/file tree roots in which there are data=ordered extents
729 * pending writeback are added into this list.
731 * these can span multiple transactions and basically include
732 * every dirty data page that isn't from nodatacow
734 struct list_head ordered_roots;
736 struct mutex delalloc_root_mutex;
737 spinlock_t delalloc_root_lock;
738 /* all fs/file tree roots that have delalloc inodes. */
739 struct list_head delalloc_roots;
742 * there is a pool of worker threads for checksumming during writes
743 * and a pool for checksumming after reads. This is because readers
744 * can run with FS locks held, and the writers may be waiting for
745 * those locks. We don't want ordering in the pending list to cause
746 * deadlocks, and so the two are serviced separately.
748 * A third pool does submit_bio to avoid deadlocking with the other
751 struct btrfs_workqueue *workers;
752 struct btrfs_workqueue *delalloc_workers;
753 struct btrfs_workqueue *flush_workers;
754 struct btrfs_workqueue *endio_workers;
755 struct btrfs_workqueue *endio_meta_workers;
756 struct btrfs_workqueue *endio_raid56_workers;
757 struct btrfs_workqueue *endio_repair_workers;
758 struct btrfs_workqueue *rmw_workers;
759 struct btrfs_workqueue *endio_meta_write_workers;
760 struct btrfs_workqueue *endio_write_workers;
761 struct btrfs_workqueue *endio_freespace_worker;
762 struct btrfs_workqueue *caching_workers;
763 struct btrfs_workqueue *readahead_workers;
766 * fixup workers take dirty pages that didn't properly go through
767 * the cow mechanism and make them safe to write. It happens
768 * for the sys_munmap function call path
770 struct btrfs_workqueue *fixup_workers;
771 struct btrfs_workqueue *delayed_workers;
773 struct task_struct *transaction_kthread;
774 struct task_struct *cleaner_kthread;
775 u32 thread_pool_size;
777 struct kobject *space_info_kobj;
781 /* used to keep from writing metadata until there is a nice batch */
782 struct percpu_counter dirty_metadata_bytes;
783 struct percpu_counter delalloc_bytes;
784 struct percpu_counter dio_bytes;
785 s32 dirty_metadata_batch;
788 struct list_head dirty_cowonly_roots;
790 struct btrfs_fs_devices *fs_devices;
793 * The space_info list is effectively read only after initial
794 * setup. It is populated at mount time and cleaned up after
795 * all block groups are removed. RCU is used to protect it.
797 struct list_head space_info;
799 struct btrfs_space_info *data_sinfo;
801 struct reloc_control *reloc_ctl;
803 /* data_alloc_cluster is only used in ssd_spread mode */
804 struct btrfs_free_cluster data_alloc_cluster;
806 /* all metadata allocations go through this cluster */
807 struct btrfs_free_cluster meta_alloc_cluster;
809 /* auto defrag inodes go here */
810 spinlock_t defrag_inodes_lock;
811 struct rb_root defrag_inodes;
812 atomic_t defrag_running;
814 /* Used to protect avail_{data, metadata, system}_alloc_bits */
815 seqlock_t profiles_lock;
817 * these three are in extended format (availability of single
818 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
819 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
821 u64 avail_data_alloc_bits;
822 u64 avail_metadata_alloc_bits;
823 u64 avail_system_alloc_bits;
825 /* restriper state */
826 spinlock_t balance_lock;
827 struct mutex balance_mutex;
828 atomic_t balance_pause_req;
829 atomic_t balance_cancel_req;
830 struct btrfs_balance_control *balance_ctl;
831 wait_queue_head_t balance_wait_q;
833 u32 data_chunk_allocations;
838 /* private scrub information */
839 struct mutex scrub_lock;
840 atomic_t scrubs_running;
841 atomic_t scrub_pause_req;
842 atomic_t scrubs_paused;
843 atomic_t scrub_cancel_req;
844 wait_queue_head_t scrub_pause_wait;
846 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
849 refcount_t scrub_workers_refcnt;
850 struct btrfs_workqueue *scrub_workers;
851 struct btrfs_workqueue *scrub_wr_completion_workers;
852 struct btrfs_workqueue *scrub_parity_workers;
854 struct btrfs_discard_ctl discard_ctl;
856 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
857 u32 check_integrity_print_mask;
859 /* is qgroup tracking in a consistent state? */
862 /* holds configuration and tracking. Protected by qgroup_lock */
863 struct rb_root qgroup_tree;
864 spinlock_t qgroup_lock;
867 * used to avoid frequently calling ulist_alloc()/ulist_free()
868 * when doing qgroup accounting, it must be protected by qgroup_lock.
870 struct ulist *qgroup_ulist;
872 /* protect user change for quota operations */
873 struct mutex qgroup_ioctl_lock;
875 /* list of dirty qgroups to be written at next commit */
876 struct list_head dirty_qgroups;
878 /* used by qgroup for an efficient tree traversal */
881 /* qgroup rescan items */
882 struct mutex qgroup_rescan_lock; /* protects the progress item */
883 struct btrfs_key qgroup_rescan_progress;
884 struct btrfs_workqueue *qgroup_rescan_workers;
885 struct completion qgroup_rescan_completion;
886 struct btrfs_work qgroup_rescan_work;
887 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
889 /* filesystem state */
890 unsigned long fs_state;
892 struct btrfs_delayed_root *delayed_root;
895 spinlock_t reada_lock;
896 struct radix_tree_root reada_tree;
898 /* readahead works cnt */
899 atomic_t reada_works_cnt;
901 /* Extent buffer radix tree */
902 spinlock_t buffer_lock;
903 struct radix_tree_root buffer_radix;
905 /* next backup root to be overwritten */
906 int backup_root_index;
908 /* device replace state */
909 struct btrfs_dev_replace dev_replace;
911 struct semaphore uuid_tree_rescan_sem;
913 /* Used to reclaim the metadata space in the background. */
914 struct work_struct async_reclaim_work;
916 spinlock_t unused_bgs_lock;
917 struct list_head unused_bgs;
918 struct mutex unused_bg_unpin_mutex;
919 struct mutex delete_unused_bgs_mutex;
921 /* Cached block sizes */
926 /* Block groups and devices containing active swapfiles. */
927 spinlock_t swapfile_pins_lock;
928 struct rb_root swapfile_pins;
930 struct crypto_shash *csum_shash;
933 * Number of send operations in progress.
934 * Updated while holding fs_info::balance_mutex.
936 int send_in_progress;
938 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
939 spinlock_t ref_verify_lock;
940 struct rb_root block_tree;
943 #ifdef CONFIG_BTRFS_DEBUG
944 struct kobject *debug_kobj;
945 struct kobject *discard_debug_kobj;
949 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
951 return sb->s_fs_info;
954 struct btrfs_subvolume_writers {
955 struct percpu_counter counter;
956 wait_queue_head_t wait;
960 * The state of btrfs root
964 * btrfs_record_root_in_trans is a multi-step process, and it can race
965 * with the balancing code. But the race is very small, and only the
966 * first time the root is added to each transaction. So IN_TRANS_SETUP
967 * is used to tell us when more checks are required
969 BTRFS_ROOT_IN_TRANS_SETUP,
971 BTRFS_ROOT_TRACK_DIRTY,
973 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
974 BTRFS_ROOT_DEFRAG_RUNNING,
975 BTRFS_ROOT_FORCE_COW,
976 BTRFS_ROOT_MULTI_LOG_TASKS,
981 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
983 * Set for the subvolume tree owning the reloc tree.
985 BTRFS_ROOT_DEAD_RELOC_TREE,
986 /* Mark dead root stored on device whose cleanup needs to be resumed */
987 BTRFS_ROOT_DEAD_TREE,
991 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
992 * code. For detail check comment in fs/btrfs/qgroup.c.
994 struct btrfs_qgroup_swapped_blocks {
996 /* RM_EMPTY_ROOT() of above blocks[] */
998 struct rb_root blocks[BTRFS_MAX_LEVEL];
1002 * in ram representation of the tree. extent_root is used for all allocations
1003 * and for the extent tree extent_root root.
1006 struct extent_buffer *node;
1008 struct extent_buffer *commit_root;
1009 struct btrfs_root *log_root;
1010 struct btrfs_root *reloc_root;
1012 unsigned long state;
1013 struct btrfs_root_item root_item;
1014 struct btrfs_key root_key;
1015 struct btrfs_fs_info *fs_info;
1016 struct extent_io_tree dirty_log_pages;
1018 struct mutex objectid_mutex;
1020 spinlock_t accounting_lock;
1021 struct btrfs_block_rsv *block_rsv;
1023 /* free ino cache stuff */
1024 struct btrfs_free_space_ctl *free_ino_ctl;
1025 enum btrfs_caching_type ino_cache_state;
1026 spinlock_t ino_cache_lock;
1027 wait_queue_head_t ino_cache_wait;
1028 struct btrfs_free_space_ctl *free_ino_pinned;
1029 u64 ino_cache_progress;
1030 struct inode *ino_cache_inode;
1032 struct mutex log_mutex;
1033 wait_queue_head_t log_writer_wait;
1034 wait_queue_head_t log_commit_wait[2];
1035 struct list_head log_ctxs[2];
1036 atomic_t log_writers;
1037 atomic_t log_commit[2];
1040 /* No matter the commit succeeds or not*/
1041 int log_transid_committed;
1042 /* Just be updated when the commit succeeds. */
1043 int last_log_commit;
1044 pid_t log_start_pid;
1050 u64 highest_objectid;
1052 u64 defrag_trans_start;
1053 struct btrfs_key defrag_progress;
1054 struct btrfs_key defrag_max;
1056 /* the dirty list is only used by non-reference counted roots */
1057 struct list_head dirty_list;
1059 struct list_head root_list;
1061 spinlock_t log_extents_lock[2];
1062 struct list_head logged_list[2];
1064 int orphan_cleanup_state;
1066 spinlock_t inode_lock;
1067 /* red-black tree that keeps track of in-memory inodes */
1068 struct rb_root inode_tree;
1071 * radix tree that keeps track of delayed nodes of every inode,
1072 * protected by inode_lock
1074 struct radix_tree_root delayed_nodes_tree;
1076 * right now this just gets used so that a root has its own devid
1077 * for stat. It may be used for more later
1081 spinlock_t root_item_lock;
1084 struct mutex delalloc_mutex;
1085 spinlock_t delalloc_lock;
1087 * all of the inodes that have delalloc bytes. It is possible for
1088 * this list to be empty even when there is still dirty data=ordered
1089 * extents waiting to finish IO.
1091 struct list_head delalloc_inodes;
1092 struct list_head delalloc_root;
1093 u64 nr_delalloc_inodes;
1095 struct mutex ordered_extent_mutex;
1097 * this is used by the balancing code to wait for all the pending
1100 spinlock_t ordered_extent_lock;
1103 * all of the data=ordered extents pending writeback
1104 * these can span multiple transactions and basically include
1105 * every dirty data page that isn't from nodatacow
1107 struct list_head ordered_extents;
1108 struct list_head ordered_root;
1109 u64 nr_ordered_extents;
1112 * Not empty if this subvolume root has gone through tree block swap
1115 * Will be used by reloc_control::dirty_subvol_roots.
1117 struct list_head reloc_dirty_list;
1120 * Number of currently running SEND ioctls to prevent
1121 * manipulation with the read-only status via SUBVOL_SETFLAGS
1123 int send_in_progress;
1125 * Number of currently running deduplication operations that have a
1126 * destination inode belonging to this root. Protected by the lock
1129 int dedupe_in_progress;
1130 struct btrfs_subvolume_writers *subv_writers;
1131 atomic_t will_be_snapshotted;
1132 atomic_t snapshot_force_cow;
1134 /* For qgroup metadata reserved space */
1135 spinlock_t qgroup_meta_rsv_lock;
1136 u64 qgroup_meta_rsv_pertrans;
1137 u64 qgroup_meta_rsv_prealloc;
1139 /* Number of active swapfiles */
1140 atomic_t nr_swapfiles;
1142 /* Record pairs of swapped blocks for qgroup */
1143 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1145 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1150 struct btrfs_clone_extent_info {
1160 struct btrfs_file_private {
1164 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1166 return btrfs_sb(inode->i_sb)->sectorsize;
1169 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1172 return info->nodesize - sizeof(struct btrfs_header);
1175 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1177 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1179 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1182 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1184 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1187 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1188 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1189 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1191 return BTRFS_MAX_ITEM_SIZE(info) -
1192 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1195 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1197 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1201 * Flags for mount options.
1203 * Note: don't forget to add new options to btrfs_show_options()
1205 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1206 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1207 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1208 #define BTRFS_MOUNT_SSD (1 << 3)
1209 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1210 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1211 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1212 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1213 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1214 #define BTRFS_MOUNT_NOSSD (1 << 9)
1215 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1216 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1217 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1218 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1219 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1220 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1221 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1222 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1223 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1224 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1225 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1226 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1227 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1228 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1229 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1230 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1231 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1232 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1233 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1234 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1236 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1237 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1239 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1240 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1241 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1242 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1245 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1247 if (!btrfs_test_opt(fs_info, opt)) \
1248 btrfs_info(fs_info, fmt, ##args); \
1249 btrfs_set_opt(fs_info->mount_opt, opt); \
1252 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1254 if (btrfs_test_opt(fs_info, opt)) \
1255 btrfs_info(fs_info, fmt, ##args); \
1256 btrfs_clear_opt(fs_info->mount_opt, opt); \
1260 * Requests for changes that need to be done during transaction commit.
1262 * Internal mount options that are used for special handling of the real
1263 * mount options (eg. cannot be set during remount and have to be set during
1264 * transaction commit)
1267 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1268 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1269 #define BTRFS_PENDING_COMMIT (2)
1271 #define btrfs_test_pending(info, opt) \
1272 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1273 #define btrfs_set_pending(info, opt) \
1274 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1275 #define btrfs_clear_pending(info, opt) \
1276 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1279 * Helpers for setting pending mount option changes.
1281 * Expects corresponding macros
1282 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1284 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1286 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1287 btrfs_info((info), fmt, ##args); \
1288 btrfs_set_pending((info), SET_##opt); \
1289 btrfs_clear_pending((info), CLEAR_##opt); \
1293 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1295 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1296 btrfs_info((info), fmt, ##args); \
1297 btrfs_set_pending((info), CLEAR_##opt); \
1298 btrfs_clear_pending((info), SET_##opt); \
1305 #define BTRFS_INODE_NODATASUM (1 << 0)
1306 #define BTRFS_INODE_NODATACOW (1 << 1)
1307 #define BTRFS_INODE_READONLY (1 << 2)
1308 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1309 #define BTRFS_INODE_PREALLOC (1 << 4)
1310 #define BTRFS_INODE_SYNC (1 << 5)
1311 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1312 #define BTRFS_INODE_APPEND (1 << 7)
1313 #define BTRFS_INODE_NODUMP (1 << 8)
1314 #define BTRFS_INODE_NOATIME (1 << 9)
1315 #define BTRFS_INODE_DIRSYNC (1 << 10)
1316 #define BTRFS_INODE_COMPRESS (1 << 11)
1318 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1320 #define BTRFS_INODE_FLAG_MASK \
1321 (BTRFS_INODE_NODATASUM | \
1322 BTRFS_INODE_NODATACOW | \
1323 BTRFS_INODE_READONLY | \
1324 BTRFS_INODE_NOCOMPRESS | \
1325 BTRFS_INODE_PREALLOC | \
1326 BTRFS_INODE_SYNC | \
1327 BTRFS_INODE_IMMUTABLE | \
1328 BTRFS_INODE_APPEND | \
1329 BTRFS_INODE_NODUMP | \
1330 BTRFS_INODE_NOATIME | \
1331 BTRFS_INODE_DIRSYNC | \
1332 BTRFS_INODE_COMPRESS | \
1333 BTRFS_INODE_ROOT_ITEM_INIT)
1335 struct btrfs_map_token {
1336 const struct extent_buffer *eb;
1338 unsigned long offset;
1341 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1342 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1344 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1345 struct extent_buffer *eb)
1348 token->kaddr = NULL;
1351 /* some macros to generate set/get functions for the struct fields. This
1352 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1355 #define le8_to_cpu(v) (v)
1356 #define cpu_to_le8(v) (v)
1359 #define read_eb_member(eb, ptr, type, member, result) (\
1360 read_extent_buffer(eb, (char *)(result), \
1361 ((unsigned long)(ptr)) + \
1362 offsetof(type, member), \
1363 sizeof(((type *)0)->member)))
1365 #define write_eb_member(eb, ptr, type, member, result) (\
1366 write_extent_buffer(eb, (char *)(result), \
1367 ((unsigned long)(ptr)) + \
1368 offsetof(type, member), \
1369 sizeof(((type *)0)->member)))
1371 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1372 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1373 const void *ptr, unsigned long off, \
1374 struct btrfs_map_token *token); \
1375 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1376 unsigned long off, u##bits val, \
1377 struct btrfs_map_token *token); \
1378 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1379 const void *ptr, unsigned long off); \
1380 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1381 unsigned long off, u##bits val);
1383 DECLARE_BTRFS_SETGET_BITS(8)
1384 DECLARE_BTRFS_SETGET_BITS(16)
1385 DECLARE_BTRFS_SETGET_BITS(32)
1386 DECLARE_BTRFS_SETGET_BITS(64)
1388 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1389 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1392 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1393 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1395 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1398 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1399 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1401 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1403 struct btrfs_map_token *token) \
1405 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1406 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1408 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1409 type *s, u##bits val, \
1410 struct btrfs_map_token *token) \
1412 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1413 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1416 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1417 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1419 const type *p = page_address(eb->pages[0]); \
1420 u##bits res = le##bits##_to_cpu(p->member); \
1423 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1426 type *p = page_address(eb->pages[0]); \
1427 p->member = cpu_to_le##bits(val); \
1430 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1431 static inline u##bits btrfs_##name(const type *s) \
1433 return le##bits##_to_cpu(s->member); \
1435 static inline void btrfs_set_##name(type *s, u##bits val) \
1437 s->member = cpu_to_le##bits(val); \
1441 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1442 struct btrfs_dev_item *s)
1444 BUILD_BUG_ON(sizeof(u64) !=
1445 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1446 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1449 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1450 struct btrfs_dev_item *s,
1453 BUILD_BUG_ON(sizeof(u64) !=
1454 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1455 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1456 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1460 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1461 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1462 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1463 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1464 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1466 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1467 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1468 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1469 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1470 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1471 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1473 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1474 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1476 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1478 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1480 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1482 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1484 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1485 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1487 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1489 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1491 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1494 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1496 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1499 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1501 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1504 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1505 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1506 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1507 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1508 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1509 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1510 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1511 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1512 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1513 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1514 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1516 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1518 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1521 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1522 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1523 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1525 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1527 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1529 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1531 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1532 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1534 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1536 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1537 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1539 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1542 unsigned long offset = (unsigned long)c;
1543 offset += offsetof(struct btrfs_chunk, stripe);
1544 offset += nr * sizeof(struct btrfs_stripe);
1545 return (struct btrfs_stripe *)offset;
1548 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1550 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1553 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1554 struct btrfs_chunk *c, int nr)
1556 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1559 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1560 struct btrfs_chunk *c, int nr)
1562 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1565 /* struct btrfs_block_group_item */
1566 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1568 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1570 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1571 struct btrfs_block_group_item, chunk_objectid, 64);
1573 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1574 struct btrfs_block_group_item, chunk_objectid, 64);
1575 BTRFS_SETGET_FUNCS(block_group_flags,
1576 struct btrfs_block_group_item, flags, 64);
1577 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1578 struct btrfs_block_group_item, flags, 64);
1580 /* struct btrfs_free_space_info */
1581 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1583 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1585 /* struct btrfs_inode_ref */
1586 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1587 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1589 /* struct btrfs_inode_extref */
1590 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1591 parent_objectid, 64);
1592 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1594 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1596 /* struct btrfs_inode_item */
1597 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1598 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1599 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1600 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1601 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1602 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1603 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1604 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1605 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1606 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1607 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1608 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1609 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1611 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1613 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1615 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1618 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1621 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1623 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1625 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1626 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1627 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1628 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1629 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1631 /* struct btrfs_dev_extent */
1632 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1634 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1635 chunk_objectid, 64);
1636 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1638 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1640 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1642 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1643 return (unsigned long)dev + ptr;
1646 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1647 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1649 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1651 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1654 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1656 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1657 struct btrfs_tree_block_info *item,
1658 struct btrfs_disk_key *key)
1660 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1663 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1664 struct btrfs_tree_block_info *item,
1665 struct btrfs_disk_key *key)
1667 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1670 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1672 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1674 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1676 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1679 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1682 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1684 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1687 static inline u32 btrfs_extent_inline_ref_size(int type)
1689 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1690 type == BTRFS_SHARED_BLOCK_REF_KEY)
1691 return sizeof(struct btrfs_extent_inline_ref);
1692 if (type == BTRFS_SHARED_DATA_REF_KEY)
1693 return sizeof(struct btrfs_shared_data_ref) +
1694 sizeof(struct btrfs_extent_inline_ref);
1695 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1696 return sizeof(struct btrfs_extent_data_ref) +
1697 offsetof(struct btrfs_extent_inline_ref, offset);
1701 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1702 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1704 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1705 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1707 /* struct btrfs_node */
1708 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1709 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1710 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1712 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1715 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1718 ptr = offsetof(struct btrfs_node, ptrs) +
1719 sizeof(struct btrfs_key_ptr) * nr;
1720 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1723 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1727 ptr = offsetof(struct btrfs_node, ptrs) +
1728 sizeof(struct btrfs_key_ptr) * nr;
1729 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1732 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1735 ptr = offsetof(struct btrfs_node, ptrs) +
1736 sizeof(struct btrfs_key_ptr) * nr;
1737 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1740 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1744 ptr = offsetof(struct btrfs_node, ptrs) +
1745 sizeof(struct btrfs_key_ptr) * nr;
1746 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1749 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1751 return offsetof(struct btrfs_node, ptrs) +
1752 sizeof(struct btrfs_key_ptr) * nr;
1755 void btrfs_node_key(const struct extent_buffer *eb,
1756 struct btrfs_disk_key *disk_key, int nr);
1758 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1759 struct btrfs_disk_key *disk_key, int nr)
1762 ptr = btrfs_node_key_ptr_offset(nr);
1763 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1764 struct btrfs_key_ptr, key, disk_key);
1767 /* struct btrfs_item */
1768 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1769 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1770 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1771 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1773 static inline unsigned long btrfs_item_nr_offset(int nr)
1775 return offsetof(struct btrfs_leaf, items) +
1776 sizeof(struct btrfs_item) * nr;
1779 static inline struct btrfs_item *btrfs_item_nr(int nr)
1781 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1784 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1785 struct btrfs_item *item)
1787 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1790 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1792 return btrfs_item_end(eb, btrfs_item_nr(nr));
1795 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1797 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1800 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1802 return btrfs_item_size(eb, btrfs_item_nr(nr));
1805 static inline void btrfs_item_key(const struct extent_buffer *eb,
1806 struct btrfs_disk_key *disk_key, int nr)
1808 struct btrfs_item *item = btrfs_item_nr(nr);
1809 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1812 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1813 struct btrfs_disk_key *disk_key, int nr)
1815 struct btrfs_item *item = btrfs_item_nr(nr);
1816 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1819 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1822 * struct btrfs_root_ref
1824 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1825 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1826 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1828 /* struct btrfs_dir_item */
1829 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1830 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1831 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1832 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1833 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1834 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1836 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1838 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1841 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1842 const struct btrfs_dir_item *item,
1843 struct btrfs_disk_key *key)
1845 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1848 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1849 struct btrfs_dir_item *item,
1850 const struct btrfs_disk_key *key)
1852 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1855 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1857 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1859 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1862 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1863 const struct btrfs_free_space_header *h,
1864 struct btrfs_disk_key *key)
1866 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1869 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1870 struct btrfs_free_space_header *h,
1871 const struct btrfs_disk_key *key)
1873 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1876 /* struct btrfs_disk_key */
1877 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1879 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1880 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1882 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1883 const struct btrfs_disk_key *disk)
1885 cpu->offset = le64_to_cpu(disk->offset);
1886 cpu->type = disk->type;
1887 cpu->objectid = le64_to_cpu(disk->objectid);
1890 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1891 const struct btrfs_key *cpu)
1893 disk->offset = cpu_to_le64(cpu->offset);
1894 disk->type = cpu->type;
1895 disk->objectid = cpu_to_le64(cpu->objectid);
1898 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1899 struct btrfs_key *key, int nr)
1901 struct btrfs_disk_key disk_key;
1902 btrfs_node_key(eb, &disk_key, nr);
1903 btrfs_disk_key_to_cpu(key, &disk_key);
1906 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1907 struct btrfs_key *key, int nr)
1909 struct btrfs_disk_key disk_key;
1910 btrfs_item_key(eb, &disk_key, nr);
1911 btrfs_disk_key_to_cpu(key, &disk_key);
1914 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1915 const struct btrfs_dir_item *item,
1916 struct btrfs_key *key)
1918 struct btrfs_disk_key disk_key;
1919 btrfs_dir_item_key(eb, item, &disk_key);
1920 btrfs_disk_key_to_cpu(key, &disk_key);
1923 /* struct btrfs_header */
1924 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1925 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1927 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1928 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1929 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1930 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1931 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1933 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1934 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1936 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1938 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1940 return (btrfs_header_flags(eb) & flag) == flag;
1943 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1945 u64 flags = btrfs_header_flags(eb);
1946 btrfs_set_header_flags(eb, flags | flag);
1949 static inline void btrfs_clear_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 int btrfs_header_backref_rev(const struct extent_buffer *eb)
1957 u64 flags = btrfs_header_flags(eb);
1958 return flags >> BTRFS_BACKREF_REV_SHIFT;
1961 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1964 u64 flags = btrfs_header_flags(eb);
1965 flags &= ~BTRFS_BACKREF_REV_MASK;
1966 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1967 btrfs_set_header_flags(eb, flags);
1970 static inline unsigned long btrfs_header_fsid(void)
1972 return offsetof(struct btrfs_header, fsid);
1975 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
1977 return offsetof(struct btrfs_header, chunk_tree_uuid);
1980 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1982 return btrfs_header_level(eb) == 0;
1985 /* struct btrfs_root_item */
1986 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1988 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1989 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1990 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1992 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1994 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1995 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1996 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1997 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1998 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1999 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2000 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2001 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2003 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2005 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2007 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2009 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2011 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2014 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2016 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2019 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2021 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2024 /* struct btrfs_root_backup */
2025 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2027 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2029 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2030 tree_root_level, 8);
2032 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2034 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2035 chunk_root_gen, 64);
2036 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2037 chunk_root_level, 8);
2039 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2041 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2042 extent_root_gen, 64);
2043 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2044 extent_root_level, 8);
2046 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2048 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2050 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2053 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2055 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2057 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2060 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2062 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2064 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2065 csum_root_level, 8);
2066 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2068 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2070 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2073 /* struct btrfs_balance_item */
2074 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2076 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2077 const struct btrfs_balance_item *bi,
2078 struct btrfs_disk_balance_args *ba)
2080 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2083 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2084 struct btrfs_balance_item *bi,
2085 const struct btrfs_disk_balance_args *ba)
2087 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2090 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2091 const struct btrfs_balance_item *bi,
2092 struct btrfs_disk_balance_args *ba)
2094 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2097 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2098 struct btrfs_balance_item *bi,
2099 const struct btrfs_disk_balance_args *ba)
2101 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2104 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2105 const struct btrfs_balance_item *bi,
2106 struct btrfs_disk_balance_args *ba)
2108 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2111 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2112 struct btrfs_balance_item *bi,
2113 const struct btrfs_disk_balance_args *ba)
2115 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2119 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2120 const struct btrfs_disk_balance_args *disk)
2122 memset(cpu, 0, sizeof(*cpu));
2124 cpu->profiles = le64_to_cpu(disk->profiles);
2125 cpu->usage = le64_to_cpu(disk->usage);
2126 cpu->devid = le64_to_cpu(disk->devid);
2127 cpu->pstart = le64_to_cpu(disk->pstart);
2128 cpu->pend = le64_to_cpu(disk->pend);
2129 cpu->vstart = le64_to_cpu(disk->vstart);
2130 cpu->vend = le64_to_cpu(disk->vend);
2131 cpu->target = le64_to_cpu(disk->target);
2132 cpu->flags = le64_to_cpu(disk->flags);
2133 cpu->limit = le64_to_cpu(disk->limit);
2134 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2135 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2139 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2140 const struct btrfs_balance_args *cpu)
2142 memset(disk, 0, sizeof(*disk));
2144 disk->profiles = cpu_to_le64(cpu->profiles);
2145 disk->usage = cpu_to_le64(cpu->usage);
2146 disk->devid = cpu_to_le64(cpu->devid);
2147 disk->pstart = cpu_to_le64(cpu->pstart);
2148 disk->pend = cpu_to_le64(cpu->pend);
2149 disk->vstart = cpu_to_le64(cpu->vstart);
2150 disk->vend = cpu_to_le64(cpu->vend);
2151 disk->target = cpu_to_le64(cpu->target);
2152 disk->flags = cpu_to_le64(cpu->flags);
2153 disk->limit = cpu_to_le64(cpu->limit);
2154 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2155 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2158 /* struct btrfs_super_block */
2159 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2160 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2161 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2163 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2164 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2165 struct btrfs_super_block, sys_chunk_array_size, 32);
2166 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2167 struct btrfs_super_block, chunk_root_generation, 64);
2168 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2170 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2172 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2173 chunk_root_level, 8);
2174 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2176 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2177 log_root_transid, 64);
2178 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2180 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2182 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2184 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2186 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2188 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2190 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2191 root_dir_objectid, 64);
2192 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2194 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2196 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2197 compat_ro_flags, 64);
2198 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2199 incompat_flags, 64);
2200 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2202 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2203 cache_generation, 64);
2204 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2205 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2206 uuid_tree_generation, 64);
2208 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2209 const char *btrfs_super_csum_name(u16 csum_type);
2210 const char *btrfs_super_csum_driver(u16 csum_type);
2211 size_t __const btrfs_get_num_csums(void);
2215 * The leaf data grows from end-to-front in the node.
2216 * this returns the address of the start of the last item,
2217 * which is the stop of the leaf data stack
2219 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2221 u32 nr = btrfs_header_nritems(leaf);
2224 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2225 return btrfs_item_offset_nr(leaf, nr - 1);
2228 /* struct btrfs_file_extent_item */
2229 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2230 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2231 struct btrfs_file_extent_item, disk_bytenr, 64);
2232 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2233 struct btrfs_file_extent_item, offset, 64);
2234 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2235 struct btrfs_file_extent_item, generation, 64);
2236 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2237 struct btrfs_file_extent_item, num_bytes, 64);
2238 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2239 struct btrfs_file_extent_item, disk_num_bytes, 64);
2240 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2241 struct btrfs_file_extent_item, compression, 8);
2243 static inline unsigned long
2244 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2246 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2249 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2251 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2254 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2256 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2258 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2259 disk_num_bytes, 64);
2260 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2262 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2264 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2266 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2268 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2270 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2271 other_encoding, 16);
2274 * this returns the number of bytes used by the item on disk, minus the
2275 * size of any extent headers. If a file is compressed on disk, this is
2276 * the compressed size
2278 static inline u32 btrfs_file_extent_inline_item_len(
2279 const struct extent_buffer *eb,
2280 struct btrfs_item *e)
2282 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2285 /* btrfs_qgroup_status_item */
2286 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2288 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2290 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2292 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2295 /* btrfs_qgroup_info_item */
2296 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2298 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2299 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2301 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2302 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2305 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2306 struct btrfs_qgroup_info_item, generation, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2309 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2310 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2311 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2313 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2314 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2316 /* btrfs_qgroup_limit_item */
2317 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2319 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2321 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2323 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2325 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2328 /* btrfs_dev_replace_item */
2329 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2330 struct btrfs_dev_replace_item, src_devid, 64);
2331 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2332 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2334 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2336 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2338 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2340 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2341 num_write_errors, 64);
2342 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2343 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2345 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2347 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2350 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2351 struct btrfs_dev_replace_item, src_devid, 64);
2352 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2353 struct btrfs_dev_replace_item,
2354 cont_reading_from_srcdev_mode, 64);
2355 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2356 struct btrfs_dev_replace_item, replace_state, 64);
2357 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2358 struct btrfs_dev_replace_item, time_started, 64);
2359 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2360 struct btrfs_dev_replace_item, time_stopped, 64);
2361 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2362 struct btrfs_dev_replace_item, num_write_errors, 64);
2363 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2364 struct btrfs_dev_replace_item,
2365 num_uncorrectable_read_errors, 64);
2366 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2367 struct btrfs_dev_replace_item, cursor_left, 64);
2368 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2369 struct btrfs_dev_replace_item, cursor_right, 64);
2371 /* helper function to cast into the data area of the leaf. */
2372 #define btrfs_item_ptr(leaf, slot, type) \
2373 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2374 btrfs_item_offset_nr(leaf, slot)))
2376 #define btrfs_item_ptr_offset(leaf, slot) \
2377 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2378 btrfs_item_offset_nr(leaf, slot)))
2380 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2382 return crc32c(crc, address, length);
2385 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2387 put_unaligned_le32(~crc, result);
2390 static inline u64 btrfs_name_hash(const char *name, int len)
2392 return crc32c((u32)~1, name, len);
2396 * Figure the key offset of an extended inode ref
2398 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2401 return (u64) crc32c(parent_objectid, name, len);
2404 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2406 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2411 enum btrfs_inline_ref_type {
2412 BTRFS_REF_TYPE_INVALID,
2413 BTRFS_REF_TYPE_BLOCK,
2414 BTRFS_REF_TYPE_DATA,
2418 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2419 struct btrfs_extent_inline_ref *iref,
2420 enum btrfs_inline_ref_type is_data);
2421 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2423 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2426 * Use this if we would be adding new items, as we could split nodes as we cow
2429 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2432 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2436 * Doing a truncate or a modification won't result in new nodes or leaves, just
2437 * what we need for COW.
2439 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2442 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2445 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2446 u64 start, u64 num_bytes);
2447 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2448 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2449 unsigned long count);
2450 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2451 struct btrfs_delayed_ref_root *delayed_refs,
2452 struct btrfs_delayed_ref_head *head);
2453 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2454 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2455 struct btrfs_fs_info *fs_info, u64 bytenr,
2456 u64 offset, int metadata, u64 *refs, u64 *flags);
2457 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2458 u64 bytenr, u64 num, int reserved);
2459 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2460 u64 bytenr, u64 num_bytes);
2461 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2462 int btrfs_cross_ref_exist(struct btrfs_root *root,
2463 u64 objectid, u64 offset, u64 bytenr);
2464 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2465 struct btrfs_root *root,
2466 u64 parent, u64 root_objectid,
2467 const struct btrfs_disk_key *key,
2468 int level, u64 hint,
2470 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root,
2472 struct extent_buffer *buf,
2473 u64 parent, int last_ref);
2474 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2475 struct btrfs_root *root, u64 owner,
2476 u64 offset, u64 ram_bytes,
2477 struct btrfs_key *ins);
2478 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2479 u64 root_objectid, u64 owner, u64 offset,
2480 struct btrfs_key *ins);
2481 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2482 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2483 struct btrfs_key *ins, int is_data, int delalloc);
2484 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2485 struct extent_buffer *buf, int full_backref);
2486 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2487 struct extent_buffer *buf, int full_backref);
2488 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2489 u64 bytenr, u64 num_bytes, u64 flags,
2490 int level, int is_data);
2491 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2493 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2494 u64 start, u64 len, int delalloc);
2495 int btrfs_pin_reserved_extent(struct btrfs_fs_info *fs_info, u64 start,
2497 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2498 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2499 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2500 struct btrfs_ref *generic_ref);
2502 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2503 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache);
2504 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache);
2505 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2507 enum btrfs_reserve_flush_enum {
2508 /* If we are in the transaction, we can't flush anything.*/
2509 BTRFS_RESERVE_NO_FLUSH,
2511 * Flushing delalloc may cause deadlock somewhere, in this
2512 * case, use FLUSH LIMIT
2514 BTRFS_RESERVE_FLUSH_LIMIT,
2515 BTRFS_RESERVE_FLUSH_EVICT,
2516 BTRFS_RESERVE_FLUSH_ALL,
2519 enum btrfs_flush_state {
2520 FLUSH_DELAYED_ITEMS_NR = 1,
2521 FLUSH_DELAYED_ITEMS = 2,
2522 FLUSH_DELAYED_REFS_NR = 3,
2523 FLUSH_DELAYED_REFS = 4,
2525 FLUSH_DELALLOC_WAIT = 6,
2527 ALLOC_CHUNK_FORCE = 8,
2528 RUN_DELAYED_IPUTS = 9,
2532 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2533 struct btrfs_block_rsv *rsv,
2534 int nitems, bool use_global_rsv);
2535 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2536 struct btrfs_block_rsv *rsv);
2537 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2539 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2540 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2541 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2542 u64 start, u64 end);
2543 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2544 u64 num_bytes, u64 *actual_bytes);
2545 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2547 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2548 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2549 struct btrfs_fs_info *fs_info);
2550 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2551 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2552 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2555 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2556 int level, int *slot);
2557 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2558 int btrfs_previous_item(struct btrfs_root *root,
2559 struct btrfs_path *path, u64 min_objectid,
2561 int btrfs_previous_extent_item(struct btrfs_root *root,
2562 struct btrfs_path *path, u64 min_objectid);
2563 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2564 struct btrfs_path *path,
2565 const struct btrfs_key *new_key);
2566 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2567 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2568 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2569 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2570 struct btrfs_key *key, int lowest_level,
2572 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2573 struct btrfs_path *path,
2575 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2578 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2579 struct btrfs_root *root, struct extent_buffer *buf,
2580 struct extent_buffer *parent, int parent_slot,
2581 struct extent_buffer **cow_ret);
2582 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2583 struct btrfs_root *root,
2584 struct extent_buffer *buf,
2585 struct extent_buffer **cow_ret, u64 new_root_objectid);
2586 int btrfs_block_can_be_shared(struct btrfs_root *root,
2587 struct extent_buffer *buf);
2588 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2589 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2590 int btrfs_split_item(struct btrfs_trans_handle *trans,
2591 struct btrfs_root *root,
2592 struct btrfs_path *path,
2593 const struct btrfs_key *new_key,
2594 unsigned long split_offset);
2595 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2596 struct btrfs_root *root,
2597 struct btrfs_path *path,
2598 const struct btrfs_key *new_key);
2599 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2600 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2601 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2602 const struct btrfs_key *key, struct btrfs_path *p,
2603 int ins_len, int cow);
2604 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2605 struct btrfs_path *p, u64 time_seq);
2606 int btrfs_search_slot_for_read(struct btrfs_root *root,
2607 const struct btrfs_key *key,
2608 struct btrfs_path *p, int find_higher,
2610 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2611 struct btrfs_root *root, struct extent_buffer *parent,
2612 int start_slot, u64 *last_ret,
2613 struct btrfs_key *progress);
2614 void btrfs_release_path(struct btrfs_path *p);
2615 struct btrfs_path *btrfs_alloc_path(void);
2616 void btrfs_free_path(struct btrfs_path *p);
2618 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2619 struct btrfs_path *path, int slot, int nr);
2620 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2621 struct btrfs_root *root,
2622 struct btrfs_path *path)
2624 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2627 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2628 const struct btrfs_key *cpu_key, u32 *data_size,
2629 u32 total_data, u32 total_size, int nr);
2630 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2631 const struct btrfs_key *key, void *data, u32 data_size);
2632 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2633 struct btrfs_root *root,
2634 struct btrfs_path *path,
2635 const struct btrfs_key *cpu_key, u32 *data_size,
2638 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2639 struct btrfs_root *root,
2640 struct btrfs_path *path,
2641 const struct btrfs_key *key,
2644 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2647 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2648 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2649 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2651 static inline int btrfs_next_old_item(struct btrfs_root *root,
2652 struct btrfs_path *p, u64 time_seq)
2655 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2656 return btrfs_next_old_leaf(root, p, time_seq);
2659 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2661 return btrfs_next_old_item(root, p, 0);
2663 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2664 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2665 struct btrfs_block_rsv *block_rsv,
2666 int update_ref, int for_reloc);
2667 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2668 struct btrfs_root *root,
2669 struct extent_buffer *node,
2670 struct extent_buffer *parent);
2671 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2674 * Do it this way so we only ever do one test_bit in the normal case.
2676 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2677 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2685 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2686 * anything except sleeping. This function is used to check the status of
2689 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2691 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2694 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2696 kfree(fs_info->balance_ctl);
2697 kfree(fs_info->delayed_root);
2698 kfree(fs_info->extent_root);
2699 kfree(fs_info->tree_root);
2700 kfree(fs_info->chunk_root);
2701 kfree(fs_info->dev_root);
2702 kfree(fs_info->csum_root);
2703 kfree(fs_info->quota_root);
2704 kfree(fs_info->uuid_root);
2705 kfree(fs_info->free_space_root);
2706 kfree(fs_info->super_copy);
2707 kfree(fs_info->super_for_commit);
2711 /* tree mod log functions from ctree.c */
2712 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2713 struct seq_list *elem);
2714 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2715 struct seq_list *elem);
2716 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2719 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2720 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2722 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2723 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2725 int btrfs_del_root(struct btrfs_trans_handle *trans,
2726 const struct btrfs_key *key);
2727 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2728 const struct btrfs_key *key,
2729 struct btrfs_root_item *item);
2730 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2731 struct btrfs_root *root,
2732 struct btrfs_key *key,
2733 struct btrfs_root_item *item);
2734 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2735 struct btrfs_path *path, struct btrfs_root_item *root_item,
2736 struct btrfs_key *root_key);
2737 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2738 void btrfs_set_root_node(struct btrfs_root_item *item,
2739 struct extent_buffer *node);
2740 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2741 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root);
2745 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2747 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2749 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2750 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2754 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2755 const char *name, int name_len);
2756 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2757 int name_len, struct btrfs_inode *dir,
2758 struct btrfs_key *location, u8 type, u64 index);
2759 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2760 struct btrfs_root *root,
2761 struct btrfs_path *path, u64 dir,
2762 const char *name, int name_len,
2764 struct btrfs_dir_item *
2765 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2766 struct btrfs_root *root,
2767 struct btrfs_path *path, u64 dir,
2768 u64 objectid, const char *name, int name_len,
2770 struct btrfs_dir_item *
2771 btrfs_search_dir_index_item(struct btrfs_root *root,
2772 struct btrfs_path *path, u64 dirid,
2773 const char *name, int name_len);
2774 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2775 struct btrfs_root *root,
2776 struct btrfs_path *path,
2777 struct btrfs_dir_item *di);
2778 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2779 struct btrfs_root *root,
2780 struct btrfs_path *path, u64 objectid,
2781 const char *name, u16 name_len,
2782 const void *data, u16 data_len);
2783 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2784 struct btrfs_root *root,
2785 struct btrfs_path *path, u64 dir,
2786 const char *name, u16 name_len,
2788 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2789 struct btrfs_path *path,
2794 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2795 struct btrfs_root *root, u64 offset);
2796 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2797 struct btrfs_root *root, u64 offset);
2798 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2801 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2802 struct btrfs_root *root,
2803 const char *name, int name_len,
2804 u64 inode_objectid, u64 ref_objectid, u64 index);
2805 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2806 struct btrfs_root *root,
2807 const char *name, int name_len,
2808 u64 inode_objectid, u64 ref_objectid, u64 *index);
2809 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2810 struct btrfs_root *root,
2811 struct btrfs_path *path, u64 objectid);
2812 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2813 *root, struct btrfs_path *path,
2814 struct btrfs_key *location, int mod);
2816 struct btrfs_inode_extref *
2817 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2818 struct btrfs_root *root,
2819 struct btrfs_path *path,
2820 const char *name, int name_len,
2821 u64 inode_objectid, u64 ref_objectid, int ins_len,
2824 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2825 int slot, const char *name,
2827 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2828 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2829 const char *name, int name_len);
2831 struct btrfs_dio_private;
2832 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2833 struct btrfs_root *root, u64 bytenr, u64 len);
2834 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2835 u64 offset, u8 *dst);
2836 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2837 struct btrfs_root *root,
2838 u64 objectid, u64 pos,
2839 u64 disk_offset, u64 disk_num_bytes,
2840 u64 num_bytes, u64 offset, u64 ram_bytes,
2841 u8 compression, u8 encryption, u16 other_encoding);
2842 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2843 struct btrfs_root *root,
2844 struct btrfs_path *path, u64 objectid,
2845 u64 bytenr, int mod);
2846 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2847 struct btrfs_root *root,
2848 struct btrfs_ordered_sum *sums);
2849 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2850 u64 file_start, int contig);
2851 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2852 struct list_head *list, int search_commit);
2853 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2854 const struct btrfs_path *path,
2855 struct btrfs_file_extent_item *fi,
2856 const bool new_inline,
2857 struct extent_map *em);
2860 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2861 u64 start, u64 len);
2862 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2863 u64 *orig_start, u64 *orig_block_len,
2866 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2867 struct btrfs_inode *inode);
2868 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2869 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2870 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root,
2872 struct btrfs_inode *dir, struct btrfs_inode *inode,
2873 const char *name, int name_len);
2874 int btrfs_add_link(struct btrfs_trans_handle *trans,
2875 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2876 const char *name, int name_len, int add_backref, u64 index);
2877 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2878 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2880 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2881 struct btrfs_root *root,
2882 struct inode *inode, u64 new_size,
2885 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2886 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2887 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2888 unsigned int extra_bits,
2889 struct extent_state **cached_state);
2890 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2891 struct btrfs_root *new_root,
2892 struct btrfs_root *parent_root,
2894 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2896 void btrfs_clear_delalloc_extent(struct inode *inode,
2897 struct extent_state *state, unsigned *bits);
2898 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2899 struct extent_state *other);
2900 void btrfs_split_delalloc_extent(struct inode *inode,
2901 struct extent_state *orig, u64 split);
2902 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2903 unsigned long bio_flags);
2904 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2905 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2906 int btrfs_readpage(struct file *file, struct page *page);
2907 void btrfs_evict_inode(struct inode *inode);
2908 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2909 struct inode *btrfs_alloc_inode(struct super_block *sb);
2910 void btrfs_destroy_inode(struct inode *inode);
2911 void btrfs_free_inode(struct inode *inode);
2912 int btrfs_drop_inode(struct inode *inode);
2913 int __init btrfs_init_cachep(void);
2914 void __cold btrfs_destroy_cachep(void);
2915 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2916 struct btrfs_root *root, struct btrfs_path *path);
2917 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2918 struct btrfs_root *root);
2919 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2920 struct page *page, size_t pg_offset,
2921 u64 start, u64 end);
2922 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2923 struct btrfs_root *root,
2924 struct inode *inode);
2925 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2926 struct btrfs_root *root, struct inode *inode);
2927 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2928 struct btrfs_inode *inode);
2929 int btrfs_orphan_cleanup(struct btrfs_root *root);
2930 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2931 void btrfs_add_delayed_iput(struct inode *inode);
2932 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2933 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2934 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2935 u64 start, u64 num_bytes, u64 min_size,
2936 loff_t actual_len, u64 *alloc_hint);
2937 int btrfs_prealloc_file_range_trans(struct inode *inode,
2938 struct btrfs_trans_handle *trans, int mode,
2939 u64 start, u64 num_bytes, u64 min_size,
2940 loff_t actual_len, u64 *alloc_hint);
2941 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2942 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2943 struct writeback_control *wbc);
2944 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2945 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2946 u64 end, int uptodate);
2947 extern const struct dentry_operations btrfs_dentry_operations;
2950 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2951 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2952 int btrfs_ioctl_get_supported_features(void __user *arg);
2953 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2954 int __pure btrfs_is_empty_uuid(u8 *uuid);
2955 int btrfs_defrag_file(struct inode *inode, struct file *file,
2956 struct btrfs_ioctl_defrag_range_args *range,
2957 u64 newer_than, unsigned long max_pages);
2958 void btrfs_get_block_group_info(struct list_head *groups_list,
2959 struct btrfs_ioctl_space_info *space);
2960 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2961 struct btrfs_ioctl_balance_args *bargs);
2964 int __init btrfs_auto_defrag_init(void);
2965 void __cold btrfs_auto_defrag_exit(void);
2966 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2967 struct btrfs_inode *inode);
2968 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2969 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2970 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2971 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2973 extern const struct file_operations btrfs_file_operations;
2974 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2975 struct btrfs_root *root, struct inode *inode,
2976 struct btrfs_path *path, u64 start, u64 end,
2977 u64 *drop_end, int drop_cache,
2979 u32 extent_item_size,
2981 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2982 struct btrfs_root *root, struct inode *inode, u64 start,
2983 u64 end, int drop_cache);
2984 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2985 const u64 start, const u64 end,
2986 struct btrfs_clone_extent_info *clone_info,
2987 struct btrfs_trans_handle **trans_out);
2988 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2989 struct btrfs_inode *inode, u64 start, u64 end);
2990 int btrfs_release_file(struct inode *inode, struct file *file);
2991 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2992 size_t num_pages, loff_t pos, size_t write_bytes,
2993 struct extent_state **cached);
2994 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2995 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
2996 struct file *file_out, loff_t pos_out,
2997 loff_t len, unsigned int remap_flags);
3000 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3001 struct btrfs_root *root);
3004 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3005 unsigned long new_flags);
3006 int btrfs_sync_fs(struct super_block *sb, int wait);
3008 static inline __printf(2, 3) __cold
3009 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3013 #ifdef CONFIG_PRINTK
3016 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3018 #define btrfs_printk(fs_info, fmt, args...) \
3019 btrfs_no_printk(fs_info, fmt, ##args)
3022 #define btrfs_emerg(fs_info, fmt, args...) \
3023 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3024 #define btrfs_alert(fs_info, fmt, args...) \
3025 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3026 #define btrfs_crit(fs_info, fmt, args...) \
3027 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3028 #define btrfs_err(fs_info, fmt, args...) \
3029 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3030 #define btrfs_warn(fs_info, fmt, args...) \
3031 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3032 #define btrfs_notice(fs_info, fmt, args...) \
3033 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3034 #define btrfs_info(fs_info, fmt, args...) \
3035 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3038 * Wrappers that use printk_in_rcu
3040 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3041 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3042 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3043 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3044 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3045 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3046 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3047 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3048 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3049 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3050 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3051 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3052 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3053 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3056 * Wrappers that use a ratelimited printk_in_rcu
3058 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3059 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3060 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3061 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3062 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3063 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3064 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3065 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3066 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3067 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3068 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3069 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3070 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3071 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3074 * Wrappers that use a ratelimited printk
3076 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3077 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3078 #define btrfs_alert_rl(fs_info, fmt, args...) \
3079 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3080 #define btrfs_crit_rl(fs_info, fmt, args...) \
3081 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3082 #define btrfs_err_rl(fs_info, fmt, args...) \
3083 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3084 #define btrfs_warn_rl(fs_info, fmt, args...) \
3085 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3086 #define btrfs_notice_rl(fs_info, fmt, args...) \
3087 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3088 #define btrfs_info_rl(fs_info, fmt, args...) \
3089 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3091 #if defined(CONFIG_DYNAMIC_DEBUG)
3092 #define btrfs_debug(fs_info, fmt, args...) \
3093 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3094 fs_info, KERN_DEBUG fmt, ##args)
3095 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3096 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3097 fs_info, KERN_DEBUG fmt, ##args)
3098 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3099 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3100 fs_info, KERN_DEBUG fmt, ##args)
3101 #define btrfs_debug_rl(fs_info, fmt, args...) \
3102 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3103 fs_info, KERN_DEBUG fmt, ##args)
3104 #elif defined(DEBUG)
3105 #define btrfs_debug(fs_info, fmt, args...) \
3106 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3107 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3108 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3109 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3110 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3111 #define btrfs_debug_rl(fs_info, fmt, args...) \
3112 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3114 #define btrfs_debug(fs_info, fmt, args...) \
3115 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3116 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3117 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3118 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3119 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3120 #define btrfs_debug_rl(fs_info, fmt, args...) \
3121 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3124 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3127 btrfs_printk(fs_info, fmt, ##args); \
3128 rcu_read_unlock(); \
3131 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3134 btrfs_no_printk(fs_info, fmt, ##args); \
3135 rcu_read_unlock(); \
3138 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3140 static DEFINE_RATELIMIT_STATE(_rs, \
3141 DEFAULT_RATELIMIT_INTERVAL, \
3142 DEFAULT_RATELIMIT_BURST); \
3143 if (__ratelimit(&_rs)) \
3144 btrfs_printk(fs_info, fmt, ##args); \
3147 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3150 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3151 rcu_read_unlock(); \
3155 static inline void assfail(const char *expr, const char *file, int line)
3157 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3158 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3163 #define ASSERT(expr) \
3164 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3167 * Use that for functions that are conditionally exported for sanity tests but
3170 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3171 #define EXPORT_FOR_TESTS static
3173 #define EXPORT_FOR_TESTS
3177 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3180 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3185 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3186 unsigned int line, int errno, const char *fmt, ...);
3188 const char * __attribute_const__ btrfs_decode_error(int errno);
3191 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3192 const char *function,
3193 unsigned int line, int errno);
3196 * Call btrfs_abort_transaction as early as possible when an error condition is
3197 * detected, that way the exact line number is reported.
3199 #define btrfs_abort_transaction(trans, errno) \
3201 /* Report first abort since mount */ \
3202 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3203 &((trans)->fs_info->fs_state))) { \
3204 if ((errno) != -EIO) { \
3205 WARN(1, KERN_DEBUG \
3206 "BTRFS: Transaction aborted (error %d)\n", \
3209 btrfs_debug((trans)->fs_info, \
3210 "Transaction aborted (error %d)", \
3214 __btrfs_abort_transaction((trans), __func__, \
3215 __LINE__, (errno)); \
3218 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3220 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3221 (errno), fmt, ##args); \
3226 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3227 unsigned int line, int errno, const char *fmt, ...);
3229 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3230 * will panic(). Otherwise we BUG() here.
3232 #define btrfs_panic(fs_info, errno, fmt, args...) \
3234 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3239 /* compatibility and incompatibility defines */
3241 #define btrfs_set_fs_incompat(__fs_info, opt) \
3242 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3245 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3246 u64 flag, const char* name)
3248 struct btrfs_super_block *disk_super;
3251 disk_super = fs_info->super_copy;
3252 features = btrfs_super_incompat_flags(disk_super);
3253 if (!(features & flag)) {
3254 spin_lock(&fs_info->super_lock);
3255 features = btrfs_super_incompat_flags(disk_super);
3256 if (!(features & flag)) {
3258 btrfs_set_super_incompat_flags(disk_super, features);
3260 "setting incompat feature flag for %s (0x%llx)",
3263 spin_unlock(&fs_info->super_lock);
3267 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3268 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3271 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3272 u64 flag, const char* name)
3274 struct btrfs_super_block *disk_super;
3277 disk_super = fs_info->super_copy;
3278 features = btrfs_super_incompat_flags(disk_super);
3279 if (features & flag) {
3280 spin_lock(&fs_info->super_lock);
3281 features = btrfs_super_incompat_flags(disk_super);
3282 if (features & flag) {
3284 btrfs_set_super_incompat_flags(disk_super, features);
3286 "clearing incompat feature flag for %s (0x%llx)",
3289 spin_unlock(&fs_info->super_lock);
3293 #define btrfs_fs_incompat(fs_info, opt) \
3294 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3296 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3298 struct btrfs_super_block *disk_super;
3299 disk_super = fs_info->super_copy;
3300 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3303 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3304 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3307 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3308 u64 flag, const char *name)
3310 struct btrfs_super_block *disk_super;
3313 disk_super = fs_info->super_copy;
3314 features = btrfs_super_compat_ro_flags(disk_super);
3315 if (!(features & flag)) {
3316 spin_lock(&fs_info->super_lock);
3317 features = btrfs_super_compat_ro_flags(disk_super);
3318 if (!(features & flag)) {
3320 btrfs_set_super_compat_ro_flags(disk_super, features);
3322 "setting compat-ro feature flag for %s (0x%llx)",
3325 spin_unlock(&fs_info->super_lock);
3329 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3330 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3333 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3334 u64 flag, const char *name)
3336 struct btrfs_super_block *disk_super;
3339 disk_super = fs_info->super_copy;
3340 features = btrfs_super_compat_ro_flags(disk_super);
3341 if (features & flag) {
3342 spin_lock(&fs_info->super_lock);
3343 features = btrfs_super_compat_ro_flags(disk_super);
3344 if (features & flag) {
3346 btrfs_set_super_compat_ro_flags(disk_super, features);
3348 "clearing compat-ro feature flag for %s (0x%llx)",
3351 spin_unlock(&fs_info->super_lock);
3355 #define btrfs_fs_compat_ro(fs_info, opt) \
3356 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3358 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3360 struct btrfs_super_block *disk_super;
3361 disk_super = fs_info->super_copy;
3362 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3366 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3367 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3368 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3369 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3370 struct inode *inode, struct inode *dir);
3372 #define btrfs_get_acl NULL
3373 #define btrfs_set_acl NULL
3374 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3375 struct inode *inode, struct inode *dir)
3382 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3383 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3384 struct btrfs_root *root);
3385 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3386 struct btrfs_root *root);
3387 int btrfs_recover_relocation(struct btrfs_root *root);
3388 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3389 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3390 struct btrfs_root *root, struct extent_buffer *buf,
3391 struct extent_buffer *cow);
3392 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3393 u64 *bytes_to_reserve);
3394 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3395 struct btrfs_pending_snapshot *pending);
3398 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3399 u64 end, struct btrfs_scrub_progress *progress,
3400 int readonly, int is_dev_replace);
3401 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3402 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3403 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3404 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3405 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3406 struct btrfs_scrub_progress *progress);
3407 static inline void btrfs_init_full_stripe_locks_tree(
3408 struct btrfs_full_stripe_locks_tree *locks_root)
3410 locks_root->root = RB_ROOT;
3411 mutex_init(&locks_root->lock);
3415 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3416 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3417 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3419 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3421 btrfs_bio_counter_sub(fs_info, 1);
3425 struct reada_control {
3426 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3427 struct btrfs_key key_start;
3428 struct btrfs_key key_end; /* exclusive */
3431 wait_queue_head_t wait;
3433 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3434 struct btrfs_key *start, struct btrfs_key *end);
3435 int btrfs_reada_wait(void *handle);
3436 void btrfs_reada_detach(void *handle);
3437 int btree_readahead_hook(struct extent_buffer *eb, int err);
3439 static inline int is_fstree(u64 rootid)
3441 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3442 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3443 !btrfs_qgroup_level(rootid)))
3448 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3450 return signal_pending(current);
3453 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3455 /* Sanity test specific functions */
3456 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3457 void btrfs_test_inode_set_ops(struct inode *inode);
3458 void btrfs_test_destroy_inode(struct inode *inode);
3460 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3462 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3465 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)