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;
472 /* delayed seq elem */
474 struct list_head list;
478 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
480 #define SEQ_LAST ((u64)-1)
482 enum btrfs_orphan_cleanup_state {
483 ORPHAN_CLEANUP_STARTED = 1,
484 ORPHAN_CLEANUP_DONE = 2,
487 void btrfs_init_async_reclaim_work(struct work_struct *work);
490 struct reloc_control;
492 struct btrfs_fs_devices;
493 struct btrfs_balance_control;
494 struct btrfs_delayed_root;
497 * Block group or device which contains an active swapfile. Used for preventing
498 * unsafe operations while a swapfile is active.
500 * These are sorted on (ptr, inode) (note that a block group or device can
501 * contain more than one swapfile). We compare the pointer values because we
502 * don't actually care what the object is, we just need a quick check whether
503 * the object exists in the rbtree.
505 struct btrfs_swapfile_pin {
510 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
511 * points to a struct btrfs_device.
516 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
520 BTRFS_FS_CLOSING_START,
521 BTRFS_FS_CLOSING_DONE,
522 BTRFS_FS_LOG_RECOVERING,
524 BTRFS_FS_QUOTA_ENABLED,
525 BTRFS_FS_UPDATE_UUID_TREE_GEN,
526 BTRFS_FS_CREATING_FREE_SPACE_TREE,
530 BTRFS_FS_QUOTA_OVERRIDE,
531 /* Used to record internally whether fs has been frozen */
534 * Indicate that a whole-filesystem exclusive operation is running
535 * (device replace, resize, device add/delete, balance)
539 * To info transaction_kthread we need an immediate commit so it
540 * doesn't need to wait for commit_interval
542 BTRFS_FS_NEED_ASYNC_COMMIT,
544 * Indicate that balance has been set up from the ioctl and is in the
545 * main phase. The fs_info::balance_ctl is initialized.
546 * Set and cleared while holding fs_info::balance_mutex.
548 BTRFS_FS_BALANCE_RUNNING,
550 /* Indicate that the cleaner thread is awake and doing something. */
551 BTRFS_FS_CLEANER_RUNNING,
554 * The checksumming has an optimized version and is considered fast,
555 * so we don't need to offload checksums to workqueues.
557 BTRFS_FS_CSUM_IMPL_FAST,
559 /* Indicate that the discard workqueue can service discards. */
560 BTRFS_FS_DISCARD_RUNNING,
563 struct btrfs_fs_info {
564 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
566 struct btrfs_root *extent_root;
567 struct btrfs_root *tree_root;
568 struct btrfs_root *chunk_root;
569 struct btrfs_root *dev_root;
570 struct btrfs_root *fs_root;
571 struct btrfs_root *csum_root;
572 struct btrfs_root *quota_root;
573 struct btrfs_root *uuid_root;
574 struct btrfs_root *free_space_root;
576 /* the log root tree is a directory of all the other log roots */
577 struct btrfs_root *log_root_tree;
579 spinlock_t fs_roots_radix_lock;
580 struct radix_tree_root fs_roots_radix;
582 /* block group cache stuff */
583 spinlock_t block_group_cache_lock;
584 u64 first_logical_byte;
585 struct rb_root block_group_cache_tree;
587 /* keep track of unallocated space */
588 atomic64_t free_chunk_space;
590 struct extent_io_tree freed_extents[2];
591 struct extent_io_tree *pinned_extents;
593 /* logical->physical extent mapping */
594 struct extent_map_tree mapping_tree;
597 * block reservation for extent, checksum, root tree and
598 * delayed dir index item
600 struct btrfs_block_rsv global_block_rsv;
601 /* block reservation for metadata operations */
602 struct btrfs_block_rsv trans_block_rsv;
603 /* block reservation for chunk tree */
604 struct btrfs_block_rsv chunk_block_rsv;
605 /* block reservation for delayed operations */
606 struct btrfs_block_rsv delayed_block_rsv;
607 /* block reservation for delayed refs */
608 struct btrfs_block_rsv delayed_refs_rsv;
610 struct btrfs_block_rsv empty_block_rsv;
613 u64 last_trans_committed;
614 u64 avg_delayed_ref_runtime;
617 * this is updated to the current trans every time a full commit
618 * is required instead of the faster short fsync log commits
620 u64 last_trans_log_full_commit;
621 unsigned long mount_opt;
623 * Track requests for actions that need to be done during transaction
624 * commit (like for some mount options).
626 unsigned long pending_changes;
627 unsigned long compress_type:4;
628 unsigned int compress_level;
631 * It is a suggestive number, the read side is safe even it gets a
632 * wrong number because we will write out the data into a regular
633 * extent. The write side(mount/remount) is under ->s_umount lock,
634 * so it is also safe.
638 struct btrfs_transaction *running_transaction;
639 wait_queue_head_t transaction_throttle;
640 wait_queue_head_t transaction_wait;
641 wait_queue_head_t transaction_blocked_wait;
642 wait_queue_head_t async_submit_wait;
645 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
646 * when they are updated.
648 * Because we do not clear the flags for ever, so we needn't use
649 * the lock on the read side.
651 * We also needn't use the lock when we mount the fs, because
652 * there is no other task which will update the flag.
654 spinlock_t super_lock;
655 struct btrfs_super_block *super_copy;
656 struct btrfs_super_block *super_for_commit;
657 struct super_block *sb;
658 struct inode *btree_inode;
659 struct mutex tree_log_mutex;
660 struct mutex transaction_kthread_mutex;
661 struct mutex cleaner_mutex;
662 struct mutex chunk_mutex;
665 * this is taken to make sure we don't set block groups ro after
666 * the free space cache has been allocated on them
668 struct mutex ro_block_group_mutex;
670 /* this is used during read/modify/write to make sure
671 * no two ios are trying to mod the same stripe at the same
674 struct btrfs_stripe_hash_table *stripe_hash_table;
677 * this protects the ordered operations list only while we are
678 * processing all of the entries on it. This way we make
679 * sure the commit code doesn't find the list temporarily empty
680 * because another function happens to be doing non-waiting preflush
681 * before jumping into the main commit.
683 struct mutex ordered_operations_mutex;
685 struct rw_semaphore commit_root_sem;
687 struct rw_semaphore cleanup_work_sem;
689 struct rw_semaphore subvol_sem;
690 struct srcu_struct subvol_srcu;
692 spinlock_t trans_lock;
694 * the reloc mutex goes with the trans lock, it is taken
695 * during commit to protect us from the relocation code
697 struct mutex reloc_mutex;
699 struct list_head trans_list;
700 struct list_head dead_roots;
701 struct list_head caching_block_groups;
703 spinlock_t delayed_iput_lock;
704 struct list_head delayed_iputs;
705 atomic_t nr_delayed_iputs;
706 wait_queue_head_t delayed_iputs_wait;
708 /* this protects tree_mod_seq_list */
709 spinlock_t tree_mod_seq_lock;
710 atomic64_t tree_mod_seq;
711 struct list_head tree_mod_seq_list;
713 /* this protects tree_mod_log */
714 rwlock_t tree_mod_log_lock;
715 struct rb_root tree_mod_log;
717 atomic_t async_delalloc_pages;
720 * this is used to protect the following list -- ordered_roots.
722 spinlock_t ordered_root_lock;
725 * all fs/file tree roots in which there are data=ordered extents
726 * pending writeback are added into this list.
728 * these can span multiple transactions and basically include
729 * every dirty data page that isn't from nodatacow
731 struct list_head ordered_roots;
733 struct mutex delalloc_root_mutex;
734 spinlock_t delalloc_root_lock;
735 /* all fs/file tree roots that have delalloc inodes. */
736 struct list_head delalloc_roots;
739 * there is a pool of worker threads for checksumming during writes
740 * and a pool for checksumming after reads. This is because readers
741 * can run with FS locks held, and the writers may be waiting for
742 * those locks. We don't want ordering in the pending list to cause
743 * deadlocks, and so the two are serviced separately.
745 * A third pool does submit_bio to avoid deadlocking with the other
748 struct btrfs_workqueue *workers;
749 struct btrfs_workqueue *delalloc_workers;
750 struct btrfs_workqueue *flush_workers;
751 struct btrfs_workqueue *endio_workers;
752 struct btrfs_workqueue *endio_meta_workers;
753 struct btrfs_workqueue *endio_raid56_workers;
754 struct btrfs_workqueue *endio_repair_workers;
755 struct btrfs_workqueue *rmw_workers;
756 struct btrfs_workqueue *endio_meta_write_workers;
757 struct btrfs_workqueue *endio_write_workers;
758 struct btrfs_workqueue *endio_freespace_worker;
759 struct btrfs_workqueue *caching_workers;
760 struct btrfs_workqueue *readahead_workers;
763 * fixup workers take dirty pages that didn't properly go through
764 * the cow mechanism and make them safe to write. It happens
765 * for the sys_munmap function call path
767 struct btrfs_workqueue *fixup_workers;
768 struct btrfs_workqueue *delayed_workers;
770 struct task_struct *transaction_kthread;
771 struct task_struct *cleaner_kthread;
772 u32 thread_pool_size;
774 struct kobject *space_info_kobj;
778 /* used to keep from writing metadata until there is a nice batch */
779 struct percpu_counter dirty_metadata_bytes;
780 struct percpu_counter delalloc_bytes;
781 struct percpu_counter dio_bytes;
782 s32 dirty_metadata_batch;
785 struct list_head dirty_cowonly_roots;
787 struct btrfs_fs_devices *fs_devices;
790 * The space_info list is effectively read only after initial
791 * setup. It is populated at mount time and cleaned up after
792 * all block groups are removed. RCU is used to protect it.
794 struct list_head space_info;
796 struct btrfs_space_info *data_sinfo;
798 struct reloc_control *reloc_ctl;
800 /* data_alloc_cluster is only used in ssd_spread mode */
801 struct btrfs_free_cluster data_alloc_cluster;
803 /* all metadata allocations go through this cluster */
804 struct btrfs_free_cluster meta_alloc_cluster;
806 /* auto defrag inodes go here */
807 spinlock_t defrag_inodes_lock;
808 struct rb_root defrag_inodes;
809 atomic_t defrag_running;
811 /* Used to protect avail_{data, metadata, system}_alloc_bits */
812 seqlock_t profiles_lock;
814 * these three are in extended format (availability of single
815 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
816 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
818 u64 avail_data_alloc_bits;
819 u64 avail_metadata_alloc_bits;
820 u64 avail_system_alloc_bits;
822 /* restriper state */
823 spinlock_t balance_lock;
824 struct mutex balance_mutex;
825 atomic_t balance_pause_req;
826 atomic_t balance_cancel_req;
827 struct btrfs_balance_control *balance_ctl;
828 wait_queue_head_t balance_wait_q;
830 u32 data_chunk_allocations;
835 /* private scrub information */
836 struct mutex scrub_lock;
837 atomic_t scrubs_running;
838 atomic_t scrub_pause_req;
839 atomic_t scrubs_paused;
840 atomic_t scrub_cancel_req;
841 wait_queue_head_t scrub_pause_wait;
843 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
846 refcount_t scrub_workers_refcnt;
847 struct btrfs_workqueue *scrub_workers;
848 struct btrfs_workqueue *scrub_wr_completion_workers;
849 struct btrfs_workqueue *scrub_parity_workers;
851 struct btrfs_discard_ctl discard_ctl;
853 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
854 u32 check_integrity_print_mask;
856 /* is qgroup tracking in a consistent state? */
859 /* holds configuration and tracking. Protected by qgroup_lock */
860 struct rb_root qgroup_tree;
861 spinlock_t qgroup_lock;
864 * used to avoid frequently calling ulist_alloc()/ulist_free()
865 * when doing qgroup accounting, it must be protected by qgroup_lock.
867 struct ulist *qgroup_ulist;
869 /* protect user change for quota operations */
870 struct mutex qgroup_ioctl_lock;
872 /* list of dirty qgroups to be written at next commit */
873 struct list_head dirty_qgroups;
875 /* used by qgroup for an efficient tree traversal */
878 /* qgroup rescan items */
879 struct mutex qgroup_rescan_lock; /* protects the progress item */
880 struct btrfs_key qgroup_rescan_progress;
881 struct btrfs_workqueue *qgroup_rescan_workers;
882 struct completion qgroup_rescan_completion;
883 struct btrfs_work qgroup_rescan_work;
884 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
886 /* filesystem state */
887 unsigned long fs_state;
889 struct btrfs_delayed_root *delayed_root;
892 spinlock_t reada_lock;
893 struct radix_tree_root reada_tree;
895 /* readahead works cnt */
896 atomic_t reada_works_cnt;
898 /* Extent buffer radix tree */
899 spinlock_t buffer_lock;
900 struct radix_tree_root buffer_radix;
902 /* next backup root to be overwritten */
903 int backup_root_index;
905 /* device replace state */
906 struct btrfs_dev_replace dev_replace;
908 struct semaphore uuid_tree_rescan_sem;
910 /* Used to reclaim the metadata space in the background. */
911 struct work_struct async_reclaim_work;
913 spinlock_t unused_bgs_lock;
914 struct list_head unused_bgs;
915 struct mutex unused_bg_unpin_mutex;
916 struct mutex delete_unused_bgs_mutex;
918 /* Cached block sizes */
923 /* Block groups and devices containing active swapfiles. */
924 spinlock_t swapfile_pins_lock;
925 struct rb_root swapfile_pins;
927 struct crypto_shash *csum_shash;
930 * Number of send operations in progress.
931 * Updated while holding fs_info::balance_mutex.
933 int send_in_progress;
935 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
936 spinlock_t ref_verify_lock;
937 struct rb_root block_tree;
940 #ifdef CONFIG_BTRFS_DEBUG
941 struct kobject *debug_kobj;
942 struct kobject *discard_debug_kobj;
946 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
948 return sb->s_fs_info;
951 struct btrfs_subvolume_writers {
952 struct percpu_counter counter;
953 wait_queue_head_t wait;
957 * The state of btrfs root
961 * btrfs_record_root_in_trans is a multi-step process, and it can race
962 * with the balancing code. But the race is very small, and only the
963 * first time the root is added to each transaction. So IN_TRANS_SETUP
964 * is used to tell us when more checks are required
966 BTRFS_ROOT_IN_TRANS_SETUP,
968 BTRFS_ROOT_TRACK_DIRTY,
970 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
971 BTRFS_ROOT_DEFRAG_RUNNING,
972 BTRFS_ROOT_FORCE_COW,
973 BTRFS_ROOT_MULTI_LOG_TASKS,
978 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
980 * Set for the subvolume tree owning the reloc tree.
982 BTRFS_ROOT_DEAD_RELOC_TREE,
983 /* Mark dead root stored on device whose cleanup needs to be resumed */
984 BTRFS_ROOT_DEAD_TREE,
988 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
989 * code. For detail check comment in fs/btrfs/qgroup.c.
991 struct btrfs_qgroup_swapped_blocks {
993 /* RM_EMPTY_ROOT() of above blocks[] */
995 struct rb_root blocks[BTRFS_MAX_LEVEL];
999 * in ram representation of the tree. extent_root is used for all allocations
1000 * and for the extent tree extent_root root.
1003 struct extent_buffer *node;
1005 struct extent_buffer *commit_root;
1006 struct btrfs_root *log_root;
1007 struct btrfs_root *reloc_root;
1009 unsigned long state;
1010 struct btrfs_root_item root_item;
1011 struct btrfs_key root_key;
1012 struct btrfs_fs_info *fs_info;
1013 struct extent_io_tree dirty_log_pages;
1015 struct mutex objectid_mutex;
1017 spinlock_t accounting_lock;
1018 struct btrfs_block_rsv *block_rsv;
1020 /* free ino cache stuff */
1021 struct btrfs_free_space_ctl *free_ino_ctl;
1022 enum btrfs_caching_type ino_cache_state;
1023 spinlock_t ino_cache_lock;
1024 wait_queue_head_t ino_cache_wait;
1025 struct btrfs_free_space_ctl *free_ino_pinned;
1026 u64 ino_cache_progress;
1027 struct inode *ino_cache_inode;
1029 struct mutex log_mutex;
1030 wait_queue_head_t log_writer_wait;
1031 wait_queue_head_t log_commit_wait[2];
1032 struct list_head log_ctxs[2];
1033 atomic_t log_writers;
1034 atomic_t log_commit[2];
1037 /* No matter the commit succeeds or not*/
1038 int log_transid_committed;
1039 /* Just be updated when the commit succeeds. */
1040 int last_log_commit;
1041 pid_t log_start_pid;
1047 u64 highest_objectid;
1049 u64 defrag_trans_start;
1050 struct btrfs_key defrag_progress;
1051 struct btrfs_key defrag_max;
1053 /* the dirty list is only used by non-reference counted roots */
1054 struct list_head dirty_list;
1056 struct list_head root_list;
1058 spinlock_t log_extents_lock[2];
1059 struct list_head logged_list[2];
1061 int orphan_cleanup_state;
1063 spinlock_t inode_lock;
1064 /* red-black tree that keeps track of in-memory inodes */
1065 struct rb_root inode_tree;
1068 * radix tree that keeps track of delayed nodes of every inode,
1069 * protected by inode_lock
1071 struct radix_tree_root delayed_nodes_tree;
1073 * right now this just gets used so that a root has its own devid
1074 * for stat. It may be used for more later
1078 spinlock_t root_item_lock;
1081 struct mutex delalloc_mutex;
1082 spinlock_t delalloc_lock;
1084 * all of the inodes that have delalloc bytes. It is possible for
1085 * this list to be empty even when there is still dirty data=ordered
1086 * extents waiting to finish IO.
1088 struct list_head delalloc_inodes;
1089 struct list_head delalloc_root;
1090 u64 nr_delalloc_inodes;
1092 struct mutex ordered_extent_mutex;
1094 * this is used by the balancing code to wait for all the pending
1097 spinlock_t ordered_extent_lock;
1100 * all of the data=ordered extents pending writeback
1101 * these can span multiple transactions and basically include
1102 * every dirty data page that isn't from nodatacow
1104 struct list_head ordered_extents;
1105 struct list_head ordered_root;
1106 u64 nr_ordered_extents;
1109 * Not empty if this subvolume root has gone through tree block swap
1112 * Will be used by reloc_control::dirty_subvol_roots.
1114 struct list_head reloc_dirty_list;
1117 * Number of currently running SEND ioctls to prevent
1118 * manipulation with the read-only status via SUBVOL_SETFLAGS
1120 int send_in_progress;
1122 * Number of currently running deduplication operations that have a
1123 * destination inode belonging to this root. Protected by the lock
1126 int dedupe_in_progress;
1127 struct btrfs_subvolume_writers *subv_writers;
1128 atomic_t will_be_snapshotted;
1129 atomic_t snapshot_force_cow;
1131 /* For qgroup metadata reserved space */
1132 spinlock_t qgroup_meta_rsv_lock;
1133 u64 qgroup_meta_rsv_pertrans;
1134 u64 qgroup_meta_rsv_prealloc;
1136 /* Number of active swapfiles */
1137 atomic_t nr_swapfiles;
1139 /* Record pairs of swapped blocks for qgroup */
1140 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1142 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1147 struct btrfs_clone_extent_info {
1157 struct btrfs_file_private {
1161 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1163 return btrfs_sb(inode->i_sb)->sectorsize;
1166 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1169 return info->nodesize - sizeof(struct btrfs_header);
1172 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1174 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1176 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1179 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1181 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1184 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1185 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1186 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1188 return BTRFS_MAX_ITEM_SIZE(info) -
1189 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1192 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1194 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1198 * Flags for mount options.
1200 * Note: don't forget to add new options to btrfs_show_options()
1202 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1203 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1204 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1205 #define BTRFS_MOUNT_SSD (1 << 3)
1206 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1207 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1208 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1209 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1210 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1211 #define BTRFS_MOUNT_NOSSD (1 << 9)
1212 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1213 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1214 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1215 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1216 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1217 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1218 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1219 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1220 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1221 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1222 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1223 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1224 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1225 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1226 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1227 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1228 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1229 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1230 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1231 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1233 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1234 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1236 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1237 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1238 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1239 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1242 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1244 if (!btrfs_test_opt(fs_info, opt)) \
1245 btrfs_info(fs_info, fmt, ##args); \
1246 btrfs_set_opt(fs_info->mount_opt, opt); \
1249 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1251 if (btrfs_test_opt(fs_info, opt)) \
1252 btrfs_info(fs_info, fmt, ##args); \
1253 btrfs_clear_opt(fs_info->mount_opt, opt); \
1257 * Requests for changes that need to be done during transaction commit.
1259 * Internal mount options that are used for special handling of the real
1260 * mount options (eg. cannot be set during remount and have to be set during
1261 * transaction commit)
1264 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1265 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1266 #define BTRFS_PENDING_COMMIT (2)
1268 #define btrfs_test_pending(info, opt) \
1269 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1270 #define btrfs_set_pending(info, opt) \
1271 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1272 #define btrfs_clear_pending(info, opt) \
1273 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1276 * Helpers for setting pending mount option changes.
1278 * Expects corresponding macros
1279 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1281 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1283 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1284 btrfs_info((info), fmt, ##args); \
1285 btrfs_set_pending((info), SET_##opt); \
1286 btrfs_clear_pending((info), CLEAR_##opt); \
1290 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1292 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1293 btrfs_info((info), fmt, ##args); \
1294 btrfs_set_pending((info), CLEAR_##opt); \
1295 btrfs_clear_pending((info), SET_##opt); \
1302 #define BTRFS_INODE_NODATASUM (1 << 0)
1303 #define BTRFS_INODE_NODATACOW (1 << 1)
1304 #define BTRFS_INODE_READONLY (1 << 2)
1305 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1306 #define BTRFS_INODE_PREALLOC (1 << 4)
1307 #define BTRFS_INODE_SYNC (1 << 5)
1308 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1309 #define BTRFS_INODE_APPEND (1 << 7)
1310 #define BTRFS_INODE_NODUMP (1 << 8)
1311 #define BTRFS_INODE_NOATIME (1 << 9)
1312 #define BTRFS_INODE_DIRSYNC (1 << 10)
1313 #define BTRFS_INODE_COMPRESS (1 << 11)
1315 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1317 #define BTRFS_INODE_FLAG_MASK \
1318 (BTRFS_INODE_NODATASUM | \
1319 BTRFS_INODE_NODATACOW | \
1320 BTRFS_INODE_READONLY | \
1321 BTRFS_INODE_NOCOMPRESS | \
1322 BTRFS_INODE_PREALLOC | \
1323 BTRFS_INODE_SYNC | \
1324 BTRFS_INODE_IMMUTABLE | \
1325 BTRFS_INODE_APPEND | \
1326 BTRFS_INODE_NODUMP | \
1327 BTRFS_INODE_NOATIME | \
1328 BTRFS_INODE_DIRSYNC | \
1329 BTRFS_INODE_COMPRESS | \
1330 BTRFS_INODE_ROOT_ITEM_INIT)
1332 struct btrfs_map_token {
1333 const struct extent_buffer *eb;
1335 unsigned long offset;
1338 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1339 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1341 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1342 struct extent_buffer *eb)
1345 token->kaddr = NULL;
1348 /* some macros to generate set/get functions for the struct fields. This
1349 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1352 #define le8_to_cpu(v) (v)
1353 #define cpu_to_le8(v) (v)
1356 #define read_eb_member(eb, ptr, type, member, result) (\
1357 read_extent_buffer(eb, (char *)(result), \
1358 ((unsigned long)(ptr)) + \
1359 offsetof(type, member), \
1360 sizeof(((type *)0)->member)))
1362 #define write_eb_member(eb, ptr, type, member, result) (\
1363 write_extent_buffer(eb, (char *)(result), \
1364 ((unsigned long)(ptr)) + \
1365 offsetof(type, member), \
1366 sizeof(((type *)0)->member)))
1368 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1369 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1370 const void *ptr, unsigned long off, \
1371 struct btrfs_map_token *token); \
1372 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1373 unsigned long off, u##bits val, \
1374 struct btrfs_map_token *token); \
1375 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1376 const void *ptr, unsigned long off); \
1377 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1378 unsigned long off, u##bits val);
1380 DECLARE_BTRFS_SETGET_BITS(8)
1381 DECLARE_BTRFS_SETGET_BITS(16)
1382 DECLARE_BTRFS_SETGET_BITS(32)
1383 DECLARE_BTRFS_SETGET_BITS(64)
1385 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1386 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1389 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1390 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1392 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1395 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1396 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1398 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1400 struct btrfs_map_token *token) \
1402 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1403 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1405 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1406 type *s, u##bits val, \
1407 struct btrfs_map_token *token) \
1409 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1410 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1413 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1414 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1416 const type *p = page_address(eb->pages[0]); \
1417 u##bits res = le##bits##_to_cpu(p->member); \
1420 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1423 type *p = page_address(eb->pages[0]); \
1424 p->member = cpu_to_le##bits(val); \
1427 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1428 static inline u##bits btrfs_##name(const type *s) \
1430 return le##bits##_to_cpu(s->member); \
1432 static inline void btrfs_set_##name(type *s, u##bits val) \
1434 s->member = cpu_to_le##bits(val); \
1438 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1439 struct btrfs_dev_item *s)
1441 BUILD_BUG_ON(sizeof(u64) !=
1442 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1443 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1446 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1447 struct btrfs_dev_item *s,
1450 BUILD_BUG_ON(sizeof(u64) !=
1451 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1452 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1453 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1457 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1458 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1459 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1460 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1461 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1463 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1464 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1465 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1466 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1467 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1468 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1471 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1473 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1475 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1477 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1479 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1481 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1482 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1484 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1486 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1488 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1491 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1493 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1496 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1498 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1501 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1502 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1503 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1504 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1505 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1506 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1507 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1508 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1509 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1510 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1511 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1513 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1515 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1518 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1519 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1520 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1522 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1524 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1526 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1528 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1529 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1531 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1533 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1534 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1536 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1539 unsigned long offset = (unsigned long)c;
1540 offset += offsetof(struct btrfs_chunk, stripe);
1541 offset += nr * sizeof(struct btrfs_stripe);
1542 return (struct btrfs_stripe *)offset;
1545 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1547 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1550 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1551 struct btrfs_chunk *c, int nr)
1553 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1556 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1557 struct btrfs_chunk *c, int nr)
1559 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1562 /* struct btrfs_block_group_item */
1563 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1565 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1567 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1568 struct btrfs_block_group_item, chunk_objectid, 64);
1570 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1571 struct btrfs_block_group_item, chunk_objectid, 64);
1572 BTRFS_SETGET_FUNCS(block_group_flags,
1573 struct btrfs_block_group_item, flags, 64);
1574 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1575 struct btrfs_block_group_item, flags, 64);
1577 /* struct btrfs_free_space_info */
1578 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1580 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1582 /* struct btrfs_inode_ref */
1583 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1584 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1586 /* struct btrfs_inode_extref */
1587 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1588 parent_objectid, 64);
1589 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1591 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1593 /* struct btrfs_inode_item */
1594 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1595 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1596 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1597 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1598 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1599 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1600 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1601 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1602 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1603 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1604 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1605 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1606 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1608 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1610 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1612 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1613 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1615 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1617 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1618 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1619 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1621 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1623 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1624 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1625 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1626 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1628 /* struct btrfs_dev_extent */
1629 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1631 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1632 chunk_objectid, 64);
1633 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1635 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1637 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1639 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1640 return (unsigned long)dev + ptr;
1643 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1644 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1646 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1648 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1651 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1653 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1654 struct btrfs_tree_block_info *item,
1655 struct btrfs_disk_key *key)
1657 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1660 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1661 struct btrfs_tree_block_info *item,
1662 struct btrfs_disk_key *key)
1664 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1667 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1669 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1671 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1673 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1676 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1679 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1681 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1684 static inline u32 btrfs_extent_inline_ref_size(int type)
1686 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1687 type == BTRFS_SHARED_BLOCK_REF_KEY)
1688 return sizeof(struct btrfs_extent_inline_ref);
1689 if (type == BTRFS_SHARED_DATA_REF_KEY)
1690 return sizeof(struct btrfs_shared_data_ref) +
1691 sizeof(struct btrfs_extent_inline_ref);
1692 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1693 return sizeof(struct btrfs_extent_data_ref) +
1694 offsetof(struct btrfs_extent_inline_ref, offset);
1698 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1699 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1701 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1702 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1704 /* struct btrfs_node */
1705 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1706 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1707 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1709 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1712 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1715 ptr = offsetof(struct btrfs_node, ptrs) +
1716 sizeof(struct btrfs_key_ptr) * nr;
1717 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1720 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1724 ptr = offsetof(struct btrfs_node, ptrs) +
1725 sizeof(struct btrfs_key_ptr) * nr;
1726 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1729 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1732 ptr = offsetof(struct btrfs_node, ptrs) +
1733 sizeof(struct btrfs_key_ptr) * nr;
1734 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1737 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1741 ptr = offsetof(struct btrfs_node, ptrs) +
1742 sizeof(struct btrfs_key_ptr) * nr;
1743 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1746 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1748 return offsetof(struct btrfs_node, ptrs) +
1749 sizeof(struct btrfs_key_ptr) * nr;
1752 void btrfs_node_key(const struct extent_buffer *eb,
1753 struct btrfs_disk_key *disk_key, int nr);
1755 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1756 struct btrfs_disk_key *disk_key, int nr)
1759 ptr = btrfs_node_key_ptr_offset(nr);
1760 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1761 struct btrfs_key_ptr, key, disk_key);
1764 /* struct btrfs_item */
1765 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1766 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1767 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1768 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1770 static inline unsigned long btrfs_item_nr_offset(int nr)
1772 return offsetof(struct btrfs_leaf, items) +
1773 sizeof(struct btrfs_item) * nr;
1776 static inline struct btrfs_item *btrfs_item_nr(int nr)
1778 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1781 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1782 struct btrfs_item *item)
1784 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1787 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1789 return btrfs_item_end(eb, btrfs_item_nr(nr));
1792 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1794 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1797 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1799 return btrfs_item_size(eb, btrfs_item_nr(nr));
1802 static inline void btrfs_item_key(const struct extent_buffer *eb,
1803 struct btrfs_disk_key *disk_key, int nr)
1805 struct btrfs_item *item = btrfs_item_nr(nr);
1806 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1809 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1810 struct btrfs_disk_key *disk_key, int nr)
1812 struct btrfs_item *item = btrfs_item_nr(nr);
1813 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1816 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1819 * struct btrfs_root_ref
1821 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1822 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1823 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1825 /* struct btrfs_dir_item */
1826 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1827 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1828 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1829 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1830 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1831 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1833 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1835 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1838 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1839 const struct btrfs_dir_item *item,
1840 struct btrfs_disk_key *key)
1842 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1845 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1846 struct btrfs_dir_item *item,
1847 const struct btrfs_disk_key *key)
1849 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1852 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1854 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1856 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1859 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1860 const struct btrfs_free_space_header *h,
1861 struct btrfs_disk_key *key)
1863 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1866 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1867 struct btrfs_free_space_header *h,
1868 const struct btrfs_disk_key *key)
1870 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1873 /* struct btrfs_disk_key */
1874 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1876 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1877 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1879 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1880 const struct btrfs_disk_key *disk)
1882 cpu->offset = le64_to_cpu(disk->offset);
1883 cpu->type = disk->type;
1884 cpu->objectid = le64_to_cpu(disk->objectid);
1887 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1888 const struct btrfs_key *cpu)
1890 disk->offset = cpu_to_le64(cpu->offset);
1891 disk->type = cpu->type;
1892 disk->objectid = cpu_to_le64(cpu->objectid);
1895 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1896 struct btrfs_key *key, int nr)
1898 struct btrfs_disk_key disk_key;
1899 btrfs_node_key(eb, &disk_key, nr);
1900 btrfs_disk_key_to_cpu(key, &disk_key);
1903 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1904 struct btrfs_key *key, int nr)
1906 struct btrfs_disk_key disk_key;
1907 btrfs_item_key(eb, &disk_key, nr);
1908 btrfs_disk_key_to_cpu(key, &disk_key);
1911 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1912 const struct btrfs_dir_item *item,
1913 struct btrfs_key *key)
1915 struct btrfs_disk_key disk_key;
1916 btrfs_dir_item_key(eb, item, &disk_key);
1917 btrfs_disk_key_to_cpu(key, &disk_key);
1920 /* struct btrfs_header */
1921 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1922 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1924 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1925 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1926 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1927 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1928 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1930 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1931 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1933 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1935 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1937 return (btrfs_header_flags(eb) & flag) == flag;
1940 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1942 u64 flags = btrfs_header_flags(eb);
1943 btrfs_set_header_flags(eb, flags | flag);
1946 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1948 u64 flags = btrfs_header_flags(eb);
1949 btrfs_set_header_flags(eb, flags & ~flag);
1952 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1954 u64 flags = btrfs_header_flags(eb);
1955 return flags >> BTRFS_BACKREF_REV_SHIFT;
1958 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1961 u64 flags = btrfs_header_flags(eb);
1962 flags &= ~BTRFS_BACKREF_REV_MASK;
1963 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1964 btrfs_set_header_flags(eb, flags);
1967 static inline unsigned long btrfs_header_fsid(void)
1969 return offsetof(struct btrfs_header, fsid);
1972 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
1974 return offsetof(struct btrfs_header, chunk_tree_uuid);
1977 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1979 return btrfs_header_level(eb) == 0;
1982 /* struct btrfs_root_item */
1983 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1985 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1986 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1987 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1989 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1991 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1992 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1993 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1994 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1995 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1996 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1997 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1998 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2000 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2002 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2004 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2006 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2008 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2011 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2013 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2016 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2018 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2021 /* struct btrfs_root_backup */
2022 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2024 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2026 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2027 tree_root_level, 8);
2029 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2031 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2032 chunk_root_gen, 64);
2033 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2034 chunk_root_level, 8);
2036 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2038 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2039 extent_root_gen, 64);
2040 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2041 extent_root_level, 8);
2043 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2045 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2047 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2050 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2052 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2054 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2057 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2059 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2061 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2062 csum_root_level, 8);
2063 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2065 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2067 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2070 /* struct btrfs_balance_item */
2071 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2073 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2074 const struct btrfs_balance_item *bi,
2075 struct btrfs_disk_balance_args *ba)
2077 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2080 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2081 struct btrfs_balance_item *bi,
2082 const struct btrfs_disk_balance_args *ba)
2084 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2087 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2088 const struct btrfs_balance_item *bi,
2089 struct btrfs_disk_balance_args *ba)
2091 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2094 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2095 struct btrfs_balance_item *bi,
2096 const struct btrfs_disk_balance_args *ba)
2098 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2101 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2102 const struct btrfs_balance_item *bi,
2103 struct btrfs_disk_balance_args *ba)
2105 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2108 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2109 struct btrfs_balance_item *bi,
2110 const struct btrfs_disk_balance_args *ba)
2112 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2116 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2117 const struct btrfs_disk_balance_args *disk)
2119 memset(cpu, 0, sizeof(*cpu));
2121 cpu->profiles = le64_to_cpu(disk->profiles);
2122 cpu->usage = le64_to_cpu(disk->usage);
2123 cpu->devid = le64_to_cpu(disk->devid);
2124 cpu->pstart = le64_to_cpu(disk->pstart);
2125 cpu->pend = le64_to_cpu(disk->pend);
2126 cpu->vstart = le64_to_cpu(disk->vstart);
2127 cpu->vend = le64_to_cpu(disk->vend);
2128 cpu->target = le64_to_cpu(disk->target);
2129 cpu->flags = le64_to_cpu(disk->flags);
2130 cpu->limit = le64_to_cpu(disk->limit);
2131 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2132 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2136 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2137 const struct btrfs_balance_args *cpu)
2139 memset(disk, 0, sizeof(*disk));
2141 disk->profiles = cpu_to_le64(cpu->profiles);
2142 disk->usage = cpu_to_le64(cpu->usage);
2143 disk->devid = cpu_to_le64(cpu->devid);
2144 disk->pstart = cpu_to_le64(cpu->pstart);
2145 disk->pend = cpu_to_le64(cpu->pend);
2146 disk->vstart = cpu_to_le64(cpu->vstart);
2147 disk->vend = cpu_to_le64(cpu->vend);
2148 disk->target = cpu_to_le64(cpu->target);
2149 disk->flags = cpu_to_le64(cpu->flags);
2150 disk->limit = cpu_to_le64(cpu->limit);
2151 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2152 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2155 /* struct btrfs_super_block */
2156 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2157 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2158 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2160 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2161 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2162 struct btrfs_super_block, sys_chunk_array_size, 32);
2163 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2164 struct btrfs_super_block, chunk_root_generation, 64);
2165 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2167 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2169 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2170 chunk_root_level, 8);
2171 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2173 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2174 log_root_transid, 64);
2175 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2177 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2179 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2181 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2183 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2185 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2187 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2188 root_dir_objectid, 64);
2189 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2191 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2193 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2194 compat_ro_flags, 64);
2195 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2196 incompat_flags, 64);
2197 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2199 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2200 cache_generation, 64);
2201 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2202 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2203 uuid_tree_generation, 64);
2205 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2206 const char *btrfs_super_csum_name(u16 csum_type);
2207 const char *btrfs_super_csum_driver(u16 csum_type);
2208 size_t __const btrfs_get_num_csums(void);
2212 * The leaf data grows from end-to-front in the node.
2213 * this returns the address of the start of the last item,
2214 * which is the stop of the leaf data stack
2216 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2218 u32 nr = btrfs_header_nritems(leaf);
2221 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2222 return btrfs_item_offset_nr(leaf, nr - 1);
2225 /* struct btrfs_file_extent_item */
2226 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2227 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2228 struct btrfs_file_extent_item, disk_bytenr, 64);
2229 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2230 struct btrfs_file_extent_item, offset, 64);
2231 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2232 struct btrfs_file_extent_item, generation, 64);
2233 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2234 struct btrfs_file_extent_item, num_bytes, 64);
2235 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2236 struct btrfs_file_extent_item, disk_num_bytes, 64);
2237 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2238 struct btrfs_file_extent_item, compression, 8);
2240 static inline unsigned long
2241 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2243 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2246 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2248 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2251 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2253 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2255 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2256 disk_num_bytes, 64);
2257 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2259 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2261 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2263 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2265 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2267 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2268 other_encoding, 16);
2271 * this returns the number of bytes used by the item on disk, minus the
2272 * size of any extent headers. If a file is compressed on disk, this is
2273 * the compressed size
2275 static inline u32 btrfs_file_extent_inline_item_len(
2276 const struct extent_buffer *eb,
2277 struct btrfs_item *e)
2279 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2282 /* btrfs_qgroup_status_item */
2283 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2285 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2287 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2289 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2292 /* btrfs_qgroup_info_item */
2293 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2295 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2296 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2298 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2299 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2302 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2303 struct btrfs_qgroup_info_item, generation, 64);
2304 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2306 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2307 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2308 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2310 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2311 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2313 /* btrfs_qgroup_limit_item */
2314 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2316 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2318 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2320 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2322 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2325 /* btrfs_dev_replace_item */
2326 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2327 struct btrfs_dev_replace_item, src_devid, 64);
2328 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2329 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2331 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2333 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2335 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2337 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2338 num_write_errors, 64);
2339 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2340 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2342 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2344 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2347 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2348 struct btrfs_dev_replace_item, src_devid, 64);
2349 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2350 struct btrfs_dev_replace_item,
2351 cont_reading_from_srcdev_mode, 64);
2352 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2353 struct btrfs_dev_replace_item, replace_state, 64);
2354 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2355 struct btrfs_dev_replace_item, time_started, 64);
2356 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2357 struct btrfs_dev_replace_item, time_stopped, 64);
2358 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2359 struct btrfs_dev_replace_item, num_write_errors, 64);
2360 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2361 struct btrfs_dev_replace_item,
2362 num_uncorrectable_read_errors, 64);
2363 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2364 struct btrfs_dev_replace_item, cursor_left, 64);
2365 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2366 struct btrfs_dev_replace_item, cursor_right, 64);
2368 /* helper function to cast into the data area of the leaf. */
2369 #define btrfs_item_ptr(leaf, slot, type) \
2370 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2371 btrfs_item_offset_nr(leaf, slot)))
2373 #define btrfs_item_ptr_offset(leaf, slot) \
2374 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2375 btrfs_item_offset_nr(leaf, slot)))
2377 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2379 return crc32c(crc, address, length);
2382 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2384 put_unaligned_le32(~crc, result);
2387 static inline u64 btrfs_name_hash(const char *name, int len)
2389 return crc32c((u32)~1, name, len);
2393 * Figure the key offset of an extended inode ref
2395 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2398 return (u64) crc32c(parent_objectid, name, len);
2401 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2403 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2408 enum btrfs_inline_ref_type {
2409 BTRFS_REF_TYPE_INVALID,
2410 BTRFS_REF_TYPE_BLOCK,
2411 BTRFS_REF_TYPE_DATA,
2415 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2416 struct btrfs_extent_inline_ref *iref,
2417 enum btrfs_inline_ref_type is_data);
2418 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2420 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2423 * Use this if we would be adding new items, as we could split nodes as we cow
2426 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2429 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2433 * Doing a truncate or a modification won't result in new nodes or leaves, just
2434 * what we need for COW.
2436 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2439 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2442 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2443 u64 start, u64 num_bytes);
2444 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2445 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2446 unsigned long count);
2447 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2448 struct btrfs_delayed_ref_root *delayed_refs,
2449 struct btrfs_delayed_ref_head *head);
2450 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2451 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2452 struct btrfs_fs_info *fs_info, u64 bytenr,
2453 u64 offset, int metadata, u64 *refs, u64 *flags);
2454 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2455 u64 bytenr, u64 num, int reserved);
2456 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2457 u64 bytenr, u64 num_bytes);
2458 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2459 int btrfs_cross_ref_exist(struct btrfs_root *root,
2460 u64 objectid, u64 offset, u64 bytenr);
2461 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2462 struct btrfs_root *root,
2463 u64 parent, u64 root_objectid,
2464 const struct btrfs_disk_key *key,
2465 int level, u64 hint,
2467 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2468 struct btrfs_root *root,
2469 struct extent_buffer *buf,
2470 u64 parent, int last_ref);
2471 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2472 struct btrfs_root *root, u64 owner,
2473 u64 offset, u64 ram_bytes,
2474 struct btrfs_key *ins);
2475 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2476 u64 root_objectid, u64 owner, u64 offset,
2477 struct btrfs_key *ins);
2478 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2479 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2480 struct btrfs_key *ins, int is_data, int delalloc);
2481 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2482 struct extent_buffer *buf, int full_backref);
2483 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2484 struct extent_buffer *buf, int full_backref);
2485 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2486 u64 bytenr, u64 num_bytes, u64 flags,
2487 int level, int is_data);
2488 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2490 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2491 u64 start, u64 len, int delalloc);
2492 int btrfs_pin_reserved_extent(struct btrfs_fs_info *fs_info, u64 start,
2494 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2495 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2496 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2497 struct btrfs_ref *generic_ref);
2499 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2500 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache);
2501 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache);
2502 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2504 enum btrfs_reserve_flush_enum {
2505 /* If we are in the transaction, we can't flush anything.*/
2506 BTRFS_RESERVE_NO_FLUSH,
2508 * Flushing delalloc may cause deadlock somewhere, in this
2509 * case, use FLUSH LIMIT
2511 BTRFS_RESERVE_FLUSH_LIMIT,
2512 BTRFS_RESERVE_FLUSH_EVICT,
2513 BTRFS_RESERVE_FLUSH_ALL,
2516 enum btrfs_flush_state {
2517 FLUSH_DELAYED_ITEMS_NR = 1,
2518 FLUSH_DELAYED_ITEMS = 2,
2519 FLUSH_DELAYED_REFS_NR = 3,
2520 FLUSH_DELAYED_REFS = 4,
2522 FLUSH_DELALLOC_WAIT = 6,
2524 ALLOC_CHUNK_FORCE = 8,
2525 RUN_DELAYED_IPUTS = 9,
2529 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2530 struct btrfs_block_rsv *rsv,
2531 int nitems, bool use_global_rsv);
2532 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2533 struct btrfs_block_rsv *rsv);
2534 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2536 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2537 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2538 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2539 u64 start, u64 end);
2540 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2541 u64 num_bytes, u64 *actual_bytes);
2542 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2544 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2545 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2546 struct btrfs_fs_info *fs_info);
2547 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2548 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2549 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2552 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2553 int level, int *slot);
2554 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2555 int btrfs_previous_item(struct btrfs_root *root,
2556 struct btrfs_path *path, u64 min_objectid,
2558 int btrfs_previous_extent_item(struct btrfs_root *root,
2559 struct btrfs_path *path, u64 min_objectid);
2560 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2561 struct btrfs_path *path,
2562 const struct btrfs_key *new_key);
2563 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2564 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2565 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2566 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2567 struct btrfs_key *key, int lowest_level,
2569 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2570 struct btrfs_path *path,
2572 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2575 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2576 struct btrfs_root *root, struct extent_buffer *buf,
2577 struct extent_buffer *parent, int parent_slot,
2578 struct extent_buffer **cow_ret);
2579 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2580 struct btrfs_root *root,
2581 struct extent_buffer *buf,
2582 struct extent_buffer **cow_ret, u64 new_root_objectid);
2583 int btrfs_block_can_be_shared(struct btrfs_root *root,
2584 struct extent_buffer *buf);
2585 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2586 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2587 int btrfs_split_item(struct btrfs_trans_handle *trans,
2588 struct btrfs_root *root,
2589 struct btrfs_path *path,
2590 const struct btrfs_key *new_key,
2591 unsigned long split_offset);
2592 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2593 struct btrfs_root *root,
2594 struct btrfs_path *path,
2595 const struct btrfs_key *new_key);
2596 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2597 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2598 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2599 const struct btrfs_key *key, struct btrfs_path *p,
2600 int ins_len, int cow);
2601 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2602 struct btrfs_path *p, u64 time_seq);
2603 int btrfs_search_slot_for_read(struct btrfs_root *root,
2604 const struct btrfs_key *key,
2605 struct btrfs_path *p, int find_higher,
2607 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2608 struct btrfs_root *root, struct extent_buffer *parent,
2609 int start_slot, u64 *last_ret,
2610 struct btrfs_key *progress);
2611 void btrfs_release_path(struct btrfs_path *p);
2612 struct btrfs_path *btrfs_alloc_path(void);
2613 void btrfs_free_path(struct btrfs_path *p);
2615 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2616 struct btrfs_path *path, int slot, int nr);
2617 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2618 struct btrfs_root *root,
2619 struct btrfs_path *path)
2621 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2624 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2625 const struct btrfs_key *cpu_key, u32 *data_size,
2626 u32 total_data, u32 total_size, int nr);
2627 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2628 const struct btrfs_key *key, void *data, u32 data_size);
2629 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2630 struct btrfs_root *root,
2631 struct btrfs_path *path,
2632 const struct btrfs_key *cpu_key, u32 *data_size,
2635 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2636 struct btrfs_root *root,
2637 struct btrfs_path *path,
2638 const struct btrfs_key *key,
2641 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2644 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2645 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2646 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2648 static inline int btrfs_next_old_item(struct btrfs_root *root,
2649 struct btrfs_path *p, u64 time_seq)
2652 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2653 return btrfs_next_old_leaf(root, p, time_seq);
2656 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2658 return btrfs_next_old_item(root, p, 0);
2660 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2661 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2662 struct btrfs_block_rsv *block_rsv,
2663 int update_ref, int for_reloc);
2664 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2665 struct btrfs_root *root,
2666 struct extent_buffer *node,
2667 struct extent_buffer *parent);
2668 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2671 * Do it this way so we only ever do one test_bit in the normal case.
2673 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2674 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2682 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2683 * anything except sleeping. This function is used to check the status of
2686 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2688 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2691 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2693 kfree(fs_info->balance_ctl);
2694 kfree(fs_info->delayed_root);
2695 kfree(fs_info->extent_root);
2696 kfree(fs_info->tree_root);
2697 kfree(fs_info->chunk_root);
2698 kfree(fs_info->dev_root);
2699 kfree(fs_info->csum_root);
2700 kfree(fs_info->quota_root);
2701 kfree(fs_info->uuid_root);
2702 kfree(fs_info->free_space_root);
2703 kfree(fs_info->super_copy);
2704 kfree(fs_info->super_for_commit);
2708 /* tree mod log functions from ctree.c */
2709 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2710 struct seq_list *elem);
2711 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2712 struct seq_list *elem);
2713 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2716 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2717 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2719 int btrfs_del_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(struct btrfs_trans_handle *trans,
2723 const struct btrfs_key *key);
2724 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2725 const struct btrfs_key *key,
2726 struct btrfs_root_item *item);
2727 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2728 struct btrfs_root *root,
2729 struct btrfs_key *key,
2730 struct btrfs_root_item *item);
2731 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2732 struct btrfs_path *path, struct btrfs_root_item *root_item,
2733 struct btrfs_key *root_key);
2734 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2735 void btrfs_set_root_node(struct btrfs_root_item *item,
2736 struct extent_buffer *node);
2737 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2738 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2739 struct btrfs_root *root);
2742 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2744 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2746 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2747 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2751 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2752 const char *name, int name_len);
2753 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2754 int name_len, struct btrfs_inode *dir,
2755 struct btrfs_key *location, u8 type, u64 index);
2756 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root,
2758 struct btrfs_path *path, u64 dir,
2759 const char *name, int name_len,
2761 struct btrfs_dir_item *
2762 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2763 struct btrfs_root *root,
2764 struct btrfs_path *path, u64 dir,
2765 u64 objectid, const char *name, int name_len,
2767 struct btrfs_dir_item *
2768 btrfs_search_dir_index_item(struct btrfs_root *root,
2769 struct btrfs_path *path, u64 dirid,
2770 const char *name, int name_len);
2771 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2772 struct btrfs_root *root,
2773 struct btrfs_path *path,
2774 struct btrfs_dir_item *di);
2775 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2776 struct btrfs_root *root,
2777 struct btrfs_path *path, u64 objectid,
2778 const char *name, u16 name_len,
2779 const void *data, u16 data_len);
2780 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2781 struct btrfs_root *root,
2782 struct btrfs_path *path, u64 dir,
2783 const char *name, u16 name_len,
2785 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2786 struct btrfs_path *path,
2791 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2792 struct btrfs_root *root, u64 offset);
2793 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2794 struct btrfs_root *root, u64 offset);
2795 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2798 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2799 struct btrfs_root *root,
2800 const char *name, int name_len,
2801 u64 inode_objectid, u64 ref_objectid, u64 index);
2802 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2803 struct btrfs_root *root,
2804 const char *name, int name_len,
2805 u64 inode_objectid, u64 ref_objectid, u64 *index);
2806 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2807 struct btrfs_root *root,
2808 struct btrfs_path *path, u64 objectid);
2809 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2810 *root, struct btrfs_path *path,
2811 struct btrfs_key *location, int mod);
2813 struct btrfs_inode_extref *
2814 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2815 struct btrfs_root *root,
2816 struct btrfs_path *path,
2817 const char *name, int name_len,
2818 u64 inode_objectid, u64 ref_objectid, int ins_len,
2821 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2822 int slot, const char *name,
2824 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2825 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2826 const char *name, int name_len);
2828 struct btrfs_dio_private;
2829 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2830 struct btrfs_root *root, u64 bytenr, u64 len);
2831 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2832 u64 offset, u8 *dst);
2833 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2834 struct btrfs_root *root,
2835 u64 objectid, u64 pos,
2836 u64 disk_offset, u64 disk_num_bytes,
2837 u64 num_bytes, u64 offset, u64 ram_bytes,
2838 u8 compression, u8 encryption, u16 other_encoding);
2839 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2840 struct btrfs_root *root,
2841 struct btrfs_path *path, u64 objectid,
2842 u64 bytenr, int mod);
2843 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2844 struct btrfs_root *root,
2845 struct btrfs_ordered_sum *sums);
2846 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2847 u64 file_start, int contig);
2848 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2849 struct list_head *list, int search_commit);
2850 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2851 const struct btrfs_path *path,
2852 struct btrfs_file_extent_item *fi,
2853 const bool new_inline,
2854 struct extent_map *em);
2857 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2858 u64 start, u64 len);
2859 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2860 u64 *orig_start, u64 *orig_block_len,
2863 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2864 struct btrfs_inode *inode);
2865 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2866 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2867 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2868 struct btrfs_root *root,
2869 struct btrfs_inode *dir, struct btrfs_inode *inode,
2870 const char *name, int name_len);
2871 int btrfs_add_link(struct btrfs_trans_handle *trans,
2872 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2873 const char *name, int name_len, int add_backref, u64 index);
2874 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2875 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2877 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2878 struct btrfs_root *root,
2879 struct inode *inode, u64 new_size,
2882 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2883 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2884 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2885 unsigned int extra_bits,
2886 struct extent_state **cached_state);
2887 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2888 struct btrfs_root *new_root,
2889 struct btrfs_root *parent_root,
2891 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2893 void btrfs_clear_delalloc_extent(struct inode *inode,
2894 struct extent_state *state, unsigned *bits);
2895 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2896 struct extent_state *other);
2897 void btrfs_split_delalloc_extent(struct inode *inode,
2898 struct extent_state *orig, u64 split);
2899 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2900 unsigned long bio_flags);
2901 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2902 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2903 int btrfs_readpage(struct file *file, struct page *page);
2904 void btrfs_evict_inode(struct inode *inode);
2905 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2906 struct inode *btrfs_alloc_inode(struct super_block *sb);
2907 void btrfs_destroy_inode(struct inode *inode);
2908 void btrfs_free_inode(struct inode *inode);
2909 int btrfs_drop_inode(struct inode *inode);
2910 int __init btrfs_init_cachep(void);
2911 void __cold btrfs_destroy_cachep(void);
2912 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2913 struct btrfs_root *root, struct btrfs_path *path);
2914 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2915 struct btrfs_root *root);
2916 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2917 struct page *page, size_t pg_offset,
2918 u64 start, u64 end);
2919 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2920 struct btrfs_root *root,
2921 struct inode *inode);
2922 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2923 struct btrfs_root *root, struct inode *inode);
2924 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2925 struct btrfs_inode *inode);
2926 int btrfs_orphan_cleanup(struct btrfs_root *root);
2927 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2928 void btrfs_add_delayed_iput(struct inode *inode);
2929 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2930 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2931 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2932 u64 start, u64 num_bytes, u64 min_size,
2933 loff_t actual_len, u64 *alloc_hint);
2934 int btrfs_prealloc_file_range_trans(struct inode *inode,
2935 struct btrfs_trans_handle *trans, int mode,
2936 u64 start, u64 num_bytes, u64 min_size,
2937 loff_t actual_len, u64 *alloc_hint);
2938 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2939 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2940 struct writeback_control *wbc);
2941 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2942 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2943 u64 end, int uptodate);
2944 extern const struct dentry_operations btrfs_dentry_operations;
2947 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2948 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2949 int btrfs_ioctl_get_supported_features(void __user *arg);
2950 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2951 int __pure btrfs_is_empty_uuid(u8 *uuid);
2952 int btrfs_defrag_file(struct inode *inode, struct file *file,
2953 struct btrfs_ioctl_defrag_range_args *range,
2954 u64 newer_than, unsigned long max_pages);
2955 void btrfs_get_block_group_info(struct list_head *groups_list,
2956 struct btrfs_ioctl_space_info *space);
2957 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2958 struct btrfs_ioctl_balance_args *bargs);
2961 int __init btrfs_auto_defrag_init(void);
2962 void __cold btrfs_auto_defrag_exit(void);
2963 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2964 struct btrfs_inode *inode);
2965 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2966 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2967 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2968 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2970 extern const struct file_operations btrfs_file_operations;
2971 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2972 struct btrfs_root *root, struct inode *inode,
2973 struct btrfs_path *path, u64 start, u64 end,
2974 u64 *drop_end, int drop_cache,
2976 u32 extent_item_size,
2978 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2979 struct btrfs_root *root, struct inode *inode, u64 start,
2980 u64 end, int drop_cache);
2981 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2982 const u64 start, const u64 end,
2983 struct btrfs_clone_extent_info *clone_info,
2984 struct btrfs_trans_handle **trans_out);
2985 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2986 struct btrfs_inode *inode, u64 start, u64 end);
2987 int btrfs_release_file(struct inode *inode, struct file *file);
2988 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2989 size_t num_pages, loff_t pos, size_t write_bytes,
2990 struct extent_state **cached);
2991 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2992 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
2993 struct file *file_out, loff_t pos_out,
2994 loff_t len, unsigned int remap_flags);
2997 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2998 struct btrfs_root *root);
3001 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3002 unsigned long new_flags);
3003 int btrfs_sync_fs(struct super_block *sb, int wait);
3005 static inline __printf(2, 3) __cold
3006 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3010 #ifdef CONFIG_PRINTK
3013 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3015 #define btrfs_printk(fs_info, fmt, args...) \
3016 btrfs_no_printk(fs_info, fmt, ##args)
3019 #define btrfs_emerg(fs_info, fmt, args...) \
3020 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3021 #define btrfs_alert(fs_info, fmt, args...) \
3022 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3023 #define btrfs_crit(fs_info, fmt, args...) \
3024 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3025 #define btrfs_err(fs_info, fmt, args...) \
3026 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3027 #define btrfs_warn(fs_info, fmt, args...) \
3028 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3029 #define btrfs_notice(fs_info, fmt, args...) \
3030 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3031 #define btrfs_info(fs_info, fmt, args...) \
3032 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3035 * Wrappers that use printk_in_rcu
3037 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3038 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3039 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3040 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3041 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3042 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3043 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3044 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3045 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3046 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3047 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3048 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3049 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3050 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3053 * Wrappers that use a ratelimited printk_in_rcu
3055 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3056 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3057 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3058 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3059 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3060 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3061 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3062 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3063 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3064 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3065 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3066 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3067 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3068 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3071 * Wrappers that use a ratelimited printk
3073 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3074 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3075 #define btrfs_alert_rl(fs_info, fmt, args...) \
3076 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3077 #define btrfs_crit_rl(fs_info, fmt, args...) \
3078 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3079 #define btrfs_err_rl(fs_info, fmt, args...) \
3080 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3081 #define btrfs_warn_rl(fs_info, fmt, args...) \
3082 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3083 #define btrfs_notice_rl(fs_info, fmt, args...) \
3084 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3085 #define btrfs_info_rl(fs_info, fmt, args...) \
3086 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3088 #if defined(CONFIG_DYNAMIC_DEBUG)
3089 #define btrfs_debug(fs_info, fmt, args...) \
3090 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3091 fs_info, KERN_DEBUG fmt, ##args)
3092 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3093 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3094 fs_info, KERN_DEBUG fmt, ##args)
3095 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3096 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3097 fs_info, KERN_DEBUG fmt, ##args)
3098 #define btrfs_debug_rl(fs_info, fmt, args...) \
3099 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3100 fs_info, KERN_DEBUG fmt, ##args)
3101 #elif defined(DEBUG)
3102 #define btrfs_debug(fs_info, fmt, args...) \
3103 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3104 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3105 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3106 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3107 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3108 #define btrfs_debug_rl(fs_info, fmt, args...) \
3109 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3111 #define btrfs_debug(fs_info, fmt, args...) \
3112 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3113 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3114 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3115 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3116 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3117 #define btrfs_debug_rl(fs_info, fmt, args...) \
3118 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3121 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3124 btrfs_printk(fs_info, fmt, ##args); \
3125 rcu_read_unlock(); \
3128 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3131 btrfs_no_printk(fs_info, fmt, ##args); \
3132 rcu_read_unlock(); \
3135 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3137 static DEFINE_RATELIMIT_STATE(_rs, \
3138 DEFAULT_RATELIMIT_INTERVAL, \
3139 DEFAULT_RATELIMIT_BURST); \
3140 if (__ratelimit(&_rs)) \
3141 btrfs_printk(fs_info, fmt, ##args); \
3144 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3147 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3148 rcu_read_unlock(); \
3152 static inline void assfail(const char *expr, const char *file, int line)
3154 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3155 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3160 #define ASSERT(expr) \
3161 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3164 * Use that for functions that are conditionally exported for sanity tests but
3167 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3168 #define EXPORT_FOR_TESTS static
3170 #define EXPORT_FOR_TESTS
3174 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3177 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3182 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3183 unsigned int line, int errno, const char *fmt, ...);
3185 const char * __attribute_const__ btrfs_decode_error(int errno);
3188 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3189 const char *function,
3190 unsigned int line, int errno);
3193 * Call btrfs_abort_transaction as early as possible when an error condition is
3194 * detected, that way the exact line number is reported.
3196 #define btrfs_abort_transaction(trans, errno) \
3198 /* Report first abort since mount */ \
3199 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3200 &((trans)->fs_info->fs_state))) { \
3201 if ((errno) != -EIO) { \
3202 WARN(1, KERN_DEBUG \
3203 "BTRFS: Transaction aborted (error %d)\n", \
3206 btrfs_debug((trans)->fs_info, \
3207 "Transaction aborted (error %d)", \
3211 __btrfs_abort_transaction((trans), __func__, \
3212 __LINE__, (errno)); \
3215 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3217 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3218 (errno), fmt, ##args); \
3223 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3224 unsigned int line, int errno, const char *fmt, ...);
3226 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3227 * will panic(). Otherwise we BUG() here.
3229 #define btrfs_panic(fs_info, errno, fmt, args...) \
3231 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3236 /* compatibility and incompatibility defines */
3238 #define btrfs_set_fs_incompat(__fs_info, opt) \
3239 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3242 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3243 u64 flag, const char* name)
3245 struct btrfs_super_block *disk_super;
3248 disk_super = fs_info->super_copy;
3249 features = btrfs_super_incompat_flags(disk_super);
3250 if (!(features & flag)) {
3251 spin_lock(&fs_info->super_lock);
3252 features = btrfs_super_incompat_flags(disk_super);
3253 if (!(features & flag)) {
3255 btrfs_set_super_incompat_flags(disk_super, features);
3257 "setting incompat feature flag for %s (0x%llx)",
3260 spin_unlock(&fs_info->super_lock);
3264 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3265 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3268 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3269 u64 flag, const char* name)
3271 struct btrfs_super_block *disk_super;
3274 disk_super = fs_info->super_copy;
3275 features = btrfs_super_incompat_flags(disk_super);
3276 if (features & flag) {
3277 spin_lock(&fs_info->super_lock);
3278 features = btrfs_super_incompat_flags(disk_super);
3279 if (features & flag) {
3281 btrfs_set_super_incompat_flags(disk_super, features);
3283 "clearing incompat feature flag for %s (0x%llx)",
3286 spin_unlock(&fs_info->super_lock);
3290 #define btrfs_fs_incompat(fs_info, opt) \
3291 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3293 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3295 struct btrfs_super_block *disk_super;
3296 disk_super = fs_info->super_copy;
3297 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3300 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3301 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3304 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3305 u64 flag, const char *name)
3307 struct btrfs_super_block *disk_super;
3310 disk_super = fs_info->super_copy;
3311 features = btrfs_super_compat_ro_flags(disk_super);
3312 if (!(features & flag)) {
3313 spin_lock(&fs_info->super_lock);
3314 features = btrfs_super_compat_ro_flags(disk_super);
3315 if (!(features & flag)) {
3317 btrfs_set_super_compat_ro_flags(disk_super, features);
3319 "setting compat-ro feature flag for %s (0x%llx)",
3322 spin_unlock(&fs_info->super_lock);
3326 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3327 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3330 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3331 u64 flag, const char *name)
3333 struct btrfs_super_block *disk_super;
3336 disk_super = fs_info->super_copy;
3337 features = btrfs_super_compat_ro_flags(disk_super);
3338 if (features & flag) {
3339 spin_lock(&fs_info->super_lock);
3340 features = btrfs_super_compat_ro_flags(disk_super);
3341 if (features & flag) {
3343 btrfs_set_super_compat_ro_flags(disk_super, features);
3345 "clearing compat-ro feature flag for %s (0x%llx)",
3348 spin_unlock(&fs_info->super_lock);
3352 #define btrfs_fs_compat_ro(fs_info, opt) \
3353 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3355 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3357 struct btrfs_super_block *disk_super;
3358 disk_super = fs_info->super_copy;
3359 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3363 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3364 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3365 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3366 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3367 struct inode *inode, struct inode *dir);
3369 #define btrfs_get_acl NULL
3370 #define btrfs_set_acl NULL
3371 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3372 struct inode *inode, struct inode *dir)
3379 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3380 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3381 struct btrfs_root *root);
3382 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3383 struct btrfs_root *root);
3384 int btrfs_recover_relocation(struct btrfs_root *root);
3385 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3386 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3387 struct btrfs_root *root, struct extent_buffer *buf,
3388 struct extent_buffer *cow);
3389 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3390 u64 *bytes_to_reserve);
3391 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3392 struct btrfs_pending_snapshot *pending);
3395 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3396 u64 end, struct btrfs_scrub_progress *progress,
3397 int readonly, int is_dev_replace);
3398 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3399 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3400 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3401 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3402 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3403 struct btrfs_scrub_progress *progress);
3404 static inline void btrfs_init_full_stripe_locks_tree(
3405 struct btrfs_full_stripe_locks_tree *locks_root)
3407 locks_root->root = RB_ROOT;
3408 mutex_init(&locks_root->lock);
3412 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3413 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3414 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3416 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3418 btrfs_bio_counter_sub(fs_info, 1);
3422 struct reada_control {
3423 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3424 struct btrfs_key key_start;
3425 struct btrfs_key key_end; /* exclusive */
3428 wait_queue_head_t wait;
3430 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3431 struct btrfs_key *start, struct btrfs_key *end);
3432 int btrfs_reada_wait(void *handle);
3433 void btrfs_reada_detach(void *handle);
3434 int btree_readahead_hook(struct extent_buffer *eb, int err);
3436 static inline int is_fstree(u64 rootid)
3438 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3439 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3440 !btrfs_qgroup_level(rootid)))
3445 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3447 return signal_pending(current);
3450 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3452 /* Sanity test specific functions */
3453 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3454 void btrfs_test_inode_set_ops(struct inode *inode);
3455 void btrfs_test_destroy_inode(struct inode *inode);
3457 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3459 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3462 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)