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 <linux/kobject.h>
20 #include <trace/events/btrfs.h>
21 #include <asm/kmap_types.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.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle;
36 struct btrfs_transaction;
37 struct btrfs_pending_snapshot;
38 extern struct kmem_cache *btrfs_trans_handle_cachep;
39 extern struct kmem_cache *btrfs_bit_radix_cachep;
40 extern struct kmem_cache *btrfs_path_cachep;
41 extern struct kmem_cache *btrfs_free_space_cachep;
42 struct btrfs_ordered_sum;
44 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
45 #define STATIC noinline
47 #define STATIC static noinline
50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
52 #define BTRFS_MAX_MIRRORS 3
54 #define BTRFS_MAX_LEVEL 8
56 #define BTRFS_OLDEST_GENERATION 0ULL
58 #define BTRFS_COMPAT_EXTENT_TREE_V0
61 * the max metadata block size. This limit is somewhat artificial,
62 * but the memmove costs go through the roof for larger blocks.
64 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
67 * we can actually store much bigger names, but lets not confuse the rest
70 #define BTRFS_NAME_LEN 255
73 * Theoretical limit is larger, but we keep this down to a sane
74 * value. That should limit greatly the possibility of collisions on
77 #define BTRFS_LINK_MAX 65535U
79 /* four bytes for CRC32 */
80 static const int btrfs_csum_sizes[] = { 4 };
82 #define BTRFS_EMPTY_DIR_SIZE 0
84 /* ioprio of readahead is set to idle */
85 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
87 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
89 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
93 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
95 static inline u32 count_max_extents(u64 size)
97 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
100 struct btrfs_mapping_tree {
101 struct extent_map_tree map_tree;
104 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
106 BUG_ON(num_stripes == 0);
107 return sizeof(struct btrfs_chunk) +
108 sizeof(struct btrfs_stripe) * (num_stripes - 1);
114 #define BTRFS_FS_STATE_ERROR 0
115 #define BTRFS_FS_STATE_REMOUNTING 1
116 #define BTRFS_FS_STATE_TRANS_ABORTED 2
117 #define BTRFS_FS_STATE_DEV_REPLACING 3
118 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
120 #define BTRFS_BACKREF_REV_MAX 256
121 #define BTRFS_BACKREF_REV_SHIFT 56
122 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
123 BTRFS_BACKREF_REV_SHIFT)
125 #define BTRFS_OLD_BACKREF_REV 0
126 #define BTRFS_MIXED_BACKREF_REV 1
129 * every tree block (leaf or node) starts with this header.
131 struct btrfs_header {
132 /* these first four must match the super block */
133 u8 csum[BTRFS_CSUM_SIZE];
134 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
135 __le64 bytenr; /* which block this node is supposed to live in */
138 /* allowed to be different from the super from here on down */
139 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
144 } __attribute__ ((__packed__));
147 * this is a very generous portion of the super block, giving us
148 * room to translate 14 chunks with 3 stripes each.
150 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
153 * just in case we somehow lose the roots and are not able to mount,
154 * we store an array of the roots from previous transactions
157 #define BTRFS_NUM_BACKUP_ROOTS 4
158 struct btrfs_root_backup {
160 __le64 tree_root_gen;
163 __le64 chunk_root_gen;
166 __le64 extent_root_gen;
175 __le64 csum_root_gen;
185 u8 extent_root_level;
189 /* future and to align */
191 } __attribute__ ((__packed__));
194 * the super block basically lists the main trees of the FS
195 * it currently lacks any block count etc etc
197 struct btrfs_super_block {
198 u8 csum[BTRFS_CSUM_SIZE];
199 /* the first 4 fields must match struct btrfs_header */
200 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
201 __le64 bytenr; /* this block number */
204 /* allowed to be different from the btrfs_header from here own down */
211 /* this will help find the new super based on the log root */
212 __le64 log_root_transid;
215 __le64 root_dir_objectid;
219 __le32 __unused_leafsize;
221 __le32 sys_chunk_array_size;
222 __le64 chunk_root_generation;
224 __le64 compat_ro_flags;
225 __le64 incompat_flags;
230 struct btrfs_dev_item dev_item;
232 char label[BTRFS_LABEL_SIZE];
234 __le64 cache_generation;
235 __le64 uuid_tree_generation;
237 /* future expansion */
239 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
240 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
241 } __attribute__ ((__packed__));
244 * Compat flags that we support. If any incompat flags are set other than the
245 * ones specified below then we will fail to mount
247 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
248 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
249 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
251 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
252 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
253 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
255 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
256 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
258 #define BTRFS_FEATURE_INCOMPAT_SUPP \
259 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
260 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
261 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
262 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
263 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
264 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
265 BTRFS_FEATURE_INCOMPAT_RAID56 | \
266 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
267 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
268 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
270 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
271 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
272 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
275 * A leaf is full of items. offset and size tell us where to find
276 * the item in the leaf (relative to the start of the data area)
279 struct btrfs_disk_key key;
282 } __attribute__ ((__packed__));
285 * leaves have an item area and a data area:
286 * [item0, item1....itemN] [free space] [dataN...data1, data0]
288 * The data is separate from the items to get the keys closer together
292 struct btrfs_header header;
293 struct btrfs_item items[];
294 } __attribute__ ((__packed__));
297 * all non-leaf blocks are nodes, they hold only keys and pointers to
300 struct btrfs_key_ptr {
301 struct btrfs_disk_key key;
304 } __attribute__ ((__packed__));
307 struct btrfs_header header;
308 struct btrfs_key_ptr ptrs[];
309 } __attribute__ ((__packed__));
312 * btrfs_paths remember the path taken from the root down to the leaf.
313 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
314 * to any other levels that are present.
316 * The slots array records the index of the item or block pointer
317 * used while walking the tree.
319 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
321 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
322 int slots[BTRFS_MAX_LEVEL];
323 /* if there is real range locking, this locks field will change */
324 u8 locks[BTRFS_MAX_LEVEL];
326 /* keep some upper locks as we walk down */
330 * set by btrfs_split_item, tells search_slot to keep all locks
331 * and to force calls to keep space in the nodes
333 unsigned int search_for_split:1;
334 unsigned int keep_locks:1;
335 unsigned int skip_locking:1;
336 unsigned int leave_spinning:1;
337 unsigned int search_commit_root:1;
338 unsigned int need_commit_sem:1;
339 unsigned int skip_release_on_error:1;
341 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
342 sizeof(struct btrfs_item))
343 struct btrfs_dev_replace {
344 u64 replace_state; /* see #define above */
345 u64 time_started; /* seconds since 1-Jan-1970 */
346 u64 time_stopped; /* seconds since 1-Jan-1970 */
347 atomic64_t num_write_errors;
348 atomic64_t num_uncorrectable_read_errors;
351 u64 committed_cursor_left;
352 u64 cursor_left_last_write_of_item;
355 u64 cont_reading_from_srcdev_mode; /* see #define above */
358 int item_needs_writeback;
359 struct btrfs_device *srcdev;
360 struct btrfs_device *tgtdev;
363 atomic_t nesting_level;
364 struct mutex lock_finishing_cancel_unmount;
367 atomic_t blocking_readers;
368 wait_queue_head_t read_lock_wq;
370 struct btrfs_scrub_progress scrub_progress;
373 /* For raid type sysfs entries */
374 struct raid_kobject {
377 struct list_head list;
380 struct btrfs_space_info {
383 u64 total_bytes; /* total bytes in the space,
384 this doesn't take mirrors into account */
385 u64 bytes_used; /* total bytes used,
386 this doesn't take mirrors into account */
387 u64 bytes_pinned; /* total bytes pinned, will be freed when the
388 transaction finishes */
389 u64 bytes_reserved; /* total bytes the allocator has reserved for
390 current allocations */
391 u64 bytes_may_use; /* number of bytes that may be used for
392 delalloc/allocations */
393 u64 bytes_readonly; /* total bytes that are read only */
395 u64 max_extent_size; /* This will hold the maximum extent size of
396 the space info if we had an ENOSPC in the
399 unsigned int full:1; /* indicates that we cannot allocate any more
400 chunks for this space */
401 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
403 unsigned int flush:1; /* set if we are trying to make space */
405 unsigned int force_alloc; /* set if we need to force a chunk
406 alloc for this space */
408 u64 disk_used; /* total bytes used on disk */
409 u64 disk_total; /* total bytes on disk, takes mirrors into
415 * bytes_pinned is kept in line with what is actually pinned, as in
416 * we've called update_block_group and dropped the bytes_used counter
417 * and increased the bytes_pinned counter. However this means that
418 * bytes_pinned does not reflect the bytes that will be pinned once the
419 * delayed refs are flushed, so this counter is inc'ed every time we
420 * call btrfs_free_extent so it is a realtime count of what will be
421 * freed once the transaction is committed. It will be zeroed every
422 * time the transaction commits.
424 struct percpu_counter total_bytes_pinned;
426 struct list_head list;
427 /* Protected by the spinlock 'lock'. */
428 struct list_head ro_bgs;
429 struct list_head priority_tickets;
430 struct list_head tickets;
432 * tickets_id just indicates the next ticket will be handled, so note
433 * it's not stored per ticket.
437 struct rw_semaphore groups_sem;
438 /* for block groups in our same type */
439 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
440 wait_queue_head_t wait;
443 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
446 #define BTRFS_BLOCK_RSV_GLOBAL 1
447 #define BTRFS_BLOCK_RSV_DELALLOC 2
448 #define BTRFS_BLOCK_RSV_TRANS 3
449 #define BTRFS_BLOCK_RSV_CHUNK 4
450 #define BTRFS_BLOCK_RSV_DELOPS 5
451 #define BTRFS_BLOCK_RSV_EMPTY 6
452 #define BTRFS_BLOCK_RSV_TEMP 7
454 struct btrfs_block_rsv {
457 struct btrfs_space_info *space_info;
461 unsigned short failfast;
464 * Qgroup equivalent for @size @reserved
466 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
467 * about things like csum size nor how many tree blocks it will need to
470 * Qgroup cares more about net change of the extent usage.
472 * So for one newly inserted file extent, in worst case it will cause
473 * leaf split and level increase, nodesize for each file extent is
476 * In short, qgroup_size/reserved is the upper limit of possible needed
477 * qgroup metadata reservation.
480 u64 qgroup_rsv_reserved;
484 * free clusters are used to claim free space in relatively large chunks,
485 * allowing us to do less seeky writes. They are used for all metadata
486 * allocations. In ssd_spread mode they are also used for data allocations.
488 struct btrfs_free_cluster {
490 spinlock_t refill_lock;
493 /* largest extent in this cluster */
496 /* first extent starting offset */
499 /* We did a full search and couldn't create a cluster */
502 struct btrfs_block_group_cache *block_group;
504 * when a cluster is allocated from a block group, we put the
505 * cluster onto a list in the block group so that it can
506 * be freed before the block group is freed.
508 struct list_head block_group_list;
511 enum btrfs_caching_type {
513 BTRFS_CACHE_STARTED = 1,
514 BTRFS_CACHE_FAST = 2,
515 BTRFS_CACHE_FINISHED = 3,
516 BTRFS_CACHE_ERROR = 4,
519 enum btrfs_disk_cache_state {
520 BTRFS_DC_WRITTEN = 0,
526 struct btrfs_caching_control {
527 struct list_head list;
529 wait_queue_head_t wait;
530 struct btrfs_work work;
531 struct btrfs_block_group_cache *block_group;
536 /* Once caching_thread() finds this much free space, it will wake up waiters. */
537 #define CACHING_CTL_WAKE_UP SZ_2M
539 struct btrfs_io_ctl {
543 struct btrfs_fs_info *fs_info;
550 unsigned check_crcs:1;
554 * Tree to record all locked full stripes of a RAID5/6 block group
556 struct btrfs_full_stripe_locks_tree {
561 struct btrfs_block_group_cache {
562 struct btrfs_key key;
563 struct btrfs_block_group_item item;
564 struct btrfs_fs_info *fs_info;
572 u64 cache_generation;
575 * If the free space extent count exceeds this number, convert the block
578 u32 bitmap_high_thresh;
581 * If the free space extent count drops below this number, convert the
582 * block group back to extents.
584 u32 bitmap_low_thresh;
587 * It is just used for the delayed data space allocation because
588 * only the data space allocation and the relative metadata update
589 * can be done cross the transaction.
591 struct rw_semaphore data_rwsem;
593 /* for raid56, this is a full stripe, without parity */
594 unsigned long full_stripe_len;
598 unsigned int has_caching_ctl:1;
599 unsigned int removed:1;
601 int disk_cache_state;
603 /* cache tracking stuff */
605 struct btrfs_caching_control *caching_ctl;
606 u64 last_byte_to_unpin;
608 struct btrfs_space_info *space_info;
610 /* free space cache stuff */
611 struct btrfs_free_space_ctl *free_space_ctl;
613 /* block group cache stuff */
614 struct rb_node cache_node;
616 /* for block groups in the same raid type */
617 struct list_head list;
622 /* List of struct btrfs_free_clusters for this block group.
623 * Today it will only have one thing on it, but that may change
625 struct list_head cluster_list;
627 /* For delayed block group creation or deletion of empty block groups */
628 struct list_head bg_list;
630 /* For read-only block groups */
631 struct list_head ro_list;
635 /* For dirty block groups */
636 struct list_head dirty_list;
637 struct list_head io_list;
639 struct btrfs_io_ctl io_ctl;
642 * Incremented when doing extent allocations and holding a read lock
643 * on the space_info's groups_sem semaphore.
644 * Decremented when an ordered extent that represents an IO against this
645 * block group's range is created (after it's added to its inode's
646 * root's list of ordered extents) or immediately after the allocation
647 * if it's a metadata extent or fallocate extent (for these cases we
648 * don't create ordered extents).
650 atomic_t reservations;
653 * Incremented while holding the spinlock *lock* by a task checking if
654 * it can perform a nocow write (incremented if the value for the *ro*
655 * field is 0). Decremented by such tasks once they create an ordered
656 * extent or before that if some error happens before reaching that step.
657 * This is to prevent races between block group relocation and nocow
658 * writes through direct IO.
660 atomic_t nocow_writers;
662 /* Lock for free space tree operations. */
663 struct mutex free_space_lock;
666 * Does the block group need to be added to the free space tree?
667 * Protected by free_space_lock.
669 int needs_free_space;
671 /* Record locked full stripes for RAID5/6 block group */
672 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
675 /* delayed seq elem */
677 struct list_head list;
681 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
683 #define SEQ_LAST ((u64)-1)
685 enum btrfs_orphan_cleanup_state {
686 ORPHAN_CLEANUP_STARTED = 1,
687 ORPHAN_CLEANUP_DONE = 2,
690 /* used by the raid56 code to lock stripes for read/modify/write */
691 struct btrfs_stripe_hash {
692 struct list_head hash_list;
696 /* used by the raid56 code to lock stripes for read/modify/write */
697 struct btrfs_stripe_hash_table {
698 struct list_head stripe_cache;
699 spinlock_t cache_lock;
701 struct btrfs_stripe_hash table[];
704 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
706 void btrfs_init_async_reclaim_work(struct work_struct *work);
709 struct reloc_control;
711 struct btrfs_fs_devices;
712 struct btrfs_balance_control;
713 struct btrfs_delayed_root;
715 #define BTRFS_FS_BARRIER 1
716 #define BTRFS_FS_CLOSING_START 2
717 #define BTRFS_FS_CLOSING_DONE 3
718 #define BTRFS_FS_LOG_RECOVERING 4
719 #define BTRFS_FS_OPEN 5
720 #define BTRFS_FS_QUOTA_ENABLED 6
721 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
722 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
723 #define BTRFS_FS_BTREE_ERR 11
724 #define BTRFS_FS_LOG1_ERR 12
725 #define BTRFS_FS_LOG2_ERR 13
726 #define BTRFS_FS_QUOTA_OVERRIDE 14
727 /* Used to record internally whether fs has been frozen */
728 #define BTRFS_FS_FROZEN 15
731 * Indicate that a whole-filesystem exclusive operation is running
732 * (device replace, resize, device add/delete, balance)
734 #define BTRFS_FS_EXCL_OP 16
737 * To info transaction_kthread we need an immediate commit so it doesn't
738 * need to wait for commit_interval
740 #define BTRFS_FS_NEED_ASYNC_COMMIT 17
742 struct btrfs_fs_info {
743 u8 fsid[BTRFS_FSID_SIZE];
744 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
746 struct btrfs_root *extent_root;
747 struct btrfs_root *tree_root;
748 struct btrfs_root *chunk_root;
749 struct btrfs_root *dev_root;
750 struct btrfs_root *fs_root;
751 struct btrfs_root *csum_root;
752 struct btrfs_root *quota_root;
753 struct btrfs_root *uuid_root;
754 struct btrfs_root *free_space_root;
756 /* the log root tree is a directory of all the other log roots */
757 struct btrfs_root *log_root_tree;
759 spinlock_t fs_roots_radix_lock;
760 struct radix_tree_root fs_roots_radix;
762 /* block group cache stuff */
763 spinlock_t block_group_cache_lock;
764 u64 first_logical_byte;
765 struct rb_root block_group_cache_tree;
767 /* keep track of unallocated space */
768 atomic64_t free_chunk_space;
770 struct extent_io_tree freed_extents[2];
771 struct extent_io_tree *pinned_extents;
773 /* logical->physical extent mapping */
774 struct btrfs_mapping_tree mapping_tree;
777 * block reservation for extent, checksum, root tree and
778 * delayed dir index item
780 struct btrfs_block_rsv global_block_rsv;
781 /* block reservation for metadata operations */
782 struct btrfs_block_rsv trans_block_rsv;
783 /* block reservation for chunk tree */
784 struct btrfs_block_rsv chunk_block_rsv;
785 /* block reservation for delayed operations */
786 struct btrfs_block_rsv delayed_block_rsv;
788 struct btrfs_block_rsv empty_block_rsv;
791 u64 last_trans_committed;
792 u64 avg_delayed_ref_runtime;
795 * this is updated to the current trans every time a full commit
796 * is required instead of the faster short fsync log commits
798 u64 last_trans_log_full_commit;
799 unsigned long mount_opt;
801 * Track requests for actions that need to be done during transaction
802 * commit (like for some mount options).
804 unsigned long pending_changes;
805 unsigned long compress_type:4;
806 unsigned int compress_level;
809 * It is a suggestive number, the read side is safe even it gets a
810 * wrong number because we will write out the data into a regular
811 * extent. The write side(mount/remount) is under ->s_umount lock,
812 * so it is also safe.
816 struct btrfs_transaction *running_transaction;
817 wait_queue_head_t transaction_throttle;
818 wait_queue_head_t transaction_wait;
819 wait_queue_head_t transaction_blocked_wait;
820 wait_queue_head_t async_submit_wait;
823 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
824 * when they are updated.
826 * Because we do not clear the flags for ever, so we needn't use
827 * the lock on the read side.
829 * We also needn't use the lock when we mount the fs, because
830 * there is no other task which will update the flag.
832 spinlock_t super_lock;
833 struct btrfs_super_block *super_copy;
834 struct btrfs_super_block *super_for_commit;
835 struct super_block *sb;
836 struct inode *btree_inode;
837 struct mutex tree_log_mutex;
838 struct mutex transaction_kthread_mutex;
839 struct mutex cleaner_mutex;
840 struct mutex chunk_mutex;
841 struct mutex volume_mutex;
844 * this is taken to make sure we don't set block groups ro after
845 * the free space cache has been allocated on them
847 struct mutex ro_block_group_mutex;
849 /* this is used during read/modify/write to make sure
850 * no two ios are trying to mod the same stripe at the same
853 struct btrfs_stripe_hash_table *stripe_hash_table;
856 * this protects the ordered operations list only while we are
857 * processing all of the entries on it. This way we make
858 * sure the commit code doesn't find the list temporarily empty
859 * because another function happens to be doing non-waiting preflush
860 * before jumping into the main commit.
862 struct mutex ordered_operations_mutex;
864 struct rw_semaphore commit_root_sem;
866 struct rw_semaphore cleanup_work_sem;
868 struct rw_semaphore subvol_sem;
869 struct srcu_struct subvol_srcu;
871 spinlock_t trans_lock;
873 * the reloc mutex goes with the trans lock, it is taken
874 * during commit to protect us from the relocation code
876 struct mutex reloc_mutex;
878 struct list_head trans_list;
879 struct list_head dead_roots;
880 struct list_head caching_block_groups;
882 spinlock_t delayed_iput_lock;
883 struct list_head delayed_iputs;
884 struct mutex cleaner_delayed_iput_mutex;
886 /* this protects tree_mod_seq_list */
887 spinlock_t tree_mod_seq_lock;
888 atomic64_t tree_mod_seq;
889 struct list_head tree_mod_seq_list;
891 /* this protects tree_mod_log */
892 rwlock_t tree_mod_log_lock;
893 struct rb_root tree_mod_log;
895 atomic_t async_delalloc_pages;
898 * this is used to protect the following list -- ordered_roots.
900 spinlock_t ordered_root_lock;
903 * all fs/file tree roots in which there are data=ordered extents
904 * pending writeback are added into this list.
906 * these can span multiple transactions and basically include
907 * every dirty data page that isn't from nodatacow
909 struct list_head ordered_roots;
911 struct mutex delalloc_root_mutex;
912 spinlock_t delalloc_root_lock;
913 /* all fs/file tree roots that have delalloc inodes. */
914 struct list_head delalloc_roots;
917 * there is a pool of worker threads for checksumming during writes
918 * and a pool for checksumming after reads. This is because readers
919 * can run with FS locks held, and the writers may be waiting for
920 * those locks. We don't want ordering in the pending list to cause
921 * deadlocks, and so the two are serviced separately.
923 * A third pool does submit_bio to avoid deadlocking with the other
926 struct btrfs_workqueue *workers;
927 struct btrfs_workqueue *delalloc_workers;
928 struct btrfs_workqueue *flush_workers;
929 struct btrfs_workqueue *endio_workers;
930 struct btrfs_workqueue *endio_meta_workers;
931 struct btrfs_workqueue *endio_raid56_workers;
932 struct btrfs_workqueue *endio_repair_workers;
933 struct btrfs_workqueue *rmw_workers;
934 struct btrfs_workqueue *endio_meta_write_workers;
935 struct btrfs_workqueue *endio_write_workers;
936 struct btrfs_workqueue *endio_freespace_worker;
937 struct btrfs_workqueue *submit_workers;
938 struct btrfs_workqueue *caching_workers;
939 struct btrfs_workqueue *readahead_workers;
942 * fixup workers take dirty pages that didn't properly go through
943 * the cow mechanism and make them safe to write. It happens
944 * for the sys_munmap function call path
946 struct btrfs_workqueue *fixup_workers;
947 struct btrfs_workqueue *delayed_workers;
949 /* the extent workers do delayed refs on the extent allocation tree */
950 struct btrfs_workqueue *extent_workers;
951 struct task_struct *transaction_kthread;
952 struct task_struct *cleaner_kthread;
953 u32 thread_pool_size;
955 struct kobject *space_info_kobj;
956 struct list_head pending_raid_kobjs;
957 spinlock_t pending_raid_kobjs_lock; /* uncontended */
961 /* used to keep from writing metadata until there is a nice batch */
962 struct percpu_counter dirty_metadata_bytes;
963 struct percpu_counter delalloc_bytes;
964 s32 dirty_metadata_batch;
967 struct list_head dirty_cowonly_roots;
969 struct btrfs_fs_devices *fs_devices;
972 * The space_info list is effectively read only after initial
973 * setup. It is populated at mount time and cleaned up after
974 * all block groups are removed. RCU is used to protect it.
976 struct list_head space_info;
978 struct btrfs_space_info *data_sinfo;
980 struct reloc_control *reloc_ctl;
982 /* data_alloc_cluster is only used in ssd_spread mode */
983 struct btrfs_free_cluster data_alloc_cluster;
985 /* all metadata allocations go through this cluster */
986 struct btrfs_free_cluster meta_alloc_cluster;
988 /* auto defrag inodes go here */
989 spinlock_t defrag_inodes_lock;
990 struct rb_root defrag_inodes;
991 atomic_t defrag_running;
993 /* Used to protect avail_{data, metadata, system}_alloc_bits */
994 seqlock_t profiles_lock;
996 * these three are in extended format (availability of single
997 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
998 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1000 u64 avail_data_alloc_bits;
1001 u64 avail_metadata_alloc_bits;
1002 u64 avail_system_alloc_bits;
1004 /* restriper state */
1005 spinlock_t balance_lock;
1006 struct mutex balance_mutex;
1007 atomic_t balance_running;
1008 atomic_t balance_pause_req;
1009 atomic_t balance_cancel_req;
1010 struct btrfs_balance_control *balance_ctl;
1011 wait_queue_head_t balance_wait_q;
1013 u32 data_chunk_allocations;
1018 /* private scrub information */
1019 struct mutex scrub_lock;
1020 atomic_t scrubs_running;
1021 atomic_t scrub_pause_req;
1022 atomic_t scrubs_paused;
1023 atomic_t scrub_cancel_req;
1024 wait_queue_head_t scrub_pause_wait;
1025 int scrub_workers_refcnt;
1026 struct btrfs_workqueue *scrub_workers;
1027 struct btrfs_workqueue *scrub_wr_completion_workers;
1028 struct btrfs_workqueue *scrub_nocow_workers;
1029 struct btrfs_workqueue *scrub_parity_workers;
1031 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1032 u32 check_integrity_print_mask;
1034 /* is qgroup tracking in a consistent state? */
1037 /* holds configuration and tracking. Protected by qgroup_lock */
1038 struct rb_root qgroup_tree;
1039 struct rb_root qgroup_op_tree;
1040 spinlock_t qgroup_lock;
1041 spinlock_t qgroup_op_lock;
1042 atomic_t qgroup_op_seq;
1045 * used to avoid frequently calling ulist_alloc()/ulist_free()
1046 * when doing qgroup accounting, it must be protected by qgroup_lock.
1048 struct ulist *qgroup_ulist;
1050 /* protect user change for quota operations */
1051 struct mutex qgroup_ioctl_lock;
1053 /* list of dirty qgroups to be written at next commit */
1054 struct list_head dirty_qgroups;
1056 /* used by qgroup for an efficient tree traversal */
1059 /* qgroup rescan items */
1060 struct mutex qgroup_rescan_lock; /* protects the progress item */
1061 struct btrfs_key qgroup_rescan_progress;
1062 struct btrfs_workqueue *qgroup_rescan_workers;
1063 struct completion qgroup_rescan_completion;
1064 struct btrfs_work qgroup_rescan_work;
1065 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1067 /* filesystem state */
1068 unsigned long fs_state;
1070 struct btrfs_delayed_root *delayed_root;
1072 /* readahead tree */
1073 spinlock_t reada_lock;
1074 struct radix_tree_root reada_tree;
1076 /* readahead works cnt */
1077 atomic_t reada_works_cnt;
1079 /* Extent buffer radix tree */
1080 spinlock_t buffer_lock;
1081 struct radix_tree_root buffer_radix;
1083 /* next backup root to be overwritten */
1084 int backup_root_index;
1086 /* device replace state */
1087 struct btrfs_dev_replace dev_replace;
1089 struct percpu_counter bio_counter;
1090 wait_queue_head_t replace_wait;
1092 struct semaphore uuid_tree_rescan_sem;
1094 /* Used to reclaim the metadata space in the background. */
1095 struct work_struct async_reclaim_work;
1097 spinlock_t unused_bgs_lock;
1098 struct list_head unused_bgs;
1099 struct mutex unused_bg_unpin_mutex;
1100 struct mutex delete_unused_bgs_mutex;
1102 /* For btrfs to record security options */
1103 struct security_mnt_opts security_opts;
1106 * Chunks that can't be freed yet (under a trim/discard operation)
1107 * and will be latter freed. Protected by fs_info->chunk_mutex.
1109 struct list_head pinned_chunks;
1111 /* Cached block sizes */
1116 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1117 spinlock_t ref_verify_lock;
1118 struct rb_root block_tree;
1122 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1124 return sb->s_fs_info;
1127 struct btrfs_subvolume_writers {
1128 struct percpu_counter counter;
1129 wait_queue_head_t wait;
1133 * The state of btrfs root
1136 * btrfs_record_root_in_trans is a multi-step process,
1137 * and it can race with the balancing code. But the
1138 * race is very small, and only the first time the root
1139 * is added to each transaction. So IN_TRANS_SETUP
1140 * is used to tell us when more checks are required
1142 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1143 #define BTRFS_ROOT_REF_COWS 1
1144 #define BTRFS_ROOT_TRACK_DIRTY 2
1145 #define BTRFS_ROOT_IN_RADIX 3
1146 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1147 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1148 #define BTRFS_ROOT_FORCE_COW 6
1149 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1150 #define BTRFS_ROOT_DIRTY 8
1153 * in ram representation of the tree. extent_root is used for all allocations
1154 * and for the extent tree extent_root root.
1157 struct extent_buffer *node;
1159 struct extent_buffer *commit_root;
1160 struct btrfs_root *log_root;
1161 struct btrfs_root *reloc_root;
1163 unsigned long state;
1164 struct btrfs_root_item root_item;
1165 struct btrfs_key root_key;
1166 struct btrfs_fs_info *fs_info;
1167 struct extent_io_tree dirty_log_pages;
1169 struct mutex objectid_mutex;
1171 spinlock_t accounting_lock;
1172 struct btrfs_block_rsv *block_rsv;
1174 /* free ino cache stuff */
1175 struct btrfs_free_space_ctl *free_ino_ctl;
1176 enum btrfs_caching_type ino_cache_state;
1177 spinlock_t ino_cache_lock;
1178 wait_queue_head_t ino_cache_wait;
1179 struct btrfs_free_space_ctl *free_ino_pinned;
1180 u64 ino_cache_progress;
1181 struct inode *ino_cache_inode;
1183 struct mutex log_mutex;
1184 wait_queue_head_t log_writer_wait;
1185 wait_queue_head_t log_commit_wait[2];
1186 struct list_head log_ctxs[2];
1187 atomic_t log_writers;
1188 atomic_t log_commit[2];
1191 /* No matter the commit succeeds or not*/
1192 int log_transid_committed;
1193 /* Just be updated when the commit succeeds. */
1194 int last_log_commit;
1195 pid_t log_start_pid;
1202 u64 highest_objectid;
1204 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1205 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1209 u64 defrag_trans_start;
1210 struct btrfs_key defrag_progress;
1211 struct btrfs_key defrag_max;
1214 /* the dirty list is only used by non-reference counted roots */
1215 struct list_head dirty_list;
1217 struct list_head root_list;
1219 spinlock_t log_extents_lock[2];
1220 struct list_head logged_list[2];
1222 spinlock_t orphan_lock;
1223 atomic_t orphan_inodes;
1224 struct btrfs_block_rsv *orphan_block_rsv;
1225 int orphan_cleanup_state;
1227 spinlock_t inode_lock;
1228 /* red-black tree that keeps track of in-memory inodes */
1229 struct rb_root inode_tree;
1232 * radix tree that keeps track of delayed nodes of every inode,
1233 * protected by inode_lock
1235 struct radix_tree_root delayed_nodes_tree;
1237 * right now this just gets used so that a root has its own devid
1238 * for stat. It may be used for more later
1242 spinlock_t root_item_lock;
1245 struct mutex delalloc_mutex;
1246 spinlock_t delalloc_lock;
1248 * all of the inodes that have delalloc bytes. It is possible for
1249 * this list to be empty even when there is still dirty data=ordered
1250 * extents waiting to finish IO.
1252 struct list_head delalloc_inodes;
1253 struct list_head delalloc_root;
1254 u64 nr_delalloc_inodes;
1256 struct mutex ordered_extent_mutex;
1258 * this is used by the balancing code to wait for all the pending
1261 spinlock_t ordered_extent_lock;
1264 * all of the data=ordered extents pending writeback
1265 * these can span multiple transactions and basically include
1266 * every dirty data page that isn't from nodatacow
1268 struct list_head ordered_extents;
1269 struct list_head ordered_root;
1270 u64 nr_ordered_extents;
1273 * Number of currently running SEND ioctls to prevent
1274 * manipulation with the read-only status via SUBVOL_SETFLAGS
1276 int send_in_progress;
1277 struct btrfs_subvolume_writers *subv_writers;
1278 atomic_t will_be_snapshotted;
1280 /* For qgroup metadata reserved space */
1281 spinlock_t qgroup_meta_rsv_lock;
1282 u64 qgroup_meta_rsv_pertrans;
1283 u64 qgroup_meta_rsv_prealloc;
1286 struct btrfs_file_private {
1290 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1292 return btrfs_sb(inode->i_sb)->sectorsize;
1295 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1298 return info->nodesize - sizeof(struct btrfs_header);
1301 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1303 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1305 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1308 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1310 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1313 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1314 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1315 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1317 return BTRFS_MAX_ITEM_SIZE(info) -
1318 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1321 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1323 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1327 * Flags for mount options.
1329 * Note: don't forget to add new options to btrfs_show_options()
1331 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1332 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1333 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1334 #define BTRFS_MOUNT_SSD (1 << 3)
1335 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1336 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1337 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1338 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1339 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1340 #define BTRFS_MOUNT_NOSSD (1 << 9)
1341 #define BTRFS_MOUNT_DISCARD (1 << 10)
1342 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1343 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1344 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1345 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1346 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1347 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1348 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1349 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1350 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1351 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1352 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1353 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1354 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1355 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1356 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1357 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1358 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1359 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1361 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1362 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1364 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1365 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1366 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1367 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1370 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1372 if (!btrfs_test_opt(fs_info, opt)) \
1373 btrfs_info(fs_info, fmt, ##args); \
1374 btrfs_set_opt(fs_info->mount_opt, opt); \
1377 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1379 if (btrfs_test_opt(fs_info, opt)) \
1380 btrfs_info(fs_info, fmt, ##args); \
1381 btrfs_clear_opt(fs_info->mount_opt, opt); \
1384 #ifdef CONFIG_BTRFS_DEBUG
1386 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1388 struct btrfs_fs_info *fs_info = block_group->fs_info;
1390 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1391 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1392 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1393 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1398 * Requests for changes that need to be done during transaction commit.
1400 * Internal mount options that are used for special handling of the real
1401 * mount options (eg. cannot be set during remount and have to be set during
1402 * transaction commit)
1405 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1406 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1407 #define BTRFS_PENDING_COMMIT (2)
1409 #define btrfs_test_pending(info, opt) \
1410 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1411 #define btrfs_set_pending(info, opt) \
1412 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1413 #define btrfs_clear_pending(info, opt) \
1414 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1417 * Helpers for setting pending mount option changes.
1419 * Expects corresponding macros
1420 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1422 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1424 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1425 btrfs_info((info), fmt, ##args); \
1426 btrfs_set_pending((info), SET_##opt); \
1427 btrfs_clear_pending((info), CLEAR_##opt); \
1431 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1433 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1434 btrfs_info((info), fmt, ##args); \
1435 btrfs_set_pending((info), CLEAR_##opt); \
1436 btrfs_clear_pending((info), SET_##opt); \
1443 #define BTRFS_INODE_NODATASUM (1 << 0)
1444 #define BTRFS_INODE_NODATACOW (1 << 1)
1445 #define BTRFS_INODE_READONLY (1 << 2)
1446 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1447 #define BTRFS_INODE_PREALLOC (1 << 4)
1448 #define BTRFS_INODE_SYNC (1 << 5)
1449 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1450 #define BTRFS_INODE_APPEND (1 << 7)
1451 #define BTRFS_INODE_NODUMP (1 << 8)
1452 #define BTRFS_INODE_NOATIME (1 << 9)
1453 #define BTRFS_INODE_DIRSYNC (1 << 10)
1454 #define BTRFS_INODE_COMPRESS (1 << 11)
1456 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1458 struct btrfs_map_token {
1459 const struct extent_buffer *eb;
1461 unsigned long offset;
1464 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1465 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1467 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1469 token->kaddr = NULL;
1472 /* some macros to generate set/get functions for the struct fields. This
1473 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1476 #define le8_to_cpu(v) (v)
1477 #define cpu_to_le8(v) (v)
1480 #define read_eb_member(eb, ptr, type, member, result) (\
1481 read_extent_buffer(eb, (char *)(result), \
1482 ((unsigned long)(ptr)) + \
1483 offsetof(type, member), \
1484 sizeof(((type *)0)->member)))
1486 #define write_eb_member(eb, ptr, type, member, result) (\
1487 write_extent_buffer(eb, (char *)(result), \
1488 ((unsigned long)(ptr)) + \
1489 offsetof(type, member), \
1490 sizeof(((type *)0)->member)))
1492 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1493 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1494 const void *ptr, unsigned long off, \
1495 struct btrfs_map_token *token); \
1496 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1497 unsigned long off, u##bits val, \
1498 struct btrfs_map_token *token); \
1499 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1501 unsigned long off) \
1503 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1505 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1506 unsigned long off, u##bits val) \
1508 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1511 DECLARE_BTRFS_SETGET_BITS(8)
1512 DECLARE_BTRFS_SETGET_BITS(16)
1513 DECLARE_BTRFS_SETGET_BITS(32)
1514 DECLARE_BTRFS_SETGET_BITS(64)
1516 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1517 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1520 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1521 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1523 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1526 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1527 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1529 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1531 struct btrfs_map_token *token) \
1533 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1534 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1536 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1537 type *s, u##bits val, \
1538 struct btrfs_map_token *token) \
1540 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1541 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1544 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1545 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1547 const type *p = page_address(eb->pages[0]); \
1548 u##bits res = le##bits##_to_cpu(p->member); \
1551 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1554 type *p = page_address(eb->pages[0]); \
1555 p->member = cpu_to_le##bits(val); \
1558 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1559 static inline u##bits btrfs_##name(const type *s) \
1561 return le##bits##_to_cpu(s->member); \
1563 static inline void btrfs_set_##name(type *s, u##bits val) \
1565 s->member = cpu_to_le##bits(val); \
1569 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1570 struct btrfs_dev_item *s)
1572 BUILD_BUG_ON(sizeof(u64) !=
1573 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1574 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1577 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1578 struct btrfs_dev_item *s,
1581 BUILD_BUG_ON(sizeof(u64) !=
1582 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1583 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1584 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1588 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1589 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1590 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1591 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1592 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1594 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1595 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1596 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1597 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1598 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1599 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1601 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1602 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1604 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1606 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1608 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1610 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1612 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1613 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1615 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1617 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1619 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1622 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1624 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1627 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1629 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1632 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1633 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1634 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1635 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1636 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1637 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1638 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1639 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1640 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1641 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1642 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1644 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1646 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1649 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1650 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1651 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1659 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1660 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1662 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1664 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1665 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1667 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1670 unsigned long offset = (unsigned long)c;
1671 offset += offsetof(struct btrfs_chunk, stripe);
1672 offset += nr * sizeof(struct btrfs_stripe);
1673 return (struct btrfs_stripe *)offset;
1676 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1678 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1681 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1682 struct btrfs_chunk *c, int nr)
1684 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1687 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1688 struct btrfs_chunk *c, int nr)
1690 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1693 /* struct btrfs_block_group_item */
1694 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1696 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1698 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1699 struct btrfs_block_group_item, chunk_objectid, 64);
1701 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1702 struct btrfs_block_group_item, chunk_objectid, 64);
1703 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1704 struct btrfs_block_group_item, flags, 64);
1705 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1706 struct btrfs_block_group_item, flags, 64);
1708 /* struct btrfs_free_space_info */
1709 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1711 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1713 /* struct btrfs_inode_ref */
1714 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1715 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1717 /* struct btrfs_inode_extref */
1718 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1719 parent_objectid, 64);
1720 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1722 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1724 /* struct btrfs_inode_item */
1725 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1726 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1727 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1728 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1729 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1730 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1731 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1732 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1733 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1734 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1735 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1736 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1737 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1739 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1741 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1743 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1744 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1746 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1754 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1755 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1756 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1757 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1759 /* struct btrfs_dev_extent */
1760 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1762 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1763 chunk_objectid, 64);
1764 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1766 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1768 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1770 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1771 return (unsigned long)dev + ptr;
1774 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1775 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1777 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1779 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1782 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1784 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1785 struct btrfs_tree_block_info *item,
1786 struct btrfs_disk_key *key)
1788 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1791 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1792 struct btrfs_tree_block_info *item,
1793 struct btrfs_disk_key *key)
1795 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1798 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1800 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1802 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1804 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1807 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1810 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1812 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1815 static inline u32 btrfs_extent_inline_ref_size(int type)
1817 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1818 type == BTRFS_SHARED_BLOCK_REF_KEY)
1819 return sizeof(struct btrfs_extent_inline_ref);
1820 if (type == BTRFS_SHARED_DATA_REF_KEY)
1821 return sizeof(struct btrfs_shared_data_ref) +
1822 sizeof(struct btrfs_extent_inline_ref);
1823 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1824 return sizeof(struct btrfs_extent_data_ref) +
1825 offsetof(struct btrfs_extent_inline_ref, offset);
1829 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1830 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1832 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1833 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1835 /* struct btrfs_node */
1836 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1837 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1838 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1840 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1843 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1846 ptr = offsetof(struct btrfs_node, ptrs) +
1847 sizeof(struct btrfs_key_ptr) * nr;
1848 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1851 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1855 ptr = offsetof(struct btrfs_node, ptrs) +
1856 sizeof(struct btrfs_key_ptr) * nr;
1857 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1860 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1863 ptr = offsetof(struct btrfs_node, ptrs) +
1864 sizeof(struct btrfs_key_ptr) * nr;
1865 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1868 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1872 ptr = offsetof(struct btrfs_node, ptrs) +
1873 sizeof(struct btrfs_key_ptr) * nr;
1874 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1877 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1879 return offsetof(struct btrfs_node, ptrs) +
1880 sizeof(struct btrfs_key_ptr) * nr;
1883 void btrfs_node_key(const struct extent_buffer *eb,
1884 struct btrfs_disk_key *disk_key, int nr);
1886 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1887 struct btrfs_disk_key *disk_key, int nr)
1890 ptr = btrfs_node_key_ptr_offset(nr);
1891 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1892 struct btrfs_key_ptr, key, disk_key);
1895 /* struct btrfs_item */
1896 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1897 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1898 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1899 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1901 static inline unsigned long btrfs_item_nr_offset(int nr)
1903 return offsetof(struct btrfs_leaf, items) +
1904 sizeof(struct btrfs_item) * nr;
1907 static inline struct btrfs_item *btrfs_item_nr(int nr)
1909 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1912 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1913 struct btrfs_item *item)
1915 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1918 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1920 return btrfs_item_end(eb, btrfs_item_nr(nr));
1923 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1925 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1928 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1930 return btrfs_item_size(eb, btrfs_item_nr(nr));
1933 static inline void btrfs_item_key(const struct extent_buffer *eb,
1934 struct btrfs_disk_key *disk_key, int nr)
1936 struct btrfs_item *item = btrfs_item_nr(nr);
1937 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1940 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1941 struct btrfs_disk_key *disk_key, int nr)
1943 struct btrfs_item *item = btrfs_item_nr(nr);
1944 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1947 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1950 * struct btrfs_root_ref
1952 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1953 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1954 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1956 /* struct btrfs_dir_item */
1957 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1958 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1959 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1960 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1961 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1962 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1964 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1966 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1969 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1970 const struct btrfs_dir_item *item,
1971 struct btrfs_disk_key *key)
1973 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1976 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1977 struct btrfs_dir_item *item,
1978 const struct btrfs_disk_key *key)
1980 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1983 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1985 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1987 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1990 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1991 const struct btrfs_free_space_header *h,
1992 struct btrfs_disk_key *key)
1994 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1997 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1998 struct btrfs_free_space_header *h,
1999 const struct btrfs_disk_key *key)
2001 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2004 /* struct btrfs_disk_key */
2005 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2007 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2008 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2010 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2011 const struct btrfs_disk_key *disk)
2013 cpu->offset = le64_to_cpu(disk->offset);
2014 cpu->type = disk->type;
2015 cpu->objectid = le64_to_cpu(disk->objectid);
2018 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2019 const struct btrfs_key *cpu)
2021 disk->offset = cpu_to_le64(cpu->offset);
2022 disk->type = cpu->type;
2023 disk->objectid = cpu_to_le64(cpu->objectid);
2026 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2027 struct btrfs_key *key, int nr)
2029 struct btrfs_disk_key disk_key;
2030 btrfs_node_key(eb, &disk_key, nr);
2031 btrfs_disk_key_to_cpu(key, &disk_key);
2034 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2035 struct btrfs_key *key, int nr)
2037 struct btrfs_disk_key disk_key;
2038 btrfs_item_key(eb, &disk_key, nr);
2039 btrfs_disk_key_to_cpu(key, &disk_key);
2042 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2043 const struct btrfs_dir_item *item,
2044 struct btrfs_key *key)
2046 struct btrfs_disk_key disk_key;
2047 btrfs_dir_item_key(eb, item, &disk_key);
2048 btrfs_disk_key_to_cpu(key, &disk_key);
2051 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2056 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2061 /* struct btrfs_header */
2062 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2063 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2065 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2066 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2067 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2068 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2069 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2071 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2072 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2074 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2076 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2078 return (btrfs_header_flags(eb) & flag) == flag;
2081 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2083 u64 flags = btrfs_header_flags(eb);
2084 btrfs_set_header_flags(eb, flags | flag);
2085 return (flags & flag) == flag;
2088 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2090 u64 flags = btrfs_header_flags(eb);
2091 btrfs_set_header_flags(eb, flags & ~flag);
2092 return (flags & flag) == flag;
2095 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2097 u64 flags = btrfs_header_flags(eb);
2098 return flags >> BTRFS_BACKREF_REV_SHIFT;
2101 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2104 u64 flags = btrfs_header_flags(eb);
2105 flags &= ~BTRFS_BACKREF_REV_MASK;
2106 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2107 btrfs_set_header_flags(eb, flags);
2110 static inline unsigned long btrfs_header_fsid(void)
2112 return offsetof(struct btrfs_header, fsid);
2115 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2117 return offsetof(struct btrfs_header, chunk_tree_uuid);
2120 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2122 return btrfs_header_level(eb) == 0;
2125 /* struct btrfs_root_item */
2126 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2128 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2129 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2130 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2132 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2134 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2135 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2136 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2137 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2138 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2139 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2140 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2141 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2143 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2145 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2147 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2149 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2151 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2154 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2156 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2159 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2161 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2164 /* struct btrfs_root_backup */
2165 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2167 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2169 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2170 tree_root_level, 8);
2172 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2174 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2175 chunk_root_gen, 64);
2176 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2177 chunk_root_level, 8);
2179 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2181 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2182 extent_root_gen, 64);
2183 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2184 extent_root_level, 8);
2186 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2188 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2190 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2193 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2195 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2197 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2200 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2202 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2204 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2205 csum_root_level, 8);
2206 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2208 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2210 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2213 /* struct btrfs_balance_item */
2214 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2216 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2217 const struct btrfs_balance_item *bi,
2218 struct btrfs_disk_balance_args *ba)
2220 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2223 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2224 struct btrfs_balance_item *bi,
2225 const struct btrfs_disk_balance_args *ba)
2227 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2230 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2231 const struct btrfs_balance_item *bi,
2232 struct btrfs_disk_balance_args *ba)
2234 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2237 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2238 struct btrfs_balance_item *bi,
2239 const struct btrfs_disk_balance_args *ba)
2241 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2244 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2245 const struct btrfs_balance_item *bi,
2246 struct btrfs_disk_balance_args *ba)
2248 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2251 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2252 struct btrfs_balance_item *bi,
2253 const struct btrfs_disk_balance_args *ba)
2255 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2259 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2260 const struct btrfs_disk_balance_args *disk)
2262 memset(cpu, 0, sizeof(*cpu));
2264 cpu->profiles = le64_to_cpu(disk->profiles);
2265 cpu->usage = le64_to_cpu(disk->usage);
2266 cpu->devid = le64_to_cpu(disk->devid);
2267 cpu->pstart = le64_to_cpu(disk->pstart);
2268 cpu->pend = le64_to_cpu(disk->pend);
2269 cpu->vstart = le64_to_cpu(disk->vstart);
2270 cpu->vend = le64_to_cpu(disk->vend);
2271 cpu->target = le64_to_cpu(disk->target);
2272 cpu->flags = le64_to_cpu(disk->flags);
2273 cpu->limit = le64_to_cpu(disk->limit);
2274 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2275 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2279 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2280 const struct btrfs_balance_args *cpu)
2282 memset(disk, 0, sizeof(*disk));
2284 disk->profiles = cpu_to_le64(cpu->profiles);
2285 disk->usage = cpu_to_le64(cpu->usage);
2286 disk->devid = cpu_to_le64(cpu->devid);
2287 disk->pstart = cpu_to_le64(cpu->pstart);
2288 disk->pend = cpu_to_le64(cpu->pend);
2289 disk->vstart = cpu_to_le64(cpu->vstart);
2290 disk->vend = cpu_to_le64(cpu->vend);
2291 disk->target = cpu_to_le64(cpu->target);
2292 disk->flags = cpu_to_le64(cpu->flags);
2293 disk->limit = cpu_to_le64(cpu->limit);
2294 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2295 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2298 /* struct btrfs_super_block */
2299 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2300 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2301 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2303 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2304 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2305 struct btrfs_super_block, sys_chunk_array_size, 32);
2306 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2307 struct btrfs_super_block, chunk_root_generation, 64);
2308 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2310 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2312 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2313 chunk_root_level, 8);
2314 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2316 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2317 log_root_transid, 64);
2318 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2320 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2322 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2324 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2326 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2328 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2330 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2331 root_dir_objectid, 64);
2332 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2334 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2336 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2337 compat_ro_flags, 64);
2338 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2339 incompat_flags, 64);
2340 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2342 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2343 cache_generation, 64);
2344 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2345 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2346 uuid_tree_generation, 64);
2348 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2350 u16 t = btrfs_super_csum_type(s);
2352 * csum type is validated at mount time
2354 return btrfs_csum_sizes[t];
2359 * The leaf data grows from end-to-front in the node.
2360 * this returns the address of the start of the last item,
2361 * which is the stop of the leaf data stack
2363 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2364 const struct extent_buffer *leaf)
2366 u32 nr = btrfs_header_nritems(leaf);
2369 return BTRFS_LEAF_DATA_SIZE(fs_info);
2370 return btrfs_item_offset_nr(leaf, nr - 1);
2373 /* struct btrfs_file_extent_item */
2374 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2375 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2376 struct btrfs_file_extent_item, disk_bytenr, 64);
2377 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2378 struct btrfs_file_extent_item, offset, 64);
2379 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2380 struct btrfs_file_extent_item, generation, 64);
2381 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2382 struct btrfs_file_extent_item, num_bytes, 64);
2383 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2384 struct btrfs_file_extent_item, disk_num_bytes, 64);
2385 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2386 struct btrfs_file_extent_item, compression, 8);
2388 static inline unsigned long
2389 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2391 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2394 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2396 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2399 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2401 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2403 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2404 disk_num_bytes, 64);
2405 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2407 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2409 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2411 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2413 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2415 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2416 other_encoding, 16);
2419 * this returns the number of bytes used by the item on disk, minus the
2420 * size of any extent headers. If a file is compressed on disk, this is
2421 * the compressed size
2423 static inline u32 btrfs_file_extent_inline_item_len(
2424 const struct extent_buffer *eb,
2425 struct btrfs_item *e)
2427 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2430 /* this returns the number of file bytes represented by the inline item.
2431 * If an item is compressed, this is the uncompressed size
2433 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb,
2435 const struct btrfs_file_extent_item *fi)
2437 struct btrfs_map_token token;
2439 btrfs_init_map_token(&token);
2441 * return the space used on disk if this item isn't
2442 * compressed or encoded
2444 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
2445 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
2446 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
2447 return btrfs_file_extent_inline_item_len(eb,
2448 btrfs_item_nr(slot));
2451 /* otherwise use the ram bytes field */
2452 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
2456 /* btrfs_dev_stats_item */
2457 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2458 const struct btrfs_dev_stats_item *ptr,
2463 read_extent_buffer(eb, &val,
2464 offsetof(struct btrfs_dev_stats_item, values) +
2465 ((unsigned long)ptr) + (index * sizeof(u64)),
2470 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2471 struct btrfs_dev_stats_item *ptr,
2474 write_extent_buffer(eb, &val,
2475 offsetof(struct btrfs_dev_stats_item, values) +
2476 ((unsigned long)ptr) + (index * sizeof(u64)),
2480 /* btrfs_qgroup_status_item */
2481 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2483 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2485 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2487 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2490 /* btrfs_qgroup_info_item */
2491 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2493 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2494 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2496 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2497 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2500 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2501 struct btrfs_qgroup_info_item, generation, 64);
2502 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2504 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2505 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2506 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2508 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2509 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2511 /* btrfs_qgroup_limit_item */
2512 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2514 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2516 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2518 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2520 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2523 /* btrfs_dev_replace_item */
2524 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2525 struct btrfs_dev_replace_item, src_devid, 64);
2526 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2527 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2529 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2531 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2533 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2535 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2536 num_write_errors, 64);
2537 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2538 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2540 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2542 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2545 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2546 struct btrfs_dev_replace_item, src_devid, 64);
2547 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2548 struct btrfs_dev_replace_item,
2549 cont_reading_from_srcdev_mode, 64);
2550 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2551 struct btrfs_dev_replace_item, replace_state, 64);
2552 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2553 struct btrfs_dev_replace_item, time_started, 64);
2554 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2555 struct btrfs_dev_replace_item, time_stopped, 64);
2556 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2557 struct btrfs_dev_replace_item, num_write_errors, 64);
2558 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2559 struct btrfs_dev_replace_item,
2560 num_uncorrectable_read_errors, 64);
2561 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2562 struct btrfs_dev_replace_item, cursor_left, 64);
2563 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2564 struct btrfs_dev_replace_item, cursor_right, 64);
2566 /* helper function to cast into the data area of the leaf. */
2567 #define btrfs_item_ptr(leaf, slot, type) \
2568 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2569 btrfs_item_offset_nr(leaf, slot)))
2571 #define btrfs_item_ptr_offset(leaf, slot) \
2572 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2573 btrfs_item_offset_nr(leaf, slot)))
2575 static inline u64 btrfs_name_hash(const char *name, int len)
2577 return crc32c((u32)~1, name, len);
2581 * Figure the key offset of an extended inode ref
2583 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2586 return (u64) crc32c(parent_objectid, name, len);
2589 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2591 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2592 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2595 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2597 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2602 enum btrfs_inline_ref_type {
2603 BTRFS_REF_TYPE_INVALID = 0,
2604 BTRFS_REF_TYPE_BLOCK = 1,
2605 BTRFS_REF_TYPE_DATA = 2,
2606 BTRFS_REF_TYPE_ANY = 3,
2609 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2610 struct btrfs_extent_inline_ref *iref,
2611 enum btrfs_inline_ref_type is_data);
2613 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2615 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2618 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2622 * Doing a truncate won't result in new nodes or leaves, just what we need for
2625 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2628 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2631 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2632 struct btrfs_fs_info *fs_info);
2633 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2634 struct btrfs_fs_info *fs_info);
2635 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2637 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2638 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2639 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2640 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2641 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2642 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2643 unsigned long count);
2644 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2645 unsigned long count, u64 transid, int wait);
2646 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2647 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2648 struct btrfs_fs_info *fs_info, u64 bytenr,
2649 u64 offset, int metadata, u64 *refs, u64 *flags);
2650 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2651 u64 bytenr, u64 num, int reserved);
2652 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2653 u64 bytenr, u64 num_bytes);
2654 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2655 struct extent_buffer *eb);
2656 int btrfs_cross_ref_exist(struct btrfs_root *root,
2657 u64 objectid, u64 offset, u64 bytenr);
2658 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2659 struct btrfs_fs_info *info,
2661 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2662 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2663 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2664 struct btrfs_root *root,
2665 u64 parent, u64 root_objectid,
2666 const struct btrfs_disk_key *key,
2667 int level, u64 hint,
2669 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2670 struct btrfs_root *root,
2671 struct extent_buffer *buf,
2672 u64 parent, int last_ref);
2673 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2674 struct btrfs_root *root, u64 owner,
2675 u64 offset, u64 ram_bytes,
2676 struct btrfs_key *ins);
2677 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2678 struct btrfs_fs_info *fs_info,
2679 u64 root_objectid, u64 owner, u64 offset,
2680 struct btrfs_key *ins);
2681 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2682 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2683 struct btrfs_key *ins, int is_data, int delalloc);
2684 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2685 struct extent_buffer *buf, int full_backref);
2686 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2687 struct extent_buffer *buf, int full_backref);
2688 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2689 struct btrfs_fs_info *fs_info,
2690 u64 bytenr, u64 num_bytes, u64 flags,
2691 int level, int is_data);
2692 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2693 struct btrfs_root *root,
2694 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2695 u64 owner, u64 offset);
2697 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2698 u64 start, u64 len, int delalloc);
2699 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2700 u64 start, u64 len);
2701 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2702 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2703 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2704 struct btrfs_root *root,
2705 u64 bytenr, u64 num_bytes, u64 parent,
2706 u64 root_objectid, u64 owner, u64 offset);
2708 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2709 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2710 struct btrfs_fs_info *fs_info);
2711 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2712 struct btrfs_fs_info *fs_info);
2713 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2714 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2715 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2716 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2717 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2718 struct btrfs_fs_info *fs_info, u64 bytes_used,
2719 u64 type, u64 chunk_offset, u64 size);
2720 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2721 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2722 struct btrfs_fs_info *fs_info,
2723 const u64 chunk_offset);
2724 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2725 struct btrfs_fs_info *fs_info, u64 group_start,
2726 struct extent_map *em);
2727 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2728 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2729 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2730 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2731 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2732 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2733 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2734 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2736 enum btrfs_reserve_flush_enum {
2737 /* If we are in the transaction, we can't flush anything.*/
2738 BTRFS_RESERVE_NO_FLUSH,
2740 * Flushing delalloc may cause deadlock somewhere, in this
2741 * case, use FLUSH LIMIT
2743 BTRFS_RESERVE_FLUSH_LIMIT,
2744 BTRFS_RESERVE_FLUSH_ALL,
2747 enum btrfs_flush_state {
2748 FLUSH_DELAYED_ITEMS_NR = 1,
2749 FLUSH_DELAYED_ITEMS = 2,
2751 FLUSH_DELALLOC_WAIT = 4,
2756 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2757 int btrfs_check_data_free_space(struct inode *inode,
2758 struct extent_changeset **reserved, u64 start, u64 len);
2759 void btrfs_free_reserved_data_space(struct inode *inode,
2760 struct extent_changeset *reserved, u64 start, u64 len);
2761 void btrfs_delalloc_release_space(struct inode *inode,
2762 struct extent_changeset *reserved,
2763 u64 start, u64 len, bool qgroup_free);
2764 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2766 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2767 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2768 struct btrfs_inode *inode);
2769 void btrfs_orphan_release_metadata(struct btrfs_inode *inode);
2770 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2771 struct btrfs_block_rsv *rsv,
2773 u64 *qgroup_reserved, bool use_global_rsv);
2774 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2775 struct btrfs_block_rsv *rsv);
2776 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2779 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2780 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2782 int btrfs_delalloc_reserve_space(struct inode *inode,
2783 struct extent_changeset **reserved, u64 start, u64 len);
2784 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2785 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2786 unsigned short type);
2787 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2788 struct btrfs_block_rsv *rsv,
2789 unsigned short type);
2790 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2791 struct btrfs_block_rsv *rsv);
2792 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
2793 int btrfs_block_rsv_add(struct btrfs_root *root,
2794 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2795 enum btrfs_reserve_flush_enum flush);
2796 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2797 int btrfs_block_rsv_refill(struct btrfs_root *root,
2798 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2799 enum btrfs_reserve_flush_enum flush);
2800 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2801 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2803 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2804 struct btrfs_block_rsv *dest, u64 num_bytes,
2806 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2807 struct btrfs_block_rsv *block_rsv,
2809 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info,
2810 struct btrfs_block_group_cache *cache);
2811 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2812 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2813 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2814 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2815 u64 start, u64 end);
2816 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2817 u64 num_bytes, u64 *actual_bytes);
2818 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2819 struct btrfs_fs_info *fs_info, u64 type);
2820 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2822 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2823 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2824 struct btrfs_fs_info *fs_info);
2825 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2826 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2827 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2828 void check_system_chunk(struct btrfs_trans_handle *trans,
2829 struct btrfs_fs_info *fs_info, const u64 type);
2830 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2831 struct btrfs_fs_info *info, u64 start, u64 end);
2834 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2835 int level, int *slot);
2836 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2837 int btrfs_previous_item(struct btrfs_root *root,
2838 struct btrfs_path *path, u64 min_objectid,
2840 int btrfs_previous_extent_item(struct btrfs_root *root,
2841 struct btrfs_path *path, u64 min_objectid);
2842 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2843 struct btrfs_path *path,
2844 const struct btrfs_key *new_key);
2845 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2846 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2847 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2848 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2849 struct btrfs_key *key, int lowest_level,
2851 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2852 struct btrfs_path *path,
2854 enum btrfs_compare_tree_result {
2855 BTRFS_COMPARE_TREE_NEW,
2856 BTRFS_COMPARE_TREE_DELETED,
2857 BTRFS_COMPARE_TREE_CHANGED,
2858 BTRFS_COMPARE_TREE_SAME,
2860 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2861 struct btrfs_path *right_path,
2862 struct btrfs_key *key,
2863 enum btrfs_compare_tree_result result,
2865 int btrfs_compare_trees(struct btrfs_root *left_root,
2866 struct btrfs_root *right_root,
2867 btrfs_changed_cb_t cb, void *ctx);
2868 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2869 struct btrfs_root *root, struct extent_buffer *buf,
2870 struct extent_buffer *parent, int parent_slot,
2871 struct extent_buffer **cow_ret);
2872 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2873 struct btrfs_root *root,
2874 struct extent_buffer *buf,
2875 struct extent_buffer **cow_ret, u64 new_root_objectid);
2876 int btrfs_block_can_be_shared(struct btrfs_root *root,
2877 struct extent_buffer *buf);
2878 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2880 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2881 struct btrfs_path *path, u32 new_size, int from_end);
2882 int btrfs_split_item(struct btrfs_trans_handle *trans,
2883 struct btrfs_root *root,
2884 struct btrfs_path *path,
2885 const struct btrfs_key *new_key,
2886 unsigned long split_offset);
2887 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2888 struct btrfs_root *root,
2889 struct btrfs_path *path,
2890 const struct btrfs_key *new_key);
2891 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2892 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2893 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2894 const struct btrfs_key *key, struct btrfs_path *p,
2895 int ins_len, int cow);
2896 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2897 struct btrfs_path *p, u64 time_seq);
2898 int btrfs_search_slot_for_read(struct btrfs_root *root,
2899 const struct btrfs_key *key,
2900 struct btrfs_path *p, int find_higher,
2902 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2903 struct btrfs_root *root, struct extent_buffer *parent,
2904 int start_slot, u64 *last_ret,
2905 struct btrfs_key *progress);
2906 void btrfs_release_path(struct btrfs_path *p);
2907 struct btrfs_path *btrfs_alloc_path(void);
2908 void btrfs_free_path(struct btrfs_path *p);
2909 void btrfs_set_path_blocking(struct btrfs_path *p);
2910 void btrfs_clear_path_blocking(struct btrfs_path *p,
2911 struct extent_buffer *held, int held_rw);
2912 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2914 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2915 struct btrfs_path *path, int slot, int nr);
2916 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2917 struct btrfs_root *root,
2918 struct btrfs_path *path)
2920 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2923 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2924 const struct btrfs_key *cpu_key, u32 *data_size,
2925 u32 total_data, u32 total_size, int nr);
2926 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2927 const struct btrfs_key *key, void *data, u32 data_size);
2928 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2929 struct btrfs_root *root,
2930 struct btrfs_path *path,
2931 const struct btrfs_key *cpu_key, u32 *data_size,
2934 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2935 struct btrfs_root *root,
2936 struct btrfs_path *path,
2937 const struct btrfs_key *key,
2940 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2943 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2944 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2945 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2947 static inline int btrfs_next_old_item(struct btrfs_root *root,
2948 struct btrfs_path *p, u64 time_seq)
2951 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2952 return btrfs_next_old_leaf(root, p, time_seq);
2955 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2957 return btrfs_next_old_item(root, p, 0);
2959 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2960 struct extent_buffer *leaf);
2961 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2962 struct btrfs_block_rsv *block_rsv,
2963 int update_ref, int for_reloc);
2964 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2965 struct btrfs_root *root,
2966 struct extent_buffer *node,
2967 struct extent_buffer *parent);
2968 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2971 * Do it this way so we only ever do one test_bit in the normal case.
2973 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2974 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2982 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2983 * anything except sleeping. This function is used to check the status of
2986 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2988 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2991 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2993 kfree(fs_info->balance_ctl);
2994 kfree(fs_info->delayed_root);
2995 kfree(fs_info->extent_root);
2996 kfree(fs_info->tree_root);
2997 kfree(fs_info->chunk_root);
2998 kfree(fs_info->dev_root);
2999 kfree(fs_info->csum_root);
3000 kfree(fs_info->quota_root);
3001 kfree(fs_info->uuid_root);
3002 kfree(fs_info->free_space_root);
3003 kfree(fs_info->super_copy);
3004 kfree(fs_info->super_for_commit);
3005 security_free_mnt_opts(&fs_info->security_opts);
3009 /* tree mod log functions from ctree.c */
3010 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3011 struct seq_list *elem);
3012 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3013 struct seq_list *elem);
3014 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3017 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3018 struct btrfs_fs_info *fs_info,
3019 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3020 const char *name, int name_len);
3021 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3022 struct btrfs_fs_info *fs_info,
3023 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3024 const char *name, int name_len);
3025 int btrfs_del_root(struct btrfs_trans_handle *trans,
3026 struct btrfs_fs_info *fs_info, const struct btrfs_key *key);
3027 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3028 const struct btrfs_key *key,
3029 struct btrfs_root_item *item);
3030 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3031 struct btrfs_root *root,
3032 struct btrfs_key *key,
3033 struct btrfs_root_item *item);
3034 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3035 struct btrfs_path *path, struct btrfs_root_item *root_item,
3036 struct btrfs_key *root_key);
3037 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3038 void btrfs_set_root_node(struct btrfs_root_item *item,
3039 struct extent_buffer *node);
3040 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3041 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3042 struct btrfs_root *root);
3045 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3046 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
3048 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3049 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
3051 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3052 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3056 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3057 const char *name, int name_len);
3058 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3059 struct btrfs_root *root, const char *name,
3060 int name_len, struct btrfs_inode *dir,
3061 struct btrfs_key *location, u8 type, u64 index);
3062 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3063 struct btrfs_root *root,
3064 struct btrfs_path *path, u64 dir,
3065 const char *name, int name_len,
3067 struct btrfs_dir_item *
3068 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3069 struct btrfs_root *root,
3070 struct btrfs_path *path, u64 dir,
3071 u64 objectid, const char *name, int name_len,
3073 struct btrfs_dir_item *
3074 btrfs_search_dir_index_item(struct btrfs_root *root,
3075 struct btrfs_path *path, u64 dirid,
3076 const char *name, int name_len);
3077 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3078 struct btrfs_root *root,
3079 struct btrfs_path *path,
3080 struct btrfs_dir_item *di);
3081 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3082 struct btrfs_root *root,
3083 struct btrfs_path *path, u64 objectid,
3084 const char *name, u16 name_len,
3085 const void *data, u16 data_len);
3086 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3087 struct btrfs_root *root,
3088 struct btrfs_path *path, u64 dir,
3089 const char *name, u16 name_len,
3091 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3092 struct btrfs_path *path,
3097 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3098 struct btrfs_root *root, u64 offset);
3099 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3100 struct btrfs_root *root, u64 offset);
3101 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3104 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3105 struct btrfs_root *root,
3106 const char *name, int name_len,
3107 u64 inode_objectid, u64 ref_objectid, u64 index);
3108 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3109 struct btrfs_root *root,
3110 const char *name, int name_len,
3111 u64 inode_objectid, u64 ref_objectid, u64 *index);
3112 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3113 struct btrfs_root *root,
3114 struct btrfs_path *path, u64 objectid);
3115 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3116 *root, struct btrfs_path *path,
3117 struct btrfs_key *location, int mod);
3119 struct btrfs_inode_extref *
3120 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3121 struct btrfs_root *root,
3122 struct btrfs_path *path,
3123 const char *name, int name_len,
3124 u64 inode_objectid, u64 ref_objectid, int ins_len,
3127 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3129 int name_len, struct btrfs_inode_ref **ref_ret);
3130 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3131 u64 ref_objectid, const char *name,
3133 struct btrfs_inode_extref **extref_ret);
3136 struct btrfs_dio_private;
3137 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3138 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3139 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3140 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3141 u64 logical_offset);
3142 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3143 struct btrfs_root *root,
3144 u64 objectid, u64 pos,
3145 u64 disk_offset, u64 disk_num_bytes,
3146 u64 num_bytes, u64 offset, u64 ram_bytes,
3147 u8 compression, u8 encryption, u16 other_encoding);
3148 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3149 struct btrfs_root *root,
3150 struct btrfs_path *path, u64 objectid,
3151 u64 bytenr, int mod);
3152 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root,
3154 struct btrfs_ordered_sum *sums);
3155 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3156 u64 file_start, int contig);
3157 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3158 struct list_head *list, int search_commit);
3159 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3160 const struct btrfs_path *path,
3161 struct btrfs_file_extent_item *fi,
3162 const bool new_inline,
3163 struct extent_map *em);
3166 struct btrfs_delalloc_work {
3167 struct inode *inode;
3169 struct completion completion;
3170 struct list_head list;
3171 struct btrfs_work work;
3174 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3176 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3178 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3179 struct page *page, size_t pg_offset, u64 start,
3180 u64 len, int create);
3181 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3182 u64 *orig_start, u64 *orig_block_len,
3185 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3186 struct btrfs_inode *inode);
3187 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3188 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3189 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3190 struct btrfs_root *root,
3191 struct btrfs_inode *dir, struct btrfs_inode *inode,
3192 const char *name, int name_len);
3193 int btrfs_add_link(struct btrfs_trans_handle *trans,
3194 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3195 const char *name, int name_len, int add_backref, u64 index);
3196 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3197 struct btrfs_root *root,
3198 struct inode *dir, u64 objectid,
3199 const char *name, int name_len);
3200 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3202 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3203 struct btrfs_root *root,
3204 struct inode *inode, u64 new_size,
3207 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3208 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3210 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3211 unsigned int extra_bits,
3212 struct extent_state **cached_state, int dedupe);
3213 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3214 struct btrfs_root *new_root,
3215 struct btrfs_root *parent_root,
3217 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3218 size_t size, struct bio *bio,
3219 unsigned long bio_flags);
3220 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end);
3221 int btrfs_page_mkwrite(struct vm_fault *vmf);
3222 int btrfs_readpage(struct file *file, struct page *page);
3223 void btrfs_evict_inode(struct inode *inode);
3224 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3225 struct inode *btrfs_alloc_inode(struct super_block *sb);
3226 void btrfs_destroy_inode(struct inode *inode);
3227 int btrfs_drop_inode(struct inode *inode);
3228 int __init btrfs_init_cachep(void);
3229 void __cold btrfs_destroy_cachep(void);
3230 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3231 struct btrfs_root *root, int *was_new);
3232 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3233 struct page *page, size_t pg_offset,
3234 u64 start, u64 end, int create);
3235 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3236 struct btrfs_root *root,
3237 struct inode *inode);
3238 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3239 struct btrfs_root *root, struct inode *inode);
3240 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3241 struct btrfs_inode *inode);
3242 int btrfs_orphan_cleanup(struct btrfs_root *root);
3243 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3244 struct btrfs_root *root);
3245 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3246 void btrfs_invalidate_inodes(struct btrfs_root *root);
3247 void btrfs_add_delayed_iput(struct inode *inode);
3248 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3249 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3250 u64 start, u64 num_bytes, u64 min_size,
3251 loff_t actual_len, u64 *alloc_hint);
3252 int btrfs_prealloc_file_range_trans(struct inode *inode,
3253 struct btrfs_trans_handle *trans, int mode,
3254 u64 start, u64 num_bytes, u64 min_size,
3255 loff_t actual_len, u64 *alloc_hint);
3256 extern const struct dentry_operations btrfs_dentry_operations;
3257 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3258 void btrfs_test_inode_set_ops(struct inode *inode);
3262 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3263 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3264 int btrfs_ioctl_get_supported_features(void __user *arg);
3265 void btrfs_update_iflags(struct inode *inode);
3266 int btrfs_is_empty_uuid(u8 *uuid);
3267 int btrfs_defrag_file(struct inode *inode, struct file *file,
3268 struct btrfs_ioctl_defrag_range_args *range,
3269 u64 newer_than, unsigned long max_pages);
3270 void btrfs_get_block_group_info(struct list_head *groups_list,
3271 struct btrfs_ioctl_space_info *space);
3272 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3273 struct btrfs_ioctl_balance_args *bargs);
3274 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
3275 struct file *dst_file, u64 dst_loff);
3278 int __init btrfs_auto_defrag_init(void);
3279 void __cold btrfs_auto_defrag_exit(void);
3280 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3281 struct btrfs_inode *inode);
3282 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3283 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3284 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3285 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3287 extern const struct file_operations btrfs_file_operations;
3288 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3289 struct btrfs_root *root, struct inode *inode,
3290 struct btrfs_path *path, u64 start, u64 end,
3291 u64 *drop_end, int drop_cache,
3293 u32 extent_item_size,
3295 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3296 struct btrfs_root *root, struct inode *inode, u64 start,
3297 u64 end, int drop_cache);
3298 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3299 struct btrfs_inode *inode, u64 start, u64 end);
3300 int btrfs_release_file(struct inode *inode, struct file *file);
3301 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3302 size_t num_pages, loff_t pos, size_t write_bytes,
3303 struct extent_state **cached);
3304 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3305 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3306 struct file *file_out, loff_t pos_out, u64 len);
3309 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3310 struct btrfs_root *root);
3313 int __init btrfs_init_sysfs(void);
3314 void __cold btrfs_exit_sysfs(void);
3315 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3316 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3319 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3320 unsigned long new_flags);
3321 int btrfs_sync_fs(struct super_block *sb, int wait);
3323 static inline __printf(2, 3) __cold
3324 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3328 #ifdef CONFIG_PRINTK
3331 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3333 #define btrfs_printk(fs_info, fmt, args...) \
3334 btrfs_no_printk(fs_info, fmt, ##args)
3337 #define btrfs_emerg(fs_info, fmt, args...) \
3338 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3339 #define btrfs_alert(fs_info, fmt, args...) \
3340 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3341 #define btrfs_crit(fs_info, fmt, args...) \
3342 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3343 #define btrfs_err(fs_info, fmt, args...) \
3344 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3345 #define btrfs_warn(fs_info, fmt, args...) \
3346 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3347 #define btrfs_notice(fs_info, fmt, args...) \
3348 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3349 #define btrfs_info(fs_info, fmt, args...) \
3350 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3353 * Wrappers that use printk_in_rcu
3355 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3356 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3357 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3358 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3359 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3360 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3361 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3362 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3363 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3364 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3365 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3366 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3367 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3368 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3371 * Wrappers that use a ratelimited printk_in_rcu
3373 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3374 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3375 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3376 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3377 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3378 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3379 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3380 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3381 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3382 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3383 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3384 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3385 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3386 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3389 * Wrappers that use a ratelimited printk
3391 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3392 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3393 #define btrfs_alert_rl(fs_info, fmt, args...) \
3394 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3395 #define btrfs_crit_rl(fs_info, fmt, args...) \
3396 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3397 #define btrfs_err_rl(fs_info, fmt, args...) \
3398 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3399 #define btrfs_warn_rl(fs_info, fmt, args...) \
3400 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3401 #define btrfs_notice_rl(fs_info, fmt, args...) \
3402 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3403 #define btrfs_info_rl(fs_info, fmt, args...) \
3404 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3406 #if defined(CONFIG_DYNAMIC_DEBUG)
3407 #define btrfs_debug(fs_info, fmt, args...) \
3409 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3410 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3411 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3413 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3415 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3416 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3417 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3419 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3421 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3422 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3423 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3426 #define btrfs_debug_rl(fs_info, fmt, args...) \
3428 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3429 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3430 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3433 #elif defined(DEBUG)
3434 #define btrfs_debug(fs_info, fmt, args...) \
3435 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3436 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3437 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3438 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3439 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3440 #define btrfs_debug_rl(fs_info, fmt, args...) \
3441 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3443 #define btrfs_debug(fs_info, fmt, args...) \
3444 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3445 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3446 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3447 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3448 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3449 #define btrfs_debug_rl(fs_info, fmt, args...) \
3450 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3453 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3456 btrfs_printk(fs_info, fmt, ##args); \
3457 rcu_read_unlock(); \
3460 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3462 static DEFINE_RATELIMIT_STATE(_rs, \
3463 DEFAULT_RATELIMIT_INTERVAL, \
3464 DEFAULT_RATELIMIT_BURST); \
3465 if (__ratelimit(&_rs)) \
3466 btrfs_printk(fs_info, fmt, ##args); \
3469 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3472 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3473 rcu_read_unlock(); \
3476 #ifdef CONFIG_BTRFS_ASSERT
3479 static inline void assfail(char *expr, char *file, int line)
3481 pr_err("assertion failed: %s, file: %s, line: %d\n",
3486 #define ASSERT(expr) \
3487 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3489 #define ASSERT(expr) ((void)0)
3494 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3495 unsigned int line, int errno, const char *fmt, ...);
3497 const char *btrfs_decode_error(int errno);
3500 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3501 const char *function,
3502 unsigned int line, int errno);
3505 * Call btrfs_abort_transaction as early as possible when an error condition is
3506 * detected, that way the exact line number is reported.
3508 #define btrfs_abort_transaction(trans, errno) \
3510 /* Report first abort since mount */ \
3511 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3512 &((trans)->fs_info->fs_state))) { \
3513 if ((errno) != -EIO) { \
3514 WARN(1, KERN_DEBUG \
3515 "BTRFS: Transaction aborted (error %d)\n", \
3518 btrfs_debug((trans)->fs_info, \
3519 "Transaction aborted (error %d)", \
3523 __btrfs_abort_transaction((trans), __func__, \
3524 __LINE__, (errno)); \
3527 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3529 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3530 (errno), fmt, ##args); \
3535 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3536 unsigned int line, int errno, const char *fmt, ...);
3538 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3539 * will panic(). Otherwise we BUG() here.
3541 #define btrfs_panic(fs_info, errno, fmt, args...) \
3543 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3548 /* compatibility and incompatibility defines */
3550 #define btrfs_set_fs_incompat(__fs_info, opt) \
3551 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3553 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3556 struct btrfs_super_block *disk_super;
3559 disk_super = fs_info->super_copy;
3560 features = btrfs_super_incompat_flags(disk_super);
3561 if (!(features & flag)) {
3562 spin_lock(&fs_info->super_lock);
3563 features = btrfs_super_incompat_flags(disk_super);
3564 if (!(features & flag)) {
3566 btrfs_set_super_incompat_flags(disk_super, features);
3567 btrfs_info(fs_info, "setting %llu feature flag",
3570 spin_unlock(&fs_info->super_lock);
3574 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3575 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3577 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3580 struct btrfs_super_block *disk_super;
3583 disk_super = fs_info->super_copy;
3584 features = btrfs_super_incompat_flags(disk_super);
3585 if (features & flag) {
3586 spin_lock(&fs_info->super_lock);
3587 features = btrfs_super_incompat_flags(disk_super);
3588 if (features & flag) {
3590 btrfs_set_super_incompat_flags(disk_super, features);
3591 btrfs_info(fs_info, "clearing %llu feature flag",
3594 spin_unlock(&fs_info->super_lock);
3598 #define btrfs_fs_incompat(fs_info, opt) \
3599 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3601 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3603 struct btrfs_super_block *disk_super;
3604 disk_super = fs_info->super_copy;
3605 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3608 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3609 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3611 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3614 struct btrfs_super_block *disk_super;
3617 disk_super = fs_info->super_copy;
3618 features = btrfs_super_compat_ro_flags(disk_super);
3619 if (!(features & flag)) {
3620 spin_lock(&fs_info->super_lock);
3621 features = btrfs_super_compat_ro_flags(disk_super);
3622 if (!(features & flag)) {
3624 btrfs_set_super_compat_ro_flags(disk_super, features);
3625 btrfs_info(fs_info, "setting %llu ro feature flag",
3628 spin_unlock(&fs_info->super_lock);
3632 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3633 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3635 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3638 struct btrfs_super_block *disk_super;
3641 disk_super = fs_info->super_copy;
3642 features = btrfs_super_compat_ro_flags(disk_super);
3643 if (features & flag) {
3644 spin_lock(&fs_info->super_lock);
3645 features = btrfs_super_compat_ro_flags(disk_super);
3646 if (features & flag) {
3648 btrfs_set_super_compat_ro_flags(disk_super, features);
3649 btrfs_info(fs_info, "clearing %llu ro feature flag",
3652 spin_unlock(&fs_info->super_lock);
3656 #define btrfs_fs_compat_ro(fs_info, opt) \
3657 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3659 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3661 struct btrfs_super_block *disk_super;
3662 disk_super = fs_info->super_copy;
3663 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3667 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3668 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3669 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3670 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3671 struct inode *inode, struct inode *dir);
3673 #define btrfs_get_acl NULL
3674 #define btrfs_set_acl NULL
3675 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3676 struct inode *inode, struct inode *dir)
3683 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3684 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3685 struct btrfs_root *root);
3686 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3687 struct btrfs_root *root);
3688 int btrfs_recover_relocation(struct btrfs_root *root);
3689 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3690 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3691 struct btrfs_root *root, struct extent_buffer *buf,
3692 struct extent_buffer *cow);
3693 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3694 u64 *bytes_to_reserve);
3695 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3696 struct btrfs_pending_snapshot *pending);
3699 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3700 u64 end, struct btrfs_scrub_progress *progress,
3701 int readonly, int is_dev_replace);
3702 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3703 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3704 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3705 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3706 struct btrfs_device *dev);
3707 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3708 struct btrfs_scrub_progress *progress);
3709 static inline void btrfs_init_full_stripe_locks_tree(
3710 struct btrfs_full_stripe_locks_tree *locks_root)
3712 locks_root->root = RB_ROOT;
3713 mutex_init(&locks_root->lock);
3717 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3718 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3719 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3721 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3723 btrfs_bio_counter_sub(fs_info, 1);
3727 struct reada_control {
3728 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3729 struct btrfs_key key_start;
3730 struct btrfs_key key_end; /* exclusive */
3733 wait_queue_head_t wait;
3735 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3736 struct btrfs_key *start, struct btrfs_key *end);
3737 int btrfs_reada_wait(void *handle);
3738 void btrfs_reada_detach(void *handle);
3739 int btree_readahead_hook(struct extent_buffer *eb, int err);
3741 static inline int is_fstree(u64 rootid)
3743 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3744 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3745 !btrfs_qgroup_level(rootid)))
3750 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3752 return signal_pending(current);
3755 /* Sanity test specific functions */
3756 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3757 void btrfs_test_destroy_inode(struct inode *inode);
3760 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3762 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3763 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3764 &fs_info->fs_state)))