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;
465 * free clusters are used to claim free space in relatively large chunks,
466 * allowing us to do less seeky writes. They are used for all metadata
467 * allocations. In ssd_spread mode they are also used for data allocations.
469 struct btrfs_free_cluster {
471 spinlock_t refill_lock;
474 /* largest extent in this cluster */
477 /* first extent starting offset */
480 /* We did a full search and couldn't create a cluster */
483 struct btrfs_block_group_cache *block_group;
485 * when a cluster is allocated from a block group, we put the
486 * cluster onto a list in the block group so that it can
487 * be freed before the block group is freed.
489 struct list_head block_group_list;
492 enum btrfs_caching_type {
494 BTRFS_CACHE_STARTED = 1,
495 BTRFS_CACHE_FAST = 2,
496 BTRFS_CACHE_FINISHED = 3,
497 BTRFS_CACHE_ERROR = 4,
500 enum btrfs_disk_cache_state {
501 BTRFS_DC_WRITTEN = 0,
507 struct btrfs_caching_control {
508 struct list_head list;
510 wait_queue_head_t wait;
511 struct btrfs_work work;
512 struct btrfs_block_group_cache *block_group;
517 /* Once caching_thread() finds this much free space, it will wake up waiters. */
518 #define CACHING_CTL_WAKE_UP SZ_2M
520 struct btrfs_io_ctl {
524 struct btrfs_fs_info *fs_info;
531 unsigned check_crcs:1;
535 * Tree to record all locked full stripes of a RAID5/6 block group
537 struct btrfs_full_stripe_locks_tree {
542 struct btrfs_block_group_cache {
543 struct btrfs_key key;
544 struct btrfs_block_group_item item;
545 struct btrfs_fs_info *fs_info;
553 u64 cache_generation;
556 * If the free space extent count exceeds this number, convert the block
559 u32 bitmap_high_thresh;
562 * If the free space extent count drops below this number, convert the
563 * block group back to extents.
565 u32 bitmap_low_thresh;
568 * It is just used for the delayed data space allocation because
569 * only the data space allocation and the relative metadata update
570 * can be done cross the transaction.
572 struct rw_semaphore data_rwsem;
574 /* for raid56, this is a full stripe, without parity */
575 unsigned long full_stripe_len;
579 unsigned int has_caching_ctl:1;
580 unsigned int removed:1;
582 int disk_cache_state;
584 /* cache tracking stuff */
586 struct btrfs_caching_control *caching_ctl;
587 u64 last_byte_to_unpin;
589 struct btrfs_space_info *space_info;
591 /* free space cache stuff */
592 struct btrfs_free_space_ctl *free_space_ctl;
594 /* block group cache stuff */
595 struct rb_node cache_node;
597 /* for block groups in the same raid type */
598 struct list_head list;
603 /* List of struct btrfs_free_clusters for this block group.
604 * Today it will only have one thing on it, but that may change
606 struct list_head cluster_list;
608 /* For delayed block group creation or deletion of empty block groups */
609 struct list_head bg_list;
611 /* For read-only block groups */
612 struct list_head ro_list;
616 /* For dirty block groups */
617 struct list_head dirty_list;
618 struct list_head io_list;
620 struct btrfs_io_ctl io_ctl;
623 * Incremented when doing extent allocations and holding a read lock
624 * on the space_info's groups_sem semaphore.
625 * Decremented when an ordered extent that represents an IO against this
626 * block group's range is created (after it's added to its inode's
627 * root's list of ordered extents) or immediately after the allocation
628 * if it's a metadata extent or fallocate extent (for these cases we
629 * don't create ordered extents).
631 atomic_t reservations;
634 * Incremented while holding the spinlock *lock* by a task checking if
635 * it can perform a nocow write (incremented if the value for the *ro*
636 * field is 0). Decremented by such tasks once they create an ordered
637 * extent or before that if some error happens before reaching that step.
638 * This is to prevent races between block group relocation and nocow
639 * writes through direct IO.
641 atomic_t nocow_writers;
643 /* Lock for free space tree operations. */
644 struct mutex free_space_lock;
647 * Does the block group need to be added to the free space tree?
648 * Protected by free_space_lock.
650 int needs_free_space;
652 /* Record locked full stripes for RAID5/6 block group */
653 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
656 /* delayed seq elem */
658 struct list_head list;
662 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
664 #define SEQ_LAST ((u64)-1)
666 enum btrfs_orphan_cleanup_state {
667 ORPHAN_CLEANUP_STARTED = 1,
668 ORPHAN_CLEANUP_DONE = 2,
671 /* used by the raid56 code to lock stripes for read/modify/write */
672 struct btrfs_stripe_hash {
673 struct list_head hash_list;
677 /* used by the raid56 code to lock stripes for read/modify/write */
678 struct btrfs_stripe_hash_table {
679 struct list_head stripe_cache;
680 spinlock_t cache_lock;
682 struct btrfs_stripe_hash table[];
685 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
687 void btrfs_init_async_reclaim_work(struct work_struct *work);
690 struct reloc_control;
692 struct btrfs_fs_devices;
693 struct btrfs_balance_control;
694 struct btrfs_delayed_root;
696 #define BTRFS_FS_BARRIER 1
697 #define BTRFS_FS_CLOSING_START 2
698 #define BTRFS_FS_CLOSING_DONE 3
699 #define BTRFS_FS_LOG_RECOVERING 4
700 #define BTRFS_FS_OPEN 5
701 #define BTRFS_FS_QUOTA_ENABLED 6
702 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
703 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
704 #define BTRFS_FS_BTREE_ERR 11
705 #define BTRFS_FS_LOG1_ERR 12
706 #define BTRFS_FS_LOG2_ERR 13
707 #define BTRFS_FS_QUOTA_OVERRIDE 14
708 /* Used to record internally whether fs has been frozen */
709 #define BTRFS_FS_FROZEN 15
712 * Indicate that a whole-filesystem exclusive operation is running
713 * (device replace, resize, device add/delete, balance)
715 #define BTRFS_FS_EXCL_OP 16
717 struct btrfs_fs_info {
718 u8 fsid[BTRFS_FSID_SIZE];
719 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
721 struct btrfs_root *extent_root;
722 struct btrfs_root *tree_root;
723 struct btrfs_root *chunk_root;
724 struct btrfs_root *dev_root;
725 struct btrfs_root *fs_root;
726 struct btrfs_root *csum_root;
727 struct btrfs_root *quota_root;
728 struct btrfs_root *uuid_root;
729 struct btrfs_root *free_space_root;
731 /* the log root tree is a directory of all the other log roots */
732 struct btrfs_root *log_root_tree;
734 spinlock_t fs_roots_radix_lock;
735 struct radix_tree_root fs_roots_radix;
737 /* block group cache stuff */
738 spinlock_t block_group_cache_lock;
739 u64 first_logical_byte;
740 struct rb_root block_group_cache_tree;
742 /* keep track of unallocated space */
743 atomic64_t free_chunk_space;
745 struct extent_io_tree freed_extents[2];
746 struct extent_io_tree *pinned_extents;
748 /* logical->physical extent mapping */
749 struct btrfs_mapping_tree mapping_tree;
752 * block reservation for extent, checksum, root tree and
753 * delayed dir index item
755 struct btrfs_block_rsv global_block_rsv;
756 /* block reservation for metadata operations */
757 struct btrfs_block_rsv trans_block_rsv;
758 /* block reservation for chunk tree */
759 struct btrfs_block_rsv chunk_block_rsv;
760 /* block reservation for delayed operations */
761 struct btrfs_block_rsv delayed_block_rsv;
763 struct btrfs_block_rsv empty_block_rsv;
766 u64 last_trans_committed;
767 u64 avg_delayed_ref_runtime;
770 * this is updated to the current trans every time a full commit
771 * is required instead of the faster short fsync log commits
773 u64 last_trans_log_full_commit;
774 unsigned long mount_opt;
776 * Track requests for actions that need to be done during transaction
777 * commit (like for some mount options).
779 unsigned long pending_changes;
780 unsigned long compress_type:4;
781 unsigned int compress_level;
784 * It is a suggestive number, the read side is safe even it gets a
785 * wrong number because we will write out the data into a regular
786 * extent. The write side(mount/remount) is under ->s_umount lock,
787 * so it is also safe.
791 struct btrfs_transaction *running_transaction;
792 wait_queue_head_t transaction_throttle;
793 wait_queue_head_t transaction_wait;
794 wait_queue_head_t transaction_blocked_wait;
795 wait_queue_head_t async_submit_wait;
798 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
799 * when they are updated.
801 * Because we do not clear the flags for ever, so we needn't use
802 * the lock on the read side.
804 * We also needn't use the lock when we mount the fs, because
805 * there is no other task which will update the flag.
807 spinlock_t super_lock;
808 struct btrfs_super_block *super_copy;
809 struct btrfs_super_block *super_for_commit;
810 struct super_block *sb;
811 struct inode *btree_inode;
812 struct mutex tree_log_mutex;
813 struct mutex transaction_kthread_mutex;
814 struct mutex cleaner_mutex;
815 struct mutex chunk_mutex;
816 struct mutex volume_mutex;
819 * this is taken to make sure we don't set block groups ro after
820 * the free space cache has been allocated on them
822 struct mutex ro_block_group_mutex;
824 /* this is used during read/modify/write to make sure
825 * no two ios are trying to mod the same stripe at the same
828 struct btrfs_stripe_hash_table *stripe_hash_table;
831 * this protects the ordered operations list only while we are
832 * processing all of the entries on it. This way we make
833 * sure the commit code doesn't find the list temporarily empty
834 * because another function happens to be doing non-waiting preflush
835 * before jumping into the main commit.
837 struct mutex ordered_operations_mutex;
839 struct rw_semaphore commit_root_sem;
841 struct rw_semaphore cleanup_work_sem;
843 struct rw_semaphore subvol_sem;
844 struct srcu_struct subvol_srcu;
846 spinlock_t trans_lock;
848 * the reloc mutex goes with the trans lock, it is taken
849 * during commit to protect us from the relocation code
851 struct mutex reloc_mutex;
853 struct list_head trans_list;
854 struct list_head dead_roots;
855 struct list_head caching_block_groups;
857 spinlock_t delayed_iput_lock;
858 struct list_head delayed_iputs;
859 struct mutex cleaner_delayed_iput_mutex;
861 /* this protects tree_mod_seq_list */
862 spinlock_t tree_mod_seq_lock;
863 atomic64_t tree_mod_seq;
864 struct list_head tree_mod_seq_list;
866 /* this protects tree_mod_log */
867 rwlock_t tree_mod_log_lock;
868 struct rb_root tree_mod_log;
870 atomic_t async_delalloc_pages;
873 * this is used to protect the following list -- ordered_roots.
875 spinlock_t ordered_root_lock;
878 * all fs/file tree roots in which there are data=ordered extents
879 * pending writeback are added into this list.
881 * these can span multiple transactions and basically include
882 * every dirty data page that isn't from nodatacow
884 struct list_head ordered_roots;
886 struct mutex delalloc_root_mutex;
887 spinlock_t delalloc_root_lock;
888 /* all fs/file tree roots that have delalloc inodes. */
889 struct list_head delalloc_roots;
892 * there is a pool of worker threads for checksumming during writes
893 * and a pool for checksumming after reads. This is because readers
894 * can run with FS locks held, and the writers may be waiting for
895 * those locks. We don't want ordering in the pending list to cause
896 * deadlocks, and so the two are serviced separately.
898 * A third pool does submit_bio to avoid deadlocking with the other
901 struct btrfs_workqueue *workers;
902 struct btrfs_workqueue *delalloc_workers;
903 struct btrfs_workqueue *flush_workers;
904 struct btrfs_workqueue *endio_workers;
905 struct btrfs_workqueue *endio_meta_workers;
906 struct btrfs_workqueue *endio_raid56_workers;
907 struct btrfs_workqueue *endio_repair_workers;
908 struct btrfs_workqueue *rmw_workers;
909 struct btrfs_workqueue *endio_meta_write_workers;
910 struct btrfs_workqueue *endio_write_workers;
911 struct btrfs_workqueue *endio_freespace_worker;
912 struct btrfs_workqueue *submit_workers;
913 struct btrfs_workqueue *caching_workers;
914 struct btrfs_workqueue *readahead_workers;
917 * fixup workers take dirty pages that didn't properly go through
918 * the cow mechanism and make them safe to write. It happens
919 * for the sys_munmap function call path
921 struct btrfs_workqueue *fixup_workers;
922 struct btrfs_workqueue *delayed_workers;
924 /* the extent workers do delayed refs on the extent allocation tree */
925 struct btrfs_workqueue *extent_workers;
926 struct task_struct *transaction_kthread;
927 struct task_struct *cleaner_kthread;
928 u32 thread_pool_size;
930 struct kobject *space_info_kobj;
931 struct list_head pending_raid_kobjs;
932 spinlock_t pending_raid_kobjs_lock; /* uncontended */
936 /* used to keep from writing metadata until there is a nice batch */
937 struct percpu_counter dirty_metadata_bytes;
938 struct percpu_counter delalloc_bytes;
939 s32 dirty_metadata_batch;
942 struct list_head dirty_cowonly_roots;
944 struct btrfs_fs_devices *fs_devices;
947 * The space_info list is effectively read only after initial
948 * setup. It is populated at mount time and cleaned up after
949 * all block groups are removed. RCU is used to protect it.
951 struct list_head space_info;
953 struct btrfs_space_info *data_sinfo;
955 struct reloc_control *reloc_ctl;
957 /* data_alloc_cluster is only used in ssd_spread mode */
958 struct btrfs_free_cluster data_alloc_cluster;
960 /* all metadata allocations go through this cluster */
961 struct btrfs_free_cluster meta_alloc_cluster;
963 /* auto defrag inodes go here */
964 spinlock_t defrag_inodes_lock;
965 struct rb_root defrag_inodes;
966 atomic_t defrag_running;
968 /* Used to protect avail_{data, metadata, system}_alloc_bits */
969 seqlock_t profiles_lock;
971 * these three are in extended format (availability of single
972 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
973 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
975 u64 avail_data_alloc_bits;
976 u64 avail_metadata_alloc_bits;
977 u64 avail_system_alloc_bits;
979 /* restriper state */
980 spinlock_t balance_lock;
981 struct mutex balance_mutex;
982 atomic_t balance_running;
983 atomic_t balance_pause_req;
984 atomic_t balance_cancel_req;
985 struct btrfs_balance_control *balance_ctl;
986 wait_queue_head_t balance_wait_q;
988 u32 data_chunk_allocations;
993 /* private scrub information */
994 struct mutex scrub_lock;
995 atomic_t scrubs_running;
996 atomic_t scrub_pause_req;
997 atomic_t scrubs_paused;
998 atomic_t scrub_cancel_req;
999 wait_queue_head_t scrub_pause_wait;
1000 int scrub_workers_refcnt;
1001 struct btrfs_workqueue *scrub_workers;
1002 struct btrfs_workqueue *scrub_wr_completion_workers;
1003 struct btrfs_workqueue *scrub_nocow_workers;
1004 struct btrfs_workqueue *scrub_parity_workers;
1006 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1007 u32 check_integrity_print_mask;
1009 /* is qgroup tracking in a consistent state? */
1012 /* holds configuration and tracking. Protected by qgroup_lock */
1013 struct rb_root qgroup_tree;
1014 struct rb_root qgroup_op_tree;
1015 spinlock_t qgroup_lock;
1016 spinlock_t qgroup_op_lock;
1017 atomic_t qgroup_op_seq;
1020 * used to avoid frequently calling ulist_alloc()/ulist_free()
1021 * when doing qgroup accounting, it must be protected by qgroup_lock.
1023 struct ulist *qgroup_ulist;
1025 /* protect user change for quota operations */
1026 struct mutex qgroup_ioctl_lock;
1028 /* list of dirty qgroups to be written at next commit */
1029 struct list_head dirty_qgroups;
1031 /* used by qgroup for an efficient tree traversal */
1034 /* qgroup rescan items */
1035 struct mutex qgroup_rescan_lock; /* protects the progress item */
1036 struct btrfs_key qgroup_rescan_progress;
1037 struct btrfs_workqueue *qgroup_rescan_workers;
1038 struct completion qgroup_rescan_completion;
1039 struct btrfs_work qgroup_rescan_work;
1040 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1042 /* filesystem state */
1043 unsigned long fs_state;
1045 struct btrfs_delayed_root *delayed_root;
1047 /* readahead tree */
1048 spinlock_t reada_lock;
1049 struct radix_tree_root reada_tree;
1051 /* readahead works cnt */
1052 atomic_t reada_works_cnt;
1054 /* Extent buffer radix tree */
1055 spinlock_t buffer_lock;
1056 struct radix_tree_root buffer_radix;
1058 /* next backup root to be overwritten */
1059 int backup_root_index;
1061 /* device replace state */
1062 struct btrfs_dev_replace dev_replace;
1064 struct percpu_counter bio_counter;
1065 wait_queue_head_t replace_wait;
1067 struct semaphore uuid_tree_rescan_sem;
1069 /* Used to reclaim the metadata space in the background. */
1070 struct work_struct async_reclaim_work;
1072 spinlock_t unused_bgs_lock;
1073 struct list_head unused_bgs;
1074 struct mutex unused_bg_unpin_mutex;
1075 struct mutex delete_unused_bgs_mutex;
1077 /* For btrfs to record security options */
1078 struct security_mnt_opts security_opts;
1081 * Chunks that can't be freed yet (under a trim/discard operation)
1082 * and will be latter freed. Protected by fs_info->chunk_mutex.
1084 struct list_head pinned_chunks;
1086 /* Cached block sizes */
1091 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1092 spinlock_t ref_verify_lock;
1093 struct rb_root block_tree;
1097 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1099 return sb->s_fs_info;
1102 struct btrfs_subvolume_writers {
1103 struct percpu_counter counter;
1104 wait_queue_head_t wait;
1108 * The state of btrfs root
1111 * btrfs_record_root_in_trans is a multi-step process,
1112 * and it can race with the balancing code. But the
1113 * race is very small, and only the first time the root
1114 * is added to each transaction. So IN_TRANS_SETUP
1115 * is used to tell us when more checks are required
1117 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1118 #define BTRFS_ROOT_REF_COWS 1
1119 #define BTRFS_ROOT_TRACK_DIRTY 2
1120 #define BTRFS_ROOT_IN_RADIX 3
1121 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1122 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1123 #define BTRFS_ROOT_FORCE_COW 6
1124 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1125 #define BTRFS_ROOT_DIRTY 8
1128 * in ram representation of the tree. extent_root is used for all allocations
1129 * and for the extent tree extent_root root.
1132 struct extent_buffer *node;
1134 struct extent_buffer *commit_root;
1135 struct btrfs_root *log_root;
1136 struct btrfs_root *reloc_root;
1138 unsigned long state;
1139 struct btrfs_root_item root_item;
1140 struct btrfs_key root_key;
1141 struct btrfs_fs_info *fs_info;
1142 struct extent_io_tree dirty_log_pages;
1144 struct mutex objectid_mutex;
1146 spinlock_t accounting_lock;
1147 struct btrfs_block_rsv *block_rsv;
1149 /* free ino cache stuff */
1150 struct btrfs_free_space_ctl *free_ino_ctl;
1151 enum btrfs_caching_type ino_cache_state;
1152 spinlock_t ino_cache_lock;
1153 wait_queue_head_t ino_cache_wait;
1154 struct btrfs_free_space_ctl *free_ino_pinned;
1155 u64 ino_cache_progress;
1156 struct inode *ino_cache_inode;
1158 struct mutex log_mutex;
1159 wait_queue_head_t log_writer_wait;
1160 wait_queue_head_t log_commit_wait[2];
1161 struct list_head log_ctxs[2];
1162 atomic_t log_writers;
1163 atomic_t log_commit[2];
1166 /* No matter the commit succeeds or not*/
1167 int log_transid_committed;
1168 /* Just be updated when the commit succeeds. */
1169 int last_log_commit;
1170 pid_t log_start_pid;
1177 u64 highest_objectid;
1179 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1180 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1184 u64 defrag_trans_start;
1185 struct btrfs_key defrag_progress;
1186 struct btrfs_key defrag_max;
1189 /* the dirty list is only used by non-reference counted roots */
1190 struct list_head dirty_list;
1192 struct list_head root_list;
1194 spinlock_t log_extents_lock[2];
1195 struct list_head logged_list[2];
1197 spinlock_t orphan_lock;
1198 atomic_t orphan_inodes;
1199 struct btrfs_block_rsv *orphan_block_rsv;
1200 int orphan_cleanup_state;
1202 spinlock_t inode_lock;
1203 /* red-black tree that keeps track of in-memory inodes */
1204 struct rb_root inode_tree;
1207 * radix tree that keeps track of delayed nodes of every inode,
1208 * protected by inode_lock
1210 struct radix_tree_root delayed_nodes_tree;
1212 * right now this just gets used so that a root has its own devid
1213 * for stat. It may be used for more later
1217 spinlock_t root_item_lock;
1220 struct mutex delalloc_mutex;
1221 spinlock_t delalloc_lock;
1223 * all of the inodes that have delalloc bytes. It is possible for
1224 * this list to be empty even when there is still dirty data=ordered
1225 * extents waiting to finish IO.
1227 struct list_head delalloc_inodes;
1228 struct list_head delalloc_root;
1229 u64 nr_delalloc_inodes;
1231 struct mutex ordered_extent_mutex;
1233 * this is used by the balancing code to wait for all the pending
1236 spinlock_t ordered_extent_lock;
1239 * all of the data=ordered extents pending writeback
1240 * these can span multiple transactions and basically include
1241 * every dirty data page that isn't from nodatacow
1243 struct list_head ordered_extents;
1244 struct list_head ordered_root;
1245 u64 nr_ordered_extents;
1248 * Number of currently running SEND ioctls to prevent
1249 * manipulation with the read-only status via SUBVOL_SETFLAGS
1251 int send_in_progress;
1252 struct btrfs_subvolume_writers *subv_writers;
1253 atomic_t will_be_snapshotted;
1255 /* For qgroup metadata reserved space */
1256 spinlock_t qgroup_meta_rsv_lock;
1257 u64 qgroup_meta_rsv_pertrans;
1258 u64 qgroup_meta_rsv_prealloc;
1261 struct btrfs_file_private {
1265 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1267 return btrfs_sb(inode->i_sb)->sectorsize;
1270 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1273 return info->nodesize - sizeof(struct btrfs_header);
1276 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1278 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1280 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1283 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1285 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1288 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1289 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1290 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1292 return BTRFS_MAX_ITEM_SIZE(info) -
1293 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1296 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1298 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1302 * Flags for mount options.
1304 * Note: don't forget to add new options to btrfs_show_options()
1306 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1307 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1308 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1309 #define BTRFS_MOUNT_SSD (1 << 3)
1310 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1311 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1312 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1313 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1314 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1315 #define BTRFS_MOUNT_NOSSD (1 << 9)
1316 #define BTRFS_MOUNT_DISCARD (1 << 10)
1317 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1318 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1319 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1320 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1321 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1322 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1323 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1324 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1325 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1326 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1327 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1328 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1329 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1330 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1331 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1332 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1333 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1334 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1336 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1337 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1339 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1340 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1341 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1342 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1345 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1347 if (!btrfs_test_opt(fs_info, opt)) \
1348 btrfs_info(fs_info, fmt, ##args); \
1349 btrfs_set_opt(fs_info->mount_opt, opt); \
1352 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1354 if (btrfs_test_opt(fs_info, opt)) \
1355 btrfs_info(fs_info, fmt, ##args); \
1356 btrfs_clear_opt(fs_info->mount_opt, opt); \
1359 #ifdef CONFIG_BTRFS_DEBUG
1361 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1363 struct btrfs_fs_info *fs_info = block_group->fs_info;
1365 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1366 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1367 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1368 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1373 * Requests for changes that need to be done during transaction commit.
1375 * Internal mount options that are used for special handling of the real
1376 * mount options (eg. cannot be set during remount and have to be set during
1377 * transaction commit)
1380 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1381 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1382 #define BTRFS_PENDING_COMMIT (2)
1384 #define btrfs_test_pending(info, opt) \
1385 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1386 #define btrfs_set_pending(info, opt) \
1387 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1388 #define btrfs_clear_pending(info, opt) \
1389 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1392 * Helpers for setting pending mount option changes.
1394 * Expects corresponding macros
1395 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1397 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1399 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1400 btrfs_info((info), fmt, ##args); \
1401 btrfs_set_pending((info), SET_##opt); \
1402 btrfs_clear_pending((info), CLEAR_##opt); \
1406 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1408 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1409 btrfs_info((info), fmt, ##args); \
1410 btrfs_set_pending((info), CLEAR_##opt); \
1411 btrfs_clear_pending((info), SET_##opt); \
1418 #define BTRFS_INODE_NODATASUM (1 << 0)
1419 #define BTRFS_INODE_NODATACOW (1 << 1)
1420 #define BTRFS_INODE_READONLY (1 << 2)
1421 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1422 #define BTRFS_INODE_PREALLOC (1 << 4)
1423 #define BTRFS_INODE_SYNC (1 << 5)
1424 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1425 #define BTRFS_INODE_APPEND (1 << 7)
1426 #define BTRFS_INODE_NODUMP (1 << 8)
1427 #define BTRFS_INODE_NOATIME (1 << 9)
1428 #define BTRFS_INODE_DIRSYNC (1 << 10)
1429 #define BTRFS_INODE_COMPRESS (1 << 11)
1431 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1433 struct btrfs_map_token {
1434 const struct extent_buffer *eb;
1436 unsigned long offset;
1439 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1440 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1442 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1444 token->kaddr = NULL;
1447 /* some macros to generate set/get functions for the struct fields. This
1448 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1451 #define le8_to_cpu(v) (v)
1452 #define cpu_to_le8(v) (v)
1455 #define read_eb_member(eb, ptr, type, member, result) (\
1456 read_extent_buffer(eb, (char *)(result), \
1457 ((unsigned long)(ptr)) + \
1458 offsetof(type, member), \
1459 sizeof(((type *)0)->member)))
1461 #define write_eb_member(eb, ptr, type, member, result) (\
1462 write_extent_buffer(eb, (char *)(result), \
1463 ((unsigned long)(ptr)) + \
1464 offsetof(type, member), \
1465 sizeof(((type *)0)->member)))
1467 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1468 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1469 const void *ptr, unsigned long off, \
1470 struct btrfs_map_token *token); \
1471 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1472 unsigned long off, u##bits val, \
1473 struct btrfs_map_token *token); \
1474 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1476 unsigned long off) \
1478 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1480 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1481 unsigned long off, u##bits val) \
1483 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1486 DECLARE_BTRFS_SETGET_BITS(8)
1487 DECLARE_BTRFS_SETGET_BITS(16)
1488 DECLARE_BTRFS_SETGET_BITS(32)
1489 DECLARE_BTRFS_SETGET_BITS(64)
1491 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1492 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1495 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1496 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1498 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1501 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1502 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1504 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1506 struct btrfs_map_token *token) \
1508 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1509 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1511 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1512 type *s, u##bits val, \
1513 struct btrfs_map_token *token) \
1515 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1516 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1519 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1520 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1522 const type *p = page_address(eb->pages[0]); \
1523 u##bits res = le##bits##_to_cpu(p->member); \
1526 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1529 type *p = page_address(eb->pages[0]); \
1530 p->member = cpu_to_le##bits(val); \
1533 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1534 static inline u##bits btrfs_##name(const type *s) \
1536 return le##bits##_to_cpu(s->member); \
1538 static inline void btrfs_set_##name(type *s, u##bits val) \
1540 s->member = cpu_to_le##bits(val); \
1544 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1545 struct btrfs_dev_item *s)
1547 BUILD_BUG_ON(sizeof(u64) !=
1548 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1549 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1552 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1553 struct btrfs_dev_item *s,
1556 BUILD_BUG_ON(sizeof(u64) !=
1557 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1558 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1559 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1563 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1564 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1565 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1566 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1567 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1569 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1570 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1571 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1572 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1573 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1574 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1576 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1577 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1579 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1581 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1583 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1585 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1587 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1588 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1590 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1592 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1594 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1597 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1599 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1602 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1604 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1607 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1608 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1609 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1610 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1611 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1612 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1613 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1614 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1615 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1616 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1617 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1619 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1621 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1624 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1625 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1626 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1628 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1630 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1632 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1634 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1635 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1637 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1639 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1640 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1642 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1645 unsigned long offset = (unsigned long)c;
1646 offset += offsetof(struct btrfs_chunk, stripe);
1647 offset += nr * sizeof(struct btrfs_stripe);
1648 return (struct btrfs_stripe *)offset;
1651 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1653 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1656 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1657 struct btrfs_chunk *c, int nr)
1659 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1662 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1663 struct btrfs_chunk *c, int nr)
1665 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1668 /* struct btrfs_block_group_item */
1669 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1671 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1673 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1674 struct btrfs_block_group_item, chunk_objectid, 64);
1676 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1677 struct btrfs_block_group_item, chunk_objectid, 64);
1678 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1679 struct btrfs_block_group_item, flags, 64);
1680 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1681 struct btrfs_block_group_item, flags, 64);
1683 /* struct btrfs_free_space_info */
1684 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1686 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1688 /* struct btrfs_inode_ref */
1689 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1690 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1692 /* struct btrfs_inode_extref */
1693 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1694 parent_objectid, 64);
1695 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1697 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1699 /* struct btrfs_inode_item */
1700 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1701 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1702 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1703 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1704 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1705 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1706 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1707 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1708 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1709 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1710 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1711 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1712 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1714 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1716 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1718 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1719 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1721 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1723 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1724 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1725 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1726 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1727 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1728 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1729 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1730 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1731 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1732 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1734 /* struct btrfs_dev_extent */
1735 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1737 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1738 chunk_objectid, 64);
1739 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1741 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1743 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1745 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1746 return (unsigned long)dev + ptr;
1749 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1750 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1752 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1754 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1757 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1759 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1760 struct btrfs_tree_block_info *item,
1761 struct btrfs_disk_key *key)
1763 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1766 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1767 struct btrfs_tree_block_info *item,
1768 struct btrfs_disk_key *key)
1770 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1773 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1775 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1777 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1779 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1782 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1785 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1787 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1790 static inline u32 btrfs_extent_inline_ref_size(int type)
1792 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1793 type == BTRFS_SHARED_BLOCK_REF_KEY)
1794 return sizeof(struct btrfs_extent_inline_ref);
1795 if (type == BTRFS_SHARED_DATA_REF_KEY)
1796 return sizeof(struct btrfs_shared_data_ref) +
1797 sizeof(struct btrfs_extent_inline_ref);
1798 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1799 return sizeof(struct btrfs_extent_data_ref) +
1800 offsetof(struct btrfs_extent_inline_ref, offset);
1804 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1805 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1807 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1808 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1810 /* struct btrfs_node */
1811 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1812 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1813 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1815 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1818 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1821 ptr = offsetof(struct btrfs_node, ptrs) +
1822 sizeof(struct btrfs_key_ptr) * nr;
1823 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1826 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1830 ptr = offsetof(struct btrfs_node, ptrs) +
1831 sizeof(struct btrfs_key_ptr) * nr;
1832 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1835 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1838 ptr = offsetof(struct btrfs_node, ptrs) +
1839 sizeof(struct btrfs_key_ptr) * nr;
1840 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1843 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1847 ptr = offsetof(struct btrfs_node, ptrs) +
1848 sizeof(struct btrfs_key_ptr) * nr;
1849 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1852 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1854 return offsetof(struct btrfs_node, ptrs) +
1855 sizeof(struct btrfs_key_ptr) * nr;
1858 void btrfs_node_key(const struct extent_buffer *eb,
1859 struct btrfs_disk_key *disk_key, int nr);
1861 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1862 struct btrfs_disk_key *disk_key, int nr)
1865 ptr = btrfs_node_key_ptr_offset(nr);
1866 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1867 struct btrfs_key_ptr, key, disk_key);
1870 /* struct btrfs_item */
1871 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1872 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1873 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1874 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1876 static inline unsigned long btrfs_item_nr_offset(int nr)
1878 return offsetof(struct btrfs_leaf, items) +
1879 sizeof(struct btrfs_item) * nr;
1882 static inline struct btrfs_item *btrfs_item_nr(int nr)
1884 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1887 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1888 struct btrfs_item *item)
1890 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1893 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1895 return btrfs_item_end(eb, btrfs_item_nr(nr));
1898 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1900 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1903 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1905 return btrfs_item_size(eb, btrfs_item_nr(nr));
1908 static inline void btrfs_item_key(const struct extent_buffer *eb,
1909 struct btrfs_disk_key *disk_key, int nr)
1911 struct btrfs_item *item = btrfs_item_nr(nr);
1912 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1915 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1916 struct btrfs_disk_key *disk_key, int nr)
1918 struct btrfs_item *item = btrfs_item_nr(nr);
1919 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1922 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1925 * struct btrfs_root_ref
1927 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1928 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1929 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1931 /* struct btrfs_dir_item */
1932 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1933 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1934 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1935 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1936 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1937 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1939 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1941 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1944 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1945 const struct btrfs_dir_item *item,
1946 struct btrfs_disk_key *key)
1948 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1951 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1952 struct btrfs_dir_item *item,
1953 const struct btrfs_disk_key *key)
1955 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1958 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1960 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1962 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1965 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1966 const struct btrfs_free_space_header *h,
1967 struct btrfs_disk_key *key)
1969 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1972 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1973 struct btrfs_free_space_header *h,
1974 const struct btrfs_disk_key *key)
1976 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1979 /* struct btrfs_disk_key */
1980 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1982 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1983 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1985 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1986 const struct btrfs_disk_key *disk)
1988 cpu->offset = le64_to_cpu(disk->offset);
1989 cpu->type = disk->type;
1990 cpu->objectid = le64_to_cpu(disk->objectid);
1993 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1994 const struct btrfs_key *cpu)
1996 disk->offset = cpu_to_le64(cpu->offset);
1997 disk->type = cpu->type;
1998 disk->objectid = cpu_to_le64(cpu->objectid);
2001 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2002 struct btrfs_key *key, int nr)
2004 struct btrfs_disk_key disk_key;
2005 btrfs_node_key(eb, &disk_key, nr);
2006 btrfs_disk_key_to_cpu(key, &disk_key);
2009 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2010 struct btrfs_key *key, int nr)
2012 struct btrfs_disk_key disk_key;
2013 btrfs_item_key(eb, &disk_key, nr);
2014 btrfs_disk_key_to_cpu(key, &disk_key);
2017 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2018 const struct btrfs_dir_item *item,
2019 struct btrfs_key *key)
2021 struct btrfs_disk_key disk_key;
2022 btrfs_dir_item_key(eb, item, &disk_key);
2023 btrfs_disk_key_to_cpu(key, &disk_key);
2026 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2031 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2036 /* struct btrfs_header */
2037 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2038 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2040 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2041 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2042 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2043 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2044 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2046 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2047 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2049 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2051 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2053 return (btrfs_header_flags(eb) & flag) == flag;
2056 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2058 u64 flags = btrfs_header_flags(eb);
2059 btrfs_set_header_flags(eb, flags | flag);
2060 return (flags & flag) == flag;
2063 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2065 u64 flags = btrfs_header_flags(eb);
2066 btrfs_set_header_flags(eb, flags & ~flag);
2067 return (flags & flag) == flag;
2070 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2072 u64 flags = btrfs_header_flags(eb);
2073 return flags >> BTRFS_BACKREF_REV_SHIFT;
2076 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2079 u64 flags = btrfs_header_flags(eb);
2080 flags &= ~BTRFS_BACKREF_REV_MASK;
2081 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2082 btrfs_set_header_flags(eb, flags);
2085 static inline unsigned long btrfs_header_fsid(void)
2087 return offsetof(struct btrfs_header, fsid);
2090 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2092 return offsetof(struct btrfs_header, chunk_tree_uuid);
2095 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2097 return btrfs_header_level(eb) == 0;
2100 /* struct btrfs_root_item */
2101 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2103 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2104 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2105 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2107 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2109 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2110 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2111 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2112 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2113 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2114 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2115 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2116 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2118 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2120 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2122 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2124 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2126 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2129 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2131 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2134 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2136 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2139 /* struct btrfs_root_backup */
2140 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2142 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2144 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2145 tree_root_level, 8);
2147 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2149 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2150 chunk_root_gen, 64);
2151 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2152 chunk_root_level, 8);
2154 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2156 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2157 extent_root_gen, 64);
2158 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2159 extent_root_level, 8);
2161 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2163 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2165 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2168 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2170 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2172 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2175 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2177 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2179 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2180 csum_root_level, 8);
2181 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2183 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2185 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2188 /* struct btrfs_balance_item */
2189 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2191 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2192 const struct btrfs_balance_item *bi,
2193 struct btrfs_disk_balance_args *ba)
2195 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2198 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2199 struct btrfs_balance_item *bi,
2200 const struct btrfs_disk_balance_args *ba)
2202 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2205 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2206 const struct btrfs_balance_item *bi,
2207 struct btrfs_disk_balance_args *ba)
2209 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2212 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2213 struct btrfs_balance_item *bi,
2214 const struct btrfs_disk_balance_args *ba)
2216 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2219 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2220 const struct btrfs_balance_item *bi,
2221 struct btrfs_disk_balance_args *ba)
2223 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2226 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2227 struct btrfs_balance_item *bi,
2228 const struct btrfs_disk_balance_args *ba)
2230 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2234 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2235 const struct btrfs_disk_balance_args *disk)
2237 memset(cpu, 0, sizeof(*cpu));
2239 cpu->profiles = le64_to_cpu(disk->profiles);
2240 cpu->usage = le64_to_cpu(disk->usage);
2241 cpu->devid = le64_to_cpu(disk->devid);
2242 cpu->pstart = le64_to_cpu(disk->pstart);
2243 cpu->pend = le64_to_cpu(disk->pend);
2244 cpu->vstart = le64_to_cpu(disk->vstart);
2245 cpu->vend = le64_to_cpu(disk->vend);
2246 cpu->target = le64_to_cpu(disk->target);
2247 cpu->flags = le64_to_cpu(disk->flags);
2248 cpu->limit = le64_to_cpu(disk->limit);
2249 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2250 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2254 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2255 const struct btrfs_balance_args *cpu)
2257 memset(disk, 0, sizeof(*disk));
2259 disk->profiles = cpu_to_le64(cpu->profiles);
2260 disk->usage = cpu_to_le64(cpu->usage);
2261 disk->devid = cpu_to_le64(cpu->devid);
2262 disk->pstart = cpu_to_le64(cpu->pstart);
2263 disk->pend = cpu_to_le64(cpu->pend);
2264 disk->vstart = cpu_to_le64(cpu->vstart);
2265 disk->vend = cpu_to_le64(cpu->vend);
2266 disk->target = cpu_to_le64(cpu->target);
2267 disk->flags = cpu_to_le64(cpu->flags);
2268 disk->limit = cpu_to_le64(cpu->limit);
2269 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2270 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2273 /* struct btrfs_super_block */
2274 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2275 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2276 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2278 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2279 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2280 struct btrfs_super_block, sys_chunk_array_size, 32);
2281 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2282 struct btrfs_super_block, chunk_root_generation, 64);
2283 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2285 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2287 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2288 chunk_root_level, 8);
2289 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2291 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2292 log_root_transid, 64);
2293 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2295 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2297 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2299 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2301 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2303 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2305 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2306 root_dir_objectid, 64);
2307 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2309 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2311 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2312 compat_ro_flags, 64);
2313 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2314 incompat_flags, 64);
2315 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2317 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2318 cache_generation, 64);
2319 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2320 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2321 uuid_tree_generation, 64);
2323 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2325 u16 t = btrfs_super_csum_type(s);
2327 * csum type is validated at mount time
2329 return btrfs_csum_sizes[t];
2334 * The leaf data grows from end-to-front in the node.
2335 * this returns the address of the start of the last item,
2336 * which is the stop of the leaf data stack
2338 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2339 const struct extent_buffer *leaf)
2341 u32 nr = btrfs_header_nritems(leaf);
2344 return BTRFS_LEAF_DATA_SIZE(fs_info);
2345 return btrfs_item_offset_nr(leaf, nr - 1);
2348 /* struct btrfs_file_extent_item */
2349 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2350 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2351 struct btrfs_file_extent_item, disk_bytenr, 64);
2352 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2353 struct btrfs_file_extent_item, offset, 64);
2354 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2355 struct btrfs_file_extent_item, generation, 64);
2356 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2357 struct btrfs_file_extent_item, num_bytes, 64);
2358 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2359 struct btrfs_file_extent_item, disk_num_bytes, 64);
2360 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2361 struct btrfs_file_extent_item, compression, 8);
2363 static inline unsigned long
2364 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2366 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2369 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2371 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2374 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2376 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2378 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2379 disk_num_bytes, 64);
2380 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2382 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2384 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2386 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2388 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2390 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2391 other_encoding, 16);
2394 * this returns the number of bytes used by the item on disk, minus the
2395 * size of any extent headers. If a file is compressed on disk, this is
2396 * the compressed size
2398 static inline u32 btrfs_file_extent_inline_item_len(
2399 const struct extent_buffer *eb,
2400 struct btrfs_item *e)
2402 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2405 /* this returns the number of file bytes represented by the inline item.
2406 * If an item is compressed, this is the uncompressed size
2408 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb,
2410 const struct btrfs_file_extent_item *fi)
2412 struct btrfs_map_token token;
2414 btrfs_init_map_token(&token);
2416 * return the space used on disk if this item isn't
2417 * compressed or encoded
2419 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
2420 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
2421 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
2422 return btrfs_file_extent_inline_item_len(eb,
2423 btrfs_item_nr(slot));
2426 /* otherwise use the ram bytes field */
2427 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
2431 /* btrfs_dev_stats_item */
2432 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2433 const struct btrfs_dev_stats_item *ptr,
2438 read_extent_buffer(eb, &val,
2439 offsetof(struct btrfs_dev_stats_item, values) +
2440 ((unsigned long)ptr) + (index * sizeof(u64)),
2445 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2446 struct btrfs_dev_stats_item *ptr,
2449 write_extent_buffer(eb, &val,
2450 offsetof(struct btrfs_dev_stats_item, values) +
2451 ((unsigned long)ptr) + (index * sizeof(u64)),
2455 /* btrfs_qgroup_status_item */
2456 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2458 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2460 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2462 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2465 /* btrfs_qgroup_info_item */
2466 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2468 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2469 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2471 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2472 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2475 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2476 struct btrfs_qgroup_info_item, generation, 64);
2477 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2479 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2480 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2481 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2483 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2484 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2486 /* btrfs_qgroup_limit_item */
2487 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2489 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2491 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2493 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2495 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2498 /* btrfs_dev_replace_item */
2499 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2500 struct btrfs_dev_replace_item, src_devid, 64);
2501 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2502 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2504 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2506 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2508 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2510 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2511 num_write_errors, 64);
2512 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2513 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2515 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2517 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2520 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2521 struct btrfs_dev_replace_item, src_devid, 64);
2522 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2523 struct btrfs_dev_replace_item,
2524 cont_reading_from_srcdev_mode, 64);
2525 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2526 struct btrfs_dev_replace_item, replace_state, 64);
2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2528 struct btrfs_dev_replace_item, time_started, 64);
2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2530 struct btrfs_dev_replace_item, time_stopped, 64);
2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2532 struct btrfs_dev_replace_item, num_write_errors, 64);
2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2534 struct btrfs_dev_replace_item,
2535 num_uncorrectable_read_errors, 64);
2536 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2537 struct btrfs_dev_replace_item, cursor_left, 64);
2538 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2539 struct btrfs_dev_replace_item, cursor_right, 64);
2541 /* helper function to cast into the data area of the leaf. */
2542 #define btrfs_item_ptr(leaf, slot, type) \
2543 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2544 btrfs_item_offset_nr(leaf, slot)))
2546 #define btrfs_item_ptr_offset(leaf, slot) \
2547 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2548 btrfs_item_offset_nr(leaf, slot)))
2550 static inline u64 btrfs_name_hash(const char *name, int len)
2552 return crc32c((u32)~1, name, len);
2556 * Figure the key offset of an extended inode ref
2558 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2561 return (u64) crc32c(parent_objectid, name, len);
2564 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2566 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2567 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2570 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2572 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2577 enum btrfs_inline_ref_type {
2578 BTRFS_REF_TYPE_INVALID = 0,
2579 BTRFS_REF_TYPE_BLOCK = 1,
2580 BTRFS_REF_TYPE_DATA = 2,
2581 BTRFS_REF_TYPE_ANY = 3,
2584 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2585 struct btrfs_extent_inline_ref *iref,
2586 enum btrfs_inline_ref_type is_data);
2588 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2590 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2593 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2597 * Doing a truncate won't result in new nodes or leaves, just what we need for
2600 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2603 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2606 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2607 struct btrfs_fs_info *fs_info);
2608 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2609 struct btrfs_fs_info *fs_info);
2610 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2612 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2613 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2614 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2615 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2616 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2617 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2618 unsigned long count);
2619 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2620 unsigned long count, u64 transid, int wait);
2621 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2622 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2623 struct btrfs_fs_info *fs_info, u64 bytenr,
2624 u64 offset, int metadata, u64 *refs, u64 *flags);
2625 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2626 u64 bytenr, u64 num, int reserved);
2627 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2628 u64 bytenr, u64 num_bytes);
2629 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2630 struct extent_buffer *eb);
2631 int btrfs_cross_ref_exist(struct btrfs_root *root,
2632 u64 objectid, u64 offset, u64 bytenr);
2633 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2634 struct btrfs_fs_info *info,
2636 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2637 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2638 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2639 struct btrfs_root *root,
2640 u64 parent, u64 root_objectid,
2641 const struct btrfs_disk_key *key,
2642 int level, u64 hint,
2644 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2645 struct btrfs_root *root,
2646 struct extent_buffer *buf,
2647 u64 parent, int last_ref);
2648 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2649 struct btrfs_root *root, u64 owner,
2650 u64 offset, u64 ram_bytes,
2651 struct btrfs_key *ins);
2652 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2653 struct btrfs_fs_info *fs_info,
2654 u64 root_objectid, u64 owner, u64 offset,
2655 struct btrfs_key *ins);
2656 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2657 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2658 struct btrfs_key *ins, int is_data, int delalloc);
2659 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2660 struct extent_buffer *buf, int full_backref);
2661 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2662 struct extent_buffer *buf, int full_backref);
2663 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2664 struct btrfs_fs_info *fs_info,
2665 u64 bytenr, u64 num_bytes, u64 flags,
2666 int level, int is_data);
2667 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2668 struct btrfs_root *root,
2669 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2670 u64 owner, u64 offset);
2672 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2673 u64 start, u64 len, int delalloc);
2674 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2675 u64 start, u64 len);
2676 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2677 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2678 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2679 struct btrfs_root *root,
2680 u64 bytenr, u64 num_bytes, u64 parent,
2681 u64 root_objectid, u64 owner, u64 offset);
2683 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2684 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2685 struct btrfs_fs_info *fs_info);
2686 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2687 struct btrfs_fs_info *fs_info);
2688 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2689 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2690 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2691 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2692 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2693 struct btrfs_fs_info *fs_info, u64 bytes_used,
2694 u64 type, u64 chunk_offset, u64 size);
2695 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2696 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2697 struct btrfs_fs_info *fs_info,
2698 const u64 chunk_offset);
2699 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2700 struct btrfs_fs_info *fs_info, u64 group_start,
2701 struct extent_map *em);
2702 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2703 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2704 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2705 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2706 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2707 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2708 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2709 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2711 enum btrfs_reserve_flush_enum {
2712 /* If we are in the transaction, we can't flush anything.*/
2713 BTRFS_RESERVE_NO_FLUSH,
2715 * Flushing delalloc may cause deadlock somewhere, in this
2716 * case, use FLUSH LIMIT
2718 BTRFS_RESERVE_FLUSH_LIMIT,
2719 BTRFS_RESERVE_FLUSH_ALL,
2722 enum btrfs_flush_state {
2723 FLUSH_DELAYED_ITEMS_NR = 1,
2724 FLUSH_DELAYED_ITEMS = 2,
2726 FLUSH_DELALLOC_WAIT = 4,
2731 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2732 int btrfs_check_data_free_space(struct inode *inode,
2733 struct extent_changeset **reserved, u64 start, u64 len);
2734 void btrfs_free_reserved_data_space(struct inode *inode,
2735 struct extent_changeset *reserved, u64 start, u64 len);
2736 void btrfs_delalloc_release_space(struct inode *inode,
2737 struct extent_changeset *reserved,
2738 u64 start, u64 len, bool qgroup_free);
2739 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2741 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2742 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2743 struct btrfs_inode *inode);
2744 void btrfs_orphan_release_metadata(struct btrfs_inode *inode);
2745 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2746 struct btrfs_block_rsv *rsv,
2748 u64 *qgroup_reserved, bool use_global_rsv);
2749 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2750 struct btrfs_block_rsv *rsv);
2751 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2754 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2755 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2757 int btrfs_delalloc_reserve_space(struct inode *inode,
2758 struct extent_changeset **reserved, u64 start, u64 len);
2759 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2760 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2761 unsigned short type);
2762 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2763 struct btrfs_block_rsv *rsv,
2764 unsigned short type);
2765 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2766 struct btrfs_block_rsv *rsv);
2767 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
2768 int btrfs_block_rsv_add(struct btrfs_root *root,
2769 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2770 enum btrfs_reserve_flush_enum flush);
2771 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2772 int btrfs_block_rsv_refill(struct btrfs_root *root,
2773 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2774 enum btrfs_reserve_flush_enum flush);
2775 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2776 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2778 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2779 struct btrfs_block_rsv *dest, u64 num_bytes,
2781 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2782 struct btrfs_block_rsv *block_rsv,
2784 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info,
2785 struct btrfs_block_group_cache *cache);
2786 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2787 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2788 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2789 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2790 u64 start, u64 end);
2791 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2792 u64 num_bytes, u64 *actual_bytes);
2793 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2794 struct btrfs_fs_info *fs_info, u64 type);
2795 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2797 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2798 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2799 struct btrfs_fs_info *fs_info);
2800 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2801 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2802 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2803 void check_system_chunk(struct btrfs_trans_handle *trans,
2804 struct btrfs_fs_info *fs_info, const u64 type);
2805 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2806 struct btrfs_fs_info *info, u64 start, u64 end);
2809 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2810 int level, int *slot);
2811 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2812 int btrfs_previous_item(struct btrfs_root *root,
2813 struct btrfs_path *path, u64 min_objectid,
2815 int btrfs_previous_extent_item(struct btrfs_root *root,
2816 struct btrfs_path *path, u64 min_objectid);
2817 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2818 struct btrfs_path *path,
2819 const struct btrfs_key *new_key);
2820 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2821 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2822 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2823 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2824 struct btrfs_key *key, int lowest_level,
2826 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2827 struct btrfs_path *path,
2829 enum btrfs_compare_tree_result {
2830 BTRFS_COMPARE_TREE_NEW,
2831 BTRFS_COMPARE_TREE_DELETED,
2832 BTRFS_COMPARE_TREE_CHANGED,
2833 BTRFS_COMPARE_TREE_SAME,
2835 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2836 struct btrfs_path *right_path,
2837 struct btrfs_key *key,
2838 enum btrfs_compare_tree_result result,
2840 int btrfs_compare_trees(struct btrfs_root *left_root,
2841 struct btrfs_root *right_root,
2842 btrfs_changed_cb_t cb, void *ctx);
2843 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2844 struct btrfs_root *root, struct extent_buffer *buf,
2845 struct extent_buffer *parent, int parent_slot,
2846 struct extent_buffer **cow_ret);
2847 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2848 struct btrfs_root *root,
2849 struct extent_buffer *buf,
2850 struct extent_buffer **cow_ret, u64 new_root_objectid);
2851 int btrfs_block_can_be_shared(struct btrfs_root *root,
2852 struct extent_buffer *buf);
2853 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2855 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2856 struct btrfs_path *path, u32 new_size, int from_end);
2857 int btrfs_split_item(struct btrfs_trans_handle *trans,
2858 struct btrfs_root *root,
2859 struct btrfs_path *path,
2860 const struct btrfs_key *new_key,
2861 unsigned long split_offset);
2862 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2863 struct btrfs_root *root,
2864 struct btrfs_path *path,
2865 const struct btrfs_key *new_key);
2866 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2867 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2868 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2869 const struct btrfs_key *key, struct btrfs_path *p,
2870 int ins_len, int cow);
2871 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2872 struct btrfs_path *p, u64 time_seq);
2873 int btrfs_search_slot_for_read(struct btrfs_root *root,
2874 const struct btrfs_key *key,
2875 struct btrfs_path *p, int find_higher,
2877 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2878 struct btrfs_root *root, struct extent_buffer *parent,
2879 int start_slot, u64 *last_ret,
2880 struct btrfs_key *progress);
2881 void btrfs_release_path(struct btrfs_path *p);
2882 struct btrfs_path *btrfs_alloc_path(void);
2883 void btrfs_free_path(struct btrfs_path *p);
2884 void btrfs_set_path_blocking(struct btrfs_path *p);
2885 void btrfs_clear_path_blocking(struct btrfs_path *p,
2886 struct extent_buffer *held, int held_rw);
2887 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2889 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2890 struct btrfs_path *path, int slot, int nr);
2891 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2892 struct btrfs_root *root,
2893 struct btrfs_path *path)
2895 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2898 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2899 const struct btrfs_key *cpu_key, u32 *data_size,
2900 u32 total_data, u32 total_size, int nr);
2901 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2902 const struct btrfs_key *key, void *data, u32 data_size);
2903 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2904 struct btrfs_root *root,
2905 struct btrfs_path *path,
2906 const struct btrfs_key *cpu_key, u32 *data_size,
2909 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2910 struct btrfs_root *root,
2911 struct btrfs_path *path,
2912 const struct btrfs_key *key,
2915 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2918 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2919 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2920 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2922 static inline int btrfs_next_old_item(struct btrfs_root *root,
2923 struct btrfs_path *p, u64 time_seq)
2926 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2927 return btrfs_next_old_leaf(root, p, time_seq);
2930 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2932 return btrfs_next_old_item(root, p, 0);
2934 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2935 struct extent_buffer *leaf);
2936 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2937 struct btrfs_block_rsv *block_rsv,
2938 int update_ref, int for_reloc);
2939 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2940 struct btrfs_root *root,
2941 struct extent_buffer *node,
2942 struct extent_buffer *parent);
2943 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2946 * Do it this way so we only ever do one test_bit in the normal case.
2948 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2949 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2957 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2958 * anything except sleeping. This function is used to check the status of
2961 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2963 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2966 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2968 kfree(fs_info->balance_ctl);
2969 kfree(fs_info->delayed_root);
2970 kfree(fs_info->extent_root);
2971 kfree(fs_info->tree_root);
2972 kfree(fs_info->chunk_root);
2973 kfree(fs_info->dev_root);
2974 kfree(fs_info->csum_root);
2975 kfree(fs_info->quota_root);
2976 kfree(fs_info->uuid_root);
2977 kfree(fs_info->free_space_root);
2978 kfree(fs_info->super_copy);
2979 kfree(fs_info->super_for_commit);
2980 security_free_mnt_opts(&fs_info->security_opts);
2984 /* tree mod log functions from ctree.c */
2985 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2986 struct seq_list *elem);
2987 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2988 struct seq_list *elem);
2989 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2992 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2993 struct btrfs_fs_info *fs_info,
2994 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2995 const char *name, int name_len);
2996 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2997 struct btrfs_fs_info *fs_info,
2998 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2999 const char *name, int name_len);
3000 int btrfs_del_root(struct btrfs_trans_handle *trans,
3001 struct btrfs_fs_info *fs_info, const struct btrfs_key *key);
3002 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3003 const struct btrfs_key *key,
3004 struct btrfs_root_item *item);
3005 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3006 struct btrfs_root *root,
3007 struct btrfs_key *key,
3008 struct btrfs_root_item *item);
3009 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3010 struct btrfs_path *path, struct btrfs_root_item *root_item,
3011 struct btrfs_key *root_key);
3012 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3013 void btrfs_set_root_node(struct btrfs_root_item *item,
3014 struct extent_buffer *node);
3015 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3016 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3017 struct btrfs_root *root);
3020 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3021 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
3023 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3024 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
3026 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3027 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3031 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3032 const char *name, int name_len);
3033 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3034 struct btrfs_root *root, const char *name,
3035 int name_len, struct btrfs_inode *dir,
3036 struct btrfs_key *location, u8 type, u64 index);
3037 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3038 struct btrfs_root *root,
3039 struct btrfs_path *path, u64 dir,
3040 const char *name, int name_len,
3042 struct btrfs_dir_item *
3043 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3044 struct btrfs_root *root,
3045 struct btrfs_path *path, u64 dir,
3046 u64 objectid, const char *name, int name_len,
3048 struct btrfs_dir_item *
3049 btrfs_search_dir_index_item(struct btrfs_root *root,
3050 struct btrfs_path *path, u64 dirid,
3051 const char *name, int name_len);
3052 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3053 struct btrfs_root *root,
3054 struct btrfs_path *path,
3055 struct btrfs_dir_item *di);
3056 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3057 struct btrfs_root *root,
3058 struct btrfs_path *path, u64 objectid,
3059 const char *name, u16 name_len,
3060 const void *data, u16 data_len);
3061 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3062 struct btrfs_root *root,
3063 struct btrfs_path *path, u64 dir,
3064 const char *name, u16 name_len,
3066 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3067 struct btrfs_path *path,
3072 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3073 struct btrfs_root *root, u64 offset);
3074 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3075 struct btrfs_root *root, u64 offset);
3076 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3079 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3080 struct btrfs_root *root,
3081 const char *name, int name_len,
3082 u64 inode_objectid, u64 ref_objectid, u64 index);
3083 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3084 struct btrfs_root *root,
3085 const char *name, int name_len,
3086 u64 inode_objectid, u64 ref_objectid, u64 *index);
3087 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3088 struct btrfs_root *root,
3089 struct btrfs_path *path, u64 objectid);
3090 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3091 *root, struct btrfs_path *path,
3092 struct btrfs_key *location, int mod);
3094 struct btrfs_inode_extref *
3095 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3096 struct btrfs_root *root,
3097 struct btrfs_path *path,
3098 const char *name, int name_len,
3099 u64 inode_objectid, u64 ref_objectid, int ins_len,
3102 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3104 int name_len, struct btrfs_inode_ref **ref_ret);
3105 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3106 u64 ref_objectid, const char *name,
3108 struct btrfs_inode_extref **extref_ret);
3111 struct btrfs_dio_private;
3112 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3113 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3114 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3115 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3116 u64 logical_offset);
3117 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3118 struct btrfs_root *root,
3119 u64 objectid, u64 pos,
3120 u64 disk_offset, u64 disk_num_bytes,
3121 u64 num_bytes, u64 offset, u64 ram_bytes,
3122 u8 compression, u8 encryption, u16 other_encoding);
3123 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3124 struct btrfs_root *root,
3125 struct btrfs_path *path, u64 objectid,
3126 u64 bytenr, int mod);
3127 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3128 struct btrfs_root *root,
3129 struct btrfs_ordered_sum *sums);
3130 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3131 u64 file_start, int contig);
3132 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3133 struct list_head *list, int search_commit);
3134 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3135 const struct btrfs_path *path,
3136 struct btrfs_file_extent_item *fi,
3137 const bool new_inline,
3138 struct extent_map *em);
3141 struct btrfs_delalloc_work {
3142 struct inode *inode;
3144 struct completion completion;
3145 struct list_head list;
3146 struct btrfs_work work;
3149 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3151 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3153 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3154 struct page *page, size_t pg_offset, u64 start,
3155 u64 len, int create);
3156 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3157 u64 *orig_start, u64 *orig_block_len,
3160 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3161 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3162 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_inode *dir, struct btrfs_inode *inode,
3165 const char *name, int name_len);
3166 int btrfs_add_link(struct btrfs_trans_handle *trans,
3167 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3168 const char *name, int name_len, int add_backref, u64 index);
3169 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3170 struct btrfs_root *root,
3171 struct inode *dir, u64 objectid,
3172 const char *name, int name_len);
3173 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3175 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3176 struct btrfs_root *root,
3177 struct inode *inode, u64 new_size,
3180 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3181 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3183 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3184 unsigned int extra_bits,
3185 struct extent_state **cached_state, int dedupe);
3186 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3187 struct btrfs_root *new_root,
3188 struct btrfs_root *parent_root,
3190 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3191 size_t size, struct bio *bio,
3192 unsigned long bio_flags);
3193 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end);
3194 int btrfs_page_mkwrite(struct vm_fault *vmf);
3195 int btrfs_readpage(struct file *file, struct page *page);
3196 void btrfs_evict_inode(struct inode *inode);
3197 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3198 struct inode *btrfs_alloc_inode(struct super_block *sb);
3199 void btrfs_destroy_inode(struct inode *inode);
3200 int btrfs_drop_inode(struct inode *inode);
3201 int __init btrfs_init_cachep(void);
3202 void __cold btrfs_destroy_cachep(void);
3203 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3204 struct btrfs_root *root, int *was_new);
3205 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3206 struct page *page, size_t pg_offset,
3207 u64 start, u64 end, int create);
3208 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3209 struct btrfs_root *root,
3210 struct inode *inode);
3211 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3212 struct btrfs_root *root, struct inode *inode);
3213 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3214 struct btrfs_inode *inode);
3215 int btrfs_orphan_cleanup(struct btrfs_root *root);
3216 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3217 struct btrfs_root *root);
3218 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3219 void btrfs_invalidate_inodes(struct btrfs_root *root);
3220 void btrfs_add_delayed_iput(struct inode *inode);
3221 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3222 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3223 u64 start, u64 num_bytes, u64 min_size,
3224 loff_t actual_len, u64 *alloc_hint);
3225 int btrfs_prealloc_file_range_trans(struct inode *inode,
3226 struct btrfs_trans_handle *trans, int mode,
3227 u64 start, u64 num_bytes, u64 min_size,
3228 loff_t actual_len, u64 *alloc_hint);
3229 extern const struct dentry_operations btrfs_dentry_operations;
3230 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3231 void btrfs_test_inode_set_ops(struct inode *inode);
3235 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3236 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3237 int btrfs_ioctl_get_supported_features(void __user *arg);
3238 void btrfs_update_iflags(struct inode *inode);
3239 int btrfs_is_empty_uuid(u8 *uuid);
3240 int btrfs_defrag_file(struct inode *inode, struct file *file,
3241 struct btrfs_ioctl_defrag_range_args *range,
3242 u64 newer_than, unsigned long max_pages);
3243 void btrfs_get_block_group_info(struct list_head *groups_list,
3244 struct btrfs_ioctl_space_info *space);
3245 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3246 struct btrfs_ioctl_balance_args *bargs);
3247 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
3248 struct file *dst_file, u64 dst_loff);
3251 int __init btrfs_auto_defrag_init(void);
3252 void __cold btrfs_auto_defrag_exit(void);
3253 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3254 struct btrfs_inode *inode);
3255 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3256 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3257 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3258 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3260 extern const struct file_operations btrfs_file_operations;
3261 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3262 struct btrfs_root *root, struct inode *inode,
3263 struct btrfs_path *path, u64 start, u64 end,
3264 u64 *drop_end, int drop_cache,
3266 u32 extent_item_size,
3268 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3269 struct btrfs_root *root, struct inode *inode, u64 start,
3270 u64 end, int drop_cache);
3271 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3272 struct btrfs_inode *inode, u64 start, u64 end);
3273 int btrfs_release_file(struct inode *inode, struct file *file);
3274 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3275 size_t num_pages, loff_t pos, size_t write_bytes,
3276 struct extent_state **cached);
3277 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3278 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3279 struct file *file_out, loff_t pos_out, u64 len);
3282 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3283 struct btrfs_root *root);
3286 int __init btrfs_init_sysfs(void);
3287 void __cold btrfs_exit_sysfs(void);
3288 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3289 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3292 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3293 unsigned long new_flags);
3294 int btrfs_sync_fs(struct super_block *sb, int wait);
3296 static inline __printf(2, 3) __cold
3297 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3301 #ifdef CONFIG_PRINTK
3304 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3306 #define btrfs_printk(fs_info, fmt, args...) \
3307 btrfs_no_printk(fs_info, fmt, ##args)
3310 #define btrfs_emerg(fs_info, fmt, args...) \
3311 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3312 #define btrfs_alert(fs_info, fmt, args...) \
3313 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3314 #define btrfs_crit(fs_info, fmt, args...) \
3315 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3316 #define btrfs_err(fs_info, fmt, args...) \
3317 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3318 #define btrfs_warn(fs_info, fmt, args...) \
3319 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3320 #define btrfs_notice(fs_info, fmt, args...) \
3321 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3322 #define btrfs_info(fs_info, fmt, args...) \
3323 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3326 * Wrappers that use printk_in_rcu
3328 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3329 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3330 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3331 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3332 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3333 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3334 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3335 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3336 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3337 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3338 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3339 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3340 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3341 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3344 * Wrappers that use a ratelimited printk_in_rcu
3346 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3347 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3348 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3349 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3350 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3351 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3352 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3353 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3354 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3355 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3356 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3357 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3358 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3359 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3362 * Wrappers that use a ratelimited printk
3364 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3365 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3366 #define btrfs_alert_rl(fs_info, fmt, args...) \
3367 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3368 #define btrfs_crit_rl(fs_info, fmt, args...) \
3369 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3370 #define btrfs_err_rl(fs_info, fmt, args...) \
3371 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3372 #define btrfs_warn_rl(fs_info, fmt, args...) \
3373 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3374 #define btrfs_notice_rl(fs_info, fmt, args...) \
3375 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3376 #define btrfs_info_rl(fs_info, fmt, args...) \
3377 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3379 #if defined(CONFIG_DYNAMIC_DEBUG)
3380 #define btrfs_debug(fs_info, fmt, args...) \
3382 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3383 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3384 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3386 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3388 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3389 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3390 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3392 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3394 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3395 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3396 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3399 #define btrfs_debug_rl(fs_info, fmt, args...) \
3401 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3402 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3403 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3406 #elif defined(DEBUG)
3407 #define btrfs_debug(fs_info, fmt, args...) \
3408 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3409 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3410 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3411 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3412 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3413 #define btrfs_debug_rl(fs_info, fmt, args...) \
3414 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3416 #define btrfs_debug(fs_info, fmt, args...) \
3417 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3418 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3419 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3420 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3421 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3422 #define btrfs_debug_rl(fs_info, fmt, args...) \
3423 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3426 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3429 btrfs_printk(fs_info, fmt, ##args); \
3430 rcu_read_unlock(); \
3433 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3435 static DEFINE_RATELIMIT_STATE(_rs, \
3436 DEFAULT_RATELIMIT_INTERVAL, \
3437 DEFAULT_RATELIMIT_BURST); \
3438 if (__ratelimit(&_rs)) \
3439 btrfs_printk(fs_info, fmt, ##args); \
3442 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3445 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3446 rcu_read_unlock(); \
3449 #ifdef CONFIG_BTRFS_ASSERT
3452 static inline void assfail(char *expr, char *file, int line)
3454 pr_err("assertion failed: %s, file: %s, line: %d\n",
3459 #define ASSERT(expr) \
3460 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3462 #define ASSERT(expr) ((void)0)
3467 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3468 unsigned int line, int errno, const char *fmt, ...);
3470 const char *btrfs_decode_error(int errno);
3473 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3474 const char *function,
3475 unsigned int line, int errno);
3478 * Call btrfs_abort_transaction as early as possible when an error condition is
3479 * detected, that way the exact line number is reported.
3481 #define btrfs_abort_transaction(trans, errno) \
3483 /* Report first abort since mount */ \
3484 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3485 &((trans)->fs_info->fs_state))) { \
3486 if ((errno) != -EIO) { \
3487 WARN(1, KERN_DEBUG \
3488 "BTRFS: Transaction aborted (error %d)\n", \
3491 btrfs_debug((trans)->fs_info, \
3492 "Transaction aborted (error %d)", \
3496 __btrfs_abort_transaction((trans), __func__, \
3497 __LINE__, (errno)); \
3500 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3502 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3503 (errno), fmt, ##args); \
3508 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3509 unsigned int line, int errno, const char *fmt, ...);
3511 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3512 * will panic(). Otherwise we BUG() here.
3514 #define btrfs_panic(fs_info, errno, fmt, args...) \
3516 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3521 /* compatibility and incompatibility defines */
3523 #define btrfs_set_fs_incompat(__fs_info, opt) \
3524 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3526 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3529 struct btrfs_super_block *disk_super;
3532 disk_super = fs_info->super_copy;
3533 features = btrfs_super_incompat_flags(disk_super);
3534 if (!(features & flag)) {
3535 spin_lock(&fs_info->super_lock);
3536 features = btrfs_super_incompat_flags(disk_super);
3537 if (!(features & flag)) {
3539 btrfs_set_super_incompat_flags(disk_super, features);
3540 btrfs_info(fs_info, "setting %llu feature flag",
3543 spin_unlock(&fs_info->super_lock);
3547 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3548 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3550 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3553 struct btrfs_super_block *disk_super;
3556 disk_super = fs_info->super_copy;
3557 features = btrfs_super_incompat_flags(disk_super);
3558 if (features & flag) {
3559 spin_lock(&fs_info->super_lock);
3560 features = btrfs_super_incompat_flags(disk_super);
3561 if (features & flag) {
3563 btrfs_set_super_incompat_flags(disk_super, features);
3564 btrfs_info(fs_info, "clearing %llu feature flag",
3567 spin_unlock(&fs_info->super_lock);
3571 #define btrfs_fs_incompat(fs_info, opt) \
3572 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3574 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3576 struct btrfs_super_block *disk_super;
3577 disk_super = fs_info->super_copy;
3578 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3581 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3582 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3584 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3587 struct btrfs_super_block *disk_super;
3590 disk_super = fs_info->super_copy;
3591 features = btrfs_super_compat_ro_flags(disk_super);
3592 if (!(features & flag)) {
3593 spin_lock(&fs_info->super_lock);
3594 features = btrfs_super_compat_ro_flags(disk_super);
3595 if (!(features & flag)) {
3597 btrfs_set_super_compat_ro_flags(disk_super, features);
3598 btrfs_info(fs_info, "setting %llu ro feature flag",
3601 spin_unlock(&fs_info->super_lock);
3605 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3606 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3608 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3611 struct btrfs_super_block *disk_super;
3614 disk_super = fs_info->super_copy;
3615 features = btrfs_super_compat_ro_flags(disk_super);
3616 if (features & flag) {
3617 spin_lock(&fs_info->super_lock);
3618 features = btrfs_super_compat_ro_flags(disk_super);
3619 if (features & flag) {
3621 btrfs_set_super_compat_ro_flags(disk_super, features);
3622 btrfs_info(fs_info, "clearing %llu ro feature flag",
3625 spin_unlock(&fs_info->super_lock);
3629 #define btrfs_fs_compat_ro(fs_info, opt) \
3630 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3632 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3634 struct btrfs_super_block *disk_super;
3635 disk_super = fs_info->super_copy;
3636 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3640 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3641 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3642 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3643 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3644 struct inode *inode, struct inode *dir);
3646 #define btrfs_get_acl NULL
3647 #define btrfs_set_acl NULL
3648 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3649 struct inode *inode, struct inode *dir)
3656 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3657 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3658 struct btrfs_root *root);
3659 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3660 struct btrfs_root *root);
3661 int btrfs_recover_relocation(struct btrfs_root *root);
3662 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3663 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3664 struct btrfs_root *root, struct extent_buffer *buf,
3665 struct extent_buffer *cow);
3666 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3667 u64 *bytes_to_reserve);
3668 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3669 struct btrfs_pending_snapshot *pending);
3672 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3673 u64 end, struct btrfs_scrub_progress *progress,
3674 int readonly, int is_dev_replace);
3675 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3676 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3677 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3678 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3679 struct btrfs_device *dev);
3680 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3681 struct btrfs_scrub_progress *progress);
3682 static inline void btrfs_init_full_stripe_locks_tree(
3683 struct btrfs_full_stripe_locks_tree *locks_root)
3685 locks_root->root = RB_ROOT;
3686 mutex_init(&locks_root->lock);
3690 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3691 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3692 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3694 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3696 btrfs_bio_counter_sub(fs_info, 1);
3700 struct reada_control {
3701 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3702 struct btrfs_key key_start;
3703 struct btrfs_key key_end; /* exclusive */
3706 wait_queue_head_t wait;
3708 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3709 struct btrfs_key *start, struct btrfs_key *end);
3710 int btrfs_reada_wait(void *handle);
3711 void btrfs_reada_detach(void *handle);
3712 int btree_readahead_hook(struct extent_buffer *eb, int err);
3714 static inline int is_fstree(u64 rootid)
3716 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3717 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3718 !btrfs_qgroup_level(rootid)))
3723 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3725 return signal_pending(current);
3728 /* Sanity test specific functions */
3729 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3730 void btrfs_test_destroy_inode(struct inode *inode);
3733 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3735 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3736 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3737 &fs_info->fs_state)))