2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/sched/signal.h>
24 #include <linux/highmem.h>
26 #include <linux/rwsem.h>
27 #include <linux/semaphore.h>
28 #include <linux/completion.h>
29 #include <linux/backing-dev.h>
30 #include <linux/wait.h>
31 #include <linux/slab.h>
32 #include <linux/kobject.h>
33 #include <trace/events/btrfs.h>
34 #include <asm/kmap_types.h>
35 #include <linux/pagemap.h>
36 #include <linux/btrfs.h>
37 #include <linux/btrfs_tree.h>
38 #include <linux/workqueue.h>
39 #include <linux/security.h>
40 #include <linux/sizes.h>
41 #include <linux/dynamic_debug.h>
42 #include <linux/refcount.h>
43 #include <linux/crc32c.h>
44 #include "extent_io.h"
45 #include "extent_map.h"
46 #include "async-thread.h"
48 struct btrfs_trans_handle;
49 struct btrfs_transaction;
50 struct btrfs_pending_snapshot;
51 extern struct kmem_cache *btrfs_trans_handle_cachep;
52 extern struct kmem_cache *btrfs_bit_radix_cachep;
53 extern struct kmem_cache *btrfs_path_cachep;
54 extern struct kmem_cache *btrfs_free_space_cachep;
55 struct btrfs_ordered_sum;
57 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
58 #define STATIC noinline
60 #define STATIC static noinline
63 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
65 #define BTRFS_MAX_MIRRORS 3
67 #define BTRFS_MAX_LEVEL 8
69 #define BTRFS_OLDEST_GENERATION 0ULL
71 #define BTRFS_COMPAT_EXTENT_TREE_V0
74 * the max metadata block size. This limit is somewhat artificial,
75 * but the memmove costs go through the roof for larger blocks.
77 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
80 * we can actually store much bigger names, but lets not confuse the rest
83 #define BTRFS_NAME_LEN 255
86 * Theoretical limit is larger, but we keep this down to a sane
87 * value. That should limit greatly the possibility of collisions on
90 #define BTRFS_LINK_MAX 65535U
92 /* four bytes for CRC32 */
93 static const int btrfs_csum_sizes[] = { 4 };
95 #define BTRFS_EMPTY_DIR_SIZE 0
97 /* ioprio of readahead is set to idle */
98 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
100 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
106 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
108 static inline u32 count_max_extents(u64 size)
110 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
113 struct btrfs_mapping_tree {
114 struct extent_map_tree map_tree;
117 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
119 BUG_ON(num_stripes == 0);
120 return sizeof(struct btrfs_chunk) +
121 sizeof(struct btrfs_stripe) * (num_stripes - 1);
127 #define BTRFS_FS_STATE_ERROR 0
128 #define BTRFS_FS_STATE_REMOUNTING 1
129 #define BTRFS_FS_STATE_TRANS_ABORTED 2
130 #define BTRFS_FS_STATE_DEV_REPLACING 3
131 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
133 #define BTRFS_BACKREF_REV_MAX 256
134 #define BTRFS_BACKREF_REV_SHIFT 56
135 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
136 BTRFS_BACKREF_REV_SHIFT)
138 #define BTRFS_OLD_BACKREF_REV 0
139 #define BTRFS_MIXED_BACKREF_REV 1
142 * every tree block (leaf or node) starts with this header.
144 struct btrfs_header {
145 /* these first four must match the super block */
146 u8 csum[BTRFS_CSUM_SIZE];
147 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
148 __le64 bytenr; /* which block this node is supposed to live in */
151 /* allowed to be different from the super from here on down */
152 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
157 } __attribute__ ((__packed__));
160 * this is a very generous portion of the super block, giving us
161 * room to translate 14 chunks with 3 stripes each.
163 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
166 * just in case we somehow lose the roots and are not able to mount,
167 * we store an array of the roots from previous transactions
170 #define BTRFS_NUM_BACKUP_ROOTS 4
171 struct btrfs_root_backup {
173 __le64 tree_root_gen;
176 __le64 chunk_root_gen;
179 __le64 extent_root_gen;
188 __le64 csum_root_gen;
198 u8 extent_root_level;
202 /* future and to align */
204 } __attribute__ ((__packed__));
207 * the super block basically lists the main trees of the FS
208 * it currently lacks any block count etc etc
210 struct btrfs_super_block {
211 u8 csum[BTRFS_CSUM_SIZE];
212 /* the first 4 fields must match struct btrfs_header */
213 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
214 __le64 bytenr; /* this block number */
217 /* allowed to be different from the btrfs_header from here own down */
224 /* this will help find the new super based on the log root */
225 __le64 log_root_transid;
228 __le64 root_dir_objectid;
232 __le32 __unused_leafsize;
234 __le32 sys_chunk_array_size;
235 __le64 chunk_root_generation;
237 __le64 compat_ro_flags;
238 __le64 incompat_flags;
243 struct btrfs_dev_item dev_item;
245 char label[BTRFS_LABEL_SIZE];
247 __le64 cache_generation;
248 __le64 uuid_tree_generation;
250 /* future expansion */
252 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
253 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
254 } __attribute__ ((__packed__));
257 * Compat flags that we support. If any incompat flags are set other than the
258 * ones specified below then we will fail to mount
260 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
261 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
262 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
264 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
265 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
266 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
268 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
269 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
271 #define BTRFS_FEATURE_INCOMPAT_SUPP \
272 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
273 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
274 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
275 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
276 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
277 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
278 BTRFS_FEATURE_INCOMPAT_RAID56 | \
279 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
280 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
281 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
283 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
284 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
285 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
288 * A leaf is full of items. offset and size tell us where to find
289 * the item in the leaf (relative to the start of the data area)
292 struct btrfs_disk_key key;
295 } __attribute__ ((__packed__));
298 * leaves have an item area and a data area:
299 * [item0, item1....itemN] [free space] [dataN...data1, data0]
301 * The data is separate from the items to get the keys closer together
305 struct btrfs_header header;
306 struct btrfs_item items[];
307 } __attribute__ ((__packed__));
310 * all non-leaf blocks are nodes, they hold only keys and pointers to
313 struct btrfs_key_ptr {
314 struct btrfs_disk_key key;
317 } __attribute__ ((__packed__));
320 struct btrfs_header header;
321 struct btrfs_key_ptr ptrs[];
322 } __attribute__ ((__packed__));
325 * btrfs_paths remember the path taken from the root down to the leaf.
326 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
327 * to any other levels that are present.
329 * The slots array records the index of the item or block pointer
330 * used while walking the tree.
332 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
334 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
335 int slots[BTRFS_MAX_LEVEL];
336 /* if there is real range locking, this locks field will change */
337 u8 locks[BTRFS_MAX_LEVEL];
339 /* keep some upper locks as we walk down */
343 * set by btrfs_split_item, tells search_slot to keep all locks
344 * and to force calls to keep space in the nodes
346 unsigned int search_for_split:1;
347 unsigned int keep_locks:1;
348 unsigned int skip_locking:1;
349 unsigned int leave_spinning:1;
350 unsigned int search_commit_root:1;
351 unsigned int need_commit_sem:1;
352 unsigned int skip_release_on_error:1;
354 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
355 sizeof(struct btrfs_item))
356 struct btrfs_dev_replace {
357 u64 replace_state; /* see #define above */
358 u64 time_started; /* seconds since 1-Jan-1970 */
359 u64 time_stopped; /* seconds since 1-Jan-1970 */
360 atomic64_t num_write_errors;
361 atomic64_t num_uncorrectable_read_errors;
364 u64 committed_cursor_left;
365 u64 cursor_left_last_write_of_item;
368 u64 cont_reading_from_srcdev_mode; /* see #define above */
371 int item_needs_writeback;
372 struct btrfs_device *srcdev;
373 struct btrfs_device *tgtdev;
376 atomic_t nesting_level;
377 struct mutex lock_finishing_cancel_unmount;
380 atomic_t blocking_readers;
381 wait_queue_head_t read_lock_wq;
383 struct btrfs_scrub_progress scrub_progress;
386 /* For raid type sysfs entries */
387 struct raid_kobject {
390 struct list_head list;
393 struct btrfs_space_info {
396 u64 total_bytes; /* total bytes in the space,
397 this doesn't take mirrors into account */
398 u64 bytes_used; /* total bytes used,
399 this doesn't take mirrors into account */
400 u64 bytes_pinned; /* total bytes pinned, will be freed when the
401 transaction finishes */
402 u64 bytes_reserved; /* total bytes the allocator has reserved for
403 current allocations */
404 u64 bytes_may_use; /* number of bytes that may be used for
405 delalloc/allocations */
406 u64 bytes_readonly; /* total bytes that are read only */
408 u64 max_extent_size; /* This will hold the maximum extent size of
409 the space info if we had an ENOSPC in the
412 unsigned int full:1; /* indicates that we cannot allocate any more
413 chunks for this space */
414 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
416 unsigned int flush:1; /* set if we are trying to make space */
418 unsigned int force_alloc; /* set if we need to force a chunk
419 alloc for this space */
421 u64 disk_used; /* total bytes used on disk */
422 u64 disk_total; /* total bytes on disk, takes mirrors into
428 * bytes_pinned is kept in line with what is actually pinned, as in
429 * we've called update_block_group and dropped the bytes_used counter
430 * and increased the bytes_pinned counter. However this means that
431 * bytes_pinned does not reflect the bytes that will be pinned once the
432 * delayed refs are flushed, so this counter is inc'ed every time we
433 * call btrfs_free_extent so it is a realtime count of what will be
434 * freed once the transaction is committed. It will be zeroed every
435 * time the transaction commits.
437 struct percpu_counter total_bytes_pinned;
439 struct list_head list;
440 /* Protected by the spinlock 'lock'. */
441 struct list_head ro_bgs;
442 struct list_head priority_tickets;
443 struct list_head tickets;
445 * tickets_id just indicates the next ticket will be handled, so note
446 * it's not stored per ticket.
450 struct rw_semaphore groups_sem;
451 /* for block groups in our same type */
452 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
453 wait_queue_head_t wait;
456 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
459 #define BTRFS_BLOCK_RSV_GLOBAL 1
460 #define BTRFS_BLOCK_RSV_DELALLOC 2
461 #define BTRFS_BLOCK_RSV_TRANS 3
462 #define BTRFS_BLOCK_RSV_CHUNK 4
463 #define BTRFS_BLOCK_RSV_DELOPS 5
464 #define BTRFS_BLOCK_RSV_EMPTY 6
465 #define BTRFS_BLOCK_RSV_TEMP 7
467 struct btrfs_block_rsv {
470 struct btrfs_space_info *space_info;
474 unsigned short failfast;
478 * free clusters are used to claim free space in relatively large chunks,
479 * allowing us to do less seeky writes. They are used for all metadata
480 * allocations. In ssd_spread mode they are also used for data allocations.
482 struct btrfs_free_cluster {
484 spinlock_t refill_lock;
487 /* largest extent in this cluster */
490 /* first extent starting offset */
493 /* We did a full search and couldn't create a cluster */
496 struct btrfs_block_group_cache *block_group;
498 * when a cluster is allocated from a block group, we put the
499 * cluster onto a list in the block group so that it can
500 * be freed before the block group is freed.
502 struct list_head block_group_list;
505 enum btrfs_caching_type {
507 BTRFS_CACHE_STARTED = 1,
508 BTRFS_CACHE_FAST = 2,
509 BTRFS_CACHE_FINISHED = 3,
510 BTRFS_CACHE_ERROR = 4,
513 enum btrfs_disk_cache_state {
514 BTRFS_DC_WRITTEN = 0,
520 struct btrfs_caching_control {
521 struct list_head list;
523 wait_queue_head_t wait;
524 struct btrfs_work work;
525 struct btrfs_block_group_cache *block_group;
530 /* Once caching_thread() finds this much free space, it will wake up waiters. */
531 #define CACHING_CTL_WAKE_UP SZ_2M
533 struct btrfs_io_ctl {
537 struct btrfs_fs_info *fs_info;
544 unsigned check_crcs:1;
548 * Tree to record all locked full stripes of a RAID5/6 block group
550 struct btrfs_full_stripe_locks_tree {
555 struct btrfs_block_group_cache {
556 struct btrfs_key key;
557 struct btrfs_block_group_item item;
558 struct btrfs_fs_info *fs_info;
566 u64 cache_generation;
569 * If the free space extent count exceeds this number, convert the block
572 u32 bitmap_high_thresh;
575 * If the free space extent count drops below this number, convert the
576 * block group back to extents.
578 u32 bitmap_low_thresh;
581 * It is just used for the delayed data space allocation because
582 * only the data space allocation and the relative metadata update
583 * can be done cross the transaction.
585 struct rw_semaphore data_rwsem;
587 /* for raid56, this is a full stripe, without parity */
588 unsigned long full_stripe_len;
592 unsigned int has_caching_ctl:1;
593 unsigned int removed:1;
595 int disk_cache_state;
597 /* cache tracking stuff */
599 struct btrfs_caching_control *caching_ctl;
600 u64 last_byte_to_unpin;
602 struct btrfs_space_info *space_info;
604 /* free space cache stuff */
605 struct btrfs_free_space_ctl *free_space_ctl;
607 /* block group cache stuff */
608 struct rb_node cache_node;
610 /* for block groups in the same raid type */
611 struct list_head list;
616 /* List of struct btrfs_free_clusters for this block group.
617 * Today it will only have one thing on it, but that may change
619 struct list_head cluster_list;
621 /* For delayed block group creation or deletion of empty block groups */
622 struct list_head bg_list;
624 /* For read-only block groups */
625 struct list_head ro_list;
629 /* For dirty block groups */
630 struct list_head dirty_list;
631 struct list_head io_list;
633 struct btrfs_io_ctl io_ctl;
636 * Incremented when doing extent allocations and holding a read lock
637 * on the space_info's groups_sem semaphore.
638 * Decremented when an ordered extent that represents an IO against this
639 * block group's range is created (after it's added to its inode's
640 * root's list of ordered extents) or immediately after the allocation
641 * if it's a metadata extent or fallocate extent (for these cases we
642 * don't create ordered extents).
644 atomic_t reservations;
647 * Incremented while holding the spinlock *lock* by a task checking if
648 * it can perform a nocow write (incremented if the value for the *ro*
649 * field is 0). Decremented by such tasks once they create an ordered
650 * extent or before that if some error happens before reaching that step.
651 * This is to prevent races between block group relocation and nocow
652 * writes through direct IO.
654 atomic_t nocow_writers;
656 /* Lock for free space tree operations. */
657 struct mutex free_space_lock;
660 * Does the block group need to be added to the free space tree?
661 * Protected by free_space_lock.
663 int needs_free_space;
665 /* Record locked full stripes for RAID5/6 block group */
666 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
669 /* delayed seq elem */
671 struct list_head list;
675 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
677 #define SEQ_LAST ((u64)-1)
679 enum btrfs_orphan_cleanup_state {
680 ORPHAN_CLEANUP_STARTED = 1,
681 ORPHAN_CLEANUP_DONE = 2,
684 /* used by the raid56 code to lock stripes for read/modify/write */
685 struct btrfs_stripe_hash {
686 struct list_head hash_list;
690 /* used by the raid56 code to lock stripes for read/modify/write */
691 struct btrfs_stripe_hash_table {
692 struct list_head stripe_cache;
693 spinlock_t cache_lock;
695 struct btrfs_stripe_hash table[];
698 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
700 void btrfs_init_async_reclaim_work(struct work_struct *work);
703 struct reloc_control;
705 struct btrfs_fs_devices;
706 struct btrfs_balance_control;
707 struct btrfs_delayed_root;
709 #define BTRFS_FS_BARRIER 1
710 #define BTRFS_FS_CLOSING_START 2
711 #define BTRFS_FS_CLOSING_DONE 3
712 #define BTRFS_FS_LOG_RECOVERING 4
713 #define BTRFS_FS_OPEN 5
714 #define BTRFS_FS_QUOTA_ENABLED 6
715 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
716 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
717 #define BTRFS_FS_BTREE_ERR 11
718 #define BTRFS_FS_LOG1_ERR 12
719 #define BTRFS_FS_LOG2_ERR 13
720 #define BTRFS_FS_QUOTA_OVERRIDE 14
721 /* Used to record internally whether fs has been frozen */
722 #define BTRFS_FS_FROZEN 15
725 * Indicate that a whole-filesystem exclusive operation is running
726 * (device replace, resize, device add/delete, balance)
728 #define BTRFS_FS_EXCL_OP 16
730 struct btrfs_fs_info {
731 u8 fsid[BTRFS_FSID_SIZE];
732 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
734 struct btrfs_root *extent_root;
735 struct btrfs_root *tree_root;
736 struct btrfs_root *chunk_root;
737 struct btrfs_root *dev_root;
738 struct btrfs_root *fs_root;
739 struct btrfs_root *csum_root;
740 struct btrfs_root *quota_root;
741 struct btrfs_root *uuid_root;
742 struct btrfs_root *free_space_root;
744 /* the log root tree is a directory of all the other log roots */
745 struct btrfs_root *log_root_tree;
747 spinlock_t fs_roots_radix_lock;
748 struct radix_tree_root fs_roots_radix;
750 /* block group cache stuff */
751 spinlock_t block_group_cache_lock;
752 u64 first_logical_byte;
753 struct rb_root block_group_cache_tree;
755 /* keep track of unallocated space */
756 atomic64_t free_chunk_space;
758 struct extent_io_tree freed_extents[2];
759 struct extent_io_tree *pinned_extents;
761 /* logical->physical extent mapping */
762 struct btrfs_mapping_tree mapping_tree;
765 * block reservation for extent, checksum, root tree and
766 * delayed dir index item
768 struct btrfs_block_rsv global_block_rsv;
769 /* block reservation for metadata operations */
770 struct btrfs_block_rsv trans_block_rsv;
771 /* block reservation for chunk tree */
772 struct btrfs_block_rsv chunk_block_rsv;
773 /* block reservation for delayed operations */
774 struct btrfs_block_rsv delayed_block_rsv;
776 struct btrfs_block_rsv empty_block_rsv;
779 u64 last_trans_committed;
780 u64 avg_delayed_ref_runtime;
783 * this is updated to the current trans every time a full commit
784 * is required instead of the faster short fsync log commits
786 u64 last_trans_log_full_commit;
787 unsigned long mount_opt;
789 * Track requests for actions that need to be done during transaction
790 * commit (like for some mount options).
792 unsigned long pending_changes;
793 unsigned long compress_type:4;
794 unsigned int compress_level;
797 * It is a suggestive number, the read side is safe even it gets a
798 * wrong number because we will write out the data into a regular
799 * extent. The write side(mount/remount) is under ->s_umount lock,
800 * so it is also safe.
804 struct btrfs_transaction *running_transaction;
805 wait_queue_head_t transaction_throttle;
806 wait_queue_head_t transaction_wait;
807 wait_queue_head_t transaction_blocked_wait;
808 wait_queue_head_t async_submit_wait;
811 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
812 * when they are updated.
814 * Because we do not clear the flags for ever, so we needn't use
815 * the lock on the read side.
817 * We also needn't use the lock when we mount the fs, because
818 * there is no other task which will update the flag.
820 spinlock_t super_lock;
821 struct btrfs_super_block *super_copy;
822 struct btrfs_super_block *super_for_commit;
823 struct super_block *sb;
824 struct inode *btree_inode;
825 struct mutex tree_log_mutex;
826 struct mutex transaction_kthread_mutex;
827 struct mutex cleaner_mutex;
828 struct mutex chunk_mutex;
829 struct mutex volume_mutex;
832 * this is taken to make sure we don't set block groups ro after
833 * the free space cache has been allocated on them
835 struct mutex ro_block_group_mutex;
837 /* this is used during read/modify/write to make sure
838 * no two ios are trying to mod the same stripe at the same
841 struct btrfs_stripe_hash_table *stripe_hash_table;
844 * this protects the ordered operations list only while we are
845 * processing all of the entries on it. This way we make
846 * sure the commit code doesn't find the list temporarily empty
847 * because another function happens to be doing non-waiting preflush
848 * before jumping into the main commit.
850 struct mutex ordered_operations_mutex;
852 struct rw_semaphore commit_root_sem;
854 struct rw_semaphore cleanup_work_sem;
856 struct rw_semaphore subvol_sem;
857 struct srcu_struct subvol_srcu;
859 spinlock_t trans_lock;
861 * the reloc mutex goes with the trans lock, it is taken
862 * during commit to protect us from the relocation code
864 struct mutex reloc_mutex;
866 struct list_head trans_list;
867 struct list_head dead_roots;
868 struct list_head caching_block_groups;
870 spinlock_t delayed_iput_lock;
871 struct list_head delayed_iputs;
872 struct mutex cleaner_delayed_iput_mutex;
874 /* this protects tree_mod_seq_list */
875 spinlock_t tree_mod_seq_lock;
876 atomic64_t tree_mod_seq;
877 struct list_head tree_mod_seq_list;
879 /* this protects tree_mod_log */
880 rwlock_t tree_mod_log_lock;
881 struct rb_root tree_mod_log;
883 atomic_t async_delalloc_pages;
886 * this is used to protect the following list -- ordered_roots.
888 spinlock_t ordered_root_lock;
891 * all fs/file tree roots in which there are data=ordered extents
892 * pending writeback are added into this list.
894 * these can span multiple transactions and basically include
895 * every dirty data page that isn't from nodatacow
897 struct list_head ordered_roots;
899 struct mutex delalloc_root_mutex;
900 spinlock_t delalloc_root_lock;
901 /* all fs/file tree roots that have delalloc inodes. */
902 struct list_head delalloc_roots;
905 * there is a pool of worker threads for checksumming during writes
906 * and a pool for checksumming after reads. This is because readers
907 * can run with FS locks held, and the writers may be waiting for
908 * those locks. We don't want ordering in the pending list to cause
909 * deadlocks, and so the two are serviced separately.
911 * A third pool does submit_bio to avoid deadlocking with the other
914 struct btrfs_workqueue *workers;
915 struct btrfs_workqueue *delalloc_workers;
916 struct btrfs_workqueue *flush_workers;
917 struct btrfs_workqueue *endio_workers;
918 struct btrfs_workqueue *endio_meta_workers;
919 struct btrfs_workqueue *endio_raid56_workers;
920 struct btrfs_workqueue *endio_repair_workers;
921 struct btrfs_workqueue *rmw_workers;
922 struct btrfs_workqueue *endio_meta_write_workers;
923 struct btrfs_workqueue *endio_write_workers;
924 struct btrfs_workqueue *endio_freespace_worker;
925 struct btrfs_workqueue *submit_workers;
926 struct btrfs_workqueue *caching_workers;
927 struct btrfs_workqueue *readahead_workers;
930 * fixup workers take dirty pages that didn't properly go through
931 * the cow mechanism and make them safe to write. It happens
932 * for the sys_munmap function call path
934 struct btrfs_workqueue *fixup_workers;
935 struct btrfs_workqueue *delayed_workers;
937 /* the extent workers do delayed refs on the extent allocation tree */
938 struct btrfs_workqueue *extent_workers;
939 struct task_struct *transaction_kthread;
940 struct task_struct *cleaner_kthread;
941 u32 thread_pool_size;
943 struct kobject *space_info_kobj;
944 struct list_head pending_raid_kobjs;
945 spinlock_t pending_raid_kobjs_lock; /* uncontended */
949 /* used to keep from writing metadata until there is a nice batch */
950 struct percpu_counter dirty_metadata_bytes;
951 struct percpu_counter delalloc_bytes;
952 s32 dirty_metadata_batch;
955 struct list_head dirty_cowonly_roots;
957 struct btrfs_fs_devices *fs_devices;
960 * The space_info list is effectively read only after initial
961 * setup. It is populated at mount time and cleaned up after
962 * all block groups are removed. RCU is used to protect it.
964 struct list_head space_info;
966 struct btrfs_space_info *data_sinfo;
968 struct reloc_control *reloc_ctl;
970 /* data_alloc_cluster is only used in ssd_spread mode */
971 struct btrfs_free_cluster data_alloc_cluster;
973 /* all metadata allocations go through this cluster */
974 struct btrfs_free_cluster meta_alloc_cluster;
976 /* auto defrag inodes go here */
977 spinlock_t defrag_inodes_lock;
978 struct rb_root defrag_inodes;
979 atomic_t defrag_running;
981 /* Used to protect avail_{data, metadata, system}_alloc_bits */
982 seqlock_t profiles_lock;
984 * these three are in extended format (availability of single
985 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
986 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
988 u64 avail_data_alloc_bits;
989 u64 avail_metadata_alloc_bits;
990 u64 avail_system_alloc_bits;
992 /* restriper state */
993 spinlock_t balance_lock;
994 struct mutex balance_mutex;
995 atomic_t balance_running;
996 atomic_t balance_pause_req;
997 atomic_t balance_cancel_req;
998 struct btrfs_balance_control *balance_ctl;
999 wait_queue_head_t balance_wait_q;
1001 u32 data_chunk_allocations;
1006 /* private scrub information */
1007 struct mutex scrub_lock;
1008 atomic_t scrubs_running;
1009 atomic_t scrub_pause_req;
1010 atomic_t scrubs_paused;
1011 atomic_t scrub_cancel_req;
1012 wait_queue_head_t scrub_pause_wait;
1013 int scrub_workers_refcnt;
1014 struct btrfs_workqueue *scrub_workers;
1015 struct btrfs_workqueue *scrub_wr_completion_workers;
1016 struct btrfs_workqueue *scrub_nocow_workers;
1017 struct btrfs_workqueue *scrub_parity_workers;
1019 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1020 u32 check_integrity_print_mask;
1022 /* is qgroup tracking in a consistent state? */
1025 /* holds configuration and tracking. Protected by qgroup_lock */
1026 struct rb_root qgroup_tree;
1027 struct rb_root qgroup_op_tree;
1028 spinlock_t qgroup_lock;
1029 spinlock_t qgroup_op_lock;
1030 atomic_t qgroup_op_seq;
1033 * used to avoid frequently calling ulist_alloc()/ulist_free()
1034 * when doing qgroup accounting, it must be protected by qgroup_lock.
1036 struct ulist *qgroup_ulist;
1038 /* protect user change for quota operations */
1039 struct mutex qgroup_ioctl_lock;
1041 /* list of dirty qgroups to be written at next commit */
1042 struct list_head dirty_qgroups;
1044 /* used by qgroup for an efficient tree traversal */
1047 /* qgroup rescan items */
1048 struct mutex qgroup_rescan_lock; /* protects the progress item */
1049 struct btrfs_key qgroup_rescan_progress;
1050 struct btrfs_workqueue *qgroup_rescan_workers;
1051 struct completion qgroup_rescan_completion;
1052 struct btrfs_work qgroup_rescan_work;
1053 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1055 /* filesystem state */
1056 unsigned long fs_state;
1058 struct btrfs_delayed_root *delayed_root;
1060 /* readahead tree */
1061 spinlock_t reada_lock;
1062 struct radix_tree_root reada_tree;
1064 /* readahead works cnt */
1065 atomic_t reada_works_cnt;
1067 /* Extent buffer radix tree */
1068 spinlock_t buffer_lock;
1069 struct radix_tree_root buffer_radix;
1071 /* next backup root to be overwritten */
1072 int backup_root_index;
1074 /* device replace state */
1075 struct btrfs_dev_replace dev_replace;
1077 struct percpu_counter bio_counter;
1078 wait_queue_head_t replace_wait;
1080 struct semaphore uuid_tree_rescan_sem;
1082 /* Used to reclaim the metadata space in the background. */
1083 struct work_struct async_reclaim_work;
1085 spinlock_t unused_bgs_lock;
1086 struct list_head unused_bgs;
1087 struct mutex unused_bg_unpin_mutex;
1088 struct mutex delete_unused_bgs_mutex;
1090 /* For btrfs to record security options */
1091 struct security_mnt_opts security_opts;
1094 * Chunks that can't be freed yet (under a trim/discard operation)
1095 * and will be latter freed. Protected by fs_info->chunk_mutex.
1097 struct list_head pinned_chunks;
1099 /* Cached block sizes */
1104 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1105 spinlock_t ref_verify_lock;
1106 struct rb_root block_tree;
1110 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1112 return sb->s_fs_info;
1115 struct btrfs_subvolume_writers {
1116 struct percpu_counter counter;
1117 wait_queue_head_t wait;
1121 * The state of btrfs root
1124 * btrfs_record_root_in_trans is a multi-step process,
1125 * and it can race with the balancing code. But the
1126 * race is very small, and only the first time the root
1127 * is added to each transaction. So IN_TRANS_SETUP
1128 * is used to tell us when more checks are required
1130 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1131 #define BTRFS_ROOT_REF_COWS 1
1132 #define BTRFS_ROOT_TRACK_DIRTY 2
1133 #define BTRFS_ROOT_IN_RADIX 3
1134 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1135 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1136 #define BTRFS_ROOT_FORCE_COW 6
1137 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1138 #define BTRFS_ROOT_DIRTY 8
1141 * in ram representation of the tree. extent_root is used for all allocations
1142 * and for the extent tree extent_root root.
1145 struct extent_buffer *node;
1147 struct extent_buffer *commit_root;
1148 struct btrfs_root *log_root;
1149 struct btrfs_root *reloc_root;
1151 unsigned long state;
1152 struct btrfs_root_item root_item;
1153 struct btrfs_key root_key;
1154 struct btrfs_fs_info *fs_info;
1155 struct extent_io_tree dirty_log_pages;
1157 struct mutex objectid_mutex;
1159 spinlock_t accounting_lock;
1160 struct btrfs_block_rsv *block_rsv;
1162 /* free ino cache stuff */
1163 struct btrfs_free_space_ctl *free_ino_ctl;
1164 enum btrfs_caching_type ino_cache_state;
1165 spinlock_t ino_cache_lock;
1166 wait_queue_head_t ino_cache_wait;
1167 struct btrfs_free_space_ctl *free_ino_pinned;
1168 u64 ino_cache_progress;
1169 struct inode *ino_cache_inode;
1171 struct mutex log_mutex;
1172 wait_queue_head_t log_writer_wait;
1173 wait_queue_head_t log_commit_wait[2];
1174 struct list_head log_ctxs[2];
1175 atomic_t log_writers;
1176 atomic_t log_commit[2];
1179 /* No matter the commit succeeds or not*/
1180 int log_transid_committed;
1181 /* Just be updated when the commit succeeds. */
1182 int last_log_commit;
1183 pid_t log_start_pid;
1190 u64 highest_objectid;
1192 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1193 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1197 u64 defrag_trans_start;
1198 struct btrfs_key defrag_progress;
1199 struct btrfs_key defrag_max;
1202 /* the dirty list is only used by non-reference counted roots */
1203 struct list_head dirty_list;
1205 struct list_head root_list;
1207 spinlock_t log_extents_lock[2];
1208 struct list_head logged_list[2];
1210 spinlock_t orphan_lock;
1211 atomic_t orphan_inodes;
1212 struct btrfs_block_rsv *orphan_block_rsv;
1213 int orphan_cleanup_state;
1215 spinlock_t inode_lock;
1216 /* red-black tree that keeps track of in-memory inodes */
1217 struct rb_root inode_tree;
1220 * radix tree that keeps track of delayed nodes of every inode,
1221 * protected by inode_lock
1223 struct radix_tree_root delayed_nodes_tree;
1225 * right now this just gets used so that a root has its own devid
1226 * for stat. It may be used for more later
1230 spinlock_t root_item_lock;
1233 struct mutex delalloc_mutex;
1234 spinlock_t delalloc_lock;
1236 * all of the inodes that have delalloc bytes. It is possible for
1237 * this list to be empty even when there is still dirty data=ordered
1238 * extents waiting to finish IO.
1240 struct list_head delalloc_inodes;
1241 struct list_head delalloc_root;
1242 u64 nr_delalloc_inodes;
1244 struct mutex ordered_extent_mutex;
1246 * this is used by the balancing code to wait for all the pending
1249 spinlock_t ordered_extent_lock;
1252 * all of the data=ordered extents pending writeback
1253 * these can span multiple transactions and basically include
1254 * every dirty data page that isn't from nodatacow
1256 struct list_head ordered_extents;
1257 struct list_head ordered_root;
1258 u64 nr_ordered_extents;
1261 * Number of currently running SEND ioctls to prevent
1262 * manipulation with the read-only status via SUBVOL_SETFLAGS
1264 int send_in_progress;
1265 struct btrfs_subvolume_writers *subv_writers;
1266 atomic_t will_be_snapshotted;
1268 /* For qgroup metadata reserved space */
1269 spinlock_t qgroup_meta_rsv_lock;
1270 u64 qgroup_meta_rsv_pertrans;
1271 u64 qgroup_meta_rsv_prealloc;
1274 struct btrfs_file_private {
1278 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1280 return btrfs_sb(inode->i_sb)->sectorsize;
1283 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1286 return info->nodesize - sizeof(struct btrfs_header);
1289 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1291 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1293 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1296 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1298 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1301 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1302 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1303 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1305 return BTRFS_MAX_ITEM_SIZE(info) -
1306 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1309 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1311 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1315 * Flags for mount options.
1317 * Note: don't forget to add new options to btrfs_show_options()
1319 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1320 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1321 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1322 #define BTRFS_MOUNT_SSD (1 << 3)
1323 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1324 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1325 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1326 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1327 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1328 #define BTRFS_MOUNT_NOSSD (1 << 9)
1329 #define BTRFS_MOUNT_DISCARD (1 << 10)
1330 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1331 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1332 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1333 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1334 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1335 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1336 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1337 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1338 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1339 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1340 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1341 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1342 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1343 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1344 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1345 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1346 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1347 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1349 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1350 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1352 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1353 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1354 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1355 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1358 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1360 if (!btrfs_test_opt(fs_info, opt)) \
1361 btrfs_info(fs_info, fmt, ##args); \
1362 btrfs_set_opt(fs_info->mount_opt, opt); \
1365 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1367 if (btrfs_test_opt(fs_info, opt)) \
1368 btrfs_info(fs_info, fmt, ##args); \
1369 btrfs_clear_opt(fs_info->mount_opt, opt); \
1372 #ifdef CONFIG_BTRFS_DEBUG
1374 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1376 struct btrfs_fs_info *fs_info = block_group->fs_info;
1378 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1379 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1380 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1381 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1386 * Requests for changes that need to be done during transaction commit.
1388 * Internal mount options that are used for special handling of the real
1389 * mount options (eg. cannot be set during remount and have to be set during
1390 * transaction commit)
1393 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1394 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1395 #define BTRFS_PENDING_COMMIT (2)
1397 #define btrfs_test_pending(info, opt) \
1398 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1399 #define btrfs_set_pending(info, opt) \
1400 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1401 #define btrfs_clear_pending(info, opt) \
1402 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1405 * Helpers for setting pending mount option changes.
1407 * Expects corresponding macros
1408 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1410 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1412 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1413 btrfs_info((info), fmt, ##args); \
1414 btrfs_set_pending((info), SET_##opt); \
1415 btrfs_clear_pending((info), CLEAR_##opt); \
1419 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1421 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1422 btrfs_info((info), fmt, ##args); \
1423 btrfs_set_pending((info), CLEAR_##opt); \
1424 btrfs_clear_pending((info), SET_##opt); \
1431 #define BTRFS_INODE_NODATASUM (1 << 0)
1432 #define BTRFS_INODE_NODATACOW (1 << 1)
1433 #define BTRFS_INODE_READONLY (1 << 2)
1434 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1435 #define BTRFS_INODE_PREALLOC (1 << 4)
1436 #define BTRFS_INODE_SYNC (1 << 5)
1437 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1438 #define BTRFS_INODE_APPEND (1 << 7)
1439 #define BTRFS_INODE_NODUMP (1 << 8)
1440 #define BTRFS_INODE_NOATIME (1 << 9)
1441 #define BTRFS_INODE_DIRSYNC (1 << 10)
1442 #define BTRFS_INODE_COMPRESS (1 << 11)
1444 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1446 struct btrfs_map_token {
1447 const struct extent_buffer *eb;
1449 unsigned long offset;
1452 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1453 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1455 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1457 token->kaddr = NULL;
1460 /* some macros to generate set/get functions for the struct fields. This
1461 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1464 #define le8_to_cpu(v) (v)
1465 #define cpu_to_le8(v) (v)
1468 #define read_eb_member(eb, ptr, type, member, result) (\
1469 read_extent_buffer(eb, (char *)(result), \
1470 ((unsigned long)(ptr)) + \
1471 offsetof(type, member), \
1472 sizeof(((type *)0)->member)))
1474 #define write_eb_member(eb, ptr, type, member, result) (\
1475 write_extent_buffer(eb, (char *)(result), \
1476 ((unsigned long)(ptr)) + \
1477 offsetof(type, member), \
1478 sizeof(((type *)0)->member)))
1480 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1481 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1482 const void *ptr, unsigned long off, \
1483 struct btrfs_map_token *token); \
1484 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1485 unsigned long off, u##bits val, \
1486 struct btrfs_map_token *token); \
1487 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1489 unsigned long off) \
1491 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1493 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1494 unsigned long off, u##bits val) \
1496 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1499 DECLARE_BTRFS_SETGET_BITS(8)
1500 DECLARE_BTRFS_SETGET_BITS(16)
1501 DECLARE_BTRFS_SETGET_BITS(32)
1502 DECLARE_BTRFS_SETGET_BITS(64)
1504 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1505 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1508 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1509 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1511 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1514 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1515 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1517 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1519 struct btrfs_map_token *token) \
1521 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1522 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1524 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1525 type *s, u##bits val, \
1526 struct btrfs_map_token *token) \
1528 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1529 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1532 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1533 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1535 const type *p = page_address(eb->pages[0]); \
1536 u##bits res = le##bits##_to_cpu(p->member); \
1539 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1542 type *p = page_address(eb->pages[0]); \
1543 p->member = cpu_to_le##bits(val); \
1546 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1547 static inline u##bits btrfs_##name(const type *s) \
1549 return le##bits##_to_cpu(s->member); \
1551 static inline void btrfs_set_##name(type *s, u##bits val) \
1553 s->member = cpu_to_le##bits(val); \
1557 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1558 struct btrfs_dev_item *s)
1560 BUILD_BUG_ON(sizeof(u64) !=
1561 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1562 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1565 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1566 struct btrfs_dev_item *s,
1569 BUILD_BUG_ON(sizeof(u64) !=
1570 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1571 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1572 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1576 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1577 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1578 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1579 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1580 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1582 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1583 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1584 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1585 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1586 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1587 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1589 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1590 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1592 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1594 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1596 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1598 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1600 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1601 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1603 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1605 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1607 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1610 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1612 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1615 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1617 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1620 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1621 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1622 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1623 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1624 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1625 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1626 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1627 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1628 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1629 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1630 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1632 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1634 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1637 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1638 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1639 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1641 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1643 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1645 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1647 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1648 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1650 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1652 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1653 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1655 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1658 unsigned long offset = (unsigned long)c;
1659 offset += offsetof(struct btrfs_chunk, stripe);
1660 offset += nr * sizeof(struct btrfs_stripe);
1661 return (struct btrfs_stripe *)offset;
1664 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1666 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1669 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1670 struct btrfs_chunk *c, int nr)
1672 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1675 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1676 struct btrfs_chunk *c, int nr)
1678 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1681 /* struct btrfs_block_group_item */
1682 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1684 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1686 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1687 struct btrfs_block_group_item, chunk_objectid, 64);
1689 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1690 struct btrfs_block_group_item, chunk_objectid, 64);
1691 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1692 struct btrfs_block_group_item, flags, 64);
1693 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1694 struct btrfs_block_group_item, flags, 64);
1696 /* struct btrfs_free_space_info */
1697 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1699 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1701 /* struct btrfs_inode_ref */
1702 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1703 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1705 /* struct btrfs_inode_extref */
1706 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1707 parent_objectid, 64);
1708 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1710 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1712 /* struct btrfs_inode_item */
1713 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1714 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1715 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1716 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1717 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1718 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1719 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1720 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1721 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1722 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1723 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1724 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1725 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1727 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1729 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1731 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1732 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1734 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1736 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1737 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1738 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1739 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1740 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1741 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1742 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1743 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1744 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1745 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1747 /* struct btrfs_dev_extent */
1748 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1750 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1751 chunk_objectid, 64);
1752 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1754 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1756 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1758 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1759 return (unsigned long)dev + ptr;
1762 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1763 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1765 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1767 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1770 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1772 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1773 struct btrfs_tree_block_info *item,
1774 struct btrfs_disk_key *key)
1776 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1779 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1780 struct btrfs_tree_block_info *item,
1781 struct btrfs_disk_key *key)
1783 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1786 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1788 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1790 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1792 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1795 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1798 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1800 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1803 static inline u32 btrfs_extent_inline_ref_size(int type)
1805 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1806 type == BTRFS_SHARED_BLOCK_REF_KEY)
1807 return sizeof(struct btrfs_extent_inline_ref);
1808 if (type == BTRFS_SHARED_DATA_REF_KEY)
1809 return sizeof(struct btrfs_shared_data_ref) +
1810 sizeof(struct btrfs_extent_inline_ref);
1811 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1812 return sizeof(struct btrfs_extent_data_ref) +
1813 offsetof(struct btrfs_extent_inline_ref, offset);
1817 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1818 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1820 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1821 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1823 /* struct btrfs_node */
1824 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1825 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1826 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1828 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1831 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1834 ptr = offsetof(struct btrfs_node, ptrs) +
1835 sizeof(struct btrfs_key_ptr) * nr;
1836 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1839 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1843 ptr = offsetof(struct btrfs_node, ptrs) +
1844 sizeof(struct btrfs_key_ptr) * nr;
1845 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1848 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1851 ptr = offsetof(struct btrfs_node, ptrs) +
1852 sizeof(struct btrfs_key_ptr) * nr;
1853 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1856 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1860 ptr = offsetof(struct btrfs_node, ptrs) +
1861 sizeof(struct btrfs_key_ptr) * nr;
1862 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1865 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1867 return offsetof(struct btrfs_node, ptrs) +
1868 sizeof(struct btrfs_key_ptr) * nr;
1871 void btrfs_node_key(const struct extent_buffer *eb,
1872 struct btrfs_disk_key *disk_key, int nr);
1874 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1875 struct btrfs_disk_key *disk_key, int nr)
1878 ptr = btrfs_node_key_ptr_offset(nr);
1879 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1880 struct btrfs_key_ptr, key, disk_key);
1883 /* struct btrfs_item */
1884 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1885 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1886 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1887 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1889 static inline unsigned long btrfs_item_nr_offset(int nr)
1891 return offsetof(struct btrfs_leaf, items) +
1892 sizeof(struct btrfs_item) * nr;
1895 static inline struct btrfs_item *btrfs_item_nr(int nr)
1897 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1900 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1901 struct btrfs_item *item)
1903 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1906 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1908 return btrfs_item_end(eb, btrfs_item_nr(nr));
1911 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1913 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1916 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1918 return btrfs_item_size(eb, btrfs_item_nr(nr));
1921 static inline void btrfs_item_key(const struct extent_buffer *eb,
1922 struct btrfs_disk_key *disk_key, int nr)
1924 struct btrfs_item *item = btrfs_item_nr(nr);
1925 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1928 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1929 struct btrfs_disk_key *disk_key, int nr)
1931 struct btrfs_item *item = btrfs_item_nr(nr);
1932 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1935 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1938 * struct btrfs_root_ref
1940 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1941 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1942 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1944 /* struct btrfs_dir_item */
1945 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1946 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1947 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1948 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1949 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1950 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1952 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1954 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1957 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1958 const struct btrfs_dir_item *item,
1959 struct btrfs_disk_key *key)
1961 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1964 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1965 struct btrfs_dir_item *item,
1966 const struct btrfs_disk_key *key)
1968 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1971 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1973 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1975 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1978 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1979 const struct btrfs_free_space_header *h,
1980 struct btrfs_disk_key *key)
1982 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1985 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1986 struct btrfs_free_space_header *h,
1987 const struct btrfs_disk_key *key)
1989 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1992 /* struct btrfs_disk_key */
1993 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1995 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1996 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1998 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1999 const struct btrfs_disk_key *disk)
2001 cpu->offset = le64_to_cpu(disk->offset);
2002 cpu->type = disk->type;
2003 cpu->objectid = le64_to_cpu(disk->objectid);
2006 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2007 const struct btrfs_key *cpu)
2009 disk->offset = cpu_to_le64(cpu->offset);
2010 disk->type = cpu->type;
2011 disk->objectid = cpu_to_le64(cpu->objectid);
2014 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2015 struct btrfs_key *key, int nr)
2017 struct btrfs_disk_key disk_key;
2018 btrfs_node_key(eb, &disk_key, nr);
2019 btrfs_disk_key_to_cpu(key, &disk_key);
2022 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2023 struct btrfs_key *key, int nr)
2025 struct btrfs_disk_key disk_key;
2026 btrfs_item_key(eb, &disk_key, nr);
2027 btrfs_disk_key_to_cpu(key, &disk_key);
2030 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2031 const struct btrfs_dir_item *item,
2032 struct btrfs_key *key)
2034 struct btrfs_disk_key disk_key;
2035 btrfs_dir_item_key(eb, item, &disk_key);
2036 btrfs_disk_key_to_cpu(key, &disk_key);
2039 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2044 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2049 /* struct btrfs_header */
2050 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2051 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2053 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2054 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2055 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2056 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2057 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2059 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2060 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2062 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2064 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2066 return (btrfs_header_flags(eb) & flag) == flag;
2069 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2071 u64 flags = btrfs_header_flags(eb);
2072 btrfs_set_header_flags(eb, flags | flag);
2073 return (flags & flag) == flag;
2076 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2078 u64 flags = btrfs_header_flags(eb);
2079 btrfs_set_header_flags(eb, flags & ~flag);
2080 return (flags & flag) == flag;
2083 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2085 u64 flags = btrfs_header_flags(eb);
2086 return flags >> BTRFS_BACKREF_REV_SHIFT;
2089 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2092 u64 flags = btrfs_header_flags(eb);
2093 flags &= ~BTRFS_BACKREF_REV_MASK;
2094 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2095 btrfs_set_header_flags(eb, flags);
2098 static inline unsigned long btrfs_header_fsid(void)
2100 return offsetof(struct btrfs_header, fsid);
2103 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2105 return offsetof(struct btrfs_header, chunk_tree_uuid);
2108 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2110 return btrfs_header_level(eb) == 0;
2113 /* struct btrfs_root_item */
2114 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2116 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2117 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2118 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2120 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2122 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2123 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2124 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2125 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2126 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2127 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2128 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2129 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2131 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2133 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2135 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2137 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2139 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2142 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2144 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2147 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2149 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2152 /* struct btrfs_root_backup */
2153 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2155 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2157 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2158 tree_root_level, 8);
2160 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2162 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2163 chunk_root_gen, 64);
2164 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2165 chunk_root_level, 8);
2167 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2169 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2170 extent_root_gen, 64);
2171 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2172 extent_root_level, 8);
2174 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2176 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2178 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2181 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2183 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2185 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2188 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2190 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2192 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2193 csum_root_level, 8);
2194 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2196 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2198 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2201 /* struct btrfs_balance_item */
2202 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2204 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2205 const struct btrfs_balance_item *bi,
2206 struct btrfs_disk_balance_args *ba)
2208 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2211 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2212 struct btrfs_balance_item *bi,
2213 const struct btrfs_disk_balance_args *ba)
2215 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2218 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2219 const struct btrfs_balance_item *bi,
2220 struct btrfs_disk_balance_args *ba)
2222 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2225 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2226 struct btrfs_balance_item *bi,
2227 const struct btrfs_disk_balance_args *ba)
2229 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2232 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2233 const struct btrfs_balance_item *bi,
2234 struct btrfs_disk_balance_args *ba)
2236 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2239 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2240 struct btrfs_balance_item *bi,
2241 const struct btrfs_disk_balance_args *ba)
2243 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2247 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2248 const struct btrfs_disk_balance_args *disk)
2250 memset(cpu, 0, sizeof(*cpu));
2252 cpu->profiles = le64_to_cpu(disk->profiles);
2253 cpu->usage = le64_to_cpu(disk->usage);
2254 cpu->devid = le64_to_cpu(disk->devid);
2255 cpu->pstart = le64_to_cpu(disk->pstart);
2256 cpu->pend = le64_to_cpu(disk->pend);
2257 cpu->vstart = le64_to_cpu(disk->vstart);
2258 cpu->vend = le64_to_cpu(disk->vend);
2259 cpu->target = le64_to_cpu(disk->target);
2260 cpu->flags = le64_to_cpu(disk->flags);
2261 cpu->limit = le64_to_cpu(disk->limit);
2262 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2263 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2267 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2268 const struct btrfs_balance_args *cpu)
2270 memset(disk, 0, sizeof(*disk));
2272 disk->profiles = cpu_to_le64(cpu->profiles);
2273 disk->usage = cpu_to_le64(cpu->usage);
2274 disk->devid = cpu_to_le64(cpu->devid);
2275 disk->pstart = cpu_to_le64(cpu->pstart);
2276 disk->pend = cpu_to_le64(cpu->pend);
2277 disk->vstart = cpu_to_le64(cpu->vstart);
2278 disk->vend = cpu_to_le64(cpu->vend);
2279 disk->target = cpu_to_le64(cpu->target);
2280 disk->flags = cpu_to_le64(cpu->flags);
2281 disk->limit = cpu_to_le64(cpu->limit);
2282 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2283 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2286 /* struct btrfs_super_block */
2287 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2288 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2289 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2291 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2292 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2293 struct btrfs_super_block, sys_chunk_array_size, 32);
2294 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2295 struct btrfs_super_block, chunk_root_generation, 64);
2296 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2298 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2300 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2301 chunk_root_level, 8);
2302 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2304 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2305 log_root_transid, 64);
2306 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2308 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2310 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2312 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2314 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2316 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2318 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2319 root_dir_objectid, 64);
2320 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2322 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2324 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2325 compat_ro_flags, 64);
2326 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2327 incompat_flags, 64);
2328 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2330 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2331 cache_generation, 64);
2332 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2333 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2334 uuid_tree_generation, 64);
2336 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2338 u16 t = btrfs_super_csum_type(s);
2340 * csum type is validated at mount time
2342 return btrfs_csum_sizes[t];
2347 * The leaf data grows from end-to-front in the node.
2348 * this returns the address of the start of the last item,
2349 * which is the stop of the leaf data stack
2351 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2352 const struct extent_buffer *leaf)
2354 u32 nr = btrfs_header_nritems(leaf);
2357 return BTRFS_LEAF_DATA_SIZE(fs_info);
2358 return btrfs_item_offset_nr(leaf, nr - 1);
2361 /* struct btrfs_file_extent_item */
2362 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2363 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2364 struct btrfs_file_extent_item, disk_bytenr, 64);
2365 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2366 struct btrfs_file_extent_item, offset, 64);
2367 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2368 struct btrfs_file_extent_item, generation, 64);
2369 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2370 struct btrfs_file_extent_item, num_bytes, 64);
2371 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2372 struct btrfs_file_extent_item, disk_num_bytes, 64);
2373 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2374 struct btrfs_file_extent_item, compression, 8);
2376 static inline unsigned long
2377 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2379 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2382 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2384 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2387 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2389 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2391 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2392 disk_num_bytes, 64);
2393 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2395 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2397 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2399 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2401 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2403 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2404 other_encoding, 16);
2407 * this returns the number of bytes used by the item on disk, minus the
2408 * size of any extent headers. If a file is compressed on disk, this is
2409 * the compressed size
2411 static inline u32 btrfs_file_extent_inline_item_len(
2412 const struct extent_buffer *eb,
2413 struct btrfs_item *e)
2415 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2418 /* this returns the number of file bytes represented by the inline item.
2419 * If an item is compressed, this is the uncompressed size
2421 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb,
2423 const struct btrfs_file_extent_item *fi)
2425 struct btrfs_map_token token;
2427 btrfs_init_map_token(&token);
2429 * return the space used on disk if this item isn't
2430 * compressed or encoded
2432 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
2433 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
2434 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
2435 return btrfs_file_extent_inline_item_len(eb,
2436 btrfs_item_nr(slot));
2439 /* otherwise use the ram bytes field */
2440 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
2444 /* btrfs_dev_stats_item */
2445 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2446 const struct btrfs_dev_stats_item *ptr,
2451 read_extent_buffer(eb, &val,
2452 offsetof(struct btrfs_dev_stats_item, values) +
2453 ((unsigned long)ptr) + (index * sizeof(u64)),
2458 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2459 struct btrfs_dev_stats_item *ptr,
2462 write_extent_buffer(eb, &val,
2463 offsetof(struct btrfs_dev_stats_item, values) +
2464 ((unsigned long)ptr) + (index * sizeof(u64)),
2468 /* btrfs_qgroup_status_item */
2469 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2471 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2473 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2475 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2478 /* btrfs_qgroup_info_item */
2479 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2481 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2482 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2484 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2485 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2488 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2489 struct btrfs_qgroup_info_item, generation, 64);
2490 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2492 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2493 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2494 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2496 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2497 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2499 /* btrfs_qgroup_limit_item */
2500 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2502 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2504 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2506 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2508 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2511 /* btrfs_dev_replace_item */
2512 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2513 struct btrfs_dev_replace_item, src_devid, 64);
2514 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2515 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2517 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2519 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2521 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2523 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2524 num_write_errors, 64);
2525 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2526 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2528 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2530 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2534 struct btrfs_dev_replace_item, src_devid, 64);
2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2536 struct btrfs_dev_replace_item,
2537 cont_reading_from_srcdev_mode, 64);
2538 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2539 struct btrfs_dev_replace_item, replace_state, 64);
2540 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2541 struct btrfs_dev_replace_item, time_started, 64);
2542 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2543 struct btrfs_dev_replace_item, time_stopped, 64);
2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2545 struct btrfs_dev_replace_item, num_write_errors, 64);
2546 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2547 struct btrfs_dev_replace_item,
2548 num_uncorrectable_read_errors, 64);
2549 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2550 struct btrfs_dev_replace_item, cursor_left, 64);
2551 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2552 struct btrfs_dev_replace_item, cursor_right, 64);
2554 /* helper function to cast into the data area of the leaf. */
2555 #define btrfs_item_ptr(leaf, slot, type) \
2556 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2557 btrfs_item_offset_nr(leaf, slot)))
2559 #define btrfs_item_ptr_offset(leaf, slot) \
2560 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2561 btrfs_item_offset_nr(leaf, slot)))
2563 static inline u64 btrfs_name_hash(const char *name, int len)
2565 return crc32c((u32)~1, name, len);
2569 * Figure the key offset of an extended inode ref
2571 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2574 return (u64) crc32c(parent_objectid, name, len);
2577 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2579 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2580 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2583 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2585 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2590 enum btrfs_inline_ref_type {
2591 BTRFS_REF_TYPE_INVALID = 0,
2592 BTRFS_REF_TYPE_BLOCK = 1,
2593 BTRFS_REF_TYPE_DATA = 2,
2594 BTRFS_REF_TYPE_ANY = 3,
2597 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2598 struct btrfs_extent_inline_ref *iref,
2599 enum btrfs_inline_ref_type is_data);
2601 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2603 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2606 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2610 * Doing a truncate won't result in new nodes or leaves, just what we need for
2613 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2616 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2619 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2620 struct btrfs_fs_info *fs_info);
2621 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2622 struct btrfs_fs_info *fs_info);
2623 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2625 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2626 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2627 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2628 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2629 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2630 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2631 unsigned long count);
2632 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2633 unsigned long count, u64 transid, int wait);
2634 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2635 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2636 struct btrfs_fs_info *fs_info, u64 bytenr,
2637 u64 offset, int metadata, u64 *refs, u64 *flags);
2638 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2639 u64 bytenr, u64 num, int reserved);
2640 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2641 u64 bytenr, u64 num_bytes);
2642 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2643 struct extent_buffer *eb);
2644 int btrfs_cross_ref_exist(struct btrfs_root *root,
2645 u64 objectid, u64 offset, u64 bytenr);
2646 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2647 struct btrfs_fs_info *info,
2649 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2650 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2651 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2652 struct btrfs_root *root,
2653 u64 parent, u64 root_objectid,
2654 const struct btrfs_disk_key *key,
2655 int level, u64 hint,
2657 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2658 struct btrfs_root *root,
2659 struct extent_buffer *buf,
2660 u64 parent, int last_ref);
2661 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2662 struct btrfs_root *root, u64 owner,
2663 u64 offset, u64 ram_bytes,
2664 struct btrfs_key *ins);
2665 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2666 struct btrfs_fs_info *fs_info,
2667 u64 root_objectid, u64 owner, u64 offset,
2668 struct btrfs_key *ins);
2669 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2670 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2671 struct btrfs_key *ins, int is_data, int delalloc);
2672 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2673 struct extent_buffer *buf, int full_backref);
2674 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2675 struct extent_buffer *buf, int full_backref);
2676 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2677 struct btrfs_fs_info *fs_info,
2678 u64 bytenr, u64 num_bytes, u64 flags,
2679 int level, int is_data);
2680 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2681 struct btrfs_root *root,
2682 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2683 u64 owner, u64 offset);
2685 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2686 u64 start, u64 len, int delalloc);
2687 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2688 u64 start, u64 len);
2689 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2690 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2691 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2692 struct btrfs_root *root,
2693 u64 bytenr, u64 num_bytes, u64 parent,
2694 u64 root_objectid, u64 owner, u64 offset);
2696 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2697 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2698 struct btrfs_fs_info *fs_info);
2699 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2700 struct btrfs_fs_info *fs_info);
2701 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2702 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2703 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2704 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2705 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2706 struct btrfs_fs_info *fs_info, u64 bytes_used,
2707 u64 type, u64 chunk_offset, u64 size);
2708 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2709 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2710 struct btrfs_fs_info *fs_info,
2711 const u64 chunk_offset);
2712 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2713 struct btrfs_fs_info *fs_info, u64 group_start,
2714 struct extent_map *em);
2715 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2716 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2717 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2718 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2719 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2720 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2721 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2722 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2724 enum btrfs_reserve_flush_enum {
2725 /* If we are in the transaction, we can't flush anything.*/
2726 BTRFS_RESERVE_NO_FLUSH,
2728 * Flushing delalloc may cause deadlock somewhere, in this
2729 * case, use FLUSH LIMIT
2731 BTRFS_RESERVE_FLUSH_LIMIT,
2732 BTRFS_RESERVE_FLUSH_ALL,
2735 enum btrfs_flush_state {
2736 FLUSH_DELAYED_ITEMS_NR = 1,
2737 FLUSH_DELAYED_ITEMS = 2,
2739 FLUSH_DELALLOC_WAIT = 4,
2744 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2745 int btrfs_check_data_free_space(struct inode *inode,
2746 struct extent_changeset **reserved, u64 start, u64 len);
2747 void btrfs_free_reserved_data_space(struct inode *inode,
2748 struct extent_changeset *reserved, u64 start, u64 len);
2749 void btrfs_delalloc_release_space(struct inode *inode,
2750 struct extent_changeset *reserved,
2751 u64 start, u64 len, bool qgroup_free);
2752 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2754 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2755 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2756 struct btrfs_inode *inode);
2757 void btrfs_orphan_release_metadata(struct btrfs_inode *inode);
2758 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2759 struct btrfs_block_rsv *rsv,
2761 u64 *qgroup_reserved, bool use_global_rsv);
2762 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2763 struct btrfs_block_rsv *rsv);
2764 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2767 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2768 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2770 int btrfs_delalloc_reserve_space(struct inode *inode,
2771 struct extent_changeset **reserved, u64 start, u64 len);
2772 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2773 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2774 unsigned short type);
2775 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2776 struct btrfs_block_rsv *rsv,
2777 unsigned short type);
2778 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2779 struct btrfs_block_rsv *rsv);
2780 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
2781 int btrfs_block_rsv_add(struct btrfs_root *root,
2782 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2783 enum btrfs_reserve_flush_enum flush);
2784 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2785 int btrfs_block_rsv_refill(struct btrfs_root *root,
2786 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2787 enum btrfs_reserve_flush_enum flush);
2788 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2789 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2791 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2792 struct btrfs_block_rsv *dest, u64 num_bytes,
2794 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2795 struct btrfs_block_rsv *block_rsv,
2797 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info,
2798 struct btrfs_block_group_cache *cache);
2799 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2800 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2801 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2802 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2803 u64 start, u64 end);
2804 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2805 u64 num_bytes, u64 *actual_bytes);
2806 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2807 struct btrfs_fs_info *fs_info, u64 type);
2808 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2810 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2811 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2812 struct btrfs_fs_info *fs_info);
2813 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2814 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2815 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2816 void check_system_chunk(struct btrfs_trans_handle *trans,
2817 struct btrfs_fs_info *fs_info, const u64 type);
2818 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2819 struct btrfs_fs_info *info, u64 start, u64 end);
2822 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2823 int level, int *slot);
2824 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2825 int btrfs_previous_item(struct btrfs_root *root,
2826 struct btrfs_path *path, u64 min_objectid,
2828 int btrfs_previous_extent_item(struct btrfs_root *root,
2829 struct btrfs_path *path, u64 min_objectid);
2830 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2831 struct btrfs_path *path,
2832 const struct btrfs_key *new_key);
2833 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2834 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2835 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2836 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2837 struct btrfs_key *key, int lowest_level,
2839 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2840 struct btrfs_path *path,
2842 enum btrfs_compare_tree_result {
2843 BTRFS_COMPARE_TREE_NEW,
2844 BTRFS_COMPARE_TREE_DELETED,
2845 BTRFS_COMPARE_TREE_CHANGED,
2846 BTRFS_COMPARE_TREE_SAME,
2848 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2849 struct btrfs_path *right_path,
2850 struct btrfs_key *key,
2851 enum btrfs_compare_tree_result result,
2853 int btrfs_compare_trees(struct btrfs_root *left_root,
2854 struct btrfs_root *right_root,
2855 btrfs_changed_cb_t cb, void *ctx);
2856 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2857 struct btrfs_root *root, struct extent_buffer *buf,
2858 struct extent_buffer *parent, int parent_slot,
2859 struct extent_buffer **cow_ret);
2860 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2861 struct btrfs_root *root,
2862 struct extent_buffer *buf,
2863 struct extent_buffer **cow_ret, u64 new_root_objectid);
2864 int btrfs_block_can_be_shared(struct btrfs_root *root,
2865 struct extent_buffer *buf);
2866 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2868 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2869 struct btrfs_path *path, u32 new_size, int from_end);
2870 int btrfs_split_item(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root,
2872 struct btrfs_path *path,
2873 const struct btrfs_key *new_key,
2874 unsigned long split_offset);
2875 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2876 struct btrfs_root *root,
2877 struct btrfs_path *path,
2878 const struct btrfs_key *new_key);
2879 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2880 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2881 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2882 const struct btrfs_key *key, struct btrfs_path *p,
2883 int ins_len, int cow);
2884 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2885 struct btrfs_path *p, u64 time_seq);
2886 int btrfs_search_slot_for_read(struct btrfs_root *root,
2887 const struct btrfs_key *key,
2888 struct btrfs_path *p, int find_higher,
2890 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2891 struct btrfs_root *root, struct extent_buffer *parent,
2892 int start_slot, u64 *last_ret,
2893 struct btrfs_key *progress);
2894 void btrfs_release_path(struct btrfs_path *p);
2895 struct btrfs_path *btrfs_alloc_path(void);
2896 void btrfs_free_path(struct btrfs_path *p);
2897 void btrfs_set_path_blocking(struct btrfs_path *p);
2898 void btrfs_clear_path_blocking(struct btrfs_path *p,
2899 struct extent_buffer *held, int held_rw);
2900 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2902 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2903 struct btrfs_path *path, int slot, int nr);
2904 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2905 struct btrfs_root *root,
2906 struct btrfs_path *path)
2908 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2911 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2912 const struct btrfs_key *cpu_key, u32 *data_size,
2913 u32 total_data, u32 total_size, int nr);
2914 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2915 const struct btrfs_key *key, void *data, u32 data_size);
2916 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2917 struct btrfs_root *root,
2918 struct btrfs_path *path,
2919 const struct btrfs_key *cpu_key, u32 *data_size,
2922 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2923 struct btrfs_root *root,
2924 struct btrfs_path *path,
2925 const struct btrfs_key *key,
2928 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2931 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2932 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2933 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2935 static inline int btrfs_next_old_item(struct btrfs_root *root,
2936 struct btrfs_path *p, u64 time_seq)
2939 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2940 return btrfs_next_old_leaf(root, p, time_seq);
2943 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2945 return btrfs_next_old_item(root, p, 0);
2947 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2948 struct extent_buffer *leaf);
2949 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2950 struct btrfs_block_rsv *block_rsv,
2951 int update_ref, int for_reloc);
2952 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2953 struct btrfs_root *root,
2954 struct extent_buffer *node,
2955 struct extent_buffer *parent);
2956 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2959 * Do it this way so we only ever do one test_bit in the normal case.
2961 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2962 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2970 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2971 * anything except sleeping. This function is used to check the status of
2974 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2976 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2979 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2981 kfree(fs_info->balance_ctl);
2982 kfree(fs_info->delayed_root);
2983 kfree(fs_info->extent_root);
2984 kfree(fs_info->tree_root);
2985 kfree(fs_info->chunk_root);
2986 kfree(fs_info->dev_root);
2987 kfree(fs_info->csum_root);
2988 kfree(fs_info->quota_root);
2989 kfree(fs_info->uuid_root);
2990 kfree(fs_info->free_space_root);
2991 kfree(fs_info->super_copy);
2992 kfree(fs_info->super_for_commit);
2993 security_free_mnt_opts(&fs_info->security_opts);
2997 /* tree mod log functions from ctree.c */
2998 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2999 struct seq_list *elem);
3000 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3001 struct seq_list *elem);
3002 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3005 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
3006 struct btrfs_fs_info *fs_info,
3007 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
3008 const char *name, int name_len);
3009 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
3010 struct btrfs_fs_info *fs_info,
3011 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
3012 const char *name, int name_len);
3013 int btrfs_del_root(struct btrfs_trans_handle *trans,
3014 struct btrfs_fs_info *fs_info, const struct btrfs_key *key);
3015 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3016 const struct btrfs_key *key,
3017 struct btrfs_root_item *item);
3018 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3019 struct btrfs_root *root,
3020 struct btrfs_key *key,
3021 struct btrfs_root_item *item);
3022 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3023 struct btrfs_path *path, struct btrfs_root_item *root_item,
3024 struct btrfs_key *root_key);
3025 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3026 void btrfs_set_root_node(struct btrfs_root_item *item,
3027 struct extent_buffer *node);
3028 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3029 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3030 struct btrfs_root *root);
3033 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3034 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
3036 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3037 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
3039 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3040 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3044 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3045 const char *name, int name_len);
3046 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3047 struct btrfs_root *root, const char *name,
3048 int name_len, struct btrfs_inode *dir,
3049 struct btrfs_key *location, u8 type, u64 index);
3050 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3051 struct btrfs_root *root,
3052 struct btrfs_path *path, u64 dir,
3053 const char *name, int name_len,
3055 struct btrfs_dir_item *
3056 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3057 struct btrfs_root *root,
3058 struct btrfs_path *path, u64 dir,
3059 u64 objectid, const char *name, int name_len,
3061 struct btrfs_dir_item *
3062 btrfs_search_dir_index_item(struct btrfs_root *root,
3063 struct btrfs_path *path, u64 dirid,
3064 const char *name, int name_len);
3065 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root,
3067 struct btrfs_path *path,
3068 struct btrfs_dir_item *di);
3069 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3070 struct btrfs_root *root,
3071 struct btrfs_path *path, u64 objectid,
3072 const char *name, u16 name_len,
3073 const void *data, u16 data_len);
3074 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3075 struct btrfs_root *root,
3076 struct btrfs_path *path, u64 dir,
3077 const char *name, u16 name_len,
3079 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3080 struct btrfs_path *path,
3085 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3086 struct btrfs_root *root, u64 offset);
3087 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3088 struct btrfs_root *root, u64 offset);
3089 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3092 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3093 struct btrfs_root *root,
3094 const char *name, int name_len,
3095 u64 inode_objectid, u64 ref_objectid, u64 index);
3096 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3097 struct btrfs_root *root,
3098 const char *name, int name_len,
3099 u64 inode_objectid, u64 ref_objectid, u64 *index);
3100 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3101 struct btrfs_root *root,
3102 struct btrfs_path *path, u64 objectid);
3103 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3104 *root, struct btrfs_path *path,
3105 struct btrfs_key *location, int mod);
3107 struct btrfs_inode_extref *
3108 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3109 struct btrfs_root *root,
3110 struct btrfs_path *path,
3111 const char *name, int name_len,
3112 u64 inode_objectid, u64 ref_objectid, int ins_len,
3115 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3117 int name_len, struct btrfs_inode_ref **ref_ret);
3118 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3119 u64 ref_objectid, const char *name,
3121 struct btrfs_inode_extref **extref_ret);
3124 struct btrfs_dio_private;
3125 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3126 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3127 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3128 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3129 u64 logical_offset);
3130 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3131 struct btrfs_root *root,
3132 u64 objectid, u64 pos,
3133 u64 disk_offset, u64 disk_num_bytes,
3134 u64 num_bytes, u64 offset, u64 ram_bytes,
3135 u8 compression, u8 encryption, u16 other_encoding);
3136 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3137 struct btrfs_root *root,
3138 struct btrfs_path *path, u64 objectid,
3139 u64 bytenr, int mod);
3140 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3141 struct btrfs_root *root,
3142 struct btrfs_ordered_sum *sums);
3143 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3144 u64 file_start, int contig);
3145 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3146 struct list_head *list, int search_commit);
3147 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3148 const struct btrfs_path *path,
3149 struct btrfs_file_extent_item *fi,
3150 const bool new_inline,
3151 struct extent_map *em);
3154 struct btrfs_delalloc_work {
3155 struct inode *inode;
3157 struct completion completion;
3158 struct list_head list;
3159 struct btrfs_work work;
3162 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3164 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3166 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3167 struct page *page, size_t pg_offset, u64 start,
3168 u64 len, int create);
3169 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3170 u64 *orig_start, u64 *orig_block_len,
3173 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3174 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3175 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3176 struct btrfs_root *root,
3177 struct btrfs_inode *dir, struct btrfs_inode *inode,
3178 const char *name, int name_len);
3179 int btrfs_add_link(struct btrfs_trans_handle *trans,
3180 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3181 const char *name, int name_len, int add_backref, u64 index);
3182 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3183 struct btrfs_root *root,
3184 struct inode *dir, u64 objectid,
3185 const char *name, int name_len);
3186 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3188 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3189 struct btrfs_root *root,
3190 struct inode *inode, u64 new_size,
3193 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3194 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3196 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3197 unsigned int extra_bits,
3198 struct extent_state **cached_state, int dedupe);
3199 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3200 struct btrfs_root *new_root,
3201 struct btrfs_root *parent_root,
3203 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3204 size_t size, struct bio *bio,
3205 unsigned long bio_flags);
3206 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end);
3207 int btrfs_page_mkwrite(struct vm_fault *vmf);
3208 int btrfs_readpage(struct file *file, struct page *page);
3209 void btrfs_evict_inode(struct inode *inode);
3210 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3211 struct inode *btrfs_alloc_inode(struct super_block *sb);
3212 void btrfs_destroy_inode(struct inode *inode);
3213 int btrfs_drop_inode(struct inode *inode);
3214 int __init btrfs_init_cachep(void);
3215 void __cold btrfs_destroy_cachep(void);
3216 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3217 struct btrfs_root *root, int *was_new);
3218 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3219 struct page *page, size_t pg_offset,
3220 u64 start, u64 end, int create);
3221 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3222 struct btrfs_root *root,
3223 struct inode *inode);
3224 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3225 struct btrfs_root *root, struct inode *inode);
3226 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3227 struct btrfs_inode *inode);
3228 int btrfs_orphan_cleanup(struct btrfs_root *root);
3229 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3230 struct btrfs_root *root);
3231 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3232 void btrfs_invalidate_inodes(struct btrfs_root *root);
3233 void btrfs_add_delayed_iput(struct inode *inode);
3234 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3235 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3236 u64 start, u64 num_bytes, u64 min_size,
3237 loff_t actual_len, u64 *alloc_hint);
3238 int btrfs_prealloc_file_range_trans(struct inode *inode,
3239 struct btrfs_trans_handle *trans, int mode,
3240 u64 start, u64 num_bytes, u64 min_size,
3241 loff_t actual_len, u64 *alloc_hint);
3242 extern const struct dentry_operations btrfs_dentry_operations;
3243 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3244 void btrfs_test_inode_set_ops(struct inode *inode);
3248 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3249 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3250 int btrfs_ioctl_get_supported_features(void __user *arg);
3251 void btrfs_update_iflags(struct inode *inode);
3252 int btrfs_is_empty_uuid(u8 *uuid);
3253 int btrfs_defrag_file(struct inode *inode, struct file *file,
3254 struct btrfs_ioctl_defrag_range_args *range,
3255 u64 newer_than, unsigned long max_pages);
3256 void btrfs_get_block_group_info(struct list_head *groups_list,
3257 struct btrfs_ioctl_space_info *space);
3258 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3259 struct btrfs_ioctl_balance_args *bargs);
3260 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
3261 struct file *dst_file, u64 dst_loff);
3264 int __init btrfs_auto_defrag_init(void);
3265 void __cold btrfs_auto_defrag_exit(void);
3266 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3267 struct btrfs_inode *inode);
3268 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3269 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3270 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3271 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3273 extern const struct file_operations btrfs_file_operations;
3274 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3275 struct btrfs_root *root, struct inode *inode,
3276 struct btrfs_path *path, u64 start, u64 end,
3277 u64 *drop_end, int drop_cache,
3279 u32 extent_item_size,
3281 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3282 struct btrfs_root *root, struct inode *inode, u64 start,
3283 u64 end, int drop_cache);
3284 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3285 struct btrfs_inode *inode, u64 start, u64 end);
3286 int btrfs_release_file(struct inode *inode, struct file *file);
3287 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3288 size_t num_pages, loff_t pos, size_t write_bytes,
3289 struct extent_state **cached);
3290 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3291 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3292 struct file *file_out, loff_t pos_out, u64 len);
3295 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3296 struct btrfs_root *root);
3299 int __init btrfs_init_sysfs(void);
3300 void __cold btrfs_exit_sysfs(void);
3301 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3302 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3305 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3306 unsigned long new_flags);
3307 int btrfs_sync_fs(struct super_block *sb, int wait);
3309 static inline __printf(2, 3) __cold
3310 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3314 #ifdef CONFIG_PRINTK
3317 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3319 #define btrfs_printk(fs_info, fmt, args...) \
3320 btrfs_no_printk(fs_info, fmt, ##args)
3323 #define btrfs_emerg(fs_info, fmt, args...) \
3324 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3325 #define btrfs_alert(fs_info, fmt, args...) \
3326 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3327 #define btrfs_crit(fs_info, fmt, args...) \
3328 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3329 #define btrfs_err(fs_info, fmt, args...) \
3330 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3331 #define btrfs_warn(fs_info, fmt, args...) \
3332 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3333 #define btrfs_notice(fs_info, fmt, args...) \
3334 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3335 #define btrfs_info(fs_info, fmt, args...) \
3336 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3339 * Wrappers that use printk_in_rcu
3341 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3342 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3343 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3344 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3345 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3346 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3347 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3348 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3349 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3350 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3351 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3352 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3353 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3354 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3357 * Wrappers that use a ratelimited printk_in_rcu
3359 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3360 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3361 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3362 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3363 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3364 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3365 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3366 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3367 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3368 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3369 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3370 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3371 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3372 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3375 * Wrappers that use a ratelimited printk
3377 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3378 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3379 #define btrfs_alert_rl(fs_info, fmt, args...) \
3380 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3381 #define btrfs_crit_rl(fs_info, fmt, args...) \
3382 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3383 #define btrfs_err_rl(fs_info, fmt, args...) \
3384 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3385 #define btrfs_warn_rl(fs_info, fmt, args...) \
3386 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3387 #define btrfs_notice_rl(fs_info, fmt, args...) \
3388 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3389 #define btrfs_info_rl(fs_info, fmt, args...) \
3390 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3392 #if defined(CONFIG_DYNAMIC_DEBUG)
3393 #define btrfs_debug(fs_info, fmt, args...) \
3395 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3396 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3397 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3399 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3401 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3402 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3403 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3405 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3407 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3408 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3409 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3412 #define btrfs_debug_rl(fs_info, fmt, args...) \
3414 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3415 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3416 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3419 #elif defined(DEBUG)
3420 #define btrfs_debug(fs_info, fmt, args...) \
3421 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3422 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3423 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3424 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3425 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3426 #define btrfs_debug_rl(fs_info, fmt, args...) \
3427 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3429 #define btrfs_debug(fs_info, fmt, args...) \
3430 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3431 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3432 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3433 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3434 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3435 #define btrfs_debug_rl(fs_info, fmt, args...) \
3436 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3439 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3442 btrfs_printk(fs_info, fmt, ##args); \
3443 rcu_read_unlock(); \
3446 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3448 static DEFINE_RATELIMIT_STATE(_rs, \
3449 DEFAULT_RATELIMIT_INTERVAL, \
3450 DEFAULT_RATELIMIT_BURST); \
3451 if (__ratelimit(&_rs)) \
3452 btrfs_printk(fs_info, fmt, ##args); \
3455 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3458 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3459 rcu_read_unlock(); \
3462 #ifdef CONFIG_BTRFS_ASSERT
3465 static inline void assfail(char *expr, char *file, int line)
3467 pr_err("assertion failed: %s, file: %s, line: %d\n",
3472 #define ASSERT(expr) \
3473 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3475 #define ASSERT(expr) ((void)0)
3480 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3481 unsigned int line, int errno, const char *fmt, ...);
3483 const char *btrfs_decode_error(int errno);
3486 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3487 const char *function,
3488 unsigned int line, int errno);
3491 * Call btrfs_abort_transaction as early as possible when an error condition is
3492 * detected, that way the exact line number is reported.
3494 #define btrfs_abort_transaction(trans, errno) \
3496 /* Report first abort since mount */ \
3497 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3498 &((trans)->fs_info->fs_state))) { \
3499 if ((errno) != -EIO) { \
3500 WARN(1, KERN_DEBUG \
3501 "BTRFS: Transaction aborted (error %d)\n", \
3504 btrfs_debug((trans)->fs_info, \
3505 "Transaction aborted (error %d)", \
3509 __btrfs_abort_transaction((trans), __func__, \
3510 __LINE__, (errno)); \
3513 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3515 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3516 (errno), fmt, ##args); \
3521 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3522 unsigned int line, int errno, const char *fmt, ...);
3524 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3525 * will panic(). Otherwise we BUG() here.
3527 #define btrfs_panic(fs_info, errno, fmt, args...) \
3529 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3534 /* compatibility and incompatibility defines */
3536 #define btrfs_set_fs_incompat(__fs_info, opt) \
3537 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3539 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3542 struct btrfs_super_block *disk_super;
3545 disk_super = fs_info->super_copy;
3546 features = btrfs_super_incompat_flags(disk_super);
3547 if (!(features & flag)) {
3548 spin_lock(&fs_info->super_lock);
3549 features = btrfs_super_incompat_flags(disk_super);
3550 if (!(features & flag)) {
3552 btrfs_set_super_incompat_flags(disk_super, features);
3553 btrfs_info(fs_info, "setting %llu feature flag",
3556 spin_unlock(&fs_info->super_lock);
3560 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3561 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3563 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3566 struct btrfs_super_block *disk_super;
3569 disk_super = fs_info->super_copy;
3570 features = btrfs_super_incompat_flags(disk_super);
3571 if (features & flag) {
3572 spin_lock(&fs_info->super_lock);
3573 features = btrfs_super_incompat_flags(disk_super);
3574 if (features & flag) {
3576 btrfs_set_super_incompat_flags(disk_super, features);
3577 btrfs_info(fs_info, "clearing %llu feature flag",
3580 spin_unlock(&fs_info->super_lock);
3584 #define btrfs_fs_incompat(fs_info, opt) \
3585 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3587 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3589 struct btrfs_super_block *disk_super;
3590 disk_super = fs_info->super_copy;
3591 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3594 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3595 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3597 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3600 struct btrfs_super_block *disk_super;
3603 disk_super = fs_info->super_copy;
3604 features = btrfs_super_compat_ro_flags(disk_super);
3605 if (!(features & flag)) {
3606 spin_lock(&fs_info->super_lock);
3607 features = btrfs_super_compat_ro_flags(disk_super);
3608 if (!(features & flag)) {
3610 btrfs_set_super_compat_ro_flags(disk_super, features);
3611 btrfs_info(fs_info, "setting %llu ro feature flag",
3614 spin_unlock(&fs_info->super_lock);
3618 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3619 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3621 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3624 struct btrfs_super_block *disk_super;
3627 disk_super = fs_info->super_copy;
3628 features = btrfs_super_compat_ro_flags(disk_super);
3629 if (features & flag) {
3630 spin_lock(&fs_info->super_lock);
3631 features = btrfs_super_compat_ro_flags(disk_super);
3632 if (features & flag) {
3634 btrfs_set_super_compat_ro_flags(disk_super, features);
3635 btrfs_info(fs_info, "clearing %llu ro feature flag",
3638 spin_unlock(&fs_info->super_lock);
3642 #define btrfs_fs_compat_ro(fs_info, opt) \
3643 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3645 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3647 struct btrfs_super_block *disk_super;
3648 disk_super = fs_info->super_copy;
3649 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3653 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3654 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3655 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3656 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3657 struct inode *inode, struct inode *dir);
3659 #define btrfs_get_acl NULL
3660 #define btrfs_set_acl NULL
3661 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3662 struct inode *inode, struct inode *dir)
3669 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3670 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3671 struct btrfs_root *root);
3672 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3673 struct btrfs_root *root);
3674 int btrfs_recover_relocation(struct btrfs_root *root);
3675 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3676 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3677 struct btrfs_root *root, struct extent_buffer *buf,
3678 struct extent_buffer *cow);
3679 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3680 u64 *bytes_to_reserve);
3681 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3682 struct btrfs_pending_snapshot *pending);
3685 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3686 u64 end, struct btrfs_scrub_progress *progress,
3687 int readonly, int is_dev_replace);
3688 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3689 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3690 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3691 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3692 struct btrfs_device *dev);
3693 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3694 struct btrfs_scrub_progress *progress);
3695 static inline void btrfs_init_full_stripe_locks_tree(
3696 struct btrfs_full_stripe_locks_tree *locks_root)
3698 locks_root->root = RB_ROOT;
3699 mutex_init(&locks_root->lock);
3703 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3704 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3705 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3707 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3709 btrfs_bio_counter_sub(fs_info, 1);
3713 struct reada_control {
3714 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3715 struct btrfs_key key_start;
3716 struct btrfs_key key_end; /* exclusive */
3719 wait_queue_head_t wait;
3721 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3722 struct btrfs_key *start, struct btrfs_key *end);
3723 int btrfs_reada_wait(void *handle);
3724 void btrfs_reada_detach(void *handle);
3725 int btree_readahead_hook(struct extent_buffer *eb, int err);
3727 static inline int is_fstree(u64 rootid)
3729 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3730 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3731 !btrfs_qgroup_level(rootid)))
3736 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3738 return signal_pending(current);
3741 /* Sanity test specific functions */
3742 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3743 void btrfs_test_destroy_inode(struct inode *inode);
3746 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3748 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3749 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3750 &fs_info->fs_state)))