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/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include <linux/btrfs_tree.h>
37 #include <linux/workqueue.h>
38 #include <linux/security.h>
39 #include <linux/sizes.h>
40 #include "extent_io.h"
41 #include "extent_map.h"
42 #include "async-thread.h"
44 struct btrfs_trans_handle
;
45 struct btrfs_transaction
;
46 struct btrfs_pending_snapshot
;
47 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
48 extern struct kmem_cache
*btrfs_transaction_cachep
;
49 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
50 extern struct kmem_cache
*btrfs_path_cachep
;
51 extern struct kmem_cache
*btrfs_free_space_cachep
;
52 struct btrfs_ordered_sum
;
54 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
55 #define STATIC noinline
57 #define STATIC static noinline
60 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
62 #define BTRFS_MAX_MIRRORS 3
64 #define BTRFS_MAX_LEVEL 8
66 #define BTRFS_COMPAT_EXTENT_TREE_V0
69 * the max metadata block size. This limit is somewhat artificial,
70 * but the memmove costs go through the roof for larger blocks.
72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
75 * we can actually store much bigger names, but lets not confuse the rest
78 #define BTRFS_NAME_LEN 255
81 * Theoretical limit is larger, but we keep this down to a sane
82 * value. That should limit greatly the possibility of collisions on
85 #define BTRFS_LINK_MAX 65535U
87 static const int btrfs_csum_sizes
[] = { 4 };
89 /* four bytes for CRC32 */
90 #define BTRFS_EMPTY_DIR_SIZE 0
92 /* specific to btrfs_map_block(), therefore not in include/linux/blk_types.h */
93 #define REQ_GET_READ_MIRRORS (1 << 30)
95 /* ioprio of readahead is set to idle */
96 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
98 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
100 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
102 struct btrfs_mapping_tree
{
103 struct extent_map_tree map_tree
;
106 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
108 BUG_ON(num_stripes
== 0);
109 return sizeof(struct btrfs_chunk
) +
110 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
116 #define BTRFS_FS_STATE_ERROR 0
117 #define BTRFS_FS_STATE_REMOUNTING 1
118 #define BTRFS_FS_STATE_TRANS_ABORTED 2
119 #define BTRFS_FS_STATE_DEV_REPLACING 3
121 #define BTRFS_BACKREF_REV_MAX 256
122 #define BTRFS_BACKREF_REV_SHIFT 56
123 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
124 BTRFS_BACKREF_REV_SHIFT)
126 #define BTRFS_OLD_BACKREF_REV 0
127 #define BTRFS_MIXED_BACKREF_REV 1
130 * every tree block (leaf or node) starts with this header.
132 struct btrfs_header
{
133 /* these first four must match the super block */
134 u8 csum
[BTRFS_CSUM_SIZE
];
135 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
136 __le64 bytenr
; /* which block this node is supposed to live in */
139 /* allowed to be different from the super from here on down */
140 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
145 } __attribute__ ((__packed__
));
147 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
148 sizeof(struct btrfs_header)) / \
149 sizeof(struct btrfs_key_ptr))
150 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
151 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
152 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
153 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
154 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
155 sizeof(struct btrfs_item) - \
156 BTRFS_FILE_EXTENT_INLINE_DATA_START)
157 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
158 sizeof(struct btrfs_item) -\
159 sizeof(struct btrfs_dir_item))
163 * this is a very generous portion of the super block, giving us
164 * room to translate 14 chunks with 3 stripes each.
166 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
169 * just in case we somehow lose the roots and are not able to mount,
170 * we store an array of the roots from previous transactions
173 #define BTRFS_NUM_BACKUP_ROOTS 4
174 struct btrfs_root_backup
{
176 __le64 tree_root_gen
;
179 __le64 chunk_root_gen
;
182 __le64 extent_root_gen
;
191 __le64 csum_root_gen
;
201 u8 extent_root_level
;
205 /* future and to align */
207 } __attribute__ ((__packed__
));
210 * the super block basically lists the main trees of the FS
211 * it currently lacks any block count etc etc
213 struct btrfs_super_block
{
214 u8 csum
[BTRFS_CSUM_SIZE
];
215 /* the first 4 fields must match struct btrfs_header */
216 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
217 __le64 bytenr
; /* this block number */
220 /* allowed to be different from the btrfs_header from here own down */
227 /* this will help find the new super based on the log root */
228 __le64 log_root_transid
;
231 __le64 root_dir_objectid
;
235 __le32 __unused_leafsize
;
237 __le32 sys_chunk_array_size
;
238 __le64 chunk_root_generation
;
240 __le64 compat_ro_flags
;
241 __le64 incompat_flags
;
246 struct btrfs_dev_item dev_item
;
248 char label
[BTRFS_LABEL_SIZE
];
250 __le64 cache_generation
;
251 __le64 uuid_tree_generation
;
253 /* future expansion */
255 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
256 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
257 } __attribute__ ((__packed__
));
260 * Compat flags that we support. If any incompat flags are set other than the
261 * ones specified below then we will fail to mount
263 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
264 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
265 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
267 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
268 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
270 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
271 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
273 #define BTRFS_FEATURE_INCOMPAT_SUPP \
274 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
275 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
276 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
277 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
278 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
279 BTRFS_FEATURE_INCOMPAT_RAID56 | \
280 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
281 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
282 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
284 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
285 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
286 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
289 * A leaf is full of items. offset and size tell us where to find
290 * the item in the leaf (relative to the start of the data area)
293 struct btrfs_disk_key key
;
296 } __attribute__ ((__packed__
));
299 * leaves have an item area and a data area:
300 * [item0, item1....itemN] [free space] [dataN...data1, data0]
302 * The data is separate from the items to get the keys closer together
306 struct btrfs_header header
;
307 struct btrfs_item items
[];
308 } __attribute__ ((__packed__
));
311 * all non-leaf blocks are nodes, they hold only keys and pointers to
314 struct btrfs_key_ptr
{
315 struct btrfs_disk_key key
;
318 } __attribute__ ((__packed__
));
321 struct btrfs_header header
;
322 struct btrfs_key_ptr ptrs
[];
323 } __attribute__ ((__packed__
));
326 * btrfs_paths remember the path taken from the root down to the leaf.
327 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
328 * to any other levels that are present.
330 * The slots array records the index of the item or block pointer
331 * used while walking the tree.
333 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
335 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
336 int slots
[BTRFS_MAX_LEVEL
];
337 /* if there is real range locking, this locks field will change */
338 u8 locks
[BTRFS_MAX_LEVEL
];
340 /* keep some upper locks as we walk down */
344 * set by btrfs_split_item, tells search_slot to keep all locks
345 * and to force calls to keep space in the nodes
347 unsigned int search_for_split
:1;
348 unsigned int keep_locks
:1;
349 unsigned int skip_locking
:1;
350 unsigned int leave_spinning
:1;
351 unsigned int search_commit_root
:1;
352 unsigned int need_commit_sem
:1;
353 unsigned int skip_release_on_error
:1;
355 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
356 sizeof(struct btrfs_item))
357 struct btrfs_dev_replace
{
358 u64 replace_state
; /* see #define above */
359 u64 time_started
; /* seconds since 1-Jan-1970 */
360 u64 time_stopped
; /* seconds since 1-Jan-1970 */
361 atomic64_t num_write_errors
;
362 atomic64_t num_uncorrectable_read_errors
;
365 u64 committed_cursor_left
;
366 u64 cursor_left_last_write_of_item
;
369 u64 cont_reading_from_srcdev_mode
; /* see #define above */
372 int item_needs_writeback
;
373 struct btrfs_device
*srcdev
;
374 struct btrfs_device
*tgtdev
;
377 atomic_t nesting_level
;
378 struct mutex lock_finishing_cancel_unmount
;
381 atomic_t blocking_readers
;
382 wait_queue_head_t read_lock_wq
;
384 struct btrfs_scrub_progress scrub_progress
;
387 /* For raid type sysfs entries */
388 struct raid_kobject
{
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
;
443 struct rw_semaphore groups_sem
;
444 /* for block groups in our same type */
445 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
446 wait_queue_head_t wait
;
449 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
452 #define BTRFS_BLOCK_RSV_GLOBAL 1
453 #define BTRFS_BLOCK_RSV_DELALLOC 2
454 #define BTRFS_BLOCK_RSV_TRANS 3
455 #define BTRFS_BLOCK_RSV_CHUNK 4
456 #define BTRFS_BLOCK_RSV_DELOPS 5
457 #define BTRFS_BLOCK_RSV_EMPTY 6
458 #define BTRFS_BLOCK_RSV_TEMP 7
460 struct btrfs_block_rsv
{
463 struct btrfs_space_info
*space_info
;
467 unsigned short failfast
;
471 * free clusters are used to claim free space in relatively large chunks,
472 * allowing us to do less seeky writes. They are used for all metadata
473 * allocations and data allocations in ssd mode.
475 struct btrfs_free_cluster
{
477 spinlock_t refill_lock
;
480 /* largest extent in this cluster */
483 /* first extent starting offset */
486 /* We did a full search and couldn't create a cluster */
489 struct btrfs_block_group_cache
*block_group
;
491 * when a cluster is allocated from a block group, we put the
492 * cluster onto a list in the block group so that it can
493 * be freed before the block group is freed.
495 struct list_head block_group_list
;
498 enum btrfs_caching_type
{
500 BTRFS_CACHE_STARTED
= 1,
501 BTRFS_CACHE_FAST
= 2,
502 BTRFS_CACHE_FINISHED
= 3,
503 BTRFS_CACHE_ERROR
= 4,
506 enum btrfs_disk_cache_state
{
507 BTRFS_DC_WRITTEN
= 0,
513 struct btrfs_caching_control
{
514 struct list_head list
;
516 wait_queue_head_t wait
;
517 struct btrfs_work work
;
518 struct btrfs_block_group_cache
*block_group
;
523 /* Once caching_thread() finds this much free space, it will wake up waiters. */
524 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
526 struct btrfs_io_ctl
{
530 struct btrfs_root
*root
;
537 unsigned check_crcs
:1;
540 struct btrfs_block_group_cache
{
541 struct btrfs_key key
;
542 struct btrfs_block_group_item item
;
543 struct btrfs_fs_info
*fs_info
;
551 u64 cache_generation
;
555 * If the free space extent count exceeds this number, convert the block
558 u32 bitmap_high_thresh
;
561 * If the free space extent count drops below this number, convert the
562 * block group back to extents.
564 u32 bitmap_low_thresh
;
567 * It is just used for the delayed data space allocation because
568 * only the data space allocation and the relative metadata update
569 * can be done cross the transaction.
571 struct rw_semaphore data_rwsem
;
573 /* for raid56, this is a full stripe, without parity */
574 unsigned long full_stripe_len
;
578 unsigned int has_caching_ctl
:1;
579 unsigned int removed
:1;
581 int disk_cache_state
;
583 /* cache tracking stuff */
585 struct btrfs_caching_control
*caching_ctl
;
586 u64 last_byte_to_unpin
;
588 struct btrfs_space_info
*space_info
;
590 /* free space cache stuff */
591 struct btrfs_free_space_ctl
*free_space_ctl
;
593 /* block group cache stuff */
594 struct rb_node cache_node
;
596 /* for block groups in the same raid type */
597 struct list_head list
;
602 /* List of struct btrfs_free_clusters for this block group.
603 * Today it will only have one thing on it, but that may change
605 struct list_head cluster_list
;
607 /* For delayed block group creation or deletion of empty block groups */
608 struct list_head bg_list
;
610 /* For read-only block groups */
611 struct list_head ro_list
;
615 /* For dirty block groups */
616 struct list_head dirty_list
;
617 struct list_head io_list
;
619 struct btrfs_io_ctl io_ctl
;
622 * Incremented when doing extent allocations and holding a read lock
623 * on the space_info's groups_sem semaphore.
624 * Decremented when an ordered extent that represents an IO against this
625 * block group's range is created (after it's added to its inode's
626 * root's list of ordered extents) or immediately after the allocation
627 * if it's a metadata extent or fallocate extent (for these cases we
628 * don't create ordered extents).
630 atomic_t reservations
;
633 * Incremented while holding the spinlock *lock* by a task checking if
634 * it can perform a nocow write (incremented if the value for the *ro*
635 * field is 0). Decremented by such tasks once they create an ordered
636 * extent or before that if some error happens before reaching that step.
637 * This is to prevent races between block group relocation and nocow
638 * writes through direct IO.
640 atomic_t nocow_writers
;
642 /* Lock for free space tree operations. */
643 struct mutex free_space_lock
;
646 * Does the block group need to be added to the free space tree?
647 * Protected by free_space_lock.
649 int needs_free_space
;
652 /* delayed seq elem */
654 struct list_head list
;
658 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
660 enum btrfs_orphan_cleanup_state
{
661 ORPHAN_CLEANUP_STARTED
= 1,
662 ORPHAN_CLEANUP_DONE
= 2,
665 /* used by the raid56 code to lock stripes for read/modify/write */
666 struct btrfs_stripe_hash
{
667 struct list_head hash_list
;
668 wait_queue_head_t wait
;
672 /* used by the raid56 code to lock stripes for read/modify/write */
673 struct btrfs_stripe_hash_table
{
674 struct list_head stripe_cache
;
675 spinlock_t cache_lock
;
677 struct btrfs_stripe_hash table
[];
680 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
682 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
685 struct reloc_control
;
687 struct btrfs_fs_devices
;
688 struct btrfs_balance_control
;
689 struct btrfs_delayed_root
;
690 struct btrfs_fs_info
{
691 u8 fsid
[BTRFS_FSID_SIZE
];
692 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
693 struct btrfs_root
*extent_root
;
694 struct btrfs_root
*tree_root
;
695 struct btrfs_root
*chunk_root
;
696 struct btrfs_root
*dev_root
;
697 struct btrfs_root
*fs_root
;
698 struct btrfs_root
*csum_root
;
699 struct btrfs_root
*quota_root
;
700 struct btrfs_root
*uuid_root
;
701 struct btrfs_root
*free_space_root
;
703 /* the log root tree is a directory of all the other log roots */
704 struct btrfs_root
*log_root_tree
;
706 spinlock_t fs_roots_radix_lock
;
707 struct radix_tree_root fs_roots_radix
;
709 /* block group cache stuff */
710 spinlock_t block_group_cache_lock
;
711 u64 first_logical_byte
;
712 struct rb_root block_group_cache_tree
;
714 /* keep track of unallocated space */
715 spinlock_t free_chunk_lock
;
716 u64 free_chunk_space
;
718 struct extent_io_tree freed_extents
[2];
719 struct extent_io_tree
*pinned_extents
;
721 /* logical->physical extent mapping */
722 struct btrfs_mapping_tree mapping_tree
;
725 * block reservation for extent, checksum, root tree and
726 * delayed dir index item
728 struct btrfs_block_rsv global_block_rsv
;
729 /* block reservation for delay allocation */
730 struct btrfs_block_rsv delalloc_block_rsv
;
731 /* block reservation for metadata operations */
732 struct btrfs_block_rsv trans_block_rsv
;
733 /* block reservation for chunk tree */
734 struct btrfs_block_rsv chunk_block_rsv
;
735 /* block reservation for delayed operations */
736 struct btrfs_block_rsv delayed_block_rsv
;
738 struct btrfs_block_rsv empty_block_rsv
;
741 u64 last_trans_committed
;
742 u64 avg_delayed_ref_runtime
;
745 * this is updated to the current trans every time a full commit
746 * is required instead of the faster short fsync log commits
748 u64 last_trans_log_full_commit
;
749 unsigned long mount_opt
;
751 * Track requests for actions that need to be done during transaction
752 * commit (like for some mount options).
754 unsigned long pending_changes
;
755 unsigned long compress_type
:4;
758 * It is a suggestive number, the read side is safe even it gets a
759 * wrong number because we will write out the data into a regular
760 * extent. The write side(mount/remount) is under ->s_umount lock,
761 * so it is also safe.
765 * Protected by ->chunk_mutex and sb->s_umount.
767 * The reason that we use two lock to protect it is because only
768 * remount and mount operations can change it and these two operations
769 * are under sb->s_umount, but the read side (chunk allocation) can not
770 * acquire sb->s_umount or the deadlock would happen. So we use two
771 * locks to protect it. On the write side, we must acquire two locks,
772 * and on the read side, we just need acquire one of them.
775 struct btrfs_transaction
*running_transaction
;
776 wait_queue_head_t transaction_throttle
;
777 wait_queue_head_t transaction_wait
;
778 wait_queue_head_t transaction_blocked_wait
;
779 wait_queue_head_t async_submit_wait
;
782 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
783 * when they are updated.
785 * Because we do not clear the flags for ever, so we needn't use
786 * the lock on the read side.
788 * We also needn't use the lock when we mount the fs, because
789 * there is no other task which will update the flag.
791 spinlock_t super_lock
;
792 struct btrfs_super_block
*super_copy
;
793 struct btrfs_super_block
*super_for_commit
;
794 struct block_device
*__bdev
;
795 struct super_block
*sb
;
796 struct inode
*btree_inode
;
797 struct backing_dev_info bdi
;
798 struct mutex tree_log_mutex
;
799 struct mutex transaction_kthread_mutex
;
800 struct mutex cleaner_mutex
;
801 struct mutex chunk_mutex
;
802 struct mutex volume_mutex
;
805 * this is taken to make sure we don't set block groups ro after
806 * the free space cache has been allocated on them
808 struct mutex ro_block_group_mutex
;
810 /* this is used during read/modify/write to make sure
811 * no two ios are trying to mod the same stripe at the same
814 struct btrfs_stripe_hash_table
*stripe_hash_table
;
817 * this protects the ordered operations list only while we are
818 * processing all of the entries on it. This way we make
819 * sure the commit code doesn't find the list temporarily empty
820 * because another function happens to be doing non-waiting preflush
821 * before jumping into the main commit.
823 struct mutex ordered_operations_mutex
;
825 struct rw_semaphore commit_root_sem
;
827 struct rw_semaphore cleanup_work_sem
;
829 struct rw_semaphore subvol_sem
;
830 struct srcu_struct subvol_srcu
;
832 spinlock_t trans_lock
;
834 * the reloc mutex goes with the trans lock, it is taken
835 * during commit to protect us from the relocation code
837 struct mutex reloc_mutex
;
839 struct list_head trans_list
;
840 struct list_head dead_roots
;
841 struct list_head caching_block_groups
;
843 spinlock_t delayed_iput_lock
;
844 struct list_head delayed_iputs
;
845 struct mutex cleaner_delayed_iput_mutex
;
847 /* this protects tree_mod_seq_list */
848 spinlock_t tree_mod_seq_lock
;
849 atomic64_t tree_mod_seq
;
850 struct list_head tree_mod_seq_list
;
852 /* this protects tree_mod_log */
853 rwlock_t tree_mod_log_lock
;
854 struct rb_root tree_mod_log
;
856 atomic_t nr_async_submits
;
857 atomic_t async_submit_draining
;
858 atomic_t nr_async_bios
;
859 atomic_t async_delalloc_pages
;
860 atomic_t open_ioctl_trans
;
863 * this is used to protect the following list -- ordered_roots.
865 spinlock_t ordered_root_lock
;
868 * all fs/file tree roots in which there are data=ordered extents
869 * pending writeback are added into this list.
871 * these can span multiple transactions and basically include
872 * every dirty data page that isn't from nodatacow
874 struct list_head ordered_roots
;
876 struct mutex delalloc_root_mutex
;
877 spinlock_t delalloc_root_lock
;
878 /* all fs/file tree roots that have delalloc inodes. */
879 struct list_head delalloc_roots
;
882 * there is a pool of worker threads for checksumming during writes
883 * and a pool for checksumming after reads. This is because readers
884 * can run with FS locks held, and the writers may be waiting for
885 * those locks. We don't want ordering in the pending list to cause
886 * deadlocks, and so the two are serviced separately.
888 * A third pool does submit_bio to avoid deadlocking with the other
891 struct btrfs_workqueue
*workers
;
892 struct btrfs_workqueue
*delalloc_workers
;
893 struct btrfs_workqueue
*flush_workers
;
894 struct btrfs_workqueue
*endio_workers
;
895 struct btrfs_workqueue
*endio_meta_workers
;
896 struct btrfs_workqueue
*endio_raid56_workers
;
897 struct btrfs_workqueue
*endio_repair_workers
;
898 struct btrfs_workqueue
*rmw_workers
;
899 struct btrfs_workqueue
*endio_meta_write_workers
;
900 struct btrfs_workqueue
*endio_write_workers
;
901 struct btrfs_workqueue
*endio_freespace_worker
;
902 struct btrfs_workqueue
*submit_workers
;
903 struct btrfs_workqueue
*caching_workers
;
904 struct btrfs_workqueue
*readahead_workers
;
907 * fixup workers take dirty pages that didn't properly go through
908 * the cow mechanism and make them safe to write. It happens
909 * for the sys_munmap function call path
911 struct btrfs_workqueue
*fixup_workers
;
912 struct btrfs_workqueue
*delayed_workers
;
914 /* the extent workers do delayed refs on the extent allocation tree */
915 struct btrfs_workqueue
*extent_workers
;
916 struct task_struct
*transaction_kthread
;
917 struct task_struct
*cleaner_kthread
;
918 int thread_pool_size
;
920 struct kobject
*space_info_kobj
;
923 int log_root_recovering
;
928 /* used to keep from writing metadata until there is a nice batch */
929 struct percpu_counter dirty_metadata_bytes
;
930 struct percpu_counter delalloc_bytes
;
931 s32 dirty_metadata_batch
;
934 struct list_head dirty_cowonly_roots
;
936 struct btrfs_fs_devices
*fs_devices
;
939 * the space_info list is almost entirely read only. It only changes
940 * when we add a new raid type to the FS, and that happens
941 * very rarely. RCU is used to protect it.
943 struct list_head space_info
;
945 struct btrfs_space_info
*data_sinfo
;
947 struct reloc_control
*reloc_ctl
;
949 /* data_alloc_cluster is only used in ssd mode */
950 struct btrfs_free_cluster data_alloc_cluster
;
952 /* all metadata allocations go through this cluster */
953 struct btrfs_free_cluster meta_alloc_cluster
;
955 /* auto defrag inodes go here */
956 spinlock_t defrag_inodes_lock
;
957 struct rb_root defrag_inodes
;
958 atomic_t defrag_running
;
960 /* Used to protect avail_{data, metadata, system}_alloc_bits */
961 seqlock_t profiles_lock
;
963 * these three are in extended format (availability of single
964 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
965 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
967 u64 avail_data_alloc_bits
;
968 u64 avail_metadata_alloc_bits
;
969 u64 avail_system_alloc_bits
;
971 /* restriper state */
972 spinlock_t balance_lock
;
973 struct mutex balance_mutex
;
974 atomic_t balance_running
;
975 atomic_t balance_pause_req
;
976 atomic_t balance_cancel_req
;
977 struct btrfs_balance_control
*balance_ctl
;
978 wait_queue_head_t balance_wait_q
;
980 unsigned data_chunk_allocations
;
981 unsigned metadata_ratio
;
985 /* private scrub information */
986 struct mutex scrub_lock
;
987 atomic_t scrubs_running
;
988 atomic_t scrub_pause_req
;
989 atomic_t scrubs_paused
;
990 atomic_t scrub_cancel_req
;
991 wait_queue_head_t scrub_pause_wait
;
992 int scrub_workers_refcnt
;
993 struct btrfs_workqueue
*scrub_workers
;
994 struct btrfs_workqueue
*scrub_wr_completion_workers
;
995 struct btrfs_workqueue
*scrub_nocow_workers
;
996 struct btrfs_workqueue
*scrub_parity_workers
;
998 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
999 u32 check_integrity_print_mask
;
1004 unsigned int quota_enabled
:1;
1007 * quota_enabled only changes state after a commit. This holds the
1010 unsigned int pending_quota_state
:1;
1012 /* is qgroup tracking in a consistent state? */
1015 /* holds configuration and tracking. Protected by qgroup_lock */
1016 struct rb_root qgroup_tree
;
1017 struct rb_root qgroup_op_tree
;
1018 spinlock_t qgroup_lock
;
1019 spinlock_t qgroup_op_lock
;
1020 atomic_t qgroup_op_seq
;
1023 * used to avoid frequently calling ulist_alloc()/ulist_free()
1024 * when doing qgroup accounting, it must be protected by qgroup_lock.
1026 struct ulist
*qgroup_ulist
;
1028 /* protect user change for quota operations */
1029 struct mutex qgroup_ioctl_lock
;
1031 /* list of dirty qgroups to be written at next commit */
1032 struct list_head dirty_qgroups
;
1034 /* used by qgroup for an efficient tree traversal */
1037 /* qgroup rescan items */
1038 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1039 struct btrfs_key qgroup_rescan_progress
;
1040 struct btrfs_workqueue
*qgroup_rescan_workers
;
1041 struct completion qgroup_rescan_completion
;
1042 struct btrfs_work qgroup_rescan_work
;
1044 /* filesystem state */
1045 unsigned long fs_state
;
1047 struct btrfs_delayed_root
*delayed_root
;
1049 /* readahead tree */
1050 spinlock_t reada_lock
;
1051 struct radix_tree_root reada_tree
;
1053 /* readahead works cnt */
1054 atomic_t reada_works_cnt
;
1056 /* Extent buffer radix tree */
1057 spinlock_t buffer_lock
;
1058 struct radix_tree_root buffer_radix
;
1060 /* next backup root to be overwritten */
1061 int backup_root_index
;
1063 int num_tolerated_disk_barrier_failures
;
1065 /* device replace state */
1066 struct btrfs_dev_replace dev_replace
;
1068 atomic_t mutually_exclusive_operation_running
;
1070 struct percpu_counter bio_counter
;
1071 wait_queue_head_t replace_wait
;
1073 struct semaphore uuid_tree_rescan_sem
;
1074 unsigned int update_uuid_tree_gen
:1;
1076 /* Used to reclaim the metadata space in the background. */
1077 struct work_struct async_reclaim_work
;
1079 spinlock_t unused_bgs_lock
;
1080 struct list_head unused_bgs
;
1081 struct mutex unused_bg_unpin_mutex
;
1082 struct mutex delete_unused_bgs_mutex
;
1084 /* For btrfs to record security options */
1085 struct security_mnt_opts security_opts
;
1088 * Chunks that can't be freed yet (under a trim/discard operation)
1089 * and will be latter freed. Protected by fs_info->chunk_mutex.
1091 struct list_head pinned_chunks
;
1093 int creating_free_space_tree
;
1096 struct btrfs_subvolume_writers
{
1097 struct percpu_counter counter
;
1098 wait_queue_head_t wait
;
1102 * The state of btrfs root
1105 * btrfs_record_root_in_trans is a multi-step process,
1106 * and it can race with the balancing code. But the
1107 * race is very small, and only the first time the root
1108 * is added to each transaction. So IN_TRANS_SETUP
1109 * is used to tell us when more checks are required
1111 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1112 #define BTRFS_ROOT_REF_COWS 1
1113 #define BTRFS_ROOT_TRACK_DIRTY 2
1114 #define BTRFS_ROOT_IN_RADIX 3
1115 #define BTRFS_ROOT_DUMMY_ROOT 4
1116 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1117 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1118 #define BTRFS_ROOT_FORCE_COW 7
1119 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1120 #define BTRFS_ROOT_DIRTY 9
1123 * in ram representation of the tree. extent_root is used for all allocations
1124 * and for the extent tree extent_root root.
1127 struct extent_buffer
*node
;
1129 struct extent_buffer
*commit_root
;
1130 struct btrfs_root
*log_root
;
1131 struct btrfs_root
*reloc_root
;
1133 unsigned long state
;
1134 struct btrfs_root_item root_item
;
1135 struct btrfs_key root_key
;
1136 struct btrfs_fs_info
*fs_info
;
1137 struct extent_io_tree dirty_log_pages
;
1139 struct mutex objectid_mutex
;
1141 spinlock_t accounting_lock
;
1142 struct btrfs_block_rsv
*block_rsv
;
1144 /* free ino cache stuff */
1145 struct btrfs_free_space_ctl
*free_ino_ctl
;
1146 enum btrfs_caching_type ino_cache_state
;
1147 spinlock_t ino_cache_lock
;
1148 wait_queue_head_t ino_cache_wait
;
1149 struct btrfs_free_space_ctl
*free_ino_pinned
;
1150 u64 ino_cache_progress
;
1151 struct inode
*ino_cache_inode
;
1153 struct mutex log_mutex
;
1154 wait_queue_head_t log_writer_wait
;
1155 wait_queue_head_t log_commit_wait
[2];
1156 struct list_head log_ctxs
[2];
1157 atomic_t log_writers
;
1158 atomic_t log_commit
[2];
1161 /* No matter the commit succeeds or not*/
1162 int log_transid_committed
;
1163 /* Just be updated when the commit succeeds. */
1164 int last_log_commit
;
1165 pid_t log_start_pid
;
1170 /* data allocations are done in sectorsize units */
1173 /* node allocations are done in nodesize units */
1180 u64 highest_objectid
;
1182 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1185 u64 defrag_trans_start
;
1186 struct btrfs_key defrag_progress
;
1187 struct btrfs_key defrag_max
;
1190 /* the dirty list is only used by non-reference counted roots */
1191 struct list_head dirty_list
;
1193 struct list_head root_list
;
1195 spinlock_t log_extents_lock
[2];
1196 struct list_head logged_list
[2];
1198 spinlock_t orphan_lock
;
1199 atomic_t orphan_inodes
;
1200 struct btrfs_block_rsv
*orphan_block_rsv
;
1201 int orphan_cleanup_state
;
1203 spinlock_t inode_lock
;
1204 /* red-black tree that keeps track of in-memory inodes */
1205 struct rb_root inode_tree
;
1208 * radix tree that keeps track of delayed nodes of every inode,
1209 * protected by inode_lock
1211 struct radix_tree_root delayed_nodes_tree
;
1213 * right now this just gets used so that a root has its own devid
1214 * for stat. It may be used for more later
1218 spinlock_t root_item_lock
;
1221 struct mutex delalloc_mutex
;
1222 spinlock_t delalloc_lock
;
1224 * all of the inodes that have delalloc bytes. It is possible for
1225 * this list to be empty even when there is still dirty data=ordered
1226 * extents waiting to finish IO.
1228 struct list_head delalloc_inodes
;
1229 struct list_head delalloc_root
;
1230 u64 nr_delalloc_inodes
;
1232 struct mutex ordered_extent_mutex
;
1234 * this is used by the balancing code to wait for all the pending
1237 spinlock_t ordered_extent_lock
;
1240 * all of the data=ordered extents pending writeback
1241 * these can span multiple transactions and basically include
1242 * every dirty data page that isn't from nodatacow
1244 struct list_head ordered_extents
;
1245 struct list_head ordered_root
;
1246 u64 nr_ordered_extents
;
1249 * Number of currently running SEND ioctls to prevent
1250 * manipulation with the read-only status via SUBVOL_SETFLAGS
1252 int send_in_progress
;
1253 struct btrfs_subvolume_writers
*subv_writers
;
1254 atomic_t will_be_snapshoted
;
1256 /* For qgroup metadata space reserve */
1257 atomic_t qgroup_meta_rsv
;
1261 * Flags for mount options.
1263 * Note: don't forget to add new options to btrfs_show_options()
1265 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1266 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1267 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1268 #define BTRFS_MOUNT_SSD (1 << 3)
1269 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1270 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1271 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1272 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1273 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1274 #define BTRFS_MOUNT_NOSSD (1 << 9)
1275 #define BTRFS_MOUNT_DISCARD (1 << 10)
1276 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1277 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1278 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1279 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1280 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1281 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1282 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1283 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1284 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1285 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1286 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1287 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1288 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1289 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1290 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1291 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1292 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1294 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1295 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1297 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1298 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1299 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1300 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1303 #define btrfs_set_and_info(root, opt, fmt, args...) \
1305 if (!btrfs_test_opt(root, opt)) \
1306 btrfs_info(root->fs_info, fmt, ##args); \
1307 btrfs_set_opt(root->fs_info->mount_opt, opt); \
1310 #define btrfs_clear_and_info(root, opt, fmt, args...) \
1312 if (btrfs_test_opt(root, opt)) \
1313 btrfs_info(root->fs_info, fmt, ##args); \
1314 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
1317 #ifdef CONFIG_BTRFS_DEBUG
1319 btrfs_should_fragment_free_space(struct btrfs_root
*root
,
1320 struct btrfs_block_group_cache
*block_group
)
1322 return (btrfs_test_opt(root
, FRAGMENT_METADATA
) &&
1323 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1324 (btrfs_test_opt(root
, FRAGMENT_DATA
) &&
1325 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1330 * Requests for changes that need to be done during transaction commit.
1332 * Internal mount options that are used for special handling of the real
1333 * mount options (eg. cannot be set during remount and have to be set during
1334 * transaction commit)
1337 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1338 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1339 #define BTRFS_PENDING_COMMIT (2)
1341 #define btrfs_test_pending(info, opt) \
1342 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1343 #define btrfs_set_pending(info, opt) \
1344 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1345 #define btrfs_clear_pending(info, opt) \
1346 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1349 * Helpers for setting pending mount option changes.
1351 * Expects corresponding macros
1352 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1354 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1356 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1357 btrfs_info((info), fmt, ##args); \
1358 btrfs_set_pending((info), SET_##opt); \
1359 btrfs_clear_pending((info), CLEAR_##opt); \
1363 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1365 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1366 btrfs_info((info), fmt, ##args); \
1367 btrfs_set_pending((info), CLEAR_##opt); \
1368 btrfs_clear_pending((info), SET_##opt); \
1375 #define BTRFS_INODE_NODATASUM (1 << 0)
1376 #define BTRFS_INODE_NODATACOW (1 << 1)
1377 #define BTRFS_INODE_READONLY (1 << 2)
1378 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1379 #define BTRFS_INODE_PREALLOC (1 << 4)
1380 #define BTRFS_INODE_SYNC (1 << 5)
1381 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1382 #define BTRFS_INODE_APPEND (1 << 7)
1383 #define BTRFS_INODE_NODUMP (1 << 8)
1384 #define BTRFS_INODE_NOATIME (1 << 9)
1385 #define BTRFS_INODE_DIRSYNC (1 << 10)
1386 #define BTRFS_INODE_COMPRESS (1 << 11)
1388 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1390 struct btrfs_map_token
{
1391 struct extent_buffer
*eb
;
1393 unsigned long offset
;
1396 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1397 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1399 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1401 token
->kaddr
= NULL
;
1404 /* some macros to generate set/get functions for the struct fields. This
1405 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1408 #define le8_to_cpu(v) (v)
1409 #define cpu_to_le8(v) (v)
1412 #define read_eb_member(eb, ptr, type, member, result) ( \
1413 read_extent_buffer(eb, (char *)(result), \
1414 ((unsigned long)(ptr)) + \
1415 offsetof(type, member), \
1416 sizeof(((type *)0)->member)))
1418 #define write_eb_member(eb, ptr, type, member, result) ( \
1419 write_extent_buffer(eb, (char *)(result), \
1420 ((unsigned long)(ptr)) + \
1421 offsetof(type, member), \
1422 sizeof(((type *)0)->member)))
1424 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1425 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1426 unsigned long off, \
1427 struct btrfs_map_token *token); \
1428 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1429 unsigned long off, u##bits val, \
1430 struct btrfs_map_token *token); \
1431 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1432 unsigned long off) \
1434 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1436 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1437 unsigned long off, u##bits val) \
1439 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1442 DECLARE_BTRFS_SETGET_BITS(8)
1443 DECLARE_BTRFS_SETGET_BITS(16)
1444 DECLARE_BTRFS_SETGET_BITS(32)
1445 DECLARE_BTRFS_SETGET_BITS(64)
1447 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1448 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1450 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1451 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1453 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1456 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1457 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1459 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1460 struct btrfs_map_token *token) \
1462 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1463 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1465 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1466 type *s, u##bits val, \
1467 struct btrfs_map_token *token) \
1469 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1470 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1473 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1474 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1476 type *p = page_address(eb->pages[0]); \
1477 u##bits res = le##bits##_to_cpu(p->member); \
1480 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1483 type *p = page_address(eb->pages[0]); \
1484 p->member = cpu_to_le##bits(val); \
1487 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1488 static inline u##bits btrfs_##name(type *s) \
1490 return le##bits##_to_cpu(s->member); \
1492 static inline void btrfs_set_##name(type *s, u##bits val) \
1494 s->member = cpu_to_le##bits(val); \
1497 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1498 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1499 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1500 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1501 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1502 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1504 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1505 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1506 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1507 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1508 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1509 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1511 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1512 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1514 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1516 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1518 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1520 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1522 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1523 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1525 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1527 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1529 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1532 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1534 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1537 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1539 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1542 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1543 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1544 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1545 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1546 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1547 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1548 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1549 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1550 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1551 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1552 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1554 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1556 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1559 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1560 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1561 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1563 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1565 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1567 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1569 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1570 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1572 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1574 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1575 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1577 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1580 unsigned long offset
= (unsigned long)c
;
1581 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1582 offset
+= nr
* sizeof(struct btrfs_stripe
);
1583 return (struct btrfs_stripe
*)offset
;
1586 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1588 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1591 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1592 struct btrfs_chunk
*c
, int nr
)
1594 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1597 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1598 struct btrfs_chunk
*c
, int nr
)
1600 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1603 /* struct btrfs_block_group_item */
1604 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1606 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1608 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1609 struct btrfs_block_group_item
, chunk_objectid
, 64);
1611 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1612 struct btrfs_block_group_item
, chunk_objectid
, 64);
1613 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1614 struct btrfs_block_group_item
, flags
, 64);
1615 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1616 struct btrfs_block_group_item
, flags
, 64);
1618 /* struct btrfs_free_space_info */
1619 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1621 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1623 /* struct btrfs_inode_ref */
1624 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1625 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1627 /* struct btrfs_inode_extref */
1628 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1629 parent_objectid
, 64);
1630 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1632 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1634 /* struct btrfs_inode_item */
1635 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1636 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1637 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1638 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1639 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1640 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1641 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1642 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1643 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1644 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1645 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1646 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1647 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1649 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1651 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1653 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1654 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1656 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1658 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1659 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1660 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1661 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1662 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1663 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1664 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1665 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1666 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1667 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1669 /* struct btrfs_dev_extent */
1670 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1672 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1673 chunk_objectid
, 64);
1674 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1676 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1678 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1680 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1681 return (unsigned long)dev
+ ptr
;
1684 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1685 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1687 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1689 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1692 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1694 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1695 struct btrfs_tree_block_info
*item
,
1696 struct btrfs_disk_key
*key
)
1698 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1701 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1702 struct btrfs_tree_block_info
*item
,
1703 struct btrfs_disk_key
*key
)
1705 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1708 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1710 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1712 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1714 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1717 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1720 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1722 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1725 static inline u32
btrfs_extent_inline_ref_size(int type
)
1727 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1728 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1729 return sizeof(struct btrfs_extent_inline_ref
);
1730 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1731 return sizeof(struct btrfs_shared_data_ref
) +
1732 sizeof(struct btrfs_extent_inline_ref
);
1733 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1734 return sizeof(struct btrfs_extent_data_ref
) +
1735 offsetof(struct btrfs_extent_inline_ref
, offset
);
1740 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1741 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1743 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1744 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1746 /* struct btrfs_node */
1747 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1748 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1749 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1751 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1754 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1757 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1758 sizeof(struct btrfs_key_ptr
) * nr
;
1759 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1762 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1766 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1767 sizeof(struct btrfs_key_ptr
) * nr
;
1768 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1771 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1774 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1775 sizeof(struct btrfs_key_ptr
) * nr
;
1776 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1779 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1783 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1784 sizeof(struct btrfs_key_ptr
) * nr
;
1785 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1788 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1790 return offsetof(struct btrfs_node
, ptrs
) +
1791 sizeof(struct btrfs_key_ptr
) * nr
;
1794 void btrfs_node_key(struct extent_buffer
*eb
,
1795 struct btrfs_disk_key
*disk_key
, int nr
);
1797 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1798 struct btrfs_disk_key
*disk_key
, int nr
)
1801 ptr
= btrfs_node_key_ptr_offset(nr
);
1802 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1803 struct btrfs_key_ptr
, key
, disk_key
);
1806 /* struct btrfs_item */
1807 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1808 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1809 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1810 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1812 static inline unsigned long btrfs_item_nr_offset(int nr
)
1814 return offsetof(struct btrfs_leaf
, items
) +
1815 sizeof(struct btrfs_item
) * nr
;
1818 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1820 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1823 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1824 struct btrfs_item
*item
)
1826 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1829 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1831 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1834 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1836 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1839 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1841 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1844 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1845 struct btrfs_disk_key
*disk_key
, int nr
)
1847 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1848 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1851 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1852 struct btrfs_disk_key
*disk_key
, int nr
)
1854 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1855 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1858 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1861 * struct btrfs_root_ref
1863 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1864 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1865 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1867 /* struct btrfs_dir_item */
1868 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1869 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1870 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1871 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1872 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1873 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1875 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1877 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1880 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1881 struct btrfs_dir_item
*item
,
1882 struct btrfs_disk_key
*key
)
1884 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1887 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1888 struct btrfs_dir_item
*item
,
1889 struct btrfs_disk_key
*key
)
1891 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1894 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1896 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1898 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1901 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1902 struct btrfs_free_space_header
*h
,
1903 struct btrfs_disk_key
*key
)
1905 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1908 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1909 struct btrfs_free_space_header
*h
,
1910 struct btrfs_disk_key
*key
)
1912 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1915 /* struct btrfs_disk_key */
1916 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1918 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1919 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1921 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1922 struct btrfs_disk_key
*disk
)
1924 cpu
->offset
= le64_to_cpu(disk
->offset
);
1925 cpu
->type
= disk
->type
;
1926 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1929 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1930 struct btrfs_key
*cpu
)
1932 disk
->offset
= cpu_to_le64(cpu
->offset
);
1933 disk
->type
= cpu
->type
;
1934 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1937 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1938 struct btrfs_key
*key
, int nr
)
1940 struct btrfs_disk_key disk_key
;
1941 btrfs_node_key(eb
, &disk_key
, nr
);
1942 btrfs_disk_key_to_cpu(key
, &disk_key
);
1945 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1946 struct btrfs_key
*key
, int nr
)
1948 struct btrfs_disk_key disk_key
;
1949 btrfs_item_key(eb
, &disk_key
, nr
);
1950 btrfs_disk_key_to_cpu(key
, &disk_key
);
1953 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1954 struct btrfs_dir_item
*item
,
1955 struct btrfs_key
*key
)
1957 struct btrfs_disk_key disk_key
;
1958 btrfs_dir_item_key(eb
, item
, &disk_key
);
1959 btrfs_disk_key_to_cpu(key
, &disk_key
);
1963 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1968 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1973 /* struct btrfs_header */
1974 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1975 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1977 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1978 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1979 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1980 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1981 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1983 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1984 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
1986 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1988 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1990 return (btrfs_header_flags(eb
) & flag
) == flag
;
1993 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1995 u64 flags
= btrfs_header_flags(eb
);
1996 btrfs_set_header_flags(eb
, flags
| flag
);
1997 return (flags
& flag
) == flag
;
2000 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2002 u64 flags
= btrfs_header_flags(eb
);
2003 btrfs_set_header_flags(eb
, flags
& ~flag
);
2004 return (flags
& flag
) == flag
;
2007 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2009 u64 flags
= btrfs_header_flags(eb
);
2010 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2013 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2016 u64 flags
= btrfs_header_flags(eb
);
2017 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2018 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2019 btrfs_set_header_flags(eb
, flags
);
2022 static inline unsigned long btrfs_header_fsid(void)
2024 return offsetof(struct btrfs_header
, fsid
);
2027 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2029 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2032 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2034 return btrfs_header_level(eb
) == 0;
2037 /* struct btrfs_root_item */
2038 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2040 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2041 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2042 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2044 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2046 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2047 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2048 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2049 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2050 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2051 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2052 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2053 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2055 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2057 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2059 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2061 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2063 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2066 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2068 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2071 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2073 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2076 /* struct btrfs_root_backup */
2077 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2079 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2081 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2082 tree_root_level
, 8);
2084 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2086 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2087 chunk_root_gen
, 64);
2088 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2089 chunk_root_level
, 8);
2091 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2093 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2094 extent_root_gen
, 64);
2095 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2096 extent_root_level
, 8);
2098 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2100 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2102 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2105 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2107 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2109 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2112 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2114 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2116 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2117 csum_root_level
, 8);
2118 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2120 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2122 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2125 /* struct btrfs_balance_item */
2126 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2128 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2129 struct btrfs_balance_item
*bi
,
2130 struct btrfs_disk_balance_args
*ba
)
2132 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2135 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2136 struct btrfs_balance_item
*bi
,
2137 struct btrfs_disk_balance_args
*ba
)
2139 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2142 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2143 struct btrfs_balance_item
*bi
,
2144 struct btrfs_disk_balance_args
*ba
)
2146 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2149 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2150 struct btrfs_balance_item
*bi
,
2151 struct btrfs_disk_balance_args
*ba
)
2153 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2156 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2157 struct btrfs_balance_item
*bi
,
2158 struct btrfs_disk_balance_args
*ba
)
2160 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2163 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2164 struct btrfs_balance_item
*bi
,
2165 struct btrfs_disk_balance_args
*ba
)
2167 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2171 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2172 struct btrfs_disk_balance_args
*disk
)
2174 memset(cpu
, 0, sizeof(*cpu
));
2176 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2177 cpu
->usage
= le64_to_cpu(disk
->usage
);
2178 cpu
->devid
= le64_to_cpu(disk
->devid
);
2179 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2180 cpu
->pend
= le64_to_cpu(disk
->pend
);
2181 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2182 cpu
->vend
= le64_to_cpu(disk
->vend
);
2183 cpu
->target
= le64_to_cpu(disk
->target
);
2184 cpu
->flags
= le64_to_cpu(disk
->flags
);
2185 cpu
->limit
= le64_to_cpu(disk
->limit
);
2189 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2190 struct btrfs_balance_args
*cpu
)
2192 memset(disk
, 0, sizeof(*disk
));
2194 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2195 disk
->usage
= cpu_to_le64(cpu
->usage
);
2196 disk
->devid
= cpu_to_le64(cpu
->devid
);
2197 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2198 disk
->pend
= cpu_to_le64(cpu
->pend
);
2199 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2200 disk
->vend
= cpu_to_le64(cpu
->vend
);
2201 disk
->target
= cpu_to_le64(cpu
->target
);
2202 disk
->flags
= cpu_to_le64(cpu
->flags
);
2203 disk
->limit
= cpu_to_le64(cpu
->limit
);
2206 /* struct btrfs_super_block */
2207 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2208 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2209 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2211 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2212 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2213 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2214 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2215 struct btrfs_super_block
, chunk_root_generation
, 64);
2216 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2218 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2220 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2221 chunk_root_level
, 8);
2222 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2224 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2225 log_root_transid
, 64);
2226 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2228 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2230 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2232 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2234 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2236 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2238 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2239 root_dir_objectid
, 64);
2240 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2242 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2244 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2245 compat_ro_flags
, 64);
2246 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2247 incompat_flags
, 64);
2248 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2250 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2251 cache_generation
, 64);
2252 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2253 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2254 uuid_tree_generation
, 64);
2256 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2258 u16 t
= btrfs_super_csum_type(s
);
2260 * csum type is validated at mount time
2262 return btrfs_csum_sizes
[t
];
2265 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2267 return offsetof(struct btrfs_leaf
, items
);
2270 /* struct btrfs_file_extent_item */
2271 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2272 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2273 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2274 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2275 struct btrfs_file_extent_item
, offset
, 64);
2276 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2277 struct btrfs_file_extent_item
, generation
, 64);
2278 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2279 struct btrfs_file_extent_item
, num_bytes
, 64);
2280 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2281 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2282 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2283 struct btrfs_file_extent_item
, compression
, 8);
2285 static inline unsigned long
2286 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2288 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2291 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2293 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2296 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2298 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2300 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2301 disk_num_bytes
, 64);
2302 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2304 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2306 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2308 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2310 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2312 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2313 other_encoding
, 16);
2316 * this returns the number of bytes used by the item on disk, minus the
2317 * size of any extent headers. If a file is compressed on disk, this is
2318 * the compressed size
2320 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2321 struct btrfs_item
*e
)
2323 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2326 /* this returns the number of file bytes represented by the inline item.
2327 * If an item is compressed, this is the uncompressed size
2329 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2331 struct btrfs_file_extent_item
*fi
)
2333 struct btrfs_map_token token
;
2335 btrfs_init_map_token(&token
);
2337 * return the space used on disk if this item isn't
2338 * compressed or encoded
2340 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
2341 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
2342 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
2343 return btrfs_file_extent_inline_item_len(eb
,
2344 btrfs_item_nr(slot
));
2347 /* otherwise use the ram bytes field */
2348 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
2352 /* btrfs_dev_stats_item */
2353 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2354 struct btrfs_dev_stats_item
*ptr
,
2359 read_extent_buffer(eb
, &val
,
2360 offsetof(struct btrfs_dev_stats_item
, values
) +
2361 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2366 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2367 struct btrfs_dev_stats_item
*ptr
,
2370 write_extent_buffer(eb
, &val
,
2371 offsetof(struct btrfs_dev_stats_item
, values
) +
2372 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2376 /* btrfs_qgroup_status_item */
2377 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2379 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2381 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2383 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2386 /* btrfs_qgroup_info_item */
2387 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2389 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2390 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2392 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2393 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2396 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2397 struct btrfs_qgroup_info_item
, generation
, 64);
2398 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2400 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2401 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2402 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2404 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2405 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2407 /* btrfs_qgroup_limit_item */
2408 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2410 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2412 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2414 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2416 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2419 /* btrfs_dev_replace_item */
2420 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2421 struct btrfs_dev_replace_item
, src_devid
, 64);
2422 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2423 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2425 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2427 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2429 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2431 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2432 num_write_errors
, 64);
2433 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2434 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2436 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2438 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2441 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2442 struct btrfs_dev_replace_item
, src_devid
, 64);
2443 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2444 struct btrfs_dev_replace_item
,
2445 cont_reading_from_srcdev_mode
, 64);
2446 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2447 struct btrfs_dev_replace_item
, replace_state
, 64);
2448 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2449 struct btrfs_dev_replace_item
, time_started
, 64);
2450 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2451 struct btrfs_dev_replace_item
, time_stopped
, 64);
2452 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2453 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2454 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2455 struct btrfs_dev_replace_item
,
2456 num_uncorrectable_read_errors
, 64);
2457 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2458 struct btrfs_dev_replace_item
, cursor_left
, 64);
2459 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2460 struct btrfs_dev_replace_item
, cursor_right
, 64);
2462 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2464 return sb
->s_fs_info
;
2467 /* helper function to cast into the data area of the leaf. */
2468 #define btrfs_item_ptr(leaf, slot, type) \
2469 ((type *)(btrfs_leaf_data(leaf) + \
2470 btrfs_item_offset_nr(leaf, slot)))
2472 #define btrfs_item_ptr_offset(leaf, slot) \
2473 ((unsigned long)(btrfs_leaf_data(leaf) + \
2474 btrfs_item_offset_nr(leaf, slot)))
2476 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2478 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2479 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2482 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2484 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2489 u64
btrfs_csum_bytes_to_leaves(struct btrfs_root
*root
, u64 csum_bytes
);
2491 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2494 return root
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2498 * Doing a truncate won't result in new nodes or leaves, just what we need for
2501 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2504 return root
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2507 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
2508 struct btrfs_root
*root
);
2509 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
2510 struct btrfs_root
*root
);
2511 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2513 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2514 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2515 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2516 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2517 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2518 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2519 struct btrfs_root
*root
, unsigned long count
);
2520 int btrfs_async_run_delayed_refs(struct btrfs_root
*root
,
2521 unsigned long count
, u64 transid
, int wait
);
2522 int btrfs_lookup_data_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2523 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2524 struct btrfs_root
*root
, u64 bytenr
,
2525 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2526 int btrfs_pin_extent(struct btrfs_root
*root
,
2527 u64 bytenr
, u64 num
, int reserved
);
2528 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
2529 u64 bytenr
, u64 num_bytes
);
2530 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
2531 struct extent_buffer
*eb
);
2532 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2533 struct btrfs_root
*root
,
2534 u64 objectid
, u64 offset
, u64 bytenr
);
2535 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2536 struct btrfs_fs_info
*info
,
2538 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2539 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2540 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
2541 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2542 struct btrfs_root
*root
, u64 parent
,
2544 struct btrfs_disk_key
*key
, int level
,
2545 u64 hint
, u64 empty_size
);
2546 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2547 struct btrfs_root
*root
,
2548 struct extent_buffer
*buf
,
2549 u64 parent
, int last_ref
);
2550 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2551 struct btrfs_root
*root
,
2552 u64 root_objectid
, u64 owner
,
2553 u64 offset
, u64 ram_bytes
,
2554 struct btrfs_key
*ins
);
2555 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2556 struct btrfs_root
*root
,
2557 u64 root_objectid
, u64 owner
, u64 offset
,
2558 struct btrfs_key
*ins
);
2559 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
2560 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2561 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2562 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2563 struct extent_buffer
*buf
, int full_backref
);
2564 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2565 struct extent_buffer
*buf
, int full_backref
);
2566 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2567 struct btrfs_root
*root
,
2568 u64 bytenr
, u64 num_bytes
, u64 flags
,
2569 int level
, int is_data
);
2570 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2571 struct btrfs_root
*root
,
2572 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2573 u64 owner
, u64 offset
);
2575 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
,
2577 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2578 u64 start
, u64 len
);
2579 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2580 struct btrfs_root
*root
);
2581 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2582 struct btrfs_root
*root
);
2583 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2584 struct btrfs_root
*root
,
2585 u64 bytenr
, u64 num_bytes
, u64 parent
,
2586 u64 root_objectid
, u64 owner
, u64 offset
);
2588 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2589 struct btrfs_root
*root
);
2590 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2591 struct btrfs_root
*root
);
2592 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2593 struct btrfs_root
*root
);
2594 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2595 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2596 int btrfs_read_block_groups(struct btrfs_root
*root
);
2597 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2598 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2599 struct btrfs_root
*root
, u64 bytes_used
,
2600 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2602 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2603 struct btrfs_fs_info
*fs_info
,
2604 const u64 chunk_offset
);
2605 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2606 struct btrfs_root
*root
, u64 group_start
,
2607 struct extent_map
*em
);
2608 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2609 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2610 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2611 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
2612 struct btrfs_root
*root
);
2613 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2614 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2616 enum btrfs_reserve_flush_enum
{
2617 /* If we are in the transaction, we can't flush anything.*/
2618 BTRFS_RESERVE_NO_FLUSH
,
2620 * Flushing delalloc may cause deadlock somewhere, in this
2621 * case, use FLUSH LIMIT
2623 BTRFS_RESERVE_FLUSH_LIMIT
,
2624 BTRFS_RESERVE_FLUSH_ALL
,
2627 int btrfs_check_data_free_space(struct inode
*inode
, u64 start
, u64 len
);
2628 int btrfs_alloc_data_chunk_ondemand(struct inode
*inode
, u64 bytes
);
2629 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 start
, u64 len
);
2630 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2632 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2633 struct btrfs_root
*root
);
2634 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2635 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2636 struct inode
*inode
);
2637 void btrfs_orphan_release_metadata(struct inode
*inode
);
2638 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2639 struct btrfs_block_rsv
*rsv
,
2641 u64
*qgroup_reserved
, bool use_global_rsv
);
2642 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
2643 struct btrfs_block_rsv
*rsv
,
2644 u64 qgroup_reserved
);
2645 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2646 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2647 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 start
, u64 len
);
2648 void btrfs_delalloc_release_space(struct inode
*inode
, u64 start
, u64 len
);
2649 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2650 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
2651 unsigned short type
);
2652 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2653 struct btrfs_block_rsv
*rsv
);
2654 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
2655 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2656 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2657 enum btrfs_reserve_flush_enum flush
);
2658 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2659 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2660 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2661 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2662 enum btrfs_reserve_flush_enum flush
);
2663 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2664 struct btrfs_block_rsv
*dst_rsv
,
2666 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2667 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2669 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2670 struct btrfs_block_rsv
*block_rsv
,
2672 int btrfs_inc_block_group_ro(struct btrfs_root
*root
,
2673 struct btrfs_block_group_cache
*cache
);
2674 void btrfs_dec_block_group_ro(struct btrfs_root
*root
,
2675 struct btrfs_block_group_cache
*cache
);
2676 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2677 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2678 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2679 u64 start
, u64 end
);
2680 int btrfs_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2681 u64 num_bytes
, u64
*actual_bytes
);
2682 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2683 struct btrfs_root
*root
, u64 type
);
2684 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2686 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2687 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2688 struct btrfs_fs_info
*fs_info
);
2689 int __get_raid_index(u64 flags
);
2690 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
2691 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
2692 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2693 void check_system_chunk(struct btrfs_trans_handle
*trans
,
2694 struct btrfs_root
*root
,
2696 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2697 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2700 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2701 int level
, int *slot
);
2702 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2703 int btrfs_previous_item(struct btrfs_root
*root
,
2704 struct btrfs_path
*path
, u64 min_objectid
,
2706 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2707 struct btrfs_path
*path
, u64 min_objectid
);
2708 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2709 struct btrfs_path
*path
,
2710 struct btrfs_key
*new_key
);
2711 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2712 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2713 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2714 struct btrfs_key
*key
, int lowest_level
,
2716 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2717 struct btrfs_path
*path
,
2719 enum btrfs_compare_tree_result
{
2720 BTRFS_COMPARE_TREE_NEW
,
2721 BTRFS_COMPARE_TREE_DELETED
,
2722 BTRFS_COMPARE_TREE_CHANGED
,
2723 BTRFS_COMPARE_TREE_SAME
,
2725 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2726 struct btrfs_root
*right_root
,
2727 struct btrfs_path
*left_path
,
2728 struct btrfs_path
*right_path
,
2729 struct btrfs_key
*key
,
2730 enum btrfs_compare_tree_result result
,
2732 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2733 struct btrfs_root
*right_root
,
2734 btrfs_changed_cb_t cb
, void *ctx
);
2735 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2736 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2737 struct extent_buffer
*parent
, int parent_slot
,
2738 struct extent_buffer
**cow_ret
);
2739 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2740 struct btrfs_root
*root
,
2741 struct extent_buffer
*buf
,
2742 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2743 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2744 struct extent_buffer
*buf
);
2745 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2747 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2748 u32 new_size
, int from_end
);
2749 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2750 struct btrfs_root
*root
,
2751 struct btrfs_path
*path
,
2752 struct btrfs_key
*new_key
,
2753 unsigned long split_offset
);
2754 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2755 struct btrfs_root
*root
,
2756 struct btrfs_path
*path
,
2757 struct btrfs_key
*new_key
);
2758 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2759 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2760 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2761 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2763 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
2764 struct btrfs_path
*p
, u64 time_seq
);
2765 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2766 struct btrfs_key
*key
, struct btrfs_path
*p
,
2767 int find_higher
, int return_any
);
2768 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2769 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2770 int start_slot
, u64
*last_ret
,
2771 struct btrfs_key
*progress
);
2772 void btrfs_release_path(struct btrfs_path
*p
);
2773 struct btrfs_path
*btrfs_alloc_path(void);
2774 void btrfs_free_path(struct btrfs_path
*p
);
2775 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2776 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2777 struct extent_buffer
*held
, int held_rw
);
2778 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2780 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2781 struct btrfs_path
*path
, int slot
, int nr
);
2782 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2783 struct btrfs_root
*root
,
2784 struct btrfs_path
*path
)
2786 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2789 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2790 struct btrfs_key
*cpu_key
, u32
*data_size
,
2791 u32 total_data
, u32 total_size
, int nr
);
2792 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2793 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2794 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2795 struct btrfs_root
*root
,
2796 struct btrfs_path
*path
,
2797 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2799 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2800 struct btrfs_root
*root
,
2801 struct btrfs_path
*path
,
2802 struct btrfs_key
*key
,
2805 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2808 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2809 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2810 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2812 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2813 struct btrfs_path
*p
, u64 time_seq
)
2816 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2817 return btrfs_next_old_leaf(root
, p
, time_seq
);
2820 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2822 return btrfs_next_old_item(root
, p
, 0);
2824 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2825 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2826 struct btrfs_block_rsv
*block_rsv
,
2827 int update_ref
, int for_reloc
);
2828 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2829 struct btrfs_root
*root
,
2830 struct extent_buffer
*node
,
2831 struct extent_buffer
*parent
);
2832 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2835 * Get synced with close_ctree()
2838 return fs_info
->closing
;
2842 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2843 * anything except sleeping. This function is used to check the status of
2846 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
2848 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
2849 btrfs_fs_closing(root
->fs_info
));
2852 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2854 kfree(fs_info
->balance_ctl
);
2855 kfree(fs_info
->delayed_root
);
2856 kfree(fs_info
->extent_root
);
2857 kfree(fs_info
->tree_root
);
2858 kfree(fs_info
->chunk_root
);
2859 kfree(fs_info
->dev_root
);
2860 kfree(fs_info
->csum_root
);
2861 kfree(fs_info
->quota_root
);
2862 kfree(fs_info
->uuid_root
);
2863 kfree(fs_info
->free_space_root
);
2864 kfree(fs_info
->super_copy
);
2865 kfree(fs_info
->super_for_commit
);
2866 security_free_mnt_opts(&fs_info
->security_opts
);
2870 /* tree mod log functions from ctree.c */
2871 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2872 struct seq_list
*elem
);
2873 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2874 struct seq_list
*elem
);
2875 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2878 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2879 struct btrfs_path
*path
,
2880 u64 root_id
, u64 ref_id
);
2881 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2882 struct btrfs_root
*tree_root
,
2883 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2884 const char *name
, int name_len
);
2885 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2886 struct btrfs_root
*tree_root
,
2887 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2888 const char *name
, int name_len
);
2889 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2890 struct btrfs_key
*key
);
2891 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2892 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2894 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2895 struct btrfs_root
*root
,
2896 struct btrfs_key
*key
,
2897 struct btrfs_root_item
*item
);
2898 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
2899 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
2900 struct btrfs_key
*root_key
);
2901 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2902 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2903 struct extent_buffer
*node
);
2904 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2905 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
2906 struct btrfs_root
*root
);
2909 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
2910 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2912 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
2913 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2915 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
2916 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
2920 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
2921 const char *name
, int name_len
);
2922 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2923 struct btrfs_root
*root
, const char *name
,
2924 int name_len
, struct inode
*dir
,
2925 struct btrfs_key
*location
, u8 type
, u64 index
);
2926 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2927 struct btrfs_root
*root
,
2928 struct btrfs_path
*path
, u64 dir
,
2929 const char *name
, int name_len
,
2931 struct btrfs_dir_item
*
2932 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2933 struct btrfs_root
*root
,
2934 struct btrfs_path
*path
, u64 dir
,
2935 u64 objectid
, const char *name
, int name_len
,
2937 struct btrfs_dir_item
*
2938 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2939 struct btrfs_path
*path
, u64 dirid
,
2940 const char *name
, int name_len
);
2941 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2942 struct btrfs_root
*root
,
2943 struct btrfs_path
*path
,
2944 struct btrfs_dir_item
*di
);
2945 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2946 struct btrfs_root
*root
,
2947 struct btrfs_path
*path
, u64 objectid
,
2948 const char *name
, u16 name_len
,
2949 const void *data
, u16 data_len
);
2950 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2951 struct btrfs_root
*root
,
2952 struct btrfs_path
*path
, u64 dir
,
2953 const char *name
, u16 name_len
,
2955 int verify_dir_item(struct btrfs_root
*root
,
2956 struct extent_buffer
*leaf
,
2957 struct btrfs_dir_item
*dir_item
);
2958 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2959 struct btrfs_path
*path
,
2964 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2965 struct btrfs_root
*root
, u64 offset
);
2966 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2967 struct btrfs_root
*root
, u64 offset
);
2968 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2971 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2972 struct btrfs_root
*root
,
2973 const char *name
, int name_len
,
2974 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2975 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2976 struct btrfs_root
*root
,
2977 const char *name
, int name_len
,
2978 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2979 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2980 struct btrfs_root
*root
,
2981 struct btrfs_path
*path
, u64 objectid
);
2982 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2983 *root
, struct btrfs_path
*path
,
2984 struct btrfs_key
*location
, int mod
);
2986 struct btrfs_inode_extref
*
2987 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
2988 struct btrfs_root
*root
,
2989 struct btrfs_path
*path
,
2990 const char *name
, int name_len
,
2991 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
2994 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
2995 u64 ref_objectid
, const char *name
,
2997 struct btrfs_inode_extref
**extref_ret
);
3000 struct btrfs_dio_private
;
3001 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3002 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3003 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3004 struct bio
*bio
, u32
*dst
);
3005 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3006 struct bio
*bio
, u64 logical_offset
);
3007 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3008 struct btrfs_root
*root
,
3009 u64 objectid
, u64 pos
,
3010 u64 disk_offset
, u64 disk_num_bytes
,
3011 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3012 u8 compression
, u8 encryption
, u16 other_encoding
);
3013 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3014 struct btrfs_root
*root
,
3015 struct btrfs_path
*path
, u64 objectid
,
3016 u64 bytenr
, int mod
);
3017 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3018 struct btrfs_root
*root
,
3019 struct btrfs_ordered_sum
*sums
);
3020 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3021 struct bio
*bio
, u64 file_start
, int contig
);
3022 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3023 struct list_head
*list
, int search_commit
);
3024 void btrfs_extent_item_to_extent_map(struct inode
*inode
,
3025 const struct btrfs_path
*path
,
3026 struct btrfs_file_extent_item
*fi
,
3027 const bool new_inline
,
3028 struct extent_map
*em
);
3031 struct btrfs_delalloc_work
{
3032 struct inode
*inode
;
3034 struct completion completion
;
3035 struct list_head list
;
3036 struct btrfs_work work
;
3039 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3041 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3043 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3044 size_t pg_offset
, u64 start
, u64 len
,
3046 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3047 u64
*orig_start
, u64
*orig_block_len
,
3050 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3051 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3052 #define ClearPageChecked ClearPageFsMisc
3053 #define SetPageChecked SetPageFsMisc
3054 #define PageChecked PageFsMisc
3057 /* This forces readahead on a given range of bytes in an inode */
3058 static inline void btrfs_force_ra(struct address_space
*mapping
,
3059 struct file_ra_state
*ra
, struct file
*file
,
3060 pgoff_t offset
, unsigned long req_size
)
3062 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3065 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3066 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3067 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3068 struct btrfs_root
*root
,
3069 struct inode
*dir
, struct inode
*inode
,
3070 const char *name
, int name_len
);
3071 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3072 struct inode
*parent_inode
, struct inode
*inode
,
3073 const char *name
, int name_len
, int add_backref
, u64 index
);
3074 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3075 struct btrfs_root
*root
,
3076 struct inode
*dir
, u64 objectid
,
3077 const char *name
, int name_len
);
3078 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3080 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3081 struct btrfs_root
*root
,
3082 struct inode
*inode
, u64 new_size
,
3085 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3086 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3088 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3089 struct extent_state
**cached_state
);
3090 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3091 struct btrfs_root
*new_root
,
3092 struct btrfs_root
*parent_root
,
3094 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3095 size_t size
, struct bio
*bio
,
3096 unsigned long bio_flags
);
3097 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3098 int btrfs_readpage(struct file
*file
, struct page
*page
);
3099 void btrfs_evict_inode(struct inode
*inode
);
3100 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3101 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3102 void btrfs_destroy_inode(struct inode
*inode
);
3103 int btrfs_drop_inode(struct inode
*inode
);
3104 int btrfs_init_cachep(void);
3105 void btrfs_destroy_cachep(void);
3106 long btrfs_ioctl_trans_end(struct file
*file
);
3107 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3108 struct btrfs_root
*root
, int *was_new
);
3109 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3110 size_t pg_offset
, u64 start
, u64 end
,
3112 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3113 struct btrfs_root
*root
,
3114 struct inode
*inode
);
3115 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3116 struct btrfs_root
*root
, struct inode
*inode
);
3117 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3118 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3119 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3120 struct btrfs_root
*root
);
3121 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3122 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3123 void btrfs_add_delayed_iput(struct inode
*inode
);
3124 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3125 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3126 u64 start
, u64 num_bytes
, u64 min_size
,
3127 loff_t actual_len
, u64
*alloc_hint
);
3128 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3129 struct btrfs_trans_handle
*trans
, int mode
,
3130 u64 start
, u64 num_bytes
, u64 min_size
,
3131 loff_t actual_len
, u64
*alloc_hint
);
3132 int btrfs_inode_check_errors(struct inode
*inode
);
3133 extern const struct dentry_operations btrfs_dentry_operations
;
3134 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3135 void btrfs_test_inode_set_ops(struct inode
*inode
);
3139 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3140 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3141 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3142 void btrfs_update_iflags(struct inode
*inode
);
3143 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3144 int btrfs_is_empty_uuid(u8
*uuid
);
3145 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3146 struct btrfs_ioctl_defrag_range_args
*range
,
3147 u64 newer_than
, unsigned long max_pages
);
3148 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3149 struct btrfs_ioctl_space_info
*space
);
3150 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3151 struct btrfs_ioctl_balance_args
*bargs
);
3152 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
3153 struct file
*dst_file
, u64 dst_loff
);
3156 int btrfs_auto_defrag_init(void);
3157 void btrfs_auto_defrag_exit(void);
3158 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3159 struct inode
*inode
);
3160 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3161 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3162 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3163 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3165 extern const struct file_operations btrfs_file_operations
;
3166 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3167 struct btrfs_root
*root
, struct inode
*inode
,
3168 struct btrfs_path
*path
, u64 start
, u64 end
,
3169 u64
*drop_end
, int drop_cache
,
3171 u32 extent_item_size
,
3173 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3174 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3175 u64 end
, int drop_cache
);
3176 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3177 struct inode
*inode
, u64 start
, u64 end
);
3178 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3179 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3180 struct page
**pages
, size_t num_pages
,
3181 loff_t pos
, size_t write_bytes
,
3182 struct extent_state
**cached
);
3183 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3184 ssize_t
btrfs_copy_file_range(struct file
*file_in
, loff_t pos_in
,
3185 struct file
*file_out
, loff_t pos_out
,
3186 size_t len
, unsigned int flags
);
3187 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
3188 struct file
*file_out
, loff_t pos_out
, u64 len
);
3191 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3192 struct btrfs_root
*root
);
3195 int btrfs_init_sysfs(void);
3196 void btrfs_exit_sysfs(void);
3197 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3198 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3201 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3204 int btrfs_parse_options(struct btrfs_root
*root
, char *options
,
3205 unsigned long new_flags
);
3206 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3208 #ifdef CONFIG_PRINTK
3210 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3212 static inline __printf(2, 3)
3213 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3218 #define btrfs_emerg(fs_info, fmt, args...) \
3219 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3220 #define btrfs_alert(fs_info, fmt, args...) \
3221 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3222 #define btrfs_crit(fs_info, fmt, args...) \
3223 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3224 #define btrfs_err(fs_info, fmt, args...) \
3225 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3226 #define btrfs_warn(fs_info, fmt, args...) \
3227 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3228 #define btrfs_notice(fs_info, fmt, args...) \
3229 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3230 #define btrfs_info(fs_info, fmt, args...) \
3231 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3234 * Wrappers that use printk_in_rcu
3236 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3237 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3238 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3239 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3240 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3241 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3242 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3243 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3244 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3245 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3246 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3247 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3248 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3249 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3252 * Wrappers that use a ratelimited printk_in_rcu
3254 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3255 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3256 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3257 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3258 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3259 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3260 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3261 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3262 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3263 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3264 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3265 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3266 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3267 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3270 * Wrappers that use a ratelimited printk
3272 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3273 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3274 #define btrfs_alert_rl(fs_info, fmt, args...) \
3275 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3276 #define btrfs_crit_rl(fs_info, fmt, args...) \
3277 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3278 #define btrfs_err_rl(fs_info, fmt, args...) \
3279 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3280 #define btrfs_warn_rl(fs_info, fmt, args...) \
3281 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3282 #define btrfs_notice_rl(fs_info, fmt, args...) \
3283 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3284 #define btrfs_info_rl(fs_info, fmt, args...) \
3285 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3287 #define btrfs_debug(fs_info, fmt, args...) \
3288 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3289 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3290 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3291 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3292 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3293 #define btrfs_debug_rl(fs_info, fmt, args...) \
3294 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3296 #define btrfs_debug(fs_info, fmt, args...) \
3297 no_printk(KERN_DEBUG fmt, ##args)
3298 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3299 no_printk(KERN_DEBUG fmt, ##args)
3300 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3301 no_printk(KERN_DEBUG fmt, ##args)
3302 #define btrfs_debug_rl(fs_info, fmt, args...) \
3303 no_printk(KERN_DEBUG fmt, ##args)
3306 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3309 btrfs_printk(fs_info, fmt, ##args); \
3310 rcu_read_unlock(); \
3313 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3315 static DEFINE_RATELIMIT_STATE(_rs, \
3316 DEFAULT_RATELIMIT_INTERVAL, \
3317 DEFAULT_RATELIMIT_BURST); \
3318 if (__ratelimit(&_rs)) \
3319 btrfs_printk(fs_info, fmt, ##args); \
3322 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3325 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3326 rcu_read_unlock(); \
3329 #ifdef CONFIG_BTRFS_ASSERT
3332 static inline void assfail(char *expr
, char *file
, int line
)
3334 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3339 #define ASSERT(expr) \
3340 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3342 #define ASSERT(expr) ((void)0)
3347 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3348 unsigned int line
, int errno
, const char *fmt
, ...);
3350 const char *btrfs_decode_error(int errno
);
3353 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3354 struct btrfs_root
*root
, const char *function
,
3355 unsigned int line
, int errno
);
3358 * Call btrfs_abort_transaction as early as possible when an error condition is
3359 * detected, that way the exact line number is reported.
3361 #define btrfs_abort_transaction(trans, root, errno) \
3363 /* Report first abort since mount */ \
3364 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3365 &((root)->fs_info->fs_state))) { \
3366 WARN(1, KERN_DEBUG \
3367 "BTRFS: Transaction aborted (error %d)\n", \
3370 __btrfs_abort_transaction((trans), (root), __func__, \
3371 __LINE__, (errno)); \
3374 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3376 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3377 (errno), fmt, ##args); \
3382 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3383 unsigned int line
, int errno
, const char *fmt
, ...);
3385 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3386 * will panic(). Otherwise we BUG() here.
3388 #define btrfs_panic(fs_info, errno, fmt, args...) \
3390 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3395 /* compatibility and incompatibility defines */
3397 #define btrfs_set_fs_incompat(__fs_info, opt) \
3398 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3400 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3403 struct btrfs_super_block
*disk_super
;
3406 disk_super
= fs_info
->super_copy
;
3407 features
= btrfs_super_incompat_flags(disk_super
);
3408 if (!(features
& flag
)) {
3409 spin_lock(&fs_info
->super_lock
);
3410 features
= btrfs_super_incompat_flags(disk_super
);
3411 if (!(features
& flag
)) {
3413 btrfs_set_super_incompat_flags(disk_super
, features
);
3414 btrfs_info(fs_info
, "setting %llu feature flag",
3417 spin_unlock(&fs_info
->super_lock
);
3421 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3422 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3424 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3427 struct btrfs_super_block
*disk_super
;
3430 disk_super
= fs_info
->super_copy
;
3431 features
= btrfs_super_incompat_flags(disk_super
);
3432 if (features
& flag
) {
3433 spin_lock(&fs_info
->super_lock
);
3434 features
= btrfs_super_incompat_flags(disk_super
);
3435 if (features
& flag
) {
3437 btrfs_set_super_incompat_flags(disk_super
, features
);
3438 btrfs_info(fs_info
, "clearing %llu feature flag",
3441 spin_unlock(&fs_info
->super_lock
);
3445 #define btrfs_fs_incompat(fs_info, opt) \
3446 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3448 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3450 struct btrfs_super_block
*disk_super
;
3451 disk_super
= fs_info
->super_copy
;
3452 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3455 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3456 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3458 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3461 struct btrfs_super_block
*disk_super
;
3464 disk_super
= fs_info
->super_copy
;
3465 features
= btrfs_super_compat_ro_flags(disk_super
);
3466 if (!(features
& flag
)) {
3467 spin_lock(&fs_info
->super_lock
);
3468 features
= btrfs_super_compat_ro_flags(disk_super
);
3469 if (!(features
& flag
)) {
3471 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3472 btrfs_info(fs_info
, "setting %llu ro feature flag",
3475 spin_unlock(&fs_info
->super_lock
);
3479 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3480 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3482 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3485 struct btrfs_super_block
*disk_super
;
3488 disk_super
= fs_info
->super_copy
;
3489 features
= btrfs_super_compat_ro_flags(disk_super
);
3490 if (features
& flag
) {
3491 spin_lock(&fs_info
->super_lock
);
3492 features
= btrfs_super_compat_ro_flags(disk_super
);
3493 if (features
& flag
) {
3495 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3496 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3499 spin_unlock(&fs_info
->super_lock
);
3503 #define btrfs_fs_compat_ro(fs_info, opt) \
3504 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3506 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3508 struct btrfs_super_block
*disk_super
;
3509 disk_super
= fs_info
->super_copy
;
3510 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3514 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3515 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3516 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3517 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3518 struct inode
*inode
, struct inode
*dir
);
3520 #define btrfs_get_acl NULL
3521 #define btrfs_set_acl NULL
3522 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3523 struct inode
*inode
, struct inode
*dir
)
3530 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3531 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3532 struct btrfs_root
*root
);
3533 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3534 struct btrfs_root
*root
);
3535 int btrfs_recover_relocation(struct btrfs_root
*root
);
3536 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3537 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3538 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3539 struct extent_buffer
*cow
);
3540 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3541 u64
*bytes_to_reserve
);
3542 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3543 struct btrfs_pending_snapshot
*pending
);
3546 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3547 u64 end
, struct btrfs_scrub_progress
*progress
,
3548 int readonly
, int is_dev_replace
);
3549 void btrfs_scrub_pause(struct btrfs_root
*root
);
3550 void btrfs_scrub_continue(struct btrfs_root
*root
);
3551 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3552 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3553 struct btrfs_device
*dev
);
3554 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3555 struct btrfs_scrub_progress
*progress
);
3558 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3559 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3560 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3562 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3564 btrfs_bio_counter_sub(fs_info
, 1);
3568 struct reada_control
{
3569 struct btrfs_root
*root
; /* tree to prefetch */
3570 struct btrfs_key key_start
;
3571 struct btrfs_key key_end
; /* exclusive */
3574 wait_queue_head_t wait
;
3576 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3577 struct btrfs_key
*start
, struct btrfs_key
*end
);
3578 int btrfs_reada_wait(void *handle
);
3579 void btrfs_reada_detach(void *handle
);
3580 int btree_readahead_hook(struct btrfs_fs_info
*fs_info
,
3581 struct extent_buffer
*eb
, u64 start
, int err
);
3583 static inline int is_fstree(u64 rootid
)
3585 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3586 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3587 !btrfs_qgroup_level(rootid
)))
3592 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3594 return signal_pending(current
);
3597 /* Sanity test specific functions */
3598 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3599 void btrfs_test_destroy_inode(struct inode
*inode
);
3602 static inline int btrfs_test_is_dummy_root(struct btrfs_root
*root
)
3604 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3605 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT
, &root
->state
)))