2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/sched/signal.h>
24 #include <linux/highmem.h>
26 #include <linux/rwsem.h>
27 #include <linux/semaphore.h>
28 #include <linux/completion.h>
29 #include <linux/backing-dev.h>
30 #include <linux/wait.h>
31 #include <linux/slab.h>
32 #include <linux/kobject.h>
33 #include <trace/events/btrfs.h>
34 #include <asm/kmap_types.h>
35 #include <linux/pagemap.h>
36 #include <linux/btrfs.h>
37 #include <linux/btrfs_tree.h>
38 #include <linux/workqueue.h>
39 #include <linux/security.h>
40 #include <linux/sizes.h>
41 #include <linux/dynamic_debug.h>
42 #include <linux/refcount.h>
43 #include "extent_io.h"
44 #include "extent_map.h"
45 #include "async-thread.h"
47 struct btrfs_trans_handle
;
48 struct btrfs_transaction
;
49 struct btrfs_pending_snapshot
;
50 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
51 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
52 extern struct kmem_cache
*btrfs_path_cachep
;
53 extern struct kmem_cache
*btrfs_free_space_cachep
;
54 struct btrfs_ordered_sum
;
56 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
57 #define STATIC noinline
59 #define STATIC static noinline
62 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
64 #define BTRFS_MAX_MIRRORS 3
66 #define BTRFS_MAX_LEVEL 8
68 #define BTRFS_COMPAT_EXTENT_TREE_V0
71 * the max metadata block size. This limit is somewhat artificial,
72 * but the memmove costs go through the roof for larger blocks.
74 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
77 * we can actually store much bigger names, but lets not confuse the rest
80 #define BTRFS_NAME_LEN 255
83 * Theoretical limit is larger, but we keep this down to a sane
84 * value. That should limit greatly the possibility of collisions on
87 #define BTRFS_LINK_MAX 65535U
89 static const int btrfs_csum_sizes
[] = { 4 };
91 /* four bytes for CRC32 */
92 #define BTRFS_EMPTY_DIR_SIZE 0
94 /* ioprio of readahead is set to idle */
95 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
97 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
99 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
102 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
104 static inline u32
count_max_extents(u64 size
)
106 return div_u64(size
+ BTRFS_MAX_EXTENT_SIZE
- 1, BTRFS_MAX_EXTENT_SIZE
);
109 struct btrfs_mapping_tree
{
110 struct extent_map_tree map_tree
;
113 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
115 BUG_ON(num_stripes
== 0);
116 return sizeof(struct btrfs_chunk
) +
117 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
123 #define BTRFS_FS_STATE_ERROR 0
124 #define BTRFS_FS_STATE_REMOUNTING 1
125 #define BTRFS_FS_STATE_TRANS_ABORTED 2
126 #define BTRFS_FS_STATE_DEV_REPLACING 3
127 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
129 #define BTRFS_BACKREF_REV_MAX 256
130 #define BTRFS_BACKREF_REV_SHIFT 56
131 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
132 BTRFS_BACKREF_REV_SHIFT)
134 #define BTRFS_OLD_BACKREF_REV 0
135 #define BTRFS_MIXED_BACKREF_REV 1
138 * every tree block (leaf or node) starts with this header.
140 struct btrfs_header
{
141 /* these first four must match the super block */
142 u8 csum
[BTRFS_CSUM_SIZE
];
143 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
144 __le64 bytenr
; /* which block this node is supposed to live in */
147 /* allowed to be different from the super from here on down */
148 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
153 } __attribute__ ((__packed__
));
156 * this is a very generous portion of the super block, giving us
157 * room to translate 14 chunks with 3 stripes each.
159 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
162 * just in case we somehow lose the roots and are not able to mount,
163 * we store an array of the roots from previous transactions
166 #define BTRFS_NUM_BACKUP_ROOTS 4
167 struct btrfs_root_backup
{
169 __le64 tree_root_gen
;
172 __le64 chunk_root_gen
;
175 __le64 extent_root_gen
;
184 __le64 csum_root_gen
;
194 u8 extent_root_level
;
198 /* future and to align */
200 } __attribute__ ((__packed__
));
203 * the super block basically lists the main trees of the FS
204 * it currently lacks any block count etc etc
206 struct btrfs_super_block
{
207 u8 csum
[BTRFS_CSUM_SIZE
];
208 /* the first 4 fields must match struct btrfs_header */
209 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
210 __le64 bytenr
; /* this block number */
213 /* allowed to be different from the btrfs_header from here own down */
220 /* this will help find the new super based on the log root */
221 __le64 log_root_transid
;
224 __le64 root_dir_objectid
;
228 __le32 __unused_leafsize
;
230 __le32 sys_chunk_array_size
;
231 __le64 chunk_root_generation
;
233 __le64 compat_ro_flags
;
234 __le64 incompat_flags
;
239 struct btrfs_dev_item dev_item
;
241 char label
[BTRFS_LABEL_SIZE
];
243 __le64 cache_generation
;
244 __le64 uuid_tree_generation
;
246 /* future expansion */
248 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
249 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
250 } __attribute__ ((__packed__
));
253 * Compat flags that we support. If any incompat flags are set other than the
254 * ones specified below then we will fail to mount
256 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
257 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
258 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
260 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
261 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
262 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
264 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
265 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
267 #define BTRFS_FEATURE_INCOMPAT_SUPP \
268 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
269 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
270 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
271 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
272 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
273 BTRFS_FEATURE_INCOMPAT_RAID56 | \
274 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
275 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
276 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
278 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
279 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
280 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
283 * A leaf is full of items. offset and size tell us where to find
284 * the item in the leaf (relative to the start of the data area)
287 struct btrfs_disk_key key
;
290 } __attribute__ ((__packed__
));
293 * leaves have an item area and a data area:
294 * [item0, item1....itemN] [free space] [dataN...data1, data0]
296 * The data is separate from the items to get the keys closer together
300 struct btrfs_header header
;
301 struct btrfs_item items
[];
302 } __attribute__ ((__packed__
));
305 * all non-leaf blocks are nodes, they hold only keys and pointers to
308 struct btrfs_key_ptr
{
309 struct btrfs_disk_key key
;
312 } __attribute__ ((__packed__
));
315 struct btrfs_header header
;
316 struct btrfs_key_ptr ptrs
[];
317 } __attribute__ ((__packed__
));
320 * btrfs_paths remember the path taken from the root down to the leaf.
321 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
322 * to any other levels that are present.
324 * The slots array records the index of the item or block pointer
325 * used while walking the tree.
327 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
329 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
330 int slots
[BTRFS_MAX_LEVEL
];
331 /* if there is real range locking, this locks field will change */
332 u8 locks
[BTRFS_MAX_LEVEL
];
334 /* keep some upper locks as we walk down */
338 * set by btrfs_split_item, tells search_slot to keep all locks
339 * and to force calls to keep space in the nodes
341 unsigned int search_for_split
:1;
342 unsigned int keep_locks
:1;
343 unsigned int skip_locking
:1;
344 unsigned int leave_spinning
:1;
345 unsigned int search_commit_root
:1;
346 unsigned int need_commit_sem
:1;
347 unsigned int skip_release_on_error
:1;
349 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
350 sizeof(struct btrfs_item))
351 struct btrfs_dev_replace
{
352 u64 replace_state
; /* see #define above */
353 u64 time_started
; /* seconds since 1-Jan-1970 */
354 u64 time_stopped
; /* seconds since 1-Jan-1970 */
355 atomic64_t num_write_errors
;
356 atomic64_t num_uncorrectable_read_errors
;
359 u64 committed_cursor_left
;
360 u64 cursor_left_last_write_of_item
;
363 u64 cont_reading_from_srcdev_mode
; /* see #define above */
366 int item_needs_writeback
;
367 struct btrfs_device
*srcdev
;
368 struct btrfs_device
*tgtdev
;
371 atomic_t nesting_level
;
372 struct mutex lock_finishing_cancel_unmount
;
375 atomic_t blocking_readers
;
376 wait_queue_head_t read_lock_wq
;
378 struct btrfs_scrub_progress scrub_progress
;
381 /* For raid type sysfs entries */
382 struct raid_kobject
{
387 struct btrfs_space_info
{
390 u64 total_bytes
; /* total bytes in the space,
391 this doesn't take mirrors into account */
392 u64 bytes_used
; /* total bytes used,
393 this doesn't take mirrors into account */
394 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
395 transaction finishes */
396 u64 bytes_reserved
; /* total bytes the allocator has reserved for
397 current allocations */
398 u64 bytes_may_use
; /* number of bytes that may be used for
399 delalloc/allocations */
400 u64 bytes_readonly
; /* total bytes that are read only */
402 u64 max_extent_size
; /* This will hold the maximum extent size of
403 the space info if we had an ENOSPC in the
406 unsigned int full
:1; /* indicates that we cannot allocate any more
407 chunks for this space */
408 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
410 unsigned int flush
:1; /* set if we are trying to make space */
412 unsigned int force_alloc
; /* set if we need to force a chunk
413 alloc for this space */
415 u64 disk_used
; /* total bytes used on disk */
416 u64 disk_total
; /* total bytes on disk, takes mirrors into
422 * bytes_pinned is kept in line with what is actually pinned, as in
423 * we've called update_block_group and dropped the bytes_used counter
424 * and increased the bytes_pinned counter. However this means that
425 * bytes_pinned does not reflect the bytes that will be pinned once the
426 * delayed refs are flushed, so this counter is inc'ed every time we
427 * call btrfs_free_extent so it is a realtime count of what will be
428 * freed once the transaction is committed. It will be zeroed every
429 * time the transaction commits.
431 struct percpu_counter total_bytes_pinned
;
433 struct list_head list
;
434 /* Protected by the spinlock 'lock'. */
435 struct list_head ro_bgs
;
436 struct list_head priority_tickets
;
437 struct list_head tickets
;
439 * tickets_id just indicates the next ticket will be handled, so note
440 * it's not stored per ticket.
444 struct rw_semaphore groups_sem
;
445 /* for block groups in our same type */
446 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
447 wait_queue_head_t wait
;
450 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
453 #define BTRFS_BLOCK_RSV_GLOBAL 1
454 #define BTRFS_BLOCK_RSV_DELALLOC 2
455 #define BTRFS_BLOCK_RSV_TRANS 3
456 #define BTRFS_BLOCK_RSV_CHUNK 4
457 #define BTRFS_BLOCK_RSV_DELOPS 5
458 #define BTRFS_BLOCK_RSV_EMPTY 6
459 #define BTRFS_BLOCK_RSV_TEMP 7
461 struct btrfs_block_rsv
{
464 struct btrfs_space_info
*space_info
;
468 unsigned short failfast
;
472 * free clusters are used to claim free space in relatively large chunks,
473 * allowing us to do less seeky writes. They are used for all metadata
474 * allocations. In ssd_spread mode they are also used for data allocations.
476 struct btrfs_free_cluster
{
478 spinlock_t refill_lock
;
481 /* largest extent in this cluster */
484 /* first extent starting offset */
487 /* We did a full search and couldn't create a cluster */
490 struct btrfs_block_group_cache
*block_group
;
492 * when a cluster is allocated from a block group, we put the
493 * cluster onto a list in the block group so that it can
494 * be freed before the block group is freed.
496 struct list_head block_group_list
;
499 enum btrfs_caching_type
{
501 BTRFS_CACHE_STARTED
= 1,
502 BTRFS_CACHE_FAST
= 2,
503 BTRFS_CACHE_FINISHED
= 3,
504 BTRFS_CACHE_ERROR
= 4,
507 enum btrfs_disk_cache_state
{
508 BTRFS_DC_WRITTEN
= 0,
514 struct btrfs_caching_control
{
515 struct list_head list
;
517 wait_queue_head_t wait
;
518 struct btrfs_work work
;
519 struct btrfs_block_group_cache
*block_group
;
524 /* Once caching_thread() finds this much free space, it will wake up waiters. */
525 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
527 struct btrfs_io_ctl
{
531 struct btrfs_fs_info
*fs_info
;
538 unsigned check_crcs
:1;
542 * Tree to record all locked full stripes of a RAID5/6 block group
544 struct btrfs_full_stripe_locks_tree
{
549 struct btrfs_block_group_cache
{
550 struct btrfs_key key
;
551 struct btrfs_block_group_item item
;
552 struct btrfs_fs_info
*fs_info
;
560 u64 cache_generation
;
563 * If the free space extent count exceeds this number, convert the block
566 u32 bitmap_high_thresh
;
569 * If the free space extent count drops below this number, convert the
570 * block group back to extents.
572 u32 bitmap_low_thresh
;
575 * It is just used for the delayed data space allocation because
576 * only the data space allocation and the relative metadata update
577 * can be done cross the transaction.
579 struct rw_semaphore data_rwsem
;
581 /* for raid56, this is a full stripe, without parity */
582 unsigned long full_stripe_len
;
586 unsigned int has_caching_ctl
:1;
587 unsigned int removed
:1;
589 int disk_cache_state
;
591 /* cache tracking stuff */
593 struct btrfs_caching_control
*caching_ctl
;
594 u64 last_byte_to_unpin
;
596 struct btrfs_space_info
*space_info
;
598 /* free space cache stuff */
599 struct btrfs_free_space_ctl
*free_space_ctl
;
601 /* block group cache stuff */
602 struct rb_node cache_node
;
604 /* for block groups in the same raid type */
605 struct list_head list
;
610 /* List of struct btrfs_free_clusters for this block group.
611 * Today it will only have one thing on it, but that may change
613 struct list_head cluster_list
;
615 /* For delayed block group creation or deletion of empty block groups */
616 struct list_head bg_list
;
618 /* For read-only block groups */
619 struct list_head ro_list
;
623 /* For dirty block groups */
624 struct list_head dirty_list
;
625 struct list_head io_list
;
627 struct btrfs_io_ctl io_ctl
;
630 * Incremented when doing extent allocations and holding a read lock
631 * on the space_info's groups_sem semaphore.
632 * Decremented when an ordered extent that represents an IO against this
633 * block group's range is created (after it's added to its inode's
634 * root's list of ordered extents) or immediately after the allocation
635 * if it's a metadata extent or fallocate extent (for these cases we
636 * don't create ordered extents).
638 atomic_t reservations
;
641 * Incremented while holding the spinlock *lock* by a task checking if
642 * it can perform a nocow write (incremented if the value for the *ro*
643 * field is 0). Decremented by such tasks once they create an ordered
644 * extent or before that if some error happens before reaching that step.
645 * This is to prevent races between block group relocation and nocow
646 * writes through direct IO.
648 atomic_t nocow_writers
;
650 /* Lock for free space tree operations. */
651 struct mutex free_space_lock
;
654 * Does the block group need to be added to the free space tree?
655 * Protected by free_space_lock.
657 int needs_free_space
;
659 /* Record locked full stripes for RAID5/6 block group */
660 struct btrfs_full_stripe_locks_tree full_stripe_locks_root
;
663 /* delayed seq elem */
665 struct list_head list
;
669 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
671 #define SEQ_LAST ((u64)-1)
673 enum btrfs_orphan_cleanup_state
{
674 ORPHAN_CLEANUP_STARTED
= 1,
675 ORPHAN_CLEANUP_DONE
= 2,
678 /* used by the raid56 code to lock stripes for read/modify/write */
679 struct btrfs_stripe_hash
{
680 struct list_head hash_list
;
681 wait_queue_head_t wait
;
685 /* used by the raid56 code to lock stripes for read/modify/write */
686 struct btrfs_stripe_hash_table
{
687 struct list_head stripe_cache
;
688 spinlock_t cache_lock
;
690 struct btrfs_stripe_hash table
[];
693 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
695 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
698 struct reloc_control
;
700 struct btrfs_fs_devices
;
701 struct btrfs_balance_control
;
702 struct btrfs_delayed_root
;
704 #define BTRFS_FS_BARRIER 1
705 #define BTRFS_FS_CLOSING_START 2
706 #define BTRFS_FS_CLOSING_DONE 3
707 #define BTRFS_FS_LOG_RECOVERING 4
708 #define BTRFS_FS_OPEN 5
709 #define BTRFS_FS_QUOTA_ENABLED 6
710 #define BTRFS_FS_QUOTA_ENABLING 7
711 #define BTRFS_FS_QUOTA_DISABLING 8
712 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
713 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
714 #define BTRFS_FS_BTREE_ERR 11
715 #define BTRFS_FS_LOG1_ERR 12
716 #define BTRFS_FS_LOG2_ERR 13
717 #define BTRFS_FS_QUOTA_OVERRIDE 14
718 /* Used to record internally whether fs has been frozen */
719 #define BTRFS_FS_FROZEN 15
722 * Indicate that a whole-filesystem exclusive operation is running
723 * (device replace, resize, device add/delete, balance)
725 #define BTRFS_FS_EXCL_OP 14
727 struct btrfs_fs_info
{
728 u8 fsid
[BTRFS_FSID_SIZE
];
729 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
731 struct btrfs_root
*extent_root
;
732 struct btrfs_root
*tree_root
;
733 struct btrfs_root
*chunk_root
;
734 struct btrfs_root
*dev_root
;
735 struct btrfs_root
*fs_root
;
736 struct btrfs_root
*csum_root
;
737 struct btrfs_root
*quota_root
;
738 struct btrfs_root
*uuid_root
;
739 struct btrfs_root
*free_space_root
;
741 /* the log root tree is a directory of all the other log roots */
742 struct btrfs_root
*log_root_tree
;
744 spinlock_t fs_roots_radix_lock
;
745 struct radix_tree_root fs_roots_radix
;
747 /* block group cache stuff */
748 spinlock_t block_group_cache_lock
;
749 u64 first_logical_byte
;
750 struct rb_root block_group_cache_tree
;
752 /* keep track of unallocated space */
753 atomic64_t free_chunk_space
;
755 struct extent_io_tree freed_extents
[2];
756 struct extent_io_tree
*pinned_extents
;
758 /* logical->physical extent mapping */
759 struct btrfs_mapping_tree mapping_tree
;
762 * block reservation for extent, checksum, root tree and
763 * delayed dir index item
765 struct btrfs_block_rsv global_block_rsv
;
766 /* block reservation for delay allocation */
767 struct btrfs_block_rsv delalloc_block_rsv
;
768 /* block reservation for metadata operations */
769 struct btrfs_block_rsv trans_block_rsv
;
770 /* block reservation for chunk tree */
771 struct btrfs_block_rsv chunk_block_rsv
;
772 /* block reservation for delayed operations */
773 struct btrfs_block_rsv delayed_block_rsv
;
775 struct btrfs_block_rsv empty_block_rsv
;
778 u64 last_trans_committed
;
779 u64 avg_delayed_ref_runtime
;
782 * this is updated to the current trans every time a full commit
783 * is required instead of the faster short fsync log commits
785 u64 last_trans_log_full_commit
;
786 unsigned long mount_opt
;
788 * Track requests for actions that need to be done during transaction
789 * commit (like for some mount options).
791 unsigned long pending_changes
;
792 unsigned long compress_type
:4;
795 * It is a suggestive number, the read side is safe even it gets a
796 * wrong number because we will write out the data into a regular
797 * extent. The write side(mount/remount) is under ->s_umount lock,
798 * so it is also safe.
802 struct btrfs_transaction
*running_transaction
;
803 wait_queue_head_t transaction_throttle
;
804 wait_queue_head_t transaction_wait
;
805 wait_queue_head_t transaction_blocked_wait
;
806 wait_queue_head_t async_submit_wait
;
809 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
810 * when they are updated.
812 * Because we do not clear the flags for ever, so we needn't use
813 * the lock on the read side.
815 * We also needn't use the lock when we mount the fs, because
816 * there is no other task which will update the flag.
818 spinlock_t super_lock
;
819 struct btrfs_super_block
*super_copy
;
820 struct btrfs_super_block
*super_for_commit
;
821 struct super_block
*sb
;
822 struct inode
*btree_inode
;
823 struct mutex tree_log_mutex
;
824 struct mutex transaction_kthread_mutex
;
825 struct mutex cleaner_mutex
;
826 struct mutex chunk_mutex
;
827 struct mutex volume_mutex
;
830 * this is taken to make sure we don't set block groups ro after
831 * the free space cache has been allocated on them
833 struct mutex ro_block_group_mutex
;
835 /* this is used during read/modify/write to make sure
836 * no two ios are trying to mod the same stripe at the same
839 struct btrfs_stripe_hash_table
*stripe_hash_table
;
842 * this protects the ordered operations list only while we are
843 * processing all of the entries on it. This way we make
844 * sure the commit code doesn't find the list temporarily empty
845 * because another function happens to be doing non-waiting preflush
846 * before jumping into the main commit.
848 struct mutex ordered_operations_mutex
;
850 struct rw_semaphore commit_root_sem
;
852 struct rw_semaphore cleanup_work_sem
;
854 struct rw_semaphore subvol_sem
;
855 struct srcu_struct subvol_srcu
;
857 spinlock_t trans_lock
;
859 * the reloc mutex goes with the trans lock, it is taken
860 * during commit to protect us from the relocation code
862 struct mutex reloc_mutex
;
864 struct list_head trans_list
;
865 struct list_head dead_roots
;
866 struct list_head caching_block_groups
;
868 spinlock_t delayed_iput_lock
;
869 struct list_head delayed_iputs
;
870 struct mutex cleaner_delayed_iput_mutex
;
872 /* this protects tree_mod_seq_list */
873 spinlock_t tree_mod_seq_lock
;
874 atomic64_t tree_mod_seq
;
875 struct list_head tree_mod_seq_list
;
877 /* this protects tree_mod_log */
878 rwlock_t tree_mod_log_lock
;
879 struct rb_root tree_mod_log
;
881 atomic_t nr_async_submits
;
882 atomic_t async_submit_draining
;
883 atomic_t nr_async_bios
;
884 atomic_t async_delalloc_pages
;
885 atomic_t open_ioctl_trans
;
888 * this is used to protect the following list -- ordered_roots.
890 spinlock_t ordered_root_lock
;
893 * all fs/file tree roots in which there are data=ordered extents
894 * pending writeback are added into this list.
896 * these can span multiple transactions and basically include
897 * every dirty data page that isn't from nodatacow
899 struct list_head ordered_roots
;
901 struct mutex delalloc_root_mutex
;
902 spinlock_t delalloc_root_lock
;
903 /* all fs/file tree roots that have delalloc inodes. */
904 struct list_head delalloc_roots
;
907 * there is a pool of worker threads for checksumming during writes
908 * and a pool for checksumming after reads. This is because readers
909 * can run with FS locks held, and the writers may be waiting for
910 * those locks. We don't want ordering in the pending list to cause
911 * deadlocks, and so the two are serviced separately.
913 * A third pool does submit_bio to avoid deadlocking with the other
916 struct btrfs_workqueue
*workers
;
917 struct btrfs_workqueue
*delalloc_workers
;
918 struct btrfs_workqueue
*flush_workers
;
919 struct btrfs_workqueue
*endio_workers
;
920 struct btrfs_workqueue
*endio_meta_workers
;
921 struct btrfs_workqueue
*endio_raid56_workers
;
922 struct btrfs_workqueue
*endio_repair_workers
;
923 struct btrfs_workqueue
*rmw_workers
;
924 struct btrfs_workqueue
*endio_meta_write_workers
;
925 struct btrfs_workqueue
*endio_write_workers
;
926 struct btrfs_workqueue
*endio_freespace_worker
;
927 struct btrfs_workqueue
*submit_workers
;
928 struct btrfs_workqueue
*caching_workers
;
929 struct btrfs_workqueue
*readahead_workers
;
932 * fixup workers take dirty pages that didn't properly go through
933 * the cow mechanism and make them safe to write. It happens
934 * for the sys_munmap function call path
936 struct btrfs_workqueue
*fixup_workers
;
937 struct btrfs_workqueue
*delayed_workers
;
939 /* the extent workers do delayed refs on the extent allocation tree */
940 struct btrfs_workqueue
*extent_workers
;
941 struct task_struct
*transaction_kthread
;
942 struct task_struct
*cleaner_kthread
;
943 int thread_pool_size
;
945 struct kobject
*space_info_kobj
;
949 /* used to keep from writing metadata until there is a nice batch */
950 struct percpu_counter dirty_metadata_bytes
;
951 struct percpu_counter delalloc_bytes
;
952 s32 dirty_metadata_batch
;
955 struct list_head dirty_cowonly_roots
;
957 struct btrfs_fs_devices
*fs_devices
;
960 * the space_info list is almost entirely read only. It only changes
961 * when we add a new raid type to the FS, and that happens
962 * very rarely. RCU is used to protect it.
964 struct list_head space_info
;
966 struct btrfs_space_info
*data_sinfo
;
968 struct reloc_control
*reloc_ctl
;
970 /* data_alloc_cluster is only used in ssd_spread mode */
971 struct btrfs_free_cluster data_alloc_cluster
;
973 /* all metadata allocations go through this cluster */
974 struct btrfs_free_cluster meta_alloc_cluster
;
976 /* auto defrag inodes go here */
977 spinlock_t defrag_inodes_lock
;
978 struct rb_root defrag_inodes
;
979 atomic_t defrag_running
;
981 /* Used to protect avail_{data, metadata, system}_alloc_bits */
982 seqlock_t profiles_lock
;
984 * these three are in extended format (availability of single
985 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
986 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
988 u64 avail_data_alloc_bits
;
989 u64 avail_metadata_alloc_bits
;
990 u64 avail_system_alloc_bits
;
992 /* restriper state */
993 spinlock_t balance_lock
;
994 struct mutex balance_mutex
;
995 atomic_t balance_running
;
996 atomic_t balance_pause_req
;
997 atomic_t balance_cancel_req
;
998 struct btrfs_balance_control
*balance_ctl
;
999 wait_queue_head_t balance_wait_q
;
1001 unsigned data_chunk_allocations
;
1002 unsigned metadata_ratio
;
1006 /* private scrub information */
1007 struct mutex scrub_lock
;
1008 atomic_t scrubs_running
;
1009 atomic_t scrub_pause_req
;
1010 atomic_t scrubs_paused
;
1011 atomic_t scrub_cancel_req
;
1012 wait_queue_head_t scrub_pause_wait
;
1013 int scrub_workers_refcnt
;
1014 struct btrfs_workqueue
*scrub_workers
;
1015 struct btrfs_workqueue
*scrub_wr_completion_workers
;
1016 struct btrfs_workqueue
*scrub_nocow_workers
;
1017 struct btrfs_workqueue
*scrub_parity_workers
;
1019 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1020 u32 check_integrity_print_mask
;
1022 /* is qgroup tracking in a consistent state? */
1025 /* holds configuration and tracking. Protected by qgroup_lock */
1026 struct rb_root qgroup_tree
;
1027 struct rb_root qgroup_op_tree
;
1028 spinlock_t qgroup_lock
;
1029 spinlock_t qgroup_op_lock
;
1030 atomic_t qgroup_op_seq
;
1033 * used to avoid frequently calling ulist_alloc()/ulist_free()
1034 * when doing qgroup accounting, it must be protected by qgroup_lock.
1036 struct ulist
*qgroup_ulist
;
1038 /* protect user change for quota operations */
1039 struct mutex qgroup_ioctl_lock
;
1041 /* list of dirty qgroups to be written at next commit */
1042 struct list_head dirty_qgroups
;
1044 /* used by qgroup for an efficient tree traversal */
1047 /* qgroup rescan items */
1048 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1049 struct btrfs_key qgroup_rescan_progress
;
1050 struct btrfs_workqueue
*qgroup_rescan_workers
;
1051 struct completion qgroup_rescan_completion
;
1052 struct btrfs_work qgroup_rescan_work
;
1053 bool qgroup_rescan_running
; /* protected by qgroup_rescan_lock */
1055 /* filesystem state */
1056 unsigned long fs_state
;
1058 struct btrfs_delayed_root
*delayed_root
;
1060 /* readahead tree */
1061 spinlock_t reada_lock
;
1062 struct radix_tree_root reada_tree
;
1064 /* readahead works cnt */
1065 atomic_t reada_works_cnt
;
1067 /* Extent buffer radix tree */
1068 spinlock_t buffer_lock
;
1069 struct radix_tree_root buffer_radix
;
1071 /* next backup root to be overwritten */
1072 int backup_root_index
;
1074 /* device replace state */
1075 struct btrfs_dev_replace dev_replace
;
1077 struct percpu_counter bio_counter
;
1078 wait_queue_head_t replace_wait
;
1080 struct semaphore uuid_tree_rescan_sem
;
1082 /* Used to reclaim the metadata space in the background. */
1083 struct work_struct async_reclaim_work
;
1085 spinlock_t unused_bgs_lock
;
1086 struct list_head unused_bgs
;
1087 struct mutex unused_bg_unpin_mutex
;
1088 struct mutex delete_unused_bgs_mutex
;
1090 /* For btrfs to record security options */
1091 struct security_mnt_opts security_opts
;
1094 * Chunks that can't be freed yet (under a trim/discard operation)
1095 * and will be latter freed. Protected by fs_info->chunk_mutex.
1097 struct list_head pinned_chunks
;
1099 /* Cached block sizes */
1105 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
1107 return sb
->s_fs_info
;
1110 struct btrfs_subvolume_writers
{
1111 struct percpu_counter counter
;
1112 wait_queue_head_t wait
;
1116 * The state of btrfs root
1119 * btrfs_record_root_in_trans is a multi-step process,
1120 * and it can race with the balancing code. But the
1121 * race is very small, and only the first time the root
1122 * is added to each transaction. So IN_TRANS_SETUP
1123 * is used to tell us when more checks are required
1125 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1126 #define BTRFS_ROOT_REF_COWS 1
1127 #define BTRFS_ROOT_TRACK_DIRTY 2
1128 #define BTRFS_ROOT_IN_RADIX 3
1129 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1130 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1131 #define BTRFS_ROOT_FORCE_COW 6
1132 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1133 #define BTRFS_ROOT_DIRTY 8
1136 * in ram representation of the tree. extent_root is used for all allocations
1137 * and for the extent tree extent_root root.
1140 struct extent_buffer
*node
;
1142 struct extent_buffer
*commit_root
;
1143 struct btrfs_root
*log_root
;
1144 struct btrfs_root
*reloc_root
;
1146 unsigned long state
;
1147 struct btrfs_root_item root_item
;
1148 struct btrfs_key root_key
;
1149 struct btrfs_fs_info
*fs_info
;
1150 struct extent_io_tree dirty_log_pages
;
1152 struct mutex objectid_mutex
;
1154 spinlock_t accounting_lock
;
1155 struct btrfs_block_rsv
*block_rsv
;
1157 /* free ino cache stuff */
1158 struct btrfs_free_space_ctl
*free_ino_ctl
;
1159 enum btrfs_caching_type ino_cache_state
;
1160 spinlock_t ino_cache_lock
;
1161 wait_queue_head_t ino_cache_wait
;
1162 struct btrfs_free_space_ctl
*free_ino_pinned
;
1163 u64 ino_cache_progress
;
1164 struct inode
*ino_cache_inode
;
1166 struct mutex log_mutex
;
1167 wait_queue_head_t log_writer_wait
;
1168 wait_queue_head_t log_commit_wait
[2];
1169 struct list_head log_ctxs
[2];
1170 atomic_t log_writers
;
1171 atomic_t log_commit
[2];
1174 /* No matter the commit succeeds or not*/
1175 int log_transid_committed
;
1176 /* Just be updated when the commit succeeds. */
1177 int last_log_commit
;
1178 pid_t log_start_pid
;
1185 u64 highest_objectid
;
1187 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1188 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1192 u64 defrag_trans_start
;
1193 struct btrfs_key defrag_progress
;
1194 struct btrfs_key defrag_max
;
1197 /* the dirty list is only used by non-reference counted roots */
1198 struct list_head dirty_list
;
1200 struct list_head root_list
;
1202 spinlock_t log_extents_lock
[2];
1203 struct list_head logged_list
[2];
1205 spinlock_t orphan_lock
;
1206 atomic_t orphan_inodes
;
1207 struct btrfs_block_rsv
*orphan_block_rsv
;
1208 int orphan_cleanup_state
;
1210 spinlock_t inode_lock
;
1211 /* red-black tree that keeps track of in-memory inodes */
1212 struct rb_root inode_tree
;
1215 * radix tree that keeps track of delayed nodes of every inode,
1216 * protected by inode_lock
1218 struct radix_tree_root delayed_nodes_tree
;
1220 * right now this just gets used so that a root has its own devid
1221 * for stat. It may be used for more later
1225 spinlock_t root_item_lock
;
1228 struct mutex delalloc_mutex
;
1229 spinlock_t delalloc_lock
;
1231 * all of the inodes that have delalloc bytes. It is possible for
1232 * this list to be empty even when there is still dirty data=ordered
1233 * extents waiting to finish IO.
1235 struct list_head delalloc_inodes
;
1236 struct list_head delalloc_root
;
1237 u64 nr_delalloc_inodes
;
1239 struct mutex ordered_extent_mutex
;
1241 * this is used by the balancing code to wait for all the pending
1244 spinlock_t ordered_extent_lock
;
1247 * all of the data=ordered extents pending writeback
1248 * these can span multiple transactions and basically include
1249 * every dirty data page that isn't from nodatacow
1251 struct list_head ordered_extents
;
1252 struct list_head ordered_root
;
1253 u64 nr_ordered_extents
;
1256 * Number of currently running SEND ioctls to prevent
1257 * manipulation with the read-only status via SUBVOL_SETFLAGS
1259 int send_in_progress
;
1260 struct btrfs_subvolume_writers
*subv_writers
;
1261 atomic_t will_be_snapshotted
;
1263 /* For qgroup metadata space reserve */
1264 atomic64_t qgroup_meta_rsv
;
1267 struct btrfs_file_private
{
1268 struct btrfs_trans_handle
*trans
;
1272 static inline u32
btrfs_inode_sectorsize(const struct inode
*inode
)
1274 return btrfs_sb(inode
->i_sb
)->sectorsize
;
1277 static inline u32
BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info
*info
)
1280 return info
->nodesize
- sizeof(struct btrfs_header
);
1283 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1285 static inline u32
BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info
*info
)
1287 return BTRFS_LEAF_DATA_SIZE(info
) - sizeof(struct btrfs_item
);
1290 static inline u32
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info
*info
)
1292 return BTRFS_LEAF_DATA_SIZE(info
) / sizeof(struct btrfs_key_ptr
);
1295 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1296 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1297 static inline u32
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info
*info
)
1299 return BTRFS_MAX_ITEM_SIZE(info
) -
1300 BTRFS_FILE_EXTENT_INLINE_DATA_START
;
1303 static inline u32
BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info
*info
)
1305 return BTRFS_MAX_ITEM_SIZE(info
) - sizeof(struct btrfs_dir_item
);
1309 * Flags for mount options.
1311 * Note: don't forget to add new options to btrfs_show_options()
1313 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1314 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1315 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1316 #define BTRFS_MOUNT_SSD (1 << 3)
1317 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1318 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1319 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1320 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1321 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1322 #define BTRFS_MOUNT_NOSSD (1 << 9)
1323 #define BTRFS_MOUNT_DISCARD (1 << 10)
1324 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1325 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1326 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1327 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1328 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1329 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1330 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1331 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1332 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1333 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1334 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1335 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1336 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1337 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1338 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1339 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1340 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1342 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1343 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1345 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1346 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1347 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1348 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1351 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1353 if (!btrfs_test_opt(fs_info, opt)) \
1354 btrfs_info(fs_info, fmt, ##args); \
1355 btrfs_set_opt(fs_info->mount_opt, opt); \
1358 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1360 if (btrfs_test_opt(fs_info, opt)) \
1361 btrfs_info(fs_info, fmt, ##args); \
1362 btrfs_clear_opt(fs_info->mount_opt, opt); \
1365 #ifdef CONFIG_BTRFS_DEBUG
1367 btrfs_should_fragment_free_space(struct btrfs_block_group_cache
*block_group
)
1369 struct btrfs_fs_info
*fs_info
= block_group
->fs_info
;
1371 return (btrfs_test_opt(fs_info
, FRAGMENT_METADATA
) &&
1372 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1373 (btrfs_test_opt(fs_info
, FRAGMENT_DATA
) &&
1374 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1379 * Requests for changes that need to be done during transaction commit.
1381 * Internal mount options that are used for special handling of the real
1382 * mount options (eg. cannot be set during remount and have to be set during
1383 * transaction commit)
1386 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1387 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1388 #define BTRFS_PENDING_COMMIT (2)
1390 #define btrfs_test_pending(info, opt) \
1391 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1392 #define btrfs_set_pending(info, opt) \
1393 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1394 #define btrfs_clear_pending(info, opt) \
1395 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1398 * Helpers for setting pending mount option changes.
1400 * Expects corresponding macros
1401 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1403 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1405 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1406 btrfs_info((info), fmt, ##args); \
1407 btrfs_set_pending((info), SET_##opt); \
1408 btrfs_clear_pending((info), CLEAR_##opt); \
1412 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1414 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1415 btrfs_info((info), fmt, ##args); \
1416 btrfs_set_pending((info), CLEAR_##opt); \
1417 btrfs_clear_pending((info), SET_##opt); \
1424 #define BTRFS_INODE_NODATASUM (1 << 0)
1425 #define BTRFS_INODE_NODATACOW (1 << 1)
1426 #define BTRFS_INODE_READONLY (1 << 2)
1427 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1428 #define BTRFS_INODE_PREALLOC (1 << 4)
1429 #define BTRFS_INODE_SYNC (1 << 5)
1430 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1431 #define BTRFS_INODE_APPEND (1 << 7)
1432 #define BTRFS_INODE_NODUMP (1 << 8)
1433 #define BTRFS_INODE_NOATIME (1 << 9)
1434 #define BTRFS_INODE_DIRSYNC (1 << 10)
1435 #define BTRFS_INODE_COMPRESS (1 << 11)
1437 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1439 struct btrfs_map_token
{
1440 const struct extent_buffer
*eb
;
1442 unsigned long offset
;
1445 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1446 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1448 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1450 token
->kaddr
= NULL
;
1453 /* some macros to generate set/get functions for the struct fields. This
1454 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1457 #define le8_to_cpu(v) (v)
1458 #define cpu_to_le8(v) (v)
1461 #define read_eb_member(eb, ptr, type, member, result) (\
1462 read_extent_buffer(eb, (char *)(result), \
1463 ((unsigned long)(ptr)) + \
1464 offsetof(type, member), \
1465 sizeof(((type *)0)->member)))
1467 #define write_eb_member(eb, ptr, type, member, result) (\
1468 write_extent_buffer(eb, (char *)(result), \
1469 ((unsigned long)(ptr)) + \
1470 offsetof(type, member), \
1471 sizeof(((type *)0)->member)))
1473 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1474 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1475 const void *ptr, unsigned long off, \
1476 struct btrfs_map_token *token); \
1477 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1478 unsigned long off, u##bits val, \
1479 struct btrfs_map_token *token); \
1480 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1482 unsigned long off) \
1484 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1486 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1487 unsigned long off, u##bits val) \
1489 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1492 DECLARE_BTRFS_SETGET_BITS(8)
1493 DECLARE_BTRFS_SETGET_BITS(16)
1494 DECLARE_BTRFS_SETGET_BITS(32)
1495 DECLARE_BTRFS_SETGET_BITS(64)
1497 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1498 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1501 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1502 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1504 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1507 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1508 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1510 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1512 struct btrfs_map_token *token) \
1514 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1515 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1517 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1518 type *s, u##bits val, \
1519 struct btrfs_map_token *token) \
1521 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1522 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1525 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1526 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1528 const type *p = page_address(eb->pages[0]); \
1529 u##bits res = le##bits##_to_cpu(p->member); \
1532 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1535 type *p = page_address(eb->pages[0]); \
1536 p->member = cpu_to_le##bits(val); \
1539 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1540 static inline u##bits btrfs_##name(const type *s) \
1542 return le##bits##_to_cpu(s->member); \
1544 static inline void btrfs_set_##name(type *s, u##bits val) \
1546 s->member = cpu_to_le##bits(val); \
1550 static inline u64
btrfs_device_total_bytes(struct extent_buffer
*eb
,
1551 struct btrfs_dev_item
*s
)
1553 BUILD_BUG_ON(sizeof(u64
) !=
1554 sizeof(((struct btrfs_dev_item
*)0))->total_bytes
);
1555 return btrfs_get_64(eb
, s
, offsetof(struct btrfs_dev_item
,
1558 static inline void btrfs_set_device_total_bytes(struct extent_buffer
*eb
,
1559 struct btrfs_dev_item
*s
,
1562 BUILD_BUG_ON(sizeof(u64
) !=
1563 sizeof(((struct btrfs_dev_item
*)0))->total_bytes
);
1564 WARN_ON(!IS_ALIGNED(val
, eb
->fs_info
->sectorsize
));
1565 btrfs_set_64(eb
, s
, offsetof(struct btrfs_dev_item
, total_bytes
), val
);
1569 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1570 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1571 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1572 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1573 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1575 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1576 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1577 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1578 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1579 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1580 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1582 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1583 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1585 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1587 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1589 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1591 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1593 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1594 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1596 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1598 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1600 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1603 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1605 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1608 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1610 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1613 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1614 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1615 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1616 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1617 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1618 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1619 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1620 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1621 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1622 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1623 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1625 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1627 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1630 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1631 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1632 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1634 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1636 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1638 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1640 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1641 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1643 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1645 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1646 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1648 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1651 unsigned long offset
= (unsigned long)c
;
1652 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1653 offset
+= nr
* sizeof(struct btrfs_stripe
);
1654 return (struct btrfs_stripe
*)offset
;
1657 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1659 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1662 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1663 struct btrfs_chunk
*c
, int nr
)
1665 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1668 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1669 struct btrfs_chunk
*c
, int nr
)
1671 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1674 /* struct btrfs_block_group_item */
1675 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1677 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1679 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1680 struct btrfs_block_group_item
, chunk_objectid
, 64);
1682 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1683 struct btrfs_block_group_item
, chunk_objectid
, 64);
1684 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1685 struct btrfs_block_group_item
, flags
, 64);
1686 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1687 struct btrfs_block_group_item
, flags
, 64);
1689 /* struct btrfs_free_space_info */
1690 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1692 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1694 /* struct btrfs_inode_ref */
1695 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1696 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1698 /* struct btrfs_inode_extref */
1699 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1700 parent_objectid
, 64);
1701 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1703 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1705 /* struct btrfs_inode_item */
1706 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1707 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1708 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1709 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1710 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1711 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1712 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1713 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1714 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1715 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1716 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1717 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1718 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1720 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1722 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1724 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1725 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1727 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1729 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1730 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1731 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1732 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1733 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1734 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1735 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1736 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1737 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1738 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1740 /* struct btrfs_dev_extent */
1741 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1743 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1744 chunk_objectid
, 64);
1745 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1747 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1749 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1751 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1752 return (unsigned long)dev
+ ptr
;
1755 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1756 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1758 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1760 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1763 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1765 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1766 struct btrfs_tree_block_info
*item
,
1767 struct btrfs_disk_key
*key
)
1769 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1772 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1773 struct btrfs_tree_block_info
*item
,
1774 struct btrfs_disk_key
*key
)
1776 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1779 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1781 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1783 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1785 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1788 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1791 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1793 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1796 static inline u32
btrfs_extent_inline_ref_size(int type
)
1798 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1799 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1800 return sizeof(struct btrfs_extent_inline_ref
);
1801 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1802 return sizeof(struct btrfs_shared_data_ref
) +
1803 sizeof(struct btrfs_extent_inline_ref
);
1804 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1805 return sizeof(struct btrfs_extent_data_ref
) +
1806 offsetof(struct btrfs_extent_inline_ref
, offset
);
1810 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1811 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1813 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1814 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1816 /* struct btrfs_node */
1817 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1818 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1819 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1821 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1824 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1827 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1828 sizeof(struct btrfs_key_ptr
) * nr
;
1829 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1832 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1836 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1837 sizeof(struct btrfs_key_ptr
) * nr
;
1838 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1841 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1844 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1845 sizeof(struct btrfs_key_ptr
) * nr
;
1846 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1849 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1853 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1854 sizeof(struct btrfs_key_ptr
) * nr
;
1855 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1858 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1860 return offsetof(struct btrfs_node
, ptrs
) +
1861 sizeof(struct btrfs_key_ptr
) * nr
;
1864 void btrfs_node_key(const struct extent_buffer
*eb
,
1865 struct btrfs_disk_key
*disk_key
, int nr
);
1867 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1868 struct btrfs_disk_key
*disk_key
, int nr
)
1871 ptr
= btrfs_node_key_ptr_offset(nr
);
1872 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1873 struct btrfs_key_ptr
, key
, disk_key
);
1876 /* struct btrfs_item */
1877 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1878 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1879 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1880 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1882 static inline unsigned long btrfs_item_nr_offset(int nr
)
1884 return offsetof(struct btrfs_leaf
, items
) +
1885 sizeof(struct btrfs_item
) * nr
;
1888 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1890 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1893 static inline u32
btrfs_item_end(const struct extent_buffer
*eb
,
1894 struct btrfs_item
*item
)
1896 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1899 static inline u32
btrfs_item_end_nr(const struct extent_buffer
*eb
, int nr
)
1901 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1904 static inline u32
btrfs_item_offset_nr(const struct extent_buffer
*eb
, int nr
)
1906 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1909 static inline u32
btrfs_item_size_nr(const struct extent_buffer
*eb
, int nr
)
1911 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1914 static inline void btrfs_item_key(const struct extent_buffer
*eb
,
1915 struct btrfs_disk_key
*disk_key
, int nr
)
1917 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1918 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1921 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1922 struct btrfs_disk_key
*disk_key
, int nr
)
1924 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1925 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1928 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1931 * struct btrfs_root_ref
1933 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1934 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1935 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1937 /* struct btrfs_dir_item */
1938 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1939 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1940 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1941 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1942 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1943 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1945 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1947 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1950 static inline void btrfs_dir_item_key(const struct extent_buffer
*eb
,
1951 const struct btrfs_dir_item
*item
,
1952 struct btrfs_disk_key
*key
)
1954 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1957 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1958 struct btrfs_dir_item
*item
,
1959 const struct btrfs_disk_key
*key
)
1961 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1964 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1966 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1968 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1971 static inline void btrfs_free_space_key(const struct extent_buffer
*eb
,
1972 const struct btrfs_free_space_header
*h
,
1973 struct btrfs_disk_key
*key
)
1975 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1978 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1979 struct btrfs_free_space_header
*h
,
1980 const struct btrfs_disk_key
*key
)
1982 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1985 /* struct btrfs_disk_key */
1986 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1988 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1989 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1991 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1992 const struct btrfs_disk_key
*disk
)
1994 cpu
->offset
= le64_to_cpu(disk
->offset
);
1995 cpu
->type
= disk
->type
;
1996 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1999 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2000 const struct btrfs_key
*cpu
)
2002 disk
->offset
= cpu_to_le64(cpu
->offset
);
2003 disk
->type
= cpu
->type
;
2004 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2007 static inline void btrfs_node_key_to_cpu(const struct extent_buffer
*eb
,
2008 struct btrfs_key
*key
, int nr
)
2010 struct btrfs_disk_key disk_key
;
2011 btrfs_node_key(eb
, &disk_key
, nr
);
2012 btrfs_disk_key_to_cpu(key
, &disk_key
);
2015 static inline void btrfs_item_key_to_cpu(const struct extent_buffer
*eb
,
2016 struct btrfs_key
*key
, int nr
)
2018 struct btrfs_disk_key disk_key
;
2019 btrfs_item_key(eb
, &disk_key
, nr
);
2020 btrfs_disk_key_to_cpu(key
, &disk_key
);
2023 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer
*eb
,
2024 const struct btrfs_dir_item
*item
,
2025 struct btrfs_key
*key
)
2027 struct btrfs_disk_key disk_key
;
2028 btrfs_dir_item_key(eb
, item
, &disk_key
);
2029 btrfs_disk_key_to_cpu(key
, &disk_key
);
2032 static inline u8
btrfs_key_type(const struct btrfs_key
*key
)
2037 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2042 /* struct btrfs_header */
2043 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2044 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2046 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2047 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2048 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2049 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2050 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2052 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2053 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2055 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2057 static inline int btrfs_header_flag(const struct extent_buffer
*eb
, u64 flag
)
2059 return (btrfs_header_flags(eb
) & flag
) == flag
;
2062 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2064 u64 flags
= btrfs_header_flags(eb
);
2065 btrfs_set_header_flags(eb
, flags
| flag
);
2066 return (flags
& flag
) == flag
;
2069 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2071 u64 flags
= btrfs_header_flags(eb
);
2072 btrfs_set_header_flags(eb
, flags
& ~flag
);
2073 return (flags
& flag
) == flag
;
2076 static inline int btrfs_header_backref_rev(const struct extent_buffer
*eb
)
2078 u64 flags
= btrfs_header_flags(eb
);
2079 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2082 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2085 u64 flags
= btrfs_header_flags(eb
);
2086 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2087 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2088 btrfs_set_header_flags(eb
, flags
);
2091 static inline unsigned long btrfs_header_fsid(void)
2093 return offsetof(struct btrfs_header
, fsid
);
2096 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer
*eb
)
2098 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2101 static inline int btrfs_is_leaf(const struct extent_buffer
*eb
)
2103 return btrfs_header_level(eb
) == 0;
2106 /* struct btrfs_root_item */
2107 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2109 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2110 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2111 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2113 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2115 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2116 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2117 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2118 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2119 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2120 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2121 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2122 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2124 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2126 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2128 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2130 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2132 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2135 static inline bool btrfs_root_readonly(const struct btrfs_root
*root
)
2137 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2140 static inline bool btrfs_root_dead(const struct btrfs_root
*root
)
2142 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2145 /* struct btrfs_root_backup */
2146 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2148 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2150 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2151 tree_root_level
, 8);
2153 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2155 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2156 chunk_root_gen
, 64);
2157 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2158 chunk_root_level
, 8);
2160 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2162 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2163 extent_root_gen
, 64);
2164 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2165 extent_root_level
, 8);
2167 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2169 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2171 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2174 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2176 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2178 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2181 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2183 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2185 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2186 csum_root_level
, 8);
2187 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2189 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2191 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2194 /* struct btrfs_balance_item */
2195 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2197 static inline void btrfs_balance_data(const struct extent_buffer
*eb
,
2198 const struct btrfs_balance_item
*bi
,
2199 struct btrfs_disk_balance_args
*ba
)
2201 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2204 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2205 struct btrfs_balance_item
*bi
,
2206 const struct btrfs_disk_balance_args
*ba
)
2208 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2211 static inline void btrfs_balance_meta(const struct extent_buffer
*eb
,
2212 const struct btrfs_balance_item
*bi
,
2213 struct btrfs_disk_balance_args
*ba
)
2215 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2218 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2219 struct btrfs_balance_item
*bi
,
2220 const struct btrfs_disk_balance_args
*ba
)
2222 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2225 static inline void btrfs_balance_sys(const struct extent_buffer
*eb
,
2226 const struct btrfs_balance_item
*bi
,
2227 struct btrfs_disk_balance_args
*ba
)
2229 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2232 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2233 struct btrfs_balance_item
*bi
,
2234 const struct btrfs_disk_balance_args
*ba
)
2236 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2240 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2241 const struct btrfs_disk_balance_args
*disk
)
2243 memset(cpu
, 0, sizeof(*cpu
));
2245 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2246 cpu
->usage
= le64_to_cpu(disk
->usage
);
2247 cpu
->devid
= le64_to_cpu(disk
->devid
);
2248 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2249 cpu
->pend
= le64_to_cpu(disk
->pend
);
2250 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2251 cpu
->vend
= le64_to_cpu(disk
->vend
);
2252 cpu
->target
= le64_to_cpu(disk
->target
);
2253 cpu
->flags
= le64_to_cpu(disk
->flags
);
2254 cpu
->limit
= le64_to_cpu(disk
->limit
);
2255 cpu
->stripes_min
= le32_to_cpu(disk
->stripes_min
);
2256 cpu
->stripes_max
= le32_to_cpu(disk
->stripes_max
);
2260 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2261 const struct btrfs_balance_args
*cpu
)
2263 memset(disk
, 0, sizeof(*disk
));
2265 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2266 disk
->usage
= cpu_to_le64(cpu
->usage
);
2267 disk
->devid
= cpu_to_le64(cpu
->devid
);
2268 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2269 disk
->pend
= cpu_to_le64(cpu
->pend
);
2270 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2271 disk
->vend
= cpu_to_le64(cpu
->vend
);
2272 disk
->target
= cpu_to_le64(cpu
->target
);
2273 disk
->flags
= cpu_to_le64(cpu
->flags
);
2274 disk
->limit
= cpu_to_le64(cpu
->limit
);
2275 disk
->stripes_min
= cpu_to_le32(cpu
->stripes_min
);
2276 disk
->stripes_max
= cpu_to_le32(cpu
->stripes_max
);
2279 /* struct btrfs_super_block */
2280 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2281 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2282 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2284 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2285 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2286 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2287 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2288 struct btrfs_super_block
, chunk_root_generation
, 64);
2289 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2291 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2293 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2294 chunk_root_level
, 8);
2295 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2297 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2298 log_root_transid
, 64);
2299 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2301 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2303 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2305 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2307 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2309 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2311 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2312 root_dir_objectid
, 64);
2313 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2315 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2317 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2318 compat_ro_flags
, 64);
2319 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2320 incompat_flags
, 64);
2321 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2323 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2324 cache_generation
, 64);
2325 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2326 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2327 uuid_tree_generation
, 64);
2329 static inline int btrfs_super_csum_size(const struct btrfs_super_block
*s
)
2331 u16 t
= btrfs_super_csum_type(s
);
2333 * csum type is validated at mount time
2335 return btrfs_csum_sizes
[t
];
2340 * The leaf data grows from end-to-front in the node.
2341 * this returns the address of the start of the last item,
2342 * which is the stop of the leaf data stack
2344 static inline unsigned int leaf_data_end(const struct btrfs_fs_info
*fs_info
,
2345 const struct extent_buffer
*leaf
)
2347 u32 nr
= btrfs_header_nritems(leaf
);
2350 return BTRFS_LEAF_DATA_SIZE(fs_info
);
2351 return btrfs_item_offset_nr(leaf
, nr
- 1);
2354 /* struct btrfs_file_extent_item */
2355 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2356 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2357 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2358 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2359 struct btrfs_file_extent_item
, offset
, 64);
2360 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2361 struct btrfs_file_extent_item
, generation
, 64);
2362 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2363 struct btrfs_file_extent_item
, num_bytes
, 64);
2364 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2365 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2366 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2367 struct btrfs_file_extent_item
, compression
, 8);
2369 static inline unsigned long
2370 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item
*e
)
2372 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2375 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2377 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2380 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2382 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2384 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2385 disk_num_bytes
, 64);
2386 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2388 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2390 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2392 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2394 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2396 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2397 other_encoding
, 16);
2400 * this returns the number of bytes used by the item on disk, minus the
2401 * size of any extent headers. If a file is compressed on disk, this is
2402 * the compressed size
2404 static inline u32
btrfs_file_extent_inline_item_len(
2405 const struct extent_buffer
*eb
,
2406 struct btrfs_item
*e
)
2408 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2411 /* this returns the number of file bytes represented by the inline item.
2412 * If an item is compressed, this is the uncompressed size
2414 static inline u32
btrfs_file_extent_inline_len(const struct extent_buffer
*eb
,
2416 const struct btrfs_file_extent_item
*fi
)
2418 struct btrfs_map_token token
;
2420 btrfs_init_map_token(&token
);
2422 * return the space used on disk if this item isn't
2423 * compressed or encoded
2425 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
2426 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
2427 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
2428 return btrfs_file_extent_inline_item_len(eb
,
2429 btrfs_item_nr(slot
));
2432 /* otherwise use the ram bytes field */
2433 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
2437 /* btrfs_dev_stats_item */
2438 static inline u64
btrfs_dev_stats_value(const struct extent_buffer
*eb
,
2439 const struct btrfs_dev_stats_item
*ptr
,
2444 read_extent_buffer(eb
, &val
,
2445 offsetof(struct btrfs_dev_stats_item
, values
) +
2446 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2451 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2452 struct btrfs_dev_stats_item
*ptr
,
2455 write_extent_buffer(eb
, &val
,
2456 offsetof(struct btrfs_dev_stats_item
, values
) +
2457 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2461 /* btrfs_qgroup_status_item */
2462 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2464 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2466 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2468 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2471 /* btrfs_qgroup_info_item */
2472 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2474 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2475 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2477 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2478 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2481 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2482 struct btrfs_qgroup_info_item
, generation
, 64);
2483 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2485 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2486 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2487 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2489 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2490 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2492 /* btrfs_qgroup_limit_item */
2493 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2495 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2497 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2499 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2501 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2504 /* btrfs_dev_replace_item */
2505 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2506 struct btrfs_dev_replace_item
, src_devid
, 64);
2507 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2508 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2510 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2512 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2514 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2516 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2517 num_write_errors
, 64);
2518 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2519 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2521 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2523 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2527 struct btrfs_dev_replace_item
, src_devid
, 64);
2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2529 struct btrfs_dev_replace_item
,
2530 cont_reading_from_srcdev_mode
, 64);
2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2532 struct btrfs_dev_replace_item
, replace_state
, 64);
2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2534 struct btrfs_dev_replace_item
, time_started
, 64);
2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2536 struct btrfs_dev_replace_item
, time_stopped
, 64);
2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2538 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2540 struct btrfs_dev_replace_item
,
2541 num_uncorrectable_read_errors
, 64);
2542 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2543 struct btrfs_dev_replace_item
, cursor_left
, 64);
2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2545 struct btrfs_dev_replace_item
, cursor_right
, 64);
2547 /* helper function to cast into the data area of the leaf. */
2548 #define btrfs_item_ptr(leaf, slot, type) \
2549 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2550 btrfs_item_offset_nr(leaf, slot)))
2552 #define btrfs_item_ptr_offset(leaf, slot) \
2553 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2554 btrfs_item_offset_nr(leaf, slot)))
2556 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2558 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2559 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2562 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2564 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2569 enum btrfs_inline_ref_type
{
2570 BTRFS_REF_TYPE_INVALID
= 0,
2571 BTRFS_REF_TYPE_BLOCK
= 1,
2572 BTRFS_REF_TYPE_DATA
= 2,
2573 BTRFS_REF_TYPE_ANY
= 3,
2576 int btrfs_get_extent_inline_ref_type(const struct extent_buffer
*eb
,
2577 struct btrfs_extent_inline_ref
*iref
,
2578 enum btrfs_inline_ref_type is_data
);
2580 u64
btrfs_csum_bytes_to_leaves(struct btrfs_fs_info
*fs_info
, u64 csum_bytes
);
2582 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_fs_info
*fs_info
,
2585 return (u64
)fs_info
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2589 * Doing a truncate won't result in new nodes or leaves, just what we need for
2592 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_fs_info
*fs_info
,
2595 return (u64
)fs_info
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2598 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
2599 struct btrfs_fs_info
*fs_info
);
2600 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
2601 struct btrfs_fs_info
*fs_info
);
2602 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2604 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2605 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2606 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2607 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2608 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2609 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2610 struct btrfs_fs_info
*fs_info
, unsigned long count
);
2611 int btrfs_async_run_delayed_refs(struct btrfs_fs_info
*fs_info
,
2612 unsigned long count
, u64 transid
, int wait
);
2613 int btrfs_lookup_data_extent(struct btrfs_fs_info
*fs_info
, u64 start
, u64 len
);
2614 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2615 struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2616 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2617 int btrfs_pin_extent(struct btrfs_fs_info
*fs_info
,
2618 u64 bytenr
, u64 num
, int reserved
);
2619 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info
*fs_info
,
2620 u64 bytenr
, u64 num_bytes
);
2621 int btrfs_exclude_logged_extents(struct btrfs_fs_info
*fs_info
,
2622 struct extent_buffer
*eb
);
2623 int btrfs_cross_ref_exist(struct btrfs_root
*root
,
2624 u64 objectid
, u64 offset
, u64 bytenr
);
2625 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2626 struct btrfs_fs_info
*info
,
2628 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2629 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2630 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
2631 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2632 struct btrfs_root
*root
,
2633 u64 parent
, u64 root_objectid
,
2634 const struct btrfs_disk_key
*key
,
2635 int level
, u64 hint
,
2637 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2638 struct btrfs_root
*root
,
2639 struct extent_buffer
*buf
,
2640 u64 parent
, int last_ref
);
2641 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2642 u64 root_objectid
, u64 owner
,
2643 u64 offset
, u64 ram_bytes
,
2644 struct btrfs_key
*ins
);
2645 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2646 struct btrfs_fs_info
*fs_info
,
2647 u64 root_objectid
, u64 owner
, u64 offset
,
2648 struct btrfs_key
*ins
);
2649 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 ram_bytes
, u64 num_bytes
,
2650 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2651 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2652 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2653 struct extent_buffer
*buf
, int full_backref
);
2654 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2655 struct extent_buffer
*buf
, int full_backref
);
2656 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2657 struct btrfs_fs_info
*fs_info
,
2658 u64 bytenr
, u64 num_bytes
, u64 flags
,
2659 int level
, int is_data
);
2660 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2661 struct btrfs_fs_info
*fs_info
,
2662 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2663 u64 owner
, u64 offset
);
2665 int btrfs_free_reserved_extent(struct btrfs_fs_info
*fs_info
,
2666 u64 start
, u64 len
, int delalloc
);
2667 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info
*fs_info
,
2668 u64 start
, u64 len
);
2669 void btrfs_prepare_extent_commit(struct btrfs_fs_info
*fs_info
);
2670 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2671 struct btrfs_fs_info
*fs_info
);
2672 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2673 struct btrfs_fs_info
*fs_info
,
2674 u64 bytenr
, u64 num_bytes
, u64 parent
,
2675 u64 root_objectid
, u64 owner
, u64 offset
);
2677 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2678 struct btrfs_fs_info
*fs_info
);
2679 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2680 struct btrfs_fs_info
*fs_info
);
2681 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2682 struct btrfs_fs_info
*fs_info
);
2683 int btrfs_extent_readonly(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2684 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2685 int btrfs_read_block_groups(struct btrfs_fs_info
*info
);
2686 int btrfs_can_relocate(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2687 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2688 struct btrfs_fs_info
*fs_info
, u64 bytes_used
,
2689 u64 type
, u64 chunk_offset
, u64 size
);
2690 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2691 struct btrfs_fs_info
*fs_info
,
2692 const u64 chunk_offset
);
2693 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2694 struct btrfs_fs_info
*fs_info
, u64 group_start
,
2695 struct extent_map
*em
);
2696 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2697 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2698 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2699 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
2700 struct btrfs_fs_info
*fs_info
);
2701 u64
btrfs_data_alloc_profile(struct btrfs_fs_info
*fs_info
);
2702 u64
btrfs_metadata_alloc_profile(struct btrfs_fs_info
*fs_info
);
2703 u64
btrfs_system_alloc_profile(struct btrfs_fs_info
*fs_info
);
2704 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2706 enum btrfs_reserve_flush_enum
{
2707 /* If we are in the transaction, we can't flush anything.*/
2708 BTRFS_RESERVE_NO_FLUSH
,
2710 * Flushing delalloc may cause deadlock somewhere, in this
2711 * case, use FLUSH LIMIT
2713 BTRFS_RESERVE_FLUSH_LIMIT
,
2714 BTRFS_RESERVE_FLUSH_ALL
,
2717 enum btrfs_flush_state
{
2718 FLUSH_DELAYED_ITEMS_NR
= 1,
2719 FLUSH_DELAYED_ITEMS
= 2,
2721 FLUSH_DELALLOC_WAIT
= 4,
2726 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode
*inode
, u64 bytes
);
2727 int btrfs_check_data_free_space(struct inode
*inode
,
2728 struct extent_changeset
**reserved
, u64 start
, u64 len
);
2729 void btrfs_free_reserved_data_space(struct inode
*inode
,
2730 struct extent_changeset
*reserved
, u64 start
, u64 len
);
2731 void btrfs_delalloc_release_space(struct inode
*inode
,
2732 struct extent_changeset
*reserved
, u64 start
, u64 len
);
2733 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2735 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2736 struct btrfs_fs_info
*fs_info
);
2737 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2738 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2739 struct btrfs_inode
*inode
);
2740 void btrfs_orphan_release_metadata(struct btrfs_inode
*inode
);
2741 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2742 struct btrfs_block_rsv
*rsv
,
2744 u64
*qgroup_reserved
, bool use_global_rsv
);
2745 void btrfs_subvolume_release_metadata(struct btrfs_fs_info
*fs_info
,
2746 struct btrfs_block_rsv
*rsv
);
2747 int btrfs_delalloc_reserve_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2748 void btrfs_delalloc_release_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2749 int btrfs_delalloc_reserve_space(struct inode
*inode
,
2750 struct extent_changeset
**reserved
, u64 start
, u64 len
);
2751 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2752 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_fs_info
*fs_info
,
2753 unsigned short type
);
2754 void btrfs_free_block_rsv(struct btrfs_fs_info
*fs_info
,
2755 struct btrfs_block_rsv
*rsv
);
2756 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
2757 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2758 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2759 enum btrfs_reserve_flush_enum flush
);
2760 int btrfs_block_rsv_check(struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2761 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2762 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2763 enum btrfs_reserve_flush_enum flush
);
2764 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2765 struct btrfs_block_rsv
*dst_rsv
, u64 num_bytes
,
2767 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2768 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2770 void btrfs_block_rsv_release(struct btrfs_fs_info
*fs_info
,
2771 struct btrfs_block_rsv
*block_rsv
,
2773 int btrfs_inc_block_group_ro(struct btrfs_fs_info
*fs_info
,
2774 struct btrfs_block_group_cache
*cache
);
2775 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache
*cache
);
2776 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2777 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2778 int btrfs_error_unpin_extent_range(struct btrfs_fs_info
*fs_info
,
2779 u64 start
, u64 end
);
2780 int btrfs_discard_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2781 u64 num_bytes
, u64
*actual_bytes
);
2782 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2783 struct btrfs_fs_info
*fs_info
, u64 type
);
2784 int btrfs_trim_fs(struct btrfs_fs_info
*fs_info
, struct fstrim_range
*range
);
2786 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2787 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2788 struct btrfs_fs_info
*fs_info
);
2789 int __get_raid_index(u64 flags
);
2790 int btrfs_start_write_no_snapshotting(struct btrfs_root
*root
);
2791 void btrfs_end_write_no_snapshotting(struct btrfs_root
*root
);
2792 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2793 void check_system_chunk(struct btrfs_trans_handle
*trans
,
2794 struct btrfs_fs_info
*fs_info
, const u64 type
);
2795 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2796 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2799 int btrfs_bin_search(struct extent_buffer
*eb
, const struct btrfs_key
*key
,
2800 int level
, int *slot
);
2801 int btrfs_comp_cpu_keys(const struct btrfs_key
*k1
, const struct btrfs_key
*k2
);
2802 int btrfs_previous_item(struct btrfs_root
*root
,
2803 struct btrfs_path
*path
, u64 min_objectid
,
2805 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2806 struct btrfs_path
*path
, u64 min_objectid
);
2807 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2808 struct btrfs_path
*path
,
2809 const struct btrfs_key
*new_key
);
2810 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2811 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2812 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2813 struct btrfs_key
*key
, int lowest_level
,
2815 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2816 struct btrfs_path
*path
,
2818 enum btrfs_compare_tree_result
{
2819 BTRFS_COMPARE_TREE_NEW
,
2820 BTRFS_COMPARE_TREE_DELETED
,
2821 BTRFS_COMPARE_TREE_CHANGED
,
2822 BTRFS_COMPARE_TREE_SAME
,
2824 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2825 struct btrfs_root
*right_root
,
2826 struct btrfs_path
*left_path
,
2827 struct btrfs_path
*right_path
,
2828 struct btrfs_key
*key
,
2829 enum btrfs_compare_tree_result result
,
2831 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2832 struct btrfs_root
*right_root
,
2833 btrfs_changed_cb_t cb
, void *ctx
);
2834 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2835 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2836 struct extent_buffer
*parent
, int parent_slot
,
2837 struct extent_buffer
**cow_ret
);
2838 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2839 struct btrfs_root
*root
,
2840 struct extent_buffer
*buf
,
2841 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2842 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2843 struct extent_buffer
*buf
);
2844 void btrfs_extend_item(struct btrfs_fs_info
*fs_info
, struct btrfs_path
*path
,
2846 void btrfs_truncate_item(struct btrfs_fs_info
*fs_info
,
2847 struct btrfs_path
*path
, u32 new_size
, int from_end
);
2848 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2849 struct btrfs_root
*root
,
2850 struct btrfs_path
*path
,
2851 const struct btrfs_key
*new_key
,
2852 unsigned long split_offset
);
2853 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2854 struct btrfs_root
*root
,
2855 struct btrfs_path
*path
,
2856 const struct btrfs_key
*new_key
);
2857 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2858 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2859 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2860 const struct btrfs_key
*key
, struct btrfs_path
*p
,
2861 int ins_len
, int cow
);
2862 int btrfs_search_old_slot(struct btrfs_root
*root
, const struct btrfs_key
*key
,
2863 struct btrfs_path
*p
, u64 time_seq
);
2864 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2865 const struct btrfs_key
*key
,
2866 struct btrfs_path
*p
, int find_higher
,
2868 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2869 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2870 int start_slot
, u64
*last_ret
,
2871 struct btrfs_key
*progress
);
2872 void btrfs_release_path(struct btrfs_path
*p
);
2873 struct btrfs_path
*btrfs_alloc_path(void);
2874 void btrfs_free_path(struct btrfs_path
*p
);
2875 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2876 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2877 struct extent_buffer
*held
, int held_rw
);
2878 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2880 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2881 struct btrfs_path
*path
, int slot
, int nr
);
2882 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2883 struct btrfs_root
*root
,
2884 struct btrfs_path
*path
)
2886 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2889 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2890 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2891 u32 total_data
, u32 total_size
, int nr
);
2892 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2893 const struct btrfs_key
*key
, void *data
, u32 data_size
);
2894 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2895 struct btrfs_root
*root
,
2896 struct btrfs_path
*path
,
2897 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2900 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2901 struct btrfs_root
*root
,
2902 struct btrfs_path
*path
,
2903 const struct btrfs_key
*key
,
2906 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2909 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2910 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2911 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2913 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2914 struct btrfs_path
*p
, u64 time_seq
)
2917 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2918 return btrfs_next_old_leaf(root
, p
, time_seq
);
2921 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2923 return btrfs_next_old_item(root
, p
, 0);
2925 int btrfs_leaf_free_space(struct btrfs_fs_info
*fs_info
,
2926 struct extent_buffer
*leaf
);
2927 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2928 struct btrfs_block_rsv
*block_rsv
,
2929 int update_ref
, int for_reloc
);
2930 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2931 struct btrfs_root
*root
,
2932 struct extent_buffer
*node
,
2933 struct extent_buffer
*parent
);
2934 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2937 * Do it this way so we only ever do one test_bit in the normal case.
2939 if (test_bit(BTRFS_FS_CLOSING_START
, &fs_info
->flags
)) {
2940 if (test_bit(BTRFS_FS_CLOSING_DONE
, &fs_info
->flags
))
2948 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2949 * anything except sleeping. This function is used to check the status of
2952 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info
*fs_info
)
2954 return fs_info
->sb
->s_flags
& MS_RDONLY
|| btrfs_fs_closing(fs_info
);
2957 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2959 kfree(fs_info
->balance_ctl
);
2960 kfree(fs_info
->delayed_root
);
2961 kfree(fs_info
->extent_root
);
2962 kfree(fs_info
->tree_root
);
2963 kfree(fs_info
->chunk_root
);
2964 kfree(fs_info
->dev_root
);
2965 kfree(fs_info
->csum_root
);
2966 kfree(fs_info
->quota_root
);
2967 kfree(fs_info
->uuid_root
);
2968 kfree(fs_info
->free_space_root
);
2969 kfree(fs_info
->super_copy
);
2970 kfree(fs_info
->super_for_commit
);
2971 security_free_mnt_opts(&fs_info
->security_opts
);
2975 /* tree mod log functions from ctree.c */
2976 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2977 struct seq_list
*elem
);
2978 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2979 struct seq_list
*elem
);
2980 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2983 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2984 struct btrfs_fs_info
*fs_info
,
2985 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2986 const char *name
, int name_len
);
2987 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2988 struct btrfs_fs_info
*fs_info
,
2989 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2990 const char *name
, int name_len
);
2991 int btrfs_del_root(struct btrfs_trans_handle
*trans
,
2992 struct btrfs_fs_info
*fs_info
, const struct btrfs_key
*key
);
2993 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2994 const struct btrfs_key
*key
,
2995 struct btrfs_root_item
*item
);
2996 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2997 struct btrfs_root
*root
,
2998 struct btrfs_key
*key
,
2999 struct btrfs_root_item
*item
);
3000 int btrfs_find_root(struct btrfs_root
*root
, const struct btrfs_key
*search_key
,
3001 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3002 struct btrfs_key
*root_key
);
3003 int btrfs_find_orphan_roots(struct btrfs_fs_info
*fs_info
);
3004 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3005 struct extent_buffer
*node
);
3006 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3007 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3008 struct btrfs_root
*root
);
3011 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
3012 struct btrfs_fs_info
*fs_info
, u8
*uuid
, u8 type
,
3014 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
3015 struct btrfs_fs_info
*fs_info
, u8
*uuid
, u8 type
,
3017 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
3018 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
3022 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3023 const char *name
, int name_len
);
3024 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3025 struct btrfs_root
*root
, const char *name
,
3026 int name_len
, struct btrfs_inode
*dir
,
3027 struct btrfs_key
*location
, u8 type
, u64 index
);
3028 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3029 struct btrfs_root
*root
,
3030 struct btrfs_path
*path
, u64 dir
,
3031 const char *name
, int name_len
,
3033 struct btrfs_dir_item
*
3034 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3035 struct btrfs_root
*root
,
3036 struct btrfs_path
*path
, u64 dir
,
3037 u64 objectid
, const char *name
, int name_len
,
3039 struct btrfs_dir_item
*
3040 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3041 struct btrfs_path
*path
, u64 dirid
,
3042 const char *name
, int name_len
);
3043 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3044 struct btrfs_root
*root
,
3045 struct btrfs_path
*path
,
3046 struct btrfs_dir_item
*di
);
3047 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3048 struct btrfs_root
*root
,
3049 struct btrfs_path
*path
, u64 objectid
,
3050 const char *name
, u16 name_len
,
3051 const void *data
, u16 data_len
);
3052 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3053 struct btrfs_root
*root
,
3054 struct btrfs_path
*path
, u64 dir
,
3055 const char *name
, u16 name_len
,
3057 int verify_dir_item(struct btrfs_fs_info
*fs_info
,
3058 struct extent_buffer
*leaf
, int slot
,
3059 struct btrfs_dir_item
*dir_item
);
3060 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_fs_info
*fs_info
,
3061 struct btrfs_path
*path
,
3064 bool btrfs_is_name_len_valid(struct extent_buffer
*leaf
, int slot
,
3065 unsigned long start
, u16 name_len
);
3068 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3069 struct btrfs_root
*root
, u64 offset
);
3070 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3071 struct btrfs_root
*root
, u64 offset
);
3072 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3075 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3076 struct btrfs_root
*root
,
3077 const char *name
, int name_len
,
3078 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3079 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3080 struct btrfs_root
*root
,
3081 const char *name
, int name_len
,
3082 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3083 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3084 struct btrfs_root
*root
,
3085 struct btrfs_path
*path
, u64 objectid
);
3086 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3087 *root
, struct btrfs_path
*path
,
3088 struct btrfs_key
*location
, int mod
);
3090 struct btrfs_inode_extref
*
3091 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3092 struct btrfs_root
*root
,
3093 struct btrfs_path
*path
,
3094 const char *name
, int name_len
,
3095 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3098 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3099 u64 ref_objectid
, const char *name
,
3101 struct btrfs_inode_extref
**extref_ret
);
3104 struct btrfs_dio_private
;
3105 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3106 struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 len
);
3107 blk_status_t
btrfs_lookup_bio_sums(struct inode
*inode
, struct bio
*bio
, u32
*dst
);
3108 blk_status_t
btrfs_lookup_bio_sums_dio(struct inode
*inode
, struct bio
*bio
,
3109 u64 logical_offset
);
3110 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3111 struct btrfs_root
*root
,
3112 u64 objectid
, u64 pos
,
3113 u64 disk_offset
, u64 disk_num_bytes
,
3114 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3115 u8 compression
, u8 encryption
, u16 other_encoding
);
3116 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3117 struct btrfs_root
*root
,
3118 struct btrfs_path
*path
, u64 objectid
,
3119 u64 bytenr
, int mod
);
3120 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3121 struct btrfs_root
*root
,
3122 struct btrfs_ordered_sum
*sums
);
3123 blk_status_t
btrfs_csum_one_bio(struct inode
*inode
, struct bio
*bio
,
3124 u64 file_start
, int contig
);
3125 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3126 struct list_head
*list
, int search_commit
);
3127 void btrfs_extent_item_to_extent_map(struct btrfs_inode
*inode
,
3128 const struct btrfs_path
*path
,
3129 struct btrfs_file_extent_item
*fi
,
3130 const bool new_inline
,
3131 struct extent_map
*em
);
3134 struct btrfs_delalloc_work
{
3135 struct inode
*inode
;
3137 struct completion completion
;
3138 struct list_head list
;
3139 struct btrfs_work work
;
3142 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3144 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3146 struct extent_map
*btrfs_get_extent_fiemap(struct btrfs_inode
*inode
,
3147 struct page
*page
, size_t pg_offset
, u64 start
,
3148 u64 len
, int create
);
3149 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3150 u64
*orig_start
, u64
*orig_block_len
,
3153 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3154 int btrfs_set_inode_index(struct btrfs_inode
*dir
, u64
*index
);
3155 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3156 struct btrfs_root
*root
,
3157 struct btrfs_inode
*dir
, struct btrfs_inode
*inode
,
3158 const char *name
, int name_len
);
3159 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3160 struct btrfs_inode
*parent_inode
, struct btrfs_inode
*inode
,
3161 const char *name
, int name_len
, int add_backref
, u64 index
);
3162 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3163 struct btrfs_root
*root
,
3164 struct inode
*dir
, u64 objectid
,
3165 const char *name
, int name_len
);
3166 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3168 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3169 struct btrfs_root
*root
,
3170 struct inode
*inode
, u64 new_size
,
3173 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3174 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3176 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3177 struct extent_state
**cached_state
, int dedupe
);
3178 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3179 struct btrfs_root
*new_root
,
3180 struct btrfs_root
*parent_root
,
3182 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3183 size_t size
, struct bio
*bio
,
3184 unsigned long bio_flags
);
3185 void btrfs_set_range_writeback(void *private_data
, u64 start
, u64 end
);
3186 int btrfs_page_mkwrite(struct vm_fault
*vmf
);
3187 int btrfs_readpage(struct file
*file
, struct page
*page
);
3188 void btrfs_evict_inode(struct inode
*inode
);
3189 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3190 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3191 void btrfs_destroy_inode(struct inode
*inode
);
3192 int btrfs_drop_inode(struct inode
*inode
);
3193 int btrfs_init_cachep(void);
3194 void btrfs_destroy_cachep(void);
3195 long btrfs_ioctl_trans_end(struct file
*file
);
3196 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3197 struct btrfs_root
*root
, int *was_new
);
3198 struct extent_map
*btrfs_get_extent(struct btrfs_inode
*inode
,
3199 struct page
*page
, size_t pg_offset
,
3200 u64 start
, u64 end
, int create
);
3201 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3202 struct btrfs_root
*root
,
3203 struct inode
*inode
);
3204 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3205 struct btrfs_root
*root
, struct inode
*inode
);
3206 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
,
3207 struct btrfs_inode
*inode
);
3208 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3209 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3210 struct btrfs_root
*root
);
3211 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3212 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3213 void btrfs_add_delayed_iput(struct inode
*inode
);
3214 void btrfs_run_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3215 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3216 u64 start
, u64 num_bytes
, u64 min_size
,
3217 loff_t actual_len
, u64
*alloc_hint
);
3218 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3219 struct btrfs_trans_handle
*trans
, int mode
,
3220 u64 start
, u64 num_bytes
, u64 min_size
,
3221 loff_t actual_len
, u64
*alloc_hint
);
3222 extern const struct dentry_operations btrfs_dentry_operations
;
3223 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3224 void btrfs_test_inode_set_ops(struct inode
*inode
);
3228 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3229 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3230 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3231 void btrfs_update_iflags(struct inode
*inode
);
3232 int btrfs_is_empty_uuid(u8
*uuid
);
3233 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3234 struct btrfs_ioctl_defrag_range_args
*range
,
3235 u64 newer_than
, unsigned long max_pages
);
3236 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3237 struct btrfs_ioctl_space_info
*space
);
3238 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3239 struct btrfs_ioctl_balance_args
*bargs
);
3240 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
3241 struct file
*dst_file
, u64 dst_loff
);
3244 int btrfs_auto_defrag_init(void);
3245 void btrfs_auto_defrag_exit(void);
3246 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3247 struct btrfs_inode
*inode
);
3248 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3249 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3250 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3251 void btrfs_drop_extent_cache(struct btrfs_inode
*inode
, u64 start
, u64 end
,
3253 extern const struct file_operations btrfs_file_operations
;
3254 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3255 struct btrfs_root
*root
, struct inode
*inode
,
3256 struct btrfs_path
*path
, u64 start
, u64 end
,
3257 u64
*drop_end
, int drop_cache
,
3259 u32 extent_item_size
,
3261 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3262 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3263 u64 end
, int drop_cache
);
3264 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3265 struct btrfs_inode
*inode
, u64 start
, u64 end
);
3266 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3267 int btrfs_dirty_pages(struct inode
*inode
, struct page
**pages
,
3268 size_t num_pages
, loff_t pos
, size_t write_bytes
,
3269 struct extent_state
**cached
);
3270 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3271 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
3272 struct file
*file_out
, loff_t pos_out
, u64 len
);
3275 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3276 struct btrfs_root
*root
);
3279 int btrfs_init_sysfs(void);
3280 void btrfs_exit_sysfs(void);
3281 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3282 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3285 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3288 int btrfs_parse_options(struct btrfs_fs_info
*info
, char *options
,
3289 unsigned long new_flags
);
3290 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3292 static inline __printf(2, 3)
3293 void btrfs_no_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3297 #ifdef CONFIG_PRINTK
3299 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3301 #define btrfs_printk(fs_info, fmt, args...) \
3302 btrfs_no_printk(fs_info, fmt, ##args)
3305 #define btrfs_emerg(fs_info, fmt, args...) \
3306 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3307 #define btrfs_alert(fs_info, fmt, args...) \
3308 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3309 #define btrfs_crit(fs_info, fmt, args...) \
3310 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3311 #define btrfs_err(fs_info, fmt, args...) \
3312 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3313 #define btrfs_warn(fs_info, fmt, args...) \
3314 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3315 #define btrfs_notice(fs_info, fmt, args...) \
3316 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3317 #define btrfs_info(fs_info, fmt, args...) \
3318 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3321 * Wrappers that use printk_in_rcu
3323 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3324 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3325 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3326 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3327 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3328 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3329 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3330 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3331 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3332 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3333 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3334 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3335 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3336 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3339 * Wrappers that use a ratelimited printk_in_rcu
3341 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3342 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3343 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3344 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3345 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3346 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3347 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3348 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3349 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3350 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3351 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3352 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3353 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3354 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3357 * Wrappers that use a ratelimited printk
3359 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3360 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3361 #define btrfs_alert_rl(fs_info, fmt, args...) \
3362 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3363 #define btrfs_crit_rl(fs_info, fmt, args...) \
3364 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3365 #define btrfs_err_rl(fs_info, fmt, args...) \
3366 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3367 #define btrfs_warn_rl(fs_info, fmt, args...) \
3368 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3369 #define btrfs_notice_rl(fs_info, fmt, args...) \
3370 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3371 #define btrfs_info_rl(fs_info, fmt, args...) \
3372 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3374 #if defined(CONFIG_DYNAMIC_DEBUG)
3375 #define btrfs_debug(fs_info, fmt, args...) \
3377 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3378 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3379 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3381 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3383 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3384 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3385 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3387 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3389 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3390 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3391 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3394 #define btrfs_debug_rl(fs_info, fmt, args...) \
3396 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3397 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3398 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3401 #elif defined(DEBUG)
3402 #define btrfs_debug(fs_info, fmt, args...) \
3403 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3404 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3405 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3406 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3407 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3408 #define btrfs_debug_rl(fs_info, fmt, args...) \
3409 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3411 #define btrfs_debug(fs_info, fmt, args...) \
3412 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3413 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3414 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3415 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3416 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3417 #define btrfs_debug_rl(fs_info, fmt, args...) \
3418 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3421 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3424 btrfs_printk(fs_info, fmt, ##args); \
3425 rcu_read_unlock(); \
3428 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3430 static DEFINE_RATELIMIT_STATE(_rs, \
3431 DEFAULT_RATELIMIT_INTERVAL, \
3432 DEFAULT_RATELIMIT_BURST); \
3433 if (__ratelimit(&_rs)) \
3434 btrfs_printk(fs_info, fmt, ##args); \
3437 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3440 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3441 rcu_read_unlock(); \
3444 #ifdef CONFIG_BTRFS_ASSERT
3447 static inline void assfail(char *expr
, char *file
, int line
)
3449 pr_err("assertion failed: %s, file: %s, line: %d\n",
3454 #define ASSERT(expr) \
3455 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3457 #define ASSERT(expr) ((void)0)
3462 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3463 unsigned int line
, int errno
, const char *fmt
, ...);
3465 const char *btrfs_decode_error(int errno
);
3468 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3469 const char *function
,
3470 unsigned int line
, int errno
);
3473 * Call btrfs_abort_transaction as early as possible when an error condition is
3474 * detected, that way the exact line number is reported.
3476 #define btrfs_abort_transaction(trans, errno) \
3478 /* Report first abort since mount */ \
3479 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3480 &((trans)->fs_info->fs_state))) { \
3481 if ((errno) != -EIO) { \
3482 WARN(1, KERN_DEBUG \
3483 "BTRFS: Transaction aborted (error %d)\n", \
3486 btrfs_debug((trans)->fs_info, \
3487 "Transaction aborted (error %d)", \
3491 __btrfs_abort_transaction((trans), __func__, \
3492 __LINE__, (errno)); \
3495 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3497 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3498 (errno), fmt, ##args); \
3503 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3504 unsigned int line
, int errno
, const char *fmt
, ...);
3506 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3507 * will panic(). Otherwise we BUG() here.
3509 #define btrfs_panic(fs_info, errno, fmt, args...) \
3511 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3516 /* compatibility and incompatibility defines */
3518 #define btrfs_set_fs_incompat(__fs_info, opt) \
3519 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3521 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3524 struct btrfs_super_block
*disk_super
;
3527 disk_super
= fs_info
->super_copy
;
3528 features
= btrfs_super_incompat_flags(disk_super
);
3529 if (!(features
& flag
)) {
3530 spin_lock(&fs_info
->super_lock
);
3531 features
= btrfs_super_incompat_flags(disk_super
);
3532 if (!(features
& flag
)) {
3534 btrfs_set_super_incompat_flags(disk_super
, features
);
3535 btrfs_info(fs_info
, "setting %llu feature flag",
3538 spin_unlock(&fs_info
->super_lock
);
3542 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3543 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3545 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3548 struct btrfs_super_block
*disk_super
;
3551 disk_super
= fs_info
->super_copy
;
3552 features
= btrfs_super_incompat_flags(disk_super
);
3553 if (features
& flag
) {
3554 spin_lock(&fs_info
->super_lock
);
3555 features
= btrfs_super_incompat_flags(disk_super
);
3556 if (features
& flag
) {
3558 btrfs_set_super_incompat_flags(disk_super
, features
);
3559 btrfs_info(fs_info
, "clearing %llu feature flag",
3562 spin_unlock(&fs_info
->super_lock
);
3566 #define btrfs_fs_incompat(fs_info, opt) \
3567 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3569 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3571 struct btrfs_super_block
*disk_super
;
3572 disk_super
= fs_info
->super_copy
;
3573 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3576 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3577 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3579 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3582 struct btrfs_super_block
*disk_super
;
3585 disk_super
= fs_info
->super_copy
;
3586 features
= btrfs_super_compat_ro_flags(disk_super
);
3587 if (!(features
& flag
)) {
3588 spin_lock(&fs_info
->super_lock
);
3589 features
= btrfs_super_compat_ro_flags(disk_super
);
3590 if (!(features
& flag
)) {
3592 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3593 btrfs_info(fs_info
, "setting %llu ro feature flag",
3596 spin_unlock(&fs_info
->super_lock
);
3600 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3601 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3603 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3606 struct btrfs_super_block
*disk_super
;
3609 disk_super
= fs_info
->super_copy
;
3610 features
= btrfs_super_compat_ro_flags(disk_super
);
3611 if (features
& flag
) {
3612 spin_lock(&fs_info
->super_lock
);
3613 features
= btrfs_super_compat_ro_flags(disk_super
);
3614 if (features
& flag
) {
3616 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3617 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3620 spin_unlock(&fs_info
->super_lock
);
3624 #define btrfs_fs_compat_ro(fs_info, opt) \
3625 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3627 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3629 struct btrfs_super_block
*disk_super
;
3630 disk_super
= fs_info
->super_copy
;
3631 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3635 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3636 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3637 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3638 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3639 struct inode
*inode
, struct inode
*dir
);
3641 #define btrfs_get_acl NULL
3642 #define btrfs_set_acl NULL
3643 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3644 struct inode
*inode
, struct inode
*dir
)
3651 int btrfs_relocate_block_group(struct btrfs_fs_info
*fs_info
, u64 group_start
);
3652 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3653 struct btrfs_root
*root
);
3654 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3655 struct btrfs_root
*root
);
3656 int btrfs_recover_relocation(struct btrfs_root
*root
);
3657 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3658 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3659 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3660 struct extent_buffer
*cow
);
3661 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3662 u64
*bytes_to_reserve
);
3663 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3664 struct btrfs_pending_snapshot
*pending
);
3667 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3668 u64 end
, struct btrfs_scrub_progress
*progress
,
3669 int readonly
, int is_dev_replace
);
3670 void btrfs_scrub_pause(struct btrfs_fs_info
*fs_info
);
3671 void btrfs_scrub_continue(struct btrfs_fs_info
*fs_info
);
3672 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3673 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3674 struct btrfs_device
*dev
);
3675 int btrfs_scrub_progress(struct btrfs_fs_info
*fs_info
, u64 devid
,
3676 struct btrfs_scrub_progress
*progress
);
3677 static inline void btrfs_init_full_stripe_locks_tree(
3678 struct btrfs_full_stripe_locks_tree
*locks_root
)
3680 locks_root
->root
= RB_ROOT
;
3681 mutex_init(&locks_root
->lock
);
3685 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3686 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3687 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3689 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3691 btrfs_bio_counter_sub(fs_info
, 1);
3695 struct reada_control
{
3696 struct btrfs_fs_info
*fs_info
; /* tree to prefetch */
3697 struct btrfs_key key_start
;
3698 struct btrfs_key key_end
; /* exclusive */
3701 wait_queue_head_t wait
;
3703 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3704 struct btrfs_key
*start
, struct btrfs_key
*end
);
3705 int btrfs_reada_wait(void *handle
);
3706 void btrfs_reada_detach(void *handle
);
3707 int btree_readahead_hook(struct extent_buffer
*eb
, int err
);
3709 static inline int is_fstree(u64 rootid
)
3711 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3712 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3713 !btrfs_qgroup_level(rootid
)))
3718 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3720 return signal_pending(current
);
3723 /* Sanity test specific functions */
3724 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3725 void btrfs_test_destroy_inode(struct inode
*inode
);
3728 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3730 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3731 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
,
3732 &fs_info
->fs_state
)))