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_transaction_cachep
;
52 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
53 extern struct kmem_cache
*btrfs_path_cachep
;
54 extern struct kmem_cache
*btrfs_free_space_cachep
;
55 struct btrfs_ordered_sum
;
57 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
58 #define STATIC noinline
60 #define STATIC static noinline
63 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
65 #define BTRFS_MAX_MIRRORS 3
67 #define BTRFS_MAX_LEVEL 8
69 #define BTRFS_COMPAT_EXTENT_TREE_V0
72 * the max metadata block size. This limit is somewhat artificial,
73 * but the memmove costs go through the roof for larger blocks.
75 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
78 * we can actually store much bigger names, but lets not confuse the rest
81 #define BTRFS_NAME_LEN 255
84 * Theoretical limit is larger, but we keep this down to a sane
85 * value. That should limit greatly the possibility of collisions on
88 #define BTRFS_LINK_MAX 65535U
90 static const int btrfs_csum_sizes
[] = { 4 };
92 /* four bytes for CRC32 */
93 #define BTRFS_EMPTY_DIR_SIZE 0
95 /* ioprio of readahead is set to idle */
96 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
98 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
100 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
103 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
105 static inline u32
count_max_extents(u64 size
)
107 return div_u64(size
+ BTRFS_MAX_EXTENT_SIZE
- 1, BTRFS_MAX_EXTENT_SIZE
);
110 struct btrfs_mapping_tree
{
111 struct extent_map_tree map_tree
;
114 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
116 BUG_ON(num_stripes
== 0);
117 return sizeof(struct btrfs_chunk
) +
118 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
124 #define BTRFS_FS_STATE_ERROR 0
125 #define BTRFS_FS_STATE_REMOUNTING 1
126 #define BTRFS_FS_STATE_TRANS_ABORTED 2
127 #define BTRFS_FS_STATE_DEV_REPLACING 3
128 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
130 #define BTRFS_BACKREF_REV_MAX 256
131 #define BTRFS_BACKREF_REV_SHIFT 56
132 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
133 BTRFS_BACKREF_REV_SHIFT)
135 #define BTRFS_OLD_BACKREF_REV 0
136 #define BTRFS_MIXED_BACKREF_REV 1
139 * every tree block (leaf or node) starts with this header.
141 struct btrfs_header
{
142 /* these first four must match the super block */
143 u8 csum
[BTRFS_CSUM_SIZE
];
144 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
145 __le64 bytenr
; /* which block this node is supposed to live in */
148 /* allowed to be different from the super from here on down */
149 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
154 } __attribute__ ((__packed__
));
157 * this is a very generous portion of the super block, giving us
158 * room to translate 14 chunks with 3 stripes each.
160 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
163 * just in case we somehow lose the roots and are not able to mount,
164 * we store an array of the roots from previous transactions
167 #define BTRFS_NUM_BACKUP_ROOTS 4
168 struct btrfs_root_backup
{
170 __le64 tree_root_gen
;
173 __le64 chunk_root_gen
;
176 __le64 extent_root_gen
;
185 __le64 csum_root_gen
;
195 u8 extent_root_level
;
199 /* future and to align */
201 } __attribute__ ((__packed__
));
204 * the super block basically lists the main trees of the FS
205 * it currently lacks any block count etc etc
207 struct btrfs_super_block
{
208 u8 csum
[BTRFS_CSUM_SIZE
];
209 /* the first 4 fields must match struct btrfs_header */
210 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
211 __le64 bytenr
; /* this block number */
214 /* allowed to be different from the btrfs_header from here own down */
221 /* this will help find the new super based on the log root */
222 __le64 log_root_transid
;
225 __le64 root_dir_objectid
;
229 __le32 __unused_leafsize
;
231 __le32 sys_chunk_array_size
;
232 __le64 chunk_root_generation
;
234 __le64 compat_ro_flags
;
235 __le64 incompat_flags
;
240 struct btrfs_dev_item dev_item
;
242 char label
[BTRFS_LABEL_SIZE
];
244 __le64 cache_generation
;
245 __le64 uuid_tree_generation
;
247 /* future expansion */
249 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
250 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
251 } __attribute__ ((__packed__
));
254 * Compat flags that we support. If any incompat flags are set other than the
255 * ones specified below then we will fail to mount
257 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
258 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
259 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
261 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
262 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
263 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
265 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
266 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
268 #define BTRFS_FEATURE_INCOMPAT_SUPP \
269 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
270 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
271 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
272 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
273 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
274 BTRFS_FEATURE_INCOMPAT_RAID56 | \
275 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
276 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
277 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
279 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
280 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
281 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
284 * A leaf is full of items. offset and size tell us where to find
285 * the item in the leaf (relative to the start of the data area)
288 struct btrfs_disk_key key
;
291 } __attribute__ ((__packed__
));
294 * leaves have an item area and a data area:
295 * [item0, item1....itemN] [free space] [dataN...data1, data0]
297 * The data is separate from the items to get the keys closer together
301 struct btrfs_header header
;
302 struct btrfs_item items
[];
303 } __attribute__ ((__packed__
));
306 * all non-leaf blocks are nodes, they hold only keys and pointers to
309 struct btrfs_key_ptr
{
310 struct btrfs_disk_key key
;
313 } __attribute__ ((__packed__
));
316 struct btrfs_header header
;
317 struct btrfs_key_ptr ptrs
[];
318 } __attribute__ ((__packed__
));
321 * btrfs_paths remember the path taken from the root down to the leaf.
322 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
323 * to any other levels that are present.
325 * The slots array records the index of the item or block pointer
326 * used while walking the tree.
328 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
330 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
331 int slots
[BTRFS_MAX_LEVEL
];
332 /* if there is real range locking, this locks field will change */
333 u8 locks
[BTRFS_MAX_LEVEL
];
335 /* keep some upper locks as we walk down */
339 * set by btrfs_split_item, tells search_slot to keep all locks
340 * and to force calls to keep space in the nodes
342 unsigned int search_for_split
:1;
343 unsigned int keep_locks
:1;
344 unsigned int skip_locking
:1;
345 unsigned int leave_spinning
:1;
346 unsigned int search_commit_root
:1;
347 unsigned int need_commit_sem
:1;
348 unsigned int skip_release_on_error
:1;
350 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
351 sizeof(struct btrfs_item))
352 struct btrfs_dev_replace
{
353 u64 replace_state
; /* see #define above */
354 u64 time_started
; /* seconds since 1-Jan-1970 */
355 u64 time_stopped
; /* seconds since 1-Jan-1970 */
356 atomic64_t num_write_errors
;
357 atomic64_t num_uncorrectable_read_errors
;
360 u64 committed_cursor_left
;
361 u64 cursor_left_last_write_of_item
;
364 u64 cont_reading_from_srcdev_mode
; /* see #define above */
367 int item_needs_writeback
;
368 struct btrfs_device
*srcdev
;
369 struct btrfs_device
*tgtdev
;
372 atomic_t nesting_level
;
373 struct mutex lock_finishing_cancel_unmount
;
376 atomic_t blocking_readers
;
377 wait_queue_head_t read_lock_wq
;
379 struct btrfs_scrub_progress scrub_progress
;
382 /* For raid type sysfs entries */
383 struct raid_kobject
{
388 struct btrfs_space_info
{
391 u64 total_bytes
; /* total bytes in the space,
392 this doesn't take mirrors into account */
393 u64 bytes_used
; /* total bytes used,
394 this doesn't take mirrors into account */
395 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
396 transaction finishes */
397 u64 bytes_reserved
; /* total bytes the allocator has reserved for
398 current allocations */
399 u64 bytes_may_use
; /* number of bytes that may be used for
400 delalloc/allocations */
401 u64 bytes_readonly
; /* total bytes that are read only */
403 u64 max_extent_size
; /* This will hold the maximum extent size of
404 the space info if we had an ENOSPC in the
407 unsigned int full
:1; /* indicates that we cannot allocate any more
408 chunks for this space */
409 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
411 unsigned int flush
:1; /* set if we are trying to make space */
413 unsigned int force_alloc
; /* set if we need to force a chunk
414 alloc for this space */
416 u64 disk_used
; /* total bytes used on disk */
417 u64 disk_total
; /* total bytes on disk, takes mirrors into
423 * bytes_pinned is kept in line with what is actually pinned, as in
424 * we've called update_block_group and dropped the bytes_used counter
425 * and increased the bytes_pinned counter. However this means that
426 * bytes_pinned does not reflect the bytes that will be pinned once the
427 * delayed refs are flushed, so this counter is inc'ed every time we
428 * call btrfs_free_extent so it is a realtime count of what will be
429 * freed once the transaction is committed. It will be zeroed every
430 * time the transaction commits.
432 struct percpu_counter total_bytes_pinned
;
434 struct list_head list
;
435 /* Protected by the spinlock 'lock'. */
436 struct list_head ro_bgs
;
437 struct list_head priority_tickets
;
438 struct list_head tickets
;
440 * tickets_id just indicates the next ticket will be handled, so note
441 * it's not stored per ticket.
445 struct rw_semaphore groups_sem
;
446 /* for block groups in our same type */
447 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
448 wait_queue_head_t wait
;
451 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
454 #define BTRFS_BLOCK_RSV_GLOBAL 1
455 #define BTRFS_BLOCK_RSV_DELALLOC 2
456 #define BTRFS_BLOCK_RSV_TRANS 3
457 #define BTRFS_BLOCK_RSV_CHUNK 4
458 #define BTRFS_BLOCK_RSV_DELOPS 5
459 #define BTRFS_BLOCK_RSV_EMPTY 6
460 #define BTRFS_BLOCK_RSV_TEMP 7
462 struct btrfs_block_rsv
{
465 struct btrfs_space_info
*space_info
;
469 unsigned short failfast
;
473 * free clusters are used to claim free space in relatively large chunks,
474 * allowing us to do less seeky writes. They are used for all metadata
475 * allocations and data allocations in ssd mode.
477 struct btrfs_free_cluster
{
479 spinlock_t refill_lock
;
482 /* largest extent in this cluster */
485 /* first extent starting offset */
488 /* We did a full search and couldn't create a cluster */
491 struct btrfs_block_group_cache
*block_group
;
493 * when a cluster is allocated from a block group, we put the
494 * cluster onto a list in the block group so that it can
495 * be freed before the block group is freed.
497 struct list_head block_group_list
;
500 enum btrfs_caching_type
{
502 BTRFS_CACHE_STARTED
= 1,
503 BTRFS_CACHE_FAST
= 2,
504 BTRFS_CACHE_FINISHED
= 3,
505 BTRFS_CACHE_ERROR
= 4,
508 enum btrfs_disk_cache_state
{
509 BTRFS_DC_WRITTEN
= 0,
515 struct btrfs_caching_control
{
516 struct list_head list
;
518 wait_queue_head_t wait
;
519 struct btrfs_work work
;
520 struct btrfs_block_group_cache
*block_group
;
525 /* Once caching_thread() finds this much free space, it will wake up waiters. */
526 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
528 struct btrfs_io_ctl
{
532 struct btrfs_fs_info
*fs_info
;
539 unsigned check_crcs
:1;
543 * Tree to record all locked full stripes of a RAID5/6 block group
545 struct btrfs_full_stripe_locks_tree
{
550 struct btrfs_block_group_cache
{
551 struct btrfs_key key
;
552 struct btrfs_block_group_item item
;
553 struct btrfs_fs_info
*fs_info
;
561 u64 cache_generation
;
565 * If the free space extent count exceeds this number, convert the block
568 u32 bitmap_high_thresh
;
571 * If the free space extent count drops below this number, convert the
572 * block group back to extents.
574 u32 bitmap_low_thresh
;
577 * It is just used for the delayed data space allocation because
578 * only the data space allocation and the relative metadata update
579 * can be done cross the transaction.
581 struct rw_semaphore data_rwsem
;
583 /* for raid56, this is a full stripe, without parity */
584 unsigned long full_stripe_len
;
588 unsigned int has_caching_ctl
:1;
589 unsigned int removed
:1;
591 int disk_cache_state
;
593 /* cache tracking stuff */
595 struct btrfs_caching_control
*caching_ctl
;
596 u64 last_byte_to_unpin
;
598 struct btrfs_space_info
*space_info
;
600 /* free space cache stuff */
601 struct btrfs_free_space_ctl
*free_space_ctl
;
603 /* block group cache stuff */
604 struct rb_node cache_node
;
606 /* for block groups in the same raid type */
607 struct list_head list
;
612 /* List of struct btrfs_free_clusters for this block group.
613 * Today it will only have one thing on it, but that may change
615 struct list_head cluster_list
;
617 /* For delayed block group creation or deletion of empty block groups */
618 struct list_head bg_list
;
620 /* For read-only block groups */
621 struct list_head ro_list
;
625 /* For dirty block groups */
626 struct list_head dirty_list
;
627 struct list_head io_list
;
629 struct btrfs_io_ctl io_ctl
;
632 * Incremented when doing extent allocations and holding a read lock
633 * on the space_info's groups_sem semaphore.
634 * Decremented when an ordered extent that represents an IO against this
635 * block group's range is created (after it's added to its inode's
636 * root's list of ordered extents) or immediately after the allocation
637 * if it's a metadata extent or fallocate extent (for these cases we
638 * don't create ordered extents).
640 atomic_t reservations
;
643 * Incremented while holding the spinlock *lock* by a task checking if
644 * it can perform a nocow write (incremented if the value for the *ro*
645 * field is 0). Decremented by such tasks once they create an ordered
646 * extent or before that if some error happens before reaching that step.
647 * This is to prevent races between block group relocation and nocow
648 * writes through direct IO.
650 atomic_t nocow_writers
;
652 /* Lock for free space tree operations. */
653 struct mutex free_space_lock
;
656 * Does the block group need to be added to the free space tree?
657 * Protected by free_space_lock.
659 int needs_free_space
;
661 /* Record locked full stripes for RAID5/6 block group */
662 struct btrfs_full_stripe_locks_tree full_stripe_locks_root
;
665 /* delayed seq elem */
667 struct list_head list
;
671 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
673 #define SEQ_LAST ((u64)-1)
675 enum btrfs_orphan_cleanup_state
{
676 ORPHAN_CLEANUP_STARTED
= 1,
677 ORPHAN_CLEANUP_DONE
= 2,
680 /* used by the raid56 code to lock stripes for read/modify/write */
681 struct btrfs_stripe_hash
{
682 struct list_head hash_list
;
683 wait_queue_head_t wait
;
687 /* used by the raid56 code to lock stripes for read/modify/write */
688 struct btrfs_stripe_hash_table
{
689 struct list_head stripe_cache
;
690 spinlock_t cache_lock
;
692 struct btrfs_stripe_hash table
[];
695 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
697 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
700 struct reloc_control
;
702 struct btrfs_fs_devices
;
703 struct btrfs_balance_control
;
704 struct btrfs_delayed_root
;
706 #define BTRFS_FS_BARRIER 1
707 #define BTRFS_FS_CLOSING_START 2
708 #define BTRFS_FS_CLOSING_DONE 3
709 #define BTRFS_FS_LOG_RECOVERING 4
710 #define BTRFS_FS_OPEN 5
711 #define BTRFS_FS_QUOTA_ENABLED 6
712 #define BTRFS_FS_QUOTA_ENABLING 7
713 #define BTRFS_FS_QUOTA_DISABLING 8
714 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
715 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
716 #define BTRFS_FS_BTREE_ERR 11
717 #define BTRFS_FS_LOG1_ERR 12
718 #define BTRFS_FS_LOG2_ERR 13
720 * Indicate that a whole-filesystem exclusive operation is running
721 * (device replace, resize, device add/delete, balance)
723 #define BTRFS_FS_EXCL_OP 14
725 struct btrfs_fs_info
{
726 u8 fsid
[BTRFS_FSID_SIZE
];
727 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
729 struct btrfs_root
*extent_root
;
730 struct btrfs_root
*tree_root
;
731 struct btrfs_root
*chunk_root
;
732 struct btrfs_root
*dev_root
;
733 struct btrfs_root
*fs_root
;
734 struct btrfs_root
*csum_root
;
735 struct btrfs_root
*quota_root
;
736 struct btrfs_root
*uuid_root
;
737 struct btrfs_root
*free_space_root
;
739 /* the log root tree is a directory of all the other log roots */
740 struct btrfs_root
*log_root_tree
;
742 spinlock_t fs_roots_radix_lock
;
743 struct radix_tree_root fs_roots_radix
;
745 /* block group cache stuff */
746 spinlock_t block_group_cache_lock
;
747 u64 first_logical_byte
;
748 struct rb_root block_group_cache_tree
;
750 /* keep track of unallocated space */
751 spinlock_t free_chunk_lock
;
752 u64 free_chunk_space
;
754 struct extent_io_tree freed_extents
[2];
755 struct extent_io_tree
*pinned_extents
;
757 /* logical->physical extent mapping */
758 struct btrfs_mapping_tree mapping_tree
;
761 * block reservation for extent, checksum, root tree and
762 * delayed dir index item
764 struct btrfs_block_rsv global_block_rsv
;
765 /* block reservation for delay allocation */
766 struct btrfs_block_rsv delalloc_block_rsv
;
767 /* block reservation for metadata operations */
768 struct btrfs_block_rsv trans_block_rsv
;
769 /* block reservation for chunk tree */
770 struct btrfs_block_rsv chunk_block_rsv
;
771 /* block reservation for delayed operations */
772 struct btrfs_block_rsv delayed_block_rsv
;
774 struct btrfs_block_rsv empty_block_rsv
;
777 u64 last_trans_committed
;
778 u64 avg_delayed_ref_runtime
;
781 * this is updated to the current trans every time a full commit
782 * is required instead of the faster short fsync log commits
784 u64 last_trans_log_full_commit
;
785 unsigned long mount_opt
;
787 * Track requests for actions that need to be done during transaction
788 * commit (like for some mount options).
790 unsigned long pending_changes
;
791 unsigned long compress_type
:4;
794 * It is a suggestive number, the read side is safe even it gets a
795 * wrong number because we will write out the data into a regular
796 * extent. The write side(mount/remount) is under ->s_umount lock,
797 * so it is also safe.
801 * Protected by ->chunk_mutex and sb->s_umount.
803 * The reason that we use two lock to protect it is because only
804 * remount and mount operations can change it and these two operations
805 * are under sb->s_umount, but the read side (chunk allocation) can not
806 * acquire sb->s_umount or the deadlock would happen. So we use two
807 * locks to protect it. On the write side, we must acquire two locks,
808 * and on the read side, we just need acquire one of them.
811 struct btrfs_transaction
*running_transaction
;
812 wait_queue_head_t transaction_throttle
;
813 wait_queue_head_t transaction_wait
;
814 wait_queue_head_t transaction_blocked_wait
;
815 wait_queue_head_t async_submit_wait
;
818 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
819 * when they are updated.
821 * Because we do not clear the flags for ever, so we needn't use
822 * the lock on the read side.
824 * We also needn't use the lock when we mount the fs, because
825 * there is no other task which will update the flag.
827 spinlock_t super_lock
;
828 struct btrfs_super_block
*super_copy
;
829 struct btrfs_super_block
*super_for_commit
;
830 struct super_block
*sb
;
831 struct inode
*btree_inode
;
832 struct mutex tree_log_mutex
;
833 struct mutex transaction_kthread_mutex
;
834 struct mutex cleaner_mutex
;
835 struct mutex chunk_mutex
;
836 struct mutex volume_mutex
;
839 * this is taken to make sure we don't set block groups ro after
840 * the free space cache has been allocated on them
842 struct mutex ro_block_group_mutex
;
844 /* this is used during read/modify/write to make sure
845 * no two ios are trying to mod the same stripe at the same
848 struct btrfs_stripe_hash_table
*stripe_hash_table
;
851 * this protects the ordered operations list only while we are
852 * processing all of the entries on it. This way we make
853 * sure the commit code doesn't find the list temporarily empty
854 * because another function happens to be doing non-waiting preflush
855 * before jumping into the main commit.
857 struct mutex ordered_operations_mutex
;
859 struct rw_semaphore commit_root_sem
;
861 struct rw_semaphore cleanup_work_sem
;
863 struct rw_semaphore subvol_sem
;
864 struct srcu_struct subvol_srcu
;
866 spinlock_t trans_lock
;
868 * the reloc mutex goes with the trans lock, it is taken
869 * during commit to protect us from the relocation code
871 struct mutex reloc_mutex
;
873 struct list_head trans_list
;
874 struct list_head dead_roots
;
875 struct list_head caching_block_groups
;
877 spinlock_t delayed_iput_lock
;
878 struct list_head delayed_iputs
;
879 struct mutex cleaner_delayed_iput_mutex
;
881 /* this protects tree_mod_seq_list */
882 spinlock_t tree_mod_seq_lock
;
883 atomic64_t tree_mod_seq
;
884 struct list_head tree_mod_seq_list
;
886 /* this protects tree_mod_log */
887 rwlock_t tree_mod_log_lock
;
888 struct rb_root tree_mod_log
;
890 atomic_t nr_async_submits
;
891 atomic_t async_submit_draining
;
892 atomic_t nr_async_bios
;
893 atomic_t async_delalloc_pages
;
894 atomic_t open_ioctl_trans
;
897 * this is used to protect the following list -- ordered_roots.
899 spinlock_t ordered_root_lock
;
902 * all fs/file tree roots in which there are data=ordered extents
903 * pending writeback are added into this list.
905 * these can span multiple transactions and basically include
906 * every dirty data page that isn't from nodatacow
908 struct list_head ordered_roots
;
910 struct mutex delalloc_root_mutex
;
911 spinlock_t delalloc_root_lock
;
912 /* all fs/file tree roots that have delalloc inodes. */
913 struct list_head delalloc_roots
;
916 * there is a pool of worker threads for checksumming during writes
917 * and a pool for checksumming after reads. This is because readers
918 * can run with FS locks held, and the writers may be waiting for
919 * those locks. We don't want ordering in the pending list to cause
920 * deadlocks, and so the two are serviced separately.
922 * A third pool does submit_bio to avoid deadlocking with the other
925 struct btrfs_workqueue
*workers
;
926 struct btrfs_workqueue
*delalloc_workers
;
927 struct btrfs_workqueue
*flush_workers
;
928 struct btrfs_workqueue
*endio_workers
;
929 struct btrfs_workqueue
*endio_meta_workers
;
930 struct btrfs_workqueue
*endio_raid56_workers
;
931 struct btrfs_workqueue
*endio_repair_workers
;
932 struct btrfs_workqueue
*rmw_workers
;
933 struct btrfs_workqueue
*endio_meta_write_workers
;
934 struct btrfs_workqueue
*endio_write_workers
;
935 struct btrfs_workqueue
*endio_freespace_worker
;
936 struct btrfs_workqueue
*submit_workers
;
937 struct btrfs_workqueue
*caching_workers
;
938 struct btrfs_workqueue
*readahead_workers
;
941 * fixup workers take dirty pages that didn't properly go through
942 * the cow mechanism and make them safe to write. It happens
943 * for the sys_munmap function call path
945 struct btrfs_workqueue
*fixup_workers
;
946 struct btrfs_workqueue
*delayed_workers
;
948 /* the extent workers do delayed refs on the extent allocation tree */
949 struct btrfs_workqueue
*extent_workers
;
950 struct task_struct
*transaction_kthread
;
951 struct task_struct
*cleaner_kthread
;
952 int thread_pool_size
;
954 struct kobject
*space_info_kobj
;
958 /* used to keep from writing metadata until there is a nice batch */
959 struct percpu_counter dirty_metadata_bytes
;
960 struct percpu_counter delalloc_bytes
;
961 s32 dirty_metadata_batch
;
964 struct list_head dirty_cowonly_roots
;
966 struct btrfs_fs_devices
*fs_devices
;
969 * the space_info list is almost entirely read only. It only changes
970 * when we add a new raid type to the FS, and that happens
971 * very rarely. RCU is used to protect it.
973 struct list_head space_info
;
975 struct btrfs_space_info
*data_sinfo
;
977 struct reloc_control
*reloc_ctl
;
979 /* data_alloc_cluster is only used in ssd mode */
980 struct btrfs_free_cluster data_alloc_cluster
;
982 /* all metadata allocations go through this cluster */
983 struct btrfs_free_cluster meta_alloc_cluster
;
985 /* auto defrag inodes go here */
986 spinlock_t defrag_inodes_lock
;
987 struct rb_root defrag_inodes
;
988 atomic_t defrag_running
;
990 /* Used to protect avail_{data, metadata, system}_alloc_bits */
991 seqlock_t profiles_lock
;
993 * these three are in extended format (availability of single
994 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
995 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
997 u64 avail_data_alloc_bits
;
998 u64 avail_metadata_alloc_bits
;
999 u64 avail_system_alloc_bits
;
1001 /* restriper state */
1002 spinlock_t balance_lock
;
1003 struct mutex balance_mutex
;
1004 atomic_t balance_running
;
1005 atomic_t balance_pause_req
;
1006 atomic_t balance_cancel_req
;
1007 struct btrfs_balance_control
*balance_ctl
;
1008 wait_queue_head_t balance_wait_q
;
1010 unsigned data_chunk_allocations
;
1011 unsigned metadata_ratio
;
1015 /* private scrub information */
1016 struct mutex scrub_lock
;
1017 atomic_t scrubs_running
;
1018 atomic_t scrub_pause_req
;
1019 atomic_t scrubs_paused
;
1020 atomic_t scrub_cancel_req
;
1021 wait_queue_head_t scrub_pause_wait
;
1022 int scrub_workers_refcnt
;
1023 struct btrfs_workqueue
*scrub_workers
;
1024 struct btrfs_workqueue
*scrub_wr_completion_workers
;
1025 struct btrfs_workqueue
*scrub_nocow_workers
;
1026 struct btrfs_workqueue
*scrub_parity_workers
;
1028 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1029 u32 check_integrity_print_mask
;
1031 /* is qgroup tracking in a consistent state? */
1034 /* holds configuration and tracking. Protected by qgroup_lock */
1035 struct rb_root qgroup_tree
;
1036 struct rb_root qgroup_op_tree
;
1037 spinlock_t qgroup_lock
;
1038 spinlock_t qgroup_op_lock
;
1039 atomic_t qgroup_op_seq
;
1042 * used to avoid frequently calling ulist_alloc()/ulist_free()
1043 * when doing qgroup accounting, it must be protected by qgroup_lock.
1045 struct ulist
*qgroup_ulist
;
1047 /* protect user change for quota operations */
1048 struct mutex qgroup_ioctl_lock
;
1050 /* list of dirty qgroups to be written at next commit */
1051 struct list_head dirty_qgroups
;
1053 /* used by qgroup for an efficient tree traversal */
1056 /* qgroup rescan items */
1057 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1058 struct btrfs_key qgroup_rescan_progress
;
1059 struct btrfs_workqueue
*qgroup_rescan_workers
;
1060 struct completion qgroup_rescan_completion
;
1061 struct btrfs_work qgroup_rescan_work
;
1062 bool qgroup_rescan_running
; /* protected by qgroup_rescan_lock */
1064 /* filesystem state */
1065 unsigned long fs_state
;
1067 struct btrfs_delayed_root
*delayed_root
;
1069 /* readahead tree */
1070 spinlock_t reada_lock
;
1071 struct radix_tree_root reada_tree
;
1073 /* readahead works cnt */
1074 atomic_t reada_works_cnt
;
1076 /* Extent buffer radix tree */
1077 spinlock_t buffer_lock
;
1078 struct radix_tree_root buffer_radix
;
1080 /* next backup root to be overwritten */
1081 int backup_root_index
;
1083 int num_tolerated_disk_barrier_failures
;
1085 /* device replace state */
1086 struct btrfs_dev_replace dev_replace
;
1088 struct percpu_counter bio_counter
;
1089 wait_queue_head_t replace_wait
;
1091 struct semaphore uuid_tree_rescan_sem
;
1093 /* Used to reclaim the metadata space in the background. */
1094 struct work_struct async_reclaim_work
;
1096 spinlock_t unused_bgs_lock
;
1097 struct list_head unused_bgs
;
1098 struct mutex unused_bg_unpin_mutex
;
1099 struct mutex delete_unused_bgs_mutex
;
1101 /* For btrfs to record security options */
1102 struct security_mnt_opts security_opts
;
1105 * Chunks that can't be freed yet (under a trim/discard operation)
1106 * and will be latter freed. Protected by fs_info->chunk_mutex.
1108 struct list_head pinned_chunks
;
1110 /* Used to record internally whether fs has been frozen */
1113 /* Cached block sizes */
1119 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
1121 return sb
->s_fs_info
;
1124 struct btrfs_subvolume_writers
{
1125 struct percpu_counter counter
;
1126 wait_queue_head_t wait
;
1130 * The state of btrfs root
1133 * btrfs_record_root_in_trans is a multi-step process,
1134 * and it can race with the balancing code. But the
1135 * race is very small, and only the first time the root
1136 * is added to each transaction. So IN_TRANS_SETUP
1137 * is used to tell us when more checks are required
1139 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1140 #define BTRFS_ROOT_REF_COWS 1
1141 #define BTRFS_ROOT_TRACK_DIRTY 2
1142 #define BTRFS_ROOT_IN_RADIX 3
1143 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1144 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1145 #define BTRFS_ROOT_FORCE_COW 6
1146 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1147 #define BTRFS_ROOT_DIRTY 8
1150 * in ram representation of the tree. extent_root is used for all allocations
1151 * and for the extent tree extent_root root.
1154 struct extent_buffer
*node
;
1156 struct extent_buffer
*commit_root
;
1157 struct btrfs_root
*log_root
;
1158 struct btrfs_root
*reloc_root
;
1160 unsigned long state
;
1161 struct btrfs_root_item root_item
;
1162 struct btrfs_key root_key
;
1163 struct btrfs_fs_info
*fs_info
;
1164 struct extent_io_tree dirty_log_pages
;
1166 struct mutex objectid_mutex
;
1168 spinlock_t accounting_lock
;
1169 struct btrfs_block_rsv
*block_rsv
;
1171 /* free ino cache stuff */
1172 struct btrfs_free_space_ctl
*free_ino_ctl
;
1173 enum btrfs_caching_type ino_cache_state
;
1174 spinlock_t ino_cache_lock
;
1175 wait_queue_head_t ino_cache_wait
;
1176 struct btrfs_free_space_ctl
*free_ino_pinned
;
1177 u64 ino_cache_progress
;
1178 struct inode
*ino_cache_inode
;
1180 struct mutex log_mutex
;
1181 wait_queue_head_t log_writer_wait
;
1182 wait_queue_head_t log_commit_wait
[2];
1183 struct list_head log_ctxs
[2];
1184 atomic_t log_writers
;
1185 atomic_t log_commit
[2];
1188 /* No matter the commit succeeds or not*/
1189 int log_transid_committed
;
1190 /* Just be updated when the commit succeeds. */
1191 int last_log_commit
;
1192 pid_t log_start_pid
;
1199 u64 highest_objectid
;
1201 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1202 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1206 u64 defrag_trans_start
;
1207 struct btrfs_key defrag_progress
;
1208 struct btrfs_key defrag_max
;
1211 /* the dirty list is only used by non-reference counted roots */
1212 struct list_head dirty_list
;
1214 struct list_head root_list
;
1216 spinlock_t log_extents_lock
[2];
1217 struct list_head logged_list
[2];
1219 spinlock_t orphan_lock
;
1220 atomic_t orphan_inodes
;
1221 struct btrfs_block_rsv
*orphan_block_rsv
;
1222 int orphan_cleanup_state
;
1224 spinlock_t inode_lock
;
1225 /* red-black tree that keeps track of in-memory inodes */
1226 struct rb_root inode_tree
;
1229 * radix tree that keeps track of delayed nodes of every inode,
1230 * protected by inode_lock
1232 struct radix_tree_root delayed_nodes_tree
;
1234 * right now this just gets used so that a root has its own devid
1235 * for stat. It may be used for more later
1239 spinlock_t root_item_lock
;
1242 struct mutex delalloc_mutex
;
1243 spinlock_t delalloc_lock
;
1245 * all of the inodes that have delalloc bytes. It is possible for
1246 * this list to be empty even when there is still dirty data=ordered
1247 * extents waiting to finish IO.
1249 struct list_head delalloc_inodes
;
1250 struct list_head delalloc_root
;
1251 u64 nr_delalloc_inodes
;
1253 struct mutex ordered_extent_mutex
;
1255 * this is used by the balancing code to wait for all the pending
1258 spinlock_t ordered_extent_lock
;
1261 * all of the data=ordered extents pending writeback
1262 * these can span multiple transactions and basically include
1263 * every dirty data page that isn't from nodatacow
1265 struct list_head ordered_extents
;
1266 struct list_head ordered_root
;
1267 u64 nr_ordered_extents
;
1270 * Number of currently running SEND ioctls to prevent
1271 * manipulation with the read-only status via SUBVOL_SETFLAGS
1273 int send_in_progress
;
1274 struct btrfs_subvolume_writers
*subv_writers
;
1275 atomic_t will_be_snapshoted
;
1277 /* For qgroup metadata space reserve */
1278 atomic64_t qgroup_meta_rsv
;
1280 static inline u32
btrfs_inode_sectorsize(const struct inode
*inode
)
1282 return btrfs_sb(inode
->i_sb
)->sectorsize
;
1285 static inline u32
__BTRFS_LEAF_DATA_SIZE(u32 blocksize
)
1287 return blocksize
- sizeof(struct btrfs_header
);
1290 static inline u32
BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info
*info
)
1292 return __BTRFS_LEAF_DATA_SIZE(info
->nodesize
);
1295 static inline u32
BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info
*info
)
1297 return BTRFS_LEAF_DATA_SIZE(info
) - sizeof(struct btrfs_item
);
1300 static inline u32
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info
*info
)
1302 return BTRFS_LEAF_DATA_SIZE(info
) / sizeof(struct btrfs_key_ptr
);
1305 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1306 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1307 static inline u32
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info
*info
)
1309 return BTRFS_MAX_ITEM_SIZE(info
) -
1310 BTRFS_FILE_EXTENT_INLINE_DATA_START
;
1313 static inline u32
BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info
*info
)
1315 return BTRFS_MAX_ITEM_SIZE(info
) - sizeof(struct btrfs_dir_item
);
1319 * Flags for mount options.
1321 * Note: don't forget to add new options to btrfs_show_options()
1323 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1324 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1325 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1326 #define BTRFS_MOUNT_SSD (1 << 3)
1327 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1328 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1329 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1330 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1331 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1332 #define BTRFS_MOUNT_NOSSD (1 << 9)
1333 #define BTRFS_MOUNT_DISCARD (1 << 10)
1334 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1335 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1336 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1337 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1338 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1339 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1340 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1341 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1342 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1343 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1344 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1345 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1346 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1347 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1348 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1349 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1350 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1352 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1353 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1355 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1356 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1357 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1358 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1361 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1363 if (!btrfs_test_opt(fs_info, opt)) \
1364 btrfs_info(fs_info, fmt, ##args); \
1365 btrfs_set_opt(fs_info->mount_opt, opt); \
1368 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1370 if (btrfs_test_opt(fs_info, opt)) \
1371 btrfs_info(fs_info, fmt, ##args); \
1372 btrfs_clear_opt(fs_info->mount_opt, opt); \
1375 #ifdef CONFIG_BTRFS_DEBUG
1377 btrfs_should_fragment_free_space(struct btrfs_block_group_cache
*block_group
)
1379 struct btrfs_fs_info
*fs_info
= block_group
->fs_info
;
1381 return (btrfs_test_opt(fs_info
, FRAGMENT_METADATA
) &&
1382 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1383 (btrfs_test_opt(fs_info
, FRAGMENT_DATA
) &&
1384 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1389 * Requests for changes that need to be done during transaction commit.
1391 * Internal mount options that are used for special handling of the real
1392 * mount options (eg. cannot be set during remount and have to be set during
1393 * transaction commit)
1396 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1397 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1398 #define BTRFS_PENDING_COMMIT (2)
1400 #define btrfs_test_pending(info, opt) \
1401 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1402 #define btrfs_set_pending(info, opt) \
1403 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1404 #define btrfs_clear_pending(info, opt) \
1405 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1408 * Helpers for setting pending mount option changes.
1410 * Expects corresponding macros
1411 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1413 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1415 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1416 btrfs_info((info), fmt, ##args); \
1417 btrfs_set_pending((info), SET_##opt); \
1418 btrfs_clear_pending((info), CLEAR_##opt); \
1422 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1424 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1425 btrfs_info((info), fmt, ##args); \
1426 btrfs_set_pending((info), CLEAR_##opt); \
1427 btrfs_clear_pending((info), SET_##opt); \
1434 #define BTRFS_INODE_NODATASUM (1 << 0)
1435 #define BTRFS_INODE_NODATACOW (1 << 1)
1436 #define BTRFS_INODE_READONLY (1 << 2)
1437 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1438 #define BTRFS_INODE_PREALLOC (1 << 4)
1439 #define BTRFS_INODE_SYNC (1 << 5)
1440 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1441 #define BTRFS_INODE_APPEND (1 << 7)
1442 #define BTRFS_INODE_NODUMP (1 << 8)
1443 #define BTRFS_INODE_NOATIME (1 << 9)
1444 #define BTRFS_INODE_DIRSYNC (1 << 10)
1445 #define BTRFS_INODE_COMPRESS (1 << 11)
1447 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1449 struct btrfs_map_token
{
1450 struct extent_buffer
*eb
;
1452 unsigned long offset
;
1455 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1456 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1458 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1460 token
->kaddr
= NULL
;
1463 /* some macros to generate set/get functions for the struct fields. This
1464 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1467 #define le8_to_cpu(v) (v)
1468 #define cpu_to_le8(v) (v)
1471 #define read_eb_member(eb, ptr, type, member, result) (\
1472 read_extent_buffer(eb, (char *)(result), \
1473 ((unsigned long)(ptr)) + \
1474 offsetof(type, member), \
1475 sizeof(((type *)0)->member)))
1477 #define write_eb_member(eb, ptr, type, member, result) (\
1478 write_extent_buffer(eb, (char *)(result), \
1479 ((unsigned long)(ptr)) + \
1480 offsetof(type, member), \
1481 sizeof(((type *)0)->member)))
1483 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1484 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1485 unsigned long off, \
1486 struct btrfs_map_token *token); \
1487 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1488 unsigned long off, u##bits val, \
1489 struct btrfs_map_token *token); \
1490 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1491 unsigned long off) \
1493 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1495 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1496 unsigned long off, u##bits val) \
1498 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1501 DECLARE_BTRFS_SETGET_BITS(8)
1502 DECLARE_BTRFS_SETGET_BITS(16)
1503 DECLARE_BTRFS_SETGET_BITS(32)
1504 DECLARE_BTRFS_SETGET_BITS(64)
1506 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1507 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1509 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1510 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1512 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1515 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1516 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1518 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1519 struct btrfs_map_token *token) \
1521 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1522 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1524 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1525 type *s, u##bits val, \
1526 struct btrfs_map_token *token) \
1528 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1529 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1532 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1533 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1535 type *p = page_address(eb->pages[0]); \
1536 u##bits res = le##bits##_to_cpu(p->member); \
1539 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1542 type *p = page_address(eb->pages[0]); \
1543 p->member = cpu_to_le##bits(val); \
1546 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1547 static inline u##bits btrfs_##name(type *s) \
1549 return le##bits##_to_cpu(s->member); \
1551 static inline void btrfs_set_##name(type *s, u##bits val) \
1553 s->member = cpu_to_le##bits(val); \
1556 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1557 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1558 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1559 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1560 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1561 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1563 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1564 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1565 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1566 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1567 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1568 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1570 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1571 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1573 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1575 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1577 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1579 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1581 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1582 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1584 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1586 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1588 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1591 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1593 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1596 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1598 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1601 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1602 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1603 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1604 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1605 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1606 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1607 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1608 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1609 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1610 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1611 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1613 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1615 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1618 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1619 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1622 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1624 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1626 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1628 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1629 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1631 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1633 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1634 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1636 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1639 unsigned long offset
= (unsigned long)c
;
1640 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1641 offset
+= nr
* sizeof(struct btrfs_stripe
);
1642 return (struct btrfs_stripe
*)offset
;
1645 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1647 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1650 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1651 struct btrfs_chunk
*c
, int nr
)
1653 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1656 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1657 struct btrfs_chunk
*c
, int nr
)
1659 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1662 /* struct btrfs_block_group_item */
1663 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1665 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1667 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1668 struct btrfs_block_group_item
, chunk_objectid
, 64);
1670 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1671 struct btrfs_block_group_item
, chunk_objectid
, 64);
1672 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1673 struct btrfs_block_group_item
, flags
, 64);
1674 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1675 struct btrfs_block_group_item
, flags
, 64);
1677 /* struct btrfs_free_space_info */
1678 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1680 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1682 /* struct btrfs_inode_ref */
1683 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1684 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1686 /* struct btrfs_inode_extref */
1687 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1688 parent_objectid
, 64);
1689 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1691 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1693 /* struct btrfs_inode_item */
1694 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1695 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1696 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1697 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1698 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1699 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1700 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1701 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1702 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1703 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1704 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1705 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1706 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1708 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1710 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1712 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1713 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1715 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1717 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1718 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1719 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1720 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1721 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1722 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1723 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1724 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1725 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1726 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1728 /* struct btrfs_dev_extent */
1729 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1731 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1732 chunk_objectid
, 64);
1733 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1735 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1737 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1739 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1740 return (unsigned long)dev
+ ptr
;
1743 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1744 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1746 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1748 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1751 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1753 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1754 struct btrfs_tree_block_info
*item
,
1755 struct btrfs_disk_key
*key
)
1757 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1760 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1761 struct btrfs_tree_block_info
*item
,
1762 struct btrfs_disk_key
*key
)
1764 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1767 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1769 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1771 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1773 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1776 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1779 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1781 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1784 static inline u32
btrfs_extent_inline_ref_size(int type
)
1786 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1787 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1788 return sizeof(struct btrfs_extent_inline_ref
);
1789 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1790 return sizeof(struct btrfs_shared_data_ref
) +
1791 sizeof(struct btrfs_extent_inline_ref
);
1792 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1793 return sizeof(struct btrfs_extent_data_ref
) +
1794 offsetof(struct btrfs_extent_inline_ref
, offset
);
1799 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1800 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1802 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1803 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1805 /* struct btrfs_node */
1806 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1807 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1808 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1810 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1813 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1816 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1817 sizeof(struct btrfs_key_ptr
) * nr
;
1818 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1821 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1825 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1826 sizeof(struct btrfs_key_ptr
) * nr
;
1827 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1830 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1833 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1834 sizeof(struct btrfs_key_ptr
) * nr
;
1835 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1838 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1842 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1843 sizeof(struct btrfs_key_ptr
) * nr
;
1844 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1847 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1849 return offsetof(struct btrfs_node
, ptrs
) +
1850 sizeof(struct btrfs_key_ptr
) * nr
;
1853 void btrfs_node_key(struct extent_buffer
*eb
,
1854 struct btrfs_disk_key
*disk_key
, int nr
);
1856 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1857 struct btrfs_disk_key
*disk_key
, int nr
)
1860 ptr
= btrfs_node_key_ptr_offset(nr
);
1861 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1862 struct btrfs_key_ptr
, key
, disk_key
);
1865 /* struct btrfs_item */
1866 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1867 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1868 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1869 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1871 static inline unsigned long btrfs_item_nr_offset(int nr
)
1873 return offsetof(struct btrfs_leaf
, items
) +
1874 sizeof(struct btrfs_item
) * nr
;
1877 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1879 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1882 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1883 struct btrfs_item
*item
)
1885 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1888 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1890 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1893 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1895 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1898 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1900 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1903 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1904 struct btrfs_disk_key
*disk_key
, int nr
)
1906 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1907 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1910 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1911 struct btrfs_disk_key
*disk_key
, int nr
)
1913 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1914 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1917 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1920 * struct btrfs_root_ref
1922 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1923 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1924 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1926 /* struct btrfs_dir_item */
1927 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1928 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1929 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1930 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1931 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1932 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1934 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1936 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1939 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1940 struct btrfs_dir_item
*item
,
1941 struct btrfs_disk_key
*key
)
1943 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1946 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1947 struct btrfs_dir_item
*item
,
1948 struct btrfs_disk_key
*key
)
1950 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1953 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1955 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1957 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1960 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1961 struct btrfs_free_space_header
*h
,
1962 struct btrfs_disk_key
*key
)
1964 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1967 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1968 struct btrfs_free_space_header
*h
,
1969 struct btrfs_disk_key
*key
)
1971 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1974 /* struct btrfs_disk_key */
1975 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1977 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1978 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1980 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1981 const struct btrfs_disk_key
*disk
)
1983 cpu
->offset
= le64_to_cpu(disk
->offset
);
1984 cpu
->type
= disk
->type
;
1985 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1988 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1989 const struct btrfs_key
*cpu
)
1991 disk
->offset
= cpu_to_le64(cpu
->offset
);
1992 disk
->type
= cpu
->type
;
1993 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1996 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1997 struct btrfs_key
*key
, int nr
)
1999 struct btrfs_disk_key disk_key
;
2000 btrfs_node_key(eb
, &disk_key
, nr
);
2001 btrfs_disk_key_to_cpu(key
, &disk_key
);
2004 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
2005 struct btrfs_key
*key
, int nr
)
2007 struct btrfs_disk_key disk_key
;
2008 btrfs_item_key(eb
, &disk_key
, nr
);
2009 btrfs_disk_key_to_cpu(key
, &disk_key
);
2012 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2013 struct btrfs_dir_item
*item
,
2014 struct btrfs_key
*key
)
2016 struct btrfs_disk_key disk_key
;
2017 btrfs_dir_item_key(eb
, item
, &disk_key
);
2018 btrfs_disk_key_to_cpu(key
, &disk_key
);
2021 static inline u8
btrfs_key_type(const struct btrfs_key
*key
)
2026 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2031 /* struct btrfs_header */
2032 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2033 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2035 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2036 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2037 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2038 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2039 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2041 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2042 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2044 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2046 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2048 return (btrfs_header_flags(eb
) & flag
) == flag
;
2051 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2053 u64 flags
= btrfs_header_flags(eb
);
2054 btrfs_set_header_flags(eb
, flags
| flag
);
2055 return (flags
& flag
) == flag
;
2058 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2060 u64 flags
= btrfs_header_flags(eb
);
2061 btrfs_set_header_flags(eb
, flags
& ~flag
);
2062 return (flags
& flag
) == flag
;
2065 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2067 u64 flags
= btrfs_header_flags(eb
);
2068 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2071 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2074 u64 flags
= btrfs_header_flags(eb
);
2075 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2076 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2077 btrfs_set_header_flags(eb
, flags
);
2080 static inline unsigned long btrfs_header_fsid(void)
2082 return offsetof(struct btrfs_header
, fsid
);
2085 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2087 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2090 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2092 return btrfs_header_level(eb
) == 0;
2095 /* struct btrfs_root_item */
2096 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2098 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2099 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2100 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2102 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2104 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2105 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2106 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2107 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2108 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2109 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2110 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2111 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2113 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2115 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2117 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2119 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2121 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2124 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2126 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2129 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2131 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2134 /* struct btrfs_root_backup */
2135 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2137 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2139 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2140 tree_root_level
, 8);
2142 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2144 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2145 chunk_root_gen
, 64);
2146 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2147 chunk_root_level
, 8);
2149 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2151 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2152 extent_root_gen
, 64);
2153 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2154 extent_root_level
, 8);
2156 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2158 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2160 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2163 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2165 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2167 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2170 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2172 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2174 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2175 csum_root_level
, 8);
2176 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2178 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2180 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2183 /* struct btrfs_balance_item */
2184 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2186 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2187 struct btrfs_balance_item
*bi
,
2188 struct btrfs_disk_balance_args
*ba
)
2190 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2193 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2194 struct btrfs_balance_item
*bi
,
2195 struct btrfs_disk_balance_args
*ba
)
2197 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2200 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2201 struct btrfs_balance_item
*bi
,
2202 struct btrfs_disk_balance_args
*ba
)
2204 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2207 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2208 struct btrfs_balance_item
*bi
,
2209 struct btrfs_disk_balance_args
*ba
)
2211 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2214 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2215 struct btrfs_balance_item
*bi
,
2216 struct btrfs_disk_balance_args
*ba
)
2218 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2221 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2222 struct btrfs_balance_item
*bi
,
2223 struct btrfs_disk_balance_args
*ba
)
2225 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2229 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2230 struct btrfs_disk_balance_args
*disk
)
2232 memset(cpu
, 0, sizeof(*cpu
));
2234 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2235 cpu
->usage
= le64_to_cpu(disk
->usage
);
2236 cpu
->devid
= le64_to_cpu(disk
->devid
);
2237 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2238 cpu
->pend
= le64_to_cpu(disk
->pend
);
2239 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2240 cpu
->vend
= le64_to_cpu(disk
->vend
);
2241 cpu
->target
= le64_to_cpu(disk
->target
);
2242 cpu
->flags
= le64_to_cpu(disk
->flags
);
2243 cpu
->limit
= le64_to_cpu(disk
->limit
);
2244 cpu
->stripes_min
= le32_to_cpu(disk
->stripes_min
);
2245 cpu
->stripes_max
= le32_to_cpu(disk
->stripes_max
);
2249 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2250 struct btrfs_balance_args
*cpu
)
2252 memset(disk
, 0, sizeof(*disk
));
2254 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2255 disk
->usage
= cpu_to_le64(cpu
->usage
);
2256 disk
->devid
= cpu_to_le64(cpu
->devid
);
2257 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2258 disk
->pend
= cpu_to_le64(cpu
->pend
);
2259 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2260 disk
->vend
= cpu_to_le64(cpu
->vend
);
2261 disk
->target
= cpu_to_le64(cpu
->target
);
2262 disk
->flags
= cpu_to_le64(cpu
->flags
);
2263 disk
->limit
= cpu_to_le64(cpu
->limit
);
2264 disk
->stripes_min
= cpu_to_le32(cpu
->stripes_min
);
2265 disk
->stripes_max
= cpu_to_le32(cpu
->stripes_max
);
2268 /* struct btrfs_super_block */
2269 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2270 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2271 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2273 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2274 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2275 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2276 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2277 struct btrfs_super_block
, chunk_root_generation
, 64);
2278 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2280 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2282 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2283 chunk_root_level
, 8);
2284 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2286 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2287 log_root_transid
, 64);
2288 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2290 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2292 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2294 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2296 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2298 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2300 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2301 root_dir_objectid
, 64);
2302 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2304 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2306 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2307 compat_ro_flags
, 64);
2308 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2309 incompat_flags
, 64);
2310 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2312 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2313 cache_generation
, 64);
2314 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2315 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2316 uuid_tree_generation
, 64);
2318 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2320 u16 t
= btrfs_super_csum_type(s
);
2322 * csum type is validated at mount time
2324 return btrfs_csum_sizes
[t
];
2327 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2329 return offsetof(struct btrfs_leaf
, items
);
2333 * The leaf data grows from end-to-front in the node.
2334 * this returns the address of the start of the last item,
2335 * which is the stop of the leaf data stack
2337 static inline unsigned int leaf_data_end(struct btrfs_fs_info
*fs_info
,
2338 struct extent_buffer
*leaf
)
2340 u32 nr
= btrfs_header_nritems(leaf
);
2343 return BTRFS_LEAF_DATA_SIZE(fs_info
);
2344 return btrfs_item_offset_nr(leaf
, nr
- 1);
2347 /* struct btrfs_file_extent_item */
2348 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2349 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2350 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2351 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2352 struct btrfs_file_extent_item
, offset
, 64);
2353 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2354 struct btrfs_file_extent_item
, generation
, 64);
2355 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2356 struct btrfs_file_extent_item
, num_bytes
, 64);
2357 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2358 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2359 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2360 struct btrfs_file_extent_item
, compression
, 8);
2362 static inline unsigned long
2363 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2365 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2368 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2370 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2373 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2375 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2377 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2378 disk_num_bytes
, 64);
2379 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2381 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2383 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2385 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2387 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2389 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2390 other_encoding
, 16);
2393 * this returns the number of bytes used by the item on disk, minus the
2394 * size of any extent headers. If a file is compressed on disk, this is
2395 * the compressed size
2397 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2398 struct btrfs_item
*e
)
2400 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2403 /* this returns the number of file bytes represented by the inline item.
2404 * If an item is compressed, this is the uncompressed size
2406 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2408 struct btrfs_file_extent_item
*fi
)
2410 struct btrfs_map_token token
;
2412 btrfs_init_map_token(&token
);
2414 * return the space used on disk if this item isn't
2415 * compressed or encoded
2417 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
2418 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
2419 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
2420 return btrfs_file_extent_inline_item_len(eb
,
2421 btrfs_item_nr(slot
));
2424 /* otherwise use the ram bytes field */
2425 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
2429 /* btrfs_dev_stats_item */
2430 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2431 struct btrfs_dev_stats_item
*ptr
,
2436 read_extent_buffer(eb
, &val
,
2437 offsetof(struct btrfs_dev_stats_item
, values
) +
2438 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2443 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2444 struct btrfs_dev_stats_item
*ptr
,
2447 write_extent_buffer(eb
, &val
,
2448 offsetof(struct btrfs_dev_stats_item
, values
) +
2449 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2453 /* btrfs_qgroup_status_item */
2454 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2456 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2458 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2460 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2463 /* btrfs_qgroup_info_item */
2464 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2466 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2467 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2469 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2470 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2473 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2474 struct btrfs_qgroup_info_item
, generation
, 64);
2475 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2477 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2478 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2479 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2481 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2482 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2484 /* btrfs_qgroup_limit_item */
2485 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2487 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2489 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2491 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2493 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2496 /* btrfs_dev_replace_item */
2497 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2498 struct btrfs_dev_replace_item
, src_devid
, 64);
2499 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2500 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2502 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2504 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2506 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2508 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2509 num_write_errors
, 64);
2510 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2511 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2513 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2515 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2518 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2519 struct btrfs_dev_replace_item
, src_devid
, 64);
2520 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2521 struct btrfs_dev_replace_item
,
2522 cont_reading_from_srcdev_mode
, 64);
2523 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2524 struct btrfs_dev_replace_item
, replace_state
, 64);
2525 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2526 struct btrfs_dev_replace_item
, time_started
, 64);
2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2528 struct btrfs_dev_replace_item
, time_stopped
, 64);
2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2530 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2532 struct btrfs_dev_replace_item
,
2533 num_uncorrectable_read_errors
, 64);
2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2535 struct btrfs_dev_replace_item
, cursor_left
, 64);
2536 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2537 struct btrfs_dev_replace_item
, cursor_right
, 64);
2539 /* helper function to cast into the data area of the leaf. */
2540 #define btrfs_item_ptr(leaf, slot, type) \
2541 ((type *)(btrfs_leaf_data(leaf) + \
2542 btrfs_item_offset_nr(leaf, slot)))
2544 #define btrfs_item_ptr_offset(leaf, slot) \
2545 ((unsigned long)(btrfs_leaf_data(leaf) + \
2546 btrfs_item_offset_nr(leaf, slot)))
2548 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2550 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2551 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2554 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2556 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2561 u64
btrfs_csum_bytes_to_leaves(struct btrfs_fs_info
*fs_info
, u64 csum_bytes
);
2563 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_fs_info
*fs_info
,
2566 return fs_info
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2570 * Doing a truncate won't result in new nodes or leaves, just what we need for
2573 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_fs_info
*fs_info
,
2576 return fs_info
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2579 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
2580 struct btrfs_fs_info
*fs_info
);
2581 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
2582 struct btrfs_fs_info
*fs_info
);
2583 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2585 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2586 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2587 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2588 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2589 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2590 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2591 struct btrfs_fs_info
*fs_info
, unsigned long count
);
2592 int btrfs_async_run_delayed_refs(struct btrfs_fs_info
*fs_info
,
2593 unsigned long count
, u64 transid
, int wait
);
2594 int btrfs_lookup_data_extent(struct btrfs_fs_info
*fs_info
, u64 start
, u64 len
);
2595 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2596 struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2597 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2598 int btrfs_pin_extent(struct btrfs_fs_info
*fs_info
,
2599 u64 bytenr
, u64 num
, int reserved
);
2600 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info
*fs_info
,
2601 u64 bytenr
, u64 num_bytes
);
2602 int btrfs_exclude_logged_extents(struct btrfs_fs_info
*fs_info
,
2603 struct extent_buffer
*eb
);
2604 int btrfs_cross_ref_exist(struct btrfs_root
*root
,
2605 u64 objectid
, u64 offset
, u64 bytenr
);
2606 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2607 struct btrfs_fs_info
*info
,
2609 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2610 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2611 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
2612 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2613 struct btrfs_root
*root
,
2614 u64 parent
, u64 root_objectid
,
2615 const struct btrfs_disk_key
*key
,
2616 int level
, u64 hint
,
2618 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2619 struct btrfs_root
*root
,
2620 struct extent_buffer
*buf
,
2621 u64 parent
, int last_ref
);
2622 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2623 u64 root_objectid
, u64 owner
,
2624 u64 offset
, u64 ram_bytes
,
2625 struct btrfs_key
*ins
);
2626 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2627 struct btrfs_fs_info
*fs_info
,
2628 u64 root_objectid
, u64 owner
, u64 offset
,
2629 struct btrfs_key
*ins
);
2630 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 ram_bytes
, u64 num_bytes
,
2631 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2632 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2633 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2634 struct extent_buffer
*buf
, int full_backref
);
2635 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2636 struct extent_buffer
*buf
, int full_backref
);
2637 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2638 struct btrfs_fs_info
*fs_info
,
2639 u64 bytenr
, u64 num_bytes
, u64 flags
,
2640 int level
, int is_data
);
2641 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2642 struct btrfs_fs_info
*fs_info
,
2643 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2644 u64 owner
, u64 offset
);
2646 int btrfs_free_reserved_extent(struct btrfs_fs_info
*fs_info
,
2647 u64 start
, u64 len
, int delalloc
);
2648 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info
*fs_info
,
2649 u64 start
, u64 len
);
2650 void btrfs_prepare_extent_commit(struct btrfs_fs_info
*fs_info
);
2651 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2652 struct btrfs_fs_info
*fs_info
);
2653 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2654 struct btrfs_fs_info
*fs_info
,
2655 u64 bytenr
, u64 num_bytes
, u64 parent
,
2656 u64 root_objectid
, u64 owner
, u64 offset
);
2658 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2659 struct btrfs_fs_info
*fs_info
);
2660 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2661 struct btrfs_fs_info
*fs_info
);
2662 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2663 struct btrfs_fs_info
*fs_info
);
2664 int btrfs_extent_readonly(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2665 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2666 int btrfs_read_block_groups(struct btrfs_fs_info
*info
);
2667 int btrfs_can_relocate(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2668 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2669 struct btrfs_fs_info
*fs_info
, u64 bytes_used
,
2670 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2672 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2673 struct btrfs_fs_info
*fs_info
,
2674 const u64 chunk_offset
);
2675 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2676 struct btrfs_fs_info
*fs_info
, u64 group_start
,
2677 struct extent_map
*em
);
2678 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2679 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2680 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2681 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
2682 struct btrfs_fs_info
*fs_info
);
2683 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2684 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2686 enum btrfs_reserve_flush_enum
{
2687 /* If we are in the transaction, we can't flush anything.*/
2688 BTRFS_RESERVE_NO_FLUSH
,
2690 * Flushing delalloc may cause deadlock somewhere, in this
2691 * case, use FLUSH LIMIT
2693 BTRFS_RESERVE_FLUSH_LIMIT
,
2694 BTRFS_RESERVE_FLUSH_ALL
,
2697 enum btrfs_flush_state
{
2698 FLUSH_DELAYED_ITEMS_NR
= 1,
2699 FLUSH_DELAYED_ITEMS
= 2,
2701 FLUSH_DELALLOC_WAIT
= 4,
2706 int btrfs_check_data_free_space(struct inode
*inode
, u64 start
, u64 len
);
2707 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode
*inode
, u64 bytes
);
2708 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 start
, u64 len
);
2709 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2711 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2712 struct btrfs_fs_info
*fs_info
);
2713 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2714 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2715 struct btrfs_inode
*inode
);
2716 void btrfs_orphan_release_metadata(struct btrfs_inode
*inode
);
2717 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2718 struct btrfs_block_rsv
*rsv
,
2720 u64
*qgroup_reserved
, bool use_global_rsv
);
2721 void btrfs_subvolume_release_metadata(struct btrfs_fs_info
*fs_info
,
2722 struct btrfs_block_rsv
*rsv
);
2723 int btrfs_delalloc_reserve_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2724 void btrfs_delalloc_release_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2725 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 start
, u64 len
);
2726 void btrfs_delalloc_release_space(struct inode
*inode
, u64 start
, u64 len
);
2727 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2728 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_fs_info
*fs_info
,
2729 unsigned short type
);
2730 void btrfs_free_block_rsv(struct btrfs_fs_info
*fs_info
,
2731 struct btrfs_block_rsv
*rsv
);
2732 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
2733 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2734 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2735 enum btrfs_reserve_flush_enum flush
);
2736 int btrfs_block_rsv_check(struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2737 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2738 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2739 enum btrfs_reserve_flush_enum flush
);
2740 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2741 struct btrfs_block_rsv
*dst_rsv
, u64 num_bytes
,
2743 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2744 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2746 void btrfs_block_rsv_release(struct btrfs_fs_info
*fs_info
,
2747 struct btrfs_block_rsv
*block_rsv
,
2749 int btrfs_inc_block_group_ro(struct btrfs_fs_info
*fs_info
,
2750 struct btrfs_block_group_cache
*cache
);
2751 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache
*cache
);
2752 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2753 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2754 int btrfs_error_unpin_extent_range(struct btrfs_fs_info
*fs_info
,
2755 u64 start
, u64 end
);
2756 int btrfs_discard_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2757 u64 num_bytes
, u64
*actual_bytes
);
2758 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2759 struct btrfs_fs_info
*fs_info
, u64 type
);
2760 int btrfs_trim_fs(struct btrfs_fs_info
*fs_info
, struct fstrim_range
*range
);
2762 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2763 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2764 struct btrfs_fs_info
*fs_info
);
2765 int __get_raid_index(u64 flags
);
2766 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
2767 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
2768 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2769 void check_system_chunk(struct btrfs_trans_handle
*trans
,
2770 struct btrfs_fs_info
*fs_info
, const u64 type
);
2771 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2772 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2775 int btrfs_bin_search(struct extent_buffer
*eb
, const struct btrfs_key
*key
,
2776 int level
, int *slot
);
2777 int btrfs_comp_cpu_keys(const struct btrfs_key
*k1
, const struct btrfs_key
*k2
);
2778 int btrfs_previous_item(struct btrfs_root
*root
,
2779 struct btrfs_path
*path
, u64 min_objectid
,
2781 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2782 struct btrfs_path
*path
, u64 min_objectid
);
2783 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2784 struct btrfs_path
*path
,
2785 const struct btrfs_key
*new_key
);
2786 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2787 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2788 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2789 struct btrfs_key
*key
, int lowest_level
,
2791 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2792 struct btrfs_path
*path
,
2794 enum btrfs_compare_tree_result
{
2795 BTRFS_COMPARE_TREE_NEW
,
2796 BTRFS_COMPARE_TREE_DELETED
,
2797 BTRFS_COMPARE_TREE_CHANGED
,
2798 BTRFS_COMPARE_TREE_SAME
,
2800 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2801 struct btrfs_root
*right_root
,
2802 struct btrfs_path
*left_path
,
2803 struct btrfs_path
*right_path
,
2804 struct btrfs_key
*key
,
2805 enum btrfs_compare_tree_result result
,
2807 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2808 struct btrfs_root
*right_root
,
2809 btrfs_changed_cb_t cb
, void *ctx
);
2810 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2811 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2812 struct extent_buffer
*parent
, int parent_slot
,
2813 struct extent_buffer
**cow_ret
);
2814 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2815 struct btrfs_root
*root
,
2816 struct extent_buffer
*buf
,
2817 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2818 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2819 struct extent_buffer
*buf
);
2820 void btrfs_extend_item(struct btrfs_fs_info
*fs_info
, struct btrfs_path
*path
,
2822 void btrfs_truncate_item(struct btrfs_fs_info
*fs_info
,
2823 struct btrfs_path
*path
, u32 new_size
, int from_end
);
2824 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2825 struct btrfs_root
*root
,
2826 struct btrfs_path
*path
,
2827 const struct btrfs_key
*new_key
,
2828 unsigned long split_offset
);
2829 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2830 struct btrfs_root
*root
,
2831 struct btrfs_path
*path
,
2832 const struct btrfs_key
*new_key
);
2833 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2834 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2835 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2836 const struct btrfs_key
*key
, struct btrfs_path
*p
,
2837 int ins_len
, int cow
);
2838 int btrfs_search_old_slot(struct btrfs_root
*root
, const struct btrfs_key
*key
,
2839 struct btrfs_path
*p
, u64 time_seq
);
2840 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2841 const struct btrfs_key
*key
,
2842 struct btrfs_path
*p
, int find_higher
,
2844 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2845 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2846 int start_slot
, u64
*last_ret
,
2847 struct btrfs_key
*progress
);
2848 void btrfs_release_path(struct btrfs_path
*p
);
2849 struct btrfs_path
*btrfs_alloc_path(void);
2850 void btrfs_free_path(struct btrfs_path
*p
);
2851 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2852 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2853 struct extent_buffer
*held
, int held_rw
);
2854 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2856 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2857 struct btrfs_path
*path
, int slot
, int nr
);
2858 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2859 struct btrfs_root
*root
,
2860 struct btrfs_path
*path
)
2862 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2865 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2866 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2867 u32 total_data
, u32 total_size
, int nr
);
2868 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2869 const struct btrfs_key
*key
, void *data
, u32 data_size
);
2870 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2871 struct btrfs_root
*root
,
2872 struct btrfs_path
*path
,
2873 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2876 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2877 struct btrfs_root
*root
,
2878 struct btrfs_path
*path
,
2879 const struct btrfs_key
*key
,
2882 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2885 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2886 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2887 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2889 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2890 struct btrfs_path
*p
, u64 time_seq
)
2893 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2894 return btrfs_next_old_leaf(root
, p
, time_seq
);
2897 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2899 return btrfs_next_old_item(root
, p
, 0);
2901 int btrfs_leaf_free_space(struct btrfs_fs_info
*fs_info
,
2902 struct extent_buffer
*leaf
);
2903 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2904 struct btrfs_block_rsv
*block_rsv
,
2905 int update_ref
, int for_reloc
);
2906 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2907 struct btrfs_root
*root
,
2908 struct extent_buffer
*node
,
2909 struct extent_buffer
*parent
);
2910 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2913 * Do it this way so we only ever do one test_bit in the normal case.
2915 if (test_bit(BTRFS_FS_CLOSING_START
, &fs_info
->flags
)) {
2916 if (test_bit(BTRFS_FS_CLOSING_DONE
, &fs_info
->flags
))
2924 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2925 * anything except sleeping. This function is used to check the status of
2928 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info
*fs_info
)
2930 return fs_info
->sb
->s_flags
& MS_RDONLY
|| btrfs_fs_closing(fs_info
);
2933 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2935 kfree(fs_info
->balance_ctl
);
2936 kfree(fs_info
->delayed_root
);
2937 kfree(fs_info
->extent_root
);
2938 kfree(fs_info
->tree_root
);
2939 kfree(fs_info
->chunk_root
);
2940 kfree(fs_info
->dev_root
);
2941 kfree(fs_info
->csum_root
);
2942 kfree(fs_info
->quota_root
);
2943 kfree(fs_info
->uuid_root
);
2944 kfree(fs_info
->free_space_root
);
2945 kfree(fs_info
->super_copy
);
2946 kfree(fs_info
->super_for_commit
);
2947 security_free_mnt_opts(&fs_info
->security_opts
);
2951 /* tree mod log functions from ctree.c */
2952 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2953 struct seq_list
*elem
);
2954 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2955 struct seq_list
*elem
);
2956 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2959 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2960 struct btrfs_fs_info
*fs_info
,
2961 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2962 const char *name
, int name_len
);
2963 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2964 struct btrfs_fs_info
*fs_info
,
2965 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2966 const char *name
, int name_len
);
2967 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2968 const struct btrfs_key
*key
);
2969 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2970 const struct btrfs_key
*key
,
2971 struct btrfs_root_item
*item
);
2972 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2973 struct btrfs_root
*root
,
2974 struct btrfs_key
*key
,
2975 struct btrfs_root_item
*item
);
2976 int btrfs_find_root(struct btrfs_root
*root
, const struct btrfs_key
*search_key
,
2977 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
2978 struct btrfs_key
*root_key
);
2979 int btrfs_find_orphan_roots(struct btrfs_fs_info
*fs_info
);
2980 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2981 struct extent_buffer
*node
);
2982 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2983 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
2984 struct btrfs_root
*root
);
2987 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
2988 struct btrfs_fs_info
*fs_info
, u8
*uuid
, u8 type
,
2990 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
2991 struct btrfs_fs_info
*fs_info
, u8
*uuid
, u8 type
,
2993 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
2994 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
2998 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
2999 const char *name
, int name_len
);
3000 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
3001 struct btrfs_root
*root
, const char *name
,
3002 int name_len
, struct btrfs_inode
*dir
,
3003 struct btrfs_key
*location
, u8 type
, u64 index
);
3004 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3005 struct btrfs_root
*root
,
3006 struct btrfs_path
*path
, u64 dir
,
3007 const char *name
, int name_len
,
3009 struct btrfs_dir_item
*
3010 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3011 struct btrfs_root
*root
,
3012 struct btrfs_path
*path
, u64 dir
,
3013 u64 objectid
, const char *name
, int name_len
,
3015 struct btrfs_dir_item
*
3016 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3017 struct btrfs_path
*path
, u64 dirid
,
3018 const char *name
, int name_len
);
3019 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3020 struct btrfs_root
*root
,
3021 struct btrfs_path
*path
,
3022 struct btrfs_dir_item
*di
);
3023 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3024 struct btrfs_root
*root
,
3025 struct btrfs_path
*path
, u64 objectid
,
3026 const char *name
, u16 name_len
,
3027 const void *data
, u16 data_len
);
3028 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3029 struct btrfs_root
*root
,
3030 struct btrfs_path
*path
, u64 dir
,
3031 const char *name
, u16 name_len
,
3033 int verify_dir_item(struct btrfs_fs_info
*fs_info
,
3034 struct extent_buffer
*leaf
,
3035 struct btrfs_dir_item
*dir_item
);
3036 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_fs_info
*fs_info
,
3037 struct btrfs_path
*path
,
3042 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3043 struct btrfs_root
*root
, u64 offset
);
3044 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3045 struct btrfs_root
*root
, u64 offset
);
3046 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3049 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3050 struct btrfs_root
*root
,
3051 const char *name
, int name_len
,
3052 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3053 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3054 struct btrfs_root
*root
,
3055 const char *name
, int name_len
,
3056 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3057 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3058 struct btrfs_root
*root
,
3059 struct btrfs_path
*path
, u64 objectid
);
3060 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3061 *root
, struct btrfs_path
*path
,
3062 struct btrfs_key
*location
, int mod
);
3064 struct btrfs_inode_extref
*
3065 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3066 struct btrfs_root
*root
,
3067 struct btrfs_path
*path
,
3068 const char *name
, int name_len
,
3069 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3072 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3073 u64 ref_objectid
, const char *name
,
3075 struct btrfs_inode_extref
**extref_ret
);
3078 struct btrfs_dio_private
;
3079 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3080 struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 len
);
3081 int btrfs_lookup_bio_sums(struct inode
*inode
, struct bio
*bio
, u32
*dst
);
3082 int btrfs_lookup_bio_sums_dio(struct inode
*inode
, struct bio
*bio
,
3083 u64 logical_offset
);
3084 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3085 struct btrfs_root
*root
,
3086 u64 objectid
, u64 pos
,
3087 u64 disk_offset
, u64 disk_num_bytes
,
3088 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3089 u8 compression
, u8 encryption
, u16 other_encoding
);
3090 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3091 struct btrfs_root
*root
,
3092 struct btrfs_path
*path
, u64 objectid
,
3093 u64 bytenr
, int mod
);
3094 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3095 struct btrfs_root
*root
,
3096 struct btrfs_ordered_sum
*sums
);
3097 int btrfs_csum_one_bio(struct inode
*inode
, struct bio
*bio
,
3098 u64 file_start
, int contig
);
3099 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3100 struct list_head
*list
, int search_commit
);
3101 void btrfs_extent_item_to_extent_map(struct btrfs_inode
*inode
,
3102 const struct btrfs_path
*path
,
3103 struct btrfs_file_extent_item
*fi
,
3104 const bool new_inline
,
3105 struct extent_map
*em
);
3108 struct btrfs_delalloc_work
{
3109 struct inode
*inode
;
3111 struct completion completion
;
3112 struct list_head list
;
3113 struct btrfs_work work
;
3116 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3118 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3120 struct extent_map
*btrfs_get_extent_fiemap(struct btrfs_inode
*inode
,
3121 struct page
*page
, size_t pg_offset
, u64 start
,
3122 u64 len
, int create
);
3123 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3124 u64
*orig_start
, u64
*orig_block_len
,
3127 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3128 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3129 #define ClearPageChecked ClearPageFsMisc
3130 #define SetPageChecked SetPageFsMisc
3131 #define PageChecked PageFsMisc
3134 /* This forces readahead on a given range of bytes in an inode */
3135 static inline void btrfs_force_ra(struct address_space
*mapping
,
3136 struct file_ra_state
*ra
, struct file
*file
,
3137 pgoff_t offset
, unsigned long req_size
)
3139 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3142 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3143 int btrfs_set_inode_index(struct btrfs_inode
*dir
, u64
*index
);
3144 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3145 struct btrfs_root
*root
,
3146 struct btrfs_inode
*dir
, struct btrfs_inode
*inode
,
3147 const char *name
, int name_len
);
3148 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3149 struct btrfs_inode
*parent_inode
, struct btrfs_inode
*inode
,
3150 const char *name
, int name_len
, int add_backref
, u64 index
);
3151 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3152 struct btrfs_root
*root
,
3153 struct inode
*dir
, u64 objectid
,
3154 const char *name
, int name_len
);
3155 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3157 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3158 struct btrfs_root
*root
,
3159 struct inode
*inode
, u64 new_size
,
3162 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3163 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3165 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3166 struct extent_state
**cached_state
, int dedupe
);
3167 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3168 struct btrfs_root
*new_root
,
3169 struct btrfs_root
*parent_root
,
3171 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3172 size_t size
, struct bio
*bio
,
3173 unsigned long bio_flags
);
3174 int btrfs_page_mkwrite(struct vm_fault
*vmf
);
3175 int btrfs_readpage(struct file
*file
, struct page
*page
);
3176 void btrfs_evict_inode(struct inode
*inode
);
3177 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3178 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3179 void btrfs_destroy_inode(struct inode
*inode
);
3180 int btrfs_drop_inode(struct inode
*inode
);
3181 int btrfs_init_cachep(void);
3182 void btrfs_destroy_cachep(void);
3183 long btrfs_ioctl_trans_end(struct file
*file
);
3184 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3185 struct btrfs_root
*root
, int *was_new
);
3186 struct extent_map
*btrfs_get_extent(struct btrfs_inode
*inode
,
3187 struct page
*page
, size_t pg_offset
,
3188 u64 start
, u64 end
, int create
);
3189 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3190 struct btrfs_root
*root
,
3191 struct inode
*inode
);
3192 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3193 struct btrfs_root
*root
, struct inode
*inode
);
3194 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
,
3195 struct btrfs_inode
*inode
);
3196 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3197 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3198 struct btrfs_root
*root
);
3199 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3200 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3201 void btrfs_add_delayed_iput(struct inode
*inode
);
3202 void btrfs_run_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3203 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3204 u64 start
, u64 num_bytes
, u64 min_size
,
3205 loff_t actual_len
, u64
*alloc_hint
);
3206 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3207 struct btrfs_trans_handle
*trans
, int mode
,
3208 u64 start
, u64 num_bytes
, u64 min_size
,
3209 loff_t actual_len
, u64
*alloc_hint
);
3210 extern const struct dentry_operations btrfs_dentry_operations
;
3211 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3212 void btrfs_test_inode_set_ops(struct inode
*inode
);
3216 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3217 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3218 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3219 void btrfs_update_iflags(struct inode
*inode
);
3220 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3221 int btrfs_is_empty_uuid(u8
*uuid
);
3222 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3223 struct btrfs_ioctl_defrag_range_args
*range
,
3224 u64 newer_than
, unsigned long max_pages
);
3225 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3226 struct btrfs_ioctl_space_info
*space
);
3227 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3228 struct btrfs_ioctl_balance_args
*bargs
);
3229 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
3230 struct file
*dst_file
, u64 dst_loff
);
3233 int btrfs_auto_defrag_init(void);
3234 void btrfs_auto_defrag_exit(void);
3235 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3236 struct btrfs_inode
*inode
);
3237 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3238 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3239 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3240 void btrfs_drop_extent_cache(struct btrfs_inode
*inode
, u64 start
, u64 end
,
3242 extern const struct file_operations btrfs_file_operations
;
3243 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3244 struct btrfs_root
*root
, struct inode
*inode
,
3245 struct btrfs_path
*path
, u64 start
, u64 end
,
3246 u64
*drop_end
, int drop_cache
,
3248 u32 extent_item_size
,
3250 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3251 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3252 u64 end
, int drop_cache
);
3253 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3254 struct btrfs_inode
*inode
, u64 start
, u64 end
);
3255 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3256 int btrfs_dirty_pages(struct inode
*inode
, struct page
**pages
,
3257 size_t num_pages
, loff_t pos
, size_t write_bytes
,
3258 struct extent_state
**cached
);
3259 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3260 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
3261 struct file
*file_out
, loff_t pos_out
, u64 len
);
3264 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3265 struct btrfs_root
*root
);
3268 int btrfs_init_sysfs(void);
3269 void btrfs_exit_sysfs(void);
3270 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3271 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3274 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3277 int btrfs_parse_options(struct btrfs_fs_info
*info
, char *options
,
3278 unsigned long new_flags
);
3279 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3281 static inline __printf(2, 3)
3282 void btrfs_no_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3286 #ifdef CONFIG_PRINTK
3288 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3290 #define btrfs_printk(fs_info, fmt, args...) \
3291 btrfs_no_printk(fs_info, fmt, ##args)
3294 #define btrfs_emerg(fs_info, fmt, args...) \
3295 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3296 #define btrfs_alert(fs_info, fmt, args...) \
3297 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3298 #define btrfs_crit(fs_info, fmt, args...) \
3299 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3300 #define btrfs_err(fs_info, fmt, args...) \
3301 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3302 #define btrfs_warn(fs_info, fmt, args...) \
3303 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3304 #define btrfs_notice(fs_info, fmt, args...) \
3305 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3306 #define btrfs_info(fs_info, fmt, args...) \
3307 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3310 * Wrappers that use printk_in_rcu
3312 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3313 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3314 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3315 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3316 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3317 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3318 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3319 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3320 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3321 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3322 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3323 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3324 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3325 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3328 * Wrappers that use a ratelimited printk_in_rcu
3330 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3331 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3332 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3333 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3334 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3335 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3336 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3337 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3338 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3339 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3340 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3341 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3342 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3343 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3346 * Wrappers that use a ratelimited printk
3348 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3349 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3350 #define btrfs_alert_rl(fs_info, fmt, args...) \
3351 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3352 #define btrfs_crit_rl(fs_info, fmt, args...) \
3353 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3354 #define btrfs_err_rl(fs_info, fmt, args...) \
3355 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3356 #define btrfs_warn_rl(fs_info, fmt, args...) \
3357 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3358 #define btrfs_notice_rl(fs_info, fmt, args...) \
3359 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3360 #define btrfs_info_rl(fs_info, fmt, args...) \
3361 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3363 #if defined(CONFIG_DYNAMIC_DEBUG)
3364 #define btrfs_debug(fs_info, fmt, args...) \
3366 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3367 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3368 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3370 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3372 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3373 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3374 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3376 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3378 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3379 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3380 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3383 #define btrfs_debug_rl(fs_info, fmt, args...) \
3385 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3386 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3387 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3390 #elif defined(DEBUG)
3391 #define btrfs_debug(fs_info, fmt, args...) \
3392 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3393 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3394 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3395 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3396 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3397 #define btrfs_debug_rl(fs_info, fmt, args...) \
3398 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3400 #define btrfs_debug(fs_info, fmt, args...) \
3401 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3402 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3403 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3404 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3405 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3406 #define btrfs_debug_rl(fs_info, fmt, args...) \
3407 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3410 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3413 btrfs_printk(fs_info, fmt, ##args); \
3414 rcu_read_unlock(); \
3417 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3419 static DEFINE_RATELIMIT_STATE(_rs, \
3420 DEFAULT_RATELIMIT_INTERVAL, \
3421 DEFAULT_RATELIMIT_BURST); \
3422 if (__ratelimit(&_rs)) \
3423 btrfs_printk(fs_info, fmt, ##args); \
3426 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3429 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3430 rcu_read_unlock(); \
3433 #ifdef CONFIG_BTRFS_ASSERT
3436 static inline void assfail(char *expr
, char *file
, int line
)
3438 pr_err("assertion failed: %s, file: %s, line: %d\n",
3443 #define ASSERT(expr) \
3444 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3446 #define ASSERT(expr) ((void)0)
3451 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3452 unsigned int line
, int errno
, const char *fmt
, ...);
3454 const char *btrfs_decode_error(int errno
);
3457 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3458 const char *function
,
3459 unsigned int line
, int errno
);
3462 * Call btrfs_abort_transaction as early as possible when an error condition is
3463 * detected, that way the exact line number is reported.
3465 #define btrfs_abort_transaction(trans, errno) \
3467 /* Report first abort since mount */ \
3468 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3469 &((trans)->fs_info->fs_state))) { \
3470 if ((errno) != -EIO) { \
3471 WARN(1, KERN_DEBUG \
3472 "BTRFS: Transaction aborted (error %d)\n", \
3475 btrfs_debug((trans)->fs_info, \
3476 "Transaction aborted (error %d)", \
3480 __btrfs_abort_transaction((trans), __func__, \
3481 __LINE__, (errno)); \
3484 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3486 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3487 (errno), fmt, ##args); \
3492 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3493 unsigned int line
, int errno
, const char *fmt
, ...);
3495 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3496 * will panic(). Otherwise we BUG() here.
3498 #define btrfs_panic(fs_info, errno, fmt, args...) \
3500 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3505 /* compatibility and incompatibility defines */
3507 #define btrfs_set_fs_incompat(__fs_info, opt) \
3508 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3510 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3513 struct btrfs_super_block
*disk_super
;
3516 disk_super
= fs_info
->super_copy
;
3517 features
= btrfs_super_incompat_flags(disk_super
);
3518 if (!(features
& flag
)) {
3519 spin_lock(&fs_info
->super_lock
);
3520 features
= btrfs_super_incompat_flags(disk_super
);
3521 if (!(features
& flag
)) {
3523 btrfs_set_super_incompat_flags(disk_super
, features
);
3524 btrfs_info(fs_info
, "setting %llu feature flag",
3527 spin_unlock(&fs_info
->super_lock
);
3531 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3532 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3534 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3537 struct btrfs_super_block
*disk_super
;
3540 disk_super
= fs_info
->super_copy
;
3541 features
= btrfs_super_incompat_flags(disk_super
);
3542 if (features
& flag
) {
3543 spin_lock(&fs_info
->super_lock
);
3544 features
= btrfs_super_incompat_flags(disk_super
);
3545 if (features
& flag
) {
3547 btrfs_set_super_incompat_flags(disk_super
, features
);
3548 btrfs_info(fs_info
, "clearing %llu feature flag",
3551 spin_unlock(&fs_info
->super_lock
);
3555 #define btrfs_fs_incompat(fs_info, opt) \
3556 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3558 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3560 struct btrfs_super_block
*disk_super
;
3561 disk_super
= fs_info
->super_copy
;
3562 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3565 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3566 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3568 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3571 struct btrfs_super_block
*disk_super
;
3574 disk_super
= fs_info
->super_copy
;
3575 features
= btrfs_super_compat_ro_flags(disk_super
);
3576 if (!(features
& flag
)) {
3577 spin_lock(&fs_info
->super_lock
);
3578 features
= btrfs_super_compat_ro_flags(disk_super
);
3579 if (!(features
& flag
)) {
3581 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3582 btrfs_info(fs_info
, "setting %llu ro feature flag",
3585 spin_unlock(&fs_info
->super_lock
);
3589 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3590 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3592 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3595 struct btrfs_super_block
*disk_super
;
3598 disk_super
= fs_info
->super_copy
;
3599 features
= btrfs_super_compat_ro_flags(disk_super
);
3600 if (features
& flag
) {
3601 spin_lock(&fs_info
->super_lock
);
3602 features
= btrfs_super_compat_ro_flags(disk_super
);
3603 if (features
& flag
) {
3605 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3606 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3609 spin_unlock(&fs_info
->super_lock
);
3613 #define btrfs_fs_compat_ro(fs_info, opt) \
3614 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3616 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3618 struct btrfs_super_block
*disk_super
;
3619 disk_super
= fs_info
->super_copy
;
3620 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3624 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3625 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3626 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3627 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3628 struct inode
*inode
, struct inode
*dir
);
3630 #define btrfs_get_acl NULL
3631 #define btrfs_set_acl NULL
3632 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3633 struct inode
*inode
, struct inode
*dir
)
3640 int btrfs_relocate_block_group(struct btrfs_fs_info
*fs_info
, u64 group_start
);
3641 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3642 struct btrfs_root
*root
);
3643 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3644 struct btrfs_root
*root
);
3645 int btrfs_recover_relocation(struct btrfs_root
*root
);
3646 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3647 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3648 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3649 struct extent_buffer
*cow
);
3650 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3651 u64
*bytes_to_reserve
);
3652 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3653 struct btrfs_pending_snapshot
*pending
);
3656 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3657 u64 end
, struct btrfs_scrub_progress
*progress
,
3658 int readonly
, int is_dev_replace
);
3659 void btrfs_scrub_pause(struct btrfs_fs_info
*fs_info
);
3660 void btrfs_scrub_continue(struct btrfs_fs_info
*fs_info
);
3661 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3662 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3663 struct btrfs_device
*dev
);
3664 int btrfs_scrub_progress(struct btrfs_fs_info
*fs_info
, u64 devid
,
3665 struct btrfs_scrub_progress
*progress
);
3666 static inline void btrfs_init_full_stripe_locks_tree(
3667 struct btrfs_full_stripe_locks_tree
*locks_root
)
3669 locks_root
->root
= RB_ROOT
;
3670 mutex_init(&locks_root
->lock
);
3674 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3675 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3676 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3678 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3680 btrfs_bio_counter_sub(fs_info
, 1);
3684 struct reada_control
{
3685 struct btrfs_fs_info
*fs_info
; /* tree to prefetch */
3686 struct btrfs_key key_start
;
3687 struct btrfs_key key_end
; /* exclusive */
3690 wait_queue_head_t wait
;
3692 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3693 struct btrfs_key
*start
, struct btrfs_key
*end
);
3694 int btrfs_reada_wait(void *handle
);
3695 void btrfs_reada_detach(void *handle
);
3696 int btree_readahead_hook(struct extent_buffer
*eb
, int err
);
3698 static inline int is_fstree(u64 rootid
)
3700 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3701 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3702 !btrfs_qgroup_level(rootid
)))
3707 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3709 return signal_pending(current
);
3712 /* Sanity test specific functions */
3713 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3714 void btrfs_test_destroy_inode(struct inode
*inode
);
3717 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3719 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3720 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
,
3721 &fs_info
->fs_state
)))