2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include <linux/btrfs_tree.h>
37 #include <linux/workqueue.h>
38 #include <linux/security.h>
39 #include <linux/sizes.h>
40 #include "extent_io.h"
41 #include "extent_map.h"
42 #include "async-thread.h"
44 struct btrfs_trans_handle
;
45 struct btrfs_transaction
;
46 struct btrfs_pending_snapshot
;
47 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
48 extern struct kmem_cache
*btrfs_transaction_cachep
;
49 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
50 extern struct kmem_cache
*btrfs_path_cachep
;
51 extern struct kmem_cache
*btrfs_free_space_cachep
;
52 struct btrfs_ordered_sum
;
54 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
55 #define STATIC noinline
57 #define STATIC static noinline
60 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
62 #define BTRFS_MAX_MIRRORS 3
64 #define BTRFS_MAX_LEVEL 8
66 #define BTRFS_COMPAT_EXTENT_TREE_V0
69 * the max metadata block size. This limit is somewhat artificial,
70 * but the memmove costs go through the roof for larger blocks.
72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
75 * we can actually store much bigger names, but lets not confuse the rest
78 #define BTRFS_NAME_LEN 255
81 * Theoretical limit is larger, but we keep this down to a sane
82 * value. That should limit greatly the possibility of collisions on
85 #define BTRFS_LINK_MAX 65535U
87 static const int btrfs_csum_sizes
[] = { 4 };
89 /* four bytes for CRC32 */
90 #define BTRFS_EMPTY_DIR_SIZE 0
92 /* specific to btrfs_map_block(), therefore not in include/linux/blk_types.h */
93 #define REQ_GET_READ_MIRRORS (1 << 30)
95 /* ioprio of readahead is set to idle */
96 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
98 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
100 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
102 struct btrfs_mapping_tree
{
103 struct extent_map_tree map_tree
;
106 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
108 BUG_ON(num_stripes
== 0);
109 return sizeof(struct btrfs_chunk
) +
110 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
116 #define BTRFS_FS_STATE_ERROR 0
117 #define BTRFS_FS_STATE_REMOUNTING 1
118 #define BTRFS_FS_STATE_TRANS_ABORTED 2
119 #define BTRFS_FS_STATE_DEV_REPLACING 3
120 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
122 #define BTRFS_BACKREF_REV_MAX 256
123 #define BTRFS_BACKREF_REV_SHIFT 56
124 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
125 BTRFS_BACKREF_REV_SHIFT)
127 #define BTRFS_OLD_BACKREF_REV 0
128 #define BTRFS_MIXED_BACKREF_REV 1
131 * every tree block (leaf or node) starts with this header.
133 struct btrfs_header
{
134 /* these first four must match the super block */
135 u8 csum
[BTRFS_CSUM_SIZE
];
136 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
137 __le64 bytenr
; /* which block this node is supposed to live in */
140 /* allowed to be different from the super from here on down */
141 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
146 } __attribute__ ((__packed__
));
148 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
149 sizeof(struct btrfs_header)) / \
150 sizeof(struct btrfs_key_ptr))
151 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
152 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
153 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
154 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
155 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
156 sizeof(struct btrfs_item) - \
157 BTRFS_FILE_EXTENT_INLINE_DATA_START)
158 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
159 sizeof(struct btrfs_item) -\
160 sizeof(struct btrfs_dir_item))
164 * this is a very generous portion of the super block, giving us
165 * room to translate 14 chunks with 3 stripes each.
167 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
170 * just in case we somehow lose the roots and are not able to mount,
171 * we store an array of the roots from previous transactions
174 #define BTRFS_NUM_BACKUP_ROOTS 4
175 struct btrfs_root_backup
{
177 __le64 tree_root_gen
;
180 __le64 chunk_root_gen
;
183 __le64 extent_root_gen
;
192 __le64 csum_root_gen
;
202 u8 extent_root_level
;
206 /* future and to align */
208 } __attribute__ ((__packed__
));
211 * the super block basically lists the main trees of the FS
212 * it currently lacks any block count etc etc
214 struct btrfs_super_block
{
215 u8 csum
[BTRFS_CSUM_SIZE
];
216 /* the first 4 fields must match struct btrfs_header */
217 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
218 __le64 bytenr
; /* this block number */
221 /* allowed to be different from the btrfs_header from here own down */
228 /* this will help find the new super based on the log root */
229 __le64 log_root_transid
;
232 __le64 root_dir_objectid
;
236 __le32 __unused_leafsize
;
238 __le32 sys_chunk_array_size
;
239 __le64 chunk_root_generation
;
241 __le64 compat_ro_flags
;
242 __le64 incompat_flags
;
247 struct btrfs_dev_item dev_item
;
249 char label
[BTRFS_LABEL_SIZE
];
251 __le64 cache_generation
;
252 __le64 uuid_tree_generation
;
254 /* future expansion */
256 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
257 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
258 } __attribute__ ((__packed__
));
261 * Compat flags that we support. If any incompat flags are set other than the
262 * ones specified below then we will fail to mount
264 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
265 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
266 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
268 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
269 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
271 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
272 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
274 #define BTRFS_FEATURE_INCOMPAT_SUPP \
275 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
276 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
277 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
278 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
279 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
280 BTRFS_FEATURE_INCOMPAT_RAID56 | \
281 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
282 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
283 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
285 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
286 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
287 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
290 * A leaf is full of items. offset and size tell us where to find
291 * the item in the leaf (relative to the start of the data area)
294 struct btrfs_disk_key key
;
297 } __attribute__ ((__packed__
));
300 * leaves have an item area and a data area:
301 * [item0, item1....itemN] [free space] [dataN...data1, data0]
303 * The data is separate from the items to get the keys closer together
307 struct btrfs_header header
;
308 struct btrfs_item items
[];
309 } __attribute__ ((__packed__
));
312 * all non-leaf blocks are nodes, they hold only keys and pointers to
315 struct btrfs_key_ptr
{
316 struct btrfs_disk_key key
;
319 } __attribute__ ((__packed__
));
322 struct btrfs_header header
;
323 struct btrfs_key_ptr ptrs
[];
324 } __attribute__ ((__packed__
));
327 * btrfs_paths remember the path taken from the root down to the leaf.
328 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
329 * to any other levels that are present.
331 * The slots array records the index of the item or block pointer
332 * used while walking the tree.
334 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
336 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
337 int slots
[BTRFS_MAX_LEVEL
];
338 /* if there is real range locking, this locks field will change */
339 u8 locks
[BTRFS_MAX_LEVEL
];
341 /* keep some upper locks as we walk down */
345 * set by btrfs_split_item, tells search_slot to keep all locks
346 * and to force calls to keep space in the nodes
348 unsigned int search_for_split
:1;
349 unsigned int keep_locks
:1;
350 unsigned int skip_locking
:1;
351 unsigned int leave_spinning
:1;
352 unsigned int search_commit_root
:1;
353 unsigned int need_commit_sem
:1;
354 unsigned int skip_release_on_error
:1;
356 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
357 sizeof(struct btrfs_item))
358 struct btrfs_dev_replace
{
359 u64 replace_state
; /* see #define above */
360 u64 time_started
; /* seconds since 1-Jan-1970 */
361 u64 time_stopped
; /* seconds since 1-Jan-1970 */
362 atomic64_t num_write_errors
;
363 atomic64_t num_uncorrectable_read_errors
;
366 u64 committed_cursor_left
;
367 u64 cursor_left_last_write_of_item
;
370 u64 cont_reading_from_srcdev_mode
; /* see #define above */
373 int item_needs_writeback
;
374 struct btrfs_device
*srcdev
;
375 struct btrfs_device
*tgtdev
;
378 atomic_t nesting_level
;
379 struct mutex lock_finishing_cancel_unmount
;
382 atomic_t blocking_readers
;
383 wait_queue_head_t read_lock_wq
;
385 struct btrfs_scrub_progress scrub_progress
;
388 /* For raid type sysfs entries */
389 struct raid_kobject
{
394 struct btrfs_space_info
{
397 u64 total_bytes
; /* total bytes in the space,
398 this doesn't take mirrors into account */
399 u64 bytes_used
; /* total bytes used,
400 this doesn't take mirrors into account */
401 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
402 transaction finishes */
403 u64 bytes_reserved
; /* total bytes the allocator has reserved for
404 current allocations */
405 u64 bytes_may_use
; /* number of bytes that may be used for
406 delalloc/allocations */
407 u64 bytes_readonly
; /* total bytes that are read only */
409 u64 max_extent_size
; /* This will hold the maximum extent size of
410 the space info if we had an ENOSPC in the
413 unsigned int full
:1; /* indicates that we cannot allocate any more
414 chunks for this space */
415 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
417 unsigned int flush
:1; /* set if we are trying to make space */
419 unsigned int force_alloc
; /* set if we need to force a chunk
420 alloc for this space */
422 u64 disk_used
; /* total bytes used on disk */
423 u64 disk_total
; /* total bytes on disk, takes mirrors into
429 * bytes_pinned is kept in line with what is actually pinned, as in
430 * we've called update_block_group and dropped the bytes_used counter
431 * and increased the bytes_pinned counter. However this means that
432 * bytes_pinned does not reflect the bytes that will be pinned once the
433 * delayed refs are flushed, so this counter is inc'ed every time we
434 * call btrfs_free_extent so it is a realtime count of what will be
435 * freed once the transaction is committed. It will be zeroed every
436 * time the transaction commits.
438 struct percpu_counter total_bytes_pinned
;
440 struct list_head list
;
441 /* Protected by the spinlock 'lock'. */
442 struct list_head ro_bgs
;
443 struct list_head priority_tickets
;
444 struct list_head tickets
;
446 struct rw_semaphore groups_sem
;
447 /* for block groups in our same type */
448 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
449 wait_queue_head_t wait
;
452 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
455 #define BTRFS_BLOCK_RSV_GLOBAL 1
456 #define BTRFS_BLOCK_RSV_DELALLOC 2
457 #define BTRFS_BLOCK_RSV_TRANS 3
458 #define BTRFS_BLOCK_RSV_CHUNK 4
459 #define BTRFS_BLOCK_RSV_DELOPS 5
460 #define BTRFS_BLOCK_RSV_EMPTY 6
461 #define BTRFS_BLOCK_RSV_TEMP 7
463 struct btrfs_block_rsv
{
466 struct btrfs_space_info
*space_info
;
470 unsigned short failfast
;
474 * free clusters are used to claim free space in relatively large chunks,
475 * allowing us to do less seeky writes. They are used for all metadata
476 * allocations and data allocations in ssd mode.
478 struct btrfs_free_cluster
{
480 spinlock_t refill_lock
;
483 /* largest extent in this cluster */
486 /* first extent starting offset */
489 /* We did a full search and couldn't create a cluster */
492 struct btrfs_block_group_cache
*block_group
;
494 * when a cluster is allocated from a block group, we put the
495 * cluster onto a list in the block group so that it can
496 * be freed before the block group is freed.
498 struct list_head block_group_list
;
501 enum btrfs_caching_type
{
503 BTRFS_CACHE_STARTED
= 1,
504 BTRFS_CACHE_FAST
= 2,
505 BTRFS_CACHE_FINISHED
= 3,
506 BTRFS_CACHE_ERROR
= 4,
509 enum btrfs_disk_cache_state
{
510 BTRFS_DC_WRITTEN
= 0,
516 struct btrfs_caching_control
{
517 struct list_head list
;
519 wait_queue_head_t wait
;
520 struct btrfs_work work
;
521 struct btrfs_block_group_cache
*block_group
;
526 /* Once caching_thread() finds this much free space, it will wake up waiters. */
527 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
529 struct btrfs_io_ctl
{
533 struct btrfs_root
*root
;
540 unsigned check_crcs
:1;
543 struct btrfs_block_group_cache
{
544 struct btrfs_key key
;
545 struct btrfs_block_group_item item
;
546 struct btrfs_fs_info
*fs_info
;
554 u64 cache_generation
;
558 * If the free space extent count exceeds this number, convert the block
561 u32 bitmap_high_thresh
;
564 * If the free space extent count drops below this number, convert the
565 * block group back to extents.
567 u32 bitmap_low_thresh
;
570 * It is just used for the delayed data space allocation because
571 * only the data space allocation and the relative metadata update
572 * can be done cross the transaction.
574 struct rw_semaphore data_rwsem
;
576 /* for raid56, this is a full stripe, without parity */
577 unsigned long full_stripe_len
;
581 unsigned int has_caching_ctl
:1;
582 unsigned int removed
:1;
584 int disk_cache_state
;
586 /* cache tracking stuff */
588 struct btrfs_caching_control
*caching_ctl
;
589 u64 last_byte_to_unpin
;
591 struct btrfs_space_info
*space_info
;
593 /* free space cache stuff */
594 struct btrfs_free_space_ctl
*free_space_ctl
;
596 /* block group cache stuff */
597 struct rb_node cache_node
;
599 /* for block groups in the same raid type */
600 struct list_head list
;
605 /* List of struct btrfs_free_clusters for this block group.
606 * Today it will only have one thing on it, but that may change
608 struct list_head cluster_list
;
610 /* For delayed block group creation or deletion of empty block groups */
611 struct list_head bg_list
;
613 /* For read-only block groups */
614 struct list_head ro_list
;
618 /* For dirty block groups */
619 struct list_head dirty_list
;
620 struct list_head io_list
;
622 struct btrfs_io_ctl io_ctl
;
625 * Incremented when doing extent allocations and holding a read lock
626 * on the space_info's groups_sem semaphore.
627 * Decremented when an ordered extent that represents an IO against this
628 * block group's range is created (after it's added to its inode's
629 * root's list of ordered extents) or immediately after the allocation
630 * if it's a metadata extent or fallocate extent (for these cases we
631 * don't create ordered extents).
633 atomic_t reservations
;
636 * Incremented while holding the spinlock *lock* by a task checking if
637 * it can perform a nocow write (incremented if the value for the *ro*
638 * field is 0). Decremented by such tasks once they create an ordered
639 * extent or before that if some error happens before reaching that step.
640 * This is to prevent races between block group relocation and nocow
641 * writes through direct IO.
643 atomic_t nocow_writers
;
645 /* Lock for free space tree operations. */
646 struct mutex free_space_lock
;
649 * Does the block group need to be added to the free space tree?
650 * Protected by free_space_lock.
652 int needs_free_space
;
655 /* delayed seq elem */
657 struct list_head list
;
661 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
663 enum btrfs_orphan_cleanup_state
{
664 ORPHAN_CLEANUP_STARTED
= 1,
665 ORPHAN_CLEANUP_DONE
= 2,
668 /* used by the raid56 code to lock stripes for read/modify/write */
669 struct btrfs_stripe_hash
{
670 struct list_head hash_list
;
671 wait_queue_head_t wait
;
675 /* used by the raid56 code to lock stripes for read/modify/write */
676 struct btrfs_stripe_hash_table
{
677 struct list_head stripe_cache
;
678 spinlock_t cache_lock
;
680 struct btrfs_stripe_hash table
[];
683 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
685 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
688 struct reloc_control
;
690 struct btrfs_fs_devices
;
691 struct btrfs_balance_control
;
692 struct btrfs_delayed_root
;
693 struct btrfs_fs_info
{
694 u8 fsid
[BTRFS_FSID_SIZE
];
695 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
696 struct btrfs_root
*extent_root
;
697 struct btrfs_root
*tree_root
;
698 struct btrfs_root
*chunk_root
;
699 struct btrfs_root
*dev_root
;
700 struct btrfs_root
*fs_root
;
701 struct btrfs_root
*csum_root
;
702 struct btrfs_root
*quota_root
;
703 struct btrfs_root
*uuid_root
;
704 struct btrfs_root
*free_space_root
;
706 /* the log root tree is a directory of all the other log roots */
707 struct btrfs_root
*log_root_tree
;
709 spinlock_t fs_roots_radix_lock
;
710 struct radix_tree_root fs_roots_radix
;
712 /* block group cache stuff */
713 spinlock_t block_group_cache_lock
;
714 u64 first_logical_byte
;
715 struct rb_root block_group_cache_tree
;
717 /* keep track of unallocated space */
718 spinlock_t free_chunk_lock
;
719 u64 free_chunk_space
;
721 struct extent_io_tree freed_extents
[2];
722 struct extent_io_tree
*pinned_extents
;
724 /* logical->physical extent mapping */
725 struct btrfs_mapping_tree mapping_tree
;
728 * block reservation for extent, checksum, root tree and
729 * delayed dir index item
731 struct btrfs_block_rsv global_block_rsv
;
732 /* block reservation for delay allocation */
733 struct btrfs_block_rsv delalloc_block_rsv
;
734 /* block reservation for metadata operations */
735 struct btrfs_block_rsv trans_block_rsv
;
736 /* block reservation for chunk tree */
737 struct btrfs_block_rsv chunk_block_rsv
;
738 /* block reservation for delayed operations */
739 struct btrfs_block_rsv delayed_block_rsv
;
741 struct btrfs_block_rsv empty_block_rsv
;
744 u64 last_trans_committed
;
745 u64 avg_delayed_ref_runtime
;
748 * this is updated to the current trans every time a full commit
749 * is required instead of the faster short fsync log commits
751 u64 last_trans_log_full_commit
;
752 unsigned long mount_opt
;
754 * Track requests for actions that need to be done during transaction
755 * commit (like for some mount options).
757 unsigned long pending_changes
;
758 unsigned long compress_type
:4;
761 * It is a suggestive number, the read side is safe even it gets a
762 * wrong number because we will write out the data into a regular
763 * extent. The write side(mount/remount) is under ->s_umount lock,
764 * so it is also safe.
768 * Protected by ->chunk_mutex and sb->s_umount.
770 * The reason that we use two lock to protect it is because only
771 * remount and mount operations can change it and these two operations
772 * are under sb->s_umount, but the read side (chunk allocation) can not
773 * acquire sb->s_umount or the deadlock would happen. So we use two
774 * locks to protect it. On the write side, we must acquire two locks,
775 * and on the read side, we just need acquire one of them.
778 struct btrfs_transaction
*running_transaction
;
779 wait_queue_head_t transaction_throttle
;
780 wait_queue_head_t transaction_wait
;
781 wait_queue_head_t transaction_blocked_wait
;
782 wait_queue_head_t async_submit_wait
;
785 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
786 * when they are updated.
788 * Because we do not clear the flags for ever, so we needn't use
789 * the lock on the read side.
791 * We also needn't use the lock when we mount the fs, because
792 * there is no other task which will update the flag.
794 spinlock_t super_lock
;
795 struct btrfs_super_block
*super_copy
;
796 struct btrfs_super_block
*super_for_commit
;
797 struct block_device
*__bdev
;
798 struct super_block
*sb
;
799 struct inode
*btree_inode
;
800 struct backing_dev_info bdi
;
801 struct mutex tree_log_mutex
;
802 struct mutex transaction_kthread_mutex
;
803 struct mutex cleaner_mutex
;
804 struct mutex chunk_mutex
;
805 struct mutex volume_mutex
;
808 * this is taken to make sure we don't set block groups ro after
809 * the free space cache has been allocated on them
811 struct mutex ro_block_group_mutex
;
813 /* this is used during read/modify/write to make sure
814 * no two ios are trying to mod the same stripe at the same
817 struct btrfs_stripe_hash_table
*stripe_hash_table
;
820 * this protects the ordered operations list only while we are
821 * processing all of the entries on it. This way we make
822 * sure the commit code doesn't find the list temporarily empty
823 * because another function happens to be doing non-waiting preflush
824 * before jumping into the main commit.
826 struct mutex ordered_operations_mutex
;
828 struct rw_semaphore commit_root_sem
;
830 struct rw_semaphore cleanup_work_sem
;
832 struct rw_semaphore subvol_sem
;
833 struct srcu_struct subvol_srcu
;
835 spinlock_t trans_lock
;
837 * the reloc mutex goes with the trans lock, it is taken
838 * during commit to protect us from the relocation code
840 struct mutex reloc_mutex
;
842 struct list_head trans_list
;
843 struct list_head dead_roots
;
844 struct list_head caching_block_groups
;
846 spinlock_t delayed_iput_lock
;
847 struct list_head delayed_iputs
;
848 struct mutex cleaner_delayed_iput_mutex
;
850 /* this protects tree_mod_seq_list */
851 spinlock_t tree_mod_seq_lock
;
852 atomic64_t tree_mod_seq
;
853 struct list_head tree_mod_seq_list
;
855 /* this protects tree_mod_log */
856 rwlock_t tree_mod_log_lock
;
857 struct rb_root tree_mod_log
;
859 atomic_t nr_async_submits
;
860 atomic_t async_submit_draining
;
861 atomic_t nr_async_bios
;
862 atomic_t async_delalloc_pages
;
863 atomic_t open_ioctl_trans
;
866 * this is used to protect the following list -- ordered_roots.
868 spinlock_t ordered_root_lock
;
871 * all fs/file tree roots in which there are data=ordered extents
872 * pending writeback are added into this list.
874 * these can span multiple transactions and basically include
875 * every dirty data page that isn't from nodatacow
877 struct list_head ordered_roots
;
879 struct mutex delalloc_root_mutex
;
880 spinlock_t delalloc_root_lock
;
881 /* all fs/file tree roots that have delalloc inodes. */
882 struct list_head delalloc_roots
;
885 * there is a pool of worker threads for checksumming during writes
886 * and a pool for checksumming after reads. This is because readers
887 * can run with FS locks held, and the writers may be waiting for
888 * those locks. We don't want ordering in the pending list to cause
889 * deadlocks, and so the two are serviced separately.
891 * A third pool does submit_bio to avoid deadlocking with the other
894 struct btrfs_workqueue
*workers
;
895 struct btrfs_workqueue
*delalloc_workers
;
896 struct btrfs_workqueue
*flush_workers
;
897 struct btrfs_workqueue
*endio_workers
;
898 struct btrfs_workqueue
*endio_meta_workers
;
899 struct btrfs_workqueue
*endio_raid56_workers
;
900 struct btrfs_workqueue
*endio_repair_workers
;
901 struct btrfs_workqueue
*rmw_workers
;
902 struct btrfs_workqueue
*endio_meta_write_workers
;
903 struct btrfs_workqueue
*endio_write_workers
;
904 struct btrfs_workqueue
*endio_freespace_worker
;
905 struct btrfs_workqueue
*submit_workers
;
906 struct btrfs_workqueue
*caching_workers
;
907 struct btrfs_workqueue
*readahead_workers
;
910 * fixup workers take dirty pages that didn't properly go through
911 * the cow mechanism and make them safe to write. It happens
912 * for the sys_munmap function call path
914 struct btrfs_workqueue
*fixup_workers
;
915 struct btrfs_workqueue
*delayed_workers
;
917 /* the extent workers do delayed refs on the extent allocation tree */
918 struct btrfs_workqueue
*extent_workers
;
919 struct task_struct
*transaction_kthread
;
920 struct task_struct
*cleaner_kthread
;
921 int thread_pool_size
;
923 struct kobject
*space_info_kobj
;
926 int log_root_recovering
;
931 /* used to keep from writing metadata until there is a nice batch */
932 struct percpu_counter dirty_metadata_bytes
;
933 struct percpu_counter delalloc_bytes
;
934 s32 dirty_metadata_batch
;
937 struct list_head dirty_cowonly_roots
;
939 struct btrfs_fs_devices
*fs_devices
;
942 * the space_info list is almost entirely read only. It only changes
943 * when we add a new raid type to the FS, and that happens
944 * very rarely. RCU is used to protect it.
946 struct list_head space_info
;
948 struct btrfs_space_info
*data_sinfo
;
950 struct reloc_control
*reloc_ctl
;
952 /* data_alloc_cluster is only used in ssd mode */
953 struct btrfs_free_cluster data_alloc_cluster
;
955 /* all metadata allocations go through this cluster */
956 struct btrfs_free_cluster meta_alloc_cluster
;
958 /* auto defrag inodes go here */
959 spinlock_t defrag_inodes_lock
;
960 struct rb_root defrag_inodes
;
961 atomic_t defrag_running
;
963 /* Used to protect avail_{data, metadata, system}_alloc_bits */
964 seqlock_t profiles_lock
;
966 * these three are in extended format (availability of single
967 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
968 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
970 u64 avail_data_alloc_bits
;
971 u64 avail_metadata_alloc_bits
;
972 u64 avail_system_alloc_bits
;
974 /* restriper state */
975 spinlock_t balance_lock
;
976 struct mutex balance_mutex
;
977 atomic_t balance_running
;
978 atomic_t balance_pause_req
;
979 atomic_t balance_cancel_req
;
980 struct btrfs_balance_control
*balance_ctl
;
981 wait_queue_head_t balance_wait_q
;
983 unsigned data_chunk_allocations
;
984 unsigned metadata_ratio
;
988 /* private scrub information */
989 struct mutex scrub_lock
;
990 atomic_t scrubs_running
;
991 atomic_t scrub_pause_req
;
992 atomic_t scrubs_paused
;
993 atomic_t scrub_cancel_req
;
994 wait_queue_head_t scrub_pause_wait
;
995 int scrub_workers_refcnt
;
996 struct btrfs_workqueue
*scrub_workers
;
997 struct btrfs_workqueue
*scrub_wr_completion_workers
;
998 struct btrfs_workqueue
*scrub_nocow_workers
;
999 struct btrfs_workqueue
*scrub_parity_workers
;
1001 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1002 u32 check_integrity_print_mask
;
1007 unsigned int quota_enabled
:1;
1010 * quota_enabled only changes state after a commit. This holds the
1013 unsigned int pending_quota_state
:1;
1015 /* is qgroup tracking in a consistent state? */
1018 /* holds configuration and tracking. Protected by qgroup_lock */
1019 struct rb_root qgroup_tree
;
1020 struct rb_root qgroup_op_tree
;
1021 spinlock_t qgroup_lock
;
1022 spinlock_t qgroup_op_lock
;
1023 atomic_t qgroup_op_seq
;
1026 * used to avoid frequently calling ulist_alloc()/ulist_free()
1027 * when doing qgroup accounting, it must be protected by qgroup_lock.
1029 struct ulist
*qgroup_ulist
;
1031 /* protect user change for quota operations */
1032 struct mutex qgroup_ioctl_lock
;
1034 /* list of dirty qgroups to be written at next commit */
1035 struct list_head dirty_qgroups
;
1037 /* used by qgroup for an efficient tree traversal */
1040 /* qgroup rescan items */
1041 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1042 struct btrfs_key qgroup_rescan_progress
;
1043 struct btrfs_workqueue
*qgroup_rescan_workers
;
1044 struct completion qgroup_rescan_completion
;
1045 struct btrfs_work qgroup_rescan_work
;
1047 /* filesystem state */
1048 unsigned long fs_state
;
1050 struct btrfs_delayed_root
*delayed_root
;
1052 /* readahead tree */
1053 spinlock_t reada_lock
;
1054 struct radix_tree_root reada_tree
;
1056 /* readahead works cnt */
1057 atomic_t reada_works_cnt
;
1059 /* Extent buffer radix tree */
1060 spinlock_t buffer_lock
;
1061 struct radix_tree_root buffer_radix
;
1063 /* next backup root to be overwritten */
1064 int backup_root_index
;
1066 int num_tolerated_disk_barrier_failures
;
1068 /* device replace state */
1069 struct btrfs_dev_replace dev_replace
;
1071 atomic_t mutually_exclusive_operation_running
;
1073 struct percpu_counter bio_counter
;
1074 wait_queue_head_t replace_wait
;
1076 struct semaphore uuid_tree_rescan_sem
;
1077 unsigned int update_uuid_tree_gen
:1;
1079 /* Used to reclaim the metadata space in the background. */
1080 struct work_struct async_reclaim_work
;
1082 spinlock_t unused_bgs_lock
;
1083 struct list_head unused_bgs
;
1084 struct mutex unused_bg_unpin_mutex
;
1085 struct mutex delete_unused_bgs_mutex
;
1087 /* For btrfs to record security options */
1088 struct security_mnt_opts security_opts
;
1091 * Chunks that can't be freed yet (under a trim/discard operation)
1092 * and will be latter freed. Protected by fs_info->chunk_mutex.
1094 struct list_head pinned_chunks
;
1096 int creating_free_space_tree
;
1099 struct btrfs_subvolume_writers
{
1100 struct percpu_counter counter
;
1101 wait_queue_head_t wait
;
1105 * The state of btrfs root
1108 * btrfs_record_root_in_trans is a multi-step process,
1109 * and it can race with the balancing code. But the
1110 * race is very small, and only the first time the root
1111 * is added to each transaction. So IN_TRANS_SETUP
1112 * is used to tell us when more checks are required
1114 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1115 #define BTRFS_ROOT_REF_COWS 1
1116 #define BTRFS_ROOT_TRACK_DIRTY 2
1117 #define BTRFS_ROOT_IN_RADIX 3
1118 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1119 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1120 #define BTRFS_ROOT_FORCE_COW 6
1121 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1122 #define BTRFS_ROOT_DIRTY 8
1125 * in ram representation of the tree. extent_root is used for all allocations
1126 * and for the extent tree extent_root root.
1129 struct extent_buffer
*node
;
1131 struct extent_buffer
*commit_root
;
1132 struct btrfs_root
*log_root
;
1133 struct btrfs_root
*reloc_root
;
1135 unsigned long state
;
1136 struct btrfs_root_item root_item
;
1137 struct btrfs_key root_key
;
1138 struct btrfs_fs_info
*fs_info
;
1139 struct extent_io_tree dirty_log_pages
;
1141 struct mutex objectid_mutex
;
1143 spinlock_t accounting_lock
;
1144 struct btrfs_block_rsv
*block_rsv
;
1146 /* free ino cache stuff */
1147 struct btrfs_free_space_ctl
*free_ino_ctl
;
1148 enum btrfs_caching_type ino_cache_state
;
1149 spinlock_t ino_cache_lock
;
1150 wait_queue_head_t ino_cache_wait
;
1151 struct btrfs_free_space_ctl
*free_ino_pinned
;
1152 u64 ino_cache_progress
;
1153 struct inode
*ino_cache_inode
;
1155 struct mutex log_mutex
;
1156 wait_queue_head_t log_writer_wait
;
1157 wait_queue_head_t log_commit_wait
[2];
1158 struct list_head log_ctxs
[2];
1159 atomic_t log_writers
;
1160 atomic_t log_commit
[2];
1163 /* No matter the commit succeeds or not*/
1164 int log_transid_committed
;
1165 /* Just be updated when the commit succeeds. */
1166 int last_log_commit
;
1167 pid_t log_start_pid
;
1172 /* data allocations are done in sectorsize units */
1175 /* node allocations are done in nodesize units */
1182 u64 highest_objectid
;
1184 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1185 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1189 u64 defrag_trans_start
;
1190 struct btrfs_key defrag_progress
;
1191 struct btrfs_key defrag_max
;
1194 /* the dirty list is only used by non-reference counted roots */
1195 struct list_head dirty_list
;
1197 struct list_head root_list
;
1199 spinlock_t log_extents_lock
[2];
1200 struct list_head logged_list
[2];
1202 spinlock_t orphan_lock
;
1203 atomic_t orphan_inodes
;
1204 struct btrfs_block_rsv
*orphan_block_rsv
;
1205 int orphan_cleanup_state
;
1207 spinlock_t inode_lock
;
1208 /* red-black tree that keeps track of in-memory inodes */
1209 struct rb_root inode_tree
;
1212 * radix tree that keeps track of delayed nodes of every inode,
1213 * protected by inode_lock
1215 struct radix_tree_root delayed_nodes_tree
;
1217 * right now this just gets used so that a root has its own devid
1218 * for stat. It may be used for more later
1222 spinlock_t root_item_lock
;
1225 struct mutex delalloc_mutex
;
1226 spinlock_t delalloc_lock
;
1228 * all of the inodes that have delalloc bytes. It is possible for
1229 * this list to be empty even when there is still dirty data=ordered
1230 * extents waiting to finish IO.
1232 struct list_head delalloc_inodes
;
1233 struct list_head delalloc_root
;
1234 u64 nr_delalloc_inodes
;
1236 struct mutex ordered_extent_mutex
;
1238 * this is used by the balancing code to wait for all the pending
1241 spinlock_t ordered_extent_lock
;
1244 * all of the data=ordered extents pending writeback
1245 * these can span multiple transactions and basically include
1246 * every dirty data page that isn't from nodatacow
1248 struct list_head ordered_extents
;
1249 struct list_head ordered_root
;
1250 u64 nr_ordered_extents
;
1253 * Number of currently running SEND ioctls to prevent
1254 * manipulation with the read-only status via SUBVOL_SETFLAGS
1256 int send_in_progress
;
1257 struct btrfs_subvolume_writers
*subv_writers
;
1258 atomic_t will_be_snapshoted
;
1260 /* For qgroup metadata space reserve */
1261 atomic_t qgroup_meta_rsv
;
1265 * Flags for mount options.
1267 * Note: don't forget to add new options to btrfs_show_options()
1269 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1270 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1271 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1272 #define BTRFS_MOUNT_SSD (1 << 3)
1273 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1274 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1275 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1276 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1277 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1278 #define BTRFS_MOUNT_NOSSD (1 << 9)
1279 #define BTRFS_MOUNT_DISCARD (1 << 10)
1280 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1281 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1282 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1283 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1284 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1285 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1286 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1287 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1288 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1289 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1290 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1291 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1292 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1293 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1294 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1295 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1296 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1298 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1299 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1301 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1302 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1303 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1304 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1307 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1309 if (!btrfs_test_opt(fs_info, opt)) \
1310 btrfs_info(fs_info, fmt, ##args); \
1311 btrfs_set_opt(fs_info->mount_opt, opt); \
1314 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1316 if (btrfs_test_opt(fs_info, opt)) \
1317 btrfs_info(fs_info, fmt, ##args); \
1318 btrfs_clear_opt(fs_info->mount_opt, opt); \
1321 #ifdef CONFIG_BTRFS_DEBUG
1323 btrfs_should_fragment_free_space(struct btrfs_root
*root
,
1324 struct btrfs_block_group_cache
*block_group
)
1326 return (btrfs_test_opt(root
->fs_info
, FRAGMENT_METADATA
) &&
1327 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1328 (btrfs_test_opt(root
->fs_info
, FRAGMENT_DATA
) &&
1329 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1334 * Requests for changes that need to be done during transaction commit.
1336 * Internal mount options that are used for special handling of the real
1337 * mount options (eg. cannot be set during remount and have to be set during
1338 * transaction commit)
1341 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1342 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1343 #define BTRFS_PENDING_COMMIT (2)
1345 #define btrfs_test_pending(info, opt) \
1346 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1347 #define btrfs_set_pending(info, opt) \
1348 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1349 #define btrfs_clear_pending(info, opt) \
1350 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1353 * Helpers for setting pending mount option changes.
1355 * Expects corresponding macros
1356 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1358 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1360 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1361 btrfs_info((info), fmt, ##args); \
1362 btrfs_set_pending((info), SET_##opt); \
1363 btrfs_clear_pending((info), CLEAR_##opt); \
1367 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1369 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1370 btrfs_info((info), fmt, ##args); \
1371 btrfs_set_pending((info), CLEAR_##opt); \
1372 btrfs_clear_pending((info), SET_##opt); \
1379 #define BTRFS_INODE_NODATASUM (1 << 0)
1380 #define BTRFS_INODE_NODATACOW (1 << 1)
1381 #define BTRFS_INODE_READONLY (1 << 2)
1382 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1383 #define BTRFS_INODE_PREALLOC (1 << 4)
1384 #define BTRFS_INODE_SYNC (1 << 5)
1385 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1386 #define BTRFS_INODE_APPEND (1 << 7)
1387 #define BTRFS_INODE_NODUMP (1 << 8)
1388 #define BTRFS_INODE_NOATIME (1 << 9)
1389 #define BTRFS_INODE_DIRSYNC (1 << 10)
1390 #define BTRFS_INODE_COMPRESS (1 << 11)
1392 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1394 struct btrfs_map_token
{
1395 struct extent_buffer
*eb
;
1397 unsigned long offset
;
1400 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1401 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1403 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1405 token
->kaddr
= NULL
;
1408 /* some macros to generate set/get functions for the struct fields. This
1409 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1412 #define le8_to_cpu(v) (v)
1413 #define cpu_to_le8(v) (v)
1416 #define read_eb_member(eb, ptr, type, member, result) ( \
1417 read_extent_buffer(eb, (char *)(result), \
1418 ((unsigned long)(ptr)) + \
1419 offsetof(type, member), \
1420 sizeof(((type *)0)->member)))
1422 #define write_eb_member(eb, ptr, type, member, result) ( \
1423 write_extent_buffer(eb, (char *)(result), \
1424 ((unsigned long)(ptr)) + \
1425 offsetof(type, member), \
1426 sizeof(((type *)0)->member)))
1428 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1429 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1430 unsigned long off, \
1431 struct btrfs_map_token *token); \
1432 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1433 unsigned long off, u##bits val, \
1434 struct btrfs_map_token *token); \
1435 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1436 unsigned long off) \
1438 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1440 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1441 unsigned long off, u##bits val) \
1443 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1446 DECLARE_BTRFS_SETGET_BITS(8)
1447 DECLARE_BTRFS_SETGET_BITS(16)
1448 DECLARE_BTRFS_SETGET_BITS(32)
1449 DECLARE_BTRFS_SETGET_BITS(64)
1451 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1452 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1454 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1455 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1457 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1460 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1461 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1463 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1464 struct btrfs_map_token *token) \
1466 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1467 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1469 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1470 type *s, u##bits val, \
1471 struct btrfs_map_token *token) \
1473 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1474 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1477 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1478 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1480 type *p = page_address(eb->pages[0]); \
1481 u##bits res = le##bits##_to_cpu(p->member); \
1484 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1487 type *p = page_address(eb->pages[0]); \
1488 p->member = cpu_to_le##bits(val); \
1491 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1492 static inline u##bits btrfs_##name(type *s) \
1494 return le##bits##_to_cpu(s->member); \
1496 static inline void btrfs_set_##name(type *s, u##bits val) \
1498 s->member = cpu_to_le##bits(val); \
1501 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1502 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1503 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1504 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1505 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1506 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1508 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1509 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1510 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1511 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1512 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1513 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1515 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1516 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1518 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1520 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1522 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1524 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1526 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1527 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1529 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1531 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1533 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1536 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1538 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1541 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1543 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1546 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1547 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1548 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1549 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1550 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1551 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1552 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1553 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1554 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1555 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1556 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1558 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1560 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1563 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1564 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1565 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1567 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1569 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1571 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1573 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1574 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1576 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1578 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1579 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1581 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1584 unsigned long offset
= (unsigned long)c
;
1585 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1586 offset
+= nr
* sizeof(struct btrfs_stripe
);
1587 return (struct btrfs_stripe
*)offset
;
1590 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1592 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1595 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1596 struct btrfs_chunk
*c
, int nr
)
1598 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1601 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1602 struct btrfs_chunk
*c
, int nr
)
1604 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1607 /* struct btrfs_block_group_item */
1608 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1610 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1612 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1613 struct btrfs_block_group_item
, chunk_objectid
, 64);
1615 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1616 struct btrfs_block_group_item
, chunk_objectid
, 64);
1617 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1618 struct btrfs_block_group_item
, flags
, 64);
1619 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1620 struct btrfs_block_group_item
, flags
, 64);
1622 /* struct btrfs_free_space_info */
1623 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1625 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1627 /* struct btrfs_inode_ref */
1628 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1629 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1631 /* struct btrfs_inode_extref */
1632 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1633 parent_objectid
, 64);
1634 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1636 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1638 /* struct btrfs_inode_item */
1639 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1640 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1641 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1642 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1643 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1644 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1645 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1646 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1647 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1648 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1649 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1650 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1651 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1653 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1655 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1657 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1658 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1660 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1662 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1663 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1664 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1665 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1666 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1667 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1668 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1669 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1670 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1671 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1673 /* struct btrfs_dev_extent */
1674 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1676 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1677 chunk_objectid
, 64);
1678 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1680 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1682 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1684 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1685 return (unsigned long)dev
+ ptr
;
1688 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1689 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1691 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1693 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1696 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1698 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1699 struct btrfs_tree_block_info
*item
,
1700 struct btrfs_disk_key
*key
)
1702 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1705 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1706 struct btrfs_tree_block_info
*item
,
1707 struct btrfs_disk_key
*key
)
1709 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1712 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1714 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1716 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1718 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1721 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1724 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1726 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1729 static inline u32
btrfs_extent_inline_ref_size(int type
)
1731 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1732 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1733 return sizeof(struct btrfs_extent_inline_ref
);
1734 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1735 return sizeof(struct btrfs_shared_data_ref
) +
1736 sizeof(struct btrfs_extent_inline_ref
);
1737 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1738 return sizeof(struct btrfs_extent_data_ref
) +
1739 offsetof(struct btrfs_extent_inline_ref
, offset
);
1744 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1745 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1747 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1748 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1750 /* struct btrfs_node */
1751 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1752 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1753 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1755 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1758 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1761 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1762 sizeof(struct btrfs_key_ptr
) * nr
;
1763 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1766 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1770 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1771 sizeof(struct btrfs_key_ptr
) * nr
;
1772 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1775 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1778 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1779 sizeof(struct btrfs_key_ptr
) * nr
;
1780 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1783 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1787 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1788 sizeof(struct btrfs_key_ptr
) * nr
;
1789 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1792 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1794 return offsetof(struct btrfs_node
, ptrs
) +
1795 sizeof(struct btrfs_key_ptr
) * nr
;
1798 void btrfs_node_key(struct extent_buffer
*eb
,
1799 struct btrfs_disk_key
*disk_key
, int nr
);
1801 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1802 struct btrfs_disk_key
*disk_key
, int nr
)
1805 ptr
= btrfs_node_key_ptr_offset(nr
);
1806 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1807 struct btrfs_key_ptr
, key
, disk_key
);
1810 /* struct btrfs_item */
1811 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1812 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1813 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1814 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1816 static inline unsigned long btrfs_item_nr_offset(int nr
)
1818 return offsetof(struct btrfs_leaf
, items
) +
1819 sizeof(struct btrfs_item
) * nr
;
1822 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1824 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1827 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1828 struct btrfs_item
*item
)
1830 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1833 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1835 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1838 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1840 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1843 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1845 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1848 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1849 struct btrfs_disk_key
*disk_key
, int nr
)
1851 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1852 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1855 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1856 struct btrfs_disk_key
*disk_key
, int nr
)
1858 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1859 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1862 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1865 * struct btrfs_root_ref
1867 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1868 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1869 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1871 /* struct btrfs_dir_item */
1872 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1873 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1874 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1875 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1876 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1877 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1879 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1881 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1884 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1885 struct btrfs_dir_item
*item
,
1886 struct btrfs_disk_key
*key
)
1888 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1891 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1892 struct btrfs_dir_item
*item
,
1893 struct btrfs_disk_key
*key
)
1895 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1898 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1900 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1902 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1905 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1906 struct btrfs_free_space_header
*h
,
1907 struct btrfs_disk_key
*key
)
1909 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1912 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1913 struct btrfs_free_space_header
*h
,
1914 struct btrfs_disk_key
*key
)
1916 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1919 /* struct btrfs_disk_key */
1920 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1922 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1923 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1925 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1926 struct btrfs_disk_key
*disk
)
1928 cpu
->offset
= le64_to_cpu(disk
->offset
);
1929 cpu
->type
= disk
->type
;
1930 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1933 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1934 struct btrfs_key
*cpu
)
1936 disk
->offset
= cpu_to_le64(cpu
->offset
);
1937 disk
->type
= cpu
->type
;
1938 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1941 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1942 struct btrfs_key
*key
, int nr
)
1944 struct btrfs_disk_key disk_key
;
1945 btrfs_node_key(eb
, &disk_key
, nr
);
1946 btrfs_disk_key_to_cpu(key
, &disk_key
);
1949 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1950 struct btrfs_key
*key
, int nr
)
1952 struct btrfs_disk_key disk_key
;
1953 btrfs_item_key(eb
, &disk_key
, nr
);
1954 btrfs_disk_key_to_cpu(key
, &disk_key
);
1957 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1958 struct btrfs_dir_item
*item
,
1959 struct btrfs_key
*key
)
1961 struct btrfs_disk_key disk_key
;
1962 btrfs_dir_item_key(eb
, item
, &disk_key
);
1963 btrfs_disk_key_to_cpu(key
, &disk_key
);
1967 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1972 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1977 /* struct btrfs_header */
1978 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1979 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1981 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1982 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1983 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1984 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1985 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1987 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1988 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
1990 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1992 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1994 return (btrfs_header_flags(eb
) & flag
) == flag
;
1997 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1999 u64 flags
= btrfs_header_flags(eb
);
2000 btrfs_set_header_flags(eb
, flags
| flag
);
2001 return (flags
& flag
) == flag
;
2004 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2006 u64 flags
= btrfs_header_flags(eb
);
2007 btrfs_set_header_flags(eb
, flags
& ~flag
);
2008 return (flags
& flag
) == flag
;
2011 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2013 u64 flags
= btrfs_header_flags(eb
);
2014 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2017 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2020 u64 flags
= btrfs_header_flags(eb
);
2021 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2022 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2023 btrfs_set_header_flags(eb
, flags
);
2026 static inline unsigned long btrfs_header_fsid(void)
2028 return offsetof(struct btrfs_header
, fsid
);
2031 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2033 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2036 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2038 return btrfs_header_level(eb
) == 0;
2041 /* struct btrfs_root_item */
2042 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2044 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2045 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2046 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2048 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2050 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2051 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2052 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2053 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2054 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2055 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2056 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2057 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2059 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2061 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2063 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2065 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2067 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2070 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2072 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2075 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2077 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2080 /* struct btrfs_root_backup */
2081 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2083 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2085 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2086 tree_root_level
, 8);
2088 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2090 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2091 chunk_root_gen
, 64);
2092 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2093 chunk_root_level
, 8);
2095 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2097 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2098 extent_root_gen
, 64);
2099 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2100 extent_root_level
, 8);
2102 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2104 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2106 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2109 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2111 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2113 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2116 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2118 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2120 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2121 csum_root_level
, 8);
2122 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2124 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2126 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2129 /* struct btrfs_balance_item */
2130 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2132 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2133 struct btrfs_balance_item
*bi
,
2134 struct btrfs_disk_balance_args
*ba
)
2136 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2139 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2140 struct btrfs_balance_item
*bi
,
2141 struct btrfs_disk_balance_args
*ba
)
2143 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2146 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2147 struct btrfs_balance_item
*bi
,
2148 struct btrfs_disk_balance_args
*ba
)
2150 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2153 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2154 struct btrfs_balance_item
*bi
,
2155 struct btrfs_disk_balance_args
*ba
)
2157 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2160 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2161 struct btrfs_balance_item
*bi
,
2162 struct btrfs_disk_balance_args
*ba
)
2164 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2167 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2168 struct btrfs_balance_item
*bi
,
2169 struct btrfs_disk_balance_args
*ba
)
2171 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2175 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2176 struct btrfs_disk_balance_args
*disk
)
2178 memset(cpu
, 0, sizeof(*cpu
));
2180 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2181 cpu
->usage
= le64_to_cpu(disk
->usage
);
2182 cpu
->devid
= le64_to_cpu(disk
->devid
);
2183 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2184 cpu
->pend
= le64_to_cpu(disk
->pend
);
2185 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2186 cpu
->vend
= le64_to_cpu(disk
->vend
);
2187 cpu
->target
= le64_to_cpu(disk
->target
);
2188 cpu
->flags
= le64_to_cpu(disk
->flags
);
2189 cpu
->limit
= le64_to_cpu(disk
->limit
);
2193 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2194 struct btrfs_balance_args
*cpu
)
2196 memset(disk
, 0, sizeof(*disk
));
2198 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2199 disk
->usage
= cpu_to_le64(cpu
->usage
);
2200 disk
->devid
= cpu_to_le64(cpu
->devid
);
2201 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2202 disk
->pend
= cpu_to_le64(cpu
->pend
);
2203 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2204 disk
->vend
= cpu_to_le64(cpu
->vend
);
2205 disk
->target
= cpu_to_le64(cpu
->target
);
2206 disk
->flags
= cpu_to_le64(cpu
->flags
);
2207 disk
->limit
= cpu_to_le64(cpu
->limit
);
2210 /* struct btrfs_super_block */
2211 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2212 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2213 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2215 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2216 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2217 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2218 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2219 struct btrfs_super_block
, chunk_root_generation
, 64);
2220 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2222 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2224 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2225 chunk_root_level
, 8);
2226 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2228 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2229 log_root_transid
, 64);
2230 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2232 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2234 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2236 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2238 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2240 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2242 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2243 root_dir_objectid
, 64);
2244 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2246 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2248 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2249 compat_ro_flags
, 64);
2250 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2251 incompat_flags
, 64);
2252 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2254 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2255 cache_generation
, 64);
2256 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2257 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2258 uuid_tree_generation
, 64);
2260 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2262 u16 t
= btrfs_super_csum_type(s
);
2264 * csum type is validated at mount time
2266 return btrfs_csum_sizes
[t
];
2269 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2271 return offsetof(struct btrfs_leaf
, items
);
2274 /* struct btrfs_file_extent_item */
2275 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2276 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2277 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2278 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2279 struct btrfs_file_extent_item
, offset
, 64);
2280 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2281 struct btrfs_file_extent_item
, generation
, 64);
2282 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2283 struct btrfs_file_extent_item
, num_bytes
, 64);
2284 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2285 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2286 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2287 struct btrfs_file_extent_item
, compression
, 8);
2289 static inline unsigned long
2290 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2292 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2295 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2297 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2300 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2302 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2304 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2305 disk_num_bytes
, 64);
2306 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2308 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2310 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2312 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2314 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2316 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2317 other_encoding
, 16);
2320 * this returns the number of bytes used by the item on disk, minus the
2321 * size of any extent headers. If a file is compressed on disk, this is
2322 * the compressed size
2324 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2325 struct btrfs_item
*e
)
2327 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2330 /* this returns the number of file bytes represented by the inline item.
2331 * If an item is compressed, this is the uncompressed size
2333 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2335 struct btrfs_file_extent_item
*fi
)
2337 struct btrfs_map_token token
;
2339 btrfs_init_map_token(&token
);
2341 * return the space used on disk if this item isn't
2342 * compressed or encoded
2344 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
2345 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
2346 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
2347 return btrfs_file_extent_inline_item_len(eb
,
2348 btrfs_item_nr(slot
));
2351 /* otherwise use the ram bytes field */
2352 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
2356 /* btrfs_dev_stats_item */
2357 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2358 struct btrfs_dev_stats_item
*ptr
,
2363 read_extent_buffer(eb
, &val
,
2364 offsetof(struct btrfs_dev_stats_item
, values
) +
2365 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2370 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2371 struct btrfs_dev_stats_item
*ptr
,
2374 write_extent_buffer(eb
, &val
,
2375 offsetof(struct btrfs_dev_stats_item
, values
) +
2376 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2380 /* btrfs_qgroup_status_item */
2381 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2383 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2385 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2387 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2390 /* btrfs_qgroup_info_item */
2391 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2393 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2394 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2396 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2397 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2400 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2401 struct btrfs_qgroup_info_item
, generation
, 64);
2402 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2404 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2405 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2406 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2408 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2409 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2411 /* btrfs_qgroup_limit_item */
2412 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2414 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2416 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2418 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2420 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2423 /* btrfs_dev_replace_item */
2424 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2425 struct btrfs_dev_replace_item
, src_devid
, 64);
2426 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2427 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2429 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2431 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2433 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2435 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2436 num_write_errors
, 64);
2437 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2438 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2440 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2442 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2445 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2446 struct btrfs_dev_replace_item
, src_devid
, 64);
2447 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2448 struct btrfs_dev_replace_item
,
2449 cont_reading_from_srcdev_mode
, 64);
2450 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2451 struct btrfs_dev_replace_item
, replace_state
, 64);
2452 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2453 struct btrfs_dev_replace_item
, time_started
, 64);
2454 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2455 struct btrfs_dev_replace_item
, time_stopped
, 64);
2456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2457 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2458 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2459 struct btrfs_dev_replace_item
,
2460 num_uncorrectable_read_errors
, 64);
2461 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2462 struct btrfs_dev_replace_item
, cursor_left
, 64);
2463 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2464 struct btrfs_dev_replace_item
, cursor_right
, 64);
2466 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2468 return sb
->s_fs_info
;
2471 /* helper function to cast into the data area of the leaf. */
2472 #define btrfs_item_ptr(leaf, slot, type) \
2473 ((type *)(btrfs_leaf_data(leaf) + \
2474 btrfs_item_offset_nr(leaf, slot)))
2476 #define btrfs_item_ptr_offset(leaf, slot) \
2477 ((unsigned long)(btrfs_leaf_data(leaf) + \
2478 btrfs_item_offset_nr(leaf, slot)))
2480 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2482 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2483 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2486 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2488 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2493 u64
btrfs_csum_bytes_to_leaves(struct btrfs_root
*root
, u64 csum_bytes
);
2495 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2498 return root
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2502 * Doing a truncate won't result in new nodes or leaves, just what we need for
2505 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2508 return root
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2511 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
2512 struct btrfs_root
*root
);
2513 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
2514 struct btrfs_root
*root
);
2515 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2517 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2518 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2519 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2520 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2521 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2522 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2523 struct btrfs_root
*root
, unsigned long count
);
2524 int btrfs_async_run_delayed_refs(struct btrfs_root
*root
,
2525 unsigned long count
, u64 transid
, int wait
);
2526 int btrfs_lookup_data_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2527 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2528 struct btrfs_root
*root
, u64 bytenr
,
2529 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2530 int btrfs_pin_extent(struct btrfs_root
*root
,
2531 u64 bytenr
, u64 num
, int reserved
);
2532 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
2533 u64 bytenr
, u64 num_bytes
);
2534 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
2535 struct extent_buffer
*eb
);
2536 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2537 struct btrfs_root
*root
,
2538 u64 objectid
, u64 offset
, u64 bytenr
);
2539 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2540 struct btrfs_fs_info
*info
,
2542 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2543 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2544 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
2545 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2546 struct btrfs_root
*root
, u64 parent
,
2548 struct btrfs_disk_key
*key
, int level
,
2549 u64 hint
, u64 empty_size
);
2550 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2551 struct btrfs_root
*root
,
2552 struct extent_buffer
*buf
,
2553 u64 parent
, int last_ref
);
2554 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2555 struct btrfs_root
*root
,
2556 u64 root_objectid
, u64 owner
,
2557 u64 offset
, u64 ram_bytes
,
2558 struct btrfs_key
*ins
);
2559 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2560 struct btrfs_root
*root
,
2561 u64 root_objectid
, u64 owner
, u64 offset
,
2562 struct btrfs_key
*ins
);
2563 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
2564 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2565 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2566 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2567 struct extent_buffer
*buf
, int full_backref
);
2568 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2569 struct extent_buffer
*buf
, int full_backref
);
2570 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2571 struct btrfs_root
*root
,
2572 u64 bytenr
, u64 num_bytes
, u64 flags
,
2573 int level
, int is_data
);
2574 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2575 struct btrfs_root
*root
,
2576 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2577 u64 owner
, u64 offset
);
2579 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
,
2581 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2582 u64 start
, u64 len
);
2583 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2584 struct btrfs_root
*root
);
2585 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2586 struct btrfs_root
*root
);
2587 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2588 struct btrfs_root
*root
,
2589 u64 bytenr
, u64 num_bytes
, u64 parent
,
2590 u64 root_objectid
, u64 owner
, u64 offset
);
2592 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2593 struct btrfs_root
*root
);
2594 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2595 struct btrfs_root
*root
);
2596 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2597 struct btrfs_root
*root
);
2598 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2599 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2600 int btrfs_read_block_groups(struct btrfs_root
*root
);
2601 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2602 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2603 struct btrfs_root
*root
, u64 bytes_used
,
2604 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2606 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2607 struct btrfs_fs_info
*fs_info
,
2608 const u64 chunk_offset
);
2609 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2610 struct btrfs_root
*root
, u64 group_start
,
2611 struct extent_map
*em
);
2612 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2613 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2614 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2615 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
2616 struct btrfs_root
*root
);
2617 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2618 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2620 enum btrfs_reserve_flush_enum
{
2621 /* If we are in the transaction, we can't flush anything.*/
2622 BTRFS_RESERVE_NO_FLUSH
,
2624 * Flushing delalloc may cause deadlock somewhere, in this
2625 * case, use FLUSH LIMIT
2627 BTRFS_RESERVE_FLUSH_LIMIT
,
2628 BTRFS_RESERVE_FLUSH_ALL
,
2631 enum btrfs_flush_state
{
2632 FLUSH_DELAYED_ITEMS_NR
= 1,
2633 FLUSH_DELAYED_ITEMS
= 2,
2635 FLUSH_DELALLOC_WAIT
= 4,
2640 int btrfs_check_data_free_space(struct inode
*inode
, u64 start
, u64 len
);
2641 int btrfs_alloc_data_chunk_ondemand(struct inode
*inode
, u64 bytes
);
2642 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 start
, u64 len
);
2643 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2645 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2646 struct btrfs_root
*root
);
2647 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2648 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2649 struct inode
*inode
);
2650 void btrfs_orphan_release_metadata(struct inode
*inode
);
2651 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2652 struct btrfs_block_rsv
*rsv
,
2654 u64
*qgroup_reserved
, bool use_global_rsv
);
2655 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
2656 struct btrfs_block_rsv
*rsv
,
2657 u64 qgroup_reserved
);
2658 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2659 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2660 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 start
, u64 len
);
2661 void btrfs_delalloc_release_space(struct inode
*inode
, u64 start
, u64 len
);
2662 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2663 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
2664 unsigned short type
);
2665 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2666 struct btrfs_block_rsv
*rsv
);
2667 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
2668 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2669 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2670 enum btrfs_reserve_flush_enum flush
);
2671 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2672 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2673 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2674 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2675 enum btrfs_reserve_flush_enum flush
);
2676 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2677 struct btrfs_block_rsv
*dst_rsv
, u64 num_bytes
,
2679 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2680 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2682 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2683 struct btrfs_block_rsv
*block_rsv
,
2685 int btrfs_inc_block_group_ro(struct btrfs_root
*root
,
2686 struct btrfs_block_group_cache
*cache
);
2687 void btrfs_dec_block_group_ro(struct btrfs_root
*root
,
2688 struct btrfs_block_group_cache
*cache
);
2689 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2690 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2691 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2692 u64 start
, u64 end
);
2693 int btrfs_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2694 u64 num_bytes
, u64
*actual_bytes
);
2695 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2696 struct btrfs_root
*root
, u64 type
);
2697 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2699 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2700 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2701 struct btrfs_fs_info
*fs_info
);
2702 int __get_raid_index(u64 flags
);
2703 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
2704 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
2705 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2706 void check_system_chunk(struct btrfs_trans_handle
*trans
,
2707 struct btrfs_root
*root
,
2709 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2710 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2713 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2714 int level
, int *slot
);
2715 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2716 int btrfs_previous_item(struct btrfs_root
*root
,
2717 struct btrfs_path
*path
, u64 min_objectid
,
2719 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2720 struct btrfs_path
*path
, u64 min_objectid
);
2721 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2722 struct btrfs_path
*path
,
2723 struct btrfs_key
*new_key
);
2724 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2725 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2726 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2727 struct btrfs_key
*key
, int lowest_level
,
2729 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2730 struct btrfs_path
*path
,
2732 enum btrfs_compare_tree_result
{
2733 BTRFS_COMPARE_TREE_NEW
,
2734 BTRFS_COMPARE_TREE_DELETED
,
2735 BTRFS_COMPARE_TREE_CHANGED
,
2736 BTRFS_COMPARE_TREE_SAME
,
2738 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2739 struct btrfs_root
*right_root
,
2740 struct btrfs_path
*left_path
,
2741 struct btrfs_path
*right_path
,
2742 struct btrfs_key
*key
,
2743 enum btrfs_compare_tree_result result
,
2745 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2746 struct btrfs_root
*right_root
,
2747 btrfs_changed_cb_t cb
, void *ctx
);
2748 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2749 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2750 struct extent_buffer
*parent
, int parent_slot
,
2751 struct extent_buffer
**cow_ret
);
2752 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2753 struct btrfs_root
*root
,
2754 struct extent_buffer
*buf
,
2755 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2756 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2757 struct extent_buffer
*buf
);
2758 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2760 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2761 u32 new_size
, int from_end
);
2762 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2763 struct btrfs_root
*root
,
2764 struct btrfs_path
*path
,
2765 struct btrfs_key
*new_key
,
2766 unsigned long split_offset
);
2767 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2768 struct btrfs_root
*root
,
2769 struct btrfs_path
*path
,
2770 struct btrfs_key
*new_key
);
2771 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2772 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2773 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2774 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2776 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
2777 struct btrfs_path
*p
, u64 time_seq
);
2778 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2779 struct btrfs_key
*key
, struct btrfs_path
*p
,
2780 int find_higher
, int return_any
);
2781 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2782 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2783 int start_slot
, u64
*last_ret
,
2784 struct btrfs_key
*progress
);
2785 void btrfs_release_path(struct btrfs_path
*p
);
2786 struct btrfs_path
*btrfs_alloc_path(void);
2787 void btrfs_free_path(struct btrfs_path
*p
);
2788 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2789 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2790 struct extent_buffer
*held
, int held_rw
);
2791 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2793 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2794 struct btrfs_path
*path
, int slot
, int nr
);
2795 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2796 struct btrfs_root
*root
,
2797 struct btrfs_path
*path
)
2799 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2802 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2803 struct btrfs_key
*cpu_key
, u32
*data_size
,
2804 u32 total_data
, u32 total_size
, int nr
);
2805 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2806 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2807 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2808 struct btrfs_root
*root
,
2809 struct btrfs_path
*path
,
2810 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2812 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2813 struct btrfs_root
*root
,
2814 struct btrfs_path
*path
,
2815 struct btrfs_key
*key
,
2818 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2821 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2822 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2823 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2825 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2826 struct btrfs_path
*p
, u64 time_seq
)
2829 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2830 return btrfs_next_old_leaf(root
, p
, time_seq
);
2833 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2835 return btrfs_next_old_item(root
, p
, 0);
2837 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2838 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2839 struct btrfs_block_rsv
*block_rsv
,
2840 int update_ref
, int for_reloc
);
2841 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2842 struct btrfs_root
*root
,
2843 struct extent_buffer
*node
,
2844 struct extent_buffer
*parent
);
2845 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2848 * Get synced with close_ctree()
2851 return fs_info
->closing
;
2855 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2856 * anything except sleeping. This function is used to check the status of
2859 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
2861 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
2862 btrfs_fs_closing(root
->fs_info
));
2865 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2867 kfree(fs_info
->balance_ctl
);
2868 kfree(fs_info
->delayed_root
);
2869 kfree(fs_info
->extent_root
);
2870 kfree(fs_info
->tree_root
);
2871 kfree(fs_info
->chunk_root
);
2872 kfree(fs_info
->dev_root
);
2873 kfree(fs_info
->csum_root
);
2874 kfree(fs_info
->quota_root
);
2875 kfree(fs_info
->uuid_root
);
2876 kfree(fs_info
->free_space_root
);
2877 kfree(fs_info
->super_copy
);
2878 kfree(fs_info
->super_for_commit
);
2879 security_free_mnt_opts(&fs_info
->security_opts
);
2883 /* tree mod log functions from ctree.c */
2884 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2885 struct seq_list
*elem
);
2886 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2887 struct seq_list
*elem
);
2888 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2891 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2892 struct btrfs_root
*tree_root
,
2893 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2894 const char *name
, int name_len
);
2895 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2896 struct btrfs_root
*tree_root
,
2897 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2898 const char *name
, int name_len
);
2899 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2900 struct btrfs_key
*key
);
2901 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2902 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2904 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2905 struct btrfs_root
*root
,
2906 struct btrfs_key
*key
,
2907 struct btrfs_root_item
*item
);
2908 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
2909 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
2910 struct btrfs_key
*root_key
);
2911 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2912 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2913 struct extent_buffer
*node
);
2914 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2915 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
2916 struct btrfs_root
*root
);
2919 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
2920 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2922 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
2923 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2925 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
2926 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
2930 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
2931 const char *name
, int name_len
);
2932 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2933 struct btrfs_root
*root
, const char *name
,
2934 int name_len
, struct inode
*dir
,
2935 struct btrfs_key
*location
, u8 type
, u64 index
);
2936 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2937 struct btrfs_root
*root
,
2938 struct btrfs_path
*path
, u64 dir
,
2939 const char *name
, int name_len
,
2941 struct btrfs_dir_item
*
2942 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2943 struct btrfs_root
*root
,
2944 struct btrfs_path
*path
, u64 dir
,
2945 u64 objectid
, const char *name
, int name_len
,
2947 struct btrfs_dir_item
*
2948 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2949 struct btrfs_path
*path
, u64 dirid
,
2950 const char *name
, int name_len
);
2951 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2952 struct btrfs_root
*root
,
2953 struct btrfs_path
*path
,
2954 struct btrfs_dir_item
*di
);
2955 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2956 struct btrfs_root
*root
,
2957 struct btrfs_path
*path
, u64 objectid
,
2958 const char *name
, u16 name_len
,
2959 const void *data
, u16 data_len
);
2960 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2961 struct btrfs_root
*root
,
2962 struct btrfs_path
*path
, u64 dir
,
2963 const char *name
, u16 name_len
,
2965 int verify_dir_item(struct btrfs_root
*root
,
2966 struct extent_buffer
*leaf
,
2967 struct btrfs_dir_item
*dir_item
);
2968 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2969 struct btrfs_path
*path
,
2974 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2975 struct btrfs_root
*root
, u64 offset
);
2976 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2977 struct btrfs_root
*root
, u64 offset
);
2978 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2981 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2982 struct btrfs_root
*root
,
2983 const char *name
, int name_len
,
2984 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2985 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2986 struct btrfs_root
*root
,
2987 const char *name
, int name_len
,
2988 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2989 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2990 struct btrfs_root
*root
,
2991 struct btrfs_path
*path
, u64 objectid
);
2992 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2993 *root
, struct btrfs_path
*path
,
2994 struct btrfs_key
*location
, int mod
);
2996 struct btrfs_inode_extref
*
2997 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
2998 struct btrfs_root
*root
,
2999 struct btrfs_path
*path
,
3000 const char *name
, int name_len
,
3001 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3004 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3005 u64 ref_objectid
, const char *name
,
3007 struct btrfs_inode_extref
**extref_ret
);
3010 struct btrfs_dio_private
;
3011 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3012 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3013 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3014 struct bio
*bio
, u32
*dst
);
3015 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3016 struct bio
*bio
, u64 logical_offset
);
3017 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3018 struct btrfs_root
*root
,
3019 u64 objectid
, u64 pos
,
3020 u64 disk_offset
, u64 disk_num_bytes
,
3021 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3022 u8 compression
, u8 encryption
, u16 other_encoding
);
3023 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3024 struct btrfs_root
*root
,
3025 struct btrfs_path
*path
, u64 objectid
,
3026 u64 bytenr
, int mod
);
3027 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3028 struct btrfs_root
*root
,
3029 struct btrfs_ordered_sum
*sums
);
3030 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3031 struct bio
*bio
, u64 file_start
, int contig
);
3032 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3033 struct list_head
*list
, int search_commit
);
3034 void btrfs_extent_item_to_extent_map(struct inode
*inode
,
3035 const struct btrfs_path
*path
,
3036 struct btrfs_file_extent_item
*fi
,
3037 const bool new_inline
,
3038 struct extent_map
*em
);
3041 struct btrfs_delalloc_work
{
3042 struct inode
*inode
;
3044 struct completion completion
;
3045 struct list_head list
;
3046 struct btrfs_work work
;
3049 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3051 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3053 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3054 size_t pg_offset
, u64 start
, u64 len
,
3056 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3057 u64
*orig_start
, u64
*orig_block_len
,
3060 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3061 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3062 #define ClearPageChecked ClearPageFsMisc
3063 #define SetPageChecked SetPageFsMisc
3064 #define PageChecked PageFsMisc
3067 /* This forces readahead on a given range of bytes in an inode */
3068 static inline void btrfs_force_ra(struct address_space
*mapping
,
3069 struct file_ra_state
*ra
, struct file
*file
,
3070 pgoff_t offset
, unsigned long req_size
)
3072 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3075 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3076 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3077 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3078 struct btrfs_root
*root
,
3079 struct inode
*dir
, struct inode
*inode
,
3080 const char *name
, int name_len
);
3081 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3082 struct inode
*parent_inode
, struct inode
*inode
,
3083 const char *name
, int name_len
, int add_backref
, u64 index
);
3084 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3085 struct btrfs_root
*root
,
3086 struct inode
*dir
, u64 objectid
,
3087 const char *name
, int name_len
);
3088 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3090 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3091 struct btrfs_root
*root
,
3092 struct inode
*inode
, u64 new_size
,
3095 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3096 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3098 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3099 struct extent_state
**cached_state
);
3100 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3101 struct btrfs_root
*new_root
,
3102 struct btrfs_root
*parent_root
,
3104 int btrfs_merge_bio_hook(int rw
, struct page
*page
, unsigned long offset
,
3105 size_t size
, struct bio
*bio
,
3106 unsigned long bio_flags
);
3107 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3108 int btrfs_readpage(struct file
*file
, struct page
*page
);
3109 void btrfs_evict_inode(struct inode
*inode
);
3110 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3111 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3112 void btrfs_destroy_inode(struct inode
*inode
);
3113 int btrfs_drop_inode(struct inode
*inode
);
3114 int btrfs_init_cachep(void);
3115 void btrfs_destroy_cachep(void);
3116 long btrfs_ioctl_trans_end(struct file
*file
);
3117 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3118 struct btrfs_root
*root
, int *was_new
);
3119 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3120 size_t pg_offset
, u64 start
, u64 end
,
3122 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3123 struct btrfs_root
*root
,
3124 struct inode
*inode
);
3125 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3126 struct btrfs_root
*root
, struct inode
*inode
);
3127 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3128 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3129 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3130 struct btrfs_root
*root
);
3131 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3132 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3133 void btrfs_add_delayed_iput(struct inode
*inode
);
3134 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3135 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3136 u64 start
, u64 num_bytes
, u64 min_size
,
3137 loff_t actual_len
, u64
*alloc_hint
);
3138 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3139 struct btrfs_trans_handle
*trans
, int mode
,
3140 u64 start
, u64 num_bytes
, u64 min_size
,
3141 loff_t actual_len
, u64
*alloc_hint
);
3142 int btrfs_inode_check_errors(struct inode
*inode
);
3143 extern const struct dentry_operations btrfs_dentry_operations
;
3144 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3145 void btrfs_test_inode_set_ops(struct inode
*inode
);
3149 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3150 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3151 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3152 void btrfs_update_iflags(struct inode
*inode
);
3153 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3154 int btrfs_is_empty_uuid(u8
*uuid
);
3155 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3156 struct btrfs_ioctl_defrag_range_args
*range
,
3157 u64 newer_than
, unsigned long max_pages
);
3158 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3159 struct btrfs_ioctl_space_info
*space
);
3160 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3161 struct btrfs_ioctl_balance_args
*bargs
);
3162 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
3163 struct file
*dst_file
, u64 dst_loff
);
3166 int btrfs_auto_defrag_init(void);
3167 void btrfs_auto_defrag_exit(void);
3168 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3169 struct inode
*inode
);
3170 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3171 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3172 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3173 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3175 extern const struct file_operations btrfs_file_operations
;
3176 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3177 struct btrfs_root
*root
, struct inode
*inode
,
3178 struct btrfs_path
*path
, u64 start
, u64 end
,
3179 u64
*drop_end
, int drop_cache
,
3181 u32 extent_item_size
,
3183 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3184 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3185 u64 end
, int drop_cache
);
3186 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3187 struct inode
*inode
, u64 start
, u64 end
);
3188 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3189 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3190 struct page
**pages
, size_t num_pages
,
3191 loff_t pos
, size_t write_bytes
,
3192 struct extent_state
**cached
);
3193 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3194 ssize_t
btrfs_copy_file_range(struct file
*file_in
, loff_t pos_in
,
3195 struct file
*file_out
, loff_t pos_out
,
3196 size_t len
, unsigned int flags
);
3197 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
3198 struct file
*file_out
, loff_t pos_out
, u64 len
);
3201 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3202 struct btrfs_root
*root
);
3205 int btrfs_init_sysfs(void);
3206 void btrfs_exit_sysfs(void);
3207 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3208 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3211 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3214 int btrfs_parse_options(struct btrfs_root
*root
, char *options
,
3215 unsigned long new_flags
);
3216 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3218 #ifdef CONFIG_PRINTK
3220 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3222 static inline __printf(2, 3)
3223 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3228 #define btrfs_emerg(fs_info, fmt, args...) \
3229 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3230 #define btrfs_alert(fs_info, fmt, args...) \
3231 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3232 #define btrfs_crit(fs_info, fmt, args...) \
3233 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3234 #define btrfs_err(fs_info, fmt, args...) \
3235 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3236 #define btrfs_warn(fs_info, fmt, args...) \
3237 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3238 #define btrfs_notice(fs_info, fmt, args...) \
3239 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3240 #define btrfs_info(fs_info, fmt, args...) \
3241 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3244 * Wrappers that use printk_in_rcu
3246 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3247 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3248 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3249 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3250 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3251 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3252 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3253 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3254 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3255 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3256 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3257 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3258 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3259 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3262 * Wrappers that use a ratelimited printk_in_rcu
3264 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3265 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3266 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3267 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3268 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3269 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3270 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3271 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3272 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3273 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3274 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3275 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3276 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3277 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3280 * Wrappers that use a ratelimited printk
3282 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3283 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3284 #define btrfs_alert_rl(fs_info, fmt, args...) \
3285 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3286 #define btrfs_crit_rl(fs_info, fmt, args...) \
3287 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3288 #define btrfs_err_rl(fs_info, fmt, args...) \
3289 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3290 #define btrfs_warn_rl(fs_info, fmt, args...) \
3291 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3292 #define btrfs_notice_rl(fs_info, fmt, args...) \
3293 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3294 #define btrfs_info_rl(fs_info, fmt, args...) \
3295 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3297 #define btrfs_debug(fs_info, fmt, args...) \
3298 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3299 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3300 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3301 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3302 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3303 #define btrfs_debug_rl(fs_info, fmt, args...) \
3304 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3306 #define btrfs_debug(fs_info, fmt, args...) \
3307 no_printk(KERN_DEBUG fmt, ##args)
3308 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3309 no_printk(KERN_DEBUG fmt, ##args)
3310 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3311 no_printk(KERN_DEBUG fmt, ##args)
3312 #define btrfs_debug_rl(fs_info, fmt, args...) \
3313 no_printk(KERN_DEBUG fmt, ##args)
3316 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3319 btrfs_printk(fs_info, fmt, ##args); \
3320 rcu_read_unlock(); \
3323 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3325 static DEFINE_RATELIMIT_STATE(_rs, \
3326 DEFAULT_RATELIMIT_INTERVAL, \
3327 DEFAULT_RATELIMIT_BURST); \
3328 if (__ratelimit(&_rs)) \
3329 btrfs_printk(fs_info, fmt, ##args); \
3332 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3335 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3336 rcu_read_unlock(); \
3339 #ifdef CONFIG_BTRFS_ASSERT
3342 static inline void assfail(char *expr
, char *file
, int line
)
3344 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3349 #define ASSERT(expr) \
3350 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3352 #define ASSERT(expr) ((void)0)
3357 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3358 unsigned int line
, int errno
, const char *fmt
, ...);
3360 const char *btrfs_decode_error(int errno
);
3363 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3364 struct btrfs_root
*root
, const char *function
,
3365 unsigned int line
, int errno
);
3368 * Call btrfs_abort_transaction as early as possible when an error condition is
3369 * detected, that way the exact line number is reported.
3371 #define btrfs_abort_transaction(trans, root, errno) \
3373 /* Report first abort since mount */ \
3374 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3375 &((root)->fs_info->fs_state))) { \
3376 WARN(1, KERN_DEBUG \
3377 "BTRFS: Transaction aborted (error %d)\n", \
3380 __btrfs_abort_transaction((trans), (root), __func__, \
3381 __LINE__, (errno)); \
3384 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3386 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3387 (errno), fmt, ##args); \
3392 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3393 unsigned int line
, int errno
, const char *fmt
, ...);
3395 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3396 * will panic(). Otherwise we BUG() here.
3398 #define btrfs_panic(fs_info, errno, fmt, args...) \
3400 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3405 /* compatibility and incompatibility defines */
3407 #define btrfs_set_fs_incompat(__fs_info, opt) \
3408 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3410 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3413 struct btrfs_super_block
*disk_super
;
3416 disk_super
= fs_info
->super_copy
;
3417 features
= btrfs_super_incompat_flags(disk_super
);
3418 if (!(features
& flag
)) {
3419 spin_lock(&fs_info
->super_lock
);
3420 features
= btrfs_super_incompat_flags(disk_super
);
3421 if (!(features
& flag
)) {
3423 btrfs_set_super_incompat_flags(disk_super
, features
);
3424 btrfs_info(fs_info
, "setting %llu feature flag",
3427 spin_unlock(&fs_info
->super_lock
);
3431 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3432 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3434 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3437 struct btrfs_super_block
*disk_super
;
3440 disk_super
= fs_info
->super_copy
;
3441 features
= btrfs_super_incompat_flags(disk_super
);
3442 if (features
& flag
) {
3443 spin_lock(&fs_info
->super_lock
);
3444 features
= btrfs_super_incompat_flags(disk_super
);
3445 if (features
& flag
) {
3447 btrfs_set_super_incompat_flags(disk_super
, features
);
3448 btrfs_info(fs_info
, "clearing %llu feature flag",
3451 spin_unlock(&fs_info
->super_lock
);
3455 #define btrfs_fs_incompat(fs_info, opt) \
3456 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3458 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3460 struct btrfs_super_block
*disk_super
;
3461 disk_super
= fs_info
->super_copy
;
3462 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3465 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3466 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3468 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3471 struct btrfs_super_block
*disk_super
;
3474 disk_super
= fs_info
->super_copy
;
3475 features
= btrfs_super_compat_ro_flags(disk_super
);
3476 if (!(features
& flag
)) {
3477 spin_lock(&fs_info
->super_lock
);
3478 features
= btrfs_super_compat_ro_flags(disk_super
);
3479 if (!(features
& flag
)) {
3481 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3482 btrfs_info(fs_info
, "setting %llu ro feature flag",
3485 spin_unlock(&fs_info
->super_lock
);
3489 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3490 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3492 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3495 struct btrfs_super_block
*disk_super
;
3498 disk_super
= fs_info
->super_copy
;
3499 features
= btrfs_super_compat_ro_flags(disk_super
);
3500 if (features
& flag
) {
3501 spin_lock(&fs_info
->super_lock
);
3502 features
= btrfs_super_compat_ro_flags(disk_super
);
3503 if (features
& flag
) {
3505 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3506 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3509 spin_unlock(&fs_info
->super_lock
);
3513 #define btrfs_fs_compat_ro(fs_info, opt) \
3514 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3516 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3518 struct btrfs_super_block
*disk_super
;
3519 disk_super
= fs_info
->super_copy
;
3520 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3524 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3525 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3526 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3527 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3528 struct inode
*inode
, struct inode
*dir
);
3530 #define btrfs_get_acl NULL
3531 #define btrfs_set_acl NULL
3532 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3533 struct inode
*inode
, struct inode
*dir
)
3540 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3541 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3542 struct btrfs_root
*root
);
3543 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3544 struct btrfs_root
*root
);
3545 int btrfs_recover_relocation(struct btrfs_root
*root
);
3546 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3547 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3548 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3549 struct extent_buffer
*cow
);
3550 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3551 u64
*bytes_to_reserve
);
3552 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3553 struct btrfs_pending_snapshot
*pending
);
3556 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3557 u64 end
, struct btrfs_scrub_progress
*progress
,
3558 int readonly
, int is_dev_replace
);
3559 void btrfs_scrub_pause(struct btrfs_root
*root
);
3560 void btrfs_scrub_continue(struct btrfs_root
*root
);
3561 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3562 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3563 struct btrfs_device
*dev
);
3564 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3565 struct btrfs_scrub_progress
*progress
);
3568 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3569 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3570 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3572 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3574 btrfs_bio_counter_sub(fs_info
, 1);
3578 struct reada_control
{
3579 struct btrfs_root
*root
; /* tree to prefetch */
3580 struct btrfs_key key_start
;
3581 struct btrfs_key key_end
; /* exclusive */
3584 wait_queue_head_t wait
;
3586 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3587 struct btrfs_key
*start
, struct btrfs_key
*end
);
3588 int btrfs_reada_wait(void *handle
);
3589 void btrfs_reada_detach(void *handle
);
3590 int btree_readahead_hook(struct btrfs_fs_info
*fs_info
,
3591 struct extent_buffer
*eb
, u64 start
, int err
);
3593 static inline int is_fstree(u64 rootid
)
3595 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3596 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3597 !btrfs_qgroup_level(rootid
)))
3602 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3604 return signal_pending(current
);
3607 /* Sanity test specific functions */
3608 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3609 void btrfs_test_destroy_inode(struct inode
*inode
);
3612 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3614 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3615 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
,
3616 &fs_info
->fs_state
)))