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__
));
149 * this is a very generous portion of the super block, giving us
150 * room to translate 14 chunks with 3 stripes each.
152 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
155 * just in case we somehow lose the roots and are not able to mount,
156 * we store an array of the roots from previous transactions
159 #define BTRFS_NUM_BACKUP_ROOTS 4
160 struct btrfs_root_backup
{
162 __le64 tree_root_gen
;
165 __le64 chunk_root_gen
;
168 __le64 extent_root_gen
;
177 __le64 csum_root_gen
;
187 u8 extent_root_level
;
191 /* future and to align */
193 } __attribute__ ((__packed__
));
196 * the super block basically lists the main trees of the FS
197 * it currently lacks any block count etc etc
199 struct btrfs_super_block
{
200 u8 csum
[BTRFS_CSUM_SIZE
];
201 /* the first 4 fields must match struct btrfs_header */
202 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
203 __le64 bytenr
; /* this block number */
206 /* allowed to be different from the btrfs_header from here own down */
213 /* this will help find the new super based on the log root */
214 __le64 log_root_transid
;
217 __le64 root_dir_objectid
;
221 __le32 __unused_leafsize
;
223 __le32 sys_chunk_array_size
;
224 __le64 chunk_root_generation
;
226 __le64 compat_ro_flags
;
227 __le64 incompat_flags
;
232 struct btrfs_dev_item dev_item
;
234 char label
[BTRFS_LABEL_SIZE
];
236 __le64 cache_generation
;
237 __le64 uuid_tree_generation
;
239 /* future expansion */
241 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
242 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
243 } __attribute__ ((__packed__
));
246 * Compat flags that we support. If any incompat flags are set other than the
247 * ones specified below then we will fail to mount
249 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
250 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
251 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
253 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
254 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
256 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
257 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
259 #define BTRFS_FEATURE_INCOMPAT_SUPP \
260 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
261 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
262 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
263 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
264 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
265 BTRFS_FEATURE_INCOMPAT_RAID56 | \
266 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
267 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
268 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
270 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
271 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
272 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
275 * A leaf is full of items. offset and size tell us where to find
276 * the item in the leaf (relative to the start of the data area)
279 struct btrfs_disk_key key
;
282 } __attribute__ ((__packed__
));
285 * leaves have an item area and a data area:
286 * [item0, item1....itemN] [free space] [dataN...data1, data0]
288 * The data is separate from the items to get the keys closer together
292 struct btrfs_header header
;
293 struct btrfs_item items
[];
294 } __attribute__ ((__packed__
));
297 * all non-leaf blocks are nodes, they hold only keys and pointers to
300 struct btrfs_key_ptr
{
301 struct btrfs_disk_key key
;
304 } __attribute__ ((__packed__
));
307 struct btrfs_header header
;
308 struct btrfs_key_ptr ptrs
[];
309 } __attribute__ ((__packed__
));
312 * btrfs_paths remember the path taken from the root down to the leaf.
313 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
314 * to any other levels that are present.
316 * The slots array records the index of the item or block pointer
317 * used while walking the tree.
319 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
321 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
322 int slots
[BTRFS_MAX_LEVEL
];
323 /* if there is real range locking, this locks field will change */
324 u8 locks
[BTRFS_MAX_LEVEL
];
326 /* keep some upper locks as we walk down */
330 * set by btrfs_split_item, tells search_slot to keep all locks
331 * and to force calls to keep space in the nodes
333 unsigned int search_for_split
:1;
334 unsigned int keep_locks
:1;
335 unsigned int skip_locking
:1;
336 unsigned int leave_spinning
:1;
337 unsigned int search_commit_root
:1;
338 unsigned int need_commit_sem
:1;
339 unsigned int skip_release_on_error
:1;
341 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
342 sizeof(struct btrfs_item))
343 struct btrfs_dev_replace
{
344 u64 replace_state
; /* see #define above */
345 u64 time_started
; /* seconds since 1-Jan-1970 */
346 u64 time_stopped
; /* seconds since 1-Jan-1970 */
347 atomic64_t num_write_errors
;
348 atomic64_t num_uncorrectable_read_errors
;
351 u64 committed_cursor_left
;
352 u64 cursor_left_last_write_of_item
;
355 u64 cont_reading_from_srcdev_mode
; /* see #define above */
358 int item_needs_writeback
;
359 struct btrfs_device
*srcdev
;
360 struct btrfs_device
*tgtdev
;
363 atomic_t nesting_level
;
364 struct mutex lock_finishing_cancel_unmount
;
367 atomic_t blocking_readers
;
368 wait_queue_head_t read_lock_wq
;
370 struct btrfs_scrub_progress scrub_progress
;
373 /* For raid type sysfs entries */
374 struct raid_kobject
{
379 struct btrfs_space_info
{
382 u64 total_bytes
; /* total bytes in the space,
383 this doesn't take mirrors into account */
384 u64 bytes_used
; /* total bytes used,
385 this doesn't take mirrors into account */
386 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
387 transaction finishes */
388 u64 bytes_reserved
; /* total bytes the allocator has reserved for
389 current allocations */
390 u64 bytes_may_use
; /* number of bytes that may be used for
391 delalloc/allocations */
392 u64 bytes_readonly
; /* total bytes that are read only */
394 u64 max_extent_size
; /* This will hold the maximum extent size of
395 the space info if we had an ENOSPC in the
398 unsigned int full
:1; /* indicates that we cannot allocate any more
399 chunks for this space */
400 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
402 unsigned int flush
:1; /* set if we are trying to make space */
404 unsigned int force_alloc
; /* set if we need to force a chunk
405 alloc for this space */
407 u64 disk_used
; /* total bytes used on disk */
408 u64 disk_total
; /* total bytes on disk, takes mirrors into
414 * bytes_pinned is kept in line with what is actually pinned, as in
415 * we've called update_block_group and dropped the bytes_used counter
416 * and increased the bytes_pinned counter. However this means that
417 * bytes_pinned does not reflect the bytes that will be pinned once the
418 * delayed refs are flushed, so this counter is inc'ed every time we
419 * call btrfs_free_extent so it is a realtime count of what will be
420 * freed once the transaction is committed. It will be zeroed every
421 * time the transaction commits.
423 struct percpu_counter total_bytes_pinned
;
425 struct list_head list
;
426 /* Protected by the spinlock 'lock'. */
427 struct list_head ro_bgs
;
428 struct list_head priority_tickets
;
429 struct list_head tickets
;
431 struct rw_semaphore groups_sem
;
432 /* for block groups in our same type */
433 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
434 wait_queue_head_t wait
;
437 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
440 #define BTRFS_BLOCK_RSV_GLOBAL 1
441 #define BTRFS_BLOCK_RSV_DELALLOC 2
442 #define BTRFS_BLOCK_RSV_TRANS 3
443 #define BTRFS_BLOCK_RSV_CHUNK 4
444 #define BTRFS_BLOCK_RSV_DELOPS 5
445 #define BTRFS_BLOCK_RSV_EMPTY 6
446 #define BTRFS_BLOCK_RSV_TEMP 7
448 struct btrfs_block_rsv
{
451 struct btrfs_space_info
*space_info
;
455 unsigned short failfast
;
459 * free clusters are used to claim free space in relatively large chunks,
460 * allowing us to do less seeky writes. They are used for all metadata
461 * allocations and data allocations in ssd mode.
463 struct btrfs_free_cluster
{
465 spinlock_t refill_lock
;
468 /* largest extent in this cluster */
471 /* first extent starting offset */
474 /* We did a full search and couldn't create a cluster */
477 struct btrfs_block_group_cache
*block_group
;
479 * when a cluster is allocated from a block group, we put the
480 * cluster onto a list in the block group so that it can
481 * be freed before the block group is freed.
483 struct list_head block_group_list
;
486 enum btrfs_caching_type
{
488 BTRFS_CACHE_STARTED
= 1,
489 BTRFS_CACHE_FAST
= 2,
490 BTRFS_CACHE_FINISHED
= 3,
491 BTRFS_CACHE_ERROR
= 4,
494 enum btrfs_disk_cache_state
{
495 BTRFS_DC_WRITTEN
= 0,
501 struct btrfs_caching_control
{
502 struct list_head list
;
504 wait_queue_head_t wait
;
505 struct btrfs_work work
;
506 struct btrfs_block_group_cache
*block_group
;
511 /* Once caching_thread() finds this much free space, it will wake up waiters. */
512 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
514 struct btrfs_io_ctl
{
518 struct btrfs_root
*root
;
525 unsigned check_crcs
:1;
528 struct btrfs_block_group_cache
{
529 struct btrfs_key key
;
530 struct btrfs_block_group_item item
;
531 struct btrfs_fs_info
*fs_info
;
539 u64 cache_generation
;
543 * If the free space extent count exceeds this number, convert the block
546 u32 bitmap_high_thresh
;
549 * If the free space extent count drops below this number, convert the
550 * block group back to extents.
552 u32 bitmap_low_thresh
;
555 * It is just used for the delayed data space allocation because
556 * only the data space allocation and the relative metadata update
557 * can be done cross the transaction.
559 struct rw_semaphore data_rwsem
;
561 /* for raid56, this is a full stripe, without parity */
562 unsigned long full_stripe_len
;
566 unsigned int has_caching_ctl
:1;
567 unsigned int removed
:1;
569 int disk_cache_state
;
571 /* cache tracking stuff */
573 struct btrfs_caching_control
*caching_ctl
;
574 u64 last_byte_to_unpin
;
576 struct btrfs_space_info
*space_info
;
578 /* free space cache stuff */
579 struct btrfs_free_space_ctl
*free_space_ctl
;
581 /* block group cache stuff */
582 struct rb_node cache_node
;
584 /* for block groups in the same raid type */
585 struct list_head list
;
590 /* List of struct btrfs_free_clusters for this block group.
591 * Today it will only have one thing on it, but that may change
593 struct list_head cluster_list
;
595 /* For delayed block group creation or deletion of empty block groups */
596 struct list_head bg_list
;
598 /* For read-only block groups */
599 struct list_head ro_list
;
603 /* For dirty block groups */
604 struct list_head dirty_list
;
605 struct list_head io_list
;
607 struct btrfs_io_ctl io_ctl
;
610 * Incremented when doing extent allocations and holding a read lock
611 * on the space_info's groups_sem semaphore.
612 * Decremented when an ordered extent that represents an IO against this
613 * block group's range is created (after it's added to its inode's
614 * root's list of ordered extents) or immediately after the allocation
615 * if it's a metadata extent or fallocate extent (for these cases we
616 * don't create ordered extents).
618 atomic_t reservations
;
621 * Incremented while holding the spinlock *lock* by a task checking if
622 * it can perform a nocow write (incremented if the value for the *ro*
623 * field is 0). Decremented by such tasks once they create an ordered
624 * extent or before that if some error happens before reaching that step.
625 * This is to prevent races between block group relocation and nocow
626 * writes through direct IO.
628 atomic_t nocow_writers
;
630 /* Lock for free space tree operations. */
631 struct mutex free_space_lock
;
634 * Does the block group need to be added to the free space tree?
635 * Protected by free_space_lock.
637 int needs_free_space
;
640 /* delayed seq elem */
642 struct list_head list
;
646 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
648 enum btrfs_orphan_cleanup_state
{
649 ORPHAN_CLEANUP_STARTED
= 1,
650 ORPHAN_CLEANUP_DONE
= 2,
653 /* used by the raid56 code to lock stripes for read/modify/write */
654 struct btrfs_stripe_hash
{
655 struct list_head hash_list
;
656 wait_queue_head_t wait
;
660 /* used by the raid56 code to lock stripes for read/modify/write */
661 struct btrfs_stripe_hash_table
{
662 struct list_head stripe_cache
;
663 spinlock_t cache_lock
;
665 struct btrfs_stripe_hash table
[];
668 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
670 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
673 struct reloc_control
;
675 struct btrfs_fs_devices
;
676 struct btrfs_balance_control
;
677 struct btrfs_delayed_root
;
678 struct btrfs_fs_info
{
679 u8 fsid
[BTRFS_FSID_SIZE
];
680 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
681 struct btrfs_root
*extent_root
;
682 struct btrfs_root
*tree_root
;
683 struct btrfs_root
*chunk_root
;
684 struct btrfs_root
*dev_root
;
685 struct btrfs_root
*fs_root
;
686 struct btrfs_root
*csum_root
;
687 struct btrfs_root
*quota_root
;
688 struct btrfs_root
*uuid_root
;
689 struct btrfs_root
*free_space_root
;
691 /* the log root tree is a directory of all the other log roots */
692 struct btrfs_root
*log_root_tree
;
694 spinlock_t fs_roots_radix_lock
;
695 struct radix_tree_root fs_roots_radix
;
697 /* block group cache stuff */
698 spinlock_t block_group_cache_lock
;
699 u64 first_logical_byte
;
700 struct rb_root block_group_cache_tree
;
702 /* keep track of unallocated space */
703 spinlock_t free_chunk_lock
;
704 u64 free_chunk_space
;
706 struct extent_io_tree freed_extents
[2];
707 struct extent_io_tree
*pinned_extents
;
709 /* logical->physical extent mapping */
710 struct btrfs_mapping_tree mapping_tree
;
713 * block reservation for extent, checksum, root tree and
714 * delayed dir index item
716 struct btrfs_block_rsv global_block_rsv
;
717 /* block reservation for delay allocation */
718 struct btrfs_block_rsv delalloc_block_rsv
;
719 /* block reservation for metadata operations */
720 struct btrfs_block_rsv trans_block_rsv
;
721 /* block reservation for chunk tree */
722 struct btrfs_block_rsv chunk_block_rsv
;
723 /* block reservation for delayed operations */
724 struct btrfs_block_rsv delayed_block_rsv
;
726 struct btrfs_block_rsv empty_block_rsv
;
729 u64 last_trans_committed
;
730 u64 avg_delayed_ref_runtime
;
733 * this is updated to the current trans every time a full commit
734 * is required instead of the faster short fsync log commits
736 u64 last_trans_log_full_commit
;
737 unsigned long mount_opt
;
739 * Track requests for actions that need to be done during transaction
740 * commit (like for some mount options).
742 unsigned long pending_changes
;
743 unsigned long compress_type
:4;
746 * It is a suggestive number, the read side is safe even it gets a
747 * wrong number because we will write out the data into a regular
748 * extent. The write side(mount/remount) is under ->s_umount lock,
749 * so it is also safe.
753 * Protected by ->chunk_mutex and sb->s_umount.
755 * The reason that we use two lock to protect it is because only
756 * remount and mount operations can change it and these two operations
757 * are under sb->s_umount, but the read side (chunk allocation) can not
758 * acquire sb->s_umount or the deadlock would happen. So we use two
759 * locks to protect it. On the write side, we must acquire two locks,
760 * and on the read side, we just need acquire one of them.
763 struct btrfs_transaction
*running_transaction
;
764 wait_queue_head_t transaction_throttle
;
765 wait_queue_head_t transaction_wait
;
766 wait_queue_head_t transaction_blocked_wait
;
767 wait_queue_head_t async_submit_wait
;
770 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
771 * when they are updated.
773 * Because we do not clear the flags for ever, so we needn't use
774 * the lock on the read side.
776 * We also needn't use the lock when we mount the fs, because
777 * there is no other task which will update the flag.
779 spinlock_t super_lock
;
780 struct btrfs_super_block
*super_copy
;
781 struct btrfs_super_block
*super_for_commit
;
782 struct block_device
*__bdev
;
783 struct super_block
*sb
;
784 struct inode
*btree_inode
;
785 struct backing_dev_info bdi
;
786 struct mutex tree_log_mutex
;
787 struct mutex transaction_kthread_mutex
;
788 struct mutex cleaner_mutex
;
789 struct mutex chunk_mutex
;
790 struct mutex volume_mutex
;
793 * this is taken to make sure we don't set block groups ro after
794 * the free space cache has been allocated on them
796 struct mutex ro_block_group_mutex
;
798 /* this is used during read/modify/write to make sure
799 * no two ios are trying to mod the same stripe at the same
802 struct btrfs_stripe_hash_table
*stripe_hash_table
;
805 * this protects the ordered operations list only while we are
806 * processing all of the entries on it. This way we make
807 * sure the commit code doesn't find the list temporarily empty
808 * because another function happens to be doing non-waiting preflush
809 * before jumping into the main commit.
811 struct mutex ordered_operations_mutex
;
813 struct rw_semaphore commit_root_sem
;
815 struct rw_semaphore cleanup_work_sem
;
817 struct rw_semaphore subvol_sem
;
818 struct srcu_struct subvol_srcu
;
820 spinlock_t trans_lock
;
822 * the reloc mutex goes with the trans lock, it is taken
823 * during commit to protect us from the relocation code
825 struct mutex reloc_mutex
;
827 struct list_head trans_list
;
828 struct list_head dead_roots
;
829 struct list_head caching_block_groups
;
831 spinlock_t delayed_iput_lock
;
832 struct list_head delayed_iputs
;
833 struct mutex cleaner_delayed_iput_mutex
;
835 /* this protects tree_mod_seq_list */
836 spinlock_t tree_mod_seq_lock
;
837 atomic64_t tree_mod_seq
;
838 struct list_head tree_mod_seq_list
;
840 /* this protects tree_mod_log */
841 rwlock_t tree_mod_log_lock
;
842 struct rb_root tree_mod_log
;
844 atomic_t nr_async_submits
;
845 atomic_t async_submit_draining
;
846 atomic_t nr_async_bios
;
847 atomic_t async_delalloc_pages
;
848 atomic_t open_ioctl_trans
;
851 * this is used to protect the following list -- ordered_roots.
853 spinlock_t ordered_root_lock
;
856 * all fs/file tree roots in which there are data=ordered extents
857 * pending writeback are added into this list.
859 * these can span multiple transactions and basically include
860 * every dirty data page that isn't from nodatacow
862 struct list_head ordered_roots
;
864 struct mutex delalloc_root_mutex
;
865 spinlock_t delalloc_root_lock
;
866 /* all fs/file tree roots that have delalloc inodes. */
867 struct list_head delalloc_roots
;
870 * there is a pool of worker threads for checksumming during writes
871 * and a pool for checksumming after reads. This is because readers
872 * can run with FS locks held, and the writers may be waiting for
873 * those locks. We don't want ordering in the pending list to cause
874 * deadlocks, and so the two are serviced separately.
876 * A third pool does submit_bio to avoid deadlocking with the other
879 struct btrfs_workqueue
*workers
;
880 struct btrfs_workqueue
*delalloc_workers
;
881 struct btrfs_workqueue
*flush_workers
;
882 struct btrfs_workqueue
*endio_workers
;
883 struct btrfs_workqueue
*endio_meta_workers
;
884 struct btrfs_workqueue
*endio_raid56_workers
;
885 struct btrfs_workqueue
*endio_repair_workers
;
886 struct btrfs_workqueue
*rmw_workers
;
887 struct btrfs_workqueue
*endio_meta_write_workers
;
888 struct btrfs_workqueue
*endio_write_workers
;
889 struct btrfs_workqueue
*endio_freespace_worker
;
890 struct btrfs_workqueue
*submit_workers
;
891 struct btrfs_workqueue
*caching_workers
;
892 struct btrfs_workqueue
*readahead_workers
;
895 * fixup workers take dirty pages that didn't properly go through
896 * the cow mechanism and make them safe to write. It happens
897 * for the sys_munmap function call path
899 struct btrfs_workqueue
*fixup_workers
;
900 struct btrfs_workqueue
*delayed_workers
;
902 /* the extent workers do delayed refs on the extent allocation tree */
903 struct btrfs_workqueue
*extent_workers
;
904 struct task_struct
*transaction_kthread
;
905 struct task_struct
*cleaner_kthread
;
906 int thread_pool_size
;
908 struct kobject
*space_info_kobj
;
911 int log_root_recovering
;
916 /* used to keep from writing metadata until there is a nice batch */
917 struct percpu_counter dirty_metadata_bytes
;
918 struct percpu_counter delalloc_bytes
;
919 s32 dirty_metadata_batch
;
922 struct list_head dirty_cowonly_roots
;
924 struct btrfs_fs_devices
*fs_devices
;
927 * the space_info list is almost entirely read only. It only changes
928 * when we add a new raid type to the FS, and that happens
929 * very rarely. RCU is used to protect it.
931 struct list_head space_info
;
933 struct btrfs_space_info
*data_sinfo
;
935 struct reloc_control
*reloc_ctl
;
937 /* data_alloc_cluster is only used in ssd mode */
938 struct btrfs_free_cluster data_alloc_cluster
;
940 /* all metadata allocations go through this cluster */
941 struct btrfs_free_cluster meta_alloc_cluster
;
943 /* auto defrag inodes go here */
944 spinlock_t defrag_inodes_lock
;
945 struct rb_root defrag_inodes
;
946 atomic_t defrag_running
;
948 /* Used to protect avail_{data, metadata, system}_alloc_bits */
949 seqlock_t profiles_lock
;
951 * these three are in extended format (availability of single
952 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
953 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
955 u64 avail_data_alloc_bits
;
956 u64 avail_metadata_alloc_bits
;
957 u64 avail_system_alloc_bits
;
959 /* restriper state */
960 spinlock_t balance_lock
;
961 struct mutex balance_mutex
;
962 atomic_t balance_running
;
963 atomic_t balance_pause_req
;
964 atomic_t balance_cancel_req
;
965 struct btrfs_balance_control
*balance_ctl
;
966 wait_queue_head_t balance_wait_q
;
968 unsigned data_chunk_allocations
;
969 unsigned metadata_ratio
;
973 /* private scrub information */
974 struct mutex scrub_lock
;
975 atomic_t scrubs_running
;
976 atomic_t scrub_pause_req
;
977 atomic_t scrubs_paused
;
978 atomic_t scrub_cancel_req
;
979 wait_queue_head_t scrub_pause_wait
;
980 int scrub_workers_refcnt
;
981 struct btrfs_workqueue
*scrub_workers
;
982 struct btrfs_workqueue
*scrub_wr_completion_workers
;
983 struct btrfs_workqueue
*scrub_nocow_workers
;
984 struct btrfs_workqueue
*scrub_parity_workers
;
986 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
987 u32 check_integrity_print_mask
;
992 unsigned int quota_enabled
:1;
995 * quota_enabled only changes state after a commit. This holds the
998 unsigned int pending_quota_state
:1;
1000 /* is qgroup tracking in a consistent state? */
1003 /* holds configuration and tracking. Protected by qgroup_lock */
1004 struct rb_root qgroup_tree
;
1005 struct rb_root qgroup_op_tree
;
1006 spinlock_t qgroup_lock
;
1007 spinlock_t qgroup_op_lock
;
1008 atomic_t qgroup_op_seq
;
1011 * used to avoid frequently calling ulist_alloc()/ulist_free()
1012 * when doing qgroup accounting, it must be protected by qgroup_lock.
1014 struct ulist
*qgroup_ulist
;
1016 /* protect user change for quota operations */
1017 struct mutex qgroup_ioctl_lock
;
1019 /* list of dirty qgroups to be written at next commit */
1020 struct list_head dirty_qgroups
;
1022 /* used by qgroup for an efficient tree traversal */
1025 /* qgroup rescan items */
1026 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1027 struct btrfs_key qgroup_rescan_progress
;
1028 struct btrfs_workqueue
*qgroup_rescan_workers
;
1029 struct completion qgroup_rescan_completion
;
1030 struct btrfs_work qgroup_rescan_work
;
1031 bool qgroup_rescan_running
; /* protected by qgroup_rescan_lock */
1033 /* filesystem state */
1034 unsigned long fs_state
;
1036 struct btrfs_delayed_root
*delayed_root
;
1038 /* readahead tree */
1039 spinlock_t reada_lock
;
1040 struct radix_tree_root reada_tree
;
1042 /* readahead works cnt */
1043 atomic_t reada_works_cnt
;
1045 /* Extent buffer radix tree */
1046 spinlock_t buffer_lock
;
1047 struct radix_tree_root buffer_radix
;
1049 /* next backup root to be overwritten */
1050 int backup_root_index
;
1052 int num_tolerated_disk_barrier_failures
;
1054 /* device replace state */
1055 struct btrfs_dev_replace dev_replace
;
1057 atomic_t mutually_exclusive_operation_running
;
1059 struct percpu_counter bio_counter
;
1060 wait_queue_head_t replace_wait
;
1062 struct semaphore uuid_tree_rescan_sem
;
1063 unsigned int update_uuid_tree_gen
:1;
1065 /* Used to reclaim the metadata space in the background. */
1066 struct work_struct async_reclaim_work
;
1068 spinlock_t unused_bgs_lock
;
1069 struct list_head unused_bgs
;
1070 struct mutex unused_bg_unpin_mutex
;
1071 struct mutex delete_unused_bgs_mutex
;
1073 /* For btrfs to record security options */
1074 struct security_mnt_opts security_opts
;
1077 * Chunks that can't be freed yet (under a trim/discard operation)
1078 * and will be latter freed. Protected by fs_info->chunk_mutex.
1080 struct list_head pinned_chunks
;
1082 int creating_free_space_tree
;
1083 /* Used to record internally whether fs has been frozen */
1087 struct btrfs_subvolume_writers
{
1088 struct percpu_counter counter
;
1089 wait_queue_head_t wait
;
1093 * The state of btrfs root
1096 * btrfs_record_root_in_trans is a multi-step process,
1097 * and it can race with the balancing code. But the
1098 * race is very small, and only the first time the root
1099 * is added to each transaction. So IN_TRANS_SETUP
1100 * is used to tell us when more checks are required
1102 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1103 #define BTRFS_ROOT_REF_COWS 1
1104 #define BTRFS_ROOT_TRACK_DIRTY 2
1105 #define BTRFS_ROOT_IN_RADIX 3
1106 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1107 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1108 #define BTRFS_ROOT_FORCE_COW 6
1109 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1110 #define BTRFS_ROOT_DIRTY 8
1113 * in ram representation of the tree. extent_root is used for all allocations
1114 * and for the extent tree extent_root root.
1117 struct extent_buffer
*node
;
1119 struct extent_buffer
*commit_root
;
1120 struct btrfs_root
*log_root
;
1121 struct btrfs_root
*reloc_root
;
1123 unsigned long state
;
1124 struct btrfs_root_item root_item
;
1125 struct btrfs_key root_key
;
1126 struct btrfs_fs_info
*fs_info
;
1127 struct extent_io_tree dirty_log_pages
;
1129 struct mutex objectid_mutex
;
1131 spinlock_t accounting_lock
;
1132 struct btrfs_block_rsv
*block_rsv
;
1134 /* free ino cache stuff */
1135 struct btrfs_free_space_ctl
*free_ino_ctl
;
1136 enum btrfs_caching_type ino_cache_state
;
1137 spinlock_t ino_cache_lock
;
1138 wait_queue_head_t ino_cache_wait
;
1139 struct btrfs_free_space_ctl
*free_ino_pinned
;
1140 u64 ino_cache_progress
;
1141 struct inode
*ino_cache_inode
;
1143 struct mutex log_mutex
;
1144 wait_queue_head_t log_writer_wait
;
1145 wait_queue_head_t log_commit_wait
[2];
1146 struct list_head log_ctxs
[2];
1147 atomic_t log_writers
;
1148 atomic_t log_commit
[2];
1151 /* No matter the commit succeeds or not*/
1152 int log_transid_committed
;
1153 /* Just be updated when the commit succeeds. */
1154 int last_log_commit
;
1155 pid_t log_start_pid
;
1160 /* data allocations are done in sectorsize units */
1163 /* node allocations are done in nodesize units */
1170 u64 highest_objectid
;
1172 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1173 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1177 u64 defrag_trans_start
;
1178 struct btrfs_key defrag_progress
;
1179 struct btrfs_key defrag_max
;
1182 /* the dirty list is only used by non-reference counted roots */
1183 struct list_head dirty_list
;
1185 struct list_head root_list
;
1187 spinlock_t log_extents_lock
[2];
1188 struct list_head logged_list
[2];
1190 spinlock_t orphan_lock
;
1191 atomic_t orphan_inodes
;
1192 struct btrfs_block_rsv
*orphan_block_rsv
;
1193 int orphan_cleanup_state
;
1195 spinlock_t inode_lock
;
1196 /* red-black tree that keeps track of in-memory inodes */
1197 struct rb_root inode_tree
;
1200 * radix tree that keeps track of delayed nodes of every inode,
1201 * protected by inode_lock
1203 struct radix_tree_root delayed_nodes_tree
;
1205 * right now this just gets used so that a root has its own devid
1206 * for stat. It may be used for more later
1210 spinlock_t root_item_lock
;
1213 struct mutex delalloc_mutex
;
1214 spinlock_t delalloc_lock
;
1216 * all of the inodes that have delalloc bytes. It is possible for
1217 * this list to be empty even when there is still dirty data=ordered
1218 * extents waiting to finish IO.
1220 struct list_head delalloc_inodes
;
1221 struct list_head delalloc_root
;
1222 u64 nr_delalloc_inodes
;
1224 struct mutex ordered_extent_mutex
;
1226 * this is used by the balancing code to wait for all the pending
1229 spinlock_t ordered_extent_lock
;
1232 * all of the data=ordered extents pending writeback
1233 * these can span multiple transactions and basically include
1234 * every dirty data page that isn't from nodatacow
1236 struct list_head ordered_extents
;
1237 struct list_head ordered_root
;
1238 u64 nr_ordered_extents
;
1241 * Number of currently running SEND ioctls to prevent
1242 * manipulation with the read-only status via SUBVOL_SETFLAGS
1244 int send_in_progress
;
1245 struct btrfs_subvolume_writers
*subv_writers
;
1246 atomic_t will_be_snapshoted
;
1248 /* For qgroup metadata space reserve */
1249 atomic_t qgroup_meta_rsv
;
1252 static inline u32
__BTRFS_LEAF_DATA_SIZE(u32 blocksize
)
1254 return blocksize
- sizeof(struct btrfs_header
);
1257 static inline u32
BTRFS_LEAF_DATA_SIZE(const struct btrfs_root
*root
)
1259 return __BTRFS_LEAF_DATA_SIZE(root
->nodesize
);
1262 static inline u32
BTRFS_MAX_ITEM_SIZE(const struct btrfs_root
*root
)
1264 return BTRFS_LEAF_DATA_SIZE(root
) - sizeof(struct btrfs_item
);
1267 static inline u32
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_root
*root
)
1269 return BTRFS_LEAF_DATA_SIZE(root
) / sizeof(struct btrfs_key_ptr
);
1272 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1273 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1274 static inline u32
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_root
*root
)
1276 return BTRFS_MAX_ITEM_SIZE(root
) -
1277 BTRFS_FILE_EXTENT_INLINE_DATA_START
;
1280 static inline u32
BTRFS_MAX_XATTR_SIZE(const struct btrfs_root
*root
)
1282 return BTRFS_MAX_ITEM_SIZE(root
) - sizeof(struct btrfs_dir_item
);
1286 * Flags for mount options.
1288 * Note: don't forget to add new options to btrfs_show_options()
1290 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1291 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1292 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1293 #define BTRFS_MOUNT_SSD (1 << 3)
1294 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1295 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1296 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1297 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1298 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1299 #define BTRFS_MOUNT_NOSSD (1 << 9)
1300 #define BTRFS_MOUNT_DISCARD (1 << 10)
1301 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1302 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1303 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1304 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1305 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1306 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1307 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1308 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1309 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1310 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1311 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1312 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1313 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1314 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1315 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1316 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1317 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1319 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1320 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1322 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1323 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1324 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1325 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1328 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1330 if (!btrfs_test_opt(fs_info, opt)) \
1331 btrfs_info(fs_info, fmt, ##args); \
1332 btrfs_set_opt(fs_info->mount_opt, opt); \
1335 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1337 if (btrfs_test_opt(fs_info, opt)) \
1338 btrfs_info(fs_info, fmt, ##args); \
1339 btrfs_clear_opt(fs_info->mount_opt, opt); \
1342 #ifdef CONFIG_BTRFS_DEBUG
1344 btrfs_should_fragment_free_space(struct btrfs_root
*root
,
1345 struct btrfs_block_group_cache
*block_group
)
1347 return (btrfs_test_opt(root
->fs_info
, FRAGMENT_METADATA
) &&
1348 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1349 (btrfs_test_opt(root
->fs_info
, FRAGMENT_DATA
) &&
1350 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1355 * Requests for changes that need to be done during transaction commit.
1357 * Internal mount options that are used for special handling of the real
1358 * mount options (eg. cannot be set during remount and have to be set during
1359 * transaction commit)
1362 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1363 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1364 #define BTRFS_PENDING_COMMIT (2)
1366 #define btrfs_test_pending(info, opt) \
1367 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1368 #define btrfs_set_pending(info, opt) \
1369 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1370 #define btrfs_clear_pending(info, opt) \
1371 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1374 * Helpers for setting pending mount option changes.
1376 * Expects corresponding macros
1377 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1379 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1381 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1382 btrfs_info((info), fmt, ##args); \
1383 btrfs_set_pending((info), SET_##opt); \
1384 btrfs_clear_pending((info), CLEAR_##opt); \
1388 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1390 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1391 btrfs_info((info), fmt, ##args); \
1392 btrfs_set_pending((info), CLEAR_##opt); \
1393 btrfs_clear_pending((info), SET_##opt); \
1400 #define BTRFS_INODE_NODATASUM (1 << 0)
1401 #define BTRFS_INODE_NODATACOW (1 << 1)
1402 #define BTRFS_INODE_READONLY (1 << 2)
1403 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1404 #define BTRFS_INODE_PREALLOC (1 << 4)
1405 #define BTRFS_INODE_SYNC (1 << 5)
1406 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1407 #define BTRFS_INODE_APPEND (1 << 7)
1408 #define BTRFS_INODE_NODUMP (1 << 8)
1409 #define BTRFS_INODE_NOATIME (1 << 9)
1410 #define BTRFS_INODE_DIRSYNC (1 << 10)
1411 #define BTRFS_INODE_COMPRESS (1 << 11)
1413 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1415 struct btrfs_map_token
{
1416 struct extent_buffer
*eb
;
1418 unsigned long offset
;
1421 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1422 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1424 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1426 token
->kaddr
= NULL
;
1429 /* some macros to generate set/get functions for the struct fields. This
1430 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1433 #define le8_to_cpu(v) (v)
1434 #define cpu_to_le8(v) (v)
1437 #define read_eb_member(eb, ptr, type, member, result) ( \
1438 read_extent_buffer(eb, (char *)(result), \
1439 ((unsigned long)(ptr)) + \
1440 offsetof(type, member), \
1441 sizeof(((type *)0)->member)))
1443 #define write_eb_member(eb, ptr, type, member, result) ( \
1444 write_extent_buffer(eb, (char *)(result), \
1445 ((unsigned long)(ptr)) + \
1446 offsetof(type, member), \
1447 sizeof(((type *)0)->member)))
1449 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1450 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1451 unsigned long off, \
1452 struct btrfs_map_token *token); \
1453 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1454 unsigned long off, u##bits val, \
1455 struct btrfs_map_token *token); \
1456 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1457 unsigned long off) \
1459 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1461 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1462 unsigned long off, u##bits val) \
1464 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1467 DECLARE_BTRFS_SETGET_BITS(8)
1468 DECLARE_BTRFS_SETGET_BITS(16)
1469 DECLARE_BTRFS_SETGET_BITS(32)
1470 DECLARE_BTRFS_SETGET_BITS(64)
1472 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1473 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1475 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1476 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1478 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1481 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1482 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1484 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1485 struct btrfs_map_token *token) \
1487 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1488 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1490 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1491 type *s, u##bits val, \
1492 struct btrfs_map_token *token) \
1494 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1495 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1498 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1499 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1501 type *p = page_address(eb->pages[0]); \
1502 u##bits res = le##bits##_to_cpu(p->member); \
1505 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1508 type *p = page_address(eb->pages[0]); \
1509 p->member = cpu_to_le##bits(val); \
1512 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1513 static inline u##bits btrfs_##name(type *s) \
1515 return le##bits##_to_cpu(s->member); \
1517 static inline void btrfs_set_##name(type *s, u##bits val) \
1519 s->member = cpu_to_le##bits(val); \
1522 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1523 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1524 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1525 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1526 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1527 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1529 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1530 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1531 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1532 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1533 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1534 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1536 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1537 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1539 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1541 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1543 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1545 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1547 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1548 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1550 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1552 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1554 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1557 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1559 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1562 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1564 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1567 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1568 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1569 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1570 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1571 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1572 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1573 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1574 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1575 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1576 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1577 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1579 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1581 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1584 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1585 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1586 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1588 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1590 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1592 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1594 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1595 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1597 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1599 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1600 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1602 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1605 unsigned long offset
= (unsigned long)c
;
1606 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1607 offset
+= nr
* sizeof(struct btrfs_stripe
);
1608 return (struct btrfs_stripe
*)offset
;
1611 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1613 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1616 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1617 struct btrfs_chunk
*c
, int nr
)
1619 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1622 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1623 struct btrfs_chunk
*c
, int nr
)
1625 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1628 /* struct btrfs_block_group_item */
1629 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1631 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1633 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1634 struct btrfs_block_group_item
, chunk_objectid
, 64);
1636 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1637 struct btrfs_block_group_item
, chunk_objectid
, 64);
1638 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1639 struct btrfs_block_group_item
, flags
, 64);
1640 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1641 struct btrfs_block_group_item
, flags
, 64);
1643 /* struct btrfs_free_space_info */
1644 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1646 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1648 /* struct btrfs_inode_ref */
1649 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1650 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1652 /* struct btrfs_inode_extref */
1653 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1654 parent_objectid
, 64);
1655 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1657 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1659 /* struct btrfs_inode_item */
1660 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1661 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1662 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1663 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1664 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1665 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1666 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1667 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1668 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1669 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1670 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1671 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1672 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1674 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1676 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1678 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1679 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1681 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1683 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1684 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1685 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1686 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1687 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1688 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1689 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1690 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1691 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1692 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1694 /* struct btrfs_dev_extent */
1695 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1697 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1698 chunk_objectid
, 64);
1699 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1701 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1703 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1705 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1706 return (unsigned long)dev
+ ptr
;
1709 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1710 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1712 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1714 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1717 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1719 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1720 struct btrfs_tree_block_info
*item
,
1721 struct btrfs_disk_key
*key
)
1723 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1726 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1727 struct btrfs_tree_block_info
*item
,
1728 struct btrfs_disk_key
*key
)
1730 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1733 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1735 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1737 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1739 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1742 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1745 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1747 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1750 static inline u32
btrfs_extent_inline_ref_size(int type
)
1752 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1753 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1754 return sizeof(struct btrfs_extent_inline_ref
);
1755 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1756 return sizeof(struct btrfs_shared_data_ref
) +
1757 sizeof(struct btrfs_extent_inline_ref
);
1758 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1759 return sizeof(struct btrfs_extent_data_ref
) +
1760 offsetof(struct btrfs_extent_inline_ref
, offset
);
1765 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1766 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1768 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1769 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1771 /* struct btrfs_node */
1772 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1773 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1774 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1776 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1779 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1782 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1783 sizeof(struct btrfs_key_ptr
) * nr
;
1784 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1787 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1791 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1792 sizeof(struct btrfs_key_ptr
) * nr
;
1793 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1796 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1799 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1800 sizeof(struct btrfs_key_ptr
) * nr
;
1801 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1804 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1808 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1809 sizeof(struct btrfs_key_ptr
) * nr
;
1810 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1813 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1815 return offsetof(struct btrfs_node
, ptrs
) +
1816 sizeof(struct btrfs_key_ptr
) * nr
;
1819 void btrfs_node_key(struct extent_buffer
*eb
,
1820 struct btrfs_disk_key
*disk_key
, int nr
);
1822 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1823 struct btrfs_disk_key
*disk_key
, int nr
)
1826 ptr
= btrfs_node_key_ptr_offset(nr
);
1827 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1828 struct btrfs_key_ptr
, key
, disk_key
);
1831 /* struct btrfs_item */
1832 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1833 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1834 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1835 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1837 static inline unsigned long btrfs_item_nr_offset(int nr
)
1839 return offsetof(struct btrfs_leaf
, items
) +
1840 sizeof(struct btrfs_item
) * nr
;
1843 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1845 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1848 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1849 struct btrfs_item
*item
)
1851 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1854 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1856 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1859 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1861 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1864 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1866 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1869 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1870 struct btrfs_disk_key
*disk_key
, int nr
)
1872 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1873 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1876 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1877 struct btrfs_disk_key
*disk_key
, int nr
)
1879 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1880 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1883 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1886 * struct btrfs_root_ref
1888 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1889 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1890 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1892 /* struct btrfs_dir_item */
1893 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1894 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1895 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1896 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1897 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1898 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1900 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1902 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1905 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1906 struct btrfs_dir_item
*item
,
1907 struct btrfs_disk_key
*key
)
1909 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1912 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1913 struct btrfs_dir_item
*item
,
1914 struct btrfs_disk_key
*key
)
1916 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1919 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1921 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1923 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1926 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1927 struct btrfs_free_space_header
*h
,
1928 struct btrfs_disk_key
*key
)
1930 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1933 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1934 struct btrfs_free_space_header
*h
,
1935 struct btrfs_disk_key
*key
)
1937 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1940 /* struct btrfs_disk_key */
1941 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1943 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1944 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1946 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1947 struct btrfs_disk_key
*disk
)
1949 cpu
->offset
= le64_to_cpu(disk
->offset
);
1950 cpu
->type
= disk
->type
;
1951 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1954 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1955 struct btrfs_key
*cpu
)
1957 disk
->offset
= cpu_to_le64(cpu
->offset
);
1958 disk
->type
= cpu
->type
;
1959 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1962 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1963 struct btrfs_key
*key
, int nr
)
1965 struct btrfs_disk_key disk_key
;
1966 btrfs_node_key(eb
, &disk_key
, nr
);
1967 btrfs_disk_key_to_cpu(key
, &disk_key
);
1970 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1971 struct btrfs_key
*key
, int nr
)
1973 struct btrfs_disk_key disk_key
;
1974 btrfs_item_key(eb
, &disk_key
, nr
);
1975 btrfs_disk_key_to_cpu(key
, &disk_key
);
1978 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1979 struct btrfs_dir_item
*item
,
1980 struct btrfs_key
*key
)
1982 struct btrfs_disk_key disk_key
;
1983 btrfs_dir_item_key(eb
, item
, &disk_key
);
1984 btrfs_disk_key_to_cpu(key
, &disk_key
);
1988 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1993 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1998 /* struct btrfs_header */
1999 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2000 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2002 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2003 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2004 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2005 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2006 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2008 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2009 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2011 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2013 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2015 return (btrfs_header_flags(eb
) & flag
) == flag
;
2018 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2020 u64 flags
= btrfs_header_flags(eb
);
2021 btrfs_set_header_flags(eb
, flags
| flag
);
2022 return (flags
& flag
) == flag
;
2025 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2027 u64 flags
= btrfs_header_flags(eb
);
2028 btrfs_set_header_flags(eb
, flags
& ~flag
);
2029 return (flags
& flag
) == flag
;
2032 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2034 u64 flags
= btrfs_header_flags(eb
);
2035 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2038 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2041 u64 flags
= btrfs_header_flags(eb
);
2042 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2043 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2044 btrfs_set_header_flags(eb
, flags
);
2047 static inline unsigned long btrfs_header_fsid(void)
2049 return offsetof(struct btrfs_header
, fsid
);
2052 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2054 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2057 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2059 return btrfs_header_level(eb
) == 0;
2062 /* struct btrfs_root_item */
2063 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2065 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2066 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2067 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2069 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2071 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2072 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2073 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2074 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2075 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2076 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2077 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2078 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2080 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2082 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2084 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2086 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2088 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2091 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2093 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2096 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2098 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2101 /* struct btrfs_root_backup */
2102 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2104 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2106 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2107 tree_root_level
, 8);
2109 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2111 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2112 chunk_root_gen
, 64);
2113 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2114 chunk_root_level
, 8);
2116 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2118 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2119 extent_root_gen
, 64);
2120 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2121 extent_root_level
, 8);
2123 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2125 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2127 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2130 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2132 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2134 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2137 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2139 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2141 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2142 csum_root_level
, 8);
2143 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2145 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2147 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2150 /* struct btrfs_balance_item */
2151 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2153 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2154 struct btrfs_balance_item
*bi
,
2155 struct btrfs_disk_balance_args
*ba
)
2157 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2160 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2161 struct btrfs_balance_item
*bi
,
2162 struct btrfs_disk_balance_args
*ba
)
2164 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2167 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2168 struct btrfs_balance_item
*bi
,
2169 struct btrfs_disk_balance_args
*ba
)
2171 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2174 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2175 struct btrfs_balance_item
*bi
,
2176 struct btrfs_disk_balance_args
*ba
)
2178 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2181 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2182 struct btrfs_balance_item
*bi
,
2183 struct btrfs_disk_balance_args
*ba
)
2185 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2188 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2189 struct btrfs_balance_item
*bi
,
2190 struct btrfs_disk_balance_args
*ba
)
2192 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2196 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2197 struct btrfs_disk_balance_args
*disk
)
2199 memset(cpu
, 0, sizeof(*cpu
));
2201 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2202 cpu
->usage
= le64_to_cpu(disk
->usage
);
2203 cpu
->devid
= le64_to_cpu(disk
->devid
);
2204 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2205 cpu
->pend
= le64_to_cpu(disk
->pend
);
2206 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2207 cpu
->vend
= le64_to_cpu(disk
->vend
);
2208 cpu
->target
= le64_to_cpu(disk
->target
);
2209 cpu
->flags
= le64_to_cpu(disk
->flags
);
2210 cpu
->limit
= le64_to_cpu(disk
->limit
);
2214 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2215 struct btrfs_balance_args
*cpu
)
2217 memset(disk
, 0, sizeof(*disk
));
2219 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2220 disk
->usage
= cpu_to_le64(cpu
->usage
);
2221 disk
->devid
= cpu_to_le64(cpu
->devid
);
2222 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2223 disk
->pend
= cpu_to_le64(cpu
->pend
);
2224 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2225 disk
->vend
= cpu_to_le64(cpu
->vend
);
2226 disk
->target
= cpu_to_le64(cpu
->target
);
2227 disk
->flags
= cpu_to_le64(cpu
->flags
);
2228 disk
->limit
= cpu_to_le64(cpu
->limit
);
2231 /* struct btrfs_super_block */
2232 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2233 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2234 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2236 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2237 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2238 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2239 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2240 struct btrfs_super_block
, chunk_root_generation
, 64);
2241 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2243 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2245 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2246 chunk_root_level
, 8);
2247 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2249 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2250 log_root_transid
, 64);
2251 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2253 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2255 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2257 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2259 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2261 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2263 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2264 root_dir_objectid
, 64);
2265 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2267 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2269 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2270 compat_ro_flags
, 64);
2271 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2272 incompat_flags
, 64);
2273 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2275 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2276 cache_generation
, 64);
2277 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2278 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2279 uuid_tree_generation
, 64);
2281 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2283 u16 t
= btrfs_super_csum_type(s
);
2285 * csum type is validated at mount time
2287 return btrfs_csum_sizes
[t
];
2290 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2292 return offsetof(struct btrfs_leaf
, items
);
2295 /* struct btrfs_file_extent_item */
2296 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2297 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2298 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2299 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2300 struct btrfs_file_extent_item
, offset
, 64);
2301 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2302 struct btrfs_file_extent_item
, generation
, 64);
2303 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2304 struct btrfs_file_extent_item
, num_bytes
, 64);
2305 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2306 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2308 struct btrfs_file_extent_item
, compression
, 8);
2310 static inline unsigned long
2311 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2313 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2316 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2318 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2321 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2323 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2325 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2326 disk_num_bytes
, 64);
2327 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2329 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2331 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2333 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2335 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2337 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2338 other_encoding
, 16);
2341 * this returns the number of bytes used by the item on disk, minus the
2342 * size of any extent headers. If a file is compressed on disk, this is
2343 * the compressed size
2345 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2346 struct btrfs_item
*e
)
2348 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2351 /* this returns the number of file bytes represented by the inline item.
2352 * If an item is compressed, this is the uncompressed size
2354 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2356 struct btrfs_file_extent_item
*fi
)
2358 struct btrfs_map_token token
;
2360 btrfs_init_map_token(&token
);
2362 * return the space used on disk if this item isn't
2363 * compressed or encoded
2365 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
2366 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
2367 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
2368 return btrfs_file_extent_inline_item_len(eb
,
2369 btrfs_item_nr(slot
));
2372 /* otherwise use the ram bytes field */
2373 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
2377 /* btrfs_dev_stats_item */
2378 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2379 struct btrfs_dev_stats_item
*ptr
,
2384 read_extent_buffer(eb
, &val
,
2385 offsetof(struct btrfs_dev_stats_item
, values
) +
2386 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2391 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2392 struct btrfs_dev_stats_item
*ptr
,
2395 write_extent_buffer(eb
, &val
,
2396 offsetof(struct btrfs_dev_stats_item
, values
) +
2397 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2401 /* btrfs_qgroup_status_item */
2402 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2404 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2406 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2408 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2411 /* btrfs_qgroup_info_item */
2412 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2414 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2415 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2417 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2418 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2421 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2422 struct btrfs_qgroup_info_item
, generation
, 64);
2423 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2425 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2426 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2427 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2429 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2430 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2432 /* btrfs_qgroup_limit_item */
2433 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2435 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2437 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2439 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2441 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2444 /* btrfs_dev_replace_item */
2445 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2446 struct btrfs_dev_replace_item
, src_devid
, 64);
2447 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2448 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2450 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2452 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2454 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2456 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2457 num_write_errors
, 64);
2458 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2459 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2461 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2463 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2466 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2467 struct btrfs_dev_replace_item
, src_devid
, 64);
2468 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2469 struct btrfs_dev_replace_item
,
2470 cont_reading_from_srcdev_mode
, 64);
2471 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2472 struct btrfs_dev_replace_item
, replace_state
, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2474 struct btrfs_dev_replace_item
, time_started
, 64);
2475 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2476 struct btrfs_dev_replace_item
, time_stopped
, 64);
2477 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2478 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2479 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2480 struct btrfs_dev_replace_item
,
2481 num_uncorrectable_read_errors
, 64);
2482 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2483 struct btrfs_dev_replace_item
, cursor_left
, 64);
2484 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2485 struct btrfs_dev_replace_item
, cursor_right
, 64);
2487 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2489 return sb
->s_fs_info
;
2492 /* helper function to cast into the data area of the leaf. */
2493 #define btrfs_item_ptr(leaf, slot, type) \
2494 ((type *)(btrfs_leaf_data(leaf) + \
2495 btrfs_item_offset_nr(leaf, slot)))
2497 #define btrfs_item_ptr_offset(leaf, slot) \
2498 ((unsigned long)(btrfs_leaf_data(leaf) + \
2499 btrfs_item_offset_nr(leaf, slot)))
2501 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2503 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2504 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2507 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2509 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2514 u64
btrfs_csum_bytes_to_leaves(struct btrfs_root
*root
, u64 csum_bytes
);
2516 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2519 return root
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2523 * Doing a truncate won't result in new nodes or leaves, just what we need for
2526 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2529 return root
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2532 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
2533 struct btrfs_root
*root
);
2534 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
2535 struct btrfs_root
*root
);
2536 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2538 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2539 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2540 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2541 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2542 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2543 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2544 struct btrfs_root
*root
, unsigned long count
);
2545 int btrfs_async_run_delayed_refs(struct btrfs_root
*root
,
2546 unsigned long count
, u64 transid
, int wait
);
2547 int btrfs_lookup_data_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2548 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2549 struct btrfs_root
*root
, u64 bytenr
,
2550 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2551 int btrfs_pin_extent(struct btrfs_root
*root
,
2552 u64 bytenr
, u64 num
, int reserved
);
2553 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
2554 u64 bytenr
, u64 num_bytes
);
2555 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
2556 struct extent_buffer
*eb
);
2557 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2558 struct btrfs_root
*root
,
2559 u64 objectid
, u64 offset
, u64 bytenr
);
2560 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2561 struct btrfs_fs_info
*info
,
2563 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2564 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2565 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
2566 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2567 struct btrfs_root
*root
, u64 parent
,
2569 struct btrfs_disk_key
*key
, int level
,
2570 u64 hint
, u64 empty_size
);
2571 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2572 struct btrfs_root
*root
,
2573 struct extent_buffer
*buf
,
2574 u64 parent
, int last_ref
);
2575 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2576 struct btrfs_root
*root
,
2577 u64 root_objectid
, u64 owner
,
2578 u64 offset
, u64 ram_bytes
,
2579 struct btrfs_key
*ins
);
2580 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2581 struct btrfs_root
*root
,
2582 u64 root_objectid
, u64 owner
, u64 offset
,
2583 struct btrfs_key
*ins
);
2584 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 ram_bytes
, u64 num_bytes
,
2585 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2586 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2587 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2588 struct extent_buffer
*buf
, int full_backref
);
2589 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2590 struct extent_buffer
*buf
, int full_backref
);
2591 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2592 struct btrfs_root
*root
,
2593 u64 bytenr
, u64 num_bytes
, u64 flags
,
2594 int level
, int is_data
);
2595 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2596 struct btrfs_root
*root
,
2597 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2598 u64 owner
, u64 offset
);
2600 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
,
2602 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2603 u64 start
, u64 len
);
2604 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2605 struct btrfs_root
*root
);
2606 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2607 struct btrfs_root
*root
);
2608 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2609 struct btrfs_root
*root
,
2610 u64 bytenr
, u64 num_bytes
, u64 parent
,
2611 u64 root_objectid
, u64 owner
, u64 offset
);
2613 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2614 struct btrfs_root
*root
);
2615 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2616 struct btrfs_root
*root
);
2617 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2618 struct btrfs_root
*root
);
2619 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2620 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2621 int btrfs_read_block_groups(struct btrfs_root
*root
);
2622 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2623 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2624 struct btrfs_root
*root
, u64 bytes_used
,
2625 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2627 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2628 struct btrfs_fs_info
*fs_info
,
2629 const u64 chunk_offset
);
2630 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2631 struct btrfs_root
*root
, u64 group_start
,
2632 struct extent_map
*em
);
2633 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2634 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2635 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2636 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
2637 struct btrfs_root
*root
);
2638 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2639 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2641 enum btrfs_reserve_flush_enum
{
2642 /* If we are in the transaction, we can't flush anything.*/
2643 BTRFS_RESERVE_NO_FLUSH
,
2645 * Flushing delalloc may cause deadlock somewhere, in this
2646 * case, use FLUSH LIMIT
2648 BTRFS_RESERVE_FLUSH_LIMIT
,
2649 BTRFS_RESERVE_FLUSH_ALL
,
2652 enum btrfs_flush_state
{
2653 FLUSH_DELAYED_ITEMS_NR
= 1,
2654 FLUSH_DELAYED_ITEMS
= 2,
2656 FLUSH_DELALLOC_WAIT
= 4,
2661 int btrfs_check_data_free_space(struct inode
*inode
, u64 start
, u64 len
);
2662 int btrfs_alloc_data_chunk_ondemand(struct inode
*inode
, u64 bytes
);
2663 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 start
, u64 len
);
2664 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2666 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2667 struct btrfs_root
*root
);
2668 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2669 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2670 struct inode
*inode
);
2671 void btrfs_orphan_release_metadata(struct inode
*inode
);
2672 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2673 struct btrfs_block_rsv
*rsv
,
2675 u64
*qgroup_reserved
, bool use_global_rsv
);
2676 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
2677 struct btrfs_block_rsv
*rsv
,
2678 u64 qgroup_reserved
);
2679 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2680 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2681 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 start
, u64 len
);
2682 void btrfs_delalloc_release_space(struct inode
*inode
, u64 start
, u64 len
);
2683 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2684 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
2685 unsigned short type
);
2686 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2687 struct btrfs_block_rsv
*rsv
);
2688 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
2689 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2690 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2691 enum btrfs_reserve_flush_enum flush
);
2692 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2693 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2694 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2695 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2696 enum btrfs_reserve_flush_enum flush
);
2697 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2698 struct btrfs_block_rsv
*dst_rsv
, u64 num_bytes
,
2700 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2701 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2703 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2704 struct btrfs_block_rsv
*block_rsv
,
2706 int btrfs_inc_block_group_ro(struct btrfs_root
*root
,
2707 struct btrfs_block_group_cache
*cache
);
2708 void btrfs_dec_block_group_ro(struct btrfs_root
*root
,
2709 struct btrfs_block_group_cache
*cache
);
2710 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2711 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2712 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2713 u64 start
, u64 end
);
2714 int btrfs_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2715 u64 num_bytes
, u64
*actual_bytes
);
2716 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2717 struct btrfs_root
*root
, u64 type
);
2718 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2720 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2721 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2722 struct btrfs_fs_info
*fs_info
);
2723 int __get_raid_index(u64 flags
);
2724 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
2725 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
2726 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2727 void check_system_chunk(struct btrfs_trans_handle
*trans
,
2728 struct btrfs_root
*root
,
2730 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2731 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2734 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2735 int level
, int *slot
);
2736 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2737 int btrfs_previous_item(struct btrfs_root
*root
,
2738 struct btrfs_path
*path
, u64 min_objectid
,
2740 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2741 struct btrfs_path
*path
, u64 min_objectid
);
2742 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2743 struct btrfs_path
*path
,
2744 struct btrfs_key
*new_key
);
2745 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2746 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2747 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2748 struct btrfs_key
*key
, int lowest_level
,
2750 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2751 struct btrfs_path
*path
,
2753 enum btrfs_compare_tree_result
{
2754 BTRFS_COMPARE_TREE_NEW
,
2755 BTRFS_COMPARE_TREE_DELETED
,
2756 BTRFS_COMPARE_TREE_CHANGED
,
2757 BTRFS_COMPARE_TREE_SAME
,
2759 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2760 struct btrfs_root
*right_root
,
2761 struct btrfs_path
*left_path
,
2762 struct btrfs_path
*right_path
,
2763 struct btrfs_key
*key
,
2764 enum btrfs_compare_tree_result result
,
2766 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2767 struct btrfs_root
*right_root
,
2768 btrfs_changed_cb_t cb
, void *ctx
);
2769 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2770 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2771 struct extent_buffer
*parent
, int parent_slot
,
2772 struct extent_buffer
**cow_ret
);
2773 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2774 struct btrfs_root
*root
,
2775 struct extent_buffer
*buf
,
2776 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2777 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2778 struct extent_buffer
*buf
);
2779 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2781 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2782 u32 new_size
, int from_end
);
2783 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2784 struct btrfs_root
*root
,
2785 struct btrfs_path
*path
,
2786 struct btrfs_key
*new_key
,
2787 unsigned long split_offset
);
2788 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2789 struct btrfs_root
*root
,
2790 struct btrfs_path
*path
,
2791 struct btrfs_key
*new_key
);
2792 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2793 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2794 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2795 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2797 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
2798 struct btrfs_path
*p
, u64 time_seq
);
2799 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2800 struct btrfs_key
*key
, struct btrfs_path
*p
,
2801 int find_higher
, int return_any
);
2802 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2803 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2804 int start_slot
, u64
*last_ret
,
2805 struct btrfs_key
*progress
);
2806 void btrfs_release_path(struct btrfs_path
*p
);
2807 struct btrfs_path
*btrfs_alloc_path(void);
2808 void btrfs_free_path(struct btrfs_path
*p
);
2809 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2810 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2811 struct extent_buffer
*held
, int held_rw
);
2812 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2814 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2815 struct btrfs_path
*path
, int slot
, int nr
);
2816 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2817 struct btrfs_root
*root
,
2818 struct btrfs_path
*path
)
2820 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2823 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2824 struct btrfs_key
*cpu_key
, u32
*data_size
,
2825 u32 total_data
, u32 total_size
, int nr
);
2826 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2827 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2828 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2829 struct btrfs_root
*root
,
2830 struct btrfs_path
*path
,
2831 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2833 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2834 struct btrfs_root
*root
,
2835 struct btrfs_path
*path
,
2836 struct btrfs_key
*key
,
2839 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2842 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2843 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2844 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2846 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2847 struct btrfs_path
*p
, u64 time_seq
)
2850 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2851 return btrfs_next_old_leaf(root
, p
, time_seq
);
2854 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2856 return btrfs_next_old_item(root
, p
, 0);
2858 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2859 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2860 struct btrfs_block_rsv
*block_rsv
,
2861 int update_ref
, int for_reloc
);
2862 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2863 struct btrfs_root
*root
,
2864 struct extent_buffer
*node
,
2865 struct extent_buffer
*parent
);
2866 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2869 * Get synced with close_ctree()
2872 return fs_info
->closing
;
2876 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2877 * anything except sleeping. This function is used to check the status of
2880 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
2882 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
2883 btrfs_fs_closing(root
->fs_info
));
2886 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2888 kfree(fs_info
->balance_ctl
);
2889 kfree(fs_info
->delayed_root
);
2890 kfree(fs_info
->extent_root
);
2891 kfree(fs_info
->tree_root
);
2892 kfree(fs_info
->chunk_root
);
2893 kfree(fs_info
->dev_root
);
2894 kfree(fs_info
->csum_root
);
2895 kfree(fs_info
->quota_root
);
2896 kfree(fs_info
->uuid_root
);
2897 kfree(fs_info
->free_space_root
);
2898 kfree(fs_info
->super_copy
);
2899 kfree(fs_info
->super_for_commit
);
2900 security_free_mnt_opts(&fs_info
->security_opts
);
2904 /* tree mod log functions from ctree.c */
2905 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2906 struct seq_list
*elem
);
2907 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2908 struct seq_list
*elem
);
2909 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2912 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2913 struct btrfs_root
*tree_root
,
2914 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2915 const char *name
, int name_len
);
2916 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2917 struct btrfs_root
*tree_root
,
2918 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2919 const char *name
, int name_len
);
2920 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2921 struct btrfs_key
*key
);
2922 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2923 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2925 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2926 struct btrfs_root
*root
,
2927 struct btrfs_key
*key
,
2928 struct btrfs_root_item
*item
);
2929 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
2930 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
2931 struct btrfs_key
*root_key
);
2932 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2933 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2934 struct extent_buffer
*node
);
2935 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2936 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
2937 struct btrfs_root
*root
);
2940 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
2941 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2943 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
2944 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2946 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
2947 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
2951 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
2952 const char *name
, int name_len
);
2953 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2954 struct btrfs_root
*root
, const char *name
,
2955 int name_len
, struct inode
*dir
,
2956 struct btrfs_key
*location
, u8 type
, u64 index
);
2957 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2958 struct btrfs_root
*root
,
2959 struct btrfs_path
*path
, u64 dir
,
2960 const char *name
, int name_len
,
2962 struct btrfs_dir_item
*
2963 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2964 struct btrfs_root
*root
,
2965 struct btrfs_path
*path
, u64 dir
,
2966 u64 objectid
, const char *name
, int name_len
,
2968 struct btrfs_dir_item
*
2969 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2970 struct btrfs_path
*path
, u64 dirid
,
2971 const char *name
, int name_len
);
2972 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2973 struct btrfs_root
*root
,
2974 struct btrfs_path
*path
,
2975 struct btrfs_dir_item
*di
);
2976 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2977 struct btrfs_root
*root
,
2978 struct btrfs_path
*path
, u64 objectid
,
2979 const char *name
, u16 name_len
,
2980 const void *data
, u16 data_len
);
2981 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2982 struct btrfs_root
*root
,
2983 struct btrfs_path
*path
, u64 dir
,
2984 const char *name
, u16 name_len
,
2986 int verify_dir_item(struct btrfs_root
*root
,
2987 struct extent_buffer
*leaf
,
2988 struct btrfs_dir_item
*dir_item
);
2989 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2990 struct btrfs_path
*path
,
2995 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2996 struct btrfs_root
*root
, u64 offset
);
2997 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2998 struct btrfs_root
*root
, u64 offset
);
2999 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3002 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3003 struct btrfs_root
*root
,
3004 const char *name
, int name_len
,
3005 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3006 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3007 struct btrfs_root
*root
,
3008 const char *name
, int name_len
,
3009 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3010 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3011 struct btrfs_root
*root
,
3012 struct btrfs_path
*path
, u64 objectid
);
3013 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3014 *root
, struct btrfs_path
*path
,
3015 struct btrfs_key
*location
, int mod
);
3017 struct btrfs_inode_extref
*
3018 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3019 struct btrfs_root
*root
,
3020 struct btrfs_path
*path
,
3021 const char *name
, int name_len
,
3022 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3025 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3026 u64 ref_objectid
, const char *name
,
3028 struct btrfs_inode_extref
**extref_ret
);
3031 struct btrfs_dio_private
;
3032 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3033 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3034 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3035 struct bio
*bio
, u32
*dst
);
3036 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3037 struct bio
*bio
, u64 logical_offset
);
3038 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3039 struct btrfs_root
*root
,
3040 u64 objectid
, u64 pos
,
3041 u64 disk_offset
, u64 disk_num_bytes
,
3042 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3043 u8 compression
, u8 encryption
, u16 other_encoding
);
3044 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3045 struct btrfs_root
*root
,
3046 struct btrfs_path
*path
, u64 objectid
,
3047 u64 bytenr
, int mod
);
3048 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3049 struct btrfs_root
*root
,
3050 struct btrfs_ordered_sum
*sums
);
3051 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3052 struct bio
*bio
, u64 file_start
, int contig
);
3053 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3054 struct list_head
*list
, int search_commit
);
3055 void btrfs_extent_item_to_extent_map(struct inode
*inode
,
3056 const struct btrfs_path
*path
,
3057 struct btrfs_file_extent_item
*fi
,
3058 const bool new_inline
,
3059 struct extent_map
*em
);
3062 struct btrfs_delalloc_work
{
3063 struct inode
*inode
;
3065 struct completion completion
;
3066 struct list_head list
;
3067 struct btrfs_work work
;
3070 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3072 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3074 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3075 size_t pg_offset
, u64 start
, u64 len
,
3077 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3078 u64
*orig_start
, u64
*orig_block_len
,
3081 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3082 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3083 #define ClearPageChecked ClearPageFsMisc
3084 #define SetPageChecked SetPageFsMisc
3085 #define PageChecked PageFsMisc
3088 /* This forces readahead on a given range of bytes in an inode */
3089 static inline void btrfs_force_ra(struct address_space
*mapping
,
3090 struct file_ra_state
*ra
, struct file
*file
,
3091 pgoff_t offset
, unsigned long req_size
)
3093 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3096 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3097 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3098 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3099 struct btrfs_root
*root
,
3100 struct inode
*dir
, struct inode
*inode
,
3101 const char *name
, int name_len
);
3102 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3103 struct inode
*parent_inode
, struct inode
*inode
,
3104 const char *name
, int name_len
, int add_backref
, u64 index
);
3105 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3106 struct btrfs_root
*root
,
3107 struct inode
*dir
, u64 objectid
,
3108 const char *name
, int name_len
);
3109 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3111 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3112 struct btrfs_root
*root
,
3113 struct inode
*inode
, u64 new_size
,
3116 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3117 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3119 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3120 struct extent_state
**cached_state
);
3121 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3122 struct btrfs_root
*new_root
,
3123 struct btrfs_root
*parent_root
,
3125 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3126 size_t size
, struct bio
*bio
,
3127 unsigned long bio_flags
);
3128 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3129 int btrfs_readpage(struct file
*file
, struct page
*page
);
3130 void btrfs_evict_inode(struct inode
*inode
);
3131 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3132 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3133 void btrfs_destroy_inode(struct inode
*inode
);
3134 int btrfs_drop_inode(struct inode
*inode
);
3135 int btrfs_init_cachep(void);
3136 void btrfs_destroy_cachep(void);
3137 long btrfs_ioctl_trans_end(struct file
*file
);
3138 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3139 struct btrfs_root
*root
, int *was_new
);
3140 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3141 size_t pg_offset
, u64 start
, u64 end
,
3143 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3144 struct btrfs_root
*root
,
3145 struct inode
*inode
);
3146 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3147 struct btrfs_root
*root
, struct inode
*inode
);
3148 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3149 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3150 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3151 struct btrfs_root
*root
);
3152 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3153 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3154 void btrfs_add_delayed_iput(struct inode
*inode
);
3155 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3156 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3157 u64 start
, u64 num_bytes
, u64 min_size
,
3158 loff_t actual_len
, u64
*alloc_hint
);
3159 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3160 struct btrfs_trans_handle
*trans
, int mode
,
3161 u64 start
, u64 num_bytes
, u64 min_size
,
3162 loff_t actual_len
, u64
*alloc_hint
);
3163 int btrfs_inode_check_errors(struct inode
*inode
);
3164 extern const struct dentry_operations btrfs_dentry_operations
;
3165 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3166 void btrfs_test_inode_set_ops(struct inode
*inode
);
3170 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3171 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3172 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3173 void btrfs_update_iflags(struct inode
*inode
);
3174 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3175 int btrfs_is_empty_uuid(u8
*uuid
);
3176 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3177 struct btrfs_ioctl_defrag_range_args
*range
,
3178 u64 newer_than
, unsigned long max_pages
);
3179 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3180 struct btrfs_ioctl_space_info
*space
);
3181 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3182 struct btrfs_ioctl_balance_args
*bargs
);
3183 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
3184 struct file
*dst_file
, u64 dst_loff
);
3187 int btrfs_auto_defrag_init(void);
3188 void btrfs_auto_defrag_exit(void);
3189 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3190 struct inode
*inode
);
3191 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3192 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3193 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3194 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3196 extern const struct file_operations btrfs_file_operations
;
3197 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3198 struct btrfs_root
*root
, struct inode
*inode
,
3199 struct btrfs_path
*path
, u64 start
, u64 end
,
3200 u64
*drop_end
, int drop_cache
,
3202 u32 extent_item_size
,
3204 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3205 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3206 u64 end
, int drop_cache
);
3207 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3208 struct inode
*inode
, u64 start
, u64 end
);
3209 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3210 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3211 struct page
**pages
, size_t num_pages
,
3212 loff_t pos
, size_t write_bytes
,
3213 struct extent_state
**cached
);
3214 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3215 ssize_t
btrfs_copy_file_range(struct file
*file_in
, loff_t pos_in
,
3216 struct file
*file_out
, loff_t pos_out
,
3217 size_t len
, unsigned int flags
);
3218 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
3219 struct file
*file_out
, loff_t pos_out
, u64 len
);
3222 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3223 struct btrfs_root
*root
);
3226 int btrfs_init_sysfs(void);
3227 void btrfs_exit_sysfs(void);
3228 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3229 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3232 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3235 int btrfs_parse_options(struct btrfs_root
*root
, char *options
,
3236 unsigned long new_flags
);
3237 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3239 #ifdef CONFIG_PRINTK
3241 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3243 static inline __printf(2, 3)
3244 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3249 #define btrfs_emerg(fs_info, fmt, args...) \
3250 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3251 #define btrfs_alert(fs_info, fmt, args...) \
3252 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3253 #define btrfs_crit(fs_info, fmt, args...) \
3254 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3255 #define btrfs_err(fs_info, fmt, args...) \
3256 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3257 #define btrfs_warn(fs_info, fmt, args...) \
3258 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3259 #define btrfs_notice(fs_info, fmt, args...) \
3260 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3261 #define btrfs_info(fs_info, fmt, args...) \
3262 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3265 * Wrappers that use printk_in_rcu
3267 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3268 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3269 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3270 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3271 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3272 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3273 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3274 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3275 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3276 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3277 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3278 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3279 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3280 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3283 * Wrappers that use a ratelimited printk_in_rcu
3285 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3286 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3287 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3288 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3289 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3290 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3291 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3292 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3293 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3294 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3295 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3296 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3297 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3298 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3301 * Wrappers that use a ratelimited printk
3303 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3304 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3305 #define btrfs_alert_rl(fs_info, fmt, args...) \
3306 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3307 #define btrfs_crit_rl(fs_info, fmt, args...) \
3308 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3309 #define btrfs_err_rl(fs_info, fmt, args...) \
3310 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3311 #define btrfs_warn_rl(fs_info, fmt, args...) \
3312 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3313 #define btrfs_notice_rl(fs_info, fmt, args...) \
3314 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3315 #define btrfs_info_rl(fs_info, fmt, args...) \
3316 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3318 #define btrfs_debug(fs_info, fmt, args...) \
3319 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3320 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3321 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3322 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3323 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3324 #define btrfs_debug_rl(fs_info, fmt, args...) \
3325 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3327 #define btrfs_debug(fs_info, fmt, args...) \
3328 no_printk(KERN_DEBUG fmt, ##args)
3329 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3330 no_printk(KERN_DEBUG fmt, ##args)
3331 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3332 no_printk(KERN_DEBUG fmt, ##args)
3333 #define btrfs_debug_rl(fs_info, fmt, args...) \
3334 no_printk(KERN_DEBUG fmt, ##args)
3337 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3340 btrfs_printk(fs_info, fmt, ##args); \
3341 rcu_read_unlock(); \
3344 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3346 static DEFINE_RATELIMIT_STATE(_rs, \
3347 DEFAULT_RATELIMIT_INTERVAL, \
3348 DEFAULT_RATELIMIT_BURST); \
3349 if (__ratelimit(&_rs)) \
3350 btrfs_printk(fs_info, fmt, ##args); \
3353 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3356 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3357 rcu_read_unlock(); \
3360 #ifdef CONFIG_BTRFS_ASSERT
3363 static inline void assfail(char *expr
, char *file
, int line
)
3365 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3370 #define ASSERT(expr) \
3371 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3373 #define ASSERT(expr) ((void)0)
3378 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3379 unsigned int line
, int errno
, const char *fmt
, ...);
3381 const char *btrfs_decode_error(int errno
);
3384 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3385 const char *function
,
3386 unsigned int line
, int errno
);
3389 * Call btrfs_abort_transaction as early as possible when an error condition is
3390 * detected, that way the exact line number is reported.
3392 #define btrfs_abort_transaction(trans, errno) \
3394 /* Report first abort since mount */ \
3395 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3396 &((trans)->fs_info->fs_state))) { \
3397 WARN(1, KERN_DEBUG \
3398 "BTRFS: Transaction aborted (error %d)\n", \
3401 __btrfs_abort_transaction((trans), __func__, \
3402 __LINE__, (errno)); \
3405 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3407 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3408 (errno), fmt, ##args); \
3413 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3414 unsigned int line
, int errno
, const char *fmt
, ...);
3416 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3417 * will panic(). Otherwise we BUG() here.
3419 #define btrfs_panic(fs_info, errno, fmt, args...) \
3421 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3426 /* compatibility and incompatibility defines */
3428 #define btrfs_set_fs_incompat(__fs_info, opt) \
3429 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3431 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3434 struct btrfs_super_block
*disk_super
;
3437 disk_super
= fs_info
->super_copy
;
3438 features
= btrfs_super_incompat_flags(disk_super
);
3439 if (!(features
& flag
)) {
3440 spin_lock(&fs_info
->super_lock
);
3441 features
= btrfs_super_incompat_flags(disk_super
);
3442 if (!(features
& flag
)) {
3444 btrfs_set_super_incompat_flags(disk_super
, features
);
3445 btrfs_info(fs_info
, "setting %llu feature flag",
3448 spin_unlock(&fs_info
->super_lock
);
3452 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3453 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3455 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3458 struct btrfs_super_block
*disk_super
;
3461 disk_super
= fs_info
->super_copy
;
3462 features
= btrfs_super_incompat_flags(disk_super
);
3463 if (features
& flag
) {
3464 spin_lock(&fs_info
->super_lock
);
3465 features
= btrfs_super_incompat_flags(disk_super
);
3466 if (features
& flag
) {
3468 btrfs_set_super_incompat_flags(disk_super
, features
);
3469 btrfs_info(fs_info
, "clearing %llu feature flag",
3472 spin_unlock(&fs_info
->super_lock
);
3476 #define btrfs_fs_incompat(fs_info, opt) \
3477 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3479 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3481 struct btrfs_super_block
*disk_super
;
3482 disk_super
= fs_info
->super_copy
;
3483 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3486 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3487 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3489 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3492 struct btrfs_super_block
*disk_super
;
3495 disk_super
= fs_info
->super_copy
;
3496 features
= btrfs_super_compat_ro_flags(disk_super
);
3497 if (!(features
& flag
)) {
3498 spin_lock(&fs_info
->super_lock
);
3499 features
= btrfs_super_compat_ro_flags(disk_super
);
3500 if (!(features
& flag
)) {
3502 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3503 btrfs_info(fs_info
, "setting %llu ro feature flag",
3506 spin_unlock(&fs_info
->super_lock
);
3510 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3511 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3513 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3516 struct btrfs_super_block
*disk_super
;
3519 disk_super
= fs_info
->super_copy
;
3520 features
= btrfs_super_compat_ro_flags(disk_super
);
3521 if (features
& flag
) {
3522 spin_lock(&fs_info
->super_lock
);
3523 features
= btrfs_super_compat_ro_flags(disk_super
);
3524 if (features
& flag
) {
3526 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3527 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3530 spin_unlock(&fs_info
->super_lock
);
3534 #define btrfs_fs_compat_ro(fs_info, opt) \
3535 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3537 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3539 struct btrfs_super_block
*disk_super
;
3540 disk_super
= fs_info
->super_copy
;
3541 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3545 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3546 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3547 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3548 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3549 struct inode
*inode
, struct inode
*dir
);
3551 #define btrfs_get_acl NULL
3552 #define btrfs_set_acl NULL
3553 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3554 struct inode
*inode
, struct inode
*dir
)
3561 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3562 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3563 struct btrfs_root
*root
);
3564 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3565 struct btrfs_root
*root
);
3566 int btrfs_recover_relocation(struct btrfs_root
*root
);
3567 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3568 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3569 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3570 struct extent_buffer
*cow
);
3571 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3572 u64
*bytes_to_reserve
);
3573 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3574 struct btrfs_pending_snapshot
*pending
);
3577 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3578 u64 end
, struct btrfs_scrub_progress
*progress
,
3579 int readonly
, int is_dev_replace
);
3580 void btrfs_scrub_pause(struct btrfs_root
*root
);
3581 void btrfs_scrub_continue(struct btrfs_root
*root
);
3582 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3583 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3584 struct btrfs_device
*dev
);
3585 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3586 struct btrfs_scrub_progress
*progress
);
3589 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3590 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3591 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3593 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3595 btrfs_bio_counter_sub(fs_info
, 1);
3599 struct reada_control
{
3600 struct btrfs_root
*root
; /* tree to prefetch */
3601 struct btrfs_key key_start
;
3602 struct btrfs_key key_end
; /* exclusive */
3605 wait_queue_head_t wait
;
3607 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3608 struct btrfs_key
*start
, struct btrfs_key
*end
);
3609 int btrfs_reada_wait(void *handle
);
3610 void btrfs_reada_detach(void *handle
);
3611 int btree_readahead_hook(struct btrfs_fs_info
*fs_info
,
3612 struct extent_buffer
*eb
, u64 start
, int err
);
3614 static inline int is_fstree(u64 rootid
)
3616 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3617 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3618 !btrfs_qgroup_level(rootid
)))
3623 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3625 return signal_pending(current
);
3628 /* Sanity test specific functions */
3629 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3630 void btrfs_test_destroy_inode(struct inode
*inode
);
3633 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3635 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3636 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
,
3637 &fs_info
->fs_state
)))