2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include <linux/btrfs_tree.h>
37 #include <linux/workqueue.h>
38 #include <linux/security.h>
39 #include <linux/sizes.h>
40 #include "extent_io.h"
41 #include "extent_map.h"
42 #include "async-thread.h"
44 struct btrfs_trans_handle
;
45 struct btrfs_transaction
;
46 struct btrfs_pending_snapshot
;
47 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
48 extern struct kmem_cache
*btrfs_transaction_cachep
;
49 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
50 extern struct kmem_cache
*btrfs_path_cachep
;
51 extern struct kmem_cache
*btrfs_free_space_cachep
;
52 struct btrfs_ordered_sum
;
54 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
55 #define STATIC noinline
57 #define STATIC static noinline
60 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
62 #define BTRFS_MAX_MIRRORS 3
64 #define BTRFS_MAX_LEVEL 8
66 #define BTRFS_COMPAT_EXTENT_TREE_V0
69 * the max metadata block size. This limit is somewhat artificial,
70 * but the memmove costs go through the roof for larger blocks.
72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
75 * we can actually store much bigger names, but lets not confuse the rest
78 #define BTRFS_NAME_LEN 255
81 * Theoretical limit is larger, but we keep this down to a sane
82 * value. That should limit greatly the possibility of collisions on
85 #define BTRFS_LINK_MAX 65535U
87 static const int btrfs_csum_sizes
[] = { 4 };
89 /* four bytes for CRC32 */
90 #define BTRFS_EMPTY_DIR_SIZE 0
92 /* specific to btrfs_map_block(), therefore not in include/linux/blk_types.h */
93 #define REQ_GET_READ_MIRRORS (1 << 30)
95 /* ioprio of readahead is set to idle */
96 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
98 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
100 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
102 struct btrfs_mapping_tree
{
103 struct extent_map_tree map_tree
;
106 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
108 BUG_ON(num_stripes
== 0);
109 return sizeof(struct btrfs_chunk
) +
110 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
116 #define BTRFS_FS_STATE_ERROR 0
117 #define BTRFS_FS_STATE_REMOUNTING 1
118 #define BTRFS_FS_STATE_TRANS_ABORTED 2
119 #define BTRFS_FS_STATE_DEV_REPLACING 3
121 #define BTRFS_BACKREF_REV_MAX 256
122 #define BTRFS_BACKREF_REV_SHIFT 56
123 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
124 BTRFS_BACKREF_REV_SHIFT)
126 #define BTRFS_OLD_BACKREF_REV 0
127 #define BTRFS_MIXED_BACKREF_REV 1
130 * every tree block (leaf or node) starts with this header.
132 struct btrfs_header
{
133 /* these first four must match the super block */
134 u8 csum
[BTRFS_CSUM_SIZE
];
135 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
136 __le64 bytenr
; /* which block this node is supposed to live in */
139 /* allowed to be different from the super from here on down */
140 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
145 } __attribute__ ((__packed__
));
147 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
148 sizeof(struct btrfs_header)) / \
149 sizeof(struct btrfs_key_ptr))
150 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
151 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
152 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
153 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
154 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
155 sizeof(struct btrfs_item) - \
156 BTRFS_FILE_EXTENT_INLINE_DATA_START)
157 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
158 sizeof(struct btrfs_item) -\
159 sizeof(struct btrfs_dir_item))
163 * this is a very generous portion of the super block, giving us
164 * room to translate 14 chunks with 3 stripes each.
166 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
169 * just in case we somehow lose the roots and are not able to mount,
170 * we store an array of the roots from previous transactions
173 #define BTRFS_NUM_BACKUP_ROOTS 4
174 struct btrfs_root_backup
{
176 __le64 tree_root_gen
;
179 __le64 chunk_root_gen
;
182 __le64 extent_root_gen
;
191 __le64 csum_root_gen
;
201 u8 extent_root_level
;
205 /* future and to align */
207 } __attribute__ ((__packed__
));
210 * the super block basically lists the main trees of the FS
211 * it currently lacks any block count etc etc
213 struct btrfs_super_block
{
214 u8 csum
[BTRFS_CSUM_SIZE
];
215 /* the first 4 fields must match struct btrfs_header */
216 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
217 __le64 bytenr
; /* this block number */
220 /* allowed to be different from the btrfs_header from here own down */
227 /* this will help find the new super based on the log root */
228 __le64 log_root_transid
;
231 __le64 root_dir_objectid
;
235 __le32 __unused_leafsize
;
237 __le32 sys_chunk_array_size
;
238 __le64 chunk_root_generation
;
240 __le64 compat_ro_flags
;
241 __le64 incompat_flags
;
246 struct btrfs_dev_item dev_item
;
248 char label
[BTRFS_LABEL_SIZE
];
250 __le64 cache_generation
;
251 __le64 uuid_tree_generation
;
253 /* future expansion */
255 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
256 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
257 } __attribute__ ((__packed__
));
260 * Compat flags that we support. If any incompat flags are set other than the
261 * ones specified below then we will fail to mount
263 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
264 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
265 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
267 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
268 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
270 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
271 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
273 #define BTRFS_FEATURE_INCOMPAT_SUPP \
274 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
275 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
276 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
277 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
278 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
279 BTRFS_FEATURE_INCOMPAT_RAID56 | \
280 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
281 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
282 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
284 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
285 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
286 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
289 * A leaf is full of items. offset and size tell us where to find
290 * the item in the leaf (relative to the start of the data area)
293 struct btrfs_disk_key key
;
296 } __attribute__ ((__packed__
));
299 * leaves have an item area and a data area:
300 * [item0, item1....itemN] [free space] [dataN...data1, data0]
302 * The data is separate from the items to get the keys closer together
306 struct btrfs_header header
;
307 struct btrfs_item items
[];
308 } __attribute__ ((__packed__
));
311 * all non-leaf blocks are nodes, they hold only keys and pointers to
314 struct btrfs_key_ptr
{
315 struct btrfs_disk_key key
;
318 } __attribute__ ((__packed__
));
321 struct btrfs_header header
;
322 struct btrfs_key_ptr ptrs
[];
323 } __attribute__ ((__packed__
));
326 * btrfs_paths remember the path taken from the root down to the leaf.
327 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
328 * to any other levels that are present.
330 * The slots array records the index of the item or block pointer
331 * used while walking the tree.
333 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
335 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
336 int slots
[BTRFS_MAX_LEVEL
];
337 /* if there is real range locking, this locks field will change */
338 u8 locks
[BTRFS_MAX_LEVEL
];
340 /* keep some upper locks as we walk down */
344 * set by btrfs_split_item, tells search_slot to keep all locks
345 * and to force calls to keep space in the nodes
347 unsigned int search_for_split
:1;
348 unsigned int keep_locks
:1;
349 unsigned int skip_locking
:1;
350 unsigned int leave_spinning
:1;
351 unsigned int search_commit_root
:1;
352 unsigned int need_commit_sem
:1;
353 unsigned int skip_release_on_error
:1;
355 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
356 sizeof(struct btrfs_item))
357 struct btrfs_dev_replace
{
358 u64 replace_state
; /* see #define above */
359 u64 time_started
; /* seconds since 1-Jan-1970 */
360 u64 time_stopped
; /* seconds since 1-Jan-1970 */
361 atomic64_t num_write_errors
;
362 atomic64_t num_uncorrectable_read_errors
;
365 u64 committed_cursor_left
;
366 u64 cursor_left_last_write_of_item
;
369 u64 cont_reading_from_srcdev_mode
; /* see #define above */
372 int item_needs_writeback
;
373 struct btrfs_device
*srcdev
;
374 struct btrfs_device
*tgtdev
;
377 atomic_t nesting_level
;
378 struct mutex lock_finishing_cancel_unmount
;
381 atomic_t blocking_readers
;
382 wait_queue_head_t read_lock_wq
;
384 struct btrfs_scrub_progress scrub_progress
;
387 /* For raid type sysfs entries */
388 struct raid_kobject
{
393 struct btrfs_space_info
{
396 u64 total_bytes
; /* total bytes in the space,
397 this doesn't take mirrors into account */
398 u64 bytes_used
; /* total bytes used,
399 this doesn't take mirrors into account */
400 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
401 transaction finishes */
402 u64 bytes_reserved
; /* total bytes the allocator has reserved for
403 current allocations */
404 u64 bytes_may_use
; /* number of bytes that may be used for
405 delalloc/allocations */
406 u64 bytes_readonly
; /* total bytes that are read only */
408 u64 max_extent_size
; /* This will hold the maximum extent size of
409 the space info if we had an ENOSPC in the
412 unsigned int full
:1; /* indicates that we cannot allocate any more
413 chunks for this space */
414 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
416 unsigned int flush
:1; /* set if we are trying to make space */
418 unsigned int force_alloc
; /* set if we need to force a chunk
419 alloc for this space */
421 u64 disk_used
; /* total bytes used on disk */
422 u64 disk_total
; /* total bytes on disk, takes mirrors into
428 * bytes_pinned is kept in line with what is actually pinned, as in
429 * we've called update_block_group and dropped the bytes_used counter
430 * and increased the bytes_pinned counter. However this means that
431 * bytes_pinned does not reflect the bytes that will be pinned once the
432 * delayed refs are flushed, so this counter is inc'ed every time we
433 * call btrfs_free_extent so it is a realtime count of what will be
434 * freed once the transaction is committed. It will be zeroed every
435 * time the transaction commits.
437 struct percpu_counter total_bytes_pinned
;
439 struct list_head list
;
440 /* Protected by the spinlock 'lock'. */
441 struct list_head ro_bgs
;
442 struct list_head priority_tickets
;
443 struct list_head tickets
;
445 struct rw_semaphore groups_sem
;
446 /* for block groups in our same type */
447 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
448 wait_queue_head_t wait
;
451 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
454 #define BTRFS_BLOCK_RSV_GLOBAL 1
455 #define BTRFS_BLOCK_RSV_DELALLOC 2
456 #define BTRFS_BLOCK_RSV_TRANS 3
457 #define BTRFS_BLOCK_RSV_CHUNK 4
458 #define BTRFS_BLOCK_RSV_DELOPS 5
459 #define BTRFS_BLOCK_RSV_EMPTY 6
460 #define BTRFS_BLOCK_RSV_TEMP 7
462 struct btrfs_block_rsv
{
465 struct btrfs_space_info
*space_info
;
469 unsigned short failfast
;
473 * free clusters are used to claim free space in relatively large chunks,
474 * allowing us to do less seeky writes. They are used for all metadata
475 * allocations and data allocations in ssd mode.
477 struct btrfs_free_cluster
{
479 spinlock_t refill_lock
;
482 /* largest extent in this cluster */
485 /* first extent starting offset */
488 /* We did a full search and couldn't create a cluster */
491 struct btrfs_block_group_cache
*block_group
;
493 * when a cluster is allocated from a block group, we put the
494 * cluster onto a list in the block group so that it can
495 * be freed before the block group is freed.
497 struct list_head block_group_list
;
500 enum btrfs_caching_type
{
502 BTRFS_CACHE_STARTED
= 1,
503 BTRFS_CACHE_FAST
= 2,
504 BTRFS_CACHE_FINISHED
= 3,
505 BTRFS_CACHE_ERROR
= 4,
508 enum btrfs_disk_cache_state
{
509 BTRFS_DC_WRITTEN
= 0,
515 struct btrfs_caching_control
{
516 struct list_head list
;
518 wait_queue_head_t wait
;
519 struct btrfs_work work
;
520 struct btrfs_block_group_cache
*block_group
;
525 /* Once caching_thread() finds this much free space, it will wake up waiters. */
526 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
528 struct btrfs_io_ctl
{
532 struct btrfs_root
*root
;
539 unsigned check_crcs
:1;
542 struct btrfs_block_group_cache
{
543 struct btrfs_key key
;
544 struct btrfs_block_group_item item
;
545 struct btrfs_fs_info
*fs_info
;
553 u64 cache_generation
;
557 * If the free space extent count exceeds this number, convert the block
560 u32 bitmap_high_thresh
;
563 * If the free space extent count drops below this number, convert the
564 * block group back to extents.
566 u32 bitmap_low_thresh
;
569 * It is just used for the delayed data space allocation because
570 * only the data space allocation and the relative metadata update
571 * can be done cross the transaction.
573 struct rw_semaphore data_rwsem
;
575 /* for raid56, this is a full stripe, without parity */
576 unsigned long full_stripe_len
;
580 unsigned int has_caching_ctl
:1;
581 unsigned int removed
:1;
583 int disk_cache_state
;
585 /* cache tracking stuff */
587 struct btrfs_caching_control
*caching_ctl
;
588 u64 last_byte_to_unpin
;
590 struct btrfs_space_info
*space_info
;
592 /* free space cache stuff */
593 struct btrfs_free_space_ctl
*free_space_ctl
;
595 /* block group cache stuff */
596 struct rb_node cache_node
;
598 /* for block groups in the same raid type */
599 struct list_head list
;
604 /* List of struct btrfs_free_clusters for this block group.
605 * Today it will only have one thing on it, but that may change
607 struct list_head cluster_list
;
609 /* For delayed block group creation or deletion of empty block groups */
610 struct list_head bg_list
;
612 /* For read-only block groups */
613 struct list_head ro_list
;
617 /* For dirty block groups */
618 struct list_head dirty_list
;
619 struct list_head io_list
;
621 struct btrfs_io_ctl io_ctl
;
624 * Incremented when doing extent allocations and holding a read lock
625 * on the space_info's groups_sem semaphore.
626 * Decremented when an ordered extent that represents an IO against this
627 * block group's range is created (after it's added to its inode's
628 * root's list of ordered extents) or immediately after the allocation
629 * if it's a metadata extent or fallocate extent (for these cases we
630 * don't create ordered extents).
632 atomic_t reservations
;
635 * Incremented while holding the spinlock *lock* by a task checking if
636 * it can perform a nocow write (incremented if the value for the *ro*
637 * field is 0). Decremented by such tasks once they create an ordered
638 * extent or before that if some error happens before reaching that step.
639 * This is to prevent races between block group relocation and nocow
640 * writes through direct IO.
642 atomic_t nocow_writers
;
644 /* Lock for free space tree operations. */
645 struct mutex free_space_lock
;
648 * Does the block group need to be added to the free space tree?
649 * Protected by free_space_lock.
651 int needs_free_space
;
654 /* delayed seq elem */
656 struct list_head list
;
660 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
662 enum btrfs_orphan_cleanup_state
{
663 ORPHAN_CLEANUP_STARTED
= 1,
664 ORPHAN_CLEANUP_DONE
= 2,
667 /* used by the raid56 code to lock stripes for read/modify/write */
668 struct btrfs_stripe_hash
{
669 struct list_head hash_list
;
670 wait_queue_head_t wait
;
674 /* used by the raid56 code to lock stripes for read/modify/write */
675 struct btrfs_stripe_hash_table
{
676 struct list_head stripe_cache
;
677 spinlock_t cache_lock
;
679 struct btrfs_stripe_hash table
[];
682 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
684 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
687 struct reloc_control
;
689 struct btrfs_fs_devices
;
690 struct btrfs_balance_control
;
691 struct btrfs_delayed_root
;
692 struct btrfs_fs_info
{
693 u8 fsid
[BTRFS_FSID_SIZE
];
694 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
695 struct btrfs_root
*extent_root
;
696 struct btrfs_root
*tree_root
;
697 struct btrfs_root
*chunk_root
;
698 struct btrfs_root
*dev_root
;
699 struct btrfs_root
*fs_root
;
700 struct btrfs_root
*csum_root
;
701 struct btrfs_root
*quota_root
;
702 struct btrfs_root
*uuid_root
;
703 struct btrfs_root
*free_space_root
;
705 /* the log root tree is a directory of all the other log roots */
706 struct btrfs_root
*log_root_tree
;
708 spinlock_t fs_roots_radix_lock
;
709 struct radix_tree_root fs_roots_radix
;
711 /* block group cache stuff */
712 spinlock_t block_group_cache_lock
;
713 u64 first_logical_byte
;
714 struct rb_root block_group_cache_tree
;
716 /* keep track of unallocated space */
717 spinlock_t free_chunk_lock
;
718 u64 free_chunk_space
;
720 struct extent_io_tree freed_extents
[2];
721 struct extent_io_tree
*pinned_extents
;
723 /* logical->physical extent mapping */
724 struct btrfs_mapping_tree mapping_tree
;
727 * block reservation for extent, checksum, root tree and
728 * delayed dir index item
730 struct btrfs_block_rsv global_block_rsv
;
731 /* block reservation for delay allocation */
732 struct btrfs_block_rsv delalloc_block_rsv
;
733 /* block reservation for metadata operations */
734 struct btrfs_block_rsv trans_block_rsv
;
735 /* block reservation for chunk tree */
736 struct btrfs_block_rsv chunk_block_rsv
;
737 /* block reservation for delayed operations */
738 struct btrfs_block_rsv delayed_block_rsv
;
740 struct btrfs_block_rsv empty_block_rsv
;
743 u64 last_trans_committed
;
744 u64 avg_delayed_ref_runtime
;
747 * this is updated to the current trans every time a full commit
748 * is required instead of the faster short fsync log commits
750 u64 last_trans_log_full_commit
;
751 unsigned long mount_opt
;
753 * Track requests for actions that need to be done during transaction
754 * commit (like for some mount options).
756 unsigned long pending_changes
;
757 unsigned long compress_type
:4;
760 * It is a suggestive number, the read side is safe even it gets a
761 * wrong number because we will write out the data into a regular
762 * extent. The write side(mount/remount) is under ->s_umount lock,
763 * so it is also safe.
767 * Protected by ->chunk_mutex and sb->s_umount.
769 * The reason that we use two lock to protect it is because only
770 * remount and mount operations can change it and these two operations
771 * are under sb->s_umount, but the read side (chunk allocation) can not
772 * acquire sb->s_umount or the deadlock would happen. So we use two
773 * locks to protect it. On the write side, we must acquire two locks,
774 * and on the read side, we just need acquire one of them.
777 struct btrfs_transaction
*running_transaction
;
778 wait_queue_head_t transaction_throttle
;
779 wait_queue_head_t transaction_wait
;
780 wait_queue_head_t transaction_blocked_wait
;
781 wait_queue_head_t async_submit_wait
;
784 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
785 * when they are updated.
787 * Because we do not clear the flags for ever, so we needn't use
788 * the lock on the read side.
790 * We also needn't use the lock when we mount the fs, because
791 * there is no other task which will update the flag.
793 spinlock_t super_lock
;
794 struct btrfs_super_block
*super_copy
;
795 struct btrfs_super_block
*super_for_commit
;
796 struct block_device
*__bdev
;
797 struct super_block
*sb
;
798 struct inode
*btree_inode
;
799 struct backing_dev_info bdi
;
800 struct mutex tree_log_mutex
;
801 struct mutex transaction_kthread_mutex
;
802 struct mutex cleaner_mutex
;
803 struct mutex chunk_mutex
;
804 struct mutex volume_mutex
;
807 * this is taken to make sure we don't set block groups ro after
808 * the free space cache has been allocated on them
810 struct mutex ro_block_group_mutex
;
812 /* this is used during read/modify/write to make sure
813 * no two ios are trying to mod the same stripe at the same
816 struct btrfs_stripe_hash_table
*stripe_hash_table
;
819 * this protects the ordered operations list only while we are
820 * processing all of the entries on it. This way we make
821 * sure the commit code doesn't find the list temporarily empty
822 * because another function happens to be doing non-waiting preflush
823 * before jumping into the main commit.
825 struct mutex ordered_operations_mutex
;
827 struct rw_semaphore commit_root_sem
;
829 struct rw_semaphore cleanup_work_sem
;
831 struct rw_semaphore subvol_sem
;
832 struct srcu_struct subvol_srcu
;
834 spinlock_t trans_lock
;
836 * the reloc mutex goes with the trans lock, it is taken
837 * during commit to protect us from the relocation code
839 struct mutex reloc_mutex
;
841 struct list_head trans_list
;
842 struct list_head dead_roots
;
843 struct list_head caching_block_groups
;
845 spinlock_t delayed_iput_lock
;
846 struct list_head delayed_iputs
;
847 struct mutex cleaner_delayed_iput_mutex
;
849 /* this protects tree_mod_seq_list */
850 spinlock_t tree_mod_seq_lock
;
851 atomic64_t tree_mod_seq
;
852 struct list_head tree_mod_seq_list
;
854 /* this protects tree_mod_log */
855 rwlock_t tree_mod_log_lock
;
856 struct rb_root tree_mod_log
;
858 atomic_t nr_async_submits
;
859 atomic_t async_submit_draining
;
860 atomic_t nr_async_bios
;
861 atomic_t async_delalloc_pages
;
862 atomic_t open_ioctl_trans
;
865 * this is used to protect the following list -- ordered_roots.
867 spinlock_t ordered_root_lock
;
870 * all fs/file tree roots in which there are data=ordered extents
871 * pending writeback are added into this list.
873 * these can span multiple transactions and basically include
874 * every dirty data page that isn't from nodatacow
876 struct list_head ordered_roots
;
878 struct mutex delalloc_root_mutex
;
879 spinlock_t delalloc_root_lock
;
880 /* all fs/file tree roots that have delalloc inodes. */
881 struct list_head delalloc_roots
;
884 * there is a pool of worker threads for checksumming during writes
885 * and a pool for checksumming after reads. This is because readers
886 * can run with FS locks held, and the writers may be waiting for
887 * those locks. We don't want ordering in the pending list to cause
888 * deadlocks, and so the two are serviced separately.
890 * A third pool does submit_bio to avoid deadlocking with the other
893 struct btrfs_workqueue
*workers
;
894 struct btrfs_workqueue
*delalloc_workers
;
895 struct btrfs_workqueue
*flush_workers
;
896 struct btrfs_workqueue
*endio_workers
;
897 struct btrfs_workqueue
*endio_meta_workers
;
898 struct btrfs_workqueue
*endio_raid56_workers
;
899 struct btrfs_workqueue
*endio_repair_workers
;
900 struct btrfs_workqueue
*rmw_workers
;
901 struct btrfs_workqueue
*endio_meta_write_workers
;
902 struct btrfs_workqueue
*endio_write_workers
;
903 struct btrfs_workqueue
*endio_freespace_worker
;
904 struct btrfs_workqueue
*submit_workers
;
905 struct btrfs_workqueue
*caching_workers
;
906 struct btrfs_workqueue
*readahead_workers
;
909 * fixup workers take dirty pages that didn't properly go through
910 * the cow mechanism and make them safe to write. It happens
911 * for the sys_munmap function call path
913 struct btrfs_workqueue
*fixup_workers
;
914 struct btrfs_workqueue
*delayed_workers
;
916 /* the extent workers do delayed refs on the extent allocation tree */
917 struct btrfs_workqueue
*extent_workers
;
918 struct task_struct
*transaction_kthread
;
919 struct task_struct
*cleaner_kthread
;
920 int thread_pool_size
;
922 struct kobject
*space_info_kobj
;
925 int log_root_recovering
;
930 /* used to keep from writing metadata until there is a nice batch */
931 struct percpu_counter dirty_metadata_bytes
;
932 struct percpu_counter delalloc_bytes
;
933 s32 dirty_metadata_batch
;
936 struct list_head dirty_cowonly_roots
;
938 struct btrfs_fs_devices
*fs_devices
;
941 * the space_info list is almost entirely read only. It only changes
942 * when we add a new raid type to the FS, and that happens
943 * very rarely. RCU is used to protect it.
945 struct list_head space_info
;
947 struct btrfs_space_info
*data_sinfo
;
949 struct reloc_control
*reloc_ctl
;
951 /* data_alloc_cluster is only used in ssd mode */
952 struct btrfs_free_cluster data_alloc_cluster
;
954 /* all metadata allocations go through this cluster */
955 struct btrfs_free_cluster meta_alloc_cluster
;
957 /* auto defrag inodes go here */
958 spinlock_t defrag_inodes_lock
;
959 struct rb_root defrag_inodes
;
960 atomic_t defrag_running
;
962 /* Used to protect avail_{data, metadata, system}_alloc_bits */
963 seqlock_t profiles_lock
;
965 * these three are in extended format (availability of single
966 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
967 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
969 u64 avail_data_alloc_bits
;
970 u64 avail_metadata_alloc_bits
;
971 u64 avail_system_alloc_bits
;
973 /* restriper state */
974 spinlock_t balance_lock
;
975 struct mutex balance_mutex
;
976 atomic_t balance_running
;
977 atomic_t balance_pause_req
;
978 atomic_t balance_cancel_req
;
979 struct btrfs_balance_control
*balance_ctl
;
980 wait_queue_head_t balance_wait_q
;
982 unsigned data_chunk_allocations
;
983 unsigned metadata_ratio
;
987 /* private scrub information */
988 struct mutex scrub_lock
;
989 atomic_t scrubs_running
;
990 atomic_t scrub_pause_req
;
991 atomic_t scrubs_paused
;
992 atomic_t scrub_cancel_req
;
993 wait_queue_head_t scrub_pause_wait
;
994 int scrub_workers_refcnt
;
995 struct btrfs_workqueue
*scrub_workers
;
996 struct btrfs_workqueue
*scrub_wr_completion_workers
;
997 struct btrfs_workqueue
*scrub_nocow_workers
;
998 struct btrfs_workqueue
*scrub_parity_workers
;
1000 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1001 u32 check_integrity_print_mask
;
1006 unsigned int quota_enabled
:1;
1009 * quota_enabled only changes state after a commit. This holds the
1012 unsigned int pending_quota_state
:1;
1014 /* is qgroup tracking in a consistent state? */
1017 /* holds configuration and tracking. Protected by qgroup_lock */
1018 struct rb_root qgroup_tree
;
1019 struct rb_root qgroup_op_tree
;
1020 spinlock_t qgroup_lock
;
1021 spinlock_t qgroup_op_lock
;
1022 atomic_t qgroup_op_seq
;
1025 * used to avoid frequently calling ulist_alloc()/ulist_free()
1026 * when doing qgroup accounting, it must be protected by qgroup_lock.
1028 struct ulist
*qgroup_ulist
;
1030 /* protect user change for quota operations */
1031 struct mutex qgroup_ioctl_lock
;
1033 /* list of dirty qgroups to be written at next commit */
1034 struct list_head dirty_qgroups
;
1036 /* used by qgroup for an efficient tree traversal */
1039 /* qgroup rescan items */
1040 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1041 struct btrfs_key qgroup_rescan_progress
;
1042 struct btrfs_workqueue
*qgroup_rescan_workers
;
1043 struct completion qgroup_rescan_completion
;
1044 struct btrfs_work qgroup_rescan_work
;
1046 /* filesystem state */
1047 unsigned long fs_state
;
1049 struct btrfs_delayed_root
*delayed_root
;
1051 /* readahead tree */
1052 spinlock_t reada_lock
;
1053 struct radix_tree_root reada_tree
;
1055 /* readahead works cnt */
1056 atomic_t reada_works_cnt
;
1058 /* Extent buffer radix tree */
1059 spinlock_t buffer_lock
;
1060 struct radix_tree_root buffer_radix
;
1062 /* next backup root to be overwritten */
1063 int backup_root_index
;
1065 int num_tolerated_disk_barrier_failures
;
1067 /* device replace state */
1068 struct btrfs_dev_replace dev_replace
;
1070 atomic_t mutually_exclusive_operation_running
;
1072 struct percpu_counter bio_counter
;
1073 wait_queue_head_t replace_wait
;
1075 struct semaphore uuid_tree_rescan_sem
;
1076 unsigned int update_uuid_tree_gen
:1;
1078 /* Used to reclaim the metadata space in the background. */
1079 struct work_struct async_reclaim_work
;
1081 spinlock_t unused_bgs_lock
;
1082 struct list_head unused_bgs
;
1083 struct mutex unused_bg_unpin_mutex
;
1084 struct mutex delete_unused_bgs_mutex
;
1086 /* For btrfs to record security options */
1087 struct security_mnt_opts security_opts
;
1090 * Chunks that can't be freed yet (under a trim/discard operation)
1091 * and will be latter freed. Protected by fs_info->chunk_mutex.
1093 struct list_head pinned_chunks
;
1095 int creating_free_space_tree
;
1098 struct btrfs_subvolume_writers
{
1099 struct percpu_counter counter
;
1100 wait_queue_head_t wait
;
1104 * The state of btrfs root
1107 * btrfs_record_root_in_trans is a multi-step process,
1108 * and it can race with the balancing code. But the
1109 * race is very small, and only the first time the root
1110 * is added to each transaction. So IN_TRANS_SETUP
1111 * is used to tell us when more checks are required
1113 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1114 #define BTRFS_ROOT_REF_COWS 1
1115 #define BTRFS_ROOT_TRACK_DIRTY 2
1116 #define BTRFS_ROOT_IN_RADIX 3
1117 #define BTRFS_ROOT_DUMMY_ROOT 4
1118 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
1119 #define BTRFS_ROOT_DEFRAG_RUNNING 6
1120 #define BTRFS_ROOT_FORCE_COW 7
1121 #define BTRFS_ROOT_MULTI_LOG_TASKS 8
1122 #define BTRFS_ROOT_DIRTY 9
1125 * in ram representation of the tree. extent_root is used for all allocations
1126 * and for the extent tree extent_root root.
1129 struct extent_buffer
*node
;
1131 struct extent_buffer
*commit_root
;
1132 struct btrfs_root
*log_root
;
1133 struct btrfs_root
*reloc_root
;
1135 unsigned long state
;
1136 struct btrfs_root_item root_item
;
1137 struct btrfs_key root_key
;
1138 struct btrfs_fs_info
*fs_info
;
1139 struct extent_io_tree dirty_log_pages
;
1141 struct mutex objectid_mutex
;
1143 spinlock_t accounting_lock
;
1144 struct btrfs_block_rsv
*block_rsv
;
1146 /* free ino cache stuff */
1147 struct btrfs_free_space_ctl
*free_ino_ctl
;
1148 enum btrfs_caching_type ino_cache_state
;
1149 spinlock_t ino_cache_lock
;
1150 wait_queue_head_t ino_cache_wait
;
1151 struct btrfs_free_space_ctl
*free_ino_pinned
;
1152 u64 ino_cache_progress
;
1153 struct inode
*ino_cache_inode
;
1155 struct mutex log_mutex
;
1156 wait_queue_head_t log_writer_wait
;
1157 wait_queue_head_t log_commit_wait
[2];
1158 struct list_head log_ctxs
[2];
1159 atomic_t log_writers
;
1160 atomic_t log_commit
[2];
1163 /* No matter the commit succeeds or not*/
1164 int log_transid_committed
;
1165 /* Just be updated when the commit succeeds. */
1166 int last_log_commit
;
1167 pid_t log_start_pid
;
1172 /* data allocations are done in sectorsize units */
1175 /* node allocations are done in nodesize units */
1182 u64 highest_objectid
;
1184 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1187 u64 defrag_trans_start
;
1188 struct btrfs_key defrag_progress
;
1189 struct btrfs_key defrag_max
;
1192 /* the dirty list is only used by non-reference counted roots */
1193 struct list_head dirty_list
;
1195 struct list_head root_list
;
1197 spinlock_t log_extents_lock
[2];
1198 struct list_head logged_list
[2];
1200 spinlock_t orphan_lock
;
1201 atomic_t orphan_inodes
;
1202 struct btrfs_block_rsv
*orphan_block_rsv
;
1203 int orphan_cleanup_state
;
1205 spinlock_t inode_lock
;
1206 /* red-black tree that keeps track of in-memory inodes */
1207 struct rb_root inode_tree
;
1210 * radix tree that keeps track of delayed nodes of every inode,
1211 * protected by inode_lock
1213 struct radix_tree_root delayed_nodes_tree
;
1215 * right now this just gets used so that a root has its own devid
1216 * for stat. It may be used for more later
1220 spinlock_t root_item_lock
;
1223 struct mutex delalloc_mutex
;
1224 spinlock_t delalloc_lock
;
1226 * all of the inodes that have delalloc bytes. It is possible for
1227 * this list to be empty even when there is still dirty data=ordered
1228 * extents waiting to finish IO.
1230 struct list_head delalloc_inodes
;
1231 struct list_head delalloc_root
;
1232 u64 nr_delalloc_inodes
;
1234 struct mutex ordered_extent_mutex
;
1236 * this is used by the balancing code to wait for all the pending
1239 spinlock_t ordered_extent_lock
;
1242 * all of the data=ordered extents pending writeback
1243 * these can span multiple transactions and basically include
1244 * every dirty data page that isn't from nodatacow
1246 struct list_head ordered_extents
;
1247 struct list_head ordered_root
;
1248 u64 nr_ordered_extents
;
1251 * Number of currently running SEND ioctls to prevent
1252 * manipulation with the read-only status via SUBVOL_SETFLAGS
1254 int send_in_progress
;
1255 struct btrfs_subvolume_writers
*subv_writers
;
1256 atomic_t will_be_snapshoted
;
1258 /* For qgroup metadata space reserve */
1259 atomic_t qgroup_meta_rsv
;
1263 * Flags for mount options.
1265 * Note: don't forget to add new options to btrfs_show_options()
1267 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1268 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1269 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1270 #define BTRFS_MOUNT_SSD (1 << 3)
1271 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1272 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1273 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1274 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1275 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1276 #define BTRFS_MOUNT_NOSSD (1 << 9)
1277 #define BTRFS_MOUNT_DISCARD (1 << 10)
1278 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1279 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1280 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1281 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1282 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1283 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1284 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1285 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1286 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1287 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1288 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1289 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1290 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1291 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1292 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1293 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1294 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1296 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1297 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1299 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1300 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1301 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1302 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1305 #define btrfs_set_and_info(root, opt, fmt, args...) \
1307 if (!btrfs_test_opt(root, opt)) \
1308 btrfs_info(root->fs_info, fmt, ##args); \
1309 btrfs_set_opt(root->fs_info->mount_opt, opt); \
1312 #define btrfs_clear_and_info(root, opt, fmt, args...) \
1314 if (btrfs_test_opt(root, opt)) \
1315 btrfs_info(root->fs_info, fmt, ##args); \
1316 btrfs_clear_opt(root->fs_info->mount_opt, opt); \
1319 #ifdef CONFIG_BTRFS_DEBUG
1321 btrfs_should_fragment_free_space(struct btrfs_root
*root
,
1322 struct btrfs_block_group_cache
*block_group
)
1324 return (btrfs_test_opt(root
, FRAGMENT_METADATA
) &&
1325 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1326 (btrfs_test_opt(root
, FRAGMENT_DATA
) &&
1327 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1332 * Requests for changes that need to be done during transaction commit.
1334 * Internal mount options that are used for special handling of the real
1335 * mount options (eg. cannot be set during remount and have to be set during
1336 * transaction commit)
1339 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1340 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1341 #define BTRFS_PENDING_COMMIT (2)
1343 #define btrfs_test_pending(info, opt) \
1344 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1345 #define btrfs_set_pending(info, opt) \
1346 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1347 #define btrfs_clear_pending(info, opt) \
1348 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1351 * Helpers for setting pending mount option changes.
1353 * Expects corresponding macros
1354 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1356 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1358 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1359 btrfs_info((info), fmt, ##args); \
1360 btrfs_set_pending((info), SET_##opt); \
1361 btrfs_clear_pending((info), CLEAR_##opt); \
1365 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1367 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1368 btrfs_info((info), fmt, ##args); \
1369 btrfs_set_pending((info), CLEAR_##opt); \
1370 btrfs_clear_pending((info), SET_##opt); \
1377 #define BTRFS_INODE_NODATASUM (1 << 0)
1378 #define BTRFS_INODE_NODATACOW (1 << 1)
1379 #define BTRFS_INODE_READONLY (1 << 2)
1380 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1381 #define BTRFS_INODE_PREALLOC (1 << 4)
1382 #define BTRFS_INODE_SYNC (1 << 5)
1383 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1384 #define BTRFS_INODE_APPEND (1 << 7)
1385 #define BTRFS_INODE_NODUMP (1 << 8)
1386 #define BTRFS_INODE_NOATIME (1 << 9)
1387 #define BTRFS_INODE_DIRSYNC (1 << 10)
1388 #define BTRFS_INODE_COMPRESS (1 << 11)
1390 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1392 struct btrfs_map_token
{
1393 struct extent_buffer
*eb
;
1395 unsigned long offset
;
1398 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1399 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1401 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1403 token
->kaddr
= NULL
;
1406 /* some macros to generate set/get functions for the struct fields. This
1407 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1410 #define le8_to_cpu(v) (v)
1411 #define cpu_to_le8(v) (v)
1414 #define read_eb_member(eb, ptr, type, member, result) ( \
1415 read_extent_buffer(eb, (char *)(result), \
1416 ((unsigned long)(ptr)) + \
1417 offsetof(type, member), \
1418 sizeof(((type *)0)->member)))
1420 #define write_eb_member(eb, ptr, type, member, result) ( \
1421 write_extent_buffer(eb, (char *)(result), \
1422 ((unsigned long)(ptr)) + \
1423 offsetof(type, member), \
1424 sizeof(((type *)0)->member)))
1426 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1427 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1428 unsigned long off, \
1429 struct btrfs_map_token *token); \
1430 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1431 unsigned long off, u##bits val, \
1432 struct btrfs_map_token *token); \
1433 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1434 unsigned long off) \
1436 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1438 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1439 unsigned long off, u##bits val) \
1441 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1444 DECLARE_BTRFS_SETGET_BITS(8)
1445 DECLARE_BTRFS_SETGET_BITS(16)
1446 DECLARE_BTRFS_SETGET_BITS(32)
1447 DECLARE_BTRFS_SETGET_BITS(64)
1449 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1450 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1452 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1453 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1455 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1458 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1459 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1461 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1462 struct btrfs_map_token *token) \
1464 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1465 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1467 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1468 type *s, u##bits val, \
1469 struct btrfs_map_token *token) \
1471 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1472 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1475 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1476 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1478 type *p = page_address(eb->pages[0]); \
1479 u##bits res = le##bits##_to_cpu(p->member); \
1482 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1485 type *p = page_address(eb->pages[0]); \
1486 p->member = cpu_to_le##bits(val); \
1489 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1490 static inline u##bits btrfs_##name(type *s) \
1492 return le##bits##_to_cpu(s->member); \
1494 static inline void btrfs_set_##name(type *s, u##bits val) \
1496 s->member = cpu_to_le##bits(val); \
1499 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1500 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1501 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1502 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1503 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1504 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1506 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1507 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1508 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1509 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1510 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1511 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1513 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1514 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1516 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1518 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1520 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1522 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1524 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1525 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1527 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1529 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1531 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1534 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1536 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1539 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1541 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1544 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1545 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1546 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1547 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1548 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1549 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1550 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1551 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1552 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1553 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1554 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1556 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1558 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1561 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1562 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1563 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1565 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1567 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1569 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1571 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1572 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1574 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1576 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1577 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1579 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1582 unsigned long offset
= (unsigned long)c
;
1583 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1584 offset
+= nr
* sizeof(struct btrfs_stripe
);
1585 return (struct btrfs_stripe
*)offset
;
1588 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1590 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1593 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1594 struct btrfs_chunk
*c
, int nr
)
1596 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1599 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1600 struct btrfs_chunk
*c
, int nr
)
1602 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1605 /* struct btrfs_block_group_item */
1606 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1608 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1610 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1611 struct btrfs_block_group_item
, chunk_objectid
, 64);
1613 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1614 struct btrfs_block_group_item
, chunk_objectid
, 64);
1615 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1616 struct btrfs_block_group_item
, flags
, 64);
1617 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1618 struct btrfs_block_group_item
, flags
, 64);
1620 /* struct btrfs_free_space_info */
1621 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1623 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1625 /* struct btrfs_inode_ref */
1626 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1627 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1629 /* struct btrfs_inode_extref */
1630 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1631 parent_objectid
, 64);
1632 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1634 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1636 /* struct btrfs_inode_item */
1637 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1638 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1639 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1640 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1641 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1642 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1643 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1644 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1645 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1646 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1647 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1648 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1649 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1651 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1653 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1655 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1656 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1658 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1660 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1661 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1662 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1663 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1664 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1665 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1666 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1667 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1668 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1669 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1671 /* struct btrfs_dev_extent */
1672 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1674 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1675 chunk_objectid
, 64);
1676 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1678 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1680 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1682 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1683 return (unsigned long)dev
+ ptr
;
1686 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1687 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1689 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1691 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1694 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1696 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1697 struct btrfs_tree_block_info
*item
,
1698 struct btrfs_disk_key
*key
)
1700 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1703 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1704 struct btrfs_tree_block_info
*item
,
1705 struct btrfs_disk_key
*key
)
1707 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1710 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1712 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1714 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1716 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1719 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1722 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1724 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1727 static inline u32
btrfs_extent_inline_ref_size(int type
)
1729 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1730 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1731 return sizeof(struct btrfs_extent_inline_ref
);
1732 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1733 return sizeof(struct btrfs_shared_data_ref
) +
1734 sizeof(struct btrfs_extent_inline_ref
);
1735 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1736 return sizeof(struct btrfs_extent_data_ref
) +
1737 offsetof(struct btrfs_extent_inline_ref
, offset
);
1742 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1743 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1745 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1746 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1748 /* struct btrfs_node */
1749 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1750 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1751 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1753 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1756 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1759 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1760 sizeof(struct btrfs_key_ptr
) * nr
;
1761 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1764 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1768 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1769 sizeof(struct btrfs_key_ptr
) * nr
;
1770 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1773 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1776 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1777 sizeof(struct btrfs_key_ptr
) * nr
;
1778 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1781 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1785 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1786 sizeof(struct btrfs_key_ptr
) * nr
;
1787 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1790 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1792 return offsetof(struct btrfs_node
, ptrs
) +
1793 sizeof(struct btrfs_key_ptr
) * nr
;
1796 void btrfs_node_key(struct extent_buffer
*eb
,
1797 struct btrfs_disk_key
*disk_key
, int nr
);
1799 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1800 struct btrfs_disk_key
*disk_key
, int nr
)
1803 ptr
= btrfs_node_key_ptr_offset(nr
);
1804 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1805 struct btrfs_key_ptr
, key
, disk_key
);
1808 /* struct btrfs_item */
1809 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1810 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1811 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1812 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1814 static inline unsigned long btrfs_item_nr_offset(int nr
)
1816 return offsetof(struct btrfs_leaf
, items
) +
1817 sizeof(struct btrfs_item
) * nr
;
1820 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1822 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1825 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1826 struct btrfs_item
*item
)
1828 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1831 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1833 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1836 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1838 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1841 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1843 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1846 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1847 struct btrfs_disk_key
*disk_key
, int nr
)
1849 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1850 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1853 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1854 struct btrfs_disk_key
*disk_key
, int nr
)
1856 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1857 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1860 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1863 * struct btrfs_root_ref
1865 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1866 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1867 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1869 /* struct btrfs_dir_item */
1870 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1871 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1872 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1873 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1874 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1875 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1877 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1879 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1882 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1883 struct btrfs_dir_item
*item
,
1884 struct btrfs_disk_key
*key
)
1886 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1889 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1890 struct btrfs_dir_item
*item
,
1891 struct btrfs_disk_key
*key
)
1893 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1896 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1898 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1900 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1903 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1904 struct btrfs_free_space_header
*h
,
1905 struct btrfs_disk_key
*key
)
1907 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1910 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1911 struct btrfs_free_space_header
*h
,
1912 struct btrfs_disk_key
*key
)
1914 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1917 /* struct btrfs_disk_key */
1918 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1920 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1921 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1923 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1924 struct btrfs_disk_key
*disk
)
1926 cpu
->offset
= le64_to_cpu(disk
->offset
);
1927 cpu
->type
= disk
->type
;
1928 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1931 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1932 struct btrfs_key
*cpu
)
1934 disk
->offset
= cpu_to_le64(cpu
->offset
);
1935 disk
->type
= cpu
->type
;
1936 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1939 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1940 struct btrfs_key
*key
, int nr
)
1942 struct btrfs_disk_key disk_key
;
1943 btrfs_node_key(eb
, &disk_key
, nr
);
1944 btrfs_disk_key_to_cpu(key
, &disk_key
);
1947 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1948 struct btrfs_key
*key
, int nr
)
1950 struct btrfs_disk_key disk_key
;
1951 btrfs_item_key(eb
, &disk_key
, nr
);
1952 btrfs_disk_key_to_cpu(key
, &disk_key
);
1955 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1956 struct btrfs_dir_item
*item
,
1957 struct btrfs_key
*key
)
1959 struct btrfs_disk_key disk_key
;
1960 btrfs_dir_item_key(eb
, item
, &disk_key
);
1961 btrfs_disk_key_to_cpu(key
, &disk_key
);
1965 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1970 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1975 /* struct btrfs_header */
1976 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1977 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1979 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1980 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1981 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1982 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1983 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
1985 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
1986 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
1988 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
1990 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1992 return (btrfs_header_flags(eb
) & flag
) == flag
;
1995 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1997 u64 flags
= btrfs_header_flags(eb
);
1998 btrfs_set_header_flags(eb
, flags
| flag
);
1999 return (flags
& flag
) == flag
;
2002 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2004 u64 flags
= btrfs_header_flags(eb
);
2005 btrfs_set_header_flags(eb
, flags
& ~flag
);
2006 return (flags
& flag
) == flag
;
2009 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2011 u64 flags
= btrfs_header_flags(eb
);
2012 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2015 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2018 u64 flags
= btrfs_header_flags(eb
);
2019 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2020 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2021 btrfs_set_header_flags(eb
, flags
);
2024 static inline unsigned long btrfs_header_fsid(void)
2026 return offsetof(struct btrfs_header
, fsid
);
2029 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2031 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2034 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2036 return btrfs_header_level(eb
) == 0;
2039 /* struct btrfs_root_item */
2040 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2042 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2043 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2044 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2046 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2048 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2049 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2050 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2051 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2052 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2053 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2054 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2055 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2057 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2059 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2061 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2063 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2065 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2068 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2070 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2073 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2075 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2078 /* struct btrfs_root_backup */
2079 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2081 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2083 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2084 tree_root_level
, 8);
2086 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2088 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2089 chunk_root_gen
, 64);
2090 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2091 chunk_root_level
, 8);
2093 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2095 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2096 extent_root_gen
, 64);
2097 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2098 extent_root_level
, 8);
2100 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2102 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2104 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2107 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2109 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2111 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2114 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2116 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2118 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2119 csum_root_level
, 8);
2120 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2122 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2124 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2127 /* struct btrfs_balance_item */
2128 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2130 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2131 struct btrfs_balance_item
*bi
,
2132 struct btrfs_disk_balance_args
*ba
)
2134 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2137 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2138 struct btrfs_balance_item
*bi
,
2139 struct btrfs_disk_balance_args
*ba
)
2141 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2144 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2145 struct btrfs_balance_item
*bi
,
2146 struct btrfs_disk_balance_args
*ba
)
2148 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2151 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2152 struct btrfs_balance_item
*bi
,
2153 struct btrfs_disk_balance_args
*ba
)
2155 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2158 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2159 struct btrfs_balance_item
*bi
,
2160 struct btrfs_disk_balance_args
*ba
)
2162 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2165 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2166 struct btrfs_balance_item
*bi
,
2167 struct btrfs_disk_balance_args
*ba
)
2169 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2173 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2174 struct btrfs_disk_balance_args
*disk
)
2176 memset(cpu
, 0, sizeof(*cpu
));
2178 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2179 cpu
->usage
= le64_to_cpu(disk
->usage
);
2180 cpu
->devid
= le64_to_cpu(disk
->devid
);
2181 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2182 cpu
->pend
= le64_to_cpu(disk
->pend
);
2183 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2184 cpu
->vend
= le64_to_cpu(disk
->vend
);
2185 cpu
->target
= le64_to_cpu(disk
->target
);
2186 cpu
->flags
= le64_to_cpu(disk
->flags
);
2187 cpu
->limit
= le64_to_cpu(disk
->limit
);
2191 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2192 struct btrfs_balance_args
*cpu
)
2194 memset(disk
, 0, sizeof(*disk
));
2196 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2197 disk
->usage
= cpu_to_le64(cpu
->usage
);
2198 disk
->devid
= cpu_to_le64(cpu
->devid
);
2199 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2200 disk
->pend
= cpu_to_le64(cpu
->pend
);
2201 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2202 disk
->vend
= cpu_to_le64(cpu
->vend
);
2203 disk
->target
= cpu_to_le64(cpu
->target
);
2204 disk
->flags
= cpu_to_le64(cpu
->flags
);
2205 disk
->limit
= cpu_to_le64(cpu
->limit
);
2208 /* struct btrfs_super_block */
2209 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2210 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2211 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2213 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2214 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2215 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2216 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2217 struct btrfs_super_block
, chunk_root_generation
, 64);
2218 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2220 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2222 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2223 chunk_root_level
, 8);
2224 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2226 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2227 log_root_transid
, 64);
2228 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2230 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2232 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2234 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2236 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2238 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2240 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2241 root_dir_objectid
, 64);
2242 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2244 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2246 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2247 compat_ro_flags
, 64);
2248 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2249 incompat_flags
, 64);
2250 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2252 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2253 cache_generation
, 64);
2254 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2255 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2256 uuid_tree_generation
, 64);
2258 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2260 u16 t
= btrfs_super_csum_type(s
);
2262 * csum type is validated at mount time
2264 return btrfs_csum_sizes
[t
];
2267 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2269 return offsetof(struct btrfs_leaf
, items
);
2272 /* struct btrfs_file_extent_item */
2273 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2274 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2275 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2276 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2277 struct btrfs_file_extent_item
, offset
, 64);
2278 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2279 struct btrfs_file_extent_item
, generation
, 64);
2280 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2281 struct btrfs_file_extent_item
, num_bytes
, 64);
2282 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2283 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2284 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2285 struct btrfs_file_extent_item
, compression
, 8);
2287 static inline unsigned long
2288 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2290 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2293 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2295 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2298 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2300 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2302 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2303 disk_num_bytes
, 64);
2304 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2306 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2308 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2310 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2312 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2314 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2315 other_encoding
, 16);
2318 * this returns the number of bytes used by the item on disk, minus the
2319 * size of any extent headers. If a file is compressed on disk, this is
2320 * the compressed size
2322 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2323 struct btrfs_item
*e
)
2325 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2328 /* this returns the number of file bytes represented by the inline item.
2329 * If an item is compressed, this is the uncompressed size
2331 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2333 struct btrfs_file_extent_item
*fi
)
2335 struct btrfs_map_token token
;
2337 btrfs_init_map_token(&token
);
2339 * return the space used on disk if this item isn't
2340 * compressed or encoded
2342 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
2343 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
2344 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
2345 return btrfs_file_extent_inline_item_len(eb
,
2346 btrfs_item_nr(slot
));
2349 /* otherwise use the ram bytes field */
2350 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
2354 /* btrfs_dev_stats_item */
2355 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2356 struct btrfs_dev_stats_item
*ptr
,
2361 read_extent_buffer(eb
, &val
,
2362 offsetof(struct btrfs_dev_stats_item
, values
) +
2363 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2368 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2369 struct btrfs_dev_stats_item
*ptr
,
2372 write_extent_buffer(eb
, &val
,
2373 offsetof(struct btrfs_dev_stats_item
, values
) +
2374 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2378 /* btrfs_qgroup_status_item */
2379 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2381 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2383 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2385 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2388 /* btrfs_qgroup_info_item */
2389 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2391 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2392 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2394 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2395 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2398 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2399 struct btrfs_qgroup_info_item
, generation
, 64);
2400 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2402 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2403 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2404 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2406 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2407 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2409 /* btrfs_qgroup_limit_item */
2410 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2412 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2414 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2416 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2418 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2421 /* btrfs_dev_replace_item */
2422 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2423 struct btrfs_dev_replace_item
, src_devid
, 64);
2424 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2425 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2427 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2429 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2431 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2433 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2434 num_write_errors
, 64);
2435 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2436 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2438 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2440 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2443 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2444 struct btrfs_dev_replace_item
, src_devid
, 64);
2445 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2446 struct btrfs_dev_replace_item
,
2447 cont_reading_from_srcdev_mode
, 64);
2448 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2449 struct btrfs_dev_replace_item
, replace_state
, 64);
2450 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2451 struct btrfs_dev_replace_item
, time_started
, 64);
2452 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2453 struct btrfs_dev_replace_item
, time_stopped
, 64);
2454 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2455 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2457 struct btrfs_dev_replace_item
,
2458 num_uncorrectable_read_errors
, 64);
2459 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2460 struct btrfs_dev_replace_item
, cursor_left
, 64);
2461 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2462 struct btrfs_dev_replace_item
, cursor_right
, 64);
2464 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2466 return sb
->s_fs_info
;
2469 /* helper function to cast into the data area of the leaf. */
2470 #define btrfs_item_ptr(leaf, slot, type) \
2471 ((type *)(btrfs_leaf_data(leaf) + \
2472 btrfs_item_offset_nr(leaf, slot)))
2474 #define btrfs_item_ptr_offset(leaf, slot) \
2475 ((unsigned long)(btrfs_leaf_data(leaf) + \
2476 btrfs_item_offset_nr(leaf, slot)))
2478 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2480 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2481 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2484 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2486 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2491 u64
btrfs_csum_bytes_to_leaves(struct btrfs_root
*root
, u64 csum_bytes
);
2493 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2496 return root
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2500 * Doing a truncate won't result in new nodes or leaves, just what we need for
2503 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2506 return root
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2509 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
2510 struct btrfs_root
*root
);
2511 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
2512 struct btrfs_root
*root
);
2513 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2515 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2516 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2517 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2518 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2519 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2520 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2521 struct btrfs_root
*root
, unsigned long count
);
2522 int btrfs_async_run_delayed_refs(struct btrfs_root
*root
,
2523 unsigned long count
, u64 transid
, int wait
);
2524 int btrfs_lookup_data_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2525 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2526 struct btrfs_root
*root
, u64 bytenr
,
2527 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2528 int btrfs_pin_extent(struct btrfs_root
*root
,
2529 u64 bytenr
, u64 num
, int reserved
);
2530 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
2531 u64 bytenr
, u64 num_bytes
);
2532 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
2533 struct extent_buffer
*eb
);
2534 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2535 struct btrfs_root
*root
,
2536 u64 objectid
, u64 offset
, u64 bytenr
);
2537 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2538 struct btrfs_fs_info
*info
,
2540 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2541 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2542 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
2543 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2544 struct btrfs_root
*root
, u64 parent
,
2546 struct btrfs_disk_key
*key
, int level
,
2547 u64 hint
, u64 empty_size
);
2548 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2549 struct btrfs_root
*root
,
2550 struct extent_buffer
*buf
,
2551 u64 parent
, int last_ref
);
2552 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2553 struct btrfs_root
*root
,
2554 u64 root_objectid
, u64 owner
,
2555 u64 offset
, u64 ram_bytes
,
2556 struct btrfs_key
*ins
);
2557 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2558 struct btrfs_root
*root
,
2559 u64 root_objectid
, u64 owner
, u64 offset
,
2560 struct btrfs_key
*ins
);
2561 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 num_bytes
,
2562 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2563 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2564 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2565 struct extent_buffer
*buf
, int full_backref
);
2566 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2567 struct extent_buffer
*buf
, int full_backref
);
2568 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2569 struct btrfs_root
*root
,
2570 u64 bytenr
, u64 num_bytes
, u64 flags
,
2571 int level
, int is_data
);
2572 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2573 struct btrfs_root
*root
,
2574 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2575 u64 owner
, u64 offset
);
2577 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
,
2579 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2580 u64 start
, u64 len
);
2581 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2582 struct btrfs_root
*root
);
2583 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2584 struct btrfs_root
*root
);
2585 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2586 struct btrfs_root
*root
,
2587 u64 bytenr
, u64 num_bytes
, u64 parent
,
2588 u64 root_objectid
, u64 owner
, u64 offset
);
2590 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2591 struct btrfs_root
*root
);
2592 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2593 struct btrfs_root
*root
);
2594 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2595 struct btrfs_root
*root
);
2596 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2597 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2598 int btrfs_read_block_groups(struct btrfs_root
*root
);
2599 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2600 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2601 struct btrfs_root
*root
, u64 bytes_used
,
2602 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2604 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2605 struct btrfs_fs_info
*fs_info
,
2606 const u64 chunk_offset
);
2607 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2608 struct btrfs_root
*root
, u64 group_start
,
2609 struct extent_map
*em
);
2610 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2611 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2612 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2613 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
2614 struct btrfs_root
*root
);
2615 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2616 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2618 enum btrfs_reserve_flush_enum
{
2619 /* If we are in the transaction, we can't flush anything.*/
2620 BTRFS_RESERVE_NO_FLUSH
,
2622 * Flushing delalloc may cause deadlock somewhere, in this
2623 * case, use FLUSH LIMIT
2625 BTRFS_RESERVE_FLUSH_LIMIT
,
2626 BTRFS_RESERVE_FLUSH_ALL
,
2629 enum btrfs_flush_state
{
2630 FLUSH_DELAYED_ITEMS_NR
= 1,
2631 FLUSH_DELAYED_ITEMS
= 2,
2633 FLUSH_DELALLOC_WAIT
= 4,
2638 int btrfs_check_data_free_space(struct inode
*inode
, u64 start
, u64 len
);
2639 int btrfs_alloc_data_chunk_ondemand(struct inode
*inode
, u64 bytes
);
2640 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 start
, u64 len
);
2641 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2643 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2644 struct btrfs_root
*root
);
2645 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2646 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2647 struct inode
*inode
);
2648 void btrfs_orphan_release_metadata(struct inode
*inode
);
2649 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2650 struct btrfs_block_rsv
*rsv
,
2652 u64
*qgroup_reserved
, bool use_global_rsv
);
2653 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
2654 struct btrfs_block_rsv
*rsv
,
2655 u64 qgroup_reserved
);
2656 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2657 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2658 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 start
, u64 len
);
2659 void btrfs_delalloc_release_space(struct inode
*inode
, u64 start
, u64 len
);
2660 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2661 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
2662 unsigned short type
);
2663 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2664 struct btrfs_block_rsv
*rsv
);
2665 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
2666 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2667 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2668 enum btrfs_reserve_flush_enum flush
);
2669 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2670 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2671 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2672 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2673 enum btrfs_reserve_flush_enum flush
);
2674 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2675 struct btrfs_block_rsv
*dst_rsv
, u64 num_bytes
,
2677 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2678 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2680 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2681 struct btrfs_block_rsv
*block_rsv
,
2683 int btrfs_inc_block_group_ro(struct btrfs_root
*root
,
2684 struct btrfs_block_group_cache
*cache
);
2685 void btrfs_dec_block_group_ro(struct btrfs_root
*root
,
2686 struct btrfs_block_group_cache
*cache
);
2687 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2688 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2689 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2690 u64 start
, u64 end
);
2691 int btrfs_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2692 u64 num_bytes
, u64
*actual_bytes
);
2693 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2694 struct btrfs_root
*root
, u64 type
);
2695 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2697 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2698 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2699 struct btrfs_fs_info
*fs_info
);
2700 int __get_raid_index(u64 flags
);
2701 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
2702 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
2703 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2704 void check_system_chunk(struct btrfs_trans_handle
*trans
,
2705 struct btrfs_root
*root
,
2707 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2708 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2711 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2712 int level
, int *slot
);
2713 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2714 int btrfs_previous_item(struct btrfs_root
*root
,
2715 struct btrfs_path
*path
, u64 min_objectid
,
2717 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2718 struct btrfs_path
*path
, u64 min_objectid
);
2719 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2720 struct btrfs_path
*path
,
2721 struct btrfs_key
*new_key
);
2722 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2723 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2724 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2725 struct btrfs_key
*key
, int lowest_level
,
2727 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2728 struct btrfs_path
*path
,
2730 enum btrfs_compare_tree_result
{
2731 BTRFS_COMPARE_TREE_NEW
,
2732 BTRFS_COMPARE_TREE_DELETED
,
2733 BTRFS_COMPARE_TREE_CHANGED
,
2734 BTRFS_COMPARE_TREE_SAME
,
2736 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2737 struct btrfs_root
*right_root
,
2738 struct btrfs_path
*left_path
,
2739 struct btrfs_path
*right_path
,
2740 struct btrfs_key
*key
,
2741 enum btrfs_compare_tree_result result
,
2743 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2744 struct btrfs_root
*right_root
,
2745 btrfs_changed_cb_t cb
, void *ctx
);
2746 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2747 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2748 struct extent_buffer
*parent
, int parent_slot
,
2749 struct extent_buffer
**cow_ret
);
2750 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2751 struct btrfs_root
*root
,
2752 struct extent_buffer
*buf
,
2753 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2754 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2755 struct extent_buffer
*buf
);
2756 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2758 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2759 u32 new_size
, int from_end
);
2760 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2761 struct btrfs_root
*root
,
2762 struct btrfs_path
*path
,
2763 struct btrfs_key
*new_key
,
2764 unsigned long split_offset
);
2765 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2766 struct btrfs_root
*root
,
2767 struct btrfs_path
*path
,
2768 struct btrfs_key
*new_key
);
2769 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2770 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2771 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2772 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2774 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
2775 struct btrfs_path
*p
, u64 time_seq
);
2776 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2777 struct btrfs_key
*key
, struct btrfs_path
*p
,
2778 int find_higher
, int return_any
);
2779 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2780 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2781 int start_slot
, u64
*last_ret
,
2782 struct btrfs_key
*progress
);
2783 void btrfs_release_path(struct btrfs_path
*p
);
2784 struct btrfs_path
*btrfs_alloc_path(void);
2785 void btrfs_free_path(struct btrfs_path
*p
);
2786 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2787 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2788 struct extent_buffer
*held
, int held_rw
);
2789 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2791 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2792 struct btrfs_path
*path
, int slot
, int nr
);
2793 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2794 struct btrfs_root
*root
,
2795 struct btrfs_path
*path
)
2797 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2800 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2801 struct btrfs_key
*cpu_key
, u32
*data_size
,
2802 u32 total_data
, u32 total_size
, int nr
);
2803 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2804 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2805 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2806 struct btrfs_root
*root
,
2807 struct btrfs_path
*path
,
2808 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2810 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2811 struct btrfs_root
*root
,
2812 struct btrfs_path
*path
,
2813 struct btrfs_key
*key
,
2816 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2819 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2820 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2821 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2823 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2824 struct btrfs_path
*p
, u64 time_seq
)
2827 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2828 return btrfs_next_old_leaf(root
, p
, time_seq
);
2831 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2833 return btrfs_next_old_item(root
, p
, 0);
2835 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2836 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2837 struct btrfs_block_rsv
*block_rsv
,
2838 int update_ref
, int for_reloc
);
2839 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2840 struct btrfs_root
*root
,
2841 struct extent_buffer
*node
,
2842 struct extent_buffer
*parent
);
2843 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2846 * Get synced with close_ctree()
2849 return fs_info
->closing
;
2853 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2854 * anything except sleeping. This function is used to check the status of
2857 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
2859 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
2860 btrfs_fs_closing(root
->fs_info
));
2863 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2865 kfree(fs_info
->balance_ctl
);
2866 kfree(fs_info
->delayed_root
);
2867 kfree(fs_info
->extent_root
);
2868 kfree(fs_info
->tree_root
);
2869 kfree(fs_info
->chunk_root
);
2870 kfree(fs_info
->dev_root
);
2871 kfree(fs_info
->csum_root
);
2872 kfree(fs_info
->quota_root
);
2873 kfree(fs_info
->uuid_root
);
2874 kfree(fs_info
->free_space_root
);
2875 kfree(fs_info
->super_copy
);
2876 kfree(fs_info
->super_for_commit
);
2877 security_free_mnt_opts(&fs_info
->security_opts
);
2881 /* tree mod log functions from ctree.c */
2882 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2883 struct seq_list
*elem
);
2884 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2885 struct seq_list
*elem
);
2886 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2889 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
2890 struct btrfs_path
*path
,
2891 u64 root_id
, u64 ref_id
);
2892 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2893 struct btrfs_root
*tree_root
,
2894 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2895 const char *name
, int name_len
);
2896 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2897 struct btrfs_root
*tree_root
,
2898 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2899 const char *name
, int name_len
);
2900 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2901 struct btrfs_key
*key
);
2902 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2903 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2905 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2906 struct btrfs_root
*root
,
2907 struct btrfs_key
*key
,
2908 struct btrfs_root_item
*item
);
2909 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
2910 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
2911 struct btrfs_key
*root_key
);
2912 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2913 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2914 struct extent_buffer
*node
);
2915 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2916 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
2917 struct btrfs_root
*root
);
2920 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
2921 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2923 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
2924 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2926 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
2927 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
2931 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
2932 const char *name
, int name_len
);
2933 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2934 struct btrfs_root
*root
, const char *name
,
2935 int name_len
, struct inode
*dir
,
2936 struct btrfs_key
*location
, u8 type
, u64 index
);
2937 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2938 struct btrfs_root
*root
,
2939 struct btrfs_path
*path
, u64 dir
,
2940 const char *name
, int name_len
,
2942 struct btrfs_dir_item
*
2943 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2944 struct btrfs_root
*root
,
2945 struct btrfs_path
*path
, u64 dir
,
2946 u64 objectid
, const char *name
, int name_len
,
2948 struct btrfs_dir_item
*
2949 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2950 struct btrfs_path
*path
, u64 dirid
,
2951 const char *name
, int name_len
);
2952 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2953 struct btrfs_root
*root
,
2954 struct btrfs_path
*path
,
2955 struct btrfs_dir_item
*di
);
2956 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2957 struct btrfs_root
*root
,
2958 struct btrfs_path
*path
, u64 objectid
,
2959 const char *name
, u16 name_len
,
2960 const void *data
, u16 data_len
);
2961 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2962 struct btrfs_root
*root
,
2963 struct btrfs_path
*path
, u64 dir
,
2964 const char *name
, u16 name_len
,
2966 int verify_dir_item(struct btrfs_root
*root
,
2967 struct extent_buffer
*leaf
,
2968 struct btrfs_dir_item
*dir_item
);
2969 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2970 struct btrfs_path
*path
,
2975 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2976 struct btrfs_root
*root
, u64 offset
);
2977 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2978 struct btrfs_root
*root
, u64 offset
);
2979 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2982 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2983 struct btrfs_root
*root
,
2984 const char *name
, int name_len
,
2985 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2986 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2987 struct btrfs_root
*root
,
2988 const char *name
, int name_len
,
2989 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2990 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2991 struct btrfs_root
*root
,
2992 struct btrfs_path
*path
, u64 objectid
);
2993 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2994 *root
, struct btrfs_path
*path
,
2995 struct btrfs_key
*location
, int mod
);
2997 struct btrfs_inode_extref
*
2998 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
2999 struct btrfs_root
*root
,
3000 struct btrfs_path
*path
,
3001 const char *name
, int name_len
,
3002 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3005 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3006 u64 ref_objectid
, const char *name
,
3008 struct btrfs_inode_extref
**extref_ret
);
3011 struct btrfs_dio_private
;
3012 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3013 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3014 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3015 struct bio
*bio
, u32
*dst
);
3016 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3017 struct bio
*bio
, u64 logical_offset
);
3018 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3019 struct btrfs_root
*root
,
3020 u64 objectid
, u64 pos
,
3021 u64 disk_offset
, u64 disk_num_bytes
,
3022 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3023 u8 compression
, u8 encryption
, u16 other_encoding
);
3024 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3025 struct btrfs_root
*root
,
3026 struct btrfs_path
*path
, u64 objectid
,
3027 u64 bytenr
, int mod
);
3028 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3029 struct btrfs_root
*root
,
3030 struct btrfs_ordered_sum
*sums
);
3031 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3032 struct bio
*bio
, u64 file_start
, int contig
);
3033 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3034 struct list_head
*list
, int search_commit
);
3035 void btrfs_extent_item_to_extent_map(struct inode
*inode
,
3036 const struct btrfs_path
*path
,
3037 struct btrfs_file_extent_item
*fi
,
3038 const bool new_inline
,
3039 struct extent_map
*em
);
3042 struct btrfs_delalloc_work
{
3043 struct inode
*inode
;
3045 struct completion completion
;
3046 struct list_head list
;
3047 struct btrfs_work work
;
3050 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3052 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3054 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3055 size_t pg_offset
, u64 start
, u64 len
,
3057 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3058 u64
*orig_start
, u64
*orig_block_len
,
3061 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3062 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3063 #define ClearPageChecked ClearPageFsMisc
3064 #define SetPageChecked SetPageFsMisc
3065 #define PageChecked PageFsMisc
3068 /* This forces readahead on a given range of bytes in an inode */
3069 static inline void btrfs_force_ra(struct address_space
*mapping
,
3070 struct file_ra_state
*ra
, struct file
*file
,
3071 pgoff_t offset
, unsigned long req_size
)
3073 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3076 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3077 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3078 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3079 struct btrfs_root
*root
,
3080 struct inode
*dir
, struct inode
*inode
,
3081 const char *name
, int name_len
);
3082 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3083 struct inode
*parent_inode
, struct inode
*inode
,
3084 const char *name
, int name_len
, int add_backref
, u64 index
);
3085 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3086 struct btrfs_root
*root
,
3087 struct inode
*dir
, u64 objectid
,
3088 const char *name
, int name_len
);
3089 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3091 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3092 struct btrfs_root
*root
,
3093 struct inode
*inode
, u64 new_size
,
3096 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3097 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3099 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3100 struct extent_state
**cached_state
);
3101 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3102 struct btrfs_root
*new_root
,
3103 struct btrfs_root
*parent_root
,
3105 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3106 size_t size
, struct bio
*bio
,
3107 unsigned long bio_flags
);
3108 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3109 int btrfs_readpage(struct file
*file
, struct page
*page
);
3110 void btrfs_evict_inode(struct inode
*inode
);
3111 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3112 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3113 void btrfs_destroy_inode(struct inode
*inode
);
3114 int btrfs_drop_inode(struct inode
*inode
);
3115 int btrfs_init_cachep(void);
3116 void btrfs_destroy_cachep(void);
3117 long btrfs_ioctl_trans_end(struct file
*file
);
3118 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3119 struct btrfs_root
*root
, int *was_new
);
3120 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3121 size_t pg_offset
, u64 start
, u64 end
,
3123 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3124 struct btrfs_root
*root
,
3125 struct inode
*inode
);
3126 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3127 struct btrfs_root
*root
, struct inode
*inode
);
3128 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3129 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3130 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3131 struct btrfs_root
*root
);
3132 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3133 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3134 void btrfs_add_delayed_iput(struct inode
*inode
);
3135 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3136 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3137 u64 start
, u64 num_bytes
, u64 min_size
,
3138 loff_t actual_len
, u64
*alloc_hint
);
3139 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3140 struct btrfs_trans_handle
*trans
, int mode
,
3141 u64 start
, u64 num_bytes
, u64 min_size
,
3142 loff_t actual_len
, u64
*alloc_hint
);
3143 int btrfs_inode_check_errors(struct inode
*inode
);
3144 extern const struct dentry_operations btrfs_dentry_operations
;
3145 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3146 void btrfs_test_inode_set_ops(struct inode
*inode
);
3150 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3151 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3152 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3153 void btrfs_update_iflags(struct inode
*inode
);
3154 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3155 int btrfs_is_empty_uuid(u8
*uuid
);
3156 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3157 struct btrfs_ioctl_defrag_range_args
*range
,
3158 u64 newer_than
, unsigned long max_pages
);
3159 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3160 struct btrfs_ioctl_space_info
*space
);
3161 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3162 struct btrfs_ioctl_balance_args
*bargs
);
3163 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
3164 struct file
*dst_file
, u64 dst_loff
);
3167 int btrfs_auto_defrag_init(void);
3168 void btrfs_auto_defrag_exit(void);
3169 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3170 struct inode
*inode
);
3171 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3172 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3173 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3174 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3176 extern const struct file_operations btrfs_file_operations
;
3177 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3178 struct btrfs_root
*root
, struct inode
*inode
,
3179 struct btrfs_path
*path
, u64 start
, u64 end
,
3180 u64
*drop_end
, int drop_cache
,
3182 u32 extent_item_size
,
3184 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3185 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3186 u64 end
, int drop_cache
);
3187 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3188 struct inode
*inode
, u64 start
, u64 end
);
3189 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3190 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3191 struct page
**pages
, size_t num_pages
,
3192 loff_t pos
, size_t write_bytes
,
3193 struct extent_state
**cached
);
3194 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3195 ssize_t
btrfs_copy_file_range(struct file
*file_in
, loff_t pos_in
,
3196 struct file
*file_out
, loff_t pos_out
,
3197 size_t len
, unsigned int flags
);
3198 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
3199 struct file
*file_out
, loff_t pos_out
, u64 len
);
3202 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3203 struct btrfs_root
*root
);
3206 int btrfs_init_sysfs(void);
3207 void btrfs_exit_sysfs(void);
3208 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3209 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3212 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3215 int btrfs_parse_options(struct btrfs_root
*root
, char *options
,
3216 unsigned long new_flags
);
3217 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3219 #ifdef CONFIG_PRINTK
3221 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3223 static inline __printf(2, 3)
3224 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3229 #define btrfs_emerg(fs_info, fmt, args...) \
3230 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3231 #define btrfs_alert(fs_info, fmt, args...) \
3232 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3233 #define btrfs_crit(fs_info, fmt, args...) \
3234 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3235 #define btrfs_err(fs_info, fmt, args...) \
3236 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3237 #define btrfs_warn(fs_info, fmt, args...) \
3238 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3239 #define btrfs_notice(fs_info, fmt, args...) \
3240 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3241 #define btrfs_info(fs_info, fmt, args...) \
3242 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3245 * Wrappers that use printk_in_rcu
3247 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3248 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3249 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3250 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3251 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3252 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3253 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3254 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3255 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3256 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3257 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3258 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3259 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3260 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3263 * Wrappers that use a ratelimited printk_in_rcu
3265 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3266 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3267 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3268 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3269 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3270 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3271 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3272 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3273 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3274 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3275 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3276 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3277 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3278 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3281 * Wrappers that use a ratelimited printk
3283 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3284 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3285 #define btrfs_alert_rl(fs_info, fmt, args...) \
3286 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3287 #define btrfs_crit_rl(fs_info, fmt, args...) \
3288 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3289 #define btrfs_err_rl(fs_info, fmt, args...) \
3290 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3291 #define btrfs_warn_rl(fs_info, fmt, args...) \
3292 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3293 #define btrfs_notice_rl(fs_info, fmt, args...) \
3294 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3295 #define btrfs_info_rl(fs_info, fmt, args...) \
3296 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3298 #define btrfs_debug(fs_info, fmt, args...) \
3299 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3300 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3301 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3302 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3303 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3304 #define btrfs_debug_rl(fs_info, fmt, args...) \
3305 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3307 #define btrfs_debug(fs_info, fmt, args...) \
3308 no_printk(KERN_DEBUG fmt, ##args)
3309 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3310 no_printk(KERN_DEBUG fmt, ##args)
3311 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3312 no_printk(KERN_DEBUG fmt, ##args)
3313 #define btrfs_debug_rl(fs_info, fmt, args...) \
3314 no_printk(KERN_DEBUG fmt, ##args)
3317 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3320 btrfs_printk(fs_info, fmt, ##args); \
3321 rcu_read_unlock(); \
3324 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3326 static DEFINE_RATELIMIT_STATE(_rs, \
3327 DEFAULT_RATELIMIT_INTERVAL, \
3328 DEFAULT_RATELIMIT_BURST); \
3329 if (__ratelimit(&_rs)) \
3330 btrfs_printk(fs_info, fmt, ##args); \
3333 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3336 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3337 rcu_read_unlock(); \
3340 #ifdef CONFIG_BTRFS_ASSERT
3343 static inline void assfail(char *expr
, char *file
, int line
)
3345 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3350 #define ASSERT(expr) \
3351 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3353 #define ASSERT(expr) ((void)0)
3358 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3359 unsigned int line
, int errno
, const char *fmt
, ...);
3361 const char *btrfs_decode_error(int errno
);
3364 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3365 struct btrfs_root
*root
, const char *function
,
3366 unsigned int line
, int errno
);
3369 * Call btrfs_abort_transaction as early as possible when an error condition is
3370 * detected, that way the exact line number is reported.
3372 #define btrfs_abort_transaction(trans, root, errno) \
3374 /* Report first abort since mount */ \
3375 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3376 &((root)->fs_info->fs_state))) { \
3377 WARN(1, KERN_DEBUG \
3378 "BTRFS: Transaction aborted (error %d)\n", \
3381 __btrfs_abort_transaction((trans), (root), __func__, \
3382 __LINE__, (errno)); \
3385 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3387 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3388 (errno), fmt, ##args); \
3393 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3394 unsigned int line
, int errno
, const char *fmt
, ...);
3396 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3397 * will panic(). Otherwise we BUG() here.
3399 #define btrfs_panic(fs_info, errno, fmt, args...) \
3401 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3406 /* compatibility and incompatibility defines */
3408 #define btrfs_set_fs_incompat(__fs_info, opt) \
3409 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3411 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3414 struct btrfs_super_block
*disk_super
;
3417 disk_super
= fs_info
->super_copy
;
3418 features
= btrfs_super_incompat_flags(disk_super
);
3419 if (!(features
& flag
)) {
3420 spin_lock(&fs_info
->super_lock
);
3421 features
= btrfs_super_incompat_flags(disk_super
);
3422 if (!(features
& flag
)) {
3424 btrfs_set_super_incompat_flags(disk_super
, features
);
3425 btrfs_info(fs_info
, "setting %llu feature flag",
3428 spin_unlock(&fs_info
->super_lock
);
3432 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3433 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3435 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3438 struct btrfs_super_block
*disk_super
;
3441 disk_super
= fs_info
->super_copy
;
3442 features
= btrfs_super_incompat_flags(disk_super
);
3443 if (features
& flag
) {
3444 spin_lock(&fs_info
->super_lock
);
3445 features
= btrfs_super_incompat_flags(disk_super
);
3446 if (features
& flag
) {
3448 btrfs_set_super_incompat_flags(disk_super
, features
);
3449 btrfs_info(fs_info
, "clearing %llu feature flag",
3452 spin_unlock(&fs_info
->super_lock
);
3456 #define btrfs_fs_incompat(fs_info, opt) \
3457 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3459 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3461 struct btrfs_super_block
*disk_super
;
3462 disk_super
= fs_info
->super_copy
;
3463 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3466 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3467 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3469 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3472 struct btrfs_super_block
*disk_super
;
3475 disk_super
= fs_info
->super_copy
;
3476 features
= btrfs_super_compat_ro_flags(disk_super
);
3477 if (!(features
& flag
)) {
3478 spin_lock(&fs_info
->super_lock
);
3479 features
= btrfs_super_compat_ro_flags(disk_super
);
3480 if (!(features
& flag
)) {
3482 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3483 btrfs_info(fs_info
, "setting %llu ro feature flag",
3486 spin_unlock(&fs_info
->super_lock
);
3490 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3491 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3493 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3496 struct btrfs_super_block
*disk_super
;
3499 disk_super
= fs_info
->super_copy
;
3500 features
= btrfs_super_compat_ro_flags(disk_super
);
3501 if (features
& flag
) {
3502 spin_lock(&fs_info
->super_lock
);
3503 features
= btrfs_super_compat_ro_flags(disk_super
);
3504 if (features
& flag
) {
3506 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3507 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3510 spin_unlock(&fs_info
->super_lock
);
3514 #define btrfs_fs_compat_ro(fs_info, opt) \
3515 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3517 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3519 struct btrfs_super_block
*disk_super
;
3520 disk_super
= fs_info
->super_copy
;
3521 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3525 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3526 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3527 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3528 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3529 struct inode
*inode
, struct inode
*dir
);
3531 #define btrfs_get_acl NULL
3532 #define btrfs_set_acl NULL
3533 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3534 struct inode
*inode
, struct inode
*dir
)
3541 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3542 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3543 struct btrfs_root
*root
);
3544 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3545 struct btrfs_root
*root
);
3546 int btrfs_recover_relocation(struct btrfs_root
*root
);
3547 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3548 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3549 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3550 struct extent_buffer
*cow
);
3551 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3552 u64
*bytes_to_reserve
);
3553 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3554 struct btrfs_pending_snapshot
*pending
);
3557 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3558 u64 end
, struct btrfs_scrub_progress
*progress
,
3559 int readonly
, int is_dev_replace
);
3560 void btrfs_scrub_pause(struct btrfs_root
*root
);
3561 void btrfs_scrub_continue(struct btrfs_root
*root
);
3562 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3563 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3564 struct btrfs_device
*dev
);
3565 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3566 struct btrfs_scrub_progress
*progress
);
3569 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3570 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3571 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3573 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3575 btrfs_bio_counter_sub(fs_info
, 1);
3579 struct reada_control
{
3580 struct btrfs_root
*root
; /* tree to prefetch */
3581 struct btrfs_key key_start
;
3582 struct btrfs_key key_end
; /* exclusive */
3585 wait_queue_head_t wait
;
3587 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3588 struct btrfs_key
*start
, struct btrfs_key
*end
);
3589 int btrfs_reada_wait(void *handle
);
3590 void btrfs_reada_detach(void *handle
);
3591 int btree_readahead_hook(struct btrfs_fs_info
*fs_info
,
3592 struct extent_buffer
*eb
, u64 start
, int err
);
3594 static inline int is_fstree(u64 rootid
)
3596 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3597 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3598 !btrfs_qgroup_level(rootid
)))
3603 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3605 return signal_pending(current
);
3608 /* Sanity test specific functions */
3609 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3610 void btrfs_test_destroy_inode(struct inode
*inode
);
3613 static inline int btrfs_test_is_dummy_root(struct btrfs_root
*root
)
3615 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3616 if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT
, &root
->state
)))