2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/sched/signal.h>
24 #include <linux/highmem.h>
26 #include <linux/rwsem.h>
27 #include <linux/semaphore.h>
28 #include <linux/completion.h>
29 #include <linux/backing-dev.h>
30 #include <linux/wait.h>
31 #include <linux/slab.h>
32 #include <linux/kobject.h>
33 #include <trace/events/btrfs.h>
34 #include <asm/kmap_types.h>
35 #include <linux/pagemap.h>
36 #include <linux/btrfs.h>
37 #include <linux/btrfs_tree.h>
38 #include <linux/workqueue.h>
39 #include <linux/security.h>
40 #include <linux/sizes.h>
41 #include <linux/dynamic_debug.h>
42 #include <linux/refcount.h>
43 #include "extent_io.h"
44 #include "extent_map.h"
45 #include "async-thread.h"
47 struct btrfs_trans_handle
;
48 struct btrfs_transaction
;
49 struct btrfs_pending_snapshot
;
50 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
51 extern struct kmem_cache
*btrfs_transaction_cachep
;
52 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
53 extern struct kmem_cache
*btrfs_path_cachep
;
54 extern struct kmem_cache
*btrfs_free_space_cachep
;
55 struct btrfs_ordered_sum
;
57 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
58 #define STATIC noinline
60 #define STATIC static noinline
63 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
65 #define BTRFS_MAX_MIRRORS 3
67 #define BTRFS_MAX_LEVEL 8
69 #define BTRFS_COMPAT_EXTENT_TREE_V0
72 * the max metadata block size. This limit is somewhat artificial,
73 * but the memmove costs go through the roof for larger blocks.
75 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
78 * we can actually store much bigger names, but lets not confuse the rest
81 #define BTRFS_NAME_LEN 255
84 * Theoretical limit is larger, but we keep this down to a sane
85 * value. That should limit greatly the possibility of collisions on
88 #define BTRFS_LINK_MAX 65535U
90 static const int btrfs_csum_sizes
[] = { 4 };
92 /* four bytes for CRC32 */
93 #define BTRFS_EMPTY_DIR_SIZE 0
95 /* ioprio of readahead is set to idle */
96 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
98 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
100 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
103 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
105 static inline u32
count_max_extents(u64 size
)
107 return div_u64(size
+ BTRFS_MAX_EXTENT_SIZE
- 1, BTRFS_MAX_EXTENT_SIZE
);
110 struct btrfs_mapping_tree
{
111 struct extent_map_tree map_tree
;
114 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
116 BUG_ON(num_stripes
== 0);
117 return sizeof(struct btrfs_chunk
) +
118 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
124 #define BTRFS_FS_STATE_ERROR 0
125 #define BTRFS_FS_STATE_REMOUNTING 1
126 #define BTRFS_FS_STATE_TRANS_ABORTED 2
127 #define BTRFS_FS_STATE_DEV_REPLACING 3
128 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
130 #define BTRFS_BACKREF_REV_MAX 256
131 #define BTRFS_BACKREF_REV_SHIFT 56
132 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
133 BTRFS_BACKREF_REV_SHIFT)
135 #define BTRFS_OLD_BACKREF_REV 0
136 #define BTRFS_MIXED_BACKREF_REV 1
139 * every tree block (leaf or node) starts with this header.
141 struct btrfs_header
{
142 /* these first four must match the super block */
143 u8 csum
[BTRFS_CSUM_SIZE
];
144 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
145 __le64 bytenr
; /* which block this node is supposed to live in */
148 /* allowed to be different from the super from here on down */
149 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
154 } __attribute__ ((__packed__
));
157 * this is a very generous portion of the super block, giving us
158 * room to translate 14 chunks with 3 stripes each.
160 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
163 * just in case we somehow lose the roots and are not able to mount,
164 * we store an array of the roots from previous transactions
167 #define BTRFS_NUM_BACKUP_ROOTS 4
168 struct btrfs_root_backup
{
170 __le64 tree_root_gen
;
173 __le64 chunk_root_gen
;
176 __le64 extent_root_gen
;
185 __le64 csum_root_gen
;
195 u8 extent_root_level
;
199 /* future and to align */
201 } __attribute__ ((__packed__
));
204 * the super block basically lists the main trees of the FS
205 * it currently lacks any block count etc etc
207 struct btrfs_super_block
{
208 u8 csum
[BTRFS_CSUM_SIZE
];
209 /* the first 4 fields must match struct btrfs_header */
210 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
211 __le64 bytenr
; /* this block number */
214 /* allowed to be different from the btrfs_header from here own down */
221 /* this will help find the new super based on the log root */
222 __le64 log_root_transid
;
225 __le64 root_dir_objectid
;
229 __le32 __unused_leafsize
;
231 __le32 sys_chunk_array_size
;
232 __le64 chunk_root_generation
;
234 __le64 compat_ro_flags
;
235 __le64 incompat_flags
;
240 struct btrfs_dev_item dev_item
;
242 char label
[BTRFS_LABEL_SIZE
];
244 __le64 cache_generation
;
245 __le64 uuid_tree_generation
;
247 /* future expansion */
249 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
250 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
251 } __attribute__ ((__packed__
));
254 * Compat flags that we support. If any incompat flags are set other than the
255 * ones specified below then we will fail to mount
257 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
258 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
259 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
261 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
262 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
263 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
265 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
266 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
268 #define BTRFS_FEATURE_INCOMPAT_SUPP \
269 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
270 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
271 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
272 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
273 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
274 BTRFS_FEATURE_INCOMPAT_RAID56 | \
275 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
276 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
277 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
279 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
280 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
281 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
284 * A leaf is full of items. offset and size tell us where to find
285 * the item in the leaf (relative to the start of the data area)
288 struct btrfs_disk_key key
;
291 } __attribute__ ((__packed__
));
294 * leaves have an item area and a data area:
295 * [item0, item1....itemN] [free space] [dataN...data1, data0]
297 * The data is separate from the items to get the keys closer together
301 struct btrfs_header header
;
302 struct btrfs_item items
[];
303 } __attribute__ ((__packed__
));
306 * all non-leaf blocks are nodes, they hold only keys and pointers to
309 struct btrfs_key_ptr
{
310 struct btrfs_disk_key key
;
313 } __attribute__ ((__packed__
));
316 struct btrfs_header header
;
317 struct btrfs_key_ptr ptrs
[];
318 } __attribute__ ((__packed__
));
321 * btrfs_paths remember the path taken from the root down to the leaf.
322 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
323 * to any other levels that are present.
325 * The slots array records the index of the item or block pointer
326 * used while walking the tree.
328 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
330 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
331 int slots
[BTRFS_MAX_LEVEL
];
332 /* if there is real range locking, this locks field will change */
333 u8 locks
[BTRFS_MAX_LEVEL
];
335 /* keep some upper locks as we walk down */
339 * set by btrfs_split_item, tells search_slot to keep all locks
340 * and to force calls to keep space in the nodes
342 unsigned int search_for_split
:1;
343 unsigned int keep_locks
:1;
344 unsigned int skip_locking
:1;
345 unsigned int leave_spinning
:1;
346 unsigned int search_commit_root
:1;
347 unsigned int need_commit_sem
:1;
348 unsigned int skip_release_on_error
:1;
350 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
351 sizeof(struct btrfs_item))
352 struct btrfs_dev_replace
{
353 u64 replace_state
; /* see #define above */
354 u64 time_started
; /* seconds since 1-Jan-1970 */
355 u64 time_stopped
; /* seconds since 1-Jan-1970 */
356 atomic64_t num_write_errors
;
357 atomic64_t num_uncorrectable_read_errors
;
360 u64 committed_cursor_left
;
361 u64 cursor_left_last_write_of_item
;
364 u64 cont_reading_from_srcdev_mode
; /* see #define above */
367 int item_needs_writeback
;
368 struct btrfs_device
*srcdev
;
369 struct btrfs_device
*tgtdev
;
372 atomic_t nesting_level
;
373 struct mutex lock_finishing_cancel_unmount
;
376 atomic_t blocking_readers
;
377 wait_queue_head_t read_lock_wq
;
379 struct btrfs_scrub_progress scrub_progress
;
382 /* For raid type sysfs entries */
383 struct raid_kobject
{
388 struct btrfs_space_info
{
391 u64 total_bytes
; /* total bytes in the space,
392 this doesn't take mirrors into account */
393 u64 bytes_used
; /* total bytes used,
394 this doesn't take mirrors into account */
395 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
396 transaction finishes */
397 u64 bytes_reserved
; /* total bytes the allocator has reserved for
398 current allocations */
399 u64 bytes_may_use
; /* number of bytes that may be used for
400 delalloc/allocations */
401 u64 bytes_readonly
; /* total bytes that are read only */
403 u64 max_extent_size
; /* This will hold the maximum extent size of
404 the space info if we had an ENOSPC in the
407 unsigned int full
:1; /* indicates that we cannot allocate any more
408 chunks for this space */
409 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
411 unsigned int flush
:1; /* set if we are trying to make space */
413 unsigned int force_alloc
; /* set if we need to force a chunk
414 alloc for this space */
416 u64 disk_used
; /* total bytes used on disk */
417 u64 disk_total
; /* total bytes on disk, takes mirrors into
423 * bytes_pinned is kept in line with what is actually pinned, as in
424 * we've called update_block_group and dropped the bytes_used counter
425 * and increased the bytes_pinned counter. However this means that
426 * bytes_pinned does not reflect the bytes that will be pinned once the
427 * delayed refs are flushed, so this counter is inc'ed every time we
428 * call btrfs_free_extent so it is a realtime count of what will be
429 * freed once the transaction is committed. It will be zeroed every
430 * time the transaction commits.
432 struct percpu_counter total_bytes_pinned
;
434 struct list_head list
;
435 /* Protected by the spinlock 'lock'. */
436 struct list_head ro_bgs
;
437 struct list_head priority_tickets
;
438 struct list_head tickets
;
440 * tickets_id just indicates the next ticket will be handled, so note
441 * it's not stored per ticket.
445 struct rw_semaphore groups_sem
;
446 /* for block groups in our same type */
447 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
448 wait_queue_head_t wait
;
451 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
454 #define BTRFS_BLOCK_RSV_GLOBAL 1
455 #define BTRFS_BLOCK_RSV_DELALLOC 2
456 #define BTRFS_BLOCK_RSV_TRANS 3
457 #define BTRFS_BLOCK_RSV_CHUNK 4
458 #define BTRFS_BLOCK_RSV_DELOPS 5
459 #define BTRFS_BLOCK_RSV_EMPTY 6
460 #define BTRFS_BLOCK_RSV_TEMP 7
462 struct btrfs_block_rsv
{
465 struct btrfs_space_info
*space_info
;
469 unsigned short failfast
;
473 * free clusters are used to claim free space in relatively large chunks,
474 * allowing us to do less seeky writes. They are used for all metadata
475 * allocations and data allocations in ssd mode.
477 struct btrfs_free_cluster
{
479 spinlock_t refill_lock
;
482 /* largest extent in this cluster */
485 /* first extent starting offset */
488 /* We did a full search and couldn't create a cluster */
491 struct btrfs_block_group_cache
*block_group
;
493 * when a cluster is allocated from a block group, we put the
494 * cluster onto a list in the block group so that it can
495 * be freed before the block group is freed.
497 struct list_head block_group_list
;
500 enum btrfs_caching_type
{
502 BTRFS_CACHE_STARTED
= 1,
503 BTRFS_CACHE_FAST
= 2,
504 BTRFS_CACHE_FINISHED
= 3,
505 BTRFS_CACHE_ERROR
= 4,
508 enum btrfs_disk_cache_state
{
509 BTRFS_DC_WRITTEN
= 0,
515 struct btrfs_caching_control
{
516 struct list_head list
;
518 wait_queue_head_t wait
;
519 struct btrfs_work work
;
520 struct btrfs_block_group_cache
*block_group
;
525 /* Once caching_thread() finds this much free space, it will wake up waiters. */
526 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
528 struct btrfs_io_ctl
{
532 struct btrfs_fs_info
*fs_info
;
539 unsigned check_crcs
:1;
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 #define SEQ_LAST ((u64)-1)
664 enum btrfs_orphan_cleanup_state
{
665 ORPHAN_CLEANUP_STARTED
= 1,
666 ORPHAN_CLEANUP_DONE
= 2,
669 /* used by the raid56 code to lock stripes for read/modify/write */
670 struct btrfs_stripe_hash
{
671 struct list_head hash_list
;
672 wait_queue_head_t wait
;
676 /* used by the raid56 code to lock stripes for read/modify/write */
677 struct btrfs_stripe_hash_table
{
678 struct list_head stripe_cache
;
679 spinlock_t cache_lock
;
681 struct btrfs_stripe_hash table
[];
684 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
686 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
689 struct reloc_control
;
691 struct btrfs_fs_devices
;
692 struct btrfs_balance_control
;
693 struct btrfs_delayed_root
;
695 #define BTRFS_FS_BARRIER 1
696 #define BTRFS_FS_CLOSING_START 2
697 #define BTRFS_FS_CLOSING_DONE 3
698 #define BTRFS_FS_LOG_RECOVERING 4
699 #define BTRFS_FS_OPEN 5
700 #define BTRFS_FS_QUOTA_ENABLED 6
701 #define BTRFS_FS_QUOTA_ENABLING 7
702 #define BTRFS_FS_QUOTA_DISABLING 8
703 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
704 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
705 #define BTRFS_FS_BTREE_ERR 11
706 #define BTRFS_FS_LOG1_ERR 12
707 #define BTRFS_FS_LOG2_ERR 13
709 * Indicate that a whole-filesystem exclusive operation is running
710 * (device replace, resize, device add/delete, balance)
712 #define BTRFS_FS_EXCL_OP 14
714 struct btrfs_fs_info
{
715 u8 fsid
[BTRFS_FSID_SIZE
];
716 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
718 struct btrfs_root
*extent_root
;
719 struct btrfs_root
*tree_root
;
720 struct btrfs_root
*chunk_root
;
721 struct btrfs_root
*dev_root
;
722 struct btrfs_root
*fs_root
;
723 struct btrfs_root
*csum_root
;
724 struct btrfs_root
*quota_root
;
725 struct btrfs_root
*uuid_root
;
726 struct btrfs_root
*free_space_root
;
728 /* the log root tree is a directory of all the other log roots */
729 struct btrfs_root
*log_root_tree
;
731 spinlock_t fs_roots_radix_lock
;
732 struct radix_tree_root fs_roots_radix
;
734 /* block group cache stuff */
735 spinlock_t block_group_cache_lock
;
736 u64 first_logical_byte
;
737 struct rb_root block_group_cache_tree
;
739 /* keep track of unallocated space */
740 spinlock_t free_chunk_lock
;
741 u64 free_chunk_space
;
743 struct extent_io_tree freed_extents
[2];
744 struct extent_io_tree
*pinned_extents
;
746 /* logical->physical extent mapping */
747 struct btrfs_mapping_tree mapping_tree
;
750 * block reservation for extent, checksum, root tree and
751 * delayed dir index item
753 struct btrfs_block_rsv global_block_rsv
;
754 /* block reservation for delay allocation */
755 struct btrfs_block_rsv delalloc_block_rsv
;
756 /* block reservation for metadata operations */
757 struct btrfs_block_rsv trans_block_rsv
;
758 /* block reservation for chunk tree */
759 struct btrfs_block_rsv chunk_block_rsv
;
760 /* block reservation for delayed operations */
761 struct btrfs_block_rsv delayed_block_rsv
;
763 struct btrfs_block_rsv empty_block_rsv
;
766 u64 last_trans_committed
;
767 u64 avg_delayed_ref_runtime
;
770 * this is updated to the current trans every time a full commit
771 * is required instead of the faster short fsync log commits
773 u64 last_trans_log_full_commit
;
774 unsigned long mount_opt
;
776 * Track requests for actions that need to be done during transaction
777 * commit (like for some mount options).
779 unsigned long pending_changes
;
780 unsigned long compress_type
:4;
783 * It is a suggestive number, the read side is safe even it gets a
784 * wrong number because we will write out the data into a regular
785 * extent. The write side(mount/remount) is under ->s_umount lock,
786 * so it is also safe.
790 * Protected by ->chunk_mutex and sb->s_umount.
792 * The reason that we use two lock to protect it is because only
793 * remount and mount operations can change it and these two operations
794 * are under sb->s_umount, but the read side (chunk allocation) can not
795 * acquire sb->s_umount or the deadlock would happen. So we use two
796 * locks to protect it. On the write side, we must acquire two locks,
797 * and on the read side, we just need acquire one of them.
800 struct btrfs_transaction
*running_transaction
;
801 wait_queue_head_t transaction_throttle
;
802 wait_queue_head_t transaction_wait
;
803 wait_queue_head_t transaction_blocked_wait
;
804 wait_queue_head_t async_submit_wait
;
807 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
808 * when they are updated.
810 * Because we do not clear the flags for ever, so we needn't use
811 * the lock on the read side.
813 * We also needn't use the lock when we mount the fs, because
814 * there is no other task which will update the flag.
816 spinlock_t super_lock
;
817 struct btrfs_super_block
*super_copy
;
818 struct btrfs_super_block
*super_for_commit
;
819 struct super_block
*sb
;
820 struct inode
*btree_inode
;
821 struct backing_dev_info bdi
;
822 struct mutex tree_log_mutex
;
823 struct mutex transaction_kthread_mutex
;
824 struct mutex cleaner_mutex
;
825 struct mutex chunk_mutex
;
826 struct mutex volume_mutex
;
829 * this is taken to make sure we don't set block groups ro after
830 * the free space cache has been allocated on them
832 struct mutex ro_block_group_mutex
;
834 /* this is used during read/modify/write to make sure
835 * no two ios are trying to mod the same stripe at the same
838 struct btrfs_stripe_hash_table
*stripe_hash_table
;
841 * this protects the ordered operations list only while we are
842 * processing all of the entries on it. This way we make
843 * sure the commit code doesn't find the list temporarily empty
844 * because another function happens to be doing non-waiting preflush
845 * before jumping into the main commit.
847 struct mutex ordered_operations_mutex
;
849 struct rw_semaphore commit_root_sem
;
851 struct rw_semaphore cleanup_work_sem
;
853 struct rw_semaphore subvol_sem
;
854 struct srcu_struct subvol_srcu
;
856 spinlock_t trans_lock
;
858 * the reloc mutex goes with the trans lock, it is taken
859 * during commit to protect us from the relocation code
861 struct mutex reloc_mutex
;
863 struct list_head trans_list
;
864 struct list_head dead_roots
;
865 struct list_head caching_block_groups
;
867 spinlock_t delayed_iput_lock
;
868 struct list_head delayed_iputs
;
869 struct mutex cleaner_delayed_iput_mutex
;
871 /* this protects tree_mod_seq_list */
872 spinlock_t tree_mod_seq_lock
;
873 atomic64_t tree_mod_seq
;
874 struct list_head tree_mod_seq_list
;
876 /* this protects tree_mod_log */
877 rwlock_t tree_mod_log_lock
;
878 struct rb_root tree_mod_log
;
880 atomic_t nr_async_submits
;
881 atomic_t async_submit_draining
;
882 atomic_t nr_async_bios
;
883 atomic_t async_delalloc_pages
;
884 atomic_t open_ioctl_trans
;
887 * this is used to protect the following list -- ordered_roots.
889 spinlock_t ordered_root_lock
;
892 * all fs/file tree roots in which there are data=ordered extents
893 * pending writeback are added into this list.
895 * these can span multiple transactions and basically include
896 * every dirty data page that isn't from nodatacow
898 struct list_head ordered_roots
;
900 struct mutex delalloc_root_mutex
;
901 spinlock_t delalloc_root_lock
;
902 /* all fs/file tree roots that have delalloc inodes. */
903 struct list_head delalloc_roots
;
906 * there is a pool of worker threads for checksumming during writes
907 * and a pool for checksumming after reads. This is because readers
908 * can run with FS locks held, and the writers may be waiting for
909 * those locks. We don't want ordering in the pending list to cause
910 * deadlocks, and so the two are serviced separately.
912 * A third pool does submit_bio to avoid deadlocking with the other
915 struct btrfs_workqueue
*workers
;
916 struct btrfs_workqueue
*delalloc_workers
;
917 struct btrfs_workqueue
*flush_workers
;
918 struct btrfs_workqueue
*endio_workers
;
919 struct btrfs_workqueue
*endio_meta_workers
;
920 struct btrfs_workqueue
*endio_raid56_workers
;
921 struct btrfs_workqueue
*endio_repair_workers
;
922 struct btrfs_workqueue
*rmw_workers
;
923 struct btrfs_workqueue
*endio_meta_write_workers
;
924 struct btrfs_workqueue
*endio_write_workers
;
925 struct btrfs_workqueue
*endio_freespace_worker
;
926 struct btrfs_workqueue
*submit_workers
;
927 struct btrfs_workqueue
*caching_workers
;
928 struct btrfs_workqueue
*readahead_workers
;
931 * fixup workers take dirty pages that didn't properly go through
932 * the cow mechanism and make them safe to write. It happens
933 * for the sys_munmap function call path
935 struct btrfs_workqueue
*fixup_workers
;
936 struct btrfs_workqueue
*delayed_workers
;
938 /* the extent workers do delayed refs on the extent allocation tree */
939 struct btrfs_workqueue
*extent_workers
;
940 struct task_struct
*transaction_kthread
;
941 struct task_struct
*cleaner_kthread
;
942 int thread_pool_size
;
944 struct kobject
*space_info_kobj
;
948 /* used to keep from writing metadata until there is a nice batch */
949 struct percpu_counter dirty_metadata_bytes
;
950 struct percpu_counter delalloc_bytes
;
951 s32 dirty_metadata_batch
;
954 struct list_head dirty_cowonly_roots
;
956 struct btrfs_fs_devices
*fs_devices
;
959 * the space_info list is almost entirely read only. It only changes
960 * when we add a new raid type to the FS, and that happens
961 * very rarely. RCU is used to protect it.
963 struct list_head space_info
;
965 struct btrfs_space_info
*data_sinfo
;
967 struct reloc_control
*reloc_ctl
;
969 /* data_alloc_cluster is only used in ssd mode */
970 struct btrfs_free_cluster data_alloc_cluster
;
972 /* all metadata allocations go through this cluster */
973 struct btrfs_free_cluster meta_alloc_cluster
;
975 /* auto defrag inodes go here */
976 spinlock_t defrag_inodes_lock
;
977 struct rb_root defrag_inodes
;
978 atomic_t defrag_running
;
980 /* Used to protect avail_{data, metadata, system}_alloc_bits */
981 seqlock_t profiles_lock
;
983 * these three are in extended format (availability of single
984 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
985 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
987 u64 avail_data_alloc_bits
;
988 u64 avail_metadata_alloc_bits
;
989 u64 avail_system_alloc_bits
;
991 /* restriper state */
992 spinlock_t balance_lock
;
993 struct mutex balance_mutex
;
994 atomic_t balance_running
;
995 atomic_t balance_pause_req
;
996 atomic_t balance_cancel_req
;
997 struct btrfs_balance_control
*balance_ctl
;
998 wait_queue_head_t balance_wait_q
;
1000 unsigned data_chunk_allocations
;
1001 unsigned metadata_ratio
;
1005 /* private scrub information */
1006 struct mutex scrub_lock
;
1007 atomic_t scrubs_running
;
1008 atomic_t scrub_pause_req
;
1009 atomic_t scrubs_paused
;
1010 atomic_t scrub_cancel_req
;
1011 wait_queue_head_t scrub_pause_wait
;
1012 int scrub_workers_refcnt
;
1013 struct btrfs_workqueue
*scrub_workers
;
1014 struct btrfs_workqueue
*scrub_wr_completion_workers
;
1015 struct btrfs_workqueue
*scrub_nocow_workers
;
1016 struct btrfs_workqueue
*scrub_parity_workers
;
1018 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1019 u32 check_integrity_print_mask
;
1021 /* is qgroup tracking in a consistent state? */
1024 /* holds configuration and tracking. Protected by qgroup_lock */
1025 struct rb_root qgroup_tree
;
1026 struct rb_root qgroup_op_tree
;
1027 spinlock_t qgroup_lock
;
1028 spinlock_t qgroup_op_lock
;
1029 atomic_t qgroup_op_seq
;
1032 * used to avoid frequently calling ulist_alloc()/ulist_free()
1033 * when doing qgroup accounting, it must be protected by qgroup_lock.
1035 struct ulist
*qgroup_ulist
;
1037 /* protect user change for quota operations */
1038 struct mutex qgroup_ioctl_lock
;
1040 /* list of dirty qgroups to be written at next commit */
1041 struct list_head dirty_qgroups
;
1043 /* used by qgroup for an efficient tree traversal */
1046 /* qgroup rescan items */
1047 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1048 struct btrfs_key qgroup_rescan_progress
;
1049 struct btrfs_workqueue
*qgroup_rescan_workers
;
1050 struct completion qgroup_rescan_completion
;
1051 struct btrfs_work qgroup_rescan_work
;
1052 bool qgroup_rescan_running
; /* protected by qgroup_rescan_lock */
1054 /* filesystem state */
1055 unsigned long fs_state
;
1057 struct btrfs_delayed_root
*delayed_root
;
1059 /* readahead tree */
1060 spinlock_t reada_lock
;
1061 struct radix_tree_root reada_tree
;
1063 /* readahead works cnt */
1064 atomic_t reada_works_cnt
;
1066 /* Extent buffer radix tree */
1067 spinlock_t buffer_lock
;
1068 struct radix_tree_root buffer_radix
;
1070 /* next backup root to be overwritten */
1071 int backup_root_index
;
1073 int num_tolerated_disk_barrier_failures
;
1075 /* device replace state */
1076 struct btrfs_dev_replace dev_replace
;
1078 struct percpu_counter bio_counter
;
1079 wait_queue_head_t replace_wait
;
1081 struct semaphore uuid_tree_rescan_sem
;
1083 /* Used to reclaim the metadata space in the background. */
1084 struct work_struct async_reclaim_work
;
1086 spinlock_t unused_bgs_lock
;
1087 struct list_head unused_bgs
;
1088 struct mutex unused_bg_unpin_mutex
;
1089 struct mutex delete_unused_bgs_mutex
;
1091 /* For btrfs to record security options */
1092 struct security_mnt_opts security_opts
;
1095 * Chunks that can't be freed yet (under a trim/discard operation)
1096 * and will be latter freed. Protected by fs_info->chunk_mutex.
1098 struct list_head pinned_chunks
;
1100 /* Used to record internally whether fs has been frozen */
1103 /* Cached block sizes */
1109 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
1111 return sb
->s_fs_info
;
1114 struct btrfs_subvolume_writers
{
1115 struct percpu_counter counter
;
1116 wait_queue_head_t wait
;
1120 * The state of btrfs root
1123 * btrfs_record_root_in_trans is a multi-step process,
1124 * and it can race with the balancing code. But the
1125 * race is very small, and only the first time the root
1126 * is added to each transaction. So IN_TRANS_SETUP
1127 * is used to tell us when more checks are required
1129 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1130 #define BTRFS_ROOT_REF_COWS 1
1131 #define BTRFS_ROOT_TRACK_DIRTY 2
1132 #define BTRFS_ROOT_IN_RADIX 3
1133 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1134 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1135 #define BTRFS_ROOT_FORCE_COW 6
1136 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1137 #define BTRFS_ROOT_DIRTY 8
1140 * in ram representation of the tree. extent_root is used for all allocations
1141 * and for the extent tree extent_root root.
1144 struct extent_buffer
*node
;
1146 struct extent_buffer
*commit_root
;
1147 struct btrfs_root
*log_root
;
1148 struct btrfs_root
*reloc_root
;
1150 unsigned long state
;
1151 struct btrfs_root_item root_item
;
1152 struct btrfs_key root_key
;
1153 struct btrfs_fs_info
*fs_info
;
1154 struct extent_io_tree dirty_log_pages
;
1156 struct mutex objectid_mutex
;
1158 spinlock_t accounting_lock
;
1159 struct btrfs_block_rsv
*block_rsv
;
1161 /* free ino cache stuff */
1162 struct btrfs_free_space_ctl
*free_ino_ctl
;
1163 enum btrfs_caching_type ino_cache_state
;
1164 spinlock_t ino_cache_lock
;
1165 wait_queue_head_t ino_cache_wait
;
1166 struct btrfs_free_space_ctl
*free_ino_pinned
;
1167 u64 ino_cache_progress
;
1168 struct inode
*ino_cache_inode
;
1170 struct mutex log_mutex
;
1171 wait_queue_head_t log_writer_wait
;
1172 wait_queue_head_t log_commit_wait
[2];
1173 struct list_head log_ctxs
[2];
1174 atomic_t log_writers
;
1175 atomic_t log_commit
[2];
1178 /* No matter the commit succeeds or not*/
1179 int log_transid_committed
;
1180 /* Just be updated when the commit succeeds. */
1181 int last_log_commit
;
1182 pid_t log_start_pid
;
1189 u64 highest_objectid
;
1191 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1192 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1196 u64 defrag_trans_start
;
1197 struct btrfs_key defrag_progress
;
1198 struct btrfs_key defrag_max
;
1201 /* the dirty list is only used by non-reference counted roots */
1202 struct list_head dirty_list
;
1204 struct list_head root_list
;
1206 spinlock_t log_extents_lock
[2];
1207 struct list_head logged_list
[2];
1209 spinlock_t orphan_lock
;
1210 atomic_t orphan_inodes
;
1211 struct btrfs_block_rsv
*orphan_block_rsv
;
1212 int orphan_cleanup_state
;
1214 spinlock_t inode_lock
;
1215 /* red-black tree that keeps track of in-memory inodes */
1216 struct rb_root inode_tree
;
1219 * radix tree that keeps track of delayed nodes of every inode,
1220 * protected by inode_lock
1222 struct radix_tree_root delayed_nodes_tree
;
1224 * right now this just gets used so that a root has its own devid
1225 * for stat. It may be used for more later
1229 spinlock_t root_item_lock
;
1232 struct mutex delalloc_mutex
;
1233 spinlock_t delalloc_lock
;
1235 * all of the inodes that have delalloc bytes. It is possible for
1236 * this list to be empty even when there is still dirty data=ordered
1237 * extents waiting to finish IO.
1239 struct list_head delalloc_inodes
;
1240 struct list_head delalloc_root
;
1241 u64 nr_delalloc_inodes
;
1243 struct mutex ordered_extent_mutex
;
1245 * this is used by the balancing code to wait for all the pending
1248 spinlock_t ordered_extent_lock
;
1251 * all of the data=ordered extents pending writeback
1252 * these can span multiple transactions and basically include
1253 * every dirty data page that isn't from nodatacow
1255 struct list_head ordered_extents
;
1256 struct list_head ordered_root
;
1257 u64 nr_ordered_extents
;
1260 * Number of currently running SEND ioctls to prevent
1261 * manipulation with the read-only status via SUBVOL_SETFLAGS
1263 int send_in_progress
;
1264 struct btrfs_subvolume_writers
*subv_writers
;
1265 atomic_t will_be_snapshoted
;
1267 /* For qgroup metadata space reserve */
1268 atomic64_t qgroup_meta_rsv
;
1270 static inline u32
btrfs_inode_sectorsize(const struct inode
*inode
)
1272 return btrfs_sb(inode
->i_sb
)->sectorsize
;
1275 static inline u32
__BTRFS_LEAF_DATA_SIZE(u32 blocksize
)
1277 return blocksize
- sizeof(struct btrfs_header
);
1280 static inline u32
BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info
*info
)
1282 return __BTRFS_LEAF_DATA_SIZE(info
->nodesize
);
1285 static inline u32
BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info
*info
)
1287 return BTRFS_LEAF_DATA_SIZE(info
) - sizeof(struct btrfs_item
);
1290 static inline u32
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info
*info
)
1292 return BTRFS_LEAF_DATA_SIZE(info
) / sizeof(struct btrfs_key_ptr
);
1295 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1296 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1297 static inline u32
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info
*info
)
1299 return BTRFS_MAX_ITEM_SIZE(info
) -
1300 BTRFS_FILE_EXTENT_INLINE_DATA_START
;
1303 static inline u32
BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info
*info
)
1305 return BTRFS_MAX_ITEM_SIZE(info
) - sizeof(struct btrfs_dir_item
);
1309 * Flags for mount options.
1311 * Note: don't forget to add new options to btrfs_show_options()
1313 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1314 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1315 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1316 #define BTRFS_MOUNT_SSD (1 << 3)
1317 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1318 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1319 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1320 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1321 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1322 #define BTRFS_MOUNT_NOSSD (1 << 9)
1323 #define BTRFS_MOUNT_DISCARD (1 << 10)
1324 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1325 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1326 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1327 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1328 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1329 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1330 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1331 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1332 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1333 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1334 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1335 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1336 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1337 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1338 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1339 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1340 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1342 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1343 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1345 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1346 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1347 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1348 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1351 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1353 if (!btrfs_test_opt(fs_info, opt)) \
1354 btrfs_info(fs_info, fmt, ##args); \
1355 btrfs_set_opt(fs_info->mount_opt, opt); \
1358 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1360 if (btrfs_test_opt(fs_info, opt)) \
1361 btrfs_info(fs_info, fmt, ##args); \
1362 btrfs_clear_opt(fs_info->mount_opt, opt); \
1365 #ifdef CONFIG_BTRFS_DEBUG
1367 btrfs_should_fragment_free_space(struct btrfs_block_group_cache
*block_group
)
1369 struct btrfs_fs_info
*fs_info
= block_group
->fs_info
;
1371 return (btrfs_test_opt(fs_info
, FRAGMENT_METADATA
) &&
1372 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1373 (btrfs_test_opt(fs_info
, FRAGMENT_DATA
) &&
1374 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1379 * Requests for changes that need to be done during transaction commit.
1381 * Internal mount options that are used for special handling of the real
1382 * mount options (eg. cannot be set during remount and have to be set during
1383 * transaction commit)
1386 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1387 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1388 #define BTRFS_PENDING_COMMIT (2)
1390 #define btrfs_test_pending(info, opt) \
1391 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1392 #define btrfs_set_pending(info, opt) \
1393 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1394 #define btrfs_clear_pending(info, opt) \
1395 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1398 * Helpers for setting pending mount option changes.
1400 * Expects corresponding macros
1401 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1403 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1405 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1406 btrfs_info((info), fmt, ##args); \
1407 btrfs_set_pending((info), SET_##opt); \
1408 btrfs_clear_pending((info), CLEAR_##opt); \
1412 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1414 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1415 btrfs_info((info), fmt, ##args); \
1416 btrfs_set_pending((info), CLEAR_##opt); \
1417 btrfs_clear_pending((info), SET_##opt); \
1424 #define BTRFS_INODE_NODATASUM (1 << 0)
1425 #define BTRFS_INODE_NODATACOW (1 << 1)
1426 #define BTRFS_INODE_READONLY (1 << 2)
1427 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1428 #define BTRFS_INODE_PREALLOC (1 << 4)
1429 #define BTRFS_INODE_SYNC (1 << 5)
1430 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1431 #define BTRFS_INODE_APPEND (1 << 7)
1432 #define BTRFS_INODE_NODUMP (1 << 8)
1433 #define BTRFS_INODE_NOATIME (1 << 9)
1434 #define BTRFS_INODE_DIRSYNC (1 << 10)
1435 #define BTRFS_INODE_COMPRESS (1 << 11)
1437 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1439 struct btrfs_map_token
{
1440 struct extent_buffer
*eb
;
1442 unsigned long offset
;
1445 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1446 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1448 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1450 token
->kaddr
= NULL
;
1453 /* some macros to generate set/get functions for the struct fields. This
1454 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1457 #define le8_to_cpu(v) (v)
1458 #define cpu_to_le8(v) (v)
1461 #define read_eb_member(eb, ptr, type, member, result) (\
1462 read_extent_buffer(eb, (char *)(result), \
1463 ((unsigned long)(ptr)) + \
1464 offsetof(type, member), \
1465 sizeof(((type *)0)->member)))
1467 #define write_eb_member(eb, ptr, type, member, result) (\
1468 write_extent_buffer(eb, (char *)(result), \
1469 ((unsigned long)(ptr)) + \
1470 offsetof(type, member), \
1471 sizeof(((type *)0)->member)))
1473 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1474 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1475 unsigned long off, \
1476 struct btrfs_map_token *token); \
1477 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1478 unsigned long off, u##bits val, \
1479 struct btrfs_map_token *token); \
1480 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1481 unsigned long off) \
1483 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1485 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1486 unsigned long off, u##bits val) \
1488 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1491 DECLARE_BTRFS_SETGET_BITS(8)
1492 DECLARE_BTRFS_SETGET_BITS(16)
1493 DECLARE_BTRFS_SETGET_BITS(32)
1494 DECLARE_BTRFS_SETGET_BITS(64)
1496 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1497 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1499 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1500 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1502 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1505 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1506 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1508 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1509 struct btrfs_map_token *token) \
1511 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1512 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1514 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1515 type *s, u##bits val, \
1516 struct btrfs_map_token *token) \
1518 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1519 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1522 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1523 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1525 type *p = page_address(eb->pages[0]); \
1526 u##bits res = le##bits##_to_cpu(p->member); \
1529 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1532 type *p = page_address(eb->pages[0]); \
1533 p->member = cpu_to_le##bits(val); \
1536 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1537 static inline u##bits btrfs_##name(type *s) \
1539 return le##bits##_to_cpu(s->member); \
1541 static inline void btrfs_set_##name(type *s, u##bits val) \
1543 s->member = cpu_to_le##bits(val); \
1546 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1547 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1548 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1549 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1550 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1551 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1553 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1554 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1555 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1556 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1557 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1558 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1560 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1561 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1563 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1565 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1567 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1569 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1571 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1572 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1574 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1576 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1578 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1581 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1583 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1586 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1588 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1591 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1592 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1593 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1594 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1595 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1596 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1597 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1598 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1599 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1600 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1601 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1603 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1605 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1608 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1609 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1610 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1612 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1614 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1616 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1618 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1619 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1621 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1623 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1624 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1626 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1629 unsigned long offset
= (unsigned long)c
;
1630 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1631 offset
+= nr
* sizeof(struct btrfs_stripe
);
1632 return (struct btrfs_stripe
*)offset
;
1635 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1637 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1640 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1641 struct btrfs_chunk
*c
, int nr
)
1643 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1646 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1647 struct btrfs_chunk
*c
, int nr
)
1649 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1652 /* struct btrfs_block_group_item */
1653 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1655 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1657 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1658 struct btrfs_block_group_item
, chunk_objectid
, 64);
1660 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1661 struct btrfs_block_group_item
, chunk_objectid
, 64);
1662 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1663 struct btrfs_block_group_item
, flags
, 64);
1664 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1665 struct btrfs_block_group_item
, flags
, 64);
1667 /* struct btrfs_free_space_info */
1668 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1670 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1672 /* struct btrfs_inode_ref */
1673 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1674 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1676 /* struct btrfs_inode_extref */
1677 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1678 parent_objectid
, 64);
1679 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1681 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1683 /* struct btrfs_inode_item */
1684 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1685 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1686 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1687 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1688 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1689 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1690 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1691 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1692 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1693 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1694 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1695 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1696 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1698 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1700 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1702 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1703 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1705 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1707 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1708 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1709 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1710 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1711 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1712 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1713 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1714 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1715 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1716 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1718 /* struct btrfs_dev_extent */
1719 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1721 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1722 chunk_objectid
, 64);
1723 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1725 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1727 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1729 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1730 return (unsigned long)dev
+ ptr
;
1733 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1734 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1736 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1738 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1741 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1743 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1744 struct btrfs_tree_block_info
*item
,
1745 struct btrfs_disk_key
*key
)
1747 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1750 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1751 struct btrfs_tree_block_info
*item
,
1752 struct btrfs_disk_key
*key
)
1754 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1757 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1759 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1761 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1763 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1766 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1769 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1771 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1774 static inline u32
btrfs_extent_inline_ref_size(int type
)
1776 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1777 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1778 return sizeof(struct btrfs_extent_inline_ref
);
1779 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1780 return sizeof(struct btrfs_shared_data_ref
) +
1781 sizeof(struct btrfs_extent_inline_ref
);
1782 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1783 return sizeof(struct btrfs_extent_data_ref
) +
1784 offsetof(struct btrfs_extent_inline_ref
, offset
);
1789 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1790 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1792 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1793 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1795 /* struct btrfs_node */
1796 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1797 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1798 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1800 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1803 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1806 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1807 sizeof(struct btrfs_key_ptr
) * nr
;
1808 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1811 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1815 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1816 sizeof(struct btrfs_key_ptr
) * nr
;
1817 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1820 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1823 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1824 sizeof(struct btrfs_key_ptr
) * nr
;
1825 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1828 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1832 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1833 sizeof(struct btrfs_key_ptr
) * nr
;
1834 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1837 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1839 return offsetof(struct btrfs_node
, ptrs
) +
1840 sizeof(struct btrfs_key_ptr
) * nr
;
1843 void btrfs_node_key(struct extent_buffer
*eb
,
1844 struct btrfs_disk_key
*disk_key
, int nr
);
1846 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1847 struct btrfs_disk_key
*disk_key
, int nr
)
1850 ptr
= btrfs_node_key_ptr_offset(nr
);
1851 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1852 struct btrfs_key_ptr
, key
, disk_key
);
1855 /* struct btrfs_item */
1856 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1857 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1858 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1859 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1861 static inline unsigned long btrfs_item_nr_offset(int nr
)
1863 return offsetof(struct btrfs_leaf
, items
) +
1864 sizeof(struct btrfs_item
) * nr
;
1867 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1869 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1872 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1873 struct btrfs_item
*item
)
1875 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1878 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1880 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1883 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1885 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1888 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1890 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1893 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1894 struct btrfs_disk_key
*disk_key
, int nr
)
1896 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1897 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1900 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1901 struct btrfs_disk_key
*disk_key
, int nr
)
1903 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1904 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1907 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1910 * struct btrfs_root_ref
1912 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1913 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1914 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1916 /* struct btrfs_dir_item */
1917 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1918 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1919 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1920 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1921 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1922 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1924 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1926 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1929 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1930 struct btrfs_dir_item
*item
,
1931 struct btrfs_disk_key
*key
)
1933 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1936 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1937 struct btrfs_dir_item
*item
,
1938 struct btrfs_disk_key
*key
)
1940 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1943 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1945 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1947 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1950 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1951 struct btrfs_free_space_header
*h
,
1952 struct btrfs_disk_key
*key
)
1954 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1957 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1958 struct btrfs_free_space_header
*h
,
1959 struct btrfs_disk_key
*key
)
1961 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1964 /* struct btrfs_disk_key */
1965 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1967 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1968 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1970 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1971 const struct btrfs_disk_key
*disk
)
1973 cpu
->offset
= le64_to_cpu(disk
->offset
);
1974 cpu
->type
= disk
->type
;
1975 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1978 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1979 const struct btrfs_key
*cpu
)
1981 disk
->offset
= cpu_to_le64(cpu
->offset
);
1982 disk
->type
= cpu
->type
;
1983 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1986 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1987 struct btrfs_key
*key
, int nr
)
1989 struct btrfs_disk_key disk_key
;
1990 btrfs_node_key(eb
, &disk_key
, nr
);
1991 btrfs_disk_key_to_cpu(key
, &disk_key
);
1994 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1995 struct btrfs_key
*key
, int nr
)
1997 struct btrfs_disk_key disk_key
;
1998 btrfs_item_key(eb
, &disk_key
, nr
);
1999 btrfs_disk_key_to_cpu(key
, &disk_key
);
2002 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
2003 struct btrfs_dir_item
*item
,
2004 struct btrfs_key
*key
)
2006 struct btrfs_disk_key disk_key
;
2007 btrfs_dir_item_key(eb
, item
, &disk_key
);
2008 btrfs_disk_key_to_cpu(key
, &disk_key
);
2011 static inline u8
btrfs_key_type(const struct btrfs_key
*key
)
2016 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2021 /* struct btrfs_header */
2022 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2023 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2025 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2026 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2027 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2028 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2029 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2031 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2032 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2034 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2036 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2038 return (btrfs_header_flags(eb
) & flag
) == flag
;
2041 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2043 u64 flags
= btrfs_header_flags(eb
);
2044 btrfs_set_header_flags(eb
, flags
| flag
);
2045 return (flags
& flag
) == flag
;
2048 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2050 u64 flags
= btrfs_header_flags(eb
);
2051 btrfs_set_header_flags(eb
, flags
& ~flag
);
2052 return (flags
& flag
) == flag
;
2055 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2057 u64 flags
= btrfs_header_flags(eb
);
2058 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2061 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2064 u64 flags
= btrfs_header_flags(eb
);
2065 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2066 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2067 btrfs_set_header_flags(eb
, flags
);
2070 static inline unsigned long btrfs_header_fsid(void)
2072 return offsetof(struct btrfs_header
, fsid
);
2075 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2077 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2080 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2082 return btrfs_header_level(eb
) == 0;
2085 /* struct btrfs_root_item */
2086 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2088 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2089 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2090 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2092 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2094 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2095 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2096 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2097 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2098 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2099 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2100 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2101 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2103 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2105 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2107 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2109 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2111 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2114 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2116 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2119 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2121 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2124 /* struct btrfs_root_backup */
2125 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2127 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2129 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2130 tree_root_level
, 8);
2132 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2134 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2135 chunk_root_gen
, 64);
2136 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2137 chunk_root_level
, 8);
2139 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2141 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2142 extent_root_gen
, 64);
2143 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2144 extent_root_level
, 8);
2146 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2148 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2150 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2153 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2155 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2157 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2160 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2162 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2164 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2165 csum_root_level
, 8);
2166 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2168 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2170 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2173 /* struct btrfs_balance_item */
2174 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2176 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2177 struct btrfs_balance_item
*bi
,
2178 struct btrfs_disk_balance_args
*ba
)
2180 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2183 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2184 struct btrfs_balance_item
*bi
,
2185 struct btrfs_disk_balance_args
*ba
)
2187 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2190 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2191 struct btrfs_balance_item
*bi
,
2192 struct btrfs_disk_balance_args
*ba
)
2194 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2197 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2198 struct btrfs_balance_item
*bi
,
2199 struct btrfs_disk_balance_args
*ba
)
2201 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2204 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2205 struct btrfs_balance_item
*bi
,
2206 struct btrfs_disk_balance_args
*ba
)
2208 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2211 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2212 struct btrfs_balance_item
*bi
,
2213 struct btrfs_disk_balance_args
*ba
)
2215 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2219 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2220 struct btrfs_disk_balance_args
*disk
)
2222 memset(cpu
, 0, sizeof(*cpu
));
2224 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2225 cpu
->usage
= le64_to_cpu(disk
->usage
);
2226 cpu
->devid
= le64_to_cpu(disk
->devid
);
2227 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2228 cpu
->pend
= le64_to_cpu(disk
->pend
);
2229 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2230 cpu
->vend
= le64_to_cpu(disk
->vend
);
2231 cpu
->target
= le64_to_cpu(disk
->target
);
2232 cpu
->flags
= le64_to_cpu(disk
->flags
);
2233 cpu
->limit
= le64_to_cpu(disk
->limit
);
2234 cpu
->stripes_min
= le32_to_cpu(disk
->stripes_min
);
2235 cpu
->stripes_max
= le32_to_cpu(disk
->stripes_max
);
2239 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2240 struct btrfs_balance_args
*cpu
)
2242 memset(disk
, 0, sizeof(*disk
));
2244 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2245 disk
->usage
= cpu_to_le64(cpu
->usage
);
2246 disk
->devid
= cpu_to_le64(cpu
->devid
);
2247 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2248 disk
->pend
= cpu_to_le64(cpu
->pend
);
2249 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2250 disk
->vend
= cpu_to_le64(cpu
->vend
);
2251 disk
->target
= cpu_to_le64(cpu
->target
);
2252 disk
->flags
= cpu_to_le64(cpu
->flags
);
2253 disk
->limit
= cpu_to_le64(cpu
->limit
);
2254 disk
->stripes_min
= cpu_to_le32(cpu
->stripes_min
);
2255 disk
->stripes_max
= cpu_to_le32(cpu
->stripes_max
);
2258 /* struct btrfs_super_block */
2259 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2260 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2261 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2263 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2264 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2265 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2266 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2267 struct btrfs_super_block
, chunk_root_generation
, 64);
2268 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2270 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2272 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2273 chunk_root_level
, 8);
2274 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2276 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2277 log_root_transid
, 64);
2278 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2280 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2282 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2284 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2286 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2288 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2290 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2291 root_dir_objectid
, 64);
2292 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2294 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2296 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2297 compat_ro_flags
, 64);
2298 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2299 incompat_flags
, 64);
2300 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2302 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2303 cache_generation
, 64);
2304 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2305 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2306 uuid_tree_generation
, 64);
2308 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2310 u16 t
= btrfs_super_csum_type(s
);
2312 * csum type is validated at mount time
2314 return btrfs_csum_sizes
[t
];
2317 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2319 return offsetof(struct btrfs_leaf
, items
);
2323 * The leaf data grows from end-to-front in the node.
2324 * this returns the address of the start of the last item,
2325 * which is the stop of the leaf data stack
2327 static inline unsigned int leaf_data_end(struct btrfs_fs_info
*fs_info
,
2328 struct extent_buffer
*leaf
)
2330 u32 nr
= btrfs_header_nritems(leaf
);
2333 return BTRFS_LEAF_DATA_SIZE(fs_info
);
2334 return btrfs_item_offset_nr(leaf
, nr
- 1);
2337 /* struct btrfs_file_extent_item */
2338 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2339 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2340 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2341 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2342 struct btrfs_file_extent_item
, offset
, 64);
2343 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2344 struct btrfs_file_extent_item
, generation
, 64);
2345 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2346 struct btrfs_file_extent_item
, num_bytes
, 64);
2347 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2348 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2349 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2350 struct btrfs_file_extent_item
, compression
, 8);
2352 static inline unsigned long
2353 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2355 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2358 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2360 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2363 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2365 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2367 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2368 disk_num_bytes
, 64);
2369 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2371 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2373 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2375 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2377 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2379 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2380 other_encoding
, 16);
2383 * this returns the number of bytes used by the item on disk, minus the
2384 * size of any extent headers. If a file is compressed on disk, this is
2385 * the compressed size
2387 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2388 struct btrfs_item
*e
)
2390 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2393 /* this returns the number of file bytes represented by the inline item.
2394 * If an item is compressed, this is the uncompressed size
2396 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2398 struct btrfs_file_extent_item
*fi
)
2400 struct btrfs_map_token token
;
2402 btrfs_init_map_token(&token
);
2404 * return the space used on disk if this item isn't
2405 * compressed or encoded
2407 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
2408 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
2409 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
2410 return btrfs_file_extent_inline_item_len(eb
,
2411 btrfs_item_nr(slot
));
2414 /* otherwise use the ram bytes field */
2415 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
2419 /* btrfs_dev_stats_item */
2420 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2421 struct btrfs_dev_stats_item
*ptr
,
2426 read_extent_buffer(eb
, &val
,
2427 offsetof(struct btrfs_dev_stats_item
, values
) +
2428 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2433 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2434 struct btrfs_dev_stats_item
*ptr
,
2437 write_extent_buffer(eb
, &val
,
2438 offsetof(struct btrfs_dev_stats_item
, values
) +
2439 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2443 /* btrfs_qgroup_status_item */
2444 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2446 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2448 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2450 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2453 /* btrfs_qgroup_info_item */
2454 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2456 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2457 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2459 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2460 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2463 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2464 struct btrfs_qgroup_info_item
, generation
, 64);
2465 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2467 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2468 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2471 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2472 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2474 /* btrfs_qgroup_limit_item */
2475 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2477 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2479 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2481 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2483 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2486 /* btrfs_dev_replace_item */
2487 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2488 struct btrfs_dev_replace_item
, src_devid
, 64);
2489 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2490 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2492 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2494 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2496 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2498 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2499 num_write_errors
, 64);
2500 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2501 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2503 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2505 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2508 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2509 struct btrfs_dev_replace_item
, src_devid
, 64);
2510 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2511 struct btrfs_dev_replace_item
,
2512 cont_reading_from_srcdev_mode
, 64);
2513 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2514 struct btrfs_dev_replace_item
, replace_state
, 64);
2515 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2516 struct btrfs_dev_replace_item
, time_started
, 64);
2517 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2518 struct btrfs_dev_replace_item
, time_stopped
, 64);
2519 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2520 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2521 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2522 struct btrfs_dev_replace_item
,
2523 num_uncorrectable_read_errors
, 64);
2524 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2525 struct btrfs_dev_replace_item
, cursor_left
, 64);
2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2527 struct btrfs_dev_replace_item
, cursor_right
, 64);
2529 /* helper function to cast into the data area of the leaf. */
2530 #define btrfs_item_ptr(leaf, slot, type) \
2531 ((type *)(btrfs_leaf_data(leaf) + \
2532 btrfs_item_offset_nr(leaf, slot)))
2534 #define btrfs_item_ptr_offset(leaf, slot) \
2535 ((unsigned long)(btrfs_leaf_data(leaf) + \
2536 btrfs_item_offset_nr(leaf, slot)))
2538 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2540 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2541 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2544 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2546 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2551 u64
btrfs_csum_bytes_to_leaves(struct btrfs_fs_info
*fs_info
, u64 csum_bytes
);
2553 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_fs_info
*fs_info
,
2556 return fs_info
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2560 * Doing a truncate won't result in new nodes or leaves, just what we need for
2563 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_fs_info
*fs_info
,
2566 return fs_info
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2569 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
2570 struct btrfs_fs_info
*fs_info
);
2571 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
2572 struct btrfs_fs_info
*fs_info
);
2573 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2575 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2576 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2577 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2578 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2579 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2580 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2581 struct btrfs_fs_info
*fs_info
, unsigned long count
);
2582 int btrfs_async_run_delayed_refs(struct btrfs_fs_info
*fs_info
,
2583 unsigned long count
, u64 transid
, int wait
);
2584 int btrfs_lookup_data_extent(struct btrfs_fs_info
*fs_info
, u64 start
, u64 len
);
2585 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2586 struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2587 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2588 int btrfs_pin_extent(struct btrfs_fs_info
*fs_info
,
2589 u64 bytenr
, u64 num
, int reserved
);
2590 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info
*fs_info
,
2591 u64 bytenr
, u64 num_bytes
);
2592 int btrfs_exclude_logged_extents(struct btrfs_fs_info
*fs_info
,
2593 struct extent_buffer
*eb
);
2594 int btrfs_cross_ref_exist(struct btrfs_root
*root
,
2595 u64 objectid
, u64 offset
, u64 bytenr
);
2596 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2597 struct btrfs_fs_info
*info
,
2599 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2600 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2601 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
2602 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2603 struct btrfs_root
*root
,
2604 u64 parent
, u64 root_objectid
,
2605 const struct btrfs_disk_key
*key
,
2606 int level
, u64 hint
,
2608 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2609 struct btrfs_root
*root
,
2610 struct extent_buffer
*buf
,
2611 u64 parent
, int last_ref
);
2612 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2613 u64 root_objectid
, u64 owner
,
2614 u64 offset
, u64 ram_bytes
,
2615 struct btrfs_key
*ins
);
2616 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2617 struct btrfs_fs_info
*fs_info
,
2618 u64 root_objectid
, u64 owner
, u64 offset
,
2619 struct btrfs_key
*ins
);
2620 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 ram_bytes
, u64 num_bytes
,
2621 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2622 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2623 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2624 struct extent_buffer
*buf
, int full_backref
);
2625 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2626 struct extent_buffer
*buf
, int full_backref
);
2627 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2628 struct btrfs_fs_info
*fs_info
,
2629 u64 bytenr
, u64 num_bytes
, u64 flags
,
2630 int level
, int is_data
);
2631 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2632 struct btrfs_fs_info
*fs_info
,
2633 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2634 u64 owner
, u64 offset
);
2636 int btrfs_free_reserved_extent(struct btrfs_fs_info
*fs_info
,
2637 u64 start
, u64 len
, int delalloc
);
2638 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info
*fs_info
,
2639 u64 start
, u64 len
);
2640 void btrfs_prepare_extent_commit(struct btrfs_fs_info
*fs_info
);
2641 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2642 struct btrfs_fs_info
*fs_info
);
2643 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2644 struct btrfs_fs_info
*fs_info
,
2645 u64 bytenr
, u64 num_bytes
, u64 parent
,
2646 u64 root_objectid
, u64 owner
, u64 offset
);
2648 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2649 struct btrfs_fs_info
*fs_info
);
2650 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2651 struct btrfs_fs_info
*fs_info
);
2652 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2653 struct btrfs_fs_info
*fs_info
);
2654 int btrfs_extent_readonly(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2655 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2656 int btrfs_read_block_groups(struct btrfs_fs_info
*info
);
2657 int btrfs_can_relocate(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2658 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2659 struct btrfs_fs_info
*fs_info
, u64 bytes_used
,
2660 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2662 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2663 struct btrfs_fs_info
*fs_info
,
2664 const u64 chunk_offset
);
2665 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2666 struct btrfs_fs_info
*fs_info
, u64 group_start
,
2667 struct extent_map
*em
);
2668 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2669 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2670 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2671 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
2672 struct btrfs_fs_info
*fs_info
);
2673 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2674 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2676 enum btrfs_reserve_flush_enum
{
2677 /* If we are in the transaction, we can't flush anything.*/
2678 BTRFS_RESERVE_NO_FLUSH
,
2680 * Flushing delalloc may cause deadlock somewhere, in this
2681 * case, use FLUSH LIMIT
2683 BTRFS_RESERVE_FLUSH_LIMIT
,
2684 BTRFS_RESERVE_FLUSH_ALL
,
2687 enum btrfs_flush_state
{
2688 FLUSH_DELAYED_ITEMS_NR
= 1,
2689 FLUSH_DELAYED_ITEMS
= 2,
2691 FLUSH_DELALLOC_WAIT
= 4,
2696 int btrfs_check_data_free_space(struct inode
*inode
, u64 start
, u64 len
);
2697 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode
*inode
, u64 bytes
);
2698 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 start
, u64 len
);
2699 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2701 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2702 struct btrfs_fs_info
*fs_info
);
2703 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2704 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2705 struct btrfs_inode
*inode
);
2706 void btrfs_orphan_release_metadata(struct btrfs_inode
*inode
);
2707 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2708 struct btrfs_block_rsv
*rsv
,
2710 u64
*qgroup_reserved
, bool use_global_rsv
);
2711 void btrfs_subvolume_release_metadata(struct btrfs_fs_info
*fs_info
,
2712 struct btrfs_block_rsv
*rsv
);
2713 int btrfs_delalloc_reserve_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2714 void btrfs_delalloc_release_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2715 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 start
, u64 len
);
2716 void btrfs_delalloc_release_space(struct inode
*inode
, u64 start
, u64 len
);
2717 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2718 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_fs_info
*fs_info
,
2719 unsigned short type
);
2720 void btrfs_free_block_rsv(struct btrfs_fs_info
*fs_info
,
2721 struct btrfs_block_rsv
*rsv
);
2722 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
2723 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2724 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2725 enum btrfs_reserve_flush_enum flush
);
2726 int btrfs_block_rsv_check(struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2727 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2728 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2729 enum btrfs_reserve_flush_enum flush
);
2730 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2731 struct btrfs_block_rsv
*dst_rsv
, u64 num_bytes
,
2733 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2734 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2736 void btrfs_block_rsv_release(struct btrfs_fs_info
*fs_info
,
2737 struct btrfs_block_rsv
*block_rsv
,
2739 int btrfs_inc_block_group_ro(struct btrfs_fs_info
*fs_info
,
2740 struct btrfs_block_group_cache
*cache
);
2741 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache
*cache
);
2742 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2743 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2744 int btrfs_error_unpin_extent_range(struct btrfs_fs_info
*fs_info
,
2745 u64 start
, u64 end
);
2746 int btrfs_discard_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2747 u64 num_bytes
, u64
*actual_bytes
);
2748 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2749 struct btrfs_fs_info
*fs_info
, u64 type
);
2750 int btrfs_trim_fs(struct btrfs_fs_info
*fs_info
, struct fstrim_range
*range
);
2752 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2753 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2754 struct btrfs_fs_info
*fs_info
);
2755 int __get_raid_index(u64 flags
);
2756 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
2757 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
2758 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2759 void check_system_chunk(struct btrfs_trans_handle
*trans
,
2760 struct btrfs_fs_info
*fs_info
, const u64 type
);
2761 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2762 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2765 int btrfs_bin_search(struct extent_buffer
*eb
, const struct btrfs_key
*key
,
2766 int level
, int *slot
);
2767 int btrfs_comp_cpu_keys(const struct btrfs_key
*k1
, const struct btrfs_key
*k2
);
2768 int btrfs_previous_item(struct btrfs_root
*root
,
2769 struct btrfs_path
*path
, u64 min_objectid
,
2771 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2772 struct btrfs_path
*path
, u64 min_objectid
);
2773 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2774 struct btrfs_path
*path
,
2775 const struct btrfs_key
*new_key
);
2776 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2777 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2778 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2779 struct btrfs_key
*key
, int lowest_level
,
2781 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2782 struct btrfs_path
*path
,
2784 enum btrfs_compare_tree_result
{
2785 BTRFS_COMPARE_TREE_NEW
,
2786 BTRFS_COMPARE_TREE_DELETED
,
2787 BTRFS_COMPARE_TREE_CHANGED
,
2788 BTRFS_COMPARE_TREE_SAME
,
2790 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2791 struct btrfs_root
*right_root
,
2792 struct btrfs_path
*left_path
,
2793 struct btrfs_path
*right_path
,
2794 struct btrfs_key
*key
,
2795 enum btrfs_compare_tree_result result
,
2797 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2798 struct btrfs_root
*right_root
,
2799 btrfs_changed_cb_t cb
, void *ctx
);
2800 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2801 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2802 struct extent_buffer
*parent
, int parent_slot
,
2803 struct extent_buffer
**cow_ret
);
2804 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2805 struct btrfs_root
*root
,
2806 struct extent_buffer
*buf
,
2807 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2808 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2809 struct extent_buffer
*buf
);
2810 void btrfs_extend_item(struct btrfs_fs_info
*fs_info
, struct btrfs_path
*path
,
2812 void btrfs_truncate_item(struct btrfs_fs_info
*fs_info
,
2813 struct btrfs_path
*path
, u32 new_size
, int from_end
);
2814 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2815 struct btrfs_root
*root
,
2816 struct btrfs_path
*path
,
2817 const struct btrfs_key
*new_key
,
2818 unsigned long split_offset
);
2819 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2820 struct btrfs_root
*root
,
2821 struct btrfs_path
*path
,
2822 const struct btrfs_key
*new_key
);
2823 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2824 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2825 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2826 const struct btrfs_key
*key
, struct btrfs_path
*p
,
2827 int ins_len
, int cow
);
2828 int btrfs_search_old_slot(struct btrfs_root
*root
, const struct btrfs_key
*key
,
2829 struct btrfs_path
*p
, u64 time_seq
);
2830 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2831 const struct btrfs_key
*key
,
2832 struct btrfs_path
*p
, int find_higher
,
2834 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2835 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2836 int start_slot
, u64
*last_ret
,
2837 struct btrfs_key
*progress
);
2838 void btrfs_release_path(struct btrfs_path
*p
);
2839 struct btrfs_path
*btrfs_alloc_path(void);
2840 void btrfs_free_path(struct btrfs_path
*p
);
2841 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2842 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2843 struct extent_buffer
*held
, int held_rw
);
2844 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2846 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2847 struct btrfs_path
*path
, int slot
, int nr
);
2848 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2849 struct btrfs_root
*root
,
2850 struct btrfs_path
*path
)
2852 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2855 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2856 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2857 u32 total_data
, u32 total_size
, int nr
);
2858 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2859 const struct btrfs_key
*key
, void *data
, u32 data_size
);
2860 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2861 struct btrfs_root
*root
,
2862 struct btrfs_path
*path
,
2863 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2866 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2867 struct btrfs_root
*root
,
2868 struct btrfs_path
*path
,
2869 const struct btrfs_key
*key
,
2872 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2875 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2876 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2877 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2879 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2880 struct btrfs_path
*p
, u64 time_seq
)
2883 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2884 return btrfs_next_old_leaf(root
, p
, time_seq
);
2887 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2889 return btrfs_next_old_item(root
, p
, 0);
2891 int btrfs_leaf_free_space(struct btrfs_fs_info
*fs_info
,
2892 struct extent_buffer
*leaf
);
2893 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2894 struct btrfs_block_rsv
*block_rsv
,
2895 int update_ref
, int for_reloc
);
2896 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2897 struct btrfs_root
*root
,
2898 struct extent_buffer
*node
,
2899 struct extent_buffer
*parent
);
2900 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2903 * Do it this way so we only ever do one test_bit in the normal case.
2905 if (test_bit(BTRFS_FS_CLOSING_START
, &fs_info
->flags
)) {
2906 if (test_bit(BTRFS_FS_CLOSING_DONE
, &fs_info
->flags
))
2914 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2915 * anything except sleeping. This function is used to check the status of
2918 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info
*fs_info
)
2920 return fs_info
->sb
->s_flags
& MS_RDONLY
|| btrfs_fs_closing(fs_info
);
2923 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2925 kfree(fs_info
->balance_ctl
);
2926 kfree(fs_info
->delayed_root
);
2927 kfree(fs_info
->extent_root
);
2928 kfree(fs_info
->tree_root
);
2929 kfree(fs_info
->chunk_root
);
2930 kfree(fs_info
->dev_root
);
2931 kfree(fs_info
->csum_root
);
2932 kfree(fs_info
->quota_root
);
2933 kfree(fs_info
->uuid_root
);
2934 kfree(fs_info
->free_space_root
);
2935 kfree(fs_info
->super_copy
);
2936 kfree(fs_info
->super_for_commit
);
2937 security_free_mnt_opts(&fs_info
->security_opts
);
2941 /* tree mod log functions from ctree.c */
2942 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2943 struct seq_list
*elem
);
2944 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2945 struct seq_list
*elem
);
2946 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2949 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2950 struct btrfs_fs_info
*fs_info
,
2951 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2952 const char *name
, int name_len
);
2953 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2954 struct btrfs_fs_info
*fs_info
,
2955 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2956 const char *name
, int name_len
);
2957 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2958 const struct btrfs_key
*key
);
2959 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2960 const struct btrfs_key
*key
,
2961 struct btrfs_root_item
*item
);
2962 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2963 struct btrfs_root
*root
,
2964 struct btrfs_key
*key
,
2965 struct btrfs_root_item
*item
);
2966 int btrfs_find_root(struct btrfs_root
*root
, const struct btrfs_key
*search_key
,
2967 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
2968 struct btrfs_key
*root_key
);
2969 int btrfs_find_orphan_roots(struct btrfs_fs_info
*fs_info
);
2970 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2971 struct extent_buffer
*node
);
2972 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2973 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
2974 struct btrfs_root
*root
);
2977 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
2978 struct btrfs_fs_info
*fs_info
, u8
*uuid
, u8 type
,
2980 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
2981 struct btrfs_fs_info
*fs_info
, u8
*uuid
, u8 type
,
2983 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
2984 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
2988 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
2989 const char *name
, int name_len
);
2990 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2991 struct btrfs_root
*root
, const char *name
,
2992 int name_len
, struct btrfs_inode
*dir
,
2993 struct btrfs_key
*location
, u8 type
, u64 index
);
2994 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2995 struct btrfs_root
*root
,
2996 struct btrfs_path
*path
, u64 dir
,
2997 const char *name
, int name_len
,
2999 struct btrfs_dir_item
*
3000 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3001 struct btrfs_root
*root
,
3002 struct btrfs_path
*path
, u64 dir
,
3003 u64 objectid
, const char *name
, int name_len
,
3005 struct btrfs_dir_item
*
3006 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3007 struct btrfs_path
*path
, u64 dirid
,
3008 const char *name
, int name_len
);
3009 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3010 struct btrfs_root
*root
,
3011 struct btrfs_path
*path
,
3012 struct btrfs_dir_item
*di
);
3013 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3014 struct btrfs_root
*root
,
3015 struct btrfs_path
*path
, u64 objectid
,
3016 const char *name
, u16 name_len
,
3017 const void *data
, u16 data_len
);
3018 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3019 struct btrfs_root
*root
,
3020 struct btrfs_path
*path
, u64 dir
,
3021 const char *name
, u16 name_len
,
3023 int verify_dir_item(struct btrfs_fs_info
*fs_info
,
3024 struct extent_buffer
*leaf
,
3025 struct btrfs_dir_item
*dir_item
);
3026 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_fs_info
*fs_info
,
3027 struct btrfs_path
*path
,
3032 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3033 struct btrfs_root
*root
, u64 offset
);
3034 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3035 struct btrfs_root
*root
, u64 offset
);
3036 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3039 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3040 struct btrfs_root
*root
,
3041 const char *name
, int name_len
,
3042 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3043 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3044 struct btrfs_root
*root
,
3045 const char *name
, int name_len
,
3046 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3047 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3048 struct btrfs_root
*root
,
3049 struct btrfs_path
*path
, u64 objectid
);
3050 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3051 *root
, struct btrfs_path
*path
,
3052 struct btrfs_key
*location
, int mod
);
3054 struct btrfs_inode_extref
*
3055 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3056 struct btrfs_root
*root
,
3057 struct btrfs_path
*path
,
3058 const char *name
, int name_len
,
3059 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3062 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3063 u64 ref_objectid
, const char *name
,
3065 struct btrfs_inode_extref
**extref_ret
);
3068 struct btrfs_dio_private
;
3069 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3070 struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 len
);
3071 int btrfs_lookup_bio_sums(struct inode
*inode
, struct bio
*bio
, u32
*dst
);
3072 int btrfs_lookup_bio_sums_dio(struct inode
*inode
, struct bio
*bio
,
3073 u64 logical_offset
);
3074 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3075 struct btrfs_root
*root
,
3076 u64 objectid
, u64 pos
,
3077 u64 disk_offset
, u64 disk_num_bytes
,
3078 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3079 u8 compression
, u8 encryption
, u16 other_encoding
);
3080 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3081 struct btrfs_root
*root
,
3082 struct btrfs_path
*path
, u64 objectid
,
3083 u64 bytenr
, int mod
);
3084 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3085 struct btrfs_root
*root
,
3086 struct btrfs_ordered_sum
*sums
);
3087 int btrfs_csum_one_bio(struct inode
*inode
, struct bio
*bio
,
3088 u64 file_start
, int contig
);
3089 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3090 struct list_head
*list
, int search_commit
);
3091 void btrfs_extent_item_to_extent_map(struct btrfs_inode
*inode
,
3092 const struct btrfs_path
*path
,
3093 struct btrfs_file_extent_item
*fi
,
3094 const bool new_inline
,
3095 struct extent_map
*em
);
3098 struct btrfs_delalloc_work
{
3099 struct inode
*inode
;
3101 struct completion completion
;
3102 struct list_head list
;
3103 struct btrfs_work work
;
3106 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3108 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3110 struct extent_map
*btrfs_get_extent_fiemap(struct btrfs_inode
*inode
,
3111 struct page
*page
, size_t pg_offset
, u64 start
,
3112 u64 len
, int create
);
3113 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3114 u64
*orig_start
, u64
*orig_block_len
,
3117 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3118 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3119 #define ClearPageChecked ClearPageFsMisc
3120 #define SetPageChecked SetPageFsMisc
3121 #define PageChecked PageFsMisc
3124 /* This forces readahead on a given range of bytes in an inode */
3125 static inline void btrfs_force_ra(struct address_space
*mapping
,
3126 struct file_ra_state
*ra
, struct file
*file
,
3127 pgoff_t offset
, unsigned long req_size
)
3129 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3132 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3133 int btrfs_set_inode_index(struct btrfs_inode
*dir
, u64
*index
);
3134 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3135 struct btrfs_root
*root
,
3136 struct btrfs_inode
*dir
, struct btrfs_inode
*inode
,
3137 const char *name
, int name_len
);
3138 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3139 struct btrfs_inode
*parent_inode
, struct btrfs_inode
*inode
,
3140 const char *name
, int name_len
, int add_backref
, u64 index
);
3141 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3142 struct btrfs_root
*root
,
3143 struct inode
*dir
, u64 objectid
,
3144 const char *name
, int name_len
);
3145 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3147 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3148 struct btrfs_root
*root
,
3149 struct inode
*inode
, u64 new_size
,
3152 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3153 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3155 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3156 struct extent_state
**cached_state
, int dedupe
);
3157 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3158 struct btrfs_root
*new_root
,
3159 struct btrfs_root
*parent_root
,
3161 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3162 size_t size
, struct bio
*bio
,
3163 unsigned long bio_flags
);
3164 int btrfs_page_mkwrite(struct vm_fault
*vmf
);
3165 int btrfs_readpage(struct file
*file
, struct page
*page
);
3166 void btrfs_evict_inode(struct inode
*inode
);
3167 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3168 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3169 void btrfs_destroy_inode(struct inode
*inode
);
3170 int btrfs_drop_inode(struct inode
*inode
);
3171 int btrfs_init_cachep(void);
3172 void btrfs_destroy_cachep(void);
3173 long btrfs_ioctl_trans_end(struct file
*file
);
3174 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3175 struct btrfs_root
*root
, int *was_new
);
3176 struct extent_map
*btrfs_get_extent(struct btrfs_inode
*inode
,
3177 struct page
*page
, size_t pg_offset
,
3178 u64 start
, u64 end
, int create
);
3179 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3180 struct btrfs_root
*root
,
3181 struct inode
*inode
);
3182 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3183 struct btrfs_root
*root
, struct inode
*inode
);
3184 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
,
3185 struct btrfs_inode
*inode
);
3186 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3187 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3188 struct btrfs_root
*root
);
3189 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3190 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3191 void btrfs_add_delayed_iput(struct inode
*inode
);
3192 void btrfs_run_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3193 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3194 u64 start
, u64 num_bytes
, u64 min_size
,
3195 loff_t actual_len
, u64
*alloc_hint
);
3196 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3197 struct btrfs_trans_handle
*trans
, int mode
,
3198 u64 start
, u64 num_bytes
, u64 min_size
,
3199 loff_t actual_len
, u64
*alloc_hint
);
3200 extern const struct dentry_operations btrfs_dentry_operations
;
3201 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3202 void btrfs_test_inode_set_ops(struct inode
*inode
);
3206 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3207 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3208 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3209 void btrfs_update_iflags(struct inode
*inode
);
3210 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3211 int btrfs_is_empty_uuid(u8
*uuid
);
3212 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3213 struct btrfs_ioctl_defrag_range_args
*range
,
3214 u64 newer_than
, unsigned long max_pages
);
3215 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3216 struct btrfs_ioctl_space_info
*space
);
3217 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3218 struct btrfs_ioctl_balance_args
*bargs
);
3219 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
3220 struct file
*dst_file
, u64 dst_loff
);
3223 int btrfs_auto_defrag_init(void);
3224 void btrfs_auto_defrag_exit(void);
3225 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3226 struct btrfs_inode
*inode
);
3227 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3228 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3229 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3230 void btrfs_drop_extent_cache(struct btrfs_inode
*inode
, u64 start
, u64 end
,
3232 extern const struct file_operations btrfs_file_operations
;
3233 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3234 struct btrfs_root
*root
, struct inode
*inode
,
3235 struct btrfs_path
*path
, u64 start
, u64 end
,
3236 u64
*drop_end
, int drop_cache
,
3238 u32 extent_item_size
,
3240 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3241 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3242 u64 end
, int drop_cache
);
3243 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3244 struct btrfs_inode
*inode
, u64 start
, u64 end
);
3245 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3246 int btrfs_dirty_pages(struct inode
*inode
, struct page
**pages
,
3247 size_t num_pages
, loff_t pos
, size_t write_bytes
,
3248 struct extent_state
**cached
);
3249 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3250 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
3251 struct file
*file_out
, loff_t pos_out
, u64 len
);
3254 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3255 struct btrfs_root
*root
);
3258 int btrfs_init_sysfs(void);
3259 void btrfs_exit_sysfs(void);
3260 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3261 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3264 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3267 int btrfs_parse_options(struct btrfs_fs_info
*info
, char *options
,
3268 unsigned long new_flags
);
3269 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3271 static inline __printf(2, 3)
3272 void btrfs_no_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3276 #ifdef CONFIG_PRINTK
3278 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3280 #define btrfs_printk(fs_info, fmt, args...) \
3281 btrfs_no_printk(fs_info, fmt, ##args)
3284 #define btrfs_emerg(fs_info, fmt, args...) \
3285 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3286 #define btrfs_alert(fs_info, fmt, args...) \
3287 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3288 #define btrfs_crit(fs_info, fmt, args...) \
3289 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3290 #define btrfs_err(fs_info, fmt, args...) \
3291 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3292 #define btrfs_warn(fs_info, fmt, args...) \
3293 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3294 #define btrfs_notice(fs_info, fmt, args...) \
3295 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3296 #define btrfs_info(fs_info, fmt, args...) \
3297 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3300 * Wrappers that use printk_in_rcu
3302 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3303 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3304 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3305 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3306 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3307 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3308 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3309 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3310 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3311 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3312 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3313 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3314 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3315 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3318 * Wrappers that use a ratelimited printk_in_rcu
3320 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3321 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3322 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3323 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3324 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3325 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3326 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3327 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3328 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3329 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3330 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3331 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3332 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3333 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3336 * Wrappers that use a ratelimited printk
3338 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3339 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3340 #define btrfs_alert_rl(fs_info, fmt, args...) \
3341 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3342 #define btrfs_crit_rl(fs_info, fmt, args...) \
3343 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3344 #define btrfs_err_rl(fs_info, fmt, args...) \
3345 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3346 #define btrfs_warn_rl(fs_info, fmt, args...) \
3347 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3348 #define btrfs_notice_rl(fs_info, fmt, args...) \
3349 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3350 #define btrfs_info_rl(fs_info, fmt, args...) \
3351 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3353 #if defined(CONFIG_DYNAMIC_DEBUG)
3354 #define btrfs_debug(fs_info, fmt, args...) \
3356 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3357 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3358 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3360 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3362 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3363 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3364 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3366 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3368 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3369 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3370 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3373 #define btrfs_debug_rl(fs_info, fmt, args...) \
3375 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3376 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3377 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3380 #elif defined(DEBUG)
3381 #define btrfs_debug(fs_info, fmt, args...) \
3382 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3383 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3384 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3385 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3386 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3387 #define btrfs_debug_rl(fs_info, fmt, args...) \
3388 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3390 #define btrfs_debug(fs_info, fmt, args...) \
3391 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3392 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3393 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3394 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3395 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3396 #define btrfs_debug_rl(fs_info, fmt, args...) \
3397 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3400 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3403 btrfs_printk(fs_info, fmt, ##args); \
3404 rcu_read_unlock(); \
3407 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3409 static DEFINE_RATELIMIT_STATE(_rs, \
3410 DEFAULT_RATELIMIT_INTERVAL, \
3411 DEFAULT_RATELIMIT_BURST); \
3412 if (__ratelimit(&_rs)) \
3413 btrfs_printk(fs_info, fmt, ##args); \
3416 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3419 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3420 rcu_read_unlock(); \
3423 #ifdef CONFIG_BTRFS_ASSERT
3426 static inline void assfail(char *expr
, char *file
, int line
)
3428 pr_err("assertion failed: %s, file: %s, line: %d\n",
3433 #define ASSERT(expr) \
3434 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3436 #define ASSERT(expr) ((void)0)
3441 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3442 unsigned int line
, int errno
, const char *fmt
, ...);
3444 const char *btrfs_decode_error(int errno
);
3447 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3448 const char *function
,
3449 unsigned int line
, int errno
);
3452 * Call btrfs_abort_transaction as early as possible when an error condition is
3453 * detected, that way the exact line number is reported.
3455 #define btrfs_abort_transaction(trans, errno) \
3457 /* Report first abort since mount */ \
3458 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3459 &((trans)->fs_info->fs_state))) { \
3460 if ((errno) != -EIO) { \
3461 WARN(1, KERN_DEBUG \
3462 "BTRFS: Transaction aborted (error %d)\n", \
3465 btrfs_debug((trans)->fs_info, \
3466 "Transaction aborted (error %d)", \
3470 __btrfs_abort_transaction((trans), __func__, \
3471 __LINE__, (errno)); \
3474 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3476 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3477 (errno), fmt, ##args); \
3482 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3483 unsigned int line
, int errno
, const char *fmt
, ...);
3485 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3486 * will panic(). Otherwise we BUG() here.
3488 #define btrfs_panic(fs_info, errno, fmt, args...) \
3490 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3495 /* compatibility and incompatibility defines */
3497 #define btrfs_set_fs_incompat(__fs_info, opt) \
3498 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3500 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3503 struct btrfs_super_block
*disk_super
;
3506 disk_super
= fs_info
->super_copy
;
3507 features
= btrfs_super_incompat_flags(disk_super
);
3508 if (!(features
& flag
)) {
3509 spin_lock(&fs_info
->super_lock
);
3510 features
= btrfs_super_incompat_flags(disk_super
);
3511 if (!(features
& flag
)) {
3513 btrfs_set_super_incompat_flags(disk_super
, features
);
3514 btrfs_info(fs_info
, "setting %llu feature flag",
3517 spin_unlock(&fs_info
->super_lock
);
3521 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3522 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3524 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3527 struct btrfs_super_block
*disk_super
;
3530 disk_super
= fs_info
->super_copy
;
3531 features
= btrfs_super_incompat_flags(disk_super
);
3532 if (features
& flag
) {
3533 spin_lock(&fs_info
->super_lock
);
3534 features
= btrfs_super_incompat_flags(disk_super
);
3535 if (features
& flag
) {
3537 btrfs_set_super_incompat_flags(disk_super
, features
);
3538 btrfs_info(fs_info
, "clearing %llu feature flag",
3541 spin_unlock(&fs_info
->super_lock
);
3545 #define btrfs_fs_incompat(fs_info, opt) \
3546 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3548 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3550 struct btrfs_super_block
*disk_super
;
3551 disk_super
= fs_info
->super_copy
;
3552 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3555 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3556 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3558 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3561 struct btrfs_super_block
*disk_super
;
3564 disk_super
= fs_info
->super_copy
;
3565 features
= btrfs_super_compat_ro_flags(disk_super
);
3566 if (!(features
& flag
)) {
3567 spin_lock(&fs_info
->super_lock
);
3568 features
= btrfs_super_compat_ro_flags(disk_super
);
3569 if (!(features
& flag
)) {
3571 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3572 btrfs_info(fs_info
, "setting %llu ro feature flag",
3575 spin_unlock(&fs_info
->super_lock
);
3579 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3580 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3582 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3585 struct btrfs_super_block
*disk_super
;
3588 disk_super
= fs_info
->super_copy
;
3589 features
= btrfs_super_compat_ro_flags(disk_super
);
3590 if (features
& flag
) {
3591 spin_lock(&fs_info
->super_lock
);
3592 features
= btrfs_super_compat_ro_flags(disk_super
);
3593 if (features
& flag
) {
3595 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3596 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3599 spin_unlock(&fs_info
->super_lock
);
3603 #define btrfs_fs_compat_ro(fs_info, opt) \
3604 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3606 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3608 struct btrfs_super_block
*disk_super
;
3609 disk_super
= fs_info
->super_copy
;
3610 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3614 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3615 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3616 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3617 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3618 struct inode
*inode
, struct inode
*dir
);
3620 #define btrfs_get_acl NULL
3621 #define btrfs_set_acl NULL
3622 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3623 struct inode
*inode
, struct inode
*dir
)
3630 int btrfs_relocate_block_group(struct btrfs_fs_info
*fs_info
, u64 group_start
);
3631 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3632 struct btrfs_root
*root
);
3633 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3634 struct btrfs_root
*root
);
3635 int btrfs_recover_relocation(struct btrfs_root
*root
);
3636 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3637 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3638 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3639 struct extent_buffer
*cow
);
3640 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3641 u64
*bytes_to_reserve
);
3642 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3643 struct btrfs_pending_snapshot
*pending
);
3646 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3647 u64 end
, struct btrfs_scrub_progress
*progress
,
3648 int readonly
, int is_dev_replace
);
3649 void btrfs_scrub_pause(struct btrfs_fs_info
*fs_info
);
3650 void btrfs_scrub_continue(struct btrfs_fs_info
*fs_info
);
3651 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3652 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3653 struct btrfs_device
*dev
);
3654 int btrfs_scrub_progress(struct btrfs_fs_info
*fs_info
, u64 devid
,
3655 struct btrfs_scrub_progress
*progress
);
3658 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3659 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3660 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3662 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3664 btrfs_bio_counter_sub(fs_info
, 1);
3668 struct reada_control
{
3669 struct btrfs_fs_info
*fs_info
; /* tree to prefetch */
3670 struct btrfs_key key_start
;
3671 struct btrfs_key key_end
; /* exclusive */
3674 wait_queue_head_t wait
;
3676 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3677 struct btrfs_key
*start
, struct btrfs_key
*end
);
3678 int btrfs_reada_wait(void *handle
);
3679 void btrfs_reada_detach(void *handle
);
3680 int btree_readahead_hook(struct extent_buffer
*eb
, int err
);
3682 static inline int is_fstree(u64 rootid
)
3684 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3685 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3686 !btrfs_qgroup_level(rootid
)))
3691 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3693 return signal_pending(current
);
3696 /* Sanity test specific functions */
3697 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3698 void btrfs_test_destroy_inode(struct inode
*inode
);
3701 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3703 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3704 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
,
3705 &fs_info
->fs_state
)))