2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include <linux/btrfs_tree.h>
37 #include <linux/workqueue.h>
38 #include <linux/security.h>
39 #include <linux/sizes.h>
40 #include <linux/dynamic_debug.h>
41 #include "extent_io.h"
42 #include "extent_map.h"
43 #include "async-thread.h"
45 struct btrfs_trans_handle
;
46 struct btrfs_transaction
;
47 struct btrfs_pending_snapshot
;
48 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
49 extern struct kmem_cache
*btrfs_transaction_cachep
;
50 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
51 extern struct kmem_cache
*btrfs_path_cachep
;
52 extern struct kmem_cache
*btrfs_free_space_cachep
;
53 struct btrfs_ordered_sum
;
55 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
56 #define STATIC noinline
58 #define STATIC static noinline
61 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
63 #define BTRFS_MAX_MIRRORS 3
65 #define BTRFS_MAX_LEVEL 8
67 #define BTRFS_COMPAT_EXTENT_TREE_V0
70 * the max metadata block size. This limit is somewhat artificial,
71 * but the memmove costs go through the roof for larger blocks.
73 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
76 * we can actually store much bigger names, but lets not confuse the rest
79 #define BTRFS_NAME_LEN 255
82 * Theoretical limit is larger, but we keep this down to a sane
83 * value. That should limit greatly the possibility of collisions on
86 #define BTRFS_LINK_MAX 65535U
88 static const int btrfs_csum_sizes
[] = { 4 };
90 /* four bytes for CRC32 */
91 #define BTRFS_EMPTY_DIR_SIZE 0
93 /* specific to btrfs_map_block(), therefore not in include/linux/blk_types.h */
94 #define REQ_GET_READ_MIRRORS (1 << 30)
96 /* ioprio of readahead is set to idle */
97 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
99 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
101 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
103 struct btrfs_mapping_tree
{
104 struct extent_map_tree map_tree
;
107 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
109 BUG_ON(num_stripes
== 0);
110 return sizeof(struct btrfs_chunk
) +
111 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
117 #define BTRFS_FS_STATE_ERROR 0
118 #define BTRFS_FS_STATE_REMOUNTING 1
119 #define BTRFS_FS_STATE_TRANS_ABORTED 2
120 #define BTRFS_FS_STATE_DEV_REPLACING 3
121 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
123 #define BTRFS_BACKREF_REV_MAX 256
124 #define BTRFS_BACKREF_REV_SHIFT 56
125 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
126 BTRFS_BACKREF_REV_SHIFT)
128 #define BTRFS_OLD_BACKREF_REV 0
129 #define BTRFS_MIXED_BACKREF_REV 1
132 * every tree block (leaf or node) starts with this header.
134 struct btrfs_header
{
135 /* these first four must match the super block */
136 u8 csum
[BTRFS_CSUM_SIZE
];
137 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
138 __le64 bytenr
; /* which block this node is supposed to live in */
141 /* allowed to be different from the super from here on down */
142 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
147 } __attribute__ ((__packed__
));
150 * this is a very generous portion of the super block, giving us
151 * room to translate 14 chunks with 3 stripes each.
153 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
156 * just in case we somehow lose the roots and are not able to mount,
157 * we store an array of the roots from previous transactions
160 #define BTRFS_NUM_BACKUP_ROOTS 4
161 struct btrfs_root_backup
{
163 __le64 tree_root_gen
;
166 __le64 chunk_root_gen
;
169 __le64 extent_root_gen
;
178 __le64 csum_root_gen
;
188 u8 extent_root_level
;
192 /* future and to align */
194 } __attribute__ ((__packed__
));
197 * the super block basically lists the main trees of the FS
198 * it currently lacks any block count etc etc
200 struct btrfs_super_block
{
201 u8 csum
[BTRFS_CSUM_SIZE
];
202 /* the first 4 fields must match struct btrfs_header */
203 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
204 __le64 bytenr
; /* this block number */
207 /* allowed to be different from the btrfs_header from here own down */
214 /* this will help find the new super based on the log root */
215 __le64 log_root_transid
;
218 __le64 root_dir_objectid
;
222 __le32 __unused_leafsize
;
224 __le32 sys_chunk_array_size
;
225 __le64 chunk_root_generation
;
227 __le64 compat_ro_flags
;
228 __le64 incompat_flags
;
233 struct btrfs_dev_item dev_item
;
235 char label
[BTRFS_LABEL_SIZE
];
237 __le64 cache_generation
;
238 __le64 uuid_tree_generation
;
240 /* future expansion */
242 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
243 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
244 } __attribute__ ((__packed__
));
247 * Compat flags that we support. If any incompat flags are set other than the
248 * ones specified below then we will fail to mount
250 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
251 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
252 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
254 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
255 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
257 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
258 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
260 #define BTRFS_FEATURE_INCOMPAT_SUPP \
261 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
262 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
263 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
264 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
265 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
266 BTRFS_FEATURE_INCOMPAT_RAID56 | \
267 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
268 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
269 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
271 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
272 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
273 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
276 * A leaf is full of items. offset and size tell us where to find
277 * the item in the leaf (relative to the start of the data area)
280 struct btrfs_disk_key key
;
283 } __attribute__ ((__packed__
));
286 * leaves have an item area and a data area:
287 * [item0, item1....itemN] [free space] [dataN...data1, data0]
289 * The data is separate from the items to get the keys closer together
293 struct btrfs_header header
;
294 struct btrfs_item items
[];
295 } __attribute__ ((__packed__
));
298 * all non-leaf blocks are nodes, they hold only keys and pointers to
301 struct btrfs_key_ptr
{
302 struct btrfs_disk_key key
;
305 } __attribute__ ((__packed__
));
308 struct btrfs_header header
;
309 struct btrfs_key_ptr ptrs
[];
310 } __attribute__ ((__packed__
));
313 * btrfs_paths remember the path taken from the root down to the leaf.
314 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
315 * to any other levels that are present.
317 * The slots array records the index of the item or block pointer
318 * used while walking the tree.
320 enum { READA_NONE
= 0, READA_BACK
, READA_FORWARD
};
322 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
323 int slots
[BTRFS_MAX_LEVEL
];
324 /* if there is real range locking, this locks field will change */
325 u8 locks
[BTRFS_MAX_LEVEL
];
327 /* keep some upper locks as we walk down */
331 * set by btrfs_split_item, tells search_slot to keep all locks
332 * and to force calls to keep space in the nodes
334 unsigned int search_for_split
:1;
335 unsigned int keep_locks
:1;
336 unsigned int skip_locking
:1;
337 unsigned int leave_spinning
:1;
338 unsigned int search_commit_root
:1;
339 unsigned int need_commit_sem
:1;
340 unsigned int skip_release_on_error
:1;
342 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
343 sizeof(struct btrfs_item))
344 struct btrfs_dev_replace
{
345 u64 replace_state
; /* see #define above */
346 u64 time_started
; /* seconds since 1-Jan-1970 */
347 u64 time_stopped
; /* seconds since 1-Jan-1970 */
348 atomic64_t num_write_errors
;
349 atomic64_t num_uncorrectable_read_errors
;
352 u64 committed_cursor_left
;
353 u64 cursor_left_last_write_of_item
;
356 u64 cont_reading_from_srcdev_mode
; /* see #define above */
359 int item_needs_writeback
;
360 struct btrfs_device
*srcdev
;
361 struct btrfs_device
*tgtdev
;
364 atomic_t nesting_level
;
365 struct mutex lock_finishing_cancel_unmount
;
368 atomic_t blocking_readers
;
369 wait_queue_head_t read_lock_wq
;
371 struct btrfs_scrub_progress scrub_progress
;
374 /* For raid type sysfs entries */
375 struct raid_kobject
{
380 struct btrfs_space_info
{
383 u64 total_bytes
; /* total bytes in the space,
384 this doesn't take mirrors into account */
385 u64 bytes_used
; /* total bytes used,
386 this doesn't take mirrors into account */
387 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
388 transaction finishes */
389 u64 bytes_reserved
; /* total bytes the allocator has reserved for
390 current allocations */
391 u64 bytes_may_use
; /* number of bytes that may be used for
392 delalloc/allocations */
393 u64 bytes_readonly
; /* total bytes that are read only */
395 u64 max_extent_size
; /* This will hold the maximum extent size of
396 the space info if we had an ENOSPC in the
399 unsigned int full
:1; /* indicates that we cannot allocate any more
400 chunks for this space */
401 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
403 unsigned int flush
:1; /* set if we are trying to make space */
405 unsigned int force_alloc
; /* set if we need to force a chunk
406 alloc for this space */
408 u64 disk_used
; /* total bytes used on disk */
409 u64 disk_total
; /* total bytes on disk, takes mirrors into
415 * bytes_pinned is kept in line with what is actually pinned, as in
416 * we've called update_block_group and dropped the bytes_used counter
417 * and increased the bytes_pinned counter. However this means that
418 * bytes_pinned does not reflect the bytes that will be pinned once the
419 * delayed refs are flushed, so this counter is inc'ed every time we
420 * call btrfs_free_extent so it is a realtime count of what will be
421 * freed once the transaction is committed. It will be zeroed every
422 * time the transaction commits.
424 struct percpu_counter total_bytes_pinned
;
426 struct list_head list
;
427 /* Protected by the spinlock 'lock'. */
428 struct list_head ro_bgs
;
429 struct list_head priority_tickets
;
430 struct list_head tickets
;
433 struct rw_semaphore groups_sem
;
434 /* for block groups in our same type */
435 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
436 wait_queue_head_t wait
;
439 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
442 #define BTRFS_BLOCK_RSV_GLOBAL 1
443 #define BTRFS_BLOCK_RSV_DELALLOC 2
444 #define BTRFS_BLOCK_RSV_TRANS 3
445 #define BTRFS_BLOCK_RSV_CHUNK 4
446 #define BTRFS_BLOCK_RSV_DELOPS 5
447 #define BTRFS_BLOCK_RSV_EMPTY 6
448 #define BTRFS_BLOCK_RSV_TEMP 7
450 struct btrfs_block_rsv
{
453 struct btrfs_space_info
*space_info
;
457 unsigned short failfast
;
461 * free clusters are used to claim free space in relatively large chunks,
462 * allowing us to do less seeky writes. They are used for all metadata
463 * allocations and data allocations in ssd mode.
465 struct btrfs_free_cluster
{
467 spinlock_t refill_lock
;
470 /* largest extent in this cluster */
473 /* first extent starting offset */
476 /* We did a full search and couldn't create a cluster */
479 struct btrfs_block_group_cache
*block_group
;
481 * when a cluster is allocated from a block group, we put the
482 * cluster onto a list in the block group so that it can
483 * be freed before the block group is freed.
485 struct list_head block_group_list
;
488 enum btrfs_caching_type
{
490 BTRFS_CACHE_STARTED
= 1,
491 BTRFS_CACHE_FAST
= 2,
492 BTRFS_CACHE_FINISHED
= 3,
493 BTRFS_CACHE_ERROR
= 4,
496 enum btrfs_disk_cache_state
{
497 BTRFS_DC_WRITTEN
= 0,
503 struct btrfs_caching_control
{
504 struct list_head list
;
506 wait_queue_head_t wait
;
507 struct btrfs_work work
;
508 struct btrfs_block_group_cache
*block_group
;
513 /* Once caching_thread() finds this much free space, it will wake up waiters. */
514 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
516 struct btrfs_io_ctl
{
520 struct btrfs_root
*root
;
527 unsigned check_crcs
:1;
530 struct btrfs_block_group_cache
{
531 struct btrfs_key key
;
532 struct btrfs_block_group_item item
;
533 struct btrfs_fs_info
*fs_info
;
541 u64 cache_generation
;
545 * If the free space extent count exceeds this number, convert the block
548 u32 bitmap_high_thresh
;
551 * If the free space extent count drops below this number, convert the
552 * block group back to extents.
554 u32 bitmap_low_thresh
;
557 * It is just used for the delayed data space allocation because
558 * only the data space allocation and the relative metadata update
559 * can be done cross the transaction.
561 struct rw_semaphore data_rwsem
;
563 /* for raid56, this is a full stripe, without parity */
564 unsigned long full_stripe_len
;
568 unsigned int has_caching_ctl
:1;
569 unsigned int removed
:1;
571 int disk_cache_state
;
573 /* cache tracking stuff */
575 struct btrfs_caching_control
*caching_ctl
;
576 u64 last_byte_to_unpin
;
578 struct btrfs_space_info
*space_info
;
580 /* free space cache stuff */
581 struct btrfs_free_space_ctl
*free_space_ctl
;
583 /* block group cache stuff */
584 struct rb_node cache_node
;
586 /* for block groups in the same raid type */
587 struct list_head list
;
592 /* List of struct btrfs_free_clusters for this block group.
593 * Today it will only have one thing on it, but that may change
595 struct list_head cluster_list
;
597 /* For delayed block group creation or deletion of empty block groups */
598 struct list_head bg_list
;
600 /* For read-only block groups */
601 struct list_head ro_list
;
605 /* For dirty block groups */
606 struct list_head dirty_list
;
607 struct list_head io_list
;
609 struct btrfs_io_ctl io_ctl
;
612 * Incremented when doing extent allocations and holding a read lock
613 * on the space_info's groups_sem semaphore.
614 * Decremented when an ordered extent that represents an IO against this
615 * block group's range is created (after it's added to its inode's
616 * root's list of ordered extents) or immediately after the allocation
617 * if it's a metadata extent or fallocate extent (for these cases we
618 * don't create ordered extents).
620 atomic_t reservations
;
623 * Incremented while holding the spinlock *lock* by a task checking if
624 * it can perform a nocow write (incremented if the value for the *ro*
625 * field is 0). Decremented by such tasks once they create an ordered
626 * extent or before that if some error happens before reaching that step.
627 * This is to prevent races between block group relocation and nocow
628 * writes through direct IO.
630 atomic_t nocow_writers
;
632 /* Lock for free space tree operations. */
633 struct mutex free_space_lock
;
636 * Does the block group need to be added to the free space tree?
637 * Protected by free_space_lock.
639 int needs_free_space
;
642 /* delayed seq elem */
644 struct list_head list
;
648 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
650 enum btrfs_orphan_cleanup_state
{
651 ORPHAN_CLEANUP_STARTED
= 1,
652 ORPHAN_CLEANUP_DONE
= 2,
655 /* used by the raid56 code to lock stripes for read/modify/write */
656 struct btrfs_stripe_hash
{
657 struct list_head hash_list
;
658 wait_queue_head_t wait
;
662 /* used by the raid56 code to lock stripes for read/modify/write */
663 struct btrfs_stripe_hash_table
{
664 struct list_head stripe_cache
;
665 spinlock_t cache_lock
;
667 struct btrfs_stripe_hash table
[];
670 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
672 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
675 struct reloc_control
;
677 struct btrfs_fs_devices
;
678 struct btrfs_balance_control
;
679 struct btrfs_delayed_root
;
681 #define BTRFS_FS_BARRIER 1
682 #define BTRFS_FS_CLOSING_START 2
683 #define BTRFS_FS_CLOSING_DONE 3
684 #define BTRFS_FS_LOG_RECOVERING 4
685 #define BTRFS_FS_OPEN 5
686 #define BTRFS_FS_QUOTA_ENABLED 6
687 #define BTRFS_FS_QUOTA_ENABLING 7
688 #define BTRFS_FS_QUOTA_DISABLING 8
689 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
690 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
691 #define BTRFS_FS_BTREE_ERR 11
692 #define BTRFS_FS_LOG1_ERR 12
693 #define BTRFS_FS_LOG2_ERR 13
695 struct btrfs_fs_info
{
696 u8 fsid
[BTRFS_FSID_SIZE
];
697 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
699 struct btrfs_root
*extent_root
;
700 struct btrfs_root
*tree_root
;
701 struct btrfs_root
*chunk_root
;
702 struct btrfs_root
*dev_root
;
703 struct btrfs_root
*fs_root
;
704 struct btrfs_root
*csum_root
;
705 struct btrfs_root
*quota_root
;
706 struct btrfs_root
*uuid_root
;
707 struct btrfs_root
*free_space_root
;
709 /* the log root tree is a directory of all the other log roots */
710 struct btrfs_root
*log_root_tree
;
712 spinlock_t fs_roots_radix_lock
;
713 struct radix_tree_root fs_roots_radix
;
715 /* block group cache stuff */
716 spinlock_t block_group_cache_lock
;
717 u64 first_logical_byte
;
718 struct rb_root block_group_cache_tree
;
720 /* keep track of unallocated space */
721 spinlock_t free_chunk_lock
;
722 u64 free_chunk_space
;
724 struct extent_io_tree freed_extents
[2];
725 struct extent_io_tree
*pinned_extents
;
727 /* logical->physical extent mapping */
728 struct btrfs_mapping_tree mapping_tree
;
731 * block reservation for extent, checksum, root tree and
732 * delayed dir index item
734 struct btrfs_block_rsv global_block_rsv
;
735 /* block reservation for delay allocation */
736 struct btrfs_block_rsv delalloc_block_rsv
;
737 /* block reservation for metadata operations */
738 struct btrfs_block_rsv trans_block_rsv
;
739 /* block reservation for chunk tree */
740 struct btrfs_block_rsv chunk_block_rsv
;
741 /* block reservation for delayed operations */
742 struct btrfs_block_rsv delayed_block_rsv
;
744 struct btrfs_block_rsv empty_block_rsv
;
747 u64 last_trans_committed
;
748 u64 avg_delayed_ref_runtime
;
751 * this is updated to the current trans every time a full commit
752 * is required instead of the faster short fsync log commits
754 u64 last_trans_log_full_commit
;
755 unsigned long mount_opt
;
757 * Track requests for actions that need to be done during transaction
758 * commit (like for some mount options).
760 unsigned long pending_changes
;
761 unsigned long compress_type
:4;
764 * It is a suggestive number, the read side is safe even it gets a
765 * wrong number because we will write out the data into a regular
766 * extent. The write side(mount/remount) is under ->s_umount lock,
767 * so it is also safe.
771 * Protected by ->chunk_mutex and sb->s_umount.
773 * The reason that we use two lock to protect it is because only
774 * remount and mount operations can change it and these two operations
775 * are under sb->s_umount, but the read side (chunk allocation) can not
776 * acquire sb->s_umount or the deadlock would happen. So we use two
777 * locks to protect it. On the write side, we must acquire two locks,
778 * and on the read side, we just need acquire one of them.
781 struct btrfs_transaction
*running_transaction
;
782 wait_queue_head_t transaction_throttle
;
783 wait_queue_head_t transaction_wait
;
784 wait_queue_head_t transaction_blocked_wait
;
785 wait_queue_head_t async_submit_wait
;
788 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
789 * when they are updated.
791 * Because we do not clear the flags for ever, so we needn't use
792 * the lock on the read side.
794 * We also needn't use the lock when we mount the fs, because
795 * there is no other task which will update the flag.
797 spinlock_t super_lock
;
798 struct btrfs_super_block
*super_copy
;
799 struct btrfs_super_block
*super_for_commit
;
800 struct block_device
*__bdev
;
801 struct super_block
*sb
;
802 struct inode
*btree_inode
;
803 struct backing_dev_info bdi
;
804 struct mutex tree_log_mutex
;
805 struct mutex transaction_kthread_mutex
;
806 struct mutex cleaner_mutex
;
807 struct mutex chunk_mutex
;
808 struct mutex volume_mutex
;
809 struct rw_semaphore bg_delete_sem
;
812 * this is taken to make sure we don't set block groups ro after
813 * the free space cache has been allocated on them
815 struct mutex ro_block_group_mutex
;
817 /* this is used during read/modify/write to make sure
818 * no two ios are trying to mod the same stripe at the same
821 struct btrfs_stripe_hash_table
*stripe_hash_table
;
824 * this protects the ordered operations list only while we are
825 * processing all of the entries on it. This way we make
826 * sure the commit code doesn't find the list temporarily empty
827 * because another function happens to be doing non-waiting preflush
828 * before jumping into the main commit.
830 struct mutex ordered_operations_mutex
;
832 struct rw_semaphore commit_root_sem
;
834 struct rw_semaphore cleanup_work_sem
;
836 struct rw_semaphore subvol_sem
;
837 struct srcu_struct subvol_srcu
;
839 spinlock_t trans_lock
;
841 * the reloc mutex goes with the trans lock, it is taken
842 * during commit to protect us from the relocation code
844 struct mutex reloc_mutex
;
846 struct list_head trans_list
;
847 struct list_head dead_roots
;
848 struct list_head caching_block_groups
;
850 spinlock_t delayed_iput_lock
;
851 struct list_head delayed_iputs
;
852 struct mutex cleaner_delayed_iput_mutex
;
854 /* this protects tree_mod_seq_list */
855 spinlock_t tree_mod_seq_lock
;
856 atomic64_t tree_mod_seq
;
857 struct list_head tree_mod_seq_list
;
859 /* this protects tree_mod_log */
860 rwlock_t tree_mod_log_lock
;
861 struct rb_root tree_mod_log
;
863 atomic_t nr_async_submits
;
864 atomic_t async_submit_draining
;
865 atomic_t nr_async_bios
;
866 atomic_t async_delalloc_pages
;
867 atomic_t open_ioctl_trans
;
870 * this is used to protect the following list -- ordered_roots.
872 spinlock_t ordered_root_lock
;
875 * all fs/file tree roots in which there are data=ordered extents
876 * pending writeback are added into this list.
878 * these can span multiple transactions and basically include
879 * every dirty data page that isn't from nodatacow
881 struct list_head ordered_roots
;
883 struct mutex delalloc_root_mutex
;
884 spinlock_t delalloc_root_lock
;
885 /* all fs/file tree roots that have delalloc inodes. */
886 struct list_head delalloc_roots
;
889 * there is a pool of worker threads for checksumming during writes
890 * and a pool for checksumming after reads. This is because readers
891 * can run with FS locks held, and the writers may be waiting for
892 * those locks. We don't want ordering in the pending list to cause
893 * deadlocks, and so the two are serviced separately.
895 * A third pool does submit_bio to avoid deadlocking with the other
898 struct btrfs_workqueue
*workers
;
899 struct btrfs_workqueue
*delalloc_workers
;
900 struct btrfs_workqueue
*flush_workers
;
901 struct btrfs_workqueue
*endio_workers
;
902 struct btrfs_workqueue
*endio_meta_workers
;
903 struct btrfs_workqueue
*endio_raid56_workers
;
904 struct btrfs_workqueue
*endio_repair_workers
;
905 struct btrfs_workqueue
*rmw_workers
;
906 struct btrfs_workqueue
*endio_meta_write_workers
;
907 struct btrfs_workqueue
*endio_write_workers
;
908 struct btrfs_workqueue
*endio_freespace_worker
;
909 struct btrfs_workqueue
*submit_workers
;
910 struct btrfs_workqueue
*caching_workers
;
911 struct btrfs_workqueue
*readahead_workers
;
914 * fixup workers take dirty pages that didn't properly go through
915 * the cow mechanism and make them safe to write. It happens
916 * for the sys_munmap function call path
918 struct btrfs_workqueue
*fixup_workers
;
919 struct btrfs_workqueue
*delayed_workers
;
921 /* the extent workers do delayed refs on the extent allocation tree */
922 struct btrfs_workqueue
*extent_workers
;
923 struct task_struct
*transaction_kthread
;
924 struct task_struct
*cleaner_kthread
;
925 int thread_pool_size
;
927 struct kobject
*space_info_kobj
;
931 /* used to keep from writing metadata until there is a nice batch */
932 struct percpu_counter dirty_metadata_bytes
;
933 struct percpu_counter delalloc_bytes
;
934 s32 dirty_metadata_batch
;
937 struct list_head dirty_cowonly_roots
;
939 struct btrfs_fs_devices
*fs_devices
;
942 * the space_info list is almost entirely read only. It only changes
943 * when we add a new raid type to the FS, and that happens
944 * very rarely. RCU is used to protect it.
946 struct list_head space_info
;
948 struct btrfs_space_info
*data_sinfo
;
950 struct reloc_control
*reloc_ctl
;
952 /* data_alloc_cluster is only used in ssd mode */
953 struct btrfs_free_cluster data_alloc_cluster
;
955 /* all metadata allocations go through this cluster */
956 struct btrfs_free_cluster meta_alloc_cluster
;
958 /* auto defrag inodes go here */
959 spinlock_t defrag_inodes_lock
;
960 struct rb_root defrag_inodes
;
961 atomic_t defrag_running
;
963 /* Used to protect avail_{data, metadata, system}_alloc_bits */
964 seqlock_t profiles_lock
;
966 * these three are in extended format (availability of single
967 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
968 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
970 u64 avail_data_alloc_bits
;
971 u64 avail_metadata_alloc_bits
;
972 u64 avail_system_alloc_bits
;
974 /* restriper state */
975 spinlock_t balance_lock
;
976 struct mutex balance_mutex
;
977 atomic_t balance_running
;
978 atomic_t balance_pause_req
;
979 atomic_t balance_cancel_req
;
980 struct btrfs_balance_control
*balance_ctl
;
981 wait_queue_head_t balance_wait_q
;
983 unsigned data_chunk_allocations
;
984 unsigned metadata_ratio
;
988 /* private scrub information */
989 struct mutex scrub_lock
;
990 atomic_t scrubs_running
;
991 atomic_t scrub_pause_req
;
992 atomic_t scrubs_paused
;
993 atomic_t scrub_cancel_req
;
994 wait_queue_head_t scrub_pause_wait
;
995 int scrub_workers_refcnt
;
996 struct btrfs_workqueue
*scrub_workers
;
997 struct btrfs_workqueue
*scrub_wr_completion_workers
;
998 struct btrfs_workqueue
*scrub_nocow_workers
;
999 struct btrfs_workqueue
*scrub_parity_workers
;
1001 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1002 u32 check_integrity_print_mask
;
1004 /* is qgroup tracking in a consistent state? */
1007 /* holds configuration and tracking. Protected by qgroup_lock */
1008 struct rb_root qgroup_tree
;
1009 struct rb_root qgroup_op_tree
;
1010 spinlock_t qgroup_lock
;
1011 spinlock_t qgroup_op_lock
;
1012 atomic_t qgroup_op_seq
;
1015 * used to avoid frequently calling ulist_alloc()/ulist_free()
1016 * when doing qgroup accounting, it must be protected by qgroup_lock.
1018 struct ulist
*qgroup_ulist
;
1020 /* protect user change for quota operations */
1021 struct mutex qgroup_ioctl_lock
;
1023 /* list of dirty qgroups to be written at next commit */
1024 struct list_head dirty_qgroups
;
1026 /* used by qgroup for an efficient tree traversal */
1029 /* qgroup rescan items */
1030 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1031 struct btrfs_key qgroup_rescan_progress
;
1032 struct btrfs_workqueue
*qgroup_rescan_workers
;
1033 struct completion qgroup_rescan_completion
;
1034 struct btrfs_work qgroup_rescan_work
;
1035 bool qgroup_rescan_running
; /* protected by qgroup_rescan_lock */
1037 /* filesystem state */
1038 unsigned long fs_state
;
1040 struct btrfs_delayed_root
*delayed_root
;
1042 /* readahead tree */
1043 spinlock_t reada_lock
;
1044 struct radix_tree_root reada_tree
;
1046 /* readahead works cnt */
1047 atomic_t reada_works_cnt
;
1049 /* Extent buffer radix tree */
1050 spinlock_t buffer_lock
;
1051 struct radix_tree_root buffer_radix
;
1053 /* next backup root to be overwritten */
1054 int backup_root_index
;
1056 int num_tolerated_disk_barrier_failures
;
1058 /* device replace state */
1059 struct btrfs_dev_replace dev_replace
;
1061 atomic_t mutually_exclusive_operation_running
;
1063 struct percpu_counter bio_counter
;
1064 wait_queue_head_t replace_wait
;
1066 struct semaphore uuid_tree_rescan_sem
;
1068 /* Used to reclaim the metadata space in the background. */
1069 struct work_struct async_reclaim_work
;
1071 spinlock_t unused_bgs_lock
;
1072 struct list_head unused_bgs
;
1073 struct mutex unused_bg_unpin_mutex
;
1075 /* For btrfs to record security options */
1076 struct security_mnt_opts security_opts
;
1079 * Chunks that can't be freed yet (under a trim/discard operation)
1080 * and will be latter freed. Protected by fs_info->chunk_mutex.
1082 struct list_head pinned_chunks
;
1084 /* Used to record internally whether fs has been frozen */
1088 struct btrfs_subvolume_writers
{
1089 struct percpu_counter counter
;
1090 wait_queue_head_t wait
;
1094 * The state of btrfs root
1097 * btrfs_record_root_in_trans is a multi-step process,
1098 * and it can race with the balancing code. But the
1099 * race is very small, and only the first time the root
1100 * is added to each transaction. So IN_TRANS_SETUP
1101 * is used to tell us when more checks are required
1103 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1104 #define BTRFS_ROOT_REF_COWS 1
1105 #define BTRFS_ROOT_TRACK_DIRTY 2
1106 #define BTRFS_ROOT_IN_RADIX 3
1107 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1108 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1109 #define BTRFS_ROOT_FORCE_COW 6
1110 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1111 #define BTRFS_ROOT_DIRTY 8
1114 * in ram representation of the tree. extent_root is used for all allocations
1115 * and for the extent tree extent_root root.
1118 struct extent_buffer
*node
;
1120 struct extent_buffer
*commit_root
;
1121 struct btrfs_root
*log_root
;
1122 struct btrfs_root
*reloc_root
;
1124 unsigned long state
;
1125 struct btrfs_root_item root_item
;
1126 struct btrfs_key root_key
;
1127 struct btrfs_fs_info
*fs_info
;
1128 struct extent_io_tree dirty_log_pages
;
1130 struct mutex objectid_mutex
;
1132 spinlock_t accounting_lock
;
1133 struct btrfs_block_rsv
*block_rsv
;
1135 /* free ino cache stuff */
1136 struct btrfs_free_space_ctl
*free_ino_ctl
;
1137 enum btrfs_caching_type ino_cache_state
;
1138 spinlock_t ino_cache_lock
;
1139 wait_queue_head_t ino_cache_wait
;
1140 struct btrfs_free_space_ctl
*free_ino_pinned
;
1141 u64 ino_cache_progress
;
1142 struct inode
*ino_cache_inode
;
1144 struct mutex log_mutex
;
1145 wait_queue_head_t log_writer_wait
;
1146 wait_queue_head_t log_commit_wait
[2];
1147 struct list_head log_ctxs
[2];
1148 atomic_t log_writers
;
1149 atomic_t log_commit
[2];
1152 /* No matter the commit succeeds or not*/
1153 int log_transid_committed
;
1154 /* Just be updated when the commit succeeds. */
1155 int last_log_commit
;
1156 pid_t log_start_pid
;
1161 /* data allocations are done in sectorsize units */
1164 /* node allocations are done in nodesize units */
1171 u64 highest_objectid
;
1173 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1174 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1178 u64 defrag_trans_start
;
1179 struct btrfs_key defrag_progress
;
1180 struct btrfs_key defrag_max
;
1183 /* the dirty list is only used by non-reference counted roots */
1184 struct list_head dirty_list
;
1186 struct list_head root_list
;
1188 spinlock_t log_extents_lock
[2];
1189 struct list_head logged_list
[2];
1191 spinlock_t orphan_lock
;
1192 atomic_t orphan_inodes
;
1193 struct btrfs_block_rsv
*orphan_block_rsv
;
1194 int orphan_cleanup_state
;
1196 spinlock_t inode_lock
;
1197 /* red-black tree that keeps track of in-memory inodes */
1198 struct rb_root inode_tree
;
1201 * radix tree that keeps track of delayed nodes of every inode,
1202 * protected by inode_lock
1204 struct radix_tree_root delayed_nodes_tree
;
1206 * right now this just gets used so that a root has its own devid
1207 * for stat. It may be used for more later
1211 spinlock_t root_item_lock
;
1214 struct mutex delalloc_mutex
;
1215 spinlock_t delalloc_lock
;
1217 * all of the inodes that have delalloc bytes. It is possible for
1218 * this list to be empty even when there is still dirty data=ordered
1219 * extents waiting to finish IO.
1221 struct list_head delalloc_inodes
;
1222 struct list_head delalloc_root
;
1223 u64 nr_delalloc_inodes
;
1225 struct mutex ordered_extent_mutex
;
1227 * this is used by the balancing code to wait for all the pending
1230 spinlock_t ordered_extent_lock
;
1233 * all of the data=ordered extents pending writeback
1234 * these can span multiple transactions and basically include
1235 * every dirty data page that isn't from nodatacow
1237 struct list_head ordered_extents
;
1238 struct list_head ordered_root
;
1239 u64 nr_ordered_extents
;
1242 * Number of currently running SEND ioctls to prevent
1243 * manipulation with the read-only status via SUBVOL_SETFLAGS
1245 int send_in_progress
;
1246 struct btrfs_subvolume_writers
*subv_writers
;
1247 atomic_t will_be_snapshoted
;
1249 /* For qgroup metadata space reserve */
1250 atomic_t qgroup_meta_rsv
;
1253 static inline u32
__BTRFS_LEAF_DATA_SIZE(u32 blocksize
)
1255 return blocksize
- sizeof(struct btrfs_header
);
1258 static inline u32
BTRFS_LEAF_DATA_SIZE(const struct btrfs_root
*root
)
1260 return __BTRFS_LEAF_DATA_SIZE(root
->nodesize
);
1263 static inline u32
BTRFS_MAX_ITEM_SIZE(const struct btrfs_root
*root
)
1265 return BTRFS_LEAF_DATA_SIZE(root
) - sizeof(struct btrfs_item
);
1268 static inline u32
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_root
*root
)
1270 return BTRFS_LEAF_DATA_SIZE(root
) / sizeof(struct btrfs_key_ptr
);
1273 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1274 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1275 static inline u32
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_root
*root
)
1277 return BTRFS_MAX_ITEM_SIZE(root
) -
1278 BTRFS_FILE_EXTENT_INLINE_DATA_START
;
1281 static inline u32
BTRFS_MAX_XATTR_SIZE(const struct btrfs_root
*root
)
1283 return BTRFS_MAX_ITEM_SIZE(root
) - sizeof(struct btrfs_dir_item
);
1287 * Flags for mount options.
1289 * Note: don't forget to add new options to btrfs_show_options()
1291 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1292 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1293 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1294 #define BTRFS_MOUNT_SSD (1 << 3)
1295 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1296 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1297 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1298 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1299 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1300 #define BTRFS_MOUNT_NOSSD (1 << 9)
1301 #define BTRFS_MOUNT_DISCARD (1 << 10)
1302 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1303 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1304 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1305 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1306 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1307 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1308 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1309 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1310 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1311 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1312 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1313 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1314 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1315 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1316 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1317 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1318 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1320 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1321 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1323 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1324 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1325 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1326 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1329 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1331 if (!btrfs_test_opt(fs_info, opt)) \
1332 btrfs_info(fs_info, fmt, ##args); \
1333 btrfs_set_opt(fs_info->mount_opt, opt); \
1336 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1338 if (btrfs_test_opt(fs_info, opt)) \
1339 btrfs_info(fs_info, fmt, ##args); \
1340 btrfs_clear_opt(fs_info->mount_opt, opt); \
1343 #ifdef CONFIG_BTRFS_DEBUG
1345 btrfs_should_fragment_free_space(struct btrfs_root
*root
,
1346 struct btrfs_block_group_cache
*block_group
)
1348 return (btrfs_test_opt(root
->fs_info
, FRAGMENT_METADATA
) &&
1349 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1350 (btrfs_test_opt(root
->fs_info
, FRAGMENT_DATA
) &&
1351 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1356 * Requests for changes that need to be done during transaction commit.
1358 * Internal mount options that are used for special handling of the real
1359 * mount options (eg. cannot be set during remount and have to be set during
1360 * transaction commit)
1363 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1364 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1365 #define BTRFS_PENDING_COMMIT (2)
1367 #define btrfs_test_pending(info, opt) \
1368 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1369 #define btrfs_set_pending(info, opt) \
1370 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1371 #define btrfs_clear_pending(info, opt) \
1372 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1375 * Helpers for setting pending mount option changes.
1377 * Expects corresponding macros
1378 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1380 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1382 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1383 btrfs_info((info), fmt, ##args); \
1384 btrfs_set_pending((info), SET_##opt); \
1385 btrfs_clear_pending((info), CLEAR_##opt); \
1389 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1391 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1392 btrfs_info((info), fmt, ##args); \
1393 btrfs_set_pending((info), CLEAR_##opt); \
1394 btrfs_clear_pending((info), SET_##opt); \
1401 #define BTRFS_INODE_NODATASUM (1 << 0)
1402 #define BTRFS_INODE_NODATACOW (1 << 1)
1403 #define BTRFS_INODE_READONLY (1 << 2)
1404 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1405 #define BTRFS_INODE_PREALLOC (1 << 4)
1406 #define BTRFS_INODE_SYNC (1 << 5)
1407 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1408 #define BTRFS_INODE_APPEND (1 << 7)
1409 #define BTRFS_INODE_NODUMP (1 << 8)
1410 #define BTRFS_INODE_NOATIME (1 << 9)
1411 #define BTRFS_INODE_DIRSYNC (1 << 10)
1412 #define BTRFS_INODE_COMPRESS (1 << 11)
1414 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1416 struct btrfs_map_token
{
1417 struct extent_buffer
*eb
;
1419 unsigned long offset
;
1422 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1423 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1425 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1427 token
->kaddr
= NULL
;
1430 /* some macros to generate set/get functions for the struct fields. This
1431 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1434 #define le8_to_cpu(v) (v)
1435 #define cpu_to_le8(v) (v)
1438 #define read_eb_member(eb, ptr, type, member, result) ( \
1439 read_extent_buffer(eb, (char *)(result), \
1440 ((unsigned long)(ptr)) + \
1441 offsetof(type, member), \
1442 sizeof(((type *)0)->member)))
1444 #define write_eb_member(eb, ptr, type, member, result) ( \
1445 write_extent_buffer(eb, (char *)(result), \
1446 ((unsigned long)(ptr)) + \
1447 offsetof(type, member), \
1448 sizeof(((type *)0)->member)))
1450 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1451 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1452 unsigned long off, \
1453 struct btrfs_map_token *token); \
1454 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1455 unsigned long off, u##bits val, \
1456 struct btrfs_map_token *token); \
1457 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1458 unsigned long off) \
1460 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1462 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1463 unsigned long off, u##bits val) \
1465 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1468 DECLARE_BTRFS_SETGET_BITS(8)
1469 DECLARE_BTRFS_SETGET_BITS(16)
1470 DECLARE_BTRFS_SETGET_BITS(32)
1471 DECLARE_BTRFS_SETGET_BITS(64)
1473 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1474 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1476 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1477 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1479 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1482 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1483 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1485 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1486 struct btrfs_map_token *token) \
1488 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1489 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1491 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1492 type *s, u##bits val, \
1493 struct btrfs_map_token *token) \
1495 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1496 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1499 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1500 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1502 type *p = page_address(eb->pages[0]); \
1503 u##bits res = le##bits##_to_cpu(p->member); \
1506 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1509 type *p = page_address(eb->pages[0]); \
1510 p->member = cpu_to_le##bits(val); \
1513 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1514 static inline u##bits btrfs_##name(type *s) \
1516 return le##bits##_to_cpu(s->member); \
1518 static inline void btrfs_set_##name(type *s, u##bits val) \
1520 s->member = cpu_to_le##bits(val); \
1523 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1524 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1525 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1526 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1527 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1528 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1530 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1531 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1532 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1533 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1534 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1535 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1537 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1538 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1540 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1542 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1544 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1546 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1548 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1549 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1551 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1553 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1555 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1558 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1560 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1563 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1565 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1568 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1569 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1570 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1571 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1572 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1573 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1574 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1575 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1576 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1577 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1578 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1580 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1582 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1585 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1586 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1587 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1589 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1591 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1593 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1595 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1596 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1598 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1600 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1601 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1603 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1606 unsigned long offset
= (unsigned long)c
;
1607 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1608 offset
+= nr
* sizeof(struct btrfs_stripe
);
1609 return (struct btrfs_stripe
*)offset
;
1612 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1614 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1617 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1618 struct btrfs_chunk
*c
, int nr
)
1620 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1623 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1624 struct btrfs_chunk
*c
, int nr
)
1626 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1629 /* struct btrfs_block_group_item */
1630 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1632 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1634 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1635 struct btrfs_block_group_item
, chunk_objectid
, 64);
1637 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1638 struct btrfs_block_group_item
, chunk_objectid
, 64);
1639 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1640 struct btrfs_block_group_item
, flags
, 64);
1641 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1642 struct btrfs_block_group_item
, flags
, 64);
1644 /* struct btrfs_free_space_info */
1645 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1647 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1649 /* struct btrfs_inode_ref */
1650 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1651 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1653 /* struct btrfs_inode_extref */
1654 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1655 parent_objectid
, 64);
1656 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1658 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1660 /* struct btrfs_inode_item */
1661 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1662 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1663 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1664 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1665 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1666 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1667 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1668 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1669 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1670 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1671 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1672 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1673 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1675 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1677 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1679 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1680 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1682 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1684 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1685 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1686 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1687 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1688 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1689 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1690 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1691 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1692 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1693 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1695 /* struct btrfs_dev_extent */
1696 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1698 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1699 chunk_objectid
, 64);
1700 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1702 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1704 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1706 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1707 return (unsigned long)dev
+ ptr
;
1710 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1711 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1713 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1715 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1718 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1720 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1721 struct btrfs_tree_block_info
*item
,
1722 struct btrfs_disk_key
*key
)
1724 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1727 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1728 struct btrfs_tree_block_info
*item
,
1729 struct btrfs_disk_key
*key
)
1731 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1734 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1736 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1738 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1740 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1743 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1746 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1748 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1751 static inline u32
btrfs_extent_inline_ref_size(int type
)
1753 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1754 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1755 return sizeof(struct btrfs_extent_inline_ref
);
1756 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1757 return sizeof(struct btrfs_shared_data_ref
) +
1758 sizeof(struct btrfs_extent_inline_ref
);
1759 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1760 return sizeof(struct btrfs_extent_data_ref
) +
1761 offsetof(struct btrfs_extent_inline_ref
, offset
);
1766 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1767 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1769 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1770 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1772 /* struct btrfs_node */
1773 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1774 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1775 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1777 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1780 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1783 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1784 sizeof(struct btrfs_key_ptr
) * nr
;
1785 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1788 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1792 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1793 sizeof(struct btrfs_key_ptr
) * nr
;
1794 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1797 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1800 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1801 sizeof(struct btrfs_key_ptr
) * nr
;
1802 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1805 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1809 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1810 sizeof(struct btrfs_key_ptr
) * nr
;
1811 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1814 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1816 return offsetof(struct btrfs_node
, ptrs
) +
1817 sizeof(struct btrfs_key_ptr
) * nr
;
1820 void btrfs_node_key(struct extent_buffer
*eb
,
1821 struct btrfs_disk_key
*disk_key
, int nr
);
1823 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1824 struct btrfs_disk_key
*disk_key
, int nr
)
1827 ptr
= btrfs_node_key_ptr_offset(nr
);
1828 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1829 struct btrfs_key_ptr
, key
, disk_key
);
1832 /* struct btrfs_item */
1833 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1834 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1835 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1836 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1838 static inline unsigned long btrfs_item_nr_offset(int nr
)
1840 return offsetof(struct btrfs_leaf
, items
) +
1841 sizeof(struct btrfs_item
) * nr
;
1844 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1846 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1849 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1850 struct btrfs_item
*item
)
1852 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1855 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1857 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1860 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1862 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1865 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1867 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1870 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1871 struct btrfs_disk_key
*disk_key
, int nr
)
1873 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1874 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1877 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1878 struct btrfs_disk_key
*disk_key
, int nr
)
1880 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1881 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1884 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1887 * struct btrfs_root_ref
1889 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1890 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1891 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1893 /* struct btrfs_dir_item */
1894 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1895 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1896 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1897 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1898 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1899 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1901 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1903 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1906 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1907 struct btrfs_dir_item
*item
,
1908 struct btrfs_disk_key
*key
)
1910 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1913 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1914 struct btrfs_dir_item
*item
,
1915 struct btrfs_disk_key
*key
)
1917 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1920 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1922 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1924 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1927 static inline void btrfs_free_space_key(struct extent_buffer
*eb
,
1928 struct btrfs_free_space_header
*h
,
1929 struct btrfs_disk_key
*key
)
1931 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1934 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1935 struct btrfs_free_space_header
*h
,
1936 struct btrfs_disk_key
*key
)
1938 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1941 /* struct btrfs_disk_key */
1942 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1944 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1945 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1947 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1948 struct btrfs_disk_key
*disk
)
1950 cpu
->offset
= le64_to_cpu(disk
->offset
);
1951 cpu
->type
= disk
->type
;
1952 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1955 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1956 struct btrfs_key
*cpu
)
1958 disk
->offset
= cpu_to_le64(cpu
->offset
);
1959 disk
->type
= cpu
->type
;
1960 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1963 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1964 struct btrfs_key
*key
, int nr
)
1966 struct btrfs_disk_key disk_key
;
1967 btrfs_node_key(eb
, &disk_key
, nr
);
1968 btrfs_disk_key_to_cpu(key
, &disk_key
);
1971 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1972 struct btrfs_key
*key
, int nr
)
1974 struct btrfs_disk_key disk_key
;
1975 btrfs_item_key(eb
, &disk_key
, nr
);
1976 btrfs_disk_key_to_cpu(key
, &disk_key
);
1979 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1980 struct btrfs_dir_item
*item
,
1981 struct btrfs_key
*key
)
1983 struct btrfs_disk_key disk_key
;
1984 btrfs_dir_item_key(eb
, item
, &disk_key
);
1985 btrfs_disk_key_to_cpu(key
, &disk_key
);
1989 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1994 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1999 /* struct btrfs_header */
2000 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2001 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2003 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2004 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2005 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2006 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2007 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2009 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2010 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2012 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2014 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
2016 return (btrfs_header_flags(eb
) & flag
) == flag
;
2019 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2021 u64 flags
= btrfs_header_flags(eb
);
2022 btrfs_set_header_flags(eb
, flags
| flag
);
2023 return (flags
& flag
) == flag
;
2026 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2028 u64 flags
= btrfs_header_flags(eb
);
2029 btrfs_set_header_flags(eb
, flags
& ~flag
);
2030 return (flags
& flag
) == flag
;
2033 static inline int btrfs_header_backref_rev(struct extent_buffer
*eb
)
2035 u64 flags
= btrfs_header_flags(eb
);
2036 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2039 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2042 u64 flags
= btrfs_header_flags(eb
);
2043 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2044 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2045 btrfs_set_header_flags(eb
, flags
);
2048 static inline unsigned long btrfs_header_fsid(void)
2050 return offsetof(struct btrfs_header
, fsid
);
2053 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
2055 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2058 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
2060 return btrfs_header_level(eb
) == 0;
2063 /* struct btrfs_root_item */
2064 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2066 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2067 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2068 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2070 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2072 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2073 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2074 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2075 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2076 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2077 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2078 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2079 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2081 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2083 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2085 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2087 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2089 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2092 static inline bool btrfs_root_readonly(struct btrfs_root
*root
)
2094 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2097 static inline bool btrfs_root_dead(struct btrfs_root
*root
)
2099 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2102 /* struct btrfs_root_backup */
2103 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2105 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2107 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2108 tree_root_level
, 8);
2110 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2112 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2113 chunk_root_gen
, 64);
2114 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2115 chunk_root_level
, 8);
2117 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2119 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2120 extent_root_gen
, 64);
2121 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2122 extent_root_level
, 8);
2124 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2126 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2128 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2131 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2133 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2135 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2138 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2140 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2142 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2143 csum_root_level
, 8);
2144 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2146 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2148 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2151 /* struct btrfs_balance_item */
2152 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2154 static inline void btrfs_balance_data(struct extent_buffer
*eb
,
2155 struct btrfs_balance_item
*bi
,
2156 struct btrfs_disk_balance_args
*ba
)
2158 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2161 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2162 struct btrfs_balance_item
*bi
,
2163 struct btrfs_disk_balance_args
*ba
)
2165 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2168 static inline void btrfs_balance_meta(struct extent_buffer
*eb
,
2169 struct btrfs_balance_item
*bi
,
2170 struct btrfs_disk_balance_args
*ba
)
2172 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2175 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2176 struct btrfs_balance_item
*bi
,
2177 struct btrfs_disk_balance_args
*ba
)
2179 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2182 static inline void btrfs_balance_sys(struct extent_buffer
*eb
,
2183 struct btrfs_balance_item
*bi
,
2184 struct btrfs_disk_balance_args
*ba
)
2186 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2189 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2190 struct btrfs_balance_item
*bi
,
2191 struct btrfs_disk_balance_args
*ba
)
2193 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2197 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2198 struct btrfs_disk_balance_args
*disk
)
2200 memset(cpu
, 0, sizeof(*cpu
));
2202 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2203 cpu
->usage
= le64_to_cpu(disk
->usage
);
2204 cpu
->devid
= le64_to_cpu(disk
->devid
);
2205 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2206 cpu
->pend
= le64_to_cpu(disk
->pend
);
2207 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2208 cpu
->vend
= le64_to_cpu(disk
->vend
);
2209 cpu
->target
= le64_to_cpu(disk
->target
);
2210 cpu
->flags
= le64_to_cpu(disk
->flags
);
2211 cpu
->limit
= le64_to_cpu(disk
->limit
);
2215 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2216 struct btrfs_balance_args
*cpu
)
2218 memset(disk
, 0, sizeof(*disk
));
2220 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2221 disk
->usage
= cpu_to_le64(cpu
->usage
);
2222 disk
->devid
= cpu_to_le64(cpu
->devid
);
2223 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2224 disk
->pend
= cpu_to_le64(cpu
->pend
);
2225 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2226 disk
->vend
= cpu_to_le64(cpu
->vend
);
2227 disk
->target
= cpu_to_le64(cpu
->target
);
2228 disk
->flags
= cpu_to_le64(cpu
->flags
);
2229 disk
->limit
= cpu_to_le64(cpu
->limit
);
2232 /* struct btrfs_super_block */
2233 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2234 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2235 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2237 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2238 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2239 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2240 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2241 struct btrfs_super_block
, chunk_root_generation
, 64);
2242 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2244 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2246 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2247 chunk_root_level
, 8);
2248 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2250 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2251 log_root_transid
, 64);
2252 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2254 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2256 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2258 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2260 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2262 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2264 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2265 root_dir_objectid
, 64);
2266 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2268 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2270 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2271 compat_ro_flags
, 64);
2272 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2273 incompat_flags
, 64);
2274 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2276 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2277 cache_generation
, 64);
2278 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2279 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2280 uuid_tree_generation
, 64);
2282 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
2284 u16 t
= btrfs_super_csum_type(s
);
2286 * csum type is validated at mount time
2288 return btrfs_csum_sizes
[t
];
2291 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
2293 return offsetof(struct btrfs_leaf
, items
);
2296 /* struct btrfs_file_extent_item */
2297 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2298 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2299 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2300 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2301 struct btrfs_file_extent_item
, offset
, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2303 struct btrfs_file_extent_item
, generation
, 64);
2304 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2305 struct btrfs_file_extent_item
, num_bytes
, 64);
2306 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2307 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2308 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2309 struct btrfs_file_extent_item
, compression
, 8);
2311 static inline unsigned long
2312 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
2314 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2317 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2319 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2322 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2324 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2326 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2327 disk_num_bytes
, 64);
2328 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2330 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2332 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2334 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2336 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2338 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2339 other_encoding
, 16);
2342 * this returns the number of bytes used by the item on disk, minus the
2343 * size of any extent headers. If a file is compressed on disk, this is
2344 * the compressed size
2346 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
2347 struct btrfs_item
*e
)
2349 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2352 /* this returns the number of file bytes represented by the inline item.
2353 * If an item is compressed, this is the uncompressed size
2355 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
2357 struct btrfs_file_extent_item
*fi
)
2359 struct btrfs_map_token token
;
2361 btrfs_init_map_token(&token
);
2363 * return the space used on disk if this item isn't
2364 * compressed or encoded
2366 if (btrfs_token_file_extent_compression(eb
, fi
, &token
) == 0 &&
2367 btrfs_token_file_extent_encryption(eb
, fi
, &token
) == 0 &&
2368 btrfs_token_file_extent_other_encoding(eb
, fi
, &token
) == 0) {
2369 return btrfs_file_extent_inline_item_len(eb
,
2370 btrfs_item_nr(slot
));
2373 /* otherwise use the ram bytes field */
2374 return btrfs_token_file_extent_ram_bytes(eb
, fi
, &token
);
2378 /* btrfs_dev_stats_item */
2379 static inline u64
btrfs_dev_stats_value(struct extent_buffer
*eb
,
2380 struct btrfs_dev_stats_item
*ptr
,
2385 read_extent_buffer(eb
, &val
,
2386 offsetof(struct btrfs_dev_stats_item
, values
) +
2387 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2392 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2393 struct btrfs_dev_stats_item
*ptr
,
2396 write_extent_buffer(eb
, &val
,
2397 offsetof(struct btrfs_dev_stats_item
, values
) +
2398 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2402 /* btrfs_qgroup_status_item */
2403 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2405 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2407 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2409 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2412 /* btrfs_qgroup_info_item */
2413 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2415 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2416 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2418 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2419 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2422 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2423 struct btrfs_qgroup_info_item
, generation
, 64);
2424 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2426 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2427 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2428 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2430 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2431 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2433 /* btrfs_qgroup_limit_item */
2434 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2436 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2438 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2440 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2442 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2445 /* btrfs_dev_replace_item */
2446 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2447 struct btrfs_dev_replace_item
, src_devid
, 64);
2448 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2449 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2451 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2453 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2455 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2457 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2458 num_write_errors
, 64);
2459 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2460 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2462 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2464 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2467 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2468 struct btrfs_dev_replace_item
, src_devid
, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2470 struct btrfs_dev_replace_item
,
2471 cont_reading_from_srcdev_mode
, 64);
2472 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2473 struct btrfs_dev_replace_item
, replace_state
, 64);
2474 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2475 struct btrfs_dev_replace_item
, time_started
, 64);
2476 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2477 struct btrfs_dev_replace_item
, time_stopped
, 64);
2478 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2479 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2480 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2481 struct btrfs_dev_replace_item
,
2482 num_uncorrectable_read_errors
, 64);
2483 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2484 struct btrfs_dev_replace_item
, cursor_left
, 64);
2485 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2486 struct btrfs_dev_replace_item
, cursor_right
, 64);
2488 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
2490 return sb
->s_fs_info
;
2493 /* helper function to cast into the data area of the leaf. */
2494 #define btrfs_item_ptr(leaf, slot, type) \
2495 ((type *)(btrfs_leaf_data(leaf) + \
2496 btrfs_item_offset_nr(leaf, slot)))
2498 #define btrfs_item_ptr_offset(leaf, slot) \
2499 ((unsigned long)(btrfs_leaf_data(leaf) + \
2500 btrfs_item_offset_nr(leaf, slot)))
2502 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2504 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2505 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2508 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2510 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2515 u64
btrfs_csum_bytes_to_leaves(struct btrfs_root
*root
, u64 csum_bytes
);
2517 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_root
*root
,
2520 return root
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2524 * Doing a truncate won't result in new nodes or leaves, just what we need for
2527 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_root
*root
,
2530 return root
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2533 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
,
2534 struct btrfs_root
*root
);
2535 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle
*trans
,
2536 struct btrfs_root
*root
);
2537 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2539 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2540 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2541 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2542 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2543 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2544 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2545 struct btrfs_root
*root
, unsigned long count
);
2546 int btrfs_async_run_delayed_refs(struct btrfs_root
*root
,
2547 unsigned long count
, u64 transid
, int wait
);
2548 int btrfs_lookup_data_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
2549 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2550 struct btrfs_root
*root
, u64 bytenr
,
2551 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2552 int btrfs_pin_extent(struct btrfs_root
*root
,
2553 u64 bytenr
, u64 num
, int reserved
);
2554 int btrfs_pin_extent_for_log_replay(struct btrfs_root
*root
,
2555 u64 bytenr
, u64 num_bytes
);
2556 int btrfs_exclude_logged_extents(struct btrfs_root
*root
,
2557 struct extent_buffer
*eb
);
2558 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
2559 struct btrfs_root
*root
,
2560 u64 objectid
, u64 offset
, u64 bytenr
);
2561 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2562 struct btrfs_fs_info
*info
,
2564 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2565 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2566 int get_block_group_index(struct btrfs_block_group_cache
*cache
);
2567 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2568 struct btrfs_root
*root
, u64 parent
,
2570 struct btrfs_disk_key
*key
, int level
,
2571 u64 hint
, u64 empty_size
);
2572 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2573 struct btrfs_root
*root
,
2574 struct extent_buffer
*buf
,
2575 u64 parent
, int last_ref
);
2576 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2577 struct btrfs_root
*root
,
2578 u64 root_objectid
, u64 owner
,
2579 u64 offset
, u64 ram_bytes
,
2580 struct btrfs_key
*ins
);
2581 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2582 struct btrfs_root
*root
,
2583 u64 root_objectid
, u64 owner
, u64 offset
,
2584 struct btrfs_key
*ins
);
2585 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 ram_bytes
, u64 num_bytes
,
2586 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2587 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2588 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2589 struct extent_buffer
*buf
, int full_backref
);
2590 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2591 struct extent_buffer
*buf
, int full_backref
);
2592 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2593 struct btrfs_root
*root
,
2594 u64 bytenr
, u64 num_bytes
, u64 flags
,
2595 int level
, int is_data
);
2596 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2597 struct btrfs_root
*root
,
2598 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2599 u64 owner
, u64 offset
);
2601 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
,
2603 int btrfs_free_and_pin_reserved_extent(struct btrfs_root
*root
,
2604 u64 start
, u64 len
);
2605 void btrfs_prepare_extent_commit(struct btrfs_trans_handle
*trans
,
2606 struct btrfs_root
*root
);
2607 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
2608 struct btrfs_root
*root
);
2609 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2610 struct btrfs_root
*root
,
2611 u64 bytenr
, u64 num_bytes
, u64 parent
,
2612 u64 root_objectid
, u64 owner
, u64 offset
);
2614 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2615 struct btrfs_root
*root
);
2616 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2617 struct btrfs_root
*root
);
2618 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2619 struct btrfs_root
*root
);
2620 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
2621 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2622 int btrfs_read_block_groups(struct btrfs_root
*root
);
2623 int btrfs_can_relocate(struct btrfs_root
*root
, u64 bytenr
);
2624 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2625 struct btrfs_root
*root
, u64 bytes_used
,
2626 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
2628 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2629 struct btrfs_fs_info
*fs_info
,
2630 const u64 chunk_offset
);
2631 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2632 struct btrfs_root
*root
, u64 group_start
,
2633 struct extent_map
*em
);
2634 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2635 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2636 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2637 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
,
2638 struct btrfs_root
*root
);
2639 u64
btrfs_get_alloc_profile(struct btrfs_root
*root
, int data
);
2640 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2642 enum btrfs_reserve_flush_enum
{
2643 /* If we are in the transaction, we can't flush anything.*/
2644 BTRFS_RESERVE_NO_FLUSH
,
2646 * Flushing delalloc may cause deadlock somewhere, in this
2647 * case, use FLUSH LIMIT
2649 BTRFS_RESERVE_FLUSH_LIMIT
,
2650 BTRFS_RESERVE_FLUSH_ALL
,
2653 enum btrfs_flush_state
{
2654 FLUSH_DELAYED_ITEMS_NR
= 1,
2655 FLUSH_DELAYED_ITEMS
= 2,
2657 FLUSH_DELALLOC_WAIT
= 4,
2662 int btrfs_check_data_free_space(struct inode
*inode
, u64 start
, u64 len
);
2663 int btrfs_alloc_data_chunk_ondemand(struct inode
*inode
, u64 bytes
);
2664 void btrfs_free_reserved_data_space(struct inode
*inode
, u64 start
, u64 len
);
2665 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2667 void btrfs_trans_release_metadata(struct btrfs_trans_handle
*trans
,
2668 struct btrfs_root
*root
);
2669 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2670 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle
*trans
,
2671 struct inode
*inode
);
2672 void btrfs_orphan_release_metadata(struct inode
*inode
);
2673 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2674 struct btrfs_block_rsv
*rsv
,
2676 u64
*qgroup_reserved
, bool use_global_rsv
);
2677 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
2678 struct btrfs_block_rsv
*rsv
,
2679 u64 qgroup_reserved
);
2680 int btrfs_delalloc_reserve_metadata(struct inode
*inode
, u64 num_bytes
);
2681 void btrfs_delalloc_release_metadata(struct inode
*inode
, u64 num_bytes
);
2682 int btrfs_delalloc_reserve_space(struct inode
*inode
, u64 start
, u64 len
);
2683 void btrfs_delalloc_release_space(struct inode
*inode
, u64 start
, u64 len
);
2684 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2685 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_root
*root
,
2686 unsigned short type
);
2687 void btrfs_free_block_rsv(struct btrfs_root
*root
,
2688 struct btrfs_block_rsv
*rsv
);
2689 void __btrfs_free_block_rsv(struct btrfs_block_rsv
*rsv
);
2690 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2691 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2692 enum btrfs_reserve_flush_enum flush
);
2693 int btrfs_block_rsv_check(struct btrfs_root
*root
,
2694 struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2695 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2696 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2697 enum btrfs_reserve_flush_enum flush
);
2698 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2699 struct btrfs_block_rsv
*dst_rsv
, u64 num_bytes
,
2701 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2702 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2704 void btrfs_block_rsv_release(struct btrfs_root
*root
,
2705 struct btrfs_block_rsv
*block_rsv
,
2707 int btrfs_inc_block_group_ro(struct btrfs_root
*root
,
2708 struct btrfs_block_group_cache
*cache
);
2709 void btrfs_dec_block_group_ro(struct btrfs_root
*root
,
2710 struct btrfs_block_group_cache
*cache
);
2711 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2712 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2713 int btrfs_error_unpin_extent_range(struct btrfs_root
*root
,
2714 u64 start
, u64 end
);
2715 int btrfs_discard_extent(struct btrfs_root
*root
, u64 bytenr
,
2716 u64 num_bytes
, u64
*actual_bytes
);
2717 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
,
2718 struct btrfs_root
*root
, u64 type
);
2719 int btrfs_trim_fs(struct btrfs_root
*root
, struct fstrim_range
*range
);
2721 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2722 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2723 struct btrfs_fs_info
*fs_info
);
2724 int __get_raid_index(u64 flags
);
2725 int btrfs_start_write_no_snapshoting(struct btrfs_root
*root
);
2726 void btrfs_end_write_no_snapshoting(struct btrfs_root
*root
);
2727 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2728 void check_system_chunk(struct btrfs_trans_handle
*trans
,
2729 struct btrfs_root
*root
,
2731 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2732 struct btrfs_fs_info
*info
, u64 start
, u64 end
);
2735 int btrfs_bin_search(struct extent_buffer
*eb
, struct btrfs_key
*key
,
2736 int level
, int *slot
);
2737 int btrfs_comp_cpu_keys(struct btrfs_key
*k1
, struct btrfs_key
*k2
);
2738 int btrfs_previous_item(struct btrfs_root
*root
,
2739 struct btrfs_path
*path
, u64 min_objectid
,
2741 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2742 struct btrfs_path
*path
, u64 min_objectid
);
2743 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2744 struct btrfs_path
*path
,
2745 struct btrfs_key
*new_key
);
2746 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2747 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2748 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2749 struct btrfs_key
*key
, int lowest_level
,
2751 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2752 struct btrfs_path
*path
,
2754 enum btrfs_compare_tree_result
{
2755 BTRFS_COMPARE_TREE_NEW
,
2756 BTRFS_COMPARE_TREE_DELETED
,
2757 BTRFS_COMPARE_TREE_CHANGED
,
2758 BTRFS_COMPARE_TREE_SAME
,
2760 typedef int (*btrfs_changed_cb_t
)(struct btrfs_root
*left_root
,
2761 struct btrfs_root
*right_root
,
2762 struct btrfs_path
*left_path
,
2763 struct btrfs_path
*right_path
,
2764 struct btrfs_key
*key
,
2765 enum btrfs_compare_tree_result result
,
2767 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2768 struct btrfs_root
*right_root
,
2769 btrfs_changed_cb_t cb
, void *ctx
);
2770 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2771 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2772 struct extent_buffer
*parent
, int parent_slot
,
2773 struct extent_buffer
**cow_ret
);
2774 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2775 struct btrfs_root
*root
,
2776 struct extent_buffer
*buf
,
2777 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2778 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2779 struct extent_buffer
*buf
);
2780 void btrfs_extend_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2782 void btrfs_truncate_item(struct btrfs_root
*root
, struct btrfs_path
*path
,
2783 u32 new_size
, int from_end
);
2784 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2785 struct btrfs_root
*root
,
2786 struct btrfs_path
*path
,
2787 struct btrfs_key
*new_key
,
2788 unsigned long split_offset
);
2789 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2790 struct btrfs_root
*root
,
2791 struct btrfs_path
*path
,
2792 struct btrfs_key
*new_key
);
2793 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2794 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2795 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
2796 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
2798 int btrfs_search_old_slot(struct btrfs_root
*root
, struct btrfs_key
*key
,
2799 struct btrfs_path
*p
, u64 time_seq
);
2800 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2801 struct btrfs_key
*key
, struct btrfs_path
*p
,
2802 int find_higher
, int return_any
);
2803 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2804 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2805 int start_slot
, u64
*last_ret
,
2806 struct btrfs_key
*progress
);
2807 void btrfs_release_path(struct btrfs_path
*p
);
2808 struct btrfs_path
*btrfs_alloc_path(void);
2809 void btrfs_free_path(struct btrfs_path
*p
);
2810 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2811 void btrfs_clear_path_blocking(struct btrfs_path
*p
,
2812 struct extent_buffer
*held
, int held_rw
);
2813 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2815 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2816 struct btrfs_path
*path
, int slot
, int nr
);
2817 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2818 struct btrfs_root
*root
,
2819 struct btrfs_path
*path
)
2821 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2824 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2825 struct btrfs_key
*cpu_key
, u32
*data_size
,
2826 u32 total_data
, u32 total_size
, int nr
);
2827 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
2828 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
2829 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2830 struct btrfs_root
*root
,
2831 struct btrfs_path
*path
,
2832 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
2834 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2835 struct btrfs_root
*root
,
2836 struct btrfs_path
*path
,
2837 struct btrfs_key
*key
,
2840 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2843 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2844 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2845 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2847 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2848 struct btrfs_path
*p
, u64 time_seq
)
2851 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2852 return btrfs_next_old_leaf(root
, p
, time_seq
);
2855 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2857 return btrfs_next_old_item(root
, p
, 0);
2859 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
2860 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
2861 struct btrfs_block_rsv
*block_rsv
,
2862 int update_ref
, int for_reloc
);
2863 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2864 struct btrfs_root
*root
,
2865 struct extent_buffer
*node
,
2866 struct extent_buffer
*parent
);
2867 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2870 * Do it this way so we only ever do one test_bit in the normal case.
2872 if (test_bit(BTRFS_FS_CLOSING_START
, &fs_info
->flags
)) {
2873 if (test_bit(BTRFS_FS_CLOSING_DONE
, &fs_info
->flags
))
2881 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2882 * anything except sleeping. This function is used to check the status of
2885 static inline int btrfs_need_cleaner_sleep(struct btrfs_root
*root
)
2887 return (root
->fs_info
->sb
->s_flags
& MS_RDONLY
||
2888 btrfs_fs_closing(root
->fs_info
));
2891 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
2893 kfree(fs_info
->balance_ctl
);
2894 kfree(fs_info
->delayed_root
);
2895 kfree(fs_info
->extent_root
);
2896 kfree(fs_info
->tree_root
);
2897 kfree(fs_info
->chunk_root
);
2898 kfree(fs_info
->dev_root
);
2899 kfree(fs_info
->csum_root
);
2900 kfree(fs_info
->quota_root
);
2901 kfree(fs_info
->uuid_root
);
2902 kfree(fs_info
->free_space_root
);
2903 kfree(fs_info
->super_copy
);
2904 kfree(fs_info
->super_for_commit
);
2905 security_free_mnt_opts(&fs_info
->security_opts
);
2909 /* tree mod log functions from ctree.c */
2910 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2911 struct seq_list
*elem
);
2912 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2913 struct seq_list
*elem
);
2914 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2917 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
2918 struct btrfs_root
*tree_root
,
2919 u64 root_id
, u64 ref_id
, u64 dirid
, u64 sequence
,
2920 const char *name
, int name_len
);
2921 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
,
2922 struct btrfs_root
*tree_root
,
2923 u64 root_id
, u64 ref_id
, u64 dirid
, u64
*sequence
,
2924 const char *name
, int name_len
);
2925 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2926 struct btrfs_key
*key
);
2927 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
2928 *root
, struct btrfs_key
*key
, struct btrfs_root_item
2930 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2931 struct btrfs_root
*root
,
2932 struct btrfs_key
*key
,
2933 struct btrfs_root_item
*item
);
2934 int btrfs_find_root(struct btrfs_root
*root
, struct btrfs_key
*search_key
,
2935 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
2936 struct btrfs_key
*root_key
);
2937 int btrfs_find_orphan_roots(struct btrfs_root
*tree_root
);
2938 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2939 struct extent_buffer
*node
);
2940 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2941 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
2942 struct btrfs_root
*root
);
2945 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
,
2946 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2948 int btrfs_uuid_tree_rem(struct btrfs_trans_handle
*trans
,
2949 struct btrfs_root
*uuid_root
, u8
*uuid
, u8 type
,
2951 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
2952 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
2956 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
2957 const char *name
, int name_len
);
2958 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2959 struct btrfs_root
*root
, const char *name
,
2960 int name_len
, struct inode
*dir
,
2961 struct btrfs_key
*location
, u8 type
, u64 index
);
2962 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2963 struct btrfs_root
*root
,
2964 struct btrfs_path
*path
, u64 dir
,
2965 const char *name
, int name_len
,
2967 struct btrfs_dir_item
*
2968 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2969 struct btrfs_root
*root
,
2970 struct btrfs_path
*path
, u64 dir
,
2971 u64 objectid
, const char *name
, int name_len
,
2973 struct btrfs_dir_item
*
2974 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2975 struct btrfs_path
*path
, u64 dirid
,
2976 const char *name
, int name_len
);
2977 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2978 struct btrfs_root
*root
,
2979 struct btrfs_path
*path
,
2980 struct btrfs_dir_item
*di
);
2981 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2982 struct btrfs_root
*root
,
2983 struct btrfs_path
*path
, u64 objectid
,
2984 const char *name
, u16 name_len
,
2985 const void *data
, u16 data_len
);
2986 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2987 struct btrfs_root
*root
,
2988 struct btrfs_path
*path
, u64 dir
,
2989 const char *name
, u16 name_len
,
2991 int verify_dir_item(struct btrfs_root
*root
,
2992 struct extent_buffer
*leaf
,
2993 struct btrfs_dir_item
*dir_item
);
2994 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2995 struct btrfs_path
*path
,
3000 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3001 struct btrfs_root
*root
, u64 offset
);
3002 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3003 struct btrfs_root
*root
, u64 offset
);
3004 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3007 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3008 struct btrfs_root
*root
,
3009 const char *name
, int name_len
,
3010 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3011 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3012 struct btrfs_root
*root
,
3013 const char *name
, int name_len
,
3014 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3015 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3016 struct btrfs_root
*root
,
3017 struct btrfs_path
*path
, u64 objectid
);
3018 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3019 *root
, struct btrfs_path
*path
,
3020 struct btrfs_key
*location
, int mod
);
3022 struct btrfs_inode_extref
*
3023 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3024 struct btrfs_root
*root
,
3025 struct btrfs_path
*path
,
3026 const char *name
, int name_len
,
3027 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3030 int btrfs_find_name_in_ext_backref(struct btrfs_path
*path
,
3031 u64 ref_objectid
, const char *name
,
3033 struct btrfs_inode_extref
**extref_ret
);
3036 struct btrfs_dio_private
;
3037 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3038 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3039 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
3040 struct bio
*bio
, u32
*dst
);
3041 int btrfs_lookup_bio_sums_dio(struct btrfs_root
*root
, struct inode
*inode
,
3042 struct bio
*bio
, u64 logical_offset
);
3043 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3044 struct btrfs_root
*root
,
3045 u64 objectid
, u64 pos
,
3046 u64 disk_offset
, u64 disk_num_bytes
,
3047 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3048 u8 compression
, u8 encryption
, u16 other_encoding
);
3049 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3050 struct btrfs_root
*root
,
3051 struct btrfs_path
*path
, u64 objectid
,
3052 u64 bytenr
, int mod
);
3053 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3054 struct btrfs_root
*root
,
3055 struct btrfs_ordered_sum
*sums
);
3056 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
3057 struct bio
*bio
, u64 file_start
, int contig
);
3058 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3059 struct list_head
*list
, int search_commit
);
3060 void btrfs_extent_item_to_extent_map(struct inode
*inode
,
3061 const struct btrfs_path
*path
,
3062 struct btrfs_file_extent_item
*fi
,
3063 const bool new_inline
,
3064 struct extent_map
*em
);
3067 struct btrfs_delalloc_work
{
3068 struct inode
*inode
;
3070 struct completion completion
;
3071 struct list_head list
;
3072 struct btrfs_work work
;
3075 struct btrfs_delalloc_work
*btrfs_alloc_delalloc_work(struct inode
*inode
,
3077 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work
*work
);
3079 struct extent_map
*btrfs_get_extent_fiemap(struct inode
*inode
, struct page
*page
,
3080 size_t pg_offset
, u64 start
, u64 len
,
3082 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3083 u64
*orig_start
, u64
*orig_block_len
,
3086 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3087 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3088 #define ClearPageChecked ClearPageFsMisc
3089 #define SetPageChecked SetPageFsMisc
3090 #define PageChecked PageFsMisc
3093 /* This forces readahead on a given range of bytes in an inode */
3094 static inline void btrfs_force_ra(struct address_space
*mapping
,
3095 struct file_ra_state
*ra
, struct file
*file
,
3096 pgoff_t offset
, unsigned long req_size
)
3098 page_cache_sync_readahead(mapping
, ra
, file
, offset
, req_size
);
3101 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3102 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
3103 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3104 struct btrfs_root
*root
,
3105 struct inode
*dir
, struct inode
*inode
,
3106 const char *name
, int name_len
);
3107 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3108 struct inode
*parent_inode
, struct inode
*inode
,
3109 const char *name
, int name_len
, int add_backref
, u64 index
);
3110 int btrfs_unlink_subvol(struct btrfs_trans_handle
*trans
,
3111 struct btrfs_root
*root
,
3112 struct inode
*dir
, u64 objectid
,
3113 const char *name
, int name_len
);
3114 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3116 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3117 struct btrfs_root
*root
,
3118 struct inode
*inode
, u64 new_size
,
3121 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
, int delay_iput
);
3122 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int delay_iput
,
3124 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3125 struct extent_state
**cached_state
, int dedupe
);
3126 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3127 struct btrfs_root
*new_root
,
3128 struct btrfs_root
*parent_root
,
3130 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
3131 size_t size
, struct bio
*bio
,
3132 unsigned long bio_flags
);
3133 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct vm_fault
*vmf
);
3134 int btrfs_readpage(struct file
*file
, struct page
*page
);
3135 void btrfs_evict_inode(struct inode
*inode
);
3136 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3137 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3138 void btrfs_destroy_inode(struct inode
*inode
);
3139 int btrfs_drop_inode(struct inode
*inode
);
3140 int btrfs_init_cachep(void);
3141 void btrfs_destroy_cachep(void);
3142 long btrfs_ioctl_trans_end(struct file
*file
);
3143 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3144 struct btrfs_root
*root
, int *was_new
);
3145 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
3146 size_t pg_offset
, u64 start
, u64 end
,
3148 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3149 struct btrfs_root
*root
,
3150 struct inode
*inode
);
3151 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3152 struct btrfs_root
*root
, struct inode
*inode
);
3153 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
3154 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3155 void btrfs_orphan_commit_root(struct btrfs_trans_handle
*trans
,
3156 struct btrfs_root
*root
);
3157 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3158 void btrfs_invalidate_inodes(struct btrfs_root
*root
);
3159 void btrfs_add_delayed_iput(struct inode
*inode
);
3160 void btrfs_run_delayed_iputs(struct btrfs_root
*root
);
3161 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3162 u64 start
, u64 num_bytes
, u64 min_size
,
3163 loff_t actual_len
, u64
*alloc_hint
);
3164 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3165 struct btrfs_trans_handle
*trans
, int mode
,
3166 u64 start
, u64 num_bytes
, u64 min_size
,
3167 loff_t actual_len
, u64
*alloc_hint
);
3168 int btrfs_inode_check_errors(struct inode
*inode
);
3169 extern const struct dentry_operations btrfs_dentry_operations
;
3170 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3171 void btrfs_test_inode_set_ops(struct inode
*inode
);
3175 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3176 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3177 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3178 void btrfs_update_iflags(struct inode
*inode
);
3179 void btrfs_inherit_iflags(struct inode
*inode
, struct inode
*dir
);
3180 int btrfs_is_empty_uuid(u8
*uuid
);
3181 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3182 struct btrfs_ioctl_defrag_range_args
*range
,
3183 u64 newer_than
, unsigned long max_pages
);
3184 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3185 struct btrfs_ioctl_space_info
*space
);
3186 void update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
, int lock
,
3187 struct btrfs_ioctl_balance_args
*bargs
);
3188 ssize_t
btrfs_dedupe_file_range(struct file
*src_file
, u64 loff
, u64 olen
,
3189 struct file
*dst_file
, u64 dst_loff
);
3192 int btrfs_auto_defrag_init(void);
3193 void btrfs_auto_defrag_exit(void);
3194 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3195 struct inode
*inode
);
3196 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3197 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3198 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3199 void btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
3201 extern const struct file_operations btrfs_file_operations
;
3202 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3203 struct btrfs_root
*root
, struct inode
*inode
,
3204 struct btrfs_path
*path
, u64 start
, u64 end
,
3205 u64
*drop_end
, int drop_cache
,
3207 u32 extent_item_size
,
3209 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3210 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3211 u64 end
, int drop_cache
);
3212 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3213 struct inode
*inode
, u64 start
, u64 end
);
3214 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3215 int btrfs_dirty_pages(struct btrfs_root
*root
, struct inode
*inode
,
3216 struct page
**pages
, size_t num_pages
,
3217 loff_t pos
, size_t write_bytes
,
3218 struct extent_state
**cached
);
3219 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3220 ssize_t
btrfs_copy_file_range(struct file
*file_in
, loff_t pos_in
,
3221 struct file
*file_out
, loff_t pos_out
,
3222 size_t len
, unsigned int flags
);
3223 int btrfs_clone_file_range(struct file
*file_in
, loff_t pos_in
,
3224 struct file
*file_out
, loff_t pos_out
, u64 len
);
3227 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3228 struct btrfs_root
*root
);
3231 int btrfs_init_sysfs(void);
3232 void btrfs_exit_sysfs(void);
3233 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3234 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3237 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
3240 int btrfs_parse_options(struct btrfs_root
*root
, char *options
,
3241 unsigned long new_flags
);
3242 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3244 #ifdef CONFIG_PRINTK
3246 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3248 static inline __printf(2, 3)
3249 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3254 #define btrfs_emerg(fs_info, fmt, args...) \
3255 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3256 #define btrfs_alert(fs_info, fmt, args...) \
3257 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3258 #define btrfs_crit(fs_info, fmt, args...) \
3259 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3260 #define btrfs_err(fs_info, fmt, args...) \
3261 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3262 #define btrfs_warn(fs_info, fmt, args...) \
3263 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3264 #define btrfs_notice(fs_info, fmt, args...) \
3265 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3266 #define btrfs_info(fs_info, fmt, args...) \
3267 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3270 * Wrappers that use printk_in_rcu
3272 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3273 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3274 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3275 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3276 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3277 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3278 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3279 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3280 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3281 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3282 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3283 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3284 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3285 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3288 * Wrappers that use a ratelimited printk_in_rcu
3290 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3291 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3292 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3293 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3294 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3295 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3296 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3297 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3298 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3299 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3300 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3301 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3302 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3303 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3306 * Wrappers that use a ratelimited printk
3308 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3309 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3310 #define btrfs_alert_rl(fs_info, fmt, args...) \
3311 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3312 #define btrfs_crit_rl(fs_info, fmt, args...) \
3313 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3314 #define btrfs_err_rl(fs_info, fmt, args...) \
3315 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3316 #define btrfs_warn_rl(fs_info, fmt, args...) \
3317 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3318 #define btrfs_notice_rl(fs_info, fmt, args...) \
3319 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3320 #define btrfs_info_rl(fs_info, fmt, args...) \
3321 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3323 #if defined(CONFIG_DYNAMIC_DEBUG)
3324 #define btrfs_debug(fs_info, fmt, args...) \
3326 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3327 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3328 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3330 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3332 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3333 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3334 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3336 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3338 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3339 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3340 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3343 #define btrfs_debug_rl(fs_info, fmt, args...) \
3345 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3346 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3347 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3350 #elif defined(DEBUG)
3351 #define btrfs_debug(fs_info, fmt, args...) \
3352 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3353 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3354 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3355 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3356 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3357 #define btrfs_debug_rl(fs_info, fmt, args...) \
3358 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3360 #define btrfs_debug(fs_info, fmt, args...) \
3361 no_printk(KERN_DEBUG fmt, ##args)
3362 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3363 no_printk(KERN_DEBUG fmt, ##args)
3364 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3365 no_printk(KERN_DEBUG fmt, ##args)
3366 #define btrfs_debug_rl(fs_info, fmt, args...) \
3367 no_printk(KERN_DEBUG fmt, ##args)
3370 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3373 btrfs_printk(fs_info, fmt, ##args); \
3374 rcu_read_unlock(); \
3377 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3379 static DEFINE_RATELIMIT_STATE(_rs, \
3380 DEFAULT_RATELIMIT_INTERVAL, \
3381 DEFAULT_RATELIMIT_BURST); \
3382 if (__ratelimit(&_rs)) \
3383 btrfs_printk(fs_info, fmt, ##args); \
3386 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3389 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3390 rcu_read_unlock(); \
3393 #ifdef CONFIG_BTRFS_ASSERT
3396 static inline void assfail(char *expr
, char *file
, int line
)
3398 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3403 #define ASSERT(expr) \
3404 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3406 #define ASSERT(expr) ((void)0)
3411 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3412 unsigned int line
, int errno
, const char *fmt
, ...);
3414 const char *btrfs_decode_error(int errno
);
3417 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3418 const char *function
,
3419 unsigned int line
, int errno
);
3422 * Call btrfs_abort_transaction as early as possible when an error condition is
3423 * detected, that way the exact line number is reported.
3425 #define btrfs_abort_transaction(trans, errno) \
3427 /* Report first abort since mount */ \
3428 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3429 &((trans)->fs_info->fs_state))) { \
3430 WARN(1, KERN_DEBUG \
3431 "BTRFS: Transaction aborted (error %d)\n", \
3434 __btrfs_abort_transaction((trans), __func__, \
3435 __LINE__, (errno)); \
3438 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3440 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3441 (errno), fmt, ##args); \
3446 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3447 unsigned int line
, int errno
, const char *fmt
, ...);
3449 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3450 * will panic(). Otherwise we BUG() here.
3452 #define btrfs_panic(fs_info, errno, fmt, args...) \
3454 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3459 /* compatibility and incompatibility defines */
3461 #define btrfs_set_fs_incompat(__fs_info, opt) \
3462 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3464 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3467 struct btrfs_super_block
*disk_super
;
3470 disk_super
= fs_info
->super_copy
;
3471 features
= btrfs_super_incompat_flags(disk_super
);
3472 if (!(features
& flag
)) {
3473 spin_lock(&fs_info
->super_lock
);
3474 features
= btrfs_super_incompat_flags(disk_super
);
3475 if (!(features
& flag
)) {
3477 btrfs_set_super_incompat_flags(disk_super
, features
);
3478 btrfs_info(fs_info
, "setting %llu feature flag",
3481 spin_unlock(&fs_info
->super_lock
);
3485 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3486 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3488 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3491 struct btrfs_super_block
*disk_super
;
3494 disk_super
= fs_info
->super_copy
;
3495 features
= btrfs_super_incompat_flags(disk_super
);
3496 if (features
& flag
) {
3497 spin_lock(&fs_info
->super_lock
);
3498 features
= btrfs_super_incompat_flags(disk_super
);
3499 if (features
& flag
) {
3501 btrfs_set_super_incompat_flags(disk_super
, features
);
3502 btrfs_info(fs_info
, "clearing %llu feature flag",
3505 spin_unlock(&fs_info
->super_lock
);
3509 #define btrfs_fs_incompat(fs_info, opt) \
3510 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3512 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3514 struct btrfs_super_block
*disk_super
;
3515 disk_super
= fs_info
->super_copy
;
3516 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3519 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3520 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3522 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3525 struct btrfs_super_block
*disk_super
;
3528 disk_super
= fs_info
->super_copy
;
3529 features
= btrfs_super_compat_ro_flags(disk_super
);
3530 if (!(features
& flag
)) {
3531 spin_lock(&fs_info
->super_lock
);
3532 features
= btrfs_super_compat_ro_flags(disk_super
);
3533 if (!(features
& flag
)) {
3535 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3536 btrfs_info(fs_info
, "setting %llu ro feature flag",
3539 spin_unlock(&fs_info
->super_lock
);
3543 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3544 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3546 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3549 struct btrfs_super_block
*disk_super
;
3552 disk_super
= fs_info
->super_copy
;
3553 features
= btrfs_super_compat_ro_flags(disk_super
);
3554 if (features
& flag
) {
3555 spin_lock(&fs_info
->super_lock
);
3556 features
= btrfs_super_compat_ro_flags(disk_super
);
3557 if (features
& flag
) {
3559 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3560 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3563 spin_unlock(&fs_info
->super_lock
);
3567 #define btrfs_fs_compat_ro(fs_info, opt) \
3568 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3570 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3572 struct btrfs_super_block
*disk_super
;
3573 disk_super
= fs_info
->super_copy
;
3574 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3578 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3579 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3580 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3581 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3582 struct inode
*inode
, struct inode
*dir
);
3584 #define btrfs_get_acl NULL
3585 #define btrfs_set_acl NULL
3586 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3587 struct inode
*inode
, struct inode
*dir
)
3594 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
3595 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3596 struct btrfs_root
*root
);
3597 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3598 struct btrfs_root
*root
);
3599 int btrfs_recover_relocation(struct btrfs_root
*root
);
3600 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3601 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3602 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3603 struct extent_buffer
*cow
);
3604 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3605 u64
*bytes_to_reserve
);
3606 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3607 struct btrfs_pending_snapshot
*pending
);
3610 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3611 u64 end
, struct btrfs_scrub_progress
*progress
,
3612 int readonly
, int is_dev_replace
);
3613 void btrfs_scrub_pause(struct btrfs_root
*root
);
3614 void btrfs_scrub_continue(struct btrfs_root
*root
);
3615 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3616 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3617 struct btrfs_device
*dev
);
3618 int btrfs_scrub_progress(struct btrfs_root
*root
, u64 devid
,
3619 struct btrfs_scrub_progress
*progress
);
3622 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3623 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3624 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3626 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3628 btrfs_bio_counter_sub(fs_info
, 1);
3632 struct reada_control
{
3633 struct btrfs_root
*root
; /* tree to prefetch */
3634 struct btrfs_key key_start
;
3635 struct btrfs_key key_end
; /* exclusive */
3638 wait_queue_head_t wait
;
3640 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3641 struct btrfs_key
*start
, struct btrfs_key
*end
);
3642 int btrfs_reada_wait(void *handle
);
3643 void btrfs_reada_detach(void *handle
);
3644 int btree_readahead_hook(struct btrfs_fs_info
*fs_info
,
3645 struct extent_buffer
*eb
, u64 start
, int err
);
3647 static inline int is_fstree(u64 rootid
)
3649 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3650 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3651 !btrfs_qgroup_level(rootid
)))
3656 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3658 return signal_pending(current
);
3661 /* Sanity test specific functions */
3662 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3663 void btrfs_test_destroy_inode(struct inode
*inode
);
3666 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3668 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3669 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
,
3670 &fs_info
->fs_state
)))