1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <linux/kobject.h>
20 #include <trace/events/btrfs.h>
21 #include <asm/kmap_types.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle
;
36 struct btrfs_transaction
;
37 struct btrfs_pending_snapshot
;
38 struct btrfs_delayed_ref_root
;
39 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
40 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
41 extern struct kmem_cache
*btrfs_path_cachep
;
42 extern struct kmem_cache
*btrfs_free_space_cachep
;
43 struct btrfs_ordered_sum
;
45 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
47 #define BTRFS_MAX_MIRRORS 3
49 #define BTRFS_MAX_LEVEL 8
51 #define BTRFS_OLDEST_GENERATION 0ULL
54 * the max metadata block size. This limit is somewhat artificial,
55 * but the memmove costs go through the roof for larger blocks.
57 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
60 * we can actually store much bigger names, but lets not confuse the rest
63 #define BTRFS_NAME_LEN 255
66 * Theoretical limit is larger, but we keep this down to a sane
67 * value. That should limit greatly the possibility of collisions on
70 #define BTRFS_LINK_MAX 65535U
72 /* four bytes for CRC32 */
73 static const int btrfs_csum_sizes
[] = { 4 };
75 #define BTRFS_EMPTY_DIR_SIZE 0
77 /* ioprio of readahead is set to idle */
78 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
80 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
83 * Use large batch size to reduce overhead of metadata updates. On the reader
84 * side, we only read it when we are close to ENOSPC and the read overhead is
85 * mostly related to the number of CPUs, so it is OK to use arbitrary large
88 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
90 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
94 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
96 static inline u32
count_max_extents(u64 size
)
98 return div_u64(size
+ BTRFS_MAX_EXTENT_SIZE
- 1, BTRFS_MAX_EXTENT_SIZE
);
101 struct btrfs_mapping_tree
{
102 struct extent_map_tree map_tree
;
105 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
107 BUG_ON(num_stripes
== 0);
108 return sizeof(struct btrfs_chunk
) +
109 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
113 * Runtime (in-memory) states of filesystem
116 /* Global indicator of serious filesystem errors */
117 BTRFS_FS_STATE_ERROR
,
119 * Filesystem is being remounted, allow to skip some operations, like
122 BTRFS_FS_STATE_REMOUNTING
,
123 /* Track if a transaction abort has been reported on this filesystem */
124 BTRFS_FS_STATE_TRANS_ABORTED
,
126 * Bio operations should be blocked on this filesystem because a source
127 * or target device is being destroyed as part of a device replace
129 BTRFS_FS_STATE_DEV_REPLACING
,
130 /* The btrfs_fs_info created for self-tests */
131 BTRFS_FS_STATE_DUMMY_FS_INFO
,
134 #define BTRFS_BACKREF_REV_MAX 256
135 #define BTRFS_BACKREF_REV_SHIFT 56
136 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
137 BTRFS_BACKREF_REV_SHIFT)
139 #define BTRFS_OLD_BACKREF_REV 0
140 #define BTRFS_MIXED_BACKREF_REV 1
143 * every tree block (leaf or node) starts with this header.
145 struct btrfs_header
{
146 /* these first four must match the super block */
147 u8 csum
[BTRFS_CSUM_SIZE
];
148 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
149 __le64 bytenr
; /* which block this node is supposed to live in */
152 /* allowed to be different from the super from here on down */
153 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
158 } __attribute__ ((__packed__
));
161 * this is a very generous portion of the super block, giving us
162 * room to translate 14 chunks with 3 stripes each.
164 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
167 * just in case we somehow lose the roots and are not able to mount,
168 * we store an array of the roots from previous transactions
171 #define BTRFS_NUM_BACKUP_ROOTS 4
172 struct btrfs_root_backup
{
174 __le64 tree_root_gen
;
177 __le64 chunk_root_gen
;
180 __le64 extent_root_gen
;
189 __le64 csum_root_gen
;
199 u8 extent_root_level
;
203 /* future and to align */
205 } __attribute__ ((__packed__
));
208 * the super block basically lists the main trees of the FS
209 * it currently lacks any block count etc etc
211 struct btrfs_super_block
{
212 /* the first 4 fields must match struct btrfs_header */
213 u8 csum
[BTRFS_CSUM_SIZE
];
214 /* FS specific UUID, visible to user */
215 u8 fsid
[BTRFS_FSID_SIZE
];
216 __le64 bytenr
; /* this block number */
219 /* allowed to be different from the btrfs_header from here own down */
226 /* this will help find the new super based on the log root */
227 __le64 log_root_transid
;
230 __le64 root_dir_objectid
;
234 __le32 __unused_leafsize
;
236 __le32 sys_chunk_array_size
;
237 __le64 chunk_root_generation
;
239 __le64 compat_ro_flags
;
240 __le64 incompat_flags
;
245 struct btrfs_dev_item dev_item
;
247 char label
[BTRFS_LABEL_SIZE
];
249 __le64 cache_generation
;
250 __le64 uuid_tree_generation
;
252 /* the UUID written into btree blocks */
253 u8 metadata_uuid
[BTRFS_FSID_SIZE
];
255 /* future expansion */
257 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
258 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
259 } __attribute__ ((__packed__
));
262 * Compat flags that we support. If any incompat flags are set other than the
263 * ones specified below then we will fail to mount
265 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
266 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
267 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
269 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
270 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
271 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
273 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
274 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
276 #define BTRFS_FEATURE_INCOMPAT_SUPP \
277 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
278 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
279 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
280 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
281 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
282 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
283 BTRFS_FEATURE_INCOMPAT_RAID56 | \
284 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
285 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
286 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
287 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
289 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
290 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
291 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
294 * A leaf is full of items. offset and size tell us where to find
295 * the item in the leaf (relative to the start of the data area)
298 struct btrfs_disk_key key
;
301 } __attribute__ ((__packed__
));
304 * leaves have an item area and a data area:
305 * [item0, item1....itemN] [free space] [dataN...data1, data0]
307 * The data is separate from the items to get the keys closer together
311 struct btrfs_header header
;
312 struct btrfs_item items
[];
313 } __attribute__ ((__packed__
));
316 * all non-leaf blocks are nodes, they hold only keys and pointers to
319 struct btrfs_key_ptr
{
320 struct btrfs_disk_key key
;
323 } __attribute__ ((__packed__
));
326 struct btrfs_header header
;
327 struct btrfs_key_ptr ptrs
[];
328 } __attribute__ ((__packed__
));
331 * btrfs_paths remember the path taken from the root down to the leaf.
332 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
333 * to any other levels that are present.
335 * The slots array records the index of the item or block pointer
336 * used while walking the tree.
338 enum { READA_NONE
, READA_BACK
, READA_FORWARD
};
340 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
341 int slots
[BTRFS_MAX_LEVEL
];
342 /* if there is real range locking, this locks field will change */
343 u8 locks
[BTRFS_MAX_LEVEL
];
345 /* keep some upper locks as we walk down */
349 * set by btrfs_split_item, tells search_slot to keep all locks
350 * and to force calls to keep space in the nodes
352 unsigned int search_for_split
:1;
353 unsigned int keep_locks
:1;
354 unsigned int skip_locking
:1;
355 unsigned int leave_spinning
:1;
356 unsigned int search_commit_root
:1;
357 unsigned int need_commit_sem
:1;
358 unsigned int skip_release_on_error
:1;
360 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
361 sizeof(struct btrfs_item))
362 struct btrfs_dev_replace
{
363 u64 replace_state
; /* see #define above */
364 time64_t time_started
; /* seconds since 1-Jan-1970 */
365 time64_t time_stopped
; /* seconds since 1-Jan-1970 */
366 atomic64_t num_write_errors
;
367 atomic64_t num_uncorrectable_read_errors
;
370 u64 committed_cursor_left
;
371 u64 cursor_left_last_write_of_item
;
374 u64 cont_reading_from_srcdev_mode
; /* see #define above */
377 int item_needs_writeback
;
378 struct btrfs_device
*srcdev
;
379 struct btrfs_device
*tgtdev
;
381 struct mutex lock_finishing_cancel_unmount
;
382 struct rw_semaphore rwsem
;
384 struct btrfs_scrub_progress scrub_progress
;
386 struct percpu_counter bio_counter
;
387 wait_queue_head_t replace_wait
;
390 /* For raid type sysfs entries */
391 struct raid_kobject
{
394 struct list_head list
;
397 struct btrfs_space_info
{
400 u64 total_bytes
; /* total bytes in the space,
401 this doesn't take mirrors into account */
402 u64 bytes_used
; /* total bytes used,
403 this doesn't take mirrors into account */
404 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
405 transaction finishes */
406 u64 bytes_reserved
; /* total bytes the allocator has reserved for
407 current allocations */
408 u64 bytes_may_use
; /* number of bytes that may be used for
409 delalloc/allocations */
410 u64 bytes_readonly
; /* total bytes that are read only */
412 u64 max_extent_size
; /* This will hold the maximum extent size of
413 the space info if we had an ENOSPC in the
416 unsigned int full
:1; /* indicates that we cannot allocate any more
417 chunks for this space */
418 unsigned int chunk_alloc
:1; /* set if we are allocating a chunk */
420 unsigned int flush
:1; /* set if we are trying to make space */
422 unsigned int force_alloc
; /* set if we need to force a chunk
423 alloc for this space */
425 u64 disk_used
; /* total bytes used on disk */
426 u64 disk_total
; /* total bytes on disk, takes mirrors into
432 * bytes_pinned is kept in line with what is actually pinned, as in
433 * we've called update_block_group and dropped the bytes_used counter
434 * and increased the bytes_pinned counter. However this means that
435 * bytes_pinned does not reflect the bytes that will be pinned once the
436 * delayed refs are flushed, so this counter is inc'ed every time we
437 * call btrfs_free_extent so it is a realtime count of what will be
438 * freed once the transaction is committed. It will be zeroed every
439 * time the transaction commits.
441 struct percpu_counter total_bytes_pinned
;
443 struct list_head list
;
444 /* Protected by the spinlock 'lock'. */
445 struct list_head ro_bgs
;
446 struct list_head priority_tickets
;
447 struct list_head tickets
;
449 * tickets_id just indicates the next ticket will be handled, so note
450 * it's not stored per ticket.
454 struct rw_semaphore groups_sem
;
455 /* for block groups in our same type */
456 struct list_head block_groups
[BTRFS_NR_RAID_TYPES
];
457 wait_queue_head_t wait
;
460 struct kobject
*block_group_kobjs
[BTRFS_NR_RAID_TYPES
];
464 * Types of block reserves
467 BTRFS_BLOCK_RSV_GLOBAL
,
468 BTRFS_BLOCK_RSV_DELALLOC
,
469 BTRFS_BLOCK_RSV_TRANS
,
470 BTRFS_BLOCK_RSV_CHUNK
,
471 BTRFS_BLOCK_RSV_DELOPS
,
472 BTRFS_BLOCK_RSV_DELREFS
,
473 BTRFS_BLOCK_RSV_EMPTY
,
474 BTRFS_BLOCK_RSV_TEMP
,
477 struct btrfs_block_rsv
{
480 struct btrfs_space_info
*space_info
;
484 unsigned short failfast
;
487 * Qgroup equivalent for @size @reserved
489 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
490 * about things like csum size nor how many tree blocks it will need to
493 * Qgroup cares more about net change of the extent usage.
495 * So for one newly inserted file extent, in worst case it will cause
496 * leaf split and level increase, nodesize for each file extent is
499 * In short, qgroup_size/reserved is the upper limit of possible needed
500 * qgroup metadata reservation.
503 u64 qgroup_rsv_reserved
;
507 * free clusters are used to claim free space in relatively large chunks,
508 * allowing us to do less seeky writes. They are used for all metadata
509 * allocations. In ssd_spread mode they are also used for data allocations.
511 struct btrfs_free_cluster
{
513 spinlock_t refill_lock
;
516 /* largest extent in this cluster */
519 /* first extent starting offset */
522 /* We did a full search and couldn't create a cluster */
525 struct btrfs_block_group_cache
*block_group
;
527 * when a cluster is allocated from a block group, we put the
528 * cluster onto a list in the block group so that it can
529 * be freed before the block group is freed.
531 struct list_head block_group_list
;
534 enum btrfs_caching_type
{
538 BTRFS_CACHE_FINISHED
,
542 enum btrfs_disk_cache_state
{
549 struct btrfs_caching_control
{
550 struct list_head list
;
552 wait_queue_head_t wait
;
553 struct btrfs_work work
;
554 struct btrfs_block_group_cache
*block_group
;
559 /* Once caching_thread() finds this much free space, it will wake up waiters. */
560 #define CACHING_CTL_WAKE_UP SZ_2M
562 struct btrfs_io_ctl
{
566 struct btrfs_fs_info
*fs_info
;
573 unsigned check_crcs
:1;
577 * Tree to record all locked full stripes of a RAID5/6 block group
579 struct btrfs_full_stripe_locks_tree
{
584 struct btrfs_block_group_cache
{
585 struct btrfs_key key
;
586 struct btrfs_block_group_item item
;
587 struct btrfs_fs_info
*fs_info
;
595 u64 cache_generation
;
598 * If the free space extent count exceeds this number, convert the block
601 u32 bitmap_high_thresh
;
604 * If the free space extent count drops below this number, convert the
605 * block group back to extents.
607 u32 bitmap_low_thresh
;
610 * It is just used for the delayed data space allocation because
611 * only the data space allocation and the relative metadata update
612 * can be done cross the transaction.
614 struct rw_semaphore data_rwsem
;
616 /* for raid56, this is a full stripe, without parity */
617 unsigned long full_stripe_len
;
621 unsigned int has_caching_ctl
:1;
622 unsigned int removed
:1;
624 int disk_cache_state
;
626 /* cache tracking stuff */
628 struct btrfs_caching_control
*caching_ctl
;
629 u64 last_byte_to_unpin
;
631 struct btrfs_space_info
*space_info
;
633 /* free space cache stuff */
634 struct btrfs_free_space_ctl
*free_space_ctl
;
636 /* block group cache stuff */
637 struct rb_node cache_node
;
639 /* for block groups in the same raid type */
640 struct list_head list
;
645 /* List of struct btrfs_free_clusters for this block group.
646 * Today it will only have one thing on it, but that may change
648 struct list_head cluster_list
;
650 /* For delayed block group creation or deletion of empty block groups */
651 struct list_head bg_list
;
653 /* For read-only block groups */
654 struct list_head ro_list
;
658 /* For dirty block groups */
659 struct list_head dirty_list
;
660 struct list_head io_list
;
662 struct btrfs_io_ctl io_ctl
;
665 * Incremented when doing extent allocations and holding a read lock
666 * on the space_info's groups_sem semaphore.
667 * Decremented when an ordered extent that represents an IO against this
668 * block group's range is created (after it's added to its inode's
669 * root's list of ordered extents) or immediately after the allocation
670 * if it's a metadata extent or fallocate extent (for these cases we
671 * don't create ordered extents).
673 atomic_t reservations
;
676 * Incremented while holding the spinlock *lock* by a task checking if
677 * it can perform a nocow write (incremented if the value for the *ro*
678 * field is 0). Decremented by such tasks once they create an ordered
679 * extent or before that if some error happens before reaching that step.
680 * This is to prevent races between block group relocation and nocow
681 * writes through direct IO.
683 atomic_t nocow_writers
;
685 /* Lock for free space tree operations. */
686 struct mutex free_space_lock
;
689 * Does the block group need to be added to the free space tree?
690 * Protected by free_space_lock.
692 int needs_free_space
;
694 /* Record locked full stripes for RAID5/6 block group */
695 struct btrfs_full_stripe_locks_tree full_stripe_locks_root
;
698 /* delayed seq elem */
700 struct list_head list
;
704 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
706 #define SEQ_LAST ((u64)-1)
708 enum btrfs_orphan_cleanup_state
{
709 ORPHAN_CLEANUP_STARTED
= 1,
710 ORPHAN_CLEANUP_DONE
= 2,
713 /* used by the raid56 code to lock stripes for read/modify/write */
714 struct btrfs_stripe_hash
{
715 struct list_head hash_list
;
719 /* used by the raid56 code to lock stripes for read/modify/write */
720 struct btrfs_stripe_hash_table
{
721 struct list_head stripe_cache
;
722 spinlock_t cache_lock
;
724 struct btrfs_stripe_hash table
[];
727 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
729 void btrfs_init_async_reclaim_work(struct work_struct
*work
);
732 struct reloc_control
;
734 struct btrfs_fs_devices
;
735 struct btrfs_balance_control
;
736 struct btrfs_delayed_root
;
739 * Block group or device which contains an active swapfile. Used for preventing
740 * unsafe operations while a swapfile is active.
742 * These are sorted on (ptr, inode) (note that a block group or device can
743 * contain more than one swapfile). We compare the pointer values because we
744 * don't actually care what the object is, we just need a quick check whether
745 * the object exists in the rbtree.
747 struct btrfs_swapfile_pin
{
752 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
753 * ptr points to a struct btrfs_device.
758 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info
*fs_info
, void *ptr
);
762 BTRFS_FS_CLOSING_START
,
763 BTRFS_FS_CLOSING_DONE
,
764 BTRFS_FS_LOG_RECOVERING
,
766 BTRFS_FS_QUOTA_ENABLED
,
767 BTRFS_FS_UPDATE_UUID_TREE_GEN
,
768 BTRFS_FS_CREATING_FREE_SPACE_TREE
,
772 BTRFS_FS_QUOTA_OVERRIDE
,
773 /* Used to record internally whether fs has been frozen */
776 * Indicate that a whole-filesystem exclusive operation is running
777 * (device replace, resize, device add/delete, balance)
781 * To info transaction_kthread we need an immediate commit so it
782 * doesn't need to wait for commit_interval
784 BTRFS_FS_NEED_ASYNC_COMMIT
,
786 * Indicate that balance has been set up from the ioctl and is in the
787 * main phase. The fs_info::balance_ctl is initialized.
789 BTRFS_FS_BALANCE_RUNNING
,
791 /* Indicate that the cleaner thread is awake and doing something. */
792 BTRFS_FS_CLEANER_RUNNING
,
795 struct btrfs_fs_info
{
796 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
798 struct btrfs_root
*extent_root
;
799 struct btrfs_root
*tree_root
;
800 struct btrfs_root
*chunk_root
;
801 struct btrfs_root
*dev_root
;
802 struct btrfs_root
*fs_root
;
803 struct btrfs_root
*csum_root
;
804 struct btrfs_root
*quota_root
;
805 struct btrfs_root
*uuid_root
;
806 struct btrfs_root
*free_space_root
;
808 /* the log root tree is a directory of all the other log roots */
809 struct btrfs_root
*log_root_tree
;
811 spinlock_t fs_roots_radix_lock
;
812 struct radix_tree_root fs_roots_radix
;
814 /* block group cache stuff */
815 spinlock_t block_group_cache_lock
;
816 u64 first_logical_byte
;
817 struct rb_root block_group_cache_tree
;
819 /* keep track of unallocated space */
820 atomic64_t free_chunk_space
;
822 struct extent_io_tree freed_extents
[2];
823 struct extent_io_tree
*pinned_extents
;
825 /* logical->physical extent mapping */
826 struct btrfs_mapping_tree mapping_tree
;
829 * block reservation for extent, checksum, root tree and
830 * delayed dir index item
832 struct btrfs_block_rsv global_block_rsv
;
833 /* block reservation for metadata operations */
834 struct btrfs_block_rsv trans_block_rsv
;
835 /* block reservation for chunk tree */
836 struct btrfs_block_rsv chunk_block_rsv
;
837 /* block reservation for delayed operations */
838 struct btrfs_block_rsv delayed_block_rsv
;
839 /* block reservation for delayed refs */
840 struct btrfs_block_rsv delayed_refs_rsv
;
842 struct btrfs_block_rsv empty_block_rsv
;
845 u64 last_trans_committed
;
846 u64 avg_delayed_ref_runtime
;
849 * this is updated to the current trans every time a full commit
850 * is required instead of the faster short fsync log commits
852 u64 last_trans_log_full_commit
;
853 unsigned long mount_opt
;
855 * Track requests for actions that need to be done during transaction
856 * commit (like for some mount options).
858 unsigned long pending_changes
;
859 unsigned long compress_type
:4;
860 unsigned int compress_level
;
863 * It is a suggestive number, the read side is safe even it gets a
864 * wrong number because we will write out the data into a regular
865 * extent. The write side(mount/remount) is under ->s_umount lock,
866 * so it is also safe.
870 struct btrfs_transaction
*running_transaction
;
871 wait_queue_head_t transaction_throttle
;
872 wait_queue_head_t transaction_wait
;
873 wait_queue_head_t transaction_blocked_wait
;
874 wait_queue_head_t async_submit_wait
;
877 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
878 * when they are updated.
880 * Because we do not clear the flags for ever, so we needn't use
881 * the lock on the read side.
883 * We also needn't use the lock when we mount the fs, because
884 * there is no other task which will update the flag.
886 spinlock_t super_lock
;
887 struct btrfs_super_block
*super_copy
;
888 struct btrfs_super_block
*super_for_commit
;
889 struct super_block
*sb
;
890 struct inode
*btree_inode
;
891 struct mutex tree_log_mutex
;
892 struct mutex transaction_kthread_mutex
;
893 struct mutex cleaner_mutex
;
894 struct mutex chunk_mutex
;
897 * this is taken to make sure we don't set block groups ro after
898 * the free space cache has been allocated on them
900 struct mutex ro_block_group_mutex
;
902 /* this is used during read/modify/write to make sure
903 * no two ios are trying to mod the same stripe at the same
906 struct btrfs_stripe_hash_table
*stripe_hash_table
;
909 * this protects the ordered operations list only while we are
910 * processing all of the entries on it. This way we make
911 * sure the commit code doesn't find the list temporarily empty
912 * because another function happens to be doing non-waiting preflush
913 * before jumping into the main commit.
915 struct mutex ordered_operations_mutex
;
917 struct rw_semaphore commit_root_sem
;
919 struct rw_semaphore cleanup_work_sem
;
921 struct rw_semaphore subvol_sem
;
922 struct srcu_struct subvol_srcu
;
924 spinlock_t trans_lock
;
926 * the reloc mutex goes with the trans lock, it is taken
927 * during commit to protect us from the relocation code
929 struct mutex reloc_mutex
;
931 struct list_head trans_list
;
932 struct list_head dead_roots
;
933 struct list_head caching_block_groups
;
935 spinlock_t delayed_iput_lock
;
936 struct list_head delayed_iputs
;
937 atomic_t nr_delayed_iputs
;
938 wait_queue_head_t delayed_iputs_wait
;
940 /* this protects tree_mod_seq_list */
941 spinlock_t tree_mod_seq_lock
;
942 atomic64_t tree_mod_seq
;
943 struct list_head tree_mod_seq_list
;
945 /* this protects tree_mod_log */
946 rwlock_t tree_mod_log_lock
;
947 struct rb_root tree_mod_log
;
949 atomic_t async_delalloc_pages
;
952 * this is used to protect the following list -- ordered_roots.
954 spinlock_t ordered_root_lock
;
957 * all fs/file tree roots in which there are data=ordered extents
958 * pending writeback are added into this list.
960 * these can span multiple transactions and basically include
961 * every dirty data page that isn't from nodatacow
963 struct list_head ordered_roots
;
965 struct mutex delalloc_root_mutex
;
966 spinlock_t delalloc_root_lock
;
967 /* all fs/file tree roots that have delalloc inodes. */
968 struct list_head delalloc_roots
;
971 * there is a pool of worker threads for checksumming during writes
972 * and a pool for checksumming after reads. This is because readers
973 * can run with FS locks held, and the writers may be waiting for
974 * those locks. We don't want ordering in the pending list to cause
975 * deadlocks, and so the two are serviced separately.
977 * A third pool does submit_bio to avoid deadlocking with the other
980 struct btrfs_workqueue
*workers
;
981 struct btrfs_workqueue
*delalloc_workers
;
982 struct btrfs_workqueue
*flush_workers
;
983 struct btrfs_workqueue
*endio_workers
;
984 struct btrfs_workqueue
*endio_meta_workers
;
985 struct btrfs_workqueue
*endio_raid56_workers
;
986 struct btrfs_workqueue
*endio_repair_workers
;
987 struct btrfs_workqueue
*rmw_workers
;
988 struct btrfs_workqueue
*endio_meta_write_workers
;
989 struct btrfs_workqueue
*endio_write_workers
;
990 struct btrfs_workqueue
*endio_freespace_worker
;
991 struct btrfs_workqueue
*submit_workers
;
992 struct btrfs_workqueue
*caching_workers
;
993 struct btrfs_workqueue
*readahead_workers
;
996 * fixup workers take dirty pages that didn't properly go through
997 * the cow mechanism and make them safe to write. It happens
998 * for the sys_munmap function call path
1000 struct btrfs_workqueue
*fixup_workers
;
1001 struct btrfs_workqueue
*delayed_workers
;
1003 /* the extent workers do delayed refs on the extent allocation tree */
1004 struct btrfs_workqueue
*extent_workers
;
1005 struct task_struct
*transaction_kthread
;
1006 struct task_struct
*cleaner_kthread
;
1007 u32 thread_pool_size
;
1009 struct kobject
*space_info_kobj
;
1010 struct list_head pending_raid_kobjs
;
1011 spinlock_t pending_raid_kobjs_lock
; /* uncontended */
1015 /* used to keep from writing metadata until there is a nice batch */
1016 struct percpu_counter dirty_metadata_bytes
;
1017 struct percpu_counter delalloc_bytes
;
1018 s32 dirty_metadata_batch
;
1021 struct list_head dirty_cowonly_roots
;
1023 struct btrfs_fs_devices
*fs_devices
;
1026 * The space_info list is effectively read only after initial
1027 * setup. It is populated at mount time and cleaned up after
1028 * all block groups are removed. RCU is used to protect it.
1030 struct list_head space_info
;
1032 struct btrfs_space_info
*data_sinfo
;
1034 struct reloc_control
*reloc_ctl
;
1036 /* data_alloc_cluster is only used in ssd_spread mode */
1037 struct btrfs_free_cluster data_alloc_cluster
;
1039 /* all metadata allocations go through this cluster */
1040 struct btrfs_free_cluster meta_alloc_cluster
;
1042 /* auto defrag inodes go here */
1043 spinlock_t defrag_inodes_lock
;
1044 struct rb_root defrag_inodes
;
1045 atomic_t defrag_running
;
1047 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1048 seqlock_t profiles_lock
;
1050 * these three are in extended format (availability of single
1051 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1052 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1054 u64 avail_data_alloc_bits
;
1055 u64 avail_metadata_alloc_bits
;
1056 u64 avail_system_alloc_bits
;
1058 /* restriper state */
1059 spinlock_t balance_lock
;
1060 struct mutex balance_mutex
;
1061 atomic_t balance_pause_req
;
1062 atomic_t balance_cancel_req
;
1063 struct btrfs_balance_control
*balance_ctl
;
1064 wait_queue_head_t balance_wait_q
;
1066 u32 data_chunk_allocations
;
1071 /* private scrub information */
1072 struct mutex scrub_lock
;
1073 atomic_t scrubs_running
;
1074 atomic_t scrub_pause_req
;
1075 atomic_t scrubs_paused
;
1076 atomic_t scrub_cancel_req
;
1077 wait_queue_head_t scrub_pause_wait
;
1079 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
1082 refcount_t scrub_workers_refcnt
;
1083 struct btrfs_workqueue
*scrub_workers
;
1084 struct btrfs_workqueue
*scrub_wr_completion_workers
;
1085 struct btrfs_workqueue
*scrub_parity_workers
;
1087 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1088 u32 check_integrity_print_mask
;
1090 /* is qgroup tracking in a consistent state? */
1093 /* holds configuration and tracking. Protected by qgroup_lock */
1094 struct rb_root qgroup_tree
;
1095 struct rb_root qgroup_op_tree
;
1096 spinlock_t qgroup_lock
;
1097 spinlock_t qgroup_op_lock
;
1098 atomic_t qgroup_op_seq
;
1101 * used to avoid frequently calling ulist_alloc()/ulist_free()
1102 * when doing qgroup accounting, it must be protected by qgroup_lock.
1104 struct ulist
*qgroup_ulist
;
1106 /* protect user change for quota operations */
1107 struct mutex qgroup_ioctl_lock
;
1109 /* list of dirty qgroups to be written at next commit */
1110 struct list_head dirty_qgroups
;
1112 /* used by qgroup for an efficient tree traversal */
1115 /* qgroup rescan items */
1116 struct mutex qgroup_rescan_lock
; /* protects the progress item */
1117 struct btrfs_key qgroup_rescan_progress
;
1118 struct btrfs_workqueue
*qgroup_rescan_workers
;
1119 struct completion qgroup_rescan_completion
;
1120 struct btrfs_work qgroup_rescan_work
;
1121 bool qgroup_rescan_running
; /* protected by qgroup_rescan_lock */
1123 /* filesystem state */
1124 unsigned long fs_state
;
1126 struct btrfs_delayed_root
*delayed_root
;
1128 /* readahead tree */
1129 spinlock_t reada_lock
;
1130 struct radix_tree_root reada_tree
;
1132 /* readahead works cnt */
1133 atomic_t reada_works_cnt
;
1135 /* Extent buffer radix tree */
1136 spinlock_t buffer_lock
;
1137 struct radix_tree_root buffer_radix
;
1139 /* next backup root to be overwritten */
1140 int backup_root_index
;
1142 /* device replace state */
1143 struct btrfs_dev_replace dev_replace
;
1145 struct semaphore uuid_tree_rescan_sem
;
1147 /* Used to reclaim the metadata space in the background. */
1148 struct work_struct async_reclaim_work
;
1150 spinlock_t unused_bgs_lock
;
1151 struct list_head unused_bgs
;
1152 struct mutex unused_bg_unpin_mutex
;
1153 struct mutex delete_unused_bgs_mutex
;
1156 * Chunks that can't be freed yet (under a trim/discard operation)
1157 * and will be latter freed. Protected by fs_info->chunk_mutex.
1159 struct list_head pinned_chunks
;
1161 /* Cached block sizes */
1166 /* Block groups and devices containing active swapfiles. */
1167 spinlock_t swapfile_pins_lock
;
1168 struct rb_root swapfile_pins
;
1170 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1171 spinlock_t ref_verify_lock
;
1172 struct rb_root block_tree
;
1176 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
1178 return sb
->s_fs_info
;
1181 struct btrfs_subvolume_writers
{
1182 struct percpu_counter counter
;
1183 wait_queue_head_t wait
;
1187 * The state of btrfs root
1191 * btrfs_record_root_in_trans is a multi-step process, and it can race
1192 * with the balancing code. But the race is very small, and only the
1193 * first time the root is added to each transaction. So IN_TRANS_SETUP
1194 * is used to tell us when more checks are required
1196 BTRFS_ROOT_IN_TRANS_SETUP
,
1197 BTRFS_ROOT_REF_COWS
,
1198 BTRFS_ROOT_TRACK_DIRTY
,
1199 BTRFS_ROOT_IN_RADIX
,
1200 BTRFS_ROOT_ORPHAN_ITEM_INSERTED
,
1201 BTRFS_ROOT_DEFRAG_RUNNING
,
1202 BTRFS_ROOT_FORCE_COW
,
1203 BTRFS_ROOT_MULTI_LOG_TASKS
,
1205 BTRFS_ROOT_DELETING
,
1208 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1210 * Set for the subvolume tree owning the reloc tree.
1212 BTRFS_ROOT_DEAD_RELOC_TREE
,
1213 /* Mark dead root stored on device whose cleanup needs to be resumed */
1214 BTRFS_ROOT_DEAD_TREE
,
1218 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1219 * code. For detail check comment in fs/btrfs/qgroup.c.
1221 struct btrfs_qgroup_swapped_blocks
{
1223 /* RM_EMPTY_ROOT() of above blocks[] */
1225 struct rb_root blocks
[BTRFS_MAX_LEVEL
];
1229 * in ram representation of the tree. extent_root is used for all allocations
1230 * and for the extent tree extent_root root.
1233 struct extent_buffer
*node
;
1235 struct extent_buffer
*commit_root
;
1236 struct btrfs_root
*log_root
;
1237 struct btrfs_root
*reloc_root
;
1239 unsigned long state
;
1240 struct btrfs_root_item root_item
;
1241 struct btrfs_key root_key
;
1242 struct btrfs_fs_info
*fs_info
;
1243 struct extent_io_tree dirty_log_pages
;
1245 struct mutex objectid_mutex
;
1247 spinlock_t accounting_lock
;
1248 struct btrfs_block_rsv
*block_rsv
;
1250 /* free ino cache stuff */
1251 struct btrfs_free_space_ctl
*free_ino_ctl
;
1252 enum btrfs_caching_type ino_cache_state
;
1253 spinlock_t ino_cache_lock
;
1254 wait_queue_head_t ino_cache_wait
;
1255 struct btrfs_free_space_ctl
*free_ino_pinned
;
1256 u64 ino_cache_progress
;
1257 struct inode
*ino_cache_inode
;
1259 struct mutex log_mutex
;
1260 wait_queue_head_t log_writer_wait
;
1261 wait_queue_head_t log_commit_wait
[2];
1262 struct list_head log_ctxs
[2];
1263 atomic_t log_writers
;
1264 atomic_t log_commit
[2];
1267 /* No matter the commit succeeds or not*/
1268 int log_transid_committed
;
1269 /* Just be updated when the commit succeeds. */
1270 int last_log_commit
;
1271 pid_t log_start_pid
;
1277 u64 highest_objectid
;
1279 u64 defrag_trans_start
;
1280 struct btrfs_key defrag_progress
;
1281 struct btrfs_key defrag_max
;
1283 /* the dirty list is only used by non-reference counted roots */
1284 struct list_head dirty_list
;
1286 struct list_head root_list
;
1288 spinlock_t log_extents_lock
[2];
1289 struct list_head logged_list
[2];
1291 int orphan_cleanup_state
;
1293 spinlock_t inode_lock
;
1294 /* red-black tree that keeps track of in-memory inodes */
1295 struct rb_root inode_tree
;
1298 * radix tree that keeps track of delayed nodes of every inode,
1299 * protected by inode_lock
1301 struct radix_tree_root delayed_nodes_tree
;
1303 * right now this just gets used so that a root has its own devid
1304 * for stat. It may be used for more later
1308 spinlock_t root_item_lock
;
1311 struct mutex delalloc_mutex
;
1312 spinlock_t delalloc_lock
;
1314 * all of the inodes that have delalloc bytes. It is possible for
1315 * this list to be empty even when there is still dirty data=ordered
1316 * extents waiting to finish IO.
1318 struct list_head delalloc_inodes
;
1319 struct list_head delalloc_root
;
1320 u64 nr_delalloc_inodes
;
1322 struct mutex ordered_extent_mutex
;
1324 * this is used by the balancing code to wait for all the pending
1327 spinlock_t ordered_extent_lock
;
1330 * all of the data=ordered extents pending writeback
1331 * these can span multiple transactions and basically include
1332 * every dirty data page that isn't from nodatacow
1334 struct list_head ordered_extents
;
1335 struct list_head ordered_root
;
1336 u64 nr_ordered_extents
;
1339 * Not empty if this subvolume root has gone through tree block swap
1342 * Will be used by reloc_control::dirty_subvol_roots.
1344 struct list_head reloc_dirty_list
;
1347 * Number of currently running SEND ioctls to prevent
1348 * manipulation with the read-only status via SUBVOL_SETFLAGS
1350 int send_in_progress
;
1351 struct btrfs_subvolume_writers
*subv_writers
;
1352 atomic_t will_be_snapshotted
;
1353 atomic_t snapshot_force_cow
;
1355 /* For qgroup metadata reserved space */
1356 spinlock_t qgroup_meta_rsv_lock
;
1357 u64 qgroup_meta_rsv_pertrans
;
1358 u64 qgroup_meta_rsv_prealloc
;
1360 /* Number of active swapfiles */
1361 atomic_t nr_swapfiles
;
1363 /* Record pairs of swapped blocks for qgroup */
1364 struct btrfs_qgroup_swapped_blocks swapped_blocks
;
1366 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1371 struct btrfs_file_private
{
1375 static inline u32
btrfs_inode_sectorsize(const struct inode
*inode
)
1377 return btrfs_sb(inode
->i_sb
)->sectorsize
;
1380 static inline u32
BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info
*info
)
1383 return info
->nodesize
- sizeof(struct btrfs_header
);
1386 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1388 static inline u32
BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info
*info
)
1390 return BTRFS_LEAF_DATA_SIZE(info
) - sizeof(struct btrfs_item
);
1393 static inline u32
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info
*info
)
1395 return BTRFS_LEAF_DATA_SIZE(info
) / sizeof(struct btrfs_key_ptr
);
1398 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1399 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1400 static inline u32
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info
*info
)
1402 return BTRFS_MAX_ITEM_SIZE(info
) -
1403 BTRFS_FILE_EXTENT_INLINE_DATA_START
;
1406 static inline u32
BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info
*info
)
1408 return BTRFS_MAX_ITEM_SIZE(info
) - sizeof(struct btrfs_dir_item
);
1412 * Flags for mount options.
1414 * Note: don't forget to add new options to btrfs_show_options()
1416 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1417 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1418 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1419 #define BTRFS_MOUNT_SSD (1 << 3)
1420 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1421 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1422 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1423 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1424 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1425 #define BTRFS_MOUNT_NOSSD (1 << 9)
1426 #define BTRFS_MOUNT_DISCARD (1 << 10)
1427 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1428 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1429 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1430 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1431 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1432 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1433 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1434 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1435 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1436 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1437 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1438 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1439 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1440 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1441 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1442 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1443 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1444 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1446 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1447 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1449 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1450 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1451 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1452 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1455 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1457 if (!btrfs_test_opt(fs_info, opt)) \
1458 btrfs_info(fs_info, fmt, ##args); \
1459 btrfs_set_opt(fs_info->mount_opt, opt); \
1462 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1464 if (btrfs_test_opt(fs_info, opt)) \
1465 btrfs_info(fs_info, fmt, ##args); \
1466 btrfs_clear_opt(fs_info->mount_opt, opt); \
1469 #ifdef CONFIG_BTRFS_DEBUG
1471 btrfs_should_fragment_free_space(struct btrfs_block_group_cache
*block_group
)
1473 struct btrfs_fs_info
*fs_info
= block_group
->fs_info
;
1475 return (btrfs_test_opt(fs_info
, FRAGMENT_METADATA
) &&
1476 block_group
->flags
& BTRFS_BLOCK_GROUP_METADATA
) ||
1477 (btrfs_test_opt(fs_info
, FRAGMENT_DATA
) &&
1478 block_group
->flags
& BTRFS_BLOCK_GROUP_DATA
);
1483 * Requests for changes that need to be done during transaction commit.
1485 * Internal mount options that are used for special handling of the real
1486 * mount options (eg. cannot be set during remount and have to be set during
1487 * transaction commit)
1490 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1491 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1492 #define BTRFS_PENDING_COMMIT (2)
1494 #define btrfs_test_pending(info, opt) \
1495 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1496 #define btrfs_set_pending(info, opt) \
1497 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1498 #define btrfs_clear_pending(info, opt) \
1499 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1502 * Helpers for setting pending mount option changes.
1504 * Expects corresponding macros
1505 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1507 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1509 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1510 btrfs_info((info), fmt, ##args); \
1511 btrfs_set_pending((info), SET_##opt); \
1512 btrfs_clear_pending((info), CLEAR_##opt); \
1516 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1518 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1519 btrfs_info((info), fmt, ##args); \
1520 btrfs_set_pending((info), CLEAR_##opt); \
1521 btrfs_clear_pending((info), SET_##opt); \
1528 #define BTRFS_INODE_NODATASUM (1 << 0)
1529 #define BTRFS_INODE_NODATACOW (1 << 1)
1530 #define BTRFS_INODE_READONLY (1 << 2)
1531 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1532 #define BTRFS_INODE_PREALLOC (1 << 4)
1533 #define BTRFS_INODE_SYNC (1 << 5)
1534 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1535 #define BTRFS_INODE_APPEND (1 << 7)
1536 #define BTRFS_INODE_NODUMP (1 << 8)
1537 #define BTRFS_INODE_NOATIME (1 << 9)
1538 #define BTRFS_INODE_DIRSYNC (1 << 10)
1539 #define BTRFS_INODE_COMPRESS (1 << 11)
1541 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1543 struct btrfs_map_token
{
1544 const struct extent_buffer
*eb
;
1546 unsigned long offset
;
1549 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1550 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1552 static inline void btrfs_init_map_token (struct btrfs_map_token
*token
)
1554 token
->kaddr
= NULL
;
1557 /* some macros to generate set/get functions for the struct fields. This
1558 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1561 #define le8_to_cpu(v) (v)
1562 #define cpu_to_le8(v) (v)
1565 #define read_eb_member(eb, ptr, type, member, result) (\
1566 read_extent_buffer(eb, (char *)(result), \
1567 ((unsigned long)(ptr)) + \
1568 offsetof(type, member), \
1569 sizeof(((type *)0)->member)))
1571 #define write_eb_member(eb, ptr, type, member, result) (\
1572 write_extent_buffer(eb, (char *)(result), \
1573 ((unsigned long)(ptr)) + \
1574 offsetof(type, member), \
1575 sizeof(((type *)0)->member)))
1577 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1578 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1579 const void *ptr, unsigned long off, \
1580 struct btrfs_map_token *token); \
1581 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1582 unsigned long off, u##bits val, \
1583 struct btrfs_map_token *token); \
1584 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1586 unsigned long off) \
1588 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1590 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1591 unsigned long off, u##bits val) \
1593 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1596 DECLARE_BTRFS_SETGET_BITS(8)
1597 DECLARE_BTRFS_SETGET_BITS(16)
1598 DECLARE_BTRFS_SETGET_BITS(32)
1599 DECLARE_BTRFS_SETGET_BITS(64)
1601 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1602 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1605 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1606 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1608 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1611 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1612 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1614 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1616 struct btrfs_map_token *token) \
1618 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1619 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1621 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1622 type *s, u##bits val, \
1623 struct btrfs_map_token *token) \
1625 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1626 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1629 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1630 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1632 const type *p = page_address(eb->pages[0]); \
1633 u##bits res = le##bits##_to_cpu(p->member); \
1636 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1639 type *p = page_address(eb->pages[0]); \
1640 p->member = cpu_to_le##bits(val); \
1643 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1644 static inline u##bits btrfs_##name(const type *s) \
1646 return le##bits##_to_cpu(s->member); \
1648 static inline void btrfs_set_##name(type *s, u##bits val) \
1650 s->member = cpu_to_le##bits(val); \
1654 static inline u64
btrfs_device_total_bytes(struct extent_buffer
*eb
,
1655 struct btrfs_dev_item
*s
)
1657 BUILD_BUG_ON(sizeof(u64
) !=
1658 sizeof(((struct btrfs_dev_item
*)0))->total_bytes
);
1659 return btrfs_get_64(eb
, s
, offsetof(struct btrfs_dev_item
,
1662 static inline void btrfs_set_device_total_bytes(struct extent_buffer
*eb
,
1663 struct btrfs_dev_item
*s
,
1666 BUILD_BUG_ON(sizeof(u64
) !=
1667 sizeof(((struct btrfs_dev_item
*)0))->total_bytes
);
1668 WARN_ON(!IS_ALIGNED(val
, eb
->fs_info
->sectorsize
));
1669 btrfs_set_64(eb
, s
, offsetof(struct btrfs_dev_item
, total_bytes
), val
);
1673 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1674 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1675 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1676 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1677 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1679 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1680 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1681 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1682 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1683 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1684 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1686 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1687 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1689 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1691 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1693 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1695 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1697 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1698 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1700 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1702 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1704 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1707 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1709 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1712 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1714 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1717 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1718 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1719 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1720 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1721 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1722 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1723 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1724 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1725 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1726 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1727 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1729 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1731 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1734 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1735 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1736 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1738 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1740 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1742 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1744 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1745 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1747 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1749 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1750 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1752 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1755 unsigned long offset
= (unsigned long)c
;
1756 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1757 offset
+= nr
* sizeof(struct btrfs_stripe
);
1758 return (struct btrfs_stripe
*)offset
;
1761 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1763 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1766 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1767 struct btrfs_chunk
*c
, int nr
)
1769 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1772 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1773 struct btrfs_chunk
*c
, int nr
)
1775 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1778 /* struct btrfs_block_group_item */
1779 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1781 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1783 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1784 struct btrfs_block_group_item
, chunk_objectid
, 64);
1786 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1787 struct btrfs_block_group_item
, chunk_objectid
, 64);
1788 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1789 struct btrfs_block_group_item
, flags
, 64);
1790 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1791 struct btrfs_block_group_item
, flags
, 64);
1793 /* struct btrfs_free_space_info */
1794 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1796 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1798 /* struct btrfs_inode_ref */
1799 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1800 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1802 /* struct btrfs_inode_extref */
1803 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1804 parent_objectid
, 64);
1805 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1807 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1809 /* struct btrfs_inode_item */
1810 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1811 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1812 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1813 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1814 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1815 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1816 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1817 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1818 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1819 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1820 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1821 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1822 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1824 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1826 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1828 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1829 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1831 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1833 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1834 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1835 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1836 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1837 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1838 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1839 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1840 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1841 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1842 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1844 /* struct btrfs_dev_extent */
1845 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1847 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1848 chunk_objectid
, 64);
1849 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1851 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1853 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1855 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1856 return (unsigned long)dev
+ ptr
;
1859 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1860 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1862 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1864 BTRFS_SETGET_FUNCS(extent_refs_v0
, struct btrfs_extent_item_v0
, refs
, 32);
1867 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1869 static inline void btrfs_tree_block_key(struct extent_buffer
*eb
,
1870 struct btrfs_tree_block_info
*item
,
1871 struct btrfs_disk_key
*key
)
1873 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1876 static inline void btrfs_set_tree_block_key(struct extent_buffer
*eb
,
1877 struct btrfs_tree_block_info
*item
,
1878 struct btrfs_disk_key
*key
)
1880 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1883 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1885 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1887 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1889 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1892 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1895 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1897 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1900 static inline u32
btrfs_extent_inline_ref_size(int type
)
1902 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1903 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1904 return sizeof(struct btrfs_extent_inline_ref
);
1905 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1906 return sizeof(struct btrfs_shared_data_ref
) +
1907 sizeof(struct btrfs_extent_inline_ref
);
1908 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1909 return sizeof(struct btrfs_extent_data_ref
) +
1910 offsetof(struct btrfs_extent_inline_ref
, offset
);
1914 BTRFS_SETGET_FUNCS(ref_root_v0
, struct btrfs_extent_ref_v0
, root
, 64);
1915 BTRFS_SETGET_FUNCS(ref_generation_v0
, struct btrfs_extent_ref_v0
,
1917 BTRFS_SETGET_FUNCS(ref_objectid_v0
, struct btrfs_extent_ref_v0
, objectid
, 64);
1918 BTRFS_SETGET_FUNCS(ref_count_v0
, struct btrfs_extent_ref_v0
, count
, 32);
1920 /* struct btrfs_node */
1921 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1922 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1923 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1925 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1928 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1931 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1932 sizeof(struct btrfs_key_ptr
) * nr
;
1933 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1936 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1940 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1941 sizeof(struct btrfs_key_ptr
) * nr
;
1942 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1945 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1948 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1949 sizeof(struct btrfs_key_ptr
) * nr
;
1950 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1953 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1957 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1958 sizeof(struct btrfs_key_ptr
) * nr
;
1959 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1962 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1964 return offsetof(struct btrfs_node
, ptrs
) +
1965 sizeof(struct btrfs_key_ptr
) * nr
;
1968 void btrfs_node_key(const struct extent_buffer
*eb
,
1969 struct btrfs_disk_key
*disk_key
, int nr
);
1971 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1972 struct btrfs_disk_key
*disk_key
, int nr
)
1975 ptr
= btrfs_node_key_ptr_offset(nr
);
1976 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1977 struct btrfs_key_ptr
, key
, disk_key
);
1980 /* struct btrfs_item */
1981 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1982 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1983 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1984 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1986 static inline unsigned long btrfs_item_nr_offset(int nr
)
1988 return offsetof(struct btrfs_leaf
, items
) +
1989 sizeof(struct btrfs_item
) * nr
;
1992 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1994 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1997 static inline u32
btrfs_item_end(const struct extent_buffer
*eb
,
1998 struct btrfs_item
*item
)
2000 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
2003 static inline u32
btrfs_item_end_nr(const struct extent_buffer
*eb
, int nr
)
2005 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
2008 static inline u32
btrfs_item_offset_nr(const struct extent_buffer
*eb
, int nr
)
2010 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
2013 static inline u32
btrfs_item_size_nr(const struct extent_buffer
*eb
, int nr
)
2015 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
2018 static inline void btrfs_item_key(const struct extent_buffer
*eb
,
2019 struct btrfs_disk_key
*disk_key
, int nr
)
2021 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2022 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2025 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2026 struct btrfs_disk_key
*disk_key
, int nr
)
2028 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2029 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2032 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2035 * struct btrfs_root_ref
2037 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2038 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2039 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2041 /* struct btrfs_dir_item */
2042 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2043 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2044 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2045 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2046 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2047 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2049 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2051 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2054 static inline void btrfs_dir_item_key(const struct extent_buffer
*eb
,
2055 const struct btrfs_dir_item
*item
,
2056 struct btrfs_disk_key
*key
)
2058 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2061 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2062 struct btrfs_dir_item
*item
,
2063 const struct btrfs_disk_key
*key
)
2065 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2068 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2070 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2072 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2075 static inline void btrfs_free_space_key(const struct extent_buffer
*eb
,
2076 const struct btrfs_free_space_header
*h
,
2077 struct btrfs_disk_key
*key
)
2079 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2082 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2083 struct btrfs_free_space_header
*h
,
2084 const struct btrfs_disk_key
*key
)
2086 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2089 /* struct btrfs_disk_key */
2090 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2092 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2093 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2095 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2096 const struct btrfs_disk_key
*disk
)
2098 cpu
->offset
= le64_to_cpu(disk
->offset
);
2099 cpu
->type
= disk
->type
;
2100 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2103 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2104 const struct btrfs_key
*cpu
)
2106 disk
->offset
= cpu_to_le64(cpu
->offset
);
2107 disk
->type
= cpu
->type
;
2108 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2111 static inline void btrfs_node_key_to_cpu(const struct extent_buffer
*eb
,
2112 struct btrfs_key
*key
, int nr
)
2114 struct btrfs_disk_key disk_key
;
2115 btrfs_node_key(eb
, &disk_key
, nr
);
2116 btrfs_disk_key_to_cpu(key
, &disk_key
);
2119 static inline void btrfs_item_key_to_cpu(const struct extent_buffer
*eb
,
2120 struct btrfs_key
*key
, int nr
)
2122 struct btrfs_disk_key disk_key
;
2123 btrfs_item_key(eb
, &disk_key
, nr
);
2124 btrfs_disk_key_to_cpu(key
, &disk_key
);
2127 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer
*eb
,
2128 const struct btrfs_dir_item
*item
,
2129 struct btrfs_key
*key
)
2131 struct btrfs_disk_key disk_key
;
2132 btrfs_dir_item_key(eb
, item
, &disk_key
);
2133 btrfs_disk_key_to_cpu(key
, &disk_key
);
2136 static inline u8
btrfs_key_type(const struct btrfs_key
*key
)
2141 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
2146 /* struct btrfs_header */
2147 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2148 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2150 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2151 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2152 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2153 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2154 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2156 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2157 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2159 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2161 static inline int btrfs_header_flag(const struct extent_buffer
*eb
, u64 flag
)
2163 return (btrfs_header_flags(eb
) & flag
) == flag
;
2166 static inline void btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2168 u64 flags
= btrfs_header_flags(eb
);
2169 btrfs_set_header_flags(eb
, flags
| flag
);
2172 static inline void btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2174 u64 flags
= btrfs_header_flags(eb
);
2175 btrfs_set_header_flags(eb
, flags
& ~flag
);
2178 static inline int btrfs_header_backref_rev(const struct extent_buffer
*eb
)
2180 u64 flags
= btrfs_header_flags(eb
);
2181 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2184 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2187 u64 flags
= btrfs_header_flags(eb
);
2188 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2189 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2190 btrfs_set_header_flags(eb
, flags
);
2193 static inline unsigned long btrfs_header_fsid(void)
2195 return offsetof(struct btrfs_header
, fsid
);
2198 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer
*eb
)
2200 return offsetof(struct btrfs_header
, chunk_tree_uuid
);
2203 static inline int btrfs_is_leaf(const struct extent_buffer
*eb
)
2205 return btrfs_header_level(eb
) == 0;
2208 /* struct btrfs_root_item */
2209 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2211 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2212 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2213 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2215 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2217 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2218 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2219 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2220 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2221 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2222 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2223 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2224 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2226 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2228 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2230 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2232 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2234 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2237 static inline bool btrfs_root_readonly(const struct btrfs_root
*root
)
2239 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2242 static inline bool btrfs_root_dead(const struct btrfs_root
*root
)
2244 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2247 /* struct btrfs_root_backup */
2248 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2250 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2252 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2253 tree_root_level
, 8);
2255 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2257 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2258 chunk_root_gen
, 64);
2259 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2260 chunk_root_level
, 8);
2262 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2264 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2265 extent_root_gen
, 64);
2266 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2267 extent_root_level
, 8);
2269 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2271 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2273 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2276 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2278 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2280 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2283 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2285 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2287 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2288 csum_root_level
, 8);
2289 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2291 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2293 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2296 /* struct btrfs_balance_item */
2297 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2299 static inline void btrfs_balance_data(const struct extent_buffer
*eb
,
2300 const struct btrfs_balance_item
*bi
,
2301 struct btrfs_disk_balance_args
*ba
)
2303 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2306 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2307 struct btrfs_balance_item
*bi
,
2308 const struct btrfs_disk_balance_args
*ba
)
2310 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2313 static inline void btrfs_balance_meta(const struct extent_buffer
*eb
,
2314 const struct btrfs_balance_item
*bi
,
2315 struct btrfs_disk_balance_args
*ba
)
2317 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2320 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2321 struct btrfs_balance_item
*bi
,
2322 const struct btrfs_disk_balance_args
*ba
)
2324 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2327 static inline void btrfs_balance_sys(const struct extent_buffer
*eb
,
2328 const struct btrfs_balance_item
*bi
,
2329 struct btrfs_disk_balance_args
*ba
)
2331 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2334 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2335 struct btrfs_balance_item
*bi
,
2336 const struct btrfs_disk_balance_args
*ba
)
2338 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2342 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2343 const struct btrfs_disk_balance_args
*disk
)
2345 memset(cpu
, 0, sizeof(*cpu
));
2347 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2348 cpu
->usage
= le64_to_cpu(disk
->usage
);
2349 cpu
->devid
= le64_to_cpu(disk
->devid
);
2350 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2351 cpu
->pend
= le64_to_cpu(disk
->pend
);
2352 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2353 cpu
->vend
= le64_to_cpu(disk
->vend
);
2354 cpu
->target
= le64_to_cpu(disk
->target
);
2355 cpu
->flags
= le64_to_cpu(disk
->flags
);
2356 cpu
->limit
= le64_to_cpu(disk
->limit
);
2357 cpu
->stripes_min
= le32_to_cpu(disk
->stripes_min
);
2358 cpu
->stripes_max
= le32_to_cpu(disk
->stripes_max
);
2362 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2363 const struct btrfs_balance_args
*cpu
)
2365 memset(disk
, 0, sizeof(*disk
));
2367 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2368 disk
->usage
= cpu_to_le64(cpu
->usage
);
2369 disk
->devid
= cpu_to_le64(cpu
->devid
);
2370 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2371 disk
->pend
= cpu_to_le64(cpu
->pend
);
2372 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2373 disk
->vend
= cpu_to_le64(cpu
->vend
);
2374 disk
->target
= cpu_to_le64(cpu
->target
);
2375 disk
->flags
= cpu_to_le64(cpu
->flags
);
2376 disk
->limit
= cpu_to_le64(cpu
->limit
);
2377 disk
->stripes_min
= cpu_to_le32(cpu
->stripes_min
);
2378 disk
->stripes_max
= cpu_to_le32(cpu
->stripes_max
);
2381 /* struct btrfs_super_block */
2382 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2383 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2384 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2386 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2387 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2388 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2389 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2390 struct btrfs_super_block
, chunk_root_generation
, 64);
2391 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2393 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2395 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2396 chunk_root_level
, 8);
2397 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2399 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2400 log_root_transid
, 64);
2401 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2403 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2405 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2407 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2409 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2411 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2413 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2414 root_dir_objectid
, 64);
2415 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2417 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2419 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2420 compat_ro_flags
, 64);
2421 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2422 incompat_flags
, 64);
2423 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2425 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2426 cache_generation
, 64);
2427 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2428 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2429 uuid_tree_generation
, 64);
2431 static inline int btrfs_super_csum_size(const struct btrfs_super_block
*s
)
2433 u16 t
= btrfs_super_csum_type(s
);
2435 * csum type is validated at mount time
2437 return btrfs_csum_sizes
[t
];
2442 * The leaf data grows from end-to-front in the node.
2443 * this returns the address of the start of the last item,
2444 * which is the stop of the leaf data stack
2446 static inline unsigned int leaf_data_end(const struct extent_buffer
*leaf
)
2448 u32 nr
= btrfs_header_nritems(leaf
);
2451 return BTRFS_LEAF_DATA_SIZE(leaf
->fs_info
);
2452 return btrfs_item_offset_nr(leaf
, nr
- 1);
2455 /* struct btrfs_file_extent_item */
2456 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2457 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2458 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2459 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2460 struct btrfs_file_extent_item
, offset
, 64);
2461 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2462 struct btrfs_file_extent_item
, generation
, 64);
2463 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2464 struct btrfs_file_extent_item
, num_bytes
, 64);
2465 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2466 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2467 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2468 struct btrfs_file_extent_item
, compression
, 8);
2470 static inline unsigned long
2471 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item
*e
)
2473 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2476 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2478 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2481 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2483 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2485 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2486 disk_num_bytes
, 64);
2487 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2489 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2491 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2493 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2495 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2497 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2498 other_encoding
, 16);
2501 * this returns the number of bytes used by the item on disk, minus the
2502 * size of any extent headers. If a file is compressed on disk, this is
2503 * the compressed size
2505 static inline u32
btrfs_file_extent_inline_item_len(
2506 const struct extent_buffer
*eb
,
2507 struct btrfs_item
*e
)
2509 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2512 /* btrfs_dev_stats_item */
2513 static inline u64
btrfs_dev_stats_value(const struct extent_buffer
*eb
,
2514 const struct btrfs_dev_stats_item
*ptr
,
2519 read_extent_buffer(eb
, &val
,
2520 offsetof(struct btrfs_dev_stats_item
, values
) +
2521 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2526 static inline void btrfs_set_dev_stats_value(struct extent_buffer
*eb
,
2527 struct btrfs_dev_stats_item
*ptr
,
2530 write_extent_buffer(eb
, &val
,
2531 offsetof(struct btrfs_dev_stats_item
, values
) +
2532 ((unsigned long)ptr
) + (index
* sizeof(u64
)),
2536 /* btrfs_qgroup_status_item */
2537 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2539 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2541 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2543 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2546 /* btrfs_qgroup_info_item */
2547 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2549 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2550 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2552 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2553 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2556 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2557 struct btrfs_qgroup_info_item
, generation
, 64);
2558 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2560 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2561 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2562 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2564 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2565 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2567 /* btrfs_qgroup_limit_item */
2568 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2570 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2572 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2574 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2576 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2579 /* btrfs_dev_replace_item */
2580 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2581 struct btrfs_dev_replace_item
, src_devid
, 64);
2582 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2583 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2585 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2587 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2589 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2591 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2592 num_write_errors
, 64);
2593 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2594 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2596 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2598 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2601 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2602 struct btrfs_dev_replace_item
, src_devid
, 64);
2603 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2604 struct btrfs_dev_replace_item
,
2605 cont_reading_from_srcdev_mode
, 64);
2606 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2607 struct btrfs_dev_replace_item
, replace_state
, 64);
2608 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2609 struct btrfs_dev_replace_item
, time_started
, 64);
2610 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2611 struct btrfs_dev_replace_item
, time_stopped
, 64);
2612 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2613 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2614 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2615 struct btrfs_dev_replace_item
,
2616 num_uncorrectable_read_errors
, 64);
2617 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2618 struct btrfs_dev_replace_item
, cursor_left
, 64);
2619 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2620 struct btrfs_dev_replace_item
, cursor_right
, 64);
2622 /* helper function to cast into the data area of the leaf. */
2623 #define btrfs_item_ptr(leaf, slot, type) \
2624 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2625 btrfs_item_offset_nr(leaf, slot)))
2627 #define btrfs_item_ptr_offset(leaf, slot) \
2628 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2629 btrfs_item_offset_nr(leaf, slot)))
2631 static inline u64
btrfs_name_hash(const char *name
, int len
)
2633 return crc32c((u32
)~1, name
, len
);
2637 * Figure the key offset of an extended inode ref
2639 static inline u64
btrfs_extref_hash(u64 parent_objectid
, const char *name
,
2642 return (u64
) crc32c(parent_objectid
, name
, len
);
2645 static inline bool btrfs_mixed_space_info(struct btrfs_space_info
*space_info
)
2647 return ((space_info
->flags
& BTRFS_BLOCK_GROUP_METADATA
) &&
2648 (space_info
->flags
& BTRFS_BLOCK_GROUP_DATA
));
2651 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2653 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2658 enum btrfs_inline_ref_type
{
2659 BTRFS_REF_TYPE_INVALID
,
2660 BTRFS_REF_TYPE_BLOCK
,
2661 BTRFS_REF_TYPE_DATA
,
2665 int btrfs_get_extent_inline_ref_type(const struct extent_buffer
*eb
,
2666 struct btrfs_extent_inline_ref
*iref
,
2667 enum btrfs_inline_ref_type is_data
);
2669 u64
btrfs_csum_bytes_to_leaves(struct btrfs_fs_info
*fs_info
, u64 csum_bytes
);
2671 static inline u64
btrfs_calc_trans_metadata_size(struct btrfs_fs_info
*fs_info
,
2674 return (u64
)fs_info
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2678 * Doing a truncate won't result in new nodes or leaves, just what we need for
2681 static inline u64
btrfs_calc_trunc_metadata_size(struct btrfs_fs_info
*fs_info
,
2684 return (u64
)fs_info
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2687 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle
*trans
);
2688 bool btrfs_check_space_for_delayed_refs(struct btrfs_fs_info
*fs_info
);
2689 void btrfs_dec_block_group_reservations(struct btrfs_fs_info
*fs_info
,
2691 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache
*bg
);
2692 bool btrfs_inc_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2693 void btrfs_dec_nocow_writers(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2694 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache
*bg
);
2695 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2696 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2697 unsigned long count
);
2698 int btrfs_async_run_delayed_refs(struct btrfs_fs_info
*fs_info
,
2699 unsigned long count
, u64 transid
, int wait
);
2700 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info
*fs_info
,
2701 struct btrfs_delayed_ref_root
*delayed_refs
,
2702 struct btrfs_delayed_ref_head
*head
);
2703 int btrfs_lookup_data_extent(struct btrfs_fs_info
*fs_info
, u64 start
, u64 len
);
2704 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2705 struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2706 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2707 int btrfs_pin_extent(struct btrfs_fs_info
*fs_info
,
2708 u64 bytenr
, u64 num
, int reserved
);
2709 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info
*fs_info
,
2710 u64 bytenr
, u64 num_bytes
);
2711 int btrfs_exclude_logged_extents(struct extent_buffer
*eb
);
2712 int btrfs_cross_ref_exist(struct btrfs_root
*root
,
2713 u64 objectid
, u64 offset
, u64 bytenr
);
2714 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
2715 struct btrfs_fs_info
*info
,
2717 void btrfs_get_block_group(struct btrfs_block_group_cache
*cache
);
2718 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
2719 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2720 struct btrfs_root
*root
,
2721 u64 parent
, u64 root_objectid
,
2722 const struct btrfs_disk_key
*key
,
2723 int level
, u64 hint
,
2725 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2726 struct btrfs_root
*root
,
2727 struct extent_buffer
*buf
,
2728 u64 parent
, int last_ref
);
2729 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2730 struct btrfs_root
*root
, u64 owner
,
2731 u64 offset
, u64 ram_bytes
,
2732 struct btrfs_key
*ins
);
2733 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2734 u64 root_objectid
, u64 owner
, u64 offset
,
2735 struct btrfs_key
*ins
);
2736 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 ram_bytes
, u64 num_bytes
,
2737 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2738 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2739 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2740 struct extent_buffer
*buf
, int full_backref
);
2741 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2742 struct extent_buffer
*buf
, int full_backref
);
2743 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2744 struct btrfs_fs_info
*fs_info
,
2745 u64 bytenr
, u64 num_bytes
, u64 flags
,
2746 int level
, int is_data
);
2747 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
2748 struct btrfs_root
*root
,
2749 u64 bytenr
, u64 num_bytes
, u64 parent
, u64 root_objectid
,
2750 u64 owner
, u64 offset
);
2752 int btrfs_free_reserved_extent(struct btrfs_fs_info
*fs_info
,
2753 u64 start
, u64 len
, int delalloc
);
2754 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info
*fs_info
,
2755 u64 start
, u64 len
);
2756 void btrfs_prepare_extent_commit(struct btrfs_fs_info
*fs_info
);
2757 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
);
2758 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2759 struct btrfs_root
*root
,
2760 u64 bytenr
, u64 num_bytes
, u64 parent
,
2761 u64 root_objectid
, u64 owner
, u64 offset
);
2763 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle
*trans
);
2764 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
2765 struct btrfs_fs_info
*fs_info
);
2766 int btrfs_setup_space_cache(struct btrfs_trans_handle
*trans
,
2767 struct btrfs_fs_info
*fs_info
);
2768 int btrfs_extent_readonly(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2769 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
2770 int btrfs_read_block_groups(struct btrfs_fs_info
*info
);
2771 int btrfs_can_relocate(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2772 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
2773 u64 bytes_used
, u64 type
, u64 chunk_offset
,
2775 void btrfs_add_raid_kobjects(struct btrfs_fs_info
*fs_info
);
2776 struct btrfs_trans_handle
*btrfs_start_trans_remove_block_group(
2777 struct btrfs_fs_info
*fs_info
,
2778 const u64 chunk_offset
);
2779 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
2780 u64 group_start
, struct extent_map
*em
);
2781 void btrfs_delete_unused_bgs(struct btrfs_fs_info
*fs_info
);
2782 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2783 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache
*cache
);
2784 void btrfs_create_pending_block_groups(struct btrfs_trans_handle
*trans
);
2785 u64
btrfs_data_alloc_profile(struct btrfs_fs_info
*fs_info
);
2786 u64
btrfs_metadata_alloc_profile(struct btrfs_fs_info
*fs_info
);
2787 u64
btrfs_system_alloc_profile(struct btrfs_fs_info
*fs_info
);
2788 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2790 enum btrfs_reserve_flush_enum
{
2791 /* If we are in the transaction, we can't flush anything.*/
2792 BTRFS_RESERVE_NO_FLUSH
,
2794 * Flushing delalloc may cause deadlock somewhere, in this
2795 * case, use FLUSH LIMIT
2797 BTRFS_RESERVE_FLUSH_LIMIT
,
2798 BTRFS_RESERVE_FLUSH_ALL
,
2801 enum btrfs_flush_state
{
2802 FLUSH_DELAYED_ITEMS_NR
= 1,
2803 FLUSH_DELAYED_ITEMS
= 2,
2804 FLUSH_DELAYED_REFS_NR
= 3,
2805 FLUSH_DELAYED_REFS
= 4,
2807 FLUSH_DELALLOC_WAIT
= 6,
2809 ALLOC_CHUNK_FORCE
= 8,
2813 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode
*inode
, u64 bytes
);
2814 int btrfs_check_data_free_space(struct inode
*inode
,
2815 struct extent_changeset
**reserved
, u64 start
, u64 len
);
2816 void btrfs_free_reserved_data_space(struct inode
*inode
,
2817 struct extent_changeset
*reserved
, u64 start
, u64 len
);
2818 void btrfs_delalloc_release_space(struct inode
*inode
,
2819 struct extent_changeset
*reserved
,
2820 u64 start
, u64 len
, bool qgroup_free
);
2821 void btrfs_free_reserved_data_space_noquota(struct inode
*inode
, u64 start
,
2823 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle
*trans
);
2824 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2825 struct btrfs_block_rsv
*rsv
,
2826 int nitems
, bool use_global_rsv
);
2827 void btrfs_subvolume_release_metadata(struct btrfs_fs_info
*fs_info
,
2828 struct btrfs_block_rsv
*rsv
);
2829 void btrfs_delalloc_release_extents(struct btrfs_inode
*inode
, u64 num_bytes
,
2832 int btrfs_delalloc_reserve_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2833 void btrfs_delalloc_release_metadata(struct btrfs_inode
*inode
, u64 num_bytes
,
2835 int btrfs_delalloc_reserve_space(struct inode
*inode
,
2836 struct extent_changeset
**reserved
, u64 start
, u64 len
);
2837 void btrfs_init_block_rsv(struct btrfs_block_rsv
*rsv
, unsigned short type
);
2838 struct btrfs_block_rsv
*btrfs_alloc_block_rsv(struct btrfs_fs_info
*fs_info
,
2839 unsigned short type
);
2840 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info
*fs_info
,
2841 struct btrfs_block_rsv
*rsv
,
2842 unsigned short type
);
2843 void btrfs_free_block_rsv(struct btrfs_fs_info
*fs_info
,
2844 struct btrfs_block_rsv
*rsv
);
2845 int btrfs_block_rsv_add(struct btrfs_root
*root
,
2846 struct btrfs_block_rsv
*block_rsv
, u64 num_bytes
,
2847 enum btrfs_reserve_flush_enum flush
);
2848 int btrfs_block_rsv_check(struct btrfs_block_rsv
*block_rsv
, int min_factor
);
2849 int btrfs_block_rsv_refill(struct btrfs_root
*root
,
2850 struct btrfs_block_rsv
*block_rsv
, u64 min_reserved
,
2851 enum btrfs_reserve_flush_enum flush
);
2852 int btrfs_block_rsv_migrate(struct btrfs_block_rsv
*src_rsv
,
2853 struct btrfs_block_rsv
*dst_rsv
, u64 num_bytes
,
2855 int btrfs_cond_migrate_bytes(struct btrfs_fs_info
*fs_info
,
2856 struct btrfs_block_rsv
*dest
, u64 num_bytes
,
2858 void btrfs_block_rsv_release(struct btrfs_fs_info
*fs_info
,
2859 struct btrfs_block_rsv
*block_rsv
,
2861 void btrfs_delayed_refs_rsv_release(struct btrfs_fs_info
*fs_info
, int nr
);
2862 void btrfs_update_delayed_refs_rsv(struct btrfs_trans_handle
*trans
);
2863 int btrfs_delayed_refs_rsv_refill(struct btrfs_fs_info
*fs_info
,
2864 enum btrfs_reserve_flush_enum flush
);
2865 void btrfs_migrate_to_delayed_refs_rsv(struct btrfs_fs_info
*fs_info
,
2866 struct btrfs_block_rsv
*src
,
2868 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache
*cache
);
2869 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache
*cache
);
2870 void btrfs_put_block_group_cache(struct btrfs_fs_info
*info
);
2871 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2872 int btrfs_error_unpin_extent_range(struct btrfs_fs_info
*fs_info
,
2873 u64 start
, u64 end
);
2874 int btrfs_discard_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2875 u64 num_bytes
, u64
*actual_bytes
);
2876 int btrfs_force_chunk_alloc(struct btrfs_trans_handle
*trans
, u64 type
);
2877 int btrfs_trim_fs(struct btrfs_fs_info
*fs_info
, struct fstrim_range
*range
);
2879 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2880 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2881 struct btrfs_fs_info
*fs_info
);
2882 int btrfs_start_write_no_snapshotting(struct btrfs_root
*root
);
2883 void btrfs_end_write_no_snapshotting(struct btrfs_root
*root
);
2884 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2885 void check_system_chunk(struct btrfs_trans_handle
*trans
, const u64 type
);
2886 u64
add_new_free_space(struct btrfs_block_group_cache
*block_group
,
2887 u64 start
, u64 end
);
2888 void btrfs_mark_bg_unused(struct btrfs_block_group_cache
*bg
);
2891 int btrfs_bin_search(struct extent_buffer
*eb
, const struct btrfs_key
*key
,
2892 int level
, int *slot
);
2893 int btrfs_comp_cpu_keys(const struct btrfs_key
*k1
, const struct btrfs_key
*k2
);
2894 int btrfs_previous_item(struct btrfs_root
*root
,
2895 struct btrfs_path
*path
, u64 min_objectid
,
2897 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2898 struct btrfs_path
*path
, u64 min_objectid
);
2899 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2900 struct btrfs_path
*path
,
2901 const struct btrfs_key
*new_key
);
2902 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2903 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
2904 struct extent_buffer
*btrfs_read_lock_root_node(struct btrfs_root
*root
);
2905 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2906 struct btrfs_key
*key
, int lowest_level
,
2908 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2909 struct btrfs_path
*path
,
2911 enum btrfs_compare_tree_result
{
2912 BTRFS_COMPARE_TREE_NEW
,
2913 BTRFS_COMPARE_TREE_DELETED
,
2914 BTRFS_COMPARE_TREE_CHANGED
,
2915 BTRFS_COMPARE_TREE_SAME
,
2917 typedef int (*btrfs_changed_cb_t
)(struct btrfs_path
*left_path
,
2918 struct btrfs_path
*right_path
,
2919 struct btrfs_key
*key
,
2920 enum btrfs_compare_tree_result result
,
2922 int btrfs_compare_trees(struct btrfs_root
*left_root
,
2923 struct btrfs_root
*right_root
,
2924 btrfs_changed_cb_t cb
, void *ctx
);
2925 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2926 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2927 struct extent_buffer
*parent
, int parent_slot
,
2928 struct extent_buffer
**cow_ret
);
2929 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2930 struct btrfs_root
*root
,
2931 struct extent_buffer
*buf
,
2932 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2933 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2934 struct extent_buffer
*buf
);
2935 void btrfs_extend_item(struct btrfs_fs_info
*fs_info
, struct btrfs_path
*path
,
2937 void btrfs_truncate_item(struct btrfs_fs_info
*fs_info
,
2938 struct btrfs_path
*path
, u32 new_size
, int from_end
);
2939 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2940 struct btrfs_root
*root
,
2941 struct btrfs_path
*path
,
2942 const struct btrfs_key
*new_key
,
2943 unsigned long split_offset
);
2944 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2945 struct btrfs_root
*root
,
2946 struct btrfs_path
*path
,
2947 const struct btrfs_key
*new_key
);
2948 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2949 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2950 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2951 const struct btrfs_key
*key
, struct btrfs_path
*p
,
2952 int ins_len
, int cow
);
2953 int btrfs_search_old_slot(struct btrfs_root
*root
, const struct btrfs_key
*key
,
2954 struct btrfs_path
*p
, u64 time_seq
);
2955 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2956 const struct btrfs_key
*key
,
2957 struct btrfs_path
*p
, int find_higher
,
2959 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2960 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2961 int start_slot
, u64
*last_ret
,
2962 struct btrfs_key
*progress
);
2963 void btrfs_release_path(struct btrfs_path
*p
);
2964 struct btrfs_path
*btrfs_alloc_path(void);
2965 void btrfs_free_path(struct btrfs_path
*p
);
2966 void btrfs_set_path_blocking(struct btrfs_path
*p
);
2967 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
2969 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2970 struct btrfs_path
*path
, int slot
, int nr
);
2971 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2972 struct btrfs_root
*root
,
2973 struct btrfs_path
*path
)
2975 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2978 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2979 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2980 u32 total_data
, u32 total_size
, int nr
);
2981 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2982 const struct btrfs_key
*key
, void *data
, u32 data_size
);
2983 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2984 struct btrfs_root
*root
,
2985 struct btrfs_path
*path
,
2986 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2989 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2990 struct btrfs_root
*root
,
2991 struct btrfs_path
*path
,
2992 const struct btrfs_key
*key
,
2995 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2998 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2999 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
3000 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
3002 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
3003 struct btrfs_path
*p
, u64 time_seq
)
3006 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
3007 return btrfs_next_old_leaf(root
, p
, time_seq
);
3010 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
3012 return btrfs_next_old_item(root
, p
, 0);
3014 int btrfs_leaf_free_space(struct extent_buffer
*leaf
);
3015 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
,
3016 struct btrfs_block_rsv
*block_rsv
,
3017 int update_ref
, int for_reloc
);
3018 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
3019 struct btrfs_root
*root
,
3020 struct extent_buffer
*node
,
3021 struct extent_buffer
*parent
);
3022 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
3025 * Do it this way so we only ever do one test_bit in the normal case.
3027 if (test_bit(BTRFS_FS_CLOSING_START
, &fs_info
->flags
)) {
3028 if (test_bit(BTRFS_FS_CLOSING_DONE
, &fs_info
->flags
))
3036 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3037 * anything except sleeping. This function is used to check the status of
3040 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info
*fs_info
)
3042 return fs_info
->sb
->s_flags
& SB_RDONLY
|| btrfs_fs_closing(fs_info
);
3045 static inline void free_fs_info(struct btrfs_fs_info
*fs_info
)
3047 kfree(fs_info
->balance_ctl
);
3048 kfree(fs_info
->delayed_root
);
3049 kfree(fs_info
->extent_root
);
3050 kfree(fs_info
->tree_root
);
3051 kfree(fs_info
->chunk_root
);
3052 kfree(fs_info
->dev_root
);
3053 kfree(fs_info
->csum_root
);
3054 kfree(fs_info
->quota_root
);
3055 kfree(fs_info
->uuid_root
);
3056 kfree(fs_info
->free_space_root
);
3057 kfree(fs_info
->super_copy
);
3058 kfree(fs_info
->super_for_commit
);
3062 /* tree mod log functions from ctree.c */
3063 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3064 struct seq_list
*elem
);
3065 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
3066 struct seq_list
*elem
);
3067 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
3070 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
, u64 root_id
,
3071 u64 ref_id
, u64 dirid
, u64 sequence
, const char *name
,
3073 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
, u64 root_id
,
3074 u64 ref_id
, u64 dirid
, u64
*sequence
, const char *name
,
3076 int btrfs_del_root(struct btrfs_trans_handle
*trans
,
3077 const struct btrfs_key
*key
);
3078 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3079 const struct btrfs_key
*key
,
3080 struct btrfs_root_item
*item
);
3081 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3082 struct btrfs_root
*root
,
3083 struct btrfs_key
*key
,
3084 struct btrfs_root_item
*item
);
3085 int btrfs_find_root(struct btrfs_root
*root
, const struct btrfs_key
*search_key
,
3086 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3087 struct btrfs_key
*root_key
);
3088 int btrfs_find_orphan_roots(struct btrfs_fs_info
*fs_info
);
3089 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3090 struct extent_buffer
*node
);
3091 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3092 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3093 struct btrfs_root
*root
);
3096 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
, u8
*uuid
, u8 type
,
3098 int btrfs_uuid_tree_remove(struct btrfs_trans_handle
*trans
, u8
*uuid
, u8 type
,
3100 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
,
3101 int (*check_func
)(struct btrfs_fs_info
*, u8
*, u8
,
3105 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3106 const char *name
, int name_len
);
3107 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, const char *name
,
3108 int name_len
, struct btrfs_inode
*dir
,
3109 struct btrfs_key
*location
, u8 type
, u64 index
);
3110 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3111 struct btrfs_root
*root
,
3112 struct btrfs_path
*path
, u64 dir
,
3113 const char *name
, int name_len
,
3115 struct btrfs_dir_item
*
3116 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3117 struct btrfs_root
*root
,
3118 struct btrfs_path
*path
, u64 dir
,
3119 u64 objectid
, const char *name
, int name_len
,
3121 struct btrfs_dir_item
*
3122 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3123 struct btrfs_path
*path
, u64 dirid
,
3124 const char *name
, int name_len
);
3125 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3126 struct btrfs_root
*root
,
3127 struct btrfs_path
*path
,
3128 struct btrfs_dir_item
*di
);
3129 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3130 struct btrfs_root
*root
,
3131 struct btrfs_path
*path
, u64 objectid
,
3132 const char *name
, u16 name_len
,
3133 const void *data
, u16 data_len
);
3134 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3135 struct btrfs_root
*root
,
3136 struct btrfs_path
*path
, u64 dir
,
3137 const char *name
, u16 name_len
,
3139 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_fs_info
*fs_info
,
3140 struct btrfs_path
*path
,
3145 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3146 struct btrfs_root
*root
, u64 offset
);
3147 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3148 struct btrfs_root
*root
, u64 offset
);
3149 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3152 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3153 struct btrfs_root
*root
,
3154 const char *name
, int name_len
,
3155 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3156 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3157 struct btrfs_root
*root
,
3158 const char *name
, int name_len
,
3159 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3160 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3161 struct btrfs_root
*root
,
3162 struct btrfs_path
*path
, u64 objectid
);
3163 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3164 *root
, struct btrfs_path
*path
,
3165 struct btrfs_key
*location
, int mod
);
3167 struct btrfs_inode_extref
*
3168 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3169 struct btrfs_root
*root
,
3170 struct btrfs_path
*path
,
3171 const char *name
, int name_len
,
3172 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3175 int btrfs_find_name_in_backref(struct extent_buffer
*leaf
, int slot
,
3177 int name_len
, struct btrfs_inode_ref
**ref_ret
);
3178 int btrfs_find_name_in_ext_backref(struct extent_buffer
*leaf
, int slot
,
3179 u64 ref_objectid
, const char *name
,
3181 struct btrfs_inode_extref
**extref_ret
);
3184 struct btrfs_dio_private
;
3185 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3186 struct btrfs_fs_info
*fs_info
, u64 bytenr
, u64 len
);
3187 blk_status_t
btrfs_lookup_bio_sums(struct inode
*inode
, struct bio
*bio
, u32
*dst
);
3188 blk_status_t
btrfs_lookup_bio_sums_dio(struct inode
*inode
, struct bio
*bio
,
3189 u64 logical_offset
);
3190 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3191 struct btrfs_root
*root
,
3192 u64 objectid
, u64 pos
,
3193 u64 disk_offset
, u64 disk_num_bytes
,
3194 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3195 u8 compression
, u8 encryption
, u16 other_encoding
);
3196 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3197 struct btrfs_root
*root
,
3198 struct btrfs_path
*path
, u64 objectid
,
3199 u64 bytenr
, int mod
);
3200 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3201 struct btrfs_root
*root
,
3202 struct btrfs_ordered_sum
*sums
);
3203 blk_status_t
btrfs_csum_one_bio(struct inode
*inode
, struct bio
*bio
,
3204 u64 file_start
, int contig
);
3205 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3206 struct list_head
*list
, int search_commit
);
3207 void btrfs_extent_item_to_extent_map(struct btrfs_inode
*inode
,
3208 const struct btrfs_path
*path
,
3209 struct btrfs_file_extent_item
*fi
,
3210 const bool new_inline
,
3211 struct extent_map
*em
);
3214 struct extent_map
*btrfs_get_extent_fiemap(struct btrfs_inode
*inode
,
3215 u64 start
, u64 len
);
3216 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3217 u64
*orig_start
, u64
*orig_block_len
,
3220 void __btrfs_del_delalloc_inode(struct btrfs_root
*root
,
3221 struct btrfs_inode
*inode
);
3222 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3223 int btrfs_set_inode_index(struct btrfs_inode
*dir
, u64
*index
);
3224 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3225 struct btrfs_root
*root
,
3226 struct btrfs_inode
*dir
, struct btrfs_inode
*inode
,
3227 const char *name
, int name_len
);
3228 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3229 struct btrfs_inode
*parent_inode
, struct btrfs_inode
*inode
,
3230 const char *name
, int name_len
, int add_backref
, u64 index
);
3231 int btrfs_delete_subvolume(struct inode
*dir
, struct dentry
*dentry
);
3232 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
3234 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3235 struct btrfs_root
*root
,
3236 struct inode
*inode
, u64 new_size
,
3239 int btrfs_start_delalloc_snapshot(struct btrfs_root
*root
);
3240 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, int nr
);
3241 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
,
3242 unsigned int extra_bits
,
3243 struct extent_state
**cached_state
, int dedupe
);
3244 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3245 struct btrfs_root
*new_root
,
3246 struct btrfs_root
*parent_root
,
3248 void btrfs_set_delalloc_extent(struct inode
*inode
, struct extent_state
*state
,
3250 void btrfs_clear_delalloc_extent(struct inode
*inode
,
3251 struct extent_state
*state
, unsigned *bits
);
3252 void btrfs_merge_delalloc_extent(struct inode
*inode
, struct extent_state
*new,
3253 struct extent_state
*other
);
3254 void btrfs_split_delalloc_extent(struct inode
*inode
,
3255 struct extent_state
*orig
, u64 split
);
3256 int btrfs_bio_fits_in_stripe(struct page
*page
, size_t size
, struct bio
*bio
,
3257 unsigned long bio_flags
);
3258 void btrfs_set_range_writeback(struct extent_io_tree
*tree
, u64 start
, u64 end
);
3259 vm_fault_t
btrfs_page_mkwrite(struct vm_fault
*vmf
);
3260 int btrfs_readpage(struct file
*file
, struct page
*page
);
3261 void btrfs_evict_inode(struct inode
*inode
);
3262 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3263 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3264 void btrfs_destroy_inode(struct inode
*inode
);
3265 int btrfs_drop_inode(struct inode
*inode
);
3266 int __init
btrfs_init_cachep(void);
3267 void __cold
btrfs_destroy_cachep(void);
3268 struct inode
*btrfs_iget_path(struct super_block
*s
, struct btrfs_key
*location
,
3269 struct btrfs_root
*root
, int *new,
3270 struct btrfs_path
*path
);
3271 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
3272 struct btrfs_root
*root
, int *was_new
);
3273 struct extent_map
*btrfs_get_extent(struct btrfs_inode
*inode
,
3274 struct page
*page
, size_t pg_offset
,
3275 u64 start
, u64 end
, int create
);
3276 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3277 struct btrfs_root
*root
,
3278 struct inode
*inode
);
3279 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3280 struct btrfs_root
*root
, struct inode
*inode
);
3281 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
,
3282 struct btrfs_inode
*inode
);
3283 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3284 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3285 void btrfs_add_delayed_iput(struct inode
*inode
);
3286 void btrfs_run_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3287 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3288 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3289 u64 start
, u64 num_bytes
, u64 min_size
,
3290 loff_t actual_len
, u64
*alloc_hint
);
3291 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3292 struct btrfs_trans_handle
*trans
, int mode
,
3293 u64 start
, u64 num_bytes
, u64 min_size
,
3294 loff_t actual_len
, u64
*alloc_hint
);
3295 int btrfs_run_delalloc_range(struct inode
*inode
, struct page
*locked_page
,
3296 u64 start
, u64 end
, int *page_started
, unsigned long *nr_written
,
3297 struct writeback_control
*wbc
);
3298 int btrfs_writepage_cow_fixup(struct page
*page
, u64 start
, u64 end
);
3299 void btrfs_writepage_endio_finish_ordered(struct page
*page
, u64 start
,
3300 u64 end
, int uptodate
);
3301 extern const struct dentry_operations btrfs_dentry_operations
;
3304 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3305 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3306 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3307 void btrfs_sync_inode_flags_to_i_flags(struct inode
*inode
);
3308 int btrfs_is_empty_uuid(u8
*uuid
);
3309 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3310 struct btrfs_ioctl_defrag_range_args
*range
,
3311 u64 newer_than
, unsigned long max_pages
);
3312 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3313 struct btrfs_ioctl_space_info
*space
);
3314 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
,
3315 struct btrfs_ioctl_balance_args
*bargs
);
3318 int __init
btrfs_auto_defrag_init(void);
3319 void __cold
btrfs_auto_defrag_exit(void);
3320 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3321 struct btrfs_inode
*inode
);
3322 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3323 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3324 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3325 void btrfs_drop_extent_cache(struct btrfs_inode
*inode
, u64 start
, u64 end
,
3327 extern const struct file_operations btrfs_file_operations
;
3328 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3329 struct btrfs_root
*root
, struct inode
*inode
,
3330 struct btrfs_path
*path
, u64 start
, u64 end
,
3331 u64
*drop_end
, int drop_cache
,
3333 u32 extent_item_size
,
3335 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3336 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3337 u64 end
, int drop_cache
);
3338 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3339 struct btrfs_inode
*inode
, u64 start
, u64 end
);
3340 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3341 int btrfs_dirty_pages(struct inode
*inode
, struct page
**pages
,
3342 size_t num_pages
, loff_t pos
, size_t write_bytes
,
3343 struct extent_state
**cached
);
3344 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3345 loff_t
btrfs_remap_file_range(struct file
*file_in
, loff_t pos_in
,
3346 struct file
*file_out
, loff_t pos_out
,
3347 loff_t len
, unsigned int remap_flags
);
3350 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3351 struct btrfs_root
*root
);
3354 int __init
btrfs_init_sysfs(void);
3355 void __cold
btrfs_exit_sysfs(void);
3356 int btrfs_sysfs_add_mounted(struct btrfs_fs_info
*fs_info
);
3357 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info
*fs_info
);
3360 int btrfs_parse_options(struct btrfs_fs_info
*info
, char *options
,
3361 unsigned long new_flags
);
3362 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3364 static inline __printf(2, 3) __cold
3365 void btrfs_no_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3369 #ifdef CONFIG_PRINTK
3372 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3374 #define btrfs_printk(fs_info, fmt, args...) \
3375 btrfs_no_printk(fs_info, fmt, ##args)
3378 #define btrfs_emerg(fs_info, fmt, args...) \
3379 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3380 #define btrfs_alert(fs_info, fmt, args...) \
3381 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3382 #define btrfs_crit(fs_info, fmt, args...) \
3383 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3384 #define btrfs_err(fs_info, fmt, args...) \
3385 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3386 #define btrfs_warn(fs_info, fmt, args...) \
3387 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3388 #define btrfs_notice(fs_info, fmt, args...) \
3389 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3390 #define btrfs_info(fs_info, fmt, args...) \
3391 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3394 * Wrappers that use printk_in_rcu
3396 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3397 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3398 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3399 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3400 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3401 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3402 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3403 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3404 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3405 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3406 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3407 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3408 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3409 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3412 * Wrappers that use a ratelimited printk_in_rcu
3414 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3415 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3416 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3417 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3418 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3419 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3420 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3421 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3422 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3423 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3424 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3425 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3426 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3427 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3430 * Wrappers that use a ratelimited printk
3432 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3433 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3434 #define btrfs_alert_rl(fs_info, fmt, args...) \
3435 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3436 #define btrfs_crit_rl(fs_info, fmt, args...) \
3437 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3438 #define btrfs_err_rl(fs_info, fmt, args...) \
3439 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3440 #define btrfs_warn_rl(fs_info, fmt, args...) \
3441 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3442 #define btrfs_notice_rl(fs_info, fmt, args...) \
3443 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3444 #define btrfs_info_rl(fs_info, fmt, args...) \
3445 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3447 #if defined(CONFIG_DYNAMIC_DEBUG)
3448 #define btrfs_debug(fs_info, fmt, args...) \
3449 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3450 fs_info, KERN_DEBUG fmt, ##args)
3451 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3452 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3453 fs_info, KERN_DEBUG fmt, ##args)
3454 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3455 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3456 fs_info, KERN_DEBUG fmt, ##args)
3457 #define btrfs_debug_rl(fs_info, fmt, args...) \
3458 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3459 fs_info, KERN_DEBUG fmt, ##args)
3460 #elif defined(DEBUG)
3461 #define btrfs_debug(fs_info, fmt, args...) \
3462 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3463 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3464 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3465 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3466 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3467 #define btrfs_debug_rl(fs_info, fmt, args...) \
3468 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3470 #define btrfs_debug(fs_info, fmt, args...) \
3471 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3472 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3473 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3474 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3475 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3476 #define btrfs_debug_rl(fs_info, fmt, args...) \
3477 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3480 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3483 btrfs_printk(fs_info, fmt, ##args); \
3484 rcu_read_unlock(); \
3487 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3490 btrfs_no_printk(fs_info, fmt, ##args); \
3491 rcu_read_unlock(); \
3494 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3496 static DEFINE_RATELIMIT_STATE(_rs, \
3497 DEFAULT_RATELIMIT_INTERVAL, \
3498 DEFAULT_RATELIMIT_BURST); \
3499 if (__ratelimit(&_rs)) \
3500 btrfs_printk(fs_info, fmt, ##args); \
3503 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3506 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3507 rcu_read_unlock(); \
3511 static inline void assfail(const char *expr
, const char *file
, int line
)
3513 if (IS_ENABLED(CONFIG_BTRFS_ASSERT
)) {
3514 pr_err("assertion failed: %s, file: %s, line: %d\n",
3520 #define ASSERT(expr) \
3521 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3524 * Use that for functions that are conditionally exported for sanity tests but
3527 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3528 #define EXPORT_FOR_TESTS static
3530 #define EXPORT_FOR_TESTS
3534 static inline void btrfs_print_v0_err(struct btrfs_fs_info
*fs_info
)
3537 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3542 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3543 unsigned int line
, int errno
, const char *fmt
, ...);
3545 const char *btrfs_decode_error(int errno
);
3548 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3549 const char *function
,
3550 unsigned int line
, int errno
);
3553 * Call btrfs_abort_transaction as early as possible when an error condition is
3554 * detected, that way the exact line number is reported.
3556 #define btrfs_abort_transaction(trans, errno) \
3558 /* Report first abort since mount */ \
3559 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3560 &((trans)->fs_info->fs_state))) { \
3561 if ((errno) != -EIO) { \
3562 WARN(1, KERN_DEBUG \
3563 "BTRFS: Transaction aborted (error %d)\n", \
3566 btrfs_debug((trans)->fs_info, \
3567 "Transaction aborted (error %d)", \
3571 __btrfs_abort_transaction((trans), __func__, \
3572 __LINE__, (errno)); \
3575 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3577 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3578 (errno), fmt, ##args); \
3583 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3584 unsigned int line
, int errno
, const char *fmt
, ...);
3586 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3587 * will panic(). Otherwise we BUG() here.
3589 #define btrfs_panic(fs_info, errno, fmt, args...) \
3591 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3596 /* compatibility and incompatibility defines */
3598 #define btrfs_set_fs_incompat(__fs_info, opt) \
3599 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3601 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3604 struct btrfs_super_block
*disk_super
;
3607 disk_super
= fs_info
->super_copy
;
3608 features
= btrfs_super_incompat_flags(disk_super
);
3609 if (!(features
& flag
)) {
3610 spin_lock(&fs_info
->super_lock
);
3611 features
= btrfs_super_incompat_flags(disk_super
);
3612 if (!(features
& flag
)) {
3614 btrfs_set_super_incompat_flags(disk_super
, features
);
3615 btrfs_info(fs_info
, "setting %llu feature flag",
3618 spin_unlock(&fs_info
->super_lock
);
3622 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3623 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3625 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3628 struct btrfs_super_block
*disk_super
;
3631 disk_super
= fs_info
->super_copy
;
3632 features
= btrfs_super_incompat_flags(disk_super
);
3633 if (features
& flag
) {
3634 spin_lock(&fs_info
->super_lock
);
3635 features
= btrfs_super_incompat_flags(disk_super
);
3636 if (features
& flag
) {
3638 btrfs_set_super_incompat_flags(disk_super
, features
);
3639 btrfs_info(fs_info
, "clearing %llu feature flag",
3642 spin_unlock(&fs_info
->super_lock
);
3646 #define btrfs_fs_incompat(fs_info, opt) \
3647 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3649 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3651 struct btrfs_super_block
*disk_super
;
3652 disk_super
= fs_info
->super_copy
;
3653 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3656 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3657 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3659 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3662 struct btrfs_super_block
*disk_super
;
3665 disk_super
= fs_info
->super_copy
;
3666 features
= btrfs_super_compat_ro_flags(disk_super
);
3667 if (!(features
& flag
)) {
3668 spin_lock(&fs_info
->super_lock
);
3669 features
= btrfs_super_compat_ro_flags(disk_super
);
3670 if (!(features
& flag
)) {
3672 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3673 btrfs_info(fs_info
, "setting %llu ro feature flag",
3676 spin_unlock(&fs_info
->super_lock
);
3680 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3681 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3683 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3686 struct btrfs_super_block
*disk_super
;
3689 disk_super
= fs_info
->super_copy
;
3690 features
= btrfs_super_compat_ro_flags(disk_super
);
3691 if (features
& flag
) {
3692 spin_lock(&fs_info
->super_lock
);
3693 features
= btrfs_super_compat_ro_flags(disk_super
);
3694 if (features
& flag
) {
3696 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3697 btrfs_info(fs_info
, "clearing %llu ro feature flag",
3700 spin_unlock(&fs_info
->super_lock
);
3704 #define btrfs_fs_compat_ro(fs_info, opt) \
3705 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3707 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3709 struct btrfs_super_block
*disk_super
;
3710 disk_super
= fs_info
->super_copy
;
3711 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3715 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3716 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3717 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3718 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3719 struct inode
*inode
, struct inode
*dir
);
3721 #define btrfs_get_acl NULL
3722 #define btrfs_set_acl NULL
3723 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3724 struct inode
*inode
, struct inode
*dir
)
3731 int btrfs_relocate_block_group(struct btrfs_fs_info
*fs_info
, u64 group_start
);
3732 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3733 struct btrfs_root
*root
);
3734 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3735 struct btrfs_root
*root
);
3736 int btrfs_recover_relocation(struct btrfs_root
*root
);
3737 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
3738 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3739 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3740 struct extent_buffer
*cow
);
3741 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3742 u64
*bytes_to_reserve
);
3743 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3744 struct btrfs_pending_snapshot
*pending
);
3747 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3748 u64 end
, struct btrfs_scrub_progress
*progress
,
3749 int readonly
, int is_dev_replace
);
3750 void btrfs_scrub_pause(struct btrfs_fs_info
*fs_info
);
3751 void btrfs_scrub_continue(struct btrfs_fs_info
*fs_info
);
3752 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3753 int btrfs_scrub_cancel_dev(struct btrfs_fs_info
*info
,
3754 struct btrfs_device
*dev
);
3755 int btrfs_scrub_progress(struct btrfs_fs_info
*fs_info
, u64 devid
,
3756 struct btrfs_scrub_progress
*progress
);
3757 static inline void btrfs_init_full_stripe_locks_tree(
3758 struct btrfs_full_stripe_locks_tree
*locks_root
)
3760 locks_root
->root
= RB_ROOT
;
3761 mutex_init(&locks_root
->lock
);
3765 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3766 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3767 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3769 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3771 btrfs_bio_counter_sub(fs_info
, 1);
3775 struct reada_control
{
3776 struct btrfs_fs_info
*fs_info
; /* tree to prefetch */
3777 struct btrfs_key key_start
;
3778 struct btrfs_key key_end
; /* exclusive */
3781 wait_queue_head_t wait
;
3783 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3784 struct btrfs_key
*start
, struct btrfs_key
*end
);
3785 int btrfs_reada_wait(void *handle
);
3786 void btrfs_reada_detach(void *handle
);
3787 int btree_readahead_hook(struct extent_buffer
*eb
, int err
);
3789 static inline int is_fstree(u64 rootid
)
3791 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3792 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3793 !btrfs_qgroup_level(rootid
)))
3798 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3800 return signal_pending(current
);
3803 /* Sanity test specific functions */
3804 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3805 void btrfs_test_inode_set_ops(struct inode
*inode
);
3806 void btrfs_test_destroy_inode(struct inode
*inode
);
3808 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3810 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
, &fs_info
->fs_state
);
3813 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3819 static inline void cond_wake_up(struct wait_queue_head
*wq
)
3822 * This implies a full smp_mb barrier, see comments for
3823 * waitqueue_active why.
3825 if (wq_has_sleeper(wq
))
3829 static inline void cond_wake_up_nomb(struct wait_queue_head
*wq
)
3832 * Special case for conditional wakeup where the barrier required for
3833 * waitqueue_active is implied by some of the preceding code. Eg. one
3834 * of such atomic operations (atomic_dec_and_return, ...), or a
3835 * unlock/lock sequence, etc.
3837 if (waitqueue_active(wq
))