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 <trace/events/btrfs.h>
20 #include <asm/unaligned.h>
21 #include <linux/pagemap.h>
22 #include <linux/btrfs.h>
23 #include <linux/btrfs_tree.h>
24 #include <linux/workqueue.h>
25 #include <linux/security.h>
26 #include <linux/sizes.h>
27 #include <linux/dynamic_debug.h>
28 #include <linux/refcount.h>
29 #include <linux/crc32c.h>
30 #include <linux/iomap.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
38 struct btrfs_trans_handle
;
39 struct btrfs_transaction
;
40 struct btrfs_pending_snapshot
;
41 struct btrfs_delayed_ref_root
;
42 struct btrfs_space_info
;
43 struct btrfs_block_group
;
44 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
45 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
46 extern struct kmem_cache
*btrfs_path_cachep
;
47 extern struct kmem_cache
*btrfs_free_space_cachep
;
48 extern struct kmem_cache
*btrfs_free_space_bitmap_cachep
;
49 struct btrfs_ordered_sum
;
52 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
55 * Maximum number of mirrors that can be available for all profiles counting
56 * the target device of dev-replace as one. During an active device replace
57 * procedure, the target device of the copy operation is a mirror for the
58 * filesystem data as well that can be used to read data in order to repair
59 * read errors on other disks.
61 * Current value is derived from RAID1C4 with 4 copies.
63 #define BTRFS_MAX_MIRRORS (4 + 1)
65 #define BTRFS_MAX_LEVEL 8
67 #define BTRFS_OLDEST_GENERATION 0ULL
70 * we can actually store much bigger names, but lets not confuse the rest
73 #define BTRFS_NAME_LEN 255
76 * Theoretical limit is larger, but we keep this down to a sane
77 * value. That should limit greatly the possibility of collisions on
80 #define BTRFS_LINK_MAX 65535U
82 #define BTRFS_EMPTY_DIR_SIZE 0
84 /* ioprio of readahead is set to idle */
85 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
87 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
90 * Use large batch size to reduce overhead of metadata updates. On the reader
91 * side, we only read it when we are close to ENOSPC and the read overhead is
92 * mostly related to the number of CPUs, so it is OK to use arbitrary large
95 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
97 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
100 * Deltas are an effective way to populate global statistics. Give macro names
101 * to make it clear what we're doing. An example is discard_extents in
102 * btrfs_free_space_ctl.
104 #define BTRFS_STAT_NR_ENTRIES 2
105 #define BTRFS_STAT_CURR 0
106 #define BTRFS_STAT_PREV 1
109 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
111 static inline u32
count_max_extents(u64 size
)
113 return div_u64(size
+ BTRFS_MAX_EXTENT_SIZE
- 1, BTRFS_MAX_EXTENT_SIZE
);
116 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
118 BUG_ON(num_stripes
== 0);
119 return sizeof(struct btrfs_chunk
) +
120 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
124 * Runtime (in-memory) states of filesystem
127 /* Global indicator of serious filesystem errors */
128 BTRFS_FS_STATE_ERROR
,
130 * Filesystem is being remounted, allow to skip some operations, like
133 BTRFS_FS_STATE_REMOUNTING
,
134 /* Filesystem in RO mode */
136 /* Track if a transaction abort has been reported on this filesystem */
137 BTRFS_FS_STATE_TRANS_ABORTED
,
139 * Bio operations should be blocked on this filesystem because a source
140 * or target device is being destroyed as part of a device replace
142 BTRFS_FS_STATE_DEV_REPLACING
,
143 /* The btrfs_fs_info created for self-tests */
144 BTRFS_FS_STATE_DUMMY_FS_INFO
,
147 #define BTRFS_BACKREF_REV_MAX 256
148 #define BTRFS_BACKREF_REV_SHIFT 56
149 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
150 BTRFS_BACKREF_REV_SHIFT)
152 #define BTRFS_OLD_BACKREF_REV 0
153 #define BTRFS_MIXED_BACKREF_REV 1
156 * every tree block (leaf or node) starts with this header.
158 struct btrfs_header
{
159 /* these first four must match the super block */
160 u8 csum
[BTRFS_CSUM_SIZE
];
161 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
162 __le64 bytenr
; /* which block this node is supposed to live in */
165 /* allowed to be different from the super from here on down */
166 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
171 } __attribute__ ((__packed__
));
174 * this is a very generous portion of the super block, giving us
175 * room to translate 14 chunks with 3 stripes each.
177 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
180 * just in case we somehow lose the roots and are not able to mount,
181 * we store an array of the roots from previous transactions
184 #define BTRFS_NUM_BACKUP_ROOTS 4
185 struct btrfs_root_backup
{
187 __le64 tree_root_gen
;
190 __le64 chunk_root_gen
;
193 __le64 extent_root_gen
;
202 __le64 csum_root_gen
;
212 u8 extent_root_level
;
216 /* future and to align */
218 } __attribute__ ((__packed__
));
221 * the super block basically lists the main trees of the FS
222 * it currently lacks any block count etc etc
224 struct btrfs_super_block
{
225 /* the first 4 fields must match struct btrfs_header */
226 u8 csum
[BTRFS_CSUM_SIZE
];
227 /* FS specific UUID, visible to user */
228 u8 fsid
[BTRFS_FSID_SIZE
];
229 __le64 bytenr
; /* this block number */
232 /* allowed to be different from the btrfs_header from here own down */
239 /* this will help find the new super based on the log root */
240 __le64 log_root_transid
;
243 __le64 root_dir_objectid
;
247 __le32 __unused_leafsize
;
249 __le32 sys_chunk_array_size
;
250 __le64 chunk_root_generation
;
252 __le64 compat_ro_flags
;
253 __le64 incompat_flags
;
258 struct btrfs_dev_item dev_item
;
260 char label
[BTRFS_LABEL_SIZE
];
262 __le64 cache_generation
;
263 __le64 uuid_tree_generation
;
265 /* the UUID written into btree blocks */
266 u8 metadata_uuid
[BTRFS_FSID_SIZE
];
268 /* future expansion */
270 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
271 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
272 } __attribute__ ((__packed__
));
275 * Compat flags that we support. If any incompat flags are set other than the
276 * ones specified below then we will fail to mount
278 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
279 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
280 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
282 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
283 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
284 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID | \
285 BTRFS_FEATURE_COMPAT_RO_VERITY)
287 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
288 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
290 #define BTRFS_FEATURE_INCOMPAT_SUPP \
291 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
292 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
293 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
294 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
295 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
296 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
297 BTRFS_FEATURE_INCOMPAT_RAID56 | \
298 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
299 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
300 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
301 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
302 BTRFS_FEATURE_INCOMPAT_RAID1C34 | \
303 BTRFS_FEATURE_INCOMPAT_ZONED)
305 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
306 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
307 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
310 * A leaf is full of items. offset and size tell us where to find
311 * the item in the leaf (relative to the start of the data area)
314 struct btrfs_disk_key key
;
317 } __attribute__ ((__packed__
));
320 * leaves have an item area and a data area:
321 * [item0, item1....itemN] [free space] [dataN...data1, data0]
323 * The data is separate from the items to get the keys closer together
327 struct btrfs_header header
;
328 struct btrfs_item items
[];
329 } __attribute__ ((__packed__
));
332 * all non-leaf blocks are nodes, they hold only keys and pointers to
335 struct btrfs_key_ptr
{
336 struct btrfs_disk_key key
;
339 } __attribute__ ((__packed__
));
342 struct btrfs_header header
;
343 struct btrfs_key_ptr ptrs
[];
344 } __attribute__ ((__packed__
));
346 /* Read ahead values for struct btrfs_path.reada */
352 * Similar to READA_FORWARD but unlike it:
354 * 1) It will trigger readahead even for leaves that are not close to
355 * each other on disk;
356 * 2) It also triggers readahead for nodes;
357 * 3) During a search, even when a node or leaf is already in memory, it
358 * will still trigger readahead for other nodes and leaves that follow
361 * This is meant to be used only when we know we are iterating over the
362 * entire tree or a very large part of it.
364 READA_FORWARD_ALWAYS
,
368 * btrfs_paths remember the path taken from the root down to the leaf.
369 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
370 * to any other levels that are present.
372 * The slots array records the index of the item or block pointer
373 * used while walking the tree.
376 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
377 int slots
[BTRFS_MAX_LEVEL
];
378 /* if there is real range locking, this locks field will change */
379 u8 locks
[BTRFS_MAX_LEVEL
];
381 /* keep some upper locks as we walk down */
385 * set by btrfs_split_item, tells search_slot to keep all locks
386 * and to force calls to keep space in the nodes
388 unsigned int search_for_split
:1;
389 unsigned int keep_locks
:1;
390 unsigned int skip_locking
:1;
391 unsigned int search_commit_root
:1;
392 unsigned int need_commit_sem
:1;
393 unsigned int skip_release_on_error
:1;
395 * Indicate that new item (btrfs_search_slot) is extending already
396 * existing item and ins_len contains only the data size and not item
397 * header (ie. sizeof(struct btrfs_item) is not included).
399 unsigned int search_for_extension
:1;
401 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
402 sizeof(struct btrfs_item))
403 struct btrfs_dev_replace
{
404 u64 replace_state
; /* see #define above */
405 time64_t time_started
; /* seconds since 1-Jan-1970 */
406 time64_t time_stopped
; /* seconds since 1-Jan-1970 */
407 atomic64_t num_write_errors
;
408 atomic64_t num_uncorrectable_read_errors
;
411 u64 committed_cursor_left
;
412 u64 cursor_left_last_write_of_item
;
415 u64 cont_reading_from_srcdev_mode
; /* see #define above */
418 int item_needs_writeback
;
419 struct btrfs_device
*srcdev
;
420 struct btrfs_device
*tgtdev
;
422 struct mutex lock_finishing_cancel_unmount
;
423 struct rw_semaphore rwsem
;
425 struct btrfs_scrub_progress scrub_progress
;
427 struct percpu_counter bio_counter
;
428 wait_queue_head_t replace_wait
;
432 * free clusters are used to claim free space in relatively large chunks,
433 * allowing us to do less seeky writes. They are used for all metadata
434 * allocations. In ssd_spread mode they are also used for data allocations.
436 struct btrfs_free_cluster
{
438 spinlock_t refill_lock
;
441 /* largest extent in this cluster */
444 /* first extent starting offset */
447 /* We did a full search and couldn't create a cluster */
450 struct btrfs_block_group
*block_group
;
452 * when a cluster is allocated from a block group, we put the
453 * cluster onto a list in the block group so that it can
454 * be freed before the block group is freed.
456 struct list_head block_group_list
;
459 enum btrfs_caching_type
{
463 BTRFS_CACHE_FINISHED
,
468 * Tree to record all locked full stripes of a RAID5/6 block group
470 struct btrfs_full_stripe_locks_tree
{
475 /* Discard control. */
477 * Async discard uses multiple lists to differentiate the discard filter
478 * parameters. Index 0 is for completely free block groups where we need to
479 * ensure the entire block group is trimmed without being lossy. Indices
480 * afterwards represent monotonically decreasing discard filter sizes to
481 * prioritize what should be discarded next.
483 #define BTRFS_NR_DISCARD_LISTS 3
484 #define BTRFS_DISCARD_INDEX_UNUSED 0
485 #define BTRFS_DISCARD_INDEX_START 1
487 struct btrfs_discard_ctl
{
488 struct workqueue_struct
*discard_workers
;
489 struct delayed_work work
;
491 struct btrfs_block_group
*block_group
;
492 struct list_head discard_list
[BTRFS_NR_DISCARD_LISTS
];
494 u64 prev_discard_time
;
495 atomic_t discardable_extents
;
496 atomic64_t discardable_bytes
;
497 u64 max_discard_size
;
501 u64 discard_extent_bytes
;
502 u64 discard_bitmap_bytes
;
503 atomic64_t discard_bytes_saved
;
506 enum btrfs_orphan_cleanup_state
{
507 ORPHAN_CLEANUP_STARTED
= 1,
508 ORPHAN_CLEANUP_DONE
= 2,
511 void btrfs_init_async_reclaim_work(struct btrfs_fs_info
*fs_info
);
514 struct reloc_control
;
516 struct btrfs_fs_devices
;
517 struct btrfs_balance_control
;
518 struct btrfs_delayed_root
;
521 * Block group or device which contains an active swapfile. Used for preventing
522 * unsafe operations while a swapfile is active.
524 * These are sorted on (ptr, inode) (note that a block group or device can
525 * contain more than one swapfile). We compare the pointer values because we
526 * don't actually care what the object is, we just need a quick check whether
527 * the object exists in the rbtree.
529 struct btrfs_swapfile_pin
{
534 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
535 * points to a struct btrfs_device.
539 * Only used when 'is_block_group' is true and it is the number of
540 * extents used by a swapfile for this block group ('ptr' field).
545 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info
*fs_info
, void *ptr
);
549 BTRFS_FS_CLOSING_START
,
550 BTRFS_FS_CLOSING_DONE
,
551 BTRFS_FS_LOG_RECOVERING
,
553 BTRFS_FS_QUOTA_ENABLED
,
554 BTRFS_FS_UPDATE_UUID_TREE_GEN
,
555 BTRFS_FS_CREATING_FREE_SPACE_TREE
,
559 BTRFS_FS_QUOTA_OVERRIDE
,
560 /* Used to record internally whether fs has been frozen */
563 * Indicate that balance has been set up from the ioctl and is in the
564 * main phase. The fs_info::balance_ctl is initialized.
566 BTRFS_FS_BALANCE_RUNNING
,
569 * Indicate that relocation of a chunk has started, it's set per chunk
570 * and is toggled between chunks.
571 * Set, tested and cleared while holding fs_info::send_reloc_lock.
573 BTRFS_FS_RELOC_RUNNING
,
575 /* Indicate that the cleaner thread is awake and doing something. */
576 BTRFS_FS_CLEANER_RUNNING
,
579 * The checksumming has an optimized version and is considered fast,
580 * so we don't need to offload checksums to workqueues.
582 BTRFS_FS_CSUM_IMPL_FAST
,
584 /* Indicate that the discard workqueue can service discards. */
585 BTRFS_FS_DISCARD_RUNNING
,
587 /* Indicate that we need to cleanup space cache v1 */
588 BTRFS_FS_CLEANUP_SPACE_CACHE_V1
,
590 /* Indicate that we can't trust the free space tree for caching yet */
591 BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED
,
593 /* Indicate whether there are any tree modification log users */
594 BTRFS_FS_TREE_MOD_LOG_USERS
,
596 /* Indicate we have half completed snapshot deletions pending. */
597 BTRFS_FS_UNFINISHED_DROPS
,
599 #if BITS_PER_LONG == 32
600 /* Indicate if we have error/warn message printed on 32bit systems */
601 BTRFS_FS_32BIT_ERROR
,
607 * Exclusive operations (device replace, resize, device add/remove, balance)
609 enum btrfs_exclusive_operation
{
611 BTRFS_EXCLOP_BALANCE
,
612 BTRFS_EXCLOP_DEV_ADD
,
613 BTRFS_EXCLOP_DEV_REMOVE
,
614 BTRFS_EXCLOP_DEV_REPLACE
,
616 BTRFS_EXCLOP_SWAP_ACTIVATE
,
619 struct btrfs_fs_info
{
620 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
622 struct btrfs_root
*extent_root
;
623 struct btrfs_root
*tree_root
;
624 struct btrfs_root
*chunk_root
;
625 struct btrfs_root
*dev_root
;
626 struct btrfs_root
*fs_root
;
627 struct btrfs_root
*csum_root
;
628 struct btrfs_root
*quota_root
;
629 struct btrfs_root
*uuid_root
;
630 struct btrfs_root
*free_space_root
;
631 struct btrfs_root
*data_reloc_root
;
633 /* the log root tree is a directory of all the other log roots */
634 struct btrfs_root
*log_root_tree
;
636 spinlock_t fs_roots_radix_lock
;
637 struct radix_tree_root fs_roots_radix
;
639 /* block group cache stuff */
640 spinlock_t block_group_cache_lock
;
641 u64 first_logical_byte
;
642 struct rb_root block_group_cache_tree
;
644 /* keep track of unallocated space */
645 atomic64_t free_chunk_space
;
647 /* Track ranges which are used by log trees blocks/logged data extents */
648 struct extent_io_tree excluded_extents
;
650 /* logical->physical extent mapping */
651 struct extent_map_tree mapping_tree
;
654 * block reservation for extent, checksum, root tree and
655 * delayed dir index item
657 struct btrfs_block_rsv global_block_rsv
;
658 /* block reservation for metadata operations */
659 struct btrfs_block_rsv trans_block_rsv
;
660 /* block reservation for chunk tree */
661 struct btrfs_block_rsv chunk_block_rsv
;
662 /* block reservation for delayed operations */
663 struct btrfs_block_rsv delayed_block_rsv
;
664 /* block reservation for delayed refs */
665 struct btrfs_block_rsv delayed_refs_rsv
;
667 struct btrfs_block_rsv empty_block_rsv
;
670 u64 last_trans_committed
;
671 u64 avg_delayed_ref_runtime
;
674 * this is updated to the current trans every time a full commit
675 * is required instead of the faster short fsync log commits
677 u64 last_trans_log_full_commit
;
678 unsigned long mount_opt
;
680 * Track requests for actions that need to be done during transaction
681 * commit (like for some mount options).
683 unsigned long pending_changes
;
684 unsigned long compress_type
:4;
685 unsigned int compress_level
;
688 * It is a suggestive number, the read side is safe even it gets a
689 * wrong number because we will write out the data into a regular
690 * extent. The write side(mount/remount) is under ->s_umount lock,
691 * so it is also safe.
695 struct btrfs_transaction
*running_transaction
;
696 wait_queue_head_t transaction_throttle
;
697 wait_queue_head_t transaction_wait
;
698 wait_queue_head_t transaction_blocked_wait
;
699 wait_queue_head_t async_submit_wait
;
702 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
703 * when they are updated.
705 * Because we do not clear the flags for ever, so we needn't use
706 * the lock on the read side.
708 * We also needn't use the lock when we mount the fs, because
709 * there is no other task which will update the flag.
711 spinlock_t super_lock
;
712 struct btrfs_super_block
*super_copy
;
713 struct btrfs_super_block
*super_for_commit
;
714 struct super_block
*sb
;
715 struct inode
*btree_inode
;
716 struct mutex tree_log_mutex
;
717 struct mutex transaction_kthread_mutex
;
718 struct mutex cleaner_mutex
;
719 struct mutex chunk_mutex
;
722 * this is taken to make sure we don't set block groups ro after
723 * the free space cache has been allocated on them
725 struct mutex ro_block_group_mutex
;
727 /* this is used during read/modify/write to make sure
728 * no two ios are trying to mod the same stripe at the same
731 struct btrfs_stripe_hash_table
*stripe_hash_table
;
734 * this protects the ordered operations list only while we are
735 * processing all of the entries on it. This way we make
736 * sure the commit code doesn't find the list temporarily empty
737 * because another function happens to be doing non-waiting preflush
738 * before jumping into the main commit.
740 struct mutex ordered_operations_mutex
;
742 struct rw_semaphore commit_root_sem
;
744 struct rw_semaphore cleanup_work_sem
;
746 struct rw_semaphore subvol_sem
;
748 spinlock_t trans_lock
;
750 * the reloc mutex goes with the trans lock, it is taken
751 * during commit to protect us from the relocation code
753 struct mutex reloc_mutex
;
755 struct list_head trans_list
;
756 struct list_head dead_roots
;
757 struct list_head caching_block_groups
;
759 spinlock_t delayed_iput_lock
;
760 struct list_head delayed_iputs
;
761 atomic_t nr_delayed_iputs
;
762 wait_queue_head_t delayed_iputs_wait
;
764 atomic64_t tree_mod_seq
;
766 /* this protects tree_mod_log and tree_mod_seq_list */
767 rwlock_t tree_mod_log_lock
;
768 struct rb_root tree_mod_log
;
769 struct list_head tree_mod_seq_list
;
771 atomic_t async_delalloc_pages
;
774 * this is used to protect the following list -- ordered_roots.
776 spinlock_t ordered_root_lock
;
779 * all fs/file tree roots in which there are data=ordered extents
780 * pending writeback are added into this list.
782 * these can span multiple transactions and basically include
783 * every dirty data page that isn't from nodatacow
785 struct list_head ordered_roots
;
787 struct mutex delalloc_root_mutex
;
788 spinlock_t delalloc_root_lock
;
789 /* all fs/file tree roots that have delalloc inodes. */
790 struct list_head delalloc_roots
;
793 * there is a pool of worker threads for checksumming during writes
794 * and a pool for checksumming after reads. This is because readers
795 * can run with FS locks held, and the writers may be waiting for
796 * those locks. We don't want ordering in the pending list to cause
797 * deadlocks, and so the two are serviced separately.
799 * A third pool does submit_bio to avoid deadlocking with the other
802 struct btrfs_workqueue
*workers
;
803 struct btrfs_workqueue
*delalloc_workers
;
804 struct btrfs_workqueue
*flush_workers
;
805 struct btrfs_workqueue
*endio_workers
;
806 struct btrfs_workqueue
*endio_meta_workers
;
807 struct btrfs_workqueue
*endio_raid56_workers
;
808 struct btrfs_workqueue
*rmw_workers
;
809 struct btrfs_workqueue
*endio_meta_write_workers
;
810 struct btrfs_workqueue
*endio_write_workers
;
811 struct btrfs_workqueue
*endio_freespace_worker
;
812 struct btrfs_workqueue
*caching_workers
;
813 struct btrfs_workqueue
*readahead_workers
;
816 * fixup workers take dirty pages that didn't properly go through
817 * the cow mechanism and make them safe to write. It happens
818 * for the sys_munmap function call path
820 struct btrfs_workqueue
*fixup_workers
;
821 struct btrfs_workqueue
*delayed_workers
;
823 struct task_struct
*transaction_kthread
;
824 struct task_struct
*cleaner_kthread
;
825 u32 thread_pool_size
;
827 struct kobject
*space_info_kobj
;
828 struct kobject
*qgroups_kobj
;
830 /* used to keep from writing metadata until there is a nice batch */
831 struct percpu_counter dirty_metadata_bytes
;
832 struct percpu_counter delalloc_bytes
;
833 struct percpu_counter ordered_bytes
;
834 s32 dirty_metadata_batch
;
837 struct list_head dirty_cowonly_roots
;
839 struct btrfs_fs_devices
*fs_devices
;
842 * The space_info list is effectively read only after initial
843 * setup. It is populated at mount time and cleaned up after
844 * all block groups are removed. RCU is used to protect it.
846 struct list_head space_info
;
848 struct btrfs_space_info
*data_sinfo
;
850 struct reloc_control
*reloc_ctl
;
852 /* data_alloc_cluster is only used in ssd_spread mode */
853 struct btrfs_free_cluster data_alloc_cluster
;
855 /* all metadata allocations go through this cluster */
856 struct btrfs_free_cluster meta_alloc_cluster
;
858 /* auto defrag inodes go here */
859 spinlock_t defrag_inodes_lock
;
860 struct rb_root defrag_inodes
;
861 atomic_t defrag_running
;
863 /* Used to protect avail_{data, metadata, system}_alloc_bits */
864 seqlock_t profiles_lock
;
866 * these three are in extended format (availability of single
867 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
868 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
870 u64 avail_data_alloc_bits
;
871 u64 avail_metadata_alloc_bits
;
872 u64 avail_system_alloc_bits
;
874 /* restriper state */
875 spinlock_t balance_lock
;
876 struct mutex balance_mutex
;
877 atomic_t balance_pause_req
;
878 atomic_t balance_cancel_req
;
879 struct btrfs_balance_control
*balance_ctl
;
880 wait_queue_head_t balance_wait_q
;
882 /* Cancellation requests for chunk relocation */
883 atomic_t reloc_cancel_req
;
885 u32 data_chunk_allocations
;
890 /* private scrub information */
891 struct mutex scrub_lock
;
892 atomic_t scrubs_running
;
893 atomic_t scrub_pause_req
;
894 atomic_t scrubs_paused
;
895 atomic_t scrub_cancel_req
;
896 wait_queue_head_t scrub_pause_wait
;
898 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
901 refcount_t scrub_workers_refcnt
;
902 struct btrfs_workqueue
*scrub_workers
;
903 struct btrfs_workqueue
*scrub_wr_completion_workers
;
904 struct btrfs_workqueue
*scrub_parity_workers
;
906 struct btrfs_discard_ctl discard_ctl
;
908 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
909 u32 check_integrity_print_mask
;
911 /* is qgroup tracking in a consistent state? */
914 /* holds configuration and tracking. Protected by qgroup_lock */
915 struct rb_root qgroup_tree
;
916 spinlock_t qgroup_lock
;
919 * used to avoid frequently calling ulist_alloc()/ulist_free()
920 * when doing qgroup accounting, it must be protected by qgroup_lock.
922 struct ulist
*qgroup_ulist
;
925 * Protect user change for quota operations. If a transaction is needed,
926 * it must be started before locking this lock.
928 struct mutex qgroup_ioctl_lock
;
930 /* list of dirty qgroups to be written at next commit */
931 struct list_head dirty_qgroups
;
933 /* used by qgroup for an efficient tree traversal */
936 /* qgroup rescan items */
937 struct mutex qgroup_rescan_lock
; /* protects the progress item */
938 struct btrfs_key qgroup_rescan_progress
;
939 struct btrfs_workqueue
*qgroup_rescan_workers
;
940 struct completion qgroup_rescan_completion
;
941 struct btrfs_work qgroup_rescan_work
;
942 bool qgroup_rescan_running
; /* protected by qgroup_rescan_lock */
944 /* filesystem state */
945 unsigned long fs_state
;
947 struct btrfs_delayed_root
*delayed_root
;
950 spinlock_t reada_lock
;
951 struct radix_tree_root reada_tree
;
953 /* readahead works cnt */
954 atomic_t reada_works_cnt
;
956 /* Extent buffer radix tree */
957 spinlock_t buffer_lock
;
958 /* Entries are eb->start / sectorsize */
959 struct radix_tree_root buffer_radix
;
961 /* next backup root to be overwritten */
962 int backup_root_index
;
964 /* device replace state */
965 struct btrfs_dev_replace dev_replace
;
967 struct semaphore uuid_tree_rescan_sem
;
969 /* Used to reclaim the metadata space in the background. */
970 struct work_struct async_reclaim_work
;
971 struct work_struct async_data_reclaim_work
;
972 struct work_struct preempt_reclaim_work
;
974 /* Reclaim partially filled block groups in the background */
975 struct work_struct reclaim_bgs_work
;
976 struct list_head reclaim_bgs
;
977 int bg_reclaim_threshold
;
979 spinlock_t unused_bgs_lock
;
980 struct list_head unused_bgs
;
981 struct mutex unused_bg_unpin_mutex
;
982 /* Protect block groups that are going to be deleted */
983 struct mutex reclaim_bgs_lock
;
985 /* Cached block sizes */
988 /* ilog2 of sectorsize, use to avoid 64bit division */
994 /* Block groups and devices containing active swapfiles. */
995 spinlock_t swapfile_pins_lock
;
996 struct rb_root swapfile_pins
;
998 struct crypto_shash
*csum_shash
;
1000 spinlock_t send_reloc_lock
;
1002 * Number of send operations in progress.
1003 * Updated while holding fs_info::send_reloc_lock.
1005 int send_in_progress
;
1007 /* Type of exclusive operation running, protected by super_lock */
1008 enum btrfs_exclusive_operation exclusive_operation
;
1011 * Zone size > 0 when in ZONED mode, otherwise it's used for a check
1012 * if the mode is enabled
1019 struct mutex zoned_meta_io_lock
;
1020 spinlock_t treelog_bg_lock
;
1024 * Start of the dedicated data relocation block group, protected by
1025 * relocation_bg_lock.
1027 spinlock_t relocation_bg_lock
;
1030 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1031 spinlock_t ref_verify_lock
;
1032 struct rb_root block_tree
;
1035 #ifdef CONFIG_BTRFS_DEBUG
1036 struct kobject
*debug_kobj
;
1037 struct kobject
*discard_debug_kobj
;
1038 struct list_head allocated_roots
;
1040 spinlock_t eb_leak_lock
;
1041 struct list_head allocated_ebs
;
1045 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
1047 return sb
->s_fs_info
;
1051 * The state of btrfs root
1055 * btrfs_record_root_in_trans is a multi-step process, and it can race
1056 * with the balancing code. But the race is very small, and only the
1057 * first time the root is added to each transaction. So IN_TRANS_SETUP
1058 * is used to tell us when more checks are required
1060 BTRFS_ROOT_IN_TRANS_SETUP
,
1063 * Set if tree blocks of this root can be shared by other roots.
1064 * Only subvolume trees and their reloc trees have this bit set.
1065 * Conflicts with TRACK_DIRTY bit.
1067 * This affects two things:
1069 * - How balance works
1070 * For shareable roots, we need to use reloc tree and do path
1071 * replacement for balance, and need various pre/post hooks for
1072 * snapshot creation to handle them.
1074 * While for non-shareable trees, we just simply do a tree search
1077 * - How dirty roots are tracked
1078 * For shareable roots, btrfs_record_root_in_trans() is needed to
1079 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1080 * don't need to set this manually.
1082 BTRFS_ROOT_SHAREABLE
,
1083 BTRFS_ROOT_TRACK_DIRTY
,
1084 BTRFS_ROOT_IN_RADIX
,
1085 BTRFS_ROOT_ORPHAN_ITEM_INSERTED
,
1086 BTRFS_ROOT_DEFRAG_RUNNING
,
1087 BTRFS_ROOT_FORCE_COW
,
1088 BTRFS_ROOT_MULTI_LOG_TASKS
,
1090 BTRFS_ROOT_DELETING
,
1093 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1095 * Set for the subvolume tree owning the reloc tree.
1097 BTRFS_ROOT_DEAD_RELOC_TREE
,
1098 /* Mark dead root stored on device whose cleanup needs to be resumed */
1099 BTRFS_ROOT_DEAD_TREE
,
1100 /* The root has a log tree. Used for subvolume roots and the tree root. */
1101 BTRFS_ROOT_HAS_LOG_TREE
,
1102 /* Qgroup flushing is in progress */
1103 BTRFS_ROOT_QGROUP_FLUSHING
,
1104 /* This root has a drop operation that was started previously. */
1105 BTRFS_ROOT_UNFINISHED_DROP
,
1108 static inline void btrfs_wake_unfinished_drop(struct btrfs_fs_info
*fs_info
)
1110 clear_and_wake_up_bit(BTRFS_FS_UNFINISHED_DROPS
, &fs_info
->flags
);
1114 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1115 * code. For detail check comment in fs/btrfs/qgroup.c.
1117 struct btrfs_qgroup_swapped_blocks
{
1119 /* RM_EMPTY_ROOT() of above blocks[] */
1121 struct rb_root blocks
[BTRFS_MAX_LEVEL
];
1125 * in ram representation of the tree. extent_root is used for all allocations
1126 * and for the extent tree extent_root root.
1129 struct extent_buffer
*node
;
1131 struct extent_buffer
*commit_root
;
1132 struct btrfs_root
*log_root
;
1133 struct btrfs_root
*reloc_root
;
1135 unsigned long state
;
1136 struct btrfs_root_item root_item
;
1137 struct btrfs_key root_key
;
1138 struct btrfs_fs_info
*fs_info
;
1139 struct extent_io_tree dirty_log_pages
;
1141 struct mutex objectid_mutex
;
1143 spinlock_t accounting_lock
;
1144 struct btrfs_block_rsv
*block_rsv
;
1146 struct mutex log_mutex
;
1147 wait_queue_head_t log_writer_wait
;
1148 wait_queue_head_t log_commit_wait
[2];
1149 struct list_head log_ctxs
[2];
1150 /* Used only for log trees of subvolumes, not for the log root tree */
1151 atomic_t log_writers
;
1152 atomic_t log_commit
[2];
1153 /* Used only for log trees of subvolumes, not for the log root tree */
1156 /* No matter the commit succeeds or not*/
1157 int log_transid_committed
;
1158 /* Just be updated when the commit succeeds. */
1159 int last_log_commit
;
1160 pid_t log_start_pid
;
1168 struct btrfs_key defrag_progress
;
1169 struct btrfs_key defrag_max
;
1171 /* The dirty list is only used by non-shareable roots */
1172 struct list_head dirty_list
;
1174 struct list_head root_list
;
1176 spinlock_t log_extents_lock
[2];
1177 struct list_head logged_list
[2];
1179 int orphan_cleanup_state
;
1181 spinlock_t inode_lock
;
1182 /* red-black tree that keeps track of in-memory inodes */
1183 struct rb_root inode_tree
;
1186 * radix tree that keeps track of delayed nodes of every inode,
1187 * protected by inode_lock
1189 struct radix_tree_root delayed_nodes_tree
;
1191 * right now this just gets used so that a root has its own devid
1192 * for stat. It may be used for more later
1196 spinlock_t root_item_lock
;
1199 struct mutex delalloc_mutex
;
1200 spinlock_t delalloc_lock
;
1202 * all of the inodes that have delalloc bytes. It is possible for
1203 * this list to be empty even when there is still dirty data=ordered
1204 * extents waiting to finish IO.
1206 struct list_head delalloc_inodes
;
1207 struct list_head delalloc_root
;
1208 u64 nr_delalloc_inodes
;
1210 struct mutex ordered_extent_mutex
;
1212 * this is used by the balancing code to wait for all the pending
1215 spinlock_t ordered_extent_lock
;
1218 * all of the data=ordered extents pending writeback
1219 * these can span multiple transactions and basically include
1220 * every dirty data page that isn't from nodatacow
1222 struct list_head ordered_extents
;
1223 struct list_head ordered_root
;
1224 u64 nr_ordered_extents
;
1227 * Not empty if this subvolume root has gone through tree block swap
1230 * Will be used by reloc_control::dirty_subvol_roots.
1232 struct list_head reloc_dirty_list
;
1235 * Number of currently running SEND ioctls to prevent
1236 * manipulation with the read-only status via SUBVOL_SETFLAGS
1238 int send_in_progress
;
1240 * Number of currently running deduplication operations that have a
1241 * destination inode belonging to this root. Protected by the lock
1244 int dedupe_in_progress
;
1245 /* For exclusion of snapshot creation and nocow writes */
1246 struct btrfs_drew_lock snapshot_lock
;
1248 atomic_t snapshot_force_cow
;
1250 /* For qgroup metadata reserved space */
1251 spinlock_t qgroup_meta_rsv_lock
;
1252 u64 qgroup_meta_rsv_pertrans
;
1253 u64 qgroup_meta_rsv_prealloc
;
1254 wait_queue_head_t qgroup_flush_wait
;
1256 /* Number of active swapfiles */
1257 atomic_t nr_swapfiles
;
1259 /* Record pairs of swapped blocks for qgroup */
1260 struct btrfs_qgroup_swapped_blocks swapped_blocks
;
1262 /* Used only by log trees, when logging csum items */
1263 struct extent_io_tree log_csum_range
;
1265 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1269 #ifdef CONFIG_BTRFS_DEBUG
1270 struct list_head leak_list
;
1275 * Structure that conveys information about an extent that is going to replace
1276 * all the extents in a file range.
1278 struct btrfs_replace_extent_info
{
1284 /* Pointer to a file extent item of type regular or prealloc. */
1287 * Set to true when attempting to replace a file range with a new extent
1288 * described by this structure, set to false when attempting to clone an
1289 * existing extent into a file range.
1292 /* Meaningful only if is_new_extent is true. */
1293 int qgroup_reserved
;
1295 * Meaningful only if is_new_extent is true.
1296 * Used to track how many extent items we have already inserted in a
1297 * subvolume tree that refer to the extent described by this structure,
1298 * so that we know when to create a new delayed ref or update an existing
1304 /* Arguments for btrfs_drop_extents() */
1305 struct btrfs_drop_extents_args
{
1306 /* Input parameters */
1309 * If NULL, btrfs_drop_extents() will allocate and free its own path.
1310 * If 'replace_extent' is true, this must not be NULL. Also the path
1311 * is always released except if 'replace_extent' is true and
1312 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case
1313 * the path is kept locked.
1315 struct btrfs_path
*path
;
1316 /* Start offset of the range to drop extents from */
1318 /* End (exclusive, last byte + 1) of the range to drop extents from */
1320 /* If true drop all the extent maps in the range */
1323 * If true it means we want to insert a new extent after dropping all
1324 * the extents in the range. If this is true, the 'extent_item_size'
1325 * parameter must be set as well and the 'extent_inserted' field will
1326 * be set to true by btrfs_drop_extents() if it could insert the new
1328 * Note: when this is set to true the path must not be NULL.
1330 bool replace_extent
;
1332 * Used if 'replace_extent' is true. Size of the file extent item to
1333 * insert after dropping all existing extents in the range
1335 u32 extent_item_size
;
1337 /* Output parameters */
1340 * Set to the minimum between the input parameter 'end' and the end
1341 * (exclusive, last byte + 1) of the last dropped extent. This is always
1342 * set even if btrfs_drop_extents() returns an error.
1346 * The number of allocated bytes found in the range. This can be smaller
1347 * than the range's length when there are holes in the range.
1351 * Only set if 'replace_extent' is true. Set to true if we were able
1352 * to insert a replacement extent after dropping all extents in the
1353 * range, otherwise set to false by btrfs_drop_extents().
1354 * Also, if btrfs_drop_extents() has set this to true it means it
1355 * returned with the path locked, otherwise if it has set this to
1356 * false it has returned with the path released.
1358 bool extent_inserted
;
1361 struct btrfs_file_private
{
1366 static inline u32
BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info
*info
)
1369 return info
->nodesize
- sizeof(struct btrfs_header
);
1372 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1374 static inline u32
BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info
*info
)
1376 return BTRFS_LEAF_DATA_SIZE(info
) - sizeof(struct btrfs_item
);
1379 static inline u32
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info
*info
)
1381 return BTRFS_LEAF_DATA_SIZE(info
) / sizeof(struct btrfs_key_ptr
);
1384 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1385 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1386 static inline u32
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info
*info
)
1388 return BTRFS_MAX_ITEM_SIZE(info
) -
1389 BTRFS_FILE_EXTENT_INLINE_DATA_START
;
1392 static inline u32
BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info
*info
)
1394 return BTRFS_MAX_ITEM_SIZE(info
) - sizeof(struct btrfs_dir_item
);
1398 * Flags for mount options.
1400 * Note: don't forget to add new options to btrfs_show_options()
1403 BTRFS_MOUNT_NODATASUM
= (1UL << 0),
1404 BTRFS_MOUNT_NODATACOW
= (1UL << 1),
1405 BTRFS_MOUNT_NOBARRIER
= (1UL << 2),
1406 BTRFS_MOUNT_SSD
= (1UL << 3),
1407 BTRFS_MOUNT_DEGRADED
= (1UL << 4),
1408 BTRFS_MOUNT_COMPRESS
= (1UL << 5),
1409 BTRFS_MOUNT_NOTREELOG
= (1UL << 6),
1410 BTRFS_MOUNT_FLUSHONCOMMIT
= (1UL << 7),
1411 BTRFS_MOUNT_SSD_SPREAD
= (1UL << 8),
1412 BTRFS_MOUNT_NOSSD
= (1UL << 9),
1413 BTRFS_MOUNT_DISCARD_SYNC
= (1UL << 10),
1414 BTRFS_MOUNT_FORCE_COMPRESS
= (1UL << 11),
1415 BTRFS_MOUNT_SPACE_CACHE
= (1UL << 12),
1416 BTRFS_MOUNT_CLEAR_CACHE
= (1UL << 13),
1417 BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED
= (1UL << 14),
1418 BTRFS_MOUNT_ENOSPC_DEBUG
= (1UL << 15),
1419 BTRFS_MOUNT_AUTO_DEFRAG
= (1UL << 16),
1420 BTRFS_MOUNT_USEBACKUPROOT
= (1UL << 17),
1421 BTRFS_MOUNT_SKIP_BALANCE
= (1UL << 18),
1422 BTRFS_MOUNT_CHECK_INTEGRITY
= (1UL << 19),
1423 BTRFS_MOUNT_CHECK_INTEGRITY_DATA
= (1UL << 20),
1424 BTRFS_MOUNT_PANIC_ON_FATAL_ERROR
= (1UL << 21),
1425 BTRFS_MOUNT_RESCAN_UUID_TREE
= (1UL << 22),
1426 BTRFS_MOUNT_FRAGMENT_DATA
= (1UL << 23),
1427 BTRFS_MOUNT_FRAGMENT_METADATA
= (1UL << 24),
1428 BTRFS_MOUNT_FREE_SPACE_TREE
= (1UL << 25),
1429 BTRFS_MOUNT_NOLOGREPLAY
= (1UL << 26),
1430 BTRFS_MOUNT_REF_VERIFY
= (1UL << 27),
1431 BTRFS_MOUNT_DISCARD_ASYNC
= (1UL << 28),
1432 BTRFS_MOUNT_IGNOREBADROOTS
= (1UL << 29),
1433 BTRFS_MOUNT_IGNOREDATACSUMS
= (1UL << 30),
1436 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1437 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1439 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1440 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1441 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1442 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1445 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1447 if (!btrfs_test_opt(fs_info, opt)) \
1448 btrfs_info(fs_info, fmt, ##args); \
1449 btrfs_set_opt(fs_info->mount_opt, opt); \
1452 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1454 if (btrfs_test_opt(fs_info, opt)) \
1455 btrfs_info(fs_info, fmt, ##args); \
1456 btrfs_clear_opt(fs_info->mount_opt, opt); \
1460 * Requests for changes that need to be done during transaction commit.
1462 * Internal mount options that are used for special handling of the real
1463 * mount options (eg. cannot be set during remount and have to be set during
1464 * transaction commit)
1467 #define BTRFS_PENDING_COMMIT (0)
1469 #define btrfs_test_pending(info, opt) \
1470 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1471 #define btrfs_set_pending(info, opt) \
1472 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1473 #define btrfs_clear_pending(info, opt) \
1474 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1477 * Helpers for setting pending mount option changes.
1479 * Expects corresponding macros
1480 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1482 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1484 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1485 btrfs_info((info), fmt, ##args); \
1486 btrfs_set_pending((info), SET_##opt); \
1487 btrfs_clear_pending((info), CLEAR_##opt); \
1491 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1493 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1494 btrfs_info((info), fmt, ##args); \
1495 btrfs_set_pending((info), CLEAR_##opt); \
1496 btrfs_clear_pending((info), SET_##opt); \
1503 #define BTRFS_INODE_NODATASUM (1U << 0)
1504 #define BTRFS_INODE_NODATACOW (1U << 1)
1505 #define BTRFS_INODE_READONLY (1U << 2)
1506 #define BTRFS_INODE_NOCOMPRESS (1U << 3)
1507 #define BTRFS_INODE_PREALLOC (1U << 4)
1508 #define BTRFS_INODE_SYNC (1U << 5)
1509 #define BTRFS_INODE_IMMUTABLE (1U << 6)
1510 #define BTRFS_INODE_APPEND (1U << 7)
1511 #define BTRFS_INODE_NODUMP (1U << 8)
1512 #define BTRFS_INODE_NOATIME (1U << 9)
1513 #define BTRFS_INODE_DIRSYNC (1U << 10)
1514 #define BTRFS_INODE_COMPRESS (1U << 11)
1516 #define BTRFS_INODE_ROOT_ITEM_INIT (1U << 31)
1518 #define BTRFS_INODE_FLAG_MASK \
1519 (BTRFS_INODE_NODATASUM | \
1520 BTRFS_INODE_NODATACOW | \
1521 BTRFS_INODE_READONLY | \
1522 BTRFS_INODE_NOCOMPRESS | \
1523 BTRFS_INODE_PREALLOC | \
1524 BTRFS_INODE_SYNC | \
1525 BTRFS_INODE_IMMUTABLE | \
1526 BTRFS_INODE_APPEND | \
1527 BTRFS_INODE_NODUMP | \
1528 BTRFS_INODE_NOATIME | \
1529 BTRFS_INODE_DIRSYNC | \
1530 BTRFS_INODE_COMPRESS | \
1531 BTRFS_INODE_ROOT_ITEM_INIT)
1533 #define BTRFS_INODE_RO_VERITY (1U << 0)
1535 #define BTRFS_INODE_RO_FLAG_MASK (BTRFS_INODE_RO_VERITY)
1537 struct btrfs_map_token
{
1538 struct extent_buffer
*eb
;
1540 unsigned long offset
;
1543 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1544 ((bytes) >> (fs_info)->sectorsize_bits)
1546 static inline void btrfs_init_map_token(struct btrfs_map_token
*token
,
1547 struct extent_buffer
*eb
)
1550 token
->kaddr
= page_address(eb
->pages
[0]);
1554 /* some macros to generate set/get functions for the struct fields. This
1555 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1558 #define le8_to_cpu(v) (v)
1559 #define cpu_to_le8(v) (v)
1562 static inline u8
get_unaligned_le8(const void *p
)
1567 static inline void put_unaligned_le8(u8 val
, void *p
)
1572 #define read_eb_member(eb, ptr, type, member, result) (\
1573 read_extent_buffer(eb, (char *)(result), \
1574 ((unsigned long)(ptr)) + \
1575 offsetof(type, member), \
1576 sizeof(((type *)0)->member)))
1578 #define write_eb_member(eb, ptr, type, member, result) (\
1579 write_extent_buffer(eb, (char *)(result), \
1580 ((unsigned long)(ptr)) + \
1581 offsetof(type, member), \
1582 sizeof(((type *)0)->member)))
1584 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1585 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1586 const void *ptr, unsigned long off); \
1587 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1588 const void *ptr, unsigned long off, \
1590 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1591 const void *ptr, unsigned long off); \
1592 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1593 unsigned long off, u##bits val);
1595 DECLARE_BTRFS_SETGET_BITS(8)
1596 DECLARE_BTRFS_SETGET_BITS(16)
1597 DECLARE_BTRFS_SETGET_BITS(32)
1598 DECLARE_BTRFS_SETGET_BITS(64)
1600 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1601 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1604 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1605 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1607 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1610 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1611 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1613 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1616 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1617 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1619 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1620 type *s, u##bits val) \
1622 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1623 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1626 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1627 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1629 const type *p = page_address(eb->pages[0]) + \
1630 offset_in_page(eb->start); \
1631 return get_unaligned_le##bits(&p->member); \
1633 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1636 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \
1637 put_unaligned_le##bits(val, &p->member); \
1640 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1641 static inline u##bits btrfs_##name(const type *s) \
1643 return get_unaligned_le##bits(&s->member); \
1645 static inline void btrfs_set_##name(type *s, u##bits val) \
1647 put_unaligned_le##bits(val, &s->member); \
1650 static inline u64
btrfs_device_total_bytes(const struct extent_buffer
*eb
,
1651 struct btrfs_dev_item
*s
)
1653 BUILD_BUG_ON(sizeof(u64
) !=
1654 sizeof(((struct btrfs_dev_item
*)0))->total_bytes
);
1655 return btrfs_get_64(eb
, s
, offsetof(struct btrfs_dev_item
,
1658 static inline void btrfs_set_device_total_bytes(const struct extent_buffer
*eb
,
1659 struct btrfs_dev_item
*s
,
1662 BUILD_BUG_ON(sizeof(u64
) !=
1663 sizeof(((struct btrfs_dev_item
*)0))->total_bytes
);
1664 WARN_ON(!IS_ALIGNED(val
, eb
->fs_info
->sectorsize
));
1665 btrfs_set_64(eb
, s
, offsetof(struct btrfs_dev_item
, total_bytes
), val
);
1669 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1670 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1671 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1672 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1673 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1675 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1676 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1677 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1678 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1679 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1680 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1682 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1683 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1685 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1687 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1689 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1691 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1693 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1694 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1696 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1698 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1700 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1703 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1705 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1708 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1710 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1713 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1714 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1715 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1716 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1717 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1718 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1719 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1720 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1721 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1722 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1723 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1725 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1727 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1730 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1731 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1732 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1734 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1736 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1738 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1740 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1741 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1743 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1745 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1746 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1748 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1751 unsigned long offset
= (unsigned long)c
;
1752 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1753 offset
+= nr
* sizeof(struct btrfs_stripe
);
1754 return (struct btrfs_stripe
*)offset
;
1757 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1759 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1762 static inline u64
btrfs_stripe_offset_nr(const struct extent_buffer
*eb
,
1763 struct btrfs_chunk
*c
, int nr
)
1765 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1768 static inline u64
btrfs_stripe_devid_nr(const struct extent_buffer
*eb
,
1769 struct btrfs_chunk
*c
, int nr
)
1771 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1774 /* struct btrfs_block_group_item */
1775 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used
, struct btrfs_block_group_item
,
1777 BTRFS_SETGET_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1779 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid
,
1780 struct btrfs_block_group_item
, chunk_objectid
, 64);
1782 BTRFS_SETGET_FUNCS(block_group_chunk_objectid
,
1783 struct btrfs_block_group_item
, chunk_objectid
, 64);
1784 BTRFS_SETGET_FUNCS(block_group_flags
,
1785 struct btrfs_block_group_item
, flags
, 64);
1786 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags
,
1787 struct btrfs_block_group_item
, flags
, 64);
1789 /* struct btrfs_free_space_info */
1790 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1792 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1794 /* struct btrfs_inode_ref */
1795 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1796 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1798 /* struct btrfs_inode_extref */
1799 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1800 parent_objectid
, 64);
1801 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1803 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1805 /* struct btrfs_inode_item */
1806 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1807 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1808 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1809 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1810 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1811 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1812 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1813 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1814 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1815 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1816 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1817 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1818 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1820 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1822 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1824 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1825 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1827 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1829 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1830 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1831 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1832 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1833 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1834 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1835 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1836 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1837 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1838 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1840 /* struct btrfs_dev_extent */
1841 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1843 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1844 chunk_objectid
, 64);
1845 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1847 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1848 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1849 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1851 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1853 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1855 static inline void btrfs_tree_block_key(const struct extent_buffer
*eb
,
1856 struct btrfs_tree_block_info
*item
,
1857 struct btrfs_disk_key
*key
)
1859 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1862 static inline void btrfs_set_tree_block_key(const struct extent_buffer
*eb
,
1863 struct btrfs_tree_block_info
*item
,
1864 struct btrfs_disk_key
*key
)
1866 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1869 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1871 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1873 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1875 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1878 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1881 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1883 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1886 static inline u32
btrfs_extent_inline_ref_size(int type
)
1888 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1889 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1890 return sizeof(struct btrfs_extent_inline_ref
);
1891 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1892 return sizeof(struct btrfs_shared_data_ref
) +
1893 sizeof(struct btrfs_extent_inline_ref
);
1894 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1895 return sizeof(struct btrfs_extent_data_ref
) +
1896 offsetof(struct btrfs_extent_inline_ref
, offset
);
1900 /* struct btrfs_node */
1901 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1902 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1903 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1905 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1908 static inline u64
btrfs_node_blockptr(const struct extent_buffer
*eb
, int nr
)
1911 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1912 sizeof(struct btrfs_key_ptr
) * nr
;
1913 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1916 static inline void btrfs_set_node_blockptr(const struct extent_buffer
*eb
,
1920 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1921 sizeof(struct btrfs_key_ptr
) * nr
;
1922 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1925 static inline u64
btrfs_node_ptr_generation(const struct extent_buffer
*eb
, int nr
)
1928 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1929 sizeof(struct btrfs_key_ptr
) * nr
;
1930 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1933 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer
*eb
,
1937 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1938 sizeof(struct btrfs_key_ptr
) * nr
;
1939 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1942 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1944 return offsetof(struct btrfs_node
, ptrs
) +
1945 sizeof(struct btrfs_key_ptr
) * nr
;
1948 void btrfs_node_key(const struct extent_buffer
*eb
,
1949 struct btrfs_disk_key
*disk_key
, int nr
);
1951 static inline void btrfs_set_node_key(const struct extent_buffer
*eb
,
1952 struct btrfs_disk_key
*disk_key
, int nr
)
1955 ptr
= btrfs_node_key_ptr_offset(nr
);
1956 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1957 struct btrfs_key_ptr
, key
, disk_key
);
1960 /* struct btrfs_item */
1961 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1962 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1963 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1964 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1966 static inline unsigned long btrfs_item_nr_offset(int nr
)
1968 return offsetof(struct btrfs_leaf
, items
) +
1969 sizeof(struct btrfs_item
) * nr
;
1972 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1974 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1977 static inline u32
btrfs_item_end(const struct extent_buffer
*eb
,
1978 struct btrfs_item
*item
)
1980 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1983 static inline u32
btrfs_item_end_nr(const struct extent_buffer
*eb
, int nr
)
1985 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1988 static inline u32
btrfs_item_offset_nr(const struct extent_buffer
*eb
, int nr
)
1990 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1993 static inline u32
btrfs_item_size_nr(const struct extent_buffer
*eb
, int nr
)
1995 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1998 static inline void btrfs_item_key(const struct extent_buffer
*eb
,
1999 struct btrfs_disk_key
*disk_key
, int nr
)
2001 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2002 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2005 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
2006 struct btrfs_disk_key
*disk_key
, int nr
)
2008 struct btrfs_item
*item
= btrfs_item_nr(nr
);
2009 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
2012 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
2015 * struct btrfs_root_ref
2017 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
2018 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
2019 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
2021 /* struct btrfs_dir_item */
2022 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
2023 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
2024 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
2025 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
2026 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
2027 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
2029 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
2031 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
2034 static inline void btrfs_dir_item_key(const struct extent_buffer
*eb
,
2035 const struct btrfs_dir_item
*item
,
2036 struct btrfs_disk_key
*key
)
2038 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2041 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
2042 struct btrfs_dir_item
*item
,
2043 const struct btrfs_disk_key
*key
)
2045 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
2048 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
2050 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
2052 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
2055 static inline void btrfs_free_space_key(const struct extent_buffer
*eb
,
2056 const struct btrfs_free_space_header
*h
,
2057 struct btrfs_disk_key
*key
)
2059 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2062 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
2063 struct btrfs_free_space_header
*h
,
2064 const struct btrfs_disk_key
*key
)
2066 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
2069 /* struct btrfs_disk_key */
2070 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
2072 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
2073 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
2075 #ifdef __LITTLE_ENDIAN
2078 * Optimized helpers for little-endian architectures where CPU and on-disk
2079 * structures have the same endianness and we can skip conversions.
2082 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu_key
,
2083 const struct btrfs_disk_key
*disk_key
)
2085 memcpy(cpu_key
, disk_key
, sizeof(struct btrfs_key
));
2088 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk_key
,
2089 const struct btrfs_key
*cpu_key
)
2091 memcpy(disk_key
, cpu_key
, sizeof(struct btrfs_key
));
2094 static inline void btrfs_node_key_to_cpu(const struct extent_buffer
*eb
,
2095 struct btrfs_key
*cpu_key
, int nr
)
2097 struct btrfs_disk_key
*disk_key
= (struct btrfs_disk_key
*)cpu_key
;
2099 btrfs_node_key(eb
, disk_key
, nr
);
2102 static inline void btrfs_item_key_to_cpu(const struct extent_buffer
*eb
,
2103 struct btrfs_key
*cpu_key
, int nr
)
2105 struct btrfs_disk_key
*disk_key
= (struct btrfs_disk_key
*)cpu_key
;
2107 btrfs_item_key(eb
, disk_key
, nr
);
2110 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer
*eb
,
2111 const struct btrfs_dir_item
*item
,
2112 struct btrfs_key
*cpu_key
)
2114 struct btrfs_disk_key
*disk_key
= (struct btrfs_disk_key
*)cpu_key
;
2116 btrfs_dir_item_key(eb
, item
, disk_key
);
2121 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
2122 const struct btrfs_disk_key
*disk
)
2124 cpu
->offset
= le64_to_cpu(disk
->offset
);
2125 cpu
->type
= disk
->type
;
2126 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
2129 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
2130 const struct btrfs_key
*cpu
)
2132 disk
->offset
= cpu_to_le64(cpu
->offset
);
2133 disk
->type
= cpu
->type
;
2134 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
2137 static inline void btrfs_node_key_to_cpu(const struct extent_buffer
*eb
,
2138 struct btrfs_key
*key
, int nr
)
2140 struct btrfs_disk_key disk_key
;
2141 btrfs_node_key(eb
, &disk_key
, nr
);
2142 btrfs_disk_key_to_cpu(key
, &disk_key
);
2145 static inline void btrfs_item_key_to_cpu(const struct extent_buffer
*eb
,
2146 struct btrfs_key
*key
, int nr
)
2148 struct btrfs_disk_key disk_key
;
2149 btrfs_item_key(eb
, &disk_key
, nr
);
2150 btrfs_disk_key_to_cpu(key
, &disk_key
);
2153 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer
*eb
,
2154 const struct btrfs_dir_item
*item
,
2155 struct btrfs_key
*key
)
2157 struct btrfs_disk_key disk_key
;
2158 btrfs_dir_item_key(eb
, item
, &disk_key
);
2159 btrfs_disk_key_to_cpu(key
, &disk_key
);
2164 /* struct btrfs_header */
2165 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2166 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2168 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2169 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2170 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2171 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2172 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2174 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2175 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2177 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2179 static inline int btrfs_header_flag(const struct extent_buffer
*eb
, u64 flag
)
2181 return (btrfs_header_flags(eb
) & flag
) == flag
;
2184 static inline void btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2186 u64 flags
= btrfs_header_flags(eb
);
2187 btrfs_set_header_flags(eb
, flags
| flag
);
2190 static inline void btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2192 u64 flags
= btrfs_header_flags(eb
);
2193 btrfs_set_header_flags(eb
, flags
& ~flag
);
2196 static inline int btrfs_header_backref_rev(const struct extent_buffer
*eb
)
2198 u64 flags
= btrfs_header_flags(eb
);
2199 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2202 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2205 u64 flags
= btrfs_header_flags(eb
);
2206 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2207 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2208 btrfs_set_header_flags(eb
, flags
);
2211 static inline int btrfs_is_leaf(const struct extent_buffer
*eb
)
2213 return btrfs_header_level(eb
) == 0;
2216 /* struct btrfs_root_item */
2217 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2219 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2220 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2221 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2223 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2225 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2226 BTRFS_SETGET_STACK_FUNCS(root_drop_level
, struct btrfs_root_item
, drop_level
, 8);
2227 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2228 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2229 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2230 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2231 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2232 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2233 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2235 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2237 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2239 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2241 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2243 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2246 static inline bool btrfs_root_readonly(const struct btrfs_root
*root
)
2248 /* Byte-swap the constant at compile time, root_item::flags is LE */
2249 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2252 static inline bool btrfs_root_dead(const struct btrfs_root
*root
)
2254 /* Byte-swap the constant at compile time, root_item::flags is LE */
2255 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2258 /* struct btrfs_root_backup */
2259 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2261 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2263 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2264 tree_root_level
, 8);
2266 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2268 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2269 chunk_root_gen
, 64);
2270 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2271 chunk_root_level
, 8);
2273 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2275 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2276 extent_root_gen
, 64);
2277 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2278 extent_root_level
, 8);
2280 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2282 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2284 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2287 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2289 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2291 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2294 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2296 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2298 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2299 csum_root_level
, 8);
2300 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2302 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2304 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2307 /* struct btrfs_balance_item */
2308 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2310 static inline void btrfs_balance_data(const struct extent_buffer
*eb
,
2311 const struct btrfs_balance_item
*bi
,
2312 struct btrfs_disk_balance_args
*ba
)
2314 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2317 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2318 struct btrfs_balance_item
*bi
,
2319 const struct btrfs_disk_balance_args
*ba
)
2321 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2324 static inline void btrfs_balance_meta(const struct extent_buffer
*eb
,
2325 const struct btrfs_balance_item
*bi
,
2326 struct btrfs_disk_balance_args
*ba
)
2328 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2331 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2332 struct btrfs_balance_item
*bi
,
2333 const struct btrfs_disk_balance_args
*ba
)
2335 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2338 static inline void btrfs_balance_sys(const struct extent_buffer
*eb
,
2339 const struct btrfs_balance_item
*bi
,
2340 struct btrfs_disk_balance_args
*ba
)
2342 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2345 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2346 struct btrfs_balance_item
*bi
,
2347 const struct btrfs_disk_balance_args
*ba
)
2349 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2353 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2354 const struct btrfs_disk_balance_args
*disk
)
2356 memset(cpu
, 0, sizeof(*cpu
));
2358 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2359 cpu
->usage
= le64_to_cpu(disk
->usage
);
2360 cpu
->devid
= le64_to_cpu(disk
->devid
);
2361 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2362 cpu
->pend
= le64_to_cpu(disk
->pend
);
2363 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2364 cpu
->vend
= le64_to_cpu(disk
->vend
);
2365 cpu
->target
= le64_to_cpu(disk
->target
);
2366 cpu
->flags
= le64_to_cpu(disk
->flags
);
2367 cpu
->limit
= le64_to_cpu(disk
->limit
);
2368 cpu
->stripes_min
= le32_to_cpu(disk
->stripes_min
);
2369 cpu
->stripes_max
= le32_to_cpu(disk
->stripes_max
);
2373 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2374 const struct btrfs_balance_args
*cpu
)
2376 memset(disk
, 0, sizeof(*disk
));
2378 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2379 disk
->usage
= cpu_to_le64(cpu
->usage
);
2380 disk
->devid
= cpu_to_le64(cpu
->devid
);
2381 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2382 disk
->pend
= cpu_to_le64(cpu
->pend
);
2383 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2384 disk
->vend
= cpu_to_le64(cpu
->vend
);
2385 disk
->target
= cpu_to_le64(cpu
->target
);
2386 disk
->flags
= cpu_to_le64(cpu
->flags
);
2387 disk
->limit
= cpu_to_le64(cpu
->limit
);
2388 disk
->stripes_min
= cpu_to_le32(cpu
->stripes_min
);
2389 disk
->stripes_max
= cpu_to_le32(cpu
->stripes_max
);
2392 /* struct btrfs_super_block */
2393 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2394 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2395 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2397 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2398 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2399 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2400 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2401 struct btrfs_super_block
, chunk_root_generation
, 64);
2402 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2404 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2406 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2407 chunk_root_level
, 8);
2408 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2410 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2411 log_root_transid
, 64);
2412 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2414 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2416 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2418 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2420 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2422 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2424 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2425 root_dir_objectid
, 64);
2426 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2428 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2430 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2431 compat_ro_flags
, 64);
2432 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2433 incompat_flags
, 64);
2434 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2436 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2437 cache_generation
, 64);
2438 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2439 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2440 uuid_tree_generation
, 64);
2442 int btrfs_super_csum_size(const struct btrfs_super_block
*s
);
2443 const char *btrfs_super_csum_name(u16 csum_type
);
2444 const char *btrfs_super_csum_driver(u16 csum_type
);
2445 size_t __attribute_const__
btrfs_get_num_csums(void);
2449 * The leaf data grows from end-to-front in the node.
2450 * this returns the address of the start of the last item,
2451 * which is the stop of the leaf data stack
2453 static inline unsigned int leaf_data_end(const struct extent_buffer
*leaf
)
2455 u32 nr
= btrfs_header_nritems(leaf
);
2458 return BTRFS_LEAF_DATA_SIZE(leaf
->fs_info
);
2459 return btrfs_item_offset_nr(leaf
, nr
- 1);
2462 /* struct btrfs_file_extent_item */
2463 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
,
2465 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2466 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2467 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2468 struct btrfs_file_extent_item
, offset
, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2470 struct btrfs_file_extent_item
, generation
, 64);
2471 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2472 struct btrfs_file_extent_item
, num_bytes
, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
,
2474 struct btrfs_file_extent_item
, ram_bytes
, 64);
2475 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2476 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2477 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2478 struct btrfs_file_extent_item
, compression
, 8);
2480 static inline unsigned long
2481 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item
*e
)
2483 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2486 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2488 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2491 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2492 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2494 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2496 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2497 disk_num_bytes
, 64);
2498 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2500 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2502 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2504 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2506 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2508 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2509 other_encoding
, 16);
2512 * this returns the number of bytes used by the item on disk, minus the
2513 * size of any extent headers. If a file is compressed on disk, this is
2514 * the compressed size
2516 static inline u32
btrfs_file_extent_inline_item_len(
2517 const struct extent_buffer
*eb
,
2518 struct btrfs_item
*e
)
2520 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2523 /* btrfs_qgroup_status_item */
2524 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2526 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2528 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2530 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2533 /* btrfs_qgroup_info_item */
2534 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2536 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2537 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2539 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2540 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2543 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2544 struct btrfs_qgroup_info_item
, generation
, 64);
2545 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2547 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2548 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2549 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2551 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2552 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2554 /* btrfs_qgroup_limit_item */
2555 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2557 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2559 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2561 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2563 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2566 /* btrfs_dev_replace_item */
2567 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2568 struct btrfs_dev_replace_item
, src_devid
, 64);
2569 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2570 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2572 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2574 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2576 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2578 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2579 num_write_errors
, 64);
2580 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2581 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2583 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2585 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2588 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2589 struct btrfs_dev_replace_item
, src_devid
, 64);
2590 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2591 struct btrfs_dev_replace_item
,
2592 cont_reading_from_srcdev_mode
, 64);
2593 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2594 struct btrfs_dev_replace_item
, replace_state
, 64);
2595 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2596 struct btrfs_dev_replace_item
, time_started
, 64);
2597 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2598 struct btrfs_dev_replace_item
, time_stopped
, 64);
2599 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2600 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2601 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2602 struct btrfs_dev_replace_item
,
2603 num_uncorrectable_read_errors
, 64);
2604 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2605 struct btrfs_dev_replace_item
, cursor_left
, 64);
2606 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2607 struct btrfs_dev_replace_item
, cursor_right
, 64);
2609 /* helper function to cast into the data area of the leaf. */
2610 #define btrfs_item_ptr(leaf, slot, type) \
2611 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2612 btrfs_item_offset_nr(leaf, slot)))
2614 #define btrfs_item_ptr_offset(leaf, slot) \
2615 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2616 btrfs_item_offset_nr(leaf, slot)))
2618 static inline u32
btrfs_crc32c(u32 crc
, const void *address
, unsigned length
)
2620 return crc32c(crc
, address
, length
);
2623 static inline void btrfs_crc32c_final(u32 crc
, u8
*result
)
2625 put_unaligned_le32(~crc
, result
);
2628 static inline u64
btrfs_name_hash(const char *name
, int len
)
2630 return crc32c((u32
)~1, name
, len
);
2634 * Figure the key offset of an extended inode ref
2636 static inline u64
btrfs_extref_hash(u64 parent_objectid
, const char *name
,
2639 return (u64
) crc32c(parent_objectid
, name
, len
);
2642 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2644 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2649 enum btrfs_inline_ref_type
{
2650 BTRFS_REF_TYPE_INVALID
,
2651 BTRFS_REF_TYPE_BLOCK
,
2652 BTRFS_REF_TYPE_DATA
,
2656 int btrfs_get_extent_inline_ref_type(const struct extent_buffer
*eb
,
2657 struct btrfs_extent_inline_ref
*iref
,
2658 enum btrfs_inline_ref_type is_data
);
2659 u64
hash_extent_data_ref(u64 root_objectid
, u64 owner
, u64 offset
);
2662 * Take the number of bytes to be checksummmed and figure out how many leaves
2663 * it would require to store the csums for that many bytes.
2665 static inline u64
btrfs_csum_bytes_to_leaves(
2666 const struct btrfs_fs_info
*fs_info
, u64 csum_bytes
)
2668 const u64 num_csums
= csum_bytes
>> fs_info
->sectorsize_bits
;
2670 return DIV_ROUND_UP_ULL(num_csums
, fs_info
->csums_per_leaf
);
2674 * Use this if we would be adding new items, as we could split nodes as we cow
2677 static inline u64
btrfs_calc_insert_metadata_size(struct btrfs_fs_info
*fs_info
,
2680 return (u64
)fs_info
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2684 * Doing a truncate or a modification won't result in new nodes or leaves, just
2685 * what we need for COW.
2687 static inline u64
btrfs_calc_metadata_size(struct btrfs_fs_info
*fs_info
,
2690 return (u64
)fs_info
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2693 int btrfs_add_excluded_extent(struct btrfs_fs_info
*fs_info
,
2694 u64 start
, u64 num_bytes
);
2695 void btrfs_free_excluded_extents(struct btrfs_block_group
*cache
);
2696 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2697 unsigned long count
);
2698 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info
*fs_info
,
2699 struct btrfs_delayed_ref_root
*delayed_refs
,
2700 struct btrfs_delayed_ref_head
*head
);
2701 int btrfs_lookup_data_extent(struct btrfs_fs_info
*fs_info
, u64 start
, u64 len
);
2702 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2703 struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2704 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2705 int btrfs_pin_extent(struct btrfs_trans_handle
*trans
, u64 bytenr
, u64 num
,
2707 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2708 u64 bytenr
, u64 num_bytes
);
2709 int btrfs_exclude_logged_extents(struct extent_buffer
*eb
);
2710 int btrfs_cross_ref_exist(struct btrfs_root
*root
,
2711 u64 objectid
, u64 offset
, u64 bytenr
, bool strict
);
2712 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2713 struct btrfs_root
*root
,
2714 u64 parent
, u64 root_objectid
,
2715 const struct btrfs_disk_key
*key
,
2716 int level
, u64 hint
,
2718 enum btrfs_lock_nesting nest
);
2719 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2720 struct btrfs_root
*root
,
2721 struct extent_buffer
*buf
,
2722 u64 parent
, int last_ref
);
2723 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2724 struct btrfs_root
*root
, u64 owner
,
2725 u64 offset
, u64 ram_bytes
,
2726 struct btrfs_key
*ins
);
2727 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2728 u64 root_objectid
, u64 owner
, u64 offset
,
2729 struct btrfs_key
*ins
);
2730 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 ram_bytes
, u64 num_bytes
,
2731 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2732 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2733 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2734 struct extent_buffer
*buf
, int full_backref
);
2735 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2736 struct extent_buffer
*buf
, int full_backref
);
2737 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2738 struct extent_buffer
*eb
, u64 flags
,
2739 int level
, int is_data
);
2740 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_ref
*ref
);
2742 int btrfs_free_reserved_extent(struct btrfs_fs_info
*fs_info
,
2743 u64 start
, u64 len
, int delalloc
);
2744 int btrfs_pin_reserved_extent(struct btrfs_trans_handle
*trans
, u64 start
,
2746 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
);
2747 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2748 struct btrfs_ref
*generic_ref
);
2750 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2753 * Different levels for to flush space when doing space reservations.
2755 * The higher the level, the more methods we try to reclaim space.
2757 enum btrfs_reserve_flush_enum
{
2758 /* If we are in the transaction, we can't flush anything.*/
2759 BTRFS_RESERVE_NO_FLUSH
,
2763 * - Running delayed inode items
2764 * - Allocating a new chunk
2766 BTRFS_RESERVE_FLUSH_LIMIT
,
2770 * - Running delayed inode items
2771 * - Running delayed refs
2772 * - Running delalloc and waiting for ordered extents
2773 * - Allocating a new chunk
2775 BTRFS_RESERVE_FLUSH_EVICT
,
2778 * Flush space by above mentioned methods and by:
2779 * - Running delayed iputs
2780 * - Committing transaction
2782 * Can be interrupted by a fatal signal.
2784 BTRFS_RESERVE_FLUSH_DATA
,
2785 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE
,
2786 BTRFS_RESERVE_FLUSH_ALL
,
2789 * Pretty much the same as FLUSH_ALL, but can also steal space from
2792 * Can be interrupted by a fatal signal.
2794 BTRFS_RESERVE_FLUSH_ALL_STEAL
,
2797 enum btrfs_flush_state
{
2798 FLUSH_DELAYED_ITEMS_NR
= 1,
2799 FLUSH_DELAYED_ITEMS
= 2,
2800 FLUSH_DELAYED_REFS_NR
= 3,
2801 FLUSH_DELAYED_REFS
= 4,
2803 FLUSH_DELALLOC_WAIT
= 6,
2804 FLUSH_DELALLOC_FULL
= 7,
2806 ALLOC_CHUNK_FORCE
= 9,
2807 RUN_DELAYED_IPUTS
= 10,
2811 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2812 struct btrfs_block_rsv
*rsv
,
2813 int nitems
, bool use_global_rsv
);
2814 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
2815 struct btrfs_block_rsv
*rsv
);
2816 void btrfs_delalloc_release_extents(struct btrfs_inode
*inode
, u64 num_bytes
);
2818 int btrfs_delalloc_reserve_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2819 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2820 int btrfs_error_unpin_extent_range(struct btrfs_fs_info
*fs_info
,
2821 u64 start
, u64 end
);
2822 int btrfs_discard_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2823 u64 num_bytes
, u64
*actual_bytes
);
2824 int btrfs_trim_fs(struct btrfs_fs_info
*fs_info
, struct fstrim_range
*range
);
2826 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2827 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2828 struct btrfs_fs_info
*fs_info
);
2829 int btrfs_start_write_no_snapshotting(struct btrfs_root
*root
);
2830 void btrfs_end_write_no_snapshotting(struct btrfs_root
*root
);
2831 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2834 int btrfs_bin_search(struct extent_buffer
*eb
, const struct btrfs_key
*key
,
2836 int __pure
btrfs_comp_cpu_keys(const struct btrfs_key
*k1
, const struct btrfs_key
*k2
);
2837 int btrfs_previous_item(struct btrfs_root
*root
,
2838 struct btrfs_path
*path
, u64 min_objectid
,
2840 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2841 struct btrfs_path
*path
, u64 min_objectid
);
2842 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2843 struct btrfs_path
*path
,
2844 const struct btrfs_key
*new_key
);
2845 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2846 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2847 struct btrfs_key
*key
, int lowest_level
,
2849 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2850 struct btrfs_path
*path
,
2852 struct extent_buffer
*btrfs_read_node_slot(struct extent_buffer
*parent
,
2855 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2856 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2857 struct extent_buffer
*parent
, int parent_slot
,
2858 struct extent_buffer
**cow_ret
,
2859 enum btrfs_lock_nesting nest
);
2860 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2861 struct btrfs_root
*root
,
2862 struct extent_buffer
*buf
,
2863 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2864 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2865 struct extent_buffer
*buf
);
2866 void btrfs_extend_item(struct btrfs_path
*path
, u32 data_size
);
2867 void btrfs_truncate_item(struct btrfs_path
*path
, u32 new_size
, int from_end
);
2868 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2869 struct btrfs_root
*root
,
2870 struct btrfs_path
*path
,
2871 const struct btrfs_key
*new_key
,
2872 unsigned long split_offset
);
2873 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2874 struct btrfs_root
*root
,
2875 struct btrfs_path
*path
,
2876 const struct btrfs_key
*new_key
);
2877 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2878 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2879 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2880 const struct btrfs_key
*key
, struct btrfs_path
*p
,
2881 int ins_len
, int cow
);
2882 int btrfs_search_old_slot(struct btrfs_root
*root
, const struct btrfs_key
*key
,
2883 struct btrfs_path
*p
, u64 time_seq
);
2884 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2885 const struct btrfs_key
*key
,
2886 struct btrfs_path
*p
, int find_higher
,
2888 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2889 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2890 int start_slot
, u64
*last_ret
,
2891 struct btrfs_key
*progress
);
2892 void btrfs_release_path(struct btrfs_path
*p
);
2893 struct btrfs_path
*btrfs_alloc_path(void);
2894 void btrfs_free_path(struct btrfs_path
*p
);
2896 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2897 struct btrfs_path
*path
, int slot
, int nr
);
2898 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2899 struct btrfs_root
*root
,
2900 struct btrfs_path
*path
)
2902 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2905 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2906 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2908 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2909 const struct btrfs_key
*key
, void *data
, u32 data_size
);
2910 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2911 struct btrfs_root
*root
,
2912 struct btrfs_path
*path
,
2913 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2916 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2917 struct btrfs_root
*root
,
2918 struct btrfs_path
*path
,
2919 const struct btrfs_key
*key
,
2922 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2925 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2926 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2929 int btrfs_search_backwards(struct btrfs_root
*root
, struct btrfs_key
*key
,
2930 struct btrfs_path
*path
);
2932 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2933 struct btrfs_path
*p
, u64 time_seq
)
2936 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2937 return btrfs_next_old_leaf(root
, p
, time_seq
);
2942 * Search the tree again to find a leaf with greater keys.
2944 * Returns 0 if it found something or 1 if there are no greater leaves.
2945 * Returns < 0 on error.
2947 static inline int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
)
2949 return btrfs_next_old_leaf(root
, path
, 0);
2952 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2954 return btrfs_next_old_item(root
, p
, 0);
2956 int btrfs_leaf_free_space(struct extent_buffer
*leaf
);
2957 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
, int update_ref
,
2959 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2960 struct btrfs_root
*root
,
2961 struct extent_buffer
*node
,
2962 struct extent_buffer
*parent
);
2963 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2966 * Do it this way so we only ever do one test_bit in the normal case.
2968 if (test_bit(BTRFS_FS_CLOSING_START
, &fs_info
->flags
)) {
2969 if (test_bit(BTRFS_FS_CLOSING_DONE
, &fs_info
->flags
))
2977 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2978 * anything except sleeping. This function is used to check the status of
2980 * We check for BTRFS_FS_STATE_RO to avoid races with a concurrent remount,
2981 * since setting and checking for SB_RDONLY in the superblock's flags is not
2984 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info
*fs_info
)
2986 return test_bit(BTRFS_FS_STATE_RO
, &fs_info
->fs_state
) ||
2987 btrfs_fs_closing(fs_info
);
2990 static inline void btrfs_set_sb_rdonly(struct super_block
*sb
)
2992 sb
->s_flags
|= SB_RDONLY
;
2993 set_bit(BTRFS_FS_STATE_RO
, &btrfs_sb(sb
)->fs_state
);
2996 static inline void btrfs_clear_sb_rdonly(struct super_block
*sb
)
2998 sb
->s_flags
&= ~SB_RDONLY
;
2999 clear_bit(BTRFS_FS_STATE_RO
, &btrfs_sb(sb
)->fs_state
);
3003 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
, u64 root_id
,
3004 u64 ref_id
, u64 dirid
, u64 sequence
, const char *name
,
3006 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
, u64 root_id
,
3007 u64 ref_id
, u64 dirid
, u64
*sequence
, const char *name
,
3009 int btrfs_del_root(struct btrfs_trans_handle
*trans
,
3010 const struct btrfs_key
*key
);
3011 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
3012 const struct btrfs_key
*key
,
3013 struct btrfs_root_item
*item
);
3014 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
3015 struct btrfs_root
*root
,
3016 struct btrfs_key
*key
,
3017 struct btrfs_root_item
*item
);
3018 int btrfs_find_root(struct btrfs_root
*root
, const struct btrfs_key
*search_key
,
3019 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
3020 struct btrfs_key
*root_key
);
3021 int btrfs_find_orphan_roots(struct btrfs_fs_info
*fs_info
);
3022 void btrfs_set_root_node(struct btrfs_root_item
*item
,
3023 struct extent_buffer
*node
);
3024 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
3025 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
3026 struct btrfs_root
*root
);
3029 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
, u8
*uuid
, u8 type
,
3031 int btrfs_uuid_tree_remove(struct btrfs_trans_handle
*trans
, u8
*uuid
, u8 type
,
3033 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
);
3036 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
3037 const char *name
, int name_len
);
3038 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, const char *name
,
3039 int name_len
, struct btrfs_inode
*dir
,
3040 struct btrfs_key
*location
, u8 type
, u64 index
);
3041 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
3042 struct btrfs_root
*root
,
3043 struct btrfs_path
*path
, u64 dir
,
3044 const char *name
, int name_len
,
3046 struct btrfs_dir_item
*
3047 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
3048 struct btrfs_root
*root
,
3049 struct btrfs_path
*path
, u64 dir
,
3050 u64 index
, const char *name
, int name_len
,
3052 struct btrfs_dir_item
*
3053 btrfs_search_dir_index_item(struct btrfs_root
*root
,
3054 struct btrfs_path
*path
, u64 dirid
,
3055 const char *name
, int name_len
);
3056 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
3057 struct btrfs_root
*root
,
3058 struct btrfs_path
*path
,
3059 struct btrfs_dir_item
*di
);
3060 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
3061 struct btrfs_root
*root
,
3062 struct btrfs_path
*path
, u64 objectid
,
3063 const char *name
, u16 name_len
,
3064 const void *data
, u16 data_len
);
3065 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
3066 struct btrfs_root
*root
,
3067 struct btrfs_path
*path
, u64 dir
,
3068 const char *name
, u16 name_len
,
3070 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_fs_info
*fs_info
,
3071 struct btrfs_path
*path
,
3076 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
3077 struct btrfs_root
*root
, u64 offset
);
3078 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
3079 struct btrfs_root
*root
, u64 offset
);
3080 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
3083 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
3084 struct btrfs_root
*root
,
3085 const char *name
, int name_len
,
3086 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
3087 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
3088 struct btrfs_root
*root
,
3089 const char *name
, int name_len
,
3090 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
3091 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
3092 struct btrfs_root
*root
,
3093 struct btrfs_path
*path
, u64 objectid
);
3094 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
3095 *root
, struct btrfs_path
*path
,
3096 struct btrfs_key
*location
, int mod
);
3098 struct btrfs_inode_extref
*
3099 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
3100 struct btrfs_root
*root
,
3101 struct btrfs_path
*path
,
3102 const char *name
, int name_len
,
3103 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
3106 struct btrfs_inode_ref
*btrfs_find_name_in_backref(struct extent_buffer
*leaf
,
3107 int slot
, const char *name
,
3109 struct btrfs_inode_extref
*btrfs_find_name_in_ext_backref(
3110 struct extent_buffer
*leaf
, int slot
, u64 ref_objectid
,
3111 const char *name
, int name_len
);
3113 struct btrfs_dio_private
;
3114 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
3115 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
3116 blk_status_t
btrfs_lookup_bio_sums(struct inode
*inode
, struct bio
*bio
, u8
*dst
);
3117 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
3118 struct btrfs_root
*root
,
3119 u64 objectid
, u64 pos
,
3120 u64 disk_offset
, u64 disk_num_bytes
,
3121 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
3122 u8 compression
, u8 encryption
, u16 other_encoding
);
3123 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
3124 struct btrfs_root
*root
,
3125 struct btrfs_path
*path
, u64 objectid
,
3126 u64 bytenr
, int mod
);
3127 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
3128 struct btrfs_root
*root
,
3129 struct btrfs_ordered_sum
*sums
);
3130 blk_status_t
btrfs_csum_one_bio(struct btrfs_inode
*inode
, struct bio
*bio
,
3131 u64 file_start
, int contig
);
3132 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
3133 struct list_head
*list
, int search_commit
);
3134 void btrfs_extent_item_to_extent_map(struct btrfs_inode
*inode
,
3135 const struct btrfs_path
*path
,
3136 struct btrfs_file_extent_item
*fi
,
3137 const bool new_inline
,
3138 struct extent_map
*em
);
3139 int btrfs_inode_clear_file_extent_range(struct btrfs_inode
*inode
, u64 start
,
3141 int btrfs_inode_set_file_extent_range(struct btrfs_inode
*inode
, u64 start
,
3143 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode
*inode
, u64 new_i_size
);
3144 u64
btrfs_file_extent_end(const struct btrfs_path
*path
);
3147 blk_status_t
btrfs_submit_data_bio(struct inode
*inode
, struct bio
*bio
,
3148 int mirror_num
, unsigned long bio_flags
);
3149 unsigned int btrfs_verify_data_csum(struct btrfs_io_bio
*io_bio
, u32 bio_offset
,
3150 struct page
*page
, u64 start
, u64 end
);
3151 struct extent_map
*btrfs_get_extent_fiemap(struct btrfs_inode
*inode
,
3152 u64 start
, u64 len
);
3153 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
3154 u64
*orig_start
, u64
*orig_block_len
,
3155 u64
*ram_bytes
, bool strict
);
3157 void __btrfs_del_delalloc_inode(struct btrfs_root
*root
,
3158 struct btrfs_inode
*inode
);
3159 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
3160 int btrfs_set_inode_index(struct btrfs_inode
*dir
, u64
*index
);
3161 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
3162 struct btrfs_root
*root
,
3163 struct btrfs_inode
*dir
, struct btrfs_inode
*inode
,
3164 const char *name
, int name_len
);
3165 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
3166 struct btrfs_inode
*parent_inode
, struct btrfs_inode
*inode
,
3167 const char *name
, int name_len
, int add_backref
, u64 index
);
3168 int btrfs_delete_subvolume(struct inode
*dir
, struct dentry
*dentry
);
3169 int btrfs_truncate_block(struct btrfs_inode
*inode
, loff_t from
, loff_t len
,
3171 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
3172 struct btrfs_root
*root
,
3173 struct btrfs_inode
*inode
, u64 new_size
,
3174 u32 min_type
, u64
*extents_found
);
3176 int btrfs_start_delalloc_snapshot(struct btrfs_root
*root
, bool in_reclaim_context
);
3177 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, long nr
,
3178 bool in_reclaim_context
);
3179 int btrfs_set_extent_delalloc(struct btrfs_inode
*inode
, u64 start
, u64 end
,
3180 unsigned int extra_bits
,
3181 struct extent_state
**cached_state
);
3182 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3183 struct btrfs_root
*new_root
,
3184 struct btrfs_root
*parent_root
,
3185 struct user_namespace
*mnt_userns
);
3186 void btrfs_set_delalloc_extent(struct inode
*inode
, struct extent_state
*state
,
3188 void btrfs_clear_delalloc_extent(struct inode
*inode
,
3189 struct extent_state
*state
, unsigned *bits
);
3190 void btrfs_merge_delalloc_extent(struct inode
*inode
, struct extent_state
*new,
3191 struct extent_state
*other
);
3192 void btrfs_split_delalloc_extent(struct inode
*inode
,
3193 struct extent_state
*orig
, u64 split
);
3194 int btrfs_bio_fits_in_stripe(struct page
*page
, size_t size
, struct bio
*bio
,
3195 unsigned long bio_flags
);
3196 void btrfs_set_range_writeback(struct btrfs_inode
*inode
, u64 start
, u64 end
);
3197 vm_fault_t
btrfs_page_mkwrite(struct vm_fault
*vmf
);
3198 int btrfs_readpage(struct file
*file
, struct page
*page
);
3199 void btrfs_evict_inode(struct inode
*inode
);
3200 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3201 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3202 void btrfs_destroy_inode(struct inode
*inode
);
3203 void btrfs_free_inode(struct inode
*inode
);
3204 int btrfs_drop_inode(struct inode
*inode
);
3205 int __init
btrfs_init_cachep(void);
3206 void __cold
btrfs_destroy_cachep(void);
3207 struct inode
*btrfs_iget_path(struct super_block
*s
, u64 ino
,
3208 struct btrfs_root
*root
, struct btrfs_path
*path
);
3209 struct inode
*btrfs_iget(struct super_block
*s
, u64 ino
, struct btrfs_root
*root
);
3210 struct extent_map
*btrfs_get_extent(struct btrfs_inode
*inode
,
3211 struct page
*page
, size_t pg_offset
,
3212 u64 start
, u64 end
);
3213 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3214 struct btrfs_root
*root
, struct btrfs_inode
*inode
);
3215 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3216 struct btrfs_root
*root
, struct btrfs_inode
*inode
);
3217 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
,
3218 struct btrfs_inode
*inode
);
3219 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3220 int btrfs_cont_expand(struct btrfs_inode
*inode
, loff_t oldsize
, loff_t size
);
3221 void btrfs_add_delayed_iput(struct inode
*inode
);
3222 void btrfs_run_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3223 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3224 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3225 u64 start
, u64 num_bytes
, u64 min_size
,
3226 loff_t actual_len
, u64
*alloc_hint
);
3227 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3228 struct btrfs_trans_handle
*trans
, int mode
,
3229 u64 start
, u64 num_bytes
, u64 min_size
,
3230 loff_t actual_len
, u64
*alloc_hint
);
3231 int btrfs_run_delalloc_range(struct btrfs_inode
*inode
, struct page
*locked_page
,
3232 u64 start
, u64 end
, int *page_started
, unsigned long *nr_written
,
3233 struct writeback_control
*wbc
);
3234 int btrfs_writepage_cow_fixup(struct page
*page
);
3235 void btrfs_writepage_endio_finish_ordered(struct btrfs_inode
*inode
,
3236 struct page
*page
, u64 start
,
3237 u64 end
, bool uptodate
);
3238 extern const struct dentry_operations btrfs_dentry_operations
;
3239 extern const struct iomap_ops btrfs_dio_iomap_ops
;
3240 extern const struct iomap_dio_ops btrfs_dio_ops
;
3242 /* Inode locking type flags, by default the exclusive lock is taken */
3243 #define BTRFS_ILOCK_SHARED (1U << 0)
3244 #define BTRFS_ILOCK_TRY (1U << 1)
3245 #define BTRFS_ILOCK_MMAP (1U << 2)
3247 int btrfs_inode_lock(struct inode
*inode
, unsigned int ilock_flags
);
3248 void btrfs_inode_unlock(struct inode
*inode
, unsigned int ilock_flags
);
3249 void btrfs_update_inode_bytes(struct btrfs_inode
*inode
,
3250 const u64 add_bytes
,
3251 const u64 del_bytes
);
3254 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3255 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3256 int btrfs_fileattr_get(struct dentry
*dentry
, struct fileattr
*fa
);
3257 int btrfs_fileattr_set(struct user_namespace
*mnt_userns
,
3258 struct dentry
*dentry
, struct fileattr
*fa
);
3259 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3260 void btrfs_sync_inode_flags_to_i_flags(struct inode
*inode
);
3261 int __pure
btrfs_is_empty_uuid(u8
*uuid
);
3262 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3263 struct btrfs_ioctl_defrag_range_args
*range
,
3264 u64 newer_than
, unsigned long max_pages
);
3265 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3266 struct btrfs_ioctl_space_info
*space
);
3267 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
,
3268 struct btrfs_ioctl_balance_args
*bargs
);
3269 bool btrfs_exclop_start(struct btrfs_fs_info
*fs_info
,
3270 enum btrfs_exclusive_operation type
);
3271 bool btrfs_exclop_start_try_lock(struct btrfs_fs_info
*fs_info
,
3272 enum btrfs_exclusive_operation type
);
3273 void btrfs_exclop_start_unlock(struct btrfs_fs_info
*fs_info
);
3274 void btrfs_exclop_finish(struct btrfs_fs_info
*fs_info
);
3277 int __init
btrfs_auto_defrag_init(void);
3278 void __cold
btrfs_auto_defrag_exit(void);
3279 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3280 struct btrfs_inode
*inode
);
3281 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3282 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3283 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3284 void btrfs_drop_extent_cache(struct btrfs_inode
*inode
, u64 start
, u64 end
,
3286 extern const struct file_operations btrfs_file_operations
;
3287 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3288 struct btrfs_root
*root
, struct btrfs_inode
*inode
,
3289 struct btrfs_drop_extents_args
*args
);
3290 int btrfs_replace_file_extents(struct btrfs_inode
*inode
,
3291 struct btrfs_path
*path
, const u64 start
,
3293 struct btrfs_replace_extent_info
*extent_info
,
3294 struct btrfs_trans_handle
**trans_out
);
3295 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3296 struct btrfs_inode
*inode
, u64 start
, u64 end
);
3297 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3298 int btrfs_dirty_pages(struct btrfs_inode
*inode
, struct page
**pages
,
3299 size_t num_pages
, loff_t pos
, size_t write_bytes
,
3300 struct extent_state
**cached
, bool noreserve
);
3301 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3302 int btrfs_check_nocow_lock(struct btrfs_inode
*inode
, loff_t pos
,
3303 size_t *write_bytes
);
3304 void btrfs_check_nocow_unlock(struct btrfs_inode
*inode
);
3307 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3308 struct btrfs_root
*root
);
3311 int btrfs_parse_options(struct btrfs_fs_info
*info
, char *options
,
3312 unsigned long new_flags
);
3313 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3314 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info
*fs_info
,
3315 u64 subvol_objectid
);
3317 static inline __printf(2, 3) __cold
3318 void btrfs_no_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3322 #ifdef CONFIG_PRINTK
3325 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3327 #define btrfs_printk(fs_info, fmt, args...) \
3328 btrfs_no_printk(fs_info, fmt, ##args)
3331 #define btrfs_emerg(fs_info, fmt, args...) \
3332 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3333 #define btrfs_alert(fs_info, fmt, args...) \
3334 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3335 #define btrfs_crit(fs_info, fmt, args...) \
3336 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3337 #define btrfs_err(fs_info, fmt, args...) \
3338 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3339 #define btrfs_warn(fs_info, fmt, args...) \
3340 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3341 #define btrfs_notice(fs_info, fmt, args...) \
3342 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3343 #define btrfs_info(fs_info, fmt, args...) \
3344 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3347 * Wrappers that use printk_in_rcu
3349 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3350 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3351 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3352 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3353 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3354 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3355 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3356 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3357 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3358 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3359 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3360 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3361 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3362 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3365 * Wrappers that use a ratelimited printk_in_rcu
3367 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3368 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3369 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3370 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3371 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3372 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3373 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3374 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3375 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3376 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3377 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3378 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3379 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3380 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3383 * Wrappers that use a ratelimited printk
3385 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3386 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3387 #define btrfs_alert_rl(fs_info, fmt, args...) \
3388 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3389 #define btrfs_crit_rl(fs_info, fmt, args...) \
3390 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3391 #define btrfs_err_rl(fs_info, fmt, args...) \
3392 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3393 #define btrfs_warn_rl(fs_info, fmt, args...) \
3394 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3395 #define btrfs_notice_rl(fs_info, fmt, args...) \
3396 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3397 #define btrfs_info_rl(fs_info, fmt, args...) \
3398 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3400 #if defined(CONFIG_DYNAMIC_DEBUG)
3401 #define btrfs_debug(fs_info, fmt, args...) \
3402 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3403 fs_info, KERN_DEBUG fmt, ##args)
3404 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3405 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3406 fs_info, KERN_DEBUG fmt, ##args)
3407 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3408 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3409 fs_info, KERN_DEBUG fmt, ##args)
3410 #define btrfs_debug_rl(fs_info, fmt, args...) \
3411 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3412 fs_info, KERN_DEBUG fmt, ##args)
3413 #elif defined(DEBUG)
3414 #define btrfs_debug(fs_info, fmt, args...) \
3415 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3416 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3417 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3418 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3419 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3420 #define btrfs_debug_rl(fs_info, fmt, args...) \
3421 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3423 #define btrfs_debug(fs_info, fmt, args...) \
3424 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3425 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3426 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3427 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3428 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3429 #define btrfs_debug_rl(fs_info, fmt, args...) \
3430 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3433 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3436 btrfs_printk(fs_info, fmt, ##args); \
3437 rcu_read_unlock(); \
3440 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3443 btrfs_no_printk(fs_info, fmt, ##args); \
3444 rcu_read_unlock(); \
3447 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3449 static DEFINE_RATELIMIT_STATE(_rs, \
3450 DEFAULT_RATELIMIT_INTERVAL, \
3451 DEFAULT_RATELIMIT_BURST); \
3452 if (__ratelimit(&_rs)) \
3453 btrfs_printk(fs_info, fmt, ##args); \
3456 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3459 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3460 rcu_read_unlock(); \
3463 #ifdef CONFIG_BTRFS_ASSERT
3465 static inline void assertfail(const char *expr
, const char *file
, int line
)
3467 pr_err("assertion failed: %s, in %s:%d\n", expr
, file
, line
);
3471 #define ASSERT(expr) \
3472 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3475 static inline void assertfail(const char *expr
, const char* file
, int line
) { }
3476 #define ASSERT(expr) (void)(expr)
3479 #if BITS_PER_LONG == 32
3480 #define BTRFS_32BIT_MAX_FILE_SIZE (((u64)ULONG_MAX + 1) << PAGE_SHIFT)
3482 * The warning threshold is 5/8th of the MAX_LFS_FILESIZE that limits the logical
3483 * addresses of extents.
3485 * For 4K page size it's about 10T, for 64K it's 160T.
3487 #define BTRFS_32BIT_EARLY_WARN_THRESHOLD (BTRFS_32BIT_MAX_FILE_SIZE * 5 / 8)
3488 void btrfs_warn_32bit_limit(struct btrfs_fs_info
*fs_info
);
3489 void btrfs_err_32bit_limit(struct btrfs_fs_info
*fs_info
);
3493 * Get the correct offset inside the page of extent buffer.
3495 * @eb: target extent buffer
3496 * @start: offset inside the extent buffer
3498 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases.
3500 static inline size_t get_eb_offset_in_page(const struct extent_buffer
*eb
,
3501 unsigned long offset
)
3504 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned
3505 * to PAGE_SIZE, thus adding it won't cause any difference.
3507 * For sectorsize < PAGE_SIZE, we must only read the data that belongs
3508 * to the eb, thus we have to take the eb->start into consideration.
3510 return offset_in_page(offset
+ eb
->start
);
3513 static inline unsigned long get_eb_page_index(unsigned long offset
)
3516 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough.
3518 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE,
3519 * and have ensured that all tree blocks are contained in one page,
3520 * thus we always get index == 0.
3522 return offset
>> PAGE_SHIFT
;
3526 * Use that for functions that are conditionally exported for sanity tests but
3529 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3530 #define EXPORT_FOR_TESTS static
3532 #define EXPORT_FOR_TESTS
3536 static inline void btrfs_print_v0_err(struct btrfs_fs_info
*fs_info
)
3539 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3544 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3545 unsigned int line
, int errno
, const char *fmt
, ...);
3547 const char * __attribute_const__
btrfs_decode_error(int errno
);
3550 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3551 const char *function
,
3552 unsigned int line
, int errno
);
3555 * Call btrfs_abort_transaction as early as possible when an error condition is
3556 * detected, that way the exact line number is reported.
3558 #define btrfs_abort_transaction(trans, errno) \
3560 /* Report first abort since mount */ \
3561 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3562 &((trans)->fs_info->fs_state))) { \
3563 if ((errno) != -EIO && (errno) != -EROFS) { \
3564 WARN(1, KERN_DEBUG \
3565 "BTRFS: Transaction aborted (error %d)\n", \
3568 btrfs_debug((trans)->fs_info, \
3569 "Transaction aborted (error %d)", \
3573 __btrfs_abort_transaction((trans), __func__, \
3574 __LINE__, (errno)); \
3577 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3579 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3580 (errno), fmt, ##args); \
3585 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3586 unsigned int line
, int errno
, const char *fmt
, ...);
3588 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3589 * will panic(). Otherwise we BUG() here.
3591 #define btrfs_panic(fs_info, errno, fmt, args...) \
3593 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3598 /* compatibility and incompatibility defines */
3600 #define btrfs_set_fs_incompat(__fs_info, opt) \
3601 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3604 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3605 u64 flag
, const char* name
)
3607 struct btrfs_super_block
*disk_super
;
3610 disk_super
= fs_info
->super_copy
;
3611 features
= btrfs_super_incompat_flags(disk_super
);
3612 if (!(features
& flag
)) {
3613 spin_lock(&fs_info
->super_lock
);
3614 features
= btrfs_super_incompat_flags(disk_super
);
3615 if (!(features
& flag
)) {
3617 btrfs_set_super_incompat_flags(disk_super
, features
);
3619 "setting incompat feature flag for %s (0x%llx)",
3622 spin_unlock(&fs_info
->super_lock
);
3626 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3627 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3630 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3631 u64 flag
, const char* name
)
3633 struct btrfs_super_block
*disk_super
;
3636 disk_super
= fs_info
->super_copy
;
3637 features
= btrfs_super_incompat_flags(disk_super
);
3638 if (features
& flag
) {
3639 spin_lock(&fs_info
->super_lock
);
3640 features
= btrfs_super_incompat_flags(disk_super
);
3641 if (features
& flag
) {
3643 btrfs_set_super_incompat_flags(disk_super
, features
);
3645 "clearing incompat feature flag for %s (0x%llx)",
3648 spin_unlock(&fs_info
->super_lock
);
3652 #define btrfs_fs_incompat(fs_info, opt) \
3653 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3655 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3657 struct btrfs_super_block
*disk_super
;
3658 disk_super
= fs_info
->super_copy
;
3659 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3662 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3663 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3666 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3667 u64 flag
, const char *name
)
3669 struct btrfs_super_block
*disk_super
;
3672 disk_super
= fs_info
->super_copy
;
3673 features
= btrfs_super_compat_ro_flags(disk_super
);
3674 if (!(features
& flag
)) {
3675 spin_lock(&fs_info
->super_lock
);
3676 features
= btrfs_super_compat_ro_flags(disk_super
);
3677 if (!(features
& flag
)) {
3679 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3681 "setting compat-ro feature flag for %s (0x%llx)",
3684 spin_unlock(&fs_info
->super_lock
);
3688 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3689 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3692 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3693 u64 flag
, const char *name
)
3695 struct btrfs_super_block
*disk_super
;
3698 disk_super
= fs_info
->super_copy
;
3699 features
= btrfs_super_compat_ro_flags(disk_super
);
3700 if (features
& flag
) {
3701 spin_lock(&fs_info
->super_lock
);
3702 features
= btrfs_super_compat_ro_flags(disk_super
);
3703 if (features
& flag
) {
3705 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3707 "clearing compat-ro feature flag for %s (0x%llx)",
3710 spin_unlock(&fs_info
->super_lock
);
3714 #define btrfs_fs_compat_ro(fs_info, opt) \
3715 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3717 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3719 struct btrfs_super_block
*disk_super
;
3720 disk_super
= fs_info
->super_copy
;
3721 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3725 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3726 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
, bool rcu
);
3727 int btrfs_set_acl(struct user_namespace
*mnt_userns
, struct inode
*inode
,
3728 struct posix_acl
*acl
, int type
);
3729 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3730 struct inode
*inode
, struct inode
*dir
);
3732 #define btrfs_get_acl NULL
3733 #define btrfs_set_acl NULL
3734 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3735 struct inode
*inode
, struct inode
*dir
)
3742 int btrfs_relocate_block_group(struct btrfs_fs_info
*fs_info
, u64 group_start
);
3743 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3744 struct btrfs_root
*root
);
3745 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3746 struct btrfs_root
*root
);
3747 int btrfs_recover_relocation(struct btrfs_root
*root
);
3748 int btrfs_reloc_clone_csums(struct btrfs_inode
*inode
, u64 file_pos
, u64 len
);
3749 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3750 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3751 struct extent_buffer
*cow
);
3752 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3753 u64
*bytes_to_reserve
);
3754 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3755 struct btrfs_pending_snapshot
*pending
);
3756 int btrfs_should_cancel_balance(struct btrfs_fs_info
*fs_info
);
3757 struct btrfs_root
*find_reloc_root(struct btrfs_fs_info
*fs_info
,
3759 int btrfs_should_ignore_reloc_root(struct btrfs_root
*root
);
3762 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3763 u64 end
, struct btrfs_scrub_progress
*progress
,
3764 int readonly
, int is_dev_replace
);
3765 void btrfs_scrub_pause(struct btrfs_fs_info
*fs_info
);
3766 void btrfs_scrub_continue(struct btrfs_fs_info
*fs_info
);
3767 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3768 int btrfs_scrub_cancel_dev(struct btrfs_device
*dev
);
3769 int btrfs_scrub_progress(struct btrfs_fs_info
*fs_info
, u64 devid
,
3770 struct btrfs_scrub_progress
*progress
);
3771 static inline void btrfs_init_full_stripe_locks_tree(
3772 struct btrfs_full_stripe_locks_tree
*locks_root
)
3774 locks_root
->root
= RB_ROOT
;
3775 mutex_init(&locks_root
->lock
);
3779 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3780 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3781 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3783 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3785 btrfs_bio_counter_sub(fs_info
, 1);
3789 struct reada_control
{
3790 struct btrfs_fs_info
*fs_info
; /* tree to prefetch */
3791 struct btrfs_key key_start
;
3792 struct btrfs_key key_end
; /* exclusive */
3795 wait_queue_head_t wait
;
3797 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3798 struct btrfs_key
*start
, struct btrfs_key
*end
);
3799 int btrfs_reada_wait(void *handle
);
3800 void btrfs_reada_detach(void *handle
);
3801 int btree_readahead_hook(struct extent_buffer
*eb
, int err
);
3802 void btrfs_reada_remove_dev(struct btrfs_device
*dev
);
3803 void btrfs_reada_undo_remove_dev(struct btrfs_device
*dev
);
3805 static inline int is_fstree(u64 rootid
)
3807 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3808 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3809 !btrfs_qgroup_level(rootid
)))
3814 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3816 return signal_pending(current
);
3820 #ifdef CONFIG_FS_VERITY
3822 extern const struct fsverity_operations btrfs_verityops
;
3823 int btrfs_drop_verity_items(struct btrfs_inode
*inode
);
3825 BTRFS_SETGET_FUNCS(verity_descriptor_encryption
, struct btrfs_verity_descriptor_item
,
3827 BTRFS_SETGET_FUNCS(verity_descriptor_size
, struct btrfs_verity_descriptor_item
,
3829 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_encryption
,
3830 struct btrfs_verity_descriptor_item
, encryption
, 8);
3831 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_size
,
3832 struct btrfs_verity_descriptor_item
, size
, 64);
3836 static inline int btrfs_drop_verity_items(struct btrfs_inode
*inode
)
3843 /* Sanity test specific functions */
3844 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3845 void btrfs_test_destroy_inode(struct inode
*inode
);
3846 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3848 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
, &fs_info
->fs_state
);
3851 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3857 static inline bool btrfs_is_zoned(const struct btrfs_fs_info
*fs_info
)
3859 return fs_info
->zoned
!= 0;
3862 static inline bool btrfs_is_data_reloc_root(const struct btrfs_root
*root
)
3864 return root
->root_key
.objectid
== BTRFS_DATA_RELOC_TREE_OBJECTID
;
3868 * We use page status Private2 to indicate there is an ordered extent with
3871 * Rename the Private2 accessors to Ordered, to improve readability.
3873 #define PageOrdered(page) PagePrivate2(page)
3874 #define SetPageOrdered(page) SetPagePrivate2(page)
3875 #define ClearPageOrdered(page) ClearPagePrivate2(page)