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/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent-io-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 * the max metadata block size. This limit is somewhat artificial,
71 * but the memmove costs go through the roof for larger blocks.
73 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
76 * we can actually store much bigger names, but lets not confuse the rest
79 #define BTRFS_NAME_LEN 255
82 * Theoretical limit is larger, but we keep this down to a sane
83 * value. That should limit greatly the possibility of collisions on
86 #define BTRFS_LINK_MAX 65535U
88 #define BTRFS_EMPTY_DIR_SIZE 0
90 /* ioprio of readahead is set to idle */
91 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
93 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
96 * Use large batch size to reduce overhead of metadata updates. On the reader
97 * side, we only read it when we are close to ENOSPC and the read overhead is
98 * mostly related to the number of CPUs, so it is OK to use arbitrary large
101 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
103 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
106 * Deltas are an effective way to populate global statistics. Give macro names
107 * to make it clear what we're doing. An example is discard_extents in
108 * btrfs_free_space_ctl.
110 #define BTRFS_STAT_NR_ENTRIES 2
111 #define BTRFS_STAT_CURR 0
112 #define BTRFS_STAT_PREV 1
115 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
117 static inline u32
count_max_extents(u64 size
)
119 return div_u64(size
+ BTRFS_MAX_EXTENT_SIZE
- 1, BTRFS_MAX_EXTENT_SIZE
);
122 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
124 BUG_ON(num_stripes
== 0);
125 return sizeof(struct btrfs_chunk
) +
126 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
130 * Runtime (in-memory) states of filesystem
133 /* Global indicator of serious filesystem errors */
134 BTRFS_FS_STATE_ERROR
,
136 * Filesystem is being remounted, allow to skip some operations, like
139 BTRFS_FS_STATE_REMOUNTING
,
140 /* Track if a transaction abort has been reported on this filesystem */
141 BTRFS_FS_STATE_TRANS_ABORTED
,
143 * Bio operations should be blocked on this filesystem because a source
144 * or target device is being destroyed as part of a device replace
146 BTRFS_FS_STATE_DEV_REPLACING
,
147 /* The btrfs_fs_info created for self-tests */
148 BTRFS_FS_STATE_DUMMY_FS_INFO
,
151 #define BTRFS_BACKREF_REV_MAX 256
152 #define BTRFS_BACKREF_REV_SHIFT 56
153 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
154 BTRFS_BACKREF_REV_SHIFT)
156 #define BTRFS_OLD_BACKREF_REV 0
157 #define BTRFS_MIXED_BACKREF_REV 1
160 * every tree block (leaf or node) starts with this header.
162 struct btrfs_header
{
163 /* these first four must match the super block */
164 u8 csum
[BTRFS_CSUM_SIZE
];
165 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
166 __le64 bytenr
; /* which block this node is supposed to live in */
169 /* allowed to be different from the super from here on down */
170 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
175 } __attribute__ ((__packed__
));
178 * this is a very generous portion of the super block, giving us
179 * room to translate 14 chunks with 3 stripes each.
181 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
184 * just in case we somehow lose the roots and are not able to mount,
185 * we store an array of the roots from previous transactions
188 #define BTRFS_NUM_BACKUP_ROOTS 4
189 struct btrfs_root_backup
{
191 __le64 tree_root_gen
;
194 __le64 chunk_root_gen
;
197 __le64 extent_root_gen
;
206 __le64 csum_root_gen
;
216 u8 extent_root_level
;
220 /* future and to align */
222 } __attribute__ ((__packed__
));
225 * the super block basically lists the main trees of the FS
226 * it currently lacks any block count etc etc
228 struct btrfs_super_block
{
229 /* the first 4 fields must match struct btrfs_header */
230 u8 csum
[BTRFS_CSUM_SIZE
];
231 /* FS specific UUID, visible to user */
232 u8 fsid
[BTRFS_FSID_SIZE
];
233 __le64 bytenr
; /* this block number */
236 /* allowed to be different from the btrfs_header from here own down */
243 /* this will help find the new super based on the log root */
244 __le64 log_root_transid
;
247 __le64 root_dir_objectid
;
251 __le32 __unused_leafsize
;
253 __le32 sys_chunk_array_size
;
254 __le64 chunk_root_generation
;
256 __le64 compat_ro_flags
;
257 __le64 incompat_flags
;
262 struct btrfs_dev_item dev_item
;
264 char label
[BTRFS_LABEL_SIZE
];
266 __le64 cache_generation
;
267 __le64 uuid_tree_generation
;
269 /* the UUID written into btree blocks */
270 u8 metadata_uuid
[BTRFS_FSID_SIZE
];
272 /* future expansion */
274 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
275 struct btrfs_root_backup super_roots
[BTRFS_NUM_BACKUP_ROOTS
];
276 } __attribute__ ((__packed__
));
279 * Compat flags that we support. If any incompat flags are set other than the
280 * ones specified below then we will fail to mount
282 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
283 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
284 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
286 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
287 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
288 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
293 #define BTRFS_FEATURE_INCOMPAT_SUPP \
294 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
295 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
296 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
297 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
298 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
299 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
300 BTRFS_FEATURE_INCOMPAT_RAID56 | \
301 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
302 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
303 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
304 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
305 BTRFS_FEATURE_INCOMPAT_RAID1C34)
307 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
308 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
309 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
312 * A leaf is full of items. offset and size tell us where to find
313 * the item in the leaf (relative to the start of the data area)
316 struct btrfs_disk_key key
;
319 } __attribute__ ((__packed__
));
322 * leaves have an item area and a data area:
323 * [item0, item1....itemN] [free space] [dataN...data1, data0]
325 * The data is separate from the items to get the keys closer together
329 struct btrfs_header header
;
330 struct btrfs_item items
[];
331 } __attribute__ ((__packed__
));
334 * all non-leaf blocks are nodes, they hold only keys and pointers to
337 struct btrfs_key_ptr
{
338 struct btrfs_disk_key key
;
341 } __attribute__ ((__packed__
));
344 struct btrfs_header header
;
345 struct btrfs_key_ptr ptrs
[];
346 } __attribute__ ((__packed__
));
349 * btrfs_paths remember the path taken from the root down to the leaf.
350 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
351 * to any other levels that are present.
353 * The slots array records the index of the item or block pointer
354 * used while walking the tree.
356 enum { READA_NONE
, READA_BACK
, READA_FORWARD
};
358 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
359 int slots
[BTRFS_MAX_LEVEL
];
360 /* if there is real range locking, this locks field will change */
361 u8 locks
[BTRFS_MAX_LEVEL
];
363 /* keep some upper locks as we walk down */
367 * set by btrfs_split_item, tells search_slot to keep all locks
368 * and to force calls to keep space in the nodes
370 unsigned int search_for_split
:1;
371 unsigned int keep_locks
:1;
372 unsigned int skip_locking
:1;
373 unsigned int leave_spinning
:1;
374 unsigned int search_commit_root
:1;
375 unsigned int need_commit_sem
:1;
376 unsigned int skip_release_on_error
:1;
377 unsigned int recurse
:1;
379 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
380 sizeof(struct btrfs_item))
381 struct btrfs_dev_replace
{
382 u64 replace_state
; /* see #define above */
383 time64_t time_started
; /* seconds since 1-Jan-1970 */
384 time64_t time_stopped
; /* seconds since 1-Jan-1970 */
385 atomic64_t num_write_errors
;
386 atomic64_t num_uncorrectable_read_errors
;
389 u64 committed_cursor_left
;
390 u64 cursor_left_last_write_of_item
;
393 u64 cont_reading_from_srcdev_mode
; /* see #define above */
396 int item_needs_writeback
;
397 struct btrfs_device
*srcdev
;
398 struct btrfs_device
*tgtdev
;
400 struct mutex lock_finishing_cancel_unmount
;
401 struct rw_semaphore rwsem
;
403 struct btrfs_scrub_progress scrub_progress
;
405 struct percpu_counter bio_counter
;
406 wait_queue_head_t replace_wait
;
410 * free clusters are used to claim free space in relatively large chunks,
411 * allowing us to do less seeky writes. They are used for all metadata
412 * allocations. In ssd_spread mode they are also used for data allocations.
414 struct btrfs_free_cluster
{
416 spinlock_t refill_lock
;
419 /* largest extent in this cluster */
422 /* first extent starting offset */
425 /* We did a full search and couldn't create a cluster */
428 struct btrfs_block_group
*block_group
;
430 * when a cluster is allocated from a block group, we put the
431 * cluster onto a list in the block group so that it can
432 * be freed before the block group is freed.
434 struct list_head block_group_list
;
437 enum btrfs_caching_type
{
441 BTRFS_CACHE_FINISHED
,
446 * Tree to record all locked full stripes of a RAID5/6 block group
448 struct btrfs_full_stripe_locks_tree
{
453 /* Discard control. */
455 * Async discard uses multiple lists to differentiate the discard filter
456 * parameters. Index 0 is for completely free block groups where we need to
457 * ensure the entire block group is trimmed without being lossy. Indices
458 * afterwards represent monotonically decreasing discard filter sizes to
459 * prioritize what should be discarded next.
461 #define BTRFS_NR_DISCARD_LISTS 3
462 #define BTRFS_DISCARD_INDEX_UNUSED 0
463 #define BTRFS_DISCARD_INDEX_START 1
465 struct btrfs_discard_ctl
{
466 struct workqueue_struct
*discard_workers
;
467 struct delayed_work work
;
469 struct btrfs_block_group
*block_group
;
470 struct list_head discard_list
[BTRFS_NR_DISCARD_LISTS
];
472 atomic_t discardable_extents
;
473 atomic64_t discardable_bytes
;
474 u64 max_discard_size
;
478 u64 discard_extent_bytes
;
479 u64 discard_bitmap_bytes
;
480 atomic64_t discard_bytes_saved
;
483 /* delayed seq elem */
485 struct list_head list
;
489 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
491 #define SEQ_LAST ((u64)-1)
493 enum btrfs_orphan_cleanup_state
{
494 ORPHAN_CLEANUP_STARTED
= 1,
495 ORPHAN_CLEANUP_DONE
= 2,
498 void btrfs_init_async_reclaim_work(struct btrfs_fs_info
*fs_info
);
501 struct reloc_control
;
503 struct btrfs_fs_devices
;
504 struct btrfs_balance_control
;
505 struct btrfs_delayed_root
;
508 * Block group or device which contains an active swapfile. Used for preventing
509 * unsafe operations while a swapfile is active.
511 * These are sorted on (ptr, inode) (note that a block group or device can
512 * contain more than one swapfile). We compare the pointer values because we
513 * don't actually care what the object is, we just need a quick check whether
514 * the object exists in the rbtree.
516 struct btrfs_swapfile_pin
{
521 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
522 * points to a struct btrfs_device.
527 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info
*fs_info
, void *ptr
);
531 BTRFS_FS_CLOSING_START
,
532 BTRFS_FS_CLOSING_DONE
,
533 BTRFS_FS_LOG_RECOVERING
,
535 BTRFS_FS_QUOTA_ENABLED
,
536 BTRFS_FS_UPDATE_UUID_TREE_GEN
,
537 BTRFS_FS_CREATING_FREE_SPACE_TREE
,
541 BTRFS_FS_QUOTA_OVERRIDE
,
542 /* Used to record internally whether fs has been frozen */
545 * Indicate that balance has been set up from the ioctl and is in the
546 * main phase. The fs_info::balance_ctl is initialized.
547 * Set and cleared while holding fs_info::balance_mutex.
549 BTRFS_FS_BALANCE_RUNNING
,
551 /* Indicate that the cleaner thread is awake and doing something. */
552 BTRFS_FS_CLEANER_RUNNING
,
555 * The checksumming has an optimized version and is considered fast,
556 * so we don't need to offload checksums to workqueues.
558 BTRFS_FS_CSUM_IMPL_FAST
,
560 /* Indicate that the discard workqueue can service discards. */
561 BTRFS_FS_DISCARD_RUNNING
,
565 * Exclusive operations (device replace, resize, device add/remove, balance)
567 enum btrfs_exclusive_operation
{
569 BTRFS_EXCLOP_BALANCE
,
570 BTRFS_EXCLOP_DEV_ADD
,
571 BTRFS_EXCLOP_DEV_REMOVE
,
572 BTRFS_EXCLOP_DEV_REPLACE
,
574 BTRFS_EXCLOP_SWAP_ACTIVATE
,
577 struct btrfs_fs_info
{
578 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
580 struct btrfs_root
*extent_root
;
581 struct btrfs_root
*tree_root
;
582 struct btrfs_root
*chunk_root
;
583 struct btrfs_root
*dev_root
;
584 struct btrfs_root
*fs_root
;
585 struct btrfs_root
*csum_root
;
586 struct btrfs_root
*quota_root
;
587 struct btrfs_root
*uuid_root
;
588 struct btrfs_root
*free_space_root
;
589 struct btrfs_root
*data_reloc_root
;
591 /* the log root tree is a directory of all the other log roots */
592 struct btrfs_root
*log_root_tree
;
594 spinlock_t fs_roots_radix_lock
;
595 struct radix_tree_root fs_roots_radix
;
597 /* block group cache stuff */
598 spinlock_t block_group_cache_lock
;
599 u64 first_logical_byte
;
600 struct rb_root block_group_cache_tree
;
602 /* keep track of unallocated space */
603 atomic64_t free_chunk_space
;
605 /* Track ranges which are used by log trees blocks/logged data extents */
606 struct extent_io_tree excluded_extents
;
608 /* logical->physical extent mapping */
609 struct extent_map_tree mapping_tree
;
612 * block reservation for extent, checksum, root tree and
613 * delayed dir index item
615 struct btrfs_block_rsv global_block_rsv
;
616 /* block reservation for metadata operations */
617 struct btrfs_block_rsv trans_block_rsv
;
618 /* block reservation for chunk tree */
619 struct btrfs_block_rsv chunk_block_rsv
;
620 /* block reservation for delayed operations */
621 struct btrfs_block_rsv delayed_block_rsv
;
622 /* block reservation for delayed refs */
623 struct btrfs_block_rsv delayed_refs_rsv
;
625 struct btrfs_block_rsv empty_block_rsv
;
628 u64 last_trans_committed
;
629 u64 avg_delayed_ref_runtime
;
632 * this is updated to the current trans every time a full commit
633 * is required instead of the faster short fsync log commits
635 u64 last_trans_log_full_commit
;
636 unsigned long mount_opt
;
638 * Track requests for actions that need to be done during transaction
639 * commit (like for some mount options).
641 unsigned long pending_changes
;
642 unsigned long compress_type
:4;
643 unsigned int compress_level
;
646 * It is a suggestive number, the read side is safe even it gets a
647 * wrong number because we will write out the data into a regular
648 * extent. The write side(mount/remount) is under ->s_umount lock,
649 * so it is also safe.
653 struct btrfs_transaction
*running_transaction
;
654 wait_queue_head_t transaction_throttle
;
655 wait_queue_head_t transaction_wait
;
656 wait_queue_head_t transaction_blocked_wait
;
657 wait_queue_head_t async_submit_wait
;
660 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
661 * when they are updated.
663 * Because we do not clear the flags for ever, so we needn't use
664 * the lock on the read side.
666 * We also needn't use the lock when we mount the fs, because
667 * there is no other task which will update the flag.
669 spinlock_t super_lock
;
670 struct btrfs_super_block
*super_copy
;
671 struct btrfs_super_block
*super_for_commit
;
672 struct super_block
*sb
;
673 struct inode
*btree_inode
;
674 struct mutex tree_log_mutex
;
675 struct mutex transaction_kthread_mutex
;
676 struct mutex cleaner_mutex
;
677 struct mutex chunk_mutex
;
680 * this is taken to make sure we don't set block groups ro after
681 * the free space cache has been allocated on them
683 struct mutex ro_block_group_mutex
;
685 /* this is used during read/modify/write to make sure
686 * no two ios are trying to mod the same stripe at the same
689 struct btrfs_stripe_hash_table
*stripe_hash_table
;
692 * this protects the ordered operations list only while we are
693 * processing all of the entries on it. This way we make
694 * sure the commit code doesn't find the list temporarily empty
695 * because another function happens to be doing non-waiting preflush
696 * before jumping into the main commit.
698 struct mutex ordered_operations_mutex
;
700 struct rw_semaphore commit_root_sem
;
702 struct rw_semaphore cleanup_work_sem
;
704 struct rw_semaphore subvol_sem
;
706 spinlock_t trans_lock
;
708 * the reloc mutex goes with the trans lock, it is taken
709 * during commit to protect us from the relocation code
711 struct mutex reloc_mutex
;
713 struct list_head trans_list
;
714 struct list_head dead_roots
;
715 struct list_head caching_block_groups
;
717 spinlock_t delayed_iput_lock
;
718 struct list_head delayed_iputs
;
719 atomic_t nr_delayed_iputs
;
720 wait_queue_head_t delayed_iputs_wait
;
722 atomic64_t tree_mod_seq
;
724 /* this protects tree_mod_log and tree_mod_seq_list */
725 rwlock_t tree_mod_log_lock
;
726 struct rb_root tree_mod_log
;
727 struct list_head tree_mod_seq_list
;
729 atomic_t async_delalloc_pages
;
732 * this is used to protect the following list -- ordered_roots.
734 spinlock_t ordered_root_lock
;
737 * all fs/file tree roots in which there are data=ordered extents
738 * pending writeback are added into this list.
740 * these can span multiple transactions and basically include
741 * every dirty data page that isn't from nodatacow
743 struct list_head ordered_roots
;
745 struct mutex delalloc_root_mutex
;
746 spinlock_t delalloc_root_lock
;
747 /* all fs/file tree roots that have delalloc inodes. */
748 struct list_head delalloc_roots
;
751 * there is a pool of worker threads for checksumming during writes
752 * and a pool for checksumming after reads. This is because readers
753 * can run with FS locks held, and the writers may be waiting for
754 * those locks. We don't want ordering in the pending list to cause
755 * deadlocks, and so the two are serviced separately.
757 * A third pool does submit_bio to avoid deadlocking with the other
760 struct btrfs_workqueue
*workers
;
761 struct btrfs_workqueue
*delalloc_workers
;
762 struct btrfs_workqueue
*flush_workers
;
763 struct btrfs_workqueue
*endio_workers
;
764 struct btrfs_workqueue
*endio_meta_workers
;
765 struct btrfs_workqueue
*endio_raid56_workers
;
766 struct btrfs_workqueue
*rmw_workers
;
767 struct btrfs_workqueue
*endio_meta_write_workers
;
768 struct btrfs_workqueue
*endio_write_workers
;
769 struct btrfs_workqueue
*endio_freespace_worker
;
770 struct btrfs_workqueue
*caching_workers
;
771 struct btrfs_workqueue
*readahead_workers
;
774 * fixup workers take dirty pages that didn't properly go through
775 * the cow mechanism and make them safe to write. It happens
776 * for the sys_munmap function call path
778 struct btrfs_workqueue
*fixup_workers
;
779 struct btrfs_workqueue
*delayed_workers
;
781 struct task_struct
*transaction_kthread
;
782 struct task_struct
*cleaner_kthread
;
783 u32 thread_pool_size
;
785 struct kobject
*space_info_kobj
;
786 struct kobject
*qgroups_kobj
;
790 /* used to keep from writing metadata until there is a nice batch */
791 struct percpu_counter dirty_metadata_bytes
;
792 struct percpu_counter delalloc_bytes
;
793 struct percpu_counter dio_bytes
;
794 s32 dirty_metadata_batch
;
797 struct list_head dirty_cowonly_roots
;
799 struct btrfs_fs_devices
*fs_devices
;
802 * The space_info list is effectively read only after initial
803 * setup. It is populated at mount time and cleaned up after
804 * all block groups are removed. RCU is used to protect it.
806 struct list_head space_info
;
808 struct btrfs_space_info
*data_sinfo
;
810 struct reloc_control
*reloc_ctl
;
812 /* data_alloc_cluster is only used in ssd_spread mode */
813 struct btrfs_free_cluster data_alloc_cluster
;
815 /* all metadata allocations go through this cluster */
816 struct btrfs_free_cluster meta_alloc_cluster
;
818 /* auto defrag inodes go here */
819 spinlock_t defrag_inodes_lock
;
820 struct rb_root defrag_inodes
;
821 atomic_t defrag_running
;
823 /* Used to protect avail_{data, metadata, system}_alloc_bits */
824 seqlock_t profiles_lock
;
826 * these three are in extended format (availability of single
827 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
828 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
830 u64 avail_data_alloc_bits
;
831 u64 avail_metadata_alloc_bits
;
832 u64 avail_system_alloc_bits
;
834 /* restriper state */
835 spinlock_t balance_lock
;
836 struct mutex balance_mutex
;
837 atomic_t balance_pause_req
;
838 atomic_t balance_cancel_req
;
839 struct btrfs_balance_control
*balance_ctl
;
840 wait_queue_head_t balance_wait_q
;
842 u32 data_chunk_allocations
;
847 /* private scrub information */
848 struct mutex scrub_lock
;
849 atomic_t scrubs_running
;
850 atomic_t scrub_pause_req
;
851 atomic_t scrubs_paused
;
852 atomic_t scrub_cancel_req
;
853 wait_queue_head_t scrub_pause_wait
;
855 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
858 refcount_t scrub_workers_refcnt
;
859 struct btrfs_workqueue
*scrub_workers
;
860 struct btrfs_workqueue
*scrub_wr_completion_workers
;
861 struct btrfs_workqueue
*scrub_parity_workers
;
863 struct btrfs_discard_ctl discard_ctl
;
865 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
866 u32 check_integrity_print_mask
;
868 /* is qgroup tracking in a consistent state? */
871 /* holds configuration and tracking. Protected by qgroup_lock */
872 struct rb_root qgroup_tree
;
873 spinlock_t qgroup_lock
;
876 * used to avoid frequently calling ulist_alloc()/ulist_free()
877 * when doing qgroup accounting, it must be protected by qgroup_lock.
879 struct ulist
*qgroup_ulist
;
881 /* protect user change for quota operations */
882 struct mutex qgroup_ioctl_lock
;
884 /* list of dirty qgroups to be written at next commit */
885 struct list_head dirty_qgroups
;
887 /* used by qgroup for an efficient tree traversal */
890 /* qgroup rescan items */
891 struct mutex qgroup_rescan_lock
; /* protects the progress item */
892 struct btrfs_key qgroup_rescan_progress
;
893 struct btrfs_workqueue
*qgroup_rescan_workers
;
894 struct completion qgroup_rescan_completion
;
895 struct btrfs_work qgroup_rescan_work
;
896 bool qgroup_rescan_running
; /* protected by qgroup_rescan_lock */
898 /* filesystem state */
899 unsigned long fs_state
;
901 struct btrfs_delayed_root
*delayed_root
;
904 spinlock_t reada_lock
;
905 struct radix_tree_root reada_tree
;
907 /* readahead works cnt */
908 atomic_t reada_works_cnt
;
910 /* Extent buffer radix tree */
911 spinlock_t buffer_lock
;
912 struct radix_tree_root buffer_radix
;
914 /* next backup root to be overwritten */
915 int backup_root_index
;
917 /* device replace state */
918 struct btrfs_dev_replace dev_replace
;
920 struct semaphore uuid_tree_rescan_sem
;
922 /* Used to reclaim the metadata space in the background. */
923 struct work_struct async_reclaim_work
;
924 struct work_struct async_data_reclaim_work
;
926 spinlock_t unused_bgs_lock
;
927 struct list_head unused_bgs
;
928 struct mutex unused_bg_unpin_mutex
;
929 struct mutex delete_unused_bgs_mutex
;
931 /* Cached block sizes */
936 /* Block groups and devices containing active swapfiles. */
937 spinlock_t swapfile_pins_lock
;
938 struct rb_root swapfile_pins
;
940 struct crypto_shash
*csum_shash
;
943 * Number of send operations in progress.
944 * Updated while holding fs_info::balance_mutex.
946 int send_in_progress
;
948 /* Type of exclusive operation running */
949 unsigned long exclusive_operation
;
951 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
952 spinlock_t ref_verify_lock
;
953 struct rb_root block_tree
;
956 #ifdef CONFIG_BTRFS_DEBUG
957 struct kobject
*debug_kobj
;
958 struct kobject
*discard_debug_kobj
;
959 struct list_head allocated_roots
;
961 spinlock_t eb_leak_lock
;
962 struct list_head allocated_ebs
;
966 static inline struct btrfs_fs_info
*btrfs_sb(struct super_block
*sb
)
968 return sb
->s_fs_info
;
972 * The state of btrfs root
976 * btrfs_record_root_in_trans is a multi-step process, and it can race
977 * with the balancing code. But the race is very small, and only the
978 * first time the root is added to each transaction. So IN_TRANS_SETUP
979 * is used to tell us when more checks are required
981 BTRFS_ROOT_IN_TRANS_SETUP
,
984 * Set if tree blocks of this root can be shared by other roots.
985 * Only subvolume trees and their reloc trees have this bit set.
986 * Conflicts with TRACK_DIRTY bit.
988 * This affects two things:
990 * - How balance works
991 * For shareable roots, we need to use reloc tree and do path
992 * replacement for balance, and need various pre/post hooks for
993 * snapshot creation to handle them.
995 * While for non-shareable trees, we just simply do a tree search
998 * - How dirty roots are tracked
999 * For shareable roots, btrfs_record_root_in_trans() is needed to
1000 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1001 * don't need to set this manually.
1003 BTRFS_ROOT_SHAREABLE
,
1004 BTRFS_ROOT_TRACK_DIRTY
,
1005 BTRFS_ROOT_IN_RADIX
,
1006 BTRFS_ROOT_ORPHAN_ITEM_INSERTED
,
1007 BTRFS_ROOT_DEFRAG_RUNNING
,
1008 BTRFS_ROOT_FORCE_COW
,
1009 BTRFS_ROOT_MULTI_LOG_TASKS
,
1011 BTRFS_ROOT_DELETING
,
1014 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1016 * Set for the subvolume tree owning the reloc tree.
1018 BTRFS_ROOT_DEAD_RELOC_TREE
,
1019 /* Mark dead root stored on device whose cleanup needs to be resumed */
1020 BTRFS_ROOT_DEAD_TREE
,
1021 /* The root has a log tree. Used only for subvolume roots. */
1022 BTRFS_ROOT_HAS_LOG_TREE
,
1023 /* Qgroup flushing is in progress */
1024 BTRFS_ROOT_QGROUP_FLUSHING
,
1028 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1029 * code. For detail check comment in fs/btrfs/qgroup.c.
1031 struct btrfs_qgroup_swapped_blocks
{
1033 /* RM_EMPTY_ROOT() of above blocks[] */
1035 struct rb_root blocks
[BTRFS_MAX_LEVEL
];
1039 * in ram representation of the tree. extent_root is used for all allocations
1040 * and for the extent tree extent_root root.
1043 struct extent_buffer
*node
;
1045 struct extent_buffer
*commit_root
;
1046 struct btrfs_root
*log_root
;
1047 struct btrfs_root
*reloc_root
;
1049 unsigned long state
;
1050 struct btrfs_root_item root_item
;
1051 struct btrfs_key root_key
;
1052 struct btrfs_fs_info
*fs_info
;
1053 struct extent_io_tree dirty_log_pages
;
1055 struct mutex objectid_mutex
;
1057 spinlock_t accounting_lock
;
1058 struct btrfs_block_rsv
*block_rsv
;
1060 /* free ino cache stuff */
1061 struct btrfs_free_space_ctl
*free_ino_ctl
;
1062 enum btrfs_caching_type ino_cache_state
;
1063 spinlock_t ino_cache_lock
;
1064 wait_queue_head_t ino_cache_wait
;
1065 struct btrfs_free_space_ctl
*free_ino_pinned
;
1066 u64 ino_cache_progress
;
1067 struct inode
*ino_cache_inode
;
1069 struct mutex log_mutex
;
1070 wait_queue_head_t log_writer_wait
;
1071 wait_queue_head_t log_commit_wait
[2];
1072 struct list_head log_ctxs
[2];
1073 /* Used only for log trees of subvolumes, not for the log root tree */
1074 atomic_t log_writers
;
1075 atomic_t log_commit
[2];
1076 /* Used only for log trees of subvolumes, not for the log root tree */
1079 /* No matter the commit succeeds or not*/
1080 int log_transid_committed
;
1081 /* Just be updated when the commit succeeds. */
1082 int last_log_commit
;
1083 pid_t log_start_pid
;
1089 u64 highest_objectid
;
1091 struct btrfs_key defrag_progress
;
1092 struct btrfs_key defrag_max
;
1094 /* The dirty list is only used by non-shareable roots */
1095 struct list_head dirty_list
;
1097 struct list_head root_list
;
1099 spinlock_t log_extents_lock
[2];
1100 struct list_head logged_list
[2];
1102 int orphan_cleanup_state
;
1104 spinlock_t inode_lock
;
1105 /* red-black tree that keeps track of in-memory inodes */
1106 struct rb_root inode_tree
;
1109 * radix tree that keeps track of delayed nodes of every inode,
1110 * protected by inode_lock
1112 struct radix_tree_root delayed_nodes_tree
;
1114 * right now this just gets used so that a root has its own devid
1115 * for stat. It may be used for more later
1119 spinlock_t root_item_lock
;
1122 struct mutex delalloc_mutex
;
1123 spinlock_t delalloc_lock
;
1125 * all of the inodes that have delalloc bytes. It is possible for
1126 * this list to be empty even when there is still dirty data=ordered
1127 * extents waiting to finish IO.
1129 struct list_head delalloc_inodes
;
1130 struct list_head delalloc_root
;
1131 u64 nr_delalloc_inodes
;
1133 struct mutex ordered_extent_mutex
;
1135 * this is used by the balancing code to wait for all the pending
1138 spinlock_t ordered_extent_lock
;
1141 * all of the data=ordered extents pending writeback
1142 * these can span multiple transactions and basically include
1143 * every dirty data page that isn't from nodatacow
1145 struct list_head ordered_extents
;
1146 struct list_head ordered_root
;
1147 u64 nr_ordered_extents
;
1150 * Not empty if this subvolume root has gone through tree block swap
1153 * Will be used by reloc_control::dirty_subvol_roots.
1155 struct list_head reloc_dirty_list
;
1158 * Number of currently running SEND ioctls to prevent
1159 * manipulation with the read-only status via SUBVOL_SETFLAGS
1161 int send_in_progress
;
1163 * Number of currently running deduplication operations that have a
1164 * destination inode belonging to this root. Protected by the lock
1167 int dedupe_in_progress
;
1168 /* For exclusion of snapshot creation and nocow writes */
1169 struct btrfs_drew_lock snapshot_lock
;
1171 atomic_t snapshot_force_cow
;
1173 /* For qgroup metadata reserved space */
1174 spinlock_t qgroup_meta_rsv_lock
;
1175 u64 qgroup_meta_rsv_pertrans
;
1176 u64 qgroup_meta_rsv_prealloc
;
1177 wait_queue_head_t qgroup_flush_wait
;
1179 /* Number of active swapfiles */
1180 atomic_t nr_swapfiles
;
1182 /* Record pairs of swapped blocks for qgroup */
1183 struct btrfs_qgroup_swapped_blocks swapped_blocks
;
1185 /* Used only by log trees, when logging csum items */
1186 struct extent_io_tree log_csum_range
;
1188 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1192 #ifdef CONFIG_BTRFS_DEBUG
1193 struct list_head leak_list
;
1198 * Structure that conveys information about an extent that is going to replace
1199 * all the extents in a file range.
1201 struct btrfs_replace_extent_info
{
1207 /* Pointer to a file extent item of type regular or prealloc. */
1210 * Set to true when attempting to replace a file range with a new extent
1211 * described by this structure, set to false when attempting to clone an
1212 * existing extent into a file range.
1215 /* Meaningful only if is_new_extent is true. */
1216 int qgroup_reserved
;
1218 * Meaningful only if is_new_extent is true.
1219 * Used to track how many extent items we have already inserted in a
1220 * subvolume tree that refer to the extent described by this structure,
1221 * so that we know when to create a new delayed ref or update an existing
1227 struct btrfs_file_private
{
1232 static inline u32
BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info
*info
)
1235 return info
->nodesize
- sizeof(struct btrfs_header
);
1238 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1240 static inline u32
BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info
*info
)
1242 return BTRFS_LEAF_DATA_SIZE(info
) - sizeof(struct btrfs_item
);
1245 static inline u32
BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info
*info
)
1247 return BTRFS_LEAF_DATA_SIZE(info
) / sizeof(struct btrfs_key_ptr
);
1250 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1251 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1252 static inline u32
BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info
*info
)
1254 return BTRFS_MAX_ITEM_SIZE(info
) -
1255 BTRFS_FILE_EXTENT_INLINE_DATA_START
;
1258 static inline u32
BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info
*info
)
1260 return BTRFS_MAX_ITEM_SIZE(info
) - sizeof(struct btrfs_dir_item
);
1264 * Flags for mount options.
1266 * Note: don't forget to add new options to btrfs_show_options()
1268 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1269 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1270 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1271 #define BTRFS_MOUNT_SSD (1 << 3)
1272 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1273 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1274 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1275 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1276 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1277 #define BTRFS_MOUNT_NOSSD (1 << 9)
1278 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1279 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1280 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1281 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1282 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1283 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1284 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1285 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1286 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1287 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1288 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1289 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1290 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1291 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1292 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1293 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1294 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1295 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1296 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1297 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1299 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1300 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1302 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1303 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1304 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1305 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1308 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1310 if (!btrfs_test_opt(fs_info, opt)) \
1311 btrfs_info(fs_info, fmt, ##args); \
1312 btrfs_set_opt(fs_info->mount_opt, opt); \
1315 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1317 if (btrfs_test_opt(fs_info, opt)) \
1318 btrfs_info(fs_info, fmt, ##args); \
1319 btrfs_clear_opt(fs_info->mount_opt, opt); \
1323 * Requests for changes that need to be done during transaction commit.
1325 * Internal mount options that are used for special handling of the real
1326 * mount options (eg. cannot be set during remount and have to be set during
1327 * transaction commit)
1330 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1331 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1332 #define BTRFS_PENDING_COMMIT (2)
1334 #define btrfs_test_pending(info, opt) \
1335 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1336 #define btrfs_set_pending(info, opt) \
1337 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1338 #define btrfs_clear_pending(info, opt) \
1339 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1342 * Helpers for setting pending mount option changes.
1344 * Expects corresponding macros
1345 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1347 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1349 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1350 btrfs_info((info), fmt, ##args); \
1351 btrfs_set_pending((info), SET_##opt); \
1352 btrfs_clear_pending((info), CLEAR_##opt); \
1356 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1358 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1359 btrfs_info((info), fmt, ##args); \
1360 btrfs_set_pending((info), CLEAR_##opt); \
1361 btrfs_clear_pending((info), SET_##opt); \
1368 #define BTRFS_INODE_NODATASUM (1 << 0)
1369 #define BTRFS_INODE_NODATACOW (1 << 1)
1370 #define BTRFS_INODE_READONLY (1 << 2)
1371 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1372 #define BTRFS_INODE_PREALLOC (1 << 4)
1373 #define BTRFS_INODE_SYNC (1 << 5)
1374 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1375 #define BTRFS_INODE_APPEND (1 << 7)
1376 #define BTRFS_INODE_NODUMP (1 << 8)
1377 #define BTRFS_INODE_NOATIME (1 << 9)
1378 #define BTRFS_INODE_DIRSYNC (1 << 10)
1379 #define BTRFS_INODE_COMPRESS (1 << 11)
1381 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1383 #define BTRFS_INODE_FLAG_MASK \
1384 (BTRFS_INODE_NODATASUM | \
1385 BTRFS_INODE_NODATACOW | \
1386 BTRFS_INODE_READONLY | \
1387 BTRFS_INODE_NOCOMPRESS | \
1388 BTRFS_INODE_PREALLOC | \
1389 BTRFS_INODE_SYNC | \
1390 BTRFS_INODE_IMMUTABLE | \
1391 BTRFS_INODE_APPEND | \
1392 BTRFS_INODE_NODUMP | \
1393 BTRFS_INODE_NOATIME | \
1394 BTRFS_INODE_DIRSYNC | \
1395 BTRFS_INODE_COMPRESS | \
1396 BTRFS_INODE_ROOT_ITEM_INIT)
1398 struct btrfs_map_token
{
1399 struct extent_buffer
*eb
;
1401 unsigned long offset
;
1404 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1405 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1407 static inline void btrfs_init_map_token(struct btrfs_map_token
*token
,
1408 struct extent_buffer
*eb
)
1411 token
->kaddr
= page_address(eb
->pages
[0]);
1415 /* some macros to generate set/get functions for the struct fields. This
1416 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1419 #define le8_to_cpu(v) (v)
1420 #define cpu_to_le8(v) (v)
1423 static inline u8
get_unaligned_le8(const void *p
)
1428 static inline void put_unaligned_le8(u8 val
, void *p
)
1433 #define read_eb_member(eb, ptr, type, member, result) (\
1434 read_extent_buffer(eb, (char *)(result), \
1435 ((unsigned long)(ptr)) + \
1436 offsetof(type, member), \
1437 sizeof(((type *)0)->member)))
1439 #define write_eb_member(eb, ptr, type, member, result) (\
1440 write_extent_buffer(eb, (char *)(result), \
1441 ((unsigned long)(ptr)) + \
1442 offsetof(type, member), \
1443 sizeof(((type *)0)->member)))
1445 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1446 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1447 const void *ptr, unsigned long off); \
1448 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1449 const void *ptr, unsigned long off, \
1451 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1452 const void *ptr, unsigned long off); \
1453 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1454 unsigned long off, u##bits val);
1456 DECLARE_BTRFS_SETGET_BITS(8)
1457 DECLARE_BTRFS_SETGET_BITS(16)
1458 DECLARE_BTRFS_SETGET_BITS(32)
1459 DECLARE_BTRFS_SETGET_BITS(64)
1461 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1462 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1465 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1466 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1468 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1471 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1472 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1474 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1477 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1478 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1480 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1481 type *s, u##bits val) \
1483 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1484 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1487 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1488 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1490 const type *p = page_address(eb->pages[0]); \
1491 return get_unaligned_le##bits(&p->member); \
1493 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1496 type *p = page_address(eb->pages[0]); \
1497 put_unaligned_le##bits(val, &p->member); \
1500 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1501 static inline u##bits btrfs_##name(const type *s) \
1503 return get_unaligned_le##bits(&s->member); \
1505 static inline void btrfs_set_##name(type *s, u##bits val) \
1507 put_unaligned_le##bits(val, &s->member); \
1510 static inline u64
btrfs_device_total_bytes(const struct extent_buffer
*eb
,
1511 struct btrfs_dev_item
*s
)
1513 BUILD_BUG_ON(sizeof(u64
) !=
1514 sizeof(((struct btrfs_dev_item
*)0))->total_bytes
);
1515 return btrfs_get_64(eb
, s
, offsetof(struct btrfs_dev_item
,
1518 static inline void btrfs_set_device_total_bytes(const struct extent_buffer
*eb
,
1519 struct btrfs_dev_item
*s
,
1522 BUILD_BUG_ON(sizeof(u64
) !=
1523 sizeof(((struct btrfs_dev_item
*)0))->total_bytes
);
1524 WARN_ON(!IS_ALIGNED(val
, eb
->fs_info
->sectorsize
));
1525 btrfs_set_64(eb
, s
, offsetof(struct btrfs_dev_item
, total_bytes
), val
);
1529 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1530 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1531 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1532 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1533 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1535 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1536 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1537 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1538 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1539 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1540 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1542 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1543 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1545 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1547 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1549 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1551 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1553 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1554 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1556 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1558 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1560 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1563 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item
*d
)
1565 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1568 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item
*d
)
1570 return (unsigned long)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1573 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1574 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1575 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1576 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1577 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1578 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1579 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1580 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1581 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1582 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1583 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1585 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1587 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1590 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1591 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1592 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1594 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1596 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1598 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1600 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1601 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1603 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1605 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1606 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1608 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1611 unsigned long offset
= (unsigned long)c
;
1612 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1613 offset
+= nr
* sizeof(struct btrfs_stripe
);
1614 return (struct btrfs_stripe
*)offset
;
1617 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1619 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1622 static inline u64
btrfs_stripe_offset_nr(const struct extent_buffer
*eb
,
1623 struct btrfs_chunk
*c
, int nr
)
1625 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1628 static inline u64
btrfs_stripe_devid_nr(const struct extent_buffer
*eb
,
1629 struct btrfs_chunk
*c
, int nr
)
1631 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1634 /* struct btrfs_block_group_item */
1635 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used
, struct btrfs_block_group_item
,
1637 BTRFS_SETGET_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1639 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid
,
1640 struct btrfs_block_group_item
, chunk_objectid
, 64);
1642 BTRFS_SETGET_FUNCS(block_group_chunk_objectid
,
1643 struct btrfs_block_group_item
, chunk_objectid
, 64);
1644 BTRFS_SETGET_FUNCS(block_group_flags
,
1645 struct btrfs_block_group_item
, flags
, 64);
1646 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags
,
1647 struct btrfs_block_group_item
, flags
, 64);
1649 /* struct btrfs_free_space_info */
1650 BTRFS_SETGET_FUNCS(free_space_extent_count
, struct btrfs_free_space_info
,
1652 BTRFS_SETGET_FUNCS(free_space_flags
, struct btrfs_free_space_info
, flags
, 32);
1654 /* struct btrfs_inode_ref */
1655 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1656 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1658 /* struct btrfs_inode_extref */
1659 BTRFS_SETGET_FUNCS(inode_extref_parent
, struct btrfs_inode_extref
,
1660 parent_objectid
, 64);
1661 BTRFS_SETGET_FUNCS(inode_extref_name_len
, struct btrfs_inode_extref
,
1663 BTRFS_SETGET_FUNCS(inode_extref_index
, struct btrfs_inode_extref
, index
, 64);
1665 /* struct btrfs_inode_item */
1666 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1667 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1668 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1669 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1670 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1671 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1672 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1673 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1674 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1675 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1676 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1677 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1678 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation
, struct btrfs_inode_item
,
1680 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence
, struct btrfs_inode_item
,
1682 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid
, struct btrfs_inode_item
,
1684 BTRFS_SETGET_STACK_FUNCS(stack_inode_size
, struct btrfs_inode_item
, size
, 64);
1685 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes
, struct btrfs_inode_item
,
1687 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group
, struct btrfs_inode_item
,
1689 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1690 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid
, struct btrfs_inode_item
, uid
, 32);
1691 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid
, struct btrfs_inode_item
, gid
, 32);
1692 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode
, struct btrfs_inode_item
, mode
, 32);
1693 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1694 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags
, struct btrfs_inode_item
, flags
, 64);
1695 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1696 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1697 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec
, struct btrfs_timespec
, sec
, 64);
1698 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1700 /* struct btrfs_dev_extent */
1701 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1703 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1704 chunk_objectid
, 64);
1705 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1707 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1708 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 64);
1709 BTRFS_SETGET_FUNCS(extent_generation
, struct btrfs_extent_item
,
1711 BTRFS_SETGET_FUNCS(extent_flags
, struct btrfs_extent_item
, flags
, 64);
1713 BTRFS_SETGET_FUNCS(tree_block_level
, struct btrfs_tree_block_info
, level
, 8);
1715 static inline void btrfs_tree_block_key(const struct extent_buffer
*eb
,
1716 struct btrfs_tree_block_info
*item
,
1717 struct btrfs_disk_key
*key
)
1719 read_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1722 static inline void btrfs_set_tree_block_key(const struct extent_buffer
*eb
,
1723 struct btrfs_tree_block_info
*item
,
1724 struct btrfs_disk_key
*key
)
1726 write_eb_member(eb
, item
, struct btrfs_tree_block_info
, key
, key
);
1729 BTRFS_SETGET_FUNCS(extent_data_ref_root
, struct btrfs_extent_data_ref
,
1731 BTRFS_SETGET_FUNCS(extent_data_ref_objectid
, struct btrfs_extent_data_ref
,
1733 BTRFS_SETGET_FUNCS(extent_data_ref_offset
, struct btrfs_extent_data_ref
,
1735 BTRFS_SETGET_FUNCS(extent_data_ref_count
, struct btrfs_extent_data_ref
,
1738 BTRFS_SETGET_FUNCS(shared_data_ref_count
, struct btrfs_shared_data_ref
,
1741 BTRFS_SETGET_FUNCS(extent_inline_ref_type
, struct btrfs_extent_inline_ref
,
1743 BTRFS_SETGET_FUNCS(extent_inline_ref_offset
, struct btrfs_extent_inline_ref
,
1746 static inline u32
btrfs_extent_inline_ref_size(int type
)
1748 if (type
== BTRFS_TREE_BLOCK_REF_KEY
||
1749 type
== BTRFS_SHARED_BLOCK_REF_KEY
)
1750 return sizeof(struct btrfs_extent_inline_ref
);
1751 if (type
== BTRFS_SHARED_DATA_REF_KEY
)
1752 return sizeof(struct btrfs_shared_data_ref
) +
1753 sizeof(struct btrfs_extent_inline_ref
);
1754 if (type
== BTRFS_EXTENT_DATA_REF_KEY
)
1755 return sizeof(struct btrfs_extent_data_ref
) +
1756 offsetof(struct btrfs_extent_inline_ref
, offset
);
1760 /* struct btrfs_node */
1761 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1762 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1763 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr
, struct btrfs_key_ptr
,
1765 BTRFS_SETGET_STACK_FUNCS(stack_key_generation
, struct btrfs_key_ptr
,
1768 static inline u64
btrfs_node_blockptr(const struct extent_buffer
*eb
, int nr
)
1771 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1772 sizeof(struct btrfs_key_ptr
) * nr
;
1773 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1776 static inline void btrfs_set_node_blockptr(const struct extent_buffer
*eb
,
1780 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1781 sizeof(struct btrfs_key_ptr
) * nr
;
1782 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1785 static inline u64
btrfs_node_ptr_generation(const struct extent_buffer
*eb
, int nr
)
1788 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1789 sizeof(struct btrfs_key_ptr
) * nr
;
1790 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1793 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer
*eb
,
1797 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1798 sizeof(struct btrfs_key_ptr
) * nr
;
1799 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1802 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1804 return offsetof(struct btrfs_node
, ptrs
) +
1805 sizeof(struct btrfs_key_ptr
) * nr
;
1808 void btrfs_node_key(const struct extent_buffer
*eb
,
1809 struct btrfs_disk_key
*disk_key
, int nr
);
1811 static inline void btrfs_set_node_key(const struct extent_buffer
*eb
,
1812 struct btrfs_disk_key
*disk_key
, int nr
)
1815 ptr
= btrfs_node_key_ptr_offset(nr
);
1816 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1817 struct btrfs_key_ptr
, key
, disk_key
);
1820 /* struct btrfs_item */
1821 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1822 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1823 BTRFS_SETGET_STACK_FUNCS(stack_item_offset
, struct btrfs_item
, offset
, 32);
1824 BTRFS_SETGET_STACK_FUNCS(stack_item_size
, struct btrfs_item
, size
, 32);
1826 static inline unsigned long btrfs_item_nr_offset(int nr
)
1828 return offsetof(struct btrfs_leaf
, items
) +
1829 sizeof(struct btrfs_item
) * nr
;
1832 static inline struct btrfs_item
*btrfs_item_nr(int nr
)
1834 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1837 static inline u32
btrfs_item_end(const struct extent_buffer
*eb
,
1838 struct btrfs_item
*item
)
1840 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1843 static inline u32
btrfs_item_end_nr(const struct extent_buffer
*eb
, int nr
)
1845 return btrfs_item_end(eb
, btrfs_item_nr(nr
));
1848 static inline u32
btrfs_item_offset_nr(const struct extent_buffer
*eb
, int nr
)
1850 return btrfs_item_offset(eb
, btrfs_item_nr(nr
));
1853 static inline u32
btrfs_item_size_nr(const struct extent_buffer
*eb
, int nr
)
1855 return btrfs_item_size(eb
, btrfs_item_nr(nr
));
1858 static inline void btrfs_item_key(const struct extent_buffer
*eb
,
1859 struct btrfs_disk_key
*disk_key
, int nr
)
1861 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1862 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1865 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1866 struct btrfs_disk_key
*disk_key
, int nr
)
1868 struct btrfs_item
*item
= btrfs_item_nr(nr
);
1869 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1872 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1875 * struct btrfs_root_ref
1877 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1878 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1879 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1881 /* struct btrfs_dir_item */
1882 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1883 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1884 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1885 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1886 BTRFS_SETGET_STACK_FUNCS(stack_dir_type
, struct btrfs_dir_item
, type
, 8);
1887 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len
, struct btrfs_dir_item
,
1889 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len
, struct btrfs_dir_item
,
1891 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid
, struct btrfs_dir_item
,
1894 static inline void btrfs_dir_item_key(const struct extent_buffer
*eb
,
1895 const struct btrfs_dir_item
*item
,
1896 struct btrfs_disk_key
*key
)
1898 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1901 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1902 struct btrfs_dir_item
*item
,
1903 const struct btrfs_disk_key
*key
)
1905 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1908 BTRFS_SETGET_FUNCS(free_space_entries
, struct btrfs_free_space_header
,
1910 BTRFS_SETGET_FUNCS(free_space_bitmaps
, struct btrfs_free_space_header
,
1912 BTRFS_SETGET_FUNCS(free_space_generation
, struct btrfs_free_space_header
,
1915 static inline void btrfs_free_space_key(const struct extent_buffer
*eb
,
1916 const struct btrfs_free_space_header
*h
,
1917 struct btrfs_disk_key
*key
)
1919 read_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1922 static inline void btrfs_set_free_space_key(struct extent_buffer
*eb
,
1923 struct btrfs_free_space_header
*h
,
1924 const struct btrfs_disk_key
*key
)
1926 write_eb_member(eb
, h
, struct btrfs_free_space_header
, location
, key
);
1929 /* struct btrfs_disk_key */
1930 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1932 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1933 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1935 #ifdef __LITTLE_ENDIAN
1938 * Optimized helpers for little-endian architectures where CPU and on-disk
1939 * structures have the same endianness and we can skip conversions.
1942 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu_key
,
1943 const struct btrfs_disk_key
*disk_key
)
1945 memcpy(cpu_key
, disk_key
, sizeof(struct btrfs_key
));
1948 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk_key
,
1949 const struct btrfs_key
*cpu_key
)
1951 memcpy(disk_key
, cpu_key
, sizeof(struct btrfs_key
));
1954 static inline void btrfs_node_key_to_cpu(const struct extent_buffer
*eb
,
1955 struct btrfs_key
*cpu_key
, int nr
)
1957 struct btrfs_disk_key
*disk_key
= (struct btrfs_disk_key
*)cpu_key
;
1959 btrfs_node_key(eb
, disk_key
, nr
);
1962 static inline void btrfs_item_key_to_cpu(const struct extent_buffer
*eb
,
1963 struct btrfs_key
*cpu_key
, int nr
)
1965 struct btrfs_disk_key
*disk_key
= (struct btrfs_disk_key
*)cpu_key
;
1967 btrfs_item_key(eb
, disk_key
, nr
);
1970 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer
*eb
,
1971 const struct btrfs_dir_item
*item
,
1972 struct btrfs_key
*cpu_key
)
1974 struct btrfs_disk_key
*disk_key
= (struct btrfs_disk_key
*)cpu_key
;
1976 btrfs_dir_item_key(eb
, item
, disk_key
);
1981 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1982 const struct btrfs_disk_key
*disk
)
1984 cpu
->offset
= le64_to_cpu(disk
->offset
);
1985 cpu
->type
= disk
->type
;
1986 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1989 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1990 const struct btrfs_key
*cpu
)
1992 disk
->offset
= cpu_to_le64(cpu
->offset
);
1993 disk
->type
= cpu
->type
;
1994 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1997 static inline void btrfs_node_key_to_cpu(const struct extent_buffer
*eb
,
1998 struct btrfs_key
*key
, int nr
)
2000 struct btrfs_disk_key disk_key
;
2001 btrfs_node_key(eb
, &disk_key
, nr
);
2002 btrfs_disk_key_to_cpu(key
, &disk_key
);
2005 static inline void btrfs_item_key_to_cpu(const struct extent_buffer
*eb
,
2006 struct btrfs_key
*key
, int nr
)
2008 struct btrfs_disk_key disk_key
;
2009 btrfs_item_key(eb
, &disk_key
, nr
);
2010 btrfs_disk_key_to_cpu(key
, &disk_key
);
2013 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer
*eb
,
2014 const struct btrfs_dir_item
*item
,
2015 struct btrfs_key
*key
)
2017 struct btrfs_disk_key disk_key
;
2018 btrfs_dir_item_key(eb
, item
, &disk_key
);
2019 btrfs_disk_key_to_cpu(key
, &disk_key
);
2024 /* struct btrfs_header */
2025 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
2026 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
2028 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
2029 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
2030 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
2031 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
2032 BTRFS_SETGET_STACK_FUNCS(stack_header_generation
, struct btrfs_header
,
2034 BTRFS_SETGET_STACK_FUNCS(stack_header_owner
, struct btrfs_header
, owner
, 64);
2035 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems
, struct btrfs_header
,
2037 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr
, struct btrfs_header
, bytenr
, 64);
2039 static inline int btrfs_header_flag(const struct extent_buffer
*eb
, u64 flag
)
2041 return (btrfs_header_flags(eb
) & flag
) == flag
;
2044 static inline void btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
2046 u64 flags
= btrfs_header_flags(eb
);
2047 btrfs_set_header_flags(eb
, flags
| flag
);
2050 static inline void btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
2052 u64 flags
= btrfs_header_flags(eb
);
2053 btrfs_set_header_flags(eb
, flags
& ~flag
);
2056 static inline int btrfs_header_backref_rev(const struct extent_buffer
*eb
)
2058 u64 flags
= btrfs_header_flags(eb
);
2059 return flags
>> BTRFS_BACKREF_REV_SHIFT
;
2062 static inline void btrfs_set_header_backref_rev(struct extent_buffer
*eb
,
2065 u64 flags
= btrfs_header_flags(eb
);
2066 flags
&= ~BTRFS_BACKREF_REV_MASK
;
2067 flags
|= (u64
)rev
<< BTRFS_BACKREF_REV_SHIFT
;
2068 btrfs_set_header_flags(eb
, flags
);
2071 static inline int btrfs_is_leaf(const struct extent_buffer
*eb
)
2073 return btrfs_header_level(eb
) == 0;
2076 /* struct btrfs_root_item */
2077 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
2079 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
2080 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2081 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
2083 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
2085 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
2086 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
2087 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
2088 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
2089 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
2090 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
2091 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
2092 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
2094 BTRFS_SETGET_STACK_FUNCS(root_generation_v2
, struct btrfs_root_item
,
2096 BTRFS_SETGET_STACK_FUNCS(root_ctransid
, struct btrfs_root_item
,
2098 BTRFS_SETGET_STACK_FUNCS(root_otransid
, struct btrfs_root_item
,
2100 BTRFS_SETGET_STACK_FUNCS(root_stransid
, struct btrfs_root_item
,
2102 BTRFS_SETGET_STACK_FUNCS(root_rtransid
, struct btrfs_root_item
,
2105 static inline bool btrfs_root_readonly(const struct btrfs_root
*root
)
2107 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY
)) != 0;
2110 static inline bool btrfs_root_dead(const struct btrfs_root
*root
)
2112 return (root
->root_item
.flags
& cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD
)) != 0;
2115 /* struct btrfs_root_backup */
2116 BTRFS_SETGET_STACK_FUNCS(backup_tree_root
, struct btrfs_root_backup
,
2118 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen
, struct btrfs_root_backup
,
2120 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level
, struct btrfs_root_backup
,
2121 tree_root_level
, 8);
2123 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root
, struct btrfs_root_backup
,
2125 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen
, struct btrfs_root_backup
,
2126 chunk_root_gen
, 64);
2127 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level
, struct btrfs_root_backup
,
2128 chunk_root_level
, 8);
2130 BTRFS_SETGET_STACK_FUNCS(backup_extent_root
, struct btrfs_root_backup
,
2132 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen
, struct btrfs_root_backup
,
2133 extent_root_gen
, 64);
2134 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level
, struct btrfs_root_backup
,
2135 extent_root_level
, 8);
2137 BTRFS_SETGET_STACK_FUNCS(backup_fs_root
, struct btrfs_root_backup
,
2139 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen
, struct btrfs_root_backup
,
2141 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level
, struct btrfs_root_backup
,
2144 BTRFS_SETGET_STACK_FUNCS(backup_dev_root
, struct btrfs_root_backup
,
2146 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen
, struct btrfs_root_backup
,
2148 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level
, struct btrfs_root_backup
,
2151 BTRFS_SETGET_STACK_FUNCS(backup_csum_root
, struct btrfs_root_backup
,
2153 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen
, struct btrfs_root_backup
,
2155 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level
, struct btrfs_root_backup
,
2156 csum_root_level
, 8);
2157 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes
, struct btrfs_root_backup
,
2159 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used
, struct btrfs_root_backup
,
2161 BTRFS_SETGET_STACK_FUNCS(backup_num_devices
, struct btrfs_root_backup
,
2164 /* struct btrfs_balance_item */
2165 BTRFS_SETGET_FUNCS(balance_flags
, struct btrfs_balance_item
, flags
, 64);
2167 static inline void btrfs_balance_data(const struct extent_buffer
*eb
,
2168 const struct btrfs_balance_item
*bi
,
2169 struct btrfs_disk_balance_args
*ba
)
2171 read_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2174 static inline void btrfs_set_balance_data(struct extent_buffer
*eb
,
2175 struct btrfs_balance_item
*bi
,
2176 const struct btrfs_disk_balance_args
*ba
)
2178 write_eb_member(eb
, bi
, struct btrfs_balance_item
, data
, ba
);
2181 static inline void btrfs_balance_meta(const struct extent_buffer
*eb
,
2182 const struct btrfs_balance_item
*bi
,
2183 struct btrfs_disk_balance_args
*ba
)
2185 read_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2188 static inline void btrfs_set_balance_meta(struct extent_buffer
*eb
,
2189 struct btrfs_balance_item
*bi
,
2190 const struct btrfs_disk_balance_args
*ba
)
2192 write_eb_member(eb
, bi
, struct btrfs_balance_item
, meta
, ba
);
2195 static inline void btrfs_balance_sys(const struct extent_buffer
*eb
,
2196 const struct btrfs_balance_item
*bi
,
2197 struct btrfs_disk_balance_args
*ba
)
2199 read_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2202 static inline void btrfs_set_balance_sys(struct extent_buffer
*eb
,
2203 struct btrfs_balance_item
*bi
,
2204 const struct btrfs_disk_balance_args
*ba
)
2206 write_eb_member(eb
, bi
, struct btrfs_balance_item
, sys
, ba
);
2210 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args
*cpu
,
2211 const struct btrfs_disk_balance_args
*disk
)
2213 memset(cpu
, 0, sizeof(*cpu
));
2215 cpu
->profiles
= le64_to_cpu(disk
->profiles
);
2216 cpu
->usage
= le64_to_cpu(disk
->usage
);
2217 cpu
->devid
= le64_to_cpu(disk
->devid
);
2218 cpu
->pstart
= le64_to_cpu(disk
->pstart
);
2219 cpu
->pend
= le64_to_cpu(disk
->pend
);
2220 cpu
->vstart
= le64_to_cpu(disk
->vstart
);
2221 cpu
->vend
= le64_to_cpu(disk
->vend
);
2222 cpu
->target
= le64_to_cpu(disk
->target
);
2223 cpu
->flags
= le64_to_cpu(disk
->flags
);
2224 cpu
->limit
= le64_to_cpu(disk
->limit
);
2225 cpu
->stripes_min
= le32_to_cpu(disk
->stripes_min
);
2226 cpu
->stripes_max
= le32_to_cpu(disk
->stripes_max
);
2230 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args
*disk
,
2231 const struct btrfs_balance_args
*cpu
)
2233 memset(disk
, 0, sizeof(*disk
));
2235 disk
->profiles
= cpu_to_le64(cpu
->profiles
);
2236 disk
->usage
= cpu_to_le64(cpu
->usage
);
2237 disk
->devid
= cpu_to_le64(cpu
->devid
);
2238 disk
->pstart
= cpu_to_le64(cpu
->pstart
);
2239 disk
->pend
= cpu_to_le64(cpu
->pend
);
2240 disk
->vstart
= cpu_to_le64(cpu
->vstart
);
2241 disk
->vend
= cpu_to_le64(cpu
->vend
);
2242 disk
->target
= cpu_to_le64(cpu
->target
);
2243 disk
->flags
= cpu_to_le64(cpu
->flags
);
2244 disk
->limit
= cpu_to_le64(cpu
->limit
);
2245 disk
->stripes_min
= cpu_to_le32(cpu
->stripes_min
);
2246 disk
->stripes_max
= cpu_to_le32(cpu
->stripes_max
);
2249 /* struct btrfs_super_block */
2250 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
2251 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
2252 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
2254 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
2255 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
2256 struct btrfs_super_block
, sys_chunk_array_size
, 32);
2257 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
2258 struct btrfs_super_block
, chunk_root_generation
, 64);
2259 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
2261 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
2263 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
2264 chunk_root_level
, 8);
2265 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
2267 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
2268 log_root_transid
, 64);
2269 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
2271 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
2273 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
2275 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
2277 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
2279 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
2281 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
2282 root_dir_objectid
, 64);
2283 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
2285 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
2287 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
2288 compat_ro_flags
, 64);
2289 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
2290 incompat_flags
, 64);
2291 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
2293 BTRFS_SETGET_STACK_FUNCS(super_cache_generation
, struct btrfs_super_block
,
2294 cache_generation
, 64);
2295 BTRFS_SETGET_STACK_FUNCS(super_magic
, struct btrfs_super_block
, magic
, 64);
2296 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation
, struct btrfs_super_block
,
2297 uuid_tree_generation
, 64);
2299 int btrfs_super_csum_size(const struct btrfs_super_block
*s
);
2300 const char *btrfs_super_csum_name(u16 csum_type
);
2301 const char *btrfs_super_csum_driver(u16 csum_type
);
2302 size_t __attribute_const__
btrfs_get_num_csums(void);
2306 * The leaf data grows from end-to-front in the node.
2307 * this returns the address of the start of the last item,
2308 * which is the stop of the leaf data stack
2310 static inline unsigned int leaf_data_end(const struct extent_buffer
*leaf
)
2312 u32 nr
= btrfs_header_nritems(leaf
);
2315 return BTRFS_LEAF_DATA_SIZE(leaf
->fs_info
);
2316 return btrfs_item_offset_nr(leaf
, nr
- 1);
2319 /* struct btrfs_file_extent_item */
2320 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type
, struct btrfs_file_extent_item
,
2322 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr
,
2323 struct btrfs_file_extent_item
, disk_bytenr
, 64);
2324 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset
,
2325 struct btrfs_file_extent_item
, offset
, 64);
2326 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation
,
2327 struct btrfs_file_extent_item
, generation
, 64);
2328 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes
,
2329 struct btrfs_file_extent_item
, num_bytes
, 64);
2330 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes
,
2331 struct btrfs_file_extent_item
, ram_bytes
, 64);
2332 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes
,
2333 struct btrfs_file_extent_item
, disk_num_bytes
, 64);
2334 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression
,
2335 struct btrfs_file_extent_item
, compression
, 8);
2337 static inline unsigned long
2338 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item
*e
)
2340 return (unsigned long)e
+ BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2343 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
2345 return BTRFS_FILE_EXTENT_INLINE_DATA_START
+ datasize
;
2348 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
2349 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
2351 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
2353 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
2354 disk_num_bytes
, 64);
2355 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
2357 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
2359 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
2361 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
2363 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
2365 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
2366 other_encoding
, 16);
2369 * this returns the number of bytes used by the item on disk, minus the
2370 * size of any extent headers. If a file is compressed on disk, this is
2371 * the compressed size
2373 static inline u32
btrfs_file_extent_inline_item_len(
2374 const struct extent_buffer
*eb
,
2375 struct btrfs_item
*e
)
2377 return btrfs_item_size(eb
, e
) - BTRFS_FILE_EXTENT_INLINE_DATA_START
;
2380 /* btrfs_qgroup_status_item */
2381 BTRFS_SETGET_FUNCS(qgroup_status_generation
, struct btrfs_qgroup_status_item
,
2383 BTRFS_SETGET_FUNCS(qgroup_status_version
, struct btrfs_qgroup_status_item
,
2385 BTRFS_SETGET_FUNCS(qgroup_status_flags
, struct btrfs_qgroup_status_item
,
2387 BTRFS_SETGET_FUNCS(qgroup_status_rescan
, struct btrfs_qgroup_status_item
,
2390 /* btrfs_qgroup_info_item */
2391 BTRFS_SETGET_FUNCS(qgroup_info_generation
, struct btrfs_qgroup_info_item
,
2393 BTRFS_SETGET_FUNCS(qgroup_info_rfer
, struct btrfs_qgroup_info_item
, rfer
, 64);
2394 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr
, struct btrfs_qgroup_info_item
,
2396 BTRFS_SETGET_FUNCS(qgroup_info_excl
, struct btrfs_qgroup_info_item
, excl
, 64);
2397 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr
, struct btrfs_qgroup_info_item
,
2400 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation
,
2401 struct btrfs_qgroup_info_item
, generation
, 64);
2402 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer
, struct btrfs_qgroup_info_item
,
2404 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr
,
2405 struct btrfs_qgroup_info_item
, rfer_cmpr
, 64);
2406 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl
, struct btrfs_qgroup_info_item
,
2408 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr
,
2409 struct btrfs_qgroup_info_item
, excl_cmpr
, 64);
2411 /* btrfs_qgroup_limit_item */
2412 BTRFS_SETGET_FUNCS(qgroup_limit_flags
, struct btrfs_qgroup_limit_item
,
2414 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer
, struct btrfs_qgroup_limit_item
,
2416 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl
, struct btrfs_qgroup_limit_item
,
2418 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer
, struct btrfs_qgroup_limit_item
,
2420 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl
, struct btrfs_qgroup_limit_item
,
2423 /* btrfs_dev_replace_item */
2424 BTRFS_SETGET_FUNCS(dev_replace_src_devid
,
2425 struct btrfs_dev_replace_item
, src_devid
, 64);
2426 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode
,
2427 struct btrfs_dev_replace_item
, cont_reading_from_srcdev_mode
,
2429 BTRFS_SETGET_FUNCS(dev_replace_replace_state
, struct btrfs_dev_replace_item
,
2431 BTRFS_SETGET_FUNCS(dev_replace_time_started
, struct btrfs_dev_replace_item
,
2433 BTRFS_SETGET_FUNCS(dev_replace_time_stopped
, struct btrfs_dev_replace_item
,
2435 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors
, struct btrfs_dev_replace_item
,
2436 num_write_errors
, 64);
2437 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors
,
2438 struct btrfs_dev_replace_item
, num_uncorrectable_read_errors
,
2440 BTRFS_SETGET_FUNCS(dev_replace_cursor_left
, struct btrfs_dev_replace_item
,
2442 BTRFS_SETGET_FUNCS(dev_replace_cursor_right
, struct btrfs_dev_replace_item
,
2445 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid
,
2446 struct btrfs_dev_replace_item
, src_devid
, 64);
2447 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode
,
2448 struct btrfs_dev_replace_item
,
2449 cont_reading_from_srcdev_mode
, 64);
2450 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state
,
2451 struct btrfs_dev_replace_item
, replace_state
, 64);
2452 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started
,
2453 struct btrfs_dev_replace_item
, time_started
, 64);
2454 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped
,
2455 struct btrfs_dev_replace_item
, time_stopped
, 64);
2456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors
,
2457 struct btrfs_dev_replace_item
, num_write_errors
, 64);
2458 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors
,
2459 struct btrfs_dev_replace_item
,
2460 num_uncorrectable_read_errors
, 64);
2461 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left
,
2462 struct btrfs_dev_replace_item
, cursor_left
, 64);
2463 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right
,
2464 struct btrfs_dev_replace_item
, cursor_right
, 64);
2466 /* helper function to cast into the data area of the leaf. */
2467 #define btrfs_item_ptr(leaf, slot, type) \
2468 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2469 btrfs_item_offset_nr(leaf, slot)))
2471 #define btrfs_item_ptr_offset(leaf, slot) \
2472 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2473 btrfs_item_offset_nr(leaf, slot)))
2475 static inline u32
btrfs_crc32c(u32 crc
, const void *address
, unsigned length
)
2477 return crc32c(crc
, address
, length
);
2480 static inline void btrfs_crc32c_final(u32 crc
, u8
*result
)
2482 put_unaligned_le32(~crc
, result
);
2485 static inline u64
btrfs_name_hash(const char *name
, int len
)
2487 return crc32c((u32
)~1, name
, len
);
2491 * Figure the key offset of an extended inode ref
2493 static inline u64
btrfs_extref_hash(u64 parent_objectid
, const char *name
,
2496 return (u64
) crc32c(parent_objectid
, name
, len
);
2499 static inline gfp_t
btrfs_alloc_write_mask(struct address_space
*mapping
)
2501 return mapping_gfp_constraint(mapping
, ~__GFP_FS
);
2506 enum btrfs_inline_ref_type
{
2507 BTRFS_REF_TYPE_INVALID
,
2508 BTRFS_REF_TYPE_BLOCK
,
2509 BTRFS_REF_TYPE_DATA
,
2513 int btrfs_get_extent_inline_ref_type(const struct extent_buffer
*eb
,
2514 struct btrfs_extent_inline_ref
*iref
,
2515 enum btrfs_inline_ref_type is_data
);
2516 u64
hash_extent_data_ref(u64 root_objectid
, u64 owner
, u64 offset
);
2518 u64
btrfs_csum_bytes_to_leaves(struct btrfs_fs_info
*fs_info
, u64 csum_bytes
);
2521 * Use this if we would be adding new items, as we could split nodes as we cow
2524 static inline u64
btrfs_calc_insert_metadata_size(struct btrfs_fs_info
*fs_info
,
2527 return (u64
)fs_info
->nodesize
* BTRFS_MAX_LEVEL
* 2 * num_items
;
2531 * Doing a truncate or a modification won't result in new nodes or leaves, just
2532 * what we need for COW.
2534 static inline u64
btrfs_calc_metadata_size(struct btrfs_fs_info
*fs_info
,
2537 return (u64
)fs_info
->nodesize
* BTRFS_MAX_LEVEL
* num_items
;
2540 int btrfs_add_excluded_extent(struct btrfs_fs_info
*fs_info
,
2541 u64 start
, u64 num_bytes
);
2542 void btrfs_free_excluded_extents(struct btrfs_block_group
*cache
);
2543 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
2544 unsigned long count
);
2545 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info
*fs_info
,
2546 struct btrfs_delayed_ref_root
*delayed_refs
,
2547 struct btrfs_delayed_ref_head
*head
);
2548 int btrfs_lookup_data_extent(struct btrfs_fs_info
*fs_info
, u64 start
, u64 len
);
2549 int btrfs_lookup_extent_info(struct btrfs_trans_handle
*trans
,
2550 struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2551 u64 offset
, int metadata
, u64
*refs
, u64
*flags
);
2552 int btrfs_pin_extent(struct btrfs_trans_handle
*trans
, u64 bytenr
, u64 num
,
2554 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle
*trans
,
2555 u64 bytenr
, u64 num_bytes
);
2556 int btrfs_exclude_logged_extents(struct extent_buffer
*eb
);
2557 int btrfs_cross_ref_exist(struct btrfs_root
*root
,
2558 u64 objectid
, u64 offset
, u64 bytenr
, bool strict
);
2559 struct extent_buffer
*btrfs_alloc_tree_block(struct btrfs_trans_handle
*trans
,
2560 struct btrfs_root
*root
,
2561 u64 parent
, u64 root_objectid
,
2562 const struct btrfs_disk_key
*key
,
2563 int level
, u64 hint
,
2565 enum btrfs_lock_nesting nest
);
2566 void btrfs_free_tree_block(struct btrfs_trans_handle
*trans
,
2567 struct btrfs_root
*root
,
2568 struct extent_buffer
*buf
,
2569 u64 parent
, int last_ref
);
2570 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle
*trans
,
2571 struct btrfs_root
*root
, u64 owner
,
2572 u64 offset
, u64 ram_bytes
,
2573 struct btrfs_key
*ins
);
2574 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle
*trans
,
2575 u64 root_objectid
, u64 owner
, u64 offset
,
2576 struct btrfs_key
*ins
);
2577 int btrfs_reserve_extent(struct btrfs_root
*root
, u64 ram_bytes
, u64 num_bytes
,
2578 u64 min_alloc_size
, u64 empty_size
, u64 hint_byte
,
2579 struct btrfs_key
*ins
, int is_data
, int delalloc
);
2580 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2581 struct extent_buffer
*buf
, int full_backref
);
2582 int btrfs_dec_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2583 struct extent_buffer
*buf
, int full_backref
);
2584 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle
*trans
,
2585 struct extent_buffer
*eb
, u64 flags
,
2586 int level
, int is_data
);
2587 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_ref
*ref
);
2589 int btrfs_free_reserved_extent(struct btrfs_fs_info
*fs_info
,
2590 u64 start
, u64 len
, int delalloc
);
2591 int btrfs_pin_reserved_extent(struct btrfs_trans_handle
*trans
, u64 start
,
2593 void btrfs_prepare_extent_commit(struct btrfs_fs_info
*fs_info
);
2594 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
);
2595 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
2596 struct btrfs_ref
*generic_ref
);
2598 int btrfs_extent_readonly(struct btrfs_fs_info
*fs_info
, u64 bytenr
);
2599 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
2602 * Different levels for to flush space when doing space reservations.
2604 * The higher the level, the more methods we try to reclaim space.
2606 enum btrfs_reserve_flush_enum
{
2607 /* If we are in the transaction, we can't flush anything.*/
2608 BTRFS_RESERVE_NO_FLUSH
,
2612 * - Running delayed inode items
2613 * - Allocating a new chunk
2615 BTRFS_RESERVE_FLUSH_LIMIT
,
2619 * - Running delayed inode items
2620 * - Running delayed refs
2621 * - Running delalloc and waiting for ordered extents
2622 * - Allocating a new chunk
2624 BTRFS_RESERVE_FLUSH_EVICT
,
2627 * Flush space by above mentioned methods and by:
2628 * - Running delayed iputs
2629 * - Commiting transaction
2631 * Can be interruped by fatal signal.
2633 BTRFS_RESERVE_FLUSH_DATA
,
2634 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE
,
2635 BTRFS_RESERVE_FLUSH_ALL
,
2638 * Pretty much the same as FLUSH_ALL, but can also steal space from
2641 * Can be interruped by fatal signal.
2643 BTRFS_RESERVE_FLUSH_ALL_STEAL
,
2646 enum btrfs_flush_state
{
2647 FLUSH_DELAYED_ITEMS_NR
= 1,
2648 FLUSH_DELAYED_ITEMS
= 2,
2649 FLUSH_DELAYED_REFS_NR
= 3,
2650 FLUSH_DELAYED_REFS
= 4,
2652 FLUSH_DELALLOC_WAIT
= 6,
2654 ALLOC_CHUNK_FORCE
= 8,
2655 RUN_DELAYED_IPUTS
= 9,
2659 int btrfs_subvolume_reserve_metadata(struct btrfs_root
*root
,
2660 struct btrfs_block_rsv
*rsv
,
2661 int nitems
, bool use_global_rsv
);
2662 void btrfs_subvolume_release_metadata(struct btrfs_root
*root
,
2663 struct btrfs_block_rsv
*rsv
);
2664 void btrfs_delalloc_release_extents(struct btrfs_inode
*inode
, u64 num_bytes
);
2666 int btrfs_delalloc_reserve_metadata(struct btrfs_inode
*inode
, u64 num_bytes
);
2667 u64
btrfs_account_ro_block_groups_free_space(struct btrfs_space_info
*sinfo
);
2668 int btrfs_error_unpin_extent_range(struct btrfs_fs_info
*fs_info
,
2669 u64 start
, u64 end
);
2670 int btrfs_discard_extent(struct btrfs_fs_info
*fs_info
, u64 bytenr
,
2671 u64 num_bytes
, u64
*actual_bytes
);
2672 int btrfs_trim_fs(struct btrfs_fs_info
*fs_info
, struct fstrim_range
*range
);
2674 int btrfs_init_space_info(struct btrfs_fs_info
*fs_info
);
2675 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle
*trans
,
2676 struct btrfs_fs_info
*fs_info
);
2677 int btrfs_start_write_no_snapshotting(struct btrfs_root
*root
);
2678 void btrfs_end_write_no_snapshotting(struct btrfs_root
*root
);
2679 void btrfs_wait_for_snapshot_creation(struct btrfs_root
*root
);
2682 int btrfs_bin_search(struct extent_buffer
*eb
, const struct btrfs_key
*key
,
2684 int __pure
btrfs_comp_cpu_keys(const struct btrfs_key
*k1
, const struct btrfs_key
*k2
);
2685 int btrfs_previous_item(struct btrfs_root
*root
,
2686 struct btrfs_path
*path
, u64 min_objectid
,
2688 int btrfs_previous_extent_item(struct btrfs_root
*root
,
2689 struct btrfs_path
*path
, u64 min_objectid
);
2690 void btrfs_set_item_key_safe(struct btrfs_fs_info
*fs_info
,
2691 struct btrfs_path
*path
,
2692 const struct btrfs_key
*new_key
);
2693 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
2694 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
2695 struct btrfs_key
*key
, int lowest_level
,
2697 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
2698 struct btrfs_path
*path
,
2700 struct extent_buffer
*btrfs_read_node_slot(struct extent_buffer
*parent
,
2703 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
2704 struct btrfs_root
*root
, struct extent_buffer
*buf
,
2705 struct extent_buffer
*parent
, int parent_slot
,
2706 struct extent_buffer
**cow_ret
,
2707 enum btrfs_lock_nesting nest
);
2708 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
2709 struct btrfs_root
*root
,
2710 struct extent_buffer
*buf
,
2711 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
2712 int btrfs_block_can_be_shared(struct btrfs_root
*root
,
2713 struct extent_buffer
*buf
);
2714 void btrfs_extend_item(struct btrfs_path
*path
, u32 data_size
);
2715 void btrfs_truncate_item(struct btrfs_path
*path
, u32 new_size
, int from_end
);
2716 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
2717 struct btrfs_root
*root
,
2718 struct btrfs_path
*path
,
2719 const struct btrfs_key
*new_key
,
2720 unsigned long split_offset
);
2721 int btrfs_duplicate_item(struct btrfs_trans_handle
*trans
,
2722 struct btrfs_root
*root
,
2723 struct btrfs_path
*path
,
2724 const struct btrfs_key
*new_key
);
2725 int btrfs_find_item(struct btrfs_root
*fs_root
, struct btrfs_path
*path
,
2726 u64 inum
, u64 ioff
, u8 key_type
, struct btrfs_key
*found_key
);
2727 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2728 const struct btrfs_key
*key
, struct btrfs_path
*p
,
2729 int ins_len
, int cow
);
2730 int btrfs_search_old_slot(struct btrfs_root
*root
, const struct btrfs_key
*key
,
2731 struct btrfs_path
*p
, u64 time_seq
);
2732 int btrfs_search_slot_for_read(struct btrfs_root
*root
,
2733 const struct btrfs_key
*key
,
2734 struct btrfs_path
*p
, int find_higher
,
2736 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
2737 struct btrfs_root
*root
, struct extent_buffer
*parent
,
2738 int start_slot
, u64
*last_ret
,
2739 struct btrfs_key
*progress
);
2740 void btrfs_release_path(struct btrfs_path
*p
);
2741 struct btrfs_path
*btrfs_alloc_path(void);
2742 void btrfs_free_path(struct btrfs_path
*p
);
2744 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2745 struct btrfs_path
*path
, int slot
, int nr
);
2746 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
2747 struct btrfs_root
*root
,
2748 struct btrfs_path
*path
)
2750 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
2753 void setup_items_for_insert(struct btrfs_root
*root
, struct btrfs_path
*path
,
2754 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2756 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2757 const struct btrfs_key
*key
, void *data
, u32 data_size
);
2758 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
2759 struct btrfs_root
*root
,
2760 struct btrfs_path
*path
,
2761 const struct btrfs_key
*cpu_key
, u32
*data_size
,
2764 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
2765 struct btrfs_root
*root
,
2766 struct btrfs_path
*path
,
2767 const struct btrfs_key
*key
,
2770 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
2773 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2774 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
2775 int btrfs_next_old_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
,
2777 static inline int btrfs_next_old_item(struct btrfs_root
*root
,
2778 struct btrfs_path
*p
, u64 time_seq
)
2781 if (p
->slots
[0] >= btrfs_header_nritems(p
->nodes
[0]))
2782 return btrfs_next_old_leaf(root
, p
, time_seq
);
2785 static inline int btrfs_next_item(struct btrfs_root
*root
, struct btrfs_path
*p
)
2787 return btrfs_next_old_item(root
, p
, 0);
2789 int btrfs_leaf_free_space(struct extent_buffer
*leaf
);
2790 int __must_check
btrfs_drop_snapshot(struct btrfs_root
*root
, int update_ref
,
2792 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
2793 struct btrfs_root
*root
,
2794 struct extent_buffer
*node
,
2795 struct extent_buffer
*parent
);
2796 static inline int btrfs_fs_closing(struct btrfs_fs_info
*fs_info
)
2799 * Do it this way so we only ever do one test_bit in the normal case.
2801 if (test_bit(BTRFS_FS_CLOSING_START
, &fs_info
->flags
)) {
2802 if (test_bit(BTRFS_FS_CLOSING_DONE
, &fs_info
->flags
))
2810 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2811 * anything except sleeping. This function is used to check the status of
2814 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info
*fs_info
)
2816 return fs_info
->sb
->s_flags
& SB_RDONLY
|| btrfs_fs_closing(fs_info
);
2819 /* tree mod log functions from ctree.c */
2820 u64
btrfs_get_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2821 struct seq_list
*elem
);
2822 void btrfs_put_tree_mod_seq(struct btrfs_fs_info
*fs_info
,
2823 struct seq_list
*elem
);
2824 int btrfs_old_root_level(struct btrfs_root
*root
, u64 time_seq
);
2827 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
, u64 root_id
,
2828 u64 ref_id
, u64 dirid
, u64 sequence
, const char *name
,
2830 int btrfs_del_root_ref(struct btrfs_trans_handle
*trans
, u64 root_id
,
2831 u64 ref_id
, u64 dirid
, u64
*sequence
, const char *name
,
2833 int btrfs_del_root(struct btrfs_trans_handle
*trans
,
2834 const struct btrfs_key
*key
);
2835 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
2836 const struct btrfs_key
*key
,
2837 struct btrfs_root_item
*item
);
2838 int __must_check
btrfs_update_root(struct btrfs_trans_handle
*trans
,
2839 struct btrfs_root
*root
,
2840 struct btrfs_key
*key
,
2841 struct btrfs_root_item
*item
);
2842 int btrfs_find_root(struct btrfs_root
*root
, const struct btrfs_key
*search_key
,
2843 struct btrfs_path
*path
, struct btrfs_root_item
*root_item
,
2844 struct btrfs_key
*root_key
);
2845 int btrfs_find_orphan_roots(struct btrfs_fs_info
*fs_info
);
2846 void btrfs_set_root_node(struct btrfs_root_item
*item
,
2847 struct extent_buffer
*node
);
2848 void btrfs_check_and_init_root_item(struct btrfs_root_item
*item
);
2849 void btrfs_update_root_times(struct btrfs_trans_handle
*trans
,
2850 struct btrfs_root
*root
);
2853 int btrfs_uuid_tree_add(struct btrfs_trans_handle
*trans
, u8
*uuid
, u8 type
,
2855 int btrfs_uuid_tree_remove(struct btrfs_trans_handle
*trans
, u8
*uuid
, u8 type
,
2857 int btrfs_uuid_tree_iterate(struct btrfs_fs_info
*fs_info
);
2860 int btrfs_check_dir_item_collision(struct btrfs_root
*root
, u64 dir
,
2861 const char *name
, int name_len
);
2862 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, const char *name
,
2863 int name_len
, struct btrfs_inode
*dir
,
2864 struct btrfs_key
*location
, u8 type
, u64 index
);
2865 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2866 struct btrfs_root
*root
,
2867 struct btrfs_path
*path
, u64 dir
,
2868 const char *name
, int name_len
,
2870 struct btrfs_dir_item
*
2871 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2872 struct btrfs_root
*root
,
2873 struct btrfs_path
*path
, u64 dir
,
2874 u64 objectid
, const char *name
, int name_len
,
2876 struct btrfs_dir_item
*
2877 btrfs_search_dir_index_item(struct btrfs_root
*root
,
2878 struct btrfs_path
*path
, u64 dirid
,
2879 const char *name
, int name_len
);
2880 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2881 struct btrfs_root
*root
,
2882 struct btrfs_path
*path
,
2883 struct btrfs_dir_item
*di
);
2884 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2885 struct btrfs_root
*root
,
2886 struct btrfs_path
*path
, u64 objectid
,
2887 const char *name
, u16 name_len
,
2888 const void *data
, u16 data_len
);
2889 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2890 struct btrfs_root
*root
,
2891 struct btrfs_path
*path
, u64 dir
,
2892 const char *name
, u16 name_len
,
2894 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_fs_info
*fs_info
,
2895 struct btrfs_path
*path
,
2900 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2901 struct btrfs_root
*root
, u64 offset
);
2902 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2903 struct btrfs_root
*root
, u64 offset
);
2904 int btrfs_find_orphan_item(struct btrfs_root
*root
, u64 offset
);
2907 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2908 struct btrfs_root
*root
,
2909 const char *name
, int name_len
,
2910 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2911 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2912 struct btrfs_root
*root
,
2913 const char *name
, int name_len
,
2914 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2915 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2916 struct btrfs_root
*root
,
2917 struct btrfs_path
*path
, u64 objectid
);
2918 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2919 *root
, struct btrfs_path
*path
,
2920 struct btrfs_key
*location
, int mod
);
2922 struct btrfs_inode_extref
*
2923 btrfs_lookup_inode_extref(struct btrfs_trans_handle
*trans
,
2924 struct btrfs_root
*root
,
2925 struct btrfs_path
*path
,
2926 const char *name
, int name_len
,
2927 u64 inode_objectid
, u64 ref_objectid
, int ins_len
,
2930 struct btrfs_inode_ref
*btrfs_find_name_in_backref(struct extent_buffer
*leaf
,
2931 int slot
, const char *name
,
2933 struct btrfs_inode_extref
*btrfs_find_name_in_ext_backref(
2934 struct extent_buffer
*leaf
, int slot
, u64 ref_objectid
,
2935 const char *name
, int name_len
);
2937 struct btrfs_dio_private
;
2938 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2939 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2940 blk_status_t
btrfs_lookup_bio_sums(struct inode
*inode
, struct bio
*bio
,
2941 u64 offset
, u8
*dst
);
2942 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2943 struct btrfs_root
*root
,
2944 u64 objectid
, u64 pos
,
2945 u64 disk_offset
, u64 disk_num_bytes
,
2946 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2947 u8 compression
, u8 encryption
, u16 other_encoding
);
2948 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2949 struct btrfs_root
*root
,
2950 struct btrfs_path
*path
, u64 objectid
,
2951 u64 bytenr
, int mod
);
2952 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2953 struct btrfs_root
*root
,
2954 struct btrfs_ordered_sum
*sums
);
2955 blk_status_t
btrfs_csum_one_bio(struct btrfs_inode
*inode
, struct bio
*bio
,
2956 u64 file_start
, int contig
);
2957 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
, u64 end
,
2958 struct list_head
*list
, int search_commit
);
2959 void btrfs_extent_item_to_extent_map(struct btrfs_inode
*inode
,
2960 const struct btrfs_path
*path
,
2961 struct btrfs_file_extent_item
*fi
,
2962 const bool new_inline
,
2963 struct extent_map
*em
);
2964 int btrfs_inode_clear_file_extent_range(struct btrfs_inode
*inode
, u64 start
,
2966 int btrfs_inode_set_file_extent_range(struct btrfs_inode
*inode
, u64 start
,
2968 void btrfs_inode_safe_disk_i_size_write(struct inode
*inode
, u64 new_i_size
);
2969 u64
btrfs_file_extent_end(const struct btrfs_path
*path
);
2972 blk_status_t
btrfs_submit_data_bio(struct inode
*inode
, struct bio
*bio
,
2973 int mirror_num
, unsigned long bio_flags
);
2974 int btrfs_verify_data_csum(struct btrfs_io_bio
*io_bio
, u64 phy_offset
,
2975 struct page
*page
, u64 start
, u64 end
, int mirror
);
2976 struct extent_map
*btrfs_get_extent_fiemap(struct btrfs_inode
*inode
,
2977 u64 start
, u64 len
);
2978 noinline
int can_nocow_extent(struct inode
*inode
, u64 offset
, u64
*len
,
2979 u64
*orig_start
, u64
*orig_block_len
,
2980 u64
*ram_bytes
, bool strict
);
2982 void __btrfs_del_delalloc_inode(struct btrfs_root
*root
,
2983 struct btrfs_inode
*inode
);
2984 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2985 int btrfs_set_inode_index(struct btrfs_inode
*dir
, u64
*index
);
2986 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2987 struct btrfs_root
*root
,
2988 struct btrfs_inode
*dir
, struct btrfs_inode
*inode
,
2989 const char *name
, int name_len
);
2990 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2991 struct btrfs_inode
*parent_inode
, struct btrfs_inode
*inode
,
2992 const char *name
, int name_len
, int add_backref
, u64 index
);
2993 int btrfs_delete_subvolume(struct inode
*dir
, struct dentry
*dentry
);
2994 int btrfs_truncate_block(struct inode
*inode
, loff_t from
, loff_t len
,
2996 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2997 struct btrfs_root
*root
,
2998 struct inode
*inode
, u64 new_size
,
3001 int btrfs_start_delalloc_snapshot(struct btrfs_root
*root
);
3002 int btrfs_start_delalloc_roots(struct btrfs_fs_info
*fs_info
, u64 nr
);
3003 int btrfs_set_extent_delalloc(struct btrfs_inode
*inode
, u64 start
, u64 end
,
3004 unsigned int extra_bits
,
3005 struct extent_state
**cached_state
);
3006 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
3007 struct btrfs_root
*new_root
,
3008 struct btrfs_root
*parent_root
,
3010 void btrfs_set_delalloc_extent(struct inode
*inode
, struct extent_state
*state
,
3012 void btrfs_clear_delalloc_extent(struct inode
*inode
,
3013 struct extent_state
*state
, unsigned *bits
);
3014 void btrfs_merge_delalloc_extent(struct inode
*inode
, struct extent_state
*new,
3015 struct extent_state
*other
);
3016 void btrfs_split_delalloc_extent(struct inode
*inode
,
3017 struct extent_state
*orig
, u64 split
);
3018 int btrfs_bio_fits_in_stripe(struct page
*page
, size_t size
, struct bio
*bio
,
3019 unsigned long bio_flags
);
3020 void btrfs_set_range_writeback(struct extent_io_tree
*tree
, u64 start
, u64 end
);
3021 vm_fault_t
btrfs_page_mkwrite(struct vm_fault
*vmf
);
3022 int btrfs_readpage(struct file
*file
, struct page
*page
);
3023 void btrfs_evict_inode(struct inode
*inode
);
3024 int btrfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
3025 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
3026 void btrfs_destroy_inode(struct inode
*inode
);
3027 void btrfs_free_inode(struct inode
*inode
);
3028 int btrfs_drop_inode(struct inode
*inode
);
3029 int __init
btrfs_init_cachep(void);
3030 void __cold
btrfs_destroy_cachep(void);
3031 struct inode
*btrfs_iget_path(struct super_block
*s
, u64 ino
,
3032 struct btrfs_root
*root
, struct btrfs_path
*path
);
3033 struct inode
*btrfs_iget(struct super_block
*s
, u64 ino
, struct btrfs_root
*root
);
3034 struct extent_map
*btrfs_get_extent(struct btrfs_inode
*inode
,
3035 struct page
*page
, size_t pg_offset
,
3036 u64 start
, u64 end
);
3037 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
3038 struct btrfs_root
*root
,
3039 struct inode
*inode
);
3040 int btrfs_update_inode_fallback(struct btrfs_trans_handle
*trans
,
3041 struct btrfs_root
*root
, struct inode
*inode
);
3042 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
,
3043 struct btrfs_inode
*inode
);
3044 int btrfs_orphan_cleanup(struct btrfs_root
*root
);
3045 int btrfs_cont_expand(struct inode
*inode
, loff_t oldsize
, loff_t size
);
3046 void btrfs_add_delayed_iput(struct inode
*inode
);
3047 void btrfs_run_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3048 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info
*fs_info
);
3049 int btrfs_prealloc_file_range(struct inode
*inode
, int mode
,
3050 u64 start
, u64 num_bytes
, u64 min_size
,
3051 loff_t actual_len
, u64
*alloc_hint
);
3052 int btrfs_prealloc_file_range_trans(struct inode
*inode
,
3053 struct btrfs_trans_handle
*trans
, int mode
,
3054 u64 start
, u64 num_bytes
, u64 min_size
,
3055 loff_t actual_len
, u64
*alloc_hint
);
3056 int btrfs_run_delalloc_range(struct btrfs_inode
*inode
, struct page
*locked_page
,
3057 u64 start
, u64 end
, int *page_started
, unsigned long *nr_written
,
3058 struct writeback_control
*wbc
);
3059 int btrfs_writepage_cow_fixup(struct page
*page
, u64 start
, u64 end
);
3060 void btrfs_writepage_endio_finish_ordered(struct page
*page
, u64 start
,
3061 u64 end
, int uptodate
);
3062 extern const struct dentry_operations btrfs_dentry_operations
;
3063 ssize_t
btrfs_direct_IO(struct kiocb
*iocb
, struct iov_iter
*iter
);
3066 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3067 long btrfs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
3068 int btrfs_ioctl_get_supported_features(void __user
*arg
);
3069 void btrfs_sync_inode_flags_to_i_flags(struct inode
*inode
);
3070 int __pure
btrfs_is_empty_uuid(u8
*uuid
);
3071 int btrfs_defrag_file(struct inode
*inode
, struct file
*file
,
3072 struct btrfs_ioctl_defrag_range_args
*range
,
3073 u64 newer_than
, unsigned long max_pages
);
3074 void btrfs_get_block_group_info(struct list_head
*groups_list
,
3075 struct btrfs_ioctl_space_info
*space
);
3076 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info
*fs_info
,
3077 struct btrfs_ioctl_balance_args
*bargs
);
3078 bool btrfs_exclop_start(struct btrfs_fs_info
*fs_info
,
3079 enum btrfs_exclusive_operation type
);
3080 void btrfs_exclop_finish(struct btrfs_fs_info
*fs_info
);
3083 int __init
btrfs_auto_defrag_init(void);
3084 void __cold
btrfs_auto_defrag_exit(void);
3085 int btrfs_add_inode_defrag(struct btrfs_trans_handle
*trans
,
3086 struct btrfs_inode
*inode
);
3087 int btrfs_run_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3088 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info
*fs_info
);
3089 int btrfs_sync_file(struct file
*file
, loff_t start
, loff_t end
, int datasync
);
3090 void btrfs_drop_extent_cache(struct btrfs_inode
*inode
, u64 start
, u64 end
,
3092 extern const struct file_operations btrfs_file_operations
;
3093 int __btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3094 struct btrfs_root
*root
, struct btrfs_inode
*inode
,
3095 struct btrfs_path
*path
, u64 start
, u64 end
,
3096 u64
*drop_end
, int drop_cache
,
3098 u32 extent_item_size
,
3100 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
3101 struct btrfs_root
*root
, struct inode
*inode
, u64 start
,
3102 u64 end
, int drop_cache
);
3103 int btrfs_replace_file_extents(struct inode
*inode
, struct btrfs_path
*path
,
3104 const u64 start
, const u64 end
,
3105 struct btrfs_replace_extent_info
*extent_info
,
3106 struct btrfs_trans_handle
**trans_out
);
3107 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
3108 struct btrfs_inode
*inode
, u64 start
, u64 end
);
3109 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
3110 int btrfs_dirty_pages(struct btrfs_inode
*inode
, struct page
**pages
,
3111 size_t num_pages
, loff_t pos
, size_t write_bytes
,
3112 struct extent_state
**cached
);
3113 int btrfs_fdatawrite_range(struct inode
*inode
, loff_t start
, loff_t end
);
3114 int btrfs_check_nocow_lock(struct btrfs_inode
*inode
, loff_t pos
,
3115 size_t *write_bytes
);
3116 void btrfs_check_nocow_unlock(struct btrfs_inode
*inode
);
3119 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
3120 struct btrfs_root
*root
);
3123 int btrfs_parse_options(struct btrfs_fs_info
*info
, char *options
,
3124 unsigned long new_flags
);
3125 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
3126 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info
*fs_info
,
3127 u64 subvol_objectid
);
3129 static inline __printf(2, 3) __cold
3130 void btrfs_no_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...)
3134 #ifdef CONFIG_PRINTK
3137 void btrfs_printk(const struct btrfs_fs_info
*fs_info
, const char *fmt
, ...);
3139 #define btrfs_printk(fs_info, fmt, args...) \
3140 btrfs_no_printk(fs_info, fmt, ##args)
3143 #define btrfs_emerg(fs_info, fmt, args...) \
3144 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3145 #define btrfs_alert(fs_info, fmt, args...) \
3146 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3147 #define btrfs_crit(fs_info, fmt, args...) \
3148 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3149 #define btrfs_err(fs_info, fmt, args...) \
3150 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3151 #define btrfs_warn(fs_info, fmt, args...) \
3152 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3153 #define btrfs_notice(fs_info, fmt, args...) \
3154 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3155 #define btrfs_info(fs_info, fmt, args...) \
3156 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3159 * Wrappers that use printk_in_rcu
3161 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3162 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3163 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3164 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3165 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3166 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3167 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3168 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3169 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3170 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3171 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3172 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3173 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3174 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3177 * Wrappers that use a ratelimited printk_in_rcu
3179 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3180 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3181 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3182 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3183 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3184 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3185 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3186 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3187 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3188 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3189 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3190 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3191 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3192 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3195 * Wrappers that use a ratelimited printk
3197 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3198 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3199 #define btrfs_alert_rl(fs_info, fmt, args...) \
3200 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3201 #define btrfs_crit_rl(fs_info, fmt, args...) \
3202 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3203 #define btrfs_err_rl(fs_info, fmt, args...) \
3204 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3205 #define btrfs_warn_rl(fs_info, fmt, args...) \
3206 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3207 #define btrfs_notice_rl(fs_info, fmt, args...) \
3208 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3209 #define btrfs_info_rl(fs_info, fmt, args...) \
3210 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3212 #if defined(CONFIG_DYNAMIC_DEBUG)
3213 #define btrfs_debug(fs_info, fmt, args...) \
3214 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3215 fs_info, KERN_DEBUG fmt, ##args)
3216 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3217 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3218 fs_info, KERN_DEBUG fmt, ##args)
3219 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3220 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3221 fs_info, KERN_DEBUG fmt, ##args)
3222 #define btrfs_debug_rl(fs_info, fmt, args...) \
3223 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3224 fs_info, KERN_DEBUG fmt, ##args)
3225 #elif defined(DEBUG)
3226 #define btrfs_debug(fs_info, fmt, args...) \
3227 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3228 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3229 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3230 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3231 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3232 #define btrfs_debug_rl(fs_info, fmt, args...) \
3233 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3235 #define btrfs_debug(fs_info, fmt, args...) \
3236 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3237 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3238 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3239 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3240 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3241 #define btrfs_debug_rl(fs_info, fmt, args...) \
3242 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3245 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3248 btrfs_printk(fs_info, fmt, ##args); \
3249 rcu_read_unlock(); \
3252 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3255 btrfs_no_printk(fs_info, fmt, ##args); \
3256 rcu_read_unlock(); \
3259 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3261 static DEFINE_RATELIMIT_STATE(_rs, \
3262 DEFAULT_RATELIMIT_INTERVAL, \
3263 DEFAULT_RATELIMIT_BURST); \
3264 if (__ratelimit(&_rs)) \
3265 btrfs_printk(fs_info, fmt, ##args); \
3268 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3271 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3272 rcu_read_unlock(); \
3275 #ifdef CONFIG_BTRFS_ASSERT
3277 static inline void assertfail(const char *expr
, const char *file
, int line
)
3279 pr_err("assertion failed: %s, in %s:%d\n", expr
, file
, line
);
3283 #define ASSERT(expr) \
3284 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3287 static inline void assertfail(const char *expr
, const char* file
, int line
) { }
3288 #define ASSERT(expr) (void)(expr)
3292 * Use that for functions that are conditionally exported for sanity tests but
3295 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3296 #define EXPORT_FOR_TESTS static
3298 #define EXPORT_FOR_TESTS
3302 static inline void btrfs_print_v0_err(struct btrfs_fs_info
*fs_info
)
3305 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3310 void __btrfs_handle_fs_error(struct btrfs_fs_info
*fs_info
, const char *function
,
3311 unsigned int line
, int errno
, const char *fmt
, ...);
3313 const char * __attribute_const__
btrfs_decode_error(int errno
);
3316 void __btrfs_abort_transaction(struct btrfs_trans_handle
*trans
,
3317 const char *function
,
3318 unsigned int line
, int errno
);
3321 * Call btrfs_abort_transaction as early as possible when an error condition is
3322 * detected, that way the exact line number is reported.
3324 #define btrfs_abort_transaction(trans, errno) \
3326 /* Report first abort since mount */ \
3327 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3328 &((trans)->fs_info->fs_state))) { \
3329 if ((errno) != -EIO && (errno) != -EROFS) { \
3330 WARN(1, KERN_DEBUG \
3331 "BTRFS: Transaction aborted (error %d)\n", \
3334 btrfs_debug((trans)->fs_info, \
3335 "Transaction aborted (error %d)", \
3339 __btrfs_abort_transaction((trans), __func__, \
3340 __LINE__, (errno)); \
3343 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3345 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3346 (errno), fmt, ##args); \
3351 void __btrfs_panic(struct btrfs_fs_info
*fs_info
, const char *function
,
3352 unsigned int line
, int errno
, const char *fmt
, ...);
3354 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3355 * will panic(). Otherwise we BUG() here.
3357 #define btrfs_panic(fs_info, errno, fmt, args...) \
3359 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3364 /* compatibility and incompatibility defines */
3366 #define btrfs_set_fs_incompat(__fs_info, opt) \
3367 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3370 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info
*fs_info
,
3371 u64 flag
, const char* name
)
3373 struct btrfs_super_block
*disk_super
;
3376 disk_super
= fs_info
->super_copy
;
3377 features
= btrfs_super_incompat_flags(disk_super
);
3378 if (!(features
& flag
)) {
3379 spin_lock(&fs_info
->super_lock
);
3380 features
= btrfs_super_incompat_flags(disk_super
);
3381 if (!(features
& flag
)) {
3383 btrfs_set_super_incompat_flags(disk_super
, features
);
3385 "setting incompat feature flag for %s (0x%llx)",
3388 spin_unlock(&fs_info
->super_lock
);
3392 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3393 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3396 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info
*fs_info
,
3397 u64 flag
, const char* name
)
3399 struct btrfs_super_block
*disk_super
;
3402 disk_super
= fs_info
->super_copy
;
3403 features
= btrfs_super_incompat_flags(disk_super
);
3404 if (features
& flag
) {
3405 spin_lock(&fs_info
->super_lock
);
3406 features
= btrfs_super_incompat_flags(disk_super
);
3407 if (features
& flag
) {
3409 btrfs_set_super_incompat_flags(disk_super
, features
);
3411 "clearing incompat feature flag for %s (0x%llx)",
3414 spin_unlock(&fs_info
->super_lock
);
3418 #define btrfs_fs_incompat(fs_info, opt) \
3419 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3421 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info
*fs_info
, u64 flag
)
3423 struct btrfs_super_block
*disk_super
;
3424 disk_super
= fs_info
->super_copy
;
3425 return !!(btrfs_super_incompat_flags(disk_super
) & flag
);
3428 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3429 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3432 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3433 u64 flag
, const char *name
)
3435 struct btrfs_super_block
*disk_super
;
3438 disk_super
= fs_info
->super_copy
;
3439 features
= btrfs_super_compat_ro_flags(disk_super
);
3440 if (!(features
& flag
)) {
3441 spin_lock(&fs_info
->super_lock
);
3442 features
= btrfs_super_compat_ro_flags(disk_super
);
3443 if (!(features
& flag
)) {
3445 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3447 "setting compat-ro feature flag for %s (0x%llx)",
3450 spin_unlock(&fs_info
->super_lock
);
3454 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3455 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3458 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info
*fs_info
,
3459 u64 flag
, const char *name
)
3461 struct btrfs_super_block
*disk_super
;
3464 disk_super
= fs_info
->super_copy
;
3465 features
= btrfs_super_compat_ro_flags(disk_super
);
3466 if (features
& flag
) {
3467 spin_lock(&fs_info
->super_lock
);
3468 features
= btrfs_super_compat_ro_flags(disk_super
);
3469 if (features
& flag
) {
3471 btrfs_set_super_compat_ro_flags(disk_super
, features
);
3473 "clearing compat-ro feature flag for %s (0x%llx)",
3476 spin_unlock(&fs_info
->super_lock
);
3480 #define btrfs_fs_compat_ro(fs_info, opt) \
3481 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3483 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info
*fs_info
, u64 flag
)
3485 struct btrfs_super_block
*disk_super
;
3486 disk_super
= fs_info
->super_copy
;
3487 return !!(btrfs_super_compat_ro_flags(disk_super
) & flag
);
3491 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3492 struct posix_acl
*btrfs_get_acl(struct inode
*inode
, int type
);
3493 int btrfs_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
3494 int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3495 struct inode
*inode
, struct inode
*dir
);
3497 #define btrfs_get_acl NULL
3498 #define btrfs_set_acl NULL
3499 static inline int btrfs_init_acl(struct btrfs_trans_handle
*trans
,
3500 struct inode
*inode
, struct inode
*dir
)
3507 int btrfs_relocate_block_group(struct btrfs_fs_info
*fs_info
, u64 group_start
);
3508 int btrfs_init_reloc_root(struct btrfs_trans_handle
*trans
,
3509 struct btrfs_root
*root
);
3510 int btrfs_update_reloc_root(struct btrfs_trans_handle
*trans
,
3511 struct btrfs_root
*root
);
3512 int btrfs_recover_relocation(struct btrfs_root
*root
);
3513 int btrfs_reloc_clone_csums(struct btrfs_inode
*inode
, u64 file_pos
, u64 len
);
3514 int btrfs_reloc_cow_block(struct btrfs_trans_handle
*trans
,
3515 struct btrfs_root
*root
, struct extent_buffer
*buf
,
3516 struct extent_buffer
*cow
);
3517 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot
*pending
,
3518 u64
*bytes_to_reserve
);
3519 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle
*trans
,
3520 struct btrfs_pending_snapshot
*pending
);
3521 int btrfs_should_cancel_balance(struct btrfs_fs_info
*fs_info
);
3522 struct btrfs_root
*find_reloc_root(struct btrfs_fs_info
*fs_info
,
3524 int btrfs_should_ignore_reloc_root(struct btrfs_root
*root
);
3527 int btrfs_scrub_dev(struct btrfs_fs_info
*fs_info
, u64 devid
, u64 start
,
3528 u64 end
, struct btrfs_scrub_progress
*progress
,
3529 int readonly
, int is_dev_replace
);
3530 void btrfs_scrub_pause(struct btrfs_fs_info
*fs_info
);
3531 void btrfs_scrub_continue(struct btrfs_fs_info
*fs_info
);
3532 int btrfs_scrub_cancel(struct btrfs_fs_info
*info
);
3533 int btrfs_scrub_cancel_dev(struct btrfs_device
*dev
);
3534 int btrfs_scrub_progress(struct btrfs_fs_info
*fs_info
, u64 devid
,
3535 struct btrfs_scrub_progress
*progress
);
3536 static inline void btrfs_init_full_stripe_locks_tree(
3537 struct btrfs_full_stripe_locks_tree
*locks_root
)
3539 locks_root
->root
= RB_ROOT
;
3540 mutex_init(&locks_root
->lock
);
3544 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info
*fs_info
);
3545 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info
*fs_info
);
3546 void btrfs_bio_counter_sub(struct btrfs_fs_info
*fs_info
, s64 amount
);
3548 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info
*fs_info
)
3550 btrfs_bio_counter_sub(fs_info
, 1);
3554 struct reada_control
{
3555 struct btrfs_fs_info
*fs_info
; /* tree to prefetch */
3556 struct btrfs_key key_start
;
3557 struct btrfs_key key_end
; /* exclusive */
3560 wait_queue_head_t wait
;
3562 struct reada_control
*btrfs_reada_add(struct btrfs_root
*root
,
3563 struct btrfs_key
*start
, struct btrfs_key
*end
);
3564 int btrfs_reada_wait(void *handle
);
3565 void btrfs_reada_detach(void *handle
);
3566 int btree_readahead_hook(struct extent_buffer
*eb
, int err
);
3568 static inline int is_fstree(u64 rootid
)
3570 if (rootid
== BTRFS_FS_TREE_OBJECTID
||
3571 ((s64
)rootid
>= (s64
)BTRFS_FIRST_FREE_OBJECTID
&&
3572 !btrfs_qgroup_level(rootid
)))
3577 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info
*fs_info
)
3579 return signal_pending(current
);
3582 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3584 /* Sanity test specific functions */
3585 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3586 void btrfs_test_destroy_inode(struct inode
*inode
);
3587 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)
3589 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
, &fs_info
->fs_state
);
3592 static inline int btrfs_is_testing(struct btrfs_fs_info
*fs_info
)