1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <linux/kobject.h>
20 #include <trace/events/btrfs.h>
21 #include <asm/kmap_types.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle;
36 struct btrfs_transaction;
37 struct btrfs_pending_snapshot;
38 extern struct kmem_cache *btrfs_trans_handle_cachep;
39 extern struct kmem_cache *btrfs_bit_radix_cachep;
40 extern struct kmem_cache *btrfs_path_cachep;
41 extern struct kmem_cache *btrfs_free_space_cachep;
42 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
43 struct btrfs_ordered_sum;
45 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
46 #define STATIC noinline
48 #define STATIC static noinline
51 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
53 #define BTRFS_MAX_MIRRORS 3
55 #define BTRFS_MAX_LEVEL 8
57 #define BTRFS_OLDEST_GENERATION 0ULL
60 * the max metadata block size. This limit is somewhat artificial,
61 * but the memmove costs go through the roof for larger blocks.
63 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
66 * we can actually store much bigger names, but lets not confuse the rest
69 #define BTRFS_NAME_LEN 255
72 * Theoretical limit is larger, but we keep this down to a sane
73 * value. That should limit greatly the possibility of collisions on
76 #define BTRFS_LINK_MAX 65535U
78 /* four bytes for CRC32 */
79 static const int btrfs_csum_sizes[] = { 4 };
81 #define BTRFS_EMPTY_DIR_SIZE 0
83 /* ioprio of readahead is set to idle */
84 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
86 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
89 * Use large batch size to reduce overhead of metadata updates. On the reader
90 * side, we only read it when we are close to ENOSPC and the read overhead is
91 * mostly related to the number of CPUs, so it is OK to use arbitrary large
94 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
96 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
100 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
102 static inline u32 count_max_extents(u64 size)
104 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
107 struct btrfs_mapping_tree {
108 struct extent_map_tree map_tree;
111 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
113 BUG_ON(num_stripes == 0);
114 return sizeof(struct btrfs_chunk) +
115 sizeof(struct btrfs_stripe) * (num_stripes - 1);
121 #define BTRFS_FS_STATE_ERROR 0
122 #define BTRFS_FS_STATE_REMOUNTING 1
123 #define BTRFS_FS_STATE_TRANS_ABORTED 2
124 #define BTRFS_FS_STATE_DEV_REPLACING 3
125 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
127 #define BTRFS_BACKREF_REV_MAX 256
128 #define BTRFS_BACKREF_REV_SHIFT 56
129 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
130 BTRFS_BACKREF_REV_SHIFT)
132 #define BTRFS_OLD_BACKREF_REV 0
133 #define BTRFS_MIXED_BACKREF_REV 1
136 * every tree block (leaf or node) starts with this header.
138 struct btrfs_header {
139 /* these first four must match the super block */
140 u8 csum[BTRFS_CSUM_SIZE];
141 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
142 __le64 bytenr; /* which block this node is supposed to live in */
145 /* allowed to be different from the super from here on down */
146 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
151 } __attribute__ ((__packed__));
154 * this is a very generous portion of the super block, giving us
155 * room to translate 14 chunks with 3 stripes each.
157 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
160 * just in case we somehow lose the roots and are not able to mount,
161 * we store an array of the roots from previous transactions
164 #define BTRFS_NUM_BACKUP_ROOTS 4
165 struct btrfs_root_backup {
167 __le64 tree_root_gen;
170 __le64 chunk_root_gen;
173 __le64 extent_root_gen;
182 __le64 csum_root_gen;
192 u8 extent_root_level;
196 /* future and to align */
198 } __attribute__ ((__packed__));
201 * the super block basically lists the main trees of the FS
202 * it currently lacks any block count etc etc
204 struct btrfs_super_block {
205 u8 csum[BTRFS_CSUM_SIZE];
206 /* the first 4 fields must match struct btrfs_header */
207 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
208 __le64 bytenr; /* this block number */
211 /* allowed to be different from the btrfs_header from here own down */
218 /* this will help find the new super based on the log root */
219 __le64 log_root_transid;
222 __le64 root_dir_objectid;
226 __le32 __unused_leafsize;
228 __le32 sys_chunk_array_size;
229 __le64 chunk_root_generation;
231 __le64 compat_ro_flags;
232 __le64 incompat_flags;
237 struct btrfs_dev_item dev_item;
239 char label[BTRFS_LABEL_SIZE];
241 __le64 cache_generation;
242 __le64 uuid_tree_generation;
244 /* future expansion */
246 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
247 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
248 } __attribute__ ((__packed__));
251 * Compat flags that we support. If any incompat flags are set other than the
252 * ones specified below then we will fail to mount
254 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
255 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
256 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
258 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
259 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
260 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
262 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
263 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
265 #define BTRFS_FEATURE_INCOMPAT_SUPP \
266 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
267 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
268 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
269 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
270 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
271 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
272 BTRFS_FEATURE_INCOMPAT_RAID56 | \
273 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
274 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
275 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
277 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
278 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
279 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
282 * A leaf is full of items. offset and size tell us where to find
283 * the item in the leaf (relative to the start of the data area)
286 struct btrfs_disk_key key;
289 } __attribute__ ((__packed__));
292 * leaves have an item area and a data area:
293 * [item0, item1....itemN] [free space] [dataN...data1, data0]
295 * The data is separate from the items to get the keys closer together
299 struct btrfs_header header;
300 struct btrfs_item items[];
301 } __attribute__ ((__packed__));
304 * all non-leaf blocks are nodes, they hold only keys and pointers to
307 struct btrfs_key_ptr {
308 struct btrfs_disk_key key;
311 } __attribute__ ((__packed__));
314 struct btrfs_header header;
315 struct btrfs_key_ptr ptrs[];
316 } __attribute__ ((__packed__));
319 * btrfs_paths remember the path taken from the root down to the leaf.
320 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
321 * to any other levels that are present.
323 * The slots array records the index of the item or block pointer
324 * used while walking the tree.
326 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
328 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
329 int slots[BTRFS_MAX_LEVEL];
330 /* if there is real range locking, this locks field will change */
331 u8 locks[BTRFS_MAX_LEVEL];
333 /* keep some upper locks as we walk down */
337 * set by btrfs_split_item, tells search_slot to keep all locks
338 * and to force calls to keep space in the nodes
340 unsigned int search_for_split:1;
341 unsigned int keep_locks:1;
342 unsigned int skip_locking:1;
343 unsigned int leave_spinning:1;
344 unsigned int search_commit_root:1;
345 unsigned int need_commit_sem:1;
346 unsigned int skip_release_on_error:1;
348 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
349 sizeof(struct btrfs_item))
350 struct btrfs_dev_replace {
351 u64 replace_state; /* see #define above */
352 time64_t time_started; /* seconds since 1-Jan-1970 */
353 time64_t time_stopped; /* seconds since 1-Jan-1970 */
354 atomic64_t num_write_errors;
355 atomic64_t num_uncorrectable_read_errors;
358 u64 committed_cursor_left;
359 u64 cursor_left_last_write_of_item;
362 u64 cont_reading_from_srcdev_mode; /* see #define above */
365 int item_needs_writeback;
366 struct btrfs_device *srcdev;
367 struct btrfs_device *tgtdev;
369 struct mutex lock_finishing_cancel_unmount;
372 atomic_t blocking_readers;
373 wait_queue_head_t read_lock_wq;
375 struct btrfs_scrub_progress scrub_progress;
378 /* For raid type sysfs entries */
379 struct raid_kobject {
382 struct list_head list;
385 struct btrfs_space_info {
388 u64 total_bytes; /* total bytes in the space,
389 this doesn't take mirrors into account */
390 u64 bytes_used; /* total bytes used,
391 this doesn't take mirrors into account */
392 u64 bytes_pinned; /* total bytes pinned, will be freed when the
393 transaction finishes */
394 u64 bytes_reserved; /* total bytes the allocator has reserved for
395 current allocations */
396 u64 bytes_may_use; /* number of bytes that may be used for
397 delalloc/allocations */
398 u64 bytes_readonly; /* total bytes that are read only */
400 u64 max_extent_size; /* This will hold the maximum extent size of
401 the space info if we had an ENOSPC in the
404 unsigned int full:1; /* indicates that we cannot allocate any more
405 chunks for this space */
406 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
408 unsigned int flush:1; /* set if we are trying to make space */
410 unsigned int force_alloc; /* set if we need to force a chunk
411 alloc for this space */
413 u64 disk_used; /* total bytes used on disk */
414 u64 disk_total; /* total bytes on disk, takes mirrors into
420 * bytes_pinned is kept in line with what is actually pinned, as in
421 * we've called update_block_group and dropped the bytes_used counter
422 * and increased the bytes_pinned counter. However this means that
423 * bytes_pinned does not reflect the bytes that will be pinned once the
424 * delayed refs are flushed, so this counter is inc'ed every time we
425 * call btrfs_free_extent so it is a realtime count of what will be
426 * freed once the transaction is committed. It will be zeroed every
427 * time the transaction commits.
429 struct percpu_counter total_bytes_pinned;
431 struct list_head list;
432 /* Protected by the spinlock 'lock'. */
433 struct list_head ro_bgs;
434 struct list_head priority_tickets;
435 struct list_head tickets;
437 * tickets_id just indicates the next ticket will be handled, so note
438 * it's not stored per ticket.
442 struct rw_semaphore groups_sem;
443 /* for block groups in our same type */
444 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
445 wait_queue_head_t wait;
448 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
451 #define BTRFS_BLOCK_RSV_GLOBAL 1
452 #define BTRFS_BLOCK_RSV_DELALLOC 2
453 #define BTRFS_BLOCK_RSV_TRANS 3
454 #define BTRFS_BLOCK_RSV_CHUNK 4
455 #define BTRFS_BLOCK_RSV_DELOPS 5
456 #define BTRFS_BLOCK_RSV_EMPTY 6
457 #define BTRFS_BLOCK_RSV_TEMP 7
459 struct btrfs_block_rsv {
462 struct btrfs_space_info *space_info;
466 unsigned short failfast;
469 * Qgroup equivalent for @size @reserved
471 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
472 * about things like csum size nor how many tree blocks it will need to
475 * Qgroup cares more about net change of the extent usage.
477 * So for one newly inserted file extent, in worst case it will cause
478 * leaf split and level increase, nodesize for each file extent is
481 * In short, qgroup_size/reserved is the upper limit of possible needed
482 * qgroup metadata reservation.
485 u64 qgroup_rsv_reserved;
489 * free clusters are used to claim free space in relatively large chunks,
490 * allowing us to do less seeky writes. They are used for all metadata
491 * allocations. In ssd_spread mode they are also used for data allocations.
493 struct btrfs_free_cluster {
495 spinlock_t refill_lock;
498 /* largest extent in this cluster */
501 /* first extent starting offset */
504 /* We did a full search and couldn't create a cluster */
507 struct btrfs_block_group_cache *block_group;
509 * when a cluster is allocated from a block group, we put the
510 * cluster onto a list in the block group so that it can
511 * be freed before the block group is freed.
513 struct list_head block_group_list;
516 enum btrfs_caching_type {
518 BTRFS_CACHE_STARTED = 1,
519 BTRFS_CACHE_FAST = 2,
520 BTRFS_CACHE_FINISHED = 3,
521 BTRFS_CACHE_ERROR = 4,
524 enum btrfs_disk_cache_state {
525 BTRFS_DC_WRITTEN = 0,
531 struct btrfs_caching_control {
532 struct list_head list;
534 wait_queue_head_t wait;
535 struct btrfs_work work;
536 struct btrfs_block_group_cache *block_group;
541 /* Once caching_thread() finds this much free space, it will wake up waiters. */
542 #define CACHING_CTL_WAKE_UP SZ_2M
544 struct btrfs_io_ctl {
548 struct btrfs_fs_info *fs_info;
555 unsigned check_crcs:1;
559 * Tree to record all locked full stripes of a RAID5/6 block group
561 struct btrfs_full_stripe_locks_tree {
566 struct btrfs_block_group_cache {
567 struct btrfs_key key;
568 struct btrfs_block_group_item item;
569 struct btrfs_fs_info *fs_info;
577 u64 cache_generation;
580 * If the free space extent count exceeds this number, convert the block
583 u32 bitmap_high_thresh;
586 * If the free space extent count drops below this number, convert the
587 * block group back to extents.
589 u32 bitmap_low_thresh;
592 * It is just used for the delayed data space allocation because
593 * only the data space allocation and the relative metadata update
594 * can be done cross the transaction.
596 struct rw_semaphore data_rwsem;
598 /* for raid56, this is a full stripe, without parity */
599 unsigned long full_stripe_len;
603 unsigned int has_caching_ctl:1;
604 unsigned int removed:1;
606 int disk_cache_state;
608 /* cache tracking stuff */
610 struct btrfs_caching_control *caching_ctl;
611 u64 last_byte_to_unpin;
613 struct btrfs_space_info *space_info;
615 /* free space cache stuff */
616 struct btrfs_free_space_ctl *free_space_ctl;
618 /* block group cache stuff */
619 struct rb_node cache_node;
621 /* for block groups in the same raid type */
622 struct list_head list;
627 /* List of struct btrfs_free_clusters for this block group.
628 * Today it will only have one thing on it, but that may change
630 struct list_head cluster_list;
632 /* For delayed block group creation or deletion of empty block groups */
633 struct list_head bg_list;
635 /* For read-only block groups */
636 struct list_head ro_list;
640 /* For dirty block groups */
641 struct list_head dirty_list;
642 struct list_head io_list;
644 struct btrfs_io_ctl io_ctl;
647 * Incremented when doing extent allocations and holding a read lock
648 * on the space_info's groups_sem semaphore.
649 * Decremented when an ordered extent that represents an IO against this
650 * block group's range is created (after it's added to its inode's
651 * root's list of ordered extents) or immediately after the allocation
652 * if it's a metadata extent or fallocate extent (for these cases we
653 * don't create ordered extents).
655 atomic_t reservations;
658 * Incremented while holding the spinlock *lock* by a task checking if
659 * it can perform a nocow write (incremented if the value for the *ro*
660 * field is 0). Decremented by such tasks once they create an ordered
661 * extent or before that if some error happens before reaching that step.
662 * This is to prevent races between block group relocation and nocow
663 * writes through direct IO.
665 atomic_t nocow_writers;
667 /* Lock for free space tree operations. */
668 struct mutex free_space_lock;
671 * Does the block group need to be added to the free space tree?
672 * Protected by free_space_lock.
674 int needs_free_space;
676 /* Record locked full stripes for RAID5/6 block group */
677 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
680 /* delayed seq elem */
682 struct list_head list;
686 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
688 #define SEQ_LAST ((u64)-1)
690 enum btrfs_orphan_cleanup_state {
691 ORPHAN_CLEANUP_STARTED = 1,
692 ORPHAN_CLEANUP_DONE = 2,
695 /* used by the raid56 code to lock stripes for read/modify/write */
696 struct btrfs_stripe_hash {
697 struct list_head hash_list;
701 /* used by the raid56 code to lock stripes for read/modify/write */
702 struct btrfs_stripe_hash_table {
703 struct list_head stripe_cache;
704 spinlock_t cache_lock;
706 struct btrfs_stripe_hash table[];
709 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
711 void btrfs_init_async_reclaim_work(struct work_struct *work);
714 struct reloc_control;
716 struct btrfs_fs_devices;
717 struct btrfs_balance_control;
718 struct btrfs_delayed_root;
720 #define BTRFS_FS_BARRIER 1
721 #define BTRFS_FS_CLOSING_START 2
722 #define BTRFS_FS_CLOSING_DONE 3
723 #define BTRFS_FS_LOG_RECOVERING 4
724 #define BTRFS_FS_OPEN 5
725 #define BTRFS_FS_QUOTA_ENABLED 6
726 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
727 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
728 #define BTRFS_FS_BTREE_ERR 11
729 #define BTRFS_FS_LOG1_ERR 12
730 #define BTRFS_FS_LOG2_ERR 13
731 #define BTRFS_FS_QUOTA_OVERRIDE 14
732 /* Used to record internally whether fs has been frozen */
733 #define BTRFS_FS_FROZEN 15
736 * Indicate that a whole-filesystem exclusive operation is running
737 * (device replace, resize, device add/delete, balance)
739 #define BTRFS_FS_EXCL_OP 16
742 * To info transaction_kthread we need an immediate commit so it doesn't
743 * need to wait for commit_interval
745 #define BTRFS_FS_NEED_ASYNC_COMMIT 17
748 * Indicate that balance has been set up from the ioctl and is in the main
749 * phase. The fs_info::balance_ctl is initialized.
751 #define BTRFS_FS_BALANCE_RUNNING 18
753 struct btrfs_fs_info {
754 u8 fsid[BTRFS_FSID_SIZE];
755 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
757 struct btrfs_root *extent_root;
758 struct btrfs_root *tree_root;
759 struct btrfs_root *chunk_root;
760 struct btrfs_root *dev_root;
761 struct btrfs_root *fs_root;
762 struct btrfs_root *csum_root;
763 struct btrfs_root *quota_root;
764 struct btrfs_root *uuid_root;
765 struct btrfs_root *free_space_root;
767 /* the log root tree is a directory of all the other log roots */
768 struct btrfs_root *log_root_tree;
770 spinlock_t fs_roots_radix_lock;
771 struct radix_tree_root fs_roots_radix;
773 /* block group cache stuff */
774 spinlock_t block_group_cache_lock;
775 u64 first_logical_byte;
776 struct rb_root block_group_cache_tree;
778 /* keep track of unallocated space */
779 atomic64_t free_chunk_space;
781 struct extent_io_tree freed_extents[2];
782 struct extent_io_tree *pinned_extents;
784 /* logical->physical extent mapping */
785 struct btrfs_mapping_tree mapping_tree;
788 * block reservation for extent, checksum, root tree and
789 * delayed dir index item
791 struct btrfs_block_rsv global_block_rsv;
792 /* block reservation for metadata operations */
793 struct btrfs_block_rsv trans_block_rsv;
794 /* block reservation for chunk tree */
795 struct btrfs_block_rsv chunk_block_rsv;
796 /* block reservation for delayed operations */
797 struct btrfs_block_rsv delayed_block_rsv;
799 struct btrfs_block_rsv empty_block_rsv;
802 u64 last_trans_committed;
803 u64 avg_delayed_ref_runtime;
806 * this is updated to the current trans every time a full commit
807 * is required instead of the faster short fsync log commits
809 u64 last_trans_log_full_commit;
810 unsigned long mount_opt;
812 * Track requests for actions that need to be done during transaction
813 * commit (like for some mount options).
815 unsigned long pending_changes;
816 unsigned long compress_type:4;
817 unsigned int compress_level;
820 * It is a suggestive number, the read side is safe even it gets a
821 * wrong number because we will write out the data into a regular
822 * extent. The write side(mount/remount) is under ->s_umount lock,
823 * so it is also safe.
827 struct btrfs_transaction *running_transaction;
828 wait_queue_head_t transaction_throttle;
829 wait_queue_head_t transaction_wait;
830 wait_queue_head_t transaction_blocked_wait;
831 wait_queue_head_t async_submit_wait;
834 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
835 * when they are updated.
837 * Because we do not clear the flags for ever, so we needn't use
838 * the lock on the read side.
840 * We also needn't use the lock when we mount the fs, because
841 * there is no other task which will update the flag.
843 spinlock_t super_lock;
844 struct btrfs_super_block *super_copy;
845 struct btrfs_super_block *super_for_commit;
846 struct super_block *sb;
847 struct inode *btree_inode;
848 struct mutex tree_log_mutex;
849 struct mutex transaction_kthread_mutex;
850 struct mutex cleaner_mutex;
851 struct mutex chunk_mutex;
854 * this is taken to make sure we don't set block groups ro after
855 * the free space cache has been allocated on them
857 struct mutex ro_block_group_mutex;
859 /* this is used during read/modify/write to make sure
860 * no two ios are trying to mod the same stripe at the same
863 struct btrfs_stripe_hash_table *stripe_hash_table;
866 * this protects the ordered operations list only while we are
867 * processing all of the entries on it. This way we make
868 * sure the commit code doesn't find the list temporarily empty
869 * because another function happens to be doing non-waiting preflush
870 * before jumping into the main commit.
872 struct mutex ordered_operations_mutex;
874 struct rw_semaphore commit_root_sem;
876 struct rw_semaphore cleanup_work_sem;
878 struct rw_semaphore subvol_sem;
879 struct srcu_struct subvol_srcu;
881 spinlock_t trans_lock;
883 * the reloc mutex goes with the trans lock, it is taken
884 * during commit to protect us from the relocation code
886 struct mutex reloc_mutex;
888 struct list_head trans_list;
889 struct list_head dead_roots;
890 struct list_head caching_block_groups;
892 spinlock_t delayed_iput_lock;
893 struct list_head delayed_iputs;
894 struct mutex cleaner_delayed_iput_mutex;
896 atomic64_t tree_mod_seq;
898 /* this protects tree_mod_log and tree_mod_seq_list */
899 rwlock_t tree_mod_log_lock;
900 struct rb_root tree_mod_log;
901 struct list_head tree_mod_seq_list;
903 atomic_t async_delalloc_pages;
906 * this is used to protect the following list -- ordered_roots.
908 spinlock_t ordered_root_lock;
911 * all fs/file tree roots in which there are data=ordered extents
912 * pending writeback are added into this list.
914 * these can span multiple transactions and basically include
915 * every dirty data page that isn't from nodatacow
917 struct list_head ordered_roots;
919 struct mutex delalloc_root_mutex;
920 spinlock_t delalloc_root_lock;
921 /* all fs/file tree roots that have delalloc inodes. */
922 struct list_head delalloc_roots;
925 * there is a pool of worker threads for checksumming during writes
926 * and a pool for checksumming after reads. This is because readers
927 * can run with FS locks held, and the writers may be waiting for
928 * those locks. We don't want ordering in the pending list to cause
929 * deadlocks, and so the two are serviced separately.
931 * A third pool does submit_bio to avoid deadlocking with the other
934 struct btrfs_workqueue *workers;
935 struct btrfs_workqueue *delalloc_workers;
936 struct btrfs_workqueue *flush_workers;
937 struct btrfs_workqueue *endio_workers;
938 struct btrfs_workqueue *endio_meta_workers;
939 struct btrfs_workqueue *endio_raid56_workers;
940 struct btrfs_workqueue *endio_repair_workers;
941 struct btrfs_workqueue *rmw_workers;
942 struct btrfs_workqueue *endio_meta_write_workers;
943 struct btrfs_workqueue *endio_write_workers;
944 struct btrfs_workqueue *endio_freespace_worker;
945 struct btrfs_workqueue *submit_workers;
946 struct btrfs_workqueue *caching_workers;
947 struct btrfs_workqueue *readahead_workers;
950 * fixup workers take dirty pages that didn't properly go through
951 * the cow mechanism and make them safe to write. It happens
952 * for the sys_munmap function call path
954 struct btrfs_workqueue *fixup_workers;
955 struct btrfs_workqueue *delayed_workers;
957 /* the extent workers do delayed refs on the extent allocation tree */
958 struct btrfs_workqueue *extent_workers;
959 struct task_struct *transaction_kthread;
960 struct task_struct *cleaner_kthread;
961 u32 thread_pool_size;
963 struct kobject *space_info_kobj;
964 struct list_head pending_raid_kobjs;
965 spinlock_t pending_raid_kobjs_lock; /* uncontended */
969 /* used to keep from writing metadata until there is a nice batch */
970 struct percpu_counter dirty_metadata_bytes;
971 struct percpu_counter delalloc_bytes;
972 s32 dirty_metadata_batch;
975 struct list_head dirty_cowonly_roots;
977 struct btrfs_fs_devices *fs_devices;
980 * The space_info list is effectively read only after initial
981 * setup. It is populated at mount time and cleaned up after
982 * all block groups are removed. RCU is used to protect it.
984 struct list_head space_info;
986 struct btrfs_space_info *data_sinfo;
988 struct reloc_control *reloc_ctl;
990 /* data_alloc_cluster is only used in ssd_spread mode */
991 struct btrfs_free_cluster data_alloc_cluster;
993 /* all metadata allocations go through this cluster */
994 struct btrfs_free_cluster meta_alloc_cluster;
996 /* auto defrag inodes go here */
997 spinlock_t defrag_inodes_lock;
998 struct rb_root defrag_inodes;
999 atomic_t defrag_running;
1001 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1002 seqlock_t profiles_lock;
1004 * these three are in extended format (availability of single
1005 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1006 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1008 u64 avail_data_alloc_bits;
1009 u64 avail_metadata_alloc_bits;
1010 u64 avail_system_alloc_bits;
1012 /* restriper state */
1013 spinlock_t balance_lock;
1014 struct mutex balance_mutex;
1015 atomic_t balance_pause_req;
1016 atomic_t balance_cancel_req;
1017 struct btrfs_balance_control *balance_ctl;
1018 wait_queue_head_t balance_wait_q;
1020 u32 data_chunk_allocations;
1025 /* private scrub information */
1026 struct mutex scrub_lock;
1027 atomic_t scrubs_running;
1028 atomic_t scrub_pause_req;
1029 atomic_t scrubs_paused;
1030 atomic_t scrub_cancel_req;
1031 wait_queue_head_t scrub_pause_wait;
1032 int scrub_workers_refcnt;
1033 struct btrfs_workqueue *scrub_workers;
1034 struct btrfs_workqueue *scrub_wr_completion_workers;
1035 struct btrfs_workqueue *scrub_nocow_workers;
1036 struct btrfs_workqueue *scrub_parity_workers;
1038 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1039 u32 check_integrity_print_mask;
1041 /* is qgroup tracking in a consistent state? */
1044 /* holds configuration and tracking. Protected by qgroup_lock */
1045 struct rb_root qgroup_tree;
1046 struct rb_root qgroup_op_tree;
1047 spinlock_t qgroup_lock;
1048 spinlock_t qgroup_op_lock;
1049 atomic_t qgroup_op_seq;
1052 * used to avoid frequently calling ulist_alloc()/ulist_free()
1053 * when doing qgroup accounting, it must be protected by qgroup_lock.
1055 struct ulist *qgroup_ulist;
1057 /* protect user change for quota operations */
1058 struct mutex qgroup_ioctl_lock;
1060 /* list of dirty qgroups to be written at next commit */
1061 struct list_head dirty_qgroups;
1063 /* used by qgroup for an efficient tree traversal */
1066 /* qgroup rescan items */
1067 struct mutex qgroup_rescan_lock; /* protects the progress item */
1068 struct btrfs_key qgroup_rescan_progress;
1069 struct btrfs_workqueue *qgroup_rescan_workers;
1070 struct completion qgroup_rescan_completion;
1071 struct btrfs_work qgroup_rescan_work;
1072 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1074 /* filesystem state */
1075 unsigned long fs_state;
1077 struct btrfs_delayed_root *delayed_root;
1079 /* readahead tree */
1080 spinlock_t reada_lock;
1081 struct radix_tree_root reada_tree;
1083 /* readahead works cnt */
1084 atomic_t reada_works_cnt;
1086 /* Extent buffer radix tree */
1087 spinlock_t buffer_lock;
1088 struct radix_tree_root buffer_radix;
1090 /* next backup root to be overwritten */
1091 int backup_root_index;
1093 /* device replace state */
1094 struct btrfs_dev_replace dev_replace;
1096 struct percpu_counter bio_counter;
1097 wait_queue_head_t replace_wait;
1099 struct semaphore uuid_tree_rescan_sem;
1101 /* Used to reclaim the metadata space in the background. */
1102 struct work_struct async_reclaim_work;
1104 spinlock_t unused_bgs_lock;
1105 struct list_head unused_bgs;
1106 struct mutex unused_bg_unpin_mutex;
1107 struct mutex delete_unused_bgs_mutex;
1109 /* For btrfs to record security options */
1110 struct security_mnt_opts security_opts;
1113 * Chunks that can't be freed yet (under a trim/discard operation)
1114 * and will be latter freed. Protected by fs_info->chunk_mutex.
1116 struct list_head pinned_chunks;
1118 /* Cached block sizes */
1123 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1124 spinlock_t ref_verify_lock;
1125 struct rb_root block_tree;
1129 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1131 return sb->s_fs_info;
1134 struct btrfs_subvolume_writers {
1135 struct percpu_counter counter;
1136 wait_queue_head_t wait;
1140 * The state of btrfs root
1143 * btrfs_record_root_in_trans is a multi-step process,
1144 * and it can race with the balancing code. But the
1145 * race is very small, and only the first time the root
1146 * is added to each transaction. So IN_TRANS_SETUP
1147 * is used to tell us when more checks are required
1149 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1150 #define BTRFS_ROOT_REF_COWS 1
1151 #define BTRFS_ROOT_TRACK_DIRTY 2
1152 #define BTRFS_ROOT_IN_RADIX 3
1153 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1154 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1155 #define BTRFS_ROOT_FORCE_COW 6
1156 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1157 #define BTRFS_ROOT_DIRTY 8
1160 * in ram representation of the tree. extent_root is used for all allocations
1161 * and for the extent tree extent_root root.
1164 struct extent_buffer *node;
1166 struct extent_buffer *commit_root;
1167 struct btrfs_root *log_root;
1168 struct btrfs_root *reloc_root;
1170 unsigned long state;
1171 struct btrfs_root_item root_item;
1172 struct btrfs_key root_key;
1173 struct btrfs_fs_info *fs_info;
1174 struct extent_io_tree dirty_log_pages;
1176 struct mutex objectid_mutex;
1178 spinlock_t accounting_lock;
1179 struct btrfs_block_rsv *block_rsv;
1181 /* free ino cache stuff */
1182 struct btrfs_free_space_ctl *free_ino_ctl;
1183 enum btrfs_caching_type ino_cache_state;
1184 spinlock_t ino_cache_lock;
1185 wait_queue_head_t ino_cache_wait;
1186 struct btrfs_free_space_ctl *free_ino_pinned;
1187 u64 ino_cache_progress;
1188 struct inode *ino_cache_inode;
1190 struct mutex log_mutex;
1191 wait_queue_head_t log_writer_wait;
1192 wait_queue_head_t log_commit_wait[2];
1193 struct list_head log_ctxs[2];
1194 atomic_t log_writers;
1195 atomic_t log_commit[2];
1198 /* No matter the commit succeeds or not*/
1199 int log_transid_committed;
1200 /* Just be updated when the commit succeeds. */
1201 int last_log_commit;
1202 pid_t log_start_pid;
1209 u64 highest_objectid;
1211 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1212 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1216 u64 defrag_trans_start;
1217 struct btrfs_key defrag_progress;
1218 struct btrfs_key defrag_max;
1220 /* the dirty list is only used by non-reference counted roots */
1221 struct list_head dirty_list;
1223 struct list_head root_list;
1225 spinlock_t log_extents_lock[2];
1226 struct list_head logged_list[2];
1228 int orphan_cleanup_state;
1230 spinlock_t inode_lock;
1231 /* red-black tree that keeps track of in-memory inodes */
1232 struct rb_root inode_tree;
1235 * radix tree that keeps track of delayed nodes of every inode,
1236 * protected by inode_lock
1238 struct radix_tree_root delayed_nodes_tree;
1240 * right now this just gets used so that a root has its own devid
1241 * for stat. It may be used for more later
1245 spinlock_t root_item_lock;
1248 struct mutex delalloc_mutex;
1249 spinlock_t delalloc_lock;
1251 * all of the inodes that have delalloc bytes. It is possible for
1252 * this list to be empty even when there is still dirty data=ordered
1253 * extents waiting to finish IO.
1255 struct list_head delalloc_inodes;
1256 struct list_head delalloc_root;
1257 u64 nr_delalloc_inodes;
1259 struct mutex ordered_extent_mutex;
1261 * this is used by the balancing code to wait for all the pending
1264 spinlock_t ordered_extent_lock;
1267 * all of the data=ordered extents pending writeback
1268 * these can span multiple transactions and basically include
1269 * every dirty data page that isn't from nodatacow
1271 struct list_head ordered_extents;
1272 struct list_head ordered_root;
1273 u64 nr_ordered_extents;
1276 * Number of currently running SEND ioctls to prevent
1277 * manipulation with the read-only status via SUBVOL_SETFLAGS
1279 int send_in_progress;
1280 struct btrfs_subvolume_writers *subv_writers;
1281 atomic_t will_be_snapshotted;
1282 atomic_t snapshot_force_cow;
1284 /* For qgroup metadata reserved space */
1285 spinlock_t qgroup_meta_rsv_lock;
1286 u64 qgroup_meta_rsv_pertrans;
1287 u64 qgroup_meta_rsv_prealloc;
1290 struct btrfs_file_private {
1294 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1296 return btrfs_sb(inode->i_sb)->sectorsize;
1299 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1302 return info->nodesize - sizeof(struct btrfs_header);
1305 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1307 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1309 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1312 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1314 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1317 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1318 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1319 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1321 return BTRFS_MAX_ITEM_SIZE(info) -
1322 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1325 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1327 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1331 * Flags for mount options.
1333 * Note: don't forget to add new options to btrfs_show_options()
1335 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1336 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1337 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1338 #define BTRFS_MOUNT_SSD (1 << 3)
1339 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1340 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1341 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1342 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1343 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1344 #define BTRFS_MOUNT_NOSSD (1 << 9)
1345 #define BTRFS_MOUNT_DISCARD (1 << 10)
1346 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1347 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1348 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1349 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1350 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1351 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1352 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1353 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1354 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1355 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1356 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1357 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1358 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1359 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1360 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1361 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1362 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1363 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1365 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1366 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1368 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1369 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1370 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1371 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1374 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1376 if (!btrfs_test_opt(fs_info, opt)) \
1377 btrfs_info(fs_info, fmt, ##args); \
1378 btrfs_set_opt(fs_info->mount_opt, opt); \
1381 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1383 if (btrfs_test_opt(fs_info, opt)) \
1384 btrfs_info(fs_info, fmt, ##args); \
1385 btrfs_clear_opt(fs_info->mount_opt, opt); \
1388 #ifdef CONFIG_BTRFS_DEBUG
1390 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1392 struct btrfs_fs_info *fs_info = block_group->fs_info;
1394 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1395 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1396 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1397 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1402 * Requests for changes that need to be done during transaction commit.
1404 * Internal mount options that are used for special handling of the real
1405 * mount options (eg. cannot be set during remount and have to be set during
1406 * transaction commit)
1409 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1410 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1411 #define BTRFS_PENDING_COMMIT (2)
1413 #define btrfs_test_pending(info, opt) \
1414 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1415 #define btrfs_set_pending(info, opt) \
1416 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1417 #define btrfs_clear_pending(info, opt) \
1418 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1421 * Helpers for setting pending mount option changes.
1423 * Expects corresponding macros
1424 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1426 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1428 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1429 btrfs_info((info), fmt, ##args); \
1430 btrfs_set_pending((info), SET_##opt); \
1431 btrfs_clear_pending((info), CLEAR_##opt); \
1435 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1437 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1438 btrfs_info((info), fmt, ##args); \
1439 btrfs_set_pending((info), CLEAR_##opt); \
1440 btrfs_clear_pending((info), SET_##opt); \
1447 #define BTRFS_INODE_NODATASUM (1 << 0)
1448 #define BTRFS_INODE_NODATACOW (1 << 1)
1449 #define BTRFS_INODE_READONLY (1 << 2)
1450 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1451 #define BTRFS_INODE_PREALLOC (1 << 4)
1452 #define BTRFS_INODE_SYNC (1 << 5)
1453 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1454 #define BTRFS_INODE_APPEND (1 << 7)
1455 #define BTRFS_INODE_NODUMP (1 << 8)
1456 #define BTRFS_INODE_NOATIME (1 << 9)
1457 #define BTRFS_INODE_DIRSYNC (1 << 10)
1458 #define BTRFS_INODE_COMPRESS (1 << 11)
1460 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1462 #define BTRFS_INODE_FLAG_MASK \
1463 (BTRFS_INODE_NODATASUM | \
1464 BTRFS_INODE_NODATACOW | \
1465 BTRFS_INODE_READONLY | \
1466 BTRFS_INODE_NOCOMPRESS | \
1467 BTRFS_INODE_PREALLOC | \
1468 BTRFS_INODE_SYNC | \
1469 BTRFS_INODE_IMMUTABLE | \
1470 BTRFS_INODE_APPEND | \
1471 BTRFS_INODE_NODUMP | \
1472 BTRFS_INODE_NOATIME | \
1473 BTRFS_INODE_DIRSYNC | \
1474 BTRFS_INODE_COMPRESS | \
1475 BTRFS_INODE_ROOT_ITEM_INIT)
1477 struct btrfs_map_token {
1478 const struct extent_buffer *eb;
1480 unsigned long offset;
1483 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1484 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1486 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1488 token->kaddr = NULL;
1491 /* some macros to generate set/get functions for the struct fields. This
1492 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1495 #define le8_to_cpu(v) (v)
1496 #define cpu_to_le8(v) (v)
1499 #define read_eb_member(eb, ptr, type, member, result) (\
1500 read_extent_buffer(eb, (char *)(result), \
1501 ((unsigned long)(ptr)) + \
1502 offsetof(type, member), \
1503 sizeof(((type *)0)->member)))
1505 #define write_eb_member(eb, ptr, type, member, result) (\
1506 write_extent_buffer(eb, (char *)(result), \
1507 ((unsigned long)(ptr)) + \
1508 offsetof(type, member), \
1509 sizeof(((type *)0)->member)))
1511 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1512 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1513 const void *ptr, unsigned long off, \
1514 struct btrfs_map_token *token); \
1515 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1516 unsigned long off, u##bits val, \
1517 struct btrfs_map_token *token); \
1518 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1520 unsigned long off) \
1522 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1524 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1525 unsigned long off, u##bits val) \
1527 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1530 DECLARE_BTRFS_SETGET_BITS(8)
1531 DECLARE_BTRFS_SETGET_BITS(16)
1532 DECLARE_BTRFS_SETGET_BITS(32)
1533 DECLARE_BTRFS_SETGET_BITS(64)
1535 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1536 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1539 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1540 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1542 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1545 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1546 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1548 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1550 struct btrfs_map_token *token) \
1552 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1553 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1555 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1556 type *s, u##bits val, \
1557 struct btrfs_map_token *token) \
1559 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1560 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1563 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1564 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1566 const type *p = page_address(eb->pages[0]); \
1567 u##bits res = le##bits##_to_cpu(p->member); \
1570 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1573 type *p = page_address(eb->pages[0]); \
1574 p->member = cpu_to_le##bits(val); \
1577 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1578 static inline u##bits btrfs_##name(const type *s) \
1580 return le##bits##_to_cpu(s->member); \
1582 static inline void btrfs_set_##name(type *s, u##bits val) \
1584 s->member = cpu_to_le##bits(val); \
1588 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1589 struct btrfs_dev_item *s)
1591 BUILD_BUG_ON(sizeof(u64) !=
1592 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1593 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1596 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1597 struct btrfs_dev_item *s,
1600 BUILD_BUG_ON(sizeof(u64) !=
1601 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1602 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1603 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1607 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1608 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1609 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1610 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1611 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1613 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1614 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1615 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1616 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1617 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1618 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1621 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1623 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1625 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1627 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1629 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1631 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1632 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1634 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1636 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1638 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1641 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1643 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1646 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1648 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1651 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1652 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1653 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1654 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1655 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1656 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1657 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1658 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1659 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1660 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1661 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1663 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1665 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1668 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1670 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1672 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1676 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1678 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1679 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1681 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1683 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1684 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1686 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1689 unsigned long offset = (unsigned long)c;
1690 offset += offsetof(struct btrfs_chunk, stripe);
1691 offset += nr * sizeof(struct btrfs_stripe);
1692 return (struct btrfs_stripe *)offset;
1695 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1697 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1700 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1701 struct btrfs_chunk *c, int nr)
1703 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1706 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1707 struct btrfs_chunk *c, int nr)
1709 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1712 /* struct btrfs_block_group_item */
1713 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1715 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1717 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1718 struct btrfs_block_group_item, chunk_objectid, 64);
1720 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1721 struct btrfs_block_group_item, chunk_objectid, 64);
1722 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1723 struct btrfs_block_group_item, flags, 64);
1724 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1725 struct btrfs_block_group_item, flags, 64);
1727 /* struct btrfs_free_space_info */
1728 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1730 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1732 /* struct btrfs_inode_ref */
1733 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1734 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1736 /* struct btrfs_inode_extref */
1737 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1738 parent_objectid, 64);
1739 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1741 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1743 /* struct btrfs_inode_item */
1744 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1745 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1746 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1747 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1748 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1749 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1750 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1751 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1752 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1753 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1754 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1755 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1762 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1763 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1765 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1767 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1768 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1769 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1770 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1771 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1772 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1773 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1774 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1775 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1776 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1778 /* struct btrfs_dev_extent */
1779 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1781 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1782 chunk_objectid, 64);
1783 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1785 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1787 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1789 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1790 return (unsigned long)dev + ptr;
1793 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1794 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1796 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1798 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1801 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1803 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1804 struct btrfs_tree_block_info *item,
1805 struct btrfs_disk_key *key)
1807 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1810 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1811 struct btrfs_tree_block_info *item,
1812 struct btrfs_disk_key *key)
1814 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1817 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1819 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1821 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1823 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1826 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1829 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1831 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1834 static inline u32 btrfs_extent_inline_ref_size(int type)
1836 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1837 type == BTRFS_SHARED_BLOCK_REF_KEY)
1838 return sizeof(struct btrfs_extent_inline_ref);
1839 if (type == BTRFS_SHARED_DATA_REF_KEY)
1840 return sizeof(struct btrfs_shared_data_ref) +
1841 sizeof(struct btrfs_extent_inline_ref);
1842 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1843 return sizeof(struct btrfs_extent_data_ref) +
1844 offsetof(struct btrfs_extent_inline_ref, offset);
1848 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1849 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1851 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1852 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1854 /* struct btrfs_node */
1855 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1856 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1857 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1859 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1862 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1865 ptr = offsetof(struct btrfs_node, ptrs) +
1866 sizeof(struct btrfs_key_ptr) * nr;
1867 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1870 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1874 ptr = offsetof(struct btrfs_node, ptrs) +
1875 sizeof(struct btrfs_key_ptr) * nr;
1876 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1879 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1882 ptr = offsetof(struct btrfs_node, ptrs) +
1883 sizeof(struct btrfs_key_ptr) * nr;
1884 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1887 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1891 ptr = offsetof(struct btrfs_node, ptrs) +
1892 sizeof(struct btrfs_key_ptr) * nr;
1893 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1896 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1898 return offsetof(struct btrfs_node, ptrs) +
1899 sizeof(struct btrfs_key_ptr) * nr;
1902 void btrfs_node_key(const struct extent_buffer *eb,
1903 struct btrfs_disk_key *disk_key, int nr);
1905 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1906 struct btrfs_disk_key *disk_key, int nr)
1909 ptr = btrfs_node_key_ptr_offset(nr);
1910 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1911 struct btrfs_key_ptr, key, disk_key);
1914 /* struct btrfs_item */
1915 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1916 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1917 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1918 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1920 static inline unsigned long btrfs_item_nr_offset(int nr)
1922 return offsetof(struct btrfs_leaf, items) +
1923 sizeof(struct btrfs_item) * nr;
1926 static inline struct btrfs_item *btrfs_item_nr(int nr)
1928 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1931 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1932 struct btrfs_item *item)
1934 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1937 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1939 return btrfs_item_end(eb, btrfs_item_nr(nr));
1942 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1944 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1947 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1949 return btrfs_item_size(eb, btrfs_item_nr(nr));
1952 static inline void btrfs_item_key(const struct extent_buffer *eb,
1953 struct btrfs_disk_key *disk_key, int nr)
1955 struct btrfs_item *item = btrfs_item_nr(nr);
1956 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1959 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1960 struct btrfs_disk_key *disk_key, int nr)
1962 struct btrfs_item *item = btrfs_item_nr(nr);
1963 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1966 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1969 * struct btrfs_root_ref
1971 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1972 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1973 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1975 /* struct btrfs_dir_item */
1976 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1977 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1978 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1979 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1980 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1981 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1983 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1985 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1988 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1989 const struct btrfs_dir_item *item,
1990 struct btrfs_disk_key *key)
1992 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1995 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1996 struct btrfs_dir_item *item,
1997 const struct btrfs_disk_key *key)
1999 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2002 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2004 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2006 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2009 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2010 const struct btrfs_free_space_header *h,
2011 struct btrfs_disk_key *key)
2013 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2016 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2017 struct btrfs_free_space_header *h,
2018 const struct btrfs_disk_key *key)
2020 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2023 /* struct btrfs_disk_key */
2024 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2026 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2027 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2029 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2030 const struct btrfs_disk_key *disk)
2032 cpu->offset = le64_to_cpu(disk->offset);
2033 cpu->type = disk->type;
2034 cpu->objectid = le64_to_cpu(disk->objectid);
2037 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2038 const struct btrfs_key *cpu)
2040 disk->offset = cpu_to_le64(cpu->offset);
2041 disk->type = cpu->type;
2042 disk->objectid = cpu_to_le64(cpu->objectid);
2045 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2046 struct btrfs_key *key, int nr)
2048 struct btrfs_disk_key disk_key;
2049 btrfs_node_key(eb, &disk_key, nr);
2050 btrfs_disk_key_to_cpu(key, &disk_key);
2053 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2054 struct btrfs_key *key, int nr)
2056 struct btrfs_disk_key disk_key;
2057 btrfs_item_key(eb, &disk_key, nr);
2058 btrfs_disk_key_to_cpu(key, &disk_key);
2061 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2062 const struct btrfs_dir_item *item,
2063 struct btrfs_key *key)
2065 struct btrfs_disk_key disk_key;
2066 btrfs_dir_item_key(eb, item, &disk_key);
2067 btrfs_disk_key_to_cpu(key, &disk_key);
2070 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2075 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2080 /* struct btrfs_header */
2081 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2082 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2084 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2085 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2086 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2087 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2088 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2090 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2091 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2093 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2095 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2097 return (btrfs_header_flags(eb) & flag) == flag;
2100 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2102 u64 flags = btrfs_header_flags(eb);
2103 btrfs_set_header_flags(eb, flags | flag);
2104 return (flags & flag) == flag;
2107 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2109 u64 flags = btrfs_header_flags(eb);
2110 btrfs_set_header_flags(eb, flags & ~flag);
2111 return (flags & flag) == flag;
2114 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2116 u64 flags = btrfs_header_flags(eb);
2117 return flags >> BTRFS_BACKREF_REV_SHIFT;
2120 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2123 u64 flags = btrfs_header_flags(eb);
2124 flags &= ~BTRFS_BACKREF_REV_MASK;
2125 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2126 btrfs_set_header_flags(eb, flags);
2129 static inline unsigned long btrfs_header_fsid(void)
2131 return offsetof(struct btrfs_header, fsid);
2134 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2136 return offsetof(struct btrfs_header, chunk_tree_uuid);
2139 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2141 return btrfs_header_level(eb) == 0;
2144 /* struct btrfs_root_item */
2145 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2147 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2148 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2149 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2151 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2153 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2154 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2155 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2156 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2157 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2158 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2159 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2160 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2162 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2164 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2166 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2168 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2170 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2173 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2175 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2178 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2180 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2183 /* struct btrfs_root_backup */
2184 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2186 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2188 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2189 tree_root_level, 8);
2191 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2193 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2194 chunk_root_gen, 64);
2195 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2196 chunk_root_level, 8);
2198 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2200 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2201 extent_root_gen, 64);
2202 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2203 extent_root_level, 8);
2205 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2207 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2209 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2212 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2214 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2216 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2219 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2221 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2223 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2224 csum_root_level, 8);
2225 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2227 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2229 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2232 /* struct btrfs_balance_item */
2233 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2235 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2236 const struct btrfs_balance_item *bi,
2237 struct btrfs_disk_balance_args *ba)
2239 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2242 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2243 struct btrfs_balance_item *bi,
2244 const struct btrfs_disk_balance_args *ba)
2246 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2249 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2250 const struct btrfs_balance_item *bi,
2251 struct btrfs_disk_balance_args *ba)
2253 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2256 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2257 struct btrfs_balance_item *bi,
2258 const struct btrfs_disk_balance_args *ba)
2260 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2263 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2264 const struct btrfs_balance_item *bi,
2265 struct btrfs_disk_balance_args *ba)
2267 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2270 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2271 struct btrfs_balance_item *bi,
2272 const struct btrfs_disk_balance_args *ba)
2274 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2278 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2279 const struct btrfs_disk_balance_args *disk)
2281 memset(cpu, 0, sizeof(*cpu));
2283 cpu->profiles = le64_to_cpu(disk->profiles);
2284 cpu->usage = le64_to_cpu(disk->usage);
2285 cpu->devid = le64_to_cpu(disk->devid);
2286 cpu->pstart = le64_to_cpu(disk->pstart);
2287 cpu->pend = le64_to_cpu(disk->pend);
2288 cpu->vstart = le64_to_cpu(disk->vstart);
2289 cpu->vend = le64_to_cpu(disk->vend);
2290 cpu->target = le64_to_cpu(disk->target);
2291 cpu->flags = le64_to_cpu(disk->flags);
2292 cpu->limit = le64_to_cpu(disk->limit);
2293 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2294 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2298 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2299 const struct btrfs_balance_args *cpu)
2301 memset(disk, 0, sizeof(*disk));
2303 disk->profiles = cpu_to_le64(cpu->profiles);
2304 disk->usage = cpu_to_le64(cpu->usage);
2305 disk->devid = cpu_to_le64(cpu->devid);
2306 disk->pstart = cpu_to_le64(cpu->pstart);
2307 disk->pend = cpu_to_le64(cpu->pend);
2308 disk->vstart = cpu_to_le64(cpu->vstart);
2309 disk->vend = cpu_to_le64(cpu->vend);
2310 disk->target = cpu_to_le64(cpu->target);
2311 disk->flags = cpu_to_le64(cpu->flags);
2312 disk->limit = cpu_to_le64(cpu->limit);
2313 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2314 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2317 /* struct btrfs_super_block */
2318 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2319 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2320 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2322 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2323 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2324 struct btrfs_super_block, sys_chunk_array_size, 32);
2325 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2326 struct btrfs_super_block, chunk_root_generation, 64);
2327 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2329 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2331 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2332 chunk_root_level, 8);
2333 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2335 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2336 log_root_transid, 64);
2337 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2339 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2341 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2343 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2345 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2347 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2349 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2350 root_dir_objectid, 64);
2351 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2353 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2355 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2356 compat_ro_flags, 64);
2357 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2358 incompat_flags, 64);
2359 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2361 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2362 cache_generation, 64);
2363 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2364 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2365 uuid_tree_generation, 64);
2367 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2369 u16 t = btrfs_super_csum_type(s);
2371 * csum type is validated at mount time
2373 return btrfs_csum_sizes[t];
2378 * The leaf data grows from end-to-front in the node.
2379 * this returns the address of the start of the last item,
2380 * which is the stop of the leaf data stack
2382 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2383 const struct extent_buffer *leaf)
2385 u32 nr = btrfs_header_nritems(leaf);
2388 return BTRFS_LEAF_DATA_SIZE(fs_info);
2389 return btrfs_item_offset_nr(leaf, nr - 1);
2392 /* struct btrfs_file_extent_item */
2393 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2394 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2395 struct btrfs_file_extent_item, disk_bytenr, 64);
2396 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2397 struct btrfs_file_extent_item, offset, 64);
2398 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2399 struct btrfs_file_extent_item, generation, 64);
2400 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2401 struct btrfs_file_extent_item, num_bytes, 64);
2402 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2403 struct btrfs_file_extent_item, disk_num_bytes, 64);
2404 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2405 struct btrfs_file_extent_item, compression, 8);
2407 static inline unsigned long
2408 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2410 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2413 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2415 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2418 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2420 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2422 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2423 disk_num_bytes, 64);
2424 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2426 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2428 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2430 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2432 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2434 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2435 other_encoding, 16);
2438 * this returns the number of bytes used by the item on disk, minus the
2439 * size of any extent headers. If a file is compressed on disk, this is
2440 * the compressed size
2442 static inline u32 btrfs_file_extent_inline_item_len(
2443 const struct extent_buffer *eb,
2444 struct btrfs_item *e)
2446 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2449 /* btrfs_dev_stats_item */
2450 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2451 const struct btrfs_dev_stats_item *ptr,
2456 read_extent_buffer(eb, &val,
2457 offsetof(struct btrfs_dev_stats_item, values) +
2458 ((unsigned long)ptr) + (index * sizeof(u64)),
2463 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2464 struct btrfs_dev_stats_item *ptr,
2467 write_extent_buffer(eb, &val,
2468 offsetof(struct btrfs_dev_stats_item, values) +
2469 ((unsigned long)ptr) + (index * sizeof(u64)),
2473 /* btrfs_qgroup_status_item */
2474 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2476 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2478 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2480 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2483 /* btrfs_qgroup_info_item */
2484 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2486 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2487 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2489 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2490 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2493 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2494 struct btrfs_qgroup_info_item, generation, 64);
2495 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2497 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2498 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2499 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2501 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2502 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2504 /* btrfs_qgroup_limit_item */
2505 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2507 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2509 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2511 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2513 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2516 /* btrfs_dev_replace_item */
2517 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2518 struct btrfs_dev_replace_item, src_devid, 64);
2519 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2520 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2522 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2524 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2526 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2528 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2529 num_write_errors, 64);
2530 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2531 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2533 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2535 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2538 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2539 struct btrfs_dev_replace_item, src_devid, 64);
2540 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2541 struct btrfs_dev_replace_item,
2542 cont_reading_from_srcdev_mode, 64);
2543 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2544 struct btrfs_dev_replace_item, replace_state, 64);
2545 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2546 struct btrfs_dev_replace_item, time_started, 64);
2547 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2548 struct btrfs_dev_replace_item, time_stopped, 64);
2549 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2550 struct btrfs_dev_replace_item, num_write_errors, 64);
2551 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2552 struct btrfs_dev_replace_item,
2553 num_uncorrectable_read_errors, 64);
2554 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2555 struct btrfs_dev_replace_item, cursor_left, 64);
2556 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2557 struct btrfs_dev_replace_item, cursor_right, 64);
2559 /* helper function to cast into the data area of the leaf. */
2560 #define btrfs_item_ptr(leaf, slot, type) \
2561 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2562 btrfs_item_offset_nr(leaf, slot)))
2564 #define btrfs_item_ptr_offset(leaf, slot) \
2565 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2566 btrfs_item_offset_nr(leaf, slot)))
2568 static inline u64 btrfs_name_hash(const char *name, int len)
2570 return crc32c((u32)~1, name, len);
2574 * Figure the key offset of an extended inode ref
2576 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2579 return (u64) crc32c(parent_objectid, name, len);
2582 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2584 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2585 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2588 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2590 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2595 enum btrfs_inline_ref_type {
2596 BTRFS_REF_TYPE_INVALID = 0,
2597 BTRFS_REF_TYPE_BLOCK = 1,
2598 BTRFS_REF_TYPE_DATA = 2,
2599 BTRFS_REF_TYPE_ANY = 3,
2602 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2603 struct btrfs_extent_inline_ref *iref,
2604 enum btrfs_inline_ref_type is_data);
2606 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2608 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2611 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2615 * Doing a truncate won't result in new nodes or leaves, just what we need for
2618 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2621 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2624 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2625 struct btrfs_fs_info *fs_info);
2626 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2627 struct btrfs_fs_info *fs_info);
2628 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2630 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2631 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2632 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2633 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2634 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2635 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2636 unsigned long count);
2637 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2638 unsigned long count, u64 transid, int wait);
2639 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2640 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2641 struct btrfs_fs_info *fs_info, u64 bytenr,
2642 u64 offset, int metadata, u64 *refs, u64 *flags);
2643 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2644 u64 bytenr, u64 num, int reserved);
2645 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2646 u64 bytenr, u64 num_bytes);
2647 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2648 struct extent_buffer *eb);
2649 int btrfs_cross_ref_exist(struct btrfs_root *root,
2650 u64 objectid, u64 offset, u64 bytenr);
2651 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2652 struct btrfs_fs_info *info,
2654 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2655 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2656 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2657 struct btrfs_root *root,
2658 u64 parent, u64 root_objectid,
2659 const struct btrfs_disk_key *key,
2660 int level, u64 hint,
2662 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2663 struct btrfs_root *root,
2664 struct extent_buffer *buf,
2665 u64 parent, int last_ref);
2666 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2667 struct btrfs_root *root, u64 owner,
2668 u64 offset, u64 ram_bytes,
2669 struct btrfs_key *ins);
2670 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2671 u64 root_objectid, u64 owner, u64 offset,
2672 struct btrfs_key *ins);
2673 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2674 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2675 struct btrfs_key *ins, int is_data, int delalloc);
2676 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2677 struct extent_buffer *buf, int full_backref);
2678 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2679 struct extent_buffer *buf, int full_backref);
2680 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2681 struct btrfs_fs_info *fs_info,
2682 u64 bytenr, u64 num_bytes, u64 flags,
2683 int level, int is_data);
2684 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2685 struct btrfs_root *root,
2686 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2687 u64 owner, u64 offset);
2689 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2690 u64 start, u64 len, int delalloc);
2691 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2692 u64 start, u64 len);
2693 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2694 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2695 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2696 struct btrfs_root *root,
2697 u64 bytenr, u64 num_bytes, u64 parent,
2698 u64 root_objectid, u64 owner, u64 offset);
2700 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2701 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2702 struct btrfs_fs_info *fs_info);
2703 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2704 struct btrfs_fs_info *fs_info);
2705 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2706 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2707 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2708 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2709 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2710 u64 bytes_used, u64 type, u64 chunk_offset,
2712 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2713 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2714 struct btrfs_fs_info *fs_info,
2715 const u64 chunk_offset);
2716 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2717 u64 group_start, struct extent_map *em);
2718 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2719 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2720 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2721 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2722 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2723 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2724 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2725 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2727 enum btrfs_reserve_flush_enum {
2728 /* If we are in the transaction, we can't flush anything.*/
2729 BTRFS_RESERVE_NO_FLUSH,
2731 * Flushing delalloc may cause deadlock somewhere, in this
2732 * case, use FLUSH LIMIT
2734 BTRFS_RESERVE_FLUSH_LIMIT,
2735 BTRFS_RESERVE_FLUSH_ALL,
2738 enum btrfs_flush_state {
2739 FLUSH_DELAYED_ITEMS_NR = 1,
2740 FLUSH_DELAYED_ITEMS = 2,
2742 FLUSH_DELALLOC_WAIT = 4,
2747 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2748 int btrfs_check_data_free_space(struct inode *inode,
2749 struct extent_changeset **reserved, u64 start, u64 len);
2750 void btrfs_free_reserved_data_space(struct inode *inode,
2751 struct extent_changeset *reserved, u64 start, u64 len);
2752 void btrfs_delalloc_release_space(struct inode *inode,
2753 struct extent_changeset *reserved,
2754 u64 start, u64 len, bool qgroup_free);
2755 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2757 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2758 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2759 struct btrfs_block_rsv *rsv,
2760 int nitems, bool use_global_rsv);
2761 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2762 struct btrfs_block_rsv *rsv);
2763 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2765 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2766 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2768 int btrfs_delalloc_reserve_space(struct inode *inode,
2769 struct extent_changeset **reserved, u64 start, u64 len);
2770 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2771 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2772 unsigned short type);
2773 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2774 struct btrfs_block_rsv *rsv,
2775 unsigned short type);
2776 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2777 struct btrfs_block_rsv *rsv);
2778 int btrfs_block_rsv_add(struct btrfs_root *root,
2779 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2780 enum btrfs_reserve_flush_enum flush);
2781 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2782 int btrfs_block_rsv_refill(struct btrfs_root *root,
2783 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2784 enum btrfs_reserve_flush_enum flush);
2785 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2786 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2788 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2789 struct btrfs_block_rsv *dest, u64 num_bytes,
2791 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2792 struct btrfs_block_rsv *block_rsv,
2794 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2795 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2796 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2797 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2798 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2799 u64 start, u64 end);
2800 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2801 u64 num_bytes, u64 *actual_bytes);
2802 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2803 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2805 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2806 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2807 struct btrfs_fs_info *fs_info);
2808 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2809 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2810 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2811 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2812 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2813 u64 start, u64 end);
2814 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2817 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2818 int level, int *slot);
2819 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2820 int btrfs_previous_item(struct btrfs_root *root,
2821 struct btrfs_path *path, u64 min_objectid,
2823 int btrfs_previous_extent_item(struct btrfs_root *root,
2824 struct btrfs_path *path, u64 min_objectid);
2825 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2826 struct btrfs_path *path,
2827 const struct btrfs_key *new_key);
2828 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2829 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2830 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2831 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2832 struct btrfs_key *key, int lowest_level,
2834 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2835 struct btrfs_path *path,
2837 enum btrfs_compare_tree_result {
2838 BTRFS_COMPARE_TREE_NEW,
2839 BTRFS_COMPARE_TREE_DELETED,
2840 BTRFS_COMPARE_TREE_CHANGED,
2841 BTRFS_COMPARE_TREE_SAME,
2843 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2844 struct btrfs_path *right_path,
2845 struct btrfs_key *key,
2846 enum btrfs_compare_tree_result result,
2848 int btrfs_compare_trees(struct btrfs_root *left_root,
2849 struct btrfs_root *right_root,
2850 btrfs_changed_cb_t cb, void *ctx);
2851 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2852 struct btrfs_root *root, struct extent_buffer *buf,
2853 struct extent_buffer *parent, int parent_slot,
2854 struct extent_buffer **cow_ret);
2855 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2856 struct btrfs_root *root,
2857 struct extent_buffer *buf,
2858 struct extent_buffer **cow_ret, u64 new_root_objectid);
2859 int btrfs_block_can_be_shared(struct btrfs_root *root,
2860 struct extent_buffer *buf);
2861 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2863 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2864 struct btrfs_path *path, u32 new_size, int from_end);
2865 int btrfs_split_item(struct btrfs_trans_handle *trans,
2866 struct btrfs_root *root,
2867 struct btrfs_path *path,
2868 const struct btrfs_key *new_key,
2869 unsigned long split_offset);
2870 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root,
2872 struct btrfs_path *path,
2873 const struct btrfs_key *new_key);
2874 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2875 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2876 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2877 const struct btrfs_key *key, struct btrfs_path *p,
2878 int ins_len, int cow);
2879 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2880 struct btrfs_path *p, u64 time_seq);
2881 int btrfs_search_slot_for_read(struct btrfs_root *root,
2882 const struct btrfs_key *key,
2883 struct btrfs_path *p, int find_higher,
2885 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2886 struct btrfs_root *root, struct extent_buffer *parent,
2887 int start_slot, u64 *last_ret,
2888 struct btrfs_key *progress);
2889 void btrfs_release_path(struct btrfs_path *p);
2890 struct btrfs_path *btrfs_alloc_path(void);
2891 void btrfs_free_path(struct btrfs_path *p);
2892 void btrfs_set_path_blocking(struct btrfs_path *p);
2893 void btrfs_clear_path_blocking(struct btrfs_path *p,
2894 struct extent_buffer *held, int held_rw);
2895 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2897 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2898 struct btrfs_path *path, int slot, int nr);
2899 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2900 struct btrfs_root *root,
2901 struct btrfs_path *path)
2903 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2906 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2907 const struct btrfs_key *cpu_key, u32 *data_size,
2908 u32 total_data, u32 total_size, int nr);
2909 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2910 const struct btrfs_key *key, void *data, u32 data_size);
2911 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2912 struct btrfs_root *root,
2913 struct btrfs_path *path,
2914 const struct btrfs_key *cpu_key, u32 *data_size,
2917 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2918 struct btrfs_root *root,
2919 struct btrfs_path *path,
2920 const struct btrfs_key *key,
2923 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2926 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2927 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2928 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2930 static inline int btrfs_next_old_item(struct btrfs_root *root,
2931 struct btrfs_path *p, u64 time_seq)
2934 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2935 return btrfs_next_old_leaf(root, p, time_seq);
2938 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2940 return btrfs_next_old_item(root, p, 0);
2942 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2943 struct extent_buffer *leaf);
2944 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2945 struct btrfs_block_rsv *block_rsv,
2946 int update_ref, int for_reloc);
2947 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2948 struct btrfs_root *root,
2949 struct extent_buffer *node,
2950 struct extent_buffer *parent);
2951 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2954 * Do it this way so we only ever do one test_bit in the normal case.
2956 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2957 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2965 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2966 * anything except sleeping. This function is used to check the status of
2969 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2971 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2974 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2976 kfree(fs_info->balance_ctl);
2977 kfree(fs_info->delayed_root);
2978 kfree(fs_info->extent_root);
2979 kfree(fs_info->tree_root);
2980 kfree(fs_info->chunk_root);
2981 kfree(fs_info->dev_root);
2982 kfree(fs_info->csum_root);
2983 kfree(fs_info->quota_root);
2984 kfree(fs_info->uuid_root);
2985 kfree(fs_info->free_space_root);
2986 kfree(fs_info->super_copy);
2987 kfree(fs_info->super_for_commit);
2988 security_free_mnt_opts(&fs_info->security_opts);
2992 /* tree mod log functions from ctree.c */
2993 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2994 struct seq_list *elem);
2995 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2996 struct seq_list *elem);
2997 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3000 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3001 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3003 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3004 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3006 int btrfs_del_root(struct btrfs_trans_handle *trans,
3007 const struct btrfs_key *key);
3008 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3009 const struct btrfs_key *key,
3010 struct btrfs_root_item *item);
3011 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3012 struct btrfs_root *root,
3013 struct btrfs_key *key,
3014 struct btrfs_root_item *item);
3015 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3016 struct btrfs_path *path, struct btrfs_root_item *root_item,
3017 struct btrfs_key *root_key);
3018 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3019 void btrfs_set_root_node(struct btrfs_root_item *item,
3020 struct extent_buffer *node);
3021 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3022 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3023 struct btrfs_root *root);
3026 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3028 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3030 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3031 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3035 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3036 const char *name, int name_len);
3037 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3038 struct btrfs_root *root, const char *name,
3039 int name_len, struct btrfs_inode *dir,
3040 struct btrfs_key *location, u8 type, u64 index);
3041 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3042 struct btrfs_root *root,
3043 struct btrfs_path *path, u64 dir,
3044 const char *name, int name_len,
3046 struct btrfs_dir_item *
3047 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3048 struct btrfs_root *root,
3049 struct btrfs_path *path, u64 dir,
3050 u64 objectid, const char *name, int name_len,
3052 struct btrfs_dir_item *
3053 btrfs_search_dir_index_item(struct btrfs_root *root,
3054 struct btrfs_path *path, u64 dirid,
3055 const char *name, int name_len);
3056 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3057 struct btrfs_root *root,
3058 struct btrfs_path *path,
3059 struct btrfs_dir_item *di);
3060 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3061 struct btrfs_root *root,
3062 struct btrfs_path *path, u64 objectid,
3063 const char *name, u16 name_len,
3064 const void *data, u16 data_len);
3065 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root,
3067 struct btrfs_path *path, u64 dir,
3068 const char *name, u16 name_len,
3070 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3071 struct btrfs_path *path,
3076 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3077 struct btrfs_root *root, u64 offset);
3078 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3079 struct btrfs_root *root, u64 offset);
3080 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3083 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3084 struct btrfs_root *root,
3085 const char *name, int name_len,
3086 u64 inode_objectid, u64 ref_objectid, u64 index);
3087 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3088 struct btrfs_root *root,
3089 const char *name, int name_len,
3090 u64 inode_objectid, u64 ref_objectid, u64 *index);
3091 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3092 struct btrfs_root *root,
3093 struct btrfs_path *path, u64 objectid);
3094 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3095 *root, struct btrfs_path *path,
3096 struct btrfs_key *location, int mod);
3098 struct btrfs_inode_extref *
3099 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3100 struct btrfs_root *root,
3101 struct btrfs_path *path,
3102 const char *name, int name_len,
3103 u64 inode_objectid, u64 ref_objectid, int ins_len,
3106 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3108 int name_len, struct btrfs_inode_ref **ref_ret);
3109 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3110 u64 ref_objectid, const char *name,
3112 struct btrfs_inode_extref **extref_ret);
3115 struct btrfs_dio_private;
3116 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3117 struct btrfs_root *root, u64 bytenr, u64 len);
3118 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3119 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3120 u64 logical_offset);
3121 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3122 struct btrfs_root *root,
3123 u64 objectid, u64 pos,
3124 u64 disk_offset, u64 disk_num_bytes,
3125 u64 num_bytes, u64 offset, u64 ram_bytes,
3126 u8 compression, u8 encryption, u16 other_encoding);
3127 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3128 struct btrfs_root *root,
3129 struct btrfs_path *path, u64 objectid,
3130 u64 bytenr, int mod);
3131 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3132 struct btrfs_root *root,
3133 struct btrfs_ordered_sum *sums);
3134 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3135 u64 file_start, int contig);
3136 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3137 struct list_head *list, int search_commit);
3138 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3139 const struct btrfs_path *path,
3140 struct btrfs_file_extent_item *fi,
3141 const bool new_inline,
3142 struct extent_map *em);
3145 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3146 struct page *page, size_t pg_offset, u64 start,
3147 u64 len, int create);
3148 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3149 u64 *orig_start, u64 *orig_block_len,
3152 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3153 struct btrfs_inode *inode);
3154 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3155 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3156 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3157 struct btrfs_root *root,
3158 struct btrfs_inode *dir, struct btrfs_inode *inode,
3159 const char *name, int name_len);
3160 int btrfs_add_link(struct btrfs_trans_handle *trans,
3161 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3162 const char *name, int name_len, int add_backref, u64 index);
3163 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3164 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3166 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3167 struct btrfs_root *root,
3168 struct inode *inode, u64 new_size,
3171 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3172 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3173 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3174 unsigned int extra_bits,
3175 struct extent_state **cached_state, int dedupe);
3176 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3177 struct btrfs_root *new_root,
3178 struct btrfs_root *parent_root,
3180 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3181 size_t size, struct bio *bio,
3182 unsigned long bio_flags);
3183 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3184 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3185 int btrfs_readpage(struct file *file, struct page *page);
3186 void btrfs_evict_inode(struct inode *inode);
3187 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3188 struct inode *btrfs_alloc_inode(struct super_block *sb);
3189 void btrfs_destroy_inode(struct inode *inode);
3190 int btrfs_drop_inode(struct inode *inode);
3191 int __init btrfs_init_cachep(void);
3192 void __cold btrfs_destroy_cachep(void);
3193 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3194 struct btrfs_root *root, int *new,
3195 struct btrfs_path *path);
3196 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3197 struct btrfs_root *root, int *was_new);
3198 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3199 struct page *page, size_t pg_offset,
3200 u64 start, u64 end, int create);
3201 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3202 struct btrfs_root *root,
3203 struct inode *inode);
3204 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3205 struct btrfs_root *root, struct inode *inode);
3206 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3207 struct btrfs_inode *inode);
3208 int btrfs_orphan_cleanup(struct btrfs_root *root);
3209 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3210 void btrfs_add_delayed_iput(struct inode *inode);
3211 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3212 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3213 u64 start, u64 num_bytes, u64 min_size,
3214 loff_t actual_len, u64 *alloc_hint);
3215 int btrfs_prealloc_file_range_trans(struct inode *inode,
3216 struct btrfs_trans_handle *trans, int mode,
3217 u64 start, u64 num_bytes, u64 min_size,
3218 loff_t actual_len, u64 *alloc_hint);
3219 int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
3220 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3221 struct writeback_control *wbc);
3222 extern const struct dentry_operations btrfs_dentry_operations;
3223 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3224 void btrfs_test_inode_set_ops(struct inode *inode);
3228 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3229 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3230 int btrfs_ioctl_get_supported_features(void __user *arg);
3231 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3232 int btrfs_is_empty_uuid(u8 *uuid);
3233 int btrfs_defrag_file(struct inode *inode, struct file *file,
3234 struct btrfs_ioctl_defrag_range_args *range,
3235 u64 newer_than, unsigned long max_pages);
3236 void btrfs_get_block_group_info(struct list_head *groups_list,
3237 struct btrfs_ioctl_space_info *space);
3238 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3239 struct btrfs_ioctl_balance_args *bargs);
3240 int btrfs_dedupe_file_range(struct file *src_file, loff_t src_loff,
3241 struct file *dst_file, loff_t dst_loff,
3245 int __init btrfs_auto_defrag_init(void);
3246 void __cold btrfs_auto_defrag_exit(void);
3247 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3248 struct btrfs_inode *inode);
3249 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3250 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3251 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3252 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3254 extern const struct file_operations btrfs_file_operations;
3255 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3256 struct btrfs_root *root, struct inode *inode,
3257 struct btrfs_path *path, u64 start, u64 end,
3258 u64 *drop_end, int drop_cache,
3260 u32 extent_item_size,
3262 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3263 struct btrfs_root *root, struct inode *inode, u64 start,
3264 u64 end, int drop_cache);
3265 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3266 struct btrfs_inode *inode, u64 start, u64 end);
3267 int btrfs_release_file(struct inode *inode, struct file *file);
3268 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3269 size_t num_pages, loff_t pos, size_t write_bytes,
3270 struct extent_state **cached);
3271 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3272 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3273 struct file *file_out, loff_t pos_out, u64 len);
3276 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3277 struct btrfs_root *root);
3280 int __init btrfs_init_sysfs(void);
3281 void __cold btrfs_exit_sysfs(void);
3282 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3283 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3286 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3287 unsigned long new_flags);
3288 int btrfs_sync_fs(struct super_block *sb, int wait);
3289 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3290 u64 subvol_objectid);
3292 static inline __printf(2, 3) __cold
3293 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3297 #ifdef CONFIG_PRINTK
3300 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3302 #define btrfs_printk(fs_info, fmt, args...) \
3303 btrfs_no_printk(fs_info, fmt, ##args)
3306 #define btrfs_emerg(fs_info, fmt, args...) \
3307 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3308 #define btrfs_alert(fs_info, fmt, args...) \
3309 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3310 #define btrfs_crit(fs_info, fmt, args...) \
3311 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3312 #define btrfs_err(fs_info, fmt, args...) \
3313 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3314 #define btrfs_warn(fs_info, fmt, args...) \
3315 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3316 #define btrfs_notice(fs_info, fmt, args...) \
3317 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3318 #define btrfs_info(fs_info, fmt, args...) \
3319 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3322 * Wrappers that use printk_in_rcu
3324 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3325 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3326 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3327 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3328 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3329 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3330 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3331 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3332 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3333 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3334 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3335 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3336 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3337 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3340 * Wrappers that use a ratelimited printk_in_rcu
3342 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3343 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3344 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3345 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3346 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3347 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3348 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3349 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3350 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3351 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3352 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3353 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3354 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3355 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3358 * Wrappers that use a ratelimited printk
3360 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3361 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3362 #define btrfs_alert_rl(fs_info, fmt, args...) \
3363 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3364 #define btrfs_crit_rl(fs_info, fmt, args...) \
3365 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3366 #define btrfs_err_rl(fs_info, fmt, args...) \
3367 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3368 #define btrfs_warn_rl(fs_info, fmt, args...) \
3369 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3370 #define btrfs_notice_rl(fs_info, fmt, args...) \
3371 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3372 #define btrfs_info_rl(fs_info, fmt, args...) \
3373 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3375 #if defined(CONFIG_DYNAMIC_DEBUG)
3376 #define btrfs_debug(fs_info, fmt, args...) \
3378 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3379 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3380 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3382 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3384 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3385 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3386 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3388 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3390 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3391 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3392 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3395 #define btrfs_debug_rl(fs_info, fmt, args...) \
3397 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3398 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3399 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3402 #elif defined(DEBUG)
3403 #define btrfs_debug(fs_info, fmt, args...) \
3404 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3405 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3406 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3407 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3408 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3409 #define btrfs_debug_rl(fs_info, fmt, args...) \
3410 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3412 #define btrfs_debug(fs_info, fmt, args...) \
3413 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3414 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3415 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3416 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3417 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3418 #define btrfs_debug_rl(fs_info, fmt, args...) \
3419 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3422 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3425 btrfs_printk(fs_info, fmt, ##args); \
3426 rcu_read_unlock(); \
3429 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3432 btrfs_no_printk(fs_info, fmt, ##args); \
3433 rcu_read_unlock(); \
3436 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3438 static DEFINE_RATELIMIT_STATE(_rs, \
3439 DEFAULT_RATELIMIT_INTERVAL, \
3440 DEFAULT_RATELIMIT_BURST); \
3441 if (__ratelimit(&_rs)) \
3442 btrfs_printk(fs_info, fmt, ##args); \
3445 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3448 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3449 rcu_read_unlock(); \
3452 #ifdef CONFIG_BTRFS_ASSERT
3455 static inline void assfail(const char *expr, const char *file, int line)
3457 pr_err("assertion failed: %s, file: %s, line: %d\n",
3462 #define ASSERT(expr) \
3463 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3465 #define ASSERT(expr) ((void)0)
3469 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3472 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3477 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3478 unsigned int line, int errno, const char *fmt, ...);
3480 const char *btrfs_decode_error(int errno);
3483 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3484 const char *function,
3485 unsigned int line, int errno);
3488 * Call btrfs_abort_transaction as early as possible when an error condition is
3489 * detected, that way the exact line number is reported.
3491 #define btrfs_abort_transaction(trans, errno) \
3493 /* Report first abort since mount */ \
3494 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3495 &((trans)->fs_info->fs_state))) { \
3496 if ((errno) != -EIO) { \
3497 WARN(1, KERN_DEBUG \
3498 "BTRFS: Transaction aborted (error %d)\n", \
3501 btrfs_debug((trans)->fs_info, \
3502 "Transaction aborted (error %d)", \
3506 __btrfs_abort_transaction((trans), __func__, \
3507 __LINE__, (errno)); \
3510 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3512 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3513 (errno), fmt, ##args); \
3518 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3519 unsigned int line, int errno, const char *fmt, ...);
3521 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3522 * will panic(). Otherwise we BUG() here.
3524 #define btrfs_panic(fs_info, errno, fmt, args...) \
3526 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3531 /* compatibility and incompatibility defines */
3533 #define btrfs_set_fs_incompat(__fs_info, opt) \
3534 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3536 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3539 struct btrfs_super_block *disk_super;
3542 disk_super = fs_info->super_copy;
3543 features = btrfs_super_incompat_flags(disk_super);
3544 if (!(features & flag)) {
3545 spin_lock(&fs_info->super_lock);
3546 features = btrfs_super_incompat_flags(disk_super);
3547 if (!(features & flag)) {
3549 btrfs_set_super_incompat_flags(disk_super, features);
3550 btrfs_info(fs_info, "setting %llu feature flag",
3553 spin_unlock(&fs_info->super_lock);
3557 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3558 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3560 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3563 struct btrfs_super_block *disk_super;
3566 disk_super = fs_info->super_copy;
3567 features = btrfs_super_incompat_flags(disk_super);
3568 if (features & flag) {
3569 spin_lock(&fs_info->super_lock);
3570 features = btrfs_super_incompat_flags(disk_super);
3571 if (features & flag) {
3573 btrfs_set_super_incompat_flags(disk_super, features);
3574 btrfs_info(fs_info, "clearing %llu feature flag",
3577 spin_unlock(&fs_info->super_lock);
3581 #define btrfs_fs_incompat(fs_info, opt) \
3582 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3584 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3586 struct btrfs_super_block *disk_super;
3587 disk_super = fs_info->super_copy;
3588 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3591 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3592 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3594 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3597 struct btrfs_super_block *disk_super;
3600 disk_super = fs_info->super_copy;
3601 features = btrfs_super_compat_ro_flags(disk_super);
3602 if (!(features & flag)) {
3603 spin_lock(&fs_info->super_lock);
3604 features = btrfs_super_compat_ro_flags(disk_super);
3605 if (!(features & flag)) {
3607 btrfs_set_super_compat_ro_flags(disk_super, features);
3608 btrfs_info(fs_info, "setting %llu ro feature flag",
3611 spin_unlock(&fs_info->super_lock);
3615 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3616 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3618 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3621 struct btrfs_super_block *disk_super;
3624 disk_super = fs_info->super_copy;
3625 features = btrfs_super_compat_ro_flags(disk_super);
3626 if (features & flag) {
3627 spin_lock(&fs_info->super_lock);
3628 features = btrfs_super_compat_ro_flags(disk_super);
3629 if (features & flag) {
3631 btrfs_set_super_compat_ro_flags(disk_super, features);
3632 btrfs_info(fs_info, "clearing %llu ro feature flag",
3635 spin_unlock(&fs_info->super_lock);
3639 #define btrfs_fs_compat_ro(fs_info, opt) \
3640 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3642 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3644 struct btrfs_super_block *disk_super;
3645 disk_super = fs_info->super_copy;
3646 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3650 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3651 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3652 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3653 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3654 struct inode *inode, struct inode *dir);
3656 #define btrfs_get_acl NULL
3657 #define btrfs_set_acl NULL
3658 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3659 struct inode *inode, struct inode *dir)
3666 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3667 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3668 struct btrfs_root *root);
3669 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3670 struct btrfs_root *root);
3671 int btrfs_recover_relocation(struct btrfs_root *root);
3672 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3673 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3674 struct btrfs_root *root, struct extent_buffer *buf,
3675 struct extent_buffer *cow);
3676 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3677 u64 *bytes_to_reserve);
3678 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3679 struct btrfs_pending_snapshot *pending);
3682 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3683 u64 end, struct btrfs_scrub_progress *progress,
3684 int readonly, int is_dev_replace);
3685 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3686 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3687 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3688 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3689 struct btrfs_device *dev);
3690 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3691 struct btrfs_scrub_progress *progress);
3692 static inline void btrfs_init_full_stripe_locks_tree(
3693 struct btrfs_full_stripe_locks_tree *locks_root)
3695 locks_root->root = RB_ROOT;
3696 mutex_init(&locks_root->lock);
3700 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3701 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3702 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3704 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3706 btrfs_bio_counter_sub(fs_info, 1);
3710 struct reada_control {
3711 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3712 struct btrfs_key key_start;
3713 struct btrfs_key key_end; /* exclusive */
3716 wait_queue_head_t wait;
3718 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3719 struct btrfs_key *start, struct btrfs_key *end);
3720 int btrfs_reada_wait(void *handle);
3721 void btrfs_reada_detach(void *handle);
3722 int btree_readahead_hook(struct extent_buffer *eb, int err);
3724 static inline int is_fstree(u64 rootid)
3726 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3727 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3728 !btrfs_qgroup_level(rootid)))
3733 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3735 return signal_pending(current);
3738 /* Sanity test specific functions */
3739 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3740 void btrfs_test_destroy_inode(struct inode *inode);
3743 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3745 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3746 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3747 &fs_info->fs_state)))
3753 static inline void cond_wake_up(struct wait_queue_head *wq)
3756 * This implies a full smp_mb barrier, see comments for
3757 * waitqueue_active why.
3759 if (wq_has_sleeper(wq))
3763 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3766 * Special case for conditional wakeup where the barrier required for
3767 * waitqueue_active is implied by some of the preceding code. Eg. one
3768 * of such atomic operations (atomic_dec_and_return, ...), or a
3769 * unlock/lock sequence, etc.
3771 if (waitqueue_active(wq))