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 struct btrfs_ordered_sum;
44 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
45 #define STATIC noinline
47 #define STATIC static noinline
50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
52 #define BTRFS_MAX_MIRRORS 3
54 #define BTRFS_MAX_LEVEL 8
56 #define BTRFS_OLDEST_GENERATION 0ULL
59 * the max metadata block size. This limit is somewhat artificial,
60 * but the memmove costs go through the roof for larger blocks.
62 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
65 * we can actually store much bigger names, but lets not confuse the rest
68 #define BTRFS_NAME_LEN 255
71 * Theoretical limit is larger, but we keep this down to a sane
72 * value. That should limit greatly the possibility of collisions on
75 #define BTRFS_LINK_MAX 65535U
77 /* four bytes for CRC32 */
78 static const int btrfs_csum_sizes[] = { 4 };
80 #define BTRFS_EMPTY_DIR_SIZE 0
82 /* ioprio of readahead is set to idle */
83 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
85 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
88 * Use large batch size to reduce overhead of metadata updates. On the reader
89 * side, we only read it when we are close to ENOSPC and the read overhead is
90 * mostly related to the number of CPUs, so it is OK to use arbitrary large
93 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
95 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
99 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
101 static inline u32 count_max_extents(u64 size)
103 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
106 struct btrfs_mapping_tree {
107 struct extent_map_tree map_tree;
110 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
112 BUG_ON(num_stripes == 0);
113 return sizeof(struct btrfs_chunk) +
114 sizeof(struct btrfs_stripe) * (num_stripes - 1);
120 #define BTRFS_FS_STATE_ERROR 0
121 #define BTRFS_FS_STATE_REMOUNTING 1
122 #define BTRFS_FS_STATE_TRANS_ABORTED 2
123 #define BTRFS_FS_STATE_DEV_REPLACING 3
124 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
126 #define BTRFS_BACKREF_REV_MAX 256
127 #define BTRFS_BACKREF_REV_SHIFT 56
128 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
129 BTRFS_BACKREF_REV_SHIFT)
131 #define BTRFS_OLD_BACKREF_REV 0
132 #define BTRFS_MIXED_BACKREF_REV 1
135 * every tree block (leaf or node) starts with this header.
137 struct btrfs_header {
138 /* these first four must match the super block */
139 u8 csum[BTRFS_CSUM_SIZE];
140 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
141 __le64 bytenr; /* which block this node is supposed to live in */
144 /* allowed to be different from the super from here on down */
145 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
150 } __attribute__ ((__packed__));
153 * this is a very generous portion of the super block, giving us
154 * room to translate 14 chunks with 3 stripes each.
156 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
159 * just in case we somehow lose the roots and are not able to mount,
160 * we store an array of the roots from previous transactions
163 #define BTRFS_NUM_BACKUP_ROOTS 4
164 struct btrfs_root_backup {
166 __le64 tree_root_gen;
169 __le64 chunk_root_gen;
172 __le64 extent_root_gen;
181 __le64 csum_root_gen;
191 u8 extent_root_level;
195 /* future and to align */
197 } __attribute__ ((__packed__));
200 * the super block basically lists the main trees of the FS
201 * it currently lacks any block count etc etc
203 struct btrfs_super_block {
204 u8 csum[BTRFS_CSUM_SIZE];
205 /* the first 4 fields must match struct btrfs_header */
206 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
207 __le64 bytenr; /* this block number */
210 /* allowed to be different from the btrfs_header from here own down */
217 /* this will help find the new super based on the log root */
218 __le64 log_root_transid;
221 __le64 root_dir_objectid;
225 __le32 __unused_leafsize;
227 __le32 sys_chunk_array_size;
228 __le64 chunk_root_generation;
230 __le64 compat_ro_flags;
231 __le64 incompat_flags;
236 struct btrfs_dev_item dev_item;
238 char label[BTRFS_LABEL_SIZE];
240 __le64 cache_generation;
241 __le64 uuid_tree_generation;
243 /* future expansion */
245 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
246 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
247 } __attribute__ ((__packed__));
250 * Compat flags that we support. If any incompat flags are set other than the
251 * ones specified below then we will fail to mount
253 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
254 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
255 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
257 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
258 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
259 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
261 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
262 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
264 #define BTRFS_FEATURE_INCOMPAT_SUPP \
265 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
266 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
267 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
268 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
269 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
270 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
271 BTRFS_FEATURE_INCOMPAT_RAID56 | \
272 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
273 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
274 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
276 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
277 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
278 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
281 * A leaf is full of items. offset and size tell us where to find
282 * the item in the leaf (relative to the start of the data area)
285 struct btrfs_disk_key key;
288 } __attribute__ ((__packed__));
291 * leaves have an item area and a data area:
292 * [item0, item1....itemN] [free space] [dataN...data1, data0]
294 * The data is separate from the items to get the keys closer together
298 struct btrfs_header header;
299 struct btrfs_item items[];
300 } __attribute__ ((__packed__));
303 * all non-leaf blocks are nodes, they hold only keys and pointers to
306 struct btrfs_key_ptr {
307 struct btrfs_disk_key key;
310 } __attribute__ ((__packed__));
313 struct btrfs_header header;
314 struct btrfs_key_ptr ptrs[];
315 } __attribute__ ((__packed__));
318 * btrfs_paths remember the path taken from the root down to the leaf.
319 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
320 * to any other levels that are present.
322 * The slots array records the index of the item or block pointer
323 * used while walking the tree.
325 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
327 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
328 int slots[BTRFS_MAX_LEVEL];
329 /* if there is real range locking, this locks field will change */
330 u8 locks[BTRFS_MAX_LEVEL];
332 /* keep some upper locks as we walk down */
336 * set by btrfs_split_item, tells search_slot to keep all locks
337 * and to force calls to keep space in the nodes
339 unsigned int search_for_split:1;
340 unsigned int keep_locks:1;
341 unsigned int skip_locking:1;
342 unsigned int leave_spinning:1;
343 unsigned int search_commit_root:1;
344 unsigned int need_commit_sem:1;
345 unsigned int skip_release_on_error:1;
347 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
348 sizeof(struct btrfs_item))
349 struct btrfs_dev_replace {
350 u64 replace_state; /* see #define above */
351 time64_t time_started; /* seconds since 1-Jan-1970 */
352 time64_t time_stopped; /* seconds since 1-Jan-1970 */
353 atomic64_t num_write_errors;
354 atomic64_t num_uncorrectable_read_errors;
357 u64 committed_cursor_left;
358 u64 cursor_left_last_write_of_item;
361 u64 cont_reading_from_srcdev_mode; /* see #define above */
364 int item_needs_writeback;
365 struct btrfs_device *srcdev;
366 struct btrfs_device *tgtdev;
368 struct mutex lock_finishing_cancel_unmount;
371 atomic_t blocking_readers;
372 wait_queue_head_t read_lock_wq;
374 struct btrfs_scrub_progress scrub_progress;
377 /* For raid type sysfs entries */
378 struct raid_kobject {
381 struct list_head list;
384 struct btrfs_space_info {
387 u64 total_bytes; /* total bytes in the space,
388 this doesn't take mirrors into account */
389 u64 bytes_used; /* total bytes used,
390 this doesn't take mirrors into account */
391 u64 bytes_pinned; /* total bytes pinned, will be freed when the
392 transaction finishes */
393 u64 bytes_reserved; /* total bytes the allocator has reserved for
394 current allocations */
395 u64 bytes_may_use; /* number of bytes that may be used for
396 delalloc/allocations */
397 u64 bytes_readonly; /* total bytes that are read only */
399 u64 max_extent_size; /* This will hold the maximum extent size of
400 the space info if we had an ENOSPC in the
403 unsigned int full:1; /* indicates that we cannot allocate any more
404 chunks for this space */
405 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
407 unsigned int flush:1; /* set if we are trying to make space */
409 unsigned int force_alloc; /* set if we need to force a chunk
410 alloc for this space */
412 u64 disk_used; /* total bytes used on disk */
413 u64 disk_total; /* total bytes on disk, takes mirrors into
419 * bytes_pinned is kept in line with what is actually pinned, as in
420 * we've called update_block_group and dropped the bytes_used counter
421 * and increased the bytes_pinned counter. However this means that
422 * bytes_pinned does not reflect the bytes that will be pinned once the
423 * delayed refs are flushed, so this counter is inc'ed every time we
424 * call btrfs_free_extent so it is a realtime count of what will be
425 * freed once the transaction is committed. It will be zeroed every
426 * time the transaction commits.
428 struct percpu_counter total_bytes_pinned;
430 struct list_head list;
431 /* Protected by the spinlock 'lock'. */
432 struct list_head ro_bgs;
433 struct list_head priority_tickets;
434 struct list_head tickets;
436 * tickets_id just indicates the next ticket will be handled, so note
437 * it's not stored per ticket.
441 struct rw_semaphore groups_sem;
442 /* for block groups in our same type */
443 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
444 wait_queue_head_t wait;
447 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
450 #define BTRFS_BLOCK_RSV_GLOBAL 1
451 #define BTRFS_BLOCK_RSV_DELALLOC 2
452 #define BTRFS_BLOCK_RSV_TRANS 3
453 #define BTRFS_BLOCK_RSV_CHUNK 4
454 #define BTRFS_BLOCK_RSV_DELOPS 5
455 #define BTRFS_BLOCK_RSV_EMPTY 6
456 #define BTRFS_BLOCK_RSV_TEMP 7
458 struct btrfs_block_rsv {
461 struct btrfs_space_info *space_info;
465 unsigned short failfast;
468 * Qgroup equivalent for @size @reserved
470 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
471 * about things like csum size nor how many tree blocks it will need to
474 * Qgroup cares more about net change of the extent usage.
476 * So for one newly inserted file extent, in worst case it will cause
477 * leaf split and level increase, nodesize for each file extent is
480 * In short, qgroup_size/reserved is the upper limit of possible needed
481 * qgroup metadata reservation.
484 u64 qgroup_rsv_reserved;
488 * free clusters are used to claim free space in relatively large chunks,
489 * allowing us to do less seeky writes. They are used for all metadata
490 * allocations. In ssd_spread mode they are also used for data allocations.
492 struct btrfs_free_cluster {
494 spinlock_t refill_lock;
497 /* largest extent in this cluster */
500 /* first extent starting offset */
503 /* We did a full search and couldn't create a cluster */
506 struct btrfs_block_group_cache *block_group;
508 * when a cluster is allocated from a block group, we put the
509 * cluster onto a list in the block group so that it can
510 * be freed before the block group is freed.
512 struct list_head block_group_list;
515 enum btrfs_caching_type {
517 BTRFS_CACHE_STARTED = 1,
518 BTRFS_CACHE_FAST = 2,
519 BTRFS_CACHE_FINISHED = 3,
520 BTRFS_CACHE_ERROR = 4,
523 enum btrfs_disk_cache_state {
524 BTRFS_DC_WRITTEN = 0,
530 struct btrfs_caching_control {
531 struct list_head list;
533 wait_queue_head_t wait;
534 struct btrfs_work work;
535 struct btrfs_block_group_cache *block_group;
540 /* Once caching_thread() finds this much free space, it will wake up waiters. */
541 #define CACHING_CTL_WAKE_UP SZ_2M
543 struct btrfs_io_ctl {
547 struct btrfs_fs_info *fs_info;
554 unsigned check_crcs:1;
558 * Tree to record all locked full stripes of a RAID5/6 block group
560 struct btrfs_full_stripe_locks_tree {
565 struct btrfs_block_group_cache {
566 struct btrfs_key key;
567 struct btrfs_block_group_item item;
568 struct btrfs_fs_info *fs_info;
576 u64 cache_generation;
579 * If the free space extent count exceeds this number, convert the block
582 u32 bitmap_high_thresh;
585 * If the free space extent count drops below this number, convert the
586 * block group back to extents.
588 u32 bitmap_low_thresh;
591 * It is just used for the delayed data space allocation because
592 * only the data space allocation and the relative metadata update
593 * can be done cross the transaction.
595 struct rw_semaphore data_rwsem;
597 /* for raid56, this is a full stripe, without parity */
598 unsigned long full_stripe_len;
602 unsigned int has_caching_ctl:1;
603 unsigned int removed:1;
605 int disk_cache_state;
607 /* cache tracking stuff */
609 struct btrfs_caching_control *caching_ctl;
610 u64 last_byte_to_unpin;
612 struct btrfs_space_info *space_info;
614 /* free space cache stuff */
615 struct btrfs_free_space_ctl *free_space_ctl;
617 /* block group cache stuff */
618 struct rb_node cache_node;
620 /* for block groups in the same raid type */
621 struct list_head list;
626 /* List of struct btrfs_free_clusters for this block group.
627 * Today it will only have one thing on it, but that may change
629 struct list_head cluster_list;
631 /* For delayed block group creation or deletion of empty block groups */
632 struct list_head bg_list;
634 /* For read-only block groups */
635 struct list_head ro_list;
639 /* For dirty block groups */
640 struct list_head dirty_list;
641 struct list_head io_list;
643 struct btrfs_io_ctl io_ctl;
646 * Incremented when doing extent allocations and holding a read lock
647 * on the space_info's groups_sem semaphore.
648 * Decremented when an ordered extent that represents an IO against this
649 * block group's range is created (after it's added to its inode's
650 * root's list of ordered extents) or immediately after the allocation
651 * if it's a metadata extent or fallocate extent (for these cases we
652 * don't create ordered extents).
654 atomic_t reservations;
657 * Incremented while holding the spinlock *lock* by a task checking if
658 * it can perform a nocow write (incremented if the value for the *ro*
659 * field is 0). Decremented by such tasks once they create an ordered
660 * extent or before that if some error happens before reaching that step.
661 * This is to prevent races between block group relocation and nocow
662 * writes through direct IO.
664 atomic_t nocow_writers;
666 /* Lock for free space tree operations. */
667 struct mutex free_space_lock;
670 * Does the block group need to be added to the free space tree?
671 * Protected by free_space_lock.
673 int needs_free_space;
675 /* Record locked full stripes for RAID5/6 block group */
676 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
679 /* delayed seq elem */
681 struct list_head list;
685 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
687 #define SEQ_LAST ((u64)-1)
689 enum btrfs_orphan_cleanup_state {
690 ORPHAN_CLEANUP_STARTED = 1,
691 ORPHAN_CLEANUP_DONE = 2,
694 /* used by the raid56 code to lock stripes for read/modify/write */
695 struct btrfs_stripe_hash {
696 struct list_head hash_list;
700 /* used by the raid56 code to lock stripes for read/modify/write */
701 struct btrfs_stripe_hash_table {
702 struct list_head stripe_cache;
703 spinlock_t cache_lock;
705 struct btrfs_stripe_hash table[];
708 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
710 void btrfs_init_async_reclaim_work(struct work_struct *work);
713 struct reloc_control;
715 struct btrfs_fs_devices;
716 struct btrfs_balance_control;
717 struct btrfs_delayed_root;
719 #define BTRFS_FS_BARRIER 1
720 #define BTRFS_FS_CLOSING_START 2
721 #define BTRFS_FS_CLOSING_DONE 3
722 #define BTRFS_FS_LOG_RECOVERING 4
723 #define BTRFS_FS_OPEN 5
724 #define BTRFS_FS_QUOTA_ENABLED 6
725 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
726 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
727 #define BTRFS_FS_BTREE_ERR 11
728 #define BTRFS_FS_LOG1_ERR 12
729 #define BTRFS_FS_LOG2_ERR 13
730 #define BTRFS_FS_QUOTA_OVERRIDE 14
731 /* Used to record internally whether fs has been frozen */
732 #define BTRFS_FS_FROZEN 15
735 * Indicate that a whole-filesystem exclusive operation is running
736 * (device replace, resize, device add/delete, balance)
738 #define BTRFS_FS_EXCL_OP 16
741 * To info transaction_kthread we need an immediate commit so it doesn't
742 * need to wait for commit_interval
744 #define BTRFS_FS_NEED_ASYNC_COMMIT 17
747 * Indicate that balance has been set up from the ioctl and is in the main
748 * phase. The fs_info::balance_ctl is initialized.
750 #define BTRFS_FS_BALANCE_RUNNING 18
752 struct btrfs_fs_info {
753 u8 fsid[BTRFS_FSID_SIZE];
754 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
756 struct btrfs_root *extent_root;
757 struct btrfs_root *tree_root;
758 struct btrfs_root *chunk_root;
759 struct btrfs_root *dev_root;
760 struct btrfs_root *fs_root;
761 struct btrfs_root *csum_root;
762 struct btrfs_root *quota_root;
763 struct btrfs_root *uuid_root;
764 struct btrfs_root *free_space_root;
766 /* the log root tree is a directory of all the other log roots */
767 struct btrfs_root *log_root_tree;
769 spinlock_t fs_roots_radix_lock;
770 struct radix_tree_root fs_roots_radix;
772 /* block group cache stuff */
773 spinlock_t block_group_cache_lock;
774 u64 first_logical_byte;
775 struct rb_root block_group_cache_tree;
777 /* keep track of unallocated space */
778 atomic64_t free_chunk_space;
780 struct extent_io_tree freed_extents[2];
781 struct extent_io_tree *pinned_extents;
783 /* logical->physical extent mapping */
784 struct btrfs_mapping_tree mapping_tree;
787 * block reservation for extent, checksum, root tree and
788 * delayed dir index item
790 struct btrfs_block_rsv global_block_rsv;
791 /* block reservation for metadata operations */
792 struct btrfs_block_rsv trans_block_rsv;
793 /* block reservation for chunk tree */
794 struct btrfs_block_rsv chunk_block_rsv;
795 /* block reservation for delayed operations */
796 struct btrfs_block_rsv delayed_block_rsv;
798 struct btrfs_block_rsv empty_block_rsv;
801 u64 last_trans_committed;
802 u64 avg_delayed_ref_runtime;
805 * this is updated to the current trans every time a full commit
806 * is required instead of the faster short fsync log commits
808 u64 last_trans_log_full_commit;
809 unsigned long mount_opt;
811 * Track requests for actions that need to be done during transaction
812 * commit (like for some mount options).
814 unsigned long pending_changes;
815 unsigned long compress_type:4;
816 unsigned int compress_level;
819 * It is a suggestive number, the read side is safe even it gets a
820 * wrong number because we will write out the data into a regular
821 * extent. The write side(mount/remount) is under ->s_umount lock,
822 * so it is also safe.
826 struct btrfs_transaction *running_transaction;
827 wait_queue_head_t transaction_throttle;
828 wait_queue_head_t transaction_wait;
829 wait_queue_head_t transaction_blocked_wait;
830 wait_queue_head_t async_submit_wait;
833 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
834 * when they are updated.
836 * Because we do not clear the flags for ever, so we needn't use
837 * the lock on the read side.
839 * We also needn't use the lock when we mount the fs, because
840 * there is no other task which will update the flag.
842 spinlock_t super_lock;
843 struct btrfs_super_block *super_copy;
844 struct btrfs_super_block *super_for_commit;
845 struct super_block *sb;
846 struct inode *btree_inode;
847 struct mutex tree_log_mutex;
848 struct mutex transaction_kthread_mutex;
849 struct mutex cleaner_mutex;
850 struct mutex chunk_mutex;
853 * this is taken to make sure we don't set block groups ro after
854 * the free space cache has been allocated on them
856 struct mutex ro_block_group_mutex;
858 /* this is used during read/modify/write to make sure
859 * no two ios are trying to mod the same stripe at the same
862 struct btrfs_stripe_hash_table *stripe_hash_table;
865 * this protects the ordered operations list only while we are
866 * processing all of the entries on it. This way we make
867 * sure the commit code doesn't find the list temporarily empty
868 * because another function happens to be doing non-waiting preflush
869 * before jumping into the main commit.
871 struct mutex ordered_operations_mutex;
873 struct rw_semaphore commit_root_sem;
875 struct rw_semaphore cleanup_work_sem;
877 struct rw_semaphore subvol_sem;
878 struct srcu_struct subvol_srcu;
880 spinlock_t trans_lock;
882 * the reloc mutex goes with the trans lock, it is taken
883 * during commit to protect us from the relocation code
885 struct mutex reloc_mutex;
887 struct list_head trans_list;
888 struct list_head dead_roots;
889 struct list_head caching_block_groups;
891 spinlock_t delayed_iput_lock;
892 struct list_head delayed_iputs;
893 struct mutex cleaner_delayed_iput_mutex;
895 /* this protects tree_mod_seq_list */
896 spinlock_t tree_mod_seq_lock;
897 atomic64_t tree_mod_seq;
898 struct list_head tree_mod_seq_list;
900 /* this protects tree_mod_log */
901 rwlock_t tree_mod_log_lock;
902 struct rb_root tree_mod_log;
904 atomic_t async_delalloc_pages;
907 * this is used to protect the following list -- ordered_roots.
909 spinlock_t ordered_root_lock;
912 * all fs/file tree roots in which there are data=ordered extents
913 * pending writeback are added into this list.
915 * these can span multiple transactions and basically include
916 * every dirty data page that isn't from nodatacow
918 struct list_head ordered_roots;
920 struct mutex delalloc_root_mutex;
921 spinlock_t delalloc_root_lock;
922 /* all fs/file tree roots that have delalloc inodes. */
923 struct list_head delalloc_roots;
926 * there is a pool of worker threads for checksumming during writes
927 * and a pool for checksumming after reads. This is because readers
928 * can run with FS locks held, and the writers may be waiting for
929 * those locks. We don't want ordering in the pending list to cause
930 * deadlocks, and so the two are serviced separately.
932 * A third pool does submit_bio to avoid deadlocking with the other
935 struct btrfs_workqueue *workers;
936 struct btrfs_workqueue *delalloc_workers;
937 struct btrfs_workqueue *flush_workers;
938 struct btrfs_workqueue *endio_workers;
939 struct btrfs_workqueue *endio_meta_workers;
940 struct btrfs_workqueue *endio_raid56_workers;
941 struct btrfs_workqueue *endio_repair_workers;
942 struct btrfs_workqueue *rmw_workers;
943 struct btrfs_workqueue *endio_meta_write_workers;
944 struct btrfs_workqueue *endio_write_workers;
945 struct btrfs_workqueue *endio_freespace_worker;
946 struct btrfs_workqueue *submit_workers;
947 struct btrfs_workqueue *caching_workers;
948 struct btrfs_workqueue *readahead_workers;
951 * fixup workers take dirty pages that didn't properly go through
952 * the cow mechanism and make them safe to write. It happens
953 * for the sys_munmap function call path
955 struct btrfs_workqueue *fixup_workers;
956 struct btrfs_workqueue *delayed_workers;
958 /* the extent workers do delayed refs on the extent allocation tree */
959 struct btrfs_workqueue *extent_workers;
960 struct task_struct *transaction_kthread;
961 struct task_struct *cleaner_kthread;
962 u32 thread_pool_size;
964 struct kobject *space_info_kobj;
965 struct list_head pending_raid_kobjs;
966 spinlock_t pending_raid_kobjs_lock; /* uncontended */
970 /* used to keep from writing metadata until there is a nice batch */
971 struct percpu_counter dirty_metadata_bytes;
972 struct percpu_counter delalloc_bytes;
973 s32 dirty_metadata_batch;
976 struct list_head dirty_cowonly_roots;
978 struct btrfs_fs_devices *fs_devices;
981 * The space_info list is effectively read only after initial
982 * setup. It is populated at mount time and cleaned up after
983 * all block groups are removed. RCU is used to protect it.
985 struct list_head space_info;
987 struct btrfs_space_info *data_sinfo;
989 struct reloc_control *reloc_ctl;
991 /* data_alloc_cluster is only used in ssd_spread mode */
992 struct btrfs_free_cluster data_alloc_cluster;
994 /* all metadata allocations go through this cluster */
995 struct btrfs_free_cluster meta_alloc_cluster;
997 /* auto defrag inodes go here */
998 spinlock_t defrag_inodes_lock;
999 struct rb_root defrag_inodes;
1000 atomic_t defrag_running;
1002 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1003 seqlock_t profiles_lock;
1005 * these three are in extended format (availability of single
1006 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1007 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1009 u64 avail_data_alloc_bits;
1010 u64 avail_metadata_alloc_bits;
1011 u64 avail_system_alloc_bits;
1013 /* restriper state */
1014 spinlock_t balance_lock;
1015 struct mutex balance_mutex;
1016 atomic_t balance_pause_req;
1017 atomic_t balance_cancel_req;
1018 struct btrfs_balance_control *balance_ctl;
1019 wait_queue_head_t balance_wait_q;
1021 u32 data_chunk_allocations;
1026 /* private scrub information */
1027 struct mutex scrub_lock;
1028 atomic_t scrubs_running;
1029 atomic_t scrub_pause_req;
1030 atomic_t scrubs_paused;
1031 atomic_t scrub_cancel_req;
1032 wait_queue_head_t scrub_pause_wait;
1033 int scrub_workers_refcnt;
1034 struct btrfs_workqueue *scrub_workers;
1035 struct btrfs_workqueue *scrub_wr_completion_workers;
1036 struct btrfs_workqueue *scrub_nocow_workers;
1037 struct btrfs_workqueue *scrub_parity_workers;
1039 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1040 u32 check_integrity_print_mask;
1042 /* is qgroup tracking in a consistent state? */
1045 /* holds configuration and tracking. Protected by qgroup_lock */
1046 struct rb_root qgroup_tree;
1047 struct rb_root qgroup_op_tree;
1048 spinlock_t qgroup_lock;
1049 spinlock_t qgroup_op_lock;
1050 atomic_t qgroup_op_seq;
1053 * used to avoid frequently calling ulist_alloc()/ulist_free()
1054 * when doing qgroup accounting, it must be protected by qgroup_lock.
1056 struct ulist *qgroup_ulist;
1058 /* protect user change for quota operations */
1059 struct mutex qgroup_ioctl_lock;
1061 /* list of dirty qgroups to be written at next commit */
1062 struct list_head dirty_qgroups;
1064 /* used by qgroup for an efficient tree traversal */
1067 /* qgroup rescan items */
1068 struct mutex qgroup_rescan_lock; /* protects the progress item */
1069 struct btrfs_key qgroup_rescan_progress;
1070 struct btrfs_workqueue *qgroup_rescan_workers;
1071 struct completion qgroup_rescan_completion;
1072 struct btrfs_work qgroup_rescan_work;
1073 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1075 /* filesystem state */
1076 unsigned long fs_state;
1078 struct btrfs_delayed_root *delayed_root;
1080 /* readahead tree */
1081 spinlock_t reada_lock;
1082 struct radix_tree_root reada_tree;
1084 /* readahead works cnt */
1085 atomic_t reada_works_cnt;
1087 /* Extent buffer radix tree */
1088 spinlock_t buffer_lock;
1089 struct radix_tree_root buffer_radix;
1091 /* next backup root to be overwritten */
1092 int backup_root_index;
1094 /* device replace state */
1095 struct btrfs_dev_replace dev_replace;
1097 struct percpu_counter bio_counter;
1098 wait_queue_head_t replace_wait;
1100 struct semaphore uuid_tree_rescan_sem;
1102 /* Used to reclaim the metadata space in the background. */
1103 struct work_struct async_reclaim_work;
1105 spinlock_t unused_bgs_lock;
1106 struct list_head unused_bgs;
1107 struct mutex unused_bg_unpin_mutex;
1108 struct mutex delete_unused_bgs_mutex;
1110 /* For btrfs to record security options */
1111 struct security_mnt_opts security_opts;
1114 * Chunks that can't be freed yet (under a trim/discard operation)
1115 * and will be latter freed. Protected by fs_info->chunk_mutex.
1117 struct list_head pinned_chunks;
1119 /* Cached block sizes */
1124 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1125 spinlock_t ref_verify_lock;
1126 struct rb_root block_tree;
1130 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1132 return sb->s_fs_info;
1135 struct btrfs_subvolume_writers {
1136 struct percpu_counter counter;
1137 wait_queue_head_t wait;
1141 * The state of btrfs root
1144 * btrfs_record_root_in_trans is a multi-step process,
1145 * and it can race with the balancing code. But the
1146 * race is very small, and only the first time the root
1147 * is added to each transaction. So IN_TRANS_SETUP
1148 * is used to tell us when more checks are required
1150 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1151 #define BTRFS_ROOT_REF_COWS 1
1152 #define BTRFS_ROOT_TRACK_DIRTY 2
1153 #define BTRFS_ROOT_IN_RADIX 3
1154 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1155 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1156 #define BTRFS_ROOT_FORCE_COW 6
1157 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1158 #define BTRFS_ROOT_DIRTY 8
1161 * in ram representation of the tree. extent_root is used for all allocations
1162 * and for the extent tree extent_root root.
1165 struct extent_buffer *node;
1167 struct extent_buffer *commit_root;
1168 struct btrfs_root *log_root;
1169 struct btrfs_root *reloc_root;
1171 unsigned long state;
1172 struct btrfs_root_item root_item;
1173 struct btrfs_key root_key;
1174 struct btrfs_fs_info *fs_info;
1175 struct extent_io_tree dirty_log_pages;
1177 struct mutex objectid_mutex;
1179 spinlock_t accounting_lock;
1180 struct btrfs_block_rsv *block_rsv;
1182 /* free ino cache stuff */
1183 struct btrfs_free_space_ctl *free_ino_ctl;
1184 enum btrfs_caching_type ino_cache_state;
1185 spinlock_t ino_cache_lock;
1186 wait_queue_head_t ino_cache_wait;
1187 struct btrfs_free_space_ctl *free_ino_pinned;
1188 u64 ino_cache_progress;
1189 struct inode *ino_cache_inode;
1191 struct mutex log_mutex;
1192 wait_queue_head_t log_writer_wait;
1193 wait_queue_head_t log_commit_wait[2];
1194 struct list_head log_ctxs[2];
1195 atomic_t log_writers;
1196 atomic_t log_commit[2];
1199 /* No matter the commit succeeds or not*/
1200 int log_transid_committed;
1201 /* Just be updated when the commit succeeds. */
1202 int last_log_commit;
1203 pid_t log_start_pid;
1210 u64 highest_objectid;
1212 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1213 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1217 u64 defrag_trans_start;
1218 struct btrfs_key defrag_progress;
1219 struct btrfs_key defrag_max;
1221 /* the dirty list is only used by non-reference counted roots */
1222 struct list_head dirty_list;
1224 struct list_head root_list;
1226 spinlock_t log_extents_lock[2];
1227 struct list_head logged_list[2];
1229 int orphan_cleanup_state;
1231 spinlock_t inode_lock;
1232 /* red-black tree that keeps track of in-memory inodes */
1233 struct rb_root inode_tree;
1236 * radix tree that keeps track of delayed nodes of every inode,
1237 * protected by inode_lock
1239 struct radix_tree_root delayed_nodes_tree;
1241 * right now this just gets used so that a root has its own devid
1242 * for stat. It may be used for more later
1246 spinlock_t root_item_lock;
1249 struct mutex delalloc_mutex;
1250 spinlock_t delalloc_lock;
1252 * all of the inodes that have delalloc bytes. It is possible for
1253 * this list to be empty even when there is still dirty data=ordered
1254 * extents waiting to finish IO.
1256 struct list_head delalloc_inodes;
1257 struct list_head delalloc_root;
1258 u64 nr_delalloc_inodes;
1260 struct mutex ordered_extent_mutex;
1262 * this is used by the balancing code to wait for all the pending
1265 spinlock_t ordered_extent_lock;
1268 * all of the data=ordered extents pending writeback
1269 * these can span multiple transactions and basically include
1270 * every dirty data page that isn't from nodatacow
1272 struct list_head ordered_extents;
1273 struct list_head ordered_root;
1274 u64 nr_ordered_extents;
1277 * Number of currently running SEND ioctls to prevent
1278 * manipulation with the read-only status via SUBVOL_SETFLAGS
1280 int send_in_progress;
1281 struct btrfs_subvolume_writers *subv_writers;
1282 atomic_t will_be_snapshotted;
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 struct btrfs_map_token {
1463 const struct extent_buffer *eb;
1465 unsigned long offset;
1468 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1469 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1471 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1473 token->kaddr = NULL;
1476 /* some macros to generate set/get functions for the struct fields. This
1477 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1480 #define le8_to_cpu(v) (v)
1481 #define cpu_to_le8(v) (v)
1484 #define read_eb_member(eb, ptr, type, member, result) (\
1485 read_extent_buffer(eb, (char *)(result), \
1486 ((unsigned long)(ptr)) + \
1487 offsetof(type, member), \
1488 sizeof(((type *)0)->member)))
1490 #define write_eb_member(eb, ptr, type, member, result) (\
1491 write_extent_buffer(eb, (char *)(result), \
1492 ((unsigned long)(ptr)) + \
1493 offsetof(type, member), \
1494 sizeof(((type *)0)->member)))
1496 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1497 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1498 const void *ptr, unsigned long off, \
1499 struct btrfs_map_token *token); \
1500 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1501 unsigned long off, u##bits val, \
1502 struct btrfs_map_token *token); \
1503 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1505 unsigned long off) \
1507 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1509 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1510 unsigned long off, u##bits val) \
1512 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1515 DECLARE_BTRFS_SETGET_BITS(8)
1516 DECLARE_BTRFS_SETGET_BITS(16)
1517 DECLARE_BTRFS_SETGET_BITS(32)
1518 DECLARE_BTRFS_SETGET_BITS(64)
1520 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1521 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1524 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1525 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1527 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1530 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1531 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1533 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1535 struct btrfs_map_token *token) \
1537 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1538 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1540 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1541 type *s, u##bits val, \
1542 struct btrfs_map_token *token) \
1544 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1545 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1548 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1549 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1551 const type *p = page_address(eb->pages[0]); \
1552 u##bits res = le##bits##_to_cpu(p->member); \
1555 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1558 type *p = page_address(eb->pages[0]); \
1559 p->member = cpu_to_le##bits(val); \
1562 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1563 static inline u##bits btrfs_##name(const type *s) \
1565 return le##bits##_to_cpu(s->member); \
1567 static inline void btrfs_set_##name(type *s, u##bits val) \
1569 s->member = cpu_to_le##bits(val); \
1573 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1574 struct btrfs_dev_item *s)
1576 BUILD_BUG_ON(sizeof(u64) !=
1577 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1578 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1581 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1582 struct btrfs_dev_item *s,
1585 BUILD_BUG_ON(sizeof(u64) !=
1586 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1587 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1588 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1592 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1593 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1594 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1595 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1596 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1598 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1599 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1600 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1601 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1602 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1603 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1605 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1606 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1608 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1610 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1612 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1614 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1616 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1617 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1619 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1621 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1623 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1626 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1628 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1631 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1633 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1636 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1637 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1638 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1639 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1640 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1641 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1642 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1643 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1644 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1645 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1646 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1648 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1650 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1654 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1659 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1661 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1668 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1669 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1671 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1674 unsigned long offset = (unsigned long)c;
1675 offset += offsetof(struct btrfs_chunk, stripe);
1676 offset += nr * sizeof(struct btrfs_stripe);
1677 return (struct btrfs_stripe *)offset;
1680 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1682 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1685 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1686 struct btrfs_chunk *c, int nr)
1688 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1691 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1692 struct btrfs_chunk *c, int nr)
1694 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1697 /* struct btrfs_block_group_item */
1698 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1700 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1702 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1703 struct btrfs_block_group_item, chunk_objectid, 64);
1705 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1706 struct btrfs_block_group_item, chunk_objectid, 64);
1707 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1708 struct btrfs_block_group_item, flags, 64);
1709 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1710 struct btrfs_block_group_item, flags, 64);
1712 /* struct btrfs_free_space_info */
1713 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1715 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1717 /* struct btrfs_inode_ref */
1718 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1719 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1721 /* struct btrfs_inode_extref */
1722 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1723 parent_objectid, 64);
1724 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1726 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1728 /* struct btrfs_inode_item */
1729 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1730 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1731 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1732 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1733 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1734 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1735 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1736 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1737 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1738 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1739 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1740 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1741 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1743 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1754 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1758 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1759 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1760 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1761 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1763 /* struct btrfs_dev_extent */
1764 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1766 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1767 chunk_objectid, 64);
1768 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1770 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1772 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1774 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1775 return (unsigned long)dev + ptr;
1778 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1779 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1781 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1783 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1786 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1788 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1789 struct btrfs_tree_block_info *item,
1790 struct btrfs_disk_key *key)
1792 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1795 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1796 struct btrfs_tree_block_info *item,
1797 struct btrfs_disk_key *key)
1799 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1802 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1804 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1806 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1808 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1811 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1814 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1816 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1819 static inline u32 btrfs_extent_inline_ref_size(int type)
1821 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1822 type == BTRFS_SHARED_BLOCK_REF_KEY)
1823 return sizeof(struct btrfs_extent_inline_ref);
1824 if (type == BTRFS_SHARED_DATA_REF_KEY)
1825 return sizeof(struct btrfs_shared_data_ref) +
1826 sizeof(struct btrfs_extent_inline_ref);
1827 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1828 return sizeof(struct btrfs_extent_data_ref) +
1829 offsetof(struct btrfs_extent_inline_ref, offset);
1833 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1834 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1836 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1837 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1839 /* struct btrfs_node */
1840 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1841 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1842 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1844 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1847 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1850 ptr = offsetof(struct btrfs_node, ptrs) +
1851 sizeof(struct btrfs_key_ptr) * nr;
1852 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1855 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1859 ptr = offsetof(struct btrfs_node, ptrs) +
1860 sizeof(struct btrfs_key_ptr) * nr;
1861 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1864 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1867 ptr = offsetof(struct btrfs_node, ptrs) +
1868 sizeof(struct btrfs_key_ptr) * nr;
1869 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1872 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1876 ptr = offsetof(struct btrfs_node, ptrs) +
1877 sizeof(struct btrfs_key_ptr) * nr;
1878 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1881 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1883 return offsetof(struct btrfs_node, ptrs) +
1884 sizeof(struct btrfs_key_ptr) * nr;
1887 void btrfs_node_key(const struct extent_buffer *eb,
1888 struct btrfs_disk_key *disk_key, int nr);
1890 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1891 struct btrfs_disk_key *disk_key, int nr)
1894 ptr = btrfs_node_key_ptr_offset(nr);
1895 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1896 struct btrfs_key_ptr, key, disk_key);
1899 /* struct btrfs_item */
1900 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1901 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1902 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1903 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1905 static inline unsigned long btrfs_item_nr_offset(int nr)
1907 return offsetof(struct btrfs_leaf, items) +
1908 sizeof(struct btrfs_item) * nr;
1911 static inline struct btrfs_item *btrfs_item_nr(int nr)
1913 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1916 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1917 struct btrfs_item *item)
1919 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1922 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1924 return btrfs_item_end(eb, btrfs_item_nr(nr));
1927 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1929 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1932 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1934 return btrfs_item_size(eb, btrfs_item_nr(nr));
1937 static inline void btrfs_item_key(const struct extent_buffer *eb,
1938 struct btrfs_disk_key *disk_key, int nr)
1940 struct btrfs_item *item = btrfs_item_nr(nr);
1941 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1944 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1945 struct btrfs_disk_key *disk_key, int nr)
1947 struct btrfs_item *item = btrfs_item_nr(nr);
1948 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1951 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1954 * struct btrfs_root_ref
1956 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1957 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1958 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1960 /* struct btrfs_dir_item */
1961 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1962 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1963 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1964 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1965 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1966 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1968 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1970 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1973 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1974 const struct btrfs_dir_item *item,
1975 struct btrfs_disk_key *key)
1977 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1980 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1981 struct btrfs_dir_item *item,
1982 const struct btrfs_disk_key *key)
1984 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1987 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1989 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1991 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1994 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1995 const struct btrfs_free_space_header *h,
1996 struct btrfs_disk_key *key)
1998 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2001 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2002 struct btrfs_free_space_header *h,
2003 const struct btrfs_disk_key *key)
2005 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2008 /* struct btrfs_disk_key */
2009 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2011 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2012 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2014 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2015 const struct btrfs_disk_key *disk)
2017 cpu->offset = le64_to_cpu(disk->offset);
2018 cpu->type = disk->type;
2019 cpu->objectid = le64_to_cpu(disk->objectid);
2022 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2023 const struct btrfs_key *cpu)
2025 disk->offset = cpu_to_le64(cpu->offset);
2026 disk->type = cpu->type;
2027 disk->objectid = cpu_to_le64(cpu->objectid);
2030 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2031 struct btrfs_key *key, int nr)
2033 struct btrfs_disk_key disk_key;
2034 btrfs_node_key(eb, &disk_key, nr);
2035 btrfs_disk_key_to_cpu(key, &disk_key);
2038 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2039 struct btrfs_key *key, int nr)
2041 struct btrfs_disk_key disk_key;
2042 btrfs_item_key(eb, &disk_key, nr);
2043 btrfs_disk_key_to_cpu(key, &disk_key);
2046 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2047 const struct btrfs_dir_item *item,
2048 struct btrfs_key *key)
2050 struct btrfs_disk_key disk_key;
2051 btrfs_dir_item_key(eb, item, &disk_key);
2052 btrfs_disk_key_to_cpu(key, &disk_key);
2055 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2060 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2065 /* struct btrfs_header */
2066 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2067 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2069 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2070 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2071 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2072 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2073 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2075 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2076 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2078 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2080 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2082 return (btrfs_header_flags(eb) & flag) == flag;
2085 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2087 u64 flags = btrfs_header_flags(eb);
2088 btrfs_set_header_flags(eb, flags | flag);
2089 return (flags & flag) == flag;
2092 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2094 u64 flags = btrfs_header_flags(eb);
2095 btrfs_set_header_flags(eb, flags & ~flag);
2096 return (flags & flag) == flag;
2099 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2101 u64 flags = btrfs_header_flags(eb);
2102 return flags >> BTRFS_BACKREF_REV_SHIFT;
2105 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2108 u64 flags = btrfs_header_flags(eb);
2109 flags &= ~BTRFS_BACKREF_REV_MASK;
2110 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2111 btrfs_set_header_flags(eb, flags);
2114 static inline unsigned long btrfs_header_fsid(void)
2116 return offsetof(struct btrfs_header, fsid);
2119 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2121 return offsetof(struct btrfs_header, chunk_tree_uuid);
2124 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2126 return btrfs_header_level(eb) == 0;
2129 /* struct btrfs_root_item */
2130 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2132 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2133 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2134 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2136 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2138 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2139 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2140 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2141 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2142 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2143 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2144 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2145 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2147 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2149 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2151 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2153 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2155 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2158 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2160 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2163 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2165 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2168 /* struct btrfs_root_backup */
2169 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2171 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2173 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2174 tree_root_level, 8);
2176 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2178 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2179 chunk_root_gen, 64);
2180 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2181 chunk_root_level, 8);
2183 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2185 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2186 extent_root_gen, 64);
2187 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2188 extent_root_level, 8);
2190 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2192 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2194 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2197 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2199 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2201 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2204 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2206 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2208 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2209 csum_root_level, 8);
2210 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2212 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2214 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2217 /* struct btrfs_balance_item */
2218 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2220 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2221 const struct btrfs_balance_item *bi,
2222 struct btrfs_disk_balance_args *ba)
2224 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2227 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2228 struct btrfs_balance_item *bi,
2229 const struct btrfs_disk_balance_args *ba)
2231 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2234 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2235 const struct btrfs_balance_item *bi,
2236 struct btrfs_disk_balance_args *ba)
2238 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2241 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2242 struct btrfs_balance_item *bi,
2243 const struct btrfs_disk_balance_args *ba)
2245 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2248 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2249 const struct btrfs_balance_item *bi,
2250 struct btrfs_disk_balance_args *ba)
2252 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2255 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2256 struct btrfs_balance_item *bi,
2257 const struct btrfs_disk_balance_args *ba)
2259 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2263 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2264 const struct btrfs_disk_balance_args *disk)
2266 memset(cpu, 0, sizeof(*cpu));
2268 cpu->profiles = le64_to_cpu(disk->profiles);
2269 cpu->usage = le64_to_cpu(disk->usage);
2270 cpu->devid = le64_to_cpu(disk->devid);
2271 cpu->pstart = le64_to_cpu(disk->pstart);
2272 cpu->pend = le64_to_cpu(disk->pend);
2273 cpu->vstart = le64_to_cpu(disk->vstart);
2274 cpu->vend = le64_to_cpu(disk->vend);
2275 cpu->target = le64_to_cpu(disk->target);
2276 cpu->flags = le64_to_cpu(disk->flags);
2277 cpu->limit = le64_to_cpu(disk->limit);
2278 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2279 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2283 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2284 const struct btrfs_balance_args *cpu)
2286 memset(disk, 0, sizeof(*disk));
2288 disk->profiles = cpu_to_le64(cpu->profiles);
2289 disk->usage = cpu_to_le64(cpu->usage);
2290 disk->devid = cpu_to_le64(cpu->devid);
2291 disk->pstart = cpu_to_le64(cpu->pstart);
2292 disk->pend = cpu_to_le64(cpu->pend);
2293 disk->vstart = cpu_to_le64(cpu->vstart);
2294 disk->vend = cpu_to_le64(cpu->vend);
2295 disk->target = cpu_to_le64(cpu->target);
2296 disk->flags = cpu_to_le64(cpu->flags);
2297 disk->limit = cpu_to_le64(cpu->limit);
2298 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2299 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2302 /* struct btrfs_super_block */
2303 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2304 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2305 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2307 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2308 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2309 struct btrfs_super_block, sys_chunk_array_size, 32);
2310 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2311 struct btrfs_super_block, chunk_root_generation, 64);
2312 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2314 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2316 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2317 chunk_root_level, 8);
2318 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2320 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2321 log_root_transid, 64);
2322 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2324 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2326 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2328 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2330 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2332 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2334 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2335 root_dir_objectid, 64);
2336 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2338 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2340 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2341 compat_ro_flags, 64);
2342 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2343 incompat_flags, 64);
2344 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2346 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2347 cache_generation, 64);
2348 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2349 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2350 uuid_tree_generation, 64);
2352 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2354 u16 t = btrfs_super_csum_type(s);
2356 * csum type is validated at mount time
2358 return btrfs_csum_sizes[t];
2363 * The leaf data grows from end-to-front in the node.
2364 * this returns the address of the start of the last item,
2365 * which is the stop of the leaf data stack
2367 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2368 const struct extent_buffer *leaf)
2370 u32 nr = btrfs_header_nritems(leaf);
2373 return BTRFS_LEAF_DATA_SIZE(fs_info);
2374 return btrfs_item_offset_nr(leaf, nr - 1);
2377 /* struct btrfs_file_extent_item */
2378 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2379 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2380 struct btrfs_file_extent_item, disk_bytenr, 64);
2381 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2382 struct btrfs_file_extent_item, offset, 64);
2383 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2384 struct btrfs_file_extent_item, generation, 64);
2385 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2386 struct btrfs_file_extent_item, num_bytes, 64);
2387 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2388 struct btrfs_file_extent_item, disk_num_bytes, 64);
2389 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2390 struct btrfs_file_extent_item, compression, 8);
2392 static inline unsigned long
2393 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2395 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2398 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2400 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2403 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2405 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2407 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2408 disk_num_bytes, 64);
2409 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2411 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2413 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2415 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2417 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2419 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2420 other_encoding, 16);
2423 * this returns the number of bytes used by the item on disk, minus the
2424 * size of any extent headers. If a file is compressed on disk, this is
2425 * the compressed size
2427 static inline u32 btrfs_file_extent_inline_item_len(
2428 const struct extent_buffer *eb,
2429 struct btrfs_item *e)
2431 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2434 /* btrfs_dev_stats_item */
2435 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2436 const struct btrfs_dev_stats_item *ptr,
2441 read_extent_buffer(eb, &val,
2442 offsetof(struct btrfs_dev_stats_item, values) +
2443 ((unsigned long)ptr) + (index * sizeof(u64)),
2448 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2449 struct btrfs_dev_stats_item *ptr,
2452 write_extent_buffer(eb, &val,
2453 offsetof(struct btrfs_dev_stats_item, values) +
2454 ((unsigned long)ptr) + (index * sizeof(u64)),
2458 /* btrfs_qgroup_status_item */
2459 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2461 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2463 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2465 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2468 /* btrfs_qgroup_info_item */
2469 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2471 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2472 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2474 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2475 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2478 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2479 struct btrfs_qgroup_info_item, generation, 64);
2480 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2482 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2483 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2484 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2486 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2487 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2489 /* btrfs_qgroup_limit_item */
2490 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2492 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2494 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2496 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2498 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2501 /* btrfs_dev_replace_item */
2502 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2503 struct btrfs_dev_replace_item, src_devid, 64);
2504 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2505 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2507 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2509 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2511 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2513 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2514 num_write_errors, 64);
2515 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2516 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2518 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2520 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2523 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2524 struct btrfs_dev_replace_item, src_devid, 64);
2525 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2526 struct btrfs_dev_replace_item,
2527 cont_reading_from_srcdev_mode, 64);
2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2529 struct btrfs_dev_replace_item, replace_state, 64);
2530 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2531 struct btrfs_dev_replace_item, time_started, 64);
2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2533 struct btrfs_dev_replace_item, time_stopped, 64);
2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2535 struct btrfs_dev_replace_item, num_write_errors, 64);
2536 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2537 struct btrfs_dev_replace_item,
2538 num_uncorrectable_read_errors, 64);
2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2540 struct btrfs_dev_replace_item, cursor_left, 64);
2541 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2542 struct btrfs_dev_replace_item, cursor_right, 64);
2544 /* helper function to cast into the data area of the leaf. */
2545 #define btrfs_item_ptr(leaf, slot, type) \
2546 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2547 btrfs_item_offset_nr(leaf, slot)))
2549 #define btrfs_item_ptr_offset(leaf, slot) \
2550 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2551 btrfs_item_offset_nr(leaf, slot)))
2553 static inline u64 btrfs_name_hash(const char *name, int len)
2555 return crc32c((u32)~1, name, len);
2559 * Figure the key offset of an extended inode ref
2561 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2564 return (u64) crc32c(parent_objectid, name, len);
2567 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2569 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2570 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2573 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2575 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2580 enum btrfs_inline_ref_type {
2581 BTRFS_REF_TYPE_INVALID = 0,
2582 BTRFS_REF_TYPE_BLOCK = 1,
2583 BTRFS_REF_TYPE_DATA = 2,
2584 BTRFS_REF_TYPE_ANY = 3,
2587 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2588 struct btrfs_extent_inline_ref *iref,
2589 enum btrfs_inline_ref_type is_data);
2591 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2593 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2596 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2600 * Doing a truncate won't result in new nodes or leaves, just what we need for
2603 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2606 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2609 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2610 struct btrfs_fs_info *fs_info);
2611 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2612 struct btrfs_fs_info *fs_info);
2613 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2615 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2616 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2617 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2618 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2619 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2620 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2621 unsigned long count);
2622 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2623 unsigned long count, u64 transid, int wait);
2624 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2625 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2626 struct btrfs_fs_info *fs_info, u64 bytenr,
2627 u64 offset, int metadata, u64 *refs, u64 *flags);
2628 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2629 u64 bytenr, u64 num, int reserved);
2630 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2631 u64 bytenr, u64 num_bytes);
2632 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2633 struct extent_buffer *eb);
2634 int btrfs_cross_ref_exist(struct btrfs_root *root,
2635 u64 objectid, u64 offset, u64 bytenr);
2636 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2637 struct btrfs_fs_info *info,
2639 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2640 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2641 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2642 struct btrfs_root *root,
2643 u64 parent, u64 root_objectid,
2644 const struct btrfs_disk_key *key,
2645 int level, u64 hint,
2647 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2648 struct btrfs_root *root,
2649 struct extent_buffer *buf,
2650 u64 parent, int last_ref);
2651 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2652 struct btrfs_root *root, u64 owner,
2653 u64 offset, u64 ram_bytes,
2654 struct btrfs_key *ins);
2655 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2656 u64 root_objectid, u64 owner, u64 offset,
2657 struct btrfs_key *ins);
2658 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2659 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2660 struct btrfs_key *ins, int is_data, int delalloc);
2661 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2662 struct extent_buffer *buf, int full_backref);
2663 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2664 struct extent_buffer *buf, int full_backref);
2665 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2666 struct btrfs_fs_info *fs_info,
2667 u64 bytenr, u64 num_bytes, u64 flags,
2668 int level, int is_data);
2669 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2670 struct btrfs_root *root,
2671 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2672 u64 owner, u64 offset);
2674 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2675 u64 start, u64 len, int delalloc);
2676 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2677 u64 start, u64 len);
2678 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2679 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2680 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2681 struct btrfs_root *root,
2682 u64 bytenr, u64 num_bytes, u64 parent,
2683 u64 root_objectid, u64 owner, u64 offset);
2685 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2686 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2687 struct btrfs_fs_info *fs_info);
2688 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2689 struct btrfs_fs_info *fs_info);
2690 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2691 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2692 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2693 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2694 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2695 u64 bytes_used, u64 type, u64 chunk_offset,
2697 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2698 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2699 struct btrfs_fs_info *fs_info,
2700 const u64 chunk_offset);
2701 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2702 u64 group_start, struct extent_map *em);
2703 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2704 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2705 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2706 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2707 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2708 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2709 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2710 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2712 enum btrfs_reserve_flush_enum {
2713 /* If we are in the transaction, we can't flush anything.*/
2714 BTRFS_RESERVE_NO_FLUSH,
2716 * Flushing delalloc may cause deadlock somewhere, in this
2717 * case, use FLUSH LIMIT
2719 BTRFS_RESERVE_FLUSH_LIMIT,
2720 BTRFS_RESERVE_FLUSH_ALL,
2723 enum btrfs_flush_state {
2724 FLUSH_DELAYED_ITEMS_NR = 1,
2725 FLUSH_DELAYED_ITEMS = 2,
2727 FLUSH_DELALLOC_WAIT = 4,
2732 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2733 int btrfs_check_data_free_space(struct inode *inode,
2734 struct extent_changeset **reserved, u64 start, u64 len);
2735 void btrfs_free_reserved_data_space(struct inode *inode,
2736 struct extent_changeset *reserved, u64 start, u64 len);
2737 void btrfs_delalloc_release_space(struct inode *inode,
2738 struct extent_changeset *reserved,
2739 u64 start, u64 len, bool qgroup_free);
2740 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2742 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2743 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2744 struct btrfs_block_rsv *rsv,
2745 int nitems, bool use_global_rsv);
2746 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2747 struct btrfs_block_rsv *rsv);
2748 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2751 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2752 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2754 int btrfs_delalloc_reserve_space(struct inode *inode,
2755 struct extent_changeset **reserved, u64 start, u64 len);
2756 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2757 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2758 unsigned short type);
2759 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2760 struct btrfs_block_rsv *rsv,
2761 unsigned short type);
2762 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2763 struct btrfs_block_rsv *rsv);
2764 int btrfs_block_rsv_add(struct btrfs_root *root,
2765 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2766 enum btrfs_reserve_flush_enum flush);
2767 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2768 int btrfs_block_rsv_refill(struct btrfs_root *root,
2769 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2770 enum btrfs_reserve_flush_enum flush);
2771 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2772 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2774 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2775 struct btrfs_block_rsv *dest, u64 num_bytes,
2777 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2778 struct btrfs_block_rsv *block_rsv,
2780 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2781 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2782 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2783 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2784 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2785 u64 start, u64 end);
2786 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2787 u64 num_bytes, u64 *actual_bytes);
2788 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2789 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2791 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2792 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2793 struct btrfs_fs_info *fs_info);
2794 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2795 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2796 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2797 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2798 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2799 u64 start, u64 end);
2800 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2803 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2804 int level, int *slot);
2805 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2806 int btrfs_previous_item(struct btrfs_root *root,
2807 struct btrfs_path *path, u64 min_objectid,
2809 int btrfs_previous_extent_item(struct btrfs_root *root,
2810 struct btrfs_path *path, u64 min_objectid);
2811 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2812 struct btrfs_path *path,
2813 const struct btrfs_key *new_key);
2814 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2815 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2816 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2817 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2818 struct btrfs_key *key, int lowest_level,
2820 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2821 struct btrfs_path *path,
2823 enum btrfs_compare_tree_result {
2824 BTRFS_COMPARE_TREE_NEW,
2825 BTRFS_COMPARE_TREE_DELETED,
2826 BTRFS_COMPARE_TREE_CHANGED,
2827 BTRFS_COMPARE_TREE_SAME,
2829 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2830 struct btrfs_path *right_path,
2831 struct btrfs_key *key,
2832 enum btrfs_compare_tree_result result,
2834 int btrfs_compare_trees(struct btrfs_root *left_root,
2835 struct btrfs_root *right_root,
2836 btrfs_changed_cb_t cb, void *ctx);
2837 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2838 struct btrfs_root *root, struct extent_buffer *buf,
2839 struct extent_buffer *parent, int parent_slot,
2840 struct extent_buffer **cow_ret);
2841 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2842 struct btrfs_root *root,
2843 struct extent_buffer *buf,
2844 struct extent_buffer **cow_ret, u64 new_root_objectid);
2845 int btrfs_block_can_be_shared(struct btrfs_root *root,
2846 struct extent_buffer *buf);
2847 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2849 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2850 struct btrfs_path *path, u32 new_size, int from_end);
2851 int btrfs_split_item(struct btrfs_trans_handle *trans,
2852 struct btrfs_root *root,
2853 struct btrfs_path *path,
2854 const struct btrfs_key *new_key,
2855 unsigned long split_offset);
2856 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2857 struct btrfs_root *root,
2858 struct btrfs_path *path,
2859 const struct btrfs_key *new_key);
2860 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2861 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2862 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2863 const struct btrfs_key *key, struct btrfs_path *p,
2864 int ins_len, int cow);
2865 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2866 struct btrfs_path *p, u64 time_seq);
2867 int btrfs_search_slot_for_read(struct btrfs_root *root,
2868 const struct btrfs_key *key,
2869 struct btrfs_path *p, int find_higher,
2871 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2872 struct btrfs_root *root, struct extent_buffer *parent,
2873 int start_slot, u64 *last_ret,
2874 struct btrfs_key *progress);
2875 void btrfs_release_path(struct btrfs_path *p);
2876 struct btrfs_path *btrfs_alloc_path(void);
2877 void btrfs_free_path(struct btrfs_path *p);
2878 void btrfs_set_path_blocking(struct btrfs_path *p);
2879 void btrfs_clear_path_blocking(struct btrfs_path *p,
2880 struct extent_buffer *held, int held_rw);
2881 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2883 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2884 struct btrfs_path *path, int slot, int nr);
2885 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2886 struct btrfs_root *root,
2887 struct btrfs_path *path)
2889 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2892 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2893 const struct btrfs_key *cpu_key, u32 *data_size,
2894 u32 total_data, u32 total_size, int nr);
2895 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2896 const struct btrfs_key *key, void *data, u32 data_size);
2897 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2898 struct btrfs_root *root,
2899 struct btrfs_path *path,
2900 const struct btrfs_key *cpu_key, u32 *data_size,
2903 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2904 struct btrfs_root *root,
2905 struct btrfs_path *path,
2906 const struct btrfs_key *key,
2909 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2912 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2913 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2914 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2916 static inline int btrfs_next_old_item(struct btrfs_root *root,
2917 struct btrfs_path *p, u64 time_seq)
2920 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2921 return btrfs_next_old_leaf(root, p, time_seq);
2924 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2926 return btrfs_next_old_item(root, p, 0);
2928 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2929 struct extent_buffer *leaf);
2930 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2931 struct btrfs_block_rsv *block_rsv,
2932 int update_ref, int for_reloc);
2933 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2934 struct btrfs_root *root,
2935 struct extent_buffer *node,
2936 struct extent_buffer *parent);
2937 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2940 * Do it this way so we only ever do one test_bit in the normal case.
2942 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2943 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2951 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2952 * anything except sleeping. This function is used to check the status of
2955 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2957 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2960 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2962 kfree(fs_info->balance_ctl);
2963 kfree(fs_info->delayed_root);
2964 kfree(fs_info->extent_root);
2965 kfree(fs_info->tree_root);
2966 kfree(fs_info->chunk_root);
2967 kfree(fs_info->dev_root);
2968 kfree(fs_info->csum_root);
2969 kfree(fs_info->quota_root);
2970 kfree(fs_info->uuid_root);
2971 kfree(fs_info->free_space_root);
2972 kfree(fs_info->super_copy);
2973 kfree(fs_info->super_for_commit);
2974 security_free_mnt_opts(&fs_info->security_opts);
2978 /* tree mod log functions from ctree.c */
2979 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2980 struct seq_list *elem);
2981 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2982 struct seq_list *elem);
2983 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2986 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2987 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2989 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2990 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2992 int btrfs_del_root(struct btrfs_trans_handle *trans,
2993 const struct btrfs_key *key);
2994 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2995 const struct btrfs_key *key,
2996 struct btrfs_root_item *item);
2997 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2998 struct btrfs_root *root,
2999 struct btrfs_key *key,
3000 struct btrfs_root_item *item);
3001 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3002 struct btrfs_path *path, struct btrfs_root_item *root_item,
3003 struct btrfs_key *root_key);
3004 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3005 void btrfs_set_root_node(struct btrfs_root_item *item,
3006 struct extent_buffer *node);
3007 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3008 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3009 struct btrfs_root *root);
3012 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3014 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3016 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3017 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3021 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3022 const char *name, int name_len);
3023 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3024 struct btrfs_root *root, const char *name,
3025 int name_len, struct btrfs_inode *dir,
3026 struct btrfs_key *location, u8 type, u64 index);
3027 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3028 struct btrfs_root *root,
3029 struct btrfs_path *path, u64 dir,
3030 const char *name, int name_len,
3032 struct btrfs_dir_item *
3033 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3034 struct btrfs_root *root,
3035 struct btrfs_path *path, u64 dir,
3036 u64 objectid, const char *name, int name_len,
3038 struct btrfs_dir_item *
3039 btrfs_search_dir_index_item(struct btrfs_root *root,
3040 struct btrfs_path *path, u64 dirid,
3041 const char *name, int name_len);
3042 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3043 struct btrfs_root *root,
3044 struct btrfs_path *path,
3045 struct btrfs_dir_item *di);
3046 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3047 struct btrfs_root *root,
3048 struct btrfs_path *path, u64 objectid,
3049 const char *name, u16 name_len,
3050 const void *data, u16 data_len);
3051 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3052 struct btrfs_root *root,
3053 struct btrfs_path *path, u64 dir,
3054 const char *name, u16 name_len,
3056 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3057 struct btrfs_path *path,
3062 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3063 struct btrfs_root *root, u64 offset);
3064 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3065 struct btrfs_root *root, u64 offset);
3066 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3069 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3070 struct btrfs_root *root,
3071 const char *name, int name_len,
3072 u64 inode_objectid, u64 ref_objectid, u64 index);
3073 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3074 struct btrfs_root *root,
3075 const char *name, int name_len,
3076 u64 inode_objectid, u64 ref_objectid, u64 *index);
3077 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3078 struct btrfs_root *root,
3079 struct btrfs_path *path, u64 objectid);
3080 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3081 *root, struct btrfs_path *path,
3082 struct btrfs_key *location, int mod);
3084 struct btrfs_inode_extref *
3085 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3086 struct btrfs_root *root,
3087 struct btrfs_path *path,
3088 const char *name, int name_len,
3089 u64 inode_objectid, u64 ref_objectid, int ins_len,
3092 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3094 int name_len, struct btrfs_inode_ref **ref_ret);
3095 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3096 u64 ref_objectid, const char *name,
3098 struct btrfs_inode_extref **extref_ret);
3101 struct btrfs_dio_private;
3102 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3103 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3104 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3105 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3106 u64 logical_offset);
3107 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3108 struct btrfs_root *root,
3109 u64 objectid, u64 pos,
3110 u64 disk_offset, u64 disk_num_bytes,
3111 u64 num_bytes, u64 offset, u64 ram_bytes,
3112 u8 compression, u8 encryption, u16 other_encoding);
3113 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root,
3115 struct btrfs_path *path, u64 objectid,
3116 u64 bytenr, int mod);
3117 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3118 struct btrfs_root *root,
3119 struct btrfs_ordered_sum *sums);
3120 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3121 u64 file_start, int contig);
3122 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3123 struct list_head *list, int search_commit);
3124 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3125 const struct btrfs_path *path,
3126 struct btrfs_file_extent_item *fi,
3127 const bool new_inline,
3128 struct extent_map *em);
3131 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3132 struct page *page, size_t pg_offset, u64 start,
3133 u64 len, int create);
3134 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3135 u64 *orig_start, u64 *orig_block_len,
3138 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3139 struct btrfs_inode *inode);
3140 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3141 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3142 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3143 struct btrfs_root *root,
3144 struct btrfs_inode *dir, struct btrfs_inode *inode,
3145 const char *name, int name_len);
3146 int btrfs_add_link(struct btrfs_trans_handle *trans,
3147 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3148 const char *name, int name_len, int add_backref, u64 index);
3149 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3150 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3152 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root,
3154 struct inode *inode, u64 new_size,
3157 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
3158 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3159 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3160 unsigned int extra_bits,
3161 struct extent_state **cached_state, int dedupe);
3162 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *new_root,
3164 struct btrfs_root *parent_root,
3166 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3167 size_t size, struct bio *bio,
3168 unsigned long bio_flags);
3169 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3170 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3171 int btrfs_readpage(struct file *file, struct page *page);
3172 void btrfs_evict_inode(struct inode *inode);
3173 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3174 struct inode *btrfs_alloc_inode(struct super_block *sb);
3175 void btrfs_destroy_inode(struct inode *inode);
3176 int btrfs_drop_inode(struct inode *inode);
3177 int __init btrfs_init_cachep(void);
3178 void __cold btrfs_destroy_cachep(void);
3179 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3180 struct btrfs_root *root, int *was_new);
3181 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3182 struct page *page, size_t pg_offset,
3183 u64 start, u64 end, int create);
3184 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3185 struct btrfs_root *root,
3186 struct inode *inode);
3187 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3188 struct btrfs_root *root, struct inode *inode);
3189 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3190 struct btrfs_inode *inode);
3191 int btrfs_orphan_cleanup(struct btrfs_root *root);
3192 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3193 void btrfs_add_delayed_iput(struct inode *inode);
3194 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3195 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3196 u64 start, u64 num_bytes, u64 min_size,
3197 loff_t actual_len, u64 *alloc_hint);
3198 int btrfs_prealloc_file_range_trans(struct inode *inode,
3199 struct btrfs_trans_handle *trans, int mode,
3200 u64 start, u64 num_bytes, u64 min_size,
3201 loff_t actual_len, u64 *alloc_hint);
3202 extern const struct dentry_operations btrfs_dentry_operations;
3203 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3204 void btrfs_test_inode_set_ops(struct inode *inode);
3208 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3209 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3210 int btrfs_ioctl_get_supported_features(void __user *arg);
3211 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3212 int btrfs_is_empty_uuid(u8 *uuid);
3213 int btrfs_defrag_file(struct inode *inode, struct file *file,
3214 struct btrfs_ioctl_defrag_range_args *range,
3215 u64 newer_than, unsigned long max_pages);
3216 void btrfs_get_block_group_info(struct list_head *groups_list,
3217 struct btrfs_ioctl_space_info *space);
3218 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3219 struct btrfs_ioctl_balance_args *bargs);
3220 int btrfs_dedupe_file_range(struct file *src_file, loff_t src_loff,
3221 struct file *dst_file, loff_t dst_loff,
3225 int __init btrfs_auto_defrag_init(void);
3226 void __cold btrfs_auto_defrag_exit(void);
3227 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3228 struct btrfs_inode *inode);
3229 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3230 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3231 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3232 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3234 extern const struct file_operations btrfs_file_operations;
3235 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3236 struct btrfs_root *root, struct inode *inode,
3237 struct btrfs_path *path, u64 start, u64 end,
3238 u64 *drop_end, int drop_cache,
3240 u32 extent_item_size,
3242 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3243 struct btrfs_root *root, struct inode *inode, u64 start,
3244 u64 end, int drop_cache);
3245 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3246 struct btrfs_inode *inode, u64 start, u64 end);
3247 int btrfs_release_file(struct inode *inode, struct file *file);
3248 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3249 size_t num_pages, loff_t pos, size_t write_bytes,
3250 struct extent_state **cached);
3251 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3252 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3253 struct file *file_out, loff_t pos_out, u64 len);
3256 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3257 struct btrfs_root *root);
3260 int __init btrfs_init_sysfs(void);
3261 void __cold btrfs_exit_sysfs(void);
3262 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3263 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3266 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3267 unsigned long new_flags);
3268 int btrfs_sync_fs(struct super_block *sb, int wait);
3270 static inline __printf(2, 3) __cold
3271 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3275 #ifdef CONFIG_PRINTK
3278 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3280 #define btrfs_printk(fs_info, fmt, args...) \
3281 btrfs_no_printk(fs_info, fmt, ##args)
3284 #define btrfs_emerg(fs_info, fmt, args...) \
3285 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3286 #define btrfs_alert(fs_info, fmt, args...) \
3287 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3288 #define btrfs_crit(fs_info, fmt, args...) \
3289 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3290 #define btrfs_err(fs_info, fmt, args...) \
3291 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3292 #define btrfs_warn(fs_info, fmt, args...) \
3293 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3294 #define btrfs_notice(fs_info, fmt, args...) \
3295 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3296 #define btrfs_info(fs_info, fmt, args...) \
3297 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3300 * Wrappers that use printk_in_rcu
3302 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3303 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3304 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3305 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3306 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3307 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3308 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3309 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3310 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3311 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3312 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3313 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3314 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3315 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3318 * Wrappers that use a ratelimited printk_in_rcu
3320 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3321 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3322 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3323 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3324 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3325 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3326 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3327 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3328 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3329 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3330 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3331 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3332 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3333 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3336 * Wrappers that use a ratelimited printk
3338 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3339 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3340 #define btrfs_alert_rl(fs_info, fmt, args...) \
3341 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3342 #define btrfs_crit_rl(fs_info, fmt, args...) \
3343 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3344 #define btrfs_err_rl(fs_info, fmt, args...) \
3345 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3346 #define btrfs_warn_rl(fs_info, fmt, args...) \
3347 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3348 #define btrfs_notice_rl(fs_info, fmt, args...) \
3349 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3350 #define btrfs_info_rl(fs_info, fmt, args...) \
3351 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3353 #if defined(CONFIG_DYNAMIC_DEBUG)
3354 #define btrfs_debug(fs_info, fmt, args...) \
3356 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3357 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3358 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3360 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3362 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3363 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3364 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3366 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3368 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3369 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3370 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3373 #define btrfs_debug_rl(fs_info, fmt, args...) \
3375 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3376 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3377 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3380 #elif defined(DEBUG)
3381 #define btrfs_debug(fs_info, fmt, args...) \
3382 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3383 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3384 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3385 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3386 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3387 #define btrfs_debug_rl(fs_info, fmt, args...) \
3388 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3390 #define btrfs_debug(fs_info, fmt, args...) \
3391 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3392 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3393 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3394 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3395 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3396 #define btrfs_debug_rl(fs_info, fmt, args...) \
3397 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3400 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3403 btrfs_printk(fs_info, fmt, ##args); \
3404 rcu_read_unlock(); \
3407 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3409 static DEFINE_RATELIMIT_STATE(_rs, \
3410 DEFAULT_RATELIMIT_INTERVAL, \
3411 DEFAULT_RATELIMIT_BURST); \
3412 if (__ratelimit(&_rs)) \
3413 btrfs_printk(fs_info, fmt, ##args); \
3416 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3419 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3420 rcu_read_unlock(); \
3423 #ifdef CONFIG_BTRFS_ASSERT
3426 static inline void assfail(const char *expr, const char *file, int line)
3428 pr_err("assertion failed: %s, file: %s, line: %d\n",
3433 #define ASSERT(expr) \
3434 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3436 #define ASSERT(expr) ((void)0)
3440 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3443 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3448 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3449 unsigned int line, int errno, const char *fmt, ...);
3451 const char *btrfs_decode_error(int errno);
3454 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3455 const char *function,
3456 unsigned int line, int errno);
3459 * Call btrfs_abort_transaction as early as possible when an error condition is
3460 * detected, that way the exact line number is reported.
3462 #define btrfs_abort_transaction(trans, errno) \
3464 /* Report first abort since mount */ \
3465 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3466 &((trans)->fs_info->fs_state))) { \
3467 if ((errno) != -EIO) { \
3468 WARN(1, KERN_DEBUG \
3469 "BTRFS: Transaction aborted (error %d)\n", \
3472 btrfs_debug((trans)->fs_info, \
3473 "Transaction aborted (error %d)", \
3477 __btrfs_abort_transaction((trans), __func__, \
3478 __LINE__, (errno)); \
3481 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3483 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3484 (errno), fmt, ##args); \
3489 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3490 unsigned int line, int errno, const char *fmt, ...);
3492 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3493 * will panic(). Otherwise we BUG() here.
3495 #define btrfs_panic(fs_info, errno, fmt, args...) \
3497 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3502 /* compatibility and incompatibility defines */
3504 #define btrfs_set_fs_incompat(__fs_info, opt) \
3505 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3507 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3510 struct btrfs_super_block *disk_super;
3513 disk_super = fs_info->super_copy;
3514 features = btrfs_super_incompat_flags(disk_super);
3515 if (!(features & flag)) {
3516 spin_lock(&fs_info->super_lock);
3517 features = btrfs_super_incompat_flags(disk_super);
3518 if (!(features & flag)) {
3520 btrfs_set_super_incompat_flags(disk_super, features);
3521 btrfs_info(fs_info, "setting %llu feature flag",
3524 spin_unlock(&fs_info->super_lock);
3528 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3529 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3531 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3534 struct btrfs_super_block *disk_super;
3537 disk_super = fs_info->super_copy;
3538 features = btrfs_super_incompat_flags(disk_super);
3539 if (features & flag) {
3540 spin_lock(&fs_info->super_lock);
3541 features = btrfs_super_incompat_flags(disk_super);
3542 if (features & flag) {
3544 btrfs_set_super_incompat_flags(disk_super, features);
3545 btrfs_info(fs_info, "clearing %llu feature flag",
3548 spin_unlock(&fs_info->super_lock);
3552 #define btrfs_fs_incompat(fs_info, opt) \
3553 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3555 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3557 struct btrfs_super_block *disk_super;
3558 disk_super = fs_info->super_copy;
3559 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3562 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3563 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3565 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3568 struct btrfs_super_block *disk_super;
3571 disk_super = fs_info->super_copy;
3572 features = btrfs_super_compat_ro_flags(disk_super);
3573 if (!(features & flag)) {
3574 spin_lock(&fs_info->super_lock);
3575 features = btrfs_super_compat_ro_flags(disk_super);
3576 if (!(features & flag)) {
3578 btrfs_set_super_compat_ro_flags(disk_super, features);
3579 btrfs_info(fs_info, "setting %llu ro feature flag",
3582 spin_unlock(&fs_info->super_lock);
3586 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3587 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3589 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3592 struct btrfs_super_block *disk_super;
3595 disk_super = fs_info->super_copy;
3596 features = btrfs_super_compat_ro_flags(disk_super);
3597 if (features & flag) {
3598 spin_lock(&fs_info->super_lock);
3599 features = btrfs_super_compat_ro_flags(disk_super);
3600 if (features & flag) {
3602 btrfs_set_super_compat_ro_flags(disk_super, features);
3603 btrfs_info(fs_info, "clearing %llu ro feature flag",
3606 spin_unlock(&fs_info->super_lock);
3610 #define btrfs_fs_compat_ro(fs_info, opt) \
3611 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3613 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3615 struct btrfs_super_block *disk_super;
3616 disk_super = fs_info->super_copy;
3617 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3621 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3622 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3623 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3624 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3625 struct inode *inode, struct inode *dir);
3627 #define btrfs_get_acl NULL
3628 #define btrfs_set_acl NULL
3629 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3630 struct inode *inode, struct inode *dir)
3637 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3638 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3639 struct btrfs_root *root);
3640 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3641 struct btrfs_root *root);
3642 int btrfs_recover_relocation(struct btrfs_root *root);
3643 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3644 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3645 struct btrfs_root *root, struct extent_buffer *buf,
3646 struct extent_buffer *cow);
3647 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3648 u64 *bytes_to_reserve);
3649 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3650 struct btrfs_pending_snapshot *pending);
3653 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3654 u64 end, struct btrfs_scrub_progress *progress,
3655 int readonly, int is_dev_replace);
3656 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3657 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3658 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3659 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3660 struct btrfs_device *dev);
3661 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3662 struct btrfs_scrub_progress *progress);
3663 static inline void btrfs_init_full_stripe_locks_tree(
3664 struct btrfs_full_stripe_locks_tree *locks_root)
3666 locks_root->root = RB_ROOT;
3667 mutex_init(&locks_root->lock);
3671 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3672 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3673 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3675 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3677 btrfs_bio_counter_sub(fs_info, 1);
3681 struct reada_control {
3682 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3683 struct btrfs_key key_start;
3684 struct btrfs_key key_end; /* exclusive */
3687 wait_queue_head_t wait;
3689 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3690 struct btrfs_key *start, struct btrfs_key *end);
3691 int btrfs_reada_wait(void *handle);
3692 void btrfs_reada_detach(void *handle);
3693 int btree_readahead_hook(struct extent_buffer *eb, int err);
3695 static inline int is_fstree(u64 rootid)
3697 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3698 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3699 !btrfs_qgroup_level(rootid)))
3704 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3706 return signal_pending(current);
3709 /* Sanity test specific functions */
3710 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3711 void btrfs_test_destroy_inode(struct inode *inode);
3714 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3716 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3717 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3718 &fs_info->fs_state)))
3724 static inline void cond_wake_up(struct wait_queue_head *wq)
3727 * This implies a full smp_mb barrier, see comments for
3728 * waitqueue_active why.
3730 if (wq_has_sleeper(wq))
3734 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3737 * Special case for conditional wakeup where the barrier required for
3738 * waitqueue_active is implied by some of the preceding code. Eg. one
3739 * of such atomic operations (atomic_dec_and_return, ...), or a
3740 * unlock/lock sequence, etc.
3742 if (waitqueue_active(wq))