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 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
46 #define BTRFS_MAX_MIRRORS 3
48 #define BTRFS_MAX_LEVEL 8
50 #define BTRFS_OLDEST_GENERATION 0ULL
53 * the max metadata block size. This limit is somewhat artificial,
54 * but the memmove costs go through the roof for larger blocks.
56 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
59 * we can actually store much bigger names, but lets not confuse the rest
62 #define BTRFS_NAME_LEN 255
65 * Theoretical limit is larger, but we keep this down to a sane
66 * value. That should limit greatly the possibility of collisions on
69 #define BTRFS_LINK_MAX 65535U
71 /* four bytes for CRC32 */
72 static const int btrfs_csum_sizes[] = { 4 };
74 #define BTRFS_EMPTY_DIR_SIZE 0
76 /* ioprio of readahead is set to idle */
77 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
79 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
82 * Use large batch size to reduce overhead of metadata updates. On the reader
83 * side, we only read it when we are close to ENOSPC and the read overhead is
84 * mostly related to the number of CPUs, so it is OK to use arbitrary large
87 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
89 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
93 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
95 static inline u32 count_max_extents(u64 size)
97 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
100 struct btrfs_mapping_tree {
101 struct extent_map_tree map_tree;
104 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
106 BUG_ON(num_stripes == 0);
107 return sizeof(struct btrfs_chunk) +
108 sizeof(struct btrfs_stripe) * (num_stripes - 1);
114 #define BTRFS_FS_STATE_ERROR 0
115 #define BTRFS_FS_STATE_REMOUNTING 1
116 #define BTRFS_FS_STATE_TRANS_ABORTED 2
117 #define BTRFS_FS_STATE_DEV_REPLACING 3
118 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
120 #define BTRFS_BACKREF_REV_MAX 256
121 #define BTRFS_BACKREF_REV_SHIFT 56
122 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
123 BTRFS_BACKREF_REV_SHIFT)
125 #define BTRFS_OLD_BACKREF_REV 0
126 #define BTRFS_MIXED_BACKREF_REV 1
129 * every tree block (leaf or node) starts with this header.
131 struct btrfs_header {
132 /* these first four must match the super block */
133 u8 csum[BTRFS_CSUM_SIZE];
134 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
135 __le64 bytenr; /* which block this node is supposed to live in */
138 /* allowed to be different from the super from here on down */
139 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
144 } __attribute__ ((__packed__));
147 * this is a very generous portion of the super block, giving us
148 * room to translate 14 chunks with 3 stripes each.
150 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
153 * just in case we somehow lose the roots and are not able to mount,
154 * we store an array of the roots from previous transactions
157 #define BTRFS_NUM_BACKUP_ROOTS 4
158 struct btrfs_root_backup {
160 __le64 tree_root_gen;
163 __le64 chunk_root_gen;
166 __le64 extent_root_gen;
175 __le64 csum_root_gen;
185 u8 extent_root_level;
189 /* future and to align */
191 } __attribute__ ((__packed__));
194 * the super block basically lists the main trees of the FS
195 * it currently lacks any block count etc etc
197 struct btrfs_super_block {
198 u8 csum[BTRFS_CSUM_SIZE];
199 /* the first 4 fields must match struct btrfs_header */
200 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
201 __le64 bytenr; /* this block number */
204 /* allowed to be different from the btrfs_header from here own down */
211 /* this will help find the new super based on the log root */
212 __le64 log_root_transid;
215 __le64 root_dir_objectid;
219 __le32 __unused_leafsize;
221 __le32 sys_chunk_array_size;
222 __le64 chunk_root_generation;
224 __le64 compat_ro_flags;
225 __le64 incompat_flags;
230 struct btrfs_dev_item dev_item;
232 char label[BTRFS_LABEL_SIZE];
234 __le64 cache_generation;
235 __le64 uuid_tree_generation;
237 /* future expansion */
239 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
240 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
241 } __attribute__ ((__packed__));
244 * Compat flags that we support. If any incompat flags are set other than the
245 * ones specified below then we will fail to mount
247 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
248 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
249 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
251 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
252 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
253 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
255 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
256 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
258 #define BTRFS_FEATURE_INCOMPAT_SUPP \
259 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
260 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
261 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
262 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
263 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
264 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
265 BTRFS_FEATURE_INCOMPAT_RAID56 | \
266 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
267 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
268 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
270 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
271 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
272 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
275 * A leaf is full of items. offset and size tell us where to find
276 * the item in the leaf (relative to the start of the data area)
279 struct btrfs_disk_key key;
282 } __attribute__ ((__packed__));
285 * leaves have an item area and a data area:
286 * [item0, item1....itemN] [free space] [dataN...data1, data0]
288 * The data is separate from the items to get the keys closer together
292 struct btrfs_header header;
293 struct btrfs_item items[];
294 } __attribute__ ((__packed__));
297 * all non-leaf blocks are nodes, they hold only keys and pointers to
300 struct btrfs_key_ptr {
301 struct btrfs_disk_key key;
304 } __attribute__ ((__packed__));
307 struct btrfs_header header;
308 struct btrfs_key_ptr ptrs[];
309 } __attribute__ ((__packed__));
312 * btrfs_paths remember the path taken from the root down to the leaf.
313 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
314 * to any other levels that are present.
316 * The slots array records the index of the item or block pointer
317 * used while walking the tree.
319 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
321 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
322 int slots[BTRFS_MAX_LEVEL];
323 /* if there is real range locking, this locks field will change */
324 u8 locks[BTRFS_MAX_LEVEL];
326 /* keep some upper locks as we walk down */
330 * set by btrfs_split_item, tells search_slot to keep all locks
331 * and to force calls to keep space in the nodes
333 unsigned int search_for_split:1;
334 unsigned int keep_locks:1;
335 unsigned int skip_locking:1;
336 unsigned int leave_spinning:1;
337 unsigned int search_commit_root:1;
338 unsigned int need_commit_sem:1;
339 unsigned int skip_release_on_error:1;
341 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
342 sizeof(struct btrfs_item))
343 struct btrfs_dev_replace {
344 u64 replace_state; /* see #define above */
345 time64_t time_started; /* seconds since 1-Jan-1970 */
346 time64_t time_stopped; /* seconds since 1-Jan-1970 */
347 atomic64_t num_write_errors;
348 atomic64_t num_uncorrectable_read_errors;
351 u64 committed_cursor_left;
352 u64 cursor_left_last_write_of_item;
355 u64 cont_reading_from_srcdev_mode; /* see #define above */
358 int item_needs_writeback;
359 struct btrfs_device *srcdev;
360 struct btrfs_device *tgtdev;
362 struct mutex lock_finishing_cancel_unmount;
364 atomic_t blocking_readers;
365 wait_queue_head_t read_lock_wq;
367 struct btrfs_scrub_progress scrub_progress;
370 /* For raid type sysfs entries */
371 struct raid_kobject {
374 struct list_head list;
377 struct btrfs_space_info {
380 u64 total_bytes; /* total bytes in the space,
381 this doesn't take mirrors into account */
382 u64 bytes_used; /* total bytes used,
383 this doesn't take mirrors into account */
384 u64 bytes_pinned; /* total bytes pinned, will be freed when the
385 transaction finishes */
386 u64 bytes_reserved; /* total bytes the allocator has reserved for
387 current allocations */
388 u64 bytes_may_use; /* number of bytes that may be used for
389 delalloc/allocations */
390 u64 bytes_readonly; /* total bytes that are read only */
392 u64 max_extent_size; /* This will hold the maximum extent size of
393 the space info if we had an ENOSPC in the
396 unsigned int full:1; /* indicates that we cannot allocate any more
397 chunks for this space */
398 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
400 unsigned int flush:1; /* set if we are trying to make space */
402 unsigned int force_alloc; /* set if we need to force a chunk
403 alloc for this space */
405 u64 disk_used; /* total bytes used on disk */
406 u64 disk_total; /* total bytes on disk, takes mirrors into
412 * bytes_pinned is kept in line with what is actually pinned, as in
413 * we've called update_block_group and dropped the bytes_used counter
414 * and increased the bytes_pinned counter. However this means that
415 * bytes_pinned does not reflect the bytes that will be pinned once the
416 * delayed refs are flushed, so this counter is inc'ed every time we
417 * call btrfs_free_extent so it is a realtime count of what will be
418 * freed once the transaction is committed. It will be zeroed every
419 * time the transaction commits.
421 struct percpu_counter total_bytes_pinned;
423 struct list_head list;
424 /* Protected by the spinlock 'lock'. */
425 struct list_head ro_bgs;
426 struct list_head priority_tickets;
427 struct list_head tickets;
429 * tickets_id just indicates the next ticket will be handled, so note
430 * it's not stored per ticket.
434 struct rw_semaphore groups_sem;
435 /* for block groups in our same type */
436 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
437 wait_queue_head_t wait;
440 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
443 #define BTRFS_BLOCK_RSV_GLOBAL 1
444 #define BTRFS_BLOCK_RSV_DELALLOC 2
445 #define BTRFS_BLOCK_RSV_TRANS 3
446 #define BTRFS_BLOCK_RSV_CHUNK 4
447 #define BTRFS_BLOCK_RSV_DELOPS 5
448 #define BTRFS_BLOCK_RSV_EMPTY 6
449 #define BTRFS_BLOCK_RSV_TEMP 7
451 struct btrfs_block_rsv {
454 struct btrfs_space_info *space_info;
458 unsigned short failfast;
461 * Qgroup equivalent for @size @reserved
463 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
464 * about things like csum size nor how many tree blocks it will need to
467 * Qgroup cares more about net change of the extent usage.
469 * So for one newly inserted file extent, in worst case it will cause
470 * leaf split and level increase, nodesize for each file extent is
473 * In short, qgroup_size/reserved is the upper limit of possible needed
474 * qgroup metadata reservation.
477 u64 qgroup_rsv_reserved;
481 * free clusters are used to claim free space in relatively large chunks,
482 * allowing us to do less seeky writes. They are used for all metadata
483 * allocations. In ssd_spread mode they are also used for data allocations.
485 struct btrfs_free_cluster {
487 spinlock_t refill_lock;
490 /* largest extent in this cluster */
493 /* first extent starting offset */
496 /* We did a full search and couldn't create a cluster */
499 struct btrfs_block_group_cache *block_group;
501 * when a cluster is allocated from a block group, we put the
502 * cluster onto a list in the block group so that it can
503 * be freed before the block group is freed.
505 struct list_head block_group_list;
508 enum btrfs_caching_type {
510 BTRFS_CACHE_STARTED = 1,
511 BTRFS_CACHE_FAST = 2,
512 BTRFS_CACHE_FINISHED = 3,
513 BTRFS_CACHE_ERROR = 4,
516 enum btrfs_disk_cache_state {
517 BTRFS_DC_WRITTEN = 0,
523 struct btrfs_caching_control {
524 struct list_head list;
526 wait_queue_head_t wait;
527 struct btrfs_work work;
528 struct btrfs_block_group_cache *block_group;
533 /* Once caching_thread() finds this much free space, it will wake up waiters. */
534 #define CACHING_CTL_WAKE_UP SZ_2M
536 struct btrfs_io_ctl {
540 struct btrfs_fs_info *fs_info;
547 unsigned check_crcs:1;
551 * Tree to record all locked full stripes of a RAID5/6 block group
553 struct btrfs_full_stripe_locks_tree {
558 struct btrfs_block_group_cache {
559 struct btrfs_key key;
560 struct btrfs_block_group_item item;
561 struct btrfs_fs_info *fs_info;
569 u64 cache_generation;
572 * If the free space extent count exceeds this number, convert the block
575 u32 bitmap_high_thresh;
578 * If the free space extent count drops below this number, convert the
579 * block group back to extents.
581 u32 bitmap_low_thresh;
584 * It is just used for the delayed data space allocation because
585 * only the data space allocation and the relative metadata update
586 * can be done cross the transaction.
588 struct rw_semaphore data_rwsem;
590 /* for raid56, this is a full stripe, without parity */
591 unsigned long full_stripe_len;
595 unsigned int has_caching_ctl:1;
596 unsigned int removed:1;
598 int disk_cache_state;
600 /* cache tracking stuff */
602 struct btrfs_caching_control *caching_ctl;
603 u64 last_byte_to_unpin;
605 struct btrfs_space_info *space_info;
607 /* free space cache stuff */
608 struct btrfs_free_space_ctl *free_space_ctl;
610 /* block group cache stuff */
611 struct rb_node cache_node;
613 /* for block groups in the same raid type */
614 struct list_head list;
619 /* List of struct btrfs_free_clusters for this block group.
620 * Today it will only have one thing on it, but that may change
622 struct list_head cluster_list;
624 /* For delayed block group creation or deletion of empty block groups */
625 struct list_head bg_list;
627 /* For read-only block groups */
628 struct list_head ro_list;
632 /* For dirty block groups */
633 struct list_head dirty_list;
634 struct list_head io_list;
636 struct btrfs_io_ctl io_ctl;
639 * Incremented when doing extent allocations and holding a read lock
640 * on the space_info's groups_sem semaphore.
641 * Decremented when an ordered extent that represents an IO against this
642 * block group's range is created (after it's added to its inode's
643 * root's list of ordered extents) or immediately after the allocation
644 * if it's a metadata extent or fallocate extent (for these cases we
645 * don't create ordered extents).
647 atomic_t reservations;
650 * Incremented while holding the spinlock *lock* by a task checking if
651 * it can perform a nocow write (incremented if the value for the *ro*
652 * field is 0). Decremented by such tasks once they create an ordered
653 * extent or before that if some error happens before reaching that step.
654 * This is to prevent races between block group relocation and nocow
655 * writes through direct IO.
657 atomic_t nocow_writers;
659 /* Lock for free space tree operations. */
660 struct mutex free_space_lock;
663 * Does the block group need to be added to the free space tree?
664 * Protected by free_space_lock.
666 int needs_free_space;
668 /* Record locked full stripes for RAID5/6 block group */
669 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
672 /* delayed seq elem */
674 struct list_head list;
678 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
680 #define SEQ_LAST ((u64)-1)
682 enum btrfs_orphan_cleanup_state {
683 ORPHAN_CLEANUP_STARTED = 1,
684 ORPHAN_CLEANUP_DONE = 2,
687 /* used by the raid56 code to lock stripes for read/modify/write */
688 struct btrfs_stripe_hash {
689 struct list_head hash_list;
693 /* used by the raid56 code to lock stripes for read/modify/write */
694 struct btrfs_stripe_hash_table {
695 struct list_head stripe_cache;
696 spinlock_t cache_lock;
698 struct btrfs_stripe_hash table[];
701 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
703 void btrfs_init_async_reclaim_work(struct work_struct *work);
706 struct reloc_control;
708 struct btrfs_fs_devices;
709 struct btrfs_balance_control;
710 struct btrfs_delayed_root;
712 #define BTRFS_FS_BARRIER 1
713 #define BTRFS_FS_CLOSING_START 2
714 #define BTRFS_FS_CLOSING_DONE 3
715 #define BTRFS_FS_LOG_RECOVERING 4
716 #define BTRFS_FS_OPEN 5
717 #define BTRFS_FS_QUOTA_ENABLED 6
718 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
719 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
720 #define BTRFS_FS_BTREE_ERR 11
721 #define BTRFS_FS_LOG1_ERR 12
722 #define BTRFS_FS_LOG2_ERR 13
723 #define BTRFS_FS_QUOTA_OVERRIDE 14
724 /* Used to record internally whether fs has been frozen */
725 #define BTRFS_FS_FROZEN 15
728 * Indicate that a whole-filesystem exclusive operation is running
729 * (device replace, resize, device add/delete, balance)
731 #define BTRFS_FS_EXCL_OP 16
734 * To info transaction_kthread we need an immediate commit so it doesn't
735 * need to wait for commit_interval
737 #define BTRFS_FS_NEED_ASYNC_COMMIT 17
740 * Indicate that balance has been set up from the ioctl and is in the main
741 * phase. The fs_info::balance_ctl is initialized.
743 #define BTRFS_FS_BALANCE_RUNNING 18
745 struct btrfs_fs_info {
746 u8 fsid[BTRFS_FSID_SIZE];
747 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
749 struct btrfs_root *extent_root;
750 struct btrfs_root *tree_root;
751 struct btrfs_root *chunk_root;
752 struct btrfs_root *dev_root;
753 struct btrfs_root *fs_root;
754 struct btrfs_root *csum_root;
755 struct btrfs_root *quota_root;
756 struct btrfs_root *uuid_root;
757 struct btrfs_root *free_space_root;
759 /* the log root tree is a directory of all the other log roots */
760 struct btrfs_root *log_root_tree;
762 spinlock_t fs_roots_radix_lock;
763 struct radix_tree_root fs_roots_radix;
765 /* block group cache stuff */
766 spinlock_t block_group_cache_lock;
767 u64 first_logical_byte;
768 struct rb_root block_group_cache_tree;
770 /* keep track of unallocated space */
771 atomic64_t free_chunk_space;
773 struct extent_io_tree freed_extents[2];
774 struct extent_io_tree *pinned_extents;
776 /* logical->physical extent mapping */
777 struct btrfs_mapping_tree mapping_tree;
780 * block reservation for extent, checksum, root tree and
781 * delayed dir index item
783 struct btrfs_block_rsv global_block_rsv;
784 /* block reservation for metadata operations */
785 struct btrfs_block_rsv trans_block_rsv;
786 /* block reservation for chunk tree */
787 struct btrfs_block_rsv chunk_block_rsv;
788 /* block reservation for delayed operations */
789 struct btrfs_block_rsv delayed_block_rsv;
791 struct btrfs_block_rsv empty_block_rsv;
794 u64 last_trans_committed;
795 u64 avg_delayed_ref_runtime;
798 * this is updated to the current trans every time a full commit
799 * is required instead of the faster short fsync log commits
801 u64 last_trans_log_full_commit;
802 unsigned long mount_opt;
804 * Track requests for actions that need to be done during transaction
805 * commit (like for some mount options).
807 unsigned long pending_changes;
808 unsigned long compress_type:4;
809 unsigned int compress_level;
812 * It is a suggestive number, the read side is safe even it gets a
813 * wrong number because we will write out the data into a regular
814 * extent. The write side(mount/remount) is under ->s_umount lock,
815 * so it is also safe.
819 struct btrfs_transaction *running_transaction;
820 wait_queue_head_t transaction_throttle;
821 wait_queue_head_t transaction_wait;
822 wait_queue_head_t transaction_blocked_wait;
823 wait_queue_head_t async_submit_wait;
826 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
827 * when they are updated.
829 * Because we do not clear the flags for ever, so we needn't use
830 * the lock on the read side.
832 * We also needn't use the lock when we mount the fs, because
833 * there is no other task which will update the flag.
835 spinlock_t super_lock;
836 struct btrfs_super_block *super_copy;
837 struct btrfs_super_block *super_for_commit;
838 struct super_block *sb;
839 struct inode *btree_inode;
840 struct mutex tree_log_mutex;
841 struct mutex transaction_kthread_mutex;
842 struct mutex cleaner_mutex;
843 struct mutex chunk_mutex;
846 * this is taken to make sure we don't set block groups ro after
847 * the free space cache has been allocated on them
849 struct mutex ro_block_group_mutex;
851 /* this is used during read/modify/write to make sure
852 * no two ios are trying to mod the same stripe at the same
855 struct btrfs_stripe_hash_table *stripe_hash_table;
858 * this protects the ordered operations list only while we are
859 * processing all of the entries on it. This way we make
860 * sure the commit code doesn't find the list temporarily empty
861 * because another function happens to be doing non-waiting preflush
862 * before jumping into the main commit.
864 struct mutex ordered_operations_mutex;
866 struct rw_semaphore commit_root_sem;
868 struct rw_semaphore cleanup_work_sem;
870 struct rw_semaphore subvol_sem;
871 struct srcu_struct subvol_srcu;
873 spinlock_t trans_lock;
875 * the reloc mutex goes with the trans lock, it is taken
876 * during commit to protect us from the relocation code
878 struct mutex reloc_mutex;
880 struct list_head trans_list;
881 struct list_head dead_roots;
882 struct list_head caching_block_groups;
884 spinlock_t delayed_iput_lock;
885 struct list_head delayed_iputs;
886 struct mutex cleaner_delayed_iput_mutex;
888 /* this protects tree_mod_seq_list */
889 spinlock_t tree_mod_seq_lock;
890 atomic64_t tree_mod_seq;
891 struct list_head tree_mod_seq_list;
893 /* this protects tree_mod_log */
894 rwlock_t tree_mod_log_lock;
895 struct rb_root tree_mod_log;
897 atomic_t async_delalloc_pages;
900 * this is used to protect the following list -- ordered_roots.
902 spinlock_t ordered_root_lock;
905 * all fs/file tree roots in which there are data=ordered extents
906 * pending writeback are added into this list.
908 * these can span multiple transactions and basically include
909 * every dirty data page that isn't from nodatacow
911 struct list_head ordered_roots;
913 struct mutex delalloc_root_mutex;
914 spinlock_t delalloc_root_lock;
915 /* all fs/file tree roots that have delalloc inodes. */
916 struct list_head delalloc_roots;
919 * there is a pool of worker threads for checksumming during writes
920 * and a pool for checksumming after reads. This is because readers
921 * can run with FS locks held, and the writers may be waiting for
922 * those locks. We don't want ordering in the pending list to cause
923 * deadlocks, and so the two are serviced separately.
925 * A third pool does submit_bio to avoid deadlocking with the other
928 struct btrfs_workqueue *workers;
929 struct btrfs_workqueue *delalloc_workers;
930 struct btrfs_workqueue *flush_workers;
931 struct btrfs_workqueue *endio_workers;
932 struct btrfs_workqueue *endio_meta_workers;
933 struct btrfs_workqueue *endio_raid56_workers;
934 struct btrfs_workqueue *endio_repair_workers;
935 struct btrfs_workqueue *rmw_workers;
936 struct btrfs_workqueue *endio_meta_write_workers;
937 struct btrfs_workqueue *endio_write_workers;
938 struct btrfs_workqueue *endio_freespace_worker;
939 struct btrfs_workqueue *submit_workers;
940 struct btrfs_workqueue *caching_workers;
941 struct btrfs_workqueue *readahead_workers;
944 * fixup workers take dirty pages that didn't properly go through
945 * the cow mechanism and make them safe to write. It happens
946 * for the sys_munmap function call path
948 struct btrfs_workqueue *fixup_workers;
949 struct btrfs_workqueue *delayed_workers;
951 /* the extent workers do delayed refs on the extent allocation tree */
952 struct btrfs_workqueue *extent_workers;
953 struct task_struct *transaction_kthread;
954 struct task_struct *cleaner_kthread;
955 u32 thread_pool_size;
957 struct kobject *space_info_kobj;
958 struct list_head pending_raid_kobjs;
959 spinlock_t pending_raid_kobjs_lock; /* uncontended */
963 /* used to keep from writing metadata until there is a nice batch */
964 struct percpu_counter dirty_metadata_bytes;
965 struct percpu_counter delalloc_bytes;
966 s32 dirty_metadata_batch;
969 struct list_head dirty_cowonly_roots;
971 struct btrfs_fs_devices *fs_devices;
974 * The space_info list is effectively read only after initial
975 * setup. It is populated at mount time and cleaned up after
976 * all block groups are removed. RCU is used to protect it.
978 struct list_head space_info;
980 struct btrfs_space_info *data_sinfo;
982 struct reloc_control *reloc_ctl;
984 /* data_alloc_cluster is only used in ssd_spread mode */
985 struct btrfs_free_cluster data_alloc_cluster;
987 /* all metadata allocations go through this cluster */
988 struct btrfs_free_cluster meta_alloc_cluster;
990 /* auto defrag inodes go here */
991 spinlock_t defrag_inodes_lock;
992 struct rb_root defrag_inodes;
993 atomic_t defrag_running;
995 /* Used to protect avail_{data, metadata, system}_alloc_bits */
996 seqlock_t profiles_lock;
998 * these three are in extended format (availability of single
999 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1000 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1002 u64 avail_data_alloc_bits;
1003 u64 avail_metadata_alloc_bits;
1004 u64 avail_system_alloc_bits;
1006 /* restriper state */
1007 spinlock_t balance_lock;
1008 struct mutex balance_mutex;
1009 atomic_t balance_pause_req;
1010 atomic_t balance_cancel_req;
1011 struct btrfs_balance_control *balance_ctl;
1012 wait_queue_head_t balance_wait_q;
1014 u32 data_chunk_allocations;
1019 /* private scrub information */
1020 struct mutex scrub_lock;
1021 atomic_t scrubs_running;
1022 atomic_t scrub_pause_req;
1023 atomic_t scrubs_paused;
1024 atomic_t scrub_cancel_req;
1025 wait_queue_head_t scrub_pause_wait;
1026 int scrub_workers_refcnt;
1027 struct btrfs_workqueue *scrub_workers;
1028 struct btrfs_workqueue *scrub_wr_completion_workers;
1029 struct btrfs_workqueue *scrub_nocow_workers;
1030 struct btrfs_workqueue *scrub_parity_workers;
1032 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1033 u32 check_integrity_print_mask;
1035 /* is qgroup tracking in a consistent state? */
1038 /* holds configuration and tracking. Protected by qgroup_lock */
1039 struct rb_root qgroup_tree;
1040 struct rb_root qgroup_op_tree;
1041 spinlock_t qgroup_lock;
1042 spinlock_t qgroup_op_lock;
1043 atomic_t qgroup_op_seq;
1046 * used to avoid frequently calling ulist_alloc()/ulist_free()
1047 * when doing qgroup accounting, it must be protected by qgroup_lock.
1049 struct ulist *qgroup_ulist;
1051 /* protect user change for quota operations */
1052 struct mutex qgroup_ioctl_lock;
1054 /* list of dirty qgroups to be written at next commit */
1055 struct list_head dirty_qgroups;
1057 /* used by qgroup for an efficient tree traversal */
1060 /* qgroup rescan items */
1061 struct mutex qgroup_rescan_lock; /* protects the progress item */
1062 struct btrfs_key qgroup_rescan_progress;
1063 struct btrfs_workqueue *qgroup_rescan_workers;
1064 struct completion qgroup_rescan_completion;
1065 struct btrfs_work qgroup_rescan_work;
1066 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1068 /* filesystem state */
1069 unsigned long fs_state;
1071 struct btrfs_delayed_root *delayed_root;
1073 /* readahead tree */
1074 spinlock_t reada_lock;
1075 struct radix_tree_root reada_tree;
1077 /* readahead works cnt */
1078 atomic_t reada_works_cnt;
1080 /* Extent buffer radix tree */
1081 spinlock_t buffer_lock;
1082 struct radix_tree_root buffer_radix;
1084 /* next backup root to be overwritten */
1085 int backup_root_index;
1087 /* device replace state */
1088 struct btrfs_dev_replace dev_replace;
1090 struct percpu_counter bio_counter;
1091 wait_queue_head_t replace_wait;
1093 struct semaphore uuid_tree_rescan_sem;
1095 /* Used to reclaim the metadata space in the background. */
1096 struct work_struct async_reclaim_work;
1098 spinlock_t unused_bgs_lock;
1099 struct list_head unused_bgs;
1100 struct mutex unused_bg_unpin_mutex;
1101 struct mutex delete_unused_bgs_mutex;
1103 /* For btrfs to record security options */
1104 struct security_mnt_opts security_opts;
1107 * Chunks that can't be freed yet (under a trim/discard operation)
1108 * and will be latter freed. Protected by fs_info->chunk_mutex.
1110 struct list_head pinned_chunks;
1112 /* Cached block sizes */
1117 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1118 spinlock_t ref_verify_lock;
1119 struct rb_root block_tree;
1123 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1125 return sb->s_fs_info;
1128 struct btrfs_subvolume_writers {
1129 struct percpu_counter counter;
1130 wait_queue_head_t wait;
1134 * The state of btrfs root
1137 * btrfs_record_root_in_trans is a multi-step process,
1138 * and it can race with the balancing code. But the
1139 * race is very small, and only the first time the root
1140 * is added to each transaction. So IN_TRANS_SETUP
1141 * is used to tell us when more checks are required
1143 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1144 #define BTRFS_ROOT_REF_COWS 1
1145 #define BTRFS_ROOT_TRACK_DIRTY 2
1146 #define BTRFS_ROOT_IN_RADIX 3
1147 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1148 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1149 #define BTRFS_ROOT_FORCE_COW 6
1150 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1151 #define BTRFS_ROOT_DIRTY 8
1154 * in ram representation of the tree. extent_root is used for all allocations
1155 * and for the extent tree extent_root root.
1158 struct extent_buffer *node;
1160 struct extent_buffer *commit_root;
1161 struct btrfs_root *log_root;
1162 struct btrfs_root *reloc_root;
1164 unsigned long state;
1165 struct btrfs_root_item root_item;
1166 struct btrfs_key root_key;
1167 struct btrfs_fs_info *fs_info;
1168 struct extent_io_tree dirty_log_pages;
1170 struct mutex objectid_mutex;
1172 spinlock_t accounting_lock;
1173 struct btrfs_block_rsv *block_rsv;
1175 /* free ino cache stuff */
1176 struct btrfs_free_space_ctl *free_ino_ctl;
1177 enum btrfs_caching_type ino_cache_state;
1178 spinlock_t ino_cache_lock;
1179 wait_queue_head_t ino_cache_wait;
1180 struct btrfs_free_space_ctl *free_ino_pinned;
1181 u64 ino_cache_progress;
1182 struct inode *ino_cache_inode;
1184 struct mutex log_mutex;
1185 wait_queue_head_t log_writer_wait;
1186 wait_queue_head_t log_commit_wait[2];
1187 struct list_head log_ctxs[2];
1188 atomic_t log_writers;
1189 atomic_t log_commit[2];
1192 /* No matter the commit succeeds or not*/
1193 int log_transid_committed;
1194 /* Just be updated when the commit succeeds. */
1195 int last_log_commit;
1196 pid_t log_start_pid;
1202 u64 highest_objectid;
1204 u64 defrag_trans_start;
1205 struct btrfs_key defrag_progress;
1206 struct btrfs_key defrag_max;
1208 /* the dirty list is only used by non-reference counted roots */
1209 struct list_head dirty_list;
1211 struct list_head root_list;
1213 spinlock_t log_extents_lock[2];
1214 struct list_head logged_list[2];
1216 int orphan_cleanup_state;
1218 spinlock_t inode_lock;
1219 /* red-black tree that keeps track of in-memory inodes */
1220 struct rb_root inode_tree;
1223 * radix tree that keeps track of delayed nodes of every inode,
1224 * protected by inode_lock
1226 struct radix_tree_root delayed_nodes_tree;
1228 * right now this just gets used so that a root has its own devid
1229 * for stat. It may be used for more later
1233 spinlock_t root_item_lock;
1236 struct mutex delalloc_mutex;
1237 spinlock_t delalloc_lock;
1239 * all of the inodes that have delalloc bytes. It is possible for
1240 * this list to be empty even when there is still dirty data=ordered
1241 * extents waiting to finish IO.
1243 struct list_head delalloc_inodes;
1244 struct list_head delalloc_root;
1245 u64 nr_delalloc_inodes;
1247 struct mutex ordered_extent_mutex;
1249 * this is used by the balancing code to wait for all the pending
1252 spinlock_t ordered_extent_lock;
1255 * all of the data=ordered extents pending writeback
1256 * these can span multiple transactions and basically include
1257 * every dirty data page that isn't from nodatacow
1259 struct list_head ordered_extents;
1260 struct list_head ordered_root;
1261 u64 nr_ordered_extents;
1264 * Number of currently running SEND ioctls to prevent
1265 * manipulation with the read-only status via SUBVOL_SETFLAGS
1267 int send_in_progress;
1268 struct btrfs_subvolume_writers *subv_writers;
1269 atomic_t will_be_snapshotted;
1270 atomic_t snapshot_force_cow;
1272 /* For qgroup metadata reserved space */
1273 spinlock_t qgroup_meta_rsv_lock;
1274 u64 qgroup_meta_rsv_pertrans;
1275 u64 qgroup_meta_rsv_prealloc;
1277 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1282 struct btrfs_file_private {
1286 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1288 return btrfs_sb(inode->i_sb)->sectorsize;
1291 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1294 return info->nodesize - sizeof(struct btrfs_header);
1297 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1299 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1301 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1304 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1306 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1309 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1310 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1311 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1313 return BTRFS_MAX_ITEM_SIZE(info) -
1314 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1317 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1319 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1323 * Flags for mount options.
1325 * Note: don't forget to add new options to btrfs_show_options()
1327 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1328 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1329 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1330 #define BTRFS_MOUNT_SSD (1 << 3)
1331 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1332 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1333 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1334 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1335 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1336 #define BTRFS_MOUNT_NOSSD (1 << 9)
1337 #define BTRFS_MOUNT_DISCARD (1 << 10)
1338 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1339 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1340 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1341 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1342 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1343 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1344 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1345 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1346 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1347 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1348 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1349 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1350 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1351 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1352 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1353 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1354 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1355 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1357 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1358 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1360 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1361 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1362 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1363 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1366 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1368 if (!btrfs_test_opt(fs_info, opt)) \
1369 btrfs_info(fs_info, fmt, ##args); \
1370 btrfs_set_opt(fs_info->mount_opt, opt); \
1373 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1375 if (btrfs_test_opt(fs_info, opt)) \
1376 btrfs_info(fs_info, fmt, ##args); \
1377 btrfs_clear_opt(fs_info->mount_opt, opt); \
1380 #ifdef CONFIG_BTRFS_DEBUG
1382 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1384 struct btrfs_fs_info *fs_info = block_group->fs_info;
1386 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1387 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1388 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1389 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1394 * Requests for changes that need to be done during transaction commit.
1396 * Internal mount options that are used for special handling of the real
1397 * mount options (eg. cannot be set during remount and have to be set during
1398 * transaction commit)
1401 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1402 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1403 #define BTRFS_PENDING_COMMIT (2)
1405 #define btrfs_test_pending(info, opt) \
1406 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1407 #define btrfs_set_pending(info, opt) \
1408 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1409 #define btrfs_clear_pending(info, opt) \
1410 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1413 * Helpers for setting pending mount option changes.
1415 * Expects corresponding macros
1416 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1418 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1420 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1421 btrfs_info((info), fmt, ##args); \
1422 btrfs_set_pending((info), SET_##opt); \
1423 btrfs_clear_pending((info), CLEAR_##opt); \
1427 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1429 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1430 btrfs_info((info), fmt, ##args); \
1431 btrfs_set_pending((info), CLEAR_##opt); \
1432 btrfs_clear_pending((info), SET_##opt); \
1439 #define BTRFS_INODE_NODATASUM (1 << 0)
1440 #define BTRFS_INODE_NODATACOW (1 << 1)
1441 #define BTRFS_INODE_READONLY (1 << 2)
1442 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1443 #define BTRFS_INODE_PREALLOC (1 << 4)
1444 #define BTRFS_INODE_SYNC (1 << 5)
1445 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1446 #define BTRFS_INODE_APPEND (1 << 7)
1447 #define BTRFS_INODE_NODUMP (1 << 8)
1448 #define BTRFS_INODE_NOATIME (1 << 9)
1449 #define BTRFS_INODE_DIRSYNC (1 << 10)
1450 #define BTRFS_INODE_COMPRESS (1 << 11)
1452 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1454 struct btrfs_map_token {
1455 const struct extent_buffer *eb;
1457 unsigned long offset;
1460 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1461 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1463 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1465 token->kaddr = NULL;
1468 /* some macros to generate set/get functions for the struct fields. This
1469 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1472 #define le8_to_cpu(v) (v)
1473 #define cpu_to_le8(v) (v)
1476 #define read_eb_member(eb, ptr, type, member, result) (\
1477 read_extent_buffer(eb, (char *)(result), \
1478 ((unsigned long)(ptr)) + \
1479 offsetof(type, member), \
1480 sizeof(((type *)0)->member)))
1482 #define write_eb_member(eb, ptr, type, member, result) (\
1483 write_extent_buffer(eb, (char *)(result), \
1484 ((unsigned long)(ptr)) + \
1485 offsetof(type, member), \
1486 sizeof(((type *)0)->member)))
1488 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1489 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1490 const void *ptr, unsigned long off, \
1491 struct btrfs_map_token *token); \
1492 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1493 unsigned long off, u##bits val, \
1494 struct btrfs_map_token *token); \
1495 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1497 unsigned long off) \
1499 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1501 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1502 unsigned long off, u##bits val) \
1504 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1507 DECLARE_BTRFS_SETGET_BITS(8)
1508 DECLARE_BTRFS_SETGET_BITS(16)
1509 DECLARE_BTRFS_SETGET_BITS(32)
1510 DECLARE_BTRFS_SETGET_BITS(64)
1512 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1513 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1516 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1517 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1519 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1522 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1523 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1525 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1527 struct btrfs_map_token *token) \
1529 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1530 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1532 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1533 type *s, u##bits val, \
1534 struct btrfs_map_token *token) \
1536 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1537 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1540 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1541 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1543 const type *p = page_address(eb->pages[0]); \
1544 u##bits res = le##bits##_to_cpu(p->member); \
1547 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1550 type *p = page_address(eb->pages[0]); \
1551 p->member = cpu_to_le##bits(val); \
1554 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1555 static inline u##bits btrfs_##name(const type *s) \
1557 return le##bits##_to_cpu(s->member); \
1559 static inline void btrfs_set_##name(type *s, u##bits val) \
1561 s->member = cpu_to_le##bits(val); \
1565 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1566 struct btrfs_dev_item *s)
1568 BUILD_BUG_ON(sizeof(u64) !=
1569 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1570 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1573 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1574 struct btrfs_dev_item *s,
1577 BUILD_BUG_ON(sizeof(u64) !=
1578 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1579 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1580 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1584 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1585 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1586 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1587 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1588 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1590 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1591 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1592 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1593 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1594 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1595 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1597 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1598 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1600 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1602 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1604 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1606 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1608 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1609 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1611 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1613 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1615 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1618 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1620 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1623 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1625 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1628 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1629 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1630 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1631 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1632 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1633 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1634 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1635 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1636 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1637 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1638 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1640 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1642 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1645 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1646 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1647 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1649 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1651 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1656 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1658 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1660 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1661 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1663 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1666 unsigned long offset = (unsigned long)c;
1667 offset += offsetof(struct btrfs_chunk, stripe);
1668 offset += nr * sizeof(struct btrfs_stripe);
1669 return (struct btrfs_stripe *)offset;
1672 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1674 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1677 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1678 struct btrfs_chunk *c, int nr)
1680 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1683 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1684 struct btrfs_chunk *c, int nr)
1686 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1689 /* struct btrfs_block_group_item */
1690 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1692 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1694 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1695 struct btrfs_block_group_item, chunk_objectid, 64);
1697 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1698 struct btrfs_block_group_item, chunk_objectid, 64);
1699 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1700 struct btrfs_block_group_item, flags, 64);
1701 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1702 struct btrfs_block_group_item, flags, 64);
1704 /* struct btrfs_free_space_info */
1705 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1707 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1709 /* struct btrfs_inode_ref */
1710 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1711 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1713 /* struct btrfs_inode_extref */
1714 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1715 parent_objectid, 64);
1716 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1718 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1720 /* struct btrfs_inode_item */
1721 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1722 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1723 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1724 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1725 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1726 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1727 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1728 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1729 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1730 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1731 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1732 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1733 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1735 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1737 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1739 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1740 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1742 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1744 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1746 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1750 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1751 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1752 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1753 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1755 /* struct btrfs_dev_extent */
1756 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1758 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1759 chunk_objectid, 64);
1760 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1762 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1764 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1766 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1767 return (unsigned long)dev + ptr;
1770 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1771 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1773 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1775 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1778 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1780 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1781 struct btrfs_tree_block_info *item,
1782 struct btrfs_disk_key *key)
1784 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1787 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1788 struct btrfs_tree_block_info *item,
1789 struct btrfs_disk_key *key)
1791 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1794 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1796 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1798 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1800 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1803 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1806 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1808 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1811 static inline u32 btrfs_extent_inline_ref_size(int type)
1813 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1814 type == BTRFS_SHARED_BLOCK_REF_KEY)
1815 return sizeof(struct btrfs_extent_inline_ref);
1816 if (type == BTRFS_SHARED_DATA_REF_KEY)
1817 return sizeof(struct btrfs_shared_data_ref) +
1818 sizeof(struct btrfs_extent_inline_ref);
1819 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1820 return sizeof(struct btrfs_extent_data_ref) +
1821 offsetof(struct btrfs_extent_inline_ref, offset);
1825 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1826 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1828 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1829 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1831 /* struct btrfs_node */
1832 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1833 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1834 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1836 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1839 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1842 ptr = offsetof(struct btrfs_node, ptrs) +
1843 sizeof(struct btrfs_key_ptr) * nr;
1844 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1847 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1851 ptr = offsetof(struct btrfs_node, ptrs) +
1852 sizeof(struct btrfs_key_ptr) * nr;
1853 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1856 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1859 ptr = offsetof(struct btrfs_node, ptrs) +
1860 sizeof(struct btrfs_key_ptr) * nr;
1861 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1864 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1868 ptr = offsetof(struct btrfs_node, ptrs) +
1869 sizeof(struct btrfs_key_ptr) * nr;
1870 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1873 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1875 return offsetof(struct btrfs_node, ptrs) +
1876 sizeof(struct btrfs_key_ptr) * nr;
1879 void btrfs_node_key(const struct extent_buffer *eb,
1880 struct btrfs_disk_key *disk_key, int nr);
1882 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1883 struct btrfs_disk_key *disk_key, int nr)
1886 ptr = btrfs_node_key_ptr_offset(nr);
1887 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1888 struct btrfs_key_ptr, key, disk_key);
1891 /* struct btrfs_item */
1892 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1893 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1894 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1895 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1897 static inline unsigned long btrfs_item_nr_offset(int nr)
1899 return offsetof(struct btrfs_leaf, items) +
1900 sizeof(struct btrfs_item) * nr;
1903 static inline struct btrfs_item *btrfs_item_nr(int nr)
1905 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1908 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1909 struct btrfs_item *item)
1911 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1914 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1916 return btrfs_item_end(eb, btrfs_item_nr(nr));
1919 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1921 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1924 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1926 return btrfs_item_size(eb, btrfs_item_nr(nr));
1929 static inline void btrfs_item_key(const struct extent_buffer *eb,
1930 struct btrfs_disk_key *disk_key, int nr)
1932 struct btrfs_item *item = btrfs_item_nr(nr);
1933 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1936 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1937 struct btrfs_disk_key *disk_key, int nr)
1939 struct btrfs_item *item = btrfs_item_nr(nr);
1940 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1943 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1946 * struct btrfs_root_ref
1948 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1949 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1950 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1952 /* struct btrfs_dir_item */
1953 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1954 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1955 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1956 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1957 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1958 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1960 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1962 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1965 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1966 const struct btrfs_dir_item *item,
1967 struct btrfs_disk_key *key)
1969 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1972 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1973 struct btrfs_dir_item *item,
1974 const struct btrfs_disk_key *key)
1976 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1979 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1981 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1983 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1986 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1987 const struct btrfs_free_space_header *h,
1988 struct btrfs_disk_key *key)
1990 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1993 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1994 struct btrfs_free_space_header *h,
1995 const struct btrfs_disk_key *key)
1997 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2000 /* struct btrfs_disk_key */
2001 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2003 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2004 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2006 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2007 const struct btrfs_disk_key *disk)
2009 cpu->offset = le64_to_cpu(disk->offset);
2010 cpu->type = disk->type;
2011 cpu->objectid = le64_to_cpu(disk->objectid);
2014 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2015 const struct btrfs_key *cpu)
2017 disk->offset = cpu_to_le64(cpu->offset);
2018 disk->type = cpu->type;
2019 disk->objectid = cpu_to_le64(cpu->objectid);
2022 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2023 struct btrfs_key *key, int nr)
2025 struct btrfs_disk_key disk_key;
2026 btrfs_node_key(eb, &disk_key, nr);
2027 btrfs_disk_key_to_cpu(key, &disk_key);
2030 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2031 struct btrfs_key *key, int nr)
2033 struct btrfs_disk_key disk_key;
2034 btrfs_item_key(eb, &disk_key, nr);
2035 btrfs_disk_key_to_cpu(key, &disk_key);
2038 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2039 const struct btrfs_dir_item *item,
2040 struct btrfs_key *key)
2042 struct btrfs_disk_key disk_key;
2043 btrfs_dir_item_key(eb, item, &disk_key);
2044 btrfs_disk_key_to_cpu(key, &disk_key);
2047 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2052 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2057 /* struct btrfs_header */
2058 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2059 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2061 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2062 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2063 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2064 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2065 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2067 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2068 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2070 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2072 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2074 return (btrfs_header_flags(eb) & flag) == flag;
2077 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2079 u64 flags = btrfs_header_flags(eb);
2080 btrfs_set_header_flags(eb, flags | flag);
2081 return (flags & flag) == flag;
2084 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2086 u64 flags = btrfs_header_flags(eb);
2087 btrfs_set_header_flags(eb, flags & ~flag);
2088 return (flags & flag) == flag;
2091 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2093 u64 flags = btrfs_header_flags(eb);
2094 return flags >> BTRFS_BACKREF_REV_SHIFT;
2097 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2100 u64 flags = btrfs_header_flags(eb);
2101 flags &= ~BTRFS_BACKREF_REV_MASK;
2102 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2103 btrfs_set_header_flags(eb, flags);
2106 static inline unsigned long btrfs_header_fsid(void)
2108 return offsetof(struct btrfs_header, fsid);
2111 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2113 return offsetof(struct btrfs_header, chunk_tree_uuid);
2116 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2118 return btrfs_header_level(eb) == 0;
2121 /* struct btrfs_root_item */
2122 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2124 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2125 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2126 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2128 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2130 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2131 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2132 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2133 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2134 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2135 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2136 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2137 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2139 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2141 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2143 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2145 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2147 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2150 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2152 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2155 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2157 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2160 /* struct btrfs_root_backup */
2161 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2163 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2165 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2166 tree_root_level, 8);
2168 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2170 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2171 chunk_root_gen, 64);
2172 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2173 chunk_root_level, 8);
2175 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2177 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2178 extent_root_gen, 64);
2179 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2180 extent_root_level, 8);
2182 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2184 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2186 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2189 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2191 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2193 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2196 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2198 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2200 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2201 csum_root_level, 8);
2202 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2204 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2206 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2209 /* struct btrfs_balance_item */
2210 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2212 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2213 const struct btrfs_balance_item *bi,
2214 struct btrfs_disk_balance_args *ba)
2216 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2219 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2220 struct btrfs_balance_item *bi,
2221 const struct btrfs_disk_balance_args *ba)
2223 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2226 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2227 const struct btrfs_balance_item *bi,
2228 struct btrfs_disk_balance_args *ba)
2230 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2233 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2234 struct btrfs_balance_item *bi,
2235 const struct btrfs_disk_balance_args *ba)
2237 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2240 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2241 const struct btrfs_balance_item *bi,
2242 struct btrfs_disk_balance_args *ba)
2244 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2247 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2248 struct btrfs_balance_item *bi,
2249 const struct btrfs_disk_balance_args *ba)
2251 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2255 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2256 const struct btrfs_disk_balance_args *disk)
2258 memset(cpu, 0, sizeof(*cpu));
2260 cpu->profiles = le64_to_cpu(disk->profiles);
2261 cpu->usage = le64_to_cpu(disk->usage);
2262 cpu->devid = le64_to_cpu(disk->devid);
2263 cpu->pstart = le64_to_cpu(disk->pstart);
2264 cpu->pend = le64_to_cpu(disk->pend);
2265 cpu->vstart = le64_to_cpu(disk->vstart);
2266 cpu->vend = le64_to_cpu(disk->vend);
2267 cpu->target = le64_to_cpu(disk->target);
2268 cpu->flags = le64_to_cpu(disk->flags);
2269 cpu->limit = le64_to_cpu(disk->limit);
2270 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2271 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2275 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2276 const struct btrfs_balance_args *cpu)
2278 memset(disk, 0, sizeof(*disk));
2280 disk->profiles = cpu_to_le64(cpu->profiles);
2281 disk->usage = cpu_to_le64(cpu->usage);
2282 disk->devid = cpu_to_le64(cpu->devid);
2283 disk->pstart = cpu_to_le64(cpu->pstart);
2284 disk->pend = cpu_to_le64(cpu->pend);
2285 disk->vstart = cpu_to_le64(cpu->vstart);
2286 disk->vend = cpu_to_le64(cpu->vend);
2287 disk->target = cpu_to_le64(cpu->target);
2288 disk->flags = cpu_to_le64(cpu->flags);
2289 disk->limit = cpu_to_le64(cpu->limit);
2290 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2291 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2294 /* struct btrfs_super_block */
2295 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2296 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2297 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2299 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2300 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2301 struct btrfs_super_block, sys_chunk_array_size, 32);
2302 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2303 struct btrfs_super_block, chunk_root_generation, 64);
2304 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2306 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2308 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2309 chunk_root_level, 8);
2310 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2312 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2313 log_root_transid, 64);
2314 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2316 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2318 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2320 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2322 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2324 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2326 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2327 root_dir_objectid, 64);
2328 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2330 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2332 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2333 compat_ro_flags, 64);
2334 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2335 incompat_flags, 64);
2336 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2338 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2339 cache_generation, 64);
2340 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2341 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2342 uuid_tree_generation, 64);
2344 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2346 u16 t = btrfs_super_csum_type(s);
2348 * csum type is validated at mount time
2350 return btrfs_csum_sizes[t];
2355 * The leaf data grows from end-to-front in the node.
2356 * this returns the address of the start of the last item,
2357 * which is the stop of the leaf data stack
2359 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2360 const struct extent_buffer *leaf)
2362 u32 nr = btrfs_header_nritems(leaf);
2365 return BTRFS_LEAF_DATA_SIZE(fs_info);
2366 return btrfs_item_offset_nr(leaf, nr - 1);
2369 /* struct btrfs_file_extent_item */
2370 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2371 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2372 struct btrfs_file_extent_item, disk_bytenr, 64);
2373 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2374 struct btrfs_file_extent_item, offset, 64);
2375 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2376 struct btrfs_file_extent_item, generation, 64);
2377 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2378 struct btrfs_file_extent_item, num_bytes, 64);
2379 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2380 struct btrfs_file_extent_item, disk_num_bytes, 64);
2381 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2382 struct btrfs_file_extent_item, compression, 8);
2384 static inline unsigned long
2385 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2387 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2390 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2392 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2395 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2397 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2399 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2400 disk_num_bytes, 64);
2401 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2403 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2405 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2407 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2409 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2411 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2412 other_encoding, 16);
2415 * this returns the number of bytes used by the item on disk, minus the
2416 * size of any extent headers. If a file is compressed on disk, this is
2417 * the compressed size
2419 static inline u32 btrfs_file_extent_inline_item_len(
2420 const struct extent_buffer *eb,
2421 struct btrfs_item *e)
2423 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2426 /* btrfs_dev_stats_item */
2427 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2428 const struct btrfs_dev_stats_item *ptr,
2433 read_extent_buffer(eb, &val,
2434 offsetof(struct btrfs_dev_stats_item, values) +
2435 ((unsigned long)ptr) + (index * sizeof(u64)),
2440 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2441 struct btrfs_dev_stats_item *ptr,
2444 write_extent_buffer(eb, &val,
2445 offsetof(struct btrfs_dev_stats_item, values) +
2446 ((unsigned long)ptr) + (index * sizeof(u64)),
2450 /* btrfs_qgroup_status_item */
2451 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2453 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2455 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2457 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2460 /* btrfs_qgroup_info_item */
2461 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2463 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2464 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2466 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2467 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2470 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2471 struct btrfs_qgroup_info_item, generation, 64);
2472 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2474 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2475 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2476 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2478 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2479 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2481 /* btrfs_qgroup_limit_item */
2482 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2484 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2486 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2488 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2490 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2493 /* btrfs_dev_replace_item */
2494 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2495 struct btrfs_dev_replace_item, src_devid, 64);
2496 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2497 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2499 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2501 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2503 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2505 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2506 num_write_errors, 64);
2507 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2508 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2510 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2512 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2515 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2516 struct btrfs_dev_replace_item, src_devid, 64);
2517 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2518 struct btrfs_dev_replace_item,
2519 cont_reading_from_srcdev_mode, 64);
2520 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2521 struct btrfs_dev_replace_item, replace_state, 64);
2522 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2523 struct btrfs_dev_replace_item, time_started, 64);
2524 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2525 struct btrfs_dev_replace_item, time_stopped, 64);
2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2527 struct btrfs_dev_replace_item, num_write_errors, 64);
2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2529 struct btrfs_dev_replace_item,
2530 num_uncorrectable_read_errors, 64);
2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2532 struct btrfs_dev_replace_item, cursor_left, 64);
2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2534 struct btrfs_dev_replace_item, cursor_right, 64);
2536 /* helper function to cast into the data area of the leaf. */
2537 #define btrfs_item_ptr(leaf, slot, type) \
2538 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2539 btrfs_item_offset_nr(leaf, slot)))
2541 #define btrfs_item_ptr_offset(leaf, slot) \
2542 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2543 btrfs_item_offset_nr(leaf, slot)))
2545 static inline u64 btrfs_name_hash(const char *name, int len)
2547 return crc32c((u32)~1, name, len);
2551 * Figure the key offset of an extended inode ref
2553 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2556 return (u64) crc32c(parent_objectid, name, len);
2559 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2561 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2562 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2565 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2567 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2572 enum btrfs_inline_ref_type {
2573 BTRFS_REF_TYPE_INVALID = 0,
2574 BTRFS_REF_TYPE_BLOCK = 1,
2575 BTRFS_REF_TYPE_DATA = 2,
2576 BTRFS_REF_TYPE_ANY = 3,
2579 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2580 struct btrfs_extent_inline_ref *iref,
2581 enum btrfs_inline_ref_type is_data);
2583 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2585 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2588 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2592 * Doing a truncate won't result in new nodes or leaves, just what we need for
2595 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2598 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2601 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2602 struct btrfs_fs_info *fs_info);
2603 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2604 struct btrfs_fs_info *fs_info);
2605 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2607 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2608 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2609 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2610 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2611 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2612 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2613 unsigned long count);
2614 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2615 unsigned long count, u64 transid, int wait);
2616 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2617 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2618 struct btrfs_fs_info *fs_info, u64 bytenr,
2619 u64 offset, int metadata, u64 *refs, u64 *flags);
2620 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2621 u64 bytenr, u64 num, int reserved);
2622 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2623 u64 bytenr, u64 num_bytes);
2624 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2625 struct extent_buffer *eb);
2626 int btrfs_cross_ref_exist(struct btrfs_root *root,
2627 u64 objectid, u64 offset, u64 bytenr);
2628 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2629 struct btrfs_fs_info *info,
2631 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2632 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2633 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2634 struct btrfs_root *root,
2635 u64 parent, u64 root_objectid,
2636 const struct btrfs_disk_key *key,
2637 int level, u64 hint,
2639 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2640 struct btrfs_root *root,
2641 struct extent_buffer *buf,
2642 u64 parent, int last_ref);
2643 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2644 struct btrfs_root *root, u64 owner,
2645 u64 offset, u64 ram_bytes,
2646 struct btrfs_key *ins);
2647 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2648 u64 root_objectid, u64 owner, u64 offset,
2649 struct btrfs_key *ins);
2650 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2651 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2652 struct btrfs_key *ins, int is_data, int delalloc);
2653 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2654 struct extent_buffer *buf, int full_backref);
2655 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2656 struct extent_buffer *buf, int full_backref);
2657 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2658 struct btrfs_fs_info *fs_info,
2659 u64 bytenr, u64 num_bytes, u64 flags,
2660 int level, int is_data);
2661 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2662 struct btrfs_root *root,
2663 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2664 u64 owner, u64 offset);
2666 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2667 u64 start, u64 len, int delalloc);
2668 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2669 u64 start, u64 len);
2670 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2671 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2672 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2673 struct btrfs_root *root,
2674 u64 bytenr, u64 num_bytes, u64 parent,
2675 u64 root_objectid, u64 owner, u64 offset);
2677 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2678 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2679 struct btrfs_fs_info *fs_info);
2680 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2681 struct btrfs_fs_info *fs_info);
2682 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2683 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2684 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2685 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2686 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2687 u64 bytes_used, u64 type, u64 chunk_offset,
2689 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2690 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2691 struct btrfs_fs_info *fs_info,
2692 const u64 chunk_offset);
2693 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2694 u64 group_start, struct extent_map *em);
2695 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2696 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2697 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2698 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2699 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2700 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2701 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2702 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2704 enum btrfs_reserve_flush_enum {
2705 /* If we are in the transaction, we can't flush anything.*/
2706 BTRFS_RESERVE_NO_FLUSH,
2708 * Flushing delalloc may cause deadlock somewhere, in this
2709 * case, use FLUSH LIMIT
2711 BTRFS_RESERVE_FLUSH_LIMIT,
2712 BTRFS_RESERVE_FLUSH_ALL,
2715 enum btrfs_flush_state {
2716 FLUSH_DELAYED_ITEMS_NR = 1,
2717 FLUSH_DELAYED_ITEMS = 2,
2719 FLUSH_DELALLOC_WAIT = 4,
2724 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2725 int btrfs_check_data_free_space(struct inode *inode,
2726 struct extent_changeset **reserved, u64 start, u64 len);
2727 void btrfs_free_reserved_data_space(struct inode *inode,
2728 struct extent_changeset *reserved, u64 start, u64 len);
2729 void btrfs_delalloc_release_space(struct inode *inode,
2730 struct extent_changeset *reserved,
2731 u64 start, u64 len, bool qgroup_free);
2732 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2734 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2735 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2736 struct btrfs_block_rsv *rsv,
2737 int nitems, bool use_global_rsv);
2738 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2739 struct btrfs_block_rsv *rsv);
2740 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2743 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2744 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2746 int btrfs_delalloc_reserve_space(struct inode *inode,
2747 struct extent_changeset **reserved, u64 start, u64 len);
2748 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2749 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2750 unsigned short type);
2751 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2752 struct btrfs_block_rsv *rsv,
2753 unsigned short type);
2754 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2755 struct btrfs_block_rsv *rsv);
2756 int btrfs_block_rsv_add(struct btrfs_root *root,
2757 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2758 enum btrfs_reserve_flush_enum flush);
2759 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2760 int btrfs_block_rsv_refill(struct btrfs_root *root,
2761 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2762 enum btrfs_reserve_flush_enum flush);
2763 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2764 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2766 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2767 struct btrfs_block_rsv *dest, u64 num_bytes,
2769 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2770 struct btrfs_block_rsv *block_rsv,
2772 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2773 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2774 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2775 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2776 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2777 u64 start, u64 end);
2778 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2779 u64 num_bytes, u64 *actual_bytes);
2780 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2781 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2783 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2784 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2785 struct btrfs_fs_info *fs_info);
2786 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2787 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2788 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2789 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2790 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2791 u64 start, u64 end);
2792 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2795 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2796 int level, int *slot);
2797 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2798 int btrfs_previous_item(struct btrfs_root *root,
2799 struct btrfs_path *path, u64 min_objectid,
2801 int btrfs_previous_extent_item(struct btrfs_root *root,
2802 struct btrfs_path *path, u64 min_objectid);
2803 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2804 struct btrfs_path *path,
2805 const struct btrfs_key *new_key);
2806 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2807 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2808 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2809 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2810 struct btrfs_key *key, int lowest_level,
2812 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2813 struct btrfs_path *path,
2815 enum btrfs_compare_tree_result {
2816 BTRFS_COMPARE_TREE_NEW,
2817 BTRFS_COMPARE_TREE_DELETED,
2818 BTRFS_COMPARE_TREE_CHANGED,
2819 BTRFS_COMPARE_TREE_SAME,
2821 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2822 struct btrfs_path *right_path,
2823 struct btrfs_key *key,
2824 enum btrfs_compare_tree_result result,
2826 int btrfs_compare_trees(struct btrfs_root *left_root,
2827 struct btrfs_root *right_root,
2828 btrfs_changed_cb_t cb, void *ctx);
2829 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2830 struct btrfs_root *root, struct extent_buffer *buf,
2831 struct extent_buffer *parent, int parent_slot,
2832 struct extent_buffer **cow_ret);
2833 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2834 struct btrfs_root *root,
2835 struct extent_buffer *buf,
2836 struct extent_buffer **cow_ret, u64 new_root_objectid);
2837 int btrfs_block_can_be_shared(struct btrfs_root *root,
2838 struct extent_buffer *buf);
2839 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2841 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2842 struct btrfs_path *path, u32 new_size, int from_end);
2843 int btrfs_split_item(struct btrfs_trans_handle *trans,
2844 struct btrfs_root *root,
2845 struct btrfs_path *path,
2846 const struct btrfs_key *new_key,
2847 unsigned long split_offset);
2848 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2849 struct btrfs_root *root,
2850 struct btrfs_path *path,
2851 const struct btrfs_key *new_key);
2852 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2853 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2854 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2855 const struct btrfs_key *key, struct btrfs_path *p,
2856 int ins_len, int cow);
2857 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2858 struct btrfs_path *p, u64 time_seq);
2859 int btrfs_search_slot_for_read(struct btrfs_root *root,
2860 const struct btrfs_key *key,
2861 struct btrfs_path *p, int find_higher,
2863 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2864 struct btrfs_root *root, struct extent_buffer *parent,
2865 int start_slot, u64 *last_ret,
2866 struct btrfs_key *progress);
2867 void btrfs_release_path(struct btrfs_path *p);
2868 struct btrfs_path *btrfs_alloc_path(void);
2869 void btrfs_free_path(struct btrfs_path *p);
2870 void btrfs_set_path_blocking(struct btrfs_path *p);
2871 void btrfs_clear_path_blocking(struct btrfs_path *p,
2872 struct extent_buffer *held, int held_rw);
2873 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2875 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2876 struct btrfs_path *path, int slot, int nr);
2877 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2878 struct btrfs_root *root,
2879 struct btrfs_path *path)
2881 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2884 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2885 const struct btrfs_key *cpu_key, u32 *data_size,
2886 u32 total_data, u32 total_size, int nr);
2887 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2888 const struct btrfs_key *key, void *data, u32 data_size);
2889 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2890 struct btrfs_root *root,
2891 struct btrfs_path *path,
2892 const struct btrfs_key *cpu_key, u32 *data_size,
2895 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2896 struct btrfs_root *root,
2897 struct btrfs_path *path,
2898 const struct btrfs_key *key,
2901 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2904 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2905 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2906 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2908 static inline int btrfs_next_old_item(struct btrfs_root *root,
2909 struct btrfs_path *p, u64 time_seq)
2912 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2913 return btrfs_next_old_leaf(root, p, time_seq);
2916 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2918 return btrfs_next_old_item(root, p, 0);
2920 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2921 struct extent_buffer *leaf);
2922 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2923 struct btrfs_block_rsv *block_rsv,
2924 int update_ref, int for_reloc);
2925 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2926 struct btrfs_root *root,
2927 struct extent_buffer *node,
2928 struct extent_buffer *parent);
2929 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2932 * Do it this way so we only ever do one test_bit in the normal case.
2934 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2935 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2943 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2944 * anything except sleeping. This function is used to check the status of
2947 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2949 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2952 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2954 kfree(fs_info->balance_ctl);
2955 kfree(fs_info->delayed_root);
2956 kfree(fs_info->extent_root);
2957 kfree(fs_info->tree_root);
2958 kfree(fs_info->chunk_root);
2959 kfree(fs_info->dev_root);
2960 kfree(fs_info->csum_root);
2961 kfree(fs_info->quota_root);
2962 kfree(fs_info->uuid_root);
2963 kfree(fs_info->free_space_root);
2964 kfree(fs_info->super_copy);
2965 kfree(fs_info->super_for_commit);
2966 security_free_mnt_opts(&fs_info->security_opts);
2970 /* tree mod log functions from ctree.c */
2971 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2972 struct seq_list *elem);
2973 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2974 struct seq_list *elem);
2975 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2978 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2979 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2981 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2982 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2984 int btrfs_del_root(struct btrfs_trans_handle *trans,
2985 const struct btrfs_key *key);
2986 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2987 const struct btrfs_key *key,
2988 struct btrfs_root_item *item);
2989 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2990 struct btrfs_root *root,
2991 struct btrfs_key *key,
2992 struct btrfs_root_item *item);
2993 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2994 struct btrfs_path *path, struct btrfs_root_item *root_item,
2995 struct btrfs_key *root_key);
2996 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2997 void btrfs_set_root_node(struct btrfs_root_item *item,
2998 struct extent_buffer *node);
2999 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3000 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3001 struct btrfs_root *root);
3004 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3006 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3008 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3009 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3013 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3014 const char *name, int name_len);
3015 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3016 int name_len, struct btrfs_inode *dir,
3017 struct btrfs_key *location, u8 type, u64 index);
3018 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3019 struct btrfs_root *root,
3020 struct btrfs_path *path, u64 dir,
3021 const char *name, int name_len,
3023 struct btrfs_dir_item *
3024 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3025 struct btrfs_root *root,
3026 struct btrfs_path *path, u64 dir,
3027 u64 objectid, const char *name, int name_len,
3029 struct btrfs_dir_item *
3030 btrfs_search_dir_index_item(struct btrfs_root *root,
3031 struct btrfs_path *path, u64 dirid,
3032 const char *name, int name_len);
3033 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3034 struct btrfs_root *root,
3035 struct btrfs_path *path,
3036 struct btrfs_dir_item *di);
3037 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3038 struct btrfs_root *root,
3039 struct btrfs_path *path, u64 objectid,
3040 const char *name, u16 name_len,
3041 const void *data, u16 data_len);
3042 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3043 struct btrfs_root *root,
3044 struct btrfs_path *path, u64 dir,
3045 const char *name, u16 name_len,
3047 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3048 struct btrfs_path *path,
3053 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3054 struct btrfs_root *root, u64 offset);
3055 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3056 struct btrfs_root *root, u64 offset);
3057 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3060 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3061 struct btrfs_root *root,
3062 const char *name, int name_len,
3063 u64 inode_objectid, u64 ref_objectid, u64 index);
3064 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3065 struct btrfs_root *root,
3066 const char *name, int name_len,
3067 u64 inode_objectid, u64 ref_objectid, u64 *index);
3068 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3069 struct btrfs_root *root,
3070 struct btrfs_path *path, u64 objectid);
3071 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3072 *root, struct btrfs_path *path,
3073 struct btrfs_key *location, int mod);
3075 struct btrfs_inode_extref *
3076 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3077 struct btrfs_root *root,
3078 struct btrfs_path *path,
3079 const char *name, int name_len,
3080 u64 inode_objectid, u64 ref_objectid, int ins_len,
3083 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3085 int name_len, struct btrfs_inode_ref **ref_ret);
3086 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3087 u64 ref_objectid, const char *name,
3089 struct btrfs_inode_extref **extref_ret);
3092 struct btrfs_dio_private;
3093 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3094 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3095 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3096 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3097 u64 logical_offset);
3098 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3099 struct btrfs_root *root,
3100 u64 objectid, u64 pos,
3101 u64 disk_offset, u64 disk_num_bytes,
3102 u64 num_bytes, u64 offset, u64 ram_bytes,
3103 u8 compression, u8 encryption, u16 other_encoding);
3104 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3105 struct btrfs_root *root,
3106 struct btrfs_path *path, u64 objectid,
3107 u64 bytenr, int mod);
3108 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3109 struct btrfs_root *root,
3110 struct btrfs_ordered_sum *sums);
3111 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3112 u64 file_start, int contig);
3113 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3114 struct list_head *list, int search_commit);
3115 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3116 const struct btrfs_path *path,
3117 struct btrfs_file_extent_item *fi,
3118 const bool new_inline,
3119 struct extent_map *em);
3122 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3123 struct page *page, size_t pg_offset, u64 start,
3124 u64 len, int create);
3125 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3126 u64 *orig_start, u64 *orig_block_len,
3129 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3130 struct btrfs_inode *inode);
3131 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3132 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3133 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3134 struct btrfs_root *root,
3135 struct btrfs_inode *dir, struct btrfs_inode *inode,
3136 const char *name, int name_len);
3137 int btrfs_add_link(struct btrfs_trans_handle *trans,
3138 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3139 const char *name, int name_len, int add_backref, u64 index);
3140 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3141 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3143 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3144 struct btrfs_root *root,
3145 struct inode *inode, u64 new_size,
3148 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
3149 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3150 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3151 unsigned int extra_bits,
3152 struct extent_state **cached_state, int dedupe);
3153 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3154 struct btrfs_root *new_root,
3155 struct btrfs_root *parent_root,
3157 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3158 size_t size, struct bio *bio,
3159 unsigned long bio_flags);
3160 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3161 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3162 int btrfs_readpage(struct file *file, struct page *page);
3163 void btrfs_evict_inode(struct inode *inode);
3164 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3165 struct inode *btrfs_alloc_inode(struct super_block *sb);
3166 void btrfs_destroy_inode(struct inode *inode);
3167 int btrfs_drop_inode(struct inode *inode);
3168 int __init btrfs_init_cachep(void);
3169 void __cold btrfs_destroy_cachep(void);
3170 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3171 struct btrfs_root *root, int *was_new);
3172 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3173 struct page *page, size_t pg_offset,
3174 u64 start, u64 end, int create);
3175 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3176 struct btrfs_root *root,
3177 struct inode *inode);
3178 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3179 struct btrfs_root *root, struct inode *inode);
3180 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3181 struct btrfs_inode *inode);
3182 int btrfs_orphan_cleanup(struct btrfs_root *root);
3183 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3184 void btrfs_add_delayed_iput(struct inode *inode);
3185 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3186 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3187 u64 start, u64 num_bytes, u64 min_size,
3188 loff_t actual_len, u64 *alloc_hint);
3189 int btrfs_prealloc_file_range_trans(struct inode *inode,
3190 struct btrfs_trans_handle *trans, int mode,
3191 u64 start, u64 num_bytes, u64 min_size,
3192 loff_t actual_len, u64 *alloc_hint);
3193 extern const struct dentry_operations btrfs_dentry_operations;
3196 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3197 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3198 int btrfs_ioctl_get_supported_features(void __user *arg);
3199 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3200 int btrfs_is_empty_uuid(u8 *uuid);
3201 int btrfs_defrag_file(struct inode *inode, struct file *file,
3202 struct btrfs_ioctl_defrag_range_args *range,
3203 u64 newer_than, unsigned long max_pages);
3204 void btrfs_get_block_group_info(struct list_head *groups_list,
3205 struct btrfs_ioctl_space_info *space);
3206 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3207 struct btrfs_ioctl_balance_args *bargs);
3208 int btrfs_dedupe_file_range(struct file *src_file, loff_t src_loff,
3209 struct file *dst_file, loff_t dst_loff,
3213 int __init btrfs_auto_defrag_init(void);
3214 void __cold btrfs_auto_defrag_exit(void);
3215 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3216 struct btrfs_inode *inode);
3217 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3218 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3219 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3220 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3222 extern const struct file_operations btrfs_file_operations;
3223 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3224 struct btrfs_root *root, struct inode *inode,
3225 struct btrfs_path *path, u64 start, u64 end,
3226 u64 *drop_end, int drop_cache,
3228 u32 extent_item_size,
3230 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3231 struct btrfs_root *root, struct inode *inode, u64 start,
3232 u64 end, int drop_cache);
3233 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3234 struct btrfs_inode *inode, u64 start, u64 end);
3235 int btrfs_release_file(struct inode *inode, struct file *file);
3236 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3237 size_t num_pages, loff_t pos, size_t write_bytes,
3238 struct extent_state **cached);
3239 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3240 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3241 struct file *file_out, loff_t pos_out, u64 len);
3244 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3245 struct btrfs_root *root);
3248 int __init btrfs_init_sysfs(void);
3249 void __cold btrfs_exit_sysfs(void);
3250 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3251 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3254 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3255 unsigned long new_flags);
3256 int btrfs_sync_fs(struct super_block *sb, int wait);
3258 static inline __printf(2, 3) __cold
3259 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3263 #ifdef CONFIG_PRINTK
3266 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);