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 /* the first 4 fields must match struct btrfs_header */
199 u8 csum[BTRFS_CSUM_SIZE];
200 /* FS specific UUID, visible to user */
201 u8 fsid[BTRFS_FSID_SIZE];
202 __le64 bytenr; /* this block number */
205 /* allowed to be different from the btrfs_header from here own down */
212 /* this will help find the new super based on the log root */
213 __le64 log_root_transid;
216 __le64 root_dir_objectid;
220 __le32 __unused_leafsize;
222 __le32 sys_chunk_array_size;
223 __le64 chunk_root_generation;
225 __le64 compat_ro_flags;
226 __le64 incompat_flags;
231 struct btrfs_dev_item dev_item;
233 char label[BTRFS_LABEL_SIZE];
235 __le64 cache_generation;
236 __le64 uuid_tree_generation;
238 /* the UUID written into btree blocks */
239 u8 metadata_uuid[BTRFS_FSID_SIZE];
241 /* future expansion */
243 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
244 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
245 } __attribute__ ((__packed__));
248 * Compat flags that we support. If any incompat flags are set other than the
249 * ones specified below then we will fail to mount
251 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
252 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
253 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
255 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
256 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
257 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
259 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
260 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
262 #define BTRFS_FEATURE_INCOMPAT_SUPP \
263 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
264 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
265 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
266 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
267 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
268 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
269 BTRFS_FEATURE_INCOMPAT_RAID56 | \
270 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
271 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
272 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
273 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
275 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
276 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
277 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
280 * A leaf is full of items. offset and size tell us where to find
281 * the item in the leaf (relative to the start of the data area)
284 struct btrfs_disk_key key;
287 } __attribute__ ((__packed__));
290 * leaves have an item area and a data area:
291 * [item0, item1....itemN] [free space] [dataN...data1, data0]
293 * The data is separate from the items to get the keys closer together
297 struct btrfs_header header;
298 struct btrfs_item items[];
299 } __attribute__ ((__packed__));
302 * all non-leaf blocks are nodes, they hold only keys and pointers to
305 struct btrfs_key_ptr {
306 struct btrfs_disk_key key;
309 } __attribute__ ((__packed__));
312 struct btrfs_header header;
313 struct btrfs_key_ptr ptrs[];
314 } __attribute__ ((__packed__));
317 * btrfs_paths remember the path taken from the root down to the leaf.
318 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
319 * to any other levels that are present.
321 * The slots array records the index of the item or block pointer
322 * used while walking the tree.
324 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
326 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
327 int slots[BTRFS_MAX_LEVEL];
328 /* if there is real range locking, this locks field will change */
329 u8 locks[BTRFS_MAX_LEVEL];
331 /* keep some upper locks as we walk down */
335 * set by btrfs_split_item, tells search_slot to keep all locks
336 * and to force calls to keep space in the nodes
338 unsigned int search_for_split:1;
339 unsigned int keep_locks:1;
340 unsigned int skip_locking:1;
341 unsigned int leave_spinning:1;
342 unsigned int search_commit_root:1;
343 unsigned int need_commit_sem:1;
344 unsigned int skip_release_on_error:1;
346 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
347 sizeof(struct btrfs_item))
348 struct btrfs_dev_replace {
349 u64 replace_state; /* see #define above */
350 time64_t time_started; /* seconds since 1-Jan-1970 */
351 time64_t time_stopped; /* seconds since 1-Jan-1970 */
352 atomic64_t num_write_errors;
353 atomic64_t num_uncorrectable_read_errors;
356 u64 committed_cursor_left;
357 u64 cursor_left_last_write_of_item;
360 u64 cont_reading_from_srcdev_mode; /* see #define above */
363 int item_needs_writeback;
364 struct btrfs_device *srcdev;
365 struct btrfs_device *tgtdev;
367 struct mutex lock_finishing_cancel_unmount;
369 atomic_t blocking_readers;
370 wait_queue_head_t read_lock_wq;
372 struct btrfs_scrub_progress scrub_progress;
374 struct percpu_counter bio_counter;
375 wait_queue_head_t replace_wait;
378 /* For raid type sysfs entries */
379 struct raid_kobject {
382 struct list_head list;
385 struct btrfs_space_info {
388 u64 total_bytes; /* total bytes in the space,
389 this doesn't take mirrors into account */
390 u64 bytes_used; /* total bytes used,
391 this doesn't take mirrors into account */
392 u64 bytes_pinned; /* total bytes pinned, will be freed when the
393 transaction finishes */
394 u64 bytes_reserved; /* total bytes the allocator has reserved for
395 current allocations */
396 u64 bytes_may_use; /* number of bytes that may be used for
397 delalloc/allocations */
398 u64 bytes_readonly; /* total bytes that are read only */
400 u64 max_extent_size; /* This will hold the maximum extent size of
401 the space info if we had an ENOSPC in the
404 unsigned int full:1; /* indicates that we cannot allocate any more
405 chunks for this space */
406 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
408 unsigned int flush:1; /* set if we are trying to make space */
410 unsigned int force_alloc; /* set if we need to force a chunk
411 alloc for this space */
413 u64 disk_used; /* total bytes used on disk */
414 u64 disk_total; /* total bytes on disk, takes mirrors into
420 * bytes_pinned is kept in line with what is actually pinned, as in
421 * we've called update_block_group and dropped the bytes_used counter
422 * and increased the bytes_pinned counter. However this means that
423 * bytes_pinned does not reflect the bytes that will be pinned once the
424 * delayed refs are flushed, so this counter is inc'ed every time we
425 * call btrfs_free_extent so it is a realtime count of what will be
426 * freed once the transaction is committed. It will be zeroed every
427 * time the transaction commits.
429 struct percpu_counter total_bytes_pinned;
431 struct list_head list;
432 /* Protected by the spinlock 'lock'. */
433 struct list_head ro_bgs;
434 struct list_head priority_tickets;
435 struct list_head tickets;
437 * tickets_id just indicates the next ticket will be handled, so note
438 * it's not stored per ticket.
442 struct rw_semaphore groups_sem;
443 /* for block groups in our same type */
444 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
445 wait_queue_head_t wait;
448 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
451 #define BTRFS_BLOCK_RSV_GLOBAL 1
452 #define BTRFS_BLOCK_RSV_DELALLOC 2
453 #define BTRFS_BLOCK_RSV_TRANS 3
454 #define BTRFS_BLOCK_RSV_CHUNK 4
455 #define BTRFS_BLOCK_RSV_DELOPS 5
456 #define BTRFS_BLOCK_RSV_EMPTY 6
457 #define BTRFS_BLOCK_RSV_TEMP 7
459 struct btrfs_block_rsv {
462 struct btrfs_space_info *space_info;
466 unsigned short failfast;
469 * Qgroup equivalent for @size @reserved
471 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
472 * about things like csum size nor how many tree blocks it will need to
475 * Qgroup cares more about net change of the extent usage.
477 * So for one newly inserted file extent, in worst case it will cause
478 * leaf split and level increase, nodesize for each file extent is
481 * In short, qgroup_size/reserved is the upper limit of possible needed
482 * qgroup metadata reservation.
485 u64 qgroup_rsv_reserved;
489 * free clusters are used to claim free space in relatively large chunks,
490 * allowing us to do less seeky writes. They are used for all metadata
491 * allocations. In ssd_spread mode they are also used for data allocations.
493 struct btrfs_free_cluster {
495 spinlock_t refill_lock;
498 /* largest extent in this cluster */
501 /* first extent starting offset */
504 /* We did a full search and couldn't create a cluster */
507 struct btrfs_block_group_cache *block_group;
509 * when a cluster is allocated from a block group, we put the
510 * cluster onto a list in the block group so that it can
511 * be freed before the block group is freed.
513 struct list_head block_group_list;
516 enum btrfs_caching_type {
518 BTRFS_CACHE_STARTED = 1,
519 BTRFS_CACHE_FAST = 2,
520 BTRFS_CACHE_FINISHED = 3,
521 BTRFS_CACHE_ERROR = 4,
524 enum btrfs_disk_cache_state {
525 BTRFS_DC_WRITTEN = 0,
531 struct btrfs_caching_control {
532 struct list_head list;
534 wait_queue_head_t wait;
535 struct btrfs_work work;
536 struct btrfs_block_group_cache *block_group;
541 /* Once caching_thread() finds this much free space, it will wake up waiters. */
542 #define CACHING_CTL_WAKE_UP SZ_2M
544 struct btrfs_io_ctl {
548 struct btrfs_fs_info *fs_info;
555 unsigned check_crcs:1;
559 * Tree to record all locked full stripes of a RAID5/6 block group
561 struct btrfs_full_stripe_locks_tree {
566 struct btrfs_block_group_cache {
567 struct btrfs_key key;
568 struct btrfs_block_group_item item;
569 struct btrfs_fs_info *fs_info;
577 u64 cache_generation;
580 * If the free space extent count exceeds this number, convert the block
583 u32 bitmap_high_thresh;
586 * If the free space extent count drops below this number, convert the
587 * block group back to extents.
589 u32 bitmap_low_thresh;
592 * It is just used for the delayed data space allocation because
593 * only the data space allocation and the relative metadata update
594 * can be done cross the transaction.
596 struct rw_semaphore data_rwsem;
598 /* for raid56, this is a full stripe, without parity */
599 unsigned long full_stripe_len;
603 unsigned int has_caching_ctl:1;
604 unsigned int removed:1;
606 int disk_cache_state;
608 /* cache tracking stuff */
610 struct btrfs_caching_control *caching_ctl;
611 u64 last_byte_to_unpin;
613 struct btrfs_space_info *space_info;
615 /* free space cache stuff */
616 struct btrfs_free_space_ctl *free_space_ctl;
618 /* block group cache stuff */
619 struct rb_node cache_node;
621 /* for block groups in the same raid type */
622 struct list_head list;
627 /* List of struct btrfs_free_clusters for this block group.
628 * Today it will only have one thing on it, but that may change
630 struct list_head cluster_list;
632 /* For delayed block group creation or deletion of empty block groups */
633 struct list_head bg_list;
635 /* For read-only block groups */
636 struct list_head ro_list;
640 /* For dirty block groups */
641 struct list_head dirty_list;
642 struct list_head io_list;
644 struct btrfs_io_ctl io_ctl;
647 * Incremented when doing extent allocations and holding a read lock
648 * on the space_info's groups_sem semaphore.
649 * Decremented when an ordered extent that represents an IO against this
650 * block group's range is created (after it's added to its inode's
651 * root's list of ordered extents) or immediately after the allocation
652 * if it's a metadata extent or fallocate extent (for these cases we
653 * don't create ordered extents).
655 atomic_t reservations;
658 * Incremented while holding the spinlock *lock* by a task checking if
659 * it can perform a nocow write (incremented if the value for the *ro*
660 * field is 0). Decremented by such tasks once they create an ordered
661 * extent or before that if some error happens before reaching that step.
662 * This is to prevent races between block group relocation and nocow
663 * writes through direct IO.
665 atomic_t nocow_writers;
667 /* Lock for free space tree operations. */
668 struct mutex free_space_lock;
671 * Does the block group need to be added to the free space tree?
672 * Protected by free_space_lock.
674 int needs_free_space;
676 /* Record locked full stripes for RAID5/6 block group */
677 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
680 /* delayed seq elem */
682 struct list_head list;
686 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
688 #define SEQ_LAST ((u64)-1)
690 enum btrfs_orphan_cleanup_state {
691 ORPHAN_CLEANUP_STARTED = 1,
692 ORPHAN_CLEANUP_DONE = 2,
695 /* used by the raid56 code to lock stripes for read/modify/write */
696 struct btrfs_stripe_hash {
697 struct list_head hash_list;
701 /* used by the raid56 code to lock stripes for read/modify/write */
702 struct btrfs_stripe_hash_table {
703 struct list_head stripe_cache;
704 spinlock_t cache_lock;
706 struct btrfs_stripe_hash table[];
709 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
711 void btrfs_init_async_reclaim_work(struct work_struct *work);
714 struct reloc_control;
716 struct btrfs_fs_devices;
717 struct btrfs_balance_control;
718 struct btrfs_delayed_root;
721 * Block group or device which contains an active swapfile. Used for preventing
722 * unsafe operations while a swapfile is active.
724 * These are sorted on (ptr, inode) (note that a block group or device can
725 * contain more than one swapfile). We compare the pointer values because we
726 * don't actually care what the object is, we just need a quick check whether
727 * the object exists in the rbtree.
729 struct btrfs_swapfile_pin {
734 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
735 * ptr points to a struct btrfs_device.
740 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
742 #define BTRFS_FS_BARRIER 1
743 #define BTRFS_FS_CLOSING_START 2
744 #define BTRFS_FS_CLOSING_DONE 3
745 #define BTRFS_FS_LOG_RECOVERING 4
746 #define BTRFS_FS_OPEN 5
747 #define BTRFS_FS_QUOTA_ENABLED 6
748 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
749 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
750 #define BTRFS_FS_BTREE_ERR 11
751 #define BTRFS_FS_LOG1_ERR 12
752 #define BTRFS_FS_LOG2_ERR 13
753 #define BTRFS_FS_QUOTA_OVERRIDE 14
754 /* Used to record internally whether fs has been frozen */
755 #define BTRFS_FS_FROZEN 15
758 * Indicate that a whole-filesystem exclusive operation is running
759 * (device replace, resize, device add/delete, balance)
761 #define BTRFS_FS_EXCL_OP 16
764 * To info transaction_kthread we need an immediate commit so it doesn't
765 * need to wait for commit_interval
767 #define BTRFS_FS_NEED_ASYNC_COMMIT 17
770 * Indicate that balance has been set up from the ioctl and is in the main
771 * phase. The fs_info::balance_ctl is initialized.
773 #define BTRFS_FS_BALANCE_RUNNING 18
775 struct btrfs_fs_info {
776 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
778 struct btrfs_root *extent_root;
779 struct btrfs_root *tree_root;
780 struct btrfs_root *chunk_root;
781 struct btrfs_root *dev_root;
782 struct btrfs_root *fs_root;
783 struct btrfs_root *csum_root;
784 struct btrfs_root *quota_root;
785 struct btrfs_root *uuid_root;
786 struct btrfs_root *free_space_root;
788 /* the log root tree is a directory of all the other log roots */
789 struct btrfs_root *log_root_tree;
791 spinlock_t fs_roots_radix_lock;
792 struct radix_tree_root fs_roots_radix;
794 /* block group cache stuff */
795 spinlock_t block_group_cache_lock;
796 u64 first_logical_byte;
797 struct rb_root block_group_cache_tree;
799 /* keep track of unallocated space */
800 atomic64_t free_chunk_space;
802 struct extent_io_tree freed_extents[2];
803 struct extent_io_tree *pinned_extents;
805 /* logical->physical extent mapping */
806 struct btrfs_mapping_tree mapping_tree;
809 * block reservation for extent, checksum, root tree and
810 * delayed dir index item
812 struct btrfs_block_rsv global_block_rsv;
813 /* block reservation for metadata operations */
814 struct btrfs_block_rsv trans_block_rsv;
815 /* block reservation for chunk tree */
816 struct btrfs_block_rsv chunk_block_rsv;
817 /* block reservation for delayed operations */
818 struct btrfs_block_rsv delayed_block_rsv;
820 struct btrfs_block_rsv empty_block_rsv;
823 u64 last_trans_committed;
824 u64 avg_delayed_ref_runtime;
827 * this is updated to the current trans every time a full commit
828 * is required instead of the faster short fsync log commits
830 u64 last_trans_log_full_commit;
831 unsigned long mount_opt;
833 * Track requests for actions that need to be done during transaction
834 * commit (like for some mount options).
836 unsigned long pending_changes;
837 unsigned long compress_type:4;
838 unsigned int compress_level;
841 * It is a suggestive number, the read side is safe even it gets a
842 * wrong number because we will write out the data into a regular
843 * extent. The write side(mount/remount) is under ->s_umount lock,
844 * so it is also safe.
848 struct btrfs_transaction *running_transaction;
849 wait_queue_head_t transaction_throttle;
850 wait_queue_head_t transaction_wait;
851 wait_queue_head_t transaction_blocked_wait;
852 wait_queue_head_t async_submit_wait;
855 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
856 * when they are updated.
858 * Because we do not clear the flags for ever, so we needn't use
859 * the lock on the read side.
861 * We also needn't use the lock when we mount the fs, because
862 * there is no other task which will update the flag.
864 spinlock_t super_lock;
865 struct btrfs_super_block *super_copy;
866 struct btrfs_super_block *super_for_commit;
867 struct super_block *sb;
868 struct inode *btree_inode;
869 struct mutex tree_log_mutex;
870 struct mutex transaction_kthread_mutex;
871 struct mutex cleaner_mutex;
872 struct mutex chunk_mutex;
875 * this is taken to make sure we don't set block groups ro after
876 * the free space cache has been allocated on them
878 struct mutex ro_block_group_mutex;
880 /* this is used during read/modify/write to make sure
881 * no two ios are trying to mod the same stripe at the same
884 struct btrfs_stripe_hash_table *stripe_hash_table;
887 * this protects the ordered operations list only while we are
888 * processing all of the entries on it. This way we make
889 * sure the commit code doesn't find the list temporarily empty
890 * because another function happens to be doing non-waiting preflush
891 * before jumping into the main commit.
893 struct mutex ordered_operations_mutex;
895 struct rw_semaphore commit_root_sem;
897 struct rw_semaphore cleanup_work_sem;
899 struct rw_semaphore subvol_sem;
900 struct srcu_struct subvol_srcu;
902 spinlock_t trans_lock;
904 * the reloc mutex goes with the trans lock, it is taken
905 * during commit to protect us from the relocation code
907 struct mutex reloc_mutex;
909 struct list_head trans_list;
910 struct list_head dead_roots;
911 struct list_head caching_block_groups;
913 spinlock_t delayed_iput_lock;
914 struct list_head delayed_iputs;
915 struct mutex cleaner_delayed_iput_mutex;
917 /* this protects tree_mod_seq_list */
918 spinlock_t tree_mod_seq_lock;
919 atomic64_t tree_mod_seq;
920 struct list_head tree_mod_seq_list;
922 /* this protects tree_mod_log */
923 rwlock_t tree_mod_log_lock;
924 struct rb_root tree_mod_log;
926 atomic_t async_delalloc_pages;
929 * this is used to protect the following list -- ordered_roots.
931 spinlock_t ordered_root_lock;
934 * all fs/file tree roots in which there are data=ordered extents
935 * pending writeback are added into this list.
937 * these can span multiple transactions and basically include
938 * every dirty data page that isn't from nodatacow
940 struct list_head ordered_roots;
942 struct mutex delalloc_root_mutex;
943 spinlock_t delalloc_root_lock;
944 /* all fs/file tree roots that have delalloc inodes. */
945 struct list_head delalloc_roots;
948 * there is a pool of worker threads for checksumming during writes
949 * and a pool for checksumming after reads. This is because readers
950 * can run with FS locks held, and the writers may be waiting for
951 * those locks. We don't want ordering in the pending list to cause
952 * deadlocks, and so the two are serviced separately.
954 * A third pool does submit_bio to avoid deadlocking with the other
957 struct btrfs_workqueue *workers;
958 struct btrfs_workqueue *delalloc_workers;
959 struct btrfs_workqueue *flush_workers;
960 struct btrfs_workqueue *endio_workers;
961 struct btrfs_workqueue *endio_meta_workers;
962 struct btrfs_workqueue *endio_raid56_workers;
963 struct btrfs_workqueue *endio_repair_workers;
964 struct btrfs_workqueue *rmw_workers;
965 struct btrfs_workqueue *endio_meta_write_workers;
966 struct btrfs_workqueue *endio_write_workers;
967 struct btrfs_workqueue *endio_freespace_worker;
968 struct btrfs_workqueue *submit_workers;
969 struct btrfs_workqueue *caching_workers;
970 struct btrfs_workqueue *readahead_workers;
973 * fixup workers take dirty pages that didn't properly go through
974 * the cow mechanism and make them safe to write. It happens
975 * for the sys_munmap function call path
977 struct btrfs_workqueue *fixup_workers;
978 struct btrfs_workqueue *delayed_workers;
980 /* the extent workers do delayed refs on the extent allocation tree */
981 struct btrfs_workqueue *extent_workers;
982 struct task_struct *transaction_kthread;
983 struct task_struct *cleaner_kthread;
984 u32 thread_pool_size;
986 struct kobject *space_info_kobj;
987 struct list_head pending_raid_kobjs;
988 spinlock_t pending_raid_kobjs_lock; /* uncontended */
992 /* used to keep from writing metadata until there is a nice batch */
993 struct percpu_counter dirty_metadata_bytes;
994 struct percpu_counter delalloc_bytes;
995 s32 dirty_metadata_batch;
998 struct list_head dirty_cowonly_roots;
1000 struct btrfs_fs_devices *fs_devices;
1003 * The space_info list is effectively read only after initial
1004 * setup. It is populated at mount time and cleaned up after
1005 * all block groups are removed. RCU is used to protect it.
1007 struct list_head space_info;
1009 struct btrfs_space_info *data_sinfo;
1011 struct reloc_control *reloc_ctl;
1013 /* data_alloc_cluster is only used in ssd_spread mode */
1014 struct btrfs_free_cluster data_alloc_cluster;
1016 /* all metadata allocations go through this cluster */
1017 struct btrfs_free_cluster meta_alloc_cluster;
1019 /* auto defrag inodes go here */
1020 spinlock_t defrag_inodes_lock;
1021 struct rb_root defrag_inodes;
1022 atomic_t defrag_running;
1024 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1025 seqlock_t profiles_lock;
1027 * these three are in extended format (availability of single
1028 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1029 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1031 u64 avail_data_alloc_bits;
1032 u64 avail_metadata_alloc_bits;
1033 u64 avail_system_alloc_bits;
1035 /* restriper state */
1036 spinlock_t balance_lock;
1037 struct mutex balance_mutex;
1038 atomic_t balance_pause_req;
1039 atomic_t balance_cancel_req;
1040 struct btrfs_balance_control *balance_ctl;
1041 wait_queue_head_t balance_wait_q;
1043 u32 data_chunk_allocations;
1048 /* private scrub information */
1049 struct mutex scrub_lock;
1050 atomic_t scrubs_running;
1051 atomic_t scrub_pause_req;
1052 atomic_t scrubs_paused;
1053 atomic_t scrub_cancel_req;
1054 wait_queue_head_t scrub_pause_wait;
1055 int scrub_workers_refcnt;
1056 struct btrfs_workqueue *scrub_workers;
1057 struct btrfs_workqueue *scrub_wr_completion_workers;
1058 struct btrfs_workqueue *scrub_nocow_workers;
1059 struct btrfs_workqueue *scrub_parity_workers;
1061 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1062 u32 check_integrity_print_mask;
1064 /* is qgroup tracking in a consistent state? */
1067 /* holds configuration and tracking. Protected by qgroup_lock */
1068 struct rb_root qgroup_tree;
1069 struct rb_root qgroup_op_tree;
1070 spinlock_t qgroup_lock;
1071 spinlock_t qgroup_op_lock;
1072 atomic_t qgroup_op_seq;
1075 * used to avoid frequently calling ulist_alloc()/ulist_free()
1076 * when doing qgroup accounting, it must be protected by qgroup_lock.
1078 struct ulist *qgroup_ulist;
1080 /* protect user change for quota operations */
1081 struct mutex qgroup_ioctl_lock;
1083 /* list of dirty qgroups to be written at next commit */
1084 struct list_head dirty_qgroups;
1086 /* used by qgroup for an efficient tree traversal */
1089 /* qgroup rescan items */
1090 struct mutex qgroup_rescan_lock; /* protects the progress item */
1091 struct btrfs_key qgroup_rescan_progress;
1092 struct btrfs_workqueue *qgroup_rescan_workers;
1093 struct completion qgroup_rescan_completion;
1094 struct btrfs_work qgroup_rescan_work;
1095 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1097 /* filesystem state */
1098 unsigned long fs_state;
1100 struct btrfs_delayed_root *delayed_root;
1102 /* readahead tree */
1103 spinlock_t reada_lock;
1104 struct radix_tree_root reada_tree;
1106 /* readahead works cnt */
1107 atomic_t reada_works_cnt;
1109 /* Extent buffer radix tree */
1110 spinlock_t buffer_lock;
1111 struct radix_tree_root buffer_radix;
1113 /* next backup root to be overwritten */
1114 int backup_root_index;
1116 /* device replace state */
1117 struct btrfs_dev_replace dev_replace;
1119 struct semaphore uuid_tree_rescan_sem;
1121 /* Used to reclaim the metadata space in the background. */
1122 struct work_struct async_reclaim_work;
1124 spinlock_t unused_bgs_lock;
1125 struct list_head unused_bgs;
1126 struct mutex unused_bg_unpin_mutex;
1127 struct mutex delete_unused_bgs_mutex;
1129 /* For btrfs to record security options */
1130 struct security_mnt_opts security_opts;
1133 * Chunks that can't be freed yet (under a trim/discard operation)
1134 * and will be latter freed. Protected by fs_info->chunk_mutex.
1136 struct list_head pinned_chunks;
1138 /* Cached block sizes */
1143 /* Block groups and devices containing active swapfiles. */
1144 spinlock_t swapfile_pins_lock;
1145 struct rb_root swapfile_pins;
1147 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1148 spinlock_t ref_verify_lock;
1149 struct rb_root block_tree;
1153 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1155 return sb->s_fs_info;
1158 struct btrfs_subvolume_writers {
1159 struct percpu_counter counter;
1160 wait_queue_head_t wait;
1164 * The state of btrfs root
1167 * btrfs_record_root_in_trans is a multi-step process,
1168 * and it can race with the balancing code. But the
1169 * race is very small, and only the first time the root
1170 * is added to each transaction. So IN_TRANS_SETUP
1171 * is used to tell us when more checks are required
1173 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1174 #define BTRFS_ROOT_REF_COWS 1
1175 #define BTRFS_ROOT_TRACK_DIRTY 2
1176 #define BTRFS_ROOT_IN_RADIX 3
1177 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1178 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1179 #define BTRFS_ROOT_FORCE_COW 6
1180 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1181 #define BTRFS_ROOT_DIRTY 8
1184 * in ram representation of the tree. extent_root is used for all allocations
1185 * and for the extent tree extent_root root.
1188 struct extent_buffer *node;
1190 struct extent_buffer *commit_root;
1191 struct btrfs_root *log_root;
1192 struct btrfs_root *reloc_root;
1194 unsigned long state;
1195 struct btrfs_root_item root_item;
1196 struct btrfs_key root_key;
1197 struct btrfs_fs_info *fs_info;
1198 struct extent_io_tree dirty_log_pages;
1200 struct mutex objectid_mutex;
1202 spinlock_t accounting_lock;
1203 struct btrfs_block_rsv *block_rsv;
1205 /* free ino cache stuff */
1206 struct btrfs_free_space_ctl *free_ino_ctl;
1207 enum btrfs_caching_type ino_cache_state;
1208 spinlock_t ino_cache_lock;
1209 wait_queue_head_t ino_cache_wait;
1210 struct btrfs_free_space_ctl *free_ino_pinned;
1211 u64 ino_cache_progress;
1212 struct inode *ino_cache_inode;
1214 struct mutex log_mutex;
1215 wait_queue_head_t log_writer_wait;
1216 wait_queue_head_t log_commit_wait[2];
1217 struct list_head log_ctxs[2];
1218 atomic_t log_writers;
1219 atomic_t log_commit[2];
1222 /* No matter the commit succeeds or not*/
1223 int log_transid_committed;
1224 /* Just be updated when the commit succeeds. */
1225 int last_log_commit;
1226 pid_t log_start_pid;
1232 u64 highest_objectid;
1234 u64 defrag_trans_start;
1235 struct btrfs_key defrag_progress;
1236 struct btrfs_key defrag_max;
1238 /* the dirty list is only used by non-reference counted roots */
1239 struct list_head dirty_list;
1241 struct list_head root_list;
1243 spinlock_t log_extents_lock[2];
1244 struct list_head logged_list[2];
1246 int orphan_cleanup_state;
1248 spinlock_t inode_lock;
1249 /* red-black tree that keeps track of in-memory inodes */
1250 struct rb_root inode_tree;
1253 * radix tree that keeps track of delayed nodes of every inode,
1254 * protected by inode_lock
1256 struct radix_tree_root delayed_nodes_tree;
1258 * right now this just gets used so that a root has its own devid
1259 * for stat. It may be used for more later
1263 spinlock_t root_item_lock;
1266 struct mutex delalloc_mutex;
1267 spinlock_t delalloc_lock;
1269 * all of the inodes that have delalloc bytes. It is possible for
1270 * this list to be empty even when there is still dirty data=ordered
1271 * extents waiting to finish IO.
1273 struct list_head delalloc_inodes;
1274 struct list_head delalloc_root;
1275 u64 nr_delalloc_inodes;
1277 struct mutex ordered_extent_mutex;
1279 * this is used by the balancing code to wait for all the pending
1282 spinlock_t ordered_extent_lock;
1285 * all of the data=ordered extents pending writeback
1286 * these can span multiple transactions and basically include
1287 * every dirty data page that isn't from nodatacow
1289 struct list_head ordered_extents;
1290 struct list_head ordered_root;
1291 u64 nr_ordered_extents;
1294 * Number of currently running SEND ioctls to prevent
1295 * manipulation with the read-only status via SUBVOL_SETFLAGS
1297 int send_in_progress;
1298 struct btrfs_subvolume_writers *subv_writers;
1299 atomic_t will_be_snapshotted;
1300 atomic_t snapshot_force_cow;
1302 /* For qgroup metadata reserved space */
1303 spinlock_t qgroup_meta_rsv_lock;
1304 u64 qgroup_meta_rsv_pertrans;
1305 u64 qgroup_meta_rsv_prealloc;
1307 /* Number of active swapfiles */
1308 atomic_t nr_swapfiles;
1310 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1315 struct btrfs_file_private {
1319 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1321 return btrfs_sb(inode->i_sb)->sectorsize;
1324 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1327 return info->nodesize - sizeof(struct btrfs_header);
1330 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1332 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1334 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1337 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1339 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1342 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1343 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1344 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1346 return BTRFS_MAX_ITEM_SIZE(info) -
1347 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1350 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1352 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1356 * Flags for mount options.
1358 * Note: don't forget to add new options to btrfs_show_options()
1360 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1361 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1362 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1363 #define BTRFS_MOUNT_SSD (1 << 3)
1364 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1365 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1366 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1367 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1368 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1369 #define BTRFS_MOUNT_NOSSD (1 << 9)
1370 #define BTRFS_MOUNT_DISCARD (1 << 10)
1371 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1372 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1373 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1374 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1375 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1376 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1377 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1378 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1379 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1380 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1381 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1382 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1383 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1384 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1385 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1386 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1387 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1388 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1390 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1391 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1393 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1394 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1395 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1396 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1399 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1401 if (!btrfs_test_opt(fs_info, opt)) \
1402 btrfs_info(fs_info, fmt, ##args); \
1403 btrfs_set_opt(fs_info->mount_opt, opt); \
1406 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1408 if (btrfs_test_opt(fs_info, opt)) \
1409 btrfs_info(fs_info, fmt, ##args); \
1410 btrfs_clear_opt(fs_info->mount_opt, opt); \
1413 #ifdef CONFIG_BTRFS_DEBUG
1415 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1417 struct btrfs_fs_info *fs_info = block_group->fs_info;
1419 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1420 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1421 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1422 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1427 * Requests for changes that need to be done during transaction commit.
1429 * Internal mount options that are used for special handling of the real
1430 * mount options (eg. cannot be set during remount and have to be set during
1431 * transaction commit)
1434 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1435 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1436 #define BTRFS_PENDING_COMMIT (2)
1438 #define btrfs_test_pending(info, opt) \
1439 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1440 #define btrfs_set_pending(info, opt) \
1441 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1442 #define btrfs_clear_pending(info, opt) \
1443 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1446 * Helpers for setting pending mount option changes.
1448 * Expects corresponding macros
1449 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1451 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1453 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1454 btrfs_info((info), fmt, ##args); \
1455 btrfs_set_pending((info), SET_##opt); \
1456 btrfs_clear_pending((info), CLEAR_##opt); \
1460 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1462 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1463 btrfs_info((info), fmt, ##args); \
1464 btrfs_set_pending((info), CLEAR_##opt); \
1465 btrfs_clear_pending((info), SET_##opt); \
1472 #define BTRFS_INODE_NODATASUM (1 << 0)
1473 #define BTRFS_INODE_NODATACOW (1 << 1)
1474 #define BTRFS_INODE_READONLY (1 << 2)
1475 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1476 #define BTRFS_INODE_PREALLOC (1 << 4)
1477 #define BTRFS_INODE_SYNC (1 << 5)
1478 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1479 #define BTRFS_INODE_APPEND (1 << 7)
1480 #define BTRFS_INODE_NODUMP (1 << 8)
1481 #define BTRFS_INODE_NOATIME (1 << 9)
1482 #define BTRFS_INODE_DIRSYNC (1 << 10)
1483 #define BTRFS_INODE_COMPRESS (1 << 11)
1485 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1487 struct btrfs_map_token {
1488 const struct extent_buffer *eb;
1490 unsigned long offset;
1493 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1494 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1496 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1498 token->kaddr = NULL;
1501 /* some macros to generate set/get functions for the struct fields. This
1502 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1505 #define le8_to_cpu(v) (v)
1506 #define cpu_to_le8(v) (v)
1509 #define read_eb_member(eb, ptr, type, member, result) (\
1510 read_extent_buffer(eb, (char *)(result), \
1511 ((unsigned long)(ptr)) + \
1512 offsetof(type, member), \
1513 sizeof(((type *)0)->member)))
1515 #define write_eb_member(eb, ptr, type, member, result) (\
1516 write_extent_buffer(eb, (char *)(result), \
1517 ((unsigned long)(ptr)) + \
1518 offsetof(type, member), \
1519 sizeof(((type *)0)->member)))
1521 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1522 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1523 const void *ptr, unsigned long off, \
1524 struct btrfs_map_token *token); \
1525 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1526 unsigned long off, u##bits val, \
1527 struct btrfs_map_token *token); \
1528 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1530 unsigned long off) \
1532 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1534 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1535 unsigned long off, u##bits val) \
1537 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1540 DECLARE_BTRFS_SETGET_BITS(8)
1541 DECLARE_BTRFS_SETGET_BITS(16)
1542 DECLARE_BTRFS_SETGET_BITS(32)
1543 DECLARE_BTRFS_SETGET_BITS(64)
1545 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1546 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1549 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1550 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1552 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1555 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1556 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1558 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1560 struct btrfs_map_token *token) \
1562 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1563 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1565 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1566 type *s, u##bits val, \
1567 struct btrfs_map_token *token) \
1569 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1570 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1573 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1574 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1576 const type *p = page_address(eb->pages[0]); \
1577 u##bits res = le##bits##_to_cpu(p->member); \
1580 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1583 type *p = page_address(eb->pages[0]); \
1584 p->member = cpu_to_le##bits(val); \
1587 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1588 static inline u##bits btrfs_##name(const type *s) \
1590 return le##bits##_to_cpu(s->member); \
1592 static inline void btrfs_set_##name(type *s, u##bits val) \
1594 s->member = cpu_to_le##bits(val); \
1598 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1599 struct btrfs_dev_item *s)
1601 BUILD_BUG_ON(sizeof(u64) !=
1602 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1603 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1606 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1607 struct btrfs_dev_item *s,
1610 BUILD_BUG_ON(sizeof(u64) !=
1611 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1612 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1613 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1617 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1618 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1619 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1620 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1621 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1623 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1624 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1625 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1626 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1627 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1628 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1630 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1631 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1633 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1635 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1637 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1639 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1641 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1642 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1644 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1646 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1648 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1651 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1653 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1656 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1658 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1661 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1662 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1663 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1664 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1665 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1666 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1667 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1668 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1669 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1670 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1671 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1673 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1675 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1678 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1679 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1680 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1682 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1684 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1686 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1688 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1689 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1691 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1693 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1694 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1696 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1699 unsigned long offset = (unsigned long)c;
1700 offset += offsetof(struct btrfs_chunk, stripe);
1701 offset += nr * sizeof(struct btrfs_stripe);
1702 return (struct btrfs_stripe *)offset;
1705 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1707 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1710 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1711 struct btrfs_chunk *c, int nr)
1713 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1716 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1717 struct btrfs_chunk *c, int nr)
1719 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1722 /* struct btrfs_block_group_item */
1723 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1725 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1727 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1728 struct btrfs_block_group_item, chunk_objectid, 64);
1730 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1731 struct btrfs_block_group_item, chunk_objectid, 64);
1732 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1733 struct btrfs_block_group_item, flags, 64);
1734 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1735 struct btrfs_block_group_item, flags, 64);
1737 /* struct btrfs_free_space_info */
1738 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1740 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1742 /* struct btrfs_inode_ref */
1743 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1744 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1746 /* struct btrfs_inode_extref */
1747 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1748 parent_objectid, 64);
1749 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1751 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1753 /* struct btrfs_inode_item */
1754 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1755 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1756 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1757 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1758 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1759 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1760 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1761 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1762 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1763 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1764 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1765 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1766 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1768 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1770 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1772 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1773 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1775 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1777 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1778 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1779 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1780 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1781 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1782 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1783 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1784 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1785 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1786 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1788 /* struct btrfs_dev_extent */
1789 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1791 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1792 chunk_objectid, 64);
1793 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1795 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1797 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1799 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1800 return (unsigned long)dev + ptr;
1803 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1804 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1806 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1808 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1811 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1813 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1814 struct btrfs_tree_block_info *item,
1815 struct btrfs_disk_key *key)
1817 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1820 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1821 struct btrfs_tree_block_info *item,
1822 struct btrfs_disk_key *key)
1824 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1827 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1829 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1831 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1833 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1836 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1839 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1841 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1844 static inline u32 btrfs_extent_inline_ref_size(int type)
1846 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1847 type == BTRFS_SHARED_BLOCK_REF_KEY)
1848 return sizeof(struct btrfs_extent_inline_ref);
1849 if (type == BTRFS_SHARED_DATA_REF_KEY)
1850 return sizeof(struct btrfs_shared_data_ref) +
1851 sizeof(struct btrfs_extent_inline_ref);
1852 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1853 return sizeof(struct btrfs_extent_data_ref) +
1854 offsetof(struct btrfs_extent_inline_ref, offset);
1858 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1859 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1861 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1862 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1864 /* struct btrfs_node */
1865 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1866 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1867 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1869 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1872 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1875 ptr = offsetof(struct btrfs_node, ptrs) +
1876 sizeof(struct btrfs_key_ptr) * nr;
1877 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1880 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1884 ptr = offsetof(struct btrfs_node, ptrs) +
1885 sizeof(struct btrfs_key_ptr) * nr;
1886 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1889 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1892 ptr = offsetof(struct btrfs_node, ptrs) +
1893 sizeof(struct btrfs_key_ptr) * nr;
1894 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1897 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1901 ptr = offsetof(struct btrfs_node, ptrs) +
1902 sizeof(struct btrfs_key_ptr) * nr;
1903 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1906 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1908 return offsetof(struct btrfs_node, ptrs) +
1909 sizeof(struct btrfs_key_ptr) * nr;
1912 void btrfs_node_key(const struct extent_buffer *eb,
1913 struct btrfs_disk_key *disk_key, int nr);
1915 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1916 struct btrfs_disk_key *disk_key, int nr)
1919 ptr = btrfs_node_key_ptr_offset(nr);
1920 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1921 struct btrfs_key_ptr, key, disk_key);
1924 /* struct btrfs_item */
1925 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1926 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1927 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1928 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1930 static inline unsigned long btrfs_item_nr_offset(int nr)
1932 return offsetof(struct btrfs_leaf, items) +
1933 sizeof(struct btrfs_item) * nr;
1936 static inline struct btrfs_item *btrfs_item_nr(int nr)
1938 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1941 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1942 struct btrfs_item *item)
1944 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1947 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1949 return btrfs_item_end(eb, btrfs_item_nr(nr));
1952 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1954 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1957 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1959 return btrfs_item_size(eb, btrfs_item_nr(nr));
1962 static inline void btrfs_item_key(const struct extent_buffer *eb,
1963 struct btrfs_disk_key *disk_key, int nr)
1965 struct btrfs_item *item = btrfs_item_nr(nr);
1966 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1969 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1970 struct btrfs_disk_key *disk_key, int nr)
1972 struct btrfs_item *item = btrfs_item_nr(nr);
1973 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1976 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1979 * struct btrfs_root_ref
1981 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1982 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1983 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1985 /* struct btrfs_dir_item */
1986 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1987 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1988 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1989 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1990 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1991 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1993 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1995 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1998 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1999 const struct btrfs_dir_item *item,
2000 struct btrfs_disk_key *key)
2002 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2005 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2006 struct btrfs_dir_item *item,
2007 const struct btrfs_disk_key *key)
2009 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2012 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2014 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2016 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2019 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2020 const struct btrfs_free_space_header *h,
2021 struct btrfs_disk_key *key)
2023 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2026 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2027 struct btrfs_free_space_header *h,
2028 const struct btrfs_disk_key *key)
2030 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2033 /* struct btrfs_disk_key */
2034 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2036 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2037 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2039 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2040 const struct btrfs_disk_key *disk)
2042 cpu->offset = le64_to_cpu(disk->offset);
2043 cpu->type = disk->type;
2044 cpu->objectid = le64_to_cpu(disk->objectid);
2047 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2048 const struct btrfs_key *cpu)
2050 disk->offset = cpu_to_le64(cpu->offset);
2051 disk->type = cpu->type;
2052 disk->objectid = cpu_to_le64(cpu->objectid);
2055 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2056 struct btrfs_key *key, int nr)
2058 struct btrfs_disk_key disk_key;
2059 btrfs_node_key(eb, &disk_key, nr);
2060 btrfs_disk_key_to_cpu(key, &disk_key);
2063 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2064 struct btrfs_key *key, int nr)
2066 struct btrfs_disk_key disk_key;
2067 btrfs_item_key(eb, &disk_key, nr);
2068 btrfs_disk_key_to_cpu(key, &disk_key);
2071 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2072 const struct btrfs_dir_item *item,
2073 struct btrfs_key *key)
2075 struct btrfs_disk_key disk_key;
2076 btrfs_dir_item_key(eb, item, &disk_key);
2077 btrfs_disk_key_to_cpu(key, &disk_key);
2080 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2085 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2090 /* struct btrfs_header */
2091 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2092 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2094 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2095 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2096 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2097 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2098 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2100 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2101 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2103 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2105 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2107 return (btrfs_header_flags(eb) & flag) == flag;
2110 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2112 u64 flags = btrfs_header_flags(eb);
2113 btrfs_set_header_flags(eb, flags | flag);
2114 return (flags & flag) == flag;
2117 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2119 u64 flags = btrfs_header_flags(eb);
2120 btrfs_set_header_flags(eb, flags & ~flag);
2121 return (flags & flag) == flag;
2124 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2126 u64 flags = btrfs_header_flags(eb);
2127 return flags >> BTRFS_BACKREF_REV_SHIFT;
2130 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2133 u64 flags = btrfs_header_flags(eb);
2134 flags &= ~BTRFS_BACKREF_REV_MASK;
2135 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2136 btrfs_set_header_flags(eb, flags);
2139 static inline unsigned long btrfs_header_fsid(void)
2141 return offsetof(struct btrfs_header, fsid);
2144 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2146 return offsetof(struct btrfs_header, chunk_tree_uuid);
2149 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2151 return btrfs_header_level(eb) == 0;
2154 /* struct btrfs_root_item */
2155 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2157 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2158 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2159 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2161 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2163 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2164 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2165 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2166 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2167 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2168 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2169 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2170 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2172 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2174 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2176 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2178 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2180 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2183 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2185 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2188 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2190 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2193 /* struct btrfs_root_backup */
2194 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2196 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2198 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2199 tree_root_level, 8);
2201 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2203 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2204 chunk_root_gen, 64);
2205 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2206 chunk_root_level, 8);
2208 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2210 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2211 extent_root_gen, 64);
2212 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2213 extent_root_level, 8);
2215 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2217 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2219 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2222 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2224 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2226 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2229 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2231 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2233 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2234 csum_root_level, 8);
2235 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2237 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2239 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2242 /* struct btrfs_balance_item */
2243 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2245 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2246 const struct btrfs_balance_item *bi,
2247 struct btrfs_disk_balance_args *ba)
2249 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2252 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2253 struct btrfs_balance_item *bi,
2254 const struct btrfs_disk_balance_args *ba)
2256 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2259 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2260 const struct btrfs_balance_item *bi,
2261 struct btrfs_disk_balance_args *ba)
2263 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2266 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2267 struct btrfs_balance_item *bi,
2268 const struct btrfs_disk_balance_args *ba)
2270 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2273 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2274 const struct btrfs_balance_item *bi,
2275 struct btrfs_disk_balance_args *ba)
2277 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2280 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2281 struct btrfs_balance_item *bi,
2282 const struct btrfs_disk_balance_args *ba)
2284 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2288 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2289 const struct btrfs_disk_balance_args *disk)
2291 memset(cpu, 0, sizeof(*cpu));
2293 cpu->profiles = le64_to_cpu(disk->profiles);
2294 cpu->usage = le64_to_cpu(disk->usage);
2295 cpu->devid = le64_to_cpu(disk->devid);
2296 cpu->pstart = le64_to_cpu(disk->pstart);
2297 cpu->pend = le64_to_cpu(disk->pend);
2298 cpu->vstart = le64_to_cpu(disk->vstart);
2299 cpu->vend = le64_to_cpu(disk->vend);
2300 cpu->target = le64_to_cpu(disk->target);
2301 cpu->flags = le64_to_cpu(disk->flags);
2302 cpu->limit = le64_to_cpu(disk->limit);
2303 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2304 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2308 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2309 const struct btrfs_balance_args *cpu)
2311 memset(disk, 0, sizeof(*disk));
2313 disk->profiles = cpu_to_le64(cpu->profiles);
2314 disk->usage = cpu_to_le64(cpu->usage);
2315 disk->devid = cpu_to_le64(cpu->devid);
2316 disk->pstart = cpu_to_le64(cpu->pstart);
2317 disk->pend = cpu_to_le64(cpu->pend);
2318 disk->vstart = cpu_to_le64(cpu->vstart);
2319 disk->vend = cpu_to_le64(cpu->vend);
2320 disk->target = cpu_to_le64(cpu->target);
2321 disk->flags = cpu_to_le64(cpu->flags);
2322 disk->limit = cpu_to_le64(cpu->limit);
2323 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2324 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2327 /* struct btrfs_super_block */
2328 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2329 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2330 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2332 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2333 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2334 struct btrfs_super_block, sys_chunk_array_size, 32);
2335 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2336 struct btrfs_super_block, chunk_root_generation, 64);
2337 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2339 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2341 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2342 chunk_root_level, 8);
2343 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2345 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2346 log_root_transid, 64);
2347 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2349 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2351 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2353 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2355 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2357 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2359 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2360 root_dir_objectid, 64);
2361 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2363 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2365 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2366 compat_ro_flags, 64);
2367 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2368 incompat_flags, 64);
2369 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2371 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2372 cache_generation, 64);
2373 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2374 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2375 uuid_tree_generation, 64);
2377 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2379 u16 t = btrfs_super_csum_type(s);
2381 * csum type is validated at mount time
2383 return btrfs_csum_sizes[t];
2388 * The leaf data grows from end-to-front in the node.
2389 * this returns the address of the start of the last item,
2390 * which is the stop of the leaf data stack
2392 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2393 const struct extent_buffer *leaf)
2395 u32 nr = btrfs_header_nritems(leaf);
2398 return BTRFS_LEAF_DATA_SIZE(fs_info);
2399 return btrfs_item_offset_nr(leaf, nr - 1);
2402 /* struct btrfs_file_extent_item */
2403 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2404 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2405 struct btrfs_file_extent_item, disk_bytenr, 64);
2406 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2407 struct btrfs_file_extent_item, offset, 64);
2408 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2409 struct btrfs_file_extent_item, generation, 64);
2410 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2411 struct btrfs_file_extent_item, num_bytes, 64);
2412 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2413 struct btrfs_file_extent_item, disk_num_bytes, 64);
2414 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2415 struct btrfs_file_extent_item, compression, 8);
2417 static inline unsigned long
2418 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2420 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2423 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2425 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2428 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2430 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2432 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2433 disk_num_bytes, 64);
2434 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2436 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2438 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2440 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2442 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2444 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2445 other_encoding, 16);
2448 * this returns the number of bytes used by the item on disk, minus the
2449 * size of any extent headers. If a file is compressed on disk, this is
2450 * the compressed size
2452 static inline u32 btrfs_file_extent_inline_item_len(
2453 const struct extent_buffer *eb,
2454 struct btrfs_item *e)
2456 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2459 /* btrfs_dev_stats_item */
2460 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2461 const struct btrfs_dev_stats_item *ptr,
2466 read_extent_buffer(eb, &val,
2467 offsetof(struct btrfs_dev_stats_item, values) +
2468 ((unsigned long)ptr) + (index * sizeof(u64)),
2473 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2474 struct btrfs_dev_stats_item *ptr,
2477 write_extent_buffer(eb, &val,
2478 offsetof(struct btrfs_dev_stats_item, values) +
2479 ((unsigned long)ptr) + (index * sizeof(u64)),
2483 /* btrfs_qgroup_status_item */
2484 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2486 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2488 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2490 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2493 /* btrfs_qgroup_info_item */
2494 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2496 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2497 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2499 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2500 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2503 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2504 struct btrfs_qgroup_info_item, generation, 64);
2505 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2507 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2508 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2509 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2511 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2512 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2514 /* btrfs_qgroup_limit_item */
2515 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2517 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2519 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2521 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2523 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2526 /* btrfs_dev_replace_item */
2527 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2528 struct btrfs_dev_replace_item, src_devid, 64);
2529 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2530 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2532 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2534 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2536 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2538 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2539 num_write_errors, 64);
2540 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2541 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2543 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2545 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2548 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2549 struct btrfs_dev_replace_item, src_devid, 64);
2550 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2551 struct btrfs_dev_replace_item,
2552 cont_reading_from_srcdev_mode, 64);
2553 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2554 struct btrfs_dev_replace_item, replace_state, 64);
2555 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2556 struct btrfs_dev_replace_item, time_started, 64);
2557 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2558 struct btrfs_dev_replace_item, time_stopped, 64);
2559 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2560 struct btrfs_dev_replace_item, num_write_errors, 64);
2561 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2562 struct btrfs_dev_replace_item,
2563 num_uncorrectable_read_errors, 64);
2564 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2565 struct btrfs_dev_replace_item, cursor_left, 64);
2566 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2567 struct btrfs_dev_replace_item, cursor_right, 64);
2569 /* helper function to cast into the data area of the leaf. */
2570 #define btrfs_item_ptr(leaf, slot, type) \
2571 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2572 btrfs_item_offset_nr(leaf, slot)))
2574 #define btrfs_item_ptr_offset(leaf, slot) \
2575 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2576 btrfs_item_offset_nr(leaf, slot)))
2578 static inline u64 btrfs_name_hash(const char *name, int len)
2580 return crc32c((u32)~1, name, len);
2584 * Figure the key offset of an extended inode ref
2586 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2589 return (u64) crc32c(parent_objectid, name, len);
2592 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2594 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2595 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2598 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2600 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2605 enum btrfs_inline_ref_type {
2606 BTRFS_REF_TYPE_INVALID = 0,
2607 BTRFS_REF_TYPE_BLOCK = 1,
2608 BTRFS_REF_TYPE_DATA = 2,
2609 BTRFS_REF_TYPE_ANY = 3,
2612 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2613 struct btrfs_extent_inline_ref *iref,
2614 enum btrfs_inline_ref_type is_data);
2616 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2618 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2621 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2625 * Doing a truncate won't result in new nodes or leaves, just what we need for
2628 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2631 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2634 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans);
2635 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans);
2636 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2638 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2639 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2640 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2641 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2642 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2643 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2644 unsigned long count);
2645 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2646 unsigned long count, u64 transid, int wait);
2647 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2648 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2649 struct btrfs_fs_info *fs_info, u64 bytenr,
2650 u64 offset, int metadata, u64 *refs, u64 *flags);
2651 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2652 u64 bytenr, u64 num, int reserved);
2653 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2654 u64 bytenr, u64 num_bytes);
2655 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2656 struct extent_buffer *eb);
2657 int btrfs_cross_ref_exist(struct btrfs_root *root,
2658 u64 objectid, u64 offset, u64 bytenr);
2659 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2660 struct btrfs_fs_info *info,
2662 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2663 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2664 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2665 struct btrfs_root *root,
2666 u64 parent, u64 root_objectid,
2667 const struct btrfs_disk_key *key,
2668 int level, u64 hint,
2670 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2671 struct btrfs_root *root,
2672 struct extent_buffer *buf,
2673 u64 parent, int last_ref);
2674 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2675 struct btrfs_root *root, u64 owner,
2676 u64 offset, u64 ram_bytes,
2677 struct btrfs_key *ins);
2678 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2679 u64 root_objectid, u64 owner, u64 offset,
2680 struct btrfs_key *ins);
2681 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2682 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2683 struct btrfs_key *ins, int is_data, int delalloc);
2684 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2685 struct extent_buffer *buf, int full_backref);
2686 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2687 struct extent_buffer *buf, int full_backref);
2688 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2689 struct btrfs_fs_info *fs_info,
2690 u64 bytenr, u64 num_bytes, u64 flags,
2691 int level, int is_data);
2692 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2693 struct btrfs_root *root,
2694 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2695 u64 owner, u64 offset);
2697 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2698 u64 start, u64 len, int delalloc);
2699 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2700 u64 start, u64 len);
2701 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2702 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2703 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2704 struct btrfs_root *root,
2705 u64 bytenr, u64 num_bytes, u64 parent,
2706 u64 root_objectid, u64 owner, u64 offset);
2708 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2709 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2710 struct btrfs_fs_info *fs_info);
2711 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2712 struct btrfs_fs_info *fs_info);
2713 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2714 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2715 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2716 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2717 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2718 u64 bytes_used, u64 type, u64 chunk_offset,
2720 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2721 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2722 struct btrfs_fs_info *fs_info,
2723 const u64 chunk_offset);
2724 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2725 u64 group_start, struct extent_map *em);
2726 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2727 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2728 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2729 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2730 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2731 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2732 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2733 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2735 enum btrfs_reserve_flush_enum {
2736 /* If we are in the transaction, we can't flush anything.*/
2737 BTRFS_RESERVE_NO_FLUSH,
2739 * Flushing delalloc may cause deadlock somewhere, in this
2740 * case, use FLUSH LIMIT
2742 BTRFS_RESERVE_FLUSH_LIMIT,
2743 BTRFS_RESERVE_FLUSH_ALL,
2746 enum btrfs_flush_state {
2747 FLUSH_DELAYED_ITEMS_NR = 1,
2748 FLUSH_DELAYED_ITEMS = 2,
2750 FLUSH_DELALLOC_WAIT = 4,
2755 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2756 int btrfs_check_data_free_space(struct inode *inode,
2757 struct extent_changeset **reserved, u64 start, u64 len);
2758 void btrfs_free_reserved_data_space(struct inode *inode,
2759 struct extent_changeset *reserved, u64 start, u64 len);
2760 void btrfs_delalloc_release_space(struct inode *inode,
2761 struct extent_changeset *reserved,
2762 u64 start, u64 len, bool qgroup_free);
2763 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2765 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2766 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2767 struct btrfs_block_rsv *rsv,
2768 int nitems, bool use_global_rsv);
2769 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2770 struct btrfs_block_rsv *rsv);
2771 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2774 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2775 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2777 int btrfs_delalloc_reserve_space(struct inode *inode,
2778 struct extent_changeset **reserved, u64 start, u64 len);
2779 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2780 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2781 unsigned short type);
2782 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2783 struct btrfs_block_rsv *rsv,
2784 unsigned short type);
2785 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2786 struct btrfs_block_rsv *rsv);
2787 int btrfs_block_rsv_add(struct btrfs_root *root,
2788 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2789 enum btrfs_reserve_flush_enum flush);
2790 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2791 int btrfs_block_rsv_refill(struct btrfs_root *root,
2792 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2793 enum btrfs_reserve_flush_enum flush);
2794 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2795 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2797 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2798 struct btrfs_block_rsv *dest, u64 num_bytes,
2800 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2801 struct btrfs_block_rsv *block_rsv,
2803 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2804 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2805 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2806 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2807 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2808 u64 start, u64 end);
2809 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2810 u64 num_bytes, u64 *actual_bytes);
2811 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2812 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2814 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2815 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2816 struct btrfs_fs_info *fs_info);
2817 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2818 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2819 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2820 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2821 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2822 u64 start, u64 end);
2823 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2826 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2827 int level, int *slot);
2828 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2829 int btrfs_previous_item(struct btrfs_root *root,
2830 struct btrfs_path *path, u64 min_objectid,
2832 int btrfs_previous_extent_item(struct btrfs_root *root,
2833 struct btrfs_path *path, u64 min_objectid);
2834 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2835 struct btrfs_path *path,
2836 const struct btrfs_key *new_key);
2837 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2838 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2839 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2840 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2841 struct btrfs_key *key, int lowest_level,
2843 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2844 struct btrfs_path *path,
2846 enum btrfs_compare_tree_result {
2847 BTRFS_COMPARE_TREE_NEW,
2848 BTRFS_COMPARE_TREE_DELETED,
2849 BTRFS_COMPARE_TREE_CHANGED,
2850 BTRFS_COMPARE_TREE_SAME,
2852 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2853 struct btrfs_path *right_path,
2854 struct btrfs_key *key,
2855 enum btrfs_compare_tree_result result,
2857 int btrfs_compare_trees(struct btrfs_root *left_root,
2858 struct btrfs_root *right_root,
2859 btrfs_changed_cb_t cb, void *ctx);
2860 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2861 struct btrfs_root *root, struct extent_buffer *buf,
2862 struct extent_buffer *parent, int parent_slot,
2863 struct extent_buffer **cow_ret);
2864 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2865 struct btrfs_root *root,
2866 struct extent_buffer *buf,
2867 struct extent_buffer **cow_ret, u64 new_root_objectid);
2868 int btrfs_block_can_be_shared(struct btrfs_root *root,
2869 struct extent_buffer *buf);
2870 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2872 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2873 struct btrfs_path *path, u32 new_size, int from_end);
2874 int btrfs_split_item(struct btrfs_trans_handle *trans,
2875 struct btrfs_root *root,
2876 struct btrfs_path *path,
2877 const struct btrfs_key *new_key,
2878 unsigned long split_offset);
2879 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2880 struct btrfs_root *root,
2881 struct btrfs_path *path,
2882 const struct btrfs_key *new_key);
2883 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2884 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2885 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2886 const struct btrfs_key *key, struct btrfs_path *p,
2887 int ins_len, int cow);
2888 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2889 struct btrfs_path *p, u64 time_seq);
2890 int btrfs_search_slot_for_read(struct btrfs_root *root,
2891 const struct btrfs_key *key,
2892 struct btrfs_path *p, int find_higher,
2894 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2895 struct btrfs_root *root, struct extent_buffer *parent,
2896 int start_slot, u64 *last_ret,
2897 struct btrfs_key *progress);
2898 void btrfs_release_path(struct btrfs_path *p);
2899 struct btrfs_path *btrfs_alloc_path(void);
2900 void btrfs_free_path(struct btrfs_path *p);
2901 void btrfs_set_path_blocking(struct btrfs_path *p);
2902 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2904 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2905 struct btrfs_path *path, int slot, int nr);
2906 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2907 struct btrfs_root *root,
2908 struct btrfs_path *path)
2910 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2913 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2914 const struct btrfs_key *cpu_key, u32 *data_size,
2915 u32 total_data, u32 total_size, int nr);
2916 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2917 const struct btrfs_key *key, void *data, u32 data_size);
2918 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2919 struct btrfs_root *root,
2920 struct btrfs_path *path,
2921 const struct btrfs_key *cpu_key, u32 *data_size,
2924 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2925 struct btrfs_root *root,
2926 struct btrfs_path *path,
2927 const struct btrfs_key *key,
2930 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2933 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2934 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2935 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2937 static inline int btrfs_next_old_item(struct btrfs_root *root,
2938 struct btrfs_path *p, u64 time_seq)
2941 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2942 return btrfs_next_old_leaf(root, p, time_seq);
2945 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2947 return btrfs_next_old_item(root, p, 0);
2949 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2950 struct extent_buffer *leaf);
2951 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2952 struct btrfs_block_rsv *block_rsv,
2953 int update_ref, int for_reloc);
2954 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2955 struct btrfs_root *root,
2956 struct extent_buffer *node,
2957 struct extent_buffer *parent);
2958 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2961 * Do it this way so we only ever do one test_bit in the normal case.
2963 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2964 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2972 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2973 * anything except sleeping. This function is used to check the status of
2976 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2978 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2981 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2983 kfree(fs_info->balance_ctl);
2984 kfree(fs_info->delayed_root);
2985 kfree(fs_info->extent_root);
2986 kfree(fs_info->tree_root);
2987 kfree(fs_info->chunk_root);
2988 kfree(fs_info->dev_root);
2989 kfree(fs_info->csum_root);
2990 kfree(fs_info->quota_root);
2991 kfree(fs_info->uuid_root);
2992 kfree(fs_info->free_space_root);
2993 kfree(fs_info->super_copy);
2994 kfree(fs_info->super_for_commit);
2995 security_free_mnt_opts(&fs_info->security_opts);
2999 /* tree mod log functions from ctree.c */
3000 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3001 struct seq_list *elem);
3002 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3003 struct seq_list *elem);
3004 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3007 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3008 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3010 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3011 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3013 int btrfs_del_root(struct btrfs_trans_handle *trans,
3014 const struct btrfs_key *key);
3015 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3016 const struct btrfs_key *key,
3017 struct btrfs_root_item *item);
3018 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3019 struct btrfs_root *root,
3020 struct btrfs_key *key,
3021 struct btrfs_root_item *item);
3022 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3023 struct btrfs_path *path, struct btrfs_root_item *root_item,
3024 struct btrfs_key *root_key);
3025 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3026 void btrfs_set_root_node(struct btrfs_root_item *item,
3027 struct extent_buffer *node);
3028 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3029 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3030 struct btrfs_root *root);
3033 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3035 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3037 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3038 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3042 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3043 const char *name, int name_len);
3044 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3045 int name_len, struct btrfs_inode *dir,
3046 struct btrfs_key *location, u8 type, u64 index);
3047 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3048 struct btrfs_root *root,
3049 struct btrfs_path *path, u64 dir,
3050 const char *name, int name_len,
3052 struct btrfs_dir_item *
3053 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3054 struct btrfs_root *root,
3055 struct btrfs_path *path, u64 dir,
3056 u64 objectid, const char *name, int name_len,
3058 struct btrfs_dir_item *
3059 btrfs_search_dir_index_item(struct btrfs_root *root,
3060 struct btrfs_path *path, u64 dirid,
3061 const char *name, int name_len);
3062 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3063 struct btrfs_root *root,
3064 struct btrfs_path *path,
3065 struct btrfs_dir_item *di);
3066 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3067 struct btrfs_root *root,
3068 struct btrfs_path *path, u64 objectid,
3069 const char *name, u16 name_len,
3070 const void *data, u16 data_len);
3071 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3072 struct btrfs_root *root,
3073 struct btrfs_path *path, u64 dir,
3074 const char *name, u16 name_len,
3076 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3077 struct btrfs_path *path,
3082 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3083 struct btrfs_root *root, u64 offset);
3084 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3085 struct btrfs_root *root, u64 offset);
3086 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3089 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3090 struct btrfs_root *root,
3091 const char *name, int name_len,
3092 u64 inode_objectid, u64 ref_objectid, u64 index);
3093 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3094 struct btrfs_root *root,
3095 const char *name, int name_len,
3096 u64 inode_objectid, u64 ref_objectid, u64 *index);
3097 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3098 struct btrfs_root *root,
3099 struct btrfs_path *path, u64 objectid);
3100 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3101 *root, struct btrfs_path *path,
3102 struct btrfs_key *location, int mod);
3104 struct btrfs_inode_extref *
3105 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3106 struct btrfs_root *root,
3107 struct btrfs_path *path,
3108 const char *name, int name_len,
3109 u64 inode_objectid, u64 ref_objectid, int ins_len,
3112 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3114 int name_len, struct btrfs_inode_ref **ref_ret);
3115 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3116 u64 ref_objectid, const char *name,
3118 struct btrfs_inode_extref **extref_ret);
3121 struct btrfs_dio_private;
3122 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3123 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3124 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3125 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3126 u64 logical_offset);
3127 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3128 struct btrfs_root *root,
3129 u64 objectid, u64 pos,
3130 u64 disk_offset, u64 disk_num_bytes,
3131 u64 num_bytes, u64 offset, u64 ram_bytes,
3132 u8 compression, u8 encryption, u16 other_encoding);
3133 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3134 struct btrfs_root *root,
3135 struct btrfs_path *path, u64 objectid,
3136 u64 bytenr, int mod);
3137 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3138 struct btrfs_root *root,
3139 struct btrfs_ordered_sum *sums);
3140 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3141 u64 file_start, int contig);
3142 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3143 struct list_head *list, int search_commit);
3144 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3145 const struct btrfs_path *path,
3146 struct btrfs_file_extent_item *fi,
3147 const bool new_inline,
3148 struct extent_map *em);
3151 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3152 struct page *page, size_t pg_offset, u64 start,
3153 u64 len, int create);
3154 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3155 u64 *orig_start, u64 *orig_block_len,
3158 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3159 struct btrfs_inode *inode);
3160 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3161 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3162 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_inode *dir, struct btrfs_inode *inode,
3165 const char *name, int name_len);
3166 int btrfs_add_link(struct btrfs_trans_handle *trans,
3167 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3168 const char *name, int name_len, int add_backref, u64 index);
3169 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3170 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3172 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3173 struct btrfs_root *root,
3174 struct inode *inode, u64 new_size,
3177 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3178 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3179 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3180 unsigned int extra_bits,
3181 struct extent_state **cached_state, int dedupe);
3182 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3183 struct btrfs_root *new_root,
3184 struct btrfs_root *parent_root,
3186 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3188 void btrfs_clear_delalloc_extent(struct inode *inode,
3189 struct extent_state *state, unsigned *bits);
3190 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3191 struct extent_state *other);
3192 void btrfs_split_delalloc_extent(struct inode *inode,
3193 struct extent_state *orig, u64 split);
3194 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3195 size_t size, struct bio *bio,
3196 unsigned long bio_flags);
3197 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3198 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3199 int btrfs_readpage(struct file *file, struct page *page);
3200 void btrfs_evict_inode(struct inode *inode);
3201 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3202 struct inode *btrfs_alloc_inode(struct super_block *sb);
3203 void btrfs_destroy_inode(struct inode *inode);
3204 int btrfs_drop_inode(struct inode *inode);
3205 int __init btrfs_init_cachep(void);
3206 void __cold btrfs_destroy_cachep(void);
3207 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3208 struct btrfs_root *root, int *new,
3209 struct btrfs_path *path);
3210 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3211 struct btrfs_root *root, int *was_new);
3212 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3213 struct page *page, size_t pg_offset,
3214 u64 start, u64 end, int create);
3215 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3216 struct btrfs_root *root,
3217 struct inode *inode);
3218 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3219 struct btrfs_root *root, struct inode *inode);
3220 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3221 struct btrfs_inode *inode);
3222 int btrfs_orphan_cleanup(struct btrfs_root *root);
3223 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3224 void btrfs_add_delayed_iput(struct inode *inode);
3225 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3226 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3227 u64 start, u64 num_bytes, u64 min_size,
3228 loff_t actual_len, u64 *alloc_hint);
3229 int btrfs_prealloc_file_range_trans(struct inode *inode,
3230 struct btrfs_trans_handle *trans, int mode,
3231 u64 start, u64 num_bytes, u64 min_size,
3232 loff_t actual_len, u64 *alloc_hint);
3233 int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
3234 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3235 struct writeback_control *wbc);
3236 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3237 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3238 u64 end, int uptodate);
3239 extern const struct dentry_operations btrfs_dentry_operations;
3242 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3243 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3244 int btrfs_ioctl_get_supported_features(void __user *arg);
3245 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3246 int btrfs_is_empty_uuid(u8 *uuid);
3247 int btrfs_defrag_file(struct inode *inode, struct file *file,
3248 struct btrfs_ioctl_defrag_range_args *range,
3249 u64 newer_than, unsigned long max_pages);
3250 void btrfs_get_block_group_info(struct list_head *groups_list,
3251 struct btrfs_ioctl_space_info *space);
3252 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3253 struct btrfs_ioctl_balance_args *bargs);
3256 int __init btrfs_auto_defrag_init(void);
3257 void __cold btrfs_auto_defrag_exit(void);
3258 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3259 struct btrfs_inode *inode);
3260 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3261 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3262 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3263 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3265 extern const struct file_operations btrfs_file_operations;
3266 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3267 struct btrfs_root *root, struct inode *inode,
3268 struct btrfs_path *path, u64 start, u64 end,
3269 u64 *drop_end, int drop_cache,
3271 u32 extent_item_size,
3273 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3274 struct btrfs_root *root, struct inode *inode, u64 start,
3275 u64 end, int drop_cache);
3276 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3277 struct btrfs_inode *inode, u64 start, u64 end);
3278 int btrfs_release_file(struct inode *inode, struct file *file);
3279 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3280 size_t num_pages, loff_t pos, size_t write_bytes,
3281 struct extent_state **cached);
3282 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3283 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
3284 struct file *file_out, loff_t pos_out,
3285 loff_t len, unsigned int remap_flags);
3288 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3289 struct btrfs_root *root);
3292 int __init btrfs_init_sysfs(void);
3293 void __cold btrfs_exit_sysfs(void);
3294 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3295 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3298 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3299 unsigned long new_flags);
3300 int btrfs_sync_fs(struct super_block *sb, int wait);
3302 static inline __printf(2, 3) __cold
3303 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3307 #ifdef CONFIG_PRINTK
3310 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3312 #define btrfs_printk(fs_info, fmt, args...) \
3313 btrfs_no_printk(fs_info, fmt, ##args)
3316 #define btrfs_emerg(fs_info, fmt, args...) \
3317 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3318 #define btrfs_alert(fs_info, fmt, args...) \
3319 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3320 #define btrfs_crit(fs_info, fmt, args...) \
3321 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3322 #define btrfs_err(fs_info, fmt, args...) \
3323 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3324 #define btrfs_warn(fs_info, fmt, args...) \
3325 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3326 #define btrfs_notice(fs_info, fmt, args...) \
3327 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3328 #define btrfs_info(fs_info, fmt, args...) \
3329 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3332 * Wrappers that use printk_in_rcu
3334 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3335 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3336 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3337 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3338 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3339 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3340 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3341 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3342 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3343 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3344 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3345 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3346 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3347 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3350 * Wrappers that use a ratelimited printk_in_rcu
3352 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3353 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3354 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3355 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3356 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3357 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3358 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3359 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3360 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3361 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3362 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3363 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3364 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3365 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3368 * Wrappers that use a ratelimited printk
3370 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3371 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3372 #define btrfs_alert_rl(fs_info, fmt, args...) \
3373 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3374 #define btrfs_crit_rl(fs_info, fmt, args...) \
3375 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3376 #define btrfs_err_rl(fs_info, fmt, args...) \
3377 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3378 #define btrfs_warn_rl(fs_info, fmt, args...) \
3379 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3380 #define btrfs_notice_rl(fs_info, fmt, args...) \
3381 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3382 #define btrfs_info_rl(fs_info, fmt, args...) \
3383 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3385 #if defined(CONFIG_DYNAMIC_DEBUG)
3386 #define btrfs_debug(fs_info, fmt, args...) \
3388 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3389 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3390 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3392 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3394 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3395 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3396 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3398 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3400 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3401 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3402 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3405 #define btrfs_debug_rl(fs_info, fmt, args...) \
3407 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3408 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3409 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3412 #elif defined(DEBUG)
3413 #define btrfs_debug(fs_info, fmt, args...) \
3414 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3415 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3416 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3417 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3418 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3419 #define btrfs_debug_rl(fs_info, fmt, args...) \
3420 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3422 #define btrfs_debug(fs_info, fmt, args...) \
3423 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3424 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3425 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3426 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3427 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3428 #define btrfs_debug_rl(fs_info, fmt, args...) \
3429 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3432 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3435 btrfs_printk(fs_info, fmt, ##args); \
3436 rcu_read_unlock(); \
3439 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3442 btrfs_no_printk(fs_info, fmt, ##args); \
3443 rcu_read_unlock(); \
3446 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3448 static DEFINE_RATELIMIT_STATE(_rs, \
3449 DEFAULT_RATELIMIT_INTERVAL, \
3450 DEFAULT_RATELIMIT_BURST); \
3451 if (__ratelimit(&_rs)) \
3452 btrfs_printk(fs_info, fmt, ##args); \
3455 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3458 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3459 rcu_read_unlock(); \
3462 #ifdef CONFIG_BTRFS_ASSERT
3465 static inline void assfail(const char *expr, const char *file, int line)
3467 pr_err("assertion failed: %s, file: %s, line: %d\n",
3472 #define ASSERT(expr) \
3473 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3475 #define ASSERT(expr) ((void)0)
3479 * Use that for functions that are conditionally exported for sanity tests but
3482 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3483 #define EXPORT_FOR_TESTS static
3485 #define EXPORT_FOR_TESTS
3489 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3492 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3497 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3498 unsigned int line, int errno, const char *fmt, ...);
3500 const char *btrfs_decode_error(int errno);
3503 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3504 const char *function,
3505 unsigned int line, int errno);
3508 * Call btrfs_abort_transaction as early as possible when an error condition is
3509 * detected, that way the exact line number is reported.
3511 #define btrfs_abort_transaction(trans, errno) \
3513 /* Report first abort since mount */ \
3514 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3515 &((trans)->fs_info->fs_state))) { \
3516 if ((errno) != -EIO) { \
3517 WARN(1, KERN_DEBUG \
3518 "BTRFS: Transaction aborted (error %d)\n", \
3521 btrfs_debug((trans)->fs_info, \
3522 "Transaction aborted (error %d)", \
3526 __btrfs_abort_transaction((trans), __func__, \
3527 __LINE__, (errno)); \
3530 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3532 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3533 (errno), fmt, ##args); \
3538 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3539 unsigned int line, int errno, const char *fmt, ...);
3541 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3542 * will panic(). Otherwise we BUG() here.
3544 #define btrfs_panic(fs_info, errno, fmt, args...) \
3546 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3551 /* compatibility and incompatibility defines */
3553 #define btrfs_set_fs_incompat(__fs_info, opt) \
3554 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3556 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3559 struct btrfs_super_block *disk_super;
3562 disk_super = fs_info->super_copy;
3563 features = btrfs_super_incompat_flags(disk_super);
3564 if (!(features & flag)) {
3565 spin_lock(&fs_info->super_lock);
3566 features = btrfs_super_incompat_flags(disk_super);
3567 if (!(features & flag)) {
3569 btrfs_set_super_incompat_flags(disk_super, features);
3570 btrfs_info(fs_info, "setting %llu feature flag",
3573 spin_unlock(&fs_info->super_lock);
3577 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3578 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3580 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3583 struct btrfs_super_block *disk_super;
3586 disk_super = fs_info->super_copy;
3587 features = btrfs_super_incompat_flags(disk_super);
3588 if (features & flag) {
3589 spin_lock(&fs_info->super_lock);
3590 features = btrfs_super_incompat_flags(disk_super);
3591 if (features & flag) {
3593 btrfs_set_super_incompat_flags(disk_super, features);
3594 btrfs_info(fs_info, "clearing %llu feature flag",
3597 spin_unlock(&fs_info->super_lock);
3601 #define btrfs_fs_incompat(fs_info, opt) \
3602 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3604 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3606 struct btrfs_super_block *disk_super;
3607 disk_super = fs_info->super_copy;
3608 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3611 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3612 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3614 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3617 struct btrfs_super_block *disk_super;
3620 disk_super = fs_info->super_copy;
3621 features = btrfs_super_compat_ro_flags(disk_super);
3622 if (!(features & flag)) {
3623 spin_lock(&fs_info->super_lock);
3624 features = btrfs_super_compat_ro_flags(disk_super);
3625 if (!(features & flag)) {
3627 btrfs_set_super_compat_ro_flags(disk_super, features);
3628 btrfs_info(fs_info, "setting %llu ro feature flag",
3631 spin_unlock(&fs_info->super_lock);
3635 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3636 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3638 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3641 struct btrfs_super_block *disk_super;
3644 disk_super = fs_info->super_copy;
3645 features = btrfs_super_compat_ro_flags(disk_super);
3646 if (features & flag) {
3647 spin_lock(&fs_info->super_lock);
3648 features = btrfs_super_compat_ro_flags(disk_super);
3649 if (features & flag) {
3651 btrfs_set_super_compat_ro_flags(disk_super, features);
3652 btrfs_info(fs_info, "clearing %llu ro feature flag",
3655 spin_unlock(&fs_info->super_lock);
3659 #define btrfs_fs_compat_ro(fs_info, opt) \
3660 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3662 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3664 struct btrfs_super_block *disk_super;
3665 disk_super = fs_info->super_copy;
3666 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3670 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3671 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3672 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3673 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3674 struct inode *inode, struct inode *dir);
3676 #define btrfs_get_acl NULL
3677 #define btrfs_set_acl NULL
3678 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3679 struct inode *inode, struct inode *dir)
3686 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3687 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3688 struct btrfs_root *root);
3689 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3690 struct btrfs_root *root);
3691 int btrfs_recover_relocation(struct btrfs_root *root);
3692 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3693 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3694 struct btrfs_root *root, struct extent_buffer *buf,
3695 struct extent_buffer *cow);
3696 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3697 u64 *bytes_to_reserve);
3698 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3699 struct btrfs_pending_snapshot *pending);
3702 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3703 u64 end, struct btrfs_scrub_progress *progress,
3704 int readonly, int is_dev_replace);
3705 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3706 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3707 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3708 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3709 struct btrfs_device *dev);
3710 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3711 struct btrfs_scrub_progress *progress);
3712 static inline void btrfs_init_full_stripe_locks_tree(
3713 struct btrfs_full_stripe_locks_tree *locks_root)
3715 locks_root->root = RB_ROOT;
3716 mutex_init(&locks_root->lock);
3720 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3721 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3722 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3724 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3726 btrfs_bio_counter_sub(fs_info, 1);
3730 struct reada_control {
3731 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3732 struct btrfs_key key_start;
3733 struct btrfs_key key_end; /* exclusive */
3736 wait_queue_head_t wait;
3738 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3739 struct btrfs_key *start, struct btrfs_key *end);
3740 int btrfs_reada_wait(void *handle);
3741 void btrfs_reada_detach(void *handle);
3742 int btree_readahead_hook(struct extent_buffer *eb, int err);
3744 static inline int is_fstree(u64 rootid)
3746 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3747 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3748 !btrfs_qgroup_level(rootid)))
3753 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3755 return signal_pending(current);
3758 /* Sanity test specific functions */
3759 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3760 void btrfs_test_inode_set_ops(struct inode *inode);
3761 void btrfs_test_destroy_inode(struct inode *inode);
3763 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3765 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3768 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3774 static inline void cond_wake_up(struct wait_queue_head *wq)
3777 * This implies a full smp_mb barrier, see comments for
3778 * waitqueue_active why.
3780 if (wq_has_sleeper(wq))
3784 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3787 * Special case for conditional wakeup where the barrier required for
3788 * waitqueue_active is implied by some of the preceding code. Eg. one
3789 * of such atomic operations (atomic_dec_and_return, ...), or a
3790 * unlock/lock sequence, etc.
3792 if (waitqueue_active(wq))