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);
112 * Runtime (in-memory) states of filesystem
115 /* Global indicator of serious filesystem errors */
116 BTRFS_FS_STATE_ERROR,
118 * Filesystem is being remounted, allow to skip some operations, like
121 BTRFS_FS_STATE_REMOUNTING,
122 /* Track if a transaction abort has been reported on this filesystem */
123 BTRFS_FS_STATE_TRANS_ABORTED,
125 * Bio operations should be blocked on this filesystem because a source
126 * or target device is being destroyed as part of a device replace
128 BTRFS_FS_STATE_DEV_REPLACING,
129 /* The btrfs_fs_info created for self-tests */
130 BTRFS_FS_STATE_DUMMY_FS_INFO,
133 #define BTRFS_BACKREF_REV_MAX 256
134 #define BTRFS_BACKREF_REV_SHIFT 56
135 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
136 BTRFS_BACKREF_REV_SHIFT)
138 #define BTRFS_OLD_BACKREF_REV 0
139 #define BTRFS_MIXED_BACKREF_REV 1
142 * every tree block (leaf or node) starts with this header.
144 struct btrfs_header {
145 /* these first four must match the super block */
146 u8 csum[BTRFS_CSUM_SIZE];
147 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
148 __le64 bytenr; /* which block this node is supposed to live in */
151 /* allowed to be different from the super from here on down */
152 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
157 } __attribute__ ((__packed__));
160 * this is a very generous portion of the super block, giving us
161 * room to translate 14 chunks with 3 stripes each.
163 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
166 * just in case we somehow lose the roots and are not able to mount,
167 * we store an array of the roots from previous transactions
170 #define BTRFS_NUM_BACKUP_ROOTS 4
171 struct btrfs_root_backup {
173 __le64 tree_root_gen;
176 __le64 chunk_root_gen;
179 __le64 extent_root_gen;
188 __le64 csum_root_gen;
198 u8 extent_root_level;
202 /* future and to align */
204 } __attribute__ ((__packed__));
207 * the super block basically lists the main trees of the FS
208 * it currently lacks any block count etc etc
210 struct btrfs_super_block {
211 /* the first 4 fields must match struct btrfs_header */
212 u8 csum[BTRFS_CSUM_SIZE];
213 /* FS specific UUID, visible to user */
214 u8 fsid[BTRFS_FSID_SIZE];
215 __le64 bytenr; /* this block number */
218 /* allowed to be different from the btrfs_header from here own down */
225 /* this will help find the new super based on the log root */
226 __le64 log_root_transid;
229 __le64 root_dir_objectid;
233 __le32 __unused_leafsize;
235 __le32 sys_chunk_array_size;
236 __le64 chunk_root_generation;
238 __le64 compat_ro_flags;
239 __le64 incompat_flags;
244 struct btrfs_dev_item dev_item;
246 char label[BTRFS_LABEL_SIZE];
248 __le64 cache_generation;
249 __le64 uuid_tree_generation;
251 /* the UUID written into btree blocks */
252 u8 metadata_uuid[BTRFS_FSID_SIZE];
254 /* future expansion */
256 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
257 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
258 } __attribute__ ((__packed__));
261 * Compat flags that we support. If any incompat flags are set other than the
262 * ones specified below then we will fail to mount
264 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
265 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
266 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
268 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
269 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
270 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
272 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
273 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
275 #define BTRFS_FEATURE_INCOMPAT_SUPP \
276 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
277 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
278 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
279 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
280 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
281 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
282 BTRFS_FEATURE_INCOMPAT_RAID56 | \
283 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
284 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
285 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
286 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
288 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
289 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
290 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
293 * A leaf is full of items. offset and size tell us where to find
294 * the item in the leaf (relative to the start of the data area)
297 struct btrfs_disk_key key;
300 } __attribute__ ((__packed__));
303 * leaves have an item area and a data area:
304 * [item0, item1....itemN] [free space] [dataN...data1, data0]
306 * The data is separate from the items to get the keys closer together
310 struct btrfs_header header;
311 struct btrfs_item items[];
312 } __attribute__ ((__packed__));
315 * all non-leaf blocks are nodes, they hold only keys and pointers to
318 struct btrfs_key_ptr {
319 struct btrfs_disk_key key;
322 } __attribute__ ((__packed__));
325 struct btrfs_header header;
326 struct btrfs_key_ptr ptrs[];
327 } __attribute__ ((__packed__));
330 * btrfs_paths remember the path taken from the root down to the leaf.
331 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
332 * to any other levels that are present.
334 * The slots array records the index of the item or block pointer
335 * used while walking the tree.
337 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
339 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
340 int slots[BTRFS_MAX_LEVEL];
341 /* if there is real range locking, this locks field will change */
342 u8 locks[BTRFS_MAX_LEVEL];
344 /* keep some upper locks as we walk down */
348 * set by btrfs_split_item, tells search_slot to keep all locks
349 * and to force calls to keep space in the nodes
351 unsigned int search_for_split:1;
352 unsigned int keep_locks:1;
353 unsigned int skip_locking:1;
354 unsigned int leave_spinning:1;
355 unsigned int search_commit_root:1;
356 unsigned int need_commit_sem:1;
357 unsigned int skip_release_on_error:1;
359 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
360 sizeof(struct btrfs_item))
361 struct btrfs_dev_replace {
362 u64 replace_state; /* see #define above */
363 time64_t time_started; /* seconds since 1-Jan-1970 */
364 time64_t time_stopped; /* seconds since 1-Jan-1970 */
365 atomic64_t num_write_errors;
366 atomic64_t num_uncorrectable_read_errors;
369 u64 committed_cursor_left;
370 u64 cursor_left_last_write_of_item;
373 u64 cont_reading_from_srcdev_mode; /* see #define above */
376 int item_needs_writeback;
377 struct btrfs_device *srcdev;
378 struct btrfs_device *tgtdev;
380 struct mutex lock_finishing_cancel_unmount;
382 atomic_t blocking_readers;
383 wait_queue_head_t read_lock_wq;
385 struct btrfs_scrub_progress scrub_progress;
387 struct percpu_counter bio_counter;
388 wait_queue_head_t replace_wait;
391 /* For raid type sysfs entries */
392 struct raid_kobject {
395 struct list_head list;
398 struct btrfs_space_info {
401 u64 total_bytes; /* total bytes in the space,
402 this doesn't take mirrors into account */
403 u64 bytes_used; /* total bytes used,
404 this doesn't take mirrors into account */
405 u64 bytes_pinned; /* total bytes pinned, will be freed when the
406 transaction finishes */
407 u64 bytes_reserved; /* total bytes the allocator has reserved for
408 current allocations */
409 u64 bytes_may_use; /* number of bytes that may be used for
410 delalloc/allocations */
411 u64 bytes_readonly; /* total bytes that are read only */
413 u64 max_extent_size; /* This will hold the maximum extent size of
414 the space info if we had an ENOSPC in the
417 unsigned int full:1; /* indicates that we cannot allocate any more
418 chunks for this space */
419 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
421 unsigned int flush:1; /* set if we are trying to make space */
423 unsigned int force_alloc; /* set if we need to force a chunk
424 alloc for this space */
426 u64 disk_used; /* total bytes used on disk */
427 u64 disk_total; /* total bytes on disk, takes mirrors into
433 * bytes_pinned is kept in line with what is actually pinned, as in
434 * we've called update_block_group and dropped the bytes_used counter
435 * and increased the bytes_pinned counter. However this means that
436 * bytes_pinned does not reflect the bytes that will be pinned once the
437 * delayed refs are flushed, so this counter is inc'ed every time we
438 * call btrfs_free_extent so it is a realtime count of what will be
439 * freed once the transaction is committed. It will be zeroed every
440 * time the transaction commits.
442 struct percpu_counter total_bytes_pinned;
444 struct list_head list;
445 /* Protected by the spinlock 'lock'. */
446 struct list_head ro_bgs;
447 struct list_head priority_tickets;
448 struct list_head tickets;
450 * tickets_id just indicates the next ticket will be handled, so note
451 * it's not stored per ticket.
455 struct rw_semaphore groups_sem;
456 /* for block groups in our same type */
457 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
458 wait_queue_head_t wait;
461 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
465 * Types of block reserves
468 BTRFS_BLOCK_RSV_GLOBAL,
469 BTRFS_BLOCK_RSV_DELALLOC,
470 BTRFS_BLOCK_RSV_TRANS,
471 BTRFS_BLOCK_RSV_CHUNK,
472 BTRFS_BLOCK_RSV_DELOPS,
473 BTRFS_BLOCK_RSV_EMPTY,
474 BTRFS_BLOCK_RSV_TEMP,
477 struct btrfs_block_rsv {
480 struct btrfs_space_info *space_info;
484 unsigned short failfast;
487 * Qgroup equivalent for @size @reserved
489 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
490 * about things like csum size nor how many tree blocks it will need to
493 * Qgroup cares more about net change of the extent usage.
495 * So for one newly inserted file extent, in worst case it will cause
496 * leaf split and level increase, nodesize for each file extent is
499 * In short, qgroup_size/reserved is the upper limit of possible needed
500 * qgroup metadata reservation.
503 u64 qgroup_rsv_reserved;
507 * free clusters are used to claim free space in relatively large chunks,
508 * allowing us to do less seeky writes. They are used for all metadata
509 * allocations. In ssd_spread mode they are also used for data allocations.
511 struct btrfs_free_cluster {
513 spinlock_t refill_lock;
516 /* largest extent in this cluster */
519 /* first extent starting offset */
522 /* We did a full search and couldn't create a cluster */
525 struct btrfs_block_group_cache *block_group;
527 * when a cluster is allocated from a block group, we put the
528 * cluster onto a list in the block group so that it can
529 * be freed before the block group is freed.
531 struct list_head block_group_list;
534 enum btrfs_caching_type {
536 BTRFS_CACHE_STARTED = 1,
537 BTRFS_CACHE_FAST = 2,
538 BTRFS_CACHE_FINISHED = 3,
539 BTRFS_CACHE_ERROR = 4,
542 enum btrfs_disk_cache_state {
543 BTRFS_DC_WRITTEN = 0,
549 struct btrfs_caching_control {
550 struct list_head list;
552 wait_queue_head_t wait;
553 struct btrfs_work work;
554 struct btrfs_block_group_cache *block_group;
559 /* Once caching_thread() finds this much free space, it will wake up waiters. */
560 #define CACHING_CTL_WAKE_UP SZ_2M
562 struct btrfs_io_ctl {
566 struct btrfs_fs_info *fs_info;
573 unsigned check_crcs:1;
577 * Tree to record all locked full stripes of a RAID5/6 block group
579 struct btrfs_full_stripe_locks_tree {
584 struct btrfs_block_group_cache {
585 struct btrfs_key key;
586 struct btrfs_block_group_item item;
587 struct btrfs_fs_info *fs_info;
595 u64 cache_generation;
598 * If the free space extent count exceeds this number, convert the block
601 u32 bitmap_high_thresh;
604 * If the free space extent count drops below this number, convert the
605 * block group back to extents.
607 u32 bitmap_low_thresh;
610 * It is just used for the delayed data space allocation because
611 * only the data space allocation and the relative metadata update
612 * can be done cross the transaction.
614 struct rw_semaphore data_rwsem;
616 /* for raid56, this is a full stripe, without parity */
617 unsigned long full_stripe_len;
621 unsigned int has_caching_ctl:1;
622 unsigned int removed:1;
624 int disk_cache_state;
626 /* cache tracking stuff */
628 struct btrfs_caching_control *caching_ctl;
629 u64 last_byte_to_unpin;
631 struct btrfs_space_info *space_info;
633 /* free space cache stuff */
634 struct btrfs_free_space_ctl *free_space_ctl;
636 /* block group cache stuff */
637 struct rb_node cache_node;
639 /* for block groups in the same raid type */
640 struct list_head list;
645 /* List of struct btrfs_free_clusters for this block group.
646 * Today it will only have one thing on it, but that may change
648 struct list_head cluster_list;
650 /* For delayed block group creation or deletion of empty block groups */
651 struct list_head bg_list;
653 /* For read-only block groups */
654 struct list_head ro_list;
658 /* For dirty block groups */
659 struct list_head dirty_list;
660 struct list_head io_list;
662 struct btrfs_io_ctl io_ctl;
665 * Incremented when doing extent allocations and holding a read lock
666 * on the space_info's groups_sem semaphore.
667 * Decremented when an ordered extent that represents an IO against this
668 * block group's range is created (after it's added to its inode's
669 * root's list of ordered extents) or immediately after the allocation
670 * if it's a metadata extent or fallocate extent (for these cases we
671 * don't create ordered extents).
673 atomic_t reservations;
676 * Incremented while holding the spinlock *lock* by a task checking if
677 * it can perform a nocow write (incremented if the value for the *ro*
678 * field is 0). Decremented by such tasks once they create an ordered
679 * extent or before that if some error happens before reaching that step.
680 * This is to prevent races between block group relocation and nocow
681 * writes through direct IO.
683 atomic_t nocow_writers;
685 /* Lock for free space tree operations. */
686 struct mutex free_space_lock;
689 * Does the block group need to be added to the free space tree?
690 * Protected by free_space_lock.
692 int needs_free_space;
694 /* Record locked full stripes for RAID5/6 block group */
695 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
698 /* delayed seq elem */
700 struct list_head list;
704 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
706 #define SEQ_LAST ((u64)-1)
708 enum btrfs_orphan_cleanup_state {
709 ORPHAN_CLEANUP_STARTED = 1,
710 ORPHAN_CLEANUP_DONE = 2,
713 /* used by the raid56 code to lock stripes for read/modify/write */
714 struct btrfs_stripe_hash {
715 struct list_head hash_list;
719 /* used by the raid56 code to lock stripes for read/modify/write */
720 struct btrfs_stripe_hash_table {
721 struct list_head stripe_cache;
722 spinlock_t cache_lock;
724 struct btrfs_stripe_hash table[];
727 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
729 void btrfs_init_async_reclaim_work(struct work_struct *work);
732 struct reloc_control;
734 struct btrfs_fs_devices;
735 struct btrfs_balance_control;
736 struct btrfs_delayed_root;
739 * Block group or device which contains an active swapfile. Used for preventing
740 * unsafe operations while a swapfile is active.
742 * These are sorted on (ptr, inode) (note that a block group or device can
743 * contain more than one swapfile). We compare the pointer values because we
744 * don't actually care what the object is, we just need a quick check whether
745 * the object exists in the rbtree.
747 struct btrfs_swapfile_pin {
752 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
753 * ptr points to a struct btrfs_device.
758 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
762 BTRFS_FS_CLOSING_START,
763 BTRFS_FS_CLOSING_DONE,
764 BTRFS_FS_LOG_RECOVERING,
766 BTRFS_FS_QUOTA_ENABLED,
767 BTRFS_FS_UPDATE_UUID_TREE_GEN,
768 BTRFS_FS_CREATING_FREE_SPACE_TREE,
772 BTRFS_FS_QUOTA_OVERRIDE,
773 /* Used to record internally whether fs has been frozen */
776 * Indicate that a whole-filesystem exclusive operation is running
777 * (device replace, resize, device add/delete, balance)
781 * To info transaction_kthread we need an immediate commit so it
782 * doesn't need to wait for commit_interval
784 BTRFS_FS_NEED_ASYNC_COMMIT,
786 * Indicate that balance has been set up from the ioctl and is in the
787 * main phase. The fs_info::balance_ctl is initialized.
789 BTRFS_FS_BALANCE_RUNNING,
792 struct btrfs_fs_info {
793 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
795 struct btrfs_root *extent_root;
796 struct btrfs_root *tree_root;
797 struct btrfs_root *chunk_root;
798 struct btrfs_root *dev_root;
799 struct btrfs_root *fs_root;
800 struct btrfs_root *csum_root;
801 struct btrfs_root *quota_root;
802 struct btrfs_root *uuid_root;
803 struct btrfs_root *free_space_root;
805 /* the log root tree is a directory of all the other log roots */
806 struct btrfs_root *log_root_tree;
808 spinlock_t fs_roots_radix_lock;
809 struct radix_tree_root fs_roots_radix;
811 /* block group cache stuff */
812 spinlock_t block_group_cache_lock;
813 u64 first_logical_byte;
814 struct rb_root block_group_cache_tree;
816 /* keep track of unallocated space */
817 atomic64_t free_chunk_space;
819 struct extent_io_tree freed_extents[2];
820 struct extent_io_tree *pinned_extents;
822 /* logical->physical extent mapping */
823 struct btrfs_mapping_tree mapping_tree;
826 * block reservation for extent, checksum, root tree and
827 * delayed dir index item
829 struct btrfs_block_rsv global_block_rsv;
830 /* block reservation for metadata operations */
831 struct btrfs_block_rsv trans_block_rsv;
832 /* block reservation for chunk tree */
833 struct btrfs_block_rsv chunk_block_rsv;
834 /* block reservation for delayed operations */
835 struct btrfs_block_rsv delayed_block_rsv;
837 struct btrfs_block_rsv empty_block_rsv;
840 u64 last_trans_committed;
841 u64 avg_delayed_ref_runtime;
844 * this is updated to the current trans every time a full commit
845 * is required instead of the faster short fsync log commits
847 u64 last_trans_log_full_commit;
848 unsigned long mount_opt;
850 * Track requests for actions that need to be done during transaction
851 * commit (like for some mount options).
853 unsigned long pending_changes;
854 unsigned long compress_type:4;
855 unsigned int compress_level;
858 * It is a suggestive number, the read side is safe even it gets a
859 * wrong number because we will write out the data into a regular
860 * extent. The write side(mount/remount) is under ->s_umount lock,
861 * so it is also safe.
865 struct btrfs_transaction *running_transaction;
866 wait_queue_head_t transaction_throttle;
867 wait_queue_head_t transaction_wait;
868 wait_queue_head_t transaction_blocked_wait;
869 wait_queue_head_t async_submit_wait;
872 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
873 * when they are updated.
875 * Because we do not clear the flags for ever, so we needn't use
876 * the lock on the read side.
878 * We also needn't use the lock when we mount the fs, because
879 * there is no other task which will update the flag.
881 spinlock_t super_lock;
882 struct btrfs_super_block *super_copy;
883 struct btrfs_super_block *super_for_commit;
884 struct super_block *sb;
885 struct inode *btree_inode;
886 struct mutex tree_log_mutex;
887 struct mutex transaction_kthread_mutex;
888 struct mutex cleaner_mutex;
889 struct mutex chunk_mutex;
892 * this is taken to make sure we don't set block groups ro after
893 * the free space cache has been allocated on them
895 struct mutex ro_block_group_mutex;
897 /* this is used during read/modify/write to make sure
898 * no two ios are trying to mod the same stripe at the same
901 struct btrfs_stripe_hash_table *stripe_hash_table;
904 * this protects the ordered operations list only while we are
905 * processing all of the entries on it. This way we make
906 * sure the commit code doesn't find the list temporarily empty
907 * because another function happens to be doing non-waiting preflush
908 * before jumping into the main commit.
910 struct mutex ordered_operations_mutex;
912 struct rw_semaphore commit_root_sem;
914 struct rw_semaphore cleanup_work_sem;
916 struct rw_semaphore subvol_sem;
917 struct srcu_struct subvol_srcu;
919 spinlock_t trans_lock;
921 * the reloc mutex goes with the trans lock, it is taken
922 * during commit to protect us from the relocation code
924 struct mutex reloc_mutex;
926 struct list_head trans_list;
927 struct list_head dead_roots;
928 struct list_head caching_block_groups;
930 spinlock_t delayed_iput_lock;
931 struct list_head delayed_iputs;
932 struct mutex cleaner_delayed_iput_mutex;
934 /* this protects tree_mod_seq_list */
935 spinlock_t tree_mod_seq_lock;
936 atomic64_t tree_mod_seq;
937 struct list_head tree_mod_seq_list;
939 /* this protects tree_mod_log */
940 rwlock_t tree_mod_log_lock;
941 struct rb_root tree_mod_log;
943 atomic_t async_delalloc_pages;
946 * this is used to protect the following list -- ordered_roots.
948 spinlock_t ordered_root_lock;
951 * all fs/file tree roots in which there are data=ordered extents
952 * pending writeback are added into this list.
954 * these can span multiple transactions and basically include
955 * every dirty data page that isn't from nodatacow
957 struct list_head ordered_roots;
959 struct mutex delalloc_root_mutex;
960 spinlock_t delalloc_root_lock;
961 /* all fs/file tree roots that have delalloc inodes. */
962 struct list_head delalloc_roots;
965 * there is a pool of worker threads for checksumming during writes
966 * and a pool for checksumming after reads. This is because readers
967 * can run with FS locks held, and the writers may be waiting for
968 * those locks. We don't want ordering in the pending list to cause
969 * deadlocks, and so the two are serviced separately.
971 * A third pool does submit_bio to avoid deadlocking with the other
974 struct btrfs_workqueue *workers;
975 struct btrfs_workqueue *delalloc_workers;
976 struct btrfs_workqueue *flush_workers;
977 struct btrfs_workqueue *endio_workers;
978 struct btrfs_workqueue *endio_meta_workers;
979 struct btrfs_workqueue *endio_raid56_workers;
980 struct btrfs_workqueue *endio_repair_workers;
981 struct btrfs_workqueue *rmw_workers;
982 struct btrfs_workqueue *endio_meta_write_workers;
983 struct btrfs_workqueue *endio_write_workers;
984 struct btrfs_workqueue *endio_freespace_worker;
985 struct btrfs_workqueue *submit_workers;
986 struct btrfs_workqueue *caching_workers;
987 struct btrfs_workqueue *readahead_workers;
990 * fixup workers take dirty pages that didn't properly go through
991 * the cow mechanism and make them safe to write. It happens
992 * for the sys_munmap function call path
994 struct btrfs_workqueue *fixup_workers;
995 struct btrfs_workqueue *delayed_workers;
997 /* the extent workers do delayed refs on the extent allocation tree */
998 struct btrfs_workqueue *extent_workers;
999 struct task_struct *transaction_kthread;
1000 struct task_struct *cleaner_kthread;
1001 u32 thread_pool_size;
1003 struct kobject *space_info_kobj;
1004 struct list_head pending_raid_kobjs;
1005 spinlock_t pending_raid_kobjs_lock; /* uncontended */
1009 /* used to keep from writing metadata until there is a nice batch */
1010 struct percpu_counter dirty_metadata_bytes;
1011 struct percpu_counter delalloc_bytes;
1012 s32 dirty_metadata_batch;
1015 struct list_head dirty_cowonly_roots;
1017 struct btrfs_fs_devices *fs_devices;
1020 * The space_info list is effectively read only after initial
1021 * setup. It is populated at mount time and cleaned up after
1022 * all block groups are removed. RCU is used to protect it.
1024 struct list_head space_info;
1026 struct btrfs_space_info *data_sinfo;
1028 struct reloc_control *reloc_ctl;
1030 /* data_alloc_cluster is only used in ssd_spread mode */
1031 struct btrfs_free_cluster data_alloc_cluster;
1033 /* all metadata allocations go through this cluster */
1034 struct btrfs_free_cluster meta_alloc_cluster;
1036 /* auto defrag inodes go here */
1037 spinlock_t defrag_inodes_lock;
1038 struct rb_root defrag_inodes;
1039 atomic_t defrag_running;
1041 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1042 seqlock_t profiles_lock;
1044 * these three are in extended format (availability of single
1045 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1046 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1048 u64 avail_data_alloc_bits;
1049 u64 avail_metadata_alloc_bits;
1050 u64 avail_system_alloc_bits;
1052 /* restriper state */
1053 spinlock_t balance_lock;
1054 struct mutex balance_mutex;
1055 atomic_t balance_pause_req;
1056 atomic_t balance_cancel_req;
1057 struct btrfs_balance_control *balance_ctl;
1058 wait_queue_head_t balance_wait_q;
1060 u32 data_chunk_allocations;
1065 /* private scrub information */
1066 struct mutex scrub_lock;
1067 atomic_t scrubs_running;
1068 atomic_t scrub_pause_req;
1069 atomic_t scrubs_paused;
1070 atomic_t scrub_cancel_req;
1071 wait_queue_head_t scrub_pause_wait;
1072 int scrub_workers_refcnt;
1073 struct btrfs_workqueue *scrub_workers;
1074 struct btrfs_workqueue *scrub_wr_completion_workers;
1075 struct btrfs_workqueue *scrub_nocow_workers;
1076 struct btrfs_workqueue *scrub_parity_workers;
1078 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1079 u32 check_integrity_print_mask;
1081 /* is qgroup tracking in a consistent state? */
1084 /* holds configuration and tracking. Protected by qgroup_lock */
1085 struct rb_root qgroup_tree;
1086 struct rb_root qgroup_op_tree;
1087 spinlock_t qgroup_lock;
1088 spinlock_t qgroup_op_lock;
1089 atomic_t qgroup_op_seq;
1092 * used to avoid frequently calling ulist_alloc()/ulist_free()
1093 * when doing qgroup accounting, it must be protected by qgroup_lock.
1095 struct ulist *qgroup_ulist;
1097 /* protect user change for quota operations */
1098 struct mutex qgroup_ioctl_lock;
1100 /* list of dirty qgroups to be written at next commit */
1101 struct list_head dirty_qgroups;
1103 /* used by qgroup for an efficient tree traversal */
1106 /* qgroup rescan items */
1107 struct mutex qgroup_rescan_lock; /* protects the progress item */
1108 struct btrfs_key qgroup_rescan_progress;
1109 struct btrfs_workqueue *qgroup_rescan_workers;
1110 struct completion qgroup_rescan_completion;
1111 struct btrfs_work qgroup_rescan_work;
1112 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1114 /* filesystem state */
1115 unsigned long fs_state;
1117 struct btrfs_delayed_root *delayed_root;
1119 /* readahead tree */
1120 spinlock_t reada_lock;
1121 struct radix_tree_root reada_tree;
1123 /* readahead works cnt */
1124 atomic_t reada_works_cnt;
1126 /* Extent buffer radix tree */
1127 spinlock_t buffer_lock;
1128 struct radix_tree_root buffer_radix;
1130 /* next backup root to be overwritten */
1131 int backup_root_index;
1133 /* device replace state */
1134 struct btrfs_dev_replace dev_replace;
1136 struct semaphore uuid_tree_rescan_sem;
1138 /* Used to reclaim the metadata space in the background. */
1139 struct work_struct async_reclaim_work;
1141 spinlock_t unused_bgs_lock;
1142 struct list_head unused_bgs;
1143 struct mutex unused_bg_unpin_mutex;
1144 struct mutex delete_unused_bgs_mutex;
1146 /* For btrfs to record security options */
1147 struct security_mnt_opts security_opts;
1150 * Chunks that can't be freed yet (under a trim/discard operation)
1151 * and will be latter freed. Protected by fs_info->chunk_mutex.
1153 struct list_head pinned_chunks;
1155 /* Cached block sizes */
1160 /* Block groups and devices containing active swapfiles. */
1161 spinlock_t swapfile_pins_lock;
1162 struct rb_root swapfile_pins;
1164 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1165 spinlock_t ref_verify_lock;
1166 struct rb_root block_tree;
1170 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1172 return sb->s_fs_info;
1175 struct btrfs_subvolume_writers {
1176 struct percpu_counter counter;
1177 wait_queue_head_t wait;
1181 * The state of btrfs root
1185 * btrfs_record_root_in_trans is a multi-step process, and it can race
1186 * with the balancing code. But the race is very small, and only the
1187 * first time the root is added to each transaction. So IN_TRANS_SETUP
1188 * is used to tell us when more checks are required
1190 BTRFS_ROOT_IN_TRANS_SETUP,
1191 BTRFS_ROOT_REF_COWS,
1192 BTRFS_ROOT_TRACK_DIRTY,
1193 BTRFS_ROOT_IN_RADIX,
1194 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1195 BTRFS_ROOT_DEFRAG_RUNNING,
1196 BTRFS_ROOT_FORCE_COW,
1197 BTRFS_ROOT_MULTI_LOG_TASKS,
1202 * in ram representation of the tree. extent_root is used for all allocations
1203 * and for the extent tree extent_root root.
1206 struct extent_buffer *node;
1208 struct extent_buffer *commit_root;
1209 struct btrfs_root *log_root;
1210 struct btrfs_root *reloc_root;
1212 unsigned long state;
1213 struct btrfs_root_item root_item;
1214 struct btrfs_key root_key;
1215 struct btrfs_fs_info *fs_info;
1216 struct extent_io_tree dirty_log_pages;
1218 struct mutex objectid_mutex;
1220 spinlock_t accounting_lock;
1221 struct btrfs_block_rsv *block_rsv;
1223 /* free ino cache stuff */
1224 struct btrfs_free_space_ctl *free_ino_ctl;
1225 enum btrfs_caching_type ino_cache_state;
1226 spinlock_t ino_cache_lock;
1227 wait_queue_head_t ino_cache_wait;
1228 struct btrfs_free_space_ctl *free_ino_pinned;
1229 u64 ino_cache_progress;
1230 struct inode *ino_cache_inode;
1232 struct mutex log_mutex;
1233 wait_queue_head_t log_writer_wait;
1234 wait_queue_head_t log_commit_wait[2];
1235 struct list_head log_ctxs[2];
1236 atomic_t log_writers;
1237 atomic_t log_commit[2];
1240 /* No matter the commit succeeds or not*/
1241 int log_transid_committed;
1242 /* Just be updated when the commit succeeds. */
1243 int last_log_commit;
1244 pid_t log_start_pid;
1250 u64 highest_objectid;
1252 u64 defrag_trans_start;
1253 struct btrfs_key defrag_progress;
1254 struct btrfs_key defrag_max;
1256 /* the dirty list is only used by non-reference counted roots */
1257 struct list_head dirty_list;
1259 struct list_head root_list;
1261 spinlock_t log_extents_lock[2];
1262 struct list_head logged_list[2];
1264 int orphan_cleanup_state;
1266 spinlock_t inode_lock;
1267 /* red-black tree that keeps track of in-memory inodes */
1268 struct rb_root inode_tree;
1271 * radix tree that keeps track of delayed nodes of every inode,
1272 * protected by inode_lock
1274 struct radix_tree_root delayed_nodes_tree;
1276 * right now this just gets used so that a root has its own devid
1277 * for stat. It may be used for more later
1281 spinlock_t root_item_lock;
1284 struct mutex delalloc_mutex;
1285 spinlock_t delalloc_lock;
1287 * all of the inodes that have delalloc bytes. It is possible for
1288 * this list to be empty even when there is still dirty data=ordered
1289 * extents waiting to finish IO.
1291 struct list_head delalloc_inodes;
1292 struct list_head delalloc_root;
1293 u64 nr_delalloc_inodes;
1295 struct mutex ordered_extent_mutex;
1297 * this is used by the balancing code to wait for all the pending
1300 spinlock_t ordered_extent_lock;
1303 * all of the data=ordered extents pending writeback
1304 * these can span multiple transactions and basically include
1305 * every dirty data page that isn't from nodatacow
1307 struct list_head ordered_extents;
1308 struct list_head ordered_root;
1309 u64 nr_ordered_extents;
1312 * Number of currently running SEND ioctls to prevent
1313 * manipulation with the read-only status via SUBVOL_SETFLAGS
1315 int send_in_progress;
1316 struct btrfs_subvolume_writers *subv_writers;
1317 atomic_t will_be_snapshotted;
1318 atomic_t snapshot_force_cow;
1320 /* For qgroup metadata reserved space */
1321 spinlock_t qgroup_meta_rsv_lock;
1322 u64 qgroup_meta_rsv_pertrans;
1323 u64 qgroup_meta_rsv_prealloc;
1325 /* Number of active swapfiles */
1326 atomic_t nr_swapfiles;
1328 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1333 struct btrfs_file_private {
1337 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1339 return btrfs_sb(inode->i_sb)->sectorsize;
1342 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1345 return info->nodesize - sizeof(struct btrfs_header);
1348 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1350 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1352 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1355 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1357 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1360 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1361 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1362 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1364 return BTRFS_MAX_ITEM_SIZE(info) -
1365 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1368 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1370 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1374 * Flags for mount options.
1376 * Note: don't forget to add new options to btrfs_show_options()
1378 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1379 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1380 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1381 #define BTRFS_MOUNT_SSD (1 << 3)
1382 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1383 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1384 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1385 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1386 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1387 #define BTRFS_MOUNT_NOSSD (1 << 9)
1388 #define BTRFS_MOUNT_DISCARD (1 << 10)
1389 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1390 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1391 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1392 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1393 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1394 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1395 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1396 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1397 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1398 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1399 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1400 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1401 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1402 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1403 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1404 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1405 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1406 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1408 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1409 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1411 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1412 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1413 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1414 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1417 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1419 if (!btrfs_test_opt(fs_info, opt)) \
1420 btrfs_info(fs_info, fmt, ##args); \
1421 btrfs_set_opt(fs_info->mount_opt, opt); \
1424 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1426 if (btrfs_test_opt(fs_info, opt)) \
1427 btrfs_info(fs_info, fmt, ##args); \
1428 btrfs_clear_opt(fs_info->mount_opt, opt); \
1431 #ifdef CONFIG_BTRFS_DEBUG
1433 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1435 struct btrfs_fs_info *fs_info = block_group->fs_info;
1437 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1438 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1439 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1440 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1445 * Requests for changes that need to be done during transaction commit.
1447 * Internal mount options that are used for special handling of the real
1448 * mount options (eg. cannot be set during remount and have to be set during
1449 * transaction commit)
1452 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1453 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1454 #define BTRFS_PENDING_COMMIT (2)
1456 #define btrfs_test_pending(info, opt) \
1457 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1458 #define btrfs_set_pending(info, opt) \
1459 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1460 #define btrfs_clear_pending(info, opt) \
1461 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1464 * Helpers for setting pending mount option changes.
1466 * Expects corresponding macros
1467 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1469 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1471 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1472 btrfs_info((info), fmt, ##args); \
1473 btrfs_set_pending((info), SET_##opt); \
1474 btrfs_clear_pending((info), CLEAR_##opt); \
1478 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1480 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1481 btrfs_info((info), fmt, ##args); \
1482 btrfs_set_pending((info), CLEAR_##opt); \
1483 btrfs_clear_pending((info), SET_##opt); \
1490 #define BTRFS_INODE_NODATASUM (1 << 0)
1491 #define BTRFS_INODE_NODATACOW (1 << 1)
1492 #define BTRFS_INODE_READONLY (1 << 2)
1493 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1494 #define BTRFS_INODE_PREALLOC (1 << 4)
1495 #define BTRFS_INODE_SYNC (1 << 5)
1496 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1497 #define BTRFS_INODE_APPEND (1 << 7)
1498 #define BTRFS_INODE_NODUMP (1 << 8)
1499 #define BTRFS_INODE_NOATIME (1 << 9)
1500 #define BTRFS_INODE_DIRSYNC (1 << 10)
1501 #define BTRFS_INODE_COMPRESS (1 << 11)
1503 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1505 struct btrfs_map_token {
1506 const struct extent_buffer *eb;
1508 unsigned long offset;
1511 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1512 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1514 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1516 token->kaddr = NULL;
1519 /* some macros to generate set/get functions for the struct fields. This
1520 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1523 #define le8_to_cpu(v) (v)
1524 #define cpu_to_le8(v) (v)
1527 #define read_eb_member(eb, ptr, type, member, result) (\
1528 read_extent_buffer(eb, (char *)(result), \
1529 ((unsigned long)(ptr)) + \
1530 offsetof(type, member), \
1531 sizeof(((type *)0)->member)))
1533 #define write_eb_member(eb, ptr, type, member, result) (\
1534 write_extent_buffer(eb, (char *)(result), \
1535 ((unsigned long)(ptr)) + \
1536 offsetof(type, member), \
1537 sizeof(((type *)0)->member)))
1539 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1540 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1541 const void *ptr, unsigned long off, \
1542 struct btrfs_map_token *token); \
1543 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1544 unsigned long off, u##bits val, \
1545 struct btrfs_map_token *token); \
1546 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1548 unsigned long off) \
1550 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1552 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1553 unsigned long off, u##bits val) \
1555 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1558 DECLARE_BTRFS_SETGET_BITS(8)
1559 DECLARE_BTRFS_SETGET_BITS(16)
1560 DECLARE_BTRFS_SETGET_BITS(32)
1561 DECLARE_BTRFS_SETGET_BITS(64)
1563 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1564 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1567 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1568 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1570 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1573 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1574 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1576 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1578 struct btrfs_map_token *token) \
1580 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1581 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1583 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1584 type *s, u##bits val, \
1585 struct btrfs_map_token *token) \
1587 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1588 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1591 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1592 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1594 const type *p = page_address(eb->pages[0]); \
1595 u##bits res = le##bits##_to_cpu(p->member); \
1598 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1601 type *p = page_address(eb->pages[0]); \
1602 p->member = cpu_to_le##bits(val); \
1605 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1606 static inline u##bits btrfs_##name(const type *s) \
1608 return le##bits##_to_cpu(s->member); \
1610 static inline void btrfs_set_##name(type *s, u##bits val) \
1612 s->member = cpu_to_le##bits(val); \
1616 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1617 struct btrfs_dev_item *s)
1619 BUILD_BUG_ON(sizeof(u64) !=
1620 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1621 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1624 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1625 struct btrfs_dev_item *s,
1628 BUILD_BUG_ON(sizeof(u64) !=
1629 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1630 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1631 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1635 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1636 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1637 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1638 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1639 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1641 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1642 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1643 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1644 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1645 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1646 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1648 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1649 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1651 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1653 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1655 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1657 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1659 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1660 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1662 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1664 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1666 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1669 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1671 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1674 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1676 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1679 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1680 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1681 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1682 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1683 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1684 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1685 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1686 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1687 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1688 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1689 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1691 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1693 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1696 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1697 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1698 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1700 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1702 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1704 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1706 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1707 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1709 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1711 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1712 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1714 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1717 unsigned long offset = (unsigned long)c;
1718 offset += offsetof(struct btrfs_chunk, stripe);
1719 offset += nr * sizeof(struct btrfs_stripe);
1720 return (struct btrfs_stripe *)offset;
1723 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1725 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1728 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1729 struct btrfs_chunk *c, int nr)
1731 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1734 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1735 struct btrfs_chunk *c, int nr)
1737 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1740 /* struct btrfs_block_group_item */
1741 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1743 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1745 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1746 struct btrfs_block_group_item, chunk_objectid, 64);
1748 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1749 struct btrfs_block_group_item, chunk_objectid, 64);
1750 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1751 struct btrfs_block_group_item, flags, 64);
1752 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1753 struct btrfs_block_group_item, flags, 64);
1755 /* struct btrfs_free_space_info */
1756 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1758 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1760 /* struct btrfs_inode_ref */
1761 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1762 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1764 /* struct btrfs_inode_extref */
1765 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1766 parent_objectid, 64);
1767 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1769 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1771 /* struct btrfs_inode_item */
1772 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1773 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1774 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1775 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1776 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1777 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1778 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1779 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1780 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1781 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1782 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1783 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1784 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1786 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1788 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1790 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1791 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1793 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1795 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1796 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1797 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1798 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1799 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1800 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1801 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1802 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1803 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1804 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1806 /* struct btrfs_dev_extent */
1807 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1809 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1810 chunk_objectid, 64);
1811 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1813 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1815 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1817 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1818 return (unsigned long)dev + ptr;
1821 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1822 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1824 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1826 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1829 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1831 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1832 struct btrfs_tree_block_info *item,
1833 struct btrfs_disk_key *key)
1835 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1838 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1839 struct btrfs_tree_block_info *item,
1840 struct btrfs_disk_key *key)
1842 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1845 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1847 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1849 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1851 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1854 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1857 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1859 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1862 static inline u32 btrfs_extent_inline_ref_size(int type)
1864 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1865 type == BTRFS_SHARED_BLOCK_REF_KEY)
1866 return sizeof(struct btrfs_extent_inline_ref);
1867 if (type == BTRFS_SHARED_DATA_REF_KEY)
1868 return sizeof(struct btrfs_shared_data_ref) +
1869 sizeof(struct btrfs_extent_inline_ref);
1870 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1871 return sizeof(struct btrfs_extent_data_ref) +
1872 offsetof(struct btrfs_extent_inline_ref, offset);
1876 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1877 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1879 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1880 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1882 /* struct btrfs_node */
1883 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1884 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1885 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1887 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1890 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1893 ptr = offsetof(struct btrfs_node, ptrs) +
1894 sizeof(struct btrfs_key_ptr) * nr;
1895 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1898 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1902 ptr = offsetof(struct btrfs_node, ptrs) +
1903 sizeof(struct btrfs_key_ptr) * nr;
1904 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1907 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1910 ptr = offsetof(struct btrfs_node, ptrs) +
1911 sizeof(struct btrfs_key_ptr) * nr;
1912 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1915 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1919 ptr = offsetof(struct btrfs_node, ptrs) +
1920 sizeof(struct btrfs_key_ptr) * nr;
1921 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1924 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1926 return offsetof(struct btrfs_node, ptrs) +
1927 sizeof(struct btrfs_key_ptr) * nr;
1930 void btrfs_node_key(const struct extent_buffer *eb,
1931 struct btrfs_disk_key *disk_key, int nr);
1933 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1934 struct btrfs_disk_key *disk_key, int nr)
1937 ptr = btrfs_node_key_ptr_offset(nr);
1938 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1939 struct btrfs_key_ptr, key, disk_key);
1942 /* struct btrfs_item */
1943 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1944 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1945 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1946 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1948 static inline unsigned long btrfs_item_nr_offset(int nr)
1950 return offsetof(struct btrfs_leaf, items) +
1951 sizeof(struct btrfs_item) * nr;
1954 static inline struct btrfs_item *btrfs_item_nr(int nr)
1956 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1959 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1960 struct btrfs_item *item)
1962 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1965 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1967 return btrfs_item_end(eb, btrfs_item_nr(nr));
1970 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1972 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1975 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1977 return btrfs_item_size(eb, btrfs_item_nr(nr));
1980 static inline void btrfs_item_key(const struct extent_buffer *eb,
1981 struct btrfs_disk_key *disk_key, int nr)
1983 struct btrfs_item *item = btrfs_item_nr(nr);
1984 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1987 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1988 struct btrfs_disk_key *disk_key, int nr)
1990 struct btrfs_item *item = btrfs_item_nr(nr);
1991 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1994 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1997 * struct btrfs_root_ref
1999 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2000 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2001 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2003 /* struct btrfs_dir_item */
2004 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2005 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2006 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2007 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2008 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2009 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2011 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2013 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2016 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
2017 const struct btrfs_dir_item *item,
2018 struct btrfs_disk_key *key)
2020 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2023 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2024 struct btrfs_dir_item *item,
2025 const struct btrfs_disk_key *key)
2027 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2030 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2032 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2034 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2037 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2038 const struct btrfs_free_space_header *h,
2039 struct btrfs_disk_key *key)
2041 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2044 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2045 struct btrfs_free_space_header *h,
2046 const struct btrfs_disk_key *key)
2048 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2051 /* struct btrfs_disk_key */
2052 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2054 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2055 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2057 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2058 const struct btrfs_disk_key *disk)
2060 cpu->offset = le64_to_cpu(disk->offset);
2061 cpu->type = disk->type;
2062 cpu->objectid = le64_to_cpu(disk->objectid);
2065 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2066 const struct btrfs_key *cpu)
2068 disk->offset = cpu_to_le64(cpu->offset);
2069 disk->type = cpu->type;
2070 disk->objectid = cpu_to_le64(cpu->objectid);
2073 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2074 struct btrfs_key *key, int nr)
2076 struct btrfs_disk_key disk_key;
2077 btrfs_node_key(eb, &disk_key, nr);
2078 btrfs_disk_key_to_cpu(key, &disk_key);
2081 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2082 struct btrfs_key *key, int nr)
2084 struct btrfs_disk_key disk_key;
2085 btrfs_item_key(eb, &disk_key, nr);
2086 btrfs_disk_key_to_cpu(key, &disk_key);
2089 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2090 const struct btrfs_dir_item *item,
2091 struct btrfs_key *key)
2093 struct btrfs_disk_key disk_key;
2094 btrfs_dir_item_key(eb, item, &disk_key);
2095 btrfs_disk_key_to_cpu(key, &disk_key);
2098 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2103 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2108 /* struct btrfs_header */
2109 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2110 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2112 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2113 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2114 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2115 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2116 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2118 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2119 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2121 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2123 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2125 return (btrfs_header_flags(eb) & flag) == flag;
2128 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2130 u64 flags = btrfs_header_flags(eb);
2131 btrfs_set_header_flags(eb, flags | flag);
2132 return (flags & flag) == flag;
2135 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2137 u64 flags = btrfs_header_flags(eb);
2138 btrfs_set_header_flags(eb, flags & ~flag);
2139 return (flags & flag) == flag;
2142 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2144 u64 flags = btrfs_header_flags(eb);
2145 return flags >> BTRFS_BACKREF_REV_SHIFT;
2148 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2151 u64 flags = btrfs_header_flags(eb);
2152 flags &= ~BTRFS_BACKREF_REV_MASK;
2153 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2154 btrfs_set_header_flags(eb, flags);
2157 static inline unsigned long btrfs_header_fsid(void)
2159 return offsetof(struct btrfs_header, fsid);
2162 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2164 return offsetof(struct btrfs_header, chunk_tree_uuid);
2167 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2169 return btrfs_header_level(eb) == 0;
2172 /* struct btrfs_root_item */
2173 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2175 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2176 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2177 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2179 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2181 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2182 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2183 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2184 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2185 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2186 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2187 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2188 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2190 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2192 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2194 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2196 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2198 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2201 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2203 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2206 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2208 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2211 /* struct btrfs_root_backup */
2212 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2214 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2216 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2217 tree_root_level, 8);
2219 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2221 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2222 chunk_root_gen, 64);
2223 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2224 chunk_root_level, 8);
2226 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2228 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2229 extent_root_gen, 64);
2230 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2231 extent_root_level, 8);
2233 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2235 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2237 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2240 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2242 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2244 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2247 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2249 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2251 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2252 csum_root_level, 8);
2253 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2255 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2257 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2260 /* struct btrfs_balance_item */
2261 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2263 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2264 const struct btrfs_balance_item *bi,
2265 struct btrfs_disk_balance_args *ba)
2267 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2270 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2271 struct btrfs_balance_item *bi,
2272 const struct btrfs_disk_balance_args *ba)
2274 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2277 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2278 const struct btrfs_balance_item *bi,
2279 struct btrfs_disk_balance_args *ba)
2281 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2284 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2285 struct btrfs_balance_item *bi,
2286 const struct btrfs_disk_balance_args *ba)
2288 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2291 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2292 const struct btrfs_balance_item *bi,
2293 struct btrfs_disk_balance_args *ba)
2295 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2298 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2299 struct btrfs_balance_item *bi,
2300 const struct btrfs_disk_balance_args *ba)
2302 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2306 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2307 const struct btrfs_disk_balance_args *disk)
2309 memset(cpu, 0, sizeof(*cpu));
2311 cpu->profiles = le64_to_cpu(disk->profiles);
2312 cpu->usage = le64_to_cpu(disk->usage);
2313 cpu->devid = le64_to_cpu(disk->devid);
2314 cpu->pstart = le64_to_cpu(disk->pstart);
2315 cpu->pend = le64_to_cpu(disk->pend);
2316 cpu->vstart = le64_to_cpu(disk->vstart);
2317 cpu->vend = le64_to_cpu(disk->vend);
2318 cpu->target = le64_to_cpu(disk->target);
2319 cpu->flags = le64_to_cpu(disk->flags);
2320 cpu->limit = le64_to_cpu(disk->limit);
2321 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2322 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2326 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2327 const struct btrfs_balance_args *cpu)
2329 memset(disk, 0, sizeof(*disk));
2331 disk->profiles = cpu_to_le64(cpu->profiles);
2332 disk->usage = cpu_to_le64(cpu->usage);
2333 disk->devid = cpu_to_le64(cpu->devid);
2334 disk->pstart = cpu_to_le64(cpu->pstart);
2335 disk->pend = cpu_to_le64(cpu->pend);
2336 disk->vstart = cpu_to_le64(cpu->vstart);
2337 disk->vend = cpu_to_le64(cpu->vend);
2338 disk->target = cpu_to_le64(cpu->target);
2339 disk->flags = cpu_to_le64(cpu->flags);
2340 disk->limit = cpu_to_le64(cpu->limit);
2341 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2342 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2345 /* struct btrfs_super_block */
2346 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2347 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2348 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2350 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2351 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2352 struct btrfs_super_block, sys_chunk_array_size, 32);
2353 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2354 struct btrfs_super_block, chunk_root_generation, 64);
2355 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2357 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2359 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2360 chunk_root_level, 8);
2361 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2363 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2364 log_root_transid, 64);
2365 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2367 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2369 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2371 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2373 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2375 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2377 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2378 root_dir_objectid, 64);
2379 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2381 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2383 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2384 compat_ro_flags, 64);
2385 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2386 incompat_flags, 64);
2387 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2389 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2390 cache_generation, 64);
2391 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2392 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2393 uuid_tree_generation, 64);
2395 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2397 u16 t = btrfs_super_csum_type(s);
2399 * csum type is validated at mount time
2401 return btrfs_csum_sizes[t];
2406 * The leaf data grows from end-to-front in the node.
2407 * this returns the address of the start of the last item,
2408 * which is the stop of the leaf data stack
2410 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2411 const struct extent_buffer *leaf)
2413 u32 nr = btrfs_header_nritems(leaf);
2416 return BTRFS_LEAF_DATA_SIZE(fs_info);
2417 return btrfs_item_offset_nr(leaf, nr - 1);
2420 /* struct btrfs_file_extent_item */
2421 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2422 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2423 struct btrfs_file_extent_item, disk_bytenr, 64);
2424 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2425 struct btrfs_file_extent_item, offset, 64);
2426 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2427 struct btrfs_file_extent_item, generation, 64);
2428 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2429 struct btrfs_file_extent_item, num_bytes, 64);
2430 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2431 struct btrfs_file_extent_item, disk_num_bytes, 64);
2432 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2433 struct btrfs_file_extent_item, compression, 8);
2435 static inline unsigned long
2436 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2438 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2441 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2443 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2446 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2448 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2450 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2451 disk_num_bytes, 64);
2452 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2454 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2456 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2458 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2460 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2462 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2463 other_encoding, 16);
2466 * this returns the number of bytes used by the item on disk, minus the
2467 * size of any extent headers. If a file is compressed on disk, this is
2468 * the compressed size
2470 static inline u32 btrfs_file_extent_inline_item_len(
2471 const struct extent_buffer *eb,
2472 struct btrfs_item *e)
2474 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2477 /* btrfs_dev_stats_item */
2478 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2479 const struct btrfs_dev_stats_item *ptr,
2484 read_extent_buffer(eb, &val,
2485 offsetof(struct btrfs_dev_stats_item, values) +
2486 ((unsigned long)ptr) + (index * sizeof(u64)),
2491 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2492 struct btrfs_dev_stats_item *ptr,
2495 write_extent_buffer(eb, &val,
2496 offsetof(struct btrfs_dev_stats_item, values) +
2497 ((unsigned long)ptr) + (index * sizeof(u64)),
2501 /* btrfs_qgroup_status_item */
2502 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2504 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2506 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2508 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2511 /* btrfs_qgroup_info_item */
2512 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2514 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2515 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2517 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2518 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2521 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2522 struct btrfs_qgroup_info_item, generation, 64);
2523 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2525 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2526 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2527 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2529 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2530 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2532 /* btrfs_qgroup_limit_item */
2533 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2535 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2537 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2539 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2541 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2544 /* btrfs_dev_replace_item */
2545 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2546 struct btrfs_dev_replace_item, src_devid, 64);
2547 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2548 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2550 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2552 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2554 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2556 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2557 num_write_errors, 64);
2558 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2559 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2561 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2563 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2566 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2567 struct btrfs_dev_replace_item, src_devid, 64);
2568 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2569 struct btrfs_dev_replace_item,
2570 cont_reading_from_srcdev_mode, 64);
2571 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2572 struct btrfs_dev_replace_item, replace_state, 64);
2573 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2574 struct btrfs_dev_replace_item, time_started, 64);
2575 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2576 struct btrfs_dev_replace_item, time_stopped, 64);
2577 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2578 struct btrfs_dev_replace_item, num_write_errors, 64);
2579 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2580 struct btrfs_dev_replace_item,
2581 num_uncorrectable_read_errors, 64);
2582 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2583 struct btrfs_dev_replace_item, cursor_left, 64);
2584 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2585 struct btrfs_dev_replace_item, cursor_right, 64);
2587 /* helper function to cast into the data area of the leaf. */
2588 #define btrfs_item_ptr(leaf, slot, type) \
2589 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2590 btrfs_item_offset_nr(leaf, slot)))
2592 #define btrfs_item_ptr_offset(leaf, slot) \
2593 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2594 btrfs_item_offset_nr(leaf, slot)))
2596 static inline u64 btrfs_name_hash(const char *name, int len)
2598 return crc32c((u32)~1, name, len);
2602 * Figure the key offset of an extended inode ref
2604 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2607 return (u64) crc32c(parent_objectid, name, len);
2610 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2612 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2613 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2616 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2618 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2623 enum btrfs_inline_ref_type {
2624 BTRFS_REF_TYPE_INVALID = 0,
2625 BTRFS_REF_TYPE_BLOCK = 1,
2626 BTRFS_REF_TYPE_DATA = 2,
2627 BTRFS_REF_TYPE_ANY = 3,
2630 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2631 struct btrfs_extent_inline_ref *iref,
2632 enum btrfs_inline_ref_type is_data);
2634 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2636 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2639 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2643 * Doing a truncate won't result in new nodes or leaves, just what we need for
2646 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2649 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2652 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans);
2653 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans);
2654 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2656 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2657 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2658 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2659 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2660 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2661 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2662 unsigned long count);
2663 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2664 unsigned long count, u64 transid, int wait);
2665 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2666 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2667 struct btrfs_fs_info *fs_info, u64 bytenr,
2668 u64 offset, int metadata, u64 *refs, u64 *flags);
2669 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2670 u64 bytenr, u64 num, int reserved);
2671 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2672 u64 bytenr, u64 num_bytes);
2673 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2674 struct extent_buffer *eb);
2675 int btrfs_cross_ref_exist(struct btrfs_root *root,
2676 u64 objectid, u64 offset, u64 bytenr);
2677 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2678 struct btrfs_fs_info *info,
2680 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2681 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2682 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2683 struct btrfs_root *root,
2684 u64 parent, u64 root_objectid,
2685 const struct btrfs_disk_key *key,
2686 int level, u64 hint,
2688 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2689 struct btrfs_root *root,
2690 struct extent_buffer *buf,
2691 u64 parent, int last_ref);
2692 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2693 struct btrfs_root *root, u64 owner,
2694 u64 offset, u64 ram_bytes,
2695 struct btrfs_key *ins);
2696 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2697 u64 root_objectid, u64 owner, u64 offset,
2698 struct btrfs_key *ins);
2699 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2700 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2701 struct btrfs_key *ins, int is_data, int delalloc);
2702 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2703 struct extent_buffer *buf, int full_backref);
2704 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2705 struct extent_buffer *buf, int full_backref);
2706 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2707 struct btrfs_fs_info *fs_info,
2708 u64 bytenr, u64 num_bytes, u64 flags,
2709 int level, int is_data);
2710 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2711 struct btrfs_root *root,
2712 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2713 u64 owner, u64 offset);
2715 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2716 u64 start, u64 len, int delalloc);
2717 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2718 u64 start, u64 len);
2719 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2720 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2721 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2722 struct btrfs_root *root,
2723 u64 bytenr, u64 num_bytes, u64 parent,
2724 u64 root_objectid, u64 owner, u64 offset);
2726 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2727 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2728 struct btrfs_fs_info *fs_info);
2729 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2730 struct btrfs_fs_info *fs_info);
2731 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2732 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2733 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2734 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2735 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2736 u64 bytes_used, u64 type, u64 chunk_offset,
2738 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2739 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2740 struct btrfs_fs_info *fs_info,
2741 const u64 chunk_offset);
2742 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2743 u64 group_start, struct extent_map *em);
2744 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2745 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2746 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2747 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2748 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2749 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2750 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2751 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2753 enum btrfs_reserve_flush_enum {
2754 /* If we are in the transaction, we can't flush anything.*/
2755 BTRFS_RESERVE_NO_FLUSH,
2757 * Flushing delalloc may cause deadlock somewhere, in this
2758 * case, use FLUSH LIMIT
2760 BTRFS_RESERVE_FLUSH_LIMIT,
2761 BTRFS_RESERVE_FLUSH_ALL,
2764 enum btrfs_flush_state {
2765 FLUSH_DELAYED_ITEMS_NR = 1,
2766 FLUSH_DELAYED_ITEMS = 2,
2768 FLUSH_DELALLOC_WAIT = 4,
2773 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2774 int btrfs_check_data_free_space(struct inode *inode,
2775 struct extent_changeset **reserved, u64 start, u64 len);
2776 void btrfs_free_reserved_data_space(struct inode *inode,
2777 struct extent_changeset *reserved, u64 start, u64 len);
2778 void btrfs_delalloc_release_space(struct inode *inode,
2779 struct extent_changeset *reserved,
2780 u64 start, u64 len, bool qgroup_free);
2781 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2783 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2784 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2785 struct btrfs_block_rsv *rsv,
2786 int nitems, bool use_global_rsv);
2787 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2788 struct btrfs_block_rsv *rsv);
2789 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2792 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2793 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2795 int btrfs_delalloc_reserve_space(struct inode *inode,
2796 struct extent_changeset **reserved, u64 start, u64 len);
2797 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2798 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2799 unsigned short type);
2800 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2801 struct btrfs_block_rsv *rsv,
2802 unsigned short type);
2803 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2804 struct btrfs_block_rsv *rsv);
2805 int btrfs_block_rsv_add(struct btrfs_root *root,
2806 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2807 enum btrfs_reserve_flush_enum flush);
2808 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2809 int btrfs_block_rsv_refill(struct btrfs_root *root,
2810 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2811 enum btrfs_reserve_flush_enum flush);
2812 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2813 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2815 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2816 struct btrfs_block_rsv *dest, u64 num_bytes,
2818 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2819 struct btrfs_block_rsv *block_rsv,
2821 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2822 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2823 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2824 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2825 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2826 u64 start, u64 end);
2827 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2828 u64 num_bytes, u64 *actual_bytes);
2829 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2830 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2832 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2833 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2834 struct btrfs_fs_info *fs_info);
2835 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2836 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2837 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2838 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2839 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2840 u64 start, u64 end);
2841 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2844 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2845 int level, int *slot);
2846 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2847 int btrfs_previous_item(struct btrfs_root *root,
2848 struct btrfs_path *path, u64 min_objectid,
2850 int btrfs_previous_extent_item(struct btrfs_root *root,
2851 struct btrfs_path *path, u64 min_objectid);
2852 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2853 struct btrfs_path *path,
2854 const struct btrfs_key *new_key);
2855 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2856 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2857 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2858 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2859 struct btrfs_key *key, int lowest_level,
2861 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2862 struct btrfs_path *path,
2864 enum btrfs_compare_tree_result {
2865 BTRFS_COMPARE_TREE_NEW,
2866 BTRFS_COMPARE_TREE_DELETED,
2867 BTRFS_COMPARE_TREE_CHANGED,
2868 BTRFS_COMPARE_TREE_SAME,
2870 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2871 struct btrfs_path *right_path,
2872 struct btrfs_key *key,
2873 enum btrfs_compare_tree_result result,
2875 int btrfs_compare_trees(struct btrfs_root *left_root,
2876 struct btrfs_root *right_root,
2877 btrfs_changed_cb_t cb, void *ctx);
2878 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2879 struct btrfs_root *root, struct extent_buffer *buf,
2880 struct extent_buffer *parent, int parent_slot,
2881 struct extent_buffer **cow_ret);
2882 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2883 struct btrfs_root *root,
2884 struct extent_buffer *buf,
2885 struct extent_buffer **cow_ret, u64 new_root_objectid);
2886 int btrfs_block_can_be_shared(struct btrfs_root *root,
2887 struct extent_buffer *buf);
2888 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2890 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2891 struct btrfs_path *path, u32 new_size, int from_end);
2892 int btrfs_split_item(struct btrfs_trans_handle *trans,
2893 struct btrfs_root *root,
2894 struct btrfs_path *path,
2895 const struct btrfs_key *new_key,
2896 unsigned long split_offset);
2897 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2898 struct btrfs_root *root,
2899 struct btrfs_path *path,
2900 const struct btrfs_key *new_key);
2901 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2902 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2903 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2904 const struct btrfs_key *key, struct btrfs_path *p,
2905 int ins_len, int cow);
2906 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2907 struct btrfs_path *p, u64 time_seq);
2908 int btrfs_search_slot_for_read(struct btrfs_root *root,
2909 const struct btrfs_key *key,
2910 struct btrfs_path *p, int find_higher,
2912 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2913 struct btrfs_root *root, struct extent_buffer *parent,
2914 int start_slot, u64 *last_ret,
2915 struct btrfs_key *progress);
2916 void btrfs_release_path(struct btrfs_path *p);
2917 struct btrfs_path *btrfs_alloc_path(void);
2918 void btrfs_free_path(struct btrfs_path *p);
2919 void btrfs_set_path_blocking(struct btrfs_path *p);
2920 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2922 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2923 struct btrfs_path *path, int slot, int nr);
2924 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2925 struct btrfs_root *root,
2926 struct btrfs_path *path)
2928 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2931 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2932 const struct btrfs_key *cpu_key, u32 *data_size,
2933 u32 total_data, u32 total_size, int nr);
2934 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2935 const struct btrfs_key *key, void *data, u32 data_size);
2936 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2937 struct btrfs_root *root,
2938 struct btrfs_path *path,
2939 const struct btrfs_key *cpu_key, u32 *data_size,
2942 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2943 struct btrfs_root *root,
2944 struct btrfs_path *path,
2945 const struct btrfs_key *key,
2948 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2951 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2952 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2953 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2955 static inline int btrfs_next_old_item(struct btrfs_root *root,
2956 struct btrfs_path *p, u64 time_seq)
2959 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2960 return btrfs_next_old_leaf(root, p, time_seq);
2963 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2965 return btrfs_next_old_item(root, p, 0);
2967 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2968 struct extent_buffer *leaf);
2969 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2970 struct btrfs_block_rsv *block_rsv,
2971 int update_ref, int for_reloc);
2972 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2973 struct btrfs_root *root,
2974 struct extent_buffer *node,
2975 struct extent_buffer *parent);
2976 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2979 * Do it this way so we only ever do one test_bit in the normal case.
2981 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2982 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2990 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2991 * anything except sleeping. This function is used to check the status of
2994 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2996 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2999 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3001 kfree(fs_info->balance_ctl);
3002 kfree(fs_info->delayed_root);
3003 kfree(fs_info->extent_root);
3004 kfree(fs_info->tree_root);
3005 kfree(fs_info->chunk_root);
3006 kfree(fs_info->dev_root);
3007 kfree(fs_info->csum_root);
3008 kfree(fs_info->quota_root);
3009 kfree(fs_info->uuid_root);
3010 kfree(fs_info->free_space_root);
3011 kfree(fs_info->super_copy);
3012 kfree(fs_info->super_for_commit);
3013 security_free_mnt_opts(&fs_info->security_opts);
3017 /* tree mod log functions from ctree.c */
3018 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3019 struct seq_list *elem);
3020 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3021 struct seq_list *elem);
3022 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3025 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3026 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3028 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3029 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3031 int btrfs_del_root(struct btrfs_trans_handle *trans,
3032 const struct btrfs_key *key);
3033 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3034 const struct btrfs_key *key,
3035 struct btrfs_root_item *item);
3036 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3037 struct btrfs_root *root,
3038 struct btrfs_key *key,
3039 struct btrfs_root_item *item);
3040 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3041 struct btrfs_path *path, struct btrfs_root_item *root_item,
3042 struct btrfs_key *root_key);
3043 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3044 void btrfs_set_root_node(struct btrfs_root_item *item,
3045 struct extent_buffer *node);
3046 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3047 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3048 struct btrfs_root *root);
3051 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3053 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3055 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3056 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3060 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3061 const char *name, int name_len);
3062 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3063 int name_len, struct btrfs_inode *dir,
3064 struct btrfs_key *location, u8 type, u64 index);
3065 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root,
3067 struct btrfs_path *path, u64 dir,
3068 const char *name, int name_len,
3070 struct btrfs_dir_item *
3071 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3072 struct btrfs_root *root,
3073 struct btrfs_path *path, u64 dir,
3074 u64 objectid, const char *name, int name_len,
3076 struct btrfs_dir_item *
3077 btrfs_search_dir_index_item(struct btrfs_root *root,
3078 struct btrfs_path *path, u64 dirid,
3079 const char *name, int name_len);
3080 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3081 struct btrfs_root *root,
3082 struct btrfs_path *path,
3083 struct btrfs_dir_item *di);
3084 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3085 struct btrfs_root *root,
3086 struct btrfs_path *path, u64 objectid,
3087 const char *name, u16 name_len,
3088 const void *data, u16 data_len);
3089 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3090 struct btrfs_root *root,
3091 struct btrfs_path *path, u64 dir,
3092 const char *name, u16 name_len,
3094 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3095 struct btrfs_path *path,
3100 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3101 struct btrfs_root *root, u64 offset);
3102 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3103 struct btrfs_root *root, u64 offset);
3104 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3107 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3108 struct btrfs_root *root,
3109 const char *name, int name_len,
3110 u64 inode_objectid, u64 ref_objectid, u64 index);
3111 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3112 struct btrfs_root *root,
3113 const char *name, int name_len,
3114 u64 inode_objectid, u64 ref_objectid, u64 *index);
3115 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3116 struct btrfs_root *root,
3117 struct btrfs_path *path, u64 objectid);
3118 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3119 *root, struct btrfs_path *path,
3120 struct btrfs_key *location, int mod);
3122 struct btrfs_inode_extref *
3123 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3124 struct btrfs_root *root,
3125 struct btrfs_path *path,
3126 const char *name, int name_len,
3127 u64 inode_objectid, u64 ref_objectid, int ins_len,
3130 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3132 int name_len, struct btrfs_inode_ref **ref_ret);
3133 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3134 u64 ref_objectid, const char *name,
3136 struct btrfs_inode_extref **extref_ret);
3139 struct btrfs_dio_private;
3140 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3141 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3142 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3143 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3144 u64 logical_offset);
3145 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3146 struct btrfs_root *root,
3147 u64 objectid, u64 pos,
3148 u64 disk_offset, u64 disk_num_bytes,
3149 u64 num_bytes, u64 offset, u64 ram_bytes,
3150 u8 compression, u8 encryption, u16 other_encoding);
3151 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3152 struct btrfs_root *root,
3153 struct btrfs_path *path, u64 objectid,
3154 u64 bytenr, int mod);
3155 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3156 struct btrfs_root *root,
3157 struct btrfs_ordered_sum *sums);
3158 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3159 u64 file_start, int contig);
3160 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3161 struct list_head *list, int search_commit);
3162 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3163 const struct btrfs_path *path,
3164 struct btrfs_file_extent_item *fi,
3165 const bool new_inline,
3166 struct extent_map *em);
3169 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3170 struct page *page, size_t pg_offset, u64 start,
3171 u64 len, int create);
3172 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3173 u64 *orig_start, u64 *orig_block_len,
3176 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3177 struct btrfs_inode *inode);
3178 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3179 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3180 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3181 struct btrfs_root *root,
3182 struct btrfs_inode *dir, struct btrfs_inode *inode,
3183 const char *name, int name_len);
3184 int btrfs_add_link(struct btrfs_trans_handle *trans,
3185 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3186 const char *name, int name_len, int add_backref, u64 index);
3187 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3188 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3190 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3191 struct btrfs_root *root,
3192 struct inode *inode, u64 new_size,
3195 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3196 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3197 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3198 unsigned int extra_bits,
3199 struct extent_state **cached_state, int dedupe);
3200 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3201 struct btrfs_root *new_root,
3202 struct btrfs_root *parent_root,
3204 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3206 void btrfs_clear_delalloc_extent(struct inode *inode,
3207 struct extent_state *state, unsigned *bits);
3208 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3209 struct extent_state *other);
3210 void btrfs_split_delalloc_extent(struct inode *inode,
3211 struct extent_state *orig, u64 split);
3212 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3213 unsigned long bio_flags);
3214 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3215 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3216 int btrfs_readpage(struct file *file, struct page *page);
3217 void btrfs_evict_inode(struct inode *inode);
3218 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3219 struct inode *btrfs_alloc_inode(struct super_block *sb);
3220 void btrfs_destroy_inode(struct inode *inode);
3221 int btrfs_drop_inode(struct inode *inode);
3222 int __init btrfs_init_cachep(void);
3223 void __cold btrfs_destroy_cachep(void);
3224 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3225 struct btrfs_root *root, int *new,
3226 struct btrfs_path *path);
3227 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3228 struct btrfs_root *root, int *was_new);
3229 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3230 struct page *page, size_t pg_offset,
3231 u64 start, u64 end, int create);
3232 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3233 struct btrfs_root *root,
3234 struct inode *inode);
3235 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3236 struct btrfs_root *root, struct inode *inode);
3237 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3238 struct btrfs_inode *inode);
3239 int btrfs_orphan_cleanup(struct btrfs_root *root);
3240 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3241 void btrfs_add_delayed_iput(struct inode *inode);
3242 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3243 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3244 u64 start, u64 num_bytes, u64 min_size,
3245 loff_t actual_len, u64 *alloc_hint);
3246 int btrfs_prealloc_file_range_trans(struct inode *inode,
3247 struct btrfs_trans_handle *trans, int mode,
3248 u64 start, u64 num_bytes, u64 min_size,
3249 loff_t actual_len, u64 *alloc_hint);
3250 int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
3251 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3252 struct writeback_control *wbc);
3253 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3254 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3255 u64 end, int uptodate);
3256 extern const struct dentry_operations btrfs_dentry_operations;
3259 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3260 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3261 int btrfs_ioctl_get_supported_features(void __user *arg);
3262 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3263 int btrfs_is_empty_uuid(u8 *uuid);
3264 int btrfs_defrag_file(struct inode *inode, struct file *file,
3265 struct btrfs_ioctl_defrag_range_args *range,
3266 u64 newer_than, unsigned long max_pages);
3267 void btrfs_get_block_group_info(struct list_head *groups_list,
3268 struct btrfs_ioctl_space_info *space);
3269 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3270 struct btrfs_ioctl_balance_args *bargs);
3273 int __init btrfs_auto_defrag_init(void);
3274 void __cold btrfs_auto_defrag_exit(void);
3275 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3276 struct btrfs_inode *inode);
3277 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3278 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3279 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3280 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3282 extern const struct file_operations btrfs_file_operations;
3283 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3284 struct btrfs_root *root, struct inode *inode,
3285 struct btrfs_path *path, u64 start, u64 end,
3286 u64 *drop_end, int drop_cache,
3288 u32 extent_item_size,
3290 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3291 struct btrfs_root *root, struct inode *inode, u64 start,
3292 u64 end, int drop_cache);
3293 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3294 struct btrfs_inode *inode, u64 start, u64 end);
3295 int btrfs_release_file(struct inode *inode, struct file *file);
3296 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3297 size_t num_pages, loff_t pos, size_t write_bytes,
3298 struct extent_state **cached);
3299 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3300 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
3301 struct file *file_out, loff_t pos_out,
3302 loff_t len, unsigned int remap_flags);
3305 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3306 struct btrfs_root *root);
3309 int __init btrfs_init_sysfs(void);
3310 void __cold btrfs_exit_sysfs(void);
3311 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3312 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3315 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3316 unsigned long new_flags);
3317 int btrfs_sync_fs(struct super_block *sb, int wait);
3319 static inline __printf(2, 3) __cold
3320 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3324 #ifdef CONFIG_PRINTK
3327 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3329 #define btrfs_printk(fs_info, fmt, args...) \
3330 btrfs_no_printk(fs_info, fmt, ##args)
3333 #define btrfs_emerg(fs_info, fmt, args...) \
3334 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3335 #define btrfs_alert(fs_info, fmt, args...) \
3336 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3337 #define btrfs_crit(fs_info, fmt, args...) \
3338 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3339 #define btrfs_err(fs_info, fmt, args...) \
3340 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3341 #define btrfs_warn(fs_info, fmt, args...) \
3342 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3343 #define btrfs_notice(fs_info, fmt, args...) \
3344 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3345 #define btrfs_info(fs_info, fmt, args...) \
3346 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3349 * Wrappers that use printk_in_rcu
3351 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3352 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3353 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3354 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3355 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3356 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3357 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3358 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3359 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3360 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3361 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3362 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3363 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3364 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3367 * Wrappers that use a ratelimited printk_in_rcu
3369 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3370 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3371 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3372 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3373 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3374 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3375 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3376 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3377 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3378 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3379 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3380 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3381 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3382 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3385 * Wrappers that use a ratelimited printk
3387 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3388 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3389 #define btrfs_alert_rl(fs_info, fmt, args...) \
3390 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3391 #define btrfs_crit_rl(fs_info, fmt, args...) \
3392 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3393 #define btrfs_err_rl(fs_info, fmt, args...) \
3394 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3395 #define btrfs_warn_rl(fs_info, fmt, args...) \
3396 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3397 #define btrfs_notice_rl(fs_info, fmt, args...) \
3398 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3399 #define btrfs_info_rl(fs_info, fmt, args...) \
3400 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3402 #if defined(CONFIG_DYNAMIC_DEBUG)
3403 #define btrfs_debug(fs_info, fmt, args...) \
3405 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3406 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3407 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3409 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3411 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3412 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3413 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3415 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3417 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3418 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3419 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3422 #define btrfs_debug_rl(fs_info, fmt, args...) \
3424 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3425 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3426 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3429 #elif defined(DEBUG)
3430 #define btrfs_debug(fs_info, fmt, args...) \
3431 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3432 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3433 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3434 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3435 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3436 #define btrfs_debug_rl(fs_info, fmt, args...) \
3437 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3439 #define btrfs_debug(fs_info, fmt, args...) \
3440 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3441 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3442 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3443 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3444 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3445 #define btrfs_debug_rl(fs_info, fmt, args...) \
3446 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3449 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3452 btrfs_printk(fs_info, fmt, ##args); \
3453 rcu_read_unlock(); \
3456 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3459 btrfs_no_printk(fs_info, fmt, ##args); \
3460 rcu_read_unlock(); \
3463 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3465 static DEFINE_RATELIMIT_STATE(_rs, \
3466 DEFAULT_RATELIMIT_INTERVAL, \
3467 DEFAULT_RATELIMIT_BURST); \
3468 if (__ratelimit(&_rs)) \
3469 btrfs_printk(fs_info, fmt, ##args); \
3472 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3475 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3476 rcu_read_unlock(); \
3479 #ifdef CONFIG_BTRFS_ASSERT
3482 static inline void assfail(const char *expr, const char *file, int line)
3484 pr_err("assertion failed: %s, file: %s, line: %d\n",
3489 #define ASSERT(expr) \
3490 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3492 #define ASSERT(expr) ((void)0)
3496 * Use that for functions that are conditionally exported for sanity tests but
3499 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3500 #define EXPORT_FOR_TESTS static
3502 #define EXPORT_FOR_TESTS
3506 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3509 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3514 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3515 unsigned int line, int errno, const char *fmt, ...);
3517 const char *btrfs_decode_error(int errno);
3520 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3521 const char *function,
3522 unsigned int line, int errno);
3525 * Call btrfs_abort_transaction as early as possible when an error condition is
3526 * detected, that way the exact line number is reported.
3528 #define btrfs_abort_transaction(trans, errno) \
3530 /* Report first abort since mount */ \
3531 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3532 &((trans)->fs_info->fs_state))) { \
3533 if ((errno) != -EIO) { \
3534 WARN(1, KERN_DEBUG \
3535 "BTRFS: Transaction aborted (error %d)\n", \
3538 btrfs_debug((trans)->fs_info, \
3539 "Transaction aborted (error %d)", \
3543 __btrfs_abort_transaction((trans), __func__, \
3544 __LINE__, (errno)); \
3547 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3549 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3550 (errno), fmt, ##args); \
3555 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3556 unsigned int line, int errno, const char *fmt, ...);
3558 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3559 * will panic(). Otherwise we BUG() here.
3561 #define btrfs_panic(fs_info, errno, fmt, args...) \
3563 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3568 /* compatibility and incompatibility defines */
3570 #define btrfs_set_fs_incompat(__fs_info, opt) \
3571 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3573 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3576 struct btrfs_super_block *disk_super;
3579 disk_super = fs_info->super_copy;
3580 features = btrfs_super_incompat_flags(disk_super);
3581 if (!(features & flag)) {
3582 spin_lock(&fs_info->super_lock);
3583 features = btrfs_super_incompat_flags(disk_super);
3584 if (!(features & flag)) {
3586 btrfs_set_super_incompat_flags(disk_super, features);
3587 btrfs_info(fs_info, "setting %llu feature flag",
3590 spin_unlock(&fs_info->super_lock);
3594 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3595 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3597 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3600 struct btrfs_super_block *disk_super;
3603 disk_super = fs_info->super_copy;
3604 features = btrfs_super_incompat_flags(disk_super);
3605 if (features & flag) {
3606 spin_lock(&fs_info->super_lock);
3607 features = btrfs_super_incompat_flags(disk_super);
3608 if (features & flag) {
3610 btrfs_set_super_incompat_flags(disk_super, features);
3611 btrfs_info(fs_info, "clearing %llu feature flag",
3614 spin_unlock(&fs_info->super_lock);
3618 #define btrfs_fs_incompat(fs_info, opt) \
3619 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3621 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3623 struct btrfs_super_block *disk_super;
3624 disk_super = fs_info->super_copy;
3625 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3628 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3629 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3631 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3634 struct btrfs_super_block *disk_super;
3637 disk_super = fs_info->super_copy;
3638 features = btrfs_super_compat_ro_flags(disk_super);
3639 if (!(features & flag)) {
3640 spin_lock(&fs_info->super_lock);
3641 features = btrfs_super_compat_ro_flags(disk_super);
3642 if (!(features & flag)) {
3644 btrfs_set_super_compat_ro_flags(disk_super, features);
3645 btrfs_info(fs_info, "setting %llu ro feature flag",
3648 spin_unlock(&fs_info->super_lock);
3652 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3653 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3655 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3658 struct btrfs_super_block *disk_super;
3661 disk_super = fs_info->super_copy;
3662 features = btrfs_super_compat_ro_flags(disk_super);
3663 if (features & flag) {
3664 spin_lock(&fs_info->super_lock);
3665 features = btrfs_super_compat_ro_flags(disk_super);
3666 if (features & flag) {
3668 btrfs_set_super_compat_ro_flags(disk_super, features);
3669 btrfs_info(fs_info, "clearing %llu ro feature flag",
3672 spin_unlock(&fs_info->super_lock);
3676 #define btrfs_fs_compat_ro(fs_info, opt) \
3677 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3679 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3681 struct btrfs_super_block *disk_super;
3682 disk_super = fs_info->super_copy;
3683 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3687 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3688 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3689 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3690 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3691 struct inode *inode, struct inode *dir);
3693 #define btrfs_get_acl NULL
3694 #define btrfs_set_acl NULL
3695 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3696 struct inode *inode, struct inode *dir)
3703 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3704 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3705 struct btrfs_root *root);
3706 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3707 struct btrfs_root *root);
3708 int btrfs_recover_relocation(struct btrfs_root *root);
3709 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3710 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3711 struct btrfs_root *root, struct extent_buffer *buf,
3712 struct extent_buffer *cow);
3713 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3714 u64 *bytes_to_reserve);
3715 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3716 struct btrfs_pending_snapshot *pending);
3719 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3720 u64 end, struct btrfs_scrub_progress *progress,
3721 int readonly, int is_dev_replace);
3722 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3723 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3724 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3725 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3726 struct btrfs_device *dev);
3727 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3728 struct btrfs_scrub_progress *progress);
3729 static inline void btrfs_init_full_stripe_locks_tree(
3730 struct btrfs_full_stripe_locks_tree *locks_root)
3732 locks_root->root = RB_ROOT;
3733 mutex_init(&locks_root->lock);
3737 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3738 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3739 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3741 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3743 btrfs_bio_counter_sub(fs_info, 1);
3747 struct reada_control {
3748 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3749 struct btrfs_key key_start;
3750 struct btrfs_key key_end; /* exclusive */
3753 wait_queue_head_t wait;
3755 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3756 struct btrfs_key *start, struct btrfs_key *end);
3757 int btrfs_reada_wait(void *handle);
3758 void btrfs_reada_detach(void *handle);
3759 int btree_readahead_hook(struct extent_buffer *eb, int err);
3761 static inline int is_fstree(u64 rootid)
3763 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3764 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3765 !btrfs_qgroup_level(rootid)))
3770 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3772 return signal_pending(current);
3775 /* Sanity test specific functions */
3776 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3777 void btrfs_test_inode_set_ops(struct inode *inode);
3778 void btrfs_test_destroy_inode(struct inode *inode);
3780 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3782 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3785 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3791 static inline void cond_wake_up(struct wait_queue_head *wq)
3794 * This implies a full smp_mb barrier, see comments for
3795 * waitqueue_active why.
3797 if (wq_has_sleeper(wq))
3801 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3804 * Special case for conditional wakeup where the barrier required for
3805 * waitqueue_active is implied by some of the preceding code. Eg. one
3806 * of such atomic operations (atomic_dec_and_return, ...), or a
3807 * unlock/lock sequence, etc.
3809 if (waitqueue_active(wq))