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 struct btrfs_delayed_ref_root;
39 extern struct kmem_cache *btrfs_trans_handle_cachep;
40 extern struct kmem_cache *btrfs_bit_radix_cachep;
41 extern struct kmem_cache *btrfs_path_cachep;
42 extern struct kmem_cache *btrfs_free_space_cachep;
43 struct btrfs_ordered_sum;
45 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
47 #define BTRFS_MAX_MIRRORS 3
49 #define BTRFS_MAX_LEVEL 8
51 #define BTRFS_OLDEST_GENERATION 0ULL
54 * the max metadata block size. This limit is somewhat artificial,
55 * but the memmove costs go through the roof for larger blocks.
57 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
60 * we can actually store much bigger names, but lets not confuse the rest
63 #define BTRFS_NAME_LEN 255
66 * Theoretical limit is larger, but we keep this down to a sane
67 * value. That should limit greatly the possibility of collisions on
70 #define BTRFS_LINK_MAX 65535U
72 /* four bytes for CRC32 */
73 static const int btrfs_csum_sizes[] = { 4 };
75 #define BTRFS_EMPTY_DIR_SIZE 0
77 /* ioprio of readahead is set to idle */
78 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
80 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
83 * Use large batch size to reduce overhead of metadata updates. On the reader
84 * side, we only read it when we are close to ENOSPC and the read overhead is
85 * mostly related to the number of CPUs, so it is OK to use arbitrary large
88 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
90 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
94 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
96 static inline u32 count_max_extents(u64 size)
98 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
101 struct btrfs_mapping_tree {
102 struct extent_map_tree map_tree;
105 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
107 BUG_ON(num_stripes == 0);
108 return sizeof(struct btrfs_chunk) +
109 sizeof(struct btrfs_stripe) * (num_stripes - 1);
113 * Runtime (in-memory) states of filesystem
116 /* Global indicator of serious filesystem errors */
117 BTRFS_FS_STATE_ERROR,
119 * Filesystem is being remounted, allow to skip some operations, like
122 BTRFS_FS_STATE_REMOUNTING,
123 /* Track if a transaction abort has been reported on this filesystem */
124 BTRFS_FS_STATE_TRANS_ABORTED,
126 * Bio operations should be blocked on this filesystem because a source
127 * or target device is being destroyed as part of a device replace
129 BTRFS_FS_STATE_DEV_REPLACING,
130 /* The btrfs_fs_info created for self-tests */
131 BTRFS_FS_STATE_DUMMY_FS_INFO,
134 #define BTRFS_BACKREF_REV_MAX 256
135 #define BTRFS_BACKREF_REV_SHIFT 56
136 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
137 BTRFS_BACKREF_REV_SHIFT)
139 #define BTRFS_OLD_BACKREF_REV 0
140 #define BTRFS_MIXED_BACKREF_REV 1
143 * every tree block (leaf or node) starts with this header.
145 struct btrfs_header {
146 /* these first four must match the super block */
147 u8 csum[BTRFS_CSUM_SIZE];
148 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
149 __le64 bytenr; /* which block this node is supposed to live in */
152 /* allowed to be different from the super from here on down */
153 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
158 } __attribute__ ((__packed__));
161 * this is a very generous portion of the super block, giving us
162 * room to translate 14 chunks with 3 stripes each.
164 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
167 * just in case we somehow lose the roots and are not able to mount,
168 * we store an array of the roots from previous transactions
171 #define BTRFS_NUM_BACKUP_ROOTS 4
172 struct btrfs_root_backup {
174 __le64 tree_root_gen;
177 __le64 chunk_root_gen;
180 __le64 extent_root_gen;
189 __le64 csum_root_gen;
199 u8 extent_root_level;
203 /* future and to align */
205 } __attribute__ ((__packed__));
208 * the super block basically lists the main trees of the FS
209 * it currently lacks any block count etc etc
211 struct btrfs_super_block {
212 /* the first 4 fields must match struct btrfs_header */
213 u8 csum[BTRFS_CSUM_SIZE];
214 /* FS specific UUID, visible to user */
215 u8 fsid[BTRFS_FSID_SIZE];
216 __le64 bytenr; /* this block number */
219 /* allowed to be different from the btrfs_header from here own down */
226 /* this will help find the new super based on the log root */
227 __le64 log_root_transid;
230 __le64 root_dir_objectid;
234 __le32 __unused_leafsize;
236 __le32 sys_chunk_array_size;
237 __le64 chunk_root_generation;
239 __le64 compat_ro_flags;
240 __le64 incompat_flags;
245 struct btrfs_dev_item dev_item;
247 char label[BTRFS_LABEL_SIZE];
249 __le64 cache_generation;
250 __le64 uuid_tree_generation;
252 /* the UUID written into btree blocks */
253 u8 metadata_uuid[BTRFS_FSID_SIZE];
255 /* future expansion */
257 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
258 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
259 } __attribute__ ((__packed__));
262 * Compat flags that we support. If any incompat flags are set other than the
263 * ones specified below then we will fail to mount
265 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
266 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
267 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
269 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
270 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
271 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
273 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
274 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
276 #define BTRFS_FEATURE_INCOMPAT_SUPP \
277 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
278 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
279 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
280 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
281 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
282 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
283 BTRFS_FEATURE_INCOMPAT_RAID56 | \
284 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
285 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
286 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
287 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
289 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
290 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
291 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
294 * A leaf is full of items. offset and size tell us where to find
295 * the item in the leaf (relative to the start of the data area)
298 struct btrfs_disk_key key;
301 } __attribute__ ((__packed__));
304 * leaves have an item area and a data area:
305 * [item0, item1....itemN] [free space] [dataN...data1, data0]
307 * The data is separate from the items to get the keys closer together
311 struct btrfs_header header;
312 struct btrfs_item items[];
313 } __attribute__ ((__packed__));
316 * all non-leaf blocks are nodes, they hold only keys and pointers to
319 struct btrfs_key_ptr {
320 struct btrfs_disk_key key;
323 } __attribute__ ((__packed__));
326 struct btrfs_header header;
327 struct btrfs_key_ptr ptrs[];
328 } __attribute__ ((__packed__));
331 * btrfs_paths remember the path taken from the root down to the leaf.
332 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
333 * to any other levels that are present.
335 * The slots array records the index of the item or block pointer
336 * used while walking the tree.
338 enum { READA_NONE, READA_BACK, READA_FORWARD };
340 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
341 int slots[BTRFS_MAX_LEVEL];
342 /* if there is real range locking, this locks field will change */
343 u8 locks[BTRFS_MAX_LEVEL];
345 /* keep some upper locks as we walk down */
349 * set by btrfs_split_item, tells search_slot to keep all locks
350 * and to force calls to keep space in the nodes
352 unsigned int search_for_split:1;
353 unsigned int keep_locks:1;
354 unsigned int skip_locking:1;
355 unsigned int leave_spinning:1;
356 unsigned int search_commit_root:1;
357 unsigned int need_commit_sem:1;
358 unsigned int skip_release_on_error:1;
360 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
361 sizeof(struct btrfs_item))
362 struct btrfs_dev_replace {
363 u64 replace_state; /* see #define above */
364 time64_t time_started; /* seconds since 1-Jan-1970 */
365 time64_t time_stopped; /* seconds since 1-Jan-1970 */
366 atomic64_t num_write_errors;
367 atomic64_t num_uncorrectable_read_errors;
370 u64 committed_cursor_left;
371 u64 cursor_left_last_write_of_item;
374 u64 cont_reading_from_srcdev_mode; /* see #define above */
377 int item_needs_writeback;
378 struct btrfs_device *srcdev;
379 struct btrfs_device *tgtdev;
381 struct mutex lock_finishing_cancel_unmount;
382 struct rw_semaphore rwsem;
384 struct btrfs_scrub_progress scrub_progress;
386 struct percpu_counter bio_counter;
387 wait_queue_head_t replace_wait;
390 /* For raid type sysfs entries */
391 struct raid_kobject {
394 struct list_head list;
397 struct btrfs_space_info {
400 u64 total_bytes; /* total bytes in the space,
401 this doesn't take mirrors into account */
402 u64 bytes_used; /* total bytes used,
403 this doesn't take mirrors into account */
404 u64 bytes_pinned; /* total bytes pinned, will be freed when the
405 transaction finishes */
406 u64 bytes_reserved; /* total bytes the allocator has reserved for
407 current allocations */
408 u64 bytes_may_use; /* number of bytes that may be used for
409 delalloc/allocations */
410 u64 bytes_readonly; /* total bytes that are read only */
412 u64 max_extent_size; /* This will hold the maximum extent size of
413 the space info if we had an ENOSPC in the
416 unsigned int full:1; /* indicates that we cannot allocate any more
417 chunks for this space */
418 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
420 unsigned int flush:1; /* set if we are trying to make space */
422 unsigned int force_alloc; /* set if we need to force a chunk
423 alloc for this space */
425 u64 disk_used; /* total bytes used on disk */
426 u64 disk_total; /* total bytes on disk, takes mirrors into
432 * bytes_pinned is kept in line with what is actually pinned, as in
433 * we've called update_block_group and dropped the bytes_used counter
434 * and increased the bytes_pinned counter. However this means that
435 * bytes_pinned does not reflect the bytes that will be pinned once the
436 * delayed refs are flushed, so this counter is inc'ed every time we
437 * call btrfs_free_extent so it is a realtime count of what will be
438 * freed once the transaction is committed. It will be zeroed every
439 * time the transaction commits.
441 struct percpu_counter total_bytes_pinned;
443 struct list_head list;
444 /* Protected by the spinlock 'lock'. */
445 struct list_head ro_bgs;
446 struct list_head priority_tickets;
447 struct list_head tickets;
449 * tickets_id just indicates the next ticket will be handled, so note
450 * it's not stored per ticket.
454 struct rw_semaphore groups_sem;
455 /* for block groups in our same type */
456 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
457 wait_queue_head_t wait;
460 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
464 * Types of block reserves
467 BTRFS_BLOCK_RSV_GLOBAL,
468 BTRFS_BLOCK_RSV_DELALLOC,
469 BTRFS_BLOCK_RSV_TRANS,
470 BTRFS_BLOCK_RSV_CHUNK,
471 BTRFS_BLOCK_RSV_DELOPS,
472 BTRFS_BLOCK_RSV_DELREFS,
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 {
538 BTRFS_CACHE_FINISHED,
542 enum btrfs_disk_cache_state {
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,
791 /* Indicate that the cleaner thread is awake and doing something. */
792 BTRFS_FS_CLEANER_RUNNING,
795 struct btrfs_fs_info {
796 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
798 struct btrfs_root *extent_root;
799 struct btrfs_root *tree_root;
800 struct btrfs_root *chunk_root;
801 struct btrfs_root *dev_root;
802 struct btrfs_root *fs_root;
803 struct btrfs_root *csum_root;
804 struct btrfs_root *quota_root;
805 struct btrfs_root *uuid_root;
806 struct btrfs_root *free_space_root;
808 /* the log root tree is a directory of all the other log roots */
809 struct btrfs_root *log_root_tree;
811 spinlock_t fs_roots_radix_lock;
812 struct radix_tree_root fs_roots_radix;
814 /* block group cache stuff */
815 spinlock_t block_group_cache_lock;
816 u64 first_logical_byte;
817 struct rb_root block_group_cache_tree;
819 /* keep track of unallocated space */
820 atomic64_t free_chunk_space;
822 struct extent_io_tree freed_extents[2];
823 struct extent_io_tree *pinned_extents;
825 /* logical->physical extent mapping */
826 struct btrfs_mapping_tree mapping_tree;
829 * block reservation for extent, checksum, root tree and
830 * delayed dir index item
832 struct btrfs_block_rsv global_block_rsv;
833 /* block reservation for metadata operations */
834 struct btrfs_block_rsv trans_block_rsv;
835 /* block reservation for chunk tree */
836 struct btrfs_block_rsv chunk_block_rsv;
837 /* block reservation for delayed operations */
838 struct btrfs_block_rsv delayed_block_rsv;
839 /* block reservation for delayed refs */
840 struct btrfs_block_rsv delayed_refs_rsv;
842 struct btrfs_block_rsv empty_block_rsv;
845 u64 last_trans_committed;
846 u64 avg_delayed_ref_runtime;
849 * this is updated to the current trans every time a full commit
850 * is required instead of the faster short fsync log commits
852 u64 last_trans_log_full_commit;
853 unsigned long mount_opt;
855 * Track requests for actions that need to be done during transaction
856 * commit (like for some mount options).
858 unsigned long pending_changes;
859 unsigned long compress_type:4;
860 unsigned int compress_level;
863 * It is a suggestive number, the read side is safe even it gets a
864 * wrong number because we will write out the data into a regular
865 * extent. The write side(mount/remount) is under ->s_umount lock,
866 * so it is also safe.
870 struct btrfs_transaction *running_transaction;
871 wait_queue_head_t transaction_throttle;
872 wait_queue_head_t transaction_wait;
873 wait_queue_head_t transaction_blocked_wait;
874 wait_queue_head_t async_submit_wait;
877 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
878 * when they are updated.
880 * Because we do not clear the flags for ever, so we needn't use
881 * the lock on the read side.
883 * We also needn't use the lock when we mount the fs, because
884 * there is no other task which will update the flag.
886 spinlock_t super_lock;
887 struct btrfs_super_block *super_copy;
888 struct btrfs_super_block *super_for_commit;
889 struct super_block *sb;
890 struct inode *btree_inode;
891 struct mutex tree_log_mutex;
892 struct mutex transaction_kthread_mutex;
893 struct mutex cleaner_mutex;
894 struct mutex chunk_mutex;
897 * this is taken to make sure we don't set block groups ro after
898 * the free space cache has been allocated on them
900 struct mutex ro_block_group_mutex;
902 /* this is used during read/modify/write to make sure
903 * no two ios are trying to mod the same stripe at the same
906 struct btrfs_stripe_hash_table *stripe_hash_table;
909 * this protects the ordered operations list only while we are
910 * processing all of the entries on it. This way we make
911 * sure the commit code doesn't find the list temporarily empty
912 * because another function happens to be doing non-waiting preflush
913 * before jumping into the main commit.
915 struct mutex ordered_operations_mutex;
917 struct rw_semaphore commit_root_sem;
919 struct rw_semaphore cleanup_work_sem;
921 struct rw_semaphore subvol_sem;
922 struct srcu_struct subvol_srcu;
924 spinlock_t trans_lock;
926 * the reloc mutex goes with the trans lock, it is taken
927 * during commit to protect us from the relocation code
929 struct mutex reloc_mutex;
931 struct list_head trans_list;
932 struct list_head dead_roots;
933 struct list_head caching_block_groups;
935 spinlock_t delayed_iput_lock;
936 struct list_head delayed_iputs;
937 struct mutex cleaner_delayed_iput_mutex;
939 /* this protects tree_mod_seq_list */
940 spinlock_t tree_mod_seq_lock;
941 atomic64_t tree_mod_seq;
942 struct list_head tree_mod_seq_list;
944 /* this protects tree_mod_log */
945 rwlock_t tree_mod_log_lock;
946 struct rb_root tree_mod_log;
948 atomic_t async_delalloc_pages;
951 * this is used to protect the following list -- ordered_roots.
953 spinlock_t ordered_root_lock;
956 * all fs/file tree roots in which there are data=ordered extents
957 * pending writeback are added into this list.
959 * these can span multiple transactions and basically include
960 * every dirty data page that isn't from nodatacow
962 struct list_head ordered_roots;
964 struct mutex delalloc_root_mutex;
965 spinlock_t delalloc_root_lock;
966 /* all fs/file tree roots that have delalloc inodes. */
967 struct list_head delalloc_roots;
970 * there is a pool of worker threads for checksumming during writes
971 * and a pool for checksumming after reads. This is because readers
972 * can run with FS locks held, and the writers may be waiting for
973 * those locks. We don't want ordering in the pending list to cause
974 * deadlocks, and so the two are serviced separately.
976 * A third pool does submit_bio to avoid deadlocking with the other
979 struct btrfs_workqueue *workers;
980 struct btrfs_workqueue *delalloc_workers;
981 struct btrfs_workqueue *flush_workers;
982 struct btrfs_workqueue *endio_workers;
983 struct btrfs_workqueue *endio_meta_workers;
984 struct btrfs_workqueue *endio_raid56_workers;
985 struct btrfs_workqueue *endio_repair_workers;
986 struct btrfs_workqueue *rmw_workers;
987 struct btrfs_workqueue *endio_meta_write_workers;
988 struct btrfs_workqueue *endio_write_workers;
989 struct btrfs_workqueue *endio_freespace_worker;
990 struct btrfs_workqueue *submit_workers;
991 struct btrfs_workqueue *caching_workers;
992 struct btrfs_workqueue *readahead_workers;
995 * fixup workers take dirty pages that didn't properly go through
996 * the cow mechanism and make them safe to write. It happens
997 * for the sys_munmap function call path
999 struct btrfs_workqueue *fixup_workers;
1000 struct btrfs_workqueue *delayed_workers;
1002 /* the extent workers do delayed refs on the extent allocation tree */
1003 struct btrfs_workqueue *extent_workers;
1004 struct task_struct *transaction_kthread;
1005 struct task_struct *cleaner_kthread;
1006 u32 thread_pool_size;
1008 struct kobject *space_info_kobj;
1009 struct list_head pending_raid_kobjs;
1010 spinlock_t pending_raid_kobjs_lock; /* uncontended */
1014 /* used to keep from writing metadata until there is a nice batch */
1015 struct percpu_counter dirty_metadata_bytes;
1016 struct percpu_counter delalloc_bytes;
1017 s32 dirty_metadata_batch;
1020 struct list_head dirty_cowonly_roots;
1022 struct btrfs_fs_devices *fs_devices;
1025 * The space_info list is effectively read only after initial
1026 * setup. It is populated at mount time and cleaned up after
1027 * all block groups are removed. RCU is used to protect it.
1029 struct list_head space_info;
1031 struct btrfs_space_info *data_sinfo;
1033 struct reloc_control *reloc_ctl;
1035 /* data_alloc_cluster is only used in ssd_spread mode */
1036 struct btrfs_free_cluster data_alloc_cluster;
1038 /* all metadata allocations go through this cluster */
1039 struct btrfs_free_cluster meta_alloc_cluster;
1041 /* auto defrag inodes go here */
1042 spinlock_t defrag_inodes_lock;
1043 struct rb_root defrag_inodes;
1044 atomic_t defrag_running;
1046 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1047 seqlock_t profiles_lock;
1049 * these three are in extended format (availability of single
1050 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1051 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1053 u64 avail_data_alloc_bits;
1054 u64 avail_metadata_alloc_bits;
1055 u64 avail_system_alloc_bits;
1057 /* restriper state */
1058 spinlock_t balance_lock;
1059 struct mutex balance_mutex;
1060 atomic_t balance_pause_req;
1061 atomic_t balance_cancel_req;
1062 struct btrfs_balance_control *balance_ctl;
1063 wait_queue_head_t balance_wait_q;
1065 u32 data_chunk_allocations;
1070 /* private scrub information */
1071 struct mutex scrub_lock;
1072 atomic_t scrubs_running;
1073 atomic_t scrub_pause_req;
1074 atomic_t scrubs_paused;
1075 atomic_t scrub_cancel_req;
1076 wait_queue_head_t scrub_pause_wait;
1077 int scrub_workers_refcnt;
1078 struct btrfs_workqueue *scrub_workers;
1079 struct btrfs_workqueue *scrub_wr_completion_workers;
1080 struct btrfs_workqueue *scrub_nocow_workers;
1081 struct btrfs_workqueue *scrub_parity_workers;
1083 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1084 u32 check_integrity_print_mask;
1086 /* is qgroup tracking in a consistent state? */
1089 /* holds configuration and tracking. Protected by qgroup_lock */
1090 struct rb_root qgroup_tree;
1091 struct rb_root qgroup_op_tree;
1092 spinlock_t qgroup_lock;
1093 spinlock_t qgroup_op_lock;
1094 atomic_t qgroup_op_seq;
1097 * used to avoid frequently calling ulist_alloc()/ulist_free()
1098 * when doing qgroup accounting, it must be protected by qgroup_lock.
1100 struct ulist *qgroup_ulist;
1102 /* protect user change for quota operations */
1103 struct mutex qgroup_ioctl_lock;
1105 /* list of dirty qgroups to be written at next commit */
1106 struct list_head dirty_qgroups;
1108 /* used by qgroup for an efficient tree traversal */
1111 /* qgroup rescan items */
1112 struct mutex qgroup_rescan_lock; /* protects the progress item */
1113 struct btrfs_key qgroup_rescan_progress;
1114 struct btrfs_workqueue *qgroup_rescan_workers;
1115 struct completion qgroup_rescan_completion;
1116 struct btrfs_work qgroup_rescan_work;
1117 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1119 /* filesystem state */
1120 unsigned long fs_state;
1122 struct btrfs_delayed_root *delayed_root;
1124 /* readahead tree */
1125 spinlock_t reada_lock;
1126 struct radix_tree_root reada_tree;
1128 /* readahead works cnt */
1129 atomic_t reada_works_cnt;
1131 /* Extent buffer radix tree */
1132 spinlock_t buffer_lock;
1133 struct radix_tree_root buffer_radix;
1135 /* next backup root to be overwritten */
1136 int backup_root_index;
1138 /* device replace state */
1139 struct btrfs_dev_replace dev_replace;
1141 struct semaphore uuid_tree_rescan_sem;
1143 /* Used to reclaim the metadata space in the background. */
1144 struct work_struct async_reclaim_work;
1146 spinlock_t unused_bgs_lock;
1147 struct list_head unused_bgs;
1148 struct mutex unused_bg_unpin_mutex;
1149 struct mutex delete_unused_bgs_mutex;
1152 * Chunks that can't be freed yet (under a trim/discard operation)
1153 * and will be latter freed. Protected by fs_info->chunk_mutex.
1155 struct list_head pinned_chunks;
1157 /* Cached block sizes */
1162 /* Block groups and devices containing active swapfiles. */
1163 spinlock_t swapfile_pins_lock;
1164 struct rb_root swapfile_pins;
1166 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1167 spinlock_t ref_verify_lock;
1168 struct rb_root block_tree;
1172 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1174 return sb->s_fs_info;
1177 struct btrfs_subvolume_writers {
1178 struct percpu_counter counter;
1179 wait_queue_head_t wait;
1183 * The state of btrfs root
1187 * btrfs_record_root_in_trans is a multi-step process, and it can race
1188 * with the balancing code. But the race is very small, and only the
1189 * first time the root is added to each transaction. So IN_TRANS_SETUP
1190 * is used to tell us when more checks are required
1192 BTRFS_ROOT_IN_TRANS_SETUP,
1193 BTRFS_ROOT_REF_COWS,
1194 BTRFS_ROOT_TRACK_DIRTY,
1195 BTRFS_ROOT_IN_RADIX,
1196 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1197 BTRFS_ROOT_DEFRAG_RUNNING,
1198 BTRFS_ROOT_FORCE_COW,
1199 BTRFS_ROOT_MULTI_LOG_TASKS,
1201 BTRFS_ROOT_DELETING,
1205 * in ram representation of the tree. extent_root is used for all allocations
1206 * and for the extent tree extent_root root.
1209 struct extent_buffer *node;
1211 struct extent_buffer *commit_root;
1212 struct btrfs_root *log_root;
1213 struct btrfs_root *reloc_root;
1215 unsigned long state;
1216 struct btrfs_root_item root_item;
1217 struct btrfs_key root_key;
1218 struct btrfs_fs_info *fs_info;
1219 struct extent_io_tree dirty_log_pages;
1221 struct mutex objectid_mutex;
1223 spinlock_t accounting_lock;
1224 struct btrfs_block_rsv *block_rsv;
1226 /* free ino cache stuff */
1227 struct btrfs_free_space_ctl *free_ino_ctl;
1228 enum btrfs_caching_type ino_cache_state;
1229 spinlock_t ino_cache_lock;
1230 wait_queue_head_t ino_cache_wait;
1231 struct btrfs_free_space_ctl *free_ino_pinned;
1232 u64 ino_cache_progress;
1233 struct inode *ino_cache_inode;
1235 struct mutex log_mutex;
1236 wait_queue_head_t log_writer_wait;
1237 wait_queue_head_t log_commit_wait[2];
1238 struct list_head log_ctxs[2];
1239 atomic_t log_writers;
1240 atomic_t log_commit[2];
1243 /* No matter the commit succeeds or not*/
1244 int log_transid_committed;
1245 /* Just be updated when the commit succeeds. */
1246 int last_log_commit;
1247 pid_t log_start_pid;
1253 u64 highest_objectid;
1255 u64 defrag_trans_start;
1256 struct btrfs_key defrag_progress;
1257 struct btrfs_key defrag_max;
1259 /* the dirty list is only used by non-reference counted roots */
1260 struct list_head dirty_list;
1262 struct list_head root_list;
1264 spinlock_t log_extents_lock[2];
1265 struct list_head logged_list[2];
1267 int orphan_cleanup_state;
1269 spinlock_t inode_lock;
1270 /* red-black tree that keeps track of in-memory inodes */
1271 struct rb_root inode_tree;
1274 * radix tree that keeps track of delayed nodes of every inode,
1275 * protected by inode_lock
1277 struct radix_tree_root delayed_nodes_tree;
1279 * right now this just gets used so that a root has its own devid
1280 * for stat. It may be used for more later
1284 spinlock_t root_item_lock;
1287 struct mutex delalloc_mutex;
1288 spinlock_t delalloc_lock;
1290 * all of the inodes that have delalloc bytes. It is possible for
1291 * this list to be empty even when there is still dirty data=ordered
1292 * extents waiting to finish IO.
1294 struct list_head delalloc_inodes;
1295 struct list_head delalloc_root;
1296 u64 nr_delalloc_inodes;
1298 struct mutex ordered_extent_mutex;
1300 * this is used by the balancing code to wait for all the pending
1303 spinlock_t ordered_extent_lock;
1306 * all of the data=ordered extents pending writeback
1307 * these can span multiple transactions and basically include
1308 * every dirty data page that isn't from nodatacow
1310 struct list_head ordered_extents;
1311 struct list_head ordered_root;
1312 u64 nr_ordered_extents;
1315 * Number of currently running SEND ioctls to prevent
1316 * manipulation with the read-only status via SUBVOL_SETFLAGS
1318 int send_in_progress;
1319 struct btrfs_subvolume_writers *subv_writers;
1320 atomic_t will_be_snapshotted;
1321 atomic_t snapshot_force_cow;
1323 /* For qgroup metadata reserved space */
1324 spinlock_t qgroup_meta_rsv_lock;
1325 u64 qgroup_meta_rsv_pertrans;
1326 u64 qgroup_meta_rsv_prealloc;
1328 /* Number of active swapfiles */
1329 atomic_t nr_swapfiles;
1331 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1336 struct btrfs_file_private {
1340 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1342 return btrfs_sb(inode->i_sb)->sectorsize;
1345 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1348 return info->nodesize - sizeof(struct btrfs_header);
1351 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1353 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1355 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1358 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1360 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1363 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1364 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1365 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1367 return BTRFS_MAX_ITEM_SIZE(info) -
1368 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1371 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1373 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1377 * Flags for mount options.
1379 * Note: don't forget to add new options to btrfs_show_options()
1381 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1382 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1383 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1384 #define BTRFS_MOUNT_SSD (1 << 3)
1385 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1386 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1387 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1388 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1389 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1390 #define BTRFS_MOUNT_NOSSD (1 << 9)
1391 #define BTRFS_MOUNT_DISCARD (1 << 10)
1392 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1393 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1394 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1395 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1396 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1397 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1398 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1399 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1400 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1401 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1402 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1403 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1404 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1405 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1406 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1407 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1408 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1409 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1411 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1412 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1414 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1415 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1416 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1417 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1420 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1422 if (!btrfs_test_opt(fs_info, opt)) \
1423 btrfs_info(fs_info, fmt, ##args); \
1424 btrfs_set_opt(fs_info->mount_opt, opt); \
1427 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1429 if (btrfs_test_opt(fs_info, opt)) \
1430 btrfs_info(fs_info, fmt, ##args); \
1431 btrfs_clear_opt(fs_info->mount_opt, opt); \
1434 #ifdef CONFIG_BTRFS_DEBUG
1436 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1438 struct btrfs_fs_info *fs_info = block_group->fs_info;
1440 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1441 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1442 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1443 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1448 * Requests for changes that need to be done during transaction commit.
1450 * Internal mount options that are used for special handling of the real
1451 * mount options (eg. cannot be set during remount and have to be set during
1452 * transaction commit)
1455 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1456 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1457 #define BTRFS_PENDING_COMMIT (2)
1459 #define btrfs_test_pending(info, opt) \
1460 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1461 #define btrfs_set_pending(info, opt) \
1462 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1463 #define btrfs_clear_pending(info, opt) \
1464 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1467 * Helpers for setting pending mount option changes.
1469 * Expects corresponding macros
1470 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1472 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1474 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1475 btrfs_info((info), fmt, ##args); \
1476 btrfs_set_pending((info), SET_##opt); \
1477 btrfs_clear_pending((info), CLEAR_##opt); \
1481 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1483 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1484 btrfs_info((info), fmt, ##args); \
1485 btrfs_set_pending((info), CLEAR_##opt); \
1486 btrfs_clear_pending((info), SET_##opt); \
1493 #define BTRFS_INODE_NODATASUM (1 << 0)
1494 #define BTRFS_INODE_NODATACOW (1 << 1)
1495 #define BTRFS_INODE_READONLY (1 << 2)
1496 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1497 #define BTRFS_INODE_PREALLOC (1 << 4)
1498 #define BTRFS_INODE_SYNC (1 << 5)
1499 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1500 #define BTRFS_INODE_APPEND (1 << 7)
1501 #define BTRFS_INODE_NODUMP (1 << 8)
1502 #define BTRFS_INODE_NOATIME (1 << 9)
1503 #define BTRFS_INODE_DIRSYNC (1 << 10)
1504 #define BTRFS_INODE_COMPRESS (1 << 11)
1506 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1508 struct btrfs_map_token {
1509 const struct extent_buffer *eb;
1511 unsigned long offset;
1514 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1515 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1517 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1519 token->kaddr = NULL;
1522 /* some macros to generate set/get functions for the struct fields. This
1523 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1526 #define le8_to_cpu(v) (v)
1527 #define cpu_to_le8(v) (v)
1530 #define read_eb_member(eb, ptr, type, member, result) (\
1531 read_extent_buffer(eb, (char *)(result), \
1532 ((unsigned long)(ptr)) + \
1533 offsetof(type, member), \
1534 sizeof(((type *)0)->member)))
1536 #define write_eb_member(eb, ptr, type, member, result) (\
1537 write_extent_buffer(eb, (char *)(result), \
1538 ((unsigned long)(ptr)) + \
1539 offsetof(type, member), \
1540 sizeof(((type *)0)->member)))
1542 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1543 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1544 const void *ptr, unsigned long off, \
1545 struct btrfs_map_token *token); \
1546 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1547 unsigned long off, u##bits val, \
1548 struct btrfs_map_token *token); \
1549 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1551 unsigned long off) \
1553 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1555 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1556 unsigned long off, u##bits val) \
1558 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1561 DECLARE_BTRFS_SETGET_BITS(8)
1562 DECLARE_BTRFS_SETGET_BITS(16)
1563 DECLARE_BTRFS_SETGET_BITS(32)
1564 DECLARE_BTRFS_SETGET_BITS(64)
1566 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1567 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1570 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1571 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1573 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1576 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1577 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1579 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1581 struct btrfs_map_token *token) \
1583 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1584 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1586 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1587 type *s, u##bits val, \
1588 struct btrfs_map_token *token) \
1590 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1591 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1594 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1595 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1597 const type *p = page_address(eb->pages[0]); \
1598 u##bits res = le##bits##_to_cpu(p->member); \
1601 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1604 type *p = page_address(eb->pages[0]); \
1605 p->member = cpu_to_le##bits(val); \
1608 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1609 static inline u##bits btrfs_##name(const type *s) \
1611 return le##bits##_to_cpu(s->member); \
1613 static inline void btrfs_set_##name(type *s, u##bits val) \
1615 s->member = cpu_to_le##bits(val); \
1619 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1620 struct btrfs_dev_item *s)
1622 BUILD_BUG_ON(sizeof(u64) !=
1623 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1624 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1627 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1628 struct btrfs_dev_item *s,
1631 BUILD_BUG_ON(sizeof(u64) !=
1632 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1633 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1634 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1638 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1639 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1640 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1641 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1642 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1644 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1645 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1646 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1647 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1648 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1649 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1651 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1652 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1654 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1656 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1658 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1660 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1662 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1663 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1665 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1667 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1669 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1672 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1674 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1677 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1679 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1682 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1683 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1684 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1685 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1686 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1687 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1688 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1689 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1690 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1691 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1692 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1694 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1696 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1699 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1700 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1701 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1703 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1705 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1707 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1709 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1710 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1712 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1714 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1715 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1717 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1720 unsigned long offset = (unsigned long)c;
1721 offset += offsetof(struct btrfs_chunk, stripe);
1722 offset += nr * sizeof(struct btrfs_stripe);
1723 return (struct btrfs_stripe *)offset;
1726 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1728 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1731 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1732 struct btrfs_chunk *c, int nr)
1734 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1737 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1738 struct btrfs_chunk *c, int nr)
1740 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1743 /* struct btrfs_block_group_item */
1744 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1746 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1748 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1749 struct btrfs_block_group_item, chunk_objectid, 64);
1751 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1752 struct btrfs_block_group_item, chunk_objectid, 64);
1753 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1754 struct btrfs_block_group_item, flags, 64);
1755 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1756 struct btrfs_block_group_item, flags, 64);
1758 /* struct btrfs_free_space_info */
1759 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1761 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1763 /* struct btrfs_inode_ref */
1764 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1765 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1767 /* struct btrfs_inode_extref */
1768 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1769 parent_objectid, 64);
1770 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1772 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1774 /* struct btrfs_inode_item */
1775 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1776 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1777 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1778 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1779 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1780 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1781 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1782 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1783 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1784 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1785 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1786 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1787 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1789 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1791 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1793 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1794 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1796 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1798 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1799 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1800 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1801 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1802 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1803 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1804 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1805 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1806 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1807 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1809 /* struct btrfs_dev_extent */
1810 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1812 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1813 chunk_objectid, 64);
1814 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1816 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1818 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1820 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1821 return (unsigned long)dev + ptr;
1824 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1825 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1827 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1829 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1832 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1834 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1835 struct btrfs_tree_block_info *item,
1836 struct btrfs_disk_key *key)
1838 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1841 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1842 struct btrfs_tree_block_info *item,
1843 struct btrfs_disk_key *key)
1845 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1848 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1850 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1852 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1854 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1857 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1860 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1862 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1865 static inline u32 btrfs_extent_inline_ref_size(int type)
1867 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1868 type == BTRFS_SHARED_BLOCK_REF_KEY)
1869 return sizeof(struct btrfs_extent_inline_ref);
1870 if (type == BTRFS_SHARED_DATA_REF_KEY)
1871 return sizeof(struct btrfs_shared_data_ref) +
1872 sizeof(struct btrfs_extent_inline_ref);
1873 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1874 return sizeof(struct btrfs_extent_data_ref) +
1875 offsetof(struct btrfs_extent_inline_ref, offset);
1879 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1880 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1882 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1883 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1885 /* struct btrfs_node */
1886 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1887 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1888 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1890 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1893 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1896 ptr = offsetof(struct btrfs_node, ptrs) +
1897 sizeof(struct btrfs_key_ptr) * nr;
1898 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1901 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1905 ptr = offsetof(struct btrfs_node, ptrs) +
1906 sizeof(struct btrfs_key_ptr) * nr;
1907 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1910 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1913 ptr = offsetof(struct btrfs_node, ptrs) +
1914 sizeof(struct btrfs_key_ptr) * nr;
1915 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1918 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1922 ptr = offsetof(struct btrfs_node, ptrs) +
1923 sizeof(struct btrfs_key_ptr) * nr;
1924 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1927 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1929 return offsetof(struct btrfs_node, ptrs) +
1930 sizeof(struct btrfs_key_ptr) * nr;
1933 void btrfs_node_key(const struct extent_buffer *eb,
1934 struct btrfs_disk_key *disk_key, int nr);
1936 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1937 struct btrfs_disk_key *disk_key, int nr)
1940 ptr = btrfs_node_key_ptr_offset(nr);
1941 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1942 struct btrfs_key_ptr, key, disk_key);
1945 /* struct btrfs_item */
1946 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1947 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1948 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1949 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1951 static inline unsigned long btrfs_item_nr_offset(int nr)
1953 return offsetof(struct btrfs_leaf, items) +
1954 sizeof(struct btrfs_item) * nr;
1957 static inline struct btrfs_item *btrfs_item_nr(int nr)
1959 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1962 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1963 struct btrfs_item *item)
1965 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1968 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1970 return btrfs_item_end(eb, btrfs_item_nr(nr));
1973 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1975 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1978 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1980 return btrfs_item_size(eb, btrfs_item_nr(nr));
1983 static inline void btrfs_item_key(const struct extent_buffer *eb,
1984 struct btrfs_disk_key *disk_key, int nr)
1986 struct btrfs_item *item = btrfs_item_nr(nr);
1987 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1990 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1991 struct btrfs_disk_key *disk_key, int nr)
1993 struct btrfs_item *item = btrfs_item_nr(nr);
1994 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1997 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2000 * struct btrfs_root_ref
2002 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2003 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2004 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2006 /* struct btrfs_dir_item */
2007 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2008 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2009 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2010 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2011 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2012 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2014 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2016 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2019 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
2020 const struct btrfs_dir_item *item,
2021 struct btrfs_disk_key *key)
2023 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2026 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2027 struct btrfs_dir_item *item,
2028 const struct btrfs_disk_key *key)
2030 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2033 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2035 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2037 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2040 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2041 const struct btrfs_free_space_header *h,
2042 struct btrfs_disk_key *key)
2044 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2047 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2048 struct btrfs_free_space_header *h,
2049 const struct btrfs_disk_key *key)
2051 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2054 /* struct btrfs_disk_key */
2055 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2057 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2058 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2060 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2061 const struct btrfs_disk_key *disk)
2063 cpu->offset = le64_to_cpu(disk->offset);
2064 cpu->type = disk->type;
2065 cpu->objectid = le64_to_cpu(disk->objectid);
2068 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2069 const struct btrfs_key *cpu)
2071 disk->offset = cpu_to_le64(cpu->offset);
2072 disk->type = cpu->type;
2073 disk->objectid = cpu_to_le64(cpu->objectid);
2076 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2077 struct btrfs_key *key, int nr)
2079 struct btrfs_disk_key disk_key;
2080 btrfs_node_key(eb, &disk_key, nr);
2081 btrfs_disk_key_to_cpu(key, &disk_key);
2084 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2085 struct btrfs_key *key, int nr)
2087 struct btrfs_disk_key disk_key;
2088 btrfs_item_key(eb, &disk_key, nr);
2089 btrfs_disk_key_to_cpu(key, &disk_key);
2092 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2093 const struct btrfs_dir_item *item,
2094 struct btrfs_key *key)
2096 struct btrfs_disk_key disk_key;
2097 btrfs_dir_item_key(eb, item, &disk_key);
2098 btrfs_disk_key_to_cpu(key, &disk_key);
2101 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2106 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2111 /* struct btrfs_header */
2112 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2113 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2115 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2116 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2117 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2118 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2119 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2121 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2122 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2124 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2126 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2128 return (btrfs_header_flags(eb) & flag) == flag;
2131 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2133 u64 flags = btrfs_header_flags(eb);
2134 btrfs_set_header_flags(eb, flags | flag);
2135 return (flags & flag) == flag;
2138 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2140 u64 flags = btrfs_header_flags(eb);
2141 btrfs_set_header_flags(eb, flags & ~flag);
2142 return (flags & flag) == flag;
2145 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2147 u64 flags = btrfs_header_flags(eb);
2148 return flags >> BTRFS_BACKREF_REV_SHIFT;
2151 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2154 u64 flags = btrfs_header_flags(eb);
2155 flags &= ~BTRFS_BACKREF_REV_MASK;
2156 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2157 btrfs_set_header_flags(eb, flags);
2160 static inline unsigned long btrfs_header_fsid(void)
2162 return offsetof(struct btrfs_header, fsid);
2165 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2167 return offsetof(struct btrfs_header, chunk_tree_uuid);
2170 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2172 return btrfs_header_level(eb) == 0;
2175 /* struct btrfs_root_item */
2176 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2178 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2179 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2180 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2182 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2184 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2185 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2186 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2187 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2188 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2189 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2190 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2191 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2193 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2195 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2197 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2199 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2201 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2204 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2206 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2209 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2211 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2214 /* struct btrfs_root_backup */
2215 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2217 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2219 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2220 tree_root_level, 8);
2222 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2224 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2225 chunk_root_gen, 64);
2226 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2227 chunk_root_level, 8);
2229 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2231 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2232 extent_root_gen, 64);
2233 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2234 extent_root_level, 8);
2236 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2238 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2240 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2243 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2245 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2247 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2250 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2252 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2254 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2255 csum_root_level, 8);
2256 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2258 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2260 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2263 /* struct btrfs_balance_item */
2264 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2266 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2267 const struct btrfs_balance_item *bi,
2268 struct btrfs_disk_balance_args *ba)
2270 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2273 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2274 struct btrfs_balance_item *bi,
2275 const struct btrfs_disk_balance_args *ba)
2277 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2280 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2281 const struct btrfs_balance_item *bi,
2282 struct btrfs_disk_balance_args *ba)
2284 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2287 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2288 struct btrfs_balance_item *bi,
2289 const struct btrfs_disk_balance_args *ba)
2291 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2294 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2295 const struct btrfs_balance_item *bi,
2296 struct btrfs_disk_balance_args *ba)
2298 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2301 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2302 struct btrfs_balance_item *bi,
2303 const struct btrfs_disk_balance_args *ba)
2305 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2309 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2310 const struct btrfs_disk_balance_args *disk)
2312 memset(cpu, 0, sizeof(*cpu));
2314 cpu->profiles = le64_to_cpu(disk->profiles);
2315 cpu->usage = le64_to_cpu(disk->usage);
2316 cpu->devid = le64_to_cpu(disk->devid);
2317 cpu->pstart = le64_to_cpu(disk->pstart);
2318 cpu->pend = le64_to_cpu(disk->pend);
2319 cpu->vstart = le64_to_cpu(disk->vstart);
2320 cpu->vend = le64_to_cpu(disk->vend);
2321 cpu->target = le64_to_cpu(disk->target);
2322 cpu->flags = le64_to_cpu(disk->flags);
2323 cpu->limit = le64_to_cpu(disk->limit);
2324 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2325 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2329 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2330 const struct btrfs_balance_args *cpu)
2332 memset(disk, 0, sizeof(*disk));
2334 disk->profiles = cpu_to_le64(cpu->profiles);
2335 disk->usage = cpu_to_le64(cpu->usage);
2336 disk->devid = cpu_to_le64(cpu->devid);
2337 disk->pstart = cpu_to_le64(cpu->pstart);
2338 disk->pend = cpu_to_le64(cpu->pend);
2339 disk->vstart = cpu_to_le64(cpu->vstart);
2340 disk->vend = cpu_to_le64(cpu->vend);
2341 disk->target = cpu_to_le64(cpu->target);
2342 disk->flags = cpu_to_le64(cpu->flags);
2343 disk->limit = cpu_to_le64(cpu->limit);
2344 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2345 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2348 /* struct btrfs_super_block */
2349 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2350 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2351 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2353 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2354 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2355 struct btrfs_super_block, sys_chunk_array_size, 32);
2356 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2357 struct btrfs_super_block, chunk_root_generation, 64);
2358 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2360 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2362 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2363 chunk_root_level, 8);
2364 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2366 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2367 log_root_transid, 64);
2368 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2370 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2372 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2374 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2376 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2378 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2380 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2381 root_dir_objectid, 64);
2382 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2384 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2386 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2387 compat_ro_flags, 64);
2388 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2389 incompat_flags, 64);
2390 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2392 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2393 cache_generation, 64);
2394 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2395 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2396 uuid_tree_generation, 64);
2398 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2400 u16 t = btrfs_super_csum_type(s);
2402 * csum type is validated at mount time
2404 return btrfs_csum_sizes[t];
2409 * The leaf data grows from end-to-front in the node.
2410 * this returns the address of the start of the last item,
2411 * which is the stop of the leaf data stack
2413 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2414 const struct extent_buffer *leaf)
2416 u32 nr = btrfs_header_nritems(leaf);
2419 return BTRFS_LEAF_DATA_SIZE(fs_info);
2420 return btrfs_item_offset_nr(leaf, nr - 1);
2423 /* struct btrfs_file_extent_item */
2424 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2425 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2426 struct btrfs_file_extent_item, disk_bytenr, 64);
2427 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2428 struct btrfs_file_extent_item, offset, 64);
2429 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2430 struct btrfs_file_extent_item, generation, 64);
2431 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2432 struct btrfs_file_extent_item, num_bytes, 64);
2433 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2434 struct btrfs_file_extent_item, disk_num_bytes, 64);
2435 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2436 struct btrfs_file_extent_item, compression, 8);
2438 static inline unsigned long
2439 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2441 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2444 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2446 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2449 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2451 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2453 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2454 disk_num_bytes, 64);
2455 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2457 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2459 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2461 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2463 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2465 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2466 other_encoding, 16);
2469 * this returns the number of bytes used by the item on disk, minus the
2470 * size of any extent headers. If a file is compressed on disk, this is
2471 * the compressed size
2473 static inline u32 btrfs_file_extent_inline_item_len(
2474 const struct extent_buffer *eb,
2475 struct btrfs_item *e)
2477 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2480 /* btrfs_dev_stats_item */
2481 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2482 const struct btrfs_dev_stats_item *ptr,
2487 read_extent_buffer(eb, &val,
2488 offsetof(struct btrfs_dev_stats_item, values) +
2489 ((unsigned long)ptr) + (index * sizeof(u64)),
2494 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2495 struct btrfs_dev_stats_item *ptr,
2498 write_extent_buffer(eb, &val,
2499 offsetof(struct btrfs_dev_stats_item, values) +
2500 ((unsigned long)ptr) + (index * sizeof(u64)),
2504 /* btrfs_qgroup_status_item */
2505 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2507 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2509 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2511 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2514 /* btrfs_qgroup_info_item */
2515 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2517 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2518 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2520 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2521 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2524 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2525 struct btrfs_qgroup_info_item, generation, 64);
2526 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2528 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2529 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2530 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2532 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2533 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2535 /* btrfs_qgroup_limit_item */
2536 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2538 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2540 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2542 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2544 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2547 /* btrfs_dev_replace_item */
2548 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2549 struct btrfs_dev_replace_item, src_devid, 64);
2550 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2551 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2553 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2555 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2557 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2559 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2560 num_write_errors, 64);
2561 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2562 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2564 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2566 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2569 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2570 struct btrfs_dev_replace_item, src_devid, 64);
2571 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2572 struct btrfs_dev_replace_item,
2573 cont_reading_from_srcdev_mode, 64);
2574 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2575 struct btrfs_dev_replace_item, replace_state, 64);
2576 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2577 struct btrfs_dev_replace_item, time_started, 64);
2578 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2579 struct btrfs_dev_replace_item, time_stopped, 64);
2580 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2581 struct btrfs_dev_replace_item, num_write_errors, 64);
2582 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2583 struct btrfs_dev_replace_item,
2584 num_uncorrectable_read_errors, 64);
2585 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2586 struct btrfs_dev_replace_item, cursor_left, 64);
2587 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2588 struct btrfs_dev_replace_item, cursor_right, 64);
2590 /* helper function to cast into the data area of the leaf. */
2591 #define btrfs_item_ptr(leaf, slot, type) \
2592 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2593 btrfs_item_offset_nr(leaf, slot)))
2595 #define btrfs_item_ptr_offset(leaf, slot) \
2596 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2597 btrfs_item_offset_nr(leaf, slot)))
2599 static inline u64 btrfs_name_hash(const char *name, int len)
2601 return crc32c((u32)~1, name, len);
2605 * Figure the key offset of an extended inode ref
2607 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2610 return (u64) crc32c(parent_objectid, name, len);
2613 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2615 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2616 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2619 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2621 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2626 enum btrfs_inline_ref_type {
2627 BTRFS_REF_TYPE_INVALID,
2628 BTRFS_REF_TYPE_BLOCK,
2629 BTRFS_REF_TYPE_DATA,
2633 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2634 struct btrfs_extent_inline_ref *iref,
2635 enum btrfs_inline_ref_type is_data);
2637 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2639 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2642 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2646 * Doing a truncate won't result in new nodes or leaves, just what we need for
2649 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2652 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2655 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans);
2656 bool btrfs_check_space_for_delayed_refs(struct btrfs_fs_info *fs_info);
2657 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2659 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2660 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2661 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2662 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2663 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2664 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2665 unsigned long count);
2666 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2667 unsigned long count, u64 transid, int wait);
2668 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2669 struct btrfs_delayed_ref_root *delayed_refs,
2670 struct btrfs_delayed_ref_head *head);
2671 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2672 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2673 struct btrfs_fs_info *fs_info, u64 bytenr,
2674 u64 offset, int metadata, u64 *refs, u64 *flags);
2675 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2676 u64 bytenr, u64 num, int reserved);
2677 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2678 u64 bytenr, u64 num_bytes);
2679 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2680 struct extent_buffer *eb);
2681 int btrfs_cross_ref_exist(struct btrfs_root *root,
2682 u64 objectid, u64 offset, u64 bytenr);
2683 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2684 struct btrfs_fs_info *info,
2686 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2687 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2688 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2689 struct btrfs_root *root,
2690 u64 parent, u64 root_objectid,
2691 const struct btrfs_disk_key *key,
2692 int level, u64 hint,
2694 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2695 struct btrfs_root *root,
2696 struct extent_buffer *buf,
2697 u64 parent, int last_ref);
2698 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2699 struct btrfs_root *root, u64 owner,
2700 u64 offset, u64 ram_bytes,
2701 struct btrfs_key *ins);
2702 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2703 u64 root_objectid, u64 owner, u64 offset,
2704 struct btrfs_key *ins);
2705 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2706 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2707 struct btrfs_key *ins, int is_data, int delalloc);
2708 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2709 struct extent_buffer *buf, int full_backref);
2710 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2711 struct extent_buffer *buf, int full_backref);
2712 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2713 struct btrfs_fs_info *fs_info,
2714 u64 bytenr, u64 num_bytes, u64 flags,
2715 int level, int is_data);
2716 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2717 struct btrfs_root *root,
2718 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2719 u64 owner, u64 offset);
2721 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2722 u64 start, u64 len, int delalloc);
2723 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2724 u64 start, u64 len);
2725 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2726 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2727 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2728 struct btrfs_root *root,
2729 u64 bytenr, u64 num_bytes, u64 parent,
2730 u64 root_objectid, u64 owner, u64 offset);
2732 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2733 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2734 struct btrfs_fs_info *fs_info);
2735 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2736 struct btrfs_fs_info *fs_info);
2737 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2738 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2739 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2740 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2741 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2742 u64 bytes_used, u64 type, u64 chunk_offset,
2744 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2745 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2746 struct btrfs_fs_info *fs_info,
2747 const u64 chunk_offset);
2748 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2749 u64 group_start, struct extent_map *em);
2750 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2751 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2752 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2753 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2754 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2755 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2756 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2757 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2759 enum btrfs_reserve_flush_enum {
2760 /* If we are in the transaction, we can't flush anything.*/
2761 BTRFS_RESERVE_NO_FLUSH,
2763 * Flushing delalloc may cause deadlock somewhere, in this
2764 * case, use FLUSH LIMIT
2766 BTRFS_RESERVE_FLUSH_LIMIT,
2767 BTRFS_RESERVE_FLUSH_ALL,
2770 enum btrfs_flush_state {
2771 FLUSH_DELAYED_ITEMS_NR = 1,
2772 FLUSH_DELAYED_ITEMS = 2,
2773 FLUSH_DELAYED_REFS_NR = 3,
2774 FLUSH_DELAYED_REFS = 4,
2776 FLUSH_DELALLOC_WAIT = 6,
2781 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2782 int btrfs_check_data_free_space(struct inode *inode,
2783 struct extent_changeset **reserved, u64 start, u64 len);
2784 void btrfs_free_reserved_data_space(struct inode *inode,
2785 struct extent_changeset *reserved, u64 start, u64 len);
2786 void btrfs_delalloc_release_space(struct inode *inode,
2787 struct extent_changeset *reserved,
2788 u64 start, u64 len, bool qgroup_free);
2789 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2791 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2792 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2793 struct btrfs_block_rsv *rsv,
2794 int nitems, bool use_global_rsv);
2795 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2796 struct btrfs_block_rsv *rsv);
2797 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2800 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2801 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2803 int btrfs_delalloc_reserve_space(struct inode *inode,
2804 struct extent_changeset **reserved, u64 start, u64 len);
2805 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2806 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2807 unsigned short type);
2808 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2809 struct btrfs_block_rsv *rsv,
2810 unsigned short type);
2811 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2812 struct btrfs_block_rsv *rsv);
2813 int btrfs_block_rsv_add(struct btrfs_root *root,
2814 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2815 enum btrfs_reserve_flush_enum flush);
2816 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2817 int btrfs_block_rsv_refill(struct btrfs_root *root,
2818 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2819 enum btrfs_reserve_flush_enum flush);
2820 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2821 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2823 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2824 struct btrfs_block_rsv *dest, u64 num_bytes,
2826 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2827 struct btrfs_block_rsv *block_rsv,
2829 void btrfs_delayed_refs_rsv_release(struct btrfs_fs_info *fs_info, int nr);
2830 void btrfs_update_delayed_refs_rsv(struct btrfs_trans_handle *trans);
2831 int btrfs_delayed_refs_rsv_refill(struct btrfs_fs_info *fs_info,
2832 enum btrfs_reserve_flush_enum flush);
2833 void btrfs_migrate_to_delayed_refs_rsv(struct btrfs_fs_info *fs_info,
2834 struct btrfs_block_rsv *src,
2836 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2837 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2838 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2839 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2840 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2841 u64 start, u64 end);
2842 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2843 u64 num_bytes, u64 *actual_bytes);
2844 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2845 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2847 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2848 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2849 struct btrfs_fs_info *fs_info);
2850 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2851 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2852 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2853 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2854 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2855 u64 start, u64 end);
2856 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2859 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2860 int level, int *slot);
2861 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2862 int btrfs_previous_item(struct btrfs_root *root,
2863 struct btrfs_path *path, u64 min_objectid,
2865 int btrfs_previous_extent_item(struct btrfs_root *root,
2866 struct btrfs_path *path, u64 min_objectid);
2867 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2868 struct btrfs_path *path,
2869 const struct btrfs_key *new_key);
2870 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2871 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2872 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2873 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2874 struct btrfs_key *key, int lowest_level,
2876 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2877 struct btrfs_path *path,
2879 enum btrfs_compare_tree_result {
2880 BTRFS_COMPARE_TREE_NEW,
2881 BTRFS_COMPARE_TREE_DELETED,
2882 BTRFS_COMPARE_TREE_CHANGED,
2883 BTRFS_COMPARE_TREE_SAME,
2885 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2886 struct btrfs_path *right_path,
2887 struct btrfs_key *key,
2888 enum btrfs_compare_tree_result result,
2890 int btrfs_compare_trees(struct btrfs_root *left_root,
2891 struct btrfs_root *right_root,
2892 btrfs_changed_cb_t cb, void *ctx);
2893 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2894 struct btrfs_root *root, struct extent_buffer *buf,
2895 struct extent_buffer *parent, int parent_slot,
2896 struct extent_buffer **cow_ret);
2897 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2898 struct btrfs_root *root,
2899 struct extent_buffer *buf,
2900 struct extent_buffer **cow_ret, u64 new_root_objectid);
2901 int btrfs_block_can_be_shared(struct btrfs_root *root,
2902 struct extent_buffer *buf);
2903 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2905 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2906 struct btrfs_path *path, u32 new_size, int from_end);
2907 int btrfs_split_item(struct btrfs_trans_handle *trans,
2908 struct btrfs_root *root,
2909 struct btrfs_path *path,
2910 const struct btrfs_key *new_key,
2911 unsigned long split_offset);
2912 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2913 struct btrfs_root *root,
2914 struct btrfs_path *path,
2915 const struct btrfs_key *new_key);
2916 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2917 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2918 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2919 const struct btrfs_key *key, struct btrfs_path *p,
2920 int ins_len, int cow);
2921 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2922 struct btrfs_path *p, u64 time_seq);
2923 int btrfs_search_slot_for_read(struct btrfs_root *root,
2924 const struct btrfs_key *key,
2925 struct btrfs_path *p, int find_higher,
2927 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2928 struct btrfs_root *root, struct extent_buffer *parent,
2929 int start_slot, u64 *last_ret,
2930 struct btrfs_key *progress);
2931 void btrfs_release_path(struct btrfs_path *p);
2932 struct btrfs_path *btrfs_alloc_path(void);
2933 void btrfs_free_path(struct btrfs_path *p);
2934 void btrfs_set_path_blocking(struct btrfs_path *p);
2935 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2937 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2938 struct btrfs_path *path, int slot, int nr);
2939 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2940 struct btrfs_root *root,
2941 struct btrfs_path *path)
2943 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2946 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2947 const struct btrfs_key *cpu_key, u32 *data_size,
2948 u32 total_data, u32 total_size, int nr);
2949 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2950 const struct btrfs_key *key, void *data, u32 data_size);
2951 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2952 struct btrfs_root *root,
2953 struct btrfs_path *path,
2954 const struct btrfs_key *cpu_key, u32 *data_size,
2957 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2958 struct btrfs_root *root,
2959 struct btrfs_path *path,
2960 const struct btrfs_key *key,
2963 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2966 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2967 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2968 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2970 static inline int btrfs_next_old_item(struct btrfs_root *root,
2971 struct btrfs_path *p, u64 time_seq)
2974 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2975 return btrfs_next_old_leaf(root, p, time_seq);
2978 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2980 return btrfs_next_old_item(root, p, 0);
2982 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2983 struct extent_buffer *leaf);
2984 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2985 struct btrfs_block_rsv *block_rsv,
2986 int update_ref, int for_reloc);
2987 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2988 struct btrfs_root *root,
2989 struct extent_buffer *node,
2990 struct extent_buffer *parent);
2991 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2994 * Do it this way so we only ever do one test_bit in the normal case.
2996 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2997 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
3005 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3006 * anything except sleeping. This function is used to check the status of
3009 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
3011 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
3014 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3016 kfree(fs_info->balance_ctl);
3017 kfree(fs_info->delayed_root);
3018 kfree(fs_info->extent_root);
3019 kfree(fs_info->tree_root);
3020 kfree(fs_info->chunk_root);
3021 kfree(fs_info->dev_root);
3022 kfree(fs_info->csum_root);
3023 kfree(fs_info->quota_root);
3024 kfree(fs_info->uuid_root);
3025 kfree(fs_info->free_space_root);
3026 kfree(fs_info->super_copy);
3027 kfree(fs_info->super_for_commit);
3031 /* tree mod log functions from ctree.c */
3032 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3033 struct seq_list *elem);
3034 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3035 struct seq_list *elem);
3036 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3039 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3040 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3042 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3043 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3045 int btrfs_del_root(struct btrfs_trans_handle *trans,
3046 const struct btrfs_key *key);
3047 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3048 const struct btrfs_key *key,
3049 struct btrfs_root_item *item);
3050 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3051 struct btrfs_root *root,
3052 struct btrfs_key *key,
3053 struct btrfs_root_item *item);
3054 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3055 struct btrfs_path *path, struct btrfs_root_item *root_item,
3056 struct btrfs_key *root_key);
3057 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3058 void btrfs_set_root_node(struct btrfs_root_item *item,
3059 struct extent_buffer *node);
3060 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3061 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3062 struct btrfs_root *root);
3065 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3067 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3069 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3070 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3074 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3075 const char *name, int name_len);
3076 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3077 int name_len, struct btrfs_inode *dir,
3078 struct btrfs_key *location, u8 type, u64 index);
3079 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3080 struct btrfs_root *root,
3081 struct btrfs_path *path, u64 dir,
3082 const char *name, int name_len,
3084 struct btrfs_dir_item *
3085 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3086 struct btrfs_root *root,
3087 struct btrfs_path *path, u64 dir,
3088 u64 objectid, const char *name, int name_len,
3090 struct btrfs_dir_item *
3091 btrfs_search_dir_index_item(struct btrfs_root *root,
3092 struct btrfs_path *path, u64 dirid,
3093 const char *name, int name_len);
3094 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3095 struct btrfs_root *root,
3096 struct btrfs_path *path,
3097 struct btrfs_dir_item *di);
3098 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3099 struct btrfs_root *root,
3100 struct btrfs_path *path, u64 objectid,
3101 const char *name, u16 name_len,
3102 const void *data, u16 data_len);
3103 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3104 struct btrfs_root *root,
3105 struct btrfs_path *path, u64 dir,
3106 const char *name, u16 name_len,
3108 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3109 struct btrfs_path *path,
3114 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3115 struct btrfs_root *root, u64 offset);
3116 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3117 struct btrfs_root *root, u64 offset);
3118 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3121 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3122 struct btrfs_root *root,
3123 const char *name, int name_len,
3124 u64 inode_objectid, u64 ref_objectid, u64 index);
3125 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3126 struct btrfs_root *root,
3127 const char *name, int name_len,
3128 u64 inode_objectid, u64 ref_objectid, u64 *index);
3129 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3130 struct btrfs_root *root,
3131 struct btrfs_path *path, u64 objectid);
3132 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3133 *root, struct btrfs_path *path,
3134 struct btrfs_key *location, int mod);
3136 struct btrfs_inode_extref *
3137 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3138 struct btrfs_root *root,
3139 struct btrfs_path *path,
3140 const char *name, int name_len,
3141 u64 inode_objectid, u64 ref_objectid, int ins_len,
3144 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3146 int name_len, struct btrfs_inode_ref **ref_ret);
3147 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3148 u64 ref_objectid, const char *name,
3150 struct btrfs_inode_extref **extref_ret);
3153 struct btrfs_dio_private;
3154 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3155 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3156 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3157 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3158 u64 logical_offset);
3159 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3160 struct btrfs_root *root,
3161 u64 objectid, u64 pos,
3162 u64 disk_offset, u64 disk_num_bytes,
3163 u64 num_bytes, u64 offset, u64 ram_bytes,
3164 u8 compression, u8 encryption, u16 other_encoding);
3165 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3166 struct btrfs_root *root,
3167 struct btrfs_path *path, u64 objectid,
3168 u64 bytenr, int mod);
3169 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3170 struct btrfs_root *root,
3171 struct btrfs_ordered_sum *sums);
3172 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3173 u64 file_start, int contig);
3174 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3175 struct list_head *list, int search_commit);
3176 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3177 const struct btrfs_path *path,
3178 struct btrfs_file_extent_item *fi,
3179 const bool new_inline,
3180 struct extent_map *em);
3183 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3184 struct page *page, size_t pg_offset, u64 start,
3185 u64 len, int create);
3186 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3187 u64 *orig_start, u64 *orig_block_len,
3190 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3191 struct btrfs_inode *inode);
3192 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3193 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3194 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3195 struct btrfs_root *root,
3196 struct btrfs_inode *dir, struct btrfs_inode *inode,
3197 const char *name, int name_len);
3198 int btrfs_add_link(struct btrfs_trans_handle *trans,
3199 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3200 const char *name, int name_len, int add_backref, u64 index);
3201 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3202 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3204 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3205 struct btrfs_root *root,
3206 struct inode *inode, u64 new_size,
3209 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3210 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3211 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3212 unsigned int extra_bits,
3213 struct extent_state **cached_state, int dedupe);
3214 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3215 struct btrfs_root *new_root,
3216 struct btrfs_root *parent_root,
3218 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3220 void btrfs_clear_delalloc_extent(struct inode *inode,
3221 struct extent_state *state, unsigned *bits);
3222 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3223 struct extent_state *other);
3224 void btrfs_split_delalloc_extent(struct inode *inode,
3225 struct extent_state *orig, u64 split);
3226 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3227 unsigned long bio_flags);
3228 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3229 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3230 int btrfs_readpage(struct file *file, struct page *page);
3231 void btrfs_evict_inode(struct inode *inode);
3232 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3233 struct inode *btrfs_alloc_inode(struct super_block *sb);
3234 void btrfs_destroy_inode(struct inode *inode);
3235 int btrfs_drop_inode(struct inode *inode);
3236 int __init btrfs_init_cachep(void);
3237 void __cold btrfs_destroy_cachep(void);
3238 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3239 struct btrfs_root *root, int *new,
3240 struct btrfs_path *path);
3241 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3242 struct btrfs_root *root, int *was_new);
3243 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3244 struct page *page, size_t pg_offset,
3245 u64 start, u64 end, int create);
3246 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3247 struct btrfs_root *root,
3248 struct inode *inode);
3249 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3250 struct btrfs_root *root, struct inode *inode);
3251 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3252 struct btrfs_inode *inode);
3253 int btrfs_orphan_cleanup(struct btrfs_root *root);
3254 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3255 void btrfs_add_delayed_iput(struct inode *inode);
3256 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3257 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3258 u64 start, u64 num_bytes, u64 min_size,
3259 loff_t actual_len, u64 *alloc_hint);
3260 int btrfs_prealloc_file_range_trans(struct inode *inode,
3261 struct btrfs_trans_handle *trans, int mode,
3262 u64 start, u64 num_bytes, u64 min_size,
3263 loff_t actual_len, u64 *alloc_hint);
3264 int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
3265 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3266 struct writeback_control *wbc);
3267 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3268 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3269 u64 end, int uptodate);
3270 extern const struct dentry_operations btrfs_dentry_operations;
3273 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3274 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3275 int btrfs_ioctl_get_supported_features(void __user *arg);
3276 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3277 int btrfs_is_empty_uuid(u8 *uuid);
3278 int btrfs_defrag_file(struct inode *inode, struct file *file,
3279 struct btrfs_ioctl_defrag_range_args *range,
3280 u64 newer_than, unsigned long max_pages);
3281 void btrfs_get_block_group_info(struct list_head *groups_list,
3282 struct btrfs_ioctl_space_info *space);
3283 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3284 struct btrfs_ioctl_balance_args *bargs);
3287 int __init btrfs_auto_defrag_init(void);
3288 void __cold btrfs_auto_defrag_exit(void);
3289 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3290 struct btrfs_inode *inode);
3291 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3292 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3293 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3294 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3296 extern const struct file_operations btrfs_file_operations;
3297 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3298 struct btrfs_root *root, struct inode *inode,
3299 struct btrfs_path *path, u64 start, u64 end,
3300 u64 *drop_end, int drop_cache,
3302 u32 extent_item_size,
3304 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3305 struct btrfs_root *root, struct inode *inode, u64 start,
3306 u64 end, int drop_cache);
3307 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3308 struct btrfs_inode *inode, u64 start, u64 end);
3309 int btrfs_release_file(struct inode *inode, struct file *file);
3310 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3311 size_t num_pages, loff_t pos, size_t write_bytes,
3312 struct extent_state **cached);
3313 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3314 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
3315 struct file *file_out, loff_t pos_out,
3316 loff_t len, unsigned int remap_flags);
3319 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3320 struct btrfs_root *root);
3323 int __init btrfs_init_sysfs(void);
3324 void __cold btrfs_exit_sysfs(void);
3325 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3326 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3329 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3330 unsigned long new_flags);
3331 int btrfs_sync_fs(struct super_block *sb, int wait);
3333 static inline __printf(2, 3) __cold
3334 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3338 #ifdef CONFIG_PRINTK
3341 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3343 #define btrfs_printk(fs_info, fmt, args...) \
3344 btrfs_no_printk(fs_info, fmt, ##args)
3347 #define btrfs_emerg(fs_info, fmt, args...) \
3348 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3349 #define btrfs_alert(fs_info, fmt, args...) \
3350 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3351 #define btrfs_crit(fs_info, fmt, args...) \
3352 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3353 #define btrfs_err(fs_info, fmt, args...) \
3354 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3355 #define btrfs_warn(fs_info, fmt, args...) \
3356 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3357 #define btrfs_notice(fs_info, fmt, args...) \
3358 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3359 #define btrfs_info(fs_info, fmt, args...) \
3360 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3363 * Wrappers that use printk_in_rcu
3365 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3366 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3367 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3368 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3369 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3370 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3371 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3372 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3373 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3374 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3375 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3376 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3377 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3378 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3381 * Wrappers that use a ratelimited printk_in_rcu
3383 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3384 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3385 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3386 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3387 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3388 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3389 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3390 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3391 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3392 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3393 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3394 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3395 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3396 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3399 * Wrappers that use a ratelimited printk
3401 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3402 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3403 #define btrfs_alert_rl(fs_info, fmt, args...) \
3404 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3405 #define btrfs_crit_rl(fs_info, fmt, args...) \
3406 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3407 #define btrfs_err_rl(fs_info, fmt, args...) \
3408 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3409 #define btrfs_warn_rl(fs_info, fmt, args...) \
3410 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3411 #define btrfs_notice_rl(fs_info, fmt, args...) \
3412 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3413 #define btrfs_info_rl(fs_info, fmt, args...) \
3414 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3416 #if defined(CONFIG_DYNAMIC_DEBUG)
3417 #define btrfs_debug(fs_info, fmt, args...) \
3419 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3420 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3421 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3423 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3425 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3426 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3427 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3429 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3431 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3432 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3433 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3436 #define btrfs_debug_rl(fs_info, fmt, args...) \
3438 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3439 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3440 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3443 #elif defined(DEBUG)
3444 #define btrfs_debug(fs_info, fmt, args...) \
3445 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3446 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3447 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3448 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3449 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3450 #define btrfs_debug_rl(fs_info, fmt, args...) \
3451 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3453 #define btrfs_debug(fs_info, fmt, args...) \
3454 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3455 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3456 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3457 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3458 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3459 #define btrfs_debug_rl(fs_info, fmt, args...) \
3460 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3463 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3466 btrfs_printk(fs_info, fmt, ##args); \
3467 rcu_read_unlock(); \
3470 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3473 btrfs_no_printk(fs_info, fmt, ##args); \
3474 rcu_read_unlock(); \
3477 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3479 static DEFINE_RATELIMIT_STATE(_rs, \
3480 DEFAULT_RATELIMIT_INTERVAL, \
3481 DEFAULT_RATELIMIT_BURST); \
3482 if (__ratelimit(&_rs)) \
3483 btrfs_printk(fs_info, fmt, ##args); \
3486 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3489 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3490 rcu_read_unlock(); \
3493 #ifdef CONFIG_BTRFS_ASSERT
3496 static inline void assfail(const char *expr, const char *file, int line)
3498 pr_err("assertion failed: %s, file: %s, line: %d\n",
3503 #define ASSERT(expr) \
3504 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3506 #define ASSERT(expr) ((void)0)
3510 * Use that for functions that are conditionally exported for sanity tests but
3513 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3514 #define EXPORT_FOR_TESTS static
3516 #define EXPORT_FOR_TESTS
3520 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3523 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3528 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3529 unsigned int line, int errno, const char *fmt, ...);
3531 const char *btrfs_decode_error(int errno);
3534 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3535 const char *function,
3536 unsigned int line, int errno);
3539 * Call btrfs_abort_transaction as early as possible when an error condition is
3540 * detected, that way the exact line number is reported.
3542 #define btrfs_abort_transaction(trans, errno) \
3544 /* Report first abort since mount */ \
3545 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3546 &((trans)->fs_info->fs_state))) { \
3547 if ((errno) != -EIO) { \
3548 WARN(1, KERN_DEBUG \
3549 "BTRFS: Transaction aborted (error %d)\n", \
3552 btrfs_debug((trans)->fs_info, \
3553 "Transaction aborted (error %d)", \
3557 __btrfs_abort_transaction((trans), __func__, \
3558 __LINE__, (errno)); \
3561 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3563 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3564 (errno), fmt, ##args); \
3569 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3570 unsigned int line, int errno, const char *fmt, ...);
3572 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3573 * will panic(). Otherwise we BUG() here.
3575 #define btrfs_panic(fs_info, errno, fmt, args...) \
3577 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3582 /* compatibility and incompatibility defines */
3584 #define btrfs_set_fs_incompat(__fs_info, opt) \
3585 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3587 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3590 struct btrfs_super_block *disk_super;
3593 disk_super = fs_info->super_copy;
3594 features = btrfs_super_incompat_flags(disk_super);
3595 if (!(features & flag)) {
3596 spin_lock(&fs_info->super_lock);
3597 features = btrfs_super_incompat_flags(disk_super);
3598 if (!(features & flag)) {
3600 btrfs_set_super_incompat_flags(disk_super, features);
3601 btrfs_info(fs_info, "setting %llu feature flag",
3604 spin_unlock(&fs_info->super_lock);
3608 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3609 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3611 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3614 struct btrfs_super_block *disk_super;
3617 disk_super = fs_info->super_copy;
3618 features = btrfs_super_incompat_flags(disk_super);
3619 if (features & flag) {
3620 spin_lock(&fs_info->super_lock);
3621 features = btrfs_super_incompat_flags(disk_super);
3622 if (features & flag) {
3624 btrfs_set_super_incompat_flags(disk_super, features);
3625 btrfs_info(fs_info, "clearing %llu feature flag",
3628 spin_unlock(&fs_info->super_lock);
3632 #define btrfs_fs_incompat(fs_info, opt) \
3633 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3635 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3637 struct btrfs_super_block *disk_super;
3638 disk_super = fs_info->super_copy;
3639 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3642 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3643 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3645 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3648 struct btrfs_super_block *disk_super;
3651 disk_super = fs_info->super_copy;
3652 features = btrfs_super_compat_ro_flags(disk_super);
3653 if (!(features & flag)) {
3654 spin_lock(&fs_info->super_lock);
3655 features = btrfs_super_compat_ro_flags(disk_super);
3656 if (!(features & flag)) {
3658 btrfs_set_super_compat_ro_flags(disk_super, features);
3659 btrfs_info(fs_info, "setting %llu ro feature flag",
3662 spin_unlock(&fs_info->super_lock);
3666 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3667 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3669 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3672 struct btrfs_super_block *disk_super;
3675 disk_super = fs_info->super_copy;
3676 features = btrfs_super_compat_ro_flags(disk_super);
3677 if (features & flag) {
3678 spin_lock(&fs_info->super_lock);
3679 features = btrfs_super_compat_ro_flags(disk_super);
3680 if (features & flag) {
3682 btrfs_set_super_compat_ro_flags(disk_super, features);
3683 btrfs_info(fs_info, "clearing %llu ro feature flag",
3686 spin_unlock(&fs_info->super_lock);
3690 #define btrfs_fs_compat_ro(fs_info, opt) \
3691 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3693 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3695 struct btrfs_super_block *disk_super;
3696 disk_super = fs_info->super_copy;
3697 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3701 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3702 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3703 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3704 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3705 struct inode *inode, struct inode *dir);
3707 #define btrfs_get_acl NULL
3708 #define btrfs_set_acl NULL
3709 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3710 struct inode *inode, struct inode *dir)
3717 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3718 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3719 struct btrfs_root *root);
3720 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3721 struct btrfs_root *root);
3722 int btrfs_recover_relocation(struct btrfs_root *root);
3723 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3724 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3725 struct btrfs_root *root, struct extent_buffer *buf,
3726 struct extent_buffer *cow);
3727 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3728 u64 *bytes_to_reserve);
3729 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3730 struct btrfs_pending_snapshot *pending);
3733 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3734 u64 end, struct btrfs_scrub_progress *progress,
3735 int readonly, int is_dev_replace);
3736 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3737 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3738 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3739 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3740 struct btrfs_device *dev);
3741 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3742 struct btrfs_scrub_progress *progress);
3743 static inline void btrfs_init_full_stripe_locks_tree(
3744 struct btrfs_full_stripe_locks_tree *locks_root)
3746 locks_root->root = RB_ROOT;
3747 mutex_init(&locks_root->lock);
3751 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3752 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3753 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3755 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3757 btrfs_bio_counter_sub(fs_info, 1);
3761 struct reada_control {
3762 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3763 struct btrfs_key key_start;
3764 struct btrfs_key key_end; /* exclusive */
3767 wait_queue_head_t wait;
3769 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3770 struct btrfs_key *start, struct btrfs_key *end);
3771 int btrfs_reada_wait(void *handle);
3772 void btrfs_reada_detach(void *handle);
3773 int btree_readahead_hook(struct extent_buffer *eb, int err);
3775 static inline int is_fstree(u64 rootid)
3777 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3778 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3779 !btrfs_qgroup_level(rootid)))
3784 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3786 return signal_pending(current);
3789 /* Sanity test specific functions */
3790 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3791 void btrfs_test_inode_set_ops(struct inode *inode);
3792 void btrfs_test_destroy_inode(struct inode *inode);
3794 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3796 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3799 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3805 static inline void cond_wake_up(struct wait_queue_head *wq)
3808 * This implies a full smp_mb barrier, see comments for
3809 * waitqueue_active why.
3811 if (wq_has_sleeper(wq))
3815 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3818 * Special case for conditional wakeup where the barrier required for
3819 * waitqueue_active is implied by some of the preceding code. Eg. one
3820 * of such atomic operations (atomic_dec_and_return, ...), or a
3821 * unlock/lock sequence, etc.
3823 if (waitqueue_active(wq))