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;
46 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
48 #define BTRFS_MAX_MIRRORS 3
50 #define BTRFS_MAX_LEVEL 8
52 #define BTRFS_OLDEST_GENERATION 0ULL
55 * the max metadata block size. This limit is somewhat artificial,
56 * but the memmove costs go through the roof for larger blocks.
58 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
61 * we can actually store much bigger names, but lets not confuse the rest
64 #define BTRFS_NAME_LEN 255
67 * Theoretical limit is larger, but we keep this down to a sane
68 * value. That should limit greatly the possibility of collisions on
71 #define BTRFS_LINK_MAX 65535U
73 /* four bytes for CRC32 */
74 static const int btrfs_csum_sizes[] = { 4 };
76 #define BTRFS_EMPTY_DIR_SIZE 0
78 /* ioprio of readahead is set to idle */
79 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
81 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
84 * Use large batch size to reduce overhead of metadata updates. On the reader
85 * side, we only read it when we are close to ENOSPC and the read overhead is
86 * mostly related to the number of CPUs, so it is OK to use arbitrary large
89 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
91 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
95 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
97 static inline u32 count_max_extents(u64 size)
99 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
102 struct btrfs_mapping_tree {
103 struct extent_map_tree map_tree;
106 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
108 BUG_ON(num_stripes == 0);
109 return sizeof(struct btrfs_chunk) +
110 sizeof(struct btrfs_stripe) * (num_stripes - 1);
114 * Runtime (in-memory) states of filesystem
117 /* Global indicator of serious filesystem errors */
118 BTRFS_FS_STATE_ERROR,
120 * Filesystem is being remounted, allow to skip some operations, like
123 BTRFS_FS_STATE_REMOUNTING,
124 /* Track if a transaction abort has been reported on this filesystem */
125 BTRFS_FS_STATE_TRANS_ABORTED,
127 * Bio operations should be blocked on this filesystem because a source
128 * or target device is being destroyed as part of a device replace
130 BTRFS_FS_STATE_DEV_REPLACING,
131 /* The btrfs_fs_info created for self-tests */
132 BTRFS_FS_STATE_DUMMY_FS_INFO,
135 #define BTRFS_BACKREF_REV_MAX 256
136 #define BTRFS_BACKREF_REV_SHIFT 56
137 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
138 BTRFS_BACKREF_REV_SHIFT)
140 #define BTRFS_OLD_BACKREF_REV 0
141 #define BTRFS_MIXED_BACKREF_REV 1
144 * every tree block (leaf or node) starts with this header.
146 struct btrfs_header {
147 /* these first four must match the super block */
148 u8 csum[BTRFS_CSUM_SIZE];
149 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
150 __le64 bytenr; /* which block this node is supposed to live in */
153 /* allowed to be different from the super from here on down */
154 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
159 } __attribute__ ((__packed__));
162 * this is a very generous portion of the super block, giving us
163 * room to translate 14 chunks with 3 stripes each.
165 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
168 * just in case we somehow lose the roots and are not able to mount,
169 * we store an array of the roots from previous transactions
172 #define BTRFS_NUM_BACKUP_ROOTS 4
173 struct btrfs_root_backup {
175 __le64 tree_root_gen;
178 __le64 chunk_root_gen;
181 __le64 extent_root_gen;
190 __le64 csum_root_gen;
200 u8 extent_root_level;
204 /* future and to align */
206 } __attribute__ ((__packed__));
209 * the super block basically lists the main trees of the FS
210 * it currently lacks any block count etc etc
212 struct btrfs_super_block {
213 /* the first 4 fields must match struct btrfs_header */
214 u8 csum[BTRFS_CSUM_SIZE];
215 /* FS specific UUID, visible to user */
216 u8 fsid[BTRFS_FSID_SIZE];
217 __le64 bytenr; /* this block number */
220 /* allowed to be different from the btrfs_header from here own down */
227 /* this will help find the new super based on the log root */
228 __le64 log_root_transid;
231 __le64 root_dir_objectid;
235 __le32 __unused_leafsize;
237 __le32 sys_chunk_array_size;
238 __le64 chunk_root_generation;
240 __le64 compat_ro_flags;
241 __le64 incompat_flags;
246 struct btrfs_dev_item dev_item;
248 char label[BTRFS_LABEL_SIZE];
250 __le64 cache_generation;
251 __le64 uuid_tree_generation;
253 /* the UUID written into btree blocks */
254 u8 metadata_uuid[BTRFS_FSID_SIZE];
256 /* future expansion */
258 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
259 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
260 } __attribute__ ((__packed__));
263 * Compat flags that we support. If any incompat flags are set other than the
264 * ones specified below then we will fail to mount
266 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
267 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
268 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
270 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
271 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
272 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
274 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
275 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
277 #define BTRFS_FEATURE_INCOMPAT_SUPP \
278 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
279 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
280 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
281 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
282 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
283 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
284 BTRFS_FEATURE_INCOMPAT_RAID56 | \
285 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
286 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
287 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
288 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
290 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
291 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
292 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
295 * A leaf is full of items. offset and size tell us where to find
296 * the item in the leaf (relative to the start of the data area)
299 struct btrfs_disk_key key;
302 } __attribute__ ((__packed__));
305 * leaves have an item area and a data area:
306 * [item0, item1....itemN] [free space] [dataN...data1, data0]
308 * The data is separate from the items to get the keys closer together
312 struct btrfs_header header;
313 struct btrfs_item items[];
314 } __attribute__ ((__packed__));
317 * all non-leaf blocks are nodes, they hold only keys and pointers to
320 struct btrfs_key_ptr {
321 struct btrfs_disk_key key;
324 } __attribute__ ((__packed__));
327 struct btrfs_header header;
328 struct btrfs_key_ptr ptrs[];
329 } __attribute__ ((__packed__));
332 * btrfs_paths remember the path taken from the root down to the leaf.
333 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
334 * to any other levels that are present.
336 * The slots array records the index of the item or block pointer
337 * used while walking the tree.
339 enum { READA_NONE, READA_BACK, READA_FORWARD };
341 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
342 int slots[BTRFS_MAX_LEVEL];
343 /* if there is real range locking, this locks field will change */
344 u8 locks[BTRFS_MAX_LEVEL];
346 /* keep some upper locks as we walk down */
350 * set by btrfs_split_item, tells search_slot to keep all locks
351 * and to force calls to keep space in the nodes
353 unsigned int search_for_split:1;
354 unsigned int keep_locks:1;
355 unsigned int skip_locking:1;
356 unsigned int leave_spinning:1;
357 unsigned int search_commit_root:1;
358 unsigned int need_commit_sem:1;
359 unsigned int skip_release_on_error:1;
361 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
362 sizeof(struct btrfs_item))
363 struct btrfs_dev_replace {
364 u64 replace_state; /* see #define above */
365 time64_t time_started; /* seconds since 1-Jan-1970 */
366 time64_t time_stopped; /* seconds since 1-Jan-1970 */
367 atomic64_t num_write_errors;
368 atomic64_t num_uncorrectable_read_errors;
371 u64 committed_cursor_left;
372 u64 cursor_left_last_write_of_item;
375 u64 cont_reading_from_srcdev_mode; /* see #define above */
378 int item_needs_writeback;
379 struct btrfs_device *srcdev;
380 struct btrfs_device *tgtdev;
382 struct mutex lock_finishing_cancel_unmount;
383 struct rw_semaphore rwsem;
385 struct btrfs_scrub_progress scrub_progress;
387 struct percpu_counter bio_counter;
388 wait_queue_head_t replace_wait;
391 /* For raid type sysfs entries */
392 struct raid_kobject {
395 struct list_head list;
398 struct btrfs_space_info {
401 u64 total_bytes; /* total bytes in the space,
402 this doesn't take mirrors into account */
403 u64 bytes_used; /* total bytes used,
404 this doesn't take mirrors into account */
405 u64 bytes_pinned; /* total bytes pinned, will be freed when the
406 transaction finishes */
407 u64 bytes_reserved; /* total bytes the allocator has reserved for
408 current allocations */
409 u64 bytes_may_use; /* number of bytes that may be used for
410 delalloc/allocations */
411 u64 bytes_readonly; /* total bytes that are read only */
413 u64 max_extent_size; /* This will hold the maximum extent size of
414 the space info if we had an ENOSPC in the
417 unsigned int full:1; /* indicates that we cannot allocate any more
418 chunks for this space */
419 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
421 unsigned int flush:1; /* set if we are trying to make space */
423 unsigned int force_alloc; /* set if we need to force a chunk
424 alloc for this space */
426 u64 disk_used; /* total bytes used on disk */
427 u64 disk_total; /* total bytes on disk, takes mirrors into
433 * bytes_pinned is kept in line with what is actually pinned, as in
434 * we've called update_block_group and dropped the bytes_used counter
435 * and increased the bytes_pinned counter. However this means that
436 * bytes_pinned does not reflect the bytes that will be pinned once the
437 * delayed refs are flushed, so this counter is inc'ed every time we
438 * call btrfs_free_extent so it is a realtime count of what will be
439 * freed once the transaction is committed. It will be zeroed every
440 * time the transaction commits.
442 struct percpu_counter total_bytes_pinned;
444 struct list_head list;
445 /* Protected by the spinlock 'lock'. */
446 struct list_head ro_bgs;
447 struct list_head priority_tickets;
448 struct list_head tickets;
450 * tickets_id just indicates the next ticket will be handled, so note
451 * it's not stored per ticket.
455 struct rw_semaphore groups_sem;
456 /* for block groups in our same type */
457 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
458 wait_queue_head_t wait;
461 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
465 * Types of block reserves
468 BTRFS_BLOCK_RSV_GLOBAL,
469 BTRFS_BLOCK_RSV_DELALLOC,
470 BTRFS_BLOCK_RSV_TRANS,
471 BTRFS_BLOCK_RSV_CHUNK,
472 BTRFS_BLOCK_RSV_DELOPS,
473 BTRFS_BLOCK_RSV_DELREFS,
474 BTRFS_BLOCK_RSV_EMPTY,
475 BTRFS_BLOCK_RSV_TEMP,
478 struct btrfs_block_rsv {
481 struct btrfs_space_info *space_info;
485 unsigned short failfast;
488 * Qgroup equivalent for @size @reserved
490 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
491 * about things like csum size nor how many tree blocks it will need to
494 * Qgroup cares more about net change of the extent usage.
496 * So for one newly inserted file extent, in worst case it will cause
497 * leaf split and level increase, nodesize for each file extent is
500 * In short, qgroup_size/reserved is the upper limit of possible needed
501 * qgroup metadata reservation.
504 u64 qgroup_rsv_reserved;
508 * free clusters are used to claim free space in relatively large chunks,
509 * allowing us to do less seeky writes. They are used for all metadata
510 * allocations. In ssd_spread mode they are also used for data allocations.
512 struct btrfs_free_cluster {
514 spinlock_t refill_lock;
517 /* largest extent in this cluster */
520 /* first extent starting offset */
523 /* We did a full search and couldn't create a cluster */
526 struct btrfs_block_group_cache *block_group;
528 * when a cluster is allocated from a block group, we put the
529 * cluster onto a list in the block group so that it can
530 * be freed before the block group is freed.
532 struct list_head block_group_list;
535 enum btrfs_caching_type {
539 BTRFS_CACHE_FINISHED,
543 enum btrfs_disk_cache_state {
550 struct btrfs_caching_control {
551 struct list_head list;
553 wait_queue_head_t wait;
554 struct btrfs_work work;
555 struct btrfs_block_group_cache *block_group;
560 /* Once caching_thread() finds this much free space, it will wake up waiters. */
561 #define CACHING_CTL_WAKE_UP SZ_2M
563 struct btrfs_io_ctl {
567 struct btrfs_fs_info *fs_info;
574 unsigned check_crcs:1;
578 * Tree to record all locked full stripes of a RAID5/6 block group
580 struct btrfs_full_stripe_locks_tree {
585 struct btrfs_block_group_cache {
586 struct btrfs_key key;
587 struct btrfs_block_group_item item;
588 struct btrfs_fs_info *fs_info;
596 u64 cache_generation;
599 * If the free space extent count exceeds this number, convert the block
602 u32 bitmap_high_thresh;
605 * If the free space extent count drops below this number, convert the
606 * block group back to extents.
608 u32 bitmap_low_thresh;
611 * It is just used for the delayed data space allocation because
612 * only the data space allocation and the relative metadata update
613 * can be done cross the transaction.
615 struct rw_semaphore data_rwsem;
617 /* for raid56, this is a full stripe, without parity */
618 unsigned long full_stripe_len;
622 unsigned int has_caching_ctl:1;
623 unsigned int removed:1;
625 int disk_cache_state;
627 /* cache tracking stuff */
629 struct btrfs_caching_control *caching_ctl;
630 u64 last_byte_to_unpin;
632 struct btrfs_space_info *space_info;
634 /* free space cache stuff */
635 struct btrfs_free_space_ctl *free_space_ctl;
637 /* block group cache stuff */
638 struct rb_node cache_node;
640 /* for block groups in the same raid type */
641 struct list_head list;
646 /* List of struct btrfs_free_clusters for this block group.
647 * Today it will only have one thing on it, but that may change
649 struct list_head cluster_list;
651 /* For delayed block group creation or deletion of empty block groups */
652 struct list_head bg_list;
654 /* For read-only block groups */
655 struct list_head ro_list;
659 /* For dirty block groups */
660 struct list_head dirty_list;
661 struct list_head io_list;
663 struct btrfs_io_ctl io_ctl;
666 * Incremented when doing extent allocations and holding a read lock
667 * on the space_info's groups_sem semaphore.
668 * Decremented when an ordered extent that represents an IO against this
669 * block group's range is created (after it's added to its inode's
670 * root's list of ordered extents) or immediately after the allocation
671 * if it's a metadata extent or fallocate extent (for these cases we
672 * don't create ordered extents).
674 atomic_t reservations;
677 * Incremented while holding the spinlock *lock* by a task checking if
678 * it can perform a nocow write (incremented if the value for the *ro*
679 * field is 0). Decremented by such tasks once they create an ordered
680 * extent or before that if some error happens before reaching that step.
681 * This is to prevent races between block group relocation and nocow
682 * writes through direct IO.
684 atomic_t nocow_writers;
686 /* Lock for free space tree operations. */
687 struct mutex free_space_lock;
690 * Does the block group need to be added to the free space tree?
691 * Protected by free_space_lock.
693 int needs_free_space;
695 /* Record locked full stripes for RAID5/6 block group */
696 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
699 /* delayed seq elem */
701 struct list_head list;
705 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
707 #define SEQ_LAST ((u64)-1)
709 enum btrfs_orphan_cleanup_state {
710 ORPHAN_CLEANUP_STARTED = 1,
711 ORPHAN_CLEANUP_DONE = 2,
714 /* used by the raid56 code to lock stripes for read/modify/write */
715 struct btrfs_stripe_hash {
716 struct list_head hash_list;
720 /* used by the raid56 code to lock stripes for read/modify/write */
721 struct btrfs_stripe_hash_table {
722 struct list_head stripe_cache;
723 spinlock_t cache_lock;
725 struct btrfs_stripe_hash table[];
728 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
730 void btrfs_init_async_reclaim_work(struct work_struct *work);
733 struct reloc_control;
735 struct btrfs_fs_devices;
736 struct btrfs_balance_control;
737 struct btrfs_delayed_root;
740 * Block group or device which contains an active swapfile. Used for preventing
741 * unsafe operations while a swapfile is active.
743 * These are sorted on (ptr, inode) (note that a block group or device can
744 * contain more than one swapfile). We compare the pointer values because we
745 * don't actually care what the object is, we just need a quick check whether
746 * the object exists in the rbtree.
748 struct btrfs_swapfile_pin {
753 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
754 * ptr points to a struct btrfs_device.
759 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
763 BTRFS_FS_CLOSING_START,
764 BTRFS_FS_CLOSING_DONE,
765 BTRFS_FS_LOG_RECOVERING,
767 BTRFS_FS_QUOTA_ENABLED,
768 BTRFS_FS_UPDATE_UUID_TREE_GEN,
769 BTRFS_FS_CREATING_FREE_SPACE_TREE,
773 BTRFS_FS_QUOTA_OVERRIDE,
774 /* Used to record internally whether fs has been frozen */
777 * Indicate that a whole-filesystem exclusive operation is running
778 * (device replace, resize, device add/delete, balance)
782 * To info transaction_kthread we need an immediate commit so it
783 * doesn't need to wait for commit_interval
785 BTRFS_FS_NEED_ASYNC_COMMIT,
787 * Indicate that balance has been set up from the ioctl and is in the
788 * main phase. The fs_info::balance_ctl is initialized.
790 BTRFS_FS_BALANCE_RUNNING,
792 /* Indicate that the cleaner thread is awake and doing something. */
793 BTRFS_FS_CLEANER_RUNNING,
796 struct btrfs_fs_info {
797 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
799 struct btrfs_root *extent_root;
800 struct btrfs_root *tree_root;
801 struct btrfs_root *chunk_root;
802 struct btrfs_root *dev_root;
803 struct btrfs_root *fs_root;
804 struct btrfs_root *csum_root;
805 struct btrfs_root *quota_root;
806 struct btrfs_root *uuid_root;
807 struct btrfs_root *free_space_root;
809 /* the log root tree is a directory of all the other log roots */
810 struct btrfs_root *log_root_tree;
812 spinlock_t fs_roots_radix_lock;
813 struct radix_tree_root fs_roots_radix;
815 /* block group cache stuff */
816 spinlock_t block_group_cache_lock;
817 u64 first_logical_byte;
818 struct rb_root block_group_cache_tree;
820 /* keep track of unallocated space */
821 atomic64_t free_chunk_space;
823 struct extent_io_tree freed_extents[2];
824 struct extent_io_tree *pinned_extents;
826 /* logical->physical extent mapping */
827 struct btrfs_mapping_tree mapping_tree;
830 * block reservation for extent, checksum, root tree and
831 * delayed dir index item
833 struct btrfs_block_rsv global_block_rsv;
834 /* block reservation for metadata operations */
835 struct btrfs_block_rsv trans_block_rsv;
836 /* block reservation for chunk tree */
837 struct btrfs_block_rsv chunk_block_rsv;
838 /* block reservation for delayed operations */
839 struct btrfs_block_rsv delayed_block_rsv;
840 /* block reservation for delayed refs */
841 struct btrfs_block_rsv delayed_refs_rsv;
843 struct btrfs_block_rsv empty_block_rsv;
846 u64 last_trans_committed;
847 u64 avg_delayed_ref_runtime;
850 * this is updated to the current trans every time a full commit
851 * is required instead of the faster short fsync log commits
853 u64 last_trans_log_full_commit;
854 unsigned long mount_opt;
856 * Track requests for actions that need to be done during transaction
857 * commit (like for some mount options).
859 unsigned long pending_changes;
860 unsigned long compress_type:4;
861 unsigned int compress_level;
864 * It is a suggestive number, the read side is safe even it gets a
865 * wrong number because we will write out the data into a regular
866 * extent. The write side(mount/remount) is under ->s_umount lock,
867 * so it is also safe.
871 struct btrfs_transaction *running_transaction;
872 wait_queue_head_t transaction_throttle;
873 wait_queue_head_t transaction_wait;
874 wait_queue_head_t transaction_blocked_wait;
875 wait_queue_head_t async_submit_wait;
878 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
879 * when they are updated.
881 * Because we do not clear the flags for ever, so we needn't use
882 * the lock on the read side.
884 * We also needn't use the lock when we mount the fs, because
885 * there is no other task which will update the flag.
887 spinlock_t super_lock;
888 struct btrfs_super_block *super_copy;
889 struct btrfs_super_block *super_for_commit;
890 struct super_block *sb;
891 struct inode *btree_inode;
892 struct mutex tree_log_mutex;
893 struct mutex transaction_kthread_mutex;
894 struct mutex cleaner_mutex;
895 struct mutex chunk_mutex;
898 * this is taken to make sure we don't set block groups ro after
899 * the free space cache has been allocated on them
901 struct mutex ro_block_group_mutex;
903 /* this is used during read/modify/write to make sure
904 * no two ios are trying to mod the same stripe at the same
907 struct btrfs_stripe_hash_table *stripe_hash_table;
910 * this protects the ordered operations list only while we are
911 * processing all of the entries on it. This way we make
912 * sure the commit code doesn't find the list temporarily empty
913 * because another function happens to be doing non-waiting preflush
914 * before jumping into the main commit.
916 struct mutex ordered_operations_mutex;
918 struct rw_semaphore commit_root_sem;
920 struct rw_semaphore cleanup_work_sem;
922 struct rw_semaphore subvol_sem;
923 struct srcu_struct subvol_srcu;
925 spinlock_t trans_lock;
927 * the reloc mutex goes with the trans lock, it is taken
928 * during commit to protect us from the relocation code
930 struct mutex reloc_mutex;
932 struct list_head trans_list;
933 struct list_head dead_roots;
934 struct list_head caching_block_groups;
936 spinlock_t delayed_iput_lock;
937 struct list_head delayed_iputs;
938 atomic_t nr_delayed_iputs;
939 wait_queue_head_t delayed_iputs_wait;
941 /* this protects tree_mod_seq_list */
942 spinlock_t tree_mod_seq_lock;
943 atomic64_t tree_mod_seq;
944 struct list_head tree_mod_seq_list;
946 /* this protects tree_mod_log */
947 rwlock_t tree_mod_log_lock;
948 struct rb_root tree_mod_log;
950 atomic_t async_delalloc_pages;
953 * this is used to protect the following list -- ordered_roots.
955 spinlock_t ordered_root_lock;
958 * all fs/file tree roots in which there are data=ordered extents
959 * pending writeback are added into this list.
961 * these can span multiple transactions and basically include
962 * every dirty data page that isn't from nodatacow
964 struct list_head ordered_roots;
966 struct mutex delalloc_root_mutex;
967 spinlock_t delalloc_root_lock;
968 /* all fs/file tree roots that have delalloc inodes. */
969 struct list_head delalloc_roots;
972 * there is a pool of worker threads for checksumming during writes
973 * and a pool for checksumming after reads. This is because readers
974 * can run with FS locks held, and the writers may be waiting for
975 * those locks. We don't want ordering in the pending list to cause
976 * deadlocks, and so the two are serviced separately.
978 * A third pool does submit_bio to avoid deadlocking with the other
981 struct btrfs_workqueue *workers;
982 struct btrfs_workqueue *delalloc_workers;
983 struct btrfs_workqueue *flush_workers;
984 struct btrfs_workqueue *endio_workers;
985 struct btrfs_workqueue *endio_meta_workers;
986 struct btrfs_workqueue *endio_raid56_workers;
987 struct btrfs_workqueue *endio_repair_workers;
988 struct btrfs_workqueue *rmw_workers;
989 struct btrfs_workqueue *endio_meta_write_workers;
990 struct btrfs_workqueue *endio_write_workers;
991 struct btrfs_workqueue *endio_freespace_worker;
992 struct btrfs_workqueue *submit_workers;
993 struct btrfs_workqueue *caching_workers;
994 struct btrfs_workqueue *readahead_workers;
997 * fixup workers take dirty pages that didn't properly go through
998 * the cow mechanism and make them safe to write. It happens
999 * for the sys_munmap function call path
1001 struct btrfs_workqueue *fixup_workers;
1002 struct btrfs_workqueue *delayed_workers;
1004 /* the extent workers do delayed refs on the extent allocation tree */
1005 struct btrfs_workqueue *extent_workers;
1006 struct task_struct *transaction_kthread;
1007 struct task_struct *cleaner_kthread;
1008 u32 thread_pool_size;
1010 struct kobject *space_info_kobj;
1011 struct list_head pending_raid_kobjs;
1012 spinlock_t pending_raid_kobjs_lock; /* uncontended */
1016 /* used to keep from writing metadata until there is a nice batch */
1017 struct percpu_counter dirty_metadata_bytes;
1018 struct percpu_counter delalloc_bytes;
1019 struct percpu_counter dio_bytes;
1020 s32 dirty_metadata_batch;
1023 struct list_head dirty_cowonly_roots;
1025 struct btrfs_fs_devices *fs_devices;
1028 * The space_info list is effectively read only after initial
1029 * setup. It is populated at mount time and cleaned up after
1030 * all block groups are removed. RCU is used to protect it.
1032 struct list_head space_info;
1034 struct btrfs_space_info *data_sinfo;
1036 struct reloc_control *reloc_ctl;
1038 /* data_alloc_cluster is only used in ssd_spread mode */
1039 struct btrfs_free_cluster data_alloc_cluster;
1041 /* all metadata allocations go through this cluster */
1042 struct btrfs_free_cluster meta_alloc_cluster;
1044 /* auto defrag inodes go here */
1045 spinlock_t defrag_inodes_lock;
1046 struct rb_root defrag_inodes;
1047 atomic_t defrag_running;
1049 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1050 seqlock_t profiles_lock;
1052 * these three are in extended format (availability of single
1053 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1054 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1056 u64 avail_data_alloc_bits;
1057 u64 avail_metadata_alloc_bits;
1058 u64 avail_system_alloc_bits;
1060 /* restriper state */
1061 spinlock_t balance_lock;
1062 struct mutex balance_mutex;
1063 atomic_t balance_pause_req;
1064 atomic_t balance_cancel_req;
1065 struct btrfs_balance_control *balance_ctl;
1066 wait_queue_head_t balance_wait_q;
1068 u32 data_chunk_allocations;
1073 /* private scrub information */
1074 struct mutex scrub_lock;
1075 atomic_t scrubs_running;
1076 atomic_t scrub_pause_req;
1077 atomic_t scrubs_paused;
1078 atomic_t scrub_cancel_req;
1079 wait_queue_head_t scrub_pause_wait;
1081 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
1084 refcount_t scrub_workers_refcnt;
1085 struct btrfs_workqueue *scrub_workers;
1086 struct btrfs_workqueue *scrub_wr_completion_workers;
1087 struct btrfs_workqueue *scrub_parity_workers;
1089 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1090 u32 check_integrity_print_mask;
1092 /* is qgroup tracking in a consistent state? */
1095 /* holds configuration and tracking. Protected by qgroup_lock */
1096 struct rb_root qgroup_tree;
1097 spinlock_t qgroup_lock;
1100 * used to avoid frequently calling ulist_alloc()/ulist_free()
1101 * when doing qgroup accounting, it must be protected by qgroup_lock.
1103 struct ulist *qgroup_ulist;
1105 /* protect user change for quota operations */
1106 struct mutex qgroup_ioctl_lock;
1108 /* list of dirty qgroups to be written at next commit */
1109 struct list_head dirty_qgroups;
1111 /* used by qgroup for an efficient tree traversal */
1114 /* qgroup rescan items */
1115 struct mutex qgroup_rescan_lock; /* protects the progress item */
1116 struct btrfs_key qgroup_rescan_progress;
1117 struct btrfs_workqueue *qgroup_rescan_workers;
1118 struct completion qgroup_rescan_completion;
1119 struct btrfs_work qgroup_rescan_work;
1120 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1122 /* filesystem state */
1123 unsigned long fs_state;
1125 struct btrfs_delayed_root *delayed_root;
1127 /* readahead tree */
1128 spinlock_t reada_lock;
1129 struct radix_tree_root reada_tree;
1131 /* readahead works cnt */
1132 atomic_t reada_works_cnt;
1134 /* Extent buffer radix tree */
1135 spinlock_t buffer_lock;
1136 struct radix_tree_root buffer_radix;
1138 /* next backup root to be overwritten */
1139 int backup_root_index;
1141 /* device replace state */
1142 struct btrfs_dev_replace dev_replace;
1144 struct semaphore uuid_tree_rescan_sem;
1146 /* Used to reclaim the metadata space in the background. */
1147 struct work_struct async_reclaim_work;
1149 spinlock_t unused_bgs_lock;
1150 struct list_head unused_bgs;
1151 struct mutex unused_bg_unpin_mutex;
1152 struct mutex delete_unused_bgs_mutex;
1154 /* Cached block sizes */
1159 /* Block groups and devices containing active swapfiles. */
1160 spinlock_t swapfile_pins_lock;
1161 struct rb_root swapfile_pins;
1163 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1164 spinlock_t ref_verify_lock;
1165 struct rb_root block_tree;
1169 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1171 return sb->s_fs_info;
1174 struct btrfs_subvolume_writers {
1175 struct percpu_counter counter;
1176 wait_queue_head_t wait;
1180 * The state of btrfs root
1184 * btrfs_record_root_in_trans is a multi-step process, and it can race
1185 * with the balancing code. But the race is very small, and only the
1186 * first time the root is added to each transaction. So IN_TRANS_SETUP
1187 * is used to tell us when more checks are required
1189 BTRFS_ROOT_IN_TRANS_SETUP,
1190 BTRFS_ROOT_REF_COWS,
1191 BTRFS_ROOT_TRACK_DIRTY,
1192 BTRFS_ROOT_IN_RADIX,
1193 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1194 BTRFS_ROOT_DEFRAG_RUNNING,
1195 BTRFS_ROOT_FORCE_COW,
1196 BTRFS_ROOT_MULTI_LOG_TASKS,
1198 BTRFS_ROOT_DELETING,
1201 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1203 * Set for the subvolume tree owning the reloc tree.
1205 BTRFS_ROOT_DEAD_RELOC_TREE,
1206 /* Mark dead root stored on device whose cleanup needs to be resumed */
1207 BTRFS_ROOT_DEAD_TREE,
1211 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1212 * code. For detail check comment in fs/btrfs/qgroup.c.
1214 struct btrfs_qgroup_swapped_blocks {
1216 /* RM_EMPTY_ROOT() of above blocks[] */
1218 struct rb_root blocks[BTRFS_MAX_LEVEL];
1222 * in ram representation of the tree. extent_root is used for all allocations
1223 * and for the extent tree extent_root root.
1226 struct extent_buffer *node;
1228 struct extent_buffer *commit_root;
1229 struct btrfs_root *log_root;
1230 struct btrfs_root *reloc_root;
1232 unsigned long state;
1233 struct btrfs_root_item root_item;
1234 struct btrfs_key root_key;
1235 struct btrfs_fs_info *fs_info;
1236 struct extent_io_tree dirty_log_pages;
1238 struct mutex objectid_mutex;
1240 spinlock_t accounting_lock;
1241 struct btrfs_block_rsv *block_rsv;
1243 /* free ino cache stuff */
1244 struct btrfs_free_space_ctl *free_ino_ctl;
1245 enum btrfs_caching_type ino_cache_state;
1246 spinlock_t ino_cache_lock;
1247 wait_queue_head_t ino_cache_wait;
1248 struct btrfs_free_space_ctl *free_ino_pinned;
1249 u64 ino_cache_progress;
1250 struct inode *ino_cache_inode;
1252 struct mutex log_mutex;
1253 wait_queue_head_t log_writer_wait;
1254 wait_queue_head_t log_commit_wait[2];
1255 struct list_head log_ctxs[2];
1256 atomic_t log_writers;
1257 atomic_t log_commit[2];
1260 /* No matter the commit succeeds or not*/
1261 int log_transid_committed;
1262 /* Just be updated when the commit succeeds. */
1263 int last_log_commit;
1264 pid_t log_start_pid;
1270 u64 highest_objectid;
1272 u64 defrag_trans_start;
1273 struct btrfs_key defrag_progress;
1274 struct btrfs_key defrag_max;
1276 /* the dirty list is only used by non-reference counted roots */
1277 struct list_head dirty_list;
1279 struct list_head root_list;
1281 spinlock_t log_extents_lock[2];
1282 struct list_head logged_list[2];
1284 int orphan_cleanup_state;
1286 spinlock_t inode_lock;
1287 /* red-black tree that keeps track of in-memory inodes */
1288 struct rb_root inode_tree;
1291 * radix tree that keeps track of delayed nodes of every inode,
1292 * protected by inode_lock
1294 struct radix_tree_root delayed_nodes_tree;
1296 * right now this just gets used so that a root has its own devid
1297 * for stat. It may be used for more later
1301 spinlock_t root_item_lock;
1304 struct mutex delalloc_mutex;
1305 spinlock_t delalloc_lock;
1307 * all of the inodes that have delalloc bytes. It is possible for
1308 * this list to be empty even when there is still dirty data=ordered
1309 * extents waiting to finish IO.
1311 struct list_head delalloc_inodes;
1312 struct list_head delalloc_root;
1313 u64 nr_delalloc_inodes;
1315 struct mutex ordered_extent_mutex;
1317 * this is used by the balancing code to wait for all the pending
1320 spinlock_t ordered_extent_lock;
1323 * all of the data=ordered extents pending writeback
1324 * these can span multiple transactions and basically include
1325 * every dirty data page that isn't from nodatacow
1327 struct list_head ordered_extents;
1328 struct list_head ordered_root;
1329 u64 nr_ordered_extents;
1332 * Not empty if this subvolume root has gone through tree block swap
1335 * Will be used by reloc_control::dirty_subvol_roots.
1337 struct list_head reloc_dirty_list;
1340 * Number of currently running SEND ioctls to prevent
1341 * manipulation with the read-only status via SUBVOL_SETFLAGS
1343 int send_in_progress;
1345 * Number of currently running deduplication operations that have a
1346 * destination inode belonging to this root. Protected by the lock
1349 int dedupe_in_progress;
1350 struct btrfs_subvolume_writers *subv_writers;
1351 atomic_t will_be_snapshotted;
1352 atomic_t snapshot_force_cow;
1354 /* For qgroup metadata reserved space */
1355 spinlock_t qgroup_meta_rsv_lock;
1356 u64 qgroup_meta_rsv_pertrans;
1357 u64 qgroup_meta_rsv_prealloc;
1359 /* Number of active swapfiles */
1360 atomic_t nr_swapfiles;
1362 /* Record pairs of swapped blocks for qgroup */
1363 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1365 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1370 struct btrfs_file_private {
1374 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1376 return btrfs_sb(inode->i_sb)->sectorsize;
1379 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1382 return info->nodesize - sizeof(struct btrfs_header);
1385 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1387 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1389 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1392 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1394 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1397 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1398 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1399 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1401 return BTRFS_MAX_ITEM_SIZE(info) -
1402 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1405 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1407 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1411 * Flags for mount options.
1413 * Note: don't forget to add new options to btrfs_show_options()
1415 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1416 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1417 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1418 #define BTRFS_MOUNT_SSD (1 << 3)
1419 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1420 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1421 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1422 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1423 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1424 #define BTRFS_MOUNT_NOSSD (1 << 9)
1425 #define BTRFS_MOUNT_DISCARD (1 << 10)
1426 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1427 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1428 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1429 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1430 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1431 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1432 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1433 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1434 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1435 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1436 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1437 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1438 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1439 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1440 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1441 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1442 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1443 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1445 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1446 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1448 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1449 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1450 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1451 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1454 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1456 if (!btrfs_test_opt(fs_info, opt)) \
1457 btrfs_info(fs_info, fmt, ##args); \
1458 btrfs_set_opt(fs_info->mount_opt, opt); \
1461 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1463 if (btrfs_test_opt(fs_info, opt)) \
1464 btrfs_info(fs_info, fmt, ##args); \
1465 btrfs_clear_opt(fs_info->mount_opt, opt); \
1468 #ifdef CONFIG_BTRFS_DEBUG
1470 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1472 struct btrfs_fs_info *fs_info = block_group->fs_info;
1474 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1475 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1476 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1477 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1482 * Requests for changes that need to be done during transaction commit.
1484 * Internal mount options that are used for special handling of the real
1485 * mount options (eg. cannot be set during remount and have to be set during
1486 * transaction commit)
1489 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1490 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1491 #define BTRFS_PENDING_COMMIT (2)
1493 #define btrfs_test_pending(info, opt) \
1494 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1495 #define btrfs_set_pending(info, opt) \
1496 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1497 #define btrfs_clear_pending(info, opt) \
1498 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1501 * Helpers for setting pending mount option changes.
1503 * Expects corresponding macros
1504 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1506 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1508 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1509 btrfs_info((info), fmt, ##args); \
1510 btrfs_set_pending((info), SET_##opt); \
1511 btrfs_clear_pending((info), CLEAR_##opt); \
1515 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1517 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1518 btrfs_info((info), fmt, ##args); \
1519 btrfs_set_pending((info), CLEAR_##opt); \
1520 btrfs_clear_pending((info), SET_##opt); \
1527 #define BTRFS_INODE_NODATASUM (1 << 0)
1528 #define BTRFS_INODE_NODATACOW (1 << 1)
1529 #define BTRFS_INODE_READONLY (1 << 2)
1530 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1531 #define BTRFS_INODE_PREALLOC (1 << 4)
1532 #define BTRFS_INODE_SYNC (1 << 5)
1533 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1534 #define BTRFS_INODE_APPEND (1 << 7)
1535 #define BTRFS_INODE_NODUMP (1 << 8)
1536 #define BTRFS_INODE_NOATIME (1 << 9)
1537 #define BTRFS_INODE_DIRSYNC (1 << 10)
1538 #define BTRFS_INODE_COMPRESS (1 << 11)
1540 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1542 #define BTRFS_INODE_FLAG_MASK \
1543 (BTRFS_INODE_NODATASUM | \
1544 BTRFS_INODE_NODATACOW | \
1545 BTRFS_INODE_READONLY | \
1546 BTRFS_INODE_NOCOMPRESS | \
1547 BTRFS_INODE_PREALLOC | \
1548 BTRFS_INODE_SYNC | \
1549 BTRFS_INODE_IMMUTABLE | \
1550 BTRFS_INODE_APPEND | \
1551 BTRFS_INODE_NODUMP | \
1552 BTRFS_INODE_NOATIME | \
1553 BTRFS_INODE_DIRSYNC | \
1554 BTRFS_INODE_COMPRESS | \
1555 BTRFS_INODE_ROOT_ITEM_INIT)
1557 struct btrfs_map_token {
1558 const struct extent_buffer *eb;
1560 unsigned long offset;
1563 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1564 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1566 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1568 token->kaddr = NULL;
1571 /* some macros to generate set/get functions for the struct fields. This
1572 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1575 #define le8_to_cpu(v) (v)
1576 #define cpu_to_le8(v) (v)
1579 #define read_eb_member(eb, ptr, type, member, result) (\
1580 read_extent_buffer(eb, (char *)(result), \
1581 ((unsigned long)(ptr)) + \
1582 offsetof(type, member), \
1583 sizeof(((type *)0)->member)))
1585 #define write_eb_member(eb, ptr, type, member, result) (\
1586 write_extent_buffer(eb, (char *)(result), \
1587 ((unsigned long)(ptr)) + \
1588 offsetof(type, member), \
1589 sizeof(((type *)0)->member)))
1591 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1592 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1593 const void *ptr, unsigned long off, \
1594 struct btrfs_map_token *token); \
1595 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1596 unsigned long off, u##bits val, \
1597 struct btrfs_map_token *token); \
1598 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1600 unsigned long off) \
1602 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1604 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1605 unsigned long off, u##bits val) \
1607 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1610 DECLARE_BTRFS_SETGET_BITS(8)
1611 DECLARE_BTRFS_SETGET_BITS(16)
1612 DECLARE_BTRFS_SETGET_BITS(32)
1613 DECLARE_BTRFS_SETGET_BITS(64)
1615 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1616 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1619 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1620 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1622 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1625 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1626 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1628 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1630 struct btrfs_map_token *token) \
1632 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1633 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1635 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1636 type *s, u##bits val, \
1637 struct btrfs_map_token *token) \
1639 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1640 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1643 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1644 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1646 const type *p = page_address(eb->pages[0]); \
1647 u##bits res = le##bits##_to_cpu(p->member); \
1650 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1653 type *p = page_address(eb->pages[0]); \
1654 p->member = cpu_to_le##bits(val); \
1657 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1658 static inline u##bits btrfs_##name(const type *s) \
1660 return le##bits##_to_cpu(s->member); \
1662 static inline void btrfs_set_##name(type *s, u##bits val) \
1664 s->member = cpu_to_le##bits(val); \
1668 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1669 struct btrfs_dev_item *s)
1671 BUILD_BUG_ON(sizeof(u64) !=
1672 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1673 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1676 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1677 struct btrfs_dev_item *s,
1680 BUILD_BUG_ON(sizeof(u64) !=
1681 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1682 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1683 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1687 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1688 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1689 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1690 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1691 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1693 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1694 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1695 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1696 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1697 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1698 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1700 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1701 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1703 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1705 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1707 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1709 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1711 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1712 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1714 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1716 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1718 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1721 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1723 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1726 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1728 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1731 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1732 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1733 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1734 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1735 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1736 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1737 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1738 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1739 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1740 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1741 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1743 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1745 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1748 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1749 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1750 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1752 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1754 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1756 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1758 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1759 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1761 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1763 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1764 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1766 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1769 unsigned long offset = (unsigned long)c;
1770 offset += offsetof(struct btrfs_chunk, stripe);
1771 offset += nr * sizeof(struct btrfs_stripe);
1772 return (struct btrfs_stripe *)offset;
1775 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1777 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1780 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1781 struct btrfs_chunk *c, int nr)
1783 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1786 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1787 struct btrfs_chunk *c, int nr)
1789 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1792 /* struct btrfs_block_group_item */
1793 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1795 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1797 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1798 struct btrfs_block_group_item, chunk_objectid, 64);
1800 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1801 struct btrfs_block_group_item, chunk_objectid, 64);
1802 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1803 struct btrfs_block_group_item, flags, 64);
1804 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1805 struct btrfs_block_group_item, flags, 64);
1807 /* struct btrfs_free_space_info */
1808 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1810 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1812 /* struct btrfs_inode_ref */
1813 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1814 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1816 /* struct btrfs_inode_extref */
1817 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1818 parent_objectid, 64);
1819 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1821 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1823 /* struct btrfs_inode_item */
1824 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1825 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1826 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1827 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1828 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1829 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1830 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1831 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1832 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1833 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1834 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1835 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1836 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1838 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1840 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1842 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1843 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1845 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1847 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1848 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1849 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1850 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1851 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1852 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1853 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1854 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1855 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1856 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1858 /* struct btrfs_dev_extent */
1859 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1861 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1862 chunk_objectid, 64);
1863 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1865 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1867 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1869 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1870 return (unsigned long)dev + ptr;
1873 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1874 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1876 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1878 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1881 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1883 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1884 struct btrfs_tree_block_info *item,
1885 struct btrfs_disk_key *key)
1887 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1890 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1891 struct btrfs_tree_block_info *item,
1892 struct btrfs_disk_key *key)
1894 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1897 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1899 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1901 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1903 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1906 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1909 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1911 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1914 static inline u32 btrfs_extent_inline_ref_size(int type)
1916 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1917 type == BTRFS_SHARED_BLOCK_REF_KEY)
1918 return sizeof(struct btrfs_extent_inline_ref);
1919 if (type == BTRFS_SHARED_DATA_REF_KEY)
1920 return sizeof(struct btrfs_shared_data_ref) +
1921 sizeof(struct btrfs_extent_inline_ref);
1922 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1923 return sizeof(struct btrfs_extent_data_ref) +
1924 offsetof(struct btrfs_extent_inline_ref, offset);
1928 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1929 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1931 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1932 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1934 /* struct btrfs_node */
1935 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1936 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1937 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1939 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1942 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1945 ptr = offsetof(struct btrfs_node, ptrs) +
1946 sizeof(struct btrfs_key_ptr) * nr;
1947 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1950 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1954 ptr = offsetof(struct btrfs_node, ptrs) +
1955 sizeof(struct btrfs_key_ptr) * nr;
1956 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1959 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1962 ptr = offsetof(struct btrfs_node, ptrs) +
1963 sizeof(struct btrfs_key_ptr) * nr;
1964 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1967 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1971 ptr = offsetof(struct btrfs_node, ptrs) +
1972 sizeof(struct btrfs_key_ptr) * nr;
1973 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1976 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1978 return offsetof(struct btrfs_node, ptrs) +
1979 sizeof(struct btrfs_key_ptr) * nr;
1982 void btrfs_node_key(const struct extent_buffer *eb,
1983 struct btrfs_disk_key *disk_key, int nr);
1985 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1986 struct btrfs_disk_key *disk_key, int nr)
1989 ptr = btrfs_node_key_ptr_offset(nr);
1990 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1991 struct btrfs_key_ptr, key, disk_key);
1994 /* struct btrfs_item */
1995 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1996 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1997 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1998 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2000 static inline unsigned long btrfs_item_nr_offset(int nr)
2002 return offsetof(struct btrfs_leaf, items) +
2003 sizeof(struct btrfs_item) * nr;
2006 static inline struct btrfs_item *btrfs_item_nr(int nr)
2008 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2011 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
2012 struct btrfs_item *item)
2014 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2017 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
2019 return btrfs_item_end(eb, btrfs_item_nr(nr));
2022 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
2024 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2027 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
2029 return btrfs_item_size(eb, btrfs_item_nr(nr));
2032 static inline void btrfs_item_key(const struct extent_buffer *eb,
2033 struct btrfs_disk_key *disk_key, int nr)
2035 struct btrfs_item *item = btrfs_item_nr(nr);
2036 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2039 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2040 struct btrfs_disk_key *disk_key, int nr)
2042 struct btrfs_item *item = btrfs_item_nr(nr);
2043 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2046 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2049 * struct btrfs_root_ref
2051 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2052 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2053 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2055 /* struct btrfs_dir_item */
2056 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2057 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2058 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2059 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2060 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2061 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2063 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2065 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2068 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
2069 const struct btrfs_dir_item *item,
2070 struct btrfs_disk_key *key)
2072 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2075 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2076 struct btrfs_dir_item *item,
2077 const struct btrfs_disk_key *key)
2079 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2082 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2084 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2086 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2089 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2090 const struct btrfs_free_space_header *h,
2091 struct btrfs_disk_key *key)
2093 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2096 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2097 struct btrfs_free_space_header *h,
2098 const struct btrfs_disk_key *key)
2100 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2103 /* struct btrfs_disk_key */
2104 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2106 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2107 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2109 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2110 const struct btrfs_disk_key *disk)
2112 cpu->offset = le64_to_cpu(disk->offset);
2113 cpu->type = disk->type;
2114 cpu->objectid = le64_to_cpu(disk->objectid);
2117 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2118 const struct btrfs_key *cpu)
2120 disk->offset = cpu_to_le64(cpu->offset);
2121 disk->type = cpu->type;
2122 disk->objectid = cpu_to_le64(cpu->objectid);
2125 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2126 struct btrfs_key *key, int nr)
2128 struct btrfs_disk_key disk_key;
2129 btrfs_node_key(eb, &disk_key, nr);
2130 btrfs_disk_key_to_cpu(key, &disk_key);
2133 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2134 struct btrfs_key *key, int nr)
2136 struct btrfs_disk_key disk_key;
2137 btrfs_item_key(eb, &disk_key, nr);
2138 btrfs_disk_key_to_cpu(key, &disk_key);
2141 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2142 const struct btrfs_dir_item *item,
2143 struct btrfs_key *key)
2145 struct btrfs_disk_key disk_key;
2146 btrfs_dir_item_key(eb, item, &disk_key);
2147 btrfs_disk_key_to_cpu(key, &disk_key);
2150 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2155 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2160 /* struct btrfs_header */
2161 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2162 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2164 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2165 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2166 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2167 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2168 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2170 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2171 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2173 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2175 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2177 return (btrfs_header_flags(eb) & flag) == flag;
2180 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2182 u64 flags = btrfs_header_flags(eb);
2183 btrfs_set_header_flags(eb, flags | flag);
2186 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2188 u64 flags = btrfs_header_flags(eb);
2189 btrfs_set_header_flags(eb, flags & ~flag);
2192 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2194 u64 flags = btrfs_header_flags(eb);
2195 return flags >> BTRFS_BACKREF_REV_SHIFT;
2198 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2201 u64 flags = btrfs_header_flags(eb);
2202 flags &= ~BTRFS_BACKREF_REV_MASK;
2203 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2204 btrfs_set_header_flags(eb, flags);
2207 static inline unsigned long btrfs_header_fsid(void)
2209 return offsetof(struct btrfs_header, fsid);
2212 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2214 return offsetof(struct btrfs_header, chunk_tree_uuid);
2217 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2219 return btrfs_header_level(eb) == 0;
2222 /* struct btrfs_root_item */
2223 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2225 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2226 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2227 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2229 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2231 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2232 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2233 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2234 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2235 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2236 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2237 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2238 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2240 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2242 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2244 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2246 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2248 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2251 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2253 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2256 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2258 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2261 /* struct btrfs_root_backup */
2262 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2264 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2266 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2267 tree_root_level, 8);
2269 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2271 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2272 chunk_root_gen, 64);
2273 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2274 chunk_root_level, 8);
2276 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2278 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2279 extent_root_gen, 64);
2280 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2281 extent_root_level, 8);
2283 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2285 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2287 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2290 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2292 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2294 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2297 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2299 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2301 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2302 csum_root_level, 8);
2303 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2305 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2307 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2310 /* struct btrfs_balance_item */
2311 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2313 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2314 const struct btrfs_balance_item *bi,
2315 struct btrfs_disk_balance_args *ba)
2317 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2320 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2321 struct btrfs_balance_item *bi,
2322 const struct btrfs_disk_balance_args *ba)
2324 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2327 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2328 const struct btrfs_balance_item *bi,
2329 struct btrfs_disk_balance_args *ba)
2331 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2334 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2335 struct btrfs_balance_item *bi,
2336 const struct btrfs_disk_balance_args *ba)
2338 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2341 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2342 const struct btrfs_balance_item *bi,
2343 struct btrfs_disk_balance_args *ba)
2345 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2348 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2349 struct btrfs_balance_item *bi,
2350 const struct btrfs_disk_balance_args *ba)
2352 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2356 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2357 const struct btrfs_disk_balance_args *disk)
2359 memset(cpu, 0, sizeof(*cpu));
2361 cpu->profiles = le64_to_cpu(disk->profiles);
2362 cpu->usage = le64_to_cpu(disk->usage);
2363 cpu->devid = le64_to_cpu(disk->devid);
2364 cpu->pstart = le64_to_cpu(disk->pstart);
2365 cpu->pend = le64_to_cpu(disk->pend);
2366 cpu->vstart = le64_to_cpu(disk->vstart);
2367 cpu->vend = le64_to_cpu(disk->vend);
2368 cpu->target = le64_to_cpu(disk->target);
2369 cpu->flags = le64_to_cpu(disk->flags);
2370 cpu->limit = le64_to_cpu(disk->limit);
2371 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2372 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2376 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2377 const struct btrfs_balance_args *cpu)
2379 memset(disk, 0, sizeof(*disk));
2381 disk->profiles = cpu_to_le64(cpu->profiles);
2382 disk->usage = cpu_to_le64(cpu->usage);
2383 disk->devid = cpu_to_le64(cpu->devid);
2384 disk->pstart = cpu_to_le64(cpu->pstart);
2385 disk->pend = cpu_to_le64(cpu->pend);
2386 disk->vstart = cpu_to_le64(cpu->vstart);
2387 disk->vend = cpu_to_le64(cpu->vend);
2388 disk->target = cpu_to_le64(cpu->target);
2389 disk->flags = cpu_to_le64(cpu->flags);
2390 disk->limit = cpu_to_le64(cpu->limit);
2391 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2392 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2395 /* struct btrfs_super_block */
2396 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2397 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2398 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2400 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2401 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2402 struct btrfs_super_block, sys_chunk_array_size, 32);
2403 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2404 struct btrfs_super_block, chunk_root_generation, 64);
2405 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2407 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2409 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2410 chunk_root_level, 8);
2411 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2413 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2414 log_root_transid, 64);
2415 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2417 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2419 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2421 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2423 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2425 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2427 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2428 root_dir_objectid, 64);
2429 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2431 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2433 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2434 compat_ro_flags, 64);
2435 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2436 incompat_flags, 64);
2437 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2439 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2440 cache_generation, 64);
2441 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2442 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2443 uuid_tree_generation, 64);
2445 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2447 u16 t = btrfs_super_csum_type(s);
2449 * csum type is validated at mount time
2451 return btrfs_csum_sizes[t];
2456 * The leaf data grows from end-to-front in the node.
2457 * this returns the address of the start of the last item,
2458 * which is the stop of the leaf data stack
2460 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2462 u32 nr = btrfs_header_nritems(leaf);
2465 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2466 return btrfs_item_offset_nr(leaf, nr - 1);
2469 /* struct btrfs_file_extent_item */
2470 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2471 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2472 struct btrfs_file_extent_item, disk_bytenr, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2474 struct btrfs_file_extent_item, offset, 64);
2475 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2476 struct btrfs_file_extent_item, generation, 64);
2477 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2478 struct btrfs_file_extent_item, num_bytes, 64);
2479 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2480 struct btrfs_file_extent_item, disk_num_bytes, 64);
2481 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2482 struct btrfs_file_extent_item, compression, 8);
2484 static inline unsigned long
2485 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2487 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2490 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2492 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2495 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2497 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2499 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2500 disk_num_bytes, 64);
2501 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2503 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2505 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2507 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2509 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2511 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2512 other_encoding, 16);
2515 * this returns the number of bytes used by the item on disk, minus the
2516 * size of any extent headers. If a file is compressed on disk, this is
2517 * the compressed size
2519 static inline u32 btrfs_file_extent_inline_item_len(
2520 const struct extent_buffer *eb,
2521 struct btrfs_item *e)
2523 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2526 /* btrfs_dev_stats_item */
2527 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2528 const struct btrfs_dev_stats_item *ptr,
2533 read_extent_buffer(eb, &val,
2534 offsetof(struct btrfs_dev_stats_item, values) +
2535 ((unsigned long)ptr) + (index * sizeof(u64)),
2540 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2541 struct btrfs_dev_stats_item *ptr,
2544 write_extent_buffer(eb, &val,
2545 offsetof(struct btrfs_dev_stats_item, values) +
2546 ((unsigned long)ptr) + (index * sizeof(u64)),
2550 /* btrfs_qgroup_status_item */
2551 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2553 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2555 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2557 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2560 /* btrfs_qgroup_info_item */
2561 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2563 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2564 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2566 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2567 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2570 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2571 struct btrfs_qgroup_info_item, generation, 64);
2572 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2574 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2575 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2576 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2578 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2579 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2581 /* btrfs_qgroup_limit_item */
2582 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2584 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2586 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2588 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2590 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2593 /* btrfs_dev_replace_item */
2594 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2595 struct btrfs_dev_replace_item, src_devid, 64);
2596 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2597 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2599 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2601 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2603 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2605 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2606 num_write_errors, 64);
2607 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2608 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2610 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2612 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2615 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2616 struct btrfs_dev_replace_item, src_devid, 64);
2617 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2618 struct btrfs_dev_replace_item,
2619 cont_reading_from_srcdev_mode, 64);
2620 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2621 struct btrfs_dev_replace_item, replace_state, 64);
2622 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2623 struct btrfs_dev_replace_item, time_started, 64);
2624 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2625 struct btrfs_dev_replace_item, time_stopped, 64);
2626 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2627 struct btrfs_dev_replace_item, num_write_errors, 64);
2628 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2629 struct btrfs_dev_replace_item,
2630 num_uncorrectable_read_errors, 64);
2631 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2632 struct btrfs_dev_replace_item, cursor_left, 64);
2633 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2634 struct btrfs_dev_replace_item, cursor_right, 64);
2636 /* helper function to cast into the data area of the leaf. */
2637 #define btrfs_item_ptr(leaf, slot, type) \
2638 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2639 btrfs_item_offset_nr(leaf, slot)))
2641 #define btrfs_item_ptr_offset(leaf, slot) \
2642 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2643 btrfs_item_offset_nr(leaf, slot)))
2645 static inline u64 btrfs_name_hash(const char *name, int len)
2647 return crc32c((u32)~1, name, len);
2651 * Figure the key offset of an extended inode ref
2653 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2656 return (u64) crc32c(parent_objectid, name, len);
2659 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2661 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2662 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2665 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2667 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2672 enum btrfs_inline_ref_type {
2673 BTRFS_REF_TYPE_INVALID,
2674 BTRFS_REF_TYPE_BLOCK,
2675 BTRFS_REF_TYPE_DATA,
2679 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2680 struct btrfs_extent_inline_ref *iref,
2681 enum btrfs_inline_ref_type is_data);
2683 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2685 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2688 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2692 * Doing a truncate won't result in new nodes or leaves, just what we need for
2695 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2698 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2701 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans);
2702 bool btrfs_check_space_for_delayed_refs(struct btrfs_fs_info *fs_info);
2703 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2705 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2706 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2707 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2708 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2709 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2710 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2711 unsigned long count);
2712 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2713 struct btrfs_delayed_ref_root *delayed_refs,
2714 struct btrfs_delayed_ref_head *head);
2715 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2716 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2717 struct btrfs_fs_info *fs_info, u64 bytenr,
2718 u64 offset, int metadata, u64 *refs, u64 *flags);
2719 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2720 u64 bytenr, u64 num, int reserved);
2721 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2722 u64 bytenr, u64 num_bytes);
2723 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2724 int btrfs_cross_ref_exist(struct btrfs_root *root,
2725 u64 objectid, u64 offset, u64 bytenr);
2726 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2727 struct btrfs_fs_info *info,
2729 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2730 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2731 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2732 struct btrfs_root *root,
2733 u64 parent, u64 root_objectid,
2734 const struct btrfs_disk_key *key,
2735 int level, u64 hint,
2737 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2738 struct btrfs_root *root,
2739 struct extent_buffer *buf,
2740 u64 parent, int last_ref);
2741 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root, u64 owner,
2743 u64 offset, u64 ram_bytes,
2744 struct btrfs_key *ins);
2745 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2746 u64 root_objectid, u64 owner, u64 offset,
2747 struct btrfs_key *ins);
2748 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2749 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2750 struct btrfs_key *ins, int is_data, int delalloc);
2751 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2752 struct extent_buffer *buf, int full_backref);
2753 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2754 struct extent_buffer *buf, int full_backref);
2755 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2756 u64 bytenr, u64 num_bytes, u64 flags,
2757 int level, int is_data);
2758 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2760 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2761 u64 start, u64 len, int delalloc);
2762 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2763 u64 start, u64 len);
2764 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2765 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2766 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2767 struct btrfs_ref *generic_ref);
2769 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2770 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
2771 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
2772 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2773 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2774 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2775 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2776 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2777 u64 bytes_used, u64 type, u64 chunk_offset,
2779 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2780 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2781 struct btrfs_fs_info *fs_info,
2782 const u64 chunk_offset);
2783 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2784 u64 group_start, struct extent_map *em);
2785 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2786 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2787 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2788 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2789 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2790 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2791 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2792 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2794 enum btrfs_reserve_flush_enum {
2795 /* If we are in the transaction, we can't flush anything.*/
2796 BTRFS_RESERVE_NO_FLUSH,
2798 * Flushing delalloc may cause deadlock somewhere, in this
2799 * case, use FLUSH LIMIT
2801 BTRFS_RESERVE_FLUSH_LIMIT,
2802 BTRFS_RESERVE_FLUSH_ALL,
2805 enum btrfs_flush_state {
2806 FLUSH_DELAYED_ITEMS_NR = 1,
2807 FLUSH_DELAYED_ITEMS = 2,
2808 FLUSH_DELAYED_REFS_NR = 3,
2809 FLUSH_DELAYED_REFS = 4,
2811 FLUSH_DELALLOC_WAIT = 6,
2813 ALLOC_CHUNK_FORCE = 8,
2817 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2818 int btrfs_check_data_free_space(struct inode *inode,
2819 struct extent_changeset **reserved, u64 start, u64 len);
2820 void btrfs_free_reserved_data_space(struct inode *inode,
2821 struct extent_changeset *reserved, u64 start, u64 len);
2822 void btrfs_delalloc_release_space(struct inode *inode,
2823 struct extent_changeset *reserved,
2824 u64 start, u64 len, bool qgroup_free);
2825 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2827 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2828 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2829 struct btrfs_block_rsv *rsv,
2830 int nitems, bool use_global_rsv);
2831 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2832 struct btrfs_block_rsv *rsv);
2833 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2836 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2837 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2839 int btrfs_delalloc_reserve_space(struct inode *inode,
2840 struct extent_changeset **reserved, u64 start, u64 len);
2841 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2842 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2843 unsigned short type);
2844 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2845 struct btrfs_block_rsv *rsv,
2846 unsigned short type);
2847 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2848 struct btrfs_block_rsv *rsv);
2849 int btrfs_block_rsv_add(struct btrfs_root *root,
2850 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2851 enum btrfs_reserve_flush_enum flush);
2852 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2853 int btrfs_block_rsv_refill(struct btrfs_root *root,
2854 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2855 enum btrfs_reserve_flush_enum flush);
2856 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2857 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2859 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2860 struct btrfs_block_rsv *dest, u64 num_bytes,
2862 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2863 struct btrfs_block_rsv *block_rsv,
2865 void btrfs_delayed_refs_rsv_release(struct btrfs_fs_info *fs_info, int nr);
2866 void btrfs_update_delayed_refs_rsv(struct btrfs_trans_handle *trans);
2867 int btrfs_delayed_refs_rsv_refill(struct btrfs_fs_info *fs_info,
2868 enum btrfs_reserve_flush_enum flush);
2869 void btrfs_migrate_to_delayed_refs_rsv(struct btrfs_fs_info *fs_info,
2870 struct btrfs_block_rsv *src,
2872 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2873 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2874 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2875 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2876 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2877 u64 start, u64 end);
2878 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2879 u64 num_bytes, u64 *actual_bytes);
2880 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2881 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2883 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2884 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2885 struct btrfs_fs_info *fs_info);
2886 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2887 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2888 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2889 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2890 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2891 u64 start, u64 end);
2892 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2895 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2896 int level, int *slot);
2897 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2898 int btrfs_previous_item(struct btrfs_root *root,
2899 struct btrfs_path *path, u64 min_objectid,
2901 int btrfs_previous_extent_item(struct btrfs_root *root,
2902 struct btrfs_path *path, u64 min_objectid);
2903 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2904 struct btrfs_path *path,
2905 const struct btrfs_key *new_key);
2906 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2907 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2908 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2909 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2910 struct btrfs_key *key, int lowest_level,
2912 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2913 struct btrfs_path *path,
2915 enum btrfs_compare_tree_result {
2916 BTRFS_COMPARE_TREE_NEW,
2917 BTRFS_COMPARE_TREE_DELETED,
2918 BTRFS_COMPARE_TREE_CHANGED,
2919 BTRFS_COMPARE_TREE_SAME,
2921 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2922 struct btrfs_path *right_path,
2923 struct btrfs_key *key,
2924 enum btrfs_compare_tree_result result,
2926 int btrfs_compare_trees(struct btrfs_root *left_root,
2927 struct btrfs_root *right_root,
2928 btrfs_changed_cb_t cb, void *ctx);
2929 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2930 struct btrfs_root *root, struct extent_buffer *buf,
2931 struct extent_buffer *parent, int parent_slot,
2932 struct extent_buffer **cow_ret);
2933 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2934 struct btrfs_root *root,
2935 struct extent_buffer *buf,
2936 struct extent_buffer **cow_ret, u64 new_root_objectid);
2937 int btrfs_block_can_be_shared(struct btrfs_root *root,
2938 struct extent_buffer *buf);
2939 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2940 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2941 int btrfs_split_item(struct btrfs_trans_handle *trans,
2942 struct btrfs_root *root,
2943 struct btrfs_path *path,
2944 const struct btrfs_key *new_key,
2945 unsigned long split_offset);
2946 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2947 struct btrfs_root *root,
2948 struct btrfs_path *path,
2949 const struct btrfs_key *new_key);
2950 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2951 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2952 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2953 const struct btrfs_key *key, struct btrfs_path *p,
2954 int ins_len, int cow);
2955 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2956 struct btrfs_path *p, u64 time_seq);
2957 int btrfs_search_slot_for_read(struct btrfs_root *root,
2958 const struct btrfs_key *key,
2959 struct btrfs_path *p, int find_higher,
2961 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2962 struct btrfs_root *root, struct extent_buffer *parent,
2963 int start_slot, u64 *last_ret,
2964 struct btrfs_key *progress);
2965 void btrfs_release_path(struct btrfs_path *p);
2966 struct btrfs_path *btrfs_alloc_path(void);
2967 void btrfs_free_path(struct btrfs_path *p);
2968 void btrfs_set_path_blocking(struct btrfs_path *p);
2969 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2971 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2972 struct btrfs_path *path, int slot, int nr);
2973 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2974 struct btrfs_root *root,
2975 struct btrfs_path *path)
2977 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2980 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2981 const struct btrfs_key *cpu_key, u32 *data_size,
2982 u32 total_data, u32 total_size, int nr);
2983 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2984 const struct btrfs_key *key, void *data, u32 data_size);
2985 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2986 struct btrfs_root *root,
2987 struct btrfs_path *path,
2988 const struct btrfs_key *cpu_key, u32 *data_size,
2991 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2992 struct btrfs_root *root,
2993 struct btrfs_path *path,
2994 const struct btrfs_key *key,
2997 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3000 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3001 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3002 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3004 static inline int btrfs_next_old_item(struct btrfs_root *root,
3005 struct btrfs_path *p, u64 time_seq)
3008 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3009 return btrfs_next_old_leaf(root, p, time_seq);
3012 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3014 return btrfs_next_old_item(root, p, 0);
3016 int btrfs_leaf_free_space(struct extent_buffer *leaf);
3017 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3018 struct btrfs_block_rsv *block_rsv,
3019 int update_ref, int for_reloc);
3020 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3021 struct btrfs_root *root,
3022 struct extent_buffer *node,
3023 struct extent_buffer *parent);
3024 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3027 * Do it this way so we only ever do one test_bit in the normal case.
3029 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
3030 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
3038 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3039 * anything except sleeping. This function is used to check the status of
3042 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
3044 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
3047 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3049 kfree(fs_info->balance_ctl);
3050 kfree(fs_info->delayed_root);
3051 kfree(fs_info->extent_root);
3052 kfree(fs_info->tree_root);
3053 kfree(fs_info->chunk_root);
3054 kfree(fs_info->dev_root);
3055 kfree(fs_info->csum_root);
3056 kfree(fs_info->quota_root);
3057 kfree(fs_info->uuid_root);
3058 kfree(fs_info->free_space_root);
3059 kfree(fs_info->super_copy);
3060 kfree(fs_info->super_for_commit);
3064 /* tree mod log functions from ctree.c */
3065 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3066 struct seq_list *elem);
3067 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3068 struct seq_list *elem);
3069 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3072 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3073 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3075 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3076 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3078 int btrfs_del_root(struct btrfs_trans_handle *trans,
3079 const struct btrfs_key *key);
3080 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3081 const struct btrfs_key *key,
3082 struct btrfs_root_item *item);
3083 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3084 struct btrfs_root *root,
3085 struct btrfs_key *key,
3086 struct btrfs_root_item *item);
3087 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3088 struct btrfs_path *path, struct btrfs_root_item *root_item,
3089 struct btrfs_key *root_key);
3090 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3091 void btrfs_set_root_node(struct btrfs_root_item *item,
3092 struct extent_buffer *node);
3093 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3094 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3095 struct btrfs_root *root);
3098 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3100 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3102 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3103 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3107 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3108 const char *name, int name_len);
3109 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3110 int name_len, struct btrfs_inode *dir,
3111 struct btrfs_key *location, u8 type, u64 index);
3112 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3113 struct btrfs_root *root,
3114 struct btrfs_path *path, u64 dir,
3115 const char *name, int name_len,
3117 struct btrfs_dir_item *
3118 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3119 struct btrfs_root *root,
3120 struct btrfs_path *path, u64 dir,
3121 u64 objectid, const char *name, int name_len,
3123 struct btrfs_dir_item *
3124 btrfs_search_dir_index_item(struct btrfs_root *root,
3125 struct btrfs_path *path, u64 dirid,
3126 const char *name, int name_len);
3127 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3128 struct btrfs_root *root,
3129 struct btrfs_path *path,
3130 struct btrfs_dir_item *di);
3131 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3132 struct btrfs_root *root,
3133 struct btrfs_path *path, u64 objectid,
3134 const char *name, u16 name_len,
3135 const void *data, u16 data_len);
3136 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3137 struct btrfs_root *root,
3138 struct btrfs_path *path, u64 dir,
3139 const char *name, u16 name_len,
3141 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3142 struct btrfs_path *path,
3147 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3148 struct btrfs_root *root, u64 offset);
3149 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3150 struct btrfs_root *root, u64 offset);
3151 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3154 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3155 struct btrfs_root *root,
3156 const char *name, int name_len,
3157 u64 inode_objectid, u64 ref_objectid, u64 index);
3158 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root,
3160 const char *name, int name_len,
3161 u64 inode_objectid, u64 ref_objectid, u64 *index);
3162 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_path *path, u64 objectid);
3165 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3166 *root, struct btrfs_path *path,
3167 struct btrfs_key *location, int mod);
3169 struct btrfs_inode_extref *
3170 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3171 struct btrfs_root *root,
3172 struct btrfs_path *path,
3173 const char *name, int name_len,
3174 u64 inode_objectid, u64 ref_objectid, int ins_len,
3177 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3179 int name_len, struct btrfs_inode_ref **ref_ret);
3180 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3181 u64 ref_objectid, const char *name,
3183 struct btrfs_inode_extref **extref_ret);
3186 struct btrfs_dio_private;
3187 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3188 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3189 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3190 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3191 u64 logical_offset);
3192 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3193 struct btrfs_root *root,
3194 u64 objectid, u64 pos,
3195 u64 disk_offset, u64 disk_num_bytes,
3196 u64 num_bytes, u64 offset, u64 ram_bytes,
3197 u8 compression, u8 encryption, u16 other_encoding);
3198 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3199 struct btrfs_root *root,
3200 struct btrfs_path *path, u64 objectid,
3201 u64 bytenr, int mod);
3202 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3203 struct btrfs_root *root,
3204 struct btrfs_ordered_sum *sums);
3205 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3206 u64 file_start, int contig);
3207 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3208 struct list_head *list, int search_commit);
3209 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3210 const struct btrfs_path *path,
3211 struct btrfs_file_extent_item *fi,
3212 const bool new_inline,
3213 struct extent_map *em);
3216 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3217 u64 start, u64 len);
3218 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3219 u64 *orig_start, u64 *orig_block_len,
3222 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3223 struct btrfs_inode *inode);
3224 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3225 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3226 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3227 struct btrfs_root *root,
3228 struct btrfs_inode *dir, struct btrfs_inode *inode,
3229 const char *name, int name_len);
3230 int btrfs_add_link(struct btrfs_trans_handle *trans,
3231 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3232 const char *name, int name_len, int add_backref, u64 index);
3233 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3234 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3236 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3237 struct btrfs_root *root,
3238 struct inode *inode, u64 new_size,
3241 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3242 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3243 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3244 unsigned int extra_bits,
3245 struct extent_state **cached_state, int dedupe);
3246 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3247 struct btrfs_root *new_root,
3248 struct btrfs_root *parent_root,
3250 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3252 void btrfs_clear_delalloc_extent(struct inode *inode,
3253 struct extent_state *state, unsigned *bits);
3254 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3255 struct extent_state *other);
3256 void btrfs_split_delalloc_extent(struct inode *inode,
3257 struct extent_state *orig, u64 split);
3258 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3259 unsigned long bio_flags);
3260 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3261 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3262 int btrfs_readpage(struct file *file, struct page *page);
3263 void btrfs_evict_inode(struct inode *inode);
3264 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3265 struct inode *btrfs_alloc_inode(struct super_block *sb);
3266 void btrfs_destroy_inode(struct inode *inode);
3267 void btrfs_free_inode(struct inode *inode);
3268 int btrfs_drop_inode(struct inode *inode);
3269 int __init btrfs_init_cachep(void);
3270 void __cold btrfs_destroy_cachep(void);
3271 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3272 struct btrfs_root *root, int *new,
3273 struct btrfs_path *path);
3274 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3275 struct btrfs_root *root, int *was_new);
3276 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3277 struct page *page, size_t pg_offset,
3278 u64 start, u64 end, int create);
3279 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3280 struct btrfs_root *root,
3281 struct inode *inode);
3282 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3283 struct btrfs_root *root, struct inode *inode);
3284 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3285 struct btrfs_inode *inode);
3286 int btrfs_orphan_cleanup(struct btrfs_root *root);
3287 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3288 void btrfs_add_delayed_iput(struct inode *inode);
3289 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3290 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3291 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3292 u64 start, u64 num_bytes, u64 min_size,
3293 loff_t actual_len, u64 *alloc_hint);
3294 int btrfs_prealloc_file_range_trans(struct inode *inode,
3295 struct btrfs_trans_handle *trans, int mode,
3296 u64 start, u64 num_bytes, u64 min_size,
3297 loff_t actual_len, u64 *alloc_hint);
3298 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
3299 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3300 struct writeback_control *wbc);
3301 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3302 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3303 u64 end, int uptodate);
3304 extern const struct dentry_operations btrfs_dentry_operations;
3307 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3308 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3309 int btrfs_ioctl_get_supported_features(void __user *arg);
3310 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3311 int btrfs_is_empty_uuid(u8 *uuid);
3312 int btrfs_defrag_file(struct inode *inode, struct file *file,
3313 struct btrfs_ioctl_defrag_range_args *range,
3314 u64 newer_than, unsigned long max_pages);
3315 void btrfs_get_block_group_info(struct list_head *groups_list,
3316 struct btrfs_ioctl_space_info *space);
3317 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3318 struct btrfs_ioctl_balance_args *bargs);
3321 int __init btrfs_auto_defrag_init(void);
3322 void __cold btrfs_auto_defrag_exit(void);
3323 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3324 struct btrfs_inode *inode);
3325 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3326 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3327 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3328 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3330 extern const struct file_operations btrfs_file_operations;
3331 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3332 struct btrfs_root *root, struct inode *inode,
3333 struct btrfs_path *path, u64 start, u64 end,
3334 u64 *drop_end, int drop_cache,
3336 u32 extent_item_size,
3338 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3339 struct btrfs_root *root, struct inode *inode, u64 start,
3340 u64 end, int drop_cache);
3341 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3342 struct btrfs_inode *inode, u64 start, u64 end);
3343 int btrfs_release_file(struct inode *inode, struct file *file);
3344 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3345 size_t num_pages, loff_t pos, size_t write_bytes,
3346 struct extent_state **cached);
3347 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3348 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
3349 struct file *file_out, loff_t pos_out,
3350 loff_t len, unsigned int remap_flags);
3353 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3354 struct btrfs_root *root);
3357 int __init btrfs_init_sysfs(void);
3358 void __cold btrfs_exit_sysfs(void);
3359 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3360 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3363 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3364 unsigned long new_flags);
3365 int btrfs_sync_fs(struct super_block *sb, int wait);
3367 static inline __printf(2, 3) __cold
3368 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3372 #ifdef CONFIG_PRINTK
3375 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3377 #define btrfs_printk(fs_info, fmt, args...) \
3378 btrfs_no_printk(fs_info, fmt, ##args)
3381 #define btrfs_emerg(fs_info, fmt, args...) \
3382 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3383 #define btrfs_alert(fs_info, fmt, args...) \
3384 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3385 #define btrfs_crit(fs_info, fmt, args...) \
3386 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3387 #define btrfs_err(fs_info, fmt, args...) \
3388 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3389 #define btrfs_warn(fs_info, fmt, args...) \
3390 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3391 #define btrfs_notice(fs_info, fmt, args...) \
3392 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3393 #define btrfs_info(fs_info, fmt, args...) \
3394 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3397 * Wrappers that use printk_in_rcu
3399 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3400 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3401 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3402 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3403 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3404 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3405 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3406 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3407 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3408 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3409 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3410 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3411 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3412 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3415 * Wrappers that use a ratelimited printk_in_rcu
3417 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3418 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3419 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3420 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3421 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3422 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3423 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3424 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3425 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3426 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3427 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3428 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3429 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3430 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3433 * Wrappers that use a ratelimited printk
3435 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3436 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3437 #define btrfs_alert_rl(fs_info, fmt, args...) \
3438 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3439 #define btrfs_crit_rl(fs_info, fmt, args...) \
3440 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3441 #define btrfs_err_rl(fs_info, fmt, args...) \
3442 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3443 #define btrfs_warn_rl(fs_info, fmt, args...) \
3444 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3445 #define btrfs_notice_rl(fs_info, fmt, args...) \
3446 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3447 #define btrfs_info_rl(fs_info, fmt, args...) \
3448 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3450 #if defined(CONFIG_DYNAMIC_DEBUG)
3451 #define btrfs_debug(fs_info, fmt, args...) \
3452 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3453 fs_info, KERN_DEBUG fmt, ##args)
3454 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3455 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3456 fs_info, KERN_DEBUG fmt, ##args)
3457 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3458 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3459 fs_info, KERN_DEBUG fmt, ##args)
3460 #define btrfs_debug_rl(fs_info, fmt, args...) \
3461 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3462 fs_info, KERN_DEBUG fmt, ##args)
3463 #elif defined(DEBUG)
3464 #define btrfs_debug(fs_info, fmt, args...) \
3465 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3466 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3467 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3468 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3469 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3470 #define btrfs_debug_rl(fs_info, fmt, args...) \
3471 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3473 #define btrfs_debug(fs_info, fmt, args...) \
3474 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3475 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3476 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3477 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3478 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3479 #define btrfs_debug_rl(fs_info, fmt, args...) \
3480 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3483 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3486 btrfs_printk(fs_info, fmt, ##args); \
3487 rcu_read_unlock(); \
3490 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3493 btrfs_no_printk(fs_info, fmt, ##args); \
3494 rcu_read_unlock(); \
3497 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3499 static DEFINE_RATELIMIT_STATE(_rs, \
3500 DEFAULT_RATELIMIT_INTERVAL, \
3501 DEFAULT_RATELIMIT_BURST); \
3502 if (__ratelimit(&_rs)) \
3503 btrfs_printk(fs_info, fmt, ##args); \
3506 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3509 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3510 rcu_read_unlock(); \
3514 static inline void assfail(const char *expr, const char *file, int line)
3516 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3517 pr_err("assertion failed: %s, file: %s, line: %d\n",
3523 #define ASSERT(expr) \
3524 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3527 * Use that for functions that are conditionally exported for sanity tests but
3530 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3531 #define EXPORT_FOR_TESTS static
3533 #define EXPORT_FOR_TESTS
3537 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3540 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3545 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3546 unsigned int line, int errno, const char *fmt, ...);
3548 const char *btrfs_decode_error(int errno);
3551 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3552 const char *function,
3553 unsigned int line, int errno);
3556 * Call btrfs_abort_transaction as early as possible when an error condition is
3557 * detected, that way the exact line number is reported.
3559 #define btrfs_abort_transaction(trans, errno) \
3561 /* Report first abort since mount */ \
3562 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3563 &((trans)->fs_info->fs_state))) { \
3564 if ((errno) != -EIO) { \
3565 WARN(1, KERN_DEBUG \
3566 "BTRFS: Transaction aborted (error %d)\n", \
3569 btrfs_debug((trans)->fs_info, \
3570 "Transaction aborted (error %d)", \
3574 __btrfs_abort_transaction((trans), __func__, \
3575 __LINE__, (errno)); \
3578 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3580 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3581 (errno), fmt, ##args); \
3586 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3587 unsigned int line, int errno, const char *fmt, ...);
3589 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3590 * will panic(). Otherwise we BUG() here.
3592 #define btrfs_panic(fs_info, errno, fmt, args...) \
3594 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3599 /* compatibility and incompatibility defines */
3601 #define btrfs_set_fs_incompat(__fs_info, opt) \
3602 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3604 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3607 struct btrfs_super_block *disk_super;
3610 disk_super = fs_info->super_copy;
3611 features = btrfs_super_incompat_flags(disk_super);
3612 if (!(features & flag)) {
3613 spin_lock(&fs_info->super_lock);
3614 features = btrfs_super_incompat_flags(disk_super);
3615 if (!(features & flag)) {
3617 btrfs_set_super_incompat_flags(disk_super, features);
3618 btrfs_info(fs_info, "setting %llu feature flag",
3621 spin_unlock(&fs_info->super_lock);
3625 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3626 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3628 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3631 struct btrfs_super_block *disk_super;
3634 disk_super = fs_info->super_copy;
3635 features = btrfs_super_incompat_flags(disk_super);
3636 if (features & flag) {
3637 spin_lock(&fs_info->super_lock);
3638 features = btrfs_super_incompat_flags(disk_super);
3639 if (features & flag) {
3641 btrfs_set_super_incompat_flags(disk_super, features);
3642 btrfs_info(fs_info, "clearing %llu feature flag",
3645 spin_unlock(&fs_info->super_lock);
3649 #define btrfs_fs_incompat(fs_info, opt) \
3650 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3652 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3654 struct btrfs_super_block *disk_super;
3655 disk_super = fs_info->super_copy;
3656 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3659 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3660 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3662 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3665 struct btrfs_super_block *disk_super;
3668 disk_super = fs_info->super_copy;
3669 features = btrfs_super_compat_ro_flags(disk_super);
3670 if (!(features & flag)) {
3671 spin_lock(&fs_info->super_lock);
3672 features = btrfs_super_compat_ro_flags(disk_super);
3673 if (!(features & flag)) {
3675 btrfs_set_super_compat_ro_flags(disk_super, features);
3676 btrfs_info(fs_info, "setting %llu ro feature flag",
3679 spin_unlock(&fs_info->super_lock);
3683 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3684 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3686 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3689 struct btrfs_super_block *disk_super;
3692 disk_super = fs_info->super_copy;
3693 features = btrfs_super_compat_ro_flags(disk_super);
3694 if (features & flag) {
3695 spin_lock(&fs_info->super_lock);
3696 features = btrfs_super_compat_ro_flags(disk_super);
3697 if (features & flag) {
3699 btrfs_set_super_compat_ro_flags(disk_super, features);
3700 btrfs_info(fs_info, "clearing %llu ro feature flag",
3703 spin_unlock(&fs_info->super_lock);
3707 #define btrfs_fs_compat_ro(fs_info, opt) \
3708 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3710 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3712 struct btrfs_super_block *disk_super;
3713 disk_super = fs_info->super_copy;
3714 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3718 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3719 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3720 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3721 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3722 struct inode *inode, struct inode *dir);
3724 #define btrfs_get_acl NULL
3725 #define btrfs_set_acl NULL
3726 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3727 struct inode *inode, struct inode *dir)
3734 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3735 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3736 struct btrfs_root *root);
3737 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3738 struct btrfs_root *root);
3739 int btrfs_recover_relocation(struct btrfs_root *root);
3740 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3741 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3742 struct btrfs_root *root, struct extent_buffer *buf,
3743 struct extent_buffer *cow);
3744 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3745 u64 *bytes_to_reserve);
3746 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3747 struct btrfs_pending_snapshot *pending);
3750 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3751 u64 end, struct btrfs_scrub_progress *progress,
3752 int readonly, int is_dev_replace);
3753 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3754 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3755 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3756 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3757 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3758 struct btrfs_scrub_progress *progress);
3759 static inline void btrfs_init_full_stripe_locks_tree(
3760 struct btrfs_full_stripe_locks_tree *locks_root)
3762 locks_root->root = RB_ROOT;
3763 mutex_init(&locks_root->lock);
3767 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3768 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3769 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3771 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3773 btrfs_bio_counter_sub(fs_info, 1);
3777 struct reada_control {
3778 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3779 struct btrfs_key key_start;
3780 struct btrfs_key key_end; /* exclusive */
3783 wait_queue_head_t wait;
3785 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3786 struct btrfs_key *start, struct btrfs_key *end);
3787 int btrfs_reada_wait(void *handle);
3788 void btrfs_reada_detach(void *handle);
3789 int btree_readahead_hook(struct extent_buffer *eb, int err);
3791 static inline int is_fstree(u64 rootid)
3793 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3794 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3795 !btrfs_qgroup_level(rootid)))
3800 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3802 return signal_pending(current);
3805 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3807 /* Sanity test specific functions */
3808 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3809 void btrfs_test_inode_set_ops(struct inode *inode);
3810 void btrfs_test_destroy_inode(struct inode *inode);
3812 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3814 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3817 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3823 static inline void cond_wake_up(struct wait_queue_head *wq)
3826 * This implies a full smp_mb barrier, see comments for
3827 * waitqueue_active why.
3829 if (wq_has_sleeper(wq))
3833 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3836 * Special case for conditional wakeup where the barrier required for
3837 * waitqueue_active is implied by some of the preceding code. Eg. one
3838 * of such atomic operations (atomic_dec_and_return, ...), or a
3839 * unlock/lock sequence, etc.
3841 if (waitqueue_active(wq))