1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <linux/kobject.h>
20 #include <trace/events/btrfs.h>
21 #include <asm/kmap_types.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle;
36 struct btrfs_transaction;
37 struct btrfs_pending_snapshot;
38 extern struct kmem_cache *btrfs_trans_handle_cachep;
39 extern struct kmem_cache *btrfs_bit_radix_cachep;
40 extern struct kmem_cache *btrfs_path_cachep;
41 extern struct kmem_cache *btrfs_free_space_cachep;
42 struct btrfs_ordered_sum;
44 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
45 #define STATIC noinline
47 #define STATIC static noinline
50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
52 #define BTRFS_MAX_MIRRORS 3
54 #define BTRFS_MAX_LEVEL 8
56 #define BTRFS_OLDEST_GENERATION 0ULL
59 * the max metadata block size. This limit is somewhat artificial,
60 * but the memmove costs go through the roof for larger blocks.
62 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
65 * we can actually store much bigger names, but lets not confuse the rest
68 #define BTRFS_NAME_LEN 255
71 * Theoretical limit is larger, but we keep this down to a sane
72 * value. That should limit greatly the possibility of collisions on
75 #define BTRFS_LINK_MAX 65535U
77 /* four bytes for CRC32 */
78 static const int btrfs_csum_sizes[] = { 4 };
80 #define BTRFS_EMPTY_DIR_SIZE 0
82 /* ioprio of readahead is set to idle */
83 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
85 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
88 * Use large batch size to reduce overhead of metadata updates. On the reader
89 * side, we only read it when we are close to ENOSPC and the read overhead is
90 * mostly related to the number of CPUs, so it is OK to use arbitrary large
93 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
95 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
99 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
101 static inline u32 count_max_extents(u64 size)
103 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
106 struct btrfs_mapping_tree {
107 struct extent_map_tree map_tree;
110 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
112 BUG_ON(num_stripes == 0);
113 return sizeof(struct btrfs_chunk) +
114 sizeof(struct btrfs_stripe) * (num_stripes - 1);
120 #define BTRFS_FS_STATE_ERROR 0
121 #define BTRFS_FS_STATE_REMOUNTING 1
122 #define BTRFS_FS_STATE_TRANS_ABORTED 2
123 #define BTRFS_FS_STATE_DEV_REPLACING 3
124 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
126 #define BTRFS_BACKREF_REV_MAX 256
127 #define BTRFS_BACKREF_REV_SHIFT 56
128 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
129 BTRFS_BACKREF_REV_SHIFT)
131 #define BTRFS_OLD_BACKREF_REV 0
132 #define BTRFS_MIXED_BACKREF_REV 1
135 * every tree block (leaf or node) starts with this header.
137 struct btrfs_header {
138 /* these first four must match the super block */
139 u8 csum[BTRFS_CSUM_SIZE];
140 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
141 __le64 bytenr; /* which block this node is supposed to live in */
144 /* allowed to be different from the super from here on down */
145 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
150 } __attribute__ ((__packed__));
153 * this is a very generous portion of the super block, giving us
154 * room to translate 14 chunks with 3 stripes each.
156 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
159 * just in case we somehow lose the roots and are not able to mount,
160 * we store an array of the roots from previous transactions
163 #define BTRFS_NUM_BACKUP_ROOTS 4
164 struct btrfs_root_backup {
166 __le64 tree_root_gen;
169 __le64 chunk_root_gen;
172 __le64 extent_root_gen;
181 __le64 csum_root_gen;
191 u8 extent_root_level;
195 /* future and to align */
197 } __attribute__ ((__packed__));
200 * the super block basically lists the main trees of the FS
201 * it currently lacks any block count etc etc
203 struct btrfs_super_block {
204 u8 csum[BTRFS_CSUM_SIZE];
205 /* the first 4 fields must match struct btrfs_header */
206 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
207 __le64 bytenr; /* this block number */
210 /* allowed to be different from the btrfs_header from here own down */
217 /* this will help find the new super based on the log root */
218 __le64 log_root_transid;
221 __le64 root_dir_objectid;
225 __le32 __unused_leafsize;
227 __le32 sys_chunk_array_size;
228 __le64 chunk_root_generation;
230 __le64 compat_ro_flags;
231 __le64 incompat_flags;
236 struct btrfs_dev_item dev_item;
238 char label[BTRFS_LABEL_SIZE];
240 __le64 cache_generation;
241 __le64 uuid_tree_generation;
243 /* future expansion */
245 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
246 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
247 } __attribute__ ((__packed__));
250 * Compat flags that we support. If any incompat flags are set other than the
251 * ones specified below then we will fail to mount
253 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
254 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
255 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
257 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
258 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
259 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
261 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
262 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
264 #define BTRFS_FEATURE_INCOMPAT_SUPP \
265 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
266 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
267 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
268 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
269 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
270 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
271 BTRFS_FEATURE_INCOMPAT_RAID56 | \
272 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
273 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
274 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
276 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
277 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
278 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
281 * A leaf is full of items. offset and size tell us where to find
282 * the item in the leaf (relative to the start of the data area)
285 struct btrfs_disk_key key;
288 } __attribute__ ((__packed__));
291 * leaves have an item area and a data area:
292 * [item0, item1....itemN] [free space] [dataN...data1, data0]
294 * The data is separate from the items to get the keys closer together
298 struct btrfs_header header;
299 struct btrfs_item items[];
300 } __attribute__ ((__packed__));
303 * all non-leaf blocks are nodes, they hold only keys and pointers to
306 struct btrfs_key_ptr {
307 struct btrfs_disk_key key;
310 } __attribute__ ((__packed__));
313 struct btrfs_header header;
314 struct btrfs_key_ptr ptrs[];
315 } __attribute__ ((__packed__));
318 * btrfs_paths remember the path taken from the root down to the leaf.
319 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
320 * to any other levels that are present.
322 * The slots array records the index of the item or block pointer
323 * used while walking the tree.
325 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
327 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
328 int slots[BTRFS_MAX_LEVEL];
329 /* if there is real range locking, this locks field will change */
330 u8 locks[BTRFS_MAX_LEVEL];
332 /* keep some upper locks as we walk down */
336 * set by btrfs_split_item, tells search_slot to keep all locks
337 * and to force calls to keep space in the nodes
339 unsigned int search_for_split:1;
340 unsigned int keep_locks:1;
341 unsigned int skip_locking:1;
342 unsigned int leave_spinning:1;
343 unsigned int search_commit_root:1;
344 unsigned int need_commit_sem:1;
345 unsigned int skip_release_on_error:1;
347 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
348 sizeof(struct btrfs_item))
349 struct btrfs_dev_replace {
350 u64 replace_state; /* see #define above */
351 time64_t time_started; /* seconds since 1-Jan-1970 */
352 time64_t time_stopped; /* seconds since 1-Jan-1970 */
353 atomic64_t num_write_errors;
354 atomic64_t num_uncorrectable_read_errors;
357 u64 committed_cursor_left;
358 u64 cursor_left_last_write_of_item;
361 u64 cont_reading_from_srcdev_mode; /* see #define above */
364 int item_needs_writeback;
365 struct btrfs_device *srcdev;
366 struct btrfs_device *tgtdev;
369 atomic_t nesting_level;
370 struct mutex lock_finishing_cancel_unmount;
373 atomic_t blocking_readers;
374 wait_queue_head_t read_lock_wq;
376 struct btrfs_scrub_progress scrub_progress;
379 /* For raid type sysfs entries */
380 struct raid_kobject {
383 struct list_head list;
386 struct btrfs_space_info {
389 u64 total_bytes; /* total bytes in the space,
390 this doesn't take mirrors into account */
391 u64 bytes_used; /* total bytes used,
392 this doesn't take mirrors into account */
393 u64 bytes_pinned; /* total bytes pinned, will be freed when the
394 transaction finishes */
395 u64 bytes_reserved; /* total bytes the allocator has reserved for
396 current allocations */
397 u64 bytes_may_use; /* number of bytes that may be used for
398 delalloc/allocations */
399 u64 bytes_readonly; /* total bytes that are read only */
401 u64 max_extent_size; /* This will hold the maximum extent size of
402 the space info if we had an ENOSPC in the
405 unsigned int full:1; /* indicates that we cannot allocate any more
406 chunks for this space */
407 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
409 unsigned int flush:1; /* set if we are trying to make space */
411 unsigned int force_alloc; /* set if we need to force a chunk
412 alloc for this space */
414 u64 disk_used; /* total bytes used on disk */
415 u64 disk_total; /* total bytes on disk, takes mirrors into
421 * bytes_pinned is kept in line with what is actually pinned, as in
422 * we've called update_block_group and dropped the bytes_used counter
423 * and increased the bytes_pinned counter. However this means that
424 * bytes_pinned does not reflect the bytes that will be pinned once the
425 * delayed refs are flushed, so this counter is inc'ed every time we
426 * call btrfs_free_extent so it is a realtime count of what will be
427 * freed once the transaction is committed. It will be zeroed every
428 * time the transaction commits.
430 struct percpu_counter total_bytes_pinned;
432 struct list_head list;
433 /* Protected by the spinlock 'lock'. */
434 struct list_head ro_bgs;
435 struct list_head priority_tickets;
436 struct list_head tickets;
438 * tickets_id just indicates the next ticket will be handled, so note
439 * it's not stored per ticket.
443 struct rw_semaphore groups_sem;
444 /* for block groups in our same type */
445 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
446 wait_queue_head_t wait;
449 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
452 #define BTRFS_BLOCK_RSV_GLOBAL 1
453 #define BTRFS_BLOCK_RSV_DELALLOC 2
454 #define BTRFS_BLOCK_RSV_TRANS 3
455 #define BTRFS_BLOCK_RSV_CHUNK 4
456 #define BTRFS_BLOCK_RSV_DELOPS 5
457 #define BTRFS_BLOCK_RSV_EMPTY 6
458 #define BTRFS_BLOCK_RSV_TEMP 7
460 struct btrfs_block_rsv {
463 struct btrfs_space_info *space_info;
467 unsigned short failfast;
470 * Qgroup equivalent for @size @reserved
472 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
473 * about things like csum size nor how many tree blocks it will need to
476 * Qgroup cares more about net change of the extent usage.
478 * So for one newly inserted file extent, in worst case it will cause
479 * leaf split and level increase, nodesize for each file extent is
482 * In short, qgroup_size/reserved is the upper limit of possible needed
483 * qgroup metadata reservation.
486 u64 qgroup_rsv_reserved;
490 * free clusters are used to claim free space in relatively large chunks,
491 * allowing us to do less seeky writes. They are used for all metadata
492 * allocations. In ssd_spread mode they are also used for data allocations.
494 struct btrfs_free_cluster {
496 spinlock_t refill_lock;
499 /* largest extent in this cluster */
502 /* first extent starting offset */
505 /* We did a full search and couldn't create a cluster */
508 struct btrfs_block_group_cache *block_group;
510 * when a cluster is allocated from a block group, we put the
511 * cluster onto a list in the block group so that it can
512 * be freed before the block group is freed.
514 struct list_head block_group_list;
517 enum btrfs_caching_type {
519 BTRFS_CACHE_STARTED = 1,
520 BTRFS_CACHE_FAST = 2,
521 BTRFS_CACHE_FINISHED = 3,
522 BTRFS_CACHE_ERROR = 4,
525 enum btrfs_disk_cache_state {
526 BTRFS_DC_WRITTEN = 0,
532 struct btrfs_caching_control {
533 struct list_head list;
535 wait_queue_head_t wait;
536 struct btrfs_work work;
537 struct btrfs_block_group_cache *block_group;
542 /* Once caching_thread() finds this much free space, it will wake up waiters. */
543 #define CACHING_CTL_WAKE_UP SZ_2M
545 struct btrfs_io_ctl {
549 struct btrfs_fs_info *fs_info;
556 unsigned check_crcs:1;
560 * Tree to record all locked full stripes of a RAID5/6 block group
562 struct btrfs_full_stripe_locks_tree {
567 struct btrfs_block_group_cache {
568 struct btrfs_key key;
569 struct btrfs_block_group_item item;
570 struct btrfs_fs_info *fs_info;
578 u64 cache_generation;
581 * If the free space extent count exceeds this number, convert the block
584 u32 bitmap_high_thresh;
587 * If the free space extent count drops below this number, convert the
588 * block group back to extents.
590 u32 bitmap_low_thresh;
593 * It is just used for the delayed data space allocation because
594 * only the data space allocation and the relative metadata update
595 * can be done cross the transaction.
597 struct rw_semaphore data_rwsem;
599 /* for raid56, this is a full stripe, without parity */
600 unsigned long full_stripe_len;
604 unsigned int has_caching_ctl:1;
605 unsigned int removed:1;
607 int disk_cache_state;
609 /* cache tracking stuff */
611 struct btrfs_caching_control *caching_ctl;
612 u64 last_byte_to_unpin;
614 struct btrfs_space_info *space_info;
616 /* free space cache stuff */
617 struct btrfs_free_space_ctl *free_space_ctl;
619 /* block group cache stuff */
620 struct rb_node cache_node;
622 /* for block groups in the same raid type */
623 struct list_head list;
628 /* List of struct btrfs_free_clusters for this block group.
629 * Today it will only have one thing on it, but that may change
631 struct list_head cluster_list;
633 /* For delayed block group creation or deletion of empty block groups */
634 struct list_head bg_list;
636 /* For read-only block groups */
637 struct list_head ro_list;
641 /* For dirty block groups */
642 struct list_head dirty_list;
643 struct list_head io_list;
645 struct btrfs_io_ctl io_ctl;
648 * Incremented when doing extent allocations and holding a read lock
649 * on the space_info's groups_sem semaphore.
650 * Decremented when an ordered extent that represents an IO against this
651 * block group's range is created (after it's added to its inode's
652 * root's list of ordered extents) or immediately after the allocation
653 * if it's a metadata extent or fallocate extent (for these cases we
654 * don't create ordered extents).
656 atomic_t reservations;
659 * Incremented while holding the spinlock *lock* by a task checking if
660 * it can perform a nocow write (incremented if the value for the *ro*
661 * field is 0). Decremented by such tasks once they create an ordered
662 * extent or before that if some error happens before reaching that step.
663 * This is to prevent races between block group relocation and nocow
664 * writes through direct IO.
666 atomic_t nocow_writers;
668 /* Lock for free space tree operations. */
669 struct mutex free_space_lock;
672 * Does the block group need to be added to the free space tree?
673 * Protected by free_space_lock.
675 int needs_free_space;
677 /* Record locked full stripes for RAID5/6 block group */
678 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
681 /* delayed seq elem */
683 struct list_head list;
687 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
689 #define SEQ_LAST ((u64)-1)
691 enum btrfs_orphan_cleanup_state {
692 ORPHAN_CLEANUP_STARTED = 1,
693 ORPHAN_CLEANUP_DONE = 2,
696 /* used by the raid56 code to lock stripes for read/modify/write */
697 struct btrfs_stripe_hash {
698 struct list_head hash_list;
702 /* used by the raid56 code to lock stripes for read/modify/write */
703 struct btrfs_stripe_hash_table {
704 struct list_head stripe_cache;
705 spinlock_t cache_lock;
707 struct btrfs_stripe_hash table[];
710 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
712 void btrfs_init_async_reclaim_work(struct work_struct *work);
715 struct reloc_control;
717 struct btrfs_fs_devices;
718 struct btrfs_balance_control;
719 struct btrfs_delayed_root;
721 #define BTRFS_FS_BARRIER 1
722 #define BTRFS_FS_CLOSING_START 2
723 #define BTRFS_FS_CLOSING_DONE 3
724 #define BTRFS_FS_LOG_RECOVERING 4
725 #define BTRFS_FS_OPEN 5
726 #define BTRFS_FS_QUOTA_ENABLED 6
727 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
728 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
729 #define BTRFS_FS_BTREE_ERR 11
730 #define BTRFS_FS_LOG1_ERR 12
731 #define BTRFS_FS_LOG2_ERR 13
732 #define BTRFS_FS_QUOTA_OVERRIDE 14
733 /* Used to record internally whether fs has been frozen */
734 #define BTRFS_FS_FROZEN 15
737 * Indicate that a whole-filesystem exclusive operation is running
738 * (device replace, resize, device add/delete, balance)
740 #define BTRFS_FS_EXCL_OP 16
743 * To info transaction_kthread we need an immediate commit so it doesn't
744 * need to wait for commit_interval
746 #define BTRFS_FS_NEED_ASYNC_COMMIT 17
749 * Indicate that balance has been set up from the ioctl and is in the main
750 * phase. The fs_info::balance_ctl is initialized.
752 #define BTRFS_FS_BALANCE_RUNNING 18
754 struct btrfs_fs_info {
755 u8 fsid[BTRFS_FSID_SIZE];
756 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
758 struct btrfs_root *extent_root;
759 struct btrfs_root *tree_root;
760 struct btrfs_root *chunk_root;
761 struct btrfs_root *dev_root;
762 struct btrfs_root *fs_root;
763 struct btrfs_root *csum_root;
764 struct btrfs_root *quota_root;
765 struct btrfs_root *uuid_root;
766 struct btrfs_root *free_space_root;
768 /* the log root tree is a directory of all the other log roots */
769 struct btrfs_root *log_root_tree;
771 spinlock_t fs_roots_radix_lock;
772 struct radix_tree_root fs_roots_radix;
774 /* block group cache stuff */
775 spinlock_t block_group_cache_lock;
776 u64 first_logical_byte;
777 struct rb_root block_group_cache_tree;
779 /* keep track of unallocated space */
780 atomic64_t free_chunk_space;
782 struct extent_io_tree freed_extents[2];
783 struct extent_io_tree *pinned_extents;
785 /* logical->physical extent mapping */
786 struct btrfs_mapping_tree mapping_tree;
789 * block reservation for extent, checksum, root tree and
790 * delayed dir index item
792 struct btrfs_block_rsv global_block_rsv;
793 /* block reservation for metadata operations */
794 struct btrfs_block_rsv trans_block_rsv;
795 /* block reservation for chunk tree */
796 struct btrfs_block_rsv chunk_block_rsv;
797 /* block reservation for delayed operations */
798 struct btrfs_block_rsv delayed_block_rsv;
800 struct btrfs_block_rsv empty_block_rsv;
803 u64 last_trans_committed;
804 u64 avg_delayed_ref_runtime;
807 * this is updated to the current trans every time a full commit
808 * is required instead of the faster short fsync log commits
810 u64 last_trans_log_full_commit;
811 unsigned long mount_opt;
813 * Track requests for actions that need to be done during transaction
814 * commit (like for some mount options).
816 unsigned long pending_changes;
817 unsigned long compress_type:4;
818 unsigned int compress_level;
821 * It is a suggestive number, the read side is safe even it gets a
822 * wrong number because we will write out the data into a regular
823 * extent. The write side(mount/remount) is under ->s_umount lock,
824 * so it is also safe.
828 struct btrfs_transaction *running_transaction;
829 wait_queue_head_t transaction_throttle;
830 wait_queue_head_t transaction_wait;
831 wait_queue_head_t transaction_blocked_wait;
832 wait_queue_head_t async_submit_wait;
835 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
836 * when they are updated.
838 * Because we do not clear the flags for ever, so we needn't use
839 * the lock on the read side.
841 * We also needn't use the lock when we mount the fs, because
842 * there is no other task which will update the flag.
844 spinlock_t super_lock;
845 struct btrfs_super_block *super_copy;
846 struct btrfs_super_block *super_for_commit;
847 struct super_block *sb;
848 struct inode *btree_inode;
849 struct mutex tree_log_mutex;
850 struct mutex transaction_kthread_mutex;
851 struct mutex cleaner_mutex;
852 struct mutex chunk_mutex;
855 * this is taken to make sure we don't set block groups ro after
856 * the free space cache has been allocated on them
858 struct mutex ro_block_group_mutex;
860 /* this is used during read/modify/write to make sure
861 * no two ios are trying to mod the same stripe at the same
864 struct btrfs_stripe_hash_table *stripe_hash_table;
867 * this protects the ordered operations list only while we are
868 * processing all of the entries on it. This way we make
869 * sure the commit code doesn't find the list temporarily empty
870 * because another function happens to be doing non-waiting preflush
871 * before jumping into the main commit.
873 struct mutex ordered_operations_mutex;
875 struct rw_semaphore commit_root_sem;
877 struct rw_semaphore cleanup_work_sem;
879 struct rw_semaphore subvol_sem;
880 struct srcu_struct subvol_srcu;
882 spinlock_t trans_lock;
884 * the reloc mutex goes with the trans lock, it is taken
885 * during commit to protect us from the relocation code
887 struct mutex reloc_mutex;
889 struct list_head trans_list;
890 struct list_head dead_roots;
891 struct list_head caching_block_groups;
893 spinlock_t delayed_iput_lock;
894 struct list_head delayed_iputs;
895 struct mutex cleaner_delayed_iput_mutex;
897 /* this protects tree_mod_seq_list */
898 spinlock_t tree_mod_seq_lock;
899 atomic64_t tree_mod_seq;
900 struct list_head tree_mod_seq_list;
902 /* this protects tree_mod_log */
903 rwlock_t tree_mod_log_lock;
904 struct rb_root tree_mod_log;
906 atomic_t async_delalloc_pages;
909 * this is used to protect the following list -- ordered_roots.
911 spinlock_t ordered_root_lock;
914 * all fs/file tree roots in which there are data=ordered extents
915 * pending writeback are added into this list.
917 * these can span multiple transactions and basically include
918 * every dirty data page that isn't from nodatacow
920 struct list_head ordered_roots;
922 struct mutex delalloc_root_mutex;
923 spinlock_t delalloc_root_lock;
924 /* all fs/file tree roots that have delalloc inodes. */
925 struct list_head delalloc_roots;
928 * there is a pool of worker threads for checksumming during writes
929 * and a pool for checksumming after reads. This is because readers
930 * can run with FS locks held, and the writers may be waiting for
931 * those locks. We don't want ordering in the pending list to cause
932 * deadlocks, and so the two are serviced separately.
934 * A third pool does submit_bio to avoid deadlocking with the other
937 struct btrfs_workqueue *workers;
938 struct btrfs_workqueue *delalloc_workers;
939 struct btrfs_workqueue *flush_workers;
940 struct btrfs_workqueue *endio_workers;
941 struct btrfs_workqueue *endio_meta_workers;
942 struct btrfs_workqueue *endio_raid56_workers;
943 struct btrfs_workqueue *endio_repair_workers;
944 struct btrfs_workqueue *rmw_workers;
945 struct btrfs_workqueue *endio_meta_write_workers;
946 struct btrfs_workqueue *endio_write_workers;
947 struct btrfs_workqueue *endio_freespace_worker;
948 struct btrfs_workqueue *submit_workers;
949 struct btrfs_workqueue *caching_workers;
950 struct btrfs_workqueue *readahead_workers;
953 * fixup workers take dirty pages that didn't properly go through
954 * the cow mechanism and make them safe to write. It happens
955 * for the sys_munmap function call path
957 struct btrfs_workqueue *fixup_workers;
958 struct btrfs_workqueue *delayed_workers;
960 /* the extent workers do delayed refs on the extent allocation tree */
961 struct btrfs_workqueue *extent_workers;
962 struct task_struct *transaction_kthread;
963 struct task_struct *cleaner_kthread;
964 u32 thread_pool_size;
966 struct kobject *space_info_kobj;
967 struct list_head pending_raid_kobjs;
968 spinlock_t pending_raid_kobjs_lock; /* uncontended */
972 /* used to keep from writing metadata until there is a nice batch */
973 struct percpu_counter dirty_metadata_bytes;
974 struct percpu_counter delalloc_bytes;
975 s32 dirty_metadata_batch;
978 struct list_head dirty_cowonly_roots;
980 struct btrfs_fs_devices *fs_devices;
983 * The space_info list is effectively read only after initial
984 * setup. It is populated at mount time and cleaned up after
985 * all block groups are removed. RCU is used to protect it.
987 struct list_head space_info;
989 struct btrfs_space_info *data_sinfo;
991 struct reloc_control *reloc_ctl;
993 /* data_alloc_cluster is only used in ssd_spread mode */
994 struct btrfs_free_cluster data_alloc_cluster;
996 /* all metadata allocations go through this cluster */
997 struct btrfs_free_cluster meta_alloc_cluster;
999 /* auto defrag inodes go here */
1000 spinlock_t defrag_inodes_lock;
1001 struct rb_root defrag_inodes;
1002 atomic_t defrag_running;
1004 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1005 seqlock_t profiles_lock;
1007 * these three are in extended format (availability of single
1008 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1009 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1011 u64 avail_data_alloc_bits;
1012 u64 avail_metadata_alloc_bits;
1013 u64 avail_system_alloc_bits;
1015 /* restriper state */
1016 spinlock_t balance_lock;
1017 struct mutex balance_mutex;
1018 atomic_t balance_pause_req;
1019 atomic_t balance_cancel_req;
1020 struct btrfs_balance_control *balance_ctl;
1021 wait_queue_head_t balance_wait_q;
1023 u32 data_chunk_allocations;
1028 /* private scrub information */
1029 struct mutex scrub_lock;
1030 atomic_t scrubs_running;
1031 atomic_t scrub_pause_req;
1032 atomic_t scrubs_paused;
1033 atomic_t scrub_cancel_req;
1034 wait_queue_head_t scrub_pause_wait;
1035 int scrub_workers_refcnt;
1036 struct btrfs_workqueue *scrub_workers;
1037 struct btrfs_workqueue *scrub_wr_completion_workers;
1038 struct btrfs_workqueue *scrub_nocow_workers;
1039 struct btrfs_workqueue *scrub_parity_workers;
1041 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1042 u32 check_integrity_print_mask;
1044 /* is qgroup tracking in a consistent state? */
1047 /* holds configuration and tracking. Protected by qgroup_lock */
1048 struct rb_root qgroup_tree;
1049 struct rb_root qgroup_op_tree;
1050 spinlock_t qgroup_lock;
1051 spinlock_t qgroup_op_lock;
1052 atomic_t qgroup_op_seq;
1055 * used to avoid frequently calling ulist_alloc()/ulist_free()
1056 * when doing qgroup accounting, it must be protected by qgroup_lock.
1058 struct ulist *qgroup_ulist;
1060 /* protect user change for quota operations */
1061 struct mutex qgroup_ioctl_lock;
1063 /* list of dirty qgroups to be written at next commit */
1064 struct list_head dirty_qgroups;
1066 /* used by qgroup for an efficient tree traversal */
1069 /* qgroup rescan items */
1070 struct mutex qgroup_rescan_lock; /* protects the progress item */
1071 struct btrfs_key qgroup_rescan_progress;
1072 struct btrfs_workqueue *qgroup_rescan_workers;
1073 struct completion qgroup_rescan_completion;
1074 struct btrfs_work qgroup_rescan_work;
1075 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1077 /* filesystem state */
1078 unsigned long fs_state;
1080 struct btrfs_delayed_root *delayed_root;
1082 /* readahead tree */
1083 spinlock_t reada_lock;
1084 struct radix_tree_root reada_tree;
1086 /* readahead works cnt */
1087 atomic_t reada_works_cnt;
1089 /* Extent buffer radix tree */
1090 spinlock_t buffer_lock;
1091 struct radix_tree_root buffer_radix;
1093 /* next backup root to be overwritten */
1094 int backup_root_index;
1096 /* device replace state */
1097 struct btrfs_dev_replace dev_replace;
1099 struct percpu_counter bio_counter;
1100 wait_queue_head_t replace_wait;
1102 struct semaphore uuid_tree_rescan_sem;
1104 /* Used to reclaim the metadata space in the background. */
1105 struct work_struct async_reclaim_work;
1107 spinlock_t unused_bgs_lock;
1108 struct list_head unused_bgs;
1109 struct mutex unused_bg_unpin_mutex;
1110 struct mutex delete_unused_bgs_mutex;
1112 /* For btrfs to record security options */
1113 struct security_mnt_opts security_opts;
1116 * Chunks that can't be freed yet (under a trim/discard operation)
1117 * and will be latter freed. Protected by fs_info->chunk_mutex.
1119 struct list_head pinned_chunks;
1121 /* Cached block sizes */
1126 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1127 spinlock_t ref_verify_lock;
1128 struct rb_root block_tree;
1132 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1134 return sb->s_fs_info;
1137 struct btrfs_subvolume_writers {
1138 struct percpu_counter counter;
1139 wait_queue_head_t wait;
1143 * The state of btrfs root
1146 * btrfs_record_root_in_trans is a multi-step process,
1147 * and it can race with the balancing code. But the
1148 * race is very small, and only the first time the root
1149 * is added to each transaction. So IN_TRANS_SETUP
1150 * is used to tell us when more checks are required
1152 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1153 #define BTRFS_ROOT_REF_COWS 1
1154 #define BTRFS_ROOT_TRACK_DIRTY 2
1155 #define BTRFS_ROOT_IN_RADIX 3
1156 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1157 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1158 #define BTRFS_ROOT_FORCE_COW 6
1159 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1160 #define BTRFS_ROOT_DIRTY 8
1163 * in ram representation of the tree. extent_root is used for all allocations
1164 * and for the extent tree extent_root root.
1167 struct extent_buffer *node;
1169 struct extent_buffer *commit_root;
1170 struct btrfs_root *log_root;
1171 struct btrfs_root *reloc_root;
1173 unsigned long state;
1174 struct btrfs_root_item root_item;
1175 struct btrfs_key root_key;
1176 struct btrfs_fs_info *fs_info;
1177 struct extent_io_tree dirty_log_pages;
1179 struct mutex objectid_mutex;
1181 spinlock_t accounting_lock;
1182 struct btrfs_block_rsv *block_rsv;
1184 /* free ino cache stuff */
1185 struct btrfs_free_space_ctl *free_ino_ctl;
1186 enum btrfs_caching_type ino_cache_state;
1187 spinlock_t ino_cache_lock;
1188 wait_queue_head_t ino_cache_wait;
1189 struct btrfs_free_space_ctl *free_ino_pinned;
1190 u64 ino_cache_progress;
1191 struct inode *ino_cache_inode;
1193 struct mutex log_mutex;
1194 wait_queue_head_t log_writer_wait;
1195 wait_queue_head_t log_commit_wait[2];
1196 struct list_head log_ctxs[2];
1197 atomic_t log_writers;
1198 atomic_t log_commit[2];
1201 /* No matter the commit succeeds or not*/
1202 int log_transid_committed;
1203 /* Just be updated when the commit succeeds. */
1204 int last_log_commit;
1205 pid_t log_start_pid;
1212 u64 highest_objectid;
1214 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1215 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1219 u64 defrag_trans_start;
1220 struct btrfs_key defrag_progress;
1221 struct btrfs_key defrag_max;
1224 /* the dirty list is only used by non-reference counted roots */
1225 struct list_head dirty_list;
1227 struct list_head root_list;
1229 spinlock_t log_extents_lock[2];
1230 struct list_head logged_list[2];
1232 int orphan_cleanup_state;
1234 spinlock_t inode_lock;
1235 /* red-black tree that keeps track of in-memory inodes */
1236 struct rb_root inode_tree;
1239 * radix tree that keeps track of delayed nodes of every inode,
1240 * protected by inode_lock
1242 struct radix_tree_root delayed_nodes_tree;
1244 * right now this just gets used so that a root has its own devid
1245 * for stat. It may be used for more later
1249 spinlock_t root_item_lock;
1252 struct mutex delalloc_mutex;
1253 spinlock_t delalloc_lock;
1255 * all of the inodes that have delalloc bytes. It is possible for
1256 * this list to be empty even when there is still dirty data=ordered
1257 * extents waiting to finish IO.
1259 struct list_head delalloc_inodes;
1260 struct list_head delalloc_root;
1261 u64 nr_delalloc_inodes;
1263 struct mutex ordered_extent_mutex;
1265 * this is used by the balancing code to wait for all the pending
1268 spinlock_t ordered_extent_lock;
1271 * all of the data=ordered extents pending writeback
1272 * these can span multiple transactions and basically include
1273 * every dirty data page that isn't from nodatacow
1275 struct list_head ordered_extents;
1276 struct list_head ordered_root;
1277 u64 nr_ordered_extents;
1280 * Number of currently running SEND ioctls to prevent
1281 * manipulation with the read-only status via SUBVOL_SETFLAGS
1283 int send_in_progress;
1284 struct btrfs_subvolume_writers *subv_writers;
1285 atomic_t will_be_snapshotted;
1287 /* For qgroup metadata reserved space */
1288 spinlock_t qgroup_meta_rsv_lock;
1289 u64 qgroup_meta_rsv_pertrans;
1290 u64 qgroup_meta_rsv_prealloc;
1293 struct btrfs_file_private {
1297 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1299 return btrfs_sb(inode->i_sb)->sectorsize;
1302 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1305 return info->nodesize - sizeof(struct btrfs_header);
1308 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1310 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1312 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1315 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1317 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1320 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1321 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1322 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1324 return BTRFS_MAX_ITEM_SIZE(info) -
1325 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1328 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1330 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1334 * Flags for mount options.
1336 * Note: don't forget to add new options to btrfs_show_options()
1338 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1339 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1340 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1341 #define BTRFS_MOUNT_SSD (1 << 3)
1342 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1343 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1344 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1345 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1346 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1347 #define BTRFS_MOUNT_NOSSD (1 << 9)
1348 #define BTRFS_MOUNT_DISCARD (1 << 10)
1349 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1350 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1351 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1352 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1353 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1354 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1355 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1356 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1357 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1358 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1359 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1360 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1361 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1362 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1363 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1364 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1365 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1366 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1368 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1369 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1371 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1372 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1373 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1374 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1377 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1379 if (!btrfs_test_opt(fs_info, opt)) \
1380 btrfs_info(fs_info, fmt, ##args); \
1381 btrfs_set_opt(fs_info->mount_opt, opt); \
1384 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1386 if (btrfs_test_opt(fs_info, opt)) \
1387 btrfs_info(fs_info, fmt, ##args); \
1388 btrfs_clear_opt(fs_info->mount_opt, opt); \
1391 #ifdef CONFIG_BTRFS_DEBUG
1393 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1395 struct btrfs_fs_info *fs_info = block_group->fs_info;
1397 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1398 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1399 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1400 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1405 * Requests for changes that need to be done during transaction commit.
1407 * Internal mount options that are used for special handling of the real
1408 * mount options (eg. cannot be set during remount and have to be set during
1409 * transaction commit)
1412 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1413 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1414 #define BTRFS_PENDING_COMMIT (2)
1416 #define btrfs_test_pending(info, opt) \
1417 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1418 #define btrfs_set_pending(info, opt) \
1419 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1420 #define btrfs_clear_pending(info, opt) \
1421 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1424 * Helpers for setting pending mount option changes.
1426 * Expects corresponding macros
1427 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1429 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1431 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1432 btrfs_info((info), fmt, ##args); \
1433 btrfs_set_pending((info), SET_##opt); \
1434 btrfs_clear_pending((info), CLEAR_##opt); \
1438 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1440 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1441 btrfs_info((info), fmt, ##args); \
1442 btrfs_set_pending((info), CLEAR_##opt); \
1443 btrfs_clear_pending((info), SET_##opt); \
1450 #define BTRFS_INODE_NODATASUM (1 << 0)
1451 #define BTRFS_INODE_NODATACOW (1 << 1)
1452 #define BTRFS_INODE_READONLY (1 << 2)
1453 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1454 #define BTRFS_INODE_PREALLOC (1 << 4)
1455 #define BTRFS_INODE_SYNC (1 << 5)
1456 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1457 #define BTRFS_INODE_APPEND (1 << 7)
1458 #define BTRFS_INODE_NODUMP (1 << 8)
1459 #define BTRFS_INODE_NOATIME (1 << 9)
1460 #define BTRFS_INODE_DIRSYNC (1 << 10)
1461 #define BTRFS_INODE_COMPRESS (1 << 11)
1463 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1465 struct btrfs_map_token {
1466 const struct extent_buffer *eb;
1468 unsigned long offset;
1471 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1472 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1474 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1476 token->kaddr = NULL;
1479 /* some macros to generate set/get functions for the struct fields. This
1480 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1483 #define le8_to_cpu(v) (v)
1484 #define cpu_to_le8(v) (v)
1487 #define read_eb_member(eb, ptr, type, member, result) (\
1488 read_extent_buffer(eb, (char *)(result), \
1489 ((unsigned long)(ptr)) + \
1490 offsetof(type, member), \
1491 sizeof(((type *)0)->member)))
1493 #define write_eb_member(eb, ptr, type, member, result) (\
1494 write_extent_buffer(eb, (char *)(result), \
1495 ((unsigned long)(ptr)) + \
1496 offsetof(type, member), \
1497 sizeof(((type *)0)->member)))
1499 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1500 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1501 const void *ptr, unsigned long off, \
1502 struct btrfs_map_token *token); \
1503 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1504 unsigned long off, u##bits val, \
1505 struct btrfs_map_token *token); \
1506 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1508 unsigned long off) \
1510 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1512 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1513 unsigned long off, u##bits val) \
1515 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1518 DECLARE_BTRFS_SETGET_BITS(8)
1519 DECLARE_BTRFS_SETGET_BITS(16)
1520 DECLARE_BTRFS_SETGET_BITS(32)
1521 DECLARE_BTRFS_SETGET_BITS(64)
1523 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1524 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1527 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1528 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1530 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1533 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1534 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1536 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1538 struct btrfs_map_token *token) \
1540 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1541 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1543 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1544 type *s, u##bits val, \
1545 struct btrfs_map_token *token) \
1547 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1548 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1551 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1552 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1554 const type *p = page_address(eb->pages[0]); \
1555 u##bits res = le##bits##_to_cpu(p->member); \
1558 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1561 type *p = page_address(eb->pages[0]); \
1562 p->member = cpu_to_le##bits(val); \
1565 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1566 static inline u##bits btrfs_##name(const type *s) \
1568 return le##bits##_to_cpu(s->member); \
1570 static inline void btrfs_set_##name(type *s, u##bits val) \
1572 s->member = cpu_to_le##bits(val); \
1576 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1577 struct btrfs_dev_item *s)
1579 BUILD_BUG_ON(sizeof(u64) !=
1580 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1581 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1584 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1585 struct btrfs_dev_item *s,
1588 BUILD_BUG_ON(sizeof(u64) !=
1589 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1590 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1591 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1595 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1596 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1597 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1598 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1599 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1601 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1602 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1603 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1604 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1605 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1606 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1608 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1609 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1611 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1613 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1615 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1617 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1619 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1622 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1624 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1626 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1629 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1631 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1634 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1636 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1639 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1640 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1641 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1642 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1643 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1644 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1645 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1646 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1647 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1648 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1649 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1651 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1653 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1656 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1658 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1660 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1662 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1671 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1672 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1674 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1677 unsigned long offset = (unsigned long)c;
1678 offset += offsetof(struct btrfs_chunk, stripe);
1679 offset += nr * sizeof(struct btrfs_stripe);
1680 return (struct btrfs_stripe *)offset;
1683 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1685 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1688 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1689 struct btrfs_chunk *c, int nr)
1691 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1694 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1695 struct btrfs_chunk *c, int nr)
1697 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1700 /* struct btrfs_block_group_item */
1701 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1703 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1705 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1706 struct btrfs_block_group_item, chunk_objectid, 64);
1708 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1709 struct btrfs_block_group_item, chunk_objectid, 64);
1710 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1711 struct btrfs_block_group_item, flags, 64);
1712 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1713 struct btrfs_block_group_item, flags, 64);
1715 /* struct btrfs_free_space_info */
1716 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1718 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1720 /* struct btrfs_inode_ref */
1721 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1722 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1724 /* struct btrfs_inode_extref */
1725 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1726 parent_objectid, 64);
1727 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1729 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1731 /* struct btrfs_inode_item */
1732 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1733 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1734 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1735 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1736 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1737 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1738 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1739 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1740 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1741 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1742 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1743 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1744 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1746 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1759 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1761 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1762 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1763 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1764 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1766 /* struct btrfs_dev_extent */
1767 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1769 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1770 chunk_objectid, 64);
1771 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1773 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1775 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1777 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1778 return (unsigned long)dev + ptr;
1781 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1782 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1784 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1786 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1789 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1791 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1792 struct btrfs_tree_block_info *item,
1793 struct btrfs_disk_key *key)
1795 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1798 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1799 struct btrfs_tree_block_info *item,
1800 struct btrfs_disk_key *key)
1802 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1805 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1807 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1809 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1811 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1814 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1817 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1819 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1822 static inline u32 btrfs_extent_inline_ref_size(int type)
1824 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1825 type == BTRFS_SHARED_BLOCK_REF_KEY)
1826 return sizeof(struct btrfs_extent_inline_ref);
1827 if (type == BTRFS_SHARED_DATA_REF_KEY)
1828 return sizeof(struct btrfs_shared_data_ref) +
1829 sizeof(struct btrfs_extent_inline_ref);
1830 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1831 return sizeof(struct btrfs_extent_data_ref) +
1832 offsetof(struct btrfs_extent_inline_ref, offset);
1836 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1837 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1839 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1840 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1842 /* struct btrfs_node */
1843 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1844 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1845 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1847 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1850 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1853 ptr = offsetof(struct btrfs_node, ptrs) +
1854 sizeof(struct btrfs_key_ptr) * nr;
1855 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1858 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1862 ptr = offsetof(struct btrfs_node, ptrs) +
1863 sizeof(struct btrfs_key_ptr) * nr;
1864 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1867 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1870 ptr = offsetof(struct btrfs_node, ptrs) +
1871 sizeof(struct btrfs_key_ptr) * nr;
1872 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1875 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1879 ptr = offsetof(struct btrfs_node, ptrs) +
1880 sizeof(struct btrfs_key_ptr) * nr;
1881 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1884 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1886 return offsetof(struct btrfs_node, ptrs) +
1887 sizeof(struct btrfs_key_ptr) * nr;
1890 void btrfs_node_key(const struct extent_buffer *eb,
1891 struct btrfs_disk_key *disk_key, int nr);
1893 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1894 struct btrfs_disk_key *disk_key, int nr)
1897 ptr = btrfs_node_key_ptr_offset(nr);
1898 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1899 struct btrfs_key_ptr, key, disk_key);
1902 /* struct btrfs_item */
1903 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1904 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1905 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1906 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1908 static inline unsigned long btrfs_item_nr_offset(int nr)
1910 return offsetof(struct btrfs_leaf, items) +
1911 sizeof(struct btrfs_item) * nr;
1914 static inline struct btrfs_item *btrfs_item_nr(int nr)
1916 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1919 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1920 struct btrfs_item *item)
1922 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1925 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1927 return btrfs_item_end(eb, btrfs_item_nr(nr));
1930 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1932 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1935 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1937 return btrfs_item_size(eb, btrfs_item_nr(nr));
1940 static inline void btrfs_item_key(const struct extent_buffer *eb,
1941 struct btrfs_disk_key *disk_key, int nr)
1943 struct btrfs_item *item = btrfs_item_nr(nr);
1944 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1947 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1948 struct btrfs_disk_key *disk_key, int nr)
1950 struct btrfs_item *item = btrfs_item_nr(nr);
1951 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1954 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1957 * struct btrfs_root_ref
1959 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1960 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1961 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1963 /* struct btrfs_dir_item */
1964 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1965 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1966 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1967 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1968 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1969 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1971 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1973 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1976 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1977 const struct btrfs_dir_item *item,
1978 struct btrfs_disk_key *key)
1980 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1983 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1984 struct btrfs_dir_item *item,
1985 const struct btrfs_disk_key *key)
1987 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1990 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1992 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1994 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1997 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1998 const struct btrfs_free_space_header *h,
1999 struct btrfs_disk_key *key)
2001 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2004 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2005 struct btrfs_free_space_header *h,
2006 const struct btrfs_disk_key *key)
2008 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2011 /* struct btrfs_disk_key */
2012 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2014 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2015 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2017 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2018 const struct btrfs_disk_key *disk)
2020 cpu->offset = le64_to_cpu(disk->offset);
2021 cpu->type = disk->type;
2022 cpu->objectid = le64_to_cpu(disk->objectid);
2025 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2026 const struct btrfs_key *cpu)
2028 disk->offset = cpu_to_le64(cpu->offset);
2029 disk->type = cpu->type;
2030 disk->objectid = cpu_to_le64(cpu->objectid);
2033 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2034 struct btrfs_key *key, int nr)
2036 struct btrfs_disk_key disk_key;
2037 btrfs_node_key(eb, &disk_key, nr);
2038 btrfs_disk_key_to_cpu(key, &disk_key);
2041 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2042 struct btrfs_key *key, int nr)
2044 struct btrfs_disk_key disk_key;
2045 btrfs_item_key(eb, &disk_key, nr);
2046 btrfs_disk_key_to_cpu(key, &disk_key);
2049 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2050 const struct btrfs_dir_item *item,
2051 struct btrfs_key *key)
2053 struct btrfs_disk_key disk_key;
2054 btrfs_dir_item_key(eb, item, &disk_key);
2055 btrfs_disk_key_to_cpu(key, &disk_key);
2058 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2063 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2068 /* struct btrfs_header */
2069 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2070 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2072 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2073 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2074 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2075 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2076 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2078 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2079 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2081 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2083 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2085 return (btrfs_header_flags(eb) & flag) == flag;
2088 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2090 u64 flags = btrfs_header_flags(eb);
2091 btrfs_set_header_flags(eb, flags | flag);
2092 return (flags & flag) == flag;
2095 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2097 u64 flags = btrfs_header_flags(eb);
2098 btrfs_set_header_flags(eb, flags & ~flag);
2099 return (flags & flag) == flag;
2102 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2104 u64 flags = btrfs_header_flags(eb);
2105 return flags >> BTRFS_BACKREF_REV_SHIFT;
2108 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2111 u64 flags = btrfs_header_flags(eb);
2112 flags &= ~BTRFS_BACKREF_REV_MASK;
2113 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2114 btrfs_set_header_flags(eb, flags);
2117 static inline unsigned long btrfs_header_fsid(void)
2119 return offsetof(struct btrfs_header, fsid);
2122 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2124 return offsetof(struct btrfs_header, chunk_tree_uuid);
2127 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2129 return btrfs_header_level(eb) == 0;
2132 /* struct btrfs_root_item */
2133 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2135 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2136 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2137 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2139 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2141 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2142 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2143 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2144 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2145 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2146 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2147 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2148 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2150 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2152 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2154 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2156 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2158 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2161 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2163 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2166 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2168 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2171 /* struct btrfs_root_backup */
2172 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2174 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2176 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2177 tree_root_level, 8);
2179 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2181 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2182 chunk_root_gen, 64);
2183 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2184 chunk_root_level, 8);
2186 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2188 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2189 extent_root_gen, 64);
2190 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2191 extent_root_level, 8);
2193 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2195 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2197 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2200 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2202 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2204 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2207 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2209 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2211 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2212 csum_root_level, 8);
2213 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2215 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2217 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2220 /* struct btrfs_balance_item */
2221 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2223 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2224 const struct btrfs_balance_item *bi,
2225 struct btrfs_disk_balance_args *ba)
2227 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2230 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2231 struct btrfs_balance_item *bi,
2232 const struct btrfs_disk_balance_args *ba)
2234 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2237 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2238 const struct btrfs_balance_item *bi,
2239 struct btrfs_disk_balance_args *ba)
2241 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2244 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2245 struct btrfs_balance_item *bi,
2246 const struct btrfs_disk_balance_args *ba)
2248 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2251 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2252 const struct btrfs_balance_item *bi,
2253 struct btrfs_disk_balance_args *ba)
2255 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2258 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2259 struct btrfs_balance_item *bi,
2260 const struct btrfs_disk_balance_args *ba)
2262 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2266 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2267 const struct btrfs_disk_balance_args *disk)
2269 memset(cpu, 0, sizeof(*cpu));
2271 cpu->profiles = le64_to_cpu(disk->profiles);
2272 cpu->usage = le64_to_cpu(disk->usage);
2273 cpu->devid = le64_to_cpu(disk->devid);
2274 cpu->pstart = le64_to_cpu(disk->pstart);
2275 cpu->pend = le64_to_cpu(disk->pend);
2276 cpu->vstart = le64_to_cpu(disk->vstart);
2277 cpu->vend = le64_to_cpu(disk->vend);
2278 cpu->target = le64_to_cpu(disk->target);
2279 cpu->flags = le64_to_cpu(disk->flags);
2280 cpu->limit = le64_to_cpu(disk->limit);
2281 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2282 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2286 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2287 const struct btrfs_balance_args *cpu)
2289 memset(disk, 0, sizeof(*disk));
2291 disk->profiles = cpu_to_le64(cpu->profiles);
2292 disk->usage = cpu_to_le64(cpu->usage);
2293 disk->devid = cpu_to_le64(cpu->devid);
2294 disk->pstart = cpu_to_le64(cpu->pstart);
2295 disk->pend = cpu_to_le64(cpu->pend);
2296 disk->vstart = cpu_to_le64(cpu->vstart);
2297 disk->vend = cpu_to_le64(cpu->vend);
2298 disk->target = cpu_to_le64(cpu->target);
2299 disk->flags = cpu_to_le64(cpu->flags);
2300 disk->limit = cpu_to_le64(cpu->limit);
2301 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2302 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2305 /* struct btrfs_super_block */
2306 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2307 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2308 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2310 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2311 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2312 struct btrfs_super_block, sys_chunk_array_size, 32);
2313 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2314 struct btrfs_super_block, chunk_root_generation, 64);
2315 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2317 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2319 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2320 chunk_root_level, 8);
2321 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2323 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2324 log_root_transid, 64);
2325 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2327 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2329 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2331 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2333 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2335 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2337 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2338 root_dir_objectid, 64);
2339 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2341 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2343 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2344 compat_ro_flags, 64);
2345 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2346 incompat_flags, 64);
2347 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2349 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2350 cache_generation, 64);
2351 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2352 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2353 uuid_tree_generation, 64);
2355 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2357 u16 t = btrfs_super_csum_type(s);
2359 * csum type is validated at mount time
2361 return btrfs_csum_sizes[t];
2366 * The leaf data grows from end-to-front in the node.
2367 * this returns the address of the start of the last item,
2368 * which is the stop of the leaf data stack
2370 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2371 const struct extent_buffer *leaf)
2373 u32 nr = btrfs_header_nritems(leaf);
2376 return BTRFS_LEAF_DATA_SIZE(fs_info);
2377 return btrfs_item_offset_nr(leaf, nr - 1);
2380 /* struct btrfs_file_extent_item */
2381 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2382 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2383 struct btrfs_file_extent_item, disk_bytenr, 64);
2384 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2385 struct btrfs_file_extent_item, offset, 64);
2386 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2387 struct btrfs_file_extent_item, generation, 64);
2388 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2389 struct btrfs_file_extent_item, num_bytes, 64);
2390 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2391 struct btrfs_file_extent_item, disk_num_bytes, 64);
2392 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2393 struct btrfs_file_extent_item, compression, 8);
2395 static inline unsigned long
2396 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2398 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2401 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2403 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2406 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2408 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2410 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2411 disk_num_bytes, 64);
2412 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2414 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2416 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2418 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2420 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2422 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2423 other_encoding, 16);
2426 * this returns the number of bytes used by the item on disk, minus the
2427 * size of any extent headers. If a file is compressed on disk, this is
2428 * the compressed size
2430 static inline u32 btrfs_file_extent_inline_item_len(
2431 const struct extent_buffer *eb,
2432 struct btrfs_item *e)
2434 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2437 /* btrfs_dev_stats_item */
2438 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2439 const struct btrfs_dev_stats_item *ptr,
2444 read_extent_buffer(eb, &val,
2445 offsetof(struct btrfs_dev_stats_item, values) +
2446 ((unsigned long)ptr) + (index * sizeof(u64)),
2451 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2452 struct btrfs_dev_stats_item *ptr,
2455 write_extent_buffer(eb, &val,
2456 offsetof(struct btrfs_dev_stats_item, values) +
2457 ((unsigned long)ptr) + (index * sizeof(u64)),
2461 /* btrfs_qgroup_status_item */
2462 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2464 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2466 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2468 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2471 /* btrfs_qgroup_info_item */
2472 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2474 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2475 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2477 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2478 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2481 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2482 struct btrfs_qgroup_info_item, generation, 64);
2483 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2485 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2486 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2487 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2489 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2490 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2492 /* btrfs_qgroup_limit_item */
2493 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2495 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2497 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2499 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2501 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2504 /* btrfs_dev_replace_item */
2505 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2506 struct btrfs_dev_replace_item, src_devid, 64);
2507 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2508 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2510 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2512 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2514 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2516 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2517 num_write_errors, 64);
2518 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2519 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2521 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2523 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2527 struct btrfs_dev_replace_item, src_devid, 64);
2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2529 struct btrfs_dev_replace_item,
2530 cont_reading_from_srcdev_mode, 64);
2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2532 struct btrfs_dev_replace_item, replace_state, 64);
2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2534 struct btrfs_dev_replace_item, time_started, 64);
2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2536 struct btrfs_dev_replace_item, time_stopped, 64);
2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2538 struct btrfs_dev_replace_item, num_write_errors, 64);
2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2540 struct btrfs_dev_replace_item,
2541 num_uncorrectable_read_errors, 64);
2542 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2543 struct btrfs_dev_replace_item, cursor_left, 64);
2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2545 struct btrfs_dev_replace_item, cursor_right, 64);
2547 /* helper function to cast into the data area of the leaf. */
2548 #define btrfs_item_ptr(leaf, slot, type) \
2549 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2550 btrfs_item_offset_nr(leaf, slot)))
2552 #define btrfs_item_ptr_offset(leaf, slot) \
2553 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2554 btrfs_item_offset_nr(leaf, slot)))
2556 static inline u64 btrfs_name_hash(const char *name, int len)
2558 return crc32c((u32)~1, name, len);
2562 * Figure the key offset of an extended inode ref
2564 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2567 return (u64) crc32c(parent_objectid, name, len);
2570 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2572 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2573 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2576 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2578 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2583 enum btrfs_inline_ref_type {
2584 BTRFS_REF_TYPE_INVALID = 0,
2585 BTRFS_REF_TYPE_BLOCK = 1,
2586 BTRFS_REF_TYPE_DATA = 2,
2587 BTRFS_REF_TYPE_ANY = 3,
2590 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2591 struct btrfs_extent_inline_ref *iref,
2592 enum btrfs_inline_ref_type is_data);
2594 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2596 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2599 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2603 * Doing a truncate won't result in new nodes or leaves, just what we need for
2606 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2609 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2612 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2613 struct btrfs_fs_info *fs_info);
2614 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2615 struct btrfs_fs_info *fs_info);
2616 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2618 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2619 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2620 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2621 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2622 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2623 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2624 unsigned long count);
2625 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2626 unsigned long count, u64 transid, int wait);
2627 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2628 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2629 struct btrfs_fs_info *fs_info, u64 bytenr,
2630 u64 offset, int metadata, u64 *refs, u64 *flags);
2631 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2632 u64 bytenr, u64 num, int reserved);
2633 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2634 u64 bytenr, u64 num_bytes);
2635 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2636 struct extent_buffer *eb);
2637 int btrfs_cross_ref_exist(struct btrfs_root *root,
2638 u64 objectid, u64 offset, u64 bytenr);
2639 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2640 struct btrfs_fs_info *info,
2642 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2643 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2644 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2645 struct btrfs_root *root,
2646 u64 parent, u64 root_objectid,
2647 const struct btrfs_disk_key *key,
2648 int level, u64 hint,
2650 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2651 struct btrfs_root *root,
2652 struct extent_buffer *buf,
2653 u64 parent, int last_ref);
2654 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2655 struct btrfs_root *root, u64 owner,
2656 u64 offset, u64 ram_bytes,
2657 struct btrfs_key *ins);
2658 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2659 u64 root_objectid, u64 owner, u64 offset,
2660 struct btrfs_key *ins);
2661 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2662 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2663 struct btrfs_key *ins, int is_data, int delalloc);
2664 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2665 struct extent_buffer *buf, int full_backref);
2666 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2667 struct extent_buffer *buf, int full_backref);
2668 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2669 struct btrfs_fs_info *fs_info,
2670 u64 bytenr, u64 num_bytes, u64 flags,
2671 int level, int is_data);
2672 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2673 struct btrfs_root *root,
2674 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2675 u64 owner, u64 offset);
2677 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2678 u64 start, u64 len, int delalloc);
2679 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2680 u64 start, u64 len);
2681 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2682 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2683 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2684 struct btrfs_root *root,
2685 u64 bytenr, u64 num_bytes, u64 parent,
2686 u64 root_objectid, u64 owner, u64 offset);
2688 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2689 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2690 struct btrfs_fs_info *fs_info);
2691 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2692 struct btrfs_fs_info *fs_info);
2693 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2694 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2695 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2696 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2697 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2698 u64 bytes_used, u64 type, u64 chunk_offset,
2700 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2701 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2702 struct btrfs_fs_info *fs_info,
2703 const u64 chunk_offset);
2704 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2705 u64 group_start, struct extent_map *em);
2706 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2707 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2708 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2709 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2710 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2711 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2712 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2713 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2715 enum btrfs_reserve_flush_enum {
2716 /* If we are in the transaction, we can't flush anything.*/
2717 BTRFS_RESERVE_NO_FLUSH,
2719 * Flushing delalloc may cause deadlock somewhere, in this
2720 * case, use FLUSH LIMIT
2722 BTRFS_RESERVE_FLUSH_LIMIT,
2723 BTRFS_RESERVE_FLUSH_ALL,
2726 enum btrfs_flush_state {
2727 FLUSH_DELAYED_ITEMS_NR = 1,
2728 FLUSH_DELAYED_ITEMS = 2,
2730 FLUSH_DELALLOC_WAIT = 4,
2735 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2736 int btrfs_check_data_free_space(struct inode *inode,
2737 struct extent_changeset **reserved, u64 start, u64 len);
2738 void btrfs_free_reserved_data_space(struct inode *inode,
2739 struct extent_changeset *reserved, u64 start, u64 len);
2740 void btrfs_delalloc_release_space(struct inode *inode,
2741 struct extent_changeset *reserved,
2742 u64 start, u64 len, bool qgroup_free);
2743 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2745 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2746 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2747 struct btrfs_block_rsv *rsv,
2748 int nitems, bool use_global_rsv);
2749 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2750 struct btrfs_block_rsv *rsv);
2751 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2754 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2755 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2757 int btrfs_delalloc_reserve_space(struct inode *inode,
2758 struct extent_changeset **reserved, u64 start, u64 len);
2759 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2760 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2761 unsigned short type);
2762 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2763 struct btrfs_block_rsv *rsv,
2764 unsigned short type);
2765 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2766 struct btrfs_block_rsv *rsv);
2767 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
2768 int btrfs_block_rsv_add(struct btrfs_root *root,
2769 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2770 enum btrfs_reserve_flush_enum flush);
2771 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2772 int btrfs_block_rsv_refill(struct btrfs_root *root,
2773 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2774 enum btrfs_reserve_flush_enum flush);
2775 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2776 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2778 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2779 struct btrfs_block_rsv *dest, u64 num_bytes,
2781 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2782 struct btrfs_block_rsv *block_rsv,
2784 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2785 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2786 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2787 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2788 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2789 u64 start, u64 end);
2790 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2791 u64 num_bytes, u64 *actual_bytes);
2792 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2793 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2795 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2796 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2797 struct btrfs_fs_info *fs_info);
2798 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2799 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2800 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2801 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2802 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2803 u64 start, u64 end);
2804 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2807 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2808 int level, int *slot);
2809 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2810 int btrfs_previous_item(struct btrfs_root *root,
2811 struct btrfs_path *path, u64 min_objectid,
2813 int btrfs_previous_extent_item(struct btrfs_root *root,
2814 struct btrfs_path *path, u64 min_objectid);
2815 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2816 struct btrfs_path *path,
2817 const struct btrfs_key *new_key);
2818 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2819 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2820 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2821 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2822 struct btrfs_key *key, int lowest_level,
2824 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2825 struct btrfs_path *path,
2827 enum btrfs_compare_tree_result {
2828 BTRFS_COMPARE_TREE_NEW,
2829 BTRFS_COMPARE_TREE_DELETED,
2830 BTRFS_COMPARE_TREE_CHANGED,
2831 BTRFS_COMPARE_TREE_SAME,
2833 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2834 struct btrfs_path *right_path,
2835 struct btrfs_key *key,
2836 enum btrfs_compare_tree_result result,
2838 int btrfs_compare_trees(struct btrfs_root *left_root,
2839 struct btrfs_root *right_root,
2840 btrfs_changed_cb_t cb, void *ctx);
2841 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2842 struct btrfs_root *root, struct extent_buffer *buf,
2843 struct extent_buffer *parent, int parent_slot,
2844 struct extent_buffer **cow_ret);
2845 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2846 struct btrfs_root *root,
2847 struct extent_buffer *buf,
2848 struct extent_buffer **cow_ret, u64 new_root_objectid);
2849 int btrfs_block_can_be_shared(struct btrfs_root *root,
2850 struct extent_buffer *buf);
2851 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2853 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2854 struct btrfs_path *path, u32 new_size, int from_end);
2855 int btrfs_split_item(struct btrfs_trans_handle *trans,
2856 struct btrfs_root *root,
2857 struct btrfs_path *path,
2858 const struct btrfs_key *new_key,
2859 unsigned long split_offset);
2860 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2861 struct btrfs_root *root,
2862 struct btrfs_path *path,
2863 const struct btrfs_key *new_key);
2864 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2865 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2866 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2867 const struct btrfs_key *key, struct btrfs_path *p,
2868 int ins_len, int cow);
2869 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2870 struct btrfs_path *p, u64 time_seq);
2871 int btrfs_search_slot_for_read(struct btrfs_root *root,
2872 const struct btrfs_key *key,
2873 struct btrfs_path *p, int find_higher,
2875 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2876 struct btrfs_root *root, struct extent_buffer *parent,
2877 int start_slot, u64 *last_ret,
2878 struct btrfs_key *progress);
2879 void btrfs_release_path(struct btrfs_path *p);
2880 struct btrfs_path *btrfs_alloc_path(void);
2881 void btrfs_free_path(struct btrfs_path *p);
2882 void btrfs_set_path_blocking(struct btrfs_path *p);
2883 void btrfs_clear_path_blocking(struct btrfs_path *p,
2884 struct extent_buffer *held, int held_rw);
2885 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2887 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2888 struct btrfs_path *path, int slot, int nr);
2889 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2890 struct btrfs_root *root,
2891 struct btrfs_path *path)
2893 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2896 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2897 const struct btrfs_key *cpu_key, u32 *data_size,
2898 u32 total_data, u32 total_size, int nr);
2899 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2900 const struct btrfs_key *key, void *data, u32 data_size);
2901 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2902 struct btrfs_root *root,
2903 struct btrfs_path *path,
2904 const struct btrfs_key *cpu_key, u32 *data_size,
2907 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2908 struct btrfs_root *root,
2909 struct btrfs_path *path,
2910 const struct btrfs_key *key,
2913 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2916 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2917 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2918 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2920 static inline int btrfs_next_old_item(struct btrfs_root *root,
2921 struct btrfs_path *p, u64 time_seq)
2924 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2925 return btrfs_next_old_leaf(root, p, time_seq);
2928 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2930 return btrfs_next_old_item(root, p, 0);
2932 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2933 struct extent_buffer *leaf);
2934 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2935 struct btrfs_block_rsv *block_rsv,
2936 int update_ref, int for_reloc);
2937 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2938 struct btrfs_root *root,
2939 struct extent_buffer *node,
2940 struct extent_buffer *parent);
2941 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2944 * Do it this way so we only ever do one test_bit in the normal case.
2946 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2947 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2955 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2956 * anything except sleeping. This function is used to check the status of
2959 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2961 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2964 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2966 kfree(fs_info->balance_ctl);
2967 kfree(fs_info->delayed_root);
2968 kfree(fs_info->extent_root);
2969 kfree(fs_info->tree_root);
2970 kfree(fs_info->chunk_root);
2971 kfree(fs_info->dev_root);
2972 kfree(fs_info->csum_root);
2973 kfree(fs_info->quota_root);
2974 kfree(fs_info->uuid_root);
2975 kfree(fs_info->free_space_root);
2976 kfree(fs_info->super_copy);
2977 kfree(fs_info->super_for_commit);
2978 security_free_mnt_opts(&fs_info->security_opts);
2982 /* tree mod log functions from ctree.c */
2983 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2984 struct seq_list *elem);
2985 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2986 struct seq_list *elem);
2987 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2990 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2991 struct btrfs_fs_info *fs_info,
2992 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2993 const char *name, int name_len);
2994 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2995 struct btrfs_fs_info *fs_info,
2996 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2997 const char *name, int name_len);
2998 int btrfs_del_root(struct btrfs_trans_handle *trans,
2999 struct btrfs_fs_info *fs_info, const struct btrfs_key *key);
3000 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3001 const struct btrfs_key *key,
3002 struct btrfs_root_item *item);
3003 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3004 struct btrfs_root *root,
3005 struct btrfs_key *key,
3006 struct btrfs_root_item *item);
3007 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3008 struct btrfs_path *path, struct btrfs_root_item *root_item,
3009 struct btrfs_key *root_key);
3010 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3011 void btrfs_set_root_node(struct btrfs_root_item *item,
3012 struct extent_buffer *node);
3013 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3014 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3015 struct btrfs_root *root);
3018 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3020 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3022 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3023 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3027 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3028 const char *name, int name_len);
3029 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3030 struct btrfs_root *root, const char *name,
3031 int name_len, struct btrfs_inode *dir,
3032 struct btrfs_key *location, u8 type, u64 index);
3033 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3034 struct btrfs_root *root,
3035 struct btrfs_path *path, u64 dir,
3036 const char *name, int name_len,
3038 struct btrfs_dir_item *
3039 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3040 struct btrfs_root *root,
3041 struct btrfs_path *path, u64 dir,
3042 u64 objectid, const char *name, int name_len,
3044 struct btrfs_dir_item *
3045 btrfs_search_dir_index_item(struct btrfs_root *root,
3046 struct btrfs_path *path, u64 dirid,
3047 const char *name, int name_len);
3048 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3049 struct btrfs_root *root,
3050 struct btrfs_path *path,
3051 struct btrfs_dir_item *di);
3052 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3053 struct btrfs_root *root,
3054 struct btrfs_path *path, u64 objectid,
3055 const char *name, u16 name_len,
3056 const void *data, u16 data_len);
3057 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3058 struct btrfs_root *root,
3059 struct btrfs_path *path, u64 dir,
3060 const char *name, u16 name_len,
3062 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3063 struct btrfs_path *path,
3068 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3069 struct btrfs_root *root, u64 offset);
3070 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3071 struct btrfs_root *root, u64 offset);
3072 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3075 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3076 struct btrfs_root *root,
3077 const char *name, int name_len,
3078 u64 inode_objectid, u64 ref_objectid, u64 index);
3079 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3080 struct btrfs_root *root,
3081 const char *name, int name_len,
3082 u64 inode_objectid, u64 ref_objectid, u64 *index);
3083 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3084 struct btrfs_root *root,
3085 struct btrfs_path *path, u64 objectid);
3086 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3087 *root, struct btrfs_path *path,
3088 struct btrfs_key *location, int mod);
3090 struct btrfs_inode_extref *
3091 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3092 struct btrfs_root *root,
3093 struct btrfs_path *path,
3094 const char *name, int name_len,
3095 u64 inode_objectid, u64 ref_objectid, int ins_len,
3098 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3100 int name_len, struct btrfs_inode_ref **ref_ret);
3101 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3102 u64 ref_objectid, const char *name,
3104 struct btrfs_inode_extref **extref_ret);
3107 struct btrfs_dio_private;
3108 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3109 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3110 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3111 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3112 u64 logical_offset);
3113 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root,
3115 u64 objectid, u64 pos,
3116 u64 disk_offset, u64 disk_num_bytes,
3117 u64 num_bytes, u64 offset, u64 ram_bytes,
3118 u8 compression, u8 encryption, u16 other_encoding);
3119 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3120 struct btrfs_root *root,
3121 struct btrfs_path *path, u64 objectid,
3122 u64 bytenr, int mod);
3123 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3124 struct btrfs_root *root,
3125 struct btrfs_ordered_sum *sums);
3126 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3127 u64 file_start, int contig);
3128 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3129 struct list_head *list, int search_commit);
3130 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3131 const struct btrfs_path *path,
3132 struct btrfs_file_extent_item *fi,
3133 const bool new_inline,
3134 struct extent_map *em);
3137 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3138 struct page *page, size_t pg_offset, u64 start,
3139 u64 len, int create);
3140 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3141 u64 *orig_start, u64 *orig_block_len,
3144 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3145 struct btrfs_inode *inode);
3146 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3147 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3148 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3149 struct btrfs_root *root,
3150 struct btrfs_inode *dir, struct btrfs_inode *inode,
3151 const char *name, int name_len);
3152 int btrfs_add_link(struct btrfs_trans_handle *trans,
3153 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3154 const char *name, int name_len, int add_backref, u64 index);
3155 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3156 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3158 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root,
3160 struct inode *inode, u64 new_size,
3163 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
3164 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3165 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3166 unsigned int extra_bits,
3167 struct extent_state **cached_state, int dedupe);
3168 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3169 struct btrfs_root *new_root,
3170 struct btrfs_root *parent_root,
3172 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3173 size_t size, struct bio *bio,
3174 unsigned long bio_flags);
3175 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end);
3176 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3177 int btrfs_readpage(struct file *file, struct page *page);
3178 void btrfs_evict_inode(struct inode *inode);
3179 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3180 struct inode *btrfs_alloc_inode(struct super_block *sb);
3181 void btrfs_destroy_inode(struct inode *inode);
3182 int btrfs_drop_inode(struct inode *inode);
3183 int __init btrfs_init_cachep(void);
3184 void __cold btrfs_destroy_cachep(void);
3185 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3186 struct btrfs_root *root, int *was_new);
3187 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3188 struct page *page, size_t pg_offset,
3189 u64 start, u64 end, int create);
3190 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3191 struct btrfs_root *root,
3192 struct inode *inode);
3193 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3194 struct btrfs_root *root, struct inode *inode);
3195 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3196 struct btrfs_inode *inode);
3197 int btrfs_orphan_cleanup(struct btrfs_root *root);
3198 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3199 void btrfs_add_delayed_iput(struct inode *inode);
3200 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3201 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3202 u64 start, u64 num_bytes, u64 min_size,
3203 loff_t actual_len, u64 *alloc_hint);
3204 int btrfs_prealloc_file_range_trans(struct inode *inode,
3205 struct btrfs_trans_handle *trans, int mode,
3206 u64 start, u64 num_bytes, u64 min_size,
3207 loff_t actual_len, u64 *alloc_hint);
3208 extern const struct dentry_operations btrfs_dentry_operations;
3209 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3210 void btrfs_test_inode_set_ops(struct inode *inode);
3214 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3215 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3216 int btrfs_ioctl_get_supported_features(void __user *arg);
3217 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3218 int btrfs_is_empty_uuid(u8 *uuid);
3219 int btrfs_defrag_file(struct inode *inode, struct file *file,
3220 struct btrfs_ioctl_defrag_range_args *range,
3221 u64 newer_than, unsigned long max_pages);
3222 void btrfs_get_block_group_info(struct list_head *groups_list,
3223 struct btrfs_ioctl_space_info *space);
3224 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3225 struct btrfs_ioctl_balance_args *bargs);
3226 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
3227 struct file *dst_file, u64 dst_loff);
3230 int __init btrfs_auto_defrag_init(void);
3231 void __cold btrfs_auto_defrag_exit(void);
3232 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3233 struct btrfs_inode *inode);
3234 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3235 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3236 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3237 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3239 extern const struct file_operations btrfs_file_operations;
3240 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3241 struct btrfs_root *root, struct inode *inode,
3242 struct btrfs_path *path, u64 start, u64 end,
3243 u64 *drop_end, int drop_cache,
3245 u32 extent_item_size,
3247 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3248 struct btrfs_root *root, struct inode *inode, u64 start,
3249 u64 end, int drop_cache);
3250 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3251 struct btrfs_inode *inode, u64 start, u64 end);
3252 int btrfs_release_file(struct inode *inode, struct file *file);
3253 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3254 size_t num_pages, loff_t pos, size_t write_bytes,
3255 struct extent_state **cached);
3256 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3257 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3258 struct file *file_out, loff_t pos_out, u64 len);
3261 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3262 struct btrfs_root *root);
3265 int __init btrfs_init_sysfs(void);
3266 void __cold btrfs_exit_sysfs(void);
3267 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3268 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3271 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3272 unsigned long new_flags);
3273 int btrfs_sync_fs(struct super_block *sb, int wait);
3275 static inline __printf(2, 3) __cold
3276 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3280 #ifdef CONFIG_PRINTK
3283 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3285 #define btrfs_printk(fs_info, fmt, args...) \
3286 btrfs_no_printk(fs_info, fmt, ##args)
3289 #define btrfs_emerg(fs_info, fmt, args...) \
3290 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3291 #define btrfs_alert(fs_info, fmt, args...) \
3292 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3293 #define btrfs_crit(fs_info, fmt, args...) \
3294 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3295 #define btrfs_err(fs_info, fmt, args...) \
3296 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3297 #define btrfs_warn(fs_info, fmt, args...) \
3298 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3299 #define btrfs_notice(fs_info, fmt, args...) \
3300 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3301 #define btrfs_info(fs_info, fmt, args...) \
3302 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3305 * Wrappers that use printk_in_rcu
3307 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3308 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3309 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3310 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3311 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3312 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3313 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3314 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3315 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3316 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3317 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3318 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3319 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3320 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3323 * Wrappers that use a ratelimited printk_in_rcu
3325 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3326 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3327 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3328 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3329 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3330 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3331 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3332 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3333 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3334 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3335 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3336 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3337 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3338 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3341 * Wrappers that use a ratelimited printk
3343 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3344 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3345 #define btrfs_alert_rl(fs_info, fmt, args...) \
3346 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3347 #define btrfs_crit_rl(fs_info, fmt, args...) \
3348 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3349 #define btrfs_err_rl(fs_info, fmt, args...) \
3350 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3351 #define btrfs_warn_rl(fs_info, fmt, args...) \
3352 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3353 #define btrfs_notice_rl(fs_info, fmt, args...) \
3354 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3355 #define btrfs_info_rl(fs_info, fmt, args...) \
3356 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3358 #if defined(CONFIG_DYNAMIC_DEBUG)
3359 #define btrfs_debug(fs_info, fmt, args...) \
3361 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3362 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3363 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3365 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3367 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3368 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3369 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3371 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3373 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3374 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3375 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3378 #define btrfs_debug_rl(fs_info, fmt, args...) \
3380 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3381 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3382 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3385 #elif defined(DEBUG)
3386 #define btrfs_debug(fs_info, fmt, args...) \
3387 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3388 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3389 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3390 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3391 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3392 #define btrfs_debug_rl(fs_info, fmt, args...) \
3393 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3395 #define btrfs_debug(fs_info, fmt, args...) \
3396 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3397 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3398 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3399 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3400 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3401 #define btrfs_debug_rl(fs_info, fmt, args...) \
3402 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3405 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3408 btrfs_printk(fs_info, fmt, ##args); \
3409 rcu_read_unlock(); \
3412 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3414 static DEFINE_RATELIMIT_STATE(_rs, \
3415 DEFAULT_RATELIMIT_INTERVAL, \
3416 DEFAULT_RATELIMIT_BURST); \
3417 if (__ratelimit(&_rs)) \
3418 btrfs_printk(fs_info, fmt, ##args); \
3421 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3424 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3425 rcu_read_unlock(); \
3428 #ifdef CONFIG_BTRFS_ASSERT
3431 static inline void assfail(char *expr, char *file, int line)
3433 pr_err("assertion failed: %s, file: %s, line: %d\n",
3438 #define ASSERT(expr) \
3439 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3441 #define ASSERT(expr) ((void)0)
3445 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3448 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3453 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3454 unsigned int line, int errno, const char *fmt, ...);
3456 const char *btrfs_decode_error(int errno);
3459 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3460 const char *function,
3461 unsigned int line, int errno);
3464 * Call btrfs_abort_transaction as early as possible when an error condition is
3465 * detected, that way the exact line number is reported.
3467 #define btrfs_abort_transaction(trans, errno) \
3469 /* Report first abort since mount */ \
3470 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3471 &((trans)->fs_info->fs_state))) { \
3472 if ((errno) != -EIO) { \
3473 WARN(1, KERN_DEBUG \
3474 "BTRFS: Transaction aborted (error %d)\n", \
3477 btrfs_debug((trans)->fs_info, \
3478 "Transaction aborted (error %d)", \
3482 __btrfs_abort_transaction((trans), __func__, \
3483 __LINE__, (errno)); \
3486 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3488 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3489 (errno), fmt, ##args); \
3494 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3495 unsigned int line, int errno, const char *fmt, ...);
3497 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3498 * will panic(). Otherwise we BUG() here.
3500 #define btrfs_panic(fs_info, errno, fmt, args...) \
3502 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3507 /* compatibility and incompatibility defines */
3509 #define btrfs_set_fs_incompat(__fs_info, opt) \
3510 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3512 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3515 struct btrfs_super_block *disk_super;
3518 disk_super = fs_info->super_copy;
3519 features = btrfs_super_incompat_flags(disk_super);
3520 if (!(features & flag)) {
3521 spin_lock(&fs_info->super_lock);
3522 features = btrfs_super_incompat_flags(disk_super);
3523 if (!(features & flag)) {
3525 btrfs_set_super_incompat_flags(disk_super, features);
3526 btrfs_info(fs_info, "setting %llu feature flag",
3529 spin_unlock(&fs_info->super_lock);
3533 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3534 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3536 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3539 struct btrfs_super_block *disk_super;
3542 disk_super = fs_info->super_copy;
3543 features = btrfs_super_incompat_flags(disk_super);
3544 if (features & flag) {
3545 spin_lock(&fs_info->super_lock);
3546 features = btrfs_super_incompat_flags(disk_super);
3547 if (features & flag) {
3549 btrfs_set_super_incompat_flags(disk_super, features);
3550 btrfs_info(fs_info, "clearing %llu feature flag",
3553 spin_unlock(&fs_info->super_lock);
3557 #define btrfs_fs_incompat(fs_info, opt) \
3558 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3560 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3562 struct btrfs_super_block *disk_super;
3563 disk_super = fs_info->super_copy;
3564 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3567 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3568 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3570 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3573 struct btrfs_super_block *disk_super;
3576 disk_super = fs_info->super_copy;
3577 features = btrfs_super_compat_ro_flags(disk_super);
3578 if (!(features & flag)) {
3579 spin_lock(&fs_info->super_lock);
3580 features = btrfs_super_compat_ro_flags(disk_super);
3581 if (!(features & flag)) {
3583 btrfs_set_super_compat_ro_flags(disk_super, features);
3584 btrfs_info(fs_info, "setting %llu ro feature flag",
3587 spin_unlock(&fs_info->super_lock);
3591 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3592 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3594 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3597 struct btrfs_super_block *disk_super;
3600 disk_super = fs_info->super_copy;
3601 features = btrfs_super_compat_ro_flags(disk_super);
3602 if (features & flag) {
3603 spin_lock(&fs_info->super_lock);
3604 features = btrfs_super_compat_ro_flags(disk_super);
3605 if (features & flag) {
3607 btrfs_set_super_compat_ro_flags(disk_super, features);
3608 btrfs_info(fs_info, "clearing %llu ro feature flag",
3611 spin_unlock(&fs_info->super_lock);
3615 #define btrfs_fs_compat_ro(fs_info, opt) \
3616 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3618 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3620 struct btrfs_super_block *disk_super;
3621 disk_super = fs_info->super_copy;
3622 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3626 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3627 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3628 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3629 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3630 struct inode *inode, struct inode *dir);
3632 #define btrfs_get_acl NULL
3633 #define btrfs_set_acl NULL
3634 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3635 struct inode *inode, struct inode *dir)
3642 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3643 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3644 struct btrfs_root *root);
3645 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3646 struct btrfs_root *root);
3647 int btrfs_recover_relocation(struct btrfs_root *root);
3648 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3649 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3650 struct btrfs_root *root, struct extent_buffer *buf,
3651 struct extent_buffer *cow);
3652 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3653 u64 *bytes_to_reserve);
3654 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3655 struct btrfs_pending_snapshot *pending);
3658 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3659 u64 end, struct btrfs_scrub_progress *progress,
3660 int readonly, int is_dev_replace);
3661 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3662 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3663 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3664 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3665 struct btrfs_device *dev);
3666 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3667 struct btrfs_scrub_progress *progress);
3668 static inline void btrfs_init_full_stripe_locks_tree(
3669 struct btrfs_full_stripe_locks_tree *locks_root)
3671 locks_root->root = RB_ROOT;
3672 mutex_init(&locks_root->lock);
3676 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3677 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3678 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3680 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3682 btrfs_bio_counter_sub(fs_info, 1);
3686 struct reada_control {
3687 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3688 struct btrfs_key key_start;
3689 struct btrfs_key key_end; /* exclusive */
3692 wait_queue_head_t wait;
3694 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3695 struct btrfs_key *start, struct btrfs_key *end);
3696 int btrfs_reada_wait(void *handle);
3697 void btrfs_reada_detach(void *handle);
3698 int btree_readahead_hook(struct extent_buffer *eb, int err);
3700 static inline int is_fstree(u64 rootid)
3702 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3703 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3704 !btrfs_qgroup_level(rootid)))
3709 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3711 return signal_pending(current);
3714 /* Sanity test specific functions */
3715 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3716 void btrfs_test_destroy_inode(struct inode *inode);
3719 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3721 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3722 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3723 &fs_info->fs_state)))
3729 static inline void cond_wake_up(struct wait_queue_head *wq)
3732 * This implies a full smp_mb barrier, see comments for
3733 * waitqueue_active why.
3735 if (wq_has_sleeper(wq))
3739 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3742 * Special case for conditional wakeup where the barrier required for
3743 * waitqueue_active is implied by some of the preceding code. Eg. one
3744 * of such atomic operations (atomic_dec_and_return, ...), or a
3745 * unlock/lock sequence, etc.
3747 if (waitqueue_active(wq))