1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <linux/kobject.h>
20 #include <trace/events/btrfs.h>
21 #include <asm/kmap_types.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle;
36 struct btrfs_transaction;
37 struct btrfs_pending_snapshot;
38 extern struct kmem_cache *btrfs_trans_handle_cachep;
39 extern struct kmem_cache *btrfs_bit_radix_cachep;
40 extern struct kmem_cache *btrfs_path_cachep;
41 extern struct kmem_cache *btrfs_free_space_cachep;
42 struct btrfs_ordered_sum;
44 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
46 #define BTRFS_MAX_MIRRORS 3
48 #define BTRFS_MAX_LEVEL 8
50 #define BTRFS_OLDEST_GENERATION 0ULL
53 * the max metadata block size. This limit is somewhat artificial,
54 * but the memmove costs go through the roof for larger blocks.
56 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
59 * we can actually store much bigger names, but lets not confuse the rest
62 #define BTRFS_NAME_LEN 255
65 * Theoretical limit is larger, but we keep this down to a sane
66 * value. That should limit greatly the possibility of collisions on
69 #define BTRFS_LINK_MAX 65535U
71 /* four bytes for CRC32 */
72 static const int btrfs_csum_sizes[] = { 4 };
74 #define BTRFS_EMPTY_DIR_SIZE 0
76 /* ioprio of readahead is set to idle */
77 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
79 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
82 * Use large batch size to reduce overhead of metadata updates. On the reader
83 * side, we only read it when we are close to ENOSPC and the read overhead is
84 * mostly related to the number of CPUs, so it is OK to use arbitrary large
87 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
89 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
93 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
95 static inline u32 count_max_extents(u64 size)
97 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
100 struct btrfs_mapping_tree {
101 struct extent_map_tree map_tree;
104 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
106 BUG_ON(num_stripes == 0);
107 return sizeof(struct btrfs_chunk) +
108 sizeof(struct btrfs_stripe) * (num_stripes - 1);
114 #define BTRFS_FS_STATE_ERROR 0
115 #define BTRFS_FS_STATE_REMOUNTING 1
116 #define BTRFS_FS_STATE_TRANS_ABORTED 2
117 #define BTRFS_FS_STATE_DEV_REPLACING 3
118 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
120 #define BTRFS_BACKREF_REV_MAX 256
121 #define BTRFS_BACKREF_REV_SHIFT 56
122 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
123 BTRFS_BACKREF_REV_SHIFT)
125 #define BTRFS_OLD_BACKREF_REV 0
126 #define BTRFS_MIXED_BACKREF_REV 1
129 * every tree block (leaf or node) starts with this header.
131 struct btrfs_header {
132 /* these first four must match the super block */
133 u8 csum[BTRFS_CSUM_SIZE];
134 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
135 __le64 bytenr; /* which block this node is supposed to live in */
138 /* allowed to be different from the super from here on down */
139 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
144 } __attribute__ ((__packed__));
147 * this is a very generous portion of the super block, giving us
148 * room to translate 14 chunks with 3 stripes each.
150 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
153 * just in case we somehow lose the roots and are not able to mount,
154 * we store an array of the roots from previous transactions
157 #define BTRFS_NUM_BACKUP_ROOTS 4
158 struct btrfs_root_backup {
160 __le64 tree_root_gen;
163 __le64 chunk_root_gen;
166 __le64 extent_root_gen;
175 __le64 csum_root_gen;
185 u8 extent_root_level;
189 /* future and to align */
191 } __attribute__ ((__packed__));
194 * the super block basically lists the main trees of the FS
195 * it currently lacks any block count etc etc
197 struct btrfs_super_block {
198 u8 csum[BTRFS_CSUM_SIZE];
199 /* the first 4 fields must match struct btrfs_header */
200 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
201 __le64 bytenr; /* this block number */
204 /* allowed to be different from the btrfs_header from here own down */
211 /* this will help find the new super based on the log root */
212 __le64 log_root_transid;
215 __le64 root_dir_objectid;
219 __le32 __unused_leafsize;
221 __le32 sys_chunk_array_size;
222 __le64 chunk_root_generation;
224 __le64 compat_ro_flags;
225 __le64 incompat_flags;
230 struct btrfs_dev_item dev_item;
232 char label[BTRFS_LABEL_SIZE];
234 __le64 cache_generation;
235 __le64 uuid_tree_generation;
237 /* future expansion */
239 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
240 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
241 } __attribute__ ((__packed__));
244 * Compat flags that we support. If any incompat flags are set other than the
245 * ones specified below then we will fail to mount
247 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
248 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
249 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
251 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
252 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
253 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
255 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
256 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
258 #define BTRFS_FEATURE_INCOMPAT_SUPP \
259 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
260 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
261 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
262 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
263 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
264 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
265 BTRFS_FEATURE_INCOMPAT_RAID56 | \
266 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
267 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
268 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
270 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
271 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
272 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
275 * A leaf is full of items. offset and size tell us where to find
276 * the item in the leaf (relative to the start of the data area)
279 struct btrfs_disk_key key;
282 } __attribute__ ((__packed__));
285 * leaves have an item area and a data area:
286 * [item0, item1....itemN] [free space] [dataN...data1, data0]
288 * The data is separate from the items to get the keys closer together
292 struct btrfs_header header;
293 struct btrfs_item items[];
294 } __attribute__ ((__packed__));
297 * all non-leaf blocks are nodes, they hold only keys and pointers to
300 struct btrfs_key_ptr {
301 struct btrfs_disk_key key;
304 } __attribute__ ((__packed__));
307 struct btrfs_header header;
308 struct btrfs_key_ptr ptrs[];
309 } __attribute__ ((__packed__));
312 * btrfs_paths remember the path taken from the root down to the leaf.
313 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
314 * to any other levels that are present.
316 * The slots array records the index of the item or block pointer
317 * used while walking the tree.
319 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
321 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
322 int slots[BTRFS_MAX_LEVEL];
323 /* if there is real range locking, this locks field will change */
324 u8 locks[BTRFS_MAX_LEVEL];
326 /* keep some upper locks as we walk down */
330 * set by btrfs_split_item, tells search_slot to keep all locks
331 * and to force calls to keep space in the nodes
333 unsigned int search_for_split:1;
334 unsigned int keep_locks:1;
335 unsigned int skip_locking:1;
336 unsigned int leave_spinning:1;
337 unsigned int search_commit_root:1;
338 unsigned int need_commit_sem:1;
339 unsigned int skip_release_on_error:1;
341 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
342 sizeof(struct btrfs_item))
343 struct btrfs_dev_replace {
344 u64 replace_state; /* see #define above */
345 time64_t time_started; /* seconds since 1-Jan-1970 */
346 time64_t time_stopped; /* seconds since 1-Jan-1970 */
347 atomic64_t num_write_errors;
348 atomic64_t num_uncorrectable_read_errors;
351 u64 committed_cursor_left;
352 u64 cursor_left_last_write_of_item;
355 u64 cont_reading_from_srcdev_mode; /* see #define above */
358 int item_needs_writeback;
359 struct btrfs_device *srcdev;
360 struct btrfs_device *tgtdev;
362 struct mutex lock_finishing_cancel_unmount;
365 atomic_t blocking_readers;
366 wait_queue_head_t read_lock_wq;
368 struct btrfs_scrub_progress scrub_progress;
371 /* For raid type sysfs entries */
372 struct raid_kobject {
375 struct list_head list;
378 struct btrfs_space_info {
381 u64 total_bytes; /* total bytes in the space,
382 this doesn't take mirrors into account */
383 u64 bytes_used; /* total bytes used,
384 this doesn't take mirrors into account */
385 u64 bytes_pinned; /* total bytes pinned, will be freed when the
386 transaction finishes */
387 u64 bytes_reserved; /* total bytes the allocator has reserved for
388 current allocations */
389 u64 bytes_may_use; /* number of bytes that may be used for
390 delalloc/allocations */
391 u64 bytes_readonly; /* total bytes that are read only */
393 u64 max_extent_size; /* This will hold the maximum extent size of
394 the space info if we had an ENOSPC in the
397 unsigned int full:1; /* indicates that we cannot allocate any more
398 chunks for this space */
399 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
401 unsigned int flush:1; /* set if we are trying to make space */
403 unsigned int force_alloc; /* set if we need to force a chunk
404 alloc for this space */
406 u64 disk_used; /* total bytes used on disk */
407 u64 disk_total; /* total bytes on disk, takes mirrors into
413 * bytes_pinned is kept in line with what is actually pinned, as in
414 * we've called update_block_group and dropped the bytes_used counter
415 * and increased the bytes_pinned counter. However this means that
416 * bytes_pinned does not reflect the bytes that will be pinned once the
417 * delayed refs are flushed, so this counter is inc'ed every time we
418 * call btrfs_free_extent so it is a realtime count of what will be
419 * freed once the transaction is committed. It will be zeroed every
420 * time the transaction commits.
422 struct percpu_counter total_bytes_pinned;
424 struct list_head list;
425 /* Protected by the spinlock 'lock'. */
426 struct list_head ro_bgs;
427 struct list_head priority_tickets;
428 struct list_head tickets;
430 * tickets_id just indicates the next ticket will be handled, so note
431 * it's not stored per ticket.
435 struct rw_semaphore groups_sem;
436 /* for block groups in our same type */
437 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
438 wait_queue_head_t wait;
441 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
444 #define BTRFS_BLOCK_RSV_GLOBAL 1
445 #define BTRFS_BLOCK_RSV_DELALLOC 2
446 #define BTRFS_BLOCK_RSV_TRANS 3
447 #define BTRFS_BLOCK_RSV_CHUNK 4
448 #define BTRFS_BLOCK_RSV_DELOPS 5
449 #define BTRFS_BLOCK_RSV_EMPTY 6
450 #define BTRFS_BLOCK_RSV_TEMP 7
452 struct btrfs_block_rsv {
455 struct btrfs_space_info *space_info;
459 unsigned short failfast;
462 * Qgroup equivalent for @size @reserved
464 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
465 * about things like csum size nor how many tree blocks it will need to
468 * Qgroup cares more about net change of the extent usage.
470 * So for one newly inserted file extent, in worst case it will cause
471 * leaf split and level increase, nodesize for each file extent is
474 * In short, qgroup_size/reserved is the upper limit of possible needed
475 * qgroup metadata reservation.
478 u64 qgroup_rsv_reserved;
482 * free clusters are used to claim free space in relatively large chunks,
483 * allowing us to do less seeky writes. They are used for all metadata
484 * allocations. In ssd_spread mode they are also used for data allocations.
486 struct btrfs_free_cluster {
488 spinlock_t refill_lock;
491 /* largest extent in this cluster */
494 /* first extent starting offset */
497 /* We did a full search and couldn't create a cluster */
500 struct btrfs_block_group_cache *block_group;
502 * when a cluster is allocated from a block group, we put the
503 * cluster onto a list in the block group so that it can
504 * be freed before the block group is freed.
506 struct list_head block_group_list;
509 enum btrfs_caching_type {
511 BTRFS_CACHE_STARTED = 1,
512 BTRFS_CACHE_FAST = 2,
513 BTRFS_CACHE_FINISHED = 3,
514 BTRFS_CACHE_ERROR = 4,
517 enum btrfs_disk_cache_state {
518 BTRFS_DC_WRITTEN = 0,
524 struct btrfs_caching_control {
525 struct list_head list;
527 wait_queue_head_t wait;
528 struct btrfs_work work;
529 struct btrfs_block_group_cache *block_group;
534 /* Once caching_thread() finds this much free space, it will wake up waiters. */
535 #define CACHING_CTL_WAKE_UP SZ_2M
537 struct btrfs_io_ctl {
541 struct btrfs_fs_info *fs_info;
548 unsigned check_crcs:1;
552 * Tree to record all locked full stripes of a RAID5/6 block group
554 struct btrfs_full_stripe_locks_tree {
559 struct btrfs_block_group_cache {
560 struct btrfs_key key;
561 struct btrfs_block_group_item item;
562 struct btrfs_fs_info *fs_info;
570 u64 cache_generation;
573 * If the free space extent count exceeds this number, convert the block
576 u32 bitmap_high_thresh;
579 * If the free space extent count drops below this number, convert the
580 * block group back to extents.
582 u32 bitmap_low_thresh;
585 * It is just used for the delayed data space allocation because
586 * only the data space allocation and the relative metadata update
587 * can be done cross the transaction.
589 struct rw_semaphore data_rwsem;
591 /* for raid56, this is a full stripe, without parity */
592 unsigned long full_stripe_len;
596 unsigned int has_caching_ctl:1;
597 unsigned int removed:1;
599 int disk_cache_state;
601 /* cache tracking stuff */
603 struct btrfs_caching_control *caching_ctl;
604 u64 last_byte_to_unpin;
606 struct btrfs_space_info *space_info;
608 /* free space cache stuff */
609 struct btrfs_free_space_ctl *free_space_ctl;
611 /* block group cache stuff */
612 struct rb_node cache_node;
614 /* for block groups in the same raid type */
615 struct list_head list;
620 /* List of struct btrfs_free_clusters for this block group.
621 * Today it will only have one thing on it, but that may change
623 struct list_head cluster_list;
625 /* For delayed block group creation or deletion of empty block groups */
626 struct list_head bg_list;
628 /* For read-only block groups */
629 struct list_head ro_list;
633 /* For dirty block groups */
634 struct list_head dirty_list;
635 struct list_head io_list;
637 struct btrfs_io_ctl io_ctl;
640 * Incremented when doing extent allocations and holding a read lock
641 * on the space_info's groups_sem semaphore.
642 * Decremented when an ordered extent that represents an IO against this
643 * block group's range is created (after it's added to its inode's
644 * root's list of ordered extents) or immediately after the allocation
645 * if it's a metadata extent or fallocate extent (for these cases we
646 * don't create ordered extents).
648 atomic_t reservations;
651 * Incremented while holding the spinlock *lock* by a task checking if
652 * it can perform a nocow write (incremented if the value for the *ro*
653 * field is 0). Decremented by such tasks once they create an ordered
654 * extent or before that if some error happens before reaching that step.
655 * This is to prevent races between block group relocation and nocow
656 * writes through direct IO.
658 atomic_t nocow_writers;
660 /* Lock for free space tree operations. */
661 struct mutex free_space_lock;
664 * Does the block group need to be added to the free space tree?
665 * Protected by free_space_lock.
667 int needs_free_space;
669 /* Record locked full stripes for RAID5/6 block group */
670 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
673 /* delayed seq elem */
675 struct list_head list;
679 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
681 #define SEQ_LAST ((u64)-1)
683 enum btrfs_orphan_cleanup_state {
684 ORPHAN_CLEANUP_STARTED = 1,
685 ORPHAN_CLEANUP_DONE = 2,
688 /* used by the raid56 code to lock stripes for read/modify/write */
689 struct btrfs_stripe_hash {
690 struct list_head hash_list;
694 /* used by the raid56 code to lock stripes for read/modify/write */
695 struct btrfs_stripe_hash_table {
696 struct list_head stripe_cache;
697 spinlock_t cache_lock;
699 struct btrfs_stripe_hash table[];
702 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
704 void btrfs_init_async_reclaim_work(struct work_struct *work);
707 struct reloc_control;
709 struct btrfs_fs_devices;
710 struct btrfs_balance_control;
711 struct btrfs_delayed_root;
713 #define BTRFS_FS_BARRIER 1
714 #define BTRFS_FS_CLOSING_START 2
715 #define BTRFS_FS_CLOSING_DONE 3
716 #define BTRFS_FS_LOG_RECOVERING 4
717 #define BTRFS_FS_OPEN 5
718 #define BTRFS_FS_QUOTA_ENABLED 6
719 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
720 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
721 #define BTRFS_FS_BTREE_ERR 11
722 #define BTRFS_FS_LOG1_ERR 12
723 #define BTRFS_FS_LOG2_ERR 13
724 #define BTRFS_FS_QUOTA_OVERRIDE 14
725 /* Used to record internally whether fs has been frozen */
726 #define BTRFS_FS_FROZEN 15
729 * Indicate that a whole-filesystem exclusive operation is running
730 * (device replace, resize, device add/delete, balance)
732 #define BTRFS_FS_EXCL_OP 16
735 * To info transaction_kthread we need an immediate commit so it doesn't
736 * need to wait for commit_interval
738 #define BTRFS_FS_NEED_ASYNC_COMMIT 17
741 * Indicate that balance has been set up from the ioctl and is in the main
742 * phase. The fs_info::balance_ctl is initialized.
744 #define BTRFS_FS_BALANCE_RUNNING 18
746 struct btrfs_fs_info {
747 u8 fsid[BTRFS_FSID_SIZE];
748 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
750 struct btrfs_root *extent_root;
751 struct btrfs_root *tree_root;
752 struct btrfs_root *chunk_root;
753 struct btrfs_root *dev_root;
754 struct btrfs_root *fs_root;
755 struct btrfs_root *csum_root;
756 struct btrfs_root *quota_root;
757 struct btrfs_root *uuid_root;
758 struct btrfs_root *free_space_root;
760 /* the log root tree is a directory of all the other log roots */
761 struct btrfs_root *log_root_tree;
763 spinlock_t fs_roots_radix_lock;
764 struct radix_tree_root fs_roots_radix;
766 /* block group cache stuff */
767 spinlock_t block_group_cache_lock;
768 u64 first_logical_byte;
769 struct rb_root block_group_cache_tree;
771 /* keep track of unallocated space */
772 atomic64_t free_chunk_space;
774 struct extent_io_tree freed_extents[2];
775 struct extent_io_tree *pinned_extents;
777 /* logical->physical extent mapping */
778 struct btrfs_mapping_tree mapping_tree;
781 * block reservation for extent, checksum, root tree and
782 * delayed dir index item
784 struct btrfs_block_rsv global_block_rsv;
785 /* block reservation for metadata operations */
786 struct btrfs_block_rsv trans_block_rsv;
787 /* block reservation for chunk tree */
788 struct btrfs_block_rsv chunk_block_rsv;
789 /* block reservation for delayed operations */
790 struct btrfs_block_rsv delayed_block_rsv;
792 struct btrfs_block_rsv empty_block_rsv;
795 u64 last_trans_committed;
796 u64 avg_delayed_ref_runtime;
799 * this is updated to the current trans every time a full commit
800 * is required instead of the faster short fsync log commits
802 u64 last_trans_log_full_commit;
803 unsigned long mount_opt;
805 * Track requests for actions that need to be done during transaction
806 * commit (like for some mount options).
808 unsigned long pending_changes;
809 unsigned long compress_type:4;
810 unsigned int compress_level;
813 * It is a suggestive number, the read side is safe even it gets a
814 * wrong number because we will write out the data into a regular
815 * extent. The write side(mount/remount) is under ->s_umount lock,
816 * so it is also safe.
820 struct btrfs_transaction *running_transaction;
821 wait_queue_head_t transaction_throttle;
822 wait_queue_head_t transaction_wait;
823 wait_queue_head_t transaction_blocked_wait;
824 wait_queue_head_t async_submit_wait;
827 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
828 * when they are updated.
830 * Because we do not clear the flags for ever, so we needn't use
831 * the lock on the read side.
833 * We also needn't use the lock when we mount the fs, because
834 * there is no other task which will update the flag.
836 spinlock_t super_lock;
837 struct btrfs_super_block *super_copy;
838 struct btrfs_super_block *super_for_commit;
839 struct super_block *sb;
840 struct inode *btree_inode;
841 struct mutex tree_log_mutex;
842 struct mutex transaction_kthread_mutex;
843 struct mutex cleaner_mutex;
844 struct mutex chunk_mutex;
847 * this is taken to make sure we don't set block groups ro after
848 * the free space cache has been allocated on them
850 struct mutex ro_block_group_mutex;
852 /* this is used during read/modify/write to make sure
853 * no two ios are trying to mod the same stripe at the same
856 struct btrfs_stripe_hash_table *stripe_hash_table;
859 * this protects the ordered operations list only while we are
860 * processing all of the entries on it. This way we make
861 * sure the commit code doesn't find the list temporarily empty
862 * because another function happens to be doing non-waiting preflush
863 * before jumping into the main commit.
865 struct mutex ordered_operations_mutex;
867 struct rw_semaphore commit_root_sem;
869 struct rw_semaphore cleanup_work_sem;
871 struct rw_semaphore subvol_sem;
872 struct srcu_struct subvol_srcu;
874 spinlock_t trans_lock;
876 * the reloc mutex goes with the trans lock, it is taken
877 * during commit to protect us from the relocation code
879 struct mutex reloc_mutex;
881 struct list_head trans_list;
882 struct list_head dead_roots;
883 struct list_head caching_block_groups;
885 spinlock_t delayed_iput_lock;
886 struct list_head delayed_iputs;
887 struct mutex cleaner_delayed_iput_mutex;
889 /* this protects tree_mod_seq_list */
890 spinlock_t tree_mod_seq_lock;
891 atomic64_t tree_mod_seq;
892 struct list_head tree_mod_seq_list;
894 /* this protects tree_mod_log */
895 rwlock_t tree_mod_log_lock;
896 struct rb_root tree_mod_log;
898 atomic_t async_delalloc_pages;
901 * this is used to protect the following list -- ordered_roots.
903 spinlock_t ordered_root_lock;
906 * all fs/file tree roots in which there are data=ordered extents
907 * pending writeback are added into this list.
909 * these can span multiple transactions and basically include
910 * every dirty data page that isn't from nodatacow
912 struct list_head ordered_roots;
914 struct mutex delalloc_root_mutex;
915 spinlock_t delalloc_root_lock;
916 /* all fs/file tree roots that have delalloc inodes. */
917 struct list_head delalloc_roots;
920 * there is a pool of worker threads for checksumming during writes
921 * and a pool for checksumming after reads. This is because readers
922 * can run with FS locks held, and the writers may be waiting for
923 * those locks. We don't want ordering in the pending list to cause
924 * deadlocks, and so the two are serviced separately.
926 * A third pool does submit_bio to avoid deadlocking with the other
929 struct btrfs_workqueue *workers;
930 struct btrfs_workqueue *delalloc_workers;
931 struct btrfs_workqueue *flush_workers;
932 struct btrfs_workqueue *endio_workers;
933 struct btrfs_workqueue *endio_meta_workers;
934 struct btrfs_workqueue *endio_raid56_workers;
935 struct btrfs_workqueue *endio_repair_workers;
936 struct btrfs_workqueue *rmw_workers;
937 struct btrfs_workqueue *endio_meta_write_workers;
938 struct btrfs_workqueue *endio_write_workers;
939 struct btrfs_workqueue *endio_freespace_worker;
940 struct btrfs_workqueue *submit_workers;
941 struct btrfs_workqueue *caching_workers;
942 struct btrfs_workqueue *readahead_workers;
945 * fixup workers take dirty pages that didn't properly go through
946 * the cow mechanism and make them safe to write. It happens
947 * for the sys_munmap function call path
949 struct btrfs_workqueue *fixup_workers;
950 struct btrfs_workqueue *delayed_workers;
952 /* the extent workers do delayed refs on the extent allocation tree */
953 struct btrfs_workqueue *extent_workers;
954 struct task_struct *transaction_kthread;
955 struct task_struct *cleaner_kthread;
956 u32 thread_pool_size;
958 struct kobject *space_info_kobj;
959 struct list_head pending_raid_kobjs;
960 spinlock_t pending_raid_kobjs_lock; /* uncontended */
964 /* used to keep from writing metadata until there is a nice batch */
965 struct percpu_counter dirty_metadata_bytes;
966 struct percpu_counter delalloc_bytes;
967 s32 dirty_metadata_batch;
970 struct list_head dirty_cowonly_roots;
972 struct btrfs_fs_devices *fs_devices;
975 * The space_info list is effectively read only after initial
976 * setup. It is populated at mount time and cleaned up after
977 * all block groups are removed. RCU is used to protect it.
979 struct list_head space_info;
981 struct btrfs_space_info *data_sinfo;
983 struct reloc_control *reloc_ctl;
985 /* data_alloc_cluster is only used in ssd_spread mode */
986 struct btrfs_free_cluster data_alloc_cluster;
988 /* all metadata allocations go through this cluster */
989 struct btrfs_free_cluster meta_alloc_cluster;
991 /* auto defrag inodes go here */
992 spinlock_t defrag_inodes_lock;
993 struct rb_root defrag_inodes;
994 atomic_t defrag_running;
996 /* Used to protect avail_{data, metadata, system}_alloc_bits */
997 seqlock_t profiles_lock;
999 * these three are in extended format (availability of single
1000 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1001 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1003 u64 avail_data_alloc_bits;
1004 u64 avail_metadata_alloc_bits;
1005 u64 avail_system_alloc_bits;
1007 /* restriper state */
1008 spinlock_t balance_lock;
1009 struct mutex balance_mutex;
1010 atomic_t balance_pause_req;
1011 atomic_t balance_cancel_req;
1012 struct btrfs_balance_control *balance_ctl;
1013 wait_queue_head_t balance_wait_q;
1015 u32 data_chunk_allocations;
1020 /* private scrub information */
1021 struct mutex scrub_lock;
1022 atomic_t scrubs_running;
1023 atomic_t scrub_pause_req;
1024 atomic_t scrubs_paused;
1025 atomic_t scrub_cancel_req;
1026 wait_queue_head_t scrub_pause_wait;
1027 int scrub_workers_refcnt;
1028 struct btrfs_workqueue *scrub_workers;
1029 struct btrfs_workqueue *scrub_wr_completion_workers;
1030 struct btrfs_workqueue *scrub_nocow_workers;
1031 struct btrfs_workqueue *scrub_parity_workers;
1033 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1034 u32 check_integrity_print_mask;
1036 /* is qgroup tracking in a consistent state? */
1039 /* holds configuration and tracking. Protected by qgroup_lock */
1040 struct rb_root qgroup_tree;
1041 struct rb_root qgroup_op_tree;
1042 spinlock_t qgroup_lock;
1043 spinlock_t qgroup_op_lock;
1044 atomic_t qgroup_op_seq;
1047 * used to avoid frequently calling ulist_alloc()/ulist_free()
1048 * when doing qgroup accounting, it must be protected by qgroup_lock.
1050 struct ulist *qgroup_ulist;
1052 /* protect user change for quota operations */
1053 struct mutex qgroup_ioctl_lock;
1055 /* list of dirty qgroups to be written at next commit */
1056 struct list_head dirty_qgroups;
1058 /* used by qgroup for an efficient tree traversal */
1061 /* qgroup rescan items */
1062 struct mutex qgroup_rescan_lock; /* protects the progress item */
1063 struct btrfs_key qgroup_rescan_progress;
1064 struct btrfs_workqueue *qgroup_rescan_workers;
1065 struct completion qgroup_rescan_completion;
1066 struct btrfs_work qgroup_rescan_work;
1067 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1069 /* filesystem state */
1070 unsigned long fs_state;
1072 struct btrfs_delayed_root *delayed_root;
1074 /* readahead tree */
1075 spinlock_t reada_lock;
1076 struct radix_tree_root reada_tree;
1078 /* readahead works cnt */
1079 atomic_t reada_works_cnt;
1081 /* Extent buffer radix tree */
1082 spinlock_t buffer_lock;
1083 struct radix_tree_root buffer_radix;
1085 /* next backup root to be overwritten */
1086 int backup_root_index;
1088 /* device replace state */
1089 struct btrfs_dev_replace dev_replace;
1091 struct percpu_counter bio_counter;
1092 wait_queue_head_t replace_wait;
1094 struct semaphore uuid_tree_rescan_sem;
1096 /* Used to reclaim the metadata space in the background. */
1097 struct work_struct async_reclaim_work;
1099 spinlock_t unused_bgs_lock;
1100 struct list_head unused_bgs;
1101 struct mutex unused_bg_unpin_mutex;
1102 struct mutex delete_unused_bgs_mutex;
1104 /* For btrfs to record security options */
1105 struct security_mnt_opts security_opts;
1108 * Chunks that can't be freed yet (under a trim/discard operation)
1109 * and will be latter freed. Protected by fs_info->chunk_mutex.
1111 struct list_head pinned_chunks;
1113 /* Cached block sizes */
1118 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1119 spinlock_t ref_verify_lock;
1120 struct rb_root block_tree;
1124 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1126 return sb->s_fs_info;
1129 struct btrfs_subvolume_writers {
1130 struct percpu_counter counter;
1131 wait_queue_head_t wait;
1135 * The state of btrfs root
1138 * btrfs_record_root_in_trans is a multi-step process,
1139 * and it can race with the balancing code. But the
1140 * race is very small, and only the first time the root
1141 * is added to each transaction. So IN_TRANS_SETUP
1142 * is used to tell us when more checks are required
1144 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1145 #define BTRFS_ROOT_REF_COWS 1
1146 #define BTRFS_ROOT_TRACK_DIRTY 2
1147 #define BTRFS_ROOT_IN_RADIX 3
1148 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1149 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1150 #define BTRFS_ROOT_FORCE_COW 6
1151 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1152 #define BTRFS_ROOT_DIRTY 8
1155 * in ram representation of the tree. extent_root is used for all allocations
1156 * and for the extent tree extent_root root.
1159 struct extent_buffer *node;
1161 struct extent_buffer *commit_root;
1162 struct btrfs_root *log_root;
1163 struct btrfs_root *reloc_root;
1165 unsigned long state;
1166 struct btrfs_root_item root_item;
1167 struct btrfs_key root_key;
1168 struct btrfs_fs_info *fs_info;
1169 struct extent_io_tree dirty_log_pages;
1171 struct mutex objectid_mutex;
1173 spinlock_t accounting_lock;
1174 struct btrfs_block_rsv *block_rsv;
1176 /* free ino cache stuff */
1177 struct btrfs_free_space_ctl *free_ino_ctl;
1178 enum btrfs_caching_type ino_cache_state;
1179 spinlock_t ino_cache_lock;
1180 wait_queue_head_t ino_cache_wait;
1181 struct btrfs_free_space_ctl *free_ino_pinned;
1182 u64 ino_cache_progress;
1183 struct inode *ino_cache_inode;
1185 struct mutex log_mutex;
1186 wait_queue_head_t log_writer_wait;
1187 wait_queue_head_t log_commit_wait[2];
1188 struct list_head log_ctxs[2];
1189 atomic_t log_writers;
1190 atomic_t log_commit[2];
1193 /* No matter the commit succeeds or not*/
1194 int log_transid_committed;
1195 /* Just be updated when the commit succeeds. */
1196 int last_log_commit;
1197 pid_t log_start_pid;
1203 u64 highest_objectid;
1205 u64 defrag_trans_start;
1206 struct btrfs_key defrag_progress;
1207 struct btrfs_key defrag_max;
1209 /* the dirty list is only used by non-reference counted roots */
1210 struct list_head dirty_list;
1212 struct list_head root_list;
1214 spinlock_t log_extents_lock[2];
1215 struct list_head logged_list[2];
1217 int orphan_cleanup_state;
1219 spinlock_t inode_lock;
1220 /* red-black tree that keeps track of in-memory inodes */
1221 struct rb_root inode_tree;
1224 * radix tree that keeps track of delayed nodes of every inode,
1225 * protected by inode_lock
1227 struct radix_tree_root delayed_nodes_tree;
1229 * right now this just gets used so that a root has its own devid
1230 * for stat. It may be used for more later
1234 spinlock_t root_item_lock;
1237 struct mutex delalloc_mutex;
1238 spinlock_t delalloc_lock;
1240 * all of the inodes that have delalloc bytes. It is possible for
1241 * this list to be empty even when there is still dirty data=ordered
1242 * extents waiting to finish IO.
1244 struct list_head delalloc_inodes;
1245 struct list_head delalloc_root;
1246 u64 nr_delalloc_inodes;
1248 struct mutex ordered_extent_mutex;
1250 * this is used by the balancing code to wait for all the pending
1253 spinlock_t ordered_extent_lock;
1256 * all of the data=ordered extents pending writeback
1257 * these can span multiple transactions and basically include
1258 * every dirty data page that isn't from nodatacow
1260 struct list_head ordered_extents;
1261 struct list_head ordered_root;
1262 u64 nr_ordered_extents;
1265 * Number of currently running SEND ioctls to prevent
1266 * manipulation with the read-only status via SUBVOL_SETFLAGS
1268 int send_in_progress;
1269 struct btrfs_subvolume_writers *subv_writers;
1270 atomic_t will_be_snapshotted;
1271 atomic_t snapshot_force_cow;
1273 /* For qgroup metadata reserved space */
1274 spinlock_t qgroup_meta_rsv_lock;
1275 u64 qgroup_meta_rsv_pertrans;
1276 u64 qgroup_meta_rsv_prealloc;
1278 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1283 struct btrfs_file_private {
1287 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1289 return btrfs_sb(inode->i_sb)->sectorsize;
1292 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1295 return info->nodesize - sizeof(struct btrfs_header);
1298 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1300 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1302 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1305 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1307 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1310 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1311 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1312 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1314 return BTRFS_MAX_ITEM_SIZE(info) -
1315 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1318 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1320 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1324 * Flags for mount options.
1326 * Note: don't forget to add new options to btrfs_show_options()
1328 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1329 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1330 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1331 #define BTRFS_MOUNT_SSD (1 << 3)
1332 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1333 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1334 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1335 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1336 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1337 #define BTRFS_MOUNT_NOSSD (1 << 9)
1338 #define BTRFS_MOUNT_DISCARD (1 << 10)
1339 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1340 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1341 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1342 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1343 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1344 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1345 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1346 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1347 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1348 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1349 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1350 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1351 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1352 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1353 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1354 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1355 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1356 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1358 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1359 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1361 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1362 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1363 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1364 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1367 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1369 if (!btrfs_test_opt(fs_info, opt)) \
1370 btrfs_info(fs_info, fmt, ##args); \
1371 btrfs_set_opt(fs_info->mount_opt, opt); \
1374 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1376 if (btrfs_test_opt(fs_info, opt)) \
1377 btrfs_info(fs_info, fmt, ##args); \
1378 btrfs_clear_opt(fs_info->mount_opt, opt); \
1381 #ifdef CONFIG_BTRFS_DEBUG
1383 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1385 struct btrfs_fs_info *fs_info = block_group->fs_info;
1387 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1388 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1389 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1390 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1395 * Requests for changes that need to be done during transaction commit.
1397 * Internal mount options that are used for special handling of the real
1398 * mount options (eg. cannot be set during remount and have to be set during
1399 * transaction commit)
1402 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1403 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1404 #define BTRFS_PENDING_COMMIT (2)
1406 #define btrfs_test_pending(info, opt) \
1407 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1408 #define btrfs_set_pending(info, opt) \
1409 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1410 #define btrfs_clear_pending(info, opt) \
1411 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1414 * Helpers for setting pending mount option changes.
1416 * Expects corresponding macros
1417 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1419 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1421 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1422 btrfs_info((info), fmt, ##args); \
1423 btrfs_set_pending((info), SET_##opt); \
1424 btrfs_clear_pending((info), CLEAR_##opt); \
1428 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1430 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1431 btrfs_info((info), fmt, ##args); \
1432 btrfs_set_pending((info), CLEAR_##opt); \
1433 btrfs_clear_pending((info), SET_##opt); \
1440 #define BTRFS_INODE_NODATASUM (1 << 0)
1441 #define BTRFS_INODE_NODATACOW (1 << 1)
1442 #define BTRFS_INODE_READONLY (1 << 2)
1443 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1444 #define BTRFS_INODE_PREALLOC (1 << 4)
1445 #define BTRFS_INODE_SYNC (1 << 5)
1446 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1447 #define BTRFS_INODE_APPEND (1 << 7)
1448 #define BTRFS_INODE_NODUMP (1 << 8)
1449 #define BTRFS_INODE_NOATIME (1 << 9)
1450 #define BTRFS_INODE_DIRSYNC (1 << 10)
1451 #define BTRFS_INODE_COMPRESS (1 << 11)
1453 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1455 struct btrfs_map_token {
1456 const struct extent_buffer *eb;
1458 unsigned long offset;
1461 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1462 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1464 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1466 token->kaddr = NULL;
1469 /* some macros to generate set/get functions for the struct fields. This
1470 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1473 #define le8_to_cpu(v) (v)
1474 #define cpu_to_le8(v) (v)
1477 #define read_eb_member(eb, ptr, type, member, result) (\
1478 read_extent_buffer(eb, (char *)(result), \
1479 ((unsigned long)(ptr)) + \
1480 offsetof(type, member), \
1481 sizeof(((type *)0)->member)))
1483 #define write_eb_member(eb, ptr, type, member, result) (\
1484 write_extent_buffer(eb, (char *)(result), \
1485 ((unsigned long)(ptr)) + \
1486 offsetof(type, member), \
1487 sizeof(((type *)0)->member)))
1489 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1490 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1491 const void *ptr, unsigned long off, \
1492 struct btrfs_map_token *token); \
1493 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1494 unsigned long off, u##bits val, \
1495 struct btrfs_map_token *token); \
1496 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1498 unsigned long off) \
1500 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1502 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1503 unsigned long off, u##bits val) \
1505 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1508 DECLARE_BTRFS_SETGET_BITS(8)
1509 DECLARE_BTRFS_SETGET_BITS(16)
1510 DECLARE_BTRFS_SETGET_BITS(32)
1511 DECLARE_BTRFS_SETGET_BITS(64)
1513 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1514 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1517 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1518 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1520 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1523 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1524 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1526 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1528 struct btrfs_map_token *token) \
1530 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1531 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1533 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1534 type *s, u##bits val, \
1535 struct btrfs_map_token *token) \
1537 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1538 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1541 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1542 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1544 const type *p = page_address(eb->pages[0]); \
1545 u##bits res = le##bits##_to_cpu(p->member); \
1548 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1551 type *p = page_address(eb->pages[0]); \
1552 p->member = cpu_to_le##bits(val); \
1555 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1556 static inline u##bits btrfs_##name(const type *s) \
1558 return le##bits##_to_cpu(s->member); \
1560 static inline void btrfs_set_##name(type *s, u##bits val) \
1562 s->member = cpu_to_le##bits(val); \
1566 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1567 struct btrfs_dev_item *s)
1569 BUILD_BUG_ON(sizeof(u64) !=
1570 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1571 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1574 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1575 struct btrfs_dev_item *s,
1578 BUILD_BUG_ON(sizeof(u64) !=
1579 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1580 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1581 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1585 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1586 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1587 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1588 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1589 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1591 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1592 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1593 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1594 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1595 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1596 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1598 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1599 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1601 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1603 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1605 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1607 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1609 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1610 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1612 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1614 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1616 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1619 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1621 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1624 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1626 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1629 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1630 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1631 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1632 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1633 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1634 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1635 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1636 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1637 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1638 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1639 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1641 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1643 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1646 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1647 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1648 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1650 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1652 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1654 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1656 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1659 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1661 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1662 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1664 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1667 unsigned long offset = (unsigned long)c;
1668 offset += offsetof(struct btrfs_chunk, stripe);
1669 offset += nr * sizeof(struct btrfs_stripe);
1670 return (struct btrfs_stripe *)offset;
1673 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1675 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1678 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1679 struct btrfs_chunk *c, int nr)
1681 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1684 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1685 struct btrfs_chunk *c, int nr)
1687 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1690 /* struct btrfs_block_group_item */
1691 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1693 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1695 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1696 struct btrfs_block_group_item, chunk_objectid, 64);
1698 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1699 struct btrfs_block_group_item, chunk_objectid, 64);
1700 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1701 struct btrfs_block_group_item, flags, 64);
1702 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1703 struct btrfs_block_group_item, flags, 64);
1705 /* struct btrfs_free_space_info */
1706 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1708 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1710 /* struct btrfs_inode_ref */
1711 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1712 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1714 /* struct btrfs_inode_extref */
1715 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1716 parent_objectid, 64);
1717 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1719 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1721 /* struct btrfs_inode_item */
1722 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1723 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1724 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1725 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1726 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1727 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1728 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1729 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1730 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1731 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1732 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1733 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1734 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1736 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1738 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1740 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1741 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1743 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1746 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1751 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1752 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1753 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1754 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1756 /* struct btrfs_dev_extent */
1757 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1759 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1760 chunk_objectid, 64);
1761 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1763 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1765 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1767 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1768 return (unsigned long)dev + ptr;
1771 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1772 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1774 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1776 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1779 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1781 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1782 struct btrfs_tree_block_info *item,
1783 struct btrfs_disk_key *key)
1785 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1788 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1789 struct btrfs_tree_block_info *item,
1790 struct btrfs_disk_key *key)
1792 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1795 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1797 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1799 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1801 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1804 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1807 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1809 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1812 static inline u32 btrfs_extent_inline_ref_size(int type)
1814 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1815 type == BTRFS_SHARED_BLOCK_REF_KEY)
1816 return sizeof(struct btrfs_extent_inline_ref);
1817 if (type == BTRFS_SHARED_DATA_REF_KEY)
1818 return sizeof(struct btrfs_shared_data_ref) +
1819 sizeof(struct btrfs_extent_inline_ref);
1820 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1821 return sizeof(struct btrfs_extent_data_ref) +
1822 offsetof(struct btrfs_extent_inline_ref, offset);
1826 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1827 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1829 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1830 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1832 /* struct btrfs_node */
1833 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1834 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1835 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1837 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1840 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1843 ptr = offsetof(struct btrfs_node, ptrs) +
1844 sizeof(struct btrfs_key_ptr) * nr;
1845 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1848 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1852 ptr = offsetof(struct btrfs_node, ptrs) +
1853 sizeof(struct btrfs_key_ptr) * nr;
1854 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1857 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1860 ptr = offsetof(struct btrfs_node, ptrs) +
1861 sizeof(struct btrfs_key_ptr) * nr;
1862 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1865 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1869 ptr = offsetof(struct btrfs_node, ptrs) +
1870 sizeof(struct btrfs_key_ptr) * nr;
1871 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1874 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1876 return offsetof(struct btrfs_node, ptrs) +
1877 sizeof(struct btrfs_key_ptr) * nr;
1880 void btrfs_node_key(const struct extent_buffer *eb,
1881 struct btrfs_disk_key *disk_key, int nr);
1883 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1884 struct btrfs_disk_key *disk_key, int nr)
1887 ptr = btrfs_node_key_ptr_offset(nr);
1888 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1889 struct btrfs_key_ptr, key, disk_key);
1892 /* struct btrfs_item */
1893 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1894 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1895 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1896 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1898 static inline unsigned long btrfs_item_nr_offset(int nr)
1900 return offsetof(struct btrfs_leaf, items) +
1901 sizeof(struct btrfs_item) * nr;
1904 static inline struct btrfs_item *btrfs_item_nr(int nr)
1906 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1909 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1910 struct btrfs_item *item)
1912 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1915 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1917 return btrfs_item_end(eb, btrfs_item_nr(nr));
1920 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1922 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1925 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1927 return btrfs_item_size(eb, btrfs_item_nr(nr));
1930 static inline void btrfs_item_key(const struct extent_buffer *eb,
1931 struct btrfs_disk_key *disk_key, int nr)
1933 struct btrfs_item *item = btrfs_item_nr(nr);
1934 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1937 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1938 struct btrfs_disk_key *disk_key, int nr)
1940 struct btrfs_item *item = btrfs_item_nr(nr);
1941 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1944 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1947 * struct btrfs_root_ref
1949 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1950 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1951 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1953 /* struct btrfs_dir_item */
1954 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1955 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1956 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1957 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1958 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1959 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1961 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1963 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1966 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1967 const struct btrfs_dir_item *item,
1968 struct btrfs_disk_key *key)
1970 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1973 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1974 struct btrfs_dir_item *item,
1975 const struct btrfs_disk_key *key)
1977 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1980 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1982 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1984 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1987 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1988 const struct btrfs_free_space_header *h,
1989 struct btrfs_disk_key *key)
1991 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1994 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1995 struct btrfs_free_space_header *h,
1996 const struct btrfs_disk_key *key)
1998 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2001 /* struct btrfs_disk_key */
2002 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2004 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2005 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2007 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2008 const struct btrfs_disk_key *disk)
2010 cpu->offset = le64_to_cpu(disk->offset);
2011 cpu->type = disk->type;
2012 cpu->objectid = le64_to_cpu(disk->objectid);
2015 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2016 const struct btrfs_key *cpu)
2018 disk->offset = cpu_to_le64(cpu->offset);
2019 disk->type = cpu->type;
2020 disk->objectid = cpu_to_le64(cpu->objectid);
2023 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2024 struct btrfs_key *key, int nr)
2026 struct btrfs_disk_key disk_key;
2027 btrfs_node_key(eb, &disk_key, nr);
2028 btrfs_disk_key_to_cpu(key, &disk_key);
2031 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2032 struct btrfs_key *key, int nr)
2034 struct btrfs_disk_key disk_key;
2035 btrfs_item_key(eb, &disk_key, nr);
2036 btrfs_disk_key_to_cpu(key, &disk_key);
2039 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2040 const struct btrfs_dir_item *item,
2041 struct btrfs_key *key)
2043 struct btrfs_disk_key disk_key;
2044 btrfs_dir_item_key(eb, item, &disk_key);
2045 btrfs_disk_key_to_cpu(key, &disk_key);
2048 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2053 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2058 /* struct btrfs_header */
2059 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2060 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2062 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2063 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2064 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2065 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2066 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2068 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2069 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2071 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2073 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2075 return (btrfs_header_flags(eb) & flag) == flag;
2078 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2080 u64 flags = btrfs_header_flags(eb);
2081 btrfs_set_header_flags(eb, flags | flag);
2082 return (flags & flag) == flag;
2085 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2087 u64 flags = btrfs_header_flags(eb);
2088 btrfs_set_header_flags(eb, flags & ~flag);
2089 return (flags & flag) == flag;
2092 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2094 u64 flags = btrfs_header_flags(eb);
2095 return flags >> BTRFS_BACKREF_REV_SHIFT;
2098 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2101 u64 flags = btrfs_header_flags(eb);
2102 flags &= ~BTRFS_BACKREF_REV_MASK;
2103 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2104 btrfs_set_header_flags(eb, flags);
2107 static inline unsigned long btrfs_header_fsid(void)
2109 return offsetof(struct btrfs_header, fsid);
2112 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2114 return offsetof(struct btrfs_header, chunk_tree_uuid);
2117 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2119 return btrfs_header_level(eb) == 0;
2122 /* struct btrfs_root_item */
2123 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2125 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2126 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2127 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2129 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2131 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2132 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2133 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2134 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2135 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2136 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2137 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2138 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2140 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2142 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2144 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2146 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2148 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2151 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2153 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2156 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2158 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2161 /* struct btrfs_root_backup */
2162 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2164 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2166 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2167 tree_root_level, 8);
2169 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2171 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2172 chunk_root_gen, 64);
2173 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2174 chunk_root_level, 8);
2176 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2178 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2179 extent_root_gen, 64);
2180 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2181 extent_root_level, 8);
2183 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2185 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2187 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2190 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2192 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2194 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2197 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2199 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2201 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2202 csum_root_level, 8);
2203 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2205 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2207 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2210 /* struct btrfs_balance_item */
2211 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2213 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2214 const struct btrfs_balance_item *bi,
2215 struct btrfs_disk_balance_args *ba)
2217 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2220 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2221 struct btrfs_balance_item *bi,
2222 const struct btrfs_disk_balance_args *ba)
2224 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2227 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2228 const struct btrfs_balance_item *bi,
2229 struct btrfs_disk_balance_args *ba)
2231 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2234 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2235 struct btrfs_balance_item *bi,
2236 const struct btrfs_disk_balance_args *ba)
2238 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2241 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2242 const struct btrfs_balance_item *bi,
2243 struct btrfs_disk_balance_args *ba)
2245 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2248 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2249 struct btrfs_balance_item *bi,
2250 const struct btrfs_disk_balance_args *ba)
2252 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2256 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2257 const struct btrfs_disk_balance_args *disk)
2259 memset(cpu, 0, sizeof(*cpu));
2261 cpu->profiles = le64_to_cpu(disk->profiles);
2262 cpu->usage = le64_to_cpu(disk->usage);
2263 cpu->devid = le64_to_cpu(disk->devid);
2264 cpu->pstart = le64_to_cpu(disk->pstart);
2265 cpu->pend = le64_to_cpu(disk->pend);
2266 cpu->vstart = le64_to_cpu(disk->vstart);
2267 cpu->vend = le64_to_cpu(disk->vend);
2268 cpu->target = le64_to_cpu(disk->target);
2269 cpu->flags = le64_to_cpu(disk->flags);
2270 cpu->limit = le64_to_cpu(disk->limit);
2271 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2272 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2276 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2277 const struct btrfs_balance_args *cpu)
2279 memset(disk, 0, sizeof(*disk));
2281 disk->profiles = cpu_to_le64(cpu->profiles);
2282 disk->usage = cpu_to_le64(cpu->usage);
2283 disk->devid = cpu_to_le64(cpu->devid);
2284 disk->pstart = cpu_to_le64(cpu->pstart);
2285 disk->pend = cpu_to_le64(cpu->pend);
2286 disk->vstart = cpu_to_le64(cpu->vstart);
2287 disk->vend = cpu_to_le64(cpu->vend);
2288 disk->target = cpu_to_le64(cpu->target);
2289 disk->flags = cpu_to_le64(cpu->flags);
2290 disk->limit = cpu_to_le64(cpu->limit);
2291 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2292 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2295 /* struct btrfs_super_block */
2296 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2297 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2298 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2300 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2301 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2302 struct btrfs_super_block, sys_chunk_array_size, 32);
2303 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2304 struct btrfs_super_block, chunk_root_generation, 64);
2305 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2307 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2309 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2310 chunk_root_level, 8);
2311 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2313 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2314 log_root_transid, 64);
2315 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2317 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2319 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2321 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2323 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2325 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2327 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2328 root_dir_objectid, 64);
2329 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2331 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2333 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2334 compat_ro_flags, 64);
2335 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2336 incompat_flags, 64);
2337 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2339 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2340 cache_generation, 64);
2341 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2342 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2343 uuid_tree_generation, 64);
2345 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2347 u16 t = btrfs_super_csum_type(s);
2349 * csum type is validated at mount time
2351 return btrfs_csum_sizes[t];
2356 * The leaf data grows from end-to-front in the node.
2357 * this returns the address of the start of the last item,
2358 * which is the stop of the leaf data stack
2360 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2361 const struct extent_buffer *leaf)
2363 u32 nr = btrfs_header_nritems(leaf);
2366 return BTRFS_LEAF_DATA_SIZE(fs_info);
2367 return btrfs_item_offset_nr(leaf, nr - 1);
2370 /* struct btrfs_file_extent_item */
2371 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2372 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2373 struct btrfs_file_extent_item, disk_bytenr, 64);
2374 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2375 struct btrfs_file_extent_item, offset, 64);
2376 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2377 struct btrfs_file_extent_item, generation, 64);
2378 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2379 struct btrfs_file_extent_item, num_bytes, 64);
2380 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2381 struct btrfs_file_extent_item, disk_num_bytes, 64);
2382 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2383 struct btrfs_file_extent_item, compression, 8);
2385 static inline unsigned long
2386 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2388 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2391 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2393 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2396 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2398 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2400 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2401 disk_num_bytes, 64);
2402 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2404 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2406 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2408 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2410 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2412 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2413 other_encoding, 16);
2416 * this returns the number of bytes used by the item on disk, minus the
2417 * size of any extent headers. If a file is compressed on disk, this is
2418 * the compressed size
2420 static inline u32 btrfs_file_extent_inline_item_len(
2421 const struct extent_buffer *eb,
2422 struct btrfs_item *e)
2424 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2427 /* btrfs_dev_stats_item */
2428 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2429 const struct btrfs_dev_stats_item *ptr,
2434 read_extent_buffer(eb, &val,
2435 offsetof(struct btrfs_dev_stats_item, values) +
2436 ((unsigned long)ptr) + (index * sizeof(u64)),
2441 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2442 struct btrfs_dev_stats_item *ptr,
2445 write_extent_buffer(eb, &val,
2446 offsetof(struct btrfs_dev_stats_item, values) +
2447 ((unsigned long)ptr) + (index * sizeof(u64)),
2451 /* btrfs_qgroup_status_item */
2452 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2454 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2456 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2458 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2461 /* btrfs_qgroup_info_item */
2462 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2464 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2465 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2467 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2468 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2471 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2472 struct btrfs_qgroup_info_item, generation, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2475 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2476 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2477 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2479 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2480 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2482 /* btrfs_qgroup_limit_item */
2483 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2485 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2487 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2489 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2491 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2494 /* btrfs_dev_replace_item */
2495 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2496 struct btrfs_dev_replace_item, src_devid, 64);
2497 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2498 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2500 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2502 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2504 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2506 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2507 num_write_errors, 64);
2508 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2509 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2511 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2513 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2516 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2517 struct btrfs_dev_replace_item, src_devid, 64);
2518 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2519 struct btrfs_dev_replace_item,
2520 cont_reading_from_srcdev_mode, 64);
2521 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2522 struct btrfs_dev_replace_item, replace_state, 64);
2523 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2524 struct btrfs_dev_replace_item, time_started, 64);
2525 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2526 struct btrfs_dev_replace_item, time_stopped, 64);
2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2528 struct btrfs_dev_replace_item, num_write_errors, 64);
2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2530 struct btrfs_dev_replace_item,
2531 num_uncorrectable_read_errors, 64);
2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2533 struct btrfs_dev_replace_item, cursor_left, 64);
2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2535 struct btrfs_dev_replace_item, cursor_right, 64);
2537 /* helper function to cast into the data area of the leaf. */
2538 #define btrfs_item_ptr(leaf, slot, type) \
2539 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2540 btrfs_item_offset_nr(leaf, slot)))
2542 #define btrfs_item_ptr_offset(leaf, slot) \
2543 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2544 btrfs_item_offset_nr(leaf, slot)))
2546 static inline u64 btrfs_name_hash(const char *name, int len)
2548 return crc32c((u32)~1, name, len);
2552 * Figure the key offset of an extended inode ref
2554 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2557 return (u64) crc32c(parent_objectid, name, len);
2560 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2562 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2563 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2566 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2568 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2573 enum btrfs_inline_ref_type {
2574 BTRFS_REF_TYPE_INVALID = 0,
2575 BTRFS_REF_TYPE_BLOCK = 1,
2576 BTRFS_REF_TYPE_DATA = 2,
2577 BTRFS_REF_TYPE_ANY = 3,
2580 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2581 struct btrfs_extent_inline_ref *iref,
2582 enum btrfs_inline_ref_type is_data);
2584 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2586 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2589 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2593 * Doing a truncate won't result in new nodes or leaves, just what we need for
2596 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2599 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2602 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2603 struct btrfs_fs_info *fs_info);
2604 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2605 struct btrfs_fs_info *fs_info);
2606 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2608 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2609 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2610 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2611 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2612 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2613 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2614 unsigned long count);
2615 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2616 unsigned long count, u64 transid, int wait);
2617 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2618 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2619 struct btrfs_fs_info *fs_info, u64 bytenr,
2620 u64 offset, int metadata, u64 *refs, u64 *flags);
2621 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2622 u64 bytenr, u64 num, int reserved);
2623 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2624 u64 bytenr, u64 num_bytes);
2625 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2626 struct extent_buffer *eb);
2627 int btrfs_cross_ref_exist(struct btrfs_root *root,
2628 u64 objectid, u64 offset, u64 bytenr);
2629 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2630 struct btrfs_fs_info *info,
2632 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2633 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2634 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2635 struct btrfs_root *root,
2636 u64 parent, u64 root_objectid,
2637 const struct btrfs_disk_key *key,
2638 int level, u64 hint,
2640 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2641 struct btrfs_root *root,
2642 struct extent_buffer *buf,
2643 u64 parent, int last_ref);
2644 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2645 struct btrfs_root *root, u64 owner,
2646 u64 offset, u64 ram_bytes,
2647 struct btrfs_key *ins);
2648 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2649 u64 root_objectid, u64 owner, u64 offset,
2650 struct btrfs_key *ins);
2651 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2652 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2653 struct btrfs_key *ins, int is_data, int delalloc);
2654 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2655 struct extent_buffer *buf, int full_backref);
2656 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2657 struct extent_buffer *buf, int full_backref);
2658 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2659 struct btrfs_fs_info *fs_info,
2660 u64 bytenr, u64 num_bytes, u64 flags,
2661 int level, int is_data);
2662 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2663 struct btrfs_root *root,
2664 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2665 u64 owner, u64 offset);
2667 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2668 u64 start, u64 len, int delalloc);
2669 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2670 u64 start, u64 len);
2671 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2672 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2673 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2674 struct btrfs_root *root,
2675 u64 bytenr, u64 num_bytes, u64 parent,
2676 u64 root_objectid, u64 owner, u64 offset);
2678 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2679 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2680 struct btrfs_fs_info *fs_info);
2681 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2682 struct btrfs_fs_info *fs_info);
2683 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2684 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2685 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2686 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2687 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2688 u64 bytes_used, u64 type, u64 chunk_offset,
2690 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2691 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2692 struct btrfs_fs_info *fs_info,
2693 const u64 chunk_offset);
2694 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2695 u64 group_start, struct extent_map *em);
2696 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2697 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2698 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2699 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2700 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2701 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2702 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2703 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2705 enum btrfs_reserve_flush_enum {
2706 /* If we are in the transaction, we can't flush anything.*/
2707 BTRFS_RESERVE_NO_FLUSH,
2709 * Flushing delalloc may cause deadlock somewhere, in this
2710 * case, use FLUSH LIMIT
2712 BTRFS_RESERVE_FLUSH_LIMIT,
2713 BTRFS_RESERVE_FLUSH_ALL,
2716 enum btrfs_flush_state {
2717 FLUSH_DELAYED_ITEMS_NR = 1,
2718 FLUSH_DELAYED_ITEMS = 2,
2720 FLUSH_DELALLOC_WAIT = 4,
2725 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2726 int btrfs_check_data_free_space(struct inode *inode,
2727 struct extent_changeset **reserved, u64 start, u64 len);
2728 void btrfs_free_reserved_data_space(struct inode *inode,
2729 struct extent_changeset *reserved, u64 start, u64 len);
2730 void btrfs_delalloc_release_space(struct inode *inode,
2731 struct extent_changeset *reserved,
2732 u64 start, u64 len, bool qgroup_free);
2733 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2735 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2736 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2737 struct btrfs_block_rsv *rsv,
2738 int nitems, bool use_global_rsv);
2739 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2740 struct btrfs_block_rsv *rsv);
2741 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2744 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2745 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2747 int btrfs_delalloc_reserve_space(struct inode *inode,
2748 struct extent_changeset **reserved, u64 start, u64 len);
2749 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2750 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2751 unsigned short type);
2752 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2753 struct btrfs_block_rsv *rsv,
2754 unsigned short type);
2755 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2756 struct btrfs_block_rsv *rsv);
2757 int btrfs_block_rsv_add(struct btrfs_root *root,
2758 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2759 enum btrfs_reserve_flush_enum flush);
2760 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2761 int btrfs_block_rsv_refill(struct btrfs_root *root,
2762 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2763 enum btrfs_reserve_flush_enum flush);
2764 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2765 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2767 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2768 struct btrfs_block_rsv *dest, u64 num_bytes,
2770 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2771 struct btrfs_block_rsv *block_rsv,
2773 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2774 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2775 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2776 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2777 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2778 u64 start, u64 end);
2779 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2780 u64 num_bytes, u64 *actual_bytes);
2781 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2782 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2784 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2785 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2786 struct btrfs_fs_info *fs_info);
2787 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2788 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2789 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2790 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2791 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2792 u64 start, u64 end);
2793 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2796 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2797 int level, int *slot);
2798 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2799 int btrfs_previous_item(struct btrfs_root *root,
2800 struct btrfs_path *path, u64 min_objectid,
2802 int btrfs_previous_extent_item(struct btrfs_root *root,
2803 struct btrfs_path *path, u64 min_objectid);
2804 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2805 struct btrfs_path *path,
2806 const struct btrfs_key *new_key);
2807 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2808 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2809 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2810 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2811 struct btrfs_key *key, int lowest_level,
2813 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2814 struct btrfs_path *path,
2816 enum btrfs_compare_tree_result {
2817 BTRFS_COMPARE_TREE_NEW,
2818 BTRFS_COMPARE_TREE_DELETED,
2819 BTRFS_COMPARE_TREE_CHANGED,
2820 BTRFS_COMPARE_TREE_SAME,
2822 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2823 struct btrfs_path *right_path,
2824 struct btrfs_key *key,
2825 enum btrfs_compare_tree_result result,
2827 int btrfs_compare_trees(struct btrfs_root *left_root,
2828 struct btrfs_root *right_root,
2829 btrfs_changed_cb_t cb, void *ctx);
2830 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2831 struct btrfs_root *root, struct extent_buffer *buf,
2832 struct extent_buffer *parent, int parent_slot,
2833 struct extent_buffer **cow_ret);
2834 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2835 struct btrfs_root *root,
2836 struct extent_buffer *buf,
2837 struct extent_buffer **cow_ret, u64 new_root_objectid);
2838 int btrfs_block_can_be_shared(struct btrfs_root *root,
2839 struct extent_buffer *buf);
2840 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2842 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2843 struct btrfs_path *path, u32 new_size, int from_end);
2844 int btrfs_split_item(struct btrfs_trans_handle *trans,
2845 struct btrfs_root *root,
2846 struct btrfs_path *path,
2847 const struct btrfs_key *new_key,
2848 unsigned long split_offset);
2849 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2850 struct btrfs_root *root,
2851 struct btrfs_path *path,
2852 const struct btrfs_key *new_key);
2853 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2854 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2855 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2856 const struct btrfs_key *key, struct btrfs_path *p,
2857 int ins_len, int cow);
2858 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2859 struct btrfs_path *p, u64 time_seq);
2860 int btrfs_search_slot_for_read(struct btrfs_root *root,
2861 const struct btrfs_key *key,
2862 struct btrfs_path *p, int find_higher,
2864 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2865 struct btrfs_root *root, struct extent_buffer *parent,
2866 int start_slot, u64 *last_ret,
2867 struct btrfs_key *progress);
2868 void btrfs_release_path(struct btrfs_path *p);
2869 struct btrfs_path *btrfs_alloc_path(void);
2870 void btrfs_free_path(struct btrfs_path *p);
2871 void btrfs_set_path_blocking(struct btrfs_path *p);
2872 void btrfs_clear_path_blocking(struct btrfs_path *p,
2873 struct extent_buffer *held, int held_rw);
2874 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2876 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2877 struct btrfs_path *path, int slot, int nr);
2878 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2879 struct btrfs_root *root,
2880 struct btrfs_path *path)
2882 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2885 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2886 const struct btrfs_key *cpu_key, u32 *data_size,
2887 u32 total_data, u32 total_size, int nr);
2888 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2889 const struct btrfs_key *key, void *data, u32 data_size);
2890 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2891 struct btrfs_root *root,
2892 struct btrfs_path *path,
2893 const struct btrfs_key *cpu_key, u32 *data_size,
2896 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2897 struct btrfs_root *root,
2898 struct btrfs_path *path,
2899 const struct btrfs_key *key,
2902 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2905 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2906 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2907 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2909 static inline int btrfs_next_old_item(struct btrfs_root *root,
2910 struct btrfs_path *p, u64 time_seq)
2913 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2914 return btrfs_next_old_leaf(root, p, time_seq);
2917 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2919 return btrfs_next_old_item(root, p, 0);
2921 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2922 struct extent_buffer *leaf);
2923 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2924 struct btrfs_block_rsv *block_rsv,
2925 int update_ref, int for_reloc);
2926 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2927 struct btrfs_root *root,
2928 struct extent_buffer *node,
2929 struct extent_buffer *parent);
2930 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2933 * Do it this way so we only ever do one test_bit in the normal case.
2935 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2936 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2944 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2945 * anything except sleeping. This function is used to check the status of
2948 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2950 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2953 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2955 kfree(fs_info->balance_ctl);
2956 kfree(fs_info->delayed_root);
2957 kfree(fs_info->extent_root);
2958 kfree(fs_info->tree_root);
2959 kfree(fs_info->chunk_root);
2960 kfree(fs_info->dev_root);
2961 kfree(fs_info->csum_root);
2962 kfree(fs_info->quota_root);
2963 kfree(fs_info->uuid_root);
2964 kfree(fs_info->free_space_root);
2965 kfree(fs_info->super_copy);
2966 kfree(fs_info->super_for_commit);
2967 security_free_mnt_opts(&fs_info->security_opts);
2971 /* tree mod log functions from ctree.c */
2972 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2973 struct seq_list *elem);
2974 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2975 struct seq_list *elem);
2976 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2979 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2980 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2982 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2983 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2985 int btrfs_del_root(struct btrfs_trans_handle *trans,
2986 const struct btrfs_key *key);
2987 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2988 const struct btrfs_key *key,
2989 struct btrfs_root_item *item);
2990 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2991 struct btrfs_root *root,
2992 struct btrfs_key *key,
2993 struct btrfs_root_item *item);
2994 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2995 struct btrfs_path *path, struct btrfs_root_item *root_item,
2996 struct btrfs_key *root_key);
2997 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2998 void btrfs_set_root_node(struct btrfs_root_item *item,
2999 struct extent_buffer *node);
3000 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3001 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3002 struct btrfs_root *root);
3005 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3007 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3009 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3010 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3014 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3015 const char *name, int name_len);
3016 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3017 int name_len, struct btrfs_inode *dir,
3018 struct btrfs_key *location, u8 type, u64 index);
3019 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3020 struct btrfs_root *root,
3021 struct btrfs_path *path, u64 dir,
3022 const char *name, int name_len,
3024 struct btrfs_dir_item *
3025 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root,
3027 struct btrfs_path *path, u64 dir,
3028 u64 objectid, const char *name, int name_len,
3030 struct btrfs_dir_item *
3031 btrfs_search_dir_index_item(struct btrfs_root *root,
3032 struct btrfs_path *path, u64 dirid,
3033 const char *name, int name_len);
3034 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3035 struct btrfs_root *root,
3036 struct btrfs_path *path,
3037 struct btrfs_dir_item *di);
3038 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3039 struct btrfs_root *root,
3040 struct btrfs_path *path, u64 objectid,
3041 const char *name, u16 name_len,
3042 const void *data, u16 data_len);
3043 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3044 struct btrfs_root *root,
3045 struct btrfs_path *path, u64 dir,
3046 const char *name, u16 name_len,
3048 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3049 struct btrfs_path *path,
3054 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3055 struct btrfs_root *root, u64 offset);
3056 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3057 struct btrfs_root *root, u64 offset);
3058 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3061 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3062 struct btrfs_root *root,
3063 const char *name, int name_len,
3064 u64 inode_objectid, u64 ref_objectid, u64 index);
3065 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root,
3067 const char *name, int name_len,
3068 u64 inode_objectid, u64 ref_objectid, u64 *index);
3069 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3070 struct btrfs_root *root,
3071 struct btrfs_path *path, u64 objectid);
3072 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3073 *root, struct btrfs_path *path,
3074 struct btrfs_key *location, int mod);
3076 struct btrfs_inode_extref *
3077 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3078 struct btrfs_root *root,
3079 struct btrfs_path *path,
3080 const char *name, int name_len,
3081 u64 inode_objectid, u64 ref_objectid, int ins_len,
3084 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3086 int name_len, struct btrfs_inode_ref **ref_ret);
3087 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3088 u64 ref_objectid, const char *name,
3090 struct btrfs_inode_extref **extref_ret);
3093 struct btrfs_dio_private;
3094 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3095 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3096 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3097 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3098 u64 logical_offset);
3099 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3100 struct btrfs_root *root,
3101 u64 objectid, u64 pos,
3102 u64 disk_offset, u64 disk_num_bytes,
3103 u64 num_bytes, u64 offset, u64 ram_bytes,
3104 u8 compression, u8 encryption, u16 other_encoding);
3105 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3106 struct btrfs_root *root,
3107 struct btrfs_path *path, u64 objectid,
3108 u64 bytenr, int mod);
3109 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3110 struct btrfs_root *root,
3111 struct btrfs_ordered_sum *sums);
3112 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3113 u64 file_start, int contig);
3114 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3115 struct list_head *list, int search_commit);
3116 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3117 const struct btrfs_path *path,
3118 struct btrfs_file_extent_item *fi,
3119 const bool new_inline,
3120 struct extent_map *em);
3123 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3124 struct page *page, size_t pg_offset, u64 start,
3125 u64 len, int create);
3126 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3127 u64 *orig_start, u64 *orig_block_len,
3130 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3131 struct btrfs_inode *inode);
3132 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3133 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3134 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3135 struct btrfs_root *root,
3136 struct btrfs_inode *dir, struct btrfs_inode *inode,
3137 const char *name, int name_len);
3138 int btrfs_add_link(struct btrfs_trans_handle *trans,
3139 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3140 const char *name, int name_len, int add_backref, u64 index);
3141 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3142 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3144 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3145 struct btrfs_root *root,
3146 struct inode *inode, u64 new_size,
3149 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
3150 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3151 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3152 unsigned int extra_bits,
3153 struct extent_state **cached_state, int dedupe);
3154 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3155 struct btrfs_root *new_root,
3156 struct btrfs_root *parent_root,
3158 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3159 size_t size, struct bio *bio,
3160 unsigned long bio_flags);
3161 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3162 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3163 int btrfs_readpage(struct file *file, struct page *page);
3164 void btrfs_evict_inode(struct inode *inode);
3165 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3166 struct inode *btrfs_alloc_inode(struct super_block *sb);
3167 void btrfs_destroy_inode(struct inode *inode);
3168 int btrfs_drop_inode(struct inode *inode);
3169 int __init btrfs_init_cachep(void);
3170 void __cold btrfs_destroy_cachep(void);
3171 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3172 struct btrfs_root *root, int *was_new);
3173 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3174 struct page *page, size_t pg_offset,
3175 u64 start, u64 end, int create);
3176 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3177 struct btrfs_root *root,
3178 struct inode *inode);
3179 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3180 struct btrfs_root *root, struct inode *inode);
3181 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3182 struct btrfs_inode *inode);
3183 int btrfs_orphan_cleanup(struct btrfs_root *root);
3184 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3185 void btrfs_add_delayed_iput(struct inode *inode);
3186 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3187 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3188 u64 start, u64 num_bytes, u64 min_size,
3189 loff_t actual_len, u64 *alloc_hint);
3190 int btrfs_prealloc_file_range_trans(struct inode *inode,
3191 struct btrfs_trans_handle *trans, int mode,
3192 u64 start, u64 num_bytes, u64 min_size,
3193 loff_t actual_len, u64 *alloc_hint);
3194 extern const struct dentry_operations btrfs_dentry_operations;
3197 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3198 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3199 int btrfs_ioctl_get_supported_features(void __user *arg);
3200 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3201 int btrfs_is_empty_uuid(u8 *uuid);
3202 int btrfs_defrag_file(struct inode *inode, struct file *file,
3203 struct btrfs_ioctl_defrag_range_args *range,
3204 u64 newer_than, unsigned long max_pages);
3205 void btrfs_get_block_group_info(struct list_head *groups_list,
3206 struct btrfs_ioctl_space_info *space);
3207 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3208 struct btrfs_ioctl_balance_args *bargs);
3209 int btrfs_dedupe_file_range(struct file *src_file, loff_t src_loff,
3210 struct file *dst_file, loff_t dst_loff,
3214 int __init btrfs_auto_defrag_init(void);
3215 void __cold btrfs_auto_defrag_exit(void);
3216 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3217 struct btrfs_inode *inode);
3218 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3219 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3220 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3221 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3223 extern const struct file_operations btrfs_file_operations;
3224 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3225 struct btrfs_root *root, struct inode *inode,
3226 struct btrfs_path *path, u64 start, u64 end,
3227 u64 *drop_end, int drop_cache,
3229 u32 extent_item_size,
3231 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3232 struct btrfs_root *root, struct inode *inode, u64 start,
3233 u64 end, int drop_cache);
3234 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3235 struct btrfs_inode *inode, u64 start, u64 end);
3236 int btrfs_release_file(struct inode *inode, struct file *file);
3237 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3238 size_t num_pages, loff_t pos, size_t write_bytes,
3239 struct extent_state **cached);
3240 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3241 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3242 struct file *file_out, loff_t pos_out, u64 len);
3245 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3246 struct btrfs_root *root);
3249 int __init btrfs_init_sysfs(void);
3250 void __cold btrfs_exit_sysfs(void);
3251 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3252 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3255 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3256 unsigned long new_flags);
3257 int btrfs_sync_fs(struct super_block *sb, int wait);
3259 static inline __printf(2, 3) __cold
3260 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3264 #ifdef CONFIG_PRINTK
3267 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3269 #define btrfs_printk(fs_info, fmt, args...) \
3270 btrfs_no_printk(fs_info, fmt, ##args)
3273 #define btrfs_emerg(fs_info, fmt, args...) \
3274 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3275 #define btrfs_alert(fs_info, fmt, args...) \
3276 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3277 #define btrfs_crit(fs_info, fmt, args...) \
3278 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3279 #define btrfs_err(fs_info, fmt, args...) \
3280 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3281 #define btrfs_warn(fs_info, fmt, args...) \
3282 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3283 #define btrfs_notice(fs_info, fmt, args...) \
3284 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3285 #define btrfs_info(fs_info, fmt, args...) \
3286 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3289 * Wrappers that use printk_in_rcu
3291 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3292 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3293 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3294 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3295 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3296 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3297 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3298 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3299 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3300 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3301 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3302 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3303 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3304 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3307 * Wrappers that use a ratelimited printk_in_rcu
3309 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3310 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3311 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3312 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3313 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3314 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3315 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3316 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3317 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3318 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3319 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3320 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3321 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3322 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3325 * Wrappers that use a ratelimited printk
3327 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3328 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3329 #define btrfs_alert_rl(fs_info, fmt, args...) \
3330 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3331 #define btrfs_crit_rl(fs_info, fmt, args...) \
3332 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3333 #define btrfs_err_rl(fs_info, fmt, args...) \
3334 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3335 #define btrfs_warn_rl(fs_info, fmt, args...) \
3336 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3337 #define btrfs_notice_rl(fs_info, fmt, args...) \
3338 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3339 #define btrfs_info_rl(fs_info, fmt, args...) \
3340 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3342 #if defined(CONFIG_DYNAMIC_DEBUG)
3343 #define btrfs_debug(fs_info, fmt, args...) \
3345 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3346 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3347 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3349 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3351 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3352 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3353 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3355 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3357 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3358 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3359 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3362 #define btrfs_debug_rl(fs_info, fmt, args...) \
3364 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3365 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3366 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3369 #elif defined(DEBUG)
3370 #define btrfs_debug(fs_info, fmt, args...) \
3371 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3372 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3373 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3374 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3375 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3376 #define btrfs_debug_rl(fs_info, fmt, args...) \
3377 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3379 #define btrfs_debug(fs_info, fmt, args...) \
3380 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3381 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3382 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3383 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3384 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3385 #define btrfs_debug_rl(fs_info, fmt, args...) \
3386 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3389 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3392 btrfs_printk(fs_info, fmt, ##args); \
3393 rcu_read_unlock(); \
3396 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3399 btrfs_no_printk(fs_info, fmt, ##args); \
3400 rcu_read_unlock(); \
3403 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3405 static DEFINE_RATELIMIT_STATE(_rs, \
3406 DEFAULT_RATELIMIT_INTERVAL, \
3407 DEFAULT_RATELIMIT_BURST); \
3408 if (__ratelimit(&_rs)) \
3409 btrfs_printk(fs_info, fmt, ##args); \
3412 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3415 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3416 rcu_read_unlock(); \
3419 #ifdef CONFIG_BTRFS_ASSERT
3422 static inline void assfail(const char *expr, const char *file, int line)
3424 pr_err("assertion failed: %s, file: %s, line: %d\n",
3429 #define ASSERT(expr) \
3430 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3432 #define ASSERT(expr) ((void)0)
3436 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3439 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3444 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3445 unsigned int line, int errno, const char *fmt, ...);
3447 const char *btrfs_decode_error(int errno);
3450 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3451 const char *function,
3452 unsigned int line, int errno);
3455 * Call btrfs_abort_transaction as early as possible when an error condition is
3456 * detected, that way the exact line number is reported.
3458 #define btrfs_abort_transaction(trans, errno) \
3460 /* Report first abort since mount */ \
3461 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3462 &((trans)->fs_info->fs_state))) { \
3463 if ((errno) != -EIO) { \
3464 WARN(1, KERN_DEBUG \
3465 "BTRFS: Transaction aborted (error %d)\n", \
3468 btrfs_debug((trans)->fs_info, \
3469 "Transaction aborted (error %d)", \
3473 __btrfs_abort_transaction((trans), __func__, \
3474 __LINE__, (errno)); \
3477 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3479 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3480 (errno), fmt, ##args); \
3485 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3486 unsigned int line, int errno, const char *fmt, ...);
3488 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3489 * will panic(). Otherwise we BUG() here.
3491 #define btrfs_panic(fs_info, errno, fmt, args...) \
3493 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3498 /* compatibility and incompatibility defines */
3500 #define btrfs_set_fs_incompat(__fs_info, opt) \
3501 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3503 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3506 struct btrfs_super_block *disk_super;
3509 disk_super = fs_info->super_copy;
3510 features = btrfs_super_incompat_flags(disk_super);
3511 if (!(features & flag)) {
3512 spin_lock(&fs_info->super_lock);
3513 features = btrfs_super_incompat_flags(disk_super);
3514 if (!(features & flag)) {
3516 btrfs_set_super_incompat_flags(disk_super, features);
3517 btrfs_info(fs_info, "setting %llu feature flag",
3520 spin_unlock(&fs_info->super_lock);
3524 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3525 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3527 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3530 struct btrfs_super_block *disk_super;
3533 disk_super = fs_info->super_copy;
3534 features = btrfs_super_incompat_flags(disk_super);
3535 if (features & flag) {
3536 spin_lock(&fs_info->super_lock);
3537 features = btrfs_super_incompat_flags(disk_super);
3538 if (features & flag) {
3540 btrfs_set_super_incompat_flags(disk_super, features);
3541 btrfs_info(fs_info, "clearing %llu feature flag",
3544 spin_unlock(&fs_info->super_lock);
3548 #define btrfs_fs_incompat(fs_info, opt) \
3549 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3551 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3553 struct btrfs_super_block *disk_super;
3554 disk_super = fs_info->super_copy;
3555 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3558 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3559 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3561 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3564 struct btrfs_super_block *disk_super;
3567 disk_super = fs_info->super_copy;
3568 features = btrfs_super_compat_ro_flags(disk_super);
3569 if (!(features & flag)) {
3570 spin_lock(&fs_info->super_lock);
3571 features = btrfs_super_compat_ro_flags(disk_super);
3572 if (!(features & flag)) {
3574 btrfs_set_super_compat_ro_flags(disk_super, features);
3575 btrfs_info(fs_info, "setting %llu ro feature flag",
3578 spin_unlock(&fs_info->super_lock);
3582 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3583 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3585 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3588 struct btrfs_super_block *disk_super;
3591 disk_super = fs_info->super_copy;
3592 features = btrfs_super_compat_ro_flags(disk_super);
3593 if (features & flag) {
3594 spin_lock(&fs_info->super_lock);
3595 features = btrfs_super_compat_ro_flags(disk_super);
3596 if (features & flag) {
3598 btrfs_set_super_compat_ro_flags(disk_super, features);
3599 btrfs_info(fs_info, "clearing %llu ro feature flag",
3602 spin_unlock(&fs_info->super_lock);
3606 #define btrfs_fs_compat_ro(fs_info, opt) \
3607 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3609 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3611 struct btrfs_super_block *disk_super;
3612 disk_super = fs_info->super_copy;
3613 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3617 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3618 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3619 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3620 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3621 struct inode *inode, struct inode *dir);
3623 #define btrfs_get_acl NULL
3624 #define btrfs_set_acl NULL
3625 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3626 struct inode *inode, struct inode *dir)
3633 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3634 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3635 struct btrfs_root *root);
3636 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3637 struct btrfs_root *root);
3638 int btrfs_recover_relocation(struct btrfs_root *root);
3639 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3640 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3641 struct btrfs_root *root, struct extent_buffer *buf,
3642 struct extent_buffer *cow);
3643 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3644 u64 *bytes_to_reserve);
3645 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3646 struct btrfs_pending_snapshot *pending);
3649 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3650 u64 end, struct btrfs_scrub_progress *progress,
3651 int readonly, int is_dev_replace);
3652 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3653 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3654 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3655 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3656 struct btrfs_device *dev);
3657 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3658 struct btrfs_scrub_progress *progress);
3659 static inline void btrfs_init_full_stripe_locks_tree(
3660 struct btrfs_full_stripe_locks_tree *locks_root)
3662 locks_root->root = RB_ROOT;
3663 mutex_init(&locks_root->lock);
3667 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3668 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3669 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3671 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3673 btrfs_bio_counter_sub(fs_info, 1);
3677 struct reada_control {
3678 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3679 struct btrfs_key key_start;
3680 struct btrfs_key key_end; /* exclusive */
3683 wait_queue_head_t wait;
3685 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3686 struct btrfs_key *start, struct btrfs_key *end);
3687 int btrfs_reada_wait(void *handle);
3688 void btrfs_reada_detach(void *handle);
3689 int btree_readahead_hook(struct extent_buffer *eb, int err);
3691 static inline int is_fstree(u64 rootid)
3693 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3694 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3695 !btrfs_qgroup_level(rootid)))
3700 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3702 return signal_pending(current);
3705 /* Sanity test specific functions */
3706 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3707 void btrfs_test_inode_set_ops(struct inode *inode);
3708 void btrfs_test_destroy_inode(struct inode *inode);
3710 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3712 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3715 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3721 static inline void cond_wake_up(struct wait_queue_head *wq)
3724 * This implies a full smp_mb barrier, see comments for
3725 * waitqueue_active why.
3727 if (wq_has_sleeper(wq))
3731 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3734 * Special case for conditional wakeup where the barrier required for
3735 * waitqueue_active is implied by some of the preceding code. Eg. one
3736 * of such atomic operations (atomic_dec_and_return, ...), or a
3737 * unlock/lock sequence, etc.
3739 if (waitqueue_active(wq))