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;
364 atomic_t blocking_readers;
365 wait_queue_head_t read_lock_wq;
367 struct btrfs_scrub_progress scrub_progress;
369 struct percpu_counter bio_counter;
370 wait_queue_head_t replace_wait;
373 /* For raid type sysfs entries */
374 struct raid_kobject {
377 struct list_head list;
380 struct btrfs_space_info {
383 u64 total_bytes; /* total bytes in the space,
384 this doesn't take mirrors into account */
385 u64 bytes_used; /* total bytes used,
386 this doesn't take mirrors into account */
387 u64 bytes_pinned; /* total bytes pinned, will be freed when the
388 transaction finishes */
389 u64 bytes_reserved; /* total bytes the allocator has reserved for
390 current allocations */
391 u64 bytes_may_use; /* number of bytes that may be used for
392 delalloc/allocations */
393 u64 bytes_readonly; /* total bytes that are read only */
395 u64 max_extent_size; /* This will hold the maximum extent size of
396 the space info if we had an ENOSPC in the
399 unsigned int full:1; /* indicates that we cannot allocate any more
400 chunks for this space */
401 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
403 unsigned int flush:1; /* set if we are trying to make space */
405 unsigned int force_alloc; /* set if we need to force a chunk
406 alloc for this space */
408 u64 disk_used; /* total bytes used on disk */
409 u64 disk_total; /* total bytes on disk, takes mirrors into
415 * bytes_pinned is kept in line with what is actually pinned, as in
416 * we've called update_block_group and dropped the bytes_used counter
417 * and increased the bytes_pinned counter. However this means that
418 * bytes_pinned does not reflect the bytes that will be pinned once the
419 * delayed refs are flushed, so this counter is inc'ed every time we
420 * call btrfs_free_extent so it is a realtime count of what will be
421 * freed once the transaction is committed. It will be zeroed every
422 * time the transaction commits.
424 struct percpu_counter total_bytes_pinned;
426 struct list_head list;
427 /* Protected by the spinlock 'lock'. */
428 struct list_head ro_bgs;
429 struct list_head priority_tickets;
430 struct list_head tickets;
432 * tickets_id just indicates the next ticket will be handled, so note
433 * it's not stored per ticket.
437 struct rw_semaphore groups_sem;
438 /* for block groups in our same type */
439 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
440 wait_queue_head_t wait;
443 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
446 #define BTRFS_BLOCK_RSV_GLOBAL 1
447 #define BTRFS_BLOCK_RSV_DELALLOC 2
448 #define BTRFS_BLOCK_RSV_TRANS 3
449 #define BTRFS_BLOCK_RSV_CHUNK 4
450 #define BTRFS_BLOCK_RSV_DELOPS 5
451 #define BTRFS_BLOCK_RSV_EMPTY 6
452 #define BTRFS_BLOCK_RSV_TEMP 7
454 struct btrfs_block_rsv {
457 struct btrfs_space_info *space_info;
461 unsigned short failfast;
464 * Qgroup equivalent for @size @reserved
466 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
467 * about things like csum size nor how many tree blocks it will need to
470 * Qgroup cares more about net change of the extent usage.
472 * So for one newly inserted file extent, in worst case it will cause
473 * leaf split and level increase, nodesize for each file extent is
476 * In short, qgroup_size/reserved is the upper limit of possible needed
477 * qgroup metadata reservation.
480 u64 qgroup_rsv_reserved;
484 * free clusters are used to claim free space in relatively large chunks,
485 * allowing us to do less seeky writes. They are used for all metadata
486 * allocations. In ssd_spread mode they are also used for data allocations.
488 struct btrfs_free_cluster {
490 spinlock_t refill_lock;
493 /* largest extent in this cluster */
496 /* first extent starting offset */
499 /* We did a full search and couldn't create a cluster */
502 struct btrfs_block_group_cache *block_group;
504 * when a cluster is allocated from a block group, we put the
505 * cluster onto a list in the block group so that it can
506 * be freed before the block group is freed.
508 struct list_head block_group_list;
511 enum btrfs_caching_type {
513 BTRFS_CACHE_STARTED = 1,
514 BTRFS_CACHE_FAST = 2,
515 BTRFS_CACHE_FINISHED = 3,
516 BTRFS_CACHE_ERROR = 4,
519 enum btrfs_disk_cache_state {
520 BTRFS_DC_WRITTEN = 0,
526 struct btrfs_caching_control {
527 struct list_head list;
529 wait_queue_head_t wait;
530 struct btrfs_work work;
531 struct btrfs_block_group_cache *block_group;
536 /* Once caching_thread() finds this much free space, it will wake up waiters. */
537 #define CACHING_CTL_WAKE_UP SZ_2M
539 struct btrfs_io_ctl {
543 struct btrfs_fs_info *fs_info;
550 unsigned check_crcs:1;
554 * Tree to record all locked full stripes of a RAID5/6 block group
556 struct btrfs_full_stripe_locks_tree {
561 struct btrfs_block_group_cache {
562 struct btrfs_key key;
563 struct btrfs_block_group_item item;
564 struct btrfs_fs_info *fs_info;
572 u64 cache_generation;
575 * If the free space extent count exceeds this number, convert the block
578 u32 bitmap_high_thresh;
581 * If the free space extent count drops below this number, convert the
582 * block group back to extents.
584 u32 bitmap_low_thresh;
587 * It is just used for the delayed data space allocation because
588 * only the data space allocation and the relative metadata update
589 * can be done cross the transaction.
591 struct rw_semaphore data_rwsem;
593 /* for raid56, this is a full stripe, without parity */
594 unsigned long full_stripe_len;
598 unsigned int has_caching_ctl:1;
599 unsigned int removed:1;
601 int disk_cache_state;
603 /* cache tracking stuff */
605 struct btrfs_caching_control *caching_ctl;
606 u64 last_byte_to_unpin;
608 struct btrfs_space_info *space_info;
610 /* free space cache stuff */
611 struct btrfs_free_space_ctl *free_space_ctl;
613 /* block group cache stuff */
614 struct rb_node cache_node;
616 /* for block groups in the same raid type */
617 struct list_head list;
622 /* List of struct btrfs_free_clusters for this block group.
623 * Today it will only have one thing on it, but that may change
625 struct list_head cluster_list;
627 /* For delayed block group creation or deletion of empty block groups */
628 struct list_head bg_list;
630 /* For read-only block groups */
631 struct list_head ro_list;
635 /* For dirty block groups */
636 struct list_head dirty_list;
637 struct list_head io_list;
639 struct btrfs_io_ctl io_ctl;
642 * Incremented when doing extent allocations and holding a read lock
643 * on the space_info's groups_sem semaphore.
644 * Decremented when an ordered extent that represents an IO against this
645 * block group's range is created (after it's added to its inode's
646 * root's list of ordered extents) or immediately after the allocation
647 * if it's a metadata extent or fallocate extent (for these cases we
648 * don't create ordered extents).
650 atomic_t reservations;
653 * Incremented while holding the spinlock *lock* by a task checking if
654 * it can perform a nocow write (incremented if the value for the *ro*
655 * field is 0). Decremented by such tasks once they create an ordered
656 * extent or before that if some error happens before reaching that step.
657 * This is to prevent races between block group relocation and nocow
658 * writes through direct IO.
660 atomic_t nocow_writers;
662 /* Lock for free space tree operations. */
663 struct mutex free_space_lock;
666 * Does the block group need to be added to the free space tree?
667 * Protected by free_space_lock.
669 int needs_free_space;
671 /* Record locked full stripes for RAID5/6 block group */
672 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
675 /* delayed seq elem */
677 struct list_head list;
681 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
683 #define SEQ_LAST ((u64)-1)
685 enum btrfs_orphan_cleanup_state {
686 ORPHAN_CLEANUP_STARTED = 1,
687 ORPHAN_CLEANUP_DONE = 2,
690 /* used by the raid56 code to lock stripes for read/modify/write */
691 struct btrfs_stripe_hash {
692 struct list_head hash_list;
696 /* used by the raid56 code to lock stripes for read/modify/write */
697 struct btrfs_stripe_hash_table {
698 struct list_head stripe_cache;
699 spinlock_t cache_lock;
701 struct btrfs_stripe_hash table[];
704 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
706 void btrfs_init_async_reclaim_work(struct work_struct *work);
709 struct reloc_control;
711 struct btrfs_fs_devices;
712 struct btrfs_balance_control;
713 struct btrfs_delayed_root;
716 * Block group or device which contains an active swapfile. Used for preventing
717 * unsafe operations while a swapfile is active.
719 * These are sorted on (ptr, inode) (note that a block group or device can
720 * contain more than one swapfile). We compare the pointer values because we
721 * don't actually care what the object is, we just need a quick check whether
722 * the object exists in the rbtree.
724 struct btrfs_swapfile_pin {
729 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
730 * ptr points to a struct btrfs_device.
735 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
737 #define BTRFS_FS_BARRIER 1
738 #define BTRFS_FS_CLOSING_START 2
739 #define BTRFS_FS_CLOSING_DONE 3
740 #define BTRFS_FS_LOG_RECOVERING 4
741 #define BTRFS_FS_OPEN 5
742 #define BTRFS_FS_QUOTA_ENABLED 6
743 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
744 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
745 #define BTRFS_FS_BTREE_ERR 11
746 #define BTRFS_FS_LOG1_ERR 12
747 #define BTRFS_FS_LOG2_ERR 13
748 #define BTRFS_FS_QUOTA_OVERRIDE 14
749 /* Used to record internally whether fs has been frozen */
750 #define BTRFS_FS_FROZEN 15
753 * Indicate that a whole-filesystem exclusive operation is running
754 * (device replace, resize, device add/delete, balance)
756 #define BTRFS_FS_EXCL_OP 16
759 * To info transaction_kthread we need an immediate commit so it doesn't
760 * need to wait for commit_interval
762 #define BTRFS_FS_NEED_ASYNC_COMMIT 17
765 * Indicate that balance has been set up from the ioctl and is in the main
766 * phase. The fs_info::balance_ctl is initialized.
768 #define BTRFS_FS_BALANCE_RUNNING 18
770 struct btrfs_fs_info {
771 u8 fsid[BTRFS_FSID_SIZE];
772 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
774 struct btrfs_root *extent_root;
775 struct btrfs_root *tree_root;
776 struct btrfs_root *chunk_root;
777 struct btrfs_root *dev_root;
778 struct btrfs_root *fs_root;
779 struct btrfs_root *csum_root;
780 struct btrfs_root *quota_root;
781 struct btrfs_root *uuid_root;
782 struct btrfs_root *free_space_root;
784 /* the log root tree is a directory of all the other log roots */
785 struct btrfs_root *log_root_tree;
787 spinlock_t fs_roots_radix_lock;
788 struct radix_tree_root fs_roots_radix;
790 /* block group cache stuff */
791 spinlock_t block_group_cache_lock;
792 u64 first_logical_byte;
793 struct rb_root block_group_cache_tree;
795 /* keep track of unallocated space */
796 atomic64_t free_chunk_space;
798 struct extent_io_tree freed_extents[2];
799 struct extent_io_tree *pinned_extents;
801 /* logical->physical extent mapping */
802 struct btrfs_mapping_tree mapping_tree;
805 * block reservation for extent, checksum, root tree and
806 * delayed dir index item
808 struct btrfs_block_rsv global_block_rsv;
809 /* block reservation for metadata operations */
810 struct btrfs_block_rsv trans_block_rsv;
811 /* block reservation for chunk tree */
812 struct btrfs_block_rsv chunk_block_rsv;
813 /* block reservation for delayed operations */
814 struct btrfs_block_rsv delayed_block_rsv;
816 struct btrfs_block_rsv empty_block_rsv;
819 u64 last_trans_committed;
820 u64 avg_delayed_ref_runtime;
823 * this is updated to the current trans every time a full commit
824 * is required instead of the faster short fsync log commits
826 u64 last_trans_log_full_commit;
827 unsigned long mount_opt;
829 * Track requests for actions that need to be done during transaction
830 * commit (like for some mount options).
832 unsigned long pending_changes;
833 unsigned long compress_type:4;
834 unsigned int compress_level;
837 * It is a suggestive number, the read side is safe even it gets a
838 * wrong number because we will write out the data into a regular
839 * extent. The write side(mount/remount) is under ->s_umount lock,
840 * so it is also safe.
844 struct btrfs_transaction *running_transaction;
845 wait_queue_head_t transaction_throttle;
846 wait_queue_head_t transaction_wait;
847 wait_queue_head_t transaction_blocked_wait;
848 wait_queue_head_t async_submit_wait;
851 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
852 * when they are updated.
854 * Because we do not clear the flags for ever, so we needn't use
855 * the lock on the read side.
857 * We also needn't use the lock when we mount the fs, because
858 * there is no other task which will update the flag.
860 spinlock_t super_lock;
861 struct btrfs_super_block *super_copy;
862 struct btrfs_super_block *super_for_commit;
863 struct super_block *sb;
864 struct inode *btree_inode;
865 struct mutex tree_log_mutex;
866 struct mutex transaction_kthread_mutex;
867 struct mutex cleaner_mutex;
868 struct mutex chunk_mutex;
871 * this is taken to make sure we don't set block groups ro after
872 * the free space cache has been allocated on them
874 struct mutex ro_block_group_mutex;
876 /* this is used during read/modify/write to make sure
877 * no two ios are trying to mod the same stripe at the same
880 struct btrfs_stripe_hash_table *stripe_hash_table;
883 * this protects the ordered operations list only while we are
884 * processing all of the entries on it. This way we make
885 * sure the commit code doesn't find the list temporarily empty
886 * because another function happens to be doing non-waiting preflush
887 * before jumping into the main commit.
889 struct mutex ordered_operations_mutex;
891 struct rw_semaphore commit_root_sem;
893 struct rw_semaphore cleanup_work_sem;
895 struct rw_semaphore subvol_sem;
896 struct srcu_struct subvol_srcu;
898 spinlock_t trans_lock;
900 * the reloc mutex goes with the trans lock, it is taken
901 * during commit to protect us from the relocation code
903 struct mutex reloc_mutex;
905 struct list_head trans_list;
906 struct list_head dead_roots;
907 struct list_head caching_block_groups;
909 spinlock_t delayed_iput_lock;
910 struct list_head delayed_iputs;
911 struct mutex cleaner_delayed_iput_mutex;
913 /* this protects tree_mod_seq_list */
914 spinlock_t tree_mod_seq_lock;
915 atomic64_t tree_mod_seq;
916 struct list_head tree_mod_seq_list;
918 /* this protects tree_mod_log */
919 rwlock_t tree_mod_log_lock;
920 struct rb_root tree_mod_log;
922 atomic_t async_delalloc_pages;
925 * this is used to protect the following list -- ordered_roots.
927 spinlock_t ordered_root_lock;
930 * all fs/file tree roots in which there are data=ordered extents
931 * pending writeback are added into this list.
933 * these can span multiple transactions and basically include
934 * every dirty data page that isn't from nodatacow
936 struct list_head ordered_roots;
938 struct mutex delalloc_root_mutex;
939 spinlock_t delalloc_root_lock;
940 /* all fs/file tree roots that have delalloc inodes. */
941 struct list_head delalloc_roots;
944 * there is a pool of worker threads for checksumming during writes
945 * and a pool for checksumming after reads. This is because readers
946 * can run with FS locks held, and the writers may be waiting for
947 * those locks. We don't want ordering in the pending list to cause
948 * deadlocks, and so the two are serviced separately.
950 * A third pool does submit_bio to avoid deadlocking with the other
953 struct btrfs_workqueue *workers;
954 struct btrfs_workqueue *delalloc_workers;
955 struct btrfs_workqueue *flush_workers;
956 struct btrfs_workqueue *endio_workers;
957 struct btrfs_workqueue *endio_meta_workers;
958 struct btrfs_workqueue *endio_raid56_workers;
959 struct btrfs_workqueue *endio_repair_workers;
960 struct btrfs_workqueue *rmw_workers;
961 struct btrfs_workqueue *endio_meta_write_workers;
962 struct btrfs_workqueue *endio_write_workers;
963 struct btrfs_workqueue *endio_freespace_worker;
964 struct btrfs_workqueue *submit_workers;
965 struct btrfs_workqueue *caching_workers;
966 struct btrfs_workqueue *readahead_workers;
969 * fixup workers take dirty pages that didn't properly go through
970 * the cow mechanism and make them safe to write. It happens
971 * for the sys_munmap function call path
973 struct btrfs_workqueue *fixup_workers;
974 struct btrfs_workqueue *delayed_workers;
976 /* the extent workers do delayed refs on the extent allocation tree */
977 struct btrfs_workqueue *extent_workers;
978 struct task_struct *transaction_kthread;
979 struct task_struct *cleaner_kthread;
980 u32 thread_pool_size;
982 struct kobject *space_info_kobj;
983 struct list_head pending_raid_kobjs;
984 spinlock_t pending_raid_kobjs_lock; /* uncontended */
988 /* used to keep from writing metadata until there is a nice batch */
989 struct percpu_counter dirty_metadata_bytes;
990 struct percpu_counter delalloc_bytes;
991 s32 dirty_metadata_batch;
994 struct list_head dirty_cowonly_roots;
996 struct btrfs_fs_devices *fs_devices;
999 * The space_info list is effectively read only after initial
1000 * setup. It is populated at mount time and cleaned up after
1001 * all block groups are removed. RCU is used to protect it.
1003 struct list_head space_info;
1005 struct btrfs_space_info *data_sinfo;
1007 struct reloc_control *reloc_ctl;
1009 /* data_alloc_cluster is only used in ssd_spread mode */
1010 struct btrfs_free_cluster data_alloc_cluster;
1012 /* all metadata allocations go through this cluster */
1013 struct btrfs_free_cluster meta_alloc_cluster;
1015 /* auto defrag inodes go here */
1016 spinlock_t defrag_inodes_lock;
1017 struct rb_root defrag_inodes;
1018 atomic_t defrag_running;
1020 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1021 seqlock_t profiles_lock;
1023 * these three are in extended format (availability of single
1024 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1025 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1027 u64 avail_data_alloc_bits;
1028 u64 avail_metadata_alloc_bits;
1029 u64 avail_system_alloc_bits;
1031 /* restriper state */
1032 spinlock_t balance_lock;
1033 struct mutex balance_mutex;
1034 atomic_t balance_pause_req;
1035 atomic_t balance_cancel_req;
1036 struct btrfs_balance_control *balance_ctl;
1037 wait_queue_head_t balance_wait_q;
1039 u32 data_chunk_allocations;
1044 /* private scrub information */
1045 struct mutex scrub_lock;
1046 atomic_t scrubs_running;
1047 atomic_t scrub_pause_req;
1048 atomic_t scrubs_paused;
1049 atomic_t scrub_cancel_req;
1050 wait_queue_head_t scrub_pause_wait;
1051 int scrub_workers_refcnt;
1052 struct btrfs_workqueue *scrub_workers;
1053 struct btrfs_workqueue *scrub_wr_completion_workers;
1054 struct btrfs_workqueue *scrub_nocow_workers;
1055 struct btrfs_workqueue *scrub_parity_workers;
1057 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1058 u32 check_integrity_print_mask;
1060 /* is qgroup tracking in a consistent state? */
1063 /* holds configuration and tracking. Protected by qgroup_lock */
1064 struct rb_root qgroup_tree;
1065 struct rb_root qgroup_op_tree;
1066 spinlock_t qgroup_lock;
1067 spinlock_t qgroup_op_lock;
1068 atomic_t qgroup_op_seq;
1071 * used to avoid frequently calling ulist_alloc()/ulist_free()
1072 * when doing qgroup accounting, it must be protected by qgroup_lock.
1074 struct ulist *qgroup_ulist;
1076 /* protect user change for quota operations */
1077 struct mutex qgroup_ioctl_lock;
1079 /* list of dirty qgroups to be written at next commit */
1080 struct list_head dirty_qgroups;
1082 /* used by qgroup for an efficient tree traversal */
1085 /* qgroup rescan items */
1086 struct mutex qgroup_rescan_lock; /* protects the progress item */
1087 struct btrfs_key qgroup_rescan_progress;
1088 struct btrfs_workqueue *qgroup_rescan_workers;
1089 struct completion qgroup_rescan_completion;
1090 struct btrfs_work qgroup_rescan_work;
1091 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1093 /* filesystem state */
1094 unsigned long fs_state;
1096 struct btrfs_delayed_root *delayed_root;
1098 /* readahead tree */
1099 spinlock_t reada_lock;
1100 struct radix_tree_root reada_tree;
1102 /* readahead works cnt */
1103 atomic_t reada_works_cnt;
1105 /* Extent buffer radix tree */
1106 spinlock_t buffer_lock;
1107 struct radix_tree_root buffer_radix;
1109 /* next backup root to be overwritten */
1110 int backup_root_index;
1112 /* device replace state */
1113 struct btrfs_dev_replace dev_replace;
1115 struct semaphore uuid_tree_rescan_sem;
1117 /* Used to reclaim the metadata space in the background. */
1118 struct work_struct async_reclaim_work;
1120 spinlock_t unused_bgs_lock;
1121 struct list_head unused_bgs;
1122 struct mutex unused_bg_unpin_mutex;
1123 struct mutex delete_unused_bgs_mutex;
1125 /* For btrfs to record security options */
1126 struct security_mnt_opts security_opts;
1129 * Chunks that can't be freed yet (under a trim/discard operation)
1130 * and will be latter freed. Protected by fs_info->chunk_mutex.
1132 struct list_head pinned_chunks;
1134 /* Cached block sizes */
1139 /* Block groups and devices containing active swapfiles. */
1140 spinlock_t swapfile_pins_lock;
1141 struct rb_root swapfile_pins;
1143 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1144 spinlock_t ref_verify_lock;
1145 struct rb_root block_tree;
1149 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1151 return sb->s_fs_info;
1154 struct btrfs_subvolume_writers {
1155 struct percpu_counter counter;
1156 wait_queue_head_t wait;
1160 * The state of btrfs root
1163 * btrfs_record_root_in_trans is a multi-step process,
1164 * and it can race with the balancing code. But the
1165 * race is very small, and only the first time the root
1166 * is added to each transaction. So IN_TRANS_SETUP
1167 * is used to tell us when more checks are required
1169 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1170 #define BTRFS_ROOT_REF_COWS 1
1171 #define BTRFS_ROOT_TRACK_DIRTY 2
1172 #define BTRFS_ROOT_IN_RADIX 3
1173 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1174 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1175 #define BTRFS_ROOT_FORCE_COW 6
1176 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1177 #define BTRFS_ROOT_DIRTY 8
1180 * in ram representation of the tree. extent_root is used for all allocations
1181 * and for the extent tree extent_root root.
1184 struct extent_buffer *node;
1186 struct extent_buffer *commit_root;
1187 struct btrfs_root *log_root;
1188 struct btrfs_root *reloc_root;
1190 unsigned long state;
1191 struct btrfs_root_item root_item;
1192 struct btrfs_key root_key;
1193 struct btrfs_fs_info *fs_info;
1194 struct extent_io_tree dirty_log_pages;
1196 struct mutex objectid_mutex;
1198 spinlock_t accounting_lock;
1199 struct btrfs_block_rsv *block_rsv;
1201 /* free ino cache stuff */
1202 struct btrfs_free_space_ctl *free_ino_ctl;
1203 enum btrfs_caching_type ino_cache_state;
1204 spinlock_t ino_cache_lock;
1205 wait_queue_head_t ino_cache_wait;
1206 struct btrfs_free_space_ctl *free_ino_pinned;
1207 u64 ino_cache_progress;
1208 struct inode *ino_cache_inode;
1210 struct mutex log_mutex;
1211 wait_queue_head_t log_writer_wait;
1212 wait_queue_head_t log_commit_wait[2];
1213 struct list_head log_ctxs[2];
1214 atomic_t log_writers;
1215 atomic_t log_commit[2];
1218 /* No matter the commit succeeds or not*/
1219 int log_transid_committed;
1220 /* Just be updated when the commit succeeds. */
1221 int last_log_commit;
1222 pid_t log_start_pid;
1228 u64 highest_objectid;
1230 u64 defrag_trans_start;
1231 struct btrfs_key defrag_progress;
1232 struct btrfs_key defrag_max;
1234 /* the dirty list is only used by non-reference counted roots */
1235 struct list_head dirty_list;
1237 struct list_head root_list;
1239 spinlock_t log_extents_lock[2];
1240 struct list_head logged_list[2];
1242 int orphan_cleanup_state;
1244 spinlock_t inode_lock;
1245 /* red-black tree that keeps track of in-memory inodes */
1246 struct rb_root inode_tree;
1249 * radix tree that keeps track of delayed nodes of every inode,
1250 * protected by inode_lock
1252 struct radix_tree_root delayed_nodes_tree;
1254 * right now this just gets used so that a root has its own devid
1255 * for stat. It may be used for more later
1259 spinlock_t root_item_lock;
1262 struct mutex delalloc_mutex;
1263 spinlock_t delalloc_lock;
1265 * all of the inodes that have delalloc bytes. It is possible for
1266 * this list to be empty even when there is still dirty data=ordered
1267 * extents waiting to finish IO.
1269 struct list_head delalloc_inodes;
1270 struct list_head delalloc_root;
1271 u64 nr_delalloc_inodes;
1273 struct mutex ordered_extent_mutex;
1275 * this is used by the balancing code to wait for all the pending
1278 spinlock_t ordered_extent_lock;
1281 * all of the data=ordered extents pending writeback
1282 * these can span multiple transactions and basically include
1283 * every dirty data page that isn't from nodatacow
1285 struct list_head ordered_extents;
1286 struct list_head ordered_root;
1287 u64 nr_ordered_extents;
1290 * Number of currently running SEND ioctls to prevent
1291 * manipulation with the read-only status via SUBVOL_SETFLAGS
1293 int send_in_progress;
1294 struct btrfs_subvolume_writers *subv_writers;
1295 atomic_t will_be_snapshotted;
1296 atomic_t snapshot_force_cow;
1298 /* For qgroup metadata reserved space */
1299 spinlock_t qgroup_meta_rsv_lock;
1300 u64 qgroup_meta_rsv_pertrans;
1301 u64 qgroup_meta_rsv_prealloc;
1303 /* Number of active swapfiles */
1304 atomic_t nr_swapfiles;
1306 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1311 struct btrfs_file_private {
1315 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1317 return btrfs_sb(inode->i_sb)->sectorsize;
1320 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1323 return info->nodesize - sizeof(struct btrfs_header);
1326 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1328 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1330 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1333 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1335 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1338 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1339 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1340 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1342 return BTRFS_MAX_ITEM_SIZE(info) -
1343 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1346 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1348 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1352 * Flags for mount options.
1354 * Note: don't forget to add new options to btrfs_show_options()
1356 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1357 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1358 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1359 #define BTRFS_MOUNT_SSD (1 << 3)
1360 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1361 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1362 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1363 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1364 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1365 #define BTRFS_MOUNT_NOSSD (1 << 9)
1366 #define BTRFS_MOUNT_DISCARD (1 << 10)
1367 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1368 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1369 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1370 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1371 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1372 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1373 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1374 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1375 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1376 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1377 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1378 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1379 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1380 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1381 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1382 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1383 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1384 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1386 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1387 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1389 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1390 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1391 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1392 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1395 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1397 if (!btrfs_test_opt(fs_info, opt)) \
1398 btrfs_info(fs_info, fmt, ##args); \
1399 btrfs_set_opt(fs_info->mount_opt, opt); \
1402 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1404 if (btrfs_test_opt(fs_info, opt)) \
1405 btrfs_info(fs_info, fmt, ##args); \
1406 btrfs_clear_opt(fs_info->mount_opt, opt); \
1409 #ifdef CONFIG_BTRFS_DEBUG
1411 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1413 struct btrfs_fs_info *fs_info = block_group->fs_info;
1415 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1416 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1417 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1418 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1423 * Requests for changes that need to be done during transaction commit.
1425 * Internal mount options that are used for special handling of the real
1426 * mount options (eg. cannot be set during remount and have to be set during
1427 * transaction commit)
1430 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1431 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1432 #define BTRFS_PENDING_COMMIT (2)
1434 #define btrfs_test_pending(info, opt) \
1435 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1436 #define btrfs_set_pending(info, opt) \
1437 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1438 #define btrfs_clear_pending(info, opt) \
1439 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1442 * Helpers for setting pending mount option changes.
1444 * Expects corresponding macros
1445 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1447 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1449 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1450 btrfs_info((info), fmt, ##args); \
1451 btrfs_set_pending((info), SET_##opt); \
1452 btrfs_clear_pending((info), CLEAR_##opt); \
1456 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1458 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1459 btrfs_info((info), fmt, ##args); \
1460 btrfs_set_pending((info), CLEAR_##opt); \
1461 btrfs_clear_pending((info), SET_##opt); \
1468 #define BTRFS_INODE_NODATASUM (1 << 0)
1469 #define BTRFS_INODE_NODATACOW (1 << 1)
1470 #define BTRFS_INODE_READONLY (1 << 2)
1471 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1472 #define BTRFS_INODE_PREALLOC (1 << 4)
1473 #define BTRFS_INODE_SYNC (1 << 5)
1474 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1475 #define BTRFS_INODE_APPEND (1 << 7)
1476 #define BTRFS_INODE_NODUMP (1 << 8)
1477 #define BTRFS_INODE_NOATIME (1 << 9)
1478 #define BTRFS_INODE_DIRSYNC (1 << 10)
1479 #define BTRFS_INODE_COMPRESS (1 << 11)
1481 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1483 struct btrfs_map_token {
1484 const struct extent_buffer *eb;
1486 unsigned long offset;
1489 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1490 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1492 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1494 token->kaddr = NULL;
1497 /* some macros to generate set/get functions for the struct fields. This
1498 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1501 #define le8_to_cpu(v) (v)
1502 #define cpu_to_le8(v) (v)
1505 #define read_eb_member(eb, ptr, type, member, result) (\
1506 read_extent_buffer(eb, (char *)(result), \
1507 ((unsigned long)(ptr)) + \
1508 offsetof(type, member), \
1509 sizeof(((type *)0)->member)))
1511 #define write_eb_member(eb, ptr, type, member, result) (\
1512 write_extent_buffer(eb, (char *)(result), \
1513 ((unsigned long)(ptr)) + \
1514 offsetof(type, member), \
1515 sizeof(((type *)0)->member)))
1517 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1518 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1519 const void *ptr, unsigned long off, \
1520 struct btrfs_map_token *token); \
1521 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1522 unsigned long off, u##bits val, \
1523 struct btrfs_map_token *token); \
1524 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1526 unsigned long off) \
1528 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1530 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1531 unsigned long off, u##bits val) \
1533 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1536 DECLARE_BTRFS_SETGET_BITS(8)
1537 DECLARE_BTRFS_SETGET_BITS(16)
1538 DECLARE_BTRFS_SETGET_BITS(32)
1539 DECLARE_BTRFS_SETGET_BITS(64)
1541 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1542 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1545 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1546 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1548 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1551 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1552 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1554 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1556 struct btrfs_map_token *token) \
1558 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1559 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1561 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1562 type *s, u##bits val, \
1563 struct btrfs_map_token *token) \
1565 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1566 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1569 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1570 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1572 const type *p = page_address(eb->pages[0]); \
1573 u##bits res = le##bits##_to_cpu(p->member); \
1576 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1579 type *p = page_address(eb->pages[0]); \
1580 p->member = cpu_to_le##bits(val); \
1583 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1584 static inline u##bits btrfs_##name(const type *s) \
1586 return le##bits##_to_cpu(s->member); \
1588 static inline void btrfs_set_##name(type *s, u##bits val) \
1590 s->member = cpu_to_le##bits(val); \
1594 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1595 struct btrfs_dev_item *s)
1597 BUILD_BUG_ON(sizeof(u64) !=
1598 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1599 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1602 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1603 struct btrfs_dev_item *s,
1606 BUILD_BUG_ON(sizeof(u64) !=
1607 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1608 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1609 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1613 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1614 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1615 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1616 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1617 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1619 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1620 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1621 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1622 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1623 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1624 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1626 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1627 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1629 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1631 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1633 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1635 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1637 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1638 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1640 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1642 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1644 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1647 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1649 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1652 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1654 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1657 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1658 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1659 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1660 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1661 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1662 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1663 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1664 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1665 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1666 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1667 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1669 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1671 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1675 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1676 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1678 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1680 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1682 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1684 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1685 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1687 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1689 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1690 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1692 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1695 unsigned long offset = (unsigned long)c;
1696 offset += offsetof(struct btrfs_chunk, stripe);
1697 offset += nr * sizeof(struct btrfs_stripe);
1698 return (struct btrfs_stripe *)offset;
1701 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1703 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1706 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1707 struct btrfs_chunk *c, int nr)
1709 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1712 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1713 struct btrfs_chunk *c, int nr)
1715 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1718 /* struct btrfs_block_group_item */
1719 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1721 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1723 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1724 struct btrfs_block_group_item, chunk_objectid, 64);
1726 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1727 struct btrfs_block_group_item, chunk_objectid, 64);
1728 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1729 struct btrfs_block_group_item, flags, 64);
1730 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1731 struct btrfs_block_group_item, flags, 64);
1733 /* struct btrfs_free_space_info */
1734 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1736 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1738 /* struct btrfs_inode_ref */
1739 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1740 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1742 /* struct btrfs_inode_extref */
1743 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1744 parent_objectid, 64);
1745 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1747 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1749 /* struct btrfs_inode_item */
1750 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1751 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1752 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1753 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1754 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1755 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1756 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1757 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1758 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1759 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1760 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1761 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1762 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1764 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1766 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1768 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1769 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1771 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1773 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1774 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1775 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1776 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1777 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1778 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1779 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1780 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1781 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1782 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1784 /* struct btrfs_dev_extent */
1785 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1787 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1788 chunk_objectid, 64);
1789 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1791 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1793 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1795 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1796 return (unsigned long)dev + ptr;
1799 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1800 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1802 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1804 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1807 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1809 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1810 struct btrfs_tree_block_info *item,
1811 struct btrfs_disk_key *key)
1813 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1816 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1817 struct btrfs_tree_block_info *item,
1818 struct btrfs_disk_key *key)
1820 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1823 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1825 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1827 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1829 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1832 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1835 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1837 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1840 static inline u32 btrfs_extent_inline_ref_size(int type)
1842 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1843 type == BTRFS_SHARED_BLOCK_REF_KEY)
1844 return sizeof(struct btrfs_extent_inline_ref);
1845 if (type == BTRFS_SHARED_DATA_REF_KEY)
1846 return sizeof(struct btrfs_shared_data_ref) +
1847 sizeof(struct btrfs_extent_inline_ref);
1848 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1849 return sizeof(struct btrfs_extent_data_ref) +
1850 offsetof(struct btrfs_extent_inline_ref, offset);
1854 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1855 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1857 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1858 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1860 /* struct btrfs_node */
1861 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1862 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1863 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1865 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1868 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1871 ptr = offsetof(struct btrfs_node, ptrs) +
1872 sizeof(struct btrfs_key_ptr) * nr;
1873 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1876 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1880 ptr = offsetof(struct btrfs_node, ptrs) +
1881 sizeof(struct btrfs_key_ptr) * nr;
1882 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1885 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1888 ptr = offsetof(struct btrfs_node, ptrs) +
1889 sizeof(struct btrfs_key_ptr) * nr;
1890 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1893 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1897 ptr = offsetof(struct btrfs_node, ptrs) +
1898 sizeof(struct btrfs_key_ptr) * nr;
1899 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1902 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1904 return offsetof(struct btrfs_node, ptrs) +
1905 sizeof(struct btrfs_key_ptr) * nr;
1908 void btrfs_node_key(const struct extent_buffer *eb,
1909 struct btrfs_disk_key *disk_key, int nr);
1911 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1912 struct btrfs_disk_key *disk_key, int nr)
1915 ptr = btrfs_node_key_ptr_offset(nr);
1916 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1917 struct btrfs_key_ptr, key, disk_key);
1920 /* struct btrfs_item */
1921 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1922 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1923 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1924 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1926 static inline unsigned long btrfs_item_nr_offset(int nr)
1928 return offsetof(struct btrfs_leaf, items) +
1929 sizeof(struct btrfs_item) * nr;
1932 static inline struct btrfs_item *btrfs_item_nr(int nr)
1934 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1937 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1938 struct btrfs_item *item)
1940 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1943 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1945 return btrfs_item_end(eb, btrfs_item_nr(nr));
1948 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1950 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1953 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1955 return btrfs_item_size(eb, btrfs_item_nr(nr));
1958 static inline void btrfs_item_key(const struct extent_buffer *eb,
1959 struct btrfs_disk_key *disk_key, int nr)
1961 struct btrfs_item *item = btrfs_item_nr(nr);
1962 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1965 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1966 struct btrfs_disk_key *disk_key, int nr)
1968 struct btrfs_item *item = btrfs_item_nr(nr);
1969 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1972 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1975 * struct btrfs_root_ref
1977 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1978 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1979 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1981 /* struct btrfs_dir_item */
1982 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1983 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1984 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1985 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1986 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1987 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1989 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1991 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1994 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1995 const struct btrfs_dir_item *item,
1996 struct btrfs_disk_key *key)
1998 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2001 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2002 struct btrfs_dir_item *item,
2003 const struct btrfs_disk_key *key)
2005 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2008 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2010 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2012 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2015 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2016 const struct btrfs_free_space_header *h,
2017 struct btrfs_disk_key *key)
2019 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2022 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2023 struct btrfs_free_space_header *h,
2024 const struct btrfs_disk_key *key)
2026 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2029 /* struct btrfs_disk_key */
2030 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2032 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2033 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2035 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2036 const struct btrfs_disk_key *disk)
2038 cpu->offset = le64_to_cpu(disk->offset);
2039 cpu->type = disk->type;
2040 cpu->objectid = le64_to_cpu(disk->objectid);
2043 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2044 const struct btrfs_key *cpu)
2046 disk->offset = cpu_to_le64(cpu->offset);
2047 disk->type = cpu->type;
2048 disk->objectid = cpu_to_le64(cpu->objectid);
2051 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2052 struct btrfs_key *key, int nr)
2054 struct btrfs_disk_key disk_key;
2055 btrfs_node_key(eb, &disk_key, nr);
2056 btrfs_disk_key_to_cpu(key, &disk_key);
2059 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2060 struct btrfs_key *key, int nr)
2062 struct btrfs_disk_key disk_key;
2063 btrfs_item_key(eb, &disk_key, nr);
2064 btrfs_disk_key_to_cpu(key, &disk_key);
2067 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2068 const struct btrfs_dir_item *item,
2069 struct btrfs_key *key)
2071 struct btrfs_disk_key disk_key;
2072 btrfs_dir_item_key(eb, item, &disk_key);
2073 btrfs_disk_key_to_cpu(key, &disk_key);
2076 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2081 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2086 /* struct btrfs_header */
2087 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2088 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2090 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2091 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2092 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2093 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2094 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2096 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2097 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2099 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2101 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2103 return (btrfs_header_flags(eb) & flag) == flag;
2106 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2108 u64 flags = btrfs_header_flags(eb);
2109 btrfs_set_header_flags(eb, flags | flag);
2110 return (flags & flag) == flag;
2113 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2115 u64 flags = btrfs_header_flags(eb);
2116 btrfs_set_header_flags(eb, flags & ~flag);
2117 return (flags & flag) == flag;
2120 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2122 u64 flags = btrfs_header_flags(eb);
2123 return flags >> BTRFS_BACKREF_REV_SHIFT;
2126 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2129 u64 flags = btrfs_header_flags(eb);
2130 flags &= ~BTRFS_BACKREF_REV_MASK;
2131 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2132 btrfs_set_header_flags(eb, flags);
2135 static inline unsigned long btrfs_header_fsid(void)
2137 return offsetof(struct btrfs_header, fsid);
2140 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2142 return offsetof(struct btrfs_header, chunk_tree_uuid);
2145 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2147 return btrfs_header_level(eb) == 0;
2150 /* struct btrfs_root_item */
2151 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2153 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2154 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2155 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2157 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2159 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2160 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2161 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2162 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2163 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2164 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2165 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2166 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2168 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2170 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2172 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2174 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2176 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2179 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2181 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2184 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2186 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2189 /* struct btrfs_root_backup */
2190 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2192 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2194 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2195 tree_root_level, 8);
2197 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2199 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2200 chunk_root_gen, 64);
2201 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2202 chunk_root_level, 8);
2204 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2206 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2207 extent_root_gen, 64);
2208 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2209 extent_root_level, 8);
2211 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2213 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2215 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2218 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2220 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2222 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2225 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2227 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2229 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2230 csum_root_level, 8);
2231 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2233 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2235 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2238 /* struct btrfs_balance_item */
2239 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2241 static inline void btrfs_balance_data(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, data, ba);
2248 static inline void btrfs_set_balance_data(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, data, ba);
2255 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2256 const struct btrfs_balance_item *bi,
2257 struct btrfs_disk_balance_args *ba)
2259 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2262 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2263 struct btrfs_balance_item *bi,
2264 const struct btrfs_disk_balance_args *ba)
2266 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2269 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2270 const struct btrfs_balance_item *bi,
2271 struct btrfs_disk_balance_args *ba)
2273 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2276 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2277 struct btrfs_balance_item *bi,
2278 const struct btrfs_disk_balance_args *ba)
2280 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2284 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2285 const struct btrfs_disk_balance_args *disk)
2287 memset(cpu, 0, sizeof(*cpu));
2289 cpu->profiles = le64_to_cpu(disk->profiles);
2290 cpu->usage = le64_to_cpu(disk->usage);
2291 cpu->devid = le64_to_cpu(disk->devid);
2292 cpu->pstart = le64_to_cpu(disk->pstart);
2293 cpu->pend = le64_to_cpu(disk->pend);
2294 cpu->vstart = le64_to_cpu(disk->vstart);
2295 cpu->vend = le64_to_cpu(disk->vend);
2296 cpu->target = le64_to_cpu(disk->target);
2297 cpu->flags = le64_to_cpu(disk->flags);
2298 cpu->limit = le64_to_cpu(disk->limit);
2299 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2300 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2304 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2305 const struct btrfs_balance_args *cpu)
2307 memset(disk, 0, sizeof(*disk));
2309 disk->profiles = cpu_to_le64(cpu->profiles);
2310 disk->usage = cpu_to_le64(cpu->usage);
2311 disk->devid = cpu_to_le64(cpu->devid);
2312 disk->pstart = cpu_to_le64(cpu->pstart);
2313 disk->pend = cpu_to_le64(cpu->pend);
2314 disk->vstart = cpu_to_le64(cpu->vstart);
2315 disk->vend = cpu_to_le64(cpu->vend);
2316 disk->target = cpu_to_le64(cpu->target);
2317 disk->flags = cpu_to_le64(cpu->flags);
2318 disk->limit = cpu_to_le64(cpu->limit);
2319 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2320 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2323 /* struct btrfs_super_block */
2324 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2325 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2326 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2328 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2329 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2330 struct btrfs_super_block, sys_chunk_array_size, 32);
2331 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2332 struct btrfs_super_block, chunk_root_generation, 64);
2333 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2335 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2337 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2338 chunk_root_level, 8);
2339 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2341 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2342 log_root_transid, 64);
2343 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2345 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2347 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2349 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2351 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2353 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2355 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2356 root_dir_objectid, 64);
2357 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2359 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2361 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2362 compat_ro_flags, 64);
2363 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2364 incompat_flags, 64);
2365 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2367 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2368 cache_generation, 64);
2369 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2370 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2371 uuid_tree_generation, 64);
2373 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2375 u16 t = btrfs_super_csum_type(s);
2377 * csum type is validated at mount time
2379 return btrfs_csum_sizes[t];
2384 * The leaf data grows from end-to-front in the node.
2385 * this returns the address of the start of the last item,
2386 * which is the stop of the leaf data stack
2388 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2389 const struct extent_buffer *leaf)
2391 u32 nr = btrfs_header_nritems(leaf);
2394 return BTRFS_LEAF_DATA_SIZE(fs_info);
2395 return btrfs_item_offset_nr(leaf, nr - 1);
2398 /* struct btrfs_file_extent_item */
2399 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2400 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2401 struct btrfs_file_extent_item, disk_bytenr, 64);
2402 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2403 struct btrfs_file_extent_item, offset, 64);
2404 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2405 struct btrfs_file_extent_item, generation, 64);
2406 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2407 struct btrfs_file_extent_item, num_bytes, 64);
2408 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2409 struct btrfs_file_extent_item, disk_num_bytes, 64);
2410 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2411 struct btrfs_file_extent_item, compression, 8);
2413 static inline unsigned long
2414 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2416 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2419 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2421 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2424 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2426 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2428 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2429 disk_num_bytes, 64);
2430 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2432 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2434 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2436 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2438 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2440 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2441 other_encoding, 16);
2444 * this returns the number of bytes used by the item on disk, minus the
2445 * size of any extent headers. If a file is compressed on disk, this is
2446 * the compressed size
2448 static inline u32 btrfs_file_extent_inline_item_len(
2449 const struct extent_buffer *eb,
2450 struct btrfs_item *e)
2452 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2455 /* btrfs_dev_stats_item */
2456 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2457 const struct btrfs_dev_stats_item *ptr,
2462 read_extent_buffer(eb, &val,
2463 offsetof(struct btrfs_dev_stats_item, values) +
2464 ((unsigned long)ptr) + (index * sizeof(u64)),
2469 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2470 struct btrfs_dev_stats_item *ptr,
2473 write_extent_buffer(eb, &val,
2474 offsetof(struct btrfs_dev_stats_item, values) +
2475 ((unsigned long)ptr) + (index * sizeof(u64)),
2479 /* btrfs_qgroup_status_item */
2480 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2482 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2484 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2486 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2489 /* btrfs_qgroup_info_item */
2490 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2492 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2493 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2495 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2496 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2499 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2500 struct btrfs_qgroup_info_item, generation, 64);
2501 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2503 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2504 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2505 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2507 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2508 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2510 /* btrfs_qgroup_limit_item */
2511 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2513 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2515 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2517 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2519 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2522 /* btrfs_dev_replace_item */
2523 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2524 struct btrfs_dev_replace_item, src_devid, 64);
2525 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2526 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2528 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2530 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2532 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2534 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2535 num_write_errors, 64);
2536 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2537 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2539 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2541 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2545 struct btrfs_dev_replace_item, src_devid, 64);
2546 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2547 struct btrfs_dev_replace_item,
2548 cont_reading_from_srcdev_mode, 64);
2549 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2550 struct btrfs_dev_replace_item, replace_state, 64);
2551 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2552 struct btrfs_dev_replace_item, time_started, 64);
2553 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2554 struct btrfs_dev_replace_item, time_stopped, 64);
2555 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2556 struct btrfs_dev_replace_item, num_write_errors, 64);
2557 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2558 struct btrfs_dev_replace_item,
2559 num_uncorrectable_read_errors, 64);
2560 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2561 struct btrfs_dev_replace_item, cursor_left, 64);
2562 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2563 struct btrfs_dev_replace_item, cursor_right, 64);
2565 /* helper function to cast into the data area of the leaf. */
2566 #define btrfs_item_ptr(leaf, slot, type) \
2567 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2568 btrfs_item_offset_nr(leaf, slot)))
2570 #define btrfs_item_ptr_offset(leaf, slot) \
2571 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2572 btrfs_item_offset_nr(leaf, slot)))
2574 static inline u64 btrfs_name_hash(const char *name, int len)
2576 return crc32c((u32)~1, name, len);
2580 * Figure the key offset of an extended inode ref
2582 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2585 return (u64) crc32c(parent_objectid, name, len);
2588 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2590 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2591 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2594 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2596 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2601 enum btrfs_inline_ref_type {
2602 BTRFS_REF_TYPE_INVALID = 0,
2603 BTRFS_REF_TYPE_BLOCK = 1,
2604 BTRFS_REF_TYPE_DATA = 2,
2605 BTRFS_REF_TYPE_ANY = 3,
2608 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2609 struct btrfs_extent_inline_ref *iref,
2610 enum btrfs_inline_ref_type is_data);
2612 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2614 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2617 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2621 * Doing a truncate won't result in new nodes or leaves, just what we need for
2624 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2627 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2630 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans);
2631 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans);
2632 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2634 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2635 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2636 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2637 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2638 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2639 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2640 unsigned long count);
2641 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2642 unsigned long count, u64 transid, int wait);
2643 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2644 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2645 struct btrfs_fs_info *fs_info, u64 bytenr,
2646 u64 offset, int metadata, u64 *refs, u64 *flags);
2647 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2648 u64 bytenr, u64 num, int reserved);
2649 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2650 u64 bytenr, u64 num_bytes);
2651 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2652 struct extent_buffer *eb);
2653 int btrfs_cross_ref_exist(struct btrfs_root *root,
2654 u64 objectid, u64 offset, u64 bytenr);
2655 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2656 struct btrfs_fs_info *info,
2658 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2659 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2660 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2661 struct btrfs_root *root,
2662 u64 parent, u64 root_objectid,
2663 const struct btrfs_disk_key *key,
2664 int level, u64 hint,
2666 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2667 struct btrfs_root *root,
2668 struct extent_buffer *buf,
2669 u64 parent, int last_ref);
2670 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2671 struct btrfs_root *root, u64 owner,
2672 u64 offset, u64 ram_bytes,
2673 struct btrfs_key *ins);
2674 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2675 u64 root_objectid, u64 owner, u64 offset,
2676 struct btrfs_key *ins);
2677 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2678 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2679 struct btrfs_key *ins, int is_data, int delalloc);
2680 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2681 struct extent_buffer *buf, int full_backref);
2682 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2683 struct extent_buffer *buf, int full_backref);
2684 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2685 struct btrfs_fs_info *fs_info,
2686 u64 bytenr, u64 num_bytes, u64 flags,
2687 int level, int is_data);
2688 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2689 struct btrfs_root *root,
2690 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2691 u64 owner, u64 offset);
2693 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2694 u64 start, u64 len, int delalloc);
2695 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2696 u64 start, u64 len);
2697 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2698 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2699 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2700 struct btrfs_root *root,
2701 u64 bytenr, u64 num_bytes, u64 parent,
2702 u64 root_objectid, u64 owner, u64 offset);
2704 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2705 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2706 struct btrfs_fs_info *fs_info);
2707 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2708 struct btrfs_fs_info *fs_info);
2709 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2710 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2711 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2712 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2713 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2714 u64 bytes_used, u64 type, u64 chunk_offset,
2716 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2717 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2718 struct btrfs_fs_info *fs_info,
2719 const u64 chunk_offset);
2720 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2721 u64 group_start, struct extent_map *em);
2722 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2723 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2724 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2725 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2726 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2727 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2728 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2729 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2731 enum btrfs_reserve_flush_enum {
2732 /* If we are in the transaction, we can't flush anything.*/
2733 BTRFS_RESERVE_NO_FLUSH,
2735 * Flushing delalloc may cause deadlock somewhere, in this
2736 * case, use FLUSH LIMIT
2738 BTRFS_RESERVE_FLUSH_LIMIT,
2739 BTRFS_RESERVE_FLUSH_ALL,
2742 enum btrfs_flush_state {
2743 FLUSH_DELAYED_ITEMS_NR = 1,
2744 FLUSH_DELAYED_ITEMS = 2,
2746 FLUSH_DELALLOC_WAIT = 4,
2751 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2752 int btrfs_check_data_free_space(struct inode *inode,
2753 struct extent_changeset **reserved, u64 start, u64 len);
2754 void btrfs_free_reserved_data_space(struct inode *inode,
2755 struct extent_changeset *reserved, u64 start, u64 len);
2756 void btrfs_delalloc_release_space(struct inode *inode,
2757 struct extent_changeset *reserved,
2758 u64 start, u64 len, bool qgroup_free);
2759 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2761 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2762 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2763 struct btrfs_block_rsv *rsv,
2764 int nitems, bool use_global_rsv);
2765 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2766 struct btrfs_block_rsv *rsv);
2767 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2770 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2771 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2773 int btrfs_delalloc_reserve_space(struct inode *inode,
2774 struct extent_changeset **reserved, u64 start, u64 len);
2775 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2776 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2777 unsigned short type);
2778 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2779 struct btrfs_block_rsv *rsv,
2780 unsigned short type);
2781 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2782 struct btrfs_block_rsv *rsv);
2783 int btrfs_block_rsv_add(struct btrfs_root *root,
2784 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2785 enum btrfs_reserve_flush_enum flush);
2786 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2787 int btrfs_block_rsv_refill(struct btrfs_root *root,
2788 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2789 enum btrfs_reserve_flush_enum flush);
2790 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2791 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2793 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2794 struct btrfs_block_rsv *dest, u64 num_bytes,
2796 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2797 struct btrfs_block_rsv *block_rsv,
2799 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2800 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2801 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2802 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2803 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2804 u64 start, u64 end);
2805 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2806 u64 num_bytes, u64 *actual_bytes);
2807 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2808 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2810 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2811 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2812 struct btrfs_fs_info *fs_info);
2813 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2814 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2815 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2816 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2817 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2818 u64 start, u64 end);
2819 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2822 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2823 int level, int *slot);
2824 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2825 int btrfs_previous_item(struct btrfs_root *root,
2826 struct btrfs_path *path, u64 min_objectid,
2828 int btrfs_previous_extent_item(struct btrfs_root *root,
2829 struct btrfs_path *path, u64 min_objectid);
2830 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2831 struct btrfs_path *path,
2832 const struct btrfs_key *new_key);
2833 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2834 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2835 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2836 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2837 struct btrfs_key *key, int lowest_level,
2839 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2840 struct btrfs_path *path,
2842 enum btrfs_compare_tree_result {
2843 BTRFS_COMPARE_TREE_NEW,
2844 BTRFS_COMPARE_TREE_DELETED,
2845 BTRFS_COMPARE_TREE_CHANGED,
2846 BTRFS_COMPARE_TREE_SAME,
2848 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2849 struct btrfs_path *right_path,
2850 struct btrfs_key *key,
2851 enum btrfs_compare_tree_result result,
2853 int btrfs_compare_trees(struct btrfs_root *left_root,
2854 struct btrfs_root *right_root,
2855 btrfs_changed_cb_t cb, void *ctx);
2856 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2857 struct btrfs_root *root, struct extent_buffer *buf,
2858 struct extent_buffer *parent, int parent_slot,
2859 struct extent_buffer **cow_ret);
2860 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2861 struct btrfs_root *root,
2862 struct extent_buffer *buf,
2863 struct extent_buffer **cow_ret, u64 new_root_objectid);
2864 int btrfs_block_can_be_shared(struct btrfs_root *root,
2865 struct extent_buffer *buf);
2866 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2868 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2869 struct btrfs_path *path, u32 new_size, int from_end);
2870 int btrfs_split_item(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root,
2872 struct btrfs_path *path,
2873 const struct btrfs_key *new_key,
2874 unsigned long split_offset);
2875 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2876 struct btrfs_root *root,
2877 struct btrfs_path *path,
2878 const struct btrfs_key *new_key);
2879 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2880 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2881 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2882 const struct btrfs_key *key, struct btrfs_path *p,
2883 int ins_len, int cow);
2884 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2885 struct btrfs_path *p, u64 time_seq);
2886 int btrfs_search_slot_for_read(struct btrfs_root *root,
2887 const struct btrfs_key *key,
2888 struct btrfs_path *p, int find_higher,
2890 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2891 struct btrfs_root *root, struct extent_buffer *parent,
2892 int start_slot, u64 *last_ret,
2893 struct btrfs_key *progress);
2894 void btrfs_release_path(struct btrfs_path *p);
2895 struct btrfs_path *btrfs_alloc_path(void);
2896 void btrfs_free_path(struct btrfs_path *p);
2897 void btrfs_set_path_blocking(struct btrfs_path *p);
2898 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2900 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2901 struct btrfs_path *path, int slot, int nr);
2902 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2903 struct btrfs_root *root,
2904 struct btrfs_path *path)
2906 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2909 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2910 const struct btrfs_key *cpu_key, u32 *data_size,
2911 u32 total_data, u32 total_size, int nr);
2912 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2913 const struct btrfs_key *key, void *data, u32 data_size);
2914 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2915 struct btrfs_root *root,
2916 struct btrfs_path *path,
2917 const struct btrfs_key *cpu_key, u32 *data_size,
2920 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2921 struct btrfs_root *root,
2922 struct btrfs_path *path,
2923 const struct btrfs_key *key,
2926 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2929 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2930 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2931 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2933 static inline int btrfs_next_old_item(struct btrfs_root *root,
2934 struct btrfs_path *p, u64 time_seq)
2937 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2938 return btrfs_next_old_leaf(root, p, time_seq);
2941 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2943 return btrfs_next_old_item(root, p, 0);
2945 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2946 struct extent_buffer *leaf);
2947 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2948 struct btrfs_block_rsv *block_rsv,
2949 int update_ref, int for_reloc);
2950 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2951 struct btrfs_root *root,
2952 struct extent_buffer *node,
2953 struct extent_buffer *parent);
2954 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2957 * Do it this way so we only ever do one test_bit in the normal case.
2959 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2960 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2968 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2969 * anything except sleeping. This function is used to check the status of
2972 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2974 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2977 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2979 kfree(fs_info->balance_ctl);
2980 kfree(fs_info->delayed_root);
2981 kfree(fs_info->extent_root);
2982 kfree(fs_info->tree_root);
2983 kfree(fs_info->chunk_root);
2984 kfree(fs_info->dev_root);
2985 kfree(fs_info->csum_root);
2986 kfree(fs_info->quota_root);
2987 kfree(fs_info->uuid_root);
2988 kfree(fs_info->free_space_root);
2989 kfree(fs_info->super_copy);
2990 kfree(fs_info->super_for_commit);
2991 security_free_mnt_opts(&fs_info->security_opts);
2995 /* tree mod log functions from ctree.c */
2996 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2997 struct seq_list *elem);
2998 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2999 struct seq_list *elem);
3000 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3003 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3004 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3006 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3007 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3009 int btrfs_del_root(struct btrfs_trans_handle *trans,
3010 const struct btrfs_key *key);
3011 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3012 const struct btrfs_key *key,
3013 struct btrfs_root_item *item);
3014 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3015 struct btrfs_root *root,
3016 struct btrfs_key *key,
3017 struct btrfs_root_item *item);
3018 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3019 struct btrfs_path *path, struct btrfs_root_item *root_item,
3020 struct btrfs_key *root_key);
3021 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3022 void btrfs_set_root_node(struct btrfs_root_item *item,
3023 struct extent_buffer *node);
3024 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3025 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root);
3029 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3031 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3033 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3034 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3038 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3039 const char *name, int name_len);
3040 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3041 int name_len, struct btrfs_inode *dir,
3042 struct btrfs_key *location, u8 type, u64 index);
3043 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3044 struct btrfs_root *root,
3045 struct btrfs_path *path, u64 dir,
3046 const char *name, int name_len,
3048 struct btrfs_dir_item *
3049 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3050 struct btrfs_root *root,
3051 struct btrfs_path *path, u64 dir,
3052 u64 objectid, const char *name, int name_len,
3054 struct btrfs_dir_item *
3055 btrfs_search_dir_index_item(struct btrfs_root *root,
3056 struct btrfs_path *path, u64 dirid,
3057 const char *name, int name_len);
3058 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3059 struct btrfs_root *root,
3060 struct btrfs_path *path,
3061 struct btrfs_dir_item *di);
3062 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3063 struct btrfs_root *root,
3064 struct btrfs_path *path, u64 objectid,
3065 const char *name, u16 name_len,
3066 const void *data, u16 data_len);
3067 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3068 struct btrfs_root *root,
3069 struct btrfs_path *path, u64 dir,
3070 const char *name, u16 name_len,
3072 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3073 struct btrfs_path *path,
3078 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3079 struct btrfs_root *root, u64 offset);
3080 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3081 struct btrfs_root *root, u64 offset);
3082 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3085 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3086 struct btrfs_root *root,
3087 const char *name, int name_len,
3088 u64 inode_objectid, u64 ref_objectid, u64 index);
3089 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3090 struct btrfs_root *root,
3091 const char *name, int name_len,
3092 u64 inode_objectid, u64 ref_objectid, u64 *index);
3093 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3094 struct btrfs_root *root,
3095 struct btrfs_path *path, u64 objectid);
3096 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3097 *root, struct btrfs_path *path,
3098 struct btrfs_key *location, int mod);
3100 struct btrfs_inode_extref *
3101 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3102 struct btrfs_root *root,
3103 struct btrfs_path *path,
3104 const char *name, int name_len,
3105 u64 inode_objectid, u64 ref_objectid, int ins_len,
3108 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3110 int name_len, struct btrfs_inode_ref **ref_ret);
3111 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3112 u64 ref_objectid, const char *name,
3114 struct btrfs_inode_extref **extref_ret);
3117 struct btrfs_dio_private;
3118 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3119 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3120 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3121 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3122 u64 logical_offset);
3123 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3124 struct btrfs_root *root,
3125 u64 objectid, u64 pos,
3126 u64 disk_offset, u64 disk_num_bytes,
3127 u64 num_bytes, u64 offset, u64 ram_bytes,
3128 u8 compression, u8 encryption, u16 other_encoding);
3129 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3130 struct btrfs_root *root,
3131 struct btrfs_path *path, u64 objectid,
3132 u64 bytenr, int mod);
3133 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3134 struct btrfs_root *root,
3135 struct btrfs_ordered_sum *sums);
3136 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3137 u64 file_start, int contig);
3138 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3139 struct list_head *list, int search_commit);
3140 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3141 const struct btrfs_path *path,
3142 struct btrfs_file_extent_item *fi,
3143 const bool new_inline,
3144 struct extent_map *em);
3147 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3148 struct page *page, size_t pg_offset, u64 start,
3149 u64 len, int create);
3150 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3151 u64 *orig_start, u64 *orig_block_len,
3154 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3155 struct btrfs_inode *inode);
3156 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3157 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3158 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root,
3160 struct btrfs_inode *dir, struct btrfs_inode *inode,
3161 const char *name, int name_len);
3162 int btrfs_add_link(struct btrfs_trans_handle *trans,
3163 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3164 const char *name, int name_len, int add_backref, u64 index);
3165 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3166 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3168 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3169 struct btrfs_root *root,
3170 struct inode *inode, u64 new_size,
3173 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3174 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3175 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3176 unsigned int extra_bits,
3177 struct extent_state **cached_state, int dedupe);
3178 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3179 struct btrfs_root *new_root,
3180 struct btrfs_root *parent_root,
3182 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3184 void btrfs_clear_delalloc_extent(struct inode *inode,
3185 struct extent_state *state, unsigned *bits);
3186 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3187 struct extent_state *other);
3188 void btrfs_split_delalloc_extent(struct inode *inode,
3189 struct extent_state *orig, u64 split);
3190 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3191 size_t size, struct bio *bio,
3192 unsigned long bio_flags);
3193 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3194 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3195 int btrfs_readpage(struct file *file, struct page *page);
3196 void btrfs_evict_inode(struct inode *inode);
3197 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3198 struct inode *btrfs_alloc_inode(struct super_block *sb);
3199 void btrfs_destroy_inode(struct inode *inode);
3200 int btrfs_drop_inode(struct inode *inode);
3201 int __init btrfs_init_cachep(void);
3202 void __cold btrfs_destroy_cachep(void);
3203 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3204 struct btrfs_root *root, int *new,
3205 struct btrfs_path *path);
3206 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3207 struct btrfs_root *root, int *was_new);
3208 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3209 struct page *page, size_t pg_offset,
3210 u64 start, u64 end, int create);
3211 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3212 struct btrfs_root *root,
3213 struct inode *inode);
3214 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3215 struct btrfs_root *root, struct inode *inode);
3216 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3217 struct btrfs_inode *inode);
3218 int btrfs_orphan_cleanup(struct btrfs_root *root);
3219 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3220 void btrfs_add_delayed_iput(struct inode *inode);
3221 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3222 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3223 u64 start, u64 num_bytes, u64 min_size,
3224 loff_t actual_len, u64 *alloc_hint);
3225 int btrfs_prealloc_file_range_trans(struct inode *inode,
3226 struct btrfs_trans_handle *trans, int mode,
3227 u64 start, u64 num_bytes, u64 min_size,
3228 loff_t actual_len, u64 *alloc_hint);
3229 int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
3230 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3231 struct writeback_control *wbc);
3232 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3233 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3234 u64 end, int uptodate);
3235 extern const struct dentry_operations btrfs_dentry_operations;
3238 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3239 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3240 int btrfs_ioctl_get_supported_features(void __user *arg);
3241 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3242 int btrfs_is_empty_uuid(u8 *uuid);
3243 int btrfs_defrag_file(struct inode *inode, struct file *file,
3244 struct btrfs_ioctl_defrag_range_args *range,
3245 u64 newer_than, unsigned long max_pages);
3246 void btrfs_get_block_group_info(struct list_head *groups_list,
3247 struct btrfs_ioctl_space_info *space);
3248 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3249 struct btrfs_ioctl_balance_args *bargs);
3252 int __init btrfs_auto_defrag_init(void);
3253 void __cold btrfs_auto_defrag_exit(void);
3254 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3255 struct btrfs_inode *inode);
3256 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3257 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3258 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3259 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3261 extern const struct file_operations btrfs_file_operations;
3262 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3263 struct btrfs_root *root, struct inode *inode,
3264 struct btrfs_path *path, u64 start, u64 end,
3265 u64 *drop_end, int drop_cache,
3267 u32 extent_item_size,
3269 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3270 struct btrfs_root *root, struct inode *inode, u64 start,
3271 u64 end, int drop_cache);
3272 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3273 struct btrfs_inode *inode, u64 start, u64 end);
3274 int btrfs_release_file(struct inode *inode, struct file *file);
3275 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3276 size_t num_pages, loff_t pos, size_t write_bytes,
3277 struct extent_state **cached);
3278 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3279 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
3280 struct file *file_out, loff_t pos_out,
3281 loff_t len, unsigned int remap_flags);
3284 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3285 struct btrfs_root *root);
3288 int __init btrfs_init_sysfs(void);
3289 void __cold btrfs_exit_sysfs(void);
3290 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3291 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3294 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3295 unsigned long new_flags);
3296 int btrfs_sync_fs(struct super_block *sb, int wait);
3298 static inline __printf(2, 3) __cold
3299 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3303 #ifdef CONFIG_PRINTK
3306 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3308 #define btrfs_printk(fs_info, fmt, args...) \
3309 btrfs_no_printk(fs_info, fmt, ##args)
3312 #define btrfs_emerg(fs_info, fmt, args...) \
3313 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3314 #define btrfs_alert(fs_info, fmt, args...) \
3315 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3316 #define btrfs_crit(fs_info, fmt, args...) \
3317 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3318 #define btrfs_err(fs_info, fmt, args...) \
3319 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3320 #define btrfs_warn(fs_info, fmt, args...) \
3321 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3322 #define btrfs_notice(fs_info, fmt, args...) \
3323 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3324 #define btrfs_info(fs_info, fmt, args...) \
3325 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3328 * Wrappers that use printk_in_rcu
3330 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3331 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3332 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3333 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3334 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3335 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3336 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3337 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3338 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3339 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3340 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3341 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3342 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3343 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3346 * Wrappers that use a ratelimited printk_in_rcu
3348 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3349 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3350 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3351 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3352 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3353 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3354 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3355 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3356 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3357 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3358 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3359 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3360 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3361 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3364 * Wrappers that use a ratelimited printk
3366 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3367 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3368 #define btrfs_alert_rl(fs_info, fmt, args...) \
3369 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3370 #define btrfs_crit_rl(fs_info, fmt, args...) \
3371 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3372 #define btrfs_err_rl(fs_info, fmt, args...) \
3373 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3374 #define btrfs_warn_rl(fs_info, fmt, args...) \
3375 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3376 #define btrfs_notice_rl(fs_info, fmt, args...) \
3377 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3378 #define btrfs_info_rl(fs_info, fmt, args...) \
3379 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3381 #if defined(CONFIG_DYNAMIC_DEBUG)
3382 #define btrfs_debug(fs_info, fmt, args...) \
3384 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3385 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3386 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3388 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3390 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3391 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3392 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3394 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3396 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3397 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3398 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3401 #define btrfs_debug_rl(fs_info, fmt, args...) \
3403 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3404 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3405 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3408 #elif defined(DEBUG)
3409 #define btrfs_debug(fs_info, fmt, args...) \
3410 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3411 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3412 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3413 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3414 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3415 #define btrfs_debug_rl(fs_info, fmt, args...) \
3416 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3418 #define btrfs_debug(fs_info, fmt, args...) \
3419 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3420 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3421 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3422 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3423 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3424 #define btrfs_debug_rl(fs_info, fmt, args...) \
3425 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3428 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3431 btrfs_printk(fs_info, fmt, ##args); \
3432 rcu_read_unlock(); \
3435 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3438 btrfs_no_printk(fs_info, fmt, ##args); \
3439 rcu_read_unlock(); \
3442 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3444 static DEFINE_RATELIMIT_STATE(_rs, \
3445 DEFAULT_RATELIMIT_INTERVAL, \
3446 DEFAULT_RATELIMIT_BURST); \
3447 if (__ratelimit(&_rs)) \
3448 btrfs_printk(fs_info, fmt, ##args); \
3451 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3454 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3455 rcu_read_unlock(); \
3458 #ifdef CONFIG_BTRFS_ASSERT
3461 static inline void assfail(const char *expr, const char *file, int line)
3463 pr_err("assertion failed: %s, file: %s, line: %d\n",
3468 #define ASSERT(expr) \
3469 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3471 #define ASSERT(expr) ((void)0)
3475 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3478 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3483 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3484 unsigned int line, int errno, const char *fmt, ...);
3486 const char *btrfs_decode_error(int errno);
3489 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3490 const char *function,
3491 unsigned int line, int errno);
3494 * Call btrfs_abort_transaction as early as possible when an error condition is
3495 * detected, that way the exact line number is reported.
3497 #define btrfs_abort_transaction(trans, errno) \
3499 /* Report first abort since mount */ \
3500 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3501 &((trans)->fs_info->fs_state))) { \
3502 if ((errno) != -EIO) { \
3503 WARN(1, KERN_DEBUG \
3504 "BTRFS: Transaction aborted (error %d)\n", \
3507 btrfs_debug((trans)->fs_info, \
3508 "Transaction aborted (error %d)", \
3512 __btrfs_abort_transaction((trans), __func__, \
3513 __LINE__, (errno)); \
3516 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3518 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3519 (errno), fmt, ##args); \
3524 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3525 unsigned int line, int errno, const char *fmt, ...);
3527 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3528 * will panic(). Otherwise we BUG() here.
3530 #define btrfs_panic(fs_info, errno, fmt, args...) \
3532 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3537 /* compatibility and incompatibility defines */
3539 #define btrfs_set_fs_incompat(__fs_info, opt) \
3540 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3542 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3545 struct btrfs_super_block *disk_super;
3548 disk_super = fs_info->super_copy;
3549 features = btrfs_super_incompat_flags(disk_super);
3550 if (!(features & flag)) {
3551 spin_lock(&fs_info->super_lock);
3552 features = btrfs_super_incompat_flags(disk_super);
3553 if (!(features & flag)) {
3555 btrfs_set_super_incompat_flags(disk_super, features);
3556 btrfs_info(fs_info, "setting %llu feature flag",
3559 spin_unlock(&fs_info->super_lock);
3563 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3564 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3566 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3569 struct btrfs_super_block *disk_super;
3572 disk_super = fs_info->super_copy;
3573 features = btrfs_super_incompat_flags(disk_super);
3574 if (features & flag) {
3575 spin_lock(&fs_info->super_lock);
3576 features = btrfs_super_incompat_flags(disk_super);
3577 if (features & flag) {
3579 btrfs_set_super_incompat_flags(disk_super, features);
3580 btrfs_info(fs_info, "clearing %llu feature flag",
3583 spin_unlock(&fs_info->super_lock);
3587 #define btrfs_fs_incompat(fs_info, opt) \
3588 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3590 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3592 struct btrfs_super_block *disk_super;
3593 disk_super = fs_info->super_copy;
3594 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3597 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3598 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3600 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3603 struct btrfs_super_block *disk_super;
3606 disk_super = fs_info->super_copy;
3607 features = btrfs_super_compat_ro_flags(disk_super);
3608 if (!(features & flag)) {
3609 spin_lock(&fs_info->super_lock);
3610 features = btrfs_super_compat_ro_flags(disk_super);
3611 if (!(features & flag)) {
3613 btrfs_set_super_compat_ro_flags(disk_super, features);
3614 btrfs_info(fs_info, "setting %llu ro feature flag",
3617 spin_unlock(&fs_info->super_lock);
3621 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3622 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3624 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3627 struct btrfs_super_block *disk_super;
3630 disk_super = fs_info->super_copy;
3631 features = btrfs_super_compat_ro_flags(disk_super);
3632 if (features & flag) {
3633 spin_lock(&fs_info->super_lock);
3634 features = btrfs_super_compat_ro_flags(disk_super);
3635 if (features & flag) {
3637 btrfs_set_super_compat_ro_flags(disk_super, features);
3638 btrfs_info(fs_info, "clearing %llu ro feature flag",
3641 spin_unlock(&fs_info->super_lock);
3645 #define btrfs_fs_compat_ro(fs_info, opt) \
3646 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3648 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3650 struct btrfs_super_block *disk_super;
3651 disk_super = fs_info->super_copy;
3652 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3656 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3657 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3658 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3659 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3660 struct inode *inode, struct inode *dir);
3662 #define btrfs_get_acl NULL
3663 #define btrfs_set_acl NULL
3664 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3665 struct inode *inode, struct inode *dir)
3672 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3673 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3674 struct btrfs_root *root);
3675 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3676 struct btrfs_root *root);
3677 int btrfs_recover_relocation(struct btrfs_root *root);
3678 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3679 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3680 struct btrfs_root *root, struct extent_buffer *buf,
3681 struct extent_buffer *cow);
3682 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3683 u64 *bytes_to_reserve);
3684 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3685 struct btrfs_pending_snapshot *pending);
3688 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3689 u64 end, struct btrfs_scrub_progress *progress,
3690 int readonly, int is_dev_replace);
3691 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3692 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3693 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3694 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3695 struct btrfs_device *dev);
3696 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3697 struct btrfs_scrub_progress *progress);
3698 static inline void btrfs_init_full_stripe_locks_tree(
3699 struct btrfs_full_stripe_locks_tree *locks_root)
3701 locks_root->root = RB_ROOT;
3702 mutex_init(&locks_root->lock);
3706 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3707 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3708 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3710 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3712 btrfs_bio_counter_sub(fs_info, 1);
3716 struct reada_control {
3717 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3718 struct btrfs_key key_start;
3719 struct btrfs_key key_end; /* exclusive */
3722 wait_queue_head_t wait;
3724 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3725 struct btrfs_key *start, struct btrfs_key *end);
3726 int btrfs_reada_wait(void *handle);
3727 void btrfs_reada_detach(void *handle);
3728 int btree_readahead_hook(struct extent_buffer *eb, int err);
3730 static inline int is_fstree(u64 rootid)
3732 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3733 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3734 !btrfs_qgroup_level(rootid)))
3739 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3741 return signal_pending(current);
3744 /* Sanity test specific functions */
3745 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3746 void btrfs_test_inode_set_ops(struct inode *inode);
3747 void btrfs_test_destroy_inode(struct inode *inode);
3749 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3751 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3754 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3760 static inline void cond_wake_up(struct wait_queue_head *wq)
3763 * This implies a full smp_mb barrier, see comments for
3764 * waitqueue_active why.
3766 if (wq_has_sleeper(wq))
3770 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3773 * Special case for conditional wakeup where the barrier required for
3774 * waitqueue_active is implied by some of the preceding code. Eg. one
3775 * of such atomic operations (atomic_dec_and_return, ...), or a
3776 * unlock/lock sequence, etc.
3778 if (waitqueue_active(wq))