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);
112 * Runtime (in-memory) states of filesystem
115 /* Global indicator of serious filesystem errors */
116 BTRFS_FS_STATE_ERROR,
118 * Filesystem is being remounted, allow to skip some operations, like
121 BTRFS_FS_STATE_REMOUNTING,
122 /* Track if a transaction abort has been reported on this filesystem */
123 BTRFS_FS_STATE_TRANS_ABORTED,
125 * Bio operations should be blocked on this filesystem because a source
126 * or target device is being destroyed as part of a device replace
128 BTRFS_FS_STATE_DEV_REPLACING,
129 /* The btrfs_fs_info created for self-tests */
130 BTRFS_FS_STATE_DUMMY_FS_INFO,
133 #define BTRFS_BACKREF_REV_MAX 256
134 #define BTRFS_BACKREF_REV_SHIFT 56
135 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
136 BTRFS_BACKREF_REV_SHIFT)
138 #define BTRFS_OLD_BACKREF_REV 0
139 #define BTRFS_MIXED_BACKREF_REV 1
142 * every tree block (leaf or node) starts with this header.
144 struct btrfs_header {
145 /* these first four must match the super block */
146 u8 csum[BTRFS_CSUM_SIZE];
147 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
148 __le64 bytenr; /* which block this node is supposed to live in */
151 /* allowed to be different from the super from here on down */
152 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
157 } __attribute__ ((__packed__));
160 * this is a very generous portion of the super block, giving us
161 * room to translate 14 chunks with 3 stripes each.
163 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
166 * just in case we somehow lose the roots and are not able to mount,
167 * we store an array of the roots from previous transactions
170 #define BTRFS_NUM_BACKUP_ROOTS 4
171 struct btrfs_root_backup {
173 __le64 tree_root_gen;
176 __le64 chunk_root_gen;
179 __le64 extent_root_gen;
188 __le64 csum_root_gen;
198 u8 extent_root_level;
202 /* future and to align */
204 } __attribute__ ((__packed__));
207 * the super block basically lists the main trees of the FS
208 * it currently lacks any block count etc etc
210 struct btrfs_super_block {
211 /* the first 4 fields must match struct btrfs_header */
212 u8 csum[BTRFS_CSUM_SIZE];
213 /* FS specific UUID, visible to user */
214 u8 fsid[BTRFS_FSID_SIZE];
215 __le64 bytenr; /* this block number */
218 /* allowed to be different from the btrfs_header from here own down */
225 /* this will help find the new super based on the log root */
226 __le64 log_root_transid;
229 __le64 root_dir_objectid;
233 __le32 __unused_leafsize;
235 __le32 sys_chunk_array_size;
236 __le64 chunk_root_generation;
238 __le64 compat_ro_flags;
239 __le64 incompat_flags;
244 struct btrfs_dev_item dev_item;
246 char label[BTRFS_LABEL_SIZE];
248 __le64 cache_generation;
249 __le64 uuid_tree_generation;
251 /* the UUID written into btree blocks */
252 u8 metadata_uuid[BTRFS_FSID_SIZE];
254 /* future expansion */
256 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
257 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
258 } __attribute__ ((__packed__));
261 * Compat flags that we support. If any incompat flags are set other than the
262 * ones specified below then we will fail to mount
264 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
265 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
266 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
268 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
269 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
270 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
272 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
273 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
275 #define BTRFS_FEATURE_INCOMPAT_SUPP \
276 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
277 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
278 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
279 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
280 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
281 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
282 BTRFS_FEATURE_INCOMPAT_RAID56 | \
283 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
284 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
285 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
286 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
288 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
289 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
290 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
293 * A leaf is full of items. offset and size tell us where to find
294 * the item in the leaf (relative to the start of the data area)
297 struct btrfs_disk_key key;
300 } __attribute__ ((__packed__));
303 * leaves have an item area and a data area:
304 * [item0, item1....itemN] [free space] [dataN...data1, data0]
306 * The data is separate from the items to get the keys closer together
310 struct btrfs_header header;
311 struct btrfs_item items[];
312 } __attribute__ ((__packed__));
315 * all non-leaf blocks are nodes, they hold only keys and pointers to
318 struct btrfs_key_ptr {
319 struct btrfs_disk_key key;
322 } __attribute__ ((__packed__));
325 struct btrfs_header header;
326 struct btrfs_key_ptr ptrs[];
327 } __attribute__ ((__packed__));
330 * btrfs_paths remember the path taken from the root down to the leaf.
331 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
332 * to any other levels that are present.
334 * The slots array records the index of the item or block pointer
335 * used while walking the tree.
337 enum { READA_NONE, READA_BACK, READA_FORWARD };
339 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
340 int slots[BTRFS_MAX_LEVEL];
341 /* if there is real range locking, this locks field will change */
342 u8 locks[BTRFS_MAX_LEVEL];
344 /* keep some upper locks as we walk down */
348 * set by btrfs_split_item, tells search_slot to keep all locks
349 * and to force calls to keep space in the nodes
351 unsigned int search_for_split:1;
352 unsigned int keep_locks:1;
353 unsigned int skip_locking:1;
354 unsigned int leave_spinning:1;
355 unsigned int search_commit_root:1;
356 unsigned int need_commit_sem:1;
357 unsigned int skip_release_on_error:1;
359 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
360 sizeof(struct btrfs_item))
361 struct btrfs_dev_replace {
362 u64 replace_state; /* see #define above */
363 time64_t time_started; /* seconds since 1-Jan-1970 */
364 time64_t time_stopped; /* seconds since 1-Jan-1970 */
365 atomic64_t num_write_errors;
366 atomic64_t num_uncorrectable_read_errors;
369 u64 committed_cursor_left;
370 u64 cursor_left_last_write_of_item;
373 u64 cont_reading_from_srcdev_mode; /* see #define above */
376 int item_needs_writeback;
377 struct btrfs_device *srcdev;
378 struct btrfs_device *tgtdev;
380 struct mutex lock_finishing_cancel_unmount;
381 struct rw_semaphore rwsem;
383 struct btrfs_scrub_progress scrub_progress;
385 struct percpu_counter bio_counter;
386 wait_queue_head_t replace_wait;
389 /* For raid type sysfs entries */
390 struct raid_kobject {
393 struct list_head list;
396 struct btrfs_space_info {
399 u64 total_bytes; /* total bytes in the space,
400 this doesn't take mirrors into account */
401 u64 bytes_used; /* total bytes used,
402 this doesn't take mirrors into account */
403 u64 bytes_pinned; /* total bytes pinned, will be freed when the
404 transaction finishes */
405 u64 bytes_reserved; /* total bytes the allocator has reserved for
406 current allocations */
407 u64 bytes_may_use; /* number of bytes that may be used for
408 delalloc/allocations */
409 u64 bytes_readonly; /* total bytes that are read only */
411 u64 max_extent_size; /* This will hold the maximum extent size of
412 the space info if we had an ENOSPC in the
415 unsigned int full:1; /* indicates that we cannot allocate any more
416 chunks for this space */
417 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
419 unsigned int flush:1; /* set if we are trying to make space */
421 unsigned int force_alloc; /* set if we need to force a chunk
422 alloc for this space */
424 u64 disk_used; /* total bytes used on disk */
425 u64 disk_total; /* total bytes on disk, takes mirrors into
431 * bytes_pinned is kept in line with what is actually pinned, as in
432 * we've called update_block_group and dropped the bytes_used counter
433 * and increased the bytes_pinned counter. However this means that
434 * bytes_pinned does not reflect the bytes that will be pinned once the
435 * delayed refs are flushed, so this counter is inc'ed every time we
436 * call btrfs_free_extent so it is a realtime count of what will be
437 * freed once the transaction is committed. It will be zeroed every
438 * time the transaction commits.
440 struct percpu_counter total_bytes_pinned;
442 struct list_head list;
443 /* Protected by the spinlock 'lock'. */
444 struct list_head ro_bgs;
445 struct list_head priority_tickets;
446 struct list_head tickets;
448 * tickets_id just indicates the next ticket will be handled, so note
449 * it's not stored per ticket.
453 struct rw_semaphore groups_sem;
454 /* for block groups in our same type */
455 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
456 wait_queue_head_t wait;
459 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
463 * Types of block reserves
466 BTRFS_BLOCK_RSV_GLOBAL,
467 BTRFS_BLOCK_RSV_DELALLOC,
468 BTRFS_BLOCK_RSV_TRANS,
469 BTRFS_BLOCK_RSV_CHUNK,
470 BTRFS_BLOCK_RSV_DELOPS,
471 BTRFS_BLOCK_RSV_DELREFS,
472 BTRFS_BLOCK_RSV_EMPTY,
473 BTRFS_BLOCK_RSV_TEMP,
476 struct btrfs_block_rsv {
479 struct btrfs_space_info *space_info;
483 unsigned short failfast;
486 * Qgroup equivalent for @size @reserved
488 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
489 * about things like csum size nor how many tree blocks it will need to
492 * Qgroup cares more about net change of the extent usage.
494 * So for one newly inserted file extent, in worst case it will cause
495 * leaf split and level increase, nodesize for each file extent is
498 * In short, qgroup_size/reserved is the upper limit of possible needed
499 * qgroup metadata reservation.
502 u64 qgroup_rsv_reserved;
506 * free clusters are used to claim free space in relatively large chunks,
507 * allowing us to do less seeky writes. They are used for all metadata
508 * allocations. In ssd_spread mode they are also used for data allocations.
510 struct btrfs_free_cluster {
512 spinlock_t refill_lock;
515 /* largest extent in this cluster */
518 /* first extent starting offset */
521 /* We did a full search and couldn't create a cluster */
524 struct btrfs_block_group_cache *block_group;
526 * when a cluster is allocated from a block group, we put the
527 * cluster onto a list in the block group so that it can
528 * be freed before the block group is freed.
530 struct list_head block_group_list;
533 enum btrfs_caching_type {
537 BTRFS_CACHE_FINISHED,
541 enum btrfs_disk_cache_state {
548 struct btrfs_caching_control {
549 struct list_head list;
551 wait_queue_head_t wait;
552 struct btrfs_work work;
553 struct btrfs_block_group_cache *block_group;
558 /* Once caching_thread() finds this much free space, it will wake up waiters. */
559 #define CACHING_CTL_WAKE_UP SZ_2M
561 struct btrfs_io_ctl {
565 struct btrfs_fs_info *fs_info;
572 unsigned check_crcs:1;
576 * Tree to record all locked full stripes of a RAID5/6 block group
578 struct btrfs_full_stripe_locks_tree {
583 struct btrfs_block_group_cache {
584 struct btrfs_key key;
585 struct btrfs_block_group_item item;
586 struct btrfs_fs_info *fs_info;
594 u64 cache_generation;
597 * If the free space extent count exceeds this number, convert the block
600 u32 bitmap_high_thresh;
603 * If the free space extent count drops below this number, convert the
604 * block group back to extents.
606 u32 bitmap_low_thresh;
609 * It is just used for the delayed data space allocation because
610 * only the data space allocation and the relative metadata update
611 * can be done cross the transaction.
613 struct rw_semaphore data_rwsem;
615 /* for raid56, this is a full stripe, without parity */
616 unsigned long full_stripe_len;
620 unsigned int has_caching_ctl:1;
621 unsigned int removed:1;
623 int disk_cache_state;
625 /* cache tracking stuff */
627 struct btrfs_caching_control *caching_ctl;
628 u64 last_byte_to_unpin;
630 struct btrfs_space_info *space_info;
632 /* free space cache stuff */
633 struct btrfs_free_space_ctl *free_space_ctl;
635 /* block group cache stuff */
636 struct rb_node cache_node;
638 /* for block groups in the same raid type */
639 struct list_head list;
644 /* List of struct btrfs_free_clusters for this block group.
645 * Today it will only have one thing on it, but that may change
647 struct list_head cluster_list;
649 /* For delayed block group creation or deletion of empty block groups */
650 struct list_head bg_list;
652 /* For read-only block groups */
653 struct list_head ro_list;
657 /* For dirty block groups */
658 struct list_head dirty_list;
659 struct list_head io_list;
661 struct btrfs_io_ctl io_ctl;
664 * Incremented when doing extent allocations and holding a read lock
665 * on the space_info's groups_sem semaphore.
666 * Decremented when an ordered extent that represents an IO against this
667 * block group's range is created (after it's added to its inode's
668 * root's list of ordered extents) or immediately after the allocation
669 * if it's a metadata extent or fallocate extent (for these cases we
670 * don't create ordered extents).
672 atomic_t reservations;
675 * Incremented while holding the spinlock *lock* by a task checking if
676 * it can perform a nocow write (incremented if the value for the *ro*
677 * field is 0). Decremented by such tasks once they create an ordered
678 * extent or before that if some error happens before reaching that step.
679 * This is to prevent races between block group relocation and nocow
680 * writes through direct IO.
682 atomic_t nocow_writers;
684 /* Lock for free space tree operations. */
685 struct mutex free_space_lock;
688 * Does the block group need to be added to the free space tree?
689 * Protected by free_space_lock.
691 int needs_free_space;
693 /* Record locked full stripes for RAID5/6 block group */
694 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
697 /* delayed seq elem */
699 struct list_head list;
703 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
705 #define SEQ_LAST ((u64)-1)
707 enum btrfs_orphan_cleanup_state {
708 ORPHAN_CLEANUP_STARTED = 1,
709 ORPHAN_CLEANUP_DONE = 2,
712 /* used by the raid56 code to lock stripes for read/modify/write */
713 struct btrfs_stripe_hash {
714 struct list_head hash_list;
718 /* used by the raid56 code to lock stripes for read/modify/write */
719 struct btrfs_stripe_hash_table {
720 struct list_head stripe_cache;
721 spinlock_t cache_lock;
723 struct btrfs_stripe_hash table[];
726 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
728 void btrfs_init_async_reclaim_work(struct work_struct *work);
731 struct reloc_control;
733 struct btrfs_fs_devices;
734 struct btrfs_balance_control;
735 struct btrfs_delayed_root;
738 * Block group or device which contains an active swapfile. Used for preventing
739 * unsafe operations while a swapfile is active.
741 * These are sorted on (ptr, inode) (note that a block group or device can
742 * contain more than one swapfile). We compare the pointer values because we
743 * don't actually care what the object is, we just need a quick check whether
744 * the object exists in the rbtree.
746 struct btrfs_swapfile_pin {
751 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
752 * ptr points to a struct btrfs_device.
757 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
761 BTRFS_FS_CLOSING_START,
762 BTRFS_FS_CLOSING_DONE,
763 BTRFS_FS_LOG_RECOVERING,
765 BTRFS_FS_QUOTA_ENABLED,
766 BTRFS_FS_UPDATE_UUID_TREE_GEN,
767 BTRFS_FS_CREATING_FREE_SPACE_TREE,
771 BTRFS_FS_QUOTA_OVERRIDE,
772 /* Used to record internally whether fs has been frozen */
775 * Indicate that a whole-filesystem exclusive operation is running
776 * (device replace, resize, device add/delete, balance)
780 * To info transaction_kthread we need an immediate commit so it
781 * doesn't need to wait for commit_interval
783 BTRFS_FS_NEED_ASYNC_COMMIT,
785 * Indicate that balance has been set up from the ioctl and is in the
786 * main phase. The fs_info::balance_ctl is initialized.
788 BTRFS_FS_BALANCE_RUNNING,
791 struct btrfs_fs_info {
792 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
794 struct btrfs_root *extent_root;
795 struct btrfs_root *tree_root;
796 struct btrfs_root *chunk_root;
797 struct btrfs_root *dev_root;
798 struct btrfs_root *fs_root;
799 struct btrfs_root *csum_root;
800 struct btrfs_root *quota_root;
801 struct btrfs_root *uuid_root;
802 struct btrfs_root *free_space_root;
804 /* the log root tree is a directory of all the other log roots */
805 struct btrfs_root *log_root_tree;
807 spinlock_t fs_roots_radix_lock;
808 struct radix_tree_root fs_roots_radix;
810 /* block group cache stuff */
811 spinlock_t block_group_cache_lock;
812 u64 first_logical_byte;
813 struct rb_root block_group_cache_tree;
815 /* keep track of unallocated space */
816 atomic64_t free_chunk_space;
818 struct extent_io_tree freed_extents[2];
819 struct extent_io_tree *pinned_extents;
821 /* logical->physical extent mapping */
822 struct btrfs_mapping_tree mapping_tree;
825 * block reservation for extent, checksum, root tree and
826 * delayed dir index item
828 struct btrfs_block_rsv global_block_rsv;
829 /* block reservation for metadata operations */
830 struct btrfs_block_rsv trans_block_rsv;
831 /* block reservation for chunk tree */
832 struct btrfs_block_rsv chunk_block_rsv;
833 /* block reservation for delayed operations */
834 struct btrfs_block_rsv delayed_block_rsv;
835 /* block reservation for delayed refs */
836 struct btrfs_block_rsv delayed_refs_rsv;
838 struct btrfs_block_rsv empty_block_rsv;
841 u64 last_trans_committed;
842 u64 avg_delayed_ref_runtime;
845 * this is updated to the current trans every time a full commit
846 * is required instead of the faster short fsync log commits
848 u64 last_trans_log_full_commit;
849 unsigned long mount_opt;
851 * Track requests for actions that need to be done during transaction
852 * commit (like for some mount options).
854 unsigned long pending_changes;
855 unsigned long compress_type:4;
856 unsigned int compress_level;
859 * It is a suggestive number, the read side is safe even it gets a
860 * wrong number because we will write out the data into a regular
861 * extent. The write side(mount/remount) is under ->s_umount lock,
862 * so it is also safe.
866 struct btrfs_transaction *running_transaction;
867 wait_queue_head_t transaction_throttle;
868 wait_queue_head_t transaction_wait;
869 wait_queue_head_t transaction_blocked_wait;
870 wait_queue_head_t async_submit_wait;
873 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
874 * when they are updated.
876 * Because we do not clear the flags for ever, so we needn't use
877 * the lock on the read side.
879 * We also needn't use the lock when we mount the fs, because
880 * there is no other task which will update the flag.
882 spinlock_t super_lock;
883 struct btrfs_super_block *super_copy;
884 struct btrfs_super_block *super_for_commit;
885 struct super_block *sb;
886 struct inode *btree_inode;
887 struct mutex tree_log_mutex;
888 struct mutex transaction_kthread_mutex;
889 struct mutex cleaner_mutex;
890 struct mutex chunk_mutex;
893 * this is taken to make sure we don't set block groups ro after
894 * the free space cache has been allocated on them
896 struct mutex ro_block_group_mutex;
898 /* this is used during read/modify/write to make sure
899 * no two ios are trying to mod the same stripe at the same
902 struct btrfs_stripe_hash_table *stripe_hash_table;
905 * this protects the ordered operations list only while we are
906 * processing all of the entries on it. This way we make
907 * sure the commit code doesn't find the list temporarily empty
908 * because another function happens to be doing non-waiting preflush
909 * before jumping into the main commit.
911 struct mutex ordered_operations_mutex;
913 struct rw_semaphore commit_root_sem;
915 struct rw_semaphore cleanup_work_sem;
917 struct rw_semaphore subvol_sem;
918 struct srcu_struct subvol_srcu;
920 spinlock_t trans_lock;
922 * the reloc mutex goes with the trans lock, it is taken
923 * during commit to protect us from the relocation code
925 struct mutex reloc_mutex;
927 struct list_head trans_list;
928 struct list_head dead_roots;
929 struct list_head caching_block_groups;
931 spinlock_t delayed_iput_lock;
932 struct list_head delayed_iputs;
933 struct mutex cleaner_delayed_iput_mutex;
935 /* this protects tree_mod_seq_list */
936 spinlock_t tree_mod_seq_lock;
937 atomic64_t tree_mod_seq;
938 struct list_head tree_mod_seq_list;
940 /* this protects tree_mod_log */
941 rwlock_t tree_mod_log_lock;
942 struct rb_root tree_mod_log;
944 atomic_t async_delalloc_pages;
947 * this is used to protect the following list -- ordered_roots.
949 spinlock_t ordered_root_lock;
952 * all fs/file tree roots in which there are data=ordered extents
953 * pending writeback are added into this list.
955 * these can span multiple transactions and basically include
956 * every dirty data page that isn't from nodatacow
958 struct list_head ordered_roots;
960 struct mutex delalloc_root_mutex;
961 spinlock_t delalloc_root_lock;
962 /* all fs/file tree roots that have delalloc inodes. */
963 struct list_head delalloc_roots;
966 * there is a pool of worker threads for checksumming during writes
967 * and a pool for checksumming after reads. This is because readers
968 * can run with FS locks held, and the writers may be waiting for
969 * those locks. We don't want ordering in the pending list to cause
970 * deadlocks, and so the two are serviced separately.
972 * A third pool does submit_bio to avoid deadlocking with the other
975 struct btrfs_workqueue *workers;
976 struct btrfs_workqueue *delalloc_workers;
977 struct btrfs_workqueue *flush_workers;
978 struct btrfs_workqueue *endio_workers;
979 struct btrfs_workqueue *endio_meta_workers;
980 struct btrfs_workqueue *endio_raid56_workers;
981 struct btrfs_workqueue *endio_repair_workers;
982 struct btrfs_workqueue *rmw_workers;
983 struct btrfs_workqueue *endio_meta_write_workers;
984 struct btrfs_workqueue *endio_write_workers;
985 struct btrfs_workqueue *endio_freespace_worker;
986 struct btrfs_workqueue *submit_workers;
987 struct btrfs_workqueue *caching_workers;
988 struct btrfs_workqueue *readahead_workers;
991 * fixup workers take dirty pages that didn't properly go through
992 * the cow mechanism and make them safe to write. It happens
993 * for the sys_munmap function call path
995 struct btrfs_workqueue *fixup_workers;
996 struct btrfs_workqueue *delayed_workers;
998 /* the extent workers do delayed refs on the extent allocation tree */
999 struct btrfs_workqueue *extent_workers;
1000 struct task_struct *transaction_kthread;
1001 struct task_struct *cleaner_kthread;
1002 u32 thread_pool_size;
1004 struct kobject *space_info_kobj;
1005 struct list_head pending_raid_kobjs;
1006 spinlock_t pending_raid_kobjs_lock; /* uncontended */
1010 /* used to keep from writing metadata until there is a nice batch */
1011 struct percpu_counter dirty_metadata_bytes;
1012 struct percpu_counter delalloc_bytes;
1013 s32 dirty_metadata_batch;
1016 struct list_head dirty_cowonly_roots;
1018 struct btrfs_fs_devices *fs_devices;
1021 * The space_info list is effectively read only after initial
1022 * setup. It is populated at mount time and cleaned up after
1023 * all block groups are removed. RCU is used to protect it.
1025 struct list_head space_info;
1027 struct btrfs_space_info *data_sinfo;
1029 struct reloc_control *reloc_ctl;
1031 /* data_alloc_cluster is only used in ssd_spread mode */
1032 struct btrfs_free_cluster data_alloc_cluster;
1034 /* all metadata allocations go through this cluster */
1035 struct btrfs_free_cluster meta_alloc_cluster;
1037 /* auto defrag inodes go here */
1038 spinlock_t defrag_inodes_lock;
1039 struct rb_root defrag_inodes;
1040 atomic_t defrag_running;
1042 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1043 seqlock_t profiles_lock;
1045 * these three are in extended format (availability of single
1046 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1047 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1049 u64 avail_data_alloc_bits;
1050 u64 avail_metadata_alloc_bits;
1051 u64 avail_system_alloc_bits;
1053 /* restriper state */
1054 spinlock_t balance_lock;
1055 struct mutex balance_mutex;
1056 atomic_t balance_pause_req;
1057 atomic_t balance_cancel_req;
1058 struct btrfs_balance_control *balance_ctl;
1059 wait_queue_head_t balance_wait_q;
1061 u32 data_chunk_allocations;
1066 /* private scrub information */
1067 struct mutex scrub_lock;
1068 atomic_t scrubs_running;
1069 atomic_t scrub_pause_req;
1070 atomic_t scrubs_paused;
1071 atomic_t scrub_cancel_req;
1072 wait_queue_head_t scrub_pause_wait;
1073 int scrub_workers_refcnt;
1074 struct btrfs_workqueue *scrub_workers;
1075 struct btrfs_workqueue *scrub_wr_completion_workers;
1076 struct btrfs_workqueue *scrub_nocow_workers;
1077 struct btrfs_workqueue *scrub_parity_workers;
1079 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1080 u32 check_integrity_print_mask;
1082 /* is qgroup tracking in a consistent state? */
1085 /* holds configuration and tracking. Protected by qgroup_lock */
1086 struct rb_root qgroup_tree;
1087 struct rb_root qgroup_op_tree;
1088 spinlock_t qgroup_lock;
1089 spinlock_t qgroup_op_lock;
1090 atomic_t qgroup_op_seq;
1093 * used to avoid frequently calling ulist_alloc()/ulist_free()
1094 * when doing qgroup accounting, it must be protected by qgroup_lock.
1096 struct ulist *qgroup_ulist;
1098 /* protect user change for quota operations */
1099 struct mutex qgroup_ioctl_lock;
1101 /* list of dirty qgroups to be written at next commit */
1102 struct list_head dirty_qgroups;
1104 /* used by qgroup for an efficient tree traversal */
1107 /* qgroup rescan items */
1108 struct mutex qgroup_rescan_lock; /* protects the progress item */
1109 struct btrfs_key qgroup_rescan_progress;
1110 struct btrfs_workqueue *qgroup_rescan_workers;
1111 struct completion qgroup_rescan_completion;
1112 struct btrfs_work qgroup_rescan_work;
1113 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1115 /* filesystem state */
1116 unsigned long fs_state;
1118 struct btrfs_delayed_root *delayed_root;
1120 /* readahead tree */
1121 spinlock_t reada_lock;
1122 struct radix_tree_root reada_tree;
1124 /* readahead works cnt */
1125 atomic_t reada_works_cnt;
1127 /* Extent buffer radix tree */
1128 spinlock_t buffer_lock;
1129 struct radix_tree_root buffer_radix;
1131 /* next backup root to be overwritten */
1132 int backup_root_index;
1134 /* device replace state */
1135 struct btrfs_dev_replace dev_replace;
1137 struct semaphore uuid_tree_rescan_sem;
1139 /* Used to reclaim the metadata space in the background. */
1140 struct work_struct async_reclaim_work;
1142 spinlock_t unused_bgs_lock;
1143 struct list_head unused_bgs;
1144 struct mutex unused_bg_unpin_mutex;
1145 struct mutex delete_unused_bgs_mutex;
1148 * Chunks that can't be freed yet (under a trim/discard operation)
1149 * and will be latter freed. Protected by fs_info->chunk_mutex.
1151 struct list_head pinned_chunks;
1153 /* Cached block sizes */
1158 /* Block groups and devices containing active swapfiles. */
1159 spinlock_t swapfile_pins_lock;
1160 struct rb_root swapfile_pins;
1162 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1163 spinlock_t ref_verify_lock;
1164 struct rb_root block_tree;
1168 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1170 return sb->s_fs_info;
1173 struct btrfs_subvolume_writers {
1174 struct percpu_counter counter;
1175 wait_queue_head_t wait;
1179 * The state of btrfs root
1183 * btrfs_record_root_in_trans is a multi-step process, and it can race
1184 * with the balancing code. But the race is very small, and only the
1185 * first time the root is added to each transaction. So IN_TRANS_SETUP
1186 * is used to tell us when more checks are required
1188 BTRFS_ROOT_IN_TRANS_SETUP,
1189 BTRFS_ROOT_REF_COWS,
1190 BTRFS_ROOT_TRACK_DIRTY,
1191 BTRFS_ROOT_IN_RADIX,
1192 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1193 BTRFS_ROOT_DEFRAG_RUNNING,
1194 BTRFS_ROOT_FORCE_COW,
1195 BTRFS_ROOT_MULTI_LOG_TASKS,
1197 BTRFS_ROOT_DELETING,
1201 * in ram representation of the tree. extent_root is used for all allocations
1202 * and for the extent tree extent_root root.
1205 struct extent_buffer *node;
1207 struct extent_buffer *commit_root;
1208 struct btrfs_root *log_root;
1209 struct btrfs_root *reloc_root;
1211 unsigned long state;
1212 struct btrfs_root_item root_item;
1213 struct btrfs_key root_key;
1214 struct btrfs_fs_info *fs_info;
1215 struct extent_io_tree dirty_log_pages;
1217 struct mutex objectid_mutex;
1219 spinlock_t accounting_lock;
1220 struct btrfs_block_rsv *block_rsv;
1222 /* free ino cache stuff */
1223 struct btrfs_free_space_ctl *free_ino_ctl;
1224 enum btrfs_caching_type ino_cache_state;
1225 spinlock_t ino_cache_lock;
1226 wait_queue_head_t ino_cache_wait;
1227 struct btrfs_free_space_ctl *free_ino_pinned;
1228 u64 ino_cache_progress;
1229 struct inode *ino_cache_inode;
1231 struct mutex log_mutex;
1232 wait_queue_head_t log_writer_wait;
1233 wait_queue_head_t log_commit_wait[2];
1234 struct list_head log_ctxs[2];
1235 atomic_t log_writers;
1236 atomic_t log_commit[2];
1239 /* No matter the commit succeeds or not*/
1240 int log_transid_committed;
1241 /* Just be updated when the commit succeeds. */
1242 int last_log_commit;
1243 pid_t log_start_pid;
1249 u64 highest_objectid;
1251 u64 defrag_trans_start;
1252 struct btrfs_key defrag_progress;
1253 struct btrfs_key defrag_max;
1255 /* the dirty list is only used by non-reference counted roots */
1256 struct list_head dirty_list;
1258 struct list_head root_list;
1260 spinlock_t log_extents_lock[2];
1261 struct list_head logged_list[2];
1263 int orphan_cleanup_state;
1265 spinlock_t inode_lock;
1266 /* red-black tree that keeps track of in-memory inodes */
1267 struct rb_root inode_tree;
1270 * radix tree that keeps track of delayed nodes of every inode,
1271 * protected by inode_lock
1273 struct radix_tree_root delayed_nodes_tree;
1275 * right now this just gets used so that a root has its own devid
1276 * for stat. It may be used for more later
1280 spinlock_t root_item_lock;
1283 struct mutex delalloc_mutex;
1284 spinlock_t delalloc_lock;
1286 * all of the inodes that have delalloc bytes. It is possible for
1287 * this list to be empty even when there is still dirty data=ordered
1288 * extents waiting to finish IO.
1290 struct list_head delalloc_inodes;
1291 struct list_head delalloc_root;
1292 u64 nr_delalloc_inodes;
1294 struct mutex ordered_extent_mutex;
1296 * this is used by the balancing code to wait for all the pending
1299 spinlock_t ordered_extent_lock;
1302 * all of the data=ordered extents pending writeback
1303 * these can span multiple transactions and basically include
1304 * every dirty data page that isn't from nodatacow
1306 struct list_head ordered_extents;
1307 struct list_head ordered_root;
1308 u64 nr_ordered_extents;
1311 * Number of currently running SEND ioctls to prevent
1312 * manipulation with the read-only status via SUBVOL_SETFLAGS
1314 int send_in_progress;
1315 struct btrfs_subvolume_writers *subv_writers;
1316 atomic_t will_be_snapshotted;
1317 atomic_t snapshot_force_cow;
1319 /* For qgroup metadata reserved space */
1320 spinlock_t qgroup_meta_rsv_lock;
1321 u64 qgroup_meta_rsv_pertrans;
1322 u64 qgroup_meta_rsv_prealloc;
1324 /* Number of active swapfiles */
1325 atomic_t nr_swapfiles;
1327 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1332 struct btrfs_file_private {
1336 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1338 return btrfs_sb(inode->i_sb)->sectorsize;
1341 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1344 return info->nodesize - sizeof(struct btrfs_header);
1347 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1349 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1351 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1354 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1356 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1359 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1360 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1361 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1363 return BTRFS_MAX_ITEM_SIZE(info) -
1364 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1367 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1369 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1373 * Flags for mount options.
1375 * Note: don't forget to add new options to btrfs_show_options()
1377 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1378 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1379 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1380 #define BTRFS_MOUNT_SSD (1 << 3)
1381 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1382 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1383 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1384 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1385 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1386 #define BTRFS_MOUNT_NOSSD (1 << 9)
1387 #define BTRFS_MOUNT_DISCARD (1 << 10)
1388 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1389 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1390 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1391 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1392 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1393 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1394 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1395 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1396 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1397 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1398 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1399 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1400 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1401 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1402 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1403 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1404 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1405 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1407 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1408 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1410 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1411 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1412 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1413 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1416 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1418 if (!btrfs_test_opt(fs_info, opt)) \
1419 btrfs_info(fs_info, fmt, ##args); \
1420 btrfs_set_opt(fs_info->mount_opt, opt); \
1423 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1425 if (btrfs_test_opt(fs_info, opt)) \
1426 btrfs_info(fs_info, fmt, ##args); \
1427 btrfs_clear_opt(fs_info->mount_opt, opt); \
1430 #ifdef CONFIG_BTRFS_DEBUG
1432 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1434 struct btrfs_fs_info *fs_info = block_group->fs_info;
1436 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1437 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1438 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1439 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1444 * Requests for changes that need to be done during transaction commit.
1446 * Internal mount options that are used for special handling of the real
1447 * mount options (eg. cannot be set during remount and have to be set during
1448 * transaction commit)
1451 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1452 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1453 #define BTRFS_PENDING_COMMIT (2)
1455 #define btrfs_test_pending(info, opt) \
1456 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1457 #define btrfs_set_pending(info, opt) \
1458 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1459 #define btrfs_clear_pending(info, opt) \
1460 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1463 * Helpers for setting pending mount option changes.
1465 * Expects corresponding macros
1466 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1468 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1470 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1471 btrfs_info((info), fmt, ##args); \
1472 btrfs_set_pending((info), SET_##opt); \
1473 btrfs_clear_pending((info), CLEAR_##opt); \
1477 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1479 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1480 btrfs_info((info), fmt, ##args); \
1481 btrfs_set_pending((info), CLEAR_##opt); \
1482 btrfs_clear_pending((info), SET_##opt); \
1489 #define BTRFS_INODE_NODATASUM (1 << 0)
1490 #define BTRFS_INODE_NODATACOW (1 << 1)
1491 #define BTRFS_INODE_READONLY (1 << 2)
1492 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1493 #define BTRFS_INODE_PREALLOC (1 << 4)
1494 #define BTRFS_INODE_SYNC (1 << 5)
1495 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1496 #define BTRFS_INODE_APPEND (1 << 7)
1497 #define BTRFS_INODE_NODUMP (1 << 8)
1498 #define BTRFS_INODE_NOATIME (1 << 9)
1499 #define BTRFS_INODE_DIRSYNC (1 << 10)
1500 #define BTRFS_INODE_COMPRESS (1 << 11)
1502 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1504 struct btrfs_map_token {
1505 const struct extent_buffer *eb;
1507 unsigned long offset;
1510 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1511 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1513 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1515 token->kaddr = NULL;
1518 /* some macros to generate set/get functions for the struct fields. This
1519 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1522 #define le8_to_cpu(v) (v)
1523 #define cpu_to_le8(v) (v)
1526 #define read_eb_member(eb, ptr, type, member, result) (\
1527 read_extent_buffer(eb, (char *)(result), \
1528 ((unsigned long)(ptr)) + \
1529 offsetof(type, member), \
1530 sizeof(((type *)0)->member)))
1532 #define write_eb_member(eb, ptr, type, member, result) (\
1533 write_extent_buffer(eb, (char *)(result), \
1534 ((unsigned long)(ptr)) + \
1535 offsetof(type, member), \
1536 sizeof(((type *)0)->member)))
1538 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1539 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1540 const void *ptr, unsigned long off, \
1541 struct btrfs_map_token *token); \
1542 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1543 unsigned long off, u##bits val, \
1544 struct btrfs_map_token *token); \
1545 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1547 unsigned long off) \
1549 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1551 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1552 unsigned long off, u##bits val) \
1554 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1557 DECLARE_BTRFS_SETGET_BITS(8)
1558 DECLARE_BTRFS_SETGET_BITS(16)
1559 DECLARE_BTRFS_SETGET_BITS(32)
1560 DECLARE_BTRFS_SETGET_BITS(64)
1562 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1563 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1566 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1567 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1569 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1572 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1573 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1575 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1577 struct btrfs_map_token *token) \
1579 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1580 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1582 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1583 type *s, u##bits val, \
1584 struct btrfs_map_token *token) \
1586 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1587 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1590 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1591 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1593 const type *p = page_address(eb->pages[0]); \
1594 u##bits res = le##bits##_to_cpu(p->member); \
1597 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1600 type *p = page_address(eb->pages[0]); \
1601 p->member = cpu_to_le##bits(val); \
1604 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1605 static inline u##bits btrfs_##name(const type *s) \
1607 return le##bits##_to_cpu(s->member); \
1609 static inline void btrfs_set_##name(type *s, u##bits val) \
1611 s->member = cpu_to_le##bits(val); \
1615 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1616 struct btrfs_dev_item *s)
1618 BUILD_BUG_ON(sizeof(u64) !=
1619 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1620 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1623 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1624 struct btrfs_dev_item *s,
1627 BUILD_BUG_ON(sizeof(u64) !=
1628 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1629 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1630 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1634 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1635 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1636 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1637 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1638 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1640 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1641 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1642 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1643 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1644 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1645 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1647 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1648 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1650 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1652 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1654 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1656 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1658 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1659 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1661 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1663 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1665 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1668 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1670 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1673 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1675 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1678 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1679 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1680 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1681 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1682 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1683 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1684 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1685 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1686 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1687 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1688 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1690 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1692 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1695 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1696 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1697 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1699 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1701 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1703 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1705 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1706 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1708 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1710 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1711 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1713 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1716 unsigned long offset = (unsigned long)c;
1717 offset += offsetof(struct btrfs_chunk, stripe);
1718 offset += nr * sizeof(struct btrfs_stripe);
1719 return (struct btrfs_stripe *)offset;
1722 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1724 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1727 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1728 struct btrfs_chunk *c, int nr)
1730 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1733 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1734 struct btrfs_chunk *c, int nr)
1736 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1739 /* struct btrfs_block_group_item */
1740 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1742 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1744 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1745 struct btrfs_block_group_item, chunk_objectid, 64);
1747 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1748 struct btrfs_block_group_item, chunk_objectid, 64);
1749 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1750 struct btrfs_block_group_item, flags, 64);
1751 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1752 struct btrfs_block_group_item, flags, 64);
1754 /* struct btrfs_free_space_info */
1755 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1757 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1759 /* struct btrfs_inode_ref */
1760 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1761 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1763 /* struct btrfs_inode_extref */
1764 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1765 parent_objectid, 64);
1766 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1768 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1770 /* struct btrfs_inode_item */
1771 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1772 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1773 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1774 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1775 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1776 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1777 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1778 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1779 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1780 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1781 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1782 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1783 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1785 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1787 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1789 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1790 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1792 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1794 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1795 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1796 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1797 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1798 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1799 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1800 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1801 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1802 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1803 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1805 /* struct btrfs_dev_extent */
1806 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1808 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1809 chunk_objectid, 64);
1810 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1812 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1814 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1816 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1817 return (unsigned long)dev + ptr;
1820 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1821 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1823 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1825 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1828 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1830 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1831 struct btrfs_tree_block_info *item,
1832 struct btrfs_disk_key *key)
1834 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1837 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1838 struct btrfs_tree_block_info *item,
1839 struct btrfs_disk_key *key)
1841 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1844 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1846 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1848 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1850 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1853 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1856 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1858 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1861 static inline u32 btrfs_extent_inline_ref_size(int type)
1863 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1864 type == BTRFS_SHARED_BLOCK_REF_KEY)
1865 return sizeof(struct btrfs_extent_inline_ref);
1866 if (type == BTRFS_SHARED_DATA_REF_KEY)
1867 return sizeof(struct btrfs_shared_data_ref) +
1868 sizeof(struct btrfs_extent_inline_ref);
1869 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1870 return sizeof(struct btrfs_extent_data_ref) +
1871 offsetof(struct btrfs_extent_inline_ref, offset);
1875 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1876 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1878 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1879 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1881 /* struct btrfs_node */
1882 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1883 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1884 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1886 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1889 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1892 ptr = offsetof(struct btrfs_node, ptrs) +
1893 sizeof(struct btrfs_key_ptr) * nr;
1894 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1897 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1901 ptr = offsetof(struct btrfs_node, ptrs) +
1902 sizeof(struct btrfs_key_ptr) * nr;
1903 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1906 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1909 ptr = offsetof(struct btrfs_node, ptrs) +
1910 sizeof(struct btrfs_key_ptr) * nr;
1911 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1914 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1918 ptr = offsetof(struct btrfs_node, ptrs) +
1919 sizeof(struct btrfs_key_ptr) * nr;
1920 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1923 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1925 return offsetof(struct btrfs_node, ptrs) +
1926 sizeof(struct btrfs_key_ptr) * nr;
1929 void btrfs_node_key(const struct extent_buffer *eb,
1930 struct btrfs_disk_key *disk_key, int nr);
1932 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1933 struct btrfs_disk_key *disk_key, int nr)
1936 ptr = btrfs_node_key_ptr_offset(nr);
1937 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1938 struct btrfs_key_ptr, key, disk_key);
1941 /* struct btrfs_item */
1942 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1943 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1944 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1945 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1947 static inline unsigned long btrfs_item_nr_offset(int nr)
1949 return offsetof(struct btrfs_leaf, items) +
1950 sizeof(struct btrfs_item) * nr;
1953 static inline struct btrfs_item *btrfs_item_nr(int nr)
1955 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1958 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1959 struct btrfs_item *item)
1961 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1964 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1966 return btrfs_item_end(eb, btrfs_item_nr(nr));
1969 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1971 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1974 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1976 return btrfs_item_size(eb, btrfs_item_nr(nr));
1979 static inline void btrfs_item_key(const struct extent_buffer *eb,
1980 struct btrfs_disk_key *disk_key, int nr)
1982 struct btrfs_item *item = btrfs_item_nr(nr);
1983 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1986 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1987 struct btrfs_disk_key *disk_key, int nr)
1989 struct btrfs_item *item = btrfs_item_nr(nr);
1990 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1993 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1996 * struct btrfs_root_ref
1998 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1999 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2000 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2002 /* struct btrfs_dir_item */
2003 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2004 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2005 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2006 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2007 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2008 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2010 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2012 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2015 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
2016 const struct btrfs_dir_item *item,
2017 struct btrfs_disk_key *key)
2019 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2022 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2023 struct btrfs_dir_item *item,
2024 const struct btrfs_disk_key *key)
2026 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2029 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2031 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2033 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2036 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2037 const struct btrfs_free_space_header *h,
2038 struct btrfs_disk_key *key)
2040 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2043 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2044 struct btrfs_free_space_header *h,
2045 const struct btrfs_disk_key *key)
2047 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2050 /* struct btrfs_disk_key */
2051 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2053 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2054 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2056 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2057 const struct btrfs_disk_key *disk)
2059 cpu->offset = le64_to_cpu(disk->offset);
2060 cpu->type = disk->type;
2061 cpu->objectid = le64_to_cpu(disk->objectid);
2064 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2065 const struct btrfs_key *cpu)
2067 disk->offset = cpu_to_le64(cpu->offset);
2068 disk->type = cpu->type;
2069 disk->objectid = cpu_to_le64(cpu->objectid);
2072 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2073 struct btrfs_key *key, int nr)
2075 struct btrfs_disk_key disk_key;
2076 btrfs_node_key(eb, &disk_key, nr);
2077 btrfs_disk_key_to_cpu(key, &disk_key);
2080 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2081 struct btrfs_key *key, int nr)
2083 struct btrfs_disk_key disk_key;
2084 btrfs_item_key(eb, &disk_key, nr);
2085 btrfs_disk_key_to_cpu(key, &disk_key);
2088 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2089 const struct btrfs_dir_item *item,
2090 struct btrfs_key *key)
2092 struct btrfs_disk_key disk_key;
2093 btrfs_dir_item_key(eb, item, &disk_key);
2094 btrfs_disk_key_to_cpu(key, &disk_key);
2097 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2102 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2107 /* struct btrfs_header */
2108 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2109 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2111 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2112 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2113 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2114 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2115 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2117 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2118 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2120 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2122 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2124 return (btrfs_header_flags(eb) & flag) == flag;
2127 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2129 u64 flags = btrfs_header_flags(eb);
2130 btrfs_set_header_flags(eb, flags | flag);
2131 return (flags & flag) == flag;
2134 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2136 u64 flags = btrfs_header_flags(eb);
2137 btrfs_set_header_flags(eb, flags & ~flag);
2138 return (flags & flag) == flag;
2141 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2143 u64 flags = btrfs_header_flags(eb);
2144 return flags >> BTRFS_BACKREF_REV_SHIFT;
2147 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2150 u64 flags = btrfs_header_flags(eb);
2151 flags &= ~BTRFS_BACKREF_REV_MASK;
2152 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2153 btrfs_set_header_flags(eb, flags);
2156 static inline unsigned long btrfs_header_fsid(void)
2158 return offsetof(struct btrfs_header, fsid);
2161 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2163 return offsetof(struct btrfs_header, chunk_tree_uuid);
2166 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2168 return btrfs_header_level(eb) == 0;
2171 /* struct btrfs_root_item */
2172 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2174 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2175 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2176 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2178 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2180 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2181 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2182 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2183 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2184 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2185 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2186 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2187 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2189 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2191 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2193 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2195 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2197 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2200 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2202 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2205 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2207 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2210 /* struct btrfs_root_backup */
2211 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2213 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2215 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2216 tree_root_level, 8);
2218 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2220 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2221 chunk_root_gen, 64);
2222 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2223 chunk_root_level, 8);
2225 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2227 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2228 extent_root_gen, 64);
2229 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2230 extent_root_level, 8);
2232 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2234 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2236 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2239 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2241 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2243 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2246 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2248 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2250 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2251 csum_root_level, 8);
2252 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2254 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2256 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2259 /* struct btrfs_balance_item */
2260 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2262 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2263 const struct btrfs_balance_item *bi,
2264 struct btrfs_disk_balance_args *ba)
2266 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2269 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2270 struct btrfs_balance_item *bi,
2271 const struct btrfs_disk_balance_args *ba)
2273 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2276 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2277 const struct btrfs_balance_item *bi,
2278 struct btrfs_disk_balance_args *ba)
2280 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2283 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2284 struct btrfs_balance_item *bi,
2285 const struct btrfs_disk_balance_args *ba)
2287 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2290 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2291 const struct btrfs_balance_item *bi,
2292 struct btrfs_disk_balance_args *ba)
2294 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2297 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2298 struct btrfs_balance_item *bi,
2299 const struct btrfs_disk_balance_args *ba)
2301 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2305 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2306 const struct btrfs_disk_balance_args *disk)
2308 memset(cpu, 0, sizeof(*cpu));
2310 cpu->profiles = le64_to_cpu(disk->profiles);
2311 cpu->usage = le64_to_cpu(disk->usage);
2312 cpu->devid = le64_to_cpu(disk->devid);
2313 cpu->pstart = le64_to_cpu(disk->pstart);
2314 cpu->pend = le64_to_cpu(disk->pend);
2315 cpu->vstart = le64_to_cpu(disk->vstart);
2316 cpu->vend = le64_to_cpu(disk->vend);
2317 cpu->target = le64_to_cpu(disk->target);
2318 cpu->flags = le64_to_cpu(disk->flags);
2319 cpu->limit = le64_to_cpu(disk->limit);
2320 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2321 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2325 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2326 const struct btrfs_balance_args *cpu)
2328 memset(disk, 0, sizeof(*disk));
2330 disk->profiles = cpu_to_le64(cpu->profiles);
2331 disk->usage = cpu_to_le64(cpu->usage);
2332 disk->devid = cpu_to_le64(cpu->devid);
2333 disk->pstart = cpu_to_le64(cpu->pstart);
2334 disk->pend = cpu_to_le64(cpu->pend);
2335 disk->vstart = cpu_to_le64(cpu->vstart);
2336 disk->vend = cpu_to_le64(cpu->vend);
2337 disk->target = cpu_to_le64(cpu->target);
2338 disk->flags = cpu_to_le64(cpu->flags);
2339 disk->limit = cpu_to_le64(cpu->limit);
2340 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2341 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2344 /* struct btrfs_super_block */
2345 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2346 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2347 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2349 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2350 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2351 struct btrfs_super_block, sys_chunk_array_size, 32);
2352 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2353 struct btrfs_super_block, chunk_root_generation, 64);
2354 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2356 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2358 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2359 chunk_root_level, 8);
2360 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2362 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2363 log_root_transid, 64);
2364 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2366 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2368 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2370 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2372 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2374 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2376 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2377 root_dir_objectid, 64);
2378 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2380 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2382 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2383 compat_ro_flags, 64);
2384 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2385 incompat_flags, 64);
2386 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2388 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2389 cache_generation, 64);
2390 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2391 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2392 uuid_tree_generation, 64);
2394 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2396 u16 t = btrfs_super_csum_type(s);
2398 * csum type is validated at mount time
2400 return btrfs_csum_sizes[t];
2405 * The leaf data grows from end-to-front in the node.
2406 * this returns the address of the start of the last item,
2407 * which is the stop of the leaf data stack
2409 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2410 const struct extent_buffer *leaf)
2412 u32 nr = btrfs_header_nritems(leaf);
2415 return BTRFS_LEAF_DATA_SIZE(fs_info);
2416 return btrfs_item_offset_nr(leaf, nr - 1);
2419 /* struct btrfs_file_extent_item */
2420 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2421 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2422 struct btrfs_file_extent_item, disk_bytenr, 64);
2423 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2424 struct btrfs_file_extent_item, offset, 64);
2425 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2426 struct btrfs_file_extent_item, generation, 64);
2427 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2428 struct btrfs_file_extent_item, num_bytes, 64);
2429 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2430 struct btrfs_file_extent_item, disk_num_bytes, 64);
2431 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2432 struct btrfs_file_extent_item, compression, 8);
2434 static inline unsigned long
2435 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2437 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2440 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2442 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2445 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2447 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2449 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2450 disk_num_bytes, 64);
2451 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2453 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2455 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2457 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2459 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2461 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2462 other_encoding, 16);
2465 * this returns the number of bytes used by the item on disk, minus the
2466 * size of any extent headers. If a file is compressed on disk, this is
2467 * the compressed size
2469 static inline u32 btrfs_file_extent_inline_item_len(
2470 const struct extent_buffer *eb,
2471 struct btrfs_item *e)
2473 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2476 /* btrfs_dev_stats_item */
2477 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2478 const struct btrfs_dev_stats_item *ptr,
2483 read_extent_buffer(eb, &val,
2484 offsetof(struct btrfs_dev_stats_item, values) +
2485 ((unsigned long)ptr) + (index * sizeof(u64)),
2490 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2491 struct btrfs_dev_stats_item *ptr,
2494 write_extent_buffer(eb, &val,
2495 offsetof(struct btrfs_dev_stats_item, values) +
2496 ((unsigned long)ptr) + (index * sizeof(u64)),
2500 /* btrfs_qgroup_status_item */
2501 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2503 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2505 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2507 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2510 /* btrfs_qgroup_info_item */
2511 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2513 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2514 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2516 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2517 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2520 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2521 struct btrfs_qgroup_info_item, generation, 64);
2522 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2524 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2525 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2526 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2528 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2529 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2531 /* btrfs_qgroup_limit_item */
2532 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2534 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2536 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2538 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2540 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2543 /* btrfs_dev_replace_item */
2544 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2545 struct btrfs_dev_replace_item, src_devid, 64);
2546 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2547 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2549 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2551 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2553 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2555 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2556 num_write_errors, 64);
2557 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2558 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2560 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2562 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2565 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2566 struct btrfs_dev_replace_item, src_devid, 64);
2567 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2568 struct btrfs_dev_replace_item,
2569 cont_reading_from_srcdev_mode, 64);
2570 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2571 struct btrfs_dev_replace_item, replace_state, 64);
2572 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2573 struct btrfs_dev_replace_item, time_started, 64);
2574 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2575 struct btrfs_dev_replace_item, time_stopped, 64);
2576 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2577 struct btrfs_dev_replace_item, num_write_errors, 64);
2578 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2579 struct btrfs_dev_replace_item,
2580 num_uncorrectable_read_errors, 64);
2581 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2582 struct btrfs_dev_replace_item, cursor_left, 64);
2583 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2584 struct btrfs_dev_replace_item, cursor_right, 64);
2586 /* helper function to cast into the data area of the leaf. */
2587 #define btrfs_item_ptr(leaf, slot, type) \
2588 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2589 btrfs_item_offset_nr(leaf, slot)))
2591 #define btrfs_item_ptr_offset(leaf, slot) \
2592 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2593 btrfs_item_offset_nr(leaf, slot)))
2595 static inline u64 btrfs_name_hash(const char *name, int len)
2597 return crc32c((u32)~1, name, len);
2601 * Figure the key offset of an extended inode ref
2603 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2606 return (u64) crc32c(parent_objectid, name, len);
2609 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2611 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2612 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2615 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2617 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2622 enum btrfs_inline_ref_type {
2623 BTRFS_REF_TYPE_INVALID,
2624 BTRFS_REF_TYPE_BLOCK,
2625 BTRFS_REF_TYPE_DATA,
2629 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2630 struct btrfs_extent_inline_ref *iref,
2631 enum btrfs_inline_ref_type is_data);
2633 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2635 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2638 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2642 * Doing a truncate won't result in new nodes or leaves, just what we need for
2645 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2648 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2651 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans);
2652 bool btrfs_check_space_for_delayed_refs(struct btrfs_fs_info *fs_info);
2653 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2655 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2656 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2657 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2658 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2659 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2660 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2661 unsigned long count);
2662 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2663 unsigned long count, u64 transid, int wait);
2664 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2665 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2666 struct btrfs_fs_info *fs_info, u64 bytenr,
2667 u64 offset, int metadata, u64 *refs, u64 *flags);
2668 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2669 u64 bytenr, u64 num, int reserved);
2670 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2671 u64 bytenr, u64 num_bytes);
2672 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2673 struct extent_buffer *eb);
2674 int btrfs_cross_ref_exist(struct btrfs_root *root,
2675 u64 objectid, u64 offset, u64 bytenr);
2676 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2677 struct btrfs_fs_info *info,
2679 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2680 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2681 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2682 struct btrfs_root *root,
2683 u64 parent, u64 root_objectid,
2684 const struct btrfs_disk_key *key,
2685 int level, u64 hint,
2687 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2688 struct btrfs_root *root,
2689 struct extent_buffer *buf,
2690 u64 parent, int last_ref);
2691 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2692 struct btrfs_root *root, u64 owner,
2693 u64 offset, u64 ram_bytes,
2694 struct btrfs_key *ins);
2695 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2696 u64 root_objectid, u64 owner, u64 offset,
2697 struct btrfs_key *ins);
2698 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2699 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2700 struct btrfs_key *ins, int is_data, int delalloc);
2701 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2702 struct extent_buffer *buf, int full_backref);
2703 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2704 struct extent_buffer *buf, int full_backref);
2705 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2706 struct btrfs_fs_info *fs_info,
2707 u64 bytenr, u64 num_bytes, u64 flags,
2708 int level, int is_data);
2709 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2710 struct btrfs_root *root,
2711 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2712 u64 owner, u64 offset);
2714 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2715 u64 start, u64 len, int delalloc);
2716 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2717 u64 start, u64 len);
2718 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2719 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2720 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2721 struct btrfs_root *root,
2722 u64 bytenr, u64 num_bytes, u64 parent,
2723 u64 root_objectid, u64 owner, u64 offset);
2725 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2726 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2727 struct btrfs_fs_info *fs_info);
2728 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2729 struct btrfs_fs_info *fs_info);
2730 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2731 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2732 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2733 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2734 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2735 u64 bytes_used, u64 type, u64 chunk_offset,
2737 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2738 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2739 struct btrfs_fs_info *fs_info,
2740 const u64 chunk_offset);
2741 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2742 u64 group_start, struct extent_map *em);
2743 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2744 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2745 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2746 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2747 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2748 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2749 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2750 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2752 enum btrfs_reserve_flush_enum {
2753 /* If we are in the transaction, we can't flush anything.*/
2754 BTRFS_RESERVE_NO_FLUSH,
2756 * Flushing delalloc may cause deadlock somewhere, in this
2757 * case, use FLUSH LIMIT
2759 BTRFS_RESERVE_FLUSH_LIMIT,
2760 BTRFS_RESERVE_FLUSH_ALL,
2763 enum btrfs_flush_state {
2764 FLUSH_DELAYED_ITEMS_NR = 1,
2765 FLUSH_DELAYED_ITEMS = 2,
2766 FLUSH_DELAYED_REFS_NR = 3,
2767 FLUSH_DELAYED_REFS = 4,
2769 FLUSH_DELALLOC_WAIT = 6,
2774 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2775 int btrfs_check_data_free_space(struct inode *inode,
2776 struct extent_changeset **reserved, u64 start, u64 len);
2777 void btrfs_free_reserved_data_space(struct inode *inode,
2778 struct extent_changeset *reserved, u64 start, u64 len);
2779 void btrfs_delalloc_release_space(struct inode *inode,
2780 struct extent_changeset *reserved,
2781 u64 start, u64 len, bool qgroup_free);
2782 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2784 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2785 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2786 struct btrfs_block_rsv *rsv,
2787 int nitems, bool use_global_rsv);
2788 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2789 struct btrfs_block_rsv *rsv);
2790 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2793 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2794 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2796 int btrfs_delalloc_reserve_space(struct inode *inode,
2797 struct extent_changeset **reserved, u64 start, u64 len);
2798 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2799 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2800 unsigned short type);
2801 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2802 struct btrfs_block_rsv *rsv,
2803 unsigned short type);
2804 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2805 struct btrfs_block_rsv *rsv);
2806 int btrfs_block_rsv_add(struct btrfs_root *root,
2807 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2808 enum btrfs_reserve_flush_enum flush);
2809 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2810 int btrfs_block_rsv_refill(struct btrfs_root *root,
2811 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2812 enum btrfs_reserve_flush_enum flush);
2813 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2814 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2816 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2817 struct btrfs_block_rsv *dest, u64 num_bytes,
2819 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2820 struct btrfs_block_rsv *block_rsv,
2822 void btrfs_delayed_refs_rsv_release(struct btrfs_fs_info *fs_info, int nr);
2823 void btrfs_update_delayed_refs_rsv(struct btrfs_trans_handle *trans);
2824 int btrfs_delayed_refs_rsv_refill(struct btrfs_fs_info *fs_info,
2825 enum btrfs_reserve_flush_enum flush);
2826 void btrfs_migrate_to_delayed_refs_rsv(struct btrfs_fs_info *fs_info,
2827 struct btrfs_block_rsv *src,
2829 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2830 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2831 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2832 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2833 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2834 u64 start, u64 end);
2835 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2836 u64 num_bytes, u64 *actual_bytes);
2837 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2838 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2840 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2841 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2842 struct btrfs_fs_info *fs_info);
2843 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2844 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2845 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2846 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2847 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2848 u64 start, u64 end);
2849 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2852 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2853 int level, int *slot);
2854 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2855 int btrfs_previous_item(struct btrfs_root *root,
2856 struct btrfs_path *path, u64 min_objectid,
2858 int btrfs_previous_extent_item(struct btrfs_root *root,
2859 struct btrfs_path *path, u64 min_objectid);
2860 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2861 struct btrfs_path *path,
2862 const struct btrfs_key *new_key);
2863 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2864 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2865 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2866 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2867 struct btrfs_key *key, int lowest_level,
2869 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2870 struct btrfs_path *path,
2872 enum btrfs_compare_tree_result {
2873 BTRFS_COMPARE_TREE_NEW,
2874 BTRFS_COMPARE_TREE_DELETED,
2875 BTRFS_COMPARE_TREE_CHANGED,
2876 BTRFS_COMPARE_TREE_SAME,
2878 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2879 struct btrfs_path *right_path,
2880 struct btrfs_key *key,
2881 enum btrfs_compare_tree_result result,
2883 int btrfs_compare_trees(struct btrfs_root *left_root,
2884 struct btrfs_root *right_root,
2885 btrfs_changed_cb_t cb, void *ctx);
2886 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2887 struct btrfs_root *root, struct extent_buffer *buf,
2888 struct extent_buffer *parent, int parent_slot,
2889 struct extent_buffer **cow_ret);
2890 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2891 struct btrfs_root *root,
2892 struct extent_buffer *buf,
2893 struct extent_buffer **cow_ret, u64 new_root_objectid);
2894 int btrfs_block_can_be_shared(struct btrfs_root *root,
2895 struct extent_buffer *buf);
2896 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2898 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2899 struct btrfs_path *path, u32 new_size, int from_end);
2900 int btrfs_split_item(struct btrfs_trans_handle *trans,
2901 struct btrfs_root *root,
2902 struct btrfs_path *path,
2903 const struct btrfs_key *new_key,
2904 unsigned long split_offset);
2905 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2906 struct btrfs_root *root,
2907 struct btrfs_path *path,
2908 const struct btrfs_key *new_key);
2909 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2910 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2911 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2912 const struct btrfs_key *key, struct btrfs_path *p,
2913 int ins_len, int cow);
2914 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2915 struct btrfs_path *p, u64 time_seq);
2916 int btrfs_search_slot_for_read(struct btrfs_root *root,
2917 const struct btrfs_key *key,
2918 struct btrfs_path *p, int find_higher,
2920 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2921 struct btrfs_root *root, struct extent_buffer *parent,
2922 int start_slot, u64 *last_ret,
2923 struct btrfs_key *progress);
2924 void btrfs_release_path(struct btrfs_path *p);
2925 struct btrfs_path *btrfs_alloc_path(void);
2926 void btrfs_free_path(struct btrfs_path *p);
2927 void btrfs_set_path_blocking(struct btrfs_path *p);
2928 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2930 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2931 struct btrfs_path *path, int slot, int nr);
2932 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2933 struct btrfs_root *root,
2934 struct btrfs_path *path)
2936 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2939 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2940 const struct btrfs_key *cpu_key, u32 *data_size,
2941 u32 total_data, u32 total_size, int nr);
2942 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2943 const struct btrfs_key *key, void *data, u32 data_size);
2944 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2945 struct btrfs_root *root,
2946 struct btrfs_path *path,
2947 const struct btrfs_key *cpu_key, u32 *data_size,
2950 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2951 struct btrfs_root *root,
2952 struct btrfs_path *path,
2953 const struct btrfs_key *key,
2956 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2959 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2960 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2961 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2963 static inline int btrfs_next_old_item(struct btrfs_root *root,
2964 struct btrfs_path *p, u64 time_seq)
2967 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2968 return btrfs_next_old_leaf(root, p, time_seq);
2971 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2973 return btrfs_next_old_item(root, p, 0);
2975 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2976 struct extent_buffer *leaf);
2977 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2978 struct btrfs_block_rsv *block_rsv,
2979 int update_ref, int for_reloc);
2980 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2981 struct btrfs_root *root,
2982 struct extent_buffer *node,
2983 struct extent_buffer *parent);
2984 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2987 * Do it this way so we only ever do one test_bit in the normal case.
2989 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2990 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2998 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2999 * anything except sleeping. This function is used to check the status of
3002 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
3004 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
3007 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3009 kfree(fs_info->balance_ctl);
3010 kfree(fs_info->delayed_root);
3011 kfree(fs_info->extent_root);
3012 kfree(fs_info->tree_root);
3013 kfree(fs_info->chunk_root);
3014 kfree(fs_info->dev_root);
3015 kfree(fs_info->csum_root);
3016 kfree(fs_info->quota_root);
3017 kfree(fs_info->uuid_root);
3018 kfree(fs_info->free_space_root);
3019 kfree(fs_info->super_copy);
3020 kfree(fs_info->super_for_commit);
3024 /* tree mod log functions from ctree.c */
3025 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3026 struct seq_list *elem);
3027 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3028 struct seq_list *elem);
3029 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3032 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3033 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3035 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3036 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3038 int btrfs_del_root(struct btrfs_trans_handle *trans,
3039 const struct btrfs_key *key);
3040 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3041 const struct btrfs_key *key,
3042 struct btrfs_root_item *item);
3043 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3044 struct btrfs_root *root,
3045 struct btrfs_key *key,
3046 struct btrfs_root_item *item);
3047 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3048 struct btrfs_path *path, struct btrfs_root_item *root_item,
3049 struct btrfs_key *root_key);
3050 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3051 void btrfs_set_root_node(struct btrfs_root_item *item,
3052 struct extent_buffer *node);
3053 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3054 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3055 struct btrfs_root *root);
3058 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3060 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3062 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3063 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3067 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3068 const char *name, int name_len);
3069 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3070 int name_len, struct btrfs_inode *dir,
3071 struct btrfs_key *location, u8 type, u64 index);
3072 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3073 struct btrfs_root *root,
3074 struct btrfs_path *path, u64 dir,
3075 const char *name, int name_len,
3077 struct btrfs_dir_item *
3078 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3079 struct btrfs_root *root,
3080 struct btrfs_path *path, u64 dir,
3081 u64 objectid, const char *name, int name_len,
3083 struct btrfs_dir_item *
3084 btrfs_search_dir_index_item(struct btrfs_root *root,
3085 struct btrfs_path *path, u64 dirid,
3086 const char *name, int name_len);
3087 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3088 struct btrfs_root *root,
3089 struct btrfs_path *path,
3090 struct btrfs_dir_item *di);
3091 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3092 struct btrfs_root *root,
3093 struct btrfs_path *path, u64 objectid,
3094 const char *name, u16 name_len,
3095 const void *data, u16 data_len);
3096 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3097 struct btrfs_root *root,
3098 struct btrfs_path *path, u64 dir,
3099 const char *name, u16 name_len,
3101 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3102 struct btrfs_path *path,
3107 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3108 struct btrfs_root *root, u64 offset);
3109 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3110 struct btrfs_root *root, u64 offset);
3111 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3114 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3115 struct btrfs_root *root,
3116 const char *name, int name_len,
3117 u64 inode_objectid, u64 ref_objectid, u64 index);
3118 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3119 struct btrfs_root *root,
3120 const char *name, int name_len,
3121 u64 inode_objectid, u64 ref_objectid, u64 *index);
3122 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3123 struct btrfs_root *root,
3124 struct btrfs_path *path, u64 objectid);
3125 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3126 *root, struct btrfs_path *path,
3127 struct btrfs_key *location, int mod);
3129 struct btrfs_inode_extref *
3130 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3131 struct btrfs_root *root,
3132 struct btrfs_path *path,
3133 const char *name, int name_len,
3134 u64 inode_objectid, u64 ref_objectid, int ins_len,
3137 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3139 int name_len, struct btrfs_inode_ref **ref_ret);
3140 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3141 u64 ref_objectid, const char *name,
3143 struct btrfs_inode_extref **extref_ret);
3146 struct btrfs_dio_private;
3147 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3148 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3149 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3150 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3151 u64 logical_offset);
3152 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root,
3154 u64 objectid, u64 pos,
3155 u64 disk_offset, u64 disk_num_bytes,
3156 u64 num_bytes, u64 offset, u64 ram_bytes,
3157 u8 compression, u8 encryption, u16 other_encoding);
3158 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root,
3160 struct btrfs_path *path, u64 objectid,
3161 u64 bytenr, int mod);
3162 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_ordered_sum *sums);
3165 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3166 u64 file_start, int contig);
3167 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3168 struct list_head *list, int search_commit);
3169 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3170 const struct btrfs_path *path,
3171 struct btrfs_file_extent_item *fi,
3172 const bool new_inline,
3173 struct extent_map *em);
3176 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3177 struct page *page, size_t pg_offset, u64 start,
3178 u64 len, int create);
3179 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3180 u64 *orig_start, u64 *orig_block_len,
3183 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3184 struct btrfs_inode *inode);
3185 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3186 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3187 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3188 struct btrfs_root *root,
3189 struct btrfs_inode *dir, struct btrfs_inode *inode,
3190 const char *name, int name_len);
3191 int btrfs_add_link(struct btrfs_trans_handle *trans,
3192 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3193 const char *name, int name_len, int add_backref, u64 index);
3194 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3195 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3197 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3198 struct btrfs_root *root,
3199 struct inode *inode, u64 new_size,
3202 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3203 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3204 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3205 unsigned int extra_bits,
3206 struct extent_state **cached_state, int dedupe);
3207 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3208 struct btrfs_root *new_root,
3209 struct btrfs_root *parent_root,
3211 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3213 void btrfs_clear_delalloc_extent(struct inode *inode,
3214 struct extent_state *state, unsigned *bits);
3215 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3216 struct extent_state *other);
3217 void btrfs_split_delalloc_extent(struct inode *inode,
3218 struct extent_state *orig, u64 split);
3219 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3220 unsigned long bio_flags);
3221 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3222 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3223 int btrfs_readpage(struct file *file, struct page *page);
3224 void btrfs_evict_inode(struct inode *inode);
3225 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3226 struct inode *btrfs_alloc_inode(struct super_block *sb);
3227 void btrfs_destroy_inode(struct inode *inode);
3228 int btrfs_drop_inode(struct inode *inode);
3229 int __init btrfs_init_cachep(void);
3230 void __cold btrfs_destroy_cachep(void);
3231 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3232 struct btrfs_root *root, int *new,
3233 struct btrfs_path *path);
3234 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3235 struct btrfs_root *root, int *was_new);
3236 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3237 struct page *page, size_t pg_offset,
3238 u64 start, u64 end, int create);
3239 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3240 struct btrfs_root *root,
3241 struct inode *inode);
3242 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3243 struct btrfs_root *root, struct inode *inode);
3244 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3245 struct btrfs_inode *inode);
3246 int btrfs_orphan_cleanup(struct btrfs_root *root);
3247 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3248 void btrfs_add_delayed_iput(struct inode *inode);
3249 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3250 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3251 u64 start, u64 num_bytes, u64 min_size,
3252 loff_t actual_len, u64 *alloc_hint);
3253 int btrfs_prealloc_file_range_trans(struct inode *inode,
3254 struct btrfs_trans_handle *trans, int mode,
3255 u64 start, u64 num_bytes, u64 min_size,
3256 loff_t actual_len, u64 *alloc_hint);
3257 int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
3258 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3259 struct writeback_control *wbc);
3260 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3261 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3262 u64 end, int uptodate);
3263 extern const struct dentry_operations btrfs_dentry_operations;
3266 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3267 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3268 int btrfs_ioctl_get_supported_features(void __user *arg);
3269 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3270 int btrfs_is_empty_uuid(u8 *uuid);
3271 int btrfs_defrag_file(struct inode *inode, struct file *file,
3272 struct btrfs_ioctl_defrag_range_args *range,
3273 u64 newer_than, unsigned long max_pages);
3274 void btrfs_get_block_group_info(struct list_head *groups_list,
3275 struct btrfs_ioctl_space_info *space);
3276 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3277 struct btrfs_ioctl_balance_args *bargs);
3280 int __init btrfs_auto_defrag_init(void);
3281 void __cold btrfs_auto_defrag_exit(void);
3282 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3283 struct btrfs_inode *inode);
3284 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3285 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3286 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3287 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3289 extern const struct file_operations btrfs_file_operations;
3290 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3291 struct btrfs_root *root, struct inode *inode,
3292 struct btrfs_path *path, u64 start, u64 end,
3293 u64 *drop_end, int drop_cache,
3295 u32 extent_item_size,
3297 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3298 struct btrfs_root *root, struct inode *inode, u64 start,
3299 u64 end, int drop_cache);
3300 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3301 struct btrfs_inode *inode, u64 start, u64 end);
3302 int btrfs_release_file(struct inode *inode, struct file *file);
3303 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3304 size_t num_pages, loff_t pos, size_t write_bytes,
3305 struct extent_state **cached);
3306 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3307 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
3308 struct file *file_out, loff_t pos_out,
3309 loff_t len, unsigned int remap_flags);
3312 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3313 struct btrfs_root *root);
3316 int __init btrfs_init_sysfs(void);
3317 void __cold btrfs_exit_sysfs(void);
3318 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3319 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3322 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3323 unsigned long new_flags);
3324 int btrfs_sync_fs(struct super_block *sb, int wait);
3326 static inline __printf(2, 3) __cold
3327 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3331 #ifdef CONFIG_PRINTK
3334 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3336 #define btrfs_printk(fs_info, fmt, args...) \
3337 btrfs_no_printk(fs_info, fmt, ##args)
3340 #define btrfs_emerg(fs_info, fmt, args...) \
3341 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3342 #define btrfs_alert(fs_info, fmt, args...) \
3343 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3344 #define btrfs_crit(fs_info, fmt, args...) \
3345 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3346 #define btrfs_err(fs_info, fmt, args...) \
3347 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3348 #define btrfs_warn(fs_info, fmt, args...) \
3349 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3350 #define btrfs_notice(fs_info, fmt, args...) \
3351 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3352 #define btrfs_info(fs_info, fmt, args...) \
3353 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3356 * Wrappers that use printk_in_rcu
3358 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3359 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3360 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3361 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3362 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3363 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3364 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3365 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3366 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3367 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3368 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3369 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3370 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3371 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3374 * Wrappers that use a ratelimited printk_in_rcu
3376 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3377 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3378 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3379 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3380 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3381 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3382 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3383 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3384 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3385 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3386 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3387 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3388 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3389 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3392 * Wrappers that use a ratelimited printk
3394 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3395 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3396 #define btrfs_alert_rl(fs_info, fmt, args...) \
3397 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3398 #define btrfs_crit_rl(fs_info, fmt, args...) \
3399 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3400 #define btrfs_err_rl(fs_info, fmt, args...) \
3401 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3402 #define btrfs_warn_rl(fs_info, fmt, args...) \
3403 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3404 #define btrfs_notice_rl(fs_info, fmt, args...) \
3405 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3406 #define btrfs_info_rl(fs_info, fmt, args...) \
3407 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3409 #if defined(CONFIG_DYNAMIC_DEBUG)
3410 #define btrfs_debug(fs_info, fmt, args...) \
3412 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3413 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3414 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3416 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3418 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3419 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3420 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3422 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3424 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3425 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3426 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3429 #define btrfs_debug_rl(fs_info, fmt, args...) \
3431 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3432 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3433 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3436 #elif defined(DEBUG)
3437 #define btrfs_debug(fs_info, fmt, args...) \
3438 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3439 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3440 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3441 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3442 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3443 #define btrfs_debug_rl(fs_info, fmt, args...) \
3444 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3446 #define btrfs_debug(fs_info, fmt, args...) \
3447 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3448 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3449 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3450 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3451 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3452 #define btrfs_debug_rl(fs_info, fmt, args...) \
3453 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3456 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3459 btrfs_printk(fs_info, fmt, ##args); \
3460 rcu_read_unlock(); \
3463 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3466 btrfs_no_printk(fs_info, fmt, ##args); \
3467 rcu_read_unlock(); \
3470 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3472 static DEFINE_RATELIMIT_STATE(_rs, \
3473 DEFAULT_RATELIMIT_INTERVAL, \
3474 DEFAULT_RATELIMIT_BURST); \
3475 if (__ratelimit(&_rs)) \
3476 btrfs_printk(fs_info, fmt, ##args); \
3479 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3482 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3483 rcu_read_unlock(); \
3486 #ifdef CONFIG_BTRFS_ASSERT
3489 static inline void assfail(const char *expr, const char *file, int line)
3491 pr_err("assertion failed: %s, file: %s, line: %d\n",
3496 #define ASSERT(expr) \
3497 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3499 #define ASSERT(expr) ((void)0)
3503 * Use that for functions that are conditionally exported for sanity tests but
3506 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3507 #define EXPORT_FOR_TESTS static
3509 #define EXPORT_FOR_TESTS
3513 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3516 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3521 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3522 unsigned int line, int errno, const char *fmt, ...);
3524 const char *btrfs_decode_error(int errno);
3527 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3528 const char *function,
3529 unsigned int line, int errno);
3532 * Call btrfs_abort_transaction as early as possible when an error condition is
3533 * detected, that way the exact line number is reported.
3535 #define btrfs_abort_transaction(trans, errno) \
3537 /* Report first abort since mount */ \
3538 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3539 &((trans)->fs_info->fs_state))) { \
3540 if ((errno) != -EIO) { \
3541 WARN(1, KERN_DEBUG \
3542 "BTRFS: Transaction aborted (error %d)\n", \
3545 btrfs_debug((trans)->fs_info, \
3546 "Transaction aborted (error %d)", \
3550 __btrfs_abort_transaction((trans), __func__, \
3551 __LINE__, (errno)); \
3554 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3556 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3557 (errno), fmt, ##args); \
3562 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3563 unsigned int line, int errno, const char *fmt, ...);
3565 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3566 * will panic(). Otherwise we BUG() here.
3568 #define btrfs_panic(fs_info, errno, fmt, args...) \
3570 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3575 /* compatibility and incompatibility defines */
3577 #define btrfs_set_fs_incompat(__fs_info, opt) \
3578 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3580 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3583 struct btrfs_super_block *disk_super;
3586 disk_super = fs_info->super_copy;
3587 features = btrfs_super_incompat_flags(disk_super);
3588 if (!(features & flag)) {
3589 spin_lock(&fs_info->super_lock);
3590 features = btrfs_super_incompat_flags(disk_super);
3591 if (!(features & flag)) {
3593 btrfs_set_super_incompat_flags(disk_super, features);
3594 btrfs_info(fs_info, "setting %llu feature flag",
3597 spin_unlock(&fs_info->super_lock);
3601 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3602 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3604 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3607 struct btrfs_super_block *disk_super;
3610 disk_super = fs_info->super_copy;
3611 features = btrfs_super_incompat_flags(disk_super);
3612 if (features & flag) {
3613 spin_lock(&fs_info->super_lock);
3614 features = btrfs_super_incompat_flags(disk_super);
3615 if (features & flag) {
3617 btrfs_set_super_incompat_flags(disk_super, features);
3618 btrfs_info(fs_info, "clearing %llu feature flag",
3621 spin_unlock(&fs_info->super_lock);
3625 #define btrfs_fs_incompat(fs_info, opt) \
3626 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3628 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3630 struct btrfs_super_block *disk_super;
3631 disk_super = fs_info->super_copy;
3632 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3635 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3636 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3638 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3641 struct btrfs_super_block *disk_super;
3644 disk_super = fs_info->super_copy;
3645 features = btrfs_super_compat_ro_flags(disk_super);
3646 if (!(features & flag)) {
3647 spin_lock(&fs_info->super_lock);
3648 features = btrfs_super_compat_ro_flags(disk_super);
3649 if (!(features & flag)) {
3651 btrfs_set_super_compat_ro_flags(disk_super, features);
3652 btrfs_info(fs_info, "setting %llu ro feature flag",
3655 spin_unlock(&fs_info->super_lock);
3659 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3660 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3662 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3665 struct btrfs_super_block *disk_super;
3668 disk_super = fs_info->super_copy;
3669 features = btrfs_super_compat_ro_flags(disk_super);
3670 if (features & flag) {
3671 spin_lock(&fs_info->super_lock);
3672 features = btrfs_super_compat_ro_flags(disk_super);
3673 if (features & flag) {
3675 btrfs_set_super_compat_ro_flags(disk_super, features);
3676 btrfs_info(fs_info, "clearing %llu ro feature flag",
3679 spin_unlock(&fs_info->super_lock);
3683 #define btrfs_fs_compat_ro(fs_info, opt) \
3684 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3686 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3688 struct btrfs_super_block *disk_super;
3689 disk_super = fs_info->super_copy;
3690 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3694 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3695 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3696 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3697 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3698 struct inode *inode, struct inode *dir);
3700 #define btrfs_get_acl NULL
3701 #define btrfs_set_acl NULL
3702 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3703 struct inode *inode, struct inode *dir)
3710 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3711 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3712 struct btrfs_root *root);
3713 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3714 struct btrfs_root *root);
3715 int btrfs_recover_relocation(struct btrfs_root *root);
3716 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3717 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3718 struct btrfs_root *root, struct extent_buffer *buf,
3719 struct extent_buffer *cow);
3720 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3721 u64 *bytes_to_reserve);
3722 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3723 struct btrfs_pending_snapshot *pending);
3726 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3727 u64 end, struct btrfs_scrub_progress *progress,
3728 int readonly, int is_dev_replace);
3729 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3730 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3731 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3732 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3733 struct btrfs_device *dev);
3734 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3735 struct btrfs_scrub_progress *progress);
3736 static inline void btrfs_init_full_stripe_locks_tree(
3737 struct btrfs_full_stripe_locks_tree *locks_root)
3739 locks_root->root = RB_ROOT;
3740 mutex_init(&locks_root->lock);
3744 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3745 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3746 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3748 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3750 btrfs_bio_counter_sub(fs_info, 1);
3754 struct reada_control {
3755 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3756 struct btrfs_key key_start;
3757 struct btrfs_key key_end; /* exclusive */
3760 wait_queue_head_t wait;
3762 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3763 struct btrfs_key *start, struct btrfs_key *end);
3764 int btrfs_reada_wait(void *handle);
3765 void btrfs_reada_detach(void *handle);
3766 int btree_readahead_hook(struct extent_buffer *eb, int err);
3768 static inline int is_fstree(u64 rootid)
3770 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3771 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3772 !btrfs_qgroup_level(rootid)))
3777 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3779 return signal_pending(current);
3782 /* Sanity test specific functions */
3783 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3784 void btrfs_test_inode_set_ops(struct inode *inode);
3785 void btrfs_test_destroy_inode(struct inode *inode);
3787 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3789 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3792 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3798 static inline void cond_wake_up(struct wait_queue_head *wq)
3801 * This implies a full smp_mb barrier, see comments for
3802 * waitqueue_active why.
3804 if (wq_has_sleeper(wq))
3808 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3811 * Special case for conditional wakeup where the barrier required for
3812 * waitqueue_active is implied by some of the preceding code. Eg. one
3813 * of such atomic operations (atomic_dec_and_return, ...), or a
3814 * unlock/lock sequence, etc.
3816 if (waitqueue_active(wq))