1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <linux/kobject.h>
20 #include <trace/events/btrfs.h>
21 #include <asm/kmap_types.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle;
36 struct btrfs_transaction;
37 struct btrfs_pending_snapshot;
38 struct btrfs_delayed_ref_root;
39 extern struct kmem_cache *btrfs_trans_handle_cachep;
40 extern struct kmem_cache *btrfs_bit_radix_cachep;
41 extern struct kmem_cache *btrfs_path_cachep;
42 extern struct kmem_cache *btrfs_free_space_cachep;
43 struct btrfs_ordered_sum;
45 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
47 #define BTRFS_MAX_MIRRORS 3
49 #define BTRFS_MAX_LEVEL 8
51 #define BTRFS_OLDEST_GENERATION 0ULL
54 * the max metadata block size. This limit is somewhat artificial,
55 * but the memmove costs go through the roof for larger blocks.
57 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
60 * we can actually store much bigger names, but lets not confuse the rest
63 #define BTRFS_NAME_LEN 255
66 * Theoretical limit is larger, but we keep this down to a sane
67 * value. That should limit greatly the possibility of collisions on
70 #define BTRFS_LINK_MAX 65535U
72 /* four bytes for CRC32 */
73 static const int btrfs_csum_sizes[] = { 4 };
75 #define BTRFS_EMPTY_DIR_SIZE 0
77 /* ioprio of readahead is set to idle */
78 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
80 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
83 * Use large batch size to reduce overhead of metadata updates. On the reader
84 * side, we only read it when we are close to ENOSPC and the read overhead is
85 * mostly related to the number of CPUs, so it is OK to use arbitrary large
88 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
90 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
94 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
96 static inline u32 count_max_extents(u64 size)
98 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
101 struct btrfs_mapping_tree {
102 struct extent_map_tree map_tree;
105 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
107 BUG_ON(num_stripes == 0);
108 return sizeof(struct btrfs_chunk) +
109 sizeof(struct btrfs_stripe) * (num_stripes - 1);
113 * Runtime (in-memory) states of filesystem
116 /* Global indicator of serious filesystem errors */
117 BTRFS_FS_STATE_ERROR,
119 * Filesystem is being remounted, allow to skip some operations, like
122 BTRFS_FS_STATE_REMOUNTING,
123 /* Track if a transaction abort has been reported on this filesystem */
124 BTRFS_FS_STATE_TRANS_ABORTED,
126 * Bio operations should be blocked on this filesystem because a source
127 * or target device is being destroyed as part of a device replace
129 BTRFS_FS_STATE_DEV_REPLACING,
130 /* The btrfs_fs_info created for self-tests */
131 BTRFS_FS_STATE_DUMMY_FS_INFO,
134 #define BTRFS_BACKREF_REV_MAX 256
135 #define BTRFS_BACKREF_REV_SHIFT 56
136 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
137 BTRFS_BACKREF_REV_SHIFT)
139 #define BTRFS_OLD_BACKREF_REV 0
140 #define BTRFS_MIXED_BACKREF_REV 1
143 * every tree block (leaf or node) starts with this header.
145 struct btrfs_header {
146 /* these first four must match the super block */
147 u8 csum[BTRFS_CSUM_SIZE];
148 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
149 __le64 bytenr; /* which block this node is supposed to live in */
152 /* allowed to be different from the super from here on down */
153 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
158 } __attribute__ ((__packed__));
161 * this is a very generous portion of the super block, giving us
162 * room to translate 14 chunks with 3 stripes each.
164 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
167 * just in case we somehow lose the roots and are not able to mount,
168 * we store an array of the roots from previous transactions
171 #define BTRFS_NUM_BACKUP_ROOTS 4
172 struct btrfs_root_backup {
174 __le64 tree_root_gen;
177 __le64 chunk_root_gen;
180 __le64 extent_root_gen;
189 __le64 csum_root_gen;
199 u8 extent_root_level;
203 /* future and to align */
205 } __attribute__ ((__packed__));
208 * the super block basically lists the main trees of the FS
209 * it currently lacks any block count etc etc
211 struct btrfs_super_block {
212 /* the first 4 fields must match struct btrfs_header */
213 u8 csum[BTRFS_CSUM_SIZE];
214 /* FS specific UUID, visible to user */
215 u8 fsid[BTRFS_FSID_SIZE];
216 __le64 bytenr; /* this block number */
219 /* allowed to be different from the btrfs_header from here own down */
226 /* this will help find the new super based on the log root */
227 __le64 log_root_transid;
230 __le64 root_dir_objectid;
234 __le32 __unused_leafsize;
236 __le32 sys_chunk_array_size;
237 __le64 chunk_root_generation;
239 __le64 compat_ro_flags;
240 __le64 incompat_flags;
245 struct btrfs_dev_item dev_item;
247 char label[BTRFS_LABEL_SIZE];
249 __le64 cache_generation;
250 __le64 uuid_tree_generation;
252 /* the UUID written into btree blocks */
253 u8 metadata_uuid[BTRFS_FSID_SIZE];
255 /* future expansion */
257 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
258 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
259 } __attribute__ ((__packed__));
262 * Compat flags that we support. If any incompat flags are set other than the
263 * ones specified below then we will fail to mount
265 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
266 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
267 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
269 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
270 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
271 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
273 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
274 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
276 #define BTRFS_FEATURE_INCOMPAT_SUPP \
277 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
278 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
279 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
280 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
281 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
282 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
283 BTRFS_FEATURE_INCOMPAT_RAID56 | \
284 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
285 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
286 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
287 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
289 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
290 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
291 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
294 * A leaf is full of items. offset and size tell us where to find
295 * the item in the leaf (relative to the start of the data area)
298 struct btrfs_disk_key key;
301 } __attribute__ ((__packed__));
304 * leaves have an item area and a data area:
305 * [item0, item1....itemN] [free space] [dataN...data1, data0]
307 * The data is separate from the items to get the keys closer together
311 struct btrfs_header header;
312 struct btrfs_item items[];
313 } __attribute__ ((__packed__));
316 * all non-leaf blocks are nodes, they hold only keys and pointers to
319 struct btrfs_key_ptr {
320 struct btrfs_disk_key key;
323 } __attribute__ ((__packed__));
326 struct btrfs_header header;
327 struct btrfs_key_ptr ptrs[];
328 } __attribute__ ((__packed__));
331 * btrfs_paths remember the path taken from the root down to the leaf.
332 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
333 * to any other levels that are present.
335 * The slots array records the index of the item or block pointer
336 * used while walking the tree.
338 enum { READA_NONE, READA_BACK, READA_FORWARD };
340 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
341 int slots[BTRFS_MAX_LEVEL];
342 /* if there is real range locking, this locks field will change */
343 u8 locks[BTRFS_MAX_LEVEL];
345 /* keep some upper locks as we walk down */
349 * set by btrfs_split_item, tells search_slot to keep all locks
350 * and to force calls to keep space in the nodes
352 unsigned int search_for_split:1;
353 unsigned int keep_locks:1;
354 unsigned int skip_locking:1;
355 unsigned int leave_spinning:1;
356 unsigned int search_commit_root:1;
357 unsigned int need_commit_sem:1;
358 unsigned int skip_release_on_error:1;
360 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
361 sizeof(struct btrfs_item))
362 struct btrfs_dev_replace {
363 u64 replace_state; /* see #define above */
364 time64_t time_started; /* seconds since 1-Jan-1970 */
365 time64_t time_stopped; /* seconds since 1-Jan-1970 */
366 atomic64_t num_write_errors;
367 atomic64_t num_uncorrectable_read_errors;
370 u64 committed_cursor_left;
371 u64 cursor_left_last_write_of_item;
374 u64 cont_reading_from_srcdev_mode; /* see #define above */
377 int item_needs_writeback;
378 struct btrfs_device *srcdev;
379 struct btrfs_device *tgtdev;
381 struct mutex lock_finishing_cancel_unmount;
382 struct rw_semaphore rwsem;
384 struct btrfs_scrub_progress scrub_progress;
386 struct percpu_counter bio_counter;
387 wait_queue_head_t replace_wait;
390 /* For raid type sysfs entries */
391 struct raid_kobject {
394 struct list_head list;
397 struct btrfs_space_info {
400 u64 total_bytes; /* total bytes in the space,
401 this doesn't take mirrors into account */
402 u64 bytes_used; /* total bytes used,
403 this doesn't take mirrors into account */
404 u64 bytes_pinned; /* total bytes pinned, will be freed when the
405 transaction finishes */
406 u64 bytes_reserved; /* total bytes the allocator has reserved for
407 current allocations */
408 u64 bytes_may_use; /* number of bytes that may be used for
409 delalloc/allocations */
410 u64 bytes_readonly; /* total bytes that are read only */
412 u64 max_extent_size; /* This will hold the maximum extent size of
413 the space info if we had an ENOSPC in the
416 unsigned int full:1; /* indicates that we cannot allocate any more
417 chunks for this space */
418 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
420 unsigned int flush:1; /* set if we are trying to make space */
422 unsigned int force_alloc; /* set if we need to force a chunk
423 alloc for this space */
425 u64 disk_used; /* total bytes used on disk */
426 u64 disk_total; /* total bytes on disk, takes mirrors into
432 * bytes_pinned is kept in line with what is actually pinned, as in
433 * we've called update_block_group and dropped the bytes_used counter
434 * and increased the bytes_pinned counter. However this means that
435 * bytes_pinned does not reflect the bytes that will be pinned once the
436 * delayed refs are flushed, so this counter is inc'ed every time we
437 * call btrfs_free_extent so it is a realtime count of what will be
438 * freed once the transaction is committed. It will be zeroed every
439 * time the transaction commits.
441 struct percpu_counter total_bytes_pinned;
443 struct list_head list;
444 /* Protected by the spinlock 'lock'. */
445 struct list_head ro_bgs;
446 struct list_head priority_tickets;
447 struct list_head tickets;
449 * tickets_id just indicates the next ticket will be handled, so note
450 * it's not stored per ticket.
454 struct rw_semaphore groups_sem;
455 /* for block groups in our same type */
456 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
457 wait_queue_head_t wait;
460 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
464 * Types of block reserves
467 BTRFS_BLOCK_RSV_GLOBAL,
468 BTRFS_BLOCK_RSV_DELALLOC,
469 BTRFS_BLOCK_RSV_TRANS,
470 BTRFS_BLOCK_RSV_CHUNK,
471 BTRFS_BLOCK_RSV_DELOPS,
472 BTRFS_BLOCK_RSV_DELREFS,
473 BTRFS_BLOCK_RSV_EMPTY,
474 BTRFS_BLOCK_RSV_TEMP,
477 struct btrfs_block_rsv {
480 struct btrfs_space_info *space_info;
484 unsigned short failfast;
487 * Qgroup equivalent for @size @reserved
489 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care
490 * about things like csum size nor how many tree blocks it will need to
493 * Qgroup cares more about net change of the extent usage.
495 * So for one newly inserted file extent, in worst case it will cause
496 * leaf split and level increase, nodesize for each file extent is
499 * In short, qgroup_size/reserved is the upper limit of possible needed
500 * qgroup metadata reservation.
503 u64 qgroup_rsv_reserved;
507 * free clusters are used to claim free space in relatively large chunks,
508 * allowing us to do less seeky writes. They are used for all metadata
509 * allocations. In ssd_spread mode they are also used for data allocations.
511 struct btrfs_free_cluster {
513 spinlock_t refill_lock;
516 /* largest extent in this cluster */
519 /* first extent starting offset */
522 /* We did a full search and couldn't create a cluster */
525 struct btrfs_block_group_cache *block_group;
527 * when a cluster is allocated from a block group, we put the
528 * cluster onto a list in the block group so that it can
529 * be freed before the block group is freed.
531 struct list_head block_group_list;
534 enum btrfs_caching_type {
538 BTRFS_CACHE_FINISHED,
542 enum btrfs_disk_cache_state {
549 struct btrfs_caching_control {
550 struct list_head list;
552 wait_queue_head_t wait;
553 struct btrfs_work work;
554 struct btrfs_block_group_cache *block_group;
559 /* Once caching_thread() finds this much free space, it will wake up waiters. */
560 #define CACHING_CTL_WAKE_UP SZ_2M
562 struct btrfs_io_ctl {
566 struct btrfs_fs_info *fs_info;
573 unsigned check_crcs:1;
577 * Tree to record all locked full stripes of a RAID5/6 block group
579 struct btrfs_full_stripe_locks_tree {
584 struct btrfs_block_group_cache {
585 struct btrfs_key key;
586 struct btrfs_block_group_item item;
587 struct btrfs_fs_info *fs_info;
595 u64 cache_generation;
598 * If the free space extent count exceeds this number, convert the block
601 u32 bitmap_high_thresh;
604 * If the free space extent count drops below this number, convert the
605 * block group back to extents.
607 u32 bitmap_low_thresh;
610 * It is just used for the delayed data space allocation because
611 * only the data space allocation and the relative metadata update
612 * can be done cross the transaction.
614 struct rw_semaphore data_rwsem;
616 /* for raid56, this is a full stripe, without parity */
617 unsigned long full_stripe_len;
621 unsigned int has_caching_ctl:1;
622 unsigned int removed:1;
624 int disk_cache_state;
626 /* cache tracking stuff */
628 struct btrfs_caching_control *caching_ctl;
629 u64 last_byte_to_unpin;
631 struct btrfs_space_info *space_info;
633 /* free space cache stuff */
634 struct btrfs_free_space_ctl *free_space_ctl;
636 /* block group cache stuff */
637 struct rb_node cache_node;
639 /* for block groups in the same raid type */
640 struct list_head list;
645 /* List of struct btrfs_free_clusters for this block group.
646 * Today it will only have one thing on it, but that may change
648 struct list_head cluster_list;
650 /* For delayed block group creation or deletion of empty block groups */
651 struct list_head bg_list;
653 /* For read-only block groups */
654 struct list_head ro_list;
658 /* For dirty block groups */
659 struct list_head dirty_list;
660 struct list_head io_list;
662 struct btrfs_io_ctl io_ctl;
665 * Incremented when doing extent allocations and holding a read lock
666 * on the space_info's groups_sem semaphore.
667 * Decremented when an ordered extent that represents an IO against this
668 * block group's range is created (after it's added to its inode's
669 * root's list of ordered extents) or immediately after the allocation
670 * if it's a metadata extent or fallocate extent (for these cases we
671 * don't create ordered extents).
673 atomic_t reservations;
676 * Incremented while holding the spinlock *lock* by a task checking if
677 * it can perform a nocow write (incremented if the value for the *ro*
678 * field is 0). Decremented by such tasks once they create an ordered
679 * extent or before that if some error happens before reaching that step.
680 * This is to prevent races between block group relocation and nocow
681 * writes through direct IO.
683 atomic_t nocow_writers;
685 /* Lock for free space tree operations. */
686 struct mutex free_space_lock;
689 * Does the block group need to be added to the free space tree?
690 * Protected by free_space_lock.
692 int needs_free_space;
694 /* Record locked full stripes for RAID5/6 block group */
695 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
698 /* delayed seq elem */
700 struct list_head list;
704 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
706 #define SEQ_LAST ((u64)-1)
708 enum btrfs_orphan_cleanup_state {
709 ORPHAN_CLEANUP_STARTED = 1,
710 ORPHAN_CLEANUP_DONE = 2,
713 /* used by the raid56 code to lock stripes for read/modify/write */
714 struct btrfs_stripe_hash {
715 struct list_head hash_list;
719 /* used by the raid56 code to lock stripes for read/modify/write */
720 struct btrfs_stripe_hash_table {
721 struct list_head stripe_cache;
722 spinlock_t cache_lock;
724 struct btrfs_stripe_hash table[];
727 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
729 void btrfs_init_async_reclaim_work(struct work_struct *work);
732 struct reloc_control;
734 struct btrfs_fs_devices;
735 struct btrfs_balance_control;
736 struct btrfs_delayed_root;
739 * Block group or device which contains an active swapfile. Used for preventing
740 * unsafe operations while a swapfile is active.
742 * These are sorted on (ptr, inode) (note that a block group or device can
743 * contain more than one swapfile). We compare the pointer values because we
744 * don't actually care what the object is, we just need a quick check whether
745 * the object exists in the rbtree.
747 struct btrfs_swapfile_pin {
752 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
753 * ptr points to a struct btrfs_device.
758 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
762 BTRFS_FS_CLOSING_START,
763 BTRFS_FS_CLOSING_DONE,
764 BTRFS_FS_LOG_RECOVERING,
766 BTRFS_FS_QUOTA_ENABLED,
767 BTRFS_FS_UPDATE_UUID_TREE_GEN,
768 BTRFS_FS_CREATING_FREE_SPACE_TREE,
772 BTRFS_FS_QUOTA_OVERRIDE,
773 /* Used to record internally whether fs has been frozen */
776 * Indicate that a whole-filesystem exclusive operation is running
777 * (device replace, resize, device add/delete, balance)
781 * To info transaction_kthread we need an immediate commit so it
782 * doesn't need to wait for commit_interval
784 BTRFS_FS_NEED_ASYNC_COMMIT,
786 * Indicate that balance has been set up from the ioctl and is in the
787 * main phase. The fs_info::balance_ctl is initialized.
789 BTRFS_FS_BALANCE_RUNNING,
791 /* Indicate that the cleaner thread is awake and doing something. */
792 BTRFS_FS_CLEANER_RUNNING,
795 struct btrfs_fs_info {
796 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
798 struct btrfs_root *extent_root;
799 struct btrfs_root *tree_root;
800 struct btrfs_root *chunk_root;
801 struct btrfs_root *dev_root;
802 struct btrfs_root *fs_root;
803 struct btrfs_root *csum_root;
804 struct btrfs_root *quota_root;
805 struct btrfs_root *uuid_root;
806 struct btrfs_root *free_space_root;
808 /* the log root tree is a directory of all the other log roots */
809 struct btrfs_root *log_root_tree;
811 spinlock_t fs_roots_radix_lock;
812 struct radix_tree_root fs_roots_radix;
814 /* block group cache stuff */
815 spinlock_t block_group_cache_lock;
816 u64 first_logical_byte;
817 struct rb_root block_group_cache_tree;
819 /* keep track of unallocated space */
820 atomic64_t free_chunk_space;
822 struct extent_io_tree freed_extents[2];
823 struct extent_io_tree *pinned_extents;
825 /* logical->physical extent mapping */
826 struct btrfs_mapping_tree mapping_tree;
829 * block reservation for extent, checksum, root tree and
830 * delayed dir index item
832 struct btrfs_block_rsv global_block_rsv;
833 /* block reservation for metadata operations */
834 struct btrfs_block_rsv trans_block_rsv;
835 /* block reservation for chunk tree */
836 struct btrfs_block_rsv chunk_block_rsv;
837 /* block reservation for delayed operations */
838 struct btrfs_block_rsv delayed_block_rsv;
839 /* block reservation for delayed refs */
840 struct btrfs_block_rsv delayed_refs_rsv;
842 struct btrfs_block_rsv empty_block_rsv;
845 u64 last_trans_committed;
846 u64 avg_delayed_ref_runtime;
849 * this is updated to the current trans every time a full commit
850 * is required instead of the faster short fsync log commits
852 u64 last_trans_log_full_commit;
853 unsigned long mount_opt;
855 * Track requests for actions that need to be done during transaction
856 * commit (like for some mount options).
858 unsigned long pending_changes;
859 unsigned long compress_type:4;
860 unsigned int compress_level;
863 * It is a suggestive number, the read side is safe even it gets a
864 * wrong number because we will write out the data into a regular
865 * extent. The write side(mount/remount) is under ->s_umount lock,
866 * so it is also safe.
870 struct btrfs_transaction *running_transaction;
871 wait_queue_head_t transaction_throttle;
872 wait_queue_head_t transaction_wait;
873 wait_queue_head_t transaction_blocked_wait;
874 wait_queue_head_t async_submit_wait;
877 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
878 * when they are updated.
880 * Because we do not clear the flags for ever, so we needn't use
881 * the lock on the read side.
883 * We also needn't use the lock when we mount the fs, because
884 * there is no other task which will update the flag.
886 spinlock_t super_lock;
887 struct btrfs_super_block *super_copy;
888 struct btrfs_super_block *super_for_commit;
889 struct super_block *sb;
890 struct inode *btree_inode;
891 struct mutex tree_log_mutex;
892 struct mutex transaction_kthread_mutex;
893 struct mutex cleaner_mutex;
894 struct mutex chunk_mutex;
897 * this is taken to make sure we don't set block groups ro after
898 * the free space cache has been allocated on them
900 struct mutex ro_block_group_mutex;
902 /* this is used during read/modify/write to make sure
903 * no two ios are trying to mod the same stripe at the same
906 struct btrfs_stripe_hash_table *stripe_hash_table;
909 * this protects the ordered operations list only while we are
910 * processing all of the entries on it. This way we make
911 * sure the commit code doesn't find the list temporarily empty
912 * because another function happens to be doing non-waiting preflush
913 * before jumping into the main commit.
915 struct mutex ordered_operations_mutex;
917 struct rw_semaphore commit_root_sem;
919 struct rw_semaphore cleanup_work_sem;
921 struct rw_semaphore subvol_sem;
922 struct srcu_struct subvol_srcu;
924 spinlock_t trans_lock;
926 * the reloc mutex goes with the trans lock, it is taken
927 * during commit to protect us from the relocation code
929 struct mutex reloc_mutex;
931 struct list_head trans_list;
932 struct list_head dead_roots;
933 struct list_head caching_block_groups;
935 spinlock_t delayed_iput_lock;
936 struct list_head delayed_iputs;
937 atomic_t nr_delayed_iputs;
938 wait_queue_head_t delayed_iputs_wait;
940 /* this protects tree_mod_seq_list */
941 spinlock_t tree_mod_seq_lock;
942 atomic64_t tree_mod_seq;
943 struct list_head tree_mod_seq_list;
945 /* this protects tree_mod_log */
946 rwlock_t tree_mod_log_lock;
947 struct rb_root tree_mod_log;
949 atomic_t async_delalloc_pages;
952 * this is used to protect the following list -- ordered_roots.
954 spinlock_t ordered_root_lock;
957 * all fs/file tree roots in which there are data=ordered extents
958 * pending writeback are added into this list.
960 * these can span multiple transactions and basically include
961 * every dirty data page that isn't from nodatacow
963 struct list_head ordered_roots;
965 struct mutex delalloc_root_mutex;
966 spinlock_t delalloc_root_lock;
967 /* all fs/file tree roots that have delalloc inodes. */
968 struct list_head delalloc_roots;
971 * there is a pool of worker threads for checksumming during writes
972 * and a pool for checksumming after reads. This is because readers
973 * can run with FS locks held, and the writers may be waiting for
974 * those locks. We don't want ordering in the pending list to cause
975 * deadlocks, and so the two are serviced separately.
977 * A third pool does submit_bio to avoid deadlocking with the other
980 struct btrfs_workqueue *workers;
981 struct btrfs_workqueue *delalloc_workers;
982 struct btrfs_workqueue *flush_workers;
983 struct btrfs_workqueue *endio_workers;
984 struct btrfs_workqueue *endio_meta_workers;
985 struct btrfs_workqueue *endio_raid56_workers;
986 struct btrfs_workqueue *endio_repair_workers;
987 struct btrfs_workqueue *rmw_workers;
988 struct btrfs_workqueue *endio_meta_write_workers;
989 struct btrfs_workqueue *endio_write_workers;
990 struct btrfs_workqueue *endio_freespace_worker;
991 struct btrfs_workqueue *submit_workers;
992 struct btrfs_workqueue *caching_workers;
993 struct btrfs_workqueue *readahead_workers;
996 * fixup workers take dirty pages that didn't properly go through
997 * the cow mechanism and make them safe to write. It happens
998 * for the sys_munmap function call path
1000 struct btrfs_workqueue *fixup_workers;
1001 struct btrfs_workqueue *delayed_workers;
1003 /* the extent workers do delayed refs on the extent allocation tree */
1004 struct btrfs_workqueue *extent_workers;
1005 struct task_struct *transaction_kthread;
1006 struct task_struct *cleaner_kthread;
1007 u32 thread_pool_size;
1009 struct kobject *space_info_kobj;
1010 struct list_head pending_raid_kobjs;
1011 spinlock_t pending_raid_kobjs_lock; /* uncontended */
1015 /* used to keep from writing metadata until there is a nice batch */
1016 struct percpu_counter dirty_metadata_bytes;
1017 struct percpu_counter delalloc_bytes;
1018 s32 dirty_metadata_batch;
1021 struct list_head dirty_cowonly_roots;
1023 struct btrfs_fs_devices *fs_devices;
1026 * The space_info list is effectively read only after initial
1027 * setup. It is populated at mount time and cleaned up after
1028 * all block groups are removed. RCU is used to protect it.
1030 struct list_head space_info;
1032 struct btrfs_space_info *data_sinfo;
1034 struct reloc_control *reloc_ctl;
1036 /* data_alloc_cluster is only used in ssd_spread mode */
1037 struct btrfs_free_cluster data_alloc_cluster;
1039 /* all metadata allocations go through this cluster */
1040 struct btrfs_free_cluster meta_alloc_cluster;
1042 /* auto defrag inodes go here */
1043 spinlock_t defrag_inodes_lock;
1044 struct rb_root defrag_inodes;
1045 atomic_t defrag_running;
1047 /* Used to protect avail_{data, metadata, system}_alloc_bits */
1048 seqlock_t profiles_lock;
1050 * these three are in extended format (availability of single
1051 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
1052 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
1054 u64 avail_data_alloc_bits;
1055 u64 avail_metadata_alloc_bits;
1056 u64 avail_system_alloc_bits;
1058 /* restriper state */
1059 spinlock_t balance_lock;
1060 struct mutex balance_mutex;
1061 atomic_t balance_pause_req;
1062 atomic_t balance_cancel_req;
1063 struct btrfs_balance_control *balance_ctl;
1064 wait_queue_head_t balance_wait_q;
1066 u32 data_chunk_allocations;
1071 /* private scrub information */
1072 struct mutex scrub_lock;
1073 atomic_t scrubs_running;
1074 atomic_t scrub_pause_req;
1075 atomic_t scrubs_paused;
1076 atomic_t scrub_cancel_req;
1077 wait_queue_head_t scrub_pause_wait;
1079 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
1082 refcount_t scrub_workers_refcnt;
1083 struct btrfs_workqueue *scrub_workers;
1084 struct btrfs_workqueue *scrub_wr_completion_workers;
1085 struct btrfs_workqueue *scrub_parity_workers;
1087 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1088 u32 check_integrity_print_mask;
1090 /* is qgroup tracking in a consistent state? */
1093 /* holds configuration and tracking. Protected by qgroup_lock */
1094 struct rb_root qgroup_tree;
1095 spinlock_t qgroup_lock;
1098 * used to avoid frequently calling ulist_alloc()/ulist_free()
1099 * when doing qgroup accounting, it must be protected by qgroup_lock.
1101 struct ulist *qgroup_ulist;
1103 /* protect user change for quota operations */
1104 struct mutex qgroup_ioctl_lock;
1106 /* list of dirty qgroups to be written at next commit */
1107 struct list_head dirty_qgroups;
1109 /* used by qgroup for an efficient tree traversal */
1112 /* qgroup rescan items */
1113 struct mutex qgroup_rescan_lock; /* protects the progress item */
1114 struct btrfs_key qgroup_rescan_progress;
1115 struct btrfs_workqueue *qgroup_rescan_workers;
1116 struct completion qgroup_rescan_completion;
1117 struct btrfs_work qgroup_rescan_work;
1118 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1120 /* filesystem state */
1121 unsigned long fs_state;
1123 struct btrfs_delayed_root *delayed_root;
1125 /* readahead tree */
1126 spinlock_t reada_lock;
1127 struct radix_tree_root reada_tree;
1129 /* readahead works cnt */
1130 atomic_t reada_works_cnt;
1132 /* Extent buffer radix tree */
1133 spinlock_t buffer_lock;
1134 struct radix_tree_root buffer_radix;
1136 /* next backup root to be overwritten */
1137 int backup_root_index;
1139 /* device replace state */
1140 struct btrfs_dev_replace dev_replace;
1142 struct semaphore uuid_tree_rescan_sem;
1144 /* Used to reclaim the metadata space in the background. */
1145 struct work_struct async_reclaim_work;
1147 spinlock_t unused_bgs_lock;
1148 struct list_head unused_bgs;
1149 struct mutex unused_bg_unpin_mutex;
1150 struct mutex delete_unused_bgs_mutex;
1152 /* Cached block sizes */
1157 /* Block groups and devices containing active swapfiles. */
1158 spinlock_t swapfile_pins_lock;
1159 struct rb_root swapfile_pins;
1161 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1162 spinlock_t ref_verify_lock;
1163 struct rb_root block_tree;
1167 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1169 return sb->s_fs_info;
1172 struct btrfs_subvolume_writers {
1173 struct percpu_counter counter;
1174 wait_queue_head_t wait;
1178 * The state of btrfs root
1182 * btrfs_record_root_in_trans is a multi-step process, and it can race
1183 * with the balancing code. But the race is very small, and only the
1184 * first time the root is added to each transaction. So IN_TRANS_SETUP
1185 * is used to tell us when more checks are required
1187 BTRFS_ROOT_IN_TRANS_SETUP,
1188 BTRFS_ROOT_REF_COWS,
1189 BTRFS_ROOT_TRACK_DIRTY,
1190 BTRFS_ROOT_IN_RADIX,
1191 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1192 BTRFS_ROOT_DEFRAG_RUNNING,
1193 BTRFS_ROOT_FORCE_COW,
1194 BTRFS_ROOT_MULTI_LOG_TASKS,
1196 BTRFS_ROOT_DELETING,
1199 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1201 * Set for the subvolume tree owning the reloc tree.
1203 BTRFS_ROOT_DEAD_RELOC_TREE,
1204 /* Mark dead root stored on device whose cleanup needs to be resumed */
1205 BTRFS_ROOT_DEAD_TREE,
1209 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1210 * code. For detail check comment in fs/btrfs/qgroup.c.
1212 struct btrfs_qgroup_swapped_blocks {
1214 /* RM_EMPTY_ROOT() of above blocks[] */
1216 struct rb_root blocks[BTRFS_MAX_LEVEL];
1220 * in ram representation of the tree. extent_root is used for all allocations
1221 * and for the extent tree extent_root root.
1224 struct extent_buffer *node;
1226 struct extent_buffer *commit_root;
1227 struct btrfs_root *log_root;
1228 struct btrfs_root *reloc_root;
1230 unsigned long state;
1231 struct btrfs_root_item root_item;
1232 struct btrfs_key root_key;
1233 struct btrfs_fs_info *fs_info;
1234 struct extent_io_tree dirty_log_pages;
1236 struct mutex objectid_mutex;
1238 spinlock_t accounting_lock;
1239 struct btrfs_block_rsv *block_rsv;
1241 /* free ino cache stuff */
1242 struct btrfs_free_space_ctl *free_ino_ctl;
1243 enum btrfs_caching_type ino_cache_state;
1244 spinlock_t ino_cache_lock;
1245 wait_queue_head_t ino_cache_wait;
1246 struct btrfs_free_space_ctl *free_ino_pinned;
1247 u64 ino_cache_progress;
1248 struct inode *ino_cache_inode;
1250 struct mutex log_mutex;
1251 wait_queue_head_t log_writer_wait;
1252 wait_queue_head_t log_commit_wait[2];
1253 struct list_head log_ctxs[2];
1254 atomic_t log_writers;
1255 atomic_t log_commit[2];
1258 /* No matter the commit succeeds or not*/
1259 int log_transid_committed;
1260 /* Just be updated when the commit succeeds. */
1261 int last_log_commit;
1262 pid_t log_start_pid;
1268 u64 highest_objectid;
1270 u64 defrag_trans_start;
1271 struct btrfs_key defrag_progress;
1272 struct btrfs_key defrag_max;
1274 /* the dirty list is only used by non-reference counted roots */
1275 struct list_head dirty_list;
1277 struct list_head root_list;
1279 spinlock_t log_extents_lock[2];
1280 struct list_head logged_list[2];
1282 int orphan_cleanup_state;
1284 spinlock_t inode_lock;
1285 /* red-black tree that keeps track of in-memory inodes */
1286 struct rb_root inode_tree;
1289 * radix tree that keeps track of delayed nodes of every inode,
1290 * protected by inode_lock
1292 struct radix_tree_root delayed_nodes_tree;
1294 * right now this just gets used so that a root has its own devid
1295 * for stat. It may be used for more later
1299 spinlock_t root_item_lock;
1302 struct mutex delalloc_mutex;
1303 spinlock_t delalloc_lock;
1305 * all of the inodes that have delalloc bytes. It is possible for
1306 * this list to be empty even when there is still dirty data=ordered
1307 * extents waiting to finish IO.
1309 struct list_head delalloc_inodes;
1310 struct list_head delalloc_root;
1311 u64 nr_delalloc_inodes;
1313 struct mutex ordered_extent_mutex;
1315 * this is used by the balancing code to wait for all the pending
1318 spinlock_t ordered_extent_lock;
1321 * all of the data=ordered extents pending writeback
1322 * these can span multiple transactions and basically include
1323 * every dirty data page that isn't from nodatacow
1325 struct list_head ordered_extents;
1326 struct list_head ordered_root;
1327 u64 nr_ordered_extents;
1330 * Not empty if this subvolume root has gone through tree block swap
1333 * Will be used by reloc_control::dirty_subvol_roots.
1335 struct list_head reloc_dirty_list;
1338 * Number of currently running SEND ioctls to prevent
1339 * manipulation with the read-only status via SUBVOL_SETFLAGS
1341 int send_in_progress;
1342 struct btrfs_subvolume_writers *subv_writers;
1343 atomic_t will_be_snapshotted;
1344 atomic_t snapshot_force_cow;
1346 /* For qgroup metadata reserved space */
1347 spinlock_t qgroup_meta_rsv_lock;
1348 u64 qgroup_meta_rsv_pertrans;
1349 u64 qgroup_meta_rsv_prealloc;
1351 /* Number of active swapfiles */
1352 atomic_t nr_swapfiles;
1354 /* Record pairs of swapped blocks for qgroup */
1355 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1357 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1362 struct btrfs_file_private {
1366 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1368 return btrfs_sb(inode->i_sb)->sectorsize;
1371 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1374 return info->nodesize - sizeof(struct btrfs_header);
1377 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1379 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1381 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1384 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1386 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1389 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1390 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1391 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1393 return BTRFS_MAX_ITEM_SIZE(info) -
1394 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1397 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1399 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1403 * Flags for mount options.
1405 * Note: don't forget to add new options to btrfs_show_options()
1407 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1408 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1409 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1410 #define BTRFS_MOUNT_SSD (1 << 3)
1411 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1412 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1413 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1414 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1415 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1416 #define BTRFS_MOUNT_NOSSD (1 << 9)
1417 #define BTRFS_MOUNT_DISCARD (1 << 10)
1418 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1419 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1420 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1421 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1422 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1423 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1424 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1425 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1426 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1427 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1428 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1429 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1430 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1431 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1432 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1433 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1434 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1435 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1437 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1438 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1440 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1441 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1442 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1443 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1446 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1448 if (!btrfs_test_opt(fs_info, opt)) \
1449 btrfs_info(fs_info, fmt, ##args); \
1450 btrfs_set_opt(fs_info->mount_opt, opt); \
1453 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1455 if (btrfs_test_opt(fs_info, opt)) \
1456 btrfs_info(fs_info, fmt, ##args); \
1457 btrfs_clear_opt(fs_info->mount_opt, opt); \
1460 #ifdef CONFIG_BTRFS_DEBUG
1462 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1464 struct btrfs_fs_info *fs_info = block_group->fs_info;
1466 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1467 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1468 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1469 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1474 * Requests for changes that need to be done during transaction commit.
1476 * Internal mount options that are used for special handling of the real
1477 * mount options (eg. cannot be set during remount and have to be set during
1478 * transaction commit)
1481 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1482 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1483 #define BTRFS_PENDING_COMMIT (2)
1485 #define btrfs_test_pending(info, opt) \
1486 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1487 #define btrfs_set_pending(info, opt) \
1488 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1489 #define btrfs_clear_pending(info, opt) \
1490 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1493 * Helpers for setting pending mount option changes.
1495 * Expects corresponding macros
1496 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1498 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1500 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1501 btrfs_info((info), fmt, ##args); \
1502 btrfs_set_pending((info), SET_##opt); \
1503 btrfs_clear_pending((info), CLEAR_##opt); \
1507 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1509 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1510 btrfs_info((info), fmt, ##args); \
1511 btrfs_set_pending((info), CLEAR_##opt); \
1512 btrfs_clear_pending((info), SET_##opt); \
1519 #define BTRFS_INODE_NODATASUM (1 << 0)
1520 #define BTRFS_INODE_NODATACOW (1 << 1)
1521 #define BTRFS_INODE_READONLY (1 << 2)
1522 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1523 #define BTRFS_INODE_PREALLOC (1 << 4)
1524 #define BTRFS_INODE_SYNC (1 << 5)
1525 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1526 #define BTRFS_INODE_APPEND (1 << 7)
1527 #define BTRFS_INODE_NODUMP (1 << 8)
1528 #define BTRFS_INODE_NOATIME (1 << 9)
1529 #define BTRFS_INODE_DIRSYNC (1 << 10)
1530 #define BTRFS_INODE_COMPRESS (1 << 11)
1532 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1534 #define BTRFS_INODE_FLAG_MASK \
1535 (BTRFS_INODE_NODATASUM | \
1536 BTRFS_INODE_NODATACOW | \
1537 BTRFS_INODE_READONLY | \
1538 BTRFS_INODE_NOCOMPRESS | \
1539 BTRFS_INODE_PREALLOC | \
1540 BTRFS_INODE_SYNC | \
1541 BTRFS_INODE_IMMUTABLE | \
1542 BTRFS_INODE_APPEND | \
1543 BTRFS_INODE_NODUMP | \
1544 BTRFS_INODE_NOATIME | \
1545 BTRFS_INODE_DIRSYNC | \
1546 BTRFS_INODE_COMPRESS | \
1547 BTRFS_INODE_ROOT_ITEM_INIT)
1549 struct btrfs_map_token {
1550 const struct extent_buffer *eb;
1552 unsigned long offset;
1555 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1556 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1558 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1560 token->kaddr = NULL;
1563 /* some macros to generate set/get functions for the struct fields. This
1564 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1567 #define le8_to_cpu(v) (v)
1568 #define cpu_to_le8(v) (v)
1571 #define read_eb_member(eb, ptr, type, member, result) (\
1572 read_extent_buffer(eb, (char *)(result), \
1573 ((unsigned long)(ptr)) + \
1574 offsetof(type, member), \
1575 sizeof(((type *)0)->member)))
1577 #define write_eb_member(eb, ptr, type, member, result) (\
1578 write_extent_buffer(eb, (char *)(result), \
1579 ((unsigned long)(ptr)) + \
1580 offsetof(type, member), \
1581 sizeof(((type *)0)->member)))
1583 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1584 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1585 const void *ptr, unsigned long off, \
1586 struct btrfs_map_token *token); \
1587 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1588 unsigned long off, u##bits val, \
1589 struct btrfs_map_token *token); \
1590 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1592 unsigned long off) \
1594 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1596 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1597 unsigned long off, u##bits val) \
1599 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1602 DECLARE_BTRFS_SETGET_BITS(8)
1603 DECLARE_BTRFS_SETGET_BITS(16)
1604 DECLARE_BTRFS_SETGET_BITS(32)
1605 DECLARE_BTRFS_SETGET_BITS(64)
1607 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1608 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1611 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1612 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1614 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1617 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1618 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1620 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1622 struct btrfs_map_token *token) \
1624 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1625 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1627 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1628 type *s, u##bits val, \
1629 struct btrfs_map_token *token) \
1631 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1632 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1635 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1636 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1638 const type *p = page_address(eb->pages[0]); \
1639 u##bits res = le##bits##_to_cpu(p->member); \
1642 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1645 type *p = page_address(eb->pages[0]); \
1646 p->member = cpu_to_le##bits(val); \
1649 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1650 static inline u##bits btrfs_##name(const type *s) \
1652 return le##bits##_to_cpu(s->member); \
1654 static inline void btrfs_set_##name(type *s, u##bits val) \
1656 s->member = cpu_to_le##bits(val); \
1660 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1661 struct btrfs_dev_item *s)
1663 BUILD_BUG_ON(sizeof(u64) !=
1664 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1665 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1668 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1669 struct btrfs_dev_item *s,
1672 BUILD_BUG_ON(sizeof(u64) !=
1673 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1674 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1675 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1679 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1680 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1681 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1682 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1683 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1685 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1686 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1687 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1688 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1689 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1690 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1692 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1693 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1695 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1697 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1699 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1701 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1703 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1704 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1706 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1708 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1710 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1713 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1715 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1718 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1720 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1723 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1724 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1725 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1726 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1727 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1728 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1729 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1730 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1731 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1732 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1733 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1735 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1737 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1740 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1741 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1742 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1744 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1746 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1748 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1750 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1751 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1753 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1755 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1756 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1758 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1761 unsigned long offset = (unsigned long)c;
1762 offset += offsetof(struct btrfs_chunk, stripe);
1763 offset += nr * sizeof(struct btrfs_stripe);
1764 return (struct btrfs_stripe *)offset;
1767 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1769 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1772 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1773 struct btrfs_chunk *c, int nr)
1775 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1778 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1779 struct btrfs_chunk *c, int nr)
1781 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1784 /* struct btrfs_block_group_item */
1785 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1787 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1789 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1790 struct btrfs_block_group_item, chunk_objectid, 64);
1792 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1793 struct btrfs_block_group_item, chunk_objectid, 64);
1794 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1795 struct btrfs_block_group_item, flags, 64);
1796 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1797 struct btrfs_block_group_item, flags, 64);
1799 /* struct btrfs_free_space_info */
1800 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1802 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1804 /* struct btrfs_inode_ref */
1805 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1806 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1808 /* struct btrfs_inode_extref */
1809 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1810 parent_objectid, 64);
1811 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1813 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1815 /* struct btrfs_inode_item */
1816 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1817 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1818 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1819 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1820 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1821 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1822 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1823 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1824 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1825 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1826 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1827 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1828 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1830 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1832 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1834 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1835 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1837 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1839 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1840 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1841 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1842 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1843 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1844 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1845 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1846 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1847 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1848 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1850 /* struct btrfs_dev_extent */
1851 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1853 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1854 chunk_objectid, 64);
1855 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1857 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1859 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1861 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1862 return (unsigned long)dev + ptr;
1865 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1866 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1868 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1870 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1873 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1875 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1876 struct btrfs_tree_block_info *item,
1877 struct btrfs_disk_key *key)
1879 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1882 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1883 struct btrfs_tree_block_info *item,
1884 struct btrfs_disk_key *key)
1886 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1889 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1891 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1893 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1895 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1898 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1901 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1903 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1906 static inline u32 btrfs_extent_inline_ref_size(int type)
1908 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1909 type == BTRFS_SHARED_BLOCK_REF_KEY)
1910 return sizeof(struct btrfs_extent_inline_ref);
1911 if (type == BTRFS_SHARED_DATA_REF_KEY)
1912 return sizeof(struct btrfs_shared_data_ref) +
1913 sizeof(struct btrfs_extent_inline_ref);
1914 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1915 return sizeof(struct btrfs_extent_data_ref) +
1916 offsetof(struct btrfs_extent_inline_ref, offset);
1920 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1921 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1923 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1924 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1926 /* struct btrfs_node */
1927 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1928 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1929 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1931 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1934 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1937 ptr = offsetof(struct btrfs_node, ptrs) +
1938 sizeof(struct btrfs_key_ptr) * nr;
1939 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1942 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1946 ptr = offsetof(struct btrfs_node, ptrs) +
1947 sizeof(struct btrfs_key_ptr) * nr;
1948 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1951 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1954 ptr = offsetof(struct btrfs_node, ptrs) +
1955 sizeof(struct btrfs_key_ptr) * nr;
1956 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1959 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1963 ptr = offsetof(struct btrfs_node, ptrs) +
1964 sizeof(struct btrfs_key_ptr) * nr;
1965 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1968 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1970 return offsetof(struct btrfs_node, ptrs) +
1971 sizeof(struct btrfs_key_ptr) * nr;
1974 void btrfs_node_key(const struct extent_buffer *eb,
1975 struct btrfs_disk_key *disk_key, int nr);
1977 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1978 struct btrfs_disk_key *disk_key, int nr)
1981 ptr = btrfs_node_key_ptr_offset(nr);
1982 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1983 struct btrfs_key_ptr, key, disk_key);
1986 /* struct btrfs_item */
1987 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1988 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1989 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1990 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1992 static inline unsigned long btrfs_item_nr_offset(int nr)
1994 return offsetof(struct btrfs_leaf, items) +
1995 sizeof(struct btrfs_item) * nr;
1998 static inline struct btrfs_item *btrfs_item_nr(int nr)
2000 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
2003 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
2004 struct btrfs_item *item)
2006 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
2009 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
2011 return btrfs_item_end(eb, btrfs_item_nr(nr));
2014 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
2016 return btrfs_item_offset(eb, btrfs_item_nr(nr));
2019 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
2021 return btrfs_item_size(eb, btrfs_item_nr(nr));
2024 static inline void btrfs_item_key(const struct extent_buffer *eb,
2025 struct btrfs_disk_key *disk_key, int nr)
2027 struct btrfs_item *item = btrfs_item_nr(nr);
2028 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2031 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2032 struct btrfs_disk_key *disk_key, int nr)
2034 struct btrfs_item *item = btrfs_item_nr(nr);
2035 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2038 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2041 * struct btrfs_root_ref
2043 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2044 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2045 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2047 /* struct btrfs_dir_item */
2048 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2049 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2050 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2051 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2052 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2053 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2055 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2057 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2060 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
2061 const struct btrfs_dir_item *item,
2062 struct btrfs_disk_key *key)
2064 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2067 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2068 struct btrfs_dir_item *item,
2069 const struct btrfs_disk_key *key)
2071 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2074 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2076 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2078 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2081 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2082 const struct btrfs_free_space_header *h,
2083 struct btrfs_disk_key *key)
2085 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2088 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2089 struct btrfs_free_space_header *h,
2090 const struct btrfs_disk_key *key)
2092 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2095 /* struct btrfs_disk_key */
2096 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2098 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2099 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2101 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2102 const struct btrfs_disk_key *disk)
2104 cpu->offset = le64_to_cpu(disk->offset);
2105 cpu->type = disk->type;
2106 cpu->objectid = le64_to_cpu(disk->objectid);
2109 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2110 const struct btrfs_key *cpu)
2112 disk->offset = cpu_to_le64(cpu->offset);
2113 disk->type = cpu->type;
2114 disk->objectid = cpu_to_le64(cpu->objectid);
2117 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2118 struct btrfs_key *key, int nr)
2120 struct btrfs_disk_key disk_key;
2121 btrfs_node_key(eb, &disk_key, nr);
2122 btrfs_disk_key_to_cpu(key, &disk_key);
2125 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2126 struct btrfs_key *key, int nr)
2128 struct btrfs_disk_key disk_key;
2129 btrfs_item_key(eb, &disk_key, nr);
2130 btrfs_disk_key_to_cpu(key, &disk_key);
2133 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2134 const struct btrfs_dir_item *item,
2135 struct btrfs_key *key)
2137 struct btrfs_disk_key disk_key;
2138 btrfs_dir_item_key(eb, item, &disk_key);
2139 btrfs_disk_key_to_cpu(key, &disk_key);
2142 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2147 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2152 /* struct btrfs_header */
2153 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2154 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2156 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2157 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2158 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2159 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2160 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2162 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2163 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2165 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2167 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2169 return (btrfs_header_flags(eb) & flag) == flag;
2172 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2174 u64 flags = btrfs_header_flags(eb);
2175 btrfs_set_header_flags(eb, flags | flag);
2178 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2180 u64 flags = btrfs_header_flags(eb);
2181 btrfs_set_header_flags(eb, flags & ~flag);
2184 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2186 u64 flags = btrfs_header_flags(eb);
2187 return flags >> BTRFS_BACKREF_REV_SHIFT;
2190 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2193 u64 flags = btrfs_header_flags(eb);
2194 flags &= ~BTRFS_BACKREF_REV_MASK;
2195 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2196 btrfs_set_header_flags(eb, flags);
2199 static inline unsigned long btrfs_header_fsid(void)
2201 return offsetof(struct btrfs_header, fsid);
2204 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2206 return offsetof(struct btrfs_header, chunk_tree_uuid);
2209 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2211 return btrfs_header_level(eb) == 0;
2214 /* struct btrfs_root_item */
2215 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2217 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2218 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2219 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2221 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2223 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2224 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2225 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2226 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2227 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2228 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2229 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2230 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2232 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2234 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2236 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2238 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2240 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2243 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2245 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2248 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2250 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2253 /* struct btrfs_root_backup */
2254 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2256 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2258 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2259 tree_root_level, 8);
2261 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2263 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2264 chunk_root_gen, 64);
2265 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2266 chunk_root_level, 8);
2268 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2270 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2271 extent_root_gen, 64);
2272 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2273 extent_root_level, 8);
2275 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2277 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2279 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2282 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2284 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2286 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2289 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2291 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2293 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2294 csum_root_level, 8);
2295 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2297 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2299 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2302 /* struct btrfs_balance_item */
2303 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2305 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2306 const struct btrfs_balance_item *bi,
2307 struct btrfs_disk_balance_args *ba)
2309 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2312 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2313 struct btrfs_balance_item *bi,
2314 const struct btrfs_disk_balance_args *ba)
2316 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2319 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2320 const struct btrfs_balance_item *bi,
2321 struct btrfs_disk_balance_args *ba)
2323 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2326 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2327 struct btrfs_balance_item *bi,
2328 const struct btrfs_disk_balance_args *ba)
2330 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2333 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2334 const struct btrfs_balance_item *bi,
2335 struct btrfs_disk_balance_args *ba)
2337 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2340 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2341 struct btrfs_balance_item *bi,
2342 const struct btrfs_disk_balance_args *ba)
2344 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2348 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2349 const struct btrfs_disk_balance_args *disk)
2351 memset(cpu, 0, sizeof(*cpu));
2353 cpu->profiles = le64_to_cpu(disk->profiles);
2354 cpu->usage = le64_to_cpu(disk->usage);
2355 cpu->devid = le64_to_cpu(disk->devid);
2356 cpu->pstart = le64_to_cpu(disk->pstart);
2357 cpu->pend = le64_to_cpu(disk->pend);
2358 cpu->vstart = le64_to_cpu(disk->vstart);
2359 cpu->vend = le64_to_cpu(disk->vend);
2360 cpu->target = le64_to_cpu(disk->target);
2361 cpu->flags = le64_to_cpu(disk->flags);
2362 cpu->limit = le64_to_cpu(disk->limit);
2363 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2364 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2368 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2369 const struct btrfs_balance_args *cpu)
2371 memset(disk, 0, sizeof(*disk));
2373 disk->profiles = cpu_to_le64(cpu->profiles);
2374 disk->usage = cpu_to_le64(cpu->usage);
2375 disk->devid = cpu_to_le64(cpu->devid);
2376 disk->pstart = cpu_to_le64(cpu->pstart);
2377 disk->pend = cpu_to_le64(cpu->pend);
2378 disk->vstart = cpu_to_le64(cpu->vstart);
2379 disk->vend = cpu_to_le64(cpu->vend);
2380 disk->target = cpu_to_le64(cpu->target);
2381 disk->flags = cpu_to_le64(cpu->flags);
2382 disk->limit = cpu_to_le64(cpu->limit);
2383 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2384 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2387 /* struct btrfs_super_block */
2388 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2389 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2390 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2392 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2393 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2394 struct btrfs_super_block, sys_chunk_array_size, 32);
2395 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2396 struct btrfs_super_block, chunk_root_generation, 64);
2397 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2399 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2401 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2402 chunk_root_level, 8);
2403 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2405 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2406 log_root_transid, 64);
2407 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2409 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2411 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2413 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2415 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2417 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2419 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2420 root_dir_objectid, 64);
2421 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2423 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2425 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2426 compat_ro_flags, 64);
2427 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2428 incompat_flags, 64);
2429 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2431 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2432 cache_generation, 64);
2433 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2434 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2435 uuid_tree_generation, 64);
2437 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2439 u16 t = btrfs_super_csum_type(s);
2441 * csum type is validated at mount time
2443 return btrfs_csum_sizes[t];
2448 * The leaf data grows from end-to-front in the node.
2449 * this returns the address of the start of the last item,
2450 * which is the stop of the leaf data stack
2452 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2454 u32 nr = btrfs_header_nritems(leaf);
2457 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2458 return btrfs_item_offset_nr(leaf, nr - 1);
2461 /* struct btrfs_file_extent_item */
2462 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2463 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2464 struct btrfs_file_extent_item, disk_bytenr, 64);
2465 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2466 struct btrfs_file_extent_item, offset, 64);
2467 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2468 struct btrfs_file_extent_item, generation, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2470 struct btrfs_file_extent_item, num_bytes, 64);
2471 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2472 struct btrfs_file_extent_item, disk_num_bytes, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2474 struct btrfs_file_extent_item, compression, 8);
2476 static inline unsigned long
2477 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2479 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2482 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2484 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2487 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2489 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2491 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2492 disk_num_bytes, 64);
2493 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2495 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2497 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2499 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2501 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2503 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2504 other_encoding, 16);
2507 * this returns the number of bytes used by the item on disk, minus the
2508 * size of any extent headers. If a file is compressed on disk, this is
2509 * the compressed size
2511 static inline u32 btrfs_file_extent_inline_item_len(
2512 const struct extent_buffer *eb,
2513 struct btrfs_item *e)
2515 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2518 /* btrfs_dev_stats_item */
2519 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2520 const struct btrfs_dev_stats_item *ptr,
2525 read_extent_buffer(eb, &val,
2526 offsetof(struct btrfs_dev_stats_item, values) +
2527 ((unsigned long)ptr) + (index * sizeof(u64)),
2532 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2533 struct btrfs_dev_stats_item *ptr,
2536 write_extent_buffer(eb, &val,
2537 offsetof(struct btrfs_dev_stats_item, values) +
2538 ((unsigned long)ptr) + (index * sizeof(u64)),
2542 /* btrfs_qgroup_status_item */
2543 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2545 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2547 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2549 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2552 /* btrfs_qgroup_info_item */
2553 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2555 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2556 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2558 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2559 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2562 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2563 struct btrfs_qgroup_info_item, generation, 64);
2564 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2566 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2567 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2568 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2570 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2571 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2573 /* btrfs_qgroup_limit_item */
2574 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2576 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2578 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2580 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2582 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2585 /* btrfs_dev_replace_item */
2586 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2587 struct btrfs_dev_replace_item, src_devid, 64);
2588 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2589 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2591 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2593 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2595 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2597 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2598 num_write_errors, 64);
2599 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2600 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2602 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2604 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2607 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2608 struct btrfs_dev_replace_item, src_devid, 64);
2609 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2610 struct btrfs_dev_replace_item,
2611 cont_reading_from_srcdev_mode, 64);
2612 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2613 struct btrfs_dev_replace_item, replace_state, 64);
2614 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2615 struct btrfs_dev_replace_item, time_started, 64);
2616 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2617 struct btrfs_dev_replace_item, time_stopped, 64);
2618 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2619 struct btrfs_dev_replace_item, num_write_errors, 64);
2620 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2621 struct btrfs_dev_replace_item,
2622 num_uncorrectable_read_errors, 64);
2623 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2624 struct btrfs_dev_replace_item, cursor_left, 64);
2625 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2626 struct btrfs_dev_replace_item, cursor_right, 64);
2628 /* helper function to cast into the data area of the leaf. */
2629 #define btrfs_item_ptr(leaf, slot, type) \
2630 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2631 btrfs_item_offset_nr(leaf, slot)))
2633 #define btrfs_item_ptr_offset(leaf, slot) \
2634 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2635 btrfs_item_offset_nr(leaf, slot)))
2637 static inline u64 btrfs_name_hash(const char *name, int len)
2639 return crc32c((u32)~1, name, len);
2643 * Figure the key offset of an extended inode ref
2645 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2648 return (u64) crc32c(parent_objectid, name, len);
2651 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2653 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2654 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2657 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2659 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2664 enum btrfs_inline_ref_type {
2665 BTRFS_REF_TYPE_INVALID,
2666 BTRFS_REF_TYPE_BLOCK,
2667 BTRFS_REF_TYPE_DATA,
2671 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2672 struct btrfs_extent_inline_ref *iref,
2673 enum btrfs_inline_ref_type is_data);
2675 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2677 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2680 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2684 * Doing a truncate won't result in new nodes or leaves, just what we need for
2687 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2690 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2693 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans);
2694 bool btrfs_check_space_for_delayed_refs(struct btrfs_fs_info *fs_info);
2695 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2697 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2698 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2699 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2700 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2701 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2702 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2703 unsigned long count);
2704 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2705 struct btrfs_delayed_ref_root *delayed_refs,
2706 struct btrfs_delayed_ref_head *head);
2707 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2708 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2709 struct btrfs_fs_info *fs_info, u64 bytenr,
2710 u64 offset, int metadata, u64 *refs, u64 *flags);
2711 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2712 u64 bytenr, u64 num, int reserved);
2713 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2714 u64 bytenr, u64 num_bytes);
2715 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2716 int btrfs_cross_ref_exist(struct btrfs_root *root,
2717 u64 objectid, u64 offset, u64 bytenr);
2718 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2719 struct btrfs_fs_info *info,
2721 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2722 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2723 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2724 struct btrfs_root *root,
2725 u64 parent, u64 root_objectid,
2726 const struct btrfs_disk_key *key,
2727 int level, u64 hint,
2729 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2730 struct btrfs_root *root,
2731 struct extent_buffer *buf,
2732 u64 parent, int last_ref);
2733 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2734 struct btrfs_root *root, u64 owner,
2735 u64 offset, u64 ram_bytes,
2736 struct btrfs_key *ins);
2737 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2738 u64 root_objectid, u64 owner, u64 offset,
2739 struct btrfs_key *ins);
2740 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2741 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2742 struct btrfs_key *ins, int is_data, int delalloc);
2743 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2744 struct extent_buffer *buf, int full_backref);
2745 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2746 struct extent_buffer *buf, int full_backref);
2747 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2748 struct btrfs_fs_info *fs_info,
2749 u64 bytenr, u64 num_bytes, u64 flags,
2750 int level, int is_data);
2751 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2752 struct btrfs_root *root,
2753 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2754 u64 owner, u64 offset);
2756 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2757 u64 start, u64 len, int delalloc);
2758 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2759 u64 start, u64 len);
2760 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2761 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2762 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2763 struct btrfs_root *root,
2764 u64 bytenr, u64 num_bytes, u64 parent,
2765 u64 root_objectid, u64 owner, u64 offset);
2767 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2768 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
2769 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
2770 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2771 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2772 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2773 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2774 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2775 u64 bytes_used, u64 type, u64 chunk_offset,
2777 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2778 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2779 struct btrfs_fs_info *fs_info,
2780 const u64 chunk_offset);
2781 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2782 u64 group_start, struct extent_map *em);
2783 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2784 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2785 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2786 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2787 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2788 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2789 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2790 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2792 enum btrfs_reserve_flush_enum {
2793 /* If we are in the transaction, we can't flush anything.*/
2794 BTRFS_RESERVE_NO_FLUSH,
2796 * Flushing delalloc may cause deadlock somewhere, in this
2797 * case, use FLUSH LIMIT
2799 BTRFS_RESERVE_FLUSH_LIMIT,
2800 BTRFS_RESERVE_FLUSH_ALL,
2803 enum btrfs_flush_state {
2804 FLUSH_DELAYED_ITEMS_NR = 1,
2805 FLUSH_DELAYED_ITEMS = 2,
2806 FLUSH_DELAYED_REFS_NR = 3,
2807 FLUSH_DELAYED_REFS = 4,
2809 FLUSH_DELALLOC_WAIT = 6,
2811 ALLOC_CHUNK_FORCE = 8,
2815 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2816 int btrfs_check_data_free_space(struct inode *inode,
2817 struct extent_changeset **reserved, u64 start, u64 len);
2818 void btrfs_free_reserved_data_space(struct inode *inode,
2819 struct extent_changeset *reserved, u64 start, u64 len);
2820 void btrfs_delalloc_release_space(struct inode *inode,
2821 struct extent_changeset *reserved,
2822 u64 start, u64 len, bool qgroup_free);
2823 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2825 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2826 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2827 struct btrfs_block_rsv *rsv,
2828 int nitems, bool use_global_rsv);
2829 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2830 struct btrfs_block_rsv *rsv);
2831 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2834 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2835 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes,
2837 int btrfs_delalloc_reserve_space(struct inode *inode,
2838 struct extent_changeset **reserved, u64 start, u64 len);
2839 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2840 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2841 unsigned short type);
2842 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info,
2843 struct btrfs_block_rsv *rsv,
2844 unsigned short type);
2845 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2846 struct btrfs_block_rsv *rsv);
2847 int btrfs_block_rsv_add(struct btrfs_root *root,
2848 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2849 enum btrfs_reserve_flush_enum flush);
2850 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2851 int btrfs_block_rsv_refill(struct btrfs_root *root,
2852 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2853 enum btrfs_reserve_flush_enum flush);
2854 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2855 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2857 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2858 struct btrfs_block_rsv *dest, u64 num_bytes,
2860 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2861 struct btrfs_block_rsv *block_rsv,
2863 void btrfs_delayed_refs_rsv_release(struct btrfs_fs_info *fs_info, int nr);
2864 void btrfs_update_delayed_refs_rsv(struct btrfs_trans_handle *trans);
2865 int btrfs_delayed_refs_rsv_refill(struct btrfs_fs_info *fs_info,
2866 enum btrfs_reserve_flush_enum flush);
2867 void btrfs_migrate_to_delayed_refs_rsv(struct btrfs_fs_info *fs_info,
2868 struct btrfs_block_rsv *src,
2870 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2871 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2872 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2873 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2874 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2875 u64 start, u64 end);
2876 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2877 u64 num_bytes, u64 *actual_bytes);
2878 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2879 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2881 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2882 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2883 struct btrfs_fs_info *fs_info);
2884 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2885 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2886 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2887 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2888 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2889 u64 start, u64 end);
2890 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2893 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2894 int level, int *slot);
2895 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2896 int btrfs_previous_item(struct btrfs_root *root,
2897 struct btrfs_path *path, u64 min_objectid,
2899 int btrfs_previous_extent_item(struct btrfs_root *root,
2900 struct btrfs_path *path, u64 min_objectid);
2901 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2902 struct btrfs_path *path,
2903 const struct btrfs_key *new_key);
2904 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2905 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2906 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2907 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2908 struct btrfs_key *key, int lowest_level,
2910 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2911 struct btrfs_path *path,
2913 enum btrfs_compare_tree_result {
2914 BTRFS_COMPARE_TREE_NEW,
2915 BTRFS_COMPARE_TREE_DELETED,
2916 BTRFS_COMPARE_TREE_CHANGED,
2917 BTRFS_COMPARE_TREE_SAME,
2919 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2920 struct btrfs_path *right_path,
2921 struct btrfs_key *key,
2922 enum btrfs_compare_tree_result result,
2924 int btrfs_compare_trees(struct btrfs_root *left_root,
2925 struct btrfs_root *right_root,
2926 btrfs_changed_cb_t cb, void *ctx);
2927 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2928 struct btrfs_root *root, struct extent_buffer *buf,
2929 struct extent_buffer *parent, int parent_slot,
2930 struct extent_buffer **cow_ret);
2931 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2932 struct btrfs_root *root,
2933 struct extent_buffer *buf,
2934 struct extent_buffer **cow_ret, u64 new_root_objectid);
2935 int btrfs_block_can_be_shared(struct btrfs_root *root,
2936 struct extent_buffer *buf);
2937 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2939 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2940 struct btrfs_path *path, u32 new_size, int from_end);
2941 int btrfs_split_item(struct btrfs_trans_handle *trans,
2942 struct btrfs_root *root,
2943 struct btrfs_path *path,
2944 const struct btrfs_key *new_key,
2945 unsigned long split_offset);
2946 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2947 struct btrfs_root *root,
2948 struct btrfs_path *path,
2949 const struct btrfs_key *new_key);
2950 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2951 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2952 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2953 const struct btrfs_key *key, struct btrfs_path *p,
2954 int ins_len, int cow);
2955 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2956 struct btrfs_path *p, u64 time_seq);
2957 int btrfs_search_slot_for_read(struct btrfs_root *root,
2958 const struct btrfs_key *key,
2959 struct btrfs_path *p, int find_higher,
2961 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2962 struct btrfs_root *root, struct extent_buffer *parent,
2963 int start_slot, u64 *last_ret,
2964 struct btrfs_key *progress);
2965 void btrfs_release_path(struct btrfs_path *p);
2966 struct btrfs_path *btrfs_alloc_path(void);
2967 void btrfs_free_path(struct btrfs_path *p);
2968 void btrfs_set_path_blocking(struct btrfs_path *p);
2969 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2971 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2972 struct btrfs_path *path, int slot, int nr);
2973 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2974 struct btrfs_root *root,
2975 struct btrfs_path *path)
2977 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2980 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2981 const struct btrfs_key *cpu_key, u32 *data_size,
2982 u32 total_data, u32 total_size, int nr);
2983 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2984 const struct btrfs_key *key, void *data, u32 data_size);
2985 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2986 struct btrfs_root *root,
2987 struct btrfs_path *path,
2988 const struct btrfs_key *cpu_key, u32 *data_size,
2991 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2992 struct btrfs_root *root,
2993 struct btrfs_path *path,
2994 const struct btrfs_key *key,
2997 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
3000 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3001 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
3002 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
3004 static inline int btrfs_next_old_item(struct btrfs_root *root,
3005 struct btrfs_path *p, u64 time_seq)
3008 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3009 return btrfs_next_old_leaf(root, p, time_seq);
3012 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3014 return btrfs_next_old_item(root, p, 0);
3016 int btrfs_leaf_free_space(struct extent_buffer *leaf);
3017 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
3018 struct btrfs_block_rsv *block_rsv,
3019 int update_ref, int for_reloc);
3020 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3021 struct btrfs_root *root,
3022 struct extent_buffer *node,
3023 struct extent_buffer *parent);
3024 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3027 * Do it this way so we only ever do one test_bit in the normal case.
3029 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
3030 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
3038 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3039 * anything except sleeping. This function is used to check the status of
3042 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
3044 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
3047 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
3049 kfree(fs_info->balance_ctl);
3050 kfree(fs_info->delayed_root);
3051 kfree(fs_info->extent_root);
3052 kfree(fs_info->tree_root);
3053 kfree(fs_info->chunk_root);
3054 kfree(fs_info->dev_root);
3055 kfree(fs_info->csum_root);
3056 kfree(fs_info->quota_root);
3057 kfree(fs_info->uuid_root);
3058 kfree(fs_info->free_space_root);
3059 kfree(fs_info->super_copy);
3060 kfree(fs_info->super_for_commit);
3064 /* tree mod log functions from ctree.c */
3065 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
3066 struct seq_list *elem);
3067 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
3068 struct seq_list *elem);
3069 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3072 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3073 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3075 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3076 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3078 int btrfs_del_root(struct btrfs_trans_handle *trans,
3079 const struct btrfs_key *key);
3080 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3081 const struct btrfs_key *key,
3082 struct btrfs_root_item *item);
3083 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3084 struct btrfs_root *root,
3085 struct btrfs_key *key,
3086 struct btrfs_root_item *item);
3087 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3088 struct btrfs_path *path, struct btrfs_root_item *root_item,
3089 struct btrfs_key *root_key);
3090 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3091 void btrfs_set_root_node(struct btrfs_root_item *item,
3092 struct extent_buffer *node);
3093 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3094 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3095 struct btrfs_root *root);
3098 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3100 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3102 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3103 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3107 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3108 const char *name, int name_len);
3109 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3110 int name_len, struct btrfs_inode *dir,
3111 struct btrfs_key *location, u8 type, u64 index);
3112 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3113 struct btrfs_root *root,
3114 struct btrfs_path *path, u64 dir,
3115 const char *name, int name_len,
3117 struct btrfs_dir_item *
3118 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3119 struct btrfs_root *root,
3120 struct btrfs_path *path, u64 dir,
3121 u64 objectid, const char *name, int name_len,
3123 struct btrfs_dir_item *
3124 btrfs_search_dir_index_item(struct btrfs_root *root,
3125 struct btrfs_path *path, u64 dirid,
3126 const char *name, int name_len);
3127 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3128 struct btrfs_root *root,
3129 struct btrfs_path *path,
3130 struct btrfs_dir_item *di);
3131 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3132 struct btrfs_root *root,
3133 struct btrfs_path *path, u64 objectid,
3134 const char *name, u16 name_len,
3135 const void *data, u16 data_len);
3136 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3137 struct btrfs_root *root,
3138 struct btrfs_path *path, u64 dir,
3139 const char *name, u16 name_len,
3141 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3142 struct btrfs_path *path,
3147 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3148 struct btrfs_root *root, u64 offset);
3149 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3150 struct btrfs_root *root, u64 offset);
3151 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3154 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3155 struct btrfs_root *root,
3156 const char *name, int name_len,
3157 u64 inode_objectid, u64 ref_objectid, u64 index);
3158 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root,
3160 const char *name, int name_len,
3161 u64 inode_objectid, u64 ref_objectid, u64 *index);
3162 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_path *path, u64 objectid);
3165 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3166 *root, struct btrfs_path *path,
3167 struct btrfs_key *location, int mod);
3169 struct btrfs_inode_extref *
3170 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3171 struct btrfs_root *root,
3172 struct btrfs_path *path,
3173 const char *name, int name_len,
3174 u64 inode_objectid, u64 ref_objectid, int ins_len,
3177 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3179 int name_len, struct btrfs_inode_ref **ref_ret);
3180 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3181 u64 ref_objectid, const char *name,
3183 struct btrfs_inode_extref **extref_ret);
3186 struct btrfs_dio_private;
3187 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3188 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3189 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3190 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3191 u64 logical_offset);
3192 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3193 struct btrfs_root *root,
3194 u64 objectid, u64 pos,
3195 u64 disk_offset, u64 disk_num_bytes,
3196 u64 num_bytes, u64 offset, u64 ram_bytes,
3197 u8 compression, u8 encryption, u16 other_encoding);
3198 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3199 struct btrfs_root *root,
3200 struct btrfs_path *path, u64 objectid,
3201 u64 bytenr, int mod);
3202 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3203 struct btrfs_root *root,
3204 struct btrfs_ordered_sum *sums);
3205 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3206 u64 file_start, int contig);
3207 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3208 struct list_head *list, int search_commit);
3209 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3210 const struct btrfs_path *path,
3211 struct btrfs_file_extent_item *fi,
3212 const bool new_inline,
3213 struct extent_map *em);
3216 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3217 u64 start, u64 len);
3218 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3219 u64 *orig_start, u64 *orig_block_len,
3222 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3223 struct btrfs_inode *inode);
3224 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3225 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3226 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3227 struct btrfs_root *root,
3228 struct btrfs_inode *dir, struct btrfs_inode *inode,
3229 const char *name, int name_len);
3230 int btrfs_add_link(struct btrfs_trans_handle *trans,
3231 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3232 const char *name, int name_len, int add_backref, u64 index);
3233 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3234 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3236 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3237 struct btrfs_root *root,
3238 struct inode *inode, u64 new_size,
3241 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3242 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3243 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3244 unsigned int extra_bits,
3245 struct extent_state **cached_state, int dedupe);
3246 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3247 struct btrfs_root *new_root,
3248 struct btrfs_root *parent_root,
3250 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3252 void btrfs_clear_delalloc_extent(struct inode *inode,
3253 struct extent_state *state, unsigned *bits);
3254 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3255 struct extent_state *other);
3256 void btrfs_split_delalloc_extent(struct inode *inode,
3257 struct extent_state *orig, u64 split);
3258 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3259 unsigned long bio_flags);
3260 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3261 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3262 int btrfs_readpage(struct file *file, struct page *page);
3263 void btrfs_evict_inode(struct inode *inode);
3264 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3265 struct inode *btrfs_alloc_inode(struct super_block *sb);
3266 void btrfs_destroy_inode(struct inode *inode);
3267 int btrfs_drop_inode(struct inode *inode);
3268 int __init btrfs_init_cachep(void);
3269 void __cold btrfs_destroy_cachep(void);
3270 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3271 struct btrfs_root *root, int *new,
3272 struct btrfs_path *path);
3273 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3274 struct btrfs_root *root, int *was_new);
3275 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3276 struct page *page, size_t pg_offset,
3277 u64 start, u64 end, int create);
3278 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3279 struct btrfs_root *root,
3280 struct inode *inode);
3281 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3282 struct btrfs_root *root, struct inode *inode);
3283 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3284 struct btrfs_inode *inode);
3285 int btrfs_orphan_cleanup(struct btrfs_root *root);
3286 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3287 void btrfs_add_delayed_iput(struct inode *inode);
3288 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3289 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3290 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3291 u64 start, u64 num_bytes, u64 min_size,
3292 loff_t actual_len, u64 *alloc_hint);
3293 int btrfs_prealloc_file_range_trans(struct inode *inode,
3294 struct btrfs_trans_handle *trans, int mode,
3295 u64 start, u64 num_bytes, u64 min_size,
3296 loff_t actual_len, u64 *alloc_hint);
3297 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
3298 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3299 struct writeback_control *wbc);
3300 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3301 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3302 u64 end, int uptodate);
3303 extern const struct dentry_operations btrfs_dentry_operations;
3306 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3307 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3308 int btrfs_ioctl_get_supported_features(void __user *arg);
3309 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3310 int btrfs_is_empty_uuid(u8 *uuid);
3311 int btrfs_defrag_file(struct inode *inode, struct file *file,
3312 struct btrfs_ioctl_defrag_range_args *range,
3313 u64 newer_than, unsigned long max_pages);
3314 void btrfs_get_block_group_info(struct list_head *groups_list,
3315 struct btrfs_ioctl_space_info *space);
3316 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3317 struct btrfs_ioctl_balance_args *bargs);
3320 int __init btrfs_auto_defrag_init(void);
3321 void __cold btrfs_auto_defrag_exit(void);
3322 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3323 struct btrfs_inode *inode);
3324 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3325 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3326 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3327 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3329 extern const struct file_operations btrfs_file_operations;
3330 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3331 struct btrfs_root *root, struct inode *inode,
3332 struct btrfs_path *path, u64 start, u64 end,
3333 u64 *drop_end, int drop_cache,
3335 u32 extent_item_size,
3337 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3338 struct btrfs_root *root, struct inode *inode, u64 start,
3339 u64 end, int drop_cache);
3340 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3341 struct btrfs_inode *inode, u64 start, u64 end);
3342 int btrfs_release_file(struct inode *inode, struct file *file);
3343 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3344 size_t num_pages, loff_t pos, size_t write_bytes,
3345 struct extent_state **cached);
3346 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3347 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
3348 struct file *file_out, loff_t pos_out,
3349 loff_t len, unsigned int remap_flags);
3352 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3353 struct btrfs_root *root);
3356 int __init btrfs_init_sysfs(void);
3357 void __cold btrfs_exit_sysfs(void);
3358 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3359 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3362 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3363 unsigned long new_flags);
3364 int btrfs_sync_fs(struct super_block *sb, int wait);
3366 static inline __printf(2, 3) __cold
3367 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3371 #ifdef CONFIG_PRINTK
3374 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3376 #define btrfs_printk(fs_info, fmt, args...) \
3377 btrfs_no_printk(fs_info, fmt, ##args)
3380 #define btrfs_emerg(fs_info, fmt, args...) \
3381 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3382 #define btrfs_alert(fs_info, fmt, args...) \
3383 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3384 #define btrfs_crit(fs_info, fmt, args...) \
3385 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3386 #define btrfs_err(fs_info, fmt, args...) \
3387 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3388 #define btrfs_warn(fs_info, fmt, args...) \
3389 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3390 #define btrfs_notice(fs_info, fmt, args...) \
3391 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3392 #define btrfs_info(fs_info, fmt, args...) \
3393 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3396 * Wrappers that use printk_in_rcu
3398 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3399 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3400 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3401 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3402 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3403 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3404 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3405 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3406 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3407 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3408 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3409 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3410 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3411 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3414 * Wrappers that use a ratelimited printk_in_rcu
3416 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3417 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3418 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3419 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3420 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3421 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3422 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3423 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3424 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3425 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3426 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3427 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3428 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3429 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3432 * Wrappers that use a ratelimited printk
3434 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3435 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3436 #define btrfs_alert_rl(fs_info, fmt, args...) \
3437 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3438 #define btrfs_crit_rl(fs_info, fmt, args...) \
3439 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3440 #define btrfs_err_rl(fs_info, fmt, args...) \
3441 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3442 #define btrfs_warn_rl(fs_info, fmt, args...) \
3443 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3444 #define btrfs_notice_rl(fs_info, fmt, args...) \
3445 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3446 #define btrfs_info_rl(fs_info, fmt, args...) \
3447 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3449 #if defined(CONFIG_DYNAMIC_DEBUG)
3450 #define btrfs_debug(fs_info, fmt, args...) \
3451 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3452 fs_info, KERN_DEBUG fmt, ##args)
3453 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3454 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3455 fs_info, KERN_DEBUG fmt, ##args)
3456 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3457 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3458 fs_info, KERN_DEBUG fmt, ##args)
3459 #define btrfs_debug_rl(fs_info, fmt, args...) \
3460 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3461 fs_info, KERN_DEBUG fmt, ##args)
3462 #elif defined(DEBUG)
3463 #define btrfs_debug(fs_info, fmt, args...) \
3464 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3465 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3466 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3467 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3468 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3469 #define btrfs_debug_rl(fs_info, fmt, args...) \
3470 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3472 #define btrfs_debug(fs_info, fmt, args...) \
3473 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3474 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3475 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3476 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3477 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3478 #define btrfs_debug_rl(fs_info, fmt, args...) \
3479 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3482 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3485 btrfs_printk(fs_info, fmt, ##args); \
3486 rcu_read_unlock(); \
3489 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3492 btrfs_no_printk(fs_info, fmt, ##args); \
3493 rcu_read_unlock(); \
3496 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3498 static DEFINE_RATELIMIT_STATE(_rs, \
3499 DEFAULT_RATELIMIT_INTERVAL, \
3500 DEFAULT_RATELIMIT_BURST); \
3501 if (__ratelimit(&_rs)) \
3502 btrfs_printk(fs_info, fmt, ##args); \
3505 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3508 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3509 rcu_read_unlock(); \
3513 static inline void assfail(const char *expr, const char *file, int line)
3515 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3516 pr_err("assertion failed: %s, file: %s, line: %d\n",
3522 #define ASSERT(expr) \
3523 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3526 * Use that for functions that are conditionally exported for sanity tests but
3529 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3530 #define EXPORT_FOR_TESTS static
3532 #define EXPORT_FOR_TESTS
3536 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3539 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3544 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3545 unsigned int line, int errno, const char *fmt, ...);
3547 const char *btrfs_decode_error(int errno);
3550 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3551 const char *function,
3552 unsigned int line, int errno);
3555 * Call btrfs_abort_transaction as early as possible when an error condition is
3556 * detected, that way the exact line number is reported.
3558 #define btrfs_abort_transaction(trans, errno) \
3560 /* Report first abort since mount */ \
3561 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3562 &((trans)->fs_info->fs_state))) { \
3563 if ((errno) != -EIO) { \
3564 WARN(1, KERN_DEBUG \
3565 "BTRFS: Transaction aborted (error %d)\n", \
3568 btrfs_debug((trans)->fs_info, \
3569 "Transaction aborted (error %d)", \
3573 __btrfs_abort_transaction((trans), __func__, \
3574 __LINE__, (errno)); \
3577 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3579 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3580 (errno), fmt, ##args); \
3585 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3586 unsigned int line, int errno, const char *fmt, ...);
3588 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3589 * will panic(). Otherwise we BUG() here.
3591 #define btrfs_panic(fs_info, errno, fmt, args...) \
3593 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3598 /* compatibility and incompatibility defines */
3600 #define btrfs_set_fs_incompat(__fs_info, opt) \
3601 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3603 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3606 struct btrfs_super_block *disk_super;
3609 disk_super = fs_info->super_copy;
3610 features = btrfs_super_incompat_flags(disk_super);
3611 if (!(features & flag)) {
3612 spin_lock(&fs_info->super_lock);
3613 features = btrfs_super_incompat_flags(disk_super);
3614 if (!(features & flag)) {
3616 btrfs_set_super_incompat_flags(disk_super, features);
3617 btrfs_info(fs_info, "setting %llu feature flag",
3620 spin_unlock(&fs_info->super_lock);
3624 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3625 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3627 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3630 struct btrfs_super_block *disk_super;
3633 disk_super = fs_info->super_copy;
3634 features = btrfs_super_incompat_flags(disk_super);
3635 if (features & flag) {
3636 spin_lock(&fs_info->super_lock);
3637 features = btrfs_super_incompat_flags(disk_super);
3638 if (features & flag) {
3640 btrfs_set_super_incompat_flags(disk_super, features);
3641 btrfs_info(fs_info, "clearing %llu feature flag",
3644 spin_unlock(&fs_info->super_lock);
3648 #define btrfs_fs_incompat(fs_info, opt) \
3649 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3651 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3653 struct btrfs_super_block *disk_super;
3654 disk_super = fs_info->super_copy;
3655 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3658 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3659 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3661 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3664 struct btrfs_super_block *disk_super;
3667 disk_super = fs_info->super_copy;
3668 features = btrfs_super_compat_ro_flags(disk_super);
3669 if (!(features & flag)) {
3670 spin_lock(&fs_info->super_lock);
3671 features = btrfs_super_compat_ro_flags(disk_super);
3672 if (!(features & flag)) {
3674 btrfs_set_super_compat_ro_flags(disk_super, features);
3675 btrfs_info(fs_info, "setting %llu ro feature flag",
3678 spin_unlock(&fs_info->super_lock);
3682 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3683 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3685 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3688 struct btrfs_super_block *disk_super;
3691 disk_super = fs_info->super_copy;
3692 features = btrfs_super_compat_ro_flags(disk_super);
3693 if (features & flag) {
3694 spin_lock(&fs_info->super_lock);
3695 features = btrfs_super_compat_ro_flags(disk_super);
3696 if (features & flag) {
3698 btrfs_set_super_compat_ro_flags(disk_super, features);
3699 btrfs_info(fs_info, "clearing %llu ro feature flag",
3702 spin_unlock(&fs_info->super_lock);
3706 #define btrfs_fs_compat_ro(fs_info, opt) \
3707 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3709 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3711 struct btrfs_super_block *disk_super;
3712 disk_super = fs_info->super_copy;
3713 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3717 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3718 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3719 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3720 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3721 struct inode *inode, struct inode *dir);
3723 #define btrfs_get_acl NULL
3724 #define btrfs_set_acl NULL
3725 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3726 struct inode *inode, struct inode *dir)
3733 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3734 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3735 struct btrfs_root *root);
3736 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3737 struct btrfs_root *root);
3738 int btrfs_recover_relocation(struct btrfs_root *root);
3739 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3740 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3741 struct btrfs_root *root, struct extent_buffer *buf,
3742 struct extent_buffer *cow);
3743 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3744 u64 *bytes_to_reserve);
3745 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3746 struct btrfs_pending_snapshot *pending);
3749 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3750 u64 end, struct btrfs_scrub_progress *progress,
3751 int readonly, int is_dev_replace);
3752 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3753 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3754 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3755 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3756 struct btrfs_device *dev);
3757 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3758 struct btrfs_scrub_progress *progress);
3759 static inline void btrfs_init_full_stripe_locks_tree(
3760 struct btrfs_full_stripe_locks_tree *locks_root)
3762 locks_root->root = RB_ROOT;
3763 mutex_init(&locks_root->lock);
3767 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3768 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3769 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3771 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3773 btrfs_bio_counter_sub(fs_info, 1);
3777 struct reada_control {
3778 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3779 struct btrfs_key key_start;
3780 struct btrfs_key key_end; /* exclusive */
3783 wait_queue_head_t wait;
3785 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3786 struct btrfs_key *start, struct btrfs_key *end);
3787 int btrfs_reada_wait(void *handle);
3788 void btrfs_reada_detach(void *handle);
3789 int btree_readahead_hook(struct extent_buffer *eb, int err);
3791 static inline int is_fstree(u64 rootid)
3793 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3794 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3795 !btrfs_qgroup_level(rootid)))
3800 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3802 return signal_pending(current);
3805 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3807 /* Sanity test specific functions */
3808 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3809 void btrfs_test_inode_set_ops(struct inode *inode);
3810 void btrfs_test_destroy_inode(struct inode *inode);
3812 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3814 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3817 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3823 static inline void cond_wake_up(struct wait_queue_head *wq)
3826 * This implies a full smp_mb barrier, see comments for
3827 * waitqueue_active why.
3829 if (wq_has_sleeper(wq))
3833 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3836 * Special case for conditional wakeup where the barrier required for
3837 * waitqueue_active is implied by some of the preceding code. Eg. one
3838 * of such atomic operations (atomic_dec_and_return, ...), or a
3839 * unlock/lock sequence, etc.
3841 if (waitqueue_active(wq))