2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
23 #include <linux/sched/signal.h>
24 #include <linux/highmem.h>
26 #include <linux/rwsem.h>
27 #include <linux/semaphore.h>
28 #include <linux/completion.h>
29 #include <linux/backing-dev.h>
30 #include <linux/wait.h>
31 #include <linux/slab.h>
32 #include <linux/kobject.h>
33 #include <trace/events/btrfs.h>
34 #include <asm/kmap_types.h>
35 #include <linux/pagemap.h>
36 #include <linux/btrfs.h>
37 #include <linux/btrfs_tree.h>
38 #include <linux/workqueue.h>
39 #include <linux/security.h>
40 #include <linux/sizes.h>
41 #include <linux/dynamic_debug.h>
42 #include <linux/refcount.h>
43 #include "extent_io.h"
44 #include "extent_map.h"
45 #include "async-thread.h"
47 struct btrfs_trans_handle;
48 struct btrfs_transaction;
49 struct btrfs_pending_snapshot;
50 extern struct kmem_cache *btrfs_trans_handle_cachep;
51 extern struct kmem_cache *btrfs_bit_radix_cachep;
52 extern struct kmem_cache *btrfs_path_cachep;
53 extern struct kmem_cache *btrfs_free_space_cachep;
54 struct btrfs_ordered_sum;
56 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
57 #define STATIC noinline
59 #define STATIC static noinline
62 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
64 #define BTRFS_MAX_MIRRORS 3
66 #define BTRFS_MAX_LEVEL 8
68 #define BTRFS_COMPAT_EXTENT_TREE_V0
71 * the max metadata block size. This limit is somewhat artificial,
72 * but the memmove costs go through the roof for larger blocks.
74 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
77 * we can actually store much bigger names, but lets not confuse the rest
80 #define BTRFS_NAME_LEN 255
83 * Theoretical limit is larger, but we keep this down to a sane
84 * value. That should limit greatly the possibility of collisions on
87 #define BTRFS_LINK_MAX 65535U
89 static const int btrfs_csum_sizes[] = { 4 };
91 /* four bytes for CRC32 */
92 #define BTRFS_EMPTY_DIR_SIZE 0
94 /* ioprio of readahead is set to idle */
95 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
97 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
99 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
102 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
104 static inline u32 count_max_extents(u64 size)
106 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
109 struct btrfs_mapping_tree {
110 struct extent_map_tree map_tree;
113 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
115 BUG_ON(num_stripes == 0);
116 return sizeof(struct btrfs_chunk) +
117 sizeof(struct btrfs_stripe) * (num_stripes - 1);
123 #define BTRFS_FS_STATE_ERROR 0
124 #define BTRFS_FS_STATE_REMOUNTING 1
125 #define BTRFS_FS_STATE_TRANS_ABORTED 2
126 #define BTRFS_FS_STATE_DEV_REPLACING 3
127 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
129 #define BTRFS_BACKREF_REV_MAX 256
130 #define BTRFS_BACKREF_REV_SHIFT 56
131 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
132 BTRFS_BACKREF_REV_SHIFT)
134 #define BTRFS_OLD_BACKREF_REV 0
135 #define BTRFS_MIXED_BACKREF_REV 1
138 * every tree block (leaf or node) starts with this header.
140 struct btrfs_header {
141 /* these first four must match the super block */
142 u8 csum[BTRFS_CSUM_SIZE];
143 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
144 __le64 bytenr; /* which block this node is supposed to live in */
147 /* allowed to be different from the super from here on down */
148 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
153 } __attribute__ ((__packed__));
156 * this is a very generous portion of the super block, giving us
157 * room to translate 14 chunks with 3 stripes each.
159 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
162 * just in case we somehow lose the roots and are not able to mount,
163 * we store an array of the roots from previous transactions
166 #define BTRFS_NUM_BACKUP_ROOTS 4
167 struct btrfs_root_backup {
169 __le64 tree_root_gen;
172 __le64 chunk_root_gen;
175 __le64 extent_root_gen;
184 __le64 csum_root_gen;
194 u8 extent_root_level;
198 /* future and to align */
200 } __attribute__ ((__packed__));
203 * the super block basically lists the main trees of the FS
204 * it currently lacks any block count etc etc
206 struct btrfs_super_block {
207 u8 csum[BTRFS_CSUM_SIZE];
208 /* the first 4 fields must match struct btrfs_header */
209 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
210 __le64 bytenr; /* this block number */
213 /* allowed to be different from the btrfs_header from here own down */
220 /* this will help find the new super based on the log root */
221 __le64 log_root_transid;
224 __le64 root_dir_objectid;
228 __le32 __unused_leafsize;
230 __le32 sys_chunk_array_size;
231 __le64 chunk_root_generation;
233 __le64 compat_ro_flags;
234 __le64 incompat_flags;
239 struct btrfs_dev_item dev_item;
241 char label[BTRFS_LABEL_SIZE];
243 __le64 cache_generation;
244 __le64 uuid_tree_generation;
246 /* future expansion */
248 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
249 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
250 } __attribute__ ((__packed__));
253 * Compat flags that we support. If any incompat flags are set other than the
254 * ones specified below then we will fail to mount
256 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
257 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
258 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
260 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
261 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
262 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
264 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
265 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
267 #define BTRFS_FEATURE_INCOMPAT_SUPP \
268 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
269 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
270 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
271 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
272 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
273 BTRFS_FEATURE_INCOMPAT_RAID56 | \
274 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
275 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
276 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
278 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
279 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
280 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
283 * A leaf is full of items. offset and size tell us where to find
284 * the item in the leaf (relative to the start of the data area)
287 struct btrfs_disk_key key;
290 } __attribute__ ((__packed__));
293 * leaves have an item area and a data area:
294 * [item0, item1....itemN] [free space] [dataN...data1, data0]
296 * The data is separate from the items to get the keys closer together
300 struct btrfs_header header;
301 struct btrfs_item items[];
302 } __attribute__ ((__packed__));
305 * all non-leaf blocks are nodes, they hold only keys and pointers to
308 struct btrfs_key_ptr {
309 struct btrfs_disk_key key;
312 } __attribute__ ((__packed__));
315 struct btrfs_header header;
316 struct btrfs_key_ptr ptrs[];
317 } __attribute__ ((__packed__));
320 * btrfs_paths remember the path taken from the root down to the leaf.
321 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
322 * to any other levels that are present.
324 * The slots array records the index of the item or block pointer
325 * used while walking the tree.
327 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
329 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
330 int slots[BTRFS_MAX_LEVEL];
331 /* if there is real range locking, this locks field will change */
332 u8 locks[BTRFS_MAX_LEVEL];
334 /* keep some upper locks as we walk down */
338 * set by btrfs_split_item, tells search_slot to keep all locks
339 * and to force calls to keep space in the nodes
341 unsigned int search_for_split:1;
342 unsigned int keep_locks:1;
343 unsigned int skip_locking:1;
344 unsigned int leave_spinning:1;
345 unsigned int search_commit_root:1;
346 unsigned int need_commit_sem:1;
347 unsigned int skip_release_on_error:1;
349 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
350 sizeof(struct btrfs_item))
351 struct btrfs_dev_replace {
352 u64 replace_state; /* see #define above */
353 u64 time_started; /* seconds since 1-Jan-1970 */
354 u64 time_stopped; /* seconds since 1-Jan-1970 */
355 atomic64_t num_write_errors;
356 atomic64_t num_uncorrectable_read_errors;
359 u64 committed_cursor_left;
360 u64 cursor_left_last_write_of_item;
363 u64 cont_reading_from_srcdev_mode; /* see #define above */
366 int item_needs_writeback;
367 struct btrfs_device *srcdev;
368 struct btrfs_device *tgtdev;
371 atomic_t nesting_level;
372 struct mutex lock_finishing_cancel_unmount;
375 atomic_t blocking_readers;
376 wait_queue_head_t read_lock_wq;
378 struct btrfs_scrub_progress scrub_progress;
381 /* For raid type sysfs entries */
382 struct raid_kobject {
387 struct btrfs_space_info {
390 u64 total_bytes; /* total bytes in the space,
391 this doesn't take mirrors into account */
392 u64 bytes_used; /* total bytes used,
393 this doesn't take mirrors into account */
394 u64 bytes_pinned; /* total bytes pinned, will be freed when the
395 transaction finishes */
396 u64 bytes_reserved; /* total bytes the allocator has reserved for
397 current allocations */
398 u64 bytes_may_use; /* number of bytes that may be used for
399 delalloc/allocations */
400 u64 bytes_readonly; /* total bytes that are read only */
402 u64 max_extent_size; /* This will hold the maximum extent size of
403 the space info if we had an ENOSPC in the
406 unsigned int full:1; /* indicates that we cannot allocate any more
407 chunks for this space */
408 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
410 unsigned int flush:1; /* set if we are trying to make space */
412 unsigned int force_alloc; /* set if we need to force a chunk
413 alloc for this space */
415 u64 disk_used; /* total bytes used on disk */
416 u64 disk_total; /* total bytes on disk, takes mirrors into
422 * bytes_pinned is kept in line with what is actually pinned, as in
423 * we've called update_block_group and dropped the bytes_used counter
424 * and increased the bytes_pinned counter. However this means that
425 * bytes_pinned does not reflect the bytes that will be pinned once the
426 * delayed refs are flushed, so this counter is inc'ed every time we
427 * call btrfs_free_extent so it is a realtime count of what will be
428 * freed once the transaction is committed. It will be zeroed every
429 * time the transaction commits.
431 struct percpu_counter total_bytes_pinned;
433 struct list_head list;
434 /* Protected by the spinlock 'lock'. */
435 struct list_head ro_bgs;
436 struct list_head priority_tickets;
437 struct list_head tickets;
439 * tickets_id just indicates the next ticket will be handled, so note
440 * it's not stored per ticket.
444 struct rw_semaphore groups_sem;
445 /* for block groups in our same type */
446 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
447 wait_queue_head_t wait;
450 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
453 #define BTRFS_BLOCK_RSV_GLOBAL 1
454 #define BTRFS_BLOCK_RSV_DELALLOC 2
455 #define BTRFS_BLOCK_RSV_TRANS 3
456 #define BTRFS_BLOCK_RSV_CHUNK 4
457 #define BTRFS_BLOCK_RSV_DELOPS 5
458 #define BTRFS_BLOCK_RSV_EMPTY 6
459 #define BTRFS_BLOCK_RSV_TEMP 7
461 struct btrfs_block_rsv {
464 struct btrfs_space_info *space_info;
468 unsigned short failfast;
472 * free clusters are used to claim free space in relatively large chunks,
473 * allowing us to do less seeky writes. They are used for all metadata
474 * allocations. In ssd_spread mode they are also used for data allocations.
476 struct btrfs_free_cluster {
478 spinlock_t refill_lock;
481 /* largest extent in this cluster */
484 /* first extent starting offset */
487 /* We did a full search and couldn't create a cluster */
490 struct btrfs_block_group_cache *block_group;
492 * when a cluster is allocated from a block group, we put the
493 * cluster onto a list in the block group so that it can
494 * be freed before the block group is freed.
496 struct list_head block_group_list;
499 enum btrfs_caching_type {
501 BTRFS_CACHE_STARTED = 1,
502 BTRFS_CACHE_FAST = 2,
503 BTRFS_CACHE_FINISHED = 3,
504 BTRFS_CACHE_ERROR = 4,
507 enum btrfs_disk_cache_state {
508 BTRFS_DC_WRITTEN = 0,
514 struct btrfs_caching_control {
515 struct list_head list;
517 wait_queue_head_t wait;
518 struct btrfs_work work;
519 struct btrfs_block_group_cache *block_group;
524 /* Once caching_thread() finds this much free space, it will wake up waiters. */
525 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
527 struct btrfs_io_ctl {
531 struct btrfs_fs_info *fs_info;
538 unsigned check_crcs:1;
542 * Tree to record all locked full stripes of a RAID5/6 block group
544 struct btrfs_full_stripe_locks_tree {
549 struct btrfs_block_group_cache {
550 struct btrfs_key key;
551 struct btrfs_block_group_item item;
552 struct btrfs_fs_info *fs_info;
560 u64 cache_generation;
563 * If the free space extent count exceeds this number, convert the block
566 u32 bitmap_high_thresh;
569 * If the free space extent count drops below this number, convert the
570 * block group back to extents.
572 u32 bitmap_low_thresh;
575 * It is just used for the delayed data space allocation because
576 * only the data space allocation and the relative metadata update
577 * can be done cross the transaction.
579 struct rw_semaphore data_rwsem;
581 /* for raid56, this is a full stripe, without parity */
582 unsigned long full_stripe_len;
586 unsigned int has_caching_ctl:1;
587 unsigned int removed:1;
589 int disk_cache_state;
591 /* cache tracking stuff */
593 struct btrfs_caching_control *caching_ctl;
594 u64 last_byte_to_unpin;
596 struct btrfs_space_info *space_info;
598 /* free space cache stuff */
599 struct btrfs_free_space_ctl *free_space_ctl;
601 /* block group cache stuff */
602 struct rb_node cache_node;
604 /* for block groups in the same raid type */
605 struct list_head list;
610 /* List of struct btrfs_free_clusters for this block group.
611 * Today it will only have one thing on it, but that may change
613 struct list_head cluster_list;
615 /* For delayed block group creation or deletion of empty block groups */
616 struct list_head bg_list;
618 /* For read-only block groups */
619 struct list_head ro_list;
623 /* For dirty block groups */
624 struct list_head dirty_list;
625 struct list_head io_list;
627 struct btrfs_io_ctl io_ctl;
630 * Incremented when doing extent allocations and holding a read lock
631 * on the space_info's groups_sem semaphore.
632 * Decremented when an ordered extent that represents an IO against this
633 * block group's range is created (after it's added to its inode's
634 * root's list of ordered extents) or immediately after the allocation
635 * if it's a metadata extent or fallocate extent (for these cases we
636 * don't create ordered extents).
638 atomic_t reservations;
641 * Incremented while holding the spinlock *lock* by a task checking if
642 * it can perform a nocow write (incremented if the value for the *ro*
643 * field is 0). Decremented by such tasks once they create an ordered
644 * extent or before that if some error happens before reaching that step.
645 * This is to prevent races between block group relocation and nocow
646 * writes through direct IO.
648 atomic_t nocow_writers;
650 /* Lock for free space tree operations. */
651 struct mutex free_space_lock;
654 * Does the block group need to be added to the free space tree?
655 * Protected by free_space_lock.
657 int needs_free_space;
659 /* Record locked full stripes for RAID5/6 block group */
660 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
663 /* delayed seq elem */
665 struct list_head list;
669 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
671 #define SEQ_LAST ((u64)-1)
673 enum btrfs_orphan_cleanup_state {
674 ORPHAN_CLEANUP_STARTED = 1,
675 ORPHAN_CLEANUP_DONE = 2,
678 /* used by the raid56 code to lock stripes for read/modify/write */
679 struct btrfs_stripe_hash {
680 struct list_head hash_list;
681 wait_queue_head_t wait;
685 /* used by the raid56 code to lock stripes for read/modify/write */
686 struct btrfs_stripe_hash_table {
687 struct list_head stripe_cache;
688 spinlock_t cache_lock;
690 struct btrfs_stripe_hash table[];
693 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
695 void btrfs_init_async_reclaim_work(struct work_struct *work);
698 struct reloc_control;
700 struct btrfs_fs_devices;
701 struct btrfs_balance_control;
702 struct btrfs_delayed_root;
704 #define BTRFS_FS_BARRIER 1
705 #define BTRFS_FS_CLOSING_START 2
706 #define BTRFS_FS_CLOSING_DONE 3
707 #define BTRFS_FS_LOG_RECOVERING 4
708 #define BTRFS_FS_OPEN 5
709 #define BTRFS_FS_QUOTA_ENABLED 6
710 #define BTRFS_FS_QUOTA_ENABLING 7
711 #define BTRFS_FS_QUOTA_DISABLING 8
712 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
713 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
714 #define BTRFS_FS_BTREE_ERR 11
715 #define BTRFS_FS_LOG1_ERR 12
716 #define BTRFS_FS_LOG2_ERR 13
717 #define BTRFS_FS_QUOTA_OVERRIDE 14
718 /* Used to record internally whether fs has been frozen */
719 #define BTRFS_FS_FROZEN 15
722 * Indicate that a whole-filesystem exclusive operation is running
723 * (device replace, resize, device add/delete, balance)
725 #define BTRFS_FS_EXCL_OP 14
727 struct btrfs_fs_info {
728 u8 fsid[BTRFS_FSID_SIZE];
729 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
731 struct btrfs_root *extent_root;
732 struct btrfs_root *tree_root;
733 struct btrfs_root *chunk_root;
734 struct btrfs_root *dev_root;
735 struct btrfs_root *fs_root;
736 struct btrfs_root *csum_root;
737 struct btrfs_root *quota_root;
738 struct btrfs_root *uuid_root;
739 struct btrfs_root *free_space_root;
741 /* the log root tree is a directory of all the other log roots */
742 struct btrfs_root *log_root_tree;
744 spinlock_t fs_roots_radix_lock;
745 struct radix_tree_root fs_roots_radix;
747 /* block group cache stuff */
748 spinlock_t block_group_cache_lock;
749 u64 first_logical_byte;
750 struct rb_root block_group_cache_tree;
752 /* keep track of unallocated space */
753 atomic64_t free_chunk_space;
755 struct extent_io_tree freed_extents[2];
756 struct extent_io_tree *pinned_extents;
758 /* logical->physical extent mapping */
759 struct btrfs_mapping_tree mapping_tree;
762 * block reservation for extent, checksum, root tree and
763 * delayed dir index item
765 struct btrfs_block_rsv global_block_rsv;
766 /* block reservation for delay allocation */
767 struct btrfs_block_rsv delalloc_block_rsv;
768 /* block reservation for metadata operations */
769 struct btrfs_block_rsv trans_block_rsv;
770 /* block reservation for chunk tree */
771 struct btrfs_block_rsv chunk_block_rsv;
772 /* block reservation for delayed operations */
773 struct btrfs_block_rsv delayed_block_rsv;
775 struct btrfs_block_rsv empty_block_rsv;
778 u64 last_trans_committed;
779 u64 avg_delayed_ref_runtime;
782 * this is updated to the current trans every time a full commit
783 * is required instead of the faster short fsync log commits
785 u64 last_trans_log_full_commit;
786 unsigned long mount_opt;
788 * Track requests for actions that need to be done during transaction
789 * commit (like for some mount options).
791 unsigned long pending_changes;
792 unsigned long compress_type:4;
795 * It is a suggestive number, the read side is safe even it gets a
796 * wrong number because we will write out the data into a regular
797 * extent. The write side(mount/remount) is under ->s_umount lock,
798 * so it is also safe.
802 struct btrfs_transaction *running_transaction;
803 wait_queue_head_t transaction_throttle;
804 wait_queue_head_t transaction_wait;
805 wait_queue_head_t transaction_blocked_wait;
806 wait_queue_head_t async_submit_wait;
809 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
810 * when they are updated.
812 * Because we do not clear the flags for ever, so we needn't use
813 * the lock on the read side.
815 * We also needn't use the lock when we mount the fs, because
816 * there is no other task which will update the flag.
818 spinlock_t super_lock;
819 struct btrfs_super_block *super_copy;
820 struct btrfs_super_block *super_for_commit;
821 struct super_block *sb;
822 struct inode *btree_inode;
823 struct mutex tree_log_mutex;
824 struct mutex transaction_kthread_mutex;
825 struct mutex cleaner_mutex;
826 struct mutex chunk_mutex;
827 struct mutex volume_mutex;
830 * this is taken to make sure we don't set block groups ro after
831 * the free space cache has been allocated on them
833 struct mutex ro_block_group_mutex;
835 /* this is used during read/modify/write to make sure
836 * no two ios are trying to mod the same stripe at the same
839 struct btrfs_stripe_hash_table *stripe_hash_table;
842 * this protects the ordered operations list only while we are
843 * processing all of the entries on it. This way we make
844 * sure the commit code doesn't find the list temporarily empty
845 * because another function happens to be doing non-waiting preflush
846 * before jumping into the main commit.
848 struct mutex ordered_operations_mutex;
850 struct rw_semaphore commit_root_sem;
852 struct rw_semaphore cleanup_work_sem;
854 struct rw_semaphore subvol_sem;
855 struct srcu_struct subvol_srcu;
857 spinlock_t trans_lock;
859 * the reloc mutex goes with the trans lock, it is taken
860 * during commit to protect us from the relocation code
862 struct mutex reloc_mutex;
864 struct list_head trans_list;
865 struct list_head dead_roots;
866 struct list_head caching_block_groups;
868 spinlock_t delayed_iput_lock;
869 struct list_head delayed_iputs;
870 struct mutex cleaner_delayed_iput_mutex;
872 /* this protects tree_mod_seq_list */
873 spinlock_t tree_mod_seq_lock;
874 atomic64_t tree_mod_seq;
875 struct list_head tree_mod_seq_list;
877 /* this protects tree_mod_log */
878 rwlock_t tree_mod_log_lock;
879 struct rb_root tree_mod_log;
881 atomic_t nr_async_submits;
882 atomic_t async_submit_draining;
883 atomic_t nr_async_bios;
884 atomic_t async_delalloc_pages;
885 atomic_t open_ioctl_trans;
888 * this is used to protect the following list -- ordered_roots.
890 spinlock_t ordered_root_lock;
893 * all fs/file tree roots in which there are data=ordered extents
894 * pending writeback are added into this list.
896 * these can span multiple transactions and basically include
897 * every dirty data page that isn't from nodatacow
899 struct list_head ordered_roots;
901 struct mutex delalloc_root_mutex;
902 spinlock_t delalloc_root_lock;
903 /* all fs/file tree roots that have delalloc inodes. */
904 struct list_head delalloc_roots;
907 * there is a pool of worker threads for checksumming during writes
908 * and a pool for checksumming after reads. This is because readers
909 * can run with FS locks held, and the writers may be waiting for
910 * those locks. We don't want ordering in the pending list to cause
911 * deadlocks, and so the two are serviced separately.
913 * A third pool does submit_bio to avoid deadlocking with the other
916 struct btrfs_workqueue *workers;
917 struct btrfs_workqueue *delalloc_workers;
918 struct btrfs_workqueue *flush_workers;
919 struct btrfs_workqueue *endio_workers;
920 struct btrfs_workqueue *endio_meta_workers;
921 struct btrfs_workqueue *endio_raid56_workers;
922 struct btrfs_workqueue *endio_repair_workers;
923 struct btrfs_workqueue *rmw_workers;
924 struct btrfs_workqueue *endio_meta_write_workers;
925 struct btrfs_workqueue *endio_write_workers;
926 struct btrfs_workqueue *endio_freespace_worker;
927 struct btrfs_workqueue *submit_workers;
928 struct btrfs_workqueue *caching_workers;
929 struct btrfs_workqueue *readahead_workers;
932 * fixup workers take dirty pages that didn't properly go through
933 * the cow mechanism and make them safe to write. It happens
934 * for the sys_munmap function call path
936 struct btrfs_workqueue *fixup_workers;
937 struct btrfs_workqueue *delayed_workers;
939 /* the extent workers do delayed refs on the extent allocation tree */
940 struct btrfs_workqueue *extent_workers;
941 struct task_struct *transaction_kthread;
942 struct task_struct *cleaner_kthread;
943 int thread_pool_size;
945 struct kobject *space_info_kobj;
949 /* used to keep from writing metadata until there is a nice batch */
950 struct percpu_counter dirty_metadata_bytes;
951 struct percpu_counter delalloc_bytes;
952 s32 dirty_metadata_batch;
955 struct list_head dirty_cowonly_roots;
957 struct btrfs_fs_devices *fs_devices;
960 * the space_info list is almost entirely read only. It only changes
961 * when we add a new raid type to the FS, and that happens
962 * very rarely. RCU is used to protect it.
964 struct list_head space_info;
966 struct btrfs_space_info *data_sinfo;
968 struct reloc_control *reloc_ctl;
970 /* data_alloc_cluster is only used in ssd_spread mode */
971 struct btrfs_free_cluster data_alloc_cluster;
973 /* all metadata allocations go through this cluster */
974 struct btrfs_free_cluster meta_alloc_cluster;
976 /* auto defrag inodes go here */
977 spinlock_t defrag_inodes_lock;
978 struct rb_root defrag_inodes;
979 atomic_t defrag_running;
981 /* Used to protect avail_{data, metadata, system}_alloc_bits */
982 seqlock_t profiles_lock;
984 * these three are in extended format (availability of single
985 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
986 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
988 u64 avail_data_alloc_bits;
989 u64 avail_metadata_alloc_bits;
990 u64 avail_system_alloc_bits;
992 /* restriper state */
993 spinlock_t balance_lock;
994 struct mutex balance_mutex;
995 atomic_t balance_running;
996 atomic_t balance_pause_req;
997 atomic_t balance_cancel_req;
998 struct btrfs_balance_control *balance_ctl;
999 wait_queue_head_t balance_wait_q;
1001 unsigned data_chunk_allocations;
1002 unsigned metadata_ratio;
1006 /* private scrub information */
1007 struct mutex scrub_lock;
1008 atomic_t scrubs_running;
1009 atomic_t scrub_pause_req;
1010 atomic_t scrubs_paused;
1011 atomic_t scrub_cancel_req;
1012 wait_queue_head_t scrub_pause_wait;
1013 int scrub_workers_refcnt;
1014 struct btrfs_workqueue *scrub_workers;
1015 struct btrfs_workqueue *scrub_wr_completion_workers;
1016 struct btrfs_workqueue *scrub_nocow_workers;
1017 struct btrfs_workqueue *scrub_parity_workers;
1019 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1020 u32 check_integrity_print_mask;
1022 /* is qgroup tracking in a consistent state? */
1025 /* holds configuration and tracking. Protected by qgroup_lock */
1026 struct rb_root qgroup_tree;
1027 struct rb_root qgroup_op_tree;
1028 spinlock_t qgroup_lock;
1029 spinlock_t qgroup_op_lock;
1030 atomic_t qgroup_op_seq;
1033 * used to avoid frequently calling ulist_alloc()/ulist_free()
1034 * when doing qgroup accounting, it must be protected by qgroup_lock.
1036 struct ulist *qgroup_ulist;
1038 /* protect user change for quota operations */
1039 struct mutex qgroup_ioctl_lock;
1041 /* list of dirty qgroups to be written at next commit */
1042 struct list_head dirty_qgroups;
1044 /* used by qgroup for an efficient tree traversal */
1047 /* qgroup rescan items */
1048 struct mutex qgroup_rescan_lock; /* protects the progress item */
1049 struct btrfs_key qgroup_rescan_progress;
1050 struct btrfs_workqueue *qgroup_rescan_workers;
1051 struct completion qgroup_rescan_completion;
1052 struct btrfs_work qgroup_rescan_work;
1053 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1055 /* filesystem state */
1056 unsigned long fs_state;
1058 struct btrfs_delayed_root *delayed_root;
1060 /* readahead tree */
1061 spinlock_t reada_lock;
1062 struct radix_tree_root reada_tree;
1064 /* readahead works cnt */
1065 atomic_t reada_works_cnt;
1067 /* Extent buffer radix tree */
1068 spinlock_t buffer_lock;
1069 struct radix_tree_root buffer_radix;
1071 /* next backup root to be overwritten */
1072 int backup_root_index;
1074 /* device replace state */
1075 struct btrfs_dev_replace dev_replace;
1077 struct percpu_counter bio_counter;
1078 wait_queue_head_t replace_wait;
1080 struct semaphore uuid_tree_rescan_sem;
1082 /* Used to reclaim the metadata space in the background. */
1083 struct work_struct async_reclaim_work;
1085 spinlock_t unused_bgs_lock;
1086 struct list_head unused_bgs;
1087 struct mutex unused_bg_unpin_mutex;
1088 struct mutex delete_unused_bgs_mutex;
1090 /* For btrfs to record security options */
1091 struct security_mnt_opts security_opts;
1094 * Chunks that can't be freed yet (under a trim/discard operation)
1095 * and will be latter freed. Protected by fs_info->chunk_mutex.
1097 struct list_head pinned_chunks;
1099 /* Cached block sizes */
1105 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1107 return sb->s_fs_info;
1110 struct btrfs_subvolume_writers {
1111 struct percpu_counter counter;
1112 wait_queue_head_t wait;
1116 * The state of btrfs root
1119 * btrfs_record_root_in_trans is a multi-step process,
1120 * and it can race with the balancing code. But the
1121 * race is very small, and only the first time the root
1122 * is added to each transaction. So IN_TRANS_SETUP
1123 * is used to tell us when more checks are required
1125 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1126 #define BTRFS_ROOT_REF_COWS 1
1127 #define BTRFS_ROOT_TRACK_DIRTY 2
1128 #define BTRFS_ROOT_IN_RADIX 3
1129 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1130 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1131 #define BTRFS_ROOT_FORCE_COW 6
1132 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1133 #define BTRFS_ROOT_DIRTY 8
1136 * in ram representation of the tree. extent_root is used for all allocations
1137 * and for the extent tree extent_root root.
1140 struct extent_buffer *node;
1142 struct extent_buffer *commit_root;
1143 struct btrfs_root *log_root;
1144 struct btrfs_root *reloc_root;
1146 unsigned long state;
1147 struct btrfs_root_item root_item;
1148 struct btrfs_key root_key;
1149 struct btrfs_fs_info *fs_info;
1150 struct extent_io_tree dirty_log_pages;
1152 struct mutex objectid_mutex;
1154 spinlock_t accounting_lock;
1155 struct btrfs_block_rsv *block_rsv;
1157 /* free ino cache stuff */
1158 struct btrfs_free_space_ctl *free_ino_ctl;
1159 enum btrfs_caching_type ino_cache_state;
1160 spinlock_t ino_cache_lock;
1161 wait_queue_head_t ino_cache_wait;
1162 struct btrfs_free_space_ctl *free_ino_pinned;
1163 u64 ino_cache_progress;
1164 struct inode *ino_cache_inode;
1166 struct mutex log_mutex;
1167 wait_queue_head_t log_writer_wait;
1168 wait_queue_head_t log_commit_wait[2];
1169 struct list_head log_ctxs[2];
1170 atomic_t log_writers;
1171 atomic_t log_commit[2];
1174 /* No matter the commit succeeds or not*/
1175 int log_transid_committed;
1176 /* Just be updated when the commit succeeds. */
1177 int last_log_commit;
1178 pid_t log_start_pid;
1185 u64 highest_objectid;
1187 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1188 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1192 u64 defrag_trans_start;
1193 struct btrfs_key defrag_progress;
1194 struct btrfs_key defrag_max;
1197 /* the dirty list is only used by non-reference counted roots */
1198 struct list_head dirty_list;
1200 struct list_head root_list;
1202 spinlock_t log_extents_lock[2];
1203 struct list_head logged_list[2];
1205 spinlock_t orphan_lock;
1206 atomic_t orphan_inodes;
1207 struct btrfs_block_rsv *orphan_block_rsv;
1208 int orphan_cleanup_state;
1210 spinlock_t inode_lock;
1211 /* red-black tree that keeps track of in-memory inodes */
1212 struct rb_root inode_tree;
1215 * radix tree that keeps track of delayed nodes of every inode,
1216 * protected by inode_lock
1218 struct radix_tree_root delayed_nodes_tree;
1220 * right now this just gets used so that a root has its own devid
1221 * for stat. It may be used for more later
1225 spinlock_t root_item_lock;
1228 struct mutex delalloc_mutex;
1229 spinlock_t delalloc_lock;
1231 * all of the inodes that have delalloc bytes. It is possible for
1232 * this list to be empty even when there is still dirty data=ordered
1233 * extents waiting to finish IO.
1235 struct list_head delalloc_inodes;
1236 struct list_head delalloc_root;
1237 u64 nr_delalloc_inodes;
1239 struct mutex ordered_extent_mutex;
1241 * this is used by the balancing code to wait for all the pending
1244 spinlock_t ordered_extent_lock;
1247 * all of the data=ordered extents pending writeback
1248 * these can span multiple transactions and basically include
1249 * every dirty data page that isn't from nodatacow
1251 struct list_head ordered_extents;
1252 struct list_head ordered_root;
1253 u64 nr_ordered_extents;
1256 * Number of currently running SEND ioctls to prevent
1257 * manipulation with the read-only status via SUBVOL_SETFLAGS
1259 int send_in_progress;
1260 struct btrfs_subvolume_writers *subv_writers;
1261 atomic_t will_be_snapshotted;
1263 /* For qgroup metadata space reserve */
1264 atomic64_t qgroup_meta_rsv;
1267 struct btrfs_file_private {
1268 struct btrfs_trans_handle *trans;
1272 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1274 return btrfs_sb(inode->i_sb)->sectorsize;
1277 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1280 return info->nodesize - sizeof(struct btrfs_header);
1283 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1285 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1287 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1290 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1292 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1295 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1296 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1297 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1299 return BTRFS_MAX_ITEM_SIZE(info) -
1300 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1303 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1305 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1309 * Flags for mount options.
1311 * Note: don't forget to add new options to btrfs_show_options()
1313 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1314 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1315 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1316 #define BTRFS_MOUNT_SSD (1 << 3)
1317 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1318 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1319 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1320 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1321 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1322 #define BTRFS_MOUNT_NOSSD (1 << 9)
1323 #define BTRFS_MOUNT_DISCARD (1 << 10)
1324 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1325 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1326 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1327 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1328 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1329 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1330 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1331 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1332 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1333 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1334 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1335 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1336 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1337 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1338 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1339 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1340 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1342 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1343 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1345 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1346 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1347 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1348 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1351 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1353 if (!btrfs_test_opt(fs_info, opt)) \
1354 btrfs_info(fs_info, fmt, ##args); \
1355 btrfs_set_opt(fs_info->mount_opt, opt); \
1358 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1360 if (btrfs_test_opt(fs_info, opt)) \
1361 btrfs_info(fs_info, fmt, ##args); \
1362 btrfs_clear_opt(fs_info->mount_opt, opt); \
1365 #ifdef CONFIG_BTRFS_DEBUG
1367 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1369 struct btrfs_fs_info *fs_info = block_group->fs_info;
1371 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1372 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1373 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1374 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1379 * Requests for changes that need to be done during transaction commit.
1381 * Internal mount options that are used for special handling of the real
1382 * mount options (eg. cannot be set during remount and have to be set during
1383 * transaction commit)
1386 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1387 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1388 #define BTRFS_PENDING_COMMIT (2)
1390 #define btrfs_test_pending(info, opt) \
1391 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1392 #define btrfs_set_pending(info, opt) \
1393 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1394 #define btrfs_clear_pending(info, opt) \
1395 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1398 * Helpers for setting pending mount option changes.
1400 * Expects corresponding macros
1401 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1403 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1405 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1406 btrfs_info((info), fmt, ##args); \
1407 btrfs_set_pending((info), SET_##opt); \
1408 btrfs_clear_pending((info), CLEAR_##opt); \
1412 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1414 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1415 btrfs_info((info), fmt, ##args); \
1416 btrfs_set_pending((info), CLEAR_##opt); \
1417 btrfs_clear_pending((info), SET_##opt); \
1424 #define BTRFS_INODE_NODATASUM (1 << 0)
1425 #define BTRFS_INODE_NODATACOW (1 << 1)
1426 #define BTRFS_INODE_READONLY (1 << 2)
1427 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1428 #define BTRFS_INODE_PREALLOC (1 << 4)
1429 #define BTRFS_INODE_SYNC (1 << 5)
1430 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1431 #define BTRFS_INODE_APPEND (1 << 7)
1432 #define BTRFS_INODE_NODUMP (1 << 8)
1433 #define BTRFS_INODE_NOATIME (1 << 9)
1434 #define BTRFS_INODE_DIRSYNC (1 << 10)
1435 #define BTRFS_INODE_COMPRESS (1 << 11)
1437 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1439 struct btrfs_map_token {
1440 const struct extent_buffer *eb;
1442 unsigned long offset;
1445 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1446 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1448 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1450 token->kaddr = NULL;
1453 /* some macros to generate set/get functions for the struct fields. This
1454 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1457 #define le8_to_cpu(v) (v)
1458 #define cpu_to_le8(v) (v)
1461 #define read_eb_member(eb, ptr, type, member, result) (\
1462 read_extent_buffer(eb, (char *)(result), \
1463 ((unsigned long)(ptr)) + \
1464 offsetof(type, member), \
1465 sizeof(((type *)0)->member)))
1467 #define write_eb_member(eb, ptr, type, member, result) (\
1468 write_extent_buffer(eb, (char *)(result), \
1469 ((unsigned long)(ptr)) + \
1470 offsetof(type, member), \
1471 sizeof(((type *)0)->member)))
1473 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1474 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1475 const void *ptr, unsigned long off, \
1476 struct btrfs_map_token *token); \
1477 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1478 unsigned long off, u##bits val, \
1479 struct btrfs_map_token *token); \
1480 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1482 unsigned long off) \
1484 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1486 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1487 unsigned long off, u##bits val) \
1489 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1492 DECLARE_BTRFS_SETGET_BITS(8)
1493 DECLARE_BTRFS_SETGET_BITS(16)
1494 DECLARE_BTRFS_SETGET_BITS(32)
1495 DECLARE_BTRFS_SETGET_BITS(64)
1497 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1498 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1501 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1502 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1504 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1507 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1508 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1510 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1512 struct btrfs_map_token *token) \
1514 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1515 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1517 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1518 type *s, u##bits val, \
1519 struct btrfs_map_token *token) \
1521 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1522 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1525 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1526 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1528 const type *p = page_address(eb->pages[0]); \
1529 u##bits res = le##bits##_to_cpu(p->member); \
1532 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1535 type *p = page_address(eb->pages[0]); \
1536 p->member = cpu_to_le##bits(val); \
1539 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1540 static inline u##bits btrfs_##name(const type *s) \
1542 return le##bits##_to_cpu(s->member); \
1544 static inline void btrfs_set_##name(type *s, u##bits val) \
1546 s->member = cpu_to_le##bits(val); \
1550 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1551 struct btrfs_dev_item *s)
1553 BUILD_BUG_ON(sizeof(u64) !=
1554 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1555 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1558 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1559 struct btrfs_dev_item *s,
1562 BUILD_BUG_ON(sizeof(u64) !=
1563 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1564 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1565 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1569 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1570 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1571 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1572 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1573 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1575 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1576 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1577 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1578 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1579 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1580 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1582 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1583 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1585 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1587 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1589 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1591 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1593 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1594 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1596 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1598 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1600 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1603 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1605 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1608 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1610 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1613 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1614 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1615 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1616 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1617 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1618 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1619 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1620 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1621 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1622 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1623 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1625 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1627 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1630 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1631 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1632 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1634 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1636 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1638 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1640 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1641 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1643 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1645 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1646 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1648 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1651 unsigned long offset = (unsigned long)c;
1652 offset += offsetof(struct btrfs_chunk, stripe);
1653 offset += nr * sizeof(struct btrfs_stripe);
1654 return (struct btrfs_stripe *)offset;
1657 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1659 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1662 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1663 struct btrfs_chunk *c, int nr)
1665 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1668 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1669 struct btrfs_chunk *c, int nr)
1671 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1674 /* struct btrfs_block_group_item */
1675 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1677 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1679 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1680 struct btrfs_block_group_item, chunk_objectid, 64);
1682 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1683 struct btrfs_block_group_item, chunk_objectid, 64);
1684 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1685 struct btrfs_block_group_item, flags, 64);
1686 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1687 struct btrfs_block_group_item, flags, 64);
1689 /* struct btrfs_free_space_info */
1690 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1692 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1694 /* struct btrfs_inode_ref */
1695 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1696 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1698 /* struct btrfs_inode_extref */
1699 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1700 parent_objectid, 64);
1701 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1703 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1705 /* struct btrfs_inode_item */
1706 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1707 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1708 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1709 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1710 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1711 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1712 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1713 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1714 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1715 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1716 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1717 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1718 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1720 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1722 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1724 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1725 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1727 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1729 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1730 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1731 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1732 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1733 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1734 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1735 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1736 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1737 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1738 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1740 /* struct btrfs_dev_extent */
1741 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1743 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1744 chunk_objectid, 64);
1745 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1747 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1749 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1751 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1752 return (unsigned long)dev + ptr;
1755 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1756 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1758 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1760 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1763 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1765 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1766 struct btrfs_tree_block_info *item,
1767 struct btrfs_disk_key *key)
1769 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1772 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1773 struct btrfs_tree_block_info *item,
1774 struct btrfs_disk_key *key)
1776 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1779 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1781 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1783 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1785 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1788 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1791 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1793 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1796 static inline u32 btrfs_extent_inline_ref_size(int type)
1798 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1799 type == BTRFS_SHARED_BLOCK_REF_KEY)
1800 return sizeof(struct btrfs_extent_inline_ref);
1801 if (type == BTRFS_SHARED_DATA_REF_KEY)
1802 return sizeof(struct btrfs_shared_data_ref) +
1803 sizeof(struct btrfs_extent_inline_ref);
1804 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1805 return sizeof(struct btrfs_extent_data_ref) +
1806 offsetof(struct btrfs_extent_inline_ref, offset);
1811 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1812 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1814 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1815 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1817 /* struct btrfs_node */
1818 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1819 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1820 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1822 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1825 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1828 ptr = offsetof(struct btrfs_node, ptrs) +
1829 sizeof(struct btrfs_key_ptr) * nr;
1830 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1833 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1837 ptr = offsetof(struct btrfs_node, ptrs) +
1838 sizeof(struct btrfs_key_ptr) * nr;
1839 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1842 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1845 ptr = offsetof(struct btrfs_node, ptrs) +
1846 sizeof(struct btrfs_key_ptr) * nr;
1847 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1850 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1854 ptr = offsetof(struct btrfs_node, ptrs) +
1855 sizeof(struct btrfs_key_ptr) * nr;
1856 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1859 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1861 return offsetof(struct btrfs_node, ptrs) +
1862 sizeof(struct btrfs_key_ptr) * nr;
1865 void btrfs_node_key(const struct extent_buffer *eb,
1866 struct btrfs_disk_key *disk_key, int nr);
1868 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1869 struct btrfs_disk_key *disk_key, int nr)
1872 ptr = btrfs_node_key_ptr_offset(nr);
1873 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1874 struct btrfs_key_ptr, key, disk_key);
1877 /* struct btrfs_item */
1878 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1879 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1880 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1881 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1883 static inline unsigned long btrfs_item_nr_offset(int nr)
1885 return offsetof(struct btrfs_leaf, items) +
1886 sizeof(struct btrfs_item) * nr;
1889 static inline struct btrfs_item *btrfs_item_nr(int nr)
1891 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1894 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1895 struct btrfs_item *item)
1897 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1900 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1902 return btrfs_item_end(eb, btrfs_item_nr(nr));
1905 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1907 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1910 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1912 return btrfs_item_size(eb, btrfs_item_nr(nr));
1915 static inline void btrfs_item_key(const struct extent_buffer *eb,
1916 struct btrfs_disk_key *disk_key, int nr)
1918 struct btrfs_item *item = btrfs_item_nr(nr);
1919 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1922 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1923 struct btrfs_disk_key *disk_key, int nr)
1925 struct btrfs_item *item = btrfs_item_nr(nr);
1926 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1929 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1932 * struct btrfs_root_ref
1934 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1935 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1936 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1938 /* struct btrfs_dir_item */
1939 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1940 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1941 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1942 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1943 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1944 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1946 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1948 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1951 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1952 const struct btrfs_dir_item *item,
1953 struct btrfs_disk_key *key)
1955 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1958 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1959 struct btrfs_dir_item *item,
1960 const struct btrfs_disk_key *key)
1962 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1965 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1967 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1969 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1972 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1973 const struct btrfs_free_space_header *h,
1974 struct btrfs_disk_key *key)
1976 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1979 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1980 struct btrfs_free_space_header *h,
1981 const struct btrfs_disk_key *key)
1983 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1986 /* struct btrfs_disk_key */
1987 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1989 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1990 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1992 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1993 const struct btrfs_disk_key *disk)
1995 cpu->offset = le64_to_cpu(disk->offset);
1996 cpu->type = disk->type;
1997 cpu->objectid = le64_to_cpu(disk->objectid);
2000 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2001 const struct btrfs_key *cpu)
2003 disk->offset = cpu_to_le64(cpu->offset);
2004 disk->type = cpu->type;
2005 disk->objectid = cpu_to_le64(cpu->objectid);
2008 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2009 struct btrfs_key *key, int nr)
2011 struct btrfs_disk_key disk_key;
2012 btrfs_node_key(eb, &disk_key, nr);
2013 btrfs_disk_key_to_cpu(key, &disk_key);
2016 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2017 struct btrfs_key *key, int nr)
2019 struct btrfs_disk_key disk_key;
2020 btrfs_item_key(eb, &disk_key, nr);
2021 btrfs_disk_key_to_cpu(key, &disk_key);
2024 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2025 const struct btrfs_dir_item *item,
2026 struct btrfs_key *key)
2028 struct btrfs_disk_key disk_key;
2029 btrfs_dir_item_key(eb, item, &disk_key);
2030 btrfs_disk_key_to_cpu(key, &disk_key);
2033 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2038 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2043 /* struct btrfs_header */
2044 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2045 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2047 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2048 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2049 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2050 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2051 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2053 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2054 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2056 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2058 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2060 return (btrfs_header_flags(eb) & flag) == flag;
2063 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2065 u64 flags = btrfs_header_flags(eb);
2066 btrfs_set_header_flags(eb, flags | flag);
2067 return (flags & flag) == flag;
2070 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2072 u64 flags = btrfs_header_flags(eb);
2073 btrfs_set_header_flags(eb, flags & ~flag);
2074 return (flags & flag) == flag;
2077 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2079 u64 flags = btrfs_header_flags(eb);
2080 return flags >> BTRFS_BACKREF_REV_SHIFT;
2083 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2086 u64 flags = btrfs_header_flags(eb);
2087 flags &= ~BTRFS_BACKREF_REV_MASK;
2088 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2089 btrfs_set_header_flags(eb, flags);
2092 static inline unsigned long btrfs_header_fsid(void)
2094 return offsetof(struct btrfs_header, fsid);
2097 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2099 return offsetof(struct btrfs_header, chunk_tree_uuid);
2102 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2104 return btrfs_header_level(eb) == 0;
2107 /* struct btrfs_root_item */
2108 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2110 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2111 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2112 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2114 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2116 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2117 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2118 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2119 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2120 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2121 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2122 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2123 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2125 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2127 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2129 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2131 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2133 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2136 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2138 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2141 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2143 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2146 /* struct btrfs_root_backup */
2147 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2149 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2151 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2152 tree_root_level, 8);
2154 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2156 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2157 chunk_root_gen, 64);
2158 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2159 chunk_root_level, 8);
2161 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2163 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2164 extent_root_gen, 64);
2165 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2166 extent_root_level, 8);
2168 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2170 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2172 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2175 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2177 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2179 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2182 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2184 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2186 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2187 csum_root_level, 8);
2188 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2190 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2192 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2195 /* struct btrfs_balance_item */
2196 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2198 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2199 const struct btrfs_balance_item *bi,
2200 struct btrfs_disk_balance_args *ba)
2202 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2205 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2206 struct btrfs_balance_item *bi,
2207 const struct btrfs_disk_balance_args *ba)
2209 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2212 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2213 const struct btrfs_balance_item *bi,
2214 struct btrfs_disk_balance_args *ba)
2216 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2219 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2220 struct btrfs_balance_item *bi,
2221 const struct btrfs_disk_balance_args *ba)
2223 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2226 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2227 const struct btrfs_balance_item *bi,
2228 struct btrfs_disk_balance_args *ba)
2230 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2233 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2234 struct btrfs_balance_item *bi,
2235 const struct btrfs_disk_balance_args *ba)
2237 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2241 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2242 const struct btrfs_disk_balance_args *disk)
2244 memset(cpu, 0, sizeof(*cpu));
2246 cpu->profiles = le64_to_cpu(disk->profiles);
2247 cpu->usage = le64_to_cpu(disk->usage);
2248 cpu->devid = le64_to_cpu(disk->devid);
2249 cpu->pstart = le64_to_cpu(disk->pstart);
2250 cpu->pend = le64_to_cpu(disk->pend);
2251 cpu->vstart = le64_to_cpu(disk->vstart);
2252 cpu->vend = le64_to_cpu(disk->vend);
2253 cpu->target = le64_to_cpu(disk->target);
2254 cpu->flags = le64_to_cpu(disk->flags);
2255 cpu->limit = le64_to_cpu(disk->limit);
2256 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2257 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2261 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2262 const struct btrfs_balance_args *cpu)
2264 memset(disk, 0, sizeof(*disk));
2266 disk->profiles = cpu_to_le64(cpu->profiles);
2267 disk->usage = cpu_to_le64(cpu->usage);
2268 disk->devid = cpu_to_le64(cpu->devid);
2269 disk->pstart = cpu_to_le64(cpu->pstart);
2270 disk->pend = cpu_to_le64(cpu->pend);
2271 disk->vstart = cpu_to_le64(cpu->vstart);
2272 disk->vend = cpu_to_le64(cpu->vend);
2273 disk->target = cpu_to_le64(cpu->target);
2274 disk->flags = cpu_to_le64(cpu->flags);
2275 disk->limit = cpu_to_le64(cpu->limit);
2276 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2277 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2280 /* struct btrfs_super_block */
2281 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2282 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2283 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2285 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2286 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2287 struct btrfs_super_block, sys_chunk_array_size, 32);
2288 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2289 struct btrfs_super_block, chunk_root_generation, 64);
2290 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2292 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2294 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2295 chunk_root_level, 8);
2296 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2298 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2299 log_root_transid, 64);
2300 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2302 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2304 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2306 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2308 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2310 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2312 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2313 root_dir_objectid, 64);
2314 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2316 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2318 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2319 compat_ro_flags, 64);
2320 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2321 incompat_flags, 64);
2322 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2324 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2325 cache_generation, 64);
2326 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2327 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2328 uuid_tree_generation, 64);
2330 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2332 u16 t = btrfs_super_csum_type(s);
2334 * csum type is validated at mount time
2336 return btrfs_csum_sizes[t];
2341 * The leaf data grows from end-to-front in the node.
2342 * this returns the address of the start of the last item,
2343 * which is the stop of the leaf data stack
2345 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
2346 const struct extent_buffer *leaf)
2348 u32 nr = btrfs_header_nritems(leaf);
2351 return BTRFS_LEAF_DATA_SIZE(fs_info);
2352 return btrfs_item_offset_nr(leaf, nr - 1);
2355 /* struct btrfs_file_extent_item */
2356 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2357 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2358 struct btrfs_file_extent_item, disk_bytenr, 64);
2359 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2360 struct btrfs_file_extent_item, offset, 64);
2361 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2362 struct btrfs_file_extent_item, generation, 64);
2363 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2364 struct btrfs_file_extent_item, num_bytes, 64);
2365 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2366 struct btrfs_file_extent_item, disk_num_bytes, 64);
2367 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2368 struct btrfs_file_extent_item, compression, 8);
2370 static inline unsigned long
2371 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2373 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2376 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2378 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2381 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2383 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2385 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2386 disk_num_bytes, 64);
2387 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2389 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2391 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2393 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2395 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2397 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2398 other_encoding, 16);
2401 * this returns the number of bytes used by the item on disk, minus the
2402 * size of any extent headers. If a file is compressed on disk, this is
2403 * the compressed size
2405 static inline u32 btrfs_file_extent_inline_item_len(
2406 const struct extent_buffer *eb,
2407 struct btrfs_item *e)
2409 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2412 /* this returns the number of file bytes represented by the inline item.
2413 * If an item is compressed, this is the uncompressed size
2415 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb,
2417 const struct btrfs_file_extent_item *fi)
2419 struct btrfs_map_token token;
2421 btrfs_init_map_token(&token);
2423 * return the space used on disk if this item isn't
2424 * compressed or encoded
2426 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
2427 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
2428 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
2429 return btrfs_file_extent_inline_item_len(eb,
2430 btrfs_item_nr(slot));
2433 /* otherwise use the ram bytes field */
2434 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
2438 /* btrfs_dev_stats_item */
2439 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2440 const struct btrfs_dev_stats_item *ptr,
2445 read_extent_buffer(eb, &val,
2446 offsetof(struct btrfs_dev_stats_item, values) +
2447 ((unsigned long)ptr) + (index * sizeof(u64)),
2452 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2453 struct btrfs_dev_stats_item *ptr,
2456 write_extent_buffer(eb, &val,
2457 offsetof(struct btrfs_dev_stats_item, values) +
2458 ((unsigned long)ptr) + (index * sizeof(u64)),
2462 /* btrfs_qgroup_status_item */
2463 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2465 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2467 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2469 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2472 /* btrfs_qgroup_info_item */
2473 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2475 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2476 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2478 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2479 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2482 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2483 struct btrfs_qgroup_info_item, generation, 64);
2484 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2486 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2487 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2488 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2490 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2491 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2493 /* btrfs_qgroup_limit_item */
2494 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2496 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2498 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2500 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2502 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2505 /* btrfs_dev_replace_item */
2506 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2507 struct btrfs_dev_replace_item, src_devid, 64);
2508 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2509 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2511 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2513 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2515 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2517 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2518 num_write_errors, 64);
2519 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2520 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2522 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2524 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2528 struct btrfs_dev_replace_item, src_devid, 64);
2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2530 struct btrfs_dev_replace_item,
2531 cont_reading_from_srcdev_mode, 64);
2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2533 struct btrfs_dev_replace_item, replace_state, 64);
2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2535 struct btrfs_dev_replace_item, time_started, 64);
2536 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2537 struct btrfs_dev_replace_item, time_stopped, 64);
2538 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2539 struct btrfs_dev_replace_item, num_write_errors, 64);
2540 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2541 struct btrfs_dev_replace_item,
2542 num_uncorrectable_read_errors, 64);
2543 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2544 struct btrfs_dev_replace_item, cursor_left, 64);
2545 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2546 struct btrfs_dev_replace_item, cursor_right, 64);
2548 /* helper function to cast into the data area of the leaf. */
2549 #define btrfs_item_ptr(leaf, slot, type) \
2550 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2551 btrfs_item_offset_nr(leaf, slot)))
2553 #define btrfs_item_ptr_offset(leaf, slot) \
2554 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2555 btrfs_item_offset_nr(leaf, slot)))
2557 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2559 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2560 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2563 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2565 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2570 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2572 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2575 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2579 * Doing a truncate won't result in new nodes or leaves, just what we need for
2582 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2585 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2588 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2589 struct btrfs_fs_info *fs_info);
2590 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2591 struct btrfs_fs_info *fs_info);
2592 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2594 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2595 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2596 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2597 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2598 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2599 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2600 struct btrfs_fs_info *fs_info, unsigned long count);
2601 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
2602 unsigned long count, u64 transid, int wait);
2603 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2604 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2605 struct btrfs_fs_info *fs_info, u64 bytenr,
2606 u64 offset, int metadata, u64 *refs, u64 *flags);
2607 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2608 u64 bytenr, u64 num, int reserved);
2609 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2610 u64 bytenr, u64 num_bytes);
2611 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
2612 struct extent_buffer *eb);
2613 int btrfs_cross_ref_exist(struct btrfs_root *root,
2614 u64 objectid, u64 offset, u64 bytenr);
2615 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2616 struct btrfs_fs_info *info,
2618 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2619 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2620 int get_block_group_index(struct btrfs_block_group_cache *cache);
2621 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2622 struct btrfs_root *root,
2623 u64 parent, u64 root_objectid,
2624 const struct btrfs_disk_key *key,
2625 int level, u64 hint,
2627 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2628 struct btrfs_root *root,
2629 struct extent_buffer *buf,
2630 u64 parent, int last_ref);
2631 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2632 u64 root_objectid, u64 owner,
2633 u64 offset, u64 ram_bytes,
2634 struct btrfs_key *ins);
2635 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2636 struct btrfs_fs_info *fs_info,
2637 u64 root_objectid, u64 owner, u64 offset,
2638 struct btrfs_key *ins);
2639 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2640 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2641 struct btrfs_key *ins, int is_data, int delalloc);
2642 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2643 struct extent_buffer *buf, int full_backref);
2644 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2645 struct extent_buffer *buf, int full_backref);
2646 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2647 struct btrfs_fs_info *fs_info,
2648 u64 bytenr, u64 num_bytes, u64 flags,
2649 int level, int is_data);
2650 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2651 struct btrfs_fs_info *fs_info,
2652 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2653 u64 owner, u64 offset);
2655 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2656 u64 start, u64 len, int delalloc);
2657 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2658 u64 start, u64 len);
2659 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2660 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2661 struct btrfs_fs_info *fs_info);
2662 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2663 struct btrfs_fs_info *fs_info,
2664 u64 bytenr, u64 num_bytes, u64 parent,
2665 u64 root_objectid, u64 owner, u64 offset);
2667 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
2668 struct btrfs_fs_info *fs_info);
2669 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2670 struct btrfs_fs_info *fs_info);
2671 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2672 struct btrfs_fs_info *fs_info);
2673 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2674 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2675 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2676 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2677 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2678 struct btrfs_fs_info *fs_info, u64 bytes_used,
2679 u64 type, u64 chunk_offset, u64 size);
2680 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2681 struct btrfs_fs_info *fs_info,
2682 const u64 chunk_offset);
2683 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2684 struct btrfs_fs_info *fs_info, u64 group_start,
2685 struct extent_map *em);
2686 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2687 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2688 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2689 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
2690 struct btrfs_fs_info *fs_info);
2691 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2692 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2693 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2694 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2696 enum btrfs_reserve_flush_enum {
2697 /* If we are in the transaction, we can't flush anything.*/
2698 BTRFS_RESERVE_NO_FLUSH,
2700 * Flushing delalloc may cause deadlock somewhere, in this
2701 * case, use FLUSH LIMIT
2703 BTRFS_RESERVE_FLUSH_LIMIT,
2704 BTRFS_RESERVE_FLUSH_ALL,
2707 enum btrfs_flush_state {
2708 FLUSH_DELAYED_ITEMS_NR = 1,
2709 FLUSH_DELAYED_ITEMS = 2,
2711 FLUSH_DELALLOC_WAIT = 4,
2716 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
2717 int btrfs_check_data_free_space(struct inode *inode,
2718 struct extent_changeset **reserved, u64 start, u64 len);
2719 void btrfs_free_reserved_data_space(struct inode *inode,
2720 struct extent_changeset *reserved, u64 start, u64 len);
2721 void btrfs_delalloc_release_space(struct inode *inode,
2722 struct extent_changeset *reserved, u64 start, u64 len);
2723 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2725 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2726 struct btrfs_fs_info *fs_info);
2727 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2728 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2729 struct btrfs_inode *inode);
2730 void btrfs_orphan_release_metadata(struct btrfs_inode *inode);
2731 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2732 struct btrfs_block_rsv *rsv,
2734 u64 *qgroup_reserved, bool use_global_rsv);
2735 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2736 struct btrfs_block_rsv *rsv);
2737 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2738 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes);
2739 int btrfs_delalloc_reserve_space(struct inode *inode,
2740 struct extent_changeset **reserved, u64 start, u64 len);
2741 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2742 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
2743 unsigned short type);
2744 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
2745 struct btrfs_block_rsv *rsv);
2746 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
2747 int btrfs_block_rsv_add(struct btrfs_root *root,
2748 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2749 enum btrfs_reserve_flush_enum flush);
2750 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
2751 int btrfs_block_rsv_refill(struct btrfs_root *root,
2752 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2753 enum btrfs_reserve_flush_enum flush);
2754 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2755 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2757 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2758 struct btrfs_block_rsv *dest, u64 num_bytes,
2760 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
2761 struct btrfs_block_rsv *block_rsv,
2763 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info,
2764 struct btrfs_block_group_cache *cache);
2765 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2766 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2767 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2768 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2769 u64 start, u64 end);
2770 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2771 u64 num_bytes, u64 *actual_bytes);
2772 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2773 struct btrfs_fs_info *fs_info, u64 type);
2774 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2776 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2777 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2778 struct btrfs_fs_info *fs_info);
2779 int __get_raid_index(u64 flags);
2780 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2781 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2782 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2783 void check_system_chunk(struct btrfs_trans_handle *trans,
2784 struct btrfs_fs_info *fs_info, const u64 type);
2785 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2786 struct btrfs_fs_info *info, u64 start, u64 end);
2789 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2790 int level, int *slot);
2791 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2792 int btrfs_previous_item(struct btrfs_root *root,
2793 struct btrfs_path *path, u64 min_objectid,
2795 int btrfs_previous_extent_item(struct btrfs_root *root,
2796 struct btrfs_path *path, u64 min_objectid);
2797 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2798 struct btrfs_path *path,
2799 const struct btrfs_key *new_key);
2800 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2801 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2802 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2803 struct btrfs_key *key, int lowest_level,
2805 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2806 struct btrfs_path *path,
2808 enum btrfs_compare_tree_result {
2809 BTRFS_COMPARE_TREE_NEW,
2810 BTRFS_COMPARE_TREE_DELETED,
2811 BTRFS_COMPARE_TREE_CHANGED,
2812 BTRFS_COMPARE_TREE_SAME,
2814 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
2815 struct btrfs_root *right_root,
2816 struct btrfs_path *left_path,
2817 struct btrfs_path *right_path,
2818 struct btrfs_key *key,
2819 enum btrfs_compare_tree_result result,
2821 int btrfs_compare_trees(struct btrfs_root *left_root,
2822 struct btrfs_root *right_root,
2823 btrfs_changed_cb_t cb, void *ctx);
2824 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2825 struct btrfs_root *root, struct extent_buffer *buf,
2826 struct extent_buffer *parent, int parent_slot,
2827 struct extent_buffer **cow_ret);
2828 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2829 struct btrfs_root *root,
2830 struct extent_buffer *buf,
2831 struct extent_buffer **cow_ret, u64 new_root_objectid);
2832 int btrfs_block_can_be_shared(struct btrfs_root *root,
2833 struct extent_buffer *buf);
2834 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
2836 void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
2837 struct btrfs_path *path, u32 new_size, int from_end);
2838 int btrfs_split_item(struct btrfs_trans_handle *trans,
2839 struct btrfs_root *root,
2840 struct btrfs_path *path,
2841 const struct btrfs_key *new_key,
2842 unsigned long split_offset);
2843 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2844 struct btrfs_root *root,
2845 struct btrfs_path *path,
2846 const struct btrfs_key *new_key);
2847 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2848 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2849 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2850 const struct btrfs_key *key, struct btrfs_path *p,
2851 int ins_len, int cow);
2852 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2853 struct btrfs_path *p, u64 time_seq);
2854 int btrfs_search_slot_for_read(struct btrfs_root *root,
2855 const struct btrfs_key *key,
2856 struct btrfs_path *p, int find_higher,
2858 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2859 struct btrfs_root *root, struct extent_buffer *parent,
2860 int start_slot, u64 *last_ret,
2861 struct btrfs_key *progress);
2862 void btrfs_release_path(struct btrfs_path *p);
2863 struct btrfs_path *btrfs_alloc_path(void);
2864 void btrfs_free_path(struct btrfs_path *p);
2865 void btrfs_set_path_blocking(struct btrfs_path *p);
2866 void btrfs_clear_path_blocking(struct btrfs_path *p,
2867 struct extent_buffer *held, int held_rw);
2868 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2870 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2871 struct btrfs_path *path, int slot, int nr);
2872 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2873 struct btrfs_root *root,
2874 struct btrfs_path *path)
2876 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2879 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2880 const struct btrfs_key *cpu_key, u32 *data_size,
2881 u32 total_data, u32 total_size, int nr);
2882 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2883 const struct btrfs_key *key, void *data, u32 data_size);
2884 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2885 struct btrfs_root *root,
2886 struct btrfs_path *path,
2887 const struct btrfs_key *cpu_key, u32 *data_size,
2890 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2891 struct btrfs_root *root,
2892 struct btrfs_path *path,
2893 const struct btrfs_key *key,
2896 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2899 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2900 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2901 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2903 static inline int btrfs_next_old_item(struct btrfs_root *root,
2904 struct btrfs_path *p, u64 time_seq)
2907 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2908 return btrfs_next_old_leaf(root, p, time_seq);
2911 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2913 return btrfs_next_old_item(root, p, 0);
2915 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
2916 struct extent_buffer *leaf);
2917 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2918 struct btrfs_block_rsv *block_rsv,
2919 int update_ref, int for_reloc);
2920 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2921 struct btrfs_root *root,
2922 struct extent_buffer *node,
2923 struct extent_buffer *parent);
2924 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2927 * Do it this way so we only ever do one test_bit in the normal case.
2929 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2930 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2938 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2939 * anything except sleeping. This function is used to check the status of
2942 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2944 return fs_info->sb->s_flags & MS_RDONLY || btrfs_fs_closing(fs_info);
2947 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2949 kfree(fs_info->balance_ctl);
2950 kfree(fs_info->delayed_root);
2951 kfree(fs_info->extent_root);
2952 kfree(fs_info->tree_root);
2953 kfree(fs_info->chunk_root);
2954 kfree(fs_info->dev_root);
2955 kfree(fs_info->csum_root);
2956 kfree(fs_info->quota_root);
2957 kfree(fs_info->uuid_root);
2958 kfree(fs_info->free_space_root);
2959 kfree(fs_info->super_copy);
2960 kfree(fs_info->super_for_commit);
2961 security_free_mnt_opts(&fs_info->security_opts);
2965 /* tree mod log functions from ctree.c */
2966 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2967 struct seq_list *elem);
2968 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2969 struct seq_list *elem);
2970 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2973 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2974 struct btrfs_fs_info *fs_info,
2975 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2976 const char *name, int name_len);
2977 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2978 struct btrfs_fs_info *fs_info,
2979 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2980 const char *name, int name_len);
2981 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2982 const struct btrfs_key *key);
2983 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2984 const struct btrfs_key *key,
2985 struct btrfs_root_item *item);
2986 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2987 struct btrfs_root *root,
2988 struct btrfs_key *key,
2989 struct btrfs_root_item *item);
2990 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2991 struct btrfs_path *path, struct btrfs_root_item *root_item,
2992 struct btrfs_key *root_key);
2993 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2994 void btrfs_set_root_node(struct btrfs_root_item *item,
2995 struct extent_buffer *node);
2996 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2997 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2998 struct btrfs_root *root);
3001 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
3002 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
3004 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
3005 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
3007 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3008 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3012 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3013 const char *name, int name_len);
3014 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
3015 struct btrfs_root *root, const char *name,
3016 int name_len, struct btrfs_inode *dir,
3017 struct btrfs_key *location, u8 type, u64 index);
3018 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3019 struct btrfs_root *root,
3020 struct btrfs_path *path, u64 dir,
3021 const char *name, int name_len,
3023 struct btrfs_dir_item *
3024 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3025 struct btrfs_root *root,
3026 struct btrfs_path *path, u64 dir,
3027 u64 objectid, const char *name, int name_len,
3029 struct btrfs_dir_item *
3030 btrfs_search_dir_index_item(struct btrfs_root *root,
3031 struct btrfs_path *path, u64 dirid,
3032 const char *name, int name_len);
3033 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3034 struct btrfs_root *root,
3035 struct btrfs_path *path,
3036 struct btrfs_dir_item *di);
3037 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3038 struct btrfs_root *root,
3039 struct btrfs_path *path, u64 objectid,
3040 const char *name, u16 name_len,
3041 const void *data, u16 data_len);
3042 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3043 struct btrfs_root *root,
3044 struct btrfs_path *path, u64 dir,
3045 const char *name, u16 name_len,
3047 int verify_dir_item(struct btrfs_fs_info *fs_info,
3048 struct extent_buffer *leaf, int slot,
3049 struct btrfs_dir_item *dir_item);
3050 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3051 struct btrfs_path *path,
3054 bool btrfs_is_name_len_valid(struct extent_buffer *leaf, int slot,
3055 unsigned long start, u16 name_len);
3058 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3059 struct btrfs_root *root, u64 offset);
3060 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3061 struct btrfs_root *root, u64 offset);
3062 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3065 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3066 struct btrfs_root *root,
3067 const char *name, int name_len,
3068 u64 inode_objectid, u64 ref_objectid, u64 index);
3069 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3070 struct btrfs_root *root,
3071 const char *name, int name_len,
3072 u64 inode_objectid, u64 ref_objectid, u64 *index);
3073 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3074 struct btrfs_root *root,
3075 struct btrfs_path *path, u64 objectid);
3076 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3077 *root, struct btrfs_path *path,
3078 struct btrfs_key *location, int mod);
3080 struct btrfs_inode_extref *
3081 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3082 struct btrfs_root *root,
3083 struct btrfs_path *path,
3084 const char *name, int name_len,
3085 u64 inode_objectid, u64 ref_objectid, int ins_len,
3088 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3089 u64 ref_objectid, const char *name,
3091 struct btrfs_inode_extref **extref_ret);
3094 struct btrfs_dio_private;
3095 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3096 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3097 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
3098 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3099 u64 logical_offset);
3100 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3101 struct btrfs_root *root,
3102 u64 objectid, u64 pos,
3103 u64 disk_offset, u64 disk_num_bytes,
3104 u64 num_bytes, u64 offset, u64 ram_bytes,
3105 u8 compression, u8 encryption, u16 other_encoding);
3106 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3107 struct btrfs_root *root,
3108 struct btrfs_path *path, u64 objectid,
3109 u64 bytenr, int mod);
3110 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3111 struct btrfs_root *root,
3112 struct btrfs_ordered_sum *sums);
3113 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3114 u64 file_start, int contig);
3115 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3116 struct list_head *list, int search_commit);
3117 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3118 const struct btrfs_path *path,
3119 struct btrfs_file_extent_item *fi,
3120 const bool new_inline,
3121 struct extent_map *em);
3124 struct btrfs_delalloc_work {
3125 struct inode *inode;
3127 struct completion completion;
3128 struct list_head list;
3129 struct btrfs_work work;
3132 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3134 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3136 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3137 struct page *page, size_t pg_offset, u64 start,
3138 u64 len, int create);
3139 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3140 u64 *orig_start, u64 *orig_block_len,
3143 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3144 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3145 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3146 struct btrfs_root *root,
3147 struct btrfs_inode *dir, struct btrfs_inode *inode,
3148 const char *name, int name_len);
3149 int btrfs_add_link(struct btrfs_trans_handle *trans,
3150 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3151 const char *name, int name_len, int add_backref, u64 index);
3152 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root,
3154 struct inode *dir, u64 objectid,
3155 const char *name, int name_len);
3156 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3158 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root,
3160 struct inode *inode, u64 new_size,
3163 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3164 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3166 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3167 struct extent_state **cached_state, int dedupe);
3168 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3169 struct btrfs_root *new_root,
3170 struct btrfs_root *parent_root,
3172 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3173 size_t size, struct bio *bio,
3174 unsigned long bio_flags);
3175 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end);
3176 int btrfs_page_mkwrite(struct vm_fault *vmf);
3177 int btrfs_readpage(struct file *file, struct page *page);
3178 void btrfs_evict_inode(struct inode *inode);
3179 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3180 struct inode *btrfs_alloc_inode(struct super_block *sb);
3181 void btrfs_destroy_inode(struct inode *inode);
3182 int btrfs_drop_inode(struct inode *inode);
3183 int btrfs_init_cachep(void);
3184 void btrfs_destroy_cachep(void);
3185 long btrfs_ioctl_trans_end(struct file *file);
3186 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3187 struct btrfs_root *root, int *was_new);
3188 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3189 struct page *page, size_t pg_offset,
3190 u64 start, u64 end, int create);
3191 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3192 struct btrfs_root *root,
3193 struct inode *inode);
3194 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3195 struct btrfs_root *root, struct inode *inode);
3196 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3197 struct btrfs_inode *inode);
3198 int btrfs_orphan_cleanup(struct btrfs_root *root);
3199 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3200 struct btrfs_root *root);
3201 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3202 void btrfs_invalidate_inodes(struct btrfs_root *root);
3203 void btrfs_add_delayed_iput(struct inode *inode);
3204 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3205 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3206 u64 start, u64 num_bytes, u64 min_size,
3207 loff_t actual_len, u64 *alloc_hint);
3208 int btrfs_prealloc_file_range_trans(struct inode *inode,
3209 struct btrfs_trans_handle *trans, int mode,
3210 u64 start, u64 num_bytes, u64 min_size,
3211 loff_t actual_len, u64 *alloc_hint);
3212 extern const struct dentry_operations btrfs_dentry_operations;
3213 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3214 void btrfs_test_inode_set_ops(struct inode *inode);
3218 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3219 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3220 int btrfs_ioctl_get_supported_features(void __user *arg);
3221 void btrfs_update_iflags(struct inode *inode);
3222 int btrfs_is_empty_uuid(u8 *uuid);
3223 int btrfs_defrag_file(struct inode *inode, struct file *file,
3224 struct btrfs_ioctl_defrag_range_args *range,
3225 u64 newer_than, unsigned long max_pages);
3226 void btrfs_get_block_group_info(struct list_head *groups_list,
3227 struct btrfs_ioctl_space_info *space);
3228 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3229 struct btrfs_ioctl_balance_args *bargs);
3230 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
3231 struct file *dst_file, u64 dst_loff);
3234 int btrfs_auto_defrag_init(void);
3235 void btrfs_auto_defrag_exit(void);
3236 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3237 struct btrfs_inode *inode);
3238 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3239 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3240 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3241 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3243 extern const struct file_operations btrfs_file_operations;
3244 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3245 struct btrfs_root *root, struct inode *inode,
3246 struct btrfs_path *path, u64 start, u64 end,
3247 u64 *drop_end, int drop_cache,
3249 u32 extent_item_size,
3251 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3252 struct btrfs_root *root, struct inode *inode, u64 start,
3253 u64 end, int drop_cache);
3254 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3255 struct btrfs_inode *inode, u64 start, u64 end);
3256 int btrfs_release_file(struct inode *inode, struct file *file);
3257 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3258 size_t num_pages, loff_t pos, size_t write_bytes,
3259 struct extent_state **cached);
3260 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3261 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3262 struct file *file_out, loff_t pos_out, u64 len);
3265 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3266 struct btrfs_root *root);
3269 int btrfs_init_sysfs(void);
3270 void btrfs_exit_sysfs(void);
3271 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3272 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3275 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3278 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3279 unsigned long new_flags);
3280 int btrfs_sync_fs(struct super_block *sb, int wait);
3282 static inline __printf(2, 3)
3283 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3287 #ifdef CONFIG_PRINTK
3289 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3291 #define btrfs_printk(fs_info, fmt, args...) \
3292 btrfs_no_printk(fs_info, fmt, ##args)
3295 #define btrfs_emerg(fs_info, fmt, args...) \
3296 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3297 #define btrfs_alert(fs_info, fmt, args...) \
3298 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3299 #define btrfs_crit(fs_info, fmt, args...) \
3300 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3301 #define btrfs_err(fs_info, fmt, args...) \
3302 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3303 #define btrfs_warn(fs_info, fmt, args...) \
3304 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3305 #define btrfs_notice(fs_info, fmt, args...) \
3306 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3307 #define btrfs_info(fs_info, fmt, args...) \
3308 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3311 * Wrappers that use printk_in_rcu
3313 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3314 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3315 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3316 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3317 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3318 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3319 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3320 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3321 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3322 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3323 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3324 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3325 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3326 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3329 * Wrappers that use a ratelimited printk_in_rcu
3331 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3332 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3333 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3334 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3335 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3336 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3337 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3338 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3339 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3340 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3341 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3342 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3343 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3344 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3347 * Wrappers that use a ratelimited printk
3349 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3350 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3351 #define btrfs_alert_rl(fs_info, fmt, args...) \
3352 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3353 #define btrfs_crit_rl(fs_info, fmt, args...) \
3354 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3355 #define btrfs_err_rl(fs_info, fmt, args...) \
3356 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3357 #define btrfs_warn_rl(fs_info, fmt, args...) \
3358 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3359 #define btrfs_notice_rl(fs_info, fmt, args...) \
3360 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3361 #define btrfs_info_rl(fs_info, fmt, args...) \
3362 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3364 #if defined(CONFIG_DYNAMIC_DEBUG)
3365 #define btrfs_debug(fs_info, fmt, args...) \
3367 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3368 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3369 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3371 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3373 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3374 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3375 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3377 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3379 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3380 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3381 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3384 #define btrfs_debug_rl(fs_info, fmt, args...) \
3386 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3387 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3388 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3391 #elif defined(DEBUG)
3392 #define btrfs_debug(fs_info, fmt, args...) \
3393 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3394 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3395 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3396 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3397 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3398 #define btrfs_debug_rl(fs_info, fmt, args...) \
3399 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3401 #define btrfs_debug(fs_info, fmt, args...) \
3402 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3403 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3404 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3405 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3406 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3407 #define btrfs_debug_rl(fs_info, fmt, args...) \
3408 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3411 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3414 btrfs_printk(fs_info, fmt, ##args); \
3415 rcu_read_unlock(); \
3418 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3420 static DEFINE_RATELIMIT_STATE(_rs, \
3421 DEFAULT_RATELIMIT_INTERVAL, \
3422 DEFAULT_RATELIMIT_BURST); \
3423 if (__ratelimit(&_rs)) \
3424 btrfs_printk(fs_info, fmt, ##args); \
3427 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3430 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3431 rcu_read_unlock(); \
3434 #ifdef CONFIG_BTRFS_ASSERT
3437 static inline void assfail(char *expr, char *file, int line)
3439 pr_err("assertion failed: %s, file: %s, line: %d\n",
3444 #define ASSERT(expr) \
3445 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3447 #define ASSERT(expr) ((void)0)
3452 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3453 unsigned int line, int errno, const char *fmt, ...);
3455 const char *btrfs_decode_error(int errno);
3458 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3459 const char *function,
3460 unsigned int line, int errno);
3463 * Call btrfs_abort_transaction as early as possible when an error condition is
3464 * detected, that way the exact line number is reported.
3466 #define btrfs_abort_transaction(trans, errno) \
3468 /* Report first abort since mount */ \
3469 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3470 &((trans)->fs_info->fs_state))) { \
3471 if ((errno) != -EIO) { \
3472 WARN(1, KERN_DEBUG \
3473 "BTRFS: Transaction aborted (error %d)\n", \
3476 btrfs_debug((trans)->fs_info, \
3477 "Transaction aborted (error %d)", \
3481 __btrfs_abort_transaction((trans), __func__, \
3482 __LINE__, (errno)); \
3485 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3487 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3488 (errno), fmt, ##args); \
3493 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3494 unsigned int line, int errno, const char *fmt, ...);
3496 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3497 * will panic(). Otherwise we BUG() here.
3499 #define btrfs_panic(fs_info, errno, fmt, args...) \
3501 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3506 /* compatibility and incompatibility defines */
3508 #define btrfs_set_fs_incompat(__fs_info, opt) \
3509 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3511 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3514 struct btrfs_super_block *disk_super;
3517 disk_super = fs_info->super_copy;
3518 features = btrfs_super_incompat_flags(disk_super);
3519 if (!(features & flag)) {
3520 spin_lock(&fs_info->super_lock);
3521 features = btrfs_super_incompat_flags(disk_super);
3522 if (!(features & flag)) {
3524 btrfs_set_super_incompat_flags(disk_super, features);
3525 btrfs_info(fs_info, "setting %llu feature flag",
3528 spin_unlock(&fs_info->super_lock);
3532 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3533 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3535 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3538 struct btrfs_super_block *disk_super;
3541 disk_super = fs_info->super_copy;
3542 features = btrfs_super_incompat_flags(disk_super);
3543 if (features & flag) {
3544 spin_lock(&fs_info->super_lock);
3545 features = btrfs_super_incompat_flags(disk_super);
3546 if (features & flag) {
3548 btrfs_set_super_incompat_flags(disk_super, features);
3549 btrfs_info(fs_info, "clearing %llu feature flag",
3552 spin_unlock(&fs_info->super_lock);
3556 #define btrfs_fs_incompat(fs_info, opt) \
3557 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3559 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3561 struct btrfs_super_block *disk_super;
3562 disk_super = fs_info->super_copy;
3563 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3566 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3567 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3569 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3572 struct btrfs_super_block *disk_super;
3575 disk_super = fs_info->super_copy;
3576 features = btrfs_super_compat_ro_flags(disk_super);
3577 if (!(features & flag)) {
3578 spin_lock(&fs_info->super_lock);
3579 features = btrfs_super_compat_ro_flags(disk_super);
3580 if (!(features & flag)) {
3582 btrfs_set_super_compat_ro_flags(disk_super, features);
3583 btrfs_info(fs_info, "setting %llu ro feature flag",
3586 spin_unlock(&fs_info->super_lock);
3590 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3591 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3593 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3596 struct btrfs_super_block *disk_super;
3599 disk_super = fs_info->super_copy;
3600 features = btrfs_super_compat_ro_flags(disk_super);
3601 if (features & flag) {
3602 spin_lock(&fs_info->super_lock);
3603 features = btrfs_super_compat_ro_flags(disk_super);
3604 if (features & flag) {
3606 btrfs_set_super_compat_ro_flags(disk_super, features);
3607 btrfs_info(fs_info, "clearing %llu ro feature flag",
3610 spin_unlock(&fs_info->super_lock);
3614 #define btrfs_fs_compat_ro(fs_info, opt) \
3615 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3617 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3619 struct btrfs_super_block *disk_super;
3620 disk_super = fs_info->super_copy;
3621 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3625 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3626 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3627 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3628 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3629 struct inode *inode, struct inode *dir);
3631 #define btrfs_get_acl NULL
3632 #define btrfs_set_acl NULL
3633 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3634 struct inode *inode, struct inode *dir)
3641 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3642 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3643 struct btrfs_root *root);
3644 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3645 struct btrfs_root *root);
3646 int btrfs_recover_relocation(struct btrfs_root *root);
3647 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3648 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3649 struct btrfs_root *root, struct extent_buffer *buf,
3650 struct extent_buffer *cow);
3651 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3652 u64 *bytes_to_reserve);
3653 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3654 struct btrfs_pending_snapshot *pending);
3657 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3658 u64 end, struct btrfs_scrub_progress *progress,
3659 int readonly, int is_dev_replace);
3660 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3661 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3662 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3663 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3664 struct btrfs_device *dev);
3665 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3666 struct btrfs_scrub_progress *progress);
3667 static inline void btrfs_init_full_stripe_locks_tree(
3668 struct btrfs_full_stripe_locks_tree *locks_root)
3670 locks_root->root = RB_ROOT;
3671 mutex_init(&locks_root->lock);
3675 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3676 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3677 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3679 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3681 btrfs_bio_counter_sub(fs_info, 1);
3685 struct reada_control {
3686 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3687 struct btrfs_key key_start;
3688 struct btrfs_key key_end; /* exclusive */
3691 wait_queue_head_t wait;
3693 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3694 struct btrfs_key *start, struct btrfs_key *end);
3695 int btrfs_reada_wait(void *handle);
3696 void btrfs_reada_detach(void *handle);
3697 int btree_readahead_hook(struct extent_buffer *eb, int err);
3699 static inline int is_fstree(u64 rootid)
3701 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3702 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3703 !btrfs_qgroup_level(rootid)))
3708 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3710 return signal_pending(current);
3713 /* Sanity test specific functions */
3714 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3715 void btrfs_test_destroy_inode(struct inode *inode);
3718 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3720 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3721 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3722 &fs_info->fs_state)))