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/highmem.h>
25 #include <linux/rwsem.h>
26 #include <linux/semaphore.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <linux/wait.h>
30 #include <linux/slab.h>
31 #include <linux/kobject.h>
32 #include <trace/events/btrfs.h>
33 #include <asm/kmap_types.h>
34 #include <linux/pagemap.h>
35 #include <linux/btrfs.h>
36 #include <linux/btrfs_tree.h>
37 #include <linux/workqueue.h>
38 #include <linux/security.h>
39 #include <linux/sizes.h>
40 #include <linux/dynamic_debug.h>
41 #include "extent_io.h"
42 #include "extent_map.h"
43 #include "async-thread.h"
45 struct btrfs_trans_handle;
46 struct btrfs_transaction;
47 struct btrfs_pending_snapshot;
48 extern struct kmem_cache *btrfs_trans_handle_cachep;
49 extern struct kmem_cache *btrfs_transaction_cachep;
50 extern struct kmem_cache *btrfs_bit_radix_cachep;
51 extern struct kmem_cache *btrfs_path_cachep;
52 extern struct kmem_cache *btrfs_free_space_cachep;
53 struct btrfs_ordered_sum;
55 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
56 #define STATIC noinline
58 #define STATIC static noinline
61 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
63 #define BTRFS_MAX_MIRRORS 3
65 #define BTRFS_MAX_LEVEL 8
67 #define BTRFS_COMPAT_EXTENT_TREE_V0
70 * the max metadata block size. This limit is somewhat artificial,
71 * but the memmove costs go through the roof for larger blocks.
73 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
76 * we can actually store much bigger names, but lets not confuse the rest
79 #define BTRFS_NAME_LEN 255
82 * Theoretical limit is larger, but we keep this down to a sane
83 * value. That should limit greatly the possibility of collisions on
86 #define BTRFS_LINK_MAX 65535U
88 static const int btrfs_csum_sizes[] = { 4 };
90 /* four bytes for CRC32 */
91 #define BTRFS_EMPTY_DIR_SIZE 0
93 /* specific to btrfs_map_block(), therefore not in include/linux/blk_types.h */
94 #define REQ_GET_READ_MIRRORS (1 << 30)
96 /* ioprio of readahead is set to idle */
97 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
99 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
101 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
103 struct btrfs_mapping_tree {
104 struct extent_map_tree map_tree;
107 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
109 BUG_ON(num_stripes == 0);
110 return sizeof(struct btrfs_chunk) +
111 sizeof(struct btrfs_stripe) * (num_stripes - 1);
117 #define BTRFS_FS_STATE_ERROR 0
118 #define BTRFS_FS_STATE_REMOUNTING 1
119 #define BTRFS_FS_STATE_TRANS_ABORTED 2
120 #define BTRFS_FS_STATE_DEV_REPLACING 3
121 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4
123 #define BTRFS_BACKREF_REV_MAX 256
124 #define BTRFS_BACKREF_REV_SHIFT 56
125 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
126 BTRFS_BACKREF_REV_SHIFT)
128 #define BTRFS_OLD_BACKREF_REV 0
129 #define BTRFS_MIXED_BACKREF_REV 1
132 * every tree block (leaf or node) starts with this header.
134 struct btrfs_header {
135 /* these first four must match the super block */
136 u8 csum[BTRFS_CSUM_SIZE];
137 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
138 __le64 bytenr; /* which block this node is supposed to live in */
141 /* allowed to be different from the super from here on down */
142 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
147 } __attribute__ ((__packed__));
150 * this is a very generous portion of the super block, giving us
151 * room to translate 14 chunks with 3 stripes each.
153 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
156 * just in case we somehow lose the roots and are not able to mount,
157 * we store an array of the roots from previous transactions
160 #define BTRFS_NUM_BACKUP_ROOTS 4
161 struct btrfs_root_backup {
163 __le64 tree_root_gen;
166 __le64 chunk_root_gen;
169 __le64 extent_root_gen;
178 __le64 csum_root_gen;
188 u8 extent_root_level;
192 /* future and to align */
194 } __attribute__ ((__packed__));
197 * the super block basically lists the main trees of the FS
198 * it currently lacks any block count etc etc
200 struct btrfs_super_block {
201 u8 csum[BTRFS_CSUM_SIZE];
202 /* the first 4 fields must match struct btrfs_header */
203 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
204 __le64 bytenr; /* this block number */
207 /* allowed to be different from the btrfs_header from here own down */
214 /* this will help find the new super based on the log root */
215 __le64 log_root_transid;
218 __le64 root_dir_objectid;
222 __le32 __unused_leafsize;
224 __le32 sys_chunk_array_size;
225 __le64 chunk_root_generation;
227 __le64 compat_ro_flags;
228 __le64 incompat_flags;
233 struct btrfs_dev_item dev_item;
235 char label[BTRFS_LABEL_SIZE];
237 __le64 cache_generation;
238 __le64 uuid_tree_generation;
240 /* future expansion */
242 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
243 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
244 } __attribute__ ((__packed__));
247 * Compat flags that we support. If any incompat flags are set other than the
248 * ones specified below then we will fail to mount
250 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
251 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
252 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
254 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
255 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
257 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
258 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
260 #define BTRFS_FEATURE_INCOMPAT_SUPP \
261 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
262 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
263 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
264 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
265 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
266 BTRFS_FEATURE_INCOMPAT_RAID56 | \
267 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
268 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
269 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
271 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
272 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
273 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
276 * A leaf is full of items. offset and size tell us where to find
277 * the item in the leaf (relative to the start of the data area)
280 struct btrfs_disk_key key;
283 } __attribute__ ((__packed__));
286 * leaves have an item area and a data area:
287 * [item0, item1....itemN] [free space] [dataN...data1, data0]
289 * The data is separate from the items to get the keys closer together
293 struct btrfs_header header;
294 struct btrfs_item items[];
295 } __attribute__ ((__packed__));
298 * all non-leaf blocks are nodes, they hold only keys and pointers to
301 struct btrfs_key_ptr {
302 struct btrfs_disk_key key;
305 } __attribute__ ((__packed__));
308 struct btrfs_header header;
309 struct btrfs_key_ptr ptrs[];
310 } __attribute__ ((__packed__));
313 * btrfs_paths remember the path taken from the root down to the leaf.
314 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
315 * to any other levels that are present.
317 * The slots array records the index of the item or block pointer
318 * used while walking the tree.
320 enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
322 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
323 int slots[BTRFS_MAX_LEVEL];
324 /* if there is real range locking, this locks field will change */
325 u8 locks[BTRFS_MAX_LEVEL];
327 /* keep some upper locks as we walk down */
331 * set by btrfs_split_item, tells search_slot to keep all locks
332 * and to force calls to keep space in the nodes
334 unsigned int search_for_split:1;
335 unsigned int keep_locks:1;
336 unsigned int skip_locking:1;
337 unsigned int leave_spinning:1;
338 unsigned int search_commit_root:1;
339 unsigned int need_commit_sem:1;
340 unsigned int skip_release_on_error:1;
342 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
343 sizeof(struct btrfs_item))
344 struct btrfs_dev_replace {
345 u64 replace_state; /* see #define above */
346 u64 time_started; /* seconds since 1-Jan-1970 */
347 u64 time_stopped; /* seconds since 1-Jan-1970 */
348 atomic64_t num_write_errors;
349 atomic64_t num_uncorrectable_read_errors;
352 u64 committed_cursor_left;
353 u64 cursor_left_last_write_of_item;
356 u64 cont_reading_from_srcdev_mode; /* see #define above */
359 int item_needs_writeback;
360 struct btrfs_device *srcdev;
361 struct btrfs_device *tgtdev;
364 atomic_t nesting_level;
365 struct mutex lock_finishing_cancel_unmount;
368 atomic_t blocking_readers;
369 wait_queue_head_t read_lock_wq;
371 struct btrfs_scrub_progress scrub_progress;
374 /* For raid type sysfs entries */
375 struct raid_kobject {
380 struct btrfs_space_info {
383 u64 total_bytes; /* total bytes in the space,
384 this doesn't take mirrors into account */
385 u64 bytes_used; /* total bytes used,
386 this doesn't take mirrors into account */
387 u64 bytes_pinned; /* total bytes pinned, will be freed when the
388 transaction finishes */
389 u64 bytes_reserved; /* total bytes the allocator has reserved for
390 current allocations */
391 u64 bytes_may_use; /* number of bytes that may be used for
392 delalloc/allocations */
393 u64 bytes_readonly; /* total bytes that are read only */
395 u64 max_extent_size; /* This will hold the maximum extent size of
396 the space info if we had an ENOSPC in the
399 unsigned int full:1; /* indicates that we cannot allocate any more
400 chunks for this space */
401 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
403 unsigned int flush:1; /* set if we are trying to make space */
405 unsigned int force_alloc; /* set if we need to force a chunk
406 alloc for this space */
408 u64 disk_used; /* total bytes used on disk */
409 u64 disk_total; /* total bytes on disk, takes mirrors into
415 * bytes_pinned is kept in line with what is actually pinned, as in
416 * we've called update_block_group and dropped the bytes_used counter
417 * and increased the bytes_pinned counter. However this means that
418 * bytes_pinned does not reflect the bytes that will be pinned once the
419 * delayed refs are flushed, so this counter is inc'ed every time we
420 * call btrfs_free_extent so it is a realtime count of what will be
421 * freed once the transaction is committed. It will be zeroed every
422 * time the transaction commits.
424 struct percpu_counter total_bytes_pinned;
426 struct list_head list;
427 /* Protected by the spinlock 'lock'. */
428 struct list_head ro_bgs;
429 struct list_head priority_tickets;
430 struct list_head tickets;
433 struct rw_semaphore groups_sem;
434 /* for block groups in our same type */
435 struct list_head block_groups[BTRFS_NR_RAID_TYPES];
436 wait_queue_head_t wait;
439 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
442 #define BTRFS_BLOCK_RSV_GLOBAL 1
443 #define BTRFS_BLOCK_RSV_DELALLOC 2
444 #define BTRFS_BLOCK_RSV_TRANS 3
445 #define BTRFS_BLOCK_RSV_CHUNK 4
446 #define BTRFS_BLOCK_RSV_DELOPS 5
447 #define BTRFS_BLOCK_RSV_EMPTY 6
448 #define BTRFS_BLOCK_RSV_TEMP 7
450 struct btrfs_block_rsv {
453 struct btrfs_space_info *space_info;
457 unsigned short failfast;
461 * free clusters are used to claim free space in relatively large chunks,
462 * allowing us to do less seeky writes. They are used for all metadata
463 * allocations and data allocations in ssd mode.
465 struct btrfs_free_cluster {
467 spinlock_t refill_lock;
470 /* largest extent in this cluster */
473 /* first extent starting offset */
476 /* We did a full search and couldn't create a cluster */
479 struct btrfs_block_group_cache *block_group;
481 * when a cluster is allocated from a block group, we put the
482 * cluster onto a list in the block group so that it can
483 * be freed before the block group is freed.
485 struct list_head block_group_list;
488 enum btrfs_caching_type {
490 BTRFS_CACHE_STARTED = 1,
491 BTRFS_CACHE_FAST = 2,
492 BTRFS_CACHE_FINISHED = 3,
493 BTRFS_CACHE_ERROR = 4,
496 enum btrfs_disk_cache_state {
497 BTRFS_DC_WRITTEN = 0,
503 struct btrfs_caching_control {
504 struct list_head list;
506 wait_queue_head_t wait;
507 struct btrfs_work work;
508 struct btrfs_block_group_cache *block_group;
513 /* Once caching_thread() finds this much free space, it will wake up waiters. */
514 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)
516 struct btrfs_io_ctl {
520 struct btrfs_root *root;
527 unsigned check_crcs:1;
530 struct btrfs_block_group_cache {
531 struct btrfs_key key;
532 struct btrfs_block_group_item item;
533 struct btrfs_fs_info *fs_info;
541 u64 cache_generation;
545 * If the free space extent count exceeds this number, convert the block
548 u32 bitmap_high_thresh;
551 * If the free space extent count drops below this number, convert the
552 * block group back to extents.
554 u32 bitmap_low_thresh;
557 * It is just used for the delayed data space allocation because
558 * only the data space allocation and the relative metadata update
559 * can be done cross the transaction.
561 struct rw_semaphore data_rwsem;
563 /* for raid56, this is a full stripe, without parity */
564 unsigned long full_stripe_len;
568 unsigned int has_caching_ctl:1;
569 unsigned int removed:1;
571 int disk_cache_state;
573 /* cache tracking stuff */
575 struct btrfs_caching_control *caching_ctl;
576 u64 last_byte_to_unpin;
578 struct btrfs_space_info *space_info;
580 /* free space cache stuff */
581 struct btrfs_free_space_ctl *free_space_ctl;
583 /* block group cache stuff */
584 struct rb_node cache_node;
586 /* for block groups in the same raid type */
587 struct list_head list;
592 /* List of struct btrfs_free_clusters for this block group.
593 * Today it will only have one thing on it, but that may change
595 struct list_head cluster_list;
597 /* For delayed block group creation or deletion of empty block groups */
598 struct list_head bg_list;
600 /* For read-only block groups */
601 struct list_head ro_list;
605 /* For dirty block groups */
606 struct list_head dirty_list;
607 struct list_head io_list;
609 struct btrfs_io_ctl io_ctl;
612 * Incremented when doing extent allocations and holding a read lock
613 * on the space_info's groups_sem semaphore.
614 * Decremented when an ordered extent that represents an IO against this
615 * block group's range is created (after it's added to its inode's
616 * root's list of ordered extents) or immediately after the allocation
617 * if it's a metadata extent or fallocate extent (for these cases we
618 * don't create ordered extents).
620 atomic_t reservations;
623 * Incremented while holding the spinlock *lock* by a task checking if
624 * it can perform a nocow write (incremented if the value for the *ro*
625 * field is 0). Decremented by such tasks once they create an ordered
626 * extent or before that if some error happens before reaching that step.
627 * This is to prevent races between block group relocation and nocow
628 * writes through direct IO.
630 atomic_t nocow_writers;
632 /* Lock for free space tree operations. */
633 struct mutex free_space_lock;
636 * Does the block group need to be added to the free space tree?
637 * Protected by free_space_lock.
639 int needs_free_space;
642 /* delayed seq elem */
644 struct list_head list;
648 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
650 enum btrfs_orphan_cleanup_state {
651 ORPHAN_CLEANUP_STARTED = 1,
652 ORPHAN_CLEANUP_DONE = 2,
655 /* used by the raid56 code to lock stripes for read/modify/write */
656 struct btrfs_stripe_hash {
657 struct list_head hash_list;
658 wait_queue_head_t wait;
662 /* used by the raid56 code to lock stripes for read/modify/write */
663 struct btrfs_stripe_hash_table {
664 struct list_head stripe_cache;
665 spinlock_t cache_lock;
667 struct btrfs_stripe_hash table[];
670 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
672 void btrfs_init_async_reclaim_work(struct work_struct *work);
675 struct reloc_control;
677 struct btrfs_fs_devices;
678 struct btrfs_balance_control;
679 struct btrfs_delayed_root;
680 struct btrfs_fs_info {
681 u8 fsid[BTRFS_FSID_SIZE];
682 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
683 struct btrfs_root *extent_root;
684 struct btrfs_root *tree_root;
685 struct btrfs_root *chunk_root;
686 struct btrfs_root *dev_root;
687 struct btrfs_root *fs_root;
688 struct btrfs_root *csum_root;
689 struct btrfs_root *quota_root;
690 struct btrfs_root *uuid_root;
691 struct btrfs_root *free_space_root;
693 /* the log root tree is a directory of all the other log roots */
694 struct btrfs_root *log_root_tree;
696 spinlock_t fs_roots_radix_lock;
697 struct radix_tree_root fs_roots_radix;
699 /* block group cache stuff */
700 spinlock_t block_group_cache_lock;
701 u64 first_logical_byte;
702 struct rb_root block_group_cache_tree;
704 /* keep track of unallocated space */
705 spinlock_t free_chunk_lock;
706 u64 free_chunk_space;
708 struct extent_io_tree freed_extents[2];
709 struct extent_io_tree *pinned_extents;
711 /* logical->physical extent mapping */
712 struct btrfs_mapping_tree mapping_tree;
715 * block reservation for extent, checksum, root tree and
716 * delayed dir index item
718 struct btrfs_block_rsv global_block_rsv;
719 /* block reservation for delay allocation */
720 struct btrfs_block_rsv delalloc_block_rsv;
721 /* block reservation for metadata operations */
722 struct btrfs_block_rsv trans_block_rsv;
723 /* block reservation for chunk tree */
724 struct btrfs_block_rsv chunk_block_rsv;
725 /* block reservation for delayed operations */
726 struct btrfs_block_rsv delayed_block_rsv;
728 struct btrfs_block_rsv empty_block_rsv;
731 u64 last_trans_committed;
732 u64 avg_delayed_ref_runtime;
735 * this is updated to the current trans every time a full commit
736 * is required instead of the faster short fsync log commits
738 u64 last_trans_log_full_commit;
739 unsigned long mount_opt;
741 * Track requests for actions that need to be done during transaction
742 * commit (like for some mount options).
744 unsigned long pending_changes;
745 unsigned long compress_type:4;
748 * It is a suggestive number, the read side is safe even it gets a
749 * wrong number because we will write out the data into a regular
750 * extent. The write side(mount/remount) is under ->s_umount lock,
751 * so it is also safe.
755 * Protected by ->chunk_mutex and sb->s_umount.
757 * The reason that we use two lock to protect it is because only
758 * remount and mount operations can change it and these two operations
759 * are under sb->s_umount, but the read side (chunk allocation) can not
760 * acquire sb->s_umount or the deadlock would happen. So we use two
761 * locks to protect it. On the write side, we must acquire two locks,
762 * and on the read side, we just need acquire one of them.
765 struct btrfs_transaction *running_transaction;
766 wait_queue_head_t transaction_throttle;
767 wait_queue_head_t transaction_wait;
768 wait_queue_head_t transaction_blocked_wait;
769 wait_queue_head_t async_submit_wait;
772 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
773 * when they are updated.
775 * Because we do not clear the flags for ever, so we needn't use
776 * the lock on the read side.
778 * We also needn't use the lock when we mount the fs, because
779 * there is no other task which will update the flag.
781 spinlock_t super_lock;
782 struct btrfs_super_block *super_copy;
783 struct btrfs_super_block *super_for_commit;
784 struct block_device *__bdev;
785 struct super_block *sb;
786 struct inode *btree_inode;
787 struct backing_dev_info bdi;
788 struct mutex tree_log_mutex;
789 struct mutex transaction_kthread_mutex;
790 struct mutex cleaner_mutex;
791 struct mutex chunk_mutex;
792 struct mutex volume_mutex;
795 * this is taken to make sure we don't set block groups ro after
796 * the free space cache has been allocated on them
798 struct mutex ro_block_group_mutex;
800 /* this is used during read/modify/write to make sure
801 * no two ios are trying to mod the same stripe at the same
804 struct btrfs_stripe_hash_table *stripe_hash_table;
807 * this protects the ordered operations list only while we are
808 * processing all of the entries on it. This way we make
809 * sure the commit code doesn't find the list temporarily empty
810 * because another function happens to be doing non-waiting preflush
811 * before jumping into the main commit.
813 struct mutex ordered_operations_mutex;
815 struct rw_semaphore commit_root_sem;
817 struct rw_semaphore cleanup_work_sem;
819 struct rw_semaphore subvol_sem;
820 struct srcu_struct subvol_srcu;
822 spinlock_t trans_lock;
824 * the reloc mutex goes with the trans lock, it is taken
825 * during commit to protect us from the relocation code
827 struct mutex reloc_mutex;
829 struct list_head trans_list;
830 struct list_head dead_roots;
831 struct list_head caching_block_groups;
833 spinlock_t delayed_iput_lock;
834 struct list_head delayed_iputs;
835 struct mutex cleaner_delayed_iput_mutex;
837 /* this protects tree_mod_seq_list */
838 spinlock_t tree_mod_seq_lock;
839 atomic64_t tree_mod_seq;
840 struct list_head tree_mod_seq_list;
842 /* this protects tree_mod_log */
843 rwlock_t tree_mod_log_lock;
844 struct rb_root tree_mod_log;
846 atomic_t nr_async_submits;
847 atomic_t async_submit_draining;
848 atomic_t nr_async_bios;
849 atomic_t async_delalloc_pages;
850 atomic_t open_ioctl_trans;
853 * this is used to protect the following list -- ordered_roots.
855 spinlock_t ordered_root_lock;
858 * all fs/file tree roots in which there are data=ordered extents
859 * pending writeback are added into this list.
861 * these can span multiple transactions and basically include
862 * every dirty data page that isn't from nodatacow
864 struct list_head ordered_roots;
866 struct mutex delalloc_root_mutex;
867 spinlock_t delalloc_root_lock;
868 /* all fs/file tree roots that have delalloc inodes. */
869 struct list_head delalloc_roots;
872 * there is a pool of worker threads for checksumming during writes
873 * and a pool for checksumming after reads. This is because readers
874 * can run with FS locks held, and the writers may be waiting for
875 * those locks. We don't want ordering in the pending list to cause
876 * deadlocks, and so the two are serviced separately.
878 * A third pool does submit_bio to avoid deadlocking with the other
881 struct btrfs_workqueue *workers;
882 struct btrfs_workqueue *delalloc_workers;
883 struct btrfs_workqueue *flush_workers;
884 struct btrfs_workqueue *endio_workers;
885 struct btrfs_workqueue *endio_meta_workers;
886 struct btrfs_workqueue *endio_raid56_workers;
887 struct btrfs_workqueue *endio_repair_workers;
888 struct btrfs_workqueue *rmw_workers;
889 struct btrfs_workqueue *endio_meta_write_workers;
890 struct btrfs_workqueue *endio_write_workers;
891 struct btrfs_workqueue *endio_freespace_worker;
892 struct btrfs_workqueue *submit_workers;
893 struct btrfs_workqueue *caching_workers;
894 struct btrfs_workqueue *readahead_workers;
897 * fixup workers take dirty pages that didn't properly go through
898 * the cow mechanism and make them safe to write. It happens
899 * for the sys_munmap function call path
901 struct btrfs_workqueue *fixup_workers;
902 struct btrfs_workqueue *delayed_workers;
904 /* the extent workers do delayed refs on the extent allocation tree */
905 struct btrfs_workqueue *extent_workers;
906 struct task_struct *transaction_kthread;
907 struct task_struct *cleaner_kthread;
908 int thread_pool_size;
910 struct kobject *space_info_kobj;
913 int log_root_recovering;
918 /* used to keep from writing metadata until there is a nice batch */
919 struct percpu_counter dirty_metadata_bytes;
920 struct percpu_counter delalloc_bytes;
921 s32 dirty_metadata_batch;
924 struct list_head dirty_cowonly_roots;
926 struct btrfs_fs_devices *fs_devices;
929 * the space_info list is almost entirely read only. It only changes
930 * when we add a new raid type to the FS, and that happens
931 * very rarely. RCU is used to protect it.
933 struct list_head space_info;
935 struct btrfs_space_info *data_sinfo;
937 struct reloc_control *reloc_ctl;
939 /* data_alloc_cluster is only used in ssd mode */
940 struct btrfs_free_cluster data_alloc_cluster;
942 /* all metadata allocations go through this cluster */
943 struct btrfs_free_cluster meta_alloc_cluster;
945 /* auto defrag inodes go here */
946 spinlock_t defrag_inodes_lock;
947 struct rb_root defrag_inodes;
948 atomic_t defrag_running;
950 /* Used to protect avail_{data, metadata, system}_alloc_bits */
951 seqlock_t profiles_lock;
953 * these three are in extended format (availability of single
954 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
955 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
957 u64 avail_data_alloc_bits;
958 u64 avail_metadata_alloc_bits;
959 u64 avail_system_alloc_bits;
961 /* restriper state */
962 spinlock_t balance_lock;
963 struct mutex balance_mutex;
964 atomic_t balance_running;
965 atomic_t balance_pause_req;
966 atomic_t balance_cancel_req;
967 struct btrfs_balance_control *balance_ctl;
968 wait_queue_head_t balance_wait_q;
970 unsigned data_chunk_allocations;
971 unsigned metadata_ratio;
975 /* private scrub information */
976 struct mutex scrub_lock;
977 atomic_t scrubs_running;
978 atomic_t scrub_pause_req;
979 atomic_t scrubs_paused;
980 atomic_t scrub_cancel_req;
981 wait_queue_head_t scrub_pause_wait;
982 int scrub_workers_refcnt;
983 struct btrfs_workqueue *scrub_workers;
984 struct btrfs_workqueue *scrub_wr_completion_workers;
985 struct btrfs_workqueue *scrub_nocow_workers;
986 struct btrfs_workqueue *scrub_parity_workers;
988 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
989 u32 check_integrity_print_mask;
994 unsigned int quota_enabled:1;
997 * quota_enabled only changes state after a commit. This holds the
1000 unsigned int pending_quota_state:1;
1002 /* is qgroup tracking in a consistent state? */
1005 /* holds configuration and tracking. Protected by qgroup_lock */
1006 struct rb_root qgroup_tree;
1007 struct rb_root qgroup_op_tree;
1008 spinlock_t qgroup_lock;
1009 spinlock_t qgroup_op_lock;
1010 atomic_t qgroup_op_seq;
1013 * used to avoid frequently calling ulist_alloc()/ulist_free()
1014 * when doing qgroup accounting, it must be protected by qgroup_lock.
1016 struct ulist *qgroup_ulist;
1018 /* protect user change for quota operations */
1019 struct mutex qgroup_ioctl_lock;
1021 /* list of dirty qgroups to be written at next commit */
1022 struct list_head dirty_qgroups;
1024 /* used by qgroup for an efficient tree traversal */
1027 /* qgroup rescan items */
1028 struct mutex qgroup_rescan_lock; /* protects the progress item */
1029 struct btrfs_key qgroup_rescan_progress;
1030 struct btrfs_workqueue *qgroup_rescan_workers;
1031 struct completion qgroup_rescan_completion;
1032 struct btrfs_work qgroup_rescan_work;
1033 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1035 /* filesystem state */
1036 unsigned long fs_state;
1038 struct btrfs_delayed_root *delayed_root;
1040 /* readahead tree */
1041 spinlock_t reada_lock;
1042 struct radix_tree_root reada_tree;
1044 /* readahead works cnt */
1045 atomic_t reada_works_cnt;
1047 /* Extent buffer radix tree */
1048 spinlock_t buffer_lock;
1049 struct radix_tree_root buffer_radix;
1051 /* next backup root to be overwritten */
1052 int backup_root_index;
1054 int num_tolerated_disk_barrier_failures;
1056 /* device replace state */
1057 struct btrfs_dev_replace dev_replace;
1059 atomic_t mutually_exclusive_operation_running;
1061 struct percpu_counter bio_counter;
1062 wait_queue_head_t replace_wait;
1064 struct semaphore uuid_tree_rescan_sem;
1065 unsigned int update_uuid_tree_gen:1;
1067 /* Used to reclaim the metadata space in the background. */
1068 struct work_struct async_reclaim_work;
1070 spinlock_t unused_bgs_lock;
1071 struct list_head unused_bgs;
1072 struct mutex unused_bg_unpin_mutex;
1073 struct mutex delete_unused_bgs_mutex;
1075 /* For btrfs to record security options */
1076 struct security_mnt_opts security_opts;
1079 * Chunks that can't be freed yet (under a trim/discard operation)
1080 * and will be latter freed. Protected by fs_info->chunk_mutex.
1082 struct list_head pinned_chunks;
1084 int creating_free_space_tree;
1085 /* Used to record internally whether fs has been frozen */
1089 struct btrfs_subvolume_writers {
1090 struct percpu_counter counter;
1091 wait_queue_head_t wait;
1095 * The state of btrfs root
1098 * btrfs_record_root_in_trans is a multi-step process,
1099 * and it can race with the balancing code. But the
1100 * race is very small, and only the first time the root
1101 * is added to each transaction. So IN_TRANS_SETUP
1102 * is used to tell us when more checks are required
1104 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1105 #define BTRFS_ROOT_REF_COWS 1
1106 #define BTRFS_ROOT_TRACK_DIRTY 2
1107 #define BTRFS_ROOT_IN_RADIX 3
1108 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1109 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1110 #define BTRFS_ROOT_FORCE_COW 6
1111 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1112 #define BTRFS_ROOT_DIRTY 8
1115 * in ram representation of the tree. extent_root is used for all allocations
1116 * and for the extent tree extent_root root.
1119 struct extent_buffer *node;
1121 struct extent_buffer *commit_root;
1122 struct btrfs_root *log_root;
1123 struct btrfs_root *reloc_root;
1125 unsigned long state;
1126 struct btrfs_root_item root_item;
1127 struct btrfs_key root_key;
1128 struct btrfs_fs_info *fs_info;
1129 struct extent_io_tree dirty_log_pages;
1131 struct mutex objectid_mutex;
1133 spinlock_t accounting_lock;
1134 struct btrfs_block_rsv *block_rsv;
1136 /* free ino cache stuff */
1137 struct btrfs_free_space_ctl *free_ino_ctl;
1138 enum btrfs_caching_type ino_cache_state;
1139 spinlock_t ino_cache_lock;
1140 wait_queue_head_t ino_cache_wait;
1141 struct btrfs_free_space_ctl *free_ino_pinned;
1142 u64 ino_cache_progress;
1143 struct inode *ino_cache_inode;
1145 struct mutex log_mutex;
1146 wait_queue_head_t log_writer_wait;
1147 wait_queue_head_t log_commit_wait[2];
1148 struct list_head log_ctxs[2];
1149 atomic_t log_writers;
1150 atomic_t log_commit[2];
1153 /* No matter the commit succeeds or not*/
1154 int log_transid_committed;
1155 /* Just be updated when the commit succeeds. */
1156 int last_log_commit;
1157 pid_t log_start_pid;
1162 /* data allocations are done in sectorsize units */
1165 /* node allocations are done in nodesize units */
1172 u64 highest_objectid;
1174 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1175 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1179 u64 defrag_trans_start;
1180 struct btrfs_key defrag_progress;
1181 struct btrfs_key defrag_max;
1184 /* the dirty list is only used by non-reference counted roots */
1185 struct list_head dirty_list;
1187 struct list_head root_list;
1189 spinlock_t log_extents_lock[2];
1190 struct list_head logged_list[2];
1192 spinlock_t orphan_lock;
1193 atomic_t orphan_inodes;
1194 struct btrfs_block_rsv *orphan_block_rsv;
1195 int orphan_cleanup_state;
1197 spinlock_t inode_lock;
1198 /* red-black tree that keeps track of in-memory inodes */
1199 struct rb_root inode_tree;
1202 * radix tree that keeps track of delayed nodes of every inode,
1203 * protected by inode_lock
1205 struct radix_tree_root delayed_nodes_tree;
1207 * right now this just gets used so that a root has its own devid
1208 * for stat. It may be used for more later
1212 spinlock_t root_item_lock;
1215 struct mutex delalloc_mutex;
1216 spinlock_t delalloc_lock;
1218 * all of the inodes that have delalloc bytes. It is possible for
1219 * this list to be empty even when there is still dirty data=ordered
1220 * extents waiting to finish IO.
1222 struct list_head delalloc_inodes;
1223 struct list_head delalloc_root;
1224 u64 nr_delalloc_inodes;
1226 struct mutex ordered_extent_mutex;
1228 * this is used by the balancing code to wait for all the pending
1231 spinlock_t ordered_extent_lock;
1234 * all of the data=ordered extents pending writeback
1235 * these can span multiple transactions and basically include
1236 * every dirty data page that isn't from nodatacow
1238 struct list_head ordered_extents;
1239 struct list_head ordered_root;
1240 u64 nr_ordered_extents;
1243 * Number of currently running SEND ioctls to prevent
1244 * manipulation with the read-only status via SUBVOL_SETFLAGS
1246 int send_in_progress;
1247 struct btrfs_subvolume_writers *subv_writers;
1248 atomic_t will_be_snapshoted;
1250 /* For qgroup metadata space reserve */
1251 atomic_t qgroup_meta_rsv;
1254 static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize)
1256 return blocksize - sizeof(struct btrfs_header);
1259 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_root *root)
1261 return __BTRFS_LEAF_DATA_SIZE(root->nodesize);
1264 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_root *root)
1266 return BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item);
1269 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_root *root)
1271 return BTRFS_LEAF_DATA_SIZE(root) / sizeof(struct btrfs_key_ptr);
1274 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1275 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1276 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_root *root)
1278 return BTRFS_MAX_ITEM_SIZE(root) -
1279 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1282 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_root *root)
1284 return BTRFS_MAX_ITEM_SIZE(root) - sizeof(struct btrfs_dir_item);
1288 * Flags for mount options.
1290 * Note: don't forget to add new options to btrfs_show_options()
1292 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1293 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1294 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1295 #define BTRFS_MOUNT_SSD (1 << 3)
1296 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1297 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1298 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1299 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1300 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1301 #define BTRFS_MOUNT_NOSSD (1 << 9)
1302 #define BTRFS_MOUNT_DISCARD (1 << 10)
1303 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1304 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1305 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1306 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1307 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1308 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1309 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1310 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1311 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1312 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1313 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1314 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1315 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1316 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1317 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1318 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1319 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1321 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1322 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1324 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1325 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1326 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1327 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1330 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1332 if (!btrfs_test_opt(fs_info, opt)) \
1333 btrfs_info(fs_info, fmt, ##args); \
1334 btrfs_set_opt(fs_info->mount_opt, opt); \
1337 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1339 if (btrfs_test_opt(fs_info, opt)) \
1340 btrfs_info(fs_info, fmt, ##args); \
1341 btrfs_clear_opt(fs_info->mount_opt, opt); \
1344 #ifdef CONFIG_BTRFS_DEBUG
1346 btrfs_should_fragment_free_space(struct btrfs_root *root,
1347 struct btrfs_block_group_cache *block_group)
1349 return (btrfs_test_opt(root->fs_info, FRAGMENT_METADATA) &&
1350 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1351 (btrfs_test_opt(root->fs_info, FRAGMENT_DATA) &&
1352 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1357 * Requests for changes that need to be done during transaction commit.
1359 * Internal mount options that are used for special handling of the real
1360 * mount options (eg. cannot be set during remount and have to be set during
1361 * transaction commit)
1364 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1365 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1366 #define BTRFS_PENDING_COMMIT (2)
1368 #define btrfs_test_pending(info, opt) \
1369 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1370 #define btrfs_set_pending(info, opt) \
1371 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1372 #define btrfs_clear_pending(info, opt) \
1373 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1376 * Helpers for setting pending mount option changes.
1378 * Expects corresponding macros
1379 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1381 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1383 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1384 btrfs_info((info), fmt, ##args); \
1385 btrfs_set_pending((info), SET_##opt); \
1386 btrfs_clear_pending((info), CLEAR_##opt); \
1390 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1392 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1393 btrfs_info((info), fmt, ##args); \
1394 btrfs_set_pending((info), CLEAR_##opt); \
1395 btrfs_clear_pending((info), SET_##opt); \
1402 #define BTRFS_INODE_NODATASUM (1 << 0)
1403 #define BTRFS_INODE_NODATACOW (1 << 1)
1404 #define BTRFS_INODE_READONLY (1 << 2)
1405 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1406 #define BTRFS_INODE_PREALLOC (1 << 4)
1407 #define BTRFS_INODE_SYNC (1 << 5)
1408 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1409 #define BTRFS_INODE_APPEND (1 << 7)
1410 #define BTRFS_INODE_NODUMP (1 << 8)
1411 #define BTRFS_INODE_NOATIME (1 << 9)
1412 #define BTRFS_INODE_DIRSYNC (1 << 10)
1413 #define BTRFS_INODE_COMPRESS (1 << 11)
1415 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1417 struct btrfs_map_token {
1418 struct extent_buffer *eb;
1420 unsigned long offset;
1423 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1424 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1426 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1428 token->kaddr = NULL;
1431 /* some macros to generate set/get functions for the struct fields. This
1432 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1435 #define le8_to_cpu(v) (v)
1436 #define cpu_to_le8(v) (v)
1439 #define read_eb_member(eb, ptr, type, member, result) ( \
1440 read_extent_buffer(eb, (char *)(result), \
1441 ((unsigned long)(ptr)) + \
1442 offsetof(type, member), \
1443 sizeof(((type *)0)->member)))
1445 #define write_eb_member(eb, ptr, type, member, result) ( \
1446 write_extent_buffer(eb, (char *)(result), \
1447 ((unsigned long)(ptr)) + \
1448 offsetof(type, member), \
1449 sizeof(((type *)0)->member)))
1451 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1452 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1453 unsigned long off, \
1454 struct btrfs_map_token *token); \
1455 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1456 unsigned long off, u##bits val, \
1457 struct btrfs_map_token *token); \
1458 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1459 unsigned long off) \
1461 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1463 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1464 unsigned long off, u##bits val) \
1466 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1469 DECLARE_BTRFS_SETGET_BITS(8)
1470 DECLARE_BTRFS_SETGET_BITS(16)
1471 DECLARE_BTRFS_SETGET_BITS(32)
1472 DECLARE_BTRFS_SETGET_BITS(64)
1474 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1475 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1477 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1478 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1480 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1483 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1484 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1486 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1487 struct btrfs_map_token *token) \
1489 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1490 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1492 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1493 type *s, u##bits val, \
1494 struct btrfs_map_token *token) \
1496 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1497 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1500 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1501 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1503 type *p = page_address(eb->pages[0]); \
1504 u##bits res = le##bits##_to_cpu(p->member); \
1507 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1510 type *p = page_address(eb->pages[0]); \
1511 p->member = cpu_to_le##bits(val); \
1514 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1515 static inline u##bits btrfs_##name(type *s) \
1517 return le##bits##_to_cpu(s->member); \
1519 static inline void btrfs_set_##name(type *s, u##bits val) \
1521 s->member = cpu_to_le##bits(val); \
1524 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1525 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1526 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1527 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1528 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1529 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1531 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1532 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1533 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1534 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1535 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1536 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1538 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1539 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1541 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1543 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1545 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1547 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1549 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1550 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1552 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1554 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1556 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1559 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1561 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1564 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1566 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1569 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1570 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1571 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1572 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1573 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1574 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1575 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1576 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1577 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1578 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1579 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1581 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1583 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1586 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1587 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1588 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1590 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1592 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1594 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1596 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1597 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1599 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1601 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1602 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1604 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1607 unsigned long offset = (unsigned long)c;
1608 offset += offsetof(struct btrfs_chunk, stripe);
1609 offset += nr * sizeof(struct btrfs_stripe);
1610 return (struct btrfs_stripe *)offset;
1613 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1615 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1618 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1619 struct btrfs_chunk *c, int nr)
1621 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1624 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1625 struct btrfs_chunk *c, int nr)
1627 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1630 /* struct btrfs_block_group_item */
1631 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1633 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1635 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1636 struct btrfs_block_group_item, chunk_objectid, 64);
1638 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1639 struct btrfs_block_group_item, chunk_objectid, 64);
1640 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1641 struct btrfs_block_group_item, flags, 64);
1642 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1643 struct btrfs_block_group_item, flags, 64);
1645 /* struct btrfs_free_space_info */
1646 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1648 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1650 /* struct btrfs_inode_ref */
1651 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1652 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1654 /* struct btrfs_inode_extref */
1655 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1656 parent_objectid, 64);
1657 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1659 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1661 /* struct btrfs_inode_item */
1662 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1663 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1664 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1665 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1666 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1667 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1668 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1669 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1670 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1671 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1672 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1673 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1674 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1676 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1678 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1680 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1681 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1683 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1685 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1686 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1687 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1688 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1689 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1690 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1691 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1692 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1693 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1694 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1696 /* struct btrfs_dev_extent */
1697 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1699 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1700 chunk_objectid, 64);
1701 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1703 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1705 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1707 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1708 return (unsigned long)dev + ptr;
1711 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1712 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1714 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1716 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1719 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1721 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1722 struct btrfs_tree_block_info *item,
1723 struct btrfs_disk_key *key)
1725 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1728 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1729 struct btrfs_tree_block_info *item,
1730 struct btrfs_disk_key *key)
1732 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1735 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1737 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1739 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1741 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1744 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1747 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1749 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1752 static inline u32 btrfs_extent_inline_ref_size(int type)
1754 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1755 type == BTRFS_SHARED_BLOCK_REF_KEY)
1756 return sizeof(struct btrfs_extent_inline_ref);
1757 if (type == BTRFS_SHARED_DATA_REF_KEY)
1758 return sizeof(struct btrfs_shared_data_ref) +
1759 sizeof(struct btrfs_extent_inline_ref);
1760 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1761 return sizeof(struct btrfs_extent_data_ref) +
1762 offsetof(struct btrfs_extent_inline_ref, offset);
1767 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1768 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1770 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1771 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1773 /* struct btrfs_node */
1774 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1775 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1776 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1778 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1781 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1784 ptr = offsetof(struct btrfs_node, ptrs) +
1785 sizeof(struct btrfs_key_ptr) * nr;
1786 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1789 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1793 ptr = offsetof(struct btrfs_node, ptrs) +
1794 sizeof(struct btrfs_key_ptr) * nr;
1795 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1798 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1801 ptr = offsetof(struct btrfs_node, ptrs) +
1802 sizeof(struct btrfs_key_ptr) * nr;
1803 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1806 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1810 ptr = offsetof(struct btrfs_node, ptrs) +
1811 sizeof(struct btrfs_key_ptr) * nr;
1812 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1815 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1817 return offsetof(struct btrfs_node, ptrs) +
1818 sizeof(struct btrfs_key_ptr) * nr;
1821 void btrfs_node_key(struct extent_buffer *eb,
1822 struct btrfs_disk_key *disk_key, int nr);
1824 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1825 struct btrfs_disk_key *disk_key, int nr)
1828 ptr = btrfs_node_key_ptr_offset(nr);
1829 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1830 struct btrfs_key_ptr, key, disk_key);
1833 /* struct btrfs_item */
1834 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1835 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1836 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1837 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1839 static inline unsigned long btrfs_item_nr_offset(int nr)
1841 return offsetof(struct btrfs_leaf, items) +
1842 sizeof(struct btrfs_item) * nr;
1845 static inline struct btrfs_item *btrfs_item_nr(int nr)
1847 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1850 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1851 struct btrfs_item *item)
1853 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1856 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1858 return btrfs_item_end(eb, btrfs_item_nr(nr));
1861 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1863 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1866 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1868 return btrfs_item_size(eb, btrfs_item_nr(nr));
1871 static inline void btrfs_item_key(struct extent_buffer *eb,
1872 struct btrfs_disk_key *disk_key, int nr)
1874 struct btrfs_item *item = btrfs_item_nr(nr);
1875 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1878 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1879 struct btrfs_disk_key *disk_key, int nr)
1881 struct btrfs_item *item = btrfs_item_nr(nr);
1882 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1885 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1888 * struct btrfs_root_ref
1890 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1891 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1892 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1894 /* struct btrfs_dir_item */
1895 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1896 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1897 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1898 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1899 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1900 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1902 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1904 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1907 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1908 struct btrfs_dir_item *item,
1909 struct btrfs_disk_key *key)
1911 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1914 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1915 struct btrfs_dir_item *item,
1916 struct btrfs_disk_key *key)
1918 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1921 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1923 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1925 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1928 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1929 struct btrfs_free_space_header *h,
1930 struct btrfs_disk_key *key)
1932 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1935 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1936 struct btrfs_free_space_header *h,
1937 struct btrfs_disk_key *key)
1939 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1942 /* struct btrfs_disk_key */
1943 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1945 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1946 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1948 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1949 struct btrfs_disk_key *disk)
1951 cpu->offset = le64_to_cpu(disk->offset);
1952 cpu->type = disk->type;
1953 cpu->objectid = le64_to_cpu(disk->objectid);
1956 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1957 struct btrfs_key *cpu)
1959 disk->offset = cpu_to_le64(cpu->offset);
1960 disk->type = cpu->type;
1961 disk->objectid = cpu_to_le64(cpu->objectid);
1964 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1965 struct btrfs_key *key, int nr)
1967 struct btrfs_disk_key disk_key;
1968 btrfs_node_key(eb, &disk_key, nr);
1969 btrfs_disk_key_to_cpu(key, &disk_key);
1972 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1973 struct btrfs_key *key, int nr)
1975 struct btrfs_disk_key disk_key;
1976 btrfs_item_key(eb, &disk_key, nr);
1977 btrfs_disk_key_to_cpu(key, &disk_key);
1980 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1981 struct btrfs_dir_item *item,
1982 struct btrfs_key *key)
1984 struct btrfs_disk_key disk_key;
1985 btrfs_dir_item_key(eb, item, &disk_key);
1986 btrfs_disk_key_to_cpu(key, &disk_key);
1990 static inline u8 btrfs_key_type(struct btrfs_key *key)
1995 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2000 /* struct btrfs_header */
2001 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2002 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2004 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2005 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2006 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2007 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2008 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2010 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2011 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2013 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2015 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2017 return (btrfs_header_flags(eb) & flag) == flag;
2020 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2022 u64 flags = btrfs_header_flags(eb);
2023 btrfs_set_header_flags(eb, flags | flag);
2024 return (flags & flag) == flag;
2027 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2029 u64 flags = btrfs_header_flags(eb);
2030 btrfs_set_header_flags(eb, flags & ~flag);
2031 return (flags & flag) == flag;
2034 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2036 u64 flags = btrfs_header_flags(eb);
2037 return flags >> BTRFS_BACKREF_REV_SHIFT;
2040 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2043 u64 flags = btrfs_header_flags(eb);
2044 flags &= ~BTRFS_BACKREF_REV_MASK;
2045 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2046 btrfs_set_header_flags(eb, flags);
2049 static inline unsigned long btrfs_header_fsid(void)
2051 return offsetof(struct btrfs_header, fsid);
2054 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2056 return offsetof(struct btrfs_header, chunk_tree_uuid);
2059 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2061 return btrfs_header_level(eb) == 0;
2064 /* struct btrfs_root_item */
2065 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2067 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2068 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2069 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2071 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2073 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2074 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2075 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2076 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2077 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2078 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2079 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2080 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2082 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2084 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2086 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2088 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2090 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2093 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2095 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2098 static inline bool btrfs_root_dead(struct btrfs_root *root)
2100 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2103 /* struct btrfs_root_backup */
2104 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2106 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2108 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2109 tree_root_level, 8);
2111 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2113 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2114 chunk_root_gen, 64);
2115 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2116 chunk_root_level, 8);
2118 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2120 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2121 extent_root_gen, 64);
2122 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2123 extent_root_level, 8);
2125 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2127 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2129 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2132 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2134 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2136 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2139 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2141 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2143 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2144 csum_root_level, 8);
2145 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2147 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2149 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2152 /* struct btrfs_balance_item */
2153 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2155 static inline void btrfs_balance_data(struct extent_buffer *eb,
2156 struct btrfs_balance_item *bi,
2157 struct btrfs_disk_balance_args *ba)
2159 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2162 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2163 struct btrfs_balance_item *bi,
2164 struct btrfs_disk_balance_args *ba)
2166 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2169 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2170 struct btrfs_balance_item *bi,
2171 struct btrfs_disk_balance_args *ba)
2173 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2176 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2177 struct btrfs_balance_item *bi,
2178 struct btrfs_disk_balance_args *ba)
2180 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2183 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2184 struct btrfs_balance_item *bi,
2185 struct btrfs_disk_balance_args *ba)
2187 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2190 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2191 struct btrfs_balance_item *bi,
2192 struct btrfs_disk_balance_args *ba)
2194 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2198 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2199 struct btrfs_disk_balance_args *disk)
2201 memset(cpu, 0, sizeof(*cpu));
2203 cpu->profiles = le64_to_cpu(disk->profiles);
2204 cpu->usage = le64_to_cpu(disk->usage);
2205 cpu->devid = le64_to_cpu(disk->devid);
2206 cpu->pstart = le64_to_cpu(disk->pstart);
2207 cpu->pend = le64_to_cpu(disk->pend);
2208 cpu->vstart = le64_to_cpu(disk->vstart);
2209 cpu->vend = le64_to_cpu(disk->vend);
2210 cpu->target = le64_to_cpu(disk->target);
2211 cpu->flags = le64_to_cpu(disk->flags);
2212 cpu->limit = le64_to_cpu(disk->limit);
2216 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2217 struct btrfs_balance_args *cpu)
2219 memset(disk, 0, sizeof(*disk));
2221 disk->profiles = cpu_to_le64(cpu->profiles);
2222 disk->usage = cpu_to_le64(cpu->usage);
2223 disk->devid = cpu_to_le64(cpu->devid);
2224 disk->pstart = cpu_to_le64(cpu->pstart);
2225 disk->pend = cpu_to_le64(cpu->pend);
2226 disk->vstart = cpu_to_le64(cpu->vstart);
2227 disk->vend = cpu_to_le64(cpu->vend);
2228 disk->target = cpu_to_le64(cpu->target);
2229 disk->flags = cpu_to_le64(cpu->flags);
2230 disk->limit = cpu_to_le64(cpu->limit);
2233 /* struct btrfs_super_block */
2234 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2235 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2236 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2238 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2239 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2240 struct btrfs_super_block, sys_chunk_array_size, 32);
2241 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2242 struct btrfs_super_block, chunk_root_generation, 64);
2243 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2245 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2247 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2248 chunk_root_level, 8);
2249 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2251 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2252 log_root_transid, 64);
2253 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2255 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2257 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2259 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2261 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2263 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2265 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2266 root_dir_objectid, 64);
2267 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2269 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2271 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2272 compat_ro_flags, 64);
2273 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2274 incompat_flags, 64);
2275 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2277 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2278 cache_generation, 64);
2279 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2280 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2281 uuid_tree_generation, 64);
2283 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2285 u16 t = btrfs_super_csum_type(s);
2287 * csum type is validated at mount time
2289 return btrfs_csum_sizes[t];
2292 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2294 return offsetof(struct btrfs_leaf, items);
2297 /* struct btrfs_file_extent_item */
2298 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2299 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2300 struct btrfs_file_extent_item, disk_bytenr, 64);
2301 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2302 struct btrfs_file_extent_item, offset, 64);
2303 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2304 struct btrfs_file_extent_item, generation, 64);
2305 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2306 struct btrfs_file_extent_item, num_bytes, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2308 struct btrfs_file_extent_item, disk_num_bytes, 64);
2309 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2310 struct btrfs_file_extent_item, compression, 8);
2312 static inline unsigned long
2313 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2315 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2318 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2320 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2323 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2325 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2327 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2328 disk_num_bytes, 64);
2329 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2331 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2333 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2335 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2337 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2339 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2340 other_encoding, 16);
2343 * this returns the number of bytes used by the item on disk, minus the
2344 * size of any extent headers. If a file is compressed on disk, this is
2345 * the compressed size
2347 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2348 struct btrfs_item *e)
2350 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2353 /* this returns the number of file bytes represented by the inline item.
2354 * If an item is compressed, this is the uncompressed size
2356 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2358 struct btrfs_file_extent_item *fi)
2360 struct btrfs_map_token token;
2362 btrfs_init_map_token(&token);
2364 * return the space used on disk if this item isn't
2365 * compressed or encoded
2367 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
2368 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
2369 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
2370 return btrfs_file_extent_inline_item_len(eb,
2371 btrfs_item_nr(slot));
2374 /* otherwise use the ram bytes field */
2375 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
2379 /* btrfs_dev_stats_item */
2380 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2381 struct btrfs_dev_stats_item *ptr,
2386 read_extent_buffer(eb, &val,
2387 offsetof(struct btrfs_dev_stats_item, values) +
2388 ((unsigned long)ptr) + (index * sizeof(u64)),
2393 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2394 struct btrfs_dev_stats_item *ptr,
2397 write_extent_buffer(eb, &val,
2398 offsetof(struct btrfs_dev_stats_item, values) +
2399 ((unsigned long)ptr) + (index * sizeof(u64)),
2403 /* btrfs_qgroup_status_item */
2404 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2406 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2408 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2410 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2413 /* btrfs_qgroup_info_item */
2414 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2416 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2417 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2419 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2420 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2423 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2424 struct btrfs_qgroup_info_item, generation, 64);
2425 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2427 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2428 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2429 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2431 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2432 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2434 /* btrfs_qgroup_limit_item */
2435 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2437 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2439 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2441 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2443 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2446 /* btrfs_dev_replace_item */
2447 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2448 struct btrfs_dev_replace_item, src_devid, 64);
2449 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2450 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2452 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2454 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2456 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2458 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2459 num_write_errors, 64);
2460 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2461 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2463 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2465 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2468 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2469 struct btrfs_dev_replace_item, src_devid, 64);
2470 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2471 struct btrfs_dev_replace_item,
2472 cont_reading_from_srcdev_mode, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2474 struct btrfs_dev_replace_item, replace_state, 64);
2475 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2476 struct btrfs_dev_replace_item, time_started, 64);
2477 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2478 struct btrfs_dev_replace_item, time_stopped, 64);
2479 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2480 struct btrfs_dev_replace_item, num_write_errors, 64);
2481 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2482 struct btrfs_dev_replace_item,
2483 num_uncorrectable_read_errors, 64);
2484 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2485 struct btrfs_dev_replace_item, cursor_left, 64);
2486 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2487 struct btrfs_dev_replace_item, cursor_right, 64);
2489 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2491 return sb->s_fs_info;
2494 /* helper function to cast into the data area of the leaf. */
2495 #define btrfs_item_ptr(leaf, slot, type) \
2496 ((type *)(btrfs_leaf_data(leaf) + \
2497 btrfs_item_offset_nr(leaf, slot)))
2499 #define btrfs_item_ptr_offset(leaf, slot) \
2500 ((unsigned long)(btrfs_leaf_data(leaf) + \
2501 btrfs_item_offset_nr(leaf, slot)))
2503 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2505 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2506 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2509 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2511 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2516 u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
2518 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2521 return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2525 * Doing a truncate won't result in new nodes or leaves, just what we need for
2528 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2531 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
2534 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2535 struct btrfs_root *root);
2536 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2537 struct btrfs_root *root);
2538 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2540 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2541 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2542 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2543 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2544 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2545 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2546 struct btrfs_root *root, unsigned long count);
2547 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
2548 unsigned long count, u64 transid, int wait);
2549 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
2550 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2551 struct btrfs_root *root, u64 bytenr,
2552 u64 offset, int metadata, u64 *refs, u64 *flags);
2553 int btrfs_pin_extent(struct btrfs_root *root,
2554 u64 bytenr, u64 num, int reserved);
2555 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
2556 u64 bytenr, u64 num_bytes);
2557 int btrfs_exclude_logged_extents(struct btrfs_root *root,
2558 struct extent_buffer *eb);
2559 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2560 struct btrfs_root *root,
2561 u64 objectid, u64 offset, u64 bytenr);
2562 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2563 struct btrfs_fs_info *info,
2565 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2566 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2567 int get_block_group_index(struct btrfs_block_group_cache *cache);
2568 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2569 struct btrfs_root *root, u64 parent,
2571 struct btrfs_disk_key *key, int level,
2572 u64 hint, u64 empty_size);
2573 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2574 struct btrfs_root *root,
2575 struct extent_buffer *buf,
2576 u64 parent, int last_ref);
2577 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2578 struct btrfs_root *root,
2579 u64 root_objectid, u64 owner,
2580 u64 offset, u64 ram_bytes,
2581 struct btrfs_key *ins);
2582 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2583 struct btrfs_root *root,
2584 u64 root_objectid, u64 owner, u64 offset,
2585 struct btrfs_key *ins);
2586 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2587 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2588 struct btrfs_key *ins, int is_data, int delalloc);
2589 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2590 struct extent_buffer *buf, int full_backref);
2591 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2592 struct extent_buffer *buf, int full_backref);
2593 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2594 struct btrfs_root *root,
2595 u64 bytenr, u64 num_bytes, u64 flags,
2596 int level, int is_data);
2597 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2598 struct btrfs_root *root,
2599 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2600 u64 owner, u64 offset);
2602 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
2604 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2605 u64 start, u64 len);
2606 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2607 struct btrfs_root *root);
2608 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2609 struct btrfs_root *root);
2610 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2611 struct btrfs_root *root,
2612 u64 bytenr, u64 num_bytes, u64 parent,
2613 u64 root_objectid, u64 owner, u64 offset);
2615 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
2616 struct btrfs_root *root);
2617 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2618 struct btrfs_root *root);
2619 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2620 struct btrfs_root *root);
2621 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2622 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2623 int btrfs_read_block_groups(struct btrfs_root *root);
2624 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2625 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2626 struct btrfs_root *root, u64 bytes_used,
2627 u64 type, u64 chunk_objectid, u64 chunk_offset,
2629 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2630 struct btrfs_fs_info *fs_info,
2631 const u64 chunk_offset);
2632 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2633 struct btrfs_root *root, u64 group_start,
2634 struct extent_map *em);
2635 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2636 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2637 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2638 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
2639 struct btrfs_root *root);
2640 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2641 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2643 enum btrfs_reserve_flush_enum {
2644 /* If we are in the transaction, we can't flush anything.*/
2645 BTRFS_RESERVE_NO_FLUSH,
2647 * Flushing delalloc may cause deadlock somewhere, in this
2648 * case, use FLUSH LIMIT
2650 BTRFS_RESERVE_FLUSH_LIMIT,
2651 BTRFS_RESERVE_FLUSH_ALL,
2654 enum btrfs_flush_state {
2655 FLUSH_DELAYED_ITEMS_NR = 1,
2656 FLUSH_DELAYED_ITEMS = 2,
2658 FLUSH_DELALLOC_WAIT = 4,
2663 int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
2664 int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
2665 void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
2666 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2668 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2669 struct btrfs_root *root);
2670 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2671 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2672 struct inode *inode);
2673 void btrfs_orphan_release_metadata(struct inode *inode);
2674 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2675 struct btrfs_block_rsv *rsv,
2677 u64 *qgroup_reserved, bool use_global_rsv);
2678 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2679 struct btrfs_block_rsv *rsv,
2680 u64 qgroup_reserved);
2681 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2682 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2683 int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
2684 void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
2685 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2686 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
2687 unsigned short type);
2688 void btrfs_free_block_rsv(struct btrfs_root *root,
2689 struct btrfs_block_rsv *rsv);
2690 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
2691 int btrfs_block_rsv_add(struct btrfs_root *root,
2692 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2693 enum btrfs_reserve_flush_enum flush);
2694 int btrfs_block_rsv_check(struct btrfs_root *root,
2695 struct btrfs_block_rsv *block_rsv, int min_factor);
2696 int btrfs_block_rsv_refill(struct btrfs_root *root,
2697 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2698 enum btrfs_reserve_flush_enum flush);
2699 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2700 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2702 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2703 struct btrfs_block_rsv *dest, u64 num_bytes,
2705 void btrfs_block_rsv_release(struct btrfs_root *root,
2706 struct btrfs_block_rsv *block_rsv,
2708 int btrfs_inc_block_group_ro(struct btrfs_root *root,
2709 struct btrfs_block_group_cache *cache);
2710 void btrfs_dec_block_group_ro(struct btrfs_root *root,
2711 struct btrfs_block_group_cache *cache);
2712 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2713 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2714 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2715 u64 start, u64 end);
2716 int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
2717 u64 num_bytes, u64 *actual_bytes);
2718 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2719 struct btrfs_root *root, u64 type);
2720 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2722 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2723 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2724 struct btrfs_fs_info *fs_info);
2725 int __get_raid_index(u64 flags);
2726 int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
2727 void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
2728 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2729 void check_system_chunk(struct btrfs_trans_handle *trans,
2730 struct btrfs_root *root,
2732 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2733 struct btrfs_fs_info *info, u64 start, u64 end);
2736 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2737 int level, int *slot);
2738 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2739 int btrfs_previous_item(struct btrfs_root *root,
2740 struct btrfs_path *path, u64 min_objectid,
2742 int btrfs_previous_extent_item(struct btrfs_root *root,
2743 struct btrfs_path *path, u64 min_objectid);
2744 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2745 struct btrfs_path *path,
2746 struct btrfs_key *new_key);
2747 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2748 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2749 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2750 struct btrfs_key *key, int lowest_level,
2752 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2753 struct btrfs_path *path,
2755 enum btrfs_compare_tree_result {
2756 BTRFS_COMPARE_TREE_NEW,
2757 BTRFS_COMPARE_TREE_DELETED,
2758 BTRFS_COMPARE_TREE_CHANGED,
2759 BTRFS_COMPARE_TREE_SAME,
2761 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
2762 struct btrfs_root *right_root,
2763 struct btrfs_path *left_path,
2764 struct btrfs_path *right_path,
2765 struct btrfs_key *key,
2766 enum btrfs_compare_tree_result result,
2768 int btrfs_compare_trees(struct btrfs_root *left_root,
2769 struct btrfs_root *right_root,
2770 btrfs_changed_cb_t cb, void *ctx);
2771 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2772 struct btrfs_root *root, struct extent_buffer *buf,
2773 struct extent_buffer *parent, int parent_slot,
2774 struct extent_buffer **cow_ret);
2775 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2776 struct btrfs_root *root,
2777 struct extent_buffer *buf,
2778 struct extent_buffer **cow_ret, u64 new_root_objectid);
2779 int btrfs_block_can_be_shared(struct btrfs_root *root,
2780 struct extent_buffer *buf);
2781 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2783 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2784 u32 new_size, int from_end);
2785 int btrfs_split_item(struct btrfs_trans_handle *trans,
2786 struct btrfs_root *root,
2787 struct btrfs_path *path,
2788 struct btrfs_key *new_key,
2789 unsigned long split_offset);
2790 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2791 struct btrfs_root *root,
2792 struct btrfs_path *path,
2793 struct btrfs_key *new_key);
2794 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2795 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2796 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2797 *root, struct btrfs_key *key, struct btrfs_path *p, int
2799 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
2800 struct btrfs_path *p, u64 time_seq);
2801 int btrfs_search_slot_for_read(struct btrfs_root *root,
2802 struct btrfs_key *key, struct btrfs_path *p,
2803 int find_higher, int return_any);
2804 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2805 struct btrfs_root *root, struct extent_buffer *parent,
2806 int start_slot, u64 *last_ret,
2807 struct btrfs_key *progress);
2808 void btrfs_release_path(struct btrfs_path *p);
2809 struct btrfs_path *btrfs_alloc_path(void);
2810 void btrfs_free_path(struct btrfs_path *p);
2811 void btrfs_set_path_blocking(struct btrfs_path *p);
2812 void btrfs_clear_path_blocking(struct btrfs_path *p,
2813 struct extent_buffer *held, int held_rw);
2814 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2816 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2817 struct btrfs_path *path, int slot, int nr);
2818 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2819 struct btrfs_root *root,
2820 struct btrfs_path *path)
2822 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2825 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2826 struct btrfs_key *cpu_key, u32 *data_size,
2827 u32 total_data, u32 total_size, int nr);
2828 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2829 *root, struct btrfs_key *key, void *data, u32 data_size);
2830 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2831 struct btrfs_root *root,
2832 struct btrfs_path *path,
2833 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2835 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2836 struct btrfs_root *root,
2837 struct btrfs_path *path,
2838 struct btrfs_key *key,
2841 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2844 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2845 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2846 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2848 static inline int btrfs_next_old_item(struct btrfs_root *root,
2849 struct btrfs_path *p, u64 time_seq)
2852 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2853 return btrfs_next_old_leaf(root, p, time_seq);
2856 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2858 return btrfs_next_old_item(root, p, 0);
2860 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2861 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2862 struct btrfs_block_rsv *block_rsv,
2863 int update_ref, int for_reloc);
2864 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2865 struct btrfs_root *root,
2866 struct extent_buffer *node,
2867 struct extent_buffer *parent);
2868 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2871 * Get synced with close_ctree()
2874 return fs_info->closing;
2878 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2879 * anything except sleeping. This function is used to check the status of
2882 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
2884 return (root->fs_info->sb->s_flags & MS_RDONLY ||
2885 btrfs_fs_closing(root->fs_info));
2888 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2890 kfree(fs_info->balance_ctl);
2891 kfree(fs_info->delayed_root);
2892 kfree(fs_info->extent_root);
2893 kfree(fs_info->tree_root);
2894 kfree(fs_info->chunk_root);
2895 kfree(fs_info->dev_root);
2896 kfree(fs_info->csum_root);
2897 kfree(fs_info->quota_root);
2898 kfree(fs_info->uuid_root);
2899 kfree(fs_info->free_space_root);
2900 kfree(fs_info->super_copy);
2901 kfree(fs_info->super_for_commit);
2902 security_free_mnt_opts(&fs_info->security_opts);
2906 /* tree mod log functions from ctree.c */
2907 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2908 struct seq_list *elem);
2909 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2910 struct seq_list *elem);
2911 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2914 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2915 struct btrfs_root *tree_root,
2916 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2917 const char *name, int name_len);
2918 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2919 struct btrfs_root *tree_root,
2920 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2921 const char *name, int name_len);
2922 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2923 struct btrfs_key *key);
2924 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2925 *root, struct btrfs_key *key, struct btrfs_root_item
2927 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2928 struct btrfs_root *root,
2929 struct btrfs_key *key,
2930 struct btrfs_root_item *item);
2931 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
2932 struct btrfs_path *path, struct btrfs_root_item *root_item,
2933 struct btrfs_key *root_key);
2934 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2935 void btrfs_set_root_node(struct btrfs_root_item *item,
2936 struct extent_buffer *node);
2937 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2938 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2939 struct btrfs_root *root);
2942 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
2943 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
2945 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
2946 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
2948 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2949 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2953 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2954 const char *name, int name_len);
2955 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2956 struct btrfs_root *root, const char *name,
2957 int name_len, struct inode *dir,
2958 struct btrfs_key *location, u8 type, u64 index);
2959 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2960 struct btrfs_root *root,
2961 struct btrfs_path *path, u64 dir,
2962 const char *name, int name_len,
2964 struct btrfs_dir_item *
2965 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2966 struct btrfs_root *root,
2967 struct btrfs_path *path, u64 dir,
2968 u64 objectid, const char *name, int name_len,
2970 struct btrfs_dir_item *
2971 btrfs_search_dir_index_item(struct btrfs_root *root,
2972 struct btrfs_path *path, u64 dirid,
2973 const char *name, int name_len);
2974 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2975 struct btrfs_root *root,
2976 struct btrfs_path *path,
2977 struct btrfs_dir_item *di);
2978 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2979 struct btrfs_root *root,
2980 struct btrfs_path *path, u64 objectid,
2981 const char *name, u16 name_len,
2982 const void *data, u16 data_len);
2983 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2984 struct btrfs_root *root,
2985 struct btrfs_path *path, u64 dir,
2986 const char *name, u16 name_len,
2988 int verify_dir_item(struct btrfs_root *root,
2989 struct extent_buffer *leaf,
2990 struct btrfs_dir_item *dir_item);
2991 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2992 struct btrfs_path *path,
2997 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2998 struct btrfs_root *root, u64 offset);
2999 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3000 struct btrfs_root *root, u64 offset);
3001 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3004 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3005 struct btrfs_root *root,
3006 const char *name, int name_len,
3007 u64 inode_objectid, u64 ref_objectid, u64 index);
3008 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3009 struct btrfs_root *root,
3010 const char *name, int name_len,
3011 u64 inode_objectid, u64 ref_objectid, u64 *index);
3012 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3013 struct btrfs_root *root,
3014 struct btrfs_path *path, u64 objectid);
3015 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3016 *root, struct btrfs_path *path,
3017 struct btrfs_key *location, int mod);
3019 struct btrfs_inode_extref *
3020 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3021 struct btrfs_root *root,
3022 struct btrfs_path *path,
3023 const char *name, int name_len,
3024 u64 inode_objectid, u64 ref_objectid, int ins_len,
3027 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3028 u64 ref_objectid, const char *name,
3030 struct btrfs_inode_extref **extref_ret);
3033 struct btrfs_dio_private;
3034 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3035 struct btrfs_root *root, u64 bytenr, u64 len);
3036 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3037 struct bio *bio, u32 *dst);
3038 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3039 struct bio *bio, u64 logical_offset);
3040 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3041 struct btrfs_root *root,
3042 u64 objectid, u64 pos,
3043 u64 disk_offset, u64 disk_num_bytes,
3044 u64 num_bytes, u64 offset, u64 ram_bytes,
3045 u8 compression, u8 encryption, u16 other_encoding);
3046 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3047 struct btrfs_root *root,
3048 struct btrfs_path *path, u64 objectid,
3049 u64 bytenr, int mod);
3050 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3051 struct btrfs_root *root,
3052 struct btrfs_ordered_sum *sums);
3053 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3054 struct bio *bio, u64 file_start, int contig);
3055 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3056 struct list_head *list, int search_commit);
3057 void btrfs_extent_item_to_extent_map(struct inode *inode,
3058 const struct btrfs_path *path,
3059 struct btrfs_file_extent_item *fi,
3060 const bool new_inline,
3061 struct extent_map *em);
3064 struct btrfs_delalloc_work {
3065 struct inode *inode;
3067 struct completion completion;
3068 struct list_head list;
3069 struct btrfs_work work;
3072 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3074 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3076 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3077 size_t pg_offset, u64 start, u64 len,
3079 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3080 u64 *orig_start, u64 *orig_block_len,
3083 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3084 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3085 #define ClearPageChecked ClearPageFsMisc
3086 #define SetPageChecked SetPageFsMisc
3087 #define PageChecked PageFsMisc
3090 /* This forces readahead on a given range of bytes in an inode */
3091 static inline void btrfs_force_ra(struct address_space *mapping,
3092 struct file_ra_state *ra, struct file *file,
3093 pgoff_t offset, unsigned long req_size)
3095 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3098 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3099 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3100 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3101 struct btrfs_root *root,
3102 struct inode *dir, struct inode *inode,
3103 const char *name, int name_len);
3104 int btrfs_add_link(struct btrfs_trans_handle *trans,
3105 struct inode *parent_inode, struct inode *inode,
3106 const char *name, int name_len, int add_backref, u64 index);
3107 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3108 struct btrfs_root *root,
3109 struct inode *dir, u64 objectid,
3110 const char *name, int name_len);
3111 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3113 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root,
3115 struct inode *inode, u64 new_size,
3118 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3119 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3121 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3122 struct extent_state **cached_state, int dedupe);
3123 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3124 struct btrfs_root *new_root,
3125 struct btrfs_root *parent_root,
3127 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3128 size_t size, struct bio *bio,
3129 unsigned long bio_flags);
3130 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3131 int btrfs_readpage(struct file *file, struct page *page);
3132 void btrfs_evict_inode(struct inode *inode);
3133 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3134 struct inode *btrfs_alloc_inode(struct super_block *sb);
3135 void btrfs_destroy_inode(struct inode *inode);
3136 int btrfs_drop_inode(struct inode *inode);
3137 int btrfs_init_cachep(void);
3138 void btrfs_destroy_cachep(void);
3139 long btrfs_ioctl_trans_end(struct file *file);
3140 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3141 struct btrfs_root *root, int *was_new);
3142 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3143 size_t pg_offset, u64 start, u64 end,
3145 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3146 struct btrfs_root *root,
3147 struct inode *inode);
3148 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3149 struct btrfs_root *root, struct inode *inode);
3150 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3151 int btrfs_orphan_cleanup(struct btrfs_root *root);
3152 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root);
3154 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3155 void btrfs_invalidate_inodes(struct btrfs_root *root);
3156 void btrfs_add_delayed_iput(struct inode *inode);
3157 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3158 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3159 u64 start, u64 num_bytes, u64 min_size,
3160 loff_t actual_len, u64 *alloc_hint);
3161 int btrfs_prealloc_file_range_trans(struct inode *inode,
3162 struct btrfs_trans_handle *trans, int mode,
3163 u64 start, u64 num_bytes, u64 min_size,
3164 loff_t actual_len, u64 *alloc_hint);
3165 int btrfs_inode_check_errors(struct inode *inode);
3166 extern const struct dentry_operations btrfs_dentry_operations;
3167 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3168 void btrfs_test_inode_set_ops(struct inode *inode);
3172 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3173 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3174 int btrfs_ioctl_get_supported_features(void __user *arg);
3175 void btrfs_update_iflags(struct inode *inode);
3176 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3177 int btrfs_is_empty_uuid(u8 *uuid);
3178 int btrfs_defrag_file(struct inode *inode, struct file *file,
3179 struct btrfs_ioctl_defrag_range_args *range,
3180 u64 newer_than, unsigned long max_pages);
3181 void btrfs_get_block_group_info(struct list_head *groups_list,
3182 struct btrfs_ioctl_space_info *space);
3183 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3184 struct btrfs_ioctl_balance_args *bargs);
3185 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
3186 struct file *dst_file, u64 dst_loff);
3189 int btrfs_auto_defrag_init(void);
3190 void btrfs_auto_defrag_exit(void);
3191 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3192 struct inode *inode);
3193 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3194 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3195 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3196 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3198 extern const struct file_operations btrfs_file_operations;
3199 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3200 struct btrfs_root *root, struct inode *inode,
3201 struct btrfs_path *path, u64 start, u64 end,
3202 u64 *drop_end, int drop_cache,
3204 u32 extent_item_size,
3206 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3207 struct btrfs_root *root, struct inode *inode, u64 start,
3208 u64 end, int drop_cache);
3209 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3210 struct inode *inode, u64 start, u64 end);
3211 int btrfs_release_file(struct inode *inode, struct file *file);
3212 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3213 struct page **pages, size_t num_pages,
3214 loff_t pos, size_t write_bytes,
3215 struct extent_state **cached);
3216 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3217 ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
3218 struct file *file_out, loff_t pos_out,
3219 size_t len, unsigned int flags);
3220 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3221 struct file *file_out, loff_t pos_out, u64 len);
3224 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3225 struct btrfs_root *root);
3228 int btrfs_init_sysfs(void);
3229 void btrfs_exit_sysfs(void);
3230 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3231 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3234 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3237 int btrfs_parse_options(struct btrfs_root *root, char *options,
3238 unsigned long new_flags);
3239 int btrfs_sync_fs(struct super_block *sb, int wait);
3241 #ifdef CONFIG_PRINTK
3243 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3245 static inline __printf(2, 3)
3246 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3251 #define btrfs_emerg(fs_info, fmt, args...) \
3252 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3253 #define btrfs_alert(fs_info, fmt, args...) \
3254 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3255 #define btrfs_crit(fs_info, fmt, args...) \
3256 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3257 #define btrfs_err(fs_info, fmt, args...) \
3258 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3259 #define btrfs_warn(fs_info, fmt, args...) \
3260 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3261 #define btrfs_notice(fs_info, fmt, args...) \
3262 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3263 #define btrfs_info(fs_info, fmt, args...) \
3264 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3267 * Wrappers that use printk_in_rcu
3269 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3270 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3271 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3272 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3273 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3274 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3275 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3276 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3277 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3278 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3279 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3280 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3281 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3282 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3285 * Wrappers that use a ratelimited printk_in_rcu
3287 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3288 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3289 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3290 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3291 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3292 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3293 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3294 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3295 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3296 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3297 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3298 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3299 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3300 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3303 * Wrappers that use a ratelimited printk
3305 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3306 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3307 #define btrfs_alert_rl(fs_info, fmt, args...) \
3308 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3309 #define btrfs_crit_rl(fs_info, fmt, args...) \
3310 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3311 #define btrfs_err_rl(fs_info, fmt, args...) \
3312 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3313 #define btrfs_warn_rl(fs_info, fmt, args...) \
3314 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3315 #define btrfs_notice_rl(fs_info, fmt, args...) \
3316 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3317 #define btrfs_info_rl(fs_info, fmt, args...) \
3318 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3320 #if defined(CONFIG_DYNAMIC_DEBUG)
3321 #define btrfs_debug(fs_info, fmt, args...) \
3323 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3324 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3325 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3327 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3329 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3330 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3331 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3333 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3335 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3336 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3337 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3340 #define btrfs_debug_rl(fs_info, fmt, args...) \
3342 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3343 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3344 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3347 #elif defined(DEBUG)
3348 #define btrfs_debug(fs_info, fmt, args...) \
3349 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3350 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3351 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3352 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3353 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3354 #define btrfs_debug_rl(fs_info, fmt, args...) \
3355 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3357 #define btrfs_debug(fs_info, fmt, args...) \
3358 no_printk(KERN_DEBUG fmt, ##args)
3359 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3360 no_printk(KERN_DEBUG fmt, ##args)
3361 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3362 no_printk(KERN_DEBUG fmt, ##args)
3363 #define btrfs_debug_rl(fs_info, fmt, args...) \
3364 no_printk(KERN_DEBUG fmt, ##args)
3367 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3370 btrfs_printk(fs_info, fmt, ##args); \
3371 rcu_read_unlock(); \
3374 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3376 static DEFINE_RATELIMIT_STATE(_rs, \
3377 DEFAULT_RATELIMIT_INTERVAL, \
3378 DEFAULT_RATELIMIT_BURST); \
3379 if (__ratelimit(&_rs)) \
3380 btrfs_printk(fs_info, fmt, ##args); \
3383 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3386 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3387 rcu_read_unlock(); \
3390 #ifdef CONFIG_BTRFS_ASSERT
3393 static inline void assfail(char *expr, char *file, int line)
3395 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
3400 #define ASSERT(expr) \
3401 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3403 #define ASSERT(expr) ((void)0)
3408 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3409 unsigned int line, int errno, const char *fmt, ...);
3411 const char *btrfs_decode_error(int errno);
3414 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3415 const char *function,
3416 unsigned int line, int errno);
3419 * Call btrfs_abort_transaction as early as possible when an error condition is
3420 * detected, that way the exact line number is reported.
3422 #define btrfs_abort_transaction(trans, errno) \
3424 /* Report first abort since mount */ \
3425 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3426 &((trans)->fs_info->fs_state))) { \
3427 WARN(1, KERN_DEBUG \
3428 "BTRFS: Transaction aborted (error %d)\n", \
3431 __btrfs_abort_transaction((trans), __func__, \
3432 __LINE__, (errno)); \
3435 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3437 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3438 (errno), fmt, ##args); \
3443 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3444 unsigned int line, int errno, const char *fmt, ...);
3446 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3447 * will panic(). Otherwise we BUG() here.
3449 #define btrfs_panic(fs_info, errno, fmt, args...) \
3451 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3456 /* compatibility and incompatibility defines */
3458 #define btrfs_set_fs_incompat(__fs_info, opt) \
3459 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3461 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3464 struct btrfs_super_block *disk_super;
3467 disk_super = fs_info->super_copy;
3468 features = btrfs_super_incompat_flags(disk_super);
3469 if (!(features & flag)) {
3470 spin_lock(&fs_info->super_lock);
3471 features = btrfs_super_incompat_flags(disk_super);
3472 if (!(features & flag)) {
3474 btrfs_set_super_incompat_flags(disk_super, features);
3475 btrfs_info(fs_info, "setting %llu feature flag",
3478 spin_unlock(&fs_info->super_lock);
3482 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3483 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3485 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3488 struct btrfs_super_block *disk_super;
3491 disk_super = fs_info->super_copy;
3492 features = btrfs_super_incompat_flags(disk_super);
3493 if (features & flag) {
3494 spin_lock(&fs_info->super_lock);
3495 features = btrfs_super_incompat_flags(disk_super);
3496 if (features & flag) {
3498 btrfs_set_super_incompat_flags(disk_super, features);
3499 btrfs_info(fs_info, "clearing %llu feature flag",
3502 spin_unlock(&fs_info->super_lock);
3506 #define btrfs_fs_incompat(fs_info, opt) \
3507 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3509 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3511 struct btrfs_super_block *disk_super;
3512 disk_super = fs_info->super_copy;
3513 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3516 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3517 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3519 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3522 struct btrfs_super_block *disk_super;
3525 disk_super = fs_info->super_copy;
3526 features = btrfs_super_compat_ro_flags(disk_super);
3527 if (!(features & flag)) {
3528 spin_lock(&fs_info->super_lock);
3529 features = btrfs_super_compat_ro_flags(disk_super);
3530 if (!(features & flag)) {
3532 btrfs_set_super_compat_ro_flags(disk_super, features);
3533 btrfs_info(fs_info, "setting %llu ro feature flag",
3536 spin_unlock(&fs_info->super_lock);
3540 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3541 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3543 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3546 struct btrfs_super_block *disk_super;
3549 disk_super = fs_info->super_copy;
3550 features = btrfs_super_compat_ro_flags(disk_super);
3551 if (features & flag) {
3552 spin_lock(&fs_info->super_lock);
3553 features = btrfs_super_compat_ro_flags(disk_super);
3554 if (features & flag) {
3556 btrfs_set_super_compat_ro_flags(disk_super, features);
3557 btrfs_info(fs_info, "clearing %llu ro feature flag",
3560 spin_unlock(&fs_info->super_lock);
3564 #define btrfs_fs_compat_ro(fs_info, opt) \
3565 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3567 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3569 struct btrfs_super_block *disk_super;
3570 disk_super = fs_info->super_copy;
3571 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3575 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3576 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3577 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3578 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3579 struct inode *inode, struct inode *dir);
3581 #define btrfs_get_acl NULL
3582 #define btrfs_set_acl NULL
3583 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3584 struct inode *inode, struct inode *dir)
3591 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3592 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3593 struct btrfs_root *root);
3594 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3595 struct btrfs_root *root);
3596 int btrfs_recover_relocation(struct btrfs_root *root);
3597 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3598 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3599 struct btrfs_root *root, struct extent_buffer *buf,
3600 struct extent_buffer *cow);
3601 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3602 u64 *bytes_to_reserve);
3603 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3604 struct btrfs_pending_snapshot *pending);
3607 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3608 u64 end, struct btrfs_scrub_progress *progress,
3609 int readonly, int is_dev_replace);
3610 void btrfs_scrub_pause(struct btrfs_root *root);
3611 void btrfs_scrub_continue(struct btrfs_root *root);
3612 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3613 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3614 struct btrfs_device *dev);
3615 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3616 struct btrfs_scrub_progress *progress);
3619 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3620 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3621 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3623 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3625 btrfs_bio_counter_sub(fs_info, 1);
3629 struct reada_control {
3630 struct btrfs_root *root; /* tree to prefetch */
3631 struct btrfs_key key_start;
3632 struct btrfs_key key_end; /* exclusive */
3635 wait_queue_head_t wait;
3637 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3638 struct btrfs_key *start, struct btrfs_key *end);
3639 int btrfs_reada_wait(void *handle);
3640 void btrfs_reada_detach(void *handle);
3641 int btree_readahead_hook(struct btrfs_fs_info *fs_info,
3642 struct extent_buffer *eb, u64 start, int err);
3644 static inline int is_fstree(u64 rootid)
3646 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3647 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3648 !btrfs_qgroup_level(rootid)))
3653 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3655 return signal_pending(current);
3658 /* Sanity test specific functions */
3659 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3660 void btrfs_test_destroy_inode(struct inode *inode);
3663 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3665 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3666 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3667 &fs_info->fs_state)))