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;
681 #define BTRFS_FS_BARRIER 1
682 #define BTRFS_FS_CLOSING_START 2
683 #define BTRFS_FS_CLOSING_DONE 3
684 #define BTRFS_FS_LOG_RECOVERING 4
685 #define BTRFS_FS_OPEN 5
686 #define BTRFS_FS_QUOTA_ENABLED 6
687 #define BTRFS_FS_QUOTA_ENABLING 7
688 #define BTRFS_FS_QUOTA_DISABLING 8
689 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9
690 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10
691 #define BTRFS_FS_BTREE_ERR 11
692 #define BTRFS_FS_LOG1_ERR 12
693 #define BTRFS_FS_LOG2_ERR 13
695 struct btrfs_fs_info {
696 u8 fsid[BTRFS_FSID_SIZE];
697 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
699 struct btrfs_root *extent_root;
700 struct btrfs_root *tree_root;
701 struct btrfs_root *chunk_root;
702 struct btrfs_root *dev_root;
703 struct btrfs_root *fs_root;
704 struct btrfs_root *csum_root;
705 struct btrfs_root *quota_root;
706 struct btrfs_root *uuid_root;
707 struct btrfs_root *free_space_root;
709 /* the log root tree is a directory of all the other log roots */
710 struct btrfs_root *log_root_tree;
712 spinlock_t fs_roots_radix_lock;
713 struct radix_tree_root fs_roots_radix;
715 /* block group cache stuff */
716 spinlock_t block_group_cache_lock;
717 u64 first_logical_byte;
718 struct rb_root block_group_cache_tree;
720 /* keep track of unallocated space */
721 spinlock_t free_chunk_lock;
722 u64 free_chunk_space;
724 struct extent_io_tree freed_extents[2];
725 struct extent_io_tree *pinned_extents;
727 /* logical->physical extent mapping */
728 struct btrfs_mapping_tree mapping_tree;
731 * block reservation for extent, checksum, root tree and
732 * delayed dir index item
734 struct btrfs_block_rsv global_block_rsv;
735 /* block reservation for delay allocation */
736 struct btrfs_block_rsv delalloc_block_rsv;
737 /* block reservation for metadata operations */
738 struct btrfs_block_rsv trans_block_rsv;
739 /* block reservation for chunk tree */
740 struct btrfs_block_rsv chunk_block_rsv;
741 /* block reservation for delayed operations */
742 struct btrfs_block_rsv delayed_block_rsv;
744 struct btrfs_block_rsv empty_block_rsv;
747 u64 last_trans_committed;
748 u64 avg_delayed_ref_runtime;
751 * this is updated to the current trans every time a full commit
752 * is required instead of the faster short fsync log commits
754 u64 last_trans_log_full_commit;
755 unsigned long mount_opt;
757 * Track requests for actions that need to be done during transaction
758 * commit (like for some mount options).
760 unsigned long pending_changes;
761 unsigned long compress_type:4;
764 * It is a suggestive number, the read side is safe even it gets a
765 * wrong number because we will write out the data into a regular
766 * extent. The write side(mount/remount) is under ->s_umount lock,
767 * so it is also safe.
771 * Protected by ->chunk_mutex and sb->s_umount.
773 * The reason that we use two lock to protect it is because only
774 * remount and mount operations can change it and these two operations
775 * are under sb->s_umount, but the read side (chunk allocation) can not
776 * acquire sb->s_umount or the deadlock would happen. So we use two
777 * locks to protect it. On the write side, we must acquire two locks,
778 * and on the read side, we just need acquire one of them.
781 struct btrfs_transaction *running_transaction;
782 wait_queue_head_t transaction_throttle;
783 wait_queue_head_t transaction_wait;
784 wait_queue_head_t transaction_blocked_wait;
785 wait_queue_head_t async_submit_wait;
788 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
789 * when they are updated.
791 * Because we do not clear the flags for ever, so we needn't use
792 * the lock on the read side.
794 * We also needn't use the lock when we mount the fs, because
795 * there is no other task which will update the flag.
797 spinlock_t super_lock;
798 struct btrfs_super_block *super_copy;
799 struct btrfs_super_block *super_for_commit;
800 struct block_device *__bdev;
801 struct super_block *sb;
802 struct inode *btree_inode;
803 struct backing_dev_info bdi;
804 struct mutex tree_log_mutex;
805 struct mutex transaction_kthread_mutex;
806 struct mutex cleaner_mutex;
807 struct mutex chunk_mutex;
808 struct mutex volume_mutex;
811 * this is taken to make sure we don't set block groups ro after
812 * the free space cache has been allocated on them
814 struct mutex ro_block_group_mutex;
816 /* this is used during read/modify/write to make sure
817 * no two ios are trying to mod the same stripe at the same
820 struct btrfs_stripe_hash_table *stripe_hash_table;
823 * this protects the ordered operations list only while we are
824 * processing all of the entries on it. This way we make
825 * sure the commit code doesn't find the list temporarily empty
826 * because another function happens to be doing non-waiting preflush
827 * before jumping into the main commit.
829 struct mutex ordered_operations_mutex;
831 struct rw_semaphore commit_root_sem;
833 struct rw_semaphore cleanup_work_sem;
835 struct rw_semaphore subvol_sem;
836 struct srcu_struct subvol_srcu;
838 spinlock_t trans_lock;
840 * the reloc mutex goes with the trans lock, it is taken
841 * during commit to protect us from the relocation code
843 struct mutex reloc_mutex;
845 struct list_head trans_list;
846 struct list_head dead_roots;
847 struct list_head caching_block_groups;
849 spinlock_t delayed_iput_lock;
850 struct list_head delayed_iputs;
851 struct mutex cleaner_delayed_iput_mutex;
853 /* this protects tree_mod_seq_list */
854 spinlock_t tree_mod_seq_lock;
855 atomic64_t tree_mod_seq;
856 struct list_head tree_mod_seq_list;
858 /* this protects tree_mod_log */
859 rwlock_t tree_mod_log_lock;
860 struct rb_root tree_mod_log;
862 atomic_t nr_async_submits;
863 atomic_t async_submit_draining;
864 atomic_t nr_async_bios;
865 atomic_t async_delalloc_pages;
866 atomic_t open_ioctl_trans;
869 * this is used to protect the following list -- ordered_roots.
871 spinlock_t ordered_root_lock;
874 * all fs/file tree roots in which there are data=ordered extents
875 * pending writeback are added into this list.
877 * these can span multiple transactions and basically include
878 * every dirty data page that isn't from nodatacow
880 struct list_head ordered_roots;
882 struct mutex delalloc_root_mutex;
883 spinlock_t delalloc_root_lock;
884 /* all fs/file tree roots that have delalloc inodes. */
885 struct list_head delalloc_roots;
888 * there is a pool of worker threads for checksumming during writes
889 * and a pool for checksumming after reads. This is because readers
890 * can run with FS locks held, and the writers may be waiting for
891 * those locks. We don't want ordering in the pending list to cause
892 * deadlocks, and so the two are serviced separately.
894 * A third pool does submit_bio to avoid deadlocking with the other
897 struct btrfs_workqueue *workers;
898 struct btrfs_workqueue *delalloc_workers;
899 struct btrfs_workqueue *flush_workers;
900 struct btrfs_workqueue *endio_workers;
901 struct btrfs_workqueue *endio_meta_workers;
902 struct btrfs_workqueue *endio_raid56_workers;
903 struct btrfs_workqueue *endio_repair_workers;
904 struct btrfs_workqueue *rmw_workers;
905 struct btrfs_workqueue *endio_meta_write_workers;
906 struct btrfs_workqueue *endio_write_workers;
907 struct btrfs_workqueue *endio_freespace_worker;
908 struct btrfs_workqueue *submit_workers;
909 struct btrfs_workqueue *caching_workers;
910 struct btrfs_workqueue *readahead_workers;
913 * fixup workers take dirty pages that didn't properly go through
914 * the cow mechanism and make them safe to write. It happens
915 * for the sys_munmap function call path
917 struct btrfs_workqueue *fixup_workers;
918 struct btrfs_workqueue *delayed_workers;
920 /* the extent workers do delayed refs on the extent allocation tree */
921 struct btrfs_workqueue *extent_workers;
922 struct task_struct *transaction_kthread;
923 struct task_struct *cleaner_kthread;
924 int thread_pool_size;
926 struct kobject *space_info_kobj;
930 /* used to keep from writing metadata until there is a nice batch */
931 struct percpu_counter dirty_metadata_bytes;
932 struct percpu_counter delalloc_bytes;
933 s32 dirty_metadata_batch;
936 struct list_head dirty_cowonly_roots;
938 struct btrfs_fs_devices *fs_devices;
941 * the space_info list is almost entirely read only. It only changes
942 * when we add a new raid type to the FS, and that happens
943 * very rarely. RCU is used to protect it.
945 struct list_head space_info;
947 struct btrfs_space_info *data_sinfo;
949 struct reloc_control *reloc_ctl;
951 /* data_alloc_cluster is only used in ssd mode */
952 struct btrfs_free_cluster data_alloc_cluster;
954 /* all metadata allocations go through this cluster */
955 struct btrfs_free_cluster meta_alloc_cluster;
957 /* auto defrag inodes go here */
958 spinlock_t defrag_inodes_lock;
959 struct rb_root defrag_inodes;
960 atomic_t defrag_running;
962 /* Used to protect avail_{data, metadata, system}_alloc_bits */
963 seqlock_t profiles_lock;
965 * these three are in extended format (availability of single
966 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
967 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
969 u64 avail_data_alloc_bits;
970 u64 avail_metadata_alloc_bits;
971 u64 avail_system_alloc_bits;
973 /* restriper state */
974 spinlock_t balance_lock;
975 struct mutex balance_mutex;
976 atomic_t balance_running;
977 atomic_t balance_pause_req;
978 atomic_t balance_cancel_req;
979 struct btrfs_balance_control *balance_ctl;
980 wait_queue_head_t balance_wait_q;
982 unsigned data_chunk_allocations;
983 unsigned metadata_ratio;
987 /* private scrub information */
988 struct mutex scrub_lock;
989 atomic_t scrubs_running;
990 atomic_t scrub_pause_req;
991 atomic_t scrubs_paused;
992 atomic_t scrub_cancel_req;
993 wait_queue_head_t scrub_pause_wait;
994 int scrub_workers_refcnt;
995 struct btrfs_workqueue *scrub_workers;
996 struct btrfs_workqueue *scrub_wr_completion_workers;
997 struct btrfs_workqueue *scrub_nocow_workers;
998 struct btrfs_workqueue *scrub_parity_workers;
1000 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
1001 u32 check_integrity_print_mask;
1003 /* is qgroup tracking in a consistent state? */
1006 /* holds configuration and tracking. Protected by qgroup_lock */
1007 struct rb_root qgroup_tree;
1008 struct rb_root qgroup_op_tree;
1009 spinlock_t qgroup_lock;
1010 spinlock_t qgroup_op_lock;
1011 atomic_t qgroup_op_seq;
1014 * used to avoid frequently calling ulist_alloc()/ulist_free()
1015 * when doing qgroup accounting, it must be protected by qgroup_lock.
1017 struct ulist *qgroup_ulist;
1019 /* protect user change for quota operations */
1020 struct mutex qgroup_ioctl_lock;
1022 /* list of dirty qgroups to be written at next commit */
1023 struct list_head dirty_qgroups;
1025 /* used by qgroup for an efficient tree traversal */
1028 /* qgroup rescan items */
1029 struct mutex qgroup_rescan_lock; /* protects the progress item */
1030 struct btrfs_key qgroup_rescan_progress;
1031 struct btrfs_workqueue *qgroup_rescan_workers;
1032 struct completion qgroup_rescan_completion;
1033 struct btrfs_work qgroup_rescan_work;
1034 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1036 /* filesystem state */
1037 unsigned long fs_state;
1039 struct btrfs_delayed_root *delayed_root;
1041 /* readahead tree */
1042 spinlock_t reada_lock;
1043 struct radix_tree_root reada_tree;
1045 /* readahead works cnt */
1046 atomic_t reada_works_cnt;
1048 /* Extent buffer radix tree */
1049 spinlock_t buffer_lock;
1050 struct radix_tree_root buffer_radix;
1052 /* next backup root to be overwritten */
1053 int backup_root_index;
1055 int num_tolerated_disk_barrier_failures;
1057 /* device replace state */
1058 struct btrfs_dev_replace dev_replace;
1060 atomic_t mutually_exclusive_operation_running;
1062 struct percpu_counter bio_counter;
1063 wait_queue_head_t replace_wait;
1065 struct semaphore uuid_tree_rescan_sem;
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 /* Used to record internally whether fs has been frozen */
1088 struct btrfs_subvolume_writers {
1089 struct percpu_counter counter;
1090 wait_queue_head_t wait;
1094 * The state of btrfs root
1097 * btrfs_record_root_in_trans is a multi-step process,
1098 * and it can race with the balancing code. But the
1099 * race is very small, and only the first time the root
1100 * is added to each transaction. So IN_TRANS_SETUP
1101 * is used to tell us when more checks are required
1103 #define BTRFS_ROOT_IN_TRANS_SETUP 0
1104 #define BTRFS_ROOT_REF_COWS 1
1105 #define BTRFS_ROOT_TRACK_DIRTY 2
1106 #define BTRFS_ROOT_IN_RADIX 3
1107 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4
1108 #define BTRFS_ROOT_DEFRAG_RUNNING 5
1109 #define BTRFS_ROOT_FORCE_COW 6
1110 #define BTRFS_ROOT_MULTI_LOG_TASKS 7
1111 #define BTRFS_ROOT_DIRTY 8
1114 * in ram representation of the tree. extent_root is used for all allocations
1115 * and for the extent tree extent_root root.
1118 struct extent_buffer *node;
1120 struct extent_buffer *commit_root;
1121 struct btrfs_root *log_root;
1122 struct btrfs_root *reloc_root;
1124 unsigned long state;
1125 struct btrfs_root_item root_item;
1126 struct btrfs_key root_key;
1127 struct btrfs_fs_info *fs_info;
1128 struct extent_io_tree dirty_log_pages;
1130 struct mutex objectid_mutex;
1132 spinlock_t accounting_lock;
1133 struct btrfs_block_rsv *block_rsv;
1135 /* free ino cache stuff */
1136 struct btrfs_free_space_ctl *free_ino_ctl;
1137 enum btrfs_caching_type ino_cache_state;
1138 spinlock_t ino_cache_lock;
1139 wait_queue_head_t ino_cache_wait;
1140 struct btrfs_free_space_ctl *free_ino_pinned;
1141 u64 ino_cache_progress;
1142 struct inode *ino_cache_inode;
1144 struct mutex log_mutex;
1145 wait_queue_head_t log_writer_wait;
1146 wait_queue_head_t log_commit_wait[2];
1147 struct list_head log_ctxs[2];
1148 atomic_t log_writers;
1149 atomic_t log_commit[2];
1152 /* No matter the commit succeeds or not*/
1153 int log_transid_committed;
1154 /* Just be updated when the commit succeeds. */
1155 int last_log_commit;
1156 pid_t log_start_pid;
1161 /* data allocations are done in sectorsize units */
1164 /* node allocations are done in nodesize units */
1171 u64 highest_objectid;
1173 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1174 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1178 u64 defrag_trans_start;
1179 struct btrfs_key defrag_progress;
1180 struct btrfs_key defrag_max;
1183 /* the dirty list is only used by non-reference counted roots */
1184 struct list_head dirty_list;
1186 struct list_head root_list;
1188 spinlock_t log_extents_lock[2];
1189 struct list_head logged_list[2];
1191 spinlock_t orphan_lock;
1192 atomic_t orphan_inodes;
1193 struct btrfs_block_rsv *orphan_block_rsv;
1194 int orphan_cleanup_state;
1196 spinlock_t inode_lock;
1197 /* red-black tree that keeps track of in-memory inodes */
1198 struct rb_root inode_tree;
1201 * radix tree that keeps track of delayed nodes of every inode,
1202 * protected by inode_lock
1204 struct radix_tree_root delayed_nodes_tree;
1206 * right now this just gets used so that a root has its own devid
1207 * for stat. It may be used for more later
1211 spinlock_t root_item_lock;
1214 struct mutex delalloc_mutex;
1215 spinlock_t delalloc_lock;
1217 * all of the inodes that have delalloc bytes. It is possible for
1218 * this list to be empty even when there is still dirty data=ordered
1219 * extents waiting to finish IO.
1221 struct list_head delalloc_inodes;
1222 struct list_head delalloc_root;
1223 u64 nr_delalloc_inodes;
1225 struct mutex ordered_extent_mutex;
1227 * this is used by the balancing code to wait for all the pending
1230 spinlock_t ordered_extent_lock;
1233 * all of the data=ordered extents pending writeback
1234 * these can span multiple transactions and basically include
1235 * every dirty data page that isn't from nodatacow
1237 struct list_head ordered_extents;
1238 struct list_head ordered_root;
1239 u64 nr_ordered_extents;
1242 * Number of currently running SEND ioctls to prevent
1243 * manipulation with the read-only status via SUBVOL_SETFLAGS
1245 int send_in_progress;
1246 struct btrfs_subvolume_writers *subv_writers;
1247 atomic_t will_be_snapshoted;
1249 /* For qgroup metadata space reserve */
1250 atomic_t qgroup_meta_rsv;
1253 static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize)
1255 return blocksize - sizeof(struct btrfs_header);
1258 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_root *root)
1260 return __BTRFS_LEAF_DATA_SIZE(root->nodesize);
1263 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_root *root)
1265 return BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item);
1268 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_root *root)
1270 return BTRFS_LEAF_DATA_SIZE(root) / sizeof(struct btrfs_key_ptr);
1273 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1274 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1275 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_root *root)
1277 return BTRFS_MAX_ITEM_SIZE(root) -
1278 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1281 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_root *root)
1283 return BTRFS_MAX_ITEM_SIZE(root) - sizeof(struct btrfs_dir_item);
1287 * Flags for mount options.
1289 * Note: don't forget to add new options to btrfs_show_options()
1291 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1292 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1293 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1294 #define BTRFS_MOUNT_SSD (1 << 3)
1295 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1296 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1297 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1298 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1299 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1300 #define BTRFS_MOUNT_NOSSD (1 << 9)
1301 #define BTRFS_MOUNT_DISCARD (1 << 10)
1302 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1303 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1304 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1305 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1306 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1307 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1308 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1309 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1310 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1311 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1312 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1313 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1314 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1315 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1316 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1317 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1318 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1320 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1321 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1323 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1324 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1325 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1326 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1329 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1331 if (!btrfs_test_opt(fs_info, opt)) \
1332 btrfs_info(fs_info, fmt, ##args); \
1333 btrfs_set_opt(fs_info->mount_opt, opt); \
1336 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1338 if (btrfs_test_opt(fs_info, opt)) \
1339 btrfs_info(fs_info, fmt, ##args); \
1340 btrfs_clear_opt(fs_info->mount_opt, opt); \
1343 #ifdef CONFIG_BTRFS_DEBUG
1345 btrfs_should_fragment_free_space(struct btrfs_root *root,
1346 struct btrfs_block_group_cache *block_group)
1348 return (btrfs_test_opt(root->fs_info, FRAGMENT_METADATA) &&
1349 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1350 (btrfs_test_opt(root->fs_info, FRAGMENT_DATA) &&
1351 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1356 * Requests for changes that need to be done during transaction commit.
1358 * Internal mount options that are used for special handling of the real
1359 * mount options (eg. cannot be set during remount and have to be set during
1360 * transaction commit)
1363 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1364 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1365 #define BTRFS_PENDING_COMMIT (2)
1367 #define btrfs_test_pending(info, opt) \
1368 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1369 #define btrfs_set_pending(info, opt) \
1370 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1371 #define btrfs_clear_pending(info, opt) \
1372 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1375 * Helpers for setting pending mount option changes.
1377 * Expects corresponding macros
1378 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1380 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1382 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1383 btrfs_info((info), fmt, ##args); \
1384 btrfs_set_pending((info), SET_##opt); \
1385 btrfs_clear_pending((info), CLEAR_##opt); \
1389 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1391 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1392 btrfs_info((info), fmt, ##args); \
1393 btrfs_set_pending((info), CLEAR_##opt); \
1394 btrfs_clear_pending((info), SET_##opt); \
1401 #define BTRFS_INODE_NODATASUM (1 << 0)
1402 #define BTRFS_INODE_NODATACOW (1 << 1)
1403 #define BTRFS_INODE_READONLY (1 << 2)
1404 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1405 #define BTRFS_INODE_PREALLOC (1 << 4)
1406 #define BTRFS_INODE_SYNC (1 << 5)
1407 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1408 #define BTRFS_INODE_APPEND (1 << 7)
1409 #define BTRFS_INODE_NODUMP (1 << 8)
1410 #define BTRFS_INODE_NOATIME (1 << 9)
1411 #define BTRFS_INODE_DIRSYNC (1 << 10)
1412 #define BTRFS_INODE_COMPRESS (1 << 11)
1414 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1416 struct btrfs_map_token {
1417 struct extent_buffer *eb;
1419 unsigned long offset;
1422 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1423 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1425 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1427 token->kaddr = NULL;
1430 /* some macros to generate set/get functions for the struct fields. This
1431 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1434 #define le8_to_cpu(v) (v)
1435 #define cpu_to_le8(v) (v)
1438 #define read_eb_member(eb, ptr, type, member, result) (\
1439 read_extent_buffer(eb, (char *)(result), \
1440 ((unsigned long)(ptr)) + \
1441 offsetof(type, member), \
1442 sizeof(((type *)0)->member)))
1444 #define write_eb_member(eb, ptr, type, member, result) (\
1445 write_extent_buffer(eb, (char *)(result), \
1446 ((unsigned long)(ptr)) + \
1447 offsetof(type, member), \
1448 sizeof(((type *)0)->member)))
1450 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1451 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \
1452 unsigned long off, \
1453 struct btrfs_map_token *token); \
1454 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \
1455 unsigned long off, u##bits val, \
1456 struct btrfs_map_token *token); \
1457 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
1458 unsigned long off) \
1460 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1462 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1463 unsigned long off, u##bits val) \
1465 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1468 DECLARE_BTRFS_SETGET_BITS(8)
1469 DECLARE_BTRFS_SETGET_BITS(16)
1470 DECLARE_BTRFS_SETGET_BITS(32)
1471 DECLARE_BTRFS_SETGET_BITS(64)
1473 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1474 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \
1476 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1477 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1479 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1482 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1483 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1485 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
1486 struct btrfs_map_token *token) \
1488 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1489 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1491 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1492 type *s, u##bits val, \
1493 struct btrfs_map_token *token) \
1495 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1496 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1499 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1500 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1502 type *p = page_address(eb->pages[0]); \
1503 u##bits res = le##bits##_to_cpu(p->member); \
1506 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1509 type *p = page_address(eb->pages[0]); \
1510 p->member = cpu_to_le##bits(val); \
1513 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1514 static inline u##bits btrfs_##name(type *s) \
1516 return le##bits##_to_cpu(s->member); \
1518 static inline void btrfs_set_##name(type *s, u##bits val) \
1520 s->member = cpu_to_le##bits(val); \
1523 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1524 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1525 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1526 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1527 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1528 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1530 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1531 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1532 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1533 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1534 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1535 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1537 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1538 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1540 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1542 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1544 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1546 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1548 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1549 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1551 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1553 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1555 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1558 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1560 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1563 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1565 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1568 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1569 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1570 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1571 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1572 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1573 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1574 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1575 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1576 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1577 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1578 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1580 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1582 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1585 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1586 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1587 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1589 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1591 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1593 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1595 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1596 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1598 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1600 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1601 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1603 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1606 unsigned long offset = (unsigned long)c;
1607 offset += offsetof(struct btrfs_chunk, stripe);
1608 offset += nr * sizeof(struct btrfs_stripe);
1609 return (struct btrfs_stripe *)offset;
1612 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1614 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1617 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1618 struct btrfs_chunk *c, int nr)
1620 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1623 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1624 struct btrfs_chunk *c, int nr)
1626 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1629 /* struct btrfs_block_group_item */
1630 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1632 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1634 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1635 struct btrfs_block_group_item, chunk_objectid, 64);
1637 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1638 struct btrfs_block_group_item, chunk_objectid, 64);
1639 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1640 struct btrfs_block_group_item, flags, 64);
1641 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1642 struct btrfs_block_group_item, flags, 64);
1644 /* struct btrfs_free_space_info */
1645 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1647 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1649 /* struct btrfs_inode_ref */
1650 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1651 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1653 /* struct btrfs_inode_extref */
1654 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1655 parent_objectid, 64);
1656 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1658 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1660 /* struct btrfs_inode_item */
1661 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1662 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1663 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1664 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1665 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1666 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1667 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1668 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1669 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1670 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1671 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1672 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1673 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1675 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1677 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1679 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1680 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1682 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1684 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1685 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1686 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1687 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1688 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1689 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1690 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1691 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1692 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1693 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1695 /* struct btrfs_dev_extent */
1696 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1698 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1699 chunk_objectid, 64);
1700 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1702 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1704 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1706 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1707 return (unsigned long)dev + ptr;
1710 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1711 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1713 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1715 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1718 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1720 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1721 struct btrfs_tree_block_info *item,
1722 struct btrfs_disk_key *key)
1724 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1727 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1728 struct btrfs_tree_block_info *item,
1729 struct btrfs_disk_key *key)
1731 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1734 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1736 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1738 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1740 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1743 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1746 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1748 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1751 static inline u32 btrfs_extent_inline_ref_size(int type)
1753 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1754 type == BTRFS_SHARED_BLOCK_REF_KEY)
1755 return sizeof(struct btrfs_extent_inline_ref);
1756 if (type == BTRFS_SHARED_DATA_REF_KEY)
1757 return sizeof(struct btrfs_shared_data_ref) +
1758 sizeof(struct btrfs_extent_inline_ref);
1759 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1760 return sizeof(struct btrfs_extent_data_ref) +
1761 offsetof(struct btrfs_extent_inline_ref, offset);
1766 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1767 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1769 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1770 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1772 /* struct btrfs_node */
1773 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1774 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1775 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1777 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1780 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1783 ptr = offsetof(struct btrfs_node, ptrs) +
1784 sizeof(struct btrfs_key_ptr) * nr;
1785 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1788 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1792 ptr = offsetof(struct btrfs_node, ptrs) +
1793 sizeof(struct btrfs_key_ptr) * nr;
1794 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1797 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1800 ptr = offsetof(struct btrfs_node, ptrs) +
1801 sizeof(struct btrfs_key_ptr) * nr;
1802 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1805 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1809 ptr = offsetof(struct btrfs_node, ptrs) +
1810 sizeof(struct btrfs_key_ptr) * nr;
1811 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1814 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1816 return offsetof(struct btrfs_node, ptrs) +
1817 sizeof(struct btrfs_key_ptr) * nr;
1820 void btrfs_node_key(struct extent_buffer *eb,
1821 struct btrfs_disk_key *disk_key, int nr);
1823 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1824 struct btrfs_disk_key *disk_key, int nr)
1827 ptr = btrfs_node_key_ptr_offset(nr);
1828 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1829 struct btrfs_key_ptr, key, disk_key);
1832 /* struct btrfs_item */
1833 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1834 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1835 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1836 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1838 static inline unsigned long btrfs_item_nr_offset(int nr)
1840 return offsetof(struct btrfs_leaf, items) +
1841 sizeof(struct btrfs_item) * nr;
1844 static inline struct btrfs_item *btrfs_item_nr(int nr)
1846 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1849 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1850 struct btrfs_item *item)
1852 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1855 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1857 return btrfs_item_end(eb, btrfs_item_nr(nr));
1860 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1862 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1865 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1867 return btrfs_item_size(eb, btrfs_item_nr(nr));
1870 static inline void btrfs_item_key(struct extent_buffer *eb,
1871 struct btrfs_disk_key *disk_key, int nr)
1873 struct btrfs_item *item = btrfs_item_nr(nr);
1874 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1877 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1878 struct btrfs_disk_key *disk_key, int nr)
1880 struct btrfs_item *item = btrfs_item_nr(nr);
1881 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1884 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1887 * struct btrfs_root_ref
1889 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1890 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1891 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1893 /* struct btrfs_dir_item */
1894 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1895 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1896 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1897 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1898 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1899 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1901 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1903 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1906 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1907 struct btrfs_dir_item *item,
1908 struct btrfs_disk_key *key)
1910 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1913 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1914 struct btrfs_dir_item *item,
1915 struct btrfs_disk_key *key)
1917 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1920 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1922 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1924 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1927 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1928 struct btrfs_free_space_header *h,
1929 struct btrfs_disk_key *key)
1931 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1934 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1935 struct btrfs_free_space_header *h,
1936 struct btrfs_disk_key *key)
1938 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1941 /* struct btrfs_disk_key */
1942 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1944 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1945 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1947 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1948 struct btrfs_disk_key *disk)
1950 cpu->offset = le64_to_cpu(disk->offset);
1951 cpu->type = disk->type;
1952 cpu->objectid = le64_to_cpu(disk->objectid);
1955 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1956 struct btrfs_key *cpu)
1958 disk->offset = cpu_to_le64(cpu->offset);
1959 disk->type = cpu->type;
1960 disk->objectid = cpu_to_le64(cpu->objectid);
1963 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1964 struct btrfs_key *key, int nr)
1966 struct btrfs_disk_key disk_key;
1967 btrfs_node_key(eb, &disk_key, nr);
1968 btrfs_disk_key_to_cpu(key, &disk_key);
1971 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1972 struct btrfs_key *key, int nr)
1974 struct btrfs_disk_key disk_key;
1975 btrfs_item_key(eb, &disk_key, nr);
1976 btrfs_disk_key_to_cpu(key, &disk_key);
1979 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1980 struct btrfs_dir_item *item,
1981 struct btrfs_key *key)
1983 struct btrfs_disk_key disk_key;
1984 btrfs_dir_item_key(eb, item, &disk_key);
1985 btrfs_disk_key_to_cpu(key, &disk_key);
1989 static inline u8 btrfs_key_type(struct btrfs_key *key)
1994 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1999 /* struct btrfs_header */
2000 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2001 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2003 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2004 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2005 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2006 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2007 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2009 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2010 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2012 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2014 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2016 return (btrfs_header_flags(eb) & flag) == flag;
2019 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2021 u64 flags = btrfs_header_flags(eb);
2022 btrfs_set_header_flags(eb, flags | flag);
2023 return (flags & flag) == flag;
2026 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2028 u64 flags = btrfs_header_flags(eb);
2029 btrfs_set_header_flags(eb, flags & ~flag);
2030 return (flags & flag) == flag;
2033 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2035 u64 flags = btrfs_header_flags(eb);
2036 return flags >> BTRFS_BACKREF_REV_SHIFT;
2039 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2042 u64 flags = btrfs_header_flags(eb);
2043 flags &= ~BTRFS_BACKREF_REV_MASK;
2044 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2045 btrfs_set_header_flags(eb, flags);
2048 static inline unsigned long btrfs_header_fsid(void)
2050 return offsetof(struct btrfs_header, fsid);
2053 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2055 return offsetof(struct btrfs_header, chunk_tree_uuid);
2058 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2060 return btrfs_header_level(eb) == 0;
2063 /* struct btrfs_root_item */
2064 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2066 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2067 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2068 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2070 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2072 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2073 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2074 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2075 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2076 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2077 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2078 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2079 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2081 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2083 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2085 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2087 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2089 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2092 static inline bool btrfs_root_readonly(struct btrfs_root *root)
2094 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2097 static inline bool btrfs_root_dead(struct btrfs_root *root)
2099 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2102 /* struct btrfs_root_backup */
2103 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2105 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2107 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2108 tree_root_level, 8);
2110 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2112 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2113 chunk_root_gen, 64);
2114 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2115 chunk_root_level, 8);
2117 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2119 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2120 extent_root_gen, 64);
2121 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2122 extent_root_level, 8);
2124 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2126 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2128 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2131 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2133 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2135 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2138 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2140 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2142 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2143 csum_root_level, 8);
2144 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2146 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2148 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2151 /* struct btrfs_balance_item */
2152 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2154 static inline void btrfs_balance_data(struct extent_buffer *eb,
2155 struct btrfs_balance_item *bi,
2156 struct btrfs_disk_balance_args *ba)
2158 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2161 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2162 struct btrfs_balance_item *bi,
2163 struct btrfs_disk_balance_args *ba)
2165 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2168 static inline void btrfs_balance_meta(struct extent_buffer *eb,
2169 struct btrfs_balance_item *bi,
2170 struct btrfs_disk_balance_args *ba)
2172 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2175 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2176 struct btrfs_balance_item *bi,
2177 struct btrfs_disk_balance_args *ba)
2179 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2182 static inline void btrfs_balance_sys(struct extent_buffer *eb,
2183 struct btrfs_balance_item *bi,
2184 struct btrfs_disk_balance_args *ba)
2186 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2189 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2190 struct btrfs_balance_item *bi,
2191 struct btrfs_disk_balance_args *ba)
2193 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2197 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2198 struct btrfs_disk_balance_args *disk)
2200 memset(cpu, 0, sizeof(*cpu));
2202 cpu->profiles = le64_to_cpu(disk->profiles);
2203 cpu->usage = le64_to_cpu(disk->usage);
2204 cpu->devid = le64_to_cpu(disk->devid);
2205 cpu->pstart = le64_to_cpu(disk->pstart);
2206 cpu->pend = le64_to_cpu(disk->pend);
2207 cpu->vstart = le64_to_cpu(disk->vstart);
2208 cpu->vend = le64_to_cpu(disk->vend);
2209 cpu->target = le64_to_cpu(disk->target);
2210 cpu->flags = le64_to_cpu(disk->flags);
2211 cpu->limit = le64_to_cpu(disk->limit);
2215 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2216 struct btrfs_balance_args *cpu)
2218 memset(disk, 0, sizeof(*disk));
2220 disk->profiles = cpu_to_le64(cpu->profiles);
2221 disk->usage = cpu_to_le64(cpu->usage);
2222 disk->devid = cpu_to_le64(cpu->devid);
2223 disk->pstart = cpu_to_le64(cpu->pstart);
2224 disk->pend = cpu_to_le64(cpu->pend);
2225 disk->vstart = cpu_to_le64(cpu->vstart);
2226 disk->vend = cpu_to_le64(cpu->vend);
2227 disk->target = cpu_to_le64(cpu->target);
2228 disk->flags = cpu_to_le64(cpu->flags);
2229 disk->limit = cpu_to_le64(cpu->limit);
2232 /* struct btrfs_super_block */
2233 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2234 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2235 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2237 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2238 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2239 struct btrfs_super_block, sys_chunk_array_size, 32);
2240 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2241 struct btrfs_super_block, chunk_root_generation, 64);
2242 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2244 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2246 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2247 chunk_root_level, 8);
2248 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2250 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2251 log_root_transid, 64);
2252 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2254 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2256 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2258 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2260 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2262 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2264 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2265 root_dir_objectid, 64);
2266 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2268 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2270 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2271 compat_ro_flags, 64);
2272 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2273 incompat_flags, 64);
2274 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2276 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2277 cache_generation, 64);
2278 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2279 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2280 uuid_tree_generation, 64);
2282 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2284 u16 t = btrfs_super_csum_type(s);
2286 * csum type is validated at mount time
2288 return btrfs_csum_sizes[t];
2291 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2293 return offsetof(struct btrfs_leaf, items);
2297 * The leaf data grows from end-to-front in the node.
2298 * this returns the address of the start of the last item,
2299 * which is the stop of the leaf data stack
2301 static inline unsigned int leaf_data_end(struct btrfs_root *root,
2302 struct extent_buffer *leaf)
2304 u32 nr = btrfs_header_nritems(leaf);
2307 return BTRFS_LEAF_DATA_SIZE(root);
2308 return btrfs_item_offset_nr(leaf, nr - 1);
2311 /* struct btrfs_file_extent_item */
2312 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2313 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2314 struct btrfs_file_extent_item, disk_bytenr, 64);
2315 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2316 struct btrfs_file_extent_item, offset, 64);
2317 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2318 struct btrfs_file_extent_item, generation, 64);
2319 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2320 struct btrfs_file_extent_item, num_bytes, 64);
2321 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2322 struct btrfs_file_extent_item, disk_num_bytes, 64);
2323 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2324 struct btrfs_file_extent_item, compression, 8);
2326 static inline unsigned long
2327 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2329 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2332 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2334 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2337 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2339 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2341 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2342 disk_num_bytes, 64);
2343 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2345 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2347 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2349 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2351 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2353 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2354 other_encoding, 16);
2357 * this returns the number of bytes used by the item on disk, minus the
2358 * size of any extent headers. If a file is compressed on disk, this is
2359 * the compressed size
2361 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2362 struct btrfs_item *e)
2364 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2367 /* this returns the number of file bytes represented by the inline item.
2368 * If an item is compressed, this is the uncompressed size
2370 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2372 struct btrfs_file_extent_item *fi)
2374 struct btrfs_map_token token;
2376 btrfs_init_map_token(&token);
2378 * return the space used on disk if this item isn't
2379 * compressed or encoded
2381 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
2382 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
2383 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
2384 return btrfs_file_extent_inline_item_len(eb,
2385 btrfs_item_nr(slot));
2388 /* otherwise use the ram bytes field */
2389 return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
2393 /* btrfs_dev_stats_item */
2394 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
2395 struct btrfs_dev_stats_item *ptr,
2400 read_extent_buffer(eb, &val,
2401 offsetof(struct btrfs_dev_stats_item, values) +
2402 ((unsigned long)ptr) + (index * sizeof(u64)),
2407 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2408 struct btrfs_dev_stats_item *ptr,
2411 write_extent_buffer(eb, &val,
2412 offsetof(struct btrfs_dev_stats_item, values) +
2413 ((unsigned long)ptr) + (index * sizeof(u64)),
2417 /* btrfs_qgroup_status_item */
2418 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2420 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2422 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2424 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2427 /* btrfs_qgroup_info_item */
2428 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2430 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2431 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2433 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2434 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2437 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2438 struct btrfs_qgroup_info_item, generation, 64);
2439 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2441 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2442 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2443 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2445 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2446 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2448 /* btrfs_qgroup_limit_item */
2449 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2451 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2453 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2455 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2457 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2460 /* btrfs_dev_replace_item */
2461 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2462 struct btrfs_dev_replace_item, src_devid, 64);
2463 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2464 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2466 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2468 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2470 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2472 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2473 num_write_errors, 64);
2474 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2475 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2477 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2479 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2482 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2483 struct btrfs_dev_replace_item, src_devid, 64);
2484 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2485 struct btrfs_dev_replace_item,
2486 cont_reading_from_srcdev_mode, 64);
2487 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2488 struct btrfs_dev_replace_item, replace_state, 64);
2489 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2490 struct btrfs_dev_replace_item, time_started, 64);
2491 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2492 struct btrfs_dev_replace_item, time_stopped, 64);
2493 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2494 struct btrfs_dev_replace_item, num_write_errors, 64);
2495 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2496 struct btrfs_dev_replace_item,
2497 num_uncorrectable_read_errors, 64);
2498 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2499 struct btrfs_dev_replace_item, cursor_left, 64);
2500 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2501 struct btrfs_dev_replace_item, cursor_right, 64);
2503 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
2505 return sb->s_fs_info;
2508 /* helper function to cast into the data area of the leaf. */
2509 #define btrfs_item_ptr(leaf, slot, type) \
2510 ((type *)(btrfs_leaf_data(leaf) + \
2511 btrfs_item_offset_nr(leaf, slot)))
2513 #define btrfs_item_ptr_offset(leaf, slot) \
2514 ((unsigned long)(btrfs_leaf_data(leaf) + \
2515 btrfs_item_offset_nr(leaf, slot)))
2517 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
2519 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
2520 (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
2523 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2525 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2530 u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
2532 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2535 return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2539 * Doing a truncate won't result in new nodes or leaves, just what we need for
2542 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
2545 return root->nodesize * BTRFS_MAX_LEVEL * num_items;
2548 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
2549 struct btrfs_root *root);
2550 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
2551 struct btrfs_root *root);
2552 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2554 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2555 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2556 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2557 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2558 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2559 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2560 struct btrfs_root *root, unsigned long count);
2561 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
2562 unsigned long count, u64 transid, int wait);
2563 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
2564 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2565 struct btrfs_root *root, u64 bytenr,
2566 u64 offset, int metadata, u64 *refs, u64 *flags);
2567 int btrfs_pin_extent(struct btrfs_root *root,
2568 u64 bytenr, u64 num, int reserved);
2569 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
2570 u64 bytenr, u64 num_bytes);
2571 int btrfs_exclude_logged_extents(struct btrfs_root *root,
2572 struct extent_buffer *eb);
2573 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2574 struct btrfs_root *root,
2575 u64 objectid, u64 offset, u64 bytenr);
2576 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2577 struct btrfs_fs_info *info,
2579 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2580 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2581 int get_block_group_index(struct btrfs_block_group_cache *cache);
2582 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2583 struct btrfs_root *root, u64 parent,
2585 struct btrfs_disk_key *key, int level,
2586 u64 hint, u64 empty_size);
2587 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2588 struct btrfs_root *root,
2589 struct extent_buffer *buf,
2590 u64 parent, int last_ref);
2591 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2592 struct btrfs_root *root,
2593 u64 root_objectid, u64 owner,
2594 u64 offset, u64 ram_bytes,
2595 struct btrfs_key *ins);
2596 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root,
2598 u64 root_objectid, u64 owner, u64 offset,
2599 struct btrfs_key *ins);
2600 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2601 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2602 struct btrfs_key *ins, int is_data, int delalloc);
2603 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2604 struct extent_buffer *buf, int full_backref);
2605 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2606 struct extent_buffer *buf, int full_backref);
2607 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2608 struct btrfs_root *root,
2609 u64 bytenr, u64 num_bytes, u64 flags,
2610 int level, int is_data);
2611 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2612 struct btrfs_root *root,
2613 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
2614 u64 owner, u64 offset);
2616 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
2618 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
2619 u64 start, u64 len);
2620 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
2621 struct btrfs_root *root);
2622 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2623 struct btrfs_root *root);
2624 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2625 struct btrfs_root *root,
2626 u64 bytenr, u64 num_bytes, u64 parent,
2627 u64 root_objectid, u64 owner, u64 offset);
2629 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
2630 struct btrfs_root *root);
2631 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2632 struct btrfs_root *root);
2633 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
2634 struct btrfs_root *root);
2635 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
2636 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2637 int btrfs_read_block_groups(struct btrfs_root *root);
2638 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2639 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2640 struct btrfs_root *root, u64 bytes_used,
2641 u64 type, u64 chunk_objectid, u64 chunk_offset,
2643 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2644 struct btrfs_fs_info *fs_info,
2645 const u64 chunk_offset);
2646 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2647 struct btrfs_root *root, u64 group_start,
2648 struct extent_map *em);
2649 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2650 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2651 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2652 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
2653 struct btrfs_root *root);
2654 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
2655 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2657 enum btrfs_reserve_flush_enum {
2658 /* If we are in the transaction, we can't flush anything.*/
2659 BTRFS_RESERVE_NO_FLUSH,
2661 * Flushing delalloc may cause deadlock somewhere, in this
2662 * case, use FLUSH LIMIT
2664 BTRFS_RESERVE_FLUSH_LIMIT,
2665 BTRFS_RESERVE_FLUSH_ALL,
2668 enum btrfs_flush_state {
2669 FLUSH_DELAYED_ITEMS_NR = 1,
2670 FLUSH_DELAYED_ITEMS = 2,
2672 FLUSH_DELALLOC_WAIT = 4,
2677 int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
2678 int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
2679 void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
2680 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
2682 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
2683 struct btrfs_root *root);
2684 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
2685 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
2686 struct inode *inode);
2687 void btrfs_orphan_release_metadata(struct inode *inode);
2688 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2689 struct btrfs_block_rsv *rsv,
2691 u64 *qgroup_reserved, bool use_global_rsv);
2692 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2693 struct btrfs_block_rsv *rsv,
2694 u64 qgroup_reserved);
2695 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
2696 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
2697 int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
2698 void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
2699 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
2700 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
2701 unsigned short type);
2702 void btrfs_free_block_rsv(struct btrfs_root *root,
2703 struct btrfs_block_rsv *rsv);
2704 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
2705 int btrfs_block_rsv_add(struct btrfs_root *root,
2706 struct btrfs_block_rsv *block_rsv, u64 num_bytes,
2707 enum btrfs_reserve_flush_enum flush);
2708 int btrfs_block_rsv_check(struct btrfs_root *root,
2709 struct btrfs_block_rsv *block_rsv, int min_factor);
2710 int btrfs_block_rsv_refill(struct btrfs_root *root,
2711 struct btrfs_block_rsv *block_rsv, u64 min_reserved,
2712 enum btrfs_reserve_flush_enum flush);
2713 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
2714 struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
2716 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
2717 struct btrfs_block_rsv *dest, u64 num_bytes,
2719 void btrfs_block_rsv_release(struct btrfs_root *root,
2720 struct btrfs_block_rsv *block_rsv,
2722 int btrfs_inc_block_group_ro(struct btrfs_root *root,
2723 struct btrfs_block_group_cache *cache);
2724 void btrfs_dec_block_group_ro(struct btrfs_root *root,
2725 struct btrfs_block_group_cache *cache);
2726 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2727 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2728 int btrfs_error_unpin_extent_range(struct btrfs_root *root,
2729 u64 start, u64 end);
2730 int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
2731 u64 num_bytes, u64 *actual_bytes);
2732 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
2733 struct btrfs_root *root, u64 type);
2734 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
2736 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2737 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2738 struct btrfs_fs_info *fs_info);
2739 int __get_raid_index(u64 flags);
2740 int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
2741 void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
2742 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2743 void check_system_chunk(struct btrfs_trans_handle *trans,
2744 struct btrfs_root *root,
2746 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2747 struct btrfs_fs_info *info, u64 start, u64 end);
2750 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
2751 int level, int *slot);
2752 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2753 int btrfs_previous_item(struct btrfs_root *root,
2754 struct btrfs_path *path, u64 min_objectid,
2756 int btrfs_previous_extent_item(struct btrfs_root *root,
2757 struct btrfs_path *path, u64 min_objectid);
2758 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2759 struct btrfs_path *path,
2760 struct btrfs_key *new_key);
2761 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2762 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2763 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2764 struct btrfs_key *key, int lowest_level,
2766 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2767 struct btrfs_path *path,
2769 enum btrfs_compare_tree_result {
2770 BTRFS_COMPARE_TREE_NEW,
2771 BTRFS_COMPARE_TREE_DELETED,
2772 BTRFS_COMPARE_TREE_CHANGED,
2773 BTRFS_COMPARE_TREE_SAME,
2775 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
2776 struct btrfs_root *right_root,
2777 struct btrfs_path *left_path,
2778 struct btrfs_path *right_path,
2779 struct btrfs_key *key,
2780 enum btrfs_compare_tree_result result,
2782 int btrfs_compare_trees(struct btrfs_root *left_root,
2783 struct btrfs_root *right_root,
2784 btrfs_changed_cb_t cb, void *ctx);
2785 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2786 struct btrfs_root *root, struct extent_buffer *buf,
2787 struct extent_buffer *parent, int parent_slot,
2788 struct extent_buffer **cow_ret);
2789 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2790 struct btrfs_root *root,
2791 struct extent_buffer *buf,
2792 struct extent_buffer **cow_ret, u64 new_root_objectid);
2793 int btrfs_block_can_be_shared(struct btrfs_root *root,
2794 struct extent_buffer *buf);
2795 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2797 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2798 u32 new_size, int from_end);
2799 int btrfs_split_item(struct btrfs_trans_handle *trans,
2800 struct btrfs_root *root,
2801 struct btrfs_path *path,
2802 struct btrfs_key *new_key,
2803 unsigned long split_offset);
2804 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2805 struct btrfs_root *root,
2806 struct btrfs_path *path,
2807 struct btrfs_key *new_key);
2808 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2809 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2810 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2811 *root, struct btrfs_key *key, struct btrfs_path *p, int
2813 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
2814 struct btrfs_path *p, u64 time_seq);
2815 int btrfs_search_slot_for_read(struct btrfs_root *root,
2816 struct btrfs_key *key, struct btrfs_path *p,
2817 int find_higher, int return_any);
2818 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2819 struct btrfs_root *root, struct extent_buffer *parent,
2820 int start_slot, u64 *last_ret,
2821 struct btrfs_key *progress);
2822 void btrfs_release_path(struct btrfs_path *p);
2823 struct btrfs_path *btrfs_alloc_path(void);
2824 void btrfs_free_path(struct btrfs_path *p);
2825 void btrfs_set_path_blocking(struct btrfs_path *p);
2826 void btrfs_clear_path_blocking(struct btrfs_path *p,
2827 struct extent_buffer *held, int held_rw);
2828 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2830 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2831 struct btrfs_path *path, int slot, int nr);
2832 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2833 struct btrfs_root *root,
2834 struct btrfs_path *path)
2836 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2839 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2840 struct btrfs_key *cpu_key, u32 *data_size,
2841 u32 total_data, u32 total_size, int nr);
2842 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2843 *root, struct btrfs_key *key, void *data, u32 data_size);
2844 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2845 struct btrfs_root *root,
2846 struct btrfs_path *path,
2847 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2849 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2850 struct btrfs_root *root,
2851 struct btrfs_path *path,
2852 struct btrfs_key *key,
2855 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2858 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2859 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2860 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2862 static inline int btrfs_next_old_item(struct btrfs_root *root,
2863 struct btrfs_path *p, u64 time_seq)
2866 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2867 return btrfs_next_old_leaf(root, p, time_seq);
2870 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2872 return btrfs_next_old_item(root, p, 0);
2874 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2875 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2876 struct btrfs_block_rsv *block_rsv,
2877 int update_ref, int for_reloc);
2878 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2879 struct btrfs_root *root,
2880 struct extent_buffer *node,
2881 struct extent_buffer *parent);
2882 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2885 * Do it this way so we only ever do one test_bit in the normal case.
2887 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2888 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2896 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2897 * anything except sleeping. This function is used to check the status of
2900 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
2902 return (root->fs_info->sb->s_flags & MS_RDONLY ||
2903 btrfs_fs_closing(root->fs_info));
2906 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2908 kfree(fs_info->balance_ctl);
2909 kfree(fs_info->delayed_root);
2910 kfree(fs_info->extent_root);
2911 kfree(fs_info->tree_root);
2912 kfree(fs_info->chunk_root);
2913 kfree(fs_info->dev_root);
2914 kfree(fs_info->csum_root);
2915 kfree(fs_info->quota_root);
2916 kfree(fs_info->uuid_root);
2917 kfree(fs_info->free_space_root);
2918 kfree(fs_info->super_copy);
2919 kfree(fs_info->super_for_commit);
2920 security_free_mnt_opts(&fs_info->security_opts);
2924 /* tree mod log functions from ctree.c */
2925 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2926 struct seq_list *elem);
2927 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2928 struct seq_list *elem);
2929 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2932 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2933 struct btrfs_root *tree_root,
2934 u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
2935 const char *name, int name_len);
2936 int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
2937 struct btrfs_root *tree_root,
2938 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2939 const char *name, int name_len);
2940 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2941 struct btrfs_key *key);
2942 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2943 *root, struct btrfs_key *key, struct btrfs_root_item
2945 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2946 struct btrfs_root *root,
2947 struct btrfs_key *key,
2948 struct btrfs_root_item *item);
2949 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
2950 struct btrfs_path *path, struct btrfs_root_item *root_item,
2951 struct btrfs_key *root_key);
2952 int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2953 void btrfs_set_root_node(struct btrfs_root_item *item,
2954 struct extent_buffer *node);
2955 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2956 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2957 struct btrfs_root *root);
2960 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
2961 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
2963 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
2964 struct btrfs_root *uuid_root, u8 *uuid, u8 type,
2966 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2967 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2971 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2972 const char *name, int name_len);
2973 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
2974 struct btrfs_root *root, const char *name,
2975 int name_len, struct inode *dir,
2976 struct btrfs_key *location, u8 type, u64 index);
2977 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2978 struct btrfs_root *root,
2979 struct btrfs_path *path, u64 dir,
2980 const char *name, int name_len,
2982 struct btrfs_dir_item *
2983 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2984 struct btrfs_root *root,
2985 struct btrfs_path *path, u64 dir,
2986 u64 objectid, const char *name, int name_len,
2988 struct btrfs_dir_item *
2989 btrfs_search_dir_index_item(struct btrfs_root *root,
2990 struct btrfs_path *path, u64 dirid,
2991 const char *name, int name_len);
2992 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2993 struct btrfs_root *root,
2994 struct btrfs_path *path,
2995 struct btrfs_dir_item *di);
2996 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2997 struct btrfs_root *root,
2998 struct btrfs_path *path, u64 objectid,
2999 const char *name, u16 name_len,
3000 const void *data, u16 data_len);
3001 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3002 struct btrfs_root *root,
3003 struct btrfs_path *path, u64 dir,
3004 const char *name, u16 name_len,
3006 int verify_dir_item(struct btrfs_root *root,
3007 struct extent_buffer *leaf,
3008 struct btrfs_dir_item *dir_item);
3009 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
3010 struct btrfs_path *path,
3015 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3016 struct btrfs_root *root, u64 offset);
3017 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3018 struct btrfs_root *root, u64 offset);
3019 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3022 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3023 struct btrfs_root *root,
3024 const char *name, int name_len,
3025 u64 inode_objectid, u64 ref_objectid, u64 index);
3026 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3027 struct btrfs_root *root,
3028 const char *name, int name_len,
3029 u64 inode_objectid, u64 ref_objectid, u64 *index);
3030 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3031 struct btrfs_root *root,
3032 struct btrfs_path *path, u64 objectid);
3033 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3034 *root, struct btrfs_path *path,
3035 struct btrfs_key *location, int mod);
3037 struct btrfs_inode_extref *
3038 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3039 struct btrfs_root *root,
3040 struct btrfs_path *path,
3041 const char *name, int name_len,
3042 u64 inode_objectid, u64 ref_objectid, int ins_len,
3045 int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
3046 u64 ref_objectid, const char *name,
3048 struct btrfs_inode_extref **extref_ret);
3051 struct btrfs_dio_private;
3052 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3053 struct btrfs_root *root, u64 bytenr, u64 len);
3054 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3055 struct bio *bio, u32 *dst);
3056 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3057 struct bio *bio, u64 logical_offset);
3058 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3059 struct btrfs_root *root,
3060 u64 objectid, u64 pos,
3061 u64 disk_offset, u64 disk_num_bytes,
3062 u64 num_bytes, u64 offset, u64 ram_bytes,
3063 u8 compression, u8 encryption, u16 other_encoding);
3064 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3065 struct btrfs_root *root,
3066 struct btrfs_path *path, u64 objectid,
3067 u64 bytenr, int mod);
3068 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3069 struct btrfs_root *root,
3070 struct btrfs_ordered_sum *sums);
3071 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3072 struct bio *bio, u64 file_start, int contig);
3073 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3074 struct list_head *list, int search_commit);
3075 void btrfs_extent_item_to_extent_map(struct inode *inode,
3076 const struct btrfs_path *path,
3077 struct btrfs_file_extent_item *fi,
3078 const bool new_inline,
3079 struct extent_map *em);
3082 struct btrfs_delalloc_work {
3083 struct inode *inode;
3085 struct completion completion;
3086 struct list_head list;
3087 struct btrfs_work work;
3090 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
3092 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
3094 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
3095 size_t pg_offset, u64 start, u64 len,
3097 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3098 u64 *orig_start, u64 *orig_block_len,
3101 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3102 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3103 #define ClearPageChecked ClearPageFsMisc
3104 #define SetPageChecked SetPageFsMisc
3105 #define PageChecked PageFsMisc
3108 /* This forces readahead on a given range of bytes in an inode */
3109 static inline void btrfs_force_ra(struct address_space *mapping,
3110 struct file_ra_state *ra, struct file *file,
3111 pgoff_t offset, unsigned long req_size)
3113 page_cache_sync_readahead(mapping, ra, file, offset, req_size);
3116 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3117 int btrfs_set_inode_index(struct inode *dir, u64 *index);
3118 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3119 struct btrfs_root *root,
3120 struct inode *dir, struct inode *inode,
3121 const char *name, int name_len);
3122 int btrfs_add_link(struct btrfs_trans_handle *trans,
3123 struct inode *parent_inode, struct inode *inode,
3124 const char *name, int name_len, int add_backref, u64 index);
3125 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
3126 struct btrfs_root *root,
3127 struct inode *dir, u64 objectid,
3128 const char *name, int name_len);
3129 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3131 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3132 struct btrfs_root *root,
3133 struct inode *inode, u64 new_size,
3136 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3137 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
3139 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3140 struct extent_state **cached_state, int dedupe);
3141 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3142 struct btrfs_root *new_root,
3143 struct btrfs_root *parent_root,
3145 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
3146 size_t size, struct bio *bio,
3147 unsigned long bio_flags);
3148 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
3149 int btrfs_readpage(struct file *file, struct page *page);
3150 void btrfs_evict_inode(struct inode *inode);
3151 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3152 struct inode *btrfs_alloc_inode(struct super_block *sb);
3153 void btrfs_destroy_inode(struct inode *inode);
3154 int btrfs_drop_inode(struct inode *inode);
3155 int btrfs_init_cachep(void);
3156 void btrfs_destroy_cachep(void);
3157 long btrfs_ioctl_trans_end(struct file *file);
3158 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3159 struct btrfs_root *root, int *was_new);
3160 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3161 size_t pg_offset, u64 start, u64 end,
3163 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3164 struct btrfs_root *root,
3165 struct inode *inode);
3166 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3167 struct btrfs_root *root, struct inode *inode);
3168 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3169 int btrfs_orphan_cleanup(struct btrfs_root *root);
3170 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
3171 struct btrfs_root *root);
3172 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3173 void btrfs_invalidate_inodes(struct btrfs_root *root);
3174 void btrfs_add_delayed_iput(struct inode *inode);
3175 void btrfs_run_delayed_iputs(struct btrfs_root *root);
3176 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3177 u64 start, u64 num_bytes, u64 min_size,
3178 loff_t actual_len, u64 *alloc_hint);
3179 int btrfs_prealloc_file_range_trans(struct inode *inode,
3180 struct btrfs_trans_handle *trans, int mode,
3181 u64 start, u64 num_bytes, u64 min_size,
3182 loff_t actual_len, u64 *alloc_hint);
3183 extern const struct dentry_operations btrfs_dentry_operations;
3184 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3185 void btrfs_test_inode_set_ops(struct inode *inode);
3189 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3190 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3191 int btrfs_ioctl_get_supported_features(void __user *arg);
3192 void btrfs_update_iflags(struct inode *inode);
3193 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3194 int btrfs_is_empty_uuid(u8 *uuid);
3195 int btrfs_defrag_file(struct inode *inode, struct file *file,
3196 struct btrfs_ioctl_defrag_range_args *range,
3197 u64 newer_than, unsigned long max_pages);
3198 void btrfs_get_block_group_info(struct list_head *groups_list,
3199 struct btrfs_ioctl_space_info *space);
3200 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
3201 struct btrfs_ioctl_balance_args *bargs);
3202 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
3203 struct file *dst_file, u64 dst_loff);
3206 int btrfs_auto_defrag_init(void);
3207 void btrfs_auto_defrag_exit(void);
3208 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3209 struct inode *inode);
3210 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3211 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3212 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3213 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
3215 extern const struct file_operations btrfs_file_operations;
3216 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3217 struct btrfs_root *root, struct inode *inode,
3218 struct btrfs_path *path, u64 start, u64 end,
3219 u64 *drop_end, int drop_cache,
3221 u32 extent_item_size,
3223 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3224 struct btrfs_root *root, struct inode *inode, u64 start,
3225 u64 end, int drop_cache);
3226 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3227 struct inode *inode, u64 start, u64 end);
3228 int btrfs_release_file(struct inode *inode, struct file *file);
3229 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
3230 struct page **pages, size_t num_pages,
3231 loff_t pos, size_t write_bytes,
3232 struct extent_state **cached);
3233 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3234 ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
3235 struct file *file_out, loff_t pos_out,
3236 size_t len, unsigned int flags);
3237 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
3238 struct file *file_out, loff_t pos_out, u64 len);
3241 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3242 struct btrfs_root *root);
3245 int btrfs_init_sysfs(void);
3246 void btrfs_exit_sysfs(void);
3247 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3248 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3251 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
3254 int btrfs_parse_options(struct btrfs_root *root, char *options,
3255 unsigned long new_flags);
3256 int btrfs_sync_fs(struct super_block *sb, int wait);
3258 static inline __printf(2, 3)
3259 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3263 #ifdef CONFIG_PRINTK
3265 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3267 #define btrfs_printk(fs_info, fmt, args...) \
3268 btrfs_no_printk(fs_info, fmt, ##args)
3271 #define btrfs_emerg(fs_info, fmt, args...) \
3272 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3273 #define btrfs_alert(fs_info, fmt, args...) \
3274 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3275 #define btrfs_crit(fs_info, fmt, args...) \
3276 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3277 #define btrfs_err(fs_info, fmt, args...) \
3278 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3279 #define btrfs_warn(fs_info, fmt, args...) \
3280 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3281 #define btrfs_notice(fs_info, fmt, args...) \
3282 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3283 #define btrfs_info(fs_info, fmt, args...) \
3284 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3287 * Wrappers that use printk_in_rcu
3289 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3290 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3291 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3292 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3293 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3294 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3295 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3296 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3297 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3298 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3299 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3300 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3301 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3302 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3305 * Wrappers that use a ratelimited printk_in_rcu
3307 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3308 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3309 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3310 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3311 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3312 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3313 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3314 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3315 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3316 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3317 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3318 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3319 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3320 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3323 * Wrappers that use a ratelimited printk
3325 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3326 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3327 #define btrfs_alert_rl(fs_info, fmt, args...) \
3328 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3329 #define btrfs_crit_rl(fs_info, fmt, args...) \
3330 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3331 #define btrfs_err_rl(fs_info, fmt, args...) \
3332 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3333 #define btrfs_warn_rl(fs_info, fmt, args...) \
3334 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3335 #define btrfs_notice_rl(fs_info, fmt, args...) \
3336 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3337 #define btrfs_info_rl(fs_info, fmt, args...) \
3338 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3340 #if defined(CONFIG_DYNAMIC_DEBUG)
3341 #define btrfs_debug(fs_info, fmt, args...) \
3343 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3344 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3345 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
3347 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3349 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3350 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3351 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
3353 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3355 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3356 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3357 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
3360 #define btrfs_debug_rl(fs_info, fmt, args...) \
3362 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
3363 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
3364 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
3367 #elif defined(DEBUG)
3368 #define btrfs_debug(fs_info, fmt, args...) \
3369 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3370 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3371 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3372 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3373 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3374 #define btrfs_debug_rl(fs_info, fmt, args...) \
3375 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3377 #define btrfs_debug(fs_info, fmt, args...) \
3378 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3379 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3380 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3381 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3382 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3383 #define btrfs_debug_rl(fs_info, fmt, args...) \
3384 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3387 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3390 btrfs_printk(fs_info, fmt, ##args); \
3391 rcu_read_unlock(); \
3394 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3396 static DEFINE_RATELIMIT_STATE(_rs, \
3397 DEFAULT_RATELIMIT_INTERVAL, \
3398 DEFAULT_RATELIMIT_BURST); \
3399 if (__ratelimit(&_rs)) \
3400 btrfs_printk(fs_info, fmt, ##args); \
3403 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3406 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3407 rcu_read_unlock(); \
3410 #ifdef CONFIG_BTRFS_ASSERT
3413 static inline void assfail(char *expr, char *file, int line)
3415 pr_err("assertion failed: %s, file: %s, line: %d\n",
3420 #define ASSERT(expr) \
3421 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3423 #define ASSERT(expr) ((void)0)
3428 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3429 unsigned int line, int errno, const char *fmt, ...);
3431 const char *btrfs_decode_error(int errno);
3434 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3435 const char *function,
3436 unsigned int line, int errno);
3439 * Call btrfs_abort_transaction as early as possible when an error condition is
3440 * detected, that way the exact line number is reported.
3442 #define btrfs_abort_transaction(trans, errno) \
3444 /* Report first abort since mount */ \
3445 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3446 &((trans)->fs_info->fs_state))) { \
3447 WARN(1, KERN_DEBUG \
3448 "BTRFS: Transaction aborted (error %d)\n", \
3451 __btrfs_abort_transaction((trans), __func__, \
3452 __LINE__, (errno)); \
3455 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3457 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3458 (errno), fmt, ##args); \
3463 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3464 unsigned int line, int errno, const char *fmt, ...);
3466 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3467 * will panic(). Otherwise we BUG() here.
3469 #define btrfs_panic(fs_info, errno, fmt, args...) \
3471 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3476 /* compatibility and incompatibility defines */
3478 #define btrfs_set_fs_incompat(__fs_info, opt) \
3479 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3481 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3484 struct btrfs_super_block *disk_super;
3487 disk_super = fs_info->super_copy;
3488 features = btrfs_super_incompat_flags(disk_super);
3489 if (!(features & flag)) {
3490 spin_lock(&fs_info->super_lock);
3491 features = btrfs_super_incompat_flags(disk_super);
3492 if (!(features & flag)) {
3494 btrfs_set_super_incompat_flags(disk_super, features);
3495 btrfs_info(fs_info, "setting %llu feature flag",
3498 spin_unlock(&fs_info->super_lock);
3502 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3503 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3505 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3508 struct btrfs_super_block *disk_super;
3511 disk_super = fs_info->super_copy;
3512 features = btrfs_super_incompat_flags(disk_super);
3513 if (features & flag) {
3514 spin_lock(&fs_info->super_lock);
3515 features = btrfs_super_incompat_flags(disk_super);
3516 if (features & flag) {
3518 btrfs_set_super_incompat_flags(disk_super, features);
3519 btrfs_info(fs_info, "clearing %llu feature flag",
3522 spin_unlock(&fs_info->super_lock);
3526 #define btrfs_fs_incompat(fs_info, opt) \
3527 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3529 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3531 struct btrfs_super_block *disk_super;
3532 disk_super = fs_info->super_copy;
3533 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3536 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3537 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3539 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3542 struct btrfs_super_block *disk_super;
3545 disk_super = fs_info->super_copy;
3546 features = btrfs_super_compat_ro_flags(disk_super);
3547 if (!(features & flag)) {
3548 spin_lock(&fs_info->super_lock);
3549 features = btrfs_super_compat_ro_flags(disk_super);
3550 if (!(features & flag)) {
3552 btrfs_set_super_compat_ro_flags(disk_super, features);
3553 btrfs_info(fs_info, "setting %llu ro feature flag",
3556 spin_unlock(&fs_info->super_lock);
3560 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3561 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3563 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3566 struct btrfs_super_block *disk_super;
3569 disk_super = fs_info->super_copy;
3570 features = btrfs_super_compat_ro_flags(disk_super);
3571 if (features & flag) {
3572 spin_lock(&fs_info->super_lock);
3573 features = btrfs_super_compat_ro_flags(disk_super);
3574 if (features & flag) {
3576 btrfs_set_super_compat_ro_flags(disk_super, features);
3577 btrfs_info(fs_info, "clearing %llu ro feature flag",
3580 spin_unlock(&fs_info->super_lock);
3584 #define btrfs_fs_compat_ro(fs_info, opt) \
3585 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3587 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3589 struct btrfs_super_block *disk_super;
3590 disk_super = fs_info->super_copy;
3591 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3595 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3596 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3597 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3598 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3599 struct inode *inode, struct inode *dir);
3601 #define btrfs_get_acl NULL
3602 #define btrfs_set_acl NULL
3603 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3604 struct inode *inode, struct inode *dir)
3611 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
3612 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3613 struct btrfs_root *root);
3614 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3615 struct btrfs_root *root);
3616 int btrfs_recover_relocation(struct btrfs_root *root);
3617 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3618 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3619 struct btrfs_root *root, struct extent_buffer *buf,
3620 struct extent_buffer *cow);
3621 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3622 u64 *bytes_to_reserve);
3623 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3624 struct btrfs_pending_snapshot *pending);
3627 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3628 u64 end, struct btrfs_scrub_progress *progress,
3629 int readonly, int is_dev_replace);
3630 void btrfs_scrub_pause(struct btrfs_root *root);
3631 void btrfs_scrub_continue(struct btrfs_root *root);
3632 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3633 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
3634 struct btrfs_device *dev);
3635 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
3636 struct btrfs_scrub_progress *progress);
3639 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3640 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3641 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3643 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3645 btrfs_bio_counter_sub(fs_info, 1);
3649 struct reada_control {
3650 struct btrfs_root *root; /* tree to prefetch */
3651 struct btrfs_key key_start;
3652 struct btrfs_key key_end; /* exclusive */
3655 wait_queue_head_t wait;
3657 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3658 struct btrfs_key *start, struct btrfs_key *end);
3659 int btrfs_reada_wait(void *handle);
3660 void btrfs_reada_detach(void *handle);
3661 int btree_readahead_hook(struct btrfs_fs_info *fs_info,
3662 struct extent_buffer *eb, u64 start, int err);
3664 static inline int is_fstree(u64 rootid)
3666 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3667 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3668 !btrfs_qgroup_level(rootid)))
3673 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3675 return signal_pending(current);
3678 /* Sanity test specific functions */
3679 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3680 void btrfs_test_destroy_inode(struct inode *inode);
3683 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3685 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3686 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
3687 &fs_info->fs_state)))