1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
38 struct btrfs_trans_handle;
39 struct btrfs_transaction;
40 struct btrfs_pending_snapshot;
41 struct btrfs_delayed_ref_root;
42 struct btrfs_space_info;
43 struct btrfs_block_group;
44 extern struct kmem_cache *btrfs_trans_handle_cachep;
45 extern struct kmem_cache *btrfs_bit_radix_cachep;
46 extern struct kmem_cache *btrfs_path_cachep;
47 extern struct kmem_cache *btrfs_free_space_cachep;
48 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
49 struct btrfs_ordered_sum;
52 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
55 * Maximum number of mirrors that can be available for all profiles counting
56 * the target device of dev-replace as one. During an active device replace
57 * procedure, the target device of the copy operation is a mirror for the
58 * filesystem data as well that can be used to read data in order to repair
59 * read errors on other disks.
61 * Current value is derived from RAID1C4 with 4 copies.
63 #define BTRFS_MAX_MIRRORS (4 + 1)
65 #define BTRFS_MAX_LEVEL 8
67 #define BTRFS_OLDEST_GENERATION 0ULL
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 #define BTRFS_EMPTY_DIR_SIZE 0
90 /* ioprio of readahead is set to idle */
91 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
93 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
96 * Use large batch size to reduce overhead of metadata updates. On the reader
97 * side, we only read it when we are close to ENOSPC and the read overhead is
98 * mostly related to the number of CPUs, so it is OK to use arbitrary large
101 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
103 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
106 * Deltas are an effective way to populate global statistics. Give macro names
107 * to make it clear what we're doing. An example is discard_extents in
108 * btrfs_free_space_ctl.
110 #define BTRFS_STAT_NR_ENTRIES 2
111 #define BTRFS_STAT_CURR 0
112 #define BTRFS_STAT_PREV 1
115 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
117 static inline u32 count_max_extents(u64 size)
119 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
122 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
124 BUG_ON(num_stripes == 0);
125 return sizeof(struct btrfs_chunk) +
126 sizeof(struct btrfs_stripe) * (num_stripes - 1);
130 * Runtime (in-memory) states of filesystem
133 /* Global indicator of serious filesystem errors */
134 BTRFS_FS_STATE_ERROR,
136 * Filesystem is being remounted, allow to skip some operations, like
139 BTRFS_FS_STATE_REMOUNTING,
140 /* Track if a transaction abort has been reported on this filesystem */
141 BTRFS_FS_STATE_TRANS_ABORTED,
143 * Bio operations should be blocked on this filesystem because a source
144 * or target device is being destroyed as part of a device replace
146 BTRFS_FS_STATE_DEV_REPLACING,
147 /* The btrfs_fs_info created for self-tests */
148 BTRFS_FS_STATE_DUMMY_FS_INFO,
151 #define BTRFS_BACKREF_REV_MAX 256
152 #define BTRFS_BACKREF_REV_SHIFT 56
153 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
154 BTRFS_BACKREF_REV_SHIFT)
156 #define BTRFS_OLD_BACKREF_REV 0
157 #define BTRFS_MIXED_BACKREF_REV 1
160 * every tree block (leaf or node) starts with this header.
162 struct btrfs_header {
163 /* these first four must match the super block */
164 u8 csum[BTRFS_CSUM_SIZE];
165 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
166 __le64 bytenr; /* which block this node is supposed to live in */
169 /* allowed to be different from the super from here on down */
170 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
175 } __attribute__ ((__packed__));
178 * this is a very generous portion of the super block, giving us
179 * room to translate 14 chunks with 3 stripes each.
181 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
184 * just in case we somehow lose the roots and are not able to mount,
185 * we store an array of the roots from previous transactions
188 #define BTRFS_NUM_BACKUP_ROOTS 4
189 struct btrfs_root_backup {
191 __le64 tree_root_gen;
194 __le64 chunk_root_gen;
197 __le64 extent_root_gen;
206 __le64 csum_root_gen;
216 u8 extent_root_level;
220 /* future and to align */
222 } __attribute__ ((__packed__));
225 * the super block basically lists the main trees of the FS
226 * it currently lacks any block count etc etc
228 struct btrfs_super_block {
229 /* the first 4 fields must match struct btrfs_header */
230 u8 csum[BTRFS_CSUM_SIZE];
231 /* FS specific UUID, visible to user */
232 u8 fsid[BTRFS_FSID_SIZE];
233 __le64 bytenr; /* this block number */
236 /* allowed to be different from the btrfs_header from here own down */
243 /* this will help find the new super based on the log root */
244 __le64 log_root_transid;
247 __le64 root_dir_objectid;
251 __le32 __unused_leafsize;
253 __le32 sys_chunk_array_size;
254 __le64 chunk_root_generation;
256 __le64 compat_ro_flags;
257 __le64 incompat_flags;
262 struct btrfs_dev_item dev_item;
264 char label[BTRFS_LABEL_SIZE];
266 __le64 cache_generation;
267 __le64 uuid_tree_generation;
269 /* the UUID written into btree blocks */
270 u8 metadata_uuid[BTRFS_FSID_SIZE];
272 /* future expansion */
274 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
275 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
276 } __attribute__ ((__packed__));
279 * Compat flags that we support. If any incompat flags are set other than the
280 * ones specified below then we will fail to mount
282 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
283 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
284 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
286 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
287 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
288 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
293 #define BTRFS_FEATURE_INCOMPAT_SUPP \
294 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
295 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
296 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
297 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
298 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
299 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
300 BTRFS_FEATURE_INCOMPAT_RAID56 | \
301 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
302 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
303 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
304 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
305 BTRFS_FEATURE_INCOMPAT_RAID1C34)
307 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
308 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
309 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
312 * A leaf is full of items. offset and size tell us where to find
313 * the item in the leaf (relative to the start of the data area)
316 struct btrfs_disk_key key;
319 } __attribute__ ((__packed__));
322 * leaves have an item area and a data area:
323 * [item0, item1....itemN] [free space] [dataN...data1, data0]
325 * The data is separate from the items to get the keys closer together
329 struct btrfs_header header;
330 struct btrfs_item items[];
331 } __attribute__ ((__packed__));
334 * all non-leaf blocks are nodes, they hold only keys and pointers to
337 struct btrfs_key_ptr {
338 struct btrfs_disk_key key;
341 } __attribute__ ((__packed__));
344 struct btrfs_header header;
345 struct btrfs_key_ptr ptrs[];
346 } __attribute__ ((__packed__));
349 * btrfs_paths remember the path taken from the root down to the leaf.
350 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
351 * to any other levels that are present.
353 * The slots array records the index of the item or block pointer
354 * used while walking the tree.
356 enum { READA_NONE, READA_BACK, READA_FORWARD };
358 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
359 int slots[BTRFS_MAX_LEVEL];
360 /* if there is real range locking, this locks field will change */
361 u8 locks[BTRFS_MAX_LEVEL];
363 /* keep some upper locks as we walk down */
367 * set by btrfs_split_item, tells search_slot to keep all locks
368 * and to force calls to keep space in the nodes
370 unsigned int search_for_split:1;
371 unsigned int keep_locks:1;
372 unsigned int skip_locking:1;
373 unsigned int leave_spinning:1;
374 unsigned int search_commit_root:1;
375 unsigned int need_commit_sem:1;
376 unsigned int skip_release_on_error:1;
377 unsigned int recurse:1;
379 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
380 sizeof(struct btrfs_item))
381 struct btrfs_dev_replace {
382 u64 replace_state; /* see #define above */
383 time64_t time_started; /* seconds since 1-Jan-1970 */
384 time64_t time_stopped; /* seconds since 1-Jan-1970 */
385 atomic64_t num_write_errors;
386 atomic64_t num_uncorrectable_read_errors;
389 u64 committed_cursor_left;
390 u64 cursor_left_last_write_of_item;
393 u64 cont_reading_from_srcdev_mode; /* see #define above */
396 int item_needs_writeback;
397 struct btrfs_device *srcdev;
398 struct btrfs_device *tgtdev;
400 struct mutex lock_finishing_cancel_unmount;
401 struct rw_semaphore rwsem;
403 struct btrfs_scrub_progress scrub_progress;
405 struct percpu_counter bio_counter;
406 wait_queue_head_t replace_wait;
410 * free clusters are used to claim free space in relatively large chunks,
411 * allowing us to do less seeky writes. They are used for all metadata
412 * allocations. In ssd_spread mode they are also used for data allocations.
414 struct btrfs_free_cluster {
416 spinlock_t refill_lock;
419 /* largest extent in this cluster */
422 /* first extent starting offset */
425 /* We did a full search and couldn't create a cluster */
428 struct btrfs_block_group *block_group;
430 * when a cluster is allocated from a block group, we put the
431 * cluster onto a list in the block group so that it can
432 * be freed before the block group is freed.
434 struct list_head block_group_list;
437 enum btrfs_caching_type {
441 BTRFS_CACHE_FINISHED,
446 * Tree to record all locked full stripes of a RAID5/6 block group
448 struct btrfs_full_stripe_locks_tree {
453 /* Discard control. */
455 * Async discard uses multiple lists to differentiate the discard filter
456 * parameters. Index 0 is for completely free block groups where we need to
457 * ensure the entire block group is trimmed without being lossy. Indices
458 * afterwards represent monotonically decreasing discard filter sizes to
459 * prioritize what should be discarded next.
461 #define BTRFS_NR_DISCARD_LISTS 3
462 #define BTRFS_DISCARD_INDEX_UNUSED 0
463 #define BTRFS_DISCARD_INDEX_START 1
465 struct btrfs_discard_ctl {
466 struct workqueue_struct *discard_workers;
467 struct delayed_work work;
469 struct btrfs_block_group *block_group;
470 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
472 atomic_t discardable_extents;
473 atomic64_t discardable_bytes;
474 u64 max_discard_size;
478 u64 discard_extent_bytes;
479 u64 discard_bitmap_bytes;
480 atomic64_t discard_bytes_saved;
483 /* delayed seq elem */
485 struct list_head list;
489 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
491 #define SEQ_LAST ((u64)-1)
493 enum btrfs_orphan_cleanup_state {
494 ORPHAN_CLEANUP_STARTED = 1,
495 ORPHAN_CLEANUP_DONE = 2,
498 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
501 struct reloc_control;
503 struct btrfs_fs_devices;
504 struct btrfs_balance_control;
505 struct btrfs_delayed_root;
508 * Block group or device which contains an active swapfile. Used for preventing
509 * unsafe operations while a swapfile is active.
511 * These are sorted on (ptr, inode) (note that a block group or device can
512 * contain more than one swapfile). We compare the pointer values because we
513 * don't actually care what the object is, we just need a quick check whether
514 * the object exists in the rbtree.
516 struct btrfs_swapfile_pin {
521 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
522 * points to a struct btrfs_device.
527 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
531 BTRFS_FS_CLOSING_START,
532 BTRFS_FS_CLOSING_DONE,
533 BTRFS_FS_LOG_RECOVERING,
535 BTRFS_FS_QUOTA_ENABLED,
536 BTRFS_FS_UPDATE_UUID_TREE_GEN,
537 BTRFS_FS_CREATING_FREE_SPACE_TREE,
541 BTRFS_FS_QUOTA_OVERRIDE,
542 /* Used to record internally whether fs has been frozen */
545 * Indicate that balance has been set up from the ioctl and is in the
546 * main phase. The fs_info::balance_ctl is initialized.
547 * Set and cleared while holding fs_info::balance_mutex.
549 BTRFS_FS_BALANCE_RUNNING,
551 /* Indicate that the cleaner thread is awake and doing something. */
552 BTRFS_FS_CLEANER_RUNNING,
555 * The checksumming has an optimized version and is considered fast,
556 * so we don't need to offload checksums to workqueues.
558 BTRFS_FS_CSUM_IMPL_FAST,
560 /* Indicate that the discard workqueue can service discards. */
561 BTRFS_FS_DISCARD_RUNNING,
565 * Exclusive operations (device replace, resize, device add/remove, balance)
567 enum btrfs_exclusive_operation {
569 BTRFS_EXCLOP_BALANCE,
570 BTRFS_EXCLOP_DEV_ADD,
571 BTRFS_EXCLOP_DEV_REMOVE,
572 BTRFS_EXCLOP_DEV_REPLACE,
574 BTRFS_EXCLOP_SWAP_ACTIVATE,
577 struct btrfs_fs_info {
578 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
580 struct btrfs_root *extent_root;
581 struct btrfs_root *tree_root;
582 struct btrfs_root *chunk_root;
583 struct btrfs_root *dev_root;
584 struct btrfs_root *fs_root;
585 struct btrfs_root *csum_root;
586 struct btrfs_root *quota_root;
587 struct btrfs_root *uuid_root;
588 struct btrfs_root *free_space_root;
589 struct btrfs_root *data_reloc_root;
591 /* the log root tree is a directory of all the other log roots */
592 struct btrfs_root *log_root_tree;
594 spinlock_t fs_roots_radix_lock;
595 struct radix_tree_root fs_roots_radix;
597 /* block group cache stuff */
598 spinlock_t block_group_cache_lock;
599 u64 first_logical_byte;
600 struct rb_root block_group_cache_tree;
602 /* keep track of unallocated space */
603 atomic64_t free_chunk_space;
605 /* Track ranges which are used by log trees blocks/logged data extents */
606 struct extent_io_tree excluded_extents;
608 /* logical->physical extent mapping */
609 struct extent_map_tree mapping_tree;
612 * block reservation for extent, checksum, root tree and
613 * delayed dir index item
615 struct btrfs_block_rsv global_block_rsv;
616 /* block reservation for metadata operations */
617 struct btrfs_block_rsv trans_block_rsv;
618 /* block reservation for chunk tree */
619 struct btrfs_block_rsv chunk_block_rsv;
620 /* block reservation for delayed operations */
621 struct btrfs_block_rsv delayed_block_rsv;
622 /* block reservation for delayed refs */
623 struct btrfs_block_rsv delayed_refs_rsv;
625 struct btrfs_block_rsv empty_block_rsv;
628 u64 last_trans_committed;
629 u64 avg_delayed_ref_runtime;
632 * this is updated to the current trans every time a full commit
633 * is required instead of the faster short fsync log commits
635 u64 last_trans_log_full_commit;
636 unsigned long mount_opt;
638 * Track requests for actions that need to be done during transaction
639 * commit (like for some mount options).
641 unsigned long pending_changes;
642 unsigned long compress_type:4;
643 unsigned int compress_level;
646 * It is a suggestive number, the read side is safe even it gets a
647 * wrong number because we will write out the data into a regular
648 * extent. The write side(mount/remount) is under ->s_umount lock,
649 * so it is also safe.
653 struct btrfs_transaction *running_transaction;
654 wait_queue_head_t transaction_throttle;
655 wait_queue_head_t transaction_wait;
656 wait_queue_head_t transaction_blocked_wait;
657 wait_queue_head_t async_submit_wait;
660 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
661 * when they are updated.
663 * Because we do not clear the flags for ever, so we needn't use
664 * the lock on the read side.
666 * We also needn't use the lock when we mount the fs, because
667 * there is no other task which will update the flag.
669 spinlock_t super_lock;
670 struct btrfs_super_block *super_copy;
671 struct btrfs_super_block *super_for_commit;
672 struct super_block *sb;
673 struct inode *btree_inode;
674 struct mutex tree_log_mutex;
675 struct mutex transaction_kthread_mutex;
676 struct mutex cleaner_mutex;
677 struct mutex chunk_mutex;
680 * this is taken to make sure we don't set block groups ro after
681 * the free space cache has been allocated on them
683 struct mutex ro_block_group_mutex;
685 /* this is used during read/modify/write to make sure
686 * no two ios are trying to mod the same stripe at the same
689 struct btrfs_stripe_hash_table *stripe_hash_table;
692 * this protects the ordered operations list only while we are
693 * processing all of the entries on it. This way we make
694 * sure the commit code doesn't find the list temporarily empty
695 * because another function happens to be doing non-waiting preflush
696 * before jumping into the main commit.
698 struct mutex ordered_operations_mutex;
700 struct rw_semaphore commit_root_sem;
702 struct rw_semaphore cleanup_work_sem;
704 struct rw_semaphore subvol_sem;
706 spinlock_t trans_lock;
708 * the reloc mutex goes with the trans lock, it is taken
709 * during commit to protect us from the relocation code
711 struct mutex reloc_mutex;
713 struct list_head trans_list;
714 struct list_head dead_roots;
715 struct list_head caching_block_groups;
717 spinlock_t delayed_iput_lock;
718 struct list_head delayed_iputs;
719 atomic_t nr_delayed_iputs;
720 wait_queue_head_t delayed_iputs_wait;
722 atomic64_t tree_mod_seq;
724 /* this protects tree_mod_log and tree_mod_seq_list */
725 rwlock_t tree_mod_log_lock;
726 struct rb_root tree_mod_log;
727 struct list_head tree_mod_seq_list;
729 atomic_t async_delalloc_pages;
732 * this is used to protect the following list -- ordered_roots.
734 spinlock_t ordered_root_lock;
737 * all fs/file tree roots in which there are data=ordered extents
738 * pending writeback are added into this list.
740 * these can span multiple transactions and basically include
741 * every dirty data page that isn't from nodatacow
743 struct list_head ordered_roots;
745 struct mutex delalloc_root_mutex;
746 spinlock_t delalloc_root_lock;
747 /* all fs/file tree roots that have delalloc inodes. */
748 struct list_head delalloc_roots;
751 * there is a pool of worker threads for checksumming during writes
752 * and a pool for checksumming after reads. This is because readers
753 * can run with FS locks held, and the writers may be waiting for
754 * those locks. We don't want ordering in the pending list to cause
755 * deadlocks, and so the two are serviced separately.
757 * A third pool does submit_bio to avoid deadlocking with the other
760 struct btrfs_workqueue *workers;
761 struct btrfs_workqueue *delalloc_workers;
762 struct btrfs_workqueue *flush_workers;
763 struct btrfs_workqueue *endio_workers;
764 struct btrfs_workqueue *endio_meta_workers;
765 struct btrfs_workqueue *endio_raid56_workers;
766 struct btrfs_workqueue *rmw_workers;
767 struct btrfs_workqueue *endio_meta_write_workers;
768 struct btrfs_workqueue *endio_write_workers;
769 struct btrfs_workqueue *endio_freespace_worker;
770 struct btrfs_workqueue *caching_workers;
771 struct btrfs_workqueue *readahead_workers;
774 * fixup workers take dirty pages that didn't properly go through
775 * the cow mechanism and make them safe to write. It happens
776 * for the sys_munmap function call path
778 struct btrfs_workqueue *fixup_workers;
779 struct btrfs_workqueue *delayed_workers;
781 struct task_struct *transaction_kthread;
782 struct task_struct *cleaner_kthread;
783 u32 thread_pool_size;
785 struct kobject *space_info_kobj;
786 struct kobject *qgroups_kobj;
790 /* used to keep from writing metadata until there is a nice batch */
791 struct percpu_counter dirty_metadata_bytes;
792 struct percpu_counter delalloc_bytes;
793 struct percpu_counter dio_bytes;
794 s32 dirty_metadata_batch;
797 struct list_head dirty_cowonly_roots;
799 struct btrfs_fs_devices *fs_devices;
802 * The space_info list is effectively read only after initial
803 * setup. It is populated at mount time and cleaned up after
804 * all block groups are removed. RCU is used to protect it.
806 struct list_head space_info;
808 struct btrfs_space_info *data_sinfo;
810 struct reloc_control *reloc_ctl;
812 /* data_alloc_cluster is only used in ssd_spread mode */
813 struct btrfs_free_cluster data_alloc_cluster;
815 /* all metadata allocations go through this cluster */
816 struct btrfs_free_cluster meta_alloc_cluster;
818 /* auto defrag inodes go here */
819 spinlock_t defrag_inodes_lock;
820 struct rb_root defrag_inodes;
821 atomic_t defrag_running;
823 /* Used to protect avail_{data, metadata, system}_alloc_bits */
824 seqlock_t profiles_lock;
826 * these three are in extended format (availability of single
827 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
828 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
830 u64 avail_data_alloc_bits;
831 u64 avail_metadata_alloc_bits;
832 u64 avail_system_alloc_bits;
834 /* restriper state */
835 spinlock_t balance_lock;
836 struct mutex balance_mutex;
837 atomic_t balance_pause_req;
838 atomic_t balance_cancel_req;
839 struct btrfs_balance_control *balance_ctl;
840 wait_queue_head_t balance_wait_q;
842 u32 data_chunk_allocations;
847 /* private scrub information */
848 struct mutex scrub_lock;
849 atomic_t scrubs_running;
850 atomic_t scrub_pause_req;
851 atomic_t scrubs_paused;
852 atomic_t scrub_cancel_req;
853 wait_queue_head_t scrub_pause_wait;
855 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
858 refcount_t scrub_workers_refcnt;
859 struct btrfs_workqueue *scrub_workers;
860 struct btrfs_workqueue *scrub_wr_completion_workers;
861 struct btrfs_workqueue *scrub_parity_workers;
863 struct btrfs_discard_ctl discard_ctl;
865 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
866 u32 check_integrity_print_mask;
868 /* is qgroup tracking in a consistent state? */
871 /* holds configuration and tracking. Protected by qgroup_lock */
872 struct rb_root qgroup_tree;
873 spinlock_t qgroup_lock;
876 * used to avoid frequently calling ulist_alloc()/ulist_free()
877 * when doing qgroup accounting, it must be protected by qgroup_lock.
879 struct ulist *qgroup_ulist;
881 /* protect user change for quota operations */
882 struct mutex qgroup_ioctl_lock;
884 /* list of dirty qgroups to be written at next commit */
885 struct list_head dirty_qgroups;
887 /* used by qgroup for an efficient tree traversal */
890 /* qgroup rescan items */
891 struct mutex qgroup_rescan_lock; /* protects the progress item */
892 struct btrfs_key qgroup_rescan_progress;
893 struct btrfs_workqueue *qgroup_rescan_workers;
894 struct completion qgroup_rescan_completion;
895 struct btrfs_work qgroup_rescan_work;
896 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
898 /* filesystem state */
899 unsigned long fs_state;
901 struct btrfs_delayed_root *delayed_root;
904 spinlock_t reada_lock;
905 struct radix_tree_root reada_tree;
907 /* readahead works cnt */
908 atomic_t reada_works_cnt;
910 /* Extent buffer radix tree */
911 spinlock_t buffer_lock;
912 struct radix_tree_root buffer_radix;
914 /* next backup root to be overwritten */
915 int backup_root_index;
917 /* device replace state */
918 struct btrfs_dev_replace dev_replace;
920 struct semaphore uuid_tree_rescan_sem;
922 /* Used to reclaim the metadata space in the background. */
923 struct work_struct async_reclaim_work;
924 struct work_struct async_data_reclaim_work;
926 spinlock_t unused_bgs_lock;
927 struct list_head unused_bgs;
928 struct mutex unused_bg_unpin_mutex;
929 struct mutex delete_unused_bgs_mutex;
931 /* Cached block sizes */
936 /* Block groups and devices containing active swapfiles. */
937 spinlock_t swapfile_pins_lock;
938 struct rb_root swapfile_pins;
940 struct crypto_shash *csum_shash;
943 * Number of send operations in progress.
944 * Updated while holding fs_info::balance_mutex.
946 int send_in_progress;
948 /* Type of exclusive operation running */
949 unsigned long exclusive_operation;
951 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
952 spinlock_t ref_verify_lock;
953 struct rb_root block_tree;
956 #ifdef CONFIG_BTRFS_DEBUG
957 struct kobject *debug_kobj;
958 struct kobject *discard_debug_kobj;
959 struct list_head allocated_roots;
961 spinlock_t eb_leak_lock;
962 struct list_head allocated_ebs;
966 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
968 return sb->s_fs_info;
972 * The state of btrfs root
976 * btrfs_record_root_in_trans is a multi-step process, and it can race
977 * with the balancing code. But the race is very small, and only the
978 * first time the root is added to each transaction. So IN_TRANS_SETUP
979 * is used to tell us when more checks are required
981 BTRFS_ROOT_IN_TRANS_SETUP,
984 * Set if tree blocks of this root can be shared by other roots.
985 * Only subvolume trees and their reloc trees have this bit set.
986 * Conflicts with TRACK_DIRTY bit.
988 * This affects two things:
990 * - How balance works
991 * For shareable roots, we need to use reloc tree and do path
992 * replacement for balance, and need various pre/post hooks for
993 * snapshot creation to handle them.
995 * While for non-shareable trees, we just simply do a tree search
998 * - How dirty roots are tracked
999 * For shareable roots, btrfs_record_root_in_trans() is needed to
1000 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1001 * don't need to set this manually.
1003 BTRFS_ROOT_SHAREABLE,
1004 BTRFS_ROOT_TRACK_DIRTY,
1005 BTRFS_ROOT_IN_RADIX,
1006 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1007 BTRFS_ROOT_DEFRAG_RUNNING,
1008 BTRFS_ROOT_FORCE_COW,
1009 BTRFS_ROOT_MULTI_LOG_TASKS,
1011 BTRFS_ROOT_DELETING,
1014 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1016 * Set for the subvolume tree owning the reloc tree.
1018 BTRFS_ROOT_DEAD_RELOC_TREE,
1019 /* Mark dead root stored on device whose cleanup needs to be resumed */
1020 BTRFS_ROOT_DEAD_TREE,
1021 /* The root has a log tree. Used only for subvolume roots. */
1022 BTRFS_ROOT_HAS_LOG_TREE,
1023 /* Qgroup flushing is in progress */
1024 BTRFS_ROOT_QGROUP_FLUSHING,
1028 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1029 * code. For detail check comment in fs/btrfs/qgroup.c.
1031 struct btrfs_qgroup_swapped_blocks {
1033 /* RM_EMPTY_ROOT() of above blocks[] */
1035 struct rb_root blocks[BTRFS_MAX_LEVEL];
1039 * in ram representation of the tree. extent_root is used for all allocations
1040 * and for the extent tree extent_root root.
1043 struct extent_buffer *node;
1045 struct extent_buffer *commit_root;
1046 struct btrfs_root *log_root;
1047 struct btrfs_root *reloc_root;
1049 unsigned long state;
1050 struct btrfs_root_item root_item;
1051 struct btrfs_key root_key;
1052 struct btrfs_fs_info *fs_info;
1053 struct extent_io_tree dirty_log_pages;
1055 struct mutex objectid_mutex;
1057 spinlock_t accounting_lock;
1058 struct btrfs_block_rsv *block_rsv;
1060 /* free ino cache stuff */
1061 struct btrfs_free_space_ctl *free_ino_ctl;
1062 enum btrfs_caching_type ino_cache_state;
1063 spinlock_t ino_cache_lock;
1064 wait_queue_head_t ino_cache_wait;
1065 struct btrfs_free_space_ctl *free_ino_pinned;
1066 u64 ino_cache_progress;
1067 struct inode *ino_cache_inode;
1069 struct mutex log_mutex;
1070 wait_queue_head_t log_writer_wait;
1071 wait_queue_head_t log_commit_wait[2];
1072 struct list_head log_ctxs[2];
1073 /* Used only for log trees of subvolumes, not for the log root tree */
1074 atomic_t log_writers;
1075 atomic_t log_commit[2];
1076 /* Used only for log trees of subvolumes, not for the log root tree */
1079 /* No matter the commit succeeds or not*/
1080 int log_transid_committed;
1081 /* Just be updated when the commit succeeds. */
1082 int last_log_commit;
1083 pid_t log_start_pid;
1089 u64 highest_objectid;
1091 struct btrfs_key defrag_progress;
1092 struct btrfs_key defrag_max;
1094 /* The dirty list is only used by non-shareable roots */
1095 struct list_head dirty_list;
1097 struct list_head root_list;
1099 spinlock_t log_extents_lock[2];
1100 struct list_head logged_list[2];
1102 int orphan_cleanup_state;
1104 spinlock_t inode_lock;
1105 /* red-black tree that keeps track of in-memory inodes */
1106 struct rb_root inode_tree;
1109 * radix tree that keeps track of delayed nodes of every inode,
1110 * protected by inode_lock
1112 struct radix_tree_root delayed_nodes_tree;
1114 * right now this just gets used so that a root has its own devid
1115 * for stat. It may be used for more later
1119 spinlock_t root_item_lock;
1122 struct mutex delalloc_mutex;
1123 spinlock_t delalloc_lock;
1125 * all of the inodes that have delalloc bytes. It is possible for
1126 * this list to be empty even when there is still dirty data=ordered
1127 * extents waiting to finish IO.
1129 struct list_head delalloc_inodes;
1130 struct list_head delalloc_root;
1131 u64 nr_delalloc_inodes;
1133 struct mutex ordered_extent_mutex;
1135 * this is used by the balancing code to wait for all the pending
1138 spinlock_t ordered_extent_lock;
1141 * all of the data=ordered extents pending writeback
1142 * these can span multiple transactions and basically include
1143 * every dirty data page that isn't from nodatacow
1145 struct list_head ordered_extents;
1146 struct list_head ordered_root;
1147 u64 nr_ordered_extents;
1150 * Not empty if this subvolume root has gone through tree block swap
1153 * Will be used by reloc_control::dirty_subvol_roots.
1155 struct list_head reloc_dirty_list;
1158 * Number of currently running SEND ioctls to prevent
1159 * manipulation with the read-only status via SUBVOL_SETFLAGS
1161 int send_in_progress;
1163 * Number of currently running deduplication operations that have a
1164 * destination inode belonging to this root. Protected by the lock
1167 int dedupe_in_progress;
1168 /* For exclusion of snapshot creation and nocow writes */
1169 struct btrfs_drew_lock snapshot_lock;
1171 atomic_t snapshot_force_cow;
1173 /* For qgroup metadata reserved space */
1174 spinlock_t qgroup_meta_rsv_lock;
1175 u64 qgroup_meta_rsv_pertrans;
1176 u64 qgroup_meta_rsv_prealloc;
1177 wait_queue_head_t qgroup_flush_wait;
1179 /* Number of active swapfiles */
1180 atomic_t nr_swapfiles;
1182 /* Record pairs of swapped blocks for qgroup */
1183 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1185 /* Used only by log trees, when logging csum items */
1186 struct extent_io_tree log_csum_range;
1188 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1192 #ifdef CONFIG_BTRFS_DEBUG
1193 struct list_head leak_list;
1197 struct btrfs_clone_extent_info {
1207 struct btrfs_file_private {
1212 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1215 return info->nodesize - sizeof(struct btrfs_header);
1218 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1220 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1222 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1225 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1227 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1230 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1231 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1232 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1234 return BTRFS_MAX_ITEM_SIZE(info) -
1235 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1238 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1240 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1244 * Flags for mount options.
1246 * Note: don't forget to add new options to btrfs_show_options()
1248 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1249 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1250 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1251 #define BTRFS_MOUNT_SSD (1 << 3)
1252 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1253 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1254 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1255 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1256 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1257 #define BTRFS_MOUNT_NOSSD (1 << 9)
1258 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1259 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1260 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1261 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1262 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1263 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1264 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1265 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1266 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1267 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1268 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1269 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1270 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1271 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1272 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1273 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1274 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1275 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1276 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1277 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1279 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1280 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1282 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1283 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1284 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1285 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1288 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1290 if (!btrfs_test_opt(fs_info, opt)) \
1291 btrfs_info(fs_info, fmt, ##args); \
1292 btrfs_set_opt(fs_info->mount_opt, opt); \
1295 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1297 if (btrfs_test_opt(fs_info, opt)) \
1298 btrfs_info(fs_info, fmt, ##args); \
1299 btrfs_clear_opt(fs_info->mount_opt, opt); \
1303 * Requests for changes that need to be done during transaction commit.
1305 * Internal mount options that are used for special handling of the real
1306 * mount options (eg. cannot be set during remount and have to be set during
1307 * transaction commit)
1310 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1311 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1312 #define BTRFS_PENDING_COMMIT (2)
1314 #define btrfs_test_pending(info, opt) \
1315 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1316 #define btrfs_set_pending(info, opt) \
1317 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1318 #define btrfs_clear_pending(info, opt) \
1319 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1322 * Helpers for setting pending mount option changes.
1324 * Expects corresponding macros
1325 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1327 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1329 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1330 btrfs_info((info), fmt, ##args); \
1331 btrfs_set_pending((info), SET_##opt); \
1332 btrfs_clear_pending((info), CLEAR_##opt); \
1336 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1338 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1339 btrfs_info((info), fmt, ##args); \
1340 btrfs_set_pending((info), CLEAR_##opt); \
1341 btrfs_clear_pending((info), SET_##opt); \
1348 #define BTRFS_INODE_NODATASUM (1 << 0)
1349 #define BTRFS_INODE_NODATACOW (1 << 1)
1350 #define BTRFS_INODE_READONLY (1 << 2)
1351 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1352 #define BTRFS_INODE_PREALLOC (1 << 4)
1353 #define BTRFS_INODE_SYNC (1 << 5)
1354 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1355 #define BTRFS_INODE_APPEND (1 << 7)
1356 #define BTRFS_INODE_NODUMP (1 << 8)
1357 #define BTRFS_INODE_NOATIME (1 << 9)
1358 #define BTRFS_INODE_DIRSYNC (1 << 10)
1359 #define BTRFS_INODE_COMPRESS (1 << 11)
1361 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1363 #define BTRFS_INODE_FLAG_MASK \
1364 (BTRFS_INODE_NODATASUM | \
1365 BTRFS_INODE_NODATACOW | \
1366 BTRFS_INODE_READONLY | \
1367 BTRFS_INODE_NOCOMPRESS | \
1368 BTRFS_INODE_PREALLOC | \
1369 BTRFS_INODE_SYNC | \
1370 BTRFS_INODE_IMMUTABLE | \
1371 BTRFS_INODE_APPEND | \
1372 BTRFS_INODE_NODUMP | \
1373 BTRFS_INODE_NOATIME | \
1374 BTRFS_INODE_DIRSYNC | \
1375 BTRFS_INODE_COMPRESS | \
1376 BTRFS_INODE_ROOT_ITEM_INIT)
1378 struct btrfs_map_token {
1379 struct extent_buffer *eb;
1381 unsigned long offset;
1384 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1385 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1387 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1388 struct extent_buffer *eb)
1391 token->kaddr = page_address(eb->pages[0]);
1395 /* some macros to generate set/get functions for the struct fields. This
1396 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1399 #define le8_to_cpu(v) (v)
1400 #define cpu_to_le8(v) (v)
1403 #define read_eb_member(eb, ptr, type, member, result) (\
1404 read_extent_buffer(eb, (char *)(result), \
1405 ((unsigned long)(ptr)) + \
1406 offsetof(type, member), \
1407 sizeof(((type *)0)->member)))
1409 #define write_eb_member(eb, ptr, type, member, result) (\
1410 write_extent_buffer(eb, (char *)(result), \
1411 ((unsigned long)(ptr)) + \
1412 offsetof(type, member), \
1413 sizeof(((type *)0)->member)))
1415 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1416 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1417 const void *ptr, unsigned long off); \
1418 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1419 const void *ptr, unsigned long off, \
1421 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1422 const void *ptr, unsigned long off); \
1423 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1424 unsigned long off, u##bits val);
1426 DECLARE_BTRFS_SETGET_BITS(8)
1427 DECLARE_BTRFS_SETGET_BITS(16)
1428 DECLARE_BTRFS_SETGET_BITS(32)
1429 DECLARE_BTRFS_SETGET_BITS(64)
1431 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1432 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1435 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1436 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1438 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1441 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1442 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1444 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1447 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1448 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1450 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1451 type *s, u##bits val) \
1453 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1454 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1457 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1458 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1460 const type *p = page_address(eb->pages[0]); \
1461 u##bits res = le##bits##_to_cpu(p->member); \
1464 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1467 type *p = page_address(eb->pages[0]); \
1468 p->member = cpu_to_le##bits(val); \
1471 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1472 static inline u##bits btrfs_##name(const type *s) \
1474 return le##bits##_to_cpu(s->member); \
1476 static inline void btrfs_set_##name(type *s, u##bits val) \
1478 s->member = cpu_to_le##bits(val); \
1482 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1483 struct btrfs_dev_item *s)
1485 BUILD_BUG_ON(sizeof(u64) !=
1486 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1487 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1490 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1491 struct btrfs_dev_item *s,
1494 BUILD_BUG_ON(sizeof(u64) !=
1495 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1496 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1497 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1501 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1502 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1503 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1504 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1505 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1507 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1508 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1509 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1510 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1511 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1512 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1514 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1515 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1517 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1519 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1521 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1523 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1525 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1526 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1528 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1530 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1532 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1535 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1537 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1540 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1542 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1545 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1546 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1547 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1548 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1549 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1550 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1551 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1552 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1553 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1554 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1555 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1557 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1559 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1562 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1563 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1564 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1566 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1568 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1570 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1572 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1573 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1575 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1577 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1578 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1580 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1583 unsigned long offset = (unsigned long)c;
1584 offset += offsetof(struct btrfs_chunk, stripe);
1585 offset += nr * sizeof(struct btrfs_stripe);
1586 return (struct btrfs_stripe *)offset;
1589 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1591 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1594 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1595 struct btrfs_chunk *c, int nr)
1597 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1600 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1601 struct btrfs_chunk *c, int nr)
1603 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1606 /* struct btrfs_block_group_item */
1607 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1609 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1611 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1612 struct btrfs_block_group_item, chunk_objectid, 64);
1614 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1615 struct btrfs_block_group_item, chunk_objectid, 64);
1616 BTRFS_SETGET_FUNCS(block_group_flags,
1617 struct btrfs_block_group_item, flags, 64);
1618 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1619 struct btrfs_block_group_item, flags, 64);
1621 /* struct btrfs_free_space_info */
1622 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1624 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1626 /* struct btrfs_inode_ref */
1627 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1628 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1630 /* struct btrfs_inode_extref */
1631 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1632 parent_objectid, 64);
1633 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1635 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1637 /* struct btrfs_inode_item */
1638 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1639 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1640 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1641 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1642 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1643 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1644 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1645 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1646 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1647 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1648 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1649 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1650 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1652 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1654 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1656 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1657 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1659 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1661 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1662 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1663 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1664 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1665 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1666 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1667 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1668 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1669 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1670 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1672 /* struct btrfs_dev_extent */
1673 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1675 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1676 chunk_objectid, 64);
1677 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1679 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1680 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1681 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1683 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1685 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1687 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1688 struct btrfs_tree_block_info *item,
1689 struct btrfs_disk_key *key)
1691 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1694 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1695 struct btrfs_tree_block_info *item,
1696 struct btrfs_disk_key *key)
1698 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1701 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1703 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1705 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1707 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1710 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1713 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1715 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1718 static inline u32 btrfs_extent_inline_ref_size(int type)
1720 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1721 type == BTRFS_SHARED_BLOCK_REF_KEY)
1722 return sizeof(struct btrfs_extent_inline_ref);
1723 if (type == BTRFS_SHARED_DATA_REF_KEY)
1724 return sizeof(struct btrfs_shared_data_ref) +
1725 sizeof(struct btrfs_extent_inline_ref);
1726 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1727 return sizeof(struct btrfs_extent_data_ref) +
1728 offsetof(struct btrfs_extent_inline_ref, offset);
1732 /* struct btrfs_node */
1733 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1734 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1735 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1737 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1740 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1743 ptr = offsetof(struct btrfs_node, ptrs) +
1744 sizeof(struct btrfs_key_ptr) * nr;
1745 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1748 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1752 ptr = offsetof(struct btrfs_node, ptrs) +
1753 sizeof(struct btrfs_key_ptr) * nr;
1754 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1757 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1760 ptr = offsetof(struct btrfs_node, ptrs) +
1761 sizeof(struct btrfs_key_ptr) * nr;
1762 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1765 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1769 ptr = offsetof(struct btrfs_node, ptrs) +
1770 sizeof(struct btrfs_key_ptr) * nr;
1771 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1774 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1776 return offsetof(struct btrfs_node, ptrs) +
1777 sizeof(struct btrfs_key_ptr) * nr;
1780 void btrfs_node_key(const struct extent_buffer *eb,
1781 struct btrfs_disk_key *disk_key, int nr);
1783 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1784 struct btrfs_disk_key *disk_key, int nr)
1787 ptr = btrfs_node_key_ptr_offset(nr);
1788 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1789 struct btrfs_key_ptr, key, disk_key);
1792 /* struct btrfs_item */
1793 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1794 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1795 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1796 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1798 static inline unsigned long btrfs_item_nr_offset(int nr)
1800 return offsetof(struct btrfs_leaf, items) +
1801 sizeof(struct btrfs_item) * nr;
1804 static inline struct btrfs_item *btrfs_item_nr(int nr)
1806 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1809 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1810 struct btrfs_item *item)
1812 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1815 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1817 return btrfs_item_end(eb, btrfs_item_nr(nr));
1820 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1822 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1825 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1827 return btrfs_item_size(eb, btrfs_item_nr(nr));
1830 static inline void btrfs_item_key(const struct extent_buffer *eb,
1831 struct btrfs_disk_key *disk_key, int nr)
1833 struct btrfs_item *item = btrfs_item_nr(nr);
1834 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1837 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1838 struct btrfs_disk_key *disk_key, int nr)
1840 struct btrfs_item *item = btrfs_item_nr(nr);
1841 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1844 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1847 * struct btrfs_root_ref
1849 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1850 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1851 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1853 /* struct btrfs_dir_item */
1854 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1855 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1856 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1857 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1858 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1859 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1861 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1863 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1866 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1867 const struct btrfs_dir_item *item,
1868 struct btrfs_disk_key *key)
1870 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1873 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1874 struct btrfs_dir_item *item,
1875 const struct btrfs_disk_key *key)
1877 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1880 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1882 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1884 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1887 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1888 const struct btrfs_free_space_header *h,
1889 struct btrfs_disk_key *key)
1891 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1894 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1895 struct btrfs_free_space_header *h,
1896 const struct btrfs_disk_key *key)
1898 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1901 /* struct btrfs_disk_key */
1902 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1904 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1905 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1907 #ifdef __LITTLE_ENDIAN
1910 * Optimized helpers for little-endian architectures where CPU and on-disk
1911 * structures have the same endianness and we can skip conversions.
1914 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
1915 const struct btrfs_disk_key *disk_key)
1917 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
1920 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
1921 const struct btrfs_key *cpu_key)
1923 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
1926 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1927 struct btrfs_key *cpu_key, int nr)
1929 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1931 btrfs_node_key(eb, disk_key, nr);
1934 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1935 struct btrfs_key *cpu_key, int nr)
1937 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1939 btrfs_item_key(eb, disk_key, nr);
1942 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1943 const struct btrfs_dir_item *item,
1944 struct btrfs_key *cpu_key)
1946 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1948 btrfs_dir_item_key(eb, item, disk_key);
1953 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1954 const struct btrfs_disk_key *disk)
1956 cpu->offset = le64_to_cpu(disk->offset);
1957 cpu->type = disk->type;
1958 cpu->objectid = le64_to_cpu(disk->objectid);
1961 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1962 const struct btrfs_key *cpu)
1964 disk->offset = cpu_to_le64(cpu->offset);
1965 disk->type = cpu->type;
1966 disk->objectid = cpu_to_le64(cpu->objectid);
1969 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1970 struct btrfs_key *key, int nr)
1972 struct btrfs_disk_key disk_key;
1973 btrfs_node_key(eb, &disk_key, nr);
1974 btrfs_disk_key_to_cpu(key, &disk_key);
1977 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1978 struct btrfs_key *key, int nr)
1980 struct btrfs_disk_key disk_key;
1981 btrfs_item_key(eb, &disk_key, nr);
1982 btrfs_disk_key_to_cpu(key, &disk_key);
1985 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1986 const struct btrfs_dir_item *item,
1987 struct btrfs_key *key)
1989 struct btrfs_disk_key disk_key;
1990 btrfs_dir_item_key(eb, item, &disk_key);
1991 btrfs_disk_key_to_cpu(key, &disk_key);
1996 /* struct btrfs_header */
1997 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1998 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2000 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2001 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2002 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2003 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2004 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2006 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2007 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2009 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2011 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2013 return (btrfs_header_flags(eb) & flag) == flag;
2016 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2018 u64 flags = btrfs_header_flags(eb);
2019 btrfs_set_header_flags(eb, flags | flag);
2022 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2024 u64 flags = btrfs_header_flags(eb);
2025 btrfs_set_header_flags(eb, flags & ~flag);
2028 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2030 u64 flags = btrfs_header_flags(eb);
2031 return flags >> BTRFS_BACKREF_REV_SHIFT;
2034 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2037 u64 flags = btrfs_header_flags(eb);
2038 flags &= ~BTRFS_BACKREF_REV_MASK;
2039 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2040 btrfs_set_header_flags(eb, flags);
2043 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2045 return btrfs_header_level(eb) == 0;
2048 /* struct btrfs_root_item */
2049 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2051 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2052 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2053 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2055 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2057 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2058 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2059 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2060 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2061 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2062 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2063 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2064 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2066 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2068 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2070 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2072 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2074 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2077 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2079 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2082 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2084 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2087 /* struct btrfs_root_backup */
2088 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2090 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2092 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2093 tree_root_level, 8);
2095 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2097 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2098 chunk_root_gen, 64);
2099 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2100 chunk_root_level, 8);
2102 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2104 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2105 extent_root_gen, 64);
2106 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2107 extent_root_level, 8);
2109 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2111 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2113 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2116 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2118 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2120 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2123 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2125 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2127 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2128 csum_root_level, 8);
2129 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2131 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2133 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2136 /* struct btrfs_balance_item */
2137 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2139 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2140 const struct btrfs_balance_item *bi,
2141 struct btrfs_disk_balance_args *ba)
2143 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2146 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2147 struct btrfs_balance_item *bi,
2148 const struct btrfs_disk_balance_args *ba)
2150 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2153 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2154 const struct btrfs_balance_item *bi,
2155 struct btrfs_disk_balance_args *ba)
2157 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2160 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2161 struct btrfs_balance_item *bi,
2162 const struct btrfs_disk_balance_args *ba)
2164 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2167 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2168 const struct btrfs_balance_item *bi,
2169 struct btrfs_disk_balance_args *ba)
2171 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2174 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2175 struct btrfs_balance_item *bi,
2176 const struct btrfs_disk_balance_args *ba)
2178 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2182 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2183 const struct btrfs_disk_balance_args *disk)
2185 memset(cpu, 0, sizeof(*cpu));
2187 cpu->profiles = le64_to_cpu(disk->profiles);
2188 cpu->usage = le64_to_cpu(disk->usage);
2189 cpu->devid = le64_to_cpu(disk->devid);
2190 cpu->pstart = le64_to_cpu(disk->pstart);
2191 cpu->pend = le64_to_cpu(disk->pend);
2192 cpu->vstart = le64_to_cpu(disk->vstart);
2193 cpu->vend = le64_to_cpu(disk->vend);
2194 cpu->target = le64_to_cpu(disk->target);
2195 cpu->flags = le64_to_cpu(disk->flags);
2196 cpu->limit = le64_to_cpu(disk->limit);
2197 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2198 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2202 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2203 const struct btrfs_balance_args *cpu)
2205 memset(disk, 0, sizeof(*disk));
2207 disk->profiles = cpu_to_le64(cpu->profiles);
2208 disk->usage = cpu_to_le64(cpu->usage);
2209 disk->devid = cpu_to_le64(cpu->devid);
2210 disk->pstart = cpu_to_le64(cpu->pstart);
2211 disk->pend = cpu_to_le64(cpu->pend);
2212 disk->vstart = cpu_to_le64(cpu->vstart);
2213 disk->vend = cpu_to_le64(cpu->vend);
2214 disk->target = cpu_to_le64(cpu->target);
2215 disk->flags = cpu_to_le64(cpu->flags);
2216 disk->limit = cpu_to_le64(cpu->limit);
2217 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2218 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2221 /* struct btrfs_super_block */
2222 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2223 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2224 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2226 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2227 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2228 struct btrfs_super_block, sys_chunk_array_size, 32);
2229 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2230 struct btrfs_super_block, chunk_root_generation, 64);
2231 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2233 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2235 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2236 chunk_root_level, 8);
2237 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2239 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2240 log_root_transid, 64);
2241 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2243 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2245 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2247 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2249 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2251 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2253 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2254 root_dir_objectid, 64);
2255 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2257 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2259 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2260 compat_ro_flags, 64);
2261 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2262 incompat_flags, 64);
2263 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2265 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2266 cache_generation, 64);
2267 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2268 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2269 uuid_tree_generation, 64);
2271 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2272 const char *btrfs_super_csum_name(u16 csum_type);
2273 const char *btrfs_super_csum_driver(u16 csum_type);
2274 size_t __attribute_const__ btrfs_get_num_csums(void);
2278 * The leaf data grows from end-to-front in the node.
2279 * this returns the address of the start of the last item,
2280 * which is the stop of the leaf data stack
2282 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2284 u32 nr = btrfs_header_nritems(leaf);
2287 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2288 return btrfs_item_offset_nr(leaf, nr - 1);
2291 /* struct btrfs_file_extent_item */
2292 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2294 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2295 struct btrfs_file_extent_item, disk_bytenr, 64);
2296 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2297 struct btrfs_file_extent_item, offset, 64);
2298 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2299 struct btrfs_file_extent_item, generation, 64);
2300 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2301 struct btrfs_file_extent_item, num_bytes, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2303 struct btrfs_file_extent_item, ram_bytes, 64);
2304 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2305 struct btrfs_file_extent_item, disk_num_bytes, 64);
2306 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2307 struct btrfs_file_extent_item, compression, 8);
2309 static inline unsigned long
2310 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2312 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2315 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2317 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2320 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2321 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2323 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2325 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2326 disk_num_bytes, 64);
2327 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2329 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2331 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2333 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2335 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2337 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2338 other_encoding, 16);
2341 * this returns the number of bytes used by the item on disk, minus the
2342 * size of any extent headers. If a file is compressed on disk, this is
2343 * the compressed size
2345 static inline u32 btrfs_file_extent_inline_item_len(
2346 const struct extent_buffer *eb,
2347 struct btrfs_item *e)
2349 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2352 /* btrfs_qgroup_status_item */
2353 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2355 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2357 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2359 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2362 /* btrfs_qgroup_info_item */
2363 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2365 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2366 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2368 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2369 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2372 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2373 struct btrfs_qgroup_info_item, generation, 64);
2374 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2376 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2377 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2378 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2380 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2381 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2383 /* btrfs_qgroup_limit_item */
2384 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2386 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2388 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2390 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2392 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2395 /* btrfs_dev_replace_item */
2396 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2397 struct btrfs_dev_replace_item, src_devid, 64);
2398 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2399 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2401 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2403 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2405 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2407 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2408 num_write_errors, 64);
2409 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2410 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2412 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2414 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2417 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2418 struct btrfs_dev_replace_item, src_devid, 64);
2419 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2420 struct btrfs_dev_replace_item,
2421 cont_reading_from_srcdev_mode, 64);
2422 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2423 struct btrfs_dev_replace_item, replace_state, 64);
2424 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2425 struct btrfs_dev_replace_item, time_started, 64);
2426 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2427 struct btrfs_dev_replace_item, time_stopped, 64);
2428 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2429 struct btrfs_dev_replace_item, num_write_errors, 64);
2430 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2431 struct btrfs_dev_replace_item,
2432 num_uncorrectable_read_errors, 64);
2433 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2434 struct btrfs_dev_replace_item, cursor_left, 64);
2435 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2436 struct btrfs_dev_replace_item, cursor_right, 64);
2438 /* helper function to cast into the data area of the leaf. */
2439 #define btrfs_item_ptr(leaf, slot, type) \
2440 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2441 btrfs_item_offset_nr(leaf, slot)))
2443 #define btrfs_item_ptr_offset(leaf, slot) \
2444 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2445 btrfs_item_offset_nr(leaf, slot)))
2447 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2449 return crc32c(crc, address, length);
2452 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2454 put_unaligned_le32(~crc, result);
2457 static inline u64 btrfs_name_hash(const char *name, int len)
2459 return crc32c((u32)~1, name, len);
2463 * Figure the key offset of an extended inode ref
2465 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2468 return (u64) crc32c(parent_objectid, name, len);
2471 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2473 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2478 enum btrfs_inline_ref_type {
2479 BTRFS_REF_TYPE_INVALID,
2480 BTRFS_REF_TYPE_BLOCK,
2481 BTRFS_REF_TYPE_DATA,
2485 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2486 struct btrfs_extent_inline_ref *iref,
2487 enum btrfs_inline_ref_type is_data);
2488 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2490 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2493 * Use this if we would be adding new items, as we could split nodes as we cow
2496 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2499 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2503 * Doing a truncate or a modification won't result in new nodes or leaves, just
2504 * what we need for COW.
2506 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2509 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2512 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2513 u64 start, u64 num_bytes);
2514 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2515 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2516 unsigned long count);
2517 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2518 struct btrfs_delayed_ref_root *delayed_refs,
2519 struct btrfs_delayed_ref_head *head);
2520 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2521 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2522 struct btrfs_fs_info *fs_info, u64 bytenr,
2523 u64 offset, int metadata, u64 *refs, u64 *flags);
2524 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2526 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2527 u64 bytenr, u64 num_bytes);
2528 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2529 int btrfs_cross_ref_exist(struct btrfs_root *root,
2530 u64 objectid, u64 offset, u64 bytenr, bool strict);
2531 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2532 struct btrfs_root *root,
2533 u64 parent, u64 root_objectid,
2534 const struct btrfs_disk_key *key,
2535 int level, u64 hint,
2537 enum btrfs_lock_nesting nest);
2538 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2539 struct btrfs_root *root,
2540 struct extent_buffer *buf,
2541 u64 parent, int last_ref);
2542 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2543 struct btrfs_root *root, u64 owner,
2544 u64 offset, u64 ram_bytes,
2545 struct btrfs_key *ins);
2546 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2547 u64 root_objectid, u64 owner, u64 offset,
2548 struct btrfs_key *ins);
2549 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2550 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2551 struct btrfs_key *ins, int is_data, int delalloc);
2552 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2553 struct extent_buffer *buf, int full_backref);
2554 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2555 struct extent_buffer *buf, int full_backref);
2556 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2557 struct extent_buffer *eb, u64 flags,
2558 int level, int is_data);
2559 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2561 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2562 u64 start, u64 len, int delalloc);
2563 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2565 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2566 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2567 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2568 struct btrfs_ref *generic_ref);
2570 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2571 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2574 * Different levels for to flush space when doing space reservations.
2576 * The higher the level, the more methods we try to reclaim space.
2578 enum btrfs_reserve_flush_enum {
2579 /* If we are in the transaction, we can't flush anything.*/
2580 BTRFS_RESERVE_NO_FLUSH,
2584 * - Running delayed inode items
2585 * - Allocating a new chunk
2587 BTRFS_RESERVE_FLUSH_LIMIT,
2591 * - Running delayed inode items
2592 * - Running delayed refs
2593 * - Running delalloc and waiting for ordered extents
2594 * - Allocating a new chunk
2596 BTRFS_RESERVE_FLUSH_EVICT,
2599 * Flush space by above mentioned methods and by:
2600 * - Running delayed iputs
2601 * - Commiting transaction
2603 * Can be interruped by fatal signal.
2605 BTRFS_RESERVE_FLUSH_DATA,
2606 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2607 BTRFS_RESERVE_FLUSH_ALL,
2610 * Pretty much the same as FLUSH_ALL, but can also steal space from
2613 * Can be interruped by fatal signal.
2615 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2618 enum btrfs_flush_state {
2619 FLUSH_DELAYED_ITEMS_NR = 1,
2620 FLUSH_DELAYED_ITEMS = 2,
2621 FLUSH_DELAYED_REFS_NR = 3,
2622 FLUSH_DELAYED_REFS = 4,
2624 FLUSH_DELALLOC_WAIT = 6,
2626 ALLOC_CHUNK_FORCE = 8,
2627 RUN_DELAYED_IPUTS = 9,
2631 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2632 struct btrfs_block_rsv *rsv,
2633 int nitems, bool use_global_rsv);
2634 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2635 struct btrfs_block_rsv *rsv);
2636 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2638 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2639 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2640 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2641 u64 start, u64 end);
2642 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2643 u64 num_bytes, u64 *actual_bytes);
2644 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2646 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2647 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2648 struct btrfs_fs_info *fs_info);
2649 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2650 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2651 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2654 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2656 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2657 int btrfs_previous_item(struct btrfs_root *root,
2658 struct btrfs_path *path, u64 min_objectid,
2660 int btrfs_previous_extent_item(struct btrfs_root *root,
2661 struct btrfs_path *path, u64 min_objectid);
2662 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2663 struct btrfs_path *path,
2664 const struct btrfs_key *new_key);
2665 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2666 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2667 struct btrfs_key *key, int lowest_level,
2669 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2670 struct btrfs_path *path,
2672 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2675 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2676 struct btrfs_root *root, struct extent_buffer *buf,
2677 struct extent_buffer *parent, int parent_slot,
2678 struct extent_buffer **cow_ret,
2679 enum btrfs_lock_nesting nest);
2680 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2681 struct btrfs_root *root,
2682 struct extent_buffer *buf,
2683 struct extent_buffer **cow_ret, u64 new_root_objectid);
2684 int btrfs_block_can_be_shared(struct btrfs_root *root,
2685 struct extent_buffer *buf);
2686 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2687 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2688 int btrfs_split_item(struct btrfs_trans_handle *trans,
2689 struct btrfs_root *root,
2690 struct btrfs_path *path,
2691 const struct btrfs_key *new_key,
2692 unsigned long split_offset);
2693 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2694 struct btrfs_root *root,
2695 struct btrfs_path *path,
2696 const struct btrfs_key *new_key);
2697 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2698 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2699 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2700 const struct btrfs_key *key, struct btrfs_path *p,
2701 int ins_len, int cow);
2702 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2703 struct btrfs_path *p, u64 time_seq);
2704 int btrfs_search_slot_for_read(struct btrfs_root *root,
2705 const struct btrfs_key *key,
2706 struct btrfs_path *p, int find_higher,
2708 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2709 struct btrfs_root *root, struct extent_buffer *parent,
2710 int start_slot, u64 *last_ret,
2711 struct btrfs_key *progress);
2712 void btrfs_release_path(struct btrfs_path *p);
2713 struct btrfs_path *btrfs_alloc_path(void);
2714 void btrfs_free_path(struct btrfs_path *p);
2716 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2717 struct btrfs_path *path, int slot, int nr);
2718 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2719 struct btrfs_root *root,
2720 struct btrfs_path *path)
2722 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2725 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2726 const struct btrfs_key *cpu_key, u32 *data_size,
2727 u32 total_data, u32 total_size, int nr);
2728 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2729 const struct btrfs_key *key, void *data, u32 data_size);
2730 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2731 struct btrfs_root *root,
2732 struct btrfs_path *path,
2733 const struct btrfs_key *cpu_key, u32 *data_size,
2736 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2737 struct btrfs_root *root,
2738 struct btrfs_path *path,
2739 const struct btrfs_key *key,
2742 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2745 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2746 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2747 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2749 static inline int btrfs_next_old_item(struct btrfs_root *root,
2750 struct btrfs_path *p, u64 time_seq)
2753 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2754 return btrfs_next_old_leaf(root, p, time_seq);
2757 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2759 return btrfs_next_old_item(root, p, 0);
2761 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2762 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2764 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2765 struct btrfs_root *root,
2766 struct extent_buffer *node,
2767 struct extent_buffer *parent);
2768 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2771 * Do it this way so we only ever do one test_bit in the normal case.
2773 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2774 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2782 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2783 * anything except sleeping. This function is used to check the status of
2786 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2788 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2791 /* tree mod log functions from ctree.c */
2792 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2793 struct seq_list *elem);
2794 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2795 struct seq_list *elem);
2796 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2799 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2800 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2802 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2803 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2805 int btrfs_del_root(struct btrfs_trans_handle *trans,
2806 const struct btrfs_key *key);
2807 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2808 const struct btrfs_key *key,
2809 struct btrfs_root_item *item);
2810 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2811 struct btrfs_root *root,
2812 struct btrfs_key *key,
2813 struct btrfs_root_item *item);
2814 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2815 struct btrfs_path *path, struct btrfs_root_item *root_item,
2816 struct btrfs_key *root_key);
2817 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2818 void btrfs_set_root_node(struct btrfs_root_item *item,
2819 struct extent_buffer *node);
2820 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2821 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2822 struct btrfs_root *root);
2825 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2827 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2829 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2832 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2833 const char *name, int name_len);
2834 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2835 int name_len, struct btrfs_inode *dir,
2836 struct btrfs_key *location, u8 type, u64 index);
2837 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2838 struct btrfs_root *root,
2839 struct btrfs_path *path, u64 dir,
2840 const char *name, int name_len,
2842 struct btrfs_dir_item *
2843 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2844 struct btrfs_root *root,
2845 struct btrfs_path *path, u64 dir,
2846 u64 objectid, const char *name, int name_len,
2848 struct btrfs_dir_item *
2849 btrfs_search_dir_index_item(struct btrfs_root *root,
2850 struct btrfs_path *path, u64 dirid,
2851 const char *name, int name_len);
2852 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2853 struct btrfs_root *root,
2854 struct btrfs_path *path,
2855 struct btrfs_dir_item *di);
2856 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2857 struct btrfs_root *root,
2858 struct btrfs_path *path, u64 objectid,
2859 const char *name, u16 name_len,
2860 const void *data, u16 data_len);
2861 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2862 struct btrfs_root *root,
2863 struct btrfs_path *path, u64 dir,
2864 const char *name, u16 name_len,
2866 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2867 struct btrfs_path *path,
2872 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2873 struct btrfs_root *root, u64 offset);
2874 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2875 struct btrfs_root *root, u64 offset);
2876 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2879 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2880 struct btrfs_root *root,
2881 const char *name, int name_len,
2882 u64 inode_objectid, u64 ref_objectid, u64 index);
2883 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2884 struct btrfs_root *root,
2885 const char *name, int name_len,
2886 u64 inode_objectid, u64 ref_objectid, u64 *index);
2887 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2888 struct btrfs_root *root,
2889 struct btrfs_path *path, u64 objectid);
2890 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2891 *root, struct btrfs_path *path,
2892 struct btrfs_key *location, int mod);
2894 struct btrfs_inode_extref *
2895 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2896 struct btrfs_root *root,
2897 struct btrfs_path *path,
2898 const char *name, int name_len,
2899 u64 inode_objectid, u64 ref_objectid, int ins_len,
2902 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2903 int slot, const char *name,
2905 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2906 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2907 const char *name, int name_len);
2909 struct btrfs_dio_private;
2910 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2911 struct btrfs_root *root, u64 bytenr, u64 len);
2912 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2913 u64 offset, u8 *dst);
2914 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2915 struct btrfs_root *root,
2916 u64 objectid, u64 pos,
2917 u64 disk_offset, u64 disk_num_bytes,
2918 u64 num_bytes, u64 offset, u64 ram_bytes,
2919 u8 compression, u8 encryption, u16 other_encoding);
2920 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2921 struct btrfs_root *root,
2922 struct btrfs_path *path, u64 objectid,
2923 u64 bytenr, int mod);
2924 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2925 struct btrfs_root *root,
2926 struct btrfs_ordered_sum *sums);
2927 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
2928 u64 file_start, int contig);
2929 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2930 struct list_head *list, int search_commit);
2931 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2932 const struct btrfs_path *path,
2933 struct btrfs_file_extent_item *fi,
2934 const bool new_inline,
2935 struct extent_map *em);
2936 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
2938 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
2940 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size);
2941 u64 btrfs_file_extent_end(const struct btrfs_path *path);
2944 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2945 u64 start, u64 len);
2946 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2947 u64 *orig_start, u64 *orig_block_len,
2948 u64 *ram_bytes, bool strict);
2950 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2951 struct btrfs_inode *inode);
2952 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2953 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2954 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2955 struct btrfs_root *root,
2956 struct btrfs_inode *dir, struct btrfs_inode *inode,
2957 const char *name, int name_len);
2958 int btrfs_add_link(struct btrfs_trans_handle *trans,
2959 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2960 const char *name, int name_len, int add_backref, u64 index);
2961 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2962 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2964 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2965 struct btrfs_root *root,
2966 struct inode *inode, u64 new_size,
2969 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2970 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr);
2971 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
2972 unsigned int extra_bits,
2973 struct extent_state **cached_state);
2974 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2975 struct btrfs_root *new_root,
2976 struct btrfs_root *parent_root,
2978 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2980 void btrfs_clear_delalloc_extent(struct inode *inode,
2981 struct extent_state *state, unsigned *bits);
2982 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2983 struct extent_state *other);
2984 void btrfs_split_delalloc_extent(struct inode *inode,
2985 struct extent_state *orig, u64 split);
2986 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2987 unsigned long bio_flags);
2988 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2989 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2990 int btrfs_readpage(struct file *file, struct page *page);
2991 void btrfs_evict_inode(struct inode *inode);
2992 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2993 struct inode *btrfs_alloc_inode(struct super_block *sb);
2994 void btrfs_destroy_inode(struct inode *inode);
2995 void btrfs_free_inode(struct inode *inode);
2996 int btrfs_drop_inode(struct inode *inode);
2997 int __init btrfs_init_cachep(void);
2998 void __cold btrfs_destroy_cachep(void);
2999 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3000 struct btrfs_root *root, struct btrfs_path *path);
3001 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3002 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3003 struct page *page, size_t pg_offset,
3004 u64 start, u64 end);
3005 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3006 struct btrfs_root *root,
3007 struct inode *inode);
3008 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3009 struct btrfs_root *root, struct inode *inode);
3010 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3011 struct btrfs_inode *inode);
3012 int btrfs_orphan_cleanup(struct btrfs_root *root);
3013 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3014 void btrfs_add_delayed_iput(struct inode *inode);
3015 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3016 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3017 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3018 u64 start, u64 num_bytes, u64 min_size,
3019 loff_t actual_len, u64 *alloc_hint);
3020 int btrfs_prealloc_file_range_trans(struct inode *inode,
3021 struct btrfs_trans_handle *trans, int mode,
3022 u64 start, u64 num_bytes, u64 min_size,
3023 loff_t actual_len, u64 *alloc_hint);
3024 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3025 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3026 struct writeback_control *wbc);
3027 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3028 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3029 u64 end, int uptodate);
3030 extern const struct dentry_operations btrfs_dentry_operations;
3031 ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter);
3034 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3035 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3036 int btrfs_ioctl_get_supported_features(void __user *arg);
3037 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3038 int __pure btrfs_is_empty_uuid(u8 *uuid);
3039 int btrfs_defrag_file(struct inode *inode, struct file *file,
3040 struct btrfs_ioctl_defrag_range_args *range,
3041 u64 newer_than, unsigned long max_pages);
3042 void btrfs_get_block_group_info(struct list_head *groups_list,
3043 struct btrfs_ioctl_space_info *space);
3044 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3045 struct btrfs_ioctl_balance_args *bargs);
3046 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3047 enum btrfs_exclusive_operation type);
3048 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3051 int __init btrfs_auto_defrag_init(void);
3052 void __cold btrfs_auto_defrag_exit(void);
3053 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3054 struct btrfs_inode *inode);
3055 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3056 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3057 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3058 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3060 extern const struct file_operations btrfs_file_operations;
3061 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3062 struct btrfs_root *root, struct btrfs_inode *inode,
3063 struct btrfs_path *path, u64 start, u64 end,
3064 u64 *drop_end, int drop_cache,
3066 u32 extent_item_size,
3068 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3069 struct btrfs_root *root, struct inode *inode, u64 start,
3070 u64 end, int drop_cache);
3071 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
3072 const u64 start, const u64 end,
3073 struct btrfs_clone_extent_info *clone_info,
3074 struct btrfs_trans_handle **trans_out);
3075 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3076 struct btrfs_inode *inode, u64 start, u64 end);
3077 int btrfs_release_file(struct inode *inode, struct file *file);
3078 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3079 size_t num_pages, loff_t pos, size_t write_bytes,
3080 struct extent_state **cached);
3081 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3082 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3083 size_t *write_bytes);
3084 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3087 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3088 struct btrfs_root *root);
3091 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3092 unsigned long new_flags);
3093 int btrfs_sync_fs(struct super_block *sb, int wait);
3094 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3095 u64 subvol_objectid);
3097 static inline __printf(2, 3) __cold
3098 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3102 #ifdef CONFIG_PRINTK
3105 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3107 #define btrfs_printk(fs_info, fmt, args...) \
3108 btrfs_no_printk(fs_info, fmt, ##args)
3111 #define btrfs_emerg(fs_info, fmt, args...) \
3112 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3113 #define btrfs_alert(fs_info, fmt, args...) \
3114 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3115 #define btrfs_crit(fs_info, fmt, args...) \
3116 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3117 #define btrfs_err(fs_info, fmt, args...) \
3118 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3119 #define btrfs_warn(fs_info, fmt, args...) \
3120 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3121 #define btrfs_notice(fs_info, fmt, args...) \
3122 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3123 #define btrfs_info(fs_info, fmt, args...) \
3124 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3127 * Wrappers that use printk_in_rcu
3129 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3130 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3131 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3132 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3133 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3134 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3135 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3136 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3137 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3138 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3139 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3140 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3141 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3142 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3145 * Wrappers that use a ratelimited printk_in_rcu
3147 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3148 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3149 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3150 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3151 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3152 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3153 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3154 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3155 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3156 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3157 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3158 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3159 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3160 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3163 * Wrappers that use a ratelimited printk
3165 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3166 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3167 #define btrfs_alert_rl(fs_info, fmt, args...) \
3168 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3169 #define btrfs_crit_rl(fs_info, fmt, args...) \
3170 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3171 #define btrfs_err_rl(fs_info, fmt, args...) \
3172 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3173 #define btrfs_warn_rl(fs_info, fmt, args...) \
3174 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3175 #define btrfs_notice_rl(fs_info, fmt, args...) \
3176 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3177 #define btrfs_info_rl(fs_info, fmt, args...) \
3178 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3180 #if defined(CONFIG_DYNAMIC_DEBUG)
3181 #define btrfs_debug(fs_info, fmt, args...) \
3182 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3183 fs_info, KERN_DEBUG fmt, ##args)
3184 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3185 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3186 fs_info, KERN_DEBUG fmt, ##args)
3187 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3188 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3189 fs_info, KERN_DEBUG fmt, ##args)
3190 #define btrfs_debug_rl(fs_info, fmt, args...) \
3191 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3192 fs_info, KERN_DEBUG fmt, ##args)
3193 #elif defined(DEBUG)
3194 #define btrfs_debug(fs_info, fmt, args...) \
3195 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3196 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3197 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3198 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3199 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3200 #define btrfs_debug_rl(fs_info, fmt, args...) \
3201 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3203 #define btrfs_debug(fs_info, fmt, args...) \
3204 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3205 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3206 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3207 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3208 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3209 #define btrfs_debug_rl(fs_info, fmt, args...) \
3210 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3213 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3216 btrfs_printk(fs_info, fmt, ##args); \
3217 rcu_read_unlock(); \
3220 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3223 btrfs_no_printk(fs_info, fmt, ##args); \
3224 rcu_read_unlock(); \
3227 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3229 static DEFINE_RATELIMIT_STATE(_rs, \
3230 DEFAULT_RATELIMIT_INTERVAL, \
3231 DEFAULT_RATELIMIT_BURST); \
3232 if (__ratelimit(&_rs)) \
3233 btrfs_printk(fs_info, fmt, ##args); \
3236 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3239 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3240 rcu_read_unlock(); \
3243 #ifdef CONFIG_BTRFS_ASSERT
3245 static inline void assertfail(const char *expr, const char *file, int line)
3247 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3251 #define ASSERT(expr) \
3252 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3255 static inline void assertfail(const char *expr, const char* file, int line) { }
3256 #define ASSERT(expr) (void)(expr)
3260 * Use that for functions that are conditionally exported for sanity tests but
3263 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3264 #define EXPORT_FOR_TESTS static
3266 #define EXPORT_FOR_TESTS
3270 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3273 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3278 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3279 unsigned int line, int errno, const char *fmt, ...);
3281 const char * __attribute_const__ btrfs_decode_error(int errno);
3284 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3285 const char *function,
3286 unsigned int line, int errno);
3289 * Call btrfs_abort_transaction as early as possible when an error condition is
3290 * detected, that way the exact line number is reported.
3292 #define btrfs_abort_transaction(trans, errno) \
3294 /* Report first abort since mount */ \
3295 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3296 &((trans)->fs_info->fs_state))) { \
3297 if ((errno) != -EIO && (errno) != -EROFS) { \
3298 WARN(1, KERN_DEBUG \
3299 "BTRFS: Transaction aborted (error %d)\n", \
3302 btrfs_debug((trans)->fs_info, \
3303 "Transaction aborted (error %d)", \
3307 __btrfs_abort_transaction((trans), __func__, \
3308 __LINE__, (errno)); \
3311 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3313 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3314 (errno), fmt, ##args); \
3319 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3320 unsigned int line, int errno, const char *fmt, ...);
3322 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3323 * will panic(). Otherwise we BUG() here.
3325 #define btrfs_panic(fs_info, errno, fmt, args...) \
3327 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3332 /* compatibility and incompatibility defines */
3334 #define btrfs_set_fs_incompat(__fs_info, opt) \
3335 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3338 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3339 u64 flag, const char* name)
3341 struct btrfs_super_block *disk_super;
3344 disk_super = fs_info->super_copy;
3345 features = btrfs_super_incompat_flags(disk_super);
3346 if (!(features & flag)) {
3347 spin_lock(&fs_info->super_lock);
3348 features = btrfs_super_incompat_flags(disk_super);
3349 if (!(features & flag)) {
3351 btrfs_set_super_incompat_flags(disk_super, features);
3353 "setting incompat feature flag for %s (0x%llx)",
3356 spin_unlock(&fs_info->super_lock);
3360 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3361 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3364 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3365 u64 flag, const char* name)
3367 struct btrfs_super_block *disk_super;
3370 disk_super = fs_info->super_copy;
3371 features = btrfs_super_incompat_flags(disk_super);
3372 if (features & flag) {
3373 spin_lock(&fs_info->super_lock);
3374 features = btrfs_super_incompat_flags(disk_super);
3375 if (features & flag) {
3377 btrfs_set_super_incompat_flags(disk_super, features);
3379 "clearing incompat feature flag for %s (0x%llx)",
3382 spin_unlock(&fs_info->super_lock);
3386 #define btrfs_fs_incompat(fs_info, opt) \
3387 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3389 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3391 struct btrfs_super_block *disk_super;
3392 disk_super = fs_info->super_copy;
3393 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3396 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3397 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3400 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3401 u64 flag, const char *name)
3403 struct btrfs_super_block *disk_super;
3406 disk_super = fs_info->super_copy;
3407 features = btrfs_super_compat_ro_flags(disk_super);
3408 if (!(features & flag)) {
3409 spin_lock(&fs_info->super_lock);
3410 features = btrfs_super_compat_ro_flags(disk_super);
3411 if (!(features & flag)) {
3413 btrfs_set_super_compat_ro_flags(disk_super, features);
3415 "setting compat-ro feature flag for %s (0x%llx)",
3418 spin_unlock(&fs_info->super_lock);
3422 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3423 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3426 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3427 u64 flag, const char *name)
3429 struct btrfs_super_block *disk_super;
3432 disk_super = fs_info->super_copy;
3433 features = btrfs_super_compat_ro_flags(disk_super);
3434 if (features & flag) {
3435 spin_lock(&fs_info->super_lock);
3436 features = btrfs_super_compat_ro_flags(disk_super);
3437 if (features & flag) {
3439 btrfs_set_super_compat_ro_flags(disk_super, features);
3441 "clearing compat-ro feature flag for %s (0x%llx)",
3444 spin_unlock(&fs_info->super_lock);
3448 #define btrfs_fs_compat_ro(fs_info, opt) \
3449 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3451 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3453 struct btrfs_super_block *disk_super;
3454 disk_super = fs_info->super_copy;
3455 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3459 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3460 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3461 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3462 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3463 struct inode *inode, struct inode *dir);
3465 #define btrfs_get_acl NULL
3466 #define btrfs_set_acl NULL
3467 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3468 struct inode *inode, struct inode *dir)
3475 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3476 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3477 struct btrfs_root *root);
3478 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3479 struct btrfs_root *root);
3480 int btrfs_recover_relocation(struct btrfs_root *root);
3481 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3482 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3483 struct btrfs_root *root, struct extent_buffer *buf,
3484 struct extent_buffer *cow);
3485 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3486 u64 *bytes_to_reserve);
3487 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3488 struct btrfs_pending_snapshot *pending);
3489 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3490 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3492 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3495 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3496 u64 end, struct btrfs_scrub_progress *progress,
3497 int readonly, int is_dev_replace);
3498 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3499 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3500 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3501 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3502 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3503 struct btrfs_scrub_progress *progress);
3504 static inline void btrfs_init_full_stripe_locks_tree(
3505 struct btrfs_full_stripe_locks_tree *locks_root)
3507 locks_root->root = RB_ROOT;
3508 mutex_init(&locks_root->lock);
3512 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3513 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3514 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3516 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3518 btrfs_bio_counter_sub(fs_info, 1);
3522 struct reada_control {
3523 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3524 struct btrfs_key key_start;
3525 struct btrfs_key key_end; /* exclusive */
3528 wait_queue_head_t wait;
3530 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3531 struct btrfs_key *start, struct btrfs_key *end);
3532 int btrfs_reada_wait(void *handle);
3533 void btrfs_reada_detach(void *handle);
3534 int btree_readahead_hook(struct extent_buffer *eb, int err);
3536 static inline int is_fstree(u64 rootid)
3538 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3539 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3540 !btrfs_qgroup_level(rootid)))
3545 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3547 return signal_pending(current);
3550 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3552 /* Sanity test specific functions */
3553 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3554 void btrfs_test_inode_set_ops(struct inode *inode);
3555 void btrfs_test_destroy_inode(struct inode *inode);
3557 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3559 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3562 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)