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"
37 struct btrfs_trans_handle;
38 struct btrfs_transaction;
39 struct btrfs_pending_snapshot;
40 struct btrfs_delayed_ref_root;
41 struct btrfs_space_info;
42 struct btrfs_block_group;
43 extern struct kmem_cache *btrfs_trans_handle_cachep;
44 extern struct kmem_cache *btrfs_bit_radix_cachep;
45 extern struct kmem_cache *btrfs_path_cachep;
46 extern struct kmem_cache *btrfs_free_space_cachep;
47 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
48 struct btrfs_ordered_sum;
51 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
54 * Maximum number of mirrors that can be available for all profiles counting
55 * the target device of dev-replace as one. During an active device replace
56 * procedure, the target device of the copy operation is a mirror for the
57 * filesystem data as well that can be used to read data in order to repair
58 * read errors on other disks.
60 * Current value is derived from RAID1C4 with 4 copies.
62 #define BTRFS_MAX_MIRRORS (4 + 1)
64 #define BTRFS_MAX_LEVEL 8
66 #define BTRFS_OLDEST_GENERATION 0ULL
69 * the max metadata block size. This limit is somewhat artificial,
70 * but the memmove costs go through the roof for larger blocks.
72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
75 * we can actually store much bigger names, but lets not confuse the rest
78 #define BTRFS_NAME_LEN 255
81 * Theoretical limit is larger, but we keep this down to a sane
82 * value. That should limit greatly the possibility of collisions on
85 #define BTRFS_LINK_MAX 65535U
87 #define BTRFS_EMPTY_DIR_SIZE 0
89 /* ioprio of readahead is set to idle */
90 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
92 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
95 * Use large batch size to reduce overhead of metadata updates. On the reader
96 * side, we only read it when we are close to ENOSPC and the read overhead is
97 * mostly related to the number of CPUs, so it is OK to use arbitrary large
100 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
106 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
108 static inline u32 count_max_extents(u64 size)
110 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
113 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
115 BUG_ON(num_stripes == 0);
116 return sizeof(struct btrfs_chunk) +
117 sizeof(struct btrfs_stripe) * (num_stripes - 1);
121 * Runtime (in-memory) states of filesystem
124 /* Global indicator of serious filesystem errors */
125 BTRFS_FS_STATE_ERROR,
127 * Filesystem is being remounted, allow to skip some operations, like
130 BTRFS_FS_STATE_REMOUNTING,
131 /* Track if a transaction abort has been reported on this filesystem */
132 BTRFS_FS_STATE_TRANS_ABORTED,
134 * Bio operations should be blocked on this filesystem because a source
135 * or target device is being destroyed as part of a device replace
137 BTRFS_FS_STATE_DEV_REPLACING,
138 /* The btrfs_fs_info created for self-tests */
139 BTRFS_FS_STATE_DUMMY_FS_INFO,
142 #define BTRFS_BACKREF_REV_MAX 256
143 #define BTRFS_BACKREF_REV_SHIFT 56
144 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
145 BTRFS_BACKREF_REV_SHIFT)
147 #define BTRFS_OLD_BACKREF_REV 0
148 #define BTRFS_MIXED_BACKREF_REV 1
151 * every tree block (leaf or node) starts with this header.
153 struct btrfs_header {
154 /* these first four must match the super block */
155 u8 csum[BTRFS_CSUM_SIZE];
156 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
157 __le64 bytenr; /* which block this node is supposed to live in */
160 /* allowed to be different from the super from here on down */
161 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
166 } __attribute__ ((__packed__));
169 * this is a very generous portion of the super block, giving us
170 * room to translate 14 chunks with 3 stripes each.
172 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
175 * just in case we somehow lose the roots and are not able to mount,
176 * we store an array of the roots from previous transactions
179 #define BTRFS_NUM_BACKUP_ROOTS 4
180 struct btrfs_root_backup {
182 __le64 tree_root_gen;
185 __le64 chunk_root_gen;
188 __le64 extent_root_gen;
197 __le64 csum_root_gen;
207 u8 extent_root_level;
211 /* future and to align */
213 } __attribute__ ((__packed__));
216 * the super block basically lists the main trees of the FS
217 * it currently lacks any block count etc etc
219 struct btrfs_super_block {
220 /* the first 4 fields must match struct btrfs_header */
221 u8 csum[BTRFS_CSUM_SIZE];
222 /* FS specific UUID, visible to user */
223 u8 fsid[BTRFS_FSID_SIZE];
224 __le64 bytenr; /* this block number */
227 /* allowed to be different from the btrfs_header from here own down */
234 /* this will help find the new super based on the log root */
235 __le64 log_root_transid;
238 __le64 root_dir_objectid;
242 __le32 __unused_leafsize;
244 __le32 sys_chunk_array_size;
245 __le64 chunk_root_generation;
247 __le64 compat_ro_flags;
248 __le64 incompat_flags;
253 struct btrfs_dev_item dev_item;
255 char label[BTRFS_LABEL_SIZE];
257 __le64 cache_generation;
258 __le64 uuid_tree_generation;
260 /* the UUID written into btree blocks */
261 u8 metadata_uuid[BTRFS_FSID_SIZE];
263 /* future expansion */
265 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
266 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
267 } __attribute__ ((__packed__));
270 * Compat flags that we support. If any incompat flags are set other than the
271 * ones specified below then we will fail to mount
273 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
274 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
275 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
277 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
278 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
279 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
281 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
282 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
284 #define BTRFS_FEATURE_INCOMPAT_SUPP \
285 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
286 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
287 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
288 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
289 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
290 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
291 BTRFS_FEATURE_INCOMPAT_RAID56 | \
292 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
293 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
294 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
295 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
296 BTRFS_FEATURE_INCOMPAT_RAID1C34)
298 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
299 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
300 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
303 * A leaf is full of items. offset and size tell us where to find
304 * the item in the leaf (relative to the start of the data area)
307 struct btrfs_disk_key key;
310 } __attribute__ ((__packed__));
313 * leaves have an item area and a data area:
314 * [item0, item1....itemN] [free space] [dataN...data1, data0]
316 * The data is separate from the items to get the keys closer together
320 struct btrfs_header header;
321 struct btrfs_item items[];
322 } __attribute__ ((__packed__));
325 * all non-leaf blocks are nodes, they hold only keys and pointers to
328 struct btrfs_key_ptr {
329 struct btrfs_disk_key key;
332 } __attribute__ ((__packed__));
335 struct btrfs_header header;
336 struct btrfs_key_ptr ptrs[];
337 } __attribute__ ((__packed__));
340 * btrfs_paths remember the path taken from the root down to the leaf.
341 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
342 * to any other levels that are present.
344 * The slots array records the index of the item or block pointer
345 * used while walking the tree.
347 enum { READA_NONE, READA_BACK, READA_FORWARD };
349 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
350 int slots[BTRFS_MAX_LEVEL];
351 /* if there is real range locking, this locks field will change */
352 u8 locks[BTRFS_MAX_LEVEL];
354 /* keep some upper locks as we walk down */
358 * set by btrfs_split_item, tells search_slot to keep all locks
359 * and to force calls to keep space in the nodes
361 unsigned int search_for_split:1;
362 unsigned int keep_locks:1;
363 unsigned int skip_locking:1;
364 unsigned int leave_spinning:1;
365 unsigned int search_commit_root:1;
366 unsigned int need_commit_sem:1;
367 unsigned int skip_release_on_error:1;
369 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
370 sizeof(struct btrfs_item))
371 struct btrfs_dev_replace {
372 u64 replace_state; /* see #define above */
373 time64_t time_started; /* seconds since 1-Jan-1970 */
374 time64_t time_stopped; /* seconds since 1-Jan-1970 */
375 atomic64_t num_write_errors;
376 atomic64_t num_uncorrectable_read_errors;
379 u64 committed_cursor_left;
380 u64 cursor_left_last_write_of_item;
383 u64 cont_reading_from_srcdev_mode; /* see #define above */
386 int item_needs_writeback;
387 struct btrfs_device *srcdev;
388 struct btrfs_device *tgtdev;
390 struct mutex lock_finishing_cancel_unmount;
391 struct rw_semaphore rwsem;
393 struct btrfs_scrub_progress scrub_progress;
395 struct percpu_counter bio_counter;
396 wait_queue_head_t replace_wait;
400 * free clusters are used to claim free space in relatively large chunks,
401 * allowing us to do less seeky writes. They are used for all metadata
402 * allocations. In ssd_spread mode they are also used for data allocations.
404 struct btrfs_free_cluster {
406 spinlock_t refill_lock;
409 /* largest extent in this cluster */
412 /* first extent starting offset */
415 /* We did a full search and couldn't create a cluster */
418 struct btrfs_block_group *block_group;
420 * when a cluster is allocated from a block group, we put the
421 * cluster onto a list in the block group so that it can
422 * be freed before the block group is freed.
424 struct list_head block_group_list;
427 enum btrfs_caching_type {
431 BTRFS_CACHE_FINISHED,
436 * Tree to record all locked full stripes of a RAID5/6 block group
438 struct btrfs_full_stripe_locks_tree {
443 /* Discard control. */
445 * Async discard uses multiple lists to differentiate the discard filter
448 #define BTRFS_NR_DISCARD_LISTS 1
450 struct btrfs_discard_ctl {
451 struct workqueue_struct *discard_workers;
452 struct delayed_work work;
454 struct btrfs_block_group *block_group;
455 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
458 /* delayed seq elem */
460 struct list_head list;
464 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
466 #define SEQ_LAST ((u64)-1)
468 enum btrfs_orphan_cleanup_state {
469 ORPHAN_CLEANUP_STARTED = 1,
470 ORPHAN_CLEANUP_DONE = 2,
473 void btrfs_init_async_reclaim_work(struct work_struct *work);
476 struct reloc_control;
478 struct btrfs_fs_devices;
479 struct btrfs_balance_control;
480 struct btrfs_delayed_root;
483 * Block group or device which contains an active swapfile. Used for preventing
484 * unsafe operations while a swapfile is active.
486 * These are sorted on (ptr, inode) (note that a block group or device can
487 * contain more than one swapfile). We compare the pointer values because we
488 * don't actually care what the object is, we just need a quick check whether
489 * the object exists in the rbtree.
491 struct btrfs_swapfile_pin {
496 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
497 * points to a struct btrfs_device.
502 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
506 BTRFS_FS_CLOSING_START,
507 BTRFS_FS_CLOSING_DONE,
508 BTRFS_FS_LOG_RECOVERING,
510 BTRFS_FS_QUOTA_ENABLED,
511 BTRFS_FS_UPDATE_UUID_TREE_GEN,
512 BTRFS_FS_CREATING_FREE_SPACE_TREE,
516 BTRFS_FS_QUOTA_OVERRIDE,
517 /* Used to record internally whether fs has been frozen */
520 * Indicate that a whole-filesystem exclusive operation is running
521 * (device replace, resize, device add/delete, balance)
525 * To info transaction_kthread we need an immediate commit so it
526 * doesn't need to wait for commit_interval
528 BTRFS_FS_NEED_ASYNC_COMMIT,
530 * Indicate that balance has been set up from the ioctl and is in the
531 * main phase. The fs_info::balance_ctl is initialized.
532 * Set and cleared while holding fs_info::balance_mutex.
534 BTRFS_FS_BALANCE_RUNNING,
536 /* Indicate that the cleaner thread is awake and doing something. */
537 BTRFS_FS_CLEANER_RUNNING,
540 * The checksumming has an optimized version and is considered fast,
541 * so we don't need to offload checksums to workqueues.
543 BTRFS_FS_CSUM_IMPL_FAST,
545 /* Indicate that the discard workqueue can service discards. */
546 BTRFS_FS_DISCARD_RUNNING,
549 struct btrfs_fs_info {
550 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
552 struct btrfs_root *extent_root;
553 struct btrfs_root *tree_root;
554 struct btrfs_root *chunk_root;
555 struct btrfs_root *dev_root;
556 struct btrfs_root *fs_root;
557 struct btrfs_root *csum_root;
558 struct btrfs_root *quota_root;
559 struct btrfs_root *uuid_root;
560 struct btrfs_root *free_space_root;
562 /* the log root tree is a directory of all the other log roots */
563 struct btrfs_root *log_root_tree;
565 spinlock_t fs_roots_radix_lock;
566 struct radix_tree_root fs_roots_radix;
568 /* block group cache stuff */
569 spinlock_t block_group_cache_lock;
570 u64 first_logical_byte;
571 struct rb_root block_group_cache_tree;
573 /* keep track of unallocated space */
574 atomic64_t free_chunk_space;
576 struct extent_io_tree freed_extents[2];
577 struct extent_io_tree *pinned_extents;
579 /* logical->physical extent mapping */
580 struct extent_map_tree mapping_tree;
583 * block reservation for extent, checksum, root tree and
584 * delayed dir index item
586 struct btrfs_block_rsv global_block_rsv;
587 /* block reservation for metadata operations */
588 struct btrfs_block_rsv trans_block_rsv;
589 /* block reservation for chunk tree */
590 struct btrfs_block_rsv chunk_block_rsv;
591 /* block reservation for delayed operations */
592 struct btrfs_block_rsv delayed_block_rsv;
593 /* block reservation for delayed refs */
594 struct btrfs_block_rsv delayed_refs_rsv;
596 struct btrfs_block_rsv empty_block_rsv;
599 u64 last_trans_committed;
600 u64 avg_delayed_ref_runtime;
603 * this is updated to the current trans every time a full commit
604 * is required instead of the faster short fsync log commits
606 u64 last_trans_log_full_commit;
607 unsigned long mount_opt;
609 * Track requests for actions that need to be done during transaction
610 * commit (like for some mount options).
612 unsigned long pending_changes;
613 unsigned long compress_type:4;
614 unsigned int compress_level;
617 * It is a suggestive number, the read side is safe even it gets a
618 * wrong number because we will write out the data into a regular
619 * extent. The write side(mount/remount) is under ->s_umount lock,
620 * so it is also safe.
624 struct btrfs_transaction *running_transaction;
625 wait_queue_head_t transaction_throttle;
626 wait_queue_head_t transaction_wait;
627 wait_queue_head_t transaction_blocked_wait;
628 wait_queue_head_t async_submit_wait;
631 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
632 * when they are updated.
634 * Because we do not clear the flags for ever, so we needn't use
635 * the lock on the read side.
637 * We also needn't use the lock when we mount the fs, because
638 * there is no other task which will update the flag.
640 spinlock_t super_lock;
641 struct btrfs_super_block *super_copy;
642 struct btrfs_super_block *super_for_commit;
643 struct super_block *sb;
644 struct inode *btree_inode;
645 struct mutex tree_log_mutex;
646 struct mutex transaction_kthread_mutex;
647 struct mutex cleaner_mutex;
648 struct mutex chunk_mutex;
651 * this is taken to make sure we don't set block groups ro after
652 * the free space cache has been allocated on them
654 struct mutex ro_block_group_mutex;
656 /* this is used during read/modify/write to make sure
657 * no two ios are trying to mod the same stripe at the same
660 struct btrfs_stripe_hash_table *stripe_hash_table;
663 * this protects the ordered operations list only while we are
664 * processing all of the entries on it. This way we make
665 * sure the commit code doesn't find the list temporarily empty
666 * because another function happens to be doing non-waiting preflush
667 * before jumping into the main commit.
669 struct mutex ordered_operations_mutex;
671 struct rw_semaphore commit_root_sem;
673 struct rw_semaphore cleanup_work_sem;
675 struct rw_semaphore subvol_sem;
676 struct srcu_struct subvol_srcu;
678 spinlock_t trans_lock;
680 * the reloc mutex goes with the trans lock, it is taken
681 * during commit to protect us from the relocation code
683 struct mutex reloc_mutex;
685 struct list_head trans_list;
686 struct list_head dead_roots;
687 struct list_head caching_block_groups;
689 spinlock_t delayed_iput_lock;
690 struct list_head delayed_iputs;
691 atomic_t nr_delayed_iputs;
692 wait_queue_head_t delayed_iputs_wait;
694 /* this protects tree_mod_seq_list */
695 spinlock_t tree_mod_seq_lock;
696 atomic64_t tree_mod_seq;
697 struct list_head tree_mod_seq_list;
699 /* this protects tree_mod_log */
700 rwlock_t tree_mod_log_lock;
701 struct rb_root tree_mod_log;
703 atomic_t async_delalloc_pages;
706 * this is used to protect the following list -- ordered_roots.
708 spinlock_t ordered_root_lock;
711 * all fs/file tree roots in which there are data=ordered extents
712 * pending writeback are added into this list.
714 * these can span multiple transactions and basically include
715 * every dirty data page that isn't from nodatacow
717 struct list_head ordered_roots;
719 struct mutex delalloc_root_mutex;
720 spinlock_t delalloc_root_lock;
721 /* all fs/file tree roots that have delalloc inodes. */
722 struct list_head delalloc_roots;
725 * there is a pool of worker threads for checksumming during writes
726 * and a pool for checksumming after reads. This is because readers
727 * can run with FS locks held, and the writers may be waiting for
728 * those locks. We don't want ordering in the pending list to cause
729 * deadlocks, and so the two are serviced separately.
731 * A third pool does submit_bio to avoid deadlocking with the other
734 struct btrfs_workqueue *workers;
735 struct btrfs_workqueue *delalloc_workers;
736 struct btrfs_workqueue *flush_workers;
737 struct btrfs_workqueue *endio_workers;
738 struct btrfs_workqueue *endio_meta_workers;
739 struct btrfs_workqueue *endio_raid56_workers;
740 struct btrfs_workqueue *endio_repair_workers;
741 struct btrfs_workqueue *rmw_workers;
742 struct btrfs_workqueue *endio_meta_write_workers;
743 struct btrfs_workqueue *endio_write_workers;
744 struct btrfs_workqueue *endio_freespace_worker;
745 struct btrfs_workqueue *caching_workers;
746 struct btrfs_workqueue *readahead_workers;
749 * fixup workers take dirty pages that didn't properly go through
750 * the cow mechanism and make them safe to write. It happens
751 * for the sys_munmap function call path
753 struct btrfs_workqueue *fixup_workers;
754 struct btrfs_workqueue *delayed_workers;
756 struct task_struct *transaction_kthread;
757 struct task_struct *cleaner_kthread;
758 u32 thread_pool_size;
760 struct kobject *space_info_kobj;
764 /* used to keep from writing metadata until there is a nice batch */
765 struct percpu_counter dirty_metadata_bytes;
766 struct percpu_counter delalloc_bytes;
767 struct percpu_counter dio_bytes;
768 s32 dirty_metadata_batch;
771 struct list_head dirty_cowonly_roots;
773 struct btrfs_fs_devices *fs_devices;
776 * The space_info list is effectively read only after initial
777 * setup. It is populated at mount time and cleaned up after
778 * all block groups are removed. RCU is used to protect it.
780 struct list_head space_info;
782 struct btrfs_space_info *data_sinfo;
784 struct reloc_control *reloc_ctl;
786 /* data_alloc_cluster is only used in ssd_spread mode */
787 struct btrfs_free_cluster data_alloc_cluster;
789 /* all metadata allocations go through this cluster */
790 struct btrfs_free_cluster meta_alloc_cluster;
792 /* auto defrag inodes go here */
793 spinlock_t defrag_inodes_lock;
794 struct rb_root defrag_inodes;
795 atomic_t defrag_running;
797 /* Used to protect avail_{data, metadata, system}_alloc_bits */
798 seqlock_t profiles_lock;
800 * these three are in extended format (availability of single
801 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
802 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
804 u64 avail_data_alloc_bits;
805 u64 avail_metadata_alloc_bits;
806 u64 avail_system_alloc_bits;
808 /* restriper state */
809 spinlock_t balance_lock;
810 struct mutex balance_mutex;
811 atomic_t balance_pause_req;
812 atomic_t balance_cancel_req;
813 struct btrfs_balance_control *balance_ctl;
814 wait_queue_head_t balance_wait_q;
816 u32 data_chunk_allocations;
821 /* private scrub information */
822 struct mutex scrub_lock;
823 atomic_t scrubs_running;
824 atomic_t scrub_pause_req;
825 atomic_t scrubs_paused;
826 atomic_t scrub_cancel_req;
827 wait_queue_head_t scrub_pause_wait;
829 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
832 refcount_t scrub_workers_refcnt;
833 struct btrfs_workqueue *scrub_workers;
834 struct btrfs_workqueue *scrub_wr_completion_workers;
835 struct btrfs_workqueue *scrub_parity_workers;
837 struct btrfs_discard_ctl discard_ctl;
839 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
840 u32 check_integrity_print_mask;
842 /* is qgroup tracking in a consistent state? */
845 /* holds configuration and tracking. Protected by qgroup_lock */
846 struct rb_root qgroup_tree;
847 spinlock_t qgroup_lock;
850 * used to avoid frequently calling ulist_alloc()/ulist_free()
851 * when doing qgroup accounting, it must be protected by qgroup_lock.
853 struct ulist *qgroup_ulist;
855 /* protect user change for quota operations */
856 struct mutex qgroup_ioctl_lock;
858 /* list of dirty qgroups to be written at next commit */
859 struct list_head dirty_qgroups;
861 /* used by qgroup for an efficient tree traversal */
864 /* qgroup rescan items */
865 struct mutex qgroup_rescan_lock; /* protects the progress item */
866 struct btrfs_key qgroup_rescan_progress;
867 struct btrfs_workqueue *qgroup_rescan_workers;
868 struct completion qgroup_rescan_completion;
869 struct btrfs_work qgroup_rescan_work;
870 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
872 /* filesystem state */
873 unsigned long fs_state;
875 struct btrfs_delayed_root *delayed_root;
878 spinlock_t reada_lock;
879 struct radix_tree_root reada_tree;
881 /* readahead works cnt */
882 atomic_t reada_works_cnt;
884 /* Extent buffer radix tree */
885 spinlock_t buffer_lock;
886 struct radix_tree_root buffer_radix;
888 /* next backup root to be overwritten */
889 int backup_root_index;
891 /* device replace state */
892 struct btrfs_dev_replace dev_replace;
894 struct semaphore uuid_tree_rescan_sem;
896 /* Used to reclaim the metadata space in the background. */
897 struct work_struct async_reclaim_work;
899 spinlock_t unused_bgs_lock;
900 struct list_head unused_bgs;
901 struct mutex unused_bg_unpin_mutex;
902 struct mutex delete_unused_bgs_mutex;
904 /* Cached block sizes */
909 /* Block groups and devices containing active swapfiles. */
910 spinlock_t swapfile_pins_lock;
911 struct rb_root swapfile_pins;
913 struct crypto_shash *csum_shash;
916 * Number of send operations in progress.
917 * Updated while holding fs_info::balance_mutex.
919 int send_in_progress;
921 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
922 spinlock_t ref_verify_lock;
923 struct rb_root block_tree;
927 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
929 return sb->s_fs_info;
932 struct btrfs_subvolume_writers {
933 struct percpu_counter counter;
934 wait_queue_head_t wait;
938 * The state of btrfs root
942 * btrfs_record_root_in_trans is a multi-step process, and it can race
943 * with the balancing code. But the race is very small, and only the
944 * first time the root is added to each transaction. So IN_TRANS_SETUP
945 * is used to tell us when more checks are required
947 BTRFS_ROOT_IN_TRANS_SETUP,
949 BTRFS_ROOT_TRACK_DIRTY,
951 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
952 BTRFS_ROOT_DEFRAG_RUNNING,
953 BTRFS_ROOT_FORCE_COW,
954 BTRFS_ROOT_MULTI_LOG_TASKS,
959 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
961 * Set for the subvolume tree owning the reloc tree.
963 BTRFS_ROOT_DEAD_RELOC_TREE,
964 /* Mark dead root stored on device whose cleanup needs to be resumed */
965 BTRFS_ROOT_DEAD_TREE,
969 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
970 * code. For detail check comment in fs/btrfs/qgroup.c.
972 struct btrfs_qgroup_swapped_blocks {
974 /* RM_EMPTY_ROOT() of above blocks[] */
976 struct rb_root blocks[BTRFS_MAX_LEVEL];
980 * in ram representation of the tree. extent_root is used for all allocations
981 * and for the extent tree extent_root root.
984 struct extent_buffer *node;
986 struct extent_buffer *commit_root;
987 struct btrfs_root *log_root;
988 struct btrfs_root *reloc_root;
991 struct btrfs_root_item root_item;
992 struct btrfs_key root_key;
993 struct btrfs_fs_info *fs_info;
994 struct extent_io_tree dirty_log_pages;
996 struct mutex objectid_mutex;
998 spinlock_t accounting_lock;
999 struct btrfs_block_rsv *block_rsv;
1001 /* free ino cache stuff */
1002 struct btrfs_free_space_ctl *free_ino_ctl;
1003 enum btrfs_caching_type ino_cache_state;
1004 spinlock_t ino_cache_lock;
1005 wait_queue_head_t ino_cache_wait;
1006 struct btrfs_free_space_ctl *free_ino_pinned;
1007 u64 ino_cache_progress;
1008 struct inode *ino_cache_inode;
1010 struct mutex log_mutex;
1011 wait_queue_head_t log_writer_wait;
1012 wait_queue_head_t log_commit_wait[2];
1013 struct list_head log_ctxs[2];
1014 atomic_t log_writers;
1015 atomic_t log_commit[2];
1018 /* No matter the commit succeeds or not*/
1019 int log_transid_committed;
1020 /* Just be updated when the commit succeeds. */
1021 int last_log_commit;
1022 pid_t log_start_pid;
1028 u64 highest_objectid;
1030 u64 defrag_trans_start;
1031 struct btrfs_key defrag_progress;
1032 struct btrfs_key defrag_max;
1034 /* the dirty list is only used by non-reference counted roots */
1035 struct list_head dirty_list;
1037 struct list_head root_list;
1039 spinlock_t log_extents_lock[2];
1040 struct list_head logged_list[2];
1042 int orphan_cleanup_state;
1044 spinlock_t inode_lock;
1045 /* red-black tree that keeps track of in-memory inodes */
1046 struct rb_root inode_tree;
1049 * radix tree that keeps track of delayed nodes of every inode,
1050 * protected by inode_lock
1052 struct radix_tree_root delayed_nodes_tree;
1054 * right now this just gets used so that a root has its own devid
1055 * for stat. It may be used for more later
1059 spinlock_t root_item_lock;
1062 struct mutex delalloc_mutex;
1063 spinlock_t delalloc_lock;
1065 * all of the inodes that have delalloc bytes. It is possible for
1066 * this list to be empty even when there is still dirty data=ordered
1067 * extents waiting to finish IO.
1069 struct list_head delalloc_inodes;
1070 struct list_head delalloc_root;
1071 u64 nr_delalloc_inodes;
1073 struct mutex ordered_extent_mutex;
1075 * this is used by the balancing code to wait for all the pending
1078 spinlock_t ordered_extent_lock;
1081 * all of the data=ordered extents pending writeback
1082 * these can span multiple transactions and basically include
1083 * every dirty data page that isn't from nodatacow
1085 struct list_head ordered_extents;
1086 struct list_head ordered_root;
1087 u64 nr_ordered_extents;
1090 * Not empty if this subvolume root has gone through tree block swap
1093 * Will be used by reloc_control::dirty_subvol_roots.
1095 struct list_head reloc_dirty_list;
1098 * Number of currently running SEND ioctls to prevent
1099 * manipulation with the read-only status via SUBVOL_SETFLAGS
1101 int send_in_progress;
1103 * Number of currently running deduplication operations that have a
1104 * destination inode belonging to this root. Protected by the lock
1107 int dedupe_in_progress;
1108 struct btrfs_subvolume_writers *subv_writers;
1109 atomic_t will_be_snapshotted;
1110 atomic_t snapshot_force_cow;
1112 /* For qgroup metadata reserved space */
1113 spinlock_t qgroup_meta_rsv_lock;
1114 u64 qgroup_meta_rsv_pertrans;
1115 u64 qgroup_meta_rsv_prealloc;
1117 /* Number of active swapfiles */
1118 atomic_t nr_swapfiles;
1120 /* Record pairs of swapped blocks for qgroup */
1121 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1123 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1128 struct btrfs_clone_extent_info {
1138 struct btrfs_file_private {
1142 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1144 return btrfs_sb(inode->i_sb)->sectorsize;
1147 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1150 return info->nodesize - sizeof(struct btrfs_header);
1153 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1155 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1157 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1160 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1162 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1165 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1166 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1167 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1169 return BTRFS_MAX_ITEM_SIZE(info) -
1170 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1173 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1175 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1179 * Flags for mount options.
1181 * Note: don't forget to add new options to btrfs_show_options()
1183 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1184 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1185 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1186 #define BTRFS_MOUNT_SSD (1 << 3)
1187 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1188 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1189 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1190 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1191 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1192 #define BTRFS_MOUNT_NOSSD (1 << 9)
1193 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1194 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1195 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1196 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1197 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1198 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1199 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1200 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1201 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1202 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1203 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1204 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1205 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1206 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1207 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1208 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1209 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1210 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1211 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1212 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1214 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1215 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1217 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1218 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1219 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1220 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1223 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1225 if (!btrfs_test_opt(fs_info, opt)) \
1226 btrfs_info(fs_info, fmt, ##args); \
1227 btrfs_set_opt(fs_info->mount_opt, opt); \
1230 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1232 if (btrfs_test_opt(fs_info, opt)) \
1233 btrfs_info(fs_info, fmt, ##args); \
1234 btrfs_clear_opt(fs_info->mount_opt, opt); \
1238 * Requests for changes that need to be done during transaction commit.
1240 * Internal mount options that are used for special handling of the real
1241 * mount options (eg. cannot be set during remount and have to be set during
1242 * transaction commit)
1245 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1246 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1247 #define BTRFS_PENDING_COMMIT (2)
1249 #define btrfs_test_pending(info, opt) \
1250 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1251 #define btrfs_set_pending(info, opt) \
1252 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1253 #define btrfs_clear_pending(info, opt) \
1254 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1257 * Helpers for setting pending mount option changes.
1259 * Expects corresponding macros
1260 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1262 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1264 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1265 btrfs_info((info), fmt, ##args); \
1266 btrfs_set_pending((info), SET_##opt); \
1267 btrfs_clear_pending((info), CLEAR_##opt); \
1271 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1273 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1274 btrfs_info((info), fmt, ##args); \
1275 btrfs_set_pending((info), CLEAR_##opt); \
1276 btrfs_clear_pending((info), SET_##opt); \
1283 #define BTRFS_INODE_NODATASUM (1 << 0)
1284 #define BTRFS_INODE_NODATACOW (1 << 1)
1285 #define BTRFS_INODE_READONLY (1 << 2)
1286 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1287 #define BTRFS_INODE_PREALLOC (1 << 4)
1288 #define BTRFS_INODE_SYNC (1 << 5)
1289 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1290 #define BTRFS_INODE_APPEND (1 << 7)
1291 #define BTRFS_INODE_NODUMP (1 << 8)
1292 #define BTRFS_INODE_NOATIME (1 << 9)
1293 #define BTRFS_INODE_DIRSYNC (1 << 10)
1294 #define BTRFS_INODE_COMPRESS (1 << 11)
1296 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1298 #define BTRFS_INODE_FLAG_MASK \
1299 (BTRFS_INODE_NODATASUM | \
1300 BTRFS_INODE_NODATACOW | \
1301 BTRFS_INODE_READONLY | \
1302 BTRFS_INODE_NOCOMPRESS | \
1303 BTRFS_INODE_PREALLOC | \
1304 BTRFS_INODE_SYNC | \
1305 BTRFS_INODE_IMMUTABLE | \
1306 BTRFS_INODE_APPEND | \
1307 BTRFS_INODE_NODUMP | \
1308 BTRFS_INODE_NOATIME | \
1309 BTRFS_INODE_DIRSYNC | \
1310 BTRFS_INODE_COMPRESS | \
1311 BTRFS_INODE_ROOT_ITEM_INIT)
1313 struct btrfs_map_token {
1314 const struct extent_buffer *eb;
1316 unsigned long offset;
1319 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1320 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1322 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1323 struct extent_buffer *eb)
1326 token->kaddr = NULL;
1329 /* some macros to generate set/get functions for the struct fields. This
1330 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1333 #define le8_to_cpu(v) (v)
1334 #define cpu_to_le8(v) (v)
1337 #define read_eb_member(eb, ptr, type, member, result) (\
1338 read_extent_buffer(eb, (char *)(result), \
1339 ((unsigned long)(ptr)) + \
1340 offsetof(type, member), \
1341 sizeof(((type *)0)->member)))
1343 #define write_eb_member(eb, ptr, type, member, result) (\
1344 write_extent_buffer(eb, (char *)(result), \
1345 ((unsigned long)(ptr)) + \
1346 offsetof(type, member), \
1347 sizeof(((type *)0)->member)))
1349 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1350 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1351 const void *ptr, unsigned long off, \
1352 struct btrfs_map_token *token); \
1353 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1354 unsigned long off, u##bits val, \
1355 struct btrfs_map_token *token); \
1356 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1357 const void *ptr, unsigned long off); \
1358 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1359 unsigned long off, u##bits val);
1361 DECLARE_BTRFS_SETGET_BITS(8)
1362 DECLARE_BTRFS_SETGET_BITS(16)
1363 DECLARE_BTRFS_SETGET_BITS(32)
1364 DECLARE_BTRFS_SETGET_BITS(64)
1366 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1367 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1370 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1371 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1373 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1376 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1377 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1379 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1381 struct btrfs_map_token *token) \
1383 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1384 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1386 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1387 type *s, u##bits val, \
1388 struct btrfs_map_token *token) \
1390 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1391 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1394 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1395 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1397 const type *p = page_address(eb->pages[0]); \
1398 u##bits res = le##bits##_to_cpu(p->member); \
1401 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1404 type *p = page_address(eb->pages[0]); \
1405 p->member = cpu_to_le##bits(val); \
1408 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1409 static inline u##bits btrfs_##name(const type *s) \
1411 return le##bits##_to_cpu(s->member); \
1413 static inline void btrfs_set_##name(type *s, u##bits val) \
1415 s->member = cpu_to_le##bits(val); \
1419 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1420 struct btrfs_dev_item *s)
1422 BUILD_BUG_ON(sizeof(u64) !=
1423 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1424 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1427 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1428 struct btrfs_dev_item *s,
1431 BUILD_BUG_ON(sizeof(u64) !=
1432 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1433 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1434 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1438 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1439 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1440 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1441 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1442 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1444 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1445 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1446 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1447 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1448 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1449 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1451 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1452 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1454 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1456 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1458 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1460 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1462 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1465 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1467 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1469 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1472 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1474 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1477 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1479 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1482 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1483 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1484 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1485 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1486 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1487 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1488 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1489 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1490 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1491 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1492 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1494 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1496 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1499 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1500 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1501 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1503 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1505 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1507 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1509 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1512 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1514 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1515 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1517 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1520 unsigned long offset = (unsigned long)c;
1521 offset += offsetof(struct btrfs_chunk, stripe);
1522 offset += nr * sizeof(struct btrfs_stripe);
1523 return (struct btrfs_stripe *)offset;
1526 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1528 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1531 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1532 struct btrfs_chunk *c, int nr)
1534 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1537 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1538 struct btrfs_chunk *c, int nr)
1540 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1543 /* struct btrfs_block_group_item */
1544 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1546 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1548 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1549 struct btrfs_block_group_item, chunk_objectid, 64);
1551 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1552 struct btrfs_block_group_item, chunk_objectid, 64);
1553 BTRFS_SETGET_FUNCS(block_group_flags,
1554 struct btrfs_block_group_item, flags, 64);
1555 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1556 struct btrfs_block_group_item, flags, 64);
1558 /* struct btrfs_free_space_info */
1559 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1561 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1563 /* struct btrfs_inode_ref */
1564 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1565 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1567 /* struct btrfs_inode_extref */
1568 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1569 parent_objectid, 64);
1570 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1572 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1574 /* struct btrfs_inode_item */
1575 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1576 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1577 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1578 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1579 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1580 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1581 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1582 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1583 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1584 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1585 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1586 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1587 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1589 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1591 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1593 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1594 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1596 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1598 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1599 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1600 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1601 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1602 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1603 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1604 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1605 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1606 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1607 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1609 /* struct btrfs_dev_extent */
1610 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1612 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1613 chunk_objectid, 64);
1614 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1616 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1618 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1620 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1621 return (unsigned long)dev + ptr;
1624 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1625 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1627 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1629 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1632 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1634 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1635 struct btrfs_tree_block_info *item,
1636 struct btrfs_disk_key *key)
1638 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1641 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1642 struct btrfs_tree_block_info *item,
1643 struct btrfs_disk_key *key)
1645 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1648 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1650 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1652 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1654 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1657 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1660 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1662 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1665 static inline u32 btrfs_extent_inline_ref_size(int type)
1667 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1668 type == BTRFS_SHARED_BLOCK_REF_KEY)
1669 return sizeof(struct btrfs_extent_inline_ref);
1670 if (type == BTRFS_SHARED_DATA_REF_KEY)
1671 return sizeof(struct btrfs_shared_data_ref) +
1672 sizeof(struct btrfs_extent_inline_ref);
1673 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1674 return sizeof(struct btrfs_extent_data_ref) +
1675 offsetof(struct btrfs_extent_inline_ref, offset);
1679 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1680 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1682 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1683 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1685 /* struct btrfs_node */
1686 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1687 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1688 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1690 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1693 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1696 ptr = offsetof(struct btrfs_node, ptrs) +
1697 sizeof(struct btrfs_key_ptr) * nr;
1698 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1701 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1705 ptr = offsetof(struct btrfs_node, ptrs) +
1706 sizeof(struct btrfs_key_ptr) * nr;
1707 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1710 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1713 ptr = offsetof(struct btrfs_node, ptrs) +
1714 sizeof(struct btrfs_key_ptr) * nr;
1715 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1718 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1722 ptr = offsetof(struct btrfs_node, ptrs) +
1723 sizeof(struct btrfs_key_ptr) * nr;
1724 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1727 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1729 return offsetof(struct btrfs_node, ptrs) +
1730 sizeof(struct btrfs_key_ptr) * nr;
1733 void btrfs_node_key(const struct extent_buffer *eb,
1734 struct btrfs_disk_key *disk_key, int nr);
1736 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1737 struct btrfs_disk_key *disk_key, int nr)
1740 ptr = btrfs_node_key_ptr_offset(nr);
1741 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1742 struct btrfs_key_ptr, key, disk_key);
1745 /* struct btrfs_item */
1746 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1747 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1748 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1749 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1751 static inline unsigned long btrfs_item_nr_offset(int nr)
1753 return offsetof(struct btrfs_leaf, items) +
1754 sizeof(struct btrfs_item) * nr;
1757 static inline struct btrfs_item *btrfs_item_nr(int nr)
1759 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1762 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1763 struct btrfs_item *item)
1765 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1768 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1770 return btrfs_item_end(eb, btrfs_item_nr(nr));
1773 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1775 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1778 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1780 return btrfs_item_size(eb, btrfs_item_nr(nr));
1783 static inline void btrfs_item_key(const struct extent_buffer *eb,
1784 struct btrfs_disk_key *disk_key, int nr)
1786 struct btrfs_item *item = btrfs_item_nr(nr);
1787 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1790 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1791 struct btrfs_disk_key *disk_key, int nr)
1793 struct btrfs_item *item = btrfs_item_nr(nr);
1794 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1797 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1800 * struct btrfs_root_ref
1802 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1803 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1804 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1806 /* struct btrfs_dir_item */
1807 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1808 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1809 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1810 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1811 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1812 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1814 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1816 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1819 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1820 const struct btrfs_dir_item *item,
1821 struct btrfs_disk_key *key)
1823 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1826 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1827 struct btrfs_dir_item *item,
1828 const struct btrfs_disk_key *key)
1830 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1833 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1835 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1837 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1840 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1841 const struct btrfs_free_space_header *h,
1842 struct btrfs_disk_key *key)
1844 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1847 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1848 struct btrfs_free_space_header *h,
1849 const struct btrfs_disk_key *key)
1851 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1854 /* struct btrfs_disk_key */
1855 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1857 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1858 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1860 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1861 const struct btrfs_disk_key *disk)
1863 cpu->offset = le64_to_cpu(disk->offset);
1864 cpu->type = disk->type;
1865 cpu->objectid = le64_to_cpu(disk->objectid);
1868 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1869 const struct btrfs_key *cpu)
1871 disk->offset = cpu_to_le64(cpu->offset);
1872 disk->type = cpu->type;
1873 disk->objectid = cpu_to_le64(cpu->objectid);
1876 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1877 struct btrfs_key *key, int nr)
1879 struct btrfs_disk_key disk_key;
1880 btrfs_node_key(eb, &disk_key, nr);
1881 btrfs_disk_key_to_cpu(key, &disk_key);
1884 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1885 struct btrfs_key *key, int nr)
1887 struct btrfs_disk_key disk_key;
1888 btrfs_item_key(eb, &disk_key, nr);
1889 btrfs_disk_key_to_cpu(key, &disk_key);
1892 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1893 const struct btrfs_dir_item *item,
1894 struct btrfs_key *key)
1896 struct btrfs_disk_key disk_key;
1897 btrfs_dir_item_key(eb, item, &disk_key);
1898 btrfs_disk_key_to_cpu(key, &disk_key);
1901 /* struct btrfs_header */
1902 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1903 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1905 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1906 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1907 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1908 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1909 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1911 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1912 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1914 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1916 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1918 return (btrfs_header_flags(eb) & flag) == flag;
1921 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1923 u64 flags = btrfs_header_flags(eb);
1924 btrfs_set_header_flags(eb, flags | flag);
1927 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1929 u64 flags = btrfs_header_flags(eb);
1930 btrfs_set_header_flags(eb, flags & ~flag);
1933 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1935 u64 flags = btrfs_header_flags(eb);
1936 return flags >> BTRFS_BACKREF_REV_SHIFT;
1939 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1942 u64 flags = btrfs_header_flags(eb);
1943 flags &= ~BTRFS_BACKREF_REV_MASK;
1944 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1945 btrfs_set_header_flags(eb, flags);
1948 static inline unsigned long btrfs_header_fsid(void)
1950 return offsetof(struct btrfs_header, fsid);
1953 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
1955 return offsetof(struct btrfs_header, chunk_tree_uuid);
1958 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1960 return btrfs_header_level(eb) == 0;
1963 /* struct btrfs_root_item */
1964 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1966 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1967 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1968 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1970 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1972 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1973 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1974 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1975 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1976 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1977 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1978 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1979 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1981 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1983 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1985 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1987 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1989 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1992 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
1994 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
1997 static inline bool btrfs_root_dead(const struct btrfs_root *root)
1999 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2002 /* struct btrfs_root_backup */
2003 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2005 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2007 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2008 tree_root_level, 8);
2010 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2012 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2013 chunk_root_gen, 64);
2014 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2015 chunk_root_level, 8);
2017 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2019 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2020 extent_root_gen, 64);
2021 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2022 extent_root_level, 8);
2024 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2026 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2028 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2031 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2033 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2035 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2038 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2040 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2042 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2043 csum_root_level, 8);
2044 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2046 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2048 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2051 /* struct btrfs_balance_item */
2052 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2054 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2055 const struct btrfs_balance_item *bi,
2056 struct btrfs_disk_balance_args *ba)
2058 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2061 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2062 struct btrfs_balance_item *bi,
2063 const struct btrfs_disk_balance_args *ba)
2065 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2068 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2069 const struct btrfs_balance_item *bi,
2070 struct btrfs_disk_balance_args *ba)
2072 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2075 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2076 struct btrfs_balance_item *bi,
2077 const struct btrfs_disk_balance_args *ba)
2079 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2082 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2083 const struct btrfs_balance_item *bi,
2084 struct btrfs_disk_balance_args *ba)
2086 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2089 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2090 struct btrfs_balance_item *bi,
2091 const struct btrfs_disk_balance_args *ba)
2093 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2097 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2098 const struct btrfs_disk_balance_args *disk)
2100 memset(cpu, 0, sizeof(*cpu));
2102 cpu->profiles = le64_to_cpu(disk->profiles);
2103 cpu->usage = le64_to_cpu(disk->usage);
2104 cpu->devid = le64_to_cpu(disk->devid);
2105 cpu->pstart = le64_to_cpu(disk->pstart);
2106 cpu->pend = le64_to_cpu(disk->pend);
2107 cpu->vstart = le64_to_cpu(disk->vstart);
2108 cpu->vend = le64_to_cpu(disk->vend);
2109 cpu->target = le64_to_cpu(disk->target);
2110 cpu->flags = le64_to_cpu(disk->flags);
2111 cpu->limit = le64_to_cpu(disk->limit);
2112 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2113 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2117 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2118 const struct btrfs_balance_args *cpu)
2120 memset(disk, 0, sizeof(*disk));
2122 disk->profiles = cpu_to_le64(cpu->profiles);
2123 disk->usage = cpu_to_le64(cpu->usage);
2124 disk->devid = cpu_to_le64(cpu->devid);
2125 disk->pstart = cpu_to_le64(cpu->pstart);
2126 disk->pend = cpu_to_le64(cpu->pend);
2127 disk->vstart = cpu_to_le64(cpu->vstart);
2128 disk->vend = cpu_to_le64(cpu->vend);
2129 disk->target = cpu_to_le64(cpu->target);
2130 disk->flags = cpu_to_le64(cpu->flags);
2131 disk->limit = cpu_to_le64(cpu->limit);
2132 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2133 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2136 /* struct btrfs_super_block */
2137 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2138 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2139 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2141 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2142 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2143 struct btrfs_super_block, sys_chunk_array_size, 32);
2144 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2145 struct btrfs_super_block, chunk_root_generation, 64);
2146 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2148 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2150 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2151 chunk_root_level, 8);
2152 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2154 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2155 log_root_transid, 64);
2156 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2158 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2160 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2162 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2164 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2166 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2168 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2169 root_dir_objectid, 64);
2170 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2172 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2174 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2175 compat_ro_flags, 64);
2176 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2177 incompat_flags, 64);
2178 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2180 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2181 cache_generation, 64);
2182 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2183 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2184 uuid_tree_generation, 64);
2186 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2187 const char *btrfs_super_csum_name(u16 csum_type);
2188 const char *btrfs_super_csum_driver(u16 csum_type);
2189 size_t __const btrfs_get_num_csums(void);
2193 * The leaf data grows from end-to-front in the node.
2194 * this returns the address of the start of the last item,
2195 * which is the stop of the leaf data stack
2197 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2199 u32 nr = btrfs_header_nritems(leaf);
2202 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2203 return btrfs_item_offset_nr(leaf, nr - 1);
2206 /* struct btrfs_file_extent_item */
2207 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2208 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2209 struct btrfs_file_extent_item, disk_bytenr, 64);
2210 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2211 struct btrfs_file_extent_item, offset, 64);
2212 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2213 struct btrfs_file_extent_item, generation, 64);
2214 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2215 struct btrfs_file_extent_item, num_bytes, 64);
2216 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2217 struct btrfs_file_extent_item, disk_num_bytes, 64);
2218 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2219 struct btrfs_file_extent_item, compression, 8);
2221 static inline unsigned long
2222 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2224 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2227 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2229 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2232 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2234 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2236 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2237 disk_num_bytes, 64);
2238 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2240 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2242 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2244 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2246 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2248 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2249 other_encoding, 16);
2252 * this returns the number of bytes used by the item on disk, minus the
2253 * size of any extent headers. If a file is compressed on disk, this is
2254 * the compressed size
2256 static inline u32 btrfs_file_extent_inline_item_len(
2257 const struct extent_buffer *eb,
2258 struct btrfs_item *e)
2260 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2263 /* btrfs_qgroup_status_item */
2264 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2266 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2268 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2270 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2273 /* btrfs_qgroup_info_item */
2274 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2276 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2277 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2279 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2280 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2283 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2284 struct btrfs_qgroup_info_item, generation, 64);
2285 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2287 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2288 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2289 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2291 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2292 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2294 /* btrfs_qgroup_limit_item */
2295 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2297 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2299 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2301 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2303 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2306 /* btrfs_dev_replace_item */
2307 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2308 struct btrfs_dev_replace_item, src_devid, 64);
2309 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2310 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2312 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2314 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2316 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2318 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2319 num_write_errors, 64);
2320 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2321 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2323 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2325 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2328 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2329 struct btrfs_dev_replace_item, src_devid, 64);
2330 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2331 struct btrfs_dev_replace_item,
2332 cont_reading_from_srcdev_mode, 64);
2333 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2334 struct btrfs_dev_replace_item, replace_state, 64);
2335 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2336 struct btrfs_dev_replace_item, time_started, 64);
2337 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2338 struct btrfs_dev_replace_item, time_stopped, 64);
2339 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2340 struct btrfs_dev_replace_item, num_write_errors, 64);
2341 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2342 struct btrfs_dev_replace_item,
2343 num_uncorrectable_read_errors, 64);
2344 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2345 struct btrfs_dev_replace_item, cursor_left, 64);
2346 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2347 struct btrfs_dev_replace_item, cursor_right, 64);
2349 /* helper function to cast into the data area of the leaf. */
2350 #define btrfs_item_ptr(leaf, slot, type) \
2351 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2352 btrfs_item_offset_nr(leaf, slot)))
2354 #define btrfs_item_ptr_offset(leaf, slot) \
2355 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2356 btrfs_item_offset_nr(leaf, slot)))
2358 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2360 return crc32c(crc, address, length);
2363 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2365 put_unaligned_le32(~crc, result);
2368 static inline u64 btrfs_name_hash(const char *name, int len)
2370 return crc32c((u32)~1, name, len);
2374 * Figure the key offset of an extended inode ref
2376 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2379 return (u64) crc32c(parent_objectid, name, len);
2382 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2384 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2389 enum btrfs_inline_ref_type {
2390 BTRFS_REF_TYPE_INVALID,
2391 BTRFS_REF_TYPE_BLOCK,
2392 BTRFS_REF_TYPE_DATA,
2396 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2397 struct btrfs_extent_inline_ref *iref,
2398 enum btrfs_inline_ref_type is_data);
2399 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2401 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2404 * Use this if we would be adding new items, as we could split nodes as we cow
2407 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2410 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2414 * Doing a truncate or a modification won't result in new nodes or leaves, just
2415 * what we need for COW.
2417 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2420 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2423 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2424 u64 start, u64 num_bytes);
2425 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2426 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2427 unsigned long count);
2428 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2429 struct btrfs_delayed_ref_root *delayed_refs,
2430 struct btrfs_delayed_ref_head *head);
2431 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2432 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2433 struct btrfs_fs_info *fs_info, u64 bytenr,
2434 u64 offset, int metadata, u64 *refs, u64 *flags);
2435 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2436 u64 bytenr, u64 num, int reserved);
2437 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2438 u64 bytenr, u64 num_bytes);
2439 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2440 int btrfs_cross_ref_exist(struct btrfs_root *root,
2441 u64 objectid, u64 offset, u64 bytenr);
2442 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root,
2444 u64 parent, u64 root_objectid,
2445 const struct btrfs_disk_key *key,
2446 int level, u64 hint,
2448 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2449 struct btrfs_root *root,
2450 struct extent_buffer *buf,
2451 u64 parent, int last_ref);
2452 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2453 struct btrfs_root *root, u64 owner,
2454 u64 offset, u64 ram_bytes,
2455 struct btrfs_key *ins);
2456 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2457 u64 root_objectid, u64 owner, u64 offset,
2458 struct btrfs_key *ins);
2459 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2460 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2461 struct btrfs_key *ins, int is_data, int delalloc);
2462 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2463 struct extent_buffer *buf, int full_backref);
2464 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2465 struct extent_buffer *buf, int full_backref);
2466 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2467 u64 bytenr, u64 num_bytes, u64 flags,
2468 int level, int is_data);
2469 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2471 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2472 u64 start, u64 len, int delalloc);
2473 int btrfs_pin_reserved_extent(struct btrfs_fs_info *fs_info, u64 start,
2475 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2476 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2477 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2478 struct btrfs_ref *generic_ref);
2480 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2481 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache);
2482 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache);
2483 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2485 enum btrfs_reserve_flush_enum {
2486 /* If we are in the transaction, we can't flush anything.*/
2487 BTRFS_RESERVE_NO_FLUSH,
2489 * Flushing delalloc may cause deadlock somewhere, in this
2490 * case, use FLUSH LIMIT
2492 BTRFS_RESERVE_FLUSH_LIMIT,
2493 BTRFS_RESERVE_FLUSH_EVICT,
2494 BTRFS_RESERVE_FLUSH_ALL,
2497 enum btrfs_flush_state {
2498 FLUSH_DELAYED_ITEMS_NR = 1,
2499 FLUSH_DELAYED_ITEMS = 2,
2500 FLUSH_DELAYED_REFS_NR = 3,
2501 FLUSH_DELAYED_REFS = 4,
2503 FLUSH_DELALLOC_WAIT = 6,
2505 ALLOC_CHUNK_FORCE = 8,
2506 RUN_DELAYED_IPUTS = 9,
2510 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2511 struct btrfs_block_rsv *rsv,
2512 int nitems, bool use_global_rsv);
2513 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2514 struct btrfs_block_rsv *rsv);
2515 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2517 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2518 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2519 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2520 u64 start, u64 end);
2521 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2522 u64 num_bytes, u64 *actual_bytes);
2523 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2525 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2526 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2527 struct btrfs_fs_info *fs_info);
2528 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2529 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2530 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2533 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2534 int level, int *slot);
2535 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2536 int btrfs_previous_item(struct btrfs_root *root,
2537 struct btrfs_path *path, u64 min_objectid,
2539 int btrfs_previous_extent_item(struct btrfs_root *root,
2540 struct btrfs_path *path, u64 min_objectid);
2541 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2542 struct btrfs_path *path,
2543 const struct btrfs_key *new_key);
2544 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2545 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2546 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2547 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2548 struct btrfs_key *key, int lowest_level,
2550 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2551 struct btrfs_path *path,
2553 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2556 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2557 struct btrfs_root *root, struct extent_buffer *buf,
2558 struct extent_buffer *parent, int parent_slot,
2559 struct extent_buffer **cow_ret);
2560 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2561 struct btrfs_root *root,
2562 struct extent_buffer *buf,
2563 struct extent_buffer **cow_ret, u64 new_root_objectid);
2564 int btrfs_block_can_be_shared(struct btrfs_root *root,
2565 struct extent_buffer *buf);
2566 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2567 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2568 int btrfs_split_item(struct btrfs_trans_handle *trans,
2569 struct btrfs_root *root,
2570 struct btrfs_path *path,
2571 const struct btrfs_key *new_key,
2572 unsigned long split_offset);
2573 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2574 struct btrfs_root *root,
2575 struct btrfs_path *path,
2576 const struct btrfs_key *new_key);
2577 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2578 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2579 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2580 const struct btrfs_key *key, struct btrfs_path *p,
2581 int ins_len, int cow);
2582 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2583 struct btrfs_path *p, u64 time_seq);
2584 int btrfs_search_slot_for_read(struct btrfs_root *root,
2585 const struct btrfs_key *key,
2586 struct btrfs_path *p, int find_higher,
2588 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2589 struct btrfs_root *root, struct extent_buffer *parent,
2590 int start_slot, u64 *last_ret,
2591 struct btrfs_key *progress);
2592 void btrfs_release_path(struct btrfs_path *p);
2593 struct btrfs_path *btrfs_alloc_path(void);
2594 void btrfs_free_path(struct btrfs_path *p);
2596 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2597 struct btrfs_path *path, int slot, int nr);
2598 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2599 struct btrfs_root *root,
2600 struct btrfs_path *path)
2602 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2605 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2606 const struct btrfs_key *cpu_key, u32 *data_size,
2607 u32 total_data, u32 total_size, int nr);
2608 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2609 const struct btrfs_key *key, void *data, u32 data_size);
2610 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2611 struct btrfs_root *root,
2612 struct btrfs_path *path,
2613 const struct btrfs_key *cpu_key, u32 *data_size,
2616 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2617 struct btrfs_root *root,
2618 struct btrfs_path *path,
2619 const struct btrfs_key *key,
2622 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2625 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2626 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2627 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2629 static inline int btrfs_next_old_item(struct btrfs_root *root,
2630 struct btrfs_path *p, u64 time_seq)
2633 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2634 return btrfs_next_old_leaf(root, p, time_seq);
2637 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2639 return btrfs_next_old_item(root, p, 0);
2641 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2642 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2643 struct btrfs_block_rsv *block_rsv,
2644 int update_ref, int for_reloc);
2645 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2646 struct btrfs_root *root,
2647 struct extent_buffer *node,
2648 struct extent_buffer *parent);
2649 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2652 * Do it this way so we only ever do one test_bit in the normal case.
2654 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2655 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2663 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2664 * anything except sleeping. This function is used to check the status of
2667 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2669 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2672 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2674 kfree(fs_info->balance_ctl);
2675 kfree(fs_info->delayed_root);
2676 kfree(fs_info->extent_root);
2677 kfree(fs_info->tree_root);
2678 kfree(fs_info->chunk_root);
2679 kfree(fs_info->dev_root);
2680 kfree(fs_info->csum_root);
2681 kfree(fs_info->quota_root);
2682 kfree(fs_info->uuid_root);
2683 kfree(fs_info->free_space_root);
2684 kfree(fs_info->super_copy);
2685 kfree(fs_info->super_for_commit);
2689 /* tree mod log functions from ctree.c */
2690 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2691 struct seq_list *elem);
2692 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2693 struct seq_list *elem);
2694 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2697 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2698 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2700 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2701 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2703 int btrfs_del_root(struct btrfs_trans_handle *trans,
2704 const struct btrfs_key *key);
2705 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2706 const struct btrfs_key *key,
2707 struct btrfs_root_item *item);
2708 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2709 struct btrfs_root *root,
2710 struct btrfs_key *key,
2711 struct btrfs_root_item *item);
2712 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2713 struct btrfs_path *path, struct btrfs_root_item *root_item,
2714 struct btrfs_key *root_key);
2715 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2716 void btrfs_set_root_node(struct btrfs_root_item *item,
2717 struct extent_buffer *node);
2718 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2719 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2720 struct btrfs_root *root);
2723 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2725 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2727 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2728 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2732 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2733 const char *name, int name_len);
2734 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2735 int name_len, struct btrfs_inode *dir,
2736 struct btrfs_key *location, u8 type, u64 index);
2737 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2738 struct btrfs_root *root,
2739 struct btrfs_path *path, u64 dir,
2740 const char *name, int name_len,
2742 struct btrfs_dir_item *
2743 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2744 struct btrfs_root *root,
2745 struct btrfs_path *path, u64 dir,
2746 u64 objectid, const char *name, int name_len,
2748 struct btrfs_dir_item *
2749 btrfs_search_dir_index_item(struct btrfs_root *root,
2750 struct btrfs_path *path, u64 dirid,
2751 const char *name, int name_len);
2752 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2753 struct btrfs_root *root,
2754 struct btrfs_path *path,
2755 struct btrfs_dir_item *di);
2756 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root,
2758 struct btrfs_path *path, u64 objectid,
2759 const char *name, u16 name_len,
2760 const void *data, u16 data_len);
2761 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2762 struct btrfs_root *root,
2763 struct btrfs_path *path, u64 dir,
2764 const char *name, u16 name_len,
2766 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2767 struct btrfs_path *path,
2772 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2773 struct btrfs_root *root, u64 offset);
2774 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2775 struct btrfs_root *root, u64 offset);
2776 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2779 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2780 struct btrfs_root *root,
2781 const char *name, int name_len,
2782 u64 inode_objectid, u64 ref_objectid, u64 index);
2783 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2784 struct btrfs_root *root,
2785 const char *name, int name_len,
2786 u64 inode_objectid, u64 ref_objectid, u64 *index);
2787 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2788 struct btrfs_root *root,
2789 struct btrfs_path *path, u64 objectid);
2790 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2791 *root, struct btrfs_path *path,
2792 struct btrfs_key *location, int mod);
2794 struct btrfs_inode_extref *
2795 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2796 struct btrfs_root *root,
2797 struct btrfs_path *path,
2798 const char *name, int name_len,
2799 u64 inode_objectid, u64 ref_objectid, int ins_len,
2802 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2803 int slot, const char *name,
2805 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2806 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2807 const char *name, int name_len);
2809 struct btrfs_dio_private;
2810 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2811 struct btrfs_root *root, u64 bytenr, u64 len);
2812 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2813 u64 offset, u8 *dst);
2814 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2815 struct btrfs_root *root,
2816 u64 objectid, u64 pos,
2817 u64 disk_offset, u64 disk_num_bytes,
2818 u64 num_bytes, u64 offset, u64 ram_bytes,
2819 u8 compression, u8 encryption, u16 other_encoding);
2820 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2821 struct btrfs_root *root,
2822 struct btrfs_path *path, u64 objectid,
2823 u64 bytenr, int mod);
2824 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2825 struct btrfs_root *root,
2826 struct btrfs_ordered_sum *sums);
2827 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2828 u64 file_start, int contig);
2829 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2830 struct list_head *list, int search_commit);
2831 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2832 const struct btrfs_path *path,
2833 struct btrfs_file_extent_item *fi,
2834 const bool new_inline,
2835 struct extent_map *em);
2838 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2839 u64 start, u64 len);
2840 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2841 u64 *orig_start, u64 *orig_block_len,
2844 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2845 struct btrfs_inode *inode);
2846 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2847 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2848 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2849 struct btrfs_root *root,
2850 struct btrfs_inode *dir, struct btrfs_inode *inode,
2851 const char *name, int name_len);
2852 int btrfs_add_link(struct btrfs_trans_handle *trans,
2853 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2854 const char *name, int name_len, int add_backref, u64 index);
2855 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2856 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2858 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2859 struct btrfs_root *root,
2860 struct inode *inode, u64 new_size,
2863 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2864 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2865 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2866 unsigned int extra_bits,
2867 struct extent_state **cached_state);
2868 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2869 struct btrfs_root *new_root,
2870 struct btrfs_root *parent_root,
2872 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2874 void btrfs_clear_delalloc_extent(struct inode *inode,
2875 struct extent_state *state, unsigned *bits);
2876 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2877 struct extent_state *other);
2878 void btrfs_split_delalloc_extent(struct inode *inode,
2879 struct extent_state *orig, u64 split);
2880 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2881 unsigned long bio_flags);
2882 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2883 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2884 int btrfs_readpage(struct file *file, struct page *page);
2885 void btrfs_evict_inode(struct inode *inode);
2886 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2887 struct inode *btrfs_alloc_inode(struct super_block *sb);
2888 void btrfs_destroy_inode(struct inode *inode);
2889 void btrfs_free_inode(struct inode *inode);
2890 int btrfs_drop_inode(struct inode *inode);
2891 int __init btrfs_init_cachep(void);
2892 void __cold btrfs_destroy_cachep(void);
2893 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2894 struct btrfs_root *root, struct btrfs_path *path);
2895 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2896 struct btrfs_root *root);
2897 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2898 struct page *page, size_t pg_offset,
2899 u64 start, u64 end);
2900 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2901 struct btrfs_root *root,
2902 struct inode *inode);
2903 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2904 struct btrfs_root *root, struct inode *inode);
2905 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2906 struct btrfs_inode *inode);
2907 int btrfs_orphan_cleanup(struct btrfs_root *root);
2908 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2909 void btrfs_add_delayed_iput(struct inode *inode);
2910 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2911 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2912 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2913 u64 start, u64 num_bytes, u64 min_size,
2914 loff_t actual_len, u64 *alloc_hint);
2915 int btrfs_prealloc_file_range_trans(struct inode *inode,
2916 struct btrfs_trans_handle *trans, int mode,
2917 u64 start, u64 num_bytes, u64 min_size,
2918 loff_t actual_len, u64 *alloc_hint);
2919 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2920 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2921 struct writeback_control *wbc);
2922 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2923 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2924 u64 end, int uptodate);
2925 extern const struct dentry_operations btrfs_dentry_operations;
2928 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2929 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2930 int btrfs_ioctl_get_supported_features(void __user *arg);
2931 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2932 int __pure btrfs_is_empty_uuid(u8 *uuid);
2933 int btrfs_defrag_file(struct inode *inode, struct file *file,
2934 struct btrfs_ioctl_defrag_range_args *range,
2935 u64 newer_than, unsigned long max_pages);
2936 void btrfs_get_block_group_info(struct list_head *groups_list,
2937 struct btrfs_ioctl_space_info *space);
2938 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2939 struct btrfs_ioctl_balance_args *bargs);
2942 int __init btrfs_auto_defrag_init(void);
2943 void __cold btrfs_auto_defrag_exit(void);
2944 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2945 struct btrfs_inode *inode);
2946 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2947 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2948 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2949 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2951 extern const struct file_operations btrfs_file_operations;
2952 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2953 struct btrfs_root *root, struct inode *inode,
2954 struct btrfs_path *path, u64 start, u64 end,
2955 u64 *drop_end, int drop_cache,
2957 u32 extent_item_size,
2959 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2960 struct btrfs_root *root, struct inode *inode, u64 start,
2961 u64 end, int drop_cache);
2962 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2963 const u64 start, const u64 end,
2964 struct btrfs_clone_extent_info *clone_info,
2965 struct btrfs_trans_handle **trans_out);
2966 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2967 struct btrfs_inode *inode, u64 start, u64 end);
2968 int btrfs_release_file(struct inode *inode, struct file *file);
2969 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2970 size_t num_pages, loff_t pos, size_t write_bytes,
2971 struct extent_state **cached);
2972 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2973 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
2974 struct file *file_out, loff_t pos_out,
2975 loff_t len, unsigned int remap_flags);
2978 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2979 struct btrfs_root *root);
2982 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
2983 unsigned long new_flags);
2984 int btrfs_sync_fs(struct super_block *sb, int wait);
2986 static inline __printf(2, 3) __cold
2987 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
2991 #ifdef CONFIG_PRINTK
2994 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
2996 #define btrfs_printk(fs_info, fmt, args...) \
2997 btrfs_no_printk(fs_info, fmt, ##args)
3000 #define btrfs_emerg(fs_info, fmt, args...) \
3001 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3002 #define btrfs_alert(fs_info, fmt, args...) \
3003 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3004 #define btrfs_crit(fs_info, fmt, args...) \
3005 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3006 #define btrfs_err(fs_info, fmt, args...) \
3007 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3008 #define btrfs_warn(fs_info, fmt, args...) \
3009 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3010 #define btrfs_notice(fs_info, fmt, args...) \
3011 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3012 #define btrfs_info(fs_info, fmt, args...) \
3013 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3016 * Wrappers that use printk_in_rcu
3018 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3019 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3020 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3021 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3022 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3023 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3024 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3025 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3026 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3027 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3028 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3029 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3030 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3031 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3034 * Wrappers that use a ratelimited printk_in_rcu
3036 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3037 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3038 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3039 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3040 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3041 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3042 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3043 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3044 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3045 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3046 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3047 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3048 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3049 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3052 * Wrappers that use a ratelimited printk
3054 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3055 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3056 #define btrfs_alert_rl(fs_info, fmt, args...) \
3057 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3058 #define btrfs_crit_rl(fs_info, fmt, args...) \
3059 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3060 #define btrfs_err_rl(fs_info, fmt, args...) \
3061 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3062 #define btrfs_warn_rl(fs_info, fmt, args...) \
3063 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3064 #define btrfs_notice_rl(fs_info, fmt, args...) \
3065 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3066 #define btrfs_info_rl(fs_info, fmt, args...) \
3067 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3069 #if defined(CONFIG_DYNAMIC_DEBUG)
3070 #define btrfs_debug(fs_info, fmt, args...) \
3071 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3072 fs_info, KERN_DEBUG fmt, ##args)
3073 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3074 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3075 fs_info, KERN_DEBUG fmt, ##args)
3076 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3077 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3078 fs_info, KERN_DEBUG fmt, ##args)
3079 #define btrfs_debug_rl(fs_info, fmt, args...) \
3080 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3081 fs_info, KERN_DEBUG fmt, ##args)
3082 #elif defined(DEBUG)
3083 #define btrfs_debug(fs_info, fmt, args...) \
3084 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3085 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3086 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3087 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3088 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3089 #define btrfs_debug_rl(fs_info, fmt, args...) \
3090 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3092 #define btrfs_debug(fs_info, fmt, args...) \
3093 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3094 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3095 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3096 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3097 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3098 #define btrfs_debug_rl(fs_info, fmt, args...) \
3099 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3102 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3105 btrfs_printk(fs_info, fmt, ##args); \
3106 rcu_read_unlock(); \
3109 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3112 btrfs_no_printk(fs_info, fmt, ##args); \
3113 rcu_read_unlock(); \
3116 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3118 static DEFINE_RATELIMIT_STATE(_rs, \
3119 DEFAULT_RATELIMIT_INTERVAL, \
3120 DEFAULT_RATELIMIT_BURST); \
3121 if (__ratelimit(&_rs)) \
3122 btrfs_printk(fs_info, fmt, ##args); \
3125 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3128 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3129 rcu_read_unlock(); \
3133 static inline void assfail(const char *expr, const char *file, int line)
3135 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3136 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3141 #define ASSERT(expr) \
3142 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3145 * Use that for functions that are conditionally exported for sanity tests but
3148 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3149 #define EXPORT_FOR_TESTS static
3151 #define EXPORT_FOR_TESTS
3155 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3158 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3163 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3164 unsigned int line, int errno, const char *fmt, ...);
3166 const char * __attribute_const__ btrfs_decode_error(int errno);
3169 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3170 const char *function,
3171 unsigned int line, int errno);
3174 * Call btrfs_abort_transaction as early as possible when an error condition is
3175 * detected, that way the exact line number is reported.
3177 #define btrfs_abort_transaction(trans, errno) \
3179 /* Report first abort since mount */ \
3180 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3181 &((trans)->fs_info->fs_state))) { \
3182 if ((errno) != -EIO) { \
3183 WARN(1, KERN_DEBUG \
3184 "BTRFS: Transaction aborted (error %d)\n", \
3187 btrfs_debug((trans)->fs_info, \
3188 "Transaction aborted (error %d)", \
3192 __btrfs_abort_transaction((trans), __func__, \
3193 __LINE__, (errno)); \
3196 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3198 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3199 (errno), fmt, ##args); \
3204 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3205 unsigned int line, int errno, const char *fmt, ...);
3207 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3208 * will panic(). Otherwise we BUG() here.
3210 #define btrfs_panic(fs_info, errno, fmt, args...) \
3212 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3217 /* compatibility and incompatibility defines */
3219 #define btrfs_set_fs_incompat(__fs_info, opt) \
3220 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3223 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3224 u64 flag, const char* name)
3226 struct btrfs_super_block *disk_super;
3229 disk_super = fs_info->super_copy;
3230 features = btrfs_super_incompat_flags(disk_super);
3231 if (!(features & flag)) {
3232 spin_lock(&fs_info->super_lock);
3233 features = btrfs_super_incompat_flags(disk_super);
3234 if (!(features & flag)) {
3236 btrfs_set_super_incompat_flags(disk_super, features);
3238 "setting incompat feature flag for %s (0x%llx)",
3241 spin_unlock(&fs_info->super_lock);
3245 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3246 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3249 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3250 u64 flag, const char* name)
3252 struct btrfs_super_block *disk_super;
3255 disk_super = fs_info->super_copy;
3256 features = btrfs_super_incompat_flags(disk_super);
3257 if (features & flag) {
3258 spin_lock(&fs_info->super_lock);
3259 features = btrfs_super_incompat_flags(disk_super);
3260 if (features & flag) {
3262 btrfs_set_super_incompat_flags(disk_super, features);
3264 "clearing incompat feature flag for %s (0x%llx)",
3267 spin_unlock(&fs_info->super_lock);
3271 #define btrfs_fs_incompat(fs_info, opt) \
3272 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3274 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3276 struct btrfs_super_block *disk_super;
3277 disk_super = fs_info->super_copy;
3278 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3281 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3282 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3285 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3286 u64 flag, const char *name)
3288 struct btrfs_super_block *disk_super;
3291 disk_super = fs_info->super_copy;
3292 features = btrfs_super_compat_ro_flags(disk_super);
3293 if (!(features & flag)) {
3294 spin_lock(&fs_info->super_lock);
3295 features = btrfs_super_compat_ro_flags(disk_super);
3296 if (!(features & flag)) {
3298 btrfs_set_super_compat_ro_flags(disk_super, features);
3300 "setting compat-ro feature flag for %s (0x%llx)",
3303 spin_unlock(&fs_info->super_lock);
3307 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3308 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3311 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3312 u64 flag, const char *name)
3314 struct btrfs_super_block *disk_super;
3317 disk_super = fs_info->super_copy;
3318 features = btrfs_super_compat_ro_flags(disk_super);
3319 if (features & flag) {
3320 spin_lock(&fs_info->super_lock);
3321 features = btrfs_super_compat_ro_flags(disk_super);
3322 if (features & flag) {
3324 btrfs_set_super_compat_ro_flags(disk_super, features);
3326 "clearing compat-ro feature flag for %s (0x%llx)",
3329 spin_unlock(&fs_info->super_lock);
3333 #define btrfs_fs_compat_ro(fs_info, opt) \
3334 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3336 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3338 struct btrfs_super_block *disk_super;
3339 disk_super = fs_info->super_copy;
3340 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3344 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3345 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3346 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3347 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3348 struct inode *inode, struct inode *dir);
3350 #define btrfs_get_acl NULL
3351 #define btrfs_set_acl NULL
3352 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3353 struct inode *inode, struct inode *dir)
3360 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3361 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3362 struct btrfs_root *root);
3363 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3364 struct btrfs_root *root);
3365 int btrfs_recover_relocation(struct btrfs_root *root);
3366 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3367 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3368 struct btrfs_root *root, struct extent_buffer *buf,
3369 struct extent_buffer *cow);
3370 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3371 u64 *bytes_to_reserve);
3372 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3373 struct btrfs_pending_snapshot *pending);
3376 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3377 u64 end, struct btrfs_scrub_progress *progress,
3378 int readonly, int is_dev_replace);
3379 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3380 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3381 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3382 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3383 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3384 struct btrfs_scrub_progress *progress);
3385 static inline void btrfs_init_full_stripe_locks_tree(
3386 struct btrfs_full_stripe_locks_tree *locks_root)
3388 locks_root->root = RB_ROOT;
3389 mutex_init(&locks_root->lock);
3393 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3394 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3395 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3397 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3399 btrfs_bio_counter_sub(fs_info, 1);
3403 struct reada_control {
3404 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3405 struct btrfs_key key_start;
3406 struct btrfs_key key_end; /* exclusive */
3409 wait_queue_head_t wait;
3411 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3412 struct btrfs_key *start, struct btrfs_key *end);
3413 int btrfs_reada_wait(void *handle);
3414 void btrfs_reada_detach(void *handle);
3415 int btree_readahead_hook(struct extent_buffer *eb, int err);
3417 static inline int is_fstree(u64 rootid)
3419 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3420 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3421 !btrfs_qgroup_level(rootid)))
3426 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3428 return signal_pending(current);
3431 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3433 /* Sanity test specific functions */
3434 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3435 void btrfs_test_inode_set_ops(struct inode *inode);
3436 void btrfs_test_destroy_inode(struct inode *inode);
3438 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3440 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3443 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)