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.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
34 #include "block-rsv.h"
36 struct btrfs_trans_handle;
37 struct btrfs_transaction;
38 struct btrfs_pending_snapshot;
39 struct btrfs_delayed_ref_root;
40 struct btrfs_space_info;
41 struct btrfs_block_group_cache;
42 extern struct kmem_cache *btrfs_trans_handle_cachep;
43 extern struct kmem_cache *btrfs_bit_radix_cachep;
44 extern struct kmem_cache *btrfs_path_cachep;
45 extern struct kmem_cache *btrfs_free_space_cachep;
46 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
47 struct btrfs_ordered_sum;
50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
53 * Maximum number of mirrors that can be available for all profiles counting
54 * the target device of dev-replace as one. During an active device replace
55 * procedure, the target device of the copy operation is a mirror for the
56 * filesystem data as well that can be used to read data in order to repair
57 * read errors on other disks.
59 * Current value is derived from RAID1 with 2 copies.
61 #define BTRFS_MAX_MIRRORS (2 + 1)
63 #define BTRFS_MAX_LEVEL 8
65 #define BTRFS_OLDEST_GENERATION 0ULL
68 * the max metadata block size. This limit is somewhat artificial,
69 * but the memmove costs go through the roof for larger blocks.
71 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
74 * we can actually store much bigger names, but lets not confuse the rest
77 #define BTRFS_NAME_LEN 255
80 * Theoretical limit is larger, but we keep this down to a sane
81 * value. That should limit greatly the possibility of collisions on
84 #define BTRFS_LINK_MAX 65535U
86 /* four bytes for CRC32 */
87 static const int btrfs_csum_sizes[] = { 4 };
88 static const char *btrfs_csum_names[] = { "crc32c" };
90 #define BTRFS_EMPTY_DIR_SIZE 0
92 /* ioprio of readahead is set to idle */
93 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
95 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
98 * Use large batch size to reduce overhead of metadata updates. On the reader
99 * side, we only read it when we are close to ENOSPC and the read overhead is
100 * mostly related to the number of CPUs, so it is OK to use arbitrary large
103 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
105 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
109 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
111 static inline u32 count_max_extents(u64 size)
113 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
116 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
118 BUG_ON(num_stripes == 0);
119 return sizeof(struct btrfs_chunk) +
120 sizeof(struct btrfs_stripe) * (num_stripes - 1);
124 * Runtime (in-memory) states of filesystem
127 /* Global indicator of serious filesystem errors */
128 BTRFS_FS_STATE_ERROR,
130 * Filesystem is being remounted, allow to skip some operations, like
133 BTRFS_FS_STATE_REMOUNTING,
134 /* Track if a transaction abort has been reported on this filesystem */
135 BTRFS_FS_STATE_TRANS_ABORTED,
137 * Bio operations should be blocked on this filesystem because a source
138 * or target device is being destroyed as part of a device replace
140 BTRFS_FS_STATE_DEV_REPLACING,
141 /* The btrfs_fs_info created for self-tests */
142 BTRFS_FS_STATE_DUMMY_FS_INFO,
145 #define BTRFS_BACKREF_REV_MAX 256
146 #define BTRFS_BACKREF_REV_SHIFT 56
147 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
148 BTRFS_BACKREF_REV_SHIFT)
150 #define BTRFS_OLD_BACKREF_REV 0
151 #define BTRFS_MIXED_BACKREF_REV 1
154 * every tree block (leaf or node) starts with this header.
156 struct btrfs_header {
157 /* these first four must match the super block */
158 u8 csum[BTRFS_CSUM_SIZE];
159 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
160 __le64 bytenr; /* which block this node is supposed to live in */
163 /* allowed to be different from the super from here on down */
164 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
169 } __attribute__ ((__packed__));
172 * this is a very generous portion of the super block, giving us
173 * room to translate 14 chunks with 3 stripes each.
175 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
178 * just in case we somehow lose the roots and are not able to mount,
179 * we store an array of the roots from previous transactions
182 #define BTRFS_NUM_BACKUP_ROOTS 4
183 struct btrfs_root_backup {
185 __le64 tree_root_gen;
188 __le64 chunk_root_gen;
191 __le64 extent_root_gen;
200 __le64 csum_root_gen;
210 u8 extent_root_level;
214 /* future and to align */
216 } __attribute__ ((__packed__));
219 * the super block basically lists the main trees of the FS
220 * it currently lacks any block count etc etc
222 struct btrfs_super_block {
223 /* the first 4 fields must match struct btrfs_header */
224 u8 csum[BTRFS_CSUM_SIZE];
225 /* FS specific UUID, visible to user */
226 u8 fsid[BTRFS_FSID_SIZE];
227 __le64 bytenr; /* this block number */
230 /* allowed to be different from the btrfs_header from here own down */
237 /* this will help find the new super based on the log root */
238 __le64 log_root_transid;
241 __le64 root_dir_objectid;
245 __le32 __unused_leafsize;
247 __le32 sys_chunk_array_size;
248 __le64 chunk_root_generation;
250 __le64 compat_ro_flags;
251 __le64 incompat_flags;
256 struct btrfs_dev_item dev_item;
258 char label[BTRFS_LABEL_SIZE];
260 __le64 cache_generation;
261 __le64 uuid_tree_generation;
263 /* the UUID written into btree blocks */
264 u8 metadata_uuid[BTRFS_FSID_SIZE];
266 /* future expansion */
268 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
269 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
270 } __attribute__ ((__packed__));
273 * Compat flags that we support. If any incompat flags are set other than the
274 * ones specified below then we will fail to mount
276 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
277 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
278 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
280 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
281 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
282 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
284 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
285 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
287 #define BTRFS_FEATURE_INCOMPAT_SUPP \
288 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
289 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
290 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
291 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
292 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
293 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
294 BTRFS_FEATURE_INCOMPAT_RAID56 | \
295 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
296 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
297 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
298 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
300 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
301 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
302 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
305 * A leaf is full of items. offset and size tell us where to find
306 * the item in the leaf (relative to the start of the data area)
309 struct btrfs_disk_key key;
312 } __attribute__ ((__packed__));
315 * leaves have an item area and a data area:
316 * [item0, item1....itemN] [free space] [dataN...data1, data0]
318 * The data is separate from the items to get the keys closer together
322 struct btrfs_header header;
323 struct btrfs_item items[];
324 } __attribute__ ((__packed__));
327 * all non-leaf blocks are nodes, they hold only keys and pointers to
330 struct btrfs_key_ptr {
331 struct btrfs_disk_key key;
334 } __attribute__ ((__packed__));
337 struct btrfs_header header;
338 struct btrfs_key_ptr ptrs[];
339 } __attribute__ ((__packed__));
342 * btrfs_paths remember the path taken from the root down to the leaf.
343 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
344 * to any other levels that are present.
346 * The slots array records the index of the item or block pointer
347 * used while walking the tree.
349 enum { READA_NONE, READA_BACK, READA_FORWARD };
351 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
352 int slots[BTRFS_MAX_LEVEL];
353 /* if there is real range locking, this locks field will change */
354 u8 locks[BTRFS_MAX_LEVEL];
356 /* keep some upper locks as we walk down */
360 * set by btrfs_split_item, tells search_slot to keep all locks
361 * and to force calls to keep space in the nodes
363 unsigned int search_for_split:1;
364 unsigned int keep_locks:1;
365 unsigned int skip_locking:1;
366 unsigned int leave_spinning:1;
367 unsigned int search_commit_root:1;
368 unsigned int need_commit_sem:1;
369 unsigned int skip_release_on_error:1;
371 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
372 sizeof(struct btrfs_item))
373 struct btrfs_dev_replace {
374 u64 replace_state; /* see #define above */
375 time64_t time_started; /* seconds since 1-Jan-1970 */
376 time64_t time_stopped; /* seconds since 1-Jan-1970 */
377 atomic64_t num_write_errors;
378 atomic64_t num_uncorrectable_read_errors;
381 u64 committed_cursor_left;
382 u64 cursor_left_last_write_of_item;
385 u64 cont_reading_from_srcdev_mode; /* see #define above */
388 int item_needs_writeback;
389 struct btrfs_device *srcdev;
390 struct btrfs_device *tgtdev;
392 struct mutex lock_finishing_cancel_unmount;
393 struct rw_semaphore rwsem;
395 struct btrfs_scrub_progress scrub_progress;
397 struct percpu_counter bio_counter;
398 wait_queue_head_t replace_wait;
402 * free clusters are used to claim free space in relatively large chunks,
403 * allowing us to do less seeky writes. They are used for all metadata
404 * allocations. In ssd_spread mode they are also used for data allocations.
406 struct btrfs_free_cluster {
408 spinlock_t refill_lock;
411 /* largest extent in this cluster */
414 /* first extent starting offset */
417 /* We did a full search and couldn't create a cluster */
420 struct btrfs_block_group_cache *block_group;
422 * when a cluster is allocated from a block group, we put the
423 * cluster onto a list in the block group so that it can
424 * be freed before the block group is freed.
426 struct list_head block_group_list;
429 enum btrfs_caching_type {
433 BTRFS_CACHE_FINISHED,
438 * Tree to record all locked full stripes of a RAID5/6 block group
440 struct btrfs_full_stripe_locks_tree {
445 /* delayed seq elem */
447 struct list_head list;
451 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
453 #define SEQ_LAST ((u64)-1)
455 enum btrfs_orphan_cleanup_state {
456 ORPHAN_CLEANUP_STARTED = 1,
457 ORPHAN_CLEANUP_DONE = 2,
460 void btrfs_init_async_reclaim_work(struct work_struct *work);
463 struct reloc_control;
465 struct btrfs_fs_devices;
466 struct btrfs_balance_control;
467 struct btrfs_delayed_root;
470 * Block group or device which contains an active swapfile. Used for preventing
471 * unsafe operations while a swapfile is active.
473 * These are sorted on (ptr, inode) (note that a block group or device can
474 * contain more than one swapfile). We compare the pointer values because we
475 * don't actually care what the object is, we just need a quick check whether
476 * the object exists in the rbtree.
478 struct btrfs_swapfile_pin {
483 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
484 * ptr points to a struct btrfs_device.
489 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
493 BTRFS_FS_CLOSING_START,
494 BTRFS_FS_CLOSING_DONE,
495 BTRFS_FS_LOG_RECOVERING,
497 BTRFS_FS_QUOTA_ENABLED,
498 BTRFS_FS_UPDATE_UUID_TREE_GEN,
499 BTRFS_FS_CREATING_FREE_SPACE_TREE,
503 BTRFS_FS_QUOTA_OVERRIDE,
504 /* Used to record internally whether fs has been frozen */
507 * Indicate that a whole-filesystem exclusive operation is running
508 * (device replace, resize, device add/delete, balance)
512 * To info transaction_kthread we need an immediate commit so it
513 * doesn't need to wait for commit_interval
515 BTRFS_FS_NEED_ASYNC_COMMIT,
517 * Indicate that balance has been set up from the ioctl and is in the
518 * main phase. The fs_info::balance_ctl is initialized.
519 * Set and cleared while holding fs_info::balance_mutex.
521 BTRFS_FS_BALANCE_RUNNING,
523 /* Indicate that the cleaner thread is awake and doing something. */
524 BTRFS_FS_CLEANER_RUNNING,
527 * The checksumming has an optimized version and is considered fast,
528 * so we don't need to offload checksums to workqueues.
530 BTRFS_FS_CSUM_IMPL_FAST,
533 struct btrfs_fs_info {
534 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
536 struct btrfs_root *extent_root;
537 struct btrfs_root *tree_root;
538 struct btrfs_root *chunk_root;
539 struct btrfs_root *dev_root;
540 struct btrfs_root *fs_root;
541 struct btrfs_root *csum_root;
542 struct btrfs_root *quota_root;
543 struct btrfs_root *uuid_root;
544 struct btrfs_root *free_space_root;
546 /* the log root tree is a directory of all the other log roots */
547 struct btrfs_root *log_root_tree;
549 spinlock_t fs_roots_radix_lock;
550 struct radix_tree_root fs_roots_radix;
552 /* block group cache stuff */
553 spinlock_t block_group_cache_lock;
554 u64 first_logical_byte;
555 struct rb_root block_group_cache_tree;
557 /* keep track of unallocated space */
558 atomic64_t free_chunk_space;
560 struct extent_io_tree freed_extents[2];
561 struct extent_io_tree *pinned_extents;
563 /* logical->physical extent mapping */
564 struct extent_map_tree mapping_tree;
567 * block reservation for extent, checksum, root tree and
568 * delayed dir index item
570 struct btrfs_block_rsv global_block_rsv;
571 /* block reservation for metadata operations */
572 struct btrfs_block_rsv trans_block_rsv;
573 /* block reservation for chunk tree */
574 struct btrfs_block_rsv chunk_block_rsv;
575 /* block reservation for delayed operations */
576 struct btrfs_block_rsv delayed_block_rsv;
577 /* block reservation for delayed refs */
578 struct btrfs_block_rsv delayed_refs_rsv;
580 struct btrfs_block_rsv empty_block_rsv;
583 u64 last_trans_committed;
584 u64 avg_delayed_ref_runtime;
587 * this is updated to the current trans every time a full commit
588 * is required instead of the faster short fsync log commits
590 u64 last_trans_log_full_commit;
591 unsigned long mount_opt;
593 * Track requests for actions that need to be done during transaction
594 * commit (like for some mount options).
596 unsigned long pending_changes;
597 unsigned long compress_type:4;
598 unsigned int compress_level;
601 * It is a suggestive number, the read side is safe even it gets a
602 * wrong number because we will write out the data into a regular
603 * extent. The write side(mount/remount) is under ->s_umount lock,
604 * so it is also safe.
608 struct btrfs_transaction *running_transaction;
609 wait_queue_head_t transaction_throttle;
610 wait_queue_head_t transaction_wait;
611 wait_queue_head_t transaction_blocked_wait;
612 wait_queue_head_t async_submit_wait;
615 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
616 * when they are updated.
618 * Because we do not clear the flags for ever, so we needn't use
619 * the lock on the read side.
621 * We also needn't use the lock when we mount the fs, because
622 * there is no other task which will update the flag.
624 spinlock_t super_lock;
625 struct btrfs_super_block *super_copy;
626 struct btrfs_super_block *super_for_commit;
627 struct super_block *sb;
628 struct inode *btree_inode;
629 struct mutex tree_log_mutex;
630 struct mutex transaction_kthread_mutex;
631 struct mutex cleaner_mutex;
632 struct mutex chunk_mutex;
635 * this is taken to make sure we don't set block groups ro after
636 * the free space cache has been allocated on them
638 struct mutex ro_block_group_mutex;
640 /* this is used during read/modify/write to make sure
641 * no two ios are trying to mod the same stripe at the same
644 struct btrfs_stripe_hash_table *stripe_hash_table;
647 * this protects the ordered operations list only while we are
648 * processing all of the entries on it. This way we make
649 * sure the commit code doesn't find the list temporarily empty
650 * because another function happens to be doing non-waiting preflush
651 * before jumping into the main commit.
653 struct mutex ordered_operations_mutex;
655 struct rw_semaphore commit_root_sem;
657 struct rw_semaphore cleanup_work_sem;
659 struct rw_semaphore subvol_sem;
660 struct srcu_struct subvol_srcu;
662 spinlock_t trans_lock;
664 * the reloc mutex goes with the trans lock, it is taken
665 * during commit to protect us from the relocation code
667 struct mutex reloc_mutex;
669 struct list_head trans_list;
670 struct list_head dead_roots;
671 struct list_head caching_block_groups;
673 spinlock_t delayed_iput_lock;
674 struct list_head delayed_iputs;
675 atomic_t nr_delayed_iputs;
676 wait_queue_head_t delayed_iputs_wait;
678 /* this protects tree_mod_seq_list */
679 spinlock_t tree_mod_seq_lock;
680 atomic64_t tree_mod_seq;
681 struct list_head tree_mod_seq_list;
683 /* this protects tree_mod_log */
684 rwlock_t tree_mod_log_lock;
685 struct rb_root tree_mod_log;
687 atomic_t async_delalloc_pages;
690 * this is used to protect the following list -- ordered_roots.
692 spinlock_t ordered_root_lock;
695 * all fs/file tree roots in which there are data=ordered extents
696 * pending writeback are added into this list.
698 * these can span multiple transactions and basically include
699 * every dirty data page that isn't from nodatacow
701 struct list_head ordered_roots;
703 struct mutex delalloc_root_mutex;
704 spinlock_t delalloc_root_lock;
705 /* all fs/file tree roots that have delalloc inodes. */
706 struct list_head delalloc_roots;
709 * there is a pool of worker threads for checksumming during writes
710 * and a pool for checksumming after reads. This is because readers
711 * can run with FS locks held, and the writers may be waiting for
712 * those locks. We don't want ordering in the pending list to cause
713 * deadlocks, and so the two are serviced separately.
715 * A third pool does submit_bio to avoid deadlocking with the other
718 struct btrfs_workqueue *workers;
719 struct btrfs_workqueue *delalloc_workers;
720 struct btrfs_workqueue *flush_workers;
721 struct btrfs_workqueue *endio_workers;
722 struct btrfs_workqueue *endio_meta_workers;
723 struct btrfs_workqueue *endio_raid56_workers;
724 struct btrfs_workqueue *endio_repair_workers;
725 struct btrfs_workqueue *rmw_workers;
726 struct btrfs_workqueue *endio_meta_write_workers;
727 struct btrfs_workqueue *endio_write_workers;
728 struct btrfs_workqueue *endio_freespace_worker;
729 struct btrfs_workqueue *submit_workers;
730 struct btrfs_workqueue *caching_workers;
731 struct btrfs_workqueue *readahead_workers;
734 * fixup workers take dirty pages that didn't properly go through
735 * the cow mechanism and make them safe to write. It happens
736 * for the sys_munmap function call path
738 struct btrfs_workqueue *fixup_workers;
739 struct btrfs_workqueue *delayed_workers;
741 /* the extent workers do delayed refs on the extent allocation tree */
742 struct btrfs_workqueue *extent_workers;
743 struct task_struct *transaction_kthread;
744 struct task_struct *cleaner_kthread;
745 u32 thread_pool_size;
747 struct kobject *space_info_kobj;
751 /* used to keep from writing metadata until there is a nice batch */
752 struct percpu_counter dirty_metadata_bytes;
753 struct percpu_counter delalloc_bytes;
754 struct percpu_counter dio_bytes;
755 s32 dirty_metadata_batch;
758 struct list_head dirty_cowonly_roots;
760 struct btrfs_fs_devices *fs_devices;
763 * The space_info list is effectively read only after initial
764 * setup. It is populated at mount time and cleaned up after
765 * all block groups are removed. RCU is used to protect it.
767 struct list_head space_info;
769 struct btrfs_space_info *data_sinfo;
771 struct reloc_control *reloc_ctl;
773 /* data_alloc_cluster is only used in ssd_spread mode */
774 struct btrfs_free_cluster data_alloc_cluster;
776 /* all metadata allocations go through this cluster */
777 struct btrfs_free_cluster meta_alloc_cluster;
779 /* auto defrag inodes go here */
780 spinlock_t defrag_inodes_lock;
781 struct rb_root defrag_inodes;
782 atomic_t defrag_running;
784 /* Used to protect avail_{data, metadata, system}_alloc_bits */
785 seqlock_t profiles_lock;
787 * these three are in extended format (availability of single
788 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
789 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
791 u64 avail_data_alloc_bits;
792 u64 avail_metadata_alloc_bits;
793 u64 avail_system_alloc_bits;
795 /* restriper state */
796 spinlock_t balance_lock;
797 struct mutex balance_mutex;
798 atomic_t balance_pause_req;
799 atomic_t balance_cancel_req;
800 struct btrfs_balance_control *balance_ctl;
801 wait_queue_head_t balance_wait_q;
803 u32 data_chunk_allocations;
808 /* private scrub information */
809 struct mutex scrub_lock;
810 atomic_t scrubs_running;
811 atomic_t scrub_pause_req;
812 atomic_t scrubs_paused;
813 atomic_t scrub_cancel_req;
814 wait_queue_head_t scrub_pause_wait;
816 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
819 refcount_t scrub_workers_refcnt;
820 struct btrfs_workqueue *scrub_workers;
821 struct btrfs_workqueue *scrub_wr_completion_workers;
822 struct btrfs_workqueue *scrub_parity_workers;
824 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
825 u32 check_integrity_print_mask;
827 /* is qgroup tracking in a consistent state? */
830 /* holds configuration and tracking. Protected by qgroup_lock */
831 struct rb_root qgroup_tree;
832 spinlock_t qgroup_lock;
835 * used to avoid frequently calling ulist_alloc()/ulist_free()
836 * when doing qgroup accounting, it must be protected by qgroup_lock.
838 struct ulist *qgroup_ulist;
840 /* protect user change for quota operations */
841 struct mutex qgroup_ioctl_lock;
843 /* list of dirty qgroups to be written at next commit */
844 struct list_head dirty_qgroups;
846 /* used by qgroup for an efficient tree traversal */
849 /* qgroup rescan items */
850 struct mutex qgroup_rescan_lock; /* protects the progress item */
851 struct btrfs_key qgroup_rescan_progress;
852 struct btrfs_workqueue *qgroup_rescan_workers;
853 struct completion qgroup_rescan_completion;
854 struct btrfs_work qgroup_rescan_work;
855 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
857 /* filesystem state */
858 unsigned long fs_state;
860 struct btrfs_delayed_root *delayed_root;
863 spinlock_t reada_lock;
864 struct radix_tree_root reada_tree;
866 /* readahead works cnt */
867 atomic_t reada_works_cnt;
869 /* Extent buffer radix tree */
870 spinlock_t buffer_lock;
871 struct radix_tree_root buffer_radix;
873 /* next backup root to be overwritten */
874 int backup_root_index;
876 /* device replace state */
877 struct btrfs_dev_replace dev_replace;
879 struct semaphore uuid_tree_rescan_sem;
881 /* Used to reclaim the metadata space in the background. */
882 struct work_struct async_reclaim_work;
884 spinlock_t unused_bgs_lock;
885 struct list_head unused_bgs;
886 struct mutex unused_bg_unpin_mutex;
887 struct mutex delete_unused_bgs_mutex;
889 /* Cached block sizes */
894 /* Block groups and devices containing active swapfiles. */
895 spinlock_t swapfile_pins_lock;
896 struct rb_root swapfile_pins;
898 struct crypto_shash *csum_shash;
901 * Number of send operations in progress.
902 * Updated while holding fs_info::balance_mutex.
904 int send_in_progress;
906 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
907 spinlock_t ref_verify_lock;
908 struct rb_root block_tree;
912 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
914 return sb->s_fs_info;
917 struct btrfs_subvolume_writers {
918 struct percpu_counter counter;
919 wait_queue_head_t wait;
923 * The state of btrfs root
927 * btrfs_record_root_in_trans is a multi-step process, and it can race
928 * with the balancing code. But the race is very small, and only the
929 * first time the root is added to each transaction. So IN_TRANS_SETUP
930 * is used to tell us when more checks are required
932 BTRFS_ROOT_IN_TRANS_SETUP,
934 BTRFS_ROOT_TRACK_DIRTY,
936 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
937 BTRFS_ROOT_DEFRAG_RUNNING,
938 BTRFS_ROOT_FORCE_COW,
939 BTRFS_ROOT_MULTI_LOG_TASKS,
944 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
946 * Set for the subvolume tree owning the reloc tree.
948 BTRFS_ROOT_DEAD_RELOC_TREE,
949 /* Mark dead root stored on device whose cleanup needs to be resumed */
950 BTRFS_ROOT_DEAD_TREE,
954 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
955 * code. For detail check comment in fs/btrfs/qgroup.c.
957 struct btrfs_qgroup_swapped_blocks {
959 /* RM_EMPTY_ROOT() of above blocks[] */
961 struct rb_root blocks[BTRFS_MAX_LEVEL];
965 * in ram representation of the tree. extent_root is used for all allocations
966 * and for the extent tree extent_root root.
969 struct extent_buffer *node;
971 struct extent_buffer *commit_root;
972 struct btrfs_root *log_root;
973 struct btrfs_root *reloc_root;
976 struct btrfs_root_item root_item;
977 struct btrfs_key root_key;
978 struct btrfs_fs_info *fs_info;
979 struct extent_io_tree dirty_log_pages;
981 struct mutex objectid_mutex;
983 spinlock_t accounting_lock;
984 struct btrfs_block_rsv *block_rsv;
986 /* free ino cache stuff */
987 struct btrfs_free_space_ctl *free_ino_ctl;
988 enum btrfs_caching_type ino_cache_state;
989 spinlock_t ino_cache_lock;
990 wait_queue_head_t ino_cache_wait;
991 struct btrfs_free_space_ctl *free_ino_pinned;
992 u64 ino_cache_progress;
993 struct inode *ino_cache_inode;
995 struct mutex log_mutex;
996 wait_queue_head_t log_writer_wait;
997 wait_queue_head_t log_commit_wait[2];
998 struct list_head log_ctxs[2];
999 atomic_t log_writers;
1000 atomic_t log_commit[2];
1003 /* No matter the commit succeeds or not*/
1004 int log_transid_committed;
1005 /* Just be updated when the commit succeeds. */
1006 int last_log_commit;
1007 pid_t log_start_pid;
1013 u64 highest_objectid;
1015 u64 defrag_trans_start;
1016 struct btrfs_key defrag_progress;
1017 struct btrfs_key defrag_max;
1019 /* the dirty list is only used by non-reference counted roots */
1020 struct list_head dirty_list;
1022 struct list_head root_list;
1024 spinlock_t log_extents_lock[2];
1025 struct list_head logged_list[2];
1027 int orphan_cleanup_state;
1029 spinlock_t inode_lock;
1030 /* red-black tree that keeps track of in-memory inodes */
1031 struct rb_root inode_tree;
1034 * radix tree that keeps track of delayed nodes of every inode,
1035 * protected by inode_lock
1037 struct radix_tree_root delayed_nodes_tree;
1039 * right now this just gets used so that a root has its own devid
1040 * for stat. It may be used for more later
1044 spinlock_t root_item_lock;
1047 struct mutex delalloc_mutex;
1048 spinlock_t delalloc_lock;
1050 * all of the inodes that have delalloc bytes. It is possible for
1051 * this list to be empty even when there is still dirty data=ordered
1052 * extents waiting to finish IO.
1054 struct list_head delalloc_inodes;
1055 struct list_head delalloc_root;
1056 u64 nr_delalloc_inodes;
1058 struct mutex ordered_extent_mutex;
1060 * this is used by the balancing code to wait for all the pending
1063 spinlock_t ordered_extent_lock;
1066 * all of the data=ordered extents pending writeback
1067 * these can span multiple transactions and basically include
1068 * every dirty data page that isn't from nodatacow
1070 struct list_head ordered_extents;
1071 struct list_head ordered_root;
1072 u64 nr_ordered_extents;
1075 * Not empty if this subvolume root has gone through tree block swap
1078 * Will be used by reloc_control::dirty_subvol_roots.
1080 struct list_head reloc_dirty_list;
1083 * Number of currently running SEND ioctls to prevent
1084 * manipulation with the read-only status via SUBVOL_SETFLAGS
1086 int send_in_progress;
1088 * Number of currently running deduplication operations that have a
1089 * destination inode belonging to this root. Protected by the lock
1092 int dedupe_in_progress;
1093 struct btrfs_subvolume_writers *subv_writers;
1094 atomic_t will_be_snapshotted;
1095 atomic_t snapshot_force_cow;
1097 /* For qgroup metadata reserved space */
1098 spinlock_t qgroup_meta_rsv_lock;
1099 u64 qgroup_meta_rsv_pertrans;
1100 u64 qgroup_meta_rsv_prealloc;
1102 /* Number of active swapfiles */
1103 atomic_t nr_swapfiles;
1105 /* Record pairs of swapped blocks for qgroup */
1106 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1108 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1113 struct btrfs_clone_extent_info {
1123 struct btrfs_file_private {
1127 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1129 return btrfs_sb(inode->i_sb)->sectorsize;
1132 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1135 return info->nodesize - sizeof(struct btrfs_header);
1138 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1140 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1142 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1145 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1147 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1150 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1151 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1152 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1154 return BTRFS_MAX_ITEM_SIZE(info) -
1155 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1158 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1160 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1164 * Flags for mount options.
1166 * Note: don't forget to add new options to btrfs_show_options()
1168 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1169 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1170 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1171 #define BTRFS_MOUNT_SSD (1 << 3)
1172 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1173 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1174 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1175 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1176 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1177 #define BTRFS_MOUNT_NOSSD (1 << 9)
1178 #define BTRFS_MOUNT_DISCARD (1 << 10)
1179 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1180 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1181 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1182 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1183 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1184 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1185 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1186 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1187 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1188 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1189 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1190 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1191 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1192 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1193 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1194 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1195 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1196 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1198 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1199 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1201 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1202 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1203 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1204 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1207 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1209 if (!btrfs_test_opt(fs_info, opt)) \
1210 btrfs_info(fs_info, fmt, ##args); \
1211 btrfs_set_opt(fs_info->mount_opt, opt); \
1214 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1216 if (btrfs_test_opt(fs_info, opt)) \
1217 btrfs_info(fs_info, fmt, ##args); \
1218 btrfs_clear_opt(fs_info->mount_opt, opt); \
1222 * Requests for changes that need to be done during transaction commit.
1224 * Internal mount options that are used for special handling of the real
1225 * mount options (eg. cannot be set during remount and have to be set during
1226 * transaction commit)
1229 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1230 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1231 #define BTRFS_PENDING_COMMIT (2)
1233 #define btrfs_test_pending(info, opt) \
1234 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1235 #define btrfs_set_pending(info, opt) \
1236 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1237 #define btrfs_clear_pending(info, opt) \
1238 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1241 * Helpers for setting pending mount option changes.
1243 * Expects corresponding macros
1244 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1246 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1248 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1249 btrfs_info((info), fmt, ##args); \
1250 btrfs_set_pending((info), SET_##opt); \
1251 btrfs_clear_pending((info), CLEAR_##opt); \
1255 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1257 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1258 btrfs_info((info), fmt, ##args); \
1259 btrfs_set_pending((info), CLEAR_##opt); \
1260 btrfs_clear_pending((info), SET_##opt); \
1267 #define BTRFS_INODE_NODATASUM (1 << 0)
1268 #define BTRFS_INODE_NODATACOW (1 << 1)
1269 #define BTRFS_INODE_READONLY (1 << 2)
1270 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1271 #define BTRFS_INODE_PREALLOC (1 << 4)
1272 #define BTRFS_INODE_SYNC (1 << 5)
1273 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1274 #define BTRFS_INODE_APPEND (1 << 7)
1275 #define BTRFS_INODE_NODUMP (1 << 8)
1276 #define BTRFS_INODE_NOATIME (1 << 9)
1277 #define BTRFS_INODE_DIRSYNC (1 << 10)
1278 #define BTRFS_INODE_COMPRESS (1 << 11)
1280 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1282 #define BTRFS_INODE_FLAG_MASK \
1283 (BTRFS_INODE_NODATASUM | \
1284 BTRFS_INODE_NODATACOW | \
1285 BTRFS_INODE_READONLY | \
1286 BTRFS_INODE_NOCOMPRESS | \
1287 BTRFS_INODE_PREALLOC | \
1288 BTRFS_INODE_SYNC | \
1289 BTRFS_INODE_IMMUTABLE | \
1290 BTRFS_INODE_APPEND | \
1291 BTRFS_INODE_NODUMP | \
1292 BTRFS_INODE_NOATIME | \
1293 BTRFS_INODE_DIRSYNC | \
1294 BTRFS_INODE_COMPRESS | \
1295 BTRFS_INODE_ROOT_ITEM_INIT)
1297 struct btrfs_map_token {
1298 const struct extent_buffer *eb;
1300 unsigned long offset;
1303 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1304 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1306 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1307 struct extent_buffer *eb)
1310 token->kaddr = NULL;
1313 /* some macros to generate set/get functions for the struct fields. This
1314 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1317 #define le8_to_cpu(v) (v)
1318 #define cpu_to_le8(v) (v)
1321 #define read_eb_member(eb, ptr, type, member, result) (\
1322 read_extent_buffer(eb, (char *)(result), \
1323 ((unsigned long)(ptr)) + \
1324 offsetof(type, member), \
1325 sizeof(((type *)0)->member)))
1327 #define write_eb_member(eb, ptr, type, member, result) (\
1328 write_extent_buffer(eb, (char *)(result), \
1329 ((unsigned long)(ptr)) + \
1330 offsetof(type, member), \
1331 sizeof(((type *)0)->member)))
1333 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1334 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1335 const void *ptr, unsigned long off, \
1336 struct btrfs_map_token *token); \
1337 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1338 unsigned long off, u##bits val, \
1339 struct btrfs_map_token *token); \
1340 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1341 const void *ptr, unsigned long off); \
1342 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1343 unsigned long off, u##bits val);
1345 DECLARE_BTRFS_SETGET_BITS(8)
1346 DECLARE_BTRFS_SETGET_BITS(16)
1347 DECLARE_BTRFS_SETGET_BITS(32)
1348 DECLARE_BTRFS_SETGET_BITS(64)
1350 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1351 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1354 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1355 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1357 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1360 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1361 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1363 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1365 struct btrfs_map_token *token) \
1367 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1368 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1370 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1371 type *s, u##bits val, \
1372 struct btrfs_map_token *token) \
1374 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1375 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1378 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1379 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1381 const type *p = page_address(eb->pages[0]); \
1382 u##bits res = le##bits##_to_cpu(p->member); \
1385 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1388 type *p = page_address(eb->pages[0]); \
1389 p->member = cpu_to_le##bits(val); \
1392 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1393 static inline u##bits btrfs_##name(const type *s) \
1395 return le##bits##_to_cpu(s->member); \
1397 static inline void btrfs_set_##name(type *s, u##bits val) \
1399 s->member = cpu_to_le##bits(val); \
1403 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1404 struct btrfs_dev_item *s)
1406 BUILD_BUG_ON(sizeof(u64) !=
1407 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1408 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1411 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1412 struct btrfs_dev_item *s,
1415 BUILD_BUG_ON(sizeof(u64) !=
1416 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1417 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1418 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1422 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1423 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1424 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1425 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1426 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1428 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1429 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1430 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1431 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1432 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1433 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1435 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1436 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1438 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1440 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1442 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1444 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1446 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1447 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1449 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1451 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1453 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1456 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1458 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1461 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1463 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1466 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1467 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1468 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1469 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1470 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1471 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1472 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1473 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1474 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1475 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1476 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1478 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1480 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1483 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1484 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1485 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1487 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1489 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1491 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1493 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1494 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1496 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1498 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1499 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1501 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1504 unsigned long offset = (unsigned long)c;
1505 offset += offsetof(struct btrfs_chunk, stripe);
1506 offset += nr * sizeof(struct btrfs_stripe);
1507 return (struct btrfs_stripe *)offset;
1510 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1512 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1515 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1516 struct btrfs_chunk *c, int nr)
1518 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1521 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1522 struct btrfs_chunk *c, int nr)
1524 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1527 /* struct btrfs_block_group_item */
1528 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1530 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1532 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1533 struct btrfs_block_group_item, chunk_objectid, 64);
1535 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1536 struct btrfs_block_group_item, chunk_objectid, 64);
1537 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1538 struct btrfs_block_group_item, flags, 64);
1539 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1540 struct btrfs_block_group_item, flags, 64);
1542 /* struct btrfs_free_space_info */
1543 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1545 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1547 /* struct btrfs_inode_ref */
1548 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1549 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1551 /* struct btrfs_inode_extref */
1552 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1553 parent_objectid, 64);
1554 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1556 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1558 /* struct btrfs_inode_item */
1559 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1560 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1561 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1562 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1563 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1564 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1565 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1566 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1567 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1568 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1569 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1570 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1571 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1573 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1575 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1577 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1578 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1580 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1582 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1583 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1584 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1585 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1586 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1587 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1588 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1589 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1590 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1591 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1593 /* struct btrfs_dev_extent */
1594 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1596 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1597 chunk_objectid, 64);
1598 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1600 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1602 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1604 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1605 return (unsigned long)dev + ptr;
1608 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1609 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1611 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1613 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1616 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1618 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1619 struct btrfs_tree_block_info *item,
1620 struct btrfs_disk_key *key)
1622 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1625 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1626 struct btrfs_tree_block_info *item,
1627 struct btrfs_disk_key *key)
1629 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1632 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1634 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1636 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1638 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1641 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1644 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1646 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1649 static inline u32 btrfs_extent_inline_ref_size(int type)
1651 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1652 type == BTRFS_SHARED_BLOCK_REF_KEY)
1653 return sizeof(struct btrfs_extent_inline_ref);
1654 if (type == BTRFS_SHARED_DATA_REF_KEY)
1655 return sizeof(struct btrfs_shared_data_ref) +
1656 sizeof(struct btrfs_extent_inline_ref);
1657 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1658 return sizeof(struct btrfs_extent_data_ref) +
1659 offsetof(struct btrfs_extent_inline_ref, offset);
1663 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1664 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1666 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1667 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1669 /* struct btrfs_node */
1670 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1671 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1672 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1674 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1677 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1680 ptr = offsetof(struct btrfs_node, ptrs) +
1681 sizeof(struct btrfs_key_ptr) * nr;
1682 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1685 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1689 ptr = offsetof(struct btrfs_node, ptrs) +
1690 sizeof(struct btrfs_key_ptr) * nr;
1691 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1694 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1697 ptr = offsetof(struct btrfs_node, ptrs) +
1698 sizeof(struct btrfs_key_ptr) * nr;
1699 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1702 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1706 ptr = offsetof(struct btrfs_node, ptrs) +
1707 sizeof(struct btrfs_key_ptr) * nr;
1708 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1711 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1713 return offsetof(struct btrfs_node, ptrs) +
1714 sizeof(struct btrfs_key_ptr) * nr;
1717 void btrfs_node_key(const struct extent_buffer *eb,
1718 struct btrfs_disk_key *disk_key, int nr);
1720 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1721 struct btrfs_disk_key *disk_key, int nr)
1724 ptr = btrfs_node_key_ptr_offset(nr);
1725 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1726 struct btrfs_key_ptr, key, disk_key);
1729 /* struct btrfs_item */
1730 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1731 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1732 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1733 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1735 static inline unsigned long btrfs_item_nr_offset(int nr)
1737 return offsetof(struct btrfs_leaf, items) +
1738 sizeof(struct btrfs_item) * nr;
1741 static inline struct btrfs_item *btrfs_item_nr(int nr)
1743 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1746 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1747 struct btrfs_item *item)
1749 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1752 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1754 return btrfs_item_end(eb, btrfs_item_nr(nr));
1757 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1759 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1762 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1764 return btrfs_item_size(eb, btrfs_item_nr(nr));
1767 static inline void btrfs_item_key(const struct extent_buffer *eb,
1768 struct btrfs_disk_key *disk_key, int nr)
1770 struct btrfs_item *item = btrfs_item_nr(nr);
1771 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1774 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1775 struct btrfs_disk_key *disk_key, int nr)
1777 struct btrfs_item *item = btrfs_item_nr(nr);
1778 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1781 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1784 * struct btrfs_root_ref
1786 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1787 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1788 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1790 /* struct btrfs_dir_item */
1791 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1792 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1793 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1794 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1795 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1796 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1798 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1800 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1803 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1804 const struct btrfs_dir_item *item,
1805 struct btrfs_disk_key *key)
1807 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1810 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1811 struct btrfs_dir_item *item,
1812 const struct btrfs_disk_key *key)
1814 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1817 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1819 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1821 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1824 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1825 const struct btrfs_free_space_header *h,
1826 struct btrfs_disk_key *key)
1828 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1831 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1832 struct btrfs_free_space_header *h,
1833 const struct btrfs_disk_key *key)
1835 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1838 /* struct btrfs_disk_key */
1839 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1841 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1842 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1844 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1845 const struct btrfs_disk_key *disk)
1847 cpu->offset = le64_to_cpu(disk->offset);
1848 cpu->type = disk->type;
1849 cpu->objectid = le64_to_cpu(disk->objectid);
1852 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1853 const struct btrfs_key *cpu)
1855 disk->offset = cpu_to_le64(cpu->offset);
1856 disk->type = cpu->type;
1857 disk->objectid = cpu_to_le64(cpu->objectid);
1860 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1861 struct btrfs_key *key, int nr)
1863 struct btrfs_disk_key disk_key;
1864 btrfs_node_key(eb, &disk_key, nr);
1865 btrfs_disk_key_to_cpu(key, &disk_key);
1868 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1869 struct btrfs_key *key, int nr)
1871 struct btrfs_disk_key disk_key;
1872 btrfs_item_key(eb, &disk_key, nr);
1873 btrfs_disk_key_to_cpu(key, &disk_key);
1876 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1877 const struct btrfs_dir_item *item,
1878 struct btrfs_key *key)
1880 struct btrfs_disk_key disk_key;
1881 btrfs_dir_item_key(eb, item, &disk_key);
1882 btrfs_disk_key_to_cpu(key, &disk_key);
1885 /* struct btrfs_header */
1886 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1887 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1889 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1890 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1891 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1892 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1893 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1895 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1896 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1898 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1900 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1902 return (btrfs_header_flags(eb) & flag) == flag;
1905 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1907 u64 flags = btrfs_header_flags(eb);
1908 btrfs_set_header_flags(eb, flags | flag);
1911 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1913 u64 flags = btrfs_header_flags(eb);
1914 btrfs_set_header_flags(eb, flags & ~flag);
1917 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1919 u64 flags = btrfs_header_flags(eb);
1920 return flags >> BTRFS_BACKREF_REV_SHIFT;
1923 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1926 u64 flags = btrfs_header_flags(eb);
1927 flags &= ~BTRFS_BACKREF_REV_MASK;
1928 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1929 btrfs_set_header_flags(eb, flags);
1932 static inline unsigned long btrfs_header_fsid(void)
1934 return offsetof(struct btrfs_header, fsid);
1937 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
1939 return offsetof(struct btrfs_header, chunk_tree_uuid);
1942 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1944 return btrfs_header_level(eb) == 0;
1947 /* struct btrfs_root_item */
1948 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1950 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1951 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1952 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1954 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1956 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1957 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1958 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1959 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1960 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1961 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1962 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1963 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1965 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1967 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1969 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1971 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1973 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1976 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
1978 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
1981 static inline bool btrfs_root_dead(const struct btrfs_root *root)
1983 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
1986 /* struct btrfs_root_backup */
1987 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1989 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1991 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1992 tree_root_level, 8);
1994 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1996 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1997 chunk_root_gen, 64);
1998 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1999 chunk_root_level, 8);
2001 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2003 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2004 extent_root_gen, 64);
2005 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2006 extent_root_level, 8);
2008 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2010 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2012 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2015 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2017 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2019 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2022 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2024 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2026 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2027 csum_root_level, 8);
2028 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2030 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2032 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2035 /* struct btrfs_balance_item */
2036 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2038 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2039 const struct btrfs_balance_item *bi,
2040 struct btrfs_disk_balance_args *ba)
2042 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2045 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2046 struct btrfs_balance_item *bi,
2047 const struct btrfs_disk_balance_args *ba)
2049 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2052 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2053 const struct btrfs_balance_item *bi,
2054 struct btrfs_disk_balance_args *ba)
2056 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2059 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2060 struct btrfs_balance_item *bi,
2061 const struct btrfs_disk_balance_args *ba)
2063 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2066 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2067 const struct btrfs_balance_item *bi,
2068 struct btrfs_disk_balance_args *ba)
2070 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2073 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2074 struct btrfs_balance_item *bi,
2075 const struct btrfs_disk_balance_args *ba)
2077 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2081 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2082 const struct btrfs_disk_balance_args *disk)
2084 memset(cpu, 0, sizeof(*cpu));
2086 cpu->profiles = le64_to_cpu(disk->profiles);
2087 cpu->usage = le64_to_cpu(disk->usage);
2088 cpu->devid = le64_to_cpu(disk->devid);
2089 cpu->pstart = le64_to_cpu(disk->pstart);
2090 cpu->pend = le64_to_cpu(disk->pend);
2091 cpu->vstart = le64_to_cpu(disk->vstart);
2092 cpu->vend = le64_to_cpu(disk->vend);
2093 cpu->target = le64_to_cpu(disk->target);
2094 cpu->flags = le64_to_cpu(disk->flags);
2095 cpu->limit = le64_to_cpu(disk->limit);
2096 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2097 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2101 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2102 const struct btrfs_balance_args *cpu)
2104 memset(disk, 0, sizeof(*disk));
2106 disk->profiles = cpu_to_le64(cpu->profiles);
2107 disk->usage = cpu_to_le64(cpu->usage);
2108 disk->devid = cpu_to_le64(cpu->devid);
2109 disk->pstart = cpu_to_le64(cpu->pstart);
2110 disk->pend = cpu_to_le64(cpu->pend);
2111 disk->vstart = cpu_to_le64(cpu->vstart);
2112 disk->vend = cpu_to_le64(cpu->vend);
2113 disk->target = cpu_to_le64(cpu->target);
2114 disk->flags = cpu_to_le64(cpu->flags);
2115 disk->limit = cpu_to_le64(cpu->limit);
2116 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2117 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2120 /* struct btrfs_super_block */
2121 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2122 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2123 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2125 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2126 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2127 struct btrfs_super_block, sys_chunk_array_size, 32);
2128 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2129 struct btrfs_super_block, chunk_root_generation, 64);
2130 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2132 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2134 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2135 chunk_root_level, 8);
2136 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2138 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2139 log_root_transid, 64);
2140 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2142 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2144 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2146 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2148 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2150 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2152 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2153 root_dir_objectid, 64);
2154 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2156 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2158 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2159 compat_ro_flags, 64);
2160 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2161 incompat_flags, 64);
2162 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2164 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2165 cache_generation, 64);
2166 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2167 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2168 uuid_tree_generation, 64);
2170 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2172 u16 t = btrfs_super_csum_type(s);
2174 * csum type is validated at mount time
2176 return btrfs_csum_sizes[t];
2179 static inline const char *btrfs_super_csum_name(u16 csum_type)
2181 /* csum type is validated at mount time */
2182 return btrfs_csum_names[csum_type];
2186 * The leaf data grows from end-to-front in the node.
2187 * this returns the address of the start of the last item,
2188 * which is the stop of the leaf data stack
2190 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2192 u32 nr = btrfs_header_nritems(leaf);
2195 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2196 return btrfs_item_offset_nr(leaf, nr - 1);
2199 /* struct btrfs_file_extent_item */
2200 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2201 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2202 struct btrfs_file_extent_item, disk_bytenr, 64);
2203 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2204 struct btrfs_file_extent_item, offset, 64);
2205 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2206 struct btrfs_file_extent_item, generation, 64);
2207 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2208 struct btrfs_file_extent_item, num_bytes, 64);
2209 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2210 struct btrfs_file_extent_item, disk_num_bytes, 64);
2211 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2212 struct btrfs_file_extent_item, compression, 8);
2214 static inline unsigned long
2215 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2217 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2220 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2222 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2225 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2227 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2229 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2230 disk_num_bytes, 64);
2231 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2233 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2235 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2237 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2239 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2241 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2242 other_encoding, 16);
2245 * this returns the number of bytes used by the item on disk, minus the
2246 * size of any extent headers. If a file is compressed on disk, this is
2247 * the compressed size
2249 static inline u32 btrfs_file_extent_inline_item_len(
2250 const struct extent_buffer *eb,
2251 struct btrfs_item *e)
2253 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2256 /* btrfs_qgroup_status_item */
2257 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2259 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2261 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2263 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2266 /* btrfs_qgroup_info_item */
2267 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2269 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2270 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2272 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2273 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2276 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2277 struct btrfs_qgroup_info_item, generation, 64);
2278 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2280 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2281 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2282 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2284 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2285 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2287 /* btrfs_qgroup_limit_item */
2288 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2290 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2292 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2294 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2296 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2299 /* btrfs_dev_replace_item */
2300 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2301 struct btrfs_dev_replace_item, src_devid, 64);
2302 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2303 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2305 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2307 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2309 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2311 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2312 num_write_errors, 64);
2313 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2314 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2316 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2318 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2321 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2322 struct btrfs_dev_replace_item, src_devid, 64);
2323 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2324 struct btrfs_dev_replace_item,
2325 cont_reading_from_srcdev_mode, 64);
2326 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2327 struct btrfs_dev_replace_item, replace_state, 64);
2328 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2329 struct btrfs_dev_replace_item, time_started, 64);
2330 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2331 struct btrfs_dev_replace_item, time_stopped, 64);
2332 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2333 struct btrfs_dev_replace_item, num_write_errors, 64);
2334 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2335 struct btrfs_dev_replace_item,
2336 num_uncorrectable_read_errors, 64);
2337 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2338 struct btrfs_dev_replace_item, cursor_left, 64);
2339 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2340 struct btrfs_dev_replace_item, cursor_right, 64);
2342 /* helper function to cast into the data area of the leaf. */
2343 #define btrfs_item_ptr(leaf, slot, type) \
2344 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2345 btrfs_item_offset_nr(leaf, slot)))
2347 #define btrfs_item_ptr_offset(leaf, slot) \
2348 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2349 btrfs_item_offset_nr(leaf, slot)))
2351 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2353 return crc32c(crc, address, length);
2356 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2358 put_unaligned_le32(~crc, result);
2361 static inline u64 btrfs_name_hash(const char *name, int len)
2363 return crc32c((u32)~1, name, len);
2367 * Figure the key offset of an extended inode ref
2369 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2372 return (u64) crc32c(parent_objectid, name, len);
2375 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2377 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2382 enum btrfs_inline_ref_type {
2383 BTRFS_REF_TYPE_INVALID,
2384 BTRFS_REF_TYPE_BLOCK,
2385 BTRFS_REF_TYPE_DATA,
2389 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2390 struct btrfs_extent_inline_ref *iref,
2391 enum btrfs_inline_ref_type is_data);
2392 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2394 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2397 * Use this if we would be adding new items, as we could split nodes as we cow
2400 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2403 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2407 * Doing a truncate or a modification won't result in new nodes or leaves, just
2408 * what we need for COW.
2410 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2413 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2416 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2417 u64 start, u64 num_bytes);
2418 void btrfs_free_excluded_extents(struct btrfs_block_group_cache *cache);
2419 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2420 unsigned long count);
2421 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2422 struct btrfs_delayed_ref_root *delayed_refs,
2423 struct btrfs_delayed_ref_head *head);
2424 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2425 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2426 struct btrfs_fs_info *fs_info, u64 bytenr,
2427 u64 offset, int metadata, u64 *refs, u64 *flags);
2428 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2429 u64 bytenr, u64 num, int reserved);
2430 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2431 u64 bytenr, u64 num_bytes);
2432 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2433 int btrfs_cross_ref_exist(struct btrfs_root *root,
2434 u64 objectid, u64 offset, u64 bytenr);
2435 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2436 struct btrfs_root *root,
2437 u64 parent, u64 root_objectid,
2438 const struct btrfs_disk_key *key,
2439 int level, u64 hint,
2441 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2442 struct btrfs_root *root,
2443 struct extent_buffer *buf,
2444 u64 parent, int last_ref);
2445 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2446 struct btrfs_root *root, u64 owner,
2447 u64 offset, u64 ram_bytes,
2448 struct btrfs_key *ins);
2449 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2450 u64 root_objectid, u64 owner, u64 offset,
2451 struct btrfs_key *ins);
2452 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2453 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2454 struct btrfs_key *ins, int is_data, int delalloc);
2455 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2456 struct extent_buffer *buf, int full_backref);
2457 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2458 struct extent_buffer *buf, int full_backref);
2459 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2460 u64 bytenr, u64 num_bytes, u64 flags,
2461 int level, int is_data);
2462 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2464 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2465 u64 start, u64 len, int delalloc);
2466 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2467 u64 start, u64 len);
2468 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2469 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2470 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2471 struct btrfs_ref *generic_ref);
2473 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2474 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2475 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2476 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2478 enum btrfs_reserve_flush_enum {
2479 /* If we are in the transaction, we can't flush anything.*/
2480 BTRFS_RESERVE_NO_FLUSH,
2482 * Flushing delalloc may cause deadlock somewhere, in this
2483 * case, use FLUSH LIMIT
2485 BTRFS_RESERVE_FLUSH_LIMIT,
2486 BTRFS_RESERVE_FLUSH_EVICT,
2487 BTRFS_RESERVE_FLUSH_ALL,
2490 enum btrfs_flush_state {
2491 FLUSH_DELAYED_ITEMS_NR = 1,
2492 FLUSH_DELAYED_ITEMS = 2,
2493 FLUSH_DELAYED_REFS_NR = 3,
2494 FLUSH_DELAYED_REFS = 4,
2496 FLUSH_DELALLOC_WAIT = 6,
2498 ALLOC_CHUNK_FORCE = 8,
2499 RUN_DELAYED_IPUTS = 9,
2503 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2504 struct btrfs_block_rsv *rsv,
2505 int nitems, bool use_global_rsv);
2506 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2507 struct btrfs_block_rsv *rsv);
2508 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2511 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2512 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2513 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2514 u64 start, u64 end);
2515 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2516 u64 num_bytes, u64 *actual_bytes);
2517 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2519 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2520 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2521 struct btrfs_fs_info *fs_info);
2522 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2523 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2524 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2527 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2528 int level, int *slot);
2529 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2530 int btrfs_previous_item(struct btrfs_root *root,
2531 struct btrfs_path *path, u64 min_objectid,
2533 int btrfs_previous_extent_item(struct btrfs_root *root,
2534 struct btrfs_path *path, u64 min_objectid);
2535 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2536 struct btrfs_path *path,
2537 const struct btrfs_key *new_key);
2538 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2539 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2540 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2541 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2542 struct btrfs_key *key, int lowest_level,
2544 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2545 struct btrfs_path *path,
2547 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2550 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2551 struct btrfs_root *root, struct extent_buffer *buf,
2552 struct extent_buffer *parent, int parent_slot,
2553 struct extent_buffer **cow_ret);
2554 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2555 struct btrfs_root *root,
2556 struct extent_buffer *buf,
2557 struct extent_buffer **cow_ret, u64 new_root_objectid);
2558 int btrfs_block_can_be_shared(struct btrfs_root *root,
2559 struct extent_buffer *buf);
2560 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2561 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2562 int btrfs_split_item(struct btrfs_trans_handle *trans,
2563 struct btrfs_root *root,
2564 struct btrfs_path *path,
2565 const struct btrfs_key *new_key,
2566 unsigned long split_offset);
2567 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2568 struct btrfs_root *root,
2569 struct btrfs_path *path,
2570 const struct btrfs_key *new_key);
2571 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2572 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2573 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2574 const struct btrfs_key *key, struct btrfs_path *p,
2575 int ins_len, int cow);
2576 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2577 struct btrfs_path *p, u64 time_seq);
2578 int btrfs_search_slot_for_read(struct btrfs_root *root,
2579 const struct btrfs_key *key,
2580 struct btrfs_path *p, int find_higher,
2582 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2583 struct btrfs_root *root, struct extent_buffer *parent,
2584 int start_slot, u64 *last_ret,
2585 struct btrfs_key *progress);
2586 void btrfs_release_path(struct btrfs_path *p);
2587 struct btrfs_path *btrfs_alloc_path(void);
2588 void btrfs_free_path(struct btrfs_path *p);
2589 void btrfs_set_path_blocking(struct btrfs_path *p);
2590 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2592 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2593 struct btrfs_path *path, int slot, int nr);
2594 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2595 struct btrfs_root *root,
2596 struct btrfs_path *path)
2598 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2601 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2602 const struct btrfs_key *cpu_key, u32 *data_size,
2603 u32 total_data, u32 total_size, int nr);
2604 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2605 const struct btrfs_key *key, void *data, u32 data_size);
2606 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2607 struct btrfs_root *root,
2608 struct btrfs_path *path,
2609 const struct btrfs_key *cpu_key, u32 *data_size,
2612 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2613 struct btrfs_root *root,
2614 struct btrfs_path *path,
2615 const struct btrfs_key *key,
2618 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2621 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2622 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2623 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2625 static inline int btrfs_next_old_item(struct btrfs_root *root,
2626 struct btrfs_path *p, u64 time_seq)
2629 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2630 return btrfs_next_old_leaf(root, p, time_seq);
2633 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2635 return btrfs_next_old_item(root, p, 0);
2637 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2638 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2639 struct btrfs_block_rsv *block_rsv,
2640 int update_ref, int for_reloc);
2641 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2642 struct btrfs_root *root,
2643 struct extent_buffer *node,
2644 struct extent_buffer *parent);
2645 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2648 * Do it this way so we only ever do one test_bit in the normal case.
2650 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2651 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2659 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2660 * anything except sleeping. This function is used to check the status of
2663 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2665 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2668 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2670 kfree(fs_info->balance_ctl);
2671 kfree(fs_info->delayed_root);
2672 kfree(fs_info->extent_root);
2673 kfree(fs_info->tree_root);
2674 kfree(fs_info->chunk_root);
2675 kfree(fs_info->dev_root);
2676 kfree(fs_info->csum_root);
2677 kfree(fs_info->quota_root);
2678 kfree(fs_info->uuid_root);
2679 kfree(fs_info->free_space_root);
2680 kfree(fs_info->super_copy);
2681 kfree(fs_info->super_for_commit);
2685 /* tree mod log functions from ctree.c */
2686 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2687 struct seq_list *elem);
2688 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2689 struct seq_list *elem);
2690 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2693 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2694 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2696 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2697 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2699 int btrfs_del_root(struct btrfs_trans_handle *trans,
2700 const struct btrfs_key *key);
2701 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2702 const struct btrfs_key *key,
2703 struct btrfs_root_item *item);
2704 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2705 struct btrfs_root *root,
2706 struct btrfs_key *key,
2707 struct btrfs_root_item *item);
2708 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2709 struct btrfs_path *path, struct btrfs_root_item *root_item,
2710 struct btrfs_key *root_key);
2711 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2712 void btrfs_set_root_node(struct btrfs_root_item *item,
2713 struct extent_buffer *node);
2714 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2715 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2716 struct btrfs_root *root);
2719 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2721 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2723 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2724 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2728 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2729 const char *name, int name_len);
2730 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2731 int name_len, struct btrfs_inode *dir,
2732 struct btrfs_key *location, u8 type, u64 index);
2733 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2734 struct btrfs_root *root,
2735 struct btrfs_path *path, u64 dir,
2736 const char *name, int name_len,
2738 struct btrfs_dir_item *
2739 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2740 struct btrfs_root *root,
2741 struct btrfs_path *path, u64 dir,
2742 u64 objectid, const char *name, int name_len,
2744 struct btrfs_dir_item *
2745 btrfs_search_dir_index_item(struct btrfs_root *root,
2746 struct btrfs_path *path, u64 dirid,
2747 const char *name, int name_len);
2748 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2749 struct btrfs_root *root,
2750 struct btrfs_path *path,
2751 struct btrfs_dir_item *di);
2752 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2753 struct btrfs_root *root,
2754 struct btrfs_path *path, u64 objectid,
2755 const char *name, u16 name_len,
2756 const void *data, u16 data_len);
2757 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2758 struct btrfs_root *root,
2759 struct btrfs_path *path, u64 dir,
2760 const char *name, u16 name_len,
2762 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2763 struct btrfs_path *path,
2768 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2769 struct btrfs_root *root, u64 offset);
2770 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2771 struct btrfs_root *root, u64 offset);
2772 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2775 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2776 struct btrfs_root *root,
2777 const char *name, int name_len,
2778 u64 inode_objectid, u64 ref_objectid, u64 index);
2779 int btrfs_del_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_insert_empty_inode(struct btrfs_trans_handle *trans,
2784 struct btrfs_root *root,
2785 struct btrfs_path *path, u64 objectid);
2786 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2787 *root, struct btrfs_path *path,
2788 struct btrfs_key *location, int mod);
2790 struct btrfs_inode_extref *
2791 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2792 struct btrfs_root *root,
2793 struct btrfs_path *path,
2794 const char *name, int name_len,
2795 u64 inode_objectid, u64 ref_objectid, int ins_len,
2798 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2799 int slot, const char *name,
2801 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2802 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2803 const char *name, int name_len);
2805 struct btrfs_dio_private;
2806 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2807 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2808 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2810 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
2811 u64 logical_offset);
2812 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2813 struct btrfs_root *root,
2814 u64 objectid, u64 pos,
2815 u64 disk_offset, u64 disk_num_bytes,
2816 u64 num_bytes, u64 offset, u64 ram_bytes,
2817 u8 compression, u8 encryption, u16 other_encoding);
2818 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2819 struct btrfs_root *root,
2820 struct btrfs_path *path, u64 objectid,
2821 u64 bytenr, int mod);
2822 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2823 struct btrfs_root *root,
2824 struct btrfs_ordered_sum *sums);
2825 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2826 u64 file_start, int contig);
2827 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2828 struct list_head *list, int search_commit);
2829 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2830 const struct btrfs_path *path,
2831 struct btrfs_file_extent_item *fi,
2832 const bool new_inline,
2833 struct extent_map *em);
2836 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2837 u64 start, u64 len);
2838 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2839 u64 *orig_start, u64 *orig_block_len,
2842 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2843 struct btrfs_inode *inode);
2844 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2845 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2846 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2847 struct btrfs_root *root,
2848 struct btrfs_inode *dir, struct btrfs_inode *inode,
2849 const char *name, int name_len);
2850 int btrfs_add_link(struct btrfs_trans_handle *trans,
2851 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2852 const char *name, int name_len, int add_backref, u64 index);
2853 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2854 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2856 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2857 struct btrfs_root *root,
2858 struct inode *inode, u64 new_size,
2861 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2862 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2863 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2864 unsigned int extra_bits,
2865 struct extent_state **cached_state);
2866 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2867 struct btrfs_root *new_root,
2868 struct btrfs_root *parent_root,
2870 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2872 void btrfs_clear_delalloc_extent(struct inode *inode,
2873 struct extent_state *state, unsigned *bits);
2874 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2875 struct extent_state *other);
2876 void btrfs_split_delalloc_extent(struct inode *inode,
2877 struct extent_state *orig, u64 split);
2878 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2879 unsigned long bio_flags);
2880 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2881 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2882 int btrfs_readpage(struct file *file, struct page *page);
2883 void btrfs_evict_inode(struct inode *inode);
2884 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2885 struct inode *btrfs_alloc_inode(struct super_block *sb);
2886 void btrfs_destroy_inode(struct inode *inode);
2887 void btrfs_free_inode(struct inode *inode);
2888 int btrfs_drop_inode(struct inode *inode);
2889 int __init btrfs_init_cachep(void);
2890 void __cold btrfs_destroy_cachep(void);
2891 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2892 struct btrfs_root *root, int *new,
2893 struct btrfs_path *path);
2894 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2895 struct btrfs_root *root, int *was_new);
2896 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2897 struct page *page, size_t pg_offset,
2898 u64 start, u64 end, int create);
2899 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2900 struct btrfs_root *root,
2901 struct inode *inode);
2902 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2903 struct btrfs_root *root, struct inode *inode);
2904 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2905 struct btrfs_inode *inode);
2906 int btrfs_orphan_cleanup(struct btrfs_root *root);
2907 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2908 void btrfs_add_delayed_iput(struct inode *inode);
2909 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2910 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2911 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2912 u64 start, u64 num_bytes, u64 min_size,
2913 loff_t actual_len, u64 *alloc_hint);
2914 int btrfs_prealloc_file_range_trans(struct inode *inode,
2915 struct btrfs_trans_handle *trans, int mode,
2916 u64 start, u64 num_bytes, u64 min_size,
2917 loff_t actual_len, u64 *alloc_hint);
2918 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2919 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2920 struct writeback_control *wbc);
2921 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2922 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2923 u64 end, int uptodate);
2924 extern const struct dentry_operations btrfs_dentry_operations;
2927 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2928 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2929 int btrfs_ioctl_get_supported_features(void __user *arg);
2930 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2931 int btrfs_is_empty_uuid(u8 *uuid);
2932 int btrfs_defrag_file(struct inode *inode, struct file *file,
2933 struct btrfs_ioctl_defrag_range_args *range,
2934 u64 newer_than, unsigned long max_pages);
2935 void btrfs_get_block_group_info(struct list_head *groups_list,
2936 struct btrfs_ioctl_space_info *space);
2937 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2938 struct btrfs_ioctl_balance_args *bargs);
2941 int __init btrfs_auto_defrag_init(void);
2942 void __cold btrfs_auto_defrag_exit(void);
2943 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2944 struct btrfs_inode *inode);
2945 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2946 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2947 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2948 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2950 extern const struct file_operations btrfs_file_operations;
2951 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2952 struct btrfs_root *root, struct inode *inode,
2953 struct btrfs_path *path, u64 start, u64 end,
2954 u64 *drop_end, int drop_cache,
2956 u32 extent_item_size,
2958 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2959 struct btrfs_root *root, struct inode *inode, u64 start,
2960 u64 end, int drop_cache);
2961 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2962 const u64 start, const u64 end,
2963 struct btrfs_clone_extent_info *clone_info,
2964 struct btrfs_trans_handle **trans_out);
2965 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2966 struct btrfs_inode *inode, u64 start, u64 end);
2967 int btrfs_release_file(struct inode *inode, struct file *file);
2968 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2969 size_t num_pages, loff_t pos, size_t write_bytes,
2970 struct extent_state **cached);
2971 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2972 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
2973 struct file *file_out, loff_t pos_out,
2974 loff_t len, unsigned int remap_flags);
2977 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2978 struct btrfs_root *root);
2981 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
2982 unsigned long new_flags);
2983 int btrfs_sync_fs(struct super_block *sb, int wait);
2985 static inline __printf(2, 3) __cold
2986 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
2990 #ifdef CONFIG_PRINTK
2993 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
2995 #define btrfs_printk(fs_info, fmt, args...) \
2996 btrfs_no_printk(fs_info, fmt, ##args)
2999 #define btrfs_emerg(fs_info, fmt, args...) \
3000 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3001 #define btrfs_alert(fs_info, fmt, args...) \
3002 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3003 #define btrfs_crit(fs_info, fmt, args...) \
3004 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3005 #define btrfs_err(fs_info, fmt, args...) \
3006 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3007 #define btrfs_warn(fs_info, fmt, args...) \
3008 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3009 #define btrfs_notice(fs_info, fmt, args...) \
3010 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3011 #define btrfs_info(fs_info, fmt, args...) \
3012 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3015 * Wrappers that use printk_in_rcu
3017 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3018 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3019 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3020 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3021 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3022 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3023 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3024 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3025 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3026 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3027 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3028 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3029 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3030 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3033 * Wrappers that use a ratelimited printk_in_rcu
3035 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3036 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3037 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3038 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3039 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3040 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3041 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3042 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3043 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3044 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3045 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3046 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3047 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3048 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3051 * Wrappers that use a ratelimited printk
3053 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3054 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3055 #define btrfs_alert_rl(fs_info, fmt, args...) \
3056 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3057 #define btrfs_crit_rl(fs_info, fmt, args...) \
3058 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3059 #define btrfs_err_rl(fs_info, fmt, args...) \
3060 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3061 #define btrfs_warn_rl(fs_info, fmt, args...) \
3062 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3063 #define btrfs_notice_rl(fs_info, fmt, args...) \
3064 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3065 #define btrfs_info_rl(fs_info, fmt, args...) \
3066 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3068 #if defined(CONFIG_DYNAMIC_DEBUG)
3069 #define btrfs_debug(fs_info, fmt, args...) \
3070 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3071 fs_info, KERN_DEBUG fmt, ##args)
3072 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3073 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3074 fs_info, KERN_DEBUG fmt, ##args)
3075 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3076 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3077 fs_info, KERN_DEBUG fmt, ##args)
3078 #define btrfs_debug_rl(fs_info, fmt, args...) \
3079 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3080 fs_info, KERN_DEBUG fmt, ##args)
3081 #elif defined(DEBUG)
3082 #define btrfs_debug(fs_info, fmt, args...) \
3083 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3084 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3085 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3086 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3087 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3088 #define btrfs_debug_rl(fs_info, fmt, args...) \
3089 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3091 #define btrfs_debug(fs_info, fmt, args...) \
3092 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3093 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3094 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3095 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3096 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3097 #define btrfs_debug_rl(fs_info, fmt, args...) \
3098 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3101 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3104 btrfs_printk(fs_info, fmt, ##args); \
3105 rcu_read_unlock(); \
3108 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3111 btrfs_no_printk(fs_info, fmt, ##args); \
3112 rcu_read_unlock(); \
3115 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3117 static DEFINE_RATELIMIT_STATE(_rs, \
3118 DEFAULT_RATELIMIT_INTERVAL, \
3119 DEFAULT_RATELIMIT_BURST); \
3120 if (__ratelimit(&_rs)) \
3121 btrfs_printk(fs_info, fmt, ##args); \
3124 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3127 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3128 rcu_read_unlock(); \
3132 static inline void assfail(const char *expr, const char *file, int line)
3134 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3135 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3140 #define ASSERT(expr) \
3141 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3144 * Use that for functions that are conditionally exported for sanity tests but
3147 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3148 #define EXPORT_FOR_TESTS static
3150 #define EXPORT_FOR_TESTS
3154 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3157 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3162 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3163 unsigned int line, int errno, const char *fmt, ...);
3165 const char *btrfs_decode_error(int errno);
3168 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3169 const char *function,
3170 unsigned int line, int errno);
3173 * Call btrfs_abort_transaction as early as possible when an error condition is
3174 * detected, that way the exact line number is reported.
3176 #define btrfs_abort_transaction(trans, errno) \
3178 /* Report first abort since mount */ \
3179 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3180 &((trans)->fs_info->fs_state))) { \
3181 if ((errno) != -EIO) { \
3182 WARN(1, KERN_DEBUG \
3183 "BTRFS: Transaction aborted (error %d)\n", \
3186 btrfs_debug((trans)->fs_info, \
3187 "Transaction aborted (error %d)", \
3191 __btrfs_abort_transaction((trans), __func__, \
3192 __LINE__, (errno)); \
3195 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3197 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3198 (errno), fmt, ##args); \
3203 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3204 unsigned int line, int errno, const char *fmt, ...);
3206 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3207 * will panic(). Otherwise we BUG() here.
3209 #define btrfs_panic(fs_info, errno, fmt, args...) \
3211 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3216 /* compatibility and incompatibility defines */
3218 #define btrfs_set_fs_incompat(__fs_info, opt) \
3219 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3222 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3223 u64 flag, const char* name)
3225 struct btrfs_super_block *disk_super;
3228 disk_super = fs_info->super_copy;
3229 features = btrfs_super_incompat_flags(disk_super);
3230 if (!(features & flag)) {
3231 spin_lock(&fs_info->super_lock);
3232 features = btrfs_super_incompat_flags(disk_super);
3233 if (!(features & flag)) {
3235 btrfs_set_super_incompat_flags(disk_super, features);
3237 "setting incompat feature flag for %s (0x%llx)",
3240 spin_unlock(&fs_info->super_lock);
3244 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3245 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3248 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3249 u64 flag, const char* name)
3251 struct btrfs_super_block *disk_super;
3254 disk_super = fs_info->super_copy;
3255 features = btrfs_super_incompat_flags(disk_super);
3256 if (features & flag) {
3257 spin_lock(&fs_info->super_lock);
3258 features = btrfs_super_incompat_flags(disk_super);
3259 if (features & flag) {
3261 btrfs_set_super_incompat_flags(disk_super, features);
3263 "clearing incompat feature flag for %s (0x%llx)",
3266 spin_unlock(&fs_info->super_lock);
3270 #define btrfs_fs_incompat(fs_info, opt) \
3271 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3273 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3275 struct btrfs_super_block *disk_super;
3276 disk_super = fs_info->super_copy;
3277 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3280 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3281 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3284 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3285 u64 flag, const char *name)
3287 struct btrfs_super_block *disk_super;
3290 disk_super = fs_info->super_copy;
3291 features = btrfs_super_compat_ro_flags(disk_super);
3292 if (!(features & flag)) {
3293 spin_lock(&fs_info->super_lock);
3294 features = btrfs_super_compat_ro_flags(disk_super);
3295 if (!(features & flag)) {
3297 btrfs_set_super_compat_ro_flags(disk_super, features);
3299 "setting compat-ro feature flag for %s (0x%llx)",
3302 spin_unlock(&fs_info->super_lock);
3306 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3307 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3310 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3311 u64 flag, const char *name)
3313 struct btrfs_super_block *disk_super;
3316 disk_super = fs_info->super_copy;
3317 features = btrfs_super_compat_ro_flags(disk_super);
3318 if (features & flag) {
3319 spin_lock(&fs_info->super_lock);
3320 features = btrfs_super_compat_ro_flags(disk_super);
3321 if (features & flag) {
3323 btrfs_set_super_compat_ro_flags(disk_super, features);
3325 "clearing compat-ro feature flag for %s (0x%llx)",
3328 spin_unlock(&fs_info->super_lock);
3332 #define btrfs_fs_compat_ro(fs_info, opt) \
3333 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3335 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3337 struct btrfs_super_block *disk_super;
3338 disk_super = fs_info->super_copy;
3339 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3343 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3344 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3345 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3346 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3347 struct inode *inode, struct inode *dir);
3349 #define btrfs_get_acl NULL
3350 #define btrfs_set_acl NULL
3351 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3352 struct inode *inode, struct inode *dir)
3359 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3360 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3361 struct btrfs_root *root);
3362 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3363 struct btrfs_root *root);
3364 int btrfs_recover_relocation(struct btrfs_root *root);
3365 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3366 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3367 struct btrfs_root *root, struct extent_buffer *buf,
3368 struct extent_buffer *cow);
3369 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3370 u64 *bytes_to_reserve);
3371 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3372 struct btrfs_pending_snapshot *pending);
3375 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3376 u64 end, struct btrfs_scrub_progress *progress,
3377 int readonly, int is_dev_replace);
3378 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3379 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3380 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3381 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3382 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3383 struct btrfs_scrub_progress *progress);
3384 static inline void btrfs_init_full_stripe_locks_tree(
3385 struct btrfs_full_stripe_locks_tree *locks_root)
3387 locks_root->root = RB_ROOT;
3388 mutex_init(&locks_root->lock);
3392 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3393 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3394 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3396 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3398 btrfs_bio_counter_sub(fs_info, 1);
3402 struct reada_control {
3403 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3404 struct btrfs_key key_start;
3405 struct btrfs_key key_end; /* exclusive */
3408 wait_queue_head_t wait;
3410 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3411 struct btrfs_key *start, struct btrfs_key *end);
3412 int btrfs_reada_wait(void *handle);
3413 void btrfs_reada_detach(void *handle);
3414 int btree_readahead_hook(struct extent_buffer *eb, int err);
3416 static inline int is_fstree(u64 rootid)
3418 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3419 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3420 !btrfs_qgroup_level(rootid)))
3425 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3427 return signal_pending(current);
3430 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3432 /* Sanity test specific functions */
3433 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3434 void btrfs_test_inode_set_ops(struct inode *inode);
3435 void btrfs_test_destroy_inode(struct inode *inode);
3437 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3439 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3442 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)