1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
37 struct btrfs_trans_handle;
38 struct btrfs_transaction;
39 struct btrfs_pending_snapshot;
40 struct btrfs_delayed_ref_root;
41 struct btrfs_space_info;
42 struct btrfs_block_group;
43 extern struct kmem_cache *btrfs_trans_handle_cachep;
44 extern struct kmem_cache *btrfs_bit_radix_cachep;
45 extern struct kmem_cache *btrfs_path_cachep;
46 extern struct kmem_cache *btrfs_free_space_cachep;
47 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
48 struct btrfs_ordered_sum;
51 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
54 * Maximum number of mirrors that can be available for all profiles counting
55 * the target device of dev-replace as one. During an active device replace
56 * procedure, the target device of the copy operation is a mirror for the
57 * filesystem data as well that can be used to read data in order to repair
58 * read errors on other disks.
60 * Current value is derived from RAID1C4 with 4 copies.
62 #define BTRFS_MAX_MIRRORS (4 + 1)
64 #define BTRFS_MAX_LEVEL 8
66 #define BTRFS_OLDEST_GENERATION 0ULL
69 * the max metadata block size. This limit is somewhat artificial,
70 * but the memmove costs go through the roof for larger blocks.
72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
75 * we can actually store much bigger names, but lets not confuse the rest
78 #define BTRFS_NAME_LEN 255
81 * Theoretical limit is larger, but we keep this down to a sane
82 * value. That should limit greatly the possibility of collisions on
85 #define BTRFS_LINK_MAX 65535U
87 #define BTRFS_EMPTY_DIR_SIZE 0
89 /* ioprio of readahead is set to idle */
90 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
92 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
95 * Use large batch size to reduce overhead of metadata updates. On the reader
96 * side, we only read it when we are close to ENOSPC and the read overhead is
97 * mostly related to the number of CPUs, so it is OK to use arbitrary large
100 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
106 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
108 static inline u32 count_max_extents(u64 size)
110 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
113 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
115 BUG_ON(num_stripes == 0);
116 return sizeof(struct btrfs_chunk) +
117 sizeof(struct btrfs_stripe) * (num_stripes - 1);
121 * Runtime (in-memory) states of filesystem
124 /* Global indicator of serious filesystem errors */
125 BTRFS_FS_STATE_ERROR,
127 * Filesystem is being remounted, allow to skip some operations, like
130 BTRFS_FS_STATE_REMOUNTING,
131 /* Track if a transaction abort has been reported on this filesystem */
132 BTRFS_FS_STATE_TRANS_ABORTED,
134 * Bio operations should be blocked on this filesystem because a source
135 * or target device is being destroyed as part of a device replace
137 BTRFS_FS_STATE_DEV_REPLACING,
138 /* The btrfs_fs_info created for self-tests */
139 BTRFS_FS_STATE_DUMMY_FS_INFO,
142 #define BTRFS_BACKREF_REV_MAX 256
143 #define BTRFS_BACKREF_REV_SHIFT 56
144 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
145 BTRFS_BACKREF_REV_SHIFT)
147 #define BTRFS_OLD_BACKREF_REV 0
148 #define BTRFS_MIXED_BACKREF_REV 1
151 * every tree block (leaf or node) starts with this header.
153 struct btrfs_header {
154 /* these first four must match the super block */
155 u8 csum[BTRFS_CSUM_SIZE];
156 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
157 __le64 bytenr; /* which block this node is supposed to live in */
160 /* allowed to be different from the super from here on down */
161 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
166 } __attribute__ ((__packed__));
169 * this is a very generous portion of the super block, giving us
170 * room to translate 14 chunks with 3 stripes each.
172 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
175 * just in case we somehow lose the roots and are not able to mount,
176 * we store an array of the roots from previous transactions
179 #define BTRFS_NUM_BACKUP_ROOTS 4
180 struct btrfs_root_backup {
182 __le64 tree_root_gen;
185 __le64 chunk_root_gen;
188 __le64 extent_root_gen;
197 __le64 csum_root_gen;
207 u8 extent_root_level;
211 /* future and to align */
213 } __attribute__ ((__packed__));
216 * the super block basically lists the main trees of the FS
217 * it currently lacks any block count etc etc
219 struct btrfs_super_block {
220 /* the first 4 fields must match struct btrfs_header */
221 u8 csum[BTRFS_CSUM_SIZE];
222 /* FS specific UUID, visible to user */
223 u8 fsid[BTRFS_FSID_SIZE];
224 __le64 bytenr; /* this block number */
227 /* allowed to be different from the btrfs_header from here own down */
234 /* this will help find the new super based on the log root */
235 __le64 log_root_transid;
238 __le64 root_dir_objectid;
242 __le32 __unused_leafsize;
244 __le32 sys_chunk_array_size;
245 __le64 chunk_root_generation;
247 __le64 compat_ro_flags;
248 __le64 incompat_flags;
253 struct btrfs_dev_item dev_item;
255 char label[BTRFS_LABEL_SIZE];
257 __le64 cache_generation;
258 __le64 uuid_tree_generation;
260 /* the UUID written into btree blocks */
261 u8 metadata_uuid[BTRFS_FSID_SIZE];
263 /* future expansion */
265 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
266 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
267 } __attribute__ ((__packed__));
270 * Compat flags that we support. If any incompat flags are set other than the
271 * ones specified below then we will fail to mount
273 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
274 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
275 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
277 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
278 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
279 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
281 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
282 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
284 #define BTRFS_FEATURE_INCOMPAT_SUPP \
285 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
286 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
287 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
288 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
289 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
290 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
291 BTRFS_FEATURE_INCOMPAT_RAID56 | \
292 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
293 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
294 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
295 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
296 BTRFS_FEATURE_INCOMPAT_RAID1C34)
298 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
299 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
300 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
303 * A leaf is full of items. offset and size tell us where to find
304 * the item in the leaf (relative to the start of the data area)
307 struct btrfs_disk_key key;
310 } __attribute__ ((__packed__));
313 * leaves have an item area and a data area:
314 * [item0, item1....itemN] [free space] [dataN...data1, data0]
316 * The data is separate from the items to get the keys closer together
320 struct btrfs_header header;
321 struct btrfs_item items[];
322 } __attribute__ ((__packed__));
325 * all non-leaf blocks are nodes, they hold only keys and pointers to
328 struct btrfs_key_ptr {
329 struct btrfs_disk_key key;
332 } __attribute__ ((__packed__));
335 struct btrfs_header header;
336 struct btrfs_key_ptr ptrs[];
337 } __attribute__ ((__packed__));
340 * btrfs_paths remember the path taken from the root down to the leaf.
341 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
342 * to any other levels that are present.
344 * The slots array records the index of the item or block pointer
345 * used while walking the tree.
347 enum { READA_NONE, READA_BACK, READA_FORWARD };
349 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
350 int slots[BTRFS_MAX_LEVEL];
351 /* if there is real range locking, this locks field will change */
352 u8 locks[BTRFS_MAX_LEVEL];
354 /* keep some upper locks as we walk down */
358 * set by btrfs_split_item, tells search_slot to keep all locks
359 * and to force calls to keep space in the nodes
361 unsigned int search_for_split:1;
362 unsigned int keep_locks:1;
363 unsigned int skip_locking:1;
364 unsigned int leave_spinning:1;
365 unsigned int search_commit_root:1;
366 unsigned int need_commit_sem:1;
367 unsigned int skip_release_on_error:1;
369 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
370 sizeof(struct btrfs_item))
371 struct btrfs_dev_replace {
372 u64 replace_state; /* see #define above */
373 time64_t time_started; /* seconds since 1-Jan-1970 */
374 time64_t time_stopped; /* seconds since 1-Jan-1970 */
375 atomic64_t num_write_errors;
376 atomic64_t num_uncorrectable_read_errors;
379 u64 committed_cursor_left;
380 u64 cursor_left_last_write_of_item;
383 u64 cont_reading_from_srcdev_mode; /* see #define above */
386 int item_needs_writeback;
387 struct btrfs_device *srcdev;
388 struct btrfs_device *tgtdev;
390 struct mutex lock_finishing_cancel_unmount;
391 struct rw_semaphore rwsem;
393 struct btrfs_scrub_progress scrub_progress;
395 struct percpu_counter bio_counter;
396 wait_queue_head_t replace_wait;
400 * free clusters are used to claim free space in relatively large chunks,
401 * allowing us to do less seeky writes. They are used for all metadata
402 * allocations. In ssd_spread mode they are also used for data allocations.
404 struct btrfs_free_cluster {
406 spinlock_t refill_lock;
409 /* largest extent in this cluster */
412 /* first extent starting offset */
415 /* We did a full search and couldn't create a cluster */
418 struct btrfs_block_group *block_group;
420 * when a cluster is allocated from a block group, we put the
421 * cluster onto a list in the block group so that it can
422 * be freed before the block group is freed.
424 struct list_head block_group_list;
427 enum btrfs_caching_type {
431 BTRFS_CACHE_FINISHED,
436 * Tree to record all locked full stripes of a RAID5/6 block group
438 struct btrfs_full_stripe_locks_tree {
443 /* delayed seq elem */
445 struct list_head list;
449 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
451 #define SEQ_LAST ((u64)-1)
453 enum btrfs_orphan_cleanup_state {
454 ORPHAN_CLEANUP_STARTED = 1,
455 ORPHAN_CLEANUP_DONE = 2,
458 void btrfs_init_async_reclaim_work(struct work_struct *work);
461 struct reloc_control;
463 struct btrfs_fs_devices;
464 struct btrfs_balance_control;
465 struct btrfs_delayed_root;
468 * Block group or device which contains an active swapfile. Used for preventing
469 * unsafe operations while a swapfile is active.
471 * These are sorted on (ptr, inode) (note that a block group or device can
472 * contain more than one swapfile). We compare the pointer values because we
473 * don't actually care what the object is, we just need a quick check whether
474 * the object exists in the rbtree.
476 struct btrfs_swapfile_pin {
481 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
482 * points to a struct btrfs_device.
487 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
491 BTRFS_FS_CLOSING_START,
492 BTRFS_FS_CLOSING_DONE,
493 BTRFS_FS_LOG_RECOVERING,
495 BTRFS_FS_QUOTA_ENABLED,
496 BTRFS_FS_UPDATE_UUID_TREE_GEN,
497 BTRFS_FS_CREATING_FREE_SPACE_TREE,
501 BTRFS_FS_QUOTA_OVERRIDE,
502 /* Used to record internally whether fs has been frozen */
505 * Indicate that a whole-filesystem exclusive operation is running
506 * (device replace, resize, device add/delete, balance)
510 * To info transaction_kthread we need an immediate commit so it
511 * doesn't need to wait for commit_interval
513 BTRFS_FS_NEED_ASYNC_COMMIT,
515 * Indicate that balance has been set up from the ioctl and is in the
516 * main phase. The fs_info::balance_ctl is initialized.
517 * Set and cleared while holding fs_info::balance_mutex.
519 BTRFS_FS_BALANCE_RUNNING,
521 /* Indicate that the cleaner thread is awake and doing something. */
522 BTRFS_FS_CLEANER_RUNNING,
525 * The checksumming has an optimized version and is considered fast,
526 * so we don't need to offload checksums to workqueues.
528 BTRFS_FS_CSUM_IMPL_FAST,
531 struct btrfs_fs_info {
532 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
534 struct btrfs_root *extent_root;
535 struct btrfs_root *tree_root;
536 struct btrfs_root *chunk_root;
537 struct btrfs_root *dev_root;
538 struct btrfs_root *fs_root;
539 struct btrfs_root *csum_root;
540 struct btrfs_root *quota_root;
541 struct btrfs_root *uuid_root;
542 struct btrfs_root *free_space_root;
544 /* the log root tree is a directory of all the other log roots */
545 struct btrfs_root *log_root_tree;
547 spinlock_t fs_roots_radix_lock;
548 struct radix_tree_root fs_roots_radix;
550 /* block group cache stuff */
551 spinlock_t block_group_cache_lock;
552 u64 first_logical_byte;
553 struct rb_root block_group_cache_tree;
555 /* keep track of unallocated space */
556 atomic64_t free_chunk_space;
558 struct extent_io_tree freed_extents[2];
559 struct extent_io_tree *pinned_extents;
561 /* logical->physical extent mapping */
562 struct extent_map_tree mapping_tree;
565 * block reservation for extent, checksum, root tree and
566 * delayed dir index item
568 struct btrfs_block_rsv global_block_rsv;
569 /* block reservation for metadata operations */
570 struct btrfs_block_rsv trans_block_rsv;
571 /* block reservation for chunk tree */
572 struct btrfs_block_rsv chunk_block_rsv;
573 /* block reservation for delayed operations */
574 struct btrfs_block_rsv delayed_block_rsv;
575 /* block reservation for delayed refs */
576 struct btrfs_block_rsv delayed_refs_rsv;
578 struct btrfs_block_rsv empty_block_rsv;
581 u64 last_trans_committed;
582 u64 avg_delayed_ref_runtime;
585 * this is updated to the current trans every time a full commit
586 * is required instead of the faster short fsync log commits
588 u64 last_trans_log_full_commit;
589 unsigned long mount_opt;
591 * Track requests for actions that need to be done during transaction
592 * commit (like for some mount options).
594 unsigned long pending_changes;
595 unsigned long compress_type:4;
596 unsigned int compress_level;
599 * It is a suggestive number, the read side is safe even it gets a
600 * wrong number because we will write out the data into a regular
601 * extent. The write side(mount/remount) is under ->s_umount lock,
602 * so it is also safe.
606 struct btrfs_transaction *running_transaction;
607 wait_queue_head_t transaction_throttle;
608 wait_queue_head_t transaction_wait;
609 wait_queue_head_t transaction_blocked_wait;
610 wait_queue_head_t async_submit_wait;
613 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
614 * when they are updated.
616 * Because we do not clear the flags for ever, so we needn't use
617 * the lock on the read side.
619 * We also needn't use the lock when we mount the fs, because
620 * there is no other task which will update the flag.
622 spinlock_t super_lock;
623 struct btrfs_super_block *super_copy;
624 struct btrfs_super_block *super_for_commit;
625 struct super_block *sb;
626 struct inode *btree_inode;
627 struct mutex tree_log_mutex;
628 struct mutex transaction_kthread_mutex;
629 struct mutex cleaner_mutex;
630 struct mutex chunk_mutex;
633 * this is taken to make sure we don't set block groups ro after
634 * the free space cache has been allocated on them
636 struct mutex ro_block_group_mutex;
638 /* this is used during read/modify/write to make sure
639 * no two ios are trying to mod the same stripe at the same
642 struct btrfs_stripe_hash_table *stripe_hash_table;
645 * this protects the ordered operations list only while we are
646 * processing all of the entries on it. This way we make
647 * sure the commit code doesn't find the list temporarily empty
648 * because another function happens to be doing non-waiting preflush
649 * before jumping into the main commit.
651 struct mutex ordered_operations_mutex;
653 struct rw_semaphore commit_root_sem;
655 struct rw_semaphore cleanup_work_sem;
657 struct rw_semaphore subvol_sem;
658 struct srcu_struct subvol_srcu;
660 spinlock_t trans_lock;
662 * the reloc mutex goes with the trans lock, it is taken
663 * during commit to protect us from the relocation code
665 struct mutex reloc_mutex;
667 struct list_head trans_list;
668 struct list_head dead_roots;
669 struct list_head caching_block_groups;
671 spinlock_t delayed_iput_lock;
672 struct list_head delayed_iputs;
673 atomic_t nr_delayed_iputs;
674 wait_queue_head_t delayed_iputs_wait;
676 /* this protects tree_mod_seq_list */
677 spinlock_t tree_mod_seq_lock;
678 atomic64_t tree_mod_seq;
679 struct list_head tree_mod_seq_list;
681 /* this protects tree_mod_log */
682 rwlock_t tree_mod_log_lock;
683 struct rb_root tree_mod_log;
685 atomic_t async_delalloc_pages;
688 * this is used to protect the following list -- ordered_roots.
690 spinlock_t ordered_root_lock;
693 * all fs/file tree roots in which there are data=ordered extents
694 * pending writeback are added into this list.
696 * these can span multiple transactions and basically include
697 * every dirty data page that isn't from nodatacow
699 struct list_head ordered_roots;
701 struct mutex delalloc_root_mutex;
702 spinlock_t delalloc_root_lock;
703 /* all fs/file tree roots that have delalloc inodes. */
704 struct list_head delalloc_roots;
707 * there is a pool of worker threads for checksumming during writes
708 * and a pool for checksumming after reads. This is because readers
709 * can run with FS locks held, and the writers may be waiting for
710 * those locks. We don't want ordering in the pending list to cause
711 * deadlocks, and so the two are serviced separately.
713 * A third pool does submit_bio to avoid deadlocking with the other
716 struct btrfs_workqueue *workers;
717 struct btrfs_workqueue *delalloc_workers;
718 struct btrfs_workqueue *flush_workers;
719 struct btrfs_workqueue *endio_workers;
720 struct btrfs_workqueue *endio_meta_workers;
721 struct btrfs_workqueue *endio_raid56_workers;
722 struct btrfs_workqueue *endio_repair_workers;
723 struct btrfs_workqueue *rmw_workers;
724 struct btrfs_workqueue *endio_meta_write_workers;
725 struct btrfs_workqueue *endio_write_workers;
726 struct btrfs_workqueue *endio_freespace_worker;
727 struct btrfs_workqueue *caching_workers;
728 struct btrfs_workqueue *readahead_workers;
731 * fixup workers take dirty pages that didn't properly go through
732 * the cow mechanism and make them safe to write. It happens
733 * for the sys_munmap function call path
735 struct btrfs_workqueue *fixup_workers;
736 struct btrfs_workqueue *delayed_workers;
738 struct task_struct *transaction_kthread;
739 struct task_struct *cleaner_kthread;
740 u32 thread_pool_size;
742 struct kobject *space_info_kobj;
746 /* used to keep from writing metadata until there is a nice batch */
747 struct percpu_counter dirty_metadata_bytes;
748 struct percpu_counter delalloc_bytes;
749 struct percpu_counter dio_bytes;
750 s32 dirty_metadata_batch;
753 struct list_head dirty_cowonly_roots;
755 struct btrfs_fs_devices *fs_devices;
758 * The space_info list is effectively read only after initial
759 * setup. It is populated at mount time and cleaned up after
760 * all block groups are removed. RCU is used to protect it.
762 struct list_head space_info;
764 struct btrfs_space_info *data_sinfo;
766 struct reloc_control *reloc_ctl;
768 /* data_alloc_cluster is only used in ssd_spread mode */
769 struct btrfs_free_cluster data_alloc_cluster;
771 /* all metadata allocations go through this cluster */
772 struct btrfs_free_cluster meta_alloc_cluster;
774 /* auto defrag inodes go here */
775 spinlock_t defrag_inodes_lock;
776 struct rb_root defrag_inodes;
777 atomic_t defrag_running;
779 /* Used to protect avail_{data, metadata, system}_alloc_bits */
780 seqlock_t profiles_lock;
782 * these three are in extended format (availability of single
783 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
784 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
786 u64 avail_data_alloc_bits;
787 u64 avail_metadata_alloc_bits;
788 u64 avail_system_alloc_bits;
790 /* restriper state */
791 spinlock_t balance_lock;
792 struct mutex balance_mutex;
793 atomic_t balance_pause_req;
794 atomic_t balance_cancel_req;
795 struct btrfs_balance_control *balance_ctl;
796 wait_queue_head_t balance_wait_q;
798 u32 data_chunk_allocations;
803 /* private scrub information */
804 struct mutex scrub_lock;
805 atomic_t scrubs_running;
806 atomic_t scrub_pause_req;
807 atomic_t scrubs_paused;
808 atomic_t scrub_cancel_req;
809 wait_queue_head_t scrub_pause_wait;
811 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
814 refcount_t scrub_workers_refcnt;
815 struct btrfs_workqueue *scrub_workers;
816 struct btrfs_workqueue *scrub_wr_completion_workers;
817 struct btrfs_workqueue *scrub_parity_workers;
819 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
820 u32 check_integrity_print_mask;
822 /* is qgroup tracking in a consistent state? */
825 /* holds configuration and tracking. Protected by qgroup_lock */
826 struct rb_root qgroup_tree;
827 spinlock_t qgroup_lock;
830 * used to avoid frequently calling ulist_alloc()/ulist_free()
831 * when doing qgroup accounting, it must be protected by qgroup_lock.
833 struct ulist *qgroup_ulist;
835 /* protect user change for quota operations */
836 struct mutex qgroup_ioctl_lock;
838 /* list of dirty qgroups to be written at next commit */
839 struct list_head dirty_qgroups;
841 /* used by qgroup for an efficient tree traversal */
844 /* qgroup rescan items */
845 struct mutex qgroup_rescan_lock; /* protects the progress item */
846 struct btrfs_key qgroup_rescan_progress;
847 struct btrfs_workqueue *qgroup_rescan_workers;
848 struct completion qgroup_rescan_completion;
849 struct btrfs_work qgroup_rescan_work;
850 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
852 /* filesystem state */
853 unsigned long fs_state;
855 struct btrfs_delayed_root *delayed_root;
858 spinlock_t reada_lock;
859 struct radix_tree_root reada_tree;
861 /* readahead works cnt */
862 atomic_t reada_works_cnt;
864 /* Extent buffer radix tree */
865 spinlock_t buffer_lock;
866 struct radix_tree_root buffer_radix;
868 /* next backup root to be overwritten */
869 int backup_root_index;
871 /* device replace state */
872 struct btrfs_dev_replace dev_replace;
874 struct semaphore uuid_tree_rescan_sem;
876 /* Used to reclaim the metadata space in the background. */
877 struct work_struct async_reclaim_work;
879 spinlock_t unused_bgs_lock;
880 struct list_head unused_bgs;
881 struct mutex unused_bg_unpin_mutex;
882 struct mutex delete_unused_bgs_mutex;
884 /* Cached block sizes */
889 /* Block groups and devices containing active swapfiles. */
890 spinlock_t swapfile_pins_lock;
891 struct rb_root swapfile_pins;
893 struct crypto_shash *csum_shash;
896 * Number of send operations in progress.
897 * Updated while holding fs_info::balance_mutex.
899 int send_in_progress;
901 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
902 spinlock_t ref_verify_lock;
903 struct rb_root block_tree;
907 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
909 return sb->s_fs_info;
912 struct btrfs_subvolume_writers {
913 struct percpu_counter counter;
914 wait_queue_head_t wait;
918 * The state of btrfs root
922 * btrfs_record_root_in_trans is a multi-step process, and it can race
923 * with the balancing code. But the race is very small, and only the
924 * first time the root is added to each transaction. So IN_TRANS_SETUP
925 * is used to tell us when more checks are required
927 BTRFS_ROOT_IN_TRANS_SETUP,
929 BTRFS_ROOT_TRACK_DIRTY,
931 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
932 BTRFS_ROOT_DEFRAG_RUNNING,
933 BTRFS_ROOT_FORCE_COW,
934 BTRFS_ROOT_MULTI_LOG_TASKS,
939 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
941 * Set for the subvolume tree owning the reloc tree.
943 BTRFS_ROOT_DEAD_RELOC_TREE,
944 /* Mark dead root stored on device whose cleanup needs to be resumed */
945 BTRFS_ROOT_DEAD_TREE,
949 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
950 * code. For detail check comment in fs/btrfs/qgroup.c.
952 struct btrfs_qgroup_swapped_blocks {
954 /* RM_EMPTY_ROOT() of above blocks[] */
956 struct rb_root blocks[BTRFS_MAX_LEVEL];
960 * in ram representation of the tree. extent_root is used for all allocations
961 * and for the extent tree extent_root root.
964 struct extent_buffer *node;
966 struct extent_buffer *commit_root;
967 struct btrfs_root *log_root;
968 struct btrfs_root *reloc_root;
971 struct btrfs_root_item root_item;
972 struct btrfs_key root_key;
973 struct btrfs_fs_info *fs_info;
974 struct extent_io_tree dirty_log_pages;
976 struct mutex objectid_mutex;
978 spinlock_t accounting_lock;
979 struct btrfs_block_rsv *block_rsv;
981 /* free ino cache stuff */
982 struct btrfs_free_space_ctl *free_ino_ctl;
983 enum btrfs_caching_type ino_cache_state;
984 spinlock_t ino_cache_lock;
985 wait_queue_head_t ino_cache_wait;
986 struct btrfs_free_space_ctl *free_ino_pinned;
987 u64 ino_cache_progress;
988 struct inode *ino_cache_inode;
990 struct mutex log_mutex;
991 wait_queue_head_t log_writer_wait;
992 wait_queue_head_t log_commit_wait[2];
993 struct list_head log_ctxs[2];
994 atomic_t log_writers;
995 atomic_t log_commit[2];
998 /* No matter the commit succeeds or not*/
999 int log_transid_committed;
1000 /* Just be updated when the commit succeeds. */
1001 int last_log_commit;
1002 pid_t log_start_pid;
1008 u64 highest_objectid;
1010 u64 defrag_trans_start;
1011 struct btrfs_key defrag_progress;
1012 struct btrfs_key defrag_max;
1014 /* the dirty list is only used by non-reference counted roots */
1015 struct list_head dirty_list;
1017 struct list_head root_list;
1019 spinlock_t log_extents_lock[2];
1020 struct list_head logged_list[2];
1022 int orphan_cleanup_state;
1024 spinlock_t inode_lock;
1025 /* red-black tree that keeps track of in-memory inodes */
1026 struct rb_root inode_tree;
1029 * radix tree that keeps track of delayed nodes of every inode,
1030 * protected by inode_lock
1032 struct radix_tree_root delayed_nodes_tree;
1034 * right now this just gets used so that a root has its own devid
1035 * for stat. It may be used for more later
1039 spinlock_t root_item_lock;
1042 struct mutex delalloc_mutex;
1043 spinlock_t delalloc_lock;
1045 * all of the inodes that have delalloc bytes. It is possible for
1046 * this list to be empty even when there is still dirty data=ordered
1047 * extents waiting to finish IO.
1049 struct list_head delalloc_inodes;
1050 struct list_head delalloc_root;
1051 u64 nr_delalloc_inodes;
1053 struct mutex ordered_extent_mutex;
1055 * this is used by the balancing code to wait for all the pending
1058 spinlock_t ordered_extent_lock;
1061 * all of the data=ordered extents pending writeback
1062 * these can span multiple transactions and basically include
1063 * every dirty data page that isn't from nodatacow
1065 struct list_head ordered_extents;
1066 struct list_head ordered_root;
1067 u64 nr_ordered_extents;
1070 * Not empty if this subvolume root has gone through tree block swap
1073 * Will be used by reloc_control::dirty_subvol_roots.
1075 struct list_head reloc_dirty_list;
1078 * Number of currently running SEND ioctls to prevent
1079 * manipulation with the read-only status via SUBVOL_SETFLAGS
1081 int send_in_progress;
1083 * Number of currently running deduplication operations that have a
1084 * destination inode belonging to this root. Protected by the lock
1087 int dedupe_in_progress;
1088 struct btrfs_subvolume_writers *subv_writers;
1089 atomic_t will_be_snapshotted;
1090 atomic_t snapshot_force_cow;
1092 /* For qgroup metadata reserved space */
1093 spinlock_t qgroup_meta_rsv_lock;
1094 u64 qgroup_meta_rsv_pertrans;
1095 u64 qgroup_meta_rsv_prealloc;
1097 /* Number of active swapfiles */
1098 atomic_t nr_swapfiles;
1100 /* Record pairs of swapped blocks for qgroup */
1101 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1103 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1108 struct btrfs_clone_extent_info {
1118 struct btrfs_file_private {
1122 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1124 return btrfs_sb(inode->i_sb)->sectorsize;
1127 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1130 return info->nodesize - sizeof(struct btrfs_header);
1133 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1135 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1137 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1140 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1142 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1145 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1146 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1147 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1149 return BTRFS_MAX_ITEM_SIZE(info) -
1150 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1153 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1155 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1159 * Flags for mount options.
1161 * Note: don't forget to add new options to btrfs_show_options()
1163 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1164 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1165 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1166 #define BTRFS_MOUNT_SSD (1 << 3)
1167 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1168 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1169 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1170 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1171 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1172 #define BTRFS_MOUNT_NOSSD (1 << 9)
1173 #define BTRFS_MOUNT_DISCARD (1 << 10)
1174 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1175 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1176 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1177 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1178 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1179 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1180 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1181 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1182 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1183 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1184 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1185 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1186 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1187 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1188 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1189 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1190 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1191 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1193 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1194 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1196 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1197 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1198 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1199 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1202 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1204 if (!btrfs_test_opt(fs_info, opt)) \
1205 btrfs_info(fs_info, fmt, ##args); \
1206 btrfs_set_opt(fs_info->mount_opt, opt); \
1209 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1211 if (btrfs_test_opt(fs_info, opt)) \
1212 btrfs_info(fs_info, fmt, ##args); \
1213 btrfs_clear_opt(fs_info->mount_opt, opt); \
1217 * Requests for changes that need to be done during transaction commit.
1219 * Internal mount options that are used for special handling of the real
1220 * mount options (eg. cannot be set during remount and have to be set during
1221 * transaction commit)
1224 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1225 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1226 #define BTRFS_PENDING_COMMIT (2)
1228 #define btrfs_test_pending(info, opt) \
1229 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1230 #define btrfs_set_pending(info, opt) \
1231 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1232 #define btrfs_clear_pending(info, opt) \
1233 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1236 * Helpers for setting pending mount option changes.
1238 * Expects corresponding macros
1239 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1241 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1243 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1244 btrfs_info((info), fmt, ##args); \
1245 btrfs_set_pending((info), SET_##opt); \
1246 btrfs_clear_pending((info), CLEAR_##opt); \
1250 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1252 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1253 btrfs_info((info), fmt, ##args); \
1254 btrfs_set_pending((info), CLEAR_##opt); \
1255 btrfs_clear_pending((info), SET_##opt); \
1262 #define BTRFS_INODE_NODATASUM (1 << 0)
1263 #define BTRFS_INODE_NODATACOW (1 << 1)
1264 #define BTRFS_INODE_READONLY (1 << 2)
1265 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1266 #define BTRFS_INODE_PREALLOC (1 << 4)
1267 #define BTRFS_INODE_SYNC (1 << 5)
1268 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1269 #define BTRFS_INODE_APPEND (1 << 7)
1270 #define BTRFS_INODE_NODUMP (1 << 8)
1271 #define BTRFS_INODE_NOATIME (1 << 9)
1272 #define BTRFS_INODE_DIRSYNC (1 << 10)
1273 #define BTRFS_INODE_COMPRESS (1 << 11)
1275 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1277 #define BTRFS_INODE_FLAG_MASK \
1278 (BTRFS_INODE_NODATASUM | \
1279 BTRFS_INODE_NODATACOW | \
1280 BTRFS_INODE_READONLY | \
1281 BTRFS_INODE_NOCOMPRESS | \
1282 BTRFS_INODE_PREALLOC | \
1283 BTRFS_INODE_SYNC | \
1284 BTRFS_INODE_IMMUTABLE | \
1285 BTRFS_INODE_APPEND | \
1286 BTRFS_INODE_NODUMP | \
1287 BTRFS_INODE_NOATIME | \
1288 BTRFS_INODE_DIRSYNC | \
1289 BTRFS_INODE_COMPRESS | \
1290 BTRFS_INODE_ROOT_ITEM_INIT)
1292 struct btrfs_map_token {
1293 const struct extent_buffer *eb;
1295 unsigned long offset;
1298 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1299 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1301 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1302 struct extent_buffer *eb)
1305 token->kaddr = NULL;
1308 /* some macros to generate set/get functions for the struct fields. This
1309 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1312 #define le8_to_cpu(v) (v)
1313 #define cpu_to_le8(v) (v)
1316 #define read_eb_member(eb, ptr, type, member, result) (\
1317 read_extent_buffer(eb, (char *)(result), \
1318 ((unsigned long)(ptr)) + \
1319 offsetof(type, member), \
1320 sizeof(((type *)0)->member)))
1322 #define write_eb_member(eb, ptr, type, member, result) (\
1323 write_extent_buffer(eb, (char *)(result), \
1324 ((unsigned long)(ptr)) + \
1325 offsetof(type, member), \
1326 sizeof(((type *)0)->member)))
1328 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1329 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1330 const void *ptr, unsigned long off, \
1331 struct btrfs_map_token *token); \
1332 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1333 unsigned long off, u##bits val, \
1334 struct btrfs_map_token *token); \
1335 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1336 const void *ptr, unsigned long off); \
1337 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1338 unsigned long off, u##bits val);
1340 DECLARE_BTRFS_SETGET_BITS(8)
1341 DECLARE_BTRFS_SETGET_BITS(16)
1342 DECLARE_BTRFS_SETGET_BITS(32)
1343 DECLARE_BTRFS_SETGET_BITS(64)
1345 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1346 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1349 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1350 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1352 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1355 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1356 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1358 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1360 struct btrfs_map_token *token) \
1362 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1363 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1365 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1366 type *s, u##bits val, \
1367 struct btrfs_map_token *token) \
1369 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1370 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1373 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1374 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1376 const type *p = page_address(eb->pages[0]); \
1377 u##bits res = le##bits##_to_cpu(p->member); \
1380 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1383 type *p = page_address(eb->pages[0]); \
1384 p->member = cpu_to_le##bits(val); \
1387 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1388 static inline u##bits btrfs_##name(const type *s) \
1390 return le##bits##_to_cpu(s->member); \
1392 static inline void btrfs_set_##name(type *s, u##bits val) \
1394 s->member = cpu_to_le##bits(val); \
1398 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1399 struct btrfs_dev_item *s)
1401 BUILD_BUG_ON(sizeof(u64) !=
1402 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1403 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1406 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1407 struct btrfs_dev_item *s,
1410 BUILD_BUG_ON(sizeof(u64) !=
1411 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1412 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1413 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1417 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1418 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1419 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1420 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1421 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1423 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1424 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1425 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1426 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1427 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1428 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1430 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1431 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1433 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1435 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1437 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1439 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1441 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1442 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1444 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1446 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1448 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1451 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1453 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1456 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1458 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1461 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1462 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1463 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1464 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1465 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1466 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1467 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1468 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1469 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1470 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1471 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1473 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1475 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1478 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1479 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1480 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1482 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1484 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1486 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1488 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1489 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1491 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1493 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1494 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1496 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1499 unsigned long offset = (unsigned long)c;
1500 offset += offsetof(struct btrfs_chunk, stripe);
1501 offset += nr * sizeof(struct btrfs_stripe);
1502 return (struct btrfs_stripe *)offset;
1505 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1507 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1510 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1511 struct btrfs_chunk *c, int nr)
1513 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1516 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1517 struct btrfs_chunk *c, int nr)
1519 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1522 /* struct btrfs_block_group_item */
1523 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1525 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1527 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1528 struct btrfs_block_group_item, chunk_objectid, 64);
1530 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1531 struct btrfs_block_group_item, chunk_objectid, 64);
1532 BTRFS_SETGET_FUNCS(block_group_flags,
1533 struct btrfs_block_group_item, flags, 64);
1534 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1535 struct btrfs_block_group_item, flags, 64);
1537 /* struct btrfs_free_space_info */
1538 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1540 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1542 /* struct btrfs_inode_ref */
1543 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1544 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1546 /* struct btrfs_inode_extref */
1547 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1548 parent_objectid, 64);
1549 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1551 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1553 /* struct btrfs_inode_item */
1554 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1555 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1556 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1557 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1558 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1559 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1560 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1561 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1562 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1563 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1564 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1565 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1566 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1568 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1570 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1572 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1573 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1575 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1577 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1578 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1579 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1580 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1581 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1582 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1583 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1584 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1585 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1586 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1588 /* struct btrfs_dev_extent */
1589 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1591 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1592 chunk_objectid, 64);
1593 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1595 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1597 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1599 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1600 return (unsigned long)dev + ptr;
1603 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1604 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1606 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1608 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1611 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1613 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1614 struct btrfs_tree_block_info *item,
1615 struct btrfs_disk_key *key)
1617 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1620 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1621 struct btrfs_tree_block_info *item,
1622 struct btrfs_disk_key *key)
1624 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1627 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1629 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1631 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1633 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1636 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1639 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1641 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1644 static inline u32 btrfs_extent_inline_ref_size(int type)
1646 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1647 type == BTRFS_SHARED_BLOCK_REF_KEY)
1648 return sizeof(struct btrfs_extent_inline_ref);
1649 if (type == BTRFS_SHARED_DATA_REF_KEY)
1650 return sizeof(struct btrfs_shared_data_ref) +
1651 sizeof(struct btrfs_extent_inline_ref);
1652 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1653 return sizeof(struct btrfs_extent_data_ref) +
1654 offsetof(struct btrfs_extent_inline_ref, offset);
1658 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1659 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1661 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1662 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1664 /* struct btrfs_node */
1665 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1666 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1667 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1669 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1672 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1675 ptr = offsetof(struct btrfs_node, ptrs) +
1676 sizeof(struct btrfs_key_ptr) * nr;
1677 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1680 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1684 ptr = offsetof(struct btrfs_node, ptrs) +
1685 sizeof(struct btrfs_key_ptr) * nr;
1686 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1689 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1692 ptr = offsetof(struct btrfs_node, ptrs) +
1693 sizeof(struct btrfs_key_ptr) * nr;
1694 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1697 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1701 ptr = offsetof(struct btrfs_node, ptrs) +
1702 sizeof(struct btrfs_key_ptr) * nr;
1703 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1706 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1708 return offsetof(struct btrfs_node, ptrs) +
1709 sizeof(struct btrfs_key_ptr) * nr;
1712 void btrfs_node_key(const struct extent_buffer *eb,
1713 struct btrfs_disk_key *disk_key, int nr);
1715 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1716 struct btrfs_disk_key *disk_key, int nr)
1719 ptr = btrfs_node_key_ptr_offset(nr);
1720 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1721 struct btrfs_key_ptr, key, disk_key);
1724 /* struct btrfs_item */
1725 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1726 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1727 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1728 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1730 static inline unsigned long btrfs_item_nr_offset(int nr)
1732 return offsetof(struct btrfs_leaf, items) +
1733 sizeof(struct btrfs_item) * nr;
1736 static inline struct btrfs_item *btrfs_item_nr(int nr)
1738 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1741 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1742 struct btrfs_item *item)
1744 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1747 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1749 return btrfs_item_end(eb, btrfs_item_nr(nr));
1752 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1754 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1757 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1759 return btrfs_item_size(eb, btrfs_item_nr(nr));
1762 static inline void btrfs_item_key(const struct extent_buffer *eb,
1763 struct btrfs_disk_key *disk_key, int nr)
1765 struct btrfs_item *item = btrfs_item_nr(nr);
1766 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1769 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1770 struct btrfs_disk_key *disk_key, int nr)
1772 struct btrfs_item *item = btrfs_item_nr(nr);
1773 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1776 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1779 * struct btrfs_root_ref
1781 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1782 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1783 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1785 /* struct btrfs_dir_item */
1786 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1787 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1788 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1789 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1790 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1791 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1793 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1795 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1798 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1799 const struct btrfs_dir_item *item,
1800 struct btrfs_disk_key *key)
1802 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1805 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1806 struct btrfs_dir_item *item,
1807 const struct btrfs_disk_key *key)
1809 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1812 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1814 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1816 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1819 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1820 const struct btrfs_free_space_header *h,
1821 struct btrfs_disk_key *key)
1823 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1826 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1827 struct btrfs_free_space_header *h,
1828 const struct btrfs_disk_key *key)
1830 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1833 /* struct btrfs_disk_key */
1834 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1836 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1837 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1839 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1840 const struct btrfs_disk_key *disk)
1842 cpu->offset = le64_to_cpu(disk->offset);
1843 cpu->type = disk->type;
1844 cpu->objectid = le64_to_cpu(disk->objectid);
1847 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1848 const struct btrfs_key *cpu)
1850 disk->offset = cpu_to_le64(cpu->offset);
1851 disk->type = cpu->type;
1852 disk->objectid = cpu_to_le64(cpu->objectid);
1855 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1856 struct btrfs_key *key, int nr)
1858 struct btrfs_disk_key disk_key;
1859 btrfs_node_key(eb, &disk_key, nr);
1860 btrfs_disk_key_to_cpu(key, &disk_key);
1863 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1864 struct btrfs_key *key, int nr)
1866 struct btrfs_disk_key disk_key;
1867 btrfs_item_key(eb, &disk_key, nr);
1868 btrfs_disk_key_to_cpu(key, &disk_key);
1871 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1872 const struct btrfs_dir_item *item,
1873 struct btrfs_key *key)
1875 struct btrfs_disk_key disk_key;
1876 btrfs_dir_item_key(eb, item, &disk_key);
1877 btrfs_disk_key_to_cpu(key, &disk_key);
1880 /* struct btrfs_header */
1881 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1882 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1884 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1885 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1886 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1887 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1888 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1890 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1891 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1893 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1895 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1897 return (btrfs_header_flags(eb) & flag) == flag;
1900 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1902 u64 flags = btrfs_header_flags(eb);
1903 btrfs_set_header_flags(eb, flags | flag);
1906 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1908 u64 flags = btrfs_header_flags(eb);
1909 btrfs_set_header_flags(eb, flags & ~flag);
1912 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1914 u64 flags = btrfs_header_flags(eb);
1915 return flags >> BTRFS_BACKREF_REV_SHIFT;
1918 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1921 u64 flags = btrfs_header_flags(eb);
1922 flags &= ~BTRFS_BACKREF_REV_MASK;
1923 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1924 btrfs_set_header_flags(eb, flags);
1927 static inline unsigned long btrfs_header_fsid(void)
1929 return offsetof(struct btrfs_header, fsid);
1932 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
1934 return offsetof(struct btrfs_header, chunk_tree_uuid);
1937 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1939 return btrfs_header_level(eb) == 0;
1942 /* struct btrfs_root_item */
1943 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1945 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1946 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1947 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1949 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1951 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1952 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1953 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1954 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1955 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1956 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1957 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1958 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1960 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1962 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1964 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1966 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1968 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1971 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
1973 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
1976 static inline bool btrfs_root_dead(const struct btrfs_root *root)
1978 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
1981 /* struct btrfs_root_backup */
1982 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1984 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1986 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1987 tree_root_level, 8);
1989 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1991 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1992 chunk_root_gen, 64);
1993 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1994 chunk_root_level, 8);
1996 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1998 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1999 extent_root_gen, 64);
2000 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2001 extent_root_level, 8);
2003 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2005 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2007 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2010 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2012 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2014 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2017 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2019 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2021 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2022 csum_root_level, 8);
2023 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2025 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2027 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2030 /* struct btrfs_balance_item */
2031 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2033 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2034 const struct btrfs_balance_item *bi,
2035 struct btrfs_disk_balance_args *ba)
2037 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2040 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2041 struct btrfs_balance_item *bi,
2042 const struct btrfs_disk_balance_args *ba)
2044 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2047 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2048 const struct btrfs_balance_item *bi,
2049 struct btrfs_disk_balance_args *ba)
2051 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2054 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2055 struct btrfs_balance_item *bi,
2056 const struct btrfs_disk_balance_args *ba)
2058 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2061 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2062 const struct btrfs_balance_item *bi,
2063 struct btrfs_disk_balance_args *ba)
2065 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2068 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2069 struct btrfs_balance_item *bi,
2070 const struct btrfs_disk_balance_args *ba)
2072 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2076 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2077 const struct btrfs_disk_balance_args *disk)
2079 memset(cpu, 0, sizeof(*cpu));
2081 cpu->profiles = le64_to_cpu(disk->profiles);
2082 cpu->usage = le64_to_cpu(disk->usage);
2083 cpu->devid = le64_to_cpu(disk->devid);
2084 cpu->pstart = le64_to_cpu(disk->pstart);
2085 cpu->pend = le64_to_cpu(disk->pend);
2086 cpu->vstart = le64_to_cpu(disk->vstart);
2087 cpu->vend = le64_to_cpu(disk->vend);
2088 cpu->target = le64_to_cpu(disk->target);
2089 cpu->flags = le64_to_cpu(disk->flags);
2090 cpu->limit = le64_to_cpu(disk->limit);
2091 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2092 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2096 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2097 const struct btrfs_balance_args *cpu)
2099 memset(disk, 0, sizeof(*disk));
2101 disk->profiles = cpu_to_le64(cpu->profiles);
2102 disk->usage = cpu_to_le64(cpu->usage);
2103 disk->devid = cpu_to_le64(cpu->devid);
2104 disk->pstart = cpu_to_le64(cpu->pstart);
2105 disk->pend = cpu_to_le64(cpu->pend);
2106 disk->vstart = cpu_to_le64(cpu->vstart);
2107 disk->vend = cpu_to_le64(cpu->vend);
2108 disk->target = cpu_to_le64(cpu->target);
2109 disk->flags = cpu_to_le64(cpu->flags);
2110 disk->limit = cpu_to_le64(cpu->limit);
2111 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2112 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2115 /* struct btrfs_super_block */
2116 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2117 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2118 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2120 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2121 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2122 struct btrfs_super_block, sys_chunk_array_size, 32);
2123 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2124 struct btrfs_super_block, chunk_root_generation, 64);
2125 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2127 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2129 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2130 chunk_root_level, 8);
2131 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2133 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2134 log_root_transid, 64);
2135 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2137 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2139 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2141 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2143 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2145 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2147 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2148 root_dir_objectid, 64);
2149 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2151 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2153 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2154 compat_ro_flags, 64);
2155 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2156 incompat_flags, 64);
2157 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2159 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2160 cache_generation, 64);
2161 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2162 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2163 uuid_tree_generation, 64);
2165 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2166 const char *btrfs_super_csum_name(u16 csum_type);
2167 const char *btrfs_super_csum_driver(u16 csum_type);
2168 size_t __const btrfs_get_num_csums(void);
2172 * The leaf data grows from end-to-front in the node.
2173 * this returns the address of the start of the last item,
2174 * which is the stop of the leaf data stack
2176 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2178 u32 nr = btrfs_header_nritems(leaf);
2181 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2182 return btrfs_item_offset_nr(leaf, nr - 1);
2185 /* struct btrfs_file_extent_item */
2186 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2187 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2188 struct btrfs_file_extent_item, disk_bytenr, 64);
2189 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2190 struct btrfs_file_extent_item, offset, 64);
2191 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2192 struct btrfs_file_extent_item, generation, 64);
2193 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2194 struct btrfs_file_extent_item, num_bytes, 64);
2195 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2196 struct btrfs_file_extent_item, disk_num_bytes, 64);
2197 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2198 struct btrfs_file_extent_item, compression, 8);
2200 static inline unsigned long
2201 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2203 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2206 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2208 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2211 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2213 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2215 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2216 disk_num_bytes, 64);
2217 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2219 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2221 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2223 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2225 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2227 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2228 other_encoding, 16);
2231 * this returns the number of bytes used by the item on disk, minus the
2232 * size of any extent headers. If a file is compressed on disk, this is
2233 * the compressed size
2235 static inline u32 btrfs_file_extent_inline_item_len(
2236 const struct extent_buffer *eb,
2237 struct btrfs_item *e)
2239 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2242 /* btrfs_qgroup_status_item */
2243 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2245 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2247 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2249 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2252 /* btrfs_qgroup_info_item */
2253 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2255 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2256 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2258 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2259 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2262 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2263 struct btrfs_qgroup_info_item, generation, 64);
2264 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2266 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2267 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2268 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2270 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2271 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2273 /* btrfs_qgroup_limit_item */
2274 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2276 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2278 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2280 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2282 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2285 /* btrfs_dev_replace_item */
2286 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2287 struct btrfs_dev_replace_item, src_devid, 64);
2288 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2289 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2291 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2293 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2295 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2297 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2298 num_write_errors, 64);
2299 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2300 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2302 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2304 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2307 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2308 struct btrfs_dev_replace_item, src_devid, 64);
2309 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2310 struct btrfs_dev_replace_item,
2311 cont_reading_from_srcdev_mode, 64);
2312 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2313 struct btrfs_dev_replace_item, replace_state, 64);
2314 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2315 struct btrfs_dev_replace_item, time_started, 64);
2316 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2317 struct btrfs_dev_replace_item, time_stopped, 64);
2318 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2319 struct btrfs_dev_replace_item, num_write_errors, 64);
2320 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2321 struct btrfs_dev_replace_item,
2322 num_uncorrectable_read_errors, 64);
2323 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2324 struct btrfs_dev_replace_item, cursor_left, 64);
2325 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2326 struct btrfs_dev_replace_item, cursor_right, 64);
2328 /* helper function to cast into the data area of the leaf. */
2329 #define btrfs_item_ptr(leaf, slot, type) \
2330 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2331 btrfs_item_offset_nr(leaf, slot)))
2333 #define btrfs_item_ptr_offset(leaf, slot) \
2334 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2335 btrfs_item_offset_nr(leaf, slot)))
2337 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2339 return crc32c(crc, address, length);
2342 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2344 put_unaligned_le32(~crc, result);
2347 static inline u64 btrfs_name_hash(const char *name, int len)
2349 return crc32c((u32)~1, name, len);
2353 * Figure the key offset of an extended inode ref
2355 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2358 return (u64) crc32c(parent_objectid, name, len);
2361 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2363 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2368 enum btrfs_inline_ref_type {
2369 BTRFS_REF_TYPE_INVALID,
2370 BTRFS_REF_TYPE_BLOCK,
2371 BTRFS_REF_TYPE_DATA,
2375 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2376 struct btrfs_extent_inline_ref *iref,
2377 enum btrfs_inline_ref_type is_data);
2378 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2380 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2383 * Use this if we would be adding new items, as we could split nodes as we cow
2386 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2389 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2393 * Doing a truncate or a modification won't result in new nodes or leaves, just
2394 * what we need for COW.
2396 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2399 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2402 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2403 u64 start, u64 num_bytes);
2404 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2405 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2406 unsigned long count);
2407 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2408 struct btrfs_delayed_ref_root *delayed_refs,
2409 struct btrfs_delayed_ref_head *head);
2410 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2411 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2412 struct btrfs_fs_info *fs_info, u64 bytenr,
2413 u64 offset, int metadata, u64 *refs, u64 *flags);
2414 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2415 u64 bytenr, u64 num, int reserved);
2416 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2417 u64 bytenr, u64 num_bytes);
2418 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2419 int btrfs_cross_ref_exist(struct btrfs_root *root,
2420 u64 objectid, u64 offset, u64 bytenr);
2421 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2422 struct btrfs_root *root,
2423 u64 parent, u64 root_objectid,
2424 const struct btrfs_disk_key *key,
2425 int level, u64 hint,
2427 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2428 struct btrfs_root *root,
2429 struct extent_buffer *buf,
2430 u64 parent, int last_ref);
2431 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2432 struct btrfs_root *root, u64 owner,
2433 u64 offset, u64 ram_bytes,
2434 struct btrfs_key *ins);
2435 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2436 u64 root_objectid, u64 owner, u64 offset,
2437 struct btrfs_key *ins);
2438 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2439 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2440 struct btrfs_key *ins, int is_data, int delalloc);
2441 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2442 struct extent_buffer *buf, int full_backref);
2443 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2444 struct extent_buffer *buf, int full_backref);
2445 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2446 u64 bytenr, u64 num_bytes, u64 flags,
2447 int level, int is_data);
2448 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2450 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2451 u64 start, u64 len, int delalloc);
2452 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2453 u64 start, u64 len);
2454 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2455 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2456 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2457 struct btrfs_ref *generic_ref);
2459 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2460 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache);
2461 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache);
2462 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2464 enum btrfs_reserve_flush_enum {
2465 /* If we are in the transaction, we can't flush anything.*/
2466 BTRFS_RESERVE_NO_FLUSH,
2468 * Flushing delalloc may cause deadlock somewhere, in this
2469 * case, use FLUSH LIMIT
2471 BTRFS_RESERVE_FLUSH_LIMIT,
2472 BTRFS_RESERVE_FLUSH_EVICT,
2473 BTRFS_RESERVE_FLUSH_ALL,
2476 enum btrfs_flush_state {
2477 FLUSH_DELAYED_ITEMS_NR = 1,
2478 FLUSH_DELAYED_ITEMS = 2,
2479 FLUSH_DELAYED_REFS_NR = 3,
2480 FLUSH_DELAYED_REFS = 4,
2482 FLUSH_DELALLOC_WAIT = 6,
2484 ALLOC_CHUNK_FORCE = 8,
2485 RUN_DELAYED_IPUTS = 9,
2489 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2490 struct btrfs_block_rsv *rsv,
2491 int nitems, bool use_global_rsv);
2492 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2493 struct btrfs_block_rsv *rsv);
2494 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2496 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2497 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2498 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2499 u64 start, u64 end);
2500 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2501 u64 num_bytes, u64 *actual_bytes);
2502 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2504 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2505 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2506 struct btrfs_fs_info *fs_info);
2507 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2508 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2509 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2512 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2513 int level, int *slot);
2514 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2515 int btrfs_previous_item(struct btrfs_root *root,
2516 struct btrfs_path *path, u64 min_objectid,
2518 int btrfs_previous_extent_item(struct btrfs_root *root,
2519 struct btrfs_path *path, u64 min_objectid);
2520 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2521 struct btrfs_path *path,
2522 const struct btrfs_key *new_key);
2523 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2524 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2525 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2526 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2527 struct btrfs_key *key, int lowest_level,
2529 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2530 struct btrfs_path *path,
2532 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2535 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2536 struct btrfs_root *root, struct extent_buffer *buf,
2537 struct extent_buffer *parent, int parent_slot,
2538 struct extent_buffer **cow_ret);
2539 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2540 struct btrfs_root *root,
2541 struct extent_buffer *buf,
2542 struct extent_buffer **cow_ret, u64 new_root_objectid);
2543 int btrfs_block_can_be_shared(struct btrfs_root *root,
2544 struct extent_buffer *buf);
2545 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2546 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2547 int btrfs_split_item(struct btrfs_trans_handle *trans,
2548 struct btrfs_root *root,
2549 struct btrfs_path *path,
2550 const struct btrfs_key *new_key,
2551 unsigned long split_offset);
2552 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2553 struct btrfs_root *root,
2554 struct btrfs_path *path,
2555 const struct btrfs_key *new_key);
2556 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2557 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2558 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2559 const struct btrfs_key *key, struct btrfs_path *p,
2560 int ins_len, int cow);
2561 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2562 struct btrfs_path *p, u64 time_seq);
2563 int btrfs_search_slot_for_read(struct btrfs_root *root,
2564 const struct btrfs_key *key,
2565 struct btrfs_path *p, int find_higher,
2567 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2568 struct btrfs_root *root, struct extent_buffer *parent,
2569 int start_slot, u64 *last_ret,
2570 struct btrfs_key *progress);
2571 void btrfs_release_path(struct btrfs_path *p);
2572 struct btrfs_path *btrfs_alloc_path(void);
2573 void btrfs_free_path(struct btrfs_path *p);
2575 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2576 struct btrfs_path *path, int slot, int nr);
2577 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2578 struct btrfs_root *root,
2579 struct btrfs_path *path)
2581 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2584 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2585 const struct btrfs_key *cpu_key, u32 *data_size,
2586 u32 total_data, u32 total_size, int nr);
2587 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2588 const struct btrfs_key *key, void *data, u32 data_size);
2589 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2590 struct btrfs_root *root,
2591 struct btrfs_path *path,
2592 const struct btrfs_key *cpu_key, u32 *data_size,
2595 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2596 struct btrfs_root *root,
2597 struct btrfs_path *path,
2598 const struct btrfs_key *key,
2601 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2604 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2605 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2606 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2608 static inline int btrfs_next_old_item(struct btrfs_root *root,
2609 struct btrfs_path *p, u64 time_seq)
2612 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2613 return btrfs_next_old_leaf(root, p, time_seq);
2616 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2618 return btrfs_next_old_item(root, p, 0);
2620 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2621 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2622 struct btrfs_block_rsv *block_rsv,
2623 int update_ref, int for_reloc);
2624 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2625 struct btrfs_root *root,
2626 struct extent_buffer *node,
2627 struct extent_buffer *parent);
2628 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2631 * Do it this way so we only ever do one test_bit in the normal case.
2633 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2634 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2642 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2643 * anything except sleeping. This function is used to check the status of
2646 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2648 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2651 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2653 kfree(fs_info->balance_ctl);
2654 kfree(fs_info->delayed_root);
2655 kfree(fs_info->extent_root);
2656 kfree(fs_info->tree_root);
2657 kfree(fs_info->chunk_root);
2658 kfree(fs_info->dev_root);
2659 kfree(fs_info->csum_root);
2660 kfree(fs_info->quota_root);
2661 kfree(fs_info->uuid_root);
2662 kfree(fs_info->free_space_root);
2663 kfree(fs_info->super_copy);
2664 kfree(fs_info->super_for_commit);
2668 /* tree mod log functions from ctree.c */
2669 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2670 struct seq_list *elem);
2671 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2672 struct seq_list *elem);
2673 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2676 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2677 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2679 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2680 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2682 int btrfs_del_root(struct btrfs_trans_handle *trans,
2683 const struct btrfs_key *key);
2684 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2685 const struct btrfs_key *key,
2686 struct btrfs_root_item *item);
2687 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2688 struct btrfs_root *root,
2689 struct btrfs_key *key,
2690 struct btrfs_root_item *item);
2691 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2692 struct btrfs_path *path, struct btrfs_root_item *root_item,
2693 struct btrfs_key *root_key);
2694 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2695 void btrfs_set_root_node(struct btrfs_root_item *item,
2696 struct extent_buffer *node);
2697 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2698 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2699 struct btrfs_root *root);
2702 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2704 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2706 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2707 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2711 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2712 const char *name, int name_len);
2713 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2714 int name_len, struct btrfs_inode *dir,
2715 struct btrfs_key *location, u8 type, u64 index);
2716 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2717 struct btrfs_root *root,
2718 struct btrfs_path *path, u64 dir,
2719 const char *name, int name_len,
2721 struct btrfs_dir_item *
2722 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2723 struct btrfs_root *root,
2724 struct btrfs_path *path, u64 dir,
2725 u64 objectid, const char *name, int name_len,
2727 struct btrfs_dir_item *
2728 btrfs_search_dir_index_item(struct btrfs_root *root,
2729 struct btrfs_path *path, u64 dirid,
2730 const char *name, int name_len);
2731 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2732 struct btrfs_root *root,
2733 struct btrfs_path *path,
2734 struct btrfs_dir_item *di);
2735 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2736 struct btrfs_root *root,
2737 struct btrfs_path *path, u64 objectid,
2738 const char *name, u16 name_len,
2739 const void *data, u16 data_len);
2740 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2741 struct btrfs_root *root,
2742 struct btrfs_path *path, u64 dir,
2743 const char *name, u16 name_len,
2745 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2746 struct btrfs_path *path,
2751 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2752 struct btrfs_root *root, u64 offset);
2753 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2754 struct btrfs_root *root, u64 offset);
2755 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2758 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2759 struct btrfs_root *root,
2760 const char *name, int name_len,
2761 u64 inode_objectid, u64 ref_objectid, u64 index);
2762 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2763 struct btrfs_root *root,
2764 const char *name, int name_len,
2765 u64 inode_objectid, u64 ref_objectid, u64 *index);
2766 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2767 struct btrfs_root *root,
2768 struct btrfs_path *path, u64 objectid);
2769 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2770 *root, struct btrfs_path *path,
2771 struct btrfs_key *location, int mod);
2773 struct btrfs_inode_extref *
2774 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2775 struct btrfs_root *root,
2776 struct btrfs_path *path,
2777 const char *name, int name_len,
2778 u64 inode_objectid, u64 ref_objectid, int ins_len,
2781 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2782 int slot, const char *name,
2784 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2785 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2786 const char *name, int name_len);
2788 struct btrfs_dio_private;
2789 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2790 struct btrfs_root *root, u64 bytenr, u64 len);
2791 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2793 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
2794 u64 logical_offset);
2795 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2796 struct btrfs_root *root,
2797 u64 objectid, u64 pos,
2798 u64 disk_offset, u64 disk_num_bytes,
2799 u64 num_bytes, u64 offset, u64 ram_bytes,
2800 u8 compression, u8 encryption, u16 other_encoding);
2801 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2802 struct btrfs_root *root,
2803 struct btrfs_path *path, u64 objectid,
2804 u64 bytenr, int mod);
2805 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2806 struct btrfs_root *root,
2807 struct btrfs_ordered_sum *sums);
2808 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2809 u64 file_start, int contig);
2810 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2811 struct list_head *list, int search_commit);
2812 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2813 const struct btrfs_path *path,
2814 struct btrfs_file_extent_item *fi,
2815 const bool new_inline,
2816 struct extent_map *em);
2819 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2820 u64 start, u64 len);
2821 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2822 u64 *orig_start, u64 *orig_block_len,
2825 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2826 struct btrfs_inode *inode);
2827 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2828 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2829 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2830 struct btrfs_root *root,
2831 struct btrfs_inode *dir, struct btrfs_inode *inode,
2832 const char *name, int name_len);
2833 int btrfs_add_link(struct btrfs_trans_handle *trans,
2834 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2835 const char *name, int name_len, int add_backref, u64 index);
2836 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2837 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2839 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2840 struct btrfs_root *root,
2841 struct inode *inode, u64 new_size,
2844 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2845 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2846 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2847 unsigned int extra_bits,
2848 struct extent_state **cached_state);
2849 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2850 struct btrfs_root *new_root,
2851 struct btrfs_root *parent_root,
2853 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2855 void btrfs_clear_delalloc_extent(struct inode *inode,
2856 struct extent_state *state, unsigned *bits);
2857 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2858 struct extent_state *other);
2859 void btrfs_split_delalloc_extent(struct inode *inode,
2860 struct extent_state *orig, u64 split);
2861 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2862 unsigned long bio_flags);
2863 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2864 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2865 int btrfs_readpage(struct file *file, struct page *page);
2866 void btrfs_evict_inode(struct inode *inode);
2867 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2868 struct inode *btrfs_alloc_inode(struct super_block *sb);
2869 void btrfs_destroy_inode(struct inode *inode);
2870 void btrfs_free_inode(struct inode *inode);
2871 int btrfs_drop_inode(struct inode *inode);
2872 int __init btrfs_init_cachep(void);
2873 void __cold btrfs_destroy_cachep(void);
2874 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2875 struct btrfs_root *root, struct btrfs_path *path);
2876 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2877 struct btrfs_root *root);
2878 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2879 struct page *page, size_t pg_offset,
2880 u64 start, u64 end, int create);
2881 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2882 struct btrfs_root *root,
2883 struct inode *inode);
2884 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2885 struct btrfs_root *root, struct inode *inode);
2886 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2887 struct btrfs_inode *inode);
2888 int btrfs_orphan_cleanup(struct btrfs_root *root);
2889 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2890 void btrfs_add_delayed_iput(struct inode *inode);
2891 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2892 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2893 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2894 u64 start, u64 num_bytes, u64 min_size,
2895 loff_t actual_len, u64 *alloc_hint);
2896 int btrfs_prealloc_file_range_trans(struct inode *inode,
2897 struct btrfs_trans_handle *trans, int mode,
2898 u64 start, u64 num_bytes, u64 min_size,
2899 loff_t actual_len, u64 *alloc_hint);
2900 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2901 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2902 struct writeback_control *wbc);
2903 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2904 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2905 u64 end, int uptodate);
2906 extern const struct dentry_operations btrfs_dentry_operations;
2909 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2910 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2911 int btrfs_ioctl_get_supported_features(void __user *arg);
2912 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2913 int __pure btrfs_is_empty_uuid(u8 *uuid);
2914 int btrfs_defrag_file(struct inode *inode, struct file *file,
2915 struct btrfs_ioctl_defrag_range_args *range,
2916 u64 newer_than, unsigned long max_pages);
2917 void btrfs_get_block_group_info(struct list_head *groups_list,
2918 struct btrfs_ioctl_space_info *space);
2919 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2920 struct btrfs_ioctl_balance_args *bargs);
2923 int __init btrfs_auto_defrag_init(void);
2924 void __cold btrfs_auto_defrag_exit(void);
2925 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2926 struct btrfs_inode *inode);
2927 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2928 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2929 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2930 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2932 extern const struct file_operations btrfs_file_operations;
2933 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2934 struct btrfs_root *root, struct inode *inode,
2935 struct btrfs_path *path, u64 start, u64 end,
2936 u64 *drop_end, int drop_cache,
2938 u32 extent_item_size,
2940 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2941 struct btrfs_root *root, struct inode *inode, u64 start,
2942 u64 end, int drop_cache);
2943 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2944 const u64 start, const u64 end,
2945 struct btrfs_clone_extent_info *clone_info,
2946 struct btrfs_trans_handle **trans_out);
2947 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2948 struct btrfs_inode *inode, u64 start, u64 end);
2949 int btrfs_release_file(struct inode *inode, struct file *file);
2950 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2951 size_t num_pages, loff_t pos, size_t write_bytes,
2952 struct extent_state **cached);
2953 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2954 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
2955 struct file *file_out, loff_t pos_out,
2956 loff_t len, unsigned int remap_flags);
2959 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2960 struct btrfs_root *root);
2963 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
2964 unsigned long new_flags);
2965 int btrfs_sync_fs(struct super_block *sb, int wait);
2967 static inline __printf(2, 3) __cold
2968 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
2972 #ifdef CONFIG_PRINTK
2975 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
2977 #define btrfs_printk(fs_info, fmt, args...) \
2978 btrfs_no_printk(fs_info, fmt, ##args)
2981 #define btrfs_emerg(fs_info, fmt, args...) \
2982 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
2983 #define btrfs_alert(fs_info, fmt, args...) \
2984 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
2985 #define btrfs_crit(fs_info, fmt, args...) \
2986 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
2987 #define btrfs_err(fs_info, fmt, args...) \
2988 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
2989 #define btrfs_warn(fs_info, fmt, args...) \
2990 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
2991 #define btrfs_notice(fs_info, fmt, args...) \
2992 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
2993 #define btrfs_info(fs_info, fmt, args...) \
2994 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
2997 * Wrappers that use printk_in_rcu
2999 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3000 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3001 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3002 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3003 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3004 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3005 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3006 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3007 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3008 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3009 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3010 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3011 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3012 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3015 * Wrappers that use a ratelimited printk_in_rcu
3017 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3018 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3019 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3020 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3021 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3022 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3023 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3024 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3025 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3026 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3027 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3028 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3029 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3030 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3033 * Wrappers that use a ratelimited printk
3035 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3036 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3037 #define btrfs_alert_rl(fs_info, fmt, args...) \
3038 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3039 #define btrfs_crit_rl(fs_info, fmt, args...) \
3040 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3041 #define btrfs_err_rl(fs_info, fmt, args...) \
3042 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3043 #define btrfs_warn_rl(fs_info, fmt, args...) \
3044 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3045 #define btrfs_notice_rl(fs_info, fmt, args...) \
3046 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3047 #define btrfs_info_rl(fs_info, fmt, args...) \
3048 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3050 #if defined(CONFIG_DYNAMIC_DEBUG)
3051 #define btrfs_debug(fs_info, fmt, args...) \
3052 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3053 fs_info, KERN_DEBUG fmt, ##args)
3054 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3055 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3056 fs_info, KERN_DEBUG fmt, ##args)
3057 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3058 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3059 fs_info, KERN_DEBUG fmt, ##args)
3060 #define btrfs_debug_rl(fs_info, fmt, args...) \
3061 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3062 fs_info, KERN_DEBUG fmt, ##args)
3063 #elif defined(DEBUG)
3064 #define btrfs_debug(fs_info, fmt, args...) \
3065 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3066 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3067 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3068 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3069 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3070 #define btrfs_debug_rl(fs_info, fmt, args...) \
3071 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3073 #define btrfs_debug(fs_info, fmt, args...) \
3074 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3075 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3076 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3077 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3078 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3079 #define btrfs_debug_rl(fs_info, fmt, args...) \
3080 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3083 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3086 btrfs_printk(fs_info, fmt, ##args); \
3087 rcu_read_unlock(); \
3090 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3093 btrfs_no_printk(fs_info, fmt, ##args); \
3094 rcu_read_unlock(); \
3097 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3099 static DEFINE_RATELIMIT_STATE(_rs, \
3100 DEFAULT_RATELIMIT_INTERVAL, \
3101 DEFAULT_RATELIMIT_BURST); \
3102 if (__ratelimit(&_rs)) \
3103 btrfs_printk(fs_info, fmt, ##args); \
3106 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3109 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3110 rcu_read_unlock(); \
3114 static inline void assfail(const char *expr, const char *file, int line)
3116 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3117 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3122 #define ASSERT(expr) \
3123 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3126 * Use that for functions that are conditionally exported for sanity tests but
3129 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3130 #define EXPORT_FOR_TESTS static
3132 #define EXPORT_FOR_TESTS
3136 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3139 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3144 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3145 unsigned int line, int errno, const char *fmt, ...);
3147 const char * __attribute_const__ btrfs_decode_error(int errno);
3150 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3151 const char *function,
3152 unsigned int line, int errno);
3155 * Call btrfs_abort_transaction as early as possible when an error condition is
3156 * detected, that way the exact line number is reported.
3158 #define btrfs_abort_transaction(trans, errno) \
3160 /* Report first abort since mount */ \
3161 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3162 &((trans)->fs_info->fs_state))) { \
3163 if ((errno) != -EIO) { \
3164 WARN(1, KERN_DEBUG \
3165 "BTRFS: Transaction aborted (error %d)\n", \
3168 btrfs_debug((trans)->fs_info, \
3169 "Transaction aborted (error %d)", \
3173 __btrfs_abort_transaction((trans), __func__, \
3174 __LINE__, (errno)); \
3177 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3179 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3180 (errno), fmt, ##args); \
3185 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3186 unsigned int line, int errno, const char *fmt, ...);
3188 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3189 * will panic(). Otherwise we BUG() here.
3191 #define btrfs_panic(fs_info, errno, fmt, args...) \
3193 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3198 /* compatibility and incompatibility defines */
3200 #define btrfs_set_fs_incompat(__fs_info, opt) \
3201 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3204 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3205 u64 flag, const char* name)
3207 struct btrfs_super_block *disk_super;
3210 disk_super = fs_info->super_copy;
3211 features = btrfs_super_incompat_flags(disk_super);
3212 if (!(features & flag)) {
3213 spin_lock(&fs_info->super_lock);
3214 features = btrfs_super_incompat_flags(disk_super);
3215 if (!(features & flag)) {
3217 btrfs_set_super_incompat_flags(disk_super, features);
3219 "setting incompat feature flag for %s (0x%llx)",
3222 spin_unlock(&fs_info->super_lock);
3226 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3227 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3230 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3231 u64 flag, const char* name)
3233 struct btrfs_super_block *disk_super;
3236 disk_super = fs_info->super_copy;
3237 features = btrfs_super_incompat_flags(disk_super);
3238 if (features & flag) {
3239 spin_lock(&fs_info->super_lock);
3240 features = btrfs_super_incompat_flags(disk_super);
3241 if (features & flag) {
3243 btrfs_set_super_incompat_flags(disk_super, features);
3245 "clearing incompat feature flag for %s (0x%llx)",
3248 spin_unlock(&fs_info->super_lock);
3252 #define btrfs_fs_incompat(fs_info, opt) \
3253 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3255 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3257 struct btrfs_super_block *disk_super;
3258 disk_super = fs_info->super_copy;
3259 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3262 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3263 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3266 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3267 u64 flag, const char *name)
3269 struct btrfs_super_block *disk_super;
3272 disk_super = fs_info->super_copy;
3273 features = btrfs_super_compat_ro_flags(disk_super);
3274 if (!(features & flag)) {
3275 spin_lock(&fs_info->super_lock);
3276 features = btrfs_super_compat_ro_flags(disk_super);
3277 if (!(features & flag)) {
3279 btrfs_set_super_compat_ro_flags(disk_super, features);
3281 "setting compat-ro feature flag for %s (0x%llx)",
3284 spin_unlock(&fs_info->super_lock);
3288 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3289 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3292 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3293 u64 flag, const char *name)
3295 struct btrfs_super_block *disk_super;
3298 disk_super = fs_info->super_copy;
3299 features = btrfs_super_compat_ro_flags(disk_super);
3300 if (features & flag) {
3301 spin_lock(&fs_info->super_lock);
3302 features = btrfs_super_compat_ro_flags(disk_super);
3303 if (features & flag) {
3305 btrfs_set_super_compat_ro_flags(disk_super, features);
3307 "clearing compat-ro feature flag for %s (0x%llx)",
3310 spin_unlock(&fs_info->super_lock);
3314 #define btrfs_fs_compat_ro(fs_info, opt) \
3315 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3317 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3319 struct btrfs_super_block *disk_super;
3320 disk_super = fs_info->super_copy;
3321 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3325 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3326 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3327 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3328 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3329 struct inode *inode, struct inode *dir);
3331 #define btrfs_get_acl NULL
3332 #define btrfs_set_acl NULL
3333 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3334 struct inode *inode, struct inode *dir)
3341 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3342 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3343 struct btrfs_root *root);
3344 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3345 struct btrfs_root *root);
3346 int btrfs_recover_relocation(struct btrfs_root *root);
3347 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3348 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3349 struct btrfs_root *root, struct extent_buffer *buf,
3350 struct extent_buffer *cow);
3351 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3352 u64 *bytes_to_reserve);
3353 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3354 struct btrfs_pending_snapshot *pending);
3357 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3358 u64 end, struct btrfs_scrub_progress *progress,
3359 int readonly, int is_dev_replace);
3360 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3361 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3362 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3363 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3364 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3365 struct btrfs_scrub_progress *progress);
3366 static inline void btrfs_init_full_stripe_locks_tree(
3367 struct btrfs_full_stripe_locks_tree *locks_root)
3369 locks_root->root = RB_ROOT;
3370 mutex_init(&locks_root->lock);
3374 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3375 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3376 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3378 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3380 btrfs_bio_counter_sub(fs_info, 1);
3384 struct reada_control {
3385 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3386 struct btrfs_key key_start;
3387 struct btrfs_key key_end; /* exclusive */
3390 wait_queue_head_t wait;
3392 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3393 struct btrfs_key *start, struct btrfs_key *end);
3394 int btrfs_reada_wait(void *handle);
3395 void btrfs_reada_detach(void *handle);
3396 int btree_readahead_hook(struct extent_buffer *eb, int err);
3398 static inline int is_fstree(u64 rootid)
3400 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3401 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3402 !btrfs_qgroup_level(rootid)))
3407 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3409 return signal_pending(current);
3412 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3414 /* Sanity test specific functions */
3415 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3416 void btrfs_test_inode_set_ops(struct inode *inode);
3417 void btrfs_test_destroy_inode(struct inode *inode);
3419 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3421 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3424 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)