1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
34 #include "block-rsv.h"
36 struct btrfs_trans_handle;
37 struct btrfs_transaction;
38 struct btrfs_pending_snapshot;
39 struct btrfs_delayed_ref_root;
40 struct btrfs_space_info;
41 struct btrfs_block_group_cache;
42 extern struct kmem_cache *btrfs_trans_handle_cachep;
43 extern struct kmem_cache *btrfs_bit_radix_cachep;
44 extern struct kmem_cache *btrfs_path_cachep;
45 extern struct kmem_cache *btrfs_free_space_cachep;
46 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
47 struct btrfs_ordered_sum;
50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
53 * Maximum number of mirrors that can be available for all profiles counting
54 * the target device of dev-replace as one. During an active device replace
55 * procedure, the target device of the copy operation is a mirror for the
56 * filesystem data as well that can be used to read data in order to repair
57 * read errors on other disks.
59 * Current value is derived from RAID1 with 2 copies.
61 #define BTRFS_MAX_MIRRORS (2 + 1)
63 #define BTRFS_MAX_LEVEL 8
65 #define BTRFS_OLDEST_GENERATION 0ULL
68 * the max metadata block size. This limit is somewhat artificial,
69 * but the memmove costs go through the roof for larger blocks.
71 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
74 * we can actually store much bigger names, but lets not confuse the rest
77 #define BTRFS_NAME_LEN 255
80 * Theoretical limit is larger, but we keep this down to a sane
81 * value. That should limit greatly the possibility of collisions on
84 #define BTRFS_LINK_MAX 65535U
86 #define BTRFS_EMPTY_DIR_SIZE 0
88 /* ioprio of readahead is set to idle */
89 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
91 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
94 * Use large batch size to reduce overhead of metadata updates. On the reader
95 * side, we only read it when we are close to ENOSPC and the read overhead is
96 * mostly related to the number of CPUs, so it is OK to use arbitrary large
99 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
101 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
105 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
107 static inline u32 count_max_extents(u64 size)
109 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
112 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
114 BUG_ON(num_stripes == 0);
115 return sizeof(struct btrfs_chunk) +
116 sizeof(struct btrfs_stripe) * (num_stripes - 1);
120 * Runtime (in-memory) states of filesystem
123 /* Global indicator of serious filesystem errors */
124 BTRFS_FS_STATE_ERROR,
126 * Filesystem is being remounted, allow to skip some operations, like
129 BTRFS_FS_STATE_REMOUNTING,
130 /* Track if a transaction abort has been reported on this filesystem */
131 BTRFS_FS_STATE_TRANS_ABORTED,
133 * Bio operations should be blocked on this filesystem because a source
134 * or target device is being destroyed as part of a device replace
136 BTRFS_FS_STATE_DEV_REPLACING,
137 /* The btrfs_fs_info created for self-tests */
138 BTRFS_FS_STATE_DUMMY_FS_INFO,
141 #define BTRFS_BACKREF_REV_MAX 256
142 #define BTRFS_BACKREF_REV_SHIFT 56
143 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
144 BTRFS_BACKREF_REV_SHIFT)
146 #define BTRFS_OLD_BACKREF_REV 0
147 #define BTRFS_MIXED_BACKREF_REV 1
150 * every tree block (leaf or node) starts with this header.
152 struct btrfs_header {
153 /* these first four must match the super block */
154 u8 csum[BTRFS_CSUM_SIZE];
155 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
156 __le64 bytenr; /* which block this node is supposed to live in */
159 /* allowed to be different from the super from here on down */
160 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
165 } __attribute__ ((__packed__));
168 * this is a very generous portion of the super block, giving us
169 * room to translate 14 chunks with 3 stripes each.
171 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
174 * just in case we somehow lose the roots and are not able to mount,
175 * we store an array of the roots from previous transactions
178 #define BTRFS_NUM_BACKUP_ROOTS 4
179 struct btrfs_root_backup {
181 __le64 tree_root_gen;
184 __le64 chunk_root_gen;
187 __le64 extent_root_gen;
196 __le64 csum_root_gen;
206 u8 extent_root_level;
210 /* future and to align */
212 } __attribute__ ((__packed__));
215 * the super block basically lists the main trees of the FS
216 * it currently lacks any block count etc etc
218 struct btrfs_super_block {
219 /* the first 4 fields must match struct btrfs_header */
220 u8 csum[BTRFS_CSUM_SIZE];
221 /* FS specific UUID, visible to user */
222 u8 fsid[BTRFS_FSID_SIZE];
223 __le64 bytenr; /* this block number */
226 /* allowed to be different from the btrfs_header from here own down */
233 /* this will help find the new super based on the log root */
234 __le64 log_root_transid;
237 __le64 root_dir_objectid;
241 __le32 __unused_leafsize;
243 __le32 sys_chunk_array_size;
244 __le64 chunk_root_generation;
246 __le64 compat_ro_flags;
247 __le64 incompat_flags;
252 struct btrfs_dev_item dev_item;
254 char label[BTRFS_LABEL_SIZE];
256 __le64 cache_generation;
257 __le64 uuid_tree_generation;
259 /* the UUID written into btree blocks */
260 u8 metadata_uuid[BTRFS_FSID_SIZE];
262 /* future expansion */
264 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
265 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
266 } __attribute__ ((__packed__));
269 * Compat flags that we support. If any incompat flags are set other than the
270 * ones specified below then we will fail to mount
272 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
273 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
274 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
276 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
277 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
278 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
280 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
281 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
283 #define BTRFS_FEATURE_INCOMPAT_SUPP \
284 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
285 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
286 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
287 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
288 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
289 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
290 BTRFS_FEATURE_INCOMPAT_RAID56 | \
291 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
292 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
293 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
294 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
296 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
297 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
298 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
301 * A leaf is full of items. offset and size tell us where to find
302 * the item in the leaf (relative to the start of the data area)
305 struct btrfs_disk_key key;
308 } __attribute__ ((__packed__));
311 * leaves have an item area and a data area:
312 * [item0, item1....itemN] [free space] [dataN...data1, data0]
314 * The data is separate from the items to get the keys closer together
318 struct btrfs_header header;
319 struct btrfs_item items[];
320 } __attribute__ ((__packed__));
323 * all non-leaf blocks are nodes, they hold only keys and pointers to
326 struct btrfs_key_ptr {
327 struct btrfs_disk_key key;
330 } __attribute__ ((__packed__));
333 struct btrfs_header header;
334 struct btrfs_key_ptr ptrs[];
335 } __attribute__ ((__packed__));
338 * btrfs_paths remember the path taken from the root down to the leaf.
339 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
340 * to any other levels that are present.
342 * The slots array records the index of the item or block pointer
343 * used while walking the tree.
345 enum { READA_NONE, READA_BACK, READA_FORWARD };
347 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
348 int slots[BTRFS_MAX_LEVEL];
349 /* if there is real range locking, this locks field will change */
350 u8 locks[BTRFS_MAX_LEVEL];
352 /* keep some upper locks as we walk down */
356 * set by btrfs_split_item, tells search_slot to keep all locks
357 * and to force calls to keep space in the nodes
359 unsigned int search_for_split:1;
360 unsigned int keep_locks:1;
361 unsigned int skip_locking:1;
362 unsigned int leave_spinning:1;
363 unsigned int search_commit_root:1;
364 unsigned int need_commit_sem:1;
365 unsigned int skip_release_on_error:1;
367 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
368 sizeof(struct btrfs_item))
369 struct btrfs_dev_replace {
370 u64 replace_state; /* see #define above */
371 time64_t time_started; /* seconds since 1-Jan-1970 */
372 time64_t time_stopped; /* seconds since 1-Jan-1970 */
373 atomic64_t num_write_errors;
374 atomic64_t num_uncorrectable_read_errors;
377 u64 committed_cursor_left;
378 u64 cursor_left_last_write_of_item;
381 u64 cont_reading_from_srcdev_mode; /* see #define above */
384 int item_needs_writeback;
385 struct btrfs_device *srcdev;
386 struct btrfs_device *tgtdev;
388 struct mutex lock_finishing_cancel_unmount;
389 struct rw_semaphore rwsem;
391 struct btrfs_scrub_progress scrub_progress;
393 struct percpu_counter bio_counter;
394 wait_queue_head_t replace_wait;
398 * free clusters are used to claim free space in relatively large chunks,
399 * allowing us to do less seeky writes. They are used for all metadata
400 * allocations. In ssd_spread mode they are also used for data allocations.
402 struct btrfs_free_cluster {
404 spinlock_t refill_lock;
407 /* largest extent in this cluster */
410 /* first extent starting offset */
413 /* We did a full search and couldn't create a cluster */
416 struct btrfs_block_group_cache *block_group;
418 * when a cluster is allocated from a block group, we put the
419 * cluster onto a list in the block group so that it can
420 * be freed before the block group is freed.
422 struct list_head block_group_list;
425 enum btrfs_caching_type {
429 BTRFS_CACHE_FINISHED,
434 * Tree to record all locked full stripes of a RAID5/6 block group
436 struct btrfs_full_stripe_locks_tree {
441 /* delayed seq elem */
443 struct list_head list;
447 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
449 #define SEQ_LAST ((u64)-1)
451 enum btrfs_orphan_cleanup_state {
452 ORPHAN_CLEANUP_STARTED = 1,
453 ORPHAN_CLEANUP_DONE = 2,
456 void btrfs_init_async_reclaim_work(struct work_struct *work);
459 struct reloc_control;
461 struct btrfs_fs_devices;
462 struct btrfs_balance_control;
463 struct btrfs_delayed_root;
466 * Block group or device which contains an active swapfile. Used for preventing
467 * unsafe operations while a swapfile is active.
469 * These are sorted on (ptr, inode) (note that a block group or device can
470 * contain more than one swapfile). We compare the pointer values because we
471 * don't actually care what the object is, we just need a quick check whether
472 * the object exists in the rbtree.
474 struct btrfs_swapfile_pin {
479 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
480 * ptr points to a struct btrfs_device.
485 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
489 BTRFS_FS_CLOSING_START,
490 BTRFS_FS_CLOSING_DONE,
491 BTRFS_FS_LOG_RECOVERING,
493 BTRFS_FS_QUOTA_ENABLED,
494 BTRFS_FS_UPDATE_UUID_TREE_GEN,
495 BTRFS_FS_CREATING_FREE_SPACE_TREE,
499 BTRFS_FS_QUOTA_OVERRIDE,
500 /* Used to record internally whether fs has been frozen */
503 * Indicate that a whole-filesystem exclusive operation is running
504 * (device replace, resize, device add/delete, balance)
508 * To info transaction_kthread we need an immediate commit so it
509 * doesn't need to wait for commit_interval
511 BTRFS_FS_NEED_ASYNC_COMMIT,
513 * Indicate that balance has been set up from the ioctl and is in the
514 * main phase. The fs_info::balance_ctl is initialized.
515 * Set and cleared while holding fs_info::balance_mutex.
517 BTRFS_FS_BALANCE_RUNNING,
519 /* Indicate that the cleaner thread is awake and doing something. */
520 BTRFS_FS_CLEANER_RUNNING,
523 * The checksumming has an optimized version and is considered fast,
524 * so we don't need to offload checksums to workqueues.
526 BTRFS_FS_CSUM_IMPL_FAST,
529 struct btrfs_fs_info {
530 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
532 struct btrfs_root *extent_root;
533 struct btrfs_root *tree_root;
534 struct btrfs_root *chunk_root;
535 struct btrfs_root *dev_root;
536 struct btrfs_root *fs_root;
537 struct btrfs_root *csum_root;
538 struct btrfs_root *quota_root;
539 struct btrfs_root *uuid_root;
540 struct btrfs_root *free_space_root;
542 /* the log root tree is a directory of all the other log roots */
543 struct btrfs_root *log_root_tree;
545 spinlock_t fs_roots_radix_lock;
546 struct radix_tree_root fs_roots_radix;
548 /* block group cache stuff */
549 spinlock_t block_group_cache_lock;
550 u64 first_logical_byte;
551 struct rb_root block_group_cache_tree;
553 /* keep track of unallocated space */
554 atomic64_t free_chunk_space;
556 struct extent_io_tree freed_extents[2];
557 struct extent_io_tree *pinned_extents;
559 /* logical->physical extent mapping */
560 struct extent_map_tree mapping_tree;
563 * block reservation for extent, checksum, root tree and
564 * delayed dir index item
566 struct btrfs_block_rsv global_block_rsv;
567 /* block reservation for metadata operations */
568 struct btrfs_block_rsv trans_block_rsv;
569 /* block reservation for chunk tree */
570 struct btrfs_block_rsv chunk_block_rsv;
571 /* block reservation for delayed operations */
572 struct btrfs_block_rsv delayed_block_rsv;
573 /* block reservation for delayed refs */
574 struct btrfs_block_rsv delayed_refs_rsv;
576 struct btrfs_block_rsv empty_block_rsv;
579 u64 last_trans_committed;
580 u64 avg_delayed_ref_runtime;
583 * this is updated to the current trans every time a full commit
584 * is required instead of the faster short fsync log commits
586 u64 last_trans_log_full_commit;
587 unsigned long mount_opt;
589 * Track requests for actions that need to be done during transaction
590 * commit (like for some mount options).
592 unsigned long pending_changes;
593 unsigned long compress_type:4;
594 unsigned int compress_level;
597 * It is a suggestive number, the read side is safe even it gets a
598 * wrong number because we will write out the data into a regular
599 * extent. The write side(mount/remount) is under ->s_umount lock,
600 * so it is also safe.
604 struct btrfs_transaction *running_transaction;
605 wait_queue_head_t transaction_throttle;
606 wait_queue_head_t transaction_wait;
607 wait_queue_head_t transaction_blocked_wait;
608 wait_queue_head_t async_submit_wait;
611 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
612 * when they are updated.
614 * Because we do not clear the flags for ever, so we needn't use
615 * the lock on the read side.
617 * We also needn't use the lock when we mount the fs, because
618 * there is no other task which will update the flag.
620 spinlock_t super_lock;
621 struct btrfs_super_block *super_copy;
622 struct btrfs_super_block *super_for_commit;
623 struct super_block *sb;
624 struct inode *btree_inode;
625 struct mutex tree_log_mutex;
626 struct mutex transaction_kthread_mutex;
627 struct mutex cleaner_mutex;
628 struct mutex chunk_mutex;
631 * this is taken to make sure we don't set block groups ro after
632 * the free space cache has been allocated on them
634 struct mutex ro_block_group_mutex;
636 /* this is used during read/modify/write to make sure
637 * no two ios are trying to mod the same stripe at the same
640 struct btrfs_stripe_hash_table *stripe_hash_table;
643 * this protects the ordered operations list only while we are
644 * processing all of the entries on it. This way we make
645 * sure the commit code doesn't find the list temporarily empty
646 * because another function happens to be doing non-waiting preflush
647 * before jumping into the main commit.
649 struct mutex ordered_operations_mutex;
651 struct rw_semaphore commit_root_sem;
653 struct rw_semaphore cleanup_work_sem;
655 struct rw_semaphore subvol_sem;
656 struct srcu_struct subvol_srcu;
658 spinlock_t trans_lock;
660 * the reloc mutex goes with the trans lock, it is taken
661 * during commit to protect us from the relocation code
663 struct mutex reloc_mutex;
665 struct list_head trans_list;
666 struct list_head dead_roots;
667 struct list_head caching_block_groups;
669 spinlock_t delayed_iput_lock;
670 struct list_head delayed_iputs;
671 atomic_t nr_delayed_iputs;
672 wait_queue_head_t delayed_iputs_wait;
674 /* this protects tree_mod_seq_list */
675 spinlock_t tree_mod_seq_lock;
676 atomic64_t tree_mod_seq;
677 struct list_head tree_mod_seq_list;
679 /* this protects tree_mod_log */
680 rwlock_t tree_mod_log_lock;
681 struct rb_root tree_mod_log;
683 atomic_t async_delalloc_pages;
686 * this is used to protect the following list -- ordered_roots.
688 spinlock_t ordered_root_lock;
691 * all fs/file tree roots in which there are data=ordered extents
692 * pending writeback are added into this list.
694 * these can span multiple transactions and basically include
695 * every dirty data page that isn't from nodatacow
697 struct list_head ordered_roots;
699 struct mutex delalloc_root_mutex;
700 spinlock_t delalloc_root_lock;
701 /* all fs/file tree roots that have delalloc inodes. */
702 struct list_head delalloc_roots;
705 * there is a pool of worker threads for checksumming during writes
706 * and a pool for checksumming after reads. This is because readers
707 * can run with FS locks held, and the writers may be waiting for
708 * those locks. We don't want ordering in the pending list to cause
709 * deadlocks, and so the two are serviced separately.
711 * A third pool does submit_bio to avoid deadlocking with the other
714 struct btrfs_workqueue *workers;
715 struct btrfs_workqueue *delalloc_workers;
716 struct btrfs_workqueue *flush_workers;
717 struct btrfs_workqueue *endio_workers;
718 struct btrfs_workqueue *endio_meta_workers;
719 struct btrfs_workqueue *endio_raid56_workers;
720 struct btrfs_workqueue *endio_repair_workers;
721 struct btrfs_workqueue *rmw_workers;
722 struct btrfs_workqueue *endio_meta_write_workers;
723 struct btrfs_workqueue *endio_write_workers;
724 struct btrfs_workqueue *endio_freespace_worker;
725 struct btrfs_workqueue *submit_workers;
726 struct btrfs_workqueue *caching_workers;
727 struct btrfs_workqueue *readahead_workers;
730 * fixup workers take dirty pages that didn't properly go through
731 * the cow mechanism and make them safe to write. It happens
732 * for the sys_munmap function call path
734 struct btrfs_workqueue *fixup_workers;
735 struct btrfs_workqueue *delayed_workers;
737 /* the extent workers do delayed refs on the extent allocation tree */
738 struct btrfs_workqueue *extent_workers;
739 struct task_struct *transaction_kthread;
740 struct task_struct *cleaner_kthread;
741 u32 thread_pool_size;
743 struct kobject *space_info_kobj;
747 /* used to keep from writing metadata until there is a nice batch */
748 struct percpu_counter dirty_metadata_bytes;
749 struct percpu_counter delalloc_bytes;
750 struct percpu_counter dio_bytes;
751 s32 dirty_metadata_batch;
754 struct list_head dirty_cowonly_roots;
756 struct btrfs_fs_devices *fs_devices;
759 * The space_info list is effectively read only after initial
760 * setup. It is populated at mount time and cleaned up after
761 * all block groups are removed. RCU is used to protect it.
763 struct list_head space_info;
765 struct btrfs_space_info *data_sinfo;
767 struct reloc_control *reloc_ctl;
769 /* data_alloc_cluster is only used in ssd_spread mode */
770 struct btrfs_free_cluster data_alloc_cluster;
772 /* all metadata allocations go through this cluster */
773 struct btrfs_free_cluster meta_alloc_cluster;
775 /* auto defrag inodes go here */
776 spinlock_t defrag_inodes_lock;
777 struct rb_root defrag_inodes;
778 atomic_t defrag_running;
780 /* Used to protect avail_{data, metadata, system}_alloc_bits */
781 seqlock_t profiles_lock;
783 * these three are in extended format (availability of single
784 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
785 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
787 u64 avail_data_alloc_bits;
788 u64 avail_metadata_alloc_bits;
789 u64 avail_system_alloc_bits;
791 /* restriper state */
792 spinlock_t balance_lock;
793 struct mutex balance_mutex;
794 atomic_t balance_pause_req;
795 atomic_t balance_cancel_req;
796 struct btrfs_balance_control *balance_ctl;
797 wait_queue_head_t balance_wait_q;
799 u32 data_chunk_allocations;
804 /* private scrub information */
805 struct mutex scrub_lock;
806 atomic_t scrubs_running;
807 atomic_t scrub_pause_req;
808 atomic_t scrubs_paused;
809 atomic_t scrub_cancel_req;
810 wait_queue_head_t scrub_pause_wait;
812 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
815 refcount_t scrub_workers_refcnt;
816 struct btrfs_workqueue *scrub_workers;
817 struct btrfs_workqueue *scrub_wr_completion_workers;
818 struct btrfs_workqueue *scrub_parity_workers;
820 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
821 u32 check_integrity_print_mask;
823 /* is qgroup tracking in a consistent state? */
826 /* holds configuration and tracking. Protected by qgroup_lock */
827 struct rb_root qgroup_tree;
828 spinlock_t qgroup_lock;
831 * used to avoid frequently calling ulist_alloc()/ulist_free()
832 * when doing qgroup accounting, it must be protected by qgroup_lock.
834 struct ulist *qgroup_ulist;
836 /* protect user change for quota operations */
837 struct mutex qgroup_ioctl_lock;
839 /* list of dirty qgroups to be written at next commit */
840 struct list_head dirty_qgroups;
842 /* used by qgroup for an efficient tree traversal */
845 /* qgroup rescan items */
846 struct mutex qgroup_rescan_lock; /* protects the progress item */
847 struct btrfs_key qgroup_rescan_progress;
848 struct btrfs_workqueue *qgroup_rescan_workers;
849 struct completion qgroup_rescan_completion;
850 struct btrfs_work qgroup_rescan_work;
851 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
853 /* filesystem state */
854 unsigned long fs_state;
856 struct btrfs_delayed_root *delayed_root;
859 spinlock_t reada_lock;
860 struct radix_tree_root reada_tree;
862 /* readahead works cnt */
863 atomic_t reada_works_cnt;
865 /* Extent buffer radix tree */
866 spinlock_t buffer_lock;
867 struct radix_tree_root buffer_radix;
869 /* next backup root to be overwritten */
870 int backup_root_index;
872 /* device replace state */
873 struct btrfs_dev_replace dev_replace;
875 struct semaphore uuid_tree_rescan_sem;
877 /* Used to reclaim the metadata space in the background. */
878 struct work_struct async_reclaim_work;
880 spinlock_t unused_bgs_lock;
881 struct list_head unused_bgs;
882 struct mutex unused_bg_unpin_mutex;
883 struct mutex delete_unused_bgs_mutex;
885 /* Cached block sizes */
890 /* Block groups and devices containing active swapfiles. */
891 spinlock_t swapfile_pins_lock;
892 struct rb_root swapfile_pins;
894 struct crypto_shash *csum_shash;
897 * Number of send operations in progress.
898 * Updated while holding fs_info::balance_mutex.
900 int send_in_progress;
902 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
903 spinlock_t ref_verify_lock;
904 struct rb_root block_tree;
908 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
910 return sb->s_fs_info;
913 struct btrfs_subvolume_writers {
914 struct percpu_counter counter;
915 wait_queue_head_t wait;
919 * The state of btrfs root
923 * btrfs_record_root_in_trans is a multi-step process, and it can race
924 * with the balancing code. But the race is very small, and only the
925 * first time the root is added to each transaction. So IN_TRANS_SETUP
926 * is used to tell us when more checks are required
928 BTRFS_ROOT_IN_TRANS_SETUP,
930 BTRFS_ROOT_TRACK_DIRTY,
932 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
933 BTRFS_ROOT_DEFRAG_RUNNING,
934 BTRFS_ROOT_FORCE_COW,
935 BTRFS_ROOT_MULTI_LOG_TASKS,
940 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
942 * Set for the subvolume tree owning the reloc tree.
944 BTRFS_ROOT_DEAD_RELOC_TREE,
945 /* Mark dead root stored on device whose cleanup needs to be resumed */
946 BTRFS_ROOT_DEAD_TREE,
950 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
951 * code. For detail check comment in fs/btrfs/qgroup.c.
953 struct btrfs_qgroup_swapped_blocks {
955 /* RM_EMPTY_ROOT() of above blocks[] */
957 struct rb_root blocks[BTRFS_MAX_LEVEL];
961 * in ram representation of the tree. extent_root is used for all allocations
962 * and for the extent tree extent_root root.
965 struct extent_buffer *node;
967 struct extent_buffer *commit_root;
968 struct btrfs_root *log_root;
969 struct btrfs_root *reloc_root;
972 struct btrfs_root_item root_item;
973 struct btrfs_key root_key;
974 struct btrfs_fs_info *fs_info;
975 struct extent_io_tree dirty_log_pages;
977 struct mutex objectid_mutex;
979 spinlock_t accounting_lock;
980 struct btrfs_block_rsv *block_rsv;
982 /* free ino cache stuff */
983 struct btrfs_free_space_ctl *free_ino_ctl;
984 enum btrfs_caching_type ino_cache_state;
985 spinlock_t ino_cache_lock;
986 wait_queue_head_t ino_cache_wait;
987 struct btrfs_free_space_ctl *free_ino_pinned;
988 u64 ino_cache_progress;
989 struct inode *ino_cache_inode;
991 struct mutex log_mutex;
992 wait_queue_head_t log_writer_wait;
993 wait_queue_head_t log_commit_wait[2];
994 struct list_head log_ctxs[2];
995 atomic_t log_writers;
996 atomic_t log_commit[2];
999 /* No matter the commit succeeds or not*/
1000 int log_transid_committed;
1001 /* Just be updated when the commit succeeds. */
1002 int last_log_commit;
1003 pid_t log_start_pid;
1009 u64 highest_objectid;
1011 u64 defrag_trans_start;
1012 struct btrfs_key defrag_progress;
1013 struct btrfs_key defrag_max;
1015 /* the dirty list is only used by non-reference counted roots */
1016 struct list_head dirty_list;
1018 struct list_head root_list;
1020 spinlock_t log_extents_lock[2];
1021 struct list_head logged_list[2];
1023 int orphan_cleanup_state;
1025 spinlock_t inode_lock;
1026 /* red-black tree that keeps track of in-memory inodes */
1027 struct rb_root inode_tree;
1030 * radix tree that keeps track of delayed nodes of every inode,
1031 * protected by inode_lock
1033 struct radix_tree_root delayed_nodes_tree;
1035 * right now this just gets used so that a root has its own devid
1036 * for stat. It may be used for more later
1040 spinlock_t root_item_lock;
1043 struct mutex delalloc_mutex;
1044 spinlock_t delalloc_lock;
1046 * all of the inodes that have delalloc bytes. It is possible for
1047 * this list to be empty even when there is still dirty data=ordered
1048 * extents waiting to finish IO.
1050 struct list_head delalloc_inodes;
1051 struct list_head delalloc_root;
1052 u64 nr_delalloc_inodes;
1054 struct mutex ordered_extent_mutex;
1056 * this is used by the balancing code to wait for all the pending
1059 spinlock_t ordered_extent_lock;
1062 * all of the data=ordered extents pending writeback
1063 * these can span multiple transactions and basically include
1064 * every dirty data page that isn't from nodatacow
1066 struct list_head ordered_extents;
1067 struct list_head ordered_root;
1068 u64 nr_ordered_extents;
1071 * Not empty if this subvolume root has gone through tree block swap
1074 * Will be used by reloc_control::dirty_subvol_roots.
1076 struct list_head reloc_dirty_list;
1079 * Number of currently running SEND ioctls to prevent
1080 * manipulation with the read-only status via SUBVOL_SETFLAGS
1082 int send_in_progress;
1084 * Number of currently running deduplication operations that have a
1085 * destination inode belonging to this root. Protected by the lock
1088 int dedupe_in_progress;
1089 struct btrfs_subvolume_writers *subv_writers;
1090 atomic_t will_be_snapshotted;
1091 atomic_t snapshot_force_cow;
1093 /* For qgroup metadata reserved space */
1094 spinlock_t qgroup_meta_rsv_lock;
1095 u64 qgroup_meta_rsv_pertrans;
1096 u64 qgroup_meta_rsv_prealloc;
1098 /* Number of active swapfiles */
1099 atomic_t nr_swapfiles;
1101 /* Record pairs of swapped blocks for qgroup */
1102 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1104 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1109 struct btrfs_clone_extent_info {
1119 struct btrfs_file_private {
1123 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1125 return btrfs_sb(inode->i_sb)->sectorsize;
1128 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1131 return info->nodesize - sizeof(struct btrfs_header);
1134 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1136 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1138 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1141 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1143 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1146 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1147 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1148 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1150 return BTRFS_MAX_ITEM_SIZE(info) -
1151 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1154 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1156 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1160 * Flags for mount options.
1162 * Note: don't forget to add new options to btrfs_show_options()
1164 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1165 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1166 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1167 #define BTRFS_MOUNT_SSD (1 << 3)
1168 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1169 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1170 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1171 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1172 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1173 #define BTRFS_MOUNT_NOSSD (1 << 9)
1174 #define BTRFS_MOUNT_DISCARD (1 << 10)
1175 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1176 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1177 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1178 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1179 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1180 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1181 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1182 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1183 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1184 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1185 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1186 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1187 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1188 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1189 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1190 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1191 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1192 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1194 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1195 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1197 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1198 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1199 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1200 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1203 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1205 if (!btrfs_test_opt(fs_info, opt)) \
1206 btrfs_info(fs_info, fmt, ##args); \
1207 btrfs_set_opt(fs_info->mount_opt, opt); \
1210 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1212 if (btrfs_test_opt(fs_info, opt)) \
1213 btrfs_info(fs_info, fmt, ##args); \
1214 btrfs_clear_opt(fs_info->mount_opt, opt); \
1218 * Requests for changes that need to be done during transaction commit.
1220 * Internal mount options that are used for special handling of the real
1221 * mount options (eg. cannot be set during remount and have to be set during
1222 * transaction commit)
1225 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1226 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1227 #define BTRFS_PENDING_COMMIT (2)
1229 #define btrfs_test_pending(info, opt) \
1230 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1231 #define btrfs_set_pending(info, opt) \
1232 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1233 #define btrfs_clear_pending(info, opt) \
1234 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1237 * Helpers for setting pending mount option changes.
1239 * Expects corresponding macros
1240 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1242 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1244 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1245 btrfs_info((info), fmt, ##args); \
1246 btrfs_set_pending((info), SET_##opt); \
1247 btrfs_clear_pending((info), CLEAR_##opt); \
1251 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1253 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1254 btrfs_info((info), fmt, ##args); \
1255 btrfs_set_pending((info), CLEAR_##opt); \
1256 btrfs_clear_pending((info), SET_##opt); \
1263 #define BTRFS_INODE_NODATASUM (1 << 0)
1264 #define BTRFS_INODE_NODATACOW (1 << 1)
1265 #define BTRFS_INODE_READONLY (1 << 2)
1266 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1267 #define BTRFS_INODE_PREALLOC (1 << 4)
1268 #define BTRFS_INODE_SYNC (1 << 5)
1269 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1270 #define BTRFS_INODE_APPEND (1 << 7)
1271 #define BTRFS_INODE_NODUMP (1 << 8)
1272 #define BTRFS_INODE_NOATIME (1 << 9)
1273 #define BTRFS_INODE_DIRSYNC (1 << 10)
1274 #define BTRFS_INODE_COMPRESS (1 << 11)
1276 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1278 #define BTRFS_INODE_FLAG_MASK \
1279 (BTRFS_INODE_NODATASUM | \
1280 BTRFS_INODE_NODATACOW | \
1281 BTRFS_INODE_READONLY | \
1282 BTRFS_INODE_NOCOMPRESS | \
1283 BTRFS_INODE_PREALLOC | \
1284 BTRFS_INODE_SYNC | \
1285 BTRFS_INODE_IMMUTABLE | \
1286 BTRFS_INODE_APPEND | \
1287 BTRFS_INODE_NODUMP | \
1288 BTRFS_INODE_NOATIME | \
1289 BTRFS_INODE_DIRSYNC | \
1290 BTRFS_INODE_COMPRESS | \
1291 BTRFS_INODE_ROOT_ITEM_INIT)
1293 struct btrfs_map_token {
1294 const struct extent_buffer *eb;
1296 unsigned long offset;
1299 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1300 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1302 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1303 struct extent_buffer *eb)
1306 token->kaddr = NULL;
1309 /* some macros to generate set/get functions for the struct fields. This
1310 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1313 #define le8_to_cpu(v) (v)
1314 #define cpu_to_le8(v) (v)
1317 #define read_eb_member(eb, ptr, type, member, result) (\
1318 read_extent_buffer(eb, (char *)(result), \
1319 ((unsigned long)(ptr)) + \
1320 offsetof(type, member), \
1321 sizeof(((type *)0)->member)))
1323 #define write_eb_member(eb, ptr, type, member, result) (\
1324 write_extent_buffer(eb, (char *)(result), \
1325 ((unsigned long)(ptr)) + \
1326 offsetof(type, member), \
1327 sizeof(((type *)0)->member)))
1329 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1330 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1331 const void *ptr, unsigned long off, \
1332 struct btrfs_map_token *token); \
1333 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1334 unsigned long off, u##bits val, \
1335 struct btrfs_map_token *token); \
1336 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1337 const void *ptr, unsigned long off); \
1338 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1339 unsigned long off, u##bits val);
1341 DECLARE_BTRFS_SETGET_BITS(8)
1342 DECLARE_BTRFS_SETGET_BITS(16)
1343 DECLARE_BTRFS_SETGET_BITS(32)
1344 DECLARE_BTRFS_SETGET_BITS(64)
1346 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1347 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1350 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1351 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1353 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1356 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1357 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1359 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1361 struct btrfs_map_token *token) \
1363 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1364 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1366 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1367 type *s, u##bits val, \
1368 struct btrfs_map_token *token) \
1370 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1371 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1374 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1375 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1377 const type *p = page_address(eb->pages[0]); \
1378 u##bits res = le##bits##_to_cpu(p->member); \
1381 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1384 type *p = page_address(eb->pages[0]); \
1385 p->member = cpu_to_le##bits(val); \
1388 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1389 static inline u##bits btrfs_##name(const type *s) \
1391 return le##bits##_to_cpu(s->member); \
1393 static inline void btrfs_set_##name(type *s, u##bits val) \
1395 s->member = cpu_to_le##bits(val); \
1399 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1400 struct btrfs_dev_item *s)
1402 BUILD_BUG_ON(sizeof(u64) !=
1403 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1404 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1407 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1408 struct btrfs_dev_item *s,
1411 BUILD_BUG_ON(sizeof(u64) !=
1412 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1413 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1414 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1418 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1419 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1420 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1421 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1422 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1424 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1425 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1426 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1427 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1428 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1429 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1431 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1432 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1434 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1436 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1438 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1440 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1442 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1443 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1445 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1447 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1449 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1452 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1454 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1457 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1459 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1462 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1463 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1464 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1465 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1466 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1467 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1468 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1469 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1470 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1471 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1472 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1474 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1476 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1479 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1480 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1481 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1483 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1485 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1487 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1489 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1490 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1492 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1494 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1495 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1497 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1500 unsigned long offset = (unsigned long)c;
1501 offset += offsetof(struct btrfs_chunk, stripe);
1502 offset += nr * sizeof(struct btrfs_stripe);
1503 return (struct btrfs_stripe *)offset;
1506 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1508 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1511 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1512 struct btrfs_chunk *c, int nr)
1514 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1517 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1518 struct btrfs_chunk *c, int nr)
1520 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1523 /* struct btrfs_block_group_item */
1524 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1526 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1528 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1529 struct btrfs_block_group_item, chunk_objectid, 64);
1531 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1532 struct btrfs_block_group_item, chunk_objectid, 64);
1533 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1534 struct btrfs_block_group_item, flags, 64);
1535 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1536 struct btrfs_block_group_item, flags, 64);
1538 /* struct btrfs_free_space_info */
1539 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1541 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1543 /* struct btrfs_inode_ref */
1544 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1545 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1547 /* struct btrfs_inode_extref */
1548 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1549 parent_objectid, 64);
1550 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1552 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1554 /* struct btrfs_inode_item */
1555 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1556 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1557 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1558 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1559 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1560 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1561 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1562 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1563 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1564 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1565 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1566 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1567 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1569 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1571 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1573 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1574 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1576 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1578 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1579 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1580 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1581 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1582 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1583 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1584 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1585 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1586 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1587 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1589 /* struct btrfs_dev_extent */
1590 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1592 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1593 chunk_objectid, 64);
1594 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1596 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1598 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1600 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1601 return (unsigned long)dev + ptr;
1604 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1605 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1607 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1609 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1612 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1614 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1615 struct btrfs_tree_block_info *item,
1616 struct btrfs_disk_key *key)
1618 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1621 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1622 struct btrfs_tree_block_info *item,
1623 struct btrfs_disk_key *key)
1625 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1628 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1630 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1632 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1634 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1637 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1640 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1642 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1645 static inline u32 btrfs_extent_inline_ref_size(int type)
1647 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1648 type == BTRFS_SHARED_BLOCK_REF_KEY)
1649 return sizeof(struct btrfs_extent_inline_ref);
1650 if (type == BTRFS_SHARED_DATA_REF_KEY)
1651 return sizeof(struct btrfs_shared_data_ref) +
1652 sizeof(struct btrfs_extent_inline_ref);
1653 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1654 return sizeof(struct btrfs_extent_data_ref) +
1655 offsetof(struct btrfs_extent_inline_ref, offset);
1659 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1660 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1662 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1663 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1665 /* struct btrfs_node */
1666 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1667 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1668 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1670 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1673 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1676 ptr = offsetof(struct btrfs_node, ptrs) +
1677 sizeof(struct btrfs_key_ptr) * nr;
1678 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1681 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1685 ptr = offsetof(struct btrfs_node, ptrs) +
1686 sizeof(struct btrfs_key_ptr) * nr;
1687 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1690 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1693 ptr = offsetof(struct btrfs_node, ptrs) +
1694 sizeof(struct btrfs_key_ptr) * nr;
1695 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1698 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1702 ptr = offsetof(struct btrfs_node, ptrs) +
1703 sizeof(struct btrfs_key_ptr) * nr;
1704 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1707 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1709 return offsetof(struct btrfs_node, ptrs) +
1710 sizeof(struct btrfs_key_ptr) * nr;
1713 void btrfs_node_key(const struct extent_buffer *eb,
1714 struct btrfs_disk_key *disk_key, int nr);
1716 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1717 struct btrfs_disk_key *disk_key, int nr)
1720 ptr = btrfs_node_key_ptr_offset(nr);
1721 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1722 struct btrfs_key_ptr, key, disk_key);
1725 /* struct btrfs_item */
1726 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1727 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1728 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1729 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1731 static inline unsigned long btrfs_item_nr_offset(int nr)
1733 return offsetof(struct btrfs_leaf, items) +
1734 sizeof(struct btrfs_item) * nr;
1737 static inline struct btrfs_item *btrfs_item_nr(int nr)
1739 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1742 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1743 struct btrfs_item *item)
1745 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1748 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1750 return btrfs_item_end(eb, btrfs_item_nr(nr));
1753 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1755 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1758 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1760 return btrfs_item_size(eb, btrfs_item_nr(nr));
1763 static inline void btrfs_item_key(const struct extent_buffer *eb,
1764 struct btrfs_disk_key *disk_key, int nr)
1766 struct btrfs_item *item = btrfs_item_nr(nr);
1767 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1770 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1771 struct btrfs_disk_key *disk_key, int nr)
1773 struct btrfs_item *item = btrfs_item_nr(nr);
1774 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1777 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1780 * struct btrfs_root_ref
1782 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1783 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1784 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1786 /* struct btrfs_dir_item */
1787 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1788 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1789 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1790 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1791 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1792 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1794 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1796 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1799 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1800 const struct btrfs_dir_item *item,
1801 struct btrfs_disk_key *key)
1803 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1806 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1807 struct btrfs_dir_item *item,
1808 const struct btrfs_disk_key *key)
1810 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1813 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1815 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1817 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1820 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1821 const struct btrfs_free_space_header *h,
1822 struct btrfs_disk_key *key)
1824 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1827 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1828 struct btrfs_free_space_header *h,
1829 const struct btrfs_disk_key *key)
1831 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1834 /* struct btrfs_disk_key */
1835 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1837 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1838 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1840 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1841 const struct btrfs_disk_key *disk)
1843 cpu->offset = le64_to_cpu(disk->offset);
1844 cpu->type = disk->type;
1845 cpu->objectid = le64_to_cpu(disk->objectid);
1848 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1849 const struct btrfs_key *cpu)
1851 disk->offset = cpu_to_le64(cpu->offset);
1852 disk->type = cpu->type;
1853 disk->objectid = cpu_to_le64(cpu->objectid);
1856 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1857 struct btrfs_key *key, int nr)
1859 struct btrfs_disk_key disk_key;
1860 btrfs_node_key(eb, &disk_key, nr);
1861 btrfs_disk_key_to_cpu(key, &disk_key);
1864 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1865 struct btrfs_key *key, int nr)
1867 struct btrfs_disk_key disk_key;
1868 btrfs_item_key(eb, &disk_key, nr);
1869 btrfs_disk_key_to_cpu(key, &disk_key);
1872 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1873 const struct btrfs_dir_item *item,
1874 struct btrfs_key *key)
1876 struct btrfs_disk_key disk_key;
1877 btrfs_dir_item_key(eb, item, &disk_key);
1878 btrfs_disk_key_to_cpu(key, &disk_key);
1881 /* struct btrfs_header */
1882 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1883 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1885 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1886 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1887 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1888 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1889 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1891 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1892 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1894 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1896 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1898 return (btrfs_header_flags(eb) & flag) == flag;
1901 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1903 u64 flags = btrfs_header_flags(eb);
1904 btrfs_set_header_flags(eb, flags | flag);
1907 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1909 u64 flags = btrfs_header_flags(eb);
1910 btrfs_set_header_flags(eb, flags & ~flag);
1913 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1915 u64 flags = btrfs_header_flags(eb);
1916 return flags >> BTRFS_BACKREF_REV_SHIFT;
1919 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1922 u64 flags = btrfs_header_flags(eb);
1923 flags &= ~BTRFS_BACKREF_REV_MASK;
1924 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1925 btrfs_set_header_flags(eb, flags);
1928 static inline unsigned long btrfs_header_fsid(void)
1930 return offsetof(struct btrfs_header, fsid);
1933 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
1935 return offsetof(struct btrfs_header, chunk_tree_uuid);
1938 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1940 return btrfs_header_level(eb) == 0;
1943 /* struct btrfs_root_item */
1944 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1946 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1947 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1948 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1950 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1952 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1953 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1954 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1955 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1956 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1957 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1958 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1959 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1961 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1963 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1965 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1967 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1969 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1972 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
1974 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
1977 static inline bool btrfs_root_dead(const struct btrfs_root *root)
1979 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
1982 /* struct btrfs_root_backup */
1983 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1985 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1987 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1988 tree_root_level, 8);
1990 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1992 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1993 chunk_root_gen, 64);
1994 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1995 chunk_root_level, 8);
1997 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1999 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2000 extent_root_gen, 64);
2001 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2002 extent_root_level, 8);
2004 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2006 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2008 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2011 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2013 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2015 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2018 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2020 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2022 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2023 csum_root_level, 8);
2024 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2026 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2028 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2031 /* struct btrfs_balance_item */
2032 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2034 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2035 const struct btrfs_balance_item *bi,
2036 struct btrfs_disk_balance_args *ba)
2038 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2041 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2042 struct btrfs_balance_item *bi,
2043 const struct btrfs_disk_balance_args *ba)
2045 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2048 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2049 const struct btrfs_balance_item *bi,
2050 struct btrfs_disk_balance_args *ba)
2052 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2055 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2056 struct btrfs_balance_item *bi,
2057 const struct btrfs_disk_balance_args *ba)
2059 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2062 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2063 const struct btrfs_balance_item *bi,
2064 struct btrfs_disk_balance_args *ba)
2066 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2069 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2070 struct btrfs_balance_item *bi,
2071 const struct btrfs_disk_balance_args *ba)
2073 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2077 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2078 const struct btrfs_disk_balance_args *disk)
2080 memset(cpu, 0, sizeof(*cpu));
2082 cpu->profiles = le64_to_cpu(disk->profiles);
2083 cpu->usage = le64_to_cpu(disk->usage);
2084 cpu->devid = le64_to_cpu(disk->devid);
2085 cpu->pstart = le64_to_cpu(disk->pstart);
2086 cpu->pend = le64_to_cpu(disk->pend);
2087 cpu->vstart = le64_to_cpu(disk->vstart);
2088 cpu->vend = le64_to_cpu(disk->vend);
2089 cpu->target = le64_to_cpu(disk->target);
2090 cpu->flags = le64_to_cpu(disk->flags);
2091 cpu->limit = le64_to_cpu(disk->limit);
2092 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2093 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2097 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2098 const struct btrfs_balance_args *cpu)
2100 memset(disk, 0, sizeof(*disk));
2102 disk->profiles = cpu_to_le64(cpu->profiles);
2103 disk->usage = cpu_to_le64(cpu->usage);
2104 disk->devid = cpu_to_le64(cpu->devid);
2105 disk->pstart = cpu_to_le64(cpu->pstart);
2106 disk->pend = cpu_to_le64(cpu->pend);
2107 disk->vstart = cpu_to_le64(cpu->vstart);
2108 disk->vend = cpu_to_le64(cpu->vend);
2109 disk->target = cpu_to_le64(cpu->target);
2110 disk->flags = cpu_to_le64(cpu->flags);
2111 disk->limit = cpu_to_le64(cpu->limit);
2112 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2113 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2116 /* struct btrfs_super_block */
2117 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2118 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2119 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2121 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2122 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2123 struct btrfs_super_block, sys_chunk_array_size, 32);
2124 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2125 struct btrfs_super_block, chunk_root_generation, 64);
2126 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2128 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2130 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2131 chunk_root_level, 8);
2132 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2134 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2135 log_root_transid, 64);
2136 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2138 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2140 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2142 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2144 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2146 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2148 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2149 root_dir_objectid, 64);
2150 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2152 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2154 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2155 compat_ro_flags, 64);
2156 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2157 incompat_flags, 64);
2158 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2160 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2161 cache_generation, 64);
2162 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2163 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2164 uuid_tree_generation, 64);
2166 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2167 const char *btrfs_super_csum_name(u16 csum_type);
2170 * The leaf data grows from end-to-front in the node.
2171 * this returns the address of the start of the last item,
2172 * which is the stop of the leaf data stack
2174 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2176 u32 nr = btrfs_header_nritems(leaf);
2179 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2180 return btrfs_item_offset_nr(leaf, nr - 1);
2183 /* struct btrfs_file_extent_item */
2184 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2185 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2186 struct btrfs_file_extent_item, disk_bytenr, 64);
2187 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2188 struct btrfs_file_extent_item, offset, 64);
2189 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2190 struct btrfs_file_extent_item, generation, 64);
2191 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2192 struct btrfs_file_extent_item, num_bytes, 64);
2193 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2194 struct btrfs_file_extent_item, disk_num_bytes, 64);
2195 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2196 struct btrfs_file_extent_item, compression, 8);
2198 static inline unsigned long
2199 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2201 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2204 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2206 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2209 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2211 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2213 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2214 disk_num_bytes, 64);
2215 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2217 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2219 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2221 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2223 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2225 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2226 other_encoding, 16);
2229 * this returns the number of bytes used by the item on disk, minus the
2230 * size of any extent headers. If a file is compressed on disk, this is
2231 * the compressed size
2233 static inline u32 btrfs_file_extent_inline_item_len(
2234 const struct extent_buffer *eb,
2235 struct btrfs_item *e)
2237 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2240 /* btrfs_qgroup_status_item */
2241 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2243 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2245 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2247 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2250 /* btrfs_qgroup_info_item */
2251 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2253 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2254 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2256 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2257 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2260 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2261 struct btrfs_qgroup_info_item, generation, 64);
2262 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2264 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2265 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2266 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2268 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2269 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2271 /* btrfs_qgroup_limit_item */
2272 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2274 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2276 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2278 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2280 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2283 /* btrfs_dev_replace_item */
2284 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2285 struct btrfs_dev_replace_item, src_devid, 64);
2286 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2287 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2289 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2291 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2293 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2295 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2296 num_write_errors, 64);
2297 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2298 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2300 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2302 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2305 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2306 struct btrfs_dev_replace_item, src_devid, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2308 struct btrfs_dev_replace_item,
2309 cont_reading_from_srcdev_mode, 64);
2310 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2311 struct btrfs_dev_replace_item, replace_state, 64);
2312 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2313 struct btrfs_dev_replace_item, time_started, 64);
2314 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2315 struct btrfs_dev_replace_item, time_stopped, 64);
2316 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2317 struct btrfs_dev_replace_item, num_write_errors, 64);
2318 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2319 struct btrfs_dev_replace_item,
2320 num_uncorrectable_read_errors, 64);
2321 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2322 struct btrfs_dev_replace_item, cursor_left, 64);
2323 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2324 struct btrfs_dev_replace_item, cursor_right, 64);
2326 /* helper function to cast into the data area of the leaf. */
2327 #define btrfs_item_ptr(leaf, slot, type) \
2328 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2329 btrfs_item_offset_nr(leaf, slot)))
2331 #define btrfs_item_ptr_offset(leaf, slot) \
2332 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2333 btrfs_item_offset_nr(leaf, slot)))
2335 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2337 return crc32c(crc, address, length);
2340 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2342 put_unaligned_le32(~crc, result);
2345 static inline u64 btrfs_name_hash(const char *name, int len)
2347 return crc32c((u32)~1, name, len);
2351 * Figure the key offset of an extended inode ref
2353 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2356 return (u64) crc32c(parent_objectid, name, len);
2359 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2361 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2366 enum btrfs_inline_ref_type {
2367 BTRFS_REF_TYPE_INVALID,
2368 BTRFS_REF_TYPE_BLOCK,
2369 BTRFS_REF_TYPE_DATA,
2373 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2374 struct btrfs_extent_inline_ref *iref,
2375 enum btrfs_inline_ref_type is_data);
2376 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2378 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2381 * Use this if we would be adding new items, as we could split nodes as we cow
2384 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2387 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2391 * Doing a truncate or a modification won't result in new nodes or leaves, just
2392 * what we need for COW.
2394 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2397 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2400 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2401 u64 start, u64 num_bytes);
2402 void btrfs_free_excluded_extents(struct btrfs_block_group_cache *cache);
2403 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2404 unsigned long count);
2405 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2406 struct btrfs_delayed_ref_root *delayed_refs,
2407 struct btrfs_delayed_ref_head *head);
2408 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2409 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2410 struct btrfs_fs_info *fs_info, u64 bytenr,
2411 u64 offset, int metadata, u64 *refs, u64 *flags);
2412 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2413 u64 bytenr, u64 num, int reserved);
2414 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2415 u64 bytenr, u64 num_bytes);
2416 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2417 int btrfs_cross_ref_exist(struct btrfs_root *root,
2418 u64 objectid, u64 offset, u64 bytenr);
2419 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2420 struct btrfs_root *root,
2421 u64 parent, u64 root_objectid,
2422 const struct btrfs_disk_key *key,
2423 int level, u64 hint,
2425 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2426 struct btrfs_root *root,
2427 struct extent_buffer *buf,
2428 u64 parent, int last_ref);
2429 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2430 struct btrfs_root *root, u64 owner,
2431 u64 offset, u64 ram_bytes,
2432 struct btrfs_key *ins);
2433 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2434 u64 root_objectid, u64 owner, u64 offset,
2435 struct btrfs_key *ins);
2436 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2437 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2438 struct btrfs_key *ins, int is_data, int delalloc);
2439 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2440 struct extent_buffer *buf, int full_backref);
2441 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2442 struct extent_buffer *buf, int full_backref);
2443 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2444 u64 bytenr, u64 num_bytes, u64 flags,
2445 int level, int is_data);
2446 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2448 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2449 u64 start, u64 len, int delalloc);
2450 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2451 u64 start, u64 len);
2452 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2453 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2454 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2455 struct btrfs_ref *generic_ref);
2457 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2458 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2459 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2460 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2462 enum btrfs_reserve_flush_enum {
2463 /* If we are in the transaction, we can't flush anything.*/
2464 BTRFS_RESERVE_NO_FLUSH,
2466 * Flushing delalloc may cause deadlock somewhere, in this
2467 * case, use FLUSH LIMIT
2469 BTRFS_RESERVE_FLUSH_LIMIT,
2470 BTRFS_RESERVE_FLUSH_EVICT,
2471 BTRFS_RESERVE_FLUSH_ALL,
2474 enum btrfs_flush_state {
2475 FLUSH_DELAYED_ITEMS_NR = 1,
2476 FLUSH_DELAYED_ITEMS = 2,
2477 FLUSH_DELAYED_REFS_NR = 3,
2478 FLUSH_DELAYED_REFS = 4,
2480 FLUSH_DELALLOC_WAIT = 6,
2482 ALLOC_CHUNK_FORCE = 8,
2483 RUN_DELAYED_IPUTS = 9,
2487 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2488 struct btrfs_block_rsv *rsv,
2489 int nitems, bool use_global_rsv);
2490 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2491 struct btrfs_block_rsv *rsv);
2492 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2495 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2496 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2497 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2498 u64 start, u64 end);
2499 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2500 u64 num_bytes, u64 *actual_bytes);
2501 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2503 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2504 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2505 struct btrfs_fs_info *fs_info);
2506 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2507 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2508 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2511 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2512 int level, int *slot);
2513 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2514 int btrfs_previous_item(struct btrfs_root *root,
2515 struct btrfs_path *path, u64 min_objectid,
2517 int btrfs_previous_extent_item(struct btrfs_root *root,
2518 struct btrfs_path *path, u64 min_objectid);
2519 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2520 struct btrfs_path *path,
2521 const struct btrfs_key *new_key);
2522 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2523 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2524 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2525 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2526 struct btrfs_key *key, int lowest_level,
2528 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2529 struct btrfs_path *path,
2531 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2534 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2535 struct btrfs_root *root, struct extent_buffer *buf,
2536 struct extent_buffer *parent, int parent_slot,
2537 struct extent_buffer **cow_ret);
2538 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2539 struct btrfs_root *root,
2540 struct extent_buffer *buf,
2541 struct extent_buffer **cow_ret, u64 new_root_objectid);
2542 int btrfs_block_can_be_shared(struct btrfs_root *root,
2543 struct extent_buffer *buf);
2544 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2545 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2546 int btrfs_split_item(struct btrfs_trans_handle *trans,
2547 struct btrfs_root *root,
2548 struct btrfs_path *path,
2549 const struct btrfs_key *new_key,
2550 unsigned long split_offset);
2551 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2552 struct btrfs_root *root,
2553 struct btrfs_path *path,
2554 const struct btrfs_key *new_key);
2555 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2556 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2557 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2558 const struct btrfs_key *key, struct btrfs_path *p,
2559 int ins_len, int cow);
2560 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2561 struct btrfs_path *p, u64 time_seq);
2562 int btrfs_search_slot_for_read(struct btrfs_root *root,
2563 const struct btrfs_key *key,
2564 struct btrfs_path *p, int find_higher,
2566 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2567 struct btrfs_root *root, struct extent_buffer *parent,
2568 int start_slot, u64 *last_ret,
2569 struct btrfs_key *progress);
2570 void btrfs_release_path(struct btrfs_path *p);
2571 struct btrfs_path *btrfs_alloc_path(void);
2572 void btrfs_free_path(struct btrfs_path *p);
2573 void btrfs_set_path_blocking(struct btrfs_path *p);
2574 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2576 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2577 struct btrfs_path *path, int slot, int nr);
2578 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2579 struct btrfs_root *root,
2580 struct btrfs_path *path)
2582 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2585 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2586 const struct btrfs_key *cpu_key, u32 *data_size,
2587 u32 total_data, u32 total_size, int nr);
2588 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2589 const struct btrfs_key *key, void *data, u32 data_size);
2590 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2591 struct btrfs_root *root,
2592 struct btrfs_path *path,
2593 const struct btrfs_key *cpu_key, u32 *data_size,
2596 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2597 struct btrfs_root *root,
2598 struct btrfs_path *path,
2599 const struct btrfs_key *key,
2602 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2605 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2606 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2607 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2609 static inline int btrfs_next_old_item(struct btrfs_root *root,
2610 struct btrfs_path *p, u64 time_seq)
2613 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2614 return btrfs_next_old_leaf(root, p, time_seq);
2617 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2619 return btrfs_next_old_item(root, p, 0);
2621 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2622 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2623 struct btrfs_block_rsv *block_rsv,
2624 int update_ref, int for_reloc);
2625 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2626 struct btrfs_root *root,
2627 struct extent_buffer *node,
2628 struct extent_buffer *parent);
2629 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2632 * Do it this way so we only ever do one test_bit in the normal case.
2634 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2635 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2643 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2644 * anything except sleeping. This function is used to check the status of
2647 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2649 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2652 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2654 kfree(fs_info->balance_ctl);
2655 kfree(fs_info->delayed_root);
2656 kfree(fs_info->extent_root);
2657 kfree(fs_info->tree_root);
2658 kfree(fs_info->chunk_root);
2659 kfree(fs_info->dev_root);
2660 kfree(fs_info->csum_root);
2661 kfree(fs_info->quota_root);
2662 kfree(fs_info->uuid_root);
2663 kfree(fs_info->free_space_root);
2664 kfree(fs_info->super_copy);
2665 kfree(fs_info->super_for_commit);
2669 /* tree mod log functions from ctree.c */
2670 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2671 struct seq_list *elem);
2672 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2673 struct seq_list *elem);
2674 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2677 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2678 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2680 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2681 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2683 int btrfs_del_root(struct btrfs_trans_handle *trans,
2684 const struct btrfs_key *key);
2685 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2686 const struct btrfs_key *key,
2687 struct btrfs_root_item *item);
2688 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2689 struct btrfs_root *root,
2690 struct btrfs_key *key,
2691 struct btrfs_root_item *item);
2692 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2693 struct btrfs_path *path, struct btrfs_root_item *root_item,
2694 struct btrfs_key *root_key);
2695 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2696 void btrfs_set_root_node(struct btrfs_root_item *item,
2697 struct extent_buffer *node);
2698 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2699 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2700 struct btrfs_root *root);
2703 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2705 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2707 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2708 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2712 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2713 const char *name, int name_len);
2714 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2715 int name_len, struct btrfs_inode *dir,
2716 struct btrfs_key *location, u8 type, u64 index);
2717 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2718 struct btrfs_root *root,
2719 struct btrfs_path *path, u64 dir,
2720 const char *name, int name_len,
2722 struct btrfs_dir_item *
2723 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2724 struct btrfs_root *root,
2725 struct btrfs_path *path, u64 dir,
2726 u64 objectid, const char *name, int name_len,
2728 struct btrfs_dir_item *
2729 btrfs_search_dir_index_item(struct btrfs_root *root,
2730 struct btrfs_path *path, u64 dirid,
2731 const char *name, int name_len);
2732 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2733 struct btrfs_root *root,
2734 struct btrfs_path *path,
2735 struct btrfs_dir_item *di);
2736 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2737 struct btrfs_root *root,
2738 struct btrfs_path *path, u64 objectid,
2739 const char *name, u16 name_len,
2740 const void *data, u16 data_len);
2741 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root,
2743 struct btrfs_path *path, u64 dir,
2744 const char *name, u16 name_len,
2746 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2747 struct btrfs_path *path,
2752 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2753 struct btrfs_root *root, u64 offset);
2754 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2755 struct btrfs_root *root, u64 offset);
2756 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2759 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2760 struct btrfs_root *root,
2761 const char *name, int name_len,
2762 u64 inode_objectid, u64 ref_objectid, u64 index);
2763 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2764 struct btrfs_root *root,
2765 const char *name, int name_len,
2766 u64 inode_objectid, u64 ref_objectid, u64 *index);
2767 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2768 struct btrfs_root *root,
2769 struct btrfs_path *path, u64 objectid);
2770 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2771 *root, struct btrfs_path *path,
2772 struct btrfs_key *location, int mod);
2774 struct btrfs_inode_extref *
2775 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2776 struct btrfs_root *root,
2777 struct btrfs_path *path,
2778 const char *name, int name_len,
2779 u64 inode_objectid, u64 ref_objectid, int ins_len,
2782 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2783 int slot, const char *name,
2785 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2786 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2787 const char *name, int name_len);
2789 struct btrfs_dio_private;
2790 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2791 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2792 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2794 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
2795 u64 logical_offset);
2796 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2797 struct btrfs_root *root,
2798 u64 objectid, u64 pos,
2799 u64 disk_offset, u64 disk_num_bytes,
2800 u64 num_bytes, u64 offset, u64 ram_bytes,
2801 u8 compression, u8 encryption, u16 other_encoding);
2802 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2803 struct btrfs_root *root,
2804 struct btrfs_path *path, u64 objectid,
2805 u64 bytenr, int mod);
2806 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2807 struct btrfs_root *root,
2808 struct btrfs_ordered_sum *sums);
2809 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2810 u64 file_start, int contig);
2811 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2812 struct list_head *list, int search_commit);
2813 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2814 const struct btrfs_path *path,
2815 struct btrfs_file_extent_item *fi,
2816 const bool new_inline,
2817 struct extent_map *em);
2820 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2821 u64 start, u64 len);
2822 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2823 u64 *orig_start, u64 *orig_block_len,
2826 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2827 struct btrfs_inode *inode);
2828 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2829 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2830 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2831 struct btrfs_root *root,
2832 struct btrfs_inode *dir, struct btrfs_inode *inode,
2833 const char *name, int name_len);
2834 int btrfs_add_link(struct btrfs_trans_handle *trans,
2835 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2836 const char *name, int name_len, int add_backref, u64 index);
2837 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2838 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2840 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2841 struct btrfs_root *root,
2842 struct inode *inode, u64 new_size,
2845 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2846 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2847 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2848 unsigned int extra_bits,
2849 struct extent_state **cached_state);
2850 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2851 struct btrfs_root *new_root,
2852 struct btrfs_root *parent_root,
2854 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2856 void btrfs_clear_delalloc_extent(struct inode *inode,
2857 struct extent_state *state, unsigned *bits);
2858 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2859 struct extent_state *other);
2860 void btrfs_split_delalloc_extent(struct inode *inode,
2861 struct extent_state *orig, u64 split);
2862 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2863 unsigned long bio_flags);
2864 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2865 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2866 int btrfs_readpage(struct file *file, struct page *page);
2867 void btrfs_evict_inode(struct inode *inode);
2868 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2869 struct inode *btrfs_alloc_inode(struct super_block *sb);
2870 void btrfs_destroy_inode(struct inode *inode);
2871 void btrfs_free_inode(struct inode *inode);
2872 int btrfs_drop_inode(struct inode *inode);
2873 int __init btrfs_init_cachep(void);
2874 void __cold btrfs_destroy_cachep(void);
2875 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2876 struct btrfs_root *root, int *new,
2877 struct btrfs_path *path);
2878 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2879 struct btrfs_root *root, int *was_new);
2880 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2881 struct page *page, size_t pg_offset,
2882 u64 start, u64 end, int create);
2883 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2884 struct btrfs_root *root,
2885 struct inode *inode);
2886 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2887 struct btrfs_root *root, struct inode *inode);
2888 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2889 struct btrfs_inode *inode);
2890 int btrfs_orphan_cleanup(struct btrfs_root *root);
2891 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2892 void btrfs_add_delayed_iput(struct inode *inode);
2893 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2894 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2895 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2896 u64 start, u64 num_bytes, u64 min_size,
2897 loff_t actual_len, u64 *alloc_hint);
2898 int btrfs_prealloc_file_range_trans(struct inode *inode,
2899 struct btrfs_trans_handle *trans, int mode,
2900 u64 start, u64 num_bytes, u64 min_size,
2901 loff_t actual_len, u64 *alloc_hint);
2902 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2903 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2904 struct writeback_control *wbc);
2905 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2906 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2907 u64 end, int uptodate);
2908 extern const struct dentry_operations btrfs_dentry_operations;
2911 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2912 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2913 int btrfs_ioctl_get_supported_features(void __user *arg);
2914 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2915 int btrfs_is_empty_uuid(u8 *uuid);
2916 int btrfs_defrag_file(struct inode *inode, struct file *file,
2917 struct btrfs_ioctl_defrag_range_args *range,
2918 u64 newer_than, unsigned long max_pages);
2919 void btrfs_get_block_group_info(struct list_head *groups_list,
2920 struct btrfs_ioctl_space_info *space);
2921 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2922 struct btrfs_ioctl_balance_args *bargs);
2925 int __init btrfs_auto_defrag_init(void);
2926 void __cold btrfs_auto_defrag_exit(void);
2927 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2928 struct btrfs_inode *inode);
2929 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2930 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2931 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2932 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2934 extern const struct file_operations btrfs_file_operations;
2935 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2936 struct btrfs_root *root, struct inode *inode,
2937 struct btrfs_path *path, u64 start, u64 end,
2938 u64 *drop_end, int drop_cache,
2940 u32 extent_item_size,
2942 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2943 struct btrfs_root *root, struct inode *inode, u64 start,
2944 u64 end, int drop_cache);
2945 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2946 const u64 start, const u64 end,
2947 struct btrfs_clone_extent_info *clone_info,
2948 struct btrfs_trans_handle **trans_out);
2949 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2950 struct btrfs_inode *inode, u64 start, u64 end);
2951 int btrfs_release_file(struct inode *inode, struct file *file);
2952 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2953 size_t num_pages, loff_t pos, size_t write_bytes,
2954 struct extent_state **cached);
2955 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2956 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
2957 struct file *file_out, loff_t pos_out,
2958 loff_t len, unsigned int remap_flags);
2961 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2962 struct btrfs_root *root);
2965 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
2966 unsigned long new_flags);
2967 int btrfs_sync_fs(struct super_block *sb, int wait);
2969 static inline __printf(2, 3) __cold
2970 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
2974 #ifdef CONFIG_PRINTK
2977 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
2979 #define btrfs_printk(fs_info, fmt, args...) \
2980 btrfs_no_printk(fs_info, fmt, ##args)
2983 #define btrfs_emerg(fs_info, fmt, args...) \
2984 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
2985 #define btrfs_alert(fs_info, fmt, args...) \
2986 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
2987 #define btrfs_crit(fs_info, fmt, args...) \
2988 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
2989 #define btrfs_err(fs_info, fmt, args...) \
2990 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
2991 #define btrfs_warn(fs_info, fmt, args...) \
2992 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
2993 #define btrfs_notice(fs_info, fmt, args...) \
2994 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
2995 #define btrfs_info(fs_info, fmt, args...) \
2996 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
2999 * Wrappers that use printk_in_rcu
3001 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3002 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3003 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3004 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3005 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3006 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3007 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3008 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3009 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3010 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3011 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3012 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3013 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3014 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3017 * Wrappers that use a ratelimited printk_in_rcu
3019 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3020 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3021 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3022 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3023 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3024 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3025 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3026 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3027 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3028 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3029 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3030 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3031 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3032 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3035 * Wrappers that use a ratelimited printk
3037 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3038 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3039 #define btrfs_alert_rl(fs_info, fmt, args...) \
3040 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3041 #define btrfs_crit_rl(fs_info, fmt, args...) \
3042 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3043 #define btrfs_err_rl(fs_info, fmt, args...) \
3044 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3045 #define btrfs_warn_rl(fs_info, fmt, args...) \
3046 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3047 #define btrfs_notice_rl(fs_info, fmt, args...) \
3048 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3049 #define btrfs_info_rl(fs_info, fmt, args...) \
3050 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3052 #if defined(CONFIG_DYNAMIC_DEBUG)
3053 #define btrfs_debug(fs_info, fmt, args...) \
3054 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3055 fs_info, KERN_DEBUG fmt, ##args)
3056 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3057 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3058 fs_info, KERN_DEBUG fmt, ##args)
3059 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3060 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3061 fs_info, KERN_DEBUG fmt, ##args)
3062 #define btrfs_debug_rl(fs_info, fmt, args...) \
3063 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3064 fs_info, KERN_DEBUG fmt, ##args)
3065 #elif defined(DEBUG)
3066 #define btrfs_debug(fs_info, fmt, args...) \
3067 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3068 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3069 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3070 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3071 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3072 #define btrfs_debug_rl(fs_info, fmt, args...) \
3073 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3075 #define btrfs_debug(fs_info, fmt, args...) \
3076 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3077 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3078 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3079 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3080 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3081 #define btrfs_debug_rl(fs_info, fmt, args...) \
3082 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3085 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3088 btrfs_printk(fs_info, fmt, ##args); \
3089 rcu_read_unlock(); \
3092 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3095 btrfs_no_printk(fs_info, fmt, ##args); \
3096 rcu_read_unlock(); \
3099 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3101 static DEFINE_RATELIMIT_STATE(_rs, \
3102 DEFAULT_RATELIMIT_INTERVAL, \
3103 DEFAULT_RATELIMIT_BURST); \
3104 if (__ratelimit(&_rs)) \
3105 btrfs_printk(fs_info, fmt, ##args); \
3108 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3111 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3112 rcu_read_unlock(); \
3116 static inline void assfail(const char *expr, const char *file, int line)
3118 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3119 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3124 #define ASSERT(expr) \
3125 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3128 * Use that for functions that are conditionally exported for sanity tests but
3131 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3132 #define EXPORT_FOR_TESTS static
3134 #define EXPORT_FOR_TESTS
3138 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3141 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3146 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3147 unsigned int line, int errno, const char *fmt, ...);
3149 const char *btrfs_decode_error(int errno);
3152 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3153 const char *function,
3154 unsigned int line, int errno);
3157 * Call btrfs_abort_transaction as early as possible when an error condition is
3158 * detected, that way the exact line number is reported.
3160 #define btrfs_abort_transaction(trans, errno) \
3162 /* Report first abort since mount */ \
3163 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3164 &((trans)->fs_info->fs_state))) { \
3165 if ((errno) != -EIO) { \
3166 WARN(1, KERN_DEBUG \
3167 "BTRFS: Transaction aborted (error %d)\n", \
3170 btrfs_debug((trans)->fs_info, \
3171 "Transaction aborted (error %d)", \
3175 __btrfs_abort_transaction((trans), __func__, \
3176 __LINE__, (errno)); \
3179 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3181 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3182 (errno), fmt, ##args); \
3187 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3188 unsigned int line, int errno, const char *fmt, ...);
3190 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3191 * will panic(). Otherwise we BUG() here.
3193 #define btrfs_panic(fs_info, errno, fmt, args...) \
3195 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3200 /* compatibility and incompatibility defines */
3202 #define btrfs_set_fs_incompat(__fs_info, opt) \
3203 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3206 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3207 u64 flag, const char* name)
3209 struct btrfs_super_block *disk_super;
3212 disk_super = fs_info->super_copy;
3213 features = btrfs_super_incompat_flags(disk_super);
3214 if (!(features & flag)) {
3215 spin_lock(&fs_info->super_lock);
3216 features = btrfs_super_incompat_flags(disk_super);
3217 if (!(features & flag)) {
3219 btrfs_set_super_incompat_flags(disk_super, features);
3221 "setting incompat feature flag for %s (0x%llx)",
3224 spin_unlock(&fs_info->super_lock);
3228 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3229 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3232 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3233 u64 flag, const char* name)
3235 struct btrfs_super_block *disk_super;
3238 disk_super = fs_info->super_copy;
3239 features = btrfs_super_incompat_flags(disk_super);
3240 if (features & flag) {
3241 spin_lock(&fs_info->super_lock);
3242 features = btrfs_super_incompat_flags(disk_super);
3243 if (features & flag) {
3245 btrfs_set_super_incompat_flags(disk_super, features);
3247 "clearing incompat feature flag for %s (0x%llx)",
3250 spin_unlock(&fs_info->super_lock);
3254 #define btrfs_fs_incompat(fs_info, opt) \
3255 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3257 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3259 struct btrfs_super_block *disk_super;
3260 disk_super = fs_info->super_copy;
3261 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3264 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3265 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3268 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3269 u64 flag, const char *name)
3271 struct btrfs_super_block *disk_super;
3274 disk_super = fs_info->super_copy;
3275 features = btrfs_super_compat_ro_flags(disk_super);
3276 if (!(features & flag)) {
3277 spin_lock(&fs_info->super_lock);
3278 features = btrfs_super_compat_ro_flags(disk_super);
3279 if (!(features & flag)) {
3281 btrfs_set_super_compat_ro_flags(disk_super, features);
3283 "setting compat-ro feature flag for %s (0x%llx)",
3286 spin_unlock(&fs_info->super_lock);
3290 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3291 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3294 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3295 u64 flag, const char *name)
3297 struct btrfs_super_block *disk_super;
3300 disk_super = fs_info->super_copy;
3301 features = btrfs_super_compat_ro_flags(disk_super);
3302 if (features & flag) {
3303 spin_lock(&fs_info->super_lock);
3304 features = btrfs_super_compat_ro_flags(disk_super);
3305 if (features & flag) {
3307 btrfs_set_super_compat_ro_flags(disk_super, features);
3309 "clearing compat-ro feature flag for %s (0x%llx)",
3312 spin_unlock(&fs_info->super_lock);
3316 #define btrfs_fs_compat_ro(fs_info, opt) \
3317 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3319 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3321 struct btrfs_super_block *disk_super;
3322 disk_super = fs_info->super_copy;
3323 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3327 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3328 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3329 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3330 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3331 struct inode *inode, struct inode *dir);
3333 #define btrfs_get_acl NULL
3334 #define btrfs_set_acl NULL
3335 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3336 struct inode *inode, struct inode *dir)
3343 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3344 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3345 struct btrfs_root *root);
3346 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3347 struct btrfs_root *root);
3348 int btrfs_recover_relocation(struct btrfs_root *root);
3349 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3350 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3351 struct btrfs_root *root, struct extent_buffer *buf,
3352 struct extent_buffer *cow);
3353 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3354 u64 *bytes_to_reserve);
3355 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3356 struct btrfs_pending_snapshot *pending);
3359 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3360 u64 end, struct btrfs_scrub_progress *progress,
3361 int readonly, int is_dev_replace);
3362 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3363 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3364 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3365 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3366 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3367 struct btrfs_scrub_progress *progress);
3368 static inline void btrfs_init_full_stripe_locks_tree(
3369 struct btrfs_full_stripe_locks_tree *locks_root)
3371 locks_root->root = RB_ROOT;
3372 mutex_init(&locks_root->lock);
3376 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3377 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3378 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3380 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3382 btrfs_bio_counter_sub(fs_info, 1);
3386 struct reada_control {
3387 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3388 struct btrfs_key key_start;
3389 struct btrfs_key key_end; /* exclusive */
3392 wait_queue_head_t wait;
3394 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3395 struct btrfs_key *start, struct btrfs_key *end);
3396 int btrfs_reada_wait(void *handle);
3397 void btrfs_reada_detach(void *handle);
3398 int btree_readahead_hook(struct extent_buffer *eb, int err);
3400 static inline int is_fstree(u64 rootid)
3402 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3403 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3404 !btrfs_qgroup_level(rootid)))
3409 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3411 return signal_pending(current);
3414 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3416 /* Sanity test specific functions */
3417 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3418 void btrfs_test_inode_set_ops(struct inode *inode);
3419 void btrfs_test_destroy_inode(struct inode *inode);
3421 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3423 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3426 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)