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 struct task_struct *transaction_kthread;
738 struct task_struct *cleaner_kthread;
739 u32 thread_pool_size;
741 struct kobject *space_info_kobj;
745 /* used to keep from writing metadata until there is a nice batch */
746 struct percpu_counter dirty_metadata_bytes;
747 struct percpu_counter delalloc_bytes;
748 struct percpu_counter dio_bytes;
749 s32 dirty_metadata_batch;
752 struct list_head dirty_cowonly_roots;
754 struct btrfs_fs_devices *fs_devices;
757 * The space_info list is effectively read only after initial
758 * setup. It is populated at mount time and cleaned up after
759 * all block groups are removed. RCU is used to protect it.
761 struct list_head space_info;
763 struct btrfs_space_info *data_sinfo;
765 struct reloc_control *reloc_ctl;
767 /* data_alloc_cluster is only used in ssd_spread mode */
768 struct btrfs_free_cluster data_alloc_cluster;
770 /* all metadata allocations go through this cluster */
771 struct btrfs_free_cluster meta_alloc_cluster;
773 /* auto defrag inodes go here */
774 spinlock_t defrag_inodes_lock;
775 struct rb_root defrag_inodes;
776 atomic_t defrag_running;
778 /* Used to protect avail_{data, metadata, system}_alloc_bits */
779 seqlock_t profiles_lock;
781 * these three are in extended format (availability of single
782 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
783 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
785 u64 avail_data_alloc_bits;
786 u64 avail_metadata_alloc_bits;
787 u64 avail_system_alloc_bits;
789 /* restriper state */
790 spinlock_t balance_lock;
791 struct mutex balance_mutex;
792 atomic_t balance_pause_req;
793 atomic_t balance_cancel_req;
794 struct btrfs_balance_control *balance_ctl;
795 wait_queue_head_t balance_wait_q;
797 u32 data_chunk_allocations;
802 /* private scrub information */
803 struct mutex scrub_lock;
804 atomic_t scrubs_running;
805 atomic_t scrub_pause_req;
806 atomic_t scrubs_paused;
807 atomic_t scrub_cancel_req;
808 wait_queue_head_t scrub_pause_wait;
810 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
813 refcount_t scrub_workers_refcnt;
814 struct btrfs_workqueue *scrub_workers;
815 struct btrfs_workqueue *scrub_wr_completion_workers;
816 struct btrfs_workqueue *scrub_parity_workers;
818 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
819 u32 check_integrity_print_mask;
821 /* is qgroup tracking in a consistent state? */
824 /* holds configuration and tracking. Protected by qgroup_lock */
825 struct rb_root qgroup_tree;
826 spinlock_t qgroup_lock;
829 * used to avoid frequently calling ulist_alloc()/ulist_free()
830 * when doing qgroup accounting, it must be protected by qgroup_lock.
832 struct ulist *qgroup_ulist;
834 /* protect user change for quota operations */
835 struct mutex qgroup_ioctl_lock;
837 /* list of dirty qgroups to be written at next commit */
838 struct list_head dirty_qgroups;
840 /* used by qgroup for an efficient tree traversal */
843 /* qgroup rescan items */
844 struct mutex qgroup_rescan_lock; /* protects the progress item */
845 struct btrfs_key qgroup_rescan_progress;
846 struct btrfs_workqueue *qgroup_rescan_workers;
847 struct completion qgroup_rescan_completion;
848 struct btrfs_work qgroup_rescan_work;
849 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
851 /* filesystem state */
852 unsigned long fs_state;
854 struct btrfs_delayed_root *delayed_root;
857 spinlock_t reada_lock;
858 struct radix_tree_root reada_tree;
860 /* readahead works cnt */
861 atomic_t reada_works_cnt;
863 /* Extent buffer radix tree */
864 spinlock_t buffer_lock;
865 struct radix_tree_root buffer_radix;
867 /* next backup root to be overwritten */
868 int backup_root_index;
870 /* device replace state */
871 struct btrfs_dev_replace dev_replace;
873 struct semaphore uuid_tree_rescan_sem;
875 /* Used to reclaim the metadata space in the background. */
876 struct work_struct async_reclaim_work;
878 spinlock_t unused_bgs_lock;
879 struct list_head unused_bgs;
880 struct mutex unused_bg_unpin_mutex;
881 struct mutex delete_unused_bgs_mutex;
883 /* Cached block sizes */
888 /* Block groups and devices containing active swapfiles. */
889 spinlock_t swapfile_pins_lock;
890 struct rb_root swapfile_pins;
892 struct crypto_shash *csum_shash;
895 * Number of send operations in progress.
896 * Updated while holding fs_info::balance_mutex.
898 int send_in_progress;
900 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
901 spinlock_t ref_verify_lock;
902 struct rb_root block_tree;
906 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
908 return sb->s_fs_info;
911 struct btrfs_subvolume_writers {
912 struct percpu_counter counter;
913 wait_queue_head_t wait;
917 * The state of btrfs root
921 * btrfs_record_root_in_trans is a multi-step process, and it can race
922 * with the balancing code. But the race is very small, and only the
923 * first time the root is added to each transaction. So IN_TRANS_SETUP
924 * is used to tell us when more checks are required
926 BTRFS_ROOT_IN_TRANS_SETUP,
928 BTRFS_ROOT_TRACK_DIRTY,
930 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
931 BTRFS_ROOT_DEFRAG_RUNNING,
932 BTRFS_ROOT_FORCE_COW,
933 BTRFS_ROOT_MULTI_LOG_TASKS,
938 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
940 * Set for the subvolume tree owning the reloc tree.
942 BTRFS_ROOT_DEAD_RELOC_TREE,
943 /* Mark dead root stored on device whose cleanup needs to be resumed */
944 BTRFS_ROOT_DEAD_TREE,
948 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
949 * code. For detail check comment in fs/btrfs/qgroup.c.
951 struct btrfs_qgroup_swapped_blocks {
953 /* RM_EMPTY_ROOT() of above blocks[] */
955 struct rb_root blocks[BTRFS_MAX_LEVEL];
959 * in ram representation of the tree. extent_root is used for all allocations
960 * and for the extent tree extent_root root.
963 struct extent_buffer *node;
965 struct extent_buffer *commit_root;
966 struct btrfs_root *log_root;
967 struct btrfs_root *reloc_root;
970 struct btrfs_root_item root_item;
971 struct btrfs_key root_key;
972 struct btrfs_fs_info *fs_info;
973 struct extent_io_tree dirty_log_pages;
975 struct mutex objectid_mutex;
977 spinlock_t accounting_lock;
978 struct btrfs_block_rsv *block_rsv;
980 /* free ino cache stuff */
981 struct btrfs_free_space_ctl *free_ino_ctl;
982 enum btrfs_caching_type ino_cache_state;
983 spinlock_t ino_cache_lock;
984 wait_queue_head_t ino_cache_wait;
985 struct btrfs_free_space_ctl *free_ino_pinned;
986 u64 ino_cache_progress;
987 struct inode *ino_cache_inode;
989 struct mutex log_mutex;
990 wait_queue_head_t log_writer_wait;
991 wait_queue_head_t log_commit_wait[2];
992 struct list_head log_ctxs[2];
993 atomic_t log_writers;
994 atomic_t log_commit[2];
997 /* No matter the commit succeeds or not*/
998 int log_transid_committed;
999 /* Just be updated when the commit succeeds. */
1000 int last_log_commit;
1001 pid_t log_start_pid;
1007 u64 highest_objectid;
1009 u64 defrag_trans_start;
1010 struct btrfs_key defrag_progress;
1011 struct btrfs_key defrag_max;
1013 /* the dirty list is only used by non-reference counted roots */
1014 struct list_head dirty_list;
1016 struct list_head root_list;
1018 spinlock_t log_extents_lock[2];
1019 struct list_head logged_list[2];
1021 int orphan_cleanup_state;
1023 spinlock_t inode_lock;
1024 /* red-black tree that keeps track of in-memory inodes */
1025 struct rb_root inode_tree;
1028 * radix tree that keeps track of delayed nodes of every inode,
1029 * protected by inode_lock
1031 struct radix_tree_root delayed_nodes_tree;
1033 * right now this just gets used so that a root has its own devid
1034 * for stat. It may be used for more later
1038 spinlock_t root_item_lock;
1041 struct mutex delalloc_mutex;
1042 spinlock_t delalloc_lock;
1044 * all of the inodes that have delalloc bytes. It is possible for
1045 * this list to be empty even when there is still dirty data=ordered
1046 * extents waiting to finish IO.
1048 struct list_head delalloc_inodes;
1049 struct list_head delalloc_root;
1050 u64 nr_delalloc_inodes;
1052 struct mutex ordered_extent_mutex;
1054 * this is used by the balancing code to wait for all the pending
1057 spinlock_t ordered_extent_lock;
1060 * all of the data=ordered extents pending writeback
1061 * these can span multiple transactions and basically include
1062 * every dirty data page that isn't from nodatacow
1064 struct list_head ordered_extents;
1065 struct list_head ordered_root;
1066 u64 nr_ordered_extents;
1069 * Not empty if this subvolume root has gone through tree block swap
1072 * Will be used by reloc_control::dirty_subvol_roots.
1074 struct list_head reloc_dirty_list;
1077 * Number of currently running SEND ioctls to prevent
1078 * manipulation with the read-only status via SUBVOL_SETFLAGS
1080 int send_in_progress;
1082 * Number of currently running deduplication operations that have a
1083 * destination inode belonging to this root. Protected by the lock
1086 int dedupe_in_progress;
1087 struct btrfs_subvolume_writers *subv_writers;
1088 atomic_t will_be_snapshotted;
1089 atomic_t snapshot_force_cow;
1091 /* For qgroup metadata reserved space */
1092 spinlock_t qgroup_meta_rsv_lock;
1093 u64 qgroup_meta_rsv_pertrans;
1094 u64 qgroup_meta_rsv_prealloc;
1096 /* Number of active swapfiles */
1097 atomic_t nr_swapfiles;
1099 /* Record pairs of swapped blocks for qgroup */
1100 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1102 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1107 struct btrfs_clone_extent_info {
1117 struct btrfs_file_private {
1121 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1123 return btrfs_sb(inode->i_sb)->sectorsize;
1126 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1129 return info->nodesize - sizeof(struct btrfs_header);
1132 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1134 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1136 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1139 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1141 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1144 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1145 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1146 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1148 return BTRFS_MAX_ITEM_SIZE(info) -
1149 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1152 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1154 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1158 * Flags for mount options.
1160 * Note: don't forget to add new options to btrfs_show_options()
1162 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1163 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1164 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1165 #define BTRFS_MOUNT_SSD (1 << 3)
1166 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1167 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1168 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1169 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1170 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1171 #define BTRFS_MOUNT_NOSSD (1 << 9)
1172 #define BTRFS_MOUNT_DISCARD (1 << 10)
1173 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1174 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1175 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1176 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1177 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1178 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1179 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1180 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1181 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1182 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1183 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1184 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1185 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1186 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1187 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1188 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1189 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1190 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1192 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1193 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1195 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1196 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1197 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1198 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1201 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1203 if (!btrfs_test_opt(fs_info, opt)) \
1204 btrfs_info(fs_info, fmt, ##args); \
1205 btrfs_set_opt(fs_info->mount_opt, opt); \
1208 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1210 if (btrfs_test_opt(fs_info, opt)) \
1211 btrfs_info(fs_info, fmt, ##args); \
1212 btrfs_clear_opt(fs_info->mount_opt, opt); \
1216 * Requests for changes that need to be done during transaction commit.
1218 * Internal mount options that are used for special handling of the real
1219 * mount options (eg. cannot be set during remount and have to be set during
1220 * transaction commit)
1223 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1224 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1225 #define BTRFS_PENDING_COMMIT (2)
1227 #define btrfs_test_pending(info, opt) \
1228 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1229 #define btrfs_set_pending(info, opt) \
1230 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1231 #define btrfs_clear_pending(info, opt) \
1232 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1235 * Helpers for setting pending mount option changes.
1237 * Expects corresponding macros
1238 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1240 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1242 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1243 btrfs_info((info), fmt, ##args); \
1244 btrfs_set_pending((info), SET_##opt); \
1245 btrfs_clear_pending((info), CLEAR_##opt); \
1249 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1251 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1252 btrfs_info((info), fmt, ##args); \
1253 btrfs_set_pending((info), CLEAR_##opt); \
1254 btrfs_clear_pending((info), SET_##opt); \
1261 #define BTRFS_INODE_NODATASUM (1 << 0)
1262 #define BTRFS_INODE_NODATACOW (1 << 1)
1263 #define BTRFS_INODE_READONLY (1 << 2)
1264 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1265 #define BTRFS_INODE_PREALLOC (1 << 4)
1266 #define BTRFS_INODE_SYNC (1 << 5)
1267 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1268 #define BTRFS_INODE_APPEND (1 << 7)
1269 #define BTRFS_INODE_NODUMP (1 << 8)
1270 #define BTRFS_INODE_NOATIME (1 << 9)
1271 #define BTRFS_INODE_DIRSYNC (1 << 10)
1272 #define BTRFS_INODE_COMPRESS (1 << 11)
1274 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1276 #define BTRFS_INODE_FLAG_MASK \
1277 (BTRFS_INODE_NODATASUM | \
1278 BTRFS_INODE_NODATACOW | \
1279 BTRFS_INODE_READONLY | \
1280 BTRFS_INODE_NOCOMPRESS | \
1281 BTRFS_INODE_PREALLOC | \
1282 BTRFS_INODE_SYNC | \
1283 BTRFS_INODE_IMMUTABLE | \
1284 BTRFS_INODE_APPEND | \
1285 BTRFS_INODE_NODUMP | \
1286 BTRFS_INODE_NOATIME | \
1287 BTRFS_INODE_DIRSYNC | \
1288 BTRFS_INODE_COMPRESS | \
1289 BTRFS_INODE_ROOT_ITEM_INIT)
1291 struct btrfs_map_token {
1292 const struct extent_buffer *eb;
1294 unsigned long offset;
1297 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1298 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1300 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1301 struct extent_buffer *eb)
1304 token->kaddr = NULL;
1307 /* some macros to generate set/get functions for the struct fields. This
1308 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1311 #define le8_to_cpu(v) (v)
1312 #define cpu_to_le8(v) (v)
1315 #define read_eb_member(eb, ptr, type, member, result) (\
1316 read_extent_buffer(eb, (char *)(result), \
1317 ((unsigned long)(ptr)) + \
1318 offsetof(type, member), \
1319 sizeof(((type *)0)->member)))
1321 #define write_eb_member(eb, ptr, type, member, result) (\
1322 write_extent_buffer(eb, (char *)(result), \
1323 ((unsigned long)(ptr)) + \
1324 offsetof(type, member), \
1325 sizeof(((type *)0)->member)))
1327 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1328 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1329 const void *ptr, unsigned long off, \
1330 struct btrfs_map_token *token); \
1331 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1332 unsigned long off, u##bits val, \
1333 struct btrfs_map_token *token); \
1334 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1335 const void *ptr, unsigned long off); \
1336 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
1337 unsigned long off, u##bits val);
1339 DECLARE_BTRFS_SETGET_BITS(8)
1340 DECLARE_BTRFS_SETGET_BITS(16)
1341 DECLARE_BTRFS_SETGET_BITS(32)
1342 DECLARE_BTRFS_SETGET_BITS(64)
1344 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1345 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1348 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1349 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1351 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1354 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1355 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1357 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1359 struct btrfs_map_token *token) \
1361 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1362 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1364 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1365 type *s, u##bits val, \
1366 struct btrfs_map_token *token) \
1368 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1369 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1372 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1373 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1375 const type *p = page_address(eb->pages[0]); \
1376 u##bits res = le##bits##_to_cpu(p->member); \
1379 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1382 type *p = page_address(eb->pages[0]); \
1383 p->member = cpu_to_le##bits(val); \
1386 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1387 static inline u##bits btrfs_##name(const type *s) \
1389 return le##bits##_to_cpu(s->member); \
1391 static inline void btrfs_set_##name(type *s, u##bits val) \
1393 s->member = cpu_to_le##bits(val); \
1397 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1398 struct btrfs_dev_item *s)
1400 BUILD_BUG_ON(sizeof(u64) !=
1401 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1402 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1405 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1406 struct btrfs_dev_item *s,
1409 BUILD_BUG_ON(sizeof(u64) !=
1410 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1411 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1412 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1416 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1417 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1418 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1419 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1420 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1422 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1423 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1424 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1425 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1426 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1427 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1429 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1430 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1432 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1434 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1436 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1438 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1440 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1441 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1443 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1445 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1447 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1450 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1452 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1455 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1457 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1460 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1461 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1462 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1463 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1464 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1465 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1466 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1467 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1468 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1469 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1470 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1472 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1474 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1477 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1478 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1479 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1481 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1483 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1485 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1487 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1488 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1490 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1492 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1493 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1495 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1498 unsigned long offset = (unsigned long)c;
1499 offset += offsetof(struct btrfs_chunk, stripe);
1500 offset += nr * sizeof(struct btrfs_stripe);
1501 return (struct btrfs_stripe *)offset;
1504 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1506 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1509 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1510 struct btrfs_chunk *c, int nr)
1512 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1515 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1516 struct btrfs_chunk *c, int nr)
1518 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1521 /* struct btrfs_block_group_item */
1522 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1524 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1526 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1527 struct btrfs_block_group_item, chunk_objectid, 64);
1529 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1530 struct btrfs_block_group_item, chunk_objectid, 64);
1531 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1532 struct btrfs_block_group_item, flags, 64);
1533 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1534 struct btrfs_block_group_item, flags, 64);
1536 /* struct btrfs_free_space_info */
1537 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1539 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1541 /* struct btrfs_inode_ref */
1542 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1543 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1545 /* struct btrfs_inode_extref */
1546 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1547 parent_objectid, 64);
1548 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1550 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1552 /* struct btrfs_inode_item */
1553 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1554 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1555 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1556 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1557 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1558 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1559 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1560 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1561 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1562 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1563 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1564 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1565 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1567 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1569 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1571 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1572 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1574 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1576 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1577 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1578 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1579 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1580 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1581 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1582 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1583 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1584 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1585 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1587 /* struct btrfs_dev_extent */
1588 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1590 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1591 chunk_objectid, 64);
1592 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1594 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1596 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1598 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1599 return (unsigned long)dev + ptr;
1602 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1603 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1605 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1607 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1610 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1612 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1613 struct btrfs_tree_block_info *item,
1614 struct btrfs_disk_key *key)
1616 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1619 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1620 struct btrfs_tree_block_info *item,
1621 struct btrfs_disk_key *key)
1623 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1626 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1628 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1630 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1632 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1635 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1638 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1640 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1643 static inline u32 btrfs_extent_inline_ref_size(int type)
1645 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1646 type == BTRFS_SHARED_BLOCK_REF_KEY)
1647 return sizeof(struct btrfs_extent_inline_ref);
1648 if (type == BTRFS_SHARED_DATA_REF_KEY)
1649 return sizeof(struct btrfs_shared_data_ref) +
1650 sizeof(struct btrfs_extent_inline_ref);
1651 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1652 return sizeof(struct btrfs_extent_data_ref) +
1653 offsetof(struct btrfs_extent_inline_ref, offset);
1657 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1658 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1660 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1661 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1663 /* struct btrfs_node */
1664 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1665 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1666 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1668 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1671 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1674 ptr = offsetof(struct btrfs_node, ptrs) +
1675 sizeof(struct btrfs_key_ptr) * nr;
1676 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1679 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1683 ptr = offsetof(struct btrfs_node, ptrs) +
1684 sizeof(struct btrfs_key_ptr) * nr;
1685 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1688 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1691 ptr = offsetof(struct btrfs_node, ptrs) +
1692 sizeof(struct btrfs_key_ptr) * nr;
1693 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1696 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1700 ptr = offsetof(struct btrfs_node, ptrs) +
1701 sizeof(struct btrfs_key_ptr) * nr;
1702 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1705 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1707 return offsetof(struct btrfs_node, ptrs) +
1708 sizeof(struct btrfs_key_ptr) * nr;
1711 void btrfs_node_key(const struct extent_buffer *eb,
1712 struct btrfs_disk_key *disk_key, int nr);
1714 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1715 struct btrfs_disk_key *disk_key, int nr)
1718 ptr = btrfs_node_key_ptr_offset(nr);
1719 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1720 struct btrfs_key_ptr, key, disk_key);
1723 /* struct btrfs_item */
1724 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1725 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1726 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1727 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1729 static inline unsigned long btrfs_item_nr_offset(int nr)
1731 return offsetof(struct btrfs_leaf, items) +
1732 sizeof(struct btrfs_item) * nr;
1735 static inline struct btrfs_item *btrfs_item_nr(int nr)
1737 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1740 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1741 struct btrfs_item *item)
1743 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1746 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1748 return btrfs_item_end(eb, btrfs_item_nr(nr));
1751 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1753 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1756 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1758 return btrfs_item_size(eb, btrfs_item_nr(nr));
1761 static inline void btrfs_item_key(const struct extent_buffer *eb,
1762 struct btrfs_disk_key *disk_key, int nr)
1764 struct btrfs_item *item = btrfs_item_nr(nr);
1765 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1768 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1769 struct btrfs_disk_key *disk_key, int nr)
1771 struct btrfs_item *item = btrfs_item_nr(nr);
1772 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1775 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1778 * struct btrfs_root_ref
1780 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1781 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1782 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1784 /* struct btrfs_dir_item */
1785 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1786 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1787 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1788 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1789 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1790 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1792 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1794 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1797 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1798 const struct btrfs_dir_item *item,
1799 struct btrfs_disk_key *key)
1801 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1804 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1805 struct btrfs_dir_item *item,
1806 const struct btrfs_disk_key *key)
1808 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1811 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1813 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1815 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1818 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1819 const struct btrfs_free_space_header *h,
1820 struct btrfs_disk_key *key)
1822 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1825 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1826 struct btrfs_free_space_header *h,
1827 const struct btrfs_disk_key *key)
1829 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1832 /* struct btrfs_disk_key */
1833 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1835 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1836 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1838 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1839 const struct btrfs_disk_key *disk)
1841 cpu->offset = le64_to_cpu(disk->offset);
1842 cpu->type = disk->type;
1843 cpu->objectid = le64_to_cpu(disk->objectid);
1846 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1847 const struct btrfs_key *cpu)
1849 disk->offset = cpu_to_le64(cpu->offset);
1850 disk->type = cpu->type;
1851 disk->objectid = cpu_to_le64(cpu->objectid);
1854 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1855 struct btrfs_key *key, int nr)
1857 struct btrfs_disk_key disk_key;
1858 btrfs_node_key(eb, &disk_key, nr);
1859 btrfs_disk_key_to_cpu(key, &disk_key);
1862 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1863 struct btrfs_key *key, int nr)
1865 struct btrfs_disk_key disk_key;
1866 btrfs_item_key(eb, &disk_key, nr);
1867 btrfs_disk_key_to_cpu(key, &disk_key);
1870 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1871 const struct btrfs_dir_item *item,
1872 struct btrfs_key *key)
1874 struct btrfs_disk_key disk_key;
1875 btrfs_dir_item_key(eb, item, &disk_key);
1876 btrfs_disk_key_to_cpu(key, &disk_key);
1879 /* struct btrfs_header */
1880 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1881 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1883 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1884 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1885 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1886 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1887 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1889 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1890 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
1892 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1894 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
1896 return (btrfs_header_flags(eb) & flag) == flag;
1899 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1901 u64 flags = btrfs_header_flags(eb);
1902 btrfs_set_header_flags(eb, flags | flag);
1905 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1907 u64 flags = btrfs_header_flags(eb);
1908 btrfs_set_header_flags(eb, flags & ~flag);
1911 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
1913 u64 flags = btrfs_header_flags(eb);
1914 return flags >> BTRFS_BACKREF_REV_SHIFT;
1917 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1920 u64 flags = btrfs_header_flags(eb);
1921 flags &= ~BTRFS_BACKREF_REV_MASK;
1922 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1923 btrfs_set_header_flags(eb, flags);
1926 static inline unsigned long btrfs_header_fsid(void)
1928 return offsetof(struct btrfs_header, fsid);
1931 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
1933 return offsetof(struct btrfs_header, chunk_tree_uuid);
1936 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
1938 return btrfs_header_level(eb) == 0;
1941 /* struct btrfs_root_item */
1942 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1944 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1945 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1946 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1948 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1950 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1951 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1952 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1953 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1954 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1955 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1956 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1957 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1959 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1961 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1963 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1965 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1967 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1970 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
1972 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
1975 static inline bool btrfs_root_dead(const struct btrfs_root *root)
1977 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
1980 /* struct btrfs_root_backup */
1981 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1983 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1985 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1986 tree_root_level, 8);
1988 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1990 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1991 chunk_root_gen, 64);
1992 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1993 chunk_root_level, 8);
1995 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1997 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1998 extent_root_gen, 64);
1999 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2000 extent_root_level, 8);
2002 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2004 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2006 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2009 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2011 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2013 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2016 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2018 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2020 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2021 csum_root_level, 8);
2022 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2024 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2026 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2029 /* struct btrfs_balance_item */
2030 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2032 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2033 const struct btrfs_balance_item *bi,
2034 struct btrfs_disk_balance_args *ba)
2036 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2039 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2040 struct btrfs_balance_item *bi,
2041 const struct btrfs_disk_balance_args *ba)
2043 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2046 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2047 const struct btrfs_balance_item *bi,
2048 struct btrfs_disk_balance_args *ba)
2050 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2053 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2054 struct btrfs_balance_item *bi,
2055 const struct btrfs_disk_balance_args *ba)
2057 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2060 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2061 const struct btrfs_balance_item *bi,
2062 struct btrfs_disk_balance_args *ba)
2064 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2067 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2068 struct btrfs_balance_item *bi,
2069 const struct btrfs_disk_balance_args *ba)
2071 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2075 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2076 const struct btrfs_disk_balance_args *disk)
2078 memset(cpu, 0, sizeof(*cpu));
2080 cpu->profiles = le64_to_cpu(disk->profiles);
2081 cpu->usage = le64_to_cpu(disk->usage);
2082 cpu->devid = le64_to_cpu(disk->devid);
2083 cpu->pstart = le64_to_cpu(disk->pstart);
2084 cpu->pend = le64_to_cpu(disk->pend);
2085 cpu->vstart = le64_to_cpu(disk->vstart);
2086 cpu->vend = le64_to_cpu(disk->vend);
2087 cpu->target = le64_to_cpu(disk->target);
2088 cpu->flags = le64_to_cpu(disk->flags);
2089 cpu->limit = le64_to_cpu(disk->limit);
2090 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2091 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2095 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2096 const struct btrfs_balance_args *cpu)
2098 memset(disk, 0, sizeof(*disk));
2100 disk->profiles = cpu_to_le64(cpu->profiles);
2101 disk->usage = cpu_to_le64(cpu->usage);
2102 disk->devid = cpu_to_le64(cpu->devid);
2103 disk->pstart = cpu_to_le64(cpu->pstart);
2104 disk->pend = cpu_to_le64(cpu->pend);
2105 disk->vstart = cpu_to_le64(cpu->vstart);
2106 disk->vend = cpu_to_le64(cpu->vend);
2107 disk->target = cpu_to_le64(cpu->target);
2108 disk->flags = cpu_to_le64(cpu->flags);
2109 disk->limit = cpu_to_le64(cpu->limit);
2110 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2111 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2114 /* struct btrfs_super_block */
2115 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2116 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2117 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2119 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2120 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2121 struct btrfs_super_block, sys_chunk_array_size, 32);
2122 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2123 struct btrfs_super_block, chunk_root_generation, 64);
2124 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2126 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2128 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2129 chunk_root_level, 8);
2130 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2132 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2133 log_root_transid, 64);
2134 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2136 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2138 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2140 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2142 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2144 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2146 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2147 root_dir_objectid, 64);
2148 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2150 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2152 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2153 compat_ro_flags, 64);
2154 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2155 incompat_flags, 64);
2156 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2158 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2159 cache_generation, 64);
2160 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2161 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2162 uuid_tree_generation, 64);
2164 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2165 const char *btrfs_super_csum_name(u16 csum_type);
2168 * The leaf data grows from end-to-front in the node.
2169 * this returns the address of the start of the last item,
2170 * which is the stop of the leaf data stack
2172 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2174 u32 nr = btrfs_header_nritems(leaf);
2177 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2178 return btrfs_item_offset_nr(leaf, nr - 1);
2181 /* struct btrfs_file_extent_item */
2182 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2183 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2184 struct btrfs_file_extent_item, disk_bytenr, 64);
2185 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2186 struct btrfs_file_extent_item, offset, 64);
2187 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2188 struct btrfs_file_extent_item, generation, 64);
2189 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2190 struct btrfs_file_extent_item, num_bytes, 64);
2191 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2192 struct btrfs_file_extent_item, disk_num_bytes, 64);
2193 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2194 struct btrfs_file_extent_item, compression, 8);
2196 static inline unsigned long
2197 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2199 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2202 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2204 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2207 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2209 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2211 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2212 disk_num_bytes, 64);
2213 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2215 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2217 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2219 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2221 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2223 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2224 other_encoding, 16);
2227 * this returns the number of bytes used by the item on disk, minus the
2228 * size of any extent headers. If a file is compressed on disk, this is
2229 * the compressed size
2231 static inline u32 btrfs_file_extent_inline_item_len(
2232 const struct extent_buffer *eb,
2233 struct btrfs_item *e)
2235 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2238 /* btrfs_qgroup_status_item */
2239 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2241 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2243 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2245 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2248 /* btrfs_qgroup_info_item */
2249 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2251 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2252 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2254 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2255 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2258 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2259 struct btrfs_qgroup_info_item, generation, 64);
2260 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2262 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2263 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2264 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2266 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2267 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2269 /* btrfs_qgroup_limit_item */
2270 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2272 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2274 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2276 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2278 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2281 /* btrfs_dev_replace_item */
2282 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2283 struct btrfs_dev_replace_item, src_devid, 64);
2284 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2285 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2287 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2289 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2291 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2293 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2294 num_write_errors, 64);
2295 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2296 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2298 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2300 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2303 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2304 struct btrfs_dev_replace_item, src_devid, 64);
2305 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2306 struct btrfs_dev_replace_item,
2307 cont_reading_from_srcdev_mode, 64);
2308 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2309 struct btrfs_dev_replace_item, replace_state, 64);
2310 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2311 struct btrfs_dev_replace_item, time_started, 64);
2312 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2313 struct btrfs_dev_replace_item, time_stopped, 64);
2314 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2315 struct btrfs_dev_replace_item, num_write_errors, 64);
2316 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2317 struct btrfs_dev_replace_item,
2318 num_uncorrectable_read_errors, 64);
2319 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2320 struct btrfs_dev_replace_item, cursor_left, 64);
2321 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2322 struct btrfs_dev_replace_item, cursor_right, 64);
2324 /* helper function to cast into the data area of the leaf. */
2325 #define btrfs_item_ptr(leaf, slot, type) \
2326 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2327 btrfs_item_offset_nr(leaf, slot)))
2329 #define btrfs_item_ptr_offset(leaf, slot) \
2330 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2331 btrfs_item_offset_nr(leaf, slot)))
2333 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2335 return crc32c(crc, address, length);
2338 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2340 put_unaligned_le32(~crc, result);
2343 static inline u64 btrfs_name_hash(const char *name, int len)
2345 return crc32c((u32)~1, name, len);
2349 * Figure the key offset of an extended inode ref
2351 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2354 return (u64) crc32c(parent_objectid, name, len);
2357 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2359 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2364 enum btrfs_inline_ref_type {
2365 BTRFS_REF_TYPE_INVALID,
2366 BTRFS_REF_TYPE_BLOCK,
2367 BTRFS_REF_TYPE_DATA,
2371 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2372 struct btrfs_extent_inline_ref *iref,
2373 enum btrfs_inline_ref_type is_data);
2374 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2376 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2379 * Use this if we would be adding new items, as we could split nodes as we cow
2382 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2385 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2389 * Doing a truncate or a modification won't result in new nodes or leaves, just
2390 * what we need for COW.
2392 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2395 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2398 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2399 u64 start, u64 num_bytes);
2400 void btrfs_free_excluded_extents(struct btrfs_block_group_cache *cache);
2401 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2402 unsigned long count);
2403 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2404 struct btrfs_delayed_ref_root *delayed_refs,
2405 struct btrfs_delayed_ref_head *head);
2406 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2407 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2408 struct btrfs_fs_info *fs_info, u64 bytenr,
2409 u64 offset, int metadata, u64 *refs, u64 *flags);
2410 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2411 u64 bytenr, u64 num, int reserved);
2412 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2413 u64 bytenr, u64 num_bytes);
2414 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2415 int btrfs_cross_ref_exist(struct btrfs_root *root,
2416 u64 objectid, u64 offset, u64 bytenr);
2417 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2418 struct btrfs_root *root,
2419 u64 parent, u64 root_objectid,
2420 const struct btrfs_disk_key *key,
2421 int level, u64 hint,
2423 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2424 struct btrfs_root *root,
2425 struct extent_buffer *buf,
2426 u64 parent, int last_ref);
2427 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2428 struct btrfs_root *root, u64 owner,
2429 u64 offset, u64 ram_bytes,
2430 struct btrfs_key *ins);
2431 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2432 u64 root_objectid, u64 owner, u64 offset,
2433 struct btrfs_key *ins);
2434 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2435 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2436 struct btrfs_key *ins, int is_data, int delalloc);
2437 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2438 struct extent_buffer *buf, int full_backref);
2439 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2440 struct extent_buffer *buf, int full_backref);
2441 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2442 u64 bytenr, u64 num_bytes, u64 flags,
2443 int level, int is_data);
2444 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2446 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2447 u64 start, u64 len, int delalloc);
2448 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2449 u64 start, u64 len);
2450 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2451 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2452 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2453 struct btrfs_ref *generic_ref);
2455 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2456 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2457 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2458 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2460 enum btrfs_reserve_flush_enum {
2461 /* If we are in the transaction, we can't flush anything.*/
2462 BTRFS_RESERVE_NO_FLUSH,
2464 * Flushing delalloc may cause deadlock somewhere, in this
2465 * case, use FLUSH LIMIT
2467 BTRFS_RESERVE_FLUSH_LIMIT,
2468 BTRFS_RESERVE_FLUSH_EVICT,
2469 BTRFS_RESERVE_FLUSH_ALL,
2472 enum btrfs_flush_state {
2473 FLUSH_DELAYED_ITEMS_NR = 1,
2474 FLUSH_DELAYED_ITEMS = 2,
2475 FLUSH_DELAYED_REFS_NR = 3,
2476 FLUSH_DELAYED_REFS = 4,
2478 FLUSH_DELALLOC_WAIT = 6,
2480 ALLOC_CHUNK_FORCE = 8,
2481 RUN_DELAYED_IPUTS = 9,
2485 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2486 struct btrfs_block_rsv *rsv,
2487 int nitems, bool use_global_rsv);
2488 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2489 struct btrfs_block_rsv *rsv);
2490 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2492 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2493 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2494 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2495 u64 start, u64 end);
2496 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2497 u64 num_bytes, u64 *actual_bytes);
2498 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2500 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2501 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2502 struct btrfs_fs_info *fs_info);
2503 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2504 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2505 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2508 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2509 int level, int *slot);
2510 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2511 int btrfs_previous_item(struct btrfs_root *root,
2512 struct btrfs_path *path, u64 min_objectid,
2514 int btrfs_previous_extent_item(struct btrfs_root *root,
2515 struct btrfs_path *path, u64 min_objectid);
2516 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2517 struct btrfs_path *path,
2518 const struct btrfs_key *new_key);
2519 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2520 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2521 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2522 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2523 struct btrfs_key *key, int lowest_level,
2525 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2526 struct btrfs_path *path,
2528 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2531 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2532 struct btrfs_root *root, struct extent_buffer *buf,
2533 struct extent_buffer *parent, int parent_slot,
2534 struct extent_buffer **cow_ret);
2535 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2536 struct btrfs_root *root,
2537 struct extent_buffer *buf,
2538 struct extent_buffer **cow_ret, u64 new_root_objectid);
2539 int btrfs_block_can_be_shared(struct btrfs_root *root,
2540 struct extent_buffer *buf);
2541 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2542 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2543 int btrfs_split_item(struct btrfs_trans_handle *trans,
2544 struct btrfs_root *root,
2545 struct btrfs_path *path,
2546 const struct btrfs_key *new_key,
2547 unsigned long split_offset);
2548 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2549 struct btrfs_root *root,
2550 struct btrfs_path *path,
2551 const struct btrfs_key *new_key);
2552 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2553 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2554 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2555 const struct btrfs_key *key, struct btrfs_path *p,
2556 int ins_len, int cow);
2557 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2558 struct btrfs_path *p, u64 time_seq);
2559 int btrfs_search_slot_for_read(struct btrfs_root *root,
2560 const struct btrfs_key *key,
2561 struct btrfs_path *p, int find_higher,
2563 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2564 struct btrfs_root *root, struct extent_buffer *parent,
2565 int start_slot, u64 *last_ret,
2566 struct btrfs_key *progress);
2567 void btrfs_release_path(struct btrfs_path *p);
2568 struct btrfs_path *btrfs_alloc_path(void);
2569 void btrfs_free_path(struct btrfs_path *p);
2570 void btrfs_set_path_blocking(struct btrfs_path *p);
2571 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2573 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2574 struct btrfs_path *path, int slot, int nr);
2575 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2576 struct btrfs_root *root,
2577 struct btrfs_path *path)
2579 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2582 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2583 const struct btrfs_key *cpu_key, u32 *data_size,
2584 u32 total_data, u32 total_size, int nr);
2585 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2586 const struct btrfs_key *key, void *data, u32 data_size);
2587 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2588 struct btrfs_root *root,
2589 struct btrfs_path *path,
2590 const struct btrfs_key *cpu_key, u32 *data_size,
2593 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2594 struct btrfs_root *root,
2595 struct btrfs_path *path,
2596 const struct btrfs_key *key,
2599 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2602 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2603 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2604 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2606 static inline int btrfs_next_old_item(struct btrfs_root *root,
2607 struct btrfs_path *p, u64 time_seq)
2610 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2611 return btrfs_next_old_leaf(root, p, time_seq);
2614 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2616 return btrfs_next_old_item(root, p, 0);
2618 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2619 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2620 struct btrfs_block_rsv *block_rsv,
2621 int update_ref, int for_reloc);
2622 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2623 struct btrfs_root *root,
2624 struct extent_buffer *node,
2625 struct extent_buffer *parent);
2626 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2629 * Do it this way so we only ever do one test_bit in the normal case.
2631 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2632 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2640 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2641 * anything except sleeping. This function is used to check the status of
2644 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2646 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2649 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2651 kfree(fs_info->balance_ctl);
2652 kfree(fs_info->delayed_root);
2653 kfree(fs_info->extent_root);
2654 kfree(fs_info->tree_root);
2655 kfree(fs_info->chunk_root);
2656 kfree(fs_info->dev_root);
2657 kfree(fs_info->csum_root);
2658 kfree(fs_info->quota_root);
2659 kfree(fs_info->uuid_root);
2660 kfree(fs_info->free_space_root);
2661 kfree(fs_info->super_copy);
2662 kfree(fs_info->super_for_commit);
2666 /* tree mod log functions from ctree.c */
2667 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2668 struct seq_list *elem);
2669 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2670 struct seq_list *elem);
2671 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2674 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2675 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2677 int btrfs_del_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(struct btrfs_trans_handle *trans,
2681 const struct btrfs_key *key);
2682 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2683 const struct btrfs_key *key,
2684 struct btrfs_root_item *item);
2685 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2686 struct btrfs_root *root,
2687 struct btrfs_key *key,
2688 struct btrfs_root_item *item);
2689 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2690 struct btrfs_path *path, struct btrfs_root_item *root_item,
2691 struct btrfs_key *root_key);
2692 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2693 void btrfs_set_root_node(struct btrfs_root_item *item,
2694 struct extent_buffer *node);
2695 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2696 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2697 struct btrfs_root *root);
2700 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2702 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2704 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
2705 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
2709 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2710 const char *name, int name_len);
2711 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2712 int name_len, struct btrfs_inode *dir,
2713 struct btrfs_key *location, u8 type, u64 index);
2714 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2715 struct btrfs_root *root,
2716 struct btrfs_path *path, u64 dir,
2717 const char *name, int name_len,
2719 struct btrfs_dir_item *
2720 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2721 struct btrfs_root *root,
2722 struct btrfs_path *path, u64 dir,
2723 u64 objectid, const char *name, int name_len,
2725 struct btrfs_dir_item *
2726 btrfs_search_dir_index_item(struct btrfs_root *root,
2727 struct btrfs_path *path, u64 dirid,
2728 const char *name, int name_len);
2729 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2730 struct btrfs_root *root,
2731 struct btrfs_path *path,
2732 struct btrfs_dir_item *di);
2733 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2734 struct btrfs_root *root,
2735 struct btrfs_path *path, u64 objectid,
2736 const char *name, u16 name_len,
2737 const void *data, u16 data_len);
2738 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2739 struct btrfs_root *root,
2740 struct btrfs_path *path, u64 dir,
2741 const char *name, u16 name_len,
2743 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2744 struct btrfs_path *path,
2749 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2750 struct btrfs_root *root, u64 offset);
2751 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2752 struct btrfs_root *root, u64 offset);
2753 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2756 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root,
2758 const char *name, int name_len,
2759 u64 inode_objectid, u64 ref_objectid, u64 index);
2760 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2761 struct btrfs_root *root,
2762 const char *name, int name_len,
2763 u64 inode_objectid, u64 ref_objectid, u64 *index);
2764 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2765 struct btrfs_root *root,
2766 struct btrfs_path *path, u64 objectid);
2767 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2768 *root, struct btrfs_path *path,
2769 struct btrfs_key *location, int mod);
2771 struct btrfs_inode_extref *
2772 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2773 struct btrfs_root *root,
2774 struct btrfs_path *path,
2775 const char *name, int name_len,
2776 u64 inode_objectid, u64 ref_objectid, int ins_len,
2779 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2780 int slot, const char *name,
2782 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2783 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2784 const char *name, int name_len);
2786 struct btrfs_dio_private;
2787 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2788 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2789 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2791 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
2792 u64 logical_offset);
2793 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2794 struct btrfs_root *root,
2795 u64 objectid, u64 pos,
2796 u64 disk_offset, u64 disk_num_bytes,
2797 u64 num_bytes, u64 offset, u64 ram_bytes,
2798 u8 compression, u8 encryption, u16 other_encoding);
2799 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2800 struct btrfs_root *root,
2801 struct btrfs_path *path, u64 objectid,
2802 u64 bytenr, int mod);
2803 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2804 struct btrfs_root *root,
2805 struct btrfs_ordered_sum *sums);
2806 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
2807 u64 file_start, int contig);
2808 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2809 struct list_head *list, int search_commit);
2810 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2811 const struct btrfs_path *path,
2812 struct btrfs_file_extent_item *fi,
2813 const bool new_inline,
2814 struct extent_map *em);
2817 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2818 u64 start, u64 len);
2819 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2820 u64 *orig_start, u64 *orig_block_len,
2823 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
2824 struct btrfs_inode *inode);
2825 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
2826 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
2827 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
2828 struct btrfs_root *root,
2829 struct btrfs_inode *dir, struct btrfs_inode *inode,
2830 const char *name, int name_len);
2831 int btrfs_add_link(struct btrfs_trans_handle *trans,
2832 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
2833 const char *name, int name_len, int add_backref, u64 index);
2834 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
2835 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
2837 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
2838 struct btrfs_root *root,
2839 struct inode *inode, u64 new_size,
2842 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
2843 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
2844 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
2845 unsigned int extra_bits,
2846 struct extent_state **cached_state);
2847 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2848 struct btrfs_root *new_root,
2849 struct btrfs_root *parent_root,
2851 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
2853 void btrfs_clear_delalloc_extent(struct inode *inode,
2854 struct extent_state *state, unsigned *bits);
2855 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
2856 struct extent_state *other);
2857 void btrfs_split_delalloc_extent(struct inode *inode,
2858 struct extent_state *orig, u64 split);
2859 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
2860 unsigned long bio_flags);
2861 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
2862 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
2863 int btrfs_readpage(struct file *file, struct page *page);
2864 void btrfs_evict_inode(struct inode *inode);
2865 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2866 struct inode *btrfs_alloc_inode(struct super_block *sb);
2867 void btrfs_destroy_inode(struct inode *inode);
2868 void btrfs_free_inode(struct inode *inode);
2869 int btrfs_drop_inode(struct inode *inode);
2870 int __init btrfs_init_cachep(void);
2871 void __cold btrfs_destroy_cachep(void);
2872 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
2873 struct btrfs_root *root, int *new,
2874 struct btrfs_path *path);
2875 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2876 struct btrfs_root *root, int *was_new);
2877 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
2878 struct page *page, size_t pg_offset,
2879 u64 start, u64 end, int create);
2880 int btrfs_update_inode(struct btrfs_trans_handle *trans,
2881 struct btrfs_root *root,
2882 struct inode *inode);
2883 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
2884 struct btrfs_root *root, struct inode *inode);
2885 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
2886 struct btrfs_inode *inode);
2887 int btrfs_orphan_cleanup(struct btrfs_root *root);
2888 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2889 void btrfs_add_delayed_iput(struct inode *inode);
2890 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
2891 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
2892 int btrfs_prealloc_file_range(struct inode *inode, int mode,
2893 u64 start, u64 num_bytes, u64 min_size,
2894 loff_t actual_len, u64 *alloc_hint);
2895 int btrfs_prealloc_file_range_trans(struct inode *inode,
2896 struct btrfs_trans_handle *trans, int mode,
2897 u64 start, u64 num_bytes, u64 min_size,
2898 loff_t actual_len, u64 *alloc_hint);
2899 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
2900 u64 start, u64 end, int *page_started, unsigned long *nr_written,
2901 struct writeback_control *wbc);
2902 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
2903 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
2904 u64 end, int uptodate);
2905 extern const struct dentry_operations btrfs_dentry_operations;
2908 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2909 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2910 int btrfs_ioctl_get_supported_features(void __user *arg);
2911 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
2912 int btrfs_is_empty_uuid(u8 *uuid);
2913 int btrfs_defrag_file(struct inode *inode, struct file *file,
2914 struct btrfs_ioctl_defrag_range_args *range,
2915 u64 newer_than, unsigned long max_pages);
2916 void btrfs_get_block_group_info(struct list_head *groups_list,
2917 struct btrfs_ioctl_space_info *space);
2918 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
2919 struct btrfs_ioctl_balance_args *bargs);
2922 int __init btrfs_auto_defrag_init(void);
2923 void __cold btrfs_auto_defrag_exit(void);
2924 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
2925 struct btrfs_inode *inode);
2926 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2927 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
2928 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2929 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
2931 extern const struct file_operations btrfs_file_operations;
2932 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
2933 struct btrfs_root *root, struct inode *inode,
2934 struct btrfs_path *path, u64 start, u64 end,
2935 u64 *drop_end, int drop_cache,
2937 u32 extent_item_size,
2939 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
2940 struct btrfs_root *root, struct inode *inode, u64 start,
2941 u64 end, int drop_cache);
2942 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path,
2943 const u64 start, const u64 end,
2944 struct btrfs_clone_extent_info *clone_info,
2945 struct btrfs_trans_handle **trans_out);
2946 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
2947 struct btrfs_inode *inode, u64 start, u64 end);
2948 int btrfs_release_file(struct inode *inode, struct file *file);
2949 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
2950 size_t num_pages, loff_t pos, size_t write_bytes,
2951 struct extent_state **cached);
2952 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
2953 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
2954 struct file *file_out, loff_t pos_out,
2955 loff_t len, unsigned int remap_flags);
2958 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2959 struct btrfs_root *root);
2962 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
2963 unsigned long new_flags);
2964 int btrfs_sync_fs(struct super_block *sb, int wait);
2966 static inline __printf(2, 3) __cold
2967 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
2971 #ifdef CONFIG_PRINTK
2974 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
2976 #define btrfs_printk(fs_info, fmt, args...) \
2977 btrfs_no_printk(fs_info, fmt, ##args)
2980 #define btrfs_emerg(fs_info, fmt, args...) \
2981 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
2982 #define btrfs_alert(fs_info, fmt, args...) \
2983 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
2984 #define btrfs_crit(fs_info, fmt, args...) \
2985 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
2986 #define btrfs_err(fs_info, fmt, args...) \
2987 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
2988 #define btrfs_warn(fs_info, fmt, args...) \
2989 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
2990 #define btrfs_notice(fs_info, fmt, args...) \
2991 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
2992 #define btrfs_info(fs_info, fmt, args...) \
2993 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
2996 * Wrappers that use printk_in_rcu
2998 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
2999 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3000 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3001 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3002 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3003 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3004 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3005 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3006 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3007 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3008 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3009 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3010 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3011 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3014 * Wrappers that use a ratelimited printk_in_rcu
3016 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3017 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3018 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3019 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3020 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3021 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3022 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3023 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3024 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3025 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3026 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3027 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3028 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3029 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3032 * Wrappers that use a ratelimited printk
3034 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3035 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3036 #define btrfs_alert_rl(fs_info, fmt, args...) \
3037 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3038 #define btrfs_crit_rl(fs_info, fmt, args...) \
3039 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3040 #define btrfs_err_rl(fs_info, fmt, args...) \
3041 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3042 #define btrfs_warn_rl(fs_info, fmt, args...) \
3043 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3044 #define btrfs_notice_rl(fs_info, fmt, args...) \
3045 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3046 #define btrfs_info_rl(fs_info, fmt, args...) \
3047 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3049 #if defined(CONFIG_DYNAMIC_DEBUG)
3050 #define btrfs_debug(fs_info, fmt, args...) \
3051 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3052 fs_info, KERN_DEBUG fmt, ##args)
3053 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3054 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3055 fs_info, KERN_DEBUG fmt, ##args)
3056 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3057 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3058 fs_info, KERN_DEBUG fmt, ##args)
3059 #define btrfs_debug_rl(fs_info, fmt, args...) \
3060 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3061 fs_info, KERN_DEBUG fmt, ##args)
3062 #elif defined(DEBUG)
3063 #define btrfs_debug(fs_info, fmt, args...) \
3064 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3065 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3066 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3067 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3068 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3069 #define btrfs_debug_rl(fs_info, fmt, args...) \
3070 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3072 #define btrfs_debug(fs_info, fmt, args...) \
3073 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3074 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3075 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3076 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3077 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3078 #define btrfs_debug_rl(fs_info, fmt, args...) \
3079 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3082 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3085 btrfs_printk(fs_info, fmt, ##args); \
3086 rcu_read_unlock(); \
3089 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3092 btrfs_no_printk(fs_info, fmt, ##args); \
3093 rcu_read_unlock(); \
3096 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3098 static DEFINE_RATELIMIT_STATE(_rs, \
3099 DEFAULT_RATELIMIT_INTERVAL, \
3100 DEFAULT_RATELIMIT_BURST); \
3101 if (__ratelimit(&_rs)) \
3102 btrfs_printk(fs_info, fmt, ##args); \
3105 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3108 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3109 rcu_read_unlock(); \
3113 static inline void assfail(const char *expr, const char *file, int line)
3115 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3116 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3121 #define ASSERT(expr) \
3122 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3125 * Use that for functions that are conditionally exported for sanity tests but
3128 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3129 #define EXPORT_FOR_TESTS static
3131 #define EXPORT_FOR_TESTS
3135 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3138 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3143 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3144 unsigned int line, int errno, const char *fmt, ...);
3146 const char *btrfs_decode_error(int errno);
3149 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3150 const char *function,
3151 unsigned int line, int errno);
3154 * Call btrfs_abort_transaction as early as possible when an error condition is
3155 * detected, that way the exact line number is reported.
3157 #define btrfs_abort_transaction(trans, errno) \
3159 /* Report first abort since mount */ \
3160 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3161 &((trans)->fs_info->fs_state))) { \
3162 if ((errno) != -EIO) { \
3163 WARN(1, KERN_DEBUG \
3164 "BTRFS: Transaction aborted (error %d)\n", \
3167 btrfs_debug((trans)->fs_info, \
3168 "Transaction aborted (error %d)", \
3172 __btrfs_abort_transaction((trans), __func__, \
3173 __LINE__, (errno)); \
3176 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3178 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3179 (errno), fmt, ##args); \
3184 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3185 unsigned int line, int errno, const char *fmt, ...);
3187 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3188 * will panic(). Otherwise we BUG() here.
3190 #define btrfs_panic(fs_info, errno, fmt, args...) \
3192 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3197 /* compatibility and incompatibility defines */
3199 #define btrfs_set_fs_incompat(__fs_info, opt) \
3200 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3203 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3204 u64 flag, const char* name)
3206 struct btrfs_super_block *disk_super;
3209 disk_super = fs_info->super_copy;
3210 features = btrfs_super_incompat_flags(disk_super);
3211 if (!(features & flag)) {
3212 spin_lock(&fs_info->super_lock);
3213 features = btrfs_super_incompat_flags(disk_super);
3214 if (!(features & flag)) {
3216 btrfs_set_super_incompat_flags(disk_super, features);
3218 "setting incompat feature flag for %s (0x%llx)",
3221 spin_unlock(&fs_info->super_lock);
3225 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3226 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3229 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3230 u64 flag, const char* name)
3232 struct btrfs_super_block *disk_super;
3235 disk_super = fs_info->super_copy;
3236 features = btrfs_super_incompat_flags(disk_super);
3237 if (features & flag) {
3238 spin_lock(&fs_info->super_lock);
3239 features = btrfs_super_incompat_flags(disk_super);
3240 if (features & flag) {
3242 btrfs_set_super_incompat_flags(disk_super, features);
3244 "clearing incompat feature flag for %s (0x%llx)",
3247 spin_unlock(&fs_info->super_lock);
3251 #define btrfs_fs_incompat(fs_info, opt) \
3252 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3254 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3256 struct btrfs_super_block *disk_super;
3257 disk_super = fs_info->super_copy;
3258 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3261 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3262 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3265 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3266 u64 flag, const char *name)
3268 struct btrfs_super_block *disk_super;
3271 disk_super = fs_info->super_copy;
3272 features = btrfs_super_compat_ro_flags(disk_super);
3273 if (!(features & flag)) {
3274 spin_lock(&fs_info->super_lock);
3275 features = btrfs_super_compat_ro_flags(disk_super);
3276 if (!(features & flag)) {
3278 btrfs_set_super_compat_ro_flags(disk_super, features);
3280 "setting compat-ro feature flag for %s (0x%llx)",
3283 spin_unlock(&fs_info->super_lock);
3287 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3288 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3291 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3292 u64 flag, const char *name)
3294 struct btrfs_super_block *disk_super;
3297 disk_super = fs_info->super_copy;
3298 features = btrfs_super_compat_ro_flags(disk_super);
3299 if (features & flag) {
3300 spin_lock(&fs_info->super_lock);
3301 features = btrfs_super_compat_ro_flags(disk_super);
3302 if (features & flag) {
3304 btrfs_set_super_compat_ro_flags(disk_super, features);
3306 "clearing compat-ro feature flag for %s (0x%llx)",
3309 spin_unlock(&fs_info->super_lock);
3313 #define btrfs_fs_compat_ro(fs_info, opt) \
3314 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3316 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3318 struct btrfs_super_block *disk_super;
3319 disk_super = fs_info->super_copy;
3320 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3324 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3325 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3326 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3327 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3328 struct inode *inode, struct inode *dir);
3330 #define btrfs_get_acl NULL
3331 #define btrfs_set_acl NULL
3332 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3333 struct inode *inode, struct inode *dir)
3340 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3341 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3342 struct btrfs_root *root);
3343 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3344 struct btrfs_root *root);
3345 int btrfs_recover_relocation(struct btrfs_root *root);
3346 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3347 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3348 struct btrfs_root *root, struct extent_buffer *buf,
3349 struct extent_buffer *cow);
3350 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3351 u64 *bytes_to_reserve);
3352 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3353 struct btrfs_pending_snapshot *pending);
3356 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3357 u64 end, struct btrfs_scrub_progress *progress,
3358 int readonly, int is_dev_replace);
3359 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3360 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3361 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3362 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3363 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3364 struct btrfs_scrub_progress *progress);
3365 static inline void btrfs_init_full_stripe_locks_tree(
3366 struct btrfs_full_stripe_locks_tree *locks_root)
3368 locks_root->root = RB_ROOT;
3369 mutex_init(&locks_root->lock);
3373 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3374 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3375 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3377 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3379 btrfs_bio_counter_sub(fs_info, 1);
3383 struct reada_control {
3384 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3385 struct btrfs_key key_start;
3386 struct btrfs_key key_end; /* exclusive */
3389 wait_queue_head_t wait;
3391 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3392 struct btrfs_key *start, struct btrfs_key *end);
3393 int btrfs_reada_wait(void *handle);
3394 void btrfs_reada_detach(void *handle);
3395 int btree_readahead_hook(struct extent_buffer *eb, int err);
3397 static inline int is_fstree(u64 rootid)
3399 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3400 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3401 !btrfs_qgroup_level(rootid)))
3406 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3408 return signal_pending(current);
3411 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3413 /* Sanity test specific functions */
3414 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3415 void btrfs_test_inode_set_ops(struct inode *inode);
3416 void btrfs_test_destroy_inode(struct inode *inode);
3418 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3420 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3423 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)