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 <linux/kobject.h>
20 #include <trace/events/btrfs.h>
21 #include <asm/kmap_types.h>
22 #include <asm/unaligned.h>
23 #include <linux/pagemap.h>
24 #include <linux/btrfs.h>
25 #include <linux/btrfs_tree.h>
26 #include <linux/workqueue.h>
27 #include <linux/security.h>
28 #include <linux/sizes.h>
29 #include <linux/dynamic_debug.h>
30 #include <linux/refcount.h>
31 #include <linux/crc32c.h>
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
37 struct btrfs_trans_handle;
38 struct btrfs_transaction;
39 struct btrfs_pending_snapshot;
40 struct btrfs_delayed_ref_root;
41 struct btrfs_space_info;
42 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 struct btrfs_ordered_sum;
49 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
52 * Maximum number of mirrors that can be available for all profiles counting
53 * the target device of dev-replace as one. During an active device replace
54 * procedure, the target device of the copy operation is a mirror for the
55 * filesystem data as well that can be used to read data in order to repair
56 * read errors on other disks.
58 * Current value is derived from RAID1 with 2 copies.
60 #define BTRFS_MAX_MIRRORS (2 + 1)
62 #define BTRFS_MAX_LEVEL 8
64 #define BTRFS_OLDEST_GENERATION 0ULL
67 * the max metadata block size. This limit is somewhat artificial,
68 * but the memmove costs go through the roof for larger blocks.
70 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
73 * we can actually store much bigger names, but lets not confuse the rest
76 #define BTRFS_NAME_LEN 255
79 * Theoretical limit is larger, but we keep this down to a sane
80 * value. That should limit greatly the possibility of collisions on
83 #define BTRFS_LINK_MAX 65535U
85 /* four bytes for CRC32 */
86 static const int btrfs_csum_sizes[] = { 4 };
87 static const char *btrfs_csum_names[] = { "crc32c" };
89 #define BTRFS_EMPTY_DIR_SIZE 0
91 /* ioprio of readahead is set to idle */
92 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
94 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
97 * Use large batch size to reduce overhead of metadata updates. On the reader
98 * side, we only read it when we are close to ENOSPC and the read overhead is
99 * mostly related to the number of CPUs, so it is OK to use arbitrary large
102 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
104 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
108 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
110 static inline u32 count_max_extents(u64 size)
112 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
115 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
117 BUG_ON(num_stripes == 0);
118 return sizeof(struct btrfs_chunk) +
119 sizeof(struct btrfs_stripe) * (num_stripes - 1);
123 * Runtime (in-memory) states of filesystem
126 /* Global indicator of serious filesystem errors */
127 BTRFS_FS_STATE_ERROR,
129 * Filesystem is being remounted, allow to skip some operations, like
132 BTRFS_FS_STATE_REMOUNTING,
133 /* Track if a transaction abort has been reported on this filesystem */
134 BTRFS_FS_STATE_TRANS_ABORTED,
136 * Bio operations should be blocked on this filesystem because a source
137 * or target device is being destroyed as part of a device replace
139 BTRFS_FS_STATE_DEV_REPLACING,
140 /* The btrfs_fs_info created for self-tests */
141 BTRFS_FS_STATE_DUMMY_FS_INFO,
144 #define BTRFS_BACKREF_REV_MAX 256
145 #define BTRFS_BACKREF_REV_SHIFT 56
146 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
147 BTRFS_BACKREF_REV_SHIFT)
149 #define BTRFS_OLD_BACKREF_REV 0
150 #define BTRFS_MIXED_BACKREF_REV 1
153 * every tree block (leaf or node) starts with this header.
155 struct btrfs_header {
156 /* these first four must match the super block */
157 u8 csum[BTRFS_CSUM_SIZE];
158 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
159 __le64 bytenr; /* which block this node is supposed to live in */
162 /* allowed to be different from the super from here on down */
163 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
168 } __attribute__ ((__packed__));
171 * this is a very generous portion of the super block, giving us
172 * room to translate 14 chunks with 3 stripes each.
174 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
177 * just in case we somehow lose the roots and are not able to mount,
178 * we store an array of the roots from previous transactions
181 #define BTRFS_NUM_BACKUP_ROOTS 4
182 struct btrfs_root_backup {
184 __le64 tree_root_gen;
187 __le64 chunk_root_gen;
190 __le64 extent_root_gen;
199 __le64 csum_root_gen;
209 u8 extent_root_level;
213 /* future and to align */
215 } __attribute__ ((__packed__));
218 * the super block basically lists the main trees of the FS
219 * it currently lacks any block count etc etc
221 struct btrfs_super_block {
222 /* the first 4 fields must match struct btrfs_header */
223 u8 csum[BTRFS_CSUM_SIZE];
224 /* FS specific UUID, visible to user */
225 u8 fsid[BTRFS_FSID_SIZE];
226 __le64 bytenr; /* this block number */
229 /* allowed to be different from the btrfs_header from here own down */
236 /* this will help find the new super based on the log root */
237 __le64 log_root_transid;
240 __le64 root_dir_objectid;
244 __le32 __unused_leafsize;
246 __le32 sys_chunk_array_size;
247 __le64 chunk_root_generation;
249 __le64 compat_ro_flags;
250 __le64 incompat_flags;
255 struct btrfs_dev_item dev_item;
257 char label[BTRFS_LABEL_SIZE];
259 __le64 cache_generation;
260 __le64 uuid_tree_generation;
262 /* the UUID written into btree blocks */
263 u8 metadata_uuid[BTRFS_FSID_SIZE];
265 /* future expansion */
267 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
268 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
269 } __attribute__ ((__packed__));
272 * Compat flags that we support. If any incompat flags are set other than the
273 * ones specified below then we will fail to mount
275 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
276 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
277 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
279 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
280 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
281 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
283 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
284 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
286 #define BTRFS_FEATURE_INCOMPAT_SUPP \
287 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
288 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
289 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
290 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
291 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
292 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
293 BTRFS_FEATURE_INCOMPAT_RAID56 | \
294 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
295 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
296 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
297 BTRFS_FEATURE_INCOMPAT_METADATA_UUID)
299 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
300 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
301 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
304 * A leaf is full of items. offset and size tell us where to find
305 * the item in the leaf (relative to the start of the data area)
308 struct btrfs_disk_key key;
311 } __attribute__ ((__packed__));
314 * leaves have an item area and a data area:
315 * [item0, item1....itemN] [free space] [dataN...data1, data0]
317 * The data is separate from the items to get the keys closer together
321 struct btrfs_header header;
322 struct btrfs_item items[];
323 } __attribute__ ((__packed__));
326 * all non-leaf blocks are nodes, they hold only keys and pointers to
329 struct btrfs_key_ptr {
330 struct btrfs_disk_key key;
333 } __attribute__ ((__packed__));
336 struct btrfs_header header;
337 struct btrfs_key_ptr ptrs[];
338 } __attribute__ ((__packed__));
341 * btrfs_paths remember the path taken from the root down to the leaf.
342 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
343 * to any other levels that are present.
345 * The slots array records the index of the item or block pointer
346 * used while walking the tree.
348 enum { READA_NONE, READA_BACK, READA_FORWARD };
350 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
351 int slots[BTRFS_MAX_LEVEL];
352 /* if there is real range locking, this locks field will change */
353 u8 locks[BTRFS_MAX_LEVEL];
355 /* keep some upper locks as we walk down */
359 * set by btrfs_split_item, tells search_slot to keep all locks
360 * and to force calls to keep space in the nodes
362 unsigned int search_for_split:1;
363 unsigned int keep_locks:1;
364 unsigned int skip_locking:1;
365 unsigned int leave_spinning:1;
366 unsigned int search_commit_root:1;
367 unsigned int need_commit_sem:1;
368 unsigned int skip_release_on_error:1;
370 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
371 sizeof(struct btrfs_item))
372 struct btrfs_dev_replace {
373 u64 replace_state; /* see #define above */
374 time64_t time_started; /* seconds since 1-Jan-1970 */
375 time64_t time_stopped; /* seconds since 1-Jan-1970 */
376 atomic64_t num_write_errors;
377 atomic64_t num_uncorrectable_read_errors;
380 u64 committed_cursor_left;
381 u64 cursor_left_last_write_of_item;
384 u64 cont_reading_from_srcdev_mode; /* see #define above */
387 int item_needs_writeback;
388 struct btrfs_device *srcdev;
389 struct btrfs_device *tgtdev;
391 struct mutex lock_finishing_cancel_unmount;
392 struct rw_semaphore rwsem;
394 struct btrfs_scrub_progress scrub_progress;
396 struct percpu_counter bio_counter;
397 wait_queue_head_t replace_wait;
400 /* For raid type sysfs entries */
401 struct raid_kobject {
404 struct list_head list;
408 * free clusters are used to claim free space in relatively large chunks,
409 * allowing us to do less seeky writes. They are used for all metadata
410 * allocations. In ssd_spread mode they are also used for data allocations.
412 struct btrfs_free_cluster {
414 spinlock_t refill_lock;
417 /* largest extent in this cluster */
420 /* first extent starting offset */
423 /* We did a full search and couldn't create a cluster */
426 struct btrfs_block_group_cache *block_group;
428 * when a cluster is allocated from a block group, we put the
429 * cluster onto a list in the block group so that it can
430 * be freed before the block group is freed.
432 struct list_head block_group_list;
435 enum btrfs_caching_type {
439 BTRFS_CACHE_FINISHED,
443 enum btrfs_disk_cache_state {
450 struct btrfs_caching_control {
451 struct list_head list;
453 wait_queue_head_t wait;
454 struct btrfs_work work;
455 struct btrfs_block_group_cache *block_group;
460 /* Once caching_thread() finds this much free space, it will wake up waiters. */
461 #define CACHING_CTL_WAKE_UP SZ_2M
463 struct btrfs_io_ctl {
467 struct btrfs_fs_info *fs_info;
474 unsigned check_crcs:1;
478 * Tree to record all locked full stripes of a RAID5/6 block group
480 struct btrfs_full_stripe_locks_tree {
485 struct btrfs_block_group_cache {
486 struct btrfs_key key;
487 struct btrfs_block_group_item item;
488 struct btrfs_fs_info *fs_info;
496 u64 cache_generation;
499 * If the free space extent count exceeds this number, convert the block
502 u32 bitmap_high_thresh;
505 * If the free space extent count drops below this number, convert the
506 * block group back to extents.
508 u32 bitmap_low_thresh;
511 * It is just used for the delayed data space allocation because
512 * only the data space allocation and the relative metadata update
513 * can be done cross the transaction.
515 struct rw_semaphore data_rwsem;
517 /* for raid56, this is a full stripe, without parity */
518 unsigned long full_stripe_len;
522 unsigned int has_caching_ctl:1;
523 unsigned int removed:1;
525 int disk_cache_state;
527 /* cache tracking stuff */
529 struct btrfs_caching_control *caching_ctl;
530 u64 last_byte_to_unpin;
532 struct btrfs_space_info *space_info;
534 /* free space cache stuff */
535 struct btrfs_free_space_ctl *free_space_ctl;
537 /* block group cache stuff */
538 struct rb_node cache_node;
540 /* for block groups in the same raid type */
541 struct list_head list;
546 /* List of struct btrfs_free_clusters for this block group.
547 * Today it will only have one thing on it, but that may change
549 struct list_head cluster_list;
551 /* For delayed block group creation or deletion of empty block groups */
552 struct list_head bg_list;
554 /* For read-only block groups */
555 struct list_head ro_list;
559 /* For dirty block groups */
560 struct list_head dirty_list;
561 struct list_head io_list;
563 struct btrfs_io_ctl io_ctl;
566 * Incremented when doing extent allocations and holding a read lock
567 * on the space_info's groups_sem semaphore.
568 * Decremented when an ordered extent that represents an IO against this
569 * block group's range is created (after it's added to its inode's
570 * root's list of ordered extents) or immediately after the allocation
571 * if it's a metadata extent or fallocate extent (for these cases we
572 * don't create ordered extents).
574 atomic_t reservations;
577 * Incremented while holding the spinlock *lock* by a task checking if
578 * it can perform a nocow write (incremented if the value for the *ro*
579 * field is 0). Decremented by such tasks once they create an ordered
580 * extent or before that if some error happens before reaching that step.
581 * This is to prevent races between block group relocation and nocow
582 * writes through direct IO.
584 atomic_t nocow_writers;
586 /* Lock for free space tree operations. */
587 struct mutex free_space_lock;
590 * Does the block group need to be added to the free space tree?
591 * Protected by free_space_lock.
593 int needs_free_space;
595 /* Record locked full stripes for RAID5/6 block group */
596 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
599 /* delayed seq elem */
601 struct list_head list;
605 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
607 #define SEQ_LAST ((u64)-1)
609 enum btrfs_orphan_cleanup_state {
610 ORPHAN_CLEANUP_STARTED = 1,
611 ORPHAN_CLEANUP_DONE = 2,
614 /* used by the raid56 code to lock stripes for read/modify/write */
615 struct btrfs_stripe_hash {
616 struct list_head hash_list;
620 /* used by the raid56 code to lock stripes for read/modify/write */
621 struct btrfs_stripe_hash_table {
622 struct list_head stripe_cache;
623 spinlock_t cache_lock;
625 struct btrfs_stripe_hash table[];
628 #define BTRFS_STRIPE_HASH_TABLE_BITS 11
630 void btrfs_init_async_reclaim_work(struct work_struct *work);
633 struct reloc_control;
635 struct btrfs_fs_devices;
636 struct btrfs_balance_control;
637 struct btrfs_delayed_root;
640 * Block group or device which contains an active swapfile. Used for preventing
641 * unsafe operations while a swapfile is active.
643 * These are sorted on (ptr, inode) (note that a block group or device can
644 * contain more than one swapfile). We compare the pointer values because we
645 * don't actually care what the object is, we just need a quick check whether
646 * the object exists in the rbtree.
648 struct btrfs_swapfile_pin {
653 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise,
654 * ptr points to a struct btrfs_device.
659 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
663 BTRFS_FS_CLOSING_START,
664 BTRFS_FS_CLOSING_DONE,
665 BTRFS_FS_LOG_RECOVERING,
667 BTRFS_FS_QUOTA_ENABLED,
668 BTRFS_FS_UPDATE_UUID_TREE_GEN,
669 BTRFS_FS_CREATING_FREE_SPACE_TREE,
673 BTRFS_FS_QUOTA_OVERRIDE,
674 /* Used to record internally whether fs has been frozen */
677 * Indicate that a whole-filesystem exclusive operation is running
678 * (device replace, resize, device add/delete, balance)
682 * To info transaction_kthread we need an immediate commit so it
683 * doesn't need to wait for commit_interval
685 BTRFS_FS_NEED_ASYNC_COMMIT,
687 * Indicate that balance has been set up from the ioctl and is in the
688 * main phase. The fs_info::balance_ctl is initialized.
689 * Set and cleared while holding fs_info::balance_mutex.
691 BTRFS_FS_BALANCE_RUNNING,
693 /* Indicate that the cleaner thread is awake and doing something. */
694 BTRFS_FS_CLEANER_RUNNING,
697 * The checksumming has an optimized version and is considered fast,
698 * so we don't need to offload checksums to workqueues.
700 BTRFS_FS_CSUM_IMPL_FAST,
703 struct btrfs_fs_info {
704 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
706 struct btrfs_root *extent_root;
707 struct btrfs_root *tree_root;
708 struct btrfs_root *chunk_root;
709 struct btrfs_root *dev_root;
710 struct btrfs_root *fs_root;
711 struct btrfs_root *csum_root;
712 struct btrfs_root *quota_root;
713 struct btrfs_root *uuid_root;
714 struct btrfs_root *free_space_root;
716 /* the log root tree is a directory of all the other log roots */
717 struct btrfs_root *log_root_tree;
719 spinlock_t fs_roots_radix_lock;
720 struct radix_tree_root fs_roots_radix;
722 /* block group cache stuff */
723 spinlock_t block_group_cache_lock;
724 u64 first_logical_byte;
725 struct rb_root block_group_cache_tree;
727 /* keep track of unallocated space */
728 atomic64_t free_chunk_space;
730 struct extent_io_tree freed_extents[2];
731 struct extent_io_tree *pinned_extents;
733 /* logical->physical extent mapping */
734 struct extent_map_tree mapping_tree;
737 * block reservation for extent, checksum, root tree and
738 * delayed dir index item
740 struct btrfs_block_rsv global_block_rsv;
741 /* block reservation for metadata operations */
742 struct btrfs_block_rsv trans_block_rsv;
743 /* block reservation for chunk tree */
744 struct btrfs_block_rsv chunk_block_rsv;
745 /* block reservation for delayed operations */
746 struct btrfs_block_rsv delayed_block_rsv;
747 /* block reservation for delayed refs */
748 struct btrfs_block_rsv delayed_refs_rsv;
750 struct btrfs_block_rsv empty_block_rsv;
753 u64 last_trans_committed;
754 u64 avg_delayed_ref_runtime;
757 * this is updated to the current trans every time a full commit
758 * is required instead of the faster short fsync log commits
760 u64 last_trans_log_full_commit;
761 unsigned long mount_opt;
763 * Track requests for actions that need to be done during transaction
764 * commit (like for some mount options).
766 unsigned long pending_changes;
767 unsigned long compress_type:4;
768 unsigned int compress_level;
771 * It is a suggestive number, the read side is safe even it gets a
772 * wrong number because we will write out the data into a regular
773 * extent. The write side(mount/remount) is under ->s_umount lock,
774 * so it is also safe.
778 struct btrfs_transaction *running_transaction;
779 wait_queue_head_t transaction_throttle;
780 wait_queue_head_t transaction_wait;
781 wait_queue_head_t transaction_blocked_wait;
782 wait_queue_head_t async_submit_wait;
785 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
786 * when they are updated.
788 * Because we do not clear the flags for ever, so we needn't use
789 * the lock on the read side.
791 * We also needn't use the lock when we mount the fs, because
792 * there is no other task which will update the flag.
794 spinlock_t super_lock;
795 struct btrfs_super_block *super_copy;
796 struct btrfs_super_block *super_for_commit;
797 struct super_block *sb;
798 struct inode *btree_inode;
799 struct mutex tree_log_mutex;
800 struct mutex transaction_kthread_mutex;
801 struct mutex cleaner_mutex;
802 struct mutex chunk_mutex;
805 * this is taken to make sure we don't set block groups ro after
806 * the free space cache has been allocated on them
808 struct mutex ro_block_group_mutex;
810 /* this is used during read/modify/write to make sure
811 * no two ios are trying to mod the same stripe at the same
814 struct btrfs_stripe_hash_table *stripe_hash_table;
817 * this protects the ordered operations list only while we are
818 * processing all of the entries on it. This way we make
819 * sure the commit code doesn't find the list temporarily empty
820 * because another function happens to be doing non-waiting preflush
821 * before jumping into the main commit.
823 struct mutex ordered_operations_mutex;
825 struct rw_semaphore commit_root_sem;
827 struct rw_semaphore cleanup_work_sem;
829 struct rw_semaphore subvol_sem;
830 struct srcu_struct subvol_srcu;
832 spinlock_t trans_lock;
834 * the reloc mutex goes with the trans lock, it is taken
835 * during commit to protect us from the relocation code
837 struct mutex reloc_mutex;
839 struct list_head trans_list;
840 struct list_head dead_roots;
841 struct list_head caching_block_groups;
843 spinlock_t delayed_iput_lock;
844 struct list_head delayed_iputs;
845 atomic_t nr_delayed_iputs;
846 wait_queue_head_t delayed_iputs_wait;
848 /* this protects tree_mod_seq_list */
849 spinlock_t tree_mod_seq_lock;
850 atomic64_t tree_mod_seq;
851 struct list_head tree_mod_seq_list;
853 /* this protects tree_mod_log */
854 rwlock_t tree_mod_log_lock;
855 struct rb_root tree_mod_log;
857 atomic_t async_delalloc_pages;
860 * this is used to protect the following list -- ordered_roots.
862 spinlock_t ordered_root_lock;
865 * all fs/file tree roots in which there are data=ordered extents
866 * pending writeback are added into this list.
868 * these can span multiple transactions and basically include
869 * every dirty data page that isn't from nodatacow
871 struct list_head ordered_roots;
873 struct mutex delalloc_root_mutex;
874 spinlock_t delalloc_root_lock;
875 /* all fs/file tree roots that have delalloc inodes. */
876 struct list_head delalloc_roots;
879 * there is a pool of worker threads for checksumming during writes
880 * and a pool for checksumming after reads. This is because readers
881 * can run with FS locks held, and the writers may be waiting for
882 * those locks. We don't want ordering in the pending list to cause
883 * deadlocks, and so the two are serviced separately.
885 * A third pool does submit_bio to avoid deadlocking with the other
888 struct btrfs_workqueue *workers;
889 struct btrfs_workqueue *delalloc_workers;
890 struct btrfs_workqueue *flush_workers;
891 struct btrfs_workqueue *endio_workers;
892 struct btrfs_workqueue *endio_meta_workers;
893 struct btrfs_workqueue *endio_raid56_workers;
894 struct btrfs_workqueue *endio_repair_workers;
895 struct btrfs_workqueue *rmw_workers;
896 struct btrfs_workqueue *endio_meta_write_workers;
897 struct btrfs_workqueue *endio_write_workers;
898 struct btrfs_workqueue *endio_freespace_worker;
899 struct btrfs_workqueue *submit_workers;
900 struct btrfs_workqueue *caching_workers;
901 struct btrfs_workqueue *readahead_workers;
904 * fixup workers take dirty pages that didn't properly go through
905 * the cow mechanism and make them safe to write. It happens
906 * for the sys_munmap function call path
908 struct btrfs_workqueue *fixup_workers;
909 struct btrfs_workqueue *delayed_workers;
911 /* the extent workers do delayed refs on the extent allocation tree */
912 struct btrfs_workqueue *extent_workers;
913 struct task_struct *transaction_kthread;
914 struct task_struct *cleaner_kthread;
915 u32 thread_pool_size;
917 struct kobject *space_info_kobj;
918 struct list_head pending_raid_kobjs;
919 spinlock_t pending_raid_kobjs_lock; /* uncontended */
923 /* used to keep from writing metadata until there is a nice batch */
924 struct percpu_counter dirty_metadata_bytes;
925 struct percpu_counter delalloc_bytes;
926 struct percpu_counter dio_bytes;
927 s32 dirty_metadata_batch;
930 struct list_head dirty_cowonly_roots;
932 struct btrfs_fs_devices *fs_devices;
935 * The space_info list is effectively read only after initial
936 * setup. It is populated at mount time and cleaned up after
937 * all block groups are removed. RCU is used to protect it.
939 struct list_head space_info;
941 struct btrfs_space_info *data_sinfo;
943 struct reloc_control *reloc_ctl;
945 /* data_alloc_cluster is only used in ssd_spread mode */
946 struct btrfs_free_cluster data_alloc_cluster;
948 /* all metadata allocations go through this cluster */
949 struct btrfs_free_cluster meta_alloc_cluster;
951 /* auto defrag inodes go here */
952 spinlock_t defrag_inodes_lock;
953 struct rb_root defrag_inodes;
954 atomic_t defrag_running;
956 /* Used to protect avail_{data, metadata, system}_alloc_bits */
957 seqlock_t profiles_lock;
959 * these three are in extended format (availability of single
960 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
961 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
963 u64 avail_data_alloc_bits;
964 u64 avail_metadata_alloc_bits;
965 u64 avail_system_alloc_bits;
967 /* restriper state */
968 spinlock_t balance_lock;
969 struct mutex balance_mutex;
970 atomic_t balance_pause_req;
971 atomic_t balance_cancel_req;
972 struct btrfs_balance_control *balance_ctl;
973 wait_queue_head_t balance_wait_q;
975 u32 data_chunk_allocations;
980 /* private scrub information */
981 struct mutex scrub_lock;
982 atomic_t scrubs_running;
983 atomic_t scrub_pause_req;
984 atomic_t scrubs_paused;
985 atomic_t scrub_cancel_req;
986 wait_queue_head_t scrub_pause_wait;
988 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
991 refcount_t scrub_workers_refcnt;
992 struct btrfs_workqueue *scrub_workers;
993 struct btrfs_workqueue *scrub_wr_completion_workers;
994 struct btrfs_workqueue *scrub_parity_workers;
996 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
997 u32 check_integrity_print_mask;
999 /* is qgroup tracking in a consistent state? */
1002 /* holds configuration and tracking. Protected by qgroup_lock */
1003 struct rb_root qgroup_tree;
1004 spinlock_t qgroup_lock;
1007 * used to avoid frequently calling ulist_alloc()/ulist_free()
1008 * when doing qgroup accounting, it must be protected by qgroup_lock.
1010 struct ulist *qgroup_ulist;
1012 /* protect user change for quota operations */
1013 struct mutex qgroup_ioctl_lock;
1015 /* list of dirty qgroups to be written at next commit */
1016 struct list_head dirty_qgroups;
1018 /* used by qgroup for an efficient tree traversal */
1021 /* qgroup rescan items */
1022 struct mutex qgroup_rescan_lock; /* protects the progress item */
1023 struct btrfs_key qgroup_rescan_progress;
1024 struct btrfs_workqueue *qgroup_rescan_workers;
1025 struct completion qgroup_rescan_completion;
1026 struct btrfs_work qgroup_rescan_work;
1027 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
1029 /* filesystem state */
1030 unsigned long fs_state;
1032 struct btrfs_delayed_root *delayed_root;
1034 /* readahead tree */
1035 spinlock_t reada_lock;
1036 struct radix_tree_root reada_tree;
1038 /* readahead works cnt */
1039 atomic_t reada_works_cnt;
1041 /* Extent buffer radix tree */
1042 spinlock_t buffer_lock;
1043 struct radix_tree_root buffer_radix;
1045 /* next backup root to be overwritten */
1046 int backup_root_index;
1048 /* device replace state */
1049 struct btrfs_dev_replace dev_replace;
1051 struct semaphore uuid_tree_rescan_sem;
1053 /* Used to reclaim the metadata space in the background. */
1054 struct work_struct async_reclaim_work;
1056 spinlock_t unused_bgs_lock;
1057 struct list_head unused_bgs;
1058 struct mutex unused_bg_unpin_mutex;
1059 struct mutex delete_unused_bgs_mutex;
1061 /* Cached block sizes */
1066 /* Block groups and devices containing active swapfiles. */
1067 spinlock_t swapfile_pins_lock;
1068 struct rb_root swapfile_pins;
1070 struct crypto_shash *csum_shash;
1073 * Number of send operations in progress.
1074 * Updated while holding fs_info::balance_mutex.
1076 int send_in_progress;
1078 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1079 spinlock_t ref_verify_lock;
1080 struct rb_root block_tree;
1084 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1086 return sb->s_fs_info;
1089 struct btrfs_subvolume_writers {
1090 struct percpu_counter counter;
1091 wait_queue_head_t wait;
1095 * The state of btrfs root
1099 * btrfs_record_root_in_trans is a multi-step process, and it can race
1100 * with the balancing code. But the race is very small, and only the
1101 * first time the root is added to each transaction. So IN_TRANS_SETUP
1102 * is used to tell us when more checks are required
1104 BTRFS_ROOT_IN_TRANS_SETUP,
1105 BTRFS_ROOT_REF_COWS,
1106 BTRFS_ROOT_TRACK_DIRTY,
1107 BTRFS_ROOT_IN_RADIX,
1108 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1109 BTRFS_ROOT_DEFRAG_RUNNING,
1110 BTRFS_ROOT_FORCE_COW,
1111 BTRFS_ROOT_MULTI_LOG_TASKS,
1113 BTRFS_ROOT_DELETING,
1116 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1118 * Set for the subvolume tree owning the reloc tree.
1120 BTRFS_ROOT_DEAD_RELOC_TREE,
1121 /* Mark dead root stored on device whose cleanup needs to be resumed */
1122 BTRFS_ROOT_DEAD_TREE,
1126 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1127 * code. For detail check comment in fs/btrfs/qgroup.c.
1129 struct btrfs_qgroup_swapped_blocks {
1131 /* RM_EMPTY_ROOT() of above blocks[] */
1133 struct rb_root blocks[BTRFS_MAX_LEVEL];
1137 * in ram representation of the tree. extent_root is used for all allocations
1138 * and for the extent tree extent_root root.
1141 struct extent_buffer *node;
1143 struct extent_buffer *commit_root;
1144 struct btrfs_root *log_root;
1145 struct btrfs_root *reloc_root;
1147 unsigned long state;
1148 struct btrfs_root_item root_item;
1149 struct btrfs_key root_key;
1150 struct btrfs_fs_info *fs_info;
1151 struct extent_io_tree dirty_log_pages;
1153 struct mutex objectid_mutex;
1155 spinlock_t accounting_lock;
1156 struct btrfs_block_rsv *block_rsv;
1158 /* free ino cache stuff */
1159 struct btrfs_free_space_ctl *free_ino_ctl;
1160 enum btrfs_caching_type ino_cache_state;
1161 spinlock_t ino_cache_lock;
1162 wait_queue_head_t ino_cache_wait;
1163 struct btrfs_free_space_ctl *free_ino_pinned;
1164 u64 ino_cache_progress;
1165 struct inode *ino_cache_inode;
1167 struct mutex log_mutex;
1168 wait_queue_head_t log_writer_wait;
1169 wait_queue_head_t log_commit_wait[2];
1170 struct list_head log_ctxs[2];
1171 atomic_t log_writers;
1172 atomic_t log_commit[2];
1175 /* No matter the commit succeeds or not*/
1176 int log_transid_committed;
1177 /* Just be updated when the commit succeeds. */
1178 int last_log_commit;
1179 pid_t log_start_pid;
1185 u64 highest_objectid;
1187 u64 defrag_trans_start;
1188 struct btrfs_key defrag_progress;
1189 struct btrfs_key defrag_max;
1191 /* the dirty list is only used by non-reference counted roots */
1192 struct list_head dirty_list;
1194 struct list_head root_list;
1196 spinlock_t log_extents_lock[2];
1197 struct list_head logged_list[2];
1199 int orphan_cleanup_state;
1201 spinlock_t inode_lock;
1202 /* red-black tree that keeps track of in-memory inodes */
1203 struct rb_root inode_tree;
1206 * radix tree that keeps track of delayed nodes of every inode,
1207 * protected by inode_lock
1209 struct radix_tree_root delayed_nodes_tree;
1211 * right now this just gets used so that a root has its own devid
1212 * for stat. It may be used for more later
1216 spinlock_t root_item_lock;
1219 struct mutex delalloc_mutex;
1220 spinlock_t delalloc_lock;
1222 * all of the inodes that have delalloc bytes. It is possible for
1223 * this list to be empty even when there is still dirty data=ordered
1224 * extents waiting to finish IO.
1226 struct list_head delalloc_inodes;
1227 struct list_head delalloc_root;
1228 u64 nr_delalloc_inodes;
1230 struct mutex ordered_extent_mutex;
1232 * this is used by the balancing code to wait for all the pending
1235 spinlock_t ordered_extent_lock;
1238 * all of the data=ordered extents pending writeback
1239 * these can span multiple transactions and basically include
1240 * every dirty data page that isn't from nodatacow
1242 struct list_head ordered_extents;
1243 struct list_head ordered_root;
1244 u64 nr_ordered_extents;
1247 * Not empty if this subvolume root has gone through tree block swap
1250 * Will be used by reloc_control::dirty_subvol_roots.
1252 struct list_head reloc_dirty_list;
1255 * Number of currently running SEND ioctls to prevent
1256 * manipulation with the read-only status via SUBVOL_SETFLAGS
1258 int send_in_progress;
1260 * Number of currently running deduplication operations that have a
1261 * destination inode belonging to this root. Protected by the lock
1264 int dedupe_in_progress;
1265 struct btrfs_subvolume_writers *subv_writers;
1266 atomic_t will_be_snapshotted;
1267 atomic_t snapshot_force_cow;
1269 /* For qgroup metadata reserved space */
1270 spinlock_t qgroup_meta_rsv_lock;
1271 u64 qgroup_meta_rsv_pertrans;
1272 u64 qgroup_meta_rsv_prealloc;
1274 /* Number of active swapfiles */
1275 atomic_t nr_swapfiles;
1277 /* Record pairs of swapped blocks for qgroup */
1278 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1280 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1285 struct btrfs_file_private {
1289 static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
1291 return btrfs_sb(inode->i_sb)->sectorsize;
1294 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1297 return info->nodesize - sizeof(struct btrfs_header);
1300 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1302 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1304 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1307 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1309 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1312 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1313 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1314 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1316 return BTRFS_MAX_ITEM_SIZE(info) -
1317 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1320 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1322 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1326 * Flags for mount options.
1328 * Note: don't forget to add new options to btrfs_show_options()
1330 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1331 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1332 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1333 #define BTRFS_MOUNT_SSD (1 << 3)
1334 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1335 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1336 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1337 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1338 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1339 #define BTRFS_MOUNT_NOSSD (1 << 9)
1340 #define BTRFS_MOUNT_DISCARD (1 << 10)
1341 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1342 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1343 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1344 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1345 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1346 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1347 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1348 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1349 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1350 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1351 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1352 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1353 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1354 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1355 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1356 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1357 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1358 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1360 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1361 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1363 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1364 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1365 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1366 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1369 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1371 if (!btrfs_test_opt(fs_info, opt)) \
1372 btrfs_info(fs_info, fmt, ##args); \
1373 btrfs_set_opt(fs_info->mount_opt, opt); \
1376 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1378 if (btrfs_test_opt(fs_info, opt)) \
1379 btrfs_info(fs_info, fmt, ##args); \
1380 btrfs_clear_opt(fs_info->mount_opt, opt); \
1383 #ifdef CONFIG_BTRFS_DEBUG
1385 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
1387 struct btrfs_fs_info *fs_info = block_group->fs_info;
1389 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
1390 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
1391 (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
1392 block_group->flags & BTRFS_BLOCK_GROUP_DATA);
1397 * Requests for changes that need to be done during transaction commit.
1399 * Internal mount options that are used for special handling of the real
1400 * mount options (eg. cannot be set during remount and have to be set during
1401 * transaction commit)
1404 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1405 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1406 #define BTRFS_PENDING_COMMIT (2)
1408 #define btrfs_test_pending(info, opt) \
1409 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1410 #define btrfs_set_pending(info, opt) \
1411 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1412 #define btrfs_clear_pending(info, opt) \
1413 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1416 * Helpers for setting pending mount option changes.
1418 * Expects corresponding macros
1419 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1421 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1423 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1424 btrfs_info((info), fmt, ##args); \
1425 btrfs_set_pending((info), SET_##opt); \
1426 btrfs_clear_pending((info), CLEAR_##opt); \
1430 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1432 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1433 btrfs_info((info), fmt, ##args); \
1434 btrfs_set_pending((info), CLEAR_##opt); \
1435 btrfs_clear_pending((info), SET_##opt); \
1442 #define BTRFS_INODE_NODATASUM (1 << 0)
1443 #define BTRFS_INODE_NODATACOW (1 << 1)
1444 #define BTRFS_INODE_READONLY (1 << 2)
1445 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1446 #define BTRFS_INODE_PREALLOC (1 << 4)
1447 #define BTRFS_INODE_SYNC (1 << 5)
1448 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1449 #define BTRFS_INODE_APPEND (1 << 7)
1450 #define BTRFS_INODE_NODUMP (1 << 8)
1451 #define BTRFS_INODE_NOATIME (1 << 9)
1452 #define BTRFS_INODE_DIRSYNC (1 << 10)
1453 #define BTRFS_INODE_COMPRESS (1 << 11)
1455 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1457 #define BTRFS_INODE_FLAG_MASK \
1458 (BTRFS_INODE_NODATASUM | \
1459 BTRFS_INODE_NODATACOW | \
1460 BTRFS_INODE_READONLY | \
1461 BTRFS_INODE_NOCOMPRESS | \
1462 BTRFS_INODE_PREALLOC | \
1463 BTRFS_INODE_SYNC | \
1464 BTRFS_INODE_IMMUTABLE | \
1465 BTRFS_INODE_APPEND | \
1466 BTRFS_INODE_NODUMP | \
1467 BTRFS_INODE_NOATIME | \
1468 BTRFS_INODE_DIRSYNC | \
1469 BTRFS_INODE_COMPRESS | \
1470 BTRFS_INODE_ROOT_ITEM_INIT)
1472 struct btrfs_map_token {
1473 const struct extent_buffer *eb;
1475 unsigned long offset;
1478 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1479 ((bytes) >> (fs_info)->sb->s_blocksize_bits)
1481 static inline void btrfs_init_map_token (struct btrfs_map_token *token)
1483 token->kaddr = NULL;
1486 /* some macros to generate set/get functions for the struct fields. This
1487 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1490 #define le8_to_cpu(v) (v)
1491 #define cpu_to_le8(v) (v)
1494 #define read_eb_member(eb, ptr, type, member, result) (\
1495 read_extent_buffer(eb, (char *)(result), \
1496 ((unsigned long)(ptr)) + \
1497 offsetof(type, member), \
1498 sizeof(((type *)0)->member)))
1500 #define write_eb_member(eb, ptr, type, member, result) (\
1501 write_extent_buffer(eb, (char *)(result), \
1502 ((unsigned long)(ptr)) + \
1503 offsetof(type, member), \
1504 sizeof(((type *)0)->member)))
1506 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1507 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \
1508 const void *ptr, unsigned long off, \
1509 struct btrfs_map_token *token); \
1510 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \
1511 unsigned long off, u##bits val, \
1512 struct btrfs_map_token *token); \
1513 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1515 unsigned long off) \
1517 return btrfs_get_token_##bits(eb, ptr, off, NULL); \
1519 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
1520 unsigned long off, u##bits val) \
1522 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \
1525 DECLARE_BTRFS_SETGET_BITS(8)
1526 DECLARE_BTRFS_SETGET_BITS(16)
1527 DECLARE_BTRFS_SETGET_BITS(32)
1528 DECLARE_BTRFS_SETGET_BITS(64)
1530 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1531 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1534 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1535 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1537 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \
1540 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1541 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1543 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
1545 struct btrfs_map_token *token) \
1547 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1548 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
1550 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \
1551 type *s, u##bits val, \
1552 struct btrfs_map_token *token) \
1554 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1555 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
1558 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1559 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1561 const type *p = page_address(eb->pages[0]); \
1562 u##bits res = le##bits##_to_cpu(p->member); \
1565 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1568 type *p = page_address(eb->pages[0]); \
1569 p->member = cpu_to_le##bits(val); \
1572 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1573 static inline u##bits btrfs_##name(const type *s) \
1575 return le##bits##_to_cpu(s->member); \
1577 static inline void btrfs_set_##name(type *s, u##bits val) \
1579 s->member = cpu_to_le##bits(val); \
1583 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb,
1584 struct btrfs_dev_item *s)
1586 BUILD_BUG_ON(sizeof(u64) !=
1587 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1588 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1591 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
1592 struct btrfs_dev_item *s,
1595 BUILD_BUG_ON(sizeof(u64) !=
1596 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1597 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1598 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1602 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1603 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1604 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1605 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1606 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1608 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1609 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1610 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1611 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1612 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1613 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1615 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1618 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1620 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1622 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1624 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1626 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1627 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1629 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1631 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1633 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1636 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1638 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1641 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1643 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1646 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1647 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1648 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1649 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1650 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1651 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1652 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1653 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1654 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1655 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1656 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1658 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1660 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1665 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1671 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1673 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1676 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1678 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1679 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1681 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1684 unsigned long offset = (unsigned long)c;
1685 offset += offsetof(struct btrfs_chunk, stripe);
1686 offset += nr * sizeof(struct btrfs_stripe);
1687 return (struct btrfs_stripe *)offset;
1690 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1692 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1695 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1696 struct btrfs_chunk *c, int nr)
1698 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1701 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1702 struct btrfs_chunk *c, int nr)
1704 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1707 /* struct btrfs_block_group_item */
1708 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1710 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1712 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1713 struct btrfs_block_group_item, chunk_objectid, 64);
1715 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1716 struct btrfs_block_group_item, chunk_objectid, 64);
1717 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1718 struct btrfs_block_group_item, flags, 64);
1719 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1720 struct btrfs_block_group_item, flags, 64);
1722 /* struct btrfs_free_space_info */
1723 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1725 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1727 /* struct btrfs_inode_ref */
1728 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1729 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1731 /* struct btrfs_inode_extref */
1732 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1733 parent_objectid, 64);
1734 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1736 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1738 /* struct btrfs_inode_item */
1739 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1740 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1741 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1742 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1743 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1744 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1745 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1746 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1747 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1748 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1749 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1750 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1762 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1763 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1764 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1765 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1766 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1767 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1768 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1769 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1770 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1771 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1773 /* struct btrfs_dev_extent */
1774 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1776 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1777 chunk_objectid, 64);
1778 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1780 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1782 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1784 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1785 return (unsigned long)dev + ptr;
1788 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1789 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1791 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1793 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1796 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1798 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1799 struct btrfs_tree_block_info *item,
1800 struct btrfs_disk_key *key)
1802 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1805 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1806 struct btrfs_tree_block_info *item,
1807 struct btrfs_disk_key *key)
1809 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1812 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1814 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1816 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1818 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1821 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1824 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1826 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1829 static inline u32 btrfs_extent_inline_ref_size(int type)
1831 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1832 type == BTRFS_SHARED_BLOCK_REF_KEY)
1833 return sizeof(struct btrfs_extent_inline_ref);
1834 if (type == BTRFS_SHARED_DATA_REF_KEY)
1835 return sizeof(struct btrfs_shared_data_ref) +
1836 sizeof(struct btrfs_extent_inline_ref);
1837 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1838 return sizeof(struct btrfs_extent_data_ref) +
1839 offsetof(struct btrfs_extent_inline_ref, offset);
1843 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1844 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1846 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1847 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1849 /* struct btrfs_node */
1850 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1851 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1852 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1854 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1857 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1860 ptr = offsetof(struct btrfs_node, ptrs) +
1861 sizeof(struct btrfs_key_ptr) * nr;
1862 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1865 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1869 ptr = offsetof(struct btrfs_node, ptrs) +
1870 sizeof(struct btrfs_key_ptr) * nr;
1871 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1874 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1877 ptr = offsetof(struct btrfs_node, ptrs) +
1878 sizeof(struct btrfs_key_ptr) * nr;
1879 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1882 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1886 ptr = offsetof(struct btrfs_node, ptrs) +
1887 sizeof(struct btrfs_key_ptr) * nr;
1888 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1891 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1893 return offsetof(struct btrfs_node, ptrs) +
1894 sizeof(struct btrfs_key_ptr) * nr;
1897 void btrfs_node_key(const struct extent_buffer *eb,
1898 struct btrfs_disk_key *disk_key, int nr);
1900 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1901 struct btrfs_disk_key *disk_key, int nr)
1904 ptr = btrfs_node_key_ptr_offset(nr);
1905 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1906 struct btrfs_key_ptr, key, disk_key);
1909 /* struct btrfs_item */
1910 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1911 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1912 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1913 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1915 static inline unsigned long btrfs_item_nr_offset(int nr)
1917 return offsetof(struct btrfs_leaf, items) +
1918 sizeof(struct btrfs_item) * nr;
1921 static inline struct btrfs_item *btrfs_item_nr(int nr)
1923 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1926 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1927 struct btrfs_item *item)
1929 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1932 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1934 return btrfs_item_end(eb, btrfs_item_nr(nr));
1937 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1939 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1942 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1944 return btrfs_item_size(eb, btrfs_item_nr(nr));
1947 static inline void btrfs_item_key(const struct extent_buffer *eb,
1948 struct btrfs_disk_key *disk_key, int nr)
1950 struct btrfs_item *item = btrfs_item_nr(nr);
1951 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1954 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1955 struct btrfs_disk_key *disk_key, int nr)
1957 struct btrfs_item *item = btrfs_item_nr(nr);
1958 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1961 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1964 * struct btrfs_root_ref
1966 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1967 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1968 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1970 /* struct btrfs_dir_item */
1971 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1972 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1973 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1974 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1975 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1976 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1978 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1980 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1983 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1984 const struct btrfs_dir_item *item,
1985 struct btrfs_disk_key *key)
1987 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1990 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1991 struct btrfs_dir_item *item,
1992 const struct btrfs_disk_key *key)
1994 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1997 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1999 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2001 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2004 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2005 const struct btrfs_free_space_header *h,
2006 struct btrfs_disk_key *key)
2008 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2011 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2012 struct btrfs_free_space_header *h,
2013 const struct btrfs_disk_key *key)
2015 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2018 /* struct btrfs_disk_key */
2019 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2021 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2022 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2024 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2025 const struct btrfs_disk_key *disk)
2027 cpu->offset = le64_to_cpu(disk->offset);
2028 cpu->type = disk->type;
2029 cpu->objectid = le64_to_cpu(disk->objectid);
2032 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2033 const struct btrfs_key *cpu)
2035 disk->offset = cpu_to_le64(cpu->offset);
2036 disk->type = cpu->type;
2037 disk->objectid = cpu_to_le64(cpu->objectid);
2040 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2041 struct btrfs_key *key, int nr)
2043 struct btrfs_disk_key disk_key;
2044 btrfs_node_key(eb, &disk_key, nr);
2045 btrfs_disk_key_to_cpu(key, &disk_key);
2048 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2049 struct btrfs_key *key, int nr)
2051 struct btrfs_disk_key disk_key;
2052 btrfs_item_key(eb, &disk_key, nr);
2053 btrfs_disk_key_to_cpu(key, &disk_key);
2056 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2057 const struct btrfs_dir_item *item,
2058 struct btrfs_key *key)
2060 struct btrfs_disk_key disk_key;
2061 btrfs_dir_item_key(eb, item, &disk_key);
2062 btrfs_disk_key_to_cpu(key, &disk_key);
2065 static inline u8 btrfs_key_type(const struct btrfs_key *key)
2070 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2075 /* struct btrfs_header */
2076 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2077 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2079 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2080 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2081 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2082 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2083 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2085 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2086 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2088 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2090 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2092 return (btrfs_header_flags(eb) & flag) == flag;
2095 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2097 u64 flags = btrfs_header_flags(eb);
2098 btrfs_set_header_flags(eb, flags | flag);
2101 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2103 u64 flags = btrfs_header_flags(eb);
2104 btrfs_set_header_flags(eb, flags & ~flag);
2107 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2109 u64 flags = btrfs_header_flags(eb);
2110 return flags >> BTRFS_BACKREF_REV_SHIFT;
2113 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2116 u64 flags = btrfs_header_flags(eb);
2117 flags &= ~BTRFS_BACKREF_REV_MASK;
2118 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2119 btrfs_set_header_flags(eb, flags);
2122 static inline unsigned long btrfs_header_fsid(void)
2124 return offsetof(struct btrfs_header, fsid);
2127 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
2129 return offsetof(struct btrfs_header, chunk_tree_uuid);
2132 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2134 return btrfs_header_level(eb) == 0;
2137 /* struct btrfs_root_item */
2138 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2140 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2141 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2142 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2144 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2146 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2147 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2148 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2149 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2150 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2151 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2152 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2153 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2155 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2157 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2159 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2161 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2163 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2166 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2168 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2171 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2173 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2176 /* struct btrfs_root_backup */
2177 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2179 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2181 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2182 tree_root_level, 8);
2184 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2186 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2187 chunk_root_gen, 64);
2188 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2189 chunk_root_level, 8);
2191 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2193 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2194 extent_root_gen, 64);
2195 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2196 extent_root_level, 8);
2198 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2200 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2202 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2205 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2207 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2209 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2212 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2214 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2216 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2217 csum_root_level, 8);
2218 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2220 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2222 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2225 /* struct btrfs_balance_item */
2226 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2228 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2229 const struct btrfs_balance_item *bi,
2230 struct btrfs_disk_balance_args *ba)
2232 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2235 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2236 struct btrfs_balance_item *bi,
2237 const struct btrfs_disk_balance_args *ba)
2239 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2242 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2243 const struct btrfs_balance_item *bi,
2244 struct btrfs_disk_balance_args *ba)
2246 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2249 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2250 struct btrfs_balance_item *bi,
2251 const struct btrfs_disk_balance_args *ba)
2253 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2256 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2257 const struct btrfs_balance_item *bi,
2258 struct btrfs_disk_balance_args *ba)
2260 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2263 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2264 struct btrfs_balance_item *bi,
2265 const struct btrfs_disk_balance_args *ba)
2267 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2271 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2272 const struct btrfs_disk_balance_args *disk)
2274 memset(cpu, 0, sizeof(*cpu));
2276 cpu->profiles = le64_to_cpu(disk->profiles);
2277 cpu->usage = le64_to_cpu(disk->usage);
2278 cpu->devid = le64_to_cpu(disk->devid);
2279 cpu->pstart = le64_to_cpu(disk->pstart);
2280 cpu->pend = le64_to_cpu(disk->pend);
2281 cpu->vstart = le64_to_cpu(disk->vstart);
2282 cpu->vend = le64_to_cpu(disk->vend);
2283 cpu->target = le64_to_cpu(disk->target);
2284 cpu->flags = le64_to_cpu(disk->flags);
2285 cpu->limit = le64_to_cpu(disk->limit);
2286 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2287 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2291 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2292 const struct btrfs_balance_args *cpu)
2294 memset(disk, 0, sizeof(*disk));
2296 disk->profiles = cpu_to_le64(cpu->profiles);
2297 disk->usage = cpu_to_le64(cpu->usage);
2298 disk->devid = cpu_to_le64(cpu->devid);
2299 disk->pstart = cpu_to_le64(cpu->pstart);
2300 disk->pend = cpu_to_le64(cpu->pend);
2301 disk->vstart = cpu_to_le64(cpu->vstart);
2302 disk->vend = cpu_to_le64(cpu->vend);
2303 disk->target = cpu_to_le64(cpu->target);
2304 disk->flags = cpu_to_le64(cpu->flags);
2305 disk->limit = cpu_to_le64(cpu->limit);
2306 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2307 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2310 /* struct btrfs_super_block */
2311 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2312 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2313 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2315 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2316 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2317 struct btrfs_super_block, sys_chunk_array_size, 32);
2318 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2319 struct btrfs_super_block, chunk_root_generation, 64);
2320 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2322 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2324 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2325 chunk_root_level, 8);
2326 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2328 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2329 log_root_transid, 64);
2330 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2332 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2334 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2336 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2338 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2340 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2342 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2343 root_dir_objectid, 64);
2344 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2346 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2348 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2349 compat_ro_flags, 64);
2350 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2351 incompat_flags, 64);
2352 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2354 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2355 cache_generation, 64);
2356 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2357 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2358 uuid_tree_generation, 64);
2360 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
2362 u16 t = btrfs_super_csum_type(s);
2364 * csum type is validated at mount time
2366 return btrfs_csum_sizes[t];
2369 static inline const char *btrfs_super_csum_name(u16 csum_type)
2371 /* csum type is validated at mount time */
2372 return btrfs_csum_names[csum_type];
2376 * The leaf data grows from end-to-front in the node.
2377 * this returns the address of the start of the last item,
2378 * which is the stop of the leaf data stack
2380 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2382 u32 nr = btrfs_header_nritems(leaf);
2385 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2386 return btrfs_item_offset_nr(leaf, nr - 1);
2389 /* struct btrfs_file_extent_item */
2390 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2391 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2392 struct btrfs_file_extent_item, disk_bytenr, 64);
2393 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2394 struct btrfs_file_extent_item, offset, 64);
2395 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2396 struct btrfs_file_extent_item, generation, 64);
2397 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2398 struct btrfs_file_extent_item, num_bytes, 64);
2399 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2400 struct btrfs_file_extent_item, disk_num_bytes, 64);
2401 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2402 struct btrfs_file_extent_item, compression, 8);
2404 static inline unsigned long
2405 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2407 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2410 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2412 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2415 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2417 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2419 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2420 disk_num_bytes, 64);
2421 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2423 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2425 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2427 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2429 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2431 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2432 other_encoding, 16);
2435 * this returns the number of bytes used by the item on disk, minus the
2436 * size of any extent headers. If a file is compressed on disk, this is
2437 * the compressed size
2439 static inline u32 btrfs_file_extent_inline_item_len(
2440 const struct extent_buffer *eb,
2441 struct btrfs_item *e)
2443 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2446 /* btrfs_dev_stats_item */
2447 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
2448 const struct btrfs_dev_stats_item *ptr,
2453 read_extent_buffer(eb, &val,
2454 offsetof(struct btrfs_dev_stats_item, values) +
2455 ((unsigned long)ptr) + (index * sizeof(u64)),
2460 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
2461 struct btrfs_dev_stats_item *ptr,
2464 write_extent_buffer(eb, &val,
2465 offsetof(struct btrfs_dev_stats_item, values) +
2466 ((unsigned long)ptr) + (index * sizeof(u64)),
2470 /* btrfs_qgroup_status_item */
2471 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2473 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2475 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2477 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2480 /* btrfs_qgroup_info_item */
2481 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2483 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2484 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2486 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2487 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2490 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2491 struct btrfs_qgroup_info_item, generation, 64);
2492 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2494 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2495 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2496 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2498 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2499 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2501 /* btrfs_qgroup_limit_item */
2502 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2504 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2506 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2508 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2510 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2513 /* btrfs_dev_replace_item */
2514 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2515 struct btrfs_dev_replace_item, src_devid, 64);
2516 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2517 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2519 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2521 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2523 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2525 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2526 num_write_errors, 64);
2527 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2528 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2530 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2532 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2536 struct btrfs_dev_replace_item, src_devid, 64);
2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2538 struct btrfs_dev_replace_item,
2539 cont_reading_from_srcdev_mode, 64);
2540 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2541 struct btrfs_dev_replace_item, replace_state, 64);
2542 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2543 struct btrfs_dev_replace_item, time_started, 64);
2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2545 struct btrfs_dev_replace_item, time_stopped, 64);
2546 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2547 struct btrfs_dev_replace_item, num_write_errors, 64);
2548 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2549 struct btrfs_dev_replace_item,
2550 num_uncorrectable_read_errors, 64);
2551 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2552 struct btrfs_dev_replace_item, cursor_left, 64);
2553 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2554 struct btrfs_dev_replace_item, cursor_right, 64);
2556 /* helper function to cast into the data area of the leaf. */
2557 #define btrfs_item_ptr(leaf, slot, type) \
2558 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2559 btrfs_item_offset_nr(leaf, slot)))
2561 #define btrfs_item_ptr_offset(leaf, slot) \
2562 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2563 btrfs_item_offset_nr(leaf, slot)))
2565 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2567 return crc32c(crc, address, length);
2570 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2572 put_unaligned_le32(~crc, result);
2575 static inline u64 btrfs_name_hash(const char *name, int len)
2577 return crc32c((u32)~1, name, len);
2581 * Figure the key offset of an extended inode ref
2583 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2586 return (u64) crc32c(parent_objectid, name, len);
2589 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2591 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2596 enum btrfs_inline_ref_type {
2597 BTRFS_REF_TYPE_INVALID,
2598 BTRFS_REF_TYPE_BLOCK,
2599 BTRFS_REF_TYPE_DATA,
2603 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2604 struct btrfs_extent_inline_ref *iref,
2605 enum btrfs_inline_ref_type is_data);
2607 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
2609 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
2612 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2616 * Doing a truncate won't result in new nodes or leaves, just what we need for
2619 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
2622 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2625 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
2627 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
2628 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2629 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
2630 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
2631 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2632 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2633 unsigned long count);
2634 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2635 struct btrfs_delayed_ref_root *delayed_refs,
2636 struct btrfs_delayed_ref_head *head);
2637 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2638 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2639 struct btrfs_fs_info *fs_info, u64 bytenr,
2640 u64 offset, int metadata, u64 *refs, u64 *flags);
2641 int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
2642 u64 bytenr, u64 num, int reserved);
2643 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
2644 u64 bytenr, u64 num_bytes);
2645 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2646 int btrfs_cross_ref_exist(struct btrfs_root *root,
2647 u64 objectid, u64 offset, u64 bytenr);
2648 struct btrfs_block_group_cache *btrfs_lookup_block_group(
2649 struct btrfs_fs_info *info,
2651 void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
2652 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2653 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2654 struct btrfs_root *root,
2655 u64 parent, u64 root_objectid,
2656 const struct btrfs_disk_key *key,
2657 int level, u64 hint,
2659 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2660 struct btrfs_root *root,
2661 struct extent_buffer *buf,
2662 u64 parent, int last_ref);
2663 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2664 struct btrfs_root *root, u64 owner,
2665 u64 offset, u64 ram_bytes,
2666 struct btrfs_key *ins);
2667 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2668 u64 root_objectid, u64 owner, u64 offset,
2669 struct btrfs_key *ins);
2670 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2671 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2672 struct btrfs_key *ins, int is_data, int delalloc);
2673 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2674 struct extent_buffer *buf, int full_backref);
2675 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2676 struct extent_buffer *buf, int full_backref);
2677 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2678 u64 bytenr, u64 num_bytes, u64 flags,
2679 int level, int is_data);
2680 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2682 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2683 u64 start, u64 len, int delalloc);
2684 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
2685 u64 start, u64 len);
2686 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
2687 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2688 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2689 struct btrfs_ref *generic_ref);
2691 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
2692 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
2693 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
2694 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2695 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2696 int btrfs_read_block_groups(struct btrfs_fs_info *info);
2697 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
2698 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2699 u64 bytes_used, u64 type, u64 chunk_offset,
2701 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info);
2702 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
2703 struct btrfs_fs_info *fs_info,
2704 const u64 chunk_offset);
2705 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
2706 u64 group_start, struct extent_map *em);
2707 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
2708 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
2709 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
2710 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
2711 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
2712 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
2713 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
2714 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2716 enum btrfs_reserve_flush_enum {
2717 /* If we are in the transaction, we can't flush anything.*/
2718 BTRFS_RESERVE_NO_FLUSH,
2720 * Flushing delalloc may cause deadlock somewhere, in this
2721 * case, use FLUSH LIMIT
2723 BTRFS_RESERVE_FLUSH_LIMIT,
2724 BTRFS_RESERVE_FLUSH_ALL,
2727 enum btrfs_flush_state {
2728 FLUSH_DELAYED_ITEMS_NR = 1,
2729 FLUSH_DELAYED_ITEMS = 2,
2730 FLUSH_DELAYED_REFS_NR = 3,
2731 FLUSH_DELAYED_REFS = 4,
2733 FLUSH_DELALLOC_WAIT = 6,
2735 ALLOC_CHUNK_FORCE = 8,
2740 * control flags for do_chunk_alloc's force field
2741 * CHUNK_ALLOC_NO_FORCE means to only allocate a chunk
2742 * if we really need one.
2744 * CHUNK_ALLOC_LIMITED means to only try and allocate one
2745 * if we have very few chunks already allocated. This is
2746 * used as part of the clustering code to help make sure
2747 * we have a good pool of storage to cluster in, without
2748 * filling the FS with empty chunks
2750 * CHUNK_ALLOC_FORCE means it must try to allocate one
2753 enum btrfs_chunk_alloc_enum {
2754 CHUNK_ALLOC_NO_FORCE,
2755 CHUNK_ALLOC_LIMITED,
2759 int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
2760 enum btrfs_chunk_alloc_enum force);
2761 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2762 struct btrfs_block_rsv *rsv,
2763 int nitems, bool use_global_rsv);
2764 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
2765 struct btrfs_block_rsv *rsv);
2766 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes,
2769 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2770 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache);
2771 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
2772 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2773 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2774 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2775 u64 start, u64 end);
2776 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2777 u64 num_bytes, u64 *actual_bytes);
2778 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
2779 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2781 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2782 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2783 struct btrfs_fs_info *fs_info);
2784 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2785 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2786 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2787 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
2788 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2789 u64 start, u64 end);
2790 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
2793 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2794 int level, int *slot);
2795 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2796 int btrfs_previous_item(struct btrfs_root *root,
2797 struct btrfs_path *path, u64 min_objectid,
2799 int btrfs_previous_extent_item(struct btrfs_root *root,
2800 struct btrfs_path *path, u64 min_objectid);
2801 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2802 struct btrfs_path *path,
2803 const struct btrfs_key *new_key);
2804 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2805 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2806 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root);
2807 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2808 struct btrfs_key *key, int lowest_level,
2810 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2811 struct btrfs_path *path,
2813 enum btrfs_compare_tree_result {
2814 BTRFS_COMPARE_TREE_NEW,
2815 BTRFS_COMPARE_TREE_DELETED,
2816 BTRFS_COMPARE_TREE_CHANGED,
2817 BTRFS_COMPARE_TREE_SAME,
2819 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path,
2820 struct btrfs_path *right_path,
2821 struct btrfs_key *key,
2822 enum btrfs_compare_tree_result result,
2824 int btrfs_compare_trees(struct btrfs_root *left_root,
2825 struct btrfs_root *right_root,
2826 btrfs_changed_cb_t cb, void *ctx);
2827 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2828 struct btrfs_root *root, struct extent_buffer *buf,
2829 struct extent_buffer *parent, int parent_slot,
2830 struct extent_buffer **cow_ret);
2831 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2832 struct btrfs_root *root,
2833 struct extent_buffer *buf,
2834 struct extent_buffer **cow_ret, u64 new_root_objectid);
2835 int btrfs_block_can_be_shared(struct btrfs_root *root,
2836 struct extent_buffer *buf);
2837 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2838 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2839 int btrfs_split_item(struct btrfs_trans_handle *trans,
2840 struct btrfs_root *root,
2841 struct btrfs_path *path,
2842 const struct btrfs_key *new_key,
2843 unsigned long split_offset);
2844 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2845 struct btrfs_root *root,
2846 struct btrfs_path *path,
2847 const struct btrfs_key *new_key);
2848 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2849 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2850 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2851 const struct btrfs_key *key, struct btrfs_path *p,
2852 int ins_len, int cow);
2853 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2854 struct btrfs_path *p, u64 time_seq);
2855 int btrfs_search_slot_for_read(struct btrfs_root *root,
2856 const struct btrfs_key *key,
2857 struct btrfs_path *p, int find_higher,
2859 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2860 struct btrfs_root *root, struct extent_buffer *parent,
2861 int start_slot, u64 *last_ret,
2862 struct btrfs_key *progress);
2863 void btrfs_release_path(struct btrfs_path *p);
2864 struct btrfs_path *btrfs_alloc_path(void);
2865 void btrfs_free_path(struct btrfs_path *p);
2866 void btrfs_set_path_blocking(struct btrfs_path *p);
2867 void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
2869 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2870 struct btrfs_path *path, int slot, int nr);
2871 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2872 struct btrfs_root *root,
2873 struct btrfs_path *path)
2875 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2878 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2879 const struct btrfs_key *cpu_key, u32 *data_size,
2880 u32 total_data, u32 total_size, int nr);
2881 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2882 const struct btrfs_key *key, void *data, u32 data_size);
2883 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2884 struct btrfs_root *root,
2885 struct btrfs_path *path,
2886 const struct btrfs_key *cpu_key, u32 *data_size,
2889 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2890 struct btrfs_root *root,
2891 struct btrfs_path *path,
2892 const struct btrfs_key *key,
2895 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2898 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2899 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2900 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2902 static inline int btrfs_next_old_item(struct btrfs_root *root,
2903 struct btrfs_path *p, u64 time_seq)
2906 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2907 return btrfs_next_old_leaf(root, p, time_seq);
2910 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2912 return btrfs_next_old_item(root, p, 0);
2914 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2915 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
2916 struct btrfs_block_rsv *block_rsv,
2917 int update_ref, int for_reloc);
2918 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2919 struct btrfs_root *root,
2920 struct extent_buffer *node,
2921 struct extent_buffer *parent);
2922 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2925 * Do it this way so we only ever do one test_bit in the normal case.
2927 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2928 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2936 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2937 * anything except sleeping. This function is used to check the status of
2940 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2942 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2945 static inline void free_fs_info(struct btrfs_fs_info *fs_info)
2947 kfree(fs_info->balance_ctl);
2948 kfree(fs_info->delayed_root);
2949 kfree(fs_info->extent_root);
2950 kfree(fs_info->tree_root);
2951 kfree(fs_info->chunk_root);
2952 kfree(fs_info->dev_root);
2953 kfree(fs_info->csum_root);
2954 kfree(fs_info->quota_root);
2955 kfree(fs_info->uuid_root);
2956 kfree(fs_info->free_space_root);
2957 kfree(fs_info->super_copy);
2958 kfree(fs_info->super_for_commit);
2962 /* tree mod log functions from ctree.c */
2963 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2964 struct seq_list *elem);
2965 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2966 struct seq_list *elem);
2967 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2970 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2971 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2973 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2974 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2976 int btrfs_del_root(struct btrfs_trans_handle *trans,
2977 const struct btrfs_key *key);
2978 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2979 const struct btrfs_key *key,
2980 struct btrfs_root_item *item);
2981 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2982 struct btrfs_root *root,
2983 struct btrfs_key *key,
2984 struct btrfs_root_item *item);
2985 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2986 struct btrfs_path *path, struct btrfs_root_item *root_item,
2987 struct btrfs_key *root_key);
2988 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2989 void btrfs_set_root_node(struct btrfs_root_item *item,
2990 struct extent_buffer *node);
2991 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2992 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2993 struct btrfs_root *root);
2996 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2998 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3000 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
3001 int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
3005 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3006 const char *name, int name_len);
3007 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3008 int name_len, struct btrfs_inode *dir,
3009 struct btrfs_key *location, u8 type, u64 index);
3010 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3011 struct btrfs_root *root,
3012 struct btrfs_path *path, u64 dir,
3013 const char *name, int name_len,
3015 struct btrfs_dir_item *
3016 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3017 struct btrfs_root *root,
3018 struct btrfs_path *path, u64 dir,
3019 u64 objectid, const char *name, int name_len,
3021 struct btrfs_dir_item *
3022 btrfs_search_dir_index_item(struct btrfs_root *root,
3023 struct btrfs_path *path, u64 dirid,
3024 const char *name, int name_len);
3025 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3026 struct btrfs_root *root,
3027 struct btrfs_path *path,
3028 struct btrfs_dir_item *di);
3029 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3030 struct btrfs_root *root,
3031 struct btrfs_path *path, u64 objectid,
3032 const char *name, u16 name_len,
3033 const void *data, u16 data_len);
3034 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3035 struct btrfs_root *root,
3036 struct btrfs_path *path, u64 dir,
3037 const char *name, u16 name_len,
3039 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3040 struct btrfs_path *path,
3045 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3046 struct btrfs_root *root, u64 offset);
3047 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3048 struct btrfs_root *root, u64 offset);
3049 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3052 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3053 struct btrfs_root *root,
3054 const char *name, int name_len,
3055 u64 inode_objectid, u64 ref_objectid, u64 index);
3056 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3057 struct btrfs_root *root,
3058 const char *name, int name_len,
3059 u64 inode_objectid, u64 ref_objectid, u64 *index);
3060 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3061 struct btrfs_root *root,
3062 struct btrfs_path *path, u64 objectid);
3063 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3064 *root, struct btrfs_path *path,
3065 struct btrfs_key *location, int mod);
3067 struct btrfs_inode_extref *
3068 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3069 struct btrfs_root *root,
3070 struct btrfs_path *path,
3071 const char *name, int name_len,
3072 u64 inode_objectid, u64 ref_objectid, int ins_len,
3075 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot,
3077 int name_len, struct btrfs_inode_ref **ref_ret);
3078 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot,
3079 u64 ref_objectid, const char *name,
3081 struct btrfs_inode_extref **extref_ret);
3084 struct btrfs_dio_private;
3085 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3086 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
3087 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
3089 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
3090 u64 logical_offset);
3091 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3092 struct btrfs_root *root,
3093 u64 objectid, u64 pos,
3094 u64 disk_offset, u64 disk_num_bytes,
3095 u64 num_bytes, u64 offset, u64 ram_bytes,
3096 u8 compression, u8 encryption, u16 other_encoding);
3097 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3098 struct btrfs_root *root,
3099 struct btrfs_path *path, u64 objectid,
3100 u64 bytenr, int mod);
3101 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3102 struct btrfs_root *root,
3103 struct btrfs_ordered_sum *sums);
3104 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
3105 u64 file_start, int contig);
3106 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3107 struct list_head *list, int search_commit);
3108 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3109 const struct btrfs_path *path,
3110 struct btrfs_file_extent_item *fi,
3111 const bool new_inline,
3112 struct extent_map *em);
3115 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3116 u64 start, u64 len);
3117 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3118 u64 *orig_start, u64 *orig_block_len,
3121 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3122 struct btrfs_inode *inode);
3123 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3124 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3125 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3126 struct btrfs_root *root,
3127 struct btrfs_inode *dir, struct btrfs_inode *inode,
3128 const char *name, int name_len);
3129 int btrfs_add_link(struct btrfs_trans_handle *trans,
3130 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3131 const char *name, int name_len, int add_backref, u64 index);
3132 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3133 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3135 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3136 struct btrfs_root *root,
3137 struct inode *inode, u64 new_size,
3140 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3141 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr);
3142 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
3143 unsigned int extra_bits,
3144 struct extent_state **cached_state, int dedupe);
3145 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3146 struct btrfs_root *new_root,
3147 struct btrfs_root *parent_root,
3149 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3151 void btrfs_clear_delalloc_extent(struct inode *inode,
3152 struct extent_state *state, unsigned *bits);
3153 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3154 struct extent_state *other);
3155 void btrfs_split_delalloc_extent(struct inode *inode,
3156 struct extent_state *orig, u64 split);
3157 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3158 unsigned long bio_flags);
3159 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3160 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3161 int btrfs_readpage(struct file *file, struct page *page);
3162 void btrfs_evict_inode(struct inode *inode);
3163 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3164 struct inode *btrfs_alloc_inode(struct super_block *sb);
3165 void btrfs_destroy_inode(struct inode *inode);
3166 void btrfs_free_inode(struct inode *inode);
3167 int btrfs_drop_inode(struct inode *inode);
3168 int __init btrfs_init_cachep(void);
3169 void __cold btrfs_destroy_cachep(void);
3170 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location,
3171 struct btrfs_root *root, int *new,
3172 struct btrfs_path *path);
3173 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3174 struct btrfs_root *root, int *was_new);
3175 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3176 struct page *page, size_t pg_offset,
3177 u64 start, u64 end, int create);
3178 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3179 struct btrfs_root *root,
3180 struct inode *inode);
3181 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3182 struct btrfs_root *root, struct inode *inode);
3183 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3184 struct btrfs_inode *inode);
3185 int btrfs_orphan_cleanup(struct btrfs_root *root);
3186 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3187 void btrfs_add_delayed_iput(struct inode *inode);
3188 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3189 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3190 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3191 u64 start, u64 num_bytes, u64 min_size,
3192 loff_t actual_len, u64 *alloc_hint);
3193 int btrfs_prealloc_file_range_trans(struct inode *inode,
3194 struct btrfs_trans_handle *trans, int mode,
3195 u64 start, u64 num_bytes, u64 min_size,
3196 loff_t actual_len, u64 *alloc_hint);
3197 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
3198 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3199 struct writeback_control *wbc);
3200 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3201 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3202 u64 end, int uptodate);
3203 extern const struct dentry_operations btrfs_dentry_operations;
3206 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3207 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3208 int btrfs_ioctl_get_supported_features(void __user *arg);
3209 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3210 int btrfs_is_empty_uuid(u8 *uuid);
3211 int btrfs_defrag_file(struct inode *inode, struct file *file,
3212 struct btrfs_ioctl_defrag_range_args *range,
3213 u64 newer_than, unsigned long max_pages);
3214 void btrfs_get_block_group_info(struct list_head *groups_list,
3215 struct btrfs_ioctl_space_info *space);
3216 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3217 struct btrfs_ioctl_balance_args *bargs);
3220 int __init btrfs_auto_defrag_init(void);
3221 void __cold btrfs_auto_defrag_exit(void);
3222 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3223 struct btrfs_inode *inode);
3224 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3225 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3226 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3227 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3229 extern const struct file_operations btrfs_file_operations;
3230 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3231 struct btrfs_root *root, struct inode *inode,
3232 struct btrfs_path *path, u64 start, u64 end,
3233 u64 *drop_end, int drop_cache,
3235 u32 extent_item_size,
3237 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3238 struct btrfs_root *root, struct inode *inode, u64 start,
3239 u64 end, int drop_cache);
3240 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3241 struct btrfs_inode *inode, u64 start, u64 end);
3242 int btrfs_release_file(struct inode *inode, struct file *file);
3243 int btrfs_dirty_pages(struct inode *inode, struct page **pages,
3244 size_t num_pages, loff_t pos, size_t write_bytes,
3245 struct extent_state **cached);
3246 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3247 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
3248 struct file *file_out, loff_t pos_out,
3249 loff_t len, unsigned int remap_flags);
3252 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3253 struct btrfs_root *root);
3256 int __init btrfs_init_sysfs(void);
3257 void __cold btrfs_exit_sysfs(void);
3258 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
3259 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
3262 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3263 unsigned long new_flags);
3264 int btrfs_sync_fs(struct super_block *sb, int wait);
3266 static inline __printf(2, 3) __cold
3267 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3271 #ifdef CONFIG_PRINTK
3274 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3276 #define btrfs_printk(fs_info, fmt, args...) \
3277 btrfs_no_printk(fs_info, fmt, ##args)
3280 #define btrfs_emerg(fs_info, fmt, args...) \
3281 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3282 #define btrfs_alert(fs_info, fmt, args...) \
3283 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3284 #define btrfs_crit(fs_info, fmt, args...) \
3285 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3286 #define btrfs_err(fs_info, fmt, args...) \
3287 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3288 #define btrfs_warn(fs_info, fmt, args...) \
3289 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3290 #define btrfs_notice(fs_info, fmt, args...) \
3291 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3292 #define btrfs_info(fs_info, fmt, args...) \
3293 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3296 * Wrappers that use printk_in_rcu
3298 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3299 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3300 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3301 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3302 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3303 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3304 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3305 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3306 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3307 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3308 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3309 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3310 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3311 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3314 * Wrappers that use a ratelimited printk_in_rcu
3316 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3317 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3318 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3319 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3320 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3321 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3322 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3323 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3324 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3325 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3326 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3327 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3328 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3329 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3332 * Wrappers that use a ratelimited printk
3334 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3335 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3336 #define btrfs_alert_rl(fs_info, fmt, args...) \
3337 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3338 #define btrfs_crit_rl(fs_info, fmt, args...) \
3339 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3340 #define btrfs_err_rl(fs_info, fmt, args...) \
3341 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3342 #define btrfs_warn_rl(fs_info, fmt, args...) \
3343 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3344 #define btrfs_notice_rl(fs_info, fmt, args...) \
3345 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3346 #define btrfs_info_rl(fs_info, fmt, args...) \
3347 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3349 #if defined(CONFIG_DYNAMIC_DEBUG)
3350 #define btrfs_debug(fs_info, fmt, args...) \
3351 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3352 fs_info, KERN_DEBUG fmt, ##args)
3353 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3354 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3355 fs_info, KERN_DEBUG fmt, ##args)
3356 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3357 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3358 fs_info, KERN_DEBUG fmt, ##args)
3359 #define btrfs_debug_rl(fs_info, fmt, args...) \
3360 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3361 fs_info, KERN_DEBUG fmt, ##args)
3362 #elif defined(DEBUG)
3363 #define btrfs_debug(fs_info, fmt, args...) \
3364 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3365 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3366 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3367 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3368 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3369 #define btrfs_debug_rl(fs_info, fmt, args...) \
3370 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3372 #define btrfs_debug(fs_info, fmt, args...) \
3373 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3374 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3375 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3376 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3377 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3378 #define btrfs_debug_rl(fs_info, fmt, args...) \
3379 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3382 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3385 btrfs_printk(fs_info, fmt, ##args); \
3386 rcu_read_unlock(); \
3389 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3392 btrfs_no_printk(fs_info, fmt, ##args); \
3393 rcu_read_unlock(); \
3396 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3398 static DEFINE_RATELIMIT_STATE(_rs, \
3399 DEFAULT_RATELIMIT_INTERVAL, \
3400 DEFAULT_RATELIMIT_BURST); \
3401 if (__ratelimit(&_rs)) \
3402 btrfs_printk(fs_info, fmt, ##args); \
3405 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3408 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3409 rcu_read_unlock(); \
3413 static inline void assfail(const char *expr, const char *file, int line)
3415 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
3416 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3421 #define ASSERT(expr) \
3422 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
3425 * Use that for functions that are conditionally exported for sanity tests but
3428 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3429 #define EXPORT_FOR_TESTS static
3431 #define EXPORT_FOR_TESTS
3435 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3438 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3443 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3444 unsigned int line, int errno, const char *fmt, ...);
3446 const char *btrfs_decode_error(int errno);
3449 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3450 const char *function,
3451 unsigned int line, int errno);
3454 * Call btrfs_abort_transaction as early as possible when an error condition is
3455 * detected, that way the exact line number is reported.
3457 #define btrfs_abort_transaction(trans, errno) \
3459 /* Report first abort since mount */ \
3460 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3461 &((trans)->fs_info->fs_state))) { \
3462 if ((errno) != -EIO) { \
3463 WARN(1, KERN_DEBUG \
3464 "BTRFS: Transaction aborted (error %d)\n", \
3467 btrfs_debug((trans)->fs_info, \
3468 "Transaction aborted (error %d)", \
3472 __btrfs_abort_transaction((trans), __func__, \
3473 __LINE__, (errno)); \
3476 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3478 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3479 (errno), fmt, ##args); \
3484 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3485 unsigned int line, int errno, const char *fmt, ...);
3487 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3488 * will panic(). Otherwise we BUG() here.
3490 #define btrfs_panic(fs_info, errno, fmt, args...) \
3492 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3497 /* compatibility and incompatibility defines */
3499 #define btrfs_set_fs_incompat(__fs_info, opt) \
3500 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3503 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3504 u64 flag, const char* name)
3506 struct btrfs_super_block *disk_super;
3509 disk_super = fs_info->super_copy;
3510 features = btrfs_super_incompat_flags(disk_super);
3511 if (!(features & flag)) {
3512 spin_lock(&fs_info->super_lock);
3513 features = btrfs_super_incompat_flags(disk_super);
3514 if (!(features & flag)) {
3516 btrfs_set_super_incompat_flags(disk_super, features);
3518 "setting incompat feature flag for %s (0x%llx)",
3521 spin_unlock(&fs_info->super_lock);
3525 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3526 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3529 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3530 u64 flag, const char* name)
3532 struct btrfs_super_block *disk_super;
3535 disk_super = fs_info->super_copy;
3536 features = btrfs_super_incompat_flags(disk_super);
3537 if (features & flag) {
3538 spin_lock(&fs_info->super_lock);
3539 features = btrfs_super_incompat_flags(disk_super);
3540 if (features & flag) {
3542 btrfs_set_super_incompat_flags(disk_super, features);
3544 "clearing incompat feature flag for %s (0x%llx)",
3547 spin_unlock(&fs_info->super_lock);
3551 #define btrfs_fs_incompat(fs_info, opt) \
3552 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3554 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3556 struct btrfs_super_block *disk_super;
3557 disk_super = fs_info->super_copy;
3558 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3561 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3562 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3565 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3566 u64 flag, const char *name)
3568 struct btrfs_super_block *disk_super;
3571 disk_super = fs_info->super_copy;
3572 features = btrfs_super_compat_ro_flags(disk_super);
3573 if (!(features & flag)) {
3574 spin_lock(&fs_info->super_lock);
3575 features = btrfs_super_compat_ro_flags(disk_super);
3576 if (!(features & flag)) {
3578 btrfs_set_super_compat_ro_flags(disk_super, features);
3580 "setting compat-ro feature flag for %s (0x%llx)",
3583 spin_unlock(&fs_info->super_lock);
3587 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3588 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3591 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3592 u64 flag, const char *name)
3594 struct btrfs_super_block *disk_super;
3597 disk_super = fs_info->super_copy;
3598 features = btrfs_super_compat_ro_flags(disk_super);
3599 if (features & flag) {
3600 spin_lock(&fs_info->super_lock);
3601 features = btrfs_super_compat_ro_flags(disk_super);
3602 if (features & flag) {
3604 btrfs_set_super_compat_ro_flags(disk_super, features);
3606 "clearing compat-ro feature flag for %s (0x%llx)",
3609 spin_unlock(&fs_info->super_lock);
3613 #define btrfs_fs_compat_ro(fs_info, opt) \
3614 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3616 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3618 struct btrfs_super_block *disk_super;
3619 disk_super = fs_info->super_copy;
3620 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3624 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3625 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3626 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3627 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3628 struct inode *inode, struct inode *dir);
3630 #define btrfs_get_acl NULL
3631 #define btrfs_set_acl NULL
3632 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3633 struct inode *inode, struct inode *dir)
3640 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3641 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3642 struct btrfs_root *root);
3643 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3644 struct btrfs_root *root);
3645 int btrfs_recover_relocation(struct btrfs_root *root);
3646 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
3647 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3648 struct btrfs_root *root, struct extent_buffer *buf,
3649 struct extent_buffer *cow);
3650 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3651 u64 *bytes_to_reserve);
3652 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3653 struct btrfs_pending_snapshot *pending);
3656 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3657 u64 end, struct btrfs_scrub_progress *progress,
3658 int readonly, int is_dev_replace);
3659 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3660 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3661 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3662 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3663 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3664 struct btrfs_scrub_progress *progress);
3665 static inline void btrfs_init_full_stripe_locks_tree(
3666 struct btrfs_full_stripe_locks_tree *locks_root)
3668 locks_root->root = RB_ROOT;
3669 mutex_init(&locks_root->lock);
3673 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3674 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3675 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3677 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3679 btrfs_bio_counter_sub(fs_info, 1);
3683 struct reada_control {
3684 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3685 struct btrfs_key key_start;
3686 struct btrfs_key key_end; /* exclusive */
3689 wait_queue_head_t wait;
3691 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3692 struct btrfs_key *start, struct btrfs_key *end);
3693 int btrfs_reada_wait(void *handle);
3694 void btrfs_reada_detach(void *handle);
3695 int btree_readahead_hook(struct extent_buffer *eb, int err);
3697 static inline int is_fstree(u64 rootid)
3699 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3700 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3701 !btrfs_qgroup_level(rootid)))
3706 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3708 return signal_pending(current);
3711 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3713 /* Sanity test specific functions */
3714 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3715 void btrfs_test_inode_set_ops(struct inode *inode);
3716 void btrfs_test_destroy_inode(struct inode *inode);
3718 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3720 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3723 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3729 static inline void cond_wake_up(struct wait_queue_head *wq)
3732 * This implies a full smp_mb barrier, see comments for
3733 * waitqueue_active why.
3735 if (wq_has_sleeper(wq))
3739 static inline void cond_wake_up_nomb(struct wait_queue_head *wq)
3742 * Special case for conditional wakeup where the barrier required for
3743 * waitqueue_active is implied by some of the preceding code. Eg. one
3744 * of such atomic operations (atomic_dec_and_return, ...), or a
3745 * unlock/lock sequence, etc.
3747 if (waitqueue_active(wq))