1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/unaligned.h>
21 #include <linux/pagemap.h>
22 #include <linux/btrfs.h>
23 #include <linux/btrfs_tree.h>
24 #include <linux/workqueue.h>
25 #include <linux/security.h>
26 #include <linux/sizes.h>
27 #include <linux/dynamic_debug.h>
28 #include <linux/refcount.h>
29 #include <linux/crc32c.h>
30 #include <linux/iomap.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
38 struct btrfs_trans_handle;
39 struct btrfs_transaction;
40 struct btrfs_pending_snapshot;
41 struct btrfs_delayed_ref_root;
42 struct btrfs_space_info;
43 struct btrfs_block_group;
44 extern struct kmem_cache *btrfs_trans_handle_cachep;
45 extern struct kmem_cache *btrfs_bit_radix_cachep;
46 extern struct kmem_cache *btrfs_path_cachep;
47 extern struct kmem_cache *btrfs_free_space_cachep;
48 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
49 struct btrfs_ordered_sum;
52 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
55 * Maximum number of mirrors that can be available for all profiles counting
56 * the target device of dev-replace as one. During an active device replace
57 * procedure, the target device of the copy operation is a mirror for the
58 * filesystem data as well that can be used to read data in order to repair
59 * read errors on other disks.
61 * Current value is derived from RAID1C4 with 4 copies.
63 #define BTRFS_MAX_MIRRORS (4 + 1)
65 #define BTRFS_MAX_LEVEL 8
67 #define BTRFS_OLDEST_GENERATION 0ULL
70 * we can actually store much bigger names, but lets not confuse the rest
73 #define BTRFS_NAME_LEN 255
76 * Theoretical limit is larger, but we keep this down to a sane
77 * value. That should limit greatly the possibility of collisions on
80 #define BTRFS_LINK_MAX 65535U
82 #define BTRFS_EMPTY_DIR_SIZE 0
84 /* ioprio of readahead is set to idle */
85 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
87 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
90 * Use large batch size to reduce overhead of metadata updates. On the reader
91 * side, we only read it when we are close to ENOSPC and the read overhead is
92 * mostly related to the number of CPUs, so it is OK to use arbitrary large
95 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
97 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
100 * Deltas are an effective way to populate global statistics. Give macro names
101 * to make it clear what we're doing. An example is discard_extents in
102 * btrfs_free_space_ctl.
104 #define BTRFS_STAT_NR_ENTRIES 2
105 #define BTRFS_STAT_CURR 0
106 #define BTRFS_STAT_PREV 1
109 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
111 static inline u32 count_max_extents(u64 size)
113 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
116 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
118 BUG_ON(num_stripes == 0);
119 return sizeof(struct btrfs_chunk) +
120 sizeof(struct btrfs_stripe) * (num_stripes - 1);
124 * Runtime (in-memory) states of filesystem
127 /* Global indicator of serious filesystem errors */
128 BTRFS_FS_STATE_ERROR,
130 * Filesystem is being remounted, allow to skip some operations, like
133 BTRFS_FS_STATE_REMOUNTING,
134 /* Track if a transaction abort has been reported on this filesystem */
135 BTRFS_FS_STATE_TRANS_ABORTED,
137 * Bio operations should be blocked on this filesystem because a source
138 * or target device is being destroyed as part of a device replace
140 BTRFS_FS_STATE_DEV_REPLACING,
141 /* The btrfs_fs_info created for self-tests */
142 BTRFS_FS_STATE_DUMMY_FS_INFO,
145 #define BTRFS_BACKREF_REV_MAX 256
146 #define BTRFS_BACKREF_REV_SHIFT 56
147 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
148 BTRFS_BACKREF_REV_SHIFT)
150 #define BTRFS_OLD_BACKREF_REV 0
151 #define BTRFS_MIXED_BACKREF_REV 1
154 * every tree block (leaf or node) starts with this header.
156 struct btrfs_header {
157 /* these first four must match the super block */
158 u8 csum[BTRFS_CSUM_SIZE];
159 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
160 __le64 bytenr; /* which block this node is supposed to live in */
163 /* allowed to be different from the super from here on down */
164 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
169 } __attribute__ ((__packed__));
172 * this is a very generous portion of the super block, giving us
173 * room to translate 14 chunks with 3 stripes each.
175 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
178 * just in case we somehow lose the roots and are not able to mount,
179 * we store an array of the roots from previous transactions
182 #define BTRFS_NUM_BACKUP_ROOTS 4
183 struct btrfs_root_backup {
185 __le64 tree_root_gen;
188 __le64 chunk_root_gen;
191 __le64 extent_root_gen;
200 __le64 csum_root_gen;
210 u8 extent_root_level;
214 /* future and to align */
216 } __attribute__ ((__packed__));
219 * the super block basically lists the main trees of the FS
220 * it currently lacks any block count etc etc
222 struct btrfs_super_block {
223 /* the first 4 fields must match struct btrfs_header */
224 u8 csum[BTRFS_CSUM_SIZE];
225 /* FS specific UUID, visible to user */
226 u8 fsid[BTRFS_FSID_SIZE];
227 __le64 bytenr; /* this block number */
230 /* allowed to be different from the btrfs_header from here own down */
237 /* this will help find the new super based on the log root */
238 __le64 log_root_transid;
241 __le64 root_dir_objectid;
245 __le32 __unused_leafsize;
247 __le32 sys_chunk_array_size;
248 __le64 chunk_root_generation;
250 __le64 compat_ro_flags;
251 __le64 incompat_flags;
256 struct btrfs_dev_item dev_item;
258 char label[BTRFS_LABEL_SIZE];
260 __le64 cache_generation;
261 __le64 uuid_tree_generation;
263 /* the UUID written into btree blocks */
264 u8 metadata_uuid[BTRFS_FSID_SIZE];
266 /* future expansion */
268 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
269 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
270 } __attribute__ ((__packed__));
273 * Compat flags that we support. If any incompat flags are set other than the
274 * ones specified below then we will fail to mount
276 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
277 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
278 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
280 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
281 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
282 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
284 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
285 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
287 #define BTRFS_FEATURE_INCOMPAT_SUPP \
288 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
289 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
290 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
291 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
292 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
293 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
294 BTRFS_FEATURE_INCOMPAT_RAID56 | \
295 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
296 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
297 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
298 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
299 BTRFS_FEATURE_INCOMPAT_RAID1C34)
301 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
302 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
303 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
306 * A leaf is full of items. offset and size tell us where to find
307 * the item in the leaf (relative to the start of the data area)
310 struct btrfs_disk_key key;
313 } __attribute__ ((__packed__));
316 * leaves have an item area and a data area:
317 * [item0, item1....itemN] [free space] [dataN...data1, data0]
319 * The data is separate from the items to get the keys closer together
323 struct btrfs_header header;
324 struct btrfs_item items[];
325 } __attribute__ ((__packed__));
328 * all non-leaf blocks are nodes, they hold only keys and pointers to
331 struct btrfs_key_ptr {
332 struct btrfs_disk_key key;
335 } __attribute__ ((__packed__));
338 struct btrfs_header header;
339 struct btrfs_key_ptr ptrs[];
340 } __attribute__ ((__packed__));
343 * btrfs_paths remember the path taken from the root down to the leaf.
344 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
345 * to any other levels that are present.
347 * The slots array records the index of the item or block pointer
348 * used while walking the tree.
350 enum { READA_NONE, READA_BACK, READA_FORWARD };
352 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
353 int slots[BTRFS_MAX_LEVEL];
354 /* if there is real range locking, this locks field will change */
355 u8 locks[BTRFS_MAX_LEVEL];
357 /* keep some upper locks as we walk down */
361 * set by btrfs_split_item, tells search_slot to keep all locks
362 * and to force calls to keep space in the nodes
364 unsigned int search_for_split:1;
365 unsigned int keep_locks:1;
366 unsigned int skip_locking:1;
367 unsigned int search_commit_root:1;
368 unsigned int need_commit_sem:1;
369 unsigned int skip_release_on_error:1;
371 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
372 sizeof(struct btrfs_item))
373 struct btrfs_dev_replace {
374 u64 replace_state; /* see #define above */
375 time64_t time_started; /* seconds since 1-Jan-1970 */
376 time64_t time_stopped; /* seconds since 1-Jan-1970 */
377 atomic64_t num_write_errors;
378 atomic64_t num_uncorrectable_read_errors;
381 u64 committed_cursor_left;
382 u64 cursor_left_last_write_of_item;
385 u64 cont_reading_from_srcdev_mode; /* see #define above */
388 int item_needs_writeback;
389 struct btrfs_device *srcdev;
390 struct btrfs_device *tgtdev;
392 struct mutex lock_finishing_cancel_unmount;
393 struct rw_semaphore rwsem;
395 struct btrfs_scrub_progress scrub_progress;
397 struct percpu_counter bio_counter;
398 wait_queue_head_t replace_wait;
402 * free clusters are used to claim free space in relatively large chunks,
403 * allowing us to do less seeky writes. They are used for all metadata
404 * allocations. In ssd_spread mode they are also used for data allocations.
406 struct btrfs_free_cluster {
408 spinlock_t refill_lock;
411 /* largest extent in this cluster */
414 /* first extent starting offset */
417 /* We did a full search and couldn't create a cluster */
420 struct btrfs_block_group *block_group;
422 * when a cluster is allocated from a block group, we put the
423 * cluster onto a list in the block group so that it can
424 * be freed before the block group is freed.
426 struct list_head block_group_list;
429 enum btrfs_caching_type {
433 BTRFS_CACHE_FINISHED,
438 * Tree to record all locked full stripes of a RAID5/6 block group
440 struct btrfs_full_stripe_locks_tree {
445 /* Discard control. */
447 * Async discard uses multiple lists to differentiate the discard filter
448 * parameters. Index 0 is for completely free block groups where we need to
449 * ensure the entire block group is trimmed without being lossy. Indices
450 * afterwards represent monotonically decreasing discard filter sizes to
451 * prioritize what should be discarded next.
453 #define BTRFS_NR_DISCARD_LISTS 3
454 #define BTRFS_DISCARD_INDEX_UNUSED 0
455 #define BTRFS_DISCARD_INDEX_START 1
457 struct btrfs_discard_ctl {
458 struct workqueue_struct *discard_workers;
459 struct delayed_work work;
461 struct btrfs_block_group *block_group;
462 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
464 u64 prev_discard_time;
465 atomic_t discardable_extents;
466 atomic64_t discardable_bytes;
467 u64 max_discard_size;
471 u64 discard_extent_bytes;
472 u64 discard_bitmap_bytes;
473 atomic64_t discard_bytes_saved;
476 /* delayed seq elem */
478 struct list_head list;
482 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
484 #define SEQ_LAST ((u64)-1)
486 enum btrfs_orphan_cleanup_state {
487 ORPHAN_CLEANUP_STARTED = 1,
488 ORPHAN_CLEANUP_DONE = 2,
491 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
494 struct reloc_control;
496 struct btrfs_fs_devices;
497 struct btrfs_balance_control;
498 struct btrfs_delayed_root;
501 * Block group or device which contains an active swapfile. Used for preventing
502 * unsafe operations while a swapfile is active.
504 * These are sorted on (ptr, inode) (note that a block group or device can
505 * contain more than one swapfile). We compare the pointer values because we
506 * don't actually care what the object is, we just need a quick check whether
507 * the object exists in the rbtree.
509 struct btrfs_swapfile_pin {
514 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
515 * points to a struct btrfs_device.
520 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
524 BTRFS_FS_CLOSING_START,
525 BTRFS_FS_CLOSING_DONE,
526 BTRFS_FS_LOG_RECOVERING,
528 BTRFS_FS_QUOTA_ENABLED,
529 BTRFS_FS_UPDATE_UUID_TREE_GEN,
530 BTRFS_FS_CREATING_FREE_SPACE_TREE,
534 BTRFS_FS_QUOTA_OVERRIDE,
535 /* Used to record internally whether fs has been frozen */
538 * Indicate that balance has been set up from the ioctl and is in the
539 * main phase. The fs_info::balance_ctl is initialized.
540 * Set and cleared while holding fs_info::balance_mutex.
542 BTRFS_FS_BALANCE_RUNNING,
544 /* Indicate that the cleaner thread is awake and doing something. */
545 BTRFS_FS_CLEANER_RUNNING,
548 * The checksumming has an optimized version and is considered fast,
549 * so we don't need to offload checksums to workqueues.
551 BTRFS_FS_CSUM_IMPL_FAST,
553 /* Indicate that the discard workqueue can service discards. */
554 BTRFS_FS_DISCARD_RUNNING,
556 /* Indicate that we need to cleanup space cache v1 */
557 BTRFS_FS_CLEANUP_SPACE_CACHE_V1,
561 * Exclusive operations (device replace, resize, device add/remove, balance)
563 enum btrfs_exclusive_operation {
565 BTRFS_EXCLOP_BALANCE,
566 BTRFS_EXCLOP_DEV_ADD,
567 BTRFS_EXCLOP_DEV_REMOVE,
568 BTRFS_EXCLOP_DEV_REPLACE,
570 BTRFS_EXCLOP_SWAP_ACTIVATE,
573 struct btrfs_fs_info {
574 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
576 struct btrfs_root *extent_root;
577 struct btrfs_root *tree_root;
578 struct btrfs_root *chunk_root;
579 struct btrfs_root *dev_root;
580 struct btrfs_root *fs_root;
581 struct btrfs_root *csum_root;
582 struct btrfs_root *quota_root;
583 struct btrfs_root *uuid_root;
584 struct btrfs_root *free_space_root;
585 struct btrfs_root *data_reloc_root;
587 /* the log root tree is a directory of all the other log roots */
588 struct btrfs_root *log_root_tree;
590 spinlock_t fs_roots_radix_lock;
591 struct radix_tree_root fs_roots_radix;
593 /* block group cache stuff */
594 spinlock_t block_group_cache_lock;
595 u64 first_logical_byte;
596 struct rb_root block_group_cache_tree;
598 /* keep track of unallocated space */
599 atomic64_t free_chunk_space;
601 /* Track ranges which are used by log trees blocks/logged data extents */
602 struct extent_io_tree excluded_extents;
604 /* logical->physical extent mapping */
605 struct extent_map_tree mapping_tree;
608 * block reservation for extent, checksum, root tree and
609 * delayed dir index item
611 struct btrfs_block_rsv global_block_rsv;
612 /* block reservation for metadata operations */
613 struct btrfs_block_rsv trans_block_rsv;
614 /* block reservation for chunk tree */
615 struct btrfs_block_rsv chunk_block_rsv;
616 /* block reservation for delayed operations */
617 struct btrfs_block_rsv delayed_block_rsv;
618 /* block reservation for delayed refs */
619 struct btrfs_block_rsv delayed_refs_rsv;
621 struct btrfs_block_rsv empty_block_rsv;
624 u64 last_trans_committed;
625 u64 avg_delayed_ref_runtime;
628 * this is updated to the current trans every time a full commit
629 * is required instead of the faster short fsync log commits
631 u64 last_trans_log_full_commit;
632 unsigned long mount_opt;
634 * Track requests for actions that need to be done during transaction
635 * commit (like for some mount options).
637 unsigned long pending_changes;
638 unsigned long compress_type:4;
639 unsigned int compress_level;
642 * It is a suggestive number, the read side is safe even it gets a
643 * wrong number because we will write out the data into a regular
644 * extent. The write side(mount/remount) is under ->s_umount lock,
645 * so it is also safe.
649 struct btrfs_transaction *running_transaction;
650 wait_queue_head_t transaction_throttle;
651 wait_queue_head_t transaction_wait;
652 wait_queue_head_t transaction_blocked_wait;
653 wait_queue_head_t async_submit_wait;
656 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
657 * when they are updated.
659 * Because we do not clear the flags for ever, so we needn't use
660 * the lock on the read side.
662 * We also needn't use the lock when we mount the fs, because
663 * there is no other task which will update the flag.
665 spinlock_t super_lock;
666 struct btrfs_super_block *super_copy;
667 struct btrfs_super_block *super_for_commit;
668 struct super_block *sb;
669 struct inode *btree_inode;
670 struct mutex tree_log_mutex;
671 struct mutex transaction_kthread_mutex;
672 struct mutex cleaner_mutex;
673 struct mutex chunk_mutex;
676 * this is taken to make sure we don't set block groups ro after
677 * the free space cache has been allocated on them
679 struct mutex ro_block_group_mutex;
681 /* this is used during read/modify/write to make sure
682 * no two ios are trying to mod the same stripe at the same
685 struct btrfs_stripe_hash_table *stripe_hash_table;
688 * this protects the ordered operations list only while we are
689 * processing all of the entries on it. This way we make
690 * sure the commit code doesn't find the list temporarily empty
691 * because another function happens to be doing non-waiting preflush
692 * before jumping into the main commit.
694 struct mutex ordered_operations_mutex;
696 struct rw_semaphore commit_root_sem;
698 struct rw_semaphore cleanup_work_sem;
700 struct rw_semaphore subvol_sem;
702 spinlock_t trans_lock;
704 * the reloc mutex goes with the trans lock, it is taken
705 * during commit to protect us from the relocation code
707 struct mutex reloc_mutex;
709 struct list_head trans_list;
710 struct list_head dead_roots;
711 struct list_head caching_block_groups;
713 spinlock_t delayed_iput_lock;
714 struct list_head delayed_iputs;
715 atomic_t nr_delayed_iputs;
716 wait_queue_head_t delayed_iputs_wait;
718 atomic64_t tree_mod_seq;
720 /* this protects tree_mod_log and tree_mod_seq_list */
721 rwlock_t tree_mod_log_lock;
722 struct rb_root tree_mod_log;
723 struct list_head tree_mod_seq_list;
725 atomic_t async_delalloc_pages;
728 * this is used to protect the following list -- ordered_roots.
730 spinlock_t ordered_root_lock;
733 * all fs/file tree roots in which there are data=ordered extents
734 * pending writeback are added into this list.
736 * these can span multiple transactions and basically include
737 * every dirty data page that isn't from nodatacow
739 struct list_head ordered_roots;
741 struct mutex delalloc_root_mutex;
742 spinlock_t delalloc_root_lock;
743 /* all fs/file tree roots that have delalloc inodes. */
744 struct list_head delalloc_roots;
747 * there is a pool of worker threads for checksumming during writes
748 * and a pool for checksumming after reads. This is because readers
749 * can run with FS locks held, and the writers may be waiting for
750 * those locks. We don't want ordering in the pending list to cause
751 * deadlocks, and so the two are serviced separately.
753 * A third pool does submit_bio to avoid deadlocking with the other
756 struct btrfs_workqueue *workers;
757 struct btrfs_workqueue *delalloc_workers;
758 struct btrfs_workqueue *flush_workers;
759 struct btrfs_workqueue *endio_workers;
760 struct btrfs_workqueue *endio_meta_workers;
761 struct btrfs_workqueue *endio_raid56_workers;
762 struct btrfs_workqueue *rmw_workers;
763 struct btrfs_workqueue *endio_meta_write_workers;
764 struct btrfs_workqueue *endio_write_workers;
765 struct btrfs_workqueue *endio_freespace_worker;
766 struct btrfs_workqueue *caching_workers;
767 struct btrfs_workqueue *readahead_workers;
770 * fixup workers take dirty pages that didn't properly go through
771 * the cow mechanism and make them safe to write. It happens
772 * for the sys_munmap function call path
774 struct btrfs_workqueue *fixup_workers;
775 struct btrfs_workqueue *delayed_workers;
777 struct task_struct *transaction_kthread;
778 struct task_struct *cleaner_kthread;
779 u32 thread_pool_size;
781 struct kobject *space_info_kobj;
782 struct kobject *qgroups_kobj;
786 /* used to keep from writing metadata until there is a nice batch */
787 struct percpu_counter dirty_metadata_bytes;
788 struct percpu_counter delalloc_bytes;
789 struct percpu_counter dio_bytes;
790 s32 dirty_metadata_batch;
793 struct list_head dirty_cowonly_roots;
795 struct btrfs_fs_devices *fs_devices;
798 * The space_info list is effectively read only after initial
799 * setup. It is populated at mount time and cleaned up after
800 * all block groups are removed. RCU is used to protect it.
802 struct list_head space_info;
804 struct btrfs_space_info *data_sinfo;
806 struct reloc_control *reloc_ctl;
808 /* data_alloc_cluster is only used in ssd_spread mode */
809 struct btrfs_free_cluster data_alloc_cluster;
811 /* all metadata allocations go through this cluster */
812 struct btrfs_free_cluster meta_alloc_cluster;
814 /* auto defrag inodes go here */
815 spinlock_t defrag_inodes_lock;
816 struct rb_root defrag_inodes;
817 atomic_t defrag_running;
819 /* Used to protect avail_{data, metadata, system}_alloc_bits */
820 seqlock_t profiles_lock;
822 * these three are in extended format (availability of single
823 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
824 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
826 u64 avail_data_alloc_bits;
827 u64 avail_metadata_alloc_bits;
828 u64 avail_system_alloc_bits;
830 /* restriper state */
831 spinlock_t balance_lock;
832 struct mutex balance_mutex;
833 atomic_t balance_pause_req;
834 atomic_t balance_cancel_req;
835 struct btrfs_balance_control *balance_ctl;
836 wait_queue_head_t balance_wait_q;
838 u32 data_chunk_allocations;
843 /* private scrub information */
844 struct mutex scrub_lock;
845 atomic_t scrubs_running;
846 atomic_t scrub_pause_req;
847 atomic_t scrubs_paused;
848 atomic_t scrub_cancel_req;
849 wait_queue_head_t scrub_pause_wait;
851 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
854 refcount_t scrub_workers_refcnt;
855 struct btrfs_workqueue *scrub_workers;
856 struct btrfs_workqueue *scrub_wr_completion_workers;
857 struct btrfs_workqueue *scrub_parity_workers;
859 struct btrfs_discard_ctl discard_ctl;
861 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
862 u32 check_integrity_print_mask;
864 /* is qgroup tracking in a consistent state? */
867 /* holds configuration and tracking. Protected by qgroup_lock */
868 struct rb_root qgroup_tree;
869 spinlock_t qgroup_lock;
872 * used to avoid frequently calling ulist_alloc()/ulist_free()
873 * when doing qgroup accounting, it must be protected by qgroup_lock.
875 struct ulist *qgroup_ulist;
878 * Protect user change for quota operations. If a transaction is needed,
879 * it must be started before locking this lock.
881 struct mutex qgroup_ioctl_lock;
883 /* list of dirty qgroups to be written at next commit */
884 struct list_head dirty_qgroups;
886 /* used by qgroup for an efficient tree traversal */
889 /* qgroup rescan items */
890 struct mutex qgroup_rescan_lock; /* protects the progress item */
891 struct btrfs_key qgroup_rescan_progress;
892 struct btrfs_workqueue *qgroup_rescan_workers;
893 struct completion qgroup_rescan_completion;
894 struct btrfs_work qgroup_rescan_work;
895 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
897 /* filesystem state */
898 unsigned long fs_state;
900 struct btrfs_delayed_root *delayed_root;
903 spinlock_t reada_lock;
904 struct radix_tree_root reada_tree;
906 /* readahead works cnt */
907 atomic_t reada_works_cnt;
909 /* Extent buffer radix tree */
910 spinlock_t buffer_lock;
911 /* Entries are eb->start / sectorsize */
912 struct radix_tree_root buffer_radix;
914 /* next backup root to be overwritten */
915 int backup_root_index;
917 /* device replace state */
918 struct btrfs_dev_replace dev_replace;
920 struct semaphore uuid_tree_rescan_sem;
922 /* Used to reclaim the metadata space in the background. */
923 struct work_struct async_reclaim_work;
924 struct work_struct async_data_reclaim_work;
926 spinlock_t unused_bgs_lock;
927 struct list_head unused_bgs;
928 struct mutex unused_bg_unpin_mutex;
929 struct mutex delete_unused_bgs_mutex;
931 /* Cached block sizes */
934 /* ilog2 of sectorsize, use to avoid 64bit division */
940 /* Block groups and devices containing active swapfiles. */
941 spinlock_t swapfile_pins_lock;
942 struct rb_root swapfile_pins;
944 struct crypto_shash *csum_shash;
947 * Number of send operations in progress.
948 * Updated while holding fs_info::balance_mutex.
950 int send_in_progress;
952 /* Type of exclusive operation running */
953 unsigned long exclusive_operation;
956 * Zone size > 0 when in ZONED mode, otherwise it's used for a check
957 * if the mode is enabled
964 /* Max size to emit ZONE_APPEND write command */
965 u64 max_zone_append_size;
967 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
968 spinlock_t ref_verify_lock;
969 struct rb_root block_tree;
972 #ifdef CONFIG_BTRFS_DEBUG
973 struct kobject *debug_kobj;
974 struct kobject *discard_debug_kobj;
975 struct list_head allocated_roots;
977 spinlock_t eb_leak_lock;
978 struct list_head allocated_ebs;
982 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
984 return sb->s_fs_info;
988 * The state of btrfs root
992 * btrfs_record_root_in_trans is a multi-step process, and it can race
993 * with the balancing code. But the race is very small, and only the
994 * first time the root is added to each transaction. So IN_TRANS_SETUP
995 * is used to tell us when more checks are required
997 BTRFS_ROOT_IN_TRANS_SETUP,
1000 * Set if tree blocks of this root can be shared by other roots.
1001 * Only subvolume trees and their reloc trees have this bit set.
1002 * Conflicts with TRACK_DIRTY bit.
1004 * This affects two things:
1006 * - How balance works
1007 * For shareable roots, we need to use reloc tree and do path
1008 * replacement for balance, and need various pre/post hooks for
1009 * snapshot creation to handle them.
1011 * While for non-shareable trees, we just simply do a tree search
1014 * - How dirty roots are tracked
1015 * For shareable roots, btrfs_record_root_in_trans() is needed to
1016 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1017 * don't need to set this manually.
1019 BTRFS_ROOT_SHAREABLE,
1020 BTRFS_ROOT_TRACK_DIRTY,
1021 BTRFS_ROOT_IN_RADIX,
1022 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1023 BTRFS_ROOT_DEFRAG_RUNNING,
1024 BTRFS_ROOT_FORCE_COW,
1025 BTRFS_ROOT_MULTI_LOG_TASKS,
1027 BTRFS_ROOT_DELETING,
1030 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1032 * Set for the subvolume tree owning the reloc tree.
1034 BTRFS_ROOT_DEAD_RELOC_TREE,
1035 /* Mark dead root stored on device whose cleanup needs to be resumed */
1036 BTRFS_ROOT_DEAD_TREE,
1037 /* The root has a log tree. Used for subvolume roots and the tree root. */
1038 BTRFS_ROOT_HAS_LOG_TREE,
1039 /* Qgroup flushing is in progress */
1040 BTRFS_ROOT_QGROUP_FLUSHING,
1044 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1045 * code. For detail check comment in fs/btrfs/qgroup.c.
1047 struct btrfs_qgroup_swapped_blocks {
1049 /* RM_EMPTY_ROOT() of above blocks[] */
1051 struct rb_root blocks[BTRFS_MAX_LEVEL];
1055 * in ram representation of the tree. extent_root is used for all allocations
1056 * and for the extent tree extent_root root.
1059 struct extent_buffer *node;
1061 struct extent_buffer *commit_root;
1062 struct btrfs_root *log_root;
1063 struct btrfs_root *reloc_root;
1065 unsigned long state;
1066 struct btrfs_root_item root_item;
1067 struct btrfs_key root_key;
1068 struct btrfs_fs_info *fs_info;
1069 struct extent_io_tree dirty_log_pages;
1071 struct mutex objectid_mutex;
1073 spinlock_t accounting_lock;
1074 struct btrfs_block_rsv *block_rsv;
1076 struct mutex log_mutex;
1077 wait_queue_head_t log_writer_wait;
1078 wait_queue_head_t log_commit_wait[2];
1079 struct list_head log_ctxs[2];
1080 /* Used only for log trees of subvolumes, not for the log root tree */
1081 atomic_t log_writers;
1082 atomic_t log_commit[2];
1083 /* Used only for log trees of subvolumes, not for the log root tree */
1086 /* No matter the commit succeeds or not*/
1087 int log_transid_committed;
1088 /* Just be updated when the commit succeeds. */
1089 int last_log_commit;
1090 pid_t log_start_pid;
1096 u64 highest_objectid;
1098 struct btrfs_key defrag_progress;
1099 struct btrfs_key defrag_max;
1101 /* The dirty list is only used by non-shareable roots */
1102 struct list_head dirty_list;
1104 struct list_head root_list;
1106 spinlock_t log_extents_lock[2];
1107 struct list_head logged_list[2];
1109 int orphan_cleanup_state;
1111 spinlock_t inode_lock;
1112 /* red-black tree that keeps track of in-memory inodes */
1113 struct rb_root inode_tree;
1116 * radix tree that keeps track of delayed nodes of every inode,
1117 * protected by inode_lock
1119 struct radix_tree_root delayed_nodes_tree;
1121 * right now this just gets used so that a root has its own devid
1122 * for stat. It may be used for more later
1126 spinlock_t root_item_lock;
1129 struct mutex delalloc_mutex;
1130 spinlock_t delalloc_lock;
1132 * all of the inodes that have delalloc bytes. It is possible for
1133 * this list to be empty even when there is still dirty data=ordered
1134 * extents waiting to finish IO.
1136 struct list_head delalloc_inodes;
1137 struct list_head delalloc_root;
1138 u64 nr_delalloc_inodes;
1140 struct mutex ordered_extent_mutex;
1142 * this is used by the balancing code to wait for all the pending
1145 spinlock_t ordered_extent_lock;
1148 * all of the data=ordered extents pending writeback
1149 * these can span multiple transactions and basically include
1150 * every dirty data page that isn't from nodatacow
1152 struct list_head ordered_extents;
1153 struct list_head ordered_root;
1154 u64 nr_ordered_extents;
1157 * Not empty if this subvolume root has gone through tree block swap
1160 * Will be used by reloc_control::dirty_subvol_roots.
1162 struct list_head reloc_dirty_list;
1165 * Number of currently running SEND ioctls to prevent
1166 * manipulation with the read-only status via SUBVOL_SETFLAGS
1168 int send_in_progress;
1170 * Number of currently running deduplication operations that have a
1171 * destination inode belonging to this root. Protected by the lock
1174 int dedupe_in_progress;
1175 /* For exclusion of snapshot creation and nocow writes */
1176 struct btrfs_drew_lock snapshot_lock;
1178 atomic_t snapshot_force_cow;
1180 /* For qgroup metadata reserved space */
1181 spinlock_t qgroup_meta_rsv_lock;
1182 u64 qgroup_meta_rsv_pertrans;
1183 u64 qgroup_meta_rsv_prealloc;
1184 wait_queue_head_t qgroup_flush_wait;
1186 /* Number of active swapfiles */
1187 atomic_t nr_swapfiles;
1189 /* Record pairs of swapped blocks for qgroup */
1190 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1192 /* Used only by log trees, when logging csum items */
1193 struct extent_io_tree log_csum_range;
1195 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1199 #ifdef CONFIG_BTRFS_DEBUG
1200 struct list_head leak_list;
1205 * Structure that conveys information about an extent that is going to replace
1206 * all the extents in a file range.
1208 struct btrfs_replace_extent_info {
1214 /* Pointer to a file extent item of type regular or prealloc. */
1217 * Set to true when attempting to replace a file range with a new extent
1218 * described by this structure, set to false when attempting to clone an
1219 * existing extent into a file range.
1222 /* Meaningful only if is_new_extent is true. */
1223 int qgroup_reserved;
1225 * Meaningful only if is_new_extent is true.
1226 * Used to track how many extent items we have already inserted in a
1227 * subvolume tree that refer to the extent described by this structure,
1228 * so that we know when to create a new delayed ref or update an existing
1234 /* Arguments for btrfs_drop_extents() */
1235 struct btrfs_drop_extents_args {
1236 /* Input parameters */
1239 * If NULL, btrfs_drop_extents() will allocate and free its own path.
1240 * If 'replace_extent' is true, this must not be NULL. Also the path
1241 * is always released except if 'replace_extent' is true and
1242 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case
1243 * the path is kept locked.
1245 struct btrfs_path *path;
1246 /* Start offset of the range to drop extents from */
1248 /* End (exclusive, last byte + 1) of the range to drop extents from */
1250 /* If true drop all the extent maps in the range */
1253 * If true it means we want to insert a new extent after dropping all
1254 * the extents in the range. If this is true, the 'extent_item_size'
1255 * parameter must be set as well and the 'extent_inserted' field will
1256 * be set to true by btrfs_drop_extents() if it could insert the new
1258 * Note: when this is set to true the path must not be NULL.
1260 bool replace_extent;
1262 * Used if 'replace_extent' is true. Size of the file extent item to
1263 * insert after dropping all existing extents in the range
1265 u32 extent_item_size;
1267 /* Output parameters */
1270 * Set to the minimum between the input parameter 'end' and the end
1271 * (exclusive, last byte + 1) of the last dropped extent. This is always
1272 * set even if btrfs_drop_extents() returns an error.
1276 * The number of allocated bytes found in the range. This can be smaller
1277 * than the range's length when there are holes in the range.
1281 * Only set if 'replace_extent' is true. Set to true if we were able
1282 * to insert a replacement extent after dropping all extents in the
1283 * range, otherwise set to false by btrfs_drop_extents().
1284 * Also, if btrfs_drop_extents() has set this to true it means it
1285 * returned with the path locked, otherwise if it has set this to
1286 * false it has returned with the path released.
1288 bool extent_inserted;
1291 struct btrfs_file_private {
1296 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1299 return info->nodesize - sizeof(struct btrfs_header);
1302 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1304 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1306 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1309 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1311 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1314 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1315 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1316 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1318 return BTRFS_MAX_ITEM_SIZE(info) -
1319 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1322 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1324 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1328 * Flags for mount options.
1330 * Note: don't forget to add new options to btrfs_show_options()
1332 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1333 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1334 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1335 #define BTRFS_MOUNT_SSD (1 << 3)
1336 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1337 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1338 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1339 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1340 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1341 #define BTRFS_MOUNT_NOSSD (1 << 9)
1342 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1343 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1344 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1345 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1346 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1347 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1348 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1349 /* bit 17 is free */
1350 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1351 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1352 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1353 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1354 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1355 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1356 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1357 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1358 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1359 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1360 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1361 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1362 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30)
1363 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31)
1365 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1366 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1368 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1369 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1370 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1371 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1374 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1376 if (!btrfs_test_opt(fs_info, opt)) \
1377 btrfs_info(fs_info, fmt, ##args); \
1378 btrfs_set_opt(fs_info->mount_opt, opt); \
1381 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1383 if (btrfs_test_opt(fs_info, opt)) \
1384 btrfs_info(fs_info, fmt, ##args); \
1385 btrfs_clear_opt(fs_info->mount_opt, opt); \
1389 * Requests for changes that need to be done during transaction commit.
1391 * Internal mount options that are used for special handling of the real
1392 * mount options (eg. cannot be set during remount and have to be set during
1393 * transaction commit)
1396 #define BTRFS_PENDING_COMMIT (0)
1398 #define btrfs_test_pending(info, opt) \
1399 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1400 #define btrfs_set_pending(info, opt) \
1401 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1402 #define btrfs_clear_pending(info, opt) \
1403 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1406 * Helpers for setting pending mount option changes.
1408 * Expects corresponding macros
1409 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1411 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1413 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1414 btrfs_info((info), fmt, ##args); \
1415 btrfs_set_pending((info), SET_##opt); \
1416 btrfs_clear_pending((info), CLEAR_##opt); \
1420 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1422 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1423 btrfs_info((info), fmt, ##args); \
1424 btrfs_set_pending((info), CLEAR_##opt); \
1425 btrfs_clear_pending((info), SET_##opt); \
1432 #define BTRFS_INODE_NODATASUM (1 << 0)
1433 #define BTRFS_INODE_NODATACOW (1 << 1)
1434 #define BTRFS_INODE_READONLY (1 << 2)
1435 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1436 #define BTRFS_INODE_PREALLOC (1 << 4)
1437 #define BTRFS_INODE_SYNC (1 << 5)
1438 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1439 #define BTRFS_INODE_APPEND (1 << 7)
1440 #define BTRFS_INODE_NODUMP (1 << 8)
1441 #define BTRFS_INODE_NOATIME (1 << 9)
1442 #define BTRFS_INODE_DIRSYNC (1 << 10)
1443 #define BTRFS_INODE_COMPRESS (1 << 11)
1445 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1447 #define BTRFS_INODE_FLAG_MASK \
1448 (BTRFS_INODE_NODATASUM | \
1449 BTRFS_INODE_NODATACOW | \
1450 BTRFS_INODE_READONLY | \
1451 BTRFS_INODE_NOCOMPRESS | \
1452 BTRFS_INODE_PREALLOC | \
1453 BTRFS_INODE_SYNC | \
1454 BTRFS_INODE_IMMUTABLE | \
1455 BTRFS_INODE_APPEND | \
1456 BTRFS_INODE_NODUMP | \
1457 BTRFS_INODE_NOATIME | \
1458 BTRFS_INODE_DIRSYNC | \
1459 BTRFS_INODE_COMPRESS | \
1460 BTRFS_INODE_ROOT_ITEM_INIT)
1462 struct btrfs_map_token {
1463 struct extent_buffer *eb;
1465 unsigned long offset;
1468 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1469 ((bytes) >> (fs_info)->sectorsize_bits)
1471 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1472 struct extent_buffer *eb)
1475 token->kaddr = page_address(eb->pages[0]);
1479 /* some macros to generate set/get functions for the struct fields. This
1480 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1483 #define le8_to_cpu(v) (v)
1484 #define cpu_to_le8(v) (v)
1487 static inline u8 get_unaligned_le8(const void *p)
1492 static inline void put_unaligned_le8(u8 val, void *p)
1497 #define read_eb_member(eb, ptr, type, member, result) (\
1498 read_extent_buffer(eb, (char *)(result), \
1499 ((unsigned long)(ptr)) + \
1500 offsetof(type, member), \
1501 sizeof(((type *)0)->member)))
1503 #define write_eb_member(eb, ptr, type, member, result) (\
1504 write_extent_buffer(eb, (char *)(result), \
1505 ((unsigned long)(ptr)) + \
1506 offsetof(type, member), \
1507 sizeof(((type *)0)->member)))
1509 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1510 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1511 const void *ptr, unsigned long off); \
1512 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1513 const void *ptr, unsigned long off, \
1515 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1516 const void *ptr, unsigned long off); \
1517 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1518 unsigned long off, u##bits val);
1520 DECLARE_BTRFS_SETGET_BITS(8)
1521 DECLARE_BTRFS_SETGET_BITS(16)
1522 DECLARE_BTRFS_SETGET_BITS(32)
1523 DECLARE_BTRFS_SETGET_BITS(64)
1525 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1526 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1529 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1530 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1532 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1535 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1536 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1538 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1541 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1542 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1544 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1545 type *s, u##bits val) \
1547 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1548 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1551 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1552 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1554 const type *p = page_address(eb->pages[0]) + \
1555 offset_in_page(eb->start); \
1556 return get_unaligned_le##bits(&p->member); \
1558 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1561 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \
1562 put_unaligned_le##bits(val, &p->member); \
1565 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1566 static inline u##bits btrfs_##name(const type *s) \
1568 return get_unaligned_le##bits(&s->member); \
1570 static inline void btrfs_set_##name(type *s, u##bits val) \
1572 put_unaligned_le##bits(val, &s->member); \
1575 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1576 struct btrfs_dev_item *s)
1578 BUILD_BUG_ON(sizeof(u64) !=
1579 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1580 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1583 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1584 struct btrfs_dev_item *s,
1587 BUILD_BUG_ON(sizeof(u64) !=
1588 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1589 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1590 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1594 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1595 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1596 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1597 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1598 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1600 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1601 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1602 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1603 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1604 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1605 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1607 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1608 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1610 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1612 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1614 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1616 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1618 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1619 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1621 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1623 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1625 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1628 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1630 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1633 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1635 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1638 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1639 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1640 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1641 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1642 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1643 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1644 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1645 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1646 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1647 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1648 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1650 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1652 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1656 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1659 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1661 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1665 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1668 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1670 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1671 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1673 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1676 unsigned long offset = (unsigned long)c;
1677 offset += offsetof(struct btrfs_chunk, stripe);
1678 offset += nr * sizeof(struct btrfs_stripe);
1679 return (struct btrfs_stripe *)offset;
1682 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1684 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1687 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1688 struct btrfs_chunk *c, int nr)
1690 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1693 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1694 struct btrfs_chunk *c, int nr)
1696 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1699 /* struct btrfs_block_group_item */
1700 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1702 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1704 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1705 struct btrfs_block_group_item, chunk_objectid, 64);
1707 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1708 struct btrfs_block_group_item, chunk_objectid, 64);
1709 BTRFS_SETGET_FUNCS(block_group_flags,
1710 struct btrfs_block_group_item, flags, 64);
1711 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1712 struct btrfs_block_group_item, flags, 64);
1714 /* struct btrfs_free_space_info */
1715 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1717 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1719 /* struct btrfs_inode_ref */
1720 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1721 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1723 /* struct btrfs_inode_extref */
1724 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1725 parent_objectid, 64);
1726 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1728 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1730 /* struct btrfs_inode_item */
1731 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1732 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1733 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1734 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1735 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1736 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1737 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1738 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1739 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1740 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1741 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1742 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1743 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1754 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1759 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1760 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1761 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1762 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1763 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1765 /* struct btrfs_dev_extent */
1766 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1768 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1769 chunk_objectid, 64);
1770 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1772 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1773 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1774 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1776 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1778 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1780 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1781 struct btrfs_tree_block_info *item,
1782 struct btrfs_disk_key *key)
1784 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1787 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1788 struct btrfs_tree_block_info *item,
1789 struct btrfs_disk_key *key)
1791 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1794 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1796 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1798 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1800 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1803 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1806 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1808 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1811 static inline u32 btrfs_extent_inline_ref_size(int type)
1813 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1814 type == BTRFS_SHARED_BLOCK_REF_KEY)
1815 return sizeof(struct btrfs_extent_inline_ref);
1816 if (type == BTRFS_SHARED_DATA_REF_KEY)
1817 return sizeof(struct btrfs_shared_data_ref) +
1818 sizeof(struct btrfs_extent_inline_ref);
1819 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1820 return sizeof(struct btrfs_extent_data_ref) +
1821 offsetof(struct btrfs_extent_inline_ref, offset);
1825 /* struct btrfs_node */
1826 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1827 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1828 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1830 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1833 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1836 ptr = offsetof(struct btrfs_node, ptrs) +
1837 sizeof(struct btrfs_key_ptr) * nr;
1838 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1841 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1845 ptr = offsetof(struct btrfs_node, ptrs) +
1846 sizeof(struct btrfs_key_ptr) * nr;
1847 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1850 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1853 ptr = offsetof(struct btrfs_node, ptrs) +
1854 sizeof(struct btrfs_key_ptr) * nr;
1855 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1858 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1862 ptr = offsetof(struct btrfs_node, ptrs) +
1863 sizeof(struct btrfs_key_ptr) * nr;
1864 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1867 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1869 return offsetof(struct btrfs_node, ptrs) +
1870 sizeof(struct btrfs_key_ptr) * nr;
1873 void btrfs_node_key(const struct extent_buffer *eb,
1874 struct btrfs_disk_key *disk_key, int nr);
1876 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1877 struct btrfs_disk_key *disk_key, int nr)
1880 ptr = btrfs_node_key_ptr_offset(nr);
1881 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1882 struct btrfs_key_ptr, key, disk_key);
1885 /* struct btrfs_item */
1886 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1887 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1888 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1889 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1891 static inline unsigned long btrfs_item_nr_offset(int nr)
1893 return offsetof(struct btrfs_leaf, items) +
1894 sizeof(struct btrfs_item) * nr;
1897 static inline struct btrfs_item *btrfs_item_nr(int nr)
1899 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1902 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1903 struct btrfs_item *item)
1905 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1908 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1910 return btrfs_item_end(eb, btrfs_item_nr(nr));
1913 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1915 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1918 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1920 return btrfs_item_size(eb, btrfs_item_nr(nr));
1923 static inline void btrfs_item_key(const struct extent_buffer *eb,
1924 struct btrfs_disk_key *disk_key, int nr)
1926 struct btrfs_item *item = btrfs_item_nr(nr);
1927 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1930 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1931 struct btrfs_disk_key *disk_key, int nr)
1933 struct btrfs_item *item = btrfs_item_nr(nr);
1934 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1937 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1940 * struct btrfs_root_ref
1942 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1943 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1944 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1946 /* struct btrfs_dir_item */
1947 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1948 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1949 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1950 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1951 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1952 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1954 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1956 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1959 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1960 const struct btrfs_dir_item *item,
1961 struct btrfs_disk_key *key)
1963 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1966 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1967 struct btrfs_dir_item *item,
1968 const struct btrfs_disk_key *key)
1970 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1973 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1975 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1977 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1980 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1981 const struct btrfs_free_space_header *h,
1982 struct btrfs_disk_key *key)
1984 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1987 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1988 struct btrfs_free_space_header *h,
1989 const struct btrfs_disk_key *key)
1991 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1994 /* struct btrfs_disk_key */
1995 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1997 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1998 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2000 #ifdef __LITTLE_ENDIAN
2003 * Optimized helpers for little-endian architectures where CPU and on-disk
2004 * structures have the same endianness and we can skip conversions.
2007 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
2008 const struct btrfs_disk_key *disk_key)
2010 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
2013 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
2014 const struct btrfs_key *cpu_key)
2016 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
2019 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2020 struct btrfs_key *cpu_key, int nr)
2022 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2024 btrfs_node_key(eb, disk_key, nr);
2027 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2028 struct btrfs_key *cpu_key, int nr)
2030 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2032 btrfs_item_key(eb, disk_key, nr);
2035 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2036 const struct btrfs_dir_item *item,
2037 struct btrfs_key *cpu_key)
2039 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2041 btrfs_dir_item_key(eb, item, disk_key);
2046 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2047 const struct btrfs_disk_key *disk)
2049 cpu->offset = le64_to_cpu(disk->offset);
2050 cpu->type = disk->type;
2051 cpu->objectid = le64_to_cpu(disk->objectid);
2054 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2055 const struct btrfs_key *cpu)
2057 disk->offset = cpu_to_le64(cpu->offset);
2058 disk->type = cpu->type;
2059 disk->objectid = cpu_to_le64(cpu->objectid);
2062 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2063 struct btrfs_key *key, int nr)
2065 struct btrfs_disk_key disk_key;
2066 btrfs_node_key(eb, &disk_key, nr);
2067 btrfs_disk_key_to_cpu(key, &disk_key);
2070 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2071 struct btrfs_key *key, int nr)
2073 struct btrfs_disk_key disk_key;
2074 btrfs_item_key(eb, &disk_key, nr);
2075 btrfs_disk_key_to_cpu(key, &disk_key);
2078 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2079 const struct btrfs_dir_item *item,
2080 struct btrfs_key *key)
2082 struct btrfs_disk_key disk_key;
2083 btrfs_dir_item_key(eb, item, &disk_key);
2084 btrfs_disk_key_to_cpu(key, &disk_key);
2089 /* struct btrfs_header */
2090 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2091 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2093 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2094 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2095 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2096 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2097 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2099 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2100 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2102 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2104 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2106 return (btrfs_header_flags(eb) & flag) == flag;
2109 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2111 u64 flags = btrfs_header_flags(eb);
2112 btrfs_set_header_flags(eb, flags | flag);
2115 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2117 u64 flags = btrfs_header_flags(eb);
2118 btrfs_set_header_flags(eb, flags & ~flag);
2121 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2123 u64 flags = btrfs_header_flags(eb);
2124 return flags >> BTRFS_BACKREF_REV_SHIFT;
2127 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2130 u64 flags = btrfs_header_flags(eb);
2131 flags &= ~BTRFS_BACKREF_REV_MASK;
2132 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2133 btrfs_set_header_flags(eb, flags);
2136 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2138 return btrfs_header_level(eb) == 0;
2141 /* struct btrfs_root_item */
2142 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2144 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2145 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2146 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2148 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2150 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2151 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
2152 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2153 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2154 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2155 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2156 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2157 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2158 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2160 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2162 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2164 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2166 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2168 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2171 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2173 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2176 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2178 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2181 /* struct btrfs_root_backup */
2182 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2184 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2186 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2187 tree_root_level, 8);
2189 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2191 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2192 chunk_root_gen, 64);
2193 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2194 chunk_root_level, 8);
2196 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2198 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2199 extent_root_gen, 64);
2200 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2201 extent_root_level, 8);
2203 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2205 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2207 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2210 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2212 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2214 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2217 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2219 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2221 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2222 csum_root_level, 8);
2223 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2225 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2227 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2230 /* struct btrfs_balance_item */
2231 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2233 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2234 const struct btrfs_balance_item *bi,
2235 struct btrfs_disk_balance_args *ba)
2237 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2240 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2241 struct btrfs_balance_item *bi,
2242 const struct btrfs_disk_balance_args *ba)
2244 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2247 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2248 const struct btrfs_balance_item *bi,
2249 struct btrfs_disk_balance_args *ba)
2251 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2254 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2255 struct btrfs_balance_item *bi,
2256 const struct btrfs_disk_balance_args *ba)
2258 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2261 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2262 const struct btrfs_balance_item *bi,
2263 struct btrfs_disk_balance_args *ba)
2265 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2268 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2269 struct btrfs_balance_item *bi,
2270 const struct btrfs_disk_balance_args *ba)
2272 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2276 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2277 const struct btrfs_disk_balance_args *disk)
2279 memset(cpu, 0, sizeof(*cpu));
2281 cpu->profiles = le64_to_cpu(disk->profiles);
2282 cpu->usage = le64_to_cpu(disk->usage);
2283 cpu->devid = le64_to_cpu(disk->devid);
2284 cpu->pstart = le64_to_cpu(disk->pstart);
2285 cpu->pend = le64_to_cpu(disk->pend);
2286 cpu->vstart = le64_to_cpu(disk->vstart);
2287 cpu->vend = le64_to_cpu(disk->vend);
2288 cpu->target = le64_to_cpu(disk->target);
2289 cpu->flags = le64_to_cpu(disk->flags);
2290 cpu->limit = le64_to_cpu(disk->limit);
2291 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2292 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2296 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2297 const struct btrfs_balance_args *cpu)
2299 memset(disk, 0, sizeof(*disk));
2301 disk->profiles = cpu_to_le64(cpu->profiles);
2302 disk->usage = cpu_to_le64(cpu->usage);
2303 disk->devid = cpu_to_le64(cpu->devid);
2304 disk->pstart = cpu_to_le64(cpu->pstart);
2305 disk->pend = cpu_to_le64(cpu->pend);
2306 disk->vstart = cpu_to_le64(cpu->vstart);
2307 disk->vend = cpu_to_le64(cpu->vend);
2308 disk->target = cpu_to_le64(cpu->target);
2309 disk->flags = cpu_to_le64(cpu->flags);
2310 disk->limit = cpu_to_le64(cpu->limit);
2311 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2312 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2315 /* struct btrfs_super_block */
2316 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2317 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2318 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2320 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2321 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2322 struct btrfs_super_block, sys_chunk_array_size, 32);
2323 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2324 struct btrfs_super_block, chunk_root_generation, 64);
2325 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2327 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2329 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2330 chunk_root_level, 8);
2331 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2333 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2334 log_root_transid, 64);
2335 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2337 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2339 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2341 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2343 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2345 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2347 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2348 root_dir_objectid, 64);
2349 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2351 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2353 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2354 compat_ro_flags, 64);
2355 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2356 incompat_flags, 64);
2357 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2359 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2360 cache_generation, 64);
2361 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2362 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2363 uuid_tree_generation, 64);
2365 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2366 const char *btrfs_super_csum_name(u16 csum_type);
2367 const char *btrfs_super_csum_driver(u16 csum_type);
2368 size_t __attribute_const__ btrfs_get_num_csums(void);
2372 * The leaf data grows from end-to-front in the node.
2373 * this returns the address of the start of the last item,
2374 * which is the stop of the leaf data stack
2376 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2378 u32 nr = btrfs_header_nritems(leaf);
2381 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2382 return btrfs_item_offset_nr(leaf, nr - 1);
2385 /* struct btrfs_file_extent_item */
2386 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2388 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2389 struct btrfs_file_extent_item, disk_bytenr, 64);
2390 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2391 struct btrfs_file_extent_item, offset, 64);
2392 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2393 struct btrfs_file_extent_item, generation, 64);
2394 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2395 struct btrfs_file_extent_item, num_bytes, 64);
2396 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2397 struct btrfs_file_extent_item, ram_bytes, 64);
2398 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2399 struct btrfs_file_extent_item, disk_num_bytes, 64);
2400 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2401 struct btrfs_file_extent_item, compression, 8);
2403 static inline unsigned long
2404 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2406 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2409 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2411 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2414 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
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_qgroup_status_item */
2447 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2449 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2451 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2453 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2456 /* btrfs_qgroup_info_item */
2457 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2459 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2460 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2462 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2463 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2466 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2467 struct btrfs_qgroup_info_item, generation, 64);
2468 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2470 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2471 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2472 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2474 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2475 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2477 /* btrfs_qgroup_limit_item */
2478 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2480 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2482 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2484 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2486 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2489 /* btrfs_dev_replace_item */
2490 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2491 struct btrfs_dev_replace_item, src_devid, 64);
2492 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2493 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2495 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2497 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2499 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2501 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2502 num_write_errors, 64);
2503 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2504 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2506 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2508 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2511 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2512 struct btrfs_dev_replace_item, src_devid, 64);
2513 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2514 struct btrfs_dev_replace_item,
2515 cont_reading_from_srcdev_mode, 64);
2516 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2517 struct btrfs_dev_replace_item, replace_state, 64);
2518 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2519 struct btrfs_dev_replace_item, time_started, 64);
2520 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2521 struct btrfs_dev_replace_item, time_stopped, 64);
2522 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2523 struct btrfs_dev_replace_item, num_write_errors, 64);
2524 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2525 struct btrfs_dev_replace_item,
2526 num_uncorrectable_read_errors, 64);
2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2528 struct btrfs_dev_replace_item, cursor_left, 64);
2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2530 struct btrfs_dev_replace_item, cursor_right, 64);
2532 /* helper function to cast into the data area of the leaf. */
2533 #define btrfs_item_ptr(leaf, slot, type) \
2534 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2535 btrfs_item_offset_nr(leaf, slot)))
2537 #define btrfs_item_ptr_offset(leaf, slot) \
2538 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2539 btrfs_item_offset_nr(leaf, slot)))
2541 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2543 return crc32c(crc, address, length);
2546 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2548 put_unaligned_le32(~crc, result);
2551 static inline u64 btrfs_name_hash(const char *name, int len)
2553 return crc32c((u32)~1, name, len);
2557 * Figure the key offset of an extended inode ref
2559 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2562 return (u64) crc32c(parent_objectid, name, len);
2565 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2567 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2572 enum btrfs_inline_ref_type {
2573 BTRFS_REF_TYPE_INVALID,
2574 BTRFS_REF_TYPE_BLOCK,
2575 BTRFS_REF_TYPE_DATA,
2579 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2580 struct btrfs_extent_inline_ref *iref,
2581 enum btrfs_inline_ref_type is_data);
2582 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2585 * Take the number of bytes to be checksummmed and figure out how many leaves
2586 * it would require to store the csums for that many bytes.
2588 static inline u64 btrfs_csum_bytes_to_leaves(
2589 const struct btrfs_fs_info *fs_info, u64 csum_bytes)
2591 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
2593 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
2597 * Use this if we would be adding new items, as we could split nodes as we cow
2600 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2603 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2607 * Doing a truncate or a modification won't result in new nodes or leaves, just
2608 * what we need for COW.
2610 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2613 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2616 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2617 u64 start, u64 num_bytes);
2618 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2619 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2620 unsigned long count);
2621 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2622 struct btrfs_delayed_ref_root *delayed_refs,
2623 struct btrfs_delayed_ref_head *head);
2624 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2625 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2626 struct btrfs_fs_info *fs_info, u64 bytenr,
2627 u64 offset, int metadata, u64 *refs, u64 *flags);
2628 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2630 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2631 u64 bytenr, u64 num_bytes);
2632 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2633 int btrfs_cross_ref_exist(struct btrfs_root *root,
2634 u64 objectid, u64 offset, u64 bytenr, bool strict);
2635 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2636 struct btrfs_root *root,
2637 u64 parent, u64 root_objectid,
2638 const struct btrfs_disk_key *key,
2639 int level, u64 hint,
2641 enum btrfs_lock_nesting nest);
2642 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2643 struct btrfs_root *root,
2644 struct extent_buffer *buf,
2645 u64 parent, int last_ref);
2646 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2647 struct btrfs_root *root, u64 owner,
2648 u64 offset, u64 ram_bytes,
2649 struct btrfs_key *ins);
2650 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2651 u64 root_objectid, u64 owner, u64 offset,
2652 struct btrfs_key *ins);
2653 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2654 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2655 struct btrfs_key *ins, int is_data, int delalloc);
2656 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2657 struct extent_buffer *buf, int full_backref);
2658 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2659 struct extent_buffer *buf, int full_backref);
2660 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2661 struct extent_buffer *eb, u64 flags,
2662 int level, int is_data);
2663 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2665 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2666 u64 start, u64 len, int delalloc);
2667 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2669 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2670 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2671 struct btrfs_ref *generic_ref);
2673 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2674 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2677 * Different levels for to flush space when doing space reservations.
2679 * The higher the level, the more methods we try to reclaim space.
2681 enum btrfs_reserve_flush_enum {
2682 /* If we are in the transaction, we can't flush anything.*/
2683 BTRFS_RESERVE_NO_FLUSH,
2687 * - Running delayed inode items
2688 * - Allocating a new chunk
2690 BTRFS_RESERVE_FLUSH_LIMIT,
2694 * - Running delayed inode items
2695 * - Running delayed refs
2696 * - Running delalloc and waiting for ordered extents
2697 * - Allocating a new chunk
2699 BTRFS_RESERVE_FLUSH_EVICT,
2702 * Flush space by above mentioned methods and by:
2703 * - Running delayed iputs
2704 * - Commiting transaction
2706 * Can be interruped by fatal signal.
2708 BTRFS_RESERVE_FLUSH_DATA,
2709 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2710 BTRFS_RESERVE_FLUSH_ALL,
2713 * Pretty much the same as FLUSH_ALL, but can also steal space from
2716 * Can be interruped by fatal signal.
2718 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2721 enum btrfs_flush_state {
2722 FLUSH_DELAYED_ITEMS_NR = 1,
2723 FLUSH_DELAYED_ITEMS = 2,
2724 FLUSH_DELAYED_REFS_NR = 3,
2725 FLUSH_DELAYED_REFS = 4,
2727 FLUSH_DELALLOC_WAIT = 6,
2729 ALLOC_CHUNK_FORCE = 8,
2730 RUN_DELAYED_IPUTS = 9,
2734 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2735 struct btrfs_block_rsv *rsv,
2736 int nitems, bool use_global_rsv);
2737 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2738 struct btrfs_block_rsv *rsv);
2739 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2741 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2742 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2743 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2744 u64 start, u64 end);
2745 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2746 u64 num_bytes, u64 *actual_bytes);
2747 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2749 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2750 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2751 struct btrfs_fs_info *fs_info);
2752 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2753 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2754 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2757 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2759 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2760 int btrfs_previous_item(struct btrfs_root *root,
2761 struct btrfs_path *path, u64 min_objectid,
2763 int btrfs_previous_extent_item(struct btrfs_root *root,
2764 struct btrfs_path *path, u64 min_objectid);
2765 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2766 struct btrfs_path *path,
2767 const struct btrfs_key *new_key);
2768 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2769 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2770 struct btrfs_key *key, int lowest_level,
2772 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2773 struct btrfs_path *path,
2775 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2778 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2779 struct btrfs_root *root, struct extent_buffer *buf,
2780 struct extent_buffer *parent, int parent_slot,
2781 struct extent_buffer **cow_ret,
2782 enum btrfs_lock_nesting nest);
2783 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2784 struct btrfs_root *root,
2785 struct extent_buffer *buf,
2786 struct extent_buffer **cow_ret, u64 new_root_objectid);
2787 int btrfs_block_can_be_shared(struct btrfs_root *root,
2788 struct extent_buffer *buf);
2789 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2790 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2791 int btrfs_split_item(struct btrfs_trans_handle *trans,
2792 struct btrfs_root *root,
2793 struct btrfs_path *path,
2794 const struct btrfs_key *new_key,
2795 unsigned long split_offset);
2796 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2797 struct btrfs_root *root,
2798 struct btrfs_path *path,
2799 const struct btrfs_key *new_key);
2800 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2801 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2802 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2803 const struct btrfs_key *key, struct btrfs_path *p,
2804 int ins_len, int cow);
2805 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2806 struct btrfs_path *p, u64 time_seq);
2807 int btrfs_search_slot_for_read(struct btrfs_root *root,
2808 const struct btrfs_key *key,
2809 struct btrfs_path *p, int find_higher,
2811 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2812 struct btrfs_root *root, struct extent_buffer *parent,
2813 int start_slot, u64 *last_ret,
2814 struct btrfs_key *progress);
2815 void btrfs_release_path(struct btrfs_path *p);
2816 struct btrfs_path *btrfs_alloc_path(void);
2817 void btrfs_free_path(struct btrfs_path *p);
2819 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2820 struct btrfs_path *path, int slot, int nr);
2821 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2822 struct btrfs_root *root,
2823 struct btrfs_path *path)
2825 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2828 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2829 const struct btrfs_key *cpu_key, u32 *data_size,
2831 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2832 const struct btrfs_key *key, void *data, u32 data_size);
2833 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2834 struct btrfs_root *root,
2835 struct btrfs_path *path,
2836 const struct btrfs_key *cpu_key, u32 *data_size,
2839 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2840 struct btrfs_root *root,
2841 struct btrfs_path *path,
2842 const struct btrfs_key *key,
2845 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2848 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2849 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2850 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2852 static inline int btrfs_next_old_item(struct btrfs_root *root,
2853 struct btrfs_path *p, u64 time_seq)
2856 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2857 return btrfs_next_old_leaf(root, p, time_seq);
2860 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2862 return btrfs_next_old_item(root, p, 0);
2864 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2865 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2867 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2868 struct btrfs_root *root,
2869 struct extent_buffer *node,
2870 struct extent_buffer *parent);
2871 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2874 * Do it this way so we only ever do one test_bit in the normal case.
2876 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2877 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2885 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2886 * anything except sleeping. This function is used to check the status of
2889 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2891 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2894 /* tree mod log functions from ctree.c */
2895 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2896 struct seq_list *elem);
2897 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2898 struct seq_list *elem);
2899 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2902 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2903 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2905 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2906 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2908 int btrfs_del_root(struct btrfs_trans_handle *trans,
2909 const struct btrfs_key *key);
2910 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2911 const struct btrfs_key *key,
2912 struct btrfs_root_item *item);
2913 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2914 struct btrfs_root *root,
2915 struct btrfs_key *key,
2916 struct btrfs_root_item *item);
2917 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2918 struct btrfs_path *path, struct btrfs_root_item *root_item,
2919 struct btrfs_key *root_key);
2920 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2921 void btrfs_set_root_node(struct btrfs_root_item *item,
2922 struct extent_buffer *node);
2923 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2924 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2925 struct btrfs_root *root);
2928 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2930 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2932 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2935 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2936 const char *name, int name_len);
2937 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2938 int name_len, struct btrfs_inode *dir,
2939 struct btrfs_key *location, u8 type, u64 index);
2940 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2941 struct btrfs_root *root,
2942 struct btrfs_path *path, u64 dir,
2943 const char *name, int name_len,
2945 struct btrfs_dir_item *
2946 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2947 struct btrfs_root *root,
2948 struct btrfs_path *path, u64 dir,
2949 u64 objectid, const char *name, int name_len,
2951 struct btrfs_dir_item *
2952 btrfs_search_dir_index_item(struct btrfs_root *root,
2953 struct btrfs_path *path, u64 dirid,
2954 const char *name, int name_len);
2955 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2956 struct btrfs_root *root,
2957 struct btrfs_path *path,
2958 struct btrfs_dir_item *di);
2959 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2960 struct btrfs_root *root,
2961 struct btrfs_path *path, u64 objectid,
2962 const char *name, u16 name_len,
2963 const void *data, u16 data_len);
2964 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2965 struct btrfs_root *root,
2966 struct btrfs_path *path, u64 dir,
2967 const char *name, u16 name_len,
2969 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2970 struct btrfs_path *path,
2975 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2976 struct btrfs_root *root, u64 offset);
2977 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2978 struct btrfs_root *root, u64 offset);
2979 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2982 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2983 struct btrfs_root *root,
2984 const char *name, int name_len,
2985 u64 inode_objectid, u64 ref_objectid, u64 index);
2986 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2987 struct btrfs_root *root,
2988 const char *name, int name_len,
2989 u64 inode_objectid, u64 ref_objectid, u64 *index);
2990 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2991 struct btrfs_root *root,
2992 struct btrfs_path *path, u64 objectid);
2993 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2994 *root, struct btrfs_path *path,
2995 struct btrfs_key *location, int mod);
2997 struct btrfs_inode_extref *
2998 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2999 struct btrfs_root *root,
3000 struct btrfs_path *path,
3001 const char *name, int name_len,
3002 u64 inode_objectid, u64 ref_objectid, int ins_len,
3005 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
3006 int slot, const char *name,
3008 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
3009 struct extent_buffer *leaf, int slot, u64 ref_objectid,
3010 const char *name, int name_len);
3012 struct btrfs_dio_private;
3013 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3014 struct btrfs_root *root, u64 bytenr, u64 len);
3015 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst);
3016 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3017 struct btrfs_root *root,
3018 u64 objectid, u64 pos,
3019 u64 disk_offset, u64 disk_num_bytes,
3020 u64 num_bytes, u64 offset, u64 ram_bytes,
3021 u8 compression, u8 encryption, u16 other_encoding);
3022 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3023 struct btrfs_root *root,
3024 struct btrfs_path *path, u64 objectid,
3025 u64 bytenr, int mod);
3026 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3027 struct btrfs_root *root,
3028 struct btrfs_ordered_sum *sums);
3029 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
3030 u64 file_start, int contig);
3031 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3032 struct list_head *list, int search_commit);
3033 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3034 const struct btrfs_path *path,
3035 struct btrfs_file_extent_item *fi,
3036 const bool new_inline,
3037 struct extent_map *em);
3038 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
3040 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
3042 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
3043 u64 btrfs_file_extent_end(const struct btrfs_path *path);
3046 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
3047 int mirror_num, unsigned long bio_flags);
3048 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset,
3049 struct page *page, u64 start, u64 end, int mirror);
3050 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3051 u64 start, u64 len);
3052 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3053 u64 *orig_start, u64 *orig_block_len,
3054 u64 *ram_bytes, bool strict);
3056 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3057 struct btrfs_inode *inode);
3058 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3059 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3060 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3061 struct btrfs_root *root,
3062 struct btrfs_inode *dir, struct btrfs_inode *inode,
3063 const char *name, int name_len);
3064 int btrfs_add_link(struct btrfs_trans_handle *trans,
3065 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3066 const char *name, int name_len, int add_backref, u64 index);
3067 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3068 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
3070 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3071 struct btrfs_root *root,
3072 struct btrfs_inode *inode, u64 new_size,
3075 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3076 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr);
3077 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
3078 unsigned int extra_bits,
3079 struct extent_state **cached_state);
3080 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3081 struct btrfs_root *new_root,
3082 struct btrfs_root *parent_root,
3084 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3086 void btrfs_clear_delalloc_extent(struct inode *inode,
3087 struct extent_state *state, unsigned *bits);
3088 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3089 struct extent_state *other);
3090 void btrfs_split_delalloc_extent(struct inode *inode,
3091 struct extent_state *orig, u64 split);
3092 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3093 unsigned long bio_flags);
3094 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3095 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3096 int btrfs_readpage(struct file *file, struct page *page);
3097 void btrfs_evict_inode(struct inode *inode);
3098 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3099 struct inode *btrfs_alloc_inode(struct super_block *sb);
3100 void btrfs_destroy_inode(struct inode *inode);
3101 void btrfs_free_inode(struct inode *inode);
3102 int btrfs_drop_inode(struct inode *inode);
3103 int __init btrfs_init_cachep(void);
3104 void __cold btrfs_destroy_cachep(void);
3105 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3106 struct btrfs_root *root, struct btrfs_path *path);
3107 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3108 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3109 struct page *page, size_t pg_offset,
3110 u64 start, u64 end);
3111 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3112 struct btrfs_root *root, struct btrfs_inode *inode);
3113 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root, struct btrfs_inode *inode);
3115 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3116 struct btrfs_inode *inode);
3117 int btrfs_orphan_cleanup(struct btrfs_root *root);
3118 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size);
3119 void btrfs_add_delayed_iput(struct inode *inode);
3120 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3121 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3122 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3123 u64 start, u64 num_bytes, u64 min_size,
3124 loff_t actual_len, u64 *alloc_hint);
3125 int btrfs_prealloc_file_range_trans(struct inode *inode,
3126 struct btrfs_trans_handle *trans, int mode,
3127 u64 start, u64 num_bytes, u64 min_size,
3128 loff_t actual_len, u64 *alloc_hint);
3129 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3130 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3131 struct writeback_control *wbc);
3132 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3133 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3134 u64 end, int uptodate);
3135 extern const struct dentry_operations btrfs_dentry_operations;
3136 extern const struct iomap_ops btrfs_dio_iomap_ops;
3137 extern const struct iomap_dio_ops btrfs_dio_ops;
3139 /* Inode locking type flags, by default the exclusive lock is taken */
3140 #define BTRFS_ILOCK_SHARED (1U << 0)
3141 #define BTRFS_ILOCK_TRY (1U << 1)
3143 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags);
3144 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags);
3145 void btrfs_update_inode_bytes(struct btrfs_inode *inode,
3146 const u64 add_bytes,
3147 const u64 del_bytes);
3150 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3151 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3152 int btrfs_ioctl_get_supported_features(void __user *arg);
3153 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3154 int __pure btrfs_is_empty_uuid(u8 *uuid);
3155 int btrfs_defrag_file(struct inode *inode, struct file *file,
3156 struct btrfs_ioctl_defrag_range_args *range,
3157 u64 newer_than, unsigned long max_pages);
3158 void btrfs_get_block_group_info(struct list_head *groups_list,
3159 struct btrfs_ioctl_space_info *space);
3160 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3161 struct btrfs_ioctl_balance_args *bargs);
3162 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3163 enum btrfs_exclusive_operation type);
3164 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3167 int __init btrfs_auto_defrag_init(void);
3168 void __cold btrfs_auto_defrag_exit(void);
3169 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3170 struct btrfs_inode *inode);
3171 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3172 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3173 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3174 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3176 extern const struct file_operations btrfs_file_operations;
3177 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3178 struct btrfs_root *root, struct btrfs_inode *inode,
3179 struct btrfs_drop_extents_args *args);
3180 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path,
3181 const u64 start, const u64 end,
3182 struct btrfs_replace_extent_info *extent_info,
3183 struct btrfs_trans_handle **trans_out);
3184 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3185 struct btrfs_inode *inode, u64 start, u64 end);
3186 int btrfs_release_file(struct inode *inode, struct file *file);
3187 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3188 size_t num_pages, loff_t pos, size_t write_bytes,
3189 struct extent_state **cached, bool noreserve);
3190 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3191 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3192 size_t *write_bytes);
3193 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3196 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3197 struct btrfs_root *root);
3200 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3201 unsigned long new_flags);
3202 int btrfs_sync_fs(struct super_block *sb, int wait);
3203 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3204 u64 subvol_objectid);
3206 static inline __printf(2, 3) __cold
3207 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3211 #ifdef CONFIG_PRINTK
3214 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3216 #define btrfs_printk(fs_info, fmt, args...) \
3217 btrfs_no_printk(fs_info, fmt, ##args)
3220 #define btrfs_emerg(fs_info, fmt, args...) \
3221 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3222 #define btrfs_alert(fs_info, fmt, args...) \
3223 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3224 #define btrfs_crit(fs_info, fmt, args...) \
3225 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3226 #define btrfs_err(fs_info, fmt, args...) \
3227 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3228 #define btrfs_warn(fs_info, fmt, args...) \
3229 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3230 #define btrfs_notice(fs_info, fmt, args...) \
3231 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3232 #define btrfs_info(fs_info, fmt, args...) \
3233 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3236 * Wrappers that use printk_in_rcu
3238 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3239 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3240 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3241 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3242 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3243 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3244 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3245 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3246 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3247 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3248 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3249 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3250 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3251 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3254 * Wrappers that use a ratelimited printk_in_rcu
3256 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3257 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3258 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3259 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3260 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3261 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3262 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3263 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3264 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3265 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3266 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3267 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3268 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3269 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3272 * Wrappers that use a ratelimited printk
3274 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3275 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3276 #define btrfs_alert_rl(fs_info, fmt, args...) \
3277 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3278 #define btrfs_crit_rl(fs_info, fmt, args...) \
3279 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3280 #define btrfs_err_rl(fs_info, fmt, args...) \
3281 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3282 #define btrfs_warn_rl(fs_info, fmt, args...) \
3283 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3284 #define btrfs_notice_rl(fs_info, fmt, args...) \
3285 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3286 #define btrfs_info_rl(fs_info, fmt, args...) \
3287 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3289 #if defined(CONFIG_DYNAMIC_DEBUG)
3290 #define btrfs_debug(fs_info, fmt, args...) \
3291 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3292 fs_info, KERN_DEBUG fmt, ##args)
3293 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3294 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3295 fs_info, KERN_DEBUG fmt, ##args)
3296 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3297 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3298 fs_info, KERN_DEBUG fmt, ##args)
3299 #define btrfs_debug_rl(fs_info, fmt, args...) \
3300 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3301 fs_info, KERN_DEBUG fmt, ##args)
3302 #elif defined(DEBUG)
3303 #define btrfs_debug(fs_info, fmt, args...) \
3304 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3305 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3306 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3307 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3308 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3309 #define btrfs_debug_rl(fs_info, fmt, args...) \
3310 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3312 #define btrfs_debug(fs_info, fmt, args...) \
3313 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3314 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3315 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3316 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3317 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3318 #define btrfs_debug_rl(fs_info, fmt, args...) \
3319 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3322 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3325 btrfs_printk(fs_info, fmt, ##args); \
3326 rcu_read_unlock(); \
3329 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3332 btrfs_no_printk(fs_info, fmt, ##args); \
3333 rcu_read_unlock(); \
3336 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3338 static DEFINE_RATELIMIT_STATE(_rs, \
3339 DEFAULT_RATELIMIT_INTERVAL, \
3340 DEFAULT_RATELIMIT_BURST); \
3341 if (__ratelimit(&_rs)) \
3342 btrfs_printk(fs_info, fmt, ##args); \
3345 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3348 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3349 rcu_read_unlock(); \
3352 #ifdef CONFIG_BTRFS_ASSERT
3354 static inline void assertfail(const char *expr, const char *file, int line)
3356 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3360 #define ASSERT(expr) \
3361 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3364 static inline void assertfail(const char *expr, const char* file, int line) { }
3365 #define ASSERT(expr) (void)(expr)
3369 * Get the correct offset inside the page of extent buffer.
3371 * @eb: target extent buffer
3372 * @start: offset inside the extent buffer
3374 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases.
3376 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb,
3377 unsigned long offset)
3380 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned
3381 * to PAGE_SIZE, thus adding it won't cause any difference.
3383 * For sectorsize < PAGE_SIZE, we must only read the data that belongs
3384 * to the eb, thus we have to take the eb->start into consideration.
3386 return offset_in_page(offset + eb->start);
3389 static inline unsigned long get_eb_page_index(unsigned long offset)
3392 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough.
3394 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE,
3395 * and have ensured that all tree blocks are contained in one page,
3396 * thus we always get index == 0.
3398 return offset >> PAGE_SHIFT;
3402 * Use that for functions that are conditionally exported for sanity tests but
3405 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3406 #define EXPORT_FOR_TESTS static
3408 #define EXPORT_FOR_TESTS
3412 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3415 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3420 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3421 unsigned int line, int errno, const char *fmt, ...);
3423 const char * __attribute_const__ btrfs_decode_error(int errno);
3426 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3427 const char *function,
3428 unsigned int line, int errno);
3431 * Call btrfs_abort_transaction as early as possible when an error condition is
3432 * detected, that way the exact line number is reported.
3434 #define btrfs_abort_transaction(trans, errno) \
3436 /* Report first abort since mount */ \
3437 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3438 &((trans)->fs_info->fs_state))) { \
3439 if ((errno) != -EIO && (errno) != -EROFS) { \
3440 WARN(1, KERN_DEBUG \
3441 "BTRFS: Transaction aborted (error %d)\n", \
3444 btrfs_debug((trans)->fs_info, \
3445 "Transaction aborted (error %d)", \
3449 __btrfs_abort_transaction((trans), __func__, \
3450 __LINE__, (errno)); \
3453 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3455 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3456 (errno), fmt, ##args); \
3461 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3462 unsigned int line, int errno, const char *fmt, ...);
3464 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3465 * will panic(). Otherwise we BUG() here.
3467 #define btrfs_panic(fs_info, errno, fmt, args...) \
3469 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3474 /* compatibility and incompatibility defines */
3476 #define btrfs_set_fs_incompat(__fs_info, opt) \
3477 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3480 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3481 u64 flag, const char* name)
3483 struct btrfs_super_block *disk_super;
3486 disk_super = fs_info->super_copy;
3487 features = btrfs_super_incompat_flags(disk_super);
3488 if (!(features & flag)) {
3489 spin_lock(&fs_info->super_lock);
3490 features = btrfs_super_incompat_flags(disk_super);
3491 if (!(features & flag)) {
3493 btrfs_set_super_incompat_flags(disk_super, features);
3495 "setting incompat feature flag for %s (0x%llx)",
3498 spin_unlock(&fs_info->super_lock);
3502 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3503 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3506 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3507 u64 flag, const char* name)
3509 struct btrfs_super_block *disk_super;
3512 disk_super = fs_info->super_copy;
3513 features = btrfs_super_incompat_flags(disk_super);
3514 if (features & flag) {
3515 spin_lock(&fs_info->super_lock);
3516 features = btrfs_super_incompat_flags(disk_super);
3517 if (features & flag) {
3519 btrfs_set_super_incompat_flags(disk_super, features);
3521 "clearing incompat feature flag for %s (0x%llx)",
3524 spin_unlock(&fs_info->super_lock);
3528 #define btrfs_fs_incompat(fs_info, opt) \
3529 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3531 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3533 struct btrfs_super_block *disk_super;
3534 disk_super = fs_info->super_copy;
3535 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3538 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3539 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3542 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3543 u64 flag, const char *name)
3545 struct btrfs_super_block *disk_super;
3548 disk_super = fs_info->super_copy;
3549 features = btrfs_super_compat_ro_flags(disk_super);
3550 if (!(features & flag)) {
3551 spin_lock(&fs_info->super_lock);
3552 features = btrfs_super_compat_ro_flags(disk_super);
3553 if (!(features & flag)) {
3555 btrfs_set_super_compat_ro_flags(disk_super, features);
3557 "setting compat-ro feature flag for %s (0x%llx)",
3560 spin_unlock(&fs_info->super_lock);
3564 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3565 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3568 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3569 u64 flag, const char *name)
3571 struct btrfs_super_block *disk_super;
3574 disk_super = fs_info->super_copy;
3575 features = btrfs_super_compat_ro_flags(disk_super);
3576 if (features & flag) {
3577 spin_lock(&fs_info->super_lock);
3578 features = btrfs_super_compat_ro_flags(disk_super);
3579 if (features & flag) {
3581 btrfs_set_super_compat_ro_flags(disk_super, features);
3583 "clearing compat-ro feature flag for %s (0x%llx)",
3586 spin_unlock(&fs_info->super_lock);
3590 #define btrfs_fs_compat_ro(fs_info, opt) \
3591 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3593 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3595 struct btrfs_super_block *disk_super;
3596 disk_super = fs_info->super_copy;
3597 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3601 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3602 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3603 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3604 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3605 struct inode *inode, struct inode *dir);
3607 #define btrfs_get_acl NULL
3608 #define btrfs_set_acl NULL
3609 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3610 struct inode *inode, struct inode *dir)
3617 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3618 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3619 struct btrfs_root *root);
3620 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3621 struct btrfs_root *root);
3622 int btrfs_recover_relocation(struct btrfs_root *root);
3623 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3624 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3625 struct btrfs_root *root, struct extent_buffer *buf,
3626 struct extent_buffer *cow);
3627 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3628 u64 *bytes_to_reserve);
3629 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3630 struct btrfs_pending_snapshot *pending);
3631 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3632 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3634 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3637 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3638 u64 end, struct btrfs_scrub_progress *progress,
3639 int readonly, int is_dev_replace);
3640 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3641 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3642 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3643 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3644 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3645 struct btrfs_scrub_progress *progress);
3646 static inline void btrfs_init_full_stripe_locks_tree(
3647 struct btrfs_full_stripe_locks_tree *locks_root)
3649 locks_root->root = RB_ROOT;
3650 mutex_init(&locks_root->lock);
3654 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3655 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3656 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3658 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3660 btrfs_bio_counter_sub(fs_info, 1);
3664 struct reada_control {
3665 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3666 struct btrfs_key key_start;
3667 struct btrfs_key key_end; /* exclusive */
3670 wait_queue_head_t wait;
3672 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3673 struct btrfs_key *start, struct btrfs_key *end);
3674 int btrfs_reada_wait(void *handle);
3675 void btrfs_reada_detach(void *handle);
3676 int btree_readahead_hook(struct extent_buffer *eb, int err);
3677 void btrfs_reada_remove_dev(struct btrfs_device *dev);
3678 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev);
3680 static inline int is_fstree(u64 rootid)
3682 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3683 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3684 !btrfs_qgroup_level(rootid)))
3689 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3691 return signal_pending(current);
3694 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3696 /* Sanity test specific functions */
3697 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3698 void btrfs_test_destroy_inode(struct inode *inode);
3699 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3701 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3704 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3710 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
3712 return fs_info->zoned != 0;