1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include <linux/iomap.h>
32 #include "extent-io-tree.h"
33 #include "extent_io.h"
34 #include "extent_map.h"
35 #include "async-thread.h"
36 #include "block-rsv.h"
39 struct btrfs_trans_handle;
40 struct btrfs_transaction;
41 struct btrfs_pending_snapshot;
42 struct btrfs_delayed_ref_root;
43 struct btrfs_space_info;
44 struct btrfs_block_group;
45 extern struct kmem_cache *btrfs_trans_handle_cachep;
46 extern struct kmem_cache *btrfs_bit_radix_cachep;
47 extern struct kmem_cache *btrfs_path_cachep;
48 extern struct kmem_cache *btrfs_free_space_cachep;
49 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
50 struct btrfs_ordered_sum;
53 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
56 * Maximum number of mirrors that can be available for all profiles counting
57 * the target device of dev-replace as one. During an active device replace
58 * procedure, the target device of the copy operation is a mirror for the
59 * filesystem data as well that can be used to read data in order to repair
60 * read errors on other disks.
62 * Current value is derived from RAID1C4 with 4 copies.
64 #define BTRFS_MAX_MIRRORS (4 + 1)
66 #define BTRFS_MAX_LEVEL 8
68 #define BTRFS_OLDEST_GENERATION 0ULL
71 * the max metadata block size. This limit is somewhat artificial,
72 * but the memmove costs go through the roof for larger blocks.
74 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
77 * we can actually store much bigger names, but lets not confuse the rest
80 #define BTRFS_NAME_LEN 255
83 * Theoretical limit is larger, but we keep this down to a sane
84 * value. That should limit greatly the possibility of collisions on
87 #define BTRFS_LINK_MAX 65535U
89 #define BTRFS_EMPTY_DIR_SIZE 0
91 /* ioprio of readahead is set to idle */
92 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
94 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
97 * Use large batch size to reduce overhead of metadata updates. On the reader
98 * side, we only read it when we are close to ENOSPC and the read overhead is
99 * mostly related to the number of CPUs, so it is OK to use arbitrary large
102 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
104 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
107 * Deltas are an effective way to populate global statistics. Give macro names
108 * to make it clear what we're doing. An example is discard_extents in
109 * btrfs_free_space_ctl.
111 #define BTRFS_STAT_NR_ENTRIES 2
112 #define BTRFS_STAT_CURR 0
113 #define BTRFS_STAT_PREV 1
116 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
118 static inline u32 count_max_extents(u64 size)
120 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
123 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
125 BUG_ON(num_stripes == 0);
126 return sizeof(struct btrfs_chunk) +
127 sizeof(struct btrfs_stripe) * (num_stripes - 1);
131 * Runtime (in-memory) states of filesystem
134 /* Global indicator of serious filesystem errors */
135 BTRFS_FS_STATE_ERROR,
137 * Filesystem is being remounted, allow to skip some operations, like
140 BTRFS_FS_STATE_REMOUNTING,
141 /* Track if a transaction abort has been reported on this filesystem */
142 BTRFS_FS_STATE_TRANS_ABORTED,
144 * Bio operations should be blocked on this filesystem because a source
145 * or target device is being destroyed as part of a device replace
147 BTRFS_FS_STATE_DEV_REPLACING,
148 /* The btrfs_fs_info created for self-tests */
149 BTRFS_FS_STATE_DUMMY_FS_INFO,
152 #define BTRFS_BACKREF_REV_MAX 256
153 #define BTRFS_BACKREF_REV_SHIFT 56
154 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
155 BTRFS_BACKREF_REV_SHIFT)
157 #define BTRFS_OLD_BACKREF_REV 0
158 #define BTRFS_MIXED_BACKREF_REV 1
161 * every tree block (leaf or node) starts with this header.
163 struct btrfs_header {
164 /* these first four must match the super block */
165 u8 csum[BTRFS_CSUM_SIZE];
166 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
167 __le64 bytenr; /* which block this node is supposed to live in */
170 /* allowed to be different from the super from here on down */
171 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
176 } __attribute__ ((__packed__));
179 * this is a very generous portion of the super block, giving us
180 * room to translate 14 chunks with 3 stripes each.
182 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
185 * just in case we somehow lose the roots and are not able to mount,
186 * we store an array of the roots from previous transactions
189 #define BTRFS_NUM_BACKUP_ROOTS 4
190 struct btrfs_root_backup {
192 __le64 tree_root_gen;
195 __le64 chunk_root_gen;
198 __le64 extent_root_gen;
207 __le64 csum_root_gen;
217 u8 extent_root_level;
221 /* future and to align */
223 } __attribute__ ((__packed__));
226 * the super block basically lists the main trees of the FS
227 * it currently lacks any block count etc etc
229 struct btrfs_super_block {
230 /* the first 4 fields must match struct btrfs_header */
231 u8 csum[BTRFS_CSUM_SIZE];
232 /* FS specific UUID, visible to user */
233 u8 fsid[BTRFS_FSID_SIZE];
234 __le64 bytenr; /* this block number */
237 /* allowed to be different from the btrfs_header from here own down */
244 /* this will help find the new super based on the log root */
245 __le64 log_root_transid;
248 __le64 root_dir_objectid;
252 __le32 __unused_leafsize;
254 __le32 sys_chunk_array_size;
255 __le64 chunk_root_generation;
257 __le64 compat_ro_flags;
258 __le64 incompat_flags;
263 struct btrfs_dev_item dev_item;
265 char label[BTRFS_LABEL_SIZE];
267 __le64 cache_generation;
268 __le64 uuid_tree_generation;
270 /* the UUID written into btree blocks */
271 u8 metadata_uuid[BTRFS_FSID_SIZE];
273 /* future expansion */
275 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
276 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
277 } __attribute__ ((__packed__));
280 * Compat flags that we support. If any incompat flags are set other than the
281 * ones specified below then we will fail to mount
283 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
284 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
285 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
287 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
288 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
289 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
292 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
294 #define BTRFS_FEATURE_INCOMPAT_SUPP \
295 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
296 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
297 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
298 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
299 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
300 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
301 BTRFS_FEATURE_INCOMPAT_RAID56 | \
302 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
303 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
304 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
305 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
306 BTRFS_FEATURE_INCOMPAT_RAID1C34)
308 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
309 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
310 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
313 * A leaf is full of items. offset and size tell us where to find
314 * the item in the leaf (relative to the start of the data area)
317 struct btrfs_disk_key key;
320 } __attribute__ ((__packed__));
323 * leaves have an item area and a data area:
324 * [item0, item1....itemN] [free space] [dataN...data1, data0]
326 * The data is separate from the items to get the keys closer together
330 struct btrfs_header header;
331 struct btrfs_item items[];
332 } __attribute__ ((__packed__));
335 * all non-leaf blocks are nodes, they hold only keys and pointers to
338 struct btrfs_key_ptr {
339 struct btrfs_disk_key key;
342 } __attribute__ ((__packed__));
345 struct btrfs_header header;
346 struct btrfs_key_ptr ptrs[];
347 } __attribute__ ((__packed__));
350 * btrfs_paths remember the path taken from the root down to the leaf.
351 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
352 * to any other levels that are present.
354 * The slots array records the index of the item or block pointer
355 * used while walking the tree.
357 enum { READA_NONE, READA_BACK, READA_FORWARD };
359 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
360 int slots[BTRFS_MAX_LEVEL];
361 /* if there is real range locking, this locks field will change */
362 u8 locks[BTRFS_MAX_LEVEL];
364 /* keep some upper locks as we walk down */
368 * set by btrfs_split_item, tells search_slot to keep all locks
369 * and to force calls to keep space in the nodes
371 unsigned int search_for_split:1;
372 unsigned int keep_locks:1;
373 unsigned int skip_locking:1;
374 unsigned int search_commit_root:1;
375 unsigned int need_commit_sem:1;
376 unsigned int skip_release_on_error:1;
377 unsigned int recurse:1;
379 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
380 sizeof(struct btrfs_item))
381 struct btrfs_dev_replace {
382 u64 replace_state; /* see #define above */
383 time64_t time_started; /* seconds since 1-Jan-1970 */
384 time64_t time_stopped; /* seconds since 1-Jan-1970 */
385 atomic64_t num_write_errors;
386 atomic64_t num_uncorrectable_read_errors;
389 u64 committed_cursor_left;
390 u64 cursor_left_last_write_of_item;
393 u64 cont_reading_from_srcdev_mode; /* see #define above */
396 int item_needs_writeback;
397 struct btrfs_device *srcdev;
398 struct btrfs_device *tgtdev;
400 struct mutex lock_finishing_cancel_unmount;
401 struct rw_semaphore rwsem;
403 struct btrfs_scrub_progress scrub_progress;
405 struct percpu_counter bio_counter;
406 wait_queue_head_t replace_wait;
410 * free clusters are used to claim free space in relatively large chunks,
411 * allowing us to do less seeky writes. They are used for all metadata
412 * allocations. In ssd_spread mode they are also used for data allocations.
414 struct btrfs_free_cluster {
416 spinlock_t refill_lock;
419 /* largest extent in this cluster */
422 /* first extent starting offset */
425 /* We did a full search and couldn't create a cluster */
428 struct btrfs_block_group *block_group;
430 * when a cluster is allocated from a block group, we put the
431 * cluster onto a list in the block group so that it can
432 * be freed before the block group is freed.
434 struct list_head block_group_list;
437 enum btrfs_caching_type {
441 BTRFS_CACHE_FINISHED,
446 * Tree to record all locked full stripes of a RAID5/6 block group
448 struct btrfs_full_stripe_locks_tree {
453 /* Discard control. */
455 * Async discard uses multiple lists to differentiate the discard filter
456 * parameters. Index 0 is for completely free block groups where we need to
457 * ensure the entire block group is trimmed without being lossy. Indices
458 * afterwards represent monotonically decreasing discard filter sizes to
459 * prioritize what should be discarded next.
461 #define BTRFS_NR_DISCARD_LISTS 3
462 #define BTRFS_DISCARD_INDEX_UNUSED 0
463 #define BTRFS_DISCARD_INDEX_START 1
465 struct btrfs_discard_ctl {
466 struct workqueue_struct *discard_workers;
467 struct delayed_work work;
469 struct btrfs_block_group *block_group;
470 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
472 atomic_t discardable_extents;
473 atomic64_t discardable_bytes;
474 u64 max_discard_size;
478 u64 discard_extent_bytes;
479 u64 discard_bitmap_bytes;
480 atomic64_t discard_bytes_saved;
483 /* delayed seq elem */
485 struct list_head list;
489 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
491 #define SEQ_LAST ((u64)-1)
493 enum btrfs_orphan_cleanup_state {
494 ORPHAN_CLEANUP_STARTED = 1,
495 ORPHAN_CLEANUP_DONE = 2,
498 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
501 struct reloc_control;
503 struct btrfs_fs_devices;
504 struct btrfs_balance_control;
505 struct btrfs_delayed_root;
508 * Block group or device which contains an active swapfile. Used for preventing
509 * unsafe operations while a swapfile is active.
511 * These are sorted on (ptr, inode) (note that a block group or device can
512 * contain more than one swapfile). We compare the pointer values because we
513 * don't actually care what the object is, we just need a quick check whether
514 * the object exists in the rbtree.
516 struct btrfs_swapfile_pin {
521 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
522 * points to a struct btrfs_device.
527 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
531 BTRFS_FS_CLOSING_START,
532 BTRFS_FS_CLOSING_DONE,
533 BTRFS_FS_LOG_RECOVERING,
535 BTRFS_FS_QUOTA_ENABLED,
536 BTRFS_FS_UPDATE_UUID_TREE_GEN,
537 BTRFS_FS_CREATING_FREE_SPACE_TREE,
541 BTRFS_FS_QUOTA_OVERRIDE,
542 /* Used to record internally whether fs has been frozen */
545 * Indicate that balance has been set up from the ioctl and is in the
546 * main phase. The fs_info::balance_ctl is initialized.
547 * Set and cleared while holding fs_info::balance_mutex.
549 BTRFS_FS_BALANCE_RUNNING,
551 /* Indicate that the cleaner thread is awake and doing something. */
552 BTRFS_FS_CLEANER_RUNNING,
555 * The checksumming has an optimized version and is considered fast,
556 * so we don't need to offload checksums to workqueues.
558 BTRFS_FS_CSUM_IMPL_FAST,
560 /* Indicate that the discard workqueue can service discards. */
561 BTRFS_FS_DISCARD_RUNNING,
565 * Exclusive operations (device replace, resize, device add/remove, balance)
567 enum btrfs_exclusive_operation {
569 BTRFS_EXCLOP_BALANCE,
570 BTRFS_EXCLOP_DEV_ADD,
571 BTRFS_EXCLOP_DEV_REMOVE,
572 BTRFS_EXCLOP_DEV_REPLACE,
574 BTRFS_EXCLOP_SWAP_ACTIVATE,
577 struct btrfs_fs_info {
578 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
580 struct btrfs_root *extent_root;
581 struct btrfs_root *tree_root;
582 struct btrfs_root *chunk_root;
583 struct btrfs_root *dev_root;
584 struct btrfs_root *fs_root;
585 struct btrfs_root *csum_root;
586 struct btrfs_root *quota_root;
587 struct btrfs_root *uuid_root;
588 struct btrfs_root *free_space_root;
589 struct btrfs_root *data_reloc_root;
591 /* the log root tree is a directory of all the other log roots */
592 struct btrfs_root *log_root_tree;
594 spinlock_t fs_roots_radix_lock;
595 struct radix_tree_root fs_roots_radix;
597 /* block group cache stuff */
598 spinlock_t block_group_cache_lock;
599 u64 first_logical_byte;
600 struct rb_root block_group_cache_tree;
602 /* keep track of unallocated space */
603 atomic64_t free_chunk_space;
605 /* Track ranges which are used by log trees blocks/logged data extents */
606 struct extent_io_tree excluded_extents;
608 /* logical->physical extent mapping */
609 struct extent_map_tree mapping_tree;
612 * block reservation for extent, checksum, root tree and
613 * delayed dir index item
615 struct btrfs_block_rsv global_block_rsv;
616 /* block reservation for metadata operations */
617 struct btrfs_block_rsv trans_block_rsv;
618 /* block reservation for chunk tree */
619 struct btrfs_block_rsv chunk_block_rsv;
620 /* block reservation for delayed operations */
621 struct btrfs_block_rsv delayed_block_rsv;
622 /* block reservation for delayed refs */
623 struct btrfs_block_rsv delayed_refs_rsv;
625 struct btrfs_block_rsv empty_block_rsv;
628 u64 last_trans_committed;
629 u64 avg_delayed_ref_runtime;
632 * this is updated to the current trans every time a full commit
633 * is required instead of the faster short fsync log commits
635 u64 last_trans_log_full_commit;
636 unsigned long mount_opt;
638 * Track requests for actions that need to be done during transaction
639 * commit (like for some mount options).
641 unsigned long pending_changes;
642 unsigned long compress_type:4;
643 unsigned int compress_level;
646 * It is a suggestive number, the read side is safe even it gets a
647 * wrong number because we will write out the data into a regular
648 * extent. The write side(mount/remount) is under ->s_umount lock,
649 * so it is also safe.
653 struct btrfs_transaction *running_transaction;
654 wait_queue_head_t transaction_throttle;
655 wait_queue_head_t transaction_wait;
656 wait_queue_head_t transaction_blocked_wait;
657 wait_queue_head_t async_submit_wait;
660 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
661 * when they are updated.
663 * Because we do not clear the flags for ever, so we needn't use
664 * the lock on the read side.
666 * We also needn't use the lock when we mount the fs, because
667 * there is no other task which will update the flag.
669 spinlock_t super_lock;
670 struct btrfs_super_block *super_copy;
671 struct btrfs_super_block *super_for_commit;
672 struct super_block *sb;
673 struct inode *btree_inode;
674 struct mutex tree_log_mutex;
675 struct mutex transaction_kthread_mutex;
676 struct mutex cleaner_mutex;
677 struct mutex chunk_mutex;
680 * this is taken to make sure we don't set block groups ro after
681 * the free space cache has been allocated on them
683 struct mutex ro_block_group_mutex;
685 /* this is used during read/modify/write to make sure
686 * no two ios are trying to mod the same stripe at the same
689 struct btrfs_stripe_hash_table *stripe_hash_table;
692 * this protects the ordered operations list only while we are
693 * processing all of the entries on it. This way we make
694 * sure the commit code doesn't find the list temporarily empty
695 * because another function happens to be doing non-waiting preflush
696 * before jumping into the main commit.
698 struct mutex ordered_operations_mutex;
700 struct rw_semaphore commit_root_sem;
702 struct rw_semaphore cleanup_work_sem;
704 struct rw_semaphore subvol_sem;
706 spinlock_t trans_lock;
708 * the reloc mutex goes with the trans lock, it is taken
709 * during commit to protect us from the relocation code
711 struct mutex reloc_mutex;
713 struct list_head trans_list;
714 struct list_head dead_roots;
715 struct list_head caching_block_groups;
717 spinlock_t delayed_iput_lock;
718 struct list_head delayed_iputs;
719 atomic_t nr_delayed_iputs;
720 wait_queue_head_t delayed_iputs_wait;
722 atomic64_t tree_mod_seq;
724 /* this protects tree_mod_log and tree_mod_seq_list */
725 rwlock_t tree_mod_log_lock;
726 struct rb_root tree_mod_log;
727 struct list_head tree_mod_seq_list;
729 atomic_t async_delalloc_pages;
732 * this is used to protect the following list -- ordered_roots.
734 spinlock_t ordered_root_lock;
737 * all fs/file tree roots in which there are data=ordered extents
738 * pending writeback are added into this list.
740 * these can span multiple transactions and basically include
741 * every dirty data page that isn't from nodatacow
743 struct list_head ordered_roots;
745 struct mutex delalloc_root_mutex;
746 spinlock_t delalloc_root_lock;
747 /* all fs/file tree roots that have delalloc inodes. */
748 struct list_head delalloc_roots;
751 * there is a pool of worker threads for checksumming during writes
752 * and a pool for checksumming after reads. This is because readers
753 * can run with FS locks held, and the writers may be waiting for
754 * those locks. We don't want ordering in the pending list to cause
755 * deadlocks, and so the two are serviced separately.
757 * A third pool does submit_bio to avoid deadlocking with the other
760 struct btrfs_workqueue *workers;
761 struct btrfs_workqueue *delalloc_workers;
762 struct btrfs_workqueue *flush_workers;
763 struct btrfs_workqueue *endio_workers;
764 struct btrfs_workqueue *endio_meta_workers;
765 struct btrfs_workqueue *endio_raid56_workers;
766 struct btrfs_workqueue *rmw_workers;
767 struct btrfs_workqueue *endio_meta_write_workers;
768 struct btrfs_workqueue *endio_write_workers;
769 struct btrfs_workqueue *endio_freespace_worker;
770 struct btrfs_workqueue *caching_workers;
771 struct btrfs_workqueue *readahead_workers;
774 * fixup workers take dirty pages that didn't properly go through
775 * the cow mechanism and make them safe to write. It happens
776 * for the sys_munmap function call path
778 struct btrfs_workqueue *fixup_workers;
779 struct btrfs_workqueue *delayed_workers;
781 struct task_struct *transaction_kthread;
782 struct task_struct *cleaner_kthread;
783 u32 thread_pool_size;
785 struct kobject *space_info_kobj;
786 struct kobject *qgroups_kobj;
790 /* used to keep from writing metadata until there is a nice batch */
791 struct percpu_counter dirty_metadata_bytes;
792 struct percpu_counter delalloc_bytes;
793 struct percpu_counter dio_bytes;
794 s32 dirty_metadata_batch;
797 struct list_head dirty_cowonly_roots;
799 struct btrfs_fs_devices *fs_devices;
802 * The space_info list is effectively read only after initial
803 * setup. It is populated at mount time and cleaned up after
804 * all block groups are removed. RCU is used to protect it.
806 struct list_head space_info;
808 struct btrfs_space_info *data_sinfo;
810 struct reloc_control *reloc_ctl;
812 /* data_alloc_cluster is only used in ssd_spread mode */
813 struct btrfs_free_cluster data_alloc_cluster;
815 /* all metadata allocations go through this cluster */
816 struct btrfs_free_cluster meta_alloc_cluster;
818 /* auto defrag inodes go here */
819 spinlock_t defrag_inodes_lock;
820 struct rb_root defrag_inodes;
821 atomic_t defrag_running;
823 /* Used to protect avail_{data, metadata, system}_alloc_bits */
824 seqlock_t profiles_lock;
826 * these three are in extended format (availability of single
827 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
828 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
830 u64 avail_data_alloc_bits;
831 u64 avail_metadata_alloc_bits;
832 u64 avail_system_alloc_bits;
834 /* restriper state */
835 spinlock_t balance_lock;
836 struct mutex balance_mutex;
837 atomic_t balance_pause_req;
838 atomic_t balance_cancel_req;
839 struct btrfs_balance_control *balance_ctl;
840 wait_queue_head_t balance_wait_q;
842 u32 data_chunk_allocations;
847 /* private scrub information */
848 struct mutex scrub_lock;
849 atomic_t scrubs_running;
850 atomic_t scrub_pause_req;
851 atomic_t scrubs_paused;
852 atomic_t scrub_cancel_req;
853 wait_queue_head_t scrub_pause_wait;
855 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
858 refcount_t scrub_workers_refcnt;
859 struct btrfs_workqueue *scrub_workers;
860 struct btrfs_workqueue *scrub_wr_completion_workers;
861 struct btrfs_workqueue *scrub_parity_workers;
863 struct btrfs_discard_ctl discard_ctl;
865 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
866 u32 check_integrity_print_mask;
868 /* is qgroup tracking in a consistent state? */
871 /* holds configuration and tracking. Protected by qgroup_lock */
872 struct rb_root qgroup_tree;
873 spinlock_t qgroup_lock;
876 * used to avoid frequently calling ulist_alloc()/ulist_free()
877 * when doing qgroup accounting, it must be protected by qgroup_lock.
879 struct ulist *qgroup_ulist;
882 * Protect user change for quota operations. If a transaction is needed,
883 * it must be started before locking this lock.
885 struct mutex qgroup_ioctl_lock;
887 /* list of dirty qgroups to be written at next commit */
888 struct list_head dirty_qgroups;
890 /* used by qgroup for an efficient tree traversal */
893 /* qgroup rescan items */
894 struct mutex qgroup_rescan_lock; /* protects the progress item */
895 struct btrfs_key qgroup_rescan_progress;
896 struct btrfs_workqueue *qgroup_rescan_workers;
897 struct completion qgroup_rescan_completion;
898 struct btrfs_work qgroup_rescan_work;
899 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
901 /* filesystem state */
902 unsigned long fs_state;
904 struct btrfs_delayed_root *delayed_root;
907 spinlock_t reada_lock;
908 struct radix_tree_root reada_tree;
910 /* readahead works cnt */
911 atomic_t reada_works_cnt;
913 /* Extent buffer radix tree */
914 spinlock_t buffer_lock;
915 /* Entries are eb->start / sectorsize */
916 struct radix_tree_root buffer_radix;
918 /* next backup root to be overwritten */
919 int backup_root_index;
921 /* device replace state */
922 struct btrfs_dev_replace dev_replace;
924 struct semaphore uuid_tree_rescan_sem;
926 /* Used to reclaim the metadata space in the background. */
927 struct work_struct async_reclaim_work;
928 struct work_struct async_data_reclaim_work;
930 spinlock_t unused_bgs_lock;
931 struct list_head unused_bgs;
932 struct mutex unused_bg_unpin_mutex;
933 struct mutex delete_unused_bgs_mutex;
935 /* Cached block sizes */
938 /* ilog2 of sectorsize, use to avoid 64bit division */
944 /* Block groups and devices containing active swapfiles. */
945 spinlock_t swapfile_pins_lock;
946 struct rb_root swapfile_pins;
948 struct crypto_shash *csum_shash;
951 * Number of send operations in progress.
952 * Updated while holding fs_info::balance_mutex.
954 int send_in_progress;
956 /* Type of exclusive operation running */
957 unsigned long exclusive_operation;
959 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
960 spinlock_t ref_verify_lock;
961 struct rb_root block_tree;
964 #ifdef CONFIG_BTRFS_DEBUG
965 struct kobject *debug_kobj;
966 struct kobject *discard_debug_kobj;
967 struct list_head allocated_roots;
969 spinlock_t eb_leak_lock;
970 struct list_head allocated_ebs;
974 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
976 return sb->s_fs_info;
980 * The state of btrfs root
984 * btrfs_record_root_in_trans is a multi-step process, and it can race
985 * with the balancing code. But the race is very small, and only the
986 * first time the root is added to each transaction. So IN_TRANS_SETUP
987 * is used to tell us when more checks are required
989 BTRFS_ROOT_IN_TRANS_SETUP,
992 * Set if tree blocks of this root can be shared by other roots.
993 * Only subvolume trees and their reloc trees have this bit set.
994 * Conflicts with TRACK_DIRTY bit.
996 * This affects two things:
998 * - How balance works
999 * For shareable roots, we need to use reloc tree and do path
1000 * replacement for balance, and need various pre/post hooks for
1001 * snapshot creation to handle them.
1003 * While for non-shareable trees, we just simply do a tree search
1006 * - How dirty roots are tracked
1007 * For shareable roots, btrfs_record_root_in_trans() is needed to
1008 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1009 * don't need to set this manually.
1011 BTRFS_ROOT_SHAREABLE,
1012 BTRFS_ROOT_TRACK_DIRTY,
1013 BTRFS_ROOT_IN_RADIX,
1014 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1015 BTRFS_ROOT_DEFRAG_RUNNING,
1016 BTRFS_ROOT_FORCE_COW,
1017 BTRFS_ROOT_MULTI_LOG_TASKS,
1019 BTRFS_ROOT_DELETING,
1022 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1024 * Set for the subvolume tree owning the reloc tree.
1026 BTRFS_ROOT_DEAD_RELOC_TREE,
1027 /* Mark dead root stored on device whose cleanup needs to be resumed */
1028 BTRFS_ROOT_DEAD_TREE,
1029 /* The root has a log tree. Used only for subvolume roots. */
1030 BTRFS_ROOT_HAS_LOG_TREE,
1031 /* Qgroup flushing is in progress */
1032 BTRFS_ROOT_QGROUP_FLUSHING,
1036 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1037 * code. For detail check comment in fs/btrfs/qgroup.c.
1039 struct btrfs_qgroup_swapped_blocks {
1041 /* RM_EMPTY_ROOT() of above blocks[] */
1043 struct rb_root blocks[BTRFS_MAX_LEVEL];
1047 * in ram representation of the tree. extent_root is used for all allocations
1048 * and for the extent tree extent_root root.
1051 struct extent_buffer *node;
1053 struct extent_buffer *commit_root;
1054 struct btrfs_root *log_root;
1055 struct btrfs_root *reloc_root;
1057 unsigned long state;
1058 struct btrfs_root_item root_item;
1059 struct btrfs_key root_key;
1060 struct btrfs_fs_info *fs_info;
1061 struct extent_io_tree dirty_log_pages;
1063 struct mutex objectid_mutex;
1065 spinlock_t accounting_lock;
1066 struct btrfs_block_rsv *block_rsv;
1068 /* free ino cache stuff */
1069 struct btrfs_free_space_ctl *free_ino_ctl;
1070 enum btrfs_caching_type ino_cache_state;
1071 spinlock_t ino_cache_lock;
1072 wait_queue_head_t ino_cache_wait;
1073 struct btrfs_free_space_ctl *free_ino_pinned;
1074 u64 ino_cache_progress;
1075 struct inode *ino_cache_inode;
1077 struct mutex log_mutex;
1078 wait_queue_head_t log_writer_wait;
1079 wait_queue_head_t log_commit_wait[2];
1080 struct list_head log_ctxs[2];
1081 /* Used only for log trees of subvolumes, not for the log root tree */
1082 atomic_t log_writers;
1083 atomic_t log_commit[2];
1084 /* Used only for log trees of subvolumes, not for the log root tree */
1087 /* No matter the commit succeeds or not*/
1088 int log_transid_committed;
1089 /* Just be updated when the commit succeeds. */
1090 int last_log_commit;
1091 pid_t log_start_pid;
1097 u64 highest_objectid;
1099 struct btrfs_key defrag_progress;
1100 struct btrfs_key defrag_max;
1102 /* The dirty list is only used by non-shareable roots */
1103 struct list_head dirty_list;
1105 struct list_head root_list;
1107 spinlock_t log_extents_lock[2];
1108 struct list_head logged_list[2];
1110 int orphan_cleanup_state;
1112 spinlock_t inode_lock;
1113 /* red-black tree that keeps track of in-memory inodes */
1114 struct rb_root inode_tree;
1117 * radix tree that keeps track of delayed nodes of every inode,
1118 * protected by inode_lock
1120 struct radix_tree_root delayed_nodes_tree;
1122 * right now this just gets used so that a root has its own devid
1123 * for stat. It may be used for more later
1127 spinlock_t root_item_lock;
1130 struct mutex delalloc_mutex;
1131 spinlock_t delalloc_lock;
1133 * all of the inodes that have delalloc bytes. It is possible for
1134 * this list to be empty even when there is still dirty data=ordered
1135 * extents waiting to finish IO.
1137 struct list_head delalloc_inodes;
1138 struct list_head delalloc_root;
1139 u64 nr_delalloc_inodes;
1141 struct mutex ordered_extent_mutex;
1143 * this is used by the balancing code to wait for all the pending
1146 spinlock_t ordered_extent_lock;
1149 * all of the data=ordered extents pending writeback
1150 * these can span multiple transactions and basically include
1151 * every dirty data page that isn't from nodatacow
1153 struct list_head ordered_extents;
1154 struct list_head ordered_root;
1155 u64 nr_ordered_extents;
1158 * Not empty if this subvolume root has gone through tree block swap
1161 * Will be used by reloc_control::dirty_subvol_roots.
1163 struct list_head reloc_dirty_list;
1166 * Number of currently running SEND ioctls to prevent
1167 * manipulation with the read-only status via SUBVOL_SETFLAGS
1169 int send_in_progress;
1171 * Number of currently running deduplication operations that have a
1172 * destination inode belonging to this root. Protected by the lock
1175 int dedupe_in_progress;
1176 /* For exclusion of snapshot creation and nocow writes */
1177 struct btrfs_drew_lock snapshot_lock;
1179 atomic_t snapshot_force_cow;
1181 /* For qgroup metadata reserved space */
1182 spinlock_t qgroup_meta_rsv_lock;
1183 u64 qgroup_meta_rsv_pertrans;
1184 u64 qgroup_meta_rsv_prealloc;
1185 wait_queue_head_t qgroup_flush_wait;
1187 /* Number of active swapfiles */
1188 atomic_t nr_swapfiles;
1190 /* Record pairs of swapped blocks for qgroup */
1191 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1193 /* Used only by log trees, when logging csum items */
1194 struct extent_io_tree log_csum_range;
1196 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1200 #ifdef CONFIG_BTRFS_DEBUG
1201 struct list_head leak_list;
1206 * Structure that conveys information about an extent that is going to replace
1207 * all the extents in a file range.
1209 struct btrfs_replace_extent_info {
1215 /* Pointer to a file extent item of type regular or prealloc. */
1218 * Set to true when attempting to replace a file range with a new extent
1219 * described by this structure, set to false when attempting to clone an
1220 * existing extent into a file range.
1223 /* Meaningful only if is_new_extent is true. */
1224 int qgroup_reserved;
1226 * Meaningful only if is_new_extent is true.
1227 * Used to track how many extent items we have already inserted in a
1228 * subvolume tree that refer to the extent described by this structure,
1229 * so that we know when to create a new delayed ref or update an existing
1235 struct btrfs_file_private {
1240 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1243 return info->nodesize - sizeof(struct btrfs_header);
1246 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1248 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1250 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1253 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1255 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1258 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1259 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1260 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1262 return BTRFS_MAX_ITEM_SIZE(info) -
1263 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1266 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1268 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1272 * Flags for mount options.
1274 * Note: don't forget to add new options to btrfs_show_options()
1276 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1277 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1278 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1279 #define BTRFS_MOUNT_SSD (1 << 3)
1280 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1281 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1282 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1283 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1284 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1285 #define BTRFS_MOUNT_NOSSD (1 << 9)
1286 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1287 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1288 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1289 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1290 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1291 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1292 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1293 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
1294 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1295 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1296 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1297 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1298 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1299 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1300 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1301 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1302 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1303 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1304 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1305 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1306 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30)
1307 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31)
1309 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1310 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1312 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1313 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1314 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1315 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1318 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1320 if (!btrfs_test_opt(fs_info, opt)) \
1321 btrfs_info(fs_info, fmt, ##args); \
1322 btrfs_set_opt(fs_info->mount_opt, opt); \
1325 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1327 if (btrfs_test_opt(fs_info, opt)) \
1328 btrfs_info(fs_info, fmt, ##args); \
1329 btrfs_clear_opt(fs_info->mount_opt, opt); \
1333 * Requests for changes that need to be done during transaction commit.
1335 * Internal mount options that are used for special handling of the real
1336 * mount options (eg. cannot be set during remount and have to be set during
1337 * transaction commit)
1340 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0)
1341 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1)
1342 #define BTRFS_PENDING_COMMIT (2)
1344 #define btrfs_test_pending(info, opt) \
1345 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1346 #define btrfs_set_pending(info, opt) \
1347 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1348 #define btrfs_clear_pending(info, opt) \
1349 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1352 * Helpers for setting pending mount option changes.
1354 * Expects corresponding macros
1355 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1357 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1359 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1360 btrfs_info((info), fmt, ##args); \
1361 btrfs_set_pending((info), SET_##opt); \
1362 btrfs_clear_pending((info), CLEAR_##opt); \
1366 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1368 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1369 btrfs_info((info), fmt, ##args); \
1370 btrfs_set_pending((info), CLEAR_##opt); \
1371 btrfs_clear_pending((info), SET_##opt); \
1378 #define BTRFS_INODE_NODATASUM (1 << 0)
1379 #define BTRFS_INODE_NODATACOW (1 << 1)
1380 #define BTRFS_INODE_READONLY (1 << 2)
1381 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1382 #define BTRFS_INODE_PREALLOC (1 << 4)
1383 #define BTRFS_INODE_SYNC (1 << 5)
1384 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1385 #define BTRFS_INODE_APPEND (1 << 7)
1386 #define BTRFS_INODE_NODUMP (1 << 8)
1387 #define BTRFS_INODE_NOATIME (1 << 9)
1388 #define BTRFS_INODE_DIRSYNC (1 << 10)
1389 #define BTRFS_INODE_COMPRESS (1 << 11)
1391 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1393 #define BTRFS_INODE_FLAG_MASK \
1394 (BTRFS_INODE_NODATASUM | \
1395 BTRFS_INODE_NODATACOW | \
1396 BTRFS_INODE_READONLY | \
1397 BTRFS_INODE_NOCOMPRESS | \
1398 BTRFS_INODE_PREALLOC | \
1399 BTRFS_INODE_SYNC | \
1400 BTRFS_INODE_IMMUTABLE | \
1401 BTRFS_INODE_APPEND | \
1402 BTRFS_INODE_NODUMP | \
1403 BTRFS_INODE_NOATIME | \
1404 BTRFS_INODE_DIRSYNC | \
1405 BTRFS_INODE_COMPRESS | \
1406 BTRFS_INODE_ROOT_ITEM_INIT)
1408 struct btrfs_map_token {
1409 struct extent_buffer *eb;
1411 unsigned long offset;
1414 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1415 ((bytes) >> (fs_info)->sectorsize_bits)
1417 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1418 struct extent_buffer *eb)
1421 token->kaddr = page_address(eb->pages[0]);
1425 /* some macros to generate set/get functions for the struct fields. This
1426 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1429 #define le8_to_cpu(v) (v)
1430 #define cpu_to_le8(v) (v)
1433 static inline u8 get_unaligned_le8(const void *p)
1438 static inline void put_unaligned_le8(u8 val, void *p)
1443 #define read_eb_member(eb, ptr, type, member, result) (\
1444 read_extent_buffer(eb, (char *)(result), \
1445 ((unsigned long)(ptr)) + \
1446 offsetof(type, member), \
1447 sizeof(((type *)0)->member)))
1449 #define write_eb_member(eb, ptr, type, member, result) (\
1450 write_extent_buffer(eb, (char *)(result), \
1451 ((unsigned long)(ptr)) + \
1452 offsetof(type, member), \
1453 sizeof(((type *)0)->member)))
1455 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1456 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1457 const void *ptr, unsigned long off); \
1458 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1459 const void *ptr, unsigned long off, \
1461 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1462 const void *ptr, unsigned long off); \
1463 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1464 unsigned long off, u##bits val);
1466 DECLARE_BTRFS_SETGET_BITS(8)
1467 DECLARE_BTRFS_SETGET_BITS(16)
1468 DECLARE_BTRFS_SETGET_BITS(32)
1469 DECLARE_BTRFS_SETGET_BITS(64)
1471 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1472 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1475 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1476 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1478 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1481 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1482 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1484 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1487 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1488 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1490 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1491 type *s, u##bits val) \
1493 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1494 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1497 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1498 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1500 const type *p = page_address(eb->pages[0]); \
1501 return get_unaligned_le##bits(&p->member); \
1503 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1506 type *p = page_address(eb->pages[0]); \
1507 put_unaligned_le##bits(val, &p->member); \
1510 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1511 static inline u##bits btrfs_##name(const type *s) \
1513 return get_unaligned_le##bits(&s->member); \
1515 static inline void btrfs_set_##name(type *s, u##bits val) \
1517 put_unaligned_le##bits(val, &s->member); \
1520 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1521 struct btrfs_dev_item *s)
1523 BUILD_BUG_ON(sizeof(u64) !=
1524 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1525 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1528 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1529 struct btrfs_dev_item *s,
1532 BUILD_BUG_ON(sizeof(u64) !=
1533 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1534 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1535 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1539 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1540 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1541 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1542 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1543 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1545 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1546 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1547 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1548 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1549 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1550 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1552 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1553 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1555 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1557 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1559 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1561 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1563 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1564 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1566 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1568 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1570 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1573 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1575 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1578 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1580 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1583 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1584 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1585 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1586 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1587 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1588 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1589 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1590 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1591 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1592 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1593 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1595 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1597 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1600 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1601 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1602 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1604 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1606 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1608 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1610 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1611 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1613 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1615 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1618 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1621 unsigned long offset = (unsigned long)c;
1622 offset += offsetof(struct btrfs_chunk, stripe);
1623 offset += nr * sizeof(struct btrfs_stripe);
1624 return (struct btrfs_stripe *)offset;
1627 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1629 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1632 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1633 struct btrfs_chunk *c, int nr)
1635 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1638 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1639 struct btrfs_chunk *c, int nr)
1641 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1644 /* struct btrfs_block_group_item */
1645 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1647 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1649 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1650 struct btrfs_block_group_item, chunk_objectid, 64);
1652 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1653 struct btrfs_block_group_item, chunk_objectid, 64);
1654 BTRFS_SETGET_FUNCS(block_group_flags,
1655 struct btrfs_block_group_item, flags, 64);
1656 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1657 struct btrfs_block_group_item, flags, 64);
1659 /* struct btrfs_free_space_info */
1660 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1662 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1664 /* struct btrfs_inode_ref */
1665 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1666 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1668 /* struct btrfs_inode_extref */
1669 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1670 parent_objectid, 64);
1671 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1673 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1675 /* struct btrfs_inode_item */
1676 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1677 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1678 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1679 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1680 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1681 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1682 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1683 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1684 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1685 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1686 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1687 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1688 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1690 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1692 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1694 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1695 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1697 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1699 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1700 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1701 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1702 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1703 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1704 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1705 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1706 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1707 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1708 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1710 /* struct btrfs_dev_extent */
1711 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1713 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1714 chunk_objectid, 64);
1715 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1717 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1718 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1719 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1721 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1723 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1725 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1726 struct btrfs_tree_block_info *item,
1727 struct btrfs_disk_key *key)
1729 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1732 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1733 struct btrfs_tree_block_info *item,
1734 struct btrfs_disk_key *key)
1736 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1739 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1741 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1743 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1745 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1748 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1751 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1753 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1756 static inline u32 btrfs_extent_inline_ref_size(int type)
1758 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1759 type == BTRFS_SHARED_BLOCK_REF_KEY)
1760 return sizeof(struct btrfs_extent_inline_ref);
1761 if (type == BTRFS_SHARED_DATA_REF_KEY)
1762 return sizeof(struct btrfs_shared_data_ref) +
1763 sizeof(struct btrfs_extent_inline_ref);
1764 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1765 return sizeof(struct btrfs_extent_data_ref) +
1766 offsetof(struct btrfs_extent_inline_ref, offset);
1770 /* struct btrfs_node */
1771 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1772 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1773 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1775 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1778 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1781 ptr = offsetof(struct btrfs_node, ptrs) +
1782 sizeof(struct btrfs_key_ptr) * nr;
1783 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1786 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1790 ptr = offsetof(struct btrfs_node, ptrs) +
1791 sizeof(struct btrfs_key_ptr) * nr;
1792 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1795 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1798 ptr = offsetof(struct btrfs_node, ptrs) +
1799 sizeof(struct btrfs_key_ptr) * nr;
1800 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1803 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1807 ptr = offsetof(struct btrfs_node, ptrs) +
1808 sizeof(struct btrfs_key_ptr) * nr;
1809 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1812 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1814 return offsetof(struct btrfs_node, ptrs) +
1815 sizeof(struct btrfs_key_ptr) * nr;
1818 void btrfs_node_key(const struct extent_buffer *eb,
1819 struct btrfs_disk_key *disk_key, int nr);
1821 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1822 struct btrfs_disk_key *disk_key, int nr)
1825 ptr = btrfs_node_key_ptr_offset(nr);
1826 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1827 struct btrfs_key_ptr, key, disk_key);
1830 /* struct btrfs_item */
1831 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1832 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1833 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1834 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1836 static inline unsigned long btrfs_item_nr_offset(int nr)
1838 return offsetof(struct btrfs_leaf, items) +
1839 sizeof(struct btrfs_item) * nr;
1842 static inline struct btrfs_item *btrfs_item_nr(int nr)
1844 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1847 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1848 struct btrfs_item *item)
1850 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1853 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1855 return btrfs_item_end(eb, btrfs_item_nr(nr));
1858 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1860 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1863 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1865 return btrfs_item_size(eb, btrfs_item_nr(nr));
1868 static inline void btrfs_item_key(const struct extent_buffer *eb,
1869 struct btrfs_disk_key *disk_key, int nr)
1871 struct btrfs_item *item = btrfs_item_nr(nr);
1872 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1875 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1876 struct btrfs_disk_key *disk_key, int nr)
1878 struct btrfs_item *item = btrfs_item_nr(nr);
1879 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1882 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1885 * struct btrfs_root_ref
1887 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1888 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1889 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1891 /* struct btrfs_dir_item */
1892 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1893 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1894 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1895 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1896 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1897 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1899 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1901 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1904 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1905 const struct btrfs_dir_item *item,
1906 struct btrfs_disk_key *key)
1908 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1911 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1912 struct btrfs_dir_item *item,
1913 const struct btrfs_disk_key *key)
1915 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1918 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1920 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1922 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1925 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1926 const struct btrfs_free_space_header *h,
1927 struct btrfs_disk_key *key)
1929 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1932 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1933 struct btrfs_free_space_header *h,
1934 const struct btrfs_disk_key *key)
1936 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1939 /* struct btrfs_disk_key */
1940 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1942 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1943 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1945 #ifdef __LITTLE_ENDIAN
1948 * Optimized helpers for little-endian architectures where CPU and on-disk
1949 * structures have the same endianness and we can skip conversions.
1952 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
1953 const struct btrfs_disk_key *disk_key)
1955 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
1958 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
1959 const struct btrfs_key *cpu_key)
1961 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
1964 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
1965 struct btrfs_key *cpu_key, int nr)
1967 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1969 btrfs_node_key(eb, disk_key, nr);
1972 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
1973 struct btrfs_key *cpu_key, int nr)
1975 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1977 btrfs_item_key(eb, disk_key, nr);
1980 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
1981 const struct btrfs_dir_item *item,
1982 struct btrfs_key *cpu_key)
1984 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
1986 btrfs_dir_item_key(eb, item, disk_key);
1991 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1992 const struct btrfs_disk_key *disk)
1994 cpu->offset = le64_to_cpu(disk->offset);
1995 cpu->type = disk->type;
1996 cpu->objectid = le64_to_cpu(disk->objectid);
1999 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2000 const struct btrfs_key *cpu)
2002 disk->offset = cpu_to_le64(cpu->offset);
2003 disk->type = cpu->type;
2004 disk->objectid = cpu_to_le64(cpu->objectid);
2007 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2008 struct btrfs_key *key, int nr)
2010 struct btrfs_disk_key disk_key;
2011 btrfs_node_key(eb, &disk_key, nr);
2012 btrfs_disk_key_to_cpu(key, &disk_key);
2015 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2016 struct btrfs_key *key, int nr)
2018 struct btrfs_disk_key disk_key;
2019 btrfs_item_key(eb, &disk_key, nr);
2020 btrfs_disk_key_to_cpu(key, &disk_key);
2023 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2024 const struct btrfs_dir_item *item,
2025 struct btrfs_key *key)
2027 struct btrfs_disk_key disk_key;
2028 btrfs_dir_item_key(eb, item, &disk_key);
2029 btrfs_disk_key_to_cpu(key, &disk_key);
2034 /* struct btrfs_header */
2035 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2036 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2038 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2039 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2040 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2041 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2042 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2044 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2045 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2047 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2049 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2051 return (btrfs_header_flags(eb) & flag) == flag;
2054 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2056 u64 flags = btrfs_header_flags(eb);
2057 btrfs_set_header_flags(eb, flags | flag);
2060 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2062 u64 flags = btrfs_header_flags(eb);
2063 btrfs_set_header_flags(eb, flags & ~flag);
2066 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2068 u64 flags = btrfs_header_flags(eb);
2069 return flags >> BTRFS_BACKREF_REV_SHIFT;
2072 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2075 u64 flags = btrfs_header_flags(eb);
2076 flags &= ~BTRFS_BACKREF_REV_MASK;
2077 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2078 btrfs_set_header_flags(eb, flags);
2081 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2083 return btrfs_header_level(eb) == 0;
2086 /* struct btrfs_root_item */
2087 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2089 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2090 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2091 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2093 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2095 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2096 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
2097 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2098 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2099 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2100 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2101 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2102 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2103 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2105 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2107 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2109 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2111 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2113 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2116 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2118 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2121 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2123 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2126 /* struct btrfs_root_backup */
2127 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2129 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2131 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2132 tree_root_level, 8);
2134 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2136 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2137 chunk_root_gen, 64);
2138 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2139 chunk_root_level, 8);
2141 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2143 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2144 extent_root_gen, 64);
2145 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2146 extent_root_level, 8);
2148 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2150 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2152 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2155 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2157 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2159 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2162 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2164 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2166 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2167 csum_root_level, 8);
2168 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2170 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2172 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2175 /* struct btrfs_balance_item */
2176 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2178 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2179 const struct btrfs_balance_item *bi,
2180 struct btrfs_disk_balance_args *ba)
2182 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2185 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2186 struct btrfs_balance_item *bi,
2187 const struct btrfs_disk_balance_args *ba)
2189 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2192 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2193 const struct btrfs_balance_item *bi,
2194 struct btrfs_disk_balance_args *ba)
2196 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2199 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2200 struct btrfs_balance_item *bi,
2201 const struct btrfs_disk_balance_args *ba)
2203 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2206 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2207 const struct btrfs_balance_item *bi,
2208 struct btrfs_disk_balance_args *ba)
2210 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2213 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2214 struct btrfs_balance_item *bi,
2215 const struct btrfs_disk_balance_args *ba)
2217 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2221 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2222 const struct btrfs_disk_balance_args *disk)
2224 memset(cpu, 0, sizeof(*cpu));
2226 cpu->profiles = le64_to_cpu(disk->profiles);
2227 cpu->usage = le64_to_cpu(disk->usage);
2228 cpu->devid = le64_to_cpu(disk->devid);
2229 cpu->pstart = le64_to_cpu(disk->pstart);
2230 cpu->pend = le64_to_cpu(disk->pend);
2231 cpu->vstart = le64_to_cpu(disk->vstart);
2232 cpu->vend = le64_to_cpu(disk->vend);
2233 cpu->target = le64_to_cpu(disk->target);
2234 cpu->flags = le64_to_cpu(disk->flags);
2235 cpu->limit = le64_to_cpu(disk->limit);
2236 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2237 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2241 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2242 const struct btrfs_balance_args *cpu)
2244 memset(disk, 0, sizeof(*disk));
2246 disk->profiles = cpu_to_le64(cpu->profiles);
2247 disk->usage = cpu_to_le64(cpu->usage);
2248 disk->devid = cpu_to_le64(cpu->devid);
2249 disk->pstart = cpu_to_le64(cpu->pstart);
2250 disk->pend = cpu_to_le64(cpu->pend);
2251 disk->vstart = cpu_to_le64(cpu->vstart);
2252 disk->vend = cpu_to_le64(cpu->vend);
2253 disk->target = cpu_to_le64(cpu->target);
2254 disk->flags = cpu_to_le64(cpu->flags);
2255 disk->limit = cpu_to_le64(cpu->limit);
2256 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2257 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2260 /* struct btrfs_super_block */
2261 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2262 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2263 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2265 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2266 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2267 struct btrfs_super_block, sys_chunk_array_size, 32);
2268 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2269 struct btrfs_super_block, chunk_root_generation, 64);
2270 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2272 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2274 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2275 chunk_root_level, 8);
2276 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2278 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2279 log_root_transid, 64);
2280 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2282 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2284 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2286 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2288 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2290 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2292 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2293 root_dir_objectid, 64);
2294 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2296 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2298 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2299 compat_ro_flags, 64);
2300 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2301 incompat_flags, 64);
2302 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2304 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2305 cache_generation, 64);
2306 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2307 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2308 uuid_tree_generation, 64);
2310 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2311 const char *btrfs_super_csum_name(u16 csum_type);
2312 const char *btrfs_super_csum_driver(u16 csum_type);
2313 size_t __attribute_const__ btrfs_get_num_csums(void);
2317 * The leaf data grows from end-to-front in the node.
2318 * this returns the address of the start of the last item,
2319 * which is the stop of the leaf data stack
2321 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2323 u32 nr = btrfs_header_nritems(leaf);
2326 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2327 return btrfs_item_offset_nr(leaf, nr - 1);
2330 /* struct btrfs_file_extent_item */
2331 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2333 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2334 struct btrfs_file_extent_item, disk_bytenr, 64);
2335 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2336 struct btrfs_file_extent_item, offset, 64);
2337 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2338 struct btrfs_file_extent_item, generation, 64);
2339 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2340 struct btrfs_file_extent_item, num_bytes, 64);
2341 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2342 struct btrfs_file_extent_item, ram_bytes, 64);
2343 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2344 struct btrfs_file_extent_item, disk_num_bytes, 64);
2345 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2346 struct btrfs_file_extent_item, compression, 8);
2348 static inline unsigned long
2349 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2351 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2354 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2356 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2359 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2360 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2362 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2364 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2365 disk_num_bytes, 64);
2366 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2368 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2370 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2372 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2374 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2376 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2377 other_encoding, 16);
2380 * this returns the number of bytes used by the item on disk, minus the
2381 * size of any extent headers. If a file is compressed on disk, this is
2382 * the compressed size
2384 static inline u32 btrfs_file_extent_inline_item_len(
2385 const struct extent_buffer *eb,
2386 struct btrfs_item *e)
2388 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2391 /* btrfs_qgroup_status_item */
2392 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2394 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2396 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2398 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2401 /* btrfs_qgroup_info_item */
2402 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2404 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2405 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2407 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2408 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2411 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2412 struct btrfs_qgroup_info_item, generation, 64);
2413 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2415 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2416 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2417 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2419 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2420 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2422 /* btrfs_qgroup_limit_item */
2423 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2425 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2427 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2429 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2431 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2434 /* btrfs_dev_replace_item */
2435 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2436 struct btrfs_dev_replace_item, src_devid, 64);
2437 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2438 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2440 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2442 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2444 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2446 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2447 num_write_errors, 64);
2448 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2449 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2451 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2453 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2457 struct btrfs_dev_replace_item, src_devid, 64);
2458 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2459 struct btrfs_dev_replace_item,
2460 cont_reading_from_srcdev_mode, 64);
2461 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2462 struct btrfs_dev_replace_item, replace_state, 64);
2463 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2464 struct btrfs_dev_replace_item, time_started, 64);
2465 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2466 struct btrfs_dev_replace_item, time_stopped, 64);
2467 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2468 struct btrfs_dev_replace_item, num_write_errors, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2470 struct btrfs_dev_replace_item,
2471 num_uncorrectable_read_errors, 64);
2472 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2473 struct btrfs_dev_replace_item, cursor_left, 64);
2474 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2475 struct btrfs_dev_replace_item, cursor_right, 64);
2477 /* helper function to cast into the data area of the leaf. */
2478 #define btrfs_item_ptr(leaf, slot, type) \
2479 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2480 btrfs_item_offset_nr(leaf, slot)))
2482 #define btrfs_item_ptr_offset(leaf, slot) \
2483 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2484 btrfs_item_offset_nr(leaf, slot)))
2486 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2488 return crc32c(crc, address, length);
2491 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2493 put_unaligned_le32(~crc, result);
2496 static inline u64 btrfs_name_hash(const char *name, int len)
2498 return crc32c((u32)~1, name, len);
2502 * Figure the key offset of an extended inode ref
2504 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2507 return (u64) crc32c(parent_objectid, name, len);
2510 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2512 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2517 enum btrfs_inline_ref_type {
2518 BTRFS_REF_TYPE_INVALID,
2519 BTRFS_REF_TYPE_BLOCK,
2520 BTRFS_REF_TYPE_DATA,
2524 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2525 struct btrfs_extent_inline_ref *iref,
2526 enum btrfs_inline_ref_type is_data);
2527 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2530 * Take the number of bytes to be checksummmed and figure out how many leaves
2531 * it would require to store the csums for that many bytes.
2533 static inline u64 btrfs_csum_bytes_to_leaves(
2534 const struct btrfs_fs_info *fs_info, u64 csum_bytes)
2536 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
2538 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
2542 * Use this if we would be adding new items, as we could split nodes as we cow
2545 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2548 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2552 * Doing a truncate or a modification won't result in new nodes or leaves, just
2553 * what we need for COW.
2555 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2558 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2561 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2562 u64 start, u64 num_bytes);
2563 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2564 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2565 unsigned long count);
2566 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2567 struct btrfs_delayed_ref_root *delayed_refs,
2568 struct btrfs_delayed_ref_head *head);
2569 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2570 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2571 struct btrfs_fs_info *fs_info, u64 bytenr,
2572 u64 offset, int metadata, u64 *refs, u64 *flags);
2573 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2575 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2576 u64 bytenr, u64 num_bytes);
2577 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2578 int btrfs_cross_ref_exist(struct btrfs_root *root,
2579 u64 objectid, u64 offset, u64 bytenr, bool strict);
2580 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2581 struct btrfs_root *root,
2582 u64 parent, u64 root_objectid,
2583 const struct btrfs_disk_key *key,
2584 int level, u64 hint,
2586 enum btrfs_lock_nesting nest);
2587 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2588 struct btrfs_root *root,
2589 struct extent_buffer *buf,
2590 u64 parent, int last_ref);
2591 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2592 struct btrfs_root *root, u64 owner,
2593 u64 offset, u64 ram_bytes,
2594 struct btrfs_key *ins);
2595 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2596 u64 root_objectid, u64 owner, u64 offset,
2597 struct btrfs_key *ins);
2598 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2599 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2600 struct btrfs_key *ins, int is_data, int delalloc);
2601 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2602 struct extent_buffer *buf, int full_backref);
2603 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2604 struct extent_buffer *buf, int full_backref);
2605 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2606 struct extent_buffer *eb, u64 flags,
2607 int level, int is_data);
2608 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2610 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2611 u64 start, u64 len, int delalloc);
2612 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2614 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2615 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2616 struct btrfs_ref *generic_ref);
2618 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2619 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2622 * Different levels for to flush space when doing space reservations.
2624 * The higher the level, the more methods we try to reclaim space.
2626 enum btrfs_reserve_flush_enum {
2627 /* If we are in the transaction, we can't flush anything.*/
2628 BTRFS_RESERVE_NO_FLUSH,
2632 * - Running delayed inode items
2633 * - Allocating a new chunk
2635 BTRFS_RESERVE_FLUSH_LIMIT,
2639 * - Running delayed inode items
2640 * - Running delayed refs
2641 * - Running delalloc and waiting for ordered extents
2642 * - Allocating a new chunk
2644 BTRFS_RESERVE_FLUSH_EVICT,
2647 * Flush space by above mentioned methods and by:
2648 * - Running delayed iputs
2649 * - Commiting transaction
2651 * Can be interruped by fatal signal.
2653 BTRFS_RESERVE_FLUSH_DATA,
2654 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2655 BTRFS_RESERVE_FLUSH_ALL,
2658 * Pretty much the same as FLUSH_ALL, but can also steal space from
2661 * Can be interruped by fatal signal.
2663 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2666 enum btrfs_flush_state {
2667 FLUSH_DELAYED_ITEMS_NR = 1,
2668 FLUSH_DELAYED_ITEMS = 2,
2669 FLUSH_DELAYED_REFS_NR = 3,
2670 FLUSH_DELAYED_REFS = 4,
2672 FLUSH_DELALLOC_WAIT = 6,
2674 ALLOC_CHUNK_FORCE = 8,
2675 RUN_DELAYED_IPUTS = 9,
2679 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2680 struct btrfs_block_rsv *rsv,
2681 int nitems, bool use_global_rsv);
2682 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2683 struct btrfs_block_rsv *rsv);
2684 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2686 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2687 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2688 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2689 u64 start, u64 end);
2690 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2691 u64 num_bytes, u64 *actual_bytes);
2692 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2694 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2695 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2696 struct btrfs_fs_info *fs_info);
2697 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2698 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2699 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2702 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2704 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2705 int btrfs_previous_item(struct btrfs_root *root,
2706 struct btrfs_path *path, u64 min_objectid,
2708 int btrfs_previous_extent_item(struct btrfs_root *root,
2709 struct btrfs_path *path, u64 min_objectid);
2710 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2711 struct btrfs_path *path,
2712 const struct btrfs_key *new_key);
2713 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2714 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2715 struct btrfs_key *key, int lowest_level,
2717 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2718 struct btrfs_path *path,
2720 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2723 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2724 struct btrfs_root *root, struct extent_buffer *buf,
2725 struct extent_buffer *parent, int parent_slot,
2726 struct extent_buffer **cow_ret,
2727 enum btrfs_lock_nesting nest);
2728 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2729 struct btrfs_root *root,
2730 struct extent_buffer *buf,
2731 struct extent_buffer **cow_ret, u64 new_root_objectid);
2732 int btrfs_block_can_be_shared(struct btrfs_root *root,
2733 struct extent_buffer *buf);
2734 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2735 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2736 int btrfs_split_item(struct btrfs_trans_handle *trans,
2737 struct btrfs_root *root,
2738 struct btrfs_path *path,
2739 const struct btrfs_key *new_key,
2740 unsigned long split_offset);
2741 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root,
2743 struct btrfs_path *path,
2744 const struct btrfs_key *new_key);
2745 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2746 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2747 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2748 const struct btrfs_key *key, struct btrfs_path *p,
2749 int ins_len, int cow);
2750 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2751 struct btrfs_path *p, u64 time_seq);
2752 int btrfs_search_slot_for_read(struct btrfs_root *root,
2753 const struct btrfs_key *key,
2754 struct btrfs_path *p, int find_higher,
2756 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root, struct extent_buffer *parent,
2758 int start_slot, u64 *last_ret,
2759 struct btrfs_key *progress);
2760 void btrfs_release_path(struct btrfs_path *p);
2761 struct btrfs_path *btrfs_alloc_path(void);
2762 void btrfs_free_path(struct btrfs_path *p);
2764 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2765 struct btrfs_path *path, int slot, int nr);
2766 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2767 struct btrfs_root *root,
2768 struct btrfs_path *path)
2770 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2773 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2774 const struct btrfs_key *cpu_key, u32 *data_size,
2776 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2777 const struct btrfs_key *key, void *data, u32 data_size);
2778 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2779 struct btrfs_root *root,
2780 struct btrfs_path *path,
2781 const struct btrfs_key *cpu_key, u32 *data_size,
2784 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2785 struct btrfs_root *root,
2786 struct btrfs_path *path,
2787 const struct btrfs_key *key,
2790 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2793 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2794 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2795 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2797 static inline int btrfs_next_old_item(struct btrfs_root *root,
2798 struct btrfs_path *p, u64 time_seq)
2801 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2802 return btrfs_next_old_leaf(root, p, time_seq);
2805 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2807 return btrfs_next_old_item(root, p, 0);
2809 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2810 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2812 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2813 struct btrfs_root *root,
2814 struct extent_buffer *node,
2815 struct extent_buffer *parent);
2816 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2819 * Do it this way so we only ever do one test_bit in the normal case.
2821 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2822 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2830 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2831 * anything except sleeping. This function is used to check the status of
2834 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2836 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2839 /* tree mod log functions from ctree.c */
2840 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2841 struct seq_list *elem);
2842 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2843 struct seq_list *elem);
2844 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2847 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2848 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2850 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2851 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2853 int btrfs_del_root(struct btrfs_trans_handle *trans,
2854 const struct btrfs_key *key);
2855 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2856 const struct btrfs_key *key,
2857 struct btrfs_root_item *item);
2858 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2859 struct btrfs_root *root,
2860 struct btrfs_key *key,
2861 struct btrfs_root_item *item);
2862 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2863 struct btrfs_path *path, struct btrfs_root_item *root_item,
2864 struct btrfs_key *root_key);
2865 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2866 void btrfs_set_root_node(struct btrfs_root_item *item,
2867 struct extent_buffer *node);
2868 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2869 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2870 struct btrfs_root *root);
2873 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2875 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2877 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2880 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2881 const char *name, int name_len);
2882 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2883 int name_len, struct btrfs_inode *dir,
2884 struct btrfs_key *location, u8 type, u64 index);
2885 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2886 struct btrfs_root *root,
2887 struct btrfs_path *path, u64 dir,
2888 const char *name, int name_len,
2890 struct btrfs_dir_item *
2891 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2892 struct btrfs_root *root,
2893 struct btrfs_path *path, u64 dir,
2894 u64 objectid, const char *name, int name_len,
2896 struct btrfs_dir_item *
2897 btrfs_search_dir_index_item(struct btrfs_root *root,
2898 struct btrfs_path *path, u64 dirid,
2899 const char *name, int name_len);
2900 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2901 struct btrfs_root *root,
2902 struct btrfs_path *path,
2903 struct btrfs_dir_item *di);
2904 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2905 struct btrfs_root *root,
2906 struct btrfs_path *path, u64 objectid,
2907 const char *name, u16 name_len,
2908 const void *data, u16 data_len);
2909 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2910 struct btrfs_root *root,
2911 struct btrfs_path *path, u64 dir,
2912 const char *name, u16 name_len,
2914 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2915 struct btrfs_path *path,
2920 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2921 struct btrfs_root *root, u64 offset);
2922 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2923 struct btrfs_root *root, u64 offset);
2924 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2927 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2928 struct btrfs_root *root,
2929 const char *name, int name_len,
2930 u64 inode_objectid, u64 ref_objectid, u64 index);
2931 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2932 struct btrfs_root *root,
2933 const char *name, int name_len,
2934 u64 inode_objectid, u64 ref_objectid, u64 *index);
2935 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2936 struct btrfs_root *root,
2937 struct btrfs_path *path, u64 objectid);
2938 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2939 *root, struct btrfs_path *path,
2940 struct btrfs_key *location, int mod);
2942 struct btrfs_inode_extref *
2943 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
2944 struct btrfs_root *root,
2945 struct btrfs_path *path,
2946 const char *name, int name_len,
2947 u64 inode_objectid, u64 ref_objectid, int ins_len,
2950 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
2951 int slot, const char *name,
2953 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
2954 struct extent_buffer *leaf, int slot, u64 ref_objectid,
2955 const char *name, int name_len);
2957 struct btrfs_dio_private;
2958 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2959 struct btrfs_root *root, u64 bytenr, u64 len);
2960 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
2961 u64 offset, u8 *dst);
2962 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2963 struct btrfs_root *root,
2964 u64 objectid, u64 pos,
2965 u64 disk_offset, u64 disk_num_bytes,
2966 u64 num_bytes, u64 offset, u64 ram_bytes,
2967 u8 compression, u8 encryption, u16 other_encoding);
2968 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2969 struct btrfs_root *root,
2970 struct btrfs_path *path, u64 objectid,
2971 u64 bytenr, int mod);
2972 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2973 struct btrfs_root *root,
2974 struct btrfs_ordered_sum *sums);
2975 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
2976 u64 file_start, int contig);
2977 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
2978 struct list_head *list, int search_commit);
2979 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
2980 const struct btrfs_path *path,
2981 struct btrfs_file_extent_item *fi,
2982 const bool new_inline,
2983 struct extent_map *em);
2984 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
2986 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
2988 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size);
2989 u64 btrfs_file_extent_end(const struct btrfs_path *path);
2992 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
2993 int mirror_num, unsigned long bio_flags);
2994 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u64 phy_offset,
2995 struct page *page, u64 start, u64 end, int mirror);
2996 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
2997 u64 start, u64 len);
2998 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
2999 u64 *orig_start, u64 *orig_block_len,
3000 u64 *ram_bytes, bool strict);
3002 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3003 struct btrfs_inode *inode);
3004 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3005 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3006 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3007 struct btrfs_root *root,
3008 struct btrfs_inode *dir, struct btrfs_inode *inode,
3009 const char *name, int name_len);
3010 int btrfs_add_link(struct btrfs_trans_handle *trans,
3011 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3012 const char *name, int name_len, int add_backref, u64 index);
3013 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3014 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
3016 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3017 struct btrfs_root *root,
3018 struct inode *inode, u64 new_size,
3021 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3022 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr);
3023 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
3024 unsigned int extra_bits,
3025 struct extent_state **cached_state);
3026 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3027 struct btrfs_root *new_root,
3028 struct btrfs_root *parent_root,
3030 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3032 void btrfs_clear_delalloc_extent(struct inode *inode,
3033 struct extent_state *state, unsigned *bits);
3034 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3035 struct extent_state *other);
3036 void btrfs_split_delalloc_extent(struct inode *inode,
3037 struct extent_state *orig, u64 split);
3038 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3039 unsigned long bio_flags);
3040 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3041 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3042 int btrfs_readpage(struct file *file, struct page *page);
3043 void btrfs_evict_inode(struct inode *inode);
3044 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3045 struct inode *btrfs_alloc_inode(struct super_block *sb);
3046 void btrfs_destroy_inode(struct inode *inode);
3047 void btrfs_free_inode(struct inode *inode);
3048 int btrfs_drop_inode(struct inode *inode);
3049 int __init btrfs_init_cachep(void);
3050 void __cold btrfs_destroy_cachep(void);
3051 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3052 struct btrfs_root *root, struct btrfs_path *path);
3053 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3054 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3055 struct page *page, size_t pg_offset,
3056 u64 start, u64 end);
3057 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3058 struct btrfs_root *root,
3059 struct inode *inode);
3060 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3061 struct btrfs_root *root, struct inode *inode);
3062 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3063 struct btrfs_inode *inode);
3064 int btrfs_orphan_cleanup(struct btrfs_root *root);
3065 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3066 void btrfs_add_delayed_iput(struct inode *inode);
3067 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3068 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3069 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3070 u64 start, u64 num_bytes, u64 min_size,
3071 loff_t actual_len, u64 *alloc_hint);
3072 int btrfs_prealloc_file_range_trans(struct inode *inode,
3073 struct btrfs_trans_handle *trans, int mode,
3074 u64 start, u64 num_bytes, u64 min_size,
3075 loff_t actual_len, u64 *alloc_hint);
3076 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3077 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3078 struct writeback_control *wbc);
3079 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3080 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3081 u64 end, int uptodate);
3082 extern const struct dentry_operations btrfs_dentry_operations;
3083 extern const struct iomap_ops btrfs_dio_iomap_ops;
3084 extern const struct iomap_dio_ops btrfs_dio_ops;
3086 /* Inode locking type flags, by default the exclusive lock is taken */
3087 #define BTRFS_ILOCK_SHARED (1U << 0)
3088 #define BTRFS_ILOCK_TRY (1U << 1)
3090 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags);
3091 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags);
3094 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3095 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3096 int btrfs_ioctl_get_supported_features(void __user *arg);
3097 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3098 int __pure btrfs_is_empty_uuid(u8 *uuid);
3099 int btrfs_defrag_file(struct inode *inode, struct file *file,
3100 struct btrfs_ioctl_defrag_range_args *range,
3101 u64 newer_than, unsigned long max_pages);
3102 void btrfs_get_block_group_info(struct list_head *groups_list,
3103 struct btrfs_ioctl_space_info *space);
3104 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3105 struct btrfs_ioctl_balance_args *bargs);
3106 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3107 enum btrfs_exclusive_operation type);
3108 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3111 int __init btrfs_auto_defrag_init(void);
3112 void __cold btrfs_auto_defrag_exit(void);
3113 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3114 struct btrfs_inode *inode);
3115 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3116 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3117 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3118 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3120 extern const struct file_operations btrfs_file_operations;
3121 int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
3122 struct btrfs_root *root, struct btrfs_inode *inode,
3123 struct btrfs_path *path, u64 start, u64 end,
3124 u64 *drop_end, int drop_cache,
3126 u32 extent_item_size,
3128 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3129 struct btrfs_root *root, struct inode *inode, u64 start,
3130 u64 end, int drop_cache);
3131 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path,
3132 const u64 start, const u64 end,
3133 struct btrfs_replace_extent_info *extent_info,
3134 struct btrfs_trans_handle **trans_out);
3135 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3136 struct btrfs_inode *inode, u64 start, u64 end);
3137 int btrfs_release_file(struct inode *inode, struct file *file);
3138 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3139 size_t num_pages, loff_t pos, size_t write_bytes,
3140 struct extent_state **cached, bool noreserve);
3141 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3142 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3143 size_t *write_bytes);
3144 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3147 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3148 struct btrfs_root *root);
3151 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3152 unsigned long new_flags);
3153 int btrfs_sync_fs(struct super_block *sb, int wait);
3154 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3155 u64 subvol_objectid);
3157 static inline __printf(2, 3) __cold
3158 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3162 #ifdef CONFIG_PRINTK
3165 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3167 #define btrfs_printk(fs_info, fmt, args...) \
3168 btrfs_no_printk(fs_info, fmt, ##args)
3171 #define btrfs_emerg(fs_info, fmt, args...) \
3172 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3173 #define btrfs_alert(fs_info, fmt, args...) \
3174 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3175 #define btrfs_crit(fs_info, fmt, args...) \
3176 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3177 #define btrfs_err(fs_info, fmt, args...) \
3178 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3179 #define btrfs_warn(fs_info, fmt, args...) \
3180 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3181 #define btrfs_notice(fs_info, fmt, args...) \
3182 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3183 #define btrfs_info(fs_info, fmt, args...) \
3184 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3187 * Wrappers that use printk_in_rcu
3189 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3190 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3191 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3192 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3193 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3194 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3195 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3196 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3197 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3198 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3199 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3200 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3201 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3202 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3205 * Wrappers that use a ratelimited printk_in_rcu
3207 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3208 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3209 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3210 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3211 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3212 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3213 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3214 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3215 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3216 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3217 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3218 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3219 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3220 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3223 * Wrappers that use a ratelimited printk
3225 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3226 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3227 #define btrfs_alert_rl(fs_info, fmt, args...) \
3228 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3229 #define btrfs_crit_rl(fs_info, fmt, args...) \
3230 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3231 #define btrfs_err_rl(fs_info, fmt, args...) \
3232 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3233 #define btrfs_warn_rl(fs_info, fmt, args...) \
3234 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3235 #define btrfs_notice_rl(fs_info, fmt, args...) \
3236 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3237 #define btrfs_info_rl(fs_info, fmt, args...) \
3238 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3240 #if defined(CONFIG_DYNAMIC_DEBUG)
3241 #define btrfs_debug(fs_info, fmt, args...) \
3242 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3243 fs_info, KERN_DEBUG fmt, ##args)
3244 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3245 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3246 fs_info, KERN_DEBUG fmt, ##args)
3247 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3248 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3249 fs_info, KERN_DEBUG fmt, ##args)
3250 #define btrfs_debug_rl(fs_info, fmt, args...) \
3251 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3252 fs_info, KERN_DEBUG fmt, ##args)
3253 #elif defined(DEBUG)
3254 #define btrfs_debug(fs_info, fmt, args...) \
3255 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3256 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3257 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3258 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3259 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3260 #define btrfs_debug_rl(fs_info, fmt, args...) \
3261 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3263 #define btrfs_debug(fs_info, fmt, args...) \
3264 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3265 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3266 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3267 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3268 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3269 #define btrfs_debug_rl(fs_info, fmt, args...) \
3270 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3273 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3276 btrfs_printk(fs_info, fmt, ##args); \
3277 rcu_read_unlock(); \
3280 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3283 btrfs_no_printk(fs_info, fmt, ##args); \
3284 rcu_read_unlock(); \
3287 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3289 static DEFINE_RATELIMIT_STATE(_rs, \
3290 DEFAULT_RATELIMIT_INTERVAL, \
3291 DEFAULT_RATELIMIT_BURST); \
3292 if (__ratelimit(&_rs)) \
3293 btrfs_printk(fs_info, fmt, ##args); \
3296 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3299 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3300 rcu_read_unlock(); \
3303 #ifdef CONFIG_BTRFS_ASSERT
3305 static inline void assertfail(const char *expr, const char *file, int line)
3307 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3311 #define ASSERT(expr) \
3312 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3315 static inline void assertfail(const char *expr, const char* file, int line) { }
3316 #define ASSERT(expr) (void)(expr)
3320 * Use that for functions that are conditionally exported for sanity tests but
3323 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3324 #define EXPORT_FOR_TESTS static
3326 #define EXPORT_FOR_TESTS
3330 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3333 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3338 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3339 unsigned int line, int errno, const char *fmt, ...);
3341 const char * __attribute_const__ btrfs_decode_error(int errno);
3344 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3345 const char *function,
3346 unsigned int line, int errno);
3349 * Call btrfs_abort_transaction as early as possible when an error condition is
3350 * detected, that way the exact line number is reported.
3352 #define btrfs_abort_transaction(trans, errno) \
3354 /* Report first abort since mount */ \
3355 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3356 &((trans)->fs_info->fs_state))) { \
3357 if ((errno) != -EIO && (errno) != -EROFS) { \
3358 WARN(1, KERN_DEBUG \
3359 "BTRFS: Transaction aborted (error %d)\n", \
3362 btrfs_debug((trans)->fs_info, \
3363 "Transaction aborted (error %d)", \
3367 __btrfs_abort_transaction((trans), __func__, \
3368 __LINE__, (errno)); \
3371 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3373 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3374 (errno), fmt, ##args); \
3379 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3380 unsigned int line, int errno, const char *fmt, ...);
3382 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3383 * will panic(). Otherwise we BUG() here.
3385 #define btrfs_panic(fs_info, errno, fmt, args...) \
3387 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3392 /* compatibility and incompatibility defines */
3394 #define btrfs_set_fs_incompat(__fs_info, opt) \
3395 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3398 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3399 u64 flag, const char* name)
3401 struct btrfs_super_block *disk_super;
3404 disk_super = fs_info->super_copy;
3405 features = btrfs_super_incompat_flags(disk_super);
3406 if (!(features & flag)) {
3407 spin_lock(&fs_info->super_lock);
3408 features = btrfs_super_incompat_flags(disk_super);
3409 if (!(features & flag)) {
3411 btrfs_set_super_incompat_flags(disk_super, features);
3413 "setting incompat feature flag for %s (0x%llx)",
3416 spin_unlock(&fs_info->super_lock);
3420 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3421 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3424 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3425 u64 flag, const char* name)
3427 struct btrfs_super_block *disk_super;
3430 disk_super = fs_info->super_copy;
3431 features = btrfs_super_incompat_flags(disk_super);
3432 if (features & flag) {
3433 spin_lock(&fs_info->super_lock);
3434 features = btrfs_super_incompat_flags(disk_super);
3435 if (features & flag) {
3437 btrfs_set_super_incompat_flags(disk_super, features);
3439 "clearing incompat feature flag for %s (0x%llx)",
3442 spin_unlock(&fs_info->super_lock);
3446 #define btrfs_fs_incompat(fs_info, opt) \
3447 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3449 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3451 struct btrfs_super_block *disk_super;
3452 disk_super = fs_info->super_copy;
3453 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3456 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3457 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3460 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3461 u64 flag, const char *name)
3463 struct btrfs_super_block *disk_super;
3466 disk_super = fs_info->super_copy;
3467 features = btrfs_super_compat_ro_flags(disk_super);
3468 if (!(features & flag)) {
3469 spin_lock(&fs_info->super_lock);
3470 features = btrfs_super_compat_ro_flags(disk_super);
3471 if (!(features & flag)) {
3473 btrfs_set_super_compat_ro_flags(disk_super, features);
3475 "setting compat-ro feature flag for %s (0x%llx)",
3478 spin_unlock(&fs_info->super_lock);
3482 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3483 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3486 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3487 u64 flag, const char *name)
3489 struct btrfs_super_block *disk_super;
3492 disk_super = fs_info->super_copy;
3493 features = btrfs_super_compat_ro_flags(disk_super);
3494 if (features & flag) {
3495 spin_lock(&fs_info->super_lock);
3496 features = btrfs_super_compat_ro_flags(disk_super);
3497 if (features & flag) {
3499 btrfs_set_super_compat_ro_flags(disk_super, features);
3501 "clearing compat-ro feature flag for %s (0x%llx)",
3504 spin_unlock(&fs_info->super_lock);
3508 #define btrfs_fs_compat_ro(fs_info, opt) \
3509 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3511 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3513 struct btrfs_super_block *disk_super;
3514 disk_super = fs_info->super_copy;
3515 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3519 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3520 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3521 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3522 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3523 struct inode *inode, struct inode *dir);
3525 #define btrfs_get_acl NULL
3526 #define btrfs_set_acl NULL
3527 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3528 struct inode *inode, struct inode *dir)
3535 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3536 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3537 struct btrfs_root *root);
3538 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3539 struct btrfs_root *root);
3540 int btrfs_recover_relocation(struct btrfs_root *root);
3541 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3542 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3543 struct btrfs_root *root, struct extent_buffer *buf,
3544 struct extent_buffer *cow);
3545 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3546 u64 *bytes_to_reserve);
3547 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3548 struct btrfs_pending_snapshot *pending);
3549 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3550 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3552 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3555 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3556 u64 end, struct btrfs_scrub_progress *progress,
3557 int readonly, int is_dev_replace);
3558 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3559 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3560 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3561 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3562 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3563 struct btrfs_scrub_progress *progress);
3564 static inline void btrfs_init_full_stripe_locks_tree(
3565 struct btrfs_full_stripe_locks_tree *locks_root)
3567 locks_root->root = RB_ROOT;
3568 mutex_init(&locks_root->lock);
3572 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3573 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3574 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3576 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3578 btrfs_bio_counter_sub(fs_info, 1);
3582 struct reada_control {
3583 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3584 struct btrfs_key key_start;
3585 struct btrfs_key key_end; /* exclusive */
3588 wait_queue_head_t wait;
3590 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3591 struct btrfs_key *start, struct btrfs_key *end);
3592 int btrfs_reada_wait(void *handle);
3593 void btrfs_reada_detach(void *handle);
3594 int btree_readahead_hook(struct extent_buffer *eb, int err);
3595 void btrfs_reada_remove_dev(struct btrfs_device *dev);
3596 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev);
3598 static inline int is_fstree(u64 rootid)
3600 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3601 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3602 !btrfs_qgroup_level(rootid)))
3607 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3609 return signal_pending(current);
3612 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3614 /* Sanity test specific functions */
3615 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3616 void btrfs_test_destroy_inode(struct inode *inode);
3617 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3619 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3622 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)