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 * we can actually store much bigger names, but lets not confuse the rest
74 #define BTRFS_NAME_LEN 255
77 * Theoretical limit is larger, but we keep this down to a sane
78 * value. That should limit greatly the possibility of collisions on
81 #define BTRFS_LINK_MAX 65535U
83 #define BTRFS_EMPTY_DIR_SIZE 0
85 /* ioprio of readahead is set to idle */
86 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
88 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
91 * Use large batch size to reduce overhead of metadata updates. On the reader
92 * side, we only read it when we are close to ENOSPC and the read overhead is
93 * mostly related to the number of CPUs, so it is OK to use arbitrary large
96 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
98 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
101 * Deltas are an effective way to populate global statistics. Give macro names
102 * to make it clear what we're doing. An example is discard_extents in
103 * btrfs_free_space_ctl.
105 #define BTRFS_STAT_NR_ENTRIES 2
106 #define BTRFS_STAT_CURR 0
107 #define BTRFS_STAT_PREV 1
110 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
112 static inline u32 count_max_extents(u64 size)
114 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
117 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
119 BUG_ON(num_stripes == 0);
120 return sizeof(struct btrfs_chunk) +
121 sizeof(struct btrfs_stripe) * (num_stripes - 1);
125 * Runtime (in-memory) states of filesystem
128 /* Global indicator of serious filesystem errors */
129 BTRFS_FS_STATE_ERROR,
131 * Filesystem is being remounted, allow to skip some operations, like
134 BTRFS_FS_STATE_REMOUNTING,
135 /* Track if a transaction abort has been reported on this filesystem */
136 BTRFS_FS_STATE_TRANS_ABORTED,
138 * Bio operations should be blocked on this filesystem because a source
139 * or target device is being destroyed as part of a device replace
141 BTRFS_FS_STATE_DEV_REPLACING,
142 /* The btrfs_fs_info created for self-tests */
143 BTRFS_FS_STATE_DUMMY_FS_INFO,
146 #define BTRFS_BACKREF_REV_MAX 256
147 #define BTRFS_BACKREF_REV_SHIFT 56
148 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
149 BTRFS_BACKREF_REV_SHIFT)
151 #define BTRFS_OLD_BACKREF_REV 0
152 #define BTRFS_MIXED_BACKREF_REV 1
155 * every tree block (leaf or node) starts with this header.
157 struct btrfs_header {
158 /* these first four must match the super block */
159 u8 csum[BTRFS_CSUM_SIZE];
160 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
161 __le64 bytenr; /* which block this node is supposed to live in */
164 /* allowed to be different from the super from here on down */
165 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
170 } __attribute__ ((__packed__));
173 * this is a very generous portion of the super block, giving us
174 * room to translate 14 chunks with 3 stripes each.
176 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
179 * just in case we somehow lose the roots and are not able to mount,
180 * we store an array of the roots from previous transactions
183 #define BTRFS_NUM_BACKUP_ROOTS 4
184 struct btrfs_root_backup {
186 __le64 tree_root_gen;
189 __le64 chunk_root_gen;
192 __le64 extent_root_gen;
201 __le64 csum_root_gen;
211 u8 extent_root_level;
215 /* future and to align */
217 } __attribute__ ((__packed__));
220 * the super block basically lists the main trees of the FS
221 * it currently lacks any block count etc etc
223 struct btrfs_super_block {
224 /* the first 4 fields must match struct btrfs_header */
225 u8 csum[BTRFS_CSUM_SIZE];
226 /* FS specific UUID, visible to user */
227 u8 fsid[BTRFS_FSID_SIZE];
228 __le64 bytenr; /* this block number */
231 /* allowed to be different from the btrfs_header from here own down */
238 /* this will help find the new super based on the log root */
239 __le64 log_root_transid;
242 __le64 root_dir_objectid;
246 __le32 __unused_leafsize;
248 __le32 sys_chunk_array_size;
249 __le64 chunk_root_generation;
251 __le64 compat_ro_flags;
252 __le64 incompat_flags;
257 struct btrfs_dev_item dev_item;
259 char label[BTRFS_LABEL_SIZE];
261 __le64 cache_generation;
262 __le64 uuid_tree_generation;
264 /* the UUID written into btree blocks */
265 u8 metadata_uuid[BTRFS_FSID_SIZE];
267 /* future expansion */
269 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
270 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
271 } __attribute__ ((__packed__));
274 * Compat flags that we support. If any incompat flags are set other than the
275 * ones specified below then we will fail to mount
277 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
278 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
279 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
281 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
282 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
283 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
285 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
286 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
288 #define BTRFS_FEATURE_INCOMPAT_SUPP \
289 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
290 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
291 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
292 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
293 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
294 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
295 BTRFS_FEATURE_INCOMPAT_RAID56 | \
296 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
297 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
298 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
299 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
300 BTRFS_FEATURE_INCOMPAT_RAID1C34)
302 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
303 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
304 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
307 * A leaf is full of items. offset and size tell us where to find
308 * the item in the leaf (relative to the start of the data area)
311 struct btrfs_disk_key key;
314 } __attribute__ ((__packed__));
317 * leaves have an item area and a data area:
318 * [item0, item1....itemN] [free space] [dataN...data1, data0]
320 * The data is separate from the items to get the keys closer together
324 struct btrfs_header header;
325 struct btrfs_item items[];
326 } __attribute__ ((__packed__));
329 * all non-leaf blocks are nodes, they hold only keys and pointers to
332 struct btrfs_key_ptr {
333 struct btrfs_disk_key key;
336 } __attribute__ ((__packed__));
339 struct btrfs_header header;
340 struct btrfs_key_ptr ptrs[];
341 } __attribute__ ((__packed__));
344 * btrfs_paths remember the path taken from the root down to the leaf.
345 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
346 * to any other levels that are present.
348 * The slots array records the index of the item or block pointer
349 * used while walking the tree.
351 enum { READA_NONE, READA_BACK, READA_FORWARD };
353 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
354 int slots[BTRFS_MAX_LEVEL];
355 /* if there is real range locking, this locks field will change */
356 u8 locks[BTRFS_MAX_LEVEL];
358 /* keep some upper locks as we walk down */
362 * set by btrfs_split_item, tells search_slot to keep all locks
363 * and to force calls to keep space in the nodes
365 unsigned int search_for_split:1;
366 unsigned int keep_locks:1;
367 unsigned int skip_locking:1;
368 unsigned int search_commit_root:1;
369 unsigned int need_commit_sem:1;
370 unsigned int skip_release_on_error:1;
372 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
373 sizeof(struct btrfs_item))
374 struct btrfs_dev_replace {
375 u64 replace_state; /* see #define above */
376 time64_t time_started; /* seconds since 1-Jan-1970 */
377 time64_t time_stopped; /* seconds since 1-Jan-1970 */
378 atomic64_t num_write_errors;
379 atomic64_t num_uncorrectable_read_errors;
382 u64 committed_cursor_left;
383 u64 cursor_left_last_write_of_item;
386 u64 cont_reading_from_srcdev_mode; /* see #define above */
389 int item_needs_writeback;
390 struct btrfs_device *srcdev;
391 struct btrfs_device *tgtdev;
393 struct mutex lock_finishing_cancel_unmount;
394 struct rw_semaphore rwsem;
396 struct btrfs_scrub_progress scrub_progress;
398 struct percpu_counter bio_counter;
399 wait_queue_head_t replace_wait;
403 * free clusters are used to claim free space in relatively large chunks,
404 * allowing us to do less seeky writes. They are used for all metadata
405 * allocations. In ssd_spread mode they are also used for data allocations.
407 struct btrfs_free_cluster {
409 spinlock_t refill_lock;
412 /* largest extent in this cluster */
415 /* first extent starting offset */
418 /* We did a full search and couldn't create a cluster */
421 struct btrfs_block_group *block_group;
423 * when a cluster is allocated from a block group, we put the
424 * cluster onto a list in the block group so that it can
425 * be freed before the block group is freed.
427 struct list_head block_group_list;
430 enum btrfs_caching_type {
434 BTRFS_CACHE_FINISHED,
439 * Tree to record all locked full stripes of a RAID5/6 block group
441 struct btrfs_full_stripe_locks_tree {
446 /* Discard control. */
448 * Async discard uses multiple lists to differentiate the discard filter
449 * parameters. Index 0 is for completely free block groups where we need to
450 * ensure the entire block group is trimmed without being lossy. Indices
451 * afterwards represent monotonically decreasing discard filter sizes to
452 * prioritize what should be discarded next.
454 #define BTRFS_NR_DISCARD_LISTS 3
455 #define BTRFS_DISCARD_INDEX_UNUSED 0
456 #define BTRFS_DISCARD_INDEX_START 1
458 struct btrfs_discard_ctl {
459 struct workqueue_struct *discard_workers;
460 struct delayed_work work;
462 struct btrfs_block_group *block_group;
463 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
465 u64 prev_discard_time;
466 atomic_t discardable_extents;
467 atomic64_t discardable_bytes;
468 u64 max_discard_size;
472 u64 discard_extent_bytes;
473 u64 discard_bitmap_bytes;
474 atomic64_t discard_bytes_saved;
477 /* delayed seq elem */
479 struct list_head list;
483 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
485 #define SEQ_LAST ((u64)-1)
487 enum btrfs_orphan_cleanup_state {
488 ORPHAN_CLEANUP_STARTED = 1,
489 ORPHAN_CLEANUP_DONE = 2,
492 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
495 struct reloc_control;
497 struct btrfs_fs_devices;
498 struct btrfs_balance_control;
499 struct btrfs_delayed_root;
502 * Block group or device which contains an active swapfile. Used for preventing
503 * unsafe operations while a swapfile is active.
505 * These are sorted on (ptr, inode) (note that a block group or device can
506 * contain more than one swapfile). We compare the pointer values because we
507 * don't actually care what the object is, we just need a quick check whether
508 * the object exists in the rbtree.
510 struct btrfs_swapfile_pin {
515 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
516 * points to a struct btrfs_device.
521 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
525 BTRFS_FS_CLOSING_START,
526 BTRFS_FS_CLOSING_DONE,
527 BTRFS_FS_LOG_RECOVERING,
529 BTRFS_FS_QUOTA_ENABLED,
530 BTRFS_FS_UPDATE_UUID_TREE_GEN,
531 BTRFS_FS_CREATING_FREE_SPACE_TREE,
535 BTRFS_FS_QUOTA_OVERRIDE,
536 /* Used to record internally whether fs has been frozen */
539 * Indicate that balance has been set up from the ioctl and is in the
540 * main phase. The fs_info::balance_ctl is initialized.
541 * Set and cleared while holding fs_info::balance_mutex.
543 BTRFS_FS_BALANCE_RUNNING,
545 /* Indicate that the cleaner thread is awake and doing something. */
546 BTRFS_FS_CLEANER_RUNNING,
549 * The checksumming has an optimized version and is considered fast,
550 * so we don't need to offload checksums to workqueues.
552 BTRFS_FS_CSUM_IMPL_FAST,
554 /* Indicate that the discard workqueue can service discards. */
555 BTRFS_FS_DISCARD_RUNNING,
557 /* Indicate that we need to cleanup space cache v1 */
558 BTRFS_FS_CLEANUP_SPACE_CACHE_V1,
562 * Exclusive operations (device replace, resize, device add/remove, balance)
564 enum btrfs_exclusive_operation {
566 BTRFS_EXCLOP_BALANCE,
567 BTRFS_EXCLOP_DEV_ADD,
568 BTRFS_EXCLOP_DEV_REMOVE,
569 BTRFS_EXCLOP_DEV_REPLACE,
571 BTRFS_EXCLOP_SWAP_ACTIVATE,
574 struct btrfs_fs_info {
575 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
577 struct btrfs_root *extent_root;
578 struct btrfs_root *tree_root;
579 struct btrfs_root *chunk_root;
580 struct btrfs_root *dev_root;
581 struct btrfs_root *fs_root;
582 struct btrfs_root *csum_root;
583 struct btrfs_root *quota_root;
584 struct btrfs_root *uuid_root;
585 struct btrfs_root *free_space_root;
586 struct btrfs_root *data_reloc_root;
588 /* the log root tree is a directory of all the other log roots */
589 struct btrfs_root *log_root_tree;
591 spinlock_t fs_roots_radix_lock;
592 struct radix_tree_root fs_roots_radix;
594 /* block group cache stuff */
595 spinlock_t block_group_cache_lock;
596 u64 first_logical_byte;
597 struct rb_root block_group_cache_tree;
599 /* keep track of unallocated space */
600 atomic64_t free_chunk_space;
602 /* Track ranges which are used by log trees blocks/logged data extents */
603 struct extent_io_tree excluded_extents;
605 /* logical->physical extent mapping */
606 struct extent_map_tree mapping_tree;
609 * block reservation for extent, checksum, root tree and
610 * delayed dir index item
612 struct btrfs_block_rsv global_block_rsv;
613 /* block reservation for metadata operations */
614 struct btrfs_block_rsv trans_block_rsv;
615 /* block reservation for chunk tree */
616 struct btrfs_block_rsv chunk_block_rsv;
617 /* block reservation for delayed operations */
618 struct btrfs_block_rsv delayed_block_rsv;
619 /* block reservation for delayed refs */
620 struct btrfs_block_rsv delayed_refs_rsv;
622 struct btrfs_block_rsv empty_block_rsv;
625 u64 last_trans_committed;
626 u64 avg_delayed_ref_runtime;
629 * this is updated to the current trans every time a full commit
630 * is required instead of the faster short fsync log commits
632 u64 last_trans_log_full_commit;
633 unsigned long mount_opt;
635 * Track requests for actions that need to be done during transaction
636 * commit (like for some mount options).
638 unsigned long pending_changes;
639 unsigned long compress_type:4;
640 unsigned int compress_level;
643 * It is a suggestive number, the read side is safe even it gets a
644 * wrong number because we will write out the data into a regular
645 * extent. The write side(mount/remount) is under ->s_umount lock,
646 * so it is also safe.
650 struct btrfs_transaction *running_transaction;
651 wait_queue_head_t transaction_throttle;
652 wait_queue_head_t transaction_wait;
653 wait_queue_head_t transaction_blocked_wait;
654 wait_queue_head_t async_submit_wait;
657 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
658 * when they are updated.
660 * Because we do not clear the flags for ever, so we needn't use
661 * the lock on the read side.
663 * We also needn't use the lock when we mount the fs, because
664 * there is no other task which will update the flag.
666 spinlock_t super_lock;
667 struct btrfs_super_block *super_copy;
668 struct btrfs_super_block *super_for_commit;
669 struct super_block *sb;
670 struct inode *btree_inode;
671 struct mutex tree_log_mutex;
672 struct mutex transaction_kthread_mutex;
673 struct mutex cleaner_mutex;
674 struct mutex chunk_mutex;
677 * this is taken to make sure we don't set block groups ro after
678 * the free space cache has been allocated on them
680 struct mutex ro_block_group_mutex;
682 /* this is used during read/modify/write to make sure
683 * no two ios are trying to mod the same stripe at the same
686 struct btrfs_stripe_hash_table *stripe_hash_table;
689 * this protects the ordered operations list only while we are
690 * processing all of the entries on it. This way we make
691 * sure the commit code doesn't find the list temporarily empty
692 * because another function happens to be doing non-waiting preflush
693 * before jumping into the main commit.
695 struct mutex ordered_operations_mutex;
697 struct rw_semaphore commit_root_sem;
699 struct rw_semaphore cleanup_work_sem;
701 struct rw_semaphore subvol_sem;
703 spinlock_t trans_lock;
705 * the reloc mutex goes with the trans lock, it is taken
706 * during commit to protect us from the relocation code
708 struct mutex reloc_mutex;
710 struct list_head trans_list;
711 struct list_head dead_roots;
712 struct list_head caching_block_groups;
714 spinlock_t delayed_iput_lock;
715 struct list_head delayed_iputs;
716 atomic_t nr_delayed_iputs;
717 wait_queue_head_t delayed_iputs_wait;
719 atomic64_t tree_mod_seq;
721 /* this protects tree_mod_log and tree_mod_seq_list */
722 rwlock_t tree_mod_log_lock;
723 struct rb_root tree_mod_log;
724 struct list_head tree_mod_seq_list;
726 atomic_t async_delalloc_pages;
729 * this is used to protect the following list -- ordered_roots.
731 spinlock_t ordered_root_lock;
734 * all fs/file tree roots in which there are data=ordered extents
735 * pending writeback are added into this list.
737 * these can span multiple transactions and basically include
738 * every dirty data page that isn't from nodatacow
740 struct list_head ordered_roots;
742 struct mutex delalloc_root_mutex;
743 spinlock_t delalloc_root_lock;
744 /* all fs/file tree roots that have delalloc inodes. */
745 struct list_head delalloc_roots;
748 * there is a pool of worker threads for checksumming during writes
749 * and a pool for checksumming after reads. This is because readers
750 * can run with FS locks held, and the writers may be waiting for
751 * those locks. We don't want ordering in the pending list to cause
752 * deadlocks, and so the two are serviced separately.
754 * A third pool does submit_bio to avoid deadlocking with the other
757 struct btrfs_workqueue *workers;
758 struct btrfs_workqueue *delalloc_workers;
759 struct btrfs_workqueue *flush_workers;
760 struct btrfs_workqueue *endio_workers;
761 struct btrfs_workqueue *endio_meta_workers;
762 struct btrfs_workqueue *endio_raid56_workers;
763 struct btrfs_workqueue *rmw_workers;
764 struct btrfs_workqueue *endio_meta_write_workers;
765 struct btrfs_workqueue *endio_write_workers;
766 struct btrfs_workqueue *endio_freespace_worker;
767 struct btrfs_workqueue *caching_workers;
768 struct btrfs_workqueue *readahead_workers;
771 * fixup workers take dirty pages that didn't properly go through
772 * the cow mechanism and make them safe to write. It happens
773 * for the sys_munmap function call path
775 struct btrfs_workqueue *fixup_workers;
776 struct btrfs_workqueue *delayed_workers;
778 struct task_struct *transaction_kthread;
779 struct task_struct *cleaner_kthread;
780 u32 thread_pool_size;
782 struct kobject *space_info_kobj;
783 struct kobject *qgroups_kobj;
787 /* used to keep from writing metadata until there is a nice batch */
788 struct percpu_counter dirty_metadata_bytes;
789 struct percpu_counter delalloc_bytes;
790 struct percpu_counter dio_bytes;
791 s32 dirty_metadata_batch;
794 struct list_head dirty_cowonly_roots;
796 struct btrfs_fs_devices *fs_devices;
799 * The space_info list is effectively read only after initial
800 * setup. It is populated at mount time and cleaned up after
801 * all block groups are removed. RCU is used to protect it.
803 struct list_head space_info;
805 struct btrfs_space_info *data_sinfo;
807 struct reloc_control *reloc_ctl;
809 /* data_alloc_cluster is only used in ssd_spread mode */
810 struct btrfs_free_cluster data_alloc_cluster;
812 /* all metadata allocations go through this cluster */
813 struct btrfs_free_cluster meta_alloc_cluster;
815 /* auto defrag inodes go here */
816 spinlock_t defrag_inodes_lock;
817 struct rb_root defrag_inodes;
818 atomic_t defrag_running;
820 /* Used to protect avail_{data, metadata, system}_alloc_bits */
821 seqlock_t profiles_lock;
823 * these three are in extended format (availability of single
824 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
825 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
827 u64 avail_data_alloc_bits;
828 u64 avail_metadata_alloc_bits;
829 u64 avail_system_alloc_bits;
831 /* restriper state */
832 spinlock_t balance_lock;
833 struct mutex balance_mutex;
834 atomic_t balance_pause_req;
835 atomic_t balance_cancel_req;
836 struct btrfs_balance_control *balance_ctl;
837 wait_queue_head_t balance_wait_q;
839 u32 data_chunk_allocations;
844 /* private scrub information */
845 struct mutex scrub_lock;
846 atomic_t scrubs_running;
847 atomic_t scrub_pause_req;
848 atomic_t scrubs_paused;
849 atomic_t scrub_cancel_req;
850 wait_queue_head_t scrub_pause_wait;
852 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
855 refcount_t scrub_workers_refcnt;
856 struct btrfs_workqueue *scrub_workers;
857 struct btrfs_workqueue *scrub_wr_completion_workers;
858 struct btrfs_workqueue *scrub_parity_workers;
860 struct btrfs_discard_ctl discard_ctl;
862 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
863 u32 check_integrity_print_mask;
865 /* is qgroup tracking in a consistent state? */
868 /* holds configuration and tracking. Protected by qgroup_lock */
869 struct rb_root qgroup_tree;
870 spinlock_t qgroup_lock;
873 * used to avoid frequently calling ulist_alloc()/ulist_free()
874 * when doing qgroup accounting, it must be protected by qgroup_lock.
876 struct ulist *qgroup_ulist;
879 * Protect user change for quota operations. If a transaction is needed,
880 * it must be started before locking this lock.
882 struct mutex qgroup_ioctl_lock;
884 /* list of dirty qgroups to be written at next commit */
885 struct list_head dirty_qgroups;
887 /* used by qgroup for an efficient tree traversal */
890 /* qgroup rescan items */
891 struct mutex qgroup_rescan_lock; /* protects the progress item */
892 struct btrfs_key qgroup_rescan_progress;
893 struct btrfs_workqueue *qgroup_rescan_workers;
894 struct completion qgroup_rescan_completion;
895 struct btrfs_work qgroup_rescan_work;
896 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
898 /* filesystem state */
899 unsigned long fs_state;
901 struct btrfs_delayed_root *delayed_root;
904 spinlock_t reada_lock;
905 struct radix_tree_root reada_tree;
907 /* readahead works cnt */
908 atomic_t reada_works_cnt;
910 /* Extent buffer radix tree */
911 spinlock_t buffer_lock;
912 /* Entries are eb->start / sectorsize */
913 struct radix_tree_root buffer_radix;
915 /* next backup root to be overwritten */
916 int backup_root_index;
918 /* device replace state */
919 struct btrfs_dev_replace dev_replace;
921 struct semaphore uuid_tree_rescan_sem;
923 /* Used to reclaim the metadata space in the background. */
924 struct work_struct async_reclaim_work;
925 struct work_struct async_data_reclaim_work;
927 spinlock_t unused_bgs_lock;
928 struct list_head unused_bgs;
929 struct mutex unused_bg_unpin_mutex;
930 struct mutex delete_unused_bgs_mutex;
932 /* Cached block sizes */
935 /* ilog2 of sectorsize, use to avoid 64bit division */
941 /* Block groups and devices containing active swapfiles. */
942 spinlock_t swapfile_pins_lock;
943 struct rb_root swapfile_pins;
945 struct crypto_shash *csum_shash;
948 * Number of send operations in progress.
949 * Updated while holding fs_info::balance_mutex.
951 int send_in_progress;
953 /* Type of exclusive operation running */
954 unsigned long exclusive_operation;
957 * Zone size > 0 when in ZONED mode, otherwise it's used for a check
958 * if the mode is enabled
965 /* Max size to emit ZONE_APPEND write command */
966 u64 max_zone_append_size;
968 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
969 spinlock_t ref_verify_lock;
970 struct rb_root block_tree;
973 #ifdef CONFIG_BTRFS_DEBUG
974 struct kobject *debug_kobj;
975 struct kobject *discard_debug_kobj;
976 struct list_head allocated_roots;
978 spinlock_t eb_leak_lock;
979 struct list_head allocated_ebs;
983 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
985 return sb->s_fs_info;
989 * The state of btrfs root
993 * btrfs_record_root_in_trans is a multi-step process, and it can race
994 * with the balancing code. But the race is very small, and only the
995 * first time the root is added to each transaction. So IN_TRANS_SETUP
996 * is used to tell us when more checks are required
998 BTRFS_ROOT_IN_TRANS_SETUP,
1001 * Set if tree blocks of this root can be shared by other roots.
1002 * Only subvolume trees and their reloc trees have this bit set.
1003 * Conflicts with TRACK_DIRTY bit.
1005 * This affects two things:
1007 * - How balance works
1008 * For shareable roots, we need to use reloc tree and do path
1009 * replacement for balance, and need various pre/post hooks for
1010 * snapshot creation to handle them.
1012 * While for non-shareable trees, we just simply do a tree search
1015 * - How dirty roots are tracked
1016 * For shareable roots, btrfs_record_root_in_trans() is needed to
1017 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1018 * don't need to set this manually.
1020 BTRFS_ROOT_SHAREABLE,
1021 BTRFS_ROOT_TRACK_DIRTY,
1022 BTRFS_ROOT_IN_RADIX,
1023 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1024 BTRFS_ROOT_DEFRAG_RUNNING,
1025 BTRFS_ROOT_FORCE_COW,
1026 BTRFS_ROOT_MULTI_LOG_TASKS,
1028 BTRFS_ROOT_DELETING,
1031 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1033 * Set for the subvolume tree owning the reloc tree.
1035 BTRFS_ROOT_DEAD_RELOC_TREE,
1036 /* Mark dead root stored on device whose cleanup needs to be resumed */
1037 BTRFS_ROOT_DEAD_TREE,
1038 /* The root has a log tree. Used for subvolume roots and the tree root. */
1039 BTRFS_ROOT_HAS_LOG_TREE,
1040 /* Qgroup flushing is in progress */
1041 BTRFS_ROOT_QGROUP_FLUSHING,
1045 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1046 * code. For detail check comment in fs/btrfs/qgroup.c.
1048 struct btrfs_qgroup_swapped_blocks {
1050 /* RM_EMPTY_ROOT() of above blocks[] */
1052 struct rb_root blocks[BTRFS_MAX_LEVEL];
1056 * in ram representation of the tree. extent_root is used for all allocations
1057 * and for the extent tree extent_root root.
1060 struct extent_buffer *node;
1062 struct extent_buffer *commit_root;
1063 struct btrfs_root *log_root;
1064 struct btrfs_root *reloc_root;
1066 unsigned long state;
1067 struct btrfs_root_item root_item;
1068 struct btrfs_key root_key;
1069 struct btrfs_fs_info *fs_info;
1070 struct extent_io_tree dirty_log_pages;
1072 struct mutex objectid_mutex;
1074 spinlock_t accounting_lock;
1075 struct btrfs_block_rsv *block_rsv;
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 /* Arguments for btrfs_drop_extents() */
1236 struct btrfs_drop_extents_args {
1237 /* Input parameters */
1240 * If NULL, btrfs_drop_extents() will allocate and free its own path.
1241 * If 'replace_extent' is true, this must not be NULL. Also the path
1242 * is always released except if 'replace_extent' is true and
1243 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case
1244 * the path is kept locked.
1246 struct btrfs_path *path;
1247 /* Start offset of the range to drop extents from */
1249 /* End (exclusive, last byte + 1) of the range to drop extents from */
1251 /* If true drop all the extent maps in the range */
1254 * If true it means we want to insert a new extent after dropping all
1255 * the extents in the range. If this is true, the 'extent_item_size'
1256 * parameter must be set as well and the 'extent_inserted' field will
1257 * be set to true by btrfs_drop_extents() if it could insert the new
1259 * Note: when this is set to true the path must not be NULL.
1261 bool replace_extent;
1263 * Used if 'replace_extent' is true. Size of the file extent item to
1264 * insert after dropping all existing extents in the range
1266 u32 extent_item_size;
1268 /* Output parameters */
1271 * Set to the minimum between the input parameter 'end' and the end
1272 * (exclusive, last byte + 1) of the last dropped extent. This is always
1273 * set even if btrfs_drop_extents() returns an error.
1277 * The number of allocated bytes found in the range. This can be smaller
1278 * than the range's length when there are holes in the range.
1282 * Only set if 'replace_extent' is true. Set to true if we were able
1283 * to insert a replacement extent after dropping all extents in the
1284 * range, otherwise set to false by btrfs_drop_extents().
1285 * Also, if btrfs_drop_extents() has set this to true it means it
1286 * returned with the path locked, otherwise if it has set this to
1287 * false it has returned with the path released.
1289 bool extent_inserted;
1292 struct btrfs_file_private {
1297 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1300 return info->nodesize - sizeof(struct btrfs_header);
1303 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1305 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1307 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1310 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1312 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1315 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1316 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1317 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1319 return BTRFS_MAX_ITEM_SIZE(info) -
1320 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1323 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1325 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1329 * Flags for mount options.
1331 * Note: don't forget to add new options to btrfs_show_options()
1333 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1334 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1335 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1336 #define BTRFS_MOUNT_SSD (1 << 3)
1337 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1338 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1339 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1340 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1341 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1342 #define BTRFS_MOUNT_NOSSD (1 << 9)
1343 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1344 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1345 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1346 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1347 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1348 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1349 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1350 /* bit 17 is free */
1351 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1352 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1353 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1354 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1355 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1356 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1357 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1358 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1359 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1360 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1361 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1362 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1363 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30)
1364 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31)
1366 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1367 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1369 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1370 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1371 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1372 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1375 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1377 if (!btrfs_test_opt(fs_info, opt)) \
1378 btrfs_info(fs_info, fmt, ##args); \
1379 btrfs_set_opt(fs_info->mount_opt, opt); \
1382 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1384 if (btrfs_test_opt(fs_info, opt)) \
1385 btrfs_info(fs_info, fmt, ##args); \
1386 btrfs_clear_opt(fs_info->mount_opt, opt); \
1390 * Requests for changes that need to be done during transaction commit.
1392 * Internal mount options that are used for special handling of the real
1393 * mount options (eg. cannot be set during remount and have to be set during
1394 * transaction commit)
1397 #define BTRFS_PENDING_COMMIT (0)
1399 #define btrfs_test_pending(info, opt) \
1400 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1401 #define btrfs_set_pending(info, opt) \
1402 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1403 #define btrfs_clear_pending(info, opt) \
1404 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1407 * Helpers for setting pending mount option changes.
1409 * Expects corresponding macros
1410 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1412 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1414 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1415 btrfs_info((info), fmt, ##args); \
1416 btrfs_set_pending((info), SET_##opt); \
1417 btrfs_clear_pending((info), CLEAR_##opt); \
1421 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1423 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1424 btrfs_info((info), fmt, ##args); \
1425 btrfs_set_pending((info), CLEAR_##opt); \
1426 btrfs_clear_pending((info), SET_##opt); \
1433 #define BTRFS_INODE_NODATASUM (1 << 0)
1434 #define BTRFS_INODE_NODATACOW (1 << 1)
1435 #define BTRFS_INODE_READONLY (1 << 2)
1436 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1437 #define BTRFS_INODE_PREALLOC (1 << 4)
1438 #define BTRFS_INODE_SYNC (1 << 5)
1439 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1440 #define BTRFS_INODE_APPEND (1 << 7)
1441 #define BTRFS_INODE_NODUMP (1 << 8)
1442 #define BTRFS_INODE_NOATIME (1 << 9)
1443 #define BTRFS_INODE_DIRSYNC (1 << 10)
1444 #define BTRFS_INODE_COMPRESS (1 << 11)
1446 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1448 #define BTRFS_INODE_FLAG_MASK \
1449 (BTRFS_INODE_NODATASUM | \
1450 BTRFS_INODE_NODATACOW | \
1451 BTRFS_INODE_READONLY | \
1452 BTRFS_INODE_NOCOMPRESS | \
1453 BTRFS_INODE_PREALLOC | \
1454 BTRFS_INODE_SYNC | \
1455 BTRFS_INODE_IMMUTABLE | \
1456 BTRFS_INODE_APPEND | \
1457 BTRFS_INODE_NODUMP | \
1458 BTRFS_INODE_NOATIME | \
1459 BTRFS_INODE_DIRSYNC | \
1460 BTRFS_INODE_COMPRESS | \
1461 BTRFS_INODE_ROOT_ITEM_INIT)
1463 struct btrfs_map_token {
1464 struct extent_buffer *eb;
1466 unsigned long offset;
1469 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1470 ((bytes) >> (fs_info)->sectorsize_bits)
1472 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1473 struct extent_buffer *eb)
1476 token->kaddr = page_address(eb->pages[0]);
1480 /* some macros to generate set/get functions for the struct fields. This
1481 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1484 #define le8_to_cpu(v) (v)
1485 #define cpu_to_le8(v) (v)
1488 static inline u8 get_unaligned_le8(const void *p)
1493 static inline void put_unaligned_le8(u8 val, void *p)
1498 #define read_eb_member(eb, ptr, type, member, result) (\
1499 read_extent_buffer(eb, (char *)(result), \
1500 ((unsigned long)(ptr)) + \
1501 offsetof(type, member), \
1502 sizeof(((type *)0)->member)))
1504 #define write_eb_member(eb, ptr, type, member, result) (\
1505 write_extent_buffer(eb, (char *)(result), \
1506 ((unsigned long)(ptr)) + \
1507 offsetof(type, member), \
1508 sizeof(((type *)0)->member)))
1510 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1511 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1512 const void *ptr, unsigned long off); \
1513 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1514 const void *ptr, unsigned long off, \
1516 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1517 const void *ptr, unsigned long off); \
1518 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1519 unsigned long off, u##bits val);
1521 DECLARE_BTRFS_SETGET_BITS(8)
1522 DECLARE_BTRFS_SETGET_BITS(16)
1523 DECLARE_BTRFS_SETGET_BITS(32)
1524 DECLARE_BTRFS_SETGET_BITS(64)
1526 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1527 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1530 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1531 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1533 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1536 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1537 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1539 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1542 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1543 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1545 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1546 type *s, u##bits val) \
1548 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1549 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1552 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1553 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1555 const type *p = page_address(eb->pages[0]) + \
1556 offset_in_page(eb->start); \
1557 return get_unaligned_le##bits(&p->member); \
1559 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1562 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \
1563 put_unaligned_le##bits(val, &p->member); \
1566 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1567 static inline u##bits btrfs_##name(const type *s) \
1569 return get_unaligned_le##bits(&s->member); \
1571 static inline void btrfs_set_##name(type *s, u##bits val) \
1573 put_unaligned_le##bits(val, &s->member); \
1576 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1577 struct btrfs_dev_item *s)
1579 BUILD_BUG_ON(sizeof(u64) !=
1580 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1581 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1584 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1585 struct btrfs_dev_item *s,
1588 BUILD_BUG_ON(sizeof(u64) !=
1589 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1590 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1591 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1595 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1596 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1597 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1598 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1599 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1601 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1602 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1603 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1604 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1605 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1606 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1608 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1609 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1611 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1613 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1615 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1617 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1619 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1622 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1624 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1626 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1629 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1631 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1634 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1636 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1639 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1640 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1641 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1642 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1643 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1644 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1645 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1646 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1647 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1648 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1649 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1651 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1653 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1656 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1658 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1660 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1662 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1671 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1672 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1674 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1677 unsigned long offset = (unsigned long)c;
1678 offset += offsetof(struct btrfs_chunk, stripe);
1679 offset += nr * sizeof(struct btrfs_stripe);
1680 return (struct btrfs_stripe *)offset;
1683 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1685 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1688 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1689 struct btrfs_chunk *c, int nr)
1691 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1694 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1695 struct btrfs_chunk *c, int nr)
1697 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1700 /* struct btrfs_block_group_item */
1701 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1703 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1705 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1706 struct btrfs_block_group_item, chunk_objectid, 64);
1708 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1709 struct btrfs_block_group_item, chunk_objectid, 64);
1710 BTRFS_SETGET_FUNCS(block_group_flags,
1711 struct btrfs_block_group_item, flags, 64);
1712 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1713 struct btrfs_block_group_item, flags, 64);
1715 /* struct btrfs_free_space_info */
1716 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1718 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1720 /* struct btrfs_inode_ref */
1721 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1722 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1724 /* struct btrfs_inode_extref */
1725 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1726 parent_objectid, 64);
1727 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1729 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1731 /* struct btrfs_inode_item */
1732 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1733 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1734 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1735 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1736 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1737 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1738 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1739 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1740 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1741 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1742 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1743 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1744 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1746 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1759 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1761 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1762 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1763 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1764 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1766 /* struct btrfs_dev_extent */
1767 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1769 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1770 chunk_objectid, 64);
1771 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1773 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1774 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1775 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1777 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1779 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1781 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1782 struct btrfs_tree_block_info *item,
1783 struct btrfs_disk_key *key)
1785 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1788 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1789 struct btrfs_tree_block_info *item,
1790 struct btrfs_disk_key *key)
1792 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1795 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1797 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1799 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1801 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1804 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1807 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1809 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1812 static inline u32 btrfs_extent_inline_ref_size(int type)
1814 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1815 type == BTRFS_SHARED_BLOCK_REF_KEY)
1816 return sizeof(struct btrfs_extent_inline_ref);
1817 if (type == BTRFS_SHARED_DATA_REF_KEY)
1818 return sizeof(struct btrfs_shared_data_ref) +
1819 sizeof(struct btrfs_extent_inline_ref);
1820 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1821 return sizeof(struct btrfs_extent_data_ref) +
1822 offsetof(struct btrfs_extent_inline_ref, offset);
1826 /* struct btrfs_node */
1827 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1828 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1829 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1831 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1834 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1837 ptr = offsetof(struct btrfs_node, ptrs) +
1838 sizeof(struct btrfs_key_ptr) * nr;
1839 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1842 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1846 ptr = offsetof(struct btrfs_node, ptrs) +
1847 sizeof(struct btrfs_key_ptr) * nr;
1848 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1851 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1854 ptr = offsetof(struct btrfs_node, ptrs) +
1855 sizeof(struct btrfs_key_ptr) * nr;
1856 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1859 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1863 ptr = offsetof(struct btrfs_node, ptrs) +
1864 sizeof(struct btrfs_key_ptr) * nr;
1865 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1868 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1870 return offsetof(struct btrfs_node, ptrs) +
1871 sizeof(struct btrfs_key_ptr) * nr;
1874 void btrfs_node_key(const struct extent_buffer *eb,
1875 struct btrfs_disk_key *disk_key, int nr);
1877 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1878 struct btrfs_disk_key *disk_key, int nr)
1881 ptr = btrfs_node_key_ptr_offset(nr);
1882 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1883 struct btrfs_key_ptr, key, disk_key);
1886 /* struct btrfs_item */
1887 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1888 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1889 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1890 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1892 static inline unsigned long btrfs_item_nr_offset(int nr)
1894 return offsetof(struct btrfs_leaf, items) +
1895 sizeof(struct btrfs_item) * nr;
1898 static inline struct btrfs_item *btrfs_item_nr(int nr)
1900 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1903 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1904 struct btrfs_item *item)
1906 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1909 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1911 return btrfs_item_end(eb, btrfs_item_nr(nr));
1914 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1916 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1919 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1921 return btrfs_item_size(eb, btrfs_item_nr(nr));
1924 static inline void btrfs_item_key(const struct extent_buffer *eb,
1925 struct btrfs_disk_key *disk_key, int nr)
1927 struct btrfs_item *item = btrfs_item_nr(nr);
1928 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1931 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1932 struct btrfs_disk_key *disk_key, int nr)
1934 struct btrfs_item *item = btrfs_item_nr(nr);
1935 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1938 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1941 * struct btrfs_root_ref
1943 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1944 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1945 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1947 /* struct btrfs_dir_item */
1948 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1949 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1950 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1951 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1952 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1953 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1955 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1957 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1960 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1961 const struct btrfs_dir_item *item,
1962 struct btrfs_disk_key *key)
1964 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1967 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1968 struct btrfs_dir_item *item,
1969 const struct btrfs_disk_key *key)
1971 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1974 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1976 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1978 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1981 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1982 const struct btrfs_free_space_header *h,
1983 struct btrfs_disk_key *key)
1985 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1988 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1989 struct btrfs_free_space_header *h,
1990 const struct btrfs_disk_key *key)
1992 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1995 /* struct btrfs_disk_key */
1996 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1998 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1999 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2001 #ifdef __LITTLE_ENDIAN
2004 * Optimized helpers for little-endian architectures where CPU and on-disk
2005 * structures have the same endianness and we can skip conversions.
2008 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
2009 const struct btrfs_disk_key *disk_key)
2011 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
2014 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
2015 const struct btrfs_key *cpu_key)
2017 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
2020 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2021 struct btrfs_key *cpu_key, int nr)
2023 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2025 btrfs_node_key(eb, disk_key, nr);
2028 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2029 struct btrfs_key *cpu_key, int nr)
2031 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2033 btrfs_item_key(eb, disk_key, nr);
2036 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2037 const struct btrfs_dir_item *item,
2038 struct btrfs_key *cpu_key)
2040 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2042 btrfs_dir_item_key(eb, item, disk_key);
2047 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2048 const struct btrfs_disk_key *disk)
2050 cpu->offset = le64_to_cpu(disk->offset);
2051 cpu->type = disk->type;
2052 cpu->objectid = le64_to_cpu(disk->objectid);
2055 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2056 const struct btrfs_key *cpu)
2058 disk->offset = cpu_to_le64(cpu->offset);
2059 disk->type = cpu->type;
2060 disk->objectid = cpu_to_le64(cpu->objectid);
2063 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2064 struct btrfs_key *key, int nr)
2066 struct btrfs_disk_key disk_key;
2067 btrfs_node_key(eb, &disk_key, nr);
2068 btrfs_disk_key_to_cpu(key, &disk_key);
2071 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2072 struct btrfs_key *key, int nr)
2074 struct btrfs_disk_key disk_key;
2075 btrfs_item_key(eb, &disk_key, nr);
2076 btrfs_disk_key_to_cpu(key, &disk_key);
2079 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2080 const struct btrfs_dir_item *item,
2081 struct btrfs_key *key)
2083 struct btrfs_disk_key disk_key;
2084 btrfs_dir_item_key(eb, item, &disk_key);
2085 btrfs_disk_key_to_cpu(key, &disk_key);
2090 /* struct btrfs_header */
2091 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2092 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2094 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2095 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2096 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2097 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2098 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2100 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2101 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2103 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2105 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2107 return (btrfs_header_flags(eb) & flag) == flag;
2110 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2112 u64 flags = btrfs_header_flags(eb);
2113 btrfs_set_header_flags(eb, flags | flag);
2116 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2118 u64 flags = btrfs_header_flags(eb);
2119 btrfs_set_header_flags(eb, flags & ~flag);
2122 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2124 u64 flags = btrfs_header_flags(eb);
2125 return flags >> BTRFS_BACKREF_REV_SHIFT;
2128 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2131 u64 flags = btrfs_header_flags(eb);
2132 flags &= ~BTRFS_BACKREF_REV_MASK;
2133 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2134 btrfs_set_header_flags(eb, flags);
2137 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2139 return btrfs_header_level(eb) == 0;
2142 /* struct btrfs_root_item */
2143 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2145 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2146 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2147 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2149 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2151 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2152 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
2153 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2154 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2155 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2156 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2157 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2158 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2159 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2161 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2163 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2165 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2167 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2169 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2172 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2174 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2177 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2179 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2182 /* struct btrfs_root_backup */
2183 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2185 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2187 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2188 tree_root_level, 8);
2190 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2192 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2193 chunk_root_gen, 64);
2194 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2195 chunk_root_level, 8);
2197 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2199 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2200 extent_root_gen, 64);
2201 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2202 extent_root_level, 8);
2204 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2206 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2208 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2211 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2213 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2215 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2218 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2220 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2222 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2223 csum_root_level, 8);
2224 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2226 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2228 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2231 /* struct btrfs_balance_item */
2232 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2234 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2235 const struct btrfs_balance_item *bi,
2236 struct btrfs_disk_balance_args *ba)
2238 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2241 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2242 struct btrfs_balance_item *bi,
2243 const struct btrfs_disk_balance_args *ba)
2245 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2248 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2249 const struct btrfs_balance_item *bi,
2250 struct btrfs_disk_balance_args *ba)
2252 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2255 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2256 struct btrfs_balance_item *bi,
2257 const struct btrfs_disk_balance_args *ba)
2259 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2262 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2263 const struct btrfs_balance_item *bi,
2264 struct btrfs_disk_balance_args *ba)
2266 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2269 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2270 struct btrfs_balance_item *bi,
2271 const struct btrfs_disk_balance_args *ba)
2273 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2277 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2278 const struct btrfs_disk_balance_args *disk)
2280 memset(cpu, 0, sizeof(*cpu));
2282 cpu->profiles = le64_to_cpu(disk->profiles);
2283 cpu->usage = le64_to_cpu(disk->usage);
2284 cpu->devid = le64_to_cpu(disk->devid);
2285 cpu->pstart = le64_to_cpu(disk->pstart);
2286 cpu->pend = le64_to_cpu(disk->pend);
2287 cpu->vstart = le64_to_cpu(disk->vstart);
2288 cpu->vend = le64_to_cpu(disk->vend);
2289 cpu->target = le64_to_cpu(disk->target);
2290 cpu->flags = le64_to_cpu(disk->flags);
2291 cpu->limit = le64_to_cpu(disk->limit);
2292 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2293 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2297 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2298 const struct btrfs_balance_args *cpu)
2300 memset(disk, 0, sizeof(*disk));
2302 disk->profiles = cpu_to_le64(cpu->profiles);
2303 disk->usage = cpu_to_le64(cpu->usage);
2304 disk->devid = cpu_to_le64(cpu->devid);
2305 disk->pstart = cpu_to_le64(cpu->pstart);
2306 disk->pend = cpu_to_le64(cpu->pend);
2307 disk->vstart = cpu_to_le64(cpu->vstart);
2308 disk->vend = cpu_to_le64(cpu->vend);
2309 disk->target = cpu_to_le64(cpu->target);
2310 disk->flags = cpu_to_le64(cpu->flags);
2311 disk->limit = cpu_to_le64(cpu->limit);
2312 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2313 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2316 /* struct btrfs_super_block */
2317 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2318 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2319 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2321 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2322 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2323 struct btrfs_super_block, sys_chunk_array_size, 32);
2324 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2325 struct btrfs_super_block, chunk_root_generation, 64);
2326 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2328 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2330 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2331 chunk_root_level, 8);
2332 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2334 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2335 log_root_transid, 64);
2336 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2338 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2340 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2342 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2344 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2346 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2348 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2349 root_dir_objectid, 64);
2350 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2352 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2354 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2355 compat_ro_flags, 64);
2356 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2357 incompat_flags, 64);
2358 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2360 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2361 cache_generation, 64);
2362 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2363 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2364 uuid_tree_generation, 64);
2366 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2367 const char *btrfs_super_csum_name(u16 csum_type);
2368 const char *btrfs_super_csum_driver(u16 csum_type);
2369 size_t __attribute_const__ btrfs_get_num_csums(void);
2373 * The leaf data grows from end-to-front in the node.
2374 * this returns the address of the start of the last item,
2375 * which is the stop of the leaf data stack
2377 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2379 u32 nr = btrfs_header_nritems(leaf);
2382 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2383 return btrfs_item_offset_nr(leaf, nr - 1);
2386 /* struct btrfs_file_extent_item */
2387 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2389 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2390 struct btrfs_file_extent_item, disk_bytenr, 64);
2391 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2392 struct btrfs_file_extent_item, offset, 64);
2393 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2394 struct btrfs_file_extent_item, generation, 64);
2395 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2396 struct btrfs_file_extent_item, num_bytes, 64);
2397 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2398 struct btrfs_file_extent_item, ram_bytes, 64);
2399 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2400 struct btrfs_file_extent_item, disk_num_bytes, 64);
2401 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2402 struct btrfs_file_extent_item, compression, 8);
2404 static inline unsigned long
2405 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2407 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2410 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2412 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2415 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2416 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2418 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2420 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2421 disk_num_bytes, 64);
2422 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2424 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2426 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2428 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2430 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2432 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2433 other_encoding, 16);
2436 * this returns the number of bytes used by the item on disk, minus the
2437 * size of any extent headers. If a file is compressed on disk, this is
2438 * the compressed size
2440 static inline u32 btrfs_file_extent_inline_item_len(
2441 const struct extent_buffer *eb,
2442 struct btrfs_item *e)
2444 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2447 /* btrfs_qgroup_status_item */
2448 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2450 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2452 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2454 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2457 /* btrfs_qgroup_info_item */
2458 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2460 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2461 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2463 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2464 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2467 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2468 struct btrfs_qgroup_info_item, generation, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2471 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2472 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2475 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2476 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2478 /* btrfs_qgroup_limit_item */
2479 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2481 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2483 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2485 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2487 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2490 /* btrfs_dev_replace_item */
2491 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2492 struct btrfs_dev_replace_item, src_devid, 64);
2493 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2494 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2496 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2498 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2500 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2502 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2503 num_write_errors, 64);
2504 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2505 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2507 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2509 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2512 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2513 struct btrfs_dev_replace_item, src_devid, 64);
2514 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2515 struct btrfs_dev_replace_item,
2516 cont_reading_from_srcdev_mode, 64);
2517 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2518 struct btrfs_dev_replace_item, replace_state, 64);
2519 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2520 struct btrfs_dev_replace_item, time_started, 64);
2521 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2522 struct btrfs_dev_replace_item, time_stopped, 64);
2523 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2524 struct btrfs_dev_replace_item, num_write_errors, 64);
2525 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2526 struct btrfs_dev_replace_item,
2527 num_uncorrectable_read_errors, 64);
2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2529 struct btrfs_dev_replace_item, cursor_left, 64);
2530 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2531 struct btrfs_dev_replace_item, cursor_right, 64);
2533 /* helper function to cast into the data area of the leaf. */
2534 #define btrfs_item_ptr(leaf, slot, type) \
2535 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2536 btrfs_item_offset_nr(leaf, slot)))
2538 #define btrfs_item_ptr_offset(leaf, slot) \
2539 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2540 btrfs_item_offset_nr(leaf, slot)))
2542 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2544 return crc32c(crc, address, length);
2547 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2549 put_unaligned_le32(~crc, result);
2552 static inline u64 btrfs_name_hash(const char *name, int len)
2554 return crc32c((u32)~1, name, len);
2558 * Figure the key offset of an extended inode ref
2560 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2563 return (u64) crc32c(parent_objectid, name, len);
2566 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2568 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2573 enum btrfs_inline_ref_type {
2574 BTRFS_REF_TYPE_INVALID,
2575 BTRFS_REF_TYPE_BLOCK,
2576 BTRFS_REF_TYPE_DATA,
2580 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2581 struct btrfs_extent_inline_ref *iref,
2582 enum btrfs_inline_ref_type is_data);
2583 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2586 * Take the number of bytes to be checksummmed and figure out how many leaves
2587 * it would require to store the csums for that many bytes.
2589 static inline u64 btrfs_csum_bytes_to_leaves(
2590 const struct btrfs_fs_info *fs_info, u64 csum_bytes)
2592 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
2594 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
2598 * Use this if we would be adding new items, as we could split nodes as we cow
2601 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2604 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2608 * Doing a truncate or a modification won't result in new nodes or leaves, just
2609 * what we need for COW.
2611 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2614 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2617 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2618 u64 start, u64 num_bytes);
2619 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2620 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2621 unsigned long count);
2622 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2623 struct btrfs_delayed_ref_root *delayed_refs,
2624 struct btrfs_delayed_ref_head *head);
2625 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2626 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2627 struct btrfs_fs_info *fs_info, u64 bytenr,
2628 u64 offset, int metadata, u64 *refs, u64 *flags);
2629 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2631 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2632 u64 bytenr, u64 num_bytes);
2633 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2634 int btrfs_cross_ref_exist(struct btrfs_root *root,
2635 u64 objectid, u64 offset, u64 bytenr, bool strict);
2636 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2637 struct btrfs_root *root,
2638 u64 parent, u64 root_objectid,
2639 const struct btrfs_disk_key *key,
2640 int level, u64 hint,
2642 enum btrfs_lock_nesting nest);
2643 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2644 struct btrfs_root *root,
2645 struct extent_buffer *buf,
2646 u64 parent, int last_ref);
2647 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2648 struct btrfs_root *root, u64 owner,
2649 u64 offset, u64 ram_bytes,
2650 struct btrfs_key *ins);
2651 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2652 u64 root_objectid, u64 owner, u64 offset,
2653 struct btrfs_key *ins);
2654 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2655 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2656 struct btrfs_key *ins, int is_data, int delalloc);
2657 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2658 struct extent_buffer *buf, int full_backref);
2659 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2660 struct extent_buffer *buf, int full_backref);
2661 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2662 struct extent_buffer *eb, u64 flags,
2663 int level, int is_data);
2664 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2666 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2667 u64 start, u64 len, int delalloc);
2668 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2670 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2671 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2672 struct btrfs_ref *generic_ref);
2674 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2675 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2678 * Different levels for to flush space when doing space reservations.
2680 * The higher the level, the more methods we try to reclaim space.
2682 enum btrfs_reserve_flush_enum {
2683 /* If we are in the transaction, we can't flush anything.*/
2684 BTRFS_RESERVE_NO_FLUSH,
2688 * - Running delayed inode items
2689 * - Allocating a new chunk
2691 BTRFS_RESERVE_FLUSH_LIMIT,
2695 * - Running delayed inode items
2696 * - Running delayed refs
2697 * - Running delalloc and waiting for ordered extents
2698 * - Allocating a new chunk
2700 BTRFS_RESERVE_FLUSH_EVICT,
2703 * Flush space by above mentioned methods and by:
2704 * - Running delayed iputs
2705 * - Commiting transaction
2707 * Can be interruped by fatal signal.
2709 BTRFS_RESERVE_FLUSH_DATA,
2710 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2711 BTRFS_RESERVE_FLUSH_ALL,
2714 * Pretty much the same as FLUSH_ALL, but can also steal space from
2717 * Can be interruped by fatal signal.
2719 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2722 enum btrfs_flush_state {
2723 FLUSH_DELAYED_ITEMS_NR = 1,
2724 FLUSH_DELAYED_ITEMS = 2,
2725 FLUSH_DELAYED_REFS_NR = 3,
2726 FLUSH_DELAYED_REFS = 4,
2728 FLUSH_DELALLOC_WAIT = 6,
2730 ALLOC_CHUNK_FORCE = 8,
2731 RUN_DELAYED_IPUTS = 9,
2735 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2736 struct btrfs_block_rsv *rsv,
2737 int nitems, bool use_global_rsv);
2738 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2739 struct btrfs_block_rsv *rsv);
2740 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2742 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2743 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2744 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2745 u64 start, u64 end);
2746 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2747 u64 num_bytes, u64 *actual_bytes);
2748 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2750 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2751 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2752 struct btrfs_fs_info *fs_info);
2753 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2754 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2755 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2758 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2760 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2761 int btrfs_previous_item(struct btrfs_root *root,
2762 struct btrfs_path *path, u64 min_objectid,
2764 int btrfs_previous_extent_item(struct btrfs_root *root,
2765 struct btrfs_path *path, u64 min_objectid);
2766 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2767 struct btrfs_path *path,
2768 const struct btrfs_key *new_key);
2769 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2770 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2771 struct btrfs_key *key, int lowest_level,
2773 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2774 struct btrfs_path *path,
2776 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2779 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2780 struct btrfs_root *root, struct extent_buffer *buf,
2781 struct extent_buffer *parent, int parent_slot,
2782 struct extent_buffer **cow_ret,
2783 enum btrfs_lock_nesting nest);
2784 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2785 struct btrfs_root *root,
2786 struct extent_buffer *buf,
2787 struct extent_buffer **cow_ret, u64 new_root_objectid);
2788 int btrfs_block_can_be_shared(struct btrfs_root *root,
2789 struct extent_buffer *buf);
2790 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2791 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2792 int btrfs_split_item(struct btrfs_trans_handle *trans,
2793 struct btrfs_root *root,
2794 struct btrfs_path *path,
2795 const struct btrfs_key *new_key,
2796 unsigned long split_offset);
2797 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2798 struct btrfs_root *root,
2799 struct btrfs_path *path,
2800 const struct btrfs_key *new_key);
2801 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2802 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2803 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2804 const struct btrfs_key *key, struct btrfs_path *p,
2805 int ins_len, int cow);
2806 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2807 struct btrfs_path *p, u64 time_seq);
2808 int btrfs_search_slot_for_read(struct btrfs_root *root,
2809 const struct btrfs_key *key,
2810 struct btrfs_path *p, int find_higher,
2812 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2813 struct btrfs_root *root, struct extent_buffer *parent,
2814 int start_slot, u64 *last_ret,
2815 struct btrfs_key *progress);
2816 void btrfs_release_path(struct btrfs_path *p);
2817 struct btrfs_path *btrfs_alloc_path(void);
2818 void btrfs_free_path(struct btrfs_path *p);
2820 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2821 struct btrfs_path *path, int slot, int nr);
2822 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2823 struct btrfs_root *root,
2824 struct btrfs_path *path)
2826 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2829 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2830 const struct btrfs_key *cpu_key, u32 *data_size,
2832 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2833 const struct btrfs_key *key, void *data, u32 data_size);
2834 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2835 struct btrfs_root *root,
2836 struct btrfs_path *path,
2837 const struct btrfs_key *cpu_key, u32 *data_size,
2840 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2841 struct btrfs_root *root,
2842 struct btrfs_path *path,
2843 const struct btrfs_key *key,
2846 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2849 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2850 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2851 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2853 static inline int btrfs_next_old_item(struct btrfs_root *root,
2854 struct btrfs_path *p, u64 time_seq)
2857 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2858 return btrfs_next_old_leaf(root, p, time_seq);
2861 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2863 return btrfs_next_old_item(root, p, 0);
2865 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2866 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2868 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2869 struct btrfs_root *root,
2870 struct extent_buffer *node,
2871 struct extent_buffer *parent);
2872 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2875 * Do it this way so we only ever do one test_bit in the normal case.
2877 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2878 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2886 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2887 * anything except sleeping. This function is used to check the status of
2890 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2892 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2895 /* tree mod log functions from ctree.c */
2896 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2897 struct seq_list *elem);
2898 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2899 struct seq_list *elem);
2900 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2903 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2904 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2906 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2907 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2909 int btrfs_del_root(struct btrfs_trans_handle *trans,
2910 const struct btrfs_key *key);
2911 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2912 const struct btrfs_key *key,
2913 struct btrfs_root_item *item);
2914 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2915 struct btrfs_root *root,
2916 struct btrfs_key *key,
2917 struct btrfs_root_item *item);
2918 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2919 struct btrfs_path *path, struct btrfs_root_item *root_item,
2920 struct btrfs_key *root_key);
2921 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2922 void btrfs_set_root_node(struct btrfs_root_item *item,
2923 struct extent_buffer *node);
2924 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2925 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2926 struct btrfs_root *root);
2929 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2931 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2933 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2936 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2937 const char *name, int name_len);
2938 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2939 int name_len, struct btrfs_inode *dir,
2940 struct btrfs_key *location, u8 type, u64 index);
2941 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2942 struct btrfs_root *root,
2943 struct btrfs_path *path, u64 dir,
2944 const char *name, int name_len,
2946 struct btrfs_dir_item *
2947 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2948 struct btrfs_root *root,
2949 struct btrfs_path *path, u64 dir,
2950 u64 objectid, const char *name, int name_len,
2952 struct btrfs_dir_item *
2953 btrfs_search_dir_index_item(struct btrfs_root *root,
2954 struct btrfs_path *path, u64 dirid,
2955 const char *name, int name_len);
2956 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2957 struct btrfs_root *root,
2958 struct btrfs_path *path,
2959 struct btrfs_dir_item *di);
2960 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2961 struct btrfs_root *root,
2962 struct btrfs_path *path, u64 objectid,
2963 const char *name, u16 name_len,
2964 const void *data, u16 data_len);
2965 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2966 struct btrfs_root *root,
2967 struct btrfs_path *path, u64 dir,
2968 const char *name, u16 name_len,
2970 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2971 struct btrfs_path *path,
2976 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2977 struct btrfs_root *root, u64 offset);
2978 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2979 struct btrfs_root *root, u64 offset);
2980 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2983 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2984 struct btrfs_root *root,
2985 const char *name, int name_len,
2986 u64 inode_objectid, u64 ref_objectid, u64 index);
2987 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2988 struct btrfs_root *root,
2989 const char *name, int name_len,
2990 u64 inode_objectid, u64 ref_objectid, u64 *index);
2991 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2992 struct btrfs_root *root,
2993 struct btrfs_path *path, u64 objectid);
2994 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2995 *root, struct btrfs_path *path,
2996 struct btrfs_key *location, int mod);
2998 struct btrfs_inode_extref *
2999 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3000 struct btrfs_root *root,
3001 struct btrfs_path *path,
3002 const char *name, int name_len,
3003 u64 inode_objectid, u64 ref_objectid, int ins_len,
3006 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
3007 int slot, const char *name,
3009 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
3010 struct extent_buffer *leaf, int slot, u64 ref_objectid,
3011 const char *name, int name_len);
3013 struct btrfs_dio_private;
3014 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3015 struct btrfs_root *root, u64 bytenr, u64 len);
3016 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst);
3017 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3018 struct btrfs_root *root,
3019 u64 objectid, u64 pos,
3020 u64 disk_offset, u64 disk_num_bytes,
3021 u64 num_bytes, u64 offset, u64 ram_bytes,
3022 u8 compression, u8 encryption, u16 other_encoding);
3023 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3024 struct btrfs_root *root,
3025 struct btrfs_path *path, u64 objectid,
3026 u64 bytenr, int mod);
3027 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3028 struct btrfs_root *root,
3029 struct btrfs_ordered_sum *sums);
3030 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
3031 u64 file_start, int contig);
3032 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3033 struct list_head *list, int search_commit);
3034 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3035 const struct btrfs_path *path,
3036 struct btrfs_file_extent_item *fi,
3037 const bool new_inline,
3038 struct extent_map *em);
3039 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
3041 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
3043 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
3044 u64 btrfs_file_extent_end(const struct btrfs_path *path);
3047 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
3048 int mirror_num, unsigned long bio_flags);
3049 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset,
3050 struct page *page, u64 start, u64 end, int mirror);
3051 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3052 u64 start, u64 len);
3053 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3054 u64 *orig_start, u64 *orig_block_len,
3055 u64 *ram_bytes, bool strict);
3057 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3058 struct btrfs_inode *inode);
3059 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3060 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3061 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3062 struct btrfs_root *root,
3063 struct btrfs_inode *dir, struct btrfs_inode *inode,
3064 const char *name, int name_len);
3065 int btrfs_add_link(struct btrfs_trans_handle *trans,
3066 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3067 const char *name, int name_len, int add_backref, u64 index);
3068 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3069 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
3071 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3072 struct btrfs_root *root,
3073 struct btrfs_inode *inode, u64 new_size,
3076 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3077 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr,
3078 bool in_reclaim_context);
3079 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
3080 unsigned int extra_bits,
3081 struct extent_state **cached_state);
3082 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3083 struct btrfs_root *new_root,
3084 struct btrfs_root *parent_root,
3086 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3088 void btrfs_clear_delalloc_extent(struct inode *inode,
3089 struct extent_state *state, unsigned *bits);
3090 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3091 struct extent_state *other);
3092 void btrfs_split_delalloc_extent(struct inode *inode,
3093 struct extent_state *orig, u64 split);
3094 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3095 unsigned long bio_flags);
3096 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3097 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3098 int btrfs_readpage(struct file *file, struct page *page);
3099 void btrfs_evict_inode(struct inode *inode);
3100 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3101 struct inode *btrfs_alloc_inode(struct super_block *sb);
3102 void btrfs_destroy_inode(struct inode *inode);
3103 void btrfs_free_inode(struct inode *inode);
3104 int btrfs_drop_inode(struct inode *inode);
3105 int __init btrfs_init_cachep(void);
3106 void __cold btrfs_destroy_cachep(void);
3107 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3108 struct btrfs_root *root, struct btrfs_path *path);
3109 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3110 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3111 struct page *page, size_t pg_offset,
3112 u64 start, u64 end);
3113 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root, struct btrfs_inode *inode);
3115 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3116 struct btrfs_root *root, struct btrfs_inode *inode);
3117 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3118 struct btrfs_inode *inode);
3119 int btrfs_orphan_cleanup(struct btrfs_root *root);
3120 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size);
3121 void btrfs_add_delayed_iput(struct inode *inode);
3122 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3123 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3124 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3125 u64 start, u64 num_bytes, u64 min_size,
3126 loff_t actual_len, u64 *alloc_hint);
3127 int btrfs_prealloc_file_range_trans(struct inode *inode,
3128 struct btrfs_trans_handle *trans, int mode,
3129 u64 start, u64 num_bytes, u64 min_size,
3130 loff_t actual_len, u64 *alloc_hint);
3131 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3132 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3133 struct writeback_control *wbc);
3134 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3135 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3136 u64 end, int uptodate);
3137 extern const struct dentry_operations btrfs_dentry_operations;
3138 extern const struct iomap_ops btrfs_dio_iomap_ops;
3139 extern const struct iomap_dio_ops btrfs_dio_ops;
3141 /* Inode locking type flags, by default the exclusive lock is taken */
3142 #define BTRFS_ILOCK_SHARED (1U << 0)
3143 #define BTRFS_ILOCK_TRY (1U << 1)
3145 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags);
3146 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags);
3147 void btrfs_update_inode_bytes(struct btrfs_inode *inode,
3148 const u64 add_bytes,
3149 const u64 del_bytes);
3152 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3153 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3154 int btrfs_ioctl_get_supported_features(void __user *arg);
3155 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3156 int __pure btrfs_is_empty_uuid(u8 *uuid);
3157 int btrfs_defrag_file(struct inode *inode, struct file *file,
3158 struct btrfs_ioctl_defrag_range_args *range,
3159 u64 newer_than, unsigned long max_pages);
3160 void btrfs_get_block_group_info(struct list_head *groups_list,
3161 struct btrfs_ioctl_space_info *space);
3162 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3163 struct btrfs_ioctl_balance_args *bargs);
3164 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3165 enum btrfs_exclusive_operation type);
3166 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3169 int __init btrfs_auto_defrag_init(void);
3170 void __cold btrfs_auto_defrag_exit(void);
3171 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3172 struct btrfs_inode *inode);
3173 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3174 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3175 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3176 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3178 extern const struct file_operations btrfs_file_operations;
3179 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3180 struct btrfs_root *root, struct btrfs_inode *inode,
3181 struct btrfs_drop_extents_args *args);
3182 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path,
3183 const u64 start, const u64 end,
3184 struct btrfs_replace_extent_info *extent_info,
3185 struct btrfs_trans_handle **trans_out);
3186 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3187 struct btrfs_inode *inode, u64 start, u64 end);
3188 int btrfs_release_file(struct inode *inode, struct file *file);
3189 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3190 size_t num_pages, loff_t pos, size_t write_bytes,
3191 struct extent_state **cached, bool noreserve);
3192 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3193 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3194 size_t *write_bytes);
3195 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3198 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3199 struct btrfs_root *root);
3202 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3203 unsigned long new_flags);
3204 int btrfs_sync_fs(struct super_block *sb, int wait);
3205 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3206 u64 subvol_objectid);
3208 static inline __printf(2, 3) __cold
3209 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3213 #ifdef CONFIG_PRINTK
3216 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3218 #define btrfs_printk(fs_info, fmt, args...) \
3219 btrfs_no_printk(fs_info, fmt, ##args)
3222 #define btrfs_emerg(fs_info, fmt, args...) \
3223 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3224 #define btrfs_alert(fs_info, fmt, args...) \
3225 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3226 #define btrfs_crit(fs_info, fmt, args...) \
3227 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3228 #define btrfs_err(fs_info, fmt, args...) \
3229 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3230 #define btrfs_warn(fs_info, fmt, args...) \
3231 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3232 #define btrfs_notice(fs_info, fmt, args...) \
3233 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3234 #define btrfs_info(fs_info, fmt, args...) \
3235 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3238 * Wrappers that use printk_in_rcu
3240 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3241 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3242 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3243 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3244 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3245 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3246 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3247 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3248 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3249 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3250 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3251 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3252 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3253 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3256 * Wrappers that use a ratelimited printk_in_rcu
3258 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3259 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3260 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3261 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3262 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3263 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3264 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3265 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3266 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3267 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3268 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3269 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3270 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3271 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3274 * Wrappers that use a ratelimited printk
3276 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3277 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3278 #define btrfs_alert_rl(fs_info, fmt, args...) \
3279 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3280 #define btrfs_crit_rl(fs_info, fmt, args...) \
3281 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3282 #define btrfs_err_rl(fs_info, fmt, args...) \
3283 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3284 #define btrfs_warn_rl(fs_info, fmt, args...) \
3285 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3286 #define btrfs_notice_rl(fs_info, fmt, args...) \
3287 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3288 #define btrfs_info_rl(fs_info, fmt, args...) \
3289 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3291 #if defined(CONFIG_DYNAMIC_DEBUG)
3292 #define btrfs_debug(fs_info, fmt, args...) \
3293 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3294 fs_info, KERN_DEBUG fmt, ##args)
3295 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3296 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3297 fs_info, KERN_DEBUG fmt, ##args)
3298 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3299 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3300 fs_info, KERN_DEBUG fmt, ##args)
3301 #define btrfs_debug_rl(fs_info, fmt, args...) \
3302 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3303 fs_info, KERN_DEBUG fmt, ##args)
3304 #elif defined(DEBUG)
3305 #define btrfs_debug(fs_info, fmt, args...) \
3306 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3307 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3308 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3309 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3310 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3311 #define btrfs_debug_rl(fs_info, fmt, args...) \
3312 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3314 #define btrfs_debug(fs_info, fmt, args...) \
3315 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3316 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3317 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3318 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3319 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3320 #define btrfs_debug_rl(fs_info, fmt, args...) \
3321 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3324 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3327 btrfs_printk(fs_info, fmt, ##args); \
3328 rcu_read_unlock(); \
3331 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3334 btrfs_no_printk(fs_info, fmt, ##args); \
3335 rcu_read_unlock(); \
3338 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3340 static DEFINE_RATELIMIT_STATE(_rs, \
3341 DEFAULT_RATELIMIT_INTERVAL, \
3342 DEFAULT_RATELIMIT_BURST); \
3343 if (__ratelimit(&_rs)) \
3344 btrfs_printk(fs_info, fmt, ##args); \
3347 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3350 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3351 rcu_read_unlock(); \
3354 #ifdef CONFIG_BTRFS_ASSERT
3356 static inline void assertfail(const char *expr, const char *file, int line)
3358 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3362 #define ASSERT(expr) \
3363 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3366 static inline void assertfail(const char *expr, const char* file, int line) { }
3367 #define ASSERT(expr) (void)(expr)
3371 * Get the correct offset inside the page of extent buffer.
3373 * @eb: target extent buffer
3374 * @start: offset inside the extent buffer
3376 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases.
3378 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb,
3379 unsigned long offset)
3382 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned
3383 * to PAGE_SIZE, thus adding it won't cause any difference.
3385 * For sectorsize < PAGE_SIZE, we must only read the data that belongs
3386 * to the eb, thus we have to take the eb->start into consideration.
3388 return offset_in_page(offset + eb->start);
3391 static inline unsigned long get_eb_page_index(unsigned long offset)
3394 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough.
3396 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE,
3397 * and have ensured that all tree blocks are contained in one page,
3398 * thus we always get index == 0.
3400 return offset >> PAGE_SHIFT;
3404 * Use that for functions that are conditionally exported for sanity tests but
3407 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3408 #define EXPORT_FOR_TESTS static
3410 #define EXPORT_FOR_TESTS
3414 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3417 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3422 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3423 unsigned int line, int errno, const char *fmt, ...);
3425 const char * __attribute_const__ btrfs_decode_error(int errno);
3428 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3429 const char *function,
3430 unsigned int line, int errno);
3433 * Call btrfs_abort_transaction as early as possible when an error condition is
3434 * detected, that way the exact line number is reported.
3436 #define btrfs_abort_transaction(trans, errno) \
3438 /* Report first abort since mount */ \
3439 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3440 &((trans)->fs_info->fs_state))) { \
3441 if ((errno) != -EIO && (errno) != -EROFS) { \
3442 WARN(1, KERN_DEBUG \
3443 "BTRFS: Transaction aborted (error %d)\n", \
3446 btrfs_debug((trans)->fs_info, \
3447 "Transaction aborted (error %d)", \
3451 __btrfs_abort_transaction((trans), __func__, \
3452 __LINE__, (errno)); \
3455 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3457 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3458 (errno), fmt, ##args); \
3463 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3464 unsigned int line, int errno, const char *fmt, ...);
3466 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3467 * will panic(). Otherwise we BUG() here.
3469 #define btrfs_panic(fs_info, errno, fmt, args...) \
3471 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3476 /* compatibility and incompatibility defines */
3478 #define btrfs_set_fs_incompat(__fs_info, opt) \
3479 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3482 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3483 u64 flag, const char* name)
3485 struct btrfs_super_block *disk_super;
3488 disk_super = fs_info->super_copy;
3489 features = btrfs_super_incompat_flags(disk_super);
3490 if (!(features & flag)) {
3491 spin_lock(&fs_info->super_lock);
3492 features = btrfs_super_incompat_flags(disk_super);
3493 if (!(features & flag)) {
3495 btrfs_set_super_incompat_flags(disk_super, features);
3497 "setting incompat feature flag for %s (0x%llx)",
3500 spin_unlock(&fs_info->super_lock);
3504 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3505 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3508 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3509 u64 flag, const char* name)
3511 struct btrfs_super_block *disk_super;
3514 disk_super = fs_info->super_copy;
3515 features = btrfs_super_incompat_flags(disk_super);
3516 if (features & flag) {
3517 spin_lock(&fs_info->super_lock);
3518 features = btrfs_super_incompat_flags(disk_super);
3519 if (features & flag) {
3521 btrfs_set_super_incompat_flags(disk_super, features);
3523 "clearing incompat feature flag for %s (0x%llx)",
3526 spin_unlock(&fs_info->super_lock);
3530 #define btrfs_fs_incompat(fs_info, opt) \
3531 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3533 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3535 struct btrfs_super_block *disk_super;
3536 disk_super = fs_info->super_copy;
3537 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3540 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3541 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3544 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3545 u64 flag, const char *name)
3547 struct btrfs_super_block *disk_super;
3550 disk_super = fs_info->super_copy;
3551 features = btrfs_super_compat_ro_flags(disk_super);
3552 if (!(features & flag)) {
3553 spin_lock(&fs_info->super_lock);
3554 features = btrfs_super_compat_ro_flags(disk_super);
3555 if (!(features & flag)) {
3557 btrfs_set_super_compat_ro_flags(disk_super, features);
3559 "setting compat-ro feature flag for %s (0x%llx)",
3562 spin_unlock(&fs_info->super_lock);
3566 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3567 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3570 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3571 u64 flag, const char *name)
3573 struct btrfs_super_block *disk_super;
3576 disk_super = fs_info->super_copy;
3577 features = btrfs_super_compat_ro_flags(disk_super);
3578 if (features & flag) {
3579 spin_lock(&fs_info->super_lock);
3580 features = btrfs_super_compat_ro_flags(disk_super);
3581 if (features & flag) {
3583 btrfs_set_super_compat_ro_flags(disk_super, features);
3585 "clearing compat-ro feature flag for %s (0x%llx)",
3588 spin_unlock(&fs_info->super_lock);
3592 #define btrfs_fs_compat_ro(fs_info, opt) \
3593 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3595 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3597 struct btrfs_super_block *disk_super;
3598 disk_super = fs_info->super_copy;
3599 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3603 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3604 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3605 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3606 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3607 struct inode *inode, struct inode *dir);
3609 #define btrfs_get_acl NULL
3610 #define btrfs_set_acl NULL
3611 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3612 struct inode *inode, struct inode *dir)
3619 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3620 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3621 struct btrfs_root *root);
3622 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3623 struct btrfs_root *root);
3624 int btrfs_recover_relocation(struct btrfs_root *root);
3625 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3626 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3627 struct btrfs_root *root, struct extent_buffer *buf,
3628 struct extent_buffer *cow);
3629 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3630 u64 *bytes_to_reserve);
3631 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3632 struct btrfs_pending_snapshot *pending);
3633 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3634 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3636 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3639 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3640 u64 end, struct btrfs_scrub_progress *progress,
3641 int readonly, int is_dev_replace);
3642 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3643 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3644 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3645 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3646 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3647 struct btrfs_scrub_progress *progress);
3648 static inline void btrfs_init_full_stripe_locks_tree(
3649 struct btrfs_full_stripe_locks_tree *locks_root)
3651 locks_root->root = RB_ROOT;
3652 mutex_init(&locks_root->lock);
3656 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3657 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3658 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3660 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3662 btrfs_bio_counter_sub(fs_info, 1);
3666 struct reada_control {
3667 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3668 struct btrfs_key key_start;
3669 struct btrfs_key key_end; /* exclusive */
3672 wait_queue_head_t wait;
3674 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3675 struct btrfs_key *start, struct btrfs_key *end);
3676 int btrfs_reada_wait(void *handle);
3677 void btrfs_reada_detach(void *handle);
3678 int btree_readahead_hook(struct extent_buffer *eb, int err);
3679 void btrfs_reada_remove_dev(struct btrfs_device *dev);
3680 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev);
3682 static inline int is_fstree(u64 rootid)
3684 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3685 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3686 !btrfs_qgroup_level(rootid)))
3691 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3693 return signal_pending(current);
3696 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3698 /* Sanity test specific functions */
3699 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3700 void btrfs_test_destroy_inode(struct inode *inode);
3701 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3703 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3706 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3712 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
3714 return fs_info->zoned != 0;