1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/unaligned.h>
21 #include <linux/pagemap.h>
22 #include <linux/btrfs.h>
23 #include <linux/btrfs_tree.h>
24 #include <linux/workqueue.h>
25 #include <linux/security.h>
26 #include <linux/sizes.h>
27 #include <linux/dynamic_debug.h>
28 #include <linux/refcount.h>
29 #include <linux/crc32c.h>
30 #include <linux/iomap.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
38 struct btrfs_trans_handle;
39 struct btrfs_transaction;
40 struct btrfs_pending_snapshot;
41 struct btrfs_delayed_ref_root;
42 struct btrfs_space_info;
43 struct btrfs_block_group;
44 extern struct kmem_cache *btrfs_trans_handle_cachep;
45 extern struct kmem_cache *btrfs_bit_radix_cachep;
46 extern struct kmem_cache *btrfs_path_cachep;
47 extern struct kmem_cache *btrfs_free_space_cachep;
48 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
49 struct btrfs_ordered_sum;
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 /* Filesystem in RO mode */
137 /* Track if a transaction abort has been reported on this filesystem */
138 BTRFS_FS_STATE_TRANS_ABORTED,
140 * Bio operations should be blocked on this filesystem because a source
141 * or target device is being destroyed as part of a device replace
143 BTRFS_FS_STATE_DEV_REPLACING,
144 /* The btrfs_fs_info created for self-tests */
145 BTRFS_FS_STATE_DUMMY_FS_INFO,
147 BTRFS_FS_STATE_NO_CSUMS,
149 /* Indicates there was an error cleaning up a log tree. */
150 BTRFS_FS_STATE_LOG_CLEANUP_ERROR,
153 #define BTRFS_BACKREF_REV_MAX 256
154 #define BTRFS_BACKREF_REV_SHIFT 56
155 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
156 BTRFS_BACKREF_REV_SHIFT)
158 #define BTRFS_OLD_BACKREF_REV 0
159 #define BTRFS_MIXED_BACKREF_REV 1
162 * every tree block (leaf or node) starts with this header.
164 struct btrfs_header {
165 /* these first four must match the super block */
166 u8 csum[BTRFS_CSUM_SIZE];
167 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
168 __le64 bytenr; /* which block this node is supposed to live in */
171 /* allowed to be different from the super from here on down */
172 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
177 } __attribute__ ((__packed__));
180 * this is a very generous portion of the super block, giving us
181 * room to translate 14 chunks with 3 stripes each.
183 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
186 * just in case we somehow lose the roots and are not able to mount,
187 * we store an array of the roots from previous transactions
190 #define BTRFS_NUM_BACKUP_ROOTS 4
191 struct btrfs_root_backup {
193 __le64 tree_root_gen;
196 __le64 chunk_root_gen;
199 __le64 extent_root_gen;
208 __le64 csum_root_gen;
218 u8 extent_root_level;
222 /* future and to align */
224 } __attribute__ ((__packed__));
226 #define BTRFS_SUPER_INFO_OFFSET SZ_64K
227 #define BTRFS_SUPER_INFO_SIZE 4096
230 * the super block basically lists the main trees of the FS
231 * it currently lacks any block count etc etc
233 struct btrfs_super_block {
234 /* the first 4 fields must match struct btrfs_header */
235 u8 csum[BTRFS_CSUM_SIZE];
236 /* FS specific UUID, visible to user */
237 u8 fsid[BTRFS_FSID_SIZE];
238 __le64 bytenr; /* this block number */
241 /* allowed to be different from the btrfs_header from here own down */
248 /* this will help find the new super based on the log root */
249 __le64 log_root_transid;
252 __le64 root_dir_objectid;
256 __le32 __unused_leafsize;
258 __le32 sys_chunk_array_size;
259 __le64 chunk_root_generation;
261 __le64 compat_ro_flags;
262 __le64 incompat_flags;
267 struct btrfs_dev_item dev_item;
269 char label[BTRFS_LABEL_SIZE];
271 __le64 cache_generation;
272 __le64 uuid_tree_generation;
274 /* the UUID written into btree blocks */
275 u8 metadata_uuid[BTRFS_FSID_SIZE];
277 /* future expansion */
279 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
280 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
282 /* Padded to 4096 bytes */
284 } __attribute__ ((__packed__));
285 static_assert(sizeof(struct btrfs_super_block) == BTRFS_SUPER_INFO_SIZE);
288 * Compat flags that we support. If any incompat flags are set other than the
289 * ones specified below then we will fail to mount
291 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
292 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
293 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
295 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
296 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
297 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID | \
298 BTRFS_FEATURE_COMPAT_RO_VERITY)
300 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
301 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
303 #define BTRFS_FEATURE_INCOMPAT_SUPP \
304 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
305 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
306 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
307 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
308 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
309 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
310 BTRFS_FEATURE_INCOMPAT_RAID56 | \
311 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
312 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
313 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
314 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
315 BTRFS_FEATURE_INCOMPAT_RAID1C34 | \
316 BTRFS_FEATURE_INCOMPAT_ZONED)
318 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
319 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
320 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
323 * A leaf is full of items. offset and size tell us where to find
324 * the item in the leaf (relative to the start of the data area)
327 struct btrfs_disk_key key;
330 } __attribute__ ((__packed__));
333 * leaves have an item area and a data area:
334 * [item0, item1....itemN] [free space] [dataN...data1, data0]
336 * The data is separate from the items to get the keys closer together
340 struct btrfs_header header;
341 struct btrfs_item items[];
342 } __attribute__ ((__packed__));
345 * all non-leaf blocks are nodes, they hold only keys and pointers to
348 struct btrfs_key_ptr {
349 struct btrfs_disk_key key;
352 } __attribute__ ((__packed__));
355 struct btrfs_header header;
356 struct btrfs_key_ptr ptrs[];
357 } __attribute__ ((__packed__));
359 /* Read ahead values for struct btrfs_path.reada */
365 * Similar to READA_FORWARD but unlike it:
367 * 1) It will trigger readahead even for leaves that are not close to
368 * each other on disk;
369 * 2) It also triggers readahead for nodes;
370 * 3) During a search, even when a node or leaf is already in memory, it
371 * will still trigger readahead for other nodes and leaves that follow
374 * This is meant to be used only when we know we are iterating over the
375 * entire tree or a very large part of it.
377 READA_FORWARD_ALWAYS,
381 * btrfs_paths remember the path taken from the root down to the leaf.
382 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
383 * to any other levels that are present.
385 * The slots array records the index of the item or block pointer
386 * used while walking the tree.
389 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
390 int slots[BTRFS_MAX_LEVEL];
391 /* if there is real range locking, this locks field will change */
392 u8 locks[BTRFS_MAX_LEVEL];
394 /* keep some upper locks as we walk down */
398 * set by btrfs_split_item, tells search_slot to keep all locks
399 * and to force calls to keep space in the nodes
401 unsigned int search_for_split:1;
402 unsigned int keep_locks:1;
403 unsigned int skip_locking:1;
404 unsigned int search_commit_root:1;
405 unsigned int need_commit_sem:1;
406 unsigned int skip_release_on_error:1;
408 * Indicate that new item (btrfs_search_slot) is extending already
409 * existing item and ins_len contains only the data size and not item
410 * header (ie. sizeof(struct btrfs_item) is not included).
412 unsigned int search_for_extension:1;
414 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
415 sizeof(struct btrfs_item))
416 struct btrfs_dev_replace {
417 u64 replace_state; /* see #define above */
418 time64_t time_started; /* seconds since 1-Jan-1970 */
419 time64_t time_stopped; /* seconds since 1-Jan-1970 */
420 atomic64_t num_write_errors;
421 atomic64_t num_uncorrectable_read_errors;
424 u64 committed_cursor_left;
425 u64 cursor_left_last_write_of_item;
428 u64 cont_reading_from_srcdev_mode; /* see #define above */
431 int item_needs_writeback;
432 struct btrfs_device *srcdev;
433 struct btrfs_device *tgtdev;
435 struct mutex lock_finishing_cancel_unmount;
436 struct rw_semaphore rwsem;
438 struct btrfs_scrub_progress scrub_progress;
440 struct percpu_counter bio_counter;
441 wait_queue_head_t replace_wait;
445 * free clusters are used to claim free space in relatively large chunks,
446 * allowing us to do less seeky writes. They are used for all metadata
447 * allocations. In ssd_spread mode they are also used for data allocations.
449 struct btrfs_free_cluster {
451 spinlock_t refill_lock;
454 /* largest extent in this cluster */
457 /* first extent starting offset */
460 /* We did a full search and couldn't create a cluster */
463 struct btrfs_block_group *block_group;
465 * when a cluster is allocated from a block group, we put the
466 * cluster onto a list in the block group so that it can
467 * be freed before the block group is freed.
469 struct list_head block_group_list;
472 enum btrfs_caching_type {
476 BTRFS_CACHE_FINISHED,
481 * Tree to record all locked full stripes of a RAID5/6 block group
483 struct btrfs_full_stripe_locks_tree {
488 /* Discard control. */
490 * Async discard uses multiple lists to differentiate the discard filter
491 * parameters. Index 0 is for completely free block groups where we need to
492 * ensure the entire block group is trimmed without being lossy. Indices
493 * afterwards represent monotonically decreasing discard filter sizes to
494 * prioritize what should be discarded next.
496 #define BTRFS_NR_DISCARD_LISTS 3
497 #define BTRFS_DISCARD_INDEX_UNUSED 0
498 #define BTRFS_DISCARD_INDEX_START 1
500 struct btrfs_discard_ctl {
501 struct workqueue_struct *discard_workers;
502 struct delayed_work work;
504 struct btrfs_block_group *block_group;
505 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
507 u64 prev_discard_time;
508 atomic_t discardable_extents;
509 atomic64_t discardable_bytes;
510 u64 max_discard_size;
514 u64 discard_extent_bytes;
515 u64 discard_bitmap_bytes;
516 atomic64_t discard_bytes_saved;
519 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
522 struct reloc_control;
524 struct btrfs_fs_devices;
525 struct btrfs_balance_control;
526 struct btrfs_delayed_root;
529 * Block group or device which contains an active swapfile. Used for preventing
530 * unsafe operations while a swapfile is active.
532 * These are sorted on (ptr, inode) (note that a block group or device can
533 * contain more than one swapfile). We compare the pointer values because we
534 * don't actually care what the object is, we just need a quick check whether
535 * the object exists in the rbtree.
537 struct btrfs_swapfile_pin {
542 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
543 * points to a struct btrfs_device.
547 * Only used when 'is_block_group' is true and it is the number of
548 * extents used by a swapfile for this block group ('ptr' field).
553 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
556 BTRFS_FS_CLOSING_START,
557 BTRFS_FS_CLOSING_DONE,
558 BTRFS_FS_LOG_RECOVERING,
560 BTRFS_FS_QUOTA_ENABLED,
561 BTRFS_FS_UPDATE_UUID_TREE_GEN,
562 BTRFS_FS_CREATING_FREE_SPACE_TREE,
566 BTRFS_FS_QUOTA_OVERRIDE,
567 /* Used to record internally whether fs has been frozen */
570 * Indicate that balance has been set up from the ioctl and is in the
571 * main phase. The fs_info::balance_ctl is initialized.
573 BTRFS_FS_BALANCE_RUNNING,
576 * Indicate that relocation of a chunk has started, it's set per chunk
577 * and is toggled between chunks.
579 BTRFS_FS_RELOC_RUNNING,
581 /* Indicate that the cleaner thread is awake and doing something. */
582 BTRFS_FS_CLEANER_RUNNING,
585 * The checksumming has an optimized version and is considered fast,
586 * so we don't need to offload checksums to workqueues.
588 BTRFS_FS_CSUM_IMPL_FAST,
590 /* Indicate that the discard workqueue can service discards. */
591 BTRFS_FS_DISCARD_RUNNING,
593 /* Indicate that we need to cleanup space cache v1 */
594 BTRFS_FS_CLEANUP_SPACE_CACHE_V1,
596 /* Indicate that we can't trust the free space tree for caching yet */
597 BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED,
599 /* Indicate whether there are any tree modification log users */
600 BTRFS_FS_TREE_MOD_LOG_USERS,
602 /* Indicate that we want the transaction kthread to commit right now. */
603 BTRFS_FS_COMMIT_TRANS,
605 #if BITS_PER_LONG == 32
606 /* Indicate if we have error/warn message printed on 32bit systems */
607 BTRFS_FS_32BIT_ERROR,
613 * Exclusive operations (device replace, resize, device add/remove, balance)
615 enum btrfs_exclusive_operation {
617 BTRFS_EXCLOP_BALANCE_PAUSED,
618 BTRFS_EXCLOP_BALANCE,
619 BTRFS_EXCLOP_DEV_ADD,
620 BTRFS_EXCLOP_DEV_REMOVE,
621 BTRFS_EXCLOP_DEV_REPLACE,
623 BTRFS_EXCLOP_SWAP_ACTIVATE,
626 struct btrfs_fs_info {
627 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
629 struct btrfs_root *tree_root;
630 struct btrfs_root *chunk_root;
631 struct btrfs_root *dev_root;
632 struct btrfs_root *fs_root;
633 struct btrfs_root *quota_root;
634 struct btrfs_root *uuid_root;
635 struct btrfs_root *data_reloc_root;
637 /* the log root tree is a directory of all the other log roots */
638 struct btrfs_root *log_root_tree;
640 /* The tree that holds the global roots (csum, extent, etc) */
641 rwlock_t global_root_lock;
642 struct rb_root global_root_tree;
644 spinlock_t fs_roots_radix_lock;
645 struct radix_tree_root fs_roots_radix;
647 /* block group cache stuff */
648 spinlock_t block_group_cache_lock;
649 u64 first_logical_byte;
650 struct rb_root block_group_cache_tree;
652 /* keep track of unallocated space */
653 atomic64_t free_chunk_space;
655 /* Track ranges which are used by log trees blocks/logged data extents */
656 struct extent_io_tree excluded_extents;
658 /* logical->physical extent mapping */
659 struct extent_map_tree mapping_tree;
662 * block reservation for extent, checksum, root tree and
663 * delayed dir index item
665 struct btrfs_block_rsv global_block_rsv;
666 /* block reservation for metadata operations */
667 struct btrfs_block_rsv trans_block_rsv;
668 /* block reservation for chunk tree */
669 struct btrfs_block_rsv chunk_block_rsv;
670 /* block reservation for delayed operations */
671 struct btrfs_block_rsv delayed_block_rsv;
672 /* block reservation for delayed refs */
673 struct btrfs_block_rsv delayed_refs_rsv;
675 struct btrfs_block_rsv empty_block_rsv;
678 u64 last_trans_committed;
680 * Generation of the last transaction used for block group relocation
681 * since the filesystem was last mounted (or 0 if none happened yet).
682 * Must be written and read while holding btrfs_fs_info::commit_root_sem.
684 u64 last_reloc_trans;
685 u64 avg_delayed_ref_runtime;
688 * this is updated to the current trans every time a full commit
689 * is required instead of the faster short fsync log commits
691 u64 last_trans_log_full_commit;
692 unsigned long mount_opt;
694 * Track requests for actions that need to be done during transaction
695 * commit (like for some mount options).
697 unsigned long pending_changes;
698 unsigned long compress_type:4;
699 unsigned int compress_level;
702 * It is a suggestive number, the read side is safe even it gets a
703 * wrong number because we will write out the data into a regular
704 * extent. The write side(mount/remount) is under ->s_umount lock,
705 * so it is also safe.
709 struct btrfs_transaction *running_transaction;
710 wait_queue_head_t transaction_throttle;
711 wait_queue_head_t transaction_wait;
712 wait_queue_head_t transaction_blocked_wait;
713 wait_queue_head_t async_submit_wait;
716 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
717 * when they are updated.
719 * Because we do not clear the flags for ever, so we needn't use
720 * the lock on the read side.
722 * We also needn't use the lock when we mount the fs, because
723 * there is no other task which will update the flag.
725 spinlock_t super_lock;
726 struct btrfs_super_block *super_copy;
727 struct btrfs_super_block *super_for_commit;
728 struct super_block *sb;
729 struct inode *btree_inode;
730 struct mutex tree_log_mutex;
731 struct mutex transaction_kthread_mutex;
732 struct mutex cleaner_mutex;
733 struct mutex chunk_mutex;
736 * this is taken to make sure we don't set block groups ro after
737 * the free space cache has been allocated on them
739 struct mutex ro_block_group_mutex;
741 /* this is used during read/modify/write to make sure
742 * no two ios are trying to mod the same stripe at the same
745 struct btrfs_stripe_hash_table *stripe_hash_table;
748 * this protects the ordered operations list only while we are
749 * processing all of the entries on it. This way we make
750 * sure the commit code doesn't find the list temporarily empty
751 * because another function happens to be doing non-waiting preflush
752 * before jumping into the main commit.
754 struct mutex ordered_operations_mutex;
756 struct rw_semaphore commit_root_sem;
758 struct rw_semaphore cleanup_work_sem;
760 struct rw_semaphore subvol_sem;
762 spinlock_t trans_lock;
764 * the reloc mutex goes with the trans lock, it is taken
765 * during commit to protect us from the relocation code
767 struct mutex reloc_mutex;
769 struct list_head trans_list;
770 struct list_head dead_roots;
771 struct list_head caching_block_groups;
773 spinlock_t delayed_iput_lock;
774 struct list_head delayed_iputs;
775 atomic_t nr_delayed_iputs;
776 wait_queue_head_t delayed_iputs_wait;
778 atomic64_t tree_mod_seq;
780 /* this protects tree_mod_log and tree_mod_seq_list */
781 rwlock_t tree_mod_log_lock;
782 struct rb_root tree_mod_log;
783 struct list_head tree_mod_seq_list;
785 atomic_t async_delalloc_pages;
788 * this is used to protect the following list -- ordered_roots.
790 spinlock_t ordered_root_lock;
793 * all fs/file tree roots in which there are data=ordered extents
794 * pending writeback are added into this list.
796 * these can span multiple transactions and basically include
797 * every dirty data page that isn't from nodatacow
799 struct list_head ordered_roots;
801 struct mutex delalloc_root_mutex;
802 spinlock_t delalloc_root_lock;
803 /* all fs/file tree roots that have delalloc inodes. */
804 struct list_head delalloc_roots;
807 * there is a pool of worker threads for checksumming during writes
808 * and a pool for checksumming after reads. This is because readers
809 * can run with FS locks held, and the writers may be waiting for
810 * those locks. We don't want ordering in the pending list to cause
811 * deadlocks, and so the two are serviced separately.
813 * A third pool does submit_bio to avoid deadlocking with the other
816 struct btrfs_workqueue *workers;
817 struct btrfs_workqueue *delalloc_workers;
818 struct btrfs_workqueue *flush_workers;
819 struct btrfs_workqueue *endio_workers;
820 struct btrfs_workqueue *endio_meta_workers;
821 struct btrfs_workqueue *endio_raid56_workers;
822 struct btrfs_workqueue *rmw_workers;
823 struct btrfs_workqueue *endio_meta_write_workers;
824 struct btrfs_workqueue *endio_write_workers;
825 struct btrfs_workqueue *endio_freespace_worker;
826 struct btrfs_workqueue *caching_workers;
829 * fixup workers take dirty pages that didn't properly go through
830 * the cow mechanism and make them safe to write. It happens
831 * for the sys_munmap function call path
833 struct btrfs_workqueue *fixup_workers;
834 struct btrfs_workqueue *delayed_workers;
836 struct task_struct *transaction_kthread;
837 struct task_struct *cleaner_kthread;
838 u32 thread_pool_size;
840 struct kobject *space_info_kobj;
841 struct kobject *qgroups_kobj;
843 /* used to keep from writing metadata until there is a nice batch */
844 struct percpu_counter dirty_metadata_bytes;
845 struct percpu_counter delalloc_bytes;
846 struct percpu_counter ordered_bytes;
847 s32 dirty_metadata_batch;
850 struct list_head dirty_cowonly_roots;
852 struct btrfs_fs_devices *fs_devices;
855 * The space_info list is effectively read only after initial
856 * setup. It is populated at mount time and cleaned up after
857 * all block groups are removed. RCU is used to protect it.
859 struct list_head space_info;
861 struct btrfs_space_info *data_sinfo;
863 struct reloc_control *reloc_ctl;
865 /* data_alloc_cluster is only used in ssd_spread mode */
866 struct btrfs_free_cluster data_alloc_cluster;
868 /* all metadata allocations go through this cluster */
869 struct btrfs_free_cluster meta_alloc_cluster;
871 /* auto defrag inodes go here */
872 spinlock_t defrag_inodes_lock;
873 struct rb_root defrag_inodes;
874 atomic_t defrag_running;
876 /* Used to protect avail_{data, metadata, system}_alloc_bits */
877 seqlock_t profiles_lock;
879 * these three are in extended format (availability of single
880 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
881 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
883 u64 avail_data_alloc_bits;
884 u64 avail_metadata_alloc_bits;
885 u64 avail_system_alloc_bits;
887 /* restriper state */
888 spinlock_t balance_lock;
889 struct mutex balance_mutex;
890 atomic_t balance_pause_req;
891 atomic_t balance_cancel_req;
892 struct btrfs_balance_control *balance_ctl;
893 wait_queue_head_t balance_wait_q;
895 /* Cancellation requests for chunk relocation */
896 atomic_t reloc_cancel_req;
898 u32 data_chunk_allocations;
903 /* private scrub information */
904 struct mutex scrub_lock;
905 atomic_t scrubs_running;
906 atomic_t scrub_pause_req;
907 atomic_t scrubs_paused;
908 atomic_t scrub_cancel_req;
909 wait_queue_head_t scrub_pause_wait;
911 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
914 refcount_t scrub_workers_refcnt;
915 struct btrfs_workqueue *scrub_workers;
916 struct btrfs_workqueue *scrub_wr_completion_workers;
917 struct btrfs_workqueue *scrub_parity_workers;
918 struct btrfs_subpage_info *subpage_info;
920 struct btrfs_discard_ctl discard_ctl;
922 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
923 u32 check_integrity_print_mask;
925 /* is qgroup tracking in a consistent state? */
928 /* holds configuration and tracking. Protected by qgroup_lock */
929 struct rb_root qgroup_tree;
930 spinlock_t qgroup_lock;
933 * used to avoid frequently calling ulist_alloc()/ulist_free()
934 * when doing qgroup accounting, it must be protected by qgroup_lock.
936 struct ulist *qgroup_ulist;
939 * Protect user change for quota operations. If a transaction is needed,
940 * it must be started before locking this lock.
942 struct mutex qgroup_ioctl_lock;
944 /* list of dirty qgroups to be written at next commit */
945 struct list_head dirty_qgroups;
947 /* used by qgroup for an efficient tree traversal */
950 /* qgroup rescan items */
951 struct mutex qgroup_rescan_lock; /* protects the progress item */
952 struct btrfs_key qgroup_rescan_progress;
953 struct btrfs_workqueue *qgroup_rescan_workers;
954 struct completion qgroup_rescan_completion;
955 struct btrfs_work qgroup_rescan_work;
956 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
958 /* filesystem state */
959 unsigned long fs_state;
961 struct btrfs_delayed_root *delayed_root;
963 /* Extent buffer radix tree */
964 spinlock_t buffer_lock;
965 /* Entries are eb->start / sectorsize */
966 struct radix_tree_root buffer_radix;
968 /* next backup root to be overwritten */
969 int backup_root_index;
971 /* device replace state */
972 struct btrfs_dev_replace dev_replace;
974 struct semaphore uuid_tree_rescan_sem;
976 /* Used to reclaim the metadata space in the background. */
977 struct work_struct async_reclaim_work;
978 struct work_struct async_data_reclaim_work;
979 struct work_struct preempt_reclaim_work;
981 /* Reclaim partially filled block groups in the background */
982 struct work_struct reclaim_bgs_work;
983 struct list_head reclaim_bgs;
984 int bg_reclaim_threshold;
986 spinlock_t unused_bgs_lock;
987 struct list_head unused_bgs;
988 struct mutex unused_bg_unpin_mutex;
989 /* Protect block groups that are going to be deleted */
990 struct mutex reclaim_bgs_lock;
992 /* Cached block sizes */
995 /* ilog2 of sectorsize, use to avoid 64bit division */
1001 /* Block groups and devices containing active swapfiles. */
1002 spinlock_t swapfile_pins_lock;
1003 struct rb_root swapfile_pins;
1005 struct crypto_shash *csum_shash;
1007 /* Type of exclusive operation running, protected by super_lock */
1008 enum btrfs_exclusive_operation exclusive_operation;
1011 * Zone size > 0 when in ZONED mode, otherwise it's used for a check
1012 * if the mode is enabled
1019 struct mutex zoned_meta_io_lock;
1020 spinlock_t treelog_bg_lock;
1024 * Start of the dedicated data relocation block group, protected by
1025 * relocation_bg_lock.
1027 spinlock_t relocation_bg_lock;
1030 spinlock_t zone_active_bgs_lock;
1031 struct list_head zone_active_bgs;
1033 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1034 spinlock_t ref_verify_lock;
1035 struct rb_root block_tree;
1038 #ifdef CONFIG_BTRFS_DEBUG
1039 struct kobject *debug_kobj;
1040 struct kobject *discard_debug_kobj;
1041 struct list_head allocated_roots;
1043 spinlock_t eb_leak_lock;
1044 struct list_head allocated_ebs;
1048 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1050 return sb->s_fs_info;
1054 * The state of btrfs root
1058 * btrfs_record_root_in_trans is a multi-step process, and it can race
1059 * with the balancing code. But the race is very small, and only the
1060 * first time the root is added to each transaction. So IN_TRANS_SETUP
1061 * is used to tell us when more checks are required
1063 BTRFS_ROOT_IN_TRANS_SETUP,
1066 * Set if tree blocks of this root can be shared by other roots.
1067 * Only subvolume trees and their reloc trees have this bit set.
1068 * Conflicts with TRACK_DIRTY bit.
1070 * This affects two things:
1072 * - How balance works
1073 * For shareable roots, we need to use reloc tree and do path
1074 * replacement for balance, and need various pre/post hooks for
1075 * snapshot creation to handle them.
1077 * While for non-shareable trees, we just simply do a tree search
1080 * - How dirty roots are tracked
1081 * For shareable roots, btrfs_record_root_in_trans() is needed to
1082 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1083 * don't need to set this manually.
1085 BTRFS_ROOT_SHAREABLE,
1086 BTRFS_ROOT_TRACK_DIRTY,
1087 BTRFS_ROOT_IN_RADIX,
1088 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1089 BTRFS_ROOT_DEFRAG_RUNNING,
1090 BTRFS_ROOT_FORCE_COW,
1091 BTRFS_ROOT_MULTI_LOG_TASKS,
1093 BTRFS_ROOT_DELETING,
1096 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1098 * Set for the subvolume tree owning the reloc tree.
1100 BTRFS_ROOT_DEAD_RELOC_TREE,
1101 /* Mark dead root stored on device whose cleanup needs to be resumed */
1102 BTRFS_ROOT_DEAD_TREE,
1103 /* The root has a log tree. Used for subvolume roots and the tree root. */
1104 BTRFS_ROOT_HAS_LOG_TREE,
1105 /* Qgroup flushing is in progress */
1106 BTRFS_ROOT_QGROUP_FLUSHING,
1107 /* We started the orphan cleanup for this root. */
1108 BTRFS_ROOT_ORPHAN_CLEANUP,
1112 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1113 * code. For detail check comment in fs/btrfs/qgroup.c.
1115 struct btrfs_qgroup_swapped_blocks {
1117 /* RM_EMPTY_ROOT() of above blocks[] */
1119 struct rb_root blocks[BTRFS_MAX_LEVEL];
1123 * in ram representation of the tree. extent_root is used for all allocations
1124 * and for the extent tree extent_root root.
1127 struct rb_node rb_node;
1129 struct extent_buffer *node;
1131 struct extent_buffer *commit_root;
1132 struct btrfs_root *log_root;
1133 struct btrfs_root *reloc_root;
1135 unsigned long state;
1136 struct btrfs_root_item root_item;
1137 struct btrfs_key root_key;
1138 struct btrfs_fs_info *fs_info;
1139 struct extent_io_tree dirty_log_pages;
1141 struct mutex objectid_mutex;
1143 spinlock_t accounting_lock;
1144 struct btrfs_block_rsv *block_rsv;
1146 struct mutex log_mutex;
1147 wait_queue_head_t log_writer_wait;
1148 wait_queue_head_t log_commit_wait[2];
1149 struct list_head log_ctxs[2];
1150 /* Used only for log trees of subvolumes, not for the log root tree */
1151 atomic_t log_writers;
1152 atomic_t log_commit[2];
1153 /* Used only for log trees of subvolumes, not for the log root tree */
1156 /* No matter the commit succeeds or not*/
1157 int log_transid_committed;
1158 /* Just be updated when the commit succeeds. */
1159 int last_log_commit;
1160 pid_t log_start_pid;
1168 struct btrfs_key defrag_progress;
1169 struct btrfs_key defrag_max;
1171 /* The dirty list is only used by non-shareable roots */
1172 struct list_head dirty_list;
1174 struct list_head root_list;
1176 spinlock_t log_extents_lock[2];
1177 struct list_head logged_list[2];
1179 spinlock_t inode_lock;
1180 /* red-black tree that keeps track of in-memory inodes */
1181 struct rb_root inode_tree;
1184 * radix tree that keeps track of delayed nodes of every inode,
1185 * protected by inode_lock
1187 struct radix_tree_root delayed_nodes_tree;
1189 * right now this just gets used so that a root has its own devid
1190 * for stat. It may be used for more later
1194 spinlock_t root_item_lock;
1197 struct mutex delalloc_mutex;
1198 spinlock_t delalloc_lock;
1200 * all of the inodes that have delalloc bytes. It is possible for
1201 * this list to be empty even when there is still dirty data=ordered
1202 * extents waiting to finish IO.
1204 struct list_head delalloc_inodes;
1205 struct list_head delalloc_root;
1206 u64 nr_delalloc_inodes;
1208 struct mutex ordered_extent_mutex;
1210 * this is used by the balancing code to wait for all the pending
1213 spinlock_t ordered_extent_lock;
1216 * all of the data=ordered extents pending writeback
1217 * these can span multiple transactions and basically include
1218 * every dirty data page that isn't from nodatacow
1220 struct list_head ordered_extents;
1221 struct list_head ordered_root;
1222 u64 nr_ordered_extents;
1225 * Not empty if this subvolume root has gone through tree block swap
1228 * Will be used by reloc_control::dirty_subvol_roots.
1230 struct list_head reloc_dirty_list;
1233 * Number of currently running SEND ioctls to prevent
1234 * manipulation with the read-only status via SUBVOL_SETFLAGS
1236 int send_in_progress;
1238 * Number of currently running deduplication operations that have a
1239 * destination inode belonging to this root. Protected by the lock
1242 int dedupe_in_progress;
1243 /* For exclusion of snapshot creation and nocow writes */
1244 struct btrfs_drew_lock snapshot_lock;
1246 atomic_t snapshot_force_cow;
1248 /* For qgroup metadata reserved space */
1249 spinlock_t qgroup_meta_rsv_lock;
1250 u64 qgroup_meta_rsv_pertrans;
1251 u64 qgroup_meta_rsv_prealloc;
1252 wait_queue_head_t qgroup_flush_wait;
1254 /* Number of active swapfiles */
1255 atomic_t nr_swapfiles;
1257 /* Record pairs of swapped blocks for qgroup */
1258 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1260 /* Used only by log trees, when logging csum items */
1261 struct extent_io_tree log_csum_range;
1263 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1267 #ifdef CONFIG_BTRFS_DEBUG
1268 struct list_head leak_list;
1273 * Structure that conveys information about an extent that is going to replace
1274 * all the extents in a file range.
1276 struct btrfs_replace_extent_info {
1282 /* Pointer to a file extent item of type regular or prealloc. */
1285 * Set to true when attempting to replace a file range with a new extent
1286 * described by this structure, set to false when attempting to clone an
1287 * existing extent into a file range.
1290 /* Meaningful only if is_new_extent is true. */
1291 int qgroup_reserved;
1293 * Meaningful only if is_new_extent is true.
1294 * Used to track how many extent items we have already inserted in a
1295 * subvolume tree that refer to the extent described by this structure,
1296 * so that we know when to create a new delayed ref or update an existing
1302 /* Arguments for btrfs_drop_extents() */
1303 struct btrfs_drop_extents_args {
1304 /* Input parameters */
1307 * If NULL, btrfs_drop_extents() will allocate and free its own path.
1308 * If 'replace_extent' is true, this must not be NULL. Also the path
1309 * is always released except if 'replace_extent' is true and
1310 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case
1311 * the path is kept locked.
1313 struct btrfs_path *path;
1314 /* Start offset of the range to drop extents from */
1316 /* End (exclusive, last byte + 1) of the range to drop extents from */
1318 /* If true drop all the extent maps in the range */
1321 * If true it means we want to insert a new extent after dropping all
1322 * the extents in the range. If this is true, the 'extent_item_size'
1323 * parameter must be set as well and the 'extent_inserted' field will
1324 * be set to true by btrfs_drop_extents() if it could insert the new
1326 * Note: when this is set to true the path must not be NULL.
1328 bool replace_extent;
1330 * Used if 'replace_extent' is true. Size of the file extent item to
1331 * insert after dropping all existing extents in the range
1333 u32 extent_item_size;
1335 /* Output parameters */
1338 * Set to the minimum between the input parameter 'end' and the end
1339 * (exclusive, last byte + 1) of the last dropped extent. This is always
1340 * set even if btrfs_drop_extents() returns an error.
1344 * The number of allocated bytes found in the range. This can be smaller
1345 * than the range's length when there are holes in the range.
1349 * Only set if 'replace_extent' is true. Set to true if we were able
1350 * to insert a replacement extent after dropping all extents in the
1351 * range, otherwise set to false by btrfs_drop_extents().
1352 * Also, if btrfs_drop_extents() has set this to true it means it
1353 * returned with the path locked, otherwise if it has set this to
1354 * false it has returned with the path released.
1356 bool extent_inserted;
1359 struct btrfs_file_private {
1364 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1367 return info->nodesize - sizeof(struct btrfs_header);
1370 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1372 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1374 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1377 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1379 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1382 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1383 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1384 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1386 return BTRFS_MAX_ITEM_SIZE(info) -
1387 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1390 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1392 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1396 * Flags for mount options.
1398 * Note: don't forget to add new options to btrfs_show_options()
1401 BTRFS_MOUNT_NODATASUM = (1UL << 0),
1402 BTRFS_MOUNT_NODATACOW = (1UL << 1),
1403 BTRFS_MOUNT_NOBARRIER = (1UL << 2),
1404 BTRFS_MOUNT_SSD = (1UL << 3),
1405 BTRFS_MOUNT_DEGRADED = (1UL << 4),
1406 BTRFS_MOUNT_COMPRESS = (1UL << 5),
1407 BTRFS_MOUNT_NOTREELOG = (1UL << 6),
1408 BTRFS_MOUNT_FLUSHONCOMMIT = (1UL << 7),
1409 BTRFS_MOUNT_SSD_SPREAD = (1UL << 8),
1410 BTRFS_MOUNT_NOSSD = (1UL << 9),
1411 BTRFS_MOUNT_DISCARD_SYNC = (1UL << 10),
1412 BTRFS_MOUNT_FORCE_COMPRESS = (1UL << 11),
1413 BTRFS_MOUNT_SPACE_CACHE = (1UL << 12),
1414 BTRFS_MOUNT_CLEAR_CACHE = (1UL << 13),
1415 BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED = (1UL << 14),
1416 BTRFS_MOUNT_ENOSPC_DEBUG = (1UL << 15),
1417 BTRFS_MOUNT_AUTO_DEFRAG = (1UL << 16),
1418 BTRFS_MOUNT_USEBACKUPROOT = (1UL << 17),
1419 BTRFS_MOUNT_SKIP_BALANCE = (1UL << 18),
1420 BTRFS_MOUNT_CHECK_INTEGRITY = (1UL << 19),
1421 BTRFS_MOUNT_CHECK_INTEGRITY_DATA = (1UL << 20),
1422 BTRFS_MOUNT_PANIC_ON_FATAL_ERROR = (1UL << 21),
1423 BTRFS_MOUNT_RESCAN_UUID_TREE = (1UL << 22),
1424 BTRFS_MOUNT_FRAGMENT_DATA = (1UL << 23),
1425 BTRFS_MOUNT_FRAGMENT_METADATA = (1UL << 24),
1426 BTRFS_MOUNT_FREE_SPACE_TREE = (1UL << 25),
1427 BTRFS_MOUNT_NOLOGREPLAY = (1UL << 26),
1428 BTRFS_MOUNT_REF_VERIFY = (1UL << 27),
1429 BTRFS_MOUNT_DISCARD_ASYNC = (1UL << 28),
1430 BTRFS_MOUNT_IGNOREBADROOTS = (1UL << 29),
1431 BTRFS_MOUNT_IGNOREDATACSUMS = (1UL << 30),
1434 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1435 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1437 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1438 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1439 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1440 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1443 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1445 if (!btrfs_test_opt(fs_info, opt)) \
1446 btrfs_info(fs_info, fmt, ##args); \
1447 btrfs_set_opt(fs_info->mount_opt, opt); \
1450 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1452 if (btrfs_test_opt(fs_info, opt)) \
1453 btrfs_info(fs_info, fmt, ##args); \
1454 btrfs_clear_opt(fs_info->mount_opt, opt); \
1458 * Requests for changes that need to be done during transaction commit.
1460 * Internal mount options that are used for special handling of the real
1461 * mount options (eg. cannot be set during remount and have to be set during
1462 * transaction commit)
1465 #define BTRFS_PENDING_COMMIT (0)
1467 #define btrfs_test_pending(info, opt) \
1468 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1469 #define btrfs_set_pending(info, opt) \
1470 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1471 #define btrfs_clear_pending(info, opt) \
1472 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1475 * Helpers for setting pending mount option changes.
1477 * Expects corresponding macros
1478 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1480 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1482 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1483 btrfs_info((info), fmt, ##args); \
1484 btrfs_set_pending((info), SET_##opt); \
1485 btrfs_clear_pending((info), CLEAR_##opt); \
1489 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1491 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1492 btrfs_info((info), fmt, ##args); \
1493 btrfs_set_pending((info), CLEAR_##opt); \
1494 btrfs_clear_pending((info), SET_##opt); \
1501 #define BTRFS_INODE_NODATASUM (1U << 0)
1502 #define BTRFS_INODE_NODATACOW (1U << 1)
1503 #define BTRFS_INODE_READONLY (1U << 2)
1504 #define BTRFS_INODE_NOCOMPRESS (1U << 3)
1505 #define BTRFS_INODE_PREALLOC (1U << 4)
1506 #define BTRFS_INODE_SYNC (1U << 5)
1507 #define BTRFS_INODE_IMMUTABLE (1U << 6)
1508 #define BTRFS_INODE_APPEND (1U << 7)
1509 #define BTRFS_INODE_NODUMP (1U << 8)
1510 #define BTRFS_INODE_NOATIME (1U << 9)
1511 #define BTRFS_INODE_DIRSYNC (1U << 10)
1512 #define BTRFS_INODE_COMPRESS (1U << 11)
1514 #define BTRFS_INODE_ROOT_ITEM_INIT (1U << 31)
1516 #define BTRFS_INODE_FLAG_MASK \
1517 (BTRFS_INODE_NODATASUM | \
1518 BTRFS_INODE_NODATACOW | \
1519 BTRFS_INODE_READONLY | \
1520 BTRFS_INODE_NOCOMPRESS | \
1521 BTRFS_INODE_PREALLOC | \
1522 BTRFS_INODE_SYNC | \
1523 BTRFS_INODE_IMMUTABLE | \
1524 BTRFS_INODE_APPEND | \
1525 BTRFS_INODE_NODUMP | \
1526 BTRFS_INODE_NOATIME | \
1527 BTRFS_INODE_DIRSYNC | \
1528 BTRFS_INODE_COMPRESS | \
1529 BTRFS_INODE_ROOT_ITEM_INIT)
1531 #define BTRFS_INODE_RO_VERITY (1U << 0)
1533 #define BTRFS_INODE_RO_FLAG_MASK (BTRFS_INODE_RO_VERITY)
1535 struct btrfs_map_token {
1536 struct extent_buffer *eb;
1538 unsigned long offset;
1541 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1542 ((bytes) >> (fs_info)->sectorsize_bits)
1544 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1545 struct extent_buffer *eb)
1548 token->kaddr = page_address(eb->pages[0]);
1552 /* some macros to generate set/get functions for the struct fields. This
1553 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1556 #define le8_to_cpu(v) (v)
1557 #define cpu_to_le8(v) (v)
1560 static inline u8 get_unaligned_le8(const void *p)
1565 static inline void put_unaligned_le8(u8 val, void *p)
1570 #define read_eb_member(eb, ptr, type, member, result) (\
1571 read_extent_buffer(eb, (char *)(result), \
1572 ((unsigned long)(ptr)) + \
1573 offsetof(type, member), \
1574 sizeof(((type *)0)->member)))
1576 #define write_eb_member(eb, ptr, type, member, result) (\
1577 write_extent_buffer(eb, (char *)(result), \
1578 ((unsigned long)(ptr)) + \
1579 offsetof(type, member), \
1580 sizeof(((type *)0)->member)))
1582 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1583 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1584 const void *ptr, unsigned long off); \
1585 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1586 const void *ptr, unsigned long off, \
1588 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1589 const void *ptr, unsigned long off); \
1590 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1591 unsigned long off, u##bits val);
1593 DECLARE_BTRFS_SETGET_BITS(8)
1594 DECLARE_BTRFS_SETGET_BITS(16)
1595 DECLARE_BTRFS_SETGET_BITS(32)
1596 DECLARE_BTRFS_SETGET_BITS(64)
1598 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1599 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1602 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1603 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1605 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1608 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1609 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1611 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1614 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1615 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1617 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1618 type *s, u##bits val) \
1620 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1621 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1624 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1625 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1627 const type *p = page_address(eb->pages[0]) + \
1628 offset_in_page(eb->start); \
1629 return get_unaligned_le##bits(&p->member); \
1631 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1634 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \
1635 put_unaligned_le##bits(val, &p->member); \
1638 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1639 static inline u##bits btrfs_##name(const type *s) \
1641 return get_unaligned_le##bits(&s->member); \
1643 static inline void btrfs_set_##name(type *s, u##bits val) \
1645 put_unaligned_le##bits(val, &s->member); \
1648 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1649 struct btrfs_dev_item *s)
1651 BUILD_BUG_ON(sizeof(u64) !=
1652 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1653 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1656 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1657 struct btrfs_dev_item *s,
1660 BUILD_BUG_ON(sizeof(u64) !=
1661 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1662 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1663 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1667 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1668 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1669 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1670 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1671 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1673 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1674 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1675 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1676 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1677 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1678 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1680 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1681 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1683 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1685 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1687 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1689 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1691 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1692 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1694 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1696 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1698 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1701 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1703 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1706 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1708 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1711 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1712 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1713 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1714 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1715 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1716 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1717 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1718 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1719 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1720 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1721 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1723 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1725 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1728 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1729 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1730 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1732 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1734 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1736 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1738 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1739 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1741 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1743 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1744 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1746 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1749 unsigned long offset = (unsigned long)c;
1750 offset += offsetof(struct btrfs_chunk, stripe);
1751 offset += nr * sizeof(struct btrfs_stripe);
1752 return (struct btrfs_stripe *)offset;
1755 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1757 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1760 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1761 struct btrfs_chunk *c, int nr)
1763 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1766 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1767 struct btrfs_chunk *c, int nr)
1769 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1772 /* struct btrfs_block_group_item */
1773 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1775 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1777 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1778 struct btrfs_block_group_item, chunk_objectid, 64);
1780 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1781 struct btrfs_block_group_item, chunk_objectid, 64);
1782 BTRFS_SETGET_FUNCS(block_group_flags,
1783 struct btrfs_block_group_item, flags, 64);
1784 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1785 struct btrfs_block_group_item, flags, 64);
1787 /* struct btrfs_free_space_info */
1788 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1790 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1792 /* struct btrfs_inode_ref */
1793 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1794 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1796 /* struct btrfs_inode_extref */
1797 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1798 parent_objectid, 64);
1799 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1801 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1803 /* struct btrfs_inode_item */
1804 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1805 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1806 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1807 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1808 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1809 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1810 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1811 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1812 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1813 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1814 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1815 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1816 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1818 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1820 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1822 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1823 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1825 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1827 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1828 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1829 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1830 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1831 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1832 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1833 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1834 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1835 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1836 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1838 /* struct btrfs_dev_extent */
1839 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1841 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1842 chunk_objectid, 64);
1843 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1845 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1846 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1847 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1849 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1851 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1853 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1854 struct btrfs_tree_block_info *item,
1855 struct btrfs_disk_key *key)
1857 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1860 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1861 struct btrfs_tree_block_info *item,
1862 struct btrfs_disk_key *key)
1864 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1867 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1869 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1871 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1873 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1876 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1879 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1881 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1884 static inline u32 btrfs_extent_inline_ref_size(int type)
1886 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1887 type == BTRFS_SHARED_BLOCK_REF_KEY)
1888 return sizeof(struct btrfs_extent_inline_ref);
1889 if (type == BTRFS_SHARED_DATA_REF_KEY)
1890 return sizeof(struct btrfs_shared_data_ref) +
1891 sizeof(struct btrfs_extent_inline_ref);
1892 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1893 return sizeof(struct btrfs_extent_data_ref) +
1894 offsetof(struct btrfs_extent_inline_ref, offset);
1898 /* struct btrfs_node */
1899 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1900 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1901 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1903 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1906 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1909 ptr = offsetof(struct btrfs_node, ptrs) +
1910 sizeof(struct btrfs_key_ptr) * nr;
1911 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1914 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1918 ptr = offsetof(struct btrfs_node, ptrs) +
1919 sizeof(struct btrfs_key_ptr) * nr;
1920 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1923 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1926 ptr = offsetof(struct btrfs_node, ptrs) +
1927 sizeof(struct btrfs_key_ptr) * nr;
1928 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1931 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1935 ptr = offsetof(struct btrfs_node, ptrs) +
1936 sizeof(struct btrfs_key_ptr) * nr;
1937 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1940 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1942 return offsetof(struct btrfs_node, ptrs) +
1943 sizeof(struct btrfs_key_ptr) * nr;
1946 void btrfs_node_key(const struct extent_buffer *eb,
1947 struct btrfs_disk_key *disk_key, int nr);
1949 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1950 struct btrfs_disk_key *disk_key, int nr)
1953 ptr = btrfs_node_key_ptr_offset(nr);
1954 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1955 struct btrfs_key_ptr, key, disk_key);
1958 /* struct btrfs_item */
1959 BTRFS_SETGET_FUNCS(raw_item_offset, struct btrfs_item, offset, 32);
1960 BTRFS_SETGET_FUNCS(raw_item_size, struct btrfs_item, size, 32);
1961 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1962 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1964 static inline unsigned long btrfs_item_nr_offset(int nr)
1966 return offsetof(struct btrfs_leaf, items) +
1967 sizeof(struct btrfs_item) * nr;
1970 static inline struct btrfs_item *btrfs_item_nr(int nr)
1972 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1975 #define BTRFS_ITEM_SETGET_FUNCS(member) \
1976 static inline u32 btrfs_item_##member(const struct extent_buffer *eb, \
1979 return btrfs_raw_item_##member(eb, btrfs_item_nr(slot)); \
1981 static inline void btrfs_set_item_##member(const struct extent_buffer *eb, \
1982 int slot, u32 val) \
1984 btrfs_set_raw_item_##member(eb, btrfs_item_nr(slot), val); \
1986 static inline u32 btrfs_token_item_##member(struct btrfs_map_token *token, \
1989 struct btrfs_item *item = btrfs_item_nr(slot); \
1990 return btrfs_token_raw_item_##member(token, item); \
1992 static inline void btrfs_set_token_item_##member(struct btrfs_map_token *token, \
1993 int slot, u32 val) \
1995 struct btrfs_item *item = btrfs_item_nr(slot); \
1996 btrfs_set_token_raw_item_##member(token, item, val); \
1999 BTRFS_ITEM_SETGET_FUNCS(offset)
2000 BTRFS_ITEM_SETGET_FUNCS(size);
2002 static inline u32 btrfs_item_data_end(const struct extent_buffer *eb, int nr)
2004 return btrfs_item_offset(eb, nr) + btrfs_item_size(eb, nr);
2007 static inline void btrfs_item_key(const struct extent_buffer *eb,
2008 struct btrfs_disk_key *disk_key, int nr)
2010 struct btrfs_item *item = btrfs_item_nr(nr);
2011 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2014 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2015 struct btrfs_disk_key *disk_key, int nr)
2017 struct btrfs_item *item = btrfs_item_nr(nr);
2018 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2021 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2024 * struct btrfs_root_ref
2026 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2027 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2028 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2030 /* struct btrfs_dir_item */
2031 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2032 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2033 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2034 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2035 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2036 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2038 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2040 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2043 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
2044 const struct btrfs_dir_item *item,
2045 struct btrfs_disk_key *key)
2047 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2050 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2051 struct btrfs_dir_item *item,
2052 const struct btrfs_disk_key *key)
2054 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2057 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2059 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2061 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2064 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2065 const struct btrfs_free_space_header *h,
2066 struct btrfs_disk_key *key)
2068 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2071 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2072 struct btrfs_free_space_header *h,
2073 const struct btrfs_disk_key *key)
2075 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2078 /* struct btrfs_disk_key */
2079 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2081 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2082 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2084 #ifdef __LITTLE_ENDIAN
2087 * Optimized helpers for little-endian architectures where CPU and on-disk
2088 * structures have the same endianness and we can skip conversions.
2091 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
2092 const struct btrfs_disk_key *disk_key)
2094 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
2097 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
2098 const struct btrfs_key *cpu_key)
2100 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
2103 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2104 struct btrfs_key *cpu_key, int nr)
2106 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2108 btrfs_node_key(eb, disk_key, nr);
2111 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2112 struct btrfs_key *cpu_key, int nr)
2114 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2116 btrfs_item_key(eb, disk_key, nr);
2119 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2120 const struct btrfs_dir_item *item,
2121 struct btrfs_key *cpu_key)
2123 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2125 btrfs_dir_item_key(eb, item, disk_key);
2130 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2131 const struct btrfs_disk_key *disk)
2133 cpu->offset = le64_to_cpu(disk->offset);
2134 cpu->type = disk->type;
2135 cpu->objectid = le64_to_cpu(disk->objectid);
2138 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2139 const struct btrfs_key *cpu)
2141 disk->offset = cpu_to_le64(cpu->offset);
2142 disk->type = cpu->type;
2143 disk->objectid = cpu_to_le64(cpu->objectid);
2146 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2147 struct btrfs_key *key, int nr)
2149 struct btrfs_disk_key disk_key;
2150 btrfs_node_key(eb, &disk_key, nr);
2151 btrfs_disk_key_to_cpu(key, &disk_key);
2154 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2155 struct btrfs_key *key, int nr)
2157 struct btrfs_disk_key disk_key;
2158 btrfs_item_key(eb, &disk_key, nr);
2159 btrfs_disk_key_to_cpu(key, &disk_key);
2162 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2163 const struct btrfs_dir_item *item,
2164 struct btrfs_key *key)
2166 struct btrfs_disk_key disk_key;
2167 btrfs_dir_item_key(eb, item, &disk_key);
2168 btrfs_disk_key_to_cpu(key, &disk_key);
2173 /* struct btrfs_header */
2174 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2175 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2177 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2178 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2179 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2180 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2181 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2183 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2184 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2186 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2188 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2190 return (btrfs_header_flags(eb) & flag) == flag;
2193 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2195 u64 flags = btrfs_header_flags(eb);
2196 btrfs_set_header_flags(eb, flags | flag);
2199 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2201 u64 flags = btrfs_header_flags(eb);
2202 btrfs_set_header_flags(eb, flags & ~flag);
2205 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2207 u64 flags = btrfs_header_flags(eb);
2208 return flags >> BTRFS_BACKREF_REV_SHIFT;
2211 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2214 u64 flags = btrfs_header_flags(eb);
2215 flags &= ~BTRFS_BACKREF_REV_MASK;
2216 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2217 btrfs_set_header_flags(eb, flags);
2220 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2222 return btrfs_header_level(eb) == 0;
2225 /* struct btrfs_root_item */
2226 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2228 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2229 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2230 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2232 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2234 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2235 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
2236 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2237 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2238 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2239 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2240 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2241 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2242 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2244 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2246 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2248 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2250 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2252 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2255 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2257 /* Byte-swap the constant at compile time, root_item::flags is LE */
2258 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2261 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2263 /* Byte-swap the constant at compile time, root_item::flags is LE */
2264 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2267 static inline u64 btrfs_root_id(const struct btrfs_root *root)
2269 return root->root_key.objectid;
2272 /* struct btrfs_root_backup */
2273 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2275 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2277 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2278 tree_root_level, 8);
2280 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2282 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2283 chunk_root_gen, 64);
2284 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2285 chunk_root_level, 8);
2287 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2289 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2290 extent_root_gen, 64);
2291 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2292 extent_root_level, 8);
2294 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2296 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2298 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2301 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2303 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2305 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2308 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2310 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2312 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2313 csum_root_level, 8);
2314 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2316 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2318 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2321 /* struct btrfs_balance_item */
2322 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2324 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2325 const struct btrfs_balance_item *bi,
2326 struct btrfs_disk_balance_args *ba)
2328 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2331 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2332 struct btrfs_balance_item *bi,
2333 const struct btrfs_disk_balance_args *ba)
2335 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2338 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2339 const struct btrfs_balance_item *bi,
2340 struct btrfs_disk_balance_args *ba)
2342 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2345 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2346 struct btrfs_balance_item *bi,
2347 const struct btrfs_disk_balance_args *ba)
2349 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2352 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2353 const struct btrfs_balance_item *bi,
2354 struct btrfs_disk_balance_args *ba)
2356 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2359 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2360 struct btrfs_balance_item *bi,
2361 const struct btrfs_disk_balance_args *ba)
2363 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2367 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2368 const struct btrfs_disk_balance_args *disk)
2370 memset(cpu, 0, sizeof(*cpu));
2372 cpu->profiles = le64_to_cpu(disk->profiles);
2373 cpu->usage = le64_to_cpu(disk->usage);
2374 cpu->devid = le64_to_cpu(disk->devid);
2375 cpu->pstart = le64_to_cpu(disk->pstart);
2376 cpu->pend = le64_to_cpu(disk->pend);
2377 cpu->vstart = le64_to_cpu(disk->vstart);
2378 cpu->vend = le64_to_cpu(disk->vend);
2379 cpu->target = le64_to_cpu(disk->target);
2380 cpu->flags = le64_to_cpu(disk->flags);
2381 cpu->limit = le64_to_cpu(disk->limit);
2382 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2383 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2387 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2388 const struct btrfs_balance_args *cpu)
2390 memset(disk, 0, sizeof(*disk));
2392 disk->profiles = cpu_to_le64(cpu->profiles);
2393 disk->usage = cpu_to_le64(cpu->usage);
2394 disk->devid = cpu_to_le64(cpu->devid);
2395 disk->pstart = cpu_to_le64(cpu->pstart);
2396 disk->pend = cpu_to_le64(cpu->pend);
2397 disk->vstart = cpu_to_le64(cpu->vstart);
2398 disk->vend = cpu_to_le64(cpu->vend);
2399 disk->target = cpu_to_le64(cpu->target);
2400 disk->flags = cpu_to_le64(cpu->flags);
2401 disk->limit = cpu_to_le64(cpu->limit);
2402 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2403 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2406 /* struct btrfs_super_block */
2407 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2408 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2409 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2411 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2412 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2413 struct btrfs_super_block, sys_chunk_array_size, 32);
2414 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2415 struct btrfs_super_block, chunk_root_generation, 64);
2416 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2418 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2420 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2421 chunk_root_level, 8);
2422 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2424 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2425 log_root_transid, 64);
2426 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2428 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2430 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2432 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2434 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2436 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2438 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2439 root_dir_objectid, 64);
2440 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2442 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2444 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2445 compat_ro_flags, 64);
2446 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2447 incompat_flags, 64);
2448 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2450 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2451 cache_generation, 64);
2452 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2453 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2454 uuid_tree_generation, 64);
2456 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2457 const char *btrfs_super_csum_name(u16 csum_type);
2458 const char *btrfs_super_csum_driver(u16 csum_type);
2459 size_t __attribute_const__ btrfs_get_num_csums(void);
2463 * The leaf data grows from end-to-front in the node.
2464 * this returns the address of the start of the last item,
2465 * which is the stop of the leaf data stack
2467 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2469 u32 nr = btrfs_header_nritems(leaf);
2472 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2473 return btrfs_item_offset(leaf, nr - 1);
2476 /* struct btrfs_file_extent_item */
2477 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2479 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2480 struct btrfs_file_extent_item, disk_bytenr, 64);
2481 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2482 struct btrfs_file_extent_item, offset, 64);
2483 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2484 struct btrfs_file_extent_item, generation, 64);
2485 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2486 struct btrfs_file_extent_item, num_bytes, 64);
2487 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2488 struct btrfs_file_extent_item, ram_bytes, 64);
2489 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2490 struct btrfs_file_extent_item, disk_num_bytes, 64);
2491 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2492 struct btrfs_file_extent_item, compression, 8);
2494 static inline unsigned long
2495 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2497 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2500 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2502 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2505 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2506 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2508 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2510 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2511 disk_num_bytes, 64);
2512 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2514 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2516 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2518 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2520 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2522 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2523 other_encoding, 16);
2526 * this returns the number of bytes used by the item on disk, minus the
2527 * size of any extent headers. If a file is compressed on disk, this is
2528 * the compressed size
2530 static inline u32 btrfs_file_extent_inline_item_len(
2531 const struct extent_buffer *eb,
2534 return btrfs_item_size(eb, nr) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2537 /* btrfs_qgroup_status_item */
2538 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2540 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2542 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2544 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2547 /* btrfs_qgroup_info_item */
2548 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2550 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2551 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2553 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2554 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2557 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2558 struct btrfs_qgroup_info_item, generation, 64);
2559 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2561 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2562 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2563 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2565 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2566 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2568 /* btrfs_qgroup_limit_item */
2569 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2571 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2573 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2575 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2577 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2580 /* btrfs_dev_replace_item */
2581 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2582 struct btrfs_dev_replace_item, src_devid, 64);
2583 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2584 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2586 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2588 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2590 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2592 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2593 num_write_errors, 64);
2594 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2595 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2597 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2599 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2602 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2603 struct btrfs_dev_replace_item, src_devid, 64);
2604 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2605 struct btrfs_dev_replace_item,
2606 cont_reading_from_srcdev_mode, 64);
2607 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2608 struct btrfs_dev_replace_item, replace_state, 64);
2609 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2610 struct btrfs_dev_replace_item, time_started, 64);
2611 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2612 struct btrfs_dev_replace_item, time_stopped, 64);
2613 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2614 struct btrfs_dev_replace_item, num_write_errors, 64);
2615 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2616 struct btrfs_dev_replace_item,
2617 num_uncorrectable_read_errors, 64);
2618 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2619 struct btrfs_dev_replace_item, cursor_left, 64);
2620 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2621 struct btrfs_dev_replace_item, cursor_right, 64);
2623 /* helper function to cast into the data area of the leaf. */
2624 #define btrfs_item_ptr(leaf, slot, type) \
2625 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2626 btrfs_item_offset(leaf, slot)))
2628 #define btrfs_item_ptr_offset(leaf, slot) \
2629 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2630 btrfs_item_offset(leaf, slot)))
2632 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2634 return crc32c(crc, address, length);
2637 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2639 put_unaligned_le32(~crc, result);
2642 static inline u64 btrfs_name_hash(const char *name, int len)
2644 return crc32c((u32)~1, name, len);
2648 * Figure the key offset of an extended inode ref
2650 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2653 return (u64) crc32c(parent_objectid, name, len);
2656 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2658 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2663 enum btrfs_inline_ref_type {
2664 BTRFS_REF_TYPE_INVALID,
2665 BTRFS_REF_TYPE_BLOCK,
2666 BTRFS_REF_TYPE_DATA,
2670 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2671 struct btrfs_extent_inline_ref *iref,
2672 enum btrfs_inline_ref_type is_data);
2673 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2676 * Take the number of bytes to be checksummmed and figure out how many leaves
2677 * it would require to store the csums for that many bytes.
2679 static inline u64 btrfs_csum_bytes_to_leaves(
2680 const struct btrfs_fs_info *fs_info, u64 csum_bytes)
2682 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
2684 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
2688 * Use this if we would be adding new items, as we could split nodes as we cow
2691 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2694 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2698 * Doing a truncate or a modification won't result in new nodes or leaves, just
2699 * what we need for COW.
2701 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2704 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2707 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2708 u64 start, u64 num_bytes);
2709 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2710 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2711 unsigned long count);
2712 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2713 struct btrfs_delayed_ref_root *delayed_refs,
2714 struct btrfs_delayed_ref_head *head);
2715 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2716 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2717 struct btrfs_fs_info *fs_info, u64 bytenr,
2718 u64 offset, int metadata, u64 *refs, u64 *flags);
2719 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2721 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2722 u64 bytenr, u64 num_bytes);
2723 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2724 int btrfs_cross_ref_exist(struct btrfs_root *root,
2725 u64 objectid, u64 offset, u64 bytenr, bool strict);
2726 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2727 struct btrfs_root *root,
2728 u64 parent, u64 root_objectid,
2729 const struct btrfs_disk_key *key,
2730 int level, u64 hint,
2732 enum btrfs_lock_nesting nest);
2733 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2735 struct extent_buffer *buf,
2736 u64 parent, int last_ref);
2737 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2738 struct btrfs_root *root, u64 owner,
2739 u64 offset, u64 ram_bytes,
2740 struct btrfs_key *ins);
2741 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2742 u64 root_objectid, u64 owner, u64 offset,
2743 struct btrfs_key *ins);
2744 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2745 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2746 struct btrfs_key *ins, int is_data, int delalloc);
2747 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2748 struct extent_buffer *buf, int full_backref);
2749 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2750 struct extent_buffer *buf, int full_backref);
2751 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2752 struct extent_buffer *eb, u64 flags,
2753 int level, int is_data);
2754 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2756 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2757 u64 start, u64 len, int delalloc);
2758 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2760 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2761 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2762 struct btrfs_ref *generic_ref);
2764 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2767 * Different levels for to flush space when doing space reservations.
2769 * The higher the level, the more methods we try to reclaim space.
2771 enum btrfs_reserve_flush_enum {
2772 /* If we are in the transaction, we can't flush anything.*/
2773 BTRFS_RESERVE_NO_FLUSH,
2777 * - Running delayed inode items
2778 * - Allocating a new chunk
2780 BTRFS_RESERVE_FLUSH_LIMIT,
2784 * - Running delayed inode items
2785 * - Running delayed refs
2786 * - Running delalloc and waiting for ordered extents
2787 * - Allocating a new chunk
2789 BTRFS_RESERVE_FLUSH_EVICT,
2792 * Flush space by above mentioned methods and by:
2793 * - Running delayed iputs
2794 * - Committing transaction
2796 * Can be interrupted by a fatal signal.
2798 BTRFS_RESERVE_FLUSH_DATA,
2799 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2800 BTRFS_RESERVE_FLUSH_ALL,
2803 * Pretty much the same as FLUSH_ALL, but can also steal space from
2806 * Can be interrupted by a fatal signal.
2808 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2811 enum btrfs_flush_state {
2812 FLUSH_DELAYED_ITEMS_NR = 1,
2813 FLUSH_DELAYED_ITEMS = 2,
2814 FLUSH_DELAYED_REFS_NR = 3,
2815 FLUSH_DELAYED_REFS = 4,
2817 FLUSH_DELALLOC_WAIT = 6,
2818 FLUSH_DELALLOC_FULL = 7,
2820 ALLOC_CHUNK_FORCE = 9,
2821 RUN_DELAYED_IPUTS = 10,
2825 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2826 struct btrfs_block_rsv *rsv,
2827 int nitems, bool use_global_rsv);
2828 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2829 struct btrfs_block_rsv *rsv);
2830 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2832 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2833 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2834 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2835 u64 start, u64 end);
2836 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2837 u64 num_bytes, u64 *actual_bytes);
2838 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2840 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2841 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2842 struct btrfs_fs_info *fs_info);
2843 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2844 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2845 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2848 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2850 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2851 int btrfs_previous_item(struct btrfs_root *root,
2852 struct btrfs_path *path, u64 min_objectid,
2854 int btrfs_previous_extent_item(struct btrfs_root *root,
2855 struct btrfs_path *path, u64 min_objectid);
2856 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2857 struct btrfs_path *path,
2858 const struct btrfs_key *new_key);
2859 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2860 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2861 struct btrfs_key *key, int lowest_level,
2863 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2864 struct btrfs_path *path,
2866 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2869 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2870 struct btrfs_root *root, struct extent_buffer *buf,
2871 struct extent_buffer *parent, int parent_slot,
2872 struct extent_buffer **cow_ret,
2873 enum btrfs_lock_nesting nest);
2874 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2875 struct btrfs_root *root,
2876 struct extent_buffer *buf,
2877 struct extent_buffer **cow_ret, u64 new_root_objectid);
2878 int btrfs_block_can_be_shared(struct btrfs_root *root,
2879 struct extent_buffer *buf);
2880 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2881 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2882 int btrfs_split_item(struct btrfs_trans_handle *trans,
2883 struct btrfs_root *root,
2884 struct btrfs_path *path,
2885 const struct btrfs_key *new_key,
2886 unsigned long split_offset);
2887 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2888 struct btrfs_root *root,
2889 struct btrfs_path *path,
2890 const struct btrfs_key *new_key);
2891 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2892 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2893 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2894 const struct btrfs_key *key, struct btrfs_path *p,
2895 int ins_len, int cow);
2896 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2897 struct btrfs_path *p, u64 time_seq);
2898 int btrfs_search_slot_for_read(struct btrfs_root *root,
2899 const struct btrfs_key *key,
2900 struct btrfs_path *p, int find_higher,
2902 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2903 struct btrfs_root *root, struct extent_buffer *parent,
2904 int start_slot, u64 *last_ret,
2905 struct btrfs_key *progress);
2906 void btrfs_release_path(struct btrfs_path *p);
2907 struct btrfs_path *btrfs_alloc_path(void);
2908 void btrfs_free_path(struct btrfs_path *p);
2910 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2911 struct btrfs_path *path, int slot, int nr);
2912 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2913 struct btrfs_root *root,
2914 struct btrfs_path *path)
2916 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2920 * Describes a batch of items to insert in a btree. This is used by
2921 * btrfs_insert_empty_items().
2923 struct btrfs_item_batch {
2925 * Pointer to an array containing the keys of the items to insert (in
2928 const struct btrfs_key *keys;
2929 /* Pointer to an array containing the data size for each item to insert. */
2930 const u32 *data_sizes;
2932 * The sum of data sizes for all items. The caller can compute this while
2933 * setting up the data_sizes array, so it ends up being more efficient
2934 * than having btrfs_insert_empty_items() or setup_item_for_insert()
2935 * doing it, as it would avoid an extra loop over a potentially large
2936 * array, and in the case of setup_item_for_insert(), we would be doing
2937 * it while holding a write lock on a leaf and often on upper level nodes
2938 * too, unnecessarily increasing the size of a critical section.
2940 u32 total_data_size;
2941 /* Size of the keys and data_sizes arrays (number of items in the batch). */
2945 void btrfs_setup_item_for_insert(struct btrfs_root *root,
2946 struct btrfs_path *path,
2947 const struct btrfs_key *key,
2949 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2950 const struct btrfs_key *key, void *data, u32 data_size);
2951 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2952 struct btrfs_root *root,
2953 struct btrfs_path *path,
2954 const struct btrfs_item_batch *batch);
2956 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2957 struct btrfs_root *root,
2958 struct btrfs_path *path,
2959 const struct btrfs_key *key,
2962 struct btrfs_item_batch batch;
2965 batch.data_sizes = &data_size;
2966 batch.total_data_size = data_size;
2969 return btrfs_insert_empty_items(trans, root, path, &batch);
2972 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2973 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2976 int btrfs_search_backwards(struct btrfs_root *root, struct btrfs_key *key,
2977 struct btrfs_path *path);
2979 static inline int btrfs_next_old_item(struct btrfs_root *root,
2980 struct btrfs_path *p, u64 time_seq)
2983 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2984 return btrfs_next_old_leaf(root, p, time_seq);
2989 * Search the tree again to find a leaf with greater keys.
2991 * Returns 0 if it found something or 1 if there are no greater leaves.
2992 * Returns < 0 on error.
2994 static inline int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
2996 return btrfs_next_old_leaf(root, path, 0);
2999 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
3001 return btrfs_next_old_item(root, p, 0);
3003 int btrfs_leaf_free_space(struct extent_buffer *leaf);
3004 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
3006 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
3007 struct btrfs_root *root,
3008 struct extent_buffer *node,
3009 struct extent_buffer *parent);
3010 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3013 * Do it this way so we only ever do one test_bit in the normal case.
3015 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
3016 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
3024 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3025 * anything except sleeping. This function is used to check the status of
3027 * We check for BTRFS_FS_STATE_RO to avoid races with a concurrent remount,
3028 * since setting and checking for SB_RDONLY in the superblock's flags is not
3031 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
3033 return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) ||
3034 btrfs_fs_closing(fs_info);
3037 static inline void btrfs_set_sb_rdonly(struct super_block *sb)
3039 sb->s_flags |= SB_RDONLY;
3040 set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
3043 static inline void btrfs_clear_sb_rdonly(struct super_block *sb)
3045 sb->s_flags &= ~SB_RDONLY;
3046 clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
3050 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3051 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3053 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3054 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3056 int btrfs_del_root(struct btrfs_trans_handle *trans,
3057 const struct btrfs_key *key);
3058 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3059 const struct btrfs_key *key,
3060 struct btrfs_root_item *item);
3061 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3062 struct btrfs_root *root,
3063 struct btrfs_key *key,
3064 struct btrfs_root_item *item);
3065 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3066 struct btrfs_path *path, struct btrfs_root_item *root_item,
3067 struct btrfs_key *root_key);
3068 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3069 void btrfs_set_root_node(struct btrfs_root_item *item,
3070 struct extent_buffer *node);
3071 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3072 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3073 struct btrfs_root *root);
3076 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3078 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3080 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
3083 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3084 const char *name, int name_len);
3085 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3086 int name_len, struct btrfs_inode *dir,
3087 struct btrfs_key *location, u8 type, u64 index);
3088 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3089 struct btrfs_root *root,
3090 struct btrfs_path *path, u64 dir,
3091 const char *name, int name_len,
3093 struct btrfs_dir_item *
3094 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3095 struct btrfs_root *root,
3096 struct btrfs_path *path, u64 dir,
3097 u64 index, const char *name, int name_len,
3099 struct btrfs_dir_item *
3100 btrfs_search_dir_index_item(struct btrfs_root *root,
3101 struct btrfs_path *path, u64 dirid,
3102 const char *name, int name_len);
3103 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3104 struct btrfs_root *root,
3105 struct btrfs_path *path,
3106 struct btrfs_dir_item *di);
3107 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3108 struct btrfs_root *root,
3109 struct btrfs_path *path, u64 objectid,
3110 const char *name, u16 name_len,
3111 const void *data, u16 data_len);
3112 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3113 struct btrfs_root *root,
3114 struct btrfs_path *path, u64 dir,
3115 const char *name, u16 name_len,
3117 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3118 struct btrfs_path *path,
3123 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3124 struct btrfs_root *root, u64 offset);
3125 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3126 struct btrfs_root *root, u64 offset);
3127 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3130 struct btrfs_dio_private;
3131 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3132 struct btrfs_root *root, u64 bytenr, u64 len);
3133 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst);
3134 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3135 struct btrfs_root *root,
3136 u64 objectid, u64 pos,
3137 u64 disk_offset, u64 disk_num_bytes,
3138 u64 num_bytes, u64 offset, u64 ram_bytes,
3139 u8 compression, u8 encryption, u16 other_encoding);
3140 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3141 struct btrfs_root *root,
3142 struct btrfs_path *path, u64 objectid,
3143 u64 bytenr, int mod);
3144 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3145 struct btrfs_root *root,
3146 struct btrfs_ordered_sum *sums);
3147 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
3148 u64 file_start, int contig);
3149 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3150 struct list_head *list, int search_commit);
3151 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3152 const struct btrfs_path *path,
3153 struct btrfs_file_extent_item *fi,
3154 const bool new_inline,
3155 struct extent_map *em);
3156 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
3158 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
3160 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
3161 u64 btrfs_file_extent_end(const struct btrfs_path *path);
3164 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
3165 int mirror_num, unsigned long bio_flags);
3166 unsigned int btrfs_verify_data_csum(struct btrfs_bio *bbio,
3167 u32 bio_offset, struct page *page,
3168 u64 start, u64 end);
3169 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3170 u64 start, u64 len);
3171 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3172 u64 *orig_start, u64 *orig_block_len,
3173 u64 *ram_bytes, bool strict);
3175 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3176 struct btrfs_inode *inode);
3177 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3178 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3179 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3180 struct btrfs_inode *dir, struct btrfs_inode *inode,
3181 const char *name, int name_len);
3182 int btrfs_add_link(struct btrfs_trans_handle *trans,
3183 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3184 const char *name, int name_len, int add_backref, u64 index);
3185 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3186 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
3189 int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context);
3190 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr,
3191 bool in_reclaim_context);
3192 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
3193 unsigned int extra_bits,
3194 struct extent_state **cached_state);
3195 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3196 struct btrfs_root *new_root,
3197 struct btrfs_root *parent_root,
3198 struct user_namespace *mnt_userns);
3199 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3201 void btrfs_clear_delalloc_extent(struct inode *inode,
3202 struct extent_state *state, unsigned *bits);
3203 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3204 struct extent_state *other);
3205 void btrfs_split_delalloc_extent(struct inode *inode,
3206 struct extent_state *orig, u64 split);
3207 void btrfs_set_range_writeback(struct btrfs_inode *inode, u64 start, u64 end);
3208 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3209 int btrfs_readpage(struct file *file, struct page *page);
3210 void btrfs_evict_inode(struct inode *inode);
3211 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3212 struct inode *btrfs_alloc_inode(struct super_block *sb);
3213 void btrfs_destroy_inode(struct inode *inode);
3214 void btrfs_free_inode(struct inode *inode);
3215 int btrfs_drop_inode(struct inode *inode);
3216 int __init btrfs_init_cachep(void);
3217 void __cold btrfs_destroy_cachep(void);
3218 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3219 struct btrfs_root *root, struct btrfs_path *path);
3220 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3221 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3222 struct page *page, size_t pg_offset,
3223 u64 start, u64 end);
3224 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3225 struct btrfs_root *root, struct btrfs_inode *inode);
3226 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3227 struct btrfs_root *root, struct btrfs_inode *inode);
3228 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3229 struct btrfs_inode *inode);
3230 int btrfs_orphan_cleanup(struct btrfs_root *root);
3231 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size);
3232 void btrfs_add_delayed_iput(struct inode *inode);
3233 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3234 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3235 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3236 u64 start, u64 num_bytes, u64 min_size,
3237 loff_t actual_len, u64 *alloc_hint);
3238 int btrfs_prealloc_file_range_trans(struct inode *inode,
3239 struct btrfs_trans_handle *trans, int mode,
3240 u64 start, u64 num_bytes, u64 min_size,
3241 loff_t actual_len, u64 *alloc_hint);
3242 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3243 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3244 struct writeback_control *wbc);
3245 int btrfs_writepage_cow_fixup(struct page *page);
3246 void btrfs_writepage_endio_finish_ordered(struct btrfs_inode *inode,
3247 struct page *page, u64 start,
3248 u64 end, bool uptodate);
3249 extern const struct dentry_operations btrfs_dentry_operations;
3250 extern const struct iomap_ops btrfs_dio_iomap_ops;
3251 extern const struct iomap_dio_ops btrfs_dio_ops;
3253 /* Inode locking type flags, by default the exclusive lock is taken */
3254 #define BTRFS_ILOCK_SHARED (1U << 0)
3255 #define BTRFS_ILOCK_TRY (1U << 1)
3256 #define BTRFS_ILOCK_MMAP (1U << 2)
3258 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags);
3259 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags);
3260 void btrfs_update_inode_bytes(struct btrfs_inode *inode,
3261 const u64 add_bytes,
3262 const u64 del_bytes);
3265 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3266 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3267 int btrfs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
3268 int btrfs_fileattr_set(struct user_namespace *mnt_userns,
3269 struct dentry *dentry, struct fileattr *fa);
3270 int btrfs_ioctl_get_supported_features(void __user *arg);
3271 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3272 int __pure btrfs_is_empty_uuid(u8 *uuid);
3273 int btrfs_defrag_file(struct inode *inode, struct file_ra_state *ra,
3274 struct btrfs_ioctl_defrag_range_args *range,
3275 u64 newer_than, unsigned long max_to_defrag);
3276 void btrfs_get_block_group_info(struct list_head *groups_list,
3277 struct btrfs_ioctl_space_info *space);
3278 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3279 struct btrfs_ioctl_balance_args *bargs);
3280 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3281 enum btrfs_exclusive_operation type);
3282 bool btrfs_exclop_start_try_lock(struct btrfs_fs_info *fs_info,
3283 enum btrfs_exclusive_operation type);
3284 void btrfs_exclop_start_unlock(struct btrfs_fs_info *fs_info);
3285 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3286 void btrfs_exclop_balance(struct btrfs_fs_info *fs_info,
3287 enum btrfs_exclusive_operation op);
3291 int __init btrfs_auto_defrag_init(void);
3292 void __cold btrfs_auto_defrag_exit(void);
3293 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3294 struct btrfs_inode *inode);
3295 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3296 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3297 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3298 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3300 extern const struct file_operations btrfs_file_operations;
3301 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3302 struct btrfs_root *root, struct btrfs_inode *inode,
3303 struct btrfs_drop_extents_args *args);
3304 int btrfs_replace_file_extents(struct btrfs_inode *inode,
3305 struct btrfs_path *path, const u64 start,
3307 struct btrfs_replace_extent_info *extent_info,
3308 struct btrfs_trans_handle **trans_out);
3309 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3310 struct btrfs_inode *inode, u64 start, u64 end);
3311 int btrfs_release_file(struct inode *inode, struct file *file);
3312 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3313 size_t num_pages, loff_t pos, size_t write_bytes,
3314 struct extent_state **cached, bool noreserve);
3315 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3316 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3317 size_t *write_bytes);
3318 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3321 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3322 struct btrfs_root *root);
3325 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3326 unsigned long new_flags);
3327 int btrfs_sync_fs(struct super_block *sb, int wait);
3328 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3329 u64 subvol_objectid);
3331 static inline __printf(2, 3) __cold
3332 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3336 #ifdef CONFIG_PRINTK
3339 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3341 #define btrfs_printk(fs_info, fmt, args...) \
3342 btrfs_no_printk(fs_info, fmt, ##args)
3345 #define btrfs_emerg(fs_info, fmt, args...) \
3346 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3347 #define btrfs_alert(fs_info, fmt, args...) \
3348 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3349 #define btrfs_crit(fs_info, fmt, args...) \
3350 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3351 #define btrfs_err(fs_info, fmt, args...) \
3352 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3353 #define btrfs_warn(fs_info, fmt, args...) \
3354 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3355 #define btrfs_notice(fs_info, fmt, args...) \
3356 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3357 #define btrfs_info(fs_info, fmt, args...) \
3358 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3361 * Wrappers that use printk_in_rcu
3363 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3364 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3365 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3366 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3367 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3368 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3369 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3370 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3371 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3372 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3373 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3374 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3375 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3376 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3379 * Wrappers that use a ratelimited printk_in_rcu
3381 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3382 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3383 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3384 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3385 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3386 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3387 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3388 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3389 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3390 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3391 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3392 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3393 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3394 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3397 * Wrappers that use a ratelimited printk
3399 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3400 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3401 #define btrfs_alert_rl(fs_info, fmt, args...) \
3402 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3403 #define btrfs_crit_rl(fs_info, fmt, args...) \
3404 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3405 #define btrfs_err_rl(fs_info, fmt, args...) \
3406 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3407 #define btrfs_warn_rl(fs_info, fmt, args...) \
3408 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3409 #define btrfs_notice_rl(fs_info, fmt, args...) \
3410 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3411 #define btrfs_info_rl(fs_info, fmt, args...) \
3412 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3414 #if defined(CONFIG_DYNAMIC_DEBUG)
3415 #define btrfs_debug(fs_info, fmt, args...) \
3416 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3417 fs_info, KERN_DEBUG fmt, ##args)
3418 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3419 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3420 fs_info, KERN_DEBUG fmt, ##args)
3421 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3422 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3423 fs_info, KERN_DEBUG fmt, ##args)
3424 #define btrfs_debug_rl(fs_info, fmt, args...) \
3425 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3426 fs_info, KERN_DEBUG fmt, ##args)
3427 #elif defined(DEBUG)
3428 #define btrfs_debug(fs_info, fmt, args...) \
3429 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3430 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3431 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3432 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3433 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3434 #define btrfs_debug_rl(fs_info, fmt, args...) \
3435 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3437 #define btrfs_debug(fs_info, fmt, args...) \
3438 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3439 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3440 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3441 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3442 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3443 #define btrfs_debug_rl(fs_info, fmt, args...) \
3444 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3447 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3450 btrfs_printk(fs_info, fmt, ##args); \
3451 rcu_read_unlock(); \
3454 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3457 btrfs_no_printk(fs_info, fmt, ##args); \
3458 rcu_read_unlock(); \
3461 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3463 static DEFINE_RATELIMIT_STATE(_rs, \
3464 DEFAULT_RATELIMIT_INTERVAL, \
3465 DEFAULT_RATELIMIT_BURST); \
3466 if (__ratelimit(&_rs)) \
3467 btrfs_printk(fs_info, fmt, ##args); \
3470 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3473 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3474 rcu_read_unlock(); \
3477 #ifdef CONFIG_BTRFS_ASSERT
3479 static inline void assertfail(const char *expr, const char *file, int line)
3481 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3485 #define ASSERT(expr) \
3486 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3489 static inline void assertfail(const char *expr, const char* file, int line) { }
3490 #define ASSERT(expr) (void)(expr)
3493 #if BITS_PER_LONG == 32
3494 #define BTRFS_32BIT_MAX_FILE_SIZE (((u64)ULONG_MAX + 1) << PAGE_SHIFT)
3496 * The warning threshold is 5/8th of the MAX_LFS_FILESIZE that limits the logical
3497 * addresses of extents.
3499 * For 4K page size it's about 10T, for 64K it's 160T.
3501 #define BTRFS_32BIT_EARLY_WARN_THRESHOLD (BTRFS_32BIT_MAX_FILE_SIZE * 5 / 8)
3502 void btrfs_warn_32bit_limit(struct btrfs_fs_info *fs_info);
3503 void btrfs_err_32bit_limit(struct btrfs_fs_info *fs_info);
3507 * Get the correct offset inside the page of extent buffer.
3509 * @eb: target extent buffer
3510 * @start: offset inside the extent buffer
3512 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases.
3514 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb,
3515 unsigned long offset)
3518 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned
3519 * to PAGE_SIZE, thus adding it won't cause any difference.
3521 * For sectorsize < PAGE_SIZE, we must only read the data that belongs
3522 * to the eb, thus we have to take the eb->start into consideration.
3524 return offset_in_page(offset + eb->start);
3527 static inline unsigned long get_eb_page_index(unsigned long offset)
3530 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough.
3532 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE,
3533 * and have ensured that all tree blocks are contained in one page,
3534 * thus we always get index == 0.
3536 return offset >> PAGE_SHIFT;
3540 * Use that for functions that are conditionally exported for sanity tests but
3543 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3544 #define EXPORT_FOR_TESTS static
3546 #define EXPORT_FOR_TESTS
3550 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3553 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3558 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3559 unsigned int line, int errno, const char *fmt, ...);
3561 const char * __attribute_const__ btrfs_decode_error(int errno);
3564 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3565 const char *function,
3566 unsigned int line, int errno);
3569 * Call btrfs_abort_transaction as early as possible when an error condition is
3570 * detected, that way the exact line number is reported.
3572 #define btrfs_abort_transaction(trans, errno) \
3574 /* Report first abort since mount */ \
3575 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3576 &((trans)->fs_info->fs_state))) { \
3577 if ((errno) != -EIO && (errno) != -EROFS) { \
3578 WARN(1, KERN_DEBUG \
3579 "BTRFS: Transaction aborted (error %d)\n", \
3582 btrfs_debug((trans)->fs_info, \
3583 "Transaction aborted (error %d)", \
3587 __btrfs_abort_transaction((trans), __func__, \
3588 __LINE__, (errno)); \
3591 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3593 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3594 (errno), fmt, ##args); \
3597 #define BTRFS_FS_ERROR(fs_info) (unlikely(test_bit(BTRFS_FS_STATE_ERROR, \
3598 &(fs_info)->fs_state)))
3599 #define BTRFS_FS_LOG_CLEANUP_ERROR(fs_info) \
3600 (unlikely(test_bit(BTRFS_FS_STATE_LOG_CLEANUP_ERROR, \
3601 &(fs_info)->fs_state)))
3605 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3606 unsigned int line, int errno, const char *fmt, ...);
3608 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3609 * will panic(). Otherwise we BUG() here.
3611 #define btrfs_panic(fs_info, errno, fmt, args...) \
3613 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3618 /* compatibility and incompatibility defines */
3620 #define btrfs_set_fs_incompat(__fs_info, opt) \
3621 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3624 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3625 u64 flag, const char* name)
3627 struct btrfs_super_block *disk_super;
3630 disk_super = fs_info->super_copy;
3631 features = btrfs_super_incompat_flags(disk_super);
3632 if (!(features & flag)) {
3633 spin_lock(&fs_info->super_lock);
3634 features = btrfs_super_incompat_flags(disk_super);
3635 if (!(features & flag)) {
3637 btrfs_set_super_incompat_flags(disk_super, features);
3639 "setting incompat feature flag for %s (0x%llx)",
3642 spin_unlock(&fs_info->super_lock);
3646 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3647 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3650 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3651 u64 flag, const char* name)
3653 struct btrfs_super_block *disk_super;
3656 disk_super = fs_info->super_copy;
3657 features = btrfs_super_incompat_flags(disk_super);
3658 if (features & flag) {
3659 spin_lock(&fs_info->super_lock);
3660 features = btrfs_super_incompat_flags(disk_super);
3661 if (features & flag) {
3663 btrfs_set_super_incompat_flags(disk_super, features);
3665 "clearing incompat feature flag for %s (0x%llx)",
3668 spin_unlock(&fs_info->super_lock);
3672 #define btrfs_fs_incompat(fs_info, opt) \
3673 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3675 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3677 struct btrfs_super_block *disk_super;
3678 disk_super = fs_info->super_copy;
3679 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3682 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3683 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3686 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3687 u64 flag, const char *name)
3689 struct btrfs_super_block *disk_super;
3692 disk_super = fs_info->super_copy;
3693 features = btrfs_super_compat_ro_flags(disk_super);
3694 if (!(features & flag)) {
3695 spin_lock(&fs_info->super_lock);
3696 features = btrfs_super_compat_ro_flags(disk_super);
3697 if (!(features & flag)) {
3699 btrfs_set_super_compat_ro_flags(disk_super, features);
3701 "setting compat-ro feature flag for %s (0x%llx)",
3704 spin_unlock(&fs_info->super_lock);
3708 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3709 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3712 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3713 u64 flag, const char *name)
3715 struct btrfs_super_block *disk_super;
3718 disk_super = fs_info->super_copy;
3719 features = btrfs_super_compat_ro_flags(disk_super);
3720 if (features & flag) {
3721 spin_lock(&fs_info->super_lock);
3722 features = btrfs_super_compat_ro_flags(disk_super);
3723 if (features & flag) {
3725 btrfs_set_super_compat_ro_flags(disk_super, features);
3727 "clearing compat-ro feature flag for %s (0x%llx)",
3730 spin_unlock(&fs_info->super_lock);
3734 #define btrfs_fs_compat_ro(fs_info, opt) \
3735 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3737 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3739 struct btrfs_super_block *disk_super;
3740 disk_super = fs_info->super_copy;
3741 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3745 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3746 struct posix_acl *btrfs_get_acl(struct inode *inode, int type, bool rcu);
3747 int btrfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
3748 struct posix_acl *acl, int type);
3749 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3750 struct inode *inode, struct inode *dir);
3752 #define btrfs_get_acl NULL
3753 #define btrfs_set_acl NULL
3754 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3755 struct inode *inode, struct inode *dir)
3762 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3763 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3764 struct btrfs_root *root);
3765 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3766 struct btrfs_root *root);
3767 int btrfs_recover_relocation(struct btrfs_root *root);
3768 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3769 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3770 struct btrfs_root *root, struct extent_buffer *buf,
3771 struct extent_buffer *cow);
3772 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3773 u64 *bytes_to_reserve);
3774 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3775 struct btrfs_pending_snapshot *pending);
3776 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3777 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3779 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3782 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3783 u64 end, struct btrfs_scrub_progress *progress,
3784 int readonly, int is_dev_replace);
3785 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3786 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3787 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3788 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3789 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3790 struct btrfs_scrub_progress *progress);
3791 static inline void btrfs_init_full_stripe_locks_tree(
3792 struct btrfs_full_stripe_locks_tree *locks_root)
3794 locks_root->root = RB_ROOT;
3795 mutex_init(&locks_root->lock);
3799 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3800 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3801 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3803 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3805 btrfs_bio_counter_sub(fs_info, 1);
3808 static inline int is_fstree(u64 rootid)
3810 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3811 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3812 !btrfs_qgroup_level(rootid)))
3817 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3819 return signal_pending(current);
3823 #ifdef CONFIG_FS_VERITY
3825 extern const struct fsverity_operations btrfs_verityops;
3826 int btrfs_drop_verity_items(struct btrfs_inode *inode);
3828 BTRFS_SETGET_FUNCS(verity_descriptor_encryption, struct btrfs_verity_descriptor_item,
3830 BTRFS_SETGET_FUNCS(verity_descriptor_size, struct btrfs_verity_descriptor_item,
3832 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_encryption,
3833 struct btrfs_verity_descriptor_item, encryption, 8);
3834 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_size,
3835 struct btrfs_verity_descriptor_item, size, 64);
3839 static inline int btrfs_drop_verity_items(struct btrfs_inode *inode)
3846 /* Sanity test specific functions */
3847 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3848 void btrfs_test_destroy_inode(struct inode *inode);
3849 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3851 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3854 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3860 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
3862 return fs_info->zoned != 0;
3865 static inline bool btrfs_is_data_reloc_root(const struct btrfs_root *root)
3867 return root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID;
3871 * We use page status Private2 to indicate there is an ordered extent with
3874 * Rename the Private2 accessors to Ordered, to improve readability.
3876 #define PageOrdered(page) PagePrivate2(page)
3877 #define SetPageOrdered(page) SetPagePrivate2(page)
3878 #define ClearPageOrdered(page) ClearPagePrivate2(page)