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,
148 #define BTRFS_BACKREF_REV_MAX 256
149 #define BTRFS_BACKREF_REV_SHIFT 56
150 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
151 BTRFS_BACKREF_REV_SHIFT)
153 #define BTRFS_OLD_BACKREF_REV 0
154 #define BTRFS_MIXED_BACKREF_REV 1
157 * every tree block (leaf or node) starts with this header.
159 struct btrfs_header {
160 /* these first four must match the super block */
161 u8 csum[BTRFS_CSUM_SIZE];
162 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
163 __le64 bytenr; /* which block this node is supposed to live in */
166 /* allowed to be different from the super from here on down */
167 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
172 } __attribute__ ((__packed__));
175 * this is a very generous portion of the super block, giving us
176 * room to translate 14 chunks with 3 stripes each.
178 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
181 * just in case we somehow lose the roots and are not able to mount,
182 * we store an array of the roots from previous transactions
185 #define BTRFS_NUM_BACKUP_ROOTS 4
186 struct btrfs_root_backup {
188 __le64 tree_root_gen;
191 __le64 chunk_root_gen;
194 __le64 extent_root_gen;
203 __le64 csum_root_gen;
213 u8 extent_root_level;
217 /* future and to align */
219 } __attribute__ ((__packed__));
221 #define BTRFS_SUPER_INFO_OFFSET SZ_64K
222 #define BTRFS_SUPER_INFO_SIZE 4096
225 * the super block basically lists the main trees of the FS
226 * it currently lacks any block count etc etc
228 struct btrfs_super_block {
229 /* the first 4 fields must match struct btrfs_header */
230 u8 csum[BTRFS_CSUM_SIZE];
231 /* FS specific UUID, visible to user */
232 u8 fsid[BTRFS_FSID_SIZE];
233 __le64 bytenr; /* this block number */
236 /* allowed to be different from the btrfs_header from here own down */
243 /* this will help find the new super based on the log root */
244 __le64 log_root_transid;
247 __le64 root_dir_objectid;
251 __le32 __unused_leafsize;
253 __le32 sys_chunk_array_size;
254 __le64 chunk_root_generation;
256 __le64 compat_ro_flags;
257 __le64 incompat_flags;
262 struct btrfs_dev_item dev_item;
264 char label[BTRFS_LABEL_SIZE];
266 __le64 cache_generation;
267 __le64 uuid_tree_generation;
269 /* the UUID written into btree blocks */
270 u8 metadata_uuid[BTRFS_FSID_SIZE];
272 /* future expansion */
274 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
275 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
277 /* Padded to 4096 bytes */
279 } __attribute__ ((__packed__));
280 static_assert(sizeof(struct btrfs_super_block) == BTRFS_SUPER_INFO_SIZE);
283 * Compat flags that we support. If any incompat flags are set other than the
284 * ones specified below then we will fail to mount
286 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
287 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
288 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
290 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
291 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
292 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID | \
293 BTRFS_FEATURE_COMPAT_RO_VERITY)
295 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
296 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
298 #define BTRFS_FEATURE_INCOMPAT_SUPP \
299 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
300 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
301 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
302 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
303 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
304 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
305 BTRFS_FEATURE_INCOMPAT_RAID56 | \
306 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
307 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
308 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
309 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
310 BTRFS_FEATURE_INCOMPAT_RAID1C34 | \
311 BTRFS_FEATURE_INCOMPAT_ZONED)
313 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
314 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
315 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
318 * A leaf is full of items. offset and size tell us where to find
319 * the item in the leaf (relative to the start of the data area)
322 struct btrfs_disk_key key;
325 } __attribute__ ((__packed__));
328 * leaves have an item area and a data area:
329 * [item0, item1....itemN] [free space] [dataN...data1, data0]
331 * The data is separate from the items to get the keys closer together
335 struct btrfs_header header;
336 struct btrfs_item items[];
337 } __attribute__ ((__packed__));
340 * all non-leaf blocks are nodes, they hold only keys and pointers to
343 struct btrfs_key_ptr {
344 struct btrfs_disk_key key;
347 } __attribute__ ((__packed__));
350 struct btrfs_header header;
351 struct btrfs_key_ptr ptrs[];
352 } __attribute__ ((__packed__));
354 /* Read ahead values for struct btrfs_path.reada */
360 * Similar to READA_FORWARD but unlike it:
362 * 1) It will trigger readahead even for leaves that are not close to
363 * each other on disk;
364 * 2) It also triggers readahead for nodes;
365 * 3) During a search, even when a node or leaf is already in memory, it
366 * will still trigger readahead for other nodes and leaves that follow
369 * This is meant to be used only when we know we are iterating over the
370 * entire tree or a very large part of it.
372 READA_FORWARD_ALWAYS,
376 * btrfs_paths remember the path taken from the root down to the leaf.
377 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
378 * to any other levels that are present.
380 * The slots array records the index of the item or block pointer
381 * used while walking the tree.
384 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
385 int slots[BTRFS_MAX_LEVEL];
386 /* if there is real range locking, this locks field will change */
387 u8 locks[BTRFS_MAX_LEVEL];
389 /* keep some upper locks as we walk down */
393 * set by btrfs_split_item, tells search_slot to keep all locks
394 * and to force calls to keep space in the nodes
396 unsigned int search_for_split:1;
397 unsigned int keep_locks:1;
398 unsigned int skip_locking:1;
399 unsigned int search_commit_root:1;
400 unsigned int need_commit_sem:1;
401 unsigned int skip_release_on_error:1;
403 * Indicate that new item (btrfs_search_slot) is extending already
404 * existing item and ins_len contains only the data size and not item
405 * header (ie. sizeof(struct btrfs_item) is not included).
407 unsigned int search_for_extension:1;
409 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
410 sizeof(struct btrfs_item))
411 struct btrfs_dev_replace {
412 u64 replace_state; /* see #define above */
413 time64_t time_started; /* seconds since 1-Jan-1970 */
414 time64_t time_stopped; /* seconds since 1-Jan-1970 */
415 atomic64_t num_write_errors;
416 atomic64_t num_uncorrectable_read_errors;
419 u64 committed_cursor_left;
420 u64 cursor_left_last_write_of_item;
423 u64 cont_reading_from_srcdev_mode; /* see #define above */
426 int item_needs_writeback;
427 struct btrfs_device *srcdev;
428 struct btrfs_device *tgtdev;
430 struct mutex lock_finishing_cancel_unmount;
431 struct rw_semaphore rwsem;
433 struct btrfs_scrub_progress scrub_progress;
435 struct percpu_counter bio_counter;
436 wait_queue_head_t replace_wait;
440 * free clusters are used to claim free space in relatively large chunks,
441 * allowing us to do less seeky writes. They are used for all metadata
442 * allocations. In ssd_spread mode they are also used for data allocations.
444 struct btrfs_free_cluster {
446 spinlock_t refill_lock;
449 /* largest extent in this cluster */
452 /* first extent starting offset */
455 /* We did a full search and couldn't create a cluster */
458 struct btrfs_block_group *block_group;
460 * when a cluster is allocated from a block group, we put the
461 * cluster onto a list in the block group so that it can
462 * be freed before the block group is freed.
464 struct list_head block_group_list;
467 enum btrfs_caching_type {
471 BTRFS_CACHE_FINISHED,
476 * Tree to record all locked full stripes of a RAID5/6 block group
478 struct btrfs_full_stripe_locks_tree {
483 /* Discard control. */
485 * Async discard uses multiple lists to differentiate the discard filter
486 * parameters. Index 0 is for completely free block groups where we need to
487 * ensure the entire block group is trimmed without being lossy. Indices
488 * afterwards represent monotonically decreasing discard filter sizes to
489 * prioritize what should be discarded next.
491 #define BTRFS_NR_DISCARD_LISTS 3
492 #define BTRFS_DISCARD_INDEX_UNUSED 0
493 #define BTRFS_DISCARD_INDEX_START 1
495 struct btrfs_discard_ctl {
496 struct workqueue_struct *discard_workers;
497 struct delayed_work work;
499 struct btrfs_block_group *block_group;
500 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
502 u64 prev_discard_time;
503 atomic_t discardable_extents;
504 atomic64_t discardable_bytes;
505 u64 max_discard_size;
509 u64 discard_extent_bytes;
510 u64 discard_bitmap_bytes;
511 atomic64_t discard_bytes_saved;
514 enum btrfs_orphan_cleanup_state {
515 ORPHAN_CLEANUP_STARTED = 1,
516 ORPHAN_CLEANUP_DONE = 2,
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);
557 BTRFS_FS_CLOSING_START,
558 BTRFS_FS_CLOSING_DONE,
559 BTRFS_FS_LOG_RECOVERING,
561 BTRFS_FS_QUOTA_ENABLED,
562 BTRFS_FS_UPDATE_UUID_TREE_GEN,
563 BTRFS_FS_CREATING_FREE_SPACE_TREE,
567 BTRFS_FS_QUOTA_OVERRIDE,
568 /* Used to record internally whether fs has been frozen */
571 * Indicate that balance has been set up from the ioctl and is in the
572 * main phase. The fs_info::balance_ctl is initialized.
574 BTRFS_FS_BALANCE_RUNNING,
577 * Indicate that relocation of a chunk has started, it's set per chunk
578 * and is toggled between chunks.
579 * Set, tested and cleared while holding fs_info::send_reloc_lock.
581 BTRFS_FS_RELOC_RUNNING,
583 /* Indicate that the cleaner thread is awake and doing something. */
584 BTRFS_FS_CLEANER_RUNNING,
587 * The checksumming has an optimized version and is considered fast,
588 * so we don't need to offload checksums to workqueues.
590 BTRFS_FS_CSUM_IMPL_FAST,
592 /* Indicate that the discard workqueue can service discards. */
593 BTRFS_FS_DISCARD_RUNNING,
595 /* Indicate that we need to cleanup space cache v1 */
596 BTRFS_FS_CLEANUP_SPACE_CACHE_V1,
598 /* Indicate that we can't trust the free space tree for caching yet */
599 BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED,
601 /* Indicate whether there are any tree modification log users */
602 BTRFS_FS_TREE_MOD_LOG_USERS,
604 #if BITS_PER_LONG == 32
605 /* Indicate if we have error/warn message printed on 32bit systems */
606 BTRFS_FS_32BIT_ERROR,
612 * Exclusive operations (device replace, resize, device add/remove, balance)
614 enum btrfs_exclusive_operation {
616 BTRFS_EXCLOP_BALANCE,
617 BTRFS_EXCLOP_DEV_ADD,
618 BTRFS_EXCLOP_DEV_REMOVE,
619 BTRFS_EXCLOP_DEV_REPLACE,
621 BTRFS_EXCLOP_SWAP_ACTIVATE,
624 struct btrfs_fs_info {
625 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
627 struct btrfs_root *extent_root;
628 struct btrfs_root *tree_root;
629 struct btrfs_root *chunk_root;
630 struct btrfs_root *dev_root;
631 struct btrfs_root *fs_root;
632 struct btrfs_root *csum_root;
633 struct btrfs_root *quota_root;
634 struct btrfs_root *uuid_root;
635 struct btrfs_root *free_space_root;
636 struct btrfs_root *data_reloc_root;
638 /* the log root tree is a directory of all the other log roots */
639 struct btrfs_root *log_root_tree;
641 spinlock_t fs_roots_radix_lock;
642 struct radix_tree_root fs_roots_radix;
644 /* block group cache stuff */
645 spinlock_t block_group_cache_lock;
646 u64 first_logical_byte;
647 struct rb_root block_group_cache_tree;
649 /* keep track of unallocated space */
650 atomic64_t free_chunk_space;
652 /* Track ranges which are used by log trees blocks/logged data extents */
653 struct extent_io_tree excluded_extents;
655 /* logical->physical extent mapping */
656 struct extent_map_tree mapping_tree;
659 * block reservation for extent, checksum, root tree and
660 * delayed dir index item
662 struct btrfs_block_rsv global_block_rsv;
663 /* block reservation for metadata operations */
664 struct btrfs_block_rsv trans_block_rsv;
665 /* block reservation for chunk tree */
666 struct btrfs_block_rsv chunk_block_rsv;
667 /* block reservation for delayed operations */
668 struct btrfs_block_rsv delayed_block_rsv;
669 /* block reservation for delayed refs */
670 struct btrfs_block_rsv delayed_refs_rsv;
672 struct btrfs_block_rsv empty_block_rsv;
675 u64 last_trans_committed;
676 u64 avg_delayed_ref_runtime;
679 * this is updated to the current trans every time a full commit
680 * is required instead of the faster short fsync log commits
682 u64 last_trans_log_full_commit;
683 unsigned long mount_opt;
685 * Track requests for actions that need to be done during transaction
686 * commit (like for some mount options).
688 unsigned long pending_changes;
689 unsigned long compress_type:4;
690 unsigned int compress_level;
693 * It is a suggestive number, the read side is safe even it gets a
694 * wrong number because we will write out the data into a regular
695 * extent. The write side(mount/remount) is under ->s_umount lock,
696 * so it is also safe.
700 struct btrfs_transaction *running_transaction;
701 wait_queue_head_t transaction_throttle;
702 wait_queue_head_t transaction_wait;
703 wait_queue_head_t transaction_blocked_wait;
704 wait_queue_head_t async_submit_wait;
707 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
708 * when they are updated.
710 * Because we do not clear the flags for ever, so we needn't use
711 * the lock on the read side.
713 * We also needn't use the lock when we mount the fs, because
714 * there is no other task which will update the flag.
716 spinlock_t super_lock;
717 struct btrfs_super_block *super_copy;
718 struct btrfs_super_block *super_for_commit;
719 struct super_block *sb;
720 struct inode *btree_inode;
721 struct mutex tree_log_mutex;
722 struct mutex transaction_kthread_mutex;
723 struct mutex cleaner_mutex;
724 struct mutex chunk_mutex;
727 * this is taken to make sure we don't set block groups ro after
728 * the free space cache has been allocated on them
730 struct mutex ro_block_group_mutex;
732 /* this is used during read/modify/write to make sure
733 * no two ios are trying to mod the same stripe at the same
736 struct btrfs_stripe_hash_table *stripe_hash_table;
739 * this protects the ordered operations list only while we are
740 * processing all of the entries on it. This way we make
741 * sure the commit code doesn't find the list temporarily empty
742 * because another function happens to be doing non-waiting preflush
743 * before jumping into the main commit.
745 struct mutex ordered_operations_mutex;
747 struct rw_semaphore commit_root_sem;
749 struct rw_semaphore cleanup_work_sem;
751 struct rw_semaphore subvol_sem;
753 spinlock_t trans_lock;
755 * the reloc mutex goes with the trans lock, it is taken
756 * during commit to protect us from the relocation code
758 struct mutex reloc_mutex;
760 struct list_head trans_list;
761 struct list_head dead_roots;
762 struct list_head caching_block_groups;
764 spinlock_t delayed_iput_lock;
765 struct list_head delayed_iputs;
766 atomic_t nr_delayed_iputs;
767 wait_queue_head_t delayed_iputs_wait;
769 atomic64_t tree_mod_seq;
771 /* this protects tree_mod_log and tree_mod_seq_list */
772 rwlock_t tree_mod_log_lock;
773 struct rb_root tree_mod_log;
774 struct list_head tree_mod_seq_list;
776 atomic_t async_delalloc_pages;
779 * this is used to protect the following list -- ordered_roots.
781 spinlock_t ordered_root_lock;
784 * all fs/file tree roots in which there are data=ordered extents
785 * pending writeback are added into this list.
787 * these can span multiple transactions and basically include
788 * every dirty data page that isn't from nodatacow
790 struct list_head ordered_roots;
792 struct mutex delalloc_root_mutex;
793 spinlock_t delalloc_root_lock;
794 /* all fs/file tree roots that have delalloc inodes. */
795 struct list_head delalloc_roots;
798 * there is a pool of worker threads for checksumming during writes
799 * and a pool for checksumming after reads. This is because readers
800 * can run with FS locks held, and the writers may be waiting for
801 * those locks. We don't want ordering in the pending list to cause
802 * deadlocks, and so the two are serviced separately.
804 * A third pool does submit_bio to avoid deadlocking with the other
807 struct btrfs_workqueue *workers;
808 struct btrfs_workqueue *delalloc_workers;
809 struct btrfs_workqueue *flush_workers;
810 struct btrfs_workqueue *endio_workers;
811 struct btrfs_workqueue *endio_meta_workers;
812 struct btrfs_workqueue *endio_raid56_workers;
813 struct btrfs_workqueue *rmw_workers;
814 struct btrfs_workqueue *endio_meta_write_workers;
815 struct btrfs_workqueue *endio_write_workers;
816 struct btrfs_workqueue *endio_freespace_worker;
817 struct btrfs_workqueue *caching_workers;
818 struct btrfs_workqueue *readahead_workers;
821 * fixup workers take dirty pages that didn't properly go through
822 * the cow mechanism and make them safe to write. It happens
823 * for the sys_munmap function call path
825 struct btrfs_workqueue *fixup_workers;
826 struct btrfs_workqueue *delayed_workers;
828 struct task_struct *transaction_kthread;
829 struct task_struct *cleaner_kthread;
830 u32 thread_pool_size;
832 struct kobject *space_info_kobj;
833 struct kobject *qgroups_kobj;
835 /* used to keep from writing metadata until there is a nice batch */
836 struct percpu_counter dirty_metadata_bytes;
837 struct percpu_counter delalloc_bytes;
838 struct percpu_counter ordered_bytes;
839 s32 dirty_metadata_batch;
842 struct list_head dirty_cowonly_roots;
844 struct btrfs_fs_devices *fs_devices;
847 * The space_info list is effectively read only after initial
848 * setup. It is populated at mount time and cleaned up after
849 * all block groups are removed. RCU is used to protect it.
851 struct list_head space_info;
853 struct btrfs_space_info *data_sinfo;
855 struct reloc_control *reloc_ctl;
857 /* data_alloc_cluster is only used in ssd_spread mode */
858 struct btrfs_free_cluster data_alloc_cluster;
860 /* all metadata allocations go through this cluster */
861 struct btrfs_free_cluster meta_alloc_cluster;
863 /* auto defrag inodes go here */
864 spinlock_t defrag_inodes_lock;
865 struct rb_root defrag_inodes;
866 atomic_t defrag_running;
868 /* Used to protect avail_{data, metadata, system}_alloc_bits */
869 seqlock_t profiles_lock;
871 * these three are in extended format (availability of single
872 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
873 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
875 u64 avail_data_alloc_bits;
876 u64 avail_metadata_alloc_bits;
877 u64 avail_system_alloc_bits;
879 /* restriper state */
880 spinlock_t balance_lock;
881 struct mutex balance_mutex;
882 atomic_t balance_pause_req;
883 atomic_t balance_cancel_req;
884 struct btrfs_balance_control *balance_ctl;
885 wait_queue_head_t balance_wait_q;
887 /* Cancellation requests for chunk relocation */
888 atomic_t reloc_cancel_req;
890 u32 data_chunk_allocations;
895 /* private scrub information */
896 struct mutex scrub_lock;
897 atomic_t scrubs_running;
898 atomic_t scrub_pause_req;
899 atomic_t scrubs_paused;
900 atomic_t scrub_cancel_req;
901 wait_queue_head_t scrub_pause_wait;
903 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
906 refcount_t scrub_workers_refcnt;
907 struct btrfs_workqueue *scrub_workers;
908 struct btrfs_workqueue *scrub_wr_completion_workers;
909 struct btrfs_workqueue *scrub_parity_workers;
910 struct btrfs_subpage_info *subpage_info;
912 struct btrfs_discard_ctl discard_ctl;
914 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
915 u32 check_integrity_print_mask;
917 /* is qgroup tracking in a consistent state? */
920 /* holds configuration and tracking. Protected by qgroup_lock */
921 struct rb_root qgroup_tree;
922 spinlock_t qgroup_lock;
925 * used to avoid frequently calling ulist_alloc()/ulist_free()
926 * when doing qgroup accounting, it must be protected by qgroup_lock.
928 struct ulist *qgroup_ulist;
931 * Protect user change for quota operations. If a transaction is needed,
932 * it must be started before locking this lock.
934 struct mutex qgroup_ioctl_lock;
936 /* list of dirty qgroups to be written at next commit */
937 struct list_head dirty_qgroups;
939 /* used by qgroup for an efficient tree traversal */
942 /* qgroup rescan items */
943 struct mutex qgroup_rescan_lock; /* protects the progress item */
944 struct btrfs_key qgroup_rescan_progress;
945 struct btrfs_workqueue *qgroup_rescan_workers;
946 struct completion qgroup_rescan_completion;
947 struct btrfs_work qgroup_rescan_work;
948 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
950 /* filesystem state */
951 unsigned long fs_state;
953 struct btrfs_delayed_root *delayed_root;
956 spinlock_t reada_lock;
957 struct radix_tree_root reada_tree;
959 /* readahead works cnt */
960 atomic_t reada_works_cnt;
962 /* Extent buffer radix tree */
963 spinlock_t buffer_lock;
964 /* Entries are eb->start / sectorsize */
965 struct radix_tree_root buffer_radix;
967 /* next backup root to be overwritten */
968 int backup_root_index;
970 /* device replace state */
971 struct btrfs_dev_replace dev_replace;
973 struct semaphore uuid_tree_rescan_sem;
975 /* Used to reclaim the metadata space in the background. */
976 struct work_struct async_reclaim_work;
977 struct work_struct async_data_reclaim_work;
978 struct work_struct preempt_reclaim_work;
980 /* Reclaim partially filled block groups in the background */
981 struct work_struct reclaim_bgs_work;
982 struct list_head reclaim_bgs;
983 int bg_reclaim_threshold;
985 spinlock_t unused_bgs_lock;
986 struct list_head unused_bgs;
987 struct mutex unused_bg_unpin_mutex;
988 /* Protect block groups that are going to be deleted */
989 struct mutex reclaim_bgs_lock;
991 /* Cached block sizes */
994 /* ilog2 of sectorsize, use to avoid 64bit division */
1000 /* Block groups and devices containing active swapfiles. */
1001 spinlock_t swapfile_pins_lock;
1002 struct rb_root swapfile_pins;
1004 struct crypto_shash *csum_shash;
1006 spinlock_t send_reloc_lock;
1008 * Number of send operations in progress.
1009 * Updated while holding fs_info::send_reloc_lock.
1011 int send_in_progress;
1013 /* Type of exclusive operation running, protected by super_lock */
1014 enum btrfs_exclusive_operation exclusive_operation;
1017 * Zone size > 0 when in ZONED mode, otherwise it's used for a check
1018 * if the mode is enabled
1025 struct mutex zoned_meta_io_lock;
1026 spinlock_t treelog_bg_lock;
1030 * Start of the dedicated data relocation block group, protected by
1031 * relocation_bg_lock.
1033 spinlock_t relocation_bg_lock;
1036 spinlock_t zone_active_bgs_lock;
1037 struct list_head zone_active_bgs;
1039 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
1040 spinlock_t ref_verify_lock;
1041 struct rb_root block_tree;
1044 #ifdef CONFIG_BTRFS_DEBUG
1045 struct kobject *debug_kobj;
1046 struct kobject *discard_debug_kobj;
1047 struct list_head allocated_roots;
1049 spinlock_t eb_leak_lock;
1050 struct list_head allocated_ebs;
1054 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1056 return sb->s_fs_info;
1060 * The state of btrfs root
1064 * btrfs_record_root_in_trans is a multi-step process, and it can race
1065 * with the balancing code. But the race is very small, and only the
1066 * first time the root is added to each transaction. So IN_TRANS_SETUP
1067 * is used to tell us when more checks are required
1069 BTRFS_ROOT_IN_TRANS_SETUP,
1072 * Set if tree blocks of this root can be shared by other roots.
1073 * Only subvolume trees and their reloc trees have this bit set.
1074 * Conflicts with TRACK_DIRTY bit.
1076 * This affects two things:
1078 * - How balance works
1079 * For shareable roots, we need to use reloc tree and do path
1080 * replacement for balance, and need various pre/post hooks for
1081 * snapshot creation to handle them.
1083 * While for non-shareable trees, we just simply do a tree search
1086 * - How dirty roots are tracked
1087 * For shareable roots, btrfs_record_root_in_trans() is needed to
1088 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1089 * don't need to set this manually.
1091 BTRFS_ROOT_SHAREABLE,
1092 BTRFS_ROOT_TRACK_DIRTY,
1093 BTRFS_ROOT_IN_RADIX,
1094 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1095 BTRFS_ROOT_DEFRAG_RUNNING,
1096 BTRFS_ROOT_FORCE_COW,
1097 BTRFS_ROOT_MULTI_LOG_TASKS,
1099 BTRFS_ROOT_DELETING,
1102 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1104 * Set for the subvolume tree owning the reloc tree.
1106 BTRFS_ROOT_DEAD_RELOC_TREE,
1107 /* Mark dead root stored on device whose cleanup needs to be resumed */
1108 BTRFS_ROOT_DEAD_TREE,
1109 /* The root has a log tree. Used for subvolume roots and the tree root. */
1110 BTRFS_ROOT_HAS_LOG_TREE,
1111 /* Qgroup flushing is in progress */
1112 BTRFS_ROOT_QGROUP_FLUSHING,
1116 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1117 * code. For detail check comment in fs/btrfs/qgroup.c.
1119 struct btrfs_qgroup_swapped_blocks {
1121 /* RM_EMPTY_ROOT() of above blocks[] */
1123 struct rb_root blocks[BTRFS_MAX_LEVEL];
1127 * in ram representation of the tree. extent_root is used for all allocations
1128 * and for the extent tree extent_root root.
1131 struct extent_buffer *node;
1133 struct extent_buffer *commit_root;
1134 struct btrfs_root *log_root;
1135 struct btrfs_root *reloc_root;
1137 unsigned long state;
1138 struct btrfs_root_item root_item;
1139 struct btrfs_key root_key;
1140 struct btrfs_fs_info *fs_info;
1141 struct extent_io_tree dirty_log_pages;
1143 struct mutex objectid_mutex;
1145 spinlock_t accounting_lock;
1146 struct btrfs_block_rsv *block_rsv;
1148 struct mutex log_mutex;
1149 wait_queue_head_t log_writer_wait;
1150 wait_queue_head_t log_commit_wait[2];
1151 struct list_head log_ctxs[2];
1152 /* Used only for log trees of subvolumes, not for the log root tree */
1153 atomic_t log_writers;
1154 atomic_t log_commit[2];
1155 /* Used only for log trees of subvolumes, not for the log root tree */
1158 /* No matter the commit succeeds or not*/
1159 int log_transid_committed;
1160 /* Just be updated when the commit succeeds. */
1161 int last_log_commit;
1162 pid_t log_start_pid;
1170 struct btrfs_key defrag_progress;
1171 struct btrfs_key defrag_max;
1173 /* The dirty list is only used by non-shareable roots */
1174 struct list_head dirty_list;
1176 struct list_head root_list;
1178 spinlock_t log_extents_lock[2];
1179 struct list_head logged_list[2];
1181 int orphan_cleanup_state;
1183 spinlock_t inode_lock;
1184 /* red-black tree that keeps track of in-memory inodes */
1185 struct rb_root inode_tree;
1188 * radix tree that keeps track of delayed nodes of every inode,
1189 * protected by inode_lock
1191 struct radix_tree_root delayed_nodes_tree;
1193 * right now this just gets used so that a root has its own devid
1194 * for stat. It may be used for more later
1198 spinlock_t root_item_lock;
1201 struct mutex delalloc_mutex;
1202 spinlock_t delalloc_lock;
1204 * all of the inodes that have delalloc bytes. It is possible for
1205 * this list to be empty even when there is still dirty data=ordered
1206 * extents waiting to finish IO.
1208 struct list_head delalloc_inodes;
1209 struct list_head delalloc_root;
1210 u64 nr_delalloc_inodes;
1212 struct mutex ordered_extent_mutex;
1214 * this is used by the balancing code to wait for all the pending
1217 spinlock_t ordered_extent_lock;
1220 * all of the data=ordered extents pending writeback
1221 * these can span multiple transactions and basically include
1222 * every dirty data page that isn't from nodatacow
1224 struct list_head ordered_extents;
1225 struct list_head ordered_root;
1226 u64 nr_ordered_extents;
1229 * Not empty if this subvolume root has gone through tree block swap
1232 * Will be used by reloc_control::dirty_subvol_roots.
1234 struct list_head reloc_dirty_list;
1237 * Number of currently running SEND ioctls to prevent
1238 * manipulation with the read-only status via SUBVOL_SETFLAGS
1240 int send_in_progress;
1242 * Number of currently running deduplication operations that have a
1243 * destination inode belonging to this root. Protected by the lock
1246 int dedupe_in_progress;
1247 /* For exclusion of snapshot creation and nocow writes */
1248 struct btrfs_drew_lock snapshot_lock;
1250 atomic_t snapshot_force_cow;
1252 /* For qgroup metadata reserved space */
1253 spinlock_t qgroup_meta_rsv_lock;
1254 u64 qgroup_meta_rsv_pertrans;
1255 u64 qgroup_meta_rsv_prealloc;
1256 wait_queue_head_t qgroup_flush_wait;
1258 /* Number of active swapfiles */
1259 atomic_t nr_swapfiles;
1261 /* Record pairs of swapped blocks for qgroup */
1262 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1264 /* Used only by log trees, when logging csum items */
1265 struct extent_io_tree log_csum_range;
1267 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1271 #ifdef CONFIG_BTRFS_DEBUG
1272 struct list_head leak_list;
1277 * Structure that conveys information about an extent that is going to replace
1278 * all the extents in a file range.
1280 struct btrfs_replace_extent_info {
1286 /* Pointer to a file extent item of type regular or prealloc. */
1289 * Set to true when attempting to replace a file range with a new extent
1290 * described by this structure, set to false when attempting to clone an
1291 * existing extent into a file range.
1294 /* Meaningful only if is_new_extent is true. */
1295 int qgroup_reserved;
1297 * Meaningful only if is_new_extent is true.
1298 * Used to track how many extent items we have already inserted in a
1299 * subvolume tree that refer to the extent described by this structure,
1300 * so that we know when to create a new delayed ref or update an existing
1306 /* Arguments for btrfs_drop_extents() */
1307 struct btrfs_drop_extents_args {
1308 /* Input parameters */
1311 * If NULL, btrfs_drop_extents() will allocate and free its own path.
1312 * If 'replace_extent' is true, this must not be NULL. Also the path
1313 * is always released except if 'replace_extent' is true and
1314 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case
1315 * the path is kept locked.
1317 struct btrfs_path *path;
1318 /* Start offset of the range to drop extents from */
1320 /* End (exclusive, last byte + 1) of the range to drop extents from */
1322 /* If true drop all the extent maps in the range */
1325 * If true it means we want to insert a new extent after dropping all
1326 * the extents in the range. If this is true, the 'extent_item_size'
1327 * parameter must be set as well and the 'extent_inserted' field will
1328 * be set to true by btrfs_drop_extents() if it could insert the new
1330 * Note: when this is set to true the path must not be NULL.
1332 bool replace_extent;
1334 * Used if 'replace_extent' is true. Size of the file extent item to
1335 * insert after dropping all existing extents in the range
1337 u32 extent_item_size;
1339 /* Output parameters */
1342 * Set to the minimum between the input parameter 'end' and the end
1343 * (exclusive, last byte + 1) of the last dropped extent. This is always
1344 * set even if btrfs_drop_extents() returns an error.
1348 * The number of allocated bytes found in the range. This can be smaller
1349 * than the range's length when there are holes in the range.
1353 * Only set if 'replace_extent' is true. Set to true if we were able
1354 * to insert a replacement extent after dropping all extents in the
1355 * range, otherwise set to false by btrfs_drop_extents().
1356 * Also, if btrfs_drop_extents() has set this to true it means it
1357 * returned with the path locked, otherwise if it has set this to
1358 * false it has returned with the path released.
1360 bool extent_inserted;
1363 struct btrfs_file_private {
1368 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1371 return info->nodesize - sizeof(struct btrfs_header);
1374 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1376 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1378 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1381 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1383 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1386 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1387 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1388 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1390 return BTRFS_MAX_ITEM_SIZE(info) -
1391 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1394 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1396 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1400 * Flags for mount options.
1402 * Note: don't forget to add new options to btrfs_show_options()
1405 BTRFS_MOUNT_NODATASUM = (1UL << 0),
1406 BTRFS_MOUNT_NODATACOW = (1UL << 1),
1407 BTRFS_MOUNT_NOBARRIER = (1UL << 2),
1408 BTRFS_MOUNT_SSD = (1UL << 3),
1409 BTRFS_MOUNT_DEGRADED = (1UL << 4),
1410 BTRFS_MOUNT_COMPRESS = (1UL << 5),
1411 BTRFS_MOUNT_NOTREELOG = (1UL << 6),
1412 BTRFS_MOUNT_FLUSHONCOMMIT = (1UL << 7),
1413 BTRFS_MOUNT_SSD_SPREAD = (1UL << 8),
1414 BTRFS_MOUNT_NOSSD = (1UL << 9),
1415 BTRFS_MOUNT_DISCARD_SYNC = (1UL << 10),
1416 BTRFS_MOUNT_FORCE_COMPRESS = (1UL << 11),
1417 BTRFS_MOUNT_SPACE_CACHE = (1UL << 12),
1418 BTRFS_MOUNT_CLEAR_CACHE = (1UL << 13),
1419 BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED = (1UL << 14),
1420 BTRFS_MOUNT_ENOSPC_DEBUG = (1UL << 15),
1421 BTRFS_MOUNT_AUTO_DEFRAG = (1UL << 16),
1422 BTRFS_MOUNT_USEBACKUPROOT = (1UL << 17),
1423 BTRFS_MOUNT_SKIP_BALANCE = (1UL << 18),
1424 BTRFS_MOUNT_CHECK_INTEGRITY = (1UL << 19),
1425 BTRFS_MOUNT_CHECK_INTEGRITY_DATA = (1UL << 20),
1426 BTRFS_MOUNT_PANIC_ON_FATAL_ERROR = (1UL << 21),
1427 BTRFS_MOUNT_RESCAN_UUID_TREE = (1UL << 22),
1428 BTRFS_MOUNT_FRAGMENT_DATA = (1UL << 23),
1429 BTRFS_MOUNT_FRAGMENT_METADATA = (1UL << 24),
1430 BTRFS_MOUNT_FREE_SPACE_TREE = (1UL << 25),
1431 BTRFS_MOUNT_NOLOGREPLAY = (1UL << 26),
1432 BTRFS_MOUNT_REF_VERIFY = (1UL << 27),
1433 BTRFS_MOUNT_DISCARD_ASYNC = (1UL << 28),
1434 BTRFS_MOUNT_IGNOREBADROOTS = (1UL << 29),
1435 BTRFS_MOUNT_IGNOREDATACSUMS = (1UL << 30),
1438 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1439 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1441 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1442 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1443 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1444 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1447 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1449 if (!btrfs_test_opt(fs_info, opt)) \
1450 btrfs_info(fs_info, fmt, ##args); \
1451 btrfs_set_opt(fs_info->mount_opt, opt); \
1454 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1456 if (btrfs_test_opt(fs_info, opt)) \
1457 btrfs_info(fs_info, fmt, ##args); \
1458 btrfs_clear_opt(fs_info->mount_opt, opt); \
1462 * Requests for changes that need to be done during transaction commit.
1464 * Internal mount options that are used for special handling of the real
1465 * mount options (eg. cannot be set during remount and have to be set during
1466 * transaction commit)
1469 #define BTRFS_PENDING_COMMIT (0)
1471 #define btrfs_test_pending(info, opt) \
1472 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1473 #define btrfs_set_pending(info, opt) \
1474 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1475 #define btrfs_clear_pending(info, opt) \
1476 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1479 * Helpers for setting pending mount option changes.
1481 * Expects corresponding macros
1482 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1484 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1486 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1487 btrfs_info((info), fmt, ##args); \
1488 btrfs_set_pending((info), SET_##opt); \
1489 btrfs_clear_pending((info), CLEAR_##opt); \
1493 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1495 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1496 btrfs_info((info), fmt, ##args); \
1497 btrfs_set_pending((info), CLEAR_##opt); \
1498 btrfs_clear_pending((info), SET_##opt); \
1505 #define BTRFS_INODE_NODATASUM (1U << 0)
1506 #define BTRFS_INODE_NODATACOW (1U << 1)
1507 #define BTRFS_INODE_READONLY (1U << 2)
1508 #define BTRFS_INODE_NOCOMPRESS (1U << 3)
1509 #define BTRFS_INODE_PREALLOC (1U << 4)
1510 #define BTRFS_INODE_SYNC (1U << 5)
1511 #define BTRFS_INODE_IMMUTABLE (1U << 6)
1512 #define BTRFS_INODE_APPEND (1U << 7)
1513 #define BTRFS_INODE_NODUMP (1U << 8)
1514 #define BTRFS_INODE_NOATIME (1U << 9)
1515 #define BTRFS_INODE_DIRSYNC (1U << 10)
1516 #define BTRFS_INODE_COMPRESS (1U << 11)
1518 #define BTRFS_INODE_ROOT_ITEM_INIT (1U << 31)
1520 #define BTRFS_INODE_FLAG_MASK \
1521 (BTRFS_INODE_NODATASUM | \
1522 BTRFS_INODE_NODATACOW | \
1523 BTRFS_INODE_READONLY | \
1524 BTRFS_INODE_NOCOMPRESS | \
1525 BTRFS_INODE_PREALLOC | \
1526 BTRFS_INODE_SYNC | \
1527 BTRFS_INODE_IMMUTABLE | \
1528 BTRFS_INODE_APPEND | \
1529 BTRFS_INODE_NODUMP | \
1530 BTRFS_INODE_NOATIME | \
1531 BTRFS_INODE_DIRSYNC | \
1532 BTRFS_INODE_COMPRESS | \
1533 BTRFS_INODE_ROOT_ITEM_INIT)
1535 #define BTRFS_INODE_RO_VERITY (1U << 0)
1537 #define BTRFS_INODE_RO_FLAG_MASK (BTRFS_INODE_RO_VERITY)
1539 struct btrfs_map_token {
1540 struct extent_buffer *eb;
1542 unsigned long offset;
1545 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1546 ((bytes) >> (fs_info)->sectorsize_bits)
1548 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1549 struct extent_buffer *eb)
1552 token->kaddr = page_address(eb->pages[0]);
1556 /* some macros to generate set/get functions for the struct fields. This
1557 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1560 #define le8_to_cpu(v) (v)
1561 #define cpu_to_le8(v) (v)
1564 static inline u8 get_unaligned_le8(const void *p)
1569 static inline void put_unaligned_le8(u8 val, void *p)
1574 #define read_eb_member(eb, ptr, type, member, result) (\
1575 read_extent_buffer(eb, (char *)(result), \
1576 ((unsigned long)(ptr)) + \
1577 offsetof(type, member), \
1578 sizeof(((type *)0)->member)))
1580 #define write_eb_member(eb, ptr, type, member, result) (\
1581 write_extent_buffer(eb, (char *)(result), \
1582 ((unsigned long)(ptr)) + \
1583 offsetof(type, member), \
1584 sizeof(((type *)0)->member)))
1586 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1587 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1588 const void *ptr, unsigned long off); \
1589 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1590 const void *ptr, unsigned long off, \
1592 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1593 const void *ptr, unsigned long off); \
1594 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1595 unsigned long off, u##bits val);
1597 DECLARE_BTRFS_SETGET_BITS(8)
1598 DECLARE_BTRFS_SETGET_BITS(16)
1599 DECLARE_BTRFS_SETGET_BITS(32)
1600 DECLARE_BTRFS_SETGET_BITS(64)
1602 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1603 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1606 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1607 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1609 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1612 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1613 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1615 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1618 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1619 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1621 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1622 type *s, u##bits val) \
1624 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1625 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1628 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1629 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1631 const type *p = page_address(eb->pages[0]) + \
1632 offset_in_page(eb->start); \
1633 return get_unaligned_le##bits(&p->member); \
1635 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1638 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \
1639 put_unaligned_le##bits(val, &p->member); \
1642 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1643 static inline u##bits btrfs_##name(const type *s) \
1645 return get_unaligned_le##bits(&s->member); \
1647 static inline void btrfs_set_##name(type *s, u##bits val) \
1649 put_unaligned_le##bits(val, &s->member); \
1652 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1653 struct btrfs_dev_item *s)
1655 BUILD_BUG_ON(sizeof(u64) !=
1656 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1657 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1660 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1661 struct btrfs_dev_item *s,
1664 BUILD_BUG_ON(sizeof(u64) !=
1665 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1666 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1667 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1671 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1672 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1673 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1674 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1675 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1677 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1678 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1679 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1680 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1681 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1682 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1684 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1685 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1687 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1689 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1691 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1693 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1695 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1696 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1698 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1700 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1702 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1705 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1707 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1710 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1712 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1715 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1716 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1717 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1718 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1719 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1720 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1721 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1722 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1723 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1724 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1725 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1727 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1729 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1732 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1733 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1734 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1736 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1738 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1740 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1742 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1743 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1745 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1747 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1748 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1750 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1753 unsigned long offset = (unsigned long)c;
1754 offset += offsetof(struct btrfs_chunk, stripe);
1755 offset += nr * sizeof(struct btrfs_stripe);
1756 return (struct btrfs_stripe *)offset;
1759 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1761 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1764 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1765 struct btrfs_chunk *c, int nr)
1767 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1770 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1771 struct btrfs_chunk *c, int nr)
1773 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1776 /* struct btrfs_block_group_item */
1777 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1779 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1781 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1782 struct btrfs_block_group_item, chunk_objectid, 64);
1784 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1785 struct btrfs_block_group_item, chunk_objectid, 64);
1786 BTRFS_SETGET_FUNCS(block_group_flags,
1787 struct btrfs_block_group_item, flags, 64);
1788 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1789 struct btrfs_block_group_item, flags, 64);
1791 /* struct btrfs_free_space_info */
1792 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1794 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1796 /* struct btrfs_inode_ref */
1797 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1798 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1800 /* struct btrfs_inode_extref */
1801 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1802 parent_objectid, 64);
1803 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1805 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1807 /* struct btrfs_inode_item */
1808 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1809 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1810 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1811 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1812 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1813 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1814 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1815 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1816 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1817 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1818 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1819 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1820 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1822 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1824 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1826 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1827 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1829 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1831 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1832 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1833 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1834 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1835 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1836 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1837 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1838 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1839 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1840 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1842 /* struct btrfs_dev_extent */
1843 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1845 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1846 chunk_objectid, 64);
1847 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1849 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1850 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1851 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1853 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1855 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1857 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1858 struct btrfs_tree_block_info *item,
1859 struct btrfs_disk_key *key)
1861 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1864 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1865 struct btrfs_tree_block_info *item,
1866 struct btrfs_disk_key *key)
1868 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1871 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1873 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1875 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1877 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1880 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1883 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1885 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1888 static inline u32 btrfs_extent_inline_ref_size(int type)
1890 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1891 type == BTRFS_SHARED_BLOCK_REF_KEY)
1892 return sizeof(struct btrfs_extent_inline_ref);
1893 if (type == BTRFS_SHARED_DATA_REF_KEY)
1894 return sizeof(struct btrfs_shared_data_ref) +
1895 sizeof(struct btrfs_extent_inline_ref);
1896 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1897 return sizeof(struct btrfs_extent_data_ref) +
1898 offsetof(struct btrfs_extent_inline_ref, offset);
1902 /* struct btrfs_node */
1903 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1904 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1905 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1907 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1910 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1913 ptr = offsetof(struct btrfs_node, ptrs) +
1914 sizeof(struct btrfs_key_ptr) * nr;
1915 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1918 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1922 ptr = offsetof(struct btrfs_node, ptrs) +
1923 sizeof(struct btrfs_key_ptr) * nr;
1924 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1927 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1930 ptr = offsetof(struct btrfs_node, ptrs) +
1931 sizeof(struct btrfs_key_ptr) * nr;
1932 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1935 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1939 ptr = offsetof(struct btrfs_node, ptrs) +
1940 sizeof(struct btrfs_key_ptr) * nr;
1941 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1944 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1946 return offsetof(struct btrfs_node, ptrs) +
1947 sizeof(struct btrfs_key_ptr) * nr;
1950 void btrfs_node_key(const struct extent_buffer *eb,
1951 struct btrfs_disk_key *disk_key, int nr);
1953 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1954 struct btrfs_disk_key *disk_key, int nr)
1957 ptr = btrfs_node_key_ptr_offset(nr);
1958 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1959 struct btrfs_key_ptr, key, disk_key);
1962 /* struct btrfs_item */
1963 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1964 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1965 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1966 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1968 static inline unsigned long btrfs_item_nr_offset(int nr)
1970 return offsetof(struct btrfs_leaf, items) +
1971 sizeof(struct btrfs_item) * nr;
1974 static inline struct btrfs_item *btrfs_item_nr(int nr)
1976 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1979 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1980 struct btrfs_item *item)
1982 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1985 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1987 return btrfs_item_end(eb, btrfs_item_nr(nr));
1990 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1992 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1995 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1997 return btrfs_item_size(eb, btrfs_item_nr(nr));
2000 static inline void btrfs_item_key(const struct extent_buffer *eb,
2001 struct btrfs_disk_key *disk_key, int nr)
2003 struct btrfs_item *item = btrfs_item_nr(nr);
2004 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2007 static inline void btrfs_set_item_key(struct extent_buffer *eb,
2008 struct btrfs_disk_key *disk_key, int nr)
2010 struct btrfs_item *item = btrfs_item_nr(nr);
2011 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2014 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
2017 * struct btrfs_root_ref
2019 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
2020 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
2021 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
2023 /* struct btrfs_dir_item */
2024 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2025 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
2026 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2027 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2028 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
2029 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
2031 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
2033 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
2036 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
2037 const struct btrfs_dir_item *item,
2038 struct btrfs_disk_key *key)
2040 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2043 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
2044 struct btrfs_dir_item *item,
2045 const struct btrfs_disk_key *key)
2047 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2050 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
2052 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
2054 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2057 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2058 const struct btrfs_free_space_header *h,
2059 struct btrfs_disk_key *key)
2061 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2064 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2065 struct btrfs_free_space_header *h,
2066 const struct btrfs_disk_key *key)
2068 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2071 /* struct btrfs_disk_key */
2072 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2074 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2075 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2077 #ifdef __LITTLE_ENDIAN
2080 * Optimized helpers for little-endian architectures where CPU and on-disk
2081 * structures have the same endianness and we can skip conversions.
2084 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
2085 const struct btrfs_disk_key *disk_key)
2087 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
2090 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
2091 const struct btrfs_key *cpu_key)
2093 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
2096 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2097 struct btrfs_key *cpu_key, int nr)
2099 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2101 btrfs_node_key(eb, disk_key, nr);
2104 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2105 struct btrfs_key *cpu_key, int nr)
2107 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2109 btrfs_item_key(eb, disk_key, nr);
2112 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2113 const struct btrfs_dir_item *item,
2114 struct btrfs_key *cpu_key)
2116 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2118 btrfs_dir_item_key(eb, item, disk_key);
2123 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2124 const struct btrfs_disk_key *disk)
2126 cpu->offset = le64_to_cpu(disk->offset);
2127 cpu->type = disk->type;
2128 cpu->objectid = le64_to_cpu(disk->objectid);
2131 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2132 const struct btrfs_key *cpu)
2134 disk->offset = cpu_to_le64(cpu->offset);
2135 disk->type = cpu->type;
2136 disk->objectid = cpu_to_le64(cpu->objectid);
2139 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2140 struct btrfs_key *key, int nr)
2142 struct btrfs_disk_key disk_key;
2143 btrfs_node_key(eb, &disk_key, nr);
2144 btrfs_disk_key_to_cpu(key, &disk_key);
2147 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2148 struct btrfs_key *key, int nr)
2150 struct btrfs_disk_key disk_key;
2151 btrfs_item_key(eb, &disk_key, nr);
2152 btrfs_disk_key_to_cpu(key, &disk_key);
2155 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2156 const struct btrfs_dir_item *item,
2157 struct btrfs_key *key)
2159 struct btrfs_disk_key disk_key;
2160 btrfs_dir_item_key(eb, item, &disk_key);
2161 btrfs_disk_key_to_cpu(key, &disk_key);
2166 /* struct btrfs_header */
2167 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2168 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2170 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2171 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2172 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2173 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2174 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2176 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2177 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2179 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2181 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2183 return (btrfs_header_flags(eb) & flag) == flag;
2186 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2188 u64 flags = btrfs_header_flags(eb);
2189 btrfs_set_header_flags(eb, flags | flag);
2192 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2194 u64 flags = btrfs_header_flags(eb);
2195 btrfs_set_header_flags(eb, flags & ~flag);
2198 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2200 u64 flags = btrfs_header_flags(eb);
2201 return flags >> BTRFS_BACKREF_REV_SHIFT;
2204 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2207 u64 flags = btrfs_header_flags(eb);
2208 flags &= ~BTRFS_BACKREF_REV_MASK;
2209 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2210 btrfs_set_header_flags(eb, flags);
2213 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2215 return btrfs_header_level(eb) == 0;
2218 /* struct btrfs_root_item */
2219 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2221 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2222 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2223 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2225 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2227 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2228 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
2229 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2230 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2231 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2232 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2233 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2234 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2235 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2237 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2239 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2241 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2243 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2245 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2248 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2250 /* Byte-swap the constant at compile time, root_item::flags is LE */
2251 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2254 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2256 /* Byte-swap the constant at compile time, root_item::flags is LE */
2257 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2260 /* struct btrfs_root_backup */
2261 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2263 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2265 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2266 tree_root_level, 8);
2268 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2270 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2271 chunk_root_gen, 64);
2272 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2273 chunk_root_level, 8);
2275 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2277 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2278 extent_root_gen, 64);
2279 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2280 extent_root_level, 8);
2282 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2284 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2286 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2289 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2291 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2293 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2296 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2298 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2300 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2301 csum_root_level, 8);
2302 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2304 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2306 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2309 /* struct btrfs_balance_item */
2310 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2312 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2313 const struct btrfs_balance_item *bi,
2314 struct btrfs_disk_balance_args *ba)
2316 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2319 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2320 struct btrfs_balance_item *bi,
2321 const struct btrfs_disk_balance_args *ba)
2323 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2326 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2327 const struct btrfs_balance_item *bi,
2328 struct btrfs_disk_balance_args *ba)
2330 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2333 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2334 struct btrfs_balance_item *bi,
2335 const struct btrfs_disk_balance_args *ba)
2337 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2340 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2341 const struct btrfs_balance_item *bi,
2342 struct btrfs_disk_balance_args *ba)
2344 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2347 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2348 struct btrfs_balance_item *bi,
2349 const struct btrfs_disk_balance_args *ba)
2351 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2355 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2356 const struct btrfs_disk_balance_args *disk)
2358 memset(cpu, 0, sizeof(*cpu));
2360 cpu->profiles = le64_to_cpu(disk->profiles);
2361 cpu->usage = le64_to_cpu(disk->usage);
2362 cpu->devid = le64_to_cpu(disk->devid);
2363 cpu->pstart = le64_to_cpu(disk->pstart);
2364 cpu->pend = le64_to_cpu(disk->pend);
2365 cpu->vstart = le64_to_cpu(disk->vstart);
2366 cpu->vend = le64_to_cpu(disk->vend);
2367 cpu->target = le64_to_cpu(disk->target);
2368 cpu->flags = le64_to_cpu(disk->flags);
2369 cpu->limit = le64_to_cpu(disk->limit);
2370 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2371 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2375 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2376 const struct btrfs_balance_args *cpu)
2378 memset(disk, 0, sizeof(*disk));
2380 disk->profiles = cpu_to_le64(cpu->profiles);
2381 disk->usage = cpu_to_le64(cpu->usage);
2382 disk->devid = cpu_to_le64(cpu->devid);
2383 disk->pstart = cpu_to_le64(cpu->pstart);
2384 disk->pend = cpu_to_le64(cpu->pend);
2385 disk->vstart = cpu_to_le64(cpu->vstart);
2386 disk->vend = cpu_to_le64(cpu->vend);
2387 disk->target = cpu_to_le64(cpu->target);
2388 disk->flags = cpu_to_le64(cpu->flags);
2389 disk->limit = cpu_to_le64(cpu->limit);
2390 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2391 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2394 /* struct btrfs_super_block */
2395 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2396 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2397 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2399 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2400 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2401 struct btrfs_super_block, sys_chunk_array_size, 32);
2402 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2403 struct btrfs_super_block, chunk_root_generation, 64);
2404 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2406 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2408 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2409 chunk_root_level, 8);
2410 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2412 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2413 log_root_transid, 64);
2414 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2416 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2418 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2420 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2422 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2424 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2426 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2427 root_dir_objectid, 64);
2428 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2430 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2432 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2433 compat_ro_flags, 64);
2434 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2435 incompat_flags, 64);
2436 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2438 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2439 cache_generation, 64);
2440 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2441 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2442 uuid_tree_generation, 64);
2444 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2445 const char *btrfs_super_csum_name(u16 csum_type);
2446 const char *btrfs_super_csum_driver(u16 csum_type);
2447 size_t __attribute_const__ btrfs_get_num_csums(void);
2451 * The leaf data grows from end-to-front in the node.
2452 * this returns the address of the start of the last item,
2453 * which is the stop of the leaf data stack
2455 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2457 u32 nr = btrfs_header_nritems(leaf);
2460 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2461 return btrfs_item_offset_nr(leaf, nr - 1);
2464 /* struct btrfs_file_extent_item */
2465 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2467 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2468 struct btrfs_file_extent_item, disk_bytenr, 64);
2469 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2470 struct btrfs_file_extent_item, offset, 64);
2471 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2472 struct btrfs_file_extent_item, generation, 64);
2473 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2474 struct btrfs_file_extent_item, num_bytes, 64);
2475 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2476 struct btrfs_file_extent_item, ram_bytes, 64);
2477 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2478 struct btrfs_file_extent_item, disk_num_bytes, 64);
2479 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2480 struct btrfs_file_extent_item, compression, 8);
2482 static inline unsigned long
2483 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2485 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2488 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2490 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2493 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2494 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2496 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2498 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2499 disk_num_bytes, 64);
2500 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2502 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2504 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2506 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2508 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2510 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2511 other_encoding, 16);
2514 * this returns the number of bytes used by the item on disk, minus the
2515 * size of any extent headers. If a file is compressed on disk, this is
2516 * the compressed size
2518 static inline u32 btrfs_file_extent_inline_item_len(
2519 const struct extent_buffer *eb,
2520 struct btrfs_item *e)
2522 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2525 /* btrfs_qgroup_status_item */
2526 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2528 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2530 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2532 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2535 /* btrfs_qgroup_info_item */
2536 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2538 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2539 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2541 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2542 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2545 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2546 struct btrfs_qgroup_info_item, generation, 64);
2547 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2549 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2550 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2551 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2553 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2554 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2556 /* btrfs_qgroup_limit_item */
2557 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2559 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2561 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2563 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2565 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2568 /* btrfs_dev_replace_item */
2569 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2570 struct btrfs_dev_replace_item, src_devid, 64);
2571 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2572 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2574 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2576 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2578 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2580 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2581 num_write_errors, 64);
2582 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2583 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2585 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2587 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2590 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2591 struct btrfs_dev_replace_item, src_devid, 64);
2592 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2593 struct btrfs_dev_replace_item,
2594 cont_reading_from_srcdev_mode, 64);
2595 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2596 struct btrfs_dev_replace_item, replace_state, 64);
2597 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2598 struct btrfs_dev_replace_item, time_started, 64);
2599 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2600 struct btrfs_dev_replace_item, time_stopped, 64);
2601 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2602 struct btrfs_dev_replace_item, num_write_errors, 64);
2603 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2604 struct btrfs_dev_replace_item,
2605 num_uncorrectable_read_errors, 64);
2606 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2607 struct btrfs_dev_replace_item, cursor_left, 64);
2608 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2609 struct btrfs_dev_replace_item, cursor_right, 64);
2611 /* helper function to cast into the data area of the leaf. */
2612 #define btrfs_item_ptr(leaf, slot, type) \
2613 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2614 btrfs_item_offset_nr(leaf, slot)))
2616 #define btrfs_item_ptr_offset(leaf, slot) \
2617 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2618 btrfs_item_offset_nr(leaf, slot)))
2620 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2622 return crc32c(crc, address, length);
2625 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2627 put_unaligned_le32(~crc, result);
2630 static inline u64 btrfs_name_hash(const char *name, int len)
2632 return crc32c((u32)~1, name, len);
2636 * Figure the key offset of an extended inode ref
2638 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2641 return (u64) crc32c(parent_objectid, name, len);
2644 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2646 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2651 enum btrfs_inline_ref_type {
2652 BTRFS_REF_TYPE_INVALID,
2653 BTRFS_REF_TYPE_BLOCK,
2654 BTRFS_REF_TYPE_DATA,
2658 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2659 struct btrfs_extent_inline_ref *iref,
2660 enum btrfs_inline_ref_type is_data);
2661 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2664 * Take the number of bytes to be checksummmed and figure out how many leaves
2665 * it would require to store the csums for that many bytes.
2667 static inline u64 btrfs_csum_bytes_to_leaves(
2668 const struct btrfs_fs_info *fs_info, u64 csum_bytes)
2670 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
2672 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
2676 * Use this if we would be adding new items, as we could split nodes as we cow
2679 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2682 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2686 * Doing a truncate or a modification won't result in new nodes or leaves, just
2687 * what we need for COW.
2689 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2692 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2695 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2696 u64 start, u64 num_bytes);
2697 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2698 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2699 unsigned long count);
2700 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2701 struct btrfs_delayed_ref_root *delayed_refs,
2702 struct btrfs_delayed_ref_head *head);
2703 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2704 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2705 struct btrfs_fs_info *fs_info, u64 bytenr,
2706 u64 offset, int metadata, u64 *refs, u64 *flags);
2707 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2709 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2710 u64 bytenr, u64 num_bytes);
2711 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2712 int btrfs_cross_ref_exist(struct btrfs_root *root,
2713 u64 objectid, u64 offset, u64 bytenr, bool strict);
2714 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2715 struct btrfs_root *root,
2716 u64 parent, u64 root_objectid,
2717 const struct btrfs_disk_key *key,
2718 int level, u64 hint,
2720 enum btrfs_lock_nesting nest);
2721 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2722 struct btrfs_root *root,
2723 struct extent_buffer *buf,
2724 u64 parent, int last_ref);
2725 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2726 struct btrfs_root *root, u64 owner,
2727 u64 offset, u64 ram_bytes,
2728 struct btrfs_key *ins);
2729 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2730 u64 root_objectid, u64 owner, u64 offset,
2731 struct btrfs_key *ins);
2732 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2733 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2734 struct btrfs_key *ins, int is_data, int delalloc);
2735 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2736 struct extent_buffer *buf, int full_backref);
2737 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2738 struct extent_buffer *buf, int full_backref);
2739 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2740 struct extent_buffer *eb, u64 flags,
2741 int level, int is_data);
2742 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2744 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2745 u64 start, u64 len, int delalloc);
2746 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2748 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2749 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2750 struct btrfs_ref *generic_ref);
2752 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2755 * Different levels for to flush space when doing space reservations.
2757 * The higher the level, the more methods we try to reclaim space.
2759 enum btrfs_reserve_flush_enum {
2760 /* If we are in the transaction, we can't flush anything.*/
2761 BTRFS_RESERVE_NO_FLUSH,
2765 * - Running delayed inode items
2766 * - Allocating a new chunk
2768 BTRFS_RESERVE_FLUSH_LIMIT,
2772 * - Running delayed inode items
2773 * - Running delayed refs
2774 * - Running delalloc and waiting for ordered extents
2775 * - Allocating a new chunk
2777 BTRFS_RESERVE_FLUSH_EVICT,
2780 * Flush space by above mentioned methods and by:
2781 * - Running delayed iputs
2782 * - Committing transaction
2784 * Can be interrupted by a fatal signal.
2786 BTRFS_RESERVE_FLUSH_DATA,
2787 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2788 BTRFS_RESERVE_FLUSH_ALL,
2791 * Pretty much the same as FLUSH_ALL, but can also steal space from
2794 * Can be interrupted by a fatal signal.
2796 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2799 enum btrfs_flush_state {
2800 FLUSH_DELAYED_ITEMS_NR = 1,
2801 FLUSH_DELAYED_ITEMS = 2,
2802 FLUSH_DELAYED_REFS_NR = 3,
2803 FLUSH_DELAYED_REFS = 4,
2805 FLUSH_DELALLOC_WAIT = 6,
2806 FLUSH_DELALLOC_FULL = 7,
2808 ALLOC_CHUNK_FORCE = 9,
2809 RUN_DELAYED_IPUTS = 10,
2813 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2814 struct btrfs_block_rsv *rsv,
2815 int nitems, bool use_global_rsv);
2816 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2817 struct btrfs_block_rsv *rsv);
2818 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2820 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2821 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2822 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2823 u64 start, u64 end);
2824 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2825 u64 num_bytes, u64 *actual_bytes);
2826 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2828 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2829 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2830 struct btrfs_fs_info *fs_info);
2831 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2832 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2833 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2836 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2838 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2839 int btrfs_previous_item(struct btrfs_root *root,
2840 struct btrfs_path *path, u64 min_objectid,
2842 int btrfs_previous_extent_item(struct btrfs_root *root,
2843 struct btrfs_path *path, u64 min_objectid);
2844 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2845 struct btrfs_path *path,
2846 const struct btrfs_key *new_key);
2847 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2848 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2849 struct btrfs_key *key, int lowest_level,
2851 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2852 struct btrfs_path *path,
2854 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2857 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2858 struct btrfs_root *root, struct extent_buffer *buf,
2859 struct extent_buffer *parent, int parent_slot,
2860 struct extent_buffer **cow_ret,
2861 enum btrfs_lock_nesting nest);
2862 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2863 struct btrfs_root *root,
2864 struct extent_buffer *buf,
2865 struct extent_buffer **cow_ret, u64 new_root_objectid);
2866 int btrfs_block_can_be_shared(struct btrfs_root *root,
2867 struct extent_buffer *buf);
2868 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2869 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2870 int btrfs_split_item(struct btrfs_trans_handle *trans,
2871 struct btrfs_root *root,
2872 struct btrfs_path *path,
2873 const struct btrfs_key *new_key,
2874 unsigned long split_offset);
2875 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2876 struct btrfs_root *root,
2877 struct btrfs_path *path,
2878 const struct btrfs_key *new_key);
2879 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2880 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2881 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2882 const struct btrfs_key *key, struct btrfs_path *p,
2883 int ins_len, int cow);
2884 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2885 struct btrfs_path *p, u64 time_seq);
2886 int btrfs_search_slot_for_read(struct btrfs_root *root,
2887 const struct btrfs_key *key,
2888 struct btrfs_path *p, int find_higher,
2890 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2891 struct btrfs_root *root, struct extent_buffer *parent,
2892 int start_slot, u64 *last_ret,
2893 struct btrfs_key *progress);
2894 void btrfs_release_path(struct btrfs_path *p);
2895 struct btrfs_path *btrfs_alloc_path(void);
2896 void btrfs_free_path(struct btrfs_path *p);
2898 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2899 struct btrfs_path *path, int slot, int nr);
2900 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2901 struct btrfs_root *root,
2902 struct btrfs_path *path)
2904 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2908 * Describes a batch of items to insert in a btree. This is used by
2909 * btrfs_insert_empty_items().
2911 struct btrfs_item_batch {
2913 * Pointer to an array containing the keys of the items to insert (in
2916 const struct btrfs_key *keys;
2917 /* Pointer to an array containing the data size for each item to insert. */
2918 const u32 *data_sizes;
2920 * The sum of data sizes for all items. The caller can compute this while
2921 * setting up the data_sizes array, so it ends up being more efficient
2922 * than having btrfs_insert_empty_items() or setup_item_for_insert()
2923 * doing it, as it would avoid an extra loop over a potentially large
2924 * array, and in the case of setup_item_for_insert(), we would be doing
2925 * it while holding a write lock on a leaf and often on upper level nodes
2926 * too, unnecessarily increasing the size of a critical section.
2928 u32 total_data_size;
2929 /* Size of the keys and data_sizes arrays (number of items in the batch). */
2933 void btrfs_setup_item_for_insert(struct btrfs_root *root,
2934 struct btrfs_path *path,
2935 const struct btrfs_key *key,
2937 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2938 const struct btrfs_key *key, void *data, u32 data_size);
2939 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2940 struct btrfs_root *root,
2941 struct btrfs_path *path,
2942 const struct btrfs_item_batch *batch);
2944 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2945 struct btrfs_root *root,
2946 struct btrfs_path *path,
2947 const struct btrfs_key *key,
2950 struct btrfs_item_batch batch;
2953 batch.data_sizes = &data_size;
2954 batch.total_data_size = data_size;
2957 return btrfs_insert_empty_items(trans, root, path, &batch);
2960 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2961 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2964 int btrfs_search_backwards(struct btrfs_root *root, struct btrfs_key *key,
2965 struct btrfs_path *path);
2967 static inline int btrfs_next_old_item(struct btrfs_root *root,
2968 struct btrfs_path *p, u64 time_seq)
2971 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2972 return btrfs_next_old_leaf(root, p, time_seq);
2977 * Search the tree again to find a leaf with greater keys.
2979 * Returns 0 if it found something or 1 if there are no greater leaves.
2980 * Returns < 0 on error.
2982 static inline int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
2984 return btrfs_next_old_leaf(root, path, 0);
2987 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2989 return btrfs_next_old_item(root, p, 0);
2991 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2992 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2994 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2995 struct btrfs_root *root,
2996 struct extent_buffer *node,
2997 struct extent_buffer *parent);
2998 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
3001 * Do it this way so we only ever do one test_bit in the normal case.
3003 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
3004 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
3012 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
3013 * anything except sleeping. This function is used to check the status of
3015 * We check for BTRFS_FS_STATE_RO to avoid races with a concurrent remount,
3016 * since setting and checking for SB_RDONLY in the superblock's flags is not
3019 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
3021 return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) ||
3022 btrfs_fs_closing(fs_info);
3025 static inline void btrfs_set_sb_rdonly(struct super_block *sb)
3027 sb->s_flags |= SB_RDONLY;
3028 set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
3031 static inline void btrfs_clear_sb_rdonly(struct super_block *sb)
3033 sb->s_flags &= ~SB_RDONLY;
3034 clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
3038 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3039 u64 ref_id, u64 dirid, u64 sequence, const char *name,
3041 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
3042 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
3044 int btrfs_del_root(struct btrfs_trans_handle *trans,
3045 const struct btrfs_key *key);
3046 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3047 const struct btrfs_key *key,
3048 struct btrfs_root_item *item);
3049 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
3050 struct btrfs_root *root,
3051 struct btrfs_key *key,
3052 struct btrfs_root_item *item);
3053 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
3054 struct btrfs_path *path, struct btrfs_root_item *root_item,
3055 struct btrfs_key *root_key);
3056 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
3057 void btrfs_set_root_node(struct btrfs_root_item *item,
3058 struct extent_buffer *node);
3059 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3060 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
3061 struct btrfs_root *root);
3064 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3066 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
3068 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
3071 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
3072 const char *name, int name_len);
3073 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
3074 int name_len, struct btrfs_inode *dir,
3075 struct btrfs_key *location, u8 type, u64 index);
3076 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
3077 struct btrfs_root *root,
3078 struct btrfs_path *path, u64 dir,
3079 const char *name, int name_len,
3081 struct btrfs_dir_item *
3082 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
3083 struct btrfs_root *root,
3084 struct btrfs_path *path, u64 dir,
3085 u64 index, const char *name, int name_len,
3087 struct btrfs_dir_item *
3088 btrfs_search_dir_index_item(struct btrfs_root *root,
3089 struct btrfs_path *path, u64 dirid,
3090 const char *name, int name_len);
3091 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
3092 struct btrfs_root *root,
3093 struct btrfs_path *path,
3094 struct btrfs_dir_item *di);
3095 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3096 struct btrfs_root *root,
3097 struct btrfs_path *path, u64 objectid,
3098 const char *name, u16 name_len,
3099 const void *data, u16 data_len);
3100 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3101 struct btrfs_root *root,
3102 struct btrfs_path *path, u64 dir,
3103 const char *name, u16 name_len,
3105 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3106 struct btrfs_path *path,
3111 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3112 struct btrfs_root *root, u64 offset);
3113 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3114 struct btrfs_root *root, u64 offset);
3115 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3118 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3119 struct btrfs_root *root,
3120 const char *name, int name_len,
3121 u64 inode_objectid, u64 ref_objectid, u64 index);
3122 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3123 struct btrfs_root *root,
3124 const char *name, int name_len,
3125 u64 inode_objectid, u64 ref_objectid, u64 *index);
3126 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3127 struct btrfs_root *root,
3128 struct btrfs_path *path, u64 objectid);
3129 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3130 *root, struct btrfs_path *path,
3131 struct btrfs_key *location, int mod);
3133 struct btrfs_inode_extref *
3134 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3135 struct btrfs_root *root,
3136 struct btrfs_path *path,
3137 const char *name, int name_len,
3138 u64 inode_objectid, u64 ref_objectid, int ins_len,
3141 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
3142 int slot, const char *name,
3144 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
3145 struct extent_buffer *leaf, int slot, u64 ref_objectid,
3146 const char *name, int name_len);
3148 struct btrfs_dio_private;
3149 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3150 struct btrfs_root *root, u64 bytenr, u64 len);
3151 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst);
3152 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root,
3154 u64 objectid, u64 pos,
3155 u64 disk_offset, u64 disk_num_bytes,
3156 u64 num_bytes, u64 offset, u64 ram_bytes,
3157 u8 compression, u8 encryption, u16 other_encoding);
3158 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3159 struct btrfs_root *root,
3160 struct btrfs_path *path, u64 objectid,
3161 u64 bytenr, int mod);
3162 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3163 struct btrfs_root *root,
3164 struct btrfs_ordered_sum *sums);
3165 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
3166 u64 file_start, int contig);
3167 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3168 struct list_head *list, int search_commit);
3169 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3170 const struct btrfs_path *path,
3171 struct btrfs_file_extent_item *fi,
3172 const bool new_inline,
3173 struct extent_map *em);
3174 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
3176 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
3178 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
3179 u64 btrfs_file_extent_end(const struct btrfs_path *path);
3182 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
3183 int mirror_num, unsigned long bio_flags);
3184 unsigned int btrfs_verify_data_csum(struct btrfs_bio *bbio,
3185 u32 bio_offset, struct page *page,
3186 u64 start, u64 end);
3187 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3188 u64 start, u64 len);
3189 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3190 u64 *orig_start, u64 *orig_block_len,
3191 u64 *ram_bytes, bool strict);
3193 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3194 struct btrfs_inode *inode);
3195 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3196 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3197 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3198 struct btrfs_inode *dir, struct btrfs_inode *inode,
3199 const char *name, int name_len);
3200 int btrfs_add_link(struct btrfs_trans_handle *trans,
3201 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3202 const char *name, int name_len, int add_backref, u64 index);
3203 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3204 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
3206 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3207 struct btrfs_root *root,
3208 struct btrfs_inode *inode, u64 new_size,
3209 u32 min_type, u64 *extents_found);
3211 int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context);
3212 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr,
3213 bool in_reclaim_context);
3214 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
3215 unsigned int extra_bits,
3216 struct extent_state **cached_state);
3217 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3218 struct btrfs_root *new_root,
3219 struct btrfs_root *parent_root,
3220 struct user_namespace *mnt_userns);
3221 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3223 void btrfs_clear_delalloc_extent(struct inode *inode,
3224 struct extent_state *state, unsigned *bits);
3225 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3226 struct extent_state *other);
3227 void btrfs_split_delalloc_extent(struct inode *inode,
3228 struct extent_state *orig, u64 split);
3229 void btrfs_set_range_writeback(struct btrfs_inode *inode, u64 start, u64 end);
3230 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3231 int btrfs_readpage(struct file *file, struct page *page);
3232 void btrfs_evict_inode(struct inode *inode);
3233 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3234 struct inode *btrfs_alloc_inode(struct super_block *sb);
3235 void btrfs_destroy_inode(struct inode *inode);
3236 void btrfs_free_inode(struct inode *inode);
3237 int btrfs_drop_inode(struct inode *inode);
3238 int __init btrfs_init_cachep(void);
3239 void __cold btrfs_destroy_cachep(void);
3240 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3241 struct btrfs_root *root, struct btrfs_path *path);
3242 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3243 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3244 struct page *page, size_t pg_offset,
3245 u64 start, u64 end);
3246 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3247 struct btrfs_root *root, struct btrfs_inode *inode);
3248 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3249 struct btrfs_root *root, struct btrfs_inode *inode);
3250 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3251 struct btrfs_inode *inode);
3252 int btrfs_orphan_cleanup(struct btrfs_root *root);
3253 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size);
3254 void btrfs_add_delayed_iput(struct inode *inode);
3255 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3256 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3257 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3258 u64 start, u64 num_bytes, u64 min_size,
3259 loff_t actual_len, u64 *alloc_hint);
3260 int btrfs_prealloc_file_range_trans(struct inode *inode,
3261 struct btrfs_trans_handle *trans, int mode,
3262 u64 start, u64 num_bytes, u64 min_size,
3263 loff_t actual_len, u64 *alloc_hint);
3264 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3265 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3266 struct writeback_control *wbc);
3267 int btrfs_writepage_cow_fixup(struct page *page);
3268 void btrfs_writepage_endio_finish_ordered(struct btrfs_inode *inode,
3269 struct page *page, u64 start,
3270 u64 end, bool uptodate);
3271 extern const struct dentry_operations btrfs_dentry_operations;
3272 extern const struct iomap_ops btrfs_dio_iomap_ops;
3273 extern const struct iomap_dio_ops btrfs_dio_ops;
3275 /* Inode locking type flags, by default the exclusive lock is taken */
3276 #define BTRFS_ILOCK_SHARED (1U << 0)
3277 #define BTRFS_ILOCK_TRY (1U << 1)
3278 #define BTRFS_ILOCK_MMAP (1U << 2)
3280 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags);
3281 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags);
3282 void btrfs_update_inode_bytes(struct btrfs_inode *inode,
3283 const u64 add_bytes,
3284 const u64 del_bytes);
3287 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3288 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3289 int btrfs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
3290 int btrfs_fileattr_set(struct user_namespace *mnt_userns,
3291 struct dentry *dentry, struct fileattr *fa);
3292 int btrfs_ioctl_get_supported_features(void __user *arg);
3293 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3294 int __pure btrfs_is_empty_uuid(u8 *uuid);
3295 int btrfs_defrag_file(struct inode *inode, struct file_ra_state *ra,
3296 struct btrfs_ioctl_defrag_range_args *range,
3297 u64 newer_than, unsigned long max_to_defrag);
3298 void btrfs_get_block_group_info(struct list_head *groups_list,
3299 struct btrfs_ioctl_space_info *space);
3300 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3301 struct btrfs_ioctl_balance_args *bargs);
3302 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3303 enum btrfs_exclusive_operation type);
3304 bool btrfs_exclop_start_try_lock(struct btrfs_fs_info *fs_info,
3305 enum btrfs_exclusive_operation type);
3306 void btrfs_exclop_start_unlock(struct btrfs_fs_info *fs_info);
3307 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3310 int __init btrfs_auto_defrag_init(void);
3311 void __cold btrfs_auto_defrag_exit(void);
3312 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3313 struct btrfs_inode *inode);
3314 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3315 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3316 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3317 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3319 extern const struct file_operations btrfs_file_operations;
3320 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3321 struct btrfs_root *root, struct btrfs_inode *inode,
3322 struct btrfs_drop_extents_args *args);
3323 int btrfs_replace_file_extents(struct btrfs_inode *inode,
3324 struct btrfs_path *path, const u64 start,
3326 struct btrfs_replace_extent_info *extent_info,
3327 struct btrfs_trans_handle **trans_out);
3328 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3329 struct btrfs_inode *inode, u64 start, u64 end);
3330 int btrfs_release_file(struct inode *inode, struct file *file);
3331 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3332 size_t num_pages, loff_t pos, size_t write_bytes,
3333 struct extent_state **cached, bool noreserve);
3334 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3335 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3336 size_t *write_bytes);
3337 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3340 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3341 struct btrfs_root *root);
3344 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3345 unsigned long new_flags);
3346 int btrfs_sync_fs(struct super_block *sb, int wait);
3347 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3348 u64 subvol_objectid);
3350 static inline __printf(2, 3) __cold
3351 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3355 #ifdef CONFIG_PRINTK
3358 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3360 #define btrfs_printk(fs_info, fmt, args...) \
3361 btrfs_no_printk(fs_info, fmt, ##args)
3364 #define btrfs_emerg(fs_info, fmt, args...) \
3365 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3366 #define btrfs_alert(fs_info, fmt, args...) \
3367 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3368 #define btrfs_crit(fs_info, fmt, args...) \
3369 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3370 #define btrfs_err(fs_info, fmt, args...) \
3371 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3372 #define btrfs_warn(fs_info, fmt, args...) \
3373 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3374 #define btrfs_notice(fs_info, fmt, args...) \
3375 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3376 #define btrfs_info(fs_info, fmt, args...) \
3377 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3380 * Wrappers that use printk_in_rcu
3382 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3383 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3384 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3385 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3386 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3387 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3388 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3389 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3390 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3391 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3392 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3393 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3394 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3395 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3398 * Wrappers that use a ratelimited printk_in_rcu
3400 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3401 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3402 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3403 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3404 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3405 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3406 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3407 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3408 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3409 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3410 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3411 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3412 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3413 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3416 * Wrappers that use a ratelimited printk
3418 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3419 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3420 #define btrfs_alert_rl(fs_info, fmt, args...) \
3421 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3422 #define btrfs_crit_rl(fs_info, fmt, args...) \
3423 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3424 #define btrfs_err_rl(fs_info, fmt, args...) \
3425 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3426 #define btrfs_warn_rl(fs_info, fmt, args...) \
3427 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3428 #define btrfs_notice_rl(fs_info, fmt, args...) \
3429 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3430 #define btrfs_info_rl(fs_info, fmt, args...) \
3431 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3433 #if defined(CONFIG_DYNAMIC_DEBUG)
3434 #define btrfs_debug(fs_info, fmt, args...) \
3435 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3436 fs_info, KERN_DEBUG fmt, ##args)
3437 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3438 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3439 fs_info, KERN_DEBUG fmt, ##args)
3440 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3441 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3442 fs_info, KERN_DEBUG fmt, ##args)
3443 #define btrfs_debug_rl(fs_info, fmt, args...) \
3444 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3445 fs_info, KERN_DEBUG fmt, ##args)
3446 #elif defined(DEBUG)
3447 #define btrfs_debug(fs_info, fmt, args...) \
3448 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3449 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3450 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3451 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3452 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3453 #define btrfs_debug_rl(fs_info, fmt, args...) \
3454 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3456 #define btrfs_debug(fs_info, fmt, args...) \
3457 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3458 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3459 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3460 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3461 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3462 #define btrfs_debug_rl(fs_info, fmt, args...) \
3463 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3466 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3469 btrfs_printk(fs_info, fmt, ##args); \
3470 rcu_read_unlock(); \
3473 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3476 btrfs_no_printk(fs_info, fmt, ##args); \
3477 rcu_read_unlock(); \
3480 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3482 static DEFINE_RATELIMIT_STATE(_rs, \
3483 DEFAULT_RATELIMIT_INTERVAL, \
3484 DEFAULT_RATELIMIT_BURST); \
3485 if (__ratelimit(&_rs)) \
3486 btrfs_printk(fs_info, fmt, ##args); \
3489 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3492 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3493 rcu_read_unlock(); \
3496 #ifdef CONFIG_BTRFS_ASSERT
3498 static inline void assertfail(const char *expr, const char *file, int line)
3500 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3504 #define ASSERT(expr) \
3505 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3508 static inline void assertfail(const char *expr, const char* file, int line) { }
3509 #define ASSERT(expr) (void)(expr)
3512 #if BITS_PER_LONG == 32
3513 #define BTRFS_32BIT_MAX_FILE_SIZE (((u64)ULONG_MAX + 1) << PAGE_SHIFT)
3515 * The warning threshold is 5/8th of the MAX_LFS_FILESIZE that limits the logical
3516 * addresses of extents.
3518 * For 4K page size it's about 10T, for 64K it's 160T.
3520 #define BTRFS_32BIT_EARLY_WARN_THRESHOLD (BTRFS_32BIT_MAX_FILE_SIZE * 5 / 8)
3521 void btrfs_warn_32bit_limit(struct btrfs_fs_info *fs_info);
3522 void btrfs_err_32bit_limit(struct btrfs_fs_info *fs_info);
3526 * Get the correct offset inside the page of extent buffer.
3528 * @eb: target extent buffer
3529 * @start: offset inside the extent buffer
3531 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases.
3533 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb,
3534 unsigned long offset)
3537 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned
3538 * to PAGE_SIZE, thus adding it won't cause any difference.
3540 * For sectorsize < PAGE_SIZE, we must only read the data that belongs
3541 * to the eb, thus we have to take the eb->start into consideration.
3543 return offset_in_page(offset + eb->start);
3546 static inline unsigned long get_eb_page_index(unsigned long offset)
3549 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough.
3551 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE,
3552 * and have ensured that all tree blocks are contained in one page,
3553 * thus we always get index == 0.
3555 return offset >> PAGE_SHIFT;
3559 * Use that for functions that are conditionally exported for sanity tests but
3562 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3563 #define EXPORT_FOR_TESTS static
3565 #define EXPORT_FOR_TESTS
3569 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3572 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3577 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3578 unsigned int line, int errno, const char *fmt, ...);
3580 const char * __attribute_const__ btrfs_decode_error(int errno);
3583 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3584 const char *function,
3585 unsigned int line, int errno);
3588 * Call btrfs_abort_transaction as early as possible when an error condition is
3589 * detected, that way the exact line number is reported.
3591 #define btrfs_abort_transaction(trans, errno) \
3593 /* Report first abort since mount */ \
3594 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3595 &((trans)->fs_info->fs_state))) { \
3596 if ((errno) != -EIO && (errno) != -EROFS) { \
3597 WARN(1, KERN_DEBUG \
3598 "BTRFS: Transaction aborted (error %d)\n", \
3601 btrfs_debug((trans)->fs_info, \
3602 "Transaction aborted (error %d)", \
3606 __btrfs_abort_transaction((trans), __func__, \
3607 __LINE__, (errno)); \
3610 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3612 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3613 (errno), fmt, ##args); \
3616 #define BTRFS_FS_ERROR(fs_info) (unlikely(test_bit(BTRFS_FS_STATE_ERROR, \
3617 &(fs_info)->fs_state)))
3621 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3622 unsigned int line, int errno, const char *fmt, ...);
3624 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3625 * will panic(). Otherwise we BUG() here.
3627 #define btrfs_panic(fs_info, errno, fmt, args...) \
3629 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3634 /* compatibility and incompatibility defines */
3636 #define btrfs_set_fs_incompat(__fs_info, opt) \
3637 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3640 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3641 u64 flag, const char* name)
3643 struct btrfs_super_block *disk_super;
3646 disk_super = fs_info->super_copy;
3647 features = btrfs_super_incompat_flags(disk_super);
3648 if (!(features & flag)) {
3649 spin_lock(&fs_info->super_lock);
3650 features = btrfs_super_incompat_flags(disk_super);
3651 if (!(features & flag)) {
3653 btrfs_set_super_incompat_flags(disk_super, features);
3655 "setting incompat feature flag for %s (0x%llx)",
3658 spin_unlock(&fs_info->super_lock);
3662 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3663 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3666 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3667 u64 flag, const char* name)
3669 struct btrfs_super_block *disk_super;
3672 disk_super = fs_info->super_copy;
3673 features = btrfs_super_incompat_flags(disk_super);
3674 if (features & flag) {
3675 spin_lock(&fs_info->super_lock);
3676 features = btrfs_super_incompat_flags(disk_super);
3677 if (features & flag) {
3679 btrfs_set_super_incompat_flags(disk_super, features);
3681 "clearing incompat feature flag for %s (0x%llx)",
3684 spin_unlock(&fs_info->super_lock);
3688 #define btrfs_fs_incompat(fs_info, opt) \
3689 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3691 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3693 struct btrfs_super_block *disk_super;
3694 disk_super = fs_info->super_copy;
3695 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3698 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3699 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3702 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3703 u64 flag, const char *name)
3705 struct btrfs_super_block *disk_super;
3708 disk_super = fs_info->super_copy;
3709 features = btrfs_super_compat_ro_flags(disk_super);
3710 if (!(features & flag)) {
3711 spin_lock(&fs_info->super_lock);
3712 features = btrfs_super_compat_ro_flags(disk_super);
3713 if (!(features & flag)) {
3715 btrfs_set_super_compat_ro_flags(disk_super, features);
3717 "setting compat-ro feature flag for %s (0x%llx)",
3720 spin_unlock(&fs_info->super_lock);
3724 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3725 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3728 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3729 u64 flag, const char *name)
3731 struct btrfs_super_block *disk_super;
3734 disk_super = fs_info->super_copy;
3735 features = btrfs_super_compat_ro_flags(disk_super);
3736 if (features & flag) {
3737 spin_lock(&fs_info->super_lock);
3738 features = btrfs_super_compat_ro_flags(disk_super);
3739 if (features & flag) {
3741 btrfs_set_super_compat_ro_flags(disk_super, features);
3743 "clearing compat-ro feature flag for %s (0x%llx)",
3746 spin_unlock(&fs_info->super_lock);
3750 #define btrfs_fs_compat_ro(fs_info, opt) \
3751 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3753 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3755 struct btrfs_super_block *disk_super;
3756 disk_super = fs_info->super_copy;
3757 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3761 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3762 struct posix_acl *btrfs_get_acl(struct inode *inode, int type, bool rcu);
3763 int btrfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
3764 struct posix_acl *acl, int type);
3765 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3766 struct inode *inode, struct inode *dir);
3768 #define btrfs_get_acl NULL
3769 #define btrfs_set_acl NULL
3770 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3771 struct inode *inode, struct inode *dir)
3778 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3779 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3780 struct btrfs_root *root);
3781 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3782 struct btrfs_root *root);
3783 int btrfs_recover_relocation(struct btrfs_root *root);
3784 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3785 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3786 struct btrfs_root *root, struct extent_buffer *buf,
3787 struct extent_buffer *cow);
3788 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3789 u64 *bytes_to_reserve);
3790 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3791 struct btrfs_pending_snapshot *pending);
3792 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3793 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3795 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3798 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3799 u64 end, struct btrfs_scrub_progress *progress,
3800 int readonly, int is_dev_replace);
3801 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3802 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3803 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3804 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3805 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3806 struct btrfs_scrub_progress *progress);
3807 static inline void btrfs_init_full_stripe_locks_tree(
3808 struct btrfs_full_stripe_locks_tree *locks_root)
3810 locks_root->root = RB_ROOT;
3811 mutex_init(&locks_root->lock);
3815 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3816 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3817 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3819 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3821 btrfs_bio_counter_sub(fs_info, 1);
3825 struct reada_control {
3826 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3827 struct btrfs_key key_start;
3828 struct btrfs_key key_end; /* exclusive */
3831 wait_queue_head_t wait;
3833 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3834 struct btrfs_key *start, struct btrfs_key *end);
3835 int btrfs_reada_wait(void *handle);
3836 void btrfs_reada_detach(void *handle);
3837 int btree_readahead_hook(struct extent_buffer *eb, int err);
3838 void btrfs_reada_remove_dev(struct btrfs_device *dev);
3839 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev);
3841 static inline int is_fstree(u64 rootid)
3843 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3844 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3845 !btrfs_qgroup_level(rootid)))
3850 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3852 return signal_pending(current);
3856 #ifdef CONFIG_FS_VERITY
3858 extern const struct fsverity_operations btrfs_verityops;
3859 int btrfs_drop_verity_items(struct btrfs_inode *inode);
3861 BTRFS_SETGET_FUNCS(verity_descriptor_encryption, struct btrfs_verity_descriptor_item,
3863 BTRFS_SETGET_FUNCS(verity_descriptor_size, struct btrfs_verity_descriptor_item,
3865 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_encryption,
3866 struct btrfs_verity_descriptor_item, encryption, 8);
3867 BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_size,
3868 struct btrfs_verity_descriptor_item, size, 64);
3872 static inline int btrfs_drop_verity_items(struct btrfs_inode *inode)
3879 /* Sanity test specific functions */
3880 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3881 void btrfs_test_destroy_inode(struct inode *inode);
3882 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3884 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3887 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3893 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
3895 return fs_info->zoned != 0;
3898 static inline bool btrfs_is_data_reloc_root(const struct btrfs_root *root)
3900 return root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID;
3904 * We use page status Private2 to indicate there is an ordered extent with
3907 * Rename the Private2 accessors to Ordered, to improve readability.
3909 #define PageOrdered(page) PagePrivate2(page)
3910 #define SetPageOrdered(page) SetPagePrivate2(page)
3911 #define ClearPageOrdered(page) ClearPagePrivate2(page)