1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/unaligned.h>
21 #include <linux/pagemap.h>
22 #include <linux/btrfs.h>
23 #include <linux/btrfs_tree.h>
24 #include <linux/workqueue.h>
25 #include <linux/security.h>
26 #include <linux/sizes.h>
27 #include <linux/dynamic_debug.h>
28 #include <linux/refcount.h>
29 #include <linux/crc32c.h>
30 #include <linux/iomap.h>
31 #include "extent-io-tree.h"
32 #include "extent_io.h"
33 #include "extent_map.h"
34 #include "async-thread.h"
35 #include "block-rsv.h"
38 struct btrfs_trans_handle;
39 struct btrfs_transaction;
40 struct btrfs_pending_snapshot;
41 struct btrfs_delayed_ref_root;
42 struct btrfs_space_info;
43 struct btrfs_block_group;
44 extern struct kmem_cache *btrfs_trans_handle_cachep;
45 extern struct kmem_cache *btrfs_bit_radix_cachep;
46 extern struct kmem_cache *btrfs_path_cachep;
47 extern struct kmem_cache *btrfs_free_space_cachep;
48 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
49 struct btrfs_ordered_sum;
52 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
55 * Maximum number of mirrors that can be available for all profiles counting
56 * the target device of dev-replace as one. During an active device replace
57 * procedure, the target device of the copy operation is a mirror for the
58 * filesystem data as well that can be used to read data in order to repair
59 * read errors on other disks.
61 * Current value is derived from RAID1C4 with 4 copies.
63 #define BTRFS_MAX_MIRRORS (4 + 1)
65 #define BTRFS_MAX_LEVEL 8
67 #define BTRFS_OLDEST_GENERATION 0ULL
70 * we can actually store much bigger names, but lets not confuse the rest
73 #define BTRFS_NAME_LEN 255
76 * Theoretical limit is larger, but we keep this down to a sane
77 * value. That should limit greatly the possibility of collisions on
80 #define BTRFS_LINK_MAX 65535U
82 #define BTRFS_EMPTY_DIR_SIZE 0
84 /* ioprio of readahead is set to idle */
85 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
87 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
90 * Use large batch size to reduce overhead of metadata updates. On the reader
91 * side, we only read it when we are close to ENOSPC and the read overhead is
92 * mostly related to the number of CPUs, so it is OK to use arbitrary large
95 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
97 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
100 * Deltas are an effective way to populate global statistics. Give macro names
101 * to make it clear what we're doing. An example is discard_extents in
102 * btrfs_free_space_ctl.
104 #define BTRFS_STAT_NR_ENTRIES 2
105 #define BTRFS_STAT_CURR 0
106 #define BTRFS_STAT_PREV 1
109 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
111 static inline u32 count_max_extents(u64 size)
113 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
116 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
118 BUG_ON(num_stripes == 0);
119 return sizeof(struct btrfs_chunk) +
120 sizeof(struct btrfs_stripe) * (num_stripes - 1);
124 * Runtime (in-memory) states of filesystem
127 /* Global indicator of serious filesystem errors */
128 BTRFS_FS_STATE_ERROR,
130 * Filesystem is being remounted, allow to skip some operations, like
133 BTRFS_FS_STATE_REMOUNTING,
134 /* Filesystem in RO mode */
136 /* Track if a transaction abort has been reported on this filesystem */
137 BTRFS_FS_STATE_TRANS_ABORTED,
139 * Bio operations should be blocked on this filesystem because a source
140 * or target device is being destroyed as part of a device replace
142 BTRFS_FS_STATE_DEV_REPLACING,
143 /* The btrfs_fs_info created for self-tests */
144 BTRFS_FS_STATE_DUMMY_FS_INFO,
147 #define BTRFS_BACKREF_REV_MAX 256
148 #define BTRFS_BACKREF_REV_SHIFT 56
149 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
150 BTRFS_BACKREF_REV_SHIFT)
152 #define BTRFS_OLD_BACKREF_REV 0
153 #define BTRFS_MIXED_BACKREF_REV 1
156 * every tree block (leaf or node) starts with this header.
158 struct btrfs_header {
159 /* these first four must match the super block */
160 u8 csum[BTRFS_CSUM_SIZE];
161 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
162 __le64 bytenr; /* which block this node is supposed to live in */
165 /* allowed to be different from the super from here on down */
166 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
171 } __attribute__ ((__packed__));
174 * this is a very generous portion of the super block, giving us
175 * room to translate 14 chunks with 3 stripes each.
177 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
180 * just in case we somehow lose the roots and are not able to mount,
181 * we store an array of the roots from previous transactions
184 #define BTRFS_NUM_BACKUP_ROOTS 4
185 struct btrfs_root_backup {
187 __le64 tree_root_gen;
190 __le64 chunk_root_gen;
193 __le64 extent_root_gen;
202 __le64 csum_root_gen;
212 u8 extent_root_level;
216 /* future and to align */
218 } __attribute__ ((__packed__));
221 * the super block basically lists the main trees of the FS
222 * it currently lacks any block count etc etc
224 struct btrfs_super_block {
225 /* the first 4 fields must match struct btrfs_header */
226 u8 csum[BTRFS_CSUM_SIZE];
227 /* FS specific UUID, visible to user */
228 u8 fsid[BTRFS_FSID_SIZE];
229 __le64 bytenr; /* this block number */
232 /* allowed to be different from the btrfs_header from here own down */
239 /* this will help find the new super based on the log root */
240 __le64 log_root_transid;
243 __le64 root_dir_objectid;
247 __le32 __unused_leafsize;
249 __le32 sys_chunk_array_size;
250 __le64 chunk_root_generation;
252 __le64 compat_ro_flags;
253 __le64 incompat_flags;
258 struct btrfs_dev_item dev_item;
260 char label[BTRFS_LABEL_SIZE];
262 __le64 cache_generation;
263 __le64 uuid_tree_generation;
265 /* the UUID written into btree blocks */
266 u8 metadata_uuid[BTRFS_FSID_SIZE];
268 /* future expansion */
270 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
271 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
272 } __attribute__ ((__packed__));
275 * Compat flags that we support. If any incompat flags are set other than the
276 * ones specified below then we will fail to mount
278 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
279 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
280 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
282 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
283 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
284 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
286 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
287 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
289 #define BTRFS_FEATURE_INCOMPAT_SUPP \
290 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
291 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
292 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
293 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
294 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
295 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
296 BTRFS_FEATURE_INCOMPAT_RAID56 | \
297 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
298 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
299 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
300 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
301 BTRFS_FEATURE_INCOMPAT_RAID1C34 | \
302 BTRFS_FEATURE_INCOMPAT_ZONED)
304 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
305 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
306 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
309 * A leaf is full of items. offset and size tell us where to find
310 * the item in the leaf (relative to the start of the data area)
313 struct btrfs_disk_key key;
316 } __attribute__ ((__packed__));
319 * leaves have an item area and a data area:
320 * [item0, item1....itemN] [free space] [dataN...data1, data0]
322 * The data is separate from the items to get the keys closer together
326 struct btrfs_header header;
327 struct btrfs_item items[];
328 } __attribute__ ((__packed__));
331 * all non-leaf blocks are nodes, they hold only keys and pointers to
334 struct btrfs_key_ptr {
335 struct btrfs_disk_key key;
338 } __attribute__ ((__packed__));
341 struct btrfs_header header;
342 struct btrfs_key_ptr ptrs[];
343 } __attribute__ ((__packed__));
346 * btrfs_paths remember the path taken from the root down to the leaf.
347 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
348 * to any other levels that are present.
350 * The slots array records the index of the item or block pointer
351 * used while walking the tree.
353 enum { READA_NONE, READA_BACK, READA_FORWARD };
355 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
356 int slots[BTRFS_MAX_LEVEL];
357 /* if there is real range locking, this locks field will change */
358 u8 locks[BTRFS_MAX_LEVEL];
360 /* keep some upper locks as we walk down */
364 * set by btrfs_split_item, tells search_slot to keep all locks
365 * and to force calls to keep space in the nodes
367 unsigned int search_for_split:1;
368 unsigned int keep_locks:1;
369 unsigned int skip_locking:1;
370 unsigned int search_commit_root:1;
371 unsigned int need_commit_sem:1;
372 unsigned int skip_release_on_error:1;
374 * Indicate that new item (btrfs_search_slot) is extending already
375 * existing item and ins_len contains only the data size and not item
376 * header (ie. sizeof(struct btrfs_item) is not included).
378 unsigned int search_for_extension:1;
380 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
381 sizeof(struct btrfs_item))
382 struct btrfs_dev_replace {
383 u64 replace_state; /* see #define above */
384 time64_t time_started; /* seconds since 1-Jan-1970 */
385 time64_t time_stopped; /* seconds since 1-Jan-1970 */
386 atomic64_t num_write_errors;
387 atomic64_t num_uncorrectable_read_errors;
390 u64 committed_cursor_left;
391 u64 cursor_left_last_write_of_item;
394 u64 cont_reading_from_srcdev_mode; /* see #define above */
397 int item_needs_writeback;
398 struct btrfs_device *srcdev;
399 struct btrfs_device *tgtdev;
401 struct mutex lock_finishing_cancel_unmount;
402 struct rw_semaphore rwsem;
404 struct btrfs_scrub_progress scrub_progress;
406 struct percpu_counter bio_counter;
407 wait_queue_head_t replace_wait;
411 * free clusters are used to claim free space in relatively large chunks,
412 * allowing us to do less seeky writes. They are used for all metadata
413 * allocations. In ssd_spread mode they are also used for data allocations.
415 struct btrfs_free_cluster {
417 spinlock_t refill_lock;
420 /* largest extent in this cluster */
423 /* first extent starting offset */
426 /* We did a full search and couldn't create a cluster */
429 struct btrfs_block_group *block_group;
431 * when a cluster is allocated from a block group, we put the
432 * cluster onto a list in the block group so that it can
433 * be freed before the block group is freed.
435 struct list_head block_group_list;
438 enum btrfs_caching_type {
442 BTRFS_CACHE_FINISHED,
447 * Tree to record all locked full stripes of a RAID5/6 block group
449 struct btrfs_full_stripe_locks_tree {
454 /* Discard control. */
456 * Async discard uses multiple lists to differentiate the discard filter
457 * parameters. Index 0 is for completely free block groups where we need to
458 * ensure the entire block group is trimmed without being lossy. Indices
459 * afterwards represent monotonically decreasing discard filter sizes to
460 * prioritize what should be discarded next.
462 #define BTRFS_NR_DISCARD_LISTS 3
463 #define BTRFS_DISCARD_INDEX_UNUSED 0
464 #define BTRFS_DISCARD_INDEX_START 1
466 struct btrfs_discard_ctl {
467 struct workqueue_struct *discard_workers;
468 struct delayed_work work;
470 struct btrfs_block_group *block_group;
471 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
473 u64 prev_discard_time;
474 atomic_t discardable_extents;
475 atomic64_t discardable_bytes;
476 u64 max_discard_size;
480 u64 discard_extent_bytes;
481 u64 discard_bitmap_bytes;
482 atomic64_t discard_bytes_saved;
485 /* delayed seq elem */
487 struct list_head list;
491 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
493 #define SEQ_LAST ((u64)-1)
495 enum btrfs_orphan_cleanup_state {
496 ORPHAN_CLEANUP_STARTED = 1,
497 ORPHAN_CLEANUP_DONE = 2,
500 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
503 struct reloc_control;
505 struct btrfs_fs_devices;
506 struct btrfs_balance_control;
507 struct btrfs_delayed_root;
510 * Block group or device which contains an active swapfile. Used for preventing
511 * unsafe operations while a swapfile is active.
513 * These are sorted on (ptr, inode) (note that a block group or device can
514 * contain more than one swapfile). We compare the pointer values because we
515 * don't actually care what the object is, we just need a quick check whether
516 * the object exists in the rbtree.
518 struct btrfs_swapfile_pin {
523 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
524 * points to a struct btrfs_device.
528 * Only used when 'is_block_group' is true and it is the number of
529 * extents used by a swapfile for this block group ('ptr' field).
534 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
538 BTRFS_FS_CLOSING_START,
539 BTRFS_FS_CLOSING_DONE,
540 BTRFS_FS_LOG_RECOVERING,
542 BTRFS_FS_QUOTA_ENABLED,
543 BTRFS_FS_UPDATE_UUID_TREE_GEN,
544 BTRFS_FS_CREATING_FREE_SPACE_TREE,
548 BTRFS_FS_QUOTA_OVERRIDE,
549 /* Used to record internally whether fs has been frozen */
552 * Indicate that balance has been set up from the ioctl and is in the
553 * main phase. The fs_info::balance_ctl is initialized.
554 * Set and cleared while holding fs_info::balance_mutex.
556 BTRFS_FS_BALANCE_RUNNING,
558 /* Indicate that the cleaner thread is awake and doing something. */
559 BTRFS_FS_CLEANER_RUNNING,
562 * The checksumming has an optimized version and is considered fast,
563 * so we don't need to offload checksums to workqueues.
565 BTRFS_FS_CSUM_IMPL_FAST,
567 /* Indicate that the discard workqueue can service discards. */
568 BTRFS_FS_DISCARD_RUNNING,
570 /* Indicate that we need to cleanup space cache v1 */
571 BTRFS_FS_CLEANUP_SPACE_CACHE_V1,
573 /* Indicate that we can't trust the free space tree for caching yet */
574 BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED,
578 * Exclusive operations (device replace, resize, device add/remove, balance)
580 enum btrfs_exclusive_operation {
582 BTRFS_EXCLOP_BALANCE,
583 BTRFS_EXCLOP_DEV_ADD,
584 BTRFS_EXCLOP_DEV_REMOVE,
585 BTRFS_EXCLOP_DEV_REPLACE,
587 BTRFS_EXCLOP_SWAP_ACTIVATE,
590 struct btrfs_fs_info {
591 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
593 struct btrfs_root *extent_root;
594 struct btrfs_root *tree_root;
595 struct btrfs_root *chunk_root;
596 struct btrfs_root *dev_root;
597 struct btrfs_root *fs_root;
598 struct btrfs_root *csum_root;
599 struct btrfs_root *quota_root;
600 struct btrfs_root *uuid_root;
601 struct btrfs_root *free_space_root;
602 struct btrfs_root *data_reloc_root;
604 /* the log root tree is a directory of all the other log roots */
605 struct btrfs_root *log_root_tree;
607 spinlock_t fs_roots_radix_lock;
608 struct radix_tree_root fs_roots_radix;
610 /* block group cache stuff */
611 spinlock_t block_group_cache_lock;
612 u64 first_logical_byte;
613 struct rb_root block_group_cache_tree;
615 /* keep track of unallocated space */
616 atomic64_t free_chunk_space;
618 /* Track ranges which are used by log trees blocks/logged data extents */
619 struct extent_io_tree excluded_extents;
621 /* logical->physical extent mapping */
622 struct extent_map_tree mapping_tree;
625 * block reservation for extent, checksum, root tree and
626 * delayed dir index item
628 struct btrfs_block_rsv global_block_rsv;
629 /* block reservation for metadata operations */
630 struct btrfs_block_rsv trans_block_rsv;
631 /* block reservation for chunk tree */
632 struct btrfs_block_rsv chunk_block_rsv;
633 /* block reservation for delayed operations */
634 struct btrfs_block_rsv delayed_block_rsv;
635 /* block reservation for delayed refs */
636 struct btrfs_block_rsv delayed_refs_rsv;
638 struct btrfs_block_rsv empty_block_rsv;
641 u64 last_trans_committed;
642 u64 avg_delayed_ref_runtime;
645 * this is updated to the current trans every time a full commit
646 * is required instead of the faster short fsync log commits
648 u64 last_trans_log_full_commit;
649 unsigned long mount_opt;
651 * Track requests for actions that need to be done during transaction
652 * commit (like for some mount options).
654 unsigned long pending_changes;
655 unsigned long compress_type:4;
656 unsigned int compress_level;
659 * It is a suggestive number, the read side is safe even it gets a
660 * wrong number because we will write out the data into a regular
661 * extent. The write side(mount/remount) is under ->s_umount lock,
662 * so it is also safe.
666 struct btrfs_transaction *running_transaction;
667 wait_queue_head_t transaction_throttle;
668 wait_queue_head_t transaction_wait;
669 wait_queue_head_t transaction_blocked_wait;
670 wait_queue_head_t async_submit_wait;
673 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
674 * when they are updated.
676 * Because we do not clear the flags for ever, so we needn't use
677 * the lock on the read side.
679 * We also needn't use the lock when we mount the fs, because
680 * there is no other task which will update the flag.
682 spinlock_t super_lock;
683 struct btrfs_super_block *super_copy;
684 struct btrfs_super_block *super_for_commit;
685 struct super_block *sb;
686 struct inode *btree_inode;
687 struct mutex tree_log_mutex;
688 struct mutex transaction_kthread_mutex;
689 struct mutex cleaner_mutex;
690 struct mutex chunk_mutex;
693 * this is taken to make sure we don't set block groups ro after
694 * the free space cache has been allocated on them
696 struct mutex ro_block_group_mutex;
698 /* this is used during read/modify/write to make sure
699 * no two ios are trying to mod the same stripe at the same
702 struct btrfs_stripe_hash_table *stripe_hash_table;
705 * this protects the ordered operations list only while we are
706 * processing all of the entries on it. This way we make
707 * sure the commit code doesn't find the list temporarily empty
708 * because another function happens to be doing non-waiting preflush
709 * before jumping into the main commit.
711 struct mutex ordered_operations_mutex;
713 struct rw_semaphore commit_root_sem;
715 struct rw_semaphore cleanup_work_sem;
717 struct rw_semaphore subvol_sem;
719 spinlock_t trans_lock;
721 * the reloc mutex goes with the trans lock, it is taken
722 * during commit to protect us from the relocation code
724 struct mutex reloc_mutex;
726 struct list_head trans_list;
727 struct list_head dead_roots;
728 struct list_head caching_block_groups;
730 spinlock_t delayed_iput_lock;
731 struct list_head delayed_iputs;
732 atomic_t nr_delayed_iputs;
733 wait_queue_head_t delayed_iputs_wait;
735 atomic64_t tree_mod_seq;
737 /* this protects tree_mod_log and tree_mod_seq_list */
738 rwlock_t tree_mod_log_lock;
739 struct rb_root tree_mod_log;
740 struct list_head tree_mod_seq_list;
742 atomic_t async_delalloc_pages;
745 * this is used to protect the following list -- ordered_roots.
747 spinlock_t ordered_root_lock;
750 * all fs/file tree roots in which there are data=ordered extents
751 * pending writeback are added into this list.
753 * these can span multiple transactions and basically include
754 * every dirty data page that isn't from nodatacow
756 struct list_head ordered_roots;
758 struct mutex delalloc_root_mutex;
759 spinlock_t delalloc_root_lock;
760 /* all fs/file tree roots that have delalloc inodes. */
761 struct list_head delalloc_roots;
764 * there is a pool of worker threads for checksumming during writes
765 * and a pool for checksumming after reads. This is because readers
766 * can run with FS locks held, and the writers may be waiting for
767 * those locks. We don't want ordering in the pending list to cause
768 * deadlocks, and so the two are serviced separately.
770 * A third pool does submit_bio to avoid deadlocking with the other
773 struct btrfs_workqueue *workers;
774 struct btrfs_workqueue *delalloc_workers;
775 struct btrfs_workqueue *flush_workers;
776 struct btrfs_workqueue *endio_workers;
777 struct btrfs_workqueue *endio_meta_workers;
778 struct btrfs_workqueue *endio_raid56_workers;
779 struct btrfs_workqueue *rmw_workers;
780 struct btrfs_workqueue *endio_meta_write_workers;
781 struct btrfs_workqueue *endio_write_workers;
782 struct btrfs_workqueue *endio_freespace_worker;
783 struct btrfs_workqueue *caching_workers;
784 struct btrfs_workqueue *readahead_workers;
787 * fixup workers take dirty pages that didn't properly go through
788 * the cow mechanism and make them safe to write. It happens
789 * for the sys_munmap function call path
791 struct btrfs_workqueue *fixup_workers;
792 struct btrfs_workqueue *delayed_workers;
794 struct task_struct *transaction_kthread;
795 struct task_struct *cleaner_kthread;
796 u32 thread_pool_size;
798 struct kobject *space_info_kobj;
799 struct kobject *qgroups_kobj;
803 /* used to keep from writing metadata until there is a nice batch */
804 struct percpu_counter dirty_metadata_bytes;
805 struct percpu_counter delalloc_bytes;
806 struct percpu_counter ordered_bytes;
807 s32 dirty_metadata_batch;
810 struct list_head dirty_cowonly_roots;
812 struct btrfs_fs_devices *fs_devices;
815 * The space_info list is effectively read only after initial
816 * setup. It is populated at mount time and cleaned up after
817 * all block groups are removed. RCU is used to protect it.
819 struct list_head space_info;
821 struct btrfs_space_info *data_sinfo;
823 struct reloc_control *reloc_ctl;
825 /* data_alloc_cluster is only used in ssd_spread mode */
826 struct btrfs_free_cluster data_alloc_cluster;
828 /* all metadata allocations go through this cluster */
829 struct btrfs_free_cluster meta_alloc_cluster;
831 /* auto defrag inodes go here */
832 spinlock_t defrag_inodes_lock;
833 struct rb_root defrag_inodes;
834 atomic_t defrag_running;
836 /* Used to protect avail_{data, metadata, system}_alloc_bits */
837 seqlock_t profiles_lock;
839 * these three are in extended format (availability of single
840 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
841 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
843 u64 avail_data_alloc_bits;
844 u64 avail_metadata_alloc_bits;
845 u64 avail_system_alloc_bits;
847 /* restriper state */
848 spinlock_t balance_lock;
849 struct mutex balance_mutex;
850 atomic_t balance_pause_req;
851 atomic_t balance_cancel_req;
852 struct btrfs_balance_control *balance_ctl;
853 wait_queue_head_t balance_wait_q;
855 u32 data_chunk_allocations;
860 /* private scrub information */
861 struct mutex scrub_lock;
862 atomic_t scrubs_running;
863 atomic_t scrub_pause_req;
864 atomic_t scrubs_paused;
865 atomic_t scrub_cancel_req;
866 wait_queue_head_t scrub_pause_wait;
868 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
871 refcount_t scrub_workers_refcnt;
872 struct btrfs_workqueue *scrub_workers;
873 struct btrfs_workqueue *scrub_wr_completion_workers;
874 struct btrfs_workqueue *scrub_parity_workers;
876 struct btrfs_discard_ctl discard_ctl;
878 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
879 u32 check_integrity_print_mask;
881 /* is qgroup tracking in a consistent state? */
884 /* holds configuration and tracking. Protected by qgroup_lock */
885 struct rb_root qgroup_tree;
886 spinlock_t qgroup_lock;
889 * used to avoid frequently calling ulist_alloc()/ulist_free()
890 * when doing qgroup accounting, it must be protected by qgroup_lock.
892 struct ulist *qgroup_ulist;
895 * Protect user change for quota operations. If a transaction is needed,
896 * it must be started before locking this lock.
898 struct mutex qgroup_ioctl_lock;
900 /* list of dirty qgroups to be written at next commit */
901 struct list_head dirty_qgroups;
903 /* used by qgroup for an efficient tree traversal */
906 /* qgroup rescan items */
907 struct mutex qgroup_rescan_lock; /* protects the progress item */
908 struct btrfs_key qgroup_rescan_progress;
909 struct btrfs_workqueue *qgroup_rescan_workers;
910 struct completion qgroup_rescan_completion;
911 struct btrfs_work qgroup_rescan_work;
912 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
914 /* filesystem state */
915 unsigned long fs_state;
917 struct btrfs_delayed_root *delayed_root;
920 spinlock_t reada_lock;
921 struct radix_tree_root reada_tree;
923 /* readahead works cnt */
924 atomic_t reada_works_cnt;
926 /* Extent buffer radix tree */
927 spinlock_t buffer_lock;
928 /* Entries are eb->start / sectorsize */
929 struct radix_tree_root buffer_radix;
931 /* next backup root to be overwritten */
932 int backup_root_index;
934 /* device replace state */
935 struct btrfs_dev_replace dev_replace;
937 struct semaphore uuid_tree_rescan_sem;
939 /* Used to reclaim the metadata space in the background. */
940 struct work_struct async_reclaim_work;
941 struct work_struct async_data_reclaim_work;
942 struct work_struct preempt_reclaim_work;
944 spinlock_t unused_bgs_lock;
945 struct list_head unused_bgs;
946 struct mutex unused_bg_unpin_mutex;
947 struct mutex delete_unused_bgs_mutex;
949 /* Cached block sizes */
952 /* ilog2 of sectorsize, use to avoid 64bit division */
958 /* Block groups and devices containing active swapfiles. */
959 spinlock_t swapfile_pins_lock;
960 struct rb_root swapfile_pins;
962 struct crypto_shash *csum_shash;
965 * Number of send operations in progress.
966 * Updated while holding fs_info::balance_mutex.
968 int send_in_progress;
970 /* Type of exclusive operation running */
971 unsigned long exclusive_operation;
974 * Zone size > 0 when in ZONED mode, otherwise it's used for a check
975 * if the mode is enabled
982 /* Max size to emit ZONE_APPEND write command */
983 u64 max_zone_append_size;
984 struct mutex zoned_meta_io_lock;
985 spinlock_t treelog_bg_lock;
988 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
989 spinlock_t ref_verify_lock;
990 struct rb_root block_tree;
993 #ifdef CONFIG_BTRFS_DEBUG
994 struct kobject *debug_kobj;
995 struct kobject *discard_debug_kobj;
996 struct list_head allocated_roots;
998 spinlock_t eb_leak_lock;
999 struct list_head allocated_ebs;
1003 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
1005 return sb->s_fs_info;
1009 * The state of btrfs root
1013 * btrfs_record_root_in_trans is a multi-step process, and it can race
1014 * with the balancing code. But the race is very small, and only the
1015 * first time the root is added to each transaction. So IN_TRANS_SETUP
1016 * is used to tell us when more checks are required
1018 BTRFS_ROOT_IN_TRANS_SETUP,
1021 * Set if tree blocks of this root can be shared by other roots.
1022 * Only subvolume trees and their reloc trees have this bit set.
1023 * Conflicts with TRACK_DIRTY bit.
1025 * This affects two things:
1027 * - How balance works
1028 * For shareable roots, we need to use reloc tree and do path
1029 * replacement for balance, and need various pre/post hooks for
1030 * snapshot creation to handle them.
1032 * While for non-shareable trees, we just simply do a tree search
1035 * - How dirty roots are tracked
1036 * For shareable roots, btrfs_record_root_in_trans() is needed to
1037 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1038 * don't need to set this manually.
1040 BTRFS_ROOT_SHAREABLE,
1041 BTRFS_ROOT_TRACK_DIRTY,
1042 BTRFS_ROOT_IN_RADIX,
1043 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1044 BTRFS_ROOT_DEFRAG_RUNNING,
1045 BTRFS_ROOT_FORCE_COW,
1046 BTRFS_ROOT_MULTI_LOG_TASKS,
1048 BTRFS_ROOT_DELETING,
1051 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1053 * Set for the subvolume tree owning the reloc tree.
1055 BTRFS_ROOT_DEAD_RELOC_TREE,
1056 /* Mark dead root stored on device whose cleanup needs to be resumed */
1057 BTRFS_ROOT_DEAD_TREE,
1058 /* The root has a log tree. Used for subvolume roots and the tree root. */
1059 BTRFS_ROOT_HAS_LOG_TREE,
1060 /* Qgroup flushing is in progress */
1061 BTRFS_ROOT_QGROUP_FLUSHING,
1065 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1066 * code. For detail check comment in fs/btrfs/qgroup.c.
1068 struct btrfs_qgroup_swapped_blocks {
1070 /* RM_EMPTY_ROOT() of above blocks[] */
1072 struct rb_root blocks[BTRFS_MAX_LEVEL];
1076 * in ram representation of the tree. extent_root is used for all allocations
1077 * and for the extent tree extent_root root.
1080 struct extent_buffer *node;
1082 struct extent_buffer *commit_root;
1083 struct btrfs_root *log_root;
1084 struct btrfs_root *reloc_root;
1086 unsigned long state;
1087 struct btrfs_root_item root_item;
1088 struct btrfs_key root_key;
1089 struct btrfs_fs_info *fs_info;
1090 struct extent_io_tree dirty_log_pages;
1092 struct mutex objectid_mutex;
1094 spinlock_t accounting_lock;
1095 struct btrfs_block_rsv *block_rsv;
1097 struct mutex log_mutex;
1098 wait_queue_head_t log_writer_wait;
1099 wait_queue_head_t log_commit_wait[2];
1100 struct list_head log_ctxs[2];
1101 /* Used only for log trees of subvolumes, not for the log root tree */
1102 atomic_t log_writers;
1103 atomic_t log_commit[2];
1104 /* Used only for log trees of subvolumes, not for the log root tree */
1107 /* No matter the commit succeeds or not*/
1108 int log_transid_committed;
1109 /* Just be updated when the commit succeeds. */
1110 int last_log_commit;
1111 pid_t log_start_pid;
1119 struct btrfs_key defrag_progress;
1120 struct btrfs_key defrag_max;
1122 /* The dirty list is only used by non-shareable roots */
1123 struct list_head dirty_list;
1125 struct list_head root_list;
1127 spinlock_t log_extents_lock[2];
1128 struct list_head logged_list[2];
1130 int orphan_cleanup_state;
1132 spinlock_t inode_lock;
1133 /* red-black tree that keeps track of in-memory inodes */
1134 struct rb_root inode_tree;
1137 * radix tree that keeps track of delayed nodes of every inode,
1138 * protected by inode_lock
1140 struct radix_tree_root delayed_nodes_tree;
1142 * right now this just gets used so that a root has its own devid
1143 * for stat. It may be used for more later
1147 spinlock_t root_item_lock;
1150 struct mutex delalloc_mutex;
1151 spinlock_t delalloc_lock;
1153 * all of the inodes that have delalloc bytes. It is possible for
1154 * this list to be empty even when there is still dirty data=ordered
1155 * extents waiting to finish IO.
1157 struct list_head delalloc_inodes;
1158 struct list_head delalloc_root;
1159 u64 nr_delalloc_inodes;
1161 struct mutex ordered_extent_mutex;
1163 * this is used by the balancing code to wait for all the pending
1166 spinlock_t ordered_extent_lock;
1169 * all of the data=ordered extents pending writeback
1170 * these can span multiple transactions and basically include
1171 * every dirty data page that isn't from nodatacow
1173 struct list_head ordered_extents;
1174 struct list_head ordered_root;
1175 u64 nr_ordered_extents;
1178 * Not empty if this subvolume root has gone through tree block swap
1181 * Will be used by reloc_control::dirty_subvol_roots.
1183 struct list_head reloc_dirty_list;
1186 * Number of currently running SEND ioctls to prevent
1187 * manipulation with the read-only status via SUBVOL_SETFLAGS
1189 int send_in_progress;
1191 * Number of currently running deduplication operations that have a
1192 * destination inode belonging to this root. Protected by the lock
1195 int dedupe_in_progress;
1196 /* For exclusion of snapshot creation and nocow writes */
1197 struct btrfs_drew_lock snapshot_lock;
1199 atomic_t snapshot_force_cow;
1201 /* For qgroup metadata reserved space */
1202 spinlock_t qgroup_meta_rsv_lock;
1203 u64 qgroup_meta_rsv_pertrans;
1204 u64 qgroup_meta_rsv_prealloc;
1205 wait_queue_head_t qgroup_flush_wait;
1207 /* Number of active swapfiles */
1208 atomic_t nr_swapfiles;
1210 /* Record pairs of swapped blocks for qgroup */
1211 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1213 /* Used only by log trees, when logging csum items */
1214 struct extent_io_tree log_csum_range;
1216 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1220 #ifdef CONFIG_BTRFS_DEBUG
1221 struct list_head leak_list;
1226 * Structure that conveys information about an extent that is going to replace
1227 * all the extents in a file range.
1229 struct btrfs_replace_extent_info {
1235 /* Pointer to a file extent item of type regular or prealloc. */
1238 * Set to true when attempting to replace a file range with a new extent
1239 * described by this structure, set to false when attempting to clone an
1240 * existing extent into a file range.
1243 /* Meaningful only if is_new_extent is true. */
1244 int qgroup_reserved;
1246 * Meaningful only if is_new_extent is true.
1247 * Used to track how many extent items we have already inserted in a
1248 * subvolume tree that refer to the extent described by this structure,
1249 * so that we know when to create a new delayed ref or update an existing
1255 /* Arguments for btrfs_drop_extents() */
1256 struct btrfs_drop_extents_args {
1257 /* Input parameters */
1260 * If NULL, btrfs_drop_extents() will allocate and free its own path.
1261 * If 'replace_extent' is true, this must not be NULL. Also the path
1262 * is always released except if 'replace_extent' is true and
1263 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case
1264 * the path is kept locked.
1266 struct btrfs_path *path;
1267 /* Start offset of the range to drop extents from */
1269 /* End (exclusive, last byte + 1) of the range to drop extents from */
1271 /* If true drop all the extent maps in the range */
1274 * If true it means we want to insert a new extent after dropping all
1275 * the extents in the range. If this is true, the 'extent_item_size'
1276 * parameter must be set as well and the 'extent_inserted' field will
1277 * be set to true by btrfs_drop_extents() if it could insert the new
1279 * Note: when this is set to true the path must not be NULL.
1281 bool replace_extent;
1283 * Used if 'replace_extent' is true. Size of the file extent item to
1284 * insert after dropping all existing extents in the range
1286 u32 extent_item_size;
1288 /* Output parameters */
1291 * Set to the minimum between the input parameter 'end' and the end
1292 * (exclusive, last byte + 1) of the last dropped extent. This is always
1293 * set even if btrfs_drop_extents() returns an error.
1297 * The number of allocated bytes found in the range. This can be smaller
1298 * than the range's length when there are holes in the range.
1302 * Only set if 'replace_extent' is true. Set to true if we were able
1303 * to insert a replacement extent after dropping all extents in the
1304 * range, otherwise set to false by btrfs_drop_extents().
1305 * Also, if btrfs_drop_extents() has set this to true it means it
1306 * returned with the path locked, otherwise if it has set this to
1307 * false it has returned with the path released.
1309 bool extent_inserted;
1312 struct btrfs_file_private {
1317 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1320 return info->nodesize - sizeof(struct btrfs_header);
1323 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1325 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1327 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1330 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1332 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1335 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1336 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1337 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1339 return BTRFS_MAX_ITEM_SIZE(info) -
1340 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1343 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1345 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1349 * Flags for mount options.
1351 * Note: don't forget to add new options to btrfs_show_options()
1353 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1354 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1355 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1356 #define BTRFS_MOUNT_SSD (1 << 3)
1357 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1358 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1359 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1360 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1361 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1362 #define BTRFS_MOUNT_NOSSD (1 << 9)
1363 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1364 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1365 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1366 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1367 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1368 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1369 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1370 /* bit 17 is free */
1371 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1372 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1373 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1374 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1375 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1376 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1377 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1378 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1379 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1380 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1381 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1382 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1383 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30)
1384 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31)
1386 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1387 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1389 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1390 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1391 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1392 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1395 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1397 if (!btrfs_test_opt(fs_info, opt)) \
1398 btrfs_info(fs_info, fmt, ##args); \
1399 btrfs_set_opt(fs_info->mount_opt, opt); \
1402 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1404 if (btrfs_test_opt(fs_info, opt)) \
1405 btrfs_info(fs_info, fmt, ##args); \
1406 btrfs_clear_opt(fs_info->mount_opt, opt); \
1410 * Requests for changes that need to be done during transaction commit.
1412 * Internal mount options that are used for special handling of the real
1413 * mount options (eg. cannot be set during remount and have to be set during
1414 * transaction commit)
1417 #define BTRFS_PENDING_COMMIT (0)
1419 #define btrfs_test_pending(info, opt) \
1420 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1421 #define btrfs_set_pending(info, opt) \
1422 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1423 #define btrfs_clear_pending(info, opt) \
1424 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1427 * Helpers for setting pending mount option changes.
1429 * Expects corresponding macros
1430 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1432 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1434 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1435 btrfs_info((info), fmt, ##args); \
1436 btrfs_set_pending((info), SET_##opt); \
1437 btrfs_clear_pending((info), CLEAR_##opt); \
1441 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1443 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1444 btrfs_info((info), fmt, ##args); \
1445 btrfs_set_pending((info), CLEAR_##opt); \
1446 btrfs_clear_pending((info), SET_##opt); \
1453 #define BTRFS_INODE_NODATASUM (1 << 0)
1454 #define BTRFS_INODE_NODATACOW (1 << 1)
1455 #define BTRFS_INODE_READONLY (1 << 2)
1456 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1457 #define BTRFS_INODE_PREALLOC (1 << 4)
1458 #define BTRFS_INODE_SYNC (1 << 5)
1459 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1460 #define BTRFS_INODE_APPEND (1 << 7)
1461 #define BTRFS_INODE_NODUMP (1 << 8)
1462 #define BTRFS_INODE_NOATIME (1 << 9)
1463 #define BTRFS_INODE_DIRSYNC (1 << 10)
1464 #define BTRFS_INODE_COMPRESS (1 << 11)
1466 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1468 #define BTRFS_INODE_FLAG_MASK \
1469 (BTRFS_INODE_NODATASUM | \
1470 BTRFS_INODE_NODATACOW | \
1471 BTRFS_INODE_READONLY | \
1472 BTRFS_INODE_NOCOMPRESS | \
1473 BTRFS_INODE_PREALLOC | \
1474 BTRFS_INODE_SYNC | \
1475 BTRFS_INODE_IMMUTABLE | \
1476 BTRFS_INODE_APPEND | \
1477 BTRFS_INODE_NODUMP | \
1478 BTRFS_INODE_NOATIME | \
1479 BTRFS_INODE_DIRSYNC | \
1480 BTRFS_INODE_COMPRESS | \
1481 BTRFS_INODE_ROOT_ITEM_INIT)
1483 struct btrfs_map_token {
1484 struct extent_buffer *eb;
1486 unsigned long offset;
1489 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1490 ((bytes) >> (fs_info)->sectorsize_bits)
1492 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1493 struct extent_buffer *eb)
1496 token->kaddr = page_address(eb->pages[0]);
1500 /* some macros to generate set/get functions for the struct fields. This
1501 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1504 #define le8_to_cpu(v) (v)
1505 #define cpu_to_le8(v) (v)
1508 static inline u8 get_unaligned_le8(const void *p)
1513 static inline void put_unaligned_le8(u8 val, void *p)
1518 #define read_eb_member(eb, ptr, type, member, result) (\
1519 read_extent_buffer(eb, (char *)(result), \
1520 ((unsigned long)(ptr)) + \
1521 offsetof(type, member), \
1522 sizeof(((type *)0)->member)))
1524 #define write_eb_member(eb, ptr, type, member, result) (\
1525 write_extent_buffer(eb, (char *)(result), \
1526 ((unsigned long)(ptr)) + \
1527 offsetof(type, member), \
1528 sizeof(((type *)0)->member)))
1530 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1531 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1532 const void *ptr, unsigned long off); \
1533 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1534 const void *ptr, unsigned long off, \
1536 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1537 const void *ptr, unsigned long off); \
1538 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1539 unsigned long off, u##bits val);
1541 DECLARE_BTRFS_SETGET_BITS(8)
1542 DECLARE_BTRFS_SETGET_BITS(16)
1543 DECLARE_BTRFS_SETGET_BITS(32)
1544 DECLARE_BTRFS_SETGET_BITS(64)
1546 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1547 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1550 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1551 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1553 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1556 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1557 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1559 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1562 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1563 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1565 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1566 type *s, u##bits val) \
1568 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1569 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1572 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1573 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1575 const type *p = page_address(eb->pages[0]) + \
1576 offset_in_page(eb->start); \
1577 return get_unaligned_le##bits(&p->member); \
1579 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1582 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \
1583 put_unaligned_le##bits(val, &p->member); \
1586 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1587 static inline u##bits btrfs_##name(const type *s) \
1589 return get_unaligned_le##bits(&s->member); \
1591 static inline void btrfs_set_##name(type *s, u##bits val) \
1593 put_unaligned_le##bits(val, &s->member); \
1596 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1597 struct btrfs_dev_item *s)
1599 BUILD_BUG_ON(sizeof(u64) !=
1600 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1601 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1604 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1605 struct btrfs_dev_item *s,
1608 BUILD_BUG_ON(sizeof(u64) !=
1609 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1610 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1611 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1615 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1616 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1617 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1618 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1619 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1621 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1622 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1623 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1624 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1625 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1626 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1628 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1629 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1631 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1633 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1635 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1637 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1639 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1640 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1642 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1644 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1646 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1649 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1651 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1654 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1656 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1659 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1660 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1661 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1662 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1663 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1664 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1665 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1666 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1667 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1668 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1669 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1671 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1673 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1676 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1677 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1678 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1680 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1682 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1684 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1686 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1687 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1689 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1691 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1692 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1694 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1697 unsigned long offset = (unsigned long)c;
1698 offset += offsetof(struct btrfs_chunk, stripe);
1699 offset += nr * sizeof(struct btrfs_stripe);
1700 return (struct btrfs_stripe *)offset;
1703 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1705 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1708 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1709 struct btrfs_chunk *c, int nr)
1711 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1714 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1715 struct btrfs_chunk *c, int nr)
1717 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1720 /* struct btrfs_block_group_item */
1721 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1723 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1725 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1726 struct btrfs_block_group_item, chunk_objectid, 64);
1728 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1729 struct btrfs_block_group_item, chunk_objectid, 64);
1730 BTRFS_SETGET_FUNCS(block_group_flags,
1731 struct btrfs_block_group_item, flags, 64);
1732 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1733 struct btrfs_block_group_item, flags, 64);
1735 /* struct btrfs_free_space_info */
1736 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1738 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1740 /* struct btrfs_inode_ref */
1741 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1742 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1744 /* struct btrfs_inode_extref */
1745 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1746 parent_objectid, 64);
1747 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1749 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1751 /* struct btrfs_inode_item */
1752 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1753 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1754 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1755 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1756 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1757 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1758 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1759 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1760 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1761 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1762 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1763 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1764 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1766 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1768 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1770 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1771 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1773 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1775 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1776 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1777 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1778 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1779 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1780 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1781 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1782 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1783 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1784 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1786 /* struct btrfs_dev_extent */
1787 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1789 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1790 chunk_objectid, 64);
1791 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1793 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1794 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1795 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1797 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1799 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1801 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1802 struct btrfs_tree_block_info *item,
1803 struct btrfs_disk_key *key)
1805 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1808 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1809 struct btrfs_tree_block_info *item,
1810 struct btrfs_disk_key *key)
1812 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1815 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1817 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1819 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1821 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1824 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1827 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1829 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1832 static inline u32 btrfs_extent_inline_ref_size(int type)
1834 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1835 type == BTRFS_SHARED_BLOCK_REF_KEY)
1836 return sizeof(struct btrfs_extent_inline_ref);
1837 if (type == BTRFS_SHARED_DATA_REF_KEY)
1838 return sizeof(struct btrfs_shared_data_ref) +
1839 sizeof(struct btrfs_extent_inline_ref);
1840 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1841 return sizeof(struct btrfs_extent_data_ref) +
1842 offsetof(struct btrfs_extent_inline_ref, offset);
1846 /* struct btrfs_node */
1847 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1848 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1849 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1851 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1854 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1857 ptr = offsetof(struct btrfs_node, ptrs) +
1858 sizeof(struct btrfs_key_ptr) * nr;
1859 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1862 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1866 ptr = offsetof(struct btrfs_node, ptrs) +
1867 sizeof(struct btrfs_key_ptr) * nr;
1868 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1871 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1874 ptr = offsetof(struct btrfs_node, ptrs) +
1875 sizeof(struct btrfs_key_ptr) * nr;
1876 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1879 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1883 ptr = offsetof(struct btrfs_node, ptrs) +
1884 sizeof(struct btrfs_key_ptr) * nr;
1885 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1888 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1890 return offsetof(struct btrfs_node, ptrs) +
1891 sizeof(struct btrfs_key_ptr) * nr;
1894 void btrfs_node_key(const struct extent_buffer *eb,
1895 struct btrfs_disk_key *disk_key, int nr);
1897 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1898 struct btrfs_disk_key *disk_key, int nr)
1901 ptr = btrfs_node_key_ptr_offset(nr);
1902 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1903 struct btrfs_key_ptr, key, disk_key);
1906 /* struct btrfs_item */
1907 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1908 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1909 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1910 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1912 static inline unsigned long btrfs_item_nr_offset(int nr)
1914 return offsetof(struct btrfs_leaf, items) +
1915 sizeof(struct btrfs_item) * nr;
1918 static inline struct btrfs_item *btrfs_item_nr(int nr)
1920 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1923 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1924 struct btrfs_item *item)
1926 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1929 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1931 return btrfs_item_end(eb, btrfs_item_nr(nr));
1934 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1936 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1939 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1941 return btrfs_item_size(eb, btrfs_item_nr(nr));
1944 static inline void btrfs_item_key(const struct extent_buffer *eb,
1945 struct btrfs_disk_key *disk_key, int nr)
1947 struct btrfs_item *item = btrfs_item_nr(nr);
1948 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1951 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1952 struct btrfs_disk_key *disk_key, int nr)
1954 struct btrfs_item *item = btrfs_item_nr(nr);
1955 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1958 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1961 * struct btrfs_root_ref
1963 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1964 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1965 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1967 /* struct btrfs_dir_item */
1968 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1969 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1970 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1971 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1972 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1973 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1975 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1977 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1980 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1981 const struct btrfs_dir_item *item,
1982 struct btrfs_disk_key *key)
1984 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1987 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1988 struct btrfs_dir_item *item,
1989 const struct btrfs_disk_key *key)
1991 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1994 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1996 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1998 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
2001 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
2002 const struct btrfs_free_space_header *h,
2003 struct btrfs_disk_key *key)
2005 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2008 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
2009 struct btrfs_free_space_header *h,
2010 const struct btrfs_disk_key *key)
2012 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2015 /* struct btrfs_disk_key */
2016 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2018 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2019 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2021 #ifdef __LITTLE_ENDIAN
2024 * Optimized helpers for little-endian architectures where CPU and on-disk
2025 * structures have the same endianness and we can skip conversions.
2028 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
2029 const struct btrfs_disk_key *disk_key)
2031 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
2034 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
2035 const struct btrfs_key *cpu_key)
2037 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
2040 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2041 struct btrfs_key *cpu_key, int nr)
2043 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2045 btrfs_node_key(eb, disk_key, nr);
2048 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2049 struct btrfs_key *cpu_key, int nr)
2051 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2053 btrfs_item_key(eb, disk_key, nr);
2056 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2057 const struct btrfs_dir_item *item,
2058 struct btrfs_key *cpu_key)
2060 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2062 btrfs_dir_item_key(eb, item, disk_key);
2067 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2068 const struct btrfs_disk_key *disk)
2070 cpu->offset = le64_to_cpu(disk->offset);
2071 cpu->type = disk->type;
2072 cpu->objectid = le64_to_cpu(disk->objectid);
2075 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2076 const struct btrfs_key *cpu)
2078 disk->offset = cpu_to_le64(cpu->offset);
2079 disk->type = cpu->type;
2080 disk->objectid = cpu_to_le64(cpu->objectid);
2083 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2084 struct btrfs_key *key, int nr)
2086 struct btrfs_disk_key disk_key;
2087 btrfs_node_key(eb, &disk_key, nr);
2088 btrfs_disk_key_to_cpu(key, &disk_key);
2091 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2092 struct btrfs_key *key, int nr)
2094 struct btrfs_disk_key disk_key;
2095 btrfs_item_key(eb, &disk_key, nr);
2096 btrfs_disk_key_to_cpu(key, &disk_key);
2099 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2100 const struct btrfs_dir_item *item,
2101 struct btrfs_key *key)
2103 struct btrfs_disk_key disk_key;
2104 btrfs_dir_item_key(eb, item, &disk_key);
2105 btrfs_disk_key_to_cpu(key, &disk_key);
2110 /* struct btrfs_header */
2111 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2112 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2114 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2115 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2116 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2117 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2118 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2120 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2121 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2123 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2125 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2127 return (btrfs_header_flags(eb) & flag) == flag;
2130 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2132 u64 flags = btrfs_header_flags(eb);
2133 btrfs_set_header_flags(eb, flags | flag);
2136 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2138 u64 flags = btrfs_header_flags(eb);
2139 btrfs_set_header_flags(eb, flags & ~flag);
2142 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2144 u64 flags = btrfs_header_flags(eb);
2145 return flags >> BTRFS_BACKREF_REV_SHIFT;
2148 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2151 u64 flags = btrfs_header_flags(eb);
2152 flags &= ~BTRFS_BACKREF_REV_MASK;
2153 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2154 btrfs_set_header_flags(eb, flags);
2157 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2159 return btrfs_header_level(eb) == 0;
2162 /* struct btrfs_root_item */
2163 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2165 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2166 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2167 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2169 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2171 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2172 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
2173 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2174 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2175 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2176 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2177 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2178 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2179 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2181 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2183 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2185 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2187 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2189 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2192 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2194 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2197 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2199 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2202 /* struct btrfs_root_backup */
2203 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2205 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2207 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2208 tree_root_level, 8);
2210 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2212 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2213 chunk_root_gen, 64);
2214 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2215 chunk_root_level, 8);
2217 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2219 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2220 extent_root_gen, 64);
2221 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2222 extent_root_level, 8);
2224 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2226 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2228 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2231 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2233 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2235 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2238 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2240 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2242 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2243 csum_root_level, 8);
2244 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2246 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2248 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2251 /* struct btrfs_balance_item */
2252 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2254 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2255 const struct btrfs_balance_item *bi,
2256 struct btrfs_disk_balance_args *ba)
2258 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2261 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2262 struct btrfs_balance_item *bi,
2263 const struct btrfs_disk_balance_args *ba)
2265 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2268 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2269 const struct btrfs_balance_item *bi,
2270 struct btrfs_disk_balance_args *ba)
2272 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2275 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2276 struct btrfs_balance_item *bi,
2277 const struct btrfs_disk_balance_args *ba)
2279 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2282 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2283 const struct btrfs_balance_item *bi,
2284 struct btrfs_disk_balance_args *ba)
2286 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2289 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2290 struct btrfs_balance_item *bi,
2291 const struct btrfs_disk_balance_args *ba)
2293 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2297 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2298 const struct btrfs_disk_balance_args *disk)
2300 memset(cpu, 0, sizeof(*cpu));
2302 cpu->profiles = le64_to_cpu(disk->profiles);
2303 cpu->usage = le64_to_cpu(disk->usage);
2304 cpu->devid = le64_to_cpu(disk->devid);
2305 cpu->pstart = le64_to_cpu(disk->pstart);
2306 cpu->pend = le64_to_cpu(disk->pend);
2307 cpu->vstart = le64_to_cpu(disk->vstart);
2308 cpu->vend = le64_to_cpu(disk->vend);
2309 cpu->target = le64_to_cpu(disk->target);
2310 cpu->flags = le64_to_cpu(disk->flags);
2311 cpu->limit = le64_to_cpu(disk->limit);
2312 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2313 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2317 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2318 const struct btrfs_balance_args *cpu)
2320 memset(disk, 0, sizeof(*disk));
2322 disk->profiles = cpu_to_le64(cpu->profiles);
2323 disk->usage = cpu_to_le64(cpu->usage);
2324 disk->devid = cpu_to_le64(cpu->devid);
2325 disk->pstart = cpu_to_le64(cpu->pstart);
2326 disk->pend = cpu_to_le64(cpu->pend);
2327 disk->vstart = cpu_to_le64(cpu->vstart);
2328 disk->vend = cpu_to_le64(cpu->vend);
2329 disk->target = cpu_to_le64(cpu->target);
2330 disk->flags = cpu_to_le64(cpu->flags);
2331 disk->limit = cpu_to_le64(cpu->limit);
2332 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2333 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2336 /* struct btrfs_super_block */
2337 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2338 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2339 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2341 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2342 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2343 struct btrfs_super_block, sys_chunk_array_size, 32);
2344 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2345 struct btrfs_super_block, chunk_root_generation, 64);
2346 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2348 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2350 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2351 chunk_root_level, 8);
2352 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2354 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2355 log_root_transid, 64);
2356 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2358 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2360 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2362 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2364 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2366 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2368 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2369 root_dir_objectid, 64);
2370 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2372 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2374 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2375 compat_ro_flags, 64);
2376 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2377 incompat_flags, 64);
2378 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2380 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2381 cache_generation, 64);
2382 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2383 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2384 uuid_tree_generation, 64);
2386 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2387 const char *btrfs_super_csum_name(u16 csum_type);
2388 const char *btrfs_super_csum_driver(u16 csum_type);
2389 size_t __attribute_const__ btrfs_get_num_csums(void);
2393 * The leaf data grows from end-to-front in the node.
2394 * this returns the address of the start of the last item,
2395 * which is the stop of the leaf data stack
2397 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2399 u32 nr = btrfs_header_nritems(leaf);
2402 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2403 return btrfs_item_offset_nr(leaf, nr - 1);
2406 /* struct btrfs_file_extent_item */
2407 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2409 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2410 struct btrfs_file_extent_item, disk_bytenr, 64);
2411 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2412 struct btrfs_file_extent_item, offset, 64);
2413 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2414 struct btrfs_file_extent_item, generation, 64);
2415 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2416 struct btrfs_file_extent_item, num_bytes, 64);
2417 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2418 struct btrfs_file_extent_item, ram_bytes, 64);
2419 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2420 struct btrfs_file_extent_item, disk_num_bytes, 64);
2421 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2422 struct btrfs_file_extent_item, compression, 8);
2424 static inline unsigned long
2425 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2427 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2430 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2432 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2435 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2436 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2438 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2440 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2441 disk_num_bytes, 64);
2442 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2444 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2446 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2448 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2450 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2452 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2453 other_encoding, 16);
2456 * this returns the number of bytes used by the item on disk, minus the
2457 * size of any extent headers. If a file is compressed on disk, this is
2458 * the compressed size
2460 static inline u32 btrfs_file_extent_inline_item_len(
2461 const struct extent_buffer *eb,
2462 struct btrfs_item *e)
2464 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2467 /* btrfs_qgroup_status_item */
2468 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2470 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2472 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2474 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2477 /* btrfs_qgroup_info_item */
2478 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2480 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2481 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2483 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2484 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2487 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2488 struct btrfs_qgroup_info_item, generation, 64);
2489 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2491 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2492 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2493 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2495 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2496 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2498 /* btrfs_qgroup_limit_item */
2499 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2501 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2503 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2505 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2507 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2510 /* btrfs_dev_replace_item */
2511 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2512 struct btrfs_dev_replace_item, src_devid, 64);
2513 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2514 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2516 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2518 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2520 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2522 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2523 num_write_errors, 64);
2524 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2525 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2527 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2529 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2533 struct btrfs_dev_replace_item, src_devid, 64);
2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2535 struct btrfs_dev_replace_item,
2536 cont_reading_from_srcdev_mode, 64);
2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2538 struct btrfs_dev_replace_item, replace_state, 64);
2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2540 struct btrfs_dev_replace_item, time_started, 64);
2541 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2542 struct btrfs_dev_replace_item, time_stopped, 64);
2543 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2544 struct btrfs_dev_replace_item, num_write_errors, 64);
2545 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2546 struct btrfs_dev_replace_item,
2547 num_uncorrectable_read_errors, 64);
2548 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2549 struct btrfs_dev_replace_item, cursor_left, 64);
2550 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2551 struct btrfs_dev_replace_item, cursor_right, 64);
2553 /* helper function to cast into the data area of the leaf. */
2554 #define btrfs_item_ptr(leaf, slot, type) \
2555 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2556 btrfs_item_offset_nr(leaf, slot)))
2558 #define btrfs_item_ptr_offset(leaf, slot) \
2559 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2560 btrfs_item_offset_nr(leaf, slot)))
2562 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2564 return crc32c(crc, address, length);
2567 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2569 put_unaligned_le32(~crc, result);
2572 static inline u64 btrfs_name_hash(const char *name, int len)
2574 return crc32c((u32)~1, name, len);
2578 * Figure the key offset of an extended inode ref
2580 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2583 return (u64) crc32c(parent_objectid, name, len);
2586 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2588 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2593 enum btrfs_inline_ref_type {
2594 BTRFS_REF_TYPE_INVALID,
2595 BTRFS_REF_TYPE_BLOCK,
2596 BTRFS_REF_TYPE_DATA,
2600 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2601 struct btrfs_extent_inline_ref *iref,
2602 enum btrfs_inline_ref_type is_data);
2603 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2606 * Take the number of bytes to be checksummmed and figure out how many leaves
2607 * it would require to store the csums for that many bytes.
2609 static inline u64 btrfs_csum_bytes_to_leaves(
2610 const struct btrfs_fs_info *fs_info, u64 csum_bytes)
2612 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
2614 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
2618 * Use this if we would be adding new items, as we could split nodes as we cow
2621 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2624 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2628 * Doing a truncate or a modification won't result in new nodes or leaves, just
2629 * what we need for COW.
2631 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2634 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2637 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2638 u64 start, u64 num_bytes);
2639 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2640 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2641 unsigned long count);
2642 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2643 struct btrfs_delayed_ref_root *delayed_refs,
2644 struct btrfs_delayed_ref_head *head);
2645 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2646 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2647 struct btrfs_fs_info *fs_info, u64 bytenr,
2648 u64 offset, int metadata, u64 *refs, u64 *flags);
2649 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2651 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2652 u64 bytenr, u64 num_bytes);
2653 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2654 int btrfs_cross_ref_exist(struct btrfs_root *root,
2655 u64 objectid, u64 offset, u64 bytenr, bool strict);
2656 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2657 struct btrfs_root *root,
2658 u64 parent, u64 root_objectid,
2659 const struct btrfs_disk_key *key,
2660 int level, u64 hint,
2662 enum btrfs_lock_nesting nest);
2663 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2664 struct btrfs_root *root,
2665 struct extent_buffer *buf,
2666 u64 parent, int last_ref);
2667 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2668 struct btrfs_root *root, u64 owner,
2669 u64 offset, u64 ram_bytes,
2670 struct btrfs_key *ins);
2671 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2672 u64 root_objectid, u64 owner, u64 offset,
2673 struct btrfs_key *ins);
2674 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2675 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2676 struct btrfs_key *ins, int is_data, int delalloc);
2677 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2678 struct extent_buffer *buf, int full_backref);
2679 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2680 struct extent_buffer *buf, int full_backref);
2681 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2682 struct extent_buffer *eb, u64 flags,
2683 int level, int is_data);
2684 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2686 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2687 u64 start, u64 len, int delalloc);
2688 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2690 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2691 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2692 struct btrfs_ref *generic_ref);
2694 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2697 * Different levels for to flush space when doing space reservations.
2699 * The higher the level, the more methods we try to reclaim space.
2701 enum btrfs_reserve_flush_enum {
2702 /* If we are in the transaction, we can't flush anything.*/
2703 BTRFS_RESERVE_NO_FLUSH,
2707 * - Running delayed inode items
2708 * - Allocating a new chunk
2710 BTRFS_RESERVE_FLUSH_LIMIT,
2714 * - Running delayed inode items
2715 * - Running delayed refs
2716 * - Running delalloc and waiting for ordered extents
2717 * - Allocating a new chunk
2719 BTRFS_RESERVE_FLUSH_EVICT,
2722 * Flush space by above mentioned methods and by:
2723 * - Running delayed iputs
2724 * - Commiting transaction
2726 * Can be interruped by fatal signal.
2728 BTRFS_RESERVE_FLUSH_DATA,
2729 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2730 BTRFS_RESERVE_FLUSH_ALL,
2733 * Pretty much the same as FLUSH_ALL, but can also steal space from
2736 * Can be interruped by fatal signal.
2738 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2741 enum btrfs_flush_state {
2742 FLUSH_DELAYED_ITEMS_NR = 1,
2743 FLUSH_DELAYED_ITEMS = 2,
2744 FLUSH_DELAYED_REFS_NR = 3,
2745 FLUSH_DELAYED_REFS = 4,
2747 FLUSH_DELALLOC_WAIT = 6,
2749 ALLOC_CHUNK_FORCE = 8,
2750 RUN_DELAYED_IPUTS = 9,
2752 FORCE_COMMIT_TRANS = 11,
2755 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2756 struct btrfs_block_rsv *rsv,
2757 int nitems, bool use_global_rsv);
2758 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2759 struct btrfs_block_rsv *rsv);
2760 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2762 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2763 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2764 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2765 u64 start, u64 end);
2766 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2767 u64 num_bytes, u64 *actual_bytes);
2768 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2770 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2771 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2772 struct btrfs_fs_info *fs_info);
2773 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2774 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2775 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2778 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2780 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2781 int btrfs_previous_item(struct btrfs_root *root,
2782 struct btrfs_path *path, u64 min_objectid,
2784 int btrfs_previous_extent_item(struct btrfs_root *root,
2785 struct btrfs_path *path, u64 min_objectid);
2786 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2787 struct btrfs_path *path,
2788 const struct btrfs_key *new_key);
2789 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2790 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2791 struct btrfs_key *key, int lowest_level,
2793 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2794 struct btrfs_path *path,
2796 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2799 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2800 struct btrfs_root *root, struct extent_buffer *buf,
2801 struct extent_buffer *parent, int parent_slot,
2802 struct extent_buffer **cow_ret,
2803 enum btrfs_lock_nesting nest);
2804 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2805 struct btrfs_root *root,
2806 struct extent_buffer *buf,
2807 struct extent_buffer **cow_ret, u64 new_root_objectid);
2808 int btrfs_block_can_be_shared(struct btrfs_root *root,
2809 struct extent_buffer *buf);
2810 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2811 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2812 int btrfs_split_item(struct btrfs_trans_handle *trans,
2813 struct btrfs_root *root,
2814 struct btrfs_path *path,
2815 const struct btrfs_key *new_key,
2816 unsigned long split_offset);
2817 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2818 struct btrfs_root *root,
2819 struct btrfs_path *path,
2820 const struct btrfs_key *new_key);
2821 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2822 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2823 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2824 const struct btrfs_key *key, struct btrfs_path *p,
2825 int ins_len, int cow);
2826 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2827 struct btrfs_path *p, u64 time_seq);
2828 int btrfs_search_slot_for_read(struct btrfs_root *root,
2829 const struct btrfs_key *key,
2830 struct btrfs_path *p, int find_higher,
2832 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2833 struct btrfs_root *root, struct extent_buffer *parent,
2834 int start_slot, u64 *last_ret,
2835 struct btrfs_key *progress);
2836 void btrfs_release_path(struct btrfs_path *p);
2837 struct btrfs_path *btrfs_alloc_path(void);
2838 void btrfs_free_path(struct btrfs_path *p);
2840 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2841 struct btrfs_path *path, int slot, int nr);
2842 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2843 struct btrfs_root *root,
2844 struct btrfs_path *path)
2846 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2849 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2850 const struct btrfs_key *cpu_key, u32 *data_size,
2852 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2853 const struct btrfs_key *key, void *data, u32 data_size);
2854 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2855 struct btrfs_root *root,
2856 struct btrfs_path *path,
2857 const struct btrfs_key *cpu_key, u32 *data_size,
2860 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2861 struct btrfs_root *root,
2862 struct btrfs_path *path,
2863 const struct btrfs_key *key,
2866 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2869 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2870 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2871 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2873 static inline int btrfs_next_old_item(struct btrfs_root *root,
2874 struct btrfs_path *p, u64 time_seq)
2877 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2878 return btrfs_next_old_leaf(root, p, time_seq);
2881 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2883 return btrfs_next_old_item(root, p, 0);
2885 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2886 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2888 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2889 struct btrfs_root *root,
2890 struct extent_buffer *node,
2891 struct extent_buffer *parent);
2892 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2895 * Do it this way so we only ever do one test_bit in the normal case.
2897 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2898 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2906 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2907 * anything except sleeping. This function is used to check the status of
2909 * We check for BTRFS_FS_STATE_RO to avoid races with a concurrent remount,
2910 * since setting and checking for SB_RDONLY in the superblock's flags is not
2913 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2915 return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) ||
2916 btrfs_fs_closing(fs_info);
2919 static inline void btrfs_set_sb_rdonly(struct super_block *sb)
2921 sb->s_flags |= SB_RDONLY;
2922 set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
2925 static inline void btrfs_clear_sb_rdonly(struct super_block *sb)
2927 sb->s_flags &= ~SB_RDONLY;
2928 clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
2931 /* tree mod log functions from ctree.c */
2932 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2933 struct seq_list *elem);
2934 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2935 struct seq_list *elem);
2936 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2939 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2940 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2942 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2943 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2945 int btrfs_del_root(struct btrfs_trans_handle *trans,
2946 const struct btrfs_key *key);
2947 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2948 const struct btrfs_key *key,
2949 struct btrfs_root_item *item);
2950 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2951 struct btrfs_root *root,
2952 struct btrfs_key *key,
2953 struct btrfs_root_item *item);
2954 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2955 struct btrfs_path *path, struct btrfs_root_item *root_item,
2956 struct btrfs_key *root_key);
2957 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2958 void btrfs_set_root_node(struct btrfs_root_item *item,
2959 struct extent_buffer *node);
2960 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2961 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2962 struct btrfs_root *root);
2965 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2967 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2969 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2972 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2973 const char *name, int name_len);
2974 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2975 int name_len, struct btrfs_inode *dir,
2976 struct btrfs_key *location, u8 type, u64 index);
2977 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2978 struct btrfs_root *root,
2979 struct btrfs_path *path, u64 dir,
2980 const char *name, int name_len,
2982 struct btrfs_dir_item *
2983 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2984 struct btrfs_root *root,
2985 struct btrfs_path *path, u64 dir,
2986 u64 objectid, const char *name, int name_len,
2988 struct btrfs_dir_item *
2989 btrfs_search_dir_index_item(struct btrfs_root *root,
2990 struct btrfs_path *path, u64 dirid,
2991 const char *name, int name_len);
2992 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2993 struct btrfs_root *root,
2994 struct btrfs_path *path,
2995 struct btrfs_dir_item *di);
2996 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2997 struct btrfs_root *root,
2998 struct btrfs_path *path, u64 objectid,
2999 const char *name, u16 name_len,
3000 const void *data, u16 data_len);
3001 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
3002 struct btrfs_root *root,
3003 struct btrfs_path *path, u64 dir,
3004 const char *name, u16 name_len,
3006 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
3007 struct btrfs_path *path,
3012 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
3013 struct btrfs_root *root, u64 offset);
3014 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
3015 struct btrfs_root *root, u64 offset);
3016 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3019 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
3020 struct btrfs_root *root,
3021 const char *name, int name_len,
3022 u64 inode_objectid, u64 ref_objectid, u64 index);
3023 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
3024 struct btrfs_root *root,
3025 const char *name, int name_len,
3026 u64 inode_objectid, u64 ref_objectid, u64 *index);
3027 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
3028 struct btrfs_root *root,
3029 struct btrfs_path *path, u64 objectid);
3030 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3031 *root, struct btrfs_path *path,
3032 struct btrfs_key *location, int mod);
3034 struct btrfs_inode_extref *
3035 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3036 struct btrfs_root *root,
3037 struct btrfs_path *path,
3038 const char *name, int name_len,
3039 u64 inode_objectid, u64 ref_objectid, int ins_len,
3042 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
3043 int slot, const char *name,
3045 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
3046 struct extent_buffer *leaf, int slot, u64 ref_objectid,
3047 const char *name, int name_len);
3049 struct btrfs_dio_private;
3050 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3051 struct btrfs_root *root, u64 bytenr, u64 len);
3052 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst);
3053 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3054 struct btrfs_root *root,
3055 u64 objectid, u64 pos,
3056 u64 disk_offset, u64 disk_num_bytes,
3057 u64 num_bytes, u64 offset, u64 ram_bytes,
3058 u8 compression, u8 encryption, u16 other_encoding);
3059 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3060 struct btrfs_root *root,
3061 struct btrfs_path *path, u64 objectid,
3062 u64 bytenr, int mod);
3063 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3064 struct btrfs_root *root,
3065 struct btrfs_ordered_sum *sums);
3066 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
3067 u64 file_start, int contig);
3068 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3069 struct list_head *list, int search_commit);
3070 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3071 const struct btrfs_path *path,
3072 struct btrfs_file_extent_item *fi,
3073 const bool new_inline,
3074 struct extent_map *em);
3075 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
3077 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
3079 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
3080 u64 btrfs_file_extent_end(const struct btrfs_path *path);
3083 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
3084 int mirror_num, unsigned long bio_flags);
3085 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset,
3086 struct page *page, u64 start, u64 end);
3087 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3088 u64 start, u64 len);
3089 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3090 u64 *orig_start, u64 *orig_block_len,
3091 u64 *ram_bytes, bool strict);
3093 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3094 struct btrfs_inode *inode);
3095 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3096 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3097 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3098 struct btrfs_root *root,
3099 struct btrfs_inode *dir, struct btrfs_inode *inode,
3100 const char *name, int name_len);
3101 int btrfs_add_link(struct btrfs_trans_handle *trans,
3102 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3103 const char *name, int name_len, int add_backref, u64 index);
3104 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3105 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
3107 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3108 struct btrfs_root *root,
3109 struct btrfs_inode *inode, u64 new_size,
3112 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3113 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr,
3114 bool in_reclaim_context);
3115 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
3116 unsigned int extra_bits,
3117 struct extent_state **cached_state);
3118 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3119 struct btrfs_root *new_root,
3120 struct btrfs_root *parent_root);
3121 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3123 void btrfs_clear_delalloc_extent(struct inode *inode,
3124 struct extent_state *state, unsigned *bits);
3125 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3126 struct extent_state *other);
3127 void btrfs_split_delalloc_extent(struct inode *inode,
3128 struct extent_state *orig, u64 split);
3129 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3130 unsigned long bio_flags);
3131 bool btrfs_bio_fits_in_ordered_extent(struct page *page, struct bio *bio,
3133 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3134 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3135 int btrfs_readpage(struct file *file, struct page *page);
3136 void btrfs_evict_inode(struct inode *inode);
3137 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3138 struct inode *btrfs_alloc_inode(struct super_block *sb);
3139 void btrfs_destroy_inode(struct inode *inode);
3140 void btrfs_free_inode(struct inode *inode);
3141 int btrfs_drop_inode(struct inode *inode);
3142 int __init btrfs_init_cachep(void);
3143 void __cold btrfs_destroy_cachep(void);
3144 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3145 struct btrfs_root *root, struct btrfs_path *path);
3146 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3147 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3148 struct page *page, size_t pg_offset,
3149 u64 start, u64 end);
3150 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3151 struct btrfs_root *root, struct btrfs_inode *inode);
3152 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3153 struct btrfs_root *root, struct btrfs_inode *inode);
3154 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3155 struct btrfs_inode *inode);
3156 int btrfs_orphan_cleanup(struct btrfs_root *root);
3157 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size);
3158 void btrfs_add_delayed_iput(struct inode *inode);
3159 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3160 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3161 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3162 u64 start, u64 num_bytes, u64 min_size,
3163 loff_t actual_len, u64 *alloc_hint);
3164 int btrfs_prealloc_file_range_trans(struct inode *inode,
3165 struct btrfs_trans_handle *trans, int mode,
3166 u64 start, u64 num_bytes, u64 min_size,
3167 loff_t actual_len, u64 *alloc_hint);
3168 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3169 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3170 struct writeback_control *wbc);
3171 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3172 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3173 u64 end, int uptodate);
3174 extern const struct dentry_operations btrfs_dentry_operations;
3175 extern const struct iomap_ops btrfs_dio_iomap_ops;
3176 extern const struct iomap_dio_ops btrfs_dio_ops;
3178 /* Inode locking type flags, by default the exclusive lock is taken */
3179 #define BTRFS_ILOCK_SHARED (1U << 0)
3180 #define BTRFS_ILOCK_TRY (1U << 1)
3181 #define BTRFS_ILOCK_MMAP (1U << 2)
3183 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags);
3184 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags);
3185 void btrfs_update_inode_bytes(struct btrfs_inode *inode,
3186 const u64 add_bytes,
3187 const u64 del_bytes);
3190 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3191 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3192 int btrfs_ioctl_get_supported_features(void __user *arg);
3193 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3194 int __pure btrfs_is_empty_uuid(u8 *uuid);
3195 int btrfs_defrag_file(struct inode *inode, struct file *file,
3196 struct btrfs_ioctl_defrag_range_args *range,
3197 u64 newer_than, unsigned long max_pages);
3198 void btrfs_get_block_group_info(struct list_head *groups_list,
3199 struct btrfs_ioctl_space_info *space);
3200 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3201 struct btrfs_ioctl_balance_args *bargs);
3202 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3203 enum btrfs_exclusive_operation type);
3204 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3207 int __init btrfs_auto_defrag_init(void);
3208 void __cold btrfs_auto_defrag_exit(void);
3209 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3210 struct btrfs_inode *inode);
3211 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3212 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3213 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3214 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3216 extern const struct file_operations btrfs_file_operations;
3217 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3218 struct btrfs_root *root, struct btrfs_inode *inode,
3219 struct btrfs_drop_extents_args *args);
3220 int btrfs_replace_file_extents(struct btrfs_inode *inode,
3221 struct btrfs_path *path, const u64 start,
3223 struct btrfs_replace_extent_info *extent_info,
3224 struct btrfs_trans_handle **trans_out);
3225 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3226 struct btrfs_inode *inode, u64 start, u64 end);
3227 int btrfs_release_file(struct inode *inode, struct file *file);
3228 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3229 size_t num_pages, loff_t pos, size_t write_bytes,
3230 struct extent_state **cached, bool noreserve);
3231 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3232 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3233 size_t *write_bytes);
3234 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3237 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3238 struct btrfs_root *root);
3241 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3242 unsigned long new_flags);
3243 int btrfs_sync_fs(struct super_block *sb, int wait);
3244 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3245 u64 subvol_objectid);
3247 static inline __printf(2, 3) __cold
3248 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3252 #ifdef CONFIG_PRINTK
3255 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3257 #define btrfs_printk(fs_info, fmt, args...) \
3258 btrfs_no_printk(fs_info, fmt, ##args)
3261 #define btrfs_emerg(fs_info, fmt, args...) \
3262 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3263 #define btrfs_alert(fs_info, fmt, args...) \
3264 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3265 #define btrfs_crit(fs_info, fmt, args...) \
3266 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3267 #define btrfs_err(fs_info, fmt, args...) \
3268 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3269 #define btrfs_warn(fs_info, fmt, args...) \
3270 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3271 #define btrfs_notice(fs_info, fmt, args...) \
3272 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3273 #define btrfs_info(fs_info, fmt, args...) \
3274 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3277 * Wrappers that use printk_in_rcu
3279 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3280 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3281 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3282 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3283 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3284 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3285 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3286 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3287 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3288 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3289 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3290 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3291 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3292 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3295 * Wrappers that use a ratelimited printk_in_rcu
3297 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3298 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3299 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3300 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3301 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3302 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3303 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3304 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3305 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3306 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3307 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3308 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3309 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3310 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3313 * Wrappers that use a ratelimited printk
3315 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3316 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3317 #define btrfs_alert_rl(fs_info, fmt, args...) \
3318 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3319 #define btrfs_crit_rl(fs_info, fmt, args...) \
3320 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3321 #define btrfs_err_rl(fs_info, fmt, args...) \
3322 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3323 #define btrfs_warn_rl(fs_info, fmt, args...) \
3324 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3325 #define btrfs_notice_rl(fs_info, fmt, args...) \
3326 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3327 #define btrfs_info_rl(fs_info, fmt, args...) \
3328 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3330 #if defined(CONFIG_DYNAMIC_DEBUG)
3331 #define btrfs_debug(fs_info, fmt, args...) \
3332 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3333 fs_info, KERN_DEBUG fmt, ##args)
3334 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3335 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3336 fs_info, KERN_DEBUG fmt, ##args)
3337 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3338 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3339 fs_info, KERN_DEBUG fmt, ##args)
3340 #define btrfs_debug_rl(fs_info, fmt, args...) \
3341 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3342 fs_info, KERN_DEBUG fmt, ##args)
3343 #elif defined(DEBUG)
3344 #define btrfs_debug(fs_info, fmt, args...) \
3345 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3346 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3347 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3348 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3349 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3350 #define btrfs_debug_rl(fs_info, fmt, args...) \
3351 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3353 #define btrfs_debug(fs_info, fmt, args...) \
3354 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3355 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3356 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3357 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3358 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3359 #define btrfs_debug_rl(fs_info, fmt, args...) \
3360 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3363 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3366 btrfs_printk(fs_info, fmt, ##args); \
3367 rcu_read_unlock(); \
3370 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3373 btrfs_no_printk(fs_info, fmt, ##args); \
3374 rcu_read_unlock(); \
3377 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3379 static DEFINE_RATELIMIT_STATE(_rs, \
3380 DEFAULT_RATELIMIT_INTERVAL, \
3381 DEFAULT_RATELIMIT_BURST); \
3382 if (__ratelimit(&_rs)) \
3383 btrfs_printk(fs_info, fmt, ##args); \
3386 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3389 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3390 rcu_read_unlock(); \
3393 #ifdef CONFIG_BTRFS_ASSERT
3395 static inline void assertfail(const char *expr, const char *file, int line)
3397 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3401 #define ASSERT(expr) \
3402 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3405 static inline void assertfail(const char *expr, const char* file, int line) { }
3406 #define ASSERT(expr) (void)(expr)
3410 * Get the correct offset inside the page of extent buffer.
3412 * @eb: target extent buffer
3413 * @start: offset inside the extent buffer
3415 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases.
3417 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb,
3418 unsigned long offset)
3421 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned
3422 * to PAGE_SIZE, thus adding it won't cause any difference.
3424 * For sectorsize < PAGE_SIZE, we must only read the data that belongs
3425 * to the eb, thus we have to take the eb->start into consideration.
3427 return offset_in_page(offset + eb->start);
3430 static inline unsigned long get_eb_page_index(unsigned long offset)
3433 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough.
3435 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE,
3436 * and have ensured that all tree blocks are contained in one page,
3437 * thus we always get index == 0.
3439 return offset >> PAGE_SHIFT;
3443 * Use that for functions that are conditionally exported for sanity tests but
3446 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3447 #define EXPORT_FOR_TESTS static
3449 #define EXPORT_FOR_TESTS
3453 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3456 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3461 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3462 unsigned int line, int errno, const char *fmt, ...);
3464 const char * __attribute_const__ btrfs_decode_error(int errno);
3467 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3468 const char *function,
3469 unsigned int line, int errno);
3472 * Call btrfs_abort_transaction as early as possible when an error condition is
3473 * detected, that way the exact line number is reported.
3475 #define btrfs_abort_transaction(trans, errno) \
3477 /* Report first abort since mount */ \
3478 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3479 &((trans)->fs_info->fs_state))) { \
3480 if ((errno) != -EIO && (errno) != -EROFS) { \
3481 WARN(1, KERN_DEBUG \
3482 "BTRFS: Transaction aborted (error %d)\n", \
3485 btrfs_debug((trans)->fs_info, \
3486 "Transaction aborted (error %d)", \
3490 __btrfs_abort_transaction((trans), __func__, \
3491 __LINE__, (errno)); \
3494 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3496 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3497 (errno), fmt, ##args); \
3502 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3503 unsigned int line, int errno, const char *fmt, ...);
3505 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3506 * will panic(). Otherwise we BUG() here.
3508 #define btrfs_panic(fs_info, errno, fmt, args...) \
3510 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3515 /* compatibility and incompatibility defines */
3517 #define btrfs_set_fs_incompat(__fs_info, opt) \
3518 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3521 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3522 u64 flag, const char* name)
3524 struct btrfs_super_block *disk_super;
3527 disk_super = fs_info->super_copy;
3528 features = btrfs_super_incompat_flags(disk_super);
3529 if (!(features & flag)) {
3530 spin_lock(&fs_info->super_lock);
3531 features = btrfs_super_incompat_flags(disk_super);
3532 if (!(features & flag)) {
3534 btrfs_set_super_incompat_flags(disk_super, features);
3536 "setting incompat feature flag for %s (0x%llx)",
3539 spin_unlock(&fs_info->super_lock);
3543 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3544 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3547 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3548 u64 flag, const char* name)
3550 struct btrfs_super_block *disk_super;
3553 disk_super = fs_info->super_copy;
3554 features = btrfs_super_incompat_flags(disk_super);
3555 if (features & flag) {
3556 spin_lock(&fs_info->super_lock);
3557 features = btrfs_super_incompat_flags(disk_super);
3558 if (features & flag) {
3560 btrfs_set_super_incompat_flags(disk_super, features);
3562 "clearing incompat feature flag for %s (0x%llx)",
3565 spin_unlock(&fs_info->super_lock);
3569 #define btrfs_fs_incompat(fs_info, opt) \
3570 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3572 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3574 struct btrfs_super_block *disk_super;
3575 disk_super = fs_info->super_copy;
3576 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3579 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3580 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3583 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3584 u64 flag, const char *name)
3586 struct btrfs_super_block *disk_super;
3589 disk_super = fs_info->super_copy;
3590 features = btrfs_super_compat_ro_flags(disk_super);
3591 if (!(features & flag)) {
3592 spin_lock(&fs_info->super_lock);
3593 features = btrfs_super_compat_ro_flags(disk_super);
3594 if (!(features & flag)) {
3596 btrfs_set_super_compat_ro_flags(disk_super, features);
3598 "setting compat-ro feature flag for %s (0x%llx)",
3601 spin_unlock(&fs_info->super_lock);
3605 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3606 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3609 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3610 u64 flag, const char *name)
3612 struct btrfs_super_block *disk_super;
3615 disk_super = fs_info->super_copy;
3616 features = btrfs_super_compat_ro_flags(disk_super);
3617 if (features & flag) {
3618 spin_lock(&fs_info->super_lock);
3619 features = btrfs_super_compat_ro_flags(disk_super);
3620 if (features & flag) {
3622 btrfs_set_super_compat_ro_flags(disk_super, features);
3624 "clearing compat-ro feature flag for %s (0x%llx)",
3627 spin_unlock(&fs_info->super_lock);
3631 #define btrfs_fs_compat_ro(fs_info, opt) \
3632 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3634 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3636 struct btrfs_super_block *disk_super;
3637 disk_super = fs_info->super_copy;
3638 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3642 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3643 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3644 int btrfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
3645 struct posix_acl *acl, int type);
3646 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3647 struct inode *inode, struct inode *dir);
3649 #define btrfs_get_acl NULL
3650 #define btrfs_set_acl NULL
3651 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3652 struct inode *inode, struct inode *dir)
3659 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3660 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3661 struct btrfs_root *root);
3662 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3663 struct btrfs_root *root);
3664 int btrfs_recover_relocation(struct btrfs_root *root);
3665 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3666 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3667 struct btrfs_root *root, struct extent_buffer *buf,
3668 struct extent_buffer *cow);
3669 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3670 u64 *bytes_to_reserve);
3671 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3672 struct btrfs_pending_snapshot *pending);
3673 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3674 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3676 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3679 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3680 u64 end, struct btrfs_scrub_progress *progress,
3681 int readonly, int is_dev_replace);
3682 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3683 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3684 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3685 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3686 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3687 struct btrfs_scrub_progress *progress);
3688 static inline void btrfs_init_full_stripe_locks_tree(
3689 struct btrfs_full_stripe_locks_tree *locks_root)
3691 locks_root->root = RB_ROOT;
3692 mutex_init(&locks_root->lock);
3696 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3697 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3698 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3700 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3702 btrfs_bio_counter_sub(fs_info, 1);
3706 struct reada_control {
3707 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3708 struct btrfs_key key_start;
3709 struct btrfs_key key_end; /* exclusive */
3712 wait_queue_head_t wait;
3714 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3715 struct btrfs_key *start, struct btrfs_key *end);
3716 int btrfs_reada_wait(void *handle);
3717 void btrfs_reada_detach(void *handle);
3718 int btree_readahead_hook(struct extent_buffer *eb, int err);
3719 void btrfs_reada_remove_dev(struct btrfs_device *dev);
3720 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev);
3722 static inline int is_fstree(u64 rootid)
3724 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3725 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3726 !btrfs_qgroup_level(rootid)))
3731 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3733 return signal_pending(current);
3736 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3738 /* Sanity test specific functions */
3739 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3740 void btrfs_test_destroy_inode(struct inode *inode);
3741 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3743 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3746 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3752 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
3754 return fs_info->zoned != 0;