1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2007 Oracle. All rights reserved.
10 #include <linux/sched/signal.h>
11 #include <linux/highmem.h>
13 #include <linux/rwsem.h>
14 #include <linux/semaphore.h>
15 #include <linux/completion.h>
16 #include <linux/backing-dev.h>
17 #include <linux/wait.h>
18 #include <linux/slab.h>
19 #include <trace/events/btrfs.h>
20 #include <asm/kmap_types.h>
21 #include <asm/unaligned.h>
22 #include <linux/pagemap.h>
23 #include <linux/btrfs.h>
24 #include <linux/btrfs_tree.h>
25 #include <linux/workqueue.h>
26 #include <linux/security.h>
27 #include <linux/sizes.h>
28 #include <linux/dynamic_debug.h>
29 #include <linux/refcount.h>
30 #include <linux/crc32c.h>
31 #include <linux/iomap.h>
32 #include "extent-io-tree.h"
33 #include "extent_io.h"
34 #include "extent_map.h"
35 #include "async-thread.h"
36 #include "block-rsv.h"
39 struct btrfs_trans_handle;
40 struct btrfs_transaction;
41 struct btrfs_pending_snapshot;
42 struct btrfs_delayed_ref_root;
43 struct btrfs_space_info;
44 struct btrfs_block_group;
45 extern struct kmem_cache *btrfs_trans_handle_cachep;
46 extern struct kmem_cache *btrfs_bit_radix_cachep;
47 extern struct kmem_cache *btrfs_path_cachep;
48 extern struct kmem_cache *btrfs_free_space_cachep;
49 extern struct kmem_cache *btrfs_free_space_bitmap_cachep;
50 struct btrfs_ordered_sum;
53 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
56 * Maximum number of mirrors that can be available for all profiles counting
57 * the target device of dev-replace as one. During an active device replace
58 * procedure, the target device of the copy operation is a mirror for the
59 * filesystem data as well that can be used to read data in order to repair
60 * read errors on other disks.
62 * Current value is derived from RAID1C4 with 4 copies.
64 #define BTRFS_MAX_MIRRORS (4 + 1)
66 #define BTRFS_MAX_LEVEL 8
68 #define BTRFS_OLDEST_GENERATION 0ULL
71 * the max metadata block size. This limit is somewhat artificial,
72 * but the memmove costs go through the roof for larger blocks.
74 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
77 * we can actually store much bigger names, but lets not confuse the rest
80 #define BTRFS_NAME_LEN 255
83 * Theoretical limit is larger, but we keep this down to a sane
84 * value. That should limit greatly the possibility of collisions on
87 #define BTRFS_LINK_MAX 65535U
89 #define BTRFS_EMPTY_DIR_SIZE 0
91 /* ioprio of readahead is set to idle */
92 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
94 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M
97 * Use large batch size to reduce overhead of metadata updates. On the reader
98 * side, we only read it when we are close to ENOSPC and the read overhead is
99 * mostly related to the number of CPUs, so it is OK to use arbitrary large
102 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M
104 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
107 * Deltas are an effective way to populate global statistics. Give macro names
108 * to make it clear what we're doing. An example is discard_extents in
109 * btrfs_free_space_ctl.
111 #define BTRFS_STAT_NR_ENTRIES 2
112 #define BTRFS_STAT_CURR 0
113 #define BTRFS_STAT_PREV 1
116 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
118 static inline u32 count_max_extents(u64 size)
120 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
123 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
125 BUG_ON(num_stripes == 0);
126 return sizeof(struct btrfs_chunk) +
127 sizeof(struct btrfs_stripe) * (num_stripes - 1);
131 * Runtime (in-memory) states of filesystem
134 /* Global indicator of serious filesystem errors */
135 BTRFS_FS_STATE_ERROR,
137 * Filesystem is being remounted, allow to skip some operations, like
140 BTRFS_FS_STATE_REMOUNTING,
141 /* Track if a transaction abort has been reported on this filesystem */
142 BTRFS_FS_STATE_TRANS_ABORTED,
144 * Bio operations should be blocked on this filesystem because a source
145 * or target device is being destroyed as part of a device replace
147 BTRFS_FS_STATE_DEV_REPLACING,
148 /* The btrfs_fs_info created for self-tests */
149 BTRFS_FS_STATE_DUMMY_FS_INFO,
152 #define BTRFS_BACKREF_REV_MAX 256
153 #define BTRFS_BACKREF_REV_SHIFT 56
154 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
155 BTRFS_BACKREF_REV_SHIFT)
157 #define BTRFS_OLD_BACKREF_REV 0
158 #define BTRFS_MIXED_BACKREF_REV 1
161 * every tree block (leaf or node) starts with this header.
163 struct btrfs_header {
164 /* these first four must match the super block */
165 u8 csum[BTRFS_CSUM_SIZE];
166 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
167 __le64 bytenr; /* which block this node is supposed to live in */
170 /* allowed to be different from the super from here on down */
171 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
176 } __attribute__ ((__packed__));
179 * this is a very generous portion of the super block, giving us
180 * room to translate 14 chunks with 3 stripes each.
182 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
185 * just in case we somehow lose the roots and are not able to mount,
186 * we store an array of the roots from previous transactions
189 #define BTRFS_NUM_BACKUP_ROOTS 4
190 struct btrfs_root_backup {
192 __le64 tree_root_gen;
195 __le64 chunk_root_gen;
198 __le64 extent_root_gen;
207 __le64 csum_root_gen;
217 u8 extent_root_level;
221 /* future and to align */
223 } __attribute__ ((__packed__));
226 * the super block basically lists the main trees of the FS
227 * it currently lacks any block count etc etc
229 struct btrfs_super_block {
230 /* the first 4 fields must match struct btrfs_header */
231 u8 csum[BTRFS_CSUM_SIZE];
232 /* FS specific UUID, visible to user */
233 u8 fsid[BTRFS_FSID_SIZE];
234 __le64 bytenr; /* this block number */
237 /* allowed to be different from the btrfs_header from here own down */
244 /* this will help find the new super based on the log root */
245 __le64 log_root_transid;
248 __le64 root_dir_objectid;
252 __le32 __unused_leafsize;
254 __le32 sys_chunk_array_size;
255 __le64 chunk_root_generation;
257 __le64 compat_ro_flags;
258 __le64 incompat_flags;
263 struct btrfs_dev_item dev_item;
265 char label[BTRFS_LABEL_SIZE];
267 __le64 cache_generation;
268 __le64 uuid_tree_generation;
270 /* the UUID written into btree blocks */
271 u8 metadata_uuid[BTRFS_FSID_SIZE];
273 /* future expansion */
275 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
276 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
277 } __attribute__ ((__packed__));
280 * Compat flags that we support. If any incompat flags are set other than the
281 * ones specified below then we will fail to mount
283 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
284 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL
285 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL
287 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
288 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
289 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL
292 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL
294 #define BTRFS_FEATURE_INCOMPAT_SUPP \
295 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
296 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
297 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
298 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
299 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
300 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
301 BTRFS_FEATURE_INCOMPAT_RAID56 | \
302 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
303 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
304 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
305 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
306 BTRFS_FEATURE_INCOMPAT_RAID1C34)
308 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \
309 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
310 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL
313 * A leaf is full of items. offset and size tell us where to find
314 * the item in the leaf (relative to the start of the data area)
317 struct btrfs_disk_key key;
320 } __attribute__ ((__packed__));
323 * leaves have an item area and a data area:
324 * [item0, item1....itemN] [free space] [dataN...data1, data0]
326 * The data is separate from the items to get the keys closer together
330 struct btrfs_header header;
331 struct btrfs_item items[];
332 } __attribute__ ((__packed__));
335 * all non-leaf blocks are nodes, they hold only keys and pointers to
338 struct btrfs_key_ptr {
339 struct btrfs_disk_key key;
342 } __attribute__ ((__packed__));
345 struct btrfs_header header;
346 struct btrfs_key_ptr ptrs[];
347 } __attribute__ ((__packed__));
350 * btrfs_paths remember the path taken from the root down to the leaf.
351 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
352 * to any other levels that are present.
354 * The slots array records the index of the item or block pointer
355 * used while walking the tree.
357 enum { READA_NONE, READA_BACK, READA_FORWARD };
359 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
360 int slots[BTRFS_MAX_LEVEL];
361 /* if there is real range locking, this locks field will change */
362 u8 locks[BTRFS_MAX_LEVEL];
364 /* keep some upper locks as we walk down */
368 * set by btrfs_split_item, tells search_slot to keep all locks
369 * and to force calls to keep space in the nodes
371 unsigned int search_for_split:1;
372 unsigned int keep_locks:1;
373 unsigned int skip_locking:1;
374 unsigned int search_commit_root:1;
375 unsigned int need_commit_sem:1;
376 unsigned int skip_release_on_error:1;
378 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
379 sizeof(struct btrfs_item))
380 struct btrfs_dev_replace {
381 u64 replace_state; /* see #define above */
382 time64_t time_started; /* seconds since 1-Jan-1970 */
383 time64_t time_stopped; /* seconds since 1-Jan-1970 */
384 atomic64_t num_write_errors;
385 atomic64_t num_uncorrectable_read_errors;
388 u64 committed_cursor_left;
389 u64 cursor_left_last_write_of_item;
392 u64 cont_reading_from_srcdev_mode; /* see #define above */
395 int item_needs_writeback;
396 struct btrfs_device *srcdev;
397 struct btrfs_device *tgtdev;
399 struct mutex lock_finishing_cancel_unmount;
400 struct rw_semaphore rwsem;
402 struct btrfs_scrub_progress scrub_progress;
404 struct percpu_counter bio_counter;
405 wait_queue_head_t replace_wait;
409 * free clusters are used to claim free space in relatively large chunks,
410 * allowing us to do less seeky writes. They are used for all metadata
411 * allocations. In ssd_spread mode they are also used for data allocations.
413 struct btrfs_free_cluster {
415 spinlock_t refill_lock;
418 /* largest extent in this cluster */
421 /* first extent starting offset */
424 /* We did a full search and couldn't create a cluster */
427 struct btrfs_block_group *block_group;
429 * when a cluster is allocated from a block group, we put the
430 * cluster onto a list in the block group so that it can
431 * be freed before the block group is freed.
433 struct list_head block_group_list;
436 enum btrfs_caching_type {
440 BTRFS_CACHE_FINISHED,
445 * Tree to record all locked full stripes of a RAID5/6 block group
447 struct btrfs_full_stripe_locks_tree {
452 /* Discard control. */
454 * Async discard uses multiple lists to differentiate the discard filter
455 * parameters. Index 0 is for completely free block groups where we need to
456 * ensure the entire block group is trimmed without being lossy. Indices
457 * afterwards represent monotonically decreasing discard filter sizes to
458 * prioritize what should be discarded next.
460 #define BTRFS_NR_DISCARD_LISTS 3
461 #define BTRFS_DISCARD_INDEX_UNUSED 0
462 #define BTRFS_DISCARD_INDEX_START 1
464 struct btrfs_discard_ctl {
465 struct workqueue_struct *discard_workers;
466 struct delayed_work work;
468 struct btrfs_block_group *block_group;
469 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS];
471 u64 prev_discard_time;
472 atomic_t discardable_extents;
473 atomic64_t discardable_bytes;
474 u64 max_discard_size;
478 u64 discard_extent_bytes;
479 u64 discard_bitmap_bytes;
480 atomic64_t discard_bytes_saved;
483 /* delayed seq elem */
485 struct list_head list;
489 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 }
491 #define SEQ_LAST ((u64)-1)
493 enum btrfs_orphan_cleanup_state {
494 ORPHAN_CLEANUP_STARTED = 1,
495 ORPHAN_CLEANUP_DONE = 2,
498 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
501 struct reloc_control;
503 struct btrfs_fs_devices;
504 struct btrfs_balance_control;
505 struct btrfs_delayed_root;
508 * Block group or device which contains an active swapfile. Used for preventing
509 * unsafe operations while a swapfile is active.
511 * These are sorted on (ptr, inode) (note that a block group or device can
512 * contain more than one swapfile). We compare the pointer values because we
513 * don't actually care what the object is, we just need a quick check whether
514 * the object exists in the rbtree.
516 struct btrfs_swapfile_pin {
521 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
522 * points to a struct btrfs_device.
527 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
531 BTRFS_FS_CLOSING_START,
532 BTRFS_FS_CLOSING_DONE,
533 BTRFS_FS_LOG_RECOVERING,
535 BTRFS_FS_QUOTA_ENABLED,
536 BTRFS_FS_UPDATE_UUID_TREE_GEN,
537 BTRFS_FS_CREATING_FREE_SPACE_TREE,
541 BTRFS_FS_QUOTA_OVERRIDE,
542 /* Used to record internally whether fs has been frozen */
545 * Indicate that balance has been set up from the ioctl and is in the
546 * main phase. The fs_info::balance_ctl is initialized.
547 * Set and cleared while holding fs_info::balance_mutex.
549 BTRFS_FS_BALANCE_RUNNING,
551 /* Indicate that the cleaner thread is awake and doing something. */
552 BTRFS_FS_CLEANER_RUNNING,
555 * The checksumming has an optimized version and is considered fast,
556 * so we don't need to offload checksums to workqueues.
558 BTRFS_FS_CSUM_IMPL_FAST,
560 /* Indicate that the discard workqueue can service discards. */
561 BTRFS_FS_DISCARD_RUNNING,
563 /* Indicate that we need to cleanup space cache v1 */
564 BTRFS_FS_CLEANUP_SPACE_CACHE_V1,
568 * Exclusive operations (device replace, resize, device add/remove, balance)
570 enum btrfs_exclusive_operation {
572 BTRFS_EXCLOP_BALANCE,
573 BTRFS_EXCLOP_DEV_ADD,
574 BTRFS_EXCLOP_DEV_REMOVE,
575 BTRFS_EXCLOP_DEV_REPLACE,
577 BTRFS_EXCLOP_SWAP_ACTIVATE,
580 struct btrfs_fs_info {
581 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
583 struct btrfs_root *extent_root;
584 struct btrfs_root *tree_root;
585 struct btrfs_root *chunk_root;
586 struct btrfs_root *dev_root;
587 struct btrfs_root *fs_root;
588 struct btrfs_root *csum_root;
589 struct btrfs_root *quota_root;
590 struct btrfs_root *uuid_root;
591 struct btrfs_root *free_space_root;
592 struct btrfs_root *data_reloc_root;
594 /* the log root tree is a directory of all the other log roots */
595 struct btrfs_root *log_root_tree;
597 spinlock_t fs_roots_radix_lock;
598 struct radix_tree_root fs_roots_radix;
600 /* block group cache stuff */
601 spinlock_t block_group_cache_lock;
602 u64 first_logical_byte;
603 struct rb_root block_group_cache_tree;
605 /* keep track of unallocated space */
606 atomic64_t free_chunk_space;
608 /* Track ranges which are used by log trees blocks/logged data extents */
609 struct extent_io_tree excluded_extents;
611 /* logical->physical extent mapping */
612 struct extent_map_tree mapping_tree;
615 * block reservation for extent, checksum, root tree and
616 * delayed dir index item
618 struct btrfs_block_rsv global_block_rsv;
619 /* block reservation for metadata operations */
620 struct btrfs_block_rsv trans_block_rsv;
621 /* block reservation for chunk tree */
622 struct btrfs_block_rsv chunk_block_rsv;
623 /* block reservation for delayed operations */
624 struct btrfs_block_rsv delayed_block_rsv;
625 /* block reservation for delayed refs */
626 struct btrfs_block_rsv delayed_refs_rsv;
628 struct btrfs_block_rsv empty_block_rsv;
631 u64 last_trans_committed;
632 u64 avg_delayed_ref_runtime;
635 * this is updated to the current trans every time a full commit
636 * is required instead of the faster short fsync log commits
638 u64 last_trans_log_full_commit;
639 unsigned long mount_opt;
641 * Track requests for actions that need to be done during transaction
642 * commit (like for some mount options).
644 unsigned long pending_changes;
645 unsigned long compress_type:4;
646 unsigned int compress_level;
649 * It is a suggestive number, the read side is safe even it gets a
650 * wrong number because we will write out the data into a regular
651 * extent. The write side(mount/remount) is under ->s_umount lock,
652 * so it is also safe.
656 struct btrfs_transaction *running_transaction;
657 wait_queue_head_t transaction_throttle;
658 wait_queue_head_t transaction_wait;
659 wait_queue_head_t transaction_blocked_wait;
660 wait_queue_head_t async_submit_wait;
663 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
664 * when they are updated.
666 * Because we do not clear the flags for ever, so we needn't use
667 * the lock on the read side.
669 * We also needn't use the lock when we mount the fs, because
670 * there is no other task which will update the flag.
672 spinlock_t super_lock;
673 struct btrfs_super_block *super_copy;
674 struct btrfs_super_block *super_for_commit;
675 struct super_block *sb;
676 struct inode *btree_inode;
677 struct mutex tree_log_mutex;
678 struct mutex transaction_kthread_mutex;
679 struct mutex cleaner_mutex;
680 struct mutex chunk_mutex;
683 * this is taken to make sure we don't set block groups ro after
684 * the free space cache has been allocated on them
686 struct mutex ro_block_group_mutex;
688 /* this is used during read/modify/write to make sure
689 * no two ios are trying to mod the same stripe at the same
692 struct btrfs_stripe_hash_table *stripe_hash_table;
695 * this protects the ordered operations list only while we are
696 * processing all of the entries on it. This way we make
697 * sure the commit code doesn't find the list temporarily empty
698 * because another function happens to be doing non-waiting preflush
699 * before jumping into the main commit.
701 struct mutex ordered_operations_mutex;
703 struct rw_semaphore commit_root_sem;
705 struct rw_semaphore cleanup_work_sem;
707 struct rw_semaphore subvol_sem;
709 spinlock_t trans_lock;
711 * the reloc mutex goes with the trans lock, it is taken
712 * during commit to protect us from the relocation code
714 struct mutex reloc_mutex;
716 struct list_head trans_list;
717 struct list_head dead_roots;
718 struct list_head caching_block_groups;
720 spinlock_t delayed_iput_lock;
721 struct list_head delayed_iputs;
722 atomic_t nr_delayed_iputs;
723 wait_queue_head_t delayed_iputs_wait;
725 atomic64_t tree_mod_seq;
727 /* this protects tree_mod_log and tree_mod_seq_list */
728 rwlock_t tree_mod_log_lock;
729 struct rb_root tree_mod_log;
730 struct list_head tree_mod_seq_list;
732 atomic_t async_delalloc_pages;
735 * this is used to protect the following list -- ordered_roots.
737 spinlock_t ordered_root_lock;
740 * all fs/file tree roots in which there are data=ordered extents
741 * pending writeback are added into this list.
743 * these can span multiple transactions and basically include
744 * every dirty data page that isn't from nodatacow
746 struct list_head ordered_roots;
748 struct mutex delalloc_root_mutex;
749 spinlock_t delalloc_root_lock;
750 /* all fs/file tree roots that have delalloc inodes. */
751 struct list_head delalloc_roots;
754 * there is a pool of worker threads for checksumming during writes
755 * and a pool for checksumming after reads. This is because readers
756 * can run with FS locks held, and the writers may be waiting for
757 * those locks. We don't want ordering in the pending list to cause
758 * deadlocks, and so the two are serviced separately.
760 * A third pool does submit_bio to avoid deadlocking with the other
763 struct btrfs_workqueue *workers;
764 struct btrfs_workqueue *delalloc_workers;
765 struct btrfs_workqueue *flush_workers;
766 struct btrfs_workqueue *endio_workers;
767 struct btrfs_workqueue *endio_meta_workers;
768 struct btrfs_workqueue *endio_raid56_workers;
769 struct btrfs_workqueue *rmw_workers;
770 struct btrfs_workqueue *endio_meta_write_workers;
771 struct btrfs_workqueue *endio_write_workers;
772 struct btrfs_workqueue *endio_freespace_worker;
773 struct btrfs_workqueue *caching_workers;
774 struct btrfs_workqueue *readahead_workers;
777 * fixup workers take dirty pages that didn't properly go through
778 * the cow mechanism and make them safe to write. It happens
779 * for the sys_munmap function call path
781 struct btrfs_workqueue *fixup_workers;
782 struct btrfs_workqueue *delayed_workers;
784 struct task_struct *transaction_kthread;
785 struct task_struct *cleaner_kthread;
786 u32 thread_pool_size;
788 struct kobject *space_info_kobj;
789 struct kobject *qgroups_kobj;
793 /* used to keep from writing metadata until there is a nice batch */
794 struct percpu_counter dirty_metadata_bytes;
795 struct percpu_counter delalloc_bytes;
796 struct percpu_counter dio_bytes;
797 s32 dirty_metadata_batch;
800 struct list_head dirty_cowonly_roots;
802 struct btrfs_fs_devices *fs_devices;
805 * The space_info list is effectively read only after initial
806 * setup. It is populated at mount time and cleaned up after
807 * all block groups are removed. RCU is used to protect it.
809 struct list_head space_info;
811 struct btrfs_space_info *data_sinfo;
813 struct reloc_control *reloc_ctl;
815 /* data_alloc_cluster is only used in ssd_spread mode */
816 struct btrfs_free_cluster data_alloc_cluster;
818 /* all metadata allocations go through this cluster */
819 struct btrfs_free_cluster meta_alloc_cluster;
821 /* auto defrag inodes go here */
822 spinlock_t defrag_inodes_lock;
823 struct rb_root defrag_inodes;
824 atomic_t defrag_running;
826 /* Used to protect avail_{data, metadata, system}_alloc_bits */
827 seqlock_t profiles_lock;
829 * these three are in extended format (availability of single
830 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
831 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
833 u64 avail_data_alloc_bits;
834 u64 avail_metadata_alloc_bits;
835 u64 avail_system_alloc_bits;
837 /* restriper state */
838 spinlock_t balance_lock;
839 struct mutex balance_mutex;
840 atomic_t balance_pause_req;
841 atomic_t balance_cancel_req;
842 struct btrfs_balance_control *balance_ctl;
843 wait_queue_head_t balance_wait_q;
845 u32 data_chunk_allocations;
850 /* private scrub information */
851 struct mutex scrub_lock;
852 atomic_t scrubs_running;
853 atomic_t scrub_pause_req;
854 atomic_t scrubs_paused;
855 atomic_t scrub_cancel_req;
856 wait_queue_head_t scrub_pause_wait;
858 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
861 refcount_t scrub_workers_refcnt;
862 struct btrfs_workqueue *scrub_workers;
863 struct btrfs_workqueue *scrub_wr_completion_workers;
864 struct btrfs_workqueue *scrub_parity_workers;
866 struct btrfs_discard_ctl discard_ctl;
868 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
869 u32 check_integrity_print_mask;
871 /* is qgroup tracking in a consistent state? */
874 /* holds configuration and tracking. Protected by qgroup_lock */
875 struct rb_root qgroup_tree;
876 spinlock_t qgroup_lock;
879 * used to avoid frequently calling ulist_alloc()/ulist_free()
880 * when doing qgroup accounting, it must be protected by qgroup_lock.
882 struct ulist *qgroup_ulist;
885 * Protect user change for quota operations. If a transaction is needed,
886 * it must be started before locking this lock.
888 struct mutex qgroup_ioctl_lock;
890 /* list of dirty qgroups to be written at next commit */
891 struct list_head dirty_qgroups;
893 /* used by qgroup for an efficient tree traversal */
896 /* qgroup rescan items */
897 struct mutex qgroup_rescan_lock; /* protects the progress item */
898 struct btrfs_key qgroup_rescan_progress;
899 struct btrfs_workqueue *qgroup_rescan_workers;
900 struct completion qgroup_rescan_completion;
901 struct btrfs_work qgroup_rescan_work;
902 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
904 /* filesystem state */
905 unsigned long fs_state;
907 struct btrfs_delayed_root *delayed_root;
910 spinlock_t reada_lock;
911 struct radix_tree_root reada_tree;
913 /* readahead works cnt */
914 atomic_t reada_works_cnt;
916 /* Extent buffer radix tree */
917 spinlock_t buffer_lock;
918 /* Entries are eb->start / sectorsize */
919 struct radix_tree_root buffer_radix;
921 /* next backup root to be overwritten */
922 int backup_root_index;
924 /* device replace state */
925 struct btrfs_dev_replace dev_replace;
927 struct semaphore uuid_tree_rescan_sem;
929 /* Used to reclaim the metadata space in the background. */
930 struct work_struct async_reclaim_work;
931 struct work_struct async_data_reclaim_work;
933 spinlock_t unused_bgs_lock;
934 struct list_head unused_bgs;
935 struct mutex unused_bg_unpin_mutex;
936 struct mutex delete_unused_bgs_mutex;
938 /* Cached block sizes */
941 /* ilog2 of sectorsize, use to avoid 64bit division */
947 /* Block groups and devices containing active swapfiles. */
948 spinlock_t swapfile_pins_lock;
949 struct rb_root swapfile_pins;
951 struct crypto_shash *csum_shash;
954 * Number of send operations in progress.
955 * Updated while holding fs_info::balance_mutex.
957 int send_in_progress;
959 /* Type of exclusive operation running */
960 unsigned long exclusive_operation;
963 * Zone size > 0 when in ZONED mode, otherwise it's used for a check
964 * if the mode is enabled
971 /* Max size to emit ZONE_APPEND write command */
972 u64 max_zone_append_size;
974 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
975 spinlock_t ref_verify_lock;
976 struct rb_root block_tree;
979 #ifdef CONFIG_BTRFS_DEBUG
980 struct kobject *debug_kobj;
981 struct kobject *discard_debug_kobj;
982 struct list_head allocated_roots;
984 spinlock_t eb_leak_lock;
985 struct list_head allocated_ebs;
989 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
991 return sb->s_fs_info;
995 * The state of btrfs root
999 * btrfs_record_root_in_trans is a multi-step process, and it can race
1000 * with the balancing code. But the race is very small, and only the
1001 * first time the root is added to each transaction. So IN_TRANS_SETUP
1002 * is used to tell us when more checks are required
1004 BTRFS_ROOT_IN_TRANS_SETUP,
1007 * Set if tree blocks of this root can be shared by other roots.
1008 * Only subvolume trees and their reloc trees have this bit set.
1009 * Conflicts with TRACK_DIRTY bit.
1011 * This affects two things:
1013 * - How balance works
1014 * For shareable roots, we need to use reloc tree and do path
1015 * replacement for balance, and need various pre/post hooks for
1016 * snapshot creation to handle them.
1018 * While for non-shareable trees, we just simply do a tree search
1021 * - How dirty roots are tracked
1022 * For shareable roots, btrfs_record_root_in_trans() is needed to
1023 * track them, while non-subvolume roots have TRACK_DIRTY bit, they
1024 * don't need to set this manually.
1026 BTRFS_ROOT_SHAREABLE,
1027 BTRFS_ROOT_TRACK_DIRTY,
1028 BTRFS_ROOT_IN_RADIX,
1029 BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
1030 BTRFS_ROOT_DEFRAG_RUNNING,
1031 BTRFS_ROOT_FORCE_COW,
1032 BTRFS_ROOT_MULTI_LOG_TASKS,
1034 BTRFS_ROOT_DELETING,
1037 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
1039 * Set for the subvolume tree owning the reloc tree.
1041 BTRFS_ROOT_DEAD_RELOC_TREE,
1042 /* Mark dead root stored on device whose cleanup needs to be resumed */
1043 BTRFS_ROOT_DEAD_TREE,
1044 /* The root has a log tree. Used for subvolume roots and the tree root. */
1045 BTRFS_ROOT_HAS_LOG_TREE,
1046 /* Qgroup flushing is in progress */
1047 BTRFS_ROOT_QGROUP_FLUSHING,
1051 * Record swapped tree blocks of a subvolume tree for delayed subtree trace
1052 * code. For detail check comment in fs/btrfs/qgroup.c.
1054 struct btrfs_qgroup_swapped_blocks {
1056 /* RM_EMPTY_ROOT() of above blocks[] */
1058 struct rb_root blocks[BTRFS_MAX_LEVEL];
1062 * in ram representation of the tree. extent_root is used for all allocations
1063 * and for the extent tree extent_root root.
1066 struct extent_buffer *node;
1068 struct extent_buffer *commit_root;
1069 struct btrfs_root *log_root;
1070 struct btrfs_root *reloc_root;
1072 unsigned long state;
1073 struct btrfs_root_item root_item;
1074 struct btrfs_key root_key;
1075 struct btrfs_fs_info *fs_info;
1076 struct extent_io_tree dirty_log_pages;
1078 struct mutex objectid_mutex;
1080 spinlock_t accounting_lock;
1081 struct btrfs_block_rsv *block_rsv;
1083 struct mutex log_mutex;
1084 wait_queue_head_t log_writer_wait;
1085 wait_queue_head_t log_commit_wait[2];
1086 struct list_head log_ctxs[2];
1087 /* Used only for log trees of subvolumes, not for the log root tree */
1088 atomic_t log_writers;
1089 atomic_t log_commit[2];
1090 /* Used only for log trees of subvolumes, not for the log root tree */
1093 /* No matter the commit succeeds or not*/
1094 int log_transid_committed;
1095 /* Just be updated when the commit succeeds. */
1096 int last_log_commit;
1097 pid_t log_start_pid;
1103 u64 highest_objectid;
1105 struct btrfs_key defrag_progress;
1106 struct btrfs_key defrag_max;
1108 /* The dirty list is only used by non-shareable roots */
1109 struct list_head dirty_list;
1111 struct list_head root_list;
1113 spinlock_t log_extents_lock[2];
1114 struct list_head logged_list[2];
1116 int orphan_cleanup_state;
1118 spinlock_t inode_lock;
1119 /* red-black tree that keeps track of in-memory inodes */
1120 struct rb_root inode_tree;
1123 * radix tree that keeps track of delayed nodes of every inode,
1124 * protected by inode_lock
1126 struct radix_tree_root delayed_nodes_tree;
1128 * right now this just gets used so that a root has its own devid
1129 * for stat. It may be used for more later
1133 spinlock_t root_item_lock;
1136 struct mutex delalloc_mutex;
1137 spinlock_t delalloc_lock;
1139 * all of the inodes that have delalloc bytes. It is possible for
1140 * this list to be empty even when there is still dirty data=ordered
1141 * extents waiting to finish IO.
1143 struct list_head delalloc_inodes;
1144 struct list_head delalloc_root;
1145 u64 nr_delalloc_inodes;
1147 struct mutex ordered_extent_mutex;
1149 * this is used by the balancing code to wait for all the pending
1152 spinlock_t ordered_extent_lock;
1155 * all of the data=ordered extents pending writeback
1156 * these can span multiple transactions and basically include
1157 * every dirty data page that isn't from nodatacow
1159 struct list_head ordered_extents;
1160 struct list_head ordered_root;
1161 u64 nr_ordered_extents;
1164 * Not empty if this subvolume root has gone through tree block swap
1167 * Will be used by reloc_control::dirty_subvol_roots.
1169 struct list_head reloc_dirty_list;
1172 * Number of currently running SEND ioctls to prevent
1173 * manipulation with the read-only status via SUBVOL_SETFLAGS
1175 int send_in_progress;
1177 * Number of currently running deduplication operations that have a
1178 * destination inode belonging to this root. Protected by the lock
1181 int dedupe_in_progress;
1182 /* For exclusion of snapshot creation and nocow writes */
1183 struct btrfs_drew_lock snapshot_lock;
1185 atomic_t snapshot_force_cow;
1187 /* For qgroup metadata reserved space */
1188 spinlock_t qgroup_meta_rsv_lock;
1189 u64 qgroup_meta_rsv_pertrans;
1190 u64 qgroup_meta_rsv_prealloc;
1191 wait_queue_head_t qgroup_flush_wait;
1193 /* Number of active swapfiles */
1194 atomic_t nr_swapfiles;
1196 /* Record pairs of swapped blocks for qgroup */
1197 struct btrfs_qgroup_swapped_blocks swapped_blocks;
1199 /* Used only by log trees, when logging csum items */
1200 struct extent_io_tree log_csum_range;
1202 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
1206 #ifdef CONFIG_BTRFS_DEBUG
1207 struct list_head leak_list;
1212 * Structure that conveys information about an extent that is going to replace
1213 * all the extents in a file range.
1215 struct btrfs_replace_extent_info {
1221 /* Pointer to a file extent item of type regular or prealloc. */
1224 * Set to true when attempting to replace a file range with a new extent
1225 * described by this structure, set to false when attempting to clone an
1226 * existing extent into a file range.
1229 /* Meaningful only if is_new_extent is true. */
1230 int qgroup_reserved;
1232 * Meaningful only if is_new_extent is true.
1233 * Used to track how many extent items we have already inserted in a
1234 * subvolume tree that refer to the extent described by this structure,
1235 * so that we know when to create a new delayed ref or update an existing
1241 /* Arguments for btrfs_drop_extents() */
1242 struct btrfs_drop_extents_args {
1243 /* Input parameters */
1246 * If NULL, btrfs_drop_extents() will allocate and free its own path.
1247 * If 'replace_extent' is true, this must not be NULL. Also the path
1248 * is always released except if 'replace_extent' is true and
1249 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case
1250 * the path is kept locked.
1252 struct btrfs_path *path;
1253 /* Start offset of the range to drop extents from */
1255 /* End (exclusive, last byte + 1) of the range to drop extents from */
1257 /* If true drop all the extent maps in the range */
1260 * If true it means we want to insert a new extent after dropping all
1261 * the extents in the range. If this is true, the 'extent_item_size'
1262 * parameter must be set as well and the 'extent_inserted' field will
1263 * be set to true by btrfs_drop_extents() if it could insert the new
1265 * Note: when this is set to true the path must not be NULL.
1267 bool replace_extent;
1269 * Used if 'replace_extent' is true. Size of the file extent item to
1270 * insert after dropping all existing extents in the range
1272 u32 extent_item_size;
1274 /* Output parameters */
1277 * Set to the minimum between the input parameter 'end' and the end
1278 * (exclusive, last byte + 1) of the last dropped extent. This is always
1279 * set even if btrfs_drop_extents() returns an error.
1283 * The number of allocated bytes found in the range. This can be smaller
1284 * than the range's length when there are holes in the range.
1288 * Only set if 'replace_extent' is true. Set to true if we were able
1289 * to insert a replacement extent after dropping all extents in the
1290 * range, otherwise set to false by btrfs_drop_extents().
1291 * Also, if btrfs_drop_extents() has set this to true it means it
1292 * returned with the path locked, otherwise if it has set this to
1293 * false it has returned with the path released.
1295 bool extent_inserted;
1298 struct btrfs_file_private {
1303 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
1306 return info->nodesize - sizeof(struct btrfs_header);
1309 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
1311 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1313 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1316 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1318 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1321 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1322 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1323 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1325 return BTRFS_MAX_ITEM_SIZE(info) -
1326 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1329 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1331 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1335 * Flags for mount options.
1337 * Note: don't forget to add new options to btrfs_show_options()
1339 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1340 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1341 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1342 #define BTRFS_MOUNT_SSD (1 << 3)
1343 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1344 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1345 #define BTRFS_MOUNT_NOTREELOG (1 << 6)
1346 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
1347 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
1348 #define BTRFS_MOUNT_NOSSD (1 << 9)
1349 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10)
1350 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
1351 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
1352 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
1353 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1354 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
1355 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
1356 /* bit 17 is free */
1357 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
1358 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
1359 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
1360 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
1361 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
1362 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
1363 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
1364 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
1365 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
1366 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
1367 #define BTRFS_MOUNT_REF_VERIFY (1 << 28)
1368 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29)
1369 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30)
1370 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31)
1372 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
1373 #define BTRFS_DEFAULT_MAX_INLINE (2048)
1375 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1376 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1377 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
1378 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \
1381 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \
1383 if (!btrfs_test_opt(fs_info, opt)) \
1384 btrfs_info(fs_info, fmt, ##args); \
1385 btrfs_set_opt(fs_info->mount_opt, opt); \
1388 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \
1390 if (btrfs_test_opt(fs_info, opt)) \
1391 btrfs_info(fs_info, fmt, ##args); \
1392 btrfs_clear_opt(fs_info->mount_opt, opt); \
1396 * Requests for changes that need to be done during transaction commit.
1398 * Internal mount options that are used for special handling of the real
1399 * mount options (eg. cannot be set during remount and have to be set during
1400 * transaction commit)
1403 #define BTRFS_PENDING_COMMIT (0)
1405 #define btrfs_test_pending(info, opt) \
1406 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1407 #define btrfs_set_pending(info, opt) \
1408 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1409 #define btrfs_clear_pending(info, opt) \
1410 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
1413 * Helpers for setting pending mount option changes.
1415 * Expects corresponding macros
1416 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
1418 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \
1420 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1421 btrfs_info((info), fmt, ##args); \
1422 btrfs_set_pending((info), SET_##opt); \
1423 btrfs_clear_pending((info), CLEAR_##opt); \
1427 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \
1429 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \
1430 btrfs_info((info), fmt, ##args); \
1431 btrfs_set_pending((info), CLEAR_##opt); \
1432 btrfs_clear_pending((info), SET_##opt); \
1439 #define BTRFS_INODE_NODATASUM (1 << 0)
1440 #define BTRFS_INODE_NODATACOW (1 << 1)
1441 #define BTRFS_INODE_READONLY (1 << 2)
1442 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1443 #define BTRFS_INODE_PREALLOC (1 << 4)
1444 #define BTRFS_INODE_SYNC (1 << 5)
1445 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1446 #define BTRFS_INODE_APPEND (1 << 7)
1447 #define BTRFS_INODE_NODUMP (1 << 8)
1448 #define BTRFS_INODE_NOATIME (1 << 9)
1449 #define BTRFS_INODE_DIRSYNC (1 << 10)
1450 #define BTRFS_INODE_COMPRESS (1 << 11)
1452 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
1454 #define BTRFS_INODE_FLAG_MASK \
1455 (BTRFS_INODE_NODATASUM | \
1456 BTRFS_INODE_NODATACOW | \
1457 BTRFS_INODE_READONLY | \
1458 BTRFS_INODE_NOCOMPRESS | \
1459 BTRFS_INODE_PREALLOC | \
1460 BTRFS_INODE_SYNC | \
1461 BTRFS_INODE_IMMUTABLE | \
1462 BTRFS_INODE_APPEND | \
1463 BTRFS_INODE_NODUMP | \
1464 BTRFS_INODE_NOATIME | \
1465 BTRFS_INODE_DIRSYNC | \
1466 BTRFS_INODE_COMPRESS | \
1467 BTRFS_INODE_ROOT_ITEM_INIT)
1469 struct btrfs_map_token {
1470 struct extent_buffer *eb;
1472 unsigned long offset;
1475 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
1476 ((bytes) >> (fs_info)->sectorsize_bits)
1478 static inline void btrfs_init_map_token(struct btrfs_map_token *token,
1479 struct extent_buffer *eb)
1482 token->kaddr = page_address(eb->pages[0]);
1486 /* some macros to generate set/get functions for the struct fields. This
1487 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1490 #define le8_to_cpu(v) (v)
1491 #define cpu_to_le8(v) (v)
1494 static inline u8 get_unaligned_le8(const void *p)
1499 static inline void put_unaligned_le8(u8 val, void *p)
1504 #define read_eb_member(eb, ptr, type, member, result) (\
1505 read_extent_buffer(eb, (char *)(result), \
1506 ((unsigned long)(ptr)) + \
1507 offsetof(type, member), \
1508 sizeof(((type *)0)->member)))
1510 #define write_eb_member(eb, ptr, type, member, result) (\
1511 write_extent_buffer(eb, (char *)(result), \
1512 ((unsigned long)(ptr)) + \
1513 offsetof(type, member), \
1514 sizeof(((type *)0)->member)))
1516 #define DECLARE_BTRFS_SETGET_BITS(bits) \
1517 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
1518 const void *ptr, unsigned long off); \
1519 void btrfs_set_token_##bits(struct btrfs_map_token *token, \
1520 const void *ptr, unsigned long off, \
1522 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
1523 const void *ptr, unsigned long off); \
1524 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
1525 unsigned long off, u##bits val);
1527 DECLARE_BTRFS_SETGET_BITS(8)
1528 DECLARE_BTRFS_SETGET_BITS(16)
1529 DECLARE_BTRFS_SETGET_BITS(32)
1530 DECLARE_BTRFS_SETGET_BITS(64)
1532 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1533 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1536 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1537 return btrfs_get_##bits(eb, s, offsetof(type, member)); \
1539 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
1542 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1543 btrfs_set_##bits(eb, s, offsetof(type, member), val); \
1545 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
1548 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1549 return btrfs_get_token_##bits(token, s, offsetof(type, member));\
1551 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
1552 type *s, u##bits val) \
1554 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \
1555 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
1558 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1559 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1561 const type *p = page_address(eb->pages[0]); \
1562 return get_unaligned_le##bits(&p->member); \
1564 static inline void btrfs_set_##name(const struct extent_buffer *eb, \
1567 type *p = page_address(eb->pages[0]); \
1568 put_unaligned_le##bits(val, &p->member); \
1571 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1572 static inline u##bits btrfs_##name(const type *s) \
1574 return get_unaligned_le##bits(&s->member); \
1576 static inline void btrfs_set_##name(type *s, u##bits val) \
1578 put_unaligned_le##bits(val, &s->member); \
1581 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
1582 struct btrfs_dev_item *s)
1584 BUILD_BUG_ON(sizeof(u64) !=
1585 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1586 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item,
1589 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
1590 struct btrfs_dev_item *s,
1593 BUILD_BUG_ON(sizeof(u64) !=
1594 sizeof(((struct btrfs_dev_item *)0))->total_bytes);
1595 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
1596 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
1600 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1601 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1602 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1603 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1604 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1606 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1607 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1608 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1609 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1610 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1611 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1613 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1614 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1616 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1618 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1620 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1622 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1624 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1625 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1627 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1629 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1631 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1634 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
1636 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
1639 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
1641 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
1644 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1645 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1646 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1647 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1648 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1649 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1650 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1651 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1652 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1653 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1654 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1656 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1658 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1661 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1662 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1665 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1671 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1672 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1676 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1677 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1679 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1682 unsigned long offset = (unsigned long)c;
1683 offset += offsetof(struct btrfs_chunk, stripe);
1684 offset += nr * sizeof(struct btrfs_stripe);
1685 return (struct btrfs_stripe *)offset;
1688 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1690 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1693 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
1694 struct btrfs_chunk *c, int nr)
1696 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1699 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
1700 struct btrfs_chunk *c, int nr)
1702 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1705 /* struct btrfs_block_group_item */
1706 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
1708 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
1710 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
1711 struct btrfs_block_group_item, chunk_objectid, 64);
1713 BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
1714 struct btrfs_block_group_item, chunk_objectid, 64);
1715 BTRFS_SETGET_FUNCS(block_group_flags,
1716 struct btrfs_block_group_item, flags, 64);
1717 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
1718 struct btrfs_block_group_item, flags, 64);
1720 /* struct btrfs_free_space_info */
1721 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1723 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1725 /* struct btrfs_inode_ref */
1726 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1727 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1729 /* struct btrfs_inode_extref */
1730 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1731 parent_objectid, 64);
1732 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1734 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1736 /* struct btrfs_inode_item */
1737 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1738 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1739 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1740 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1741 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1742 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1743 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1744 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1745 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1746 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1747 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1748 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
1761 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
1762 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
1763 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
1764 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
1765 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
1766 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1767 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1768 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
1769 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
1771 /* struct btrfs_dev_extent */
1772 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1774 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1775 chunk_objectid, 64);
1776 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1778 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1779 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1780 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1782 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1784 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1786 static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
1787 struct btrfs_tree_block_info *item,
1788 struct btrfs_disk_key *key)
1790 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1793 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
1794 struct btrfs_tree_block_info *item,
1795 struct btrfs_disk_key *key)
1797 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1800 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1802 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1804 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1806 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1809 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1812 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1814 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1817 static inline u32 btrfs_extent_inline_ref_size(int type)
1819 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1820 type == BTRFS_SHARED_BLOCK_REF_KEY)
1821 return sizeof(struct btrfs_extent_inline_ref);
1822 if (type == BTRFS_SHARED_DATA_REF_KEY)
1823 return sizeof(struct btrfs_shared_data_ref) +
1824 sizeof(struct btrfs_extent_inline_ref);
1825 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1826 return sizeof(struct btrfs_extent_data_ref) +
1827 offsetof(struct btrfs_extent_inline_ref, offset);
1831 /* struct btrfs_node */
1832 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1833 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1834 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
1836 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
1839 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
1842 ptr = offsetof(struct btrfs_node, ptrs) +
1843 sizeof(struct btrfs_key_ptr) * nr;
1844 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1847 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
1851 ptr = offsetof(struct btrfs_node, ptrs) +
1852 sizeof(struct btrfs_key_ptr) * nr;
1853 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1856 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
1859 ptr = offsetof(struct btrfs_node, ptrs) +
1860 sizeof(struct btrfs_key_ptr) * nr;
1861 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1864 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
1868 ptr = offsetof(struct btrfs_node, ptrs) +
1869 sizeof(struct btrfs_key_ptr) * nr;
1870 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1873 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1875 return offsetof(struct btrfs_node, ptrs) +
1876 sizeof(struct btrfs_key_ptr) * nr;
1879 void btrfs_node_key(const struct extent_buffer *eb,
1880 struct btrfs_disk_key *disk_key, int nr);
1882 static inline void btrfs_set_node_key(const struct extent_buffer *eb,
1883 struct btrfs_disk_key *disk_key, int nr)
1886 ptr = btrfs_node_key_ptr_offset(nr);
1887 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1888 struct btrfs_key_ptr, key, disk_key);
1891 /* struct btrfs_item */
1892 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1893 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1894 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
1895 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
1897 static inline unsigned long btrfs_item_nr_offset(int nr)
1899 return offsetof(struct btrfs_leaf, items) +
1900 sizeof(struct btrfs_item) * nr;
1903 static inline struct btrfs_item *btrfs_item_nr(int nr)
1905 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1908 static inline u32 btrfs_item_end(const struct extent_buffer *eb,
1909 struct btrfs_item *item)
1911 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1914 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
1916 return btrfs_item_end(eb, btrfs_item_nr(nr));
1919 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1921 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1924 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
1926 return btrfs_item_size(eb, btrfs_item_nr(nr));
1929 static inline void btrfs_item_key(const struct extent_buffer *eb,
1930 struct btrfs_disk_key *disk_key, int nr)
1932 struct btrfs_item *item = btrfs_item_nr(nr);
1933 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1936 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1937 struct btrfs_disk_key *disk_key, int nr)
1939 struct btrfs_item *item = btrfs_item_nr(nr);
1940 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1943 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1946 * struct btrfs_root_ref
1948 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1949 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1950 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1952 /* struct btrfs_dir_item */
1953 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1954 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1955 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1956 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1957 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1958 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
1960 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
1962 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
1965 static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
1966 const struct btrfs_dir_item *item,
1967 struct btrfs_disk_key *key)
1969 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1972 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1973 struct btrfs_dir_item *item,
1974 const struct btrfs_disk_key *key)
1976 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1979 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1981 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1983 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1986 static inline void btrfs_free_space_key(const struct extent_buffer *eb,
1987 const struct btrfs_free_space_header *h,
1988 struct btrfs_disk_key *key)
1990 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1993 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1994 struct btrfs_free_space_header *h,
1995 const struct btrfs_disk_key *key)
1997 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
2000 /* struct btrfs_disk_key */
2001 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
2003 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
2004 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
2006 #ifdef __LITTLE_ENDIAN
2009 * Optimized helpers for little-endian architectures where CPU and on-disk
2010 * structures have the same endianness and we can skip conversions.
2013 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
2014 const struct btrfs_disk_key *disk_key)
2016 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
2019 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
2020 const struct btrfs_key *cpu_key)
2022 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
2025 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2026 struct btrfs_key *cpu_key, int nr)
2028 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2030 btrfs_node_key(eb, disk_key, nr);
2033 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2034 struct btrfs_key *cpu_key, int nr)
2036 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2038 btrfs_item_key(eb, disk_key, nr);
2041 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2042 const struct btrfs_dir_item *item,
2043 struct btrfs_key *cpu_key)
2045 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
2047 btrfs_dir_item_key(eb, item, disk_key);
2052 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
2053 const struct btrfs_disk_key *disk)
2055 cpu->offset = le64_to_cpu(disk->offset);
2056 cpu->type = disk->type;
2057 cpu->objectid = le64_to_cpu(disk->objectid);
2060 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
2061 const struct btrfs_key *cpu)
2063 disk->offset = cpu_to_le64(cpu->offset);
2064 disk->type = cpu->type;
2065 disk->objectid = cpu_to_le64(cpu->objectid);
2068 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
2069 struct btrfs_key *key, int nr)
2071 struct btrfs_disk_key disk_key;
2072 btrfs_node_key(eb, &disk_key, nr);
2073 btrfs_disk_key_to_cpu(key, &disk_key);
2076 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
2077 struct btrfs_key *key, int nr)
2079 struct btrfs_disk_key disk_key;
2080 btrfs_item_key(eb, &disk_key, nr);
2081 btrfs_disk_key_to_cpu(key, &disk_key);
2084 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
2085 const struct btrfs_dir_item *item,
2086 struct btrfs_key *key)
2088 struct btrfs_disk_key disk_key;
2089 btrfs_dir_item_key(eb, item, &disk_key);
2090 btrfs_disk_key_to_cpu(key, &disk_key);
2095 /* struct btrfs_header */
2096 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2097 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2099 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2100 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2101 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2102 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2103 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2105 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2106 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
2108 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2110 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
2112 return (btrfs_header_flags(eb) & flag) == flag;
2115 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2117 u64 flags = btrfs_header_flags(eb);
2118 btrfs_set_header_flags(eb, flags | flag);
2121 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2123 u64 flags = btrfs_header_flags(eb);
2124 btrfs_set_header_flags(eb, flags & ~flag);
2127 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
2129 u64 flags = btrfs_header_flags(eb);
2130 return flags >> BTRFS_BACKREF_REV_SHIFT;
2133 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2136 u64 flags = btrfs_header_flags(eb);
2137 flags &= ~BTRFS_BACKREF_REV_MASK;
2138 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2139 btrfs_set_header_flags(eb, flags);
2142 static inline int btrfs_is_leaf(const struct extent_buffer *eb)
2144 return btrfs_header_level(eb) == 0;
2147 /* struct btrfs_root_item */
2148 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2150 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2151 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2152 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2154 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2156 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2157 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
2158 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2159 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2160 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2161 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2162 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2163 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2164 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2166 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2168 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2170 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2172 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2174 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2177 static inline bool btrfs_root_readonly(const struct btrfs_root *root)
2179 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
2182 static inline bool btrfs_root_dead(const struct btrfs_root *root)
2184 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
2187 /* struct btrfs_root_backup */
2188 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2190 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2192 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2193 tree_root_level, 8);
2195 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2197 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2198 chunk_root_gen, 64);
2199 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2200 chunk_root_level, 8);
2202 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2204 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2205 extent_root_gen, 64);
2206 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2207 extent_root_level, 8);
2209 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2211 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2213 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2216 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2218 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2220 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2223 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2225 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2227 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2228 csum_root_level, 8);
2229 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2231 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2233 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2236 /* struct btrfs_balance_item */
2237 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2239 static inline void btrfs_balance_data(const struct extent_buffer *eb,
2240 const struct btrfs_balance_item *bi,
2241 struct btrfs_disk_balance_args *ba)
2243 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2246 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
2247 struct btrfs_balance_item *bi,
2248 const struct btrfs_disk_balance_args *ba)
2250 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
2253 static inline void btrfs_balance_meta(const struct extent_buffer *eb,
2254 const struct btrfs_balance_item *bi,
2255 struct btrfs_disk_balance_args *ba)
2257 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2260 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
2261 struct btrfs_balance_item *bi,
2262 const struct btrfs_disk_balance_args *ba)
2264 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
2267 static inline void btrfs_balance_sys(const struct extent_buffer *eb,
2268 const struct btrfs_balance_item *bi,
2269 struct btrfs_disk_balance_args *ba)
2271 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2274 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
2275 struct btrfs_balance_item *bi,
2276 const struct btrfs_disk_balance_args *ba)
2278 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
2282 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
2283 const struct btrfs_disk_balance_args *disk)
2285 memset(cpu, 0, sizeof(*cpu));
2287 cpu->profiles = le64_to_cpu(disk->profiles);
2288 cpu->usage = le64_to_cpu(disk->usage);
2289 cpu->devid = le64_to_cpu(disk->devid);
2290 cpu->pstart = le64_to_cpu(disk->pstart);
2291 cpu->pend = le64_to_cpu(disk->pend);
2292 cpu->vstart = le64_to_cpu(disk->vstart);
2293 cpu->vend = le64_to_cpu(disk->vend);
2294 cpu->target = le64_to_cpu(disk->target);
2295 cpu->flags = le64_to_cpu(disk->flags);
2296 cpu->limit = le64_to_cpu(disk->limit);
2297 cpu->stripes_min = le32_to_cpu(disk->stripes_min);
2298 cpu->stripes_max = le32_to_cpu(disk->stripes_max);
2302 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
2303 const struct btrfs_balance_args *cpu)
2305 memset(disk, 0, sizeof(*disk));
2307 disk->profiles = cpu_to_le64(cpu->profiles);
2308 disk->usage = cpu_to_le64(cpu->usage);
2309 disk->devid = cpu_to_le64(cpu->devid);
2310 disk->pstart = cpu_to_le64(cpu->pstart);
2311 disk->pend = cpu_to_le64(cpu->pend);
2312 disk->vstart = cpu_to_le64(cpu->vstart);
2313 disk->vend = cpu_to_le64(cpu->vend);
2314 disk->target = cpu_to_le64(cpu->target);
2315 disk->flags = cpu_to_le64(cpu->flags);
2316 disk->limit = cpu_to_le64(cpu->limit);
2317 disk->stripes_min = cpu_to_le32(cpu->stripes_min);
2318 disk->stripes_max = cpu_to_le32(cpu->stripes_max);
2321 /* struct btrfs_super_block */
2322 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2323 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2324 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2326 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2327 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2328 struct btrfs_super_block, sys_chunk_array_size, 32);
2329 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2330 struct btrfs_super_block, chunk_root_generation, 64);
2331 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2333 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2335 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2336 chunk_root_level, 8);
2337 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2339 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2340 log_root_transid, 64);
2341 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2343 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2345 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2347 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2349 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2351 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2353 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2354 root_dir_objectid, 64);
2355 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2357 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2359 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2360 compat_ro_flags, 64);
2361 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2362 incompat_flags, 64);
2363 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2365 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2366 cache_generation, 64);
2367 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2368 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2369 uuid_tree_generation, 64);
2371 int btrfs_super_csum_size(const struct btrfs_super_block *s);
2372 const char *btrfs_super_csum_name(u16 csum_type);
2373 const char *btrfs_super_csum_driver(u16 csum_type);
2374 size_t __attribute_const__ btrfs_get_num_csums(void);
2378 * The leaf data grows from end-to-front in the node.
2379 * this returns the address of the start of the last item,
2380 * which is the stop of the leaf data stack
2382 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
2384 u32 nr = btrfs_header_nritems(leaf);
2387 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
2388 return btrfs_item_offset_nr(leaf, nr - 1);
2391 /* struct btrfs_file_extent_item */
2392 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
2394 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
2395 struct btrfs_file_extent_item, disk_bytenr, 64);
2396 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
2397 struct btrfs_file_extent_item, offset, 64);
2398 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
2399 struct btrfs_file_extent_item, generation, 64);
2400 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
2401 struct btrfs_file_extent_item, num_bytes, 64);
2402 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
2403 struct btrfs_file_extent_item, ram_bytes, 64);
2404 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
2405 struct btrfs_file_extent_item, disk_num_bytes, 64);
2406 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
2407 struct btrfs_file_extent_item, compression, 8);
2409 static inline unsigned long
2410 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
2412 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
2415 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2417 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
2420 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2421 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2423 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2425 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2426 disk_num_bytes, 64);
2427 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2429 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2431 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2433 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2435 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2437 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2438 other_encoding, 16);
2441 * this returns the number of bytes used by the item on disk, minus the
2442 * size of any extent headers. If a file is compressed on disk, this is
2443 * the compressed size
2445 static inline u32 btrfs_file_extent_inline_item_len(
2446 const struct extent_buffer *eb,
2447 struct btrfs_item *e)
2449 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
2452 /* btrfs_qgroup_status_item */
2453 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2455 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2457 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2459 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2462 /* btrfs_qgroup_info_item */
2463 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2465 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
2466 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
2468 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
2469 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
2472 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2473 struct btrfs_qgroup_info_item, generation, 64);
2474 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
2476 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
2477 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
2478 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
2480 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
2481 struct btrfs_qgroup_info_item, excl_cmpr, 64);
2483 /* btrfs_qgroup_limit_item */
2484 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2486 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
2488 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
2490 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
2492 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
2495 /* btrfs_dev_replace_item */
2496 BTRFS_SETGET_FUNCS(dev_replace_src_devid,
2497 struct btrfs_dev_replace_item, src_devid, 64);
2498 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
2499 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
2501 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
2503 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
2505 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
2507 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
2508 num_write_errors, 64);
2509 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
2510 struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
2512 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
2514 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
2517 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
2518 struct btrfs_dev_replace_item, src_devid, 64);
2519 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
2520 struct btrfs_dev_replace_item,
2521 cont_reading_from_srcdev_mode, 64);
2522 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
2523 struct btrfs_dev_replace_item, replace_state, 64);
2524 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
2525 struct btrfs_dev_replace_item, time_started, 64);
2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
2527 struct btrfs_dev_replace_item, time_stopped, 64);
2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
2529 struct btrfs_dev_replace_item, num_write_errors, 64);
2530 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
2531 struct btrfs_dev_replace_item,
2532 num_uncorrectable_read_errors, 64);
2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
2534 struct btrfs_dev_replace_item, cursor_left, 64);
2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
2536 struct btrfs_dev_replace_item, cursor_right, 64);
2538 /* helper function to cast into the data area of the leaf. */
2539 #define btrfs_item_ptr(leaf, slot, type) \
2540 ((type *)(BTRFS_LEAF_DATA_OFFSET + \
2541 btrfs_item_offset_nr(leaf, slot)))
2543 #define btrfs_item_ptr_offset(leaf, slot) \
2544 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
2545 btrfs_item_offset_nr(leaf, slot)))
2547 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length)
2549 return crc32c(crc, address, length);
2552 static inline void btrfs_crc32c_final(u32 crc, u8 *result)
2554 put_unaligned_le32(~crc, result);
2557 static inline u64 btrfs_name_hash(const char *name, int len)
2559 return crc32c((u32)~1, name, len);
2563 * Figure the key offset of an extended inode ref
2565 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
2568 return (u64) crc32c(parent_objectid, name, len);
2571 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
2573 return mapping_gfp_constraint(mapping, ~__GFP_FS);
2578 enum btrfs_inline_ref_type {
2579 BTRFS_REF_TYPE_INVALID,
2580 BTRFS_REF_TYPE_BLOCK,
2581 BTRFS_REF_TYPE_DATA,
2585 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
2586 struct btrfs_extent_inline_ref *iref,
2587 enum btrfs_inline_ref_type is_data);
2588 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2591 * Take the number of bytes to be checksummmed and figure out how many leaves
2592 * it would require to store the csums for that many bytes.
2594 static inline u64 btrfs_csum_bytes_to_leaves(
2595 const struct btrfs_fs_info *fs_info, u64 csum_bytes)
2597 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;
2599 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);
2603 * Use this if we would be adding new items, as we could split nodes as we cow
2606 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info,
2609 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
2613 * Doing a truncate or a modification won't result in new nodes or leaves, just
2614 * what we need for COW.
2616 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info,
2619 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
2622 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info,
2623 u64 start, u64 num_bytes);
2624 void btrfs_free_excluded_extents(struct btrfs_block_group *cache);
2625 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
2626 unsigned long count);
2627 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
2628 struct btrfs_delayed_ref_root *delayed_refs,
2629 struct btrfs_delayed_ref_head *head);
2630 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
2631 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2632 struct btrfs_fs_info *fs_info, u64 bytenr,
2633 u64 offset, int metadata, u64 *refs, u64 *flags);
2634 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
2636 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
2637 u64 bytenr, u64 num_bytes);
2638 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
2639 int btrfs_cross_ref_exist(struct btrfs_root *root,
2640 u64 objectid, u64 offset, u64 bytenr, bool strict);
2641 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
2642 struct btrfs_root *root,
2643 u64 parent, u64 root_objectid,
2644 const struct btrfs_disk_key *key,
2645 int level, u64 hint,
2647 enum btrfs_lock_nesting nest);
2648 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2649 struct btrfs_root *root,
2650 struct extent_buffer *buf,
2651 u64 parent, int last_ref);
2652 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
2653 struct btrfs_root *root, u64 owner,
2654 u64 offset, u64 ram_bytes,
2655 struct btrfs_key *ins);
2656 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
2657 u64 root_objectid, u64 owner, u64 offset,
2658 struct btrfs_key *ins);
2659 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
2660 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
2661 struct btrfs_key *ins, int is_data, int delalloc);
2662 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2663 struct extent_buffer *buf, int full_backref);
2664 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2665 struct extent_buffer *buf, int full_backref);
2666 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
2667 struct extent_buffer *eb, u64 flags,
2668 int level, int is_data);
2669 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
2671 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
2672 u64 start, u64 len, int delalloc);
2673 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start,
2675 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
2676 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2677 struct btrfs_ref *generic_ref);
2679 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
2680 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2683 * Different levels for to flush space when doing space reservations.
2685 * The higher the level, the more methods we try to reclaim space.
2687 enum btrfs_reserve_flush_enum {
2688 /* If we are in the transaction, we can't flush anything.*/
2689 BTRFS_RESERVE_NO_FLUSH,
2693 * - Running delayed inode items
2694 * - Allocating a new chunk
2696 BTRFS_RESERVE_FLUSH_LIMIT,
2700 * - Running delayed inode items
2701 * - Running delayed refs
2702 * - Running delalloc and waiting for ordered extents
2703 * - Allocating a new chunk
2705 BTRFS_RESERVE_FLUSH_EVICT,
2708 * Flush space by above mentioned methods and by:
2709 * - Running delayed iputs
2710 * - Commiting transaction
2712 * Can be interruped by fatal signal.
2714 BTRFS_RESERVE_FLUSH_DATA,
2715 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE,
2716 BTRFS_RESERVE_FLUSH_ALL,
2719 * Pretty much the same as FLUSH_ALL, but can also steal space from
2722 * Can be interruped by fatal signal.
2724 BTRFS_RESERVE_FLUSH_ALL_STEAL,
2727 enum btrfs_flush_state {
2728 FLUSH_DELAYED_ITEMS_NR = 1,
2729 FLUSH_DELAYED_ITEMS = 2,
2730 FLUSH_DELAYED_REFS_NR = 3,
2731 FLUSH_DELAYED_REFS = 4,
2733 FLUSH_DELALLOC_WAIT = 6,
2735 ALLOC_CHUNK_FORCE = 8,
2736 RUN_DELAYED_IPUTS = 9,
2740 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
2741 struct btrfs_block_rsv *rsv,
2742 int nitems, bool use_global_rsv);
2743 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
2744 struct btrfs_block_rsv *rsv);
2745 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes);
2747 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes);
2748 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
2749 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
2750 u64 start, u64 end);
2751 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
2752 u64 num_bytes, u64 *actual_bytes);
2753 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);
2755 int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
2756 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
2757 struct btrfs_fs_info *fs_info);
2758 int btrfs_start_write_no_snapshotting(struct btrfs_root *root);
2759 void btrfs_end_write_no_snapshotting(struct btrfs_root *root);
2760 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
2763 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key,
2765 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2);
2766 int btrfs_previous_item(struct btrfs_root *root,
2767 struct btrfs_path *path, u64 min_objectid,
2769 int btrfs_previous_extent_item(struct btrfs_root *root,
2770 struct btrfs_path *path, u64 min_objectid);
2771 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
2772 struct btrfs_path *path,
2773 const struct btrfs_key *new_key);
2774 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
2775 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2776 struct btrfs_key *key, int lowest_level,
2778 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
2779 struct btrfs_path *path,
2781 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent,
2784 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2785 struct btrfs_root *root, struct extent_buffer *buf,
2786 struct extent_buffer *parent, int parent_slot,
2787 struct extent_buffer **cow_ret,
2788 enum btrfs_lock_nesting nest);
2789 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2790 struct btrfs_root *root,
2791 struct extent_buffer *buf,
2792 struct extent_buffer **cow_ret, u64 new_root_objectid);
2793 int btrfs_block_can_be_shared(struct btrfs_root *root,
2794 struct extent_buffer *buf);
2795 void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
2796 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
2797 int btrfs_split_item(struct btrfs_trans_handle *trans,
2798 struct btrfs_root *root,
2799 struct btrfs_path *path,
2800 const struct btrfs_key *new_key,
2801 unsigned long split_offset);
2802 int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
2803 struct btrfs_root *root,
2804 struct btrfs_path *path,
2805 const struct btrfs_key *new_key);
2806 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
2807 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
2808 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2809 const struct btrfs_key *key, struct btrfs_path *p,
2810 int ins_len, int cow);
2811 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key,
2812 struct btrfs_path *p, u64 time_seq);
2813 int btrfs_search_slot_for_read(struct btrfs_root *root,
2814 const struct btrfs_key *key,
2815 struct btrfs_path *p, int find_higher,
2817 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2818 struct btrfs_root *root, struct extent_buffer *parent,
2819 int start_slot, u64 *last_ret,
2820 struct btrfs_key *progress);
2821 void btrfs_release_path(struct btrfs_path *p);
2822 struct btrfs_path *btrfs_alloc_path(void);
2823 void btrfs_free_path(struct btrfs_path *p);
2825 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2826 struct btrfs_path *path, int slot, int nr);
2827 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2828 struct btrfs_root *root,
2829 struct btrfs_path *path)
2831 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2834 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
2835 const struct btrfs_key *cpu_key, u32 *data_size,
2837 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2838 const struct btrfs_key *key, void *data, u32 data_size);
2839 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2840 struct btrfs_root *root,
2841 struct btrfs_path *path,
2842 const struct btrfs_key *cpu_key, u32 *data_size,
2845 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2846 struct btrfs_root *root,
2847 struct btrfs_path *path,
2848 const struct btrfs_key *key,
2851 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2854 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2855 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2856 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
2858 static inline int btrfs_next_old_item(struct btrfs_root *root,
2859 struct btrfs_path *p, u64 time_seq)
2862 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2863 return btrfs_next_old_leaf(root, p, time_seq);
2866 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
2868 return btrfs_next_old_item(root, p, 0);
2870 int btrfs_leaf_free_space(struct extent_buffer *leaf);
2871 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref,
2873 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
2874 struct btrfs_root *root,
2875 struct extent_buffer *node,
2876 struct extent_buffer *parent);
2877 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
2880 * Do it this way so we only ever do one test_bit in the normal case.
2882 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
2883 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
2891 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
2892 * anything except sleeping. This function is used to check the status of
2895 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info)
2897 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info);
2900 /* tree mod log functions from ctree.c */
2901 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
2902 struct seq_list *elem);
2903 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
2904 struct seq_list *elem);
2905 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
2908 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2909 u64 ref_id, u64 dirid, u64 sequence, const char *name,
2911 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
2912 u64 ref_id, u64 dirid, u64 *sequence, const char *name,
2914 int btrfs_del_root(struct btrfs_trans_handle *trans,
2915 const struct btrfs_key *key);
2916 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2917 const struct btrfs_key *key,
2918 struct btrfs_root_item *item);
2919 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
2920 struct btrfs_root *root,
2921 struct btrfs_key *key,
2922 struct btrfs_root_item *item);
2923 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key,
2924 struct btrfs_path *path, struct btrfs_root_item *root_item,
2925 struct btrfs_key *root_key);
2926 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
2927 void btrfs_set_root_node(struct btrfs_root_item *item,
2928 struct extent_buffer *node);
2929 void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
2930 void btrfs_update_root_times(struct btrfs_trans_handle *trans,
2931 struct btrfs_root *root);
2934 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2936 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
2938 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info);
2941 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
2942 const char *name, int name_len);
2943 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name,
2944 int name_len, struct btrfs_inode *dir,
2945 struct btrfs_key *location, u8 type, u64 index);
2946 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2947 struct btrfs_root *root,
2948 struct btrfs_path *path, u64 dir,
2949 const char *name, int name_len,
2951 struct btrfs_dir_item *
2952 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2953 struct btrfs_root *root,
2954 struct btrfs_path *path, u64 dir,
2955 u64 objectid, const char *name, int name_len,
2957 struct btrfs_dir_item *
2958 btrfs_search_dir_index_item(struct btrfs_root *root,
2959 struct btrfs_path *path, u64 dirid,
2960 const char *name, int name_len);
2961 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2962 struct btrfs_root *root,
2963 struct btrfs_path *path,
2964 struct btrfs_dir_item *di);
2965 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2966 struct btrfs_root *root,
2967 struct btrfs_path *path, u64 objectid,
2968 const char *name, u16 name_len,
2969 const void *data, u16 data_len);
2970 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2971 struct btrfs_root *root,
2972 struct btrfs_path *path, u64 dir,
2973 const char *name, u16 name_len,
2975 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
2976 struct btrfs_path *path,
2981 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
2982 struct btrfs_root *root, u64 offset);
2983 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
2984 struct btrfs_root *root, u64 offset);
2985 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2988 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2989 struct btrfs_root *root,
2990 const char *name, int name_len,
2991 u64 inode_objectid, u64 ref_objectid, u64 index);
2992 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2993 struct btrfs_root *root,
2994 const char *name, int name_len,
2995 u64 inode_objectid, u64 ref_objectid, u64 *index);
2996 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2997 struct btrfs_root *root,
2998 struct btrfs_path *path, u64 objectid);
2999 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3000 *root, struct btrfs_path *path,
3001 struct btrfs_key *location, int mod);
3003 struct btrfs_inode_extref *
3004 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans,
3005 struct btrfs_root *root,
3006 struct btrfs_path *path,
3007 const char *name, int name_len,
3008 u64 inode_objectid, u64 ref_objectid, int ins_len,
3011 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
3012 int slot, const char *name,
3014 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
3015 struct extent_buffer *leaf, int slot, u64 ref_objectid,
3016 const char *name, int name_len);
3018 struct btrfs_dio_private;
3019 int btrfs_del_csums(struct btrfs_trans_handle *trans,
3020 struct btrfs_root *root, u64 bytenr, u64 len);
3021 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio,
3022 u64 offset, u8 *dst);
3023 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
3024 struct btrfs_root *root,
3025 u64 objectid, u64 pos,
3026 u64 disk_offset, u64 disk_num_bytes,
3027 u64 num_bytes, u64 offset, u64 ram_bytes,
3028 u8 compression, u8 encryption, u16 other_encoding);
3029 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
3030 struct btrfs_root *root,
3031 struct btrfs_path *path, u64 objectid,
3032 u64 bytenr, int mod);
3033 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3034 struct btrfs_root *root,
3035 struct btrfs_ordered_sum *sums);
3036 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio,
3037 u64 file_start, int contig);
3038 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
3039 struct list_head *list, int search_commit);
3040 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
3041 const struct btrfs_path *path,
3042 struct btrfs_file_extent_item *fi,
3043 const bool new_inline,
3044 struct extent_map *em);
3045 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
3047 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start,
3049 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size);
3050 u64 btrfs_file_extent_end(const struct btrfs_path *path);
3053 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
3054 int mirror_num, unsigned long bio_flags);
3055 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset,
3056 struct page *page, u64 start, u64 end, int mirror);
3057 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
3058 u64 start, u64 len);
3059 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3060 u64 *orig_start, u64 *orig_block_len,
3061 u64 *ram_bytes, bool strict);
3063 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
3064 struct btrfs_inode *inode);
3065 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
3066 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
3067 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
3068 struct btrfs_root *root,
3069 struct btrfs_inode *dir, struct btrfs_inode *inode,
3070 const char *name, int name_len);
3071 int btrfs_add_link(struct btrfs_trans_handle *trans,
3072 struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
3073 const char *name, int name_len, int add_backref, u64 index);
3074 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
3075 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
3077 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
3078 struct btrfs_root *root,
3079 struct btrfs_inode *inode, u64 new_size,
3082 int btrfs_start_delalloc_snapshot(struct btrfs_root *root);
3083 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr);
3084 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
3085 unsigned int extra_bits,
3086 struct extent_state **cached_state);
3087 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3088 struct btrfs_root *new_root,
3089 struct btrfs_root *parent_root,
3091 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
3093 void btrfs_clear_delalloc_extent(struct inode *inode,
3094 struct extent_state *state, unsigned *bits);
3095 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
3096 struct extent_state *other);
3097 void btrfs_split_delalloc_extent(struct inode *inode,
3098 struct extent_state *orig, u64 split);
3099 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
3100 unsigned long bio_flags);
3101 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end);
3102 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
3103 int btrfs_readpage(struct file *file, struct page *page);
3104 void btrfs_evict_inode(struct inode *inode);
3105 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
3106 struct inode *btrfs_alloc_inode(struct super_block *sb);
3107 void btrfs_destroy_inode(struct inode *inode);
3108 void btrfs_free_inode(struct inode *inode);
3109 int btrfs_drop_inode(struct inode *inode);
3110 int __init btrfs_init_cachep(void);
3111 void __cold btrfs_destroy_cachep(void);
3112 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
3113 struct btrfs_root *root, struct btrfs_path *path);
3114 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
3115 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
3116 struct page *page, size_t pg_offset,
3117 u64 start, u64 end);
3118 int btrfs_update_inode(struct btrfs_trans_handle *trans,
3119 struct btrfs_root *root, struct btrfs_inode *inode);
3120 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
3121 struct btrfs_root *root, struct btrfs_inode *inode);
3122 int btrfs_orphan_add(struct btrfs_trans_handle *trans,
3123 struct btrfs_inode *inode);
3124 int btrfs_orphan_cleanup(struct btrfs_root *root);
3125 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size);
3126 void btrfs_add_delayed_iput(struct inode *inode);
3127 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
3128 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
3129 int btrfs_prealloc_file_range(struct inode *inode, int mode,
3130 u64 start, u64 num_bytes, u64 min_size,
3131 loff_t actual_len, u64 *alloc_hint);
3132 int btrfs_prealloc_file_range_trans(struct inode *inode,
3133 struct btrfs_trans_handle *trans, int mode,
3134 u64 start, u64 num_bytes, u64 min_size,
3135 loff_t actual_len, u64 *alloc_hint);
3136 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
3137 u64 start, u64 end, int *page_started, unsigned long *nr_written,
3138 struct writeback_control *wbc);
3139 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
3140 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start,
3141 u64 end, int uptodate);
3142 extern const struct dentry_operations btrfs_dentry_operations;
3143 extern const struct iomap_ops btrfs_dio_iomap_ops;
3144 extern const struct iomap_dio_ops btrfs_dio_ops;
3146 /* Inode locking type flags, by default the exclusive lock is taken */
3147 #define BTRFS_ILOCK_SHARED (1U << 0)
3148 #define BTRFS_ILOCK_TRY (1U << 1)
3150 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags);
3151 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags);
3152 void btrfs_update_inode_bytes(struct btrfs_inode *inode,
3153 const u64 add_bytes,
3154 const u64 del_bytes);
3157 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3158 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3159 int btrfs_ioctl_get_supported_features(void __user *arg);
3160 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode);
3161 int __pure btrfs_is_empty_uuid(u8 *uuid);
3162 int btrfs_defrag_file(struct inode *inode, struct file *file,
3163 struct btrfs_ioctl_defrag_range_args *range,
3164 u64 newer_than, unsigned long max_pages);
3165 void btrfs_get_block_group_info(struct list_head *groups_list,
3166 struct btrfs_ioctl_space_info *space);
3167 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info,
3168 struct btrfs_ioctl_balance_args *bargs);
3169 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info,
3170 enum btrfs_exclusive_operation type);
3171 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info);
3174 int __init btrfs_auto_defrag_init(void);
3175 void __cold btrfs_auto_defrag_exit(void);
3176 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
3177 struct btrfs_inode *inode);
3178 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3179 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3180 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3181 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end,
3183 extern const struct file_operations btrfs_file_operations;
3184 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
3185 struct btrfs_root *root, struct btrfs_inode *inode,
3186 struct btrfs_drop_extents_args *args);
3187 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path,
3188 const u64 start, const u64 end,
3189 struct btrfs_replace_extent_info *extent_info,
3190 struct btrfs_trans_handle **trans_out);
3191 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
3192 struct btrfs_inode *inode, u64 start, u64 end);
3193 int btrfs_release_file(struct inode *inode, struct file *file);
3194 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
3195 size_t num_pages, loff_t pos, size_t write_bytes,
3196 struct extent_state **cached, bool noreserve);
3197 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
3198 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
3199 size_t *write_bytes);
3200 void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
3203 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
3204 struct btrfs_root *root);
3207 int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
3208 unsigned long new_flags);
3209 int btrfs_sync_fs(struct super_block *sb, int wait);
3210 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
3211 u64 subvol_objectid);
3213 static inline __printf(2, 3) __cold
3214 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
3218 #ifdef CONFIG_PRINTK
3221 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
3223 #define btrfs_printk(fs_info, fmt, args...) \
3224 btrfs_no_printk(fs_info, fmt, ##args)
3227 #define btrfs_emerg(fs_info, fmt, args...) \
3228 btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
3229 #define btrfs_alert(fs_info, fmt, args...) \
3230 btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
3231 #define btrfs_crit(fs_info, fmt, args...) \
3232 btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
3233 #define btrfs_err(fs_info, fmt, args...) \
3234 btrfs_printk(fs_info, KERN_ERR fmt, ##args)
3235 #define btrfs_warn(fs_info, fmt, args...) \
3236 btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
3237 #define btrfs_notice(fs_info, fmt, args...) \
3238 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
3239 #define btrfs_info(fs_info, fmt, args...) \
3240 btrfs_printk(fs_info, KERN_INFO fmt, ##args)
3243 * Wrappers that use printk_in_rcu
3245 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
3246 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3247 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \
3248 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3249 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \
3250 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3251 #define btrfs_err_in_rcu(fs_info, fmt, args...) \
3252 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
3253 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \
3254 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3255 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \
3256 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3257 #define btrfs_info_in_rcu(fs_info, fmt, args...) \
3258 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)
3261 * Wrappers that use a ratelimited printk_in_rcu
3263 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
3264 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
3265 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
3266 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
3267 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
3268 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
3269 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
3270 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
3271 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
3272 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
3273 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
3274 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
3275 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
3276 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)
3279 * Wrappers that use a ratelimited printk
3281 #define btrfs_emerg_rl(fs_info, fmt, args...) \
3282 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
3283 #define btrfs_alert_rl(fs_info, fmt, args...) \
3284 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
3285 #define btrfs_crit_rl(fs_info, fmt, args...) \
3286 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
3287 #define btrfs_err_rl(fs_info, fmt, args...) \
3288 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
3289 #define btrfs_warn_rl(fs_info, fmt, args...) \
3290 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
3291 #define btrfs_notice_rl(fs_info, fmt, args...) \
3292 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
3293 #define btrfs_info_rl(fs_info, fmt, args...) \
3294 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
3296 #if defined(CONFIG_DYNAMIC_DEBUG)
3297 #define btrfs_debug(fs_info, fmt, args...) \
3298 _dynamic_func_call_no_desc(fmt, btrfs_printk, \
3299 fs_info, KERN_DEBUG fmt, ##args)
3300 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3301 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \
3302 fs_info, KERN_DEBUG fmt, ##args)
3303 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3304 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \
3305 fs_info, KERN_DEBUG fmt, ##args)
3306 #define btrfs_debug_rl(fs_info, fmt, args...) \
3307 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \
3308 fs_info, KERN_DEBUG fmt, ##args)
3309 #elif defined(DEBUG)
3310 #define btrfs_debug(fs_info, fmt, args...) \
3311 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
3312 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3313 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3314 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3315 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3316 #define btrfs_debug_rl(fs_info, fmt, args...) \
3317 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
3319 #define btrfs_debug(fs_info, fmt, args...) \
3320 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3321 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \
3322 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3323 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
3324 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
3325 #define btrfs_debug_rl(fs_info, fmt, args...) \
3326 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
3329 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \
3332 btrfs_printk(fs_info, fmt, ##args); \
3333 rcu_read_unlock(); \
3336 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \
3339 btrfs_no_printk(fs_info, fmt, ##args); \
3340 rcu_read_unlock(); \
3343 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \
3345 static DEFINE_RATELIMIT_STATE(_rs, \
3346 DEFAULT_RATELIMIT_INTERVAL, \
3347 DEFAULT_RATELIMIT_BURST); \
3348 if (__ratelimit(&_rs)) \
3349 btrfs_printk(fs_info, fmt, ##args); \
3352 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \
3355 btrfs_printk_ratelimited(fs_info, fmt, ##args); \
3356 rcu_read_unlock(); \
3359 #ifdef CONFIG_BTRFS_ASSERT
3361 static inline void assertfail(const char *expr, const char *file, int line)
3363 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
3367 #define ASSERT(expr) \
3368 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__))
3371 static inline void assertfail(const char *expr, const char* file, int line) { }
3372 #define ASSERT(expr) (void)(expr)
3376 * Use that for functions that are conditionally exported for sanity tests but
3379 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3380 #define EXPORT_FOR_TESTS static
3382 #define EXPORT_FOR_TESTS
3386 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info)
3389 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel");
3394 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function,
3395 unsigned int line, int errno, const char *fmt, ...);
3397 const char * __attribute_const__ btrfs_decode_error(int errno);
3400 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
3401 const char *function,
3402 unsigned int line, int errno);
3405 * Call btrfs_abort_transaction as early as possible when an error condition is
3406 * detected, that way the exact line number is reported.
3408 #define btrfs_abort_transaction(trans, errno) \
3410 /* Report first abort since mount */ \
3411 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \
3412 &((trans)->fs_info->fs_state))) { \
3413 if ((errno) != -EIO && (errno) != -EROFS) { \
3414 WARN(1, KERN_DEBUG \
3415 "BTRFS: Transaction aborted (error %d)\n", \
3418 btrfs_debug((trans)->fs_info, \
3419 "Transaction aborted (error %d)", \
3423 __btrfs_abort_transaction((trans), __func__, \
3424 __LINE__, (errno)); \
3427 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \
3429 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \
3430 (errno), fmt, ##args); \
3435 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
3436 unsigned int line, int errno, const char *fmt, ...);
3438 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
3439 * will panic(). Otherwise we BUG() here.
3441 #define btrfs_panic(fs_info, errno, fmt, args...) \
3443 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
3448 /* compatibility and incompatibility defines */
3450 #define btrfs_set_fs_incompat(__fs_info, opt) \
3451 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3454 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
3455 u64 flag, const char* name)
3457 struct btrfs_super_block *disk_super;
3460 disk_super = fs_info->super_copy;
3461 features = btrfs_super_incompat_flags(disk_super);
3462 if (!(features & flag)) {
3463 spin_lock(&fs_info->super_lock);
3464 features = btrfs_super_incompat_flags(disk_super);
3465 if (!(features & flag)) {
3467 btrfs_set_super_incompat_flags(disk_super, features);
3469 "setting incompat feature flag for %s (0x%llx)",
3472 spin_unlock(&fs_info->super_lock);
3476 #define btrfs_clear_fs_incompat(__fs_info, opt) \
3477 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \
3480 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info,
3481 u64 flag, const char* name)
3483 struct btrfs_super_block *disk_super;
3486 disk_super = fs_info->super_copy;
3487 features = btrfs_super_incompat_flags(disk_super);
3488 if (features & flag) {
3489 spin_lock(&fs_info->super_lock);
3490 features = btrfs_super_incompat_flags(disk_super);
3491 if (features & flag) {
3493 btrfs_set_super_incompat_flags(disk_super, features);
3495 "clearing incompat feature flag for %s (0x%llx)",
3498 spin_unlock(&fs_info->super_lock);
3502 #define btrfs_fs_incompat(fs_info, opt) \
3503 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
3505 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
3507 struct btrfs_super_block *disk_super;
3508 disk_super = fs_info->super_copy;
3509 return !!(btrfs_super_incompat_flags(disk_super) & flag);
3512 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
3513 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3516 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info,
3517 u64 flag, const char *name)
3519 struct btrfs_super_block *disk_super;
3522 disk_super = fs_info->super_copy;
3523 features = btrfs_super_compat_ro_flags(disk_super);
3524 if (!(features & flag)) {
3525 spin_lock(&fs_info->super_lock);
3526 features = btrfs_super_compat_ro_flags(disk_super);
3527 if (!(features & flag)) {
3529 btrfs_set_super_compat_ro_flags(disk_super, features);
3531 "setting compat-ro feature flag for %s (0x%llx)",
3534 spin_unlock(&fs_info->super_lock);
3538 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \
3539 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \
3542 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info,
3543 u64 flag, const char *name)
3545 struct btrfs_super_block *disk_super;
3548 disk_super = fs_info->super_copy;
3549 features = btrfs_super_compat_ro_flags(disk_super);
3550 if (features & flag) {
3551 spin_lock(&fs_info->super_lock);
3552 features = btrfs_super_compat_ro_flags(disk_super);
3553 if (features & flag) {
3555 btrfs_set_super_compat_ro_flags(disk_super, features);
3557 "clearing compat-ro feature flag for %s (0x%llx)",
3560 spin_unlock(&fs_info->super_lock);
3564 #define btrfs_fs_compat_ro(fs_info, opt) \
3565 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
3567 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
3569 struct btrfs_super_block *disk_super;
3570 disk_super = fs_info->super_copy;
3571 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
3575 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
3576 struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
3577 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
3578 int btrfs_init_acl(struct btrfs_trans_handle *trans,
3579 struct inode *inode, struct inode *dir);
3581 #define btrfs_get_acl NULL
3582 #define btrfs_set_acl NULL
3583 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
3584 struct inode *inode, struct inode *dir)
3591 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start);
3592 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
3593 struct btrfs_root *root);
3594 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
3595 struct btrfs_root *root);
3596 int btrfs_recover_relocation(struct btrfs_root *root);
3597 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len);
3598 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
3599 struct btrfs_root *root, struct extent_buffer *buf,
3600 struct extent_buffer *cow);
3601 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
3602 u64 *bytes_to_reserve);
3603 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
3604 struct btrfs_pending_snapshot *pending);
3605 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info);
3606 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info,
3608 int btrfs_should_ignore_reloc_root(struct btrfs_root *root);
3611 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
3612 u64 end, struct btrfs_scrub_progress *progress,
3613 int readonly, int is_dev_replace);
3614 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
3615 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
3616 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
3617 int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
3618 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
3619 struct btrfs_scrub_progress *progress);
3620 static inline void btrfs_init_full_stripe_locks_tree(
3621 struct btrfs_full_stripe_locks_tree *locks_root)
3623 locks_root->root = RB_ROOT;
3624 mutex_init(&locks_root->lock);
3628 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
3629 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
3630 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);
3632 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
3634 btrfs_bio_counter_sub(fs_info, 1);
3638 struct reada_control {
3639 struct btrfs_fs_info *fs_info; /* tree to prefetch */
3640 struct btrfs_key key_start;
3641 struct btrfs_key key_end; /* exclusive */
3644 wait_queue_head_t wait;
3646 struct reada_control *btrfs_reada_add(struct btrfs_root *root,
3647 struct btrfs_key *start, struct btrfs_key *end);
3648 int btrfs_reada_wait(void *handle);
3649 void btrfs_reada_detach(void *handle);
3650 int btree_readahead_hook(struct extent_buffer *eb, int err);
3651 void btrfs_reada_remove_dev(struct btrfs_device *dev);
3652 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev);
3654 static inline int is_fstree(u64 rootid)
3656 if (rootid == BTRFS_FS_TREE_OBJECTID ||
3657 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
3658 !btrfs_qgroup_level(rootid)))
3663 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
3665 return signal_pending(current);
3668 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
3670 /* Sanity test specific functions */
3671 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
3672 void btrfs_test_destroy_inode(struct inode *inode);
3673 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3675 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
3678 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
3684 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
3686 return fs_info->zoned != 0;