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9888c340 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6cbd5570 CM |
2 | /* |
3 | * Copyright (C) 2007 Oracle. All rights reserved. | |
6cbd5570 CM |
4 | */ |
5 | ||
9888c340 DS |
6 | #ifndef BTRFS_DISK_IO_H |
7 | #define BTRFS_DISK_IO_H | |
eb60ceac | 8 | |
ee22184b | 9 | #define BTRFS_SUPER_INFO_OFFSET SZ_64K |
f2984462 | 10 | #define BTRFS_SUPER_INFO_SIZE 4096 |
a512bbf8 YZ |
11 | |
12 | #define BTRFS_SUPER_MIRROR_MAX 3 | |
13 | #define BTRFS_SUPER_MIRROR_SHIFT 12 | |
14 | ||
9f6d2510 DS |
15 | /* |
16 | * Fixed blocksize for all devices, applies to specific ways of reading | |
17 | * metadata like superblock. Must meet the set_blocksize requirements. | |
18 | * | |
19 | * Do not change. | |
20 | */ | |
21 | #define BTRFS_BDEV_BLOCKSIZE (4096) | |
22 | ||
bfebd8b5 | 23 | enum btrfs_wq_endio_type { |
bbe339cc DS |
24 | BTRFS_WQ_ENDIO_DATA, |
25 | BTRFS_WQ_ENDIO_METADATA, | |
26 | BTRFS_WQ_ENDIO_FREE_SPACE, | |
27 | BTRFS_WQ_ENDIO_RAID56, | |
53b381b3 DW |
28 | }; |
29 | ||
a512bbf8 YZ |
30 | static inline u64 btrfs_sb_offset(int mirror) |
31 | { | |
ee22184b | 32 | u64 start = SZ_16K; |
a512bbf8 YZ |
33 | if (mirror) |
34 | return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror); | |
35 | return BTRFS_SUPER_INFO_OFFSET; | |
36 | } | |
37 | ||
0b86a832 | 38 | struct btrfs_device; |
8a4b83cc | 39 | struct btrfs_fs_devices; |
e20d96d6 | 40 | |
bd647ce3 | 41 | void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info); |
8260edba | 42 | void btrfs_init_fs_info(struct btrfs_fs_info *fs_info); |
e064d5e9 | 43 | int btrfs_verify_level_key(struct extent_buffer *eb, int level, |
448de471 | 44 | struct btrfs_key *first_key, u64 parent_transid); |
581c1760 QW |
45 | struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, |
46 | u64 parent_transid, int level, | |
47 | struct btrfs_key *first_key); | |
2ff7e61e | 48 | void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr); |
2ff7e61e JM |
49 | struct extent_buffer *btrfs_find_create_tree_block( |
50 | struct btrfs_fs_info *fs_info, | |
51 | u64 bytenr); | |
6a884d7d | 52 | void btrfs_clean_tree_block(struct extent_buffer *buf); |
b105e927 | 53 | int __cold open_ctree(struct super_block *sb, |
ad2b2c80 AV |
54 | struct btrfs_fs_devices *fs_devices, |
55 | char *options); | |
b105e927 | 56 | void __cold close_ctree(struct btrfs_fs_info *fs_info); |
eece6a9c | 57 | int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors); |
8f32380d JT |
58 | struct btrfs_super_block *btrfs_read_dev_super(struct block_device *bdev); |
59 | struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev, | |
60 | int copy_num); | |
6bccf3ab | 61 | int btrfs_commit_super(struct btrfs_fs_info *fs_info); |
62a2c73e JB |
62 | struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
63 | struct btrfs_key *key); | |
cb517eab MX |
64 | int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, |
65 | struct btrfs_root *root); | |
faa2dbf0 | 66 | void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info); |
c00869f1 MX |
67 | |
68 | struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, | |
56e9357a | 69 | u64 objectid, bool check_ref); |
c00869f1 | 70 | |
0d4b0463 | 71 | void btrfs_free_fs_info(struct btrfs_fs_info *fs_info); |
c146afad | 72 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); |
2ff7e61e JM |
73 | void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info); |
74 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info); | |
cb517eab MX |
75 | void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, |
76 | struct btrfs_root *root); | |
b0feb9d9 | 77 | |
06ea65a3 | 78 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
da17066c | 79 | struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info); |
06ea65a3 JB |
80 | #endif |
81 | ||
b0feb9d9 MX |
82 | /* |
83 | * This function is used to grab the root, and avoid it is freed when we | |
84 | * access it. But it doesn't ensure that the tree is not dropped. | |
85 | * | |
86 | * If you want to ensure the whole tree is safe, you should use | |
87 | * fs_info->subvol_srcu | |
88 | */ | |
00246528 | 89 | static inline struct btrfs_root *btrfs_grab_root(struct btrfs_root *root) |
b0feb9d9 | 90 | { |
4cdfd930 JB |
91 | if (!root) |
92 | return NULL; | |
0700cea7 | 93 | if (refcount_inc_not_zero(&root->refs)) |
b0feb9d9 MX |
94 | return root; |
95 | return NULL; | |
96 | } | |
97 | ||
8c38938c | 98 | void btrfs_put_root(struct btrfs_root *root); |
5f39d397 | 99 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf); |
b9fab919 CM |
100 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
101 | int atomic); | |
581c1760 QW |
102 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level, |
103 | struct btrfs_key *first_key); | |
4e4cbee9 | 104 | blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
bfebd8b5 | 105 | enum btrfs_wq_endio_type metadata); |
8c27cb35 | 106 | blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, |
c6100a4b JB |
107 | int mirror_num, unsigned long bio_flags, |
108 | u64 bio_offset, void *private_data, | |
e288c080 DS |
109 | extent_submit_bio_start_t *submit_bio_start); |
110 | blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio, | |
111 | int mirror_num); | |
e02119d5 CM |
112 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
113 | struct btrfs_fs_info *fs_info); | |
7237f183 YZ |
114 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
115 | struct btrfs_root *root); | |
c79a1751 | 116 | void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *trans, |
2ff7e61e | 117 | struct btrfs_fs_info *fs_info); |
49b25e05 | 118 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans, |
2ff7e61e | 119 | struct btrfs_fs_info *fs_info); |
20897f5c | 120 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
20897f5c AJ |
121 | u64 objectid); |
122 | int btree_lock_page_hook(struct page *page, void *data, | |
123 | void (*flush_fn)(void *)); | |
6af49dbd | 124 | struct extent_map *btree_get_extent(struct btrfs_inode *inode, |
39b07b5d OS |
125 | struct page *page, size_t pg_offset, |
126 | u64 start, u64 len); | |
943c6e99 | 127 | int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags); |
97eb6b69 | 128 | int __init btrfs_end_io_wq_init(void); |
e67c718b | 129 | void __cold btrfs_end_io_wq_exit(void); |
4008c04a CM |
130 | |
131 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
85d4e461 CM |
132 | void btrfs_init_lockdep(void); |
133 | void btrfs_set_buffer_lockdep_class(u64 objectid, | |
134 | struct extent_buffer *eb, int level); | |
4008c04a | 135 | #else |
85d4e461 CM |
136 | static inline void btrfs_init_lockdep(void) |
137 | { } | |
138 | static inline void btrfs_set_buffer_lockdep_class(u64 objectid, | |
139 | struct extent_buffer *eb, int level) | |
4008c04a CM |
140 | { |
141 | } | |
142 | #endif | |
9888c340 | 143 | |
eb60ceac | 144 | #endif |