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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 | 45 | struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, |
1b7ec85e JB |
46 | u64 owner_root, u64 parent_transid, |
47 | int level, struct btrfs_key *first_key); | |
2ff7e61e JM |
48 | struct extent_buffer *btrfs_find_create_tree_block( |
49 | struct btrfs_fs_info *fs_info, | |
3fbaf258 JB |
50 | u64 bytenr, u64 owner_root, |
51 | int level); | |
6a884d7d | 52 | void btrfs_clean_tree_block(struct extent_buffer *buf); |
8cd29088 | 53 | void btrfs_clear_oneshot_options(struct btrfs_fs_info *fs_info); |
44c0ca21 | 54 | int btrfs_start_pre_rw_mount(struct btrfs_fs_info *fs_info); |
b105e927 | 55 | int __cold open_ctree(struct super_block *sb, |
ad2b2c80 AV |
56 | struct btrfs_fs_devices *fs_devices, |
57 | char *options); | |
b105e927 | 58 | void __cold close_ctree(struct btrfs_fs_info *fs_info); |
eece6a9c | 59 | int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors); |
8f32380d JT |
60 | struct btrfs_super_block *btrfs_read_dev_super(struct block_device *bdev); |
61 | struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev, | |
62 | int copy_num); | |
6bccf3ab | 63 | int btrfs_commit_super(struct btrfs_fs_info *fs_info); |
62a2c73e JB |
64 | struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
65 | struct btrfs_key *key); | |
cb517eab MX |
66 | int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, |
67 | struct btrfs_root *root); | |
faa2dbf0 | 68 | void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info); |
c00869f1 MX |
69 | |
70 | struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, | |
56e9357a | 71 | u64 objectid, bool check_ref); |
2dfb1e43 QW |
72 | struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info, |
73 | u64 objectid, dev_t anon_dev); | |
49d11bea JB |
74 | struct btrfs_root *btrfs_get_fs_root_commit_root(struct btrfs_fs_info *fs_info, |
75 | struct btrfs_path *path, | |
76 | u64 objectid); | |
c00869f1 | 77 | |
0d4b0463 | 78 | void btrfs_free_fs_info(struct btrfs_fs_info *fs_info); |
c146afad | 79 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); |
2ff7e61e JM |
80 | void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info); |
81 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info); | |
cb517eab MX |
82 | void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, |
83 | struct btrfs_root *root); | |
8e1dc982 | 84 | int btrfs_validate_metadata_buffer(struct btrfs_io_bio *io_bio, |
9a446d6a NB |
85 | struct page *page, u64 start, u64 end, |
86 | int mirror); | |
1b36294a NB |
87 | blk_status_t btrfs_submit_metadata_bio(struct inode *inode, struct bio *bio, |
88 | int mirror_num, unsigned long bio_flags); | |
06ea65a3 | 89 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
da17066c | 90 | struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info); |
06ea65a3 JB |
91 | #endif |
92 | ||
b0feb9d9 MX |
93 | /* |
94 | * This function is used to grab the root, and avoid it is freed when we | |
95 | * access it. But it doesn't ensure that the tree is not dropped. | |
96 | * | |
97 | * If you want to ensure the whole tree is safe, you should use | |
98 | * fs_info->subvol_srcu | |
99 | */ | |
00246528 | 100 | static inline struct btrfs_root *btrfs_grab_root(struct btrfs_root *root) |
b0feb9d9 | 101 | { |
4cdfd930 JB |
102 | if (!root) |
103 | return NULL; | |
0700cea7 | 104 | if (refcount_inc_not_zero(&root->refs)) |
b0feb9d9 MX |
105 | return root; |
106 | return NULL; | |
107 | } | |
108 | ||
8c38938c | 109 | void btrfs_put_root(struct btrfs_root *root); |
5f39d397 | 110 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf); |
b9fab919 CM |
111 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
112 | int atomic); | |
581c1760 QW |
113 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level, |
114 | struct btrfs_key *first_key); | |
4e4cbee9 | 115 | blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
bfebd8b5 | 116 | enum btrfs_wq_endio_type metadata); |
8896a08d QW |
117 | blk_status_t btrfs_wq_submit_bio(struct inode *inode, struct bio *bio, |
118 | int mirror_num, unsigned long bio_flags, | |
1941b64b | 119 | u64 dio_file_offset, |
8896a08d | 120 | extent_submit_bio_start_t *submit_bio_start); |
e288c080 DS |
121 | blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio, |
122 | int mirror_num); | |
6ab6ebb7 NA |
123 | int btrfs_alloc_log_tree_node(struct btrfs_trans_handle *trans, |
124 | struct btrfs_root *root); | |
e02119d5 CM |
125 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
126 | struct btrfs_fs_info *fs_info); | |
7237f183 YZ |
127 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
128 | struct btrfs_root *root); | |
c79a1751 | 129 | void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *trans, |
2ff7e61e | 130 | struct btrfs_fs_info *fs_info); |
49b25e05 | 131 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans, |
2ff7e61e | 132 | struct btrfs_fs_info *fs_info); |
20897f5c | 133 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
20897f5c AJ |
134 | u64 objectid); |
135 | int btree_lock_page_hook(struct page *page, void *data, | |
136 | void (*flush_fn)(void *)); | |
943c6e99 | 137 | int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags); |
543068a2 | 138 | int btrfs_get_free_objectid(struct btrfs_root *root, u64 *objectid); |
453e4873 | 139 | int btrfs_init_root_free_objectid(struct btrfs_root *root); |
97eb6b69 | 140 | int __init btrfs_end_io_wq_init(void); |
e67c718b | 141 | void __cold btrfs_end_io_wq_exit(void); |
4008c04a CM |
142 | |
143 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
85d4e461 CM |
144 | void btrfs_set_buffer_lockdep_class(u64 objectid, |
145 | struct extent_buffer *eb, int level); | |
4008c04a | 146 | #else |
85d4e461 CM |
147 | static inline void btrfs_set_buffer_lockdep_class(u64 objectid, |
148 | struct extent_buffer *eb, int level) | |
4008c04a CM |
149 | { |
150 | } | |
151 | #endif | |
9888c340 | 152 | |
eb60ceac | 153 | #endif |