Commit | Line | Data |
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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 | |
22b46bdc | 9 | #include <linux/sizes.h> |
602035d7 | 10 | #include <linux/compiler_types.h> |
22b46bdc DS |
11 | #include "ctree.h" |
12 | #include "fs.h" | |
13 | ||
602035d7 DS |
14 | struct block_device; |
15 | struct super_block; | |
16 | struct extent_buffer; | |
17 | struct btrfs_device; | |
18 | struct btrfs_fs_devices; | |
19 | struct btrfs_fs_info; | |
20 | struct btrfs_super_block; | |
21 | struct btrfs_trans_handle; | |
22 | struct btrfs_tree_parent_check; | |
23 | struct btrfs_transaction; | |
24 | ||
a512bbf8 YZ |
25 | #define BTRFS_SUPER_MIRROR_MAX 3 |
26 | #define BTRFS_SUPER_MIRROR_SHIFT 12 | |
27 | ||
9f6d2510 DS |
28 | /* |
29 | * Fixed blocksize for all devices, applies to specific ways of reading | |
30 | * metadata like superblock. Must meet the set_blocksize requirements. | |
31 | * | |
32 | * Do not change. | |
33 | */ | |
34 | #define BTRFS_BDEV_BLOCKSIZE (4096) | |
35 | ||
a512bbf8 YZ |
36 | static inline u64 btrfs_sb_offset(int mirror) |
37 | { | |
ee22184b | 38 | u64 start = SZ_16K; |
a512bbf8 YZ |
39 | if (mirror) |
40 | return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror); | |
41 | return BTRFS_SUPER_INFO_OFFSET; | |
42 | } | |
43 | ||
2917f741 | 44 | void btrfs_check_leaked_roots(const struct btrfs_fs_info *fs_info); |
8260edba | 45 | void btrfs_init_fs_info(struct btrfs_fs_info *fs_info); |
581c1760 | 46 | struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, |
789d6a3a | 47 | struct btrfs_tree_parent_check *check); |
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); | |
44c0ca21 | 52 | int btrfs_start_pre_rw_mount(struct btrfs_fs_info *fs_info); |
3d17adea QW |
53 | int btrfs_check_super_csum(struct btrfs_fs_info *fs_info, |
54 | const struct btrfs_super_block *disk_sb); | |
2917f741 DS |
55 | int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_devices, |
56 | const char *options); | |
b105e927 | 57 | void __cold close_ctree(struct btrfs_fs_info *fs_info); |
2917f741 DS |
58 | int btrfs_validate_super(const struct btrfs_fs_info *fs_info, |
59 | const struct btrfs_super_block *sb, int mirror_num); | |
2ba48b20 | 60 | int btrfs_check_features(struct btrfs_fs_info *fs_info, bool is_rw_mount); |
eece6a9c | 61 | int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors); |
8f32380d JT |
62 | struct btrfs_super_block *btrfs_read_dev_super(struct block_device *bdev); |
63 | struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev, | |
a05d3c91 | 64 | int copy_num, bool drop_cache); |
6bccf3ab | 65 | int btrfs_commit_super(struct btrfs_fs_info *fs_info); |
62a2c73e | 66 | struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
2917f741 | 67 | const struct btrfs_key *key); |
cb517eab MX |
68 | int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, |
69 | struct btrfs_root *root); | |
faa2dbf0 | 70 | void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info); |
c00869f1 MX |
71 | |
72 | struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, | |
56e9357a | 73 | u64 objectid, bool check_ref); |
2dfb1e43 | 74 | struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info, |
e2b54eaf | 75 | u64 objectid, dev_t *anon_dev); |
49d11bea JB |
76 | struct btrfs_root *btrfs_get_fs_root_commit_root(struct btrfs_fs_info *fs_info, |
77 | struct btrfs_path *path, | |
78 | u64 objectid); | |
abed4aaa JB |
79 | int btrfs_global_root_insert(struct btrfs_root *root); |
80 | void btrfs_global_root_delete(struct btrfs_root *root); | |
81 | struct btrfs_root *btrfs_global_root(struct btrfs_fs_info *fs_info, | |
82 | struct btrfs_key *key); | |
83 | struct btrfs_root *btrfs_csum_root(struct btrfs_fs_info *fs_info, u64 bytenr); | |
84 | struct btrfs_root *btrfs_extent_root(struct btrfs_fs_info *fs_info, u64 bytenr); | |
c00869f1 | 85 | |
0d4b0463 | 86 | void btrfs_free_fs_info(struct btrfs_fs_info *fs_info); |
2ff7e61e JM |
87 | void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info); |
88 | void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info); | |
cb517eab MX |
89 | void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, |
90 | struct btrfs_root *root); | |
046b562b | 91 | int btrfs_validate_extent_buffer(struct extent_buffer *eb, |
2917f741 | 92 | const struct btrfs_tree_parent_check *check); |
06ea65a3 | 93 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
da17066c | 94 | struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info); |
06ea65a3 JB |
95 | #endif |
96 | ||
b0feb9d9 MX |
97 | /* |
98 | * This function is used to grab the root, and avoid it is freed when we | |
99 | * access it. But it doesn't ensure that the tree is not dropped. | |
100 | * | |
101 | * If you want to ensure the whole tree is safe, you should use | |
102 | * fs_info->subvol_srcu | |
103 | */ | |
00246528 | 104 | static inline struct btrfs_root *btrfs_grab_root(struct btrfs_root *root) |
b0feb9d9 | 105 | { |
4cdfd930 JB |
106 | if (!root) |
107 | return NULL; | |
0700cea7 | 108 | if (refcount_inc_not_zero(&root->refs)) |
b0feb9d9 MX |
109 | return root; |
110 | return NULL; | |
111 | } | |
112 | ||
8c38938c | 113 | void btrfs_put_root(struct btrfs_root *root); |
50564b65 FM |
114 | void btrfs_mark_buffer_dirty(struct btrfs_trans_handle *trans, |
115 | struct extent_buffer *buf); | |
b9fab919 CM |
116 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
117 | int atomic); | |
789d6a3a | 118 | int btrfs_read_extent_buffer(struct extent_buffer *buf, |
2917f741 | 119 | const struct btrfs_tree_parent_check *check); |
ab2072b2 | 120 | |
542e300e | 121 | blk_status_t btree_csum_one_bio(struct btrfs_bio *bbio); |
6ab6ebb7 NA |
122 | int btrfs_alloc_log_tree_node(struct btrfs_trans_handle *trans, |
123 | struct btrfs_root *root); | |
e02119d5 CM |
124 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
125 | struct btrfs_fs_info *fs_info); | |
7237f183 YZ |
126 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
127 | struct btrfs_root *root); | |
c79a1751 | 128 | void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *trans, |
2ff7e61e | 129 | struct btrfs_fs_info *fs_info); |
49b25e05 | 130 | void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans, |
2ff7e61e | 131 | struct btrfs_fs_info *fs_info); |
20897f5c | 132 | struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
20897f5c | 133 | u64 objectid); |
943c6e99 | 134 | int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags); |
543068a2 | 135 | int btrfs_get_free_objectid(struct btrfs_root *root, u64 *objectid); |
453e4873 | 136 | int btrfs_init_root_free_objectid(struct btrfs_root *root); |
4008c04a | 137 | |
eb60ceac | 138 | #endif |