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1 | /* | |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
19 | #ifndef __DISKIO__ | |
20 | #define __DISKIO__ | |
21 | ||
22 | #define BTRFS_SUPER_INFO_OFFSET (64 * 1024) | |
23 | #define BTRFS_SUPER_INFO_SIZE 4096 | |
24 | ||
25 | #define BTRFS_SUPER_MIRROR_MAX 3 | |
26 | #define BTRFS_SUPER_MIRROR_SHIFT 12 | |
27 | ||
28 | static inline u64 btrfs_sb_offset(int mirror) | |
29 | { | |
30 | u64 start = 16 * 1024; | |
31 | if (mirror) | |
32 | return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror); | |
33 | return BTRFS_SUPER_INFO_OFFSET; | |
34 | } | |
35 | ||
36 | struct btrfs_device; | |
37 | struct btrfs_fs_devices; | |
38 | ||
39 | struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, | |
40 | u32 blocksize, u64 parent_transid); | |
41 | int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, | |
42 | u64 parent_transid); | |
43 | int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize, | |
44 | int mirror_num, struct extent_buffer **eb); | |
45 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, | |
46 | u64 bytenr, u32 blocksize); | |
47 | int clean_tree_block(struct btrfs_trans_handle *trans, | |
48 | struct btrfs_root *root, struct extent_buffer *buf); | |
49 | struct btrfs_root *open_ctree(struct super_block *sb, | |
50 | struct btrfs_fs_devices *fs_devices, | |
51 | char *options); | |
52 | int close_ctree(struct btrfs_root *root); | |
53 | int write_ctree_super(struct btrfs_trans_handle *trans, | |
54 | struct btrfs_root *root, int max_mirrors); | |
55 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev); | |
56 | int btrfs_commit_super(struct btrfs_root *root); | |
57 | int btrfs_error_commit_super(struct btrfs_root *root); | |
58 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, | |
59 | u64 bytenr, u32 blocksize); | |
60 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, | |
61 | struct btrfs_key *location); | |
62 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, | |
63 | struct btrfs_key *location); | |
64 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); | |
65 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); | |
66 | void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); | |
67 | int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); | |
68 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf); | |
69 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid); | |
70 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf); | |
71 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid); | |
72 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len); | |
73 | void btrfs_csum_final(u32 crc, char *result); | |
74 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, | |
75 | int metadata); | |
76 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, | |
77 | int rw, struct bio *bio, int mirror_num, | |
78 | unsigned long bio_flags, u64 bio_offset, | |
79 | extent_submit_bio_hook_t *submit_bio_start, | |
80 | extent_submit_bio_hook_t *submit_bio_done); | |
81 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info); | |
82 | int btrfs_write_tree_block(struct extent_buffer *buf); | |
83 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf); | |
84 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, | |
85 | struct btrfs_fs_info *fs_info); | |
86 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, | |
87 | struct btrfs_root *root); | |
88 | ||
89 | struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info); | |
90 | ||
91 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
92 | void btrfs_init_lockdep(void); | |
93 | void btrfs_set_buffer_lockdep_class(u64 objectid, | |
94 | struct extent_buffer *eb, int level); | |
95 | #else | |
96 | static inline void btrfs_init_lockdep(void) | |
97 | { } | |
98 | static inline void btrfs_set_buffer_lockdep_class(u64 objectid, | |
99 | struct extent_buffer *eb, int level) | |
100 | { | |
101 | } | |
102 | #endif | |
103 | #endif |