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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 | struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, | |
44 | u64 bytenr, u32 blocksize); | |
45 | int clean_tree_block(struct btrfs_trans_handle *trans, | |
46 | struct btrfs_root *root, struct extent_buffer *buf); | |
47 | struct btrfs_root *open_ctree(struct super_block *sb, | |
48 | struct btrfs_fs_devices *fs_devices, | |
49 | char *options); | |
50 | int close_ctree(struct btrfs_root *root); | |
51 | int write_ctree_super(struct btrfs_trans_handle *trans, | |
52 | struct btrfs_root *root, int max_mirrors); | |
53 | struct buffer_head *btrfs_read_dev_super(struct block_device *bdev); | |
54 | int btrfs_commit_super(struct btrfs_root *root); | |
55 | struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, | |
56 | u64 bytenr, u32 blocksize); | |
57 | struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, | |
58 | u64 root_objectid); | |
59 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, | |
60 | struct btrfs_key *location, | |
61 | const char *name, int namelen); | |
62 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, | |
63 | struct btrfs_key *location); | |
64 | struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, | |
65 | struct btrfs_key *location); | |
66 | int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); | |
67 | int btrfs_insert_dev_radix(struct btrfs_root *root, | |
68 | struct block_device *bdev, | |
69 | u64 device_id, | |
70 | u64 block_start, | |
71 | u64 num_blocks); | |
72 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); | |
73 | int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); | |
74 | void btrfs_mark_buffer_dirty(struct extent_buffer *buf); | |
75 | void btrfs_mark_buffer_dirty_nonblocking(struct extent_buffer *buf); | |
76 | int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid); | |
77 | int btrfs_set_buffer_uptodate(struct extent_buffer *buf); | |
78 | int wait_on_tree_block_writeback(struct btrfs_root *root, | |
79 | struct extent_buffer *buf); | |
80 | int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid); | |
81 | u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len); | |
82 | void btrfs_csum_final(u32 crc, char *result); | |
83 | int btrfs_open_device(struct btrfs_device *dev); | |
84 | int btrfs_verify_block_csum(struct btrfs_root *root, | |
85 | struct extent_buffer *buf); | |
86 | int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, | |
87 | int metadata); | |
88 | int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode, | |
89 | int rw, struct bio *bio, int mirror_num, | |
90 | unsigned long bio_flags, u64 bio_offset, | |
91 | extent_submit_bio_hook_t *submit_bio_start, | |
92 | extent_submit_bio_hook_t *submit_bio_done); | |
93 | ||
94 | int btrfs_congested_async(struct btrfs_fs_info *info, int iodone); | |
95 | unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info); | |
96 | int btrfs_write_tree_block(struct extent_buffer *buf); | |
97 | int btrfs_wait_tree_block_writeback(struct extent_buffer *buf); | |
98 | int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, | |
99 | struct btrfs_fs_info *fs_info); | |
100 | int btrfs_add_log_tree(struct btrfs_trans_handle *trans, | |
101 | struct btrfs_root *root); | |
102 | int btree_lock_page_hook(struct page *page); | |
103 | ||
104 | ||
105 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
106 | void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, int level); | |
107 | #else | |
108 | static inline void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, | |
109 | int level) | |
110 | { | |
111 | } | |
112 | #endif | |
113 | #endif |