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
btrfs_sb_offset(int mirror)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 int 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 #ifdef CONFIG_DEBUG_LOCK_ALLOC
90 void btrfs_init_lockdep(void);
91 void btrfs_set_buffer_lockdep_class(u64 objectid,
92 struct extent_buffer *eb, int level);
93 #else
btrfs_init_lockdep(void)94 static inline void btrfs_init_lockdep(void)
95 { }
btrfs_set_buffer_lockdep_class(u64 objectid,struct extent_buffer * eb,int level)96 static inline void btrfs_set_buffer_lockdep_class(u64 objectid,
97 struct extent_buffer *eb, int level)
98 {
99 }
100 #endif
101 #endif
102