tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
28static 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
36struct btrfs_device;
37struct btrfs_fs_devices;
38
39struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
40 u32 blocksize, u64 parent_transid);
41int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
42 u64 parent_transid);
43int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
44 int mirror_num, struct extent_buffer **eb);
45struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
46 u64 bytenr, u32 blocksize);
47void clean_tree_block(struct btrfs_trans_handle *trans,
48 struct btrfs_root *root, struct extent_buffer *buf);
49int open_ctree(struct super_block *sb,
50 struct btrfs_fs_devices *fs_devices,
51 char *options);
52int close_ctree(struct btrfs_root *root);
53int write_ctree_super(struct btrfs_trans_handle *trans,
54 struct btrfs_root *root, int max_mirrors);
55struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
56int btrfs_commit_super(struct btrfs_root *root);
57void btrfs_error_commit_super(struct btrfs_root *root);
58struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
59 u64 bytenr, u32 blocksize);
60struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
61 struct btrfs_key *location);
62struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
63 struct btrfs_key *location);
64int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
65void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
66void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
67void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
68void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
69int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
70 int atomic);
71int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
72int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
73u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
74void btrfs_csum_final(u32 crc, char *result);
75int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
76 int metadata);
77int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
78 int rw, struct bio *bio, int mirror_num,
79 unsigned long bio_flags, u64 bio_offset,
80 extent_submit_bio_hook_t *submit_bio_start,
81 extent_submit_bio_hook_t *submit_bio_done);
82unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
83int btrfs_write_tree_block(struct extent_buffer *buf);
84int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
85int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
86 struct btrfs_fs_info *fs_info);
87int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
88 struct btrfs_root *root);
89int btrfs_cleanup_transaction(struct btrfs_root *root);
90void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
91 struct btrfs_root *root);
92void btrfs_abort_devices(struct btrfs_root *root);
93struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
94 struct btrfs_fs_info *fs_info,
95 u64 objectid);
96int btree_lock_page_hook(struct page *page, void *data,
97 void (*flush_fn)(void *));
98
99#ifdef CONFIG_DEBUG_LOCK_ALLOC
100void btrfs_init_lockdep(void);
101void btrfs_set_buffer_lockdep_class(u64 objectid,
102 struct extent_buffer *eb, int level);
103#else
104static inline void btrfs_init_lockdep(void)
105{ }
106static inline void btrfs_set_buffer_lockdep_class(u64 objectid,
107 struct extent_buffer *eb, int level)
108{
109}
110#endif
111#endif