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);
43struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
44 u64 bytenr, u32 blocksize);
45int clean_tree_block(struct btrfs_trans_handle *trans,
46 struct btrfs_root *root, struct extent_buffer *buf);
47struct btrfs_root *open_ctree(struct super_block *sb,
48 struct btrfs_fs_devices *fs_devices,
49 char *options);
50int close_ctree(struct btrfs_root *root);
51int write_ctree_super(struct btrfs_trans_handle *trans,
52 struct btrfs_root *root, int max_mirrors);
53struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
54int btrfs_commit_super(struct btrfs_root *root);
55int btrfs_error_commit_super(struct btrfs_root *root);
56struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
57 u64 bytenr, u32 blocksize);
58struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
59 struct btrfs_key *location);
60struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
61 struct btrfs_key *location);
62int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
63void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
64void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
65int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
66void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
67int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
68int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
69int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
70u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
71void btrfs_csum_final(u32 crc, char *result);
72int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
73 int metadata);
74int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
75 int rw, struct bio *bio, int mirror_num,
76 unsigned long bio_flags, u64 bio_offset,
77 extent_submit_bio_hook_t *submit_bio_start,
78 extent_submit_bio_hook_t *submit_bio_done);
79unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
80int btrfs_write_tree_block(struct extent_buffer *buf);
81int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
82int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
83 struct btrfs_fs_info *fs_info);
84int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
85 struct btrfs_root *root);
86int btree_lock_page_hook(struct page *page);
87
88
89#ifdef CONFIG_DEBUG_LOCK_ALLOC
90void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, int level);
91#else
92static inline void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb,
93 int level)
94{
95}
96#endif
97#endif