OMAP3: PM: move context-loss counting into OMAP PM
[linux-ginger.git] / fs / btrfs / disk-io.h
blobc958ecbc19168ef0e7ef8e7bdd123f5f527b55f7
1 /*
2 * Copyright (C) 2007 Oracle. All rights reserved.
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.
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.
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.
19 #ifndef __DISKIO__
20 #define __DISKIO__
22 #define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
23 #define BTRFS_SUPER_INFO_SIZE 4096
25 #define BTRFS_SUPER_MIRROR_MAX 3
26 #define BTRFS_SUPER_MIRROR_SHIFT 12
28 static inline u64 btrfs_sb_offset(int mirror)
30 u64 start = 16 * 1024;
31 if (mirror)
32 return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror);
33 return BTRFS_SUPER_INFO_OFFSET;
36 struct btrfs_device;
37 struct btrfs_fs_devices;
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,
91 extent_submit_bio_hook_t *submit_bio_start,
92 extent_submit_bio_hook_t *submit_bio_done);
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_free_log_root_tree(struct btrfs_trans_handle *trans,
99 struct btrfs_fs_info *fs_info);
100 int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
101 struct btrfs_fs_info *fs_info);
102 int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
103 struct btrfs_root *root);
104 int btree_lock_page_hook(struct page *page);
107 #ifdef CONFIG_DEBUG_LOCK_ALLOC
108 void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, int level);
109 #else
110 static inline void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb,
111 int level)
114 #endif
115 #endif