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6cbd5570 CM |
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 | ||
eb60ceac CM |
19 | #ifndef __DISKIO__ |
20 | #define __DISKIO__ | |
21 | ||
e20d96d6 | 22 | #include <linux/buffer_head.h> |
eb60ceac | 23 | |
e20d96d6 CM |
24 | #define BTRFS_SUPER_INFO_OFFSET (16 * 1024) |
25 | ||
090d1875 CM |
26 | enum btrfs_bh_state_bits { |
27 | BH_Checked = BH_PrivateStart, | |
f2183bde | 28 | BH_Defrag, |
86479a04 | 29 | BH_DefragDone, |
090d1875 CM |
30 | }; |
31 | BUFFER_FNS(Checked, checked); | |
f2183bde | 32 | BUFFER_FNS(Defrag, defrag); |
86479a04 | 33 | BUFFER_FNS(DefragDone, defrag_done); |
090d1875 | 34 | |
e20d96d6 CM |
35 | static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh) |
36 | { | |
37 | return (struct btrfs_node *)bh->b_data; | |
38 | } | |
39 | ||
40 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct buffer_head *bh) | |
41 | { | |
42 | return (struct btrfs_leaf *)bh->b_data; | |
43 | } | |
44 | ||
45 | static inline struct btrfs_header *btrfs_buffer_header(struct buffer_head *bh) | |
46 | { | |
47 | return &((struct btrfs_node *)bh->b_data)->header; | |
48 | } | |
49 | ||
50 | struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr); | |
090d1875 | 51 | int readahead_tree_block(struct btrfs_root *root, u64 blocknr); |
d98237b3 CM |
52 | struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root, |
53 | u64 blocknr); | |
e089f05c | 54 | int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
e20d96d6 | 55 | struct buffer_head *buf); |
e089f05c | 56 | int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
e20d96d6 | 57 | struct buffer_head *buf); |
e089f05c | 58 | int clean_tree_block(struct btrfs_trans_handle *trans, |
e20d96d6 | 59 | struct btrfs_root *root, struct buffer_head *buf); |
79154b1b CM |
60 | int btrfs_commit_transaction(struct btrfs_trans_handle *trans, |
61 | struct btrfs_root *root); | |
2c90e5d6 | 62 | struct btrfs_root *open_ctree(struct super_block *sb); |
e20d96d6 CM |
63 | int close_ctree(struct btrfs_root *root); |
64 | void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf); | |
79154b1b CM |
65 | int write_ctree_super(struct btrfs_trans_handle *trans, |
66 | struct btrfs_root *root); | |
d98237b3 | 67 | struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr); |
f254e52c CM |
68 | int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len, |
69 | char *result); | |
0f7d52f4 | 70 | struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, |
58176a96 JB |
71 | struct btrfs_key *location, |
72 | const char *name, int namelen); | |
5eda7b5e CM |
73 | struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info, |
74 | struct btrfs_key *location); | |
7eccb903 | 75 | u64 bh_blocknr(struct buffer_head *bh); |
8352d8a4 CM |
76 | int btrfs_insert_dev_radix(struct btrfs_root *root, |
77 | struct block_device *bdev, | |
b4100d64 | 78 | u64 device_id, |
8352d8a4 CM |
79 | u64 block_start, |
80 | u64 num_blocks); | |
81 | int btrfs_map_bh_to_logical(struct btrfs_root *root, struct buffer_head *bh, | |
82 | u64 logical); | |
d3c2fdcf | 83 | void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); |
5eda7b5e | 84 | int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); |
ccd467d6 | 85 | void btrfs_mark_buffer_dirty(struct buffer_head *bh); |
eb60ceac | 86 | #endif |