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.
22 #include <linux/buffer_head.h>
24 #define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
26 enum btrfs_bh_state_bits
{
27 BH_Checked
= BH_PrivateStart
,
30 BUFFER_FNS(Checked
, checked
);
31 BUFFER_FNS(Defrag
, defrag
);
33 static inline struct btrfs_node
*btrfs_buffer_node(struct buffer_head
*bh
)
35 return (struct btrfs_node
*)bh
->b_data
;
38 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct buffer_head
*bh
)
40 return (struct btrfs_leaf
*)bh
->b_data
;
43 static inline struct btrfs_header
*btrfs_buffer_header(struct buffer_head
*bh
)
45 return &((struct btrfs_node
*)bh
->b_data
)->header
;
48 struct buffer_head
*read_tree_block(struct btrfs_root
*root
, u64 blocknr
);
49 int readahead_tree_block(struct btrfs_root
*root
, u64 blocknr
);
50 struct buffer_head
*btrfs_find_create_tree_block(struct btrfs_root
*root
,
52 int write_tree_block(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
53 struct buffer_head
*buf
);
54 int dirty_tree_block(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
55 struct buffer_head
*buf
);
56 int clean_tree_block(struct btrfs_trans_handle
*trans
,
57 struct btrfs_root
*root
, struct buffer_head
*buf
);
58 int btrfs_commit_transaction(struct btrfs_trans_handle
*trans
,
59 struct btrfs_root
*root
);
60 struct btrfs_root
*open_ctree(struct super_block
*sb
);
61 int close_ctree(struct btrfs_root
*root
);
62 void btrfs_block_release(struct btrfs_root
*root
, struct buffer_head
*buf
);
63 int write_ctree_super(struct btrfs_trans_handle
*trans
,
64 struct btrfs_root
*root
);
65 struct buffer_head
*btrfs_find_tree_block(struct btrfs_root
*root
, u64 blocknr
);
66 int btrfs_csum_data(struct btrfs_root
* root
, char *data
, size_t len
,
68 struct btrfs_root
*btrfs_read_fs_root(struct btrfs_fs_info
*fs_info
,
69 struct btrfs_key
*location
);
70 struct btrfs_root
*btrfs_read_fs_root_no_radix(struct btrfs_fs_info
*fs_info
,
71 struct btrfs_key
*location
);
72 u64
bh_blocknr(struct buffer_head
*bh
);
73 int btrfs_insert_dev_radix(struct btrfs_root
*root
,
74 struct block_device
*bdev
,
78 int btrfs_map_bh_to_logical(struct btrfs_root
*root
, struct buffer_head
*bh
,
80 int btrfs_releasepage(struct page
*page
, gfp_t flags
);
81 void btrfs_btree_balance_dirty(struct btrfs_root
*root
);
82 int btrfs_free_fs_root(struct btrfs_fs_info
*fs_info
, struct btrfs_root
*root
);
83 void btrfs_mark_buffer_dirty(struct buffer_head
*bh
);
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