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,
29 BUFFER_FNS(Checked, checked);
31 static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh)
33 return (struct btrfs_node *)bh->b_data;
36 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct buffer_head *bh)
38 return (struct btrfs_leaf *)bh->b_data;
41 static inline struct btrfs_header *btrfs_buffer_header(struct buffer_head *bh)
43 return &((struct btrfs_node *)bh->b_data)->header;
46 struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr);
47 int readahead_tree_block(struct btrfs_root *root, u64 blocknr);
48 struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root,
50 int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
51 struct buffer_head *buf);
52 int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
53 struct buffer_head *buf);
54 int clean_tree_block(struct btrfs_trans_handle *trans,
55 struct btrfs_root *root, struct buffer_head *buf);
56 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
57 struct btrfs_root *root);
58 struct btrfs_root *open_ctree(struct super_block *sb);
59 int close_ctree(struct btrfs_root *root);
60 void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf);
61 int write_ctree_super(struct btrfs_trans_handle *trans,
62 struct btrfs_root *root);
63 struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr);
64 int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len,
66 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
67 struct btrfs_key *location);
68 struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info,
69 struct btrfs_key *location);
70 u64 bh_blocknr(struct buffer_head *bh);
71 int btrfs_insert_dev_radix(struct btrfs_root *root,
72 struct block_device *bdev,
76 int btrfs_map_bh_to_logical(struct btrfs_root *root, struct buffer_head *bh,
78 int btrfs_releasepage(struct page *page, gfp_t flags);
79 void btrfs_btree_balance_dirty(struct btrfs_root *root);
80 int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);