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/*
* Copyright (C) 2007 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef __DISKIO__
#define __DISKIO__
#include <linux/buffer_head.h>
#define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
enum btrfs_bh_state_bits {
BH_Checked = BH_PrivateStart,
};
BUFFER_FNS(Checked, checked);
static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh)
{
return (struct btrfs_node *)bh->b_data;
}
static inline struct btrfs_leaf *btrfs_buffer_leaf(struct buffer_head *bh)
{
return (struct btrfs_leaf *)bh->b_data;
}
static inline struct btrfs_header *btrfs_buffer_header(struct buffer_head *bh)
{
return &((struct btrfs_node *)bh->b_data)->header;
}
struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr);
int readahead_tree_block(struct btrfs_root *root, u64 blocknr);
struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root,
u64 blocknr);
int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct buffer_head *buf);
int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct buffer_head *buf);
int clean_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct buffer_head *buf);
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct btrfs_root *open_ctree(struct super_block *sb);
int close_ctree(struct btrfs_root *root);
void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf);
int write_ctree_super(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr);
int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len,
char *result);
struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
struct btrfs_key *location);
struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info,
struct btrfs_key *location);
u64 bh_blocknr(struct buffer_head *bh);
int btrfs_insert_dev_radix(struct btrfs_root *root,
struct block_device *bdev,
u64 device_id,
u64 block_start,
u64 num_blocks);
int btrfs_map_bh_to_logical(struct btrfs_root *root, struct buffer_head *bh,
u64 logical);
int btrfs_releasepage(struct page *page, gfp_t flags);
void btrfs_btree_balance_dirty(struct btrfs_root *root);
int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
#endif
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