btrfs-progs/disk-io.h

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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.
*/
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#ifndef __DISKIO__
#define __DISKIO__
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#include "list.h"
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struct btrfs_buffer {
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u64 blocknr;
u64 dev_blocknr;
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int count;
int fd;
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struct list_head dirty;
struct list_head cache;
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union {
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struct btrfs_node node;
struct btrfs_leaf leaf;
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};
};
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struct btrfs_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr);
struct btrfs_buffer *find_tree_block(struct btrfs_root *root, u64 blocknr);
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int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_buffer *buf);
int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_buffer *buf);
int clean_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_buffer *buf);
int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_super_block *s);
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struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *s);
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struct btrfs_root *open_ctree_fd(int fp, struct btrfs_super_block *super);
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int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s);
void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf);
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int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_super_block *s);
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int btrfs_map_bh_to_logical(struct btrfs_root *root, struct btrfs_buffer *bh,
u64 logical);
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#define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
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#endif