/* * 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 "list.h" struct btrfs_buffer { u64 blocknr; u64 dev_blocknr; u32 size; int count; int fd; struct list_head dirty; struct list_head cache; union { struct btrfs_node node; struct btrfs_leaf leaf; }; }; struct btrfs_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr); struct btrfs_buffer *find_tree_block(struct btrfs_root *root, u64 blocknr); 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); struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *s); struct btrfs_root *open_ctree_fd(int fp, struct btrfs_super_block *super); int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s); void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf); int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_super_block *s); int btrfs_map_bh_to_logical(struct btrfs_root *root, struct btrfs_buffer *bh, u64 logical); int btrfs_csum_super(struct btrfs_root *root, struct btrfs_super_block *super); int btrfs_csum_node(struct btrfs_root *root, struct btrfs_node *node); #define BTRFS_SUPER_INFO_OFFSET (16 * 1024) #endif