| /* |
| * 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); |
| 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); |
| #endif |