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