/* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * ocfs2_buffer_head.h * * Buffer cache handling functions defined * * Copyright (C) 2002, 2004 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 as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * 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 OCFS2_BUFFER_HEAD_IO_H #define OCFS2_BUFFER_HEAD_IO_H #include <linux/buffer_head.h> void ocfs2_end_buffer_io_sync(struct buffer_head *bh, int uptodate); int ocfs2_write_block(struct ocfs2_super *osb, struct buffer_head *bh, struct inode *inode); int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block, unsigned int nr, struct buffer_head *bhs[]); /* * If not NULL, validate() will be called on a buffer that is freshly * read from disk. It will not be called if the buffer was in cache. * Note that if validate() is being used for this buffer, it needs to * be set even for a READAHEAD call, as it marks the buffer for later * validation. */ int ocfs2_read_blocks(struct inode *inode, u64 block, int nr, struct buffer_head *bhs[], int flags, int (*validate)(struct super_block *sb, struct buffer_head *bh)); int ocfs2_write_super_or_backup(struct ocfs2_super *osb, struct buffer_head *bh); #define OCFS2_BH_IGNORE_CACHE 1 #define OCFS2_BH_READAHEAD 8 static inline int ocfs2_read_block(struct inode *inode, u64 off, struct buffer_head **bh, int (*validate)(struct super_block *sb, struct buffer_head *bh)) { int status = 0; if (bh == NULL) { printk("ocfs2: bh == NULL\n"); status = -EINVAL; goto bail; } status = ocfs2_read_blocks(inode, off, 1, bh, 0, validate); bail: return status; } #endif /* OCFS2_BUFFER_HEAD_IO_H */