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da1e90985a
The ocfs2_read_blocks() function currently handles sync reads, cached, reads, and sometimes cached reads. We're going to add some functionality to it, so first we should simplify it. The uncached, synchronous reads are much easer to handle as a separate function, so we instroduce ocfs2_read_blocks_sync(). Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* ocfs2_buffer_head.h
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*
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* Buffer cache handling functions defined
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*
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* Copyright (C) 2002, 2004 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 as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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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 OCFS2_BUFFER_HEAD_IO_H
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#define OCFS2_BUFFER_HEAD_IO_H
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#include <linux/buffer_head.h>
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void ocfs2_end_buffer_io_sync(struct buffer_head *bh,
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int uptodate);
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static inline int ocfs2_read_block(struct ocfs2_super *osb,
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u64 off,
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struct buffer_head **bh,
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int flags,
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struct inode *inode);
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int ocfs2_write_block(struct ocfs2_super *osb,
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struct buffer_head *bh,
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struct inode *inode);
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int ocfs2_read_blocks(struct ocfs2_super *osb,
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u64 block,
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int nr,
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struct buffer_head *bhs[],
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int flags,
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struct inode *inode);
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int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
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unsigned int nr, struct buffer_head *bhs[]);
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int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
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struct buffer_head *bh);
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#define OCFS2_BH_CACHED 1
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#define OCFS2_BH_READAHEAD 8
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static inline int ocfs2_read_block(struct ocfs2_super * osb, u64 off,
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struct buffer_head **bh, int flags,
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struct inode *inode)
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{
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int status = 0;
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if (bh == NULL) {
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printk("ocfs2: bh == NULL\n");
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status = -EINVAL;
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goto bail;
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}
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status = ocfs2_read_blocks(osb, off, 1, bh,
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flags, inode);
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bail:
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return status;
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}
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#endif /* OCFS2_BUFFER_HEAD_IO_H */
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