1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * ocfs2_buffer_head.h 5 * 6 * Buffer cache handling functions defined 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #ifndef OCFS2_BUFFER_HEAD_IO_H 27 #define OCFS2_BUFFER_HEAD_IO_H 28 29 #include <linux/buffer_head.h> 30 31 void ocfs2_end_buffer_io_sync(struct buffer_head *bh, 32 int uptodate); 33 34 static inline int ocfs2_read_block(struct inode *inode, 35 u64 off, 36 struct buffer_head **bh); 37 38 int ocfs2_write_block(struct ocfs2_super *osb, 39 struct buffer_head *bh, 40 struct inode *inode); 41 int ocfs2_read_blocks(struct inode *inode, 42 u64 block, 43 int nr, 44 struct buffer_head *bhs[], 45 int flags); 46 int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block, 47 unsigned int nr, struct buffer_head *bhs[]); 48 49 int ocfs2_write_super_or_backup(struct ocfs2_super *osb, 50 struct buffer_head *bh); 51 52 #define OCFS2_BH_IGNORE_CACHE 1 53 #define OCFS2_BH_READAHEAD 8 54 55 static inline int ocfs2_read_block(struct inode *inode, u64 off, 56 struct buffer_head **bh) 57 { 58 int status = 0; 59 60 if (bh == NULL) { 61 printk("ocfs2: bh == NULL\n"); 62 status = -EINVAL; 63 goto bail; 64 } 65 66 status = ocfs2_read_blocks(inode, off, 1, bh, 0); 67 68 bail: 69 return status; 70 } 71 72 #endif /* OCFS2_BUFFER_HEAD_IO_H */ 73