1*ccd979bdSMark Fasheh /* -*- mode: c; c-basic-offset: 8; -*- 2*ccd979bdSMark Fasheh * vim: noexpandtab sw=8 ts=8 sts=0: 3*ccd979bdSMark Fasheh * 4*ccd979bdSMark Fasheh * ocfs2_buffer_head.h 5*ccd979bdSMark Fasheh * 6*ccd979bdSMark Fasheh * Buffer cache handling functions defined 7*ccd979bdSMark Fasheh * 8*ccd979bdSMark Fasheh * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9*ccd979bdSMark Fasheh * 10*ccd979bdSMark Fasheh * This program is free software; you can redistribute it and/or 11*ccd979bdSMark Fasheh * modify it under the terms of the GNU General Public 12*ccd979bdSMark Fasheh * License as published by the Free Software Foundation; either 13*ccd979bdSMark Fasheh * version 2 of the License, or (at your option) any later version. 14*ccd979bdSMark Fasheh * 15*ccd979bdSMark Fasheh * This program is distributed in the hope that it will be useful, 16*ccd979bdSMark Fasheh * but WITHOUT ANY WARRANTY; without even the implied warranty of 17*ccd979bdSMark Fasheh * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18*ccd979bdSMark Fasheh * General Public License for more details. 19*ccd979bdSMark Fasheh * 20*ccd979bdSMark Fasheh * You should have received a copy of the GNU General Public 21*ccd979bdSMark Fasheh * License along with this program; if not, write to the 22*ccd979bdSMark Fasheh * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23*ccd979bdSMark Fasheh * Boston, MA 021110-1307, USA. 24*ccd979bdSMark Fasheh */ 25*ccd979bdSMark Fasheh 26*ccd979bdSMark Fasheh #ifndef OCFS2_BUFFER_HEAD_IO_H 27*ccd979bdSMark Fasheh #define OCFS2_BUFFER_HEAD_IO_H 28*ccd979bdSMark Fasheh 29*ccd979bdSMark Fasheh #include <linux/buffer_head.h> 30*ccd979bdSMark Fasheh 31*ccd979bdSMark Fasheh void ocfs2_end_buffer_io_sync(struct buffer_head *bh, 32*ccd979bdSMark Fasheh int uptodate); 33*ccd979bdSMark Fasheh 34*ccd979bdSMark Fasheh static inline int ocfs2_read_block(struct ocfs2_super *osb, 35*ccd979bdSMark Fasheh u64 off, 36*ccd979bdSMark Fasheh struct buffer_head **bh, 37*ccd979bdSMark Fasheh int flags, 38*ccd979bdSMark Fasheh struct inode *inode); 39*ccd979bdSMark Fasheh 40*ccd979bdSMark Fasheh int ocfs2_write_block(struct ocfs2_super *osb, 41*ccd979bdSMark Fasheh struct buffer_head *bh, 42*ccd979bdSMark Fasheh struct inode *inode); 43*ccd979bdSMark Fasheh int ocfs2_read_blocks(struct ocfs2_super *osb, 44*ccd979bdSMark Fasheh u64 block, 45*ccd979bdSMark Fasheh int nr, 46*ccd979bdSMark Fasheh struct buffer_head *bhs[], 47*ccd979bdSMark Fasheh int flags, 48*ccd979bdSMark Fasheh struct inode *inode); 49*ccd979bdSMark Fasheh 50*ccd979bdSMark Fasheh 51*ccd979bdSMark Fasheh #define OCFS2_BH_CACHED 1 52*ccd979bdSMark Fasheh #define OCFS2_BH_READAHEAD 8 /* use this to pass READA down to submit_bh */ 53*ccd979bdSMark Fasheh 54*ccd979bdSMark Fasheh static inline int ocfs2_read_block(struct ocfs2_super * osb, u64 off, 55*ccd979bdSMark Fasheh struct buffer_head **bh, int flags, 56*ccd979bdSMark Fasheh struct inode *inode) 57*ccd979bdSMark Fasheh { 58*ccd979bdSMark Fasheh int status = 0; 59*ccd979bdSMark Fasheh 60*ccd979bdSMark Fasheh if (bh == NULL) { 61*ccd979bdSMark Fasheh printk("ocfs2: bh == NULL\n"); 62*ccd979bdSMark Fasheh status = -EINVAL; 63*ccd979bdSMark Fasheh goto bail; 64*ccd979bdSMark Fasheh } 65*ccd979bdSMark Fasheh 66*ccd979bdSMark Fasheh status = ocfs2_read_blocks(osb, off, 1, bh, 67*ccd979bdSMark Fasheh flags, inode); 68*ccd979bdSMark Fasheh 69*ccd979bdSMark Fasheh bail: 70*ccd979bdSMark Fasheh return status; 71*ccd979bdSMark Fasheh } 72*ccd979bdSMark Fasheh 73*ccd979bdSMark Fasheh #endif /* OCFS2_BUFFER_HEAD_IO_H */ 74