iob.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1990-1994, by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* This struct keeps track of an open file in the standalone I/O system.
*
* It includes an IOB for device addess, a buffer for reading directory blocks
* and a structure for volume.
*/
struct iob {
void *i_si; /* I/O handle for this file */
struct {
off_t si_offset; /* byte offset */
char *si_ma; /* memory address to r/w */
int si_cc; /* character count to r/w */
int si_bn; /* block number to r/w */
} i_saio;
struct inode i_ino; /* Buffer for inode information */
struct hs_volume ui_hsfs; /* Superblock for file system */
char i_buf[MAXBSIZE]; /* Buffer for reading dirs */
};
#define i_offset i_saio.si_offset
#define i_bn i_saio.si_bn
#define i_ma i_saio.si_ma
#define i_cc i_saio.si_cc