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/*
* 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 1991-1997,2002 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
#include <stdio.h>
#include <errno.h>
#include <memory.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/dkio.h>
#include <sys/vtoc.h>
/*
* Read VTOC - return partition number.
*/
int
read_vtoc(int fd, struct vtoc *vtoc)
{
struct dk_cinfo dki_info;
/*
* Read the vtoc.
*/
if (ioctl(fd, DKIOCGVTOC, (caddr_t)vtoc) == -1) {
switch (errno) {
case EIO:
return (VT_EIO);
case EINVAL:
return (VT_EINVAL);
/* for disks > 1TB */
case ENOTSUP:
return (VT_ENOTSUP);
default:
return (VT_ERROR);
}
}
/*
* Sanity-check the vtoc.
*/
if (vtoc->v_sanity != VTOC_SANE) {
return (VT_EINVAL);
}
/*
* Convert older-style vtoc's.
*/
switch (vtoc->v_version) {
case 0:
/*
* No vtoc information. Install default
* nparts/sectorsz and version. We are
* assuming that the driver returns the
* current partition information correctly.
*/
vtoc->v_version = V_VERSION;
if (vtoc->v_nparts == 0)
vtoc->v_nparts = V_NUMPAR;
if (vtoc->v_sectorsz == 0)
vtoc->v_sectorsz = DEV_BSIZE;
break;
case V_VERSION:
break;
default:
return (VT_EINVAL);
}
/*
* Return partition number for this file descriptor.
*/
if (ioctl(fd, DKIOCINFO, (caddr_t)&dki_info) == -1) {
switch (errno) {
case EIO:
return (VT_EIO);
case EINVAL:
return (VT_EINVAL);
default:
return (VT_ERROR);
}
}
if (dki_info.dki_partition > V_NUMPAR) {
return (VT_EINVAL);
}
return ((int)dki_info.dki_partition);
}
/*
* Write VTOC
*/
int
write_vtoc(int fd, struct vtoc *vtoc)
{
int i;
/*
* Sanity-check the vtoc
*/
if (vtoc->v_sanity != VTOC_SANE || vtoc->v_nparts > V_NUMPAR) {
return (-1);
}
/*
* since many drivers won't allow opening a device make sure
* all partitions aren't being set to zero. If all are zero then
* we have no way to set them to something else
*/
for (i = 0; i < (int)vtoc->v_nparts; i++)
if (vtoc->v_part[i].p_size > 0)
break;
if (i == (int)vtoc->v_nparts)
return (-1);
/*
* Write the vtoc
*/
if (ioctl(fd, DKIOCSVTOC, (caddr_t)vtoc) == -1) {
switch (errno) {
case EIO:
return (VT_EIO);
case EINVAL:
return (VT_EINVAL);
/* for disks > 1TB */
case ENOTSUP:
return (VT_ENOTSUP);
default:
return (VT_ERROR);
}
}
return (0);
}
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