/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Manuel Bouyer.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Read disk label from the device.
*/
int
wdgetdisklabel(struct wd_softc *wd)
{
struct mbr_sector *mbr;
struct mbr_partition *mp;
struct disklabel *lp;
size_t rsize;
int sector, i;
char *msg;
uint8_t buf[DEV_BSIZE];
wdgetdefaultlabel(wd, &wd->sc_label);
/*
* Find NetBSD Partition in DOS partition table.
*/
sector = 0;
if (wdstrategy(wd, F_READ, MBR_BBSECTOR, DEV_BSIZE, buf, &rsize))
return EOFFSET;
mbr = (struct mbr_sector *)buf;
if (mbr->mbr_magic == htole16(MBR_MAGIC)) {
/*
* Lookup NetBSD slice. If there is none, go ahead
* and try to read the disklabel off sector #0.
*/
mp = mbr->mbr_parts;
for (i = 0; i < MBR_PART_COUNT; i++) {
if (mp[i].mbrp_type == MBR_PTYPE_NETBSD) {
sector = le32toh(mp[i].mbrp_start);
break;
}
}
}