/* $NetBSD: bswap.c,v 1.5 2016/01/31 18:57:29 christos Exp $ */
/*-
* Copyright (c) 2009 Izumi Tsutsui. All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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.
*/
/*
* Copyright (c) 1982, 1986, 1988 Regents of the University of California.
* All rights reserved.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
*/
#if !defined(NATIVELABEL_ONLY)
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <string.h>
#include <sys/types.h>
#if HAVE_NBTOOL_CONFIG_H
#include <nbinclude/sys/disklabel.h>
#else
#include <sys/disklabel.h>
#endif /* HAVE_NBTOOL_CONFIG_H */
#include "bswap.h"
#include "dkcksum.h"
static void
bswaplabel(struct disklabel *nlp, const struct disklabel *olp)
{
u_int i;
nlp->d_magic = bswap32(olp->d_magic);
nlp->d_type = bswap16(olp->d_type);
nlp->d_subtype = bswap16(olp->d_subtype);
/* no need to swap char strings */
memcpy(nlp->d_typename, olp->d_typename, sizeof(nlp->d_typename));
/* XXX What should we do for d_un (an union of char and pointers) ? */
memcpy(nlp->d_packname, olp->d_packname, sizeof(nlp->d_packname));
nlp->d_secsize = bswap32(olp->d_secsize);
nlp->d_nsectors = bswap32(olp->d_nsectors);
nlp->d_ntracks = bswap32(olp->d_ntracks);
nlp->d_ncylinders = bswap32(olp->d_ncylinders);
nlp->d_secpercyl = bswap32(olp->d_secpercyl);
nlp->d_secperunit = bswap32(olp->d_secperunit);
nlp->d_sparespertrack = bswap16(olp->d_sparespertrack);
nlp->d_sparespercyl = bswap16(olp->d_sparespercyl);
nlp->d_acylinders = bswap32(olp->d_acylinders);
nlp->d_rpm = bswap16(olp->d_rpm);
nlp->d_interleave = bswap16(olp->d_interleave);
nlp->d_trackskew = bswap16(olp->d_trackskew);
nlp->d_cylskew = bswap16(olp->d_cylskew);
nlp->d_headswitch = bswap32(olp->d_headswitch);
nlp->d_trkseek = bswap32(olp->d_trkseek);
nlp->d_flags = bswap32(olp->d_flags);
for (i = 0; i < NDDATA; i++)
nlp->d_drivedata[i] = bswap32(olp->d_drivedata[i]);
for (i = 0; i < NSPARE; i++)
nlp->d_spare[i] = bswap32(olp->d_spare[i]);
nlp->d_magic2 = bswap32(olp->d_magic2);
nlp->d_checksum = bswap16(olp->d_checksum);
/* filesystem and partition information: */
nlp->d_npartitions = bswap16(olp->d_npartitions);
nlp->d_bbsize = bswap32(olp->d_bbsize);
nlp->d_sbsize = bswap32(olp->d_sbsize);
for (i = 0; i < maxpartitions; i++) {
nlp->d_partitions[i].p_size =
bswap32(olp->d_partitions[i].p_size);
nlp->d_partitions[i].p_offset =
bswap32(olp->d_partitions[i].p_offset);
nlp->d_partitions[i].p_fsize =
bswap32(olp->d_partitions[i].p_fsize);
/* p_fstype and p_frag is uint8_t, so no need to swap */
nlp->d_partitions[i].p_fstype = olp->d_partitions[i].p_fstype;
nlp->d_partitions[i].p_frag = olp->d_partitions[i].p_frag;
nlp->d_partitions[i].p_cpg =
bswap16(olp->d_partitions[i].p_cpg);
}
}
void
targettohlabel(struct disklabel *hlp, const struct disklabel *tlp)
{
if (bswap32(tlp->d_magic) == DISKMAGIC)
bswaplabel(hlp, tlp);
else
*hlp = *tlp;
/* update checksum in host endian */
hlp->d_checksum = 0;
hlp->d_checksum = dkcksum(hlp);
}
void
htotargetlabel(struct disklabel *tlp, const struct disklabel *hlp)
{
if (bswap_p)
bswaplabel(tlp, hlp);
else
*tlp = *hlp;
/* update checksum in target endian */
tlp->d_checksum = 0;
tlp->d_checksum = dkcksum_target(tlp);
}
uint16_t
dkcksum_target(struct disklabel *lp)
{
uint16_t npartitions;
if (lp->d_magic == DISKMAGIC)
npartitions = lp->d_npartitions;
else if (bswap32(lp->d_magic) == DISKMAGIC)
npartitions = bswap16(lp->d_npartitions);
else
npartitions = 0;
if (npartitions > maxpartitions)
npartitions = 0;
return dkcksum_sized(lp, npartitions);
}
#endif /* !NATIVELABEL_ONLY */