186 lines
6.4 KiB
C
186 lines
6.4 KiB
C
/* $NetBSD: bswap.c,v 1.5 2016/01/31 18:57:29 christos Exp $ */
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/*-
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* Copyright (c) 2009 Izumi Tsutsui. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1988 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
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*/
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#if !defined(NATIVELABEL_ONLY)
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <string.h>
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#include <sys/types.h>
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#if HAVE_NBTOOL_CONFIG_H
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#include <nbinclude/sys/disklabel.h>
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#else
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#include <sys/disklabel.h>
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#endif /* HAVE_NBTOOL_CONFIG_H */
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#include "bswap.h"
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#include "dkcksum.h"
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static void
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bswaplabel(struct disklabel *nlp, const struct disklabel *olp)
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{
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u_int i;
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nlp->d_magic = bswap32(olp->d_magic);
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nlp->d_type = bswap16(olp->d_type);
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nlp->d_subtype = bswap16(olp->d_subtype);
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/* no need to swap char strings */
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memcpy(nlp->d_typename, olp->d_typename, sizeof(nlp->d_typename));
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/* XXX What should we do for d_un (an union of char and pointers) ? */
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memcpy(nlp->d_packname, olp->d_packname, sizeof(nlp->d_packname));
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nlp->d_secsize = bswap32(olp->d_secsize);
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nlp->d_nsectors = bswap32(olp->d_nsectors);
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nlp->d_ntracks = bswap32(olp->d_ntracks);
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nlp->d_ncylinders = bswap32(olp->d_ncylinders);
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nlp->d_secpercyl = bswap32(olp->d_secpercyl);
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nlp->d_secperunit = bswap32(olp->d_secperunit);
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nlp->d_sparespertrack = bswap16(olp->d_sparespertrack);
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nlp->d_sparespercyl = bswap16(olp->d_sparespercyl);
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nlp->d_acylinders = bswap32(olp->d_acylinders);
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nlp->d_rpm = bswap16(olp->d_rpm);
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nlp->d_interleave = bswap16(olp->d_interleave);
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nlp->d_trackskew = bswap16(olp->d_trackskew);
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nlp->d_cylskew = bswap16(olp->d_cylskew);
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nlp->d_headswitch = bswap32(olp->d_headswitch);
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nlp->d_trkseek = bswap32(olp->d_trkseek);
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nlp->d_flags = bswap32(olp->d_flags);
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for (i = 0; i < NDDATA; i++)
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nlp->d_drivedata[i] = bswap32(olp->d_drivedata[i]);
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for (i = 0; i < NSPARE; i++)
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nlp->d_spare[i] = bswap32(olp->d_spare[i]);
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nlp->d_magic2 = bswap32(olp->d_magic2);
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nlp->d_checksum = bswap16(olp->d_checksum);
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/* filesystem and partition information: */
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nlp->d_npartitions = bswap16(olp->d_npartitions);
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nlp->d_bbsize = bswap32(olp->d_bbsize);
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nlp->d_sbsize = bswap32(olp->d_sbsize);
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for (i = 0; i < maxpartitions; i++) {
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nlp->d_partitions[i].p_size =
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bswap32(olp->d_partitions[i].p_size);
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nlp->d_partitions[i].p_offset =
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bswap32(olp->d_partitions[i].p_offset);
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nlp->d_partitions[i].p_fsize =
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bswap32(olp->d_partitions[i].p_fsize);
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/* p_fstype and p_frag is uint8_t, so no need to swap */
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nlp->d_partitions[i].p_fstype = olp->d_partitions[i].p_fstype;
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nlp->d_partitions[i].p_frag = olp->d_partitions[i].p_frag;
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nlp->d_partitions[i].p_cpg =
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bswap16(olp->d_partitions[i].p_cpg);
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}
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}
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void
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targettohlabel(struct disklabel *hlp, const struct disklabel *tlp)
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{
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if (bswap32(tlp->d_magic) == DISKMAGIC)
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bswaplabel(hlp, tlp);
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else
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*hlp = *tlp;
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/* update checksum in host endian */
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hlp->d_checksum = 0;
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hlp->d_checksum = dkcksum(hlp);
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}
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void
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htotargetlabel(struct disklabel *tlp, const struct disklabel *hlp)
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{
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if (bswap_p)
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bswaplabel(tlp, hlp);
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else
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*tlp = *hlp;
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/* update checksum in target endian */
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tlp->d_checksum = 0;
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tlp->d_checksum = dkcksum_target(tlp);
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}
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uint16_t
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dkcksum_target(struct disklabel *lp)
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{
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uint16_t npartitions;
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if (lp->d_magic == DISKMAGIC)
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npartitions = lp->d_npartitions;
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else if (bswap32(lp->d_magic) == DISKMAGIC)
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npartitions = bswap16(lp->d_npartitions);
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else
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npartitions = 0;
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if (npartitions > maxpartitions)
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npartitions = 0;
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return dkcksum_sized(lp, npartitions);
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}
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#endif /* !NATIVELABEL_ONLY */
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