/* $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 */
