/*
* 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
*/
/*
* from sh3/disksubr.c and kern/subr_disk_mbr.c with modifications:
* - update d_checksum properly
* - replace memcpy(9) by memmove(9) as a precaution
* - avoid memmove(9) for libkern version, check if the labels
* are the same and skip copying in-place.
*/
void
disklabel_swap(struct disklabel *nlp, struct disklabel *olp)
{
int i;
uint16_t npartitions;
SWAP32(d_magic);
SWAP16(d_type);
SWAP16(d_subtype);
if (nlp != olp) {
/* Do not 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));
}
SWAP16(d_rpm);
SWAP16(d_interleave);
SWAP16(d_trackskew);
SWAP16(d_cylskew);
SWAP32(d_headswitch);
SWAP32(d_trkseek);
SWAP32(d_flags);
for (i = 0; i < NDDATA; i++)
SWAP32(d_drivedata[i]);
for (i = 0; i < NSPARE; i++)
SWAP32(d_spare[i]);
SWAP32(d_magic2);
/* d_checksum is updated later. */
SWAP16(d_npartitions);
SWAP32(d_bbsize);
SWAP32(d_sbsize);
for (i = 0; i < MAXPARTITIONS; i++) {
SWAP32(d_partitions[i].p_size);
SWAP32(d_partitions[i].p_offset);
SWAP32(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;
SWAP16(d_partitions[i].p_cpg);
}
#undef SWAP16
#undef SWAP32
/* Update checksum in the target endian. */
nlp->d_checksum = 0;
npartitions = nlp->d_magic == DISKMAGIC ?
nlp->d_npartitions : olp->d_npartitions;
/*
* npartitions can be larger than MAXPARTITIONS when the label was not
* validated by setdisklabel. If so, the label is intentionally(?)
* corrupted and checksum should be meaningless.
*/
if (npartitions <= MAXPARTITIONS)
nlp->d_checksum = dkcksum_sized(nlp, npartitions);
}
#endif /* DISKLABEL_EI || LIBSA_DISKLABEL_EI */
