freebsd-skq/usr.bin/mkimg/vtoc8.c
marcel 741bf1228e Avoid depending on the <sys/endian.h> header for le*enc and be*enc.
Not only is the header unportable, the encoding/decoding functions
are as well.  Instead, duplicate the handful of small inlines we
need into a private header called endian.h.

Aside: an alternative approach is to move the encoding/decoding
functions to a separate system header.  While the header is still
nonportable, such an approach would make it possible to re-use the
definitions by playing games with include paths. This may be the
preferred approach if more (build) utilities need this.  This
change does not preclude that.  In fact, it makes it easier.
2016-09-26 01:06:32 +00:00

119 lines
3.6 KiB
C

/*-
* Copyright (c) 2014 Juniper Networks, Inc.
* 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 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/vtoc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "endian.h"
#include "image.h"
#include "mkimg.h"
#include "scheme.h"
#ifndef VTOC_TAG_FREEBSD_NANDFS
#define VTOC_TAG_FREEBSD_NANDFS 0x0905
#endif
static struct mkimg_alias vtoc8_aliases[] = {
{ ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) },
{ ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_SWAP) },
{ ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_UFS) },
{ ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_VINUM) },
{ ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) },
{ ALIAS_NONE, 0 }
};
static lba_t
vtoc8_metadata(u_int where, lba_t blk)
{
blk += (where == SCHEME_META_IMG_START) ? 1 : 0;
return (round_cylinder(blk));
}
static int
vtoc8_write(lba_t imgsz, void *bootcode __unused)
{
struct vtoc8 vtoc8;
struct part *part;
u_char *p;
int error, n;
uint16_t ofs, sum;
imgsz = (lba_t)ncyls * nheads * nsecs;
memset(&vtoc8, 0, sizeof(vtoc8));
sprintf(vtoc8.ascii, "FreeBSD%lldM",
(long long)(imgsz * secsz / 1048576));
be32enc(&vtoc8.version, VTOC_VERSION);
be16enc(&vtoc8.nparts, VTOC8_NPARTS);
be32enc(&vtoc8.sanity, VTOC_SANITY);
be16enc(&vtoc8.rpm, 3600);
be16enc(&vtoc8.physcyls, ncyls);
be16enc(&vtoc8.ncyls, ncyls);
be16enc(&vtoc8.altcyls, 0);
be16enc(&vtoc8.nheads, nheads);
be16enc(&vtoc8.nsecs, nsecs);
be16enc(&vtoc8.magic, VTOC_MAGIC);
be32enc(&vtoc8.map[VTOC_RAW_PART].nblks, imgsz);
STAILQ_FOREACH(part, &partlist, link) {
n = part->index + ((part->index >= VTOC_RAW_PART) ? 1 : 0);
be16enc(&vtoc8.part[n].tag, ALIAS_TYPE2INT(part->type));
be32enc(&vtoc8.map[n].cyl, part->block / (nsecs * nheads));
be32enc(&vtoc8.map[n].nblks, part->size);
}
/* Calculate checksum. */
sum = 0;
p = (void *)&vtoc8;
for (ofs = 0; ofs < sizeof(vtoc8) - 2; ofs += 2)
sum ^= be16dec(p + ofs);
be16enc(&vtoc8.cksum, sum);
error = image_write(0, &vtoc8, 1);
return (error);
}
static struct mkimg_scheme vtoc8_scheme = {
.name = "vtoc8",
.description = "SMI VTOC8 disk labels",
.aliases = vtoc8_aliases,
.metadata = vtoc8_metadata,
.write = vtoc8_write,
.nparts = VTOC8_NPARTS - 1,
.maxsecsz = 512
};
SCHEME_DEFINE(vtoc8_scheme);