1d6c278537
For now, put 0xff in each field. This needs to be revisited when we have proper geometry. Note that even without proper CHS values, it's already accepted by the kernel.
129 lines
3.5 KiB
C
129 lines
3.5 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/diskmbr.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "mkimg.h"
|
|
#include "scheme.h"
|
|
|
|
static struct mkimg_alias ebr_aliases[] = {
|
|
{ ALIAS_FAT32, ALIAS_INT2TYPE(DOSPTYP_FAT32) },
|
|
{ ALIAS_FREEBSD, ALIAS_INT2TYPE(DOSPTYP_386BSD) },
|
|
{ ALIAS_NONE, 0 }
|
|
};
|
|
|
|
static u_int
|
|
ebr_metadata(u_int where)
|
|
{
|
|
u_int secs;
|
|
|
|
secs = (where == SCHEME_META_PART_BEFORE) ? 1 : 0;
|
|
return (secs);
|
|
}
|
|
|
|
static void
|
|
ebr_chs(u_char *cyl, u_char *hd, u_char *sec, uint32_t lba __unused)
|
|
{
|
|
|
|
*cyl = 0xff; /* XXX */
|
|
*hd = 0xff; /* XXX */
|
|
*sec = 0xff; /* XXX */
|
|
}
|
|
|
|
static int
|
|
ebr_write(int fd, lba_t imgsz __unused, void *bootcode __unused)
|
|
{
|
|
u_char *ebr;
|
|
struct dos_partition *dp;
|
|
struct part *part, *next;
|
|
lba_t block, trksz;
|
|
int error;
|
|
|
|
ebr = malloc(secsz);
|
|
if (ebr == NULL)
|
|
return (ENOMEM);
|
|
memset(ebr, 0, secsz);
|
|
le16enc(ebr + DOSMAGICOFFSET, DOSMAGIC);
|
|
|
|
error = 0;
|
|
trksz = 1; /* Sectors/track */
|
|
STAILQ_FOREACH_SAFE(part, &partlist, link, next) {
|
|
block = part->block - trksz;
|
|
dp = (void *)(ebr + DOSPARTOFF);
|
|
ebr_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect, trksz);
|
|
dp->dp_typ = ALIAS_TYPE2INT(part->type);
|
|
ebr_chs(&dp->dp_ecyl, &dp->dp_ehd, &dp->dp_esect,
|
|
part->block + part->size - 1);
|
|
le32enc(&dp->dp_start, trksz);
|
|
le32enc(&dp->dp_size, part->size);
|
|
|
|
/* Add link entry */
|
|
if (next != NULL) {
|
|
dp++;
|
|
ebr_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
|
|
next->block - trksz);
|
|
dp->dp_typ = DOSPTYP_EXT;
|
|
ebr_chs(&dp->dp_ecyl, &dp->dp_ehd, &dp->dp_esect,
|
|
next->block + next->size - 1);
|
|
le32enc(&dp->dp_start, next->block - trksz);
|
|
le32enc(&dp->dp_size, next->size + trksz);
|
|
}
|
|
|
|
error = mkimg_seek(fd, block);
|
|
if (error == 0) {
|
|
if (write(fd, ebr, secsz) != secsz)
|
|
error = errno;
|
|
}
|
|
if (error)
|
|
break;
|
|
|
|
memset(ebr + DOSPARTOFF, 0, 2 * DOSPARTSIZE);
|
|
}
|
|
|
|
free(ebr);
|
|
return (error);
|
|
}
|
|
|
|
static struct mkimg_scheme ebr_scheme = {
|
|
.name = "ebr",
|
|
.description = "Extended Boot Record",
|
|
.aliases = ebr_aliases,
|
|
.metadata = ebr_metadata,
|
|
.write = ebr_write,
|
|
.nparts = 4096
|
|
};
|
|
|
|
SCHEME_DEFINE(ebr_scheme);
|