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/* $OpenBSD: octeon_installboot.c,v 1.11 2023/04/26 18:04:21 kn Exp $ */
/*
* Copyright (c) 2011 Joel Sing <jsing@openbsd.org>
* Copyright (c) 2010 Otto Moerbeek <otto@openbsd.org>
* Copyright (c) 2003 Tom Cosgrove <tom.cosgrove@arches-consulting.com>
* Copyright (c) 1997 Michael Shalayeff
* Copyright (c) 1994 Paul Kranenburg
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*/
#include <sys/param.h> /* DEV_BSIZE */
#include <sys/disklabel.h>
#include <sys/dkio.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <endian.h>
#include "installboot.h"
static int create_filesystem(struct disklabel *, char);
static void write_filesystem(struct disklabel *, char);
static int findmbrfat(int, struct disklabel *);
void
md_init(void)
{
stages = 1;
stage1 = "/usr/mdec/boot";
}
void
md_loadboot(void)
{
}
void
md_prepareboot(int devfd, char *dev)
{
struct disklabel dl;
int part;
/* Get and check disklabel. */
if (ioctl(devfd, DIOCGDINFO, &dl) == -1)
err(1, "disklabel: %s", dev);
if (dl.d_magic != DISKMAGIC)
errx(1, "bad disklabel magic=0x%08x", dl.d_magic);
/* Warn on unknown disklabel types. */
if (dl.d_type == 0)
warnx("disklabel type unknown");
part = findmbrfat(devfd, &dl);
if (part != -1) {
create_filesystem(&dl, (char)part);
return;
}
}
void
md_installboot(int devfd, char *dev)
{
struct disklabel dl;
int part;
/* Get and check disklabel. */
if (ioctl(devfd, DIOCGDINFO, &dl) == -1)
err(1, "disklabel: %s", dev);
if (dl.d_magic != DISKMAGIC)
errx(1, "bad disklabel magic=0x%08x", dl.d_magic);
/* Warn on unknown disklabel types. */
if (dl.d_type == 0)
warnx("disklabel type unknown");
part = findmbrfat(devfd, &dl);
if (part != -1) {
write_filesystem(&dl, (char)part);
return;
}
}
static int
create_filesystem(struct disklabel *dl, char part)
{
static const char *newfsfmt = "/sbin/newfs -t msdos %s >/dev/null";
struct msdosfs_args args;
char cmd[60];
int rslt;
/* Newfs <duid>.<part> as msdos filesystem. */
memset(&args, 0, sizeof(args));
rslt = asprintf(&args.fspec,
"%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx.%c",
dl->d_uid[0], dl->d_uid[1], dl->d_uid[2], dl->d_uid[3],
dl->d_uid[4], dl->d_uid[5], dl->d_uid[6], dl->d_uid[7],
part);
if (rslt == -1) {
warn("bad special device");
return rslt;
}
rslt = snprintf(cmd, sizeof(cmd), newfsfmt, args.fspec);
if (rslt >= sizeof(cmd)) {
warnx("can't build newfs command");
free(args.fspec);
rslt = -1;
return rslt;
}
if (verbose)
fprintf(stderr, "%s %s\n",
(nowrite ? "would newfs" : "newfsing"), args.fspec);
if (!nowrite) {
rslt = system(cmd);
if (rslt == -1) {
warn("system('%s') failed", cmd);
free(args.fspec);
return rslt;
}
}
free(args.fspec);
return 0;
}
static void
write_filesystem(struct disklabel *dl, char part)
{
static char *fsckfmt = "/sbin/fsck -t msdos %s >/dev/null";
struct msdosfs_args args;
char cmd[60];
char dst[PATH_MAX];
size_t mntlen;
int rslt;
/* Create directory for temporary mount point. */
strlcpy(dst, "/tmp/installboot.XXXXXXXXXX", sizeof(dst));
if (mkdtemp(dst) == NULL)
err(1, "mkdtemp('%s') failed", dst);
mntlen = strlen(dst);
/* Mount <duid>.<part> as msdos filesystem. */
memset(&args, 0, sizeof(args));
rslt = asprintf(&args.fspec,
"%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx.%c",
dl->d_uid[0], dl->d_uid[1], dl->d_uid[2], dl->d_uid[3],
dl->d_uid[4], dl->d_uid[5], dl->d_uid[6], dl->d_uid[7],
part);
if (rslt == -1) {
warn("bad special device");
goto rmdir;
}
args.export_info.ex_root = -2;
args.export_info.ex_flags = 0;
args.flags = MSDOSFSMNT_LONGNAME;
if (mount(MOUNT_MSDOS, dst, 0, &args) == -1) {
/* Try fsck'ing it. */
rslt = snprintf(cmd, sizeof(cmd), fsckfmt, args.fspec);
if (rslt >= sizeof(cmd)) {
warnx("can't build fsck command");
rslt = -1;
goto rmdir;
}
rslt = system(cmd);
if (rslt == -1) {
warn("system('%s') failed", cmd);
goto rmdir;
}
if (mount(MOUNT_MSDOS, dst, 0, &args) == -1) {
/* Try newfs'ing it. */
rslt = create_filesystem(dl, part);
if (rslt == -1)
goto rmdir;
rslt = mount(MOUNT_MSDOS, dst, 0, &args);
if (rslt == -1) {
warn("unable to mount MSDOS partition");
goto rmdir;
}
}
}
/*
* Copy /usr/mdec/boot to /mnt/boot.
*/
if (strlcat(dst, "/boot", sizeof(dst)) >= sizeof(dst)) {
rslt = -1;
warn("unable to build /boot path");
goto umount;
}
if (verbose)
fprintf(stderr, "%s %s to %s\n",
(nowrite ? "would copy" : "copying"), stage1, dst);
if (!nowrite) {
rslt = filecopy(stage1, dst);
if (rslt == -1)
goto umount;
}
rslt = 0;
umount:
dst[mntlen] = '\0';
if (unmount(dst, MNT_FORCE) == -1)
err(1, "unmount('%s') failed", dst);
rmdir:
free(args.fspec);
dst[mntlen] = '\0';
if (rmdir(dst) == -1)
err(1, "rmdir('%s') failed", dst);
if (rslt == -1)
exit(1);
}
int
findmbrfat(int devfd, struct disklabel *dl)
{
struct dos_partition dp[NDOSPART];
ssize_t len;
u_int64_t start = 0;
int i;
u_int8_t *secbuf;
if ((secbuf = malloc(dl->d_secsize)) == NULL)
err(1, NULL);
/* Read MBR. */
len = pread(devfd, secbuf, dl->d_secsize, 0);
if (len != dl->d_secsize)
err(4, "can't read mbr");
memcpy(dp, &secbuf[DOSPARTOFF], sizeof(dp));
for (i = 0; i < NDOSPART; i++) {
if (dp[i].dp_typ == DOSPTYP_UNUSED)
continue;
if (dp[i].dp_typ == DOSPTYP_FAT16L ||
dp[i].dp_typ == DOSPTYP_FAT32L ||
dp[i].dp_typ == DOSPTYP_FAT16B)
start = letoh32(dp[i].dp_start);
}
free(secbuf);
if (start) {
for (i = 0; i < MAXPARTITIONS; i++) {
if (DL_GETPSIZE(&dl->d_partitions[i]) > 0 &&
DL_GETPOFFSET(&dl->d_partitions[i]) == start)
return ('a' + i);
}
}
return (-1);
}
|
