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/* $OpenBSD: installboot.c,v 1.14 2012/01/11 16:15:02 jsing Exp $ */
/* $NetBSD: installboot.c,v 1.8 2001/02/19 22:48:59 cgd Exp $ */
/*-
* Copyright (c) 2012 Joel Sing <jsing@openbsd.org>
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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/param.h>
#include <sys/disklabel.h>
#include <sys/dkio.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <dev/biovar.h>
#include <dev/softraidvar.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
int verbose, nowrite;
char *dev, *blkstore;
size_t blksize;
static void usage(void);
int main(int, char *[]);
static void write_bootblk(int);
static int sr_volume(int, int *, int *);
static void sr_installboot(int);
static void sr_install_bootblk(int, int, int);
static void
usage(void)
{
extern char *__progname;
fprintf(stderr, "Usage: %s [-nv] <bootblk> <device>\n", __progname);
exit(1);
}
int
main(int argc, char *argv[])
{
char *blkfile, *realdev;
int vol = -1, ndisks = 0, disk;
int c, devfd, blkfd;
struct stat sb;
while ((c = getopt(argc, argv, "nv")) != -1) {
switch (c) {
case 'n':
/* Do not actually write the bootblock to disk. */
nowrite = 1;
break;
case 'v':
/* Chat */
verbose = 1;
break;
default:
usage();
}
}
if (argc - optind < 2)
usage();
blkfile = argv[optind++];
dev = argv[optind];
if (verbose)
printf("bootblk: %s\n", blkfile);
if ((blkfd = open(blkfile, O_RDONLY)) < 0)
err(1, "open: %s", blkfile);
if (fstat(blkfd, &sb) == -1)
err(1, "fstat: %s", blkfile);
if (sb.st_size == 0)
errx(1, "%s is empty", blkfile);
blksize = howmany(sb.st_size, DEV_BSIZE) * DEV_BSIZE;
if (blksize > SBSIZE - DEV_BSIZE)
errx(1, "boot blocks too big");
if ((blkstore = malloc(blksize)) == NULL)
err(1, "malloc: %s", blkfile);
bzero(blkstore, blksize);
if (read(blkfd, blkstore, sb.st_size) != sb.st_size)
err(1, "read: %s", blkfile);
if ((devfd = opendev(dev, (nowrite ? O_RDONLY : O_RDWR),
OPENDEV_PART, &realdev)) < 0)
err(1, "open: %s", realdev);
if (verbose)
printf("device: %s\n", realdev);
if (sr_volume(devfd, &vol, &ndisks)) {
/* Install boot loader in softraid volume. */
sr_installboot(devfd);
/* Install bootblk on each disk that is part of this volume. */
for (disk = 0; disk < ndisks; disk++)
sr_install_bootblk(devfd, vol, disk);
} else {
/* Write boot blocks to device. */
write_bootblk(devfd);
}
close(devfd);
}
static void
write_bootblk(int devfd)
{
/*
* Write bootblock into the superblock.
*/
if (nowrite)
return;
if (lseek(devfd, DEV_BSIZE, SEEK_SET) != DEV_BSIZE)
err(1, "lseek boot block");
/* Sync filesystems (to clean in-memory superblock?) */
sync();
if (write(devfd, blkstore, blksize) != blksize)
err(1, "write boot block");
}
static int
sr_volume(int devfd, int *vol, int *disks)
{
struct bioc_inq bi;
struct bioc_vol bv;
int rv, i;
/* Get volume information. */
memset(&bi, 0, sizeof(bi));
rv = ioctl(devfd, BIOCINQ, &bi);
if (rv == -1)
return 0;
/* XXX - softraid volumes will always have a "softraid0" controller. */
if (strncmp(bi.bi_dev, "softraid0", sizeof("softraid0")))
return 0;
/* Locate specific softraid volume. */
for (i = 0; i < bi.bi_novol; i++) {
memset(&bv, 0, sizeof(bv));
bv.bv_volid = i;
rv = ioctl(devfd, BIOCVOL, &bv);
if (rv == -1)
err(1, "BIOCVOL");
if (strncmp(dev, bv.bv_dev, sizeof(bv.bv_dev)) == 0) {
*vol = i;
*disks = bv.bv_nodisk;
break;
}
}
if (verbose)
fprintf(stderr, "%s: softraid volume with %i disk(s)\n",
dev, *disks);
return 1;
}
static void
sr_installboot(int devfd)
{
struct bioc_installboot bb;
struct stat sb;
int fd, i, rv;
u_char *p;
/*
* Install boot loader into softraid boot loader storage area.
*/
bb.bb_bootldr = "XXX";
bb.bb_bootldr_size = sizeof("XXX");
bb.bb_bootblk = blkstore;
bb.bb_bootblk_size = blksize;
strncpy(bb.bb_dev, dev, sizeof(bb.bb_dev));
if (!nowrite) {
if (verbose)
fprintf(stderr, "%s: installing boot loader on "
"softraid volume\n", dev);
rv = ioctl(devfd, BIOCINSTALLBOOT, &bb);
if (rv != 0)
errx(1, "softraid installboot failed");
}
}
static void
sr_install_bootblk(int devfd, int vol, int disk)
{
struct bioc_disk bd;
struct disklabel dl;
struct partition *pp;
uint32_t poffset;
char *realdev;
char part;
int diskfd;
int rv;
/* Get device name for this disk/chunk. */
memset(&bd, 0, sizeof(bd));
bd.bd_volid = vol;
bd.bd_diskid = disk;
rv = ioctl(devfd, BIOCDISK, &bd);
if (rv == -1)
err(1, "BIOCDISK");
/* Check disk status. */
if (bd.bd_status != BIOC_SDONLINE && bd.bd_status != BIOC_SDREBUILD) {
fprintf(stderr, "softraid chunk %u not online - skipping...\n",
disk);
return;
}
if (strlen(bd.bd_vendor) < 1)
errx(1, "invalid disk name");
part = bd.bd_vendor[strlen(bd.bd_vendor) - 1];
if (part < 'a' || part >= 'a' + MAXPARTITIONS)
errx(1, "invalid partition %c\n", part);
bd.bd_vendor[strlen(bd.bd_vendor) - 1] = '\0';
/* Open device. */
if ((diskfd = opendev(bd.bd_vendor, (nowrite ? O_RDONLY : O_RDWR),
OPENDEV_PART, &realdev)) < 0)
err(1, "open: %s", realdev);
if (verbose)
fprintf(stderr, "%s%c: installing boot blocks on %s\n",
bd.bd_vendor, part, realdev);
/* Write boot blocks to device. */
write_bootblk(diskfd);
close(diskfd);
}
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