xref: /src/usr.sbin/installboot/arch/hp300.c

/* $NetBSD: hp300.c,v 1.2 2003/11/08 22:39:07 uwe Exp $ */

/*-
 * Copyright (c) 2003 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by David Laight.
 *
 * 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 the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 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.
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#if !defined(__lint)
__RCSID("$NetBSD: hp300.c,v 1.2 2003/11/08 22:39:07 uwe Exp $");
#endif /* !__lint */

#include <sys/disklabel.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/param.h>

#include <assert.h>
#include <err.h>
#include <md5.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "installboot.h"
#include "hp300_volhdr.h"

#define nelem(x) (sizeof (x)/sizeof *(x))

int
hp300_setboot(ib_params *params)
{
	int		retval;
	uint8_t		*bootstrap;
	ssize_t		rv;
	struct disklabel label;
	struct partition *boot;
	struct hp300_lifdir *lifdir;
	char		ch, *cp;
	int		bootfd = -1;
	int		offset;
	int		max_ptn;
	int		i;
	struct stat	sb;

	assert(params != NULL);
	assert(params->fsfd != -1);
	assert(params->filesystem != NULL);
	assert(params->s1fd != -1);
	assert(params->stage1 != NULL);

	retval = 0;
	bootstrap = MAP_FAILED;

	/* The bootstrap can be well over 8k, and must go into a BOOT ptn. */
	if (ioctl(params->fsfd, DIOCGDINFO, &label) != 0) {
		warn("reading disklabel");
		goto done;
	}

	max_ptn = label.d_npartitions;
	if (max_ptn > nelem(label.d_partitions))
		max_ptn = nelem(label.d_partitions);
	for (boot = label.d_partitions; ; boot++) {
		if (--max_ptn < 0) {
			warnx("No BOOT partition");
			goto done;
		}
		if (boot->p_fstype == FS_BOOT)
			break;
	}

	/*
	 * We put the entire LIF file into the BOOT partition even when
	 * it doesn't start at the beginning of the disk.
	 *
	 * Maybe we ought to be able to take a binary file and add
	 * it to the LIF filesystem.
	 */
	if (boot->p_size * label.d_secsize < params->s1stat.st_size) {
		warn("BOOT partition too small (%d < %lld)",
			boot->p_size * label.d_secsize,
			(long long int)params->s1stat.st_size);
		goto done;
	}

	bootstrap = mmap(NULL, params->s1stat.st_size, PROT_READ | PROT_WRITE,
			    MAP_PRIVATE, params->s1fd, 0);
	if (bootstrap == MAP_FAILED) {
		warn("mmaping `%s'", params->stage1);
		goto done;
	}

	/* Relocate files, sanity check LIF directory on the way */
	lifdir = (void *)(bootstrap + HP300_SECTSIZE * 2);
	for (i = 0; i < 8; lifdir++, i++) {
		int addr = be32toh(lifdir->dir_addr);
		int limit = (params->s1stat.st_size - 1) / HP300_SECTSIZE + 1;
		if (addr + be32toh(lifdir->dir_length) > limit) {
			warnx("LIF entry %d larger (%d %d) than LIF file",
				i,  addr + be32toh(lifdir->dir_length), limit);
			goto done;
		}
		if (addr != 0 && boot->p_offset != 0)
			lifdir->dir_addr = htobe32(addr + boot->p_offset
					* (label.d_secsize / HP300_SECTSIZE));
	}

	/* Open boot partition itself */
	cp = strchr(params->filesystem, 0) - 1;
	ch = *cp;
	*cp = 'a' + (boot - label.d_partitions);
	bootfd = open(params->filesystem,
			params->flags & IB_NOWRITE ? O_RDONLY : O_RDWR, 0);
	if (bootfd == -1) {
		warn("Cannot open BOOT partition %s", params->filesystem);
		*cp = ch;
		goto done;
	}
	*cp = ch;

	/* stat as a slight sanity check */
	if (fstat(bootfd, &sb) == -1
	    || sb.st_size != boot->p_size * label.d_secsize) {
		warnx("Opened BOOT partition size doesn't match disklabel");
		goto done;
	}

	if (params->flags & IB_NOWRITE) {
		retval = 1;
		goto done;
	}

	/* Write LIF volume header and directory to sectors 0 and 1 */
	rv = pwrite(params->fsfd, bootstrap, 1024, 0);
	if (rv != 1024) {
		if (rv == -1)
			warn("Writing `%s'", params->filesystem);
		else
			warnx("Writing `%s': short write", params->filesystem);
		goto done;
	}

	/* Write files to BOOT partition */
	offset = boot->p_offset <= HP300_SECTSIZE * 16 / label.d_secsize
		? HP300_SECTSIZE * 16 : 0;
	rv = pwrite(bootfd, bootstrap + offset, params->s1stat.st_size - offset, offset);
	if (rv != params->s1stat.st_size - offset) {
		if (rv == -1)
			warn("Writing boot filesystem of `%s'",
				params->filesystem);
		else
			warnx("Writing boot filesystem of `%s': short write", params->filesystem);
		goto done;
	}

	retval = 1;

 done:
	if (bootstrap != MAP_FAILED)
		munmap(bootstrap, params->s1stat.st_size);
	if (bootfd != -1)
		close(bootfd);
	return retval;
}