NetBSD/sys/arch/alpha/stand/installboot.c

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1995-12-20 03:17:49 +03:00
/* $NetBSD: installboot.c,v 1.2 1995/12/20 00:17:49 cgd Exp $ */
/*
* 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>
#include <sys/mount.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.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 "bbinfo.h"
int verbose, nowrite, hflag;
char *boot, *proto, *dev;
struct bbinfoloc *bbinfolocp;
struct bbinfo *bbinfop;
int max_block_count;
char *loadprotoblocks __P((char *, long *));
int loadblocknums __P((char *, int));
static void devread __P((int, void *, daddr_t, size_t, char *));
static void usage __P((void));
int main __P((int, char *[]));
static void
usage()
{
fprintf(stderr,
"usage: installboot [-n] [-v] <boot> <proto> <device>\n");
exit(1);
}
int
main(argc, argv)
int argc;
char *argv[];
{
int c;
int devfd;
char *protostore;
long protosize;
int mib[2];
size_t size;
while ((c = getopt(argc, argv, "vn")) != EOF) {
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 < 3) {
usage();
}
boot = argv[optind];
proto = argv[optind + 1];
dev = argv[optind + 2];
if (verbose) {
printf("boot: %s\n", boot);
printf("proto: %s\n", proto);
printf("device: %s\n", dev);
}
/* Load proto blocks into core */
if ((protostore = loadprotoblocks(proto, &protosize)) == NULL)
exit(1);
/* Open and check raw disk device */
if ((devfd = open(dev, O_RDONLY, 0)) < 0)
err(1, "open: %s", dev);
/* Extract and load block numbers */
if (loadblocknums(boot, devfd) != 0)
exit(1);
(void)close(devfd);
if (nowrite)
return 0;
#if 0
/* Write patched proto bootblocks into the superblock */
if (protosize > SBSIZE - DEV_BSIZE)
errx(1, "proto bootblocks too big");
#endif
if ((devfd = open(dev, O_RDWR, 0)) < 0)
err(1, "open: %s", dev);
if (lseek(devfd, DEV_BSIZE, SEEK_SET) != DEV_BSIZE)
err(1, "lseek bootstrap");
/* Sync filesystems (to clean in-memory superblock?) */
sync();
sleep(3);
if (write(devfd, protostore, protosize) != protosize)
err(1, "write bootstrap");
{
#define BBPAD 0x1e0
struct bb {
char bb_pad[BBPAD]; /* disklabel lives in here, actually */
long bb_secsize; /* size of secondary boot block */
long bb_secstart; /* start of secondary boot block */
long bb_flags; /* unknown; always zero */
long bb_cksum; /* checksum of the the boot block, as longs. */
} bb;
long *lp, *ep;
if (lseek(devfd, 0, SEEK_SET) != 0)
err(1, "lseek label");
if (read(devfd, &bb, sizeof (bb)) != sizeof (bb))
err(1, "read label");
bb.bb_secsize = 15;
bb.bb_secstart = 1;
bb.bb_flags = 0;
bb.bb_cksum = 0;
for (lp = (long *)&bb, ep = &bb.bb_cksum; lp < ep; lp++)
bb.bb_cksum += *lp;
if (lseek(devfd, 0, SEEK_SET) != 0)
err(1, "lseek label 2");
if (write(devfd, &bb, sizeof bb) != sizeof bb)
err(1, "write label ");
}
(void)close(devfd);
return 0;
}
char *
loadprotoblocks(fname, size)
char *fname;
long *size;
{
int fd, sz;
char *bp;
struct stat statbuf;
struct exec *hp;
long off;
u_int64_t *matchp;
/*
* Read the prototype boot block into memory.
*/
if ((fd = open(fname, O_RDONLY)) < 0) {
warn("open: %s", fname);
return NULL;
}
if (fstat(fd, &statbuf) != 0) {
warn("fstat: %s", fname);
close(fd);
return NULL;
}
sz = roundup(statbuf.st_size, DEV_BSIZE);
if ((bp = calloc(sz, 1)) == NULL) {
warnx("malloc: %s: no memory", fname);
close(fd);
return NULL;
}
if (read(fd, bp, statbuf.st_size) != statbuf.st_size) {
warn("read: %s", fname);
free(bp);
close(fd);
return NULL;
}
close(fd);
/*
* Find the magic area of the program, and figure out where
* the 'blocks' struct is, from that.
*/
bbinfolocp = NULL;
for (matchp = (u_int64_t *)bp; (char *)matchp < bp + sz; matchp++) {
if (*matchp != 0xbabefacedeadbeef)
continue;
bbinfolocp = (struct bbinfoloc *)matchp;
if (bbinfolocp->magic1 == 0xbabefacedeadbeef &&
bbinfolocp->magic2 == 0xdeadbeeffacebabe)
break;
bbinfolocp = NULL;
}
if (bbinfolocp == NULL) {
warnx("%s: not a valid boot block?", fname);
return NULL;
}
bbinfop = (struct bbinfo *)(bp + bbinfolocp->end - bbinfolocp->start);
memset(bbinfop, 0, sz - (bbinfolocp->end - bbinfolocp->start));
max_block_count =
((char *)bbinfop->blocks - bp) / sizeof (bbinfop->blocks[0]);
if (verbose) {
printf("boot block info locator at offset 0x%x\n",
(char *)bbinfolocp - bp);
printf("boot block info at offset 0x%x\n",
(char *)bbinfop - bp);
printf("max number of blocks: %d\n", max_block_count);
}
*size = sz;
return (bp);
}
static void
devread(fd, buf, blk, size, msg)
int fd;
void *buf;
daddr_t blk;
size_t size;
char *msg;
{
if (lseek(fd, dbtob(blk), SEEK_SET) != dbtob(blk))
err(1, "%s: devread: lseek", msg);
if (read(fd, buf, size) != size)
err(1, "%s: devread: read", msg);
}
static char sblock[SBSIZE];
int
loadblocknums(boot, devfd)
char *boot;
int devfd;
{
int i, fd;
struct stat statbuf;
struct statfs statfsbuf;
struct fs *fs;
char *buf;
daddr_t blk, *ap;
struct dinode *ip;
int ndb;
int32_t cksum;
/*
* Open 2nd-level boot program and record the block numbers
* it occupies on the filesystem represented by `devfd'.
*/
if ((fd = open(boot, O_RDONLY)) < 0)
err(1, "open: %s", boot);
if (fstatfs(fd, &statfsbuf) != 0)
err(1, "statfs: %s", boot);
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if (strncmp(statfsbuf.f_fstypename, MOUNT_FFS, MFSNAMELEN))
errx(1, "%s: must be on a FFS filesystem", boot);
if (fsync(fd) != 0)
err(1, "fsync: %s", boot);
if (fstat(fd, &statbuf) != 0)
err(1, "fstat: %s", boot);
close(fd);
/* Read superblock */
devread(devfd, sblock, btodb(SBOFF), SBSIZE, "superblock");
fs = (struct fs *)sblock;
/* Read inode */
if ((buf = malloc(fs->fs_bsize)) == NULL)
errx(1, "No memory for filesystem block");
blk = fsbtodb(fs, ino_to_fsba(fs, statbuf.st_ino));
devread(devfd, buf, blk, fs->fs_bsize, "inode");
ip = (struct dinode *)(buf) + ino_to_fsbo(fs, statbuf.st_ino);
/*
* Register filesystem block size.
*/
bbinfop->bsize = fs->fs_bsize;
/*
* Get the block numbers; we don't handle fragments
*/
ndb = howmany(ip->di_size, fs->fs_bsize);
if (ndb > max_block_count)
errx(1, "%s: Too many blocks", boot);
/*
* Register block count.
*/
bbinfop->nblocks = ndb;
if (verbose)
printf("%s: block numbers: ", boot);
ap = ip->di_db;
for (i = 0; i < NDADDR && *ap && ndb; i++, ap++, ndb--) {
blk = fsbtodb(fs, *ap);
bbinfop->blocks[i] = blk;
if (verbose)
printf("%d ", blk);
}
if (verbose)
printf("\n");
if (ndb == 0)
goto checksum;
/*
* Just one level of indirections; there isn't much room
* for more in the 1st-level bootblocks anyway.
*/
if (verbose)
printf("%s: block numbers (indirect): ", boot);
blk = ip->di_ib[0];
devread(devfd, buf, blk, fs->fs_bsize, "indirect block");
ap = (daddr_t *)buf;
for (; i < NINDIR(fs) && *ap && ndb; i++, ap++, ndb--) {
blk = fsbtodb(fs, *ap);
bbinfop->blocks[i] = blk;
if (verbose)
printf("%d ", blk);
}
if (verbose)
printf("\n");
if (ndb)
errx(1, "%s: Too many blocks", boot);
checksum:
cksum = 0;
for (i = 0; i < bbinfop->nblocks +
(sizeof (*bbinfop) / sizeof (bbinfop->blocks[0])) - 1; i++) {
cksum += ((int32_t *)bbinfop)[i];
}
bbinfop->cksum = -cksum;
return 0;
}