Annotation of sys/arch/alpha/stand/installboot.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: installboot.c,v 1.14 2007/06/06 17:15:11 deraadt Exp $ */
! 2: /* $NetBSD: installboot.c,v 1.2 1997/04/06 08:41:12 cgd Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1997 Christopher G. Demetriou. All rights reserved.
! 6: * Copyright (c) 1994 Paul Kranenburg
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. All advertising materials mentioning features or use of this software
! 18: * must display the following acknowledgement:
! 19: * This product includes software developed by Paul Kranenburg.
! 20: * 4. The name of the author may not be used to endorse or promote products
! 21: * derived from this software without specific prior written permission
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 26: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 27: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 28: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 29: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 30: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 31: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 32: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 33: */
! 34:
! 35: #include <sys/param.h>
! 36: #include <sys/mount.h>
! 37: #include <sys/ioctl.h>
! 38: #include <sys/time.h>
! 39: #include <sys/stat.h>
! 40: #include <sys/sysctl.h>
! 41: #include <ufs/ufs/dinode.h>
! 42: #include <ufs/ufs/dir.h>
! 43: #include <ufs/ffs/fs.h>
! 44: #include <sys/disklabel.h>
! 45: #include <sys/dkio.h>
! 46: #include <err.h>
! 47: #include <errno.h>
! 48: #include <fcntl.h>
! 49: #include <stdlib.h>
! 50: #include <stdio.h>
! 51: #include <string.h>
! 52: #include <unistd.h>
! 53: #include <util.h>
! 54:
! 55: #include "bbinfo.h"
! 56:
! 57: #ifndef ISO_DEFAULT_BLOCK_SIZE
! 58: #define ISO_DEFAULT_BLOCK_SIZE 2048
! 59: #endif
! 60:
! 61: int verbose, nowrite, hflag;
! 62: char *boot, *proto, *dev;
! 63:
! 64: struct bbinfoloc *bbinfolocp;
! 65: struct bbinfo *bbinfop;
! 66: int max_block_count;
! 67:
! 68:
! 69: char *loadprotoblocks(char *, long *);
! 70: int loadblocknums(char *, int, unsigned long);
! 71: static void devread(int, void *, daddr_t, size_t, char *);
! 72: static void usage(void);
! 73: int main(int, char *[]);
! 74:
! 75: int isofsblk = 0;
! 76: int isofseblk = 0;
! 77:
! 78: static void
! 79: usage(void)
! 80: {
! 81: (void)fprintf(stderr,
! 82: "usage: installboot [-n] [-v] [-s isofsblk -e isofseblk] "
! 83: "<boot> <proto> <device>\n");
! 84: exit(1);
! 85: }
! 86:
! 87: int
! 88: main(int argc, char *argv[])
! 89: {
! 90: int c, devfd;
! 91: char *protostore;
! 92: long protosize;
! 93: struct stat disksb, bootsb;
! 94: struct disklabel dl;
! 95: daddr64_t partoffset;
! 96: #define BBPAD 0x1e0
! 97: struct bb {
! 98: char bb_pad[BBPAD]; /* disklabel lives in here, actually */
! 99: long bb_secsize; /* size of secondary boot block */
! 100: long bb_secstart; /* start of secondary boot block */
! 101: long bb_flags; /* unknown; always zero */
! 102: long bb_cksum; /* checksum of the boot block, as longs. */
! 103: } bb;
! 104: long *lp, *ep;
! 105:
! 106: while ((c = getopt(argc, argv, "vns:e:")) != -1) {
! 107: switch (c) {
! 108: case 'n':
! 109: /* Do not actually write the bootblock to disk */
! 110: nowrite = 1;
! 111: break;
! 112: case 'v':
! 113: /* Chat */
! 114: verbose = 1;
! 115: break;
! 116: case 's':
! 117: isofsblk = atoi(optarg);
! 118: break;
! 119: case 'e':
! 120: isofseblk = atoi(optarg);
! 121: break;
! 122: default:
! 123: usage();
! 124: }
! 125: }
! 126:
! 127: if (argc - optind < 3)
! 128: usage();
! 129:
! 130: boot = argv[optind];
! 131: proto = argv[optind + 1];
! 132: dev = argv[optind + 2];
! 133:
! 134: if (verbose) {
! 135: (void)printf("boot: %s\n", boot);
! 136: (void)printf("proto: %s\n", proto);
! 137: (void)printf("device: %s\n", dev);
! 138: }
! 139:
! 140: /* Load proto blocks into core */
! 141: if ((protostore = loadprotoblocks(proto, &protosize)) == NULL)
! 142: exit(1);
! 143:
! 144: /* Open and check raw disk device */
! 145: if ((devfd = opendev(dev, O_RDONLY, OPENDEV_PART, &dev)) < 0)
! 146: err(1, "open: %s", dev);
! 147: if (fstat(devfd, &disksb) == -1)
! 148: err(1, "fstat: %s", dev);
! 149: if (!S_ISCHR(disksb.st_mode))
! 150: errx(1, "%s must be a character device node", dev);
! 151: if ((minor(disksb.st_rdev) % getmaxpartitions()) != getrawpartition())
! 152: errx(1, "%s must be the raw partition", dev);
! 153:
! 154: /* Extract and load block numbers */
! 155: if (stat(boot, &bootsb) == -1)
! 156: err(1, "stat: %s", boot);
! 157: if (!S_ISREG(bootsb.st_mode))
! 158: errx(1, "%s must be a regular file", boot);
! 159: if ((minor(disksb.st_rdev) / getmaxpartitions()) !=
! 160: (minor(bootsb.st_dev) / getmaxpartitions()))
! 161: errx(1, "%s must be somewhere on %s", boot, dev);
! 162:
! 163: /*
! 164: * Find the offset of the secondary boot block's partition
! 165: * into the disk. If disklabels not supported, assume zero.
! 166: */
! 167: if (ioctl(devfd, DIOCGDINFO, &dl) != -1) {
! 168: partoffset = DL_GETPOFFSET(&dl.d_partitions[minor(bootsb.st_dev) %
! 169: getmaxpartitions()]);
! 170: } else {
! 171: if (errno != ENOTTY)
! 172: err(1, "read disklabel: %s", dev);
! 173: warnx("couldn't read label from %s, using part offset of 0",
! 174: dev);
! 175: partoffset = 0;
! 176: }
! 177: if (verbose)
! 178: (void)printf("%s partition offset = 0x%lx\n", boot, partoffset);
! 179:
! 180: /* Sync filesystems (make sure boot's block numbers are stable) */
! 181: sync();
! 182: sleep(2);
! 183: sync();
! 184: sleep(2);
! 185:
! 186: if (loadblocknums(boot, devfd, partoffset) != 0)
! 187: exit(1);
! 188:
! 189: (void)close(devfd);
! 190:
! 191: if (nowrite)
! 192: return 0;
! 193:
! 194: #if 0
! 195: /* Write patched proto bootblocks into the superblock */
! 196: if (protosize > SBSIZE - DEV_BSIZE)
! 197: errx(1, "proto bootblocks too big");
! 198: #endif
! 199:
! 200: if ((devfd = opendev(dev, O_RDWR, OPENDEV_PART, &dev)) < 0)
! 201: err(1, "open: %s", dev);
! 202:
! 203: if (lseek(devfd, DEV_BSIZE, SEEK_SET) != DEV_BSIZE)
! 204: err(1, "lseek bootstrap");
! 205:
! 206: if (write(devfd, protostore, protosize) != protosize)
! 207: err(1, "write bootstrap");
! 208:
! 209: if (lseek(devfd, 0, SEEK_SET) != 0)
! 210: err(1, "lseek label");
! 211:
! 212: if (read(devfd, &bb, sizeof (bb)) != sizeof (bb))
! 213: err(1, "read label");
! 214:
! 215: bb.bb_secsize = 15;
! 216: bb.bb_secstart = 1;
! 217: bb.bb_flags = 0;
! 218: bb.bb_cksum = 0;
! 219:
! 220: for (lp = (long *)&bb, ep = &bb.bb_cksum; lp < ep; lp++)
! 221: bb.bb_cksum += *lp;
! 222:
! 223: if (lseek(devfd, 0, SEEK_SET) != 0)
! 224: err(1, "lseek label 2");
! 225:
! 226: if (write(devfd, &bb, sizeof bb) != sizeof bb)
! 227: err(1, "write label ");
! 228:
! 229: (void)close(devfd);
! 230: return 0;
! 231: }
! 232:
! 233: char *
! 234: loadprotoblocks(char *fname, long *size)
! 235: {
! 236: int fd, sz;
! 237: char *bp;
! 238: struct stat statbuf;
! 239: u_int64_t *matchp;
! 240:
! 241: /*
! 242: * Read the prototype boot block into memory.
! 243: */
! 244: if ((fd = open(fname, O_RDONLY)) < 0) {
! 245: warn("open: %s", fname);
! 246: return NULL;
! 247: }
! 248: if (fstat(fd, &statbuf) != 0) {
! 249: warn("fstat: %s", fname);
! 250: close(fd);
! 251: return NULL;
! 252: }
! 253: sz = roundup(statbuf.st_size, DEV_BSIZE);
! 254: if ((bp = calloc(sz, 1)) == NULL) {
! 255: warnx("malloc: %s: no memory", fname);
! 256: close(fd);
! 257: return NULL;
! 258: }
! 259: if (read(fd, bp, statbuf.st_size) != statbuf.st_size) {
! 260: warn("read: %s", fname);
! 261: free(bp);
! 262: close(fd);
! 263: return NULL;
! 264: }
! 265: close(fd);
! 266:
! 267: /*
! 268: * Find the magic area of the program, and figure out where
! 269: * the 'blocks' struct is, from that.
! 270: */
! 271: bbinfolocp = NULL;
! 272: for (matchp = (u_int64_t *)bp; (char *)matchp < bp + sz; matchp++) {
! 273: if (*matchp != 0xbabefacedeadbeef)
! 274: continue;
! 275: bbinfolocp = (struct bbinfoloc *)matchp;
! 276: if (bbinfolocp->magic1 == 0xbabefacedeadbeef &&
! 277: bbinfolocp->magic2 == 0xdeadbeeffacebabe)
! 278: break;
! 279: bbinfolocp = NULL;
! 280: }
! 281:
! 282: if (bbinfolocp == NULL) {
! 283: warnx("%s: not a valid boot block?", fname);
! 284: return NULL;
! 285: }
! 286:
! 287: bbinfop = (struct bbinfo *)(bp + bbinfolocp->end - bbinfolocp->start);
! 288: memset(bbinfop, 0, sz - (bbinfolocp->end - bbinfolocp->start));
! 289: max_block_count =
! 290: ((char *)bbinfop->blocks - bp) / sizeof (bbinfop->blocks[0]);
! 291:
! 292: if (verbose) {
! 293: (void)printf("boot block info locator at offset 0x%x\n",
! 294: (char *)bbinfolocp - bp);
! 295: (void)printf("boot block info at offset 0x%x\n",
! 296: (char *)bbinfop - bp);
! 297: (void)printf("max number of blocks: %d\n", max_block_count);
! 298: }
! 299:
! 300: *size = sz;
! 301: return (bp);
! 302: }
! 303:
! 304: static void
! 305: devread(int fd, void *buf, daddr_t blk, size_t size, char *msg)
! 306: {
! 307: if (lseek(fd, dbtob(blk), SEEK_SET) != dbtob(blk))
! 308: err(1, "%s: devread: lseek", msg);
! 309:
! 310: if (read(fd, buf, size) != size)
! 311: err(1, "%s: devread: read", msg);
! 312: }
! 313:
! 314: static char sblock[SBSIZE];
! 315:
! 316: int
! 317: loadblocknums(char *boot, int devfd, unsigned long partoffset)
! 318: {
! 319: int i, fd, ndb;
! 320: struct stat statbuf;
! 321: struct statfs statfsbuf;
! 322: struct fs *fs;
! 323: char *buf;
! 324: daddr_t blk, *ap;
! 325: struct ufs1_dinode *ip;
! 326: int32_t cksum;
! 327:
! 328: /*
! 329: * Open 2nd-level boot program and record the block numbers
! 330: * it occupies on the filesystem represented by `devfd'.
! 331: */
! 332: if ((fd = open(boot, O_RDONLY)) < 0)
! 333: err(1, "open: %s", boot);
! 334:
! 335: if (fstatfs(fd, &statfsbuf) != 0)
! 336: err(1, "statfs: %s", boot);
! 337:
! 338: if (isofsblk) {
! 339: bbinfop->bsize = ISO_DEFAULT_BLOCK_SIZE;
! 340: bbinfop->nblocks = isofseblk - isofsblk + 1;
! 341: if (bbinfop->nblocks > max_block_count)
! 342: errx(1, "%s: Too many blocks", boot);
! 343: if (verbose)
! 344: (void)printf("%s: starting block %d (%d total):\n\t",
! 345: boot, isofsblk, bbinfop->nblocks);
! 346: for (i = 0; i < bbinfop->nblocks; i++) {
! 347: blk = (isofsblk + i) * (bbinfop->bsize / DEV_BSIZE);
! 348: bbinfop->blocks[i] = blk;
! 349: if (verbose)
! 350: (void)printf("%d ", blk);
! 351: }
! 352: if (verbose)
! 353: (void)printf("\n");
! 354:
! 355: cksum = 0;
! 356: for (i = 0; i < bbinfop->nblocks +
! 357: (sizeof(*bbinfop) / sizeof(bbinfop->blocks[0])) - 1; i++)
! 358: cksum += ((int32_t *)bbinfop)[i];
! 359: bbinfop->cksum = -cksum;
! 360:
! 361: return 0;
! 362: }
! 363:
! 364: if (strncmp(statfsbuf.f_fstypename, MOUNT_FFS, MFSNAMELEN))
! 365: errx(1, "%s: must be on a FFS filesystem", boot);
! 366:
! 367: if (fsync(fd) != 0)
! 368: err(1, "fsync: %s", boot);
! 369:
! 370: if (fstat(fd, &statbuf) != 0)
! 371: err(1, "fstat: %s", boot);
! 372:
! 373: close(fd);
! 374:
! 375: /* Read superblock */
! 376: devread(devfd, sblock, btodb(SBOFF) + partoffset, SBSIZE,
! 377: "superblock");
! 378: fs = (struct fs *)sblock;
! 379:
! 380: /* Read inode */
! 381: if ((buf = malloc(fs->fs_bsize)) == NULL)
! 382: errx(1, "No memory for filesystem block");
! 383:
! 384: blk = fsbtodb(fs, ino_to_fsba(fs, statbuf.st_ino));
! 385: devread(devfd, buf, blk + partoffset, fs->fs_bsize, "inode");
! 386: ip = (struct ufs1_dinode *)(buf) + ino_to_fsbo(fs, statbuf.st_ino);
! 387:
! 388: /*
! 389: * Register filesystem block size.
! 390: */
! 391: bbinfop->bsize = fs->fs_bsize;
! 392:
! 393: /*
! 394: * Get the block numbers; we don't handle fragments
! 395: */
! 396: ndb = howmany(ip->di_size, fs->fs_bsize);
! 397: if (ndb > max_block_count)
! 398: errx(1, "%s: Too many blocks", boot);
! 399:
! 400: /*
! 401: * Register block count.
! 402: */
! 403: bbinfop->nblocks = ndb;
! 404:
! 405: if (verbose)
! 406: (void)printf("%s: block numbers: ", boot);
! 407: ap = ip->di_db;
! 408: for (i = 0; i < NDADDR && *ap && ndb; i++, ap++, ndb--) {
! 409: blk = fsbtodb(fs, *ap);
! 410: bbinfop->blocks[i] = blk + partoffset;
! 411: if (verbose)
! 412: (void)printf("%d ", bbinfop->blocks[i]);
! 413: }
! 414: if (verbose)
! 415: (void)printf("\n");
! 416:
! 417: if (ndb == 0)
! 418: goto checksum;
! 419:
! 420: /*
! 421: * Just one level of indirections; there isn't much room
! 422: * for more in the 1st-level bootblocks anyway.
! 423: */
! 424: if (verbose)
! 425: (void)printf("%s: block numbers (indirect): ", boot);
! 426: blk = ip->di_ib[0];
! 427: devread(devfd, buf, blk + partoffset, fs->fs_bsize,
! 428: "indirect block");
! 429: ap = (daddr_t *)buf;
! 430: for (; i < NINDIR(fs) && *ap && ndb; i++, ap++, ndb--) {
! 431: blk = fsbtodb(fs, *ap);
! 432: bbinfop->blocks[i] = blk + partoffset;
! 433: if (verbose)
! 434: (void)printf("%d ", bbinfop->blocks[i]);
! 435: }
! 436: if (verbose)
! 437: (void)printf("\n");
! 438:
! 439: if (ndb)
! 440: errx(1, "%s: Too many blocks", boot);
! 441:
! 442: checksum:
! 443: cksum = 0;
! 444: for (i = 0; i < bbinfop->nblocks +
! 445: (sizeof (*bbinfop) / sizeof (bbinfop->blocks[0])) - 1; i++)
! 446: cksum += ((int32_t *)bbinfop)[i];
! 447: bbinfop->cksum = -cksum;
! 448:
! 449: return 0;
! 450: }
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