1 /* $NetBSD: installboot.c,v 1.9 2003/04/07 11:45:55 he Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/cdefs.h> 41 #include <sys/mount.h> 42 #include <sys/time.h> 43 #include <sys/stat.h> 44 #include <ufs/ufs/dinode.h> 45 #include <ufs/ufs/dir.h> 46 #include <ufs/ffs/fs.h> 47 #include <err.h> 48 #include <fcntl.h> 49 #include <nlist.h> 50 #include <stdlib.h> 51 #include <stdio.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <sys/disklabel.h> 55 56 #include "loadfile.h" 57 58 int verbose, nowrite, hflag; 59 char *boot, *proto, *dev; 60 61 struct nlist nl[] = { 62 #define X_BLOCK_SIZE 0 63 #define X_BLOCK_COUNT 1 64 #define X_BLOCK_TABLE 2 65 #ifdef __ELF__ 66 { "block_size" }, 67 { "block_count" }, 68 { "block_table" }, 69 #else 70 { "_block_size" }, 71 { "_block_count" }, 72 { "_block_table" }, 73 #endif 74 { NULL } 75 }; 76 77 int *block_size_p; /* block size var. in prototype image */ 78 int *block_count_p; /* block count var. in prototype image */ 79 /* XXX ondisk32 */ 80 int32_t *block_table; /* block number array in prototype image */ 81 int maxblocknum; /* size of this array */ 82 83 84 char *loadprotoblocks __P((char *, size_t *)); 85 int loadblocknums __P((char *, int)); 86 static void devread __P((int, void *, daddr_t, size_t, char *)); 87 static void usage __P((void)); 88 int main __P((int, char *[])); 89 90 91 static void 92 usage() 93 { 94 fprintf(stderr, 95 "usage: installboot [-n] [-v] [-h] <boot> <proto> <device>\n"); 96 exit(1); 97 } 98 99 int 100 main(argc, argv) 101 int argc; 102 char *argv[]; 103 { 104 int c; 105 int devfd; 106 char *protostore; 107 size_t protosize; 108 109 while ((c = getopt(argc, argv, "vnh")) != -1) { 110 switch (c) { 111 case 'h': 112 /* Don't strip a.out header */ 113 hflag = 1; 114 break; 115 case 'n': 116 /* Do not actually write the bootblock to disk */ 117 nowrite = 1; 118 break; 119 case 'v': 120 /* Chat */ 121 verbose = 1; 122 break; 123 default: 124 usage(); 125 } 126 } 127 128 if (argc - optind < 3) { 129 usage(); 130 } 131 132 boot = argv[optind]; 133 proto = argv[optind + 1]; 134 dev = argv[optind + 2]; 135 136 if (verbose) { 137 printf("boot: %s\n", boot); 138 printf("proto: %s\n", proto); 139 printf("device: %s\n", dev); 140 } 141 142 /* Load proto blocks into core */ 143 if ((protostore = loadprotoblocks(proto, &protosize)) == NULL) 144 exit(1); 145 146 /* XXX - Paranoia: Make sure size is aligned! */ 147 if (protosize & (DEV_BSIZE - 1)) 148 err(1, "proto bootblock bad size=%d", protosize); 149 150 /* Open and check raw disk device */ 151 if ((devfd = open(dev, O_RDONLY, 0)) < 0) 152 err(1, "open: %s", dev); 153 154 /* Extract and load block numbers */ 155 if (loadblocknums(boot, devfd) != 0) 156 exit(1); 157 158 (void)close(devfd); 159 160 if (nowrite) 161 return 0; 162 163 /* Write patched proto bootblocks into the superblock */ 164 if (protosize > SBLOCKSIZE - DEV_BSIZE) 165 errx(1, "proto bootblocks too big"); 166 167 /* The primary bootblock needs to be written to the raw partition */ 168 dev[strlen(dev) - 1] = 'a' + RAW_PART; 169 170 if ((devfd = open(dev, O_RDWR, 0)) < 0) 171 err(1, "open: %s", dev); 172 173 if (lseek(devfd, DEV_BSIZE, SEEK_SET) != DEV_BSIZE) 174 err(1, "lseek bootstrap"); 175 176 /* Sync filesystems (to clean in-memory superblock?) */ 177 sync(); 178 179 if (write(devfd, protostore, protosize) != protosize) 180 err(1, "write bootstrap"); 181 (void)close(devfd); 182 return 0; 183 } 184 185 char * 186 loadprotoblocks(fname, size) 187 char *fname; 188 size_t *size; 189 { 190 int fd; 191 u_long marks[MARK_MAX], bp, offs; 192 193 fd = -1; 194 195 /* Locate block number array in proto file */ 196 if (nlist(fname, nl) != 0) { 197 warnx("nlist: %s: symbols not found", fname); 198 return NULL; 199 } 200 201 marks[MARK_START] = 0; 202 if ((fd = loadfile(fname, marks, COUNT_TEXT|COUNT_DATA)) == -1) 203 return NULL; 204 (void)close(fd); 205 206 *size = roundup(marks[MARK_END] - marks[MARK_START], DEV_BSIZE); 207 bp = (u_long)malloc(*size); 208 209 offs = marks[MARK_START]; 210 marks[MARK_START] = bp - offs; 211 212 if ((fd = loadfile(fname, marks, LOAD_TEXT|LOAD_DATA)) == -1) 213 return NULL; 214 (void)close(fd); 215 216 /* Calculate the symbols' locations within the proto file */ 217 block_size_p = (int *) (bp + (nl[X_BLOCK_SIZE ].n_value - offs)); 218 block_count_p = (int *) (bp + (nl[X_BLOCK_COUNT].n_value - offs)); 219 /* XXX ondisk32 */ 220 block_table = (int32_t *) (bp + (nl[X_BLOCK_TABLE].n_value - offs)); 221 maxblocknum = *block_count_p; 222 223 if (verbose) { 224 printf("%s: entry point %#lx\n", fname, marks[MARK_ENTRY]); 225 printf("proto bootblock size %d\n", *size); 226 printf("room for %d filesystem blocks at %#lx\n", 227 maxblocknum, nl[X_BLOCK_TABLE].n_value); 228 } 229 230 return (char *) bp; 231 232 if (bp) 233 free((void *)bp); 234 return NULL; 235 } 236 237 static void 238 devread(fd, buf, blk, size, msg) 239 int fd; 240 void *buf; 241 daddr_t blk; 242 size_t size; 243 char *msg; 244 { 245 if (lseek(fd, dbtob(blk), SEEK_SET) != dbtob(blk)) 246 err(1, "%s: devread: lseek", msg); 247 248 if (read(fd, buf, size) != size) 249 err(1, "%s: devread: read", msg); 250 } 251 252 static char sblock[SBLOCKSIZE]; 253 254 int 255 loadblocknums(boot, devfd) 256 char *boot; 257 int devfd; 258 { 259 int i, fd; 260 struct stat statbuf; 261 struct statfs statfsbuf; 262 struct fs *fs; 263 char *buf; 264 daddr_t blk, *ap; 265 struct ufs1_dinode *ip; 266 int ndb; 267 268 /* 269 * Open 2nd-level boot program and record the block numbers 270 * it occupies on the filesystem represented by `devfd'. 271 */ 272 273 /* Make sure the (probably new) boot file is on disk. */ 274 sync(); sleep(1); 275 276 if ((fd = open(boot, O_RDONLY)) < 0) 277 err(1, "open: %s", boot); 278 279 if (fstatfs(fd, &statfsbuf) != 0) 280 err(1, "statfs: %s", boot); 281 282 if (strncmp(statfsbuf.f_fstypename, "ffs", MFSNAMELEN) && 283 strncmp(statfsbuf.f_fstypename, "ufs", MFSNAMELEN) ) { 284 errx(1, "%s: must be on an FFS filesystem", boot); 285 } 286 287 if (fsync(fd) != 0) 288 err(1, "fsync: %s", boot); 289 290 if (fstat(fd, &statbuf) != 0) 291 err(1, "fstat: %s", boot); 292 293 close(fd); 294 295 /* Read superblock */ 296 devread(devfd, sblock, (daddr_t)(BBSIZE / DEV_BSIZE), 297 SBLOCKSIZE, "superblock"); 298 fs = (struct fs *)sblock; 299 300 /* Sanity-check super-block. */ 301 if (fs->fs_magic != FS_UFS1_MAGIC) 302 errx(1, "Bad magic number in superblock, must be UFS1"); 303 if (fs->fs_inopb <= 0) 304 err(1, "Bad inopb=%d in superblock", fs->fs_inopb); 305 306 /* Read inode */ 307 if ((buf = malloc(fs->fs_bsize)) == NULL) 308 errx(1, "No memory for filesystem block"); 309 310 blk = fsbtodb(fs, ino_to_fsba(fs, statbuf.st_ino)); 311 devread(devfd, buf, blk, fs->fs_bsize, "inode"); 312 ip = (struct ufs1_dinode *)(buf) + ino_to_fsbo(fs, statbuf.st_ino); 313 314 /* 315 * Have the inode. Figure out how many blocks we need. 316 */ 317 ndb = howmany(ip->di_size, fs->fs_bsize); 318 if (ndb > maxblocknum) 319 errx(1, "Too many blocks"); 320 *block_count_p = ndb; 321 *block_size_p = fs->fs_bsize; 322 if (verbose) 323 printf("Will load %d blocks of size %d each.\n", 324 ndb, fs->fs_bsize); 325 326 /* 327 * Get the block numbers; we don't handle fragments 328 */ 329 ap = ip->di_db; 330 for (i = 0; i < NDADDR && *ap && ndb; i++, ap++, ndb--) { 331 blk = fsbtodb(fs, *ap); 332 if (verbose) 333 printf("%d: %d\n", i, blk); 334 block_table[i] = blk; 335 } 336 if (ndb == 0) 337 return 0; 338 339 /* 340 * Just one level of indirections; there isn't much room 341 * for more in the 1st-level bootblocks anyway. 342 */ 343 blk = fsbtodb(fs, ip->di_ib[0]); 344 devread(devfd, buf, blk, fs->fs_bsize, "indirect block"); 345 /* XXX ondisk32 */ 346 ap = (int32_t *)buf; 347 for (; i < NINDIR(fs) && *ap && ndb; i++, ap++, ndb--) { 348 blk = fsbtodb(fs, *ap); 349 if (verbose) 350 printf("%d: %d\n", i, blk); 351 block_table[i] = blk; 352 } 353 354 return 0; 355 } 356 357