newfs.c revision 1.12
1 /* $NetBSD: newfs.c,v 1.12 2003/08/07 10:04:35 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1989, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1989, 1992, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)newfs.c 8.5 (Berkeley) 5/24/95"; 41 #else 42 __RCSID("$NetBSD: newfs.c,v 1.12 2003/08/07 10:04:35 agc Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 /* 47 * newfs: friendly front end to mkfs 48 */ 49 #include <sys/param.h> 50 #include <sys/ucred.h> 51 #include <sys/stat.h> 52 #include <sys/ioctl.h> 53 #include <sys/disklabel.h> 54 #include <sys/file.h> 55 #include <sys/mount.h> 56 #include <sys/sysctl.h> 57 #include <sys/time.h> 58 59 #include <ufs/ufs/dir.h> 60 #include <ufs/ufs/dinode.h> 61 #include <ufs/lfs/lfs.h> 62 63 #include <disktab.h> 64 #include <err.h> 65 #include <errno.h> 66 #include <unistd.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <ctype.h> 70 #include <string.h> 71 #include <paths.h> 72 #include <util.h> 73 #include "config.h" 74 #include "extern.h" 75 76 #define COMPAT /* allow non-labeled disks */ 77 78 int Nflag = 0; /* run without writing file system */ 79 int fssize; /* file system size */ 80 int sectorsize; /* bytes/sector */ 81 int fsize = 0; /* fragment size */ 82 int bsize = 0; /* block size */ 83 int ibsize = 0; /* inode block size */ 84 int interleave = 0; /* segment interleave */ 85 int minfree = MINFREE; /* free space threshold */ 86 int minfreeseg = 0; /* free segments reserved for the cleaner */ 87 u_int32_t roll_id = 0; /* roll-forward id */ 88 u_long memleft; /* virtual memory available */ 89 caddr_t membase; /* start address of memory based filesystem */ 90 #ifdef COMPAT 91 char *disktype; 92 int unlabeled; 93 #endif 94 95 char device[MAXPATHLEN]; 96 char *progname, *special; 97 98 static struct disklabel *getdisklabel(char *, int); 99 static struct disklabel *debug_readlabel(int); 100 #ifdef notdef 101 static void rewritelabel(char *, int, struct disklabel *); 102 #endif 103 static void usage(void); 104 105 /* CHUNKSIZE should be larger than MAXPHYS */ 106 #define CHUNKSIZE (1024 * 1024) 107 108 static size_t 109 auto_segsize(int fd, off_t len, int version) 110 { 111 off_t off, bw; 112 time_t start, finish; 113 char buf[CHUNKSIZE]; 114 long seeks; 115 size_t final; 116 int i; 117 118 /* First, get sequential access bandwidth */ 119 time(&start); 120 finish = start; 121 for (off = 0; finish - start < 10; off += CHUNKSIZE) { 122 if (pread(fd, buf, CHUNKSIZE, off) < 0) 123 break; 124 time(&finish); 125 } 126 /* Bandwidth = bytes / sec */ 127 /* printf("%ld bytes in %ld seconds\n", (long)off, (long)(finish - start)); */ 128 bw = off / (finish - start); 129 130 /* Second, seek time */ 131 time(&start); 132 finish = start; /* structure copy */ 133 for (seeks = 0; finish - start < 10; ) { 134 off = (((double)rand()) * len) / (off_t)RAND_MAX; 135 if (pread(fd, buf, dbtob(1), off) < 0) 136 break; 137 time(&finish); 138 ++seeks; 139 } 140 /* printf("%ld seeks in %ld seconds\n", (long)seeks, (long)(finish - start)); */ 141 /* Seek time in units/sec */ 142 seeks /= (finish - start); 143 if (seeks == 0) 144 seeks = 1; 145 146 printf("bw = %ld B/s, seek time %ld ms (%ld seeks/s)\n", 147 (long)bw, 1000/seeks, seeks); 148 final = dbtob(btodb(4 * bw / seeks)); 149 if (version == 1) { 150 for (i = 0; final; final >>= 1, i++) 151 ; 152 final = 1 << i; 153 } 154 printf("using initial segment size %ld\n", (long)final); 155 return final; 156 } 157 158 int 159 main(int argc, char **argv) 160 { 161 int version, ch; 162 struct partition *pp; 163 struct disklabel *lp; 164 struct stat st; 165 int debug, force, fsi, fso, segsize, maxpartitions; 166 daddr_t start; 167 char *cp, *opstring; 168 169 version = DFL_VERSION; /* what version of lfs to make */ 170 171 if ((progname = strrchr(*argv, '/')) != NULL) 172 ++progname; 173 else 174 progname = *argv; 175 176 maxpartitions = getmaxpartitions(); 177 if (maxpartitions > 26) 178 fatal("insane maxpartitions value %d", maxpartitions); 179 180 opstring = "AB:b:DFf:I:i:LM:m:NO:r:s:v:"; 181 182 debug = force = segsize = start = 0; 183 while ((ch = getopt(argc, argv, opstring)) != -1) 184 switch(ch) { 185 case 'A': /* Adaptively configure segment size */ 186 segsize = -1; 187 break; 188 case 'B': /* LFS segment size */ 189 if ((segsize = atoi(optarg)) < LFS_MINSEGSIZE) 190 fatal("%s: bad segment size", optarg); 191 break; 192 case 'D': 193 debug = 1; 194 break; 195 case 'F': 196 force = 1; 197 break; 198 case 'I': 199 interleave = atoi(optarg); 200 break; 201 case 'L': /* Compatibility only */ 202 break; 203 case 'M': 204 minfreeseg = atoi(optarg); 205 break; 206 case 'N': 207 Nflag++; 208 break; 209 case 'O': 210 start = atoi(optarg); 211 break; 212 #ifdef COMPAT 213 case 'T': 214 disktype = optarg; 215 break; 216 #endif 217 case 'b': 218 if ((bsize = atoi(optarg)) < LFS_MINBLOCKSIZE) 219 fatal("%s: bad block size", optarg); 220 break; 221 case 'f': 222 if ((fsize = atoi(optarg)) <= 0) 223 fatal("%s: bad frag size", optarg); 224 break; 225 case 'i': 226 if ((ibsize = atoi(optarg)) <= 0) 227 fatal("%s: bad inode block size", optarg); 228 break; 229 case 'm': 230 if ((minfree = atoi(optarg)) < 0 || minfree > 99) 231 fatal("%s: bad free space %%\n", optarg); 232 break; 233 case 'r': 234 if ((roll_id = strtoul(optarg, NULL, 0)) == 0) 235 fatal("%s: bad roll-forward id\n", optarg); 236 break; 237 case 's': 238 if ((fssize = atoi(optarg)) <= 0) 239 fatal("%s: bad file system size", optarg); 240 break; 241 case 'v': 242 version = atoi(optarg); 243 if (version <= 0 || version > LFS_VERSION) 244 fatal("%s: bad version", optarg); 245 break; 246 case '?': 247 default: 248 usage(); 249 } 250 argc -= optind; 251 argv += optind; 252 253 if (argc != 2 && argc != 1) 254 usage(); 255 256 /* 257 * If the -N flag isn't specified, open the output file. If no path 258 * prefix, try /dev/r%s and then /dev/%s. 259 */ 260 special = argv[0]; 261 if (strchr(special, '/') == NULL) { 262 (void)snprintf(device, sizeof(device), "%sr%s", _PATH_DEV, 263 special); 264 if (stat(device, &st) == -1) 265 (void)snprintf(device, sizeof(device), "%s%s", 266 _PATH_DEV, special); 267 special = device; 268 } 269 if (!Nflag) { 270 fso = open(special, 271 (debug ? O_CREAT : 0) | O_WRONLY, DEFFILEMODE); 272 if (fso < 0) 273 fatal("%s: %s", special, strerror(errno)); 274 } else 275 fso = -1; 276 277 /* Open the input file. */ 278 fsi = open(special, O_RDONLY); 279 if (fsi < 0) 280 fatal("%s: %s", special, strerror(errno)); 281 if (fstat(fsi, &st) < 0) 282 fatal("%s: %s", special, strerror(errno)); 283 284 285 if (!debug && !S_ISCHR(st.st_mode)) 286 (void)printf("%s: %s: not a character-special device\n", 287 progname, special); 288 cp = strchr(argv[0], '\0') - 1; 289 if (!debug 290 && (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1)) 291 && !isdigit(*cp)))) 292 fatal("%s: can't figure out file system partition", argv[0]); 293 294 #ifdef COMPAT 295 if (disktype == NULL) 296 disktype = argv[1]; 297 #endif 298 if (debug) 299 lp = debug_readlabel(fsi); 300 else 301 lp = getdisklabel(special, fsi); 302 303 if (isdigit(*cp)) 304 pp = &lp->d_partitions[0]; 305 else 306 pp = &lp->d_partitions[*cp - 'a']; 307 if (pp->p_size == 0) 308 fatal("%s: `%c' partition is unavailable", argv[0], *cp); 309 310 /* If force, make the partition look like an LFS */ 311 if(force) { 312 pp->p_fstype = FS_BSDLFS; 313 /* 0 means to use defaults */ 314 pp->p_fsize = 0; 315 pp->p_frag = 0; 316 pp->p_sgs = 0; 317 } 318 319 /* Try autoconfiguring segment size, if asked to */ 320 if (segsize == -1) { 321 if (!S_ISCHR(st.st_mode)) { 322 warnx("%s is not a character special device, ignoring -A", special); 323 segsize = 0; 324 } else 325 segsize = auto_segsize(fsi, dbtob(pp->p_size), version); 326 } 327 328 /* If we're making a LFS, we break out here */ 329 exit(make_lfs(fso, lp, pp, minfree, bsize, fsize, segsize, 330 minfreeseg, version, start, ibsize, interleave, 331 roll_id)); 332 } 333 334 #ifdef COMPAT 335 char lmsg[] = "%s: can't read disk label; disk type must be specified"; 336 #else 337 char lmsg[] = "%s: can't read disk label"; 338 #endif 339 340 static struct disklabel * 341 getdisklabel(char *s, int fd) 342 { 343 static struct disklabel lab; 344 345 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 346 #ifdef COMPAT 347 if (disktype) { 348 struct disklabel *lp; 349 350 unlabeled++; 351 lp = getdiskbyname(disktype); 352 if (lp == NULL) 353 fatal("%s: unknown disk type", disktype); 354 return (lp); 355 } 356 #endif 357 (void)fprintf(stderr, 358 "%s: ioctl (GDINFO): %s\n", progname, strerror(errno)); 359 fatal(lmsg, s); 360 } 361 return (&lab); 362 } 363 364 365 static struct disklabel * 366 debug_readlabel(int fd) 367 { 368 static struct disklabel lab; 369 int n; 370 371 if ((n = read(fd, &lab, sizeof(struct disklabel))) < 0) 372 fatal("unable to read disk label: %s", strerror(errno)); 373 else if (n < sizeof(struct disklabel)) 374 fatal("short read of disklabel: %d of %ld bytes", n, 375 (u_long) sizeof(struct disklabel)); 376 return(&lab); 377 } 378 379 #ifdef notdef 380 static void 381 rewritelabel(char *s, int fd, struct disklabel *lp) 382 { 383 #ifdef COMPAT 384 if (unlabeled) 385 return; 386 #endif 387 lp->d_checksum = 0; 388 lp->d_checksum = dkcksum(lp); 389 if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) { 390 (void)fprintf(stderr, 391 "%s: ioctl (WDINFO): %s\n", progname, strerror(errno)); 392 fatal("%s: can't rewrite disk label", s); 393 } 394 #if __vax__ 395 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) { 396 int i; 397 int cfd; 398 daddr_t alt; 399 off_t loff; 400 char specname[64]; 401 char blk[1024]; 402 char *cp; 403 404 /* 405 * Make name for 'c' partition. 406 */ 407 strlcpy(specname, s, sizeof(specname)); 408 cp = specname + strlen(specname) - 1; 409 if (!isdigit(*cp)) 410 *cp = 'c'; 411 cfd = open(specname, O_WRONLY); 412 if (cfd < 0) 413 fatal("%s: %s", specname, strerror(errno)); 414 if ((loff = getlabeloffset()) < 0) 415 fatal("getlabeloffset: %s", strerror(errno)); 416 memset(blk, 0, sizeof(blk)); 417 *(struct disklabel *)(blk + loff) = *lp; 418 alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors; 419 for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) { 420 if (lseek(cfd, (off_t)((alt + i) * lp->d_secsize), 421 SEEK_SET) == -1) 422 fatal("lseek to badsector area: %s", 423 strerror(errno)); 424 if (write(cfd, blk, lp->d_secsize) < lp->d_secsize) 425 fprintf(stderr, 426 "%s: alternate label %d write: %s\n", 427 progname, i/2, strerror(errno)); 428 } 429 close(cfd); 430 } 431 #endif /* vax */ 432 } 433 #endif /* notdef */ 434 435 void 436 usage() 437 { 438 fprintf(stderr, "usage: newfs_lfs [ -fsoptions ] special-device\n"); 439 fprintf(stderr, "where fsoptions are:\n"); 440 fprintf(stderr, "\t-A (autoconfigure segment size)\n"); 441 fprintf(stderr, "\t-B segment size in bytes\n"); 442 fprintf(stderr, "\t-D (debug)\n"); 443 fprintf(stderr, 444 "\t-N (do not create file system, just print out parameters)\n"); 445 fprintf(stderr, "\t-O first segment offset in sectors\n"); 446 fprintf(stderr, "\t-b block size in bytes\n"); 447 fprintf(stderr, "\t-f frag size in bytes\n"); 448 fprintf(stderr, "\t-m minimum free space %%\n"); 449 fprintf(stderr, "\t-s file system size in sectors\n"); 450 fprintf(stderr, "\t-v version\n"); 451 exit(1); 452 } 453
Indexes created Wed Oct 22 13:09:56 GMT 2025