newfs.c revision 1.8
1 /* $NetBSD: newfs.c,v 1.8 2001/11/01 07:44:05 lukem 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1989, 1992, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)newfs.c 8.5 (Berkeley) 5/24/95"; 45 #else 46 __RCSID("$NetBSD: newfs.c,v 1.8 2001/11/01 07:44:05 lukem Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * newfs: friendly front end to mkfs 52 */ 53 #include <sys/param.h> 54 #include <sys/ucred.h> 55 #include <sys/stat.h> 56 #include <sys/ioctl.h> 57 #include <sys/disklabel.h> 58 #include <sys/file.h> 59 #include <sys/mount.h> 60 #include <sys/sysctl.h> 61 #include <sys/time.h> 62 63 #include <ufs/ufs/dir.h> 64 #include <ufs/ufs/dinode.h> 65 #include <ufs/lfs/lfs.h> 66 67 #include <disktab.h> 68 #include <errno.h> 69 #include <unistd.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <ctype.h> 73 #include <string.h> 74 #include <paths.h> 75 #include <util.h> 76 #include "config.h" 77 #include "extern.h" 78 79 #define COMPAT /* allow non-labeled disks */ 80 81 int Nflag = 0; /* run without writing file system */ 82 int fssize; /* file system size */ 83 int sectorsize; /* bytes/sector */ 84 int fsize = 0; /* fragment size */ 85 int bsize = 0; /* block size */ 86 int ibsize = 0; /* inode block size */ 87 int interleave = 0; /* segment interleave */ 88 int minfree = MINFREE; /* free space threshold */ 89 int minfreeseg = 0; /* free segments reserved for the cleaner */ 90 u_int32_t roll_id = 0; /* roll-forward id */ 91 u_long memleft; /* virtual memory available */ 92 caddr_t membase; /* start address of memory based filesystem */ 93 #ifdef COMPAT 94 char *disktype; 95 int unlabeled; 96 #endif 97 98 char device[MAXPATHLEN]; 99 char *progname, *special; 100 101 static struct disklabel *getdisklabel(char *, int); 102 static struct disklabel *debug_readlabel(int); 103 #ifdef notdef 104 static void rewritelabel(char *, int, struct disklabel *); 105 #endif 106 static void usage(void); 107 108 /* CHUNKSIZE should be larger than MAXPHYS */ 109 #define CHUNKSIZE (1024 * 1024) 110 111 static size_t 112 auto_segsize(int fd, off_t len, int version) 113 { 114 off_t off, bw; 115 time_t start, finish; 116 char buf[CHUNKSIZE]; 117 long seeks; 118 size_t final; 119 int i; 120 121 /* First, get sequential access bandwidth */ 122 time(&start); 123 finish = start; 124 for (off = 0; finish - start < 10; off += CHUNKSIZE) { 125 if (pread(fd, buf, CHUNKSIZE, off) < 0) 126 break; 127 time(&finish); 128 } 129 /* Bandwidth = bytes / sec */ 130 /* printf("%ld bytes in %ld seconds\n", (long)off, (long)(finish - start)); */ 131 bw = off / (finish - start); 132 133 /* Second, seek time */ 134 time(&start); 135 finish = start; /* structure copy */ 136 for (seeks = 0; finish - start < 10; ) { 137 off = (((double)rand()) * len) / (off_t)RAND_MAX; 138 if (pread(fd, buf, dbtob(1), off) < 0) 139 break; 140 time(&finish); 141 ++seeks; 142 } 143 /* printf("%ld seeks in %ld seconds\n", (long)seeks, (long)(finish - start)); */ 144 /* Seek time in units/sec */ 145 seeks /= (finish - start); 146 if (seeks == 0) 147 seeks = 1; 148 149 printf("bw = %ld B/s, seek time %ld ms (%ld seeks/s)\n", 150 (long)bw, 1000/seeks, seeks); 151 final = dbtob(btodb(4 * bw / seeks)); 152 if (version == 1) { 153 for (i = 0; final; final >>= 1, i++) 154 ; 155 final = 1 << i; 156 } 157 printf("using initial segment size %ld\n", (long)final); 158 return final; 159 } 160 161 int 162 main(int argc, char **argv) 163 { 164 int version, ch; 165 struct partition *pp; 166 struct disklabel *lp; 167 struct stat st; 168 int debug, force, fsi, fso, segsize, maxpartitions; 169 daddr_t start; 170 char *cp, *opstring; 171 172 version = DFL_VERSION; /* what version of lfs to make */ 173 174 if ((progname = strrchr(*argv, '/')) != NULL) 175 ++progname; 176 else 177 progname = *argv; 178 179 maxpartitions = getmaxpartitions(); 180 if (maxpartitions > 26) 181 fatal("insane maxpartitions value %d", maxpartitions); 182 183 opstring = "AB:b:DFf:I:i:LM:m:NO:r:s:v:"; 184 185 debug = force = segsize = start = 0; 186 while ((ch = getopt(argc, argv, opstring)) != -1) 187 switch(ch) { 188 case 'A': /* Adaptively configure segment size */ 189 segsize = -1; 190 break; 191 case 'B': /* LFS segment size */ 192 if ((segsize = atoi(optarg)) < LFS_MINSEGSIZE) 193 fatal("%s: bad segment size", optarg); 194 break; 195 case 'D': 196 debug = 1; 197 break; 198 case 'F': 199 force = 1; 200 break; 201 case 'I': 202 interleave = atoi(optarg); 203 break; 204 case 'L': /* Compatibility only */ 205 break; 206 case 'M': 207 minfreeseg = atoi(optarg); 208 break; 209 case 'N': 210 Nflag++; 211 break; 212 case 'O': 213 start = atoi(optarg); 214 break; 215 #ifdef COMPAT 216 case 'T': 217 disktype = optarg; 218 break; 219 #endif 220 case 'b': 221 if ((bsize = atoi(optarg)) < LFS_MINBLOCKSIZE) 222 fatal("%s: bad block size", optarg); 223 break; 224 case 'f': 225 if ((fsize = atoi(optarg)) <= 0) 226 fatal("%s: bad frag size", optarg); 227 break; 228 case 'i': 229 if ((ibsize = atoi(optarg)) <= 0) 230 fatal("%s: bad inode block size", optarg); 231 break; 232 case 'm': 233 if ((minfree = atoi(optarg)) < 0 || minfree > 99) 234 fatal("%s: bad free space %%\n", optarg); 235 break; 236 case 'r': 237 if ((roll_id = strtoul(optarg, NULL, 0)) == 0) 238 fatal("%s: bad roll-forward id\n", optarg); 239 break; 240 case 's': 241 if ((fssize = atoi(optarg)) <= 0) 242 fatal("%s: bad file system size", optarg); 243 break; 244 case 'v': 245 version = atoi(optarg); 246 if (version <= 0 || version > LFS_VERSION) 247 fatal("%s: bad version", optarg); 248 break; 249 case '?': 250 default: 251 usage(); 252 } 253 argc -= optind; 254 argv += optind; 255 256 if (argc != 2 && argc != 1) 257 usage(); 258 259 /* 260 * If the -N flag isn't specified, open the output file. If no path 261 * prefix, try /dev/r%s and then /dev/%s. 262 */ 263 special = argv[0]; 264 if (strchr(special, '/') == NULL) { 265 (void)snprintf(device, sizeof(device), "%sr%s", _PATH_DEV, 266 special); 267 if (stat(device, &st) == -1) 268 (void)snprintf(device, sizeof(device), "%s%s", 269 _PATH_DEV, special); 270 special = device; 271 } 272 if (!Nflag) { 273 fso = open(special, 274 (debug ? O_CREAT : 0) | O_WRONLY, DEFFILEMODE); 275 if (fso < 0) 276 fatal("%s: %s", special, strerror(errno)); 277 } else 278 fso = -1; 279 280 /* Open the input file. */ 281 fsi = open(special, O_RDONLY); 282 if (fsi < 0) 283 fatal("%s: %s", special, strerror(errno)); 284 if (fstat(fsi, &st) < 0) 285 fatal("%s: %s", special, strerror(errno)); 286 287 288 if (!debug && !S_ISCHR(st.st_mode)) 289 (void)printf("%s: %s: not a character-special device\n", 290 progname, special); 291 cp = strchr(argv[0], '\0') - 1; 292 if (!debug 293 && (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1)) 294 && !isdigit(*cp)))) 295 fatal("%s: can't figure out file system partition", argv[0]); 296 297 #ifdef COMPAT 298 if (disktype == NULL) 299 disktype = argv[1]; 300 #endif 301 if (debug) 302 lp = debug_readlabel(fsi); 303 else 304 lp = getdisklabel(special, fsi); 305 306 if (isdigit(*cp)) 307 pp = &lp->d_partitions[0]; 308 else 309 pp = &lp->d_partitions[*cp - 'a']; 310 if (pp->p_size == 0) 311 fatal("%s: `%c' partition is unavailable", argv[0], *cp); 312 313 /* If force, make the partition look like an LFS */ 314 if(force) { 315 pp->p_fstype = FS_BSDLFS; 316 /* 0 means to use defaults */ 317 pp->p_fsize = 0; 318 pp->p_frag = 0; 319 pp->p_sgs = 0; 320 } 321 322 /* Try autoconfiguring segment size, if asked to */ 323 if (segsize == -1) 324 segsize = auto_segsize(fsi, dbtob(pp->p_size), version); 325 326 /* If we're making a LFS, we break out here */ 327 exit(make_lfs(fso, lp, pp, minfree, bsize, fsize, segsize, 328 minfreeseg, version, start, ibsize, interleave, 329 roll_id)); 330 } 331 332 #ifdef COMPAT 333 char lmsg[] = "%s: can't read disk label; disk type must be specified"; 334 #else 335 char lmsg[] = "%s: can't read disk label"; 336 #endif 337 338 static struct disklabel * 339 getdisklabel(char *s, int fd) 340 { 341 static struct disklabel lab; 342 343 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 344 #ifdef COMPAT 345 if (disktype) { 346 struct disklabel *lp; 347 348 unlabeled++; 349 lp = getdiskbyname(disktype); 350 if (lp == NULL) 351 fatal("%s: unknown disk type", disktype); 352 return (lp); 353 } 354 #endif 355 (void)fprintf(stderr, 356 "%s: ioctl (GDINFO): %s\n", progname, strerror(errno)); 357 fatal(lmsg, s); 358 } 359 return (&lab); 360 } 361 362 363 static struct disklabel * 364 debug_readlabel(int fd) 365 { 366 static struct disklabel lab; 367 int n; 368 369 if ((n = read(fd, &lab, sizeof(struct disklabel))) < 0) 370 fatal("unable to read disk label: %s", strerror(errno)); 371 else if (n < sizeof(struct disklabel)) 372 fatal("short read of disklabel: %d of %ld bytes", n, 373 (u_long) sizeof(struct disklabel)); 374 return(&lab); 375 } 376 377 #ifdef notdef 378 static void 379 rewritelabel(char *s, int fd, struct disklabel *lp) 380 { 381 #ifdef COMPAT 382 if (unlabeled) 383 return; 384 #endif 385 lp->d_checksum = 0; 386 lp->d_checksum = dkcksum(lp); 387 if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) { 388 (void)fprintf(stderr, 389 "%s: ioctl (WDINFO): %s\n", progname, strerror(errno)); 390 fatal("%s: can't rewrite disk label", s); 391 } 392 #if __vax__ 393 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) { 394 int i; 395 int cfd; 396 daddr_t alt; 397 char specname[64]; 398 char blk[1024]; 399 char *cp; 400 401 /* 402 * Make name for 'c' partition. 403 */ 404 strcpy(specname, s); 405 cp = specname + strlen(specname) - 1; 406 if (!isdigit(*cp)) 407 *cp = 'c'; 408 cfd = open(specname, O_WRONLY); 409 if (cfd < 0) 410 fatal("%s: %s", specname, strerror(errno)); 411 memset(blk, 0, sizeof(blk)); 412 *(struct disklabel *)(blk + LABELOFFSET) = *lp; 413 alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors; 414 for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) { 415 if (lseek(cfd, (off_t)((alt + i) * lp->d_secsize), 416 SEEK_SET) == -1) 417 fatal("lseek to badsector area: %s", 418 strerror(errno)); 419 if (write(cfd, blk, lp->d_secsize) < lp->d_secsize) 420 fprintf(stderr, 421 "%s: alternate label %d write: %s\n", 422 progname, i/2, strerror(errno)); 423 } 424 close(cfd); 425 } 426 #endif /* vax */ 427 } 428 #endif /* notdef */ 429 430 void 431 usage() 432 { 433 fprintf(stderr, "usage: newfs_lfs [ -fsoptions ] special-device\n"); 434 fprintf(stderr, "where fsoptions are:\n"); 435 fprintf(stderr, "\t-A (autoconfigure segment size)\n"); 436 fprintf(stderr, "\t-B segment size in bytes\n"); 437 fprintf(stderr, "\t-D (debug)\n"); 438 fprintf(stderr, 439 "\t-N (do not create file system, just print out parameters)\n"); 440 fprintf(stderr, "\t-O first segment offset in sectors\n"); 441 fprintf(stderr, "\t-b block size in bytes\n"); 442 fprintf(stderr, "\t-f frag size in bytes\n"); 443 fprintf(stderr, "\t-m minimum free space %%\n"); 444 fprintf(stderr, "\t-s file system size in sectors\n"); 445 fprintf(stderr, "\t-v version\n"); 446 exit(1); 447 } 448
Indexes created Tue Oct 21 16:10:11 GMT 2025