newfs_ext2fs.c revision 1.3
1 /* $NetBSD: newfs_ext2fs.c,v 1.3 2007/12/15 19:44:47 perry Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1989, 1993, 1994 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) 1983, 1989, 1993, 1994\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 8.13 (Berkeley) 5/1/95"; 41 #else 42 __RCSID("$NetBSD: newfs_ext2fs.c,v 1.3 2007/12/15 19:44:47 perry Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 /* 47 * newfs: friendly front end to mke2fs 48 */ 49 #include <sys/param.h> 50 #include <sys/ioctl.h> 51 #include <sys/disklabel.h> 52 #include <sys/disk.h> 53 #include <sys/file.h> 54 #include <sys/mount.h> 55 56 #include <ufs/ext2fs/ext2fs.h> 57 58 #include <disktab.h> 59 #include <err.h> 60 #include <errno.h> 61 #include <limits.h> 62 #include <paths.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #include <util.h> 68 #include <mntopts.h> 69 70 #include "extern.h" 71 #include "partutil.h" 72 73 static int64_t strsuftoi64(const char *, const char *, int64_t, int64_t, int *); 74 static void usage(void) __dead; 75 76 /* 77 * For file systems smaller than SMALL_FSSIZE we use the S_DFL_* defaults, 78 * otherwise if less than MEDIUM_FSSIZE use M_DFL_*, otherwise use 79 * L_DFL_*. 80 */ 81 #define SMALL_FSSIZE ((4 * 1024 * 1024) / sectorsize) /* 4MB */ 82 #define S_DFL_BSIZE 1024 83 #define MEDIUM_FSSIZE ((512 * 1024 * 1024) / sectorsize) /* 512MB */ 84 #define M_DFL_BSIZE 1024 85 #define L_DFL_BSIZE 4096 86 87 /* 88 * Each file system has a number of inodes statically allocated. 89 * We allocate one inode slot per 2, 4, or 8 blocks, expecting this 90 * to be far more than we will ever need. 91 */ 92 #define S_DFL_NINODE(blocks) ((blocks) / 8) 93 #define M_DFL_NINODE(blocks) ((blocks) / 4) 94 #define L_DFL_NINODE(blocks) ((blocks) / 2) 95 96 /* 97 * Default sector size. 98 */ 99 #define DFL_SECSIZE 512 100 101 int Nflag; /* run without writing file system */ 102 int Oflag = 0; /* format as conservative REV0 by default */ 103 int verbosity; /* amount of printf() output */ 104 #define DEFAULT_VERBOSITY 3 /* 4 is traditional behavior of newfs(8) */ 105 int64_t fssize; /* file system size */ 106 uint sectorsize; /* bytes/sector */ 107 uint fsize = 0; /* fragment size */ 108 uint bsize = 0; /* block size */ 109 uint minfree = MINFREE; /* free space threshold */ 110 uint density; /* number of bytes per inode */ 111 uint num_inodes; /* number of inodes (overrides density) */ 112 char *volname = NULL; /* volume name */ 113 114 static char *disktype = NULL; 115 static char device[MAXPATHLEN]; 116 117 static const char lmsg[] = "%s: can't read disk label"; 118 119 int 120 main(int argc, char *argv[]) 121 { 122 struct disk_geom geo; 123 struct dkwedge_info dkw; 124 struct statvfs *mp; 125 struct stat sb; 126 int ch, fsi, fso, len, n, Fflag, Iflag, Zflag; 127 char *cp, *s1, *s2, *special; 128 const char *opstring; 129 int byte_sized; 130 uint blocks; /* number of blocks */ 131 132 cp = NULL; 133 fsi = fso = -1; 134 Fflag = Iflag = Zflag = 0; 135 verbosity = -1; 136 opstring = "FINO:S:V:Zb:f:i:l:m:n:s:v:"; 137 byte_sized = 0; 138 while ((ch = getopt(argc, argv, opstring)) != -1) 139 switch (ch) { 140 case 'F': 141 Fflag = 1; 142 break; 143 case 'I': 144 Iflag = 1; 145 break; 146 case 'N': 147 Nflag = 1; 148 if (verbosity == -1) 149 verbosity = DEFAULT_VERBOSITY; 150 break; 151 case 'O': 152 Oflag = strsuftoi64("format", optarg, 0, 1, NULL); 153 break; 154 case 'S': 155 /* 156 * XXX: 157 * non-512 byte sectors almost certainly don't work. 158 */ 159 sectorsize = strsuftoi64("sector size", 160 optarg, 512, 65536, NULL); 161 if (!powerof2(sectorsize)) 162 errx(EXIT_FAILURE, 163 "sector size `%s' is not a power of 2.", 164 optarg); 165 break; 166 case 'V': 167 verbosity = strsuftoi64("verbose", optarg, 0, 4, NULL); 168 break; 169 case 'Z': 170 Zflag = 1; 171 break; 172 case 'b': 173 bsize = strsuftoi64("block size", 174 optarg, MINBSIZE, EXT2_MAXBSIZE, NULL); 175 break; 176 case 'f': 177 fsize = strsuftoi64("fragment size", 178 optarg, MINBSIZE, EXT2_MAXBSIZE, NULL); 179 break; 180 case 'i': 181 density = strsuftoi64("bytes per inode", 182 optarg, 1, INT_MAX, NULL); 183 break; 184 case 'm': 185 minfree = strsuftoi64("free space %", 186 optarg, 0, 99, NULL); 187 break; 188 case 'n': 189 num_inodes = strsuftoi64("number of inodes", 190 optarg, 1, INT_MAX, NULL); 191 break; 192 case 's': 193 fssize = strsuftoi64("file system size", 194 optarg, INT64_MIN, INT64_MAX, &byte_sized); 195 break; 196 case 'v': 197 volname = optarg; 198 if (volname[0] == '\0') 199 errx(EXIT_FAILURE, 200 "Volume name cannot be zero length"); 201 break; 202 case '?': 203 default: 204 usage(); 205 } 206 argc -= optind; 207 argv += optind; 208 209 if (verbosity == -1) 210 /* Default to showing cg info */ 211 verbosity = DEFAULT_VERBOSITY; 212 213 if (argc != 1) 214 usage(); 215 216 memset(&sb, 0, sizeof(sb)); 217 memset(&dkw, 0, sizeof(dkw)); 218 special = argv[0]; 219 if (Fflag) { 220 int fl; 221 /* 222 * It's a file system image 223 * no label, use fixed default for sectorsize. 224 */ 225 if (sectorsize == 0) 226 sectorsize = DFL_SECSIZE; 227 228 /* creating image in a regular file */ 229 if (Nflag) 230 fl = O_RDONLY; 231 else { 232 if (fssize > 0) 233 fl = O_RDWR | O_CREAT; 234 else 235 fl = O_RDWR; 236 } 237 fsi = open(special, fl, 0777); 238 if (fsi == -1) 239 err(EXIT_FAILURE, "can't open file %s", special); 240 if (fstat(fsi, &sb) == -1) 241 err(EXIT_FAILURE, "can't fstat opened %s", special); 242 if (!Nflag) 243 fso = fsi; 244 } else { /* !Fflag */ 245 fsi = opendisk(special, O_RDONLY, device, sizeof(device), 0); 246 special = device; 247 if (fsi < 0 || fstat(fsi, &sb) == -1) 248 err(EXIT_FAILURE, "%s: open for read", special); 249 250 if (!Nflag) { 251 fso = open(special, O_WRONLY, 0); 252 if (fso < 0) 253 err(EXIT_FAILURE, 254 "%s: open for write", special); 255 256 /* Bail if target special is mounted */ 257 n = getmntinfo(&mp, MNT_NOWAIT); 258 if (n == 0) 259 err(EXIT_FAILURE, "%s: getmntinfo", special); 260 261 len = sizeof(_PATH_DEV) - 1; 262 s1 = special; 263 if (strncmp(_PATH_DEV, s1, len) == 0) 264 s1 += len; 265 266 while (--n >= 0) { 267 s2 = mp->f_mntfromname; 268 if (strncmp(_PATH_DEV, s2, len) == 0) { 269 s2 += len - 1; 270 *s2 = 'r'; 271 } 272 if (strcmp(s1, s2) == 0 || 273 strcmp(s1, &s2[1]) == 0) 274 errx(EXIT_FAILURE, 275 "%s is mounted on %s", 276 special, mp->f_mntonname); 277 ++mp; 278 } 279 } 280 281 if (getdiskinfo(special, fsi, disktype, &geo, &dkw) == -1) 282 errx(EXIT_FAILURE, lmsg, special); 283 284 if (sectorsize == 0) { 285 sectorsize = geo.dg_secsize; 286 if (sectorsize <= 0) 287 errx(EXIT_FAILURE, "no default sector size"); 288 } 289 290 if (dkw.dkw_parent[0]) { 291 if (dkw.dkw_size == 0) 292 errx(EXIT_FAILURE, 293 "%s partition is unavailable", special); 294 295 if (!Iflag) { 296 static const char m[] = 297 "%s partition type is not `%s' (or use -I)"; 298 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_EXT2FS)) 299 errx(EXIT_FAILURE, m, 300 special, "Linux Ext2"); 301 } 302 } 303 } 304 305 if (byte_sized) 306 fssize /= sectorsize; 307 if (fssize <= 0) { 308 if (sb.st_size != 0) 309 fssize += sb.st_size / sectorsize; 310 else 311 fssize += dkw.dkw_size; 312 if (fssize <= 0) 313 errx(EXIT_FAILURE, 314 "Unable to determine file system size"); 315 } 316 317 if (dkw.dkw_parent[0] && fssize > dkw.dkw_size) 318 errx(EXIT_FAILURE, 319 "size %" PRIu64 " exceeds maximum file system size on " 320 "`%s' of %" PRIu64 " sectors", 321 fssize, special, dkw.dkw_size); 322 323 /* XXXLUKEM: only ftruncate() regular files ? (dsl: or at all?) */ 324 if (Fflag && fso != -1 325 && ftruncate(fso, (off_t)fssize * sectorsize) == -1) 326 err(1, "can't ftruncate %s to %" PRId64, special, fssize); 327 328 if (Zflag && fso != -1) { /* pre-zero (and de-sparce) the file */ 329 char *buf; 330 int bufsize, i; 331 off_t bufrem; 332 struct statvfs sfs; 333 334 if (fstatvfs(fso, &sfs) == -1) { 335 warn("can't fstatvfs `%s'", special); 336 bufsize = 8192; 337 } else 338 bufsize = sfs.f_iosize; 339 340 if ((buf = calloc(1, bufsize)) == NULL) 341 err(1, "can't malloc buffer of %d", 342 bufsize); 343 bufrem = fssize * sectorsize; 344 if (verbosity > 0) 345 printf("Creating file system image in `%s', " 346 "size %" PRId64 " bytes, in %d byte chunks.\n", 347 special, bufrem, bufsize); 348 while (bufrem > 0) { 349 i = write(fso, buf, MIN(bufsize, bufrem)); 350 if (i == -1) 351 err(1, "writing image"); 352 bufrem -= i; 353 } 354 free(buf); 355 } 356 357 /* Sort out fragment and block sizes */ 358 if (bsize == 0) { 359 bsize = fsize; 360 if (bsize == 0) { 361 if (fssize < SMALL_FSSIZE) 362 bsize = S_DFL_BSIZE; 363 else if (fssize < MEDIUM_FSSIZE) 364 bsize = M_DFL_BSIZE; 365 else 366 bsize = L_DFL_BSIZE; 367 } 368 } 369 if (fsize == 0) 370 fsize = bsize; 371 372 blocks = fssize * sectorsize / bsize; 373 374 if (num_inodes == 0) { 375 if (density != 0) 376 num_inodes = fssize / density; 377 else { 378 if (fssize < SMALL_FSSIZE) 379 num_inodes = S_DFL_NINODE(blocks); 380 else if (fssize < MEDIUM_FSSIZE) 381 num_inodes = M_DFL_NINODE(blocks); 382 else 383 num_inodes = L_DFL_NINODE(blocks); 384 } 385 } 386 mke2fs(special, fsi, fso); 387 388 if (fsi != -1) 389 close(fsi); 390 if (fso != -1 && fso != fsi) 391 close(fso); 392 exit(EXIT_SUCCESS); 393 } 394 395 static int64_t 396 strsuftoi64(const char *desc, const char *arg, int64_t min, int64_t max, 397 int *num_suffix) 398 { 399 int64_t result, r1; 400 int shift = 0; 401 char *ep; 402 403 errno = 0; 404 r1 = strtoll(arg, &ep, 10); 405 if (ep[0] != '\0' && ep[1] != '\0') 406 errx(EXIT_FAILURE, 407 "%s `%s' is not a valid number.", desc, arg); 408 switch (ep[0]) { 409 case '\0': 410 case 's': 411 case 'S': 412 if (num_suffix != NULL) 413 *num_suffix = 0; 414 break; 415 case 'g': 416 case 'G': 417 shift += 10; 418 /* FALLTHROUGH */ 419 case 'm': 420 case 'M': 421 shift += 10; 422 /* FALLTHROUGH */ 423 case 'k': 424 case 'K': 425 shift += 10; 426 /* FALLTHROUGH */ 427 case 'b': 428 case 'B': 429 if (num_suffix != NULL) 430 *num_suffix = 1; 431 break; 432 default: 433 errx(EXIT_FAILURE, 434 "`%s' is not a valid suffix for %s.", ep, desc); 435 } 436 result = r1 << shift; 437 if (errno == ERANGE || result >> shift != r1) 438 errx(EXIT_FAILURE, 439 "%s `%s' is too large to convert.", desc, arg); 440 if (result < min) 441 errx(EXIT_FAILURE, 442 "%s `%s' (%" PRId64 ") is less than the minimum (%" 443 PRId64 ").", desc, arg, result, min); 444 if (result > max) 445 errx(EXIT_FAILURE, 446 "%s `%s' (%" PRId64 ") is greater than the maximum (%" 447 PRId64 ").", desc, arg, result, max); 448 return result; 449 } 450 451 static const char help_strings[] = 452 "\t-F \t\tcreate file system image in regular file\n" 453 "\t-I \t\tdo not check that the file system type is `Linux Ext2'\n" 454 "\t-N \t\tdo not create file system, just print out parameters\n" 455 "\t-O N\t\tfilesystem revision: 0 ==> REV0, 1 ==> REV1 (default 0)\n" 456 "\t-S secsize\tsector size\n" 457 "\t-V verbose\toutput verbosity: 0 ==> none, 4 ==> max\n" 458 "\t-Z \t\tpre-zero the image file\n" 459 "\t-b bsize\tblock size\n" 460 "\t-f fsize\tfragment size\n" 461 "\t-i density\tnumber of bytes per inode\n" 462 "\t-m minfree\tminimum free space %\n" 463 "\t-n inodes\tnumber of inodes (overrides -i density)\n" 464 "\t-s fssize\tfile system size (sectors)\n" 465 "\t-v volname\text2fs volume name\n"; 466 467 static void 468 usage(void) 469 { 470 471 fprintf(stderr, 472 "usage: %s [ fsoptions ] special-device\n", getprogname()); 473 fprintf(stderr, "where fsoptions are:\n"); 474 fprintf(stderr, "%s", help_strings); 475 476 exit(EXIT_FAILURE); 477 } 478
Indexes created Tue Sep 23 07:09:52 GMT 2025