tunefs.c revision 1.25
1 /* $NetBSD: tunefs.c,v 1.25 2001/11/09 09:05:52 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 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) 1983, 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[] = "@(#)tunefs.c 8.3 (Berkeley) 5/3/95"; 45 #else 46 __RCSID("$NetBSD: tunefs.c,v 1.25 2001/11/09 09:05:52 lukem Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * tunefs: change layout parameters to an existing file system. 52 */ 53 #include <sys/param.h> 54 55 #include <ufs/ufs/dinode.h> 56 #include <ufs/ffs/fs.h> 57 #include <ufs/ffs/ffs_extern.h> 58 59 #include <machine/bswap.h> 60 61 #include <err.h> 62 #include <errno.h> 63 #include <fcntl.h> 64 #include <fstab.h> 65 #include <paths.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 #include <util.h> 71 72 /* the optimization warning string template */ 73 #define OPTWARN "should optimize for %s with minfree %s %d%%" 74 75 union { 76 struct fs sb; 77 char pad[MAXBSIZE]; 78 } sbun; 79 #define sblock sbun.sb 80 char buf[MAXBSIZE]; 81 82 int fi; 83 long dev_bsize = 1; 84 int needswap = 0; 85 86 static void bwrite(daddr_t, char *, int, const char *); 87 static void bread(daddr_t, char *, int, const char *); 88 static int getnum(const char *, const char *, int, int); 89 static void getsb(struct fs *, const char *); 90 static void usage(void); 91 int main(int, char *[]); 92 93 int 94 main(int argc, char *argv[]) 95 { 96 #define OPTSTRINGBASE "AFNa:d:e:g:h:k:m:o:t:" 97 #ifdef TUNEFS_SOFTDEP 98 int softdep; 99 #define OPTSTRING OPTSTRINGBASE ## "n:" 100 #else 101 #define OPTSTRING OPTSTRINGBASE 102 #endif 103 int i, ch, Aflag, Fflag, Nflag, openflags; 104 struct fstab *fs; 105 const char *special, *chg[2]; 106 char device[MAXPATHLEN], rawspec[MAXPATHLEN], *p; 107 int maxbpg, maxcontig, minfree, rotdelay, optim, trackskew; 108 int avgfilesize, avgfpdir; 109 110 Aflag = Fflag = Nflag = 0; 111 maxbpg = maxcontig = minfree = rotdelay = optim = trackskew = -1; 112 avgfilesize = avgfpdir = -1; 113 #ifdef TUNEFS_SOFTDEP 114 softdep = -1; 115 #endif 116 chg[FS_OPTSPACE] = "space"; 117 chg[FS_OPTTIME] = "time"; 118 119 while ((ch = getopt(argc, argv, OPTSTRING)) != -1) { 120 switch (ch) { 121 122 case 'A': 123 Aflag++; 124 break; 125 126 case 'F': 127 Fflag++; 128 break; 129 130 case 'N': 131 Nflag++; 132 break; 133 134 case 'a': 135 maxcontig = getnum(optarg, 136 "maximum contiguous block count", 1, INT_MAX); 137 break; 138 139 case 'd': 140 rotdelay = getnum(optarg, 141 "rotational delay between contiguous blocks", 142 0, INT_MAX); 143 break; 144 145 case 'e': 146 maxbpg = getnum(optarg, 147 "maximum blocks per file in a cylinder group", 148 1, INT_MAX); 149 break; 150 151 case 'g': 152 avgfilesize = getnum(optarg, 153 "average file size", 1, INT_MAX); 154 break; 155 156 case 'h': 157 avgfpdir = getnum(optarg, 158 "expected number of files per directory", 159 1, INT_MAX); 160 break; 161 162 case 'm': 163 minfree = getnum(optarg, 164 "minimum percentage of free space", 0, 99); 165 break; 166 167 #ifdef TUNEFS_SOFTDEP 168 case 'n': 169 if (strcmp(optarg, "enable") == 0) 170 softdep = 1; 171 else if (strcmp(optarg, "disable") == 0) 172 softdep = 0; 173 else { 174 errx(10, "bad soft dependencies " 175 "(options are `enable' or `disable')"); 176 } 177 break; 178 #endif 179 180 case 'o': 181 if (strcmp(optarg, chg[FS_OPTSPACE]) == 0) 182 optim = FS_OPTSPACE; 183 else if (strcmp(optarg, chg[FS_OPTTIME]) == 0) 184 optim = FS_OPTTIME; 185 else 186 errx(10, 187 "bad %s (options are `space' or `time')", 188 "optimization preference"); 189 break; 190 191 case 'k': 192 case 't': /* for compatibility with old syntax */ 193 trackskew = getnum(optarg, 194 "track skew in sectors", 0, INT_MAX); 195 break; 196 197 default: 198 usage(); 199 } 200 } 201 argc -= optind; 202 argv += optind; 203 if (argc != 1) 204 usage(); 205 206 special = argv[0]; 207 openflags = Nflag ? O_RDONLY : O_RDWR; 208 if (Fflag) { 209 fi = open(special, openflags); 210 if (fi == -1) 211 err(1, "%s", special); 212 } else { 213 fs = getfsfile(special); 214 if (fs) { 215 if ((p = strrchr(fs->fs_spec, '/')) != NULL) { 216 snprintf(rawspec, sizeof(rawspec), "%.*s/r%s", 217 (int)(p - fs->fs_spec), fs->fs_spec, p + 1); 218 special = rawspec; 219 } else 220 special = fs->fs_spec; 221 } 222 fi = opendisk(special, openflags, device, sizeof(device), 0); 223 if (fi == -1) 224 err(1, "%s", errno == ENOENT ? special : device); 225 special = device; 226 } 227 getsb(&sblock, special); 228 229 #define CHANGEVAL(old, new, type, suffix) do \ 230 if ((new) != -1) { \ 231 if ((new) == (old)) \ 232 warnx("%s remains unchanged at %d%s", \ 233 (type), (old), (suffix)); \ 234 else { \ 235 warnx("%s changes from %d%s to %d%s", \ 236 (type), (old), (suffix), (new), (suffix)); \ 237 (old) = (new); \ 238 } \ 239 } while (/* CONSTCOND */0) 240 241 warnx("tuning %s", special); 242 CHANGEVAL(sblock.fs_maxcontig, maxcontig, 243 "maximum contiguous block count", ""); 244 CHANGEVAL(sblock.fs_rotdelay, rotdelay, 245 "rotational delay between contiguous blocks", "ms"); 246 CHANGEVAL(sblock.fs_maxbpg, maxbpg, 247 "maximum blocks per file in a cylinder group", ""); 248 CHANGEVAL(sblock.fs_minfree, minfree, 249 "minimum percentage of free space", "%"); 250 if (minfree != -1) { 251 if (minfree >= MINFREE && 252 sblock.fs_optim == FS_OPTSPACE) 253 warnx(OPTWARN, "time", ">=", MINFREE); 254 if (minfree < MINFREE && 255 sblock.fs_optim == FS_OPTTIME) 256 warnx(OPTWARN, "space", "<", MINFREE); 257 } 258 #ifdef TUNEFS_SOFTDEP 259 if (softdep == 1) { 260 sblock.fs_flags |= FS_DOSOFTDEP; 261 warnx("soft dependencies set"); 262 } else if (softdep == 0) { 263 sblock.fs_flags &= ~FS_DOSOFTDEP; 264 warnx("soft dependencies cleared"); 265 } 266 #endif 267 if (optim != -1) { 268 if (sblock.fs_optim == optim) { 269 warnx("%s remains unchanged as %s", 270 "optimization preference", 271 chg[optim]); 272 } else { 273 warnx("%s changes from %s to %s", 274 "optimization preference", 275 chg[sblock.fs_optim], chg[optim]); 276 sblock.fs_optim = optim; 277 if (sblock.fs_minfree >= MINFREE && 278 optim == FS_OPTSPACE) 279 warnx(OPTWARN, "time", ">=", MINFREE); 280 if (sblock.fs_minfree < MINFREE && 281 optim == FS_OPTTIME) 282 warnx(OPTWARN, "space", "<", MINFREE); 283 } 284 } 285 CHANGEVAL(sblock.fs_trackskew, trackskew, 286 "track skew in sectors", ""); 287 CHANGEVAL(sblock.fs_avgfilesize, avgfilesize, 288 "average file size", ""); 289 CHANGEVAL(sblock.fs_avgfpdir, avgfpdir, 290 "expected number of files per directory", ""); 291 292 if (Nflag) { 293 fprintf(stdout, "tunefs: current settings of %s\n", special); 294 fprintf(stdout, "\tmaximum contiguous block count %d\n", 295 sblock.fs_maxcontig); 296 fprintf(stdout, 297 "\trotational delay between contiguous blocks %dms\n", 298 sblock.fs_rotdelay); 299 fprintf(stdout, 300 "\tmaximum blocks per file in a cylinder group %d\n", 301 sblock.fs_maxbpg); 302 fprintf(stdout, "\tminimum percentage of free space %d%%\n", 303 sblock.fs_minfree); 304 #ifdef TUNEFS_SOFTDEP 305 fprintf(stdout, "\tsoft dependencies: %s\n", 306 (sblock.fs_flags & FS_DOSOFTDEP) ? "on" : "off"); 307 #endif 308 fprintf(stdout, "\toptimization preference: %s\n", 309 chg[sblock.fs_optim]); 310 fprintf(stdout, "\taverage file size: %d\n", 311 sblock.fs_avgfilesize); 312 fprintf(stdout, 313 "\texpected number of files per directory: %d\n", 314 sblock.fs_avgfpdir); 315 fprintf(stdout, "\ttrack skew %d sectors\n", 316 sblock.fs_trackskew); 317 fprintf(stdout, "tunefs: no changes made\n"); 318 exit(0); 319 } 320 321 memcpy(buf, (char *)&sblock, SBSIZE); 322 if (needswap) 323 ffs_sb_swap((struct fs*)buf, (struct fs*)buf); 324 bwrite((daddr_t)SBOFF / dev_bsize, buf, SBSIZE, special); 325 if (Aflag) 326 for (i = 0; i < sblock.fs_ncg; i++) 327 bwrite(fsbtodb(&sblock, cgsblock(&sblock, i)), 328 buf, SBSIZE, special); 329 close(fi); 330 exit(0); 331 } 332 333 static int 334 getnum(const char *num, const char *desc, int min, int max) 335 { 336 long n; 337 char *ep; 338 339 n = strtol(num, &ep, 10); 340 if (ep[0] != '\0') 341 errx(1, "Invalid number `%s' for %s", num, desc); 342 if ((int) n < min) 343 errx(1, "%s `%s' too small (minimum is %d)", desc, num, min); 344 if ((int) n > max) 345 errx(1, "%s `%s' too large (maximum is %d)", desc, num, max); 346 return ((int)n); 347 } 348 349 static void 350 usage(void) 351 { 352 353 fprintf(stderr, "Usage: tunefs [-AFN] tuneup-options special-device\n"); 354 fprintf(stderr, "where tuneup-options are:\n"); 355 fprintf(stderr, "\t-a maximum contiguous blocks\n"); 356 fprintf(stderr, "\t-d rotational delay between contiguous blocks\n"); 357 fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n"); 358 fprintf(stderr, "\t-g average file size\n"); 359 fprintf(stderr, "\t-h expected number of files per directory\n"); 360 fprintf(stderr, "\t-k track skew in sectors\n"); 361 fprintf(stderr, "\t-m minimum percentage of free space\n"); 362 #ifdef TUNEFS_SOFTDEP 363 fprintf(stderr, "\t-n soft dependencies (`enable' or `disable')\n"); 364 #endif 365 fprintf(stderr, "\t-o optimization preference (`space' or `time')\n"); 366 exit(2); 367 } 368 369 static void 370 getsb(struct fs *fs, const char *file) 371 { 372 373 bread((daddr_t)SBOFF, (char *)fs, SBSIZE, file); 374 if (fs->fs_magic != FS_MAGIC) { 375 if (fs->fs_magic == bswap32(FS_MAGIC)) { 376 warnx("%s: swapping byte order", file); 377 needswap = 1; 378 ffs_sb_swap(fs, fs); 379 } else 380 err(5, "%s: bad magic number", file); 381 } 382 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 383 } 384 385 static void 386 bwrite(daddr_t blk, char *buffer, int size, const char *file) 387 { 388 off_t offset; 389 390 offset = (off_t)blk * dev_bsize; 391 if (lseek(fi, offset, SEEK_SET) == -1) 392 err(6, "%s: seeking to %lld", file, (long long)offset); 393 if (write(fi, buffer, size) != size) 394 err(7, "%s: writing %d bytes", file, size); 395 } 396 397 static void 398 bread(daddr_t blk, char *buffer, int cnt, const char *file) 399 { 400 off_t offset; 401 int i; 402 403 offset = (off_t)blk * dev_bsize; 404 if (lseek(fi, offset, SEEK_SET) == -1) 405 err(4, "%s: seeking to %lld", file, (long long)offset); 406 if ((i = read(fi, buffer, cnt)) != cnt) 407 errx(5, "%s: short read", file); 408 } 409
Indexes created Tue Sep 30 20:09:53 GMT 2025