tunefs.c revision 1.22
1 /* $NetBSD: tunefs.c,v 1.22 2001/08/19 09:39:24 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 1.22 2001/08/19 09:39:24 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 #include <sys/stat.h> 55 56 #include <ufs/ufs/dinode.h> 57 #include <ufs/ffs/fs.h> 58 #include <ufs/ffs/ffs_extern.h> 59 60 #include <machine/bswap.h> 61 62 #include <err.h> 63 #include <errno.h> 64 #include <fcntl.h> 65 #include <fstab.h> 66 #include <paths.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <unistd.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); 87 static int bread(daddr_t, char *, int); 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 #ifdef TUNEFS_SOFTDEP 97 int softdep; 98 #define OPTSTRING "AFNa:d:e:m:n:o:t:" 99 #else 100 #define OPTSTRING "AFNa:d:e:m:o:t:" 101 #endif 102 struct stat st; 103 int i, ch, Aflag, Fflag, Nflag; 104 struct fstab *fs; 105 const char *special, *chg[2]; 106 char device[MAXPATHLEN]; 107 int maxbpg, maxcontig, minfree, rotdelay, optim, trackskew; 108 109 Aflag = Fflag = Nflag = 0; 110 maxbpg = maxcontig = minfree = rotdelay = optim = trackskew = -1; 111 #ifdef TUNEFS_SOFTDEP 112 softdep = -1; 113 #endif 114 chg[FS_OPTSPACE] = "space"; 115 chg[FS_OPTTIME] = "time"; 116 117 while ((ch = getopt(argc, argv, OPTSTRING)) != -1) { 118 switch (ch) { 119 120 case 'A': 121 Aflag++; 122 break; 123 124 case 'F': 125 Fflag++; 126 break; 127 128 case 'N': 129 Nflag++; 130 break; 131 132 case 'a': 133 maxcontig = getnum(optarg, 134 "maximum contiguous block count", 1, INT_MAX); 135 break; 136 137 case 'd': 138 rotdelay = getnum(optarg, 139 "rotational delay between contiguous blocks", 140 0, INT_MAX); 141 break; 142 143 case 'e': 144 maxbpg = getnum(optarg, 145 "maximum blocks per file in a cylinder group", 146 1, INT_MAX); 147 break; 148 149 150 case 'm': 151 minfree = getnum(optarg, 152 "minimum percentage of free space", 0, 99); 153 break; 154 155 #ifdef TUNEFS_SOFTDEP 156 case 'n': 157 if (strcmp(optarg, "enable") == 0) 158 softdep = 1; 159 else if (strcmp(optarg, "disable") == 0) 160 softdep = 0; 161 else { 162 errx(10, "bad soft dependencies " 163 "(options are `enable' or `disable')"); 164 } 165 break; 166 #endif 167 168 case 'o': 169 if (strcmp(optarg, chg[FS_OPTSPACE]) == 0) 170 optim = FS_OPTSPACE; 171 else if (strcmp(optarg, chg[FS_OPTTIME]) == 0) 172 optim = FS_OPTTIME; 173 else 174 errx(10, 175 "bad %s (options are `space' or `time')", 176 "optimization preference"); 177 break; 178 179 case 't': 180 trackskew = getnum(optarg, 181 "track skew in sectors", 0, INT_MAX); 182 break; 183 184 default: 185 usage(); 186 } 187 } 188 argc -= optind; 189 argv += optind; 190 if (argc != 1) 191 usage(); 192 193 special = argv[0]; 194 fs = getfsfile(special); 195 if (fs) 196 special = fs->fs_spec; 197 again: 198 if (stat(special, &st) < 0) { 199 if (!Fflag && *special != '/') { 200 if (*special == 'r') 201 special++; 202 (void)snprintf(device, sizeof(device), "%s/%s", 203 _PATH_DEV, special); 204 special = device; 205 goto again; 206 } 207 err(1, "%s", special); 208 } 209 if (Fflag) { 210 if (!S_ISREG(st.st_mode)) 211 errx(10, "%s: not a regular file", special); 212 } else if (!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode)) 213 errx(10, "%s: not a block or character device", special); 214 getsb(&sblock, special); 215 216 if (maxcontig != -1) { 217 warnx("%s changes from %d to %d", 218 "maximum contiguous block count", 219 sblock.fs_maxcontig, maxcontig); 220 sblock.fs_maxcontig = maxcontig; 221 } 222 if (rotdelay != -1) { 223 warnx("%s changes from %dms to %dms", 224 "rotational delay between contiguous blocks", 225 sblock.fs_rotdelay, rotdelay); 226 sblock.fs_rotdelay = rotdelay; 227 } 228 if (maxbpg != -1) { 229 warnx("%s changes from %d to %d", 230 "maximum blocks per file in a cylinder group", 231 sblock.fs_maxbpg, maxbpg); 232 sblock.fs_maxbpg = maxbpg; 233 } 234 if (minfree != -1) { 235 warnx("%s changes from %d%% to %d%%", 236 "minimum percentage of free space", 237 sblock.fs_minfree, minfree); 238 sblock.fs_minfree = minfree; 239 if (minfree >= MINFREE && 240 sblock.fs_optim == FS_OPTSPACE) 241 warnx(OPTWARN, "time", ">=", MINFREE); 242 if (minfree < MINFREE && 243 sblock.fs_optim == FS_OPTTIME) 244 warnx(OPTWARN, "space", "<", MINFREE); 245 } 246 #ifdef TUNEFS_SOFTDEP 247 if (softdep == 1) { 248 sblock.fs_flags |= FS_DOSOFTDEP; 249 warnx("soft dependencies set"); 250 } else if (softdep == 0) { 251 sblock.fs_flags &= ~FS_DOSOFTDEP; 252 warnx("soft dependencies cleared"); 253 } 254 #endif 255 if (optim != -1) { 256 if (sblock.fs_optim == optim) { 257 warnx("%s remains unchanged as %s", 258 "optimization preference", 259 chg[optim]); 260 } else { 261 warnx("%s changes from %s to %s", 262 "optimization preference", 263 chg[sblock.fs_optim], chg[optim]); 264 sblock.fs_optim = optim; 265 if (sblock.fs_minfree >= MINFREE && 266 optim == FS_OPTSPACE) 267 warnx(OPTWARN, "time", ">=", MINFREE); 268 if (sblock.fs_minfree < MINFREE && 269 optim == FS_OPTTIME) 270 warnx(OPTWARN, "space", "<", MINFREE); 271 } 272 } 273 if (trackskew != -1) { 274 warnx("%s changes from %d to %d", 275 "track skew in sectors", sblock.fs_trackskew, trackskew); 276 sblock.fs_trackskew = trackskew; 277 } 278 279 if (Nflag) { 280 fprintf(stdout, "tunefs: current settings of %s\n", special); 281 fprintf(stdout, "\tmaximum contiguous block count %d\n", 282 sblock.fs_maxcontig); 283 fprintf(stdout, 284 "\trotational delay between contiguous blocks %dms\n", 285 sblock.fs_rotdelay); 286 fprintf(stdout, 287 "\tmaximum blocks per file in a cylinder group %d\n", 288 sblock.fs_maxbpg); 289 fprintf(stdout, "\tminimum percentage of free space %d%%\n", 290 sblock.fs_minfree); 291 #ifdef TUNEFS_SOFTDEP 292 fprintf(stdout, "\tsoft dependencies: %s\n", 293 (sblock.fs_flags & FS_DOSOFTDEP) ? "on" : "off"); 294 #endif 295 fprintf(stdout, "\toptimization preference: %s\n", 296 chg[sblock.fs_optim]); 297 fprintf(stdout, "\ttrack skew %d sectors\n", 298 sblock.fs_trackskew); 299 fprintf(stdout, "tunefs: no changes made\n"); 300 exit(0); 301 } 302 303 fi = open(special, 1); 304 if (fi < 0) 305 err(3, "cannot open %s for writing", special); 306 memcpy(buf, (char *)&sblock, SBSIZE); 307 if (needswap) 308 ffs_sb_swap((struct fs*)buf, (struct fs*)buf); 309 bwrite((daddr_t)SBOFF / dev_bsize, buf, SBSIZE); 310 if (Aflag) 311 for (i = 0; i < sblock.fs_ncg; i++) 312 bwrite(fsbtodb(&sblock, cgsblock(&sblock, i)), 313 buf, SBSIZE); 314 close(fi); 315 exit(0); 316 } 317 318 static int 319 getnum(const char *num, const char *desc, int min, int max) 320 { 321 long n; 322 char *ep; 323 324 n = strtol(num, &ep, 10); 325 if (ep[0] != '\0') 326 errx(1, "Invalid number `%s' for %s", num, desc); 327 if ((int) n < min) 328 errx(1, "%s `%s' too small (minimum is %d)", desc, num, min); 329 if ((int) n > max) 330 errx(1, "%s `%s' too large (maximum is %d)", desc, num, max); 331 return ((int)n); 332 } 333 334 static void 335 usage(void) 336 { 337 338 fprintf(stderr, "Usage: tunefs [-AFN] tuneup-options special-device\n"); 339 fprintf(stderr, "where tuneup-options are:\n"); 340 fprintf(stderr, "\t-d rotational delay between contiguous blocks\n"); 341 fprintf(stderr, "\t-a maximum contiguous blocks\n"); 342 fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n"); 343 fprintf(stderr, "\t-m minimum percentage of free space\n"); 344 fprintf(stderr, "\t-o optimization preference (`space' or `time')\n"); 345 #ifdef TUNEFS_SOFTDEP 346 fprintf(stderr, "\t-n soft dependencies (`enable' or `disable')\n"); 347 #endif 348 fprintf(stderr, "\t-t track skew in sectors\n"); 349 exit(2); 350 } 351 352 static void 353 getsb(struct fs *fs, const char *file) 354 { 355 356 fi = open(file, 0); 357 if (fi < 0) 358 err(3, "cannot open %s for reading", file); 359 if (bread((daddr_t)SBOFF, (char *)fs, SBSIZE)) 360 err(4, "%s: bad super block", file); 361 if (fs->fs_magic != FS_MAGIC) { 362 if (fs->fs_magic == bswap32(FS_MAGIC)) { 363 warnx("%s: swapping byte order", file); 364 needswap = 1; 365 ffs_sb_swap(fs, fs); 366 } else 367 err(5, "%s: bad magic number", file); 368 } 369 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 370 close(fi); 371 } 372 373 static void 374 bwrite(daddr_t blk, char *buffer, int size) 375 { 376 377 if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0) 378 err(6, "FS SEEK"); 379 if (write(fi, buffer, size) != size) 380 err(7, "FS WRITE"); 381 } 382 383 static int 384 bread(daddr_t bno, char *buffer, int cnt) 385 { 386 int i; 387 388 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0) 389 return(1); 390 if ((i = read(fi, buffer, cnt)) != cnt) { 391 for(i=0; i<sblock.fs_bsize; i++) 392 buf[i] = 0; 393 return (1); 394 } 395 return (0); 396 } 397
Indexes created Tue Sep 30 20:09:53 GMT 2025