1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1983, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)tunefs.c 8.2 (Berkeley) 4/19/94"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 /* 49 * tunefs: change layout parameters to an existing file system. 50 */ 51 #include <sys/param.h> 52 #include <sys/mount.h> 53 #include <sys/stat.h> 54 55 #include <ufs/ffs/fs.h> 56 #include <ufs/ufs/ufsmount.h> 57 58 #include <err.h> 59 #include <fcntl.h> 60 #include <fstab.h> 61 #include <paths.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 /* the optimization warning string template */ 68 #define OPTWARN "should optimize for %s with minfree %s %d%%" 69 70 union { 71 struct fs sb; 72 char pad[MAXBSIZE]; 73 } sbun; 74 #define sblock sbun.sb 75 76 int fi; 77 long dev_bsize = 1; 78 79 void bwrite __P((daddr_t, char *, int)); 80 int bread __P((daddr_t, char *, int)); 81 void getsb __P((struct fs *, char *)); 82 void putsb __P((struct fs *, char *, int)); 83 void usage __P((void)); 84 void printfs __P((void)); 85 86 int 87 main(argc, argv) 88 int argc; 89 char *argv[]; 90 { 91 char *special, *name; 92 struct stat st; 93 int Aflag = 0, active = 0; 94 int aflag = 0, dflag = 0, eflag = 0, mflag = 0; 95 int nflag = 0, oflag = 0, pflag = 0; 96 int avalue = 0, dvalue = 0, evalue = 0, mvalue = 0, ovalue = 0; 97 char *nvalue = NULL; 98 struct fstab *fs; 99 char *chg[2], device[MAXPATHLEN]; 100 struct ufs_args args; 101 struct statfs stfs; 102 int found_arg, ch; 103 104 if (argc < 3) 105 usage(); 106 found_arg = 0; /* at least one arg is required */ 107 while ((ch = getopt(argc, argv, "Aa:d:e:m:n:o:p")) != -1) 108 switch (ch) { 109 case 'A': 110 found_arg = 1; 111 Aflag++; 112 break; 113 case 'a': 114 found_arg = 1; 115 name = "maximum contiguous block count"; 116 avalue = atoi(optarg); 117 if (avalue < 1) 118 errx(10, "%s must be >= 1 (was %s)", name, optarg); 119 aflag = 1; 120 break; 121 case 'd': 122 found_arg = 1; 123 name = "rotational delay between contiguous blocks"; 124 dvalue = atoi(optarg); 125 dflag = 1; 126 break; 127 case 'e': 128 found_arg = 1; 129 name = "maximum blocks per file in a cylinder group"; 130 evalue = atoi(optarg); 131 if (evalue < 1) 132 errx(10, "%s must be >= 1 (was %s)", name, optarg); 133 eflag = 1; 134 break; 135 case 'm': 136 found_arg = 1; 137 name = "minimum percentage of free space"; 138 mvalue = atoi(optarg); 139 if (mvalue < 0 || mvalue > 99) 140 errx(10, "bad %s (%s)", name, optarg); 141 mflag = 1; 142 break; 143 case 'n': 144 found_arg = 1; 145 name = "soft updates"; 146 nvalue = optarg; 147 if (strcmp(nvalue, "enable") && strcmp(nvalue, "disable")) { 148 errx(10, "bad %s (options are %s)", 149 name, "`enable' or `disable'"); 150 } 151 nflag = 1; 152 break; 153 case 'o': 154 found_arg = 1; 155 name = "optimization preference"; 156 chg[FS_OPTSPACE] = "space"; 157 chg[FS_OPTTIME] = "time"; 158 if (strcmp(optarg, chg[FS_OPTSPACE]) == 0) 159 ovalue = FS_OPTSPACE; 160 else if (strcmp(optarg, chg[FS_OPTTIME]) == 0) 161 ovalue = FS_OPTTIME; 162 else 163 errx(10, "bad %s (options are `space' or `time')", 164 name); 165 oflag = 1; 166 break; 167 case 'p': 168 found_arg = 1; 169 pflag = 1; 170 break; 171 default: 172 usage(); 173 } 174 argc -= optind; 175 argv += optind; 176 177 if (found_arg == 0 || argc != 1) 178 usage(); 179 180 special = argv[0]; 181 fs = getfsfile(special); 182 if (fs) { 183 if (statfs(special, &stfs) == 0 && 184 strcmp(special, stfs.f_mntonname) == 0) { 185 active = 1; 186 } 187 special = fs->fs_spec; 188 } 189 again: 190 if (stat(special, &st) < 0) { 191 if (*special != '/') { 192 if (*special == 'r') 193 special++; 194 (void)sprintf(device, "%s/%s", _PATH_DEV, special); 195 special = device; 196 goto again; 197 } 198 err(1, "%s", special); 199 } 200 if ((st.st_mode & S_IFMT) != S_IFBLK && 201 (st.st_mode & S_IFMT) != S_IFCHR) 202 errx(10, "%s: not a block or character device", special); 203 getsb(&sblock, special); 204 205 if (pflag) { 206 printfs(); 207 exit(0); 208 } 209 if (aflag) { 210 name = "maximum contiguous block count"; 211 if (sblock.fs_maxcontig == avalue) { 212 warnx("%s remains unchanged as %d", name, avalue); 213 } 214 else { 215 warnx("%s changes from %d to %d", 216 name, sblock.fs_maxcontig, avalue); 217 sblock.fs_maxcontig = avalue; 218 } 219 } 220 if (dflag) { 221 name = "rotational delay between contiguous blocks"; 222 if (sblock.fs_rotdelay == dvalue) { 223 warnx("%s remains unchanged as %dms", name, dvalue); 224 } 225 else { 226 warnx("%s changes from %dms to %dms", 227 name, sblock.fs_rotdelay, dvalue); 228 sblock.fs_rotdelay = dvalue; 229 } 230 } 231 if (eflag) { 232 name = "maximum blocks per file in a cylinder group"; 233 if (sblock.fs_maxbpg == evalue) { 234 warnx("%s remains unchanged as %d", name, evalue); 235 } 236 else { 237 warnx("%s changes from %d to %d", 238 name, sblock.fs_maxbpg, evalue); 239 sblock.fs_maxbpg = evalue; 240 } 241 } 242 if (mflag) { 243 name = "minimum percentage of free space"; 244 if (sblock.fs_minfree == mvalue) { 245 warnx("%s remains unchanged as %d%%", name, mvalue); 246 } 247 else { 248 warnx("%s changes from %d%% to %d%%", 249 name, sblock.fs_minfree, mvalue); 250 sblock.fs_minfree = mvalue; 251 if (mvalue >= MINFREE && sblock.fs_optim == FS_OPTSPACE) 252 warnx(OPTWARN, "time", ">=", MINFREE); 253 if (mvalue < MINFREE && sblock.fs_optim == FS_OPTTIME) 254 warnx(OPTWARN, "space", "<", MINFREE); 255 } 256 } 257 if (nflag) { 258 name = "soft updates"; 259 if (strcmp(nvalue, "enable") == 0) { 260 if ( sblock.fs_flags & FS_DOSOFTDEP ) { 261 warnx("%s remains unchanged as enabled", name); 262 } else { 263 sblock.fs_flags |= FS_DOSOFTDEP; 264 warnx("%s set", name); 265 } 266 } else if (strcmp(nvalue, "disable") == 0) { 267 if ((~sblock.fs_flags & FS_DOSOFTDEP) == FS_DOSOFTDEP) { 268 warnx("%s remains unchanged as disabled", name); 269 } else { 270 sblock.fs_flags &= ~FS_DOSOFTDEP; 271 warnx("%s cleared", name); 272 } 273 } 274 } 275 if (oflag) { 276 name = "optimization preference"; 277 chg[FS_OPTSPACE] = "space"; 278 chg[FS_OPTTIME] = "time"; 279 if (sblock.fs_optim == ovalue) { 280 warnx("%s remains unchanged as %s", name, chg[ovalue]); 281 } 282 else { 283 warnx("%s changes from %s to %s", 284 name, chg[sblock.fs_optim], chg[ovalue]); 285 sblock.fs_optim = ovalue; 286 if (sblock.fs_minfree >= MINFREE && 287 ovalue == FS_OPTSPACE) 288 warnx(OPTWARN, "time", ">=", MINFREE); 289 if (sblock.fs_minfree < MINFREE && 290 ovalue == FS_OPTTIME) 291 warnx(OPTWARN, "space", "<", MINFREE); 292 } 293 } 294 295 putsb(&sblock, special, Aflag); 296 if (active) { 297 bzero(&args, sizeof(args)); 298 if (mount("ufs", fs->fs_file, 299 stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0) 300 err(9, "%s: reload", special); 301 warnx("file system reloaded"); 302 } 303 exit(0); 304 } 305 306 void 307 usage() 308 { 309 fprintf(stderr, "%s\n%s\n%s\n", 310 "usage: tunefs [-A] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-m minfree]", 311 " [-p] [-n enable | disable] [-o space | time]", 312 " special | filesystem"); 313 exit(2); 314 } 315 316 void 317 getsb(fs, file) 318 register struct fs *fs; 319 char *file; 320 { 321 322 fi = open(file, O_RDONLY); 323 if (fi < 0) 324 err(3, "cannot open %s", file); 325 if (bread((daddr_t)SBOFF, (char *)fs, SBSIZE)) 326 err(4, "%s: bad super block", file); 327 if (fs->fs_magic != FS_MAGIC) 328 err(5, "%s: bad magic number", file); 329 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 330 } 331 332 void 333 putsb(fs, file, all) 334 register struct fs *fs; 335 char *file; 336 int all; 337 { 338 int i; 339 340 /* 341 * Re-open the device read-write. Use the read-only file 342 * descriptor as an interlock to prevent the device from 343 * being mounted while we are switching mode. 344 */ 345 i = fi; 346 fi = open(file, O_RDWR); 347 close(i); 348 if (fi < 0) 349 err(3, "cannot open %s", file); 350 bwrite((daddr_t)SBOFF / dev_bsize, (char *)fs, SBSIZE); 351 if (all) 352 for (i = 0; i < fs->fs_ncg; i++) 353 bwrite(fsbtodb(fs, cgsblock(fs, i)), 354 (char *)fs, SBSIZE); 355 close(fi); 356 } 357 358 void 359 printfs() 360 { 361 warnx("soft updates: (-n) %s", 362 (sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled"); 363 warnx("maximum contiguous block count: (-a) %d", 364 sblock.fs_maxcontig); 365 warnx("rotational delay between contiguous blocks: (-d) %d ms", 366 sblock.fs_rotdelay); 367 warnx("maximum blocks per file in a cylinder group: (-e) %d", 368 sblock.fs_maxbpg); 369 warnx("minimum percentage of free space: (-m) %d%%", 370 sblock.fs_minfree); 371 warnx("optimization preference: (-o) %s", 372 sblock.fs_optim == FS_OPTSPACE ? "space" : "time"); 373 if (sblock.fs_minfree >= MINFREE && 374 sblock.fs_optim == FS_OPTSPACE) 375 warnx(OPTWARN, "time", ">=", MINFREE); 376 if (sblock.fs_minfree < MINFREE && 377 sblock.fs_optim == FS_OPTTIME) 378 warnx(OPTWARN, "space", "<", MINFREE); 379 } 380 381 void 382 bwrite(blk, buf, size) 383 daddr_t blk; 384 char *buf; 385 int size; 386 { 387 388 if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0) 389 err(6, "FS SEEK"); 390 if (write(fi, buf, size) != size) 391 err(7, "FS WRITE"); 392 } 393 394 int 395 bread(bno, buf, cnt) 396 daddr_t bno; 397 char *buf; 398 int cnt; 399 { 400 int i; 401 402 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0) 403 return(1); 404 if ((i = read(fi, buf, cnt)) != cnt) { 405 for(i=0; i<sblock.fs_bsize; i++) 406 buf[i] = 0; 407 return (1); 408 } 409 return (0); 410 } 411