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/disklabel.h> 54 #include <sys/stat.h> 55 56 #include <ufs/ufs/ufsmount.h> 57 #include <ufs/ufs/dinode.h> 58 #include <ufs/ffs/fs.h> 59 60 #include <err.h> 61 #include <fcntl.h> 62 #include <fstab.h> 63 #include <paths.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 69 /* the optimization warning string template */ 70 #define OPTWARN "should optimize for %s with minfree %s %d%%" 71 72 union { 73 struct fs sb; 74 char pad[MAXBSIZE]; 75 } sbun; 76 #define sblock sbun.sb 77 78 int fi; 79 long dev_bsize = 1; 80 81 void bwrite(ufs2_daddr_t, const char *, int); 82 int bread(ufs2_daddr_t, char *, int); 83 void getsb(struct fs *, const char *); 84 void putsb(struct fs *, const char *, int); 85 void usage(void); 86 void printfs(void); 87 88 int 89 main(argc, argv) 90 int argc; 91 char *argv[]; 92 { 93 char *special; 94 const char *name; 95 struct stat st; 96 int Aflag = 0, active = 0; 97 int aflag = 0, eflag = 0, fflag = 0, mflag = 0; 98 int nflag = 0, oflag = 0, pflag = 0, sflag = 0; 99 int avalue = 0, evalue = 0, fvalue = 0; 100 int mvalue = 0, ovalue = 0, svalue = 0; 101 char *nvalue = NULL; 102 struct fstab *fs; 103 const char *chg[2]; 104 char device[MAXPATHLEN]; 105 struct ufs_args args; 106 struct statfs stfs; 107 int found_arg, ch; 108 109 if (argc < 3) 110 usage(); 111 found_arg = 0; /* at least one arg is required */ 112 while ((ch = getopt(argc, argv, "Aa:e:f:m:n:o:ps:")) != -1) 113 switch (ch) { 114 case 'A': 115 found_arg = 1; 116 Aflag++; 117 break; 118 case 'a': 119 found_arg = 1; 120 name = "maximum contiguous block count"; 121 avalue = atoi(optarg); 122 if (avalue < 1) 123 errx(10, "%s must be >= 1 (was %s)", name, optarg); 124 aflag = 1; 125 break; 126 case 'e': 127 found_arg = 1; 128 name = "maximum blocks per file in a cylinder group"; 129 evalue = atoi(optarg); 130 if (evalue < 1) 131 errx(10, "%s must be >= 1 (was %s)", name, optarg); 132 eflag = 1; 133 break; 134 case 'f': 135 found_arg = 1; 136 name = "average file size"; 137 fvalue = atoi(optarg); 138 if (fvalue < 1) 139 errx(10, "%s must be >= 1 (was %s)", name, optarg); 140 fflag = 1; 141 break; 142 case 'm': 143 found_arg = 1; 144 name = "minimum percentage of free space"; 145 mvalue = atoi(optarg); 146 if (mvalue < 0 || mvalue > 99) 147 errx(10, "bad %s (%s)", name, optarg); 148 mflag = 1; 149 break; 150 case 'n': 151 found_arg = 1; 152 name = "soft updates"; 153 nvalue = optarg; 154 if (strcmp(nvalue, "enable") && strcmp(nvalue, "disable")) { 155 errx(10, "bad %s (options are %s)", 156 name, "`enable' or `disable'"); 157 } 158 nflag = 1; 159 break; 160 case 'o': 161 found_arg = 1; 162 name = "optimization preference"; 163 chg[FS_OPTSPACE] = "space"; 164 chg[FS_OPTTIME] = "time"; 165 if (strcmp(optarg, chg[FS_OPTSPACE]) == 0) 166 ovalue = FS_OPTSPACE; 167 else if (strcmp(optarg, chg[FS_OPTTIME]) == 0) 168 ovalue = FS_OPTTIME; 169 else 170 errx(10, "bad %s (options are `space' or `time')", 171 name); 172 oflag = 1; 173 break; 174 case 'p': 175 found_arg = 1; 176 pflag = 1; 177 break; 178 case 's': 179 found_arg = 1; 180 name = "expected number of files per directory"; 181 svalue = atoi(optarg); 182 if (svalue < 1) 183 errx(10, "%s must be >= 1 (was %s)", name, optarg); 184 sflag = 1; 185 break; 186 default: 187 usage(); 188 } 189 argc -= optind; 190 argv += optind; 191 192 if (found_arg == 0 || argc != 1) 193 usage(); 194 195 special = argv[0]; 196 fs = getfsfile(special); 197 if (fs) { 198 if (statfs(special, &stfs) == 0 && 199 strcmp(special, stfs.f_mntonname) == 0) { 200 active = 1; 201 } 202 special = fs->fs_spec; 203 } 204 again: 205 if (stat(special, &st) < 0) { 206 if (*special != '/') { 207 if (*special == 'r') 208 special++; 209 (void)snprintf(device, sizeof(device), "%s%s", 210 _PATH_DEV, special); 211 special = device; 212 goto again; 213 } 214 err(1, "%s", special); 215 } 216 if (fs == NULL && (st.st_mode & S_IFMT) == S_IFDIR) 217 errx(10, "%s: unknown file system", special); 218 getsb(&sblock, special); 219 220 if (pflag) { 221 printfs(); 222 exit(0); 223 } 224 if (aflag) { 225 name = "maximum contiguous block count"; 226 if (sblock.fs_maxcontig == avalue) { 227 warnx("%s remains unchanged as %d", name, avalue); 228 } 229 else { 230 warnx("%s changes from %d to %d", 231 name, sblock.fs_maxcontig, avalue); 232 sblock.fs_maxcontig = avalue; 233 } 234 } 235 if (eflag) { 236 name = "maximum blocks per file in a cylinder group"; 237 if (sblock.fs_maxbpg == evalue) { 238 warnx("%s remains unchanged as %d", name, evalue); 239 } 240 else { 241 warnx("%s changes from %d to %d", 242 name, sblock.fs_maxbpg, evalue); 243 sblock.fs_maxbpg = evalue; 244 } 245 } 246 if (fflag) { 247 name = "average file size"; 248 if (sblock.fs_avgfilesize == fvalue) { 249 warnx("%s remains unchanged as %d", name, fvalue); 250 } 251 else { 252 warnx("%s changes from %d to %d", 253 name, sblock.fs_avgfilesize, fvalue); 254 sblock.fs_avgfilesize = fvalue; 255 } 256 } 257 if (mflag) { 258 name = "minimum percentage of free space"; 259 if (sblock.fs_minfree == mvalue) { 260 warnx("%s remains unchanged as %d%%", name, mvalue); 261 } 262 else { 263 warnx("%s changes from %d%% to %d%%", 264 name, sblock.fs_minfree, mvalue); 265 sblock.fs_minfree = mvalue; 266 if (mvalue >= MINFREE && sblock.fs_optim == FS_OPTSPACE) 267 warnx(OPTWARN, "time", ">=", MINFREE); 268 if (mvalue < MINFREE && sblock.fs_optim == FS_OPTTIME) 269 warnx(OPTWARN, "space", "<", MINFREE); 270 } 271 } 272 if (nflag) { 273 name = "soft updates"; 274 if (strcmp(nvalue, "enable") == 0) { 275 if (sblock.fs_flags & FS_DOSOFTDEP) { 276 warnx("%s remains unchanged as enabled", name); 277 } else if (sblock.fs_clean == 0) { 278 warnx("%s cannot be enabled until fsck is run", 279 name); 280 } else { 281 sblock.fs_flags |= FS_DOSOFTDEP; 282 warnx("%s set", name); 283 } 284 } else if (strcmp(nvalue, "disable") == 0) { 285 if ((~sblock.fs_flags & FS_DOSOFTDEP) == FS_DOSOFTDEP) { 286 warnx("%s remains unchanged as disabled", name); 287 } else { 288 sblock.fs_flags &= ~FS_DOSOFTDEP; 289 warnx("%s cleared", name); 290 } 291 } 292 } 293 if (oflag) { 294 name = "optimization preference"; 295 chg[FS_OPTSPACE] = "space"; 296 chg[FS_OPTTIME] = "time"; 297 if (sblock.fs_optim == ovalue) { 298 warnx("%s remains unchanged as %s", name, chg[ovalue]); 299 } 300 else { 301 warnx("%s changes from %s to %s", 302 name, chg[sblock.fs_optim], chg[ovalue]); 303 sblock.fs_optim = ovalue; 304 if (sblock.fs_minfree >= MINFREE && 305 ovalue == FS_OPTSPACE) 306 warnx(OPTWARN, "time", ">=", MINFREE); 307 if (sblock.fs_minfree < MINFREE && 308 ovalue == FS_OPTTIME) 309 warnx(OPTWARN, "space", "<", MINFREE); 310 } 311 } 312 if (sflag) { 313 name = "expected number of files per directory"; 314 if (sblock.fs_avgfpdir == svalue) { 315 warnx("%s remains unchanged as %d", name, svalue); 316 } 317 else { 318 warnx("%s changes from %d to %d", 319 name, sblock.fs_avgfpdir, svalue); 320 sblock.fs_avgfpdir = svalue; 321 } 322 } 323 324 putsb(&sblock, special, Aflag); 325 if (active) { 326 bzero(&args, sizeof(args)); 327 if (mount("ufs", fs->fs_file, 328 stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0) 329 err(9, "%s: reload", special); 330 warnx("file system reloaded"); 331 } 332 exit(0); 333 } 334 335 void 336 usage() 337 { 338 fprintf(stderr, "%s\n%s\n%s\n", 339 "usage: tunefs [-A] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-f avgfilesize]", 340 " [-m minfree] [-p] [-n enable | disable] [-o space | time]", 341 " [-s filesperdir] special | file system"); 342 exit(2); 343 } 344 345 /* 346 * Possible superblock locations ordered from most to least likely. 347 */ 348 static int sblock_try[] = SBLOCKSEARCH; 349 static ufs2_daddr_t sblockloc; 350 351 void 352 getsb(fs, file) 353 struct fs *fs; 354 const char *file; 355 { 356 int i; 357 358 fi = open(file, O_RDONLY); 359 if (fi < 0) 360 err(3, "cannot open %s", file); 361 for (i = 0; sblock_try[i] != -1; i++) { 362 if (bread(sblock_try[i], (char *)fs, SBLOCKSIZE)) 363 err(4, "%s: bad super block", file); 364 if ((fs->fs_magic == FS_UFS1_MAGIC || 365 (fs->fs_magic == FS_UFS2_MAGIC && 366 fs->fs_sblockloc == numfrags(fs, sblock_try[i]))) && 367 fs->fs_bsize <= MAXBSIZE && 368 fs->fs_bsize >= sizeof(struct fs)) 369 break; 370 } 371 if (sblock_try[i] == -1) 372 err(5, "Cannot find file system superblock"); 373 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 374 sblockloc = sblock_try[i] / dev_bsize; 375 } 376 377 void 378 putsb(fs, file, all) 379 struct fs *fs; 380 const char *file; 381 int all; 382 { 383 int i; 384 385 /* 386 * Re-open the device read-write. Use the read-only file 387 * descriptor as an interlock to prevent the device from 388 * being mounted while we are switching mode. 389 */ 390 i = fi; 391 fi = open(file, O_RDWR); 392 close(i); 393 if (fi < 0) 394 err(3, "cannot open %s", file); 395 bwrite(sblockloc, (const char *)fs, SBLOCKSIZE); 396 if (all) 397 for (i = 0; i < fs->fs_ncg; i++) 398 bwrite(fsbtodb(fs, cgsblock(fs, i)), 399 (const char *)fs, SBLOCKSIZE); 400 close(fi); 401 } 402 403 void 404 printfs() 405 { 406 warnx("soft updates: (-n) %s", 407 (sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled"); 408 warnx("maximum contiguous block count: (-a) %d", 409 sblock.fs_maxcontig); 410 warnx("maximum blocks per file in a cylinder group: (-e) %d", 411 sblock.fs_maxbpg); 412 warnx("average file size: (-f) %d", 413 sblock.fs_avgfilesize); 414 warnx("average number of files in a directory: (-s) %d", 415 sblock.fs_avgfpdir); 416 warnx("minimum percentage of free space: (-m) %d%%", 417 sblock.fs_minfree); 418 warnx("optimization preference: (-o) %s", 419 sblock.fs_optim == FS_OPTSPACE ? "space" : "time"); 420 if (sblock.fs_minfree >= MINFREE && 421 sblock.fs_optim == FS_OPTSPACE) 422 warnx(OPTWARN, "time", ">=", MINFREE); 423 if (sblock.fs_minfree < MINFREE && 424 sblock.fs_optim == FS_OPTTIME) 425 warnx(OPTWARN, "space", "<", MINFREE); 426 } 427 428 void 429 bwrite(blk, buf, size) 430 ufs2_daddr_t blk; 431 const char *buf; 432 int size; 433 { 434 435 if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0) 436 err(6, "FS SEEK"); 437 if (write(fi, buf, size) != size) 438 err(7, "FS WRITE"); 439 } 440 441 int 442 bread(bno, buf, cnt) 443 ufs2_daddr_t bno; 444 char *buf; 445 int cnt; 446 { 447 int i; 448 449 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0) 450 return(1); 451 if ((i = read(fi, buf, cnt)) != cnt) { 452 for(i=0; i<sblock.fs_bsize; i++) 453 buf[i] = 0; 454 return (1); 455 } 456 return (0); 457 } 458