1 /* 2 * Copyright (c) 1980, 1986, 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 * @(#) Copyright (c) 1980, 1986, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)main.c 8.6 (Berkeley) 5/14/95 35 * $FreeBSD: src/sbin/fsck/main.c,v 1.21.2.1 2001/01/23 23:11:07 iedowse Exp $ 36 * $DragonFly: src/sbin/fsck/main.c,v 1.3 2003/08/08 04:18:37 dillon Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/stat.h> 41 #include <sys/time.h> 42 #include <sys/mount.h> 43 #include <sys/resource.h> 44 45 #include <vfs/ufs/dinode.h> 46 #include <vfs/ufs/ufsmount.h> 47 #include <vfs/ufs/fs.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fstab.h> 52 #include <paths.h> 53 54 #include "fsck.h" 55 56 static int argtoi __P((int flag, char *req, char *str, int base)); 57 static int docheck __P((struct fstab *fsp)); 58 static int checkfilesys __P((char *filesys, char *mntpt, long auxdata, 59 int child)); 60 static struct statfs *getmntpt __P((const char *)); 61 int main __P((int argc, char *argv[])); 62 63 int 64 main(argc, argv) 65 int argc; 66 char *argv[]; 67 { 68 int ch; 69 int ret, maxrun = 0; 70 struct rlimit rlimit; 71 72 sync(); 73 while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) { 74 switch (ch) { 75 case 'p': 76 preen++; 77 break; 78 79 case 'b': 80 bflag = argtoi('b', "number", optarg, 10); 81 printf("Alternate super block location: %d\n", bflag); 82 break; 83 84 case 'c': 85 cvtlevel = argtoi('c', "conversion level", optarg, 10); 86 break; 87 88 case 'd': 89 debug++; 90 break; 91 92 case 'f': 93 fflag++; 94 break; 95 96 case 'l': 97 maxrun = argtoi('l', "number", optarg, 10); 98 break; 99 100 case 'm': 101 lfmode = argtoi('m', "mode", optarg, 8); 102 if (lfmode &~ 07777) 103 errx(EEXIT, "bad mode to -m: %o", lfmode); 104 printf("** lost+found creation mode %o\n", lfmode); 105 break; 106 107 case 'n': 108 case 'N': 109 nflag++; 110 yflag = 0; 111 break; 112 113 case 'y': 114 case 'Y': 115 yflag++; 116 nflag = 0; 117 break; 118 119 default: 120 errx(EEXIT, "%c option?", ch); 121 } 122 } 123 argc -= optind; 124 argv += optind; 125 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 126 (void)signal(SIGINT, catch); 127 if (preen) 128 (void)signal(SIGQUIT, catchquit); 129 signal(SIGINFO, infohandler); 130 /* 131 * Push up our allowed memory limit so we can cope 132 * with huge filesystems. 133 */ 134 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 135 rlimit.rlim_cur = rlimit.rlim_max; 136 (void)setrlimit(RLIMIT_DATA, &rlimit); 137 } 138 if (argc) { 139 while (argc-- > 0) { 140 char *path = blockcheck(*argv); 141 142 if (path == NULL) 143 pfatal("Can't check %s\n", *argv); 144 else 145 (void)checkfilesys(path, 0, 0L, 0); 146 ++argv; 147 } 148 exit(0); 149 } 150 ret = checkfstab(preen, maxrun, docheck, checkfilesys); 151 if (returntosingle) 152 exit(2); 153 exit(ret); 154 } 155 156 static int 157 argtoi(flag, req, str, base) 158 int flag; 159 char *req, *str; 160 int base; 161 { 162 char *cp; 163 int ret; 164 165 ret = (int)strtol(str, &cp, base); 166 if (cp == str || *cp) 167 errx(EEXIT, "-%c flag requires a %s", flag, req); 168 return (ret); 169 } 170 171 /* 172 * Determine whether a filesystem should be checked. 173 */ 174 static int 175 docheck(fsp) 176 register struct fstab *fsp; 177 { 178 179 if (strcmp(fsp->fs_vfstype, "ufs") || 180 (strcmp(fsp->fs_type, FSTAB_RW) && 181 strcmp(fsp->fs_type, FSTAB_RO)) || 182 fsp->fs_passno == 0) 183 return (0); 184 return (1); 185 } 186 187 /* 188 * Check the specified filesystem. 189 */ 190 /* ARGSUSED */ 191 static int 192 checkfilesys(filesys, mntpt, auxdata, child) 193 char *filesys, *mntpt; 194 long auxdata; 195 int child; 196 { 197 ufs_daddr_t n_ffree, n_bfree; 198 struct dups *dp; 199 struct statfs *mntbuf; 200 struct zlncnt *zlnp; 201 int cylno; 202 203 if (preen && child) 204 (void)signal(SIGQUIT, voidquit); 205 cdevname = filesys; 206 if (debug && preen) 207 pwarn("starting\n"); 208 switch (setup(filesys)) { 209 case 0: 210 if (preen) 211 pfatal("CAN'T CHECK FILE SYSTEM."); 212 return (0); 213 case -1: 214 pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree + 215 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree); 216 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 217 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree, 218 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 219 return (0); 220 } 221 got_siginfo = 0; 222 223 /* 224 * Get the mount point information of the filesystem, if 225 * it is available. 226 */ 227 mntbuf = getmntpt(filesys); 228 229 /* 230 * Cleared if any questions answered no. Used to decide if 231 * the superblock should be marked clean. 232 */ 233 resolved = 1; 234 /* 235 * 1: scan inodes tallying blocks used 236 */ 237 if (preen == 0) { 238 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 239 if (mntbuf != NULL && mntbuf->f_flags & MNT_ROOTFS) 240 printf("** Root file system\n"); 241 printf("** Phase 1 - Check Blocks and Sizes\n"); 242 } 243 pass1(); 244 245 /* 246 * 1b: locate first references to duplicates, if any 247 */ 248 if (duplist) { 249 if (preen || usedsoftdep) 250 pfatal("INTERNAL ERROR: dups with -p"); 251 printf("** Phase 1b - Rescan For More DUPS\n"); 252 pass1b(); 253 } 254 255 /* 256 * 2: traverse directories from root to mark all connected directories 257 */ 258 if (preen == 0) 259 printf("** Phase 2 - Check Pathnames\n"); 260 pass2(); 261 262 /* 263 * 3: scan inodes looking for disconnected directories 264 */ 265 if (preen == 0) 266 printf("** Phase 3 - Check Connectivity\n"); 267 pass3(); 268 269 /* 270 * 4: scan inodes looking for disconnected files; check reference counts 271 */ 272 if (preen == 0) 273 printf("** Phase 4 - Check Reference Counts\n"); 274 pass4(); 275 276 /* 277 * 5: check and repair resource counts in cylinder groups 278 */ 279 if (preen == 0) 280 printf("** Phase 5 - Check Cyl groups\n"); 281 pass5(); 282 283 /* 284 * print out summary statistics 285 */ 286 n_ffree = sblock.fs_cstotal.cs_nffree; 287 n_bfree = sblock.fs_cstotal.cs_nbfree; 288 pwarn("%ld files, %ld used, %ld free ", 289 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); 290 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 291 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize); 292 if (debug && 293 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree)) 294 printf("%d files missing\n", n_files); 295 if (debug) { 296 n_blks += sblock.fs_ncg * 297 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 298 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 299 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 300 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree)) 301 printf("%d blocks missing\n", n_blks); 302 if (duplist != NULL) { 303 printf("The following duplicate blocks remain:"); 304 for (dp = duplist; dp; dp = dp->next) 305 printf(" %d,", dp->dup); 306 printf("\n"); 307 } 308 if (zlnhead != NULL) { 309 printf("The following zero link count inodes remain:"); 310 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 311 printf(" %u,", zlnp->zlncnt); 312 printf("\n"); 313 } 314 } 315 zlnhead = (struct zlncnt *)0; 316 duplist = (struct dups *)0; 317 muldup = (struct dups *)0; 318 inocleanup(); 319 if (fsmodified) { 320 sblock.fs_time = time(NULL); 321 sbdirty(); 322 } 323 if (cvtlevel && sblk.b_dirty) { 324 /* 325 * Write out the duplicate super blocks 326 */ 327 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 328 bwrite(fswritefd, (char *)&sblock, 329 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 330 } 331 if (rerun) 332 resolved = 0; 333 334 /* 335 * Check to see if the filesystem is mounted read-write. 336 */ 337 if (mntbuf != NULL && (mntbuf->f_flags & MNT_RDONLY) == 0) 338 resolved = 0; 339 ckfini(resolved); 340 341 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 342 if (inostathead[cylno].il_stat != NULL) 343 free((char *)inostathead[cylno].il_stat); 344 free((char *)inostathead); 345 inostathead = NULL; 346 if (fsmodified && !preen) 347 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 348 if (rerun) 349 printf("\n***** PLEASE RERUN FSCK *****\n"); 350 if (mntbuf != NULL) { 351 struct ufs_args args; 352 int ret; 353 /* 354 * We modified a mounted filesystem. Do a mount update on 355 * it unless it is read-write, so we can continue using it 356 * as safely as possible. 357 */ 358 if (mntbuf->f_flags & MNT_RDONLY) { 359 args.fspec = 0; 360 args.export.ex_flags = 0; 361 args.export.ex_root = 0; 362 ret = mount("ufs", mntbuf->f_mntonname, 363 mntbuf->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 364 if (ret == 0) 365 return (0); 366 pwarn("mount reload of '%s' failed: %s\n\n", 367 mntbuf->f_mntonname, strerror(errno)); 368 } 369 if (!fsmodified) 370 return (0); 371 if (!preen) 372 printf("\n***** REBOOT NOW *****\n"); 373 sync(); 374 return (4); 375 } 376 return (0); 377 } 378 379 /* 380 * Get the directory that the device is mounted on. 381 */ 382 static struct statfs * 383 getmntpt(name) 384 const char *name; 385 { 386 struct stat devstat, mntdevstat; 387 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 388 char *devname; 389 struct statfs *mntbuf; 390 int i, mntsize; 391 392 if (stat(name, &devstat) != 0 || 393 !(S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))) 394 return (NULL); 395 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 396 for (i = 0; i < mntsize; i++) { 397 if (strcmp(mntbuf[i].f_fstypename, "ufs") != 0) 398 continue; 399 devname = mntbuf[i].f_mntfromname; 400 if (*devname != '/') { 401 strcpy(device, _PATH_DEV); 402 strcat(device, devname); 403 devname = device; 404 } 405 if (stat(devname, &mntdevstat) == 0 && 406 mntdevstat.st_rdev == devstat.st_rdev) 407 return (&mntbuf[i]); 408 } 409 return (NULL); 410 } 411