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 1.5 2003/11/01 17:15:58 drhodus 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(int flag, char *req, char *str, int base); 57 static int docheck(struct fstab *fsp); 58 static int checkfilesys __P((char *filesys, char *mntpt, long auxdata, 59 int child)); 60 static struct statfs *getmntpt(const char *); 61 int main(int argc, char *argv[]); 62 63 int 64 main(int argc, char **argv) 65 { 66 int ch; 67 int ret, maxrun = 0; 68 struct rlimit rlimit; 69 70 sync(); 71 while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) { 72 switch (ch) { 73 case 'p': 74 preen++; 75 break; 76 77 case 'b': 78 bflag = argtoi('b', "number", optarg, 10); 79 printf("Alternate super block location: %d\n", bflag); 80 break; 81 82 case 'c': 83 cvtlevel = argtoi('c', "conversion level", optarg, 10); 84 break; 85 86 case 'd': 87 debug++; 88 break; 89 90 case 'f': 91 fflag++; 92 break; 93 94 case 'l': 95 maxrun = argtoi('l', "number", optarg, 10); 96 break; 97 98 case 'm': 99 lfmode = argtoi('m', "mode", optarg, 8); 100 if (lfmode &~ 07777) 101 errx(EEXIT, "bad mode to -m: %o", lfmode); 102 printf("** lost+found creation mode %o\n", lfmode); 103 break; 104 105 case 'n': 106 case 'N': 107 nflag++; 108 yflag = 0; 109 break; 110 111 case 'y': 112 case 'Y': 113 yflag++; 114 nflag = 0; 115 break; 116 117 default: 118 errx(EEXIT, "%c option?", ch); 119 } 120 } 121 argc -= optind; 122 argv += optind; 123 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 124 (void)signal(SIGINT, catch); 125 if (preen) 126 (void)signal(SIGQUIT, catchquit); 127 signal(SIGINFO, infohandler); 128 /* 129 * Push up our allowed memory limit so we can cope 130 * with huge filesystems. 131 */ 132 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 133 rlimit.rlim_cur = rlimit.rlim_max; 134 (void)setrlimit(RLIMIT_DATA, &rlimit); 135 } 136 if (argc) { 137 while (argc-- > 0) { 138 char *path = blockcheck(*argv); 139 140 if (path == NULL) 141 pfatal("Can't check %s\n", *argv); 142 else 143 (void)checkfilesys(path, 0, 0L, 0); 144 ++argv; 145 } 146 exit(0); 147 } 148 ret = checkfstab(preen, maxrun, docheck, checkfilesys); 149 if (returntosingle) 150 exit(2); 151 exit(ret); 152 } 153 154 static int 155 argtoi(int flag, char *req, char *str, int base) 156 { 157 char *cp; 158 int ret; 159 160 ret = (int)strtol(str, &cp, base); 161 if (cp == str || *cp) 162 errx(EEXIT, "-%c flag requires a %s", flag, req); 163 return (ret); 164 } 165 166 /* 167 * Determine whether a filesystem should be checked. 168 */ 169 static int 170 docheck(register struct fstab *fsp) 171 { 172 173 if (strcmp(fsp->fs_vfstype, "ufs") || 174 (strcmp(fsp->fs_type, FSTAB_RW) && 175 strcmp(fsp->fs_type, FSTAB_RO)) || 176 fsp->fs_passno == 0) 177 return (0); 178 return (1); 179 } 180 181 /* 182 * Check the specified filesystem. 183 */ 184 /* ARGSUSED */ 185 static int 186 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 187 { 188 ufs_daddr_t n_ffree, n_bfree; 189 struct dups *dp; 190 struct statfs *mntbuf; 191 struct zlncnt *zlnp; 192 int cylno; 193 194 if (preen && child) 195 (void)signal(SIGQUIT, voidquit); 196 cdevname = filesys; 197 if (debug && preen) 198 pwarn("starting\n"); 199 switch (setup(filesys)) { 200 case 0: 201 if (preen) 202 pfatal("CAN'T CHECK FILE SYSTEM."); 203 return (0); 204 case -1: 205 pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree + 206 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree); 207 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 208 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree, 209 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 210 return (0); 211 } 212 got_siginfo = 0; 213 214 /* 215 * Get the mount point information of the filesystem, if 216 * it is available. 217 */ 218 mntbuf = getmntpt(filesys); 219 220 /* 221 * Cleared if any questions answered no. Used to decide if 222 * the superblock should be marked clean. 223 */ 224 resolved = 1; 225 /* 226 * 1: scan inodes tallying blocks used 227 */ 228 if (preen == 0) { 229 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 230 if (mntbuf != NULL && mntbuf->f_flags & MNT_ROOTFS) 231 printf("** Root file system\n"); 232 printf("** Phase 1 - Check Blocks and Sizes\n"); 233 } 234 pass1(); 235 236 /* 237 * 1b: locate first references to duplicates, if any 238 */ 239 if (duplist) { 240 if (preen || usedsoftdep) 241 pfatal("INTERNAL ERROR: dups with -p"); 242 printf("** Phase 1b - Rescan For More DUPS\n"); 243 pass1b(); 244 } 245 246 /* 247 * 2: traverse directories from root to mark all connected directories 248 */ 249 if (preen == 0) 250 printf("** Phase 2 - Check Pathnames\n"); 251 pass2(); 252 253 /* 254 * 3: scan inodes looking for disconnected directories 255 */ 256 if (preen == 0) 257 printf("** Phase 3 - Check Connectivity\n"); 258 pass3(); 259 260 /* 261 * 4: scan inodes looking for disconnected files; check reference counts 262 */ 263 if (preen == 0) 264 printf("** Phase 4 - Check Reference Counts\n"); 265 pass4(); 266 267 /* 268 * 5: check and repair resource counts in cylinder groups 269 */ 270 if (preen == 0) 271 printf("** Phase 5 - Check Cyl groups\n"); 272 pass5(); 273 274 /* 275 * print out summary statistics 276 */ 277 n_ffree = sblock.fs_cstotal.cs_nffree; 278 n_bfree = sblock.fs_cstotal.cs_nbfree; 279 pwarn("%ld files, %ld used, %ld free ", 280 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); 281 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 282 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize); 283 if (debug && 284 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree)) 285 printf("%d files missing\n", n_files); 286 if (debug) { 287 n_blks += sblock.fs_ncg * 288 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 289 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 290 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 291 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree)) 292 printf("%d blocks missing\n", n_blks); 293 if (duplist != NULL) { 294 printf("The following duplicate blocks remain:"); 295 for (dp = duplist; dp; dp = dp->next) 296 printf(" %d,", dp->dup); 297 printf("\n"); 298 } 299 if (zlnhead != NULL) { 300 printf("The following zero link count inodes remain:"); 301 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 302 printf(" %u,", zlnp->zlncnt); 303 printf("\n"); 304 } 305 } 306 zlnhead = (struct zlncnt *)0; 307 duplist = (struct dups *)0; 308 muldup = (struct dups *)0; 309 inocleanup(); 310 if (fsmodified) { 311 sblock.fs_time = time(NULL); 312 sbdirty(); 313 } 314 if (cvtlevel && sblk.b_dirty) { 315 /* 316 * Write out the duplicate super blocks 317 */ 318 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 319 bwrite(fswritefd, (char *)&sblock, 320 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 321 } 322 if (rerun) 323 resolved = 0; 324 325 /* 326 * Check to see if the filesystem is mounted read-write. 327 */ 328 if (mntbuf != NULL && (mntbuf->f_flags & MNT_RDONLY) == 0) 329 resolved = 0; 330 ckfini(resolved); 331 332 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 333 if (inostathead[cylno].il_stat != NULL) 334 free((char *)inostathead[cylno].il_stat); 335 free((char *)inostathead); 336 inostathead = NULL; 337 if (fsmodified && !preen) 338 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 339 if (rerun) 340 printf("\n***** PLEASE RERUN FSCK *****\n"); 341 if (mntbuf != NULL) { 342 struct ufs_args args; 343 int ret; 344 /* 345 * We modified a mounted filesystem. Do a mount update on 346 * it unless it is read-write, so we can continue using it 347 * as safely as possible. 348 */ 349 if (mntbuf->f_flags & MNT_RDONLY) { 350 args.fspec = 0; 351 args.export.ex_flags = 0; 352 args.export.ex_root = 0; 353 ret = mount("ufs", mntbuf->f_mntonname, 354 mntbuf->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 355 if (ret == 0) 356 return (0); 357 pwarn("mount reload of '%s' failed: %s\n\n", 358 mntbuf->f_mntonname, strerror(errno)); 359 } 360 if (!fsmodified) 361 return (0); 362 if (!preen) 363 printf("\n***** REBOOT NOW *****\n"); 364 sync(); 365 return (4); 366 } 367 return (0); 368 } 369 370 /* 371 * Get the directory that the device is mounted on. 372 */ 373 static struct statfs * 374 getmntpt(const char *name) 375 { 376 struct stat devstat, mntdevstat; 377 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 378 char *devname; 379 struct statfs *mntbuf; 380 int i, mntsize; 381 382 if (stat(name, &devstat) != 0 || 383 !(S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))) 384 return (NULL); 385 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 386 for (i = 0; i < mntsize; i++) { 387 if (strcmp(mntbuf[i].f_fstypename, "ufs") != 0) 388 continue; 389 devname = mntbuf[i].f_mntfromname; 390 if (*devname != '/') { 391 strcpy(device, _PATH_DEV); 392 strcat(device, devname); 393 devname = device; 394 } 395 if (stat(devname, &mntdevstat) == 0 && 396 mntdevstat.st_rdev == devstat.st_rdev) 397 return (&mntbuf[i]); 398 } 399 return (NULL); 400 } 401