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 1.8 2004/12/18 21:43:38 swildner 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 #include <string.h> 54 55 #include "fsck.h" 56 57 static int argtoi(int flag, char *req, char *str, int base); 58 static int docheck(struct fstab *fsp); 59 static int checkfilesys(char *filesys, char *mntpt, long auxdata, 60 int child); 61 static struct statfs *getmntpt(const char *); 62 int main(int argc, char *argv[]); 63 64 int 65 main(int argc, char **argv) 66 { 67 int ch; 68 int ret, maxrun = 0; 69 struct rlimit rlimit; 70 71 sync(); 72 while ((ch = getopt(argc, argv, "dfpnNyYb:c:l:m:")) != -1) { 73 switch (ch) { 74 case 'p': 75 preen++; 76 break; 77 78 case 'b': 79 bflag = argtoi('b', "number", optarg, 10); 80 printf("Alternate super block location: %d\n", bflag); 81 break; 82 83 case 'c': 84 cvtlevel = argtoi('c', "conversion level", optarg, 10); 85 break; 86 87 case 'd': 88 debug++; 89 break; 90 91 case 'f': 92 fflag++; 93 break; 94 95 case 'l': 96 maxrun = argtoi('l', "number", optarg, 10); 97 break; 98 99 case 'm': 100 lfmode = argtoi('m', "mode", optarg, 8); 101 if (lfmode &~ 07777) 102 errx(EEXIT, "bad mode to -m: %o", lfmode); 103 printf("** lost+found creation mode %o\n", lfmode); 104 break; 105 106 case 'n': 107 case 'N': 108 nflag++; 109 yflag = 0; 110 break; 111 112 case 'y': 113 case 'Y': 114 yflag++; 115 nflag = 0; 116 break; 117 118 default: 119 errx(EEXIT, "%c option?", ch); 120 } 121 } 122 argc -= optind; 123 argv += optind; 124 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 125 signal(SIGINT, catch); 126 if (preen) 127 signal(SIGQUIT, catchquit); 128 signal(SIGINFO, infohandler); 129 /* 130 * Push up our allowed memory limit so we can cope 131 * with huge filesystems. 132 */ 133 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 134 rlimit.rlim_cur = rlimit.rlim_max; 135 setrlimit(RLIMIT_DATA, &rlimit); 136 } 137 if (argc) { 138 while (argc-- > 0) { 139 char *path = blockcheck(*argv); 140 141 if (path == NULL) 142 pfatal("Can't check %s\n", *argv); 143 else 144 checkfilesys(path, 0, 0L, 0); 145 ++argv; 146 } 147 exit(0); 148 } 149 ret = checkfstab(preen, maxrun, docheck, checkfilesys); 150 if (returntosingle) 151 exit(2); 152 exit(ret); 153 } 154 155 static int 156 argtoi(int flag, char *req, char *str, int base) 157 { 158 char *cp; 159 int ret; 160 161 ret = (int)strtol(str, &cp, base); 162 if (cp == str || *cp) 163 errx(EEXIT, "-%c flag requires a %s", flag, req); 164 return (ret); 165 } 166 167 /* 168 * Determine whether a filesystem should be checked. 169 */ 170 static int 171 docheck(register struct fstab *fsp) 172 { 173 174 if (strcmp(fsp->fs_vfstype, "ufs") || 175 (strcmp(fsp->fs_type, FSTAB_RW) && 176 strcmp(fsp->fs_type, FSTAB_RO)) || 177 fsp->fs_passno == 0) 178 return (0); 179 return (1); 180 } 181 182 /* 183 * Check the specified filesystem. 184 */ 185 /* ARGSUSED */ 186 static int 187 checkfilesys(char *filesys, char *mntpt, long auxdata, int child) 188 { 189 ufs_daddr_t n_ffree, n_bfree; 190 struct dups *dp; 191 struct statfs *mntbuf; 192 struct zlncnt *zlnp; 193 int cylno; 194 195 if (preen && child) 196 signal(SIGQUIT, voidquit); 197 cdevname = filesys; 198 if (debug && preen) 199 pwarn("starting\n"); 200 switch (setup(filesys)) { 201 case 0: 202 if (preen) 203 pfatal("CAN'T CHECK FILE SYSTEM."); 204 return (0); 205 case -1: 206 pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree + 207 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree); 208 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 209 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree, 210 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 211 return (0); 212 } 213 got_siginfo = 0; 214 215 /* 216 * Get the mount point information of the filesystem, if 217 * it is available. 218 */ 219 mntbuf = getmntpt(filesys); 220 221 /* 222 * Cleared if any questions answered no. Used to decide if 223 * the superblock should be marked clean. 224 */ 225 resolved = 1; 226 /* 227 * 1: scan inodes tallying blocks used 228 */ 229 if (preen == 0) { 230 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 231 if (mntbuf != NULL && mntbuf->f_flags & MNT_ROOTFS) 232 printf("** Root file system\n"); 233 printf("** Phase 1 - Check Blocks and Sizes\n"); 234 } 235 pass1(); 236 237 /* 238 * 1b: locate first references to duplicates, if any 239 */ 240 if (duplist) { 241 if (preen || usedsoftdep) 242 pfatal("INTERNAL ERROR: dups with -p"); 243 printf("** Phase 1b - Rescan For More DUPS\n"); 244 pass1b(); 245 } 246 247 /* 248 * 2: traverse directories from root to mark all connected directories 249 */ 250 if (preen == 0) 251 printf("** Phase 2 - Check Pathnames\n"); 252 pass2(); 253 254 /* 255 * 3: scan inodes looking for disconnected directories 256 */ 257 if (preen == 0) 258 printf("** Phase 3 - Check Connectivity\n"); 259 pass3(); 260 261 /* 262 * 4: scan inodes looking for disconnected files; check reference counts 263 */ 264 if (preen == 0) 265 printf("** Phase 4 - Check Reference Counts\n"); 266 pass4(); 267 268 /* 269 * 5: check and repair resource counts in cylinder groups 270 */ 271 if (preen == 0) 272 printf("** Phase 5 - Check Cyl groups\n"); 273 pass5(); 274 275 /* 276 * print out summary statistics 277 */ 278 n_ffree = sblock.fs_cstotal.cs_nffree; 279 n_bfree = sblock.fs_cstotal.cs_nbfree; 280 pwarn("%ld files, %ld used, %ld free ", 281 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); 282 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 283 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize); 284 if (debug && 285 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree)) 286 printf("%d files missing\n", n_files); 287 if (debug) { 288 n_blks += sblock.fs_ncg * 289 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 290 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 291 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 292 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree)) 293 printf("%d blocks missing\n", n_blks); 294 if (duplist != NULL) { 295 printf("The following duplicate blocks remain:"); 296 for (dp = duplist; dp; dp = dp->next) 297 printf(" %d,", dp->dup); 298 printf("\n"); 299 } 300 if (zlnhead != NULL) { 301 printf("The following zero link count inodes remain:"); 302 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 303 printf(" %u,", zlnp->zlncnt); 304 printf("\n"); 305 } 306 } 307 zlnhead = (struct zlncnt *)0; 308 duplist = (struct dups *)0; 309 muldup = (struct dups *)0; 310 inocleanup(); 311 if (fsmodified) { 312 sblock.fs_time = time(NULL); 313 sbdirty(); 314 } 315 if (cvtlevel && sblk.b_dirty) { 316 /* 317 * Write out the duplicate super blocks 318 */ 319 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 320 bwrite(fswritefd, (char *)&sblock, 321 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 322 } 323 if (rerun) 324 resolved = 0; 325 326 /* 327 * Check to see if the filesystem is mounted read-write. 328 */ 329 if (mntbuf != NULL && (mntbuf->f_flags & MNT_RDONLY) == 0) 330 resolved = 0; 331 ckfini(resolved); 332 333 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 334 if (inostathead[cylno].il_stat != NULL) 335 free((char *)inostathead[cylno].il_stat); 336 free((char *)inostathead); 337 inostathead = NULL; 338 if (fsmodified && !preen) 339 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 340 if (rerun) 341 printf("\n***** PLEASE RERUN FSCK *****\n"); 342 if (mntbuf != NULL) { 343 struct ufs_args args; 344 int ret; 345 /* 346 * We modified a mounted filesystem. Do a mount update on 347 * it unless it is read-write, so we can continue using it 348 * as safely as possible. 349 */ 350 if (mntbuf->f_flags & MNT_RDONLY) { 351 args.fspec = 0; 352 args.export.ex_flags = 0; 353 args.export.ex_root = 0; 354 ret = mount("ufs", mntbuf->f_mntonname, 355 mntbuf->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 356 if (ret == 0) 357 return (0); 358 pwarn("mount reload of '%s' failed: %s\n\n", 359 mntbuf->f_mntonname, strerror(errno)); 360 } 361 if (!fsmodified) 362 return (0); 363 if (!preen) 364 printf("\n***** REBOOT NOW *****\n"); 365 sync(); 366 return (4); 367 } 368 return (0); 369 } 370 371 /* 372 * Get the directory that the device is mounted on. 373 */ 374 static struct statfs * 375 getmntpt(const char *name) 376 { 377 struct stat devstat, mntdevstat; 378 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 379 char *devname; 380 struct statfs *mntbuf; 381 int i, mntsize; 382 383 if (stat(name, &devstat) != 0 || 384 !(S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))) 385 return (NULL); 386 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 387 for (i = 0; i < mntsize; i++) { 388 if (strcmp(mntbuf[i].f_fstypename, "ufs") != 0) 389 continue; 390 devname = mntbuf[i].f_mntfromname; 391 if (*devname != '/') { 392 strcpy(device, _PATH_DEV); 393 strcat(device, devname); 394 devname = device; 395 } 396 if (stat(devname, &mntdevstat) == 0 && 397 mntdevstat.st_rdev == devstat.st_rdev) 398 return (&mntbuf[i]); 399 } 400 return (NULL); 401 } 402