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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1986, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)main.c 8.6 (Berkeley) 5/14/95 31 * $FreeBSD: src/sbin/fsck/main.c,v 1.21.2.1 2001/01/23 23:11:07 iedowse Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/stat.h> 36 #include <sys/time.h> 37 #include <sys/mount.h> 38 #include <sys/resource.h> 39 40 #include <vfs/ufs/dinode.h> 41 #include <vfs/ufs/ufsmount.h> 42 #include <vfs/ufs/fs.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <fstab.h> 47 #include <paths.h> 48 #include <string.h> 49 50 #include "fsck.h" 51 52 static int argtoi(int flag, char *req, char *str, int base); 53 static int docheck(struct fstab *fsp); 54 static int checkfilesys(char *filesys, char *mntpt, long auxdata, 55 int child); 56 static struct statfs *getmntpt(const char *); 57 int main(int argc, char *argv[]); 58 59 int 60 main(int argc, char **argv) 61 { 62 int ch; 63 int ret, maxrun = 0; 64 struct rlimit rlimit; 65 66 sync(); 67 while ((ch = getopt(argc, argv, "dfLpnNyYb:c:l:m:")) != -1) { 68 switch (ch) { 69 case 'p': 70 preen++; 71 break; 72 73 case 'b': 74 bflag = argtoi('b', "number", optarg, 10); 75 printf("Alternate super block location: %d\n", bflag); 76 break; 77 78 case 'c': 79 cvtlevel = argtoi('c', "conversion level", optarg, 10); 80 break; 81 82 case 'd': 83 debug++; 84 break; 85 86 case 'f': 87 fflag++; 88 break; 89 90 case 'l': 91 maxrun = argtoi('l', "number", optarg, 10); 92 break; 93 94 case 'L': 95 lastmntonly++; 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 signal(SIGINT, catch); 125 if (preen) 126 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 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 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(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 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, %d 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 (lastmntonly) { 229 printf("** %s Last Mounted on %s\n", filesys, sblock.fs_fsmnt); 230 return (0); 231 } 232 if (preen == 0) { 233 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 234 if (mntbuf != NULL && mntbuf->f_flags & MNT_ROOTFS) 235 printf("** Root file system\n"); 236 printf("** Phase 1 - Check Blocks and Sizes\n"); 237 } 238 pass1(); 239 240 /* 241 * 1b: locate first references to duplicates, if any 242 */ 243 if (duplist) { 244 if (preen || usedsoftdep) 245 pfatal("INTERNAL ERROR: dups with -p"); 246 printf("** Phase 1b - Rescan For More DUPS\n"); 247 pass1b(); 248 } 249 250 /* 251 * 2: traverse directories from root to mark all connected directories 252 */ 253 if (preen == 0) 254 printf("** Phase 2 - Check Pathnames\n"); 255 pass2(); 256 257 /* 258 * 3: scan inodes looking for disconnected directories 259 */ 260 if (preen == 0) 261 printf("** Phase 3 - Check Connectivity\n"); 262 pass3(); 263 264 /* 265 * 4: scan inodes looking for disconnected files; check reference counts 266 */ 267 if (preen == 0) 268 printf("** Phase 4 - Check Reference Counts\n"); 269 pass4(); 270 271 /* 272 * 5: check and repair resource counts in cylinder groups 273 */ 274 if (preen == 0) 275 printf("** Phase 5 - Check Cyl groups\n"); 276 pass5(); 277 278 /* 279 * print out summary statistics 280 */ 281 n_ffree = sblock.fs_cstotal.cs_nffree; 282 n_bfree = sblock.fs_cstotal.cs_nbfree; 283 pwarn("%d files, %d used, %d free ", 284 n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree); 285 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n", 286 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize); 287 if (debug && 288 (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree)) 289 printf("%d files missing\n", n_files); 290 if (debug) { 291 n_blks += sblock.fs_ncg * 292 (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 293 n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 294 n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 295 if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree)) 296 printf("%d blocks missing\n", n_blks); 297 if (duplist != NULL) { 298 printf("The following duplicate blocks remain:"); 299 for (dp = duplist; dp; dp = dp->next) 300 printf(" %d,", dp->dup); 301 printf("\n"); 302 } 303 if (zlnhead != NULL) { 304 printf("The following zero link count inodes remain:"); 305 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 306 printf(" %u,", zlnp->zlncnt); 307 printf("\n"); 308 } 309 } 310 zlnhead = NULL; 311 duplist = NULL; 312 muldup = NULL; 313 inocleanup(); 314 if (fsmodified) { 315 sblock.fs_time = time(NULL); 316 sbdirty(); 317 } 318 if (cvtlevel && sblk.b_dirty) { 319 /* 320 * Write out the duplicate super blocks 321 */ 322 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 323 bwrite(fswritefd, (char *)&sblock, 324 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE); 325 } 326 if (rerun) 327 resolved = 0; 328 329 /* 330 * Check to see if the filesystem is mounted read-write. 331 */ 332 if (mntbuf != NULL && (mntbuf->f_flags & MNT_RDONLY) == 0) 333 resolved = 0; 334 ckfini(resolved); 335 336 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 337 if (inostathead[cylno].il_stat != NULL) 338 free((char *)inostathead[cylno].il_stat); 339 free((char *)inostathead); 340 inostathead = NULL; 341 if (fsmodified && !preen) 342 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 343 if (rerun) 344 printf("\n***** PLEASE RERUN FSCK *****\n"); 345 if (mntbuf != NULL) { 346 struct ufs_args args; 347 int ret; 348 /* 349 * We modified a mounted filesystem. Do a mount update on 350 * it unless it is read-write, so we can continue using it 351 * as safely as possible. 352 */ 353 if (mntbuf->f_flags & MNT_RDONLY) { 354 args.fspec = 0; 355 args.export.ex_flags = 0; 356 args.export.ex_root = 0; 357 ret = mount("ufs", mntbuf->f_mntonname, 358 mntbuf->f_flags | MNT_UPDATE | MNT_RELOAD, &args); 359 if (ret == 0) 360 return (0); 361 pwarn("mount reload of '%s' failed: %s\n\n", 362 mntbuf->f_mntonname, strerror(errno)); 363 } 364 if (!fsmodified) 365 return (0); 366 if (!preen) 367 printf("\n***** REBOOT NOW *****\n"); 368 sync(); 369 return (4); 370 } 371 return (0); 372 } 373 374 /* 375 * Get the directory that the device is mounted on. 376 */ 377 static struct statfs * 378 getmntpt(const char *name) 379 { 380 struct stat devstat, mntdevstat; 381 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 382 char *devname; 383 struct statfs *mntbuf; 384 int i, mntsize; 385 386 if (stat(name, &devstat) != 0 || 387 !(S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))) 388 return (NULL); 389 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 390 for (i = 0; i < mntsize; i++) { 391 if (strcmp(mntbuf[i].f_fstypename, "ufs") != 0) 392 continue; 393 devname = mntbuf[i].f_mntfromname; 394 if (*devname != '/') { 395 strcpy(device, _PATH_DEV); 396 strcat(device, devname); 397 devname = device; 398 } 399 if (stat(devname, &mntdevstat) == 0 && 400 mntdevstat.st_rdev == devstat.st_rdev) 401 return (&mntbuf[i]); 402 } 403 return (NULL); 404 } 405