sbin/fsck_lfs/main.c

   1 /* $NetBSD: main.c,v 1.41 2010/01/06 18:12:37 christos Exp $     */
   2
   3 /*
   4  * Copyright (c) 1980, 1986, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/time.h>
  34 #include <sys/mount.h>
  35 #include <ufs/ufs/dinode.h>
  36 #include <ufs/ufs/ufsmount.h>
  37 #include <ufs/lfs/lfs.h>
  38
  39 #include <fstab.h>
  40 #include <stdarg.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <ctype.h>
  44 #include <stdio.h>
  45 #include <unistd.h>
  46 #include <err.h>
  47 #include <util.h>
  48 #include <signal.h>
  49
  50 #include "fsck.h"
  51 #include "extern.h"
  52 #include "fsutil.h"
  53 #include "exitvalues.h"
  54
  55 volatile sig_atomic_t returntosingle = 0;
  56
  57 static int argtoi(int, const char *, const char *, int);
  58 static int checkfilesys(const char *, char *, long, int);
  59 static void usage(void);
  60 static void efun(int, const char *, ...);
  61 extern void (*panic_func)(int, const char *, va_list);
  62
  63 static void
  64 efun(int eval, const char *fmt, ...)
  65 {
  66         va_list ap;
  67         va_start(ap, fmt);
  68         verr(EEXIT, fmt, ap);
  69         va_end(ap);
  70 }
  71
  72 int
  73 main(int argc, char **argv)
  74 {
  75         int ch;
  76         int ret = FSCK_EXIT_OK;
  77         const char *optstring = "b:dfi:m:npPqUy";
  78
  79         skipclean = 1;
  80         exitonfail = 0;
  81         idaddr = 0x0;
  82         panic_func = vmsg;
  83         esetfunc(efun);
  84         while ((ch = getopt(argc, argv, optstring)) != -1) {
  85                 switch (ch) {
  86                 case 'b':
  87                         skipclean = 0;
  88                         bflag = argtoi('b', "number", optarg, 0);
  89                         printf("Alternate super block location: %d\n", bflag);
  90                         break;
  91                 case 'd':
  92                         debug++;
  93                         break;
  94                 case 'e':
  95                         exitonfail++;
  96                         break;
  97                 case 'f':
  98                         skipclean = 0;
  99                         break;
 100                 case 'i':
 101                         idaddr = strtol(optarg, NULL, 0);
 102                         break;
 103                 case 'm':
 104                         lfmode = argtoi('m', "mode", optarg, 8);
 105                         if (lfmode & ~07777)
 106                                 err(1, "bad mode to -m: %o\n", lfmode);
 107                         printf("** lost+found creation mode %o\n", lfmode);
 108                         break;
 109
 110                 case 'n':
 111                         nflag++;
 112                         yflag = 0;
 113                         break;
 114
 115                 case 'p':
 116                         preen++;
 117                         break;
 118
 119                 case 'P':               /* Progress meter not implemented. */
 120                         break;
 121
 122                 case 'q':
 123                         quiet++;
 124                         break;
 125 #ifndef SMALL
 126                 case 'U':
 127                         Uflag++;
 128                         break;
 129 #endif
 130                 case 'y':
 131                         yflag++;
 132                         nflag = 0;
 133                         break;
 134
 135                 default:
 136                         usage();
 137                 }
 138         }
 139
 140         argc -= optind;
 141         argv += optind;
 142
 143         if (!argc)
 144                 usage();
 145
 146         if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 147                 (void) signal(SIGINT, catch);
 148         if (preen)
 149                 (void) signal(SIGQUIT, catchquit);
 150
 151         while (argc-- > 0) {
 152                 int nret = checkfilesys(blockcheck(*argv++), 0, 0L, 0);
 153                 if (ret < nret)
 154                         ret = nret;
 155         }
 156
 157         return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
 158 }
 159
 160 static int
 161 argtoi(int flag, const char *req, const char *str, int base)
 162 {
 163         char *cp;
 164         int ret;
 165
 166         ret = (int) strtol(str, &cp, base);
 167         if (cp == str || *cp)
 168                 err(FSCK_EXIT_USAGE, "-%c flag requires a %s\n", flag, req);
 169         return (ret);
 170 }
 171
 172 /*
 173  * Check the specified filesystem.
 174  */
 175
 176 /* ARGSUSED */
 177 static int
 178 checkfilesys(const char *filesys, char *mntpt, long auxdata, int child)
 179 {
 180         struct dups *dp;
 181         struct zlncnt *zlnp;
 182
 183         if (preen && child)
 184                 (void) signal(SIGQUIT, voidquit);
 185         setcdevname(filesys, preen);
 186         if (debug && preen)
 187                 pwarn("starting\n");
 188         switch (setup(filesys)) {
 189         case 0:
 190                 if (preen)
 191                         pfatal("CAN'T CHECK FILE SYSTEM.");
 192         case -1:
 193                 return FSCK_EXIT_OK;
 194         }
 195
 196         /*
 197          * For LFS, "preen" means "roll forward".  We don't check anything
 198          * else.
 199          */
 200         if (preen == 0) {
 201                 printf("** Last Mounted on %s\n", fs->lfs_fsmnt);
 202                 if (hotroot())
 203                         printf("** Root file system\n");
 204                 /*
 205                  * 0: check segment checksums, inode ranges
 206                  */
 207                 printf("** Phase 0 - Check Inode Free List\n");
 208         }
 209
 210         /*
 211          * Check inode free list - we do this even if idaddr is set,
 212          * since if we're writing we don't want to write a bad list.
 213          */
 214         pass0();
 215
 216         if (preen == 0) {
 217                 /*
 218                  * 1: scan inodes tallying blocks used
 219                  */
 220                 printf("** Phase 1 - Check Blocks and Sizes\n");
 221                 pass1();
 222
 223                 /*
 224                  * 2: traverse directories from root to mark all connected directories
 225                  */
 226                 printf("** Phase 2 - Check Pathnames\n");
 227                 pass2();
 228
 229                 /*
 230                  * 3: scan inodes looking for disconnected directories
 231                  */
 232                 printf("** Phase 3 - Check Connectivity\n");
 233                 pass3();
 234
 235                 /*
 236                  * 4: scan inodes looking for disconnected files; check reference counts
 237                  */
 238                 printf("** Phase 4 - Check Reference Counts\n");
 239                 pass4();
 240         }
 241
 242         /*
 243          * 5: check segment byte totals and dirty flags, and cleanerinfo
 244          */
 245         if (!preen)
 246                 printf("** Phase 5 - Check Segment Block Accounting\n");
 247         pass5();
 248
 249         if (debug && !preen) {
 250                 if (duplist != NULL) {
 251                         printf("The following duplicate blocks remain:");
 252                         for (dp = duplist; dp; dp = dp->next)
 253                                 printf(" %lld,", (long long) dp->dup);
 254                         printf("\n");
 255                 }
 256                 if (zlnhead != NULL) {
 257                         printf("The following zero link count inodes remain:");
 258                         for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
 259                                 printf(" %llu,",
 260                                     (unsigned long long)zlnp->zlncnt);
 261                         printf("\n");
 262                 }
 263         }
 264
 265         if (!rerun) {
 266                 if (!preen) {
 267                         if (reply("ROLL FILESYSTEM FORWARD") == 1) {
 268                                 printf("** Phase 6 - Roll Forward\n");
 269                                 pass6();
 270                         }
 271                 }
 272                 else {
 273                         pass6();
 274                 }
 275         }
 276         zlnhead = (struct zlncnt *) 0;
 277         orphead = (struct zlncnt *) 0;
 278         duplist = (struct dups *) 0;
 279         muldup = (struct dups *) 0;
 280         inocleanup();
 281
 282         /*
 283          * print out summary statistics
 284          */
 285         pwarn("%llu files, %lld used, %lld free\n",
 286             (unsigned long long)n_files, (long long) n_blks,
 287             (long long) fs->lfs_bfree);
 288
 289         ckfini(1);
 290
 291         free(blockmap);
 292         free(statemap);
 293         free((char *)lncntp);
 294         if (!fsmodified) {
 295                 return FSCK_EXIT_OK;
 296         }
 297         if (!preen)
 298                 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
 299         if (rerun)
 300                 printf("\n***** PLEASE RERUN FSCK *****\n");
 301         if (hotroot()) {
 302                 struct statvfs stfs_buf;
 303                 /*
 304                  * We modified the root.  Do a mount update on
 305                  * it, unless it is read-write, so we can continue.
 306                  */
 307                 if (statvfs("/", &stfs_buf) == 0) {
 308                         long flags = stfs_buf.f_flag;
 309                         struct ufs_args args;
 310
 311                         if (flags & MNT_RDONLY) {
 312                                 args.fspec = 0;
 313                                 flags |= MNT_UPDATE | MNT_RELOAD;
 314                                 if (mount(MOUNT_LFS, "/", flags,
 315                                     &args, sizeof args) == 0)
 316                                         return FSCK_EXIT_OK;
 317                         }
 318                 }
 319                 if (!preen)
 320                         printf("\n***** REBOOT NOW *****\n");
 321                 sync();
 322                 return FSCK_EXIT_ROOT_CHANGED;
 323         }
 324         return FSCK_EXIT_OK;
 325 }
 326
 327 static void
 328 usage(void)
 329 {
 330
 331         (void) fprintf(stderr,
 332             "Usage: %s [-dfpqU] [-b block] [-m mode] [-y | -n] filesystem ...\n",
 333             getprogname());
 334         exit(FSCK_EXIT_USAGE);
 335 }