sbin/fsck_ffs/pass2.c

   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  * 4. 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
  30 #if 0
  31 #ifndef lint
  32 static const char sccsid[] = "@(#)pass2.c       8.9 (Berkeley) 4/28/95";
  33 #endif /* not lint */
  34 #endif
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <sys/param.h>
  39
  40 #include <ufs/ufs/dinode.h>
  41 #include <ufs/ufs/dir.h>
  42 #include <ufs/ffs/fs.h>
  43
  44 #include <err.h>
  45 #include <stdint.h>
  46 #include <string.h>
  47
  48 #include "fsck.h"
  49
  50 #define MINDIRSIZE      (sizeof (struct dirtemplate))
  51
  52 static int blksort(const void *, const void *);
  53 static int pass2check(struct inodesc *);
  54
  55 void
  56 pass2(void)
  57 {
  58         union dinode *dp;
  59         struct inoinfo **inpp, *inp;
  60         struct inoinfo **inpend;
  61         struct inodesc curino;
  62         union dinode dino;
  63         int i;
  64         char pathbuf[MAXPATHLEN + 1];
  65
  66         switch (inoinfo(ROOTINO)->ino_state) {
  67
  68         case USTATE:
  69                 pfatal("ROOT INODE UNALLOCATED");
  70                 if (reply("ALLOCATE") == 0) {
  71                         ckfini(0);
  72                         exit(EEXIT);
  73                 }
  74                 if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
  75                         errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
  76                 break;
  77
  78         case DCLEAR:
  79                 pfatal("DUPS/BAD IN ROOT INODE");
  80                 if (reply("REALLOCATE")) {
  81                         freeino(ROOTINO);
  82                         if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
  83                                 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
  84                         break;
  85                 }
  86                 if (reply("CONTINUE") == 0) {
  87                         ckfini(0);
  88                         exit(EEXIT);
  89                 }
  90                 break;
  91
  92         case FSTATE:
  93         case FCLEAR:
  94                 pfatal("ROOT INODE NOT DIRECTORY");
  95                 if (reply("REALLOCATE")) {
  96                         freeino(ROOTINO);
  97                         if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
  98                                 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
  99                         break;
 100                 }
 101                 if (reply("FIX") == 0) {
 102                         ckfini(0);
 103                         exit(EEXIT);
 104                 }
 105                 dp = ginode(ROOTINO);
 106                 DIP(dp, di_mode) &= ~IFMT;
 107                 DIP(dp, di_mode) |= IFDIR;
 108                 inodirty();
 109                 break;
 110
 111         case DSTATE:
 112                 break;
 113
 114         default:
 115                 errx(EEXIT, "BAD STATE %d FOR ROOT INODE",
 116                     inoinfo(ROOTINO)->ino_state);
 117         }
 118         inoinfo(ROOTINO)->ino_state = DFOUND;
 119         inoinfo(WINO)->ino_state = FSTATE;
 120         inoinfo(WINO)->ino_type = DT_WHT;
 121         /*
 122          * Sort the directory list into disk block order.
 123          */
 124         qsort((char *)inpsort, (size_t)inplast, sizeof *inpsort, blksort);
 125         /*
 126          * Check the integrity of each directory.
 127          */
 128         memset(&curino, 0, sizeof(struct inodesc));
 129         curino.id_type = DATA;
 130         curino.id_func = pass2check;
 131         inpend = &inpsort[inplast];
 132         for (inpp = inpsort; inpp < inpend; inpp++) {
 133                 if (got_siginfo) {
 134                         printf("%s: phase 2: dir %td of %d (%d%%)\n", cdevname,
 135                             inpp - inpsort, (int)inplast,
 136                             (int)((inpp - inpsort) * 100 / inplast));
 137                         got_siginfo = 0;
 138                 }
 139                 if (got_sigalarm) {
 140                         setproctitle("%s p2 %d%%", cdevname,
 141                             (int)((inpp - inpsort) * 100 / inplast));
 142                         got_sigalarm = 0;
 143                 }
 144                 inp = *inpp;
 145                 if (inp->i_isize == 0)
 146                         continue;
 147                 if (inp->i_isize < MINDIRSIZE) {
 148                         direrror(inp->i_number, "DIRECTORY TOO SHORT");
 149                         inp->i_isize = roundup(MINDIRSIZE, DIRBLKSIZ);
 150                         if (reply("FIX") == 1) {
 151                                 dp = ginode(inp->i_number);
 152                                 DIP(dp, di_size) = inp->i_isize;
 153                                 inodirty();
 154                         }
 155                 } else if ((inp->i_isize & (DIRBLKSIZ - 1)) != 0) {
 156                         getpathname(pathbuf, inp->i_number, inp->i_number);
 157                         if (usedsoftdep)
 158                                 pfatal("%s %s: LENGTH %jd NOT MULTIPLE OF %d",
 159                                         "DIRECTORY", pathbuf,
 160                                         (intmax_t)inp->i_isize, DIRBLKSIZ);
 161                         else
 162                                 pwarn("%s %s: LENGTH %jd NOT MULTIPLE OF %d",
 163                                         "DIRECTORY", pathbuf,
 164                                         (intmax_t)inp->i_isize, DIRBLKSIZ);
 165                         if (preen)
 166                                 printf(" (ADJUSTED)\n");
 167                         inp->i_isize = roundup(inp->i_isize, DIRBLKSIZ);
 168                         if (preen || reply("ADJUST") == 1) {
 169                                 dp = ginode(inp->i_number);
 170                                 DIP(dp, di_size) =
 171                                     roundup(inp->i_isize, DIRBLKSIZ);
 172                                 inodirty();
 173                         }
 174                 }
 175                 dp = &dino;
 176                 memset(dp, 0, sizeof(struct ufs2_dinode));
 177                 DIP(dp, di_mode) = IFDIR;
 178                 DIP(dp, di_size) = inp->i_isize;
 179                 for (i = 0;
 180                      i < (inp->i_numblks<NDADDR ? inp->i_numblks : NDADDR);
 181                      i++)
 182                         DIP(dp, di_db[i]) = inp->i_blks[i];
 183                 if (inp->i_numblks > NDADDR)
 184                         for (i = 0; i < NIADDR; i++)
 185                                 DIP(dp, di_ib[i]) = inp->i_blks[NDADDR + i];
 186                 curino.id_number = inp->i_number;
 187                 curino.id_parent = inp->i_parent;
 188                 (void)ckinode(dp, &curino);
 189         }
 190         /*
 191          * Now that the parents of all directories have been found,
 192          * make another pass to verify the value of `..'
 193          */
 194         for (inpp = inpsort; inpp < inpend; inpp++) {
 195                 inp = *inpp;
 196                 if (inp->i_parent == 0 || inp->i_isize == 0)
 197                         continue;
 198                 if (inoinfo(inp->i_parent)->ino_state == DFOUND &&
 199                     inoinfo(inp->i_number)->ino_state == DSTATE)
 200                         inoinfo(inp->i_number)->ino_state = DFOUND;
 201                 if (inp->i_dotdot == inp->i_parent ||
 202                     inp->i_dotdot == (ino_t)-1)
 203                         continue;
 204                 if (inp->i_dotdot == 0) {
 205                         inp->i_dotdot = inp->i_parent;
 206                         fileerror(inp->i_parent, inp->i_number, "MISSING '..'");
 207                         if (reply("FIX") == 0)
 208                                 continue;
 209                         (void)makeentry(inp->i_number, inp->i_parent, "..");
 210                         inoinfo(inp->i_parent)->ino_linkcnt--;
 211                         continue;
 212                 }
 213                 fileerror(inp->i_parent, inp->i_number,
 214                     "BAD INODE NUMBER FOR '..'");
 215                 if (reply("FIX") == 0)
 216                         continue;
 217                 inoinfo(inp->i_dotdot)->ino_linkcnt++;
 218                 inoinfo(inp->i_parent)->ino_linkcnt--;
 219                 inp->i_dotdot = inp->i_parent;
 220                 (void)changeino(inp->i_number, "..", inp->i_parent);
 221         }
 222         /*
 223          * Mark all the directories that can be found from the root.
 224          */
 225         propagate();
 226 }
 227
 228 static int
 229 pass2check(struct inodesc *idesc)
 230 {
 231         struct direct *dirp = idesc->id_dirp;
 232         struct inoinfo *inp;
 233         int n, entrysize, ret = 0;
 234         union dinode *dp;
 235         const char *errmsg;
 236         struct direct proto;
 237         char namebuf[MAXPATHLEN + 1];
 238         char pathbuf[MAXPATHLEN + 1];
 239
 240         /*
 241          * check for "."
 242          */
 243         if (idesc->id_entryno != 0)
 244                 goto chk1;
 245         if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") == 0) {
 246                 if (dirp->d_ino != idesc->id_number) {
 247                         direrror(idesc->id_number, "BAD INODE NUMBER FOR '.'");
 248                         dirp->d_ino = idesc->id_number;
 249                         if (reply("FIX") == 1)
 250                                 ret |= ALTERED;
 251                 }
 252                 if (dirp->d_type != DT_DIR) {
 253                         direrror(idesc->id_number, "BAD TYPE VALUE FOR '.'");
 254                         dirp->d_type = DT_DIR;
 255                         if (reply("FIX") == 1)
 256                                 ret |= ALTERED;
 257                 }
 258                 goto chk1;
 259         }
 260         direrror(idesc->id_number, "MISSING '.'");
 261         proto.d_ino = idesc->id_number;
 262         proto.d_type = DT_DIR;
 263         proto.d_namlen = 1;
 264         (void)strcpy(proto.d_name, ".");
 265         entrysize = DIRSIZ(0, &proto);
 266         if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") != 0) {
 267                 pfatal("CANNOT FIX, FIRST ENTRY IN DIRECTORY CONTAINS %s\n",
 268                         dirp->d_name);
 269         } else if (dirp->d_reclen < entrysize) {
 270                 pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '.'\n");
 271         } else if (dirp->d_reclen < 2 * entrysize) {
 272                 proto.d_reclen = dirp->d_reclen;
 273                 memmove(dirp, &proto, (size_t)entrysize);
 274                 if (reply("FIX") == 1)
 275                         ret |= ALTERED;
 276         } else {
 277                 n = dirp->d_reclen - entrysize;
 278                 proto.d_reclen = entrysize;
 279                 memmove(dirp, &proto, (size_t)entrysize);
 280                 idesc->id_entryno++;
 281                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 282                 dirp = (struct direct *)((char *)(dirp) + entrysize);
 283                 memset(dirp, 0, (size_t)n);
 284                 dirp->d_reclen = n;
 285                 if (reply("FIX") == 1)
 286                         ret |= ALTERED;
 287         }
 288 chk1:
 289         if (idesc->id_entryno > 1)
 290                 goto chk2;
 291         inp = getinoinfo(idesc->id_number);
 292         proto.d_ino = inp->i_parent;
 293         proto.d_type = DT_DIR;
 294         proto.d_namlen = 2;
 295         (void)strcpy(proto.d_name, "..");
 296         entrysize = DIRSIZ(0, &proto);
 297         if (idesc->id_entryno == 0) {
 298                 n = DIRSIZ(0, dirp);
 299                 if (dirp->d_reclen < n + entrysize)
 300                         goto chk2;
 301                 proto.d_reclen = dirp->d_reclen - n;
 302                 dirp->d_reclen = n;
 303                 idesc->id_entryno++;
 304                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 305                 dirp = (struct direct *)((char *)(dirp) + n);
 306                 memset(dirp, 0, (size_t)proto.d_reclen);
 307                 dirp->d_reclen = proto.d_reclen;
 308         }
 309         if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") == 0) {
 310                 inp->i_dotdot = dirp->d_ino;
 311                 if (dirp->d_type != DT_DIR) {
 312                         direrror(idesc->id_number, "BAD TYPE VALUE FOR '..'");
 313                         dirp->d_type = DT_DIR;
 314                         if (reply("FIX") == 1)
 315                                 ret |= ALTERED;
 316                 }
 317                 goto chk2;
 318         }
 319         if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") != 0) {
 320                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 321                 pfatal("CANNOT FIX, SECOND ENTRY IN DIRECTORY CONTAINS %s\n",
 322                         dirp->d_name);
 323                 inp->i_dotdot = (ino_t)-1;
 324         } else if (dirp->d_reclen < entrysize) {
 325                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 326                 pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '..'\n");
 327                 inp->i_dotdot = (ino_t)-1;
 328         } else if (inp->i_parent != 0) {
 329                 /*
 330                  * We know the parent, so fix now.
 331                  */
 332                 inp->i_dotdot = inp->i_parent;
 333                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 334                 proto.d_reclen = dirp->d_reclen;
 335                 memmove(dirp, &proto, (size_t)entrysize);
 336                 if (reply("FIX") == 1)
 337                         ret |= ALTERED;
 338         }
 339         idesc->id_entryno++;
 340         if (dirp->d_ino != 0)
 341                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 342         return (ret|KEEPON);
 343 chk2:
 344         if (dirp->d_ino == 0)
 345                 return (ret|KEEPON);
 346         if (dirp->d_namlen <= 2 &&
 347             dirp->d_name[0] == '.' &&
 348             idesc->id_entryno >= 2) {
 349                 if (dirp->d_namlen == 1) {
 350                         direrror(idesc->id_number, "EXTRA '.' ENTRY");
 351                         dirp->d_ino = 0;
 352                         if (reply("FIX") == 1)
 353                                 ret |= ALTERED;
 354                         return (KEEPON | ret);
 355                 }
 356                 if (dirp->d_name[1] == '.') {
 357                         direrror(idesc->id_number, "EXTRA '..' ENTRY");
 358                         dirp->d_ino = 0;
 359                         if (reply("FIX") == 1)
 360                                 ret |= ALTERED;
 361                         return (KEEPON | ret);
 362                 }
 363         }
 364         idesc->id_entryno++;
 365         n = 0;
 366         if (dirp->d_ino > maxino) {
 367                 fileerror(idesc->id_number, dirp->d_ino, "I OUT OF RANGE");
 368                 n = reply("REMOVE");
 369         } else if (((dirp->d_ino == WINO && dirp->d_type != DT_WHT) ||
 370                     (dirp->d_ino != WINO && dirp->d_type == DT_WHT))) {
 371                 fileerror(idesc->id_number, dirp->d_ino, "BAD WHITEOUT ENTRY");
 372                 dirp->d_ino = WINO;
 373                 dirp->d_type = DT_WHT;
 374                 if (reply("FIX") == 1)
 375                         ret |= ALTERED;
 376         } else {
 377 again:
 378                 switch (inoinfo(dirp->d_ino)->ino_state) {
 379                 case USTATE:
 380                         if (idesc->id_entryno <= 2)
 381                                 break;
 382                         fileerror(idesc->id_number, dirp->d_ino, "UNALLOCATED");
 383                         n = reply("REMOVE");
 384                         break;
 385
 386                 case DCLEAR:
 387                 case FCLEAR:
 388                         if (idesc->id_entryno <= 2)
 389                                 break;
 390                         if (inoinfo(dirp->d_ino)->ino_state == FCLEAR)
 391                                 errmsg = "DUP/BAD";
 392                         else if (!preen && !usedsoftdep)
 393                                 errmsg = "ZERO LENGTH DIRECTORY";
 394                         else {
 395                                 n = 1;
 396                                 break;
 397                         }
 398                         fileerror(idesc->id_number, dirp->d_ino, errmsg);
 399                         if ((n = reply("REMOVE")) == 1)
 400                                 break;
 401                         dp = ginode(dirp->d_ino);
 402                         inoinfo(dirp->d_ino)->ino_state =
 403                            (DIP(dp, di_mode) & IFMT) == IFDIR ? DSTATE : FSTATE;
 404                         inoinfo(dirp->d_ino)->ino_linkcnt = DIP(dp, di_nlink);
 405                         goto again;
 406
 407                 case DSTATE:
 408                         if (inoinfo(idesc->id_number)->ino_state == DFOUND)
 409                                 inoinfo(dirp->d_ino)->ino_state = DFOUND;
 410                         /* FALLTHROUGH */
 411
 412                 case DFOUND:
 413                         inp = getinoinfo(dirp->d_ino);
 414                         if (inp->i_parent != 0 && idesc->id_entryno > 2) {
 415                                 getpathname(pathbuf, idesc->id_number,
 416                                     idesc->id_number);
 417                                 getpathname(namebuf, dirp->d_ino, dirp->d_ino);
 418                                 pwarn("%s%s%s %s %s\n", pathbuf,
 419                                     (strcmp(pathbuf, "/") == 0 ? "" : "/"),
 420                                     dirp->d_name,
 421                                     "IS AN EXTRANEOUS HARD LINK TO DIRECTORY",
 422                                     namebuf);
 423                                 if (cursnapshot != 0)
 424                                         break;
 425                                 if (preen) {
 426                                         printf(" (REMOVED)\n");
 427                                         n = 1;
 428                                         break;
 429                                 }
 430                                 if ((n = reply("REMOVE")) == 1)
 431                                         break;
 432                         }
 433                         if (idesc->id_entryno > 2)
 434                                 inp->i_parent = idesc->id_number;
 435                         /* FALLTHROUGH */
 436
 437                 case FSTATE:
 438                         if (dirp->d_type != inoinfo(dirp->d_ino)->ino_type) {
 439                                 fileerror(idesc->id_number, dirp->d_ino,
 440                                     "BAD TYPE VALUE");
 441                                 dirp->d_type = inoinfo(dirp->d_ino)->ino_type;
 442                                 if (reply("FIX") == 1)
 443                                         ret |= ALTERED;
 444                         }
 445                         inoinfo(dirp->d_ino)->ino_linkcnt--;
 446                         break;
 447
 448                 default:
 449                         errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
 450                             inoinfo(dirp->d_ino)->ino_state, dirp->d_ino);
 451                 }
 452         }
 453         if (n == 0)
 454                 return (ret|KEEPON);
 455         dirp->d_ino = 0;
 456         return (ret|KEEPON|ALTERED);
 457 }
 458
 459 /*
 460  * Routine to sort disk blocks.
 461  */
 462 static int
 463 blksort(const void *arg1, const void *arg2)
 464 {
 465
 466         return ((*(struct inoinfo * const *)arg1)->i_blks[0] -
 467                 (*(struct inoinfo * const *)arg2)->i_blks[0]);
 468 }