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         case FZLINK:
  95                 pfatal("ROOT INODE NOT DIRECTORY");
  96                 if (reply("REALLOCATE")) {
  97                         freeino(ROOTINO);
  98                         if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
  99                                 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
 100                         break;
 101                 }
 102                 if (reply("FIX") == 0) {
 103                         ckfini(0);
 104                         exit(EEXIT);
 105                 }
 106                 dp = ginode(ROOTINO);
 107                 DIP_SET(dp, di_mode, DIP(dp, di_mode) & ~IFMT);
 108                 DIP_SET(dp, di_mode, DIP(dp, di_mode) | IFDIR);
 109                 inodirty();
 110                 break;
 111
 112         case DSTATE:
 113         case DZLINK:
 114                 break;
 115
 116         default:
 117                 errx(EEXIT, "BAD STATE %d FOR ROOT INODE",
 118                     inoinfo(ROOTINO)->ino_state);
 119         }
 120         inoinfo(ROOTINO)->ino_state = DFOUND;
 121         inoinfo(WINO)->ino_state = FSTATE;
 122         inoinfo(WINO)->ino_type = DT_WHT;
 123         /*
 124          * Sort the directory list into disk block order.
 125          */
 126         qsort((char *)inpsort, (size_t)inplast, sizeof *inpsort, blksort);
 127         /*
 128          * Check the integrity of each directory.
 129          */
 130         memset(&curino, 0, sizeof(struct inodesc));
 131         curino.id_type = DATA;
 132         curino.id_func = pass2check;
 133         inpend = &inpsort[inplast];
 134         for (inpp = inpsort; inpp < inpend; inpp++) {
 135                 if (got_siginfo) {
 136                         printf("%s: phase 2: dir %td of %d (%d%%)\n", cdevname,
 137                             inpp - inpsort, (int)inplast,
 138                             (int)((inpp - inpsort) * 100 / inplast));
 139                         got_siginfo = 0;
 140                 }
 141                 if (got_sigalarm) {
 142                         setproctitle("%s p2 %d%%", cdevname,
 143                             (int)((inpp - inpsort) * 100 / inplast));
 144                         got_sigalarm = 0;
 145                 }
 146                 inp = *inpp;
 147                 if (inp->i_isize == 0)
 148                         continue;
 149                 if (inp->i_isize < MINDIRSIZE) {
 150                         direrror(inp->i_number, "DIRECTORY TOO SHORT");
 151                         inp->i_isize = roundup(MINDIRSIZE, DIRBLKSIZ);
 152                         if (reply("FIX") == 1) {
 153                                 dp = ginode(inp->i_number);
 154                                 DIP_SET(dp, di_size, inp->i_isize);
 155                                 inodirty();
 156                         }
 157                 } else if ((inp->i_isize & (DIRBLKSIZ - 1)) != 0) {
 158                         getpathname(pathbuf, inp->i_number, inp->i_number);
 159                         if (usedsoftdep)
 160                                 pfatal("%s %s: LENGTH %jd NOT MULTIPLE OF %d",
 161                                         "DIRECTORY", pathbuf,
 162                                         (intmax_t)inp->i_isize, DIRBLKSIZ);
 163                         else
 164                                 pwarn("%s %s: LENGTH %jd NOT MULTIPLE OF %d",
 165                                         "DIRECTORY", pathbuf,
 166                                         (intmax_t)inp->i_isize, DIRBLKSIZ);
 167                         if (preen)
 168                                 printf(" (ADJUSTED)\n");
 169                         inp->i_isize = roundup(inp->i_isize, DIRBLKSIZ);
 170                         if (preen || reply("ADJUST") == 1) {
 171                                 dp = ginode(inp->i_number);
 172                                 DIP_SET(dp, di_size,
 173                                     roundup(inp->i_isize, DIRBLKSIZ));
 174                                 inodirty();
 175                         }
 176                 }
 177                 dp = &dino;
 178                 memset(dp, 0, sizeof(struct ufs2_dinode));
 179                 DIP_SET(dp, di_mode, IFDIR);
 180                 DIP_SET(dp, di_size, inp->i_isize);
 181                 for (i = 0;
 182                      i < (inp->i_numblks<NDADDR ? inp->i_numblks : NDADDR);
 183                      i++)
 184                         DIP_SET(dp, di_db[i], inp->i_blks[i]);
 185                 if (inp->i_numblks > NDADDR)
 186                         for (i = 0; i < NIADDR; i++)
 187                                 DIP_SET(dp, di_ib[i], inp->i_blks[NDADDR + i]);
 188                 curino.id_number = inp->i_number;
 189                 curino.id_parent = inp->i_parent;
 190                 (void)ckinode(dp, &curino);
 191         }
 192         /*
 193          * Now that the parents of all directories have been found,
 194          * make another pass to verify the value of `..'
 195          */
 196         for (inpp = inpsort; inpp < inpend; inpp++) {
 197                 inp = *inpp;
 198                 if (inp->i_parent == 0 || inp->i_isize == 0)
 199                         continue;
 200                 if (inoinfo(inp->i_parent)->ino_state == DFOUND &&
 201                     INO_IS_DUNFOUND(inp->i_number))
 202                         inoinfo(inp->i_number)->ino_state = DFOUND;
 203                 if (inp->i_dotdot == inp->i_parent ||
 204                     inp->i_dotdot == (ino_t)-1)
 205                         continue;
 206                 if (inp->i_dotdot == 0) {
 207                         inp->i_dotdot = inp->i_parent;
 208                         fileerror(inp->i_parent, inp->i_number, "MISSING '..'");
 209                         if (reply("FIX") == 0)
 210                                 continue;
 211                         (void)makeentry(inp->i_number, inp->i_parent, "..");
 212                         inoinfo(inp->i_parent)->ino_linkcnt--;
 213                         continue;
 214                 }
 215                 fileerror(inp->i_parent, inp->i_number,
 216                     "BAD INODE NUMBER FOR '..'");
 217                 if (reply("FIX") == 0)
 218                         continue;
 219                 inoinfo(inp->i_dotdot)->ino_linkcnt++;
 220                 inoinfo(inp->i_parent)->ino_linkcnt--;
 221                 inp->i_dotdot = inp->i_parent;
 222                 (void)changeino(inp->i_number, "..", inp->i_parent);
 223         }
 224         /*
 225          * Mark all the directories that can be found from the root.
 226          */
 227         propagate();
 228 }
 229
 230 static int
 231 pass2check(struct inodesc *idesc)
 232 {
 233         struct direct *dirp = idesc->id_dirp;
 234         struct inoinfo *inp;
 235         int n, entrysize, ret = 0;
 236         union dinode *dp;
 237         const char *errmsg;
 238         struct direct proto;
 239         char namebuf[MAXPATHLEN + 1];
 240         char pathbuf[MAXPATHLEN + 1];
 241
 242         /*
 243          * check for "."
 244          */
 245         if (idesc->id_entryno != 0)
 246                 goto chk1;
 247         if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") == 0) {
 248                 if (dirp->d_ino != idesc->id_number) {
 249                         direrror(idesc->id_number, "BAD INODE NUMBER FOR '.'");
 250                         dirp->d_ino = idesc->id_number;
 251                         if (reply("FIX") == 1)
 252                                 ret |= ALTERED;
 253                 }
 254                 if (dirp->d_type != DT_DIR) {
 255                         direrror(idesc->id_number, "BAD TYPE VALUE FOR '.'");
 256                         dirp->d_type = DT_DIR;
 257                         if (reply("FIX") == 1)
 258                                 ret |= ALTERED;
 259                 }
 260                 goto chk1;
 261         }
 262         direrror(idesc->id_number, "MISSING '.'");
 263         proto.d_ino = idesc->id_number;
 264         proto.d_type = DT_DIR;
 265         proto.d_namlen = 1;
 266         (void)strcpy(proto.d_name, ".");
 267         entrysize = DIRSIZ(0, &proto);
 268         if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") != 0) {
 269                 pfatal("CANNOT FIX, FIRST ENTRY IN DIRECTORY CONTAINS %s\n",
 270                         dirp->d_name);
 271         } else if (dirp->d_reclen < entrysize) {
 272                 pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '.'\n");
 273         } else if (dirp->d_reclen < 2 * entrysize) {
 274                 proto.d_reclen = dirp->d_reclen;
 275                 memmove(dirp, &proto, (size_t)entrysize);
 276                 if (reply("FIX") == 1)
 277                         ret |= ALTERED;
 278         } else {
 279                 n = dirp->d_reclen - entrysize;
 280                 proto.d_reclen = entrysize;
 281                 memmove(dirp, &proto, (size_t)entrysize);
 282                 idesc->id_entryno++;
 283                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 284                 dirp = (struct direct *)((char *)(dirp) + entrysize);
 285                 memset(dirp, 0, (size_t)n);
 286                 dirp->d_reclen = n;
 287                 if (reply("FIX") == 1)
 288                         ret |= ALTERED;
 289         }
 290 chk1:
 291         if (idesc->id_entryno > 1)
 292                 goto chk2;
 293         inp = getinoinfo(idesc->id_number);
 294         proto.d_ino = inp->i_parent;
 295         proto.d_type = DT_DIR;
 296         proto.d_namlen = 2;
 297         (void)strcpy(proto.d_name, "..");
 298         entrysize = DIRSIZ(0, &proto);
 299         if (idesc->id_entryno == 0) {
 300                 n = DIRSIZ(0, dirp);
 301                 if (dirp->d_reclen < n + entrysize)
 302                         goto chk2;
 303                 proto.d_reclen = dirp->d_reclen - n;
 304                 dirp->d_reclen = n;
 305                 idesc->id_entryno++;
 306                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 307                 dirp = (struct direct *)((char *)(dirp) + n);
 308                 memset(dirp, 0, (size_t)proto.d_reclen);
 309                 dirp->d_reclen = proto.d_reclen;
 310         }
 311         if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") == 0) {
 312                 inp->i_dotdot = dirp->d_ino;
 313                 if (dirp->d_type != DT_DIR) {
 314                         direrror(idesc->id_number, "BAD TYPE VALUE FOR '..'");
 315                         dirp->d_type = DT_DIR;
 316                         if (reply("FIX") == 1)
 317                                 ret |= ALTERED;
 318                 }
 319                 goto chk2;
 320         }
 321         if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") != 0) {
 322                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 323                 pfatal("CANNOT FIX, SECOND ENTRY IN DIRECTORY CONTAINS %s\n",
 324                         dirp->d_name);
 325                 inp->i_dotdot = (ino_t)-1;
 326         } else if (dirp->d_reclen < entrysize) {
 327                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 328                 pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '..'\n");
 329                 inp->i_dotdot = (ino_t)-1;
 330         } else if (inp->i_parent != 0) {
 331                 /*
 332                  * We know the parent, so fix now.
 333                  */
 334                 inp->i_dotdot = inp->i_parent;
 335                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 336                 proto.d_reclen = dirp->d_reclen;
 337                 memmove(dirp, &proto, (size_t)entrysize);
 338                 if (reply("FIX") == 1)
 339                         ret |= ALTERED;
 340         }
 341         idesc->id_entryno++;
 342         if (dirp->d_ino != 0)
 343                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 344         return (ret|KEEPON);
 345 chk2:
 346         if (dirp->d_ino == 0)
 347                 return (ret|KEEPON);
 348         if (dirp->d_namlen <= 2 &&
 349             dirp->d_name[0] == '.' &&
 350             idesc->id_entryno >= 2) {
 351                 if (dirp->d_namlen == 1) {
 352                         direrror(idesc->id_number, "EXTRA '.' ENTRY");
 353                         dirp->d_ino = 0;
 354                         if (reply("FIX") == 1)
 355                                 ret |= ALTERED;
 356                         return (KEEPON | ret);
 357                 }
 358                 if (dirp->d_name[1] == '.') {
 359                         direrror(idesc->id_number, "EXTRA '..' ENTRY");
 360                         dirp->d_ino = 0;
 361                         if (reply("FIX") == 1)
 362                                 ret |= ALTERED;
 363                         return (KEEPON | ret);
 364                 }
 365         }
 366         idesc->id_entryno++;
 367         n = 0;
 368         if (dirp->d_ino > maxino) {
 369                 fileerror(idesc->id_number, dirp->d_ino, "I OUT OF RANGE");
 370                 n = reply("REMOVE");
 371         } else if (((dirp->d_ino == WINO && dirp->d_type != DT_WHT) ||
 372                     (dirp->d_ino != WINO && dirp->d_type == DT_WHT))) {
 373                 fileerror(idesc->id_number, dirp->d_ino, "BAD WHITEOUT ENTRY");
 374                 dirp->d_ino = WINO;
 375                 dirp->d_type = DT_WHT;
 376                 if (reply("FIX") == 1)
 377                         ret |= ALTERED;
 378         } else {
 379 again:
 380                 switch (inoinfo(dirp->d_ino)->ino_state) {
 381                 case USTATE:
 382                         if (idesc->id_entryno <= 2)
 383                                 break;
 384                         fileerror(idesc->id_number, dirp->d_ino, "UNALLOCATED");
 385                         n = reply("REMOVE");
 386                         break;
 387
 388                 case DCLEAR:
 389                 case FCLEAR:
 390                         if (idesc->id_entryno <= 2)
 391                                 break;
 392                         if (inoinfo(dirp->d_ino)->ino_state == FCLEAR)
 393                                 errmsg = "DUP/BAD";
 394                         else if (!preen && !usedsoftdep)
 395                                 errmsg = "ZERO LENGTH DIRECTORY";
 396                         else {
 397                                 n = 1;
 398                                 break;
 399                         }
 400                         fileerror(idesc->id_number, dirp->d_ino, errmsg);
 401                         if ((n = reply("REMOVE")) == 1)
 402                                 break;
 403                         dp = ginode(dirp->d_ino);
 404                         inoinfo(dirp->d_ino)->ino_state =
 405                            (DIP(dp, di_mode) & IFMT) == IFDIR ? DSTATE : FSTATE;
 406                         inoinfo(dirp->d_ino)->ino_linkcnt = DIP(dp, di_nlink);
 407                         goto again;
 408
 409                 case DSTATE:
 410                 case DZLINK:
 411                         if (inoinfo(idesc->id_number)->ino_state == DFOUND)
 412                                 inoinfo(dirp->d_ino)->ino_state = DFOUND;
 413                         /* FALLTHROUGH */
 414
 415                 case DFOUND:
 416                         inp = getinoinfo(dirp->d_ino);
 417                         if (inp->i_parent != 0 && idesc->id_entryno > 2) {
 418                                 getpathname(pathbuf, idesc->id_number,
 419                                     idesc->id_number);
 420                                 getpathname(namebuf, dirp->d_ino, dirp->d_ino);
 421                                 pwarn("%s%s%s %s %s\n", pathbuf,
 422                                     (strcmp(pathbuf, "/") == 0 ? "" : "/"),
 423                                     dirp->d_name,
 424                                     "IS AN EXTRANEOUS HARD LINK TO DIRECTORY",
 425                                     namebuf);
 426                                 if (cursnapshot != 0)
 427                                         break;
 428                                 if (preen) {
 429                                         printf(" (REMOVED)\n");
 430                                         n = 1;
 431                                         break;
 432                                 }
 433                                 if ((n = reply("REMOVE")) == 1)
 434                                         break;
 435                         }
 436                         if (idesc->id_entryno > 2)
 437                                 inp->i_parent = idesc->id_number;
 438                         /* FALLTHROUGH */
 439
 440                 case FSTATE:
 441                 case FZLINK:
 442                         if (dirp->d_type != inoinfo(dirp->d_ino)->ino_type) {
 443                                 fileerror(idesc->id_number, dirp->d_ino,
 444                                     "BAD TYPE VALUE");
 445                                 dirp->d_type = inoinfo(dirp->d_ino)->ino_type;
 446                                 if (reply("FIX") == 1)
 447                                         ret |= ALTERED;
 448                         }
 449                         inoinfo(dirp->d_ino)->ino_linkcnt--;
 450                         break;
 451
 452                 default:
 453                         errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
 454                             inoinfo(dirp->d_ino)->ino_state, dirp->d_ino);
 455                 }
 456         }
 457         if (n == 0)
 458                 return (ret|KEEPON);
 459         dirp->d_ino = 0;
 460         return (ret|KEEPON|ALTERED);
 461 }
 462
 463 /*
 464  * Routine to sort disk blocks.
 465  */
 466 static int
 467 blksort(const void *arg1, const void *arg2)
 468 {
 469
 470         return ((*(struct inoinfo * const *)arg1)->i_blks[0] -
 471                 (*(struct inoinfo * const *)arg2)->i_blks[0]);
 472 }