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