sbin/fsck/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. 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  * @(#)pass2.c  8.9 (Berkeley) 4/28/95
  30  * $FreeBSD: src/sbin/fsck/pass2.c,v 1.10.2.2 2001/11/24 15:14:59 iedowse Exp $
  31  */
  32
  33 #include <sys/param.h>
  34
  35 #include <vfs/ufs/dinode.h>
  36 #include <vfs/ufs/dir.h>
  37
  38 #include <err.h>
  39 #include <string.h>
  40
  41 #include "fsck.h"
  42
  43 #define MINDIRSIZE      (sizeof (struct dirtemplate))
  44
  45 static int blksort(const void *, const void *);
  46 static int pass2check(struct inodesc *);
  47
  48 void
  49 pass2(void)
  50 {
  51         struct ufs1_dinode *dp;
  52         struct inoinfo **inpp, *inp;
  53         struct inoinfo **inpend;
  54         struct inodesc curino;
  55         struct ufs1_dinode dino;
  56         char pathbuf[MAXPATHLEN + 1];
  57         long i, n;
  58
  59         switch (inoinfo(ROOTINO)->ino_state) {
  60
  61         case USTATE:
  62                 pfatal("ROOT INODE UNALLOCATED");
  63                 if (reply("ALLOCATE") == 0) {
  64                         ckfini(0);
  65                         exit(EEXIT);
  66                 }
  67                 if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
  68                         errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
  69                 break;
  70
  71         case DCLEAR:
  72                 pfatal("DUPS/BAD IN ROOT INODE");
  73                 if (reply("REALLOCATE")) {
  74                         freeino(ROOTINO);
  75                         if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
  76                                 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
  77                         break;
  78                 }
  79                 if (reply("CONTINUE") == 0) {
  80                         ckfini(0);
  81                         exit(EEXIT);
  82                 }
  83                 break;
  84
  85         case FSTATE:
  86         case FCLEAR:
  87                 pfatal("ROOT INODE NOT DIRECTORY");
  88                 if (reply("REALLOCATE")) {
  89                         freeino(ROOTINO);
  90                         if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
  91                                 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE");
  92                         break;
  93                 }
  94                 if (reply("FIX") == 0) {
  95                         ckfini(0);
  96                         exit(EEXIT);
  97                 }
  98                 dp = ginode(ROOTINO);
  99                 dp->di_mode &= ~IFMT;
 100                 dp->di_mode |= IFDIR;
 101                 inodirty();
 102                 break;
 103
 104         case DSTATE:
 105                 break;
 106
 107         default:
 108                 errx(EEXIT, "BAD STATE %d FOR ROOT INODE",
 109                     inoinfo(ROOTINO)->ino_state);
 110         }
 111         inoinfo(ROOTINO)->ino_state = DFOUND;
 112         if (newinofmt) {
 113                 inoinfo(WINO)->ino_state = FSTATE;
 114                 inoinfo(WINO)->ino_type = DT_WHT;
 115         }
 116         /*
 117          * Sort the directory list into disk block order.  Do this in blocks
 118          * of 1000 directories in order to maintain locality of reference
 119          * in memory in case fsck is using swap space.
 120          */
 121         for (i = 0; i < inplast; i += 1000) {
 122                 if ((n = inplast - i) > 1000)
 123                         n = 1000;
 124                 qsort(inpsort + i, (size_t)n, sizeof *inpsort, blksort);
 125         }
 126
 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 %ld (%d%%)\n", cdevname,
 138                             (int)(inpp - inpsort), inplast, (int)((inpp - inpsort) * 100 /
 139                             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 %zu NOT MULTIPLE OF %d",
 158                                         "DIRECTORY", pathbuf, inp->i_isize,
 159                                         DIRBLKSIZ);
 160                         else
 161                                 pwarn("%s %s: LENGTH %zu 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 ufs1_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                 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 == (ufs1_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                         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                 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 ufs1_dinode *dp;
 227         char *errmsg;
 228         struct direct proto;
 229         char namebuf[MAXPATHLEN + 1];
 230         char pathbuf[MAXPATHLEN + 1];
 231
 232         /*
 233          * If converting, set directory entry type.
 234          */
 235         if (doinglevel2 && dirp->d_ino > 0 && dirp->d_ino < maxino) {
 236                 dirp->d_type = inoinfo(dirp->d_ino)->ino_type;
 237                 ret |= ALTERED;
 238         }
 239         /*
 240          * check for "."
 241          */
 242         if (idesc->id_entryno != 0)
 243                 goto chk1;
 244         if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") == 0) {
 245                 if (dirp->d_ino != idesc->id_number) {
 246                         direrror(idesc->id_number, "BAD INODE NUMBER FOR '.'");
 247                         dirp->d_ino = idesc->id_number;
 248                         if (reply("FIX") == 1)
 249                                 ret |= ALTERED;
 250                 }
 251                 if (newinofmt && dirp->d_type != DT_DIR) {
 252                         direrror(idesc->id_number, "BAD TYPE VALUE FOR '.'");
 253                         dirp->d_type = DT_DIR;
 254                         if (reply("FIX") == 1)
 255                                 ret |= ALTERED;
 256                 }
 257                 goto chk1;
 258         }
 259         direrror(idesc->id_number, "MISSING '.'");
 260         proto.d_ino = idesc->id_number;
 261         if (newinofmt)
 262                 proto.d_type = DT_DIR;
 263         else
 264                 proto.d_type = 0;
 265         proto.d_namlen = 1;
 266         strcpy(proto.d_name, ".");
 267 #       if BYTE_ORDER == LITTLE_ENDIAN
 268                 if (!newinofmt) {
 269                         u_char tmp;
 270
 271                         tmp = proto.d_type;
 272                         proto.d_type = proto.d_namlen;
 273                         proto.d_namlen = tmp;
 274                 }
 275 #       endif
 276         entrysize = DIRSIZ(0, &proto);
 277         if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") != 0) {
 278                 pfatal("CANNOT FIX, FIRST ENTRY IN DIRECTORY CONTAINS %s\n",
 279                         dirp->d_name);
 280         } else if (dirp->d_reclen < entrysize) {
 281                 pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '.'\n");
 282         } else if (dirp->d_reclen < 2 * entrysize) {
 283                 proto.d_reclen = dirp->d_reclen;
 284                 memmove(dirp, &proto, (size_t)entrysize);
 285                 if (reply("FIX") == 1)
 286                         ret |= ALTERED;
 287         } else {
 288                 n = dirp->d_reclen - entrysize;
 289                 proto.d_reclen = entrysize;
 290                 memmove(dirp, &proto, (size_t)entrysize);
 291                 idesc->id_entryno++;
 292                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 293                 dirp = (struct direct *)((char *)(dirp) + entrysize);
 294                 memset(dirp, 0, (size_t)n);
 295                 dirp->d_reclen = n;
 296                 if (reply("FIX") == 1)
 297                         ret |= ALTERED;
 298         }
 299 chk1:
 300         if (idesc->id_entryno > 1)
 301                 goto chk2;
 302         inp = getinoinfo(idesc->id_number);
 303         proto.d_ino = inp->i_parent;
 304         if (newinofmt)
 305                 proto.d_type = DT_DIR;
 306         else
 307                 proto.d_type = 0;
 308         proto.d_namlen = 2;
 309         strcpy(proto.d_name, "..");
 310 #       if BYTE_ORDER == LITTLE_ENDIAN
 311                 if (!newinofmt) {
 312                         u_char tmp;
 313
 314                         tmp = proto.d_type;
 315                         proto.d_type = proto.d_namlen;
 316                         proto.d_namlen = tmp;
 317                 }
 318 #       endif
 319         entrysize = DIRSIZ(0, &proto);
 320         if (idesc->id_entryno == 0) {
 321                 n = DIRSIZ(0, dirp);
 322                 if (dirp->d_reclen < n + entrysize)
 323                         goto chk2;
 324                 proto.d_reclen = dirp->d_reclen - n;
 325                 dirp->d_reclen = n;
 326                 idesc->id_entryno++;
 327                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 328                 dirp = (struct direct *)((char *)(dirp) + n);
 329                 memset(dirp, 0, (size_t)proto.d_reclen);
 330                 dirp->d_reclen = proto.d_reclen;
 331         }
 332         if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") == 0) {
 333                 inp->i_dotdot = dirp->d_ino;
 334                 if (newinofmt && dirp->d_type != DT_DIR) {
 335                         direrror(idesc->id_number, "BAD TYPE VALUE FOR '..'");
 336                         dirp->d_type = DT_DIR;
 337                         if (reply("FIX") == 1)
 338                                 ret |= ALTERED;
 339                 }
 340                 goto chk2;
 341         }
 342         if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") != 0) {
 343                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 344                 pfatal("CANNOT FIX, SECOND ENTRY IN DIRECTORY CONTAINS %s\n",
 345                         dirp->d_name);
 346                 inp->i_dotdot = (ufs1_ino_t)-1;
 347         } else if (dirp->d_reclen < entrysize) {
 348                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 349                 pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '..'\n");
 350                 inp->i_dotdot = (ufs1_ino_t)-1;
 351         } else if (inp->i_parent != 0) {
 352                 /*
 353                  * We know the parent, so fix now.
 354                  */
 355                 inp->i_dotdot = inp->i_parent;
 356                 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
 357                 proto.d_reclen = dirp->d_reclen;
 358                 memmove(dirp, &proto, (size_t)entrysize);
 359                 if (reply("FIX") == 1)
 360                         ret |= ALTERED;
 361         }
 362         idesc->id_entryno++;
 363         if (dirp->d_ino != 0)
 364                 inoinfo(dirp->d_ino)->ino_linkcnt--;
 365         return (ret|KEEPON);
 366 chk2:
 367         if (dirp->d_ino == 0)
 368                 return (ret|KEEPON);
 369         if (dirp->d_namlen <= 2 &&
 370             dirp->d_name[0] == '.' &&
 371             idesc->id_entryno >= 2) {
 372                 if (dirp->d_namlen == 1) {
 373                         direrror(idesc->id_number, "EXTRA '.' ENTRY");
 374                         dirp->d_ino = 0;
 375                         if (reply("FIX") == 1)
 376                                 ret |= ALTERED;
 377                         return (KEEPON | ret);
 378                 }
 379                 if (dirp->d_name[1] == '.') {
 380                         direrror(idesc->id_number, "EXTRA '..' ENTRY");
 381                         dirp->d_ino = 0;
 382                         if (reply("FIX") == 1)
 383                                 ret |= ALTERED;
 384                         return (KEEPON | ret);
 385                 }
 386         }
 387         idesc->id_entryno++;
 388         n = 0;
 389         if (dirp->d_ino > maxino) {
 390                 fileerror(idesc->id_number, dirp->d_ino, "I OUT OF RANGE");
 391                 n = reply("REMOVE");
 392         } else if (newinofmt &&
 393                    ((dirp->d_ino == WINO && dirp->d_type != DT_WHT) ||
 394                     (dirp->d_ino != WINO && dirp->d_type == DT_WHT))) {
 395                 fileerror(idesc->id_number, dirp->d_ino, "BAD WHITEOUT ENTRY");
 396                 dirp->d_ino = WINO;
 397                 dirp->d_type = DT_WHT;
 398                 if (reply("FIX") == 1)
 399                         ret |= ALTERED;
 400         } else {
 401 again:
 402                 switch (inoinfo(dirp->d_ino)->ino_state) {
 403                 case USTATE:
 404                         if (idesc->id_entryno <= 2)
 405                                 break;
 406                         fileerror(idesc->id_number, dirp->d_ino, "UNALLOCATED");
 407                         n = reply("REMOVE");
 408                         break;
 409
 410                 case DCLEAR:
 411                 case FCLEAR:
 412                         if (idesc->id_entryno <= 2)
 413                                 break;
 414                         if (inoinfo(dirp->d_ino)->ino_state == FCLEAR)
 415                                 errmsg = "DUP/BAD";
 416                         else if (!preen && !usedsoftdep)
 417                                 errmsg = "ZERO LENGTH DIRECTORY";
 418                         else {
 419                                 n = 1;
 420                                 break;
 421                         }
 422                         fileerror(idesc->id_number, dirp->d_ino, errmsg);
 423                         if ((n = reply("REMOVE")) == 1)
 424                                 break;
 425                         dp = ginode(dirp->d_ino);
 426                         inoinfo(dirp->d_ino)->ino_state =
 427                             (dp->di_mode & IFMT) == IFDIR ? DSTATE : FSTATE;
 428                         inoinfo(dirp->d_ino)->ino_linkcnt = dp->di_nlink;
 429                         goto again;
 430
 431                 case DSTATE:
 432                         if (inoinfo(idesc->id_number)->ino_state == DFOUND)
 433                                 inoinfo(dirp->d_ino)->ino_state = DFOUND;
 434                         /* fall through */
 435
 436                 case DFOUND:
 437                         inp = getinoinfo(dirp->d_ino);
 438                         if (inp->i_parent != 0 && idesc->id_entryno > 2) {
 439                                 getpathname(pathbuf, idesc->id_number,
 440                                     idesc->id_number);
 441                                 getpathname(namebuf, dirp->d_ino, dirp->d_ino);
 442                                 pwarn("%s%s%s %s %s\n", pathbuf,
 443                                     (strcmp(pathbuf, "/") == 0 ? "" : "/"),
 444                                     dirp->d_name,
 445                                     "IS AN EXTRANEOUS HARD LINK TO DIRECTORY",
 446                                     namebuf);
 447                                 if (preen) {
 448                                         printf(" (REMOVED)\n");
 449                                         n = 1;
 450                                         break;
 451                                 }
 452                                 if ((n = reply("REMOVE")) == 1)
 453                                         break;
 454                         }
 455                         if (idesc->id_entryno > 2)
 456                                 inp->i_parent = idesc->id_number;
 457                         /* fall through */
 458
 459                 case FSTATE:
 460                         if (newinofmt &&
 461                             dirp->d_type != inoinfo(dirp->d_ino)->ino_type) {
 462                                 fileerror(idesc->id_number, dirp->d_ino,
 463                                     "BAD TYPE VALUE");
 464                                 dirp->d_type = inoinfo(dirp->d_ino)->ino_type;
 465                                 if (reply("FIX") == 1)
 466                                         ret |= ALTERED;
 467                         }
 468                         inoinfo(dirp->d_ino)->ino_linkcnt--;
 469                         break;
 470
 471                 default:
 472                         errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
 473                             inoinfo(dirp->d_ino)->ino_state, dirp->d_ino);
 474                 }
 475         }
 476         if (n == 0)
 477                 return (ret|KEEPON);
 478         dirp->d_ino = 0;
 479         return (ret|KEEPON|ALTERED);
 480 }
 481
 482 /*
 483  * Routine to sort disk blocks.
 484  */
 485 static int
 486 blksort(const void *arg1, const void *arg2)
 487 {
 488
 489         return ((*(struct inoinfo **)arg1)->i_blks[0] -
 490                 (*(struct inoinfo **)arg2)->i_blks[0]);
 491 }