sbin/fsck_ffs/dir.c

   1 /*      $NetBSD: dir.c,v 1.51 2008/07/08 08:14:37 simonb 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/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)dir.c       8.8 (Berkeley) 4/28/95";
  36 #else
  37 __RCSID("$NetBSD: dir.c,v 1.51 2008/07/08 08:14:37 simonb Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <sys/param.h>
  42 #include <sys/time.h>
  43
  44 #include <ufs/ufs/dinode.h>
  45 #include <ufs/ufs/dir.h>
  46 #include <ufs/ffs/fs.h>
  47 #include <ufs/ffs/ffs_extern.h>
  48
  49 #include <err.h>
  50 #include <stdio.h>
  51 #include <string.h>
  52
  53 #include "fsck.h"
  54 #include "fsutil.h"
  55 #include "extern.h"
  56
  57 const char      *lfname = "lost+found";
  58 int     lfmode = 01700;
  59 ino_t   lfdir;
  60 struct  dirtemplate emptydir = {
  61         .dot_ino = 0,
  62         .dot_reclen = DIRBLKSIZ,
  63 };
  64 struct  dirtemplate dirhead = {
  65         .dot_ino = 0,
  66         .dot_reclen = 12,
  67         .dot_type = DT_DIR,
  68         .dot_namlen = 1,
  69         .dot_name = ".",
  70         .dotdot_ino = 0,
  71         .dotdot_reclen = DIRBLKSIZ - 12,
  72         .dotdot_type = DT_DIR,
  73         .dotdot_namlen = 2,
  74         .dotdot_name = "..",
  75 };
  76 struct  odirtemplate odirhead = {
  77         .dot_ino = 0,
  78         .dot_reclen = 12,
  79         .dot_namlen = 1,
  80         .dot_name = ".",
  81         .dotdot_ino = 0,
  82         .dotdot_reclen = DIRBLKSIZ - 12,
  83         .dotdot_namlen = 2,
  84         .dotdot_name = "..",
  85 };
  86
  87 static int chgino(struct  inodesc *);
  88 static int dircheck(struct inodesc *, struct direct *);
  89 static int expanddir(union dinode *, char *);
  90 static void freedir(ino_t, ino_t);
  91 static struct direct *fsck_readdir(struct inodesc *);
  92 static struct bufarea *getdirblk(daddr_t, long);
  93 static int lftempname(char *, ino_t);
  94 static int mkentry(struct inodesc *);
  95 void reparent(ino_t, ino_t);
  96
  97 /*
  98  * Propagate connected state through the tree.
  99  */
 100 void
 101 propagate(ino_t inumber)
 102 {
 103         struct inoinfo *inp;
 104
 105         inp = getinoinfo(inumber);
 106
 107         for (;;) {
 108                 inoinfo(inp->i_number)->ino_state = DMARK;
 109                 if (inp->i_child &&
 110                     inoinfo(inp->i_child->i_number)->ino_state != DMARK)
 111                         inp = inp->i_child;
 112                 else if (inp->i_number == inumber)
 113                         break;
 114                 else if (inp->i_sibling)
 115                         inp = inp->i_sibling;
 116                 else
 117                         inp = getinoinfo(inp->i_parent);
 118         }
 119
 120         for (;;) {
 121                 inoinfo(inp->i_number)->ino_state = DFOUND;
 122                 if (inp->i_child &&
 123                     inoinfo(inp->i_child->i_number)->ino_state != DFOUND)
 124                         inp = inp->i_child;
 125                 else if (inp->i_number == inumber)
 126                         break;
 127                 else if (inp->i_sibling)
 128                         inp = inp->i_sibling;
 129                 else
 130                         inp = getinoinfo(inp->i_parent);
 131         }
 132 }
 133
 134 void
 135 reparent(ino_t inumber, ino_t parent)
 136 {
 137         struct inoinfo *inp, *pinp;
 138
 139         inp = getinoinfo(inumber);
 140         inp->i_parent = inp->i_dotdot = parent;
 141         pinp = getinoinfo(parent);
 142         inp->i_sibling = pinp->i_child;
 143         pinp->i_child = inp;
 144         propagate(inumber);
 145 }
 146
 147 /*
 148  * Scan each entry in a directory block.
 149  */
 150 int
 151 dirscan(struct inodesc *idesc)
 152 {
 153         struct direct *dp;
 154         struct bufarea *bp;
 155         int dsize, n;
 156         long blksiz;
 157 #if DIRBLKSIZ > APPLEUFS_DIRBLKSIZ
 158         char dbuf[DIRBLKSIZ];
 159 #else
 160         char dbuf[APPLEUFS_DIRBLKSIZ];
 161 #endif
 162
 163         if (idesc->id_type != DATA)
 164                 errexit("wrong type to dirscan %d", idesc->id_type);
 165         if (idesc->id_entryno == 0 &&
 166             (idesc->id_filesize & (dirblksiz - 1)) != 0)
 167                 idesc->id_filesize = roundup(idesc->id_filesize, dirblksiz);
 168         blksiz = idesc->id_numfrags * sblock->fs_fsize;
 169         if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
 170                 idesc->id_filesize -= blksiz;
 171                 return (SKIP);
 172         }
 173
 174         /*
 175          * If we are are swapping byte order in directory entries, just swap
 176          * this block and return.
 177          */
 178         if (do_dirswap) {
 179                 int off;
 180                 bp = getdirblk(idesc->id_blkno, blksiz);
 181                 for (off = 0; off < blksiz; off += iswap16(dp->d_reclen)) {
 182                         dp = (struct direct *)(bp->b_un.b_buf + off);
 183                         dp->d_ino = bswap32(dp->d_ino);
 184                         dp->d_reclen = bswap16(dp->d_reclen);
 185                         if (!newinofmt) {
 186                                 u_int8_t tmp = dp->d_namlen;
 187                                 dp->d_namlen = dp->d_type;
 188                                 dp->d_type = tmp;
 189                         }
 190                         if (dp->d_reclen == 0)
 191                                 break;
 192                 }
 193                 dirty(bp);
 194                 idesc->id_filesize -= blksiz;
 195                 return (idesc->id_filesize > 0 ? KEEPON : STOP);
 196         }
 197
 198         idesc->id_loc = 0;
 199         for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
 200                 dsize = iswap16(dp->d_reclen);
 201                 if (dsize > (int)sizeof dbuf)
 202                         dsize = sizeof dbuf;
 203                 memmove(dbuf, dp, (size_t)dsize);
 204 #               if (BYTE_ORDER == LITTLE_ENDIAN)
 205                         if (!newinofmt && !needswap) {
 206 #               else
 207                         if (!newinofmt && needswap) {
 208 #               endif
 209                                 struct direct *tdp = (struct direct *)dbuf;
 210                                 u_char tmp;
 211
 212                                 tmp = tdp->d_namlen;
 213                                 tdp->d_namlen = tdp->d_type;
 214                                 tdp->d_type = tmp;
 215                         }
 216                 idesc->id_dirp = (struct direct *)dbuf;
 217                 if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
 218 #                       if (BYTE_ORDER == LITTLE_ENDIAN)
 219                                 if (!newinofmt && !doinglevel2 && !needswap) {
 220 #                       else
 221                                 if (!newinofmt && !doinglevel2 && needswap) {
 222 #                       endif
 223                                         struct direct *tdp;
 224                                         u_char tmp;
 225
 226                                         tdp = (struct direct *)dbuf;
 227                                         tmp = tdp->d_namlen;
 228                                         tdp->d_namlen = tdp->d_type;
 229                                         tdp->d_type = tmp;
 230                                 }
 231                         bp = getdirblk(idesc->id_blkno, blksiz);
 232                         memmove(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf,
 233                             (size_t)dsize);
 234                         dirty(bp);
 235                         sbdirty();
 236                 }
 237                 if (n & STOP)
 238                         return (n);
 239         }
 240         return (idesc->id_filesize > 0 ? KEEPON : STOP);
 241 }
 242
 243 /*
 244  * get next entry in a directory.
 245  */
 246 static struct direct *
 247 fsck_readdir(struct inodesc *idesc)
 248 {
 249         struct direct *dp, *ndp;
 250         struct bufarea *bp;
 251         long size, blksiz, fix, dploc;
 252
 253         blksiz = idesc->id_numfrags * sblock->fs_fsize;
 254         bp = getdirblk(idesc->id_blkno, blksiz);
 255         if (idesc->id_loc % dirblksiz == 0 && idesc->id_filesize > 0 &&
 256             idesc->id_loc < blksiz) {
 257                 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 258                 if (dircheck(idesc, dp))
 259                         goto dpok;
 260                 if (idesc->id_fix == IGNORE)
 261                         return (0);
 262                 fix = dofix(idesc, "DIRECTORY CORRUPTED");
 263                 bp = getdirblk(idesc->id_blkno, blksiz);
 264                 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 265                 dp->d_reclen = iswap16(dirblksiz);
 266                 dp->d_ino = 0;
 267                 dp->d_type = 0;
 268                 dp->d_namlen = 0;
 269                 dp->d_name[0] = '\0';
 270                 if (fix)
 271                         dirty(bp);
 272                 else
 273                         markclean = 0;
 274                 idesc->id_loc += dirblksiz;
 275                 idesc->id_filesize -= dirblksiz;
 276                 return (dp);
 277         }
 278 dpok:
 279         if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
 280                 return NULL;
 281         dploc = idesc->id_loc;
 282         dp = (struct direct *)(bp->b_un.b_buf + dploc);
 283         idesc->id_loc += iswap16(dp->d_reclen);
 284         idesc->id_filesize -= iswap16(dp->d_reclen);
 285         if ((idesc->id_loc % dirblksiz) == 0)
 286                 return (dp);
 287         ndp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 288         if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
 289             dircheck(idesc, ndp) == 0) {
 290                 size = dirblksiz - (idesc->id_loc % dirblksiz);
 291                 idesc->id_loc += size;
 292                 idesc->id_filesize -= size;
 293                 if (idesc->id_fix == IGNORE)
 294                         return (0);
 295                 fix = dofix(idesc, "DIRECTORY CORRUPTED");
 296                 bp = getdirblk(idesc->id_blkno, blksiz);
 297                 dp = (struct direct *)(bp->b_un.b_buf + dploc);
 298                 dp->d_reclen = iswap16(iswap16(dp->d_reclen) + size);
 299                 if (fix)
 300                         dirty(bp);
 301                 else
 302                         markclean = 0;
 303         }
 304         return (dp);
 305 }
 306
 307 /*
 308  * Verify that a directory entry is valid.
 309  * This is a superset of the checks made in the kernel.
 310  */
 311 static int
 312 dircheck(struct inodesc *idesc, struct direct *dp)
 313 {
 314         int size;
 315         char *cp;
 316         u_char namlen, type;
 317         int spaceleft;
 318
 319         spaceleft = dirblksiz - (idesc->id_loc % dirblksiz);
 320         if (iswap32(dp->d_ino) >= maxino ||
 321             dp->d_reclen == 0 ||
 322             iswap16(dp->d_reclen) > spaceleft ||
 323             (iswap16(dp->d_reclen) & 0x3) != 0)
 324                 return (0);
 325         if (dp->d_ino == 0)
 326                 return (1);
 327         size = DIRSIZ(!newinofmt, dp, needswap);
 328 #       if (BYTE_ORDER == LITTLE_ENDIAN)
 329                 if (!newinofmt && !needswap) {
 330 #       else
 331                 if (!newinofmt && needswap) {
 332 #       endif
 333                         type = dp->d_namlen;
 334                         namlen = dp->d_type;
 335                 } else {
 336                         namlen = dp->d_namlen;
 337                         type = dp->d_type;
 338                 }
 339         if (iswap16(dp->d_reclen) < size ||
 340             idesc->id_filesize < size ||
 341             /* namlen > MAXNAMLEN || */
 342             type > 15)
 343                 return (0);
 344         for (cp = dp->d_name, size = 0; size < namlen; size++)
 345                 if (*cp == '\0' || (*cp++ == '/'))
 346                         return (0);
 347         if (*cp != '\0')
 348                 return (0);
 349         return (1);
 350 }
 351
 352 void
 353 direrror(ino_t ino, const char *errmesg)
 354 {
 355
 356         fileerror(ino, ino, errmesg);
 357 }
 358
 359 void
 360 fileerror(ino_t cwd, ino_t ino, const char *errmesg)
 361 {
 362         union dinode *dp;
 363         char pathbuf[MAXPATHLEN + 1];
 364         uint16_t mode;
 365
 366         pwarn("%s ", errmesg);
 367         pinode(ino);
 368         printf("\n");
 369         getpathname(pathbuf, sizeof(pathbuf), cwd, ino);
 370         if (ino < ROOTINO || ino > maxino) {
 371                 pfatal("NAME=%s\n", pathbuf);
 372                 return;
 373         }
 374         dp = ginode(ino);
 375         if (ftypeok(dp)) {
 376                 mode = DIP(dp, mode);
 377                 pfatal("%s=%s\n",
 378                     (iswap16(mode) & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf);
 379         }
 380         else
 381                 pfatal("NAME=%s\n", pathbuf);
 382 }
 383
 384 void
 385 adjust(struct inodesc *idesc, int lcnt)
 386 {
 387         union dinode *dp;
 388         int16_t nlink;
 389         int saveresolved;
 390
 391         dp = ginode(idesc->id_number);
 392         nlink = iswap16(DIP(dp, nlink));
 393         if (nlink == lcnt) {
 394                 /*
 395                  * If we have not hit any unresolved problems, are running
 396                  * in preen mode, and are on a file system using soft updates,
 397                  * then just toss any partially allocated files.
 398                  */
 399                 if (resolved && preen && usedsoftdep) {
 400                         clri(idesc, "UNREF", 1);
 401                         return;
 402                 } else {
 403                         /*
 404                          * The file system can be marked clean even if
 405                          * a file is not linked up, but is cleared.
 406                          * Hence, resolved should not be cleared when
 407                          * linkup is answered no, but clri is answered yes.
 408                          */
 409                         saveresolved = resolved;
 410                         if (linkup(idesc->id_number, (ino_t)0, NULL) == 0) {
 411                                 resolved = saveresolved;
 412                                 clri(idesc, "UNREF", 0);
 413                                 return;
 414                         }
 415                         /*
 416                          * Account for the new reference created by linkup().
 417                          */
 418                         dp = ginode(idesc->id_number);
 419                         lcnt--;
 420                 }
 421         }
 422         if (lcnt != 0) {
 423                 pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
 424                         ((iswap16(DIP(dp, mode)) & IFMT) == IFDIR ?
 425                         "DIR" : "FILE"));
 426                 pinode(idesc->id_number);
 427                 printf(" COUNT %d SHOULD BE %d",
 428                         nlink, nlink - lcnt);
 429                 if (preen || usedsoftdep) {
 430                         if (lcnt < 0) {
 431                                 printf("\n");
 432                                 pfatal("LINK COUNT INCREASING");
 433                         }
 434                         if (preen)
 435                                 printf(" (ADJUSTED)\n");
 436                 }
 437                 if (preen || reply("ADJUST") == 1) {
 438                         DIP_SET(dp, nlink, iswap16(nlink - lcnt));
 439                         inodirty();
 440                 } else
 441                         markclean = 0;
 442         }
 443 }
 444
 445 static int
 446 mkentry(struct inodesc *idesc)
 447 {
 448         struct direct *dirp = idesc->id_dirp;
 449         struct direct newent;
 450         int newlen, oldlen;
 451
 452         newent.d_namlen = strlen(idesc->id_name);
 453         newlen = DIRSIZ(0, &newent, 0);
 454         if (dirp->d_ino != 0)
 455                 oldlen = DIRSIZ(0, dirp, 0);
 456         else
 457                 oldlen = 0;
 458         if (iswap16(dirp->d_reclen) - oldlen < newlen)
 459                 return (KEEPON);
 460         newent.d_reclen = iswap16(iswap16(dirp->d_reclen) - oldlen);
 461         dirp->d_reclen = iswap16(oldlen);
 462         dirp = (struct direct *)(((char *)dirp) + oldlen);
 463         /* ino to be entered is in id_parent */
 464         dirp->d_ino = iswap32(idesc->id_parent);
 465         dirp->d_reclen = newent.d_reclen;
 466         if (newinofmt)
 467                 dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
 468         else
 469                 dirp->d_type = 0;
 470         dirp->d_namlen = newent.d_namlen;
 471         memmove(dirp->d_name, idesc->id_name, (size_t)newent.d_namlen + 1);
 472 #       if (BYTE_ORDER == LITTLE_ENDIAN)
 473                 /*
 474                  * If the entry was split, dirscan() will only reverse the byte
 475                  * order of the original entry, and not the new one, before
 476                  * writing it back out.  So, we reverse the byte order here if
 477                  * necessary.
 478                  */
 479                 if (oldlen != 0 && !newinofmt && !doinglevel2 && !needswap) {
 480 #       else
 481                 if (oldlen != 0 && !newinofmt && !doinglevel2 && needswap) {
 482 #       endif
 483                         u_char tmp;
 484
 485                         tmp = dirp->d_namlen;
 486                         dirp->d_namlen = dirp->d_type;
 487                         dirp->d_type = tmp;
 488                 }
 489         return (ALTERED|STOP);
 490 }
 491
 492 static int
 493 chgino(struct inodesc *idesc)
 494 {
 495         struct direct *dirp = idesc->id_dirp;
 496
 497         if (memcmp(dirp->d_name, idesc->id_name, (int)dirp->d_namlen + 1))
 498                 return (KEEPON);
 499         dirp->d_ino = iswap32(idesc->id_parent);
 500         if (newinofmt)
 501                 dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
 502         else
 503                 dirp->d_type = 0;
 504         return (ALTERED|STOP);
 505 }
 506
 507 int
 508 linkup(ino_t orphan, ino_t parentdir, char *name)
 509 {
 510         union dinode *dp;
 511         int lostdir;
 512         ino_t oldlfdir;
 513         struct inodesc idesc;
 514         char tempname[BUFSIZ];
 515         int16_t nlink;
 516         uint16_t mode;
 517
 518         memset(&idesc, 0, sizeof(struct inodesc));
 519         dp = ginode(orphan);
 520         mode = iswap16(DIP(dp, mode));
 521         nlink = iswap16(DIP(dp, nlink));
 522         lostdir = (mode & IFMT) == IFDIR;
 523         pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
 524         pinode(orphan);
 525         if (preen  && DIP(dp, size) == 0)
 526                 return (0);
 527         if (preen)
 528                 printf(" (RECONNECTED)\n");
 529         else
 530                 if (reply("RECONNECT") == 0) {
 531                         markclean = 0;
 532                         return (0);
 533                 }
 534         if (parentdir != 0)
 535                 inoinfo(parentdir)->ino_linkcnt++;
 536         if (lfdir == 0) {
 537                 dp = ginode(ROOTINO);
 538                 idesc.id_name = lfname;
 539                 idesc.id_type = DATA;
 540                 idesc.id_func = findino;
 541                 idesc.id_number = ROOTINO;
 542                 if ((ckinode(dp, &idesc) & FOUND) != 0) {
 543                         lfdir = idesc.id_parent;
 544                 } else {
 545                         pwarn("NO lost+found DIRECTORY");
 546                         if (preen || reply("CREATE")) {
 547                                 lfdir = allocdir(ROOTINO, (ino_t)0, lfmode);
 548                                 if (lfdir != 0) {
 549                                         if (makeentry(ROOTINO, lfdir, lfname) != 0) {
 550                                                 numdirs++;
 551                                                 if (preen)
 552                                                         printf(" (CREATED)\n");
 553                                         } else {
 554                                                 freedir(lfdir, ROOTINO);
 555                                                 lfdir = 0;
 556                                                 if (preen)
 557                                                         printf("\n");
 558                                         }
 559                                 }
 560                                 if (lfdir != 0) {
 561                                         reparent(lfdir, ROOTINO);
 562                                 }
 563                         }
 564                 }
 565                 if (lfdir == 0) {
 566                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
 567                         markclean = 0;
 568                         return (0);
 569                 }
 570         }
 571         dp = ginode(lfdir);
 572         mode = DIP(dp, mode);
 573         mode = iswap16(mode);
 574         if ((mode & IFMT) != IFDIR) {
 575                 pfatal("lost+found IS NOT A DIRECTORY");
 576                 if (reply("REALLOCATE") == 0) {
 577                         markclean = 0;
 578                         return (0);
 579                 }
 580                 oldlfdir = lfdir;
 581                 lfdir = allocdir(ROOTINO, (ino_t)0, lfmode);
 582                 if (lfdir == 0) {
 583                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
 584                         markclean = 0;
 585                         return (0);
 586                 }
 587                 if ((changeino(ROOTINO, lfname, lfdir) & ALTERED) == 0) {
 588                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
 589                         markclean = 0;
 590                         return (0);
 591                 }
 592                 inodirty();
 593                 reparent(lfdir, ROOTINO);
 594                 idesc.id_type = ADDR;
 595                 idesc.id_func = pass4check;
 596                 idesc.id_number = oldlfdir;
 597                 adjust(&idesc, inoinfo(oldlfdir)->ino_linkcnt + 1);
 598                 inoinfo(oldlfdir)->ino_linkcnt = 0;
 599                 dp = ginode(lfdir);
 600         }
 601         if (inoinfo(lfdir)->ino_state != DFOUND) {
 602                 pfatal("SORRY. NO lost+found DIRECTORY\n\n");
 603                 markclean = 0;
 604                 return (0);
 605         }
 606         (void)lftempname(tempname, orphan);
 607         if (makeentry(lfdir, orphan, (name ? name : tempname)) == 0) {
 608                 pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
 609                 printf("\n\n");
 610                 markclean = 0;
 611                 return (0);
 612         }
 613         inoinfo(orphan)->ino_linkcnt--;
 614         if (lostdir) {
 615                 if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 &&
 616                     parentdir != (ino_t)-1)
 617                         (void)makeentry(orphan, lfdir, "..");
 618                 dp = ginode(lfdir);
 619                 nlink = DIP(dp, nlink);
 620                 DIP_SET(dp, nlink, iswap16(iswap16(nlink) + 1));
 621                 inodirty();
 622                 inoinfo(lfdir)->ino_linkcnt++;
 623                 reparent(orphan, lfdir);
 624                 pwarn("DIR I=%llu CONNECTED. ", (unsigned long long)orphan);
 625                 if (parentdir != (ino_t)-1)
 626                         printf("PARENT WAS I=%llu\n",
 627                             (unsigned long long)parentdir);
 628                 if (preen == 0)
 629                         printf("\n");
 630         }
 631         return (1);
 632 }
 633
 634 /*
 635  * fix an entry in a directory.
 636  */
 637 int
 638 changeino(ino_t dir, const char *name, ino_t newnum)
 639 {
 640         struct inodesc idesc;
 641
 642         memset(&idesc, 0, sizeof(struct inodesc));
 643         idesc.id_type = DATA;
 644         idesc.id_func = chgino;
 645         idesc.id_number = dir;
 646         idesc.id_fix = DONTKNOW;
 647         idesc.id_name = name;
 648         idesc.id_parent = newnum;       /* new value for name */
 649         return (ckinode(ginode(dir), &idesc));
 650 }
 651
 652 /*
 653  * make an entry in a directory
 654  */
 655 int
 656 makeentry(ino_t parent, ino_t ino, const char *name)
 657 {
 658         union dinode *dp;
 659         struct inodesc idesc;
 660         char pathbuf[MAXPATHLEN + 1];
 661
 662         if (parent < ROOTINO || parent >= maxino ||
 663             ino < ROOTINO || ino >= maxino)
 664                 return (0);
 665         memset(&idesc, 0, sizeof(struct inodesc));
 666         idesc.id_type = DATA;
 667         idesc.id_func = mkentry;
 668         idesc.id_number = parent;
 669         idesc.id_parent = ino;  /* this is the inode to enter */
 670         idesc.id_fix = DONTKNOW;
 671         idesc.id_name = name;
 672         dp = ginode(parent);
 673         if (iswap64(DIP(dp, size)) % dirblksiz) {
 674                 DIP_SET(dp, size,
 675                     iswap64(roundup(iswap64(DIP(dp, size)), dirblksiz)));
 676                 inodirty();
 677         }
 678         if ((ckinode(dp, &idesc) & ALTERED) != 0)
 679                 return (1);
 680         getpathname(pathbuf, sizeof(pathbuf), parent, parent);
 681         dp = ginode(parent);
 682         if (expanddir(dp, pathbuf) == 0)
 683                 return (0);
 684         return (ckinode(dp, &idesc) & ALTERED);
 685 }
 686
 687 /*
 688  * Attempt to expand the size of a directory
 689  */
 690 static int
 691 expanddir(union dinode *dp, char *name)
 692 {
 693         daddr_t lastbn, newblk, dirblk;
 694         struct bufarea *bp;
 695         char *cp;
 696 #if DIRBLKSIZ > APPLEUFS_DIRBLKSIZ
 697         char firstblk[DIRBLKSIZ];
 698 #else
 699         char firstblk[APPLEUFS_DIRBLKSIZ];
 700 #endif
 701         struct ufs1_dinode *dp1 = NULL;
 702         struct ufs2_dinode *dp2 = NULL;
 703
 704         if (is_ufs2)
 705                 dp2 = &dp->dp2;
 706         else
 707                 dp1 = &dp->dp1;
 708
 709         lastbn = lblkno(sblock, iswap64(DIP(dp, size)));
 710         if (lastbn >= NDADDR - 1 || DIP(dp, db[lastbn]) == 0 ||
 711             DIP(dp, size) == 0)
 712                 return (0);
 713         if ((newblk = allocblk(sblock->fs_frag)) == 0)
 714                 return (0);
 715         if (is_ufs2) {
 716                 dp2->di_db[lastbn + 1] = dp2->di_db[lastbn];
 717                 dp2->di_db[lastbn] = iswap64(newblk);
 718                 dp2->di_size = iswap64(iswap64(dp2->di_size)+sblock->fs_bsize);
 719                 dp2->di_blocks = iswap64(iswap64(dp2->di_blocks) +
 720                     btodb(sblock->fs_bsize));
 721                 dirblk = iswap64(dp2->di_db[lastbn + 1]);
 722         } else {
 723                 dp1->di_db[lastbn + 1] = dp1->di_db[lastbn];
 724                 dp1->di_db[lastbn] = iswap32((int32_t)newblk);
 725                 dp1->di_size = iswap64(iswap64(dp1->di_size)+sblock->fs_bsize);
 726                 dp1->di_blocks = iswap32(iswap32(dp1->di_blocks) +
 727                     btodb(sblock->fs_bsize));
 728                 dirblk = iswap32(dp1->di_db[lastbn + 1]);
 729         }
 730         bp = getdirblk(dirblk, sblksize(sblock, (daddr_t)DIP(dp, size), lastbn + 1));
 731         if (bp->b_errs)
 732                 goto bad;
 733         memmove(firstblk, bp->b_un.b_buf, dirblksiz);
 734         bp = getdirblk(newblk, sblock->fs_bsize);
 735         if (bp->b_errs)
 736                 goto bad;
 737         memmove(bp->b_un.b_buf, firstblk, dirblksiz);
 738         emptydir.dot_reclen = iswap16(dirblksiz);
 739         for (cp = &bp->b_un.b_buf[dirblksiz];
 740              cp < &bp->b_un.b_buf[sblock->fs_bsize];
 741              cp += dirblksiz)
 742                 memmove(cp, &emptydir, sizeof emptydir);
 743         dirty(bp);
 744         bp = getdirblk(dirblk, sblksize(sblock, (daddr_t)DIP(dp, size), lastbn + 1));
 745         if (bp->b_errs)
 746                 goto bad;
 747         memmove(bp->b_un.b_buf, &emptydir, sizeof emptydir);
 748         pwarn("NO SPACE LEFT IN %s", name);
 749         if (preen)
 750                 printf(" (EXPANDED)\n");
 751         else if (reply("EXPAND") == 0)
 752                 goto bad;
 753         dirty(bp);
 754         inodirty();
 755         return (1);
 756 bad:
 757         if (is_ufs2) {
 758                 dp2->di_db[lastbn] = dp2->di_db[lastbn + 1];
 759                 dp2->di_db[lastbn + 1] = 0;
 760                 dp2->di_size = iswap64(iswap64(dp2->di_size)-sblock->fs_bsize);
 761                 dp2->di_blocks = iswap64(iswap64(dp2->di_blocks) -
 762                     btodb(sblock->fs_bsize));
 763         } else {
 764                 dp1->di_db[lastbn] = dp1->di_db[lastbn + 1];
 765                 dp1->di_db[lastbn + 1] = 0;
 766                 dp1->di_size = iswap64(iswap64(dp1->di_size)-sblock->fs_bsize);
 767                 dp1->di_blocks = iswap32(iswap32(dp1->di_blocks) -
 768                     btodb(sblock->fs_bsize));
 769         }
 770         freeblk(newblk, sblock->fs_frag);
 771         markclean = 0;
 772         return (0);
 773 }
 774
 775 /*
 776  * allocate a new directory
 777  */
 778 ino_t
 779 allocdir(ino_t parent, ino_t request, int mode)
 780 {
 781         ino_t ino;
 782         char *cp;
 783         union dinode *dp;
 784         struct bufarea *bp;
 785         struct inoinfo *inp;
 786         struct dirtemplate *dirp;
 787         daddr_t dirblk;
 788
 789         ino = allocino(request, IFDIR|mode);
 790         if (ino < ROOTINO)
 791                 return 0;
 792         dirhead.dot_reclen = iswap16(12);
 793         dirhead.dotdot_reclen = iswap16(dirblksiz - 12);
 794         odirhead.dot_reclen = iswap16(12);
 795         odirhead.dotdot_reclen = iswap16(dirblksiz - 12);
 796         odirhead.dot_namlen = iswap16(1);
 797         odirhead.dotdot_namlen = iswap16(2);
 798         if (newinofmt)
 799                 dirp = &dirhead;
 800         else
 801                 dirp = (struct dirtemplate *)&odirhead;
 802         dirp->dot_ino = iswap32(ino);
 803         dirp->dotdot_ino = iswap32(parent);
 804         dp = ginode(ino);
 805         dirblk = is_ufs2 ? iswap64(dp->dp2.di_db[0])
 806                     : iswap32(dp->dp1.di_db[0]);
 807         bp = getdirblk(dirblk, sblock->fs_fsize);
 808         if (bp->b_errs) {
 809                 freeino(ino);
 810                 return (0);
 811         }
 812         memmove(bp->b_un.b_buf, dirp, sizeof(struct dirtemplate));
 813         emptydir.dot_reclen = iswap16(dirblksiz);
 814         for (cp = &bp->b_un.b_buf[dirblksiz];
 815              cp < &bp->b_un.b_buf[sblock->fs_fsize];
 816              cp += dirblksiz)
 817                 memmove(cp, &emptydir, sizeof emptydir);
 818         dirty(bp);
 819         DIP_SET(dp, nlink, iswap16(2));
 820         inodirty();
 821         if (ino == ROOTINO) {
 822                 inoinfo(ino)->ino_linkcnt = iswap16(DIP(dp, nlink));
 823                 cacheino(dp, ino);
 824                 return(ino);
 825         }
 826         if (inoinfo(parent)->ino_state != DSTATE &&
 827             inoinfo(parent)->ino_state != DFOUND) {
 828                 freeino(ino);
 829                 return (0);
 830         }
 831         cacheino(dp, ino);
 832         inp = getinoinfo(ino);
 833         inp->i_parent = parent;
 834         inp->i_dotdot = parent;
 835         inoinfo(ino)->ino_state = inoinfo(parent)->ino_state;
 836         if (inoinfo(ino)->ino_state == DSTATE) {
 837                 inoinfo(ino)->ino_linkcnt = iswap16(DIP(dp, nlink));
 838                 inoinfo(parent)->ino_linkcnt++;
 839         }
 840         dp = ginode(parent);
 841         DIP_SET(dp, nlink, iswap16(iswap16(DIP(dp, nlink)) + 1));
 842         inodirty();
 843         return (ino);
 844 }
 845
 846 /*
 847  * free a directory inode
 848  */
 849 static void
 850 freedir(ino_t ino, ino_t parent)
 851 {
 852         union dinode *dp;
 853
 854         if (ino != parent) {
 855                 dp = ginode(parent);
 856                 DIP_SET(dp, nlink, iswap16(iswap16(DIP(dp, nlink)) - 1));
 857                 inodirty();
 858         }
 859         freeino(ino);
 860 }
 861
 862 /*
 863  * generate a temporary name for the lost+found directory.
 864  */
 865 static int
 866 lftempname(char *bufp, ino_t ino)
 867 {
 868         ino_t in;
 869         char *cp;
 870         int namlen;
 871
 872         cp = bufp + 2;
 873         for (in = maxino; in > 0; in /= 10)
 874                 cp++;
 875         *--cp = 0;
 876         namlen = cp - bufp;
 877         in = ino;
 878         while (cp > bufp) {
 879                 *--cp = (in % 10) + '0';
 880                 in /= 10;
 881         }
 882         *cp = '#';
 883         return (namlen);
 884 }
 885
 886 /*
 887  * Get a directory block.
 888  * Insure that it is held until another is requested.
 889  */
 890 static struct bufarea *
 891 getdirblk(daddr_t blkno, long size)
 892 {
 893
 894         if (pdirbp != 0)
 895                 pdirbp->b_flags &= ~B_INUSE;
 896         pdirbp = getdatablk(blkno, size);
 897         return (pdirbp);
 898 }