sbin/fsck/dir.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  * @(#)dir.c    8.8 (Berkeley) 4/28/95
  30  * $FreeBSD: src/sbin/fsck/dir.c,v 1.15 1999/08/28 00:12:45 peter Exp $
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/time.h>
  35
  36 #include <vfs/ufs/dinode.h>
  37 #include <vfs/ufs/dir.h>
  38 #include <vfs/ufs/fs.h>
  39
  40 #include <err.h>
  41 #include <string.h>
  42
  43 #include "fsck.h"
  44
  45 char    *lfname = "lost+found";
  46 int     lfmode = 01777;
  47 struct  dirtemplate emptydir = { 0, DIRBLKSIZ };
  48 struct  dirtemplate dirhead = {
  49         0, 12, DT_DIR, 1, ".",
  50         0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
  51 };
  52 struct  odirtemplate odirhead = {
  53         0, 12, 1, ".",
  54         0, DIRBLKSIZ - 12, 2, ".."
  55 };
  56
  57 static int chgino(struct inodesc *);
  58 static int dircheck(struct inodesc *, struct direct *);
  59 static int expanddir(struct ufs1_dinode *dp, char *name);
  60 static void freedir(ufs1_ino_t ino, ufs1_ino_t parent);
  61 static struct direct *fsck_readdir(struct inodesc *);
  62 static struct bufarea *getdirblk(ufs_daddr_t blkno, long size);
  63 static int lftempname(char *bufp, ufs1_ino_t ino);
  64 static int mkentry(struct inodesc *);
  65
  66 /*
  67  * Propagate connected state through the tree.
  68  */
  69 void
  70 propagate(void)
  71 {
  72         struct inoinfo **inpp, *inp;
  73         struct inoinfo **inpend;
  74         long change;
  75
  76         inpend = &inpsort[inplast];
  77         do {
  78                 change = 0;
  79                 for (inpp = inpsort; inpp < inpend; inpp++) {
  80                         inp = *inpp;
  81                         if (inp->i_parent == 0)
  82                                 continue;
  83                         if (inoinfo(inp->i_parent)->ino_state == DFOUND &&
  84                             inoinfo(inp->i_number)->ino_state == DSTATE) {
  85                                 inoinfo(inp->i_number)->ino_state = DFOUND;
  86                                 change++;
  87                         }
  88                 }
  89         } while (change > 0);
  90 }
  91
  92 /*
  93  * Scan each entry in a directory block.
  94  */
  95 int
  96 dirscan(struct inodesc *idesc)
  97 {
  98         struct direct *dp;
  99         struct bufarea *bp;
 100         unsigned int dsize, n;
 101         long blksiz;
 102         char dbuf[DIRBLKSIZ];
 103
 104         if (idesc->id_type != DATA)
 105                 errx(EEXIT, "wrong type to dirscan %d", idesc->id_type);
 106         if (idesc->id_entryno == 0 &&
 107             (idesc->id_filesize & (DIRBLKSIZ - 1)) != 0)
 108                 idesc->id_filesize = roundup(idesc->id_filesize, DIRBLKSIZ);
 109         blksiz = idesc->id_numfrags * sblock.fs_fsize;
 110         if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
 111                 idesc->id_filesize -= blksiz;
 112                 return (SKIP);
 113         }
 114         idesc->id_loc = 0;
 115         for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
 116                 dsize = dp->d_reclen;
 117                 if (dsize > sizeof(dbuf))
 118                         dsize = sizeof(dbuf);
 119                 memmove(dbuf, dp, (size_t)dsize);
 120 #               if (BYTE_ORDER == LITTLE_ENDIAN)
 121                         if (!newinofmt) {
 122                                 struct direct *tdp = (struct direct *)dbuf;
 123                                 u_char tmp;
 124
 125                                 tmp = tdp->d_namlen;
 126                                 tdp->d_namlen = tdp->d_type;
 127                                 tdp->d_type = tmp;
 128                         }
 129 #               endif
 130                 idesc->id_dirp = (struct direct *)dbuf;
 131                 if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
 132 #                       if (BYTE_ORDER == LITTLE_ENDIAN)
 133                                 if (!newinofmt && !doinglevel2) {
 134                                         struct direct *tdp;
 135                                         u_char tmp;
 136
 137                                         tdp = (struct direct *)dbuf;
 138                                         tmp = tdp->d_namlen;
 139                                         tdp->d_namlen = tdp->d_type;
 140                                         tdp->d_type = tmp;
 141                                 }
 142 #                       endif
 143                         bp = getdirblk(idesc->id_blkno, blksiz);
 144                         memmove(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf,
 145                             (size_t)dsize);
 146                         dirty(bp);
 147                         sbdirty();
 148                 }
 149                 if (n & STOP)
 150                         return (n);
 151         }
 152         return (idesc->id_filesize > 0 ? KEEPON : STOP);
 153 }
 154
 155 /*
 156  * get next entry in a directory.
 157  */
 158 static struct direct *
 159 fsck_readdir(struct inodesc *idesc)
 160 {
 161         struct direct *dp, *ndp;
 162         struct bufarea *bp;
 163         long size, blksiz, fix, dploc;
 164
 165         blksiz = idesc->id_numfrags * sblock.fs_fsize;
 166         bp = getdirblk(idesc->id_blkno, blksiz);
 167         if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 &&
 168             idesc->id_loc < blksiz) {
 169                 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 170                 if (dircheck(idesc, dp))
 171                         goto dpok;
 172                 if (idesc->id_fix == IGNORE)
 173                         return (0);
 174                 fix = dofix(idesc, "DIRECTORY CORRUPTED");
 175                 bp = getdirblk(idesc->id_blkno, blksiz);
 176                 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 177                 dp->d_reclen = DIRBLKSIZ;
 178                 dp->d_ino = 0;
 179                 dp->d_type = 0;
 180                 dp->d_namlen = 0;
 181                 dp->d_name[0] = '\0';
 182                 if (fix)
 183                         dirty(bp);
 184                 idesc->id_loc += DIRBLKSIZ;
 185                 idesc->id_filesize -= DIRBLKSIZ;
 186                 return (dp);
 187         }
 188 dpok:
 189         if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
 190                 return NULL;
 191         dploc = idesc->id_loc;
 192         dp = (struct direct *)(bp->b_un.b_buf + dploc);
 193         idesc->id_loc += dp->d_reclen;
 194         idesc->id_filesize -= dp->d_reclen;
 195         if ((idesc->id_loc % DIRBLKSIZ) == 0)
 196                 return (dp);
 197         ndp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 198         if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
 199             dircheck(idesc, ndp) == 0) {
 200                 size = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
 201                 idesc->id_loc += size;
 202                 idesc->id_filesize -= size;
 203                 if (idesc->id_fix == IGNORE)
 204                         return (0);
 205                 fix = dofix(idesc, "DIRECTORY CORRUPTED");
 206                 bp = getdirblk(idesc->id_blkno, blksiz);
 207                 dp = (struct direct *)(bp->b_un.b_buf + dploc);
 208                 dp->d_reclen += size;
 209                 if (fix)
 210                         dirty(bp);
 211         }
 212         return (dp);
 213 }
 214
 215 /*
 216  * Verify that a directory entry is valid.
 217  * This is a superset of the checks made in the kernel.
 218  */
 219 static int
 220 dircheck(struct inodesc *idesc, struct direct *dp)
 221 {
 222         int size;
 223         char *cp;
 224         u_char namlen, type;
 225         int spaceleft;
 226
 227         spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
 228         if (dp->d_reclen == 0 ||
 229             dp->d_reclen > spaceleft ||
 230             (dp->d_reclen & 0x3) != 0)
 231                 return (0);
 232         if (dp->d_ino == 0)
 233                 return (1);
 234         size = DIRSIZ(!newinofmt, dp);
 235 #       if (BYTE_ORDER == LITTLE_ENDIAN)
 236                 if (!newinofmt) {
 237                         type = dp->d_namlen;
 238                         namlen = dp->d_type;
 239                 } else {
 240                         namlen = dp->d_namlen;
 241                         type = dp->d_type;
 242                 }
 243 #       else
 244                 namlen = dp->d_namlen;
 245                 type = dp->d_type;
 246 #       endif
 247         if (dp->d_reclen < size ||
 248             idesc->id_filesize < size ||
 249             type > 15)
 250                 return (0);
 251         for (cp = dp->d_name, size = 0; size < namlen; size++)
 252                 if (*cp == '\0' || (*cp++ == '/'))
 253                         return (0);
 254         if (*cp != '\0')
 255                 return (0);
 256         return (1);
 257 }
 258
 259 void
 260 direrror(ufs1_ino_t ino, char *errmesg)
 261 {
 262
 263         fileerror(ino, ino, errmesg);
 264 }
 265
 266 void
 267 fileerror(ufs1_ino_t cwd, ufs1_ino_t ino, char *errmesg)
 268 {
 269         struct ufs1_dinode *dp;
 270         char pathbuf[MAXPATHLEN + 1];
 271
 272         pwarn("%s ", errmesg);
 273         pinode(ino);
 274         printf("\n");
 275         getpathname(pathbuf, cwd, ino);
 276         if (ino < ROOTINO || ino > maxino) {
 277                 pfatal("NAME=%s\n", pathbuf);
 278                 return;
 279         }
 280         dp = ginode(ino);
 281         if (ftypeok(dp))
 282                 pfatal("%s=%s\n",
 283                     (dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf);
 284         else
 285                 pfatal("NAME=%s\n", pathbuf);
 286 }
 287
 288 void
 289 adjust(struct inodesc *idesc, int lcnt)
 290 {
 291         struct ufs1_dinode *dp;
 292         int saveresolved;
 293
 294         dp = ginode(idesc->id_number);
 295         if (dp->di_nlink == lcnt) {
 296                 /*
 297                  * If we have not hit any unresolved problems, are running
 298                  * in preen mode, and are on a filesystem using soft updates,
 299                  * then just toss any partially allocated files.
 300                  */
 301                 if (resolved && preen && usedsoftdep) {
 302                         clri(idesc, "UNREF", 1);
 303                         return;
 304                 } else {
 305                         /*
 306                          * The filesystem can be marked clean even if
 307                          * a file is not linked up, but is cleared.
 308                          * Hence, resolved should not be cleared when
 309                          * linkup is answered no, but clri is answered yes.
 310                          */
 311                         saveresolved = resolved;
 312                         if (linkup(idesc->id_number, (ufs1_ino_t)0, NULL) == 0) {
 313                                 resolved = saveresolved;
 314                                 clri(idesc, "UNREF", 0);
 315                                 return;
 316                         }
 317                         /*
 318                          * Account for the new reference created by linkup().
 319                          */
 320                         dp = ginode(idesc->id_number);
 321                         lcnt--;
 322                 }
 323         }
 324         if (lcnt != 0) {
 325                 pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
 326                         ((dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE"));
 327                 pinode(idesc->id_number);
 328                 printf(" COUNT %d SHOULD BE %d",
 329                         dp->di_nlink, dp->di_nlink - lcnt);
 330                 if (preen || usedsoftdep) {
 331                         if (lcnt < 0) {
 332                                 printf("\n");
 333                                 pfatal("LINK COUNT INCREASING");
 334                         }
 335                         if (preen)
 336                                 printf(" (ADJUSTED)\n");
 337                 }
 338                 if (preen || reply("ADJUST") == 1) {
 339                         dp->di_nlink -= lcnt;
 340                         inodirty();
 341                 }
 342         }
 343 }
 344
 345 static int
 346 mkentry(struct inodesc *idesc)
 347 {
 348         struct direct *dirp = idesc->id_dirp;
 349         struct direct newent;
 350         int newlen, oldlen;
 351
 352         newent.d_namlen = strlen(idesc->id_name);
 353         newlen = DIRSIZ(0, &newent);
 354         if (dirp->d_ino != 0)
 355                 oldlen = DIRSIZ(0, dirp);
 356         else
 357                 oldlen = 0;
 358         if (dirp->d_reclen - oldlen < newlen)
 359                 return (KEEPON);
 360         newent.d_reclen = dirp->d_reclen - oldlen;
 361         dirp->d_reclen = oldlen;
 362         dirp = (struct direct *)(((char *)dirp) + oldlen);
 363         dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */
 364         dirp->d_reclen = newent.d_reclen;
 365         if (newinofmt)
 366                 dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
 367         else
 368                 dirp->d_type = 0;
 369         dirp->d_namlen = newent.d_namlen;
 370         memmove(dirp->d_name, idesc->id_name, (size_t)newent.d_namlen + 1);
 371 #       if (BYTE_ORDER == LITTLE_ENDIAN)
 372                 /*
 373                  * If the entry was split, dirscan() will only reverse the byte
 374                  * order of the original entry, and not the new one, before
 375                  * writing it back out.  So, we reverse the byte order here if
 376                  * necessary.
 377                  */
 378                 if (oldlen != 0 && !newinofmt && !doinglevel2) {
 379                         u_char tmp;
 380
 381                         tmp = dirp->d_namlen;
 382                         dirp->d_namlen = dirp->d_type;
 383                         dirp->d_type = tmp;
 384                 }
 385 #       endif
 386         return (ALTERED|STOP);
 387 }
 388
 389 static int
 390 chgino(struct inodesc *idesc)
 391 {
 392         struct direct *dirp = idesc->id_dirp;
 393
 394         if (memcmp(dirp->d_name, idesc->id_name, (int)dirp->d_namlen + 1))
 395                 return (KEEPON);
 396         dirp->d_ino = idesc->id_parent;
 397         if (newinofmt)
 398                 dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
 399         else
 400                 dirp->d_type = 0;
 401         return (ALTERED|STOP);
 402 }
 403
 404 int
 405 linkup(ufs1_ino_t orphan, ufs1_ino_t parentdir, char *name)
 406 {
 407         struct ufs1_dinode *dp;
 408         int lostdir;
 409         ufs1_ino_t oldlfdir;
 410         struct inodesc idesc;
 411         char tempname[BUFSIZ];
 412
 413         memset(&idesc, 0, sizeof(struct inodesc));
 414         dp = ginode(orphan);
 415         lostdir = (dp->di_mode & IFMT) == IFDIR;
 416         pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
 417         pinode(orphan);
 418         if (preen && dp->di_size == 0)
 419                 return (0);
 420         if (preen)
 421                 printf(" (RECONNECTED)\n");
 422         else
 423                 if (reply("RECONNECT") == 0)
 424                         return (0);
 425         if (lfdir == 0) {
 426                 dp = ginode(ROOTINO);
 427                 idesc.id_name = lfname;
 428                 idesc.id_type = DATA;
 429                 idesc.id_func = findino;
 430                 idesc.id_number = ROOTINO;
 431                 if ((ckinode(dp, &idesc) & FOUND) != 0) {
 432                         lfdir = idesc.id_parent;
 433                 } else {
 434                         pwarn("NO lost+found DIRECTORY");
 435                         if (preen || reply("CREATE")) {
 436                                 lfdir = allocdir(ROOTINO, (ufs1_ino_t)0, lfmode);
 437                                 if (lfdir != 0) {
 438                                         if (makeentry(ROOTINO, lfdir, lfname) != 0) {
 439                                                 numdirs++;
 440                                                 if (preen)
 441                                                         printf(" (CREATED)\n");
 442                                         } else {
 443                                                 freedir(lfdir, ROOTINO);
 444                                                 lfdir = 0;
 445                                                 if (preen)
 446                                                         printf("\n");
 447                                         }
 448                                 }
 449                         }
 450                 }
 451                 if (lfdir == 0) {
 452                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY");
 453                         printf("\n\n");
 454                         return (0);
 455                 }
 456         }
 457         dp = ginode(lfdir);
 458         if ((dp->di_mode & IFMT) != IFDIR) {
 459                 pfatal("lost+found IS NOT A DIRECTORY");
 460                 if (reply("REALLOCATE") == 0)
 461                         return (0);
 462                 oldlfdir = lfdir;
 463                 if ((lfdir = allocdir(ROOTINO, (ufs1_ino_t)0, lfmode)) == 0) {
 464                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
 465                         return (0);
 466                 }
 467                 if ((changeino(ROOTINO, lfname, lfdir) & ALTERED) == 0) {
 468                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
 469                         return (0);
 470                 }
 471                 inodirty();
 472                 idesc.id_type = ADDR;
 473                 idesc.id_func = pass4check;
 474                 idesc.id_number = oldlfdir;
 475                 adjust(&idesc, inoinfo(oldlfdir)->ino_linkcnt + 1);
 476                 inoinfo(oldlfdir)->ino_linkcnt = 0;
 477                 dp = ginode(lfdir);
 478         }
 479         if (inoinfo(lfdir)->ino_state != DFOUND) {
 480                 pfatal("SORRY. NO lost+found DIRECTORY\n\n");
 481                 return (0);
 482         }
 483         lftempname(tempname, orphan);
 484         if (makeentry(lfdir, orphan, (name ? name : tempname)) == 0) {
 485                 pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
 486                 printf("\n\n");
 487                 return (0);
 488         }
 489         inoinfo(orphan)->ino_linkcnt--;
 490         if (lostdir) {
 491                 if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 &&
 492                     parentdir != (ufs1_ino_t)-1)
 493                         makeentry(orphan, lfdir, "..");
 494                 dp = ginode(lfdir);
 495                 dp->di_nlink++;
 496                 inodirty();
 497                 inoinfo(lfdir)->ino_linkcnt++;
 498                 pwarn("DIR I=%u CONNECTED. ", orphan);
 499                 if (parentdir != (ufs1_ino_t)-1) {
 500                         printf("PARENT WAS I=%lu\n", (u_long)parentdir);
 501                         /*
 502                          * The parent directory, because of the ordering
 503                          * guarantees, has had the link count incremented
 504                          * for the child, but no entry was made.  This
 505                          * fixes the parent link count so that fsck does
 506                          * not need to be rerun.
 507                          */
 508                         inoinfo(parentdir)->ino_linkcnt++;
 509                 }
 510                 if (preen == 0)
 511                         printf("\n");
 512         }
 513         return (1);
 514 }
 515
 516 /*
 517  * fix an entry in a directory.
 518  */
 519 int
 520 changeino(ufs1_ino_t dir, char *name, ufs1_ino_t newnum)
 521 {
 522         struct inodesc idesc;
 523
 524         memset(&idesc, 0, sizeof(struct inodesc));
 525         idesc.id_type = DATA;
 526         idesc.id_func = chgino;
 527         idesc.id_number = dir;
 528         idesc.id_fix = DONTKNOW;
 529         idesc.id_name = name;
 530         idesc.id_parent = newnum;       /* new value for name */
 531         return (ckinode(ginode(dir), &idesc));
 532 }
 533
 534 /*
 535  * make an entry in a directory
 536  */
 537 int
 538 makeentry(ufs1_ino_t parent, ufs1_ino_t ino, char *name)
 539 {
 540         struct ufs1_dinode *dp;
 541         struct inodesc idesc;
 542         char pathbuf[MAXPATHLEN + 1];
 543
 544         if (parent < ROOTINO || parent >= maxino ||
 545             ino < ROOTINO || ino >= maxino)
 546                 return (0);
 547         memset(&idesc, 0, sizeof(struct inodesc));
 548         idesc.id_type = DATA;
 549         idesc.id_func = mkentry;
 550         idesc.id_number = parent;
 551         idesc.id_parent = ino;  /* this is the inode to enter */
 552         idesc.id_fix = DONTKNOW;
 553         idesc.id_name = name;
 554         dp = ginode(parent);
 555         if (dp->di_size % DIRBLKSIZ) {
 556                 dp->di_size = roundup(dp->di_size, DIRBLKSIZ);
 557                 inodirty();
 558         }
 559         if ((ckinode(dp, &idesc) & ALTERED) != 0)
 560                 return (1);
 561         getpathname(pathbuf, parent, parent);
 562         dp = ginode(parent);
 563         if (expanddir(dp, pathbuf) == 0)
 564                 return (0);
 565         return (ckinode(dp, &idesc) & ALTERED);
 566 }
 567
 568 /*
 569  * Attempt to expand the size of a directory
 570  */
 571 static int
 572 expanddir(struct ufs1_dinode *dp, char *name)
 573 {
 574         ufs_daddr_t lastbn, newblk;
 575         struct bufarea *bp;
 576         char *cp, firstblk[DIRBLKSIZ];
 577
 578         lastbn = lblkno(&sblock, dp->di_size);
 579         if (lastbn >= NDADDR - 1 || dp->di_db[lastbn] == 0 || dp->di_size == 0)
 580                 return (0);
 581         if ((newblk = allocblk(sblock.fs_frag)) == 0)
 582                 return (0);
 583         dp->di_db[lastbn + 1] = dp->di_db[lastbn];
 584         dp->di_db[lastbn] = newblk;
 585         dp->di_size += sblock.fs_bsize;
 586         dp->di_blocks += btodb(sblock.fs_bsize);
 587         bp = getdirblk(dp->di_db[lastbn + 1],
 588                 (long)dblksize(&sblock, dp, lastbn + 1));
 589         if (bp->b_errs)
 590                 goto bad;
 591         memmove(firstblk, bp->b_un.b_buf, DIRBLKSIZ);
 592         bp = getdirblk(newblk, sblock.fs_bsize);
 593         if (bp->b_errs)
 594                 goto bad;
 595         memmove(bp->b_un.b_buf, firstblk, DIRBLKSIZ);
 596         for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
 597              cp < &bp->b_un.b_buf[sblock.fs_bsize];
 598              cp += DIRBLKSIZ)
 599                 memmove(cp, &emptydir, sizeof emptydir);
 600         dirty(bp);
 601         bp = getdirblk(dp->di_db[lastbn + 1],
 602                 (long)dblksize(&sblock, dp, lastbn + 1));
 603         if (bp->b_errs)
 604                 goto bad;
 605         memmove(bp->b_un.b_buf, &emptydir, sizeof emptydir);
 606         pwarn("NO SPACE LEFT IN %s", name);
 607         if (preen)
 608                 printf(" (EXPANDED)\n");
 609         else if (reply("EXPAND") == 0)
 610                 goto bad;
 611         dirty(bp);
 612         inodirty();
 613         return (1);
 614 bad:
 615         dp->di_db[lastbn] = dp->di_db[lastbn + 1];
 616         dp->di_db[lastbn + 1] = 0;
 617         dp->di_size -= sblock.fs_bsize;
 618         dp->di_blocks -= btodb(sblock.fs_bsize);
 619         freeblk(newblk, sblock.fs_frag);
 620         return (0);
 621 }
 622
 623 /*
 624  * allocate a new directory
 625  */
 626 ufs1_ino_t
 627 allocdir(ufs1_ino_t parent, ufs1_ino_t request, int mode)
 628 {
 629         ufs1_ino_t ino;
 630         char *cp;
 631         struct ufs1_dinode *dp;
 632         struct bufarea *bp;
 633         struct dirtemplate *dirp;
 634
 635         ino = allocino(request, IFDIR|mode);
 636         if (newinofmt)
 637                 dirp = &dirhead;
 638         else
 639                 dirp = (struct dirtemplate *)&odirhead;
 640         dirp->dot_ino = ino;
 641         dirp->dotdot_ino = parent;
 642         dp = ginode(ino);
 643         bp = getdirblk(dp->di_db[0], sblock.fs_fsize);
 644         if (bp->b_errs) {
 645                 freeino(ino);
 646                 return (0);
 647         }
 648         memmove(bp->b_un.b_buf, dirp, sizeof(struct dirtemplate));
 649         for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
 650              cp < &bp->b_un.b_buf[sblock.fs_fsize];
 651              cp += DIRBLKSIZ)
 652                 memmove(cp, &emptydir, sizeof emptydir);
 653         dirty(bp);
 654         dp->di_nlink = 2;
 655         inodirty();
 656         if (ino == ROOTINO) {
 657                 inoinfo(ino)->ino_linkcnt = dp->di_nlink;
 658                 cacheino(dp, ino);
 659                 return(ino);
 660         }
 661         if (inoinfo(parent)->ino_state != DSTATE &&
 662             inoinfo(parent)->ino_state != DFOUND) {
 663                 freeino(ino);
 664                 return (0);
 665         }
 666         cacheino(dp, ino);
 667         inoinfo(ino)->ino_state = inoinfo(parent)->ino_state;
 668         if (inoinfo(ino)->ino_state == DSTATE) {
 669                 inoinfo(ino)->ino_linkcnt = dp->di_nlink;
 670                 inoinfo(parent)->ino_linkcnt++;
 671         }
 672         dp = ginode(parent);
 673         dp->di_nlink++;
 674         inodirty();
 675         return (ino);
 676 }
 677
 678 /*
 679  * free a directory inode
 680  */
 681 static void
 682 freedir(ufs1_ino_t ino, ufs1_ino_t parent)
 683 {
 684         struct ufs1_dinode *dp;
 685
 686         if (ino != parent) {
 687                 dp = ginode(parent);
 688                 dp->di_nlink--;
 689                 inodirty();
 690         }
 691         freeino(ino);
 692 }
 693
 694 /*
 695  * generate a temporary name for the lost+found directory.
 696  */
 697 static int
 698 lftempname(char *bufp, ufs1_ino_t ino)
 699 {
 700         ufs1_ino_t in;
 701         char *cp;
 702         int namlen;
 703
 704         cp = bufp + 2;
 705         for (in = maxino; in > 0; in /= 10)
 706                 cp++;
 707         *--cp = 0;
 708         namlen = cp - bufp;
 709         in = ino;
 710         while (cp > bufp) {
 711                 *--cp = (in % 10) + '0';
 712                 in /= 10;
 713         }
 714         *cp = '#';
 715         return (namlen);
 716 }
 717
 718 /*
 719  * Get a directory block.
 720  * Insure that it is held until another is requested.
 721  */
 722 static struct bufarea *
 723 getdirblk(ufs_daddr_t blkno, long size)
 724 {
 725
 726         if (pdirbp != 0)
 727                 pdirbp->b_flags &= ~B_INUSE;
 728         pdirbp = getdatablk(blkno, size);
 729         return (pdirbp);
 730 }