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 struct bufarea *pdirbp;         /* current directory contents */
  46 ufs1_ino_t      lfdir;                  /* lost & found directory inode number */
  47
  48 char    *lfname = "lost+found";
  49 int     lfmode = 01777;
  50 struct  dirtemplate emptydir = { 0, DIRBLKSIZ };
  51 struct  dirtemplate dirhead = {
  52         0, 12, DT_DIR, 1, ".",
  53         0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
  54 };
  55 struct  odirtemplate odirhead = {
  56         0, 12, 1, ".",
  57         0, DIRBLKSIZ - 12, 2, ".."
  58 };
  59
  60 static int chgino(struct inodesc *);
  61 static int dircheck(struct inodesc *, struct direct *);
  62 static int expanddir(struct ufs1_dinode *dp, char *name);
  63 static void freedir(ufs1_ino_t ino, ufs1_ino_t parent);
  64 static struct direct *fsck_readdir(struct inodesc *);
  65 static struct bufarea *getdirblk(ufs_daddr_t blkno, long size);
  66 static int lftempname(char *bufp, ufs1_ino_t ino);
  67 static int mkentry(struct inodesc *);
  68
  69 /*
  70  * Propagate connected state through the tree.
  71  */
  72 void
  73 propagate(void)
  74 {
  75         struct inoinfo **inpp, *inp;
  76         struct inoinfo **inpend;
  77         long change;
  78
  79         inpend = &inpsort[inplast];
  80         do {
  81                 change = 0;
  82                 for (inpp = inpsort; inpp < inpend; inpp++) {
  83                         inp = *inpp;
  84                         if (inp->i_parent == 0)
  85                                 continue;
  86                         if (inoinfo(inp->i_parent)->ino_state == DFOUND &&
  87                             inoinfo(inp->i_number)->ino_state == DSTATE) {
  88                                 inoinfo(inp->i_number)->ino_state = DFOUND;
  89                                 change++;
  90                         }
  91                 }
  92         } while (change > 0);
  93 }
  94
  95 /*
  96  * Scan each entry in a directory block.
  97  */
  98 int
  99 dirscan(struct inodesc *idesc)
 100 {
 101         struct direct *dp;
 102         struct bufarea *bp;
 103         unsigned int dsize, n;
 104         long blksiz;
 105         char dbuf[DIRBLKSIZ];
 106
 107         if (idesc->id_type != DATA)
 108                 errx(EEXIT, "wrong type to dirscan %d", idesc->id_type);
 109         if (idesc->id_entryno == 0 &&
 110             (idesc->id_filesize & (DIRBLKSIZ - 1)) != 0)
 111                 idesc->id_filesize = roundup(idesc->id_filesize, DIRBLKSIZ);
 112         blksiz = idesc->id_numfrags * sblock.fs_fsize;
 113         if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
 114                 idesc->id_filesize -= blksiz;
 115                 return (SKIP);
 116         }
 117         idesc->id_loc = 0;
 118         for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
 119                 dsize = dp->d_reclen;
 120                 if (dsize > sizeof(dbuf))
 121                         dsize = sizeof(dbuf);
 122                 memmove(dbuf, dp, (size_t)dsize);
 123 #               if (BYTE_ORDER == LITTLE_ENDIAN)
 124                         if (!newinofmt) {
 125                                 struct direct *tdp = (struct direct *)dbuf;
 126                                 u_char tmp;
 127
 128                                 tmp = tdp->d_namlen;
 129                                 tdp->d_namlen = tdp->d_type;
 130                                 tdp->d_type = tmp;
 131                         }
 132 #               endif
 133                 idesc->id_dirp = (struct direct *)dbuf;
 134                 if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
 135 #                       if (BYTE_ORDER == LITTLE_ENDIAN)
 136                                 if (!newinofmt && !doinglevel2) {
 137                                         struct direct *tdp;
 138                                         u_char tmp;
 139
 140                                         tdp = (struct direct *)dbuf;
 141                                         tmp = tdp->d_namlen;
 142                                         tdp->d_namlen = tdp->d_type;
 143                                         tdp->d_type = tmp;
 144                                 }
 145 #                       endif
 146                         bp = getdirblk(idesc->id_blkno, blksiz);
 147                         memmove(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf,
 148                             (size_t)dsize);
 149                         dirty(bp);
 150                         sbdirty();
 151                 }
 152                 if (n & STOP)
 153                         return (n);
 154         }
 155         return (idesc->id_filesize > 0 ? KEEPON : STOP);
 156 }
 157
 158 /*
 159  * get next entry in a directory.
 160  */
 161 static struct direct *
 162 fsck_readdir(struct inodesc *idesc)
 163 {
 164         struct direct *dp, *ndp;
 165         struct bufarea *bp;
 166         long size, blksiz, fix, dploc;
 167
 168         blksiz = idesc->id_numfrags * sblock.fs_fsize;
 169         bp = getdirblk(idesc->id_blkno, blksiz);
 170         if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 &&
 171             idesc->id_loc < blksiz) {
 172                 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 173                 if (dircheck(idesc, dp))
 174                         goto dpok;
 175                 if (idesc->id_fix == IGNORE)
 176                         return (0);
 177                 fix = dofix(idesc, "DIRECTORY CORRUPTED");
 178                 bp = getdirblk(idesc->id_blkno, blksiz);
 179                 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 180                 dp->d_reclen = DIRBLKSIZ;
 181                 dp->d_ino = 0;
 182                 dp->d_type = 0;
 183                 dp->d_namlen = 0;
 184                 dp->d_name[0] = '\0';
 185                 if (fix)
 186                         dirty(bp);
 187                 idesc->id_loc += DIRBLKSIZ;
 188                 idesc->id_filesize -= DIRBLKSIZ;
 189                 return (dp);
 190         }
 191 dpok:
 192         if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
 193                 return NULL;
 194         dploc = idesc->id_loc;
 195         dp = (struct direct *)(bp->b_un.b_buf + dploc);
 196         idesc->id_loc += dp->d_reclen;
 197         idesc->id_filesize -= dp->d_reclen;
 198         if ((idesc->id_loc % DIRBLKSIZ) == 0)
 199                 return (dp);
 200         ndp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
 201         if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
 202             dircheck(idesc, ndp) == 0) {
 203                 size = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
 204                 idesc->id_loc += size;
 205                 idesc->id_filesize -= size;
 206                 if (idesc->id_fix == IGNORE)
 207                         return (0);
 208                 fix = dofix(idesc, "DIRECTORY CORRUPTED");
 209                 bp = getdirblk(idesc->id_blkno, blksiz);
 210                 dp = (struct direct *)(bp->b_un.b_buf + dploc);
 211                 dp->d_reclen += size;
 212                 if (fix)
 213                         dirty(bp);
 214         }
 215         return (dp);
 216 }
 217
 218 /*
 219  * Verify that a directory entry is valid.
 220  * This is a superset of the checks made in the kernel.
 221  */
 222 static int
 223 dircheck(struct inodesc *idesc, struct direct *dp)
 224 {
 225         int size;
 226         char *cp;
 227         u_char namlen, type;
 228         int spaceleft;
 229
 230         spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
 231         if (dp->d_reclen == 0 ||
 232             dp->d_reclen > spaceleft ||
 233             (dp->d_reclen & 0x3) != 0)
 234                 return (0);
 235         if (dp->d_ino == 0)
 236                 return (1);
 237         size = DIRSIZ(!newinofmt, dp);
 238 #       if (BYTE_ORDER == LITTLE_ENDIAN)
 239                 if (!newinofmt) {
 240                         type = dp->d_namlen;
 241                         namlen = dp->d_type;
 242                 } else {
 243                         namlen = dp->d_namlen;
 244                         type = dp->d_type;
 245                 }
 246 #       else
 247                 namlen = dp->d_namlen;
 248                 type = dp->d_type;
 249 #       endif
 250         if (dp->d_reclen < size ||
 251             idesc->id_filesize < size ||
 252             type > 15)
 253                 return (0);
 254         for (cp = dp->d_name, size = 0; size < namlen; size++)
 255                 if (*cp == '\0' || (*cp++ == '/'))
 256                         return (0);
 257         if (*cp != '\0')
 258                 return (0);
 259         return (1);
 260 }
 261
 262 void
 263 direrror(ufs1_ino_t ino, char *errmesg)
 264 {
 265
 266         fileerror(ino, ino, errmesg);
 267 }
 268
 269 void
 270 fileerror(ufs1_ino_t cwd, ufs1_ino_t ino, char *errmesg)
 271 {
 272         struct ufs1_dinode *dp;
 273         char pathbuf[MAXPATHLEN + 1];
 274
 275         pwarn("%s ", errmesg);
 276         pinode(ino);
 277         printf("\n");
 278         getpathname(pathbuf, cwd, ino);
 279         if (ino < UFS_ROOTINO || ino > maxino) {
 280                 pfatal("NAME=%s\n", pathbuf);
 281                 return;
 282         }
 283         dp = ginode(ino);
 284         if (ftypeok(dp))
 285                 pfatal("%s=%s\n",
 286                     (dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf);
 287         else
 288                 pfatal("NAME=%s\n", pathbuf);
 289 }
 290
 291 void
 292 adjust(struct inodesc *idesc, int lcnt)
 293 {
 294         struct ufs1_dinode *dp;
 295         int saveresolved;
 296
 297         dp = ginode(idesc->id_number);
 298         if (dp->di_nlink == lcnt) {
 299                 /*
 300                  * If we have not hit any unresolved problems, are running
 301                  * in preen mode, and are on a filesystem using soft updates,
 302                  * then just toss any partially allocated files.
 303                  */
 304                 if (resolved && preen && usedsoftdep) {
 305                         clri(idesc, "UNREF", 1);
 306                         return;
 307                 } else {
 308                         /*
 309                          * The filesystem can be marked clean even if
 310                          * a file is not linked up, but is cleared.
 311                          * Hence, resolved should not be cleared when
 312                          * linkup is answered no, but clri is answered yes.
 313                          */
 314                         saveresolved = resolved;
 315                         if (linkup(idesc->id_number, (ufs1_ino_t)0, NULL) == 0) {
 316                                 resolved = saveresolved;
 317                                 clri(idesc, "UNREF", 0);
 318                                 return;
 319                         }
 320                         /*
 321                          * Account for the new reference created by linkup().
 322                          */
 323                         dp = ginode(idesc->id_number);
 324                         lcnt--;
 325                 }
 326         }
 327         if (lcnt != 0) {
 328                 pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
 329                         ((dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE"));
 330                 pinode(idesc->id_number);
 331                 printf(" COUNT %d SHOULD BE %d",
 332                         dp->di_nlink, dp->di_nlink - lcnt);
 333                 if (preen || usedsoftdep) {
 334                         if (lcnt < 0) {
 335                                 printf("\n");
 336                                 pfatal("LINK COUNT INCREASING");
 337                         }
 338                         if (preen)
 339                                 printf(" (ADJUSTED)\n");
 340                 }
 341                 if (preen || reply("ADJUST") == 1) {
 342                         dp->di_nlink -= lcnt;
 343                         inodirty();
 344                 }
 345         }
 346 }
 347
 348 static int
 349 mkentry(struct inodesc *idesc)
 350 {
 351         struct direct *dirp = idesc->id_dirp;
 352         struct direct newent;
 353         int newlen, oldlen;
 354
 355         newent.d_namlen = strlen(idesc->id_name);
 356         newlen = DIRSIZ(0, &newent);
 357         if (dirp->d_ino != 0)
 358                 oldlen = DIRSIZ(0, dirp);
 359         else
 360                 oldlen = 0;
 361         if (dirp->d_reclen - oldlen < newlen)
 362                 return (KEEPON);
 363         newent.d_reclen = dirp->d_reclen - oldlen;
 364         dirp->d_reclen = oldlen;
 365         dirp = (struct direct *)(((char *)dirp) + oldlen);
 366         dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */
 367         dirp->d_reclen = newent.d_reclen;
 368         if (newinofmt)
 369                 dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
 370         else
 371                 dirp->d_type = 0;
 372         dirp->d_namlen = newent.d_namlen;
 373         memmove(dirp->d_name, idesc->id_name, (size_t)newent.d_namlen + 1);
 374 #       if (BYTE_ORDER == LITTLE_ENDIAN)
 375                 /*
 376                  * If the entry was split, dirscan() will only reverse the byte
 377                  * order of the original entry, and not the new one, before
 378                  * writing it back out.  So, we reverse the byte order here if
 379                  * necessary.
 380                  */
 381                 if (oldlen != 0 && !newinofmt && !doinglevel2) {
 382                         u_char tmp;
 383
 384                         tmp = dirp->d_namlen;
 385                         dirp->d_namlen = dirp->d_type;
 386                         dirp->d_type = tmp;
 387                 }
 388 #       endif
 389         return (ALTERED|STOP);
 390 }
 391
 392 static int
 393 chgino(struct inodesc *idesc)
 394 {
 395         struct direct *dirp = idesc->id_dirp;
 396
 397         if (memcmp(dirp->d_name, idesc->id_name, (int)dirp->d_namlen + 1))
 398                 return (KEEPON);
 399         dirp->d_ino = idesc->id_parent;
 400         if (newinofmt)
 401                 dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
 402         else
 403                 dirp->d_type = 0;
 404         return (ALTERED|STOP);
 405 }
 406
 407 int
 408 linkup(ufs1_ino_t orphan, ufs1_ino_t parentdir, char *name)
 409 {
 410         struct ufs1_dinode *dp;
 411         int lostdir;
 412         ufs1_ino_t oldlfdir;
 413         struct inodesc idesc;
 414         char tempname[BUFSIZ];
 415
 416         memset(&idesc, 0, sizeof(struct inodesc));
 417         dp = ginode(orphan);
 418         lostdir = (dp->di_mode & IFMT) == IFDIR;
 419         pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
 420         pinode(orphan);
 421         if (preen && dp->di_size == 0)
 422                 return (0);
 423         if (preen)
 424                 printf(" (RECONNECTED)\n");
 425         else
 426                 if (reply("RECONNECT") == 0)
 427                         return (0);
 428         if (lfdir == 0) {
 429                 dp = ginode(UFS_ROOTINO);
 430                 idesc.id_name = lfname;
 431                 idesc.id_type = DATA;
 432                 idesc.id_func = findino;
 433                 idesc.id_number = UFS_ROOTINO;
 434                 if ((ckinode(dp, &idesc) & FOUND) != 0) {
 435                         lfdir = idesc.id_parent;
 436                 } else {
 437                         pwarn("NO lost+found DIRECTORY");
 438                         if (preen || reply("CREATE")) {
 439                                 lfdir = allocdir(UFS_ROOTINO, (ufs1_ino_t)0,
 440                                     lfmode);
 441                                 if (lfdir != 0) {
 442                                         if (makeentry(UFS_ROOTINO, lfdir, lfname) != 0) {
 443                                                 numdirs++;
 444                                                 if (preen)
 445                                                         printf(" (CREATED)\n");
 446                                         } else {
 447                                                 freedir(lfdir, UFS_ROOTINO);
 448                                                 lfdir = 0;
 449                                                 if (preen)
 450                                                         printf("\n");
 451                                         }
 452                                 }
 453                         }
 454                 }
 455                 if (lfdir == 0) {
 456                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY");
 457                         printf("\n\n");
 458                         return (0);
 459                 }
 460         }
 461         dp = ginode(lfdir);
 462         if ((dp->di_mode & IFMT) != IFDIR) {
 463                 pfatal("lost+found IS NOT A DIRECTORY");
 464                 if (reply("REALLOCATE") == 0)
 465                         return (0);
 466                 oldlfdir = lfdir;
 467                 if ((lfdir = allocdir(UFS_ROOTINO, (ufs1_ino_t)0, lfmode)) == 0) {
 468                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
 469                         return (0);
 470                 }
 471                 if ((changeino(UFS_ROOTINO, lfname, lfdir) & ALTERED) == 0) {
 472                         pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
 473                         return (0);
 474                 }
 475                 inodirty();
 476                 idesc.id_type = ADDR;
 477                 idesc.id_func = pass4check;
 478                 idesc.id_number = oldlfdir;
 479                 adjust(&idesc, inoinfo(oldlfdir)->ino_linkcnt + 1);
 480                 inoinfo(oldlfdir)->ino_linkcnt = 0;
 481                 dp = ginode(lfdir);
 482         }
 483         if (inoinfo(lfdir)->ino_state != DFOUND) {
 484                 pfatal("SORRY. NO lost+found DIRECTORY\n\n");
 485                 return (0);
 486         }
 487         lftempname(tempname, orphan);
 488         if (makeentry(lfdir, orphan, (name ? name : tempname)) == 0) {
 489                 pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
 490                 printf("\n\n");
 491                 return (0);
 492         }
 493         inoinfo(orphan)->ino_linkcnt--;
 494         if (lostdir) {
 495                 if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 &&
 496                     parentdir != (ufs1_ino_t)-1)
 497                         makeentry(orphan, lfdir, "..");
 498                 dp = ginode(lfdir);
 499                 dp->di_nlink++;
 500                 inodirty();
 501                 inoinfo(lfdir)->ino_linkcnt++;
 502                 pwarn("DIR I=%u CONNECTED. ", orphan);
 503                 if (parentdir != (ufs1_ino_t)-1) {
 504                         printf("PARENT WAS I=%lu\n", (u_long)parentdir);
 505                         /*
 506                          * The parent directory, because of the ordering
 507                          * guarantees, has had the link count incremented
 508                          * for the child, but no entry was made.  This
 509                          * fixes the parent link count so that fsck does
 510                          * not need to be rerun.
 511                          */
 512                         inoinfo(parentdir)->ino_linkcnt++;
 513                 }
 514                 if (preen == 0)
 515                         printf("\n");
 516         }
 517         return (1);
 518 }
 519
 520 /*
 521  * fix an entry in a directory.
 522  */
 523 int
 524 changeino(ufs1_ino_t dir, char *name, ufs1_ino_t newnum)
 525 {
 526         struct inodesc idesc;
 527
 528         memset(&idesc, 0, sizeof(struct inodesc));
 529         idesc.id_type = DATA;
 530         idesc.id_func = chgino;
 531         idesc.id_number = dir;
 532         idesc.id_fix = DONTKNOW;
 533         idesc.id_name = name;
 534         idesc.id_parent = newnum;       /* new value for name */
 535         return (ckinode(ginode(dir), &idesc));
 536 }
 537
 538 /*
 539  * make an entry in a directory
 540  */
 541 int
 542 makeentry(ufs1_ino_t parent, ufs1_ino_t ino, char *name)
 543 {
 544         struct ufs1_dinode *dp;
 545         struct inodesc idesc;
 546         char pathbuf[MAXPATHLEN + 1];
 547
 548         if (parent < UFS_ROOTINO || parent >= maxino ||
 549             ino < UFS_ROOTINO || ino >= maxino)
 550                 return (0);
 551         memset(&idesc, 0, sizeof(struct inodesc));
 552         idesc.id_type = DATA;
 553         idesc.id_func = mkentry;
 554         idesc.id_number = parent;
 555         idesc.id_parent = ino;  /* this is the inode to enter */
 556         idesc.id_fix = DONTKNOW;
 557         idesc.id_name = name;
 558         dp = ginode(parent);
 559         if (dp->di_size % DIRBLKSIZ) {
 560                 dp->di_size = roundup(dp->di_size, DIRBLKSIZ);
 561                 inodirty();
 562         }
 563         if ((ckinode(dp, &idesc) & ALTERED) != 0)
 564                 return (1);
 565         getpathname(pathbuf, parent, parent);
 566         dp = ginode(parent);
 567         if (expanddir(dp, pathbuf) == 0)
 568                 return (0);
 569         return (ckinode(dp, &idesc) & ALTERED);
 570 }
 571
 572 /*
 573  * Attempt to expand the size of a directory
 574  */
 575 static int
 576 expanddir(struct ufs1_dinode *dp, char *name)
 577 {
 578         ufs_daddr_t lastbn, newblk;
 579         struct bufarea *bp;
 580         char *cp, firstblk[DIRBLKSIZ];
 581
 582         lastbn = lblkno(&sblock, dp->di_size);
 583         if (lastbn >= UFS_NDADDR - 1 || dp->di_db[lastbn] == 0 ||
 584             dp->di_size == 0)
 585                 return (0);
 586         if ((newblk = allocblk(sblock.fs_frag)) == 0)
 587                 return (0);
 588         dp->di_db[lastbn + 1] = dp->di_db[lastbn];
 589         dp->di_db[lastbn] = newblk;
 590         dp->di_size += sblock.fs_bsize;
 591         dp->di_blocks += btodb(sblock.fs_bsize);
 592         bp = getdirblk(dp->di_db[lastbn + 1],
 593                 (long)dblksize(&sblock, dp, lastbn + 1));
 594         if (bp->b_errs)
 595                 goto bad;
 596         memmove(firstblk, bp->b_un.b_buf, DIRBLKSIZ);
 597         bp = getdirblk(newblk, sblock.fs_bsize);
 598         if (bp->b_errs)
 599                 goto bad;
 600         memmove(bp->b_un.b_buf, firstblk, DIRBLKSIZ);
 601         for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
 602              cp < &bp->b_un.b_buf[sblock.fs_bsize];
 603              cp += DIRBLKSIZ)
 604                 memmove(cp, &emptydir, sizeof emptydir);
 605         dirty(bp);
 606         bp = getdirblk(dp->di_db[lastbn + 1],
 607                 (long)dblksize(&sblock, dp, lastbn + 1));
 608         if (bp->b_errs)
 609                 goto bad;
 610         memmove(bp->b_un.b_buf, &emptydir, sizeof emptydir);
 611         pwarn("NO SPACE LEFT IN %s", name);
 612         if (preen)
 613                 printf(" (EXPANDED)\n");
 614         else if (reply("EXPAND") == 0)
 615                 goto bad;
 616         dirty(bp);
 617         inodirty();
 618         return (1);
 619 bad:
 620         dp->di_db[lastbn] = dp->di_db[lastbn + 1];
 621         dp->di_db[lastbn + 1] = 0;
 622         dp->di_size -= sblock.fs_bsize;
 623         dp->di_blocks -= btodb(sblock.fs_bsize);
 624         freeblk(newblk, sblock.fs_frag);
 625         return (0);
 626 }
 627
 628 /*
 629  * allocate a new directory
 630  */
 631 ufs1_ino_t
 632 allocdir(ufs1_ino_t parent, ufs1_ino_t request, int mode)
 633 {
 634         ufs1_ino_t ino;
 635         char *cp;
 636         struct ufs1_dinode *dp;
 637         struct bufarea *bp;
 638         struct dirtemplate *dirp;
 639
 640         ino = allocino(request, IFDIR|mode);
 641         if (newinofmt)
 642                 dirp = &dirhead;
 643         else
 644                 dirp = (struct dirtemplate *)&odirhead;
 645         dirp->dot_ino = ino;
 646         dirp->dotdot_ino = parent;
 647         dp = ginode(ino);
 648         bp = getdirblk(dp->di_db[0], sblock.fs_fsize);
 649         if (bp->b_errs) {
 650                 freeino(ino);
 651                 return (0);
 652         }
 653         memmove(bp->b_un.b_buf, dirp, sizeof(struct dirtemplate));
 654         for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
 655              cp < &bp->b_un.b_buf[sblock.fs_fsize];
 656              cp += DIRBLKSIZ)
 657                 memmove(cp, &emptydir, sizeof emptydir);
 658         dirty(bp);
 659         dp->di_nlink = 2;
 660         inodirty();
 661         if (ino == UFS_ROOTINO) {
 662                 inoinfo(ino)->ino_linkcnt = dp->di_nlink;
 663                 cacheino(dp, ino);
 664                 return(ino);
 665         }
 666         if (inoinfo(parent)->ino_state != DSTATE &&
 667             inoinfo(parent)->ino_state != DFOUND) {
 668                 freeino(ino);
 669                 return (0);
 670         }
 671         cacheino(dp, ino);
 672         inoinfo(ino)->ino_state = inoinfo(parent)->ino_state;
 673         if (inoinfo(ino)->ino_state == DSTATE) {
 674                 inoinfo(ino)->ino_linkcnt = dp->di_nlink;
 675                 inoinfo(parent)->ino_linkcnt++;
 676         }
 677         dp = ginode(parent);
 678         dp->di_nlink++;
 679         inodirty();
 680         return (ino);
 681 }
 682
 683 /*
 684  * free a directory inode
 685  */
 686 static void
 687 freedir(ufs1_ino_t ino, ufs1_ino_t parent)
 688 {
 689         struct ufs1_dinode *dp;
 690
 691         if (ino != parent) {
 692                 dp = ginode(parent);
 693                 dp->di_nlink--;
 694                 inodirty();
 695         }
 696         freeino(ino);
 697 }
 698
 699 /*
 700  * generate a temporary name for the lost+found directory.
 701  */
 702 static int
 703 lftempname(char *bufp, ufs1_ino_t ino)
 704 {
 705         ufs1_ino_t in;
 706         char *cp;
 707         int namlen;
 708
 709         cp = bufp + 2;
 710         for (in = maxino; in > 0; in /= 10)
 711                 cp++;
 712         *--cp = 0;
 713         namlen = cp - bufp;
 714         in = ino;
 715         while (cp > bufp) {
 716                 *--cp = (in % 10) + '0';
 717                 in /= 10;
 718         }
 719         *cp = '#';
 720         return (namlen);
 721 }
 722
 723 /*
 724  * Get a directory block.
 725  * Insure that it is held until another is requested.
 726  */
 727 static struct bufarea *
 728 getdirblk(ufs_daddr_t blkno, long size)
 729 {
 730
 731         if (pdirbp != 0)
 732                 pdirbp->b_flags &= ~B_INUSE;
 733         pdirbp = getdatablk(blkno, size);
 734         return (pdirbp);
 735 }