1 /* $OpenBSD: dir.c,v 1.19 2014/07/13 16:08:53 pelikan Exp $ */ 2 /* $NetBSD: dir.c,v 1.5 2000/01/28 16:01:46 bouyer Exp $ */ 3 4 /* 5 * Copyright (c) 1997 Manuel Bouyer. 6 * Copyright (c) 1980, 1986, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/time.h> 36 #include <ufs/ufs/dir.h> 37 #include <ufs/ext2fs/ext2fs_dinode.h> 38 #include <ufs/ext2fs/ext2fs_dir.h> 39 #include <ufs/ext2fs/ext2fs.h> 40 41 #include <ufs/ufs/dinode.h> /* for IFMT & friends */ 42 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 #include "fsck.h" 48 #include "fsutil.h" 49 #include "extern.h" 50 51 char *lfname = "lost+found"; 52 int lfmode = 01777; 53 struct ext2fs_dirtemplate emptydir = { 0, DIRBLKSIZ }; 54 struct ext2fs_dirtemplate dirhead = { 55 0, 12, 1, EXT2_FT_DIR, ".", 56 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".." 57 }; 58 #undef DIRBLKSIZ 59 60 static int expanddir(struct ext2fs_dinode *, char *); 61 static void freedir(ino_t, ino_t); 62 static struct ext2fs_direct *fsck_readdir(struct inodesc *); 63 static struct bufarea *getdirblk(daddr32_t, long); 64 static int lftempname(char *, ino_t); 65 static int mkentry(struct inodesc *); 66 static int chgino(struct inodesc *); 67 68 /* 69 * Propagate connected state through the tree. 70 */ 71 void 72 propagate(void) 73 { 74 struct inoinfo **inpp, *inp, *pinp; 75 struct inoinfo **inpend; 76 77 /* 78 * Create a list of children for each directory. 79 */ 80 inpend = &inpsort[inplast]; 81 for (inpp = inpsort; inpp < inpend; inpp++) { 82 inp = *inpp; 83 if (inp->i_parent == 0 || 84 inp->i_number == EXT2_ROOTINO) 85 continue; 86 pinp = getinoinfo(inp->i_parent); 87 inp->i_parentp = pinp; 88 inp->i_sibling = pinp->i_child; 89 pinp->i_child = inp; 90 } 91 inp = getinoinfo(EXT2_ROOTINO); 92 while (inp) { 93 statemap[inp->i_number] = DFOUND; 94 if (inp->i_child && 95 statemap[inp->i_child->i_number] == DSTATE) 96 inp = inp->i_child; 97 else if (inp->i_sibling) 98 inp = inp->i_sibling; 99 else 100 inp = inp->i_parentp; 101 } 102 } 103 104 /* 105 * Scan each entry in a directory block. 106 */ 107 int 108 dirscan(struct inodesc *idesc) 109 { 110 struct ext2fs_direct *dp; 111 struct bufarea *bp; 112 int dsize, n; 113 long blksiz; 114 char *dbuf = NULL; 115 116 if ((dbuf = malloc(sblock.e2fs_bsize)) == NULL) { 117 fprintf(stderr, "out of memory"); 118 exit(8); 119 } 120 121 if (idesc->id_type != DATA) 122 errexit("wrong type to dirscan %d\n", idesc->id_type); 123 if (idesc->id_entryno == 0 && 124 (idesc->id_filesize & (sblock.e2fs_bsize - 1)) != 0) 125 idesc->id_filesize = roundup(idesc->id_filesize, sblock.e2fs_bsize); 126 blksiz = idesc->id_numfrags * sblock.e2fs_bsize; 127 if (chkrange(idesc->id_blkno, idesc->id_numfrags)) { 128 idesc->id_filesize -= blksiz; 129 free(dbuf); 130 return (SKIP); 131 } 132 idesc->id_loc = 0; 133 for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) { 134 dsize = letoh16(dp->e2d_reclen); 135 memcpy(dbuf, dp, (size_t)dsize); 136 idesc->id_dirp = (struct ext2fs_direct *)dbuf; 137 if ((n = (*idesc->id_func)(idesc)) & ALTERED) { 138 bp = getdirblk(idesc->id_blkno, blksiz); 139 memcpy(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf, 140 (size_t)dsize); 141 dirty(bp); 142 sbdirty(); 143 } 144 if (n & STOP) { 145 free(dbuf); 146 return (n); 147 } 148 } 149 free(dbuf); 150 return (idesc->id_filesize > 0 ? KEEPON : STOP); 151 } 152 153 /* 154 * get next entry in a directory. 155 */ 156 static struct ext2fs_direct * 157 fsck_readdir(struct inodesc *idesc) 158 { 159 struct ext2fs_direct *dp, *ndp; 160 struct bufarea *bp; 161 long size, blksiz, fix, dploc; 162 163 blksiz = idesc->id_numfrags * sblock.e2fs_bsize; 164 bp = getdirblk(idesc->id_blkno, blksiz); 165 if (idesc->id_loc % sblock.e2fs_bsize == 0 && idesc->id_filesize > 0 && 166 idesc->id_loc < blksiz) { 167 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc); 168 if (dircheck(idesc, dp)) 169 goto dpok; 170 if (idesc->id_fix == IGNORE) 171 return (0); 172 fix = dofix(idesc, "DIRECTORY CORRUPTED"); 173 bp = getdirblk(idesc->id_blkno, blksiz); 174 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc); 175 dp->e2d_reclen = htole16(sblock.e2fs_bsize); 176 dp->e2d_ino = 0; 177 dp->e2d_namlen = 0; 178 dp->e2d_type = 0; 179 dp->e2d_name[0] = '\0'; 180 if (fix) 181 dirty(bp); 182 idesc->id_loc += sblock.e2fs_bsize; 183 idesc->id_filesize -= sblock.e2fs_bsize; 184 return (dp); 185 } 186 dpok: 187 if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz) 188 return NULL; 189 dploc = idesc->id_loc; 190 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc); 191 idesc->id_loc += letoh16(dp->e2d_reclen); 192 idesc->id_filesize -= letoh16(dp->e2d_reclen); 193 if ((idesc->id_loc % sblock.e2fs_bsize) == 0) 194 return (dp); 195 ndp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc); 196 if (idesc->id_loc < blksiz && idesc->id_filesize > 0 && 197 dircheck(idesc, ndp) == 0) { 198 size = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize); 199 idesc->id_loc += size; 200 idesc->id_filesize -= size; 201 if (idesc->id_fix == IGNORE) 202 return (0); 203 fix = dofix(idesc, "DIRECTORY CORRUPTED"); 204 bp = getdirblk(idesc->id_blkno, blksiz); 205 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc); 206 dp->e2d_reclen = htole16(letoh16(dp->e2d_reclen) + size); 207 if (fix) 208 dirty(bp); 209 } 210 return (dp); 211 } 212 213 /* 214 * Verify that a directory entry is valid. 215 * This is a superset of the checks made in the kernel. 216 */ 217 int 218 dircheck(struct inodesc *idesc, struct ext2fs_direct *dp) 219 { 220 int size; 221 char *cp; 222 int spaceleft; 223 u_int16_t reclen = letoh16(dp->e2d_reclen); 224 225 spaceleft = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize); 226 if (letoh32(dp->e2d_ino) > maxino || 227 reclen == 0 || 228 reclen > spaceleft || 229 (reclen & 0x3) != 0) 230 return (0); 231 if (dp->e2d_ino == 0) 232 return (1); 233 if (sblock.e2fs.e2fs_rev < E2FS_REV1 || 234 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE) == 0) 235 if (dp->e2d_type != 0) 236 return (1); 237 size = EXT2FS_DIRSIZ(dp->e2d_namlen); 238 if (reclen < size || 239 idesc->id_filesize < size || 240 dp->e2d_namlen > EXT2FS_MAXNAMLEN) 241 return (0); 242 for (cp = dp->e2d_name, size = 0; size < dp->e2d_namlen; size++) 243 if (*cp == '\0' || (*cp++ == '/')) 244 return (0); 245 return (1); 246 } 247 248 void 249 direrror(ino_t ino, char *errmesg) 250 { 251 252 fileerror(ino, ino, errmesg); 253 } 254 255 void 256 fileerror(ino_t cwd, ino_t ino, char *errmesg) 257 { 258 struct ext2fs_dinode *dp; 259 char pathbuf[MAXPATHLEN + 1]; 260 261 pwarn("%s ", errmesg); 262 pinode(ino); 263 printf("\n"); 264 getpathname(pathbuf, sizeof pathbuf, cwd, ino); 265 if ((ino < EXT2_FIRSTINO && ino != EXT2_ROOTINO) || ino > maxino) { 266 pfatal("NAME=%s\n", pathbuf); 267 return; 268 } 269 dp = ginode(ino); 270 if (ftypeok(dp)) 271 pfatal("%s=%s\n", 272 (letoh16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf); 273 else 274 pfatal("NAME=%s\n", pathbuf); 275 } 276 277 void 278 adjust(struct inodesc *idesc, short lcnt) 279 { 280 struct ext2fs_dinode *dp; 281 282 dp = ginode(idesc->id_number); 283 if (letoh16(dp->e2di_nlink) == lcnt) { 284 if (linkup(idesc->id_number, (ino_t)0) == 0) 285 clri(idesc, "UNREF", 0); 286 } else { 287 pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname : 288 ((letoh16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE")); 289 pinode(idesc->id_number); 290 printf(" COUNT %d SHOULD BE %d", 291 letoh16(dp->e2di_nlink), letoh16(dp->e2di_nlink) - lcnt); 292 if (preen) { 293 if (lcnt < 0) { 294 printf("\n"); 295 pfatal("LINK COUNT INCREASING"); 296 } 297 printf(" (ADJUSTED)\n"); 298 } 299 if (preen || reply("ADJUST") == 1) { 300 dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) - lcnt); 301 inodirty(); 302 } 303 } 304 } 305 306 static int 307 mkentry(struct inodesc *idesc) 308 { 309 struct ext2fs_direct *dirp = idesc->id_dirp; 310 struct ext2fs_direct newent; 311 int newlen, oldlen; 312 313 newent.e2d_type = EXT2_FT_UNKNOWN; 314 newent.e2d_namlen = strlen(idesc->id_name); 315 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 316 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) 317 newent.e2d_type = inot2ext2dt(typemap[idesc->id_parent]); 318 newlen = EXT2FS_DIRSIZ(newent.e2d_namlen); 319 if (dirp->e2d_ino != 0) 320 oldlen = EXT2FS_DIRSIZ(dirp->e2d_namlen); 321 else 322 oldlen = 0; 323 if (letoh16(dirp->e2d_reclen) - oldlen < newlen) 324 return (KEEPON); 325 newent.e2d_reclen = htole16(letoh16(dirp->e2d_reclen) - oldlen); 326 dirp->e2d_reclen = htole16(oldlen); 327 dirp = (struct ext2fs_direct *)(((char *)dirp) + oldlen); 328 dirp->e2d_ino = htole32(idesc->id_parent); /* ino to be entered is in id_parent */ 329 dirp->e2d_reclen = newent.e2d_reclen; 330 dirp->e2d_namlen = newent.e2d_namlen; 331 dirp->e2d_type = newent.e2d_type; 332 memcpy(dirp->e2d_name, idesc->id_name, (size_t)(dirp->e2d_namlen)); 333 return (ALTERED|STOP); 334 } 335 336 static int 337 chgino(struct inodesc *idesc) 338 { 339 struct ext2fs_direct *dirp = idesc->id_dirp; 340 u_int16_t namlen = dirp->e2d_namlen; 341 342 if (strlen(idesc->id_name) != namlen || 343 strncmp(dirp->e2d_name, idesc->id_name, (int)namlen)) 344 return (KEEPON); 345 dirp->e2d_ino = htole32(idesc->id_parent); 346 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 347 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) 348 dirp->e2d_type = inot2ext2dt(typemap[idesc->id_parent]); 349 else 350 dirp->e2d_type = 0; 351 return (ALTERED|STOP); 352 } 353 354 int 355 linkup(ino_t orphan, ino_t parentdir) 356 { 357 struct ext2fs_dinode *dp; 358 int lostdir; 359 ino_t oldlfdir; 360 struct inodesc idesc; 361 char tempname[BUFSIZ]; 362 363 memset(&idesc, 0, sizeof(struct inodesc)); 364 dp = ginode(orphan); 365 lostdir = (letoh16(dp->e2di_mode) & IFMT) == IFDIR; 366 pwarn("UNREF %s ", lostdir ? "DIR" : "FILE"); 367 pinode(orphan); 368 if (preen && inosize(dp) == 0) 369 return (0); 370 if (preen) 371 printf(" (RECONNECTED)\n"); 372 else 373 if (reply("RECONNECT") == 0) 374 return (0); 375 if (lfdir == 0) { 376 dp = ginode(EXT2_ROOTINO); 377 idesc.id_name = lfname; 378 idesc.id_type = DATA; 379 idesc.id_func = findino; 380 idesc.id_number = EXT2_ROOTINO; 381 if ((ckinode(dp, &idesc) & FOUND) != 0) { 382 lfdir = idesc.id_parent; 383 } else { 384 pwarn("NO lost+found DIRECTORY"); 385 if (preen || reply("CREATE")) { 386 lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode); 387 if (lfdir != 0) { 388 if (makeentry(EXT2_ROOTINO, lfdir, lfname) != 0) { 389 if (preen) 390 printf(" (CREATED)\n"); 391 } else { 392 freedir(lfdir, EXT2_ROOTINO); 393 lfdir = 0; 394 if (preen) 395 printf("\n"); 396 } 397 } 398 } 399 } 400 if (lfdir == 0) { 401 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY"); 402 printf("\n\n"); 403 return (0); 404 } 405 } 406 dp = ginode(lfdir); 407 if ((letoh16(dp->e2di_mode) & IFMT) != IFDIR) { 408 pfatal("lost+found IS NOT A DIRECTORY"); 409 if (reply("REALLOCATE") == 0) 410 return (0); 411 oldlfdir = lfdir; 412 if ((lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode)) == 0) { 413 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n"); 414 return (0); 415 } 416 if ((changeino(EXT2_ROOTINO, lfname, lfdir) & ALTERED) == 0) { 417 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n"); 418 return (0); 419 } 420 inodirty(); 421 idesc.id_type = ADDR; 422 idesc.id_func = pass4check; 423 idesc.id_number = oldlfdir; 424 adjust(&idesc, lncntp[oldlfdir] + 1); 425 lncntp[oldlfdir] = 0; 426 dp = ginode(lfdir); 427 } 428 if (statemap[lfdir] != DFOUND) { 429 pfatal("SORRY. NO lost+found DIRECTORY\n\n"); 430 return (0); 431 } 432 (void)lftempname(tempname, orphan); 433 if (makeentry(lfdir, orphan, tempname) == 0) { 434 pfatal("SORRY. NO SPACE IN lost+found DIRECTORY"); 435 printf("\n\n"); 436 return (0); 437 } 438 lncntp[orphan]--; 439 if (lostdir) { 440 if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 && 441 parentdir != (ino_t)-1) 442 (void)makeentry(orphan, lfdir, ".."); 443 dp = ginode(lfdir); 444 dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) +1); 445 inodirty(); 446 lncntp[lfdir]++; 447 pwarn("DIR I=%llu CONNECTED. ", (unsigned long long)orphan); 448 if (parentdir != (ino_t)-1) 449 printf("PARENT WAS I=%llu\n", 450 (unsigned long long)parentdir); 451 if (preen == 0) 452 printf("\n"); 453 } 454 return (1); 455 } 456 457 /* 458 * fix an entry in a directory. 459 */ 460 int 461 changeino(ino_t dir, char *name, ino_t newnum) 462 { 463 struct inodesc idesc; 464 465 memset(&idesc, 0, sizeof(struct inodesc)); 466 idesc.id_type = DATA; 467 idesc.id_func = chgino; 468 idesc.id_number = dir; 469 idesc.id_fix = DONTKNOW; 470 idesc.id_name = name; 471 idesc.id_parent = newnum; /* new value for name */ 472 return (ckinode(ginode(dir), &idesc)); 473 } 474 475 /* 476 * make an entry in a directory 477 */ 478 int 479 makeentry(ino_t parent, ino_t ino, char *name) 480 { 481 struct ext2fs_dinode *dp; 482 struct inodesc idesc; 483 char pathbuf[MAXPATHLEN + 1]; 484 485 if ((parent < EXT2_FIRSTINO && parent != EXT2_ROOTINO) 486 || parent >= maxino || 487 (ino < EXT2_FIRSTINO && ino < EXT2_ROOTINO) || ino >= maxino) 488 return (0); 489 memset(&idesc, 0, sizeof(struct inodesc)); 490 idesc.id_type = DATA; 491 idesc.id_func = mkentry; 492 idesc.id_number = parent; 493 idesc.id_parent = ino; /* this is the inode to enter */ 494 idesc.id_fix = DONTKNOW; 495 idesc.id_name = name; 496 dp = ginode(parent); 497 if (inosize(dp) % sblock.e2fs_bsize) { 498 inossize(dp, roundup(inosize(dp), sblock.e2fs_bsize)); 499 inodirty(); 500 } 501 if ((ckinode(dp, &idesc) & ALTERED) != 0) 502 return (1); 503 getpathname(pathbuf, sizeof pathbuf, parent, parent); 504 dp = ginode(parent); 505 if (expanddir(dp, pathbuf) == 0) 506 return (0); 507 return (ckinode(dp, &idesc) & ALTERED); 508 } 509 510 /* 511 * Attempt to expand the size of a directory 512 */ 513 static int 514 expanddir(struct ext2fs_dinode *dp, char *name) 515 { 516 daddr32_t lastbn, newblk; 517 struct bufarea *bp; 518 char *firstblk; 519 520 lastbn = lblkno(&sblock, inosize(dp)); 521 if (lastbn >= NDADDR - 1 || letoh32(dp->e2di_blocks[lastbn]) == 0 || 522 inosize(dp) == 0) 523 return (0); 524 if ((newblk = allocblk()) == 0) 525 return (0); 526 dp->e2di_blocks[lastbn + 1] = dp->e2di_blocks[lastbn]; 527 dp->e2di_blocks[lastbn] = htole32(newblk); 528 inossize(dp, inosize(dp) + sblock.e2fs_bsize); 529 dp->e2di_nblock = htole32(letoh32(dp->e2di_nblock) + 1); 530 bp = getdirblk(letoh32(dp->e2di_blocks[lastbn + 1]), 531 sblock.e2fs_bsize); 532 if (bp->b_errs) 533 goto bad; 534 if ((firstblk = malloc(sblock.e2fs_bsize)) == NULL) { 535 fprintf(stderr, "out of memory\n"); 536 exit(8); 537 } 538 memcpy(firstblk, bp->b_un.b_buf, sblock.e2fs_bsize); 539 bp = getdirblk(newblk, sblock.e2fs_bsize); 540 if (bp->b_errs) { 541 free(firstblk); 542 goto bad; 543 } 544 memcpy(bp->b_un.b_buf, firstblk, sblock.e2fs_bsize); 545 free(firstblk); 546 dirty(bp); 547 bp = getdirblk(letoh32(dp->e2di_blocks[lastbn + 1]), 548 sblock.e2fs_bsize); 549 if (bp->b_errs) 550 goto bad; 551 emptydir.dot_reclen = htole16(sblock.e2fs_bsize); 552 memcpy(bp->b_un.b_buf, &emptydir, sizeof emptydir); 553 pwarn("NO SPACE LEFT IN %s", name); 554 if (preen) 555 printf(" (EXPANDED)\n"); 556 else if (reply("EXPAND") == 0) 557 goto bad; 558 dirty(bp); 559 inodirty(); 560 return (1); 561 bad: 562 dp->e2di_blocks[lastbn] = dp->e2di_blocks[lastbn + 1]; 563 dp->e2di_blocks[lastbn + 1] = 0; 564 dp->e2di_size = htole32(letoh32(dp->e2di_size) - sblock.e2fs_bsize); 565 inossize(dp, inosize(dp) - sblock.e2fs_bsize); 566 dp->e2di_nblock = htole32(letoh32(dp->e2di_nblock) - 1); 567 freeblk(newblk); 568 return (0); 569 } 570 571 /* 572 * allocate a new directory 573 */ 574 int 575 allocdir(ino_t parent, ino_t request, int mode) 576 { 577 ino_t ino; 578 struct ext2fs_dinode *dp; 579 struct bufarea *bp; 580 struct ext2fs_dirtemplate *dirp; 581 582 ino = allocino(request, IFDIR|mode); 583 dirhead.dot_reclen = htole16(12); /* XXX */ 584 dirhead.dotdot_reclen = htole16(sblock.e2fs_bsize - 12); /* XXX */ 585 dirhead.dot_namlen = 1; 586 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 587 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) 588 dirhead.dot_type = EXT2_FT_DIR; 589 else 590 dirhead.dot_type = 0; 591 dirhead.dotdot_namlen = 2; 592 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 593 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) 594 dirhead.dotdot_type = EXT2_FT_DIR; 595 else 596 dirhead.dotdot_type = 0; 597 dirp = &dirhead; 598 dirp->dot_ino = htole32(ino); 599 dirp->dotdot_ino = htole32(parent); 600 dp = ginode(ino); 601 bp = getdirblk(letoh32(dp->e2di_blocks[0]), sblock.e2fs_bsize); 602 if (bp->b_errs) { 603 freeino(ino); 604 return (0); 605 } 606 memcpy(bp->b_un.b_buf, dirp, sizeof(struct ext2fs_dirtemplate)); 607 dirty(bp); 608 dp->e2di_nlink = htole16(2); 609 inodirty(); 610 if (ino == EXT2_ROOTINO) { 611 lncntp[ino] = letoh16(dp->e2di_nlink); 612 cacheino(dp, ino); 613 return(ino); 614 } 615 if (statemap[parent] != DSTATE && statemap[parent] != DFOUND) { 616 freeino(ino); 617 return (0); 618 } 619 cacheino(dp, ino); 620 statemap[ino] = statemap[parent]; 621 if (statemap[ino] == DSTATE) { 622 lncntp[ino] = letoh16(dp->e2di_nlink); 623 lncntp[parent]++; 624 } 625 dp = ginode(parent); 626 dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) + 1); 627 inodirty(); 628 return (ino); 629 } 630 631 /* 632 * free a directory inode 633 */ 634 static void 635 freedir(ino_t ino, ino_t parent) 636 { 637 struct ext2fs_dinode *dp; 638 639 if (ino != parent) { 640 dp = ginode(parent); 641 dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) - 1); 642 inodirty(); 643 } 644 freeino(ino); 645 } 646 647 /* 648 * generate a temporary name for the lost+found directory. 649 */ 650 static int 651 lftempname(char *bufp, ino_t ino) 652 { 653 ino_t in; 654 char *cp; 655 int namlen; 656 657 cp = bufp + 2; 658 for (in = maxino; in > 0; in /= 10) 659 cp++; 660 *--cp = 0; 661 namlen = cp - bufp; 662 in = ino; 663 while (cp > bufp) { 664 *--cp = (in % 10) + '0'; 665 in /= 10; 666 } 667 *cp = '#'; 668 return (namlen); 669 } 670 671 /* 672 * Get a directory block. 673 * Insure that it is held until another is requested. 674 */ 675 static struct bufarea * 676 getdirblk(daddr32_t blkno, long size) 677 { 678 679 if (pdirbp != 0) 680 pdirbp->b_flags &= ~B_INUSE; 681 pdirbp = getdatablk(blkno, size); 682 return (pdirbp); 683 } 684