1 /* $NetBSD: dir.c,v 1.28 2013/06/23 07:28:36 dholland 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 /* 33 * Copyright (c) 1997 Manuel Bouyer. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 47 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 48 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 49 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 53 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 */ 55 56 #include <sys/cdefs.h> 57 #ifndef lint 58 #if 0 59 static char sccsid[] = "@(#)dir.c 8.5 (Berkeley) 12/8/94"; 60 #else 61 __RCSID("$NetBSD: dir.c,v 1.28 2013/06/23 07:28:36 dholland Exp $"); 62 #endif 63 #endif /* not lint */ 64 65 #include <sys/param.h> 66 #include <sys/time.h> 67 #include <ufs/ufs/dir.h> 68 #include <ufs/ext2fs/ext2fs_dinode.h> 69 #include <ufs/ext2fs/ext2fs_dir.h> 70 #include <ufs/ext2fs/ext2fs.h> 71 72 #include <ufs/ufs/dinode.h> /* for IFMT & friends */ 73 74 #include <stdio.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <err.h> 78 79 #include "fsck.h" 80 #include "fsutil.h" 81 #include "extern.h" 82 83 const char *lfname = "lost+found"; 84 int lfmode = 01700; 85 struct ext2fs_dirtemplate emptydir = { 86 .dot_ino = 0, 87 .dot_reclen = UFS_DIRBLKSIZ, 88 }; 89 struct ext2fs_dirtemplate dirhead = { 90 .dot_ino = 0, 91 .dot_reclen = 12, 92 .dot_namlen = 1, 93 .dot_type = EXT2_FT_DIR, 94 .dot_name = ".", 95 .dotdot_ino = 0, 96 .dotdot_reclen = UFS_DIRBLKSIZ - 12, 97 .dotdot_namlen = 2, 98 .dotdot_type = EXT2_FT_DIR, 99 .dotdot_name = "..", 100 }; 101 #undef UFS_DIRBLKSIZ 102 103 static int expanddir(struct ext2fs_dinode *, char *); 104 static void freedir(ino_t, ino_t); 105 static struct ext2fs_direct *fsck_readdir(struct inodesc *); 106 static struct bufarea *getdirblk(daddr_t, long); 107 static int lftempname(char *, ino_t); 108 static int mkentry(struct inodesc *); 109 static int chgino(struct inodesc *); 110 111 /* 112 * Propagate connected state through the tree. 113 */ 114 void 115 propagate(void) 116 { 117 struct inoinfo **inpp, *inp, *pinp; 118 struct inoinfo **inpend; 119 120 /* 121 * Create a list of children for each directory. 122 */ 123 inpend = &inpsort[inplast]; 124 for (inpp = inpsort; inpp < inpend; inpp++) { 125 inp = *inpp; 126 if (inp->i_parent == 0 || 127 inp->i_number == EXT2_ROOTINO) 128 continue; 129 pinp = getinoinfo(inp->i_parent); 130 inp->i_parentp = pinp; 131 inp->i_sibling = pinp->i_child; 132 pinp->i_child = inp; 133 } 134 inp = getinoinfo(EXT2_ROOTINO); 135 while (inp) { 136 statemap[inp->i_number] = DFOUND; 137 if (inp->i_child && 138 statemap[inp->i_child->i_number] == DSTATE) 139 inp = inp->i_child; 140 else if (inp->i_sibling) 141 inp = inp->i_sibling; 142 else 143 inp = inp->i_parentp; 144 } 145 } 146 147 /* 148 * Scan each entry in a directory block. 149 */ 150 int 151 dirscan(struct inodesc *idesc) 152 { 153 struct ext2fs_direct *dp; 154 struct bufarea *bp; 155 int dsize, n; 156 long blksiz; 157 char *dbuf = NULL; 158 159 if ((dbuf = malloc(sblock.e2fs_bsize)) == NULL) 160 err(8, "Can't allocate directory block"); 161 162 if (idesc->id_type != DATA) 163 errexit("wrong type to dirscan %d", idesc->id_type); 164 if (idesc->id_entryno == 0 && 165 (idesc->id_filesize & (sblock.e2fs_bsize - 1)) != 0) 166 idesc->id_filesize = roundup(idesc->id_filesize, sblock.e2fs_bsize); 167 blksiz = idesc->id_numfrags * sblock.e2fs_bsize; 168 if (chkrange(idesc->id_blkno, idesc->id_numfrags)) { 169 idesc->id_filesize -= blksiz; 170 free(dbuf); 171 return (SKIP); 172 } 173 idesc->id_loc = 0; 174 for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) { 175 dsize = fs2h16(dp->e2d_reclen); 176 memcpy(dbuf, dp, (size_t)dsize); 177 idesc->id_dirp = (struct ext2fs_direct *)dbuf; 178 if ((n = (*idesc->id_func)(idesc)) & ALTERED) { 179 bp = getdirblk(idesc->id_blkno, blksiz); 180 memcpy(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf, 181 (size_t)dsize); 182 dirty(bp); 183 sbdirty(); 184 } 185 if (n & STOP) { 186 free(dbuf); 187 return (n); 188 } 189 } 190 free(dbuf); 191 return (idesc->id_filesize > 0 ? KEEPON : STOP); 192 } 193 194 /* 195 * get next entry in a directory. 196 */ 197 static struct ext2fs_direct * 198 fsck_readdir(struct inodesc *idesc) 199 { 200 struct ext2fs_direct *dp, *ndp; 201 struct bufarea *bp; 202 long size, blksiz, fix, dploc; 203 204 blksiz = idesc->id_numfrags * sblock.e2fs_bsize; 205 bp = getdirblk(idesc->id_blkno, blksiz); 206 if (idesc->id_loc % sblock.e2fs_bsize == 0 && idesc->id_filesize > 0 && 207 idesc->id_loc < blksiz) { 208 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc); 209 if (dircheck(idesc, dp)) 210 goto dpok; 211 if (idesc->id_fix == IGNORE) 212 return (0); 213 fix = dofix(idesc, "DIRECTORY CORRUPTED"); 214 bp = getdirblk(idesc->id_blkno, blksiz); 215 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc); 216 dp->e2d_reclen = h2fs16(sblock.e2fs_bsize); 217 dp->e2d_ino = 0; 218 dp->e2d_namlen = 0; 219 dp->e2d_type = 0; 220 dp->e2d_name[0] = '\0'; 221 if (fix) 222 dirty(bp); 223 idesc->id_loc += sblock.e2fs_bsize; 224 idesc->id_filesize -= sblock.e2fs_bsize; 225 return (dp); 226 } 227 dpok: 228 if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz) 229 return NULL; 230 dploc = idesc->id_loc; 231 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc); 232 idesc->id_loc += fs2h16(dp->e2d_reclen); 233 idesc->id_filesize -= fs2h16(dp->e2d_reclen); 234 if ((idesc->id_loc % sblock.e2fs_bsize) == 0) 235 return (dp); 236 ndp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc); 237 if (idesc->id_loc < blksiz && idesc->id_filesize > 0 && 238 dircheck(idesc, ndp) == 0) { 239 size = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize); 240 idesc->id_loc += size; 241 idesc->id_filesize -= size; 242 if (idesc->id_fix == IGNORE) 243 return (0); 244 fix = dofix(idesc, "DIRECTORY CORRUPTED"); 245 bp = getdirblk(idesc->id_blkno, blksiz); 246 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc); 247 dp->e2d_reclen = h2fs16(fs2h16(dp->e2d_reclen) + size); 248 if (fix) 249 dirty(bp); 250 } 251 return (dp); 252 } 253 254 /* 255 * Verify that a directory entry is valid. 256 * This is a superset of the checks made in the kernel. 257 */ 258 int 259 dircheck(struct inodesc *idesc, struct ext2fs_direct *dp) 260 { 261 int size; 262 char *cp; 263 int spaceleft; 264 u_int16_t reclen = fs2h16(dp->e2d_reclen); 265 266 spaceleft = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize); 267 if (fs2h32(dp->e2d_ino) > maxino || 268 reclen == 0 || 269 reclen > spaceleft || 270 (reclen & 0x3) != 0) 271 return (0); 272 if (dp->e2d_ino == 0) 273 return (1); 274 if (sblock.e2fs.e2fs_rev < E2FS_REV1 || 275 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE) == 0) 276 if (dp->e2d_type != 0) 277 return (1); 278 size = EXT2FS_DIRSIZ(dp->e2d_namlen); 279 if (reclen < size || 280 idesc->id_filesize < size /* || 281 dp->e2d_namlen > EXT2FS_MAXNAMLEN */) 282 return (0); 283 for (cp = dp->e2d_name, size = 0; size < dp->e2d_namlen; size++) 284 if (*cp == '\0' || (*cp++ == '/')) 285 return (0); 286 return (1); 287 } 288 289 void 290 direrror(ino_t ino, const char *errmesg) 291 { 292 293 fileerror(ino, ino, errmesg); 294 } 295 296 void 297 fileerror(ino_t cwd, ino_t ino, const char *errmesg) 298 { 299 struct ext2fs_dinode *dp; 300 char pathbuf[MAXPATHLEN + 1]; 301 302 pwarn("%s ", errmesg); 303 pinode(ino); 304 printf("\n"); 305 getpathname(pathbuf, sizeof(pathbuf), cwd, ino); 306 if ((ino < EXT2_FIRSTINO && ino != EXT2_ROOTINO) || ino > maxino) { 307 pfatal("NAME=%s\n", pathbuf); 308 return; 309 } 310 dp = ginode(ino); 311 if (ftypeok(dp)) 312 pfatal("%s=%s\n", 313 (fs2h16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf); 314 else 315 pfatal("NAME=%s\n", pathbuf); 316 } 317 318 void 319 adjust(struct inodesc *idesc, short lcnt) 320 { 321 struct ext2fs_dinode *dp; 322 323 dp = ginode(idesc->id_number); 324 if (fs2h16(dp->e2di_nlink) == lcnt) { 325 if (linkup(idesc->id_number, (ino_t)0) == 0) 326 clri(idesc, "UNREF", 0); 327 } else { 328 pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname : 329 ((fs2h16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE")); 330 pinode(idesc->id_number); 331 printf(" COUNT %d SHOULD BE %d", 332 fs2h16(dp->e2di_nlink), fs2h16(dp->e2di_nlink) - lcnt); 333 if (preen) { 334 if (lcnt < 0) { 335 printf("\n"); 336 pfatal("LINK COUNT INCREASING"); 337 } 338 printf(" (ADJUSTED)\n"); 339 } 340 if (preen || reply("ADJUST") == 1) { 341 dp->e2di_nlink = h2fs16(fs2h16(dp->e2di_nlink) - lcnt); 342 inodirty(); 343 } 344 } 345 } 346 347 static int 348 mkentry(struct inodesc *idesc) 349 { 350 struct ext2fs_direct *dirp = idesc->id_dirp; 351 struct ext2fs_direct newent; 352 int newlen, oldlen; 353 354 newent.e2d_type = 0; /* XXX gcc */ 355 newent.e2d_namlen = strlen(idesc->id_name); 356 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 357 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) 358 newent.e2d_type = inot2ext2dt(typemap[idesc->id_parent]); 359 newlen = EXT2FS_DIRSIZ(newent.e2d_namlen); 360 if (dirp->e2d_ino != 0) 361 oldlen = EXT2FS_DIRSIZ(dirp->e2d_namlen); 362 else 363 oldlen = 0; 364 if (fs2h16(dirp->e2d_reclen) - oldlen < newlen) 365 return (KEEPON); 366 newent.e2d_reclen = h2fs16(fs2h16(dirp->e2d_reclen) - oldlen); 367 dirp->e2d_reclen = h2fs16(oldlen); 368 dirp = (struct ext2fs_direct *)(((char *)dirp) + oldlen); 369 dirp->e2d_ino = h2fs32(idesc->id_parent); /* ino to be entered is in id_parent */ 370 dirp->e2d_reclen = newent.e2d_reclen; 371 dirp->e2d_namlen = newent.e2d_namlen; 372 dirp->e2d_type = newent.e2d_type; 373 memcpy(dirp->e2d_name, idesc->id_name, (size_t)(dirp->e2d_namlen)); 374 return (ALTERED|STOP); 375 } 376 377 static int 378 chgino(struct inodesc *idesc) 379 { 380 struct ext2fs_direct *dirp = idesc->id_dirp; 381 u_int16_t namlen = dirp->e2d_namlen; 382 383 if (strlen(idesc->id_name) != namlen || 384 strncmp(dirp->e2d_name, idesc->id_name, (int)namlen)) 385 return (KEEPON); 386 dirp->e2d_ino = h2fs32(idesc->id_parent); 387 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 388 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) 389 dirp->e2d_type = inot2ext2dt(typemap[idesc->id_parent]); 390 else 391 dirp->e2d_type = 0; 392 return (ALTERED|STOP); 393 } 394 395 int 396 linkup(ino_t orphan, ino_t parentdir) 397 { 398 struct ext2fs_dinode *dp; 399 int lostdir; 400 ino_t oldlfdir; 401 struct inodesc idesc; 402 char tempname[BUFSIZ]; 403 404 memset(&idesc, 0, sizeof(struct inodesc)); 405 dp = ginode(orphan); 406 lostdir = (fs2h16(dp->e2di_mode) & IFMT) == IFDIR; 407 pwarn("UNREF %s ", lostdir ? "DIR" : "FILE"); 408 pinode(orphan); 409 if (preen && inosize(dp) == 0) 410 return (0); 411 if (preen) 412 printf(" (RECONNECTED)\n"); 413 else 414 if (reply("RECONNECT") == 0) 415 return (0); 416 if (lfdir == 0) { 417 dp = ginode(EXT2_ROOTINO); 418 idesc.id_name = lfname; 419 idesc.id_type = DATA; 420 idesc.id_func = findino; 421 idesc.id_number = EXT2_ROOTINO; 422 if ((ckinode(dp, &idesc) & FOUND) != 0) { 423 lfdir = idesc.id_parent; 424 } else { 425 pwarn("NO lost+found DIRECTORY"); 426 if (preen || reply("CREATE")) { 427 lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode); 428 if (lfdir != 0) { 429 if (makeentry(EXT2_ROOTINO, lfdir, lfname) != 0) { 430 if (preen) 431 printf(" (CREATED)\n"); 432 } else { 433 freedir(lfdir, EXT2_ROOTINO); 434 lfdir = 0; 435 if (preen) 436 printf("\n"); 437 } 438 } 439 } 440 } 441 if (lfdir == 0) { 442 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY"); 443 printf("\n\n"); 444 return (0); 445 } 446 } 447 dp = ginode(lfdir); 448 if ((fs2h16(dp->e2di_mode) & IFMT) != IFDIR) { 449 pfatal("lost+found IS NOT A DIRECTORY"); 450 if (reply("REALLOCATE") == 0) 451 return (0); 452 oldlfdir = lfdir; 453 if ((lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode)) == 0) { 454 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n"); 455 return (0); 456 } 457 if ((changeino(EXT2_ROOTINO, lfname, lfdir) & ALTERED) == 0) { 458 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n"); 459 return (0); 460 } 461 inodirty(); 462 idesc.id_type = ADDR; 463 idesc.id_func = pass4check; 464 idesc.id_number = oldlfdir; 465 adjust(&idesc, lncntp[oldlfdir] + 1); 466 lncntp[oldlfdir] = 0; 467 dp = ginode(lfdir); 468 } 469 if (statemap[lfdir] != DFOUND) { 470 pfatal("SORRY. NO lost+found DIRECTORY\n\n"); 471 return (0); 472 } 473 (void)lftempname(tempname, orphan); 474 if (makeentry(lfdir, orphan, tempname) == 0) { 475 pfatal("SORRY. NO SPACE IN lost+found DIRECTORY"); 476 printf("\n\n"); 477 return (0); 478 } 479 lncntp[orphan]--; 480 if (lostdir) { 481 if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 && 482 parentdir != (ino_t)-1) 483 (void)makeentry(orphan, lfdir, ".."); 484 dp = ginode(lfdir); 485 dp->e2di_nlink = h2fs16(fs2h16(dp->e2di_nlink) +1); 486 inodirty(); 487 lncntp[lfdir]++; 488 pwarn("DIR I=%llu CONNECTED. ", (unsigned long long)orphan); 489 if (parentdir != (ino_t)-1) 490 printf("PARENT WAS I=%llu\n", 491 (unsigned long long)parentdir); 492 if (preen == 0) 493 printf("\n"); 494 } 495 return (1); 496 } 497 498 /* 499 * fix an entry in a directory. 500 */ 501 int 502 changeino(ino_t dir, const char *name, ino_t newnum) 503 { 504 struct inodesc idesc; 505 506 memset(&idesc, 0, sizeof(struct inodesc)); 507 idesc.id_type = DATA; 508 idesc.id_func = chgino; 509 idesc.id_number = dir; 510 idesc.id_fix = DONTKNOW; 511 idesc.id_name = name; 512 idesc.id_parent = newnum; /* new value for name */ 513 return (ckinode(ginode(dir), &idesc)); 514 } 515 516 /* 517 * make an entry in a directory 518 */ 519 int 520 makeentry(ino_t parent, ino_t ino, const char *name) 521 { 522 struct ext2fs_dinode *dp; 523 struct inodesc idesc; 524 char pathbuf[MAXPATHLEN + 1]; 525 526 if ((parent < EXT2_FIRSTINO && parent != EXT2_ROOTINO) 527 || parent >= maxino || 528 (ino < EXT2_FIRSTINO && ino < EXT2_ROOTINO) || ino >= maxino) 529 return (0); 530 memset(&idesc, 0, sizeof(struct inodesc)); 531 idesc.id_type = DATA; 532 idesc.id_func = mkentry; 533 idesc.id_number = parent; 534 idesc.id_parent = ino; /* this is the inode to enter */ 535 idesc.id_fix = DONTKNOW; 536 idesc.id_name = name; 537 dp = ginode(parent); 538 if (inosize(dp) % sblock.e2fs_bsize) { 539 inossize(dp, roundup(inosize(dp), sblock.e2fs_bsize)); 540 inodirty(); 541 } 542 if ((ckinode(dp, &idesc) & ALTERED) != 0) 543 return (1); 544 getpathname(pathbuf, sizeof(pathbuf), parent, parent); 545 dp = ginode(parent); 546 if (expanddir(dp, pathbuf) == 0) 547 return (0); 548 return (ckinode(dp, &idesc) & ALTERED); 549 } 550 551 /* 552 * Attempt to expand the size of a directory 553 */ 554 static int 555 expanddir(struct ext2fs_dinode *dp, char *name) 556 { 557 daddr_t lastbn, newblk; 558 struct bufarea *bp; 559 char *firstblk; 560 561 lastbn = ext2_lblkno(&sblock, inosize(dp)); 562 if (lastbn >= EXT2FS_NDADDR - 1 || fs2h32(dp->e2di_blocks[lastbn]) == 0 || 563 inosize(dp) == 0) { 564 return (0); 565 } 566 if ((newblk = allocblk()) == 0) { 567 return (0); 568 } 569 dp->e2di_blocks[lastbn + 1] = dp->e2di_blocks[lastbn]; 570 dp->e2di_blocks[lastbn] = h2fs32(newblk); 571 inossize(dp, inosize(dp) + sblock.e2fs_bsize); 572 inosnblock(dp, inonblock(dp) + btodb(sblock.e2fs_bsize)); 573 bp = getdirblk(fs2h32(dp->e2di_blocks[lastbn + 1]), 574 sblock.e2fs_bsize); 575 if (bp->b_errs) 576 goto bad; 577 if ((firstblk = malloc(sblock.e2fs_bsize)) == NULL) 578 err(8, "cannot allocate first block"); 579 memcpy(firstblk, bp->b_un.b_buf, sblock.e2fs_bsize); 580 bp = getdirblk(newblk, sblock.e2fs_bsize); 581 if (bp->b_errs) { 582 free(firstblk); 583 goto bad; 584 } 585 memcpy(bp->b_un.b_buf, firstblk, sblock.e2fs_bsize); 586 free(firstblk); 587 dirty(bp); 588 bp = getdirblk(fs2h32(dp->e2di_blocks[lastbn + 1]), 589 sblock.e2fs_bsize); 590 if (bp->b_errs) 591 goto bad; 592 emptydir.dot_reclen = h2fs16(sblock.e2fs_bsize); 593 memcpy(bp->b_un.b_buf, &emptydir, sizeof emptydir); 594 pwarn("NO SPACE LEFT IN %s", name); 595 if (preen) 596 printf(" (EXPANDED)\n"); 597 else if (reply("EXPAND") == 0) 598 goto bad; 599 dirty(bp); 600 inodirty(); 601 return (1); 602 bad: 603 dp->e2di_blocks[lastbn] = dp->e2di_blocks[lastbn + 1]; 604 dp->e2di_blocks[lastbn + 1] = 0; 605 inossize(dp, inosize(dp) - sblock.e2fs_bsize); 606 inosnblock(dp, inonblock(dp) - btodb(sblock.e2fs_bsize)); 607 freeblk(newblk); 608 return (0); 609 } 610 611 /* 612 * allocate a new directory 613 */ 614 int 615 allocdir(ino_t parent, ino_t request, int mode) 616 { 617 ino_t ino; 618 struct ext2fs_dinode *dp; 619 struct bufarea *bp; 620 struct ext2fs_dirtemplate *dirp; 621 622 ino = allocino(request, IFDIR|mode); 623 dirhead.dot_reclen = h2fs16(12); /* XXX */ 624 dirhead.dotdot_reclen = h2fs16(sblock.e2fs_bsize - 12); /* XXX */ 625 dirhead.dot_namlen = 1; 626 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 627 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) 628 dirhead.dot_type = EXT2_FT_DIR; 629 else 630 dirhead.dot_type = 0; 631 dirhead.dotdot_namlen = 2; 632 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 633 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) 634 dirhead.dotdot_type = EXT2_FT_DIR; 635 else 636 dirhead.dotdot_type = 0; 637 dirp = &dirhead; 638 dirp->dot_ino = h2fs32(ino); 639 dirp->dotdot_ino = h2fs32(parent); 640 dp = ginode(ino); 641 bp = getdirblk(fs2h32(dp->e2di_blocks[0]), sblock.e2fs_bsize); 642 if (bp->b_errs) { 643 freeino(ino); 644 return (0); 645 } 646 memcpy(bp->b_un.b_buf, dirp, sizeof(struct ext2fs_dirtemplate)); 647 dirty(bp); 648 dp->e2di_nlink = h2fs16(2); 649 inodirty(); 650 if (ino == EXT2_ROOTINO) { 651 lncntp[ino] = fs2h16(dp->e2di_nlink); 652 cacheino(dp, ino); 653 return(ino); 654 } 655 if (statemap[parent] != DSTATE && statemap[parent] != DFOUND) { 656 freeino(ino); 657 return (0); 658 } 659 cacheino(dp, ino); 660 statemap[ino] = statemap[parent]; 661 if (statemap[ino] == DSTATE) { 662 lncntp[ino] = fs2h16(dp->e2di_nlink); 663 lncntp[parent]++; 664 } 665 dp = ginode(parent); 666 dp->e2di_nlink = h2fs16(fs2h16(dp->e2di_nlink) + 1); 667 inodirty(); 668 return (ino); 669 } 670 671 /* 672 * free a directory inode 673 */ 674 static void 675 freedir(ino_t ino, ino_t parent) 676 { 677 struct ext2fs_dinode *dp; 678 679 if (ino != parent) { 680 dp = ginode(parent); 681 dp->e2di_nlink = h2fs16(fs2h16(dp->e2di_nlink) - 1); 682 inodirty(); 683 } 684 freeino(ino); 685 } 686 687 /* 688 * generate a temporary name for the lost+found directory. 689 */ 690 static int 691 lftempname(char *bufp, ino_t ino) 692 { 693 ino_t in; 694 char *cp; 695 int namlen; 696 697 cp = bufp + 2; 698 for (in = maxino; in > 0; in /= 10) 699 cp++; 700 *--cp = 0; 701 namlen = cp - bufp; 702 in = ino; 703 while (cp > bufp) { 704 *--cp = (in % 10) + '0'; 705 in /= 10; 706 } 707 *cp = '#'; 708 return (namlen); 709 } 710 711 /* 712 * Get a directory block. 713 * Insure that it is held until another is requested. 714 */ 715 static struct bufarea * 716 getdirblk(daddr_t blkno, long size) 717 { 718 719 if (pdirbp != 0) 720 pdirbp->b_flags &= ~B_INUSE; 721 pdirbp = getdatablk(blkno, size); 722 return (pdirbp); 723 } 724
Indexes created Sat Sep 20 22:09:52 GMT 2025