1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #if 0 33 #ifndef lint 34 static const char sccsid[] = "@(#)pass2.c 8.9 (Berkeley) 4/28/95"; 35 #endif /* not lint */ 36 #endif 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/sysctl.h> 42 43 #include <ufs/ufs/dinode.h> 44 #include <ufs/ufs/dir.h> 45 #include <ufs/ffs/fs.h> 46 47 #include <err.h> 48 #include <errno.h> 49 #include <stdint.h> 50 #include <string.h> 51 52 #include "fsck.h" 53 54 #define MINDIRSIZE (sizeof (struct dirtemplate)) 55 56 static int fix_extraneous(struct inoinfo *, struct inodesc *); 57 static int deleteentry(struct inodesc *); 58 static int blksort(const void *, const void *); 59 static int pass2check(struct inodesc *); 60 61 void 62 pass2(void) 63 { 64 struct inode ip; 65 union dinode *dp; 66 struct inoinfo **inpp, *inp; 67 struct inoinfo **inpend; 68 struct inodesc curino; 69 union dinode dino; 70 int i; 71 char pathbuf[MAXPATHLEN + 1]; 72 73 switch (inoinfo(UFS_ROOTINO)->ino_state) { 74 75 case USTATE: 76 pfatal("ROOT INODE UNALLOCATED"); 77 if (reply("ALLOCATE") == 0) { 78 ckfini(0); 79 exit(EEXIT); 80 } 81 if (allocdir(UFS_ROOTINO, UFS_ROOTINO, 0755) != UFS_ROOTINO) 82 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE"); 83 break; 84 85 case DCLEAR: 86 pfatal("DUPS/BAD IN ROOT INODE"); 87 if (reply("REALLOCATE")) { 88 freeino(UFS_ROOTINO); 89 if (allocdir(UFS_ROOTINO, UFS_ROOTINO, 0755) != 90 UFS_ROOTINO) 91 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE"); 92 break; 93 } 94 if (reply("CONTINUE") == 0) { 95 ckfini(0); 96 exit(EEXIT); 97 } 98 break; 99 100 case FSTATE: 101 case FCLEAR: 102 case FZLINK: 103 pfatal("ROOT INODE NOT DIRECTORY"); 104 if (reply("REALLOCATE")) { 105 freeino(UFS_ROOTINO); 106 if (allocdir(UFS_ROOTINO, UFS_ROOTINO, 0755) != 107 UFS_ROOTINO) 108 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE"); 109 break; 110 } 111 if (reply("FIX") == 0) { 112 ckfini(0); 113 exit(EEXIT); 114 } 115 ginode(UFS_ROOTINO, &ip); 116 dp = ip.i_dp; 117 DIP_SET(dp, di_mode, DIP(dp, di_mode) & ~IFMT); 118 DIP_SET(dp, di_mode, DIP(dp, di_mode) | IFDIR); 119 inodirty(&ip); 120 irelse(&ip); 121 break; 122 123 case DSTATE: 124 case DZLINK: 125 break; 126 127 default: 128 errx(EEXIT, "BAD STATE %d FOR ROOT INODE", 129 inoinfo(UFS_ROOTINO)->ino_state); 130 } 131 inoinfo(UFS_ROOTINO)->ino_state = DFOUND; 132 inoinfo(UFS_WINO)->ino_state = FSTATE; 133 inoinfo(UFS_WINO)->ino_type = DT_WHT; 134 /* 135 * Sort the directory list into disk block order. 136 */ 137 qsort((char *)inpsort, (size_t)inplast, sizeof *inpsort, blksort); 138 /* 139 * Check the integrity of each directory. 140 */ 141 memset(&curino, 0, sizeof(struct inodesc)); 142 curino.id_type = DATA; 143 curino.id_func = pass2check; 144 inpend = &inpsort[inplast]; 145 for (inpp = inpsort; inpp < inpend; inpp++) { 146 if (got_siginfo) { 147 printf("%s: phase 2: dir %td of %d (%d%%)\n", cdevname, 148 inpp - inpsort, (int)inplast, 149 (int)((inpp - inpsort) * 100 / inplast)); 150 got_siginfo = 0; 151 } 152 if (got_sigalarm) { 153 setproctitle("%s p2 %d%%", cdevname, 154 (int)((inpp - inpsort) * 100 / inplast)); 155 got_sigalarm = 0; 156 } 157 inp = *inpp; 158 if (inp->i_isize == 0) 159 continue; 160 if (inp->i_isize < MINDIRSIZE) { 161 direrror(inp->i_number, "DIRECTORY TOO SHORT"); 162 inp->i_isize = roundup(MINDIRSIZE, DIRBLKSIZ); 163 if (reply("FIX") == 1) { 164 ginode(inp->i_number, &ip); 165 DIP_SET(ip.i_dp, di_size, inp->i_isize); 166 inodirty(&ip); 167 irelse(&ip); 168 } 169 } else if ((inp->i_isize & (DIRBLKSIZ - 1)) != 0) { 170 getpathname(pathbuf, inp->i_number, inp->i_number); 171 if (usedsoftdep) 172 pfatal("%s %s: LENGTH %jd NOT MULTIPLE OF %d", 173 "DIRECTORY", pathbuf, 174 (intmax_t)inp->i_isize, DIRBLKSIZ); 175 else 176 pwarn("%s %s: LENGTH %jd NOT MULTIPLE OF %d", 177 "DIRECTORY", pathbuf, 178 (intmax_t)inp->i_isize, DIRBLKSIZ); 179 if (preen) 180 printf(" (ADJUSTED)\n"); 181 inp->i_isize = roundup(inp->i_isize, DIRBLKSIZ); 182 if (preen || reply("ADJUST") == 1) { 183 ginode(inp->i_number, &ip); 184 DIP_SET(ip.i_dp, di_size, 185 roundup(inp->i_isize, DIRBLKSIZ)); 186 inodirty(&ip); 187 irelse(&ip); 188 } 189 } 190 dp = &dino; 191 memset(dp, 0, sizeof(struct ufs2_dinode)); 192 DIP_SET(dp, di_mode, IFDIR); 193 DIP_SET(dp, di_size, inp->i_isize); 194 for (i = 0; i < MIN(inp->i_numblks, UFS_NDADDR); i++) 195 DIP_SET(dp, di_db[i], inp->i_blks[i]); 196 if (inp->i_numblks > UFS_NDADDR) 197 for (i = 0; i < UFS_NIADDR; i++) 198 DIP_SET(dp, di_ib[i], 199 inp->i_blks[UFS_NDADDR + i]); 200 curino.id_number = inp->i_number; 201 curino.id_parent = inp->i_parent; 202 (void)ckinode(dp, &curino); 203 } 204 /* 205 * Now that the parents of all directories have been found, 206 * make another pass to verify the value of `..' 207 */ 208 for (inpp = inpsort; inpp < inpend; inpp++) { 209 inp = *inpp; 210 if (inp->i_parent == 0 || inp->i_isize == 0) 211 continue; 212 if (inoinfo(inp->i_parent)->ino_state == DFOUND && 213 INO_IS_DUNFOUND(inp->i_number)) 214 inoinfo(inp->i_number)->ino_state = DFOUND; 215 if (inp->i_dotdot == inp->i_parent || 216 inp->i_dotdot == (ino_t)-1) 217 continue; 218 if (inp->i_dotdot == 0) { 219 inp->i_dotdot = inp->i_parent; 220 if (debug) 221 fileerror(inp->i_parent, inp->i_number, 222 "DEFERRED MISSING '..' FIX"); 223 (void)makeentry(inp->i_number, inp->i_parent, ".."); 224 inoinfo(inp->i_parent)->ino_linkcnt--; 225 continue; 226 } 227 /* 228 * Here we have: 229 * inp->i_number is directory with bad ".." in it. 230 * inp->i_dotdot is current value of "..". 231 * inp->i_parent is directory to which ".." should point. 232 */ 233 getpathname(pathbuf, inp->i_parent, inp->i_number); 234 printf("BAD INODE NUMBER FOR '..' in DIR I=%ju (%s)\n", 235 (uintmax_t)inp->i_number, pathbuf); 236 getpathname(pathbuf, inp->i_dotdot, inp->i_dotdot); 237 printf("CURRENTLY POINTS TO I=%ju (%s), ", 238 (uintmax_t)inp->i_dotdot, pathbuf); 239 getpathname(pathbuf, inp->i_parent, inp->i_parent); 240 printf("SHOULD POINT TO I=%ju (%s)", 241 (uintmax_t)inp->i_parent, pathbuf); 242 if (cursnapshot != 0) { 243 /* 244 * We need to: 245 * setcwd(inp->i_number); 246 * setdotdot(inp->i_dotdot, inp->i_parent); 247 */ 248 cmd.value = inp->i_number; 249 if (sysctlbyname("vfs.ffs.setcwd", 0, 0, 250 &cmd, sizeof cmd) == -1) { 251 /* kernel lacks support for these functions */ 252 printf(" (IGNORED)\n"); 253 continue; 254 } 255 cmd.value = inp->i_dotdot; /* verify same value */ 256 cmd.size = inp->i_parent; /* new parent */ 257 if (sysctlbyname("vfs.ffs.setdotdot", 0, 0, 258 &cmd, sizeof cmd) == -1) { 259 printf(" (FIX FAILED: %s)\n", strerror(errno)); 260 continue; 261 } 262 printf(" (FIXED)\n"); 263 inoinfo(inp->i_parent)->ino_linkcnt--; 264 inp->i_dotdot = inp->i_parent; 265 continue; 266 } 267 if (preen) 268 printf(" (FIXED)\n"); 269 else if (reply("FIX") == 0) 270 continue; 271 inoinfo(inp->i_dotdot)->ino_linkcnt++; 272 inoinfo(inp->i_parent)->ino_linkcnt--; 273 inp->i_dotdot = inp->i_parent; 274 (void)changeino(inp->i_number, "..", inp->i_parent); 275 } 276 /* 277 * Mark all the directories that can be found from the root. 278 */ 279 propagate(); 280 } 281 282 static int 283 pass2check(struct inodesc *idesc) 284 { 285 struct direct *dirp = idesc->id_dirp; 286 char dirname[MAXPATHLEN + 1]; 287 struct inoinfo *inp; 288 int n, entrysize, ret = 0; 289 struct inode ip; 290 union dinode *dp; 291 const char *errmsg; 292 struct direct proto, *newdirp; 293 294 /* 295 * check for "." 296 */ 297 if (dirp->d_ino > maxino) 298 goto chk2; 299 if (idesc->id_entryno != 0) 300 goto chk1; 301 if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") == 0) { 302 if (dirp->d_ino != idesc->id_number) { 303 direrror(idesc->id_number, "BAD INODE NUMBER FOR '.'"); 304 if (reply("FIX") == 1) { 305 dirp->d_ino = idesc->id_number; 306 ret |= ALTERED; 307 } 308 } 309 if (dirp->d_type != DT_DIR) { 310 direrror(idesc->id_number, "BAD TYPE VALUE FOR '.'"); 311 if (reply("FIX") == 1) { 312 dirp->d_type = DT_DIR; 313 ret |= ALTERED; 314 } 315 } 316 goto chk1; 317 } 318 proto.d_ino = idesc->id_number; 319 proto.d_type = DT_DIR; 320 proto.d_namlen = 1; 321 (void)strcpy(proto.d_name, "."); 322 entrysize = DIRSIZ(0, &proto); 323 direrror(idesc->id_number, "MISSING '.'"); 324 errmsg = "ADD '.' ENTRY"; 325 if (dirp->d_reclen < entrysize + DIRSIZ(0, dirp)) { 326 /* Not enough space to add '.', replace first entry with '.' */ 327 if (dirp->d_ino != 0) { 328 pwarn("\nFIRST ENTRY IN DIRECTORY CONTAINS %s\n", 329 dirp->d_name); 330 errmsg = "REPLACE WITH '.'"; 331 } 332 if (reply(errmsg) == 0) 333 goto chk1; 334 proto.d_reclen = dirp->d_reclen; 335 memmove(dirp, &proto, (size_t)entrysize); 336 ret |= ALTERED; 337 } else { 338 /* Move over first entry and add '.' entry */ 339 if (reply(errmsg) == 0) 340 goto chk1; 341 newdirp = (struct direct *)((char *)(dirp) + entrysize); 342 dirp->d_reclen -= entrysize; 343 memmove(newdirp, dirp, dirp->d_reclen); 344 proto.d_reclen = entrysize; 345 memmove(dirp, &proto, (size_t)entrysize); 346 idesc->id_entryno++; 347 inoinfo(idesc->id_number)->ino_linkcnt--; 348 dirp = newdirp; 349 ret |= ALTERED; 350 } 351 chk1: 352 if (idesc->id_entryno > 1) 353 goto chk2; 354 inp = getinoinfo(idesc->id_number); 355 proto.d_ino = inp->i_parent; 356 proto.d_type = DT_DIR; 357 proto.d_namlen = 2; 358 (void)strcpy(proto.d_name, ".."); 359 entrysize = DIRSIZ(0, &proto); 360 if (idesc->id_entryno == 0) { 361 n = DIRSIZ(0, dirp); 362 if (dirp->d_reclen < n + entrysize) 363 goto chk2; 364 proto.d_reclen = dirp->d_reclen - n; 365 dirp->d_reclen = n; 366 idesc->id_entryno++; 367 inoinfo(dirp->d_ino)->ino_linkcnt--; 368 dirp = (struct direct *)((char *)(dirp) + n); 369 memset(dirp, 0, (size_t)proto.d_reclen); 370 dirp->d_reclen = proto.d_reclen; 371 } 372 if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") == 0) { 373 inp->i_dotdot = dirp->d_ino; 374 if (dirp->d_type != DT_DIR) { 375 direrror(idesc->id_number, "BAD TYPE VALUE FOR '..'"); 376 dirp->d_type = DT_DIR; 377 if (reply("FIX") == 1) 378 ret |= ALTERED; 379 } 380 goto chk2; 381 } 382 fileerror(inp->i_parent != 0 ? inp->i_parent : idesc->id_number, 383 idesc->id_number, "MISSING '..'"); 384 errmsg = "ADD '..' ENTRY"; 385 if (dirp->d_reclen < entrysize + DIRSIZ(0, dirp)) { 386 /* No space to add '..', replace second entry with '..' */ 387 if (dirp->d_ino != 0) { 388 pfatal("SECOND ENTRY IN DIRECTORY CONTAINS %s\n", 389 dirp->d_name); 390 errmsg = "REPLACE WITH '..'"; 391 } 392 if (reply(errmsg) == 0) { 393 inp->i_dotdot = (ino_t)-1; 394 goto chk2; 395 } 396 if (proto.d_ino == 0) { 397 /* Defer processing until parent known */ 398 idesc->id_entryno++; 399 if (debug) 400 printf("(FIX DEFERRED)\n"); 401 } 402 inp->i_dotdot = proto.d_ino; 403 proto.d_reclen = dirp->d_reclen; 404 memmove(dirp, &proto, (size_t)entrysize); 405 ret |= ALTERED; 406 } else { 407 /* Move over second entry and add '..' entry */ 408 if (reply(errmsg) == 0) { 409 inp->i_dotdot = (ino_t)-1; 410 goto chk2; 411 } 412 if (proto.d_ino == 0) { 413 /* Defer processing until parent known */ 414 idesc->id_entryno++; 415 if (debug) 416 printf("(FIX DEFERRED)\n"); 417 } 418 inp->i_dotdot = proto.d_ino; 419 if (dirp->d_ino == 0) { 420 proto.d_reclen = dirp->d_reclen; 421 memmove(dirp, &proto, (size_t)entrysize); 422 } else { 423 newdirp = (struct direct *)((char *)(dirp) + entrysize); 424 dirp->d_reclen -= entrysize; 425 memmove(newdirp, dirp, dirp->d_reclen); 426 proto.d_reclen = entrysize; 427 memmove(dirp, &proto, (size_t)entrysize); 428 if (dirp->d_ino != 0) { 429 idesc->id_entryno++; 430 inoinfo(dirp->d_ino)->ino_linkcnt--; 431 } 432 dirp = newdirp; 433 } 434 ret |= ALTERED; 435 } 436 chk2: 437 if (dirp->d_ino == 0) 438 return (ret|KEEPON); 439 if (dirp->d_namlen <= 2 && 440 dirp->d_name[0] == '.' && 441 idesc->id_entryno >= 2) { 442 if (dirp->d_namlen == 1) { 443 direrror(idesc->id_number, "EXTRA '.' ENTRY"); 444 dirp->d_ino = 0; 445 if (reply("FIX") == 1) 446 ret |= ALTERED; 447 return (KEEPON | ret); 448 } 449 if (dirp->d_name[1] == '.') { 450 direrror(idesc->id_number, "EXTRA '..' ENTRY"); 451 dirp->d_ino = 0; 452 if (reply("FIX") == 1) 453 ret |= ALTERED; 454 return (KEEPON | ret); 455 } 456 } 457 idesc->id_entryno++; 458 n = 0; 459 if (dirp->d_ino > maxino) { 460 fileerror(idesc->id_number, dirp->d_ino, "I OUT OF RANGE"); 461 n = reply("REMOVE"); 462 } else if (((dirp->d_ino == UFS_WINO && dirp->d_type != DT_WHT) || 463 (dirp->d_ino != UFS_WINO && dirp->d_type == DT_WHT))) { 464 fileerror(idesc->id_number, dirp->d_ino, "BAD WHITEOUT ENTRY"); 465 dirp->d_ino = UFS_WINO; 466 dirp->d_type = DT_WHT; 467 if (reply("FIX") == 1) 468 ret |= ALTERED; 469 } else { 470 again: 471 switch (inoinfo(dirp->d_ino)->ino_state) { 472 case USTATE: 473 if (idesc->id_entryno <= 2) 474 break; 475 fileerror(idesc->id_number, dirp->d_ino, "UNALLOCATED"); 476 n = reply("REMOVE"); 477 break; 478 479 case DCLEAR: 480 case FCLEAR: 481 if (idesc->id_entryno <= 2) 482 break; 483 if (inoinfo(dirp->d_ino)->ino_state == FCLEAR) 484 errmsg = "DUP/BAD"; 485 else if (!preen && !usedsoftdep) 486 errmsg = "ZERO LENGTH DIRECTORY"; 487 else if (cursnapshot == 0) { 488 n = 1; 489 break; 490 } else { 491 getpathname(dirname, idesc->id_number, 492 dirp->d_ino); 493 pwarn("ZERO LENGTH DIRECTORY %s I=%ju", 494 dirname, (uintmax_t)dirp->d_ino); 495 /* 496 * We need to: 497 * setcwd(idesc->id_parent); 498 * rmdir(dirp->d_name); 499 */ 500 cmd.value = idesc->id_number; 501 if (sysctlbyname("vfs.ffs.setcwd", 0, 0, 502 &cmd, sizeof cmd) == -1) { 503 /* kernel lacks support */ 504 printf(" (IGNORED)\n"); 505 n = 1; 506 break; 507 } 508 if (rmdir(dirp->d_name) == -1) { 509 printf(" (REMOVAL FAILED: %s)\n", 510 strerror(errno)); 511 n = 1; 512 break; 513 } 514 /* ".." reference to parent is removed */ 515 inoinfo(idesc->id_number)->ino_linkcnt--; 516 printf(" (REMOVED)\n"); 517 break; 518 } 519 fileerror(idesc->id_number, dirp->d_ino, errmsg); 520 if ((n = reply("REMOVE")) == 1) 521 break; 522 ginode(dirp->d_ino, &ip); 523 dp = ip.i_dp; 524 inoinfo(dirp->d_ino)->ino_state = 525 (DIP(dp, di_mode) & IFMT) == IFDIR ? DSTATE : FSTATE; 526 inoinfo(dirp->d_ino)->ino_linkcnt = DIP(dp, di_nlink); 527 irelse(&ip); 528 goto again; 529 530 case DSTATE: 531 case DZLINK: 532 if (inoinfo(idesc->id_number)->ino_state == DFOUND) 533 inoinfo(dirp->d_ino)->ino_state = DFOUND; 534 /* FALLTHROUGH */ 535 536 case DFOUND: 537 inp = getinoinfo(dirp->d_ino); 538 if (idesc->id_entryno > 2) { 539 if (inp->i_parent == 0) 540 inp->i_parent = idesc->id_number; 541 else if ((n = fix_extraneous(inp, idesc)) == 1) 542 break; 543 } 544 /* FALLTHROUGH */ 545 546 case FSTATE: 547 case FZLINK: 548 if (dirp->d_type != inoinfo(dirp->d_ino)->ino_type) { 549 fileerror(idesc->id_number, dirp->d_ino, 550 "BAD TYPE VALUE"); 551 dirp->d_type = inoinfo(dirp->d_ino)->ino_type; 552 if (reply("FIX") == 1) 553 ret |= ALTERED; 554 } 555 inoinfo(dirp->d_ino)->ino_linkcnt--; 556 break; 557 558 default: 559 errx(EEXIT, "BAD STATE %d FOR INODE I=%ju", 560 inoinfo(dirp->d_ino)->ino_state, 561 (uintmax_t)dirp->d_ino); 562 } 563 } 564 if (n == 0) 565 return (ret|KEEPON); 566 dirp->d_ino = 0; 567 return (ret|KEEPON|ALTERED); 568 } 569 570 static int 571 fix_extraneous(struct inoinfo *inp, struct inodesc *idesc) 572 { 573 char *cp; 574 struct inode ip; 575 struct inodesc dotdesc; 576 char oldname[MAXPATHLEN + 1]; 577 char newname[MAXPATHLEN + 1]; 578 579 /* 580 * If we have not yet found "..", look it up now so we know 581 * which inode the directory itself believes is its parent. 582 */ 583 if (inp->i_dotdot == 0) { 584 memset(&dotdesc, 0, sizeof(struct inodesc)); 585 dotdesc.id_type = DATA; 586 dotdesc.id_number = idesc->id_dirp->d_ino; 587 dotdesc.id_func = findino; 588 dotdesc.id_name = strdup(".."); 589 ginode(dotdesc.id_number, &ip); 590 if ((ckinode(ip.i_dp, &dotdesc) & FOUND)) 591 inp->i_dotdot = dotdesc.id_parent; 592 irelse(&ip); 593 } 594 /* 595 * We have the previously found old name (inp->i_parent) and the 596 * just found new name (idesc->id_number). We have five cases: 597 * 1) ".." is missing - can remove either name, choose to delete 598 * new one and let fsck create ".." pointing to old name. 599 * 2) Both new and old are in same directory, choose to delete 600 * the new name and let fsck fix ".." if it is wrong. 601 * 3) ".." does not point to the new name, so delete it and let 602 * fsck fix ".." to point to the old one if it is wrong. 603 * 4) ".." points to the old name only, so delete the new one. 604 * 5) ".." points to the new name only, so delete the old one. 605 * 606 * For cases 1-4 we eliminate the new name; 607 * for case 5 we eliminate the old name. 608 */ 609 if (inp->i_dotdot == 0 || /* Case 1 */ 610 idesc->id_number == inp->i_parent || /* Case 2 */ 611 inp->i_dotdot != idesc->id_number || /* Case 3 */ 612 inp->i_dotdot == inp->i_parent) { /* Case 4 */ 613 getpathname(newname, idesc->id_number, idesc->id_number); 614 if (strcmp(newname, "/") != 0) 615 strcat (newname, "/"); 616 strcat(newname, idesc->id_dirp->d_name); 617 getpathname(oldname, inp->i_number, inp->i_number); 618 pwarn("%s IS AN EXTRANEOUS HARD LINK TO DIRECTORY %s", 619 newname, oldname); 620 if (cursnapshot != 0) { 621 /* 622 * We need to 623 * setcwd(idesc->id_number); 624 * unlink(idesc->id_dirp->d_name); 625 */ 626 cmd.value = idesc->id_number; 627 if (sysctlbyname("vfs.ffs.setcwd", 0, 0, 628 &cmd, sizeof cmd) == -1) { 629 printf(" (IGNORED)\n"); 630 return (0); 631 } 632 cmd.value = (intptr_t)idesc->id_dirp->d_name; 633 cmd.size = inp->i_number; /* verify same name */ 634 if (sysctlbyname("vfs.ffs.unlink", 0, 0, 635 &cmd, sizeof cmd) == -1) { 636 printf(" (UNLINK FAILED: %s)\n", 637 strerror(errno)); 638 return (0); 639 } 640 printf(" (REMOVED)\n"); 641 return (0); 642 } 643 if (preen) { 644 printf(" (REMOVED)\n"); 645 return (1); 646 } 647 return (reply("REMOVE")); 648 } 649 /* 650 * None of the first four cases above, so must be case (5). 651 * Eliminate the old name and make the new the name the parent. 652 */ 653 getpathname(oldname, inp->i_parent, inp->i_number); 654 getpathname(newname, inp->i_number, inp->i_number); 655 pwarn("%s IS AN EXTRANEOUS HARD LINK TO DIRECTORY %s", oldname, 656 newname); 657 if (cursnapshot != 0) { 658 /* 659 * We need to 660 * setcwd(inp->i_parent); 661 * unlink(last component of oldname pathname); 662 */ 663 cmd.value = inp->i_parent; 664 if (sysctlbyname("vfs.ffs.setcwd", 0, 0, 665 &cmd, sizeof cmd) == -1) { 666 printf(" (IGNORED)\n"); 667 return (0); 668 } 669 if ((cp = strchr(oldname, '/')) == NULL) { 670 printf(" (IGNORED)\n"); 671 return (0); 672 } 673 cmd.value = (intptr_t)(cp + 1); 674 cmd.size = inp->i_number; /* verify same name */ 675 if (sysctlbyname("vfs.ffs.unlink", 0, 0, 676 &cmd, sizeof cmd) == -1) { 677 printf(" (UNLINK FAILED: %s)\n", 678 strerror(errno)); 679 return (0); 680 } 681 printf(" (REMOVED)\n"); 682 inp->i_parent = idesc->id_number; /* reparent to correct dir */ 683 return (0); 684 } 685 if (!preen && !reply("REMOVE")) 686 return (0); 687 memset(&dotdesc, 0, sizeof(struct inodesc)); 688 dotdesc.id_type = DATA; 689 dotdesc.id_number = inp->i_parent; /* directory in which name appears */ 690 dotdesc.id_parent = inp->i_number; /* inode number in entry to delete */ 691 dotdesc.id_func = deleteentry; 692 ginode(dotdesc.id_number, &ip); 693 if ((ckinode(ip.i_dp, &dotdesc) & FOUND) && preen) 694 printf(" (REMOVED)\n"); 695 irelse(&ip); 696 inp->i_parent = idesc->id_number; /* reparent to correct directory */ 697 inoinfo(inp->i_number)->ino_linkcnt++; /* name gone, return reference */ 698 return (0); 699 } 700 701 static int 702 deleteentry(struct inodesc *idesc) 703 { 704 struct direct *dirp = idesc->id_dirp; 705 706 if (idesc->id_entryno++ < 2 || dirp->d_ino != idesc->id_parent) 707 return (KEEPON); 708 dirp->d_ino = 0; 709 return (ALTERED|STOP|FOUND); 710 } 711 712 /* 713 * Routine to sort disk blocks. 714 */ 715 static int 716 blksort(const void *arg1, const void *arg2) 717 { 718 719 return ((*(struct inoinfo * const *)arg1)->i_blks[0] - 720 (*(struct inoinfo * const *)arg2)->i_blks[0]); 721 } 722