pass2.c revision 126345
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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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#if 0 35#ifndef lint 36static const char sccsid[] = "@(#)pass2.c 8.9 (Berkeley) 4/28/95"; 37#endif /* not lint */ 38#endif 39#include <sys/cdefs.h> 40__FBSDID("$FreeBSD: head/sbin/fsck_ffs/pass2.c 126345 2004-02-28 07:50:42Z scottl $"); 41 42#include <sys/param.h> 43 44#include <ufs/ufs/dinode.h> 45#include <ufs/ufs/dir.h> 46#include <ufs/ffs/fs.h> 47 48#include <err.h> 49#include <stdint.h> 50#include <string.h> 51 52#include "fsck.h" 53 54#define MINDIRSIZE (sizeof (struct dirtemplate)) 55 56static int blksort(const void *, const void *); 57static int pass2check(struct inodesc *); 58 59void 60pass2(void) 61{ 62 union dinode *dp; 63 struct inoinfo **inpp, *inp; 64 struct inoinfo **inpend; 65 struct inodesc curino; 66 union dinode dino; 67 int i; 68 char pathbuf[MAXPATHLEN + 1]; 69 70 switch (inoinfo(ROOTINO)->ino_state) { 71 72 case USTATE: 73 pfatal("ROOT INODE UNALLOCATED"); 74 if (reply("ALLOCATE") == 0) { 75 ckfini(0); 76 exit(EEXIT); 77 } 78 if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO) 79 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE"); 80 break; 81 82 case DCLEAR: 83 pfatal("DUPS/BAD IN ROOT INODE"); 84 if (reply("REALLOCATE")) { 85 freeino(ROOTINO); 86 if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO) 87 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE"); 88 break; 89 } 90 if (reply("CONTINUE") == 0) { 91 ckfini(0); 92 exit(EEXIT); 93 } 94 break; 95 96 case FSTATE: 97 case FCLEAR: 98 pfatal("ROOT INODE NOT DIRECTORY"); 99 if (reply("REALLOCATE")) { 100 freeino(ROOTINO); 101 if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO) 102 errx(EEXIT, "CANNOT ALLOCATE ROOT INODE"); 103 break; 104 } 105 if (reply("FIX") == 0) { 106 ckfini(0); 107 exit(EEXIT); 108 } 109 dp = ginode(ROOTINO); 110 DIP(dp, di_mode) &= ~IFMT; 111 DIP(dp, di_mode) |= IFDIR; 112 inodirty(); 113 break; 114 115 case DSTATE: 116 break; 117 118 default: 119 errx(EEXIT, "BAD STATE %d FOR ROOT INODE", 120 inoinfo(ROOTINO)->ino_state); 121 } 122 inoinfo(ROOTINO)->ino_state = DFOUND; 123 inoinfo(WINO)->ino_state = FSTATE; 124 inoinfo(WINO)->ino_type = DT_WHT; 125 /* 126 * Sort the directory list into disk block order. 127 */ 128 qsort((char *)inpsort, (size_t)inplast, sizeof *inpsort, blksort); 129 /* 130 * Check the integrity of each directory. 131 */ 132 memset(&curino, 0, sizeof(struct inodesc)); 133 curino.id_type = DATA; 134 curino.id_func = pass2check; 135 inpend = &inpsort[inplast]; 136 for (inpp = inpsort; inpp < inpend; inpp++) { 137 if (got_siginfo) { 138 printf("%s: phase 2: dir %td of %d (%d%%)\n", cdevname, 139 inpp - inpsort, (int)inplast, 140 (int)((inpp - inpsort) * 100 / inplast)); 141 got_siginfo = 0; 142 } 143 if (got_sigalarm) { 144 setproctitle("%s p2 %d%%", cdevname, 145 (int)((inpp - inpsort) * 100 / inplast)); 146 got_sigalarm = 0; 147 } 148 inp = *inpp; 149 if (inp->i_isize == 0) 150 continue; 151 if (inp->i_isize < MINDIRSIZE) { 152 direrror(inp->i_number, "DIRECTORY TOO SHORT"); 153 inp->i_isize = roundup(MINDIRSIZE, DIRBLKSIZ); 154 if (reply("FIX") == 1) { 155 dp = ginode(inp->i_number); 156 DIP(dp, di_size) = inp->i_isize; 157 inodirty(); 158 } 159 } else if ((inp->i_isize & (DIRBLKSIZ - 1)) != 0) { 160 getpathname(pathbuf, inp->i_number, inp->i_number); 161 if (usedsoftdep) 162 pfatal("%s %s: LENGTH %jd NOT MULTIPLE OF %d", 163 "DIRECTORY", pathbuf, 164 (intmax_t)inp->i_isize, DIRBLKSIZ); 165 else 166 pwarn("%s %s: LENGTH %jd NOT MULTIPLE OF %d", 167 "DIRECTORY", pathbuf, 168 (intmax_t)inp->i_isize, DIRBLKSIZ); 169 if (preen) 170 printf(" (ADJUSTED)\n"); 171 inp->i_isize = roundup(inp->i_isize, DIRBLKSIZ); 172 if (preen || reply("ADJUST") == 1) { 173 dp = ginode(inp->i_number); 174 DIP(dp, di_size) = 175 roundup(inp->i_isize, DIRBLKSIZ); 176 inodirty(); 177 } 178 } 179 dp = &dino; 180 memset(dp, 0, sizeof(struct ufs2_dinode)); 181 DIP(dp, di_mode) = IFDIR; 182 DIP(dp, di_size) = inp->i_isize; 183 for (i = 0; 184 i < (inp->i_numblks<NDADDR ? inp->i_numblks : NDADDR); 185 i++) 186 DIP(dp, di_db[i]) = inp->i_blks[i]; 187 if (inp->i_numblks > NDADDR) 188 for (i = 0; i < NIADDR; i++) 189 DIP(dp, di_ib[i]) = inp->i_blks[NDADDR + i]; 190 curino.id_number = inp->i_number; 191 curino.id_parent = inp->i_parent; 192 (void)ckinode(dp, &curino); 193 } 194 /* 195 * Now that the parents of all directories have been found, 196 * make another pass to verify the value of `..' 197 */ 198 for (inpp = inpsort; inpp < inpend; inpp++) { 199 inp = *inpp; 200 if (inp->i_parent == 0 || inp->i_isize == 0) 201 continue; 202 if (inoinfo(inp->i_parent)->ino_state == DFOUND && 203 inoinfo(inp->i_number)->ino_state == DSTATE) 204 inoinfo(inp->i_number)->ino_state = DFOUND; 205 if (inp->i_dotdot == inp->i_parent || 206 inp->i_dotdot == (ino_t)-1) 207 continue; 208 if (inp->i_dotdot == 0) { 209 inp->i_dotdot = inp->i_parent; 210 fileerror(inp->i_parent, inp->i_number, "MISSING '..'"); 211 if (reply("FIX") == 0) 212 continue; 213 (void)makeentry(inp->i_number, inp->i_parent, ".."); 214 inoinfo(inp->i_parent)->ino_linkcnt--; 215 continue; 216 } 217 fileerror(inp->i_parent, inp->i_number, 218 "BAD INODE NUMBER FOR '..'"); 219 if (reply("FIX") == 0) 220 continue; 221 inoinfo(inp->i_dotdot)->ino_linkcnt++; 222 inoinfo(inp->i_parent)->ino_linkcnt--; 223 inp->i_dotdot = inp->i_parent; 224 (void)changeino(inp->i_number, "..", inp->i_parent); 225 } 226 /* 227 * Mark all the directories that can be found from the root. 228 */ 229 propagate(); 230} 231 232static int 233pass2check(struct inodesc *idesc) 234{ 235 struct direct *dirp = idesc->id_dirp; 236 struct inoinfo *inp; 237 int n, entrysize, ret = 0; 238 union dinode *dp; 239 const char *errmsg; 240 struct direct proto; 241 char namebuf[MAXPATHLEN + 1]; 242 char pathbuf[MAXPATHLEN + 1]; 243 244 /* 245 * check for "." 246 */ 247 if (idesc->id_entryno != 0) 248 goto chk1; 249 if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") == 0) { 250 if (dirp->d_ino != idesc->id_number) { 251 direrror(idesc->id_number, "BAD INODE NUMBER FOR '.'"); 252 dirp->d_ino = idesc->id_number; 253 if (reply("FIX") == 1) 254 ret |= ALTERED; 255 } 256 if (dirp->d_type != DT_DIR) { 257 direrror(idesc->id_number, "BAD TYPE VALUE FOR '.'"); 258 dirp->d_type = DT_DIR; 259 if (reply("FIX") == 1) 260 ret |= ALTERED; 261 } 262 goto chk1; 263 } 264 direrror(idesc->id_number, "MISSING '.'"); 265 proto.d_ino = idesc->id_number; 266 proto.d_type = DT_DIR; 267 proto.d_namlen = 1; 268 (void)strcpy(proto.d_name, "."); 269 entrysize = DIRSIZ(0, &proto); 270 if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") != 0) { 271 pfatal("CANNOT FIX, FIRST ENTRY IN DIRECTORY CONTAINS %s\n", 272 dirp->d_name); 273 } else if (dirp->d_reclen < entrysize) { 274 pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '.'\n"); 275 } else if (dirp->d_reclen < 2 * entrysize) { 276 proto.d_reclen = dirp->d_reclen; 277 memmove(dirp, &proto, (size_t)entrysize); 278 if (reply("FIX") == 1) 279 ret |= ALTERED; 280 } else { 281 n = dirp->d_reclen - entrysize; 282 proto.d_reclen = entrysize; 283 memmove(dirp, &proto, (size_t)entrysize); 284 idesc->id_entryno++; 285 inoinfo(dirp->d_ino)->ino_linkcnt--; 286 dirp = (struct direct *)((char *)(dirp) + entrysize); 287 memset(dirp, 0, (size_t)n); 288 dirp->d_reclen = n; 289 if (reply("FIX") == 1) 290 ret |= ALTERED; 291 } 292chk1: 293 if (idesc->id_entryno > 1) 294 goto chk2; 295 inp = getinoinfo(idesc->id_number); 296 proto.d_ino = inp->i_parent; 297 proto.d_type = DT_DIR; 298 proto.d_namlen = 2; 299 (void)strcpy(proto.d_name, ".."); 300 entrysize = DIRSIZ(0, &proto); 301 if (idesc->id_entryno == 0) { 302 n = DIRSIZ(0, dirp); 303 if (dirp->d_reclen < n + entrysize) 304 goto chk2; 305 proto.d_reclen = dirp->d_reclen - n; 306 dirp->d_reclen = n; 307 idesc->id_entryno++; 308 inoinfo(dirp->d_ino)->ino_linkcnt--; 309 dirp = (struct direct *)((char *)(dirp) + n); 310 memset(dirp, 0, (size_t)proto.d_reclen); 311 dirp->d_reclen = proto.d_reclen; 312 } 313 if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") == 0) { 314 inp->i_dotdot = dirp->d_ino; 315 if (dirp->d_type != DT_DIR) { 316 direrror(idesc->id_number, "BAD TYPE VALUE FOR '..'"); 317 dirp->d_type = DT_DIR; 318 if (reply("FIX") == 1) 319 ret |= ALTERED; 320 } 321 goto chk2; 322 } 323 if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") != 0) { 324 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'"); 325 pfatal("CANNOT FIX, SECOND ENTRY IN DIRECTORY CONTAINS %s\n", 326 dirp->d_name); 327 inp->i_dotdot = (ino_t)-1; 328 } else if (dirp->d_reclen < entrysize) { 329 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'"); 330 pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '..'\n"); 331 inp->i_dotdot = (ino_t)-1; 332 } else if (inp->i_parent != 0) { 333 /* 334 * We know the parent, so fix now. 335 */ 336 inp->i_dotdot = inp->i_parent; 337 fileerror(inp->i_parent, idesc->id_number, "MISSING '..'"); 338 proto.d_reclen = dirp->d_reclen; 339 memmove(dirp, &proto, (size_t)entrysize); 340 if (reply("FIX") == 1) 341 ret |= ALTERED; 342 } 343 idesc->id_entryno++; 344 if (dirp->d_ino != 0) 345 inoinfo(dirp->d_ino)->ino_linkcnt--; 346 return (ret|KEEPON); 347chk2: 348 if (dirp->d_ino == 0) 349 return (ret|KEEPON); 350 if (dirp->d_namlen <= 2 && 351 dirp->d_name[0] == '.' && 352 idesc->id_entryno >= 2) { 353 if (dirp->d_namlen == 1) { 354 direrror(idesc->id_number, "EXTRA '.' ENTRY"); 355 dirp->d_ino = 0; 356 if (reply("FIX") == 1) 357 ret |= ALTERED; 358 return (KEEPON | ret); 359 } 360 if (dirp->d_name[1] == '.') { 361 direrror(idesc->id_number, "EXTRA '..' ENTRY"); 362 dirp->d_ino = 0; 363 if (reply("FIX") == 1) 364 ret |= ALTERED; 365 return (KEEPON | ret); 366 } 367 } 368 idesc->id_entryno++; 369 n = 0; 370 if (dirp->d_ino > maxino) { 371 fileerror(idesc->id_number, dirp->d_ino, "I OUT OF RANGE"); 372 n = reply("REMOVE"); 373 } else if (((dirp->d_ino == WINO && dirp->d_type != DT_WHT) || 374 (dirp->d_ino != WINO && dirp->d_type == DT_WHT))) { 375 fileerror(idesc->id_number, dirp->d_ino, "BAD WHITEOUT ENTRY"); 376 dirp->d_ino = WINO; 377 dirp->d_type = DT_WHT; 378 if (reply("FIX") == 1) 379 ret |= ALTERED; 380 } else { 381again: 382 switch (inoinfo(dirp->d_ino)->ino_state) { 383 case USTATE: 384 if (idesc->id_entryno <= 2) 385 break; 386 fileerror(idesc->id_number, dirp->d_ino, "UNALLOCATED"); 387 n = reply("REMOVE"); 388 break; 389 390 case DCLEAR: 391 case FCLEAR: 392 if (idesc->id_entryno <= 2) 393 break; 394 if (inoinfo(dirp->d_ino)->ino_state == FCLEAR) 395 errmsg = "DUP/BAD"; 396 else if (!preen && !usedsoftdep) 397 errmsg = "ZERO LENGTH DIRECTORY"; 398 else { 399 n = 1; 400 break; 401 } 402 fileerror(idesc->id_number, dirp->d_ino, errmsg); 403 if ((n = reply("REMOVE")) == 1) 404 break; 405 dp = ginode(dirp->d_ino); 406 inoinfo(dirp->d_ino)->ino_state = 407 (DIP(dp, di_mode) & IFMT) == IFDIR ? DSTATE : FSTATE; 408 inoinfo(dirp->d_ino)->ino_linkcnt = DIP(dp, di_nlink); 409 goto again; 410 411 case DSTATE: 412 if (inoinfo(idesc->id_number)->ino_state == DFOUND) 413 inoinfo(dirp->d_ino)->ino_state = DFOUND; 414 /* FALLTHROUGH */ 415 416 case DFOUND: 417 inp = getinoinfo(dirp->d_ino); 418 if (inp->i_parent != 0 && idesc->id_entryno > 2) { 419 getpathname(pathbuf, idesc->id_number, 420 idesc->id_number); 421 getpathname(namebuf, dirp->d_ino, dirp->d_ino); 422 pwarn("%s%s%s %s %s\n", pathbuf, 423 (strcmp(pathbuf, "/") == 0 ? "" : "/"), 424 dirp->d_name, 425 "IS AN EXTRANEOUS HARD LINK TO DIRECTORY", 426 namebuf); 427 if (cursnapshot != 0) 428 break; 429 if (preen) { 430 printf(" (REMOVED)\n"); 431 n = 1; 432 break; 433 } 434 if ((n = reply("REMOVE")) == 1) 435 break; 436 } 437 if (idesc->id_entryno > 2) 438 inp->i_parent = idesc->id_number; 439 /* FALLTHROUGH */ 440 441 case FSTATE: 442 if (dirp->d_type != inoinfo(dirp->d_ino)->ino_type) { 443 fileerror(idesc->id_number, dirp->d_ino, 444 "BAD TYPE VALUE"); 445 dirp->d_type = inoinfo(dirp->d_ino)->ino_type; 446 if (reply("FIX") == 1) 447 ret |= ALTERED; 448 } 449 inoinfo(dirp->d_ino)->ino_linkcnt--; 450 break; 451 452 default: 453 errx(EEXIT, "BAD STATE %d FOR INODE I=%d", 454 inoinfo(dirp->d_ino)->ino_state, dirp->d_ino); 455 } 456 } 457 if (n == 0) 458 return (ret|KEEPON); 459 dirp->d_ino = 0; 460 return (ret|KEEPON|ALTERED); 461} 462 463/* 464 * Routine to sort disk blocks. 465 */ 466static int 467blksort(const void *arg1, const void *arg2) 468{ 469 470 return ((*(struct inoinfo * const *)arg1)->i_blks[0] - 471 (*(struct inoinfo * const *)arg2)->i_blks[0]); 472} 473