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pass2.c revision 1.46.2.1
      1 /*	$NetBSD: pass2.c,v 1.46.2.1 2011/06/23 14:18:42 cherry 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 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)pass2.c	8.9 (Berkeley) 4/28/95";
     36 #else
     37 __RCSID("$NetBSD: pass2.c,v 1.46.2.1 2011/06/23 14:18:42 cherry Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <sys/param.h>
     42 #include <sys/time.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 <stdio.h>
     50 #include <stdlib.h>
     51 #include <string.h>
     52 
     53 #include "fsck.h"
     54 #include "fsutil.h"
     55 #include "extern.h"
     56 #include "exitvalues.h"
     57 
     58 #define MINDIRSIZE	(sizeof (struct dirtemplate))
     59 
     60 static int blksort(const void *, const void *);
     61 static int pass2check(struct inodesc *);
     62 
     63 void
     64 pass2(void)
     65 {
     66 	union dinode *dp;
     67 	struct inoinfo **inpp, *inp, *pinp;
     68 	struct inoinfo **inpend;
     69 	struct inostat *rinfo, *info;
     70 	struct inodesc curino;
     71 	union dinode dino;
     72 	int i, maxblk;
     73 	char pathbuf[MAXPATHLEN + 1];
     74 
     75 	rinfo = inoinfo(ROOTINO);
     76 	switch (rinfo->ino_state) {
     77 
     78 	case USTATE:
     79 		pfatal("ROOT INODE UNALLOCATED");
     80 		if (reply("ALLOCATE") == 0) {
     81 			markclean = 0;
     82 			ckfini(1);
     83 			exit(FSCK_EXIT_CHECK_FAILED);
     84 		}
     85 		if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
     86 			errexit("CANNOT ALLOCATE ROOT INODE");
     87 		break;
     88 
     89 	case DCLEAR:
     90 		pfatal("DUPS/BAD IN ROOT INODE");
     91 		if (reply("REALLOCATE")) {
     92 			freeino(ROOTINO);
     93 			if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
     94 				errexit("CANNOT ALLOCATE ROOT INODE");
     95 			break;
     96 		}
     97 		markclean = 0;
     98 		if (reply("CONTINUE") == 0) {
     99 			ckfini(1);
    100 			exit(FSCK_EXIT_CHECK_FAILED);
    101 		}
    102 		break;
    103 
    104 	case FSTATE:
    105 	case FCLEAR:
    106 		pfatal("ROOT INODE NOT DIRECTORY");
    107 		if (reply("REALLOCATE")) {
    108 			freeino(ROOTINO);
    109 			if (allocdir(ROOTINO, ROOTINO, 0755) != ROOTINO)
    110 				errexit("CANNOT ALLOCATE ROOT INODE");
    111 			break;
    112 		}
    113 		if (reply("FIX") == 0) {
    114 			markclean = 0;
    115 			ckfini(1);
    116 			exit(FSCK_EXIT_CHECK_FAILED);
    117 		}
    118 		dp = ginode(ROOTINO);
    119 		DIP_SET(dp, mode,
    120 		    iswap16((iswap16(DIP(dp, mode)) & ~IFMT) | IFDIR));
    121 		inodirty();
    122 		break;
    123 
    124 	case DSTATE:
    125 		break;
    126 
    127 	default:
    128 		errexit("BAD STATE %d FOR ROOT INODE", rinfo->ino_state);
    129 	}
    130 	if (newinofmt) {
    131 		info = inoinfo(WINO);
    132 		info->ino_state = FSTATE;
    133 		info->ino_type = DT_WHT;
    134 	}
    135 	/*
    136 	 * Sort the directory list into disk block order.
    137 	 */
    138 	qsort((char *)inpsort, (size_t)inplast, sizeof *inpsort, blksort);
    139 	/*
    140 	 * Check the integrity of each directory.
    141 	 */
    142 	memset(&curino, 0, sizeof(struct inodesc));
    143 	curino.id_type = DATA;
    144 	curino.id_func = pass2check;
    145 	inpend = &inpsort[inplast];
    146 	for (inpp = inpsort; inpp < inpend; inpp++) {
    147 		if (got_siginfo) {
    148 			fprintf(stderr,
    149 			    "%s: phase 2: dir %ld of %d (%d%%)\n", cdevname(),
    150 			    (long)(inpp - inpsort), (int)inplast,
    151 			    (int)((inpp - inpsort) * 100 / inplast));
    152 			got_siginfo = 0;
    153 		}
    154 #ifdef PROGRESS
    155 		progress_bar(cdevname(), preen ? NULL : "phase 2",
    156 			    (inpp - inpsort), inplast);
    157 #endif /* PROGRESS */
    158 		inp = *inpp;
    159 		if (inp->i_isize == 0)
    160 			continue;
    161 		if (inp->i_isize < MINDIRSIZE) {
    162 			direrror(inp->i_number, "DIRECTORY TOO SHORT");
    163 			inp->i_isize = roundup(MINDIRSIZE, dirblksiz);
    164 			if (reply("FIX") == 1) {
    165 				dp = ginode(inp->i_number);
    166 				DIP_SET(dp, size, iswap64(inp->i_isize));
    167 				inodirty();
    168 			} else
    169 				markclean = 0;
    170 		} else if ((inp->i_isize & (dirblksiz - 1)) != 0) {
    171 			getpathname(pathbuf, sizeof(pathbuf), inp->i_number,
    172 			    inp->i_number);
    173 			if (usedsoftdep)
    174 				pfatal("%s %s: LENGTH %lld NOT MULTIPLE OF %d",
    175 					"DIRECTORY", pathbuf,
    176 					(long long)inp->i_isize, dirblksiz);
    177 			else
    178 				pwarn("%s %s: LENGTH %lld NOT MULTIPLE OF %d",
    179 					"DIRECTORY", pathbuf,
    180 					(long long)inp->i_isize, dirblksiz);
    181 			if (preen)
    182 				printf(" (ADJUSTED)\n");
    183 			inp->i_isize = roundup(inp->i_isize, dirblksiz);
    184 			if (preen || reply("ADJUST") == 1) {
    185 				dp = ginode(inp->i_number);
    186 				DIP_SET(dp, size, iswap64(inp->i_isize));
    187 				inodirty();
    188 			} else
    189 				markclean = 0;
    190 		}
    191 		memset(&dino, 0, sizeof dino);
    192 		dp = &dino;
    193 		if (!is_ufs2) {
    194 			dp->dp1.di_mode = iswap16(IFDIR);
    195 			dp->dp1.di_size = iswap64(inp->i_isize);
    196 			maxblk = inp->i_numblks < NDADDR ? inp->i_numblks :
    197 			    NDADDR;
    198 			for (i = 0; i < maxblk; i++)
    199 				dp->dp1.di_db[i] = inp->i_blks[i];
    200 			if (inp->i_numblks > NDADDR) {
    201 				for (i = 0; i < NIADDR; i++)
    202 					dp->dp1.di_ib[i] =
    203 					    inp->i_blks[NDADDR + i];
    204 			}
    205 		} else {
    206 			dp->dp2.di_mode = iswap16(IFDIR);
    207 			dp->dp2.di_size = iswap64(inp->i_isize);
    208 			maxblk = inp->i_numblks < NDADDR ? inp->i_numblks :
    209 			    NDADDR;
    210 			for (i = 0; i < maxblk; i++)
    211 				dp->dp2.di_db[i] = inp->i_blks[i];
    212 			if (inp->i_numblks > NDADDR) {
    213 				for (i = 0; i < NIADDR; i++)
    214 					dp->dp2.di_ib[i] =
    215 					    inp->i_blks[NDADDR + i];
    216 			}
    217 		}
    218 		curino.id_number = inp->i_number;
    219 		curino.id_parent = inp->i_parent;
    220 		curino.id_uid = iswap32(DIP(dp, uid));
    221 		curino.id_gid = iswap32(DIP(dp, gid));
    222 		(void)ckinode(&dino, &curino);
    223 	}
    224 
    225 	/*
    226 	 * Byte swapping in directory entries, if needed, has been done.
    227 	 * Now rescan dirs for pass2check()
    228 	 */
    229 	if (do_dirswap) {
    230 		do_dirswap = 0;
    231 		for (inpp = inpsort; inpp < inpend; inpp++) {
    232 			inp = *inpp;
    233 			if (inp->i_isize == 0)
    234 				continue;
    235 			memset(&dino, 0, sizeof dino);
    236 			if (!is_ufs2) {
    237 				dino.dp1.di_mode = iswap16(IFDIR);
    238 				dino.dp1.di_size = iswap64(inp->i_isize);
    239 				for (i = 0; i < inp->i_numblks; i++)
    240 					dino.dp1.di_db[i] = inp->i_blks[i];
    241 			} else {
    242 				dino.dp2.di_mode = iswap16(IFDIR);
    243 				dino.dp2.di_size = iswap64(inp->i_isize);
    244 				for (i = 0; i < inp->i_numblks; i++)
    245 					dino.dp2.di_db[i] = inp->i_blks[i];
    246 			}
    247 			curino.id_number = inp->i_number;
    248 			curino.id_parent = inp->i_parent;
    249 			curino.id_uid = iswap32(DIP(&dino, uid));
    250 			curino.id_gid = iswap32(DIP(&dino, gid));
    251 			(void)ckinode(&dino, &curino);
    252 		}
    253 	}
    254 
    255 	/*
    256 	 * Now that the parents of all directories have been found,
    257 	 * make another pass to verify the value of `..'
    258 	 */
    259 	for (inpp = inpsort; inpp < inpend; inpp++) {
    260 		inp = *inpp;
    261 		if (inp->i_parent == 0 || inp->i_isize == 0)
    262 			continue;
    263 		if (inp->i_dotdot == inp->i_parent ||
    264 		    inp->i_dotdot == (ino_t)-1)
    265 			continue;
    266 		info = inoinfo(inp->i_parent);
    267 		if (inp->i_dotdot == 0) {
    268 			inp->i_dotdot = inp->i_parent;
    269 			fileerror(inp->i_parent, inp->i_number, "MISSING '..'");
    270 			if (reply("FIX") == 0) {
    271 				markclean = 0;
    272 				continue;
    273 			}
    274 			(void)makeentry(inp->i_number, inp->i_parent, "..");
    275 			info->ino_linkcnt--;
    276 			continue;
    277 		}
    278 		fileerror(inp->i_parent, inp->i_number,
    279 		    "BAD INODE NUMBER FOR '..'");
    280 		if (reply("FIX") == 0) {
    281 			markclean = 0;
    282 			continue;
    283 		}
    284 		inoinfo(inp->i_dotdot)->ino_linkcnt++;
    285 		info->ino_linkcnt--;
    286 		inp->i_dotdot = inp->i_parent;
    287 		(void)changeino(inp->i_number, "..", inp->i_parent);
    288 	}
    289 	/*
    290 	 * Create a list of children for each directory.
    291 	 */
    292 	inpend = &inpsort[inplast];
    293 	for (inpp = inpsort; inpp < inpend; inpp++) {
    294 		inp = *inpp;
    295 		info = inoinfo(inp->i_number);
    296 		inp->i_child = inp->i_sibling = 0;
    297 		if (info->ino_state == DFOUND)
    298 			info->ino_state = DSTATE;
    299 	}
    300 	for (inpp = inpsort; inpp < inpend; inpp++) {
    301 		inp = *inpp;
    302 		if (inp->i_parent == 0 ||
    303 		    inp->i_number == ROOTINO)
    304 			continue;
    305 		pinp = getinoinfo(inp->i_parent);
    306 		inp->i_sibling = pinp->i_child;
    307 		pinp->i_child = inp;
    308 	}
    309 	/*
    310 	 * Mark all the directories that can be found from the root.
    311 	 */
    312 	propagate(ROOTINO);
    313 
    314 #ifdef PROGRESS
    315 	if (!preen)
    316 		progress_done();
    317 #endif /* PROGRESS */
    318 }
    319 
    320 static int
    321 pass2check(struct inodesc *idesc)
    322 {
    323 	struct direct *dirp = idesc->id_dirp;
    324 	struct inoinfo *inp;
    325 	struct inostat *info;
    326 	int n, entrysize, ret = 0;
    327 	union dinode *dp;
    328 	const char *errmsg;
    329 	struct direct proto;
    330 	char namebuf[MAXPATHLEN + 1];
    331 	char pathbuf[MAXPATHLEN + 1];
    332 
    333 	/*
    334 	 * If converting, set directory entry type.
    335 	 */
    336 	if (!is_ufs2 && doinglevel2 && iswap32(dirp->d_ino) > 0 &&
    337 	    iswap32(dirp->d_ino) < maxino) {
    338 		dirp->d_type = inoinfo(iswap32(dirp->d_ino))->ino_type;
    339 		ret |= ALTERED;
    340 	}
    341 	/*
    342 	 * check for "."
    343 	 */
    344 	if (idesc->id_entryno != 0)
    345 		goto chk1;
    346 	if (dirp->d_ino != 0 && strcmp(dirp->d_name, ".") == 0) {
    347 		if (iswap32(dirp->d_ino) != idesc->id_number) {
    348 			direrror(idesc->id_number, "BAD INODE NUMBER FOR '.'");
    349 			dirp->d_ino = iswap32(idesc->id_number);
    350 			if (reply("FIX") == 1)
    351 				ret |= ALTERED;
    352 			else
    353 				markclean = 0;
    354 		}
    355 		if (newinofmt && dirp->d_type != DT_DIR) {
    356 			direrror(idesc->id_number, "BAD TYPE VALUE FOR '.'");
    357 			dirp->d_type = DT_DIR;
    358 			if (reply("FIX") == 1)
    359 				ret |= ALTERED;
    360 			else
    361 				markclean = 0;
    362 		}
    363 		goto chk1;
    364 	}
    365 	direrror(idesc->id_number, "MISSING '.'");
    366 	proto.d_ino = iswap32(idesc->id_number);
    367 	if (newinofmt)
    368 		proto.d_type = DT_DIR;
    369 	else
    370 		proto.d_type = 0;
    371 	proto.d_namlen = 1;
    372 	(void)strlcpy(proto.d_name, ".", sizeof(proto.d_name));
    373 #	if BYTE_ORDER == LITTLE_ENDIAN
    374 		if (!newinofmt && !needswap) {
    375 #	else
    376 		if (!newinofmt && needswap) {
    377 #	endif
    378 			u_char tmp;
    379 
    380 			tmp = proto.d_type;
    381 			proto.d_type = proto.d_namlen;
    382 			proto.d_namlen = tmp;
    383 		}
    384 	entrysize = DIRSIZ(0, &proto, 0);
    385 	if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") != 0) {
    386 		pfatal("CANNOT FIX, FIRST ENTRY IN DIRECTORY CONTAINS %s\n",
    387 			dirp->d_name);
    388 		markclean = 0;
    389 	} else if (iswap16(dirp->d_reclen) < entrysize) {
    390 		pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '.'\n");
    391 		markclean = 0;
    392 	} else if (iswap16(dirp->d_reclen) < 2 * entrysize) {
    393 		proto.d_reclen = dirp->d_reclen;
    394 		memmove(dirp, &proto, (size_t)entrysize);
    395 		if (reply("FIX") == 1)
    396 			ret |= ALTERED;
    397 		else
    398 			markclean = 0;
    399 	} else {
    400 		n = iswap16(dirp->d_reclen) - entrysize;
    401 		proto.d_reclen = iswap16(entrysize);
    402 		memmove(dirp, &proto, (size_t)entrysize);
    403 		idesc->id_entryno++;
    404 		inoinfo(iswap32(dirp->d_ino))->ino_linkcnt--;
    405 		dirp = (struct direct *)((char *)(dirp) + entrysize);
    406 		memset(dirp, 0, (size_t)n);
    407 		dirp->d_reclen = iswap16(n);
    408 		if (reply("FIX") == 1)
    409 			ret |= ALTERED;
    410 		else
    411 			markclean = 0;
    412 	}
    413 chk1:
    414 	if (idesc->id_entryno > 1)
    415 		goto chk2;
    416 	inp = getinoinfo(idesc->id_number);
    417 	proto.d_ino = iswap32(inp->i_parent);
    418 	if (newinofmt)
    419 		proto.d_type = DT_DIR;
    420 	else
    421 		proto.d_type = 0;
    422 	proto.d_namlen = 2;
    423 	(void)strlcpy(proto.d_name, "..", sizeof(proto.d_name));
    424 #if BYTE_ORDER == LITTLE_ENDIAN
    425 	if (!newinofmt && !needswap) {
    426 #else
    427 	if (!newinofmt && needswap) {
    428 #endif
    429 		u_char tmp;
    430 
    431 		tmp = proto.d_type;
    432 		proto.d_type = proto.d_namlen;
    433 		proto.d_namlen = tmp;
    434 	}
    435 	entrysize = DIRSIZ(0, &proto, 0);
    436 	if (idesc->id_entryno == 0) {
    437 		n = DIRSIZ(0, dirp, 0);
    438 		if (iswap16(dirp->d_reclen) < n + entrysize)
    439 			goto chk2;
    440 		proto.d_reclen = iswap16(iswap16(dirp->d_reclen) - n);
    441 		dirp->d_reclen = iswap16(n);
    442 		idesc->id_entryno++;
    443 		inoinfo(iswap32(dirp->d_ino))->ino_linkcnt--;
    444 		dirp = (struct direct *)((char *)(dirp) + n);
    445 		memset(dirp, 0, (size_t)iswap16(proto.d_reclen));
    446 		dirp->d_reclen = proto.d_reclen;
    447 	}
    448 	if (dirp->d_ino != 0 && strcmp(dirp->d_name, "..") == 0) {
    449 		inp->i_dotdot = iswap32(dirp->d_ino);
    450 		if (newinofmt && dirp->d_type != DT_DIR) {
    451 			direrror(idesc->id_number, "BAD TYPE VALUE FOR '..'");
    452 			dirp->d_type = DT_DIR;
    453 			if (reply("FIX") == 1)
    454 				ret |= ALTERED;
    455 			else
    456 				markclean = 0;
    457 		}
    458 		goto chk2;
    459 	}
    460 	if (iswap32(dirp->d_ino) != 0 && strcmp(dirp->d_name, ".") != 0) {
    461 		fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
    462 		pfatal("CANNOT FIX, SECOND ENTRY IN DIRECTORY CONTAINS %s\n",
    463 			dirp->d_name);
    464 		inp->i_dotdot = (ino_t)-1;
    465 		markclean = 0;
    466 	} else if (iswap16(dirp->d_reclen) < entrysize) {
    467 		fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
    468 		pfatal("CANNOT FIX, INSUFFICIENT SPACE TO ADD '..'\n");
    469 		inp->i_dotdot = (ino_t)-1;
    470 		markclean = 0;
    471 	} else if (inp->i_parent != 0) {
    472 		/*
    473 		 * We know the parent, so fix now.
    474 		 */
    475 		inp->i_dotdot = inp->i_parent;
    476 		fileerror(inp->i_parent, idesc->id_number, "MISSING '..'");
    477 		proto.d_reclen = dirp->d_reclen;
    478 		memmove(dirp, &proto, (size_t)entrysize);
    479 		if (reply("FIX") == 1)
    480 			ret |= ALTERED;
    481 		else
    482 			markclean = 0;
    483 	}
    484 	idesc->id_entryno++;
    485 	if (dirp->d_ino != 0)
    486 		inoinfo(iswap32(dirp->d_ino))->ino_linkcnt--;
    487 	return (ret|KEEPON);
    488 chk2:
    489 	if (dirp->d_ino == 0)
    490 		return (ret|KEEPON);
    491 	if (dirp->d_namlen <= 2 &&
    492 	    dirp->d_name[0] == '.' &&
    493 	    idesc->id_entryno >= 2) {
    494 		if (dirp->d_namlen == 1) {
    495 			direrror(idesc->id_number, "EXTRA '.' ENTRY");
    496 			dirp->d_ino = 0;
    497 			if (reply("FIX") == 1)
    498 				ret |= ALTERED;
    499 			else
    500 				markclean = 0;
    501 			return (KEEPON | ret);
    502 		}
    503 		if (dirp->d_name[1] == '.') {
    504 			direrror(idesc->id_number, "EXTRA '..' ENTRY");
    505 			dirp->d_ino = 0;
    506 			if (reply("FIX") == 1)
    507 				ret |= ALTERED;
    508 			else
    509 				markclean = 0;
    510 			return (KEEPON | ret);
    511 		}
    512 	}
    513 	idesc->id_entryno++;
    514 	n = 0;
    515 	if (iswap32(dirp->d_ino) > maxino) {
    516 		fileerror(idesc->id_number, dirp->d_ino, "I OUT OF RANGE");
    517 		n = reply("REMOVE");
    518 		if (n == 0)
    519 			markclean = 0;
    520 	} else if (newinofmt &&
    521 		   ((iswap32(dirp->d_ino) == WINO && dirp->d_type != DT_WHT) ||
    522 		    (iswap32(dirp->d_ino) != WINO && dirp->d_type == DT_WHT))) {
    523 		fileerror(idesc->id_number, iswap32(dirp->d_ino), "BAD WHITEOUT ENTRY");
    524 		dirp->d_ino = iswap32(WINO);
    525 		dirp->d_type = DT_WHT;
    526 		if (reply("FIX") == 1)
    527 			ret |= ALTERED;
    528 		else
    529 			markclean = 0;
    530 	} else {
    531 again:
    532 		info = inoinfo(iswap32(dirp->d_ino));
    533 		switch (info->ino_state) {
    534 		case USTATE:
    535 			if (idesc->id_entryno <= 2)
    536 				break;
    537 			fileerror(idesc->id_number, iswap32(dirp->d_ino), "UNALLOCATED");
    538 			n = reply("REMOVE");
    539 			if (n == 0)
    540 				markclean = 0;
    541 			break;
    542 
    543 		case DCLEAR:
    544 		case FCLEAR:
    545 			if (idesc->id_entryno <= 2)
    546 				break;
    547 			if (info->ino_state == FCLEAR)
    548 				errmsg = "DUP/BAD";
    549 			else if (!preen && !usedsoftdep)
    550 				errmsg = "ZERO LENGTH DIRECTORY";
    551 			else {
    552 				n = 1;
    553 				break;
    554 			}
    555 			fileerror(idesc->id_number, iswap32(dirp->d_ino), errmsg);
    556 			if ((n = reply("REMOVE")) == 1)
    557 				break;
    558 			dp = ginode(iswap32(dirp->d_ino));
    559 			info->ino_state =
    560 			    (iswap16(DIP(dp, mode)) & IFMT) == IFDIR ? DSTATE : FSTATE;
    561 			info->ino_linkcnt = iswap16(DIP(dp, nlink));
    562 			goto again;
    563 
    564 		case DSTATE:
    565 		case DFOUND:
    566 			inp = getinoinfo(iswap32(dirp->d_ino));
    567 			if (inp->i_parent != 0 && idesc->id_entryno > 2) {
    568 				getpathname(pathbuf, sizeof(pathbuf),
    569 				    idesc->id_number, idesc->id_number);
    570 				getpathname(namebuf, sizeof(namebuf),
    571 				    iswap32(dirp->d_ino), iswap32(dirp->d_ino));
    572 				pwarn("%s %s %s\n", pathbuf,
    573 				    "IS AN EXTRANEOUS HARD LINK TO DIRECTORY",
    574 				    namebuf);
    575 				if (preen)
    576 					printf(" (IGNORED)\n");
    577 				else if ((n = reply("REMOVE")) == 1)
    578 					break;
    579 			}
    580 			if (idesc->id_entryno > 2)
    581 				inp->i_parent = idesc->id_number;
    582 			/* fall through */
    583 
    584 		case FSTATE:
    585 			if (newinofmt && dirp->d_type != info->ino_type) {
    586 				fileerror(idesc->id_number, iswap32(dirp->d_ino),
    587 				    "BAD TYPE VALUE");
    588 				dirp->d_type = info->ino_type;
    589 				if (reply("FIX") == 1)
    590 					ret |= ALTERED;
    591 				else
    592 					markclean = 0;
    593 			}
    594 			info->ino_linkcnt--;
    595 			break;
    596 
    597 		default:
    598 			errexit("BAD STATE %d FOR INODE I=%d",
    599 			    info->ino_state, iswap32(dirp->d_ino));
    600 		}
    601 	}
    602 	if (n == 0)
    603 		return (ret|KEEPON);
    604 	dirp->d_ino = 0;
    605 	return (ret|KEEPON|ALTERED);
    606 }
    607 
    608 /*
    609  * Routine to sort disk blocks.
    610  */
    611 static int
    612 blksort(const void *arg1, const void *arg2)
    613 {
    614 
    615 	return ((*(const struct inoinfo *const *)arg1)->i_blks[0] -
    616 		(*(const struct inoinfo *const *)arg2)->i_blks[0]);
    617 }
    618