GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: sbin/fsck_ext2fs/dir.c Lines: 0 380 0.0 %
Date: 2017-11-07 Branches: 0 224 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: dir.c,v 1.20 2015/01/16 06:39:57 deraadt 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>	/* DEV_BSIZE roundup */
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
#include <limits.h>
47
48
#include "fsck.h"
49
#include "fsutil.h"
50
#include "extern.h"
51
52
char	*lfname = "lost+found";
53
int	lfmode = 01777;
54
struct	ext2fs_dirtemplate emptydir = { 0, DIRBLKSIZ };
55
struct	ext2fs_dirtemplate dirhead = {
56
	0, 12, 1, EXT2_FT_DIR, ".",
57
	0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".."
58
};
59
#undef DIRBLKSIZ
60
61
static int expanddir(struct ext2fs_dinode *, char *);
62
static void freedir(ino_t, ino_t);
63
static struct ext2fs_direct *fsck_readdir(struct inodesc *);
64
static struct bufarea *getdirblk(daddr32_t, long);
65
static int lftempname(char *, ino_t);
66
static int mkentry(struct inodesc *);
67
static int chgino(struct  inodesc *);
68
69
/*
70
 * Propagate connected state through the tree.
71
 */
72
void
73
propagate(void)
74
{
75
	struct inoinfo **inpp, *inp, *pinp;
76
	struct inoinfo **inpend;
77
78
	/*
79
	 * Create a list of children for each directory.
80
	 */
81
	inpend = &inpsort[inplast];
82
	for (inpp = inpsort; inpp < inpend; inpp++) {
83
		inp = *inpp;
84
		if (inp->i_parent == 0 ||
85
		    inp->i_number == EXT2_ROOTINO)
86
			continue;
87
		pinp = getinoinfo(inp->i_parent);
88
		inp->i_parentp = pinp;
89
		inp->i_sibling = pinp->i_child;
90
		pinp->i_child = inp;
91
	}
92
	inp = getinoinfo(EXT2_ROOTINO);
93
	while (inp) {
94
		statemap[inp->i_number] = DFOUND;
95
		if (inp->i_child &&
96
		    statemap[inp->i_child->i_number] == DSTATE)
97
			inp = inp->i_child;
98
		else if (inp->i_sibling)
99
			inp = inp->i_sibling;
100
		else
101
			inp = inp->i_parentp;
102
	}
103
}
104
105
/*
106
 * Scan each entry in a directory block.
107
 */
108
int
109
dirscan(struct inodesc *idesc)
110
{
111
	struct ext2fs_direct *dp;
112
	struct bufarea *bp;
113
	int dsize, n;
114
	long blksiz;
115
	char *dbuf = NULL;
116
117
	if ((dbuf = malloc(sblock.e2fs_bsize)) == NULL) {
118
		fprintf(stderr, "out of memory");
119
		exit(8);
120
	}
121
122
	if (idesc->id_type != DATA)
123
		errexit("wrong type to dirscan %d\n", idesc->id_type);
124
	if (idesc->id_entryno == 0 &&
125
	    (idesc->id_filesize & (sblock.e2fs_bsize - 1)) != 0)
126
		idesc->id_filesize = roundup(idesc->id_filesize, sblock.e2fs_bsize);
127
	blksiz = idesc->id_numfrags * sblock.e2fs_bsize;
128
	if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
129
		idesc->id_filesize -= blksiz;
130
		free(dbuf);
131
		return (SKIP);
132
	}
133
	idesc->id_loc = 0;
134
	for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
135
		dsize = letoh16(dp->e2d_reclen);
136
		memcpy(dbuf, dp, (size_t)dsize);
137
		idesc->id_dirp = (struct ext2fs_direct *)dbuf;
138
		if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
139
			bp = getdirblk(idesc->id_blkno, blksiz);
140
			memcpy(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf,
141
			    (size_t)dsize);
142
			dirty(bp);
143
			sbdirty();
144
		}
145
		if (n & STOP) {
146
			free(dbuf);
147
			return (n);
148
		}
149
	}
150
	free(dbuf);
151
	return (idesc->id_filesize > 0 ? KEEPON : STOP);
152
}
153
154
/*
155
 * get next entry in a directory.
156
 */
157
static struct ext2fs_direct *
158
fsck_readdir(struct inodesc *idesc)
159
{
160
	struct ext2fs_direct *dp, *ndp;
161
	struct bufarea *bp;
162
	long size, blksiz, fix, dploc;
163
164
	blksiz = idesc->id_numfrags * sblock.e2fs_bsize;
165
	bp = getdirblk(idesc->id_blkno, blksiz);
166
	if (idesc->id_loc % sblock.e2fs_bsize == 0 && idesc->id_filesize > 0 &&
167
	    idesc->id_loc < blksiz) {
168
		dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
169
		if (dircheck(idesc, dp))
170
			goto dpok;
171
		if (idesc->id_fix == IGNORE)
172
			return (0);
173
		fix = dofix(idesc, "DIRECTORY CORRUPTED");
174
		bp = getdirblk(idesc->id_blkno, blksiz);
175
		dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
176
		dp->e2d_reclen = htole16(sblock.e2fs_bsize);
177
		dp->e2d_ino = 0;
178
		dp->e2d_namlen = 0;
179
		dp->e2d_type = 0;
180
		dp->e2d_name[0] = '\0';
181
		if (fix)
182
			dirty(bp);
183
		idesc->id_loc += sblock.e2fs_bsize;
184
		idesc->id_filesize -= sblock.e2fs_bsize;
185
		return (dp);
186
	}
187
dpok:
188
	if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
189
		return NULL;
190
	dploc = idesc->id_loc;
191
	dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc);
192
	idesc->id_loc += letoh16(dp->e2d_reclen);
193
	idesc->id_filesize -= letoh16(dp->e2d_reclen);
194
	if ((idesc->id_loc % sblock.e2fs_bsize) == 0)
195
		return (dp);
196
	ndp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
197
	if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
198
	    dircheck(idesc, ndp) == 0) {
199
		size = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize);
200
		idesc->id_loc += size;
201
		idesc->id_filesize -= size;
202
		if (idesc->id_fix == IGNORE)
203
			return (0);
204
		fix = dofix(idesc, "DIRECTORY CORRUPTED");
205
		bp = getdirblk(idesc->id_blkno, blksiz);
206
		dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc);
207
		dp->e2d_reclen = htole16(letoh16(dp->e2d_reclen) + size);
208
		if (fix)
209
			dirty(bp);
210
	}
211
	return (dp);
212
}
213
214
/*
215
 * Verify that a directory entry is valid.
216
 * This is a superset of the checks made in the kernel.
217
 */
218
int
219
dircheck(struct inodesc *idesc, struct ext2fs_direct *dp)
220
{
221
	int size;
222
	char *cp;
223
	int spaceleft;
224
	u_int16_t reclen = letoh16(dp->e2d_reclen);
225
226
	spaceleft = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize);
227
	if (letoh32(dp->e2d_ino) > maxino ||
228
	    reclen == 0 ||
229
	    reclen > spaceleft ||
230
	    (reclen & 0x3) != 0)
231
		return (0);
232
	if (dp->e2d_ino == 0)
233
		return (1);
234
	if (sblock.e2fs.e2fs_rev < E2FS_REV1 ||
235
	    (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE) == 0)
236
		if (dp->e2d_type != 0)
237
			return (1);
238
	size = EXT2FS_DIRSIZ(dp->e2d_namlen);
239
	if (reclen < size ||
240
	    idesc->id_filesize < size ||
241
	    dp->e2d_namlen > EXT2FS_MAXNAMLEN)
242
		return (0);
243
	for (cp = dp->e2d_name, size = 0; size < dp->e2d_namlen; size++)
244
		if (*cp == '\0' || (*cp++ == '/'))
245
			return (0);
246
	return (1);
247
}
248
249
void
250
direrror(ino_t ino, char *errmesg)
251
{
252
253
	fileerror(ino, ino, errmesg);
254
}
255
256
void
257
fileerror(ino_t cwd, ino_t ino, char *errmesg)
258
{
259
	struct ext2fs_dinode *dp;
260
	char pathbuf[PATH_MAX + 1];
261
262
	pwarn("%s ", errmesg);
263
	pinode(ino);
264
	printf("\n");
265
	getpathname(pathbuf, sizeof pathbuf, cwd, ino);
266
	if ((ino < EXT2_FIRSTINO && ino != EXT2_ROOTINO) || ino > maxino) {
267
		pfatal("NAME=%s\n", pathbuf);
268
		return;
269
	}
270
	dp = ginode(ino);
271
	if (ftypeok(dp))
272
		pfatal("%s=%s\n",
273
		    (letoh16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf);
274
	else
275
		pfatal("NAME=%s\n", pathbuf);
276
}
277
278
void
279
adjust(struct inodesc *idesc, short lcnt)
280
{
281
	struct ext2fs_dinode *dp;
282
283
	dp = ginode(idesc->id_number);
284
	if (letoh16(dp->e2di_nlink) == lcnt) {
285
		if (linkup(idesc->id_number, (ino_t)0) == 0)
286
			clri(idesc, "UNREF", 0);
287
	} else {
288
		pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
289
			((letoh16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE"));
290
		pinode(idesc->id_number);
291
		printf(" COUNT %d SHOULD BE %d",
292
			letoh16(dp->e2di_nlink), letoh16(dp->e2di_nlink) - lcnt);
293
		if (preen) {
294
			if (lcnt < 0) {
295
				printf("\n");
296
				pfatal("LINK COUNT INCREASING");
297
			}
298
			printf(" (ADJUSTED)\n");
299
		}
300
		if (preen || reply("ADJUST") == 1) {
301
			dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) - lcnt);
302
			inodirty();
303
		}
304
	}
305
}
306
307
static int
308
mkentry(struct inodesc *idesc)
309
{
310
	struct ext2fs_direct *dirp = idesc->id_dirp;
311
	struct ext2fs_direct newent;
312
	int newlen, oldlen;
313
314
	newent.e2d_type = EXT2_FT_UNKNOWN;
315
	newent.e2d_namlen = strlen(idesc->id_name);
316
	if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
317
	    (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
318
		newent.e2d_type = inot2ext2dt(typemap[idesc->id_parent]);
319
	newlen = EXT2FS_DIRSIZ(newent.e2d_namlen);
320
	if (dirp->e2d_ino != 0)
321
		oldlen = EXT2FS_DIRSIZ(dirp->e2d_namlen);
322
	else
323
		oldlen = 0;
324
	if (letoh16(dirp->e2d_reclen) - oldlen < newlen)
325
		return (KEEPON);
326
	newent.e2d_reclen = htole16(letoh16(dirp->e2d_reclen) - oldlen);
327
	dirp->e2d_reclen = htole16(oldlen);
328
	dirp = (struct ext2fs_direct *)(((char *)dirp) + oldlen);
329
	dirp->e2d_ino = htole32(idesc->id_parent); /* ino to be entered is in id_parent */
330
	dirp->e2d_reclen = newent.e2d_reclen;
331
	dirp->e2d_namlen = newent.e2d_namlen;
332
	dirp->e2d_type = newent.e2d_type;
333
	memcpy(dirp->e2d_name, idesc->id_name, (size_t)(dirp->e2d_namlen));
334
	return (ALTERED|STOP);
335
}
336
337
static int
338
chgino(struct inodesc *idesc)
339
{
340
	struct ext2fs_direct *dirp = idesc->id_dirp;
341
	u_int16_t namlen = dirp->e2d_namlen;
342
343
	if (strlen(idesc->id_name) != namlen ||
344
		strncmp(dirp->e2d_name, idesc->id_name, (int)namlen))
345
		return (KEEPON);
346
	dirp->e2d_ino = htole32(idesc->id_parent);
347
	if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
348
	    (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
349
		dirp->e2d_type = inot2ext2dt(typemap[idesc->id_parent]);
350
	else
351
		dirp->e2d_type = 0;
352
	return (ALTERED|STOP);
353
}
354
355
int
356
linkup(ino_t orphan, ino_t parentdir)
357
{
358
	struct ext2fs_dinode *dp;
359
	int lostdir;
360
	ino_t oldlfdir;
361
	struct inodesc idesc;
362
	char tempname[BUFSIZ];
363
364
	memset(&idesc, 0, sizeof(struct inodesc));
365
	dp = ginode(orphan);
366
	lostdir = (letoh16(dp->e2di_mode) & IFMT) == IFDIR;
367
	pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
368
	pinode(orphan);
369
	if (preen && inosize(dp) == 0)
370
		return (0);
371
	if (preen)
372
		printf(" (RECONNECTED)\n");
373
	else
374
		if (reply("RECONNECT") == 0)
375
			return (0);
376
	if (lfdir == 0) {
377
		dp = ginode(EXT2_ROOTINO);
378
		idesc.id_name = lfname;
379
		idesc.id_type = DATA;
380
		idesc.id_func = findino;
381
		idesc.id_number = EXT2_ROOTINO;
382
		if ((ckinode(dp, &idesc) & FOUND) != 0) {
383
			lfdir = idesc.id_parent;
384
		} else {
385
			pwarn("NO lost+found DIRECTORY");
386
			if (preen || reply("CREATE")) {
387
				lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode);
388
				if (lfdir != 0) {
389
					if (makeentry(EXT2_ROOTINO, lfdir, lfname) != 0) {
390
						if (preen)
391
							printf(" (CREATED)\n");
392
					} else {
393
						freedir(lfdir, EXT2_ROOTINO);
394
						lfdir = 0;
395
						if (preen)
396
							printf("\n");
397
					}
398
				}
399
			}
400
		}
401
		if (lfdir == 0) {
402
			pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY");
403
			printf("\n\n");
404
			return (0);
405
		}
406
	}
407
	dp = ginode(lfdir);
408
	if ((letoh16(dp->e2di_mode) & IFMT) != IFDIR) {
409
		pfatal("lost+found IS NOT A DIRECTORY");
410
		if (reply("REALLOCATE") == 0)
411
			return (0);
412
		oldlfdir = lfdir;
413
		if ((lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode)) == 0) {
414
			pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
415
			return (0);
416
		}
417
		if ((changeino(EXT2_ROOTINO, lfname, lfdir) & ALTERED) == 0) {
418
			pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
419
			return (0);
420
		}
421
		inodirty();
422
		idesc.id_type = ADDR;
423
		idesc.id_func = pass4check;
424
		idesc.id_number = oldlfdir;
425
		adjust(&idesc, lncntp[oldlfdir] + 1);
426
		lncntp[oldlfdir] = 0;
427
		dp = ginode(lfdir);
428
	}
429
	if (statemap[lfdir] != DFOUND) {
430
		pfatal("SORRY. NO lost+found DIRECTORY\n\n");
431
		return (0);
432
	}
433
	(void)lftempname(tempname, orphan);
434
	if (makeentry(lfdir, orphan, tempname) == 0) {
435
		pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
436
		printf("\n\n");
437
		return (0);
438
	}
439
	lncntp[orphan]--;
440
	if (lostdir) {
441
		if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 &&
442
		    parentdir != (ino_t)-1)
443
			(void)makeentry(orphan, lfdir, "..");
444
		dp = ginode(lfdir);
445
		dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) +1);
446
		inodirty();
447
		lncntp[lfdir]++;
448
		pwarn("DIR I=%llu CONNECTED. ", (unsigned long long)orphan);
449
		if (parentdir != (ino_t)-1)
450
			printf("PARENT WAS I=%llu\n",
451
			    (unsigned long long)parentdir);
452
		if (preen == 0)
453
			printf("\n");
454
	}
455
	return (1);
456
}
457
458
/*
459
 * fix an entry in a directory.
460
 */
461
int
462
changeino(ino_t dir, char *name, ino_t newnum)
463
{
464
	struct inodesc idesc;
465
466
	memset(&idesc, 0, sizeof(struct inodesc));
467
	idesc.id_type = DATA;
468
	idesc.id_func = chgino;
469
	idesc.id_number = dir;
470
	idesc.id_fix = DONTKNOW;
471
	idesc.id_name = name;
472
	idesc.id_parent = newnum;	/* new value for name */
473
	return (ckinode(ginode(dir), &idesc));
474
}
475
476
/*
477
 * make an entry in a directory
478
 */
479
int
480
makeentry(ino_t parent, ino_t ino, char *name)
481
{
482
	struct ext2fs_dinode *dp;
483
	struct inodesc idesc;
484
	char pathbuf[PATH_MAX + 1];
485
486
	if ((parent < EXT2_FIRSTINO && parent != EXT2_ROOTINO)
487
		|| parent >= maxino ||
488
	    (ino < EXT2_FIRSTINO && ino < EXT2_ROOTINO) || ino >= maxino)
489
		return (0);
490
	memset(&idesc, 0, sizeof(struct inodesc));
491
	idesc.id_type = DATA;
492
	idesc.id_func = mkentry;
493
	idesc.id_number = parent;
494
	idesc.id_parent = ino;	/* this is the inode to enter */
495
	idesc.id_fix = DONTKNOW;
496
	idesc.id_name = name;
497
	dp = ginode(parent);
498
	if (inosize(dp) % sblock.e2fs_bsize) {
499
		inossize(dp, roundup(inosize(dp), sblock.e2fs_bsize));
500
		inodirty();
501
	}
502
	if ((ckinode(dp, &idesc) & ALTERED) != 0)
503
		return (1);
504
	getpathname(pathbuf, sizeof pathbuf, parent, parent);
505
	dp = ginode(parent);
506
	if (expanddir(dp, pathbuf) == 0)
507
		return (0);
508
	return (ckinode(dp, &idesc) & ALTERED);
509
}
510
511
/*
512
 * Attempt to expand the size of a directory
513
 */
514
static int
515
expanddir(struct ext2fs_dinode *dp, char *name)
516
{
517
	daddr32_t lastbn, newblk;
518
	struct bufarea *bp;
519
	char *firstblk;
520
521
	lastbn = lblkno(&sblock, inosize(dp));
522
	if (lastbn >= NDADDR - 1 || letoh32(dp->e2di_blocks[lastbn]) == 0 ||
523
		inosize(dp) == 0)
524
		return (0);
525
	if ((newblk = allocblk()) == 0)
526
		return (0);
527
	dp->e2di_blocks[lastbn + 1] = dp->e2di_blocks[lastbn];
528
	dp->e2di_blocks[lastbn] = htole32(newblk);
529
	inossize(dp, inosize(dp) + sblock.e2fs_bsize);
530
	dp->e2di_nblock = htole32(letoh32(dp->e2di_nblock) + 1);
531
	bp = getdirblk(letoh32(dp->e2di_blocks[lastbn + 1]),
532
		sblock.e2fs_bsize);
533
	if (bp->b_errs)
534
		goto bad;
535
	if ((firstblk = malloc(sblock.e2fs_bsize)) == NULL) {
536
		fprintf(stderr, "out of memory\n");
537
		exit(8);
538
	}
539
	memcpy(firstblk, bp->b_un.b_buf, sblock.e2fs_bsize);
540
	bp = getdirblk(newblk, sblock.e2fs_bsize);
541
	if (bp->b_errs) {
542
		free(firstblk);
543
		goto bad;
544
	}
545
	memcpy(bp->b_un.b_buf, firstblk, sblock.e2fs_bsize);
546
	free(firstblk);
547
	dirty(bp);
548
	bp = getdirblk(letoh32(dp->e2di_blocks[lastbn + 1]),
549
		sblock.e2fs_bsize);
550
	if (bp->b_errs)
551
		goto bad;
552
	emptydir.dot_reclen = htole16(sblock.e2fs_bsize);
553
	memcpy(bp->b_un.b_buf, &emptydir, sizeof emptydir);
554
	pwarn("NO SPACE LEFT IN %s", name);
555
	if (preen)
556
		printf(" (EXPANDED)\n");
557
	else if (reply("EXPAND") == 0)
558
		goto bad;
559
	dirty(bp);
560
	inodirty();
561
	return (1);
562
bad:
563
	dp->e2di_blocks[lastbn] = dp->e2di_blocks[lastbn + 1];
564
	dp->e2di_blocks[lastbn + 1] = 0;
565
	dp->e2di_size = htole32(letoh32(dp->e2di_size) - sblock.e2fs_bsize);
566
	inossize(dp, inosize(dp) - sblock.e2fs_bsize);
567
	dp->e2di_nblock = htole32(letoh32(dp->e2di_nblock) - 1);
568
	freeblk(newblk);
569
	return (0);
570
}
571
572
/*
573
 * allocate a new directory
574
 */
575
int
576
allocdir(ino_t parent, ino_t request, int mode)
577
{
578
	ino_t ino;
579
	struct ext2fs_dinode *dp;
580
	struct bufarea *bp;
581
	struct ext2fs_dirtemplate *dirp;
582
583
	ino = allocino(request, IFDIR|mode);
584
	dirhead.dot_reclen = htole16(12); /* XXX */
585
	dirhead.dotdot_reclen = htole16(sblock.e2fs_bsize - 12); /* XXX */
586
	dirhead.dot_namlen = 1;
587
	if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
588
	    (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
589
		dirhead.dot_type = EXT2_FT_DIR;
590
	else
591
		dirhead.dot_type = 0;
592
	dirhead.dotdot_namlen = 2;
593
	if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
594
	    (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
595
		dirhead.dotdot_type = EXT2_FT_DIR;
596
	else
597
		dirhead.dotdot_type = 0;
598
	dirp = &dirhead;
599
	dirp->dot_ino = htole32(ino);
600
	dirp->dotdot_ino = htole32(parent);
601
	dp = ginode(ino);
602
	bp = getdirblk(letoh32(dp->e2di_blocks[0]), sblock.e2fs_bsize);
603
	if (bp->b_errs) {
604
		freeino(ino);
605
		return (0);
606
	}
607
	memcpy(bp->b_un.b_buf, dirp, sizeof(struct ext2fs_dirtemplate));
608
	dirty(bp);
609
	dp->e2di_nlink = htole16(2);
610
	inodirty();
611
	if (ino == EXT2_ROOTINO) {
612
		lncntp[ino] = letoh16(dp->e2di_nlink);
613
		cacheino(dp, ino);
614
		return(ino);
615
	}
616
	if (statemap[parent] != DSTATE && statemap[parent] != DFOUND) {
617
		freeino(ino);
618
		return (0);
619
	}
620
	cacheino(dp, ino);
621
	statemap[ino] = statemap[parent];
622
	if (statemap[ino] == DSTATE) {
623
		lncntp[ino] = letoh16(dp->e2di_nlink);
624
		lncntp[parent]++;
625
	}
626
	dp = ginode(parent);
627
	dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) + 1);
628
	inodirty();
629
	return (ino);
630
}
631
632
/*
633
 * free a directory inode
634
 */
635
static void
636
freedir(ino_t ino, ino_t parent)
637
{
638
	struct ext2fs_dinode *dp;
639
640
	if (ino != parent) {
641
		dp = ginode(parent);
642
		dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) - 1);
643
		inodirty();
644
	}
645
	freeino(ino);
646
}
647
648
/*
649
 * generate a temporary name for the lost+found directory.
650
 */
651
static int
652
lftempname(char *bufp, ino_t ino)
653
{
654
	ino_t in;
655
	char *cp;
656
	int namlen;
657
658
	cp = bufp + 2;
659
	for (in = maxino; in > 0; in /= 10)
660
		cp++;
661
	*--cp = 0;
662
	namlen = cp - bufp;
663
	in = ino;
664
	while (cp > bufp) {
665
		*--cp = (in % 10) + '0';
666
		in /= 10;
667
	}
668
	*cp = '#';
669
	return (namlen);
670
}
671
672
/*
673
 * Get a directory block.
674
 * Insure that it is held until another is requested.
675
 */
676
static struct bufarea *
677
getdirblk(daddr32_t blkno, long size)
678
{
679
680
	if (pdirbp != 0)
681
		pdirbp->b_flags &= ~B_INUSE;
682
	pdirbp = getdatablk(blkno, size);
683
	return (pdirbp);
684
}