Bug Summary

File:src/sbin/fsck_ext2fs/dir.c
Warning:line 427, column 3
Value stored to 'dp' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name dir.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sbin/fsck_ext2fs/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/sbin/fsck_ext2fs/../fsck -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/sbin/fsck_ext2fs/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/sbin/fsck_ext2fs/dir.c
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
52char *lfname = "lost+found";
53int lfmode = 01777;
54struct ext2fs_dirtemplate emptydir = { 0, DIRBLKSIZ };
55struct ext2fs_dirtemplate dirhead = {
56 0, 12, 1, EXT2_FT_DIR2, ".",
57 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR2, ".."
58};
59#undef DIRBLKSIZ
60
61static int expanddir(struct ext2fs_dinode *, char *);
62static void freedir(ino_t, ino_t);
63static struct ext2fs_direct *fsck_readdir(struct inodesc *);
64static struct bufarea *getdirblk(daddr32_t, long);
65static int lftempname(char *, ino_t);
66static int mkentry(struct inodesc *);
67static int chgino(struct inodesc *);
68
69/*
70 * Propagate connected state through the tree.
71 */
72void
73propagate(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((ufsino_t)2))
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((ufsino_t)2));
93 while (inp) {
94 statemap[inp->i_number] = DFOUND04;
95 if (inp->i_child &&
96 statemap[inp->i_child->i_number] == DSTATE03)
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 */
108int
109dirscan(struct inodesc *idesc)
110{
111 struct ext2fs_direct *dp;
112 struct bufarea *bp;
113 int dsize, n;
114 long blksiz;
115 char *dbuf = NULL((void *)0);
116
117 if ((dbuf = malloc(sblock.e2fs_bsize)) == NULL((void *)0)) {
118 fprintf(stderr(&__sF[2]), "out of memory");
119 exit(8);
120 }
121
122 if (idesc->id_type != DATA1)
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)((((idesc->id_filesize)+((sblock.e2fs_bsize)-1))/(sblock.e2fs_bsize
))*(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 (SKIP0x02);
132 }
133 idesc->id_loc = 0;
134 for (dp = fsck_readdir(idesc); dp != NULL((void *)0); dp = fsck_readdir(idesc)) {
135 dsize = letoh16(dp->e2d_reclen)((__uint16_t)(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)) & ALTERED0x08) {
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)(bp)->b_dirty = 1;
143 sbdirty()copyback_sb(&sblk); sblk.b_dirty = 1;
144 }
145 if (n & STOP0x01) {
146 free(dbuf);
147 return (n);
148 }
149 }
150 free(dbuf);
151 return (idesc->id_filesize > 0 ? KEEPON0x04 : STOP0x01);
152}
153
154/*
155 * get next entry in a directory.
156 */
157static struct ext2fs_direct *
158fsck_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)((__uint16_t)(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)(bp)->b_dirty = 1;
183 idesc->id_loc += sblock.e2fs_bsize;
184 idesc->id_filesize -= sblock.e2fs_bsize;
185 return (dp);
186 }
187dpok:
188 if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
189 return NULL((void *)0);
190 dploc = idesc->id_loc;
191 dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc);
192 idesc->id_loc += letoh16(dp->e2d_reclen)((__uint16_t)(dp->e2d_reclen));
193 idesc->id_filesize -= letoh16(dp->e2d_reclen)((__uint16_t)(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)((__uint16_t)(((__uint16_t)(dp->e2d_reclen)) + size));
208 if (fix)
209 dirty(bp)(bp)->b_dirty = 1;
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 */
218int
219dircheck(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)((__uint16_t)(dp->e2d_reclen));
225
226 spaceleft = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize);
227 if (letoh32(dp->e2d_ino)((__uint32_t)(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_REV11 ||
235 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE0x0002) == 0)
236 if (dp->e2d_type != 0)
237 return (1);
238 size = EXT2FS_DIRSIZ(dp->e2d_namlen)(( 8 + dp->e2d_namlen + 3) &~ 3);
239 if (reclen < size ||
240 idesc->id_filesize < size ||
241 dp->e2d_namlen > EXT2FS_MAXNAMLEN255)
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
249void
250direrror(ino_t ino, char *errmesg)
251{
252
253 fileerror(ino, ino, errmesg);
254}
255
256void
257fileerror(ino_t cwd, ino_t ino, char *errmesg)
258{
259 struct ext2fs_dinode *dp;
260 char pathbuf[PATH_MAX1024 + 1];
261
262 pwarn("%s ", errmesg);
263 pinode(ino);
264 printf("\n");
265 getpathname(pathbuf, sizeof pathbuf, cwd, ino);
266 if ((ino < EXT2_FIRSTINO((ufsino_t)11) && ino != EXT2_ROOTINO((ufsino_t)2)) || 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)((__uint16_t)(dp->e2di_mode)) & IFMT0170000) == IFDIR0040000 ? "DIR" : "FILE", pathbuf);
274 else
275 pfatal("NAME=%s\n", pathbuf);
276}
277
278void
279adjust(struct inodesc *idesc, short lcnt)
280{
281 struct ext2fs_dinode *dp;
282
283 dp = ginode(idesc->id_number);
284 if (letoh16(dp->e2di_nlink)((__uint16_t)(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)((__uint16_t)(dp->e2di_mode)) & IFMT0170000) == IFDIR0040000 ? "DIR" : "FILE"));
290 pinode(idesc->id_number);
291 printf(" COUNT %d SHOULD BE %d",
292 letoh16(dp->e2di_nlink)((__uint16_t)(dp->e2di_nlink)), letoh16(dp->e2di_nlink)((__uint16_t)(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)((__uint16_t)(((__uint16_t)(dp->e2di_nlink)) - lcnt));
302 inodirty();
303 }
304 }
305}
306
307static int
308mkentry(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_UNKNOWN0;
315 newent.e2d_namlen = strlen(idesc->id_name);
316 if (sblock.e2fs.e2fs_rev > E2FS_REV00 &&
317 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE0x0002))
318 newent.e2d_type = inot2ext2dt(typemap[idesc->id_parent]);
319 newlen = EXT2FS_DIRSIZ(newent.e2d_namlen)(( 8 + newent.e2d_namlen + 3) &~ 3);
320 if (dirp->e2d_ino != 0)
321 oldlen = EXT2FS_DIRSIZ(dirp->e2d_namlen)(( 8 + dirp->e2d_namlen + 3) &~ 3);
322 else
323 oldlen = 0;
324 if (letoh16(dirp->e2d_reclen)((__uint16_t)(dirp->e2d_reclen)) - oldlen < newlen)
325 return (KEEPON0x04);
326 newent.e2d_reclen = htole16(letoh16(dirp->e2d_reclen) - oldlen)((__uint16_t)(((__uint16_t)(dirp->e2d_reclen)) - oldlen));
327 dirp->e2d_reclen = htole16(oldlen)((__uint16_t)(oldlen));
328 dirp = (struct ext2fs_direct *)(((char *)dirp) + oldlen);
329 dirp->e2d_ino = htole32(idesc->id_parent)((__uint32_t)(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 (ALTERED0x08|STOP0x01);
335}
336
337static int
338chgino(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 (KEEPON0x04);
346 dirp->e2d_ino = htole32(idesc->id_parent)((__uint32_t)(idesc->id_parent));
347 if (sblock.e2fs.e2fs_rev > E2FS_REV00 &&
348 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE0x0002))
349 dirp->e2d_type = inot2ext2dt(typemap[idesc->id_parent]);
350 else
351 dirp->e2d_type = 0;
352 return (ALTERED0x08|STOP0x01);
353}
354
355int
356linkup(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[BUFSIZ1024];
363
364 memset(&idesc, 0, sizeof(struct inodesc));
365 dp = ginode(orphan);
366 lostdir = (letoh16(dp->e2di_mode)((__uint16_t)(dp->e2di_mode)) & IFMT0170000) == IFDIR0040000;
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((ufsino_t)2));
378 idesc.id_name = lfname;
379 idesc.id_type = DATA1;
380 idesc.id_func = findino;
381 idesc.id_number = EXT2_ROOTINO((ufsino_t)2);
382 if ((ckinode(dp, &idesc) & FOUND0x10) != 0) {
383 lfdir = idesc.id_parent;
384 } else {
385 pwarn("NO lost+found DIRECTORY");
386 if (preen || reply("CREATE")) {
387 lfdir = allocdir(EXT2_ROOTINO((ufsino_t)2), (ino_t)0, lfmode);
388 if (lfdir != 0) {
389 if (makeentry(EXT2_ROOTINO((ufsino_t)2), lfdir, lfname) != 0) {
390 if (preen)
391 printf(" (CREATED)\n");
392 } else {
393 freedir(lfdir, EXT2_ROOTINO((ufsino_t)2));
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)((__uint16_t)(dp->e2di_mode)) & IFMT0170000) != IFDIR0040000) {
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((ufsino_t)2), (ino_t)0, lfmode)) == 0) {
414 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
415 return (0);
416 }
417 if ((changeino(EXT2_ROOTINO((ufsino_t)2), lfname, lfdir) & ALTERED0x08) == 0) {
418 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
419 return (0);
420 }
421 inodirty();
422 idesc.id_type = ADDR2;
423 idesc.id_func = pass4check;
424 idesc.id_number = oldlfdir;
425 adjust(&idesc, lncntp[oldlfdir] + 1);
426 lncntp[oldlfdir] = 0;
427 dp = ginode(lfdir);
Value stored to 'dp' is never read
428 }
429 if (statemap[lfdir] != DFOUND04) {
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) & ALTERED0x08) == 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)((__uint16_t)(((__uint16_t)(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 */
461int
462changeino(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 = DATA1;
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 */
479int
480makeentry(ino_t parent, ino_t ino, char *name)
481{
482 struct ext2fs_dinode *dp;
483 struct inodesc idesc;
484 char pathbuf[PATH_MAX1024 + 1];
485
486 if ((parent < EXT2_FIRSTINO((ufsino_t)11) && parent != EXT2_ROOTINO((ufsino_t)2))
487 || parent >= maxino ||
488 (ino < EXT2_FIRSTINO((ufsino_t)11) && ino < EXT2_ROOTINO((ufsino_t)2)) || ino >= maxino)
489 return (0);
490 memset(&idesc, 0, sizeof(struct inodesc));
491 idesc.id_type = DATA1;
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)((((inosize(dp))+((sblock.e2fs_bsize)-1))/(sblock.e2fs_bsize)
)*(sblock.e2fs_bsize)));
500 inodirty();
501 }
502 if ((ckinode(dp, &idesc) & ALTERED0x08) != 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) & ALTERED0x08);
509}
510
511/*
512 * Attempt to expand the size of a directory
513 */
514static int
515expanddir(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))((inosize(dp)) >> (&sblock)->e2fs_bshift);
522 if (lastbn >= NDADDR12 - 1 || letoh32(dp->e2di_blocks[lastbn])((__uint32_t)(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)((__uint32_t)(newblk));
529 inossize(dp, inosize(dp) + sblock.e2fs_bsize);
530 dp->e2di_nblock = htole32(letoh32(dp->e2di_nblock) + 1)((__uint32_t)(((__uint32_t)(dp->e2di_nblock)) + 1));
531 bp = getdirblk(letoh32(dp->e2di_blocks[lastbn + 1])((__uint32_t)(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((void *)0)) {
536 fprintf(stderr(&__sF[2]), "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)(bp)->b_dirty = 1;
548 bp = getdirblk(letoh32(dp->e2di_blocks[lastbn + 1])((__uint32_t)(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)((__uint16_t)(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)(bp)->b_dirty = 1;
560 inodirty();
561 return (1);
562bad:
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)((__uint32_t)(((__uint32_t)(dp->e2di_size)) - sblock.e2fs_bsize
));
566 inossize(dp, inosize(dp) - sblock.e2fs_bsize);
567 dp->e2di_nblock = htole32(letoh32(dp->e2di_nblock) - 1)((__uint32_t)(((__uint32_t)(dp->e2di_nblock)) - 1));
568 freeblk(newblk);
569 return (0);
570}
571
572/*
573 * allocate a new directory
574 */
575int
576allocdir(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, IFDIR0040000|mode);
584 dirhead.dot_reclen = htole16(12)((__uint16_t)(12)); /* XXX */
585 dirhead.dotdot_reclen = htole16(sblock.e2fs_bsize - 12)((__uint16_t)(sblock.e2fs_bsize - 12)); /* XXX */
586 dirhead.dot_namlen = 1;
587 if (sblock.e2fs.e2fs_rev > E2FS_REV00 &&
588 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE0x0002))
589 dirhead.dot_type = EXT2_FT_DIR2;
590 else
591 dirhead.dot_type = 0;
592 dirhead.dotdot_namlen = 2;
593 if (sblock.e2fs.e2fs_rev > E2FS_REV00 &&
594 (sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE0x0002))
595 dirhead.dotdot_type = EXT2_FT_DIR2;
596 else
597 dirhead.dotdot_type = 0;
598 dirp = &dirhead;
599 dirp->dot_ino = htole32(ino)((__uint32_t)(ino));
600 dirp->dotdot_ino = htole32(parent)((__uint32_t)(parent));
601 dp = ginode(ino);
602 bp = getdirblk(letoh32(dp->e2di_blocks[0])((__uint32_t)(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)(bp)->b_dirty = 1;
609 dp->e2di_nlink = htole16(2)((__uint16_t)(2));
610 inodirty();
611 if (ino == EXT2_ROOTINO((ufsino_t)2)) {
612 lncntp[ino] = letoh16(dp->e2di_nlink)((__uint16_t)(dp->e2di_nlink));
613 cacheino(dp, ino);
614 return(ino);
615 }
616 if (statemap[parent] != DSTATE03 && statemap[parent] != DFOUND04) {
617 freeino(ino);
618 return (0);
619 }
620 cacheino(dp, ino);
621 statemap[ino] = statemap[parent];
622 if (statemap[ino] == DSTATE03) {
623 lncntp[ino] = letoh16(dp->e2di_nlink)((__uint16_t)(dp->e2di_nlink));
624 lncntp[parent]++;
625 }
626 dp = ginode(parent);
627 dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) + 1)((__uint16_t)(((__uint16_t)(dp->e2di_nlink)) + 1));
628 inodirty();
629 return (ino);
630}
631
632/*
633 * free a directory inode
634 */
635static void
636freedir(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)((__uint16_t)(((__uint16_t)(dp->e2di_nlink)) - 1));
643 inodirty();
644 }
645 freeino(ino);
646}
647
648/*
649 * generate a temporary name for the lost+found directory.
650 */
651static int
652lftempname(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 */
676static struct bufarea *
677getdirblk(daddr32_t blkno, long size)
678{
679
680 if (pdirbp != 0)
681 pdirbp->b_flags &= ~B_INUSE1;
682 pdirbp = getdatablk(blkno, size);
683 return (pdirbp);
684}