2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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16 * may be used to endorse or promote products derived from this software
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34 static const char sccsid[] = "@(#)dir.c 8.8 (Berkeley) 4/28/95";
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
42 #include <sys/types.h>
43 #include <sys/sysctl.h>
45 #include <ufs/ufs/dinode.h>
46 #include <ufs/ufs/dir.h>
47 #include <ufs/ffs/fs.h>
54 static struct dirtemplate emptydir = {
55 0, DIRBLKSIZ, DT_UNKNOWN, 0, "",
56 0, 0, DT_UNKNOWN, 0, ""
58 static struct dirtemplate dirhead = {
59 0, 12, DT_DIR, 1, ".",
60 0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
63 static int chgino(struct inodesc *);
64 static int dircheck(struct inodesc *, struct direct *);
65 static int expanddir(union dinode *dp, char *name);
66 static void freedir(ino_t ino, ino_t parent);
67 static struct direct *fsck_readdir(struct inodesc *);
68 static struct bufarea *getdirblk(ufs2_daddr_t blkno, long size);
69 static int lftempname(char *bufp, ino_t ino);
70 static int mkentry(struct inodesc *);
73 * Propagate connected state through the tree.
78 struct inoinfo **inpp, *inp;
79 struct inoinfo **inpend;
82 inpend = &inpsort[inplast];
85 for (inpp = inpsort; inpp < inpend; inpp++) {
87 if (inp->i_parent == 0)
89 if (inoinfo(inp->i_parent)->ino_state == DFOUND &&
90 INO_IS_DUNFOUND(inp->i_number)) {
91 inoinfo(inp->i_number)->ino_state = DFOUND;
99 * Scan each entry in a directory block.
102 dirscan(struct inodesc *idesc)
108 char dbuf[DIRBLKSIZ];
110 if (idesc->id_type != DATA)
111 errx(EEXIT, "wrong type to dirscan %d", idesc->id_type);
112 if (idesc->id_entryno == 0 &&
113 (idesc->id_filesize & (DIRBLKSIZ - 1)) != 0)
114 idesc->id_filesize = roundup(idesc->id_filesize, DIRBLKSIZ);
115 blksiz = idesc->id_numfrags * sblock.fs_fsize;
116 if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
117 idesc->id_filesize -= blksiz;
121 for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
122 dsize = dp->d_reclen;
123 if (dsize > sizeof(dbuf))
124 dsize = sizeof(dbuf);
125 memmove(dbuf, dp, (size_t)dsize);
126 idesc->id_dirp = (struct direct *)dbuf;
127 if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
128 bp = getdirblk(idesc->id_blkno, blksiz);
129 memmove(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf,
138 return (idesc->id_filesize > 0 ? KEEPON : STOP);
142 * get next entry in a directory.
144 static struct direct *
145 fsck_readdir(struct inodesc *idesc)
147 struct direct *dp, *ndp;
149 long size, blksiz, fix, dploc;
151 blksiz = idesc->id_numfrags * sblock.fs_fsize;
152 bp = getdirblk(idesc->id_blkno, blksiz);
153 if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 &&
154 idesc->id_loc < blksiz) {
155 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
156 if (dircheck(idesc, dp))
158 if (idesc->id_fix == IGNORE)
160 fix = dofix(idesc, "DIRECTORY CORRUPTED");
161 bp = getdirblk(idesc->id_blkno, blksiz);
162 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
163 dp->d_reclen = DIRBLKSIZ;
167 dp->d_name[0] = '\0';
170 idesc->id_loc += DIRBLKSIZ;
171 idesc->id_filesize -= DIRBLKSIZ;
175 if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
177 dploc = idesc->id_loc;
178 dp = (struct direct *)(bp->b_un.b_buf + dploc);
179 idesc->id_loc += dp->d_reclen;
180 idesc->id_filesize -= dp->d_reclen;
181 if ((idesc->id_loc % DIRBLKSIZ) == 0)
183 ndp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
184 if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
185 dircheck(idesc, ndp) == 0) {
186 size = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
187 idesc->id_loc += size;
188 idesc->id_filesize -= size;
189 if (idesc->id_fix == IGNORE)
191 fix = dofix(idesc, "DIRECTORY CORRUPTED");
192 bp = getdirblk(idesc->id_blkno, blksiz);
193 dp = (struct direct *)(bp->b_un.b_buf + dploc);
194 dp->d_reclen += size;
202 * Verify that a directory entry is valid.
203 * This is a superset of the checks made in the kernel.
206 dircheck(struct inodesc *idesc, struct direct *dp)
214 spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
215 if (dp->d_reclen == 0 ||
216 dp->d_reclen > spaceleft ||
217 (dp->d_reclen & 0x3) != 0)
221 size = DIRSIZ(0, dp);
222 namlen = dp->d_namlen;
224 if (dp->d_reclen < size ||
225 idesc->id_filesize < size ||
229 for (cp = dp->d_name, size = 0; size < namlen; size++)
230 if (*cp == '\0' || (*cp++ == '/'))
237 printf("Bad dir: ino %d reclen %d namlen %d type %d name %s\n",
238 dp->d_ino, dp->d_reclen, dp->d_namlen, dp->d_type,
244 direrror(ino_t ino, const char *errmesg)
247 fileerror(ino, ino, errmesg);
251 fileerror(ino_t cwd, ino_t ino, const char *errmesg)
254 char pathbuf[MAXPATHLEN + 1];
256 pwarn("%s ", errmesg);
259 getpathname(pathbuf, cwd, ino);
260 if (ino < UFS_ROOTINO || ino > maxino) {
261 pfatal("NAME=%s\n", pathbuf);
267 (DIP(dp, di_mode) & IFMT) == IFDIR ? "DIR" : "FILE",
270 pfatal("NAME=%s\n", pathbuf);
274 adjust(struct inodesc *idesc, int lcnt)
279 dp = ginode(idesc->id_number);
280 if (DIP(dp, di_nlink) == lcnt) {
282 * If we have not hit any unresolved problems, are running
283 * in preen mode, and are on a file system using soft updates,
284 * then just toss any partially allocated files.
286 if (resolved && (preen || bkgrdflag) && usedsoftdep) {
287 clri(idesc, "UNREF", 1);
291 * The file system can be marked clean even if
292 * a file is not linked up, but is cleared.
293 * Hence, resolved should not be cleared when
294 * linkup is answered no, but clri is answered yes.
296 saveresolved = resolved;
297 if (linkup(idesc->id_number, (ino_t)0, NULL) == 0) {
298 resolved = saveresolved;
299 clri(idesc, "UNREF", 0);
303 * Account for the new reference created by linkup().
305 dp = ginode(idesc->id_number);
310 pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
311 ((DIP(dp, di_mode) & IFMT) == IFDIR ? "DIR" : "FILE"));
312 pinode(idesc->id_number);
313 printf(" COUNT %d SHOULD BE %d",
314 DIP(dp, di_nlink), DIP(dp, di_nlink) - lcnt);
315 if (preen || usedsoftdep) {
318 pfatal("LINK COUNT INCREASING");
321 printf(" (ADJUSTED)\n");
323 if (preen || reply("ADJUST") == 1) {
324 if (bkgrdflag == 0) {
325 DIP_SET(dp, di_nlink, DIP(dp, di_nlink) - lcnt);
328 cmd.value = idesc->id_number;
331 printf("adjrefcnt ino %ld amt %lld\n",
333 (long long)cmd.size);
334 if (sysctl(adjrefcnt, MIBSIZE, 0, 0,
335 &cmd, sizeof cmd) == -1)
336 rwerror("ADJUST INODE", cmd.value);
343 mkentry(struct inodesc *idesc)
345 struct direct *dirp = idesc->id_dirp;
346 struct direct newent;
349 newent.d_namlen = strlen(idesc->id_name);
350 newlen = DIRSIZ(0, &newent);
351 if (dirp->d_ino != 0)
352 oldlen = DIRSIZ(0, dirp);
355 if (dirp->d_reclen - oldlen < newlen)
357 newent.d_reclen = dirp->d_reclen - oldlen;
358 dirp->d_reclen = oldlen;
359 dirp = (struct direct *)(((char *)dirp) + oldlen);
360 dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */
361 dirp->d_reclen = newent.d_reclen;
362 dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
363 dirp->d_namlen = newent.d_namlen;
364 memmove(dirp->d_name, idesc->id_name, (size_t)newent.d_namlen + 1);
365 return (ALTERED|STOP);
369 chgino(struct inodesc *idesc)
371 struct direct *dirp = idesc->id_dirp;
373 if (memcmp(dirp->d_name, idesc->id_name, (int)dirp->d_namlen + 1))
375 dirp->d_ino = idesc->id_parent;
376 dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
377 return (ALTERED|STOP);
381 linkup(ino_t orphan, ino_t parentdir, char *name)
386 struct inodesc idesc;
387 char tempname[BUFSIZ];
389 memset(&idesc, 0, sizeof(struct inodesc));
391 lostdir = (DIP(dp, di_mode) & IFMT) == IFDIR;
392 pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
394 if (preen && DIP(dp, di_size) == 0)
396 if (cursnapshot != 0) {
397 pfatal("FILE LINKUP IN SNAPSHOT");
401 printf(" (RECONNECTED)\n");
403 if (reply("RECONNECT") == 0)
406 dp = ginode(UFS_ROOTINO);
407 idesc.id_name = strdup(lfname);
408 idesc.id_type = DATA;
409 idesc.id_func = findino;
410 idesc.id_number = UFS_ROOTINO;
411 if ((ckinode(dp, &idesc) & FOUND) != 0) {
412 lfdir = idesc.id_parent;
414 pwarn("NO lost+found DIRECTORY");
415 if (preen || reply("CREATE")) {
416 lfdir = allocdir(UFS_ROOTINO, (ino_t)0, lfmode);
418 if (makeentry(UFS_ROOTINO, lfdir,
422 printf(" (CREATED)\n");
424 freedir(lfdir, UFS_ROOTINO);
433 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY");
439 if ((DIP(dp, di_mode) & IFMT) != IFDIR) {
440 pfatal("lost+found IS NOT A DIRECTORY");
441 if (reply("REALLOCATE") == 0)
444 if ((lfdir = allocdir(UFS_ROOTINO, (ino_t)0, lfmode)) == 0) {
445 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
448 if ((changeino(UFS_ROOTINO, lfname, lfdir) & ALTERED) == 0) {
449 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
453 idesc.id_type = ADDR;
454 idesc.id_func = pass4check;
455 idesc.id_number = oldlfdir;
456 adjust(&idesc, inoinfo(oldlfdir)->ino_linkcnt + 1);
457 inoinfo(oldlfdir)->ino_linkcnt = 0;
460 if (inoinfo(lfdir)->ino_state != DFOUND) {
461 pfatal("SORRY. NO lost+found DIRECTORY\n\n");
464 (void)lftempname(tempname, orphan);
465 if (makeentry(lfdir, orphan, (name ? name : tempname)) == 0) {
466 pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
470 inoinfo(orphan)->ino_linkcnt--;
472 if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 &&
473 parentdir != (ino_t)-1)
474 (void)makeentry(orphan, lfdir, "..");
476 DIP_SET(dp, di_nlink, DIP(dp, di_nlink) + 1);
478 inoinfo(lfdir)->ino_linkcnt++;
479 pwarn("DIR I=%lu CONNECTED. ", (u_long)orphan);
480 if (parentdir != (ino_t)-1) {
481 printf("PARENT WAS I=%lu\n", (u_long)parentdir);
483 * The parent directory, because of the ordering
484 * guarantees, has had the link count incremented
485 * for the child, but no entry was made. This
486 * fixes the parent link count so that fsck does
487 * not need to be rerun.
489 inoinfo(parentdir)->ino_linkcnt++;
498 * fix an entry in a directory.
501 changeino(ino_t dir, const char *name, ino_t newnum)
503 struct inodesc idesc;
505 memset(&idesc, 0, sizeof(struct inodesc));
506 idesc.id_type = DATA;
507 idesc.id_func = chgino;
508 idesc.id_number = dir;
509 idesc.id_fix = DONTKNOW;
510 idesc.id_name = strdup(name);
511 idesc.id_parent = newnum; /* new value for name */
512 return (ckinode(ginode(dir), &idesc));
516 * make an entry in a directory
519 makeentry(ino_t parent, ino_t ino, const char *name)
522 struct inodesc idesc;
523 char pathbuf[MAXPATHLEN + 1];
525 if (parent < UFS_ROOTINO || parent >= maxino ||
526 ino < UFS_ROOTINO || ino >= maxino)
528 memset(&idesc, 0, sizeof(struct inodesc));
529 idesc.id_type = DATA;
530 idesc.id_func = mkentry;
531 idesc.id_number = parent;
532 idesc.id_parent = ino; /* this is the inode to enter */
533 idesc.id_fix = DONTKNOW;
534 idesc.id_name = strdup(name);
536 if (DIP(dp, di_size) % DIRBLKSIZ) {
537 DIP_SET(dp, di_size, roundup(DIP(dp, di_size), DIRBLKSIZ));
540 if ((ckinode(dp, &idesc) & ALTERED) != 0)
542 getpathname(pathbuf, parent, parent);
544 if (expanddir(dp, pathbuf) == 0)
546 return (ckinode(dp, &idesc) & ALTERED);
550 * Attempt to expand the size of a directory
553 expanddir(union dinode *dp, char *name)
555 ufs2_daddr_t lastbn, newblk;
557 char *cp, firstblk[DIRBLKSIZ];
559 lastbn = lblkno(&sblock, DIP(dp, di_size));
560 if (lastbn >= UFS_NDADDR - 1 || DIP(dp, di_db[lastbn]) == 0 ||
561 DIP(dp, di_size) == 0)
563 if ((newblk = allocblk(sblock.fs_frag)) == 0)
565 DIP_SET(dp, di_db[lastbn + 1], DIP(dp, di_db[lastbn]));
566 DIP_SET(dp, di_db[lastbn], newblk);
567 DIP_SET(dp, di_size, DIP(dp, di_size) + sblock.fs_bsize);
568 DIP_SET(dp, di_blocks, DIP(dp, di_blocks) + btodb(sblock.fs_bsize));
569 bp = getdirblk(DIP(dp, di_db[lastbn + 1]),
570 sblksize(&sblock, DIP(dp, di_size), lastbn + 1));
573 memmove(firstblk, bp->b_un.b_buf, DIRBLKSIZ);
574 bp = getdirblk(newblk, sblock.fs_bsize);
577 memmove(bp->b_un.b_buf, firstblk, DIRBLKSIZ);
578 for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
579 cp < &bp->b_un.b_buf[sblock.fs_bsize];
581 memmove(cp, &emptydir, sizeof emptydir);
583 bp = getdirblk(DIP(dp, di_db[lastbn + 1]),
584 sblksize(&sblock, DIP(dp, di_size), lastbn + 1));
587 memmove(bp->b_un.b_buf, &emptydir, sizeof emptydir);
588 pwarn("NO SPACE LEFT IN %s", name);
590 printf(" (EXPANDED)\n");
591 else if (reply("EXPAND") == 0)
597 DIP_SET(dp, di_db[lastbn], DIP(dp, di_db[lastbn + 1]));
598 DIP_SET(dp, di_db[lastbn + 1], 0);
599 DIP_SET(dp, di_size, DIP(dp, di_size) - sblock.fs_bsize);
600 DIP_SET(dp, di_blocks, DIP(dp, di_blocks) - btodb(sblock.fs_bsize));
601 freeblk(newblk, sblock.fs_frag);
606 * allocate a new directory
609 allocdir(ino_t parent, ino_t request, int mode)
616 struct dirtemplate *dirp;
618 ino = allocino(request, IFDIR|mode);
621 dirp->dotdot_ino = parent;
623 bp = getdirblk(DIP(dp, di_db[0]), sblock.fs_fsize);
628 memmove(bp->b_un.b_buf, dirp, sizeof(struct dirtemplate));
629 for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
630 cp < &bp->b_un.b_buf[sblock.fs_fsize];
632 memmove(cp, &emptydir, sizeof emptydir);
634 DIP_SET(dp, di_nlink, 2);
636 if (ino == UFS_ROOTINO) {
637 inoinfo(ino)->ino_linkcnt = DIP(dp, di_nlink);
641 if (!INO_IS_DVALID(parent)) {
646 inp = getinoinfo(ino);
647 inp->i_parent = parent;
648 inp->i_dotdot = parent;
649 inoinfo(ino)->ino_state = inoinfo(parent)->ino_state;
650 if (inoinfo(ino)->ino_state == DSTATE) {
651 inoinfo(ino)->ino_linkcnt = DIP(dp, di_nlink);
652 inoinfo(parent)->ino_linkcnt++;
655 DIP_SET(dp, di_nlink, DIP(dp, di_nlink) + 1);
661 * free a directory inode
664 freedir(ino_t ino, ino_t parent)
670 DIP_SET(dp, di_nlink, DIP(dp, di_nlink) - 1);
677 * generate a temporary name for the lost+found directory.
680 lftempname(char *bufp, ino_t ino)
687 for (in = maxino; in > 0; in /= 10)
693 *--cp = (in % 10) + '0';
701 * Get a directory block.
702 * Insure that it is held until another is requested.
704 static struct bufarea *
705 getdirblk(ufs2_daddr_t blkno, long size)
709 pdirbp->b_flags &= ~B_INUSE;
710 pdirbp = getdatablk(blkno, size, BT_DIRDATA);