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/* $NetBSD: dir.c,v 1.20 2006/10/16 03:02:01 christos Exp $ */
/*
* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1997 Manuel Bouyer.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Manuel Bouyer.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)dir.c 8.5 (Berkeley) 12/8/94";
#else
__RCSID("$NetBSD: dir.c,v 1.20 2006/10/16 03:02:01 christos Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <ufs/ufs/dir.h>
#include <ufs/ext2fs/ext2fs_dinode.h>
#include <ufs/ext2fs/ext2fs_dir.h>
#include <ufs/ext2fs/ext2fs.h>
#include <ufs/ufs/dinode.h> /* for IFMT & friends */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include "fsck.h"
#include "fsutil.h"
#include "extern.h"
const char *lfname = "lost+found";
int lfmode = 01777;
struct ext2fs_dirtemplate emptydir = {
.dot_ino = 0,
.dot_reclen = DIRBLKSIZ,
};
struct ext2fs_dirtemplate dirhead = {
.dot_ino = 0,
.dot_reclen = 12,
.dot_namlen = 1,
.dot_type = EXT2_FT_DIR,
.dot_name = ".",
.dotdot_ino = 0,
.dotdot_reclen = DIRBLKSIZ - 12,
.dotdot_namlen = 2,
.dotdot_type = EXT2_FT_DIR,
.dotdot_name = "..",
};
#undef DIRBLKSIZ
static int expanddir(struct ext2fs_dinode *, char *);
static void freedir(ino_t, ino_t);
static struct ext2fs_direct *fsck_readdir(struct inodesc *);
static struct bufarea *getdirblk(daddr_t, long);
static int lftempname(char *, ino_t);
static int mkentry(struct inodesc *);
static int chgino(struct inodesc *);
/*
* Propagate connected state through the tree.
*/
void
propagate(void)
{
struct inoinfo **inpp, *inp, *pinp;
struct inoinfo **inpend;
/*
* Create a list of children for each directory.
*/
inpend = &inpsort[inplast];
for (inpp = inpsort; inpp < inpend; inpp++) {
inp = *inpp;
if (inp->i_parent == 0 ||
inp->i_number == EXT2_ROOTINO)
continue;
pinp = getinoinfo(inp->i_parent);
inp->i_parentp = pinp;
inp->i_sibling = pinp->i_child;
pinp->i_child = inp;
}
inp = getinoinfo(EXT2_ROOTINO);
while (inp) {
statemap[inp->i_number] = DFOUND;
if (inp->i_child &&
statemap[inp->i_child->i_number] == DSTATE)
inp = inp->i_child;
else if (inp->i_sibling)
inp = inp->i_sibling;
else
inp = inp->i_parentp;
}
}
/*
* Scan each entry in a directory block.
*/
int
dirscan(struct inodesc *idesc)
{
struct ext2fs_direct *dp;
struct bufarea *bp;
int dsize, n;
long blksiz;
char *dbuf = NULL;
if ((dbuf = malloc(sblock.e2fs_bsize)) == NULL)
err(8, "Can't allocate directory block");
if (idesc->id_type != DATA)
errexit("wrong type to dirscan %d\n", idesc->id_type);
if (idesc->id_entryno == 0 &&
(idesc->id_filesize & (sblock.e2fs_bsize - 1)) != 0)
idesc->id_filesize = roundup(idesc->id_filesize, sblock.e2fs_bsize);
blksiz = idesc->id_numfrags * sblock.e2fs_bsize;
if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
idesc->id_filesize -= blksiz;
free(dbuf);
return (SKIP);
}
idesc->id_loc = 0;
for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
dsize = fs2h16(dp->e2d_reclen);
memcpy(dbuf, dp, (size_t)dsize);
idesc->id_dirp = (struct ext2fs_direct *)dbuf;
if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
bp = getdirblk(idesc->id_blkno, blksiz);
memcpy(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf,
(size_t)dsize);
dirty(bp);
sbdirty();
}
if (n & STOP) {
free(dbuf);
return (n);
}
}
free(dbuf);
return (idesc->id_filesize > 0 ? KEEPON : STOP);
}
/*
* get next entry in a directory.
*/
static struct ext2fs_direct *
fsck_readdir(struct inodesc *idesc)
{
struct ext2fs_direct *dp, *ndp;
struct bufarea *bp;
long size, blksiz, fix, dploc;
blksiz = idesc->id_numfrags * sblock.e2fs_bsize;
bp = getdirblk(idesc->id_blkno, blksiz);
if (idesc->id_loc % sblock.e2fs_bsize == 0 && idesc->id_filesize > 0 &&
idesc->id_loc < blksiz) {
dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
if (dircheck(idesc, dp))
goto dpok;
if (idesc->id_fix == IGNORE)
return (0);
fix = dofix(idesc, "DIRECTORY CORRUPTED");
bp = getdirblk(idesc->id_blkno, blksiz);
dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
dp->e2d_reclen = h2fs16(sblock.e2fs_bsize);
dp->e2d_ino = 0;
dp->e2d_namlen = 0;
dp->e2d_type = 0;
dp->e2d_name[0] = '\0';
if (fix)
dirty(bp);
idesc->id_loc += sblock.e2fs_bsize;
idesc->id_filesize -= sblock.e2fs_bsize;
return (dp);
}
dpok:
if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
return NULL;
dploc = idesc->id_loc;
dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc);
idesc->id_loc += fs2h16(dp->e2d_reclen);
idesc->id_filesize -= fs2h16(dp->e2d_reclen);
if ((idesc->id_loc % sblock.e2fs_bsize) == 0)
return (dp);
ndp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
dircheck(idesc, ndp) == 0) {
size = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize);
idesc->id_loc += size;
idesc->id_filesize -= size;
if (idesc->id_fix == IGNORE)
return (0);
fix = dofix(idesc, "DIRECTORY CORRUPTED");
bp = getdirblk(idesc->id_blkno, blksiz);
dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc);
dp->e2d_reclen = h2fs16(fs2h16(dp->e2d_reclen) + size);
if (fix)
dirty(bp);
}
return (dp);
}
/*
* Verify that a directory entry is valid.
* This is a superset of the checks made in the kernel.
*/
int
dircheck(struct inodesc *idesc, struct ext2fs_direct *dp)
{
int size;
char *cp;
int spaceleft;
u_int16_t reclen = fs2h16(dp->e2d_reclen);
spaceleft = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize);
if (fs2h32(dp->e2d_ino) > maxino ||
reclen == 0 ||
reclen > spaceleft ||
(reclen & 0x3) != 0)
return (0);
if (dp->e2d_ino == 0)
return (1);
if (sblock.e2fs.e2fs_rev < E2FS_REV1 ||
(sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE) == 0)
if (dp->e2d_type != 0)
return (1);
size = EXT2FS_DIRSIZ(dp->e2d_namlen);
if (reclen < size ||
idesc->id_filesize < size /* ||
dp->e2d_namlen > EXT2FS_MAXNAMLEN */)
return (0);
for (cp = dp->e2d_name, size = 0; size < dp->e2d_namlen; size++)
if (*cp == '\0' || (*cp++ == '/'))
return (0);
return (1);
}
void
direrror(ino_t ino, const char *errmesg)
{
fileerror(ino, ino, errmesg);
}
void
fileerror(ino_t cwd, ino_t ino, const char *errmesg)
{
struct ext2fs_dinode *dp;
char pathbuf[MAXPATHLEN + 1];
pwarn("%s ", errmesg);
pinode(ino);
printf("\n");
getpathname(pathbuf, sizeof(pathbuf), cwd, ino);
if ((ino < EXT2_FIRSTINO && ino != EXT2_ROOTINO) || ino > maxino) {
pfatal("NAME=%s\n", pathbuf);
return;
}
dp = ginode(ino);
if (ftypeok(dp))
pfatal("%s=%s\n",
(fs2h16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf);
else
pfatal("NAME=%s\n", pathbuf);
}
void
adjust(struct inodesc *idesc, short lcnt)
{
struct ext2fs_dinode *dp;
dp = ginode(idesc->id_number);
if (fs2h16(dp->e2di_nlink) == lcnt) {
if (linkup(idesc->id_number, (ino_t)0) == 0)
clri(idesc, "UNREF", 0);
} else {
pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
((fs2h16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE"));
pinode(idesc->id_number);
printf(" COUNT %d SHOULD BE %d",
fs2h16(dp->e2di_nlink), fs2h16(dp->e2di_nlink) - lcnt);
if (preen) {
if (lcnt < 0) {
printf("\n");
pfatal("LINK COUNT INCREASING");
}
printf(" (ADJUSTED)\n");
}
if (preen || reply("ADJUST") == 1) {
dp->e2di_nlink = h2fs16(fs2h16(dp->e2di_nlink) - lcnt);
inodirty();
}
}
}
static int
mkentry(struct inodesc *idesc)
{
struct ext2fs_direct *dirp = idesc->id_dirp;
struct ext2fs_direct newent;
int newlen, oldlen;
newent.e2d_type = 0; /* XXX gcc */
newent.e2d_namlen = strlen(idesc->id_name);
if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
(sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
newent.e2d_type = inot2ext2dt(typemap[idesc->id_parent]);
newlen = EXT2FS_DIRSIZ(newent.e2d_namlen);
if (dirp->e2d_ino != 0)
oldlen = EXT2FS_DIRSIZ(dirp->e2d_namlen);
else
oldlen = 0;
if (fs2h16(dirp->e2d_reclen) - oldlen < newlen)
return (KEEPON);
newent.e2d_reclen = h2fs16(fs2h16(dirp->e2d_reclen) - oldlen);
dirp->e2d_reclen = h2fs16(oldlen);
dirp = (struct ext2fs_direct *)(((char *)dirp) + oldlen);
dirp->e2d_ino = h2fs32(idesc->id_parent); /* ino to be entered is in id_parent */
dirp->e2d_reclen = newent.e2d_reclen;
dirp->e2d_namlen = newent.e2d_namlen;
dirp->e2d_type = newent.e2d_type;
memcpy(dirp->e2d_name, idesc->id_name, (size_t)(dirp->e2d_namlen));
return (ALTERED|STOP);
}
static int
chgino(struct inodesc *idesc)
{
struct ext2fs_direct *dirp = idesc->id_dirp;
u_int16_t namlen = dirp->e2d_namlen;
if (strlen(idesc->id_name) != namlen ||
strncmp(dirp->e2d_name, idesc->id_name, (int)namlen))
return (KEEPON);
dirp->e2d_ino = h2fs32(idesc->id_parent);
if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
(sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
dirp->e2d_type = inot2ext2dt(typemap[idesc->id_parent]);
else
dirp->e2d_type = 0;
return (ALTERED|STOP);
}
int
linkup(ino_t orphan, ino_t parentdir)
{
struct ext2fs_dinode *dp;
int lostdir;
ino_t oldlfdir;
struct inodesc idesc;
char tempname[BUFSIZ];
memset(&idesc, 0, sizeof(struct inodesc));
dp = ginode(orphan);
lostdir = (fs2h16(dp->e2di_mode) & IFMT) == IFDIR;
pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
pinode(orphan);
if (preen && inosize(dp) == 0)
return (0);
if (preen)
printf(" (RECONNECTED)\n");
else
if (reply("RECONNECT") == 0)
return (0);
if (lfdir == 0) {
dp = ginode(EXT2_ROOTINO);
idesc.id_name = lfname;
idesc.id_type = DATA;
idesc.id_func = findino;
idesc.id_number = EXT2_ROOTINO;
if ((ckinode(dp, &idesc) & FOUND) != 0) {
lfdir = idesc.id_parent;
} else {
pwarn("NO lost+found DIRECTORY");
if (preen || reply("CREATE")) {
lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode);
if (lfdir != 0) {
if (makeentry(EXT2_ROOTINO, lfdir, lfname) != 0) {
if (preen)
printf(" (CREATED)\n");
} else {
freedir(lfdir, EXT2_ROOTINO);
lfdir = 0;
if (preen)
printf("\n");
}
}
}
}
if (lfdir == 0) {
pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY");
printf("\n\n");
return (0);
}
}
dp = ginode(lfdir);
if ((fs2h16(dp->e2di_mode) & IFMT) != IFDIR) {
pfatal("lost+found IS NOT A DIRECTORY");
if (reply("REALLOCATE") == 0)
return (0);
oldlfdir = lfdir;
if ((lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode)) == 0) {
pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
return (0);
}
if ((changeino(EXT2_ROOTINO, lfname, lfdir) & ALTERED) == 0) {
pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
return (0);
}
inodirty();
idesc.id_type = ADDR;
idesc.id_func = pass4check;
idesc.id_number = oldlfdir;
adjust(&idesc, lncntp[oldlfdir] + 1);
lncntp[oldlfdir] = 0;
dp = ginode(lfdir);
}
if (statemap[lfdir] != DFOUND) {
pfatal("SORRY. NO lost+found DIRECTORY\n\n");
return (0);
}
(void)lftempname(tempname, orphan);
if (makeentry(lfdir, orphan, tempname) == 0) {
pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
printf("\n\n");
return (0);
}
lncntp[orphan]--;
if (lostdir) {
if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 &&
parentdir != (ino_t)-1)
(void)makeentry(orphan, lfdir, "..");
dp = ginode(lfdir);
dp->e2di_nlink = h2fs16(fs2h16(dp->e2di_nlink) +1);
inodirty();
lncntp[lfdir]++;
pwarn("DIR I=%llu CONNECTED. ", (unsigned long long)orphan);
if (parentdir != (ino_t)-1)
printf("PARENT WAS I=%llu\n",
(unsigned long long)parentdir);
if (preen == 0)
printf("\n");
}
return (1);
}
/*
* fix an entry in a directory.
*/
int
changeino(ino_t dir, const char *name, ino_t newnum)
{
struct inodesc idesc;
memset(&idesc, 0, sizeof(struct inodesc));
idesc.id_type = DATA;
idesc.id_func = chgino;
idesc.id_number = dir;
idesc.id_fix = DONTKNOW;
idesc.id_name = name;
idesc.id_parent = newnum; /* new value for name */
return (ckinode(ginode(dir), &idesc));
}
/*
* make an entry in a directory
*/
int
makeentry(ino_t parent, ino_t ino, const char *name)
{
struct ext2fs_dinode *dp;
struct inodesc idesc;
char pathbuf[MAXPATHLEN + 1];
if ((parent < EXT2_FIRSTINO && parent != EXT2_ROOTINO)
|| parent >= maxino ||
(ino < EXT2_FIRSTINO && ino < EXT2_ROOTINO) || ino >= maxino)
return (0);
memset(&idesc, 0, sizeof(struct inodesc));
idesc.id_type = DATA;
idesc.id_func = mkentry;
idesc.id_number = parent;
idesc.id_parent = ino; /* this is the inode to enter */
idesc.id_fix = DONTKNOW;
idesc.id_name = name;
dp = ginode(parent);
if (inosize(dp) % sblock.e2fs_bsize) {
inossize(dp, roundup(inosize(dp), sblock.e2fs_bsize));
inodirty();
}
if ((ckinode(dp, &idesc) & ALTERED) != 0)
return (1);
getpathname(pathbuf, sizeof(pathbuf), parent, parent);
dp = ginode(parent);
if (expanddir(dp, pathbuf) == 0)
return (0);
return (ckinode(dp, &idesc) & ALTERED);
}
/*
* Attempt to expand the size of a directory
*/
static int
expanddir(struct ext2fs_dinode *dp, char *name)
{
daddr_t lastbn, newblk;
struct bufarea *bp;
char *firstblk;
lastbn = lblkno(&sblock, inosize(dp));
if (lastbn >= NDADDR - 1 || fs2h32(dp->e2di_blocks[lastbn]) == 0 ||
inosize(dp) == 0) {
return (0);
}
if ((newblk = allocblk()) == 0) {
return (0);
}
dp->e2di_blocks[lastbn + 1] = dp->e2di_blocks[lastbn];
dp->e2di_blocks[lastbn] = h2fs32(newblk);
inossize(dp, inosize(dp) + sblock.e2fs_bsize);
dp->e2di_nblock = h2fs32(fs2h32(dp->e2di_nblock) + 1);
bp = getdirblk(fs2h32(dp->e2di_blocks[lastbn + 1]),
sblock.e2fs_bsize);
if (bp->b_errs)
goto bad;
if ((firstblk = malloc(sblock.e2fs_bsize)) == NULL)
err(8, "cannot allocate first block");
memcpy(firstblk, bp->b_un.b_buf, sblock.e2fs_bsize);
bp = getdirblk(newblk, sblock.e2fs_bsize);
if (bp->b_errs) {
free(firstblk);
goto bad;
}
memcpy(bp->b_un.b_buf, firstblk, sblock.e2fs_bsize);
free(firstblk);
dirty(bp);
bp = getdirblk(fs2h32(dp->e2di_blocks[lastbn + 1]),
sblock.e2fs_bsize);
if (bp->b_errs)
goto bad;
emptydir.dot_reclen = h2fs16(sblock.e2fs_bsize);
memcpy(bp->b_un.b_buf, &emptydir, sizeof emptydir);
pwarn("NO SPACE LEFT IN %s", name);
if (preen)
printf(" (EXPANDED)\n");
else if (reply("EXPAND") == 0)
goto bad;
dirty(bp);
inodirty();
return (1);
bad:
dp->e2di_blocks[lastbn] = dp->e2di_blocks[lastbn + 1];
dp->e2di_blocks[lastbn + 1] = 0;
inossize(dp, inosize(dp) - sblock.e2fs_bsize);
dp->e2di_nblock = h2fs32(fs2h32(dp->e2di_nblock) - 1);
freeblk(newblk);
return (0);
}
/*
* allocate a new directory
*/
int
allocdir(ino_t parent, ino_t request, int mode)
{
ino_t ino;
struct ext2fs_dinode *dp;
struct bufarea *bp;
struct ext2fs_dirtemplate *dirp;
ino = allocino(request, IFDIR|mode);
dirhead.dot_reclen = h2fs16(12); /* XXX */
dirhead.dotdot_reclen = h2fs16(sblock.e2fs_bsize - 12); /* XXX */
dirhead.dot_namlen = 1;
if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
(sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
dirhead.dot_type = EXT2_FT_DIR;
else
dirhead.dot_type = 0;
dirhead.dotdot_namlen = 2;
if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
(sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
dirhead.dotdot_type = EXT2_FT_DIR;
else
dirhead.dotdot_type = 0;
dirp = &dirhead;
dirp->dot_ino = h2fs32(ino);
dirp->dotdot_ino = h2fs32(parent);
dp = ginode(ino);
bp = getdirblk(fs2h32(dp->e2di_blocks[0]), sblock.e2fs_bsize);
if (bp->b_errs) {
freeino(ino);
return (0);
}
memcpy(bp->b_un.b_buf, dirp, sizeof(struct ext2fs_dirtemplate));
dirty(bp);
dp->e2di_nlink = h2fs16(2);
inodirty();
if (ino == EXT2_ROOTINO) {
lncntp[ino] = fs2h16(dp->e2di_nlink);
cacheino(dp, ino);
return(ino);
}
if (statemap[parent] != DSTATE && statemap[parent] != DFOUND) {
freeino(ino);
return (0);
}
cacheino(dp, ino);
statemap[ino] = statemap[parent];
if (statemap[ino] == DSTATE) {
lncntp[ino] = fs2h16(dp->e2di_nlink);
lncntp[parent]++;
}
dp = ginode(parent);
dp->e2di_nlink = h2fs16(fs2h16(dp->e2di_nlink) + 1);
inodirty();
return (ino);
}
/*
* free a directory inode
*/
static void
freedir(ino_t ino, ino_t parent)
{
struct ext2fs_dinode *dp;
if (ino != parent) {
dp = ginode(parent);
dp->e2di_nlink = h2fs16(fs2h16(dp->e2di_nlink) - 1);
inodirty();
}
freeino(ino);
}
/*
* generate a temporary name for the lost+found directory.
*/
static int
lftempname(char *bufp, ino_t ino)
{
ino_t in;
char *cp;
int namlen;
cp = bufp + 2;
for (in = maxino; in > 0; in /= 10)
cp++;
*--cp = 0;
namlen = cp - bufp;
in = ino;
while (cp > bufp) {
*--cp = (in % 10) + '0';
in /= 10;
}
*cp = '#';
return (namlen);
}
/*
* Get a directory block.
* Insure that it is held until another is requested.
*/
static struct bufarea *
getdirblk(daddr_t blkno, long size)
{
if (pdirbp != 0)
pdirbp->b_flags &= ~B_INUSE;
pdirbp = getdatablk(blkno, size);
return (pdirbp);
}
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