/*
 * 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.
 *
 * @(#)dir.c    8.8 (Berkeley) 4/28/95
 * $FreeBSD: src/sbin/fsck/dir.c,v 1.15 1999/08/28 00:12:45 peter Exp $
 */

#include <sys/param.h>
#include <sys/time.h>

#include <vfs/ufs/dinode.h>
#include <vfs/ufs/dir.h>
#include <vfs/ufs/fs.h>

#include <err.h>
#include <string.h>

#include "fsck.h"

struct bufarea *pdirbp;         /* current directory contents */
ufs1_ino_t      lfdir;                  /* lost & found directory inode number */

char    *lfname = "lost+found";
int     lfmode = 01777;
struct  dirtemplate emptydir = { 0, DIRBLKSIZ };
struct  dirtemplate dirhead = {
        0, 12, DT_DIR, 1, ".",
        0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
};
struct  odirtemplate odirhead = {
        0, 12, 1, ".",
        0, DIRBLKSIZ - 12, 2, ".."
};

static int chgino(struct inodesc *);
static int dircheck(struct inodesc *, struct direct *);
static int expanddir(struct ufs1_dinode *dp, char *name);
static void freedir(ufs1_ino_t ino, ufs1_ino_t parent);
static struct direct *fsck_readdir(struct inodesc *);
static struct bufarea *getdirblk(ufs_daddr_t blkno, long size);
static int lftempname(char *bufp, ufs1_ino_t ino);
static int mkentry(struct inodesc *);

/*
 * Propagate connected state through the tree.
 */
void
propagate(void)
{
        struct inoinfo **inpp, *inp;
        struct inoinfo **inpend;
        long change;

        inpend = &inpsort[inplast];
        do {
                change = 0;
                for (inpp = inpsort; inpp < inpend; inpp++) {
                        inp = *inpp;
                        if (inp->i_parent == 0)
                                continue;
                        if (inoinfo(inp->i_parent)->ino_state == DFOUND &&
                            inoinfo(inp->i_number)->ino_state == DSTATE) {
                                inoinfo(inp->i_number)->ino_state = DFOUND;
                                change++;
                        }
                }
        } while (change > 0);
}

/*
 * Scan each entry in a directory block.
 */
int
dirscan(struct inodesc *idesc)
{
        struct direct *dp;
        struct bufarea *bp;
        unsigned int dsize, n;
        long blksiz;
        char dbuf[DIRBLKSIZ];

        if (idesc->id_type != DATA)
                errx(EEXIT, "wrong type to dirscan %d", idesc->id_type);
        if (idesc->id_entryno == 0 &&
            (idesc->id_filesize & (DIRBLKSIZ - 1)) != 0)
                idesc->id_filesize = roundup(idesc->id_filesize, DIRBLKSIZ);
        blksiz = idesc->id_numfrags * sblock.fs_fsize;
        if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
                idesc->id_filesize -= blksiz;
                return (SKIP);
        }
        idesc->id_loc = 0;
        for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
                dsize = dp->d_reclen;
                if (dsize > sizeof(dbuf))
                        dsize = sizeof(dbuf);
                memmove(dbuf, dp, (size_t)dsize);
#               if (BYTE_ORDER == LITTLE_ENDIAN)
                        if (!newinofmt) {
                                struct direct *tdp = (struct direct *)dbuf;
                                u_char tmp;

                                tmp = tdp->d_namlen;
                                tdp->d_namlen = tdp->d_type;
                                tdp->d_type = tmp;
                        }
#               endif
                idesc->id_dirp = (struct direct *)dbuf;
                if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
#                       if (BYTE_ORDER == LITTLE_ENDIAN)
                                if (!newinofmt && !doinglevel2) {
                                        struct direct *tdp;
                                        u_char tmp;

                                        tdp = (struct direct *)dbuf;
                                        tmp = tdp->d_namlen;
                                        tdp->d_namlen = tdp->d_type;
                                        tdp->d_type = tmp;
                                }
#                       endif
                        bp = getdirblk(idesc->id_blkno, blksiz);
                        memmove(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf,
                            (size_t)dsize);
                        dirty(bp);
                        sbdirty();
                }
                if (n & STOP)
                        return (n);
        }
        return (idesc->id_filesize > 0 ? KEEPON : STOP);
}

/*
 * get next entry in a directory.
 */
static struct direct *
fsck_readdir(struct inodesc *idesc)
{
        struct direct *dp, *ndp;
        struct bufarea *bp;
        long size, blksiz, fix, dploc;

        blksiz = idesc->id_numfrags * sblock.fs_fsize;
        bp = getdirblk(idesc->id_blkno, blksiz);
        if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 &&
            idesc->id_loc < blksiz) {
                dp = (struct 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 direct *)(bp->b_un.b_buf + idesc->id_loc);
                dp->d_reclen = DIRBLKSIZ;
                dp->d_ino = 0;
                dp->d_type = 0;
                dp->d_namlen = 0;
                dp->d_name[0] = '\0';
                if (fix)
                        dirty(bp);
                idesc->id_loc += DIRBLKSIZ;
                idesc->id_filesize -= DIRBLKSIZ;
                return (dp);
        }
dpok:
        if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
                return NULL;
        dploc = idesc->id_loc;
        dp = (struct direct *)(bp->b_un.b_buf + dploc);
        idesc->id_loc += dp->d_reclen;
        idesc->id_filesize -= dp->d_reclen;
        if ((idesc->id_loc % DIRBLKSIZ) == 0)
                return (dp);
        ndp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
        if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
            dircheck(idesc, ndp) == 0) {
                size = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
                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 direct *)(bp->b_un.b_buf + dploc);
                dp->d_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.
 */
static int
dircheck(struct inodesc *idesc, struct direct *dp)
{
        int size;
        char *cp;
        u_char namlen, type;
        int spaceleft;

        spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
        if (dp->d_reclen == 0 ||
            dp->d_reclen > spaceleft ||
            (dp->d_reclen & 0x3) != 0)
                return (0);
        if (dp->d_ino == 0)
                return (1);
        size = DIRSIZ(!newinofmt, dp);
#       if (BYTE_ORDER == LITTLE_ENDIAN)
                if (!newinofmt) {
                        type = dp->d_namlen;
                        namlen = dp->d_type;
                } else {
                        namlen = dp->d_namlen;
                        type = dp->d_type;
                }
#       else
                namlen = dp->d_namlen;
                type = dp->d_type;
#       endif
        if (dp->d_reclen < size ||
            idesc->id_filesize < size ||
            type > 15)
                return (0);
        for (cp = dp->d_name, size = 0; size < namlen; size++)
                if (*cp == '\0' || (*cp++ == '/'))
                        return (0);
        if (*cp != '\0')
                return (0);
        return (1);
}

void
direrror(ufs1_ino_t ino, char *errmesg)
{

        fileerror(ino, ino, errmesg);
}

void
fileerror(ufs1_ino_t cwd, ufs1_ino_t ino, char *errmesg)
{
        struct ufs1_dinode *dp;
        char pathbuf[MAXPATHLEN + 1];

        pwarn("%s ", errmesg);
        pinode(ino);
        printf("\n");
        getpathname(pathbuf, cwd, ino);
        if (ino < UFS_ROOTINO || ino > maxino) {
                pfatal("NAME=%s\n", pathbuf);
                return;
        }
        dp = ginode(ino);
        if (ftypeok(dp))
                pfatal("%s=%s\n",
                    (dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf);
        else
                pfatal("NAME=%s\n", pathbuf);
}

void
adjust(struct inodesc *idesc, int lcnt)
{
        struct ufs1_dinode *dp;
        int saveresolved;

        dp = ginode(idesc->id_number);
        if (dp->di_nlink == lcnt) {
                /*
                 * If we have not hit any unresolved problems, are running
                 * in preen mode, and are on a filesystem using soft updates,
                 * then just toss any partially allocated files.
                 */
                if (resolved && preen && usedsoftdep) {
                        clri(idesc, "UNREF", 1);
                        return;
                } else {
                        /*
                         * The filesystem can be marked clean even if
                         * a file is not linked up, but is cleared.
                         * Hence, resolved should not be cleared when
                         * linkup is answered no, but clri is answered yes.
                         */
                        saveresolved = resolved;
                        if (linkup(idesc->id_number, (ufs1_ino_t)0, NULL) == 0) {
                                resolved = saveresolved;
                                clri(idesc, "UNREF", 0);
                                return;
                        }
                        /*
                         * Account for the new reference created by linkup().
                         */
                        dp = ginode(idesc->id_number);
                        lcnt--;
                }
        }
        if (lcnt != 0) {
                pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
                        ((dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE"));
                pinode(idesc->id_number);
                printf(" COUNT %d SHOULD BE %d",
                        dp->di_nlink, dp->di_nlink - lcnt);
                if (preen || usedsoftdep) {
                        if (lcnt < 0) {
                                printf("\n");
                                pfatal("LINK COUNT INCREASING");
                        }
                        if (preen)
                                printf(" (ADJUSTED)\n");
                }
                if (preen || reply("ADJUST") == 1) {
                        dp->di_nlink -= lcnt;
                        inodirty();
                }
        }
}

static int
mkentry(struct inodesc *idesc)
{
        struct direct *dirp = idesc->id_dirp;
        struct direct newent;
        int newlen, oldlen;

        newent.d_namlen = strlen(idesc->id_name);
        newlen = DIRSIZ(0, &newent);
        if (dirp->d_ino != 0)
                oldlen = DIRSIZ(0, dirp);
        else
                oldlen = 0;
        if (dirp->d_reclen - oldlen < newlen)
                return (KEEPON);
        newent.d_reclen = dirp->d_reclen - oldlen;
        dirp->d_reclen = oldlen;
        dirp = (struct direct *)(((char *)dirp) + oldlen);
        dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */
        dirp->d_reclen = newent.d_reclen;
        if (newinofmt)
                dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
        else
                dirp->d_type = 0;
        dirp->d_namlen = newent.d_namlen;
        memmove(dirp->d_name, idesc->id_name, (size_t)newent.d_namlen + 1);
#       if (BYTE_ORDER == LITTLE_ENDIAN)
                /*
                 * If the entry was split, dirscan() will only reverse the byte
                 * order of the original entry, and not the new one, before
                 * writing it back out.  So, we reverse the byte order here if
                 * necessary.
                 */
                if (oldlen != 0 && !newinofmt && !doinglevel2) {
                        u_char tmp;

                        tmp = dirp->d_namlen;
                        dirp->d_namlen = dirp->d_type;
                        dirp->d_type = tmp;
                }
#       endif
        return (ALTERED|STOP);
}

static int
chgino(struct inodesc *idesc)
{
        struct direct *dirp = idesc->id_dirp;

        if (memcmp(dirp->d_name, idesc->id_name, (int)dirp->d_namlen + 1))
                return (KEEPON);
        dirp->d_ino = idesc->id_parent;
        if (newinofmt)
                dirp->d_type = inoinfo(idesc->id_parent)->ino_type;
        else
                dirp->d_type = 0;
        return (ALTERED|STOP);
}

int
linkup(ufs1_ino_t orphan, ufs1_ino_t parentdir, char *name)
{
        struct ufs1_dinode *dp;
        int lostdir;
        ufs1_ino_t oldlfdir;
        struct inodesc idesc;
        char tempname[BUFSIZ];

        memset(&idesc, 0, sizeof(struct inodesc));
        dp = ginode(orphan);
        lostdir = (dp->di_mode & IFMT) == IFDIR;
        pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
        pinode(orphan);
        if (preen && dp->di_size == 0)
                return (0);
        if (preen)
                printf(" (RECONNECTED)\n");
        else
                if (reply("RECONNECT") == 0)
                        return (0);
        if (lfdir == 0) {
                dp = ginode(UFS_ROOTINO);
                idesc.id_name = lfname;
                idesc.id_type = DATA;
                idesc.id_func = findino;
                idesc.id_number = UFS_ROOTINO;
                if ((ckinode(dp, &idesc) & FOUND) != 0) {
                        lfdir = idesc.id_parent;
                } else {
                        pwarn("NO lost+found DIRECTORY");
                        if (preen || reply("CREATE")) {
                                lfdir = allocdir(UFS_ROOTINO, (ufs1_ino_t)0,
                                    lfmode);
                                if (lfdir != 0) {
                                        if (makeentry(UFS_ROOTINO, lfdir, lfname) != 0) {
                                                numdirs++;
                                                if (preen)
                                                        printf(" (CREATED)\n");
                                        } else {
                                                freedir(lfdir, UFS_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 ((dp->di_mode & IFMT) != IFDIR) {
                pfatal("lost+found IS NOT A DIRECTORY");
                if (reply("REALLOCATE") == 0)
                        return (0);
                oldlfdir = lfdir;
                if ((lfdir = allocdir(UFS_ROOTINO, (ufs1_ino_t)0, lfmode)) == 0) {
                        pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
                        return (0);
                }
                if ((changeino(UFS_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, inoinfo(oldlfdir)->ino_linkcnt + 1);
                inoinfo(oldlfdir)->ino_linkcnt = 0;
                dp = ginode(lfdir);
        }
        if (inoinfo(lfdir)->ino_state != DFOUND) {
                pfatal("SORRY. NO lost+found DIRECTORY\n\n");
                return (0);
        }
        lftempname(tempname, orphan);
        if (makeentry(lfdir, orphan, (name ? name : tempname)) == 0) {
                pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
                printf("\n\n");
                return (0);
        }
        inoinfo(orphan)->ino_linkcnt--;
        if (lostdir) {
                if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 &&
                    parentdir != (ufs1_ino_t)-1)
                        makeentry(orphan, lfdir, "..");
                dp = ginode(lfdir);
                dp->di_nlink++;
                inodirty();
                inoinfo(lfdir)->ino_linkcnt++;
                pwarn("DIR I=%u CONNECTED. ", orphan);
                if (parentdir != (ufs1_ino_t)-1) {
                        printf("PARENT WAS I=%lu\n", (u_long)parentdir);
                        /*
                         * The parent directory, because of the ordering
                         * guarantees, has had the link count incremented
                         * for the child, but no entry was made.  This
                         * fixes the parent link count so that fsck does
                         * not need to be rerun.
                         */
                        inoinfo(parentdir)->ino_linkcnt++;
                }
                if (preen == 0)
                        printf("\n");
        }
        return (1);
}

/*
 * fix an entry in a directory.
 */
int
changeino(ufs1_ino_t dir, char *name, ufs1_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(ufs1_ino_t parent, ufs1_ino_t ino, char *name)
{
        struct ufs1_dinode *dp;
        struct inodesc idesc;
        char pathbuf[MAXPATHLEN + 1];

        if (parent < UFS_ROOTINO || parent >= maxino ||
            ino < UFS_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 (dp->di_size % DIRBLKSIZ) {
                dp->di_size = roundup(dp->di_size, DIRBLKSIZ);
                inodirty();
        }
        if ((ckinode(dp, &idesc) & ALTERED) != 0)
                return (1);
        getpathname(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 ufs1_dinode *dp, char *name)
{
        ufs_daddr_t lastbn, newblk;
        struct bufarea *bp;
        char *cp, firstblk[DIRBLKSIZ];

        lastbn = lblkno(&sblock, dp->di_size);
        if (lastbn >= UFS_NDADDR - 1 || dp->di_db[lastbn] == 0 ||
            dp->di_size == 0)
                return (0);
        if ((newblk = allocblk(sblock.fs_frag)) == 0)
                return (0);
        dp->di_db[lastbn + 1] = dp->di_db[lastbn];
        dp->di_db[lastbn] = newblk;
        dp->di_size += sblock.fs_bsize;
        dp->di_blocks += btodb(sblock.fs_bsize);
        bp = getdirblk(dp->di_db[lastbn + 1],
                (long)dblksize(&sblock, dp, lastbn + 1));
        if (bp->b_errs)
                goto bad;
        memmove(firstblk, bp->b_un.b_buf, DIRBLKSIZ);
        bp = getdirblk(newblk, sblock.fs_bsize);
        if (bp->b_errs)
                goto bad;
        memmove(bp->b_un.b_buf, firstblk, DIRBLKSIZ);
        for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
             cp < &bp->b_un.b_buf[sblock.fs_bsize];
             cp += DIRBLKSIZ)
                memmove(cp, &emptydir, sizeof emptydir);
        dirty(bp);
        bp = getdirblk(dp->di_db[lastbn + 1],
                (long)dblksize(&sblock, dp, lastbn + 1));
        if (bp->b_errs)
                goto bad;
        memmove(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->di_db[lastbn] = dp->di_db[lastbn + 1];
        dp->di_db[lastbn + 1] = 0;
        dp->di_size -= sblock.fs_bsize;
        dp->di_blocks -= btodb(sblock.fs_bsize);
        freeblk(newblk, sblock.fs_frag);
        return (0);
}

/*
 * allocate a new directory
 */
ufs1_ino_t
allocdir(ufs1_ino_t parent, ufs1_ino_t request, int mode)
{
        ufs1_ino_t ino;
        char *cp;
        struct ufs1_dinode *dp;
        struct bufarea *bp;
        struct dirtemplate *dirp;

        ino = allocino(request, IFDIR|mode);
        if (newinofmt)
                dirp = &dirhead;
        else
                dirp = (struct dirtemplate *)&odirhead;
        dirp->dot_ino = ino;
        dirp->dotdot_ino = parent;
        dp = ginode(ino);
        bp = getdirblk(dp->di_db[0], sblock.fs_fsize);
        if (bp->b_errs) {
                freeino(ino);
                return (0);
        }
        memmove(bp->b_un.b_buf, dirp, sizeof(struct dirtemplate));
        for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
             cp < &bp->b_un.b_buf[sblock.fs_fsize];
             cp += DIRBLKSIZ)
                memmove(cp, &emptydir, sizeof emptydir);
        dirty(bp);
        dp->di_nlink = 2;
        inodirty();
        if (ino == UFS_ROOTINO) {
                inoinfo(ino)->ino_linkcnt = dp->di_nlink;
                cacheino(dp, ino);
                return(ino);
        }
        if (inoinfo(parent)->ino_state != DSTATE &&
            inoinfo(parent)->ino_state != DFOUND) {
                freeino(ino);
                return (0);
        }
        cacheino(dp, ino);
        inoinfo(ino)->ino_state = inoinfo(parent)->ino_state;
        if (inoinfo(ino)->ino_state == DSTATE) {
                inoinfo(ino)->ino_linkcnt = dp->di_nlink;
                inoinfo(parent)->ino_linkcnt++;
        }
        dp = ginode(parent);
        dp->di_nlink++;
        inodirty();
        return (ino);
}

/*
 * free a directory inode
 */
static void
freedir(ufs1_ino_t ino, ufs1_ino_t parent)
{
        struct ufs1_dinode *dp;

        if (ino != parent) {
                dp = ginode(parent);
                dp->di_nlink--;
                inodirty();
        }
        freeino(ino);
}

/*
 * generate a temporary name for the lost+found directory.
 */
static int
lftempname(char *bufp, ufs1_ino_t ino)
{
        ufs1_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(ufs_daddr_t blkno, long size)
{

        if (pdirbp != 0)
                pdirbp->b_flags &= ~B_INUSE;
        pdirbp = getdatablk(blkno, size);
        return (pdirbp);
}