685 lines
18 KiB
C
685 lines
18 KiB
C
/* $OpenBSD: dir.c,v 1.20 2015/01/16 06:39:57 deraadt Exp $ */
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/* $NetBSD: dir.c,v 1.5 2000/01/28 16:01:46 bouyer Exp $ */
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/*
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* Copyright (c) 1997 Manuel Bouyer.
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h> /* DEV_BSIZE roundup */
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#include <sys/time.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ext2fs/ext2fs_dinode.h>
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#include <ufs/ext2fs/ext2fs_dir.h>
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#include <ufs/ext2fs/ext2fs.h>
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#include <ufs/ufs/dinode.h> /* for IFMT & friends */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "fsck.h"
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#include "fsutil.h"
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#include "extern.h"
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char *lfname = "lost+found";
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int lfmode = 01777;
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struct ext2fs_dirtemplate emptydir = { 0, DIRBLKSIZ };
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struct ext2fs_dirtemplate dirhead = {
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0, 12, 1, EXT2_FT_DIR, ".",
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0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".."
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};
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#undef DIRBLKSIZ
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static int expanddir(struct ext2fs_dinode *, char *);
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static void freedir(ino_t, ino_t);
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static struct ext2fs_direct *fsck_readdir(struct inodesc *);
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static struct bufarea *getdirblk(daddr32_t, long);
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static int lftempname(char *, ino_t);
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static int mkentry(struct inodesc *);
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static int chgino(struct inodesc *);
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/*
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* Propagate connected state through the tree.
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*/
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void
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propagate(void)
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{
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struct inoinfo **inpp, *inp, *pinp;
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struct inoinfo **inpend;
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/*
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* Create a list of children for each directory.
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*/
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inpend = &inpsort[inplast];
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for (inpp = inpsort; inpp < inpend; inpp++) {
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inp = *inpp;
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if (inp->i_parent == 0 ||
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inp->i_number == EXT2_ROOTINO)
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continue;
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pinp = getinoinfo(inp->i_parent);
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inp->i_parentp = pinp;
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inp->i_sibling = pinp->i_child;
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pinp->i_child = inp;
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}
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inp = getinoinfo(EXT2_ROOTINO);
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while (inp) {
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statemap[inp->i_number] = DFOUND;
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if (inp->i_child &&
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statemap[inp->i_child->i_number] == DSTATE)
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inp = inp->i_child;
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else if (inp->i_sibling)
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inp = inp->i_sibling;
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else
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inp = inp->i_parentp;
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}
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}
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/*
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* Scan each entry in a directory block.
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*/
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int
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dirscan(struct inodesc *idesc)
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{
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struct ext2fs_direct *dp;
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struct bufarea *bp;
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int dsize, n;
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long blksiz;
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char *dbuf = NULL;
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if ((dbuf = malloc(sblock.e2fs_bsize)) == NULL) {
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fprintf(stderr, "out of memory");
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exit(8);
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}
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if (idesc->id_type != DATA)
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errexit("wrong type to dirscan %d\n", idesc->id_type);
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if (idesc->id_entryno == 0 &&
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(idesc->id_filesize & (sblock.e2fs_bsize - 1)) != 0)
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idesc->id_filesize = roundup(idesc->id_filesize, sblock.e2fs_bsize);
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blksiz = idesc->id_numfrags * sblock.e2fs_bsize;
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if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
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idesc->id_filesize -= blksiz;
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free(dbuf);
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return (SKIP);
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}
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idesc->id_loc = 0;
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for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
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dsize = letoh16(dp->e2d_reclen);
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memcpy(dbuf, dp, (size_t)dsize);
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idesc->id_dirp = (struct ext2fs_direct *)dbuf;
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if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
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bp = getdirblk(idesc->id_blkno, blksiz);
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memcpy(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf,
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(size_t)dsize);
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dirty(bp);
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sbdirty();
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}
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if (n & STOP) {
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free(dbuf);
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return (n);
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}
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}
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free(dbuf);
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return (idesc->id_filesize > 0 ? KEEPON : STOP);
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}
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/*
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* get next entry in a directory.
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*/
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static struct ext2fs_direct *
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fsck_readdir(struct inodesc *idesc)
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{
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struct ext2fs_direct *dp, *ndp;
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struct bufarea *bp;
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long size, blksiz, fix, dploc;
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blksiz = idesc->id_numfrags * sblock.e2fs_bsize;
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bp = getdirblk(idesc->id_blkno, blksiz);
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if (idesc->id_loc % sblock.e2fs_bsize == 0 && idesc->id_filesize > 0 &&
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idesc->id_loc < blksiz) {
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dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
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if (dircheck(idesc, dp))
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goto dpok;
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if (idesc->id_fix == IGNORE)
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return (0);
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fix = dofix(idesc, "DIRECTORY CORRUPTED");
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bp = getdirblk(idesc->id_blkno, blksiz);
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dp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
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dp->e2d_reclen = htole16(sblock.e2fs_bsize);
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dp->e2d_ino = 0;
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dp->e2d_namlen = 0;
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dp->e2d_type = 0;
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dp->e2d_name[0] = '\0';
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if (fix)
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dirty(bp);
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idesc->id_loc += sblock.e2fs_bsize;
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idesc->id_filesize -= sblock.e2fs_bsize;
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return (dp);
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}
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dpok:
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if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
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return NULL;
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dploc = idesc->id_loc;
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dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc);
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idesc->id_loc += letoh16(dp->e2d_reclen);
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idesc->id_filesize -= letoh16(dp->e2d_reclen);
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if ((idesc->id_loc % sblock.e2fs_bsize) == 0)
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return (dp);
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ndp = (struct ext2fs_direct *)(bp->b_un.b_buf + idesc->id_loc);
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if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
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dircheck(idesc, ndp) == 0) {
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size = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize);
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idesc->id_loc += size;
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idesc->id_filesize -= size;
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if (idesc->id_fix == IGNORE)
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return (0);
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fix = dofix(idesc, "DIRECTORY CORRUPTED");
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bp = getdirblk(idesc->id_blkno, blksiz);
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dp = (struct ext2fs_direct *)(bp->b_un.b_buf + dploc);
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dp->e2d_reclen = htole16(letoh16(dp->e2d_reclen) + size);
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if (fix)
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dirty(bp);
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}
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return (dp);
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}
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/*
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* Verify that a directory entry is valid.
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* This is a superset of the checks made in the kernel.
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*/
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int
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dircheck(struct inodesc *idesc, struct ext2fs_direct *dp)
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{
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int size;
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char *cp;
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int spaceleft;
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u_int16_t reclen = letoh16(dp->e2d_reclen);
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spaceleft = sblock.e2fs_bsize - (idesc->id_loc % sblock.e2fs_bsize);
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if (letoh32(dp->e2d_ino) > maxino ||
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reclen == 0 ||
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reclen > spaceleft ||
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(reclen & 0x3) != 0)
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return (0);
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if (dp->e2d_ino == 0)
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return (1);
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if (sblock.e2fs.e2fs_rev < E2FS_REV1 ||
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(sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE) == 0)
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if (dp->e2d_type != 0)
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return (1);
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size = EXT2FS_DIRSIZ(dp->e2d_namlen);
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if (reclen < size ||
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idesc->id_filesize < size ||
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dp->e2d_namlen > EXT2FS_MAXNAMLEN)
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return (0);
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for (cp = dp->e2d_name, size = 0; size < dp->e2d_namlen; size++)
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if (*cp == '\0' || (*cp++ == '/'))
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return (0);
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return (1);
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}
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void
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direrror(ino_t ino, char *errmesg)
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{
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fileerror(ino, ino, errmesg);
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}
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void
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fileerror(ino_t cwd, ino_t ino, char *errmesg)
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{
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struct ext2fs_dinode *dp;
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char pathbuf[PATH_MAX + 1];
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pwarn("%s ", errmesg);
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pinode(ino);
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printf("\n");
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getpathname(pathbuf, sizeof pathbuf, cwd, ino);
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if ((ino < EXT2_FIRSTINO && ino != EXT2_ROOTINO) || ino > maxino) {
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pfatal("NAME=%s\n", pathbuf);
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return;
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}
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dp = ginode(ino);
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if (ftypeok(dp))
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pfatal("%s=%s\n",
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(letoh16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf);
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else
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pfatal("NAME=%s\n", pathbuf);
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}
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void
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adjust(struct inodesc *idesc, short lcnt)
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{
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struct ext2fs_dinode *dp;
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dp = ginode(idesc->id_number);
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if (letoh16(dp->e2di_nlink) == lcnt) {
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if (linkup(idesc->id_number, (ino_t)0) == 0)
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clri(idesc, "UNREF", 0);
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} else {
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pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname :
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((letoh16(dp->e2di_mode) & IFMT) == IFDIR ? "DIR" : "FILE"));
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pinode(idesc->id_number);
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printf(" COUNT %d SHOULD BE %d",
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letoh16(dp->e2di_nlink), letoh16(dp->e2di_nlink) - lcnt);
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if (preen) {
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if (lcnt < 0) {
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printf("\n");
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pfatal("LINK COUNT INCREASING");
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}
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printf(" (ADJUSTED)\n");
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}
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if (preen || reply("ADJUST") == 1) {
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dp->e2di_nlink = htole16(letoh16(dp->e2di_nlink) - lcnt);
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inodirty();
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}
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}
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}
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static int
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mkentry(struct inodesc *idesc)
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{
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struct ext2fs_direct *dirp = idesc->id_dirp;
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struct ext2fs_direct newent;
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int newlen, oldlen;
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newent.e2d_type = EXT2_FT_UNKNOWN;
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newent.e2d_namlen = strlen(idesc->id_name);
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if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
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(sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
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newent.e2d_type = inot2ext2dt(typemap[idesc->id_parent]);
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newlen = EXT2FS_DIRSIZ(newent.e2d_namlen);
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if (dirp->e2d_ino != 0)
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oldlen = EXT2FS_DIRSIZ(dirp->e2d_namlen);
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else
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oldlen = 0;
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if (letoh16(dirp->e2d_reclen) - oldlen < newlen)
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return (KEEPON);
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newent.e2d_reclen = htole16(letoh16(dirp->e2d_reclen) - oldlen);
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dirp->e2d_reclen = htole16(oldlen);
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dirp = (struct ext2fs_direct *)(((char *)dirp) + oldlen);
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dirp->e2d_ino = htole32(idesc->id_parent); /* ino to be entered is in id_parent */
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dirp->e2d_reclen = newent.e2d_reclen;
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dirp->e2d_namlen = newent.e2d_namlen;
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dirp->e2d_type = newent.e2d_type;
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memcpy(dirp->e2d_name, idesc->id_name, (size_t)(dirp->e2d_namlen));
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return (ALTERED|STOP);
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}
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static int
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chgino(struct inodesc *idesc)
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{
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struct ext2fs_direct *dirp = idesc->id_dirp;
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u_int16_t namlen = dirp->e2d_namlen;
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if (strlen(idesc->id_name) != namlen ||
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strncmp(dirp->e2d_name, idesc->id_name, (int)namlen))
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return (KEEPON);
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dirp->e2d_ino = htole32(idesc->id_parent);
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if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
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(sblock.e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE))
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dirp->e2d_type = inot2ext2dt(typemap[idesc->id_parent]);
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else
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dirp->e2d_type = 0;
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return (ALTERED|STOP);
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}
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int
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linkup(ino_t orphan, ino_t parentdir)
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{
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struct ext2fs_dinode *dp;
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int lostdir;
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ino_t oldlfdir;
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struct inodesc idesc;
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char tempname[BUFSIZ];
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memset(&idesc, 0, sizeof(struct inodesc));
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dp = ginode(orphan);
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lostdir = (letoh16(dp->e2di_mode) & IFMT) == IFDIR;
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pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
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pinode(orphan);
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if (preen && inosize(dp) == 0)
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return (0);
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if (preen)
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printf(" (RECONNECTED)\n");
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else
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if (reply("RECONNECT") == 0)
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return (0);
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if (lfdir == 0) {
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dp = ginode(EXT2_ROOTINO);
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idesc.id_name = lfname;
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idesc.id_type = DATA;
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idesc.id_func = findino;
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idesc.id_number = EXT2_ROOTINO;
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if ((ckinode(dp, &idesc) & FOUND) != 0) {
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lfdir = idesc.id_parent;
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} else {
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pwarn("NO lost+found DIRECTORY");
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if (preen || reply("CREATE")) {
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lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode);
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if (lfdir != 0) {
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if (makeentry(EXT2_ROOTINO, lfdir, lfname) != 0) {
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if (preen)
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printf(" (CREATED)\n");
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} else {
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freedir(lfdir, EXT2_ROOTINO);
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lfdir = 0;
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if (preen)
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printf("\n");
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}
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}
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}
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}
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if (lfdir == 0) {
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pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY");
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printf("\n\n");
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return (0);
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}
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}
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dp = ginode(lfdir);
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if ((letoh16(dp->e2di_mode) & IFMT) != IFDIR) {
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pfatal("lost+found IS NOT A DIRECTORY");
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if (reply("REALLOCATE") == 0)
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return (0);
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oldlfdir = lfdir;
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if ((lfdir = allocdir(EXT2_ROOTINO, (ino_t)0, lfmode)) == 0) {
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pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
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return (0);
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}
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if ((changeino(EXT2_ROOTINO, lfname, lfdir) & ALTERED) == 0) {
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pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n");
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return (0);
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}
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inodirty();
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idesc.id_type = ADDR;
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idesc.id_func = pass4check;
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idesc.id_number = oldlfdir;
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adjust(&idesc, lncntp[oldlfdir] + 1);
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lncntp[oldlfdir] = 0;
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dp = ginode(lfdir);
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}
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if (statemap[lfdir] != DFOUND) {
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pfatal("SORRY. NO lost+found DIRECTORY\n\n");
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return (0);
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}
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(void)lftempname(tempname, orphan);
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if (makeentry(lfdir, orphan, tempname) == 0) {
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pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
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printf("\n\n");
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return (0);
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}
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lncntp[orphan]--;
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if (lostdir) {
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if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 &&
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parentdir != (ino_t)-1)
|
|
(void)makeentry(orphan, lfdir, "..");
|
|
dp = ginode(lfdir);
|
|
dp->e2di_nlink = htole16(letoh16(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, 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, char *name)
|
|
{
|
|
struct ext2fs_dinode *dp;
|
|
struct inodesc idesc;
|
|
char pathbuf[PATH_MAX + 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)
|
|
{
|
|
daddr32_t lastbn, newblk;
|
|
struct bufarea *bp;
|
|
char *firstblk;
|
|
|
|
lastbn = lblkno(&sblock, inosize(dp));
|
|
if (lastbn >= NDADDR - 1 || letoh32(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] = htole32(newblk);
|
|
inossize(dp, inosize(dp) + sblock.e2fs_bsize);
|
|
dp->e2di_nblock = htole32(letoh32(dp->e2di_nblock) + 1);
|
|
bp = getdirblk(letoh32(dp->e2di_blocks[lastbn + 1]),
|
|
sblock.e2fs_bsize);
|
|
if (bp->b_errs)
|
|
goto bad;
|
|
if ((firstblk = malloc(sblock.e2fs_bsize)) == NULL) {
|
|
fprintf(stderr, "out of memory\n");
|
|
exit(8);
|
|
}
|
|
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(letoh32(dp->e2di_blocks[lastbn + 1]),
|
|
sblock.e2fs_bsize);
|
|
if (bp->b_errs)
|
|
goto bad;
|
|
emptydir.dot_reclen = htole16(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;
|
|
dp->e2di_size = htole32(letoh32(dp->e2di_size) - sblock.e2fs_bsize);
|
|
inossize(dp, inosize(dp) - sblock.e2fs_bsize);
|
|
dp->e2di_nblock = htole32(letoh32(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 = htole16(12); /* XXX */
|
|
dirhead.dotdot_reclen = htole16(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 = htole32(ino);
|
|
dirp->dotdot_ino = htole32(parent);
|
|
dp = ginode(ino);
|
|
bp = getdirblk(letoh32(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 = htole16(2);
|
|
inodirty();
|
|
if (ino == EXT2_ROOTINO) {
|
|
lncntp[ino] = letoh16(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] = letoh16(dp->e2di_nlink);
|
|
lncntp[parent]++;
|
|
}
|
|
dp = ginode(parent);
|
|
dp->e2di_nlink = htole16(letoh16(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 = htole16(letoh16(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(daddr32_t blkno, long size)
|
|
{
|
|
|
|
if (pdirbp != 0)
|
|
pdirbp->b_flags &= ~B_INUSE;
|
|
pdirbp = getdatablk(blkno, size);
|
|
return (pdirbp);
|
|
}
|