711 lines
17 KiB
C
711 lines
17 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static const char sccsid[] = "@(#)dir.c 8.1 (Berkeley) 6/5/93";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ffs/fs.h>
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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 "fsck.h"
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char *lfname = "lost+found";
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int lfmode = 01777;
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struct dirtemplate emptydir = { 0, DIRBLKSIZ };
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struct dirtemplate dirhead = {
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0, 12, DT_DIR, 1, ".",
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0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
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};
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struct odirtemplate odirhead = {
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0, 12, 1, ".",
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0, DIRBLKSIZ - 12, 2, ".."
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};
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static int chgino __P((struct inodesc *idesc));
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static int dircheck __P((struct inodesc *idesc, struct direct *dp));
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static int expanddir __P((struct dinode *dp, char *name));
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static void freedir __P((ino_t ino, ino_t parent));
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static struct direct * fsck_readdir __P((struct inodesc *idesc));
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static struct bufarea * getdirblk __P((daddr_t blkno, long size));
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static int lftempname __P((char *bufp, ino_t ino));
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static int mkentry __P((struct inodesc *idesc));
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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()
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{
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register struct inoinfo **inpp, *inp;
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struct inoinfo **inpend;
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long change;
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inpend = &inpsort[inplast];
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do {
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change = 0;
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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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continue;
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if (statemap[inp->i_parent] == DFOUND &&
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statemap[inp->i_number] == DSTATE) {
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statemap[inp->i_number] = DFOUND;
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change++;
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}
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}
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} while (change > 0);
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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(idesc)
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register struct inodesc *idesc;
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{
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register struct direct *dp;
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register struct bufarea *bp;
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int dsize, n;
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long blksiz;
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char dbuf[DIRBLKSIZ];
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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 & (DIRBLKSIZ - 1)) != 0)
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idesc->id_filesize = roundup(idesc->id_filesize, DIRBLKSIZ);
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blksiz = idesc->id_numfrags * sblock.fs_fsize;
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if (chkrange(idesc->id_blkno, idesc->id_numfrags)) {
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idesc->id_filesize -= blksiz;
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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 = dp->d_reclen;
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bcopy((char *)dp, dbuf, (size_t)dsize);
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# if (BYTE_ORDER == LITTLE_ENDIAN)
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if (!newinofmt) {
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struct direct *tdp = (struct direct *)dbuf;
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u_char tmp;
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tmp = tdp->d_namlen;
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tdp->d_namlen = tdp->d_type;
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tdp->d_type = tmp;
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}
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# endif
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idesc->id_dirp = (struct direct *)dbuf;
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if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
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# if (BYTE_ORDER == LITTLE_ENDIAN)
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if (!newinofmt && !doinglevel2) {
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struct direct *tdp;
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u_char tmp;
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tdp = (struct direct *)dbuf;
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tmp = tdp->d_namlen;
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tdp->d_namlen = tdp->d_type;
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tdp->d_type = tmp;
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}
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# endif
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bp = getdirblk(idesc->id_blkno, blksiz);
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bcopy(dbuf, bp->b_un.b_buf + idesc->id_loc - dsize,
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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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return (n);
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}
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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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struct direct *
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fsck_readdir(idesc)
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register struct inodesc *idesc;
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{
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register struct direct *dp, *ndp;
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register struct bufarea *bp;
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long size, blksiz, fix, dploc;
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blksiz = idesc->id_numfrags * sblock.fs_fsize;
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bp = getdirblk(idesc->id_blkno, blksiz);
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if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 &&
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idesc->id_loc < blksiz) {
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dp = (struct 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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fix = dofix(idesc, "DIRECTORY CORRUPTED");
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bp = getdirblk(idesc->id_blkno, blksiz);
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dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc);
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dp->d_reclen = DIRBLKSIZ;
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dp->d_ino = 0;
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dp->d_type = 0;
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dp->d_namlen = 0;
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dp->d_name[0] = '\0';
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if (fix)
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dirty(bp);
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idesc->id_loc += DIRBLKSIZ;
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idesc->id_filesize -= DIRBLKSIZ;
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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 direct *)(bp->b_un.b_buf + dploc);
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idesc->id_loc += dp->d_reclen;
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idesc->id_filesize -= dp->d_reclen;
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if ((idesc->id_loc % DIRBLKSIZ) == 0)
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return (dp);
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ndp = (struct 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 = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
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idesc->id_loc += size;
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idesc->id_filesize -= size;
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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 direct *)(bp->b_un.b_buf + dploc);
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dp->d_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(idesc, dp)
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struct inodesc *idesc;
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register struct direct *dp;
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{
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register int size;
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register char *cp;
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u_char namlen, type;
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int spaceleft;
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size = DIRSIZ(!newinofmt, dp);
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spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
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# if (BYTE_ORDER == LITTLE_ENDIAN)
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if (!newinofmt) {
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type = dp->d_namlen;
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namlen = dp->d_type;
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} else {
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namlen = dp->d_namlen;
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type = dp->d_type;
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}
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# else
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namlen = dp->d_namlen;
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type = dp->d_type;
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# endif
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if (dp->d_ino < maxino &&
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dp->d_reclen != 0 &&
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dp->d_reclen <= spaceleft &&
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(dp->d_reclen & 0x3) == 0 &&
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dp->d_reclen >= size &&
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idesc->id_filesize >= size &&
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namlen <= MAXNAMLEN &&
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type <= 15) {
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if (dp->d_ino == 0)
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return (1);
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for (cp = dp->d_name, size = 0; size < namlen; size++)
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if (*cp == 0 || (*cp++ == '/'))
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return (0);
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if (*cp == 0)
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return (1);
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}
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return (0);
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}
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void
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direrror(ino, errmesg)
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ino_t ino;
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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(cwd, ino, errmesg)
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ino_t cwd, ino;
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char *errmesg;
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{
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register struct dinode *dp;
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char pathbuf[MAXPATHLEN + 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, cwd, ino);
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if (ino < 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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(dp->di_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(idesc, lcnt)
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register struct inodesc *idesc;
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short lcnt;
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{
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register struct dinode *dp;
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dp = ginode(idesc->id_number);
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if (dp->di_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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((dp->di_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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dp->di_nlink, dp->di_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->di_nlink -= lcnt;
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inodirty();
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}
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}
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}
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int
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mkentry(idesc)
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struct inodesc *idesc;
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{
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register struct direct *dirp = idesc->id_dirp;
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struct direct newent;
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int newlen, oldlen;
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newent.d_namlen = strlen(idesc->id_name);
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newlen = DIRSIZ(0, &newent);
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if (dirp->d_ino != 0)
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oldlen = DIRSIZ(0, dirp);
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else
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oldlen = 0;
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if (dirp->d_reclen - oldlen < newlen)
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return (KEEPON);
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newent.d_reclen = dirp->d_reclen - oldlen;
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dirp->d_reclen = oldlen;
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dirp = (struct direct *)(((char *)dirp) + oldlen);
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dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */
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if (newinofmt) {
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dirp->d_type = typemap[idesc->id_parent];
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dirp->d_namlen = newent.d_namlen;
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} else {
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# if (BYTE_ORDER == LITTLE_ENDIAN)
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dirp->d_type = newent.d_namlen;
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dirp->d_namlen = 0;
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# else
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dirp->d_type = 0;
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dirp->d_namlen = newent.d_namlen;
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# endif
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}
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dirp->d_reclen = newent.d_reclen;
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bcopy(idesc->id_name, dirp->d_name, (size_t)newent.d_namlen + 1);
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return (ALTERED|STOP);
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}
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int
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chgino(idesc)
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struct inodesc *idesc;
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{
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register struct direct *dirp = idesc->id_dirp;
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if (bcmp(dirp->d_name, idesc->id_name, (int)dirp->d_namlen + 1))
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return (KEEPON);
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dirp->d_ino = idesc->id_parent;
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if (newinofmt)
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dirp->d_type = typemap[idesc->id_parent];
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else
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dirp->d_type = 0;
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return (ALTERED|STOP);
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}
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int
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linkup(orphan, parentdir)
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ino_t orphan;
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ino_t parentdir;
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{
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register struct 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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bzero((char *)&idesc, sizeof(struct inodesc));
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dp = ginode(orphan);
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lostdir = (dp->di_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 && dp->di_size == 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(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 = 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(ROOTINO, (ino_t)0, lfmode);
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if (lfdir != 0) {
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if (makeentry(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, 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 ((dp->di_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(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(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)
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(void)makeentry(orphan, lfdir, "..");
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dp = ginode(lfdir);
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dp->di_nlink++;
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inodirty();
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lncntp[lfdir]++;
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pwarn("DIR I=%lu CONNECTED. ", orphan);
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if (parentdir != (ino_t)-1)
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printf("PARENT WAS I=%lu\n", parentdir);
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if (preen == 0)
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printf("\n");
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}
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return (1);
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}
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/*
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* fix an entry in a directory.
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*/
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int
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changeino(dir, name, newnum)
|
|
ino_t dir;
|
|
char *name;
|
|
ino_t newnum;
|
|
{
|
|
struct inodesc idesc;
|
|
|
|
bzero((char *)&idesc, 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(parent, ino, name)
|
|
ino_t parent, ino;
|
|
char *name;
|
|
{
|
|
struct dinode *dp;
|
|
struct inodesc idesc;
|
|
char pathbuf[MAXPATHLEN + 1];
|
|
|
|
if (parent < ROOTINO || parent >= maxino ||
|
|
ino < ROOTINO || ino >= maxino)
|
|
return (0);
|
|
bzero((char *)&idesc, 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
|
|
*/
|
|
int
|
|
expanddir(dp, name)
|
|
register struct dinode *dp;
|
|
char *name;
|
|
{
|
|
daddr_t lastbn, newblk;
|
|
register struct bufarea *bp;
|
|
char *cp, firstblk[DIRBLKSIZ];
|
|
|
|
lastbn = lblkno(&sblock, dp->di_size);
|
|
if (lastbn >= 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;
|
|
bcopy(bp->b_un.b_buf, firstblk, DIRBLKSIZ);
|
|
bp = getdirblk(newblk, sblock.fs_bsize);
|
|
if (bp->b_errs)
|
|
goto bad;
|
|
bcopy(firstblk, bp->b_un.b_buf, DIRBLKSIZ);
|
|
for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
|
|
cp < &bp->b_un.b_buf[sblock.fs_bsize];
|
|
cp += DIRBLKSIZ)
|
|
bcopy((char *)&emptydir, cp, sizeof emptydir);
|
|
dirty(bp);
|
|
bp = getdirblk(dp->di_db[lastbn + 1],
|
|
(long)dblksize(&sblock, dp, lastbn + 1));
|
|
if (bp->b_errs)
|
|
goto bad;
|
|
bcopy((char *)&emptydir, bp->b_un.b_buf, 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
|
|
*/
|
|
ino_t
|
|
allocdir(parent, request, mode)
|
|
ino_t parent, request;
|
|
int mode;
|
|
{
|
|
ino_t ino;
|
|
char *cp;
|
|
struct dinode *dp;
|
|
register 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);
|
|
}
|
|
bcopy((char *)dirp, bp->b_un.b_buf, sizeof(struct dirtemplate));
|
|
for (cp = &bp->b_un.b_buf[DIRBLKSIZ];
|
|
cp < &bp->b_un.b_buf[sblock.fs_fsize];
|
|
cp += DIRBLKSIZ)
|
|
bcopy((char *)&emptydir, cp, sizeof emptydir);
|
|
dirty(bp);
|
|
dp->di_nlink = 2;
|
|
inodirty();
|
|
if (ino == ROOTINO) {
|
|
lncntp[ino] = dp->di_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] = dp->di_nlink;
|
|
lncntp[parent]++;
|
|
}
|
|
dp = ginode(parent);
|
|
dp->di_nlink++;
|
|
inodirty();
|
|
return (ino);
|
|
}
|
|
|
|
/*
|
|
* free a directory inode
|
|
*/
|
|
static void
|
|
freedir(ino, parent)
|
|
ino_t ino, parent;
|
|
{
|
|
struct dinode *dp;
|
|
|
|
if (ino != parent) {
|
|
dp = ginode(parent);
|
|
dp->di_nlink--;
|
|
inodirty();
|
|
}
|
|
freeino(ino);
|
|
}
|
|
|
|
/*
|
|
* generate a temporary name for the lost+found directory.
|
|
*/
|
|
int
|
|
lftempname(bufp, ino)
|
|
char *bufp;
|
|
ino_t ino;
|
|
{
|
|
register ino_t in;
|
|
register 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.
|
|
*/
|
|
struct bufarea *
|
|
getdirblk(blkno, size)
|
|
daddr_t blkno;
|
|
long size;
|
|
{
|
|
|
|
if (pdirbp != 0)
|
|
pdirbp->b_flags &= ~B_INUSE;
|
|
pdirbp = getdatablk(blkno, size);
|
|
return (pdirbp);
|
|
}
|