638 lines
15 KiB
C
638 lines
15 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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#if 0
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static const char sccsid[] = "@(#)inode.c 8.8 (Berkeley) 4/28/95";
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#endif
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static const char rcsid[] =
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"$Id: inode.c,v 1.15 1998/06/28 19:23:02 bde Exp $";
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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 <err.h>
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#include <pwd.h>
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#include <string.h>
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#include "fsck.h"
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static ino_t startinum;
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static int iblock __P((struct inodesc *, long ilevel, quad_t isize));
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int
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ckinode(dp, idesc)
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struct dinode *dp;
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register struct inodesc *idesc;
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{
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ufs_daddr_t *ap;
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long ret, n, ndb, offset;
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struct dinode dino;
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quad_t remsize, sizepb;
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mode_t mode;
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char pathbuf[MAXPATHLEN + 1];
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if (idesc->id_fix != IGNORE)
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idesc->id_fix = DONTKNOW;
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idesc->id_entryno = 0;
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idesc->id_filesize = dp->di_size;
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mode = dp->di_mode & IFMT;
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if (mode == IFBLK || mode == IFCHR || (mode == IFLNK &&
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(dp->di_size < sblock.fs_maxsymlinklen || dp->di_blocks == 0)))
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return (KEEPON);
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dino = *dp;
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ndb = howmany(dino.di_size, sblock.fs_bsize);
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for (ap = &dino.di_db[0]; ap < &dino.di_db[NDADDR]; ap++) {
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if (--ndb == 0 && (offset = blkoff(&sblock, dino.di_size)) != 0)
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idesc->id_numfrags =
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numfrags(&sblock, fragroundup(&sblock, offset));
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else
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idesc->id_numfrags = sblock.fs_frag;
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if (*ap == 0) {
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if (idesc->id_type == DATA && ndb >= 0) {
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/* An empty block in a directory XXX */
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getpathname(pathbuf, idesc->id_number,
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idesc->id_number);
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pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
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pathbuf);
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if (reply("ADJUST LENGTH") == 1) {
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dp = ginode(idesc->id_number);
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dp->di_size = (ap - &dino.di_db[0]) *
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sblock.fs_bsize;
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printf(
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"YOU MUST RERUN FSCK AFTERWARDS\n");
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rerun = 1;
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inodirty();
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}
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}
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continue;
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}
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idesc->id_blkno = *ap;
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if (idesc->id_type == ADDR)
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ret = (*idesc->id_func)(idesc);
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else
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ret = dirscan(idesc);
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if (ret & STOP)
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return (ret);
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}
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idesc->id_numfrags = sblock.fs_frag;
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remsize = dino.di_size - sblock.fs_bsize * NDADDR;
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sizepb = sblock.fs_bsize;
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for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
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if (*ap) {
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idesc->id_blkno = *ap;
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ret = iblock(idesc, n, remsize);
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if (ret & STOP)
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return (ret);
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} else {
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if (idesc->id_type == DATA && remsize > 0) {
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/* An empty block in a directory XXX */
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getpathname(pathbuf, idesc->id_number,
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idesc->id_number);
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pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
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pathbuf);
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if (reply("ADJUST LENGTH") == 1) {
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dp = ginode(idesc->id_number);
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dp->di_size -= remsize;
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remsize = 0;
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printf(
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"YOU MUST RERUN FSCK AFTERWARDS\n");
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rerun = 1;
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inodirty();
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break;
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}
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}
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}
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sizepb *= NINDIR(&sblock);
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remsize -= sizepb;
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}
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return (KEEPON);
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}
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static int
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iblock(idesc, ilevel, isize)
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struct inodesc *idesc;
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long ilevel;
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quad_t isize;
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{
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ufs_daddr_t *ap;
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ufs_daddr_t *aplim;
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struct bufarea *bp;
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int i, n, (*func)(), nif;
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quad_t sizepb;
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char buf[BUFSIZ];
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char pathbuf[MAXPATHLEN + 1];
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struct dinode *dp;
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if (idesc->id_type == ADDR) {
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func = idesc->id_func;
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if (((n = (*func)(idesc)) & KEEPON) == 0)
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return (n);
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} else
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func = dirscan;
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if (chkrange(idesc->id_blkno, idesc->id_numfrags))
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return (SKIP);
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bp = getdatablk(idesc->id_blkno, sblock.fs_bsize);
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ilevel--;
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for (sizepb = sblock.fs_bsize, i = 0; i < ilevel; i++)
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sizepb *= NINDIR(&sblock);
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nif = howmany(isize , sizepb);
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if (nif > NINDIR(&sblock))
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nif = NINDIR(&sblock);
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if (idesc->id_func == pass1check && nif < NINDIR(&sblock)) {
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aplim = &bp->b_un.b_indir[NINDIR(&sblock)];
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for (ap = &bp->b_un.b_indir[nif]; ap < aplim; ap++) {
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if (*ap == 0)
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continue;
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(void)sprintf(buf, "PARTIALLY TRUNCATED INODE I=%lu",
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(u_long)idesc->id_number);
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if (dofix(idesc, buf)) {
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*ap = 0;
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dirty(bp);
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}
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}
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flush(fswritefd, bp);
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}
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aplim = &bp->b_un.b_indir[nif];
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for (ap = bp->b_un.b_indir; ap < aplim; ap++) {
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if (*ap) {
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idesc->id_blkno = *ap;
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if (ilevel == 0)
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n = (*func)(idesc);
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else
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n = iblock(idesc, ilevel, isize);
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if (n & STOP) {
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bp->b_flags &= ~B_INUSE;
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return (n);
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}
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} else {
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if (idesc->id_type == DATA && isize > 0) {
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/* An empty block in a directory XXX */
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getpathname(pathbuf, idesc->id_number,
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idesc->id_number);
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pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
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pathbuf);
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if (reply("ADJUST LENGTH") == 1) {
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dp = ginode(idesc->id_number);
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dp->di_size -= isize;
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isize = 0;
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printf(
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"YOU MUST RERUN FSCK AFTERWARDS\n");
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rerun = 1;
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inodirty();
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bp->b_flags &= ~B_INUSE;
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return(STOP);
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}
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}
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}
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isize -= sizepb;
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}
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bp->b_flags &= ~B_INUSE;
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return (KEEPON);
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}
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/*
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* Check that a block in a legal block number.
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* Return 0 if in range, 1 if out of range.
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*/
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int
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chkrange(blk, cnt)
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ufs_daddr_t blk;
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int cnt;
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{
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register int c;
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if (blk < 0 || blk >= maxfsblock || cnt < 0 || cnt > maxfsblock - blk)
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return (1);
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c = dtog(&sblock, blk);
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if (blk < cgdmin(&sblock, c)) {
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if ((blk + cnt) > cgsblock(&sblock, c)) {
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if (debug) {
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printf("blk %ld < cgdmin %ld;",
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(long)blk, (long)cgdmin(&sblock, c));
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printf(" blk + cnt %ld > cgsbase %ld\n",
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(long)(blk + cnt),
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(long)cgsblock(&sblock, c));
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}
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return (1);
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}
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} else {
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if ((blk + cnt) > cgbase(&sblock, c+1)) {
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if (debug) {
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printf("blk %ld >= cgdmin %ld;",
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(long)blk, (long)cgdmin(&sblock, c));
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printf(" blk + cnt %ld > sblock.fs_fpg %ld\n",
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(long)(blk + cnt), (long)sblock.fs_fpg);
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}
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return (1);
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}
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}
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return (0);
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}
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/*
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* General purpose interface for reading inodes.
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*/
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struct dinode *
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ginode(inumber)
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ino_t inumber;
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{
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ufs_daddr_t iblk;
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if (inumber < ROOTINO || inumber > maxino)
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errx(EEXIT, "bad inode number %d to ginode", inumber);
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if (startinum == 0 ||
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inumber < startinum || inumber >= startinum + INOPB(&sblock)) {
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iblk = ino_to_fsba(&sblock, inumber);
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if (pbp != 0)
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pbp->b_flags &= ~B_INUSE;
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pbp = getdatablk(iblk, sblock.fs_bsize);
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startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
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}
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return (&pbp->b_un.b_dinode[inumber % INOPB(&sblock)]);
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}
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/*
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* Special purpose version of ginode used to optimize first pass
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* over all the inodes in numerical order.
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*/
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ino_t nextino, lastinum;
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long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
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struct dinode *inodebuf;
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struct dinode *
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getnextinode(inumber)
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ino_t inumber;
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{
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long size;
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ufs_daddr_t dblk;
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static struct dinode *dp;
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if (inumber != nextino++ || inumber > maxino)
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errx(EEXIT, "bad inode number %d to nextinode", inumber);
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if (inumber >= lastinum) {
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readcnt++;
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dblk = fsbtodb(&sblock, ino_to_fsba(&sblock, lastinum));
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if (readcnt % readpercg == 0) {
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size = partialsize;
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lastinum += partialcnt;
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} else {
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size = inobufsize;
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lastinum += fullcnt;
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}
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(void)bread(fsreadfd, (char *)inodebuf, dblk, size); /* ??? */
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dp = inodebuf;
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}
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return (dp++);
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}
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void
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resetinodebuf()
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{
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startinum = 0;
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nextino = 0;
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lastinum = 0;
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readcnt = 0;
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inobufsize = blkroundup(&sblock, INOBUFSIZE);
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fullcnt = inobufsize / sizeof(struct dinode);
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readpercg = sblock.fs_ipg / fullcnt;
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partialcnt = sblock.fs_ipg % fullcnt;
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partialsize = partialcnt * sizeof(struct dinode);
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if (partialcnt != 0) {
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readpercg++;
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} else {
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partialcnt = fullcnt;
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partialsize = inobufsize;
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}
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if (inodebuf == NULL &&
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(inodebuf = (struct dinode *)malloc((unsigned)inobufsize)) == NULL)
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errx(EEXIT, "cannot allocate space for inode buffer");
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while (nextino < ROOTINO)
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(void)getnextinode(nextino);
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}
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void
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freeinodebuf()
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{
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if (inodebuf != NULL)
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free((char *)inodebuf);
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inodebuf = NULL;
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}
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/*
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* Routines to maintain information about directory inodes.
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* This is built during the first pass and used during the
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* second and third passes.
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*
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* Enter inodes into the cache.
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*/
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void
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cacheino(dp, inumber)
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register struct dinode *dp;
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ino_t inumber;
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{
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register struct inoinfo *inp;
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struct inoinfo **inpp;
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int blks;
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blks = howmany(dp->di_size, sblock.fs_bsize);
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if (blks > NDADDR)
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blks = NDADDR + NIADDR;
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inp = (struct inoinfo *)
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malloc(sizeof(*inp) + (blks - 1) * sizeof(ufs_daddr_t));
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if (inp == NULL)
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return;
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inpp = &inphead[inumber % numdirs];
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inp->i_nexthash = *inpp;
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*inpp = inp;
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if (inumber == ROOTINO)
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inp->i_parent = ROOTINO;
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else
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inp->i_parent = (ino_t)0;
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inp->i_dotdot = (ino_t)0;
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inp->i_number = inumber;
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inp->i_isize = dp->di_size;
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inp->i_numblks = blks * sizeof(ufs_daddr_t);
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memmove(&inp->i_blks[0], &dp->di_db[0], (size_t)inp->i_numblks);
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if (inplast == listmax) {
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listmax += 100;
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inpsort = (struct inoinfo **)realloc((char *)inpsort,
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(unsigned)listmax * sizeof(struct inoinfo *));
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if (inpsort == NULL)
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errx(EEXIT, "cannot increase directory list");
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}
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inpsort[inplast++] = inp;
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}
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/*
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* Look up an inode cache structure.
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*/
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struct inoinfo *
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getinoinfo(inumber)
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ino_t inumber;
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{
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register struct inoinfo *inp;
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for (inp = inphead[inumber % numdirs]; inp; inp = inp->i_nexthash) {
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if (inp->i_number != inumber)
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continue;
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return (inp);
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}
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errx(EEXIT, "cannot find inode %d", inumber);
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return ((struct inoinfo *)0);
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}
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/*
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* Clean up all the inode cache structure.
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*/
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void
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inocleanup()
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{
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register struct inoinfo **inpp;
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if (inphead == NULL)
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return;
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for (inpp = &inpsort[inplast - 1]; inpp >= inpsort; inpp--)
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free((char *)(*inpp));
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free((char *)inphead);
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free((char *)inpsort);
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inphead = inpsort = NULL;
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}
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void
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inodirty()
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{
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dirty(pbp);
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}
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void
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clri(idesc, type, flag)
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register struct inodesc *idesc;
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char *type;
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int flag;
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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 (flag == 1) {
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pwarn("%s %s", type,
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(dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE");
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pinode(idesc->id_number);
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}
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if (preen || reply("CLEAR") == 1) {
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if (preen)
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printf(" (CLEARED)\n");
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n_files--;
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(void)ckinode(dp, idesc);
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clearinode(dp);
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statemap[idesc->id_number] = USTATE;
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inodirty();
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}
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}
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int
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findname(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 (dirp->d_ino != idesc->id_parent)
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return (KEEPON);
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memmove(idesc->id_name, dirp->d_name, (size_t)dirp->d_namlen + 1);
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return (STOP|FOUND);
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}
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int
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findino(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 (dirp->d_ino == 0)
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return (KEEPON);
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if (strcmp(dirp->d_name, idesc->id_name) == 0 &&
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dirp->d_ino >= ROOTINO && dirp->d_ino <= maxino) {
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idesc->id_parent = dirp->d_ino;
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return (STOP|FOUND);
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}
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return (KEEPON);
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}
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void
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pinode(ino)
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ino_t ino;
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{
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register struct dinode *dp;
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register char *p;
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struct passwd *pw;
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time_t t;
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|
|
printf(" I=%lu ", (u_long)ino);
|
|
if (ino < ROOTINO || ino > maxino)
|
|
return;
|
|
dp = ginode(ino);
|
|
printf(" OWNER=");
|
|
if ((pw = getpwuid((int)dp->di_uid)) != 0)
|
|
printf("%s ", pw->pw_name);
|
|
else
|
|
printf("%u ", (unsigned)dp->di_uid);
|
|
printf("MODE=%o\n", dp->di_mode);
|
|
if (preen)
|
|
printf("%s: ", cdevname);
|
|
printf("SIZE=%qu ", dp->di_size);
|
|
t = dp->di_mtime;
|
|
p = ctime(&t);
|
|
printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]);
|
|
}
|
|
|
|
void
|
|
blkerror(ino, type, blk)
|
|
ino_t ino;
|
|
char *type;
|
|
ufs_daddr_t blk;
|
|
{
|
|
|
|
pfatal("%ld %s I=%lu", blk, type, ino);
|
|
printf("\n");
|
|
switch (statemap[ino]) {
|
|
|
|
case FSTATE:
|
|
statemap[ino] = FCLEAR;
|
|
return;
|
|
|
|
case DSTATE:
|
|
statemap[ino] = DCLEAR;
|
|
return;
|
|
|
|
case FCLEAR:
|
|
case DCLEAR:
|
|
return;
|
|
|
|
default:
|
|
errx(EEXIT, "BAD STATE %d TO BLKERR", statemap[ino]);
|
|
/* NOTREACHED */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* allocate an unused inode
|
|
*/
|
|
ino_t
|
|
allocino(request, type)
|
|
ino_t request;
|
|
int type;
|
|
{
|
|
register ino_t ino;
|
|
register struct dinode *dp;
|
|
struct cg *cgp = &cgrp;
|
|
int cg;
|
|
|
|
if (request == 0)
|
|
request = ROOTINO;
|
|
else if (statemap[request] != USTATE)
|
|
return (0);
|
|
for (ino = request; ino < maxino; ino++)
|
|
if (statemap[ino] == USTATE)
|
|
break;
|
|
if (ino == maxino)
|
|
return (0);
|
|
cg = ino_to_cg(&sblock, ino);
|
|
getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
|
|
if (!cg_chkmagic(cgp))
|
|
pfatal("CG %d: BAD MAGIC NUMBER\n", cg);
|
|
setbit(cg_inosused(cgp), ino % sblock.fs_ipg);
|
|
cgp->cg_cs.cs_nifree--;
|
|
switch (type & IFMT) {
|
|
case IFDIR:
|
|
statemap[ino] = DSTATE;
|
|
cgp->cg_cs.cs_ndir++;
|
|
break;
|
|
case IFREG:
|
|
case IFLNK:
|
|
statemap[ino] = FSTATE;
|
|
break;
|
|
default:
|
|
return (0);
|
|
}
|
|
cgdirty();
|
|
dp = ginode(ino);
|
|
dp->di_db[0] = allocblk((long)1);
|
|
if (dp->di_db[0] == 0) {
|
|
statemap[ino] = USTATE;
|
|
return (0);
|
|
}
|
|
dp->di_flags = 0;
|
|
dp->di_mode = type;
|
|
dp->di_atime = time(NULL);
|
|
dp->di_mtime = dp->di_ctime = dp->di_atime;
|
|
dp->di_size = sblock.fs_fsize;
|
|
dp->di_blocks = btodb(sblock.fs_fsize);
|
|
n_files++;
|
|
inodirty();
|
|
if (newinofmt)
|
|
typemap[ino] = IFTODT(type);
|
|
return (ino);
|
|
}
|
|
|
|
/*
|
|
* deallocate an inode
|
|
*/
|
|
void
|
|
freeino(ino)
|
|
ino_t ino;
|
|
{
|
|
struct inodesc idesc;
|
|
struct dinode *dp;
|
|
|
|
memset(&idesc, 0, sizeof(struct inodesc));
|
|
idesc.id_type = ADDR;
|
|
idesc.id_func = pass4check;
|
|
idesc.id_number = ino;
|
|
dp = ginode(ino);
|
|
(void)ckinode(dp, &idesc);
|
|
clearinode(dp);
|
|
inodirty();
|
|
statemap[ino] = USTATE;
|
|
n_files--;
|
|
}
|