309 lines
9.0 KiB
C
309 lines
9.0 KiB
C
/* $NetBSD: pass0.c,v 1.20 2005/04/11 23:19:24 perseant Exp $ */
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/*-
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* Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Konrad E. Schroder <perseant@hhhh.org>.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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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/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/buf.h>
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#include <sys/mount.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ufs/dir.h>
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#define vnode uvnode
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#include <ufs/lfs/lfs.h>
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#undef vnode
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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 "bufcache.h"
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#include "vnode.h"
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#include "lfs.h"
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#include "fsck.h"
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#include "extern.h"
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#include "fsutil.h"
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extern int fake_cleanseg;
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int extend_ifile(void);
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/*
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* Pass 0. Check the LFS partial segments for valid checksums, correcting
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* if necessary. Also check for valid offsets for inode and finfo blocks.
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*/
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/*
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* XXX more could be done here---consistency between inode-held blocks and
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* finfo blocks, for one thing.
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*/
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#define dbshift (fs->lfs_bshift - fs->lfs_blktodb)
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void
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pass0(void)
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{
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daddr_t daddr;
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CLEANERINFO *cip;
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IFILE *ifp;
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struct ubuf *bp;
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ino_t ino, plastino, nextino, *visited, lowfreeino;
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int writeit = 0;
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int count;
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long long totaldist;
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/*
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* Check the inode free list for inuse inodes, and cycles.
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* Make sure that all free inodes are in fact on the list.
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*/
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visited = (ino_t *) malloc(maxino * sizeof(ino_t));
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memset(visited, 0, maxino * sizeof(ino_t));
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#ifdef BAD
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/*
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* Scramble the free list, to trigger the optimizer below.
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* You don't want this unless you are debugging fsck_lfs itself.
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*/
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if (!preen && reply("SCRAMBLE FREE LIST") == 1) {
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ino_t topino, botino, tail;
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botino = 0;
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topino = maxino;
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while (botino < topino) {
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for (--topino; botino < topino; --topino) {
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LFS_IENTRY(ifp, fs, topino, bp);
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if (ifp->if_daddr == 0)
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break;
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brelse(bp);
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bp = NULL;
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}
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if (topino == botino)
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break;
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if (botino > 0) {
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ifp->if_nextfree = botino;
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} else {
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ifp->if_nextfree = 0x0;
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tail = topino;
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}
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VOP_BWRITE(bp);
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ino = topino;
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for (++botino; botino < topino; ++botino) {
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LFS_IENTRY(ifp, fs, botino, bp);
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if (ifp->if_daddr == 0)
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break;
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brelse(bp);
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bp = NULL;
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}
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if (topino == botino)
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break;
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ifp->if_nextfree = topino;
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VOP_BWRITE(bp);
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ino = botino;
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}
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LFS_CLEANERINFO(cip, fs, bp);
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cip->free_head = fs->lfs_freehd = ino;
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cip->free_tail = tail;
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LFS_SYNC_CLEANERINFO(cip, fs, bp, 1);
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}
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#endif /* BAD */
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count = 0;
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plastino = 0;
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totaldist = 0;
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lowfreeino = maxino;
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ino = fs->lfs_freehd;
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while (ino) {
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if (lowfreeino > ino)
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lowfreeino = ino;
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if (plastino > 0) {
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totaldist += abs(ino - plastino);
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++count;
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}
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if (ino >= maxino) {
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printf("! Ino %d out of range (last was %d)\n", ino,
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plastino);
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break;
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}
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if (visited[ino]) {
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pwarn("! Ino %d already found on the free list!\n",
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ino);
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if (preen || reply("FIX") == 1) {
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/* plastino can't be zero */
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LFS_IENTRY(ifp, fs, plastino, bp);
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ifp->if_nextfree = 0;
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VOP_BWRITE(bp);
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}
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break;
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}
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++visited[ino];
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LFS_IENTRY(ifp, fs, ino, bp);
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nextino = ifp->if_nextfree;
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daddr = ifp->if_daddr;
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brelse(bp);
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if (daddr) {
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pwarn("! Ino %d with daddr 0x%llx is on the free list!\n",
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ino, (long long) daddr);
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if (preen || reply("FIX") == 1) {
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if (plastino == 0) {
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fs->lfs_freehd = nextino;
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sbdirty();
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} else {
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LFS_IENTRY(ifp, fs, plastino, bp);
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ifp->if_nextfree = nextino;
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VOP_BWRITE(bp);
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}
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ino = nextino;
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continue;
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}
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}
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plastino = ino;
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ino = nextino;
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}
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/*
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* Make sure all free inodes were found on the list
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*/
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for (ino = ROOTINO + 1; ino < maxino; ++ino) {
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if (visited[ino])
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continue;
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LFS_IENTRY(ifp, fs, ino, bp);
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if (ifp->if_daddr) {
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brelse(bp);
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continue;
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}
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pwarn("! Ino %d free, but not on the free list\n", ino);
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if (preen || reply("FIX") == 1) {
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ifp->if_nextfree = fs->lfs_freehd;
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fs->lfs_freehd = ino;
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sbdirty();
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VOP_BWRITE(bp);
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} else
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brelse(bp);
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}
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LFS_CLEANERINFO(cip, fs, bp);
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if (cip->free_head != fs->lfs_freehd) {
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pwarn("! Free list head should be %d (was %d)\n",
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fs->lfs_freehd, cip->free_head);
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if (preen || reply("FIX")) {
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cip->free_head = fs->lfs_freehd;
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writeit = 1;
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}
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}
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if (cip->free_tail != plastino) {
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pwarn("! Free list tail should be %d (was %d)\n", plastino,
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cip->free_tail);
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if (preen || reply("FIX")) {
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cip->free_tail = plastino;
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writeit = 1;
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}
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}
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if (writeit)
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LFS_SYNC_CLEANERINFO(cip, fs, bp, writeit);
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else
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brelse(bp);
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if (fs->lfs_freehd == 0) {
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pwarn("%sree list head is 0x0\n", preen ? "f" : "F");
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if (preen || reply("FIX"))
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extend_ifile();
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}
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/*
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* Check the distance between sequential free list entries.
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* An ideally ordered free list will have the sum of these
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* distances <= the number of inodes in the inode list.
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* If the observed distance is too high, reorder the list.
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* Strictly speaking, this is not an error, but it optimizes the
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* speed in creation of files and should help a tiny bit with
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* cleaner thrash as well.
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*/
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if (totaldist > 4 * maxino) {
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pwarn("%sotal inode list traversal length %lldx list length%s\n",
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(preen ? "t" : "T"), totaldist/maxino,
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(preen ? ", optimizing" : ""));
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if (preen || reply("OPTIMIZE") == 1) {
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plastino = lowfreeino;
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for (ino = lowfreeino + 1; ino < maxino; ino++) {
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LFS_IENTRY(ifp, fs, ino, bp);
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daddr = ifp->if_daddr;
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brelse(bp);
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if (daddr == 0) {
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LFS_IENTRY(ifp, fs, plastino, bp);
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ifp->if_nextfree = ino;
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VOP_BWRITE(bp);
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plastino = ino;
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}
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}
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LFS_CLEANERINFO(cip, fs, bp);
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cip->free_head = fs->lfs_freehd = lowfreeino;
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cip->free_tail = plastino;
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LFS_SYNC_CLEANERINFO(cip, fs, bp, 1);
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}
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}
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}
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