298 lines
10 KiB
C
298 lines
10 KiB
C
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/* $Id: pass0.c,v 1.1 1999/03/18 02:02:19 perseant Exp $ */
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/*
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* Copyright (c) 1998 Konrad E. Schroder.
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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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#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 <sys/mount.h>
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#include <ufs/lfs/lfs.h>
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#include <ufs/lfs/lfs_extern.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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#include "extern.h"
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#include "fsutil.h"
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/* Flags for check_segment */
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#define CKSEG_VERBOSE 1
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#define CKSEG_IGNORECLEAN 2
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extern int fake_cleanseg;
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void check_segment(int, int, daddr_t, struct lfs *, int, int (*)(struct lfs *, SEGSUM *, int, int, daddr_t, daddr_t));
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static int check_summary(struct lfs *, SEGSUM *, int, int, daddr_t, daddr_t);
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SEGUSE *lfs_gseguse(int);
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struct dinode **din_table;
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SEGUSE *seg_table;
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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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/* 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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#define dbshift (sblock.lfs_bshift - sblock.lfs_fsbtodb)
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void pass0()
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{
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int i;
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daddr_t seg_addr;
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/*
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* Run through the Ifile, to count and load the inodes into
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* a dynamic inode table.
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*/
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/*
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* Check the segments
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*/
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seg_addr = sblock.lfs_sboffs[0];
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for(i=0; i < sblock.lfs_nseg; i++)
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{
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seg_table[i] = *(lfs_gseguse(i));
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check_segment(fsreadfd, i, seg_addr, &sblock,
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CKSEG_IGNORECLEAN|CKSEG_VERBOSE, check_summary);
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seg_addr += (sblock.lfs_ssize << sblock.lfs_fsbtodb);
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}
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#if 0
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/* check to see which inodes we didn't get */
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printf("Unavailable inodes: ");
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for(i=1;i<maxino;i++) /* XXX ino 0 is never present */
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if(din_table[i]==NULL)
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{
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struct ifile *ifp;
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ifp = lfs_ientry(i);
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printf("(%d should be at daddr 0x%x)",i,ifp->if_daddr);
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}
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putchar('\n');
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#endif
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}
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static void dump_segsum(SEGSUM *sump, daddr_t addr)
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{
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printf("Dump partial summary block 0x%x\n",addr);
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printf("\tsumsum: %x (%d)\n",sump->ss_sumsum,sump->ss_sumsum);
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printf("\tdatasum: %x (%d)\n",sump->ss_datasum,sump->ss_datasum);
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printf("\tnext: %x (%d)\n",sump->ss_next,sump->ss_next);
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printf("\tcreate: %x (%d)\n",sump->ss_create,sump->ss_create);
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printf("\tnfinfo: %x (%d)\n",sump->ss_nfinfo,sump->ss_nfinfo);
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printf("\tninos: %x (%d)\n",sump->ss_ninos,sump->ss_ninos);
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printf("\tflags: %c%c\n",
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sump->ss_flags&SS_DIROP?'d':'-',
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sump->ss_flags&SS_CONT?'c':'-');
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}
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void check_segment(int fd, int segnum, daddr_t addr, struct lfs *fs, int flags, int (*func)(struct lfs *, SEGSUM *, int, int, daddr_t, daddr_t))
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{
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struct lfs *sbp;
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SEGSUM *sump=NULL;
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SEGUSE su;
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struct bufarea *bp = NULL;
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int psegnum=0, ninos=0;
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off_t sum_offset, db_ssize;
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int bc;
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db_ssize = sblock.lfs_ssize << sblock.lfs_fsbtodb;
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su = *(lfs_gseguse(segnum)); /* structure copy */
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if(fake_cleanseg >= 0 && segnum == fake_cleanseg)
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seg_table[segnum].su_flags &= ~SEGUSE_DIRTY;
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/* printf("Seg at 0x%x\n",addr); */
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if((flags & CKSEG_VERBOSE) && segnum*db_ssize + fs->lfs_sboffs[0] != addr)
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pwarn("WARNING: segment begins at 0x%qx, should be 0x%qx\n",
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(long long unsigned)addr, segnum*db_ssize + fs->lfs_sboffs[0]);
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sum_offset = ((off_t)addr << dbshift);
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/* If this segment should have a superblock, look for one */
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if(su.su_flags & SEGUSE_SUPERBLOCK) {
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bp = getddblk(sum_offset >> dbshift, LFS_SBPAD);
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sum_offset += LFS_SBPAD;
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/* check for a superblock -- XXX this is crude */
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sbp = (struct lfs *)(bp->b_un.b_buf);
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if(sbp->lfs_magic==LFS_MAGIC) {
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#if 0
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if(sblock.lfs_tstamp == sbp->lfs_tstamp
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&& memcmp(sbp,&sblock,sizeof(*sbp))
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&& (flags & CKSEG_VERBOSE))
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pwarn("SUPERBLOCK MISMATCH SEGMENT %d\n", segnum);
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#endif
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} else {
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if(flags & CKSEG_VERBOSE)
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pwarn("SEGMENT %d SUPERBLOCK INVALID\n",segnum);
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/* XXX allow to fix */
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}
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bp->b_flags &= ~B_INUSE;
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}
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/* XXX need to also check whether this one *should* be dirty */
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if((flags & CKSEG_IGNORECLEAN) && (su.su_flags & SEGUSE_DIRTY)==0)
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return;
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while(1) {
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if(su.su_nsums <= psegnum)
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break;
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bp = getddblk(sum_offset >> dbshift, LFS_SUMMARY_SIZE);
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sump = (SEGSUM *)(bp->b_un.b_buf);
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if (sump->ss_magic != SS_MAGIC) {
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if(flags & CKSEG_VERBOSE)
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printf("PARTIAL SEGMENT %d SEGMENT %d BAD PARTIAL SEGMENT MAGIC (0x%x should be 0x%x)\n",
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psegnum, segnum, sump->ss_magic, SS_MAGIC);
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bp->b_flags &= ~B_INUSE;
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break;
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}
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if(sump->ss_sumsum != cksum(&sump->ss_datasum, LFS_SUMMARY_SIZE - sizeof(sump->ss_sumsum))) {
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if(flags & CKSEG_VERBOSE) {
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/* Corrupt partial segment */
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pwarn("CORRUPT PARTIAL SEGMENT %d/%d OF SEGMENT %d AT BLK 0x%qx",
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psegnum, su.su_nsums, segnum, sum_offset>>dbshift);
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if(db_ssize < (sum_offset>>dbshift) - addr)
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pwarn(" (+0x%qx/0x%qx)",
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((sum_offset>>dbshift) - addr) - db_ssize,
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db_ssize);
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else
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pwarn(" (-0x%qx/0x%qx)",
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db_ssize - ((sum_offset>>dbshift) - addr),
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db_ssize);
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pwarn("\n");
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dump_segsum(sump,sum_offset>>dbshift);
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}
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/* XXX fix it maybe */
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bp->b_flags &= ~B_INUSE;
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break; /* XXX could be throwing away data, but if this segsum
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* is invalid, how to know where the next summary
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* begins? */
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}
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/*
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* Good partial segment
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*/
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bc = (*func)(&sblock, sump, segnum, psegnum, addr, (daddr_t)(sum_offset>>dbshift));
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if(bc) {
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sum_offset += LFS_SUMMARY_SIZE + bc;
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ninos += (sump->ss_ninos + INOPB(&sblock)-1)/INOPB(&sblock);
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psegnum++;
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} else {
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bp->b_flags &= ~B_INUSE;
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break;
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}
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bp->b_flags &= ~B_INUSE;
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}
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if(flags & CKSEG_VERBOSE) {
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if(ninos != su.su_ninos)
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pwarn("SEGMENT %d has %d ninos, not %d\n",
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segnum, ninos, su.su_ninos);
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if(psegnum != su.su_nsums)
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pwarn("SEGMENT %d has %d summaries, not %d\n",
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segnum, psegnum, su.su_nsums);
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}
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return;
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}
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static int check_summary(struct lfs *fs, SEGSUM *sp, int sn, int pn, daddr_t seg_addr, daddr_t pseg_addr)
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{
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FINFO *fp;
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int bc; /* Bytes in partial segment */
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daddr_t *dp;
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struct dinode *ip;
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struct bufarea *bp;
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int i, j, n;
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/* printf("Pseg at 0x%x, %d inos, %d finfos\n",addr>>dbshift,sp->ss_ninos,sp->ss_nfinfo); */
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/* We've already checked the sumsum, just do the data bounds and sum */
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bc = ((sp->ss_ninos + INOPB(fs) - 1) / INOPB(fs)) << fs->lfs_bshift;
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dp = (daddr_t *)sp;
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dp += LFS_SUMMARY_SIZE / sizeof(daddr_t);
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dp--;
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i=0;
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#if 0
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if(sp->ss_ninos==0 && sp->ss_nfinfo==0) {
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pwarn("SEGMENT %d PSEG %d IS EMPTY\n",sn,pn);
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return 0;
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}
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#endif
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while(i<sp->ss_ninos)
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{
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if(*dp < seg_addr || *dp > seg_addr + (sblock.lfs_ssize<<dbshift))
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{
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printf("Disk address 0x%x but should be in 0x%x--0x%x\n",
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*dp, seg_addr, seg_addr+(sblock.lfs_ssize<<dbshift));
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}
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bp = getddblk(*dp, (1<<fs->lfs_bshift));
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ip = (struct dinode *)bp->b_un.b_buf;
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for(j=0; i<sp->ss_ninos && j<INOPB(fs); j++) {
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/* check range */
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if(ip[j].di_inumber < 0 || ip[j].di_inumber > maxino)
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{
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pwarn("BAD INUM %d IN SEGMENT %d PARTIAL %d\n",
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ip[j].di_inumber, sn, pn);
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/* XXX Allow to fix (zero) this */
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} else {
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/* take a record of the highest-generation of each inode */
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n = ip[j].di_inumber;
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#if 1
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if(din_table[n]==NULL || din_table[n]->di_gen < ip[j].di_gen) {
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if(!din_table[n])
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din_table[n] = (struct dinode *)
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malloc(sizeof(struct dinode));
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memcpy(din_table[n],&ip[j],sizeof(struct dinode));
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}
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#endif
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}
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i++;
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}
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bp->b_flags &= ~B_INUSE;
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dp--;
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}
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fp = (FINFO *)(sp + 1);
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for(i=0; i<sp->ss_nfinfo; i++) {
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bc += fp->fi_lastlength + ((fp->fi_nblocks-1) << fs->lfs_bshift);
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/* XXX for now, ignore mismatches between segments' FINFO and IFILE */
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dp = &(fp->fi_blocks[0]);
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for(j=0; j<fp->fi_nblocks; j++) {
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/* XXX check values against inodes' known block size */
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dp++;
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}
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fp = (FINFO *)dp;
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}
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return bc;
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}
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