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NetBSD/sbin/fsck_lfs/pass0.c

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/* $NetBSD: pass0.c,v 1.3 1999/07/03 19:55:03 kleink Exp $ */
/*
* Copyright (c) 1998 Konrad E. Schroder.
* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/time.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <sys/mount.h>
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_extern.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "fsck.h"
#include "extern.h"
#include "fsutil.h"
/* Flags for check_segment */
#define CKSEG_VERBOSE 1
#define CKSEG_IGNORECLEAN 2
extern int fake_cleanseg;
void check_segment(int, int, daddr_t, struct lfs *, int, int (*)(struct lfs *, SEGSUM *, int, int, daddr_t, daddr_t));
static int check_summary(struct lfs *, SEGSUM *, int, int, daddr_t, daddr_t);
SEGUSE *lfs_gseguse(int);
struct dinode **din_table;
SEGUSE *seg_table;
/*
* Pass 0. Check the LFS partial segments for valid checksums, correcting
* if necessary. Also check for valid offsets for inode and finfo blocks.
*/
/* XXX more could be done here---consistency between inode-held blocks and
finfo blocks, for one thing. */
#define dbshift (sblock.lfs_bshift - sblock.lfs_fsbtodb)
void pass0()
{
int i;
daddr_t seg_addr;
/*
* Run through the Ifile, to count and load the inodes into
* a dynamic inode table.
*/
/*
* Check the segments
*/
seg_addr = sblock.lfs_sboffs[0];
for(i=0; i < sblock.lfs_nseg; i++)
{
seg_table[i] = *(lfs_gseguse(i));
check_segment(fsreadfd, i, seg_addr, &sblock,
CKSEG_IGNORECLEAN|CKSEG_VERBOSE, check_summary);
seg_addr += (sblock.lfs_ssize << sblock.lfs_fsbtodb);
}
#if 0
/* check to see which inodes we didn't get */
printf("Unavailable inodes: ");
for(i=1;i<maxino;i++) /* XXX ino 0 is never present */
if(din_table[i]==NULL)
{
struct ifile *ifp;
ifp = lfs_ientry(i);
printf("(%d should be at daddr 0x%x)",i,ifp->if_daddr);
}
putchar('\n');
#endif
}
static void dump_segsum(SEGSUM *sump, daddr_t addr)
{
printf("Dump partial summary block 0x%x\n",addr);
printf("\tsumsum: %x (%d)\n",sump->ss_sumsum,sump->ss_sumsum);
printf("\tdatasum: %x (%d)\n",sump->ss_datasum,sump->ss_datasum);
printf("\tnext: %x (%d)\n",sump->ss_next,sump->ss_next);
printf("\tcreate: %x (%d)\n",sump->ss_create,sump->ss_create);
printf("\tnfinfo: %x (%d)\n",sump->ss_nfinfo,sump->ss_nfinfo);
printf("\tninos: %x (%d)\n",sump->ss_ninos,sump->ss_ninos);
printf("\tflags: %c%c\n",
sump->ss_flags&SS_DIROP?'d':'-',
sump->ss_flags&SS_CONT?'c':'-');
}
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))
{
struct lfs *sbp;
SEGSUM *sump=NULL;
SEGUSE su;
struct bufarea *bp = NULL;
int psegnum=0, ninos=0;
off_t sum_offset, db_ssize;
int bc;
db_ssize = sblock.lfs_ssize << sblock.lfs_fsbtodb;
su = *(lfs_gseguse(segnum)); /* structure copy */
if(fake_cleanseg >= 0 && segnum == fake_cleanseg)
seg_table[segnum].su_flags &= ~SEGUSE_DIRTY;
/* printf("Seg at 0x%x\n",addr); */
if((flags & CKSEG_VERBOSE) && segnum*db_ssize + fs->lfs_sboffs[0] != addr)
pwarn("WARNING: segment begins at 0x%qx, should be 0x%qx\n",
(long long unsigned)addr,
(long long unsigned)(segnum*db_ssize + fs->lfs_sboffs[0]));
sum_offset = ((off_t)addr << dbshift);
/* If this segment should have a superblock, look for one */
if(su.su_flags & SEGUSE_SUPERBLOCK) {
bp = getddblk(sum_offset >> dbshift, LFS_SBPAD);
sum_offset += LFS_SBPAD;
/* check for a superblock -- XXX this is crude */
sbp = (struct lfs *)(bp->b_un.b_buf);
if(sbp->lfs_magic==LFS_MAGIC) {
#if 0
if(sblock.lfs_tstamp == sbp->lfs_tstamp
&& memcmp(sbp,&sblock,sizeof(*sbp))
&& (flags & CKSEG_VERBOSE))
pwarn("SUPERBLOCK MISMATCH SEGMENT %d\n", segnum);
#endif
} else {
if(flags & CKSEG_VERBOSE)
pwarn("SEGMENT %d SUPERBLOCK INVALID\n",segnum);
/* XXX allow to fix */
}
bp->b_flags &= ~B_INUSE;
}
/* XXX need to also check whether this one *should* be dirty */
if((flags & CKSEG_IGNORECLEAN) && (su.su_flags & SEGUSE_DIRTY)==0)
return;
while(1) {
if(su.su_nsums <= psegnum)
break;
bp = getddblk(sum_offset >> dbshift, LFS_SUMMARY_SIZE);
sump = (SEGSUM *)(bp->b_un.b_buf);
if (sump->ss_magic != SS_MAGIC) {
if(flags & CKSEG_VERBOSE)
printf("PARTIAL SEGMENT %d SEGMENT %d BAD PARTIAL SEGMENT MAGIC (0x%x should be 0x%x)\n",
psegnum, segnum, sump->ss_magic, SS_MAGIC);
bp->b_flags &= ~B_INUSE;
break;
}
if(sump->ss_sumsum != cksum(&sump->ss_datasum, LFS_SUMMARY_SIZE - sizeof(sump->ss_sumsum))) {
if(flags & CKSEG_VERBOSE) {
/* Corrupt partial segment */
pwarn("CORRUPT PARTIAL SEGMENT %d/%d OF SEGMENT %d AT BLK 0x%qx",
psegnum, su.su_nsums, segnum,
(unsigned long long)sum_offset>>dbshift);
if(db_ssize < (sum_offset>>dbshift) - addr)
pwarn(" (+0x%qx/0x%qx)",
(unsigned long long)(((sum_offset>>dbshift) - addr) -
db_ssize),
(unsigned long long)db_ssize);
else
pwarn(" (-0x%qx/0x%qx)",
(unsigned long long)(db_ssize -
((sum_offset>>dbshift) - addr)),
(unsigned long long)db_ssize);
pwarn("\n");
dump_segsum(sump,sum_offset>>dbshift);
}
/* XXX fix it maybe */
bp->b_flags &= ~B_INUSE;
break; /* XXX could be throwing away data, but if this segsum
* is invalid, how to know where the next summary
* begins? */
}
/*
* Good partial segment
*/
bc = (*func)(&sblock, sump, segnum, psegnum, addr, (daddr_t)(sum_offset>>dbshift));
if(bc) {
sum_offset += LFS_SUMMARY_SIZE + bc;
ninos += (sump->ss_ninos + INOPB(&sblock)-1)/INOPB(&sblock);
psegnum++;
} else {
bp->b_flags &= ~B_INUSE;
break;
}
bp->b_flags &= ~B_INUSE;
}
if(flags & CKSEG_VERBOSE) {
if(ninos != su.su_ninos)
pwarn("SEGMENT %d has %d ninos, not %d\n",
segnum, ninos, su.su_ninos);
if(psegnum != su.su_nsums)
pwarn("SEGMENT %d has %d summaries, not %d\n",
segnum, psegnum, su.su_nsums);
}
return;
}
static int check_summary(struct lfs *fs, SEGSUM *sp, int sn, int pn, daddr_t seg_addr, daddr_t pseg_addr)
{
FINFO *fp;
int bc; /* Bytes in partial segment */
daddr_t *dp;
struct dinode *ip;
struct bufarea *bp;
int i, j, n;
/* printf("Pseg at 0x%x, %d inos, %d finfos\n",addr>>dbshift,sp->ss_ninos,sp->ss_nfinfo); */
/* We've already checked the sumsum, just do the data bounds and sum */
bc = ((sp->ss_ninos + INOPB(fs) - 1) / INOPB(fs)) << fs->lfs_bshift;
dp = (daddr_t *)sp;
dp += LFS_SUMMARY_SIZE / sizeof(daddr_t);
dp--;
i=0;
#if 0
if(sp->ss_ninos==0 && sp->ss_nfinfo==0) {
pwarn("SEGMENT %d PSEG %d IS EMPTY\n",sn,pn);
return 0;
}
#endif
while(i<sp->ss_ninos)
{
if(*dp < seg_addr || *dp > seg_addr + (sblock.lfs_ssize<<dbshift))
{
printf("Disk address 0x%x but should be in 0x%x--0x%x\n",
*dp, seg_addr, seg_addr+(sblock.lfs_ssize<<dbshift));
}
bp = getddblk(*dp, (1<<fs->lfs_bshift));
ip = (struct dinode *)bp->b_un.b_buf;
for(j=0; i<sp->ss_ninos && j<INOPB(fs); j++) {
/* check range */
if(ip[j].di_inumber < 0 || ip[j].di_inumber > maxino)
{
pwarn("BAD INUM %d IN SEGMENT %d PARTIAL %d\n",
ip[j].di_inumber, sn, pn);
/* XXX Allow to fix (zero) this */
} else {
/* take a record of the highest-generation of each inode */
n = ip[j].di_inumber;
#if 1
if(din_table[n]==NULL || din_table[n]->di_gen < ip[j].di_gen) {
if(!din_table[n])
din_table[n] = (struct dinode *)
malloc(sizeof(struct dinode));
memcpy(din_table[n],&ip[j],sizeof(struct dinode));
}
#endif
}
i++;
}
bp->b_flags &= ~B_INUSE;
dp--;
}
fp = (FINFO *)(sp + 1);
for(i=0; i<sp->ss_nfinfo; i++) {
bc += fp->fi_lastlength + ((fp->fi_nblocks-1) << fs->lfs_bshift);
/* XXX for now, ignore mismatches between segments' FINFO and IFILE */
dp = &(fp->fi_blocks[0]);
for(j=0; j<fp->fi_nblocks; j++) {
/* XXX check values against inodes' known block size */
dp++;
}
fp = (FINFO *)dp;
}
return bc;
}
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