NetBSD/sbin/fsck_lfs/pass4.c

181 lines
4.5 KiB
C

/* $NetBSD: pass4.c,v 1.28 2020/04/03 19:36:33 joerg Exp $ */
/*
* 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. 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 <sys/mount.h>
#define vnode uvnode
#define buf ubuf
#define panic call_panic
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_accessors.h>
#include <ufs/lfs/lfs_inode.h>
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include "bufcache.h"
#include "lfs_user.h"
#include "fsutil.h"
#include "fsck.h"
#include "extern.h"
static int check_orphan(struct inodesc *idp);
static int
check_orphan(struct inodesc *idp)
{
struct zlncnt *zlnp;
ino_t inumber = idp->id_number;
for (zlnp = orphead; zlnp; zlnp = zlnp->next) {
if (zlnp->zlncnt == inumber) {
/* Swap this with head */
zlnp->zlncnt = orphead->zlncnt;
zlnp = orphead;
orphead = orphead->next;
/* Free old head */
free((char *) zlnp);
clri(idp, "PROPERLY ORPHANED", 1);
return 1;
}
}
return 0;
}
void
pass4(void)
{
ino_t inumber;
struct zlncnt *zlnp;
union lfs_dinode *dp;
struct inodesc idesc;
int n;
memset(&idesc, 0, sizeof(struct inodesc));
idesc.id_type = ADDR;
idesc.id_func = pass4check;
for (inumber = ULFS_ROOTINO; inumber <= lastino; inumber++) {
idesc.id_number = inumber;
switch (statemap[inumber]) {
case FSTATE:
case DFOUND:
n = lncntp[inumber];
if (n)
adjust(&idesc, (short) n);
else {
for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
if (zlnp->zlncnt == inumber) {
zlnp->zlncnt = zlnhead->zlncnt;
zlnp = zlnhead;
zlnhead = zlnhead->next;
free((char *) zlnp);
clri(&idesc, "UNREF", 1);
break;
}
}
break;
case DSTATE:
clri(&idesc, "UNREF", 1);
break;
case DCLEAR:
if (check_orphan(&idesc))
break;
dp = ginode(inumber);
if (lfs_dino_getsize(fs, dp) == 0) {
const char * msg = (lncntp[inumber] ?
"ZERO LENGTH" : "UNREF ZERO LENGTH");
clri(&idesc, msg, 1);
break;
}
clri(&idesc, "BAD/DUP", 1);
break;
case FCLEAR:
if (check_orphan(&idesc))
break;
clri(&idesc, "BAD/DUP", 1);
break;
case USTATE:
break;
default:
err(EEXIT, "BAD STATE %d FOR INODE I=%llu",
statemap[inumber], (unsigned long long)inumber);
}
}
}
int
pass4check(struct inodesc * idesc)
{
struct dups *dlp;
int ndblks, res = KEEPON;
daddr_t blkno = idesc->id_blkno;
SEGUSE *sup;
struct ubuf *bp;
int sn;
sn = lfs_dtosn(fs, blkno);
for (ndblks = idesc->id_numfrags; ndblks > 0; blkno++, ndblks--) {
if (chkrange(blkno, 1)) {
res = SKIP;
} else if (testbmap(blkno) || preen) {
for (dlp = duplist; dlp; dlp = dlp->next) {
if (dlp->dup != blkno)
continue;
dlp->dup = duplist->dup;
dlp = duplist;
duplist = duplist->next;
free((char *) dlp);
break;
}
if (dlp == 0) {
clrbmap(blkno);
LFS_SEGENTRY(sup, fs, sn, bp);
sup->su_nbytes -= lfs_fsbtob(fs, 1);
VOP_BWRITE(bp);
seg_table[sn].su_nbytes -= lfs_fsbtob(fs, 1);
lfs_sb_addbfree(fs, 1);
n_blks--;
}
}
}
return (res);
}