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pass4.c revision 1.18 
      1 /*	$NetBSD: pass4.c,v 1.18 2003/08/07 10:04:21 agc Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 1986, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)pass4.c	8.4 (Berkeley) 4/28/95";
     36 #else
     37 __RCSID("$NetBSD: pass4.c,v 1.18 2003/08/07 10:04:21 agc Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <sys/param.h>
     42 #include <sys/time.h>
     43 
     44 #include <ufs/ufs/dinode.h>
     45 #include <ufs/ffs/fs.h>
     46 
     47 #include <err.h>
     48 #include <stdlib.h>
     49 #include <string.h>
     50 
     51 #include "fsutil.h"
     52 #include "fsck.h"
     53 #include "extern.h"
     54 
     55 void
     56 pass4()
     57 {
     58 	ino_t inumber;
     59 	struct zlncnt *zlnp;
     60 	union dinode *dp;
     61 	struct inodesc idesc;
     62 	int n, i, cg;
     63 	struct inostat *info;
     64 
     65 	memset(&idesc, 0, sizeof(struct inodesc));
     66 	idesc.id_type = ADDR;
     67 	idesc.id_func = pass4check;
     68 
     69 	for (cg = 0; cg < sblock->fs_ncg; cg++) {
     70 		if (got_siginfo) {
     71 			fprintf(stderr,
     72 			    "%s: phase 4: cyl group %d of %d (%d%%)\n",
     73 			    cdevname(), cg, sblock->fs_ncg,
     74 			    cg * 100 / sblock->fs_ncg);
     75 			got_siginfo = 0;
     76 		}
     77 		inumber = cg * sblock->fs_ipg;
     78 		for (i = 0; i < inostathead[cg].il_numalloced; i++, inumber++) {
     79 			if (inumber < ROOTINO)
     80 				continue;
     81 			info = inoinfo(inumber);
     82 			idesc.id_number = inumber;
     83 			switch (info->ino_state) {
     84 			case FSTATE:
     85 			case DFOUND:
     86 				n = info->ino_linkcnt;
     87 				if (n) {
     88 					adjust(&idesc, (short)n);
     89 					break;
     90 				}
     91 				for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
     92 					if (zlnp->zlncnt == inumber) {
     93 						zlnp->zlncnt = zlnhead->zlncnt;
     94 						zlnp = zlnhead;
     95 						zlnhead = zlnhead->next;
     96 						free((char *)zlnp);
     97 						clri(&idesc, "UNREF", 1);
     98 						break;
     99 					}
    100 				break;
    101 
    102 			case DSTATE:
    103 				clri(&idesc, "UNREF", 1);
    104 				break;
    105 
    106 			case DCLEAR:
    107 				dp = ginode(inumber);
    108 				if (DIP(dp, size) == 0) {
    109 					clri(&idesc, "ZERO LENGTH", 1);
    110 					break;
    111 				}
    112 				/* fall through */
    113 			case FCLEAR:
    114 				clri(&idesc, "BAD/DUP", 1);
    115 				break;
    116 
    117 			case USTATE:
    118 				break;
    119 
    120 			default:
    121 				errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
    122 				    info->ino_state, inumber);
    123 			}
    124 		}
    125 	}
    126 }
    127 
    128 int
    129 pass4check(idesc)
    130 	struct inodesc *idesc;
    131 {
    132 	struct dups *dlp;
    133 	int nfrags, res = KEEPON;
    134 	daddr_t blkno = idesc->id_blkno;
    135 
    136 	for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
    137 		if (chkrange(blkno, 1)) {
    138 			res = SKIP;
    139 		} else if (testbmap(blkno)) {
    140 			for (dlp = duplist; dlp; dlp = dlp->next) {
    141 				if (dlp->dup != blkno)
    142 					continue;
    143 				dlp->dup = duplist->dup;
    144 				dlp = duplist;
    145 				duplist = duplist->next;
    146 				free((char *)dlp);
    147 				break;
    148 			}
    149 			if (dlp == 0) {
    150 				clrbmap(blkno);
    151 				n_blks--;
    152 			}
    153 		}
    154 	}
    155 	return (res);
    156 }
    157