574 lines
12 KiB
C
574 lines
12 KiB
C
/* $Id: utilities.c,v 1.1 1999/03/18 02:02:19 perseant Exp $ */
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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. 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <signal.h>
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#include "fsutil.h"
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#include "fsck.h"
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#include "extern.h"
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long diskreads, totalreads; /* Disk cache statistics */
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static void rwerror __P((char *, daddr_t));
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int
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ftypeok(dp)
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struct dinode *dp;
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{
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switch (dp->di_mode & IFMT) {
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case IFDIR:
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case IFREG:
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case IFBLK:
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case IFCHR:
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case IFLNK:
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case IFSOCK:
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case IFIFO:
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return (1);
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default:
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if (debug)
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printf("bad file type 0%o\n", dp->di_mode);
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return (0);
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}
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}
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int
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reply(question)
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char *question;
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{
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int persevere;
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char c;
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if (preen)
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pfatal("INTERNAL ERROR: GOT TO reply()");
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persevere = !strcmp(question, "CONTINUE");
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printf("\n");
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if (!persevere && (nflag || fswritefd < 0)) {
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printf("%s? no\n\n", question);
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return (0);
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}
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if (yflag || (persevere && nflag)) {
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printf("%s? yes\n\n", question);
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return (1);
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}
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do {
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printf("%s? [yn] ", question);
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(void) fflush(stdout);
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c = getc(stdin);
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while (c != '\n' && getc(stdin) != '\n')
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if (feof(stdin))
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return (0);
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} while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
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printf("\n");
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if (c == 'y' || c == 'Y')
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return (1);
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return (0);
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}
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/*
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* Malloc buffers and set up cache.
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*/
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void
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bufinit()
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{
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register struct bufarea *bp;
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long bufcnt, i;
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char *bufp;
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pbp = pdirbp = (struct bufarea *)0;
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bufp = malloc((unsigned int)sblock.lfs_bsize);
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if (bufp == 0)
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errexit("cannot allocate buffer pool\n");
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/* cgblk.b_un.b_buf = bufp; */
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/* initbarea(&cgblk); */
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bufhead.b_next = bufhead.b_prev = &bufhead;
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bufcnt = MAXBUFSPACE / sblock.lfs_bsize;
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if (bufcnt < MINBUFS)
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bufcnt = MINBUFS;
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for (i = 0; i < bufcnt; i++) {
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bp = (struct bufarea *)malloc(sizeof(struct bufarea));
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bufp = malloc((unsigned int)sblock.lfs_bsize);
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if (bp == NULL || bufp == NULL) {
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if (i >= MINBUFS)
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break;
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errexit("cannot allocate buffer pool\n");
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}
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bp->b_un.b_buf = bufp;
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bp->b_prev = &bufhead;
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bp->b_next = bufhead.b_next;
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bufhead.b_next->b_prev = bp;
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bufhead.b_next = bp;
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initbarea(bp);
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}
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bufhead.b_size = i; /* save number of buffers */
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}
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/*
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* Manage a cache of directory blocks.
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*/
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struct bufarea *
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getddblk(blkno,size)
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daddr_t blkno;
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long size;
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{
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register struct bufarea *bp;
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for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)
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if (bp->b_bno == blkno) {
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if(bp->b_size <= size)
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getdblk(bp,blkno,size);
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goto foundit;
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}
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for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)
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if ((bp->b_flags & B_INUSE) == 0)
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break;
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if (bp == &bufhead)
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errexit("deadlocked buffer pool\n");
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getdblk(bp, blkno, size);
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/* fall through */
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foundit:
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totalreads++;
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bp->b_prev->b_next = bp->b_next;
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bp->b_next->b_prev = bp->b_prev;
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bp->b_prev = &bufhead;
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bp->b_next = bufhead.b_next;
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bufhead.b_next->b_prev = bp;
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bufhead.b_next = bp;
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bp->b_flags |= B_INUSE;
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return (bp);
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}
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struct bufarea *
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getdatablk(blkno, size)
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daddr_t blkno;
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long size;
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{
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return getddblk(fsbtodb(&sblock,blkno),size);
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}
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void
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getdblk(bp, blk, size)
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register struct bufarea *bp;
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daddr_t blk;
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long size;
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{
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if (bp->b_bno != blk) {
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flush(fswritefd, bp);
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diskreads++;
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bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, blk, size);
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bp->b_bno = blk;
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bp->b_size = size;
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}
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}
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void
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getblk(bp, blk, size)
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register struct bufarea *bp;
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daddr_t blk;
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long size;
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{
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getdblk(bp, fsbtodb(&sblock,blk), size);
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}
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void
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flush(fd, bp)
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int fd;
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register struct bufarea *bp;
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{
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if (!bp->b_dirty)
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return;
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if (bp->b_errs != 0)
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pfatal("WRITING %sZERO'ED BLOCK %d TO DISK\n",
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(bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
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bp->b_bno);
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bp->b_dirty = 0;
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bp->b_errs = 0;
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bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size);
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if (bp != &sblk)
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return;
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#if 0 /* XXX - FFS */
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for (i = 0, j = 0; i < sblock.lfs_cssize; i += sblock.lfs_bsize, j++) {
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bwrite(fswritefd, (char *)sblock.lfs_csp[j],
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fsbtodb(&sblock, sblock.lfs_csaddr + j * sblock.lfs_frag),
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sblock.lfs_cssize - i < sblock.lfs_bsize ?
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sblock.lfs_cssize - i : sblock.lfs_bsize);
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}
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#endif
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}
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static void
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rwerror(mesg, blk)
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char *mesg;
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daddr_t blk;
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{
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if (preen == 0)
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printf("\n");
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pfatal("CANNOT %s: BLK %d", mesg, blk);
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if (reply("CONTINUE") == 0)
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errexit("Program terminated\n");
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}
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void
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ckfini(markclean)
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int markclean;
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{
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register struct bufarea *bp, *nbp;
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int cnt = 0;
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if (fswritefd < 0) {
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(void)close(fsreadfd);
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return;
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}
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flush(fswritefd, &sblk);
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if (havesb && sblk.b_bno != LFS_SBPAD / dev_bsize &&
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!preen && reply("UPDATE STANDARD SUPERBLOCK")) {
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sblk.b_bno = LFS_SBPAD / dev_bsize;
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sbdirty();
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flush(fswritefd, &sblk);
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}
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/* flush(fswritefd, &cgblk); */
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/* free(cgblk.b_un.b_buf); */
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for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) {
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cnt++;
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flush(fswritefd, bp);
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nbp = bp->b_prev;
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free(bp->b_un.b_buf);
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free((char *)bp);
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}
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if (bufhead.b_size != cnt)
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errexit("Panic: lost %d buffers\n", bufhead.b_size - cnt);
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pbp = pdirbp = (struct bufarea *)0;
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#if 0 /* FFS */
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if (markclean && (sblock.lfs_clean & FS_ISCLEAN) == 0) {
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/*
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* Mark the file system as clean, and sync the superblock.
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*/
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if (preen)
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pwarn("MARKING FILE SYSTEM CLEAN\n");
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else if (!reply("MARK FILE SYSTEM CLEAN"))
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markclean = 0;
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if (markclean) {
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sblock.lfs_clean = FS_ISCLEAN;
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sbdirty();
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flush(fswritefd, &sblk);
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}
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}
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#endif
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if (debug)
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printf("cache missed %ld of %ld (%d%%)\n", diskreads,
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totalreads, (int)(diskreads * 100 / totalreads));
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(void)close(fsreadfd);
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(void)close(fswritefd);
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}
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int
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bread(fd, buf, blk, size)
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int fd;
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char *buf;
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daddr_t blk;
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long size;
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{
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char *cp;
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int i, errs;
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off_t offset;
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offset = blk;
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offset *= dev_bsize;
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if (lseek(fd, offset, 0) < 0) {
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rwerror("SEEK", blk);
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raise(1);
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}
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else if (read(fd, buf, (int)size) == size)
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return (0);
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rwerror("READ", blk);
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if (lseek(fd, offset, 0) < 0)
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rwerror("SEEK", blk);
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errs = 0;
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memset(buf, 0, (size_t)size);
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printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
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for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
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if (read(fd, cp, (int)secsize) != secsize) {
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(void)lseek(fd, offset + i + secsize, 0);
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if (secsize != dev_bsize && dev_bsize != 1)
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printf(" %ld (%ld),",
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(blk * dev_bsize + i) / secsize,
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blk + i / dev_bsize);
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else
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printf(" %ld,", blk + i / dev_bsize);
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errs++;
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}
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}
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printf("\n");
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return (errs);
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}
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void
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bwrite(fd, buf, blk, size)
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int fd;
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char *buf;
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daddr_t blk;
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long size;
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{
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int i;
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char *cp;
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off_t offset;
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if (fd < 0)
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return;
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offset = blk;
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offset *= dev_bsize;
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if (lseek(fd, offset, 0) < 0)
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rwerror("SEEK", blk);
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else if (write(fd, buf, (int)size) == size) {
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fsmodified = 1;
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return;
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}
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rwerror("WRITE", blk);
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if (lseek(fd, offset, 0) < 0)
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rwerror("SEEK", blk);
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printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
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for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
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if (write(fd, cp, (int)dev_bsize) != dev_bsize) {
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(void)lseek(fd, offset + i + dev_bsize, 0);
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printf(" %ld,", blk + i / dev_bsize);
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}
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printf("\n");
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return;
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}
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/*
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* allocate a data block with the specified number of fragments
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*/
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int
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allocblk(frags)
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long frags;
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{
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register int i, j, k;
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if (frags <= 0 || frags > sblock.lfs_frag)
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return (0);
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for (i = 0; i < maxfsblock - sblock.lfs_frag; i += sblock.lfs_frag) {
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for (j = 0; j <= sblock.lfs_frag - frags; j++) {
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if (testbmap(i + j))
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continue;
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for (k = 1; k < frags; k++)
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if (testbmap(i + j + k))
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break;
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if (k < frags) {
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j += k;
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continue;
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}
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for (k = 0; k < frags; k++) {
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#ifndef VERBOSE_BLOCKMAP
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setbmap(i + j + k);
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#else
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setbmap(i + j + k, -1);
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#endif
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}
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n_blks += frags;
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return (i + j);
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}
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}
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return (0);
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}
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/*
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* Free a previously allocated block
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*/
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void
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freeblk(blkno, frags)
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daddr_t blkno;
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long frags;
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{
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struct inodesc idesc;
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idesc.id_blkno = blkno;
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idesc.id_numfrags = frags;
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(void)pass4check(&idesc);
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}
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/*
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* Find a pathname
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*/
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void
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getpathname(namebuf, curdir, ino)
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char *namebuf;
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ino_t curdir, ino;
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{
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int len;
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register char *cp;
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struct inodesc idesc;
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static int busy = 0;
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if (curdir == ino && ino == ROOTINO) {
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(void)strcpy(namebuf, "/");
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return;
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}
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if (busy ||
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(statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) {
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(void)strcpy(namebuf, "?");
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return;
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}
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busy = 1;
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memset(&idesc, 0, sizeof(struct inodesc));
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idesc.id_type = DATA;
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idesc.id_fix = IGNORE;
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cp = &namebuf[MAXPATHLEN - 1];
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*cp = '\0';
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if (curdir != ino) {
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idesc.id_parent = curdir;
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goto namelookup;
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}
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while (ino != ROOTINO) {
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idesc.id_number = ino;
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idesc.id_func = findino;
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idesc.id_name = "..";
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if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
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break;
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namelookup:
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idesc.id_number = idesc.id_parent;
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idesc.id_parent = ino;
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idesc.id_func = findname;
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idesc.id_name = namebuf;
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if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
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break;
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len = strlen(namebuf);
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cp -= len;
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memcpy(cp, namebuf, (size_t)len);
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*--cp = '/';
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if (cp < &namebuf[MAXNAMLEN])
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break;
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ino = idesc.id_number;
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}
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busy = 0;
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if (ino != ROOTINO)
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*--cp = '?';
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memcpy(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
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}
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void
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catch(n)
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int n;
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{
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if (!doinglevel2)
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ckfini(0);
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exit(12);
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}
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/*
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* When preening, allow a single quit to signal
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* a special exit after filesystem checks complete
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* so that reboot sequence may be interrupted.
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*/
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void
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catchquit(n)
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int n;
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{
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extern int returntosingle;
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printf("returning to single-user after filesystem check\n");
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returntosingle = 1;
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(void)signal(SIGQUIT, SIG_DFL);
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}
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/*
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* Ignore a single quit signal; wait and flush just in case.
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* Used by child processes in preen.
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*/
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void
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voidquit(n)
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int n;
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{
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sleep(1);
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(void)signal(SIGQUIT, SIG_IGN);
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(void)signal(SIGQUIT, SIG_DFL);
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|
}
|
|
|
|
/*
|
|
* determine whether an inode should be fixed.
|
|
*/
|
|
int
|
|
dofix(idesc, msg)
|
|
register struct inodesc *idesc;
|
|
char *msg;
|
|
{
|
|
|
|
switch (idesc->id_fix) {
|
|
|
|
case DONTKNOW:
|
|
if (idesc->id_type == DATA)
|
|
direrror(idesc->id_number, msg);
|
|
else
|
|
pwarn(msg);
|
|
if (preen) {
|
|
printf(" (SALVAGED)\n");
|
|
idesc->id_fix = FIX;
|
|
return (ALTERED);
|
|
}
|
|
if (reply("SALVAGE") == 0) {
|
|
idesc->id_fix = NOFIX;
|
|
return (0);
|
|
}
|
|
idesc->id_fix = FIX;
|
|
return (ALTERED);
|
|
|
|
case FIX:
|
|
return (ALTERED);
|
|
|
|
case NOFIX:
|
|
case IGNORE:
|
|
return (0);
|
|
|
|
default:
|
|
errexit("UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|