08983aee40
shuffles the timing and sleep calls in bgfsck from: sleep timer_on io timer_off io io io io io io io to sleep io io io io io io io timer_on io timer_off The original method basically guaranteed that the timed I/O included a disk seek every time, which made bgfsck sleep for much longer than necessary. Submitted by: Dan Nelson Reviewed by: kirk
712 lines
16 KiB
C
712 lines
16 KiB
C
/*
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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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* 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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#if 0
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#ifndef lint
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static const char sccsid[] = "@(#)utilities.c 8.6 (Berkeley) 5/19/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <sys/disklabel.h>
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#include <sys/stat.h>
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#include <sys/disklabel.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <errno.h>
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#include <string.h>
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#include <ctype.h>
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#include <fstab.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "fsck.h"
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static void slowio_start(void);
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static void slowio_end(void);
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long diskreads, totalreads; /* Disk cache statistics */
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struct timeval slowio_starttime;
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int slowio_delay_usec = 10000; /* Initial IO delay for background fsck */
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int slowio_pollcnt;
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int
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ftypeok(union dinode *dp)
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{
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switch (DIP(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", DIP(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(const 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 && bkgrdflag == 0))) {
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printf("%s? no\n\n", question);
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resolved = 0;
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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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resolved = 0;
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return (0);
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}
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}
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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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resolved = 0;
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return (0);
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}
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/*
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* Look up state information for an inode.
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*/
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struct inostat *
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inoinfo(ino_t inum)
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{
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static struct inostat unallocated = { USTATE, 0, 0 };
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struct inostatlist *ilp;
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int iloff;
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if (inum > maxino)
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errx(EEXIT, "inoinfo: inumber %d out of range", inum);
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ilp = &inostathead[inum / sblock.fs_ipg];
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iloff = inum % sblock.fs_ipg;
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if (iloff >= ilp->il_numalloced)
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return (&unallocated);
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return (&ilp->il_stat[iloff]);
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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(void)
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{
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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.fs_bsize);
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if (bufp == 0)
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errx(EEXIT, "cannot allocate buffer pool");
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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.fs_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.fs_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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errx(EEXIT, "cannot allocate buffer pool");
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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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getdatablk(ufs2_daddr_t blkno, long size)
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{
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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 == fsbtodb(&sblock, blkno))
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goto foundit;
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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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errx(EEXIT, "deadlocked buffer pool");
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getblk(bp, blkno, size);
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/* fall through */
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foundit:
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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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void
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getblk(struct bufarea *bp, ufs2_daddr_t blk, long size)
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{
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ufs2_daddr_t dblk;
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totalreads++;
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dblk = fsbtodb(&sblock, blk);
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if (bp->b_bno != dblk) {
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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, dblk, size);
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bp->b_bno = dblk;
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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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flush(int fd, struct bufarea *bp)
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{
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int i, j;
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if (!bp->b_dirty)
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return;
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bp->b_dirty = 0;
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if (fswritefd < 0) {
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pfatal("WRITING IN READ_ONLY MODE.\n");
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return;
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}
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if (bp->b_errs != 0)
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pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
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(bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
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(long long)bp->b_bno);
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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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for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
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bwrite(fswritefd, (char *)sblock.fs_csp + i,
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fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
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sblock.fs_cssize - i < sblock.fs_bsize ?
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sblock.fs_cssize - i : sblock.fs_bsize);
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}
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}
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void
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rwerror(const char *mesg, ufs2_daddr_t blk)
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{
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if (bkgrdcheck)
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exit(EEXIT);
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if (preen == 0)
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printf("\n");
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pfatal("CANNOT %s: %ld", mesg, (long)blk);
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if (reply("CONTINUE") == 0)
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exit(EEXIT);
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}
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void
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ckfini(int markclean)
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{
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struct bufarea *bp, *nbp;
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int ofsmodified, cnt = 0;
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if (bkgrdflag) {
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unlink(snapname);
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if ((!(sblock.fs_flags & FS_UNCLEAN)) != markclean) {
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cmd.value = FS_UNCLEAN;
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cmd.size = markclean ? -1 : 1;
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if (sysctlbyname("vfs.ffs.setflags", 0, 0,
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&cmd, sizeof cmd) == -1)
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rwerror("SET FILE SYSTEM FLAGS", FS_UNCLEAN);
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if (!preen) {
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printf("\n***** FILE SYSTEM MARKED %s *****\n",
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markclean ? "CLEAN" : "DIRTY");
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if (!markclean)
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rerun = 1;
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}
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} else if (!preen && !markclean) {
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printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
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rerun = 1;
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}
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}
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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 && cursnapshot == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
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sblk.b_bno != sblock.fs_sblockloc / dev_bsize &&
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!preen && reply("UPDATE STANDARD SUPERBLOCK")) {
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sblk.b_bno = sblock.fs_sblockloc / 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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errx(EEXIT, "panic: lost %d buffers", bufhead.b_size - cnt);
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pbp = pdirbp = (struct bufarea *)0;
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if (cursnapshot == 0 && sblock.fs_clean != markclean) {
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if ((sblock.fs_clean = markclean) != 0) {
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sblock.fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK);
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sblock.fs_pendingblocks = 0;
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sblock.fs_pendinginodes = 0;
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}
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sbdirty();
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ofsmodified = fsmodified;
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flush(fswritefd, &sblk);
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fsmodified = ofsmodified;
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if (!preen) {
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printf("\n***** FILE SYSTEM MARKED %s *****\n",
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markclean ? "CLEAN" : "DIRTY");
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if (!markclean)
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rerun = 1;
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}
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} else if (!preen && !markclean) {
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printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
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rerun = 1;
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}
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if (debug && totalreads > 0)
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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(int fd, char *buf, ufs2_daddr_t blk, 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 (bkgrdflag)
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slowio_start();
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if (lseek(fd, offset, 0) < 0)
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rwerror("SEEK BLK", blk);
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else if (read(fd, buf, (int)size) == size) {
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if (bkgrdflag)
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slowio_end();
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return (0);
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}
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rwerror("READ BLK", blk);
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if (lseek(fd, offset, 0) < 0)
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rwerror("SEEK BLK", 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(" %jd (%jd),",
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(intmax_t)(blk * dev_bsize + i) / secsize,
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(intmax_t)blk + i / dev_bsize);
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else
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printf(" %jd,", (intmax_t)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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if (errs)
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resolved = 0;
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return (errs);
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}
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void
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bwrite(int fd, char *buf, ufs2_daddr_t blk, 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", 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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resolved = 0;
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rwerror("WRITE BLK", blk);
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if (lseek(fd, offset, 0) < 0)
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rwerror("SEEK BLK", 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(" %jd,", (intmax_t)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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ufs2_daddr_t
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allocblk(long frags)
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{
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int i, j, k, cg, baseblk;
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struct cg *cgp = &cgrp;
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if (frags <= 0 || frags > sblock.fs_frag)
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return (0);
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for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
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for (j = 0; j <= sblock.fs_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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cg = dtog(&sblock, i + j);
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getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
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if (!cg_chkmagic(cgp))
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pfatal("CG %d: BAD MAGIC NUMBER\n", cg);
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baseblk = dtogd(&sblock, i + j);
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for (k = 0; k < frags; k++) {
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setbmap(i + j + k);
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clrbit(cg_blksfree(cgp), baseblk + k);
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}
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n_blks += frags;
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if (frags == sblock.fs_frag)
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cgp->cg_cs.cs_nbfree--;
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else
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cgp->cg_cs.cs_nffree -= frags;
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cgdirty();
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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(ufs2_daddr_t blkno, 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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/* Slow down IO so as to leave some disk bandwidth for other processes */
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void
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slowio_start()
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{
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/* Delay one in every 8 operations */
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slowio_pollcnt = (slowio_pollcnt + 1) & 7;
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if (slowio_pollcnt == 0) {
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gettimeofday(&slowio_starttime, NULL);
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}
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}
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void
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slowio_end()
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{
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struct timeval tv;
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int delay_usec;
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if (slowio_pollcnt != 0)
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return;
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/* Update the slowdown interval. */
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gettimeofday(&tv, NULL);
|
|
delay_usec = (tv.tv_sec - slowio_starttime.tv_sec) * 1000000 +
|
|
(tv.tv_usec - slowio_starttime.tv_usec);
|
|
if (delay_usec < 64)
|
|
delay_usec = 64;
|
|
if (delay_usec > 2500000)
|
|
delay_usec = 2500000;
|
|
slowio_delay_usec = (slowio_delay_usec * 63 + delay_usec) >> 6;
|
|
/* delay by 8 times the average IO delay */
|
|
if (slowio_delay_usec > 64)
|
|
usleep(slowio_delay_usec * 8);
|
|
}
|
|
|
|
/*
|
|
* Find a pathname
|
|
*/
|
|
void
|
|
getpathname(char *namebuf, ino_t curdir, ino_t ino)
|
|
{
|
|
int len;
|
|
char *cp;
|
|
struct inodesc idesc;
|
|
static int busy = 0;
|
|
|
|
if (curdir == ino && ino == ROOTINO) {
|
|
(void)strcpy(namebuf, "/");
|
|
return;
|
|
}
|
|
if (busy ||
|
|
(inoinfo(curdir)->ino_state != DSTATE &&
|
|
inoinfo(curdir)->ino_state != DFOUND)) {
|
|
(void)strcpy(namebuf, "?");
|
|
return;
|
|
}
|
|
busy = 1;
|
|
memset(&idesc, 0, sizeof(struct inodesc));
|
|
idesc.id_type = DATA;
|
|
idesc.id_fix = IGNORE;
|
|
cp = &namebuf[MAXPATHLEN - 1];
|
|
*cp = '\0';
|
|
if (curdir != ino) {
|
|
idesc.id_parent = curdir;
|
|
goto namelookup;
|
|
}
|
|
while (ino != ROOTINO) {
|
|
idesc.id_number = ino;
|
|
idesc.id_func = findino;
|
|
idesc.id_name = strdup("..");
|
|
if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
|
|
break;
|
|
namelookup:
|
|
idesc.id_number = idesc.id_parent;
|
|
idesc.id_parent = ino;
|
|
idesc.id_func = findname;
|
|
idesc.id_name = namebuf;
|
|
if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
|
|
break;
|
|
len = strlen(namebuf);
|
|
cp -= len;
|
|
memmove(cp, namebuf, (size_t)len);
|
|
*--cp = '/';
|
|
if (cp < &namebuf[MAXNAMLEN])
|
|
break;
|
|
ino = idesc.id_number;
|
|
}
|
|
busy = 0;
|
|
if (ino != ROOTINO)
|
|
*--cp = '?';
|
|
memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
|
|
}
|
|
|
|
void
|
|
catch(int sig __unused)
|
|
{
|
|
|
|
ckfini(0);
|
|
exit(12);
|
|
}
|
|
|
|
/*
|
|
* When preening, allow a single quit to signal
|
|
* a special exit after file system checks complete
|
|
* so that reboot sequence may be interrupted.
|
|
*/
|
|
void
|
|
catchquit(int sig __unused)
|
|
{
|
|
printf("returning to single-user after file system check\n");
|
|
returntosingle = 1;
|
|
(void)signal(SIGQUIT, SIG_DFL);
|
|
}
|
|
|
|
/*
|
|
* determine whether an inode should be fixed.
|
|
*/
|
|
int
|
|
dofix(struct inodesc *idesc, const char *msg)
|
|
{
|
|
|
|
switch (idesc->id_fix) {
|
|
|
|
case DONTKNOW:
|
|
if (idesc->id_type == DATA)
|
|
direrror(idesc->id_number, msg);
|
|
else
|
|
pwarn("%s", 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:
|
|
errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix);
|
|
}
|
|
/* NOTREACHED */
|
|
return (0);
|
|
}
|
|
|
|
#include <stdarg.h>
|
|
|
|
/*
|
|
* An unexpected inconsistency occured.
|
|
* Die if preening or file system is running with soft dependency protocol,
|
|
* otherwise just print message and continue.
|
|
*/
|
|
void
|
|
pfatal(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
if (!preen) {
|
|
(void)vfprintf(stdout, fmt, ap);
|
|
va_end(ap);
|
|
if (usedsoftdep)
|
|
(void)fprintf(stdout,
|
|
"\nUNEXPECTED SOFT UPDATE INCONSISTENCY\n");
|
|
/*
|
|
* Force foreground fsck to clean up inconsistency.
|
|
*/
|
|
if (bkgrdflag) {
|
|
cmd.value = FS_NEEDSFSCK;
|
|
cmd.size = 1;
|
|
if (sysctlbyname("vfs.ffs.setflags", 0, 0,
|
|
&cmd, sizeof cmd) == -1)
|
|
pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
|
|
fprintf(stdout, "CANNOT RUN IN BACKGROUND\n");
|
|
ckfini(0);
|
|
exit(EEXIT);
|
|
}
|
|
return;
|
|
}
|
|
if (cdevname == NULL)
|
|
cdevname = strdup("fsck");
|
|
(void)fprintf(stdout, "%s: ", cdevname);
|
|
(void)vfprintf(stdout, fmt, ap);
|
|
(void)fprintf(stdout,
|
|
"\n%s: UNEXPECTED%sINCONSISTENCY; RUN fsck MANUALLY.\n",
|
|
cdevname, usedsoftdep ? " SOFT UPDATE " : " ");
|
|
/*
|
|
* Force foreground fsck to clean up inconsistency.
|
|
*/
|
|
if (bkgrdflag) {
|
|
cmd.value = FS_NEEDSFSCK;
|
|
cmd.size = 1;
|
|
if (sysctlbyname("vfs.ffs.setflags", 0, 0,
|
|
&cmd, sizeof cmd) == -1)
|
|
pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
|
|
}
|
|
ckfini(0);
|
|
exit(EEXIT);
|
|
}
|
|
|
|
/*
|
|
* Pwarn just prints a message when not preening or running soft dependency
|
|
* protocol, or a warning (preceded by filename) when preening.
|
|
*/
|
|
void
|
|
pwarn(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
if (preen)
|
|
(void)fprintf(stdout, "%s: ", cdevname);
|
|
(void)vfprintf(stdout, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
/*
|
|
* Stub for routines from kernel.
|
|
*/
|
|
void
|
|
panic(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
pfatal("INTERNAL INCONSISTENCY:");
|
|
(void)vfprintf(stdout, fmt, ap);
|
|
va_end(ap);
|
|
exit(EEXIT);
|
|
}
|