104 lines
3.0 KiB
Bash
Executable File
104 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2017 Konstantin Belousov <kib@FreeBSD.org>
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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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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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. ../default.cfg
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# Variation of nfs_halfpage.sh with a 2GB file.
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# Mark pages after EOF as clean after pageout.
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# https://reviews.freebsd.org/D11697
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# Committed as r321580 + r321581.
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dir=/tmp
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odir=`pwd`
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/nfs_halfpage.c
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mycc -o nfs_halfpage -Wall -Wextra -O0 -g nfs_halfpage.c || exit 1
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rm -f nfs_halfpage.c
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cd $odir
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[ -z "$nfs_export" ] && exit 0
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ping -c 2 `echo $nfs_export | sed 's/:.*//'` > /dev/null 2>&1 ||
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exit 0
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mount | grep "$mntpoint" | grep -q nfs && umount $mntpoint
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mount -t nfs -o tcp -o retrycnt=3 -o intr,soft -o rw $nfs_export $mntpoint
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file=$mntpoint/nfs_halfpage.file
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/tmp/nfs_halfpage $file
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ls -l $file
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echo "Reboot now to trigger syncing disks loop."
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sleep 60
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rm $file
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for i in `jot 6`; do
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mount | grep -q "on $mntpoint " || break
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umount $mntpoint && break || sleep 10
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done
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[ $i -eq 6 ] && exit 1
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rm -f /tmp/nfs_halfpage
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exit 0
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EOF
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/* $Id: nfs_halfpage.c,v 1.2 2017/07/23 09:36:23 kostik Exp kostik $ */
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#include <sys/types.h>
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#include <sys/fcntl.h>
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#include <sys/mman.h>
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#include <err.h>
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#include <unistd.h>
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int
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main(int argc __unused, char *argv[])
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{
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off_t sz;
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char *m;
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int error, fd, pgsz;
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pgsz = getpagesize();
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fd = open(argv[1], O_RDWR | O_CREAT | O_TRUNC, 0666);
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if (fd == -1)
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err(1, "open %s", argv[1]);
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sz = pgsz / 4;
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sz += 2LL * 1024 * 1024 * 1024;
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error = lseek(fd, sz, SEEK_SET);
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if (error == -1)
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err(1, "lseek");
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error = write(fd, "a", 1);
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if (error == -1)
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err(1, "write");
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else if (error != 1)
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errx(1, "short write");
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m = mmap(NULL, sz + 1, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (m == MAP_FAILED)
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err(1, "mmap");
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m[sz - 1] = 'x';
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}
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