134 lines
3.6 KiB
Bash
Executable File
134 lines
3.6 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) 2021 Peter Holm
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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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# lseek(SEEK_HOLE): finds hole
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# Test scenario suggestion by: kib@
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# Related to:
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# Bug 256205 - ZFS: data corruption with SEEK_HOLE/SEEK_DATA on dirty files ...
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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kldstat -v | grep -q zfs.ko || { kldload zfs.ko; loaded=1; } ||
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exit 0
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. ../default.cfg
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > zfs12.c
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mycc -o zfs12 -Wall -Wextra -O0 -g zfs12.c || exit 1
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rm -f zfs12.c
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cc -o /tmp/lsholes -Wall -Wextra -O2 $here/../tools/lsholes.c | exit 1
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mp1=/stress2_tank/test
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u1=$mdstart
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u2=$((u1 + 1))
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set -e
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mdconfig -l | grep -q md$u1 && mdconfig -d -u $u1
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mdconfig -l | grep -q md$u2 && mdconfig -d -u $u2
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mdconfig -s 2g -u $u1
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mdconfig -s 2g -u $u2
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zpool list | egrep -q "^stress2_tank" && zpool destroy stress2_tank
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[ -d /stress2_tank ] && rm -rf /stress2_tank
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zpool create stress2_tank md$u1 md$u2
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zfs create stress2_tank/test
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set +e
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(cd $here/../testcases/swap; ./swap -t 2m -i 20 -l 100 -h > /dev/null) &
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file1=$mp1/file # zfs path
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sleep 20
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/tmp/zfs12 $file1
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/tmp/lsholes $file1
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s=$?
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while pkill swap; do sleep 1; done
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wait
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zfs umount stress2_tank/test
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zfs destroy -r stress2_tank
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zpool destroy stress2_tank
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mdconfig -d -u $u1
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mdconfig -d -u $u2
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rm -f /tmp/zfs12 /tmp/lsholes
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[ $loaded ] && kldunload zfs.ko
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exit $s
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EOF
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#include <sys/types.h>
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#include <err.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 <fcntl.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#define SIZ (500UL * 1024 * 1024)
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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 hole;
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size_t len;
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int fd;
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char *p, *path;
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len = SIZ;
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path = argv[1];
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if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1)
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err(1,"open()");
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if (ftruncate(fd, len) == -1)
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err(1, "ftruncate");
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if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
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MAP_FAILED) {
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if (errno == ENOMEM)
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return (1);
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err(1, "mmap(1)");
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}
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p[1 * 1024] = 1;
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p[2 * 1024] = 1;
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p[4 * 1024] = 1;
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if (msync(p, len, MS_SYNC | MS_INVALIDATE) == -1)
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err(1, "msync()");
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if ((hole = lseek(fd, 0, SEEK_HOLE)) == -1)
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err(1, "lseek(SEEK_HOLE)");
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if (hole != SIZ)
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printf("--> hole = %jd, file size=%jd\n",
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(intmax_t)hole, (intmax_t)SIZ);
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close(fd);
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return (hole == SIZ ? 0 : 1);
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}
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