1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2021 Peter Holm 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# lseek(SEEK_HOLE): finds hole 31# Test scenario suggestion by: kib@ 32# Related to: 33# Bug 256205 - ZFS: data corruption with SEEK_HOLE/SEEK_DATA on dirty files ... 34 35[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 36kldstat -v | grep -q zfs.ko || { kldload zfs.ko; loaded=1; } || 37 exit 0 38 39. ../default.cfg 40 41here=`pwd` 42cd /tmp 43sed '1,/^EOF/d' < $here/$0 > zfs12.c 44mycc -o zfs12 -Wall -Wextra -O0 -g zfs12.c || exit 1 45rm -f zfs12.c 46cc -o /tmp/lsholes -Wall -Wextra -O2 $here/../tools/lsholes.c | exit 1 47 48mp1=/stress2_tank/test 49u1=$mdstart 50u2=$((u1 + 1)) 51 52set -e 53mdconfig -l | grep -q md$u1 && mdconfig -d -u $u1 54mdconfig -l | grep -q md$u2 && mdconfig -d -u $u2 55 56mdconfig -s 2g -u $u1 57mdconfig -s 2g -u $u2 58 59zpool list | egrep -q "^stress2_tank" && zpool destroy stress2_tank 60[ -d /stress2_tank ] && rm -rf /stress2_tank 61zpool create stress2_tank md$u1 md$u2 62zfs create stress2_tank/test 63set +e 64 65(cd $here/../testcases/swap; ./swap -t 2m -i 20 -l 100 -h > /dev/null) & 66file1=$mp1/file # zfs path 67sleep 20 68/tmp/zfs12 $file1 69/tmp/lsholes $file1 70s=$? 71while pkill swap; do sleep 1; done 72wait 73 74zfs umount stress2_tank/test 75zfs destroy -r stress2_tank 76zpool destroy stress2_tank 77mdconfig -d -u $u1 78mdconfig -d -u $u2 79rm -f /tmp/zfs12 /tmp/lsholes 80[ $loaded ] && kldunload zfs.ko 81exit $s 82EOF 83#include <sys/types.h> 84#include <err.h> 85#include <stdio.h> 86#include <stdlib.h> 87#include <unistd.h> 88#include <fcntl.h> 89#include <sys/mman.h> 90#include <sys/param.h> 91#include <string.h> 92#include <unistd.h> 93#include <errno.h> 94 95#define SIZ (500UL * 1024 * 1024) 96 97int 98main(int argc __unused, char *argv[]) 99{ 100 off_t hole; 101 size_t len; 102 int fd; 103 char *p, *path; 104 105 len = SIZ; 106 107 path = argv[1]; 108 if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1) 109 err(1,"open()"); 110 if (ftruncate(fd, len) == -1) 111 err(1, "ftruncate"); 112 if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 113 MAP_FAILED) { 114 if (errno == ENOMEM) 115 return (1); 116 err(1, "mmap(1)"); 117 } 118 p[1 * 1024] = 1; 119 p[2 * 1024] = 1; 120 p[4 * 1024] = 1; 121 122 if (msync(p, len, MS_SYNC | MS_INVALIDATE) == -1) 123 err(1, "msync()"); 124 125 if ((hole = lseek(fd, 0, SEEK_HOLE)) == -1) 126 err(1, "lseek(SEEK_HOLE)"); 127 if (hole != SIZ) 128 printf("--> hole = %jd, file size=%jd\n", 129 (intmax_t)hole, (intmax_t)SIZ); 130 close(fd); 131 132 return (hole == SIZ ? 0 : 1); 133} 134