1#!/bin/sh 2 3# 4# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 30 31# Regression test: 32 33# There is an issue, namely, when the lower file is already 34# opened r/w, but its nullfs alias is executed. This situation obviously 35# shall result in ETXTBUSY, but it currently does not. 36 37# Test scenario by kib@ 38 39. ../default.cfg 40 41mnt2=${mntpoint}2 42mount | grep -q $mnt2 && umount $mnt2 43 44[ -d $mnt2 ] || mkdir $mnt2 45mount | grep $mnt2 | grep -q /dev/md && umount -f $mnt2 46mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 47mdconfig -a -t swap -s 1g -u $mdstart 48bsdlabel -w md$mdstart auto 49newfs $newfs_flags md${mdstart}$part > /dev/null 50mount /dev/md${mdstart}$part $mntpoint 51chmod 777 $mntpoint 52 53mount -t nullfs $mntpoint $mnt2 54 55cp /bin/ls $mntpoint 56chmod +w $mntpoint/ls 57sleep 2 >> $mntpoint/ls & 58sleep .5 59# This line should cause a "/mnt2/ls: Text file busy" 60$mnt2/ls -l /bin/ls $mntpoint $mnt2 && echo FAIL || echo OK 61kill $! 62wait 63 64while mount | grep -q "$mnt2 "; do 65 umount $mnt2 || sleep 1 66done 67 68while mount | grep -q "$mntpoint "; do 69 umount $mntpoint || sleep 1 70done 71mdconfig -d -u $mdstart 72