1#!/bin/sh 2 3# 4# Copyright (c) 2017 Dell EMC Isilon 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# nfs loop back mount of a tmpfs file system. 30# "[tcp] 127.0.0.1:/mnt: Permission denied" seen, when tmpfs options are 31# used. 32 33. ../default.cfg 34[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 35 36grep -q $mntpoint /etc/exports || 37 { echo "$mntpoint missing from /etc/exports"; exit 0; } 38 39s=0 40m2=${mntpoint}2 41[ -d $m2 ] || mkdir $m2 42mount | grep "on $m2 " | grep -q nfs && umount $m2 43mount | grep "on $mntpoint " | grep -q tmpfs && umount -f $mntpoint 44 45[ $# -eq 1 ] && 46 mount -t tmpfs tmpfs $mntpoint || s=1 # This works 47[ $# -eq 0 ] && 48 mount -o size=100m -t tmpfs tmpfs $mntpoint || s=1 49mount -t nfs -o tcp -o rw,retrycnt=1 127.0.0.1:$mntpoint $m2 || s=2 50 51while mount | grep "on $m2 " | grep -q nfs; do 52 umount $m2 53done 54 55while mount | grep "on $mntpoint " | grep -q tmpfs; do 56 umount $mntpoint || sleep 1 57done 58exit $s 59