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#!/bin/bash
# Copyright (c) 2016 Red Hat, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Author: Lin Li <lilin@redhat.com>
path=$(pwd)
source ../include/utils.sh || exit 1
source ../include/include.sh || exit 1
source ../include/tc.sh || exit 1
source ../include/mpath.sh || exit 1
source ../include/scsi_debug.sh || exit 1
#this script usually is only used by current case
#private global variables, lower case and no under line is okay
mpath=
function _isconfig (){
[ -z $mpath ] && return 2
Cmd "multipath -ll $mpath"
}
function _init (){
#will improve this function
#should return the multipathed disk created by scsi_debug, don't consider the other mutipathed disks
#olnly append the black list exception to /etc/multipath.conf not override
Setup_Multipath || Fail "failed to create multipathed device via scsi_debug"
mpath=$RETURN_STR
_isconfig
}
function _destroy (){
sleep 10
Cmd "multipath -F"
sleep 5
Cmd "modprobe -r scsi_debug"
}
# ---------------------------------------------------------#
# Print_kernel_info()
# Usage:
# print the detail running kernel information.
# Parameter: # NULL
# Returns:
# Return code:
# 0 on success
# 1 if something went wrong.
# ---------------------------------------------------------#
function Print_kernel_info (){
Cmd "lsb_release -a"
Cmd "uname -a"
}
# ---------------------------------------------------------#
# Setup_Multipath ()
# Usage:
# return mpath_name if we have multipath devices, if not,
# we use scsi_debug to create a multipath device.
# Parameter:
# NULL
# Returns:
# Return code:
# 0 on success
# 1 if something went wrong.
# Return string:
# RETURN_STR # $mpath_name_list, like "mpath0 mpath1"
# ---------------------------------------------------------#
function Setup_Multipath (){
RETURN_STR=''
local mpath_name_list=$(dmsetup table \
| perl -ne 'print "$1 " if /(mpath[a-z0-9]+):[0-9 ]+multipath.*/')
if [ "CHK${mpath_name_list}" != "CHK" ];then
mpath_name_list="$(echo ${mpath_name_list} | sed -e 's/ $//')"
echo "INFO: Found multipath devices: ${mpath_name_list}"
#RHEL 5 will disable some wwn mpath if we install OS with ondisk=mapper/mpath0
# option, so we need to enable them all
if [ "CHK$(uname -r | egrep "2\.6\.18.*el5")" != "CHK" ];then
cat << AA > /etc/multipath.conf
defaults {
user_friendly_names yes
}
blacklist {
device {
vendor .*
product .*
}
}
blacklist_exceptions {
device {
vendor Linux
product scsi_debug
}
device {
vendor IQSTOR
product .*
}
device {
vendor NETAPP
product .*
}
device {
vendor HITACHI
product .*
}
}
AA
service multipathd start
sleep 5s #multipathd return premature
multipath -r
multipathd -k'reconfigure'
mpath_name_list=$(dmsetup table \
| perl -ne 'print "$1 " if /(mpath[a-z0-9]+):[0-9 ]+multipath.*/')
fi
if [ "CHK${mpath_name_list}" == "CHK" ];then
echo -n "FATAL: still no mulipath devices setup,"
echo " check code in Setup_Multipath()"
RETURN_STR=''
return 1
fi
RETURN_STR="${mpath_name_list}"
return 0
fi
#setup scsi_debug
echo "INFO: Loading scsi_debug module for simulation of mpath"
local dev_size=100
if [ "CHK$(uname -m)" == "CHKi386" ] \
|| [ "CHK$(uname -m)" == "CHKi686" ]; then
#i386 platform cannot allocate 100 MiB in kernel space
dev_size=10
fi
modprobe scsi_debug dev_size_mb=${dev_size} \
num_tgts=1 vpd_use_hostno=0 \
add_host=4 delay=20 \
max_luns=2 no_lun_0=1 2>&1 1>/dev/null
echo "INFO: Waiting for udev to create /dev/sdX"
sleep 15s #wait for udev to create /dev/sdX
rpm -q device-mapper-multipath 2>/dev/null 1>/dev/null
if [ $? -ne 0 ];then
echo "INFO: Installing device-mapper-multipath via yum"
yum -y install device-mapper-multipath
fi
#enable multipath for scsi_debug.
cat << AA > /etc/multipath.conf
defaults {
#Enable multibus is for mutlbus testing
path_grouping_policy multibus
user_friendly_names yes
}
blacklist {
device {
vendor .*
product .*
}
}
blacklist_exceptions {
device {
vendor Linux
product scsi_debug
}
}
AA
echo "INFO: /etc/multipath.conf updated"
cat /etc/multipath.conf
echo "INFO: Restarting multiapth and reload configuration"
service multipathd restart
sleep 5s #multipathd return premature
multipathd -k'reconfig'
mpath_name_list=$(dmsetup table | perl -ne 'print "$1 " if /(mpath[a-z0-9]+):[0-9 ]+multipath.*/')
if [ "CHK${mpath_name_list}" != "CHK" ];then
mpath_name_list="$(echo ${mpath_name_list} | sed -e 's/ $//')"
echo "INFO: found mpath: ${mpath_name_list}"
RETURN_STR="${mpath_name_list}"
return 0
fi
return 1
} #end of functoin Setup_Multipath
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