1#!/bin/bash
  2
  3# This example script creates bonding network devices based on synthetic NIC
  4# (the virtual network adapter usually provided by Hyper-V) and the matching
  5# VF NIC (SRIOV virtual function). So the synthetic NIC and VF NIC can
  6# function as one network device, and fail over to the synthetic NIC if VF is
  7# down.
  8#
  9# Usage:
 10# - After configured vSwitch and vNIC with SRIOV, start Linux virtual
 11#   machine (VM)
 12# - Run this scripts on the VM. It will create configuration files in
 13#   distro specific directory.
 14# - Reboot the VM, so that the bonding config are enabled.
 15#
 16# The config files are DHCP by default. You may edit them if you need to change
 17# to Static IP or change other settings.
 18#
 19
 20sysdir=/sys/class/net
 21netvsc_cls={f8615163-df3e-46c5-913f-f2d2f965ed0e}
 22bondcnt=0
 23
 24# Detect Distro
 25if [ -f /etc/redhat-release ];
 26then
 27	cfgdir=/etc/sysconfig/network-scripts
 28	distro=redhat
 29elif grep -q 'Ubuntu' /etc/issue
 30then
 31	cfgdir=/etc/network
 32	distro=ubuntu
 33elif grep -q 'SUSE' /etc/issue
 34then
 35	cfgdir=/etc/sysconfig/network
 36	distro=suse
 37else
 38	echo "Unsupported Distro"
 39	exit 1
 40fi
 41
 42echo Detected Distro: $distro, or compatible
 43
 44# Get a list of ethernet names
 45list_eth=(`cd $sysdir && ls -d */ | cut -d/ -f1 | grep -v bond`)
 46eth_cnt=${#list_eth[@]}
 47
 48echo List of net devices:
 49
 50# Get the MAC addresses
 51for (( i=0; i < $eth_cnt; i++ ))
 52do
 53	list_mac[$i]=`cat $sysdir/${list_eth[$i]}/address`
 54	echo ${list_eth[$i]}, ${list_mac[$i]}
 55done
 56
 57# Find NIC with matching MAC
 58for (( i=0; i < $eth_cnt-1; i++ ))
 59do
 60	for (( j=i+1; j < $eth_cnt; j++ ))
 61	do
 62		if [ "${list_mac[$i]}" = "${list_mac[$j]}" ]
 63		then
 64			list_match[$i]=${list_eth[$j]}
 65			break
 66		fi
 67	done
 68done
 69
 70function create_eth_cfg_redhat {
 71	local fn=$cfgdir/ifcfg-$1
 72
 73	rm -f $fn
 74	echo DEVICE=$1 >>$fn
 75	echo TYPE=Ethernet >>$fn
 76	echo BOOTPROTO=none >>$fn
 77	echo UUID=`uuidgen` >>$fn
 78	echo ONBOOT=yes >>$fn
 79	echo PEERDNS=yes >>$fn
 80	echo IPV6INIT=yes >>$fn
 81	echo MASTER=$2 >>$fn
 82	echo SLAVE=yes >>$fn
 83}
 84
 85function create_eth_cfg_pri_redhat {
 86	create_eth_cfg_redhat $1 $2
 87}
 88
 89function create_bond_cfg_redhat {
 90	local fn=$cfgdir/ifcfg-$1
 91
 92	rm -f $fn
 93	echo DEVICE=$1 >>$fn
 94	echo TYPE=Bond >>$fn
 95	echo BOOTPROTO=dhcp >>$fn
 96	echo UUID=`uuidgen` >>$fn
 97	echo ONBOOT=yes >>$fn
 98	echo PEERDNS=yes >>$fn
 99	echo IPV6INIT=yes >>$fn
100	echo BONDING_MASTER=yes >>$fn
101	echo BONDING_OPTS=\"mode=active-backup miimon=100 primary=$2\" >>$fn
102}
103
104function create_eth_cfg_ubuntu {
105	local fn=$cfgdir/interfaces
106
107	echo $'\n'auto $1 >>$fn
108	echo iface $1 inet manual >>$fn
109	echo bond-master $2 >>$fn
110}
111
112function create_eth_cfg_pri_ubuntu {
113	local fn=$cfgdir/interfaces
114
115	create_eth_cfg_ubuntu $1 $2
116	echo bond-primary $1 >>$fn
117}
118
119function create_bond_cfg_ubuntu {
120	local fn=$cfgdir/interfaces
121
122	echo $'\n'auto $1 >>$fn
123	echo iface $1 inet dhcp >>$fn
124	echo bond-mode active-backup >>$fn
125	echo bond-miimon 100 >>$fn
126	echo bond-slaves none >>$fn
127}
128
129function create_eth_cfg_suse {
130        local fn=$cfgdir/ifcfg-$1
131
132        rm -f $fn
133	echo BOOTPROTO=none >>$fn
134	echo STARTMODE=auto >>$fn
135}
136
137function create_eth_cfg_pri_suse {
138	create_eth_cfg_suse $1
139}
140
141function create_bond_cfg_suse {
142	local fn=$cfgdir/ifcfg-$1
143
144	rm -f $fn
145	echo BOOTPROTO=dhcp >>$fn
146	echo STARTMODE=auto >>$fn
147	echo BONDING_MASTER=yes >>$fn
148	echo BONDING_SLAVE_0=$2 >>$fn
149	echo BONDING_SLAVE_1=$3 >>$fn
150	echo BONDING_MODULE_OPTS=\'mode=active-backup miimon=100 primary=$2\' >>$fn
151}
152
153function create_bond {
154	local bondname=bond$bondcnt
155	local primary
156	local secondary
157
158	local class_id1=`cat $sysdir/$1/device/class_id 2>/dev/null`
159	local class_id2=`cat $sysdir/$2/device/class_id 2>/dev/null`
160
161	if [ "$class_id1" = "$netvsc_cls" ]
162	then
163		primary=$2
164		secondary=$1
165	elif [ "$class_id2" = "$netvsc_cls" ]
166	then
167		primary=$1
168		secondary=$2
169	else
170		return 0
171	fi
172
173	echo $'\nBond name:' $bondname
174
175	echo configuring $primary
176	create_eth_cfg_pri_$distro $primary $bondname
177
178	echo configuring $secondary
179	create_eth_cfg_$distro $secondary $bondname
180
181	echo creating: $bondname with primary slave: $primary
182	create_bond_cfg_$distro $bondname $primary $secondary
183
184	let bondcnt=bondcnt+1
185}
186
187for (( i=0; i < $eth_cnt-1; i++ ))
188do
189        if [ -n "${list_match[$i]}" ]
190        then
191		create_bond ${list_eth[$i]} ${list_match[$i]}
192        fi
193done