tools: hv: Add a script to help bonding synthetic and VF NICs

This script helps to create bonding network devices based on synthetic NIC
(the virtual network adapter usually provided by Hyper-V) and the matching
VF NIC (SRIOV virtual function). So the synthetic NIC and VF NIC can
function as one network device, and fail over to the synthetic NIC if VF is
down.

Mayjor distros (RHEL, Ubuntu, SLES) supported by Hyper-V are supported by
this script.
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

tools/hv/bondvf.sh

+#!/bin/bash
+
+# This example script creates bonding network devices based on synthetic NIC
+# (the virtual network adapter usually provided by Hyper-V) and the matching
+# VF NIC (SRIOV virtual function). So the synthetic NIC and VF NIC can
+# function as one network device, and fail over to the synthetic NIC if VF is
+# down.
+#
+# Usage:
+# - After configured vSwitch and vNIC with SRIOV, start Linux virtual
+#   machine (VM)
+# - Run this scripts on the VM. It will create configuration files in
+#   distro specific directory.
+# - Reboot the VM, so that the bonding config are enabled.
+#
+# The config files are DHCP by default. You may edit them if you need to change
+# to Static IP or change other settings.
+#
+
+sysdir=/sys/class/net
+netvsc_cls={f8615163-df3e-46c5-913f-f2d2f965ed0e}
+bondcnt=0
+
+# Detect Distro
+if [ -f /etc/redhat-release ];
+then
+	cfgdir=/etc/sysconfig/network-scripts
+	distro=redhat
+elif grep -q 'Ubuntu' /etc/issue
+then
+	cfgdir=/etc/network
+	distro=ubuntu
+elif grep -q 'SUSE' /etc/issue
+then
+	cfgdir=/etc/sysconfig/network
+	distro=suse
+else
+	echo "Unsupported Distro"
+	exit 1
+fi
+
+echo Detected Distro: $distro, or compatible
+
+# Get a list of ethernet names
+list_eth=(`cd $sysdir && ls -d */ | cut -d/ -f1 | grep -v bond`)
+eth_cnt=${#list_eth[@]}
+
+echo List of net devices:
+
+# Get the MAC addresses
+for (( i=0; i < $eth_cnt; i++ ))
+do
+	list_mac[$i]=`cat $sysdir/${list_eth[$i]}/address`
+	echo ${list_eth[$i]}, ${list_mac[$i]}
+done
+
+# Find NIC with matching MAC
+for (( i=0; i < $eth_cnt-1; i++ ))
+do
+	for (( j=i+1; j < $eth_cnt; j++ ))
+	do
+		if [ "${list_mac[$i]}" = "${list_mac[$j]}" ]
+		then
+			list_match[$i]=${list_eth[$j]}
+			break
+		fi
+	done
+done
+
+function create_eth_cfg_redhat {
+	local fn=$cfgdir/ifcfg-$1
+
+	rm -f $fn
+	echo DEVICE=$1 >>$fn
+	echo TYPE=Ethernet >>$fn
+	echo BOOTPROTO=none >>$fn
+	echo ONBOOT=yes >>$fn
+	echo NM_CONTROLLED=no >>$fn
+	echo PEERDNS=yes >>$fn
+	echo IPV6INIT=yes >>$fn
+	echo MASTER=$2 >>$fn
+	echo SLAVE=yes >>$fn
+}
+
+function create_eth_cfg_pri_redhat {
+	create_eth_cfg_redhat $1 $2
+}
+
+function create_bond_cfg_redhat {
+	local fn=$cfgdir/ifcfg-$1
+
+	rm -f $fn
+	echo DEVICE=$1 >>$fn
+	echo TYPE=Bond >>$fn
+	echo BOOTPROTO=dhcp >>$fn
+	echo ONBOOT=yes >>$fn
+	echo NM_CONTROLLED=no >>$fn
+	echo PEERDNS=yes >>$fn
+	echo IPV6INIT=yes >>$fn
+	echo BONDING_MASTER=yes >>$fn
+	echo BONDING_OPTS=\"mode=active-backup miimon=100 primary=$2\" >>$fn
+}
+
+function create_eth_cfg_ubuntu {
+	local fn=$cfgdir/interfaces
+
+	echo $'\n'auto $1 >>$fn
+	echo iface $1 inet manual >>$fn
+	echo bond-master $2 >>$fn
+}
+
+function create_eth_cfg_pri_ubuntu {
+	local fn=$cfgdir/interfaces
+
+	create_eth_cfg_ubuntu $1 $2
+	echo bond-primary $1 >>$fn
+}
+
+function create_bond_cfg_ubuntu {
+	local fn=$cfgdir/interfaces
+
+	echo $'\n'auto $1 >>$fn
+	echo iface $1 inet dhcp >>$fn
+	echo bond-mode active-backup >>$fn
+	echo bond-miimon 100 >>$fn
+	echo bond-slaves none >>$fn
+}
+
+function create_eth_cfg_suse {
+        local fn=$cfgdir/ifcfg-$1
+
+        rm -f $fn
+	echo BOOTPROTO=none >>$fn
+	echo STARTMODE=auto >>$fn
+}
+
+function create_eth_cfg_pri_suse {
+	create_eth_cfg_suse $1
+}
+
+function create_bond_cfg_suse {
+	local fn=$cfgdir/ifcfg-$1
+
+	rm -f $fn
+	echo BOOTPROTO=dhcp >>$fn
+	echo STARTMODE=auto >>$fn
+	echo BONDING_MASTER=yes >>$fn
+	echo BONDING_SLAVE_0=$2 >>$fn
+	echo BONDING_SLAVE_1=$3 >>$fn
+	echo BONDING_MODULE_OPTS=\'mode=active-backup miimon=100 primary=$2\' >>$fn
+}
+
+function create_bond {
+	local bondname=bond$bondcnt
+	local primary
+	local secondary
+
+	local class_id1=`cat $sysdir/$1/device/class_id 2>/dev/null`
+	local class_id2=`cat $sysdir/$2/device/class_id 2>/dev/null`
+
+	if [ "$class_id1" = "$netvsc_cls" ]
+	then
+		primary=$2
+		secondary=$1
+	elif [ "$class_id2" = "$netvsc_cls" ]
+	then
+		primary=$1
+		secondary=$2
+	else
+		return 0
+	fi
+
+	echo $'\nBond name:' $bondname
+
+	echo configuring $primary
+	create_eth_cfg_pri_$distro $primary $bondname
+
+	echo configuring $secondary
+	create_eth_cfg_$distro $secondary $bondname
+
+	echo creating: $bondname with primary slave: $primary
+	create_bond_cfg_$distro $bondname $primary $secondary
+
+	let bondcnt=bondcnt+1
+}
+
+for (( i=0; i < $eth_cnt-1; i++ ))
+do
+        if [ -n "${list_match[$i]}" ]
+        then
+		create_bond ${list_eth[$i]} ${list_match[$i]}
+        fi
+done