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#!/bin/bash
# Copyright David Ashern and Sridhar K. N. Rao
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# L2FWD configuration
BPFFS=/sys/fs/bpf
BPFTOOL=/usr/sbin/bpftool
# MAC ADDRESSES - Ex: Of Traffic-Generator Ports
TGENEASTMAC=12:41:da:80:1f:71
TGENWESTMAC=12:30:6d:9f:6f:42
# Interfaces
EAST=ens0f0
WEST=ens0f1
# Index of Interfaces
EASTINDEX=1
EASTINDEX=2
################################################################################
#
pr_msg()
{
echo -e "\e[34m$*\e[00m"
}
run_cmd()
{
local cmd="$*"
echo
echo -e "\e[31m${cmd}\e[00m"
sudo $cmd
}
show_maps()
{
echo
echo -e "\e[31m${BPFTOOL} map sh\e[00m"
sudo ${BPFTOOL} map sh | \
awk 'BEGIN { skip = 0 } {
if (skip) {
skip--
} else if ($2 == "lpm_trie") {
skip = 1
} else {
print
}
}'
}
show_progs()
{
echo
echo -e "\e[31m${BPFTOOL} prog sh\e[00m"
sudo ${BPFTOOL} prog sh | \
awk 'BEGIN { skip = 0 } {
if (skip) {
skip--
} else if ($2 == "cgroup_skb") {
skip = 2
} else {
print
}
}'
}
show_status()
{
show_maps
show_progs
run_cmd ${BPFTOOL} net sh
}
do_reset()
{
sudo rm -rf ${BPFFS}/map
sudo rm -rf ${BPFFS}/prog
sudo mkdir ${BPFFS}/map
sudo mkdir ${BPFFS}/prog
for d in eth0 eth1
do
sudo ${BPFTOOL} net detach xdp dev ${d}
sudo ethtool -K ${d} hw-tc-offload on
sudo ethtool -K ${d} rxvlan off
done
}
################################################################################
# start
do_reset >/dev/null 2>&1
echo
pr_msg "Create ports map"
pr_msg "- global map used for bulking redirected packets"
run_cmd ${BPFTOOL} map create ${BPFFS}/map/xdp_fwd_ports \
type devmap_hash key 4 value 8 entries 512 name xdp_fwd_ports
echo
pr_msg "Add entries to the egress port map for EAST and WEST Interfaces"
run_cmd ${BPFTOOL} map update pinned ${BPFFS}/map/xdp_fwd_ports \
key hex ${EASTINDEX} 0 0 0 value hex ${EASTINDEX} 0 0 0 0 0 0 0
run_cmd ${BPFTOOL} map update pinned ${BPFFS}/map/xdp_fwd_ports \
key hex ${WESTINDEX} 0 0 0 value hex ${WESTINDEX} 0 0 0 0 0 0 0
echo
pr_msg "load l2fwd program and attach to eth0 and eth1"
run_cmd ${BPFTOOL} prog load ../ksrc/obj/xdp_l2fwd.o ${BPFFS}/prog/xdp_l2fwd \
map name xdp_fwd_ports name xdp_fwd_ports
run_cmd ${BPFTOOL} net attach xdp pinned ${BPFFS}/prog/xdp_l2fwd dev ${EAST}
run_cmd ${BPFTOOL} net attach xdp pinned ${BPFFS}/prog/xdp_l2fwd dev ${WEST}
echo
pr_msg "Add FDB and port map entries for this"
run_cmd ../usrc/bin/xdp_l2fwd -s ${TGENEASTMAC} -m ${TGENWESTMAC} -d eth1
run_cmd ../usrc/bin/xdp_l2fwd -s ${TGENWESTMAC} -m ${TGENEASTMAC} -d eth1
run_cmd ../usrc/bin/xdp_l2fwd -P
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