diff options
Diffstat (limited to 'tools/testing/selftests/net/netfilter/br_netfilter.sh')
| -rwxr-xr-x | tools/testing/selftests/net/netfilter/br_netfilter.sh | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/netfilter/br_netfilter.sh b/tools/testing/selftests/net/netfilter/br_netfilter.sh new file mode 100755 index 000000000000..c28379a965d8 --- /dev/null +++ b/tools/testing/selftests/net/netfilter/br_netfilter.sh @@ -0,0 +1,171 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test for legacy br_netfilter module combined with connection tracking, +# a combination that doesn't really work. +# Multicast/broadcast packets race for hash table insertion. + +# eth0 br0 eth0 +# setup is: ns1 <->,ns0 <-> ns3 +# ns2 <-' `'-> ns4 + +source lib.sh + +checktool "nft --version" "run test without nft tool" + +cleanup() { + cleanup_all_ns +} + +trap cleanup EXIT + +setup_ns ns0 ns1 ns2 ns3 ns4 + +ret=0 + +do_ping() +{ + fromns="$1" + dstip="$2" + + if ! ip netns exec "$fromns" ping -c 1 -q "$dstip" > /dev/null; then + echo "ERROR: ping from $fromns to $dstip" + ip netns exec "$ns0" nft list ruleset + ret=1 + fi +} + +bcast_ping() +{ + fromns="$1" + dstip="$2" + + local packets=500 + + [ "$KSFT_MACHINE_SLOW" = yes ] && packets=100 + + for i in $(seq 1 $packets); do + if ! ip netns exec "$fromns" ping -q -f -b -c 1 -q "$dstip" > /dev/null 2>&1; then + echo "ERROR: ping -b from $fromns to $dstip" + ip netns exec "$ns0" nft list ruleset + ret=1 + break + fi + done +} + +ip netns exec "$ns0" sysctl -q net.ipv4.conf.all.rp_filter=0 +ip netns exec "$ns0" sysctl -q net.ipv4.conf.default.rp_filter=0 + +if ! ip link add veth1 netns "$ns0" type veth peer name eth0 netns "$ns1"; then + echo "SKIP: Can't create veth device" + exit $ksft_skip +fi + +ip link add veth2 netns "$ns0" type veth peer name eth0 netns "$ns2" +ip link add veth3 netns "$ns0" type veth peer name eth0 netns "$ns3" +ip link add veth4 netns "$ns0" type veth peer name eth0 netns "$ns4" + +for i in $(seq 1 4); do + ip -net "$ns0" link set "veth$i" up +done + +if ! ip -net "$ns0" link add br0 type bridge stp_state 0 forward_delay 0 nf_call_iptables 1 nf_call_ip6tables 1 nf_call_arptables 1; then + echo "SKIP: Can't create bridge br0" + exit $ksft_skip +fi + +# make veth0,1,2 part of bridge. +for i in $(seq 1 3); do + ip -net "$ns0" link set "veth$i" master br0 +done + +# add a macvlan on top of the bridge. +MACVLAN_ADDR=ba:f3:13:37:42:23 +ip -net "$ns0" link add link br0 name macvlan0 type macvlan mode private +ip -net "$ns0" link set macvlan0 address ${MACVLAN_ADDR} +ip -net "$ns0" link set macvlan0 up +ip -net "$ns0" addr add 10.23.0.1/24 dev macvlan0 + +# add a macvlan on top of veth4. +MACVLAN_ADDR=ba:f3:13:37:42:24 +ip -net "$ns0" link add link veth4 name macvlan4 type macvlan mode passthru +ip -net "$ns0" link set macvlan4 address ${MACVLAN_ADDR} +ip -net "$ns0" link set macvlan4 up + +# make the macvlan part of the bridge. +# veth4 is not a bridge port, only the macvlan on top of it. +ip -net "$ns0" link set macvlan4 master br0 + +ip -net "$ns0" link set br0 up +ip -net "$ns0" addr add 10.0.0.1/24 dev br0 + +modprobe -q br_netfilter +if ! ip netns exec "$ns0" sysctl -q net.bridge.bridge-nf-call-iptables=1; then + echo "SKIP: bridge netfilter not available" + ret=$ksft_skip +fi + +# for testing, so namespaces will reply to ping -b probes. +ip netns exec "$ns0" sysctl -q net.ipv4.icmp_echo_ignore_broadcasts=0 + +# enable conntrack in ns0 and drop broadcast packets in forward to +# avoid them from getting confirmed in the postrouting hook before +# the cloned skb is passed up the stack. +ip netns exec "$ns0" nft -f - <<EOF +table ip filter { + chain input { + type filter hook input priority 1; policy accept + iifname br0 counter + ct state new accept + } +} + +table bridge filter { + chain forward { + type filter hook forward priority 0; policy accept + meta pkttype broadcast ip protocol icmp counter drop + } +} +EOF +if [ "$?" -ne 0 ];then + echo "SKIP: could not add nftables ruleset" + exit $ksft_skip +fi + +# place 1, 2 & 3 in same subnet, connected via ns0:br0. +# ns4 is placed in same subnet as well, but its not +# part of the bridge: the corresponding veth4 is not +# part of the bridge, only its macvlan interface. +for i in $(seq 1 4); do + eval ip -net \$ns"$i" link set eth0 up +done +for i in $(seq 1 2); do + eval ip -net \$ns"$i" addr add "10.0.0.1$i/24" dev eth0 +done + +ip -net "$ns3" addr add 10.23.0.13/24 dev eth0 +ip -net "$ns4" addr add 10.23.0.14/24 dev eth0 + +# test basic connectivity +do_ping "$ns1" 10.0.0.12 +do_ping "$ns3" 10.23.0.1 +do_ping "$ns4" 10.23.0.1 + +bcast_ping "$ns1" 10.0.0.255 + +# This should deliver broadcast to macvlan0, which is on top of ns0:br0. +bcast_ping "$ns3" 10.23.0.255 + +# same, this time via veth4:macvlan4. +bcast_ping "$ns4" 10.23.0.255 + +read t < /proc/sys/kernel/tainted +if [ "$t" -eq 0 ];then + echo PASS: kernel not tainted +else + echo ERROR: kernel is tainted + ret=1 +fi + +exit $ret |