@@ -1,55 +1,40 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
-# Test bridge netfilter + conntrack, a combination that doesn't really work,
-# with multicast/broadcast packets racing for hash table insertion.
+# 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
-# Kselftest framework requirement - SKIP code is 4.
-ksft_skip=4
-ret=0
-
-sfx=$(mktemp -u "XXXXXXXX")
-ns0="ns0-$sfx"
-ns1="ns1-$sfx"
-ns2="ns2-$sfx"
-ns3="ns3-$sfx"
-ns4="ns4-$sfx"
+source lib.sh
-ebtables -V > /dev/null 2>&1
+nft --version > /dev/null 2>&1
if [ $? -ne 0 ];then
- echo "SKIP: Could not run test without ebtables"
+ echo "SKIP: Could not run test without nft tool"
exit $ksft_skip
fi
-ip -Version > /dev/null 2>&1
-if [ $? -ne 0 ];then
- echo "SKIP: Could not run test without ip tool"
- exit $ksft_skip
-fi
-
-for i in $(seq 0 4); do
- eval ip netns add \$ns$i
-done
-
cleanup() {
- for i in $(seq 0 4); do eval ip netns del \$ns$i;done
+ cleanup_all_ns
}
trap cleanup EXIT
+setup_ns ns0 ns1 ns2 ns3 ns4
+
+ret=0
+
do_ping()
{
fromns="$1"
dstip="$2"
- ip netns exec $fromns ping -c 1 -q $dstip > /dev/null
- if [ $? -ne 0 ]; then
+ if ! ip netns exec "$fromns" ping -c 1 -q "$dstip" > /dev/null; then
echo "ERROR: ping from $fromns to $dstip"
- ip netns exec ${ns0} nft list ruleset
+ ip netns exec "$ns0" nft list ruleset
ret=1
fi
}
@@ -59,75 +44,75 @@ bcast_ping()
fromns="$1"
dstip="$2"
- for i in $(seq 1 1000); do
- ip netns exec $fromns ping -q -f -b -c 1 -q $dstip > /dev/null 2>&1
- if [ $? -ne 0 ]; then
+ for i in $(seq 1 500); do
+ if ! ip netns exec "$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 ${ns0} nft list ruleset
- fi
+ ip netns exec "$ns0" nft list ruleset
+ ret=1
+ break
+ fi
done
}
-ip link add veth1 netns ${ns0} type veth peer name eth0 netns ${ns1}
-if [ $? -ne 0 ]; then
+ip netns exec "$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
-
-ip -net ${ns0} link set lo up
+ip link add veth2 netns "$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
+ ip -net "$ns0" link set "veth$i" up
done
-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
-if [ $? -ne 0 ]; then
+if ! ip -net "$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
+ 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 ${ns0} addr add 10.23.0.1/24 dev macvlan0
+ip -net "$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 vepa
-ip -net ${ns0} link set macvlan4 address ${MACVLAN_ADDR}
-ip -net ${ns0} link set macvlan4 up
+ip -net "$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 macvlan4 master br0
-ip -net ${ns0} link set br0 up
-ip -net ${ns0} addr add 10.0.0.1/24 dev br0
-ip netns exec ${ns0} sysctl -q net.bridge.bridge-nf-call-iptables=1
-ret=$?
-if [ $ret -ne 0 ] ; then
+ip -net "$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 ${ns0} sysctl -q net.ipv4.icmp_echo_ignore_broadcasts=0
+ip netns exec "$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 ${ns0} nft -f - <<EOF
+ip netns exec "$ns0" nft -f - <<EOF
table ip filter {
chain input {
type filter hook input priority 1; policy accept
@@ -149,36 +134,30 @@ EOF
# 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 lo up
- eval ip -net \$ns$i link set eth0 up
+ eval ip -net \$ns"$i" link set eth0 up
done
for i in $(seq 1 2); do
- eval ip -net \$ns$i addr add 10.0.0.1$i/24 dev eth0
+ eval ip -net \$ns"$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 ${ns4} addr add 10.23.0.14/24 dev eth0
+ip -net "$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
-
-if [ $ret -eq 0 ];then
- echo "PASS: netns connectivity: ns1 can reach ns2, ns3 and ns4 can reach ns0"
-fi
+do_ping "$ns1" 10.0.0.12
+do_ping "$ns3" 10.23.0.1
+do_ping "$ns4" 10.23.0.1
-bcast_ping ${ns1} 10.0.0.255
+bcast_ping "$ns1" 10.0.0.255
# This should deliver broadcast to macvlan0, which is on top of ns0:br0.
-bcast_ping ${ns3} 10.23.0.255
+bcast_ping "$ns3" 10.23.0.255
# same, this time via veth4:macvlan4.
-bcast_ping ${ns4} 10.23.0.255
+bcast_ping "$ns4" 10.23.0.255
read t < /proc/sys/kernel/tainted
-
-if [ $t -eq 0 ];then
+if [ "$t" -eq 0 ];then
echo PASS: kernel not tainted
else
echo ERROR: kernel is tainted
Also, fix two issues reported by Pablo Neira: 1. Must modprobe br_netfilter in case its not loaded, else sysctl cannot be set. 2. ping for netns4 fails if rp_filter is enabled in bridge netns, so set all and default to 0. Signed-off-by: Florian Westphal <fw@strlen.de> --- .../selftests/net/netfilter/br_netfilter.sh | 131 ++++++++---------- 1 file changed, 55 insertions(+), 76 deletions(-)