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selftests: netfilter: ipvs.sh: Explicity disable rp_filter on interface tunl0

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Although setup_ns() set net.ipv4.conf.default.rp_filter=0,
loading certain module such as ipip will automatically create a tunl0 interface
in all netns including new created ones. In the script, this is before than
default.rp_filter=0 applied, as a result tunl0.rp_filter remains set to 1
which causes the test report FAIL when ipip module is preloaded.

Before fix:
Testing DR mode...
Testing NAT mode...
Testing Tunnel mode...
ipvs.sh: FAIL

After fix:
Testing DR mode...
Testing NAT mode...
Testing Tunnel mode...
ipvs.sh: PASS

Fixes: 7c8b89ec50 ("selftests: netfilter: remove rp_filter configuration")
Signed-off-by: Yi Chen <yiche@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Yi Chen 2025-07-24 16:06:53 +08:00 committed by Pablo Neira Ayuso
parent 8d1c91850d
commit 8b4a1a46e8
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/net/netfilter/ipvs.sh
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@ -151,7 +151,7 @@ test_nat() {
test_tun() {
ip netns exec "${ns0}" ip route add "${vip_v4}" via "${gip_v4}" dev br0
ip netns exec "${ns1}" modprobe -q ipip
modprobe -q ipip
ip netns exec "${ns1}" ip link set tunl0 up
ip netns exec "${ns1}" sysctl -qw net.ipv4.ip_forward=0
ip netns exec "${ns1}" sysctl -qw net.ipv4.conf.all.send_redirects=0
@ -160,10 +160,10 @@ test_tun() {
ip netns exec "${ns1}" ipvsadm -a -i -t "${vip_v4}:${port}" -r ${rip_v4}:${port}
ip netns exec "${ns1}" ip addr add ${vip_v4}/32 dev lo:1
ip netns exec "${ns2}" modprobe -q ipip
ip netns exec "${ns2}" ip link set tunl0 up
ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.all.arp_ignore=1
ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.all.arp_announce=2
ip netns exec "${ns2}" sysctl -qw net.ipv4.conf.tunl0.rp_filter=0
ip netns exec "${ns2}" ip addr add "${vip_v4}/32" dev lo:1
test_service