selftests: forwarding: Add missing 'rp_filter' configuration

When 'rp_filter' is configured in strict mode (1) the tests fail because
packets received from the macvlan netdevs would not be forwarded through
them on the reverse path.

Fix this by disabling the 'rp_filter', meaning no source validation is
performed.

Fixes: 1538812e0880 ("selftests: forwarding: Add a test for VXLAN asymmetric routing")
Fixes: 438a4f5665b2 ("selftests: forwarding: Add a test for VXLAN symmetric routing")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reported-by: Hangbin Liu <liuhangbin@gmail.com>
Tested-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20201015084525.135121-1-idosch@idosch.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh b/tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh
index a0b5f57..0727e20 100755 (executable)
--- a/tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh
+++ b/tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh
@@ -215,10 +215,16 @@ switch_create()
 
        bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 10
        bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 20
+
+       sysctl_set net.ipv4.conf.all.rp_filter 0
+       sysctl_set net.ipv4.conf.vlan10-v.rp_filter 0
+       sysctl_set net.ipv4.conf.vlan20-v.rp_filter 0
 }
 
 switch_destroy()
 {
+       sysctl_restore net.ipv4.conf.all.rp_filter
+
        bridge fdb del 00:00:5e:00:01:01 dev br1 self local vlan 20
        bridge fdb del 00:00:5e:00:01:01 dev br1 self local vlan 10
 
@@ -359,6 +365,10 @@ ns_switch_create()
 
        bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 10
        bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 20
+
+       sysctl_set net.ipv4.conf.all.rp_filter 0
+       sysctl_set net.ipv4.conf.vlan10-v.rp_filter 0
+       sysctl_set net.ipv4.conf.vlan20-v.rp_filter 0
 }
 export -f ns_switch_create
 

diff --git a/tools/testing/selftests/net/forwarding/vxlan_symmetric.sh b/tools/testing/selftests/net/forwarding/vxlan_symmetric.sh
index 1209031..5d97fa3 100755 (executable)
--- a/tools/testing/selftests/net/forwarding/vxlan_symmetric.sh
+++ b/tools/testing/selftests/net/forwarding/vxlan_symmetric.sh
@@ -237,10 +237,16 @@ switch_create()
 
        bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 10
        bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 20
+
+       sysctl_set net.ipv4.conf.all.rp_filter 0
+       sysctl_set net.ipv4.conf.vlan10-v.rp_filter 0
+       sysctl_set net.ipv4.conf.vlan20-v.rp_filter 0
 }
 
 switch_destroy()
 {
+       sysctl_restore net.ipv4.conf.all.rp_filter
+
        bridge fdb del 00:00:5e:00:01:01 dev br1 self local vlan 20
        bridge fdb del 00:00:5e:00:01:01 dev br1 self local vlan 10
 
@@ -402,6 +408,10 @@ ns_switch_create()
 
        bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 10
        bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 20
+
+       sysctl_set net.ipv4.conf.all.rp_filter 0
+       sysctl_set net.ipv4.conf.vlan10-v.rp_filter 0
+       sysctl_set net.ipv4.conf.vlan20-v.rp_filter 0
 }
 export -f ns_switch_create