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author | Ido Schimmel <idosch@mellanox.com> | 2019-01-21 13:22:54 +0000 |
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committer | David S. Miller <davem@davemloft.net> | 2019-01-22 20:40:35 -0800 |
commit | 4dba72fd3eef2e5a4d24e3aa943690b6d393c3c4 (patch) | |
tree | 76f73f5088083702712a26aef2ed2c8d2340a1a4 /tools/testing/selftests/net | |
parent | 438a4f5665b236f612841e2dabb1bc8e34b389c1 (diff) | |
download | linux-4dba72fd3eef2e5a4d24e3aa943690b6d393c3c4.tar.gz linux-4dba72fd3eef2e5a4d24e3aa943690b6d393c3c4.tar.bz2 linux-4dba72fd3eef2e5a4d24e3aa943690b6d393c3c4.zip |
selftests: forwarding: Add a test case for ARP suppression
ARP suppression allows the Linux bridge to answer ARP requests on behalf
of remote hosts. It reduces the amount of packets a VTEP needs to flood.
This test verifies that ARP suppression on / off works when a neighbour
exists and when it does not exist. It does so by sending an ARP request
from a host connected to one VTEP and checking whether it was received
by a second VTEP.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/net')
-rwxr-xr-x | tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh b/tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh index 909426c25585..a0b5f57d6bd3 100755 --- a/tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh +++ b/tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh @@ -94,10 +94,13 @@ ALL_TESTS=" ping_ipv4 arp_decap + arp_suppression " NUM_NETIFS=6 source lib.sh +require_command $ARPING + hx_create() { local vrf_name=$1; shift @@ -483,6 +486,77 @@ arp_decap() dev vlan20 extern_learn } +arp_suppression_compare() +{ + local expect=$1; shift + local actual=$(in_ns ns1 tc_rule_stats_get vx10 1 ingress) + + (( expect == actual )) + check_err $? "expected $expect arps got $actual" +} + +arp_suppression() +{ + ip link set dev vx10 type bridge_slave neigh_suppress on + + in_ns ns1 tc qdisc add dev vx10 clsact + in_ns ns1 tc filter add dev vx10 ingress proto arp pref 1 handle 101 \ + flower dst_mac ff:ff:ff:ff:ff:ff arp_tip 10.1.1.102 arp_op \ + request action pass + + # The neighbour is configured on the SVI and ARP suppression is on, so + # the ARP request should be suppressed + RET=0 + + $ARPING -I $h1 -fqb -c 1 -w 1 10.1.1.102 + check_err $? "arping failed" + + arp_suppression_compare 0 + + log_test "neigh_suppress: on / neigh exists: yes" + + # Delete the neighbour from the the SVI. A single ARP request should be + # received by the remote VTEP + RET=0 + + ip neigh del 10.1.1.102 dev vlan10 + + $ARPING -I $h1 -fqb -c 1 -w 1 10.1.1.102 + check_err $? "arping failed" + + arp_suppression_compare 1 + + log_test "neigh_suppress: on / neigh exists: no" + + # Turn off ARP suppression and make sure ARP is not suppressed, + # regardless of neighbour existence on the SVI + RET=0 + + ip neigh del 10.1.1.102 dev vlan10 &> /dev/null + ip link set dev vx10 type bridge_slave neigh_suppress off + + $ARPING -I $h1 -fqb -c 1 -w 1 10.1.1.102 + check_err $? "arping failed" + + arp_suppression_compare 2 + + log_test "neigh_suppress: off / neigh exists: no" + + RET=0 + + ip neigh add 10.1.1.102 lladdr $(in_ns ns1 mac_get w2) nud noarp \ + dev vlan10 extern_learn + + $ARPING -I $h1 -fqb -c 1 -w 1 10.1.1.102 + check_err $? "arping failed" + + arp_suppression_compare 3 + + log_test "neigh_suppress: off / neigh exists: yes" + + in_ns ns1 tc qdisc del dev vx10 clsact +} + trap cleanup EXIT setup_prepare |