[ovs-dev] [PATCH ovn] ovn-northd: Add localnet ports to Multicast_Groups created by IGMP_Group.
Dumitru Ceara
dceara at redhat.com
Thu Oct 8 13:48:07 UTC 2020
In case a logical switch is a "bridged logical switch", i.e., it has a
localnet port, add the localnet port to all multicast groups generated
from IGMP_Groups. This is needed because multicast packets are never
tunneled between hypervisors.
Note: There still exists an issue regarding IP Multicast Relay (routing)
when traffic is received on bridged logical switches connected to
logical routers with mcast_relay=true. That issue is not addressed
yet but an item is added to TODO.rst to track it.
Reported-at: https://bugzilla.redhat.com/1886103
Fixes: 5d1527b11e94 ("ovn-northd: Add IGMP Relay support")
Signed-off-by: Dumitru Ceara <dceara at redhat.com>
---
TODO.rst | 8 ++++++++
northd/ovn-northd.c | 7 +++++++
tests/ovn.at | 40 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 55 insertions(+)
diff --git a/TODO.rst b/TODO.rst
index 4321630..c158155 100644
--- a/TODO.rst
+++ b/TODO.rst
@@ -152,3 +152,11 @@ OVN To-do List
<Logical_Datapath.tunnel_key_NB-Port_Group.name>. This causes an additional
hashtable lookup in parse_port_group() which can be avoided when we are sure
that the Southbound DB uses the new format.
+
+* IP Multicast Relay
+
+ * When connecting bridged logical switches (localnet) to logical routers
+ with IP Multicast Relay enabled packets might get duplicated. We need
+ to find a way of determining if routing has already been executed (on a
+ different hypervisor) for the IP multicast packet being processed locally
+ in the router pipeline.
diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
index afc9b4e..8bab9b0 100644
--- a/northd/ovn-northd.c
+++ b/northd/ovn-northd.c
@@ -4134,6 +4134,13 @@ ovn_igmp_group_aggregate_ports(struct ovn_igmp_group *igmp_group,
ovn_igmp_group_destroy_entry(entry);
free(entry);
}
+
+ if (igmp_group->datapath->n_localnet_ports) {
+ ovn_multicast_add_ports(mcast_groups, igmp_group->datapath,
+ &igmp_group->mcgroup,
+ igmp_group->datapath->localnet_ports,
+ igmp_group->datapath->n_localnet_ports);
+ }
}
static void
diff --git a/tests/ovn.at b/tests/ovn.at
index 08395fd..e3f3153 100644
--- a/tests/ovn.at
+++ b/tests/ovn.at
@@ -16668,6 +16668,7 @@ ovn_start
# - subnet 30.0.0.0/8
# - 1 port bound on hv1 (sw3-p1)
# - 1 port bound on hv2 (sw3-p2)
+# - 1 localnet port (sw3-ln)
reset_pcap_file() {
local iface=$1
@@ -16794,6 +16795,9 @@ ovn-nbctl lsp-add sw2 sw2-p1
ovn-nbctl lsp-add sw2 sw2-p2
ovn-nbctl lsp-add sw3 sw3-p1
ovn-nbctl lsp-add sw3 sw3-p2
+ovn-nbctl lsp-add sw3 sw3-ln \
+ -- lsp-set-type sw3-ln localnet \
+ -- lsp-set-options sw3-ln network_name=phys
ovn-nbctl lr-add rtr
ovn-nbctl lrp-add rtr rtr-sw1 00:00:00:00:01:00 10.0.0.254/24
@@ -16838,6 +16842,7 @@ ovs-vsctl -- add-port br-int hv1-vif4 -- \
options:tx_pcap=hv1/vif4-tx.pcap \
options:rxq_pcap=hv1/vif4-rx.pcap \
ofport-request=1
+ovs-vsctl set open . external-ids:ovn-bridge-mappings=phys:br-phys
sim_add hv2
as hv2
@@ -16863,6 +16868,7 @@ ovs-vsctl -- add-port br-int hv2-vif4 -- \
options:tx_pcap=hv2/vif4-tx.pcap \
options:rxq_pcap=hv2/vif4-rx.pcap \
ofport-request=1
+ovs-vsctl set open . external-ids:ovn-bridge-mappings=phys:br-phys
OVN_POPULATE_ARP
@@ -17146,6 +17152,18 @@ store_ip_multicast_pkt \
$(ip_to_hex 10 0 0 42) $(ip_to_hex 239 0 1 68) 1e 20 ca70 11 \
e518e518000a3b3a0000 expected_switched
+# TODO: IGMP Relay duplicates IP multicast packets in some conditions, for
+# more details see TODO.rst, section "IP Multicast Relay". Once that issue is
+# fixed the duplicated packets should not appear anymore.
+store_ip_multicast_pkt \
+ 000000000100 01005e000144 \
+ $(ip_to_hex 10 0 0 42) $(ip_to_hex 239 0 1 68) 1e 1f cb70 11 \
+ e518e518000a3b3a0000 expected_routed_sw1
+store_ip_multicast_pkt \
+ 000000000200 01005e000144 \
+ $(ip_to_hex 10 0 0 42) $(ip_to_hex 239 0 1 68) 1e 1f cb70 11 \
+ e518e518000a3b3a0000 expected_routed_sw2
+
OVN_CHECK_PACKETS([hv1/vif1-tx.pcap], [expected_routed_sw1])
OVN_CHECK_PACKETS([hv2/vif3-tx.pcap], [expected_routed_sw2])
OVN_CHECK_PACKETS([hv1/vif4-tx.pcap], [expected_switched])
@@ -17293,6 +17311,7 @@ ovn_start
# - subnet 30::/64
# - 1 port bound on hv1 (sw3-p1)
# - 1 port bound on hv2 (sw3-p2)
+# - 1 localnet port (sw3-ln)
reset_pcap_file() {
local iface=$1
@@ -17418,6 +17437,9 @@ ovn-nbctl lsp-add sw2 sw2-p1
ovn-nbctl lsp-add sw2 sw2-p2
ovn-nbctl lsp-add sw3 sw3-p1
ovn-nbctl lsp-add sw3 sw3-p2
+ovn-nbctl lsp-add sw3 sw3-ln \
+ -- lsp-set-type sw3-ln localnet \
+ -- lsp-set-options sw3-ln network_name=phys
ovn-nbctl lr-add rtr
ovn-nbctl lrp-add rtr rtr-sw1 00:00:00:00:01:00 10::fe/64
@@ -17477,6 +17499,7 @@ ovs-vsctl -- add-port br-int hv1-vif4 -- \
options:tx_pcap=hv1/vif4-tx.pcap \
options:rxq_pcap=hv1/vif4-rx.pcap \
ofport-request=1
+ovs-vsctl set open . external-ids:ovn-bridge-mappings=phys:br-phys
sim_add hv2
as hv2
@@ -17502,6 +17525,7 @@ ovs-vsctl -- add-port br-int hv2-vif4 -- \
options:tx_pcap=hv2/vif4-tx.pcap \
options:rxq_pcap=hv2/vif4-rx.pcap \
ofport-request=1
+ovs-vsctl set open . external-ids:ovn-bridge-mappings=phys:br-phys
OVN_POPULATE_ARP
@@ -17812,6 +17836,22 @@ store_ip_multicast_pkt \
93407a69000e1b5e61736461640a \
expected_switched
+# TODO: MLD Relay duplicates IP multicast packets in some conditions, for
+# more details see TODO.rst, section "IP Multicast Relay". Once that issue is
+# fixed the duplicated packets should not appear anymore.
+store_ip_multicast_pkt \
+ 000000000100 333300000001 \
+ 10000000000000000000000000000042 ff0adeadbeef00000000000000000001 \
+ 000e 01 11 \
+ 93407a69000e1b5e61736461640a \
+ expected_routed_sw1
+store_ip_multicast_pkt \
+ 000000000200 333300000001 \
+ 10000000000000000000000000000042 ff0adeadbeef00000000000000000001 \
+ 000e 01 11 \
+ 93407a69000e1b5e61736461640a \
+ expected_routed_sw2
+
OVN_CHECK_PACKETS([hv1/vif1-tx.pcap], [expected_routed_sw1])
OVN_CHECK_PACKETS([hv2/vif3-tx.pcap], [expected_routed_sw2])
OVN_CHECK_PACKETS([hv1/vif4-tx.pcap], [expected_switched])
--
1.8.3.1
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