> On 24 May 2022, at 00:15, Dumitru Ceara <[email protected]> wrote:
>
> On 5/3/22 17:15, Alin-Gabriel Serdean wrote:
>> Add localnet ports to their corresponding southbound multicast group.
>>
>> Update unit tests.
>>
>> Reported-at: https://github.com/ovn-org/ovn/issues/125
>> Reported-by: Diko Parvanov <[email protected]>
>> Suggested-by: Dumitru Ceara <[email protected]>
>> Signed-off-by: Alin-Gabriel Serdean <[email protected]>
>> ---
>
> Hi Alin,
>
> Thanks for the patch!
Hi Dumitru,
Thanks for the review!
>
>> northd/northd.c | 17 ++++++++++-------
>> tests/ovn.at | 15 ++-------------
>> 2 files changed, 12 insertions(+), 20 deletions(-)
>>
>> diff --git a/northd/northd.c b/northd/northd.c
>> index a56666297..4441ef631 100644
>> --- a/northd/northd.c
>> +++ b/northd/northd.c
>> @@ -4591,13 +4591,6 @@ 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
>> @@ -15066,6 +15059,16 @@ build_mcast_groups(struct lflow_input *input_data,
>>
>> /* Add the extracted ports to the IGMP group. */
>> ovn_igmp_group_add_entry(igmp_group, igmp_ports, n_igmp_ports);
>> + if (!ovn_igmp_group_allocate_id(igmp_group)) {
>> + ovn_igmp_group_destroy(igmp_groups, igmp_group);
>> + continue;
>> + }
>> + 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);
>> + }
>
> I'm not sure I understand how this changes things. After looking at the
> main branch code more closely, we already include all localnet ports in
> the multicast_group generated for an IGMP group. We just do it at the
> end of build_mcast_groups(), in ovn_igmp_group_aggregate_ports() which
> is called once for every IGMP Group learnt in a logical datapath.
Indeed I got confused between branches and I didn’t saw the
ovn_igmp_group_aggregate_ports.
>> }
>>
>> /* Build IGMP groups for multicast routers with relay enabled. The router
>> diff --git a/tests/ovn.at b/tests/ovn.at
>> index 34b6abfc0..5440639a8 100644
>> --- a/tests/ovn.at
>> +++ b/tests/ovn.at
>> @@ -19570,7 +19570,8 @@ 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
>> + -- lsp-set-options sw3-ln network_name=phys \
>> + -- lsp-set-options sw3-ln mcast_flood=true
>
> This threw me off track for a bit.. "lsp-set-options <port> <options>"
> will actually overwrite all options of <port> with <options>. Which
> most likely is not what we want here because we would be removing the
> network_name, essentially disconnecting the localnet port.
>
> If I understand the intention correctly, you should probably use:
>
> -- lsp-set-options sw3-ln network_name=phys mcast_flood=true
You are correct. This actually made me think I was changing things.
>
>>
>> ovn-nbctl lr-add rtr
>> ovn-nbctl lrp-add rtr rtr-sw1 00:00:00:00:01:00 10.0.0.254/24
>> @@ -19985,18 +19986,6 @@ 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
>> -
>
> After changing the test to properly set mcast_flood=true on the localnet
> port, it starts failing due to the duplicated routed packets (the TODO
> above). There was no logical change in northd.c as far as I can tell,
> so that makes sense.
>
>> OVS_WAIT_UNTIL(
>> [check_packets 'hv1/vif1-tx.pcap expected_routed_sw1' \
>> 'hv2/vif3-tx.pcap expected_routed_sw2' \
>
> Then I tried to replicate the issue Diko reported but I couldn't. The
> databases attached to the GitHub issue are truncated, I get:
>
> ovsdb-tool: syntax error: ovnnb_db.db: 731669 bytes starting at offset
> 62 have SHA-1 hash 161c2831d154dce19aeb316b5d95de5db66988ac but should
> have hash 0d9bc5cb94dcce9f58bb99c5588b249b551c27cd
>
> And I tried setting up a unit test to do exactly what is reported in the
> GitHub issue but regardless of mcast_flood value I always get multicast
> traffic generated from an "internal" source properly forwarded to the
> "external" subscribers that I created and attached to the provider
> network simulated in the test.
>
> Diko, do you still have an environment where you hit this issue? Would
> it be possible to share the NB/SB database files again, making sure
> they're not truncated?
FWIW I think the problem with the database is that it’s a 20.03 version of the
schema.
After looking a bit over relevant IGMP fixes I think we are missing this commit
on our end:
https://patchwork.ozlabs.org/project/ovn/patch/[email protected]/
Sorry for the noise with the patch.
>
> Thanks,
> Dumitru
>
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