[pve-devel] [PATCH V3 qemu-server 1/3] tap_plug: add support for bridge disable learning

[Alexandre Derumier <aderumier@odiso.com>]

This disabling mac learning && unicast flood for the tap interface

for vmstart, we don't add mac directly to fdb.
We set it latter if it's a migration or a fresh start.

for nic hotplug, we directly add mac to fdb

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
---
 PVE/QemuServer.pm             | 8 +++++++-
 vm-network-scripts/pve-bridge | 6 +++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index c706653..0114d06 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -5137,8 +5137,14 @@ sub vmconfig_update_net {
 
 		if ($have_sdn) {
 		    PVE::Network::SDN::Zones::tap_plug($iface, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
+		    PVE::Network::SDN::Zones::add_bridge_fdb($iface, $newnet->{macaddr}, $newnet->{bridge}, $newnet->{firewall});
 		} else {
-		    PVE::Network::tap_plug($iface, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
+		    my $interfaces_config = PVE::INotify::read_file('interfaces');
+		    my $bridge = $newnet->{bridge};
+		    my $opts = {};
+		    $opts->{learning} = 0 if $interfaces_config->{ifaces}->{$bridge} && $interfaces_config->{ifaces}->{$bridge}->{'bridge-disable-mac-learning'};
+		    PVE::Network::tap_plug($iface, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate}, $opts);
+		    PVE::Network::add_bridge_fdb($iface, $newnet->{macaddr}, $newnet->{firewall}) if defined($opts->{learning}) && !$opts->{learning};
 		}
 	    } elsif (safe_num_ne($oldnet->{rate}, $newnet->{rate})) {
 		# Rate can be applied on its own but any change above needs to
diff --git a/vm-network-scripts/pve-bridge b/vm-network-scripts/pve-bridge
index d37ce33..38cf2f6 100755
--- a/vm-network-scripts/pve-bridge
+++ b/vm-network-scripts/pve-bridge
@@ -47,8 +47,12 @@ if ($have_sdn) {
     PVE::Network::SDN::Zones::tap_create($iface, $net->{bridge});
     PVE::Network::SDN::Zones::tap_plug($iface, $net->{bridge}, $net->{tag}, $net->{firewall}, $net->{trunks}, $net->{rate});
 } else {
+    my $interfaces_config = PVE::INotify::read_file('interfaces');
+    my $bridge = $net->{bridge};
+    my $opts = {};
+    $opts->{learning} = 0 if $interfaces_config->{ifaces}->{$bridge} && $interfaces_config->{ifaces}->{$bridge}->{'bridge-disable-mac-learning'};
     PVE::Network::tap_create($iface, $net->{bridge});
-    PVE::Network::tap_plug($iface, $net->{bridge}, $net->{tag}, $net->{firewall}, $net->{trunks}, $net->{rate});
+    PVE::Network::tap_plug($iface, $net->{bridge}, $net->{tag}, $net->{firewall}, $net->{trunks}, $net->{rate}, $opts);
 }
 
 exit 0;
-- 
2.30.2