[pve-devel] [RFC qemu-server 6/6] DHCP mappings on vNIC add/remove

[Stefan Lendl]

add DHCP mapping on vNIC add/update and VM clone (new mac)
remove DHCP mapping on vNIC delete and VM destroy

Signed-off-by: Stefan Lendl <s.lendl at proxmox.com>
---
 PVE/API2/Qemu.pm  | 25 +++++++++++++++++++++++++
 PVE/QemuServer.pm |  2 ++
 2 files changed, 27 insertions(+)

diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index 38bdaab..1b16fa5 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -49,6 +49,8 @@ use PVE::SSHInfo;
 use PVE::Replication;
 use PVE::StorageTunnel;
 
+use PVE::Network::SDN;
+
 BEGIN {
     if (!$ENV{PVE_GENERATING_DOCS}) {
 	require PVE::HA::Env::PVE2;
@@ -1804,6 +1806,9 @@ my $update_vm_api  = sub {
 		    }
 		    PVE::QemuConfig->add_to_pending_delete($conf, $opt, $force);
 		    PVE::QemuConfig->write_config($vmid, $conf);
+
+		    my $net = PVE::QemuServer::parse_net($conf->{$opt});
+		    PVE::Network::SDN::Dhcp::remove_mapping($net->{bridge}, $net->{macaddr});
 		} else {
 		    PVE::QemuConfig->add_to_pending_delete($conf, $opt, $force);
 		    PVE::QemuConfig->write_config($vmid, $conf);
@@ -1881,6 +1886,18 @@ my $update_vm_api  = sub {
 			);
 		    }
 		    $conf->{pending}->{$opt} = $param->{$opt};
+
+		    my $new_net = PVE::QemuServer::parse_net($param->{$opt});
+		    if (exists $conf->{$opt}) {
+			my $old_net = PVE::QemuServer::parse_net($conf->{$opt});
+			if ($old_net->{bridge} ne $new_net->{bridge} or
+			    $old_net->{macaddr} ne $new_net->{macaddr}) {
+			    print "Bridge or MAC changed: $conf->{$opt} -> $param->{$opt}\n";
+			    PVE::Network::SDN::Dhcp::remove_mapping($old_net->{bridge}, $old_net->{macaddr});
+			}
+		    }
+		    PVE::Network::SDN::Dhcp::add_mapping($vmid, $new_net->{bridge}, $new_net->{macaddr});
+
 		} else {
 		    $conf->{pending}->{$opt} = $param->{$opt};
 
@@ -3763,6 +3780,14 @@ __PACKAGE__->register_method({
 
 		PVE::QemuConfig->write_config($newid, $newconf);
 
+		foreach my $opt (keys %$newconf) {
+		    if ($opt =~ m/^net(\d+)$/) {
+			my $value = $newconf->{$opt};
+			my $net = PVE::QemuServer::parse_net($value);
+			PVE::Network::SDN::Dhcp::add_mapping($newid, $net->{bridge}, $net->{macaddr});
+		    }
+		}
+
 		if ($target) {
 		    # always deactivate volumes - avoid lvm LVs to be active on several nodes
 		    PVE::Storage::deactivate_volumes($storecfg, $vollist, $snapname) if !$running;
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 710259b..8a63ec3 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -2337,6 +2337,8 @@ sub destroy_vm {
 	});
     }
 
+    cleanup_sdn_dhcp($vmid, $conf);
+
     if (defined $replacement_conf) {
 	PVE::QemuConfig->write_config($vmid, $replacement_conf);
     } else {
-- 
2.41.0