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add virtio host_mtu feature.

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This add a new "mtu" param to vm nic,
and force the mtu in the guest for virtio nic only.

Special value: 1 = set the same value than the bridge
This commit is contained in:
Alexandre Derumier 2020-04-17 07:47:20 +02:00 committed by Thomas Lamprecht
parent 55fb78aa4a
commit 61a14cde8d
1 changed files with 19 additions and 0 deletions
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19
PVE/QemuServer.pm
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@ -884,6 +884,12 @@ my $net_fmt = {
description => 'Whether this interface should be disconnected (like pulling the plug).', description => 'Whether this interface should be disconnected (like pulling the plug).',
optional => 1, optional => 1,
}, },
mtu => {
type => 'integer',
minimum => 1, maximum => 65520,
description => 'Force mtu (virtio only). 1 = bridge mtu value',
optional => 1,
},
}; };
my $netdesc = { my $netdesc = {
@ -1593,6 +1599,19 @@ sub print_netdevice_full {
} }
$tmpstr .= ",bootindex=$net->{bootindex}" if $net->{bootindex} ; $tmpstr .= ",bootindex=$net->{bootindex}" if $net->{bootindex} ;
if($net->{model} eq 'virtio' && $net->{mtu} && $net->{bridge}) {
my $mtu = $net->{mtu};
my $bridge_mtu = PVE::Network::read_bridge_mtu($net->{bridge});
if($mtu == 1) {
$mtu = $bridge_mtu;
} else {
die "mtu $mtu is bigger than bridge mtu $bridge_mtu" if $mtu > $bridge_mtu;
}
$tmpstr .= ",host_mtu=$mtu";
}
if ($use_old_bios_files) { if ($use_old_bios_files) {
my $romfile; my $romfile;
if ($device eq 'virtio-net-pci') { if ($device eq 'virtio-net-pci') {