[pve-devel] [PATCH pve-common V2] Inotify: fix mtu check

[Alexandre Derumier]

changelog: bond with ifupdown2 is working like ifupdown

- special check for bond, set parent mtu from slaves mtu if no defined.

- error if parent mtu is lower than child mtu (not bigger)

- child inherit from parent mtu if not defined

- fix vlan check (parent/child was inverted)
---
 src/PVE/INotify.pm | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/PVE/INotify.pm b/src/PVE/INotify.pm
index 4cf8699..5d87261 100644
--- a/src/PVE/INotify.pm
+++ b/src/PVE/INotify.pm
@@ -759,11 +759,15 @@ my $check_mtu = sub {
     die "check mtu - missing parent interface\n" if !$parent;
     die "check mtu - missing child interface\n" if !$child;
 
+    if($ifaces->{$parent}->{type} eq 'bond') {
+	$ifaces->{$parent}->{mtu} = $ifaces->{$child}->{mtu} if (!$ifaces->{$parent}->{mtu} && $ifaces->{$child}->{mtu});
+    }
+
     my $pmtu = $ifaces->{$parent}->{mtu} ? $ifaces->{$parent}->{mtu} : 1500;
-    my $cmtu = $ifaces->{$child}->{mtu} ? $ifaces->{$child}->{mtu} : 1500;
+    my $cmtu = $ifaces->{$child}->{mtu} ? $ifaces->{$child}->{mtu} : $pmtu;
 
-    die "interface '$parent' - mtu $pmtu is bigger than '$child' - mtu $cmtu\n"
-	if $pmtu > $cmtu;
+    die "interface '$parent' - mtu $pmtu is lower than '$child' - mtu $cmtu\n"
+	if $pmtu < $cmtu;
 };
 
 # config => {
@@ -1393,7 +1397,7 @@ sub __write_etc_network_interfaces {
 		die "vlan '$iface' - wrong interface type on parent '$p' " .
 		    "('$n->{type}' != 'eth|bond|bridge' )\n";
 	    }
-	    &$check_mtu($ifaces, $iface, $p);
+	    &$check_mtu($ifaces, $p, $iface);
 	}
     }
 
-- 
2.11.0