vlan: Add GVRP support

Add GVRP support for dynamically registering VLANs with switches.

By default GVRP is disabled because we only support the applicant-only
participant model, which means it should not be enabled on vlans that
are members of a bridge. Since there is currently no way to cleanly
determine that, the user is responsible for enabling it.

The code is pretty small and low impact, its wrapped in a config
option though because it depends on the GARP implementation and
the STP core.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 0 deletions

diff --git a/net/8021q/Kconfig b/net/8021q/Kconfig
index c4a382e450e2..fa073a54963e 100644
--- a/net/8021q/Kconfig
+++ b/net/8021q/Kconfig
@@ -17,3 +17,13 @@ config VLAN_8021Q
           will be called 8021q.
 
           If unsure, say N.
+
+config VLAN_8021Q_GVRP
+        bool "GVRP (GARP VLAN Registration Protocol) support"
+        depends on VLAN_8021Q
+        select GARP
+        help
+          Select this to enable GVRP end-system support. GVRP is used for
+          automatic propagation of registered VLANs to switches.
+
+          If unsure, say N.