[PATCH net-next v26 04/23] ovpn: keep carrier always on for MP interfaces

[Antonio Quartulli]

An ovpn interface configured in MP mode will keep carrier always
on and let the user decide when to bring it administratively up and
down.

This way a MP node (i.e. a server) will keep its interface always
up and running, even when no peer is connected.

Signed-off-by: Antonio Quartulli <anto...@openvpn.net>
---
 drivers/net/ovpn/main.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ovpn/main.c b/drivers/net/ovpn/main.c
index 
ea7dad374c0088cab46282c61cd8fef65bab0d5c..fa1dd84be24060d6dc749dc9e097f166a7adea26
 100644
--- a/drivers/net/ovpn/main.c
+++ b/drivers/net/ovpn/main.c
@@ -93,10 +93,18 @@ static int ovpn_newlink(struct net_device *dev,
        ovpn->dev = dev;
        ovpn->mode = mode;
 
-       /* turn carrier explicitly off after registration, this way state is
-        * clearly defined
+       /* Set carrier explicitly after registration, this way state is
+        * clearly defined.
+        *
+        * In case of MP interfaces we keep the carrier always on.
+        *
+        * Carrier for P2P interfaces is initially off and it is then
+        * switched on and off when the remote peer is added or deleted.
         */
-       netif_carrier_off(dev);
+       if (ovpn->mode == OVPN_MODE_MP)
+               netif_carrier_on(dev);
+       else
+               netif_carrier_off(dev);
 
        return register_netdevice(dev);
 }

-- 
2.49.0