batman-adv: set the TAG flag for the vid passed to BLA

[ Upstream commit 4c18c425b2d228415b635e97a64737d7f27c5536 ]

When receiving or sending a packet a packet on a VLAN, the
vid has to be marked with the TAG flag in order to make any
component in batman-adv understand that the packet is coming
from a really tagged network.

This fix the Bridge Loop Avoidance behaviour which was not
able to send announces over VLAN interfaces.

Introduced by 0b1da1765fdb00ca5d53bc95c9abc70dfc9aae5b
("batman-adv: change VID semantic in the BLA code")

Signed-off-by: Antonio Quartulli <antonio@open-mesh.org>
Acked-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 0f04e1c302b4a7bf12aa4da04fc84a4d0c2a0f20..33b6144193b0bf630d2bf9531df8de04ce8eb368 100644 (file)
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -168,6 +168,7 @@ static int batadv_interface_tx(struct sk_buff *skb,
        case ETH_P_8021Q:
                vhdr = (struct vlan_ethhdr *)skb->data;
                vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
+               vid |= BATADV_VLAN_HAS_TAG;
 
                if (vhdr->h_vlan_encapsulated_proto != ethertype)
                        break;
@@ -329,6 +330,7 @@ void batadv_interface_rx(struct net_device *soft_iface,
        case ETH_P_8021Q:
                vhdr = (struct vlan_ethhdr *)skb->data;
                vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
+               vid |= BATADV_VLAN_HAS_TAG;
 
                if (vhdr->h_vlan_encapsulated_proto != ethertype)
                        break;