linux-kernel - [ 030/135] batman-adv: set the TAG flag for the vid passed to BLA

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Message-Id: <20131011193948.500218367@linuxfoundation.org>
Date:	Fri, 11 Oct 2013 12:38:31 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Antonio Quartulli <antonio@...n-mesh.org>,
	Simon Wunderlich <siwu@....tu-chemnitz.de>,
	Marek Lindner <mareklindner@...mailbox.ch>
Subject: [ 030/135] batman-adv: set the TAG flag for the vid passed to BLA

3.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Antonio Quartulli <antonio@...n-mesh.com>

[ 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@...n-mesh.org>
Acked-by: Simon Wunderlich <siwu@....tu-chemnitz.de>
Signed-off-by: Marek Lindner <mareklindner@...mailbox.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/batman-adv/soft-interface.c |    2 ++
 1 file changed, 2 insertions(+)

--- 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
 	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_devi
 	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;


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