netdev - [PATCH 06/10] batman-adv: warn if added interface is part of a bridge

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Message-Id: <1329463110-856-7-git-send-email-lindner_marek@yahoo.de>
Date:	Fri, 17 Feb 2012 15:18:26 +0800
From:	Marek Lindner <lindner_marek@...oo.de>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
	Marek Lindner <lindner_marek@...oo.de>
Subject: [PATCH 06/10] batman-adv: warn if added interface is part of a bridge

Signed-off-by: Marek Lindner <lindner_marek@...oo.de>
---
 net/batman-adv/hard-interface.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index d3e0e32..68b667c 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -281,6 +281,14 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
 	if (!atomic_inc_not_zero(&hard_iface->refcount))
 		goto out;
 
+	/* hard-interface is part of a bridge */
+	if (hard_iface->net_dev->priv_flags & IFF_BRIDGE_PORT)
+		pr_err("You are about to enable batman-adv on '%s' which "
+		       "already is part of a bridge. Unless you know exactly "
+		       "what you are doing this is probably wrong and won't "
+		       "work the way you think it would.\n",
+		       hard_iface->net_dev->name);
+
 	soft_iface = dev_get_by_name(&init_net, iface_name);
 
 	if (!soft_iface) {
-- 
1.7.9

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