linux-kernel - [PATCH 3.18 089/121] vxlan: dont migrate permanent fdb entries during learn

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Date:   Wed, 11 Apr 2018 20:36:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Roopa Prabhu <roopa@...ulusnetworks.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 3.18 089/121] vxlan: dont migrate permanent fdb entries during learn

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

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

From: Roopa Prabhu <roopa@...ulusnetworks.com>


[ Upstream commit e0090a9e979de5202c7d16c635dea2f005221073 ]

This patch fixes vxlan_snoop to not move permanent fdb entries
on learn events. This is consistent with the bridge fdb
handling of permanent entries.

Fixes: 26a41ae60438 ("vxlan: only migrate dynamic FDB entries")
Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/vxlan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -985,7 +985,7 @@ static bool vxlan_snoop(struct net_devic
 			return false;
 
 		/* Don't migrate static entries, drop packets */
-		if (f->state & NUD_NOARP)
+		if (f->state & (NUD_PERMANENT | NUD_NOARP))
 			return true;
 
 		if (net_ratelimit())