From 13edbdb6ed8b829ab3198a8c7b978c37184317b5 Mon Sep 17 00:00:00 2001
From: Andrew Lunn <andrew@lunn.ch>
Date: Thu, 9 Nov 2017 22:29:52 +0100
Subject: [PATCH] net: dsa: {e}dsa: set offload_fwd_mark on received packets
The software bridge needs to know if a packet has already been bridged
by hardware offload to ports in the same hardware offload, in order
that it does not re-flood them, causing duplicates. This is
particularly true for broadcast and multicast traffic which the host
has requested.
By setting offload_fwd_mark in the skb the bridge will only flood to
ports in other offloads and other netifs. Set this flag in the DSA and
EDSA tag driver.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/dsa/tag_dsa.c | 2 ++
net/dsa/tag_edsa.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c
index dbbcdafed8c30..cd13cfc542cef 100644
--- a/net/dsa/tag_dsa.c
+++ b/net/dsa/tag_dsa.c
@@ -141,6 +141,8 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev,
2 * ETH_ALEN);
}
+ skb->offload_fwd_mark = 1;
+
return skb;
}
diff --git a/net/dsa/tag_edsa.c b/net/dsa/tag_edsa.c
index f38a626b3a055..4083326b806e8 100644
--- a/net/dsa/tag_edsa.c
+++ b/net/dsa/tag_edsa.c
@@ -160,6 +160,8 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev,
2 * ETH_ALEN);
}
+ skb->offload_fwd_mark = 1;
+
return skb;
}
--
2.30.2