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net: dsa: {e}dsa: set offload_fwd_mark on received packets

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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>
This commit is contained in:
Andrew Lunn 2017-11-09 22:29:52 +01:00 committed by David S. Miller
parent a42c8e33f2
commit 13edbdb6ed
2 changed files with 4 additions and 0 deletions
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2
net/dsa/tag_dsa.c
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@ -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;
}

2
net/dsa/tag_edsa.c
View file

@ -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;
}