diff options
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 0d87e11e7f1d..8c0a0908875d 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -1170,9 +1170,26 @@ static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) } } - /* don't change skb->dev for link-local packets */ - if (is_link_local_ether_addr(eth_hdr(skb)->h_dest)) + /* Link-local multicast packets should be passed to the + * stack on the link they arrive as well as pass them to the + * bond-master device. These packets are mostly usable when + * stack receives it with the link on which they arrive + * (e.g. LLDP) they also must be available on master. Some of + * the use cases include (but are not limited to): LLDP agents + * that must be able to operate both on enslaved interfaces as + * well as on bonds themselves; linux bridges that must be able + * to process/pass BPDUs from attached bonds when any kind of + * STP version is enabled on the network. + */ + if (is_link_local_ether_addr(eth_hdr(skb)->h_dest)) { + struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC); + + if (nskb) { + nskb->dev = bond->dev; + netif_rx(nskb); + } return RX_HANDLER_PASS; + } if (bond_should_deliver_exact_match(skb, slave, bond)) return RX_HANDLER_EXACT; |