diff options
Diffstat (limited to 'drivers/net/ethernet/ibm/ibmveth.c')
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmveth.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c index c5be4ebd8437..84121aab7ff1 100644 --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -1011,6 +1011,29 @@ static int ibmveth_send(struct ibmveth_adapter *adapter, return 0; } +static int ibmveth_is_packet_unsupported(struct sk_buff *skb, + struct net_device *netdev) +{ + struct ethhdr *ether_header; + int ret = 0; + + ether_header = eth_hdr(skb); + + if (ether_addr_equal(ether_header->h_dest, netdev->dev_addr)) { + netdev_dbg(netdev, "veth doesn't support loopback packets, dropping packet.\n"); + netdev->stats.tx_dropped++; + ret = -EOPNOTSUPP; + } + + if (!ether_addr_equal(ether_header->h_source, netdev->dev_addr)) { + netdev_dbg(netdev, "source packet MAC address does not match veth device's, dropping packet.\n"); + netdev->stats.tx_dropped++; + ret = -EOPNOTSUPP; + } + + return ret; +} + static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) { @@ -1022,6 +1045,9 @@ static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, dma_addr_t dma_addr; unsigned long mss = 0; + if (ibmveth_is_packet_unsupported(skb, netdev)) + goto out; + /* veth doesn't handle frag_list, so linearize the skb. * When GRO is enabled SKB's can have frag_list. */ |