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    Subject[PATCH net 5/5] qlcnic: Implement ndo_gso_check()
    Date
    ndo_gso_check() was recently introduced to allow NICs to report the
    offloading support that they have on a per-skb basis. Add an
    implementation for this driver which checks for something that looks
    like VXLAN.

    Implementation shamelessly stolen from Tom Herbert:
    http://thread.gmane.org/gmane.linux.network/332428/focus=333111

    Signed-off-by: Joe Stringer <joestringer@nicira.com>
    ---
    drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c | 12 ++++++++++++
    1 file changed, 12 insertions(+)

    diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
    index f5e29f7..6184f47 100644
    --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
    +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
    @@ -505,6 +505,17 @@ static void qlcnic_del_vxlan_port(struct net_device *netdev,
    }
    #endif

    +static bool qlcnic_gso_check(struct sk_buff *skb, struct net_device *dev)
    +{
    + if ((skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL) &&
    + (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
    + skb->inner_protocol != htons(ETH_P_TEB) ||
    + skb_inner_mac_header(skb) - skb_transport_header(skb) != 16))
    + return false;
    +
    + return true;
    +}
    +
    static const struct net_device_ops qlcnic_netdev_ops = {
    .ndo_open = qlcnic_open,
    .ndo_stop = qlcnic_close,
    @@ -537,6 +548,7 @@ static const struct net_device_ops qlcnic_netdev_ops = {
    .ndo_set_vf_vlan = qlcnic_sriov_set_vf_vlan,
    .ndo_set_vf_spoofchk = qlcnic_sriov_set_vf_spoofchk,
    #endif
    + .ndo_gso_check = qlcnic_gso_check,
    };

    static const struct net_device_ops qlcnic_netdev_failed_ops = {
    --
    1.7.10.4


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