Messages in this thread Patch in this message | | | From | Joe Stringer <> | Subject | [PATCHv2 net] i40e: Implement ndo_gso_check() | Date | Thu, 20 Nov 2014 15:11:21 -0800 |
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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 IPIP, GRE, UDP tunnels.
Signed-off-by: Joe Stringer <joestringer@nicira.com> --- v2: Expand to include IP in IP and IPv4/IPv6 inside GRE/UDP tunnels. Add MAX_INNER_LENGTH (as 80). --- drivers/net/ethernet/intel/i40e/i40e_main.c | 31 +++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index c3a7f4a..2b01c8d 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -7447,6 +7447,36 @@ static int i40e_ndo_fdb_dump(struct sk_buff *skb, #endif /* USE_DEFAULT_FDB_DEL_DUMP */ #endif /* HAVE_FDB_OPS */ +static bool i40e_gso_check(struct sk_buff *skb, struct net_device *dev) +{ + if ((skb_shinfo(skb)->gso_type & SKB_GSO_IPIP) && + (skb->inner_protocol_type != ENCAP_TYPE_IPPROTO || + skb->inner_protocol != htons(IPPROTO_IPIP))) { + return false; + } + + if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE | SKB_GSO_UDP_TUNNEL)) { + unsigned char *ihdr; + + if (skb->inner_protocol_type != ENCAP_TYPE_ETHER) + return false; + + if (skb->inner_protocol == htons(ETH_P_TEB)) + ihdr = skb_inner_mac_header(skb); + else if (skb->inner_protocol == htons(ETH_P_IP) || + skb->inner_protocol == htons(ETH_P_IPV6)) + ihdr = skb_inner_network_header(skb); + else + return false; + +#define MAX_TUNNEL_HDR_LEN 80 + if (ihdr - skb_transport_header(skb) > MAX_TUNNEL_HDR_LEN) + return false; + } + + return true; +} + static const struct net_device_ops i40e_netdev_ops = { .ndo_open = i40e_open, .ndo_stop = i40e_close, @@ -7487,6 +7517,7 @@ static const struct net_device_ops i40e_netdev_ops = { .ndo_fdb_dump = i40e_ndo_fdb_dump, #endif #endif + .ndo_gso_check = i40e_gso_check, }; /** -- 1.7.10.4
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