Merge branch 'GREoIPV6-followups'

Alexander Duyck says:

====================
Follow-ups for GUEoIPv6 patches

This patch series is meant to be applied after:
[PATCH v7 net-next 00/16] ipv6: Enable GUEoIPv6 and more fixes for v6 tunneling

The first patch addresses an issue we already resolved in the GREv4 and is
now present in GREv6 with the introduction of FOU/GUE for IPv6 based GRE
tunnels.

The second patch goes through and enables IPv6 tunnel offloads for the Intel
NICs that already support the IPv4 based IP-in-IP tunnel offloads.  I have
only done a bit of touch testing but have seen ~20 Gb/s over an i40e
interface using a v4-in-v6 tunnel, and I have verified IPv6 GRE is still
passing traffic at around the same rate.  I plan to do further testing but
with these patches present it should enable a wider audience to be able to
test the new features introduced in Tom's patchset with hardware offloads.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -9084,6 +9084,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
 				   NETIF_F_GSO_GRE		|
 				   NETIF_F_GSO_GRE_CSUM		|
 				   NETIF_F_GSO_IPXIP4		|
+				   NETIF_F_GSO_IPXIP6		|
 				   NETIF_F_GSO_UDP_TUNNEL	|
 				   NETIF_F_GSO_UDP_TUNNEL_CSUM	|
 				   NETIF_F_GSO_PARTIAL		|

drivers/net/ethernet/intel/i40e/i40e_txrx.c

@@ -2285,6 +2285,7 @@ static int i40e_tso(struct sk_buff *skb, u8 *hdr_len, u64 *cd_type_cmd_tso_mss)
 	if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 					 SKB_GSO_GRE_CSUM |
 					 SKB_GSO_IPXIP4 |
+					 SKB_GSO_IPXIP6 |
 					 SKB_GSO_UDP_TUNNEL |
 					 SKB_GSO_UDP_TUNNEL_CSUM)) {
 		if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&

drivers/net/ethernet/intel/i40evf/i40e_txrx.c

@@ -1560,6 +1560,7 @@ static int i40e_tso(struct sk_buff *skb, u8 *hdr_len, u64 *cd_type_cmd_tso_mss)
 	if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 					 SKB_GSO_GRE_CSUM |
 					 SKB_GSO_IPXIP4 |
+					 SKB_GSO_IPXIP6 |
 					 SKB_GSO_UDP_TUNNEL |
 					 SKB_GSO_UDP_TUNNEL_CSUM)) {
 		if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&

drivers/net/ethernet/intel/i40evf/i40evf_main.c

@@ -2231,6 +2231,7 @@ int i40evf_process_config(struct i40evf_adapter *adapter)
 				   NETIF_F_GSO_GRE		|
 				   NETIF_F_GSO_GRE_CSUM		|
 				   NETIF_F_GSO_IPXIP4		|
+				   NETIF_F_GSO_IPXIP6		|
 				   NETIF_F_GSO_UDP_TUNNEL	|
 				   NETIF_F_GSO_UDP_TUNNEL_CSUM	|
 				   NETIF_F_GSO_PARTIAL		|

drivers/net/ethernet/intel/igb/igb_main.c

@@ -2419,6 +2419,7 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #define IGB_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
 				  NETIF_F_GSO_GRE_CSUM | \
 				  NETIF_F_GSO_IPXIP4 | \
+				  NETIF_F_GSO_IPXIP6 | \
 				  NETIF_F_GSO_UDP_TUNNEL | \
 				  NETIF_F_GSO_UDP_TUNNEL_CSUM)
 

drivers/net/ethernet/intel/igbvf/netdev.c

@@ -2764,6 +2764,7 @@ static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
 				    NETIF_F_GSO_GRE_CSUM | \
 				    NETIF_F_GSO_IPXIP4 | \
+				    NETIF_F_GSO_IPXIP6 | \
 				    NETIF_F_GSO_UDP_TUNNEL | \
 				    NETIF_F_GSO_UDP_TUNNEL_CSUM)
 

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -9483,6 +9483,7 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #define IXGBE_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
 				    NETIF_F_GSO_GRE_CSUM | \
 				    NETIF_F_GSO_IPXIP4 | \
+				    NETIF_F_GSO_IPXIP6 | \
 				    NETIF_F_GSO_UDP_TUNNEL | \
 				    NETIF_F_GSO_UDP_TUNNEL_CSUM)
 

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

@@ -4063,6 +4063,7 @@ static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
 				      NETIF_F_GSO_GRE_CSUM | \
 				      NETIF_F_GSO_IPXIP4 | \
+				      NETIF_F_GSO_IPXIP6 | \
 				      NETIF_F_GSO_UDP_TUNNEL | \
 				      NETIF_F_GSO_UDP_TUNNEL_CSUM)
 

net/ipv6/ip6_gre.c

@@ -1355,11 +1355,15 @@ static int ip6gre_newlink(struct net *src_net, struct net_device *dev,
 	dev->hw_features	|= GRE6_FEATURES;
 
 	if (!(nt->parms.o_flags & TUNNEL_SEQ)) {
-		/* TCP segmentation offload is not supported when we
-		 * generate output sequences.
+		/* TCP offload with GRE SEQ is not supported, nor
+		 * can we support 2 levels of outer headers requiring
+		 * an update.
 		 */
-		dev->features    |= NETIF_F_GSO_SOFTWARE;
-		dev->hw_features |= NETIF_F_GSO_SOFTWARE;
+		if (!(nt->parms.o_flags & TUNNEL_CSUM) ||
+		    (nt->encap.type == TUNNEL_ENCAP_NONE)) {
+			dev->features    |= NETIF_F_GSO_SOFTWARE;
+			dev->hw_features |= NETIF_F_GSO_SOFTWARE;
+		}
 
 		/* Can use a lockless transmit, unless we generate
 		 * output sequences