vxlan: Add support for UDP checksums (v4 sending, v6 zero csums)

Added VXLAN link configuration for sending UDP checksums, and allowing
TX and RX of UDP6 checksums.

Also, call common iptunnel_handle_offloads and added GSO support for
checksums.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 14 insertions, 1 deletions

diff --git a/include/net/vxlan.h b/include/net/vxlan.h
index 7bb4084b1bd0..12196ce661d9 100644
--- a/include/net/vxlan.h
+++ b/include/net/vxlan.h
@@ -24,9 +24,19 @@ struct vxlan_sock {
         struct udp_offload udp_offloads;
 };
 
+#define VXLAN_F_LEARN                   0x01
+#define VXLAN_F_PROXY                   0x02
+#define VXLAN_F_RSC                     0x04
+#define VXLAN_F_L2MISS                  0x08
+#define VXLAN_F_L3MISS                  0x10
+#define VXLAN_F_IPV6                    0x20
+#define VXLAN_F_UDP_CSUM                0x40
+#define VXLAN_F_UDP_ZERO_CSUM6_TX       0x80
+#define VXLAN_F_UDP_ZERO_CSUM6_RX       0x100
+
 struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
                                   vxlan_rcv_t *rcv, void *data,
-                                  bool no_share, bool ipv6);
+                                  bool no_share, u32 flags);
 
 void vxlan_sock_release(struct vxlan_sock *vs);
 
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 622e7910b8cc..b38534895db5 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -319,6 +319,9 @@ enum {
         IFLA_VXLAN_PORT,        /* destination port */
         IFLA_VXLAN_GROUP6,
         IFLA_VXLAN_LOCAL6,
+        IFLA_VXLAN_UDP_CSUM,
+        IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
+        IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
         __IFLA_VXLAN_MAX
 };
 #define IFLA_VXLAN_MAX  (__IFLA_VXLAN_MAX - 1)