[NET]: Added GSO toggle

This patch adds a generic segmentation offload toggle that can be turned
on/off for each net device.  For now it only supports in TCPv4.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index d10dfecb6cbd..a897f05de3b5 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1030,9 +1030,13 @@ static inline void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
 {
         __sk_dst_set(sk, dst);
         sk->sk_route_caps = dst->dev->features;
+        if (sk->sk_route_caps & NETIF_F_GSO)
+                sk->sk_route_caps |= NETIF_F_TSO;
         if (sk->sk_route_caps & NETIF_F_TSO) {
                 if (sock_flag(sk, SOCK_NO_LARGESEND) || dst->header_len)
                         sk->sk_route_caps &= ~NETIF_F_TSO;
+                else 
+                        sk->sk_route_caps |= NETIF_F_SG | NETIF_F_HW_CSUM;
         }
 }