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authorHerbert Xu <herbert@gondor.apana.org.au>2006-06-30 16:37:03 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-30 17:12:10 -0400
commitf83ef8c0b58dac17211a4c0b6df0e2b1bd6637b1 (patch)
tree61661a587df97cb2a9f73b5d0d1cf30f09644051 /net/ipv4/ip_output.c
parentbcd76111178ebccedd46a9b3eaff65c78e5a70af (diff)
[IPV6]: Added GSO support for TCPv6
This patch adds GSO support for IPv6 and TCPv6. This is based on a patch by Ananda Raju <Ananda.Raju@neterion.com>. His original description is: This patch enables TSO over IPv6. Currently Linux network stacks restricts TSO over IPv6 by clearing of the NETIF_F_TSO bit from "dev->features". This patch will remove this restriction. This patch will introduce a new flag NETIF_F_TSO6 which will be used to check whether device supports TSO over IPv6. If device support TSO over IPv6 then we don't clear of NETIF_F_TSO and which will make the TCP layer to create TSO packets. Any device supporting TSO over IPv6 will set NETIF_F_TSO6 flag in "dev->features" along with NETIF_F_TSO. In case when user disables TSO using ethtool, NETIF_F_TSO will get cleared from "dev->features". So even if we have NETIF_F_TSO6 we don't get TSO packets created by TCP layer. SKB_GSO_TCPV4 renamed to SKB_GSO_TCP to make it generic GSO packet. SKB_GSO_UDPV4 renamed to SKB_GSO_UDP as UFO is not a IPv4 feature. UFO is supported over IPv6 also The following table shows there is significant improvement in throughput with normal frames and CPU usage for both normal and jumbo. -------------------------------------------------- | | 1500 | 9600 | | ------------------|-------------------| | | thru CPU | thru CPU | -------------------------------------------------- | TSO OFF | 2.00 5.5% id | 5.66 20.0% id | -------------------------------------------------- | TSO ON | 2.63 78.0 id | 5.67 39.0% id | -------------------------------------------------- Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_output.c')
-rw-r--r--net/ipv4/ip_output.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 7624fd1d8f9f..243d2a763363 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -744,7 +744,7 @@ static inline int ip_ufo_append_data(struct sock *sk,
744 if (!err) { 744 if (!err) {
745 /* specify the length of each IP datagram fragment*/ 745 /* specify the length of each IP datagram fragment*/
746 skb_shinfo(skb)->gso_size = mtu - fragheaderlen; 746 skb_shinfo(skb)->gso_size = mtu - fragheaderlen;
747 skb_shinfo(skb)->gso_type = SKB_GSO_UDPV4; 747 skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
748 __skb_queue_tail(&sk->sk_write_queue, skb); 748 __skb_queue_tail(&sk->sk_write_queue, skb);
749 749
750 return 0; 750 return 0;
@@ -1089,7 +1089,7 @@ ssize_t ip_append_page(struct sock *sk, struct page *page,
1089 if ((sk->sk_protocol == IPPROTO_UDP) && 1089 if ((sk->sk_protocol == IPPROTO_UDP) &&
1090 (rt->u.dst.dev->features & NETIF_F_UFO)) { 1090 (rt->u.dst.dev->features & NETIF_F_UFO)) {
1091 skb_shinfo(skb)->gso_size = mtu - fragheaderlen; 1091 skb_shinfo(skb)->gso_size = mtu - fragheaderlen;
1092 skb_shinfo(skb)->gso_type = SKB_GSO_UDPV4; 1092 skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
1093 } 1093 }
1094 1094
1095 1095