From ee80d1ebe5ba7f4bd74959c873119175a4fc08d3 Mon Sep 17 00:00:00 2001 From: Willem de Bruijn Date: Thu, 26 Apr 2018 13:42:16 -0400 Subject: udp: add udp gso Implement generic segmentation offload support for udp datagrams. A follow-up patch adds support to the protocol stack to generate such packets. UDP GSO is not UFO. UFO fragments a single large datagram. GSO splits a large payload into a number of discrete UDP datagrams. The implementation adds a GSO type SKB_UDP_GSO_L4 to differentiate it from UFO (SKB_UDP_GSO). IPPROTO_UDPLITE is excluded, as that protocol has no gso handler registered. [ Export __udp_gso_segment for ipv6. -DaveM ] Signed-off-by: Willem de Bruijn Signed-off-by: David S. Miller --- net/core/skbuff.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/core/skbuff.c') diff --git a/net/core/skbuff.c b/net/core/skbuff.c index ff49e35..c647cfe 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -4940,6 +4940,8 @@ static unsigned int skb_gso_transport_seglen(const struct sk_buff *skb) thlen = tcp_hdrlen(skb); } else if (unlikely(skb_is_gso_sctp(skb))) { thlen = sizeof(struct sctphdr); + } else if (shinfo->gso_type & SKB_GSO_UDP_L4) { + thlen = sizeof(struct udphdr); } /* UFO sets gso_size to the size of the fragmentation * payload, i.e. the size of the L4 (UDP) header is already -- cgit v1.1