Commit dfec0ee2 authored May 07, 2018 by Alexander Duyck Committed by David S. Miller May 08, 2018

udp: Record gso_segs when supporting UDP segmentation offload



We need to record the number of segments that will be generated when this
frame is segmented. The expectation is that if gso_size is set then
gso_segs is set as well. Without this some drivers such as ixgbe get
confused if they attempt to offload this as they record 0 segments for the
entire packet instead of the correct value.

Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 53a7bdfb

net/ipv4/udp.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -793,6 +793,8 @@ static int udp_send_skb(struct sk_buff skb, struct flowi4 fl4,

		skb_shinfo(skb)->gso_size = cork->gso_size;
		skb_shinfo(skb)->gso_type = SKB_GSO_UDP_L4;
		skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(len - sizeof(uh),
		cork->gso_size);
		goto csum_partial;
		}

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