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udp: Record gso_segs when supporting UDP segmentation offload

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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>
This commit is contained in:
Alexander Duyck 2018-05-07 11:08:22 -07:00 committed by David S. Miller
parent 53a7bdfb2a
commit dfec0ee22c
1 changed files with 2 additions and 0 deletions
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2
net/ipv4/udp.c
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@ -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_size = cork->gso_size;
skb_shinfo(skb)->gso_type = SKB_GSO_UDP_L4; 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; goto csum_partial;
} }