Commit 2c804d0f authored Sep 30, 2014 by Eric Dumazet Committed by David S. Miller Oct 01, 2014

ipv4: mentions skb_gro_postpull_rcsum() in inet_gro_receive()



Proper CHECKSUM_COMPLETE support needs to adjust skb->csum
when we remove one header. Its done using skb_gro_postpull_rcsum()

In the case of IPv4, we know that the adjustment is not really needed,
because the checksum over IPv4 header is 0. Lets add a comment to
ease code comprehension and avoid copy/paste errors.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent eb51bbaf

net/ipv4/af_inet.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1369,6 +1369,9 @@ static struct sk_buff inet_gro_receive(struct sk_buff head,
		* immediately following this IP hdr.
		*/

		/* Note : No need to call skb_gro_postpull_rcsum() here,
		* as we already checked checksum over ipv4 header was 0
		*/
		skb_gro_pull(skb, sizeof(*iph));
		skb_set_transport_header(skb, skb_gro_offset(skb));