Commit 76eeb12b authored Feb 18, 2020 by Heiner Kallweit Committed by David S. Miller Feb 19, 2020

net: core: add helper tcp_v6_gso_csum_prep



Several network drivers for chips that support TSO6 share the same code
for preparing the TCP header, so let's factor it out to a helper.
A difference is that some drivers reset the payload_len whilst others
don't do this. This value is overwritten by TSO anyway, therefore
the new helper resets it in general.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 9cb8e048

include/net/ip6_checksum.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -76,6 +76,15 @@ static inline void __tcp_v6_send_check(struct sk_buff *skb,
		}
		}

		static inline void tcp_v6_gso_csum_prep(struct sk_buff *skb)
		{
		struct ipv6hdr *ipv6h = ipv6_hdr(skb);
		struct tcphdr *th = tcp_hdr(skb);

		ipv6h->payload_len = 0;
		th->check = ~tcp_v6_check(0, &ipv6h->saddr, &ipv6h->daddr, 0);
		}

		#if IS_ENABLED(CONFIG_IPV6)
		static inline void tcp_v6_send_check(struct sock sk, struct sk_buff skb)
		{

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