Commit 70e939dd authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: add skb_get_dsfield() helper 



skb_get_dsfield(skb) gets dsfield from skb, or -1
if an error was found.

This is basically a wrapper around ipv4_get_dsfield()
and ipv6_get_dsfield().

Used by following patch for fq_codel.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
Cc: Tom Henderson <tomh@tomh.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 19757ceb

include/net/inet_ecn.h

+17 −0
Original line number Diff line number Diff line
@@ -188,6 +188,23 @@ static inline int INET_ECN_set_ce(struct sk_buff *skb) 
	return 0;

}



static inline int skb_get_dsfield(struct sk_buff *skb)

{

	switch (skb_protocol(skb, true)) {

	case cpu_to_be16(ETH_P_IP):

		if (!pskb_network_may_pull(skb, sizeof(struct iphdr)))

			break;

		return ipv4_get_dsfield(ip_hdr(skb));



	case cpu_to_be16(ETH_P_IPV6):

		if (!pskb_network_may_pull(skb, sizeof(struct ipv6hdr)))

			break;

		return ipv6_get_dsfield(ipv6_hdr(skb));

	}



	return -1;

}



static inline int INET_ECN_set_ect1(struct sk_buff *skb)

{

	switch (skb_protocol(skb, true)) {