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: Eric 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: David S. Miller <davem@davemloft.net>
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)) {