tcp: cookie_v4_init_sequence: skb should be const

Octavian Purdila · davem330 · commit 57b47553f65e · 2014-06-27T15:53:35.000-07:00
Signed-off-by: Octavian Purdila &lt;octavian.purdila@intel.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/include/net/tcp.h b/include/net/tcp.h
@@ -493,10 +493,11 @@ static inline u32 tcp_cookie_time(void)
 
 u32 __cookie_v4_init_sequence(const struct iphdr *iph, const struct tcphdr *th,
 			      u16 *mssp);
-__u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mss);
+__u32 cookie_v4_init_sequence(struct sock *sk, const struct sk_buff *skb,
+			      __u16 *mss);
 #else
 static inline __u32 cookie_v4_init_sequence(struct sock *sk,
-					    struct sk_buff *skb,
+					    const struct sk_buff *skb,
 					    __u16 *mss)
 {
 	return 0;
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
@@ -170,7 +170,8 @@ u32 __cookie_v4_init_sequence(const struct iphdr *iph, const struct tcphdr *th,
 }
 EXPORT_SYMBOL_GPL(__cookie_v4_init_sequence);
 
-__u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
+__u32 cookie_v4_init_sequence(struct sock *sk, const struct sk_buff *skb,
+			      __u16 *mssp)
 {
 	const struct iphdr *iph = ip_hdr(skb);
 	const struct tcphdr *th = tcp_hdr(skb);

Original file line number	Diff line number	Diff line change
`@@ -170,7 +170,8 @@ u32 __cookie_v4_init_sequence(const struct iphdr iph, const struct tcphdr th,`
`170`	`170`	`}`
`171`	`171`	`EXPORT_SYMBOL_GPL(__cookie_v4_init_sequence);`
`172`	`172`
`173`		`-__u32 cookie_v4_init_sequence(struct sock sk, struct sk_buff skb, __u16 *mssp)`
	`173`	`+__u32 cookie_v4_init_sequence(struct sock sk, const struct sk_buff skb,`
	`174`	`+ __u16 *mssp)`
`174`	`175`	`{`
`175`	`176`	`const struct iphdr *iph = ip_hdr(skb);`
`176`	`177`	`const struct tcphdr *th = tcp_hdr(skb);`