tcp: md5: add tcp_md5_needed jump label

[sfrench/cifs-2.6.git] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 3b522259da7d5a54d7d3730ddd8d8c9ef24313e1..0681afc62354c6693e316ae66cb7e72a1cb8bd0a 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1555,9 +1555,21 @@ struct tcp_md5sig_key *tcp_v4_md5_lookup(const struct sock *sk,
                                         const struct sock *addr_sk);
 
 #ifdef CONFIG_TCP_MD5SIG
-struct tcp_md5sig_key *tcp_md5_do_lookup(const struct sock *sk,
-                                        const union tcp_md5_addr *addr,
-                                        int family);
+#include <linux/jump_label.h>
+extern struct static_key tcp_md5_needed;
+struct tcp_md5sig_key *__tcp_md5_do_lookup(const struct sock *sk,
+                                          const union tcp_md5_addr *addr,
+                                          int family);
+static inline struct tcp_md5sig_key *
+tcp_md5_do_lookup(const struct sock *sk,
+                 const union tcp_md5_addr *addr,
+                 int family)
+{
+       if (!static_key_false(&tcp_md5_needed))
+               return NULL;
+       return __tcp_md5_do_lookup(sk, addr, family);
+}
+
 #define tcp_twsk_md5_key(twsk) ((twsk)->tw_md5_key)
 #else
 static inline struct tcp_md5sig_key *tcp_md5_do_lookup(const struct sock *sk,