tcp: md5: add more const attributes

Now tcp_md5_hash_header() has a const tcphdr argument, we can add more
const attributes to callers.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 8 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 910cc29f9e97..ed0e81452827 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1185,8 +1185,9 @@ struct tcp_md5sig_pool {
 
 /* - functions */
 extern int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
-                               struct sock *sk, struct request_sock *req,
-                               struct sk_buff *skb);
+                               const struct sock *sk,
+                               const struct request_sock *req,
+                               const struct sk_buff *skb);
 extern struct tcp_md5sig_key * tcp_v4_md5_lookup(struct sock *sk,
                                                  struct sock *addr_sk);
 extern int tcp_v4_md5_do_add(struct sock *sk, __be32 addr, u8 *newkey,
@@ -1448,9 +1449,9 @@ struct tcp_sock_af_ops {
                                                 struct sock *addr_sk);
         int                     (*calc_md5_hash) (char *location,
                                                   struct tcp_md5sig_key *md5,
-                                                  struct sock *sk,
-                                                  struct request_sock *req,
-                                                  struct sk_buff *skb);
+                                                  const struct sock *sk,
+                                                  const struct request_sock *req,
+                                                  const struct sk_buff *skb);
         int                     (*md5_add) (struct sock *sk,
                                             struct sock *addr_sk,
                                             u8 *newkey,
@@ -1467,9 +1468,9 @@ struct tcp_request_sock_ops {
                                                 struct request_sock *req);
         int                     (*calc_md5_hash) (char *location,
                                                   struct tcp_md5sig_key *md5,
-                                                  struct sock *sk,
-                                                  struct request_sock *req,
-                                                  struct sk_buff *skb);
+                                                  const struct sock *sk,
+                                                  const struct request_sock *req,
+                                                  const struct sk_buff *skb);
 #endif
 };