tcp/dccp: constify rtx_synack() and friends

This is done to make sure we do not change listener socket
while sending SYNACK packets while socket lock is not held.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index 87935ca..ff7ce1e 100644 (file)
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -32,7 +32,7 @@ struct request_sock_ops {
        int             obj_size;
        struct kmem_cache       *slab;
        char            *slab_name;
-       int             (*rtx_syn_ack)(struct sock *sk,
+       int             (*rtx_syn_ack)(const struct sock *sk,
                                       struct request_sock *req);
        void            (*send_ack)(struct sock *sk, struct sk_buff *skb,
                                    struct request_sock *req);

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 868c535..6630ab1 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1676,7 +1676,7 @@ int tcp4_proc_init(void);
 void tcp4_proc_exit(void);
 #endif
 
-int tcp_rtx_synack(struct sock *sk, struct request_sock *req);
+int tcp_rtx_synack(const struct sock *sk, struct request_sock *req);
 int tcp_conn_request(struct request_sock_ops *rsk_ops,
                     const struct tcp_request_sock_ops *af_ops,
                     struct sock *sk, struct sk_buff *skb);

diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index ccf4c56..a46ae9c 100644 (file)
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -498,7 +498,7 @@ static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk,
        return &rt->dst;
 }
 
-static int dccp_v4_send_response(struct sock *sk, struct request_sock *req)
+static int dccp_v4_send_response(const struct sock *sk, struct request_sock *req)
 {
        int err = -1;
        struct sk_buff *skb;

diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 5165571..4fa199d 100644 (file)
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -181,7 +181,7 @@ out:
 }
 
 
-static int dccp_v6_send_response(struct sock *sk, struct request_sock *req)
+static int dccp_v6_send_response(const struct sock *sk, struct request_sock *req)
 {
        struct inet_request_sock *ireq = inet_rsk(req);
        struct ipv6_pinfo *np = inet6_sk(sk);

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 9eb67a8..53ce6cf 100644 (file)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -3502,7 +3502,7 @@ void tcp_send_probe0(struct sock *sk)
                                  TCP_RTO_MAX);
 }
 
-int tcp_rtx_synack(struct sock *sk, struct request_sock *req)
+int tcp_rtx_synack(const struct sock *sk, struct request_sock *req)
 {
        const struct tcp_request_sock_ops *af_ops = tcp_rsk(req)->af_specific;
        struct flowi fl;