inet: makes syn_ack_timeout mandatory

There are two struct request_sock_ops providers, tcp and dccp.

inet_csk_reqsk_queue_prune() can avoid testing syn_ack_timeout being
NULL if we make it non NULL like syn_ack_timeout

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Cc: dccp@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/dccp.h b/include/linux/dccp.h
index eaf95a0..d16294e 100644 (file)
--- a/include/linux/dccp.h
+++ b/include/linux/dccp.h
@@ -549,6 +549,8 @@ static inline const char *dccp_role(const struct sock *sk)
        return NULL;
 }
 
+extern void dccp_syn_ack_timeout(struct sock *sk, struct request_sock *req);
+
 #endif /* __KERNEL__ */
 
 #endif /* _LINUX_DCCP_H */

diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index caf6e17..07f5579 100644 (file)
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -574,6 +574,11 @@ static void dccp_v4_reqsk_destructor(struct request_sock *req)
        kfree(inet_rsk(req)->opt);
 }
 
+void dccp_syn_ack_timeout(struct sock *sk, struct request_sock *req)
+{
+}
+EXPORT_SYMBOL(dccp_syn_ack_timeout);
+
 static struct request_sock_ops dccp_request_sock_ops __read_mostly = {
        .family         = PF_INET,
        .obj_size       = sizeof(struct dccp_request_sock),
@@ -581,6 +586,7 @@ static struct request_sock_ops dccp_request_sock_ops __read_mostly = {
        .send_ack       = dccp_reqsk_send_ack,
        .destructor     = dccp_v4_reqsk_destructor,
        .send_reset     = dccp_v4_ctl_send_reset,
+       .syn_ack_timeout = dccp_syn_ack_timeout,
 };
 
 int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)

diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 4dc588f..e923ac9 100644 (file)
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -343,6 +343,7 @@ static struct request_sock_ops dccp6_request_sock_ops = {
        .send_ack       = dccp_reqsk_send_ack,
        .destructor     = dccp_v6_reqsk_destructor,
        .send_reset     = dccp_v6_ctl_send_reset,
+       .syn_ack_timeout = dccp_syn_ack_timeout,
 };
 
 static struct sock *dccp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index c12396f..d19f32a 100644 (file)
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -555,8 +555,7 @@ void inet_csk_reqsk_queue_prune(struct sock *parent,
                                syn_ack_recalc(req, thresh, max_retries,
                                               queue->rskq_defer_accept,
                                               &expire, &resend);
-                               if (req->rsk_ops->syn_ack_timeout)
-                                       req->rsk_ops->syn_ack_timeout(parent, req);
+                               req->rsk_ops->syn_ack_timeout(parent, req);
                                if (!expire &&
                                    (!resend ||
                                     !req->rsk_ops->rtx_syn_ack(parent, req, NULL) ||