[DCCP]: Move dccp_v4_{init,destroy}_sock to the core

Removing one more ipv6 uses ipv4 stuff case in dccp land.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 112 insertions, 104 deletions

diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index cd7c5d069ae4..8f3903be5598 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -228,8 +228,8 @@ extern int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 extern int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
                                 const struct dccp_hdr *dh, const unsigned len);
 
-extern int dccp_v4_init_sock(struct sock *sk);
-extern int dccp_v4_destroy_sock(struct sock *sk);
+extern int dccp_init_sock(struct sock *sk);
+extern int dccp_destroy_sock(struct sock *sk);
 
 extern void             dccp_close(struct sock *sk, long timeout);
 extern struct sk_buff   *dccp_make_response(struct sock *sk,
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 3baf4c76a89d..b26a4f8df4dc 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -1008,109 +1008,15 @@ struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
         .sockaddr_len   = sizeof(struct sockaddr_in),
 };
 
-int dccp_v4_init_sock(struct sock *sk)
+static int dccp_v4_init_sock(struct sock *sk)
 {
-        struct dccp_sock *dp = dccp_sk(sk);
-        struct inet_connection_sock *icsk = inet_csk(sk);
-        static int dccp_ctl_socket_init = 1;
-
-        dccp_options_init(&dp->dccps_options);
-        do_gettimeofday(&dp->dccps_epoch);
-
-        /*
-         * FIXME: We're hardcoding the CCID, and doing this at this point makes
-         * the listening (master) sock get CCID control blocks, which is not
-         * necessary, but for now, to not mess with the test userspace apps,
-         * lets leave it here, later the real solution is to do this in a
-         * setsockopt(CCIDs-I-want/accept). -acme
-         */
-        if (likely(!dccp_ctl_socket_init)) {
-                int rc = dccp_feat_init(sk);
-
-                if (rc)
-                        return rc;
-
-                if (dp->dccps_options.dccpo_send_ack_vector) {
-                        dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL);
-                        if (dp->dccps_hc_rx_ackvec == NULL)
-                                return -ENOMEM;
-                }
-                dp->dccps_hc_rx_ccid =
-                                ccid_hc_rx_new(dp->dccps_options.dccpo_rx_ccid,
-                                               sk, GFP_KERNEL);
-                dp->dccps_hc_tx_ccid =
-                                ccid_hc_tx_new(dp->dccps_options.dccpo_tx_ccid,
-                                               sk, GFP_KERNEL);
-                if (unlikely(dp->dccps_hc_rx_ccid == NULL ||
-                             dp->dccps_hc_tx_ccid == NULL)) {
-                        ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
-                        ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
-                        if (dp->dccps_options.dccpo_send_ack_vector) {
-                                dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
-                                dp->dccps_hc_rx_ackvec = NULL;
-                        }
-                        dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
-                        return -ENOMEM;
-                }
-        } else {
-                /* control socket doesn't need feat nego */
-                INIT_LIST_HEAD(&dp->dccps_options.dccpo_pending);
-                INIT_LIST_HEAD(&dp->dccps_options.dccpo_conf);
-                dccp_ctl_socket_init = 0;
-        }
-
-        dccp_init_xmit_timers(sk);
-        icsk->icsk_rto = DCCP_TIMEOUT_INIT;
-        sk->sk_state = DCCP_CLOSED;
-        sk->sk_write_space = dccp_write_space;
-        icsk->icsk_af_ops = &dccp_ipv4_af_ops;
-        icsk->icsk_sync_mss = dccp_sync_mss;
-        dp->dccps_mss_cache = 536;
-        dp->dccps_role = DCCP_ROLE_UNDEFINED;
-        dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;
-        dp->dccps_l_ack_ratio = dp->dccps_r_ack_ratio = 1;
-
-        return 0;
-}
-
-EXPORT_SYMBOL_GPL(dccp_v4_init_sock);
+        const int err = dccp_init_sock(sk);
 
-int dccp_v4_destroy_sock(struct sock *sk)
-{
-        struct dccp_sock *dp = dccp_sk(sk);
-
-        /*
-         * DCCP doesn't use sk_write_queue, just sk_send_head
-         * for retransmissions
-         */
-        if (sk->sk_send_head != NULL) {
-                kfree_skb(sk->sk_send_head);
-                sk->sk_send_head = NULL;
-        }
-
-        /* Clean up a referenced DCCP bind bucket. */
-        if (inet_csk(sk)->icsk_bind_hash != NULL)
-                inet_put_port(&dccp_hashinfo, sk);
-
-        kfree(dp->dccps_service_list);
-        dp->dccps_service_list = NULL;
-
-        if (dp->dccps_options.dccpo_send_ack_vector) {
-                dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
-                dp->dccps_hc_rx_ackvec = NULL;
-        }
-        ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
-        ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
-        dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
-
-        /* clean up feature negotiation state */
-        dccp_feat_clean(sk);
-
-        return 0;
+        if (err == 0)
+                inet_csk(sk)->icsk_af_ops = &dccp_ipv4_af_ops;
+        return err;
 }
 
-EXPORT_SYMBOL_GPL(dccp_v4_destroy_sock);
-
 static void dccp_v4_reqsk_destructor(struct request_sock *req)
 {
         kfree(inet_rsk(req)->opt);
@@ -1147,7 +1053,7 @@ struct proto dccp_prot = {
         .accept                 = inet_csk_accept,
         .get_port               = dccp_v4_get_port,
         .shutdown               = dccp_shutdown,
-        .destroy                = dccp_v4_destroy_sock,
+        .destroy                = dccp_destroy_sock,
         .orphan_count           = &dccp_orphan_count,
         .max_header             = MAX_DCCP_HEADER,
         .obj_size               = sizeof(struct dccp_sock),
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index ad5a1c66362d..84651bc6453b 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -1146,7 +1146,7 @@ static struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
  */
 static int dccp_v6_init_sock(struct sock *sk)
 {
-        int err = dccp_v4_init_sock(sk);
+        int err = dccp_init_sock(sk);
 
         if (err == 0)
                 inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops;
@@ -1156,7 +1156,7 @@ static int dccp_v6_init_sock(struct sock *sk)
 
 static int dccp_v6_destroy_sock(struct sock *sk)
 {
-        dccp_v4_destroy_sock(sk);
+        dccp_destroy_sock(sk);
         return inet6_destroy_sock(sk);
 }
 
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 6403e9306ddb..1c32def26533 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -97,6 +97,108 @@ const char *dccp_state_name(const int state)
 
 EXPORT_SYMBOL_GPL(dccp_state_name);
 
+int dccp_init_sock(struct sock *sk)
+{
+        struct dccp_sock *dp = dccp_sk(sk);
+        struct inet_connection_sock *icsk = inet_csk(sk);
+        static int dccp_ctl_socket_init = 1;
+
+        dccp_options_init(&dp->dccps_options);
+        do_gettimeofday(&dp->dccps_epoch);
+
+        /*
+         * FIXME: We're hardcoding the CCID, and doing this at this point makes
+         * the listening (master) sock get CCID control blocks, which is not
+         * necessary, but for now, to not mess with the test userspace apps,
+         * lets leave it here, later the real solution is to do this in a
+         * setsockopt(CCIDs-I-want/accept). -acme
+         */
+        if (likely(!dccp_ctl_socket_init)) {
+                int rc = dccp_feat_init(sk);
+
+                if (rc)
+                        return rc;
+
+                if (dp->dccps_options.dccpo_send_ack_vector) {
+                        dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL);
+                        if (dp->dccps_hc_rx_ackvec == NULL)
+                                return -ENOMEM;
+                }
+                dp->dccps_hc_rx_ccid =
+                                ccid_hc_rx_new(dp->dccps_options.dccpo_rx_ccid,
+                                               sk, GFP_KERNEL);
+                dp->dccps_hc_tx_ccid =
+                                ccid_hc_tx_new(dp->dccps_options.dccpo_tx_ccid,
+                                               sk, GFP_KERNEL);
+                if (unlikely(dp->dccps_hc_rx_ccid == NULL ||
+                             dp->dccps_hc_tx_ccid == NULL)) {
+                        ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
+                        ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
+                        if (dp->dccps_options.dccpo_send_ack_vector) {
+                                dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
+                                dp->dccps_hc_rx_ackvec = NULL;
+                        }
+                        dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
+                        return -ENOMEM;
+                }
+        } else {
+                /* control socket doesn't need feat nego */
+                INIT_LIST_HEAD(&dp->dccps_options.dccpo_pending);
+                INIT_LIST_HEAD(&dp->dccps_options.dccpo_conf);
+                dccp_ctl_socket_init = 0;
+        }
+
+        dccp_init_xmit_timers(sk);
+        icsk->icsk_rto          = DCCP_TIMEOUT_INIT;
+        sk->sk_state            = DCCP_CLOSED;
+        sk->sk_write_space      = dccp_write_space;
+        icsk->icsk_sync_mss     = dccp_sync_mss;
+        dp->dccps_mss_cache     = 536;
+        dp->dccps_role          = DCCP_ROLE_UNDEFINED;
+        dp->dccps_service       = DCCP_SERVICE_INVALID_VALUE;
+        dp->dccps_l_ack_ratio   = dp->dccps_r_ack_ratio = 1;
+
+        return 0;
+}
+
+EXPORT_SYMBOL_GPL(dccp_init_sock);
+
+int dccp_destroy_sock(struct sock *sk)
+{
+        struct dccp_sock *dp = dccp_sk(sk);
+
+        /*
+         * DCCP doesn't use sk_write_queue, just sk_send_head
+         * for retransmissions
+         */
+        if (sk->sk_send_head != NULL) {
+                kfree_skb(sk->sk_send_head);
+                sk->sk_send_head = NULL;
+        }
+
+        /* Clean up a referenced DCCP bind bucket. */
+        if (inet_csk(sk)->icsk_bind_hash != NULL)
+                inet_put_port(&dccp_hashinfo, sk);
+
+        kfree(dp->dccps_service_list);
+        dp->dccps_service_list = NULL;
+
+        if (dp->dccps_options.dccpo_send_ack_vector) {
+                dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
+                dp->dccps_hc_rx_ackvec = NULL;
+        }
+        ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk);
+        ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
+        dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
+
+        /* clean up feature negotiation state */
+        dccp_feat_clean(sk);
+
+        return 0;
+}
+
+EXPORT_SYMBOL_GPL(dccp_destroy_sock);
+
 static inline int dccp_listen_start(struct sock *sk)
 {
         struct dccp_sock *dp = dccp_sk(sk);