1 files changed, 124 insertions, 156 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 3a25cf743f8b..1d8b75a58981 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -138,6 +138,14 @@ int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
 }
 EXPORT_SYMBOL_GPL(tcp_twsk_unique);
 
+static int tcp_repair_connect(struct sock *sk)
+{
+	tcp_connect_init(sk);
+	tcp_finish_connect(sk, NULL);
+
+	return 0;
+}
+
 /* This will initiate an outgoing connection. */
 int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 {
@@ -196,26 +204,13 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 		/* Reset inherited state */
 		tp->rx_opt.ts_recent	   = 0;
 		tp->rx_opt.ts_recent_stamp = 0;
-		tp->write_seq		   = 0;
+		if (likely(!tp->repair))
+			tp->write_seq	   = 0;
 	}
 
 	if (tcp_death_row.sysctl_tw_recycle &&
-	    !tp->rx_opt.ts_recent_stamp && fl4->daddr == daddr) {
-		struct inet_peer *peer = rt_get_peer(rt, fl4->daddr);
-		/*
-		 * VJ's idea. We save last timestamp seen from
-		 * the destination in peer table, when entering state
-		 * TIME-WAIT * and initialize rx_opt.ts_recent from it,
-		 * when trying new connection.
-		 */
-		if (peer) {
-			inet_peer_refcheck(peer);
-			if ((u32)get_seconds() - peer->tcp_ts_stamp <= TCP_PAWS_MSL) {
-				tp->rx_opt.ts_recent_stamp = peer->tcp_ts_stamp;
-				tp->rx_opt.ts_recent = peer->tcp_ts;
-			}
-		}
-	}
+	    !tp->rx_opt.ts_recent_stamp && fl4->daddr == daddr)
+		tcp_fetch_timewait_stamp(sk, &rt->dst);
 
 	inet->inet_dport = usin->sin_port;
 	inet->inet_daddr = daddr;
@@ -247,7 +242,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	sk->sk_gso_type = SKB_GSO_TCPV4;
 	sk_setup_caps(sk, &rt->dst);
 
-	if (!tp->write_seq)
+	if (!tp->write_seq && likely(!tp->repair))
 		tp->write_seq = secure_tcp_sequence_number(inet->inet_saddr,
 							   inet->inet_daddr,
 							   inet->inet_sport,
@@ -255,7 +250,11 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 
 	inet->inet_id = tp->write_seq ^ jiffies;
 
-	err = tcp_connect(sk);
+	if (likely(!tp->repair))
+		err = tcp_connect(sk);
+	else
+		err = tcp_repair_connect(sk);
+
 	rt = NULL;
 	if (err)
 		goto failure;
@@ -290,17 +289,10 @@ static void do_pmtu_discovery(struct sock *sk, const struct iphdr *iph, u32 mtu)
 	if (sk->sk_state == TCP_LISTEN)
 		return;
 
-	/* We don't check in the destentry if pmtu discovery is forbidden
-	 * on this route. We just assume that no packet_to_big packets
-	 * are send back when pmtu discovery is not active.
-	 * There is a small race when the user changes this flag in the
-	 * route, but I think that's acceptable.
-	 */
-	if ((dst = __sk_dst_check(sk, 0)) == NULL)
+	dst = inet_csk_update_pmtu(sk, mtu);
+	if (!dst)
 		return;
 
-	dst->ops->update_pmtu(dst, mtu);
-
 	/* Something is about to be wrong... Remember soft error
 	 * for the case, if this connection will not able to recover.
 	 */
@@ -322,6 +314,14 @@ static void do_pmtu_discovery(struct sock *sk, const struct iphdr *iph, u32 mtu)
 	} /* else let the usual retransmit timer handle it */
 }
 
+static void do_redirect(struct sk_buff *skb, struct sock *sk)
+{
+	struct dst_entry *dst = __sk_dst_check(sk, 0);
+
+	if (dst)
+		dst->ops->redirect(dst, sk, skb);
+}
+
 /*
  * This routine is called by the ICMP module when it gets some
  * sort of error condition.  If err < 0 then the socket should
@@ -395,6 +395,9 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
 	}
 
 	switch (type) {
+	case ICMP_REDIRECT:
+		do_redirect(icmp_skb, sk);
+		goto out;
 	case ICMP_SOURCE_QUENCH:
 		/* Just silently ignore these. */
 		goto out;
@@ -685,8 +688,8 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
 
 	net = dev_net(skb_dst(skb)->dev);
 	arg.tos = ip_hdr(skb)->tos;
-	ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr,
-		      &arg, arg.iov[0].iov_len);
+	ip_send_unicast_reply(net, skb, ip_hdr(skb)->saddr,
+			      ip_hdr(skb)->daddr, &arg, arg.iov[0].iov_len);
 
 	TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
 	TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS);
@@ -768,8 +771,8 @@ static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
 	if (oif)
 		arg.bound_dev_if = oif;
 	arg.tos = tos;
-	ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr,
-		      &arg, arg.iov[0].iov_len);
+	ip_send_unicast_reply(net, skb, ip_hdr(skb)->saddr,
+			      ip_hdr(skb)->daddr, &arg, arg.iov[0].iov_len);
 
 	TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
 }
@@ -811,7 +814,9 @@ static void tcp_v4_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
  */
 static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
 			      struct request_sock *req,
-			      struct request_values *rvp)
+			      struct request_values *rvp,
+			      u16 queue_mapping,
+			      bool nocache)
 {
 	const struct inet_request_sock *ireq = inet_rsk(req);
 	struct flowi4 fl4;
@@ -819,7 +824,7 @@ static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
 	struct sk_buff * skb;
 
 	/* First, grab a route. */
-	if (!dst && (dst = inet_csk_route_req(sk, &fl4, req)) == NULL)
+	if (!dst && (dst = inet_csk_route_req(sk, &fl4, req, nocache)) == NULL)
 		return -1;
 
 	skb = tcp_make_synack(sk, dst, req, rvp);
@@ -827,13 +832,13 @@ static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
 	if (skb) {
 		__tcp_v4_send_check(skb, ireq->loc_addr, ireq->rmt_addr);
 
+		skb_set_queue_mapping(skb, queue_mapping);
 		err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
 					    ireq->rmt_addr,
 					    ireq->opt);
 		err = net_xmit_eval(err);
 	}
 
-	dst_release(dst);
 	return err;
 }
 
@@ -841,7 +846,7 @@ static int tcp_v4_rtx_synack(struct sock *sk, struct request_sock *req,
 			      struct request_values *rvp)
 {
 	TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
-	return tcp_v4_send_synack(sk, NULL, req, rvp);
+	return tcp_v4_send_synack(sk, NULL, req, rvp, 0, false);
 }
 
 /*
@@ -853,14 +858,14 @@ static void tcp_v4_reqsk_destructor(struct request_sock *req)
 }
 
 /*
- * Return 1 if a syncookie should be sent
+ * Return true if a syncookie should be sent
  */
-int tcp_syn_flood_action(struct sock *sk,
+bool tcp_syn_flood_action(struct sock *sk,
 			 const struct sk_buff *skb,
 			 const char *proto)
 {
 	const char *msg = "Dropping request";
-	int want_cookie = 0;
+	bool want_cookie = false;
 	struct listen_sock *lopt;
 
 
@@ -868,7 +873,7 @@ int tcp_syn_flood_action(struct sock *sk,
 #ifdef CONFIG_SYN_COOKIES
 	if (sysctl_tcp_syncookies) {
 		msg = "Sending cookies";
-		want_cookie = 1;
+		want_cookie = true;
 		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPREQQFULLDOCOOKIES);
 	} else
 #endif
@@ -1183,7 +1188,7 @@ clear_hash_noput:
 }
 EXPORT_SYMBOL(tcp_v4_md5_hash_skb);
 
-static int tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
+static bool tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
 {
 	/*
 	 * This gets called for each TCP segment that arrives
@@ -1206,16 +1211,16 @@ static int tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
 
 	/* We've parsed the options - do we have a hash? */
 	if (!hash_expected && !hash_location)
-		return 0;
+		return false;
 
 	if (hash_expected && !hash_location) {
 		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND);
-		return 1;
+		return true;
 	}
 
 	if (!hash_expected && hash_location) {
 		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED);
-		return 1;
+		return true;
 	}
 
 	/* Okay, so this is hash_expected and hash_location -
@@ -1226,15 +1231,14 @@ static int tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
 				      NULL, NULL, skb);
 
 	if (genhash || memcmp(hash_location, newhash, 16) != 0) {
-		if (net_ratelimit()) {
-			pr_info("MD5 Hash failed for (%pI4, %d)->(%pI4, %d)%s\n",
-				&iph->saddr, ntohs(th->source),
-				&iph->daddr, ntohs(th->dest),
-				genhash ? " tcp_v4_calc_md5_hash failed" : "");
-		}
-		return 1;
+		net_info_ratelimited("MD5 Hash failed for (%pI4, %d)->(%pI4, %d)%s\n",
+				     &iph->saddr, ntohs(th->source),
+				     &iph->daddr, ntohs(th->dest),
+				     genhash ? " tcp_v4_calc_md5_hash failed"
+				     : "");
+		return true;
 	}
-	return 0;
+	return false;
 }
 
 #endif
@@ -1268,7 +1272,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 	__be32 saddr = ip_hdr(skb)->saddr;
 	__be32 daddr = ip_hdr(skb)->daddr;
 	__u32 isn = TCP_SKB_CB(skb)->when;
-	int want_cookie = 0;
+	bool want_cookie = false;
 
 	/* Never answer to SYNs send to broadcast or multicast */
 	if (skb_rtable(skb)->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
@@ -1303,7 +1307,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 	tcp_clear_options(&tmp_opt);
 	tmp_opt.mss_clamp = TCP_MSS_DEFAULT;
 	tmp_opt.user_mss  = tp->rx_opt.user_mss;
-	tcp_parse_options(skb, &tmp_opt, &hash_location, 0);
+	tcp_parse_options(skb, &tmp_opt, &hash_location, 0, NULL);
 
 	if (tmp_opt.cookie_plus > 0 &&
 	    tmp_opt.saw_tstamp &&
@@ -1327,7 +1331,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 		while (l-- > 0)
 			*c++ ^= *hash_location++;
 
-		want_cookie = 0;	/* not our kind of cookie */
+		want_cookie = false;	/* not our kind of cookie */
 		tmp_ext.cookie_out_never = 0; /* false */
 		tmp_ext.cookie_plus = tmp_opt.cookie_plus;
 	} else if (!tp->rx_opt.cookie_in_always) {
@@ -1355,13 +1359,12 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 		goto drop_and_free;
 
 	if (!want_cookie || tmp_opt.tstamp_ok)
-		TCP_ECN_create_request(req, tcp_hdr(skb));
+		TCP_ECN_create_request(req, skb);
 
 	if (want_cookie) {
 		isn = cookie_v4_init_sequence(sk, skb, &req->mss);
 		req->cookie_ts = tmp_opt.tstamp_ok;
 	} else if (!isn) {
-		struct inet_peer *peer = NULL;
 		struct flowi4 fl4;
 
 		/* VJ's idea. We save last timestamp seen
@@ -1375,13 +1378,9 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 		 */
 		if (tmp_opt.saw_tstamp &&
 		    tcp_death_row.sysctl_tw_recycle &&
-		    (dst = inet_csk_route_req(sk, &fl4, req)) != NULL &&
-		    fl4.daddr == saddr &&
-		    (peer = rt_get_peer((struct rtable *)dst, fl4.daddr)) != NULL) {
-			inet_peer_refcheck(peer);
-			if ((u32)get_seconds() - peer->tcp_ts_stamp < TCP_PAWS_MSL &&
-			    (s32)(peer->tcp_ts - req->ts_recent) >
-							TCP_PAWS_WINDOW) {
+		    (dst = inet_csk_route_req(sk, &fl4, req, want_cookie)) != NULL &&
+		    fl4.daddr == saddr) {
+			if (!tcp_peer_is_proven(req, dst, true)) {
 				NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_PAWSPASSIVEREJECTED);
 				goto drop_and_release;
 			}
@@ -1390,8 +1389,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 		else if (!sysctl_tcp_syncookies &&
 			 (sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) <
 			  (sysctl_max_syn_backlog >> 2)) &&
-			 (!peer || !peer->tcp_ts_stamp) &&
-			 (!dst || !dst_metric(dst, RTAX_RTT))) {
+			 !tcp_peer_is_proven(req, dst, false)) {
 			/* Without syncookies last quarter of
 			 * backlog is filled with destinations,
 			 * proven to be alive.
@@ -1410,7 +1408,9 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 	tcp_rsk(req)->snt_synack = tcp_time_stamp;
 
 	if (tcp_v4_send_synack(sk, dst, req,
-			       (struct request_values *)&tmp_ext) ||
+			       (struct request_values *)&tmp_ext,
+			       skb_get_queue_mapping(skb),
+			       want_cookie) ||
 	    want_cookie)
 		goto drop_and_free;
 
@@ -1657,6 +1657,51 @@ csum_err:
 }
 EXPORT_SYMBOL(tcp_v4_do_rcv);
 
+void tcp_v4_early_demux(struct sk_buff *skb)
+{
+	struct net *net = dev_net(skb->dev);
+	const struct iphdr *iph;
+	const struct tcphdr *th;
+	struct net_device *dev;
+	struct sock *sk;
+
+	if (skb->pkt_type != PACKET_HOST)
+		return;
+
+	if (!pskb_may_pull(skb, ip_hdrlen(skb) + sizeof(struct tcphdr)))
+		return;
+
+	iph = ip_hdr(skb);
+	th = (struct tcphdr *) ((char *)iph + ip_hdrlen(skb));
+
+	if (th->doff < sizeof(struct tcphdr) / 4)
+		return;
+
+	if (!pskb_may_pull(skb, ip_hdrlen(skb) + th->doff * 4))
+		return;
+
+	dev = skb->dev;
+	sk = __inet_lookup_established(net, &tcp_hashinfo,
+				       iph->saddr, th->source,
+				       iph->daddr, ntohs(th->dest),
+				       dev->ifindex);
+	if (sk) {
+		skb->sk = sk;
+		skb->destructor = sock_edemux;
+		if (sk->sk_state != TCP_TIME_WAIT) {
+			struct dst_entry *dst = sk->sk_rx_dst;
+			if (dst)
+				dst = dst_check(dst, 0);
+			if (dst) {
+				struct rtable *rt = (struct rtable *) dst;
+
+				if (rt->rt_iif == dev->ifindex)
+					skb_dst_set_noref(skb, dst);
+			}
+		}
+	}
+}
+
 /*
  *	From tcp_input.c
  */
@@ -1730,7 +1775,7 @@ process:
 #ifdef CONFIG_NET_DMA
 		struct tcp_sock *tp = tcp_sk(sk);
 		if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list)
-			tp->ucopy.dma_chan = dma_find_channel(DMA_MEMCPY);
+			tp->ucopy.dma_chan = net_dma_find_channel();
 		if (tp->ucopy.dma_chan)
 			ret = tcp_v4_do_rcv(sk, skb);
 		else
@@ -1739,7 +1784,8 @@ process:
 			if (!tcp_prequeue(sk, skb))
 				ret = tcp_v4_do_rcv(sk, skb);
 		}
-	} else if (unlikely(sk_add_backlog(sk, skb))) {
+	} else if (unlikely(sk_add_backlog(sk, skb,
+					   sk->sk_rcvbuf + sk->sk_sndbuf))) {
 		bh_unlock_sock(sk);
 		NET_INC_STATS_BH(net, LINUX_MIB_TCPBACKLOGDROP);
 		goto discard_and_relse;
@@ -1805,40 +1851,10 @@ do_time_wait:
 	goto discard_it;
 }
 
-struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it)
-{
-	struct rtable *rt = (struct rtable *) __sk_dst_get(sk);
-	struct inet_sock *inet = inet_sk(sk);
-	struct inet_peer *peer;
-
-	if (!rt ||
-	    inet->cork.fl.u.ip4.daddr != inet->inet_daddr) {
-		peer = inet_getpeer_v4(inet->inet_daddr, 1);
-		*release_it = true;
-	} else {
-		if (!rt->peer)
-			rt_bind_peer(rt, inet->inet_daddr, 1);
-		peer = rt->peer;
-		*release_it = false;
-	}
-
-	return peer;
-}
-EXPORT_SYMBOL(tcp_v4_get_peer);
-
-void *tcp_v4_tw_get_peer(struct sock *sk)
-{
-	const struct inet_timewait_sock *tw = inet_twsk(sk);
-
-	return inet_getpeer_v4(tw->tw_daddr, 1);
-}
-EXPORT_SYMBOL(tcp_v4_tw_get_peer);
-
 static struct timewait_sock_ops tcp_timewait_sock_ops = {
 	.twsk_obj_size	= sizeof(struct tcp_timewait_sock),
 	.twsk_unique	= tcp_twsk_unique,
 	.twsk_destructor= tcp_twsk_destructor,
-	.twsk_getpeer	= tcp_v4_tw_get_peer,
 };
 
 const struct inet_connection_sock_af_ops ipv4_specific = {
@@ -1847,7 +1863,6 @@ const struct inet_connection_sock_af_ops ipv4_specific = {
 	.rebuild_header	   = inet_sk_rebuild_header,
 	.conn_request	   = tcp_v4_conn_request,
 	.syn_recv_sock	   = tcp_v4_syn_recv_sock,
-	.get_peer	   = tcp_v4_get_peer,
 	.net_header_len	   = sizeof(struct iphdr),
 	.setsockopt	   = ip_setsockopt,
 	.getsockopt	   = ip_getsockopt,
@@ -1875,64 +1890,15 @@ static const struct tcp_sock_af_ops tcp_sock_ipv4_specific = {
 static int tcp_v4_init_sock(struct sock *sk)
 {
 	struct inet_connection_sock *icsk = inet_csk(sk);
-	struct tcp_sock *tp = tcp_sk(sk);
-
-	skb_queue_head_init(&tp->out_of_order_queue);
-	tcp_init_xmit_timers(sk);
-	tcp_prequeue_init(tp);
-
-	icsk->icsk_rto = TCP_TIMEOUT_INIT;
-	tp->mdev = TCP_TIMEOUT_INIT;
-
-	/* So many TCP implementations out there (incorrectly) count the
-	 * initial SYN frame in their delayed-ACK and congestion control
-	 * algorithms that we must have the following bandaid to talk
-	 * efficiently to them.  -DaveM
-	 */
-	tp->snd_cwnd = TCP_INIT_CWND;
-
-	/* See draft-stevens-tcpca-spec-01 for discussion of the
-	 * initialization of these values.
-	 */
-	tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
-	tp->snd_cwnd_clamp = ~0;
-	tp->mss_cache = TCP_MSS_DEFAULT;
 
-	tp->reordering = sysctl_tcp_reordering;
-	icsk->icsk_ca_ops = &tcp_init_congestion_ops;
-
-	sk->sk_state = TCP_CLOSE;
-
-	sk->sk_write_space = sk_stream_write_space;
-	sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
+	tcp_init_sock(sk);
 
 	icsk->icsk_af_ops = &ipv4_specific;
-	icsk->icsk_sync_mss = tcp_sync_mss;
+
 #ifdef CONFIG_TCP_MD5SIG
-	tp->af_specific = &tcp_sock_ipv4_specific;
+	tcp_sk(sk)->af_specific = &tcp_sock_ipv4_specific;
 #endif
 
-	/* TCP Cookie Transactions */
-	if (sysctl_tcp_cookie_size > 0) {
-		/* Default, cookies without s_data_payload. */
-		tp->cookie_values =
-			kzalloc(sizeof(*tp->cookie_values),
-				sk->sk_allocation);
-		if (tp->cookie_values != NULL)
-			kref_init(&tp->cookie_values->kref);
-	}
-	/* Presumed zeroed, in order of appearance:
-	 *	cookie_in_always, cookie_out_never,
-	 *	s_data_constant, s_data_in, s_data_out
-	 */
-	sk->sk_sndbuf = sysctl_tcp_wmem[1];
-	sk->sk_rcvbuf = sysctl_tcp_rmem[1];
-
-	local_bh_disable();
-	sock_update_memcg(sk);
-	sk_sockets_allocated_inc(sk);
-	local_bh_enable();
-
 	return 0;
 }
 
@@ -1986,6 +1952,9 @@ void tcp_v4_destroy_sock(struct sock *sk)
 		tp->cookie_values = NULL;
 	}
 
+	/* If socket is aborted during connect operation */
+	tcp_free_fastopen_req(tp);
+
 	sk_sockets_allocated_dec(sk);
 	sock_release_memcg(sk);
 }
@@ -2109,7 +2078,7 @@ static void *listening_get_idx(struct seq_file *seq, loff_t *pos)
 	return rc;
 }
 
-static inline int empty_bucket(struct tcp_iter_state *st)
+static inline bool empty_bucket(struct tcp_iter_state *st)
 {
 	return hlist_nulls_empty(&tcp_hashinfo.ehash[st->bucket].chain) &&
 		hlist_nulls_empty(&tcp_hashinfo.ehash[st->bucket].twchain);
@@ -2626,6 +2595,7 @@ struct proto tcp_prot = {
 	.sendmsg		= tcp_sendmsg,
 	.sendpage		= tcp_sendpage,
 	.backlog_rcv		= tcp_v4_do_rcv,
+	.release_cb		= tcp_release_cb,
 	.hash			= inet_hash,
 	.unhash			= inet_unhash,
 	.get_port		= inet_csk_get_port,
@@ -2657,13 +2627,11 @@ EXPORT_SYMBOL(tcp_prot);
 
 static int __net_init tcp_sk_init(struct net *net)
 {
-	return inet_ctl_sock_create(&net->ipv4.tcp_sock,
-				    PF_INET, SOCK_RAW, IPPROTO_TCP, net);
+	return 0;
 }
 
 static void __net_exit tcp_sk_exit(struct net *net)
 {
-	inet_ctl_sock_destroy(net->ipv4.tcp_sock);
 }
 
 static void __net_exit tcp_sk_exit_batch(struct list_head *net_exit_list)