[MPTCP] [RFC PATCH 06/16] tcp: expose tcp routines and structs for MPTCP

[Mat Martineau <mathew.j.martineau at linux.intel.com>]

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From: Peter Krystad <peter.krystad(a)intel.com>

tcp_v4_init_sock(), inet_compat_ioctl()
tcp_request_sock_ipv4_ops

This function is needed for MPTCP subflow initialization.

Signed-off-by: Peter Krystad <peter.krystad(a)intel.com>
---
 include/net/inet_common.h | 3 +++
 include/net/mptcp.h       | 2 ++
 include/net/tcp.h         | 1 +
 net/ipv4/af_inet.c        | 2 +-
 net/ipv4/tcp_ipv4.c       | 4 ++--
 5 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/include/net/inet_common.h b/include/net/inet_common.h
index 500f81375200..572d664b8e8f 100644
--- a/include/net/inet_common.h
+++ b/include/net/inet_common.h
@@ -35,6 +35,9 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
 int inet_getname(struct socket *sock, struct sockaddr *uaddr,
 		 int peer);
 int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+#ifdef CONFIG_COMPAT
+int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+#endif
 int inet_ctl_sock_create(struct sock **sk, unsigned short family,
 			 unsigned short type, unsigned char protocol,
 			 struct net *net);
diff --git a/include/net/mptcp.h b/include/net/mptcp.h
index 01f4f56f8886..6b4ae84ddf38 100644
--- a/include/net/mptcp.h
+++ b/include/net/mptcp.h
@@ -56,6 +56,8 @@ unsigned int mptcp_synack_options(struct request_sock *req,
 void mptcp_get_options(const struct sk_buff *skb,
 		       struct tcp_options_received *options);
 
+extern const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops;
+
 #else
 
 static inline void mptcp_parse_option(const unsigned char *ptr, int opsize,
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 58f33b024411..f1be93536463 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -430,6 +430,7 @@ struct sock *tcp_v4_syn_recv_sock(const struct sock *sk, struct sk_buff *skb,
 int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
 int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
 int tcp_connect(struct sock *sk);
+int tcp_v4_init_sock(struct sock *sk);
 enum tcp_synack_type {
 	TCP_SYNACK_NORMAL,
 	TCP_SYNACK_FASTOPEN,
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index f98e2f0db841..fd6657a01289 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -930,7 +930,7 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 EXPORT_SYMBOL(inet_ioctl);
 
 #ifdef CONFIG_COMPAT
-static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
 	struct sock *sk = sock->sk;
 	int err = -ENOIOCTLCMD;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 9639334ebb7c..1c1c1520931d 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1287,7 +1287,7 @@ struct request_sock_ops tcp_request_sock_ops __read_mostly = {
 	.syn_ack_timeout =	tcp_syn_ack_timeout,
 };
 
-static const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = {
+const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = {
 	.mss_clamp	=	TCP_MSS_DEFAULT,
 #ifdef CONFIG_TCP_MD5SIG
 	.req_md5_lookup	=	tcp_v4_md5_lookup,
@@ -1876,7 +1876,7 @@ static const struct tcp_sock_af_ops tcp_sock_ipv4_specific = {
 /* NOTE: A lot of things set to zero explicitly by call to
  *       sk_alloc() so need not be done here.
  */
-static int tcp_v4_init_sock(struct sock *sk)
+int tcp_v4_init_sock(struct sock *sk)
 {
 	struct inet_connection_sock *icsk = inet_csk(sk);
 
-- 
2.16.3