net/smc: expose smc proto operations

Externalize smc proto operations (smc_xxx) to allow
access from files other than af_smc.c

This is in preparation for the subsequent implementation
of the AF_INET version of SMC.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/smc/af_smc.c

@@ -170,15 +170,15 @@ static bool smc_hs_congested(const struct sock *sk)
 	return false;
 }
 
-static struct smc_hashinfo smc_v4_hashinfo = {
+struct smc_hashinfo smc_v4_hashinfo = {
 	.lock = __RW_LOCK_UNLOCKED(smc_v4_hashinfo.lock),
 };
 
-static struct smc_hashinfo smc_v6_hashinfo = {
+struct smc_hashinfo smc_v6_hashinfo = {
 	.lock = __RW_LOCK_UNLOCKED(smc_v6_hashinfo.lock),
 };
 
-static int smc_hash_sk(struct sock *sk)
+int smc_hash_sk(struct sock *sk)
 {
 	struct smc_hashinfo *h = sk->sk_prot->h.smc_hash;
 	struct hlist_head *head;
@@ -193,7 +193,7 @@ static int smc_hash_sk(struct sock *sk)
 	return 0;
 }
 
-static void smc_unhash_sk(struct sock *sk)
+void smc_unhash_sk(struct sock *sk)
 {
 	struct smc_hashinfo *h = sk->sk_prot->h.smc_hash;
 
@@ -207,7 +207,7 @@ static void smc_unhash_sk(struct sock *sk)
  * work which we didn't do because of user hold the sock_lock in the
  * BH context
  */
-static void smc_release_cb(struct sock *sk)
+void smc_release_cb(struct sock *sk)
 {
 	struct smc_sock *smc = smc_sk(sk);
 
@@ -307,7 +307,7 @@ static int __smc_release(struct smc_sock *smc)
 	return rc;
 }
 
-static int smc_release(struct socket *sock)
+int smc_release(struct socket *sock)
 {
 	struct sock *sk = sock->sk;
 	struct smc_sock *smc;
@@ -401,8 +401,8 @@ static struct sock *smc_sock_alloc(struct net *net, struct socket *sock,
 	return sk;
 }
 
-static int smc_bind(struct socket *sock, struct sockaddr *uaddr,
-		    int addr_len)
+int smc_bind(struct socket *sock, struct sockaddr *uaddr,
+	     int addr_len)
 {
 	struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
 	struct sock *sk = sock->sk;
@@ -1631,8 +1631,8 @@ static void smc_connect_work(struct work_struct *work)
 	release_sock(&smc->sk);
 }
 
-static int smc_connect(struct socket *sock, struct sockaddr *addr,
-		       int alen, int flags)
+int smc_connect(struct socket *sock, struct sockaddr *addr,
+		int alen, int flags)
 {
 	struct sock *sk = sock->sk;
 	struct smc_sock *smc;
@@ -2613,7 +2613,7 @@ static void smc_clcsock_data_ready(struct sock *listen_clcsock)
 	read_unlock_bh(&listen_clcsock->sk_callback_lock);
 }
 
-static int smc_listen(struct socket *sock, int backlog)
+int smc_listen(struct socket *sock, int backlog)
 {
 	struct sock *sk = sock->sk;
 	struct smc_sock *smc;
@@ -2678,8 +2678,8 @@ static int smc_listen(struct socket *sock, int backlog)
 	return rc;
 }
 
-static int smc_accept(struct socket *sock, struct socket *new_sock,
-		      struct proto_accept_arg *arg)
+int smc_accept(struct socket *sock, struct socket *new_sock,
+	       struct proto_accept_arg *arg)
 {
 	struct sock *sk = sock->sk, *nsk;
 	DECLARE_WAITQUEUE(wait, current);
@@ -2748,8 +2748,8 @@ static int smc_accept(struct socket *sock, struct socket *new_sock,
 	return rc;
 }
 
-static int smc_getname(struct socket *sock, struct sockaddr *addr,
-		       int peer)
+int smc_getname(struct socket *sock, struct sockaddr *addr,
+		int peer)
 {
 	struct smc_sock *smc;
 
@@ -2762,7 +2762,7 @@ static int smc_getname(struct socket *sock, struct sockaddr *addr,
 	return smc->clcsock->ops->getname(smc->clcsock, addr, peer);
 }
 
-static int smc_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
+int smc_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 {
 	struct sock *sk = sock->sk;
 	struct smc_sock *smc;
@@ -2800,8 +2800,8 @@ static int smc_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 	return rc;
 }
 
-static int smc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
-		       int flags)
+int smc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
+		int flags)
 {
 	struct sock *sk = sock->sk;
 	struct smc_sock *smc;
@@ -2850,8 +2850,8 @@ static __poll_t smc_accept_poll(struct sock *parent)
 	return mask;
 }
 
-static __poll_t smc_poll(struct file *file, struct socket *sock,
-			     poll_table *wait)
+__poll_t smc_poll(struct file *file, struct socket *sock,
+		  poll_table *wait)
 {
 	struct sock *sk = sock->sk;
 	struct smc_sock *smc;
@@ -2903,7 +2903,7 @@ static __poll_t smc_poll(struct file *file, struct socket *sock,
 	return mask;
 }
 
-static int smc_shutdown(struct socket *sock, int how)
+int smc_shutdown(struct socket *sock, int how)
 {
 	struct sock *sk = sock->sk;
 	bool do_shutdown = true;
@@ -3043,8 +3043,8 @@ static int __smc_setsockopt(struct socket *sock, int level, int optname,
 	return rc;
 }
 
-static int smc_setsockopt(struct socket *sock, int level, int optname,
-			  sockptr_t optval, unsigned int optlen)
+int smc_setsockopt(struct socket *sock, int level, int optname,
+		   sockptr_t optval, unsigned int optlen)
 {
 	struct sock *sk = sock->sk;
 	struct smc_sock *smc;
@@ -3130,8 +3130,8 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
 	return rc;
 }
 
-static int smc_getsockopt(struct socket *sock, int level, int optname,
-			  char __user *optval, int __user *optlen)
+int smc_getsockopt(struct socket *sock, int level, int optname,
+		   char __user *optval, int __user *optlen)
 {
 	struct smc_sock *smc;
 	int rc;
@@ -3156,8 +3156,8 @@ static int smc_getsockopt(struct socket *sock, int level, int optname,
 	return rc;
 }
 
-static int smc_ioctl(struct socket *sock, unsigned int cmd,
-		     unsigned long arg)
+int smc_ioctl(struct socket *sock, unsigned int cmd,
+	      unsigned long arg)
 {
 	union smc_host_cursor cons, urg;
 	struct smc_connection *conn;
@@ -3243,9 +3243,9 @@ static int smc_ioctl(struct socket *sock, unsigned int cmd,
  * Note that subsequent recv() calls have to wait till all splice() processing
  * completed.
  */
-static ssize_t smc_splice_read(struct socket *sock, loff_t *ppos,
-			       struct pipe_inode_info *pipe, size_t len,
-			       unsigned int flags)
+ssize_t smc_splice_read(struct socket *sock, loff_t *ppos,
+			struct pipe_inode_info *pipe, size_t len,
+			unsigned int flags)
 {
 	struct sock *sk = sock->sk;
 	struct smc_sock *smc;

net/smc/smc.h

@@ -34,6 +34,39 @@
 extern struct proto smc_proto;
 extern struct proto smc_proto6;
 
+extern struct smc_hashinfo smc_v4_hashinfo;
+extern struct smc_hashinfo smc_v6_hashinfo;
+
+int smc_hash_sk(struct sock *sk);
+void smc_unhash_sk(struct sock *sk);
+void smc_release_cb(struct sock *sk);
+
+int smc_release(struct socket *sock);
+int smc_bind(struct socket *sock, struct sockaddr *uaddr,
+	     int addr_len);
+int smc_connect(struct socket *sock, struct sockaddr *addr,
+		int alen, int flags);
+int smc_accept(struct socket *sock, struct socket *new_sock,
+	       struct proto_accept_arg *arg);
+int smc_getname(struct socket *sock, struct sockaddr *addr,
+		int peer);
+__poll_t smc_poll(struct file *file, struct socket *sock,
+		  poll_table *wait);
+int smc_ioctl(struct socket *sock, unsigned int cmd,
+	      unsigned long arg);
+int smc_listen(struct socket *sock, int backlog);
+int smc_shutdown(struct socket *sock, int how);
+int smc_setsockopt(struct socket *sock, int level, int optname,
+		   sockptr_t optval, unsigned int optlen);
+int smc_getsockopt(struct socket *sock, int level, int optname,
+		   char __user *optval, int __user *optlen);
+int smc_sendmsg(struct socket *sock, struct msghdr *msg, size_t len);
+int smc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
+		int flags);
+ssize_t smc_splice_read(struct socket *sock, loff_t *ppos,
+			struct pipe_inode_info *pipe, size_t len,
+			unsigned int flags);
+
 /* smc sock initialization */
 void smc_sk_init(struct net *net, struct sock *sk, int protocol);
 /* clcsock initialization */