net: make ->{get,set}sockopt in proto_ops optional

Just check for a NULL method instead of wiring up
sock_no_{get,set}sockopt.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

17 files changed, 11 insertions, 50 deletions

diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 15787e8c0629..1d48708c5a2e 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1917,8 +1917,6 @@ static const struct proto_ops atalk_dgram_ops = {
 #endif
 	.listen		= sock_no_listen,
 	.shutdown	= sock_no_shutdown,
-	.setsockopt	= sock_no_setsockopt,
-	.getsockopt	= sock_no_getsockopt,
 	.sendmsg	= atalk_sendmsg,
 	.recvmsg	= atalk_recvmsg,
 	.mmap		= sock_no_mmap,
diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c
index cfd83c5521ae..d515571b2afb 100644
--- a/net/bluetooth/bnep/sock.c
+++ b/net/bluetooth/bnep/sock.c
@@ -182,8 +182,6 @@ static const struct proto_ops bnep_sock_ops = {
 	.recvmsg	= sock_no_recvmsg,
 	.listen		= sock_no_listen,
 	.shutdown	= sock_no_shutdown,
-	.setsockopt	= sock_no_setsockopt,
-	.getsockopt	= sock_no_getsockopt,
 	.connect	= sock_no_connect,
 	.socketpair	= sock_no_socketpair,
 	.accept		= sock_no_accept,
diff --git a/net/bluetooth/cmtp/sock.c b/net/bluetooth/cmtp/sock.c
index defdd4871919..96d49d9fae96 100644
--- a/net/bluetooth/cmtp/sock.c
+++ b/net/bluetooth/cmtp/sock.c
@@ -185,8 +185,6 @@ static const struct proto_ops cmtp_sock_ops = {
 	.recvmsg	= sock_no_recvmsg,
 	.listen		= sock_no_listen,
 	.shutdown	= sock_no_shutdown,
-	.setsockopt	= sock_no_setsockopt,
-	.getsockopt	= sock_no_getsockopt,
 	.connect	= sock_no_connect,
 	.socketpair	= sock_no_socketpair,
 	.accept		= sock_no_accept,
diff --git a/net/bluetooth/hidp/sock.c b/net/bluetooth/hidp/sock.c
index 03be6a4baef3..595fb3c9d6c3 100644
--- a/net/bluetooth/hidp/sock.c
+++ b/net/bluetooth/hidp/sock.c
@@ -233,8 +233,6 @@ static const struct proto_ops hidp_sock_ops = {
 	.recvmsg	= sock_no_recvmsg,
 	.listen		= sock_no_listen,
 	.shutdown	= sock_no_shutdown,
-	.setsockopt	= sock_no_setsockopt,
-	.getsockopt	= sock_no_getsockopt,
 	.connect	= sock_no_connect,
 	.socketpair	= sock_no_socketpair,
 	.accept		= sock_no_accept,
diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c
index ef14da50a981..b94ecd931002 100644
--- a/net/caif/caif_socket.c
+++ b/net/caif/caif_socket.c
@@ -981,7 +981,6 @@ static const struct proto_ops caif_seqpacket_ops = {
 	.listen = sock_no_listen,
 	.shutdown = sock_no_shutdown,
 	.setsockopt = setsockopt,
-	.getsockopt = sock_no_getsockopt,
 	.sendmsg = caif_seqpkt_sendmsg,
 	.recvmsg = caif_seqpkt_recvmsg,
 	.mmap = sock_no_mmap,
@@ -1002,7 +1001,6 @@ static const struct proto_ops caif_stream_ops = {
 	.listen = sock_no_listen,
 	.shutdown = sock_no_shutdown,
 	.setsockopt = setsockopt,
-	.getsockopt = sock_no_getsockopt,
 	.sendmsg = caif_stream_sendmsg,
 	.recvmsg = caif_stream_recvmsg,
 	.mmap = sock_no_mmap,
diff --git a/net/can/bcm.c b/net/can/bcm.c
index c96fa0f33db3..d14ea12affb1 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -1648,8 +1648,6 @@ static const struct proto_ops bcm_ops = {
 	.gettstamp     = sock_gettstamp,
 	.listen        = sock_no_listen,
 	.shutdown      = sock_no_shutdown,
-	.setsockopt    = sock_no_setsockopt,
-	.getsockopt    = sock_no_getsockopt,
 	.sendmsg       = bcm_sendmsg,
 	.recvmsg       = bcm_recvmsg,
 	.mmap          = sock_no_mmap,
diff --git a/net/core/sock.c b/net/core/sock.c
index 48655d5c4cf3..d828bfe1c47d 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2783,20 +2783,6 @@ int sock_no_shutdown(struct socket *sock, int how)
 }
 EXPORT_SYMBOL(sock_no_shutdown);
 
-int sock_no_setsockopt(struct socket *sock, int level, int optname,
-		    char __user *optval, unsigned int optlen)
-{
-	return -EOPNOTSUPP;
-}
-EXPORT_SYMBOL(sock_no_setsockopt);
-
-int sock_no_getsockopt(struct socket *sock, int level, int optname,
-		    char __user *optval, int __user *optlen)
-{
-	return -EOPNOTSUPP;
-}
-EXPORT_SYMBOL(sock_no_getsockopt);
-
 int sock_no_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
 {
 	return -EOPNOTSUPP;
diff --git a/net/key/af_key.c b/net/key/af_key.c
index b67ed3a8486c..f13626c1a985 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -3734,8 +3734,6 @@ static const struct proto_ops pfkey_ops = {
 	.ioctl		=	sock_no_ioctl,
 	.listen		=	sock_no_listen,
 	.shutdown	=	sock_no_shutdown,
-	.setsockopt	=	sock_no_setsockopt,
-	.getsockopt	=	sock_no_getsockopt,
 	.mmap		=	sock_no_mmap,
 	.sendpage	=	sock_no_sendpage,
 
diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
index 28604414dec1..6da1e2334bb6 100644
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -921,8 +921,6 @@ static const struct proto_ops llcp_rawsock_ops = {
 	.ioctl          = sock_no_ioctl,
 	.listen         = sock_no_listen,
 	.shutdown       = sock_no_shutdown,
-	.setsockopt     = sock_no_setsockopt,
-	.getsockopt     = sock_no_getsockopt,
 	.sendmsg        = sock_no_sendmsg,
 	.recvmsg        = llcp_sock_recvmsg,
 	.mmap           = sock_no_mmap,
diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index ba5ffd3badd3..b2061b6746ea 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -276,8 +276,6 @@ static const struct proto_ops rawsock_ops = {
 	.ioctl          = sock_no_ioctl,
 	.listen         = sock_no_listen,
 	.shutdown       = sock_no_shutdown,
-	.setsockopt     = sock_no_setsockopt,
-	.getsockopt     = sock_no_getsockopt,
 	.sendmsg        = rawsock_sendmsg,
 	.recvmsg        = rawsock_recvmsg,
 	.mmap           = sock_no_mmap,
@@ -296,8 +294,6 @@ static const struct proto_ops rawsock_raw_ops = {
 	.ioctl          = sock_no_ioctl,
 	.listen         = sock_no_listen,
 	.shutdown       = sock_no_shutdown,
-	.setsockopt     = sock_no_setsockopt,
-	.getsockopt     = sock_no_getsockopt,
 	.sendmsg        = sock_no_sendmsg,
 	.recvmsg        = rawsock_recvmsg,
 	.mmap           = sock_no_mmap,
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 35aee9e98053..c240fb5de3f0 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -4503,8 +4503,6 @@ static const struct proto_ops packet_ops_spkt = {
 	.gettstamp =	sock_gettstamp,
 	.listen =	sock_no_listen,
 	.shutdown =	sock_no_shutdown,
-	.setsockopt =	sock_no_setsockopt,
-	.getsockopt =	sock_no_getsockopt,
 	.sendmsg =	packet_sendmsg_spkt,
 	.recvmsg =	packet_recvmsg,
 	.mmap =		sock_no_mmap,
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index 87c60f83c180..2599235d592e 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -439,8 +439,6 @@ const struct proto_ops phonet_dgram_ops = {
 	.ioctl		= pn_socket_ioctl,
 	.listen		= sock_no_listen,
 	.shutdown	= sock_no_shutdown,
-	.setsockopt	= sock_no_setsockopt,
-	.getsockopt	= sock_no_getsockopt,
 	.sendmsg	= pn_socket_sendmsg,
 	.recvmsg	= sock_common_recvmsg,
 	.mmap		= sock_no_mmap,
diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index 24a8c3c6da0d..0cb4adfc6641 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -1208,8 +1208,6 @@ static const struct proto_ops qrtr_proto_ops = {
 	.gettstamp	= sock_gettstamp,
 	.poll		= datagram_poll,
 	.shutdown	= sock_no_shutdown,
-	.setsockopt	= sock_no_setsockopt,
-	.getsockopt	= sock_no_getsockopt,
 	.release	= qrtr_release,
 	.mmap		= sock_no_mmap,
 	.sendpage	= sock_no_sendpage,
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 903321543838..9711c9e0e515 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1742,8 +1742,11 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
 	/* generic setsockopts reaching us here always apply to the
 	 * CLC socket
 	 */
-	rc = smc->clcsock->ops->setsockopt(smc->clcsock, level, optname,
-					   optval, optlen);
+	if (unlikely(!smc->clcsock->ops->setsockopt))
+		rc = -EOPNOTSUPP;
+	else
+		rc = smc->clcsock->ops->setsockopt(smc->clcsock, level, optname,
+						   optval, optlen);
 	if (smc->clcsock->sk->sk_err) {
 		sk->sk_err = smc->clcsock->sk->sk_err;
 		sk->sk_error_report(sk);
@@ -1808,6 +1811,8 @@ static int smc_getsockopt(struct socket *sock, int level, int optname,
 
 	smc = smc_sk(sock->sk);
 	/* socket options apply to the CLC socket */
+	if (unlikely(!smc->clcsock->ops->getsockopt))
+		return -EOPNOTSUPP;
 	return smc->clcsock->ops->getsockopt(smc->clcsock, level, optname,
 					     optval, optlen);
 }
diff --git a/net/socket.c b/net/socket.c
index dec345982abb..93846568c2fb 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2131,6 +2131,8 @@ int __sys_setsockopt(int fd, int level, int optname, char __user *optval,
 
 	if (level == SOL_SOCKET && !sock_use_custom_sol_socket(sock))
 		err = sock_setsockopt(sock, level, optname, optval, optlen);
+	else if (unlikely(!sock->ops->setsockopt))
+		err = -EOPNOTSUPP;
 	else
 		err = sock->ops->setsockopt(sock, level, optname, optval,
 					    optlen);
@@ -2175,6 +2177,8 @@ int __sys_getsockopt(int fd, int level, int optname, char __user *optval,
 
 	if (level == SOL_SOCKET)
 		err = sock_getsockopt(sock, level, optname, optval, optlen);
+	else if (unlikely(!sock->ops->getsockopt))
+		err = -EOPNOTSUPP;
 	else
 		err = sock->ops->getsockopt(sock, level, optname, optval,
 					    optlen);
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 3385a7a0b231..181ea6fb56a6 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -714,8 +714,6 @@ static const struct proto_ops unix_stream_ops = {
 #endif
 	.listen =	unix_listen,
 	.shutdown =	unix_shutdown,
-	.setsockopt =	sock_no_setsockopt,
-	.getsockopt =	sock_no_getsockopt,
 	.sendmsg =	unix_stream_sendmsg,
 	.recvmsg =	unix_stream_recvmsg,
 	.mmap =		sock_no_mmap,
@@ -741,8 +739,6 @@ static const struct proto_ops unix_dgram_ops = {
 #endif
 	.listen =	sock_no_listen,
 	.shutdown =	unix_shutdown,
-	.setsockopt =	sock_no_setsockopt,
-	.getsockopt =	sock_no_getsockopt,
 	.sendmsg =	unix_dgram_sendmsg,
 	.recvmsg =	unix_dgram_recvmsg,
 	.mmap =		sock_no_mmap,
@@ -767,8 +763,6 @@ static const struct proto_ops unix_seqpacket_ops = {
 #endif
 	.listen =	unix_listen,
 	.shutdown =	unix_shutdown,
-	.setsockopt =	sock_no_setsockopt,
-	.getsockopt =	sock_no_getsockopt,
 	.sendmsg =	unix_seqpacket_sendmsg,
 	.recvmsg =	unix_seqpacket_recvmsg,
 	.mmap =		sock_no_mmap,
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 626bf9044418..df204c6761c4 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1202,8 +1202,6 @@ static const struct proto_ops vsock_dgram_ops = {
 	.ioctl = sock_no_ioctl,
 	.listen = sock_no_listen,
 	.shutdown = vsock_shutdown,
-	.setsockopt = sock_no_setsockopt,
-	.getsockopt = sock_no_getsockopt,
 	.sendmsg = vsock_dgram_sendmsg,
 	.recvmsg = vsock_dgram_recvmsg,
 	.mmap = sock_no_mmap,