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>
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 90332154..9711c9e 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);
}
