SUNRPC: Ensure IPV6_V6ONLY is set on the socket before binding to a port

Also ensure that we use the protocol family instead of the address
family when calling sock_create_kern().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 24 insertions, 12 deletions

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index ac6cd65220c..9d504234af4 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1110,7 +1110,6 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
         struct svc_sock *svsk;
         struct sock     *inet;
         int             pmap_register = !(flags & SVC_SOCK_ANONYMOUS);
-        int             val;
 
         dprintk("svc: svc_setup_socket %p\n", sock);
         if (!(svsk = kzalloc(sizeof(*svsk), GFP_KERNEL))) {
@@ -1143,16 +1142,6 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
         else
                 svc_tcp_init(svsk, serv);
 
-        /*
-         * If this is a PF_INET6 listener, we want to avoid
-         * getting requests from IPv4 remotes.  Those should
-         * be shunted to a PF_INET listener via rpcbind.
-         */
-        val = 1;
-        if (inet->sk_family == PF_INET6)
-                kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY,
-                                        (char *)&val, sizeof(val));
-
         dprintk("svc: svc_setup_socket created %p (inet %p)\n",
                                 svsk, svsk->sk_sk);
 
@@ -1220,6 +1209,8 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv,
         struct sockaddr_storage addr;
         struct sockaddr *newsin = (struct sockaddr *)&addr;
         int             newlen;
+        int             family;
+        int             val;
         RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
 
         dprintk("svc: svc_create_socket(%s, %d, %s)\n",
@@ -1231,14 +1222,35 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv,
                                 "sockets supported\n");
                 return ERR_PTR(-EINVAL);
         }
+
         type = (protocol == IPPROTO_UDP)? SOCK_DGRAM : SOCK_STREAM;
+        switch (sin->sa_family) {
+        case AF_INET6:
+                family = PF_INET6;
+                break;
+        case AF_INET:
+                family = PF_INET;
+                break;
+        default:
+                return ERR_PTR(-EINVAL);
+        }
 
-        error = sock_create_kern(sin->sa_family, type, protocol, &sock);
+        error = sock_create_kern(family, type, protocol, &sock);
         if (error < 0)
                 return ERR_PTR(error);
 
         svc_reclassify_socket(sock);
 
+        /*
+         * If this is an PF_INET6 listener, we want to avoid
+         * getting requests from IPv4 remotes.  Those should
+         * be shunted to a PF_INET listener via rpcbind.
+         */
+        val = 1;
+        if (family == PF_INET6)
+                kernel_setsockopt(sock, SOL_IPV6, IPV6_V6ONLY,
+                                        (char *)&val, sizeof(val));
+
         if (type == SOCK_STREAM)
                 sock->sk->sk_reuse = 1;         /* allow address reuse */
         error = kernel_bind(sock, sin, len);