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>

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index ac6cd65..9d50423 100644 (file)
--- 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);