[PATCH] knfsd: SUNRPC: Support IPv6 addresses in svc_tcp_accept

Modify svc_tcp_accept to support connecting on IPv6 sockets.
Signed-off-by: NChuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

net/sunrpc/svcsock.c

@@ -960,7 +960,8 @@ static inline int svc_port_is_privileged(struct sockaddr *sin)
 static void
 svc_tcp_accept(struct svc_sock *svsk)
 {
-	struct sockaddr_in sin;
+	struct sockaddr_storage addr;
+	struct sockaddr	*sin = (struct sockaddr *) &addr;
 	struct svc_serv	*serv = svsk->sk_server;
 	struct socket	*sock = svsk->sk_sock;
 	struct socket	*newsock;
@@ -987,8 +988,7 @@ svc_tcp_accept(struct svc_sock *svsk)
 	set_bit(SK_CONN, &svsk->sk_flags);
 	svc_sock_enqueue(svsk);
 
-	slen = sizeof(sin);
-	err = kernel_getpeername(newsock, (struct sockaddr *) &sin, &slen);
+	err = kernel_getpeername(newsock, sin, &slen);
 	if (err < 0) {
 		if (net_ratelimit())
 			printk(KERN_WARNING "%s: peername failed (err %d)!\n",
@@ -1000,16 +1000,14 @@ svc_tcp_accept(struct svc_sock *svsk)
 	 * hosts here, but when we get encryption, the IP of the host won't
 	 * tell us anything.  For now just warn about unpriv connections.
 	 */
-	if (!svc_port_is_privileged((struct sockaddr *) &sin)) {
+	if (!svc_port_is_privileged(sin)) {
 		dprintk(KERN_WARNING
 			"%s: connect from unprivileged port: %s\n",
 			serv->sv_name,
-			__svc_print_addr((struct sockaddr *) &sin, buf,
-								sizeof(buf)));
+			__svc_print_addr(sin, buf, sizeof(buf)));
 	}
 	dprintk("%s: connect from %s\n", serv->sv_name,
-		__svc_print_addr((struct sockaddr *) &sin, buf,
-				 sizeof(buf)));
+		__svc_print_addr(sin, buf, sizeof(buf)));
 
 	/* make sure that a write doesn't block forever when
 	 * low on memory
@@ -1019,7 +1017,7 @@ svc_tcp_accept(struct svc_sock *svsk)
 	if (!(newsvsk = svc_setup_socket(serv, newsock, &err,
 				 (SVC_SOCK_ANONYMOUS | SVC_SOCK_TEMPORARY))))
 		goto failed;
-	memcpy(&newsvsk->sk_remote, &sin, slen);
+	memcpy(&newsvsk->sk_remote, sin, slen);
 	newsvsk->sk_remotelen = slen;
 
 	svc_sock_received(newsvsk);