Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

[linux-2.6-omap-h63xx.git] / net / sunrpc / svcsock.c

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 3e65719f1ef698891d8e81ebea6c57e72b212717..a1951dcc577614df63fc0a3ab1e5ce92dce9d7ab 100644 (file)
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1114,6 +1114,7 @@ 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))) {
@@ -1146,6 +1147,18 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
        else
                svc_tcp_init(svsk, serv);
 
+       /*
+        * We start one listener per sv_serv.  We want AF_INET
+        * requests to be automatically shunted to our AF_INET6
+        * listener using a mapped IPv4 address.  Make sure
+        * no-one starts an equivalent IPv4 listener, which
+        * would steal our incoming connections.
+        */
+       val = 0;
+       if (serv->sv_family == AF_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);
 
@@ -1154,8 +1167,7 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
 
 int svc_addsock(struct svc_serv *serv,
                int fd,
-               char *name_return,
-               int *proto)
+               char *name_return)
 {
        int err = 0;
        struct socket *so = sockfd_lookup(fd, &err);
@@ -1171,7 +1183,11 @@ int svc_addsock(struct svc_serv *serv,
        else if (so->state > SS_UNCONNECTED)
                err = -EISCONN;
        else {
-               svsk = svc_setup_socket(serv, so, &err, SVC_SOCK_DEFAULTS);
+               if (!try_module_get(THIS_MODULE))
+                       err = -ENOENT;
+               else
+                       svsk = svc_setup_socket(serv, so, &err,
+                                               SVC_SOCK_DEFAULTS);
                if (svsk) {
                        struct sockaddr_storage addr;
                        struct sockaddr *sin = (struct sockaddr *)&addr;
@@ -1184,13 +1200,13 @@ int svc_addsock(struct svc_serv *serv,
                        spin_unlock_bh(&serv->sv_lock);
                        svc_xprt_received(&svsk->sk_xprt);
                        err = 0;
-               }
+               } else
+                       module_put(THIS_MODULE);
        }
        if (err) {
                sockfd_put(so);
                return err;
        }
-       if (proto) *proto = so->sk->sk_protocol;
        return one_sock_name(name_return, svsk);
 }
 EXPORT_SYMBOL_GPL(svc_addsock);