SUNRPC: introduce svc helpers for prepairing rpcbind infrastructure

This helpers will be used only for those services, that will send portmapper
registration calls.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 6a69a1131fb7..d2d61bfa3306 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -354,6 +354,41 @@ svc_pool_for_cpu(struct svc_serv *serv, int cpu)
         return &serv->sv_pools[pidx % serv->sv_nrpools];
 }
 
+static int svc_rpcb_setup(struct svc_serv *serv)
+{
+        int err;
+
+        err = rpcb_create_local();
+        if (err)
+                return err;
+
+        /* Remove any stale portmap registrations */
+        svc_unregister(serv);
+        return 0;
+}
+
+static void svc_rpcb_cleanup(struct svc_serv *serv)
+{
+        svc_unregister(serv);
+        rpcb_put_local();
+}
+
+static int svc_uses_rpcbind(struct svc_serv *serv)
+{
+        struct svc_program      *progp;
+        unsigned int            i;
+
+        for (progp = serv->sv_program; progp; progp = progp->pg_next) {
+                for (i = 0; i < progp->pg_nvers; i++) {
+                        if (progp->pg_vers[i] == NULL)
+                                continue;
+                        if (progp->pg_vers[i]->vs_hidden == 0)
+                                return 1;
+                }
+        }
+
+        return 0;
+}
 
 /*
  * Create an RPC service