sunrpc: turn warn_gssd() log message into a dprintk()

The original printk() made sense when the GSSAPI codepaths were called
only when sec=krb5* was explicitly requested. Now however, in many cases
the nfs client will try to acquire GSSAPI credentials by default, even
when it's not requested.

Since we don't have a great mechanism to distinguish between the two
cases, just turn the pr_warn into a dprintk instead. With this change we
can also get rid of the ratelimiting.

We do need to keep the EXPORT_SYMBOL(gssd_running) in place since
auth_gss.ko needs it and sunrpc.ko provides it. We can however,
eliminate the gssd_running call in the nfs code since that's a bit of a
layering violation.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/nfs4client.c

@@ -372,10 +372,7 @@ struct nfs_client *nfs4_init_client(struct nfs_client *clp,
 	__set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
 	__set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags);
 
-	error = -EINVAL;
-	if (gssd_running(clp->cl_net))
-		error = nfs_create_rpc_client(clp, timeparms,
-					      RPC_AUTH_GSS_KRB5I);
+	error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I);
 	if (error == -EINVAL)
 		error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
 	if (error < 0)

net/sunrpc/auth_gss/auth_gss.c

@@ -532,13 +532,7 @@ gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred)
 
 static void warn_gssd(void)
 {
-	static unsigned long ratelimit;
-	unsigned long now = jiffies;
-
-	if (time_after(now, ratelimit)) {
-		pr_warn("RPC: AUTH_GSS upcall failed. Please check user daemon is running.\n");
-		ratelimit = now + 15*HZ;
-	}
+	dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n");
 }
 
 static inline int