nfs admin: add the admin type for nfs

Signed-off-by: John Mulligan <jmulligan@redhat.com>

common/admin/nfs/admin.go

@@ -0,0 +1,21 @@
+//go:build !(nautilus || octopus) && ceph_preview && ceph_ci_untested
+// +build !nautilus,!octopus,ceph_preview,ceph_ci_untested
+
+package nfs
+
+import (
+	ccom "github.com/ceph/go-ceph/common/commands"
+)
+
+// Admin is used to administer ceph nfs features.
+type Admin struct {
+	conn ccom.RadosCommander
+}
+
+// NewFromConn creates an new management object from a preexisting
+// rados connection. The existing connection can be rados.Conn or any
+// type implementing the RadosCommander interface.
+//  PREVIEW
+func NewFromConn(conn ccom.RadosCommander) *Admin {
+	return &Admin{conn}
+}