Updates to resolve issues identified by gosec (#330)

* Updates to resolve issues identified by gosec

internal/containerruntime/runtime.go

@@ -13,7 +13,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
-package runtime
+package containerruntime
 
 import (
 	"fmt"
@@ -107,3 +107,22 @@ func GetKernelVersion() (string, error) {
 func GetMaxFileHandles() (string, error) {
 	return readProc("/proc/sys/fs/file-max")
 }
+
+// SupportedFilesystem returns true if the supplied filesystem type is supported for MQ data
+func SupportedFilesystem(fsType string) bool {
+	switch fsType {
+	case "aufs", "overlayfs", "tmpfs":
+		return false
+	default:
+		return true
+	}
+}
+
+// ValidMultiInstanceFilesystem returns true if the supplied filesystem type is valid for a multi-instance queue manager
+func ValidMultiInstanceFilesystem(fsType string) bool {
+	if !SupportedFilesystem(fsType) {
+		return false
+	}
+	// TODO : check for non-shared filesystems & shared filesystems which are known not to work
+	return true
+}