fix flow for plugin check

Signed-off-by: Michael Zappa <[email protected]>

opts.go

@@ -316,16 +316,15 @@ func loadFromConfDir(c *libcni, max int) error {
 }
 
 func checkPluginExists(c *libcni, confList *cnilibrary.NetworkConfigList) error {
-	for _, dir := range c.pluginDirs {
-		for _, plug := range confList.Plugins {
-			plugin := plug.Network.Type
-
-			if fileExistsInDir(dir, plugin) {
-				return nil
+	for _, plug := range confList.Plugins {
+		plugin := plug.Network.Type
+		for _, dir := range c.pluginDirs {
+			if !fileExistsInDir(dir, plugin) {
+				return fmt.Errorf("plugin %s not found in: %s %v", plugin, strings.Join(c.pluginDirs, ","), ErrCNIPluginNotFound)
 			}
 		}
 	}
-	return ErrCNIPluginNotFound
+	return nil
 }
 
 // FileExistsInDir checks if a file exists in a specific directory