Merge pull request #835 from mmichal10/composite-improvements

Composite improvements

inc/ocf_composite_volume.h

@@ -1,5 +1,6 @@
 /*
  * Copyright(c) 2022 Intel Corporation
+ * Copyright(c) 2024 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -54,4 +55,19 @@ int ocf_composite_volume_add(ocf_composite_volume_t cvolume,
 		ocf_volume_type_t type, struct ocf_volume_uuid *uuid,
 		void *volume_params);
 
+typedef int (*ocf_composite_volume_member_visitor_t)(ocf_volume_t subvolume,
+		void *priv);
+
+/**
+ * @brief Call @visitor on every valid member of composite volume
+ *
+ * @param[in] cvolume composite volume handle
+ * @param[in] visitor function callback
+ * @param[in] priv pointer to be passed to the callback
+ *
+ * @return subvolume in composite volume
+ */
+int ocf_composite_volume_member_visit(ocf_composite_volume_t cvolume,
+		ocf_composite_volume_member_visitor_t visitor, void *priv);
+
 #endif /* __OCF_COMPOSITE_VOLUME_H__ */

src/ocf_composite_volume.c

@@ -393,3 +393,19 @@ int ocf_composite_volume_add(ocf_composite_volume_t cvolume,
 
 	return 0;
 }
+
+int ocf_composite_volume_member_visit(ocf_composite_volume_t cvolume,
+		ocf_composite_volume_member_visitor_t visitor, void *priv)
+{
+	struct ocf_composite_volume *composite = ocf_volume_get_priv(cvolume);
+	int i;
+	int res;
+
+	for (i = 0 ; i < composite->members_cnt; i++) {
+		res = visitor(&composite->member[i].volume, priv);
+		if (res != 0)
+			return res;
+	}
+
+	return 0;
+}

src/ocf_volume_priv.h

@@ -29,7 +29,10 @@ struct ocf_volume {
 			/* true if reading discarded pages returns 0 */
 	} features;
 	bool opened;
+
 	bool uuid_copy;
+	/* @brief True if OCF shall free UUID on volume deinit */
+
 	void *priv;
 	ocf_cache_t cache;
 	struct list_head core_pool_item;