ns: Introduce collect_namespaces routine

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-dump.c

@@ -1799,7 +1799,7 @@ int cr_dump_tasks(pid_t pid)
 	if (collect_file_locks())
 		goto err;
 
-	if (collect_mnt_namespaces() < 0)
+	if (collect_namespaces() < 0)
 		goto err;
 
 	if (collect_sockets(pid))

include/namespaces.h

@@ -41,6 +41,7 @@ extern unsigned long root_ns_mask;
 extern const struct fdtype_ops nsfile_dump_ops;
 extern struct collect_image_info nsfile_cinfo;
 
+extern int collect_namespaces(void);
 extern int collect_mnt_namespaces(void);
 extern int dump_mnt_namespaces(void);
 extern int dump_namespaces(struct pstree_item *item, unsigned int ns_flags);

namespaces.c

@@ -528,6 +528,17 @@ int dump_namespaces(struct pstree_item *item, unsigned int ns_flags)
 	return 0;
 }
 
+int collect_namespaces(void)
+{
+	int ret;
+
+	ret = collect_mnt_namespaces();
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
 int prepare_namespace(struct pstree_item *item, unsigned long clone_flags)
 {
 	pid_t pid = item->pid.virt;