zebra: add table manager files

[mirror_frr.git] / zebra / table_manager.h

diff --git a/zebra/table_manager.h b/zebra/table_manager.h
new file mode 100644 (file)
index 0000000..527d5c2
--- /dev/null
+++ b/zebra/table_manager.h
@@ -0,0 +1,63 @@
+/* zebra table Manager for routing table identifier management
+ * Copyright (C) 2018 6WIND
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _TABLE_MANAGER_H
+#define _TABLE_MANAGER_H
+
+#include <stdint.h>
+
+#include "lib/linklist.h"
+#include "lib/thread.h"
+
+/*
+ * Table chunk struct
+ * Client daemon which the chunk belongs to can be identified by either
+ * proto (daemon protocol) + instance + VRF.
+ * If the client then passes a non-empty value to keep field when it requests
+ * for chunks, the chunks won't be garbage collected and the client will be
+ * responsible of its release.
+ * Otherwise, if the keep field is not set (value 0) for the chunk, it will be
+ * automatically released when the client disconnects or when it reconnects
+ * (in case it died unexpectedly, we can know it's the same because it will have
+ * the same proto and instance values)
+ */
+struct table_manager_chunk {
+       vrf_id_t vrf_id;
+       uint8_t proto;
+       uint16_t instance;
+       uint32_t start; /* First table RT ID of the chunk */
+       uint32_t end;   /* Last table RT ID of the chunk */
+};
+
+/*
+ * Main table manager struct
+ * Holds a linked list of table chunks.
+ */
+struct table_manager {
+       struct list *lc_list;
+};
+
+void table_manager_enable(ns_id_t ns_id);
+struct table_manager_chunk *assign_table_chunk(uint8_t proto, uint16_t instance,
+                                              uint32_t size);
+int release_table_chunk(uint8_t proto, uint16_t instance, uint32_t start,
+                       uint32_t end);
+int release_daemon_table_chunks(uint8_t proto, uint16_t instance);
+void table_manager_disable(ns_id_t ns_id);
+
+#endif /* _TABLE_MANAGER_H */