zebra/table_manager.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* zebra table Manager for routing table identifier management
   3  * Copyright (C) 2018 6WIND
   4  */
   5
   6 #ifndef _TABLE_MANAGER_H
   7 #define _TABLE_MANAGER_H
   8
   9 #include <stdint.h>
  10
  11 #include "lib/linklist.h"
  12 #include "frrevent.h"
  13 #include "lib/ns.h"
  14
  15 #include "zebra/zserv.h"
  16
  17 #ifdef __cplusplus
  18 extern "C" {
  19 #endif
  20
  21 /*
  22  * Table chunk struct
  23  * Client daemon which the chunk belongs to can be identified by either
  24  * proto (daemon protocol) + instance + VRF.
  25  * If the client then passes a non-empty value to keep field when it requests
  26  * for chunks, the chunks won't be garbage collected and the client will be
  27  * responsible of its release.
  28  * Otherwise, if the keep field is not set (value 0) for the chunk, it will be
  29  * automatically released when the client disconnects or when it reconnects
  30  * (in case it died unexpectedly, we can know it's the same because it will have
  31  * the same proto and instance values)
  32  */
  33 struct table_manager_chunk {
  34         vrf_id_t vrf_id;
  35         uint8_t proto;
  36         uint16_t instance;
  37         uint32_t start; /* First table RT ID of the chunk */
  38         uint32_t end;   /* Last table RT ID of the chunk */
  39 };
  40
  41 /*
  42  * Main table manager struct
  43  * Holds a linked list of table chunks.
  44  */
  45 struct table_manager {
  46         struct list *lc_list;
  47         uint32_t start;
  48         uint32_t end;
  49 };
  50
  51 void table_manager_enable(struct zebra_vrf *zvrf);
  52 struct table_manager_chunk *assign_table_chunk(uint8_t proto, uint16_t instance,
  53                                                uint32_t size,
  54                                                struct zebra_vrf *zvrf);
  55 int release_table_chunk(uint8_t proto, uint16_t instance, uint32_t start,
  56                         uint32_t end, struct zebra_vrf *zvrf);
  57 int release_daemon_table_chunks(struct zserv *client);
  58 void table_manager_disable(struct zebra_vrf *zvrf);
  59 int table_manager_range(struct vty *vty, bool add, struct zebra_vrf *zvrf,
  60                         const char *min, const char *max);
  61
  62 #ifdef __cplusplus
  63 }
  64 #endif
  65
  66 #endif /* _TABLE_MANAGER_H */