bgpd/bgp_labelpool.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * BGP Label Pool - Manage label chunk allocations from zebra asynchronously
   4  *
   5  * Copyright (C) 2018 LabN Consulting, L.L.C.
   6  */
   7
   8 #ifndef _FRR_BGP_LABELPOOL_H
   9 #define _FRR_BGP_LABELPOOL_H
  10
  11 #include <zebra.h>
  12
  13 #include "mpls.h"
  14
  15 /*
  16  * Types used in bgp_lp_get for debug tracking; add more as needed
  17  */
  18 #define LP_TYPE_VRF     0x00000001
  19 #define LP_TYPE_BGP_LU  0x00000002
  20
  21 PREDECL_LIST(lp_fifo);
  22
  23 struct labelpool {
  24         struct skiplist         *ledger;        /* all requests */
  25         struct skiplist         *inuse;         /* individual labels */
  26         struct list             *chunks;        /* granted by zebra */
  27         struct lp_fifo_head     requests;       /* blocked on zebra */
  28         struct work_queue       *callback_q;
  29         uint32_t                pending_count;  /* requested from zebra */
  30         uint32_t reconnect_count;               /* zebra reconnections */
  31         uint32_t next_chunksize;                /* request this many labels */
  32 };
  33
  34 extern void bgp_lp_init(struct event_loop *master, struct labelpool *pool);
  35 extern void bgp_lp_finish(void);
  36 extern void bgp_lp_get(int type, void *labelid,
  37         int (*cbfunc)(mpls_label_t label, void *labelid, bool allocated));
  38 extern void bgp_lp_release(int type, void *labelid, mpls_label_t label);
  39 extern void bgp_lp_event_chunk(uint8_t keep, uint32_t first, uint32_t last);
  40 extern void bgp_lp_event_zebra_down(void);
  41 extern void bgp_lp_event_zebra_up(void);
  42 extern void bgp_lp_vty_init(void);
  43
  44 #endif /* _FRR_BGP_LABELPOOL_H */