bgpd/bgp_labelpool.h

   1 /*
   2  * BGP Label Pool - Manage label chunk allocations from zebra asynchronously
   3  *
   4  * Copyright (C) 2018 LabN Consulting, L.L.C.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _FRR_BGP_LABELPOOL_H
  22 #define _FRR_BGP_LABELPOOL_H
  23
  24 #include <zebra.h>
  25
  26 #include "mpls.h"
  27
  28 /*
  29  * Types used in bgp_lp_get for debug tracking; add more as needed
  30  */
  31 #define LP_TYPE_VRF     0x00000001
  32
  33 struct labelpool {
  34         struct skiplist         *ledger;        /* all requests */
  35         struct skiplist         *inuse;         /* individual labels */
  36         struct list             *chunks;        /* granted by zebra */
  37         struct lp_fifo          *requests;      /* blocked on zebra */
  38         struct work_queue       *callback_q;
  39         uint32_t                pending_count;  /* requested from zebra */
  40 };
  41
  42 extern void bgp_lp_init(struct thread_master *master, struct labelpool *pool);
  43 extern void bgp_lp_finish(void);
  44 extern void bgp_lp_get(int type, void *labelid,
  45         int (*cbfunc)(mpls_label_t label, void *labelid, bool allocated));
  46 extern void bgp_lp_release(int type, void *labelid, mpls_label_t label);
  47 extern void bgp_lp_event_chunk(uint8_t keep, uint32_t first, uint32_t last);
  48 extern void bgp_lp_event_zebra_down(void);
  49 extern void bgp_lp_event_zebra_up(void);
  50
  51 #endif /* _FRR_BGP_LABELPOOL_H */