ctdb/server/ipalloc.h

   1 /*
   2    CTDB IP takeover code
   3
   4    Copyright (C) Ronnie Sahlberg  2007
   5    Copyright (C) Andrew Tridgell  2007
   6    Copyright (C) Martin Schwenke  2015
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #ifndef __CTDB_IPALLOC_H__
  23 #define __CTDB_IPALLOC_H__
  24
  25 #include <talloc.h>
  26
  27 #include "replace.h"
  28 #include "system/network.h"
  29
  30 #include "lib/util/bitmap.h"
  31
  32 struct public_ip_list {
  33         struct public_ip_list *next;
  34         uint32_t pnn;
  35         ctdb_sock_addr addr;
  36         struct bitmap *known_on;
  37         struct bitmap *available_on;
  38 };
  39
  40 #define IP_KEYLEN       4
  41 uint32_t *ip_key(ctdb_sock_addr *ip);
  42
  43 /* Flags used in IP allocation algorithms. */
  44 enum ipalloc_algorithm {
  45         IPALLOC_DETERMINISTIC,
  46         IPALLOC_NONDETERMINISTIC,
  47         IPALLOC_LCP2,
  48 };
  49
  50 struct ipalloc_state;
  51
  52 struct ipalloc_state * ipalloc_state_init(TALLOC_CTX *mem_ctx,
  53                                           uint32_t num_nodes,
  54                                           enum ipalloc_algorithm algorithm,
  55                                           bool no_ip_takeover,
  56                                           bool no_ip_failback,
  57                                           uint32_t *force_rebalance_nodes);
  58
  59 void ipalloc_set_public_ips(struct ipalloc_state *ipalloc_state,
  60                             struct ctdb_public_ip_list *known_ips,
  61                             struct ctdb_public_ip_list *available_ips);
  62
  63 bool ipalloc_can_host_ips(struct ipalloc_state *ipalloc_state);
  64
  65 struct public_ip_list *ipalloc(struct ipalloc_state *ipalloc_state);
  66
  67 #endif /* __CTDB_IPALLOC_H__ */