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 "replace.h"
  26 #include "system/network.h"
  27
  28 #include "include/ctdb_protocol.h"
  29
  30 struct public_ip_list {
  31         struct public_ip_list *next;
  32         uint32_t pnn;
  33         ctdb_sock_addr addr;
  34 };
  35
  36 #define IP_KEYLEN       4
  37 uint32_t *ip_key(ctdb_sock_addr *ip);
  38
  39 /* Flags used in IP allocation algorithms. */
  40 enum ipalloc_algorithm {
  41         IPALLOC_DETERMINISTIC,
  42         IPALLOC_NONDETERMINISTIC,
  43         IPALLOC_LCP2,
  44 };
  45
  46 struct ipalloc_state {
  47         uint32_t num;
  48
  49         /* Arrays with data for each node */
  50         struct ctdb_public_ip_list_old **known_public_ips;
  51         struct ctdb_public_ip_list_old **available_public_ips;
  52         bool *noiptakeover;
  53         bool *noiphost;
  54
  55         struct public_ip_list *all_ips;
  56         enum ipalloc_algorithm algorithm;
  57         uint32_t no_ip_failback;
  58         uint32_t *force_rebalance_nodes;
  59 };
  60
  61 bool ipalloc(struct ipalloc_state *ipalloc_state);
  62
  63 #endif /* __CTDB_IPALLOC_H__ */