source4/cluster/cluster.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    core clustering code
   5
   6    Copyright (C) Andrew Tridgell 2006
   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 #include "includes.h"
  23 #include "cluster/cluster.h"
  24 #include "cluster/cluster_private.h"
  25 #include "librpc/gen_ndr/misc.h"
  26
  27 static struct cluster_ops *ops;
  28
  29 /* set cluster operations */
  30 void cluster_set_ops(struct cluster_ops *new_ops)
  31 {
  32         ops = new_ops;
  33 }
  34
  35 /*
  36   an ugly way of getting at the backend handle (eg. ctdb context) via the cluster API
  37 */
  38 void *cluster_backend_handle(void)
  39 {
  40         return ops->backend_handle(ops);
  41 }
  42
  43 /* by default use the local ops */
  44 static void cluster_init(void)
  45 {
  46         if (ops == NULL) cluster_local_init();
  47 }
  48
  49 /*
  50   create a server_id for the local node
  51 */
  52 struct server_id cluster_id(uint64_t id, uint32_t id2)
  53 {
  54         cluster_init();
  55         return ops->cluster_id(ops, id, id2);
  56 }
  57
  58
  59 /*
  60   return a server_id as a string
  61 */
  62 const char *cluster_id_string(TALLOC_CTX *mem_ctx, struct server_id id)
  63 {
  64         cluster_init();
  65         return ops->cluster_id_string(ops, mem_ctx, id);
  66 }
  67
  68
  69 /*
  70   open a temporary tdb in a cluster friendly manner
  71 */
  72 struct tdb_wrap *cluster_tdb_tmp_open(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx, const char *dbname, int flags)
  73 {
  74         cluster_init();
  75         return ops->cluster_tdb_tmp_open(ops, mem_ctx, lp_ctx, dbname, flags);
  76 }
  77
  78
  79 /*
  80   register a callback function for a messaging endpoint
  81 */
  82 NTSTATUS cluster_message_init(struct messaging_context *msg, struct server_id server,
  83                               cluster_message_fn_t handler)
  84 {
  85         cluster_init();
  86         return ops->message_init(ops, msg, server, handler);
  87 }
  88
  89 /*
  90   send a message to another node in the cluster
  91 */
  92 NTSTATUS cluster_message_send(struct server_id server, DATA_BLOB *data)
  93 {
  94         cluster_init();
  95         return ops->message_send(ops, server, data);
  96 }