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 #include "librpc/gen_ndr/server_id.h"
  27
  28 static struct cluster_ops *ops;
  29
  30 /* set cluster operations */
  31 void cluster_set_ops(struct cluster_ops *new_ops)
  32 {
  33         ops = new_ops;
  34 }
  35
  36 /*
  37   an ugly way of getting at the backend handle (eg. ctdb context) via the cluster API
  38 */
  39 void *cluster_backend_handle(void)
  40 {
  41         return ops->backend_handle(ops);
  42 }
  43
  44 /* by default use the local ops */
  45 static void cluster_init(void)
  46 {
  47         if (ops == NULL) cluster_local_init();
  48 }
  49
  50 /*
  51   create a server_id for the local node
  52 */
  53 struct server_id cluster_id(uint64_t pid, uint32_t task_id)
  54 {
  55         cluster_init();
  56         return ops->cluster_id(ops, pid, task_id);
  57 }
  58
  59 /*
  60   open a temporary tdb in a cluster friendly manner
  61 */
  62 struct db_context *cluster_db_tmp_open(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx, const char *dbbase, int flags)
  63 {
  64         cluster_init();
  65         return ops->cluster_db_tmp_open(ops, mem_ctx, lp_ctx, dbbase, flags);
  66 }
  67
  68
  69 /*
  70   register a callback function for a messaging endpoint
  71 */
  72 NTSTATUS cluster_message_init(struct imessaging_context *msg, struct server_id server,
  73                               cluster_message_fn_t handler)
  74 {
  75         cluster_init();
  76         return ops->message_init(ops, msg, server, handler);
  77 }
  78
  79 /*
  80   send a message to another node in the cluster
  81 */
  82 NTSTATUS cluster_message_send(struct server_id server, DATA_BLOB *data)
  83 {
  84         cluster_init();
  85         return ops->message_send(ops, server, data);
  86 }