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 id, uint32_t id2)
  54 {
  55         cluster_init();
  56         return ops->cluster_id(ops, id, id2);
  57 }
  58
  59
  60 /*
  61   return a server_id as a string
  62 */
  63 const char *cluster_id_string(TALLOC_CTX *mem_ctx, struct server_id id)
  64 {
  65         cluster_init();
  66         return ops->cluster_id_string(ops, mem_ctx, id);
  67 }
  68
  69
  70 /*
  71   open a temporary tdb in a cluster friendly manner
  72 */
  73 struct tdb_wrap *cluster_tdb_tmp_open(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx, const char *dbname, int flags)
  74 {
  75         cluster_init();
  76         return ops->cluster_tdb_tmp_open(ops, mem_ctx, lp_ctx, dbname, flags);
  77 }
  78
  79
  80 /*
  81   register a callback function for a messaging endpoint
  82 */
  83 NTSTATUS cluster_message_init(struct messaging_context *msg, struct server_id server,
  84                               cluster_message_fn_t handler)
  85 {
  86         cluster_init();
  87         return ops->message_init(ops, msg, server, handler);
  88 }
  89
  90 /*
  91   send a message to another node in the cluster
  92 */
  93 NTSTATUS cluster_message_send(struct server_id server, DATA_BLOB *data)
  94 {
  95         cluster_init();
  96         return ops->message_send(ops, server, data);
  97 }