source4/cluster/local.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    local (dummy) clustering operations
   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 "tdb_compat.h"
  26 #include "lib/util/tdb_wrap.h"
  27 #include "system/filesys.h"
  28 #include "param/param.h"
  29 #include "librpc/gen_ndr/server_id.h"
  30
  31 /*
  32   server a server_id for the local node
  33 */
  34 static struct server_id local_id(struct cluster_ops *ops, uint64_t pid, uint32_t task_id)
  35 {
  36         struct server_id server_id;
  37         ZERO_STRUCT(server_id);
  38         server_id.pid = pid;
  39         server_id.task_id = task_id;
  40         return server_id;
  41 }
  42
  43
  44 /*
  45   open a tmp tdb for the local node. By using smbd_tmp_path() we don't need
  46   TDB_CLEAR_IF_FIRST as the tmp path is wiped at startup
  47 */
  48 static struct tdb_wrap *local_tdb_tmp_open(struct cluster_ops *ops,
  49                                            TALLOC_CTX *mem_ctx,
  50                                            struct loadparm_context *lp_ctx,
  51                                            const char *dbname, int flags)
  52 {
  53         char *path = smbd_tmp_path(mem_ctx, lp_ctx, dbname);
  54         struct tdb_wrap *w;
  55         w = tdb_wrap_open(mem_ctx, path, 0, flags,
  56                           O_RDWR|O_CREAT, 0600, lp_ctx);
  57         talloc_free(path);
  58         return w;
  59 }
  60
  61 /*
  62   dummy backend handle function
  63 */
  64 static void *local_backend_handle(struct cluster_ops *ops)
  65 {
  66         return NULL;
  67 }
  68
  69 /*
  70   dummy message init function - not needed as all messages are local
  71 */
  72 static NTSTATUS local_message_init(struct cluster_ops *ops,
  73                                    struct imessaging_context *msg,
  74                                    struct server_id server,
  75                                    cluster_message_fn_t handler)
  76 {
  77         return NT_STATUS_OK;
  78 }
  79
  80 /*
  81   dummy message send
  82 */
  83 static NTSTATUS local_message_send(struct cluster_ops *ops,
  84                                    struct server_id server, DATA_BLOB *data)
  85 {
  86         return NT_STATUS_INVALID_DEVICE_REQUEST;
  87 }
  88
  89 static struct cluster_ops cluster_local_ops = {
  90         .cluster_id           = local_id,
  91         .cluster_tdb_tmp_open = local_tdb_tmp_open,
  92         .backend_handle       = local_backend_handle,
  93         .message_init         = local_message_init,
  94         .message_send         = local_message_send,
  95         .private_data         = NULL
  96 };
  97
  98 void cluster_local_init(void)
  99 {
 100         cluster_set_ops(&cluster_local_ops);
 101 }
 102