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 "dbwrap/dbwrap.h"
  26 #include "system/filesys.h"
  27 #include "param/param.h"
  28 #include "librpc/gen_ndr/server_id.h"
  29
  30 /*
  31   server a server_id for the local node
  32 */
  33 static struct server_id local_id(struct cluster_ops *ops, uint64_t pid, uint32_t task_id)
  34 {
  35         struct server_id server_id;
  36         ZERO_STRUCT(server_id);
  37         server_id.pid = pid;
  38         server_id.task_id = task_id;
  39         server_id.vnn = NONCLUSTER_VNN;
  40         /* This is because we are not in the s3 serverid database */
  41         server_id.unique_id = SERVERID_UNIQUE_ID_NOT_TO_VERIFY;
  42         return server_id;
  43 }
  44
  45
  46 /*
  47   open a tmp tdb for the local node. By using smbd_tmp_path() we don't need
  48   TDB_CLEAR_IF_FIRST as the tmp path is wiped at startup
  49 */
  50 static struct db_context *local_db_tmp_open(struct cluster_ops *ops,
  51                                             TALLOC_CTX *mem_ctx,
  52                                             struct loadparm_context *lp_ctx,
  53                                             const char *dbbase, int flags)
  54 {
  55         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
  56         char *path, *dbname;
  57         struct db_context *db;
  58
  59         dbname = talloc_asprintf(mem_ctx, "%s.tdb", dbbase);
  60
  61         path = smbd_tmp_path(tmp_ctx, lp_ctx, dbname);
  62         db = dbwrap_local_open(mem_ctx, lp_ctx, path, 0, flags, O_RDWR|O_CREAT,
  63                                0600, DBWRAP_LOCK_ORDER_NONE, DBWRAP_FLAG_NONE);
  64         talloc_free(tmp_ctx);
  65         return db;
  66 }
  67
  68 /*
  69   dummy backend handle function
  70 */
  71 static void *local_backend_handle(struct cluster_ops *ops)
  72 {
  73         return NULL;
  74 }
  75
  76 /*
  77   dummy message init function - not needed as all messages are local
  78 */
  79 static NTSTATUS local_message_init(struct cluster_ops *ops,
  80                                    struct imessaging_context *msg,
  81                                    struct server_id server,
  82                                    cluster_message_fn_t handler)
  83 {
  84         return NT_STATUS_OK;
  85 }
  86
  87 /*
  88   dummy message send
  89 */
  90 static NTSTATUS local_message_send(struct cluster_ops *ops,
  91                                    struct server_id server, DATA_BLOB *data)
  92 {
  93         return NT_STATUS_INVALID_DEVICE_REQUEST;
  94 }
  95
  96 static struct cluster_ops cluster_local_ops = {
  97         .cluster_id           = local_id,
  98         .cluster_db_tmp_open  = local_db_tmp_open,
  99         .backend_handle       = local_backend_handle,
 100         .message_init         = local_message_init,
 101         .message_send         = local_message_send,
 102         .private_data         = NULL
 103 };
 104
 105 void cluster_local_init(void)
 106 {
 107         cluster_set_ops(&cluster_local_ops);
 108 }
 109