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         int hash_size, tdb_flags;
  59
  60         dbname = talloc_asprintf(mem_ctx, "%s.tdb", dbbase);
  61
  62         path = smbd_tmp_path(tmp_ctx, lp_ctx, dbname);
  63
  64         hash_size = lpcfg_tdb_hash_size(lp_ctx, path);
  65         tdb_flags = lpcfg_tdb_flags(lp_ctx, flags);
  66
  67         db = dbwrap_local_open(
  68                 mem_ctx,
  69                 path,
  70                 hash_size,
  71                 tdb_flags,
  72                 O_RDWR|O_CREAT,
  73                 0600,
  74                 DBWRAP_LOCK_ORDER_NONE,
  75                 DBWRAP_FLAG_NONE);
  76         talloc_free(tmp_ctx);
  77         return db;
  78 }
  79
  80 /*
  81   dummy backend handle function
  82 */
  83 static void *local_backend_handle(struct cluster_ops *ops)
  84 {
  85         return NULL;
  86 }
  87
  88 /*
  89   dummy message init function - not needed as all messages are local
  90 */
  91 static NTSTATUS local_message_init(struct cluster_ops *ops,
  92                                    struct imessaging_context *msg,
  93                                    struct server_id server,
  94                                    cluster_message_fn_t handler)
  95 {
  96         return NT_STATUS_OK;
  97 }
  98
  99 /*
 100   dummy message send
 101 */
 102 static NTSTATUS local_message_send(struct cluster_ops *ops,
 103                                    struct server_id server, DATA_BLOB *data)
 104 {
 105         return NT_STATUS_INVALID_DEVICE_REQUEST;
 106 }
 107
 108 static struct cluster_ops cluster_local_ops = {
 109         .cluster_id           = local_id,
 110         .cluster_db_tmp_open  = local_db_tmp_open,
 111         .backend_handle       = local_backend_handle,
 112         .message_init         = local_message_init,
 113         .message_send         = local_message_send,
 114         .private_data         = NULL
 115 };
 116
 117 void cluster_local_init(void)
 118 {
 119         cluster_set_ops(&cluster_local_ops);
 120 }
 121