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.h>
  26 #include "lib/util/tdb_wrap.h"
  27 #include "system/filesys.h"
  28 #include "param/param.h"
  29 #include "librpc/gen_ndr/server_id4.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 id, uint32_t id2)
  35 {
  36         struct server_id server_id;
  37         ZERO_STRUCT(server_id);
  38         server_id.id = id;
  39         server_id.id2 = id2;
  40         return server_id;
  41 }
  42
  43
  44 /*
  45   return a server_id as a string
  46 */
  47 static const char *local_id_string(struct cluster_ops *ops,
  48                                    TALLOC_CTX *mem_ctx, struct server_id id)
  49 {
  50         return talloc_asprintf(mem_ctx, "%u.%llu.%u", id.node, (unsigned long long)id.id, id.id2);
  51 }
  52
  53
  54 /*
  55   open a tmp tdb for the local node. By using smbd_tmp_path() we don't need
  56   TDB_CLEAR_IF_FIRST as the tmp path is wiped at startup
  57 */
  58 static struct tdb_wrap *local_tdb_tmp_open(struct cluster_ops *ops,
  59                                            TALLOC_CTX *mem_ctx,
  60                                            struct loadparm_context *lp_ctx,
  61                                            const char *dbname, int flags)
  62 {
  63         char *path = smbd_tmp_path(mem_ctx, lp_ctx, dbname);
  64         struct tdb_wrap *w;
  65         w = tdb_wrap_open(mem_ctx, path, 0, flags,
  66                           O_RDWR|O_CREAT, 0600);
  67         talloc_free(path);
  68         return w;
  69 }
  70
  71 /*
  72   dummy backend handle function
  73 */
  74 static void *local_backend_handle(struct cluster_ops *ops)
  75 {
  76         return NULL;
  77 }
  78
  79 /*
  80   dummy message init function - not needed as all messages are local
  81 */
  82 static NTSTATUS local_message_init(struct cluster_ops *ops,
  83                                    struct messaging_context *msg,
  84                                    struct server_id server,
  85                                    cluster_message_fn_t handler)
  86 {
  87         return NT_STATUS_OK;
  88 }
  89
  90 /*
  91   dummy message send
  92 */
  93 static NTSTATUS local_message_send(struct cluster_ops *ops,
  94                                    struct server_id server, DATA_BLOB *data)
  95 {
  96         return NT_STATUS_INVALID_DEVICE_REQUEST;
  97 }
  98
  99 static struct cluster_ops cluster_local_ops = {
 100         .cluster_id           = local_id,
 101         .cluster_id_string    = local_id_string,
 102         .cluster_tdb_tmp_open = local_tdb_tmp_open,
 103         .backend_handle       = local_backend_handle,
 104         .message_init         = local_message_init,
 105         .message_send         = local_message_send,
 106         .private_data         = NULL
 107 };
 108
 109 void cluster_local_init(void)
 110 {
 111         cluster_set_ops(&cluster_local_ops);
 112 }
 113