ctdb/server/ctdb_tunnel.c

   1 /*
   2    ctdb_tunnel protocol code
   3
   4    Copyright (C) Amitay Isaacs  2017
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "replace.h"
  21 #include "system/network.h"
  22
  23 #include <talloc.h>
  24 #include <tevent.h>
  25 #include <tdb.h>
  26
  27 #include "lib/util/debug.h"
  28
  29 #include "common/logging.h"
  30 #include "common/reqid.h"
  31 #include "common/srvid.h"
  32
  33 #include "ctdb_private.h"
  34
  35 int32_t ctdb_control_tunnel_register(struct ctdb_context *ctdb,
  36                                      uint32_t client_id, uint64_t tunnel_id)
  37 {
  38         struct ctdb_client *client;
  39         int ret;
  40
  41         client = reqid_find(ctdb->idr, client_id, struct ctdb_client);
  42         if (client == NULL) {
  43                 DEBUG(DEBUG_ERR, ("Bad client_id in ctdb_tunnel_register\n"));
  44                 return -1;
  45         }
  46
  47         ret = srvid_exists(ctdb->tunnels, tunnel_id, NULL);
  48         if (ret == 0) {
  49                 DEBUG(DEBUG_ERR,
  50                       ("Tunnel id 0x%"PRIx64" already registered\n",
  51                        tunnel_id));
  52                 return -1;
  53         }
  54
  55         ret = srvid_register(ctdb->tunnels, client, tunnel_id,
  56                              daemon_tunnel_handler, client);
  57         if (ret != 0) {
  58                 DEBUG(DEBUG_ERR,
  59                       ("Failed to register tunnel id 0x%"PRIx64"\n",
  60                        tunnel_id));
  61                 return -1;
  62         }
  63
  64         DEBUG(DEBUG_INFO, ("Registered tunnel for id 0x%"PRIx64"\n",
  65                            tunnel_id));
  66         return 0;
  67 }
  68
  69 int32_t ctdb_control_tunnel_deregister(struct ctdb_context *ctdb,
  70                                        uint32_t client_id, uint64_t tunnel_id)
  71 {
  72         struct ctdb_client *client;
  73         int ret;
  74
  75         client = reqid_find(ctdb->idr, client_id, struct ctdb_client);
  76         if (client == NULL) {
  77                 DEBUG(DEBUG_ERR, ("Bad client_id in ctdb_tunnel_deregister\n"));
  78                 return -1;
  79         }
  80
  81         ret = srvid_deregister(ctdb->tunnels, tunnel_id, client);
  82         if (ret != 0) {
  83                 DEBUG(DEBUG_ERR,
  84                       ("Failed to deregister tunnel id 0x%"PRIx64"\n",
  85                        tunnel_id));
  86                 return -1;
  87         }
  88
  89         return 0;
  90 }
  91
  92 int ctdb_daemon_send_tunnel(struct ctdb_context *ctdb, uint32_t destnode,
  93                             uint64_t tunnel_id, uint32_t flags, TDB_DATA data)
  94 {
  95         struct ctdb_req_tunnel_old *c;
  96         size_t len;
  97
  98         if (ctdb->methods == NULL) {
  99                 DEBUG(DEBUG_INFO,
 100                       ("Failed to send tunnel. Transport is DOWN\n"));
 101                 return -1;
 102         }
 103
 104         len = offsetof(struct ctdb_req_tunnel_old, data) + data.dsize;
 105         c = ctdb_transport_allocate(ctdb, ctdb, CTDB_REQ_TUNNEL, len,
 106                                     struct ctdb_req_tunnel_old);
 107         if (c == NULL) {
 108                 DEBUG(DEBUG_ERR,
 109                       ("Memory error in ctdb_daemon_send_tunnel()\n"));
 110                 return -1;
 111         }
 112
 113         c->hdr.destnode = destnode;
 114         c->tunnel_id = tunnel_id;
 115         c->flags = flags;
 116         c->datalen = data.dsize;
 117         memcpy(c->data, data.dptr, data.dsize);
 118
 119         ctdb_queue_packet(ctdb, &c->hdr);
 120
 121         talloc_free(c);
 122         return 0;
 123 }
 124
 125 void ctdb_request_tunnel(struct ctdb_context *ctdb,
 126                          struct ctdb_req_header *hdr)
 127 {
 128         struct ctdb_req_tunnel_old *c =
 129                 (struct ctdb_req_tunnel_old *)hdr;
 130         TDB_DATA data;
 131         int ret;
 132
 133         data.dsize = hdr->length;
 134         data.dptr = (uint8_t *)c;
 135
 136         ret = srvid_dispatch(ctdb->tunnels, c->tunnel_id, 0, data);
 137         if (ret != 0) {
 138                 DEBUG(DEBUG_ERR, ("Tunnel id 0x%"PRIx64" not registered\n",
 139                                   c->tunnel_id));
 140         }
 141 }