ctdb/client/client_util.c

   1 /*
   2    CTDB client code
   3
   4    Copyright (C) Amitay Isaacs  2015
   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 #include "system/filesys.h"
  23
  24 #include <talloc.h>
  25 #include <tevent.h>
  26 #include <tdb.h>
  27
  28 #include "common/logging.h"
  29
  30 #include "lib/util/debug.h"
  31
  32 #include "protocol/protocol.h"
  33 #include "protocol/protocol_api.h"
  34 #include "client/client_private.h"
  35 #include "client/client.h"
  36 #include "client/client_sync.h"
  37
  38 int list_of_nodes(struct ctdb_node_map *nodemap,
  39                   uint32_t flags_mask, uint32_t exclude_pnn,
  40                   TALLOC_CTX *mem_ctx, uint32_t **pnn_list)
  41 {
  42         int num_nodes = 0;
  43         uint32_t *list;
  44         unsigned int i;
  45
  46         /* Allocate the list of same number of nodes */
  47         list = talloc_array(mem_ctx, uint32_t, nodemap->num);
  48         if (list == NULL) {
  49                 return -1;
  50         }
  51
  52         for (i=0; i<nodemap->num; i++) {
  53                 if (nodemap->node[i].flags & flags_mask) {
  54                         continue;
  55                 }
  56                 if (nodemap->node[i].pnn == exclude_pnn) {
  57                         continue;
  58                 }
  59                 list[num_nodes] = nodemap->node[i].pnn;
  60                 num_nodes++;
  61         }
  62
  63         *pnn_list = list;
  64         return num_nodes;
  65 }
  66
  67 int list_of_active_nodes(struct ctdb_node_map *nodemap, uint32_t exclude_pnn,
  68                          TALLOC_CTX *mem_ctx, uint32_t **pnn_list)
  69 {
  70         return list_of_nodes(nodemap, NODE_FLAGS_INACTIVE, exclude_pnn,
  71                              mem_ctx, pnn_list);
  72 }
  73
  74 int list_of_connected_nodes(struct ctdb_node_map *nodemap,
  75                             uint32_t exclude_pnn,
  76                             TALLOC_CTX *mem_ctx, uint32_t **pnn_list)
  77 {
  78         return list_of_nodes(nodemap, NODE_FLAGS_DISCONNECTED, exclude_pnn,
  79                              mem_ctx, pnn_list);
  80 }
  81
  82 struct ctdb_server_id ctdb_client_get_server_id(
  83                                 struct ctdb_client_context *client,
  84                                 uint32_t task_id)
  85 {
  86         struct ctdb_server_id sid;
  87
  88         sid.pid = getpid();
  89         sid.task_id = task_id;
  90         sid.vnn = ctdb_client_pnn(client);
  91         sid.unique_id = task_id;
  92         sid.unique_id = (sid.unique_id << 32) | sid.pid;
  93
  94         return sid;
  95 }
  96
  97 bool ctdb_server_id_equal(struct ctdb_server_id *sid1,
  98                           struct ctdb_server_id *sid2)
  99 {
 100         if (sid1->pid != sid2->pid) {
 101                 return false;
 102         }
 103         if (sid1->task_id != sid2->task_id) {
 104                 return false;
 105         }
 106         if (sid1->vnn != sid2->vnn) {
 107                 return false;
 108         }
 109         if (sid1->unique_id != sid2->unique_id) {
 110                 return false;
 111         }
 112
 113         return true;
 114 }
 115
 116 int ctdb_server_id_exists(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
 117                           struct ctdb_client_context *client,
 118                           struct ctdb_server_id *sid, bool *exists)
 119 {
 120         int result;
 121         int ret;
 122
 123         ret = ctdb_ctrl_process_exists(mem_ctx, ev, client, sid->vnn,
 124                                        tevent_timeval_zero(),
 125                                        sid->pid, &result);
 126         if (ret != 0) {
 127                 return ret;
 128         }
 129
 130         if (result == 1) {
 131                 *exists = true;
 132         } else {
 133                 *exists = false;
 134         }
 135
 136         return 0;
 137 }