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
  37 int list_of_nodes(struct ctdb_node_map *nodemap,
  38                   uint32_t flags_mask, uint32_t exclude_pnn,
  39                   TALLOC_CTX *mem_ctx, uint32_t **pnn_list)
  40 {
  41         int num_nodes = 0;
  42         uint32_t *list;
  43         int i;
  44
  45         /* Allocate the list of same number of nodes */
  46         list = talloc_array(mem_ctx, uint32_t, nodemap->num);
  47         if (list == NULL) {
  48                 return -1;
  49         }
  50
  51         for (i=0; i<nodemap->num; i++) {
  52                 if (nodemap->node[i].flags & flags_mask) {
  53                         continue;
  54                 }
  55                 if (nodemap->node[i].pnn == exclude_pnn) {
  56                         continue;
  57                 }
  58                 list[num_nodes] = nodemap->node[i].pnn;
  59                 num_nodes++;
  60         }
  61
  62         *pnn_list = list;
  63         return num_nodes;
  64 }
  65
  66 int list_of_active_nodes(struct ctdb_node_map *nodemap, uint32_t exclude_pnn,
  67                          TALLOC_CTX *mem_ctx, uint32_t **pnn_list)
  68 {
  69         return list_of_nodes(nodemap, NODE_FLAGS_INACTIVE, exclude_pnn,
  70                              mem_ctx, pnn_list);
  71 }
  72
  73 int list_of_connected_nodes(struct ctdb_node_map *nodemap,
  74                             uint32_t exclude_pnn,
  75                             TALLOC_CTX *mem_ctx, uint32_t **pnn_list)
  76 {
  77         return list_of_nodes(nodemap, NODE_FLAGS_DISCONNECTED, exclude_pnn,
  78                              mem_ctx, pnn_list);
  79 }
  80
  81 int ctdb_ctrl_modflags(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
  82                        struct ctdb_client_context *client,
  83                        uint32_t destnode, struct timeval timeout,
  84                        uint32_t set, uint32_t clear)
  85 {
  86         struct ctdb_node_map *nodemap;
  87         struct ctdb_node_flag_change flag_change;
  88         struct ctdb_req_control request;
  89         uint32_t *pnn_list;
  90         int ret, count;
  91
  92         ret = ctdb_ctrl_get_nodemap(mem_ctx, ev, client, destnode,
  93                                     tevent_timeval_zero(), &nodemap);
  94         if (ret != 0) {
  95                 return ret;
  96         }
  97
  98         flag_change.pnn = destnode;
  99         flag_change.old_flags = nodemap->node[destnode].flags;
 100         flag_change.new_flags = flag_change.old_flags | set;
 101         flag_change.new_flags &= ~clear;
 102
 103         count = list_of_connected_nodes(nodemap, -1, mem_ctx, &pnn_list);
 104         if (count == -1) {
 105                 return ENOMEM;
 106         }
 107
 108         ctdb_req_control_modify_flags(&request, &flag_change);
 109         ret = ctdb_client_control_multi(mem_ctx, ev, client, pnn_list, count,
 110                                         tevent_timeval_zero(), &request,
 111                                         NULL, NULL);
 112         return ret;
 113 }
 114
 115 struct ctdb_server_id ctdb_client_get_server_id(
 116                                 struct ctdb_client_context *client,
 117                                 uint32_t task_id)
 118 {
 119         struct ctdb_server_id sid;
 120
 121         sid.pid = getpid();
 122         sid.task_id = task_id;
 123         sid.vnn = ctdb_client_pnn(client);
 124         sid.unique_id = task_id;
 125         sid.unique_id = (sid.unique_id << 32) | sid.pid;
 126
 127         return sid;
 128 }
 129
 130 bool ctdb_server_id_equal(struct ctdb_server_id *sid1,
 131                           struct ctdb_server_id *sid2)
 132 {
 133         if (sid1->pid != sid2->pid) {
 134                 return false;
 135         }
 136         if (sid1->task_id != sid2->task_id) {
 137                 return false;
 138         }
 139         if (sid1->vnn != sid2->vnn) {
 140                 return false;
 141         }
 142         if (sid1->unique_id != sid2->unique_id) {
 143                 return false;
 144         }
 145
 146         return true;
 147 }
 148
 149 int ctdb_server_id_exists(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
 150                           struct ctdb_client_context *client,
 151                           struct ctdb_server_id *sid, bool *exists)
 152 {
 153         uint8_t *result;
 154         int ret;
 155
 156         ret = ctdb_ctrl_check_srvids(mem_ctx, ev, client, sid->vnn,
 157                                      tevent_timeval_zero(),
 158                                      &sid->unique_id, 1, &result);
 159         if (ret != 0) {
 160                 return ret;
 161         }
 162
 163         if (result[0] == 1) {
 164                 *exists = true;
 165         } else {
 166                 *exists = false;
 167         }
 168
 169         return 0;
 170 }