ctdb/tests/src/ctdb_update_record.c

   1 /*
   2    simple ctdb test tool
   3    This test just fetch_locks a record bumps the RSN and then writes new content
   4
   5    Copyright (C) Ronnie Sahlberg 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/filesys.h"
  23 #include "popt.h"
  24 #include "cmdline.h"
  25 #include "ctdb_private.h"
  26
  27 static struct ctdb_db_context *ctdb_db;
  28
  29 #define TESTKEY "testkey"
  30
  31
  32 /*
  33         Just try locking/unlocking a single record once
  34 */
  35 static void fetch_lock_once(struct ctdb_context *ctdb, struct event_context *ev, uint32_t generation)
  36 {
  37         TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
  38         TDB_DATA key, data;
  39         struct ctdb_record_handle *h;
  40         struct ctdb_ltdb_header *header;
  41         int ret;
  42
  43         key.dptr = discard_const(TESTKEY);
  44         key.dsize = strlen(TESTKEY);
  45
  46         printf("Trying to fetch lock the record ...\n");
  47
  48         h = ctdb_fetch_lock(ctdb_db, tmp_ctx, key, &data);
  49         if (h == NULL) {
  50                 printf("Failed to fetch record '%s' on node %d\n",
  51                         (const char *)key.dptr, ctdb_get_pnn(ctdb));
  52                 talloc_free(tmp_ctx);
  53                 exit(10);
  54         }
  55
  56         printf("Record fetchlocked.\n");
  57         header = talloc_memdup(tmp_ctx, ctdb_header_from_record_handle(h), sizeof(*header));
  58         printf("RSN:%d\n", (int)header->rsn);
  59         talloc_free(h);
  60         printf("Record released.\n");
  61
  62         printf("Write new record with RSN+10\n");
  63         header->rsn += 10;
  64         data.dptr = (void *)talloc_asprintf(tmp_ctx, "%d", (int)header->rsn);
  65         data.dsize = strlen((char *)data.dptr);
  66
  67         ret = ctdb_ctrl_updaterecord(ctdb, ctdb, timeval_zero(), CTDB_CURRENT_NODE, ctdb_db, key, header, data);
  68         if (ret != 0) {
  69                 printf("Failed to writerecord,  ret==%d\n", ret);
  70                 exit(1);
  71         }
  72
  73         printf("re-fetch the record\n");
  74         h = ctdb_fetch_lock(ctdb_db, tmp_ctx, key, &data);
  75         if (h == NULL) {
  76                 printf("Failed to fetch record '%s' on node %d\n",
  77                         (const char *)key.dptr, ctdb_get_pnn(ctdb));
  78                 talloc_free(tmp_ctx);
  79                 exit(10);
  80         }
  81
  82         printf("Record fetchlocked.\n");
  83         header = talloc_memdup(tmp_ctx, ctdb_header_from_record_handle(h), sizeof(*header));
  84         printf("RSN:%d\n", (int)header->rsn);
  85         talloc_free(h);
  86         printf("Record released.\n");
  87
  88         talloc_free(tmp_ctx);
  89 }
  90
  91 /*
  92   main program
  93 */
  94 int main(int argc, const char *argv[])
  95 {
  96         struct ctdb_context *ctdb;
  97
  98         struct poptOption popt_options[] = {
  99                 POPT_AUTOHELP
 100                 POPT_CTDB_CMDLINE
 101                 POPT_TABLEEND
 102         };
 103         int opt;
 104         const char **extra_argv;
 105         int extra_argc = 0;
 106         poptContext pc;
 107         struct event_context *ev;
 108         struct ctdb_vnn_map *vnnmap=NULL;
 109
 110         pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
 111
 112         while ((opt = poptGetNextOpt(pc)) != -1) {
 113                 switch (opt) {
 114                 default:
 115                         fprintf(stderr, "Invalid option %s: %s\n",
 116                                 poptBadOption(pc, 0), poptStrerror(opt));
 117                         exit(1);
 118                 }
 119         }
 120
 121         /* setup the remaining options for the main program to use */
 122         extra_argv = poptGetArgs(pc);
 123         if (extra_argv) {
 124                 extra_argv++;
 125                 while (extra_argv[extra_argc]) extra_argc++;
 126         }
 127
 128         ev = event_context_init(NULL);
 129
 130         ctdb = ctdb_cmdline_client(ev, timeval_current_ofs(5, 0));
 131         if (ctdb == NULL) {
 132                 exit(1);
 133         }
 134
 135         /* attach to a specific database */
 136         ctdb_db = ctdb_attach(ctdb, timeval_current_ofs(5, 0), "test.tdb", false, 0);
 137         if (!ctdb_db) {
 138                 printf("ctdb_attach failed - %s\n", ctdb_errstr(ctdb));
 139                 exit(1);
 140         }
 141
 142         printf("Waiting for cluster\n");
 143         while (1) {
 144                 uint32_t recmode=1;
 145                 ctdb_ctrl_getrecmode(ctdb, ctdb, timeval_zero(), CTDB_CURRENT_NODE, &recmode);
 146                 if (recmode == 0) break;
 147                 event_loop_once(ev);
 148         }
 149
 150
 151         if (ctdb_ctrl_getvnnmap(ctdb, timeval_zero(), CTDB_CURRENT_NODE, ctdb, &vnnmap) != 0) {
 152                 printf("Unable to get vnnmap from local node\n");
 153                 exit(1);
 154         }
 155         printf("Current Generation %d\n", (int)vnnmap->generation);
 156
 157         fetch_lock_once(ctdb, ev, vnnmap->generation);
 158
 159         return 0;
 160 }