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/*
This file is part of TALER
Copyright (C) 2014-2021 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file exchange-tools/taler-exchange-dbinit.c
* @brief Create tables for the exchange database.
* @author Florian Dold
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include "taler_exchangedb_lib.h"
/**
* Return value from main().
*/
static int global_ret;
/**
* -r option: do full DB reset
*/
static int reset_db;
/**
* -s option: clear revolving shard locks
*/
static int clear_shards;
/**
* -g option: garbage collect DB reset
*/
static int gc_db;
/**
* -P option: setup a partitioned database
*/
static uint32_t num_partitions;
/**
* -F option: setup a sharded database, i.e. create foreign tables/server
*/
static int shard_db;
/**
* -f option: force partitions to be created when there is only one
*/
static int force_create_partitions;
/**
* -S option: setup a database on a shard server, creates tables with suffix shard_idx
*/
static uint32_t shard_idx;
/**
* -R option: do full shard DB reset
*/
static uint32_t reset_shard_db;
/**
* Main function that will be run.
*
* @param cls closure
* @param args remaining command-line arguments
* @param cfgfile name of the configuration file used (for saving, can be NULL!)
* @param cfg configuration
*/
static void
run (void *cls,
char *const *args,
const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct TALER_EXCHANGEDB_Plugin *plugin;
(void) cls;
(void) args;
(void) cfgfile;
if (NULL ==
(plugin = TALER_EXCHANGEDB_plugin_load (cfg)))
{
fprintf (stderr,
"Failed to initialize database plugin.\n");
global_ret = EXIT_NOTINSTALLED;
return;
}
if (reset_db)
{
if (GNUNET_OK != plugin->drop_tables (plugin->cls))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not drop tables as requested. Either database was not yet initialized, or permission denied. Consult the logs. Will still try to create new tables.\n");
}
}
if (0 <
reset_shard_db)
{
if (GNUNET_OK != plugin->drop_shard_tables (plugin->cls, reset_shard_db))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not drop shard tables as requested. Either database was not yet initialized or permission denied. Consult the logs.\n");
global_ret = EXIT_FAILURE;
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
"Dropped shard database, please call taler-exchange-dbinit -S <N> to initialize a new shard database\n");
return;
}
if (0 <
shard_idx)
{
if (GNUNET_OK != plugin->create_shard_tables (plugin->cls,
shard_idx))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not create shard database\n");
global_ret = EXIT_NOTINSTALLED;
}
/* We do not want to continue if we are on a shard */
TALER_EXCHANGEDB_plugin_unload (plugin);
plugin = NULL;
return;
}
if (GNUNET_OK !=
plugin->create_tables (plugin->cls))
{
fprintf (stderr,
"Failed to initialize database.\n");
TALER_EXCHANGEDB_plugin_unload (plugin);
plugin = NULL;
global_ret = EXIT_NOPERMISSION;
return;
}
if (1 <
num_partitions
|| (
1 == num_partitions
&& force_create_partitions))
{
enum GNUNET_GenericReturnValue r = GNUNET_OK;
if (shard_db)
{
r = plugin->setup_foreign_servers (plugin->cls,
num_partitions);
}
else
{
r = plugin->setup_partitions (plugin->cls,
num_partitions);
}
if (GNUNET_OK != r)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not setup partitions. Dropping default ones again\n");
if (GNUNET_OK != plugin->drop_tables (plugin->cls))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not drop tables after failed partitioning, please delete the DB manually\n");
}
TALER_EXCHANGEDB_plugin_unload (plugin);
plugin = NULL;
global_ret = EXIT_NOTINSTALLED;
return;
}
}
if (gc_db || clear_shards)
{
if (GNUNET_OK !=
plugin->preflight (plugin->cls))
{
fprintf (stderr,
"Failed to prepare database.\n");
TALER_EXCHANGEDB_plugin_unload (plugin);
plugin = NULL;
global_ret = EXIT_NOPERMISSION;
return;
}
if (clear_shards)
{
if (0 >
plugin->delete_shard_locks (plugin->cls))
{
fprintf (stderr,
"Clearing revolving shards failed!\n");
}
}
if (gc_db)
{
if (GNUNET_SYSERR == plugin->gc (plugin->cls))
{
fprintf (stderr,
"Garbage collection failed!\n");
}
}
}
TALER_EXCHANGEDB_plugin_unload (plugin);
plugin = NULL;
}
/**
* The main function of the database initialization tool.
* Used to initialize the Taler Exchange's database.
*
* @param argc number of arguments from the command line
* @param argv command line arguments
* @return 0 ok, non-zero on error
*/
int
main (int argc,
char *const *argv)
{
const struct GNUNET_GETOPT_CommandLineOption options[] = {
GNUNET_GETOPT_option_flag ('g',
"gc",
"garbage collect database",
&gc_db),
GNUNET_GETOPT_option_flag ('r',
"reset",
"reset database (DANGEROUS: all existing data is lost!)",
&reset_db),
GNUNET_GETOPT_option_flag ('s',
"shardunlock",
"unlock all revolving shard locks (use after system crash or shard size change while services are not running)",
&clear_shards),
GNUNET_GETOPT_option_uint ('P',
"partition",
"NUMBER",
"Setup a partitioned database where each table which can be partitioned holds NUMBER partitions on a single DB node (NOTE: sharding add -F for sharding)",
&num_partitions),
GNUNET_GETOPT_option_flag ('F',
"foreign",
"Setup a sharded database with foreign servers (shards) / tables rather than a partitioned one, must be called as DB superuser.",
&shard_db),
GNUNET_GETOPT_option_uint ('S',
"shard",
"INDEX",
"Setup a shard server, creates tables with INDEX as suffix",
&shard_idx),
GNUNET_GETOPT_option_uint ('R',
"reset-shard",
"OLD_SHARD_IDX",
"reset a shard database, does not reinitialize i.e. call taler-exchange-dbinit -S afterwards (DANGEROUS: all existsing data is lost!)",
&reset_shard_db),
GNUNET_GETOPT_option_flag ('f',
"force",
"Force partitions to be created if there is only one partition",
&force_create_partitions),
GNUNET_GETOPT_OPTION_END
};
enum GNUNET_GenericReturnValue ret;
if (GNUNET_OK !=
GNUNET_STRINGS_get_utf8_args (argc, argv,
&argc, &argv))
return EXIT_INVALIDARGUMENT;
/* force linker to link against libtalerutil; if we do
not do this, the linker may "optimize" libtalerutil
away and skip #TALER_OS_init(), which we do need */
TALER_OS_init ();
ret = GNUNET_PROGRAM_run (
argc, argv,
"taler-exchange-dbinit",
gettext_noop ("Initialize Taler exchange database"),
options,
&run, NULL);
GNUNET_free_nz ((void *) argv);
if (GNUNET_SYSERR == ret)
return EXIT_INVALIDARGUMENT;
if (GNUNET_NO == ret)
return EXIT_SUCCESS;
return global_ret;
}
/* end of taler-exchange-dbinit.c */
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