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https://github.com/codership/wsrep-lib.git
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3965d83968
Passing a callback allows constructing the options string using config service after loading the provider but before initializing the provider. This way it is possible get options which are given at DBMS startup, in command line or config file.
250 lines
8.5 KiB
C++
250 lines
8.5 KiB
C++
/*
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* Copyright (C) 2022 Codership Oy <info@codership.com>
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*
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* This file is part of wsrep-lib.
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*
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* Wsrep-lib is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* Wsrep-lib is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config_service_v1.hpp"
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#include "service_helpers.hpp"
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#include "v26/wsrep_api.h"
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#include "v26/wsrep_config_service.h"
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#include "wsrep/logger.hpp"
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#include "wsrep/provider_options.hpp"
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#include <cassert>
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namespace wsrep_config_service_v1
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{
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wsrep_config_service_v1_t service{ 0 };
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static int map_flags(int flags)
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{
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int option_flags = 0;
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if (flags & WSREP_PARAM_DEPRECATED)
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option_flags |= wsrep::provider_options::flag::deprecated;
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if (flags & WSREP_PARAM_READONLY)
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option_flags |= wsrep::provider_options::flag::readonly;
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if (flags & WSREP_PARAM_TYPE_BOOL)
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option_flags |= wsrep::provider_options::flag::type_bool;
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if (flags & WSREP_PARAM_TYPE_INTEGER)
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option_flags |= wsrep::provider_options::flag::type_integer;
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if (flags & WSREP_PARAM_TYPE_DOUBLE)
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option_flags |= wsrep::provider_options::flag::type_double;
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return option_flags;
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}
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static enum wsrep::provider::status
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make_option(wsrep::provider_options* opt, const char* name, const char* val,
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int flags)
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{
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std::unique_ptr<wsrep::provider_options::option_value> value(
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new wsrep::provider_options::option_value_string(val));
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std::unique_ptr<wsrep::provider_options::option_value> default_value(
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new wsrep::provider_options::option_value_string(val));
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return opt->set_default(name, std::move(value),
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std::move(default_value), flags);
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}
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static enum wsrep::provider::status
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make_option(wsrep::provider_options* opt, const char* name, int64_t val,
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int flags)
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{
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std::unique_ptr<wsrep::provider_options::option_value> value(
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new wsrep::provider_options::option_value_int(val));
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std::unique_ptr<wsrep::provider_options::option_value> default_value(
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new wsrep::provider_options::option_value_int(val));
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return opt->set_default(name, std::move(value),
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std::move(default_value), flags);
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}
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static enum wsrep::provider::status
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make_option(wsrep::provider_options* opt, const char* name, bool val,
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int flags)
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{
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std::unique_ptr<wsrep::provider_options::option_value> value(
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new wsrep::provider_options::option_value_bool(val));
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std::unique_ptr<wsrep::provider_options::option_value> default_value(
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new wsrep::provider_options::option_value_bool(val));
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return opt->set_default(name, std::move(value),
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std::move(default_value), flags);
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}
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static enum wsrep::provider::status
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make_option(wsrep::provider_options* opt, const char* name, double val,
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int flags)
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{
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std::unique_ptr<wsrep::provider_options::option_value> value(
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new wsrep::provider_options::option_value_double(val));
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std::unique_ptr<wsrep::provider_options::option_value> default_value(
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new wsrep::provider_options::option_value_double(val));
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return opt->set_default(name, std::move(value),
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std::move(default_value), flags);
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}
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wsrep_status_t service_callback(const wsrep_parameter* p, void* context)
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{
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const int flags = map_flags(p->flags);
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enum wsrep::provider::status ret(wsrep::provider::error_unknown);
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wsrep::provider_options* options = (wsrep::provider_options*)context;
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switch (p->flags & WSREP_PARAM_TYPE_MASK)
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{
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case WSREP_PARAM_TYPE_BOOL:
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ret = make_option(options, p->name, p->value.as_bool, flags);
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break;
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case WSREP_PARAM_TYPE_INTEGER:
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ret = make_option(options, p->name, p->value.as_integer, flags);
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break;
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case WSREP_PARAM_TYPE_DOUBLE:
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ret = make_option(options, p->name, p->value.as_double, flags);
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break;
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default:
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assert((p->flags & WSREP_PARAM_TYPE_MASK) == 0);
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ret = make_option(options, p->name, p->value.as_string, flags);
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break;
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}
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if (ret == wsrep::provider::success)
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return WSREP_OK;
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else
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return WSREP_FATAL;
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}
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} // namespace wsrep_config_service_v1
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static int config_service_v1_probe(void* dlh)
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{
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typedef int (*init_fn)(wsrep_config_service_v1_t*);
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typedef void (*deinit_fn)();
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return wsrep_impl::service_probe<init_fn>(
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dlh, WSREP_CONFIG_SERVICE_INIT_FUNC_V1, "config service v1")
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|| wsrep_impl::service_probe<deinit_fn>(
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dlh, WSREP_CONFIG_SERVICE_DEINIT_FUNC_V1, "config service v1");
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}
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static int config_service_v1_init(void* dlh)
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{
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typedef int (*init_fn)(wsrep_config_service_v1_t*);
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return wsrep_impl::service_init<init_fn>(
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dlh, WSREP_CONFIG_SERVICE_INIT_FUNC_V1,
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&wsrep_config_service_v1::service, "config service v1");
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}
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static void config_service_v1_deinit(void* dlh)
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{
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typedef int (*deinit_fn)();
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wsrep_impl::service_deinit<deinit_fn>(
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dlh, WSREP_CONFIG_SERVICE_DEINIT_FUNC_V1, "config service v1");
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}
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int wsrep::config_service_v1_fetch(wsrep::provider& provider,
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wsrep::provider_options* options)
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{
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struct wsrep_st* wsrep = static_cast<struct wsrep_st*>(provider.native());
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if (wsrep == nullptr)
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{
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// Not a provider which was loaded via wsrep-API
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return 0;
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}
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if (config_service_v1_probe(wsrep->dlh))
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{
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wsrep::log_warning() << "Provider does not support config service v1";
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return 1;
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}
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if (config_service_v1_init(wsrep->dlh))
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{
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wsrep::log_warning() << "Failed to initialize config service v1";
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return 1;
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}
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wsrep_status_t ret = wsrep_config_service_v1::service.get_parameters(
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wsrep, &wsrep_config_service_v1::service_callback, options);
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config_service_v1_deinit(wsrep->dlh);
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if (ret != WSREP_OK)
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{
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return 1;
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}
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return 0;
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}
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namespace wsrep_config_service_v2
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{
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wsrep_config_service_v2_t service{ 0 };
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wsrep_status_t service_callback(const wsrep_parameter* p, void* context)
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{
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return wsrep_config_service_v1::service_callback(p, context);
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}
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} // namespace wsrep_config_service_v2
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static int config_service_v2_probe(void* dlh)
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{
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typedef int (*init_fn)(wsrep_config_service_v2_t*);
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typedef void (*deinit_fn)();
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return wsrep_impl::service_probe<init_fn>(
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dlh, WSREP_CONFIG_SERVICE_INIT_FUNC_V2, "config service v2")
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|| wsrep_impl::service_probe<deinit_fn>(
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dlh, WSREP_CONFIG_SERVICE_DEINIT_FUNC_V2, "config service v2");
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}
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static int config_service_v2_init(void* dlh)
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{
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typedef int (*init_fn)(wsrep_config_service_v2_t*);
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return wsrep_impl::service_init<init_fn>(
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dlh, WSREP_CONFIG_SERVICE_INIT_FUNC_V2,
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&wsrep_config_service_v2::service, "config service v2");
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}
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static void config_service_v2_deinit(void* dlh)
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{
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typedef int (*deinit_fn)();
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wsrep_impl::service_deinit<deinit_fn>(
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dlh, WSREP_CONFIG_SERVICE_DEINIT_FUNC_V2, "config service v2");
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}
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int wsrep::config_service_v2_fetch(struct wsrep_st* wsrep,
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wsrep::provider_options* options)
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{
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if (wsrep == nullptr)
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{
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// Not a provider which was loaded via wsrep-API
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return 0;
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}
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if (config_service_v2_probe(wsrep->dlh))
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{
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wsrep::log_info() << "Provider does not support config service v2";
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return 1;
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}
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if (config_service_v2_init(wsrep->dlh))
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{
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wsrep::log_warning() << "Failed to initialize config service v2";
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return 1;
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}
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wsrep_status_t ret = wsrep_config_service_v2::service.get_parameters(
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wsrep, &wsrep_config_service_v2::service_callback, options);
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config_service_v2_deinit(wsrep->dlh);
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if (ret != WSREP_OK)
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{
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return 1;
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}
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return 0;
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}
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