1 files changed, 176 insertions, 0 deletions
diff --git a/wsrep-lib/src/config_service_v1.cpp b/wsrep-lib/src/config_service_v1.cpp
new file mode 100644
index 00000000..ace61427
--- /dev/null
+++ b/wsrep-lib/src/config_service_v1.cpp
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2022 Codership Oy <info@codership.com>
+ *
+ * This file is part of wsrep-lib.
+ *
+ * Wsrep-lib 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Wsrep-lib 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 wsrep-lib.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config_service_v1.hpp"
+#include "service_helpers.hpp"
+#include "v26/wsrep_config_service.h"
+#include "wsrep/logger.hpp"
+#include "wsrep/provider_options.hpp"
+
+#include <cassert>
+
+namespace wsrep_config_service_v1
+{
+    wsrep_config_service_v1_t service{ 0 };
+
+    static int map_flags(int flags)
+    {
+        int option_flags = 0;
+        if (flags & WSREP_PARAM_DEPRECATED)
+            option_flags |= wsrep::provider_options::flag::deprecated;
+        if (flags & WSREP_PARAM_READONLY)
+            option_flags |= wsrep::provider_options::flag::readonly;
+        if (flags & WSREP_PARAM_TYPE_BOOL)
+            option_flags |= wsrep::provider_options::flag::type_bool;
+        if (flags & WSREP_PARAM_TYPE_INTEGER)
+            option_flags |= wsrep::provider_options::flag::type_integer;
+        if (flags & WSREP_PARAM_TYPE_DOUBLE)
+            option_flags |= wsrep::provider_options::flag::type_double;
+        return option_flags;
+    }
+
+    static enum wsrep::provider::status
+    make_option(wsrep::provider_options* opt, const char* name, const char* val,
+                int flags)
+    {
+        std::unique_ptr<wsrep::provider_options::option_value> value(
+            new wsrep::provider_options::option_value_string(val));
+        std::unique_ptr<wsrep::provider_options::option_value> default_value(
+            new wsrep::provider_options::option_value_string(val));
+        return opt->set_default(name, std::move(value),
+                                std::move(default_value), flags);
+    }
+
+    static enum wsrep::provider::status
+    make_option(wsrep::provider_options* opt, const char* name, int64_t val,
+                int flags)
+    {
+        std::unique_ptr<wsrep::provider_options::option_value> value(
+            new wsrep::provider_options::option_value_int(val));
+        std::unique_ptr<wsrep::provider_options::option_value> default_value(
+            new wsrep::provider_options::option_value_int(val));
+        return opt->set_default(name, std::move(value),
+                                std::move(default_value), flags);
+    }
+
+    static enum wsrep::provider::status
+    make_option(wsrep::provider_options* opt, const char* name, bool val,
+                int flags)
+    {
+        std::unique_ptr<wsrep::provider_options::option_value> value(
+            new wsrep::provider_options::option_value_bool(val));
+        std::unique_ptr<wsrep::provider_options::option_value> default_value(
+            new wsrep::provider_options::option_value_bool(val));
+        return opt->set_default(name, std::move(value),
+                                std::move(default_value), flags);
+    }
+
+    static enum wsrep::provider::status
+    make_option(wsrep::provider_options* opt, const char* name, double val,
+                int flags)
+    {
+        std::unique_ptr<wsrep::provider_options::option_value> value(
+            new wsrep::provider_options::option_value_double(val));
+        std::unique_ptr<wsrep::provider_options::option_value> default_value(
+            new wsrep::provider_options::option_value_double(val));
+        return opt->set_default(name, std::move(value),
+                                std::move(default_value), flags);
+    }
+
+    wsrep_status_t service_callback(const wsrep_parameter* p, void* context)
+    {
+        const int flags = map_flags(p->flags);
+        enum wsrep::provider::status ret(wsrep::provider::error_unknown);
+        wsrep::provider_options* options = (wsrep::provider_options*)context;
+        switch (p->flags & WSREP_PARAM_TYPE_MASK)
+        {
+        case WSREP_PARAM_TYPE_BOOL:
+            ret = make_option(options, p->name, p->value.as_bool, flags);
+            break;
+        case WSREP_PARAM_TYPE_INTEGER:
+            ret = make_option(options, p->name, p->value.as_integer, flags);
+            break;
+        case WSREP_PARAM_TYPE_DOUBLE:
+            ret = make_option(options, p->name, p->value.as_double, flags);
+            break;
+        default:
+            assert((p->flags & WSREP_PARAM_TYPE_MASK) == 0);
+            ret = make_option(options, p->name, p->value.as_string, flags);
+            break;
+        }
+
+        if (ret == wsrep::provider::success)
+            return WSREP_OK;
+        else
+            return WSREP_FATAL;
+    }
+} // namespace wsrep_config_service_v1
+
+static int config_service_v1_probe(void* dlh)
+{
+    typedef int (*init_fn)(wsrep_config_service_v1_t*);
+    typedef void (*deinit_fn)();
+    return wsrep_impl::service_probe<init_fn>(
+               dlh, WSREP_CONFIG_SERVICE_INIT_FUNC_V1, "config service v1")
+           || wsrep_impl::service_probe<deinit_fn>(
+               dlh, WSREP_CONFIG_SERVICE_DEINIT_FUNC_V1, "config service v1");
+}
+
+static int config_service_v1_init(void* dlh)
+{
+    typedef int (*init_fn)(wsrep_config_service_v1_t*);
+    return wsrep_impl::service_init<init_fn>(
+        dlh, WSREP_CONFIG_SERVICE_INIT_FUNC_V1,
+        &wsrep_config_service_v1::service, "config service v1");
+}
+
+static void config_service_v1_deinit(void* dlh)
+{
+    typedef int (*deinit_fn)();
+    wsrep_impl::service_deinit<deinit_fn>(
+        dlh, WSREP_CONFIG_SERVICE_DEINIT_FUNC_V1, "config service v1");
+}
+
+int wsrep::config_service_v1_fetch(wsrep::provider& provider,
+                                   wsrep::provider_options* options)
+{
+    struct wsrep_st* wsrep = (struct wsrep_st*)provider.native();
+    if (config_service_v1_probe(wsrep->dlh))
+    {
+        wsrep::log_warning() << "Provider does not support config service v1";
+        return 1;
+    }
+    if (config_service_v1_init(wsrep->dlh))
+    {
+        wsrep::log_warning() << "Failed to initialize config service v1";
+        return 1;
+    }
+
+    wsrep_status_t ret = wsrep_config_service_v1::service.get_parameters(
+        wsrep, &wsrep_config_service_v1::service_callback, options);
+
+    config_service_v1_deinit(wsrep->dlh);
+
+    if (ret != WSREP_OK)
+    {
+        return 1;
+    }
+
+    return 0;
+}