MDEV-19275 Provide SQL service to plugins.

test_sql_service plugin added and employed in test_sql_service.test.

plugin/test_sql_service/test_sql_service.c

@@ -0,0 +1,145 @@
+/* Copyright (C) 2019, Alexey Botchkov and MariaDB Corporation
+
+   This program 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; version 2 of the License.
+
+   This program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+
+#define PLUGIN_VERSION 0x100
+#define PLUGIN_STR_VERSION "1.0.0"
+
+#define _my_thread_var loc_thread_var
+
+#include <my_config.h>
+#include <assert.h>
+#include <my_global.h>
+#include <my_base.h>
+#include <typelib.h>
+//#include <mysql_com.h>  /* for enum enum_server_command */
+#include <mysql/plugin.h>
+#include <mysql/plugin_audit.h>
+//#include <string.h>
+
+
+LEX_STRING * thd_query_string (MYSQL_THD thd);
+unsigned long long thd_query_id(const MYSQL_THD thd);
+size_t thd_query_safe(MYSQL_THD thd, char *buf, size_t buflen);
+const char *thd_user_name(MYSQL_THD thd);
+const char *thd_client_host(MYSQL_THD thd);
+const char *thd_client_ip(MYSQL_THD thd);
+LEX_CSTRING *thd_current_db(MYSQL_THD thd);
+int thd_current_status(MYSQL_THD thd);
+enum enum_server_command thd_current_command(MYSQL_THD thd);
+
+int maria_compare_hostname(const char *wild_host, long wild_ip, long ip_mask,
+                         const char *host, const char *ip);
+void maria_update_hostname(const char **wild_host, long *wild_ip, long *ip_mask,
+                         const char *host);
+
+/* Status variables for SHOW STATUS */
+static long test_passed= 0;
+static struct st_mysql_show_var test_sql_status[]=
+{
+  {"test_sql_service_passed", (char *)&test_passed, SHOW_LONG},
+  {0,0,0}
+};
+
+static my_bool do_test= TRUE;
+static void run_test(MYSQL_THD thd, struct st_mysql_sys_var *var,
+                     void *var_ptr, const void *save);
+static MYSQL_SYSVAR_BOOL(run_test, do_test, PLUGIN_VAR_OPCMDARG,
+           "Perform the test now.", NULL, run_test, FALSE);
+static struct st_mysql_sys_var* test_sql_vars[]=
+{
+  MYSQL_SYSVAR(run_test),
+  NULL
+};
+
+
+extern int execute_sql_command(const char *command,
+                                   char *hosts, char *names, char *filters);
+
+
+
+static int do_tests()
+{
+  char plugins[1024];
+  char names[1024];
+  char dl[2048];
+  int result;
+
+  result= execute_sql_command("select 'plugin', name, dl from mysql.plugin",
+                          plugins, names, dl);
+
+  return result;
+}
+ 
+
+void auditing(MYSQL_THD thd, unsigned int event_class, const void *ev)
+{
+}
+
+
+static void run_test(MYSQL_THD thd  __attribute__((unused)),
+                     struct st_mysql_sys_var *var  __attribute__((unused)),
+                     void *var_ptr  __attribute__((unused)),
+                     const void *save  __attribute__((unused)))
+{
+  test_passed= do_tests();
+}
+
+
+static int init_done= 0;
+
+static int test_sql_service_plugin_init(void *p __attribute__((unused)))
+{
+  init_done= 1;
+  return 0;
+}
+
+
+static int test_sql_service_plugin_deinit(void *p __attribute__((unused)))
+{
+  if (!init_done)
+    return 0;
+
+  return 0;
+}
+
+
+static struct st_mysql_audit maria_descriptor =
+{
+  MYSQL_AUDIT_INTERFACE_VERSION,
+  NULL,
+  auditing,
+  { MYSQL_AUDIT_GENERAL_CLASSMASK |
+    MYSQL_AUDIT_TABLE_CLASSMASK |
+    MYSQL_AUDIT_CONNECTION_CLASSMASK }
+};
+maria_declare_plugin(test_sql_service)
+{
+  MYSQL_AUDIT_PLUGIN,
+  &maria_descriptor,
+  "TEST_SQL_SERVICE",
+  "Alexey Botchkov (MariaDB Corporation)",
+  "Test SQL service",
+  PLUGIN_LICENSE_GPL,
+  test_sql_service_plugin_init,
+  test_sql_service_plugin_deinit,
+  PLUGIN_VERSION,
+  test_sql_status,
+  test_sql_vars,
+  PLUGIN_STR_VERSION,
+  MariaDB_PLUGIN_MATURITY_STABLE
+}
+maria_declare_plugin_end;
+