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/* Copyright (c) 2017, 2022, 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 02110-1301, USA */
#include <my_global.h>
#include <mysqld.h>
#include <mysql.h>
#include <xtrabackup.h>
#include <xb_plugin.h>
#include <sql_plugin.h>
#include <sstream>
#include <vector>
#include <common.h>
#include <backup_mysql.h>
#include <srv0srv.h>
extern struct st_maria_plugin *mysql_optional_plugins[];
extern struct st_maria_plugin *mysql_mandatory_plugins[];
static void xb_plugin_init(int argc, char **argv);
extern char *xb_plugin_load;
extern char *xb_plugin_dir;
const int PLUGIN_MAX_ARGS = 1024;
std::vector<std::string> backup_plugins_args;
const char *QUERY_PLUGIN =
"SELECT plugin_name, plugin_library, @@plugin_dir"
" FROM information_schema.plugins WHERE plugin_type='ENCRYPTION'"
" OR (plugin_type = 'DAEMON' AND plugin_name LIKE 'provider\\_%')"
" AND plugin_status='ACTIVE'";
std::string xb_plugin_config;
static void add_to_plugin_load_list(const char *plugin_def)
{
opt_plugin_load_list_ptr->push_back(new i_string(plugin_def));
}
static char XTRABACKUP_EXE[] = "xtrabackup";
/*
Read "plugin-load" value from backup-my.cnf during prepare phase.
The value is stored during backup phase.
*/
static std::string get_plugin_from_cnf(const char *dir)
{
std::string path = dir + std::string("/backup-my.cnf");
FILE *f = fopen(path.c_str(), "r");
if (!f)
{
die("Can't open %s for reading", path.c_str());
}
char line[512];
std::string plugin_load;
while (fgets(line, sizeof(line), f))
{
if (strncmp(line, "plugin_load=", 12) == 0)
{
plugin_load = line + 12;
// remote \n at the end of string
plugin_load.resize(plugin_load.size() - 1);
break;
}
}
fclose(f);
return plugin_load;
}
void xb_plugin_backup_init(MYSQL *mysql)
{
MYSQL_RES *result;
MYSQL_ROW row;
std::ostringstream oss;
char *argv[PLUGIN_MAX_ARGS];
char show_query[1024] = "";
std::string plugin_load;
int argc;
result = xb_mysql_query(mysql, QUERY_PLUGIN, true, true);
while ((row = mysql_fetch_row(result)))
{
char *name= row[0];
char *library= row[1];
char *dir= row[2];
if (!plugin_load.length())
{
#ifdef _WIN32
for (char *p = dir; *p; p++)
if (*p == '\\') *p = '/';
#endif
strncpy(opt_plugin_dir, dir, FN_REFLEN - 1);
opt_plugin_dir[FN_REFLEN - 1] = '\0';
oss << "plugin_dir=" << '"' << dir << '"' << std::endl;
}
plugin_load += std::string(";") + name;
if (library)
{
/* Remove shared library suffixes, in case we'll prepare on different OS.*/
const char *extensions[] = { ".dll", ".so", 0 };
for (size_t i = 0; extensions[i]; i++)
{
const char *ext = extensions[i];
if (ends_with(library, ext))
library[strlen(library) - strlen(ext)] = 0;
}
plugin_load += std::string("=") + library;
}
if (strncmp(name, "provider_", 9) == 0)
continue;
/* Read plugin variables. */
snprintf(show_query, sizeof(show_query), "SHOW variables like '%s_%%'", name);
}
mysql_free_result(result);
if (!plugin_load.length())
return;
oss << "plugin_load=" << plugin_load.c_str() + 1 << std::endl;
/* Required to load the plugin later.*/
add_to_plugin_load_list(plugin_load.c_str() + 1);
if (*show_query)
{
result = xb_mysql_query(mysql, show_query, true, true);
while ((row = mysql_fetch_row(result)))
{
std::string arg("--");
arg += row[0];
arg += "=";
arg += row[1];
backup_plugins_args.push_back(arg);
oss << row[0] << "=" << row[1] << std::endl;
}
mysql_free_result(result);
/* Check whether to encrypt logs. */
result = xb_mysql_query(mysql, "select @@innodb_encrypt_log", true, true);
row = mysql_fetch_row(result);
srv_encrypt_log = (row != 0 && row[0][0] == '1');
oss << "innodb_encrypt_log=" << row[0] << std::endl;
mysql_free_result(result);
}
xb_plugin_config = oss.str();
argc = 0;
argv[argc++] = XTRABACKUP_EXE;
for(size_t i = 0; i < backup_plugins_args.size(); i++)
{
argv[argc++] = (char *)backup_plugins_args[i].c_str();
if (argc == PLUGIN_MAX_ARGS - 2)
break;
}
argv[argc] = 0;
xb_plugin_init(argc, argv);
}
const char *xb_plugin_get_config()
{
return xb_plugin_config.c_str();
}
extern int finalize_encryption_plugin(st_plugin_int *plugin);
void xb_plugin_prepare_init(int argc, char **argv, const char *dir)
{
std::string plugin_load= get_plugin_from_cnf(dir ? dir : ".");
if (plugin_load.size())
{
msg("Loading plugins from %s", plugin_load.c_str());
}
else
{
finalize_encryption_plugin(0);
return;
}
add_to_plugin_load_list(plugin_load.c_str());
if (xb_plugin_dir)
{
strncpy(opt_plugin_dir, xb_plugin_dir, FN_REFLEN - 1);
opt_plugin_dir[FN_REFLEN - 1] = '\0';
}
char **new_argv = new char *[argc + 2];
new_argv[0] = XTRABACKUP_EXE;
memcpy(&new_argv[1], argv, argc*sizeof(char *));
xb_plugin_init(argc+1, new_argv);
delete[] new_argv;
}
static void xb_plugin_init(int argc, char **argv)
{
/* Patch optional and mandatory plugins, we only need to load the one in xb_plugin_load. */
mysql_optional_plugins[0] = mysql_mandatory_plugins[0] = 0;
plugin_maturity = MariaDB_PLUGIN_MATURITY_UNKNOWN; /* mariabackup accepts all plugins */
msg("Loading plugins");
for (int i= 1; i < argc; i++)
msg("\t Plugin parameter : '%s'", argv[i]);
plugin_init(&argc, argv, PLUGIN_INIT_SKIP_PLUGIN_TABLE);
}
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