396b81f336
The internal header directory conflicted with in-source builds causing a build failure. This is fixed by renaming the internal header directory to something other than maxscale. The renaming pointed out a few problems in a couple of source files that appeared to include internal headers when the headers were in fact public headers. Fixed maxctrl in-source builds by making the copying of the sources optional.
820 lines
18 KiB
C++
820 lines
18 KiB
C++
/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2020-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include "internal/query_classifier.h"
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#include <maxscale/log_manager.h>
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#include <maxscale/modutil.h>
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#include <maxscale/alloc.h>
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#include <maxscale/platform.h>
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#include <maxscale/pcre2.h>
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#include <maxscale/utils.h>
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#include "internal/modules.h"
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#include "internal/trxboundaryparser.hh"
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//#define QC_TRACE_ENABLED
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#undef QC_TRACE_ENABLED
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#if defined(QC_TRACE_ENABLED)
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#define QC_TRACE() MXS_NOTICE(__func__)
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#else
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#define QC_TRACE()
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#endif
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struct type_name_info
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{
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const char* name;
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size_t name_len;
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};
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static const char DEFAULT_QC_NAME[] = "qc_sqlite";
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static const char QC_TRX_PARSE_USING[] = "QC_TRX_PARSE_USING";
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static QUERY_CLASSIFIER* classifier;
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static qc_trx_parse_using_t qc_trx_parse_using = QC_TRX_PARSE_USING_PARSER;
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bool qc_setup(const char* plugin_name, qc_sql_mode_t sql_mode, const char* plugin_args)
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{
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QC_TRACE();
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ss_dassert(!classifier);
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if (!plugin_name || (*plugin_name == 0))
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{
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MXS_NOTICE("No query classifier specified, using default '%s'.", DEFAULT_QC_NAME);
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plugin_name = DEFAULT_QC_NAME;
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}
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int32_t rv = QC_RESULT_ERROR;
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classifier = qc_load(plugin_name);
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if (classifier)
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{
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rv = classifier->qc_setup(sql_mode, plugin_args);
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if (rv != QC_RESULT_OK)
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{
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qc_unload(classifier);
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}
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}
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return (rv == QC_RESULT_OK) ? true : false;
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}
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bool qc_process_init(uint32_t kind)
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{
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QC_TRACE();
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ss_dassert(classifier);
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const char* parse_using = getenv(QC_TRX_PARSE_USING);
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if (parse_using)
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{
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if (strcmp(parse_using, "QC_TRX_PARSE_USING_QC") == 0)
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{
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qc_trx_parse_using = QC_TRX_PARSE_USING_QC;
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MXS_NOTICE("Transaction detection using QC.");
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}
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else if (strcmp(parse_using, "QC_TRX_PARSE_USING_PARSER") == 0)
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{
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qc_trx_parse_using = QC_TRX_PARSE_USING_PARSER;
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MXS_NOTICE("Transaction detection using custom PARSER.");
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}
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else
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{
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MXS_NOTICE("QC_TRX_PARSE_USING set, but the value %s is not known. "
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"Parsing using QC.", parse_using);
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}
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}
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bool rc = qc_thread_init(QC_INIT_SELF);
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if (rc)
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{
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if (kind & QC_INIT_PLUGIN)
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{
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rc = classifier->qc_process_init() == 0;
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if (!rc)
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{
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qc_thread_end(QC_INIT_SELF);
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}
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}
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}
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return rc;
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}
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void qc_process_end(uint32_t kind)
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{
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QC_TRACE();
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ss_dassert(classifier);
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if (kind & QC_INIT_PLUGIN)
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{
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classifier->qc_process_end();
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}
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qc_thread_end(QC_INIT_SELF);
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}
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QUERY_CLASSIFIER* qc_load(const char* plugin_name)
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{
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void* module = load_module(plugin_name, MODULE_QUERY_CLASSIFIER);
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if (module)
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{
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MXS_INFO("%s loaded.", plugin_name);
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}
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else
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{
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MXS_ERROR("Could not load %s.", plugin_name);
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}
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return (QUERY_CLASSIFIER*) module;
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}
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void qc_unload(QUERY_CLASSIFIER* classifier)
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{
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// TODO: The module loading/unloading needs an overhaul before we
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// TODO: actually can unload something.
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classifier = NULL;
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}
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bool qc_thread_init(uint32_t kind)
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{
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QC_TRACE();
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ss_dassert(classifier);
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bool rc = true;
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if (kind & QC_INIT_PLUGIN)
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{
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rc = classifier->qc_thread_init() == 0;
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}
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return rc;
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}
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void qc_thread_end(uint32_t kind)
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{
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QC_TRACE();
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ss_dassert(classifier);
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if (kind & QC_INIT_PLUGIN)
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{
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classifier->qc_thread_end();
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}
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}
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qc_parse_result_t qc_parse(GWBUF* query, uint32_t collect)
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{
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QC_TRACE();
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ss_dassert(classifier);
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int32_t result = QC_QUERY_INVALID;
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classifier->qc_parse(query, collect, &result);
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return (qc_parse_result_t)result;
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}
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uint32_t qc_get_type_mask(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(classifier);
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uint32_t type_mask = QUERY_TYPE_UNKNOWN;
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classifier->qc_get_type_mask(query, &type_mask);
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return type_mask;
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}
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qc_query_op_t qc_get_operation(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(classifier);
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int32_t op = QUERY_OP_UNDEFINED;
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classifier->qc_get_operation(query, &op);
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return (qc_query_op_t)op;
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}
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char* qc_get_created_table_name(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(classifier);
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char* name = NULL;
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classifier->qc_get_created_table_name(query, &name);
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return name;
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}
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bool qc_is_drop_table_query(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(classifier);
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int32_t is_drop_table = 0;
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classifier->qc_is_drop_table_query(query, &is_drop_table);
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return (is_drop_table != 0) ? true : false;
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}
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char** qc_get_table_names(GWBUF* query, int* tblsize, bool fullnames)
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{
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QC_TRACE();
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ss_dassert(classifier);
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char** names = NULL;
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*tblsize = 0;
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classifier->qc_get_table_names(query, fullnames, &names, tblsize);
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return names;
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}
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char* qc_get_canonical(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(classifier);
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char *rval;
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if (classifier->qc_get_canonical)
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{
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classifier->qc_get_canonical(query, &rval);
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}
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else
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{
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rval = modutil_get_canonical(query);
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}
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if (rval)
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{
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squeeze_whitespace(rval);
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}
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return rval;
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}
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bool qc_query_has_clause(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(classifier);
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int32_t has_clause = 0;
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classifier->qc_query_has_clause(query, &has_clause);
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return (has_clause != 0) ? true : false;
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}
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void qc_get_field_info(GWBUF* query, const QC_FIELD_INFO** infos, size_t* n_infos)
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{
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QC_TRACE();
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ss_dassert(classifier);
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*infos = NULL;
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uint32_t n = 0;
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classifier->qc_get_field_info(query, infos, &n);
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*n_infos = n;
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}
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void qc_get_function_info(GWBUF* query, const QC_FUNCTION_INFO** infos, size_t* n_infos)
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{
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QC_TRACE();
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ss_dassert(classifier);
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*infos = NULL;
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uint32_t n = 0;
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classifier->qc_get_function_info(query, infos, &n);
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*n_infos = n;
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}
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char** qc_get_database_names(GWBUF* query, int* sizep)
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{
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QC_TRACE();
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ss_dassert(classifier);
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char** names = NULL;
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*sizep = 0;
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classifier->qc_get_database_names(query, &names, sizep);
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return names;
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}
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char* qc_get_prepare_name(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(classifier);
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char* name = NULL;
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classifier->qc_get_prepare_name(query, &name);
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return name;
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}
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GWBUF* qc_get_preparable_stmt(GWBUF* stmt)
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{
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QC_TRACE();
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ss_dassert(classifier);
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GWBUF* preparable_stmt = NULL;
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classifier->qc_get_preparable_stmt(stmt, &preparable_stmt);
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return preparable_stmt;
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}
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const char* qc_op_to_string(qc_query_op_t op)
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{
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switch (op)
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{
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case QUERY_OP_UNDEFINED:
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return "QUERY_OP_UNDEFINED";
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case QUERY_OP_ALTER:
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return "QUERY_OP_ALTER";
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case QUERY_OP_CALL:
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return "QUERY_OP_CALL";
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case QUERY_OP_CHANGE_DB:
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return "QUERY_OP_CHANGE_DB";
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case QUERY_OP_CREATE:
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return "QUERY_OP_CREATE";
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case QUERY_OP_DELETE:
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return "QUERY_OP_DELETE";
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case QUERY_OP_DROP:
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return "QUERY_OP_DROP";
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case QUERY_OP_EXPLAIN:
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return "QUERY_OP_EXPLAIN";
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case QUERY_OP_GRANT:
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return "QUERY_OP_GRANT";
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case QUERY_OP_INSERT:
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return "QUERY_OP_INSERT";
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case QUERY_OP_LOAD:
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return "QUERY_OP_LOAD";
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case QUERY_OP_REVOKE:
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return "QUERY_OP_REVOKE";
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case QUERY_OP_SELECT:
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return "QUERY_OP_SELECT";
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case QUERY_OP_SHOW:
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return "QUERY_OP_SHOW";
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case QUERY_OP_TRUNCATE:
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return "QUERY_OP_TRUNCATE";
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case QUERY_OP_UPDATE:
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return "QUERY_OP_UPDATE";
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default:
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return "UNKNOWN_QUERY_OP";
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}
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}
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struct type_name_info type_to_type_name_info(qc_query_type_t type)
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{
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struct type_name_info info;
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switch (type)
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{
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case QUERY_TYPE_UNKNOWN:
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{
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static const char name[] = "QUERY_TYPE_UNKNOWN";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_LOCAL_READ:
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{
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static const char name[] = "QUERY_TYPE_LOCAL_READ";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_READ:
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{
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static const char name[] = "QUERY_TYPE_READ";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_WRITE:
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{
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static const char name[] = "QUERY_TYPE_WRITE";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_MASTER_READ:
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{
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static const char name[] = "QUERY_TYPE_MASTER_READ";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_SESSION_WRITE:
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{
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static const char name[] = "QUERY_TYPE_SESSION_WRITE";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_USERVAR_WRITE:
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{
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static const char name[] = "QUERY_TYPE_USERVAR_WRITE";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_USERVAR_READ:
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{
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static const char name[] = "QUERY_TYPE_USERVAR_READ";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_SYSVAR_READ:
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{
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static const char name[] = "QUERY_TYPE_SYSVAR_READ";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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/** Not implemented yet */
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//case QUERY_TYPE_SYSVAR_WRITE:
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case QUERY_TYPE_GSYSVAR_READ:
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{
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static const char name[] = "QUERY_TYPE_GSYSVAR_READ";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_GSYSVAR_WRITE:
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{
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static const char name[] = "QUERY_TYPE_GSYSVAR_WRITE";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_BEGIN_TRX:
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{
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static const char name[] = "QUERY_TYPE_BEGIN_TRX";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_ENABLE_AUTOCOMMIT:
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{
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static const char name[] = "QUERY_TYPE_ENABLE_AUTOCOMMIT";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_DISABLE_AUTOCOMMIT:
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{
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static const char name[] = "QUERY_TYPE_DISABLE_AUTOCOMMIT";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_ROLLBACK:
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{
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static const char name[] = "QUERY_TYPE_ROLLBACK";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_COMMIT:
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{
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static const char name[] = "QUERY_TYPE_COMMIT";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_PREPARE_NAMED_STMT:
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{
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static const char name[] = "QUERY_TYPE_PREPARE_NAMED_STMT";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_PREPARE_STMT:
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{
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static const char name[] = "QUERY_TYPE_PREPARE_STMT";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_EXEC_STMT:
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{
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static const char name[] = "QUERY_TYPE_EXEC_STMT";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_CREATE_TMP_TABLE:
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{
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static const char name[] = "QUERY_TYPE_CREATE_TMP_TABLE";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_READ_TMP_TABLE:
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{
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static const char name[] = "QUERY_TYPE_READ_TMP_TABLE";
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info.name = name;
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info.name_len = sizeof(name) - 1;
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}
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break;
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case QUERY_TYPE_SHOW_DATABASES:
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|
{
|
|
static const char name[] = "QUERY_TYPE_SHOW_DATABASES";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_SHOW_TABLES:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_SHOW_TABLES";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
static const char name[] = "UNKNOWN_QUERY_TYPE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return info;
|
|
}
|
|
|
|
|
|
const char* qc_type_to_string(qc_query_type_t type)
|
|
{
|
|
return type_to_type_name_info(type).name;
|
|
}
|
|
|
|
static const qc_query_type_t QUERY_TYPES[] =
|
|
{
|
|
/* Excluded by design */
|
|
//QUERY_TYPE_UNKNOWN,
|
|
QUERY_TYPE_LOCAL_READ,
|
|
QUERY_TYPE_READ,
|
|
QUERY_TYPE_WRITE,
|
|
QUERY_TYPE_MASTER_READ,
|
|
QUERY_TYPE_SESSION_WRITE,
|
|
QUERY_TYPE_USERVAR_WRITE,
|
|
QUERY_TYPE_USERVAR_READ,
|
|
QUERY_TYPE_SYSVAR_READ,
|
|
/** Not implemented yet */
|
|
//QUERY_TYPE_SYSVAR_WRITE,
|
|
QUERY_TYPE_GSYSVAR_READ,
|
|
QUERY_TYPE_GSYSVAR_WRITE,
|
|
QUERY_TYPE_BEGIN_TRX,
|
|
QUERY_TYPE_ENABLE_AUTOCOMMIT,
|
|
QUERY_TYPE_DISABLE_AUTOCOMMIT,
|
|
QUERY_TYPE_ROLLBACK,
|
|
QUERY_TYPE_COMMIT,
|
|
QUERY_TYPE_PREPARE_NAMED_STMT,
|
|
QUERY_TYPE_PREPARE_STMT,
|
|
QUERY_TYPE_EXEC_STMT,
|
|
QUERY_TYPE_CREATE_TMP_TABLE,
|
|
QUERY_TYPE_READ_TMP_TABLE,
|
|
QUERY_TYPE_SHOW_DATABASES,
|
|
QUERY_TYPE_SHOW_TABLES,
|
|
};
|
|
|
|
static const int N_QUERY_TYPES = sizeof(QUERY_TYPES) / sizeof(QUERY_TYPES[0]);
|
|
static const int QUERY_TYPE_MAX_LEN = 29; // strlen("QUERY_TYPE_PREPARE_NAMED_STMT");
|
|
|
|
char* qc_typemask_to_string(uint32_t types)
|
|
{
|
|
int len = 0;
|
|
|
|
// First calculate how much space will be needed.
|
|
for (int i = 0; i < N_QUERY_TYPES; ++i)
|
|
{
|
|
if (types & QUERY_TYPES[i])
|
|
{
|
|
if (len != 0)
|
|
{
|
|
++len; // strlen("|");
|
|
}
|
|
|
|
len += QUERY_TYPE_MAX_LEN;
|
|
}
|
|
}
|
|
|
|
++len;
|
|
|
|
// Then make one allocation and build the string.
|
|
char* s = (char*) MXS_MALLOC(len);
|
|
|
|
if (s)
|
|
{
|
|
if (len > 1)
|
|
{
|
|
char* p = s;
|
|
|
|
for (int i = 0; i < N_QUERY_TYPES; ++i)
|
|
{
|
|
qc_query_type_t type = QUERY_TYPES[i];
|
|
|
|
if (types & type)
|
|
{
|
|
if (p != s)
|
|
{
|
|
strcpy(p, "|");
|
|
++p;
|
|
}
|
|
|
|
struct type_name_info info = type_to_type_name_info(type);
|
|
|
|
strcpy(p, info.name);
|
|
p += info.name_len;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*s = 0;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static uint32_t qc_get_trx_type_mask_using_qc(GWBUF* stmt)
|
|
{
|
|
uint32_t type_mask = qc_get_type_mask(stmt);
|
|
|
|
if (qc_query_is_type(type_mask, QUERY_TYPE_WRITE) &&
|
|
qc_query_is_type(type_mask, QUERY_TYPE_COMMIT))
|
|
{
|
|
// This is a commit reported for "CREATE TABLE...",
|
|
// "DROP TABLE...", etc. that cause an implicit commit.
|
|
type_mask = 0;
|
|
}
|
|
else
|
|
{
|
|
// Only START TRANSACTION can be explicitly READ or WRITE.
|
|
if (!(type_mask & QUERY_TYPE_BEGIN_TRX))
|
|
{
|
|
// So, strip them away for everything else.
|
|
type_mask &= ~(QUERY_TYPE_WRITE | QUERY_TYPE_READ);
|
|
}
|
|
|
|
// Then leave only the bits related to transaction and
|
|
// autocommit state.
|
|
type_mask &= (QUERY_TYPE_BEGIN_TRX |
|
|
QUERY_TYPE_WRITE |
|
|
QUERY_TYPE_READ |
|
|
QUERY_TYPE_COMMIT |
|
|
QUERY_TYPE_ROLLBACK |
|
|
QUERY_TYPE_ENABLE_AUTOCOMMIT |
|
|
QUERY_TYPE_DISABLE_AUTOCOMMIT);
|
|
}
|
|
|
|
return type_mask;
|
|
}
|
|
|
|
static uint32_t qc_get_trx_type_mask_using_parser(GWBUF* stmt)
|
|
{
|
|
maxscale::TrxBoundaryParser parser;
|
|
|
|
return parser.type_mask_of(stmt);
|
|
}
|
|
|
|
uint32_t qc_get_trx_type_mask_using(GWBUF* stmt, qc_trx_parse_using_t use)
|
|
{
|
|
uint32_t type_mask = 0;
|
|
|
|
switch (use)
|
|
{
|
|
case QC_TRX_PARSE_USING_QC:
|
|
type_mask = qc_get_trx_type_mask_using_qc(stmt);
|
|
break;
|
|
|
|
case QC_TRX_PARSE_USING_PARSER:
|
|
type_mask = qc_get_trx_type_mask_using_parser(stmt);
|
|
break;
|
|
|
|
default:
|
|
ss_dassert(!true);
|
|
}
|
|
|
|
return type_mask;
|
|
}
|
|
|
|
uint32_t qc_get_trx_type_mask(GWBUF* stmt)
|
|
{
|
|
return qc_get_trx_type_mask_using(stmt, qc_trx_parse_using);
|
|
}
|
|
|
|
void qc_set_server_version(uint64_t version)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(classifier);
|
|
|
|
classifier->qc_set_server_version(version);
|
|
}
|
|
|
|
uint64_t qc_get_server_version()
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(classifier);
|
|
|
|
uint64_t version;
|
|
|
|
classifier->qc_get_server_version(&version);
|
|
|
|
return version;
|
|
}
|
|
|
|
qc_sql_mode_t qc_get_sql_mode()
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(classifier);
|
|
|
|
qc_sql_mode_t sql_mode;
|
|
|
|
ss_debug(int32_t rv = ) classifier->qc_get_sql_mode(&sql_mode);
|
|
ss_dassert(rv == QC_RESULT_OK);
|
|
|
|
return sql_mode;
|
|
}
|
|
|
|
void qc_set_sql_mode(qc_sql_mode_t sql_mode)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(classifier);
|
|
|
|
ss_debug(int32_t rv = ) classifier->qc_set_sql_mode(sql_mode);
|
|
ss_dassert(rv == QC_RESULT_OK);
|
|
}
|