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MySQL_Session.cpp
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MySQL_Session.cpp
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#include "MySQL_HostGroups_Manager.h"
#include "MySQL_Thread.h"
#include "proxysql.h"
#include "cpp.h"
#include "proxysql_utils.h"
#include "re2/re2.h"
#include "re2/regexp.h"
#include "mysqld_error.h"
#include "set_parser.h"
#include "MySQL_Data_Stream.h"
#include "query_processor.h"
#include "MySQL_PreparedStatement.h"
#include "MySQL_Logger.hpp"
#include "StatCounters.h"
#include "MySQL_Authentication.hpp"
#include "MySQL_LDAP_Authentication.hpp"
#include "MySQL_Protocol.h"
#include "SQLite3_Server.h"
#include "MySQL_Variables.h"
#include "ProxySQL_Cluster.hpp"
#include "libinjection.h"
#include "libinjection_sqli.h"
#define SELECT_VERSION_COMMENT "select @@version_comment limit 1"
#define SELECT_VERSION_COMMENT_LEN 32
#define PROXYSQL_VERSION_COMMENT "\x01\x00\x00\x01\x01\x27\x00\x00\x02\x03\x64\x65\x66\x00\x00\x00\x11\x40\x40\x76\x65\x72\x73\x69\x6f\x6e\x5f\x63\x6f\x6d\x6d\x65\x6e\x74\x00\x0c\x21\x00\x18\x00\x00\x00\xfd\x00\x00\x1f\x00\x00\x05\x00\x00\x03\xfe\x00\x00\x02\x00\x0b\x00\x00\x04\x0a(ProxySQL)\x05\x00\x00\x05\xfe\x00\x00\x02\x00"
#define PROXYSQL_VERSION_COMMENT_LEN 81
// PROXYSQL_VERSION_COMMENT_WITH_OK is sent instead of PROXYSQL_VERSION_COMMENT
// if Client supports CLIENT_DEPRECATE_EOF
#define PROXYSQL_VERSION_COMMENT_WITH_OK "\x01\x00\x00\x01\x01" \
"\x27\x00\x00\x02\x03\x64\x65\x66\x00\x00\x00\x11\x40\x40\x76\x65\x72\x73\x69\x6f\x6e\x5f\x63\x6f\x6d\x6d\x65\x6e\x74\x00\x0c\x21\x00\x18\x00\x00\x00\xfd\x00\x00\x1f\x00\x00" \
"\x0b\x00\x00\x03\x0a(ProxySQL)" \
"\x07\x00\x00\x04\xfe\x00\x00\x02\x00\x00\x00"
#define PROXYSQL_VERSION_COMMENT_WITH_OK_LEN 74
#define SELECT_CONNECTION_ID "SELECT CONNECTION_ID()"
#define SELECT_CONNECTION_ID_LEN 22
#define SELECT_LAST_INSERT_ID "SELECT LAST_INSERT_ID()"
#define SELECT_LAST_INSERT_ID_LEN 23
#define SELECT_LAST_INSERT_ID_LIMIT1 "SELECT LAST_INSERT_ID() LIMIT 1"
#define SELECT_LAST_INSERT_ID_LIMIT1_LEN 31
#define SELECT_VARIABLE_IDENTITY "SELECT @@IDENTITY"
#define SELECT_VARIABLE_IDENTITY_LEN 17
#define SELECT_VARIABLE_IDENTITY_LIMIT1 "SELECT @@IDENTITY LIMIT 1"
#define SELECT_VARIABLE_IDENTITY_LIMIT1_LEN 25
#define EXPMARIA
using std::function;
using std::vector;
static inline char is_digit(char c) {
if(c >= '0' && c <= '9')
return 1;
return 0;
}
static inline char is_normal_char(char c) {
if(c >= 'a' && c <= 'z')
return 1;
if(c >= 'A' && c <= 'Z')
return 1;
if(c >= '0' && c <= '9')
return 1;
if(c == '$' || c == '_')
return 1;
return 0;
}
static const std::set<std::string> mysql_variables_boolean = {
"aurora_read_replica_read_committed",
"foreign_key_checks",
"innodb_strict_mode",
"innodb_table_locks",
"sql_auto_is_null",
"sql_big_selects",
"sql_generate_invisible_primary_key",
"sql_log_bin",
"sql_require_primary_key",
"sql_safe_updates",
"unique_checks",
};
static const std::set<std::string> mysql_variables_numeric = {
"auto_increment_increment",
"auto_increment_offset",
"group_concat_max_len",
"innodb_lock_wait_timeout",
"join_buffer_size",
"lock_wait_timeout",
"long_query_time",
"max_execution_time",
"max_heap_table_size",
"max_join_size",
"max_sort_length",
"max_statement_time",
"optimizer_prune_level",
"optimizer_search_depth",
"optimizer_use_condition_selectivity",
"query_cache_type",
"sort_buffer_size",
"sql_select_limit",
"timestamp",
"tmp_table_size",
"wsrep_sync_wait"
};
static const std::set<std::string> mysql_variables_strings = {
"default_storage_engine",
"default_tmp_storage_engine",
"group_replication_consistency",
"lc_messages",
"lc_time_names",
"optimizer_switch",
"wsrep_osu_method",
};
extern MARIADB_CHARSET_INFO * proxysql_find_charset_name(const char * const name);
extern MARIADB_CHARSET_INFO * proxysql_find_charset_collate_names(const char *csname, const char *collatename);
extern const MARIADB_CHARSET_INFO * proxysql_find_charset_nr(unsigned int nr);
extern MARIADB_CHARSET_INFO * proxysql_find_charset_collate(const char *collatename);
extern MySQL_Authentication *GloMyAuth;
extern MySQL_LDAP_Authentication *GloMyLdapAuth;
extern ProxySQL_Admin *GloAdmin;
extern MySQL_Logger *GloMyLogger;
extern MySQL_STMT_Manager_v14 *GloMyStmt;
extern SQLite3_Server *GloSQLite3Server;
#ifdef PROXYSQLCLICKHOUSE
extern ClickHouse_Authentication *GloClickHouseAuth;
extern ClickHouse_Server *GloClickHouseServer;
#endif /* PROXYSQLCLICKHOUSE */
std::string proxysql_session_type_str(enum proxysql_session_type session_type) {
if (session_type == PROXYSQL_SESSION_MYSQL) {
return "PROXYSQL_SESSION_MYSQL";
} else if (session_type == PROXYSQL_SESSION_ADMIN) {
return "PROXYSQL_SESSION_ADMIN";
} else if (session_type == PROXYSQL_SESSION_STATS) {
return "PROXYSQL_SESSION_STATS";
} else if (session_type == PROXYSQL_SESSION_SQLITE) {
return "PROXYSQL_SESSION_SQLITE";
} else if (session_type == PROXYSQL_SESSION_CLICKHOUSE) {
return "PROXYSQL_SESSION_CLICKHOUSE";
} else if (session_type == PROXYSQL_SESSION_MYSQL_EMU) {
return "PROXYSQL_SESSION_MYSQL_EMU";
} else {
return "PROXYSQL_SESSION_NONE";
}
};
Session_Regex::Session_Regex(char *p) {
s=strdup(p);
re2::RE2::Options *opt2=new re2::RE2::Options(RE2::Quiet);
opt2->set_case_sensitive(false);
opt=(void *)opt2;
re=(RE2 *)new RE2(s, *opt2);
}
Session_Regex::~Session_Regex() {
free(s);
delete (RE2 *)re;
delete (re2::RE2::Options *)opt;
}
bool Session_Regex::match(char *m) {
bool rc=false;
rc=RE2::PartialMatch(m,*(RE2 *)re);
return rc;
}
KillArgs::KillArgs(char* u, char* p, char* h, unsigned int P, unsigned int _hid, unsigned long i, int kt, MySQL_Thread* _mt) :
KillArgs(u, p, h, P, _hid, i, kt, _mt, NULL) {
// resolving DNS if available in Cache
if (h && P) {
const std::string& ip = MySQL_Monitor::dns_lookup(h, false);
if (ip.empty() == false) {
ip_addr = strdup(ip.c_str());
}
}
}
KillArgs::KillArgs(char *u, char *p, char *h, unsigned int P, unsigned int _hid, unsigned long i, int kt, MySQL_Thread *_mt, char *ip) {
username=strdup(u);
password=strdup(p);
hostname=strdup(h);
ip_addr = NULL;
if (ip)
ip_addr = strdup(ip);
port=P;
hid=_hid;
id=i;
kill_type=kt;
mt=_mt;
}
KillArgs::~KillArgs() {
free(username);
free(password);
free(hostname);
if (ip_addr)
free(ip_addr);
}
const char* KillArgs::get_host_address() const {
const char* host_address = hostname;
if (ip_addr)
host_address = ip_addr;
return host_address;
}
void * kill_query_thread(void *arg) {
KillArgs *ka=(KillArgs *)arg;
MYSQL *mysql;
MySQL_Thread * thread = ka->mt;
mysql=mysql_init(NULL);
mysql_options4(mysql, MYSQL_OPT_CONNECT_ATTR_ADD, "program_name", "proxysql_killer");
mysql_options4(mysql, MYSQL_OPT_CONNECT_ATTR_ADD, "_server_host", ka->hostname);
if (!mysql) {
goto __exit_kill_query_thread;
}
MYSQL *ret;
if (ka->port) {
switch (ka->kill_type) {
case KILL_QUERY:
proxy_warning("KILL QUERY %lu on %s:%d\n", ka->id, ka->hostname, ka->port);
if (thread) {
thread->status_variables.stvar[st_var_killed_queries]++;
}
break;
case KILL_CONNECTION:
proxy_warning("KILL CONNECTION %lu on %s:%d\n", ka->id, ka->hostname, ka->port);
if (thread) {
thread->status_variables.stvar[st_var_killed_connections]++;
}
break;
default:
break;
}
ret=mysql_real_connect(mysql, ka->get_host_address(), ka->username, ka->password, NULL, ka->port, NULL, 0);
} else {
switch (ka->kill_type) {
case KILL_QUERY:
proxy_warning("KILL QUERY %lu on localhost\n", ka->id);
break;
case KILL_CONNECTION:
proxy_warning("KILL CONNECTION %lu on localhost\n", ka->id);
break;
default:
break;
}
ret=mysql_real_connect(mysql,"localhost",ka->username,ka->password,NULL,0,ka->hostname,0);
}
if (!ret) {
proxy_error("Failed to connect to server %s:%d to run KILL %s %lu: Error: %s\n" , ka->hostname, ka->port, ( ka->kill_type==KILL_QUERY ? "QUERY" : "CONNECTION" ) , ka->id, mysql_error(mysql));
MyHGM->p_update_mysql_error_counter(p_mysql_error_type::mysql, ka->hid, ka->hostname, ka->port, mysql_errno(mysql));
goto __exit_kill_query_thread;
}
MySQL_Monitor::update_dns_cache_from_mysql_conn(mysql);
char buf[100];
switch (ka->kill_type) {
case KILL_QUERY:
sprintf(buf,"KILL QUERY %lu", ka->id);
break;
case KILL_CONNECTION:
sprintf(buf,"KILL CONNECTION %lu", ka->id);
break;
default:
sprintf(buf,"KILL %lu", ka->id);
break;
}
// FIXME: these 2 calls are blocking, fortunately on their own thread
mysql_query(mysql,buf);
__exit_kill_query_thread:
if (mysql)
mysql_close(mysql);
delete ka;
return NULL;
}
extern Query_Processor *GloQPro;
extern Query_Cache *GloQC;
extern ProxySQL_Admin *GloAdmin;
extern MySQL_Threads_Handler *GloMTH;
Query_Info::Query_Info() {
MyComQueryCmd=MYSQL_COM_QUERY___NONE;
QueryPointer=NULL;
QueryLength=0;
QueryParserArgs.digest_text=NULL;
QueryParserArgs.first_comment=NULL;
stmt_info=NULL;
bool_is_select_NOT_for_update=false;
bool_is_select_NOT_for_update_computed=false;
have_affected_rows=false; // if affected rows is set, last_insert_id is set too
waiting_since = 0;
affected_rows=0;
last_insert_id = 0;
rows_sent=0;
start_time=0;
end_time=0;
stmt_client_id=0;
}
Query_Info::~Query_Info() {
GloQPro->query_parser_free(&QueryParserArgs);
if (stmt_info) {
stmt_info=NULL;
}
}
void Query_Info::begin(unsigned char *_p, int len, bool mysql_header) {
MyComQueryCmd=MYSQL_COM_QUERY___NONE;
QueryPointer=NULL;
QueryLength=0;
mysql_stmt=NULL;
stmt_meta=NULL;
QueryParserArgs.digest_text=NULL;
QueryParserArgs.first_comment=NULL;
start_time=sess->thread->curtime;
init(_p, len, mysql_header);
if (mysql_thread___commands_stats || mysql_thread___query_digests) {
query_parser_init();
if (mysql_thread___commands_stats)
query_parser_command_type();
}
bool_is_select_NOT_for_update=false;
bool_is_select_NOT_for_update_computed=false;
have_affected_rows=false; // if affected rows is set, last_insert_id is set too
waiting_since = 0;
affected_rows=0;
last_insert_id = 0;
rows_sent=0;
sess->gtid_hid=-1;
stmt_client_id=0;
}
void Query_Info::end() {
query_parser_update_counters();
query_parser_free();
if ((end_time-start_time) > (unsigned int)mysql_thread___long_query_time*1000) {
__sync_add_and_fetch(&sess->thread->status_variables.stvar[st_var_queries_slow],1);
}
if (sess->with_gtid) {
__sync_add_and_fetch(&sess->thread->status_variables.stvar[st_var_queries_gtid],1);
}
assert(mysql_stmt==NULL);
if (stmt_info) {
stmt_info=NULL;
}
if (stmt_meta) { // fix bug #796: memory is not freed in case of error during STMT_EXECUTE
if (stmt_meta->pkt) {
uint32_t stmt_global_id=0;
memcpy(&stmt_global_id,(char *)(stmt_meta->pkt)+5,sizeof(uint32_t));
sess->SLDH->reset(stmt_global_id);
free(stmt_meta->pkt);
stmt_meta->pkt=NULL;
}
stmt_meta = NULL;
}
}
void Query_Info::init(unsigned char *_p, int len, bool mysql_header) {
QueryLength=(mysql_header ? len-5 : len);
QueryPointer=(mysql_header ? _p+5 : _p);
MyComQueryCmd = MYSQL_COM_QUERY__UNINITIALIZED;
bool_is_select_NOT_for_update=false;
bool_is_select_NOT_for_update_computed=false;
have_affected_rows=false; // if affected rows is set, last_insert_id is set too
waiting_since = 0;
affected_rows=0;
last_insert_id = 0;
rows_sent=0;
}
void Query_Info::query_parser_init() {
GloQPro->query_parser_init(&QueryParserArgs,(char *)QueryPointer,QueryLength,0);
}
enum MYSQL_COM_QUERY_command Query_Info::query_parser_command_type() {
MyComQueryCmd=GloQPro->query_parser_command_type(&QueryParserArgs);
return MyComQueryCmd;
}
void Query_Info::query_parser_free() {
GloQPro->query_parser_free(&QueryParserArgs);
}
unsigned long long Query_Info::query_parser_update_counters() {
if (stmt_info) {
MyComQueryCmd=stmt_info->MyComQueryCmd;
}
if (MyComQueryCmd==MYSQL_COM_QUERY___NONE) return 0; // this means that it was never initialized
if (MyComQueryCmd == MYSQL_COM_QUERY__UNINITIALIZED) return 0; // this means that it was never initialized
unsigned long long ret=GloQPro->query_parser_update_counters(sess, MyComQueryCmd, &QueryParserArgs, end_time-start_time);
MyComQueryCmd=MYSQL_COM_QUERY___NONE;
QueryPointer=NULL;
QueryLength=0;
return ret;
}
char * Query_Info::get_digest_text() {
return GloQPro->get_digest_text(&QueryParserArgs);
}
bool Query_Info::is_select_NOT_for_update() {
if (stmt_info) { // we are processing a prepared statement. We already have the information
return stmt_info->is_select_NOT_for_update;
}
if (QueryPointer==NULL) {
return false;
}
if (bool_is_select_NOT_for_update_computed) {
return bool_is_select_NOT_for_update;
}
bool_is_select_NOT_for_update_computed=true;
if (QueryLength<7) {
return false;
}
char *QP = (char *)QueryPointer;
size_t ql = QueryLength;
// we try to use the digest, if avaiable
if (QueryParserArgs.digest_text) {
QP = QueryParserArgs.digest_text;
ql = strlen(QP);
}
if (strncasecmp(QP,(char *)"SELECT ",7)) {
return false;
}
// if we arrive till here, it is a SELECT
if (ql>=17) {
char *p=QP;
p+=ql-11;
if (strncasecmp(p," FOR UPDATE",11)==0) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
p=QP;
p+=ql-10;
if (strncasecmp(p," FOR SHARE",10)==0) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
if (ql>=25) {
char *p=QP;
p+=ql-19;
if (strncasecmp(p," LOCK IN SHARE MODE",19)==0) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
p=QP;
p+=ql-7;
if (strncasecmp(p," NOWAIT",7)==0) {
// let simplify. If NOWAIT is used, we assume FOR UPDATE|SHARE is used
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
/*
if (strcasestr(QP," FOR UPDATE ")==NULL) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
if (strcasestr(QP," FOR SHARE ")==NULL) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
*/
}
p=QP;
p+=ql-12;
if (strncasecmp(p," SKIP LOCKED",12)==0) {
// let simplify. If SKIP LOCKED is used, we assume FOR UPDATE|SHARE is used
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
/*
if (strcasestr(QP," FOR UPDATE ")) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
if (strcasestr(QP," FOR SHARE ")) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
*/
}
p=QP;
char buf[129];
if (ql>=128) { // for long query, just check the last 128 bytes
p+=ql-128;
memcpy(buf,p,128);
buf[128]=0;
} else {
memcpy(buf,p,ql);
buf[ql]=0;
}
if (strcasestr(buf," FOR ")) {
if (strcasestr(buf," FOR UPDATE ")) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
if (strcasestr(buf," FOR SHARE ")) {
__sync_fetch_and_add(&MyHGM->status.select_for_update_or_equivalent, 1);
return false;
}
}
}
}
bool_is_select_NOT_for_update=true;
return true;
}
void * MySQL_Session::operator new(size_t size) {
return l_alloc(size);
}
void MySQL_Session::operator delete(void *ptr) {
l_free(sizeof(MySQL_Session),ptr);
}
void MySQL_Session::set_status(enum session_status e) {
if (e==session_status___NONE) {
if (mybe) {
if (mybe->server_myds) {
assert(mybe->server_myds->myconn==0);
if (mybe->server_myds->myconn) {
assert(mybe->server_myds->myconn->async_state_machine==ASYNC_IDLE);
}
}
}
}
status=e;
}
MySQL_Session::MySQL_Session() {
thread_session_id=0;
//handler_ret = 0;
pause_until=0;
qpo=new Query_Processor_Output();
start_time=0;
command_counters=new StatCounters(15,10);
healthy=1;
autocommit=true;
autocommit_handled=false;
sending_set_autocommit=false;
autocommit_on_hostgroup=-1;
killed=false;
session_type=PROXYSQL_SESSION_MYSQL;
//admin=false;
connections_handler=false;
max_connections_reached=false;
//stats=false;
client_authenticated=false;
default_schema=NULL;
user_attributes=NULL;
schema_locked=false;
session_fast_forward=false;
started_sending_data_to_client=false;
handler_function=NULL;
client_myds=NULL;
to_process=0;
mybe=NULL;
mirror=false;
mirrorPkt.ptr=NULL;
mirrorPkt.size=0;
set_status(session_status___NONE);
idle_since = 0;
transaction_started_at = 0;
CurrentQuery.sess=this;
CurrentQuery.mysql_stmt=NULL;
CurrentQuery.stmt_meta=NULL;
CurrentQuery.stmt_global_id=0;
CurrentQuery.stmt_client_id=0;
CurrentQuery.stmt_info=NULL;
current_hostgroup=-1;
default_hostgroup=-1;
locked_on_hostgroup=-1;
locked_on_hostgroup_and_all_variables_set=false;
next_query_flagIN=-1;
mirror_hostgroup=-1;
mirror_flagOUT=-1;
active_transactions=0;
with_gtid = false;
use_ssl = false;
change_user_auth_switch = false;
//gtid_trxid = 0;
gtid_hid = -1;
memset(gtid_buf,0,sizeof(gtid_buf));
match_regexes=NULL;
init(); // we moved this out to allow CHANGE_USER
last_insert_id=0; // #1093
last_HG_affected_rows = -1; // #1421 : advanced support for LAST_INSERT_ID()
proxysql_node_address = NULL;
use_ldap_auth = false;
}
void MySQL_Session::init() {
transaction_persistent_hostgroup=-1;
transaction_persistent=false;
mybes= new PtrArray(4);
sess_STMTs_meta=new MySQL_STMTs_meta();
SLDH=new StmtLongDataHandler();
}
void MySQL_Session::reset() {
autocommit=true;
autocommit_handled=false;
sending_set_autocommit=false;
autocommit_on_hostgroup=-1;
current_hostgroup=-1;
default_hostgroup=-1;
locked_on_hostgroup=-1;
locked_on_hostgroup_and_all_variables_set=false;
if (sess_STMTs_meta) {
delete sess_STMTs_meta;
sess_STMTs_meta=NULL;
}
if (SLDH) {
delete SLDH;
SLDH=NULL;
}
if (mybes) {
reset_all_backends();
delete mybes;
mybes=NULL;
}
mybe=NULL;
with_gtid = false;
//gtid_trxid = 0;
gtid_hid = -1;
memset(gtid_buf,0,sizeof(gtid_buf));
if (session_type == PROXYSQL_SESSION_SQLITE) {
SQLite3_Session *sqlite_sess = (SQLite3_Session *)thread->gen_args;
if (sqlite_sess && sqlite_sess->sessdb) {
sqlite3 *db = sqlite_sess->sessdb->get_db();
if ((*proxy_sqlite3_get_autocommit)(db)==0) {
sqlite_sess->sessdb->execute((char *)"COMMIT");
}
}
}
if (client_myds) {
if (client_myds->myconn) {
client_myds->myconn->reset();
}
}
}
MySQL_Session::~MySQL_Session() {
reset(); // we moved this out to allow CHANGE_USER
if (locked_on_hostgroup >= 0) {
thread->status_variables.stvar[st_var_hostgroup_locked]--;
}
if (client_myds) {
if (client_authenticated) {
switch (session_type) {
#ifdef PROXYSQLCLICKHOUSE
case PROXYSQL_SESSION_CLICKHOUSE:
GloClickHouseAuth->decrease_frontend_user_connections(client_myds->myconn->userinfo->username);
break;
#endif /* PROXYSQLCLICKHOUSE */
default:
if (use_ldap_auth == false) {
GloMyAuth->decrease_frontend_user_connections(client_myds->myconn->userinfo->username);
} else {
GloMyLdapAuth->decrease_frontend_user_connections(client_myds->myconn->userinfo->fe_username);
}
break;
}
}
delete client_myds;
}
if (default_schema) {
free(default_schema);
}
if (user_attributes) {
free(user_attributes);
user_attributes = NULL;
}
proxy_debug(PROXY_DEBUG_NET,1,"Thread=%p, Session=%p -- Shutdown Session %p\n" , this->thread, this, this);
delete command_counters;
if (session_type==PROXYSQL_SESSION_MYSQL && connections_handler==false && mirror==false) {
__sync_fetch_and_sub(&MyHGM->status.client_connections,1);
}
assert(qpo);
delete qpo;
match_regexes=NULL;
if (mirror) {
__sync_sub_and_fetch(&GloMTH->status_variables.mirror_sessions_current,1);
GloMTH->status_variables.p_gauge_array[p_th_gauge::mirror_concurrency]->Decrement();
}
if (proxysql_node_address) {
delete proxysql_node_address;
proxysql_node_address = NULL;
}
}
// scan the pointer array of mysql backends (mybes) looking for a backend for the specified hostgroup_id
MySQL_Backend * MySQL_Session::find_backend(int hostgroup_id) {
MySQL_Backend *_mybe;
unsigned int i;
for (i=0; i < mybes->len; i++) {
_mybe=(MySQL_Backend *)mybes->index(i);
if (_mybe->hostgroup_id==hostgroup_id) {
return _mybe;
}
}
return NULL; // NULL = backend not found
};
void MySQL_Session::update_expired_conns(const vector<function<bool(MySQL_Connection*)>>& checks) {
for (uint32_t i = 0; i < mybes->len; i++) {
MySQL_Backend* mybe = static_cast<MySQL_Backend*>(mybes->index(i));
MySQL_Data_Stream* myds = mybe != nullptr ? mybe->server_myds : nullptr;
MySQL_Connection* myconn = myds != nullptr ? myds->myconn : nullptr;
if (myconn != nullptr) {
const bool is_active_transaction = myconn->IsActiveTransaction();
const bool multiplex_disabled = myconn->MultiplexDisabled(false);
const bool is_idle = myconn->async_state_machine == ASYNC_IDLE;
// Make sure the connection is reusable before performing any check
if (myconn->reusable==true && is_active_transaction==false && multiplex_disabled==false && is_idle) {
for (const function<bool(MySQL_Connection*)>& check : checks) {
if (check(myconn)) {
this->hgs_expired_conns.push_back(mybe->hostgroup_id);
break;
}
}
}
}
}
}
MySQL_Backend * MySQL_Session::create_backend(int hostgroup_id, MySQL_Data_Stream *_myds) {
MySQL_Backend *_mybe=new MySQL_Backend();
proxy_debug(PROXY_DEBUG_NET,4,"HID=%d, _myds=%p, _mybe=%p\n" , hostgroup_id, _myds, _mybe);
_mybe->hostgroup_id=hostgroup_id;
if (_myds) {
_mybe->server_myds=_myds;
} else {
_mybe->server_myds = new MySQL_Data_Stream();
_mybe->server_myds->DSS=STATE_NOT_INITIALIZED;
_mybe->server_myds->init(MYDS_BACKEND_NOT_CONNECTED, this, 0);
}
mybes->add(_mybe);
return _mybe;
};
MySQL_Backend * MySQL_Session::find_or_create_backend(int hostgroup_id, MySQL_Data_Stream *_myds) {
MySQL_Backend *_mybe=find_backend(hostgroup_id);
proxy_debug(PROXY_DEBUG_NET,4,"HID=%d, _myds=%p, _mybe=%p\n" , hostgroup_id, _myds, _mybe);
return ( _mybe ? _mybe : create_backend(hostgroup_id, _myds) );
};
void MySQL_Session::reset_all_backends() {
MySQL_Backend *mybe;
while(mybes->len) {
mybe=(MySQL_Backend *)mybes->remove_index_fast(0);
mybe->reset();
delete mybe;
}
};
void MySQL_Session::writeout() {
int tps = 10; // throttling per second , by default every 100ms
int total_written = 0;
unsigned long long last_sent_=0;
bool disable_throttle = mysql_thread___throttle_max_bytes_per_second_to_client == 0;
int mwpl = mysql_thread___throttle_max_bytes_per_second_to_client; // max writes per call
mwpl = mwpl/tps;
if (session_type!=PROXYSQL_SESSION_MYSQL) {
disable_throttle = true;
}
if (client_myds) client_myds->array2buffer_full();
if (mybe && mybe->server_myds && mybe->server_myds->myds_type==MYDS_BACKEND) {
if (session_type==PROXYSQL_SESSION_MYSQL) {
if (mybe->server_myds->net_failure==false) {
if (mybe->server_myds->poll_fds_idx>-1) { // NOTE: attempt to force writes
mybe->server_myds->array2buffer_full();
}
}
} else {
mybe->server_myds->array2buffer_full();
}
}
if (client_myds && thread->curtime >= client_myds->pause_until) {
if (mirror==false) {
bool runloop=false;
if (client_myds->mypolls) {
last_sent_ = client_myds->mypolls->last_sent[client_myds->poll_fds_idx];
}
int retbytes=client_myds->write_to_net_poll();
total_written+=retbytes;
if (retbytes==QUEUE_T_DEFAULT_SIZE) { // optimization to solve memory bloat
runloop=true;
}
while (runloop && (disable_throttle || total_written < mwpl)) {
runloop=false; // the default
client_myds->array2buffer_full();
struct pollfd fds;
fds.fd=client_myds->fd;
fds.events=POLLOUT;
fds.revents=0;
int retpoll=poll(&fds, 1, 0);
if (retpoll>0) {
if (fds.revents==POLLOUT) {
retbytes=client_myds->write_to_net_poll();
total_written+=retbytes;
if (retbytes==QUEUE_T_DEFAULT_SIZE) { // optimization to solve memory bloat
runloop=true;
}
}
}
}
}
}
// flow control
if (!disable_throttle && total_written > 0) {
if (total_written > mwpl) {
unsigned long long add_ = 1000000/tps + 1000000/tps*((unsigned long long)total_written - (unsigned long long)mwpl)/mwpl;
pause_until = thread->curtime + add_;
client_myds->remove_pollout();
client_myds->pause_until = thread->curtime + add_;
} else {
if (total_written >= QUEUE_T_DEFAULT_SIZE) {
unsigned long long time_diff = thread->curtime - last_sent_;
if (time_diff == 0) { // sending data really too fast!
unsigned long long add_ = 1000000/tps + 1000000/tps*((unsigned long long)total_written - (unsigned long long)mwpl)/mwpl;
pause_until = thread->curtime + add_;
client_myds->remove_pollout();
client_myds->pause_until = thread->curtime + add_;
} else {
float current_Bps = (float)total_written*1000*1000/time_diff;
if (current_Bps > mysql_thread___throttle_max_bytes_per_second_to_client) {
unsigned long long add_ = 1000000/tps;
pause_until = thread->curtime + add_;
assert(pause_until > thread->curtime);
client_myds->remove_pollout();
client_myds->pause_until = thread->curtime + add_;
}
}
}
}
}
if (mybe) {
if (mybe->server_myds) mybe->server_myds->write_to_net_poll();
}
proxy_debug(PROXY_DEBUG_NET,1,"Thread=%p, Session=%p -- Writeout Session %p\n" , this->thread, this, this);
}
bool MySQL_Session::handler_CommitRollback(PtrSize_t *pkt) {
if (pkt->size <= 5) { return false; }
char c=((char *)pkt->ptr)[5];
bool ret=false;
if (c=='c' || c=='C') {
if (pkt->size==strlen("commit")+5) {
if (strncasecmp((char *)"commit",(char *)pkt->ptr+5,6)==0) {
__sync_fetch_and_add(&MyHGM->status.commit_cnt, 1);
ret=true;
}
}
} else {
if (c=='r' || c=='R') {
if (pkt->size==strlen("rollback")+5) {
if ( strncasecmp((char *)"rollback",(char *)pkt->ptr+5,8)==0 ) {
__sync_fetch_and_add(&MyHGM->status.rollback_cnt, 1);
ret=true;
}
}
}
}
if (ret==false) {
return false; // quick exit
}
// in this part of the code (as at release 2.4.3) where we call
// NumActiveTransactions() with the check_savepoint flag .
// This to try to handle MySQL bug https://bugs.mysql.com/bug.php?id=107875
unsigned int nTrx=NumActiveTransactions(true);
if (nTrx) {
// there is an active transaction, we must forward the request
return false;
} else {
// there is no active transaction, we will just reply OK
client_myds->DSS=STATE_QUERY_SENT_NET;
uint16_t setStatus = 0;
if (autocommit) setStatus |= SERVER_STATUS_AUTOCOMMIT;
client_myds->myprot.generate_pkt_OK(true,NULL,NULL,1,0,0,setStatus,0,NULL);
client_myds->DSS=STATE_SLEEP;
status=WAITING_CLIENT_DATA;
if (mirror==false) {
RequestEnd(NULL);
}
l_free(pkt->size,pkt->ptr);
if (c=='c' || c=='C') {
__sync_fetch_and_add(&MyHGM->status.commit_cnt_filtered, 1);
} else {
__sync_fetch_and_add(&MyHGM->status.rollback_cnt_filtered, 1);
}
return true;
}
return false;
}
bool MySQL_Session::handler_SetAutocommit(PtrSize_t *pkt) {
autocommit_handled=false;
sending_set_autocommit=false;
size_t sal=strlen("set autocommit");
char * _ptr = (char *)pkt->ptr;
#ifdef DEBUG
string nqn = string((char *)CurrentQuery.QueryPointer,CurrentQuery.QueryLength);
proxy_debug(PROXY_DEBUG_MYSQL_QUERY_PROCESSOR, 5, "Parsing SET command = %s\n", nqn.c_str());
#endif
if ( pkt->size >= 7+sal) {
if (strncasecmp((char *)"SET @@session.autocommit",(char *)pkt->ptr+5,strlen((char *)"SET @@session.autocommit"))==0) {
memmove(_ptr+9, _ptr+19, pkt->size - 19);
memset(_ptr+pkt->size-10,' ',10);
}
if (strncasecmp((char *)"set autocommit",(char *)pkt->ptr+5,sal)==0) {
void *p = NULL;
// make a copy
PtrSize_t _new_pkt;
_new_pkt.size = pkt->size;
_new_pkt.ptr = malloc(_new_pkt.size);
memcpy(_new_pkt.ptr, pkt->ptr, _new_pkt.size);
_ptr = (char *)_new_pkt.ptr;
for (int i=5+sal; i < (int)_new_pkt.size; i++) {
*((char *)_new_pkt.ptr+i) = tolower(*((char *)_new_pkt.ptr+i));
}
p = memmem(_ptr+5+sal, pkt->size-5-sal, (void *)"false", 5);
if (p) {
memcpy(p,(void *)"0 ",5);
}
p = memmem(_ptr+5+sal, pkt->size-5-sal, (void *)"true", 4);
if (p) {
memcpy(p,(void *)"1 ",4);
}
p = memmem(_ptr+5+sal, pkt->size-5-sal, (void *)"off", 3);
if (p) {
memcpy(p,(void *)"0 ",3);
}
p = memmem(_ptr+5+sal, pkt->size-5-sal, (void *)"on", 2);
if (p) {
memcpy(p,(void *)"1 ",2);
}
unsigned int i;
bool eq=false;
int fd=-1; // first digit
for (i=5+sal;i<_new_pkt.size;i++) {
char c=((char *)_new_pkt.ptr)[i];
if (c!='0' && c!='1' && c!=' ' && c!='=' && c!='/') {
free(_new_pkt.ptr);
return false; // found a not valid char
}
if (eq==false) {
if (c!=' ' && c!='=') {
free(_new_pkt.ptr);
return false; // found a not valid char
}
if (c=='=') eq=true;
} else {
if (c!='0' && c!='1' && c!=' ' && c!='/') {
free(_new_pkt.ptr);
return false; // found a not valid char
}
if (fd==-1) {
if (c=='0' || c=='1') { // found first digit
if (c=='0')
fd=0;
else
fd=1;
}