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bug fixes in server-id, moved replication functionality to

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sql_repl.* will push this one, since the replication code now works
This commit is contained in:
sasha@mysql.sashanet.com 2000-09-29 17:20:26 -06:00
parent 079d859072
commit 62a6a0fdf1
10 changed files with 41 additions and 527 deletions
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8
repl-tests/test-dump/run.test
View File

@ -1,4 +1,11 @@
source ../include/master-slave.inc; source ../include/master-slave.inc;
connection slave;
!slave stop;
flush slave;
connection master;
flush master;
connection slave;
slave start;
connection master; connection master;
use test; use test;
drop table if exists words; drop table if exists words;
@ -7,6 +14,7 @@ load data infile '/usr/dict/words' into table words;
drop table if exists words1; drop table if exists words1;
create table words1 (word char(20) not null); create table words1 (word char(20) not null);
load data infile '/usr/dict/words' into table words1; load data infile '/usr/dict/words' into table words1;
sleep 5;
connection slave; connection slave;
use test; use test;
drop table if exists words; drop table if exists words;

4
sql/Makefile.am
View File

@ -48,7 +48,7 @@ noinst_HEADERS = item.h item_func.h item_sum.h item_cmpfunc.h \
opt_range.h \ opt_range.h \
sql_select.h structs.h table.h sql_udf.h hash_filo.h\ sql_select.h structs.h table.h sql_udf.h hash_filo.h\
lex.h lex_symbol.h sql_acl.h sql_crypt.h md5.h \ lex.h lex_symbol.h sql_acl.h sql_crypt.h md5.h \
log_event.h mini_client.h log_event.h mini_client.h sql_repl.h
mysqld_SOURCES = sql_lex.cc \ mysqld_SOURCES = sql_lex.cc \
item.cc item_sum.cc item_buff.cc item_func.cc \ item.cc item_sum.cc item_buff.cc item_func.cc \
item_cmpfunc.cc item_strfunc.cc item_timefunc.cc \ item_cmpfunc.cc item_strfunc.cc item_timefunc.cc \
@ -69,7 +69,7 @@ mysqld_SOURCES = sql_lex.cc \
sql_db.cc sql_table.cc sql_rename.cc sql_crypt.cc \ sql_db.cc sql_table.cc sql_rename.cc sql_crypt.cc \
sql_load.cc mf_iocache.cc field_conv.cc sql_show.cc \ sql_load.cc mf_iocache.cc field_conv.cc sql_show.cc \
sql_udf.cc sql_analyse.cc sql_analyse.h sql_cache.cc \ sql_udf.cc sql_analyse.cc sql_analyse.h sql_cache.cc \
slave.cc \ slave.cc sql_repl.cc \
md5.c log_event.cc mini_client.cc mini_client_errors.c md5.c log_event.cc mini_client.cc mini_client_errors.c
gen_lex_hash_SOURCES = gen_lex_hash.cc gen_lex_hash_SOURCES = gen_lex_hash.cc
gen_lex_hash_LDADD = $(LDADD) $(CXXLDFLAGS) gen_lex_hash_LDADD = $(LDADD) $(CXXLDFLAGS)

10
sql/log_event.cc
View File

@ -22,16 +22,6 @@
#include "mysql_priv.h" #include "mysql_priv.h"
#endif /* MYSQL_CLIENT */ #endif /* MYSQL_CLIENT */
#define LOG_EVENT_HEADER_LEN 13
#define QUERY_HEADER_LEN (sizeof(uint32) + sizeof(uint32) + sizeof(uchar))
#define LOAD_HEADER_LEN (sizeof(uint32) + sizeof(uint32) + \
+ sizeof(uint32) + 2 + sizeof(uint32))
#define EVENT_LEN_OFFSET 9
#define EVENT_TYPE_OFFSET 4
#define MAX_EVENT_LEN 4*1024*1024
#define QUERY_EVENT_OVERHEAD LOG_EVENT_HEADER_LEN+QUERY_HEADER_LEN
#define ROTATE_EVENT_OVERHEAD LOG_EVENT_HEADER_LEN
#define LOAD_EVENT_OVERHEAD (LOG_EVENT_HEADER_LEN+LOAD_HEADER_LEN+sizeof(sql_ex_info))
static void pretty_print_char(FILE* file, int c) static void pretty_print_char(FILE* file, int c)
{ {

14
sql/log_event.h
View File

@ -30,6 +30,18 @@
#define LOG_EVENT_OFFSET 4 #define LOG_EVENT_OFFSET 4
#define BINLOG_VERSION 1 #define BINLOG_VERSION 1
#define LOG_EVENT_HEADER_LEN 13
#define QUERY_HEADER_LEN (sizeof(uint32) + sizeof(uint32) + sizeof(uchar))
#define LOAD_HEADER_LEN (sizeof(uint32) + sizeof(uint32) + \
+ sizeof(uint32) + 2 + sizeof(uint32))
#define EVENT_LEN_OFFSET 9
#define EVENT_TYPE_OFFSET 4
#define MAX_EVENT_LEN 4*1024*1024
#define QUERY_EVENT_OVERHEAD LOG_EVENT_HEADER_LEN+QUERY_HEADER_LEN
#define ROTATE_EVENT_OVERHEAD LOG_EVENT_HEADER_LEN
#define LOAD_EVENT_OVERHEAD (LOG_EVENT_HEADER_LEN+LOAD_HEADER_LEN+sizeof(sql_ex_info))
enum Log_event_type { START_EVENT = 1, QUERY_EVENT =2, enum Log_event_type { START_EVENT = 1, QUERY_EVENT =2,
STOP_EVENT=3, ROTATE_EVENT = 4, INTVAR_EVENT=5, STOP_EVENT=3, ROTATE_EVENT = 4, INTVAR_EVENT=5,
LOAD_EVENT=6}; LOAD_EVENT=6};
@ -101,7 +113,7 @@ public:
#if !defined(MYSQL_CLIENT) #if !defined(MYSQL_CLIENT)
THD* thd; THD* thd;
Query_log_event(THD* thd_arg, const char* query_arg): Query_log_event(THD* thd_arg, const char* query_arg):
Log_event(thd_arg->start_time,0,0,thd->server_id), data_buf(0), Log_event(thd_arg->start_time,0,0,thd_arg->server_id), data_buf(0),
query(query_arg), db(thd_arg->db), q_len(thd_arg->query_length), query(query_arg), db(thd_arg->db), q_len(thd_arg->query_length),
thread_id(thd_arg->thread_id), thd(thd_arg) thread_id(thd_arg->thread_id), thd(thd_arg)
{ {

2
sql/mysql_priv.h
View File

@ -464,7 +464,7 @@ extern pthread_mutex_t LOCK_mysql_create_db,LOCK_Acl,LOCK_open,
LOCK_thread_count,LOCK_mapped_file,LOCK_user_locks, LOCK_status, LOCK_thread_count,LOCK_mapped_file,LOCK_user_locks, LOCK_status,
LOCK_grant, LOCK_error_log, LOCK_delayed_insert, LOCK_grant, LOCK_error_log, LOCK_delayed_insert,
LOCK_delayed_status, LOCK_delayed_create, LOCK_crypt, LOCK_timezone, LOCK_delayed_status, LOCK_delayed_create, LOCK_crypt, LOCK_timezone,
LOCK_binlog_update, LOCK_slave; LOCK_binlog_update, LOCK_slave, LOCK_server_id;
extern pthread_cond_t COND_refresh,COND_thread_count, COND_binlog_update, extern pthread_cond_t COND_refresh,COND_thread_count, COND_binlog_update,
COND_slave_stopped; COND_slave_stopped;
extern pthread_attr_t connection_attrib; extern pthread_attr_t connection_attrib;

5
sql/mysqlbinlog.cc
View File

@ -270,8 +270,9 @@ static void dump_remote_log_entries(const char* logname)
int4store(buf, position); int4store(buf, position);
int2store(buf + 4, binlog_flags); int2store(buf + 4, binlog_flags);
len = (uint) strlen(logname); len = (uint) strlen(logname);
memcpy(buf + 6, logname,len); int4store(buf + 6, 0);
if(mc_simple_command(mysql, COM_BINLOG_DUMP, buf, len + 6, 1)) memcpy(buf + 10, logname,len);
if(mc_simple_command(mysql, COM_BINLOG_DUMP, buf, len + 10, 1))
die("Error sending the log dump command"); die("Error sending the log dump command");
for(;;) for(;;)

3
sql/mysqld.cc
View File

@ -248,7 +248,7 @@ pthread_mutex_t LOCK_mysql_create_db, LOCK_Acl, LOCK_open, LOCK_thread_count,
LOCK_error_log, LOCK_error_log,
LOCK_delayed_insert, LOCK_delayed_status, LOCK_delayed_create, LOCK_delayed_insert, LOCK_delayed_status, LOCK_delayed_create,
LOCK_flush, LOCK_crypt, LOCK_bytes_sent, LOCK_bytes_received, LOCK_flush, LOCK_crypt, LOCK_bytes_sent, LOCK_bytes_received,
LOCK_binlog_update, LOCK_slave; LOCK_binlog_update, LOCK_slave, LOCK_server_id;
pthread_cond_t COND_refresh,COND_thread_count,COND_flush, COND_binlog_update, pthread_cond_t COND_refresh,COND_thread_count,COND_flush, COND_binlog_update,
COND_slave_stopped; COND_slave_stopped;
@ -1395,6 +1395,7 @@ int main(int argc, char **argv)
(void) pthread_mutex_init(&LOCK_timezone,NULL); (void) pthread_mutex_init(&LOCK_timezone,NULL);
(void) pthread_mutex_init(&LOCK_binlog_update, NULL); (void) pthread_mutex_init(&LOCK_binlog_update, NULL);
(void) pthread_mutex_init(&LOCK_slave, NULL); (void) pthread_mutex_init(&LOCK_slave, NULL);
(void) pthread_mutex_init(&LOCK_server_id, NULL);
(void) pthread_cond_init(&COND_binlog_update, NULL); (void) pthread_cond_init(&COND_binlog_update, NULL);
(void) pthread_cond_init(&COND_slave_stopped, NULL); (void) pthread_cond_init(&COND_slave_stopped, NULL);

7
sql/slave.cc
View File

@ -463,15 +463,16 @@ static int safe_sleep(THD* thd, int sec)
static int request_dump(MYSQL* mysql, MASTER_INFO* mi) static int request_dump(MYSQL* mysql, MASTER_INFO* mi)
{ {
char buf[FN_REFLEN + 6]; char buf[FN_REFLEN + 10];
int len; int len;
int binlog_flags = 0; // for now int binlog_flags = 0; // for now
char* logname = mi->log_file_name; char* logname = mi->log_file_name;
int4store(buf, mi->pos); int4store(buf, mi->pos);
int2store(buf + 4, binlog_flags); int2store(buf + 4, binlog_flags);
int4store(buf + 6, server_id);
len = (uint) strlen(logname); len = (uint) strlen(logname);
memcpy(buf + 6, logname,len); memcpy(buf + 10, logname,len);
if(mc_simple_command(mysql, COM_BINLOG_DUMP, buf, len + 6, 1)) if(mc_simple_command(mysql, COM_BINLOG_DUMP, buf, len + 10, 1))
// something went wrong, so we will just reconnect and retry later // something went wrong, so we will just reconnect and retry later
// in the future, we should do a better error analysis, but for // in the future, we should do a better error analysis, but for
// now we just fill up the error log :-) // now we just fill up the error log :-)

287
sql/sql_base.cc
View File

@ -42,71 +42,6 @@ static void mysql_rm_tmp_tables(void);
static key_map get_key_map_from_key_list(THD *thd, TABLE *table, static key_map get_key_map_from_key_list(THD *thd, TABLE *table,
List<String> *index_list); List<String> *index_list);
static int send_file(THD *thd)
{
NET* net = &thd->net;
int fd = -1,bytes, error = 1;
char fname[FN_REFLEN+1];
char buf[IO_SIZE*15];
const char *errmsg = 0;
int old_timeout;
DBUG_ENTER("send_file");
// the client might be slow loading the data, give him wait_timeout to do
// the job
old_timeout = thd->net.timeout;
thd->net.timeout = thd->inactive_timeout;
// we need net_flush here because the client will not know it needs to send
// us the file name until it has processed the load event entry
if (net_flush(net) || my_net_read(net) == packet_error)
{
errmsg = "Failed reading file name";
goto err;
}
fn_format(fname, (char*)net->read_pos + 1, "", "", 4);
// this is needed to make replicate-ignore-db
if (!strcmp(fname,"/dev/null"))
goto end;
// TODO: work on the well-known system that does not have a /dev/null :-)
if ((fd = my_open(fname, O_RDONLY, MYF(MY_WME))) < 0)
{
errmsg = "Failed on my_open()";
goto err;
}
while ((bytes = (int) my_read(fd, (byte*) buf, sizeof(buf),
MYF(MY_WME))) > 0)
{
if (my_net_write(net, buf, bytes))
{
errmsg = "Failed on my_net_write()";
goto err;
}
}
end:
if (my_net_write(net, "", 0) || net_flush(net) ||
(my_net_read(net) == packet_error))
{
errmsg = "failed negotiating file transfer close";
goto err;
}
error = 0;
err:
thd->net.timeout = old_timeout;
if(fd >= 0)
(void) my_close(fd, MYF(MY_WME));
if (errmsg)
{
sql_print_error("failed in send_file() : %s", errmsg);
DBUG_PRINT("error", (errmsg));
}
DBUG_RETURN(error);
}
static byte *cache_key(const byte *record,uint *length, static byte *cache_key(const byte *record,uint *length,
my_bool not_used __attribute__((unused))) my_bool not_used __attribute__((unused)))
@ -177,228 +112,6 @@ static void check_unused(void)
#define check_unused() #define check_unused()
#endif #endif
void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags)
{
LOG_INFO linfo;
char *log_file_name = linfo.log_file_name;
char search_file_name[FN_REFLEN];
FILE* log = NULL;
String* packet = &thd->packet;
int error;
const char *errmsg = "Unknown error";
NET* net = &thd->net;
DBUG_ENTER("mysql_binlog_send");
if(!mysql_bin_log.is_open())
{
errmsg = "Binary log is not open";
goto err;
}
if(log_ident[0])
mysql_bin_log.make_log_name(search_file_name, log_ident);
else
search_file_name[0] = 0;
if(mysql_bin_log.find_first_log(&linfo, search_file_name))
{
errmsg = "Could not find first log";
goto err;
}
log = my_fopen(log_file_name, O_RDONLY, MYF(MY_WME));
if(!log)
{
errmsg = "Could not open log file";
goto err;
}
if(my_fseek(log, pos, MY_SEEK_SET, MYF(MY_WME)) == MY_FILEPOS_ERROR )
{
errmsg = "Error on fseek()";
goto err;
}
packet->length(0);
packet->append("\0", 1); // we need to start a packet with something other than 255
// to distiquish it from error
while(!net->error && net->vio != 0 && !thd->killed)
{
while(!(error = Log_event::read_log_event(log, packet)))
{
if(my_net_write(net, (char*)packet->ptr(), packet->length()) )
{
errmsg = "Failed on my_net_write()";
goto err;
}
DBUG_PRINT("info", ("log event code %d",(*packet)[LOG_EVENT_OFFSET+1] ));
if((*packet)[LOG_EVENT_OFFSET+1] == LOAD_EVENT)
{
if(send_file(thd))
{
errmsg = "failed in send_file()";
goto err;
}
}
packet->length(0);
packet->append("\0",1);
}
if(error != LOG_READ_EOF)
{
errmsg = "error reading log event";
goto err;
}
if(!(flags & BINLOG_DUMP_NON_BLOCK) && mysql_bin_log.is_active(log_file_name))
// block until there is more data in the log
// unless non-blocking mode requested
{
if(net_flush(net))
{
errmsg = "failed on net_flush()";
goto err;
}
// we may have missed the update broadcast from the log
// that has just happened, let's try to catch it if it did
// if we did not miss anything, we just wait for other threads
// to signal us
{
pthread_mutex_t *log_lock = mysql_bin_log.get_log_lock();
clearerr(log);
// tell the kill thread how to wake us up
pthread_mutex_lock(&thd->mysys_var->mutex);
thd->mysys_var->current_mutex = log_lock;
thd->mysys_var->current_cond = &COND_binlog_update;
const char* proc_info = thd->proc_info;
thd->proc_info = "Waiting for update";
pthread_mutex_unlock(&thd->mysys_var->mutex);
bool read_packet = 0, fatal_error = 0;
pthread_mutex_lock(log_lock); // no one will update the log while we are reading
// now, but we'll be quick and just read one record
switch(Log_event::read_log_event(log, packet))
{
case 0:
read_packet = 1; // we read successfully, so we'll need to send it to the
// slave
break;
case LOG_READ_EOF:
pthread_cond_wait(&COND_binlog_update, log_lock);
break;
default:
fatal_error = 1;
break;
}
pthread_mutex_unlock(log_lock);
pthread_mutex_lock(&thd->mysys_var->mutex);
thd->mysys_var->current_mutex= 0;
thd->mysys_var->current_cond= 0;
thd->proc_info= proc_info;
pthread_mutex_unlock(&thd->mysys_var->mutex);
if(read_packet)
{
if(my_net_write(net, (char*)packet->ptr(), packet->length()) )
{
errmsg = "Failed on my_net_write()";
goto err;
}
if((*packet)[LOG_EVENT_OFFSET+1] == LOAD_EVENT)
{
if(send_file(thd))
{
errmsg = "failed in send_file()";
goto err;
}
}
packet->length(0);
packet->append("\0",1);
// no need to net_flush because we will get to flush later when
// we hit EOF pretty quick
}
if(fatal_error)
{
errmsg = "error reading log entry";
goto err;
}
clearerr(log);
}
}
else
{
bool loop_breaker = 0; // need this to break out of the for loop from switch
switch(mysql_bin_log.find_next_log(&linfo))
{
case LOG_INFO_EOF:
loop_breaker = (flags & BINLOG_DUMP_NON_BLOCK);
break;
case 0:
break;
default:
errmsg = "could not find next log";
goto err;
}
if(loop_breaker)
break;
(void) my_fclose(log, MYF(MY_WME));
log = my_fopen(log_file_name, O_RDONLY, MYF(MY_WME));
if(!log)
goto err;
// fake Rotate_log event just in case it did not make it to the log
// otherwise the slave make get confused about the offset
{
char header[9];
memset(header, 0, 4); // when does not matter
header[4] = ROTATE_EVENT;
char* p = strrchr(log_file_name, FN_LIBCHAR); // find the last slash
if(p)
p++;
else
p = log_file_name;
uint ident_len = (uint) strlen(p);
ulong event_len = ident_len + sizeof(header);
int4store(header + 5, event_len);
packet->append(header, sizeof(header));
packet->append(p,ident_len);
if(my_net_write(net, (char*)packet->ptr(), packet->length()))
{
errmsg = "failed on my_net_write()";
goto err;
}
packet->length(0);
packet->append("\0",1);
}
}
}
(void)my_fclose(log, MYF(MY_WME));
send_eof(&thd->net);
DBUG_VOID_RETURN;
err:
if(log)
(void) my_fclose(log, MYF(MY_WME));
send_error(&thd->net, 0, errmsg);
DBUG_VOID_RETURN;
}
/****************************************************************************** /******************************************************************************

228
sql/sql_parse.cc
View File

@ -17,6 +17,7 @@
#include "mysql_priv.h" #include "mysql_priv.h"
#include "sql_acl.h" #include "sql_acl.h"
#include "sql_repl.h"
#include <m_ctype.h> #include <m_ctype.h>
#include <thr_alarm.h> #include <thr_alarm.h>
#include <myisam.h> #include <myisam.h>
@ -24,13 +25,6 @@
#define SCRAMBLE_LENGTH 8 #define SCRAMBLE_LENGTH 8
extern pthread_handler_decl(handle_slave,arg);
extern bool slave_running;
extern char* master_host;
extern pthread_t slave_real_id;
extern MASTER_INFO glob_mi;
extern my_string opt_bin_logname, master_info_file;
extern I_List<i_string> binlog_do_db, binlog_ignore_db;
extern int yyparse(void); extern int yyparse(void);
extern "C" pthread_mutex_t THR_LOCK_keycache; extern "C" pthread_mutex_t THR_LOCK_keycache;
@ -47,15 +41,8 @@ static void mysql_init_query(THD *thd);
static void remove_escape(char *name); static void remove_escape(char *name);
static void kill_one_thread(THD *thd, ulong thread); static void kill_one_thread(THD *thd, ulong thread);
static void refresh_status(void); static void refresh_status(void);
static int start_slave(THD* thd = 0, bool net_report = 1);
static int stop_slave(THD* thd = 0, bool net_report = 1);
static int change_master(THD* thd);
static void reset_slave();
static void reset_master();
extern int init_master_info(MASTER_INFO* mi); const char *any_db="*any*"; // Special symbol for check_access
static const char *any_db="*any*"; // Special symbol for check_access
const char *command_name[]={ const char *command_name[]={
"Sleep", "Quit", "Init DB", "Query", "Field List", "Create DB", "Sleep", "Quit", "Init DB", "Query", "Field List", "Create DB",
@ -717,9 +704,14 @@ bool do_command(THD *thd)
ulong pos; ulong pos;
ushort flags; ushort flags;
uint32 slave_server_id;
pos = uint4korr(packet + 1); pos = uint4korr(packet + 1);
flags = uint2korr(packet + 5); flags = uint2korr(packet + 5);
mysql_binlog_send(thd, thd->strdup(packet + 7), pos, flags); pthread_mutex_lock(&LOCK_server_id);
kill_zombie_dump_threads(slave_server_id = uint4korr(packet+7));
thd->server_id = slave_server_id;
pthread_mutex_unlock(&LOCK_server_id);
mysql_binlog_send(thd, strdup(packet + 11), pos, flags);
break; break;
} }
case COM_REFRESH: case COM_REFRESH:
@ -2516,207 +2508,3 @@ static void refresh_status(void)
pthread_mutex_unlock(&THR_LOCK_keycache); pthread_mutex_unlock(&THR_LOCK_keycache);
} }
static int start_slave(THD* thd , bool net_report)
{
if(!thd) thd = current_thd;
NET* net = &thd->net;
const char* err = 0;
if (check_access(thd, PROCESS_ACL, any_db))
return 1;
pthread_mutex_lock(&LOCK_slave);
if(!slave_running)
if(glob_mi.inited && glob_mi.host)
{
pthread_t hThread;
if(pthread_create(&hThread, &connection_attrib, handle_slave, 0))
{
err = "cannot create slave thread";
}
}
else
err = "Master host not set or master info not initialized";
else
err = "Slave already running";
pthread_mutex_unlock(&LOCK_slave);
if(err)
{
if(net_report) send_error(net, 0, err);
return 1;
}
else if(net_report)
send_ok(net);
return 0;
}
static int stop_slave(THD* thd, bool net_report )
{
if(!thd) thd = current_thd;
NET* net = &thd->net;
const char* err = 0;
if (check_access(thd, PROCESS_ACL, any_db))
return 1;
pthread_mutex_lock(&LOCK_slave);
if (slave_running)
{
abort_slave = 1;
thr_alarm_kill(slave_real_id);
// do not abort the slave in the middle of a query, so we do not set
// thd->killed for the slave thread
thd->proc_info = "waiting for slave to die";
pthread_cond_wait(&COND_slave_stopped, &LOCK_slave);
}
else
err = "Slave is not running";
pthread_mutex_unlock(&LOCK_slave);
thd->proc_info = 0;
if(err)
{
if(net_report) send_error(net, 0, err);
return 1;
}
else if(net_report)
send_ok(net);
return 0;
}
static void reset_slave()
{
MY_STAT stat_area;
char fname[FN_REFLEN];
bool slave_was_running = slave_running;
if(slave_running)
stop_slave(0,0);
fn_format(fname, master_info_file, mysql_data_home, "", 4+16+32);
if(my_stat(fname, &stat_area, MYF(0)))
if(my_delete(fname, MYF(MY_WME)))
return;
if(slave_was_running)
start_slave(0,0);
}
static int change_master(THD* thd)
{
bool slave_was_running;
// kill slave thread
pthread_mutex_lock(&LOCK_slave);
if((slave_was_running = slave_running))
{
abort_slave = 1;
thr_alarm_kill(slave_real_id);
thd->proc_info = "waiting for slave to die";
pthread_cond_wait(&COND_slave_stopped, &LOCK_slave); // wait until done
}
pthread_mutex_unlock(&LOCK_slave);
thd->proc_info = "changing master";
LEX_MASTER_INFO* lex_mi = &thd->lex.mi;
if(!glob_mi.inited)
init_master_info(&glob_mi);
pthread_mutex_lock(&glob_mi.lock);
if((lex_mi->host || lex_mi->port) && !lex_mi->log_file_name && !lex_mi->pos)
{
// if we change host or port, we must reset the postion
glob_mi.log_file_name[0] = 0;
glob_mi.pos = 0;
}
if(lex_mi->log_file_name)
strmake(glob_mi.log_file_name, lex_mi->log_file_name,
sizeof(glob_mi.log_file_name));
if(lex_mi->pos)
glob_mi.pos = lex_mi->pos;
if(lex_mi->host)
strmake(glob_mi.host, lex_mi->host, sizeof(glob_mi.host));
if(lex_mi->user)
strmake(glob_mi.user, lex_mi->user, sizeof(glob_mi.user));
if(lex_mi->password)
strmake(glob_mi.password, lex_mi->password, sizeof(glob_mi.password));
if(lex_mi->port)
glob_mi.port = lex_mi->port;
if(lex_mi->connect_retry)
glob_mi.connect_retry = lex_mi->connect_retry;
flush_master_info(&glob_mi);
pthread_mutex_unlock(&glob_mi.lock);
thd->proc_info = "starting slave";
if(slave_was_running)
start_slave(0,0);
thd->proc_info = 0;
send_ok(&thd->net);
return 0;
}
static void reset_master()
{
if(!mysql_bin_log.is_open())
{
my_error(ER_FLUSH_MASTER_BINLOG_CLOSED, MYF(ME_BELL+ME_WAITTANG));
return;
}
LOG_INFO linfo;
if (mysql_bin_log.find_first_log(&linfo, ""))
return;
for(;;)
{
my_delete(linfo.log_file_name, MYF(MY_WME));
if (mysql_bin_log.find_next_log(&linfo))
break;
}
mysql_bin_log.close(1); // exiting close
my_delete(mysql_bin_log.get_index_fname(), MYF(MY_WME));
mysql_bin_log.open(opt_bin_logname,LOG_BIN);
}
int show_binlog_info(THD* thd)
{
DBUG_ENTER("show_binlog_info");
List<Item> field_list;
field_list.push_back(new Item_empty_string("File", FN_REFLEN));
field_list.push_back(new Item_empty_string("Position",20));
field_list.push_back(new Item_empty_string("Binlog_do_db",20));
field_list.push_back(new Item_empty_string("Binlog_ignore_db",20));
if(send_fields(thd, field_list, 1))
DBUG_RETURN(-1);
String* packet = &thd->packet;
packet->length(0);
if(mysql_bin_log.is_open())
{
LOG_INFO li;
mysql_bin_log.get_current_log(&li);
net_store_data(packet, li.log_file_name);
net_store_data(packet, (longlong)li.pos);
net_store_data(packet, &binlog_do_db);
net_store_data(packet, &binlog_ignore_db);
}
else
{
net_store_null(packet);
net_store_null(packet);
net_store_null(packet);
net_store_null(packet);
}
if(my_net_write(&thd->net, (char*)thd->packet.ptr(), packet->length()))
DBUG_RETURN(-1);
send_eof(&thd->net);
DBUG_RETURN(0);
}