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/*
Copyright (c) 2006, 2016, Oracle and/or its affiliates. All rights reserved.
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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "ha_ndbcluster_glue.h"
#ifdef WITH_NDBCLUSTER_STORAGE_ENGINE
#include "ha_ndbcluster.h"
#include "ha_ndbcluster_connection.h"
#include "ndb_local_connection.h"
#include "ndb_thd.h"
#include "ndb_table_guard.h"
#include "ndb_global_schema_lock.h"
#include "ndb_global_schema_lock_guard.h"
#include "rpl_injector.h"
#include "rpl_filter.h"
#if MYSQL_VERSION_ID > 50600
#include "rpl_slave.h"
#else
#include "slave.h"
#include "log_event.h"
#endif
#include "global_threads.h"
#include "ha_ndbcluster_binlog.h"
#include <ndbapi/NdbDictionary.hpp>
#include <ndbapi/ndb_cluster_connection.hpp>
extern my_bool opt_ndb_log_orig;
extern my_bool opt_ndb_log_bin;
extern my_bool opt_ndb_log_update_as_write;
extern my_bool opt_ndb_log_updated_only;
extern my_bool opt_ndb_log_binlog_index;
extern my_bool opt_ndb_log_apply_status;
extern ulong opt_ndb_extra_logging;
extern st_ndb_slave_state g_ndb_slave_state;
bool ndb_log_empty_epochs(void);
/*
defines for cluster replication table names
*/
#include "ha_ndbcluster_tables.h"
#include "ndb_dist_priv_util.h"
/*
Timeout for syncing schema events between
mysql servers, and between mysql server and the binlog
*/
static const int DEFAULT_SYNC_TIMEOUT= 120;
/*
Flag showing if the ndb injector thread is running, if so == 1
-1 if it was started but later stopped for some reason
0 if never started
*/
static int ndb_binlog_thread_running= 0;
/*
Flag showing if the ndb binlog should be created, if so == TRUE
FALSE if not
*/
my_bool ndb_binlog_running= FALSE;
static my_bool ndb_binlog_tables_inited= FALSE;
static my_bool ndb_binlog_is_ready= FALSE;
bool
ndb_binlog_is_read_only(void)
{
if(!ndb_binlog_tables_inited)
{
/* the ndb_* system tables not setup yet */
return true;
}
if (ndb_binlog_running && !ndb_binlog_is_ready)
{
/*
The binlog thread is supposed to write to binlog
but not ready (still initializing or has lost connection)
*/
return true;
}
return false;
}
/*
Global reference to the ndb injector thread THD oject
Has one sole purpose, for setting the in_use table member variable
in get_share(...)
*/
extern THD * injector_thd; // Declared in ha_ndbcluster.cc
/*
Global reference to ndb injector thd object.
Used mainly by the binlog index thread, but exposed to the client sql
thread for one reason; to setup the events operations for a table
to enable ndb injector thread receiving events.
Must therefore always be used with a surrounding
pthread_mutex_lock(&injector_mutex), when doing create/dropEventOperation
*/
static Ndb *injector_ndb= 0;
static Ndb *schema_ndb= 0;
static int ndbcluster_binlog_inited= 0;
/*
Flag "ndbcluster_binlog_terminating" set when shutting down mysqld.
Server main loop should call handlerton function:
ndbcluster_hton->binlog_func ==
ndbcluster_binlog_func(...,BFN_BINLOG_END,...) ==
ndbcluster_binlog_end
at shutdown, which sets the flag. And then server needs to wait for it
to complete. Otherwise binlog will not be complete.
ndbcluster_hton->panic == ndbcluster_end() will not return until
ndb binlog is completed
*/
static int ndbcluster_binlog_terminating= 0;
/*
Mutex and condition used for interacting between client sql thread
and injector thread
*/
pthread_t ndb_binlog_thread;
pthread_mutex_t injector_mutex;
pthread_cond_t injector_cond;
/* NDB Injector thread (used for binlog creation) */
static ulonglong ndb_latest_applied_binlog_epoch= 0;
static ulonglong ndb_latest_handled_binlog_epoch= 0;
static ulonglong ndb_latest_received_binlog_epoch= 0;
NDB_SHARE *ndb_apply_status_share= 0;
NDB_SHARE *ndb_schema_share= 0;
pthread_mutex_t ndb_schema_share_mutex;
extern my_bool opt_log_slave_updates;
static my_bool g_ndb_log_slave_updates;
/* Schema object distribution handling */
HASH ndb_schema_objects;
typedef struct st_ndb_schema_object {
pthread_mutex_t mutex;
char *key;
uint key_length;
uint use_count;
MY_BITMAP slock_bitmap;
uint32 slock[256/32]; // 256 bits for lock status of table
uint32 table_id;
uint32 table_version;
} NDB_SCHEMA_OBJECT;
static NDB_SCHEMA_OBJECT *ndb_get_schema_object(const char *key,
my_bool create_if_not_exists,
my_bool have_lock);
static void ndb_free_schema_object(NDB_SCHEMA_OBJECT **ndb_schema_object,
bool have_lock);
#ifndef DBUG_OFF
/* purecov: begin deadcode */
static void print_records(TABLE *table, const uchar *record)
{
for (uint j= 0; j < table->s->fields; j++)
{
char buf[40];
int pos= 0;
Field *field= table->field[j];
const uchar* field_ptr= field->ptr - table->record[0] + record;
int pack_len= field->pack_length();
int n= pack_len < 10 ? pack_len : 10;
for (int i= 0; i < n && pos < 20; i++)
{
pos+= sprintf(&buf[pos]," %x", (int) (uchar) field_ptr[i]);
}
buf[pos]= 0;
DBUG_PRINT("info",("[%u]field_ptr[0->%d]: %s", j, n, buf));
}
}
/* purecov: end */
#else
#define print_records(a,b)
#endif
#ifndef DBUG_OFF
static void dbug_print_table(const char *info, TABLE *table)
{
if (table == 0)
{
DBUG_PRINT("info",("%s: (null)", info));
return;
}
DBUG_PRINT("info",
("%s: %s.%s s->fields: %d "
"reclength: %lu rec_buff_length: %u record[0]: 0x%lx "
"record[1]: 0x%lx",
info,
table->s->db.str,
table->s->table_name.str,
table->s->fields,
table->s->reclength,
table->s->rec_buff_length,
(long) table->record[0],
(long) table->record[1]));
for (unsigned int i= 0; i < table->s->fields; i++)
{
Field *f= table->field[i];
DBUG_PRINT("info",
("[%d] \"%s\"(0x%lx:%s%s%s%s%s%s) type: %d pack_length: %d "
"ptr: 0x%lx[+%d] null_bit: %u null_ptr: 0x%lx[+%d]",
i,
f->field_name,
(long) f->flags,
(f->flags & PRI_KEY_FLAG) ? "pri" : "attr",
(f->flags & NOT_NULL_FLAG) ? "" : ",nullable",
(f->flags & UNSIGNED_FLAG) ? ",unsigned" : ",signed",
(f->flags & ZEROFILL_FLAG) ? ",zerofill" : "",
(f->flags & BLOB_FLAG) ? ",blob" : "",
(f->flags & BINARY_FLAG) ? ",binary" : "",
f->real_type(),
f->pack_length(),
(long) f->ptr, (int) (f->ptr - table->record[0]),
f->null_bit,
(long) f->null_ptr,
(int) ((uchar*) f->null_ptr - table->record[0])));
if (f->type() == MYSQL_TYPE_BIT)
{
Field_bit *g= (Field_bit*) f;
DBUG_PRINT("MYSQL_TYPE_BIT",("field_length: %d bit_ptr: 0x%lx[+%d] "
"bit_ofs: %d bit_len: %u",
g->field_length, (long) g->bit_ptr,
(int) ((uchar*) g->bit_ptr -
table->record[0]),
g->bit_ofs, g->bit_len));
}
}
}
#else
#define dbug_print_table(a,b)
#endif
static inline void
print_warning_list(const char* prefix, THD* thd)
{
Diagnostics_area::Sql_condition_iterator
it(thd->get_stmt_da()->sql_conditions());
const Sql_condition *err;
while ((err= it++))
{
sql_print_warning("%s: (%d)%s",
prefix,
err->get_sql_errno(),
err->get_message_text());
}
}
static void run_query(THD *thd, char *buf, char *end,
const int *no_print_error)
{
/*
NOTE! Don't use this function for new implementation, backward
compat. only
*/
Ndb_local_connection mysqld(thd);
/*
Run the query, suppress some errors from being printed
to log and ignore any error returned
*/
(void)mysqld.raw_run_query(buf, (end - buf),
no_print_error);
}
static void
ndbcluster_binlog_close_table(THD *thd, NDB_SHARE *share)
{
DBUG_ENTER("ndbcluster_binlog_close_table");
Ndb_event_data *event_data= share->event_data;
if (event_data)
{
delete event_data;
share->event_data= 0;
}
DBUG_VOID_RETURN;
}
/*
Open a shadow table for the table given in share.
- The shadow table is (mainly) used when an event is
recieved from the data nodes which need to be written
to the binlog injector.
*/
static int
ndb_binlog_open_shadow_table(THD *thd, NDB_SHARE *share)
{
int error;
DBUG_ASSERT(share->event_data == 0);
Ndb_event_data *event_data= share->event_data= new Ndb_event_data(share);
DBUG_ENTER("ndb_binlog_open_shadow_table");
MEM_ROOT **root_ptr=
my_pthread_getspecific_ptr(MEM_ROOT**, THR_MALLOC);
MEM_ROOT *old_root= *root_ptr;
init_sql_alloc(&event_data->mem_root, 1024, 0);
*root_ptr= &event_data->mem_root;
TABLE_SHARE *shadow_table_share=
(TABLE_SHARE*)alloc_root(&event_data->mem_root, sizeof(TABLE_SHARE));
TABLE *shadow_table=
(TABLE*)alloc_root(&event_data->mem_root, sizeof(TABLE));
init_tmp_table_share(thd, shadow_table_share,
share->db, 0,
share->table_name,
share->key);
if ((error= open_table_def(thd, shadow_table_share, 0)) ||
(error= open_table_from_share(thd, shadow_table_share, "", 0,
(uint) (OPEN_FRM_FILE_ONLY | DELAYED_OPEN | READ_ALL),
0, shadow_table,
#ifdef NDB_WITHOUT_ONLINE_ALTER
false
#else
OTM_OPEN
#endif
)))
{
DBUG_PRINT("error", ("failed to open shadow table, error: %d my_errno: %d",
error, my_errno));
free_table_share(shadow_table_share);
delete event_data;
share->event_data= 0;
*root_ptr= old_root;
DBUG_RETURN(error);
}
event_data->shadow_table= shadow_table;
mysql_mutex_lock(&LOCK_open);
assign_new_table_id(shadow_table_share);
mysql_mutex_unlock(&LOCK_open);
shadow_table->in_use= injector_thd;
shadow_table->s->db.str= share->db;
shadow_table->s->db.length= strlen(share->db);
shadow_table->s->table_name.str= share->table_name;
shadow_table->s->table_name.length= strlen(share->table_name);
/* We can't use 'use_all_columns()' as the file object is not setup yet */
shadow_table->column_bitmaps_set_no_signal(&shadow_table->s->all_set,
&shadow_table->s->all_set);
#ifndef DBUG_OFF
dbug_print_table("table", shadow_table);
#endif
*root_ptr= old_root;
DBUG_RETURN(0);
}
/*
Initialize the binlog part of the NDB_SHARE
*/
int ndbcluster_binlog_init_share(THD *thd, NDB_SHARE *share, TABLE *_table)
{
MEM_ROOT *mem_root= &share->mem_root;
int do_event_op= ndb_binlog_running;
int error= 0;
DBUG_ENTER("ndbcluster_binlog_init_share");
share->connect_count= g_ndb_cluster_connection->get_connect_count();
#ifdef HAVE_NDB_BINLOG
share->m_cfn_share= NULL;
#endif
share->op= 0;
share->new_op= 0;
share->event_data= 0;
if (!ndb_schema_share &&
strcmp(share->db, NDB_REP_DB) == 0 &&
strcmp(share->table_name, NDB_SCHEMA_TABLE) == 0)
do_event_op= 1;
else if (!ndb_apply_status_share &&
strcmp(share->db, NDB_REP_DB) == 0 &&
strcmp(share->table_name, NDB_APPLY_TABLE) == 0)
do_event_op= 1;
if (Ndb_dist_priv_util::is_distributed_priv_table(share->db,
share->table_name))
{
do_event_op= 0;
}
{
int i, no_nodes= g_ndb_cluster_connection->no_db_nodes();
share->subscriber_bitmap= (MY_BITMAP*)
alloc_root(mem_root, no_nodes * sizeof(MY_BITMAP));
for (i= 0; i < no_nodes; i++)
{
bitmap_init(&share->subscriber_bitmap[i],
(Uint32*)alloc_root(mem_root, max_ndb_nodes/8),
max_ndb_nodes, FALSE);
bitmap_clear_all(&share->subscriber_bitmap[i]);
}
}
if (!do_event_op)
{
if (_table)
{
if (_table->s->primary_key == MAX_KEY)
share->flags|= NSF_HIDDEN_PK;
if (_table->s->blob_fields != 0)
share->flags|= NSF_BLOB_FLAG;
}
else
{
share->flags|= NSF_NO_BINLOG;
}
DBUG_RETURN(error);
}
while (1)
{
if ((error= ndb_binlog_open_shadow_table(thd, share)))
break;
if (share->event_data->shadow_table->s->primary_key == MAX_KEY)
share->flags|= NSF_HIDDEN_PK;
if (share->event_data->shadow_table->s->blob_fields != 0)
share->flags|= NSF_BLOB_FLAG;
break;
}
DBUG_RETURN(error);
}
/*****************************************************************
functions called from master sql client threads
****************************************************************/
/*
called in mysql_show_binlog_events and reset_logs to make sure we wait for
all events originating from this mysql server to arrive in the binlog
Wait for the last epoch in which the last transaction is a part of.
Wait a maximum of 30 seconds.
*/
static void ndbcluster_binlog_wait(THD *thd)
{
if (ndb_binlog_running)
{
DBUG_ENTER("ndbcluster_binlog_wait");
ulonglong wait_epoch= ndb_get_latest_trans_gci();
/*
cluster not connected or no transactions done
so nothing to wait for
*/
if (!wait_epoch)
DBUG_VOID_RETURN;
const char *save_info= thd ? thd->proc_info : 0;
int count= 30;
if (thd)
thd->proc_info= "Waiting for ndbcluster binlog update to "
"reach current position";
pthread_mutex_lock(&injector_mutex);
while (!(thd && thd->killed) && count && ndb_binlog_running &&
(ndb_latest_handled_binlog_epoch == 0 ||
ndb_latest_handled_binlog_epoch < wait_epoch))
{
count--;
struct timespec abstime;
set_timespec(abstime, 1);
pthread_cond_timedwait(&injector_cond, &injector_mutex, &abstime);
}
pthread_mutex_unlock(&injector_mutex);
if (thd)
thd->proc_info= save_info;
DBUG_VOID_RETURN;
}
}
/*
Called from MYSQL_BIN_LOG::reset_logs in log.cc when binlog is emptied
*/
static int ndbcluster_reset_logs(THD *thd)
{
if (!ndb_binlog_running)
return 0;
/* only reset master should reset logs */
if (!((thd->lex->sql_command == SQLCOM_RESET) &&
(thd->lex->type & REFRESH_MASTER)))
return 0;
DBUG_ENTER("ndbcluster_reset_logs");
/*
Wait for all events originating from this mysql server has
reached the binlog before continuing to reset
*/
ndbcluster_binlog_wait(thd);
/*
Truncate mysql.ndb_binlog_index table, if table does not
exist ignore the error as it is a "consistent" behavior
*/
Ndb_local_connection mysqld(thd);
const bool ignore_no_such_table = true;
if(mysqld.truncate_table(STRING_WITH_LEN("mysql"),
STRING_WITH_LEN("ndb_binlog_index"),
ignore_no_such_table))
{
// Failed to truncate table
DBUG_RETURN(1);
}
DBUG_RETURN(0);
}
/*
Setup THD object
'Inspired' from ha_ndbcluster.cc : ndb_util_thread_func
*/
static THD *
setup_thd(char * stackptr)
{
DBUG_ENTER("setup_thd");
THD * thd= new THD; /* note that contructor of THD uses DBUG_ */
if (thd == 0)
{
DBUG_RETURN(0);
}
THD_CHECK_SENTRY(thd);
thd->thread_id= 0;
thd->thread_stack= stackptr; /* remember where our stack is */
if (thd->store_globals())
{
thd->cleanup();
delete thd;
DBUG_RETURN(0);
}
lex_start(thd);
thd->init_for_queries();
thd_set_command(thd, COM_DAEMON);
thd->system_thread= SYSTEM_THREAD_NDBCLUSTER_BINLOG;
#ifndef NDB_THD_HAS_NO_VERSION
thd->version= refresh_version;
#endif
thd->client_capabilities= 0;
thd->lex->start_transaction_opt= 0;
thd->security_ctx->skip_grants();
CHARSET_INFO *charset_connection= get_charset_by_csname("utf8",
MY_CS_PRIMARY,
MYF(MY_WME));
thd->variables.character_set_client= charset_connection;
thd->variables.character_set_results= charset_connection;
thd->variables.collation_connection= charset_connection;
thd->update_charset();
DBUG_RETURN(thd);
}
/*
Called from MYSQL_BIN_LOG::purge_logs in log.cc when the binlog "file"
is removed
*/
static int
ndbcluster_binlog_index_purge_file(THD *thd, const char *file)
{
int error = 0;
THD * save_thd= thd;
DBUG_ENTER("ndbcluster_binlog_index_purge_file");
DBUG_PRINT("enter", ("file: %s", file));
if (!ndb_binlog_running || (thd && thd->slave_thread))
DBUG_RETURN(0);
/**
* This function really really needs a THD object,
* new/delete one if not available...yuck!
*/
if (thd == 0)
{
if ((thd = setup_thd((char*)&save_thd)) == 0)
{
/**
* TODO return proper error code here,
* BUT! return code is not (currently) checked in
* log.cc : purge_index_entry() so we settle for warning printout
*/
sql_print_warning("NDB: Unable to purge "
NDB_REP_DB "." NDB_REP_TABLE
" File=%s (failed to setup thd)", file);
DBUG_RETURN(0);
}
}
/*
delete rows from mysql.ndb_binlog_index table for the given
filename, if table does not exist ignore the error as it
is a "consistent" behavior
*/
Ndb_local_connection mysqld(thd);
const bool ignore_no_such_table = true;
if(mysqld.delete_rows(STRING_WITH_LEN("mysql"),
STRING_WITH_LEN("ndb_binlog_index"),
ignore_no_such_table,
"File='", file, "'", NULL))
{
// Failed to delete rows from table
error = 1;
}
if (save_thd == 0)
{
thd->cleanup();
delete thd;
}
DBUG_RETURN(error);
}
#ifndef NDB_WITHOUT_DIST_PRIV
// Determine if privilege tables are distributed, ie. stored in NDB
static bool
priv_tables_are_in_ndb(THD *thd)
{
bool distributed= false;
Ndb_dist_priv_util dist_priv;
DBUG_ENTER("ndbcluster_distributed_privileges");
Ndb *ndb= check_ndb_in_thd(thd);
if (!ndb)
DBUG_RETURN(false); // MAGNUS, error message?
if (ndb->setDatabaseName(dist_priv.database()) != 0)
DBUG_RETURN(false);
const char* table_name;
while((table_name= dist_priv.iter_next_table()))
{
DBUG_PRINT("info", ("table_name: %s", table_name));
Ndb_table_guard ndbtab_g(ndb->getDictionary(), table_name);
const NDBTAB *ndbtab= ndbtab_g.get_table();
if (ndbtab)
{
distributed= true;
}
else if (distributed)
{
sql_print_error("NDB: Inconsistency detected in distributed "
"privilege tables. Table '%s.%s' is not distributed",
dist_priv.database(), table_name);
DBUG_RETURN(false);
}
}
DBUG_RETURN(distributed);
}
#endif
static void
ndbcluster_binlog_log_query(handlerton *hton, THD *thd, enum_binlog_command binlog_command,
const char *query, uint query_length,
const char *db, const char *table_name)
{
DBUG_ENTER("ndbcluster_binlog_log_query");
DBUG_PRINT("enter", ("db: %s table_name: %s query: %s",
db, table_name, query));
enum SCHEMA_OP_TYPE type;
int log= 0;
uint32 table_id= 0, table_version= 0;
/*
Since databases aren't real ndb schema object
they don't have any id/version
But since that id/version is used to make sure that event's on SCHEMA_TABLE
is correct, we set random numbers
*/
table_id = (uint32)rand();
table_version = (uint32)rand();
switch (binlog_command)
{
case LOGCOM_CREATE_TABLE:
type= SOT_CREATE_TABLE;
DBUG_ASSERT(FALSE);
break;
case LOGCOM_ALTER_TABLE:
type= SOT_ALTER_TABLE_COMMIT;
//log= 1;
break;
case LOGCOM_RENAME_TABLE:
type= SOT_RENAME_TABLE;
DBUG_ASSERT(FALSE);
break;
case LOGCOM_DROP_TABLE:
type= SOT_DROP_TABLE;
DBUG_ASSERT(FALSE);
break;
case LOGCOM_CREATE_DB:
type= SOT_CREATE_DB;
log= 1;
break;
case LOGCOM_ALTER_DB:
type= SOT_ALTER_DB;
log= 1;
break;
case LOGCOM_DROP_DB:
type= SOT_DROP_DB;
DBUG_ASSERT(FALSE);
break;
#ifndef NDB_WITHOUT_DIST_PRIV
case LOGCOM_CREATE_USER:
type= SOT_CREATE_USER;
if (priv_tables_are_in_ndb(thd))
{
DBUG_PRINT("info", ("Privilege tables have been distributed, logging statement"));
log= 1;
}
break;
case LOGCOM_DROP_USER:
type= SOT_DROP_USER;
if (priv_tables_are_in_ndb(thd))
{
DBUG_PRINT("info", ("Privilege tables have been distributed, logging statement"));
log= 1;
}
break;
case LOGCOM_RENAME_USER:
type= SOT_RENAME_USER;
if (priv_tables_are_in_ndb(thd))
{
DBUG_PRINT("info", ("Privilege tables have been distributed, logging statement"));
log= 1;
}
break;
case LOGCOM_GRANT:
type= SOT_GRANT;
if (priv_tables_are_in_ndb(thd))
{
DBUG_PRINT("info", ("Privilege tables have been distributed, logging statement"));
log= 1;
}
break;
case LOGCOM_REVOKE:
type= SOT_REVOKE;
if (priv_tables_are_in_ndb(thd))
{
DBUG_PRINT("info", ("Privilege tables have been distributed, logging statement"));
log= 1;
}
break;
#endif
}
if (log)
{
ndbcluster_log_schema_op(thd, query, query_length,
db, table_name, table_id, table_version, type,
NULL, NULL);
}
DBUG_VOID_RETURN;
}
/*
End use of the NDB Cluster binlog
- wait for binlog thread to shutdown
*/
int ndbcluster_binlog_end(THD *thd)
{
DBUG_ENTER("ndbcluster_binlog_end");
if (ndb_util_thread_running > 0)
{
/*
Wait for util thread to die (as this uses the injector mutex)
There is a very small change that ndb_util_thread dies and the
following mutex is freed before it's accessed. This shouldn't
however be a likely case as the ndbcluster_binlog_end is supposed to
be called before ndb_cluster_end().
*/
sql_print_information("Stopping Cluster Utility thread");
pthread_mutex_lock(&LOCK_ndb_util_thread);
/* Ensure mutex are not freed if ndb_cluster_end is running at same time */
ndb_util_thread_running++;
ndbcluster_terminating= 1;
pthread_cond_signal(&COND_ndb_util_thread);
while (ndb_util_thread_running > 1)
pthread_cond_wait(&COND_ndb_util_ready, &LOCK_ndb_util_thread);
ndb_util_thread_running--;
pthread_mutex_unlock(&LOCK_ndb_util_thread);
}
if (ndb_index_stat_thread_running > 0)
{
/*
Index stats thread blindly imitates util thread. Following actually
fixes some "[Warning] Plugin 'ndbcluster' will be forced to shutdown".
*/
sql_print_information("Stopping Cluster Index Stats thread");
pthread_mutex_lock(&LOCK_ndb_index_stat_thread);
/* Ensure mutex are not freed if ndb_cluster_end is running at same time */
ndb_index_stat_thread_running++;
ndbcluster_terminating= 1;
pthread_cond_signal(&COND_ndb_index_stat_thread);
while (ndb_index_stat_thread_running > 1)
pthread_cond_wait(&COND_ndb_index_stat_ready, &LOCK_ndb_index_stat_thread);
ndb_index_stat_thread_running--;
pthread_mutex_unlock(&LOCK_ndb_index_stat_thread);
}
if (ndbcluster_binlog_inited)
{
ndbcluster_binlog_inited= 0;
if (ndb_binlog_thread_running)
{
/* wait for injector thread to finish */
ndbcluster_binlog_terminating= 1;
pthread_mutex_lock(&injector_mutex);
pthread_cond_signal(&injector_cond);
while (ndb_binlog_thread_running > 0)
pthread_cond_wait(&injector_cond, &injector_mutex);
pthread_mutex_unlock(&injector_mutex);
}
pthread_mutex_destroy(&injector_mutex);
pthread_cond_destroy(&injector_cond);
pthread_mutex_destroy(&ndb_schema_share_mutex);
}
DBUG_RETURN(0);
}
/*****************************************************************
functions called from slave sql client threads
****************************************************************/
static void ndbcluster_reset_slave(THD *thd)
{
int error = 0;
if (!ndb_binlog_running)
return;
DBUG_ENTER("ndbcluster_reset_slave");
/*
delete all rows from mysql.ndb_apply_status table
- if table does not exist ignore the error as it
is a consistent behavior
*/
Ndb_local_connection mysqld(thd);
const bool ignore_no_such_table = true;
if(mysqld.delete_rows(STRING_WITH_LEN("mysql"),
STRING_WITH_LEN("ndb_apply_status"),
ignore_no_such_table,
NULL))
{
// Failed to delete rows from table
error = 1;
}
g_ndb_slave_state.atResetSlave();
// pending fix for bug#59844 will make this function return int
DBUG_VOID_RETURN;
}
/*
Initialize the binlog part of the ndb handlerton
*/
/**
Upon the sql command flush logs, we need to ensure that all outstanding
ndb data to be logged has made it to the binary log to get a deterministic
behavior on the rotation of the log.
*/
static bool ndbcluster_flush_logs(handlerton *hton, ulonglong target_lsn)
{
if (target_lsn == 0)
ndbcluster_binlog_wait(current_thd);
return FALSE;
}
static int ndbcluster_binlog_func(handlerton *hton, THD *thd,
enum_binlog_func fn,
void *arg)
{
DBUG_ENTER("ndbcluster_binlog_func");
int res= 0;
switch(fn)
{
case BFN_RESET_LOGS:
res= ndbcluster_reset_logs(thd);
break;
case BFN_RESET_SLAVE:
ndbcluster_reset_slave(thd);
break;
case BFN_BINLOG_WAIT:
ndbcluster_binlog_wait(thd);
break;
case BFN_BINLOG_END:
res= ndbcluster_binlog_end(thd);
break;
case BFN_BINLOG_PURGE_FILE:
res= ndbcluster_binlog_index_purge_file(thd, (const char *)arg);
break;
}
DBUG_RETURN(res);
}
void ndbcluster_binlog_init_handlerton()
{
handlerton *h= ndbcluster_hton;
h->flush_logs= ndbcluster_flush_logs;
h->binlog_func= ndbcluster_binlog_func;
h->binlog_log_query= ndbcluster_binlog_log_query;
}
/*
Convert db and table name into a key to use for searching
the ndbcluster_open_tables hash
*/
static size_t
ndb_open_tables__create_key(char* key_buf, size_t key_buf_length,
const char* db, size_t db_length,
const char* table, size_t table_length)
{
size_t key_length = my_snprintf(key_buf, key_buf_length,
"./%*s/%*s", db_length, db,
table_length, table) - 1;
assert(key_length > 0);
assert(key_length < key_buf_length);
return key_length;
}
/*
Check if table with given name is open, ie. is
in ndbcluster_open_tables hash
*/
static bool
ndb_open_tables__is_table_open(const char* db, size_t db_length,
const char* table, size_t table_length)
{
char key[FN_REFLEN + 1];
size_t key_length = ndb_open_tables__create_key(key, sizeof(key),
db, db_length,
table, table_length);
DBUG_ENTER("ndb_open_tables__is_table_open");
DBUG_PRINT("enter", ("db: '%s', table: '%s', key: '%s'",
db, table, key));
pthread_mutex_lock(&ndbcluster_mutex);
bool result = my_hash_search(&ndbcluster_open_tables,
(const uchar*)key,
key_length) != NULL;
pthread_mutex_unlock(&ndbcluster_mutex);
DBUG_PRINT("exit", ("result: %d", result));
DBUG_RETURN(result);
}
static bool
ndbcluster_check_ndb_schema_share()
{
return ndb_open_tables__is_table_open(STRING_WITH_LEN("mysql"),
STRING_WITH_LEN("ndb_schema"));
}
static bool