Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 308 insertions, 0 deletions

diff --git a/sql/slave.h b/sql/slave.h
new file mode 100644
index 00000000..5ca6054a
--- /dev/null
+++ b/sql/slave.h
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+/* Copyright (c) 2000, 2016, Oracle and/or its affiliates.
+   Copyright (c) 2009, 2016, MariaDB
+
+   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 02110-1335  USA */
+
+#ifndef SLAVE_H
+#define SLAVE_H
+
+/**
+  MASTER_DELAY can be at most (1 << 31) - 1.
+*/
+#define MASTER_DELAY_MAX (0x7FFFFFFF)
+#if INT_MAX < 0x7FFFFFFF
+#error "don't support platforms where INT_MAX < 0x7FFFFFFF"
+#endif
+
+/**
+  @defgroup Replication Replication
+  @{
+
+  @file
+*/
+
+/** 
+   Some of defines are need in parser even though replication is not 
+   compiled in (embedded).
+*/
+
+/**
+   The maximum is defined as (ULONG_MAX/1000) with 4 bytes ulong
+*/
+#define SLAVE_MAX_HEARTBEAT_PERIOD 4294967
+
+#ifdef HAVE_REPLICATION
+
+#include "log.h"
+#include "my_list.h"
+#include "rpl_filter.h"
+#include "rpl_tblmap.h"
+#include "rpl_gtid.h"
+
+#define SLAVE_NET_TIMEOUT  60
+
+#define MAX_SLAVE_ERROR    ER_ERROR_LAST+1
+
+#define MAX_REPLICATION_THREAD 64
+
+// Forward declarations
+class Relay_log_info;
+class Master_info;
+class Master_info_index;
+struct rpl_group_info;
+struct rpl_parallel_thread;
+
+int init_intvar_from_file(int* var, IO_CACHE* f, int default_val);
+int init_strvar_from_file(char *var, int max_size, IO_CACHE *f,
+                          const char *default_val);
+int init_floatvar_from_file(float* var, IO_CACHE* f, float default_val);
+int init_dynarray_intvar_from_file(DYNAMIC_ARRAY* arr, IO_CACHE* f);
+
+/*****************************************************************************
+
+  MySQL Replication
+
+  Replication is implemented via two types of threads:
+
+    I/O Thread - One of these threads is started for each master server.
+                 They maintain a connection to their master server, read log
+                 events from the master as they arrive, and queues them into
+                 a single, shared relay log file.  A Master_info 
+                 represents each of these threads.
+
+    SQL Thread - One of these threads is started and reads from the relay log
+                 file, executing each event.  A Relay_log_info 
+                 represents this thread.
+
+  Buffering in the relay log file makes it unnecessary to reread events from
+  a master server across a slave restart.  It also decouples the slave from
+  the master where long-running updates and event logging are concerned--ie
+  it can continue to log new events while a slow query executes on the slave.
+
+*****************************************************************************/
+
+/*
+  MUTEXES in replication:
+
+  LOCK_active_mi: [note: this was originally meant for multimaster, to switch
+  from a master to another, to protect active_mi] It is used to SERIALIZE ALL
+  administrative commands of replication: START SLAVE, STOP SLAVE, CHANGE
+  MASTER, RESET SLAVE, end_slave() (when mysqld stops) [init_slave() does not
+  need it it's called early]. Any of these commands holds the mutex from the
+  start till the end. This thus protects us against a handful of deadlocks
+  (consider start_slave_thread() which, when starting the I/O thread, releases
+  mi->run_lock, keeps rli->run_lock, and tries to re-acquire mi->run_lock).
+
+  Currently active_mi never moves (it's created at startup and deleted at
+  shutdown, and not changed: it always points to the same Master_info struct),
+  because we don't have multimaster. So for the moment, mi does not move, and
+  mi->rli does not either.
+
+  In Master_info: run_lock, data_lock
+  run_lock protects all information about the run state: slave_running, thd
+  and the existence of the I/O thread (to stop/start it, you need this mutex).
+  data_lock protects some moving members of the struct: counters (log name,
+  position) and relay log (MYSQL_BIN_LOG object).
+
+  In Relay_log_info: run_lock, data_lock
+  see Master_info
+  However, note that run_lock does not protect
+  Relay_log_info.run_state; that is protected by data_lock.
+  
+  Order of acquisition: if you want to have LOCK_active_mi and a run_lock, you
+  must acquire LOCK_active_mi first.
+
+  In MYSQL_BIN_LOG: LOCK_log, LOCK_index of the binlog and the relay log
+  LOCK_log: when you write to it. LOCK_index: when you create/delete a binlog
+  (so that you have to update the .index file).
+*/
+
+extern ulong master_retry_count;
+extern MY_BITMAP slave_error_mask;
+extern char slave_skip_error_names[];
+extern bool use_slave_mask;
+extern char slave_transaction_retry_error_names[];
+extern uint *slave_transaction_retry_errors;
+extern uint slave_transaction_retry_error_length;
+extern char *slave_load_tmpdir;
+extern char *master_info_file;
+extern MYSQL_PLUGIN_IMPORT char *relay_log_info_file;
+extern char *opt_relay_logname, *opt_relaylog_index_name;
+extern my_bool opt_skip_slave_start, opt_reckless_slave;
+extern my_bool opt_log_slave_updates;
+extern char *opt_slave_skip_errors;
+extern char *opt_slave_transaction_retry_errors;
+extern my_bool opt_replicate_annotate_row_events;
+extern ulonglong relay_log_space_limit;
+extern ulonglong opt_read_binlog_speed_limit;
+extern ulonglong slave_skipped_errors;
+extern const char *relay_log_index;
+extern const char *relay_log_basename;
+
+/*
+  4 possible values for Master_info::slave_running and
+  Relay_log_info::slave_running.
+  The values 0,1,2,3 are very important: to keep the diff small, I didn't
+  substitute places where we use 0/1 with the newly defined symbols.
+  So don't change these values.
+  The same way, code is assuming that in Relay_log_info we use only values
+  0/1.
+  I started with using an enum, but
+  enum_variable=1; is not legal so would have required many line changes.
+*/
+#define MYSQL_SLAVE_NOT_RUN         0
+#define MYSQL_SLAVE_RUN_NOT_CONNECT 1
+#define MYSQL_SLAVE_RUN_CONNECT     2
+#define MYSQL_SLAVE_RUN_READING     3
+
+#define RPL_LOG_NAME (rli->group_master_log_name[0] ? rli->group_master_log_name :\
+ "FIRST")
+#define IO_RPL_LOG_NAME (mi->master_log_name[0] ? mi->master_log_name :\
+ "FIRST")
+
+/*
+  If the following is set, if first gives an error, second will be
+  tried. Otherwise, if first fails, we fail.
+*/
+#define SLAVE_FORCE_ALL 4
+
+/*
+  Values for the option --replicate-events-marked-for-skip.
+  Must match the names in replicate_events_marked_for_skip_names in sys_vars.cc
+*/
+#define RPL_SKIP_REPLICATE 0
+#define RPL_SKIP_FILTER_ON_SLAVE 1
+#define RPL_SKIP_FILTER_ON_MASTER 2
+
+
+int init_slave();
+int init_recovery(Master_info* mi, const char** errmsg);
+bool init_slave_skip_errors(const char* arg);
+bool init_slave_transaction_retry_errors(const char* arg);
+int register_slave_on_master(MYSQL* mysql);
+int terminate_slave_threads(Master_info* mi, int thread_mask,
+			     bool skip_lock = 0);
+int start_slave_threads(THD *thd,
+                        bool need_slave_mutex, bool wait_for_start,
+			Master_info* mi, const char* master_info_fname,
+			const char* slave_info_fname, int thread_mask);
+/*
+  cond_lock is usually same as start_lock. It is needed for the case when
+  start_lock is 0 which happens if start_slave_thread() is called already
+  inside the start_lock section, but at the same time we want a
+  mysql_cond_wait() on start_cond, start_lock
+*/
+int start_slave_thread(
+#ifdef HAVE_PSI_INTERFACE
+                       PSI_thread_key thread_key,
+#endif
+                       pthread_handler h_func,
+                       mysql_mutex_t *start_lock,
+                       mysql_mutex_t *cond_lock,
+                       mysql_cond_t *start_cond,
+                       volatile uint *slave_running,
+                       volatile ulong *slave_run_id,
+                       Master_info *mi);
+
+/* If fd is -1, dump to NET */
+int mysql_table_dump(THD* thd, const char* db,
+		     const char* tbl_name, int fd = -1);
+
+/* retrieve table from master and copy to slave*/
+int fetch_master_table(THD* thd, const char* db_name, const char* table_name,
+		       Master_info* mi, MYSQL* mysql, bool overwrite);
+
+void show_master_info_get_fields(THD *thd, List<Item> *field_list,
+                                     bool full, size_t gtid_pos_length);
+bool show_master_info(THD* thd, Master_info* mi, bool full);
+bool show_all_master_info(THD* thd);
+void show_binlog_info_get_fields(THD *thd, List<Item> *field_list);
+bool show_binlog_info(THD* thd);
+bool rpl_master_has_bug(const Relay_log_info *rli, uint bug_id, bool report,
+                        bool (*pred)(const void *), const void *param);
+bool rpl_master_erroneous_autoinc(THD* thd);
+
+const char *print_slave_db_safe(const char *db);
+void skip_load_data_infile(NET* net);
+
+void slave_prepare_for_shutdown();
+void end_slave(); /* release slave threads */
+void close_active_mi(); /* clean up slave threads data */
+void clear_until_condition(Relay_log_info* rli);
+void clear_slave_error(Relay_log_info* rli);
+void end_relay_log_info(Relay_log_info* rli);
+void init_thread_mask(int* mask,Master_info* mi,bool inverse);
+Format_description_log_event *
+read_relay_log_description_event(IO_CACHE *cur_log, ulonglong start_pos,
+                                 const char **errmsg);
+
+int init_relay_log_pos(Relay_log_info* rli,const char* log,ulonglong pos,
+		       bool need_data_lock, const char** errmsg,
+                       bool look_for_description_event);
+
+int purge_relay_logs(Relay_log_info* rli, THD *thd, bool just_reset,
+		     const char** errmsg);
+void set_slave_thread_options(THD* thd);
+void set_slave_thread_default_charset(THD *thd, rpl_group_info *rgi);
+int rotate_relay_log(Master_info* mi);
+int has_temporary_error(THD *thd);
+int sql_delay_event(Log_event *ev, THD *thd, rpl_group_info *rgi);
+int apply_event_and_update_pos(Log_event* ev, THD* thd,
+                               struct rpl_group_info *rgi);
+int apply_event_and_update_pos_for_parallel(Log_event* ev, THD* thd,
+                                            struct rpl_group_info *rgi);
+
+int init_intvar_from_file(int* var, IO_CACHE* f, int default_val);
+int init_floatvar_from_file(float* var, IO_CACHE* f, float default_val);
+int init_strvar_from_file(char *var, int max_size, IO_CACHE *f,
+                          const char *default_val);
+int init_dynarray_intvar_from_file(DYNAMIC_ARRAY* arr, IO_CACHE* f);
+
+pthread_handler_t handle_slave_io(void *arg);
+void slave_output_error_info(rpl_group_info *rgi, THD *thd);
+pthread_handler_t handle_slave_sql(void *arg);
+bool net_request_file(NET* net, const char* fname);
+void slave_background_kill_request(THD *to_kill);
+void slave_background_gtid_pos_create_request
+        (rpl_slave_state::gtid_pos_table *table_entry);
+void slave_background_gtid_pending_delete_request(void);
+
+extern Master_info *active_mi; /* active_mi for multi-master */
+extern Master_info *default_master_info; /* To replace active_mi */
+extern Master_info_index *master_info_index;
+extern LEX_CSTRING default_master_connection_name;
+extern my_bool replicate_same_server_id;
+
+extern int disconnect_slave_event_count, abort_slave_event_count ;
+
+/* the master variables are defaults read from my.cnf or command line */
+extern uint report_port;
+extern char *master_info_file, *report_user;
+extern char *report_host, *report_password;
+
+extern I_List<THD> threads;
+
+#else
+#define close_active_mi() /* no-op */
+#endif /* HAVE_REPLICATION */
+
+/* masks for start/stop operations on io and sql slave threads */
+#define SLAVE_IO  1
+#define SLAVE_SQL 2
+
+/**
+  @} (end of group Replication)
+*/
+
+#endif