diff options
Diffstat (limited to 'sql/log.cc')
| -rw-r--r-- | sql/log.cc | 228 |
1 files changed, 213 insertions, 15 deletions
diff --git a/sql/log.cc b/sql/log.cc index be8b24da8df..e5ff85e4544 100644 --- a/sql/log.cc +++ b/sql/log.cc @@ -2391,7 +2391,7 @@ File open_binlog(IO_CACHE *log, const char *log_file_name, const char **errmsg) *errmsg = "Could not open log file"; goto err; } - if (init_io_cache(log, file, binlog_file_cache_size, READ_CACHE, 0, 0, + if (init_io_cache(log, file, (size_t)binlog_file_cache_size, READ_CACHE, 0, 0, MYF(MY_WME|MY_DONT_CHECK_FILESIZE))) { sql_print_error("Failed to create a cache on log (file '%s')", @@ -4171,14 +4171,6 @@ bool MYSQL_BIN_LOG::reset_logs(THD *thd, bool create_new_log, mysql_mutex_unlock(&LOCK_xid_list); } - /* - The following mutex is needed to ensure that no threads call - 'delete thd' as we would then risk missing a 'rollback' from this - thread. If the transaction involved MyISAM tables, it should go - into binlog even on rollback. - */ - mysql_mutex_lock(&LOCK_thread_count); - /* Save variables so that we can reopen the log */ save_name=name; name=0; // Protect against free @@ -4285,7 +4277,6 @@ bool MYSQL_BIN_LOG::reset_logs(THD *thd, bool create_new_log, err: if (error == 1) name= const_cast<char*>(save_name); - mysql_mutex_unlock(&LOCK_thread_count); if (!is_relay_log) { @@ -6674,6 +6665,120 @@ void MYSQL_BIN_LOG::checkpoint_and_purge(ulong binlog_id) purge(); } + +/** + Searches for the first (oldest) binlog file name in in the binlog index. + + @param[in,out] buf_arg pointer to a buffer to hold found + the first binary log file name + @return NULL on success, otherwise error message +*/ +static const char* get_first_binlog(char* buf_arg) +{ + IO_CACHE *index_file; + size_t length; + char fname[FN_REFLEN]; + const char* errmsg= NULL; + + DBUG_ENTER("get_first_binlog"); + + DBUG_ASSERT(mysql_bin_log.is_open()); + + mysql_bin_log.lock_index(); + + index_file=mysql_bin_log.get_index_file(); + if (reinit_io_cache(index_file, READ_CACHE, (my_off_t) 0, 0, 0)) + { + errmsg= "failed to create a cache on binlog index"; + goto end; + } + /* The file ends with EOF or empty line */ + if ((length=my_b_gets(index_file, fname, sizeof(fname))) <= 1) + { + errmsg= "empty binlog index"; + goto end; + } + else + { + fname[length-1]= 0; // Remove end \n + } + if (normalize_binlog_name(buf_arg, fname, false)) + { + errmsg= "cound not normalize the first file name in the binlog index"; + goto end; + } +end: + mysql_bin_log.unlock_index(); + + DBUG_RETURN(errmsg); +} + +/** + Check weather the gtid binlog state can safely remove gtid + domains passed as the argument. A safety condition is satisfied when + there are no events from the being deleted domains in the currently existing + binlog files. Upon successful check the supplied domains are removed + from @@gtid_binlog_state. The caller is supposed to rotate binlog so that + the active latest file won't have the deleted domains in its Gtid_list header. + + @param domain_drop_lex gtid domain id sequence from lex. + Passed as a pointer to dynamic array must be not empty + unless pointer value NULL. + @retval zero on success + @retval > 0 ineffective call none from the *non* empty + gtid domain sequence is deleted + @retval < 0 on error +*/ +static int do_delete_gtid_domain(DYNAMIC_ARRAY *domain_drop_lex) +{ + int rc= 0; + Gtid_list_log_event *glev= NULL; + char buf[FN_REFLEN]; + File file; + IO_CACHE cache; + const char* errmsg= NULL; + char errbuf[MYSQL_ERRMSG_SIZE]= {0}; + + if (!domain_drop_lex) + return 0; // still "effective" having empty domain sequence to delete + + DBUG_ASSERT(domain_drop_lex->elements > 0); + mysql_mutex_assert_owner(mysql_bin_log.get_log_lock()); + + if ((errmsg= get_first_binlog(buf)) != NULL) + goto end; + bzero((char*) &cache, sizeof(cache)); + if ((file= open_binlog(&cache, buf, &errmsg)) == (File) -1) + goto end; + errmsg= get_gtid_list_event(&cache, &glev); + end_io_cache(&cache); + mysql_file_close(file, MYF(MY_WME)); + + DBUG_EXECUTE_IF("inject_binlog_delete_domain_init_error", + errmsg= "injected error";); + if (errmsg) + goto end; + errmsg= rpl_global_gtid_binlog_state.drop_domain(domain_drop_lex, + glev, errbuf); + +end: + if (errmsg) + { + if (strlen(errmsg) > 0) + { + my_error(ER_BINLOG_CANT_DELETE_GTID_DOMAIN, MYF(0), errmsg); + rc= -1; + } + else + { + rc= 1; + } + } + delete glev; + + return rc; +} + /** The method is a shortcut of @c rotate() and @c purge(). LOCK_log is acquired prior to rotate and is released after it. @@ -6683,16 +6788,24 @@ void MYSQL_BIN_LOG::checkpoint_and_purge(ulong binlog_id) @retval nonzero - error in rotating routine. */ -int MYSQL_BIN_LOG::rotate_and_purge(bool force_rotate) +int MYSQL_BIN_LOG::rotate_and_purge(bool force_rotate, + DYNAMIC_ARRAY *domain_drop_lex) { - int error= 0; + int err_gtid=0, error= 0; ulong prev_binlog_id; DBUG_ENTER("MYSQL_BIN_LOG::rotate_and_purge"); bool check_purge= false; mysql_mutex_lock(&LOCK_log); prev_binlog_id= current_binlog_id; - if ((error= rotate(force_rotate, &check_purge))) + + if ((err_gtid= do_delete_gtid_domain(domain_drop_lex))) + { + // inffective attempt to delete merely skips rotate and purge + if (err_gtid < 0) + error= 1; // otherwise error is propagated the user + } + else if ((error= rotate(force_rotate, &check_purge))) check_purge= false; /* NOTE: Run purge_logs wo/ holding LOCK_log because it does not need @@ -7096,8 +7209,15 @@ MYSQL_BIN_LOG::write_transaction_to_binlog(THD *thd, mode. Also, do not write the cached updates to binlog if binary logging is disabled (log-bin/sql_log_bin). */ - if (wsrep_emulate_bin_log || !(thd->variables.option_bits & OPTION_BIN_LOG)) + if (wsrep_emulate_bin_log) + { DBUG_RETURN(0); + } + else if (!(thd->variables.option_bits & OPTION_BIN_LOG)) + { + cache_mngr->need_unlog= false; + DBUG_RETURN(0); + } entry.thd= thd; entry.cache_mngr= cache_mngr; @@ -9398,11 +9518,19 @@ TC_LOG_BINLOG::log_and_order(THD *thd, my_xid xid, bool all, if (err) DBUG_RETURN(0); + + bool need_unlog= cache_mngr->need_unlog; + /* + The transaction won't need the flag anymore. + Todo/fixme: consider to move the statement into cache_mngr->reset() + relocated to the current or later point. + */ + cache_mngr->need_unlog= false; /* If using explicit user XA, we will not have XID. We must still return a non-zero cookie (as zero cookie signals error). */ - if (!xid || !cache_mngr->need_unlog) + if (!xid || !need_unlog) DBUG_RETURN(BINLOG_COOKIE_DUMMY(cache_mngr->delayed_error)); else DBUG_RETURN(BINLOG_COOKIE_MAKE(cache_mngr->binlog_id, @@ -9475,6 +9603,9 @@ TC_LOG_BINLOG::mark_xid_done(ulong binlog_id, bool write_checkpoint) if (b->binlog_id == binlog_id) { --b->xid_count; + + DBUG_ASSERT(b->xid_count >= 0); // catch unmatched (++) decrement + break; } first= false; @@ -10248,6 +10379,73 @@ TC_LOG_BINLOG::set_status_variables(THD *thd) } } + +/* + Find the Gtid_list_log_event at the start of a binlog. + + NULL for ok, non-NULL error message for error. + + If ok, then the event is returned in *out_gtid_list. This can be NULL if we + get back to binlogs written by old server version without GTID support. If + so, it means we have reached the point to start from, as no GTID events can + exist in earlier binlogs. +*/ +const char * +get_gtid_list_event(IO_CACHE *cache, Gtid_list_log_event **out_gtid_list) +{ + Format_description_log_event init_fdle(BINLOG_VERSION); + Format_description_log_event *fdle; + Log_event *ev; + const char *errormsg = NULL; + + *out_gtid_list= NULL; + + if (!(ev= Log_event::read_log_event(cache, 0, &init_fdle, + opt_master_verify_checksum)) || + ev->get_type_code() != FORMAT_DESCRIPTION_EVENT) + { + if (ev) + delete ev; + return "Could not read format description log event while looking for " + "GTID position in binlog"; + } + + fdle= static_cast<Format_description_log_event *>(ev); + + for (;;) + { + Log_event_type typ; + + ev= Log_event::read_log_event(cache, 0, fdle, opt_master_verify_checksum); + if (!ev) + { + errormsg= "Could not read GTID list event while looking for GTID " + "position in binlog"; + break; + } + typ= ev->get_type_code(); + if (typ == GTID_LIST_EVENT) + break; /* Done, found it */ + if (typ == START_ENCRYPTION_EVENT) + { + if (fdle->start_decryption((Start_encryption_log_event*) ev)) + errormsg= "Could not set up decryption for binlog."; + } + delete ev; + if (typ == ROTATE_EVENT || typ == STOP_EVENT || + typ == FORMAT_DESCRIPTION_EVENT || typ == START_ENCRYPTION_EVENT) + continue; /* Continue looking */ + + /* We did not find any Gtid_list_log_event, must be old binlog. */ + ev= NULL; + break; + } + + delete fdle; + *out_gtid_list= static_cast<Gtid_list_log_event *>(ev); + return errormsg; +} + struct st_mysql_storage_engine binlog_storage_engine= { MYSQL_HANDLERTON_INTERFACE_VERSION }; |