diff options
Diffstat (limited to 'sql/slave.cc')
| -rw-r--r-- | sql/slave.cc | 160 |
1 files changed, 151 insertions, 9 deletions
diff --git a/sql/slave.cc b/sql/slave.cc index bbdfb8e633f..fe4a2f6ba0a 100644 --- a/sql/slave.cc +++ b/sql/slave.cc @@ -880,6 +880,95 @@ int init_floatvar_from_file(float* var, IO_CACHE* f, float default_val) DBUG_RETURN(1); } + +/** + A master info read method + + This function is called from @c init_master_info() along with + relatives to restore some of @c active_mi members. + Particularly, this function is responsible for restoring + IGNORE_SERVER_IDS list of servers whose events the slave is + going to ignore (to not log them in the relay log). + Items being read are supposed to be decimal output of values of a + type shorter or equal of @c long and separated by the single space. + + @param arr @c DYNAMIC_ARRAY pointer to storage for servers id + @param f @c IO_CACHE pointer to the source file + + @retval 0 All OK + @retval non-zero An error +*/ + +int init_dynarray_intvar_from_file(DYNAMIC_ARRAY* arr, IO_CACHE* f) +{ + int ret= 0; + char buf[16 * (sizeof(long)*4 + 1)]; // static buffer to use most of times + char *buf_act= buf; // actual buffer can be dynamic if static is short + char *token, *last; + uint num_items; // number of items of `arr' + size_t read_size; + DBUG_ENTER("init_dynarray_intvar_from_file"); + + if ((read_size= my_b_gets(f, buf_act, sizeof(buf))) == 0) + { + return 0; // no line in master.info + } + if (read_size + 1 == sizeof(buf) && buf[sizeof(buf) - 2] != '\n') + { + /* + short read happend; allocate sufficient memory and make the 2nd read + */ + char buf_work[(sizeof(long)*3 + 1)*16]; + memcpy(buf_work, buf, sizeof(buf_work)); + num_items= atoi(strtok_r(buf_work, " ", &last)); + size_t snd_size; + /* + max size lower bound approximate estimation bases on the formula: + (the items number + items themselves) * + (decimal size + space) - 1 + `\n' + '\0' + */ + size_t max_size= (1 + num_items) * (sizeof(long)*3 + 1) + 1; + buf_act= (char*) my_malloc(max_size, MYF(MY_WME)); + memcpy(buf_act, buf, read_size); + snd_size= my_b_gets(f, buf_act + read_size, max_size - read_size); + if (snd_size == 0 || + (snd_size + 1 == max_size - read_size) && buf[max_size - 2] != '\n') + { + /* + failure to make the 2nd read or short read again + */ + ret= 1; + goto err; + } + } + token= strtok_r(buf_act, " ", &last); + if (token == NULL) + { + ret= 1; + goto err; + } + num_items= atoi(token); + for (uint i=0; i < num_items; i++) + { + token= strtok_r(NULL, " ", &last); + if (token == NULL) + { + ret= 1; + goto err; + } + else + { + ulong val= atol(token); + insert_dynamic(arr, (uchar *) &val); + } + } +err: + if (buf_act != buf) + my_free(buf_act, MYF(0)); + DBUG_RETURN(ret); +} + + static bool check_io_slave_killed(THD *thd, Master_info *mi, const char *info) { if (io_slave_killed(thd, mi)) @@ -1058,7 +1147,7 @@ static int get_master_version_and_clock(MYSQL* mysql, Master_info* mi) (master_res= mysql_store_result(mysql)) && (master_row= mysql_fetch_row(master_res))) { - if ((::server_id == strtoul(master_row[1], 0, 10)) && + if ((::server_id == (mi->master_id= strtoul(master_row[1], 0, 10))) && !mi->rli.replicate_same_server_id) { errmsg= "The slave I/O thread stops because master and slave have equal \ @@ -1096,6 +1185,13 @@ maybe it is a *VERY OLD MASTER*."); mysql_free_result(master_res); master_res= NULL; } + if (mi->master_id == 0 && mi->ignore_server_ids.elements > 0) + { + errmsg= "Slave configured with server id filtering could not detect the master server id."; + err_code= ER_SLAVE_FATAL_ERROR; + sprintf(err_buff, ER(err_code), errmsg); + goto err; + } /* Check that the master's global character_set_server and ours are the same. @@ -1659,6 +1755,10 @@ bool show_master_info(THD* thd, Master_info* mi) field_list.push_back(new Item_empty_string("Last_IO_Error", 20)); field_list.push_back(new Item_return_int("Last_SQL_Errno", 4, MYSQL_TYPE_LONG)); field_list.push_back(new Item_empty_string("Last_SQL_Error", 20)); + field_list.push_back(new Item_empty_string("Replicate_Ignore_Server_Ids", + FN_REFLEN)); + field_list.push_back(new Item_return_int("Master_Server_Id", sizeof(ulong), + MYSQL_TYPE_LONG)); if (protocol->send_fields(&field_list, Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF)) @@ -1780,6 +1880,32 @@ bool show_master_info(THD* thd, Master_info* mi) protocol->store(mi->rli.last_error().number); // Last_SQL_Error protocol->store(mi->rli.last_error().message, &my_charset_bin); + // Replicate_Ignore_Server_Ids + { + char buff[FN_REFLEN]; + ulong i, cur_len; + for (i= 0, buff[0]= 0, cur_len= 0; + i < mi->ignore_server_ids.elements; i++) + { + ulong s_id, slen; + char sbuff[FN_REFLEN]; + get_dynamic(&mi->ignore_server_ids, (uchar*) &s_id, i); + slen= my_sprintf(sbuff, (sbuff, (i==0? "%lu" : ", %lu"), s_id)); + if (cur_len + slen + 4 > FN_REFLEN) + { + /* + break the loop whenever remained space could not fit + ellipses on the next cycle + */ + my_sprintf(buff + cur_len, (buff + cur_len, "...")); + break; + } + cur_len += my_sprintf(buff + cur_len, (buff + cur_len, "%s", sbuff)); + } + protocol->store(buff, &my_charset_bin); + } + // Master_Server_id + protocol->store((uint32) mi->master_id); pthread_mutex_unlock(&mi->rli.err_lock); pthread_mutex_unlock(&mi->err_lock); @@ -3599,6 +3725,7 @@ static int queue_event(Master_info* mi,const char* buf, ulong event_len) ulong inc_pos; Relay_log_info *rli= &mi->rli; pthread_mutex_t *log_lock= rli->relay_log.get_log_lock(); + ulong s_id; DBUG_ENTER("queue_event"); LINT_INIT(inc_pos); @@ -3745,9 +3872,20 @@ static int queue_event(Master_info* mi,const char* buf, ulong event_len) */ pthread_mutex_lock(log_lock); - - if ((uint4korr(buf + SERVER_ID_OFFSET) == ::server_id) && - !mi->rli.replicate_same_server_id) + s_id= uint4korr(buf + SERVER_ID_OFFSET); + if ((s_id == ::server_id && !mi->rli.replicate_same_server_id) || + /* + the following conjunction deals with IGNORE_SERVER_IDS, if set + If the master is on the ignore list, execution of + format description log events and rotate events is necessary. + */ + (mi->ignore_server_ids.elements > 0 && + mi->shall_ignore_server_id(s_id) && + /* everything is filtered out from non-master */ + (s_id != mi->master_id || + /* for the master meta information is necessary */ + buf[EVENT_TYPE_OFFSET] != FORMAT_DESCRIPTION_EVENT && + buf[EVENT_TYPE_OFFSET] != ROTATE_EVENT))) { /* Do not write it to the relay log. @@ -3762,10 +3900,14 @@ static int queue_event(Master_info* mi,const char* buf, ulong event_len) But events which were generated by this slave and which do not exist in the master's binlog (i.e. Format_desc, Rotate & Stop) should not increment mi->master_log_pos. + If the event is originated remotely and is being filtered out by + IGNORE_SERVER_IDS it increments mi->master_log_pos + as well as rli->group_relay_log_pos. */ - if (buf[EVENT_TYPE_OFFSET]!=FORMAT_DESCRIPTION_EVENT && - buf[EVENT_TYPE_OFFSET]!=ROTATE_EVENT && - buf[EVENT_TYPE_OFFSET]!=STOP_EVENT) + if (!(s_id == ::server_id && !mi->rli.replicate_same_server_id) || + buf[EVENT_TYPE_OFFSET] != FORMAT_DESCRIPTION_EVENT && + buf[EVENT_TYPE_OFFSET] != ROTATE_EVENT && + buf[EVENT_TYPE_OFFSET] != STOP_EVENT) { mi->master_log_pos+= inc_pos; memcpy(rli->ign_master_log_name_end, mi->master_log_name, FN_REFLEN); @@ -3773,8 +3915,8 @@ static int queue_event(Master_info* mi,const char* buf, ulong event_len) rli->ign_master_log_pos_end= mi->master_log_pos; } rli->relay_log.signal_update(); // the slave SQL thread needs to re-check - DBUG_PRINT("info", ("master_log_pos: %lu, event originating from the same server, ignored", - (ulong) mi->master_log_pos)); + DBUG_PRINT("info", ("master_log_pos: %lu, event originating from %u server, ignored", + (ulong) mi->master_log_pos, uint4korr(buf + SERVER_ID_OFFSET))); } else { |