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mydumper.c
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mydumper.c
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/*
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, either version 3 of the License, or
(at your option) any later version.
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, see <http://www.gnu.org/licenses/>.
Authors: Domas Mituzas, Facebook ( domas at fb dot com )
Mark Leith, Oracle Corporation (mark dot leith at oracle dot com)
Andrew Hutchings, SkySQL (andrew at skysql dot com)
Max Bubenick, Percona RDBA (max dot bubenick at percona dot com)
*/
#define _LARGEFILE64_SOURCE
#define _FILE_OFFSET_BITS 64
#include <mysql.h>
#if defined MARIADB_CLIENT_VERSION_STR && !defined MYSQL_SERVER_VERSION
#define MYSQL_SERVER_VERSION MARIADB_CLIENT_VERSION_STR
#endif
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <time.h>
#include <zlib.h>
#include <pcre.h>
#include <signal.h>
#include <glib/gstdio.h>
#include "config.h"
#ifdef WITH_BINLOG
#include "binlog.h"
#else
#include "mydumper.h"
#endif
#include "server_detect.h"
#include "connection.h"
#include "common.h"
#include "g_unix_signal.h"
#include <math.h>
#include "getPassword.h"
char *regexstring = NULL;
const char DIRECTORY[] = "export";
#ifdef WITH_BINLOG
const char BINLOG_DIRECTORY[] = "binlog_snapshot";
const char DAEMON_BINLOGS[] = "binlogs";
#endif
/* Some earlier versions of MySQL do not yet define MYSQL_TYPE_JSON */
#ifndef MYSQL_TYPE_JSON
#define MYSQL_TYPE_JSON 245
#endif
static GMutex *init_mutex = NULL;
/* Program options */
gchar *output_directory = NULL;
guint statement_size = 1000000;
guint rows_per_file = 0;
guint chunk_filesize = 0;
int longquery = 60;
int build_empty_files = 0;
int skip_tz = 0;
int need_dummy_read = 0;
int need_dummy_toku_read = 0;
int compress_output = 0;
int killqueries = 0;
int detected_server = 0;
int lock_all_tables = 0;
guint snapshot_interval = 60;
gboolean daemon_mode = FALSE;
gboolean have_snapshot_cloning = FALSE;
gchar *ignore_engines = NULL;
char **ignore = NULL;
gchar *tables_list = NULL;
gchar *tidb_snapshot = NULL;
GSequence *tables_skiplist = NULL;
gchar *tables_skiplist_file = NULL;
char **tables = NULL;
GList *no_updated_tables = NULL;
#ifdef WITH_BINLOG
gboolean need_binlogs = FALSE;
gchar *binlog_directory = NULL;
gchar *daemon_binlog_directory = NULL;
#endif
gchar *logfile = NULL;
FILE *logoutfile = NULL;
gboolean no_schemas = FALSE;
gboolean no_data = FALSE;
gboolean no_locks = FALSE;
gboolean dump_triggers = FALSE;
gboolean dump_events = FALSE;
gboolean dump_routines = FALSE;
gboolean no_dump_views = FALSE;
gboolean less_locking = FALSE;
gboolean use_savepoints = FALSE;
gboolean success_on_1146 = FALSE;
gboolean no_backup_locks = FALSE;
gboolean insert_ignore = FALSE;
GList *innodb_tables = NULL;
GMutex *innodb_tables_mutex = NULL;
GList *non_innodb_table = NULL;
GMutex *non_innodb_table_mutex = NULL;
GList *table_schemas = NULL;
GMutex *table_schemas_mutex = NULL;
GList *view_schemas = NULL;
GMutex *view_schemas_mutex = NULL;
GList *schema_post = NULL;
GMutex *schema_post_mutex = NULL;
gint database_counter = 0;
gint non_innodb_table_counter = 0;
gint non_innodb_done = 0;
guint less_locking_threads = 0;
guint updated_since = 0;
guint trx_consistency_only = 0;
guint complete_insert = 0;
// For daemon mode, 0 or 1
guint dump_number = 0;
guint binlog_connect_id = 0;
gboolean shutdown_triggered = FALSE;
GAsyncQueue *start_scheduled_dump;
GMainLoop *m1;
static GCond *ll_cond = NULL;
static GMutex *ll_mutex = NULL;
int errors;
static GOptionEntry entries[] = {
{"database", 'B', 0, G_OPTION_ARG_STRING, &db, "Database to dump", NULL},
{"tables-list", 'T', 0, G_OPTION_ARG_STRING, &tables_list,
"Comma delimited table list to dump (does not exclude regex option)",
NULL},
{"omit-from-file", 'O', 0, G_OPTION_ARG_STRING, &tables_skiplist_file,
"File containing a list of database.table entries to skip, one per line "
"(skips before applying regex option)",
NULL},
{"outputdir", 'o', 0, G_OPTION_ARG_FILENAME, &output_directory,
"Directory to output files to", NULL},
{"statement-size", 's', 0, G_OPTION_ARG_INT, &statement_size,
"Attempted size of INSERT statement in bytes, default 1000000", NULL},
{"rows", 'r', 0, G_OPTION_ARG_INT, &rows_per_file,
"Try to split tables into chunks of this many rows. This option turns off "
"--chunk-filesize",
NULL},
{"chunk-filesize", 'F', 0, G_OPTION_ARG_INT, &chunk_filesize,
"Split tables into chunks of this output file size. This value is in MB",
NULL},
{"compress", 'c', 0, G_OPTION_ARG_NONE, &compress_output,
"Compress output files", NULL},
{"build-empty-files", 'e', 0, G_OPTION_ARG_NONE, &build_empty_files,
"Build dump files even if no data available from table", NULL},
{"regex", 'x', 0, G_OPTION_ARG_STRING, ®exstring,
"Regular expression for 'db.table' matching", NULL},
{"ignore-engines", 'i', 0, G_OPTION_ARG_STRING, &ignore_engines,
"Comma delimited list of storage engines to ignore", NULL},
{"insert-ignore", 'N', 0, G_OPTION_ARG_NONE, &insert_ignore,
"Dump rows with INSERT IGNORE", NULL},
{"no-schemas", 'm', 0, G_OPTION_ARG_NONE, &no_schemas,
"Do not dump table schemas with the data", NULL},
{"no-data", 'd', 0, G_OPTION_ARG_NONE, &no_data, "Do not dump table data",
NULL},
{"triggers", 'G', 0, G_OPTION_ARG_NONE, &dump_triggers, "Dump triggers",
NULL},
{"events", 'E', 0, G_OPTION_ARG_NONE, &dump_events, "Dump events", NULL},
{"routines", 'R', 0, G_OPTION_ARG_NONE, &dump_routines,
"Dump stored procedures and functions", NULL},
{"no-views", 'W', 0, G_OPTION_ARG_NONE, &no_dump_views, "Do not dump VIEWs",
NULL},
{"no-locks", 'k', 0, G_OPTION_ARG_NONE, &no_locks,
"Do not execute the temporary shared read lock. WARNING: This will cause "
"inconsistent backups",
NULL},
{"no-backup-locks", 0, 0, G_OPTION_ARG_NONE, &no_backup_locks,
"Do not use Percona backup locks", NULL},
{"less-locking", 0, 0, G_OPTION_ARG_NONE, &less_locking,
"Minimize locking time on InnoDB tables.", NULL},
{"long-query-guard", 'l', 0, G_OPTION_ARG_INT, &longquery,
"Set long query timer in seconds, default 60", NULL},
{"kill-long-queries", 'K', 0, G_OPTION_ARG_NONE, &killqueries,
"Kill long running queries (instead of aborting)", NULL},
#ifdef WITH_BINLOG
{"binlogs", 'b', 0, G_OPTION_ARG_NONE, &need_binlogs,
"Get a snapshot of the binary logs as well as dump data", NULL},
#endif
{"daemon", 'D', 0, G_OPTION_ARG_NONE, &daemon_mode, "Enable daemon mode",
NULL},
{"snapshot-interval", 'I', 0, G_OPTION_ARG_INT, &snapshot_interval,
"Interval between each dump snapshot (in minutes), requires --daemon, "
"default 60",
NULL},
{"logfile", 'L', 0, G_OPTION_ARG_FILENAME, &logfile,
"Log file name to use, by default stdout is used", NULL},
{"tz-utc", 0, G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &skip_tz,
"SET TIME_ZONE='+00:00' at top of dump to allow dumping of TIMESTAMP data "
"when a server has data in different time zones or data is being moved "
"between servers with different time zones, defaults to on use "
"--skip-tz-utc to disable.",
NULL},
{"skip-tz-utc", 0, 0, G_OPTION_ARG_NONE, &skip_tz, "", NULL},
{"use-savepoints", 0, 0, G_OPTION_ARG_NONE, &use_savepoints,
"Use savepoints to reduce metadata locking issues, needs SUPER privilege",
NULL},
{"success-on-1146", 0, 0, G_OPTION_ARG_NONE, &success_on_1146,
"Not increment error count and Warning instead of Critical in case of "
"table doesn't exist",
NULL},
{"lock-all-tables", 0, 0, G_OPTION_ARG_NONE, &lock_all_tables,
"Use LOCK TABLE for all, instead of FTWRL", NULL},
{"updated-since", 'U', 0, G_OPTION_ARG_INT, &updated_since,
"Use Update_time to dump only tables updated in the last U days", NULL},
{"trx-consistency-only", 0, 0, G_OPTION_ARG_NONE, &trx_consistency_only,
"Transactional consistency only", NULL},
{"complete-insert", 0, 0, G_OPTION_ARG_NONE, &complete_insert,
"Use complete INSERT statements that include column names", NULL},
{"tidb-snapshot", 'z', 0, G_OPTION_ARG_STRING, &tidb_snapshot,
"Snapshot to use for TiDB", NULL},
{NULL, 0, 0, G_OPTION_ARG_NONE, NULL, NULL, NULL}};
struct tm tval;
void dump_schema_data(MYSQL *conn, char *database, char *table, char *filename);
void dump_triggers_data(MYSQL *conn, char *database, char *table,
char *filename);
void dump_view_data(MYSQL *conn, char *database, char *table, char *filename,
char *filename2);
void dump_schema(MYSQL *conn, char *database, char *table,
struct configuration *conf);
void dump_view(char *database, char *table, struct configuration *conf);
void dump_table(MYSQL *conn, char *database, char *table,
struct configuration *conf, gboolean is_innodb);
void dump_tables(MYSQL *, GList *, struct configuration *);
void dump_schema_post(char *database, struct configuration *conf);
void restore_charset(GString *statement);
void set_charset(GString *statement, char *character_set,
char *collation_connection);
void dump_schema_post_data(MYSQL *conn, char *database, char *filename);
guint64 dump_table_data(MYSQL *, FILE *, char *, char *, char *, char *);
void dump_database(char *, struct configuration *);
void dump_database_thread(MYSQL *, char *);
void dump_create_database(char *, struct configuration *);
void dump_create_database_data(MYSQL *, char *, char *);
void get_tables(MYSQL *conn, struct configuration *);
void get_not_updated(MYSQL *conn, FILE *);
GList *get_chunks_for_table(MYSQL *, char *, char *,
struct configuration *conf);
guint64 estimate_count(MYSQL *conn, char *database, char *table, char *field,
char *from, char *to);
void dump_table_data_file(MYSQL *conn, char *database, char *table, char *where,
char *filename);
void create_backup_dir(char *directory);
gboolean write_data(FILE *, GString *);
gboolean check_regex(char *database, char *table);
gboolean check_skiplist(char *database, char *table);
int tables_skiplist_cmp(gconstpointer a, gconstpointer b, gpointer user_data);
void read_tables_skiplist(const gchar *filename);
void no_log(const gchar *log_domain, GLogLevelFlags log_level,
const gchar *message, gpointer user_data);
void set_verbose(guint verbosity);
#ifdef WITH_BINLOG
MYSQL *reconnect_for_binlog(MYSQL *thrconn);
void *binlog_thread(void *data);
#endif
void start_dump(MYSQL *conn);
MYSQL *create_main_connection();
void *exec_thread(void *data);
void write_log_file(const gchar *log_domain, GLogLevelFlags log_level,
const gchar *message, gpointer user_data);
void no_log(const gchar *log_domain, GLogLevelFlags log_level,
const gchar *message, gpointer user_data) {
(void)log_domain;
(void)log_level;
(void)message;
(void)user_data;
}
void set_verbose(guint verbosity) {
if (logfile) {
logoutfile = g_fopen(logfile, "w");
if (!logoutfile) {
g_critical("Could not open log file '%s' for writing: %d", logfile,
errno);
exit(EXIT_FAILURE);
}
}
switch (verbosity) {
case 0:
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_MASK), no_log, NULL);
break;
case 1:
g_log_set_handler(
NULL, (GLogLevelFlags)(G_LOG_LEVEL_WARNING | G_LOG_LEVEL_MESSAGE),
no_log, NULL);
if (logfile)
g_log_set_handler(
NULL, (GLogLevelFlags)(G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL),
write_log_file, NULL);
break;
case 2:
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_MESSAGE), no_log,
NULL);
if (logfile)
g_log_set_handler(
NULL,
(GLogLevelFlags)(G_LOG_LEVEL_WARNING | G_LOG_LEVEL_ERROR |
G_LOG_LEVEL_WARNING | G_LOG_LEVEL_ERROR |
G_LOG_LEVEL_CRITICAL),
write_log_file, NULL);
break;
default:
if (logfile)
g_log_set_handler(NULL, (GLogLevelFlags)(G_LOG_LEVEL_MASK),
write_log_file, NULL);
break;
}
}
gboolean sig_triggered(gpointer user_data) {
(void)user_data;
g_message("Shutting down gracefully");
shutdown_triggered = TRUE;
g_main_loop_quit(m1);
return FALSE;
}
void clear_dump_directory() {
GError *error = NULL;
char *dump_directory =
g_strdup_printf("%s/%d", output_directory, dump_number);
GDir *dir = g_dir_open(dump_directory, 0, &error);
if (error) {
g_critical("cannot open directory %s, %s\n", dump_directory,
error->message);
errors++;
return;
}
const gchar *filename = NULL;
while ((filename = g_dir_read_name(dir))) {
gchar *path = g_build_filename(dump_directory, filename, NULL);
if (g_unlink(path) == -1) {
g_critical("error removing file %s (%d)\n", path, errno);
errors++;
return;
}
g_free(path);
}
g_dir_close(dir);
g_free(dump_directory);
}
gboolean run_snapshot(gpointer *data) {
(void)data;
g_async_queue_push(start_scheduled_dump, GINT_TO_POINTER(1));
return (shutdown_triggered) ? FALSE : TRUE;
}
/* Check database.table string against regular expression */
gboolean check_regex(char *database, char *table) {
/* This is not going to be used in threads */
static pcre *re = NULL;
int rc;
int ovector[9] = {0};
const char *error;
int erroroffset;
char *p;
/* Let's compile the RE before we do anything */
if (!re) {
re = pcre_compile(regexstring, PCRE_CASELESS | PCRE_MULTILINE, &error,
&erroroffset, NULL);
if (!re) {
g_critical("Regular expression fail: %s", error);
exit(EXIT_FAILURE);
}
}
p = g_strdup_printf("%s.%s", database, table);
rc = pcre_exec(re, NULL, p, strlen(p), 0, 0, ovector, 9);
g_free(p);
return (rc > 0) ? TRUE : FALSE;
}
/* Check database.table string against skip list; returns TRUE if found */
gboolean check_skiplist(char *database, char *table) {
if (g_sequence_lookup(tables_skiplist,
g_strdup_printf("%s.%s", database, table),
tables_skiplist_cmp, NULL)) {
return TRUE;
} else {
return FALSE;
};
}
/* Comparison function for skiplist sort and lookup */
int tables_skiplist_cmp(gconstpointer a, gconstpointer b, gpointer user_data) {
/* Not using user_data, but needed for function prototype, shutting up
* compiler warnings about unused variable */
(void)user_data;
/* Any sorting function would work, as long as its usage is consistent
* between sort and lookup. strcmp should be one of the fastest. */
return strcmp(a, b);
}
/* Read the list of tables to skip from the given filename, and prepares them
* for future lookups. */
void read_tables_skiplist(const gchar *filename) {
GIOChannel *tables_skiplist_channel = NULL;
gchar *buf = NULL;
GError *error = NULL;
/* Create skiplist if it does not exist */
if (!tables_skiplist) {
tables_skiplist = g_sequence_new(NULL);
};
tables_skiplist_channel = g_io_channel_new_file(filename, "r", &error);
/* Error opening/reading the file? bail out. */
if (!tables_skiplist_channel) {
g_critical("cannot read/open file %s, %s\n", filename, error->message);
errors++;
return;
};
/* Read lines, push them to the list */
do {
g_io_channel_read_line(tables_skiplist_channel, &buf, NULL, NULL, NULL);
if (buf) {
g_strchomp(buf);
g_sequence_append(tables_skiplist, buf);
};
} while (buf);
g_io_channel_shutdown(tables_skiplist_channel, FALSE, NULL);
/* Sort the list, so that lookups work */
g_sequence_sort(tables_skiplist, tables_skiplist_cmp, NULL);
g_message("Omit list file contains %d tables to skip\n",
g_sequence_get_length(tables_skiplist));
return;
}
/* Write some stuff we know about snapshot, before it changes */
void write_snapshot_info(MYSQL *conn, FILE *file) {
MYSQL_RES *master = NULL, *slave = NULL, *mdb = NULL;
MYSQL_FIELD *fields;
MYSQL_ROW row;
char *masterlog = NULL;
char *masterpos = NULL;
char *mastergtid = NULL;
char *connname = NULL;
char *slavehost = NULL;
char *slavelog = NULL;
char *slavepos = NULL;
char *slavegtid = NULL;
guint isms;
guint i;
mysql_query(conn, "SHOW MASTER STATUS");
master = mysql_store_result(conn);
if (master && (row = mysql_fetch_row(master))) {
masterlog = row[0];
masterpos = row[1];
/* Oracle/Percona GTID */
if (mysql_num_fields(master) == 5) {
mastergtid = row[4];
} else {
/* Let's try with MariaDB 10.x */
/* Use gtid_binlog_pos due to issue with gtid_current_pos with galera
* cluster, gtid_binlog_pos works as well with normal mariadb server
* https://jira.mariadb.org/browse/MDEV-10279 */
mysql_query(conn, "SELECT @@gtid_binlog_pos");
mdb = mysql_store_result(conn);
if (mdb && (row = mysql_fetch_row(mdb))) {
mastergtid = row[0];
}
}
}
if (masterlog) {
fprintf(file, "SHOW MASTER STATUS:\n\tLog: %s\n\tPos: %s\n\tGTID:%s\n\n",
masterlog, masterpos, mastergtid);
g_message("Written master status");
}
isms = 0;
mysql_query(conn, "SELECT @@default_master_connection");
MYSQL_RES *rest = mysql_store_result(conn);
if (rest != NULL && mysql_num_rows(rest)) {
mysql_free_result(rest);
g_message("Multisource slave detected.");
isms = 1;
}
if (isms)
mysql_query(conn, "SHOW ALL SLAVES STATUS");
else
mysql_query(conn, "SHOW SLAVE STATUS");
slave = mysql_store_result(conn);
while (slave && (row = mysql_fetch_row(slave))) {
fields = mysql_fetch_fields(slave);
for (i = 0; i < mysql_num_fields(slave); i++) {
if (isms && !strcasecmp("connection_name", fields[i].name))
connname = row[i];
if (!strcasecmp("exec_master_log_pos", fields[i].name)) {
slavepos = row[i];
} else if (!strcasecmp("relay_master_log_file", fields[i].name)) {
slavelog = row[i];
} else if (!strcasecmp("master_host", fields[i].name)) {
slavehost = row[i];
} else if (!strcasecmp("Executed_Gtid_Set", fields[i].name) ||
!strcasecmp("Gtid_Slave_Pos", fields[i].name)) {
slavegtid = row[i];
}
}
if (slavehost) {
fprintf(file, "SHOW SLAVE STATUS:");
if (isms)
fprintf(file, "\n\tConnection name: %s", connname);
fprintf(file, "\n\tHost: %s\n\tLog: %s\n\tPos: %s\n\tGTID:%s\n\n",
slavehost, slavelog, slavepos, slavegtid);
g_message("Written slave status");
}
}
fflush(file);
if (master)
mysql_free_result(master);
if (slave)
mysql_free_result(slave);
if (mdb)
mysql_free_result(mdb);
}
void *process_queue(struct thread_data *td) {
struct configuration *conf = td->conf;
// mysql_init is not thread safe, especially in Connector/C
g_mutex_lock(init_mutex);
MYSQL *thrconn = mysql_init(NULL);
g_mutex_unlock(init_mutex);
configure_connection(thrconn, "mydumper");
if (!mysql_real_connect(thrconn, hostname, username, password, NULL, port,
socket_path, 0)) {
g_critical("Failed to connect to database: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
} else {
g_message("Thread %d connected using MySQL connection ID %lu",
td->thread_id, mysql_thread_id(thrconn));
}
if (use_savepoints && mysql_query(thrconn, "SET SQL_LOG_BIN = 0")) {
g_critical("Failed to disable binlog for the thread: %s",
mysql_error(thrconn));
exit(EXIT_FAILURE);
}
if ((detected_server == SERVER_TYPE_MYSQL) &&
mysql_query(thrconn, "SET SESSION wait_timeout = 2147483")) {
g_warning("Failed to increase wait_timeout: %s", mysql_error(thrconn));
}
if (mysql_query(thrconn,
"SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ")) {
g_critical("Failed to set isolation level: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
}
if (mysql_query(thrconn,
"START TRANSACTION /*!40108 WITH CONSISTENT SNAPSHOT */")) {
g_critical("Failed to start consistent snapshot: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
}
if (!skip_tz && mysql_query(thrconn, "/*!40103 SET TIME_ZONE='+00:00' */")) {
g_critical("Failed to set time zone: %s", mysql_error(thrconn));
}
if (detected_server == SERVER_TYPE_TIDB) {
// Worker threads must set their tidb_snapshot in order to be safe
// Because no locking has been used.
gchar *query =
g_strdup_printf("SET SESSION tidb_snapshot = '%s'", tidb_snapshot);
if (mysql_query(thrconn, query)) {
g_critical("Failed to set tidb_snapshot: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
}
g_free(query);
g_message("Thread %d set to tidb_snapshot '%s'", td->thread_id,
tidb_snapshot);
}
/* Unfortunately version before 4.1.8 did not support consistent snapshot
* transaction starts, so we cheat */
if (need_dummy_read) {
mysql_query(thrconn,
"SELECT /*!40001 SQL_NO_CACHE */ * FROM mysql.mydumperdummy");
MYSQL_RES *res = mysql_store_result(thrconn);
if (res)
mysql_free_result(res);
}
if (need_dummy_toku_read) {
mysql_query(thrconn,
"SELECT /*!40001 SQL_NO_CACHE */ * FROM mysql.tokudbdummy");
MYSQL_RES *res = mysql_store_result(thrconn);
if (res)
mysql_free_result(res);
}
mysql_query(thrconn, "/*!40101 SET NAMES binary*/");
g_async_queue_push(conf->ready, GINT_TO_POINTER(1));
struct job *job = NULL;
struct table_job *tj = NULL;
struct dump_database_job *ddj = NULL;
struct create_database_job *cdj = NULL;
struct schema_job *sj = NULL;
struct view_job *vj = NULL;
struct schema_post_job *sp = NULL;
#ifdef WITH_BINLOG
struct binlog_job *bj = NULL;
#endif
/* if less locking we need to wait until that threads finish
progressively waking up these threads */
if (less_locking) {
g_mutex_lock(ll_mutex);
while (less_locking_threads >= td->thread_id) {
g_cond_wait(ll_cond, ll_mutex);
}
g_mutex_unlock(ll_mutex);
}
for (;;) {
GTimeVal tv;
g_get_current_time(&tv);
g_time_val_add(&tv, 1000 * 1000 * 1);
job = (struct job *)g_async_queue_pop(conf->queue);
if (shutdown_triggered && (job->type != JOB_SHUTDOWN)) {
continue;
}
switch (job->type) {
case JOB_DUMP:
tj = (struct table_job *)job->job_data;
if (tj->where)
g_message("Thread %d dumping data for `%s`.`%s` where %s",
td->thread_id, tj->database, tj->table, tj->where);
else
g_message("Thread %d dumping data for `%s`.`%s`", td->thread_id,
tj->database, tj->table);
if (use_savepoints && mysql_query(thrconn, "SAVEPOINT mydumper")) {
g_critical("Savepoint failed: %s", mysql_error(thrconn));
}
dump_table_data_file(thrconn, tj->database, tj->table, tj->where,
tj->filename);
if (use_savepoints &&
mysql_query(thrconn, "ROLLBACK TO SAVEPOINT mydumper")) {
g_critical("Rollback to savepoint failed: %s", mysql_error(thrconn));
}
if (tj->database)
g_free(tj->database);
if (tj->table)
g_free(tj->table);
if (tj->where)
g_free(tj->where);
if (tj->filename)
g_free(tj->filename);
g_free(tj);
g_free(job);
break;
case JOB_DUMP_NON_INNODB:
tj = (struct table_job *)job->job_data;
if (tj->where)
g_message("Thread %d dumping data for `%s`.`%s` where %s",
td->thread_id, tj->database, tj->table, tj->where);
else
g_message("Thread %d dumping data for `%s`.`%s`", td->thread_id,
tj->database, tj->table);
if (use_savepoints && mysql_query(thrconn, "SAVEPOINT mydumper")) {
g_critical("Savepoint failed: %s", mysql_error(thrconn));
}
dump_table_data_file(thrconn, tj->database, tj->table, tj->where,
tj->filename);
if (use_savepoints &&
mysql_query(thrconn, "ROLLBACK TO SAVEPOINT mydumper")) {
g_critical("Rollback to savepoint failed: %s", mysql_error(thrconn));
}
if (tj->database)
g_free(tj->database);
if (tj->table)
g_free(tj->table);
if (tj->where)
g_free(tj->where);
if (tj->filename)
g_free(tj->filename);
g_free(tj);
g_free(job);
if (g_atomic_int_dec_and_test(&non_innodb_table_counter) &&
g_atomic_int_get(&non_innodb_done)) {
g_async_queue_push(conf->unlock_tables, GINT_TO_POINTER(1));
}
break;
case JOB_DUMP_DATABASE:
ddj = (struct dump_database_job *)job->job_data;
g_message("Thread %d dumping db information for `%s`", td->thread_id,
ddj->database);
dump_database_thread(thrconn, ddj->database);
if (ddj->database)
g_free(ddj->database);
g_free(ddj);
g_free(job);
if (g_atomic_int_dec_and_test(&database_counter)) {
g_async_queue_push(conf->ready_database_dump, GINT_TO_POINTER(1));
}
break;
case JOB_CREATE_DATABASE:
cdj = (struct create_database_job *)job->job_data;
g_message("Thread %d dumping schema create for `%s`", td->thread_id,
cdj->database);
dump_create_database_data(thrconn, cdj->database, cdj->filename);
if (cdj->database)
g_free(cdj->database);
if (cdj->filename)
g_free(cdj->filename);
g_free(cdj);
g_free(job);
break;
case JOB_SCHEMA:
sj = (struct schema_job *)job->job_data;
g_message("Thread %d dumping schema for `%s`.`%s`", td->thread_id,
sj->database, sj->table);
dump_schema_data(thrconn, sj->database, sj->table, sj->filename);
if (sj->database)
g_free(sj->database);
if (sj->table)
g_free(sj->table);
if (sj->filename)
g_free(sj->filename);
g_free(sj);
g_free(job);
break;
case JOB_VIEW:
vj = (struct view_job *)job->job_data;
g_message("Thread %d dumping view for `%s`.`%s`", td->thread_id,
vj->database, vj->table);
dump_view_data(thrconn, vj->database, vj->table, vj->filename,
vj->filename2);
if (vj->database)
g_free(vj->database);
if (vj->table)
g_free(vj->table);
if (vj->filename)
g_free(vj->filename);
if (vj->filename2)
g_free(vj->filename2);
g_free(vj);
g_free(job);
break;
case JOB_TRIGGERS:
sj = (struct schema_job *)job->job_data;
g_message("Thread %d dumping triggers for `%s`.`%s`", td->thread_id,
sj->database, sj->table);
dump_triggers_data(thrconn, sj->database, sj->table, sj->filename);
if (sj->database)
g_free(sj->database);
if (sj->table)
g_free(sj->table);
if (sj->filename)
g_free(sj->filename);
g_free(sj);
g_free(job);
break;
case JOB_SCHEMA_POST:
sp = (struct schema_post_job *)job->job_data;
g_message("Thread %d dumping SP and VIEWs for `%s`", td->thread_id,
sp->database);
dump_schema_post_data(thrconn, sp->database, sp->filename);
if (sp->database)
g_free(sp->database);
if (sp->filename)
g_free(sp->filename);
g_free(sp);
g_free(job);
break;
#ifdef WITH_BINLOG
case JOB_BINLOG:
thrconn = reconnect_for_binlog(thrconn);
g_message(
"Thread %d connected using MySQL connection ID %lu (in binlog mode)",
td->thread_id, mysql_thread_id(thrconn));
bj = (struct binlog_job *)job->job_data;
g_message("Thread %d dumping binary log file %s", td->thread_id,
bj->filename);
get_binlog_file(thrconn, bj->filename, binlog_directory,
bj->start_position, bj->stop_position, FALSE);
if (bj->filename)
g_free(bj->filename);
g_free(bj);
g_free(job);
break;
#endif
case JOB_SHUTDOWN:
g_message("Thread %d shutting down", td->thread_id);
if (thrconn)
mysql_close(thrconn);
g_free(job);
mysql_thread_end();
return NULL;
break;
default:
g_critical("Something very bad happened!");
exit(EXIT_FAILURE);
}
}
if (thrconn)
mysql_close(thrconn);
mysql_thread_end();
return NULL;
}
void *process_queue_less_locking(struct thread_data *td) {
struct configuration *conf = td->conf;
// mysql_init is not thread safe, especially in Connector/C
g_mutex_lock(init_mutex);
MYSQL *thrconn = mysql_init(NULL);
g_mutex_unlock(init_mutex);
configure_connection(thrconn, "mydumper");
if (!mysql_real_connect(thrconn, hostname, username, password, NULL, port,
socket_path, 0)) {
g_critical("Failed to connect to database: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
} else {
g_message("Thread %d connected using MySQL connection ID %lu",
td->thread_id, mysql_thread_id(thrconn));
}
if ((detected_server == SERVER_TYPE_MYSQL) &&
mysql_query(thrconn, "SET SESSION wait_timeout = 2147483")) {
g_warning("Failed to increase wait_timeout: %s", mysql_error(thrconn));
}
if (!skip_tz && mysql_query(thrconn, "/*!40103 SET TIME_ZONE='+00:00' */")) {
g_critical("Failed to set time zone: %s", mysql_error(thrconn));
}
mysql_query(thrconn, "/*!40101 SET NAMES binary*/");
g_async_queue_push(conf->ready_less_locking, GINT_TO_POINTER(1));
struct job *job = NULL;
struct table_job *tj = NULL;
struct tables_job *mj = NULL;
struct dump_database_job *ddj = NULL;
struct create_database_job *cdj = NULL;
struct schema_job *sj = NULL;
struct view_job *vj = NULL;
struct schema_post_job *sp = NULL;
#ifdef WITH_BINLOG
struct binlog_job *bj = NULL;
#endif
GList *glj;
int first = 1;
GString *query = g_string_new(NULL);
GString *prev_table = g_string_new(NULL);
GString *prev_database = g_string_new(NULL);
for (;;) {
GTimeVal tv;
g_get_current_time(&tv);
g_time_val_add(&tv, 1000 * 1000 * 1);
job = (struct job *)g_async_queue_pop(conf->queue_less_locking);
if (shutdown_triggered && (job->type != JOB_SHUTDOWN)) {
continue;
}
switch (job->type) {
case JOB_LOCK_DUMP_NON_INNODB:
mj = (struct tables_job *)job->job_data;
for (glj = mj->table_job_list; glj != NULL; glj = glj->next) {
tj = (struct table_job *)glj->data;
if (first) {
g_string_printf(query, "LOCK TABLES `%s`.`%s` READ LOCAL",
tj->database, tj->table);
first = 0;
} else {
if (g_ascii_strcasecmp(prev_database->str, tj->database) ||
g_ascii_strcasecmp(prev_table->str, tj->table)) {
g_string_append_printf(query, ", `%s`.`%s` READ LOCAL",
tj->database, tj->table);
}
}
g_string_printf(prev_table, "%s", tj->table);
g_string_printf(prev_database, "%s", tj->database);
}
first = 1;
if (mysql_query(thrconn, query->str)) {
g_critical("Non Innodb lock tables fail: %s", mysql_error(thrconn));
exit(EXIT_FAILURE);
}
if (g_atomic_int_dec_and_test(&non_innodb_table_counter) &&
g_atomic_int_get(&non_innodb_done)) {
g_async_queue_push(conf->unlock_tables, GINT_TO_POINTER(1));
}
for (glj = mj->table_job_list; glj != NULL; glj = glj->next) {
tj = (struct table_job *)glj->data;
if (tj->where)
g_message("Thread %d dumping data for `%s`.`%s` where %s",
td->thread_id, tj->database, tj->table, tj->where);
else
g_message("Thread %d dumping data for `%s`.`%s`", td->thread_id,
tj->database, tj->table);
dump_table_data_file(thrconn, tj->database, tj->table, tj->where,
tj->filename);
if (tj->database)
g_free(tj->database);
if (tj->table)
g_free(tj->table);
if (tj->where)
g_free(tj->where);
if (tj->filename)
g_free(tj->filename);
g_free(tj);
}
mysql_query(thrconn, "UNLOCK TABLES /* Non Innodb */");
g_list_free(mj->table_job_list);
g_free(mj);
g_free(job);
break;
case JOB_DUMP_DATABASE:
ddj = (struct dump_database_job *)job->job_data;
g_message("Thread %d dumping db information for `%s`", td->thread_id,
ddj->database);
dump_database_thread(thrconn, ddj->database);
if (ddj->database)
g_free(ddj->database);
g_free(ddj);
g_free(job);
if (g_atomic_int_dec_and_test(&database_counter)) {
g_async_queue_push(conf->ready_database_dump, GINT_TO_POINTER(1));
}
break;
case JOB_CREATE_DATABASE:
cdj = (struct create_database_job *)job->job_data;
g_message("Thread %d dumping schema create for `%s`", td->thread_id,
cdj->database);
dump_create_database_data(thrconn, cdj->database, cdj->filename);
if (cdj->database)
g_free(cdj->database);
if (cdj->filename)
g_free(cdj->filename);
g_free(cdj);
g_free(job);
break;
case JOB_SCHEMA:
sj = (struct schema_job *)job->job_data;
g_message("Thread %d dumping schema for `%s`.`%s`", td->thread_id,
sj->database, sj->table);
dump_schema_data(thrconn, sj->database, sj->table, sj->filename);
if (sj->database)
g_free(sj->database);
if (sj->table)
g_free(sj->table);