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/******************************************************
Percona XtraBackup: hot backup tool for InnoDB
(c) 2009-2014 Percona LLC and/or its affiliates
Originally Created 3/3/2009 Yasufumi Kinoshita
Written by Alexey Kopytov, Aleksandr Kuzminsky, Stewart Smith, Vadim Tkachenko,
Yasufumi Kinoshita, Ignacio Nin and Baron Schwartz.
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 Street, Fifth Floor, Boston, MA 02110-1335 USA
*******************************************************
This file incorporates work covered by the following copyright and
permission notice:
Copyright 2010 Codership Oy <http://www.codership.com>
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 Street, Fifth Floor, Boston, MA 02110-1335 USA
*******************************************************/
#include <my_global.h>
#include <my_base.h>
#include <handler.h>
#include <trx0rseg.h>
#include <mysql/service_wsrep.h>
#include "common.h"
#ifdef WITH_WSREP
#include <wsrep_api.h>
/*! Name of file where Galera info is stored on recovery */
#define MB_GALERA_INFO_FILENAME "mariadb_backup_galera_info"
#define XB_GALERA_DONOR_INFO_FILENAME "donor_galera_info"
/* backup copy of galera info file as sent by donor */
#define MB_GALERA_INFO_FILENAME_SST "mariadb_backup_galera_info_SST"
/***********************************************************************
Store Galera checkpoint info in the MB_GALERA_INFO_FILENAME file, if that
information is present in the trx system header. Otherwise, do nothing. */
void
xb_write_galera_info(bool incremental_prepare)
/*==================*/
{
FILE* fp;
XID xid;
char uuid_str[40];
long long seqno;
MY_STAT statinfo;
xid.null();
/* try to read last wsrep XID from innodb rsegs, we will use it
instead of galera info file received from donor
*/
if (!trx_rseg_read_wsrep_checkpoint(xid)) {
/* no worries yet, SST may have brought in galera info file
from some old MariaDB version, which does not support
wsrep XID storing in innodb rsegs
*/
return;
}
/* if SST brought in galera info file, copy it as *_SST file
this will not be used, saved just for future reference
*/
if (my_stat(MB_GALERA_INFO_FILENAME, &statinfo, MYF(0))) {
FILE* fp_in = fopen(MB_GALERA_INFO_FILENAME, "r");
FILE* fp_out = fopen(MB_GALERA_INFO_FILENAME_SST, "w");
char buf[BUFSIZ] = {'\0'};
size_t size;
while ((size = fread(buf, 1, BUFSIZ, fp_in))) {
if (fwrite(buf, 1, size, fp_out) != strlen(buf)) {
die(
"could not write to "
MB_GALERA_INFO_FILENAME_SST
", errno = %d\n",
errno);
}
}
if (!feof(fp_in)) {
die(
MB_GALERA_INFO_FILENAME_SST
" not fully copied\n"
);
}
fclose(fp_out);
fclose(fp_in);
}
wsrep_uuid_t uuid;
memcpy(uuid.data, wsrep_xid_uuid(&xid), sizeof(uuid.data));
if (wsrep_uuid_print(&uuid, uuid_str,
sizeof(uuid_str)) < 0) {
return;
}
fp = fopen(MB_GALERA_INFO_FILENAME, "w");
if (fp == NULL) {
die(
"could not create " MB_GALERA_INFO_FILENAME
", errno = %d\n",
errno);
}
seqno = wsrep_xid_seqno(&xid);
msg("mariabackup: Recovered WSREP position: %s:%lld domain_id: %lld\n",
uuid_str, (long long) seqno, (long long)wsrep_get_domain_id());
if (fprintf(fp, "%s:%lld %lld", uuid_str, (long long) seqno,
(long long)wsrep_get_domain_id()) < 0) {
die(
"could not write to " MB_GALERA_INFO_FILENAME
", errno = %d\n",
errno);;
}
fclose(fp);
}
#endif
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