1 /******************************************************
2 Percona XtraBackup: hot backup tool for InnoDB
3 (c) 2009-2014 Percona LLC and/or its affiliates
4 Originally Created 3/3/2009 Yasufumi Kinoshita
5 Written by Alexey Kopytov, Aleksandr Kuzminsky, Stewart Smith, Vadim Tkachenko,
6 Yasufumi Kinoshita, Ignacio Nin and Baron Schwartz.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; version 2 of the License.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
20
21 *******************************************************
22
23 This file incorporates work covered by the following copyright and
24 permission notice:
25
26 Copyright 2010 Codership Oy <http://www.codership.com>
27
28 This program is free software; you can redistribute it and/or modify
29 it under the terms of the GNU General Public License as published by
30 the Free Software Foundation; version 2 of the License.
31
32 This program is distributed in the hope that it will be useful,
33 but WITHOUT ANY WARRANTY; without even the implied warranty of
34 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
35 GNU General Public License for more details.
36
37 You should have received a copy of the GNU General Public License
38 along with this program; if not, write to the Free Software
39 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
40
41 *******************************************************/
42
43 #include <my_global.h>
44 #include <my_base.h>
45 #include <handler.h>
46 #include <trx0rseg.h>
47 #include <mysql/service_wsrep.h>
48
49 #include "common.h"
50 #ifdef WITH_WSREP
51
52 #include <wsrep_api.h>
53
54 /*! Name of file where Galera info is stored on recovery */
55 #define XB_GALERA_INFO_FILENAME "xtrabackup_galera_info"
56
57 /***********************************************************************
58 Store Galera checkpoint info in the 'xtrabackup_galera_info' file, if that
59 information is present in the trx system header. Otherwise, do nothing. */
60 void
xb_write_galera_info(bool incremental_prepare)61 xb_write_galera_info(bool incremental_prepare)
62 /*==================*/
63 {
64 FILE* fp;
65 XID xid;
66 char uuid_str[40];
67 long long seqno;
68 MY_STAT statinfo;
69
70 /* Do not overwrite existing an existing file to be compatible with
71 servers with older server versions */
72 if (!incremental_prepare &&
73 my_stat(XB_GALERA_INFO_FILENAME, &statinfo, MYF(0)) != NULL) {
74
75 return;
76 }
77
78 xid.null();
79
80 if (!trx_rseg_read_wsrep_checkpoint(xid)) {
81
82 return;
83 }
84
85 wsrep_uuid_t uuid;
86 memcpy(uuid.data, wsrep_xid_uuid(&xid), sizeof(uuid.data));
87 if (wsrep_uuid_print(&uuid, uuid_str,
88 sizeof(uuid_str)) < 0) {
89 return;
90 }
91
92 fp = fopen(XB_GALERA_INFO_FILENAME, "w");
93 if (fp == NULL) {
94
95 die(
96 "could not create " XB_GALERA_INFO_FILENAME
97 ", errno = %d\n",
98 errno);
99 exit(EXIT_FAILURE);
100 }
101
102 seqno = wsrep_xid_seqno(&xid);
103
104 msg("mariabackup: Recovered WSREP position: %s:%lld\n",
105 uuid_str, (long long) seqno);
106
107 if (fprintf(fp, "%s:%lld", uuid_str, (long long) seqno) < 0) {
108
109 die(
110 "could not write to " XB_GALERA_INFO_FILENAME
111 ", errno = %d\n",
112 errno);;
113 }
114
115 fclose(fp);
116 }
117 #endif
118