1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/* Copyright 2015 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 02111-1301 USA
*/
//! @file some utility functions and classes not directly related to replication
#include "wsrep_xid.h"
#include "sql_class.h"
#include "wsrep_mysqld.h" // for logging macros
/*
* WSREPXid
*/
#define WSREP_XID_PREFIX "WSREPXid"
#define WSREP_XID_PREFIX_LEN MYSQL_XID_PREFIX_LEN
#define WSREP_XID_UUID_OFFSET 8
#define WSREP_XID_SEQNO_OFFSET (WSREP_XID_UUID_OFFSET + sizeof(wsrep_uuid_t))
#define WSREP_XID_GTRID_LEN (WSREP_XID_SEQNO_OFFSET + sizeof(wsrep_seqno_t))
void wsrep_xid_init(XID* xid, const wsrep_uuid_t& uuid, wsrep_seqno_t seqno)
{
xid->formatID= 1;
xid->gtrid_length= WSREP_XID_GTRID_LEN;
xid->bqual_length= 0;
memset(xid->data, 0, sizeof(xid->data));
memcpy(xid->data, WSREP_XID_PREFIX, WSREP_XID_PREFIX_LEN);
memcpy(xid->data + WSREP_XID_UUID_OFFSET, &uuid, sizeof(wsrep_uuid_t));
memcpy(xid->data + WSREP_XID_SEQNO_OFFSET, &seqno, sizeof(wsrep_seqno_t));
}
int wsrep_is_wsrep_xid(const XID* xid)
{
return (xid->formatID == 1 &&
xid->gtrid_length == WSREP_XID_GTRID_LEN &&
xid->bqual_length == 0 &&
!memcmp(xid->data, WSREP_XID_PREFIX, WSREP_XID_PREFIX_LEN));
}
const wsrep_uuid_t* wsrep_xid_uuid(const XID& xid)
{
if (wsrep_is_wsrep_xid(&xid))
return reinterpret_cast<const wsrep_uuid_t*>(xid.data
+ WSREP_XID_UUID_OFFSET);
else
return &WSREP_UUID_UNDEFINED;
}
wsrep_seqno_t wsrep_xid_seqno(const XID& xid)
{
if (wsrep_is_wsrep_xid(&xid))
{
wsrep_seqno_t seqno;
memcpy(&seqno, xid.data + WSREP_XID_SEQNO_OFFSET, sizeof(wsrep_seqno_t));
return seqno;
}
else
{
return WSREP_SEQNO_UNDEFINED;
}
}
static my_bool set_SE_checkpoint(THD* unused, plugin_ref plugin, void* arg)
{
XID* xid= static_cast<XID*>(arg);
handlerton* hton= plugin_data(plugin, handlerton *);
if (hton->set_checkpoint)
{
const wsrep_uuid_t* uuid(wsrep_xid_uuid(*xid));
char uuid_str[40] = {0, };
wsrep_uuid_print(uuid, uuid_str, sizeof(uuid_str));
WSREP_DEBUG("Set WSREPXid for InnoDB: %s:%lld",
uuid_str, (long long)wsrep_xid_seqno(*xid));
hton->set_checkpoint(hton, xid);
}
return FALSE;
}
void wsrep_set_SE_checkpoint(XID& xid)
{
plugin_foreach(NULL, set_SE_checkpoint, MYSQL_STORAGE_ENGINE_PLUGIN, &xid);
}
void wsrep_set_SE_checkpoint(const wsrep_uuid_t& uuid, wsrep_seqno_t seqno)
{
XID xid;
wsrep_xid_init(&xid, uuid, seqno);
wsrep_set_SE_checkpoint(xid);
}
static my_bool get_SE_checkpoint(THD* unused, plugin_ref plugin, void* arg)
{
XID* xid= reinterpret_cast<XID*>(arg);
handlerton* hton= plugin_data(plugin, handlerton *);
if (hton->get_checkpoint)
{
hton->get_checkpoint(hton, xid);
const wsrep_uuid_t* uuid(wsrep_xid_uuid(*xid));
char uuid_str[40] = {0, };
wsrep_uuid_print(uuid, uuid_str, sizeof(uuid_str));
WSREP_DEBUG("Read WSREPXid from InnoDB: %s:%lld",
uuid_str, (long long)wsrep_xid_seqno(*xid));
}
return FALSE;
}
void wsrep_get_SE_checkpoint(XID& xid)
{
plugin_foreach(NULL, get_SE_checkpoint, MYSQL_STORAGE_ENGINE_PLUGIN, &xid);
}
void wsrep_get_SE_checkpoint(wsrep_uuid_t& uuid, wsrep_seqno_t& seqno)
{
uuid= WSREP_UUID_UNDEFINED;
seqno= WSREP_SEQNO_UNDEFINED;
XID xid;
memset(&xid, 0, sizeof(xid));
xid.formatID= -1;
wsrep_get_SE_checkpoint(xid);
if (xid.formatID == -1) return; // nil XID
if (!wsrep_is_wsrep_xid(&xid))
{
WSREP_WARN("Read non-wsrep XID from storage engines.");
return;
}
uuid= *wsrep_xid_uuid(xid);
seqno= wsrep_xid_seqno(xid);
}
|
