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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/* Copyright 2018 Codership Oy <info@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 St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "my_global.h"
#include "wsrep_storage_service.h"
#include "wsrep_trans_observer.h" /* wsrep_open() */
#include "wsrep_schema.h"
#include "wsrep_binlog.h"
#include "sql_class.h"
#include "mysqld.h" /* next_query_id() */
#include "slave.h" /* opt_log_slave_updates() */
#include "transaction.h" /* trans_commit(), trans_rollback() */
/*
Temporarily enable wsrep on thd
*/
class Wsrep_on
{
public:
Wsrep_on(THD* thd)
: m_thd(thd)
, m_wsrep_on(thd->variables.wsrep_on)
{
thd->variables.wsrep_on= TRUE;
}
~Wsrep_on()
{
m_thd->variables.wsrep_on= m_wsrep_on;
}
private:
THD* m_thd;
my_bool m_wsrep_on;
};
Wsrep_storage_service::Wsrep_storage_service(THD* thd)
: wsrep::storage_service()
, wsrep::high_priority_context(thd->wsrep_cs())
, m_thd(thd)
{
thd->security_ctx->skip_grants();
thd->system_thread= SYSTEM_THREAD_SLAVE_SQL;
/* No binlogging */
/* No general log */
thd->variables.option_bits |= OPTION_LOG_OFF;
/* Read committed isolation to avoid gap locking */
thd->variables.tx_isolation = ISO_READ_COMMITTED;
/* Keep wsrep on to enter commit ordering hooks */
thd->variables.wsrep_on= 1;
thd->wsrep_skip_locking= true;
wsrep_open(thd);
wsrep_before_command(thd);
}
Wsrep_storage_service::~Wsrep_storage_service()
{
wsrep_after_command_ignore_result(m_thd);
wsrep_close(m_thd);
m_thd->wsrep_skip_locking= false;
}
int Wsrep_storage_service::start_transaction(const wsrep::ws_handle& ws_handle)
{
DBUG_ENTER("Wsrep_storage_service::start_transaction");
DBUG_ASSERT(m_thd == current_thd);
DBUG_PRINT("info", ("Wsrep_storage_service::start_transcation(%llu, %p)",
m_thd->thread_id, m_thd));
m_thd->set_wsrep_next_trx_id(ws_handle.transaction_id().get());
DBUG_RETURN(m_thd->wsrep_cs().start_transaction(
wsrep::transaction_id(m_thd->wsrep_next_trx_id())) ||
trans_begin(m_thd, MYSQL_START_TRANS_OPT_READ_WRITE));
}
void Wsrep_storage_service::adopt_transaction(const wsrep::transaction& transaction)
{
DBUG_ENTER("Wsrep_Storage_server::adopt_transaction");
DBUG_ASSERT(m_thd == current_thd);
m_thd->wsrep_cs().adopt_transaction(transaction);
trans_begin(m_thd, MYSQL_START_TRANS_OPT_READ_WRITE);
DBUG_VOID_RETURN;
}
int Wsrep_storage_service::append_fragment(const wsrep::id& server_id,
wsrep::transaction_id transaction_id,
int flags,
const wsrep::const_buffer& data,
const wsrep::xid& xid WSREP_UNUSED)
{
DBUG_ENTER("Wsrep_storage_service::append_fragment");
DBUG_ASSERT(m_thd == current_thd);
DBUG_PRINT("info", ("Wsrep_storage_service::append_fragment(%llu, %p)",
m_thd->thread_id, m_thd));
int ret= wsrep_schema->append_fragment(m_thd,
server_id,
transaction_id,
wsrep::seqno(-1),
flags,
data);
DBUG_RETURN(ret);
}
int Wsrep_storage_service::update_fragment_meta(const wsrep::ws_meta& ws_meta)
{
DBUG_ENTER("Wsrep_storage_service::update_fragment_meta");
DBUG_ASSERT(m_thd == current_thd);
DBUG_PRINT("info", ("Wsrep_storage_service::update_fragment_meta(%llu, %p)",
m_thd->thread_id, m_thd));
int ret= wsrep_schema->update_fragment_meta(m_thd, ws_meta);
DBUG_RETURN(ret);
}
int Wsrep_storage_service::remove_fragments()
{
DBUG_ENTER("Wsrep_storage_service::remove_fragments");
DBUG_ASSERT(m_thd == current_thd);
int ret= wsrep_schema->remove_fragments(m_thd,
m_thd->wsrep_trx().server_id(),
m_thd->wsrep_trx().id(),
m_thd->wsrep_sr().fragments());
DBUG_RETURN(ret);
}
int Wsrep_storage_service::commit(const wsrep::ws_handle& ws_handle,
const wsrep::ws_meta& ws_meta)
{
DBUG_ENTER("Wsrep_storage_service::commit");
DBUG_ASSERT(m_thd == current_thd);
DBUG_PRINT("info", ("Wsrep_storage_service::commit(%llu, %p)",
m_thd->thread_id, m_thd));
WSREP_DEBUG("Storage service commit: %llu, %lld",
ws_meta.transaction_id().get(), ws_meta.seqno().get());
int ret= 0;
const bool is_ordered= !ws_meta.seqno().is_undefined();
if (is_ordered)
{
ret= m_thd->wsrep_cs().prepare_for_ordering(ws_handle, ws_meta, true);
}
ret= ret || trans_commit(m_thd);
if (!is_ordered)
{
/* Wsrep commit was not ordered so it does not go through commit time
hooks and remains active. Roll it back to make cleanup happen
in after_applying() call. */
m_thd->wsrep_cs().before_rollback();
m_thd->wsrep_cs().after_rollback();
}
else if (ret)
{
/* Commit failed, this probably means that the parent SR transaction
was BF aborted. Roll back out of order, the parent
transaction will release commit order after it has rolled back. */
m_thd->wsrep_cs().prepare_for_ordering(wsrep::ws_handle(),
wsrep::ws_meta(),
false);
trans_rollback(m_thd);
}
m_thd->wsrep_cs().after_applying();
m_thd->release_transactional_locks();
DBUG_RETURN(ret);
}
int Wsrep_storage_service::rollback(const wsrep::ws_handle& ws_handle,
const wsrep::ws_meta& ws_meta)
{
DBUG_ENTER("Wsrep_storage_service::rollback");
DBUG_ASSERT(m_thd == current_thd);
DBUG_PRINT("info", ("Wsrep_storage_service::rollback(%llu, %p)",
m_thd->thread_id, m_thd));
int ret= (m_thd->wsrep_cs().prepare_for_ordering(
ws_handle, ws_meta, false) ||
trans_rollback(m_thd));
m_thd->wsrep_cs().after_applying();
m_thd->release_transactional_locks();
DBUG_RETURN(ret);
}
void Wsrep_storage_service::store_globals()
{
wsrep_store_threadvars(m_thd);
}
void Wsrep_storage_service::reset_globals()
{
wsrep_reset_threadvars(m_thd);
}
|
