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
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "gtest/gtest.h"
#include "mds/mdstypes.h"
#include "include/buffer.h"
#include "include/rbd_types.h"
#include "include/rados/librados.h"
#include "include/rados/librados.hpp"
#include "include/stringify.h"
#include "include/types.h"
#include "global/global_context.h"
#include "global/global_init.h"
#include "common/ceph_argparse.h"
#include "common/common_init.h"
#include "common/Cond.h"
#include "json_spirit/json_spirit.h"
#include <errno.h>
#include <map>
#include <sstream>
#include <string>
using namespace librados;
using std::map;
using std::ostringstream;
using std::string;
int get_primary_osd(Rados& rados, const string& pool_name,
const string& oid, int *pprimary)
{
bufferlist inbl;
string cmd = string("{\"prefix\": \"osd map\",\"pool\":\"")
+ pool_name
+ string("\",\"object\": \"")
+ oid
+ string("\",\"format\": \"json\"}");
bufferlist outbl;
if (int r = rados.mon_command(cmd, inbl, &outbl, nullptr);
r < 0) {
return r;
}
string outstr(outbl.c_str(), outbl.length());
json_spirit::Value v;
if (!json_spirit::read(outstr, v)) {
cerr <<" unable to parse json " << outstr << std::endl;
return -1;
}
json_spirit::Object& o = v.get_obj();
for (json_spirit::Object::size_type i=0; i<o.size(); i++) {
json_spirit::Pair& p = o[i];
if (p.name_ == "acting_primary") {
cout << "primary = " << p.value_.get_int() << std::endl;
*pprimary = p.value_.get_int();
return 0;
}
}
cerr << "didn't find primary in " << outstr << std::endl;
return -1;
}
int fence_osd(Rados& rados, int osd)
{
bufferlist inbl, outbl;
string cmd("{\"prefix\": \"injectargs\",\"injected_args\":["
"\"--ms-blackhole-osd\", "
"\"--ms-blackhole-mon\"]}");
return rados.osd_command(osd, cmd, inbl, &outbl, NULL);
}
int mark_down_osd(Rados& rados, int osd)
{
bufferlist inbl, outbl;
string cmd("{\"prefix\": \"osd down\",\"ids\":[\"" +
stringify(osd) + "\"]}");
return rados.mon_command(cmd, inbl, &outbl, NULL);
}
TEST(OSD, StaleRead) {
// create two rados instances, one pool
Rados rados1, rados2;
IoCtx ioctx1, ioctx2;
int r;
r = rados1.init_with_context(g_ceph_context);
ASSERT_EQ(0, r);
r = rados1.connect();
ASSERT_EQ(0, r);
srand(time(0));
string pool_name = "read-hole-test-" + stringify(rand());
r = rados1.pool_create(pool_name.c_str());
ASSERT_EQ(0, r);
r = rados1.ioctx_create(pool_name.c_str(), ioctx1);
ASSERT_EQ(0, r);
r = rados2.init_with_context(g_ceph_context);
ASSERT_EQ(0, r);
r = rados2.connect();
ASSERT_EQ(0, r);
r = rados2.ioctx_create(pool_name.c_str(), ioctx2);
ASSERT_EQ(0, r);
string oid = "foo";
bufferlist one;
one.append("one");
{
cout << "client1: writing 'one'" << std::endl;
r = ioctx1.write_full(oid, one);
ASSERT_EQ(0, r);
}
// make sure 2 can read it
{
cout << "client2: reading 'one'" << std::endl;
bufferlist bl;
r = ioctx2.read(oid, bl, 3, 0);
ASSERT_EQ(3, r);
ASSERT_EQ('o', bl[0]);
ASSERT_EQ('n', bl[1]);
ASSERT_EQ('e', bl[2]);
}
// find the primary
int primary;
r = get_primary_osd(rados1, pool_name, oid, &primary);
ASSERT_EQ(0, r);
// fence it
cout << "client1: fencing primary" << std::endl;
fence_osd(rados1, primary);
mark_down_osd(rados1, primary);
rados1.wait_for_latest_osdmap();
// should still be able to read the old value on 2
{
cout << "client2: reading 'one' again from old primary" << std::endl;
bufferlist bl;
r = ioctx2.read(oid, bl, 3, 0);
ASSERT_EQ(3, r);
ASSERT_EQ('o', bl[0]);
ASSERT_EQ('n', bl[1]);
ASSERT_EQ('e', bl[2]);
}
// update object on 1
bufferlist two;
two.append("two");
{
cout << "client1: writing 'two' to new acting set" << std::endl;
r = ioctx1.write_full(oid, two);
ASSERT_EQ(0, r);
}
// make sure we can't still read the old value on 2
{
cout << "client2: reading again from old primary" << std::endl;
bufferlist bl;
r = ioctx2.read(oid, bl, 3, 0);
ASSERT_EQ(3, r);
ASSERT_EQ('t', bl[0]);
ASSERT_EQ('w', bl[1]);
ASSERT_EQ('o', bl[2]);
}
rados1.shutdown();
rados2.shutdown();
}
int main(int argc, char **argv) {
vector<const char*> args;
argv_to_vec(argc, (const char **)argv, args);
auto cct = global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT,
CODE_ENVIRONMENT_UTILITY, 0);
common_init_finish(g_ceph_context);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
|
