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// -*- 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 std;
using namespace librados;
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) {
auto args = argv_to_vec(argc, argv);
auto cct = global_init(nullptr, args, CEPH_ENTITY_TYPE_CLIENT,
CODE_ENVIRONMENT_UTILITY, 0);
common_init_finish(g_ceph_context);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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