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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "test/librbd/test_fixture.h"
#include "test/librbd/test_support.h"
#include "librbd/internal.h"
#include "librbd/Journal.h"
#include "librbd/api/Io.h"
#include "librbd/io/AioCompletion.h"
#include "librbd/journal/Types.h"
#include "journal/Journaler.h"
#include "journal/ReplayEntry.h"
#include "journal/ReplayHandler.h"
#include "journal/Settings.h"
#include <list>
#include <boost/variant.hpp>
void register_test_journal_entries() {
}
namespace librbd {
namespace journal {
class TestJournalEntries : public TestFixture {
public:
typedef std::list<::journal::Journaler *> Journalers;
struct ReplayHandler : public ::journal::ReplayHandler {
ceph::mutex lock = ceph::make_mutex("ReplayHandler::lock");
ceph::condition_variable cond;
bool entries_available;
bool complete;
ReplayHandler()
: entries_available(false), complete(false) {
}
void handle_entries_available() override {
std::lock_guard locker{lock};
entries_available = true;
cond.notify_all();
}
void handle_complete(int r) override {
std::lock_guard locker{lock};
complete = true;
cond.notify_all();
}
};
ReplayHandler m_replay_handler;
Journalers m_journalers;
void TearDown() override {
for (Journalers::iterator it = m_journalers.begin();
it != m_journalers.end(); ++it) {
::journal::Journaler *journaler = *it;
journaler->stop_replay();
journaler->shut_down();
delete journaler;
}
TestFixture::TearDown();
}
::journal::Journaler *create_journaler(librbd::ImageCtx *ictx) {
::journal::Journaler *journaler = new ::journal::Journaler(
ictx->md_ctx, ictx->id, "dummy client", {}, nullptr);
int r = journaler->register_client(bufferlist());
if (r < 0) {
ADD_FAILURE() << "failed to register journal client";
delete journaler;
return NULL;
}
C_SaferCond cond;
journaler->init(&cond);
r = cond.wait();
if (r < 0) {
ADD_FAILURE() << "failed to initialize journal client";
delete journaler;
return NULL;
}
journaler->start_live_replay(&m_replay_handler, 0.1);
m_journalers.push_back(journaler);
return journaler;
}
bool wait_for_entries_available(librbd::ImageCtx *ictx) {
std::unique_lock locker{m_replay_handler.lock};
while (!m_replay_handler.entries_available) {
if (m_replay_handler.cond.wait_for(locker, 10s) == std::cv_status::timeout) {
return false;
}
}
m_replay_handler.entries_available = false;
return true;
}
bool get_event_entry(const ::journal::ReplayEntry &replay_entry,
librbd::journal::EventEntry *event_entry) {
try {
bufferlist data_bl = replay_entry.get_data();
auto it = data_bl.cbegin();
decode(*event_entry, it);
} catch (const buffer::error &err) {
return false;
}
return true;
}
};
TEST_F(TestJournalEntries, AioWrite) {
REQUIRE_FEATURE(RBD_FEATURE_JOURNALING);
librbd::ImageCtx *ictx;
ASSERT_EQ(0, open_image(m_image_name, &ictx));
::journal::Journaler *journaler = create_journaler(ictx);
ASSERT_TRUE(journaler != NULL);
std::string buffer(512, '1');
bufferlist write_bl;
write_bl.append(buffer);
C_SaferCond cond_ctx;
auto c = librbd::io::AioCompletion::create(&cond_ctx);
c->get();
api::Io<>::aio_write(*ictx, c, 123, buffer.size(), std::move(write_bl), 0,
true);
ASSERT_EQ(0, c->wait_for_complete());
c->put();
ASSERT_TRUE(wait_for_entries_available(ictx));
::journal::ReplayEntry replay_entry;
ASSERT_TRUE(journaler->try_pop_front(&replay_entry));
librbd::journal::EventEntry event_entry;
ASSERT_TRUE(get_event_entry(replay_entry, &event_entry));
ASSERT_EQ(librbd::journal::EVENT_TYPE_AIO_WRITE,
event_entry.get_event_type());
librbd::journal::AioWriteEvent aio_write_event =
boost::get<librbd::journal::AioWriteEvent>(event_entry.event);
ASSERT_EQ(123U, aio_write_event.offset);
ASSERT_EQ(buffer.size(), aio_write_event.length);
bufferlist buffer_bl;
buffer_bl.append(buffer);
ASSERT_TRUE(aio_write_event.data.contents_equal(buffer_bl));
ASSERT_EQ(librbd::journal::AioWriteEvent::get_fixed_size() +
aio_write_event.data.length(), replay_entry.get_data().length());
}
TEST_F(TestJournalEntries, AioDiscard) {
REQUIRE_FEATURE(RBD_FEATURE_JOURNALING);
CephContext* cct = reinterpret_cast<CephContext*>(_rados.cct());
REQUIRE(!cct->_conf.get_val<bool>("rbd_skip_partial_discard"));
librbd::ImageCtx *ictx;
ASSERT_EQ(0, open_image(m_image_name, &ictx));
::journal::Journaler *journaler = create_journaler(ictx);
ASSERT_TRUE(journaler != NULL);
C_SaferCond cond_ctx;
auto c = librbd::io::AioCompletion::create(&cond_ctx);
c->get();
api::Io<>::aio_discard(*ictx, c, 123, 234, ictx->discard_granularity_bytes,
true);
ASSERT_EQ(0, c->wait_for_complete());
c->put();
ASSERT_TRUE(wait_for_entries_available(ictx));
::journal::ReplayEntry replay_entry;
ASSERT_TRUE(journaler->try_pop_front(&replay_entry));
librbd::journal::EventEntry event_entry;
ASSERT_TRUE(get_event_entry(replay_entry, &event_entry));
ASSERT_EQ(librbd::journal::EVENT_TYPE_AIO_DISCARD,
event_entry.get_event_type());
librbd::journal::AioDiscardEvent aio_discard_event =
boost::get<librbd::journal::AioDiscardEvent>(event_entry.event);
ASSERT_EQ(123U, aio_discard_event.offset);
ASSERT_EQ(234U, aio_discard_event.length);
}
TEST_F(TestJournalEntries, AioFlush) {
REQUIRE_FEATURE(RBD_FEATURE_JOURNALING);
librbd::ImageCtx *ictx;
ASSERT_EQ(0, open_image(m_image_name, &ictx));
::journal::Journaler *journaler = create_journaler(ictx);
ASSERT_TRUE(journaler != NULL);
C_SaferCond cond_ctx;
auto c = librbd::io::AioCompletion::create(&cond_ctx);
c->get();
api::Io<>::aio_flush(*ictx, c, true);
ASSERT_EQ(0, c->wait_for_complete());
c->put();
ASSERT_TRUE(wait_for_entries_available(ictx));
::journal::ReplayEntry replay_entry;
ASSERT_TRUE(journaler->try_pop_front(&replay_entry));
librbd::journal::EventEntry event_entry;
ASSERT_TRUE(get_event_entry(replay_entry, &event_entry));
ASSERT_EQ(librbd::journal::EVENT_TYPE_AIO_FLUSH,
event_entry.get_event_type());
}
} // namespace journal
} // namespace librbd
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