2 files changed, 606 insertions, 0 deletions
diff --git a/src/test/cls_lock/CMakeLists.txt b/src/test/cls_lock/CMakeLists.txt
new file mode 100644
index 000000000..eef2de40e
--- /dev/null
+++ b/src/test/cls_lock/CMakeLists.txt
@@ -0,0 +1,17 @@
+add_executable(ceph_test_cls_lock
+  test_cls_lock.cc
+  )
+target_link_libraries(ceph_test_cls_lock
+  cls_lock_client
+  librados
+  global
+  ${UNITTEST_LIBS}
+  ${BLKID_LIBRARIES}
+  ${CMAKE_DL_LIBS}
+  ${CRYPTO_LIBS}
+  ${EXTRALIBS}
+  radostest-cxx
+  )
+install(TARGETS
+  ceph_test_cls_lock
+  DESTINATION ${CMAKE_INSTALL_BINDIR})
diff --git a/src/test/cls_lock/test_cls_lock.cc b/src/test/cls_lock/test_cls_lock.cc
new file mode 100644
index 000000000..862720826
--- /dev/null
+++ b/src/test/cls_lock/test_cls_lock.cc
@@ -0,0 +1,589 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software 
+ * Foundation.  See file COPYING.
+ * 
+ */
+
+#include <iostream>
+#include <errno.h>
+
+#include "include/types.h"
+#include "common/Clock.h"
+#include "msg/msg_types.h"
+#include "include/rados/librados.hpp"
+
+#include "test/librados/test_cxx.h"
+#include "gtest/gtest.h"
+
+#include "cls/lock/cls_lock_client.h"
+#include "cls/lock/cls_lock_ops.h"
+
+using namespace std;
+using namespace librados;
+using namespace rados::cls::lock;
+
+void lock_info(IoCtx *ioctx, string& oid, string& name, map<locker_id_t, locker_info_t>& lockers,
+	       ClsLockType *assert_type, string *assert_tag)
+{
+  ClsLockType lock_type = ClsLockType::NONE;
+  string tag;
+  lockers.clear();
+  ASSERT_EQ(0, get_lock_info(ioctx, oid, name, &lockers, &lock_type, &tag));
+  cout << "lock: " << name << std::endl;
+  cout << "  lock_type: " << cls_lock_type_str(lock_type) << std::endl;
+  cout << "  tag: " << tag << std::endl;
+  cout << "  lockers:" << std::endl;
+
+  if (assert_type) {
+    ASSERT_EQ(*assert_type, lock_type);
+  }
+
+  if (assert_tag) {
+    ASSERT_EQ(*assert_tag, tag);
+  }
+
+  map<locker_id_t, locker_info_t>::iterator liter;
+  for (liter = lockers.begin(); liter != lockers.end(); ++liter) {
+    const locker_id_t& locker = liter->first;
+    cout << "    " << locker.locker << " expiration=" << liter->second.expiration
+         << " addr=" << liter->second.addr << " cookie=" << locker.cookie << std::endl;
+  }
+}
+
+void lock_info(IoCtx *ioctx, string& oid, string& name, map<locker_id_t, locker_info_t>& lockers)
+{
+  lock_info(ioctx, oid, name, lockers, NULL, NULL);
+}
+
+bool lock_expired(IoCtx *ioctx, string& oid, string& name)
+{
+  ClsLockType lock_type = ClsLockType::NONE;
+  string tag;
+  map<locker_id_t, locker_info_t> lockers;
+  if (0 == get_lock_info(ioctx, oid, name, &lockers, &lock_type, &tag))
+    return false;
+  utime_t now = ceph_clock_now();
+  map<locker_id_t, locker_info_t>::iterator liter;
+  for (liter = lockers.begin(); liter != lockers.end(); ++liter) {
+    if (liter->second.expiration > now)
+      return false;
+  }
+
+  return true;
+}
+
+TEST(ClsLock, TestMultiLocking) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+  ClsLockType lock_type_shared = ClsLockType::SHARED;
+  ClsLockType lock_type_exclusive = ClsLockType::EXCLUSIVE;
+
+
+  Rados cluster2;
+  IoCtx ioctx2;
+  ASSERT_EQ("", connect_cluster_pp(cluster2));
+  cluster2.ioctx_create(pool_name.c_str(), ioctx2);
+
+  string oid = "foo";
+  bufferlist bl;
+  string lock_name = "mylock";
+
+  ASSERT_EQ(0, ioctx.write(oid, bl, bl.length(), 0));
+
+  Lock l(lock_name);
+  // we set the duration, so the log output contains a locker with a
+  // non-zero expiration time
+  l.set_duration(utime_t(120, 0));
+
+  /* test lock object */
+
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+
+  /* test exclusive lock */
+  ASSERT_EQ(-EEXIST, l.lock_exclusive(&ioctx, oid));
+
+  /* test idempotency */
+  l.set_may_renew(true);
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+
+  l.set_may_renew(false);
+
+  /* test second client */
+  Lock l2(lock_name);
+  ASSERT_EQ(-EBUSY, l2.lock_exclusive(&ioctx2, oid));
+  ASSERT_EQ(-EBUSY, l2.lock_shared(&ioctx2, oid));
+
+  list<string> locks;
+  ASSERT_EQ(0, list_locks(&ioctx, oid, &locks));
+
+  ASSERT_EQ(1, (int)locks.size());
+  list<string>::iterator iter = locks.begin();
+  map<locker_id_t, locker_info_t> lockers;
+  lock_info(&ioctx, oid, *iter, lockers, &lock_type_exclusive, NULL);
+
+  ASSERT_EQ(1, (int)lockers.size());
+
+  /* test unlock */
+  ASSERT_EQ(0, l.unlock(&ioctx, oid));
+  locks.clear();
+  ASSERT_EQ(0, list_locks(&ioctx, oid, &locks));
+
+  /* test shared lock */
+  ASSERT_EQ(0, l2.lock_shared(&ioctx2, oid));
+  ASSERT_EQ(0, l.lock_shared(&ioctx, oid));
+
+  locks.clear();
+  ASSERT_EQ(0, list_locks(&ioctx, oid, &locks));
+  ASSERT_EQ(1, (int)locks.size());
+  iter = locks.begin();
+  lock_info(&ioctx, oid, *iter, lockers, &lock_type_shared, NULL);
+  ASSERT_EQ(2, (int)lockers.size());
+
+  /* test break locks */
+  entity_name_t name = entity_name_t::CLIENT(cluster.get_instance_id());
+  entity_name_t name2 = entity_name_t::CLIENT(cluster2.get_instance_id());
+
+  l2.break_lock(&ioctx2, oid, name);
+  lock_info(&ioctx, oid, *iter, lockers);
+  ASSERT_EQ(1, (int)lockers.size());
+  map<locker_id_t, locker_info_t>::iterator liter = lockers.begin();
+  const locker_id_t& id = liter->first;
+  ASSERT_EQ(name2, id.locker);
+
+  /* test lock tag */
+  Lock l_tag(lock_name);
+  l_tag.set_tag("non-default tag");
+  ASSERT_EQ(-EBUSY, l_tag.lock_shared(&ioctx, oid));
+
+
+  /* test modify description */
+  string description = "new description";
+  l.set_description(description);
+  ASSERT_EQ(0, l.lock_shared(&ioctx, oid));
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+TEST(ClsLock, TestMeta) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+
+  Rados cluster2;
+  IoCtx ioctx2;
+  ASSERT_EQ("", connect_cluster_pp(cluster2));
+  cluster2.ioctx_create(pool_name.c_str(), ioctx2);
+
+  string oid = "foo";
+  bufferlist bl;
+  string lock_name = "mylock";
+
+  ASSERT_EQ(0, ioctx.write(oid, bl, bl.length(), 0));
+
+  Lock l(lock_name);
+  ASSERT_EQ(0, l.lock_shared(&ioctx, oid));
+
+  /* test lock tag */
+  Lock l_tag(lock_name);
+  l_tag.set_tag("non-default tag");
+  ASSERT_EQ(-EBUSY, l_tag.lock_shared(&ioctx2, oid));
+
+
+  ASSERT_EQ(0, l.unlock(&ioctx, oid));
+
+  /* test description */
+  Lock l2(lock_name);
+  string description = "new description";
+  l2.set_description(description);
+  ASSERT_EQ(0, l2.lock_shared(&ioctx2, oid));
+
+  map<locker_id_t, locker_info_t> lockers;
+  lock_info(&ioctx, oid, lock_name, lockers, NULL, NULL);
+  ASSERT_EQ(1, (int)lockers.size());
+
+  map<locker_id_t, locker_info_t>::iterator iter = lockers.begin();
+  locker_info_t locker = iter->second;
+  ASSERT_EQ("new description", locker.description);
+
+  ASSERT_EQ(0, l2.unlock(&ioctx2, oid));
+
+  /* check new tag */
+  string new_tag = "new_tag";
+  l.set_tag(new_tag);
+  l.set_may_renew(true);
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+  lock_info(&ioctx, oid, lock_name, lockers, NULL, &new_tag);
+  ASSERT_EQ(1, (int)lockers.size());
+  l.set_tag("");
+  ASSERT_EQ(-EBUSY, l.lock_exclusive(&ioctx, oid));
+  l.set_tag(new_tag);
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+TEST(ClsLock, TestCookie) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  string oid = "foo";
+  string lock_name = "mylock";
+  Lock l(lock_name);
+
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+
+  /* new cookie */
+  string cookie = "new cookie";
+  l.set_cookie(cookie);
+  ASSERT_EQ(-EBUSY, l.lock_exclusive(&ioctx, oid));
+  ASSERT_EQ(-ENOENT, l.unlock(&ioctx, oid));
+  l.set_cookie("");
+  ASSERT_EQ(0, l.unlock(&ioctx, oid));
+
+  map<locker_id_t, locker_info_t> lockers;
+  lock_info(&ioctx, oid, lock_name, lockers);
+  ASSERT_EQ(0, (int)lockers.size());
+
+  l.set_cookie(cookie);
+  ASSERT_EQ(0, l.lock_shared(&ioctx, oid));
+  l.set_cookie("");
+  ASSERT_EQ(0, l.lock_shared(&ioctx, oid));
+
+  lock_info(&ioctx, oid, lock_name, lockers);
+  ASSERT_EQ(2, (int)lockers.size());
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+TEST(ClsLock, TestMultipleLocks) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  string oid = "foo";
+  Lock l("lock1");
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+
+  Lock l2("lock2");
+  ASSERT_EQ(0, l2.lock_exclusive(&ioctx, oid));
+
+  list<string> locks;
+  ASSERT_EQ(0, list_locks(&ioctx, oid, &locks));
+
+  ASSERT_EQ(2, (int)locks.size());
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+TEST(ClsLock, TestLockDuration) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  string oid = "foo";
+  Lock l("lock");
+  utime_t dur(5, 0);
+  l.set_duration(dur);
+  utime_t start = ceph_clock_now();
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+  int r = l.lock_exclusive(&ioctx, oid);
+  if (r == 0) {
+    // it's possible to get success if we were just really slow...
+    ASSERT_TRUE(ceph_clock_now() > start + dur);
+  } else {
+    ASSERT_EQ(-EEXIST, r);
+  }
+
+  sleep(dur.sec());
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+TEST(ClsLock, TestAssertLocked) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  string oid = "foo";
+  Lock l("lock1");
+  ASSERT_EQ(0, l.lock_exclusive(&ioctx, oid));
+
+  librados::ObjectWriteOperation op1;
+  l.assert_locked_exclusive(&op1);
+  ASSERT_EQ(0, ioctx.operate(oid, &op1));
+
+  librados::ObjectWriteOperation op2;
+  l.assert_locked_shared(&op2);
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op2));
+
+  l.set_tag("tag");
+  librados::ObjectWriteOperation op3;
+  l.assert_locked_exclusive(&op3);
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op3));
+  l.set_tag("");
+
+  l.set_cookie("cookie");
+  librados::ObjectWriteOperation op4;
+  l.assert_locked_exclusive(&op4);
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op4));
+  l.set_cookie("");
+
+  ASSERT_EQ(0, l.unlock(&ioctx, oid));
+
+  librados::ObjectWriteOperation op5;
+  l.assert_locked_exclusive(&op5);
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op5));
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+TEST(ClsLock, TestSetCookie) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  string oid = "foo";
+  string name = "name";
+  string tag = "tag";
+  string cookie = "cookie";
+  string new_cookie = "new cookie";
+  librados::ObjectWriteOperation op1;
+  set_cookie(&op1, name, ClsLockType::SHARED, cookie, tag, new_cookie);
+  ASSERT_EQ(-ENOENT, ioctx.operate(oid, &op1));
+
+  librados::ObjectWriteOperation op2;
+  lock(&op2, name, ClsLockType::SHARED, cookie, tag, "", utime_t{}, 0);
+  ASSERT_EQ(0, ioctx.operate(oid, &op2));
+
+  librados::ObjectWriteOperation op3;
+  lock(&op3, name, ClsLockType::SHARED, "cookie 2", tag, "", utime_t{}, 0);
+  ASSERT_EQ(0, ioctx.operate(oid, &op3));
+
+  librados::ObjectWriteOperation op4;
+  set_cookie(&op4, name, ClsLockType::SHARED, cookie, tag, cookie);
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op4));
+
+  librados::ObjectWriteOperation op5;
+  set_cookie(&op5, name, ClsLockType::SHARED, cookie, "wrong tag", new_cookie);
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op5));
+
+  librados::ObjectWriteOperation op6;
+  set_cookie(&op6, name, ClsLockType::SHARED, "wrong cookie", tag, new_cookie);
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op6));
+
+  librados::ObjectWriteOperation op7;
+  set_cookie(&op7, name, ClsLockType::EXCLUSIVE, cookie, tag, new_cookie);
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op7));
+
+  librados::ObjectWriteOperation op8;
+  set_cookie(&op8, name, ClsLockType::SHARED, cookie, tag, "cookie 2");
+  ASSERT_EQ(-EBUSY, ioctx.operate(oid, &op8));
+
+  librados::ObjectWriteOperation op9;
+  set_cookie(&op9, name, ClsLockType::SHARED, cookie, tag, new_cookie);
+  ASSERT_EQ(0, ioctx.operate(oid, &op9));
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+TEST(ClsLock, TestRenew) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  bufferlist bl;
+
+  string oid1 = "foo1";
+  string lock_name1 = "mylock1";
+
+  ASSERT_EQ(0, ioctx.write(oid1, bl, bl.length(), 0));
+
+  Lock l1(lock_name1);
+  utime_t lock_duration1(5, 0);
+  l1.set_duration(lock_duration1);
+
+  ASSERT_EQ(0, l1.lock_exclusive(&ioctx, oid1));
+  l1.set_may_renew(true);
+  sleep(2);
+  ASSERT_EQ(0, l1.lock_exclusive(&ioctx, oid1));
+  sleep(7);
+  ASSERT_EQ(0, l1.lock_exclusive(&ioctx, oid1)) <<
+    "when a cls_lock is set to may_renew, a relock after expiration "
+    "should still work";
+  ASSERT_EQ(0, l1.unlock(&ioctx, oid1));
+
+  // ***********************************************
+
+  string oid2 = "foo2";
+  string lock_name2 = "mylock2";
+
+  ASSERT_EQ(0, ioctx.write(oid2, bl, bl.length(), 0));
+
+  Lock l2(lock_name2);
+  utime_t lock_duration2(5, 0);
+  l2.set_duration(lock_duration2);
+
+  ASSERT_EQ(0, l2.lock_exclusive(&ioctx, oid2));
+  l2.set_must_renew(true);
+  sleep(2);
+  ASSERT_EQ(0, l2.lock_exclusive(&ioctx, oid2));
+  sleep(7);
+  ASSERT_EQ(-ENOENT, l2.lock_exclusive(&ioctx, oid2)) <<
+    "when a cls_lock is set to must_renew, a relock after expiration "
+    "should fail";
+  ASSERT_EQ(-ENOENT, l2.unlock(&ioctx, oid2));
+
+  // ***********************************************
+
+  string oid3 = "foo3";
+  string lock_name3 = "mylock3";
+
+  ASSERT_EQ(0, ioctx.write(oid3, bl, bl.length(), 0));
+
+  Lock l3(lock_name3);
+  l3.set_duration(utime_t(5, 0));
+  l3.set_must_renew(true);
+
+  ASSERT_EQ(-ENOENT, l3.lock_exclusive(&ioctx, oid3)) <<
+    "unable to create a lock with must_renew";
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+TEST(ClsLock, TestExclusiveEphemeralBasic) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  bufferlist bl;
+
+  string oid1 = "foo1";
+  string oid2 = "foo2";
+  string lock_name1 = "mylock1";
+  string lock_name2 = "mylock2";
+
+  Lock l1(lock_name1);
+  l1.set_duration(utime_t(5, 0));
+
+  uint64_t size;
+  time_t mod_time;
+
+  l1.set_may_renew(true);
+  ASSERT_EQ(0, l1.lock_exclusive_ephemeral(&ioctx, oid1));
+  ASSERT_EQ(0, ioctx.stat(oid1, &size, &mod_time));
+  sleep(2);
+  int r1 = l1.unlock(&ioctx, oid1);
+  EXPECT_TRUE(r1 == 0 || ((r1 == -ENOENT) && (lock_expired(&ioctx, oid1, lock_name1))))
+    << "unlock should return 0 or -ENOENT return: " << r1;
+  ASSERT_EQ(-ENOENT, ioctx.stat(oid1, &size, &mod_time));
+
+  // ***********************************************
+
+  Lock l2(lock_name2);
+  utime_t lock_duration2(5, 0);
+  l2.set_duration(utime_t(5, 0));
+
+  ASSERT_EQ(0, l2.lock_exclusive(&ioctx, oid2));
+  ASSERT_EQ(0, ioctx.stat(oid2, &size, &mod_time));
+  sleep(2);
+  int r2 = l2.unlock(&ioctx, oid2);
+  EXPECT_TRUE(r2 == 0 || ((r2 == -ENOENT) && (lock_expired(&ioctx, oid2, lock_name2))))
+    << "unlock should return 0 or -ENOENT return: " << r2;
+  ASSERT_EQ(0, ioctx.stat(oid2, &size, &mod_time));
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+
+TEST(ClsLock, TestExclusiveEphemeralStealEphemeral) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  bufferlist bl;
+
+  string oid1 = "foo1";
+  string lock_name1 = "mylock1";
+
+  Lock l1(lock_name1);
+  l1.set_duration(utime_t(3, 0));
+
+  ASSERT_EQ(0, l1.lock_exclusive_ephemeral(&ioctx, oid1));
+  sleep(4);
+
+  // l1 is expired, l2 can take; l2 is also exclusive_ephemeral
+  Lock l2(lock_name1);
+  l2.set_duration(utime_t(3, 0));
+  ASSERT_EQ(0, l2.lock_exclusive_ephemeral(&ioctx, oid1));
+  sleep(1);
+  ASSERT_EQ(0, l2.unlock(&ioctx, oid1));
+
+  // l2 cannot unlock its expired lock
+  ASSERT_EQ(-ENOENT, l1.unlock(&ioctx, oid1));
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}
+
+
+TEST(ClsLock, TestExclusiveEphemeralStealExclusive) {
+  Rados cluster;
+  std::string pool_name = get_temp_pool_name();
+  ASSERT_EQ("", create_one_pool_pp(pool_name, cluster));
+  IoCtx ioctx;
+  cluster.ioctx_create(pool_name.c_str(), ioctx);
+
+  bufferlist bl;
+
+  string oid1 = "foo1";
+  string lock_name1 = "mylock1";
+
+  Lock l1(lock_name1);
+  l1.set_duration(utime_t(3, 0));
+
+  ASSERT_EQ(0, l1.lock_exclusive_ephemeral(&ioctx, oid1));
+  sleep(4);
+
+  // l1 is expired, l2 can take; l2 is exclusive (but not ephemeral)
+  Lock l2(lock_name1);
+  l2.set_duration(utime_t(3, 0));
+  ASSERT_EQ(0, l2.lock_exclusive(&ioctx, oid1));
+  sleep(1);
+  ASSERT_EQ(0, l2.unlock(&ioctx, oid1));
+
+  // l2 cannot unlock its expired lock
+  ASSERT_EQ(-ENOENT, l1.unlock(&ioctx, oid1));
+
+  ASSERT_EQ(0, destroy_one_pool_pp(pool_name, cluster));
+}