src/ceph/src/test/librbd/test_mock_ExclusiveLock.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include "test/librbd/test_mock_fixture.h"
   5 #include "test/librbd/test_support.h"
   6 #include "test/librbd/mock/MockImageCtx.h"
   7 #include "librbd/ExclusiveLock.h"
   8 #include "librbd/ManagedLock.h"
   9 #include "librbd/exclusive_lock/PreAcquireRequest.h"
  10 #include "librbd/exclusive_lock/PostAcquireRequest.h"
  11 #include "librbd/exclusive_lock/PreReleaseRequest.h"
  12 #include "gmock/gmock.h"
  13 #include "gtest/gtest.h"
  14 #include <list>
  15
  16 namespace librbd {
  17
  18 namespace {
  19
  20 struct MockExclusiveLockImageCtx : public MockImageCtx {
  21   ContextWQ *op_work_queue;
  22
  23   MockExclusiveLockImageCtx(ImageCtx &image_ctx) : MockImageCtx(image_ctx) {
  24     op_work_queue = image_ctx.op_work_queue;
  25   }
  26 };
  27
  28 } // anonymous namespace
  29
  30 namespace watcher {
  31 template <>
  32 struct Traits<MockExclusiveLockImageCtx> {
  33   typedef librbd::MockImageWatcher Watcher;
  34 };
  35 }
  36
  37 template <>
  38 struct ManagedLock<MockExclusiveLockImageCtx> {
  39   ManagedLock(librados::IoCtx& ioctx, ContextWQ *work_queue,
  40               const std::string& oid, librbd::MockImageWatcher *watcher,
  41               managed_lock::Mode  mode, bool blacklist_on_break_lock,
  42               uint32_t blacklist_expire_seconds)
  43     : m_lock("ManagedLock::m_lock") {
  44   }
  45
  46   virtual ~ManagedLock() = default;
  47
  48   mutable Mutex m_lock;
  49
  50   virtual void shutdown_handler(int r, Context *) = 0;
  51   virtual void pre_acquire_lock_handler(Context *) = 0;
  52   virtual void post_acquire_lock_handler(int, Context *) = 0;
  53   virtual void pre_release_lock_handler(bool, Context *) = 0;
  54   virtual void post_release_lock_handler(bool, int, Context *) = 0;
  55   virtual void post_reacquire_lock_handler(int, Context *) = 0;
  56
  57   MOCK_CONST_METHOD0(is_lock_owner, bool());
  58
  59   MOCK_METHOD1(shut_down, void(Context*));
  60   MOCK_METHOD1(acquire_lock, void(Context*));
  61
  62   void set_state_uninitialized() {
  63   }
  64
  65   MOCK_METHOD0(set_state_initializing, void());
  66   MOCK_METHOD0(set_state_unlocked, void());
  67   MOCK_METHOD0(set_state_waiting_for_lock, void());
  68   MOCK_METHOD0(set_state_post_acquiring, void());
  69
  70   MOCK_CONST_METHOD0(is_state_shutdown, bool());
  71   MOCK_CONST_METHOD0(is_state_acquiring, bool());
  72   MOCK_CONST_METHOD0(is_state_post_acquiring, bool());
  73   MOCK_CONST_METHOD0(is_state_releasing, bool());
  74   MOCK_CONST_METHOD0(is_state_pre_releasing, bool());
  75   MOCK_CONST_METHOD0(is_state_locked, bool());
  76   MOCK_CONST_METHOD0(is_state_waiting_for_lock, bool());
  77
  78   MOCK_CONST_METHOD0(is_action_acquire_lock, bool());
  79   MOCK_METHOD0(execute_next_action, void());
  80
  81 };
  82
  83 namespace exclusive_lock {
  84
  85 using librbd::ImageWatcher;
  86
  87 template<typename T>
  88 struct BaseRequest {
  89   static std::list<T *> s_requests;
  90   Context *on_lock_unlock = nullptr;
  91   Context *on_finish = nullptr;
  92
  93   static T* create(MockExclusiveLockImageCtx &image_ctx,
  94                    Context *on_lock_unlock, Context *on_finish) {
  95     assert(!s_requests.empty());
  96     T* req = s_requests.front();
  97     req->on_lock_unlock = on_lock_unlock;
  98     req->on_finish = on_finish;
  99     s_requests.pop_front();
 100     return req;
 101   }
 102
 103   BaseRequest() {
 104     s_requests.push_back(reinterpret_cast<T*>(this));
 105   }
 106 };
 107
 108 template<typename T>
 109 std::list<T *> BaseRequest<T>::s_requests;
 110
 111 template <>
 112 struct PreAcquireRequest<MockExclusiveLockImageCtx> : public BaseRequest<PreAcquireRequest<MockExclusiveLockImageCtx> > {
 113   static PreAcquireRequest<MockExclusiveLockImageCtx> *create(
 114       MockExclusiveLockImageCtx &image_ctx, Context *on_finish) {
 115     return BaseRequest::create(image_ctx, nullptr, on_finish);
 116   }
 117   MOCK_METHOD0(send, void());
 118 };
 119
 120 template <>
 121 struct PostAcquireRequest<MockExclusiveLockImageCtx> : public BaseRequest<PostAcquireRequest<MockExclusiveLockImageCtx> > {
 122   MOCK_METHOD0(send, void());
 123 };
 124
 125 template <>
 126 struct PreReleaseRequest<MockExclusiveLockImageCtx> : public BaseRequest<PreReleaseRequest<MockExclusiveLockImageCtx> > {
 127   static PreReleaseRequest<MockExclusiveLockImageCtx> *create(
 128       MockExclusiveLockImageCtx &image_ctx, bool shutting_down,
 129       AsyncOpTracker &async_op_tracker, Context *on_finish) {
 130     return BaseRequest::create(image_ctx, nullptr, on_finish);
 131   }
 132   MOCK_METHOD0(send, void());
 133 };
 134
 135 } // namespace exclusive_lock
 136 } // namespace librbd
 137
 138 // template definitions
 139 #include "librbd/ExclusiveLock.cc"
 140
 141 ACTION_P(FinishLockUnlock, request) {
 142   if (request->on_lock_unlock != nullptr) {
 143     request->on_lock_unlock->complete(0);
 144   }
 145 }
 146
 147 ACTION_P2(CompleteRequest, request, ret) {
 148   request->on_finish->complete(ret);
 149 }
 150
 151 namespace librbd {
 152
 153 using ::testing::_;
 154 using ::testing::DoAll;
 155 using ::testing::Invoke;
 156 using ::testing::InSequence;
 157 using ::testing::Return;
 158
 159 class TestMockExclusiveLock : public TestMockFixture {
 160 public:
 161   typedef ManagedLock<MockExclusiveLockImageCtx> MockManagedLock;
 162   typedef ExclusiveLock<MockExclusiveLockImageCtx> MockExclusiveLock;
 163   typedef exclusive_lock::PreAcquireRequest<MockExclusiveLockImageCtx> MockPreAcquireRequest;
 164   typedef exclusive_lock::PostAcquireRequest<MockExclusiveLockImageCtx> MockPostAcquireRequest;
 165   typedef exclusive_lock::PreReleaseRequest<MockExclusiveLockImageCtx> MockPreReleaseRequest;
 166
 167   void expect_set_state_initializing(MockManagedLock &managed_lock) {
 168     EXPECT_CALL(managed_lock, set_state_initializing());
 169   }
 170
 171   void expect_set_state_unlocked(MockManagedLock &managed_lock) {
 172     EXPECT_CALL(managed_lock, set_state_unlocked());
 173   }
 174
 175   void expect_set_state_waiting_for_lock(MockManagedLock &managed_lock) {
 176     EXPECT_CALL(managed_lock, set_state_waiting_for_lock());
 177   }
 178
 179   void expect_is_state_acquiring(MockManagedLock &managed_lock, bool ret_val) {
 180     EXPECT_CALL(managed_lock, is_state_acquiring())
 181       .WillOnce(Return(ret_val));
 182   }
 183
 184   void expect_is_state_waiting_for_lock(MockManagedLock &managed_lock,
 185                                         bool ret_val) {
 186     EXPECT_CALL(managed_lock, is_state_waiting_for_lock())
 187       .WillOnce(Return(ret_val));
 188   }
 189
 190   void expect_is_state_pre_releasing(MockManagedLock &managed_lock,
 191                                      bool ret_val) {
 192     EXPECT_CALL(managed_lock, is_state_pre_releasing())
 193       .WillOnce(Return(ret_val));
 194   }
 195
 196   void expect_is_state_releasing(MockManagedLock &managed_lock, bool ret_val) {
 197     EXPECT_CALL(managed_lock, is_state_releasing())
 198       .WillOnce(Return(ret_val));
 199   }
 200
 201   void expect_is_state_locked(MockManagedLock &managed_lock, bool ret_val) {
 202     EXPECT_CALL(managed_lock, is_state_locked())
 203       .WillOnce(Return(ret_val));
 204   }
 205
 206   void expect_is_state_shutdown(MockManagedLock &managed_lock, bool ret_val) {
 207     EXPECT_CALL(managed_lock, is_state_shutdown())
 208       .WillOnce(Return(ret_val));
 209   }
 210
 211   void expect_is_action_acquire_lock(MockManagedLock &managed_lock,
 212                                      bool ret_val) {
 213     EXPECT_CALL(managed_lock, is_action_acquire_lock())
 214       .WillOnce(Return(ret_val));
 215   }
 216
 217   void expect_set_require_lock(MockExclusiveLockImageCtx &mock_image_ctx,
 218                                io::Direction direction, bool enabled) {
 219     EXPECT_CALL(*mock_image_ctx.io_work_queue, set_require_lock(direction,
 220                                                                 enabled));
 221   }
 222
 223   void expect_block_writes(MockExclusiveLockImageCtx &mock_image_ctx) {
 224     EXPECT_CALL(*mock_image_ctx.io_work_queue, block_writes(_))
 225                   .WillOnce(CompleteContext(0, mock_image_ctx.image_ctx->op_work_queue));
 226     if (mock_image_ctx.clone_copy_on_read ||
 227         (mock_image_ctx.features & RBD_FEATURE_JOURNALING) != 0) {
 228       expect_set_require_lock(mock_image_ctx, io::DIRECTION_BOTH, true);
 229     } else {
 230       expect_set_require_lock(mock_image_ctx, io::DIRECTION_WRITE, true);
 231     }
 232   }
 233
 234   void expect_unblock_writes(MockExclusiveLockImageCtx &mock_image_ctx) {
 235     expect_set_require_lock(mock_image_ctx, io::DIRECTION_BOTH, false);
 236     EXPECT_CALL(*mock_image_ctx.io_work_queue, unblock_writes());
 237   }
 238
 239   void expect_prepare_lock_complete(MockExclusiveLockImageCtx &mock_image_ctx) {
 240     EXPECT_CALL(*mock_image_ctx.state, handle_prepare_lock_complete());
 241   }
 242
 243   void expect_pre_acquire_request(MockPreAcquireRequest &pre_acquire_request,
 244                                   int r) {
 245     EXPECT_CALL(pre_acquire_request, send())
 246       .WillOnce(CompleteRequest(&pre_acquire_request, r));
 247   }
 248
 249   void expect_post_acquire_request(MockPostAcquireRequest &post_acquire_request,
 250                                    int r) {
 251     EXPECT_CALL(post_acquire_request, send())
 252       .WillOnce(CompleteRequest(&post_acquire_request, r));
 253   }
 254
 255   void expect_pre_release_request(MockPreReleaseRequest &pre_release_request,
 256                                   int r) {
 257     EXPECT_CALL(pre_release_request, send())
 258       .WillOnce(CompleteRequest(&pre_release_request, r));
 259   }
 260
 261   void expect_notify_request_lock(MockExclusiveLockImageCtx &mock_image_ctx,
 262                                   MockExclusiveLock &mock_exclusive_lock) {
 263     EXPECT_CALL(*mock_image_ctx.image_watcher, notify_request_lock());
 264   }
 265
 266   void expect_notify_acquired_lock(MockExclusiveLockImageCtx &mock_image_ctx) {
 267     EXPECT_CALL(*mock_image_ctx.image_watcher, notify_acquired_lock())
 268       .Times(1);
 269   }
 270
 271   void expect_notify_released_lock(MockExclusiveLockImageCtx &mock_image_ctx) {
 272     EXPECT_CALL(*mock_image_ctx.image_watcher, notify_released_lock())
 273       .Times(1);
 274   }
 275
 276   void expect_flush_notifies(MockExclusiveLockImageCtx &mock_image_ctx) {
 277     EXPECT_CALL(*mock_image_ctx.image_watcher, flush(_))
 278                   .WillOnce(CompleteContext(0, mock_image_ctx.image_ctx->op_work_queue));
 279   }
 280
 281   void expect_shut_down(MockManagedLock &managed_lock) {
 282     EXPECT_CALL(managed_lock, shut_down(_))
 283       .WillOnce(CompleteContext(0, static_cast<ContextWQ*>(nullptr)));
 284   }
 285
 286   int when_init(MockExclusiveLockImageCtx &mock_image_ctx,
 287                 MockExclusiveLock &exclusive_lock) {
 288     C_SaferCond ctx;
 289     {
 290       RWLock::WLocker owner_locker(mock_image_ctx.owner_lock);
 291       exclusive_lock.init(mock_image_ctx.features, &ctx);
 292     }
 293     return ctx.wait();
 294   }
 295
 296   int when_pre_acquire_lock_handler(MockManagedLock &managed_lock) {
 297     C_SaferCond ctx;
 298     managed_lock.pre_acquire_lock_handler(&ctx);
 299     return ctx.wait();
 300   }
 301
 302   int when_post_acquire_lock_handler(MockManagedLock &managed_lock, int r) {
 303     C_SaferCond ctx;
 304     managed_lock.post_acquire_lock_handler(r, &ctx);
 305     return ctx.wait();
 306   }
 307
 308   int when_pre_release_lock_handler(MockManagedLock &managed_lock,
 309                                     bool shutting_down) {
 310     C_SaferCond ctx;
 311     managed_lock.pre_release_lock_handler(shutting_down, &ctx);
 312     return ctx.wait();
 313   }
 314
 315   int when_post_release_lock_handler(MockManagedLock &managed_lock,
 316                                      bool shutting_down, int r) {
 317     C_SaferCond ctx;
 318     managed_lock.post_release_lock_handler(shutting_down, r, &ctx);
 319     return ctx.wait();
 320   }
 321
 322   int when_post_reacquire_lock_handler(MockManagedLock &managed_lock, int r) {
 323     C_SaferCond ctx;
 324     managed_lock.post_reacquire_lock_handler(r, &ctx);
 325     return ctx.wait();
 326   }
 327
 328   int when_shut_down(MockExclusiveLockImageCtx &mock_image_ctx,
 329                      MockExclusiveLock &exclusive_lock) {
 330     C_SaferCond ctx;
 331     {
 332       RWLock::WLocker owner_locker(mock_image_ctx.owner_lock);
 333       exclusive_lock.shut_down(&ctx);
 334     }
 335     return ctx.wait();
 336   }
 337
 338   bool is_lock_owner(MockExclusiveLockImageCtx &mock_image_ctx,
 339                      MockExclusiveLock &exclusive_lock) {
 340     RWLock::RLocker owner_locker(mock_image_ctx.owner_lock);
 341     return exclusive_lock.is_lock_owner();
 342   }
 343 };
 344
 345 TEST_F(TestMockExclusiveLock, StateTransitions) {
 346   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 347
 348   librbd::ImageCtx *ictx;
 349   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 350
 351   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 352   MockExclusiveLock exclusive_lock(mock_image_ctx);
 353   expect_op_work_queue(mock_image_ctx);
 354
 355   InSequence seq;
 356   expect_set_state_initializing(exclusive_lock);
 357   expect_block_writes(mock_image_ctx);
 358   expect_set_state_unlocked(exclusive_lock);
 359   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 360
 361   // (try) acquire lock
 362   MockPreAcquireRequest try_lock_pre_acquire;
 363   expect_pre_acquire_request(try_lock_pre_acquire, 0);
 364   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 365
 366   MockPostAcquireRequest try_lock_post_acquire;
 367   expect_post_acquire_request(try_lock_post_acquire, 0);
 368   expect_is_state_acquiring(exclusive_lock, true);
 369   expect_notify_acquired_lock(mock_image_ctx);
 370   expect_unblock_writes(mock_image_ctx);
 371   ASSERT_EQ(0, when_post_acquire_lock_handler(exclusive_lock, 0));
 372
 373   // release lock
 374   MockPreReleaseRequest pre_request_release;
 375   expect_pre_release_request(pre_request_release, 0);
 376   ASSERT_EQ(0, when_pre_release_lock_handler(exclusive_lock, false));
 377
 378   expect_is_state_pre_releasing(exclusive_lock, false);
 379   expect_is_state_releasing(exclusive_lock, true);
 380   expect_notify_released_lock(mock_image_ctx);
 381   ASSERT_EQ(0, when_post_release_lock_handler(exclusive_lock, false, 0));
 382
 383   // (try) acquire lock
 384   MockPreAcquireRequest request_lock_pre_acquire;
 385   expect_pre_acquire_request(request_lock_pre_acquire, 0);
 386   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 387
 388   MockPostAcquireRequest request_lock_post_acquire;
 389   expect_post_acquire_request(request_lock_post_acquire, 0);
 390   expect_is_state_acquiring(exclusive_lock, true);
 391   expect_notify_acquired_lock(mock_image_ctx);
 392   expect_unblock_writes(mock_image_ctx);
 393   ASSERT_EQ(0, when_post_acquire_lock_handler(exclusive_lock, 0));
 394
 395   // shut down (and release)
 396   expect_shut_down(exclusive_lock);
 397   expect_is_state_waiting_for_lock(exclusive_lock, false);
 398   ASSERT_EQ(0, when_shut_down(mock_image_ctx, exclusive_lock));
 399
 400   MockPreReleaseRequest shutdown_pre_release;
 401   expect_pre_release_request(shutdown_pre_release, 0);
 402   ASSERT_EQ(0, when_pre_release_lock_handler(exclusive_lock, true));
 403
 404   expect_unblock_writes(mock_image_ctx);
 405   expect_notify_released_lock(mock_image_ctx);
 406   ASSERT_EQ(0, when_post_release_lock_handler(exclusive_lock, true, 0));
 407 }
 408
 409 TEST_F(TestMockExclusiveLock, TryLockAlreadyLocked) {
 410   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 411
 412   librbd::ImageCtx *ictx;
 413   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 414
 415   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 416   MockExclusiveLock exclusive_lock(mock_image_ctx);
 417   expect_op_work_queue(mock_image_ctx);
 418
 419   InSequence seq;
 420   expect_set_state_initializing(exclusive_lock);
 421   expect_block_writes(mock_image_ctx);
 422   expect_set_state_unlocked(exclusive_lock);
 423   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 424
 425   // try acquire lock
 426   MockPreAcquireRequest try_lock_pre_acquire;
 427   expect_pre_acquire_request(try_lock_pre_acquire, 0);
 428   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 429
 430   expect_is_state_acquiring(exclusive_lock, true);
 431   expect_prepare_lock_complete(mock_image_ctx);
 432   expect_is_action_acquire_lock(exclusive_lock, false);
 433   ASSERT_EQ(0, when_post_acquire_lock_handler(exclusive_lock, -EAGAIN));
 434 }
 435
 436 TEST_F(TestMockExclusiveLock, TryLockError) {
 437   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 438
 439   librbd::ImageCtx *ictx;
 440   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 441
 442   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 443   MockExclusiveLock exclusive_lock(mock_image_ctx);
 444   expect_op_work_queue(mock_image_ctx);
 445
 446   InSequence seq;
 447   expect_set_state_initializing(exclusive_lock);
 448   expect_block_writes(mock_image_ctx);
 449   expect_set_state_unlocked(exclusive_lock);
 450   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 451
 452   // try acquire lock
 453   MockPreAcquireRequest try_lock_pre_acquire;
 454   expect_pre_acquire_request(try_lock_pre_acquire, 0);
 455   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 456
 457   expect_is_state_acquiring(exclusive_lock, true);
 458   expect_prepare_lock_complete(mock_image_ctx);
 459   expect_is_action_acquire_lock(exclusive_lock, false);
 460   ASSERT_EQ(-EBUSY, when_post_acquire_lock_handler(exclusive_lock, -EBUSY));
 461 }
 462
 463 TEST_F(TestMockExclusiveLock, AcquireLockAlreadyLocked) {
 464   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 465
 466   librbd::ImageCtx *ictx;
 467   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 468
 469   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 470   MockExclusiveLock exclusive_lock(mock_image_ctx);
 471   expect_op_work_queue(mock_image_ctx);
 472
 473   InSequence seq;
 474   expect_set_state_initializing(exclusive_lock);
 475   expect_block_writes(mock_image_ctx);
 476   expect_set_state_unlocked(exclusive_lock);
 477   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 478
 479   // acquire lock
 480   MockPreAcquireRequest try_lock_pre_acquire;
 481   expect_pre_acquire_request(try_lock_pre_acquire, 0);
 482   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 483
 484   expect_is_state_acquiring(exclusive_lock, true);
 485   expect_prepare_lock_complete(mock_image_ctx);
 486   expect_is_action_acquire_lock(exclusive_lock, true);
 487   expect_set_state_waiting_for_lock(exclusive_lock);
 488   expect_notify_request_lock(mock_image_ctx, exclusive_lock);
 489   ASSERT_EQ(-ECANCELED, when_post_acquire_lock_handler(exclusive_lock,
 490                                                        -EAGAIN));
 491 }
 492
 493 TEST_F(TestMockExclusiveLock, AcquireLockBusy) {
 494   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 495
 496   librbd::ImageCtx *ictx;
 497   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 498
 499   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 500   MockExclusiveLock exclusive_lock(mock_image_ctx);
 501   expect_op_work_queue(mock_image_ctx);
 502
 503   InSequence seq;
 504   expect_set_state_initializing(exclusive_lock);
 505   expect_block_writes(mock_image_ctx);
 506   expect_set_state_unlocked(exclusive_lock);
 507   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 508
 509   // acquire lock
 510   MockPreAcquireRequest try_lock_pre_acquire;
 511   expect_pre_acquire_request(try_lock_pre_acquire, 0);
 512   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 513
 514   expect_is_state_acquiring(exclusive_lock, true);
 515   expect_prepare_lock_complete(mock_image_ctx);
 516   expect_is_action_acquire_lock(exclusive_lock, true);
 517   expect_set_state_waiting_for_lock(exclusive_lock);
 518   expect_notify_request_lock(mock_image_ctx, exclusive_lock);
 519   ASSERT_EQ(-ECANCELED, when_post_acquire_lock_handler(exclusive_lock,
 520                                                        -EBUSY));
 521 }
 522
 523 TEST_F(TestMockExclusiveLock, AcquireLockError) {
 524   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 525
 526   librbd::ImageCtx *ictx;
 527   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 528
 529   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 530   MockExclusiveLock exclusive_lock(mock_image_ctx);
 531   expect_op_work_queue(mock_image_ctx);
 532
 533   InSequence seq;
 534   expect_set_state_initializing(exclusive_lock);
 535   expect_block_writes(mock_image_ctx);
 536   expect_set_state_unlocked(exclusive_lock);
 537   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 538
 539   // acquire lock
 540   MockPreAcquireRequest try_lock_pre_acquire;
 541   expect_pre_acquire_request(try_lock_pre_acquire, 0);
 542   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 543
 544   expect_is_state_acquiring(exclusive_lock, true);
 545   expect_prepare_lock_complete(mock_image_ctx);
 546   expect_is_action_acquire_lock(exclusive_lock, true);
 547   ASSERT_EQ(-EBLACKLISTED, when_post_acquire_lock_handler(exclusive_lock,
 548                                                           -EBLACKLISTED));
 549 }
 550
 551 TEST_F(TestMockExclusiveLock, PostAcquireLockError) {
 552   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 553
 554   librbd::ImageCtx *ictx;
 555   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 556
 557   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 558   MockExclusiveLock exclusive_lock(mock_image_ctx);
 559   expect_op_work_queue(mock_image_ctx);
 560
 561   InSequence seq;
 562   expect_set_state_initializing(exclusive_lock);
 563   expect_block_writes(mock_image_ctx);
 564   expect_set_state_unlocked(exclusive_lock);
 565   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 566
 567   // (try) acquire lock
 568   MockPreAcquireRequest request_lock_pre_acquire;
 569   expect_pre_acquire_request(request_lock_pre_acquire, 0);
 570   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 571
 572   MockPostAcquireRequest request_lock_post_acquire;
 573   expect_post_acquire_request(request_lock_post_acquire, -EPERM);
 574   expect_is_state_acquiring(exclusive_lock, true);
 575   ASSERT_EQ(-EPERM, when_post_acquire_lock_handler(exclusive_lock, 0));
 576 }
 577
 578 TEST_F(TestMockExclusiveLock, PreReleaseLockError) {
 579   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 580
 581   librbd::ImageCtx *ictx;
 582   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 583
 584   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 585   MockExclusiveLock exclusive_lock(mock_image_ctx);
 586   expect_op_work_queue(mock_image_ctx);
 587
 588   InSequence seq;
 589   expect_set_state_initializing(exclusive_lock);
 590   expect_block_writes(mock_image_ctx);
 591   expect_set_state_unlocked(exclusive_lock);
 592   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 593
 594   // release lock
 595   MockPreReleaseRequest pre_request_release;
 596   expect_pre_release_request(pre_request_release, -EINVAL);
 597   ASSERT_EQ(-EINVAL, when_pre_release_lock_handler(exclusive_lock, false));
 598
 599   expect_is_state_pre_releasing(exclusive_lock, true);
 600   ASSERT_EQ(-EINVAL, when_post_release_lock_handler(exclusive_lock, false,
 601                                                     -EINVAL));
 602 }
 603
 604 TEST_F(TestMockExclusiveLock, ReacquireLock) {
 605   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 606
 607   librbd::ImageCtx *ictx;
 608   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 609
 610   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 611   MockExclusiveLock exclusive_lock(mock_image_ctx);
 612   expect_op_work_queue(mock_image_ctx);
 613
 614   InSequence seq;
 615   expect_set_state_initializing(exclusive_lock);
 616   expect_block_writes(mock_image_ctx);
 617   expect_set_state_unlocked(exclusive_lock);
 618   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 619
 620   // (try) acquire lock
 621   MockPreAcquireRequest try_lock_pre_acquire;
 622   expect_pre_acquire_request(try_lock_pre_acquire, 0);
 623   ASSERT_EQ(0, when_pre_acquire_lock_handler(exclusive_lock));
 624
 625   MockPostAcquireRequest try_lock_post_acquire;
 626   expect_post_acquire_request(try_lock_post_acquire, 0);
 627   expect_is_state_acquiring(exclusive_lock, true);
 628   expect_notify_acquired_lock(mock_image_ctx);
 629   expect_unblock_writes(mock_image_ctx);
 630   ASSERT_EQ(0, when_post_acquire_lock_handler(exclusive_lock, 0));
 631
 632   // reacquire lock
 633   expect_notify_acquired_lock(mock_image_ctx);
 634   ASSERT_EQ(0, when_post_reacquire_lock_handler(exclusive_lock, 0));
 635
 636   // shut down (and release)
 637   expect_shut_down(exclusive_lock);
 638   expect_is_state_waiting_for_lock(exclusive_lock, false);
 639   ASSERT_EQ(0, when_shut_down(mock_image_ctx, exclusive_lock));
 640
 641   MockPreReleaseRequest shutdown_pre_release;
 642   expect_pre_release_request(shutdown_pre_release, 0);
 643   ASSERT_EQ(0, when_pre_release_lock_handler(exclusive_lock, true));
 644
 645   expect_unblock_writes(mock_image_ctx);
 646   expect_notify_released_lock(mock_image_ctx);
 647   ASSERT_EQ(0, when_post_release_lock_handler(exclusive_lock, true, 0));
 648 }
 649
 650 TEST_F(TestMockExclusiveLock, BlockRequests) {
 651   REQUIRE_FEATURE(RBD_FEATURE_EXCLUSIVE_LOCK);
 652
 653   librbd::ImageCtx *ictx;
 654   ASSERT_EQ(0, open_image(m_image_name, &ictx));
 655
 656   MockExclusiveLockImageCtx mock_image_ctx(*ictx);
 657   MockExclusiveLock exclusive_lock(mock_image_ctx);
 658
 659   expect_op_work_queue(mock_image_ctx);
 660
 661   InSequence seq;
 662   expect_set_state_initializing(exclusive_lock);
 663   expect_block_writes(mock_image_ctx);
 664   expect_set_state_unlocked(exclusive_lock);
 665   ASSERT_EQ(0, when_init(mock_image_ctx, exclusive_lock));
 666
 667   int ret_val;
 668   expect_is_state_shutdown(exclusive_lock, false);
 669   expect_is_state_locked(exclusive_lock, true);
 670   ASSERT_TRUE(exclusive_lock.accept_requests(&ret_val));
 671   ASSERT_EQ(0, ret_val);
 672
 673   exclusive_lock.block_requests(-EROFS);
 674   expect_is_state_shutdown(exclusive_lock, false);
 675   expect_is_state_locked(exclusive_lock, true);
 676   ASSERT_FALSE(exclusive_lock.accept_requests(&ret_val));
 677   ASSERT_EQ(-EROFS, ret_val);
 678
 679   exclusive_lock.unblock_requests();
 680   expect_is_state_shutdown(exclusive_lock, false);
 681   expect_is_state_locked(exclusive_lock, true);
 682   ASSERT_TRUE(exclusive_lock.accept_requests(&ret_val));
 683   ASSERT_EQ(0, ret_val);
 684 }
 685
 686 } // namespace librbd
 687