439 lines
10 KiB
C++
439 lines
10 KiB
C++
// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
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//
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// thin-provisioning-tools is free software: you can redistribute it
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// and/or modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// thin-provisioning-tools is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with thin-provisioning-tools. If not, see
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// <http://www.gnu.org/licenses/>.
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#include "gmock/gmock.h"
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#include "persistent-data/block.h"
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#include "test_utils.h"
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#include <stdlib.h>
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using namespace std;
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using namespace test;
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using namespace testing;
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//----------------------------------------------------------------
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namespace {
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template <uint32_t BlockSize>
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void check_all_bytes(typename block_manager::read_ref const &rr, int v) {
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unsigned char const *data = reinterpret_cast<unsigned char const *>(rr.data());
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for (unsigned b = 0; b < BlockSize; b++)
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ASSERT_THAT(data[b], Eq(static_cast<unsigned char>(v)));
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}
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template <uint32_t BlockSize>
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struct zero_validator : public bcache::validator {
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virtual void check(void const *raw, block_address location) const {
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unsigned char const *data = reinterpret_cast<unsigned char const *>(raw);
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for (unsigned b = 0; b < BlockSize; b++)
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if (data[b] != 0)
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throw runtime_error("validator check zero");
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}
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virtual bool check_raw(void const *raw) const {
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unsigned char const *data = reinterpret_cast<unsigned char const *>(raw);
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for (unsigned b = 0; b < BlockSize; b++)
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if (data[b] != 0)
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return false;
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return true;
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}
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virtual void prepare(void *raw, block_address location) const {
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unsigned char *data = reinterpret_cast<unsigned char *>(raw);
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for (unsigned b = 0; b < BlockSize; b++)
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data[b] = 0;
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}
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};
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class validator_mock : public bcache::validator {
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public:
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typedef boost::shared_ptr<validator_mock> ptr;
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MOCK_CONST_METHOD2(check, void(void const *, block_address));
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MOCK_CONST_METHOD1(check_raw, bool(void const *data));
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MOCK_CONST_METHOD2(prepare, void(void *, block_address));
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};
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typedef block_manager bm4096;
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}
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//----------------------------------------------------------------
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TEST(BlockTests, bad_path)
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{
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ASSERT_THROW(bm4096("/bogus/bogus/bogus", 1234, 4, block_manager::READ_WRITE),
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runtime_error);
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}
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TEST(BlockTests, out_of_range_access)
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{
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bm4096::ptr bm = create_bm(1024);
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ASSERT_THROW(bm->read_lock(1024), runtime_error);
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}
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TEST(BlockTests, read_lock_all_blocks)
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{
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block_address const nr = 64;
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bm4096::ptr bm = create_bm(nr);
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for (unsigned i = 0; i < nr; i++)
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bm->read_lock(i);
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}
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TEST(BlockTests, write_lock_all_blocks)
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{
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block_address const nr = 64;
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bm4096::ptr bm = create_bm(nr);
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for (unsigned i = 0; i < nr; i++)
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bm->write_lock(i);
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}
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TEST(BlockTests, writes_persist)
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{
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block_address const nr = 64;
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bm4096::ptr bm = create_bm(nr);
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for (unsigned i = 0; i < nr; i++) {
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bm4096::write_ref wr = bm->write_lock(i);
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::memset(wr.data(), i, 4096);
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}
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for (unsigned i = 0; i < nr; i++) {
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bm4096::read_ref rr = bm->read_lock(i);
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check_all_bytes<4096>(rr, i % 256);
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}
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}
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TEST(BlockTests, write_lock_zero_zeroes)
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{
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bm4096::ptr bm = create_bm(64);
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check_all_bytes<4096>(bm->write_lock_zero(23), 0);
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}
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TEST(BlockTests, read_validator_works)
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{
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bcache::validator::ptr v(new zero_validator<4096>());
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bm4096::ptr bm = create_bm(64);
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bm->write_lock_zero(0);
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bm->read_lock(0, v);
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}
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TEST(BlockTests, write_validator_works)
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{
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bm4096::ptr bm = create_bm(64);
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bcache::validator::ptr v(new zero_validator<4096>());
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{
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bm4096::write_ref wr = bm->write_lock(0, v);
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::memset(wr.data(), 23, 4096);
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}
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bm->flush(); // force the prepare method to be called
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check_all_bytes<4096>(bm->read_lock(0), 0);
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}
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TEST(BlockTests, cannot_have_two_superblocks)
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{
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bm4096::ptr bm = create_bm();
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bm4096::write_ref superblock = bm->superblock(0);
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ASSERT_THROW(bm->superblock(1), runtime_error);
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}
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TEST(BlockTests, can_have_subsequent_superblocks)
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{
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bm4096::ptr bm = create_bm();
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{ bm4096::write_ref superblock = bm->superblock(0); }
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{ bm4096::write_ref superblock = bm->superblock(0); }
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}
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TEST(BlockTests, superblocks_can_change_address)
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{
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bm4096::ptr bm = create_bm();
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{ bm4096::write_ref superblock = bm->superblock(0); }
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{ bm4096::write_ref superblock = bm->superblock(1); }
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}
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// This test terminates with g++ 4.8.1. This is because it erroneously
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// assumes a noexcept(true) specification is present on every declared
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// destructor. Not a bad idea, but not what the standard says. Obviously
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// we really shouldn't be throwing in a destructor, but not sure what the
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// correct thing to do is (log the error? put the tm into a 'bad' state?).
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TEST(BlockTests, superblock_must_be_last)
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{
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bm4096::ptr bm = create_bm();
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{
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bm4096::read_ref rr = bm->read_lock(63);
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{
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ASSERT_THROW(bm->superblock(0), runtime_error);
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}
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}
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}
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TEST(BlockTests, references_can_be_copied)
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{
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bm4096::ptr bm = create_bm();
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bm4096::write_ref wr1 = bm->write_lock(0);
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bm4096::write_ref wr2(wr1);
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}
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TEST(BlockTests, no_concurrent_write_locks)
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{
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bm4096::ptr bm = create_bm();
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bm4096::write_ref wr = bm->write_lock(0);
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ASSERT_THROW(bm->write_lock(0), runtime_error);
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}
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TEST(BlockTests, concurrent_read_locks)
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{
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bm4096::ptr bm = create_bm();
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bm4096::read_ref rr = bm->read_lock(0);
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bm->read_lock(0);
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}
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#if 0
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// FIXME: commenting this out. With the Scheme rewrite in progress I don't
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// think I'm ever going to add the extra checking to the C++ code.
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TEST(BlockTests, no_concurrent_read_and_write_locks)
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{
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bm4096::ptr bm = create_bm();
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bm4096::write_ref wr = bm->write_lock(0);
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ASSERT_THROW(bm->read_lock(0), runtime_error);
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}
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#endif
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TEST(BlockTests, read_then_write)
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{
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bm4096::ptr bm = create_bm();
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bm->read_lock(0);
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bm->write_lock(0);
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}
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TEST(BlockTests, write_then_read)
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{
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bm4096::ptr bm = create_bm();
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bm->write_lock(0);
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bm->read_lock(0);
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}
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//----------------------------------------------------------------
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namespace {
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class ValidatorTests : public Test {
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public:
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ValidatorTests()
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: bm(create_bm()),
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vmock(new validator_mock),
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vmock2(new validator_mock) {
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}
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void expect_check(validator_mock::ptr v) {
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EXPECT_CALL(*v, check(_, Eq(0ull))).Times(1);
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}
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void expect_no_check(validator_mock::ptr v) {
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EXPECT_CALL(*v, check(_, Eq(0ull))).Times(0);
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}
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void expect_prepare(validator_mock::ptr v) {
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EXPECT_CALL(*v, prepare(_, Eq(0ull))).Times(1);
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}
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bm4096::ptr bm;
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validator_mock::ptr vmock;
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validator_mock::ptr vmock2;
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};
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class my_error : public runtime_error {
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public:
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my_error(string const &msg)
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: runtime_error(msg) {
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}
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};
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}
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//--------------------------------
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TEST_F(ValidatorTests, check_on_read_lock)
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{
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expect_check(vmock);
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bm4096::read_ref rr = bm->read_lock(0, vmock);
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}
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TEST_F(ValidatorTests, check_only_called_once_on_read_lock)
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{
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{
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expect_check(vmock);
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bm4096::read_ref rr = bm->read_lock(0, vmock);
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}
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expect_no_check(vmock);
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bm4096::read_ref rr = bm->read_lock(0, vmock);
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}
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TEST_F(ValidatorTests, validator_can_be_changed_by_read_lock)
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{
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{
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expect_check(vmock);
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bm4096::read_ref rr = bm->read_lock(0, vmock);
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}
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{
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expect_no_check(vmock);
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expect_check(vmock2);
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bm4096::read_ref rr = bm->read_lock(0, vmock2);
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}
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}
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//--------------------------------
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TEST_F(ValidatorTests, check_and_prepare_on_write_lock)
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{
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expect_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->write_lock(0, vmock);
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}
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TEST_F(ValidatorTests, check_only_called_once_on_write_lock)
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{
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{
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expect_check(vmock);
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bm4096::write_ref wr = bm->write_lock(0, vmock);
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}
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expect_no_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->write_lock(0, vmock);
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}
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TEST_F(ValidatorTests, validator_can_be_changed_by_write_lock)
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{
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{
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expect_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->write_lock(0, vmock);
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}
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{
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expect_check(vmock2);
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expect_prepare(vmock2);
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bm4096::write_ref wr = bm->write_lock(0, vmock2);
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}
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}
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//--------------------------------
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TEST_F(ValidatorTests, no_check_but_prepare_on_write_lock_zero)
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{
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expect_no_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->write_lock_zero(0, vmock);
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}
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TEST_F(ValidatorTests, validator_can_be_changed_by_write_lock_zero)
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{
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{
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expect_no_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->write_lock_zero(0, vmock);
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}
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// We need to flush to ensure the vmock->prepare has occurred
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bm->flush();
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expect_no_check(vmock2);
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expect_prepare(vmock2);
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bm4096::write_ref wr = bm->write_lock_zero(0, vmock2);
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}
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//--------------------------------
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TEST_F(ValidatorTests, check_and_prepare_on_superblock_lock)
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{
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expect_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->superblock(0, vmock);
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}
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TEST_F(ValidatorTests, check_only_called_once_on_superblock_lock)
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{
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{
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expect_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->superblock(0, vmock);
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}
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expect_no_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->superblock(0, vmock);
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}
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TEST_F(ValidatorTests, validator_can_be_changed_by_superblock_lock)
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{
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{
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expect_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->write_lock(0, vmock);
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}
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{
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expect_no_check(vmock);
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expect_check(vmock2);
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expect_prepare(vmock2);
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bm4096::write_ref wr = bm->write_lock(0, vmock2);
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}
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}
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//--------------------------------
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TEST_F(ValidatorTests, no_check_but_prepare_on_superblock_lock_zero)
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{
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expect_no_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->superblock_zero(0, vmock);
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}
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TEST_F(ValidatorTests, validator_can_be_changed_by_superblock_zero)
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{
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{
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expect_no_check(vmock);
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expect_prepare(vmock);
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bm4096::write_ref wr = bm->superblock_zero(0, vmock);
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}
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expect_no_check(vmock2);
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expect_prepare(vmock2);
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bm4096::write_ref wr = bm->superblock_zero(0, vmock2);
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}
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//--------------------------------
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TEST_F(ValidatorTests, validator_check_failure_gets_passed_up)
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{
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validator_mock::ptr v(new validator_mock);
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EXPECT_CALL(*v, check(_, Eq(0ull))).Times(1).WillOnce(Throw(my_error("bang!")));
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ASSERT_THROW(bm->read_lock(0, v), my_error);
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// FIXME: put this back in
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//ASSERT_FALSE(bm->is_locked(0));
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}
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//----------------------------------------------------------------
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