955e11bc28
Encapsulate file descriptor into an object, to ensure that an fd will be closed properly while exception raised, e.g., the block_cache throws exception during the block_manager's construction.
71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
// Copyright (C) 2017 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 "block-cache/block_cache.h"
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#include "test_utils.h"
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.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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TEST(BCacheTests, cleaned_on_demand)
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{
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using namespace bcache;
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unsigned const NR_BLOCKS = 16;
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temp_file tmp("bcache_t", 1);
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file_utils::file_descriptor fd(tmp.get_path().c_str(), O_RDWR | O_DIRECT);
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uint64_t bs = 8;
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block_cache bc(fd, bs, 64, (bs << SECTOR_SHIFT) * NR_BLOCKS);
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validator::ptr v(new bcache::noop_validator());
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for (unsigned i = 0; i < NR_BLOCKS; i++) {
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block_cache::block &b = bc.get(i, block_cache::GF_DIRTY | block_cache::GF_ZERO, v);
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b.put();
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}
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// Default WRITEBACK_LOW_THRESHOLD_PERCENT == 33
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// For NR_BLOCKS cache entires, only 6 dirty blocks will be submitted,
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// so the 7th get() doesn't work.
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list<block_cache::block *> blocks;
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try {
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for (unsigned i = 0; i < NR_BLOCKS; i++)
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blocks.push_back(&bc.get(NR_BLOCKS + i, 0, v));
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} catch (...) {
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for (auto b : blocks)
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b->put();
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throw;
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}
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for (auto b : blocks)
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b->put();
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}
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