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// Copyright 2021 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <fcntl.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <unistd.h>
#include <memory>
#include <string>
#include <vector>
#include "gtest/gtest.h"
#include "benchmark/benchmark.h"
#include "test/util/capability_util.h"
#include "test/util/fs_util.h"
#include "test/util/logging.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
#include "test/util/verity_util.h"
namespace gvisor {
namespace testing {
namespace {
void BM_VerityRead(benchmark::State& state) {
const int size = state.range(0);
const std::string contents(size, 0);
// Mount a tmpfs file system to be wrapped by a verity fs.
TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
TEST_CHECK(mount("", dir.path().c_str(), "tmpfs", 0, "") == 0);
auto path = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
dir.path(), contents, TempPath::kDefaultFileMode));
std::string filename = std::string(Basename(path.path()));
std::string verity_dir = TEST_CHECK_NO_ERRNO_AND_VALUE(
MountVerity(dir.path(), {EnableTarget(filename, O_RDONLY)}));
FileDescriptor fd =
ASSERT_NO_ERRNO_AND_VALUE(Open(JoinPath(verity_dir, filename), O_RDONLY));
std::vector<char> buf(size);
for (auto _ : state) {
TEST_CHECK(PreadFd(fd.get(), buf.data(), buf.size(), 0) == size);
}
state.SetBytesProcessed(static_cast<int64_t>(size) *
static_cast<int64_t>(state.iterations()));
}
BENCHMARK(BM_VerityRead)->Range(1, 1 << 26)->UseRealTime();
} // namespace
} // namespace testing
} // namespace gvisor
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