/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <array>
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#include <cstdio>
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#include <fstream>
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#include <string>
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#include <android-base/properties.h>
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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namespace android {
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namespace kernel {
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class KernelLoopConfigTest : public ::testing::Test {
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protected:
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const int first_api_level_;
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KernelLoopConfigTest()
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: first_api_level_(std::stoi(
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android::base::GetProperty("ro.product.first_api_level", "0"))) {}
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bool should_run() const {
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// TODO replace with the proper Q constant once known, and check for
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// APEX support as well (for upgrading devices)
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return first_api_level_ >= 29;
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}
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};
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TEST_F(KernelLoopConfigTest, ValidLoopConfig) {
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if (!should_run()) return;
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static constexpr const char* kCmd =
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"zcat /proc/config.gz | grep CONFIG_BLK_DEV_LOOP_MIN_COUNT";
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std::array<char, 256> line;
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std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(kCmd, "r"), pclose);
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ASSERT_NE(pipe, nullptr);
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auto read = fgets(line.data(), line.size(), pipe.get());
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ASSERT_NE(read, nullptr);
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auto minCountStr = std::string(read);
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auto pos = minCountStr.find("=");
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ASSERT_NE(pos, std::string::npos);
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ASSERT_GE(minCountStr.length(), pos + 1);
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int minCountValue = std::stoi(minCountStr.substr(pos + 1));
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ASSERT_GE(minCountValue, 16);
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}
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TEST_F(KernelLoopConfigTest, ValidLoopParameters) {
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if (!should_run()) return;
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std::ifstream max_loop("/sys/module/loop/parameters/max_loop");
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std::ifstream max_part("/sys/module/loop/parameters/max_part");
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std::string max_loop_str;
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std::string max_part_str;
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std::getline(max_loop, max_loop_str);
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std::getline(max_part, max_part_str);
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int max_part_value = std::stoi(max_part_str);
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EXPECT_LE(max_part_value, 7);
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int max_loop_value = std::stoi(max_loop_str);
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EXPECT_EQ(0, max_loop_value);
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}
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} // namespace kernel
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} // namespace android
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