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333 lines
13 KiB
333 lines
13 KiB
/*
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* Copyright (C) 2017 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 "devices.h"
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#include <android-base/file.h>
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#include <android-base/scopeguard.h>
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#include <gtest/gtest.h>
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#include "util.h"
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using namespace std::string_literals;
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namespace android {
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namespace init {
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class DeviceHandlerTester {
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public:
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void TestGetSymlinks(const std::string& platform_device, const Uevent& uevent,
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const std::vector<std::string>& expected_links) {
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TemporaryDir fake_sys_root;
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device_handler_.sysfs_mount_point_ = fake_sys_root.path;
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std::string platform_device_dir = fake_sys_root.path + platform_device;
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mkdir_recursive(platform_device_dir, 0777);
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std::string platform_bus = fake_sys_root.path + "/bus/platform"s;
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mkdir_recursive(platform_bus, 0777);
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symlink(platform_bus.c_str(), (platform_device_dir + "/subsystem").c_str());
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mkdir_recursive(android::base::Dirname(fake_sys_root.path + uevent.path), 0777);
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std::vector<std::string> result;
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result = device_handler_.GetBlockDeviceSymlinks(uevent);
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auto expected_size = expected_links.size();
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ASSERT_EQ(expected_size, result.size());
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if (expected_size == 0) return;
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// Explicitly iterate so the results are visible if a failure occurs
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for (unsigned int i = 0; i < expected_size; ++i) {
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EXPECT_EQ(expected_links[i], result[i]);
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}
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}
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private:
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DeviceHandler device_handler_;
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};
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TEST(device_handler, get_block_device_symlinks_success_platform) {
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// These are actual paths from bullhead
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const char* platform_device = "/devices/soc.0/f9824900.sdhci";
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Uevent uevent = {
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.path = "/devices/soc.0/f9824900.sdhci/mmc_host/mmc0/mmc0:0001/block/mmcblk0",
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.partition_name = "",
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.partition_num = -1,
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};
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std::vector<std::string> expected_result{"/dev/block/platform/soc.0/f9824900.sdhci/mmcblk0"};
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, get_block_device_symlinks_success_platform_with_partition) {
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// These are actual paths from bullhead
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const char* platform_device = "/devices/soc.0/f9824900.sdhci";
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Uevent uevent = {
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.path = "/devices/soc.0/f9824900.sdhci/mmc_host/mmc0/mmc0:0001/block/mmcblk0p1",
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.partition_name = "modem",
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.partition_num = 1,
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};
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std::vector<std::string> expected_result{
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"/dev/block/platform/soc.0/f9824900.sdhci/by-name/modem",
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"/dev/block/platform/soc.0/f9824900.sdhci/mmcblk0p1",
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};
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, get_block_device_symlinks_success_platform_with_partition_only_num) {
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const char* platform_device = "/devices/soc.0/f9824900.sdhci";
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Uevent uevent = {
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.path = "/devices/soc.0/f9824900.sdhci/mmc_host/mmc0/mmc0:0001/block/mmcblk0p1",
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.partition_name = "",
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.partition_num = 1,
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};
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std::vector<std::string> expected_result{
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"/dev/block/platform/soc.0/f9824900.sdhci/mmcblk0p1",
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};
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, get_block_device_symlinks_success_platform_with_partition_only_name) {
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const char* platform_device = "/devices/soc.0/f9824900.sdhci";
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Uevent uevent = {
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.path = "/devices/soc.0/f9824900.sdhci/mmc_host/mmc0/mmc0:0001/block/mmcblk0p1",
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.partition_name = "modem",
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.partition_num = -1,
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};
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std::vector<std::string> expected_result{
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"/dev/block/platform/soc.0/f9824900.sdhci/by-name/modem",
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"/dev/block/platform/soc.0/f9824900.sdhci/mmcblk0p1",
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};
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, get_block_device_symlinks_success_pci) {
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const char* platform_device = "/devices/do/not/match";
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Uevent uevent = {
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.path = "/devices/pci0000:00/0000:00:1f.2/mmcblk0", .partition_name = "", .partition_num = -1,
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};
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std::vector<std::string> expected_result{"/dev/block/pci/pci0000:00/0000:00:1f.2/mmcblk0"};
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, get_block_device_symlinks_pci_bad_format) {
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const char* platform_device = "/devices/do/not/match";
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Uevent uevent = {
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.path = "/devices/pci//mmcblk0", .partition_name = "", .partition_num = -1,
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};
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std::vector<std::string> expected_result{};
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, get_block_device_symlinks_success_vbd) {
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const char* platform_device = "/devices/do/not/match";
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Uevent uevent = {
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.path = "/devices/vbd-1234/mmcblk0", .partition_name = "", .partition_num = -1,
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};
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std::vector<std::string> expected_result{"/dev/block/vbd/1234/mmcblk0"};
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, get_block_device_symlinks_vbd_bad_format) {
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const char* platform_device = "/devices/do/not/match";
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Uevent uevent = {
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.path = "/devices/vbd-/mmcblk0", .partition_name = "", .partition_num = -1,
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};
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std::vector<std::string> expected_result{};
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, get_block_device_symlinks_no_matches) {
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const char* platform_device = "/devices/soc.0/f9824900.sdhci";
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Uevent uevent = {
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.path = "/devices/soc.0/not_the_device/mmc_host/mmc0/mmc0:0001/block/mmcblk0p1",
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.partition_name = "",
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.partition_num = -1,
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};
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std::vector<std::string> expected_result;
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DeviceHandlerTester device_handler_tester_;
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device_handler_tester_.TestGetSymlinks(platform_device, uevent, expected_result);
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}
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TEST(device_handler, sanitize_null) {
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SanitizePartitionName(nullptr);
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}
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TEST(device_handler, sanitize_empty) {
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std::string empty;
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SanitizePartitionName(&empty);
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EXPECT_EQ(0u, empty.size());
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}
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TEST(device_handler, sanitize_allgood) {
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std::string good =
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"abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"0123456789"
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"_-.";
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std::string good_copy = good;
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SanitizePartitionName(&good);
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EXPECT_EQ(good_copy, good);
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}
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TEST(device_handler, sanitize_somebad) {
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std::string string = "abc!@#$%^&*()";
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SanitizePartitionName(&string);
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EXPECT_EQ("abc__________", string);
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}
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TEST(device_handler, sanitize_allbad) {
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std::string string = "!@#$%^&*()";
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SanitizePartitionName(&string);
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EXPECT_EQ("__________", string);
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}
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TEST(device_handler, sanitize_onebad) {
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std::string string = ")";
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SanitizePartitionName(&string);
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EXPECT_EQ("_", string);
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}
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TEST(device_handler, DevPermissionsMatchNormal) {
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// Basic from ueventd.rc
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// /dev/null 0666 root root
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Permissions permissions("/dev/null", 0666, 0, 0, false);
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EXPECT_TRUE(permissions.Match("/dev/null"));
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EXPECT_FALSE(permissions.Match("/dev/nullsuffix"));
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EXPECT_FALSE(permissions.Match("/dev/nul"));
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EXPECT_EQ(0666U, permissions.perm());
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EXPECT_EQ(0U, permissions.uid());
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EXPECT_EQ(0U, permissions.gid());
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}
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TEST(device_handler, DevPermissionsMatchPrefix) {
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// Prefix from ueventd.rc
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// /dev/dri/* 0666 root graphics
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Permissions permissions("/dev/dri/*", 0666, 0, 1000, false);
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EXPECT_TRUE(permissions.Match("/dev/dri/some_dri_device"));
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EXPECT_TRUE(permissions.Match("/dev/dri/some_other_dri_device"));
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EXPECT_TRUE(permissions.Match("/dev/dri/"));
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EXPECT_FALSE(permissions.Match("/dev/dr/non_match"));
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EXPECT_EQ(0666U, permissions.perm());
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EXPECT_EQ(0U, permissions.uid());
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EXPECT_EQ(1000U, permissions.gid());
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}
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TEST(device_handler, DevPermissionsMatchWildcard) {
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// Wildcard example
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// /dev/device*name 0666 root graphics
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Permissions permissions("/dev/device*name", 0666, 0, 1000, false);
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EXPECT_TRUE(permissions.Match("/dev/devicename"));
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EXPECT_TRUE(permissions.Match("/dev/device123name"));
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EXPECT_TRUE(permissions.Match("/dev/deviceabcname"));
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EXPECT_FALSE(permissions.Match("/dev/device123name/subdevice"));
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EXPECT_FALSE(permissions.Match("/dev/deviceame"));
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EXPECT_EQ(0666U, permissions.perm());
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EXPECT_EQ(0U, permissions.uid());
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EXPECT_EQ(1000U, permissions.gid());
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}
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TEST(device_handler, DevPermissionsMatchWildcardPrefix) {
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// Wildcard+Prefix example
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// /dev/device*name* 0666 root graphics
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Permissions permissions("/dev/device*name*", 0666, 0, 1000, false);
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EXPECT_TRUE(permissions.Match("/dev/devicename"));
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EXPECT_TRUE(permissions.Match("/dev/device123name"));
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EXPECT_TRUE(permissions.Match("/dev/deviceabcname"));
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EXPECT_TRUE(permissions.Match("/dev/device123namesomething"));
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// FNM_PATHNAME doesn't match '/' with *
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EXPECT_FALSE(permissions.Match("/dev/device123name/something"));
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EXPECT_FALSE(permissions.Match("/dev/device/1/2/3name/something"));
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EXPECT_FALSE(permissions.Match("/dev/deviceame"));
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EXPECT_EQ(0666U, permissions.perm());
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EXPECT_EQ(0U, permissions.uid());
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EXPECT_EQ(1000U, permissions.gid());
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}
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TEST(device_handler, DevPermissionsMatchWildcardPrefix_NoFnmPathName) {
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// Wildcard+Prefix example with no_fnm_pathname
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// /dev/device*name* 0666 root graphics
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Permissions permissions("/dev/device*name*", 0666, 0, 1000, true);
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EXPECT_TRUE(permissions.Match("/dev/devicename"));
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EXPECT_TRUE(permissions.Match("/dev/device123name"));
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EXPECT_TRUE(permissions.Match("/dev/deviceabcname"));
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EXPECT_TRUE(permissions.Match("/dev/device123namesomething"));
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// With NoFnmPathName, the below matches, unlike DevPermissionsMatchWildcardPrefix.
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EXPECT_TRUE(permissions.Match("/dev/device123name/something"));
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EXPECT_TRUE(permissions.Match("/dev/device/1/2/3name/something"));
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EXPECT_FALSE(permissions.Match("/dev/deviceame"));
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EXPECT_EQ(0666U, permissions.perm());
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EXPECT_EQ(0U, permissions.uid());
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EXPECT_EQ(1000U, permissions.gid());
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}
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TEST(device_handler, SysfsPermissionsMatchWithSubsystemNormal) {
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// /sys/devices/virtual/input/input* enable 0660 root input
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SysfsPermissions permissions("/sys/devices/virtual/input/input*", "enable", 0660, 0, 1001,
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false);
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EXPECT_TRUE(permissions.MatchWithSubsystem("/sys/devices/virtual/input/input0", "input"));
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EXPECT_FALSE(permissions.MatchWithSubsystem("/sys/devices/virtual/input/not_input0", "input"));
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EXPECT_EQ(0660U, permissions.perm());
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EXPECT_EQ(0U, permissions.uid());
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EXPECT_EQ(1001U, permissions.gid());
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}
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TEST(device_handler, SysfsPermissionsMatchWithSubsystemClass) {
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// /sys/class/input/event* enable 0660 root input
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SysfsPermissions permissions("/sys/class/input/event*", "enable", 0660, 0, 1001, false);
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EXPECT_TRUE(permissions.MatchWithSubsystem(
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"/sys/devices/soc.0/f9924000.i2c/i2c-2/2-0020/input/input0/event0", "input"));
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EXPECT_FALSE(permissions.MatchWithSubsystem(
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"/sys/devices/soc.0/f9924000.i2c/i2c-2/2-0020/input/input0/not_event0", "input"));
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EXPECT_FALSE(permissions.MatchWithSubsystem(
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"/sys/devices/soc.0/f9924000.i2c/i2c-2/2-0020/input/input0/event0", "not_input"));
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EXPECT_EQ(0660U, permissions.perm());
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EXPECT_EQ(0U, permissions.uid());
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EXPECT_EQ(1001U, permissions.gid());
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}
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TEST(device_handler, SysfsPermissionsMatchWithSubsystemBus) {
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// /sys/bus/i2c/devices/i2c-* enable 0660 root input
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SysfsPermissions permissions("/sys/bus/i2c/devices/i2c-*", "enable", 0660, 0, 1001, false);
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EXPECT_TRUE(permissions.MatchWithSubsystem("/sys/devices/soc.0/f9967000.i2c/i2c-5", "i2c"));
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EXPECT_FALSE(permissions.MatchWithSubsystem("/sys/devices/soc.0/f9967000.i2c/not-i2c", "i2c"));
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EXPECT_FALSE(
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permissions.MatchWithSubsystem("/sys/devices/soc.0/f9967000.i2c/i2c-5", "not_i2c"));
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EXPECT_EQ(0660U, permissions.perm());
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EXPECT_EQ(0U, permissions.uid());
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EXPECT_EQ(1001U, permissions.gid());
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}
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} // namespace init
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} // namespace android
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