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/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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 <stdint.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <chrono>
#include <ctime>
#include <map>
#include <thread>
#include <android-base/file.h>
#include <android-base/unique_fd.h>
#include <gtest/gtest.h>
#include <libdm/dm.h>
#include <libdm/loop_control.h>
#include "test_util.h"
using namespace std;
using namespace android::dm;
using unique_fd = android::base::unique_fd;
TEST(libdm, HasMinimumTargets) {
DeviceMapper& dm = DeviceMapper::Instance();
vector<DmTargetTypeInfo> targets;
ASSERT_TRUE(dm.GetAvailableTargets(&targets));
map<string, DmTargetTypeInfo> by_name;
for (const auto& target : targets) {
by_name[target.name()] = target;
}
auto iter = by_name.find("linear");
EXPECT_NE(iter, by_name.end());
}
// Helper to ensure that device mapper devices are released.
class TempDevice {
public:
TempDevice(const std::string& name, const DmTable& table)
: dm_(DeviceMapper::Instance()), name_(name), valid_(false) {
valid_ = dm_.CreateDevice(name, table);
}
TempDevice(TempDevice&& other) noexcept
: dm_(other.dm_), name_(other.name_), valid_(other.valid_) {
other.valid_ = false;
}
~TempDevice() {
if (valid_) {
dm_.DeleteDevice(name_);
}
}
bool Destroy() {
if (!valid_) {
return false;
}
valid_ = false;
return dm_.DeleteDevice(name_);
}
bool WaitForUdev() const {
auto start_time = std::chrono::steady_clock::now();
while (true) {
if (!access(path().c_str(), F_OK)) {
return true;
}
if (errno != ENOENT) {
return false;
}
std::this_thread::sleep_for(50ms);
std::chrono::duration elapsed = std::chrono::steady_clock::now() - start_time;
if (elapsed >= 5s) {
return false;
}
}
}
std::string path() const {
std::string device_path;
if (!dm_.GetDmDevicePathByName(name_, &device_path)) {
return "";
}
return device_path;
}
const std::string& name() const { return name_; }
bool valid() const { return valid_; }
TempDevice(const TempDevice&) = delete;
TempDevice& operator=(const TempDevice&) = delete;
TempDevice& operator=(TempDevice&& other) noexcept {
name_ = other.name_;
valid_ = other.valid_;
other.valid_ = false;
return *this;
}
private:
DeviceMapper& dm_;
std::string name_;
bool valid_;
};
TEST(libdm, DmLinear) {
unique_fd tmp1(CreateTempFile("file_1", 4096));
ASSERT_GE(tmp1, 0);
unique_fd tmp2(CreateTempFile("file_2", 4096));
ASSERT_GE(tmp2, 0);
// Create two different files. These will back two separate loop devices.
const char message1[] = "Hello! This is sector 1.";
const char message2[] = "Goodbye. This is sector 2.";
ASSERT_TRUE(android::base::WriteFully(tmp1, message1, sizeof(message1)));
ASSERT_TRUE(android::base::WriteFully(tmp2, message2, sizeof(message2)));
LoopDevice loop_a(tmp1);
ASSERT_TRUE(loop_a.valid());
LoopDevice loop_b(tmp2);
ASSERT_TRUE(loop_b.valid());
// Define a 2-sector device, with each sector mapping to the first sector
// of one of our loop devices.
DmTable table;
ASSERT_TRUE(table.AddTarget(make_unique<DmTargetLinear>(0, 1, loop_a.device(), 0)));
ASSERT_TRUE(table.AddTarget(make_unique<DmTargetLinear>(1, 1, loop_b.device(), 0)));
ASSERT_TRUE(table.valid());
TempDevice dev("libdm-test-dm-linear", table);
ASSERT_TRUE(dev.valid());
ASSERT_FALSE(dev.path().empty());
ASSERT_TRUE(dev.WaitForUdev());
// Note: a scope is needed to ensure that there are no open descriptors
// when we go to close the device.
{
unique_fd dev_fd(open(dev.path().c_str(), O_RDWR));
ASSERT_GE(dev_fd, 0);
// Test that each sector of our device is correctly mapped to each loop
// device.
char sector[512];
ASSERT_TRUE(android::base::ReadFully(dev_fd, sector, sizeof(sector)));
ASSERT_EQ(strncmp(sector, message1, sizeof(message1)), 0);
ASSERT_TRUE(android::base::ReadFully(dev_fd, sector, sizeof(sector)));
ASSERT_EQ(strncmp(sector, message2, sizeof(message2)), 0);
}
// Test GetTableStatus.
DeviceMapper& dm = DeviceMapper::Instance();
vector<DeviceMapper::TargetInfo> targets;
ASSERT_TRUE(dm.GetTableStatus(dev.name(), &targets));
ASSERT_EQ(targets.size(), 2);
EXPECT_EQ(strcmp(targets[0].spec.target_type, "linear"), 0);
EXPECT_TRUE(targets[0].data.empty());
EXPECT_EQ(targets[0].spec.sector_start, 0);
EXPECT_EQ(targets[0].spec.length, 1);
EXPECT_EQ(strcmp(targets[1].spec.target_type, "linear"), 0);
EXPECT_TRUE(targets[1].data.empty());
EXPECT_EQ(targets[1].spec.sector_start, 1);
EXPECT_EQ(targets[1].spec.length, 1);
// Normally the TestDevice destructor would delete this, but at least one
// test should ensure that device deletion works.
ASSERT_TRUE(dev.Destroy());
}
TEST(libdm, DmVerityArgsAvb2) {
std::string device = "/dev/block/platform/soc/1da4000.ufshc/by-name/vendor_a";
std::string algorithm = "sha1";
std::string digest = "4be7e823b8c40f7bd5c8ccd5123f0722c5baca21";
std::string salt = "cc99f81ecb9484220a003b0719ee59dcf9be7e5d";
DmTargetVerity target(0, 10000, 1, device, device, 4096, 4096, 125961, 125961, algorithm,
digest, salt);
target.UseFec(device, 2, 126955, 126955);
target.SetVerityMode("restart_on_corruption");
target.IgnoreZeroBlocks();
// Verity table from a walleye build.
std::string expected =
"1 /dev/block/platform/soc/1da4000.ufshc/by-name/vendor_a "
"/dev/block/platform/soc/1da4000.ufshc/by-name/vendor_a 4096 4096 125961 125961 sha1 "
"4be7e823b8c40f7bd5c8ccd5123f0722c5baca21 cc99f81ecb9484220a003b0719ee59dcf9be7e5d 10 "
"use_fec_from_device /dev/block/platform/soc/1da4000.ufshc/by-name/vendor_a fec_roots "
"2 fec_blocks 126955 fec_start 126955 restart_on_corruption ignore_zero_blocks";
EXPECT_EQ(target.GetParameterString(), expected);
}
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