libsnaphot: Refactor cow_snapuserd test
Refact cow_snapuserd unit test. This will test code changes in daemon in isolation. Currently it tests 1: Reading snapshot device and validate data 2: Merge and validate data. More tests related to merge will be added later; but this should provide a baseline unit test for daemon. BUG: 168311203 Test: cow_snapuserd_test Signed-off-by: Akilesh Kailash <akailash@google.com> Change-Id: I4d77c435a9f045204a4ff3ece524c857f9fba50f
This commit is contained in:
Akilesh Kailash
parent
03f4504ffd
commit
333639e952
3 changed files with 297 additions and 342 deletions
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@ -563,6 +563,7 @@ cc_test {
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"libsnapshot_snapuserd",
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"libcutils_sockets",
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"libz",
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"libfs_mgr",
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"libdm",
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],
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header_libs: [
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@ -12,10 +12,14 @@
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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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#include <fcntl.h>
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#include <linux/fs.h>
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#include <linux/memfd.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <chrono>
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#include <iostream>
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@ -24,7 +28,9 @@
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#include <android-base/file.h>
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#include <android-base/unique_fd.h>
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#include <fs_mgr/file_wait.h>
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#include <gtest/gtest.h>
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#include <libdm/dm.h>
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#include <libdm/loop_control.h>
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#include <libsnapshot/cow_writer.h>
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#include <libsnapshot/snapuserd_client.h>
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@ -37,111 +43,203 @@ using namespace android::storage_literals;
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using android::base::unique_fd;
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using LoopDevice = android::dm::LoopDevice;
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using namespace std::chrono_literals;
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using namespace android::dm;
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using namespace std;
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class SnapuserdTest : public ::testing::Test {
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protected:
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void SetUp() override {
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// TODO: Daemon started through first stage
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// init does not have permission to read files
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// from /data/nativetest.
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system("setenforce 0");
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cow_system_ = std::make_unique<TemporaryFile>();
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ASSERT_GE(cow_system_->fd, 0) << strerror(errno);
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static constexpr char kSnapuserdSocketTest[] = "snapuserdTest";
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cow_product_ = std::make_unique<TemporaryFile>();
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ASSERT_GE(cow_product_->fd, 0) << strerror(errno);
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class TempDevice {
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public:
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TempDevice(const std::string& name, const DmTable& table)
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: dm_(DeviceMapper::Instance()), name_(name), valid_(false) {
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valid_ = dm_.CreateDevice(name, table, &path_, std::chrono::seconds(5));
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}
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TempDevice(TempDevice&& other) noexcept
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: dm_(other.dm_), name_(other.name_), path_(other.path_), valid_(other.valid_) {
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other.valid_ = false;
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}
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~TempDevice() {
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if (valid_) {
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dm_.DeleteDevice(name_);
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}
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}
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bool Destroy() {
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if (!valid_) {
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return false;
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}
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valid_ = false;
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return dm_.DeleteDevice(name_);
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}
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const std::string& path() const { return path_; }
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const std::string& name() const { return name_; }
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bool valid() const { return valid_; }
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cow_system_1_ = std::make_unique<TemporaryFile>();
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ASSERT_GE(cow_system_1_->fd, 0) << strerror(errno);
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TempDevice(const TempDevice&) = delete;
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TempDevice& operator=(const TempDevice&) = delete;
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cow_product_1_ = std::make_unique<TemporaryFile>();
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ASSERT_GE(cow_product_1_->fd, 0) << strerror(errno);
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std::string path = android::base::GetExecutableDirectory();
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system_a_ = std::make_unique<TemporaryFile>(path);
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ASSERT_GE(system_a_->fd, 0) << strerror(errno);
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product_a_ = std::make_unique<TemporaryFile>(path);
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ASSERT_GE(product_a_->fd, 0) << strerror(errno);
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size_ = 100_MiB;
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TempDevice& operator=(TempDevice&& other) noexcept {
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name_ = other.name_;
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valid_ = other.valid_;
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other.valid_ = false;
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return *this;
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}
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void TearDown() override {
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system("setenforce 1");
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cow_system_ = nullptr;
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cow_product_ = nullptr;
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cow_system_1_ = nullptr;
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cow_product_1_ = nullptr;
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}
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std::unique_ptr<TemporaryFile> system_a_;
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std::unique_ptr<TemporaryFile> product_a_;
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std::unique_ptr<LoopDevice> system_a_loop_;
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std::unique_ptr<LoopDevice> product_a_loop_;
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std::unique_ptr<TemporaryFile> cow_system_;
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std::unique_ptr<TemporaryFile> cow_product_;
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std::unique_ptr<TemporaryFile> cow_system_1_;
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std::unique_ptr<TemporaryFile> cow_product_1_;
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unique_fd sys_fd_;
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unique_fd product_fd_;
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size_t size_;
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int system_blksize_;
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int product_blksize_;
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std::string system_device_name_;
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std::string product_device_name_;
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std::string system_device_ctrl_name_;
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std::string product_device_ctrl_name_;
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std::unique_ptr<uint8_t[]> random_buffer_1_;
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std::unique_ptr<uint8_t[]> random_buffer_2_;
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std::unique_ptr<uint8_t[]> zero_buffer_;
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std::unique_ptr<uint8_t[]> system_buffer_;
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std::unique_ptr<uint8_t[]> product_buffer_;
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void Init();
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void InitCowDevices();
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void InitDaemon();
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void CreateCowDevice(std::unique_ptr<TemporaryFile>& cow);
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void CreateSystemDmUser(std::unique_ptr<TemporaryFile>& cow);
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void CreateProductDmUser(std::unique_ptr<TemporaryFile>& cow);
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void DeleteDmUser(std::unique_ptr<TemporaryFile>& cow, std::string snapshot_device);
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void StartSnapuserdDaemon();
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void CreateSnapshotDevices();
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void SwitchSnapshotDevices();
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std::string GetSystemControlPath() {
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return std::string("/dev/dm-user/") + system_device_ctrl_name_;
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}
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std::string GetProductControlPath() {
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return std::string("/dev/dm-user/") + product_device_ctrl_name_;
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}
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void TestIO(unique_fd& snapshot_fd, std::unique_ptr<uint8_t[]>& buffer);
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std::unique_ptr<SnapuserdClient> client_;
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private:
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DeviceMapper& dm_;
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std::string name_;
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std::string path_;
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bool valid_;
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};
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void SnapuserdTest::Init() {
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class CowSnapuserdTest final {
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public:
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bool Setup();
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bool Merge();
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void ValidateMerge();
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void ReadSnapshotDeviceAndValidate();
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void Shutdown();
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std::string snapshot_dev() const { return snapshot_dev_->path(); }
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static const uint64_t kSectorSize = 512;
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private:
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void SetupImpl();
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void MergeImpl();
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void CreateCowDevice();
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void CreateBaseDevice();
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void InitCowDevice();
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void SetDeviceControlName();
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void InitDaemon();
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void CreateDmUserDevice();
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void StartSnapuserdDaemon();
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void CreateSnapshotDevice();
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unique_fd CreateTempFile(const std::string& name, size_t size);
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unique_ptr<LoopDevice> base_loop_;
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unique_ptr<TempDevice> dmuser_dev_;
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unique_ptr<TempDevice> snapshot_dev_;
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std::string system_device_ctrl_name_;
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std::string system_device_name_;
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unique_fd base_fd_;
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std::unique_ptr<TemporaryFile> cow_system_;
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std::unique_ptr<SnapuserdClient> client_;
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std::unique_ptr<uint8_t[]> orig_buffer_;
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std::unique_ptr<uint8_t[]> merged_buffer_;
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bool setup_ok_ = false;
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bool merge_ok_ = false;
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size_t size_ = 1_MiB;
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int cow_num_sectors_;
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int total_base_size_;
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};
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unique_fd CowSnapuserdTest::CreateTempFile(const std::string& name, size_t size) {
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unique_fd fd(syscall(__NR_memfd_create, name.c_str(), MFD_ALLOW_SEALING));
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if (fd < 0) {
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return {};
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}
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if (size) {
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if (ftruncate(fd, size) < 0) {
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perror("ftruncate");
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return {};
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}
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if (fcntl(fd, F_ADD_SEALS, F_SEAL_GROW | F_SEAL_SHRINK) < 0) {
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perror("fcntl");
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return {};
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}
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}
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return fd;
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}
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void CowSnapuserdTest::Shutdown() {
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ASSERT_TRUE(client_->StopSnapuserd());
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ASSERT_TRUE(snapshot_dev_->Destroy());
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ASSERT_TRUE(dmuser_dev_->Destroy());
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}
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bool CowSnapuserdTest::Setup() {
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SetupImpl();
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return setup_ok_;
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}
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void CowSnapuserdTest::StartSnapuserdDaemon() {
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pid_t pid = fork();
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ASSERT_GE(pid, 0);
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if (pid == 0) {
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std::string arg0 = "/system/bin/snapuserd";
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std::string arg1 = kSnapuserdSocketTest;
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char* const argv[] = {arg0.data(), arg1.data(), nullptr};
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ASSERT_GE(execv(arg0.c_str(), argv), 0);
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} else {
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client_ = SnapuserdClient::Connect(kSnapuserdSocketTest, 10s);
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ASSERT_NE(client_, nullptr);
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}
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}
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void CowSnapuserdTest::CreateBaseDevice() {
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unique_fd rnd_fd;
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loff_t offset = 0;
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std::unique_ptr<uint8_t[]> random_buffer = std::make_unique<uint8_t[]>(1_MiB);
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total_base_size_ = (size_ * 4);
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base_fd_ = CreateTempFile("base_device", total_base_size_);
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ASSERT_GE(base_fd_, 0);
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rnd_fd.reset(open("/dev/random", O_RDONLY));
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ASSERT_TRUE(rnd_fd > 0);
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random_buffer_1_ = std::make_unique<uint8_t[]>(size_);
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random_buffer_2_ = std::make_unique<uint8_t[]>(size_);
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system_buffer_ = std::make_unique<uint8_t[]>(size_);
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product_buffer_ = std::make_unique<uint8_t[]>(size_);
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zero_buffer_ = std::make_unique<uint8_t[]>(size_);
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std::unique_ptr<uint8_t[]> random_buffer = std::make_unique<uint8_t[]>(1_MiB);
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for (size_t j = 0; j < ((total_base_size_) / 1_MiB); j++) {
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ASSERT_EQ(ReadFullyAtOffset(rnd_fd, (char*)random_buffer.get(), 1_MiB, 0), true);
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ASSERT_EQ(android::base::WriteFully(base_fd_, random_buffer.get(), 1_MiB), true);
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}
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ASSERT_EQ(lseek(base_fd_, 0, SEEK_SET), 0);
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base_loop_ = std::make_unique<LoopDevice>(base_fd_, 10s);
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ASSERT_TRUE(base_loop_->valid());
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}
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void CowSnapuserdTest::ReadSnapshotDeviceAndValidate() {
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unique_fd snapshot_fd(open(snapshot_dev_->path().c_str(), O_RDONLY));
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ASSERT_TRUE(snapshot_fd > 0);
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std::unique_ptr<uint8_t[]> snapuserd_buffer = std::make_unique<uint8_t[]>(size_);
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// COPY
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loff_t offset = 0;
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ASSERT_EQ(ReadFullyAtOffset(snapshot_fd, snapuserd_buffer.get(), size_, offset), true);
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ASSERT_EQ(memcmp(snapuserd_buffer.get(), orig_buffer_.get(), size_), 0);
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// REPLACE
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offset += size_;
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ASSERT_EQ(ReadFullyAtOffset(snapshot_fd, snapuserd_buffer.get(), size_, offset), true);
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ASSERT_EQ(memcmp(snapuserd_buffer.get(), (char*)orig_buffer_.get() + size_, size_), 0);
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// ZERO
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offset += size_;
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ASSERT_EQ(ReadFullyAtOffset(snapshot_fd, snapuserd_buffer.get(), size_, offset), true);
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ASSERT_EQ(memcmp(snapuserd_buffer.get(), (char*)orig_buffer_.get() + (size_ * 2), size_), 0);
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// REPLACE
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offset += size_;
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ASSERT_EQ(ReadFullyAtOffset(snapshot_fd, snapuserd_buffer.get(), size_, offset), true);
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ASSERT_EQ(memcmp(snapuserd_buffer.get(), (char*)orig_buffer_.get() + (size_ * 3), size_), 0);
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}
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void CowSnapuserdTest::CreateCowDevice() {
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unique_fd rnd_fd;
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loff_t offset = 0;
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std::string path = android::base::GetExecutableDirectory();
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cow_system_ = std::make_unique<TemporaryFile>(path);
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rnd_fd.reset(open("/dev/random", O_RDONLY));
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ASSERT_TRUE(rnd_fd > 0);
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std::unique_ptr<uint8_t[]> random_buffer_1_ = std::make_unique<uint8_t[]>(size_);
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std::unique_ptr<uint8_t[]> random_buffer_2_ = std::make_unique<uint8_t[]>(size_);
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// Fill random data
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for (size_t j = 0; j < (size_ / 1_MiB); j++) {
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@ -154,77 +252,32 @@ void SnapuserdTest::Init() {
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offset += 1_MiB;
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}
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for (size_t j = 0; j < (800_MiB / 1_MiB); j++) {
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ASSERT_EQ(ReadFullyAtOffset(rnd_fd, (char*)random_buffer.get(), 1_MiB, 0), true);
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ASSERT_EQ(android::base::WriteFully(system_a_->fd, random_buffer.get(), 1_MiB), true);
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}
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for (size_t j = 0; j < (800_MiB / 1_MiB); j++) {
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ASSERT_EQ(ReadFullyAtOffset(rnd_fd, (char*)random_buffer.get(), 1_MiB, 0), true);
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ASSERT_EQ(android::base::WriteFully(product_a_->fd, random_buffer.get(), 1_MiB), true);
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}
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// Create loopback devices
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system_a_loop_ = std::make_unique<LoopDevice>(std::string(system_a_->path), 10s);
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ASSERT_TRUE(system_a_loop_->valid());
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product_a_loop_ = std::make_unique<LoopDevice>(std::string(product_a_->path), 10s);
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ASSERT_TRUE(product_a_loop_->valid());
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sys_fd_.reset(open(system_a_loop_->device().c_str(), O_RDONLY));
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ASSERT_TRUE(sys_fd_ > 0);
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product_fd_.reset(open(product_a_loop_->device().c_str(), O_RDONLY));
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ASSERT_TRUE(product_fd_ > 0);
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// Read from system partition from offset 0 of size 100MB
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ASSERT_EQ(ReadFullyAtOffset(sys_fd_, system_buffer_.get(), size_, 0), true);
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// Read from product partition from offset 0 of size 100MB
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ASSERT_EQ(ReadFullyAtOffset(product_fd_, product_buffer_.get(), size_, 0), true);
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}
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void SnapuserdTest::CreateCowDevice(std::unique_ptr<TemporaryFile>& cow) {
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//================Create a COW file with the following operations===========
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//
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// Create COW file which is gz compressed
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//
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// 0-100 MB of replace operation with random data
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// 100-200 MB of copy operation
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// 200-300 MB of zero operation
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// 300-400 MB of replace operation with random data
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CowOptions options;
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options.compression = "gz";
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CowWriter writer(options);
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ASSERT_TRUE(writer.Initialize(cow->fd));
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// Write 100MB random data to COW file which is gz compressed from block 0
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ASSERT_TRUE(writer.AddRawBlocks(0, random_buffer_1_.get(), size_));
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ASSERT_TRUE(writer.Initialize(cow_system_->fd));
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size_t num_blocks = size_ / options.block_size;
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size_t blk_start_copy = num_blocks;
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size_t blk_end_copy = blk_start_copy + num_blocks;
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size_t blk_src_copy = num_blocks;
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size_t blk_end_copy = blk_src_copy + num_blocks;
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size_t source_blk = 0;
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// Copy blocks - source_blk starts from 0 as snapuserd
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// has to read from block 0 in system_a partition
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//
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// This initializes copy operation from block 0 of size 100 MB from
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// /dev/block/mapper/system_a or product_a
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for (size_t i = blk_start_copy; i < blk_end_copy; i++) {
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ASSERT_TRUE(writer.AddCopy(i, source_blk));
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while (source_blk < num_blocks) {
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ASSERT_TRUE(writer.AddCopy(source_blk, blk_src_copy));
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source_blk += 1;
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blk_src_copy += 1;
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}
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size_t blk_zero_copy_start = blk_end_copy;
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ASSERT_EQ(blk_src_copy, blk_end_copy);
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ASSERT_TRUE(writer.AddRawBlocks(source_blk, random_buffer_1_.get(), size_));
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size_t blk_zero_copy_start = source_blk + num_blocks;
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size_t blk_zero_copy_end = blk_zero_copy_start + num_blocks;
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// 100 MB filled with zeroes
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ASSERT_TRUE(writer.AddZeroBlocks(blk_zero_copy_start, num_blocks));
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// Final 100MB filled with random data which is gz compressed
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size_t blk_random2_replace_start = blk_zero_copy_end;
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ASSERT_TRUE(writer.AddRawBlocks(blk_random2_replace_start, random_buffer_2_.get(), size_));
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@ -232,233 +285,133 @@ void SnapuserdTest::CreateCowDevice(std::unique_ptr<TemporaryFile>& cow) {
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// Flush operations
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ASSERT_TRUE(writer.Finalize());
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ASSERT_EQ(lseek(cow->fd, 0, SEEK_SET), 0);
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// Construct the buffer required for validation
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orig_buffer_ = std::make_unique<uint8_t[]>(total_base_size_);
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std::string zero_buffer(size_, 0);
|
||||
|
||||
ASSERT_EQ(android::base::ReadFullyAtOffset(base_fd_, orig_buffer_.get(), size_, size_), true);
|
||||
memcpy((char*)orig_buffer_.get() + size_, random_buffer_1_.get(), size_);
|
||||
memcpy((char*)orig_buffer_.get() + (size_ * 2), (void*)zero_buffer.c_str(), size_);
|
||||
memcpy((char*)orig_buffer_.get() + (size_ * 3), random_buffer_2_.get(), size_);
|
||||
}
|
||||
|
||||
void SnapuserdTest::CreateSystemDmUser(std::unique_ptr<TemporaryFile>& cow) {
|
||||
std::string cmd;
|
||||
void CowSnapuserdTest::InitCowDevice() {
|
||||
cow_num_sectors_ = client_->InitDmUserCow(system_device_ctrl_name_, cow_system_->path,
|
||||
base_loop_->device());
|
||||
ASSERT_NE(cow_num_sectors_, 0);
|
||||
}
|
||||
|
||||
void CowSnapuserdTest::SetDeviceControlName() {
|
||||
system_device_name_.clear();
|
||||
system_device_ctrl_name_.clear();
|
||||
|
||||
std::string str(cow->path);
|
||||
std::string str(cow_system_->path);
|
||||
std::size_t found = str.find_last_of("/\\");
|
||||
ASSERT_NE(found, std::string::npos);
|
||||
system_device_name_ = str.substr(found + 1);
|
||||
|
||||
// Create a control device
|
||||
system_device_ctrl_name_ = system_device_name_ + "-ctrl";
|
||||
cmd = "dmctl create " + system_device_name_ + " user 0 " + std::to_string(system_blksize_);
|
||||
cmd += " " + system_device_ctrl_name_;
|
||||
|
||||
system(cmd.c_str());
|
||||
}
|
||||
|
||||
void SnapuserdTest::DeleteDmUser(std::unique_ptr<TemporaryFile>& cow, std::string snapshot_device) {
|
||||
std::string cmd;
|
||||
void CowSnapuserdTest::CreateDmUserDevice() {
|
||||
DmTable dmuser_table;
|
||||
ASSERT_TRUE(dmuser_table.AddTarget(
|
||||
std::make_unique<DmTargetUser>(0, cow_num_sectors_, system_device_ctrl_name_)));
|
||||
ASSERT_TRUE(dmuser_table.valid());
|
||||
|
||||
cmd = "dmctl delete " + snapshot_device;
|
||||
system(cmd.c_str());
|
||||
dmuser_dev_ = std::make_unique<TempDevice>(system_device_name_, dmuser_table);
|
||||
ASSERT_TRUE(dmuser_dev_->valid());
|
||||
ASSERT_FALSE(dmuser_dev_->path().empty());
|
||||
|
||||
cmd.clear();
|
||||
|
||||
std::string str(cow->path);
|
||||
std::size_t found = str.find_last_of("/\\");
|
||||
ASSERT_NE(found, std::string::npos);
|
||||
std::string device_name = str.substr(found + 1);
|
||||
|
||||
cmd = "dmctl delete " + device_name;
|
||||
|
||||
system(cmd.c_str());
|
||||
auto misc_device = "/dev/dm-user/" + system_device_ctrl_name_;
|
||||
ASSERT_TRUE(android::fs_mgr::WaitForFile(misc_device, 10s));
|
||||
}
|
||||
|
||||
void SnapuserdTest::CreateProductDmUser(std::unique_ptr<TemporaryFile>& cow) {
|
||||
std::string cmd;
|
||||
product_device_name_.clear();
|
||||
product_device_ctrl_name_.clear();
|
||||
|
||||
std::string str(cow->path);
|
||||
std::size_t found = str.find_last_of("/\\");
|
||||
ASSERT_NE(found, std::string::npos);
|
||||
product_device_name_ = str.substr(found + 1);
|
||||
product_device_ctrl_name_ = product_device_name_ + "-ctrl";
|
||||
cmd = "dmctl create " + product_device_name_ + " user 0 " + std::to_string(product_blksize_);
|
||||
cmd += " " + product_device_ctrl_name_;
|
||||
|
||||
system(cmd.c_str());
|
||||
}
|
||||
|
||||
void SnapuserdTest::InitCowDevices() {
|
||||
system_blksize_ = client_->InitDmUserCow(system_device_ctrl_name_, cow_system_->path,
|
||||
system_a_loop_->device());
|
||||
ASSERT_NE(system_blksize_, 0);
|
||||
|
||||
product_blksize_ = client_->InitDmUserCow(product_device_ctrl_name_, cow_product_->path,
|
||||
product_a_loop_->device());
|
||||
ASSERT_NE(product_blksize_, 0);
|
||||
}
|
||||
|
||||
void SnapuserdTest::InitDaemon() {
|
||||
void CowSnapuserdTest::InitDaemon() {
|
||||
bool ok = client_->AttachDmUser(system_device_ctrl_name_);
|
||||
ASSERT_TRUE(ok);
|
||||
|
||||
ok = client_->AttachDmUser(product_device_ctrl_name_);
|
||||
ASSERT_TRUE(ok);
|
||||
}
|
||||
|
||||
void SnapuserdTest::StartSnapuserdDaemon() {
|
||||
ASSERT_TRUE(EnsureSnapuserdStarted());
|
||||
void CowSnapuserdTest::CreateSnapshotDevice() {
|
||||
DmTable snap_table;
|
||||
ASSERT_TRUE(snap_table.AddTarget(std::make_unique<DmTargetSnapshot>(
|
||||
0, total_base_size_ / kSectorSize, base_loop_->device(), dmuser_dev_->path(),
|
||||
SnapshotStorageMode::Persistent, 8)));
|
||||
ASSERT_TRUE(snap_table.valid());
|
||||
|
||||
client_ = SnapuserdClient::Connect(kSnapuserdSocket, 5s);
|
||||
ASSERT_NE(client_, nullptr);
|
||||
snap_table.set_readonly(true);
|
||||
|
||||
snapshot_dev_ = std::make_unique<TempDevice>("cowsnapuserd-test-dm-snapshot", snap_table);
|
||||
ASSERT_TRUE(snapshot_dev_->valid());
|
||||
ASSERT_FALSE(snapshot_dev_->path().empty());
|
||||
}
|
||||
|
||||
void SnapuserdTest::CreateSnapshotDevices() {
|
||||
std::string cmd;
|
||||
void CowSnapuserdTest::SetupImpl() {
|
||||
CreateBaseDevice();
|
||||
CreateCowDevice();
|
||||
|
||||
cmd = "dmctl create system-snapshot -ro snapshot 0 " + std::to_string(system_blksize_);
|
||||
cmd += " " + system_a_loop_->device();
|
||||
cmd += " /dev/block/mapper/" + system_device_name_;
|
||||
cmd += " P 8";
|
||||
|
||||
system(cmd.c_str());
|
||||
|
||||
cmd.clear();
|
||||
|
||||
cmd = "dmctl create product-snapshot -ro snapshot 0 " + std::to_string(product_blksize_);
|
||||
cmd += " " + product_a_loop_->device();
|
||||
cmd += " /dev/block/mapper/" + product_device_name_;
|
||||
cmd += " P 8";
|
||||
|
||||
system(cmd.c_str());
|
||||
}
|
||||
|
||||
void SnapuserdTest::SwitchSnapshotDevices() {
|
||||
std::string cmd;
|
||||
|
||||
cmd = "dmctl create system-snapshot-1 -ro snapshot 0 " + std::to_string(system_blksize_);
|
||||
cmd += " " + system_a_loop_->device();
|
||||
cmd += " /dev/block/mapper/" + system_device_name_;
|
||||
cmd += " P 8";
|
||||
|
||||
system(cmd.c_str());
|
||||
|
||||
cmd.clear();
|
||||
|
||||
cmd = "dmctl create product-snapshot-1 -ro snapshot 0 " + std::to_string(product_blksize_);
|
||||
cmd += " " + product_a_loop_->device();
|
||||
cmd += " /dev/block/mapper/" + product_device_name_;
|
||||
cmd += " P 8";
|
||||
|
||||
system(cmd.c_str());
|
||||
}
|
||||
|
||||
void SnapuserdTest::TestIO(unique_fd& snapshot_fd, std::unique_ptr<uint8_t[]>& buffer) {
|
||||
loff_t offset = 0;
|
||||
// std::unique_ptr<uint8_t[]> buffer = std::move(buf);
|
||||
|
||||
std::unique_ptr<uint8_t[]> snapuserd_buffer = std::make_unique<uint8_t[]>(size_);
|
||||
|
||||
//================Start IO operation on dm-snapshot device=================
|
||||
// This will test the following paths:
|
||||
//
|
||||
// 1: IO path for all three operations and interleaving of operations.
|
||||
// 2: Merging of blocks in kernel during metadata read
|
||||
// 3: Bulk IO issued by kernel duing merge operation
|
||||
|
||||
// Read from snapshot device of size 100MB from offset 0. This tests the
|
||||
// 1st replace operation.
|
||||
//
|
||||
// IO path:
|
||||
//
|
||||
// dm-snap->dm-snap-persistent->dm-user->snapuserd->read_compressed_cow (replace
|
||||
// op)->decompress_cow->return
|
||||
|
||||
ASSERT_EQ(ReadFullyAtOffset(snapshot_fd, snapuserd_buffer.get(), size_, offset), true);
|
||||
|
||||
// Update the offset
|
||||
offset += size_;
|
||||
|
||||
// Compare data with random_buffer_1_.
|
||||
ASSERT_EQ(memcmp(snapuserd_buffer.get(), random_buffer_1_.get(), size_), 0);
|
||||
|
||||
// Clear the buffer
|
||||
memset(snapuserd_buffer.get(), 0, size_);
|
||||
|
||||
// Read from snapshot device of size 100MB from offset 100MB. This tests the
|
||||
// copy operation.
|
||||
//
|
||||
// IO path:
|
||||
//
|
||||
// dm-snap->dm-snap-persistent->dm-user->snapuserd->read_from_(system_a/product_a) partition
|
||||
// (copy op) -> return
|
||||
ASSERT_EQ(ReadFullyAtOffset(snapshot_fd, snapuserd_buffer.get(), size_, offset), true);
|
||||
|
||||
// Update the offset
|
||||
offset += size_;
|
||||
|
||||
// Compare data with buffer.
|
||||
ASSERT_EQ(memcmp(snapuserd_buffer.get(), buffer.get(), size_), 0);
|
||||
|
||||
// Read from snapshot device of size 100MB from offset 200MB. This tests the
|
||||
// zero operation.
|
||||
//
|
||||
// IO path:
|
||||
//
|
||||
// dm-snap->dm-snap-persistent->dm-user->snapuserd->fill_memory_with_zero
|
||||
// (zero op) -> return
|
||||
ASSERT_EQ(ReadFullyAtOffset(snapshot_fd, snapuserd_buffer.get(), size_, offset), true);
|
||||
|
||||
// Compare data with zero filled buffer
|
||||
ASSERT_EQ(memcmp(snapuserd_buffer.get(), zero_buffer_.get(), size_), 0);
|
||||
|
||||
// Update the offset
|
||||
offset += size_;
|
||||
|
||||
// Read from snapshot device of size 100MB from offset 300MB. This tests the
|
||||
// final replace operation.
|
||||
//
|
||||
// IO path:
|
||||
//
|
||||
// dm-snap->dm-snap-persistent->dm-user->snapuserd->read_compressed_cow (replace
|
||||
// op)->decompress_cow->return
|
||||
ASSERT_EQ(ReadFullyAtOffset(snapshot_fd, snapuserd_buffer.get(), size_, offset), true);
|
||||
|
||||
// Compare data with random_buffer_2_.
|
||||
ASSERT_EQ(memcmp(snapuserd_buffer.get(), random_buffer_2_.get(), size_), 0);
|
||||
}
|
||||
|
||||
TEST_F(SnapuserdTest, ReadWrite) {
|
||||
unique_fd snapshot_fd;
|
||||
|
||||
Init();
|
||||
|
||||
CreateCowDevice(cow_system_);
|
||||
CreateCowDevice(cow_product_);
|
||||
SetDeviceControlName();
|
||||
|
||||
StartSnapuserdDaemon();
|
||||
InitCowDevices();
|
||||
|
||||
CreateSystemDmUser(cow_system_);
|
||||
CreateProductDmUser(cow_product_);
|
||||
InitCowDevice();
|
||||
|
||||
CreateDmUserDevice();
|
||||
InitDaemon();
|
||||
|
||||
CreateSnapshotDevices();
|
||||
CreateSnapshotDevice();
|
||||
setup_ok_ = true;
|
||||
}
|
||||
|
||||
snapshot_fd.reset(open("/dev/block/mapper/system-snapshot", O_RDONLY));
|
||||
ASSERT_TRUE(snapshot_fd > 0);
|
||||
TestIO(snapshot_fd, system_buffer_);
|
||||
bool CowSnapuserdTest::Merge() {
|
||||
MergeImpl();
|
||||
return merge_ok_;
|
||||
}
|
||||
|
||||
snapshot_fd.reset(open("/dev/block/mapper/product-snapshot", O_RDONLY));
|
||||
ASSERT_TRUE(snapshot_fd > 0);
|
||||
TestIO(snapshot_fd, product_buffer_);
|
||||
void CowSnapuserdTest::MergeImpl() {
|
||||
DmTable merge_table;
|
||||
ASSERT_TRUE(merge_table.AddTarget(std::make_unique<DmTargetSnapshot>(
|
||||
0, total_base_size_ / kSectorSize, base_loop_->device(), dmuser_dev_->path(),
|
||||
SnapshotStorageMode::Merge, 8)));
|
||||
ASSERT_TRUE(merge_table.valid());
|
||||
ASSERT_EQ(total_base_size_ / kSectorSize, merge_table.num_sectors());
|
||||
|
||||
snapshot_fd.reset(-1);
|
||||
DeviceMapper& dm = DeviceMapper::Instance();
|
||||
ASSERT_TRUE(dm.LoadTableAndActivate("cowsnapuserd-test-dm-snapshot", merge_table));
|
||||
|
||||
DeleteDmUser(cow_system_, "system-snapshot");
|
||||
DeleteDmUser(cow_product_, "product-snapshot");
|
||||
while (true) {
|
||||
vector<DeviceMapper::TargetInfo> status;
|
||||
ASSERT_TRUE(dm.GetTableStatus("cowsnapuserd-test-dm-snapshot", &status));
|
||||
ASSERT_EQ(status.size(), 1);
|
||||
ASSERT_EQ(strncmp(status[0].spec.target_type, "snapshot-merge", strlen("snapshot-merge")),
|
||||
0);
|
||||
|
||||
ASSERT_TRUE(client_->StopSnapuserd());
|
||||
DmTargetSnapshot::Status merge_status;
|
||||
ASSERT_TRUE(DmTargetSnapshot::ParseStatusText(status[0].data, &merge_status));
|
||||
ASSERT_TRUE(merge_status.error.empty());
|
||||
if (merge_status.sectors_allocated == merge_status.metadata_sectors) {
|
||||
break;
|
||||
}
|
||||
|
||||
std::this_thread::sleep_for(250ms);
|
||||
}
|
||||
|
||||
merge_ok_ = true;
|
||||
}
|
||||
|
||||
void CowSnapuserdTest::ValidateMerge() {
|
||||
merged_buffer_ = std::make_unique<uint8_t[]>(total_base_size_);
|
||||
ASSERT_EQ(android::base::ReadFullyAtOffset(base_fd_, merged_buffer_.get(), total_base_size_, 0),
|
||||
true);
|
||||
ASSERT_EQ(memcmp(merged_buffer_.get(), orig_buffer_.get(), total_base_size_), 0);
|
||||
}
|
||||
|
||||
TEST(Snapuserd_Test, Snapshot) {
|
||||
CowSnapuserdTest harness;
|
||||
ASSERT_TRUE(harness.Setup());
|
||||
harness.ReadSnapshotDeviceAndValidate();
|
||||
ASSERT_TRUE(harness.Merge());
|
||||
harness.ValidateMerge();
|
||||
harness.Shutdown();
|
||||
}
|
||||
|
||||
} // namespace snapshot
|
||||
|
|
|
|||
|
|
@ -57,7 +57,7 @@ bool EnsureSnapuserdStarted() {
|
|||
SnapuserdClient::SnapuserdClient(android::base::unique_fd&& sockfd) : sockfd_(std::move(sockfd)) {}
|
||||
|
||||
static inline bool IsRetryErrno() {
|
||||
return errno == ECONNREFUSED || errno == EINTR;
|
||||
return errno == ECONNREFUSED || errno == EINTR || errno == ENOENT;
|
||||
}
|
||||
|
||||
std::unique_ptr<SnapuserdClient> SnapuserdClient::Connect(const std::string& socket_name,
|
||||
|
|
@ -112,6 +112,7 @@ bool SnapuserdClient::ValidateConnection() {
|
|||
}
|
||||
|
||||
bool SnapuserdClient::Sendmsg(const std::string& msg) {
|
||||
LOG(DEBUG) << "Sendmsg: msg " << msg << " sockfd: " << sockfd_;
|
||||
ssize_t numBytesSent = TEMP_FAILURE_RETRY(send(sockfd_, msg.data(), msg.size(), 0));
|
||||
if (numBytesSent < 0) {
|
||||
PLOG(ERROR) << "Send failed";
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue