def test_recovery_flush_reset_fs(cache_mode, fs):
"""
title: Recovery after reset during cache flushing - test on filesystem.
description: |
Verify that unflushed data can be safely recovered, when reset was pressed during
data flushing on filesystem.
pass_criteria:
- CAS recovers successfully after reboot
- No data corruption
"""
with TestRun.step("Prepare cache and core devices."):
cache_disk = TestRun.disks['cache']
core_disk = TestRun.disks['core']
cache_disk.create_partitions([Size(2, Unit.GibiByte)])
core_disk.create_partitions([Size(16, Unit.GibiByte)] * 2)
cache_device = cache_disk.partitions[0]
core_device = core_disk.partitions[0]
core_device_link = core_device.get_device_link("/dev/disk/by-id")
cache_device_link = cache_device.get_device_link("/dev/disk/by-id")
with TestRun.step(f"Create {fs} filesystem on core."):
core_device.create_filesystem(fs)
with TestRun.step("Create test files."):
source_file, target_file = create_test_files(test_file_size)
with TestRun.step("Setup cache and add core."):
cache = casadm.start_cache(cache_device, cache_mode)
Udev.disable()
core = cache.add_core(core_device)
cache.set_cleaning_policy(CleaningPolicy.nop)
cache.set_seq_cutoff_policy(SeqCutOffPolicy.never)
with TestRun.step("Mount CAS device."):
core.mount(mount_point)
with TestRun.step("Copy file to CAS."):
copy_file(source=source_file.full_path,
target=os.path.join(mount_point, "source_test_file"),
size=test_file_size,
direct="oflag")
with TestRun.step("Unmount CAS device."):
core.unmount()
with TestRun.step("Trigger flush."):
TestRun.executor.run_in_background(
cli.flush_cache_cmd(f"{cache.cache_id}"))
with TestRun.step("Hard reset DUT during data flushing."):
power_cycle_dut(True, core_device)
cache_device.path = cache_device_link.get_target()
core_device.path = core_device_link.get_target()
with TestRun.step("Load cache."):
cache = casadm.load_cache(cache_device)
if cache.get_dirty_blocks() == Size.zero():
TestRun.fail("There are no dirty blocks on cache device.")
with TestRun.step("Stop cache with dirty data flush."):
core_writes_before = core_device.get_io_stats().sectors_written
cache.stop()
if core_writes_before >= core_device.get_io_stats().sectors_written:
TestRun.fail(
"No data was flushed after stopping cache started with load option."
)
with TestRun.step("Mount core device."):
core_device.mount(mount_point)
with TestRun.step(
"Copy test file from core device to temporary location. "
"Compare it with the first version – they should be the same."):
copy_file(source=os.path.join(mount_point, "source_test_file"),
target=target_file.full_path,
size=test_file_size,
direct="iflag")
compare_files(source_file, target_file)
with TestRun.step("Unmount core device and remove test files."):
core_device.unmount()
target_file.remove()
source_file.remove()
Udev.enable()
def test_recovery_flush_reset_raw(cache_mode):
"""
title: Recovery after reset during cache flushing - test on raw device.
description: |
Verify that unflushed data can be safely recovered, when reset was pressed during
data flushing on raw device.
pass_criteria:
- CAS recovers successfully after reboot
- No data corruption
"""
with TestRun.step("Prepare cache and core devices."):
cache_disk = TestRun.disks['cache']
core_disk = TestRun.disks['core']
cache_disk.create_partitions([Size(2, Unit.GibiByte)])
core_disk.create_partitions([Size(16, Unit.GibiByte)] * 2)
cache_device = cache_disk.partitions[0]
core_device = core_disk.partitions[0]
core_device_link = core_device.get_device_link("/dev/disk/by-id")
cache_device_link = cache_device.get_device_link("/dev/disk/by-id")
with TestRun.step("Create test files."):
source_file, target_file = create_test_files(test_file_size)
with TestRun.step("Setup cache and add core."):
cache = casadm.start_cache(cache_device, cache_mode)
core = cache.add_core(core_device)
cache.set_cleaning_policy(CleaningPolicy.nop)
cache.set_seq_cutoff_policy(SeqCutOffPolicy.never)
with TestRun.step("Copy file to CAS."):
copy_file(source=source_file.full_path,
target=core.path,
size=test_file_size,
direct="oflag")
with TestRun.step("Sync and flush buffers."):
os_utils.sync()
output = TestRun.executor.run(f"hdparm -f {core.path}")
if output.exit_code != 0:
raise CmdException("Error during hdparm", output)
with TestRun.step("Trigger flush."):
TestRun.executor.run_in_background(
cli.flush_cache_cmd(f"{cache.cache_id}"))
with TestRun.step("Hard reset DUT during data flushing."):
power_cycle_dut(wait_for_flush_begin=True, core_device=core_device)
cache_device.path = cache_device_link.get_target()
core_device.path = core_device_link.get_target()
with TestRun.step(
"Copy file from core and check if current md5sum is different than "
"before restart."):
copy_file(source=core_device_link.get_target(),
target=target_file.full_path,
size=test_file_size,
direct="iflag")
compare_files(source_file, target_file, should_differ=True)
with TestRun.step("Load cache."):
cache = casadm.load_cache(cache_device)
if cache.get_dirty_blocks() == Size.zero():
TestRun.fail("There are no dirty blocks on cache device.")
with TestRun.step("Stop cache with dirty data flush."):
core_writes_before = core_device.get_io_stats().sectors_written
cache.stop()
if core_writes_before >= core_device.get_io_stats().sectors_written:
TestRun.fail(
"No data was flushed after stopping cache started with load option."
)
with TestRun.step(
"Copy test file from core device to temporary location. "
"Compare it with the first version – they should be the same."):
copy_file(source=core_device_link.get_target(),
target=target_file.full_path,
size=test_file_size,
direct="iflag")
compare_files(source_file, target_file)
with TestRun.step("Cleanup core device and remove test files."):
target_file.remove()
source_file.remove()
def test_recovery_all_options(cache_mode, cache_line_size, cleaning_policy,
filesystem):
"""
title: Test for recovery after reset with various cache options.
description: Verify that unflushed data can be safely recovered after reset.
pass_criteria:
- CAS recovers successfully after reboot
- No data corruption
"""
with TestRun.step("Prepare cache and core devices."):
cache_disk = TestRun.disks['cache']
core_disk = TestRun.disks['core']
cache_disk.create_partitions([Size(200, Unit.MebiByte)])
core_disk.create_partitions([Size(2000, Unit.MebiByte)] * 2)
cache_device = cache_disk.partitions[0]
core_device = core_disk.partitions[0]
test_file = File(os.path.join(mount_point, filename))
file_operation(test_file.full_path, pattern, ReadWrite.write)
file_md5 = test_file.md5sum()
with TestRun.step(f"Make {filesystem} on core device."):
core_device.create_filesystem(filesystem)
with TestRun.step("Mount core device."):
core_device.mount(mount_point)
file_operation(test_file.full_path, other_pattern, ReadWrite.write)
os_utils.drop_caches(DropCachesMode.ALL)
with TestRun.step("Unmount core device."):
core_device.unmount()
with TestRun.step(
f"Start cache in {cache_mode.name} with given configuration."):
cache = casadm.start_cache(cache_device,
cache_mode,
cache_line_size,
force=True)
cache.set_cleaning_policy(cleaning_policy)
if cleaning_policy == CleaningPolicy.acp:
cache.set_params_acp(
FlushParametersAcp(wake_up_time=Time(seconds=1)))
with TestRun.step("Add core."):
core = cache.add_core(core_device)
with TestRun.step("Mount CAS device."):
core.mount(mount_point)
file_operation(test_file.full_path, pattern, ReadWrite.write)
with TestRun.step(
"Change cache mode to Write-Through without flush option."):
cache.set_cache_mode(CacheMode.WT, flush=False)
with TestRun.step("Reset platform."):
os_utils.sync()
core.unmount()
TestRun.LOGGER.info(
f"Number of dirty blocks in cache: {cache.get_dirty_blocks()}")
power_cycle_dut()
with TestRun.step("Try to start cache without load and force option."):
try:
casadm.start_cache(cache_device, cache_mode, cache_line_size)
TestRun.fail("Cache started without load or force option.")
except Exception:
TestRun.LOGGER.info(
"Cache did not start without load and force option.")
with TestRun.step("Load cache and stop it with flush."):
cache = casadm.load_cache(cache_device)
cache.stop()
with TestRun.step("Check md5sum of tested file on core device."):
core_device.mount(mount_point)
cas_md5 = test_file.md5sum()
core_device.unmount()
if cas_md5 == file_md5:
TestRun.LOGGER.info(
"Source and target file checksums are identical.")
else:
TestRun.fail("Source and target file checksums are different.")
