def test_surprise_shutdown_stop_cache(pyocf_ctx):
core_device = RamVolume(S.from_MiB(10))
error_triggered = True
error_io_seq_no = 0
io_offset = mngmt_op_surprise_shutdown_test_io_offset
while error_triggered:
# Start cache device without error injection
error_io = {IoDir.WRITE: error_io_seq_no}
device = ErrorDevice(
mngmt_op_surprise_shutdown_test_cache_size, error_seq_no=error_io, armed=False
)
# setup cache and insert some data
cache = Cache.start_on_device(device, cache_mode=CacheMode.WB)
core = Core(device=core_device)
cache.add_core(core)
vol = CoreVolume(core, open=True)
ocf_write(vol, cache.get_default_queue(), 0xAA, io_offset)
# start error injection
device.arm()
try:
cache.stop()
status = OcfErrorCode.OCF_OK
except OcfError as ex:
status = ex.error_code
# if error was injected we expect mngmt op error
error_triggered = device.error_triggered()
if error_triggered:
assert status == OcfErrorCode.OCF_ERR_WRITE_CACHE
else:
assert status == 0
if not error_triggered:
break
# disable error injection and load the cache
device.disarm()
cache = None
assert core_device.get_bytes()[io_offset] == VOLUME_POISON
cache = Cache.load_from_device(device, open_cores=False)
stats = cache.get_stats()
if stats["conf"]["core_count"] == 1:
assert stats["usage"]["occupancy"]["value"] == 1
core = Core(device=core_device)
cache.add_core(core, try_add=True)
vol = CoreVolume(core, open=True)
assert ocf_read(vol, cache.get_default_queue(), io_offset) == 0xAA
cache.stop()
# advance error injection point
error_io_seq_no += 1
def test_surprise_shutdown_cache_reinit(pyocf_ctx):
core_device = RamVolume(S.from_MiB(10))
error_io = {IoDir.WRITE: 0}
io_offset = mngmt_op_surprise_shutdown_test_io_offset
error_triggered = True
while error_triggered:
# Start cache device without error injection
device = ErrorDevice(
mngmt_op_surprise_shutdown_test_cache_size, error_seq_no=error_io, armed=False
)
# start WB
cache = Cache.start_on_device(device, cache_mode=CacheMode.WB)
core = Core(device=core_device)
cache.add_core(core)
vol = CoreVolume(core, open=True)
queue = cache.get_default_queue()
# insert dirty cacheline
ocf_write(vol, queue, 0xAA, io_offset)
cache.stop()
assert core_device.get_bytes()[io_offset] == VOLUME_POISON
# start error injection
device.arm()
# power failure during cache re-initialization
try:
# sets force = True by default
cache = Cache.start_on_device(device, cache_mode=CacheMode.WB)
status = OcfErrorCode.OCF_OK
except OcfError as ex:
status = ex.error_code
cache = None
error_triggered = device.error_triggered()
assert error_triggered == (status == OcfErrorCode.OCF_ERR_WRITE_CACHE)
if cache:
with pytest.raises(OcfError) as ex:
cache.stop()
assert ex.value.error_code == OcfErrorCode.OCF_ERR_WRITE_CACHE
device.disarm()
cache = None
status = OcfErrorCode.OCF_OK
try:
cache = Cache.load_from_device(device)
except OcfError as ex:
status = ex.error_code
if not cache:
assert status == OcfErrorCode.OCF_ERR_NO_METADATA
else:
stats = cache.get_stats()
if stats["conf"]["core_count"] == 0:
assert stats["usage"]["occupancy"]["value"] == 0
cache.add_core(core)
vol = CoreVolume(core, open=True)
assert ocf_read(vol, cache.get_default_queue(), io_offset) == VOLUME_POISON
cache.stop()
error_io[IoDir.WRITE] += 1