def test_start_write_first_and_check_mode(pyocf_ctx, mode: CacheMode, cls: CacheLineSize):
"""Test starting cache in different modes with different cache line sizes.
After start check proper cache mode behaviour, starting with write operation.
"""
cache_device = Volume(Size.from_MiB(40))
core_device = Volume(Size.from_MiB(10))
cache = Cache.start_on_device(cache_device, cache_mode=mode, cache_line_size=cls)
core_exported = Core.using_device(core_device)
cache.add_core(core_exported)
logger.info("[STAGE] Initial write to exported object")
cache_device.reset_stats()
core_device.reset_stats()
test_data = Data.from_string("This is test data")
io_to_core(core_exported, test_data, Size.from_sector(1).B)
check_stats_write_empty(core_exported, mode, cls)
logger.info("[STAGE] Read from exported object after initial write")
io_from_exported_object(core_exported, test_data.size, Size.from_sector(1).B)
check_stats_read_after_write(core_exported, mode, cls, True)
logger.info("[STAGE] Write to exported object after read")
cache_device.reset_stats()
core_device.reset_stats()
test_data = Data.from_string("Changed test data")
io_to_core(core_exported, test_data, Size.from_sector(1).B)
check_stats_write_after_read(core_exported, mode, cls)
check_md5_sums(core_exported, mode)
def test_secure_erase_simple_io_cleaning():
"""
Perform simple IO which will trigger WB cleaning. Track all the data from
cleaner (locked) and make sure they are erased and unlocked after use.
1. Start cache in WB mode
2. Write single sector at LBA 0
3. Read whole cache line at LBA 0
4. Assert that 3. triggered cleaning
5. Check if all locked Data copies were erased and unlocked
"""
ctx = OcfCtx(
OcfLib.getInstance(),
b"Security tests ctx",
DefaultLogger(LogLevel.WARN),
DataCopyTracer,
Cleaner,
)
ctx.register_volume_type(RamVolume)
cache_device = RamVolume(S.from_MiB(50))
cache = Cache.start_on_device(cache_device, cache_mode=CacheMode.WB)
core_device = RamVolume(S.from_MiB(100))
core = Core.using_device(core_device)
cache.add_core(core)
vol = CoreVolume(core, open=True)
queue = cache.get_default_queue()
read_data = Data(S.from_sector(1).B)
io = vol.new_io(queue,
S.from_sector(1).B, read_data.size, IoDir.WRITE, 0, 0)
io.set_data(read_data)
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
read_data = Data(S.from_sector(8).B)
io = vol.new_io(queue,
S.from_sector(1).B, read_data.size, IoDir.READ, 0, 0)
io.set_data(read_data)
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
stats = cache.get_stats()
ctx.exit()
assert (len(DataCopyTracer.needs_erase) == 0
), "Not all locked Data instances were secure erased!"
assert (len(DataCopyTracer.locked_instances) == 0
), "Not all locked Data instances were unlocked!"
assert (stats["usage"]["clean"]["value"]) > 0, "Cleaner didn't run!"
def ocf_read(vol, queue, offset):
data = Data(byte_count=512)
comp = OcfCompletion([("error", c_int)])
io = vol.new_io(queue, offset, 512, IoDir.READ, 0, 0)
io.set_data(data)
io.callback = comp.callback
io.submit()
comp.wait()
return data.get_bytes()[0]
def test_partial_hit_promotion(pyocf_ctx):
"""
Check if NHIT promotion policy doesn't prevent partial hits from getting
promoted to cache
1. Create core/cache pair with promotion policy ALWAYS
2. Issue one-sector IO to cache to insert partially valid cache line
3. Set NHIT promotion policy with trigger=0 (always triggered) and high
insertion threshold
4. Issue a request containing partially valid cache line and next cache line
* occupancy should rise - partially hit request should bypass nhit criteria
"""
# Step 1
cache_device = Volume(Size.from_MiB(30))
core_device = Volume(Size.from_MiB(30))
cache = Cache.start_on_device(cache_device)
core = Core.using_device(core_device)
cache.add_core(core)
# Step 2
comp = OcfCompletion([("error", c_int)])
write_data = Data(Size.from_sector(1))
io = core.new_io(cache.get_default_queue(), 0, write_data.size, IoDir.READ, 0, 0)
io.set_data(write_data)
io.callback = comp.callback
io.submit()
comp.wait()
stats = cache.get_stats()
cache_lines = stats["conf"]["size"]
assert stats["usage"]["occupancy"]["value"] == 1
# Step 3
cache.set_promotion_policy(PromotionPolicy.NHIT)
cache.set_promotion_policy_param(
PromotionPolicy.NHIT, NhitParams.TRIGGER_THRESHOLD, 0
)
cache.set_promotion_policy_param(
PromotionPolicy.NHIT, NhitParams.INSERTION_THRESHOLD, 100
)
# Step 4
comp = OcfCompletion([("error", c_int)])
write_data = Data(2 * cache_lines.line_size)
io = core.new_io(cache.get_default_queue(), 0, write_data.size, IoDir.WRITE, 0, 0)
io.set_data(write_data)
io.callback = comp.callback
io.submit()
comp.wait()
stats = cache.get_stats()
assert (
stats["usage"]["occupancy"]["value"] == 2
), "Second cache line should be mapped"
def _io(new_io, queue, address, size, data, offset, direction):
io = new_io(queue, address, size, direction, 0, 0)
if direction == IoDir.READ:
_data = Data.from_bytes(bytes(size))
else:
_data = Data.from_bytes(data, offset, size)
ret = __io(io, queue, address, size, _data, direction)
if not ret and direction == IoDir.READ:
memmove(cast(data, c_void_p).value + offset, _data.handle, size)
return ret
def io_to_exp_obj(vol, queue, address, size, data, offset, direction,
target_ioclass, flags):
io = vol.new_io(queue, address, size, direction, target_ioclass, flags)
if direction == IoDir.READ:
_data = Data.from_bytes(bytes(size))
else:
_data = Data.from_bytes(data, offset, size)
ret = __io(io, queue, address, size, _data, direction)
if not ret and direction == IoDir.READ:
memmove(cast(data, c_void_p).value + offset, _data.handle, size)
return ret
def test_write_size_greater_than_cache(pyocf_ctx, mode: CacheMode,
cls: CacheLineSize):
"""Test if eviction does not occur when IO greater than cache size is submitted.
"""
cache_device = Volume(Size.from_MiB(20))
core_device = Volume(Size.from_MiB(5))
cache = Cache.start_on_device(cache_device,
cache_mode=mode,
cache_line_size=cls)
cache_size = cache.get_stats()['conf']['size']
core_exported = Core.using_device(core_device)
cache.add_core(core_exported)
cache.set_seq_cut_off_policy(SeqCutOffPolicy.NEVER)
valid_io_size = Size.from_B(cache_size.B // 2)
test_data = Data(valid_io_size)
send_io(core_exported, test_data)
stats = core_exported.cache.get_stats()
first_block_sts = stats['block']
first_usage_sts = stats['usage']
pt_writes_first = stats['req']['wr_pt']
assert stats["usage"]["occupancy"]["value"] == (valid_io_size.B / Size.from_KiB(4).B),\
"Occupancy after first IO"
prev_writes_to_core = stats["block"]["core_volume_wr"]["value"]
# Anything below 5 MiB is a valid size (less than core device size)
# Writing over cache size (to the offset above first io) in this case should go
# directly to core and shouldn't trigger eviction
io_size_bigger_than_cache = Size.from_MiB(2)
io_offset = valid_io_size
test_data = Data(io_size_bigger_than_cache)
send_io(core_exported, test_data, io_offset)
if mode is not CacheMode.WT:
# Flush first write
cache.flush()
stats = core_exported.cache.get_stats()
second_block_sts = stats['block']
second_usage_sts = stats['usage']
pt_writes_second = stats['req']['wr_pt']
# Second write shouldn't affect cache and should go directly to core.
# Cache occupancy shouldn't change
# Second IO should go in PT
assert first_usage_sts['occupancy'] == \
second_usage_sts['occupancy']
assert pt_writes_first['value'] == 0
assert pt_writes_second['value'] == 1
assert second_block_sts['cache_volume_wr'][
'value'] == valid_io_size.blocks_4k
assert second_block_sts['core_volume_wr']['value'] == valid_io_size.blocks_4k + \
io_size_bigger_than_cache.blocks_4k
def io_to_exp_obj(core, address, size, data, offset, direction, flags):
vol = core.get_front_volume()
queue = core.cache.get_default_queue()
io = vol.new_io(queue, address, size, direction, 0, flags)
if direction == IoDir.READ:
_data = Data.from_bytes(bytes(size))
else:
_data = Data.from_bytes(data, offset, size)
ret = __io(io, queue, address, size, _data, direction)
if not ret and direction == IoDir.READ:
memmove(cast(data, c_void_p).value + offset, _data.handle, size)
return ret
def fill_cache(cache, fill_ratio):
"""
Helper to fill cache from LBA 0.
TODO:
* make it generic and share across all tests
* reasonable error handling
"""
cache_lines = cache.get_stats()["conf"]["size"]
bytes_to_fill = cache_lines.bytes * fill_ratio
max_io_size = cache.device.get_max_io_size().bytes
ios_to_issue = math.floor(bytes_to_fill / max_io_size)
core = cache.cores[0]
completions = []
for i in range(ios_to_issue):
comp = OcfCompletion([("error", c_int)])
write_data = Data(max_io_size)
io = core.new_io(
cache.get_default_queue(),
i * max_io_size,
write_data.size,
IoDir.WRITE,
0,
0,
)
io.set_data(write_data)
io.callback = comp.callback
completions += [comp]
io.submit()
if bytes_to_fill % max_io_size:
comp = OcfCompletion([("error", c_int)])
write_data = Data(
Size.from_B(bytes_to_fill % max_io_size, sector_aligned=True))
io = core.new_io(
cache.get_default_queue(),
ios_to_issue * max_io_size,
write_data.size,
IoDir.WRITE,
0,
0,
)
io.set_data(write_data)
io.callback = comp.callback
completions += [comp]
io.submit()
for c in completions:
c.wait()
def test_eviction_two_cores(pyocf_ctx, mode: CacheMode, cls: CacheLineSize):
"""Test if eviction works correctly when remapping cachelines between distinct cores."""
cache_device = Volume(Size.from_MiB(20))
core_device1 = Volume(Size.from_MiB(40))
core_device2 = Volume(Size.from_MiB(40))
cache = Cache.start_on_device(cache_device,
cache_mode=mode,
cache_line_size=cls)
cache.set_seq_cut_off_policy(SeqCutOffPolicy.NEVER)
cache_size = cache.get_stats()["conf"]["size"]
core_exported1 = Core.using_device(core_device1, name="core1")
core_exported2 = Core.using_device(core_device2, name="core2")
cache.add_core(core_exported1)
cache.add_core(core_exported2)
valid_io_size = Size.from_B(cache_size.B)
test_data = Data(valid_io_size)
send_io(core_exported1, test_data)
send_io(core_exported2, test_data)
stats1 = core_exported1.get_stats()
stats2 = core_exported2.get_stats()
# IO to the second core should evict all the data from the first core
assert stats1["usage"]["occupancy"]["value"] == 0
assert stats2["usage"]["occupancy"]["value"] == valid_io_size.blocks_4k
def test_10add_remove_with_io(pyocf_ctx):
# Start cache device
cache_device = Volume(S.from_MiB(30))
cache = Cache.start_on_device(cache_device)
# Create core device
core_device = Volume(S.from_MiB(10))
core = Core.using_device(core_device)
# Add and remove core 10 times in a loop with io in between
for i in range(0, 10):
cache.add_core(core)
stats = cache.get_stats()
assert stats["conf"]["core_count"] == 1
write_data = Data.from_string("Test data")
io = core.new_io()
io.set_data(write_data)
io.configure(20, write_data.size, IoDir.WRITE, 0, 0)
io.set_queue(cache.get_default_queue())
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
cache.remove_core(core)
stats = cache.get_stats()
assert stats["conf"]["core_count"] == 0
def test_simple_wt_write(pyocf_ctx):
cache_device = Volume(S.from_MiB(30))
core_device = Volume(S.from_MiB(30))
cache = Cache.start_on_device(cache_device)
core = Core.using_device(core_device)
cache.add_core(core)
cache_device.reset_stats()
core_device.reset_stats()
write_data = Data.from_string("This is test data")
io = core.new_io(cache.get_default_queue(),
S.from_sector(1).B, write_data.size, IoDir.WRITE, 0, 0)
io.set_data(write_data)
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
assert cmpl.results["err"] == 0
assert cache_device.get_stats()[IoDir.WRITE] == 1
stats = cache.get_stats()
assert stats["req"]["wr_full_misses"]["value"] == 1
assert stats["usage"]["occupancy"]["value"] == 1
assert core.exp_obj_md5() == core_device.md5()
cache.stop()
def test_simple_wt_write(pyocf_ctx):
cache_device = Volume(S.from_MiB(100))
core_device = Volume(S.from_MiB(200))
cache = Cache.start_on_device(cache_device)
core = Core.using_device(core_device)
queue = Queue(cache)
cache.add_core(core)
cache_device.reset_stats()
core_device.reset_stats()
write_data = Data.from_string("This is test data")
io = core.new_io()
io.set_data(write_data)
io.configure(20, write_data.size, IoDir.WRITE, 0, 0)
io.set_queue(queue)
io.submit()
assert cache_device.get_stats()[IoDir.WRITE] == 1
stats = cache.get_stats()
assert stats["req"]["wr_full_misses"]["value"] == 1
assert stats["usage"]["occupancy"]["value"] == 1
assert core.exp_obj_md5() == core_device.md5()
def test_start_read_first_and_check_mode(pyocf_ctx, mode: CacheMode,
cls: CacheLineSize):
"""Starting cache in different modes with different cache line sizes.
After start check proper cache mode behaviour, starting with read operation.
"""
cache_device = RamVolume(Size.from_MiB(50))
core_device = RamVolume(Size.from_MiB(5))
cache = Cache.start_on_device(cache_device,
cache_mode=mode,
cache_line_size=cls)
core = Core.using_device(core_device)
cache.add_core(core)
front_vol = CoreVolume(core, open=True)
bottom_vol = core.get_volume()
queue = cache.get_default_queue()
logger.info("[STAGE] Initial write to core device")
test_data = Data.from_string("This is test data")
io_to_core(bottom_vol, queue, test_data, Size.from_sector(1).B)
cache_device.reset_stats()
core_device.reset_stats()
logger.info("[STAGE] Initial read from exported object")
io_from_exported_object(front_vol, queue, test_data.size,
Size.from_sector(1).B)
check_stats_read_empty(core, mode, cls)
logger.info("[STAGE] Write to exported object after initial read")
cache_device.reset_stats()
core_device.reset_stats()
test_data = Data.from_string("Changed test data")
io_to_core(front_vol, queue, test_data, Size.from_sector(1).B)
check_stats_write_after_read(core, mode, cls, True)
logger.info("[STAGE] Read from exported object after write")
io_from_exported_object(front_vol, queue, test_data.size,
Size.from_sector(1).B)
check_stats_read_after_write(core, mode, cls)
check_md5_sums(core, mode)
def ocf_write(vol, queue, val, offset):
data = Data.from_bytes(bytes([val] * 512))
comp = OcfCompletion([("error", c_int)])
io = vol.new_io(queue, offset, 512, IoDir.WRITE, 0, 0)
io.set_data(data)
io.callback = comp.callback
io.submit()
comp.wait()
def test_write_size_greater_than_cache(pyocf_ctx, mode: CacheMode,
cls: CacheLineSize):
"""Test if eviction does not occur when IO greater than cache size is submitted.
"""
cache_device = Volume(
Size.from_MiB(20)) # this gives about 1.375 MiB actual caching space
core_device = Volume(Size.from_MiB(5))
cache = Cache.start_on_device(cache_device,
cache_mode=mode,
cache_line_size=cls)
core_exported = Core.using_device(core_device)
cache.add_core(core_exported)
cache.set_seq_cut_off_policy(SeqCutOffPolicy.NEVER)
valid_io_size = Size.from_KiB(512)
test_data = Data(valid_io_size)
send_io(core_exported, test_data)
stats = core_exported.cache.get_stats()
assert stats["usage"]["occupancy"]["value"] == (valid_io_size.B / Size.from_KiB(4).B),\
"Occupancy after first IO"
prev_writes_to_core = stats["block"]["core_volume_wr"]["value"]
# Anything below 5 MiB is a valid size (less than core device size)
# Writing over 1.375 MiB in this case should go directly to core and shouldn't trigger eviction
io_size_bigger_than_cache = Size.from_MiB(2)
test_data = Data(io_size_bigger_than_cache)
send_io(core_exported, test_data)
stats = core_exported.cache.get_stats()
# Writes from IO greater than cache size should go directly to core
# Writes to core should equal the following:
# Previous writes to core + size written + size cleaned (reads from cache)
assert stats["block"]["core_volume_wr"]["value"] == \
stats["block"]["cache_volume_rd"]["value"] + \
prev_writes_to_core + io_size_bigger_than_cache.B / Size.from_KiB(4).B, \
"Writes to core after second IO"
# Occupancy shouldn't change (no eviction)
assert stats["usage"]["occupancy"]["value"] == (valid_io_size.B / Size.from_KiB(4).B),\
"Occupancy after second IO"
def _io(vol, queue, addr, size, direction, context):
comp = OcfCompletion([("error", c_int)], context=context)
data = Data(size)
io = vol.new_io(queue, addr, size, direction, 0, 0)
io.set_data(data)
io.callback = comp.callback
io.submit()
return comp
def test_load_cache_with_cores(pyocf_ctx, open_cores):
cache_device = RamVolume(S.from_MiB(40))
core_device = RamVolume(S.from_MiB(40))
cache = Cache.start_on_device(cache_device)
core = Core.using_device(core_device, name="test_core")
cache.add_core(core)
vol = CoreVolume(core, open=True)
write_data = Data.from_string("This is test data")
io = vol.new_io(cache.get_default_queue(),
S.from_sector(3).B, write_data.size, IoDir.WRITE, 0, 0)
io.set_data(write_data)
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
cache.stop()
cache = Cache.load_from_device(cache_device, open_cores=open_cores)
if not open_cores:
cache.add_core(core, try_add=True)
else:
core = cache.get_core_by_name("test_core")
vol = CoreVolume(core, open=True)
read_data = Data(write_data.size)
io = vol.new_io(cache.get_default_queue(),
S.from_sector(3).B, read_data.size, IoDir.READ, 0, 0)
io.set_data(read_data)
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
assert read_data.md5() == write_data.md5()
assert vol.md5() == core_device.md5()
def test_neg_size_unaligned(pyocf_ctx, c_uint16_randomize):
"""
Check that write operations are blocked when
IO size is not aligned
"""
vol, queue = prepare_cache_and_core(Size.from_MiB(2))
data = Data(int(Size.from_B(c_uint16_randomize)))
if c_uint16_randomize % 512 != 0:
with pytest.raises(Exception):
vol.new_io(queue, 0, data.size, IoDir.WRITE, 0, 0)
def _io(core, addr, size, direction, context):
comp = OcfCompletion([("error", c_int)], context=context)
data = Data(size)
io = core.new_io(core.cache.get_default_queue(), addr, size, direction, 0,
0)
io.set_data(data)
io.callback = comp.callback
io.submit()
return comp
def test_neg_offset_unaligned(pyocf_ctx, c_int_randomize):
"""
Check that write operations are blocked when
IO offset is not aligned
"""
vol, queue = prepare_cache_and_core(Size.from_MiB(2))
vol = vol.get_front_volume()
data = Data(int(Size.from_KiB(1)))
if c_int_randomize % 512 != 0:
with pytest.raises(Exception):
vol.new_io(queue, c_int_randomize, data.size, IoDir.WRITE, 0, 0)
def test_neg_size_unaligned(pyocf_ctx, c_uint16_randomize):
"""
Check that write operations are blocked when
IO size is not aligned
"""
core = prepare_cache_and_core(Size.from_MiB(2))
data = Data(int(Size.from_B(c_uint16_randomize)))
if c_uint16_randomize % 512 != 0:
with pytest.raises(Exception, match="Failed to create io!"):
core.new_io(core.cache.get_default_queue(), 0, data.size,
IoDir.WRITE, 0, 0)
def _exp_obj_md5(self, read_size):
logging.getLogger("pyocf").warning(
"Reading whole exported object! This disturbs statistics values")
read_buffer_all = Data(self.parent.device.size)
read_buffer = Data(read_size)
position = 0
while position < read_buffer_all.size:
io = self.new_io(self.parent.get_default_queue(), position,
read_size, IoDir.READ, 0, 0)
io.set_data(read_buffer)
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
io.submit()
cmpl.wait()
if cmpl.results["err"]:
raise Exception("Error reading whole exported object")
read_buffer_all.copy(read_buffer, position, 0, read_size)
position += read_size
return read_buffer_all.md5()
def test_secure_erase_simple_io_cleaning():
"""
Perform simple IO which will trigger WB cleaning. Track all the data from
cleaner (locked) and make sure they are erased and unlocked after use.
"""
ctx = OcfCtx(
OcfLib.getInstance(),
b"Security tests ctx",
DefaultLogger(LogLevel.WARN),
DataCopyTracer,
MetadataUpdater,
Cleaner,
)
ctx.register_volume_type(Volume)
cache_device = Volume(S.from_MiB(30))
cache = Cache.start_on_device(cache_device, cache_mode=CacheMode.WB)
core_device = Volume(S.from_MiB(100))
core = Core.using_device(core_device)
cache.add_core(core)
cmpls = []
for i in range(10000):
read_data = Data(S.from_KiB(120))
io = core.new_io()
io.set_data(read_data)
io.configure(
(i * 1259) % int(core_device.size), read_data.size, IoDir.WRITE, 0, 0
)
io.set_queue(cache.get_default_queue())
cmpl = OcfCompletion([("err", c_int)])
io.callback = cmpl.callback
cmpls.append(cmpl)
io.submit()
for c in cmpls:
c.wait()
stats = cache.get_stats()
ctx.exit()
assert (
len(DataCopyTracer.needs_erase) == 0
), "Not all locked Data instances were secure erased!"
assert (
len(DataCopyTracer.locked_instances) == 0
), "Not all locked Data instances were unlocked!"
assert (stats["usage"]["clean"]["value"]) > 0, "Cleaner didn't run!"
def io_from_exported_object(exported_obj: Core, buffer_size: int, offset: int):
read_buffer = Data(buffer_size)
io = exported_obj.new_io(exported_obj.cache.get_default_queue(), offset,
read_buffer.size, IoDir.READ, 0, 0)
io.set_data(read_buffer)
completion = OcfCompletion([("err", c_int)])
io.callback = completion.callback
io.submit()
completion.wait()
assert completion.results["err"] == 0, "IO from exported object completion"
return read_buffer
def io_from_exported_object(vol: Volume, queue: Queue, buffer_size: int,
offset: int):
read_buffer = Data(buffer_size)
io = vol.new_io(queue, offset, read_buffer.size, IoDir.READ, 0, 0)
io.set_data(read_buffer)
completion = OcfCompletion([("err", c_int)])
io.callback = completion.callback
io.submit()
completion.wait()
assert completion.results["err"] == 0, "IO from exported object completion"
return read_buffer
def test_neg_read_too_long_data(pyocf_ctx, c_uint16_randomize):
"""
Check if reading data larger than exported object size is properly blocked
"""
core = prepare_cache_and_core(Size.from_MiB(1))
data = Data(int(Size.from_KiB(c_uint16_randomize)))
completion = io_operation(core, data, IoDir.READ)
if c_uint16_randomize > 1024:
assert completion.results["err"] != 0
else:
assert completion.results["err"] == 0
def test_neg_io_class(pyocf_ctx, c_int_randomize):
"""
Check that IO operations are blocked when IO class
number is not in allowed values {0, ..., 32}
"""
core = prepare_cache_and_core(Size.from_MiB(2))
data = Data(int(Size.from_MiB(1)))
completion = io_operation(core, data, randrange(0, 2), io_class=c_int_randomize)
if 0 <= c_int_randomize <= 32:
assert completion.results["err"] == 0
else:
assert completion.results["err"] != 0
def test_neg_io_direction(pyocf_ctx, c_int_randomize):
"""
Check that IO operations are not executed for unknown IO direction,
that is when IO direction value is not in allowed values {0, 1}
"""
core = prepare_cache_and_core(Size.from_MiB(2))
data = Data(int(Size.from_MiB(1)))
completion = io_operation(core, data, c_int_randomize)
if c_int_randomize in [0, 1]:
assert completion.results["err"] == 0
else:
assert completion.results["err"] != 0
def test_neg_write_offset_outside_of_device(pyocf_ctx, c_int_randomize):
"""
Check that write operations are blocked when
IO offset is located outside of device range
"""
core = prepare_cache_and_core(Size.from_MiB(2))
data = Data(int(Size.from_KiB(1)))
completion = io_operation(core, data, IoDir.WRITE, offset=c_int_randomize)
if 0 <= c_int_randomize <= int(Size.from_MiB(2)) - int(Size.from_KiB(1)):
assert completion.results["err"] == 0
else:
assert completion.results["err"] != 0
