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 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 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 _read(self, offset=0, size=0):
if size == 0:
size = self.get_length().B - offset
exp_obj_io = self.__alloc_io(offset, size, IoDir.READ, 0, 0)
completion = OcfCompletion([("err", c_int)])
exp_obj_io.callback = completion
data = Data.from_bytes(bytes(size))
exp_obj_io.set_data(data)
exp_obj_io.submit()
completion.wait()
error = completion.results["err"]
if error:
raise Exception("error reading exported object for dump")
return data