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msd: reread device info while writing

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Devaev Maxim
2018-07-03 07:00:17 +03:00
parent 95a5bbb367
commit 67439d6194
1 changed files with 10 additions and 6 deletions
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16
kvmd/kvmd/msd.py
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@@ -61,8 +61,8 @@ class DeviceInfo(NamedTuple):
_DISK_META_SIZE = 4096
_DISK_META_MAGIC_SIZE = 16
_DISK_META_IMAGE_NAME_SIZE = 256
_DISK_META_PADS_SIZE = _DISK_META_SIZE - _DISK_META_IMAGE_NAME_SIZE - _DISK_META_MAGIC_SIZE * 8 * 2
_DISK_META_FORMAT = "%dL%dc%dx%dL" % (
_DISK_META_PADS_SIZE = _DISK_META_SIZE - _DISK_META_IMAGE_NAME_SIZE - _DISK_META_MAGIC_SIZE * 8
_DISK_META_FORMAT = ">%dL%dc%dx%dL" % (
_DISK_META_MAGIC_SIZE,
_DISK_META_IMAGE_NAME_SIZE,
_DISK_META_PADS_SIZE,
@@ -185,10 +185,7 @@ class MassStorageDevice: # pylint: disable=too-many-instance-attributes
# TODO: disable gpio
if not no_delay:
await asyncio.sleep(self.__init_delay)
path = await self.__loop.run_in_executor(None, locate_by_bind, self._bind)
if not path:
raise MassStorageError("Can't locate device by bind %r" % (self._bind))
self.__device_info = await self.__loop.run_in_executor(None, explore_device, path)
await self.__reread_device_info()
get_logger().info("Mass-storage device switched to KVM: %s", self.__device_info)
@_operated_and_locked
@@ -231,6 +228,7 @@ class MassStorageDevice: # pylint: disable=too-many-instance-attributes
await self._device_file.flush()
await self.__loop.run_in_executor(None, os.fsync, self._device_file.fileno())
await self._device_file.seek(0)
await self.__reread_device_info()
async def write_image_chunk(self, chunk: bytes) -> int:
async with self._lock:
@@ -251,6 +249,12 @@ class MassStorageDevice: # pylint: disable=too-many-instance-attributes
async with self._lock:
await self.__close_device_file()
async def __reread_device_info(self) -> None:
path = await self.__loop.run_in_executor(None, locate_by_bind, self._bind)
if not path:
raise MassStorageError("Can't locate device by bind %r" % (self._bind))
self.__device_info = await self.__loop.run_in_executor(None, explore_device, path)
async def __close_device_file(self) -> None:
try:
if self._device_file: