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Simplified inotify API

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This commit is contained in:
Maxim Devaev 2024-08-25 01:24:12 +03:00
parent 8569ed406a
commit 3837e1a1c8
3 changed files with 23 additions and 9 deletions
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15
kvmd/inotify.py
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@ -142,6 +142,14 @@ class InotifyMask:
| MOVED_TO
)
# Helper for typicals events when we need to restart watcher
ALL_RESTART_EVENTS = (
DELETE_SELF
| MOVE_SELF
| UNMOUNT
| ISDIR
)
# Special flags for watch()
# DONT_FOLLOW = 0x02000000 # Don't follow a symbolic link
# EXCL_UNLINK = 0x04000000 # Exclude events on unlinked objects
@ -172,6 +180,10 @@ class InotifyEvent:
name: str
path: str
@property
def restart(self) -> bool:
return bool(self.mask & InotifyMask.ALL_RESTART_EVENTS)
def __repr__(self) -> str:
return (
f"<InotifyEvent: wd={self.wd}, mask={InotifyMask.to_string(self.mask)},"
@ -190,6 +202,9 @@ class Inotify:
self.__events_queue: "asyncio.Queue[InotifyEvent]" = asyncio.Queue()
async def watch_all_modify(self, *paths: str) -> None:
await self.watch(InotifyMask.ALL_MODIFY_EVENTS, *paths)
async def watch(self, mask: int, *paths: str) -> None:
for path in paths:
path = os.path.normpath(path)

10
kvmd/plugins/msd/otg/__init__.py
View File

@ -30,7 +30,6 @@ from typing import AsyncGenerator
from ....logging import get_logger
from ....inotify import InotifyMask
from ....inotify import Inotify
from ....yamlconf import Option
@ -415,8 +414,8 @@ class Plugin(BaseMsd): # pylint: disable=too-many-instance-attributes
await asyncio.sleep(5)
with Inotify() as inotify:
await inotify.watch(InotifyMask.ALL_MODIFY_EVENTS, *self.__storage.get_watchable_paths())
await inotify.watch(InotifyMask.ALL_MODIFY_EVENTS, *self.__drive.get_watchable_paths())
await inotify.watch_all_modify(*self.__storage.get_watchable_paths())
await inotify.watch_all_modify(*self.__drive.get_watchable_paths())
# После установки вотчеров еще раз проверяем стейт, чтобы ничего не потерять
await self.__reload_state()
@ -426,8 +425,9 @@ class Plugin(BaseMsd): # pylint: disable=too-many-instance-attributes
need_reload_state = False
for event in (await inotify.get_series(timeout=1)):
need_reload_state = True
if event.mask & (InotifyMask.DELETE_SELF | InotifyMask.MOVE_SELF | InotifyMask.UNMOUNT | InotifyMask.ISDIR):
# Если выгрузили OTG, изменили каталоги, что-то отмонтировали или делают еще какую-то странную фигню
if event.restart:
# Если выгрузили OTG, изменили каталоги, что-то отмонтировали или делают еще какую-то странную фигню.
# Проверяется маска InotifyMask.ALL_RESTART_EVENTS
logger.info("Got a big inotify event: %s; reinitializing MSD ...", event)
need_restart = True
break

7
kvmd/plugins/ugpio/otgconf.py
View File

@ -28,7 +28,6 @@ from typing import Any
from ...logging import get_logger
from ...inotify import InotifyMask
from ...inotify import Inotify
from ... import aiotools
@ -82,15 +81,15 @@ class Plugin(BaseUserGpioDriver):
await asyncio.sleep(5)
with Inotify() as inotify:
await inotify.watch(InotifyMask.ALL_MODIFY_EVENTS, os.path.dirname(self.__udc_path))
await inotify.watch(InotifyMask.ALL_MODIFY_EVENTS, self.__profile_path)
await inotify.watch_all_modify(os.path.dirname(self.__udc_path))
await inotify.watch_all_modify(self.__profile_path)
self._notifier.notify()
while True:
need_restart = False
need_notify = False
for event in (await inotify.get_series(timeout=1)):
need_notify = True
if event.mask & (InotifyMask.DELETE_SELF | InotifyMask.MOVE_SELF | InotifyMask.UNMOUNT):
if event.restart:
logger.warning("Got fatal inotify event: %s; reinitializing OTG-bind ...", event)
need_restart = True
break