Add support for udev trigger

API.md

@@ -350,6 +350,10 @@ Load host configs from a USB stick.
 }
 ```
 
+- POST `/hardware/trigger`
+
+Trigger an udev reload
+
 ### Home Assistant
 
 - GET `/homeassistant/info`

hassio/addons/addon.py

@@ -471,6 +471,7 @@ class Addon(AddonModel):
         if self.with_audio:
             self.write_asound()
 
+        # Start Add-on
         try:
             await self.instance.run()
         except DockerAPIError:

hassio/api/__init__.py

@@ -101,6 +101,7 @@ class RestAPI(CoreSysAttributes):
             [
                 web.get("/hardware/info", api_hardware.info),
                 web.get("/hardware/audio", api_hardware.audio),
+                web.post("/hardware/trigger", api_hardware.trigger),
             ]
         )
 

hassio/api/hardware.py

@@ -1,5 +1,9 @@
 """Init file for Hass.io hardware RESTful API."""
+import asyncio
 import logging
+from typing import Any, Dict
+
+from aiohttp import web
 
 from .utils import api_process
 from ..const import (
@@ -19,7 +23,7 @@ class APIHardware(CoreSysAttributes):
     """Handle RESTful API for hardware functions."""
 
     @api_process
-    async def info(self, request):
+    async def info(self, request: web.Request) -> Dict[str, Any]:
         """Show hardware info."""
         return {
             ATTR_SERIAL: list(
@@ -32,7 +36,7 @@ class APIHardware(CoreSysAttributes):
         }
 
     @api_process
-    async def audio(self, request):
+    async def audio(self, request: web.Request) -> Dict[str, Any]:
         """Show ALSA audio devices."""
         return {
             ATTR_AUDIO: {
@@ -40,3 +44,8 @@ class APIHardware(CoreSysAttributes):
                 ATTR_OUTPUT: self.sys_host.alsa.output_devices,
             }
         }
+
+    @api_process
+    def trigger(self, request: web.Request) -> None:
+        """Trigger a udev device reload."""
+        return asyncio.shield(self.sys_hardware.udev_trigger())

hassio/api/security.py

@@ -41,6 +41,7 @@ ADDONS_API_BYPASS = re.compile(
     r"^(?:"
     r"|/addons/self/(?!security|update)[^/]+"
     r"|/info"
+    r"|/hardware/.+"
     r"|/services.*"
     r"|/discovery.*"
     r"|/auth"

hassio/misc/hardware.py

@@ -1,4 +1,5 @@
 """Read hardware info from system."""
+import asyncio
 from datetime import datetime
 import logging
 from pathlib import Path
@@ -148,3 +149,11 @@ class Hardware:
             return None
 
         return datetime.utcfromtimestamp(int(found.group(1)))
+
+    async def udev_trigger(self) -> None:
+        """Trigger a udev reload."""
+        proc = await asyncio.create_subprocess_exec("udevadm", "trigger")
+
+        await proc.wait()
+        if proc.returncode != 0:
+            _LOGGER.waring("udevadm device triggering fails!")