storage/usbf: Remove and re-install storage when switching between ho…

…st and target This allows to replace the backing file while it is in host mode and informs the USB gadget about changes to it. Also, the target will not be able to access it anymore while it is in host mode. Signed-off-by: Jan Kiszka <[email protected]>
chombourger · Apr 20, 2022 · b92d55b · b92d55b
1 parent 68dea23
commit b92d55b
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/mtda/storage/usbf.py b/mtda/storage/usbf.py
@@ -94,6 +94,8 @@ def to_host(self):
         self.mtda.debug(3, "storage.usbf.to_host()")
         self.lock.acquire()
 
+        Composite.remove()
+
         self.mode = self.SD_ON_HOST
         result = True
 
@@ -113,6 +115,13 @@ def to_target(self):
         if result is True:
             self.mode = self.SD_ON_TARGET
 
+        if self.file is not None:
+            if os.path.exists(self.file) is True:
+                result = Composite.install()
+            else:
+                self.mtda.debug(1, "storage.usbf.to_target(): "
+                                   "{} not found!".format(self.file))
+
         self.lock.release()
         self.mtda.debug(3, "storage.usbf.to_target(): {}".format(result))
         return result