FUSE mirror: Hangs when navigating recursively in Explorer

[Rondom]

Environment

• Windows version: Win2K8R2
• Processor architecture: amd64
• Dokany version: 40719844 (build 1.0.1.781)
• Library type (Dokany/FUSE): Cygwin FUSE

  Check List

• [ x ] I checked my issue doesn't exist yet
• [ x ] My issue is valid with mirror default sample and not specific to my user-mode driver implementation
• [ x ] I can always reproduce the issue with the provided description below.
• [ x ] I have updated Dokany to the latest version (https://github.com/dokan-dev/dokany/releases) and have reboot my computer after.

Description

1. Run Cygwin as Admin and run Cygwin mirror to mirror to M:
2. In the explorer, navigate to M:\cygdrive\m\cygdrive (one by one, by double-clicking each folder in the right pane of the explorer Window

Problem: Explorer will hang for a very long time at step 2 until we get a timeout from the Dokan side. Then after dismissing the error from the explorer, one can try again and navigate to M:\cygdrive\m\cygdrive successfully. But then if one wants to navigate further, it hangs again. Even worse, this time the Explorer process will crash :cry:

Logs

fuse_recursive_browsing.txt

[Liryna]

Hi @Rondom ,

Is there a flood of request made ? or do you think there is a deadlock somewhere ?

[Rondom]

This might be related to something else. Please ignore this for now and let me investigate more. UPDATE: The behaviour described below seems to be issue #434. Let's wait until that one is fixed.

I have just tested this on Win 2016 Same behaviour.

1. Manually navigating (as described in the issue description)
2. Entering the path M:\cygdrive\m\cygdrive\m into the Explorer's address bar (Ctrl+L)

3. PowerShell

   cd M:\cygdrive\m\cygdrive
   cd .\M
   dir

As you suspected, there is a flood of requests to individual files in the root of M:, for example

ReadFile: \Cygwin.ico from 155648 len 4096

My suspicion is that this has to do with the . and .. directory entries and how they are interpreted.

[Rondom]

I can still reproduce this.