> The exact same lock is taken on both sides. There is no unfair advantage to WinFsp. If you design a file system that takes no locks and works on both WinFsp and Dokany, I will be happy to run the tests against that file system.

Alternatively you can show me that there is a lock already taken within Dokany for this purpose (protection of the data structures of the user mode file system) and I will be happy to remove the lock and rerun the tests.