How to disable virtual disk renaming?

[stroev-ao]

This does not interfere with the operation of the disk, but from a logical point of view, this should not be possible, since the disk name in my case is set remotely.

[Liryna]

I haven't tried but I am pretty sure this is due to the default sddl (you can find the value in sys/dokan.h) allowing this.
You can set your custom value and deny the rename at mount time with the dokan option field VolumeSecurityDescriptor

[stroev-ao]

I use the InitializeSecurityDescriptor and SetSecurityDescriptorDacl methods from advapi32.dll, get the SECURITY_DESCRIPTOR structure, convert its IntPtr to a byte array and set it to the VolumeSecurityDescriptor field. After that I get an exception when calling DokanBuilder.Build. Am I doing it right?

[Liryna]

Sorry I haven't tried it myself from C# but there is indeed a Marshall allocation issue here

[stroev-ao]

Can you create an c++ example please?

[LTRData]

I use the InitializeSecurityDescriptor and SetSecurityDescriptorDacl methods from advapi32.dll, get the SECURITY_DESCRIPTOR structure, convert its IntPtr to a byte array and set it to the VolumeSecurityDescriptor field. After that I get an exception when calling DokanBuilder.Build. Am I doing it right?

I would strongly suggest that you use .NET model objects for this as far as possible.

        var sec = new FileSecurity();

        sec.AddAccessRule( ... );

        var bytes = sec.GetSecurityDescriptorBinaryForm();

        options.VolumeSecurityDescriptor = bytes;
        options.VolumeSecurityDescriptorLength = bytes.Length;

There could of course still be things that you need to call through P/Invoke depending on what you want to do. But in my experience, that is almost never needed.

Does this help in your case?

[stroev-ao]

Thanks for the advice @LTRData! I tried to do it in .NET model objects but got the same exception. I also tried not setting a value in the VolumeSecurityDescriptorLength field - doesn't matter.

[LTRData]

Could you share some details about the exception you get? What type of exception and if there are any more details in it.

[stroev-ao]

Sure. Exception type is System.ArgumentException. Message: Type could not be marshaled because the length of an embedded array instance does not match the declared length in the layout. Stack trace:
at System.StubHelpers.MngdFixedArrayMarshaler.ConvertSpaceToNative(IntPtr pMarshalState, Object& pManagedHome, IntPtr pNativeHome)
--- End of stack trace from previous location ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Interop.Ole32.CoTaskMemFree(IntPtr ptr)
at System.Runtime.InteropServices.Marshal.StructureToPtr(Object structure, IntPtr ptr, Boolean fDeleteOld)
at System.Runtime.InteropServices.Marshal.StructureToPtr[T](T structure, IntPtr ptr, Boolean fDeleteOld)
at DokanNet.NativeStructWrapper`1..ctor(T obj)
at DokanNet.NativeStructWrapper.Wrap[T](T obj)
at DokanNet.DokanInstance..ctor(ILogger logger, DOKAN_OPTIONS options, IDokanOperations operations)
at DokanNet.DokanInstanceBuilder.Build(IDokanOperations operations)
at MyClass (where DokanBuilder.Build is called).

What other information might help?

[LTRData]

Ah okay I understand. I missed that part. You need to resize the array:
Array.Resize(ref bytes, 16384);

[stroev-ao]

Ah okay I understand. I missed that part. You need to resize the array: Array.Resize(ref bytes, 16384);

Okay, one more exception. Type: DokanException. Message: Can't install the Dokan driver. Stack trace:
at DokanNet.DokanInstance..ctor(ILogger logger, DOKAN_OPTIONS options, IDokanOperations operations)
at DokanNet.DokanInstanceBuilder.Build(IDokanOperations operations)
at MyClass (where DokanBuilder.Build is called).

Am I doing it right?

[LTRData]

Have you installed the Dokan setup package? Did you get any errors when you did that? What does the command sc query dokan2 at command line say?

[stroev-ao]

Have you installed the Dokan setup package? Did you get any errors when you did that? What does the command sc query dokan2 at command line say?

Yes, the Dokan package installed without errors.

The command sc query dokan2 result:

[LTRData]

Strange. Could it be some kind of version mismatch between the native dokan2.dll that gets loaded into your process and Dokan2 driver? I am unsure in this case. It looks like it should have worked.

[stroev-ao]

Strange. Could it be some kind of version mismatch between the native dokan2.dll that gets loaded into your process and Dokan2 driver? I am unsure in this case. It looks like it should have worked.

You were right. The Dokan Library version was 2.0.6.1, the Dokan version from Nuget in my project is 2.0.5.1. I uninstalled Dokan Library 2.0.6.1 then installed Dokan Library 2.0.5.1, but the problem is still there.

[Liryna]

If other C# sample work, it means your install is correct but the provided VolumeSecurity are incorrect and failed the mount.