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I'm not sure this is the right place to report this,
When working with the Cloud Filter API, I encountered an issue that only reproduce on Win10 2004.
When user is deleting a 0KB sparse placeholder file, in the CF_CALLBACK_TYPE_NOTIFY_DELETE callback, if passing an unsuccessful CompletionStatus(e.g. STATUS_UNSUCCESSFUL) to the platform, in theory this should fail the user's delete action and prevent the file from being deleted, but on Win10 2004, file got deleted anyway.
On Win10 versions before 2004, it behaves as expected, error message popup, saying "The cloud operation is unsuccessful", and the file is left untouched.
The minimal changes to reproduce this issue based on the official CloudMirror sample can be found at:
https://github.com/wangfu91/Windows-classic-samples/pull/1/files
This seems like a bug of Win10 2004, very much like the ICopyHook bug in Win10 1803.
Thank you for bringing this to our attention. I can reproduce this issue on Windows 10 2004 but it works on 1909. I've reported it internally.
Thanks,
Please also noted that besides the online-only placeholders, partially populated directories are also affected.
If a directory is not fully populated(Can be set using CF_UPDATE_FLAG_ENABLE_ON_DEMAND_POPULATION flag), Set AckDelete.CompletionStatus to STATUS_UNSUCCESSFUL also cannot prevent the deletion on Win10 2004.
Thank you for useful information.
Hi, any updates?
Has this issue been confirmed by the engineering team as a bug?
Any ETA on when the fix will available?
Yes, this issue is confirmed internally and has been reported. Thanks for your contribution. But there is no ETA for a fix. You can monitor Known issues and Resolved issues with public release.
Just tested on the recently released Win10 20H2(19042.572) and the issue persists.
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Hi Rita,
could you pls provide us with an update for Windows 10 when this will be fixed?
A fix in windows 11 will not solve it since a large amount of machines will not immediately update to windows 11 and will stay at 10.
Thanks!
Hi, could you pls provide us with an update on this issue? We could no see a fix in any Win releases until today. Thanks!
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I can reproduce this bug on the latest Windows Home 21H1 19043.1165, cldflt.sys 10.0.19041.1110.
@Rita Han - MSFT How do we report and monitor the status of this issue?
I just tested on Windows 11 (build 10.0.22000.194), it seems this bug has finally been fixed by Microsoft.