Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results

Home NTFSD

Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging


The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.


Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/


Set FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS Attribute

gtsanggtsang Member Posts: 4

Hi All,

There are new file attribute FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS for the cloudfile, I tried to use the API "SetFileAttributes", it won't add this file attribute.

Does anyone know how to set this file attribute?

Thanks
George

Comments

  • Jeremy_HurrenJeremy_Hurren Member - All Emails Posts: 29

    That flag is to indicate that the file/dir is not fully present locally. It's used by CldFlt (and OneDrive) and is only settable by Kernel mode callers. I don't think you would typically need to set it, as it seems like that would be better left to CldFlt.sys.

  • gtsanggtsang Member Posts: 4

    Yes, we are developing a HSM mini filter driver, it has similar requirement which doesn't want the anti virus to download our stub files.
    So we need to add that attribute from our filter driver?

    Thanks
    George

  • Jeremy_HurrenJeremy_Hurren Member - All Emails Posts: 29

    Correct. You should be able to set that flag (or create a new file with it) from a kernel mode caller.

Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. Sign in or register to get started.

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Writing WDF Drivers 12 September 2022 Live, Online
Internals & Software Drivers 23 October 2022 Live, Online
Kernel Debugging 14 November 2022 Live, Online
Developing Minifilters 5 December 2022 Live, Online