Re: Immutable vs read-only for Windows compatibility

[Christoph Hellwig]

On Fri, Jan 17, 2025 at 12:21:12PM -0800, Darrick J. Wong wrote:
> > Full disclosure - I have an out of tree xfs patch that implements
> > ioctls XFS_IOC_[GS]ETDOSATTRAT and stashes these
> > attributes in the unused di_dmevmask space.
> 
> [cc linux-xfs]
> 
> Urrrrk, please don't fork the xfs ondisk format!

Yeah, adding your own bits to any file system on-disk format is a huge
no-go.