Re: [RFC] fs: add ioctl to query protection info capabilities

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On Mon, Jun 02, 2025 at 11:12:38PM -0400, Martin K. Petersen wrote:
> As a result, the block layer considers the opaque metadata part of the
> PI but it technically isn't. It really should be the other way around:
> The PI is a subset of the metadata.
> 
> It would require quite a bit of rototilling to metadata-ize the block
> layer plumbing at this point. But for a new user API, I do think we
> should try to align with the architecture outlined in the standards.

As in exporting the total metadata size and PI tuple size?





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