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

Christoph,

quoted

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?

Yep. An alternative would be to have uapi defines for the PI tuple size
given each of the checksum types. But I do think it is clearer to make
the sizes explicit in the returned struct.

-- 
Martin K. Petersen