On Fri, Nov 03, 2017 at 01:53:40PM +0100, Christoph Hellwig wrote: > > - if (ns && ns->ms && > > + if (ns->ms && > > (!ns->pi_type || ns->ms != sizeof(struct t10_pi_tuple)) && > > !blk_integrity_rq(req) && !blk_rq_is_passthrough(req)) > > return BLK_STS_NOTSUPP; > > blk_rq_is_passthrough also can't be true here. > > How about: > > if (ns->ms && !blk_integrity_rq(req) && > (!ns->pi_type || ns->ms != sizeof(struct t10_pi_tuple))) > return BLK_STS_NOTSUPP; > > Although I have to admit I don't really understand what this check > is even trying to do. It basically checks for a namespace that has > a format with metadata that is not T10 protection information and > then rejects all I/O to it. Why are we even creating a block device > node for such a thing?
If the namespace has metadata, but the request doesn't have a metadata payload attached to it for whatever reason, we can't construct the command for that format. We also can't have the controller strip/generate the payload with PRACT bit set if it's not a T10 format, so we just fail the command.
