[PATCH v11 07/10] block: introduce BIP_CHECK_GUARD/REFTAG/APPTAG bip_flags

[Christoph Hellwig]

On Mon, Feb 03, 2025 at 08:09:48PM +0530, Anuj Gupta wrote:
> +	if (bi->csum_type == BLK_INTEGRITY_CSUM_IP)
> +		bip->bip_flags |= BIP_IP_CHECKSUM;

I don't think this part will work, but it's a bug since day one of
the nvmet PI support:  NVMe doesn't support IP checksum, but in this
case we'd expect the remoe side to supply it.  So the setup path
needs to check for a support csum type.  I can look into that as a
separate fix.

We'll also need to set the BIP_CHECK_GUARD flag here I think.