[PATCHv2] block: always allocate integrity buffer

[Christoph Hellwig]

On Thu, May 08, 2025 at 10:14:13AM -0600, Keith Busch wrote:
> But since you mention it, maybe someone does want to force PRACT on the
> generic read/write path? I considered it a fallback when the kernel
> doesn't have CONFIG_BLK_DEV_INTEGRITY, but we could control it at
> runtime through these attributes too. It would just need a new flag in
> the blk_integrity profile to say if format supports controller-side
> strip/generation and use that to decide if we need to attach an
> unchecked integrity payload or not.

The generate/verify attributes always were my way to force insert/strip
behavior on both SCSI and NVMe for testing.

But yeah, I never tested the PI + other metadata features where this
might or might not work, and we really do need to fix the attribute
for those.