Re: [PATCH 01/10] block: set bip_vcnt correctly

[Keith Busch <kbusch@kernel.org>]

On Sat, Apr 27, 2024 at 09:02:14AM +0200, Christoph Hellwig wrote:
> On Fri, Apr 26, 2024 at 12:09:34AM +0530, Kanchan Joshi wrote:
> > From: Anuj Gupta <anuj20.g@samsung.com>
> > 
> > Set the bip_vcnt correctly in bio_integrity_init_user and
> > bio_integrity_copy_user. If the bio gets split at a later point,
> > this value is required to set the right bip_vcnt in the cloned bio.
> > 
> > Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
> > Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
> 
> Looks good:
> 
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> 
> Please add a Fixes tag and submit it separately from the features.
> 
> I'm actually kinda surprised the direct user mapping of integrity data
> survived so far without this.

The only existing use case for user metadata is REQ_OP_DRV_IN/OUT, which
never splits, so these initial fixes only really matter after this
series adds new usage for generic READ/WRITE.