Re: [PATCH v1 0/4] Add command id quirk for fabrics

[Christoph Hellwig <hch@lst.de>]

On Mon, Nov 08, 2021 at 08:45:11AM -0800, Keith Busch wrote:
> On Mon, Nov 08, 2021 at 04:46:57PM +0200, Max Gurtovoy wrote:
> > Hi all,
> > Commit a2941f6aa71a ("nvme: add command id quirk for apple controllers")
> > was merged to fix a regression in apple controllers that was introduced
> > after merging commit e7006de6c238 ("nvme: code command_id with a genctr
> > for use-after-free validation").
> > 
> > This series is comming to enable the same quirk for fabrics controllers
> > that used the command id index in the same way that was probably used in
> > apple controllers.
> 
> If there really are targets behaving this way, then this looks good and
> necessary, however unfortunate. A TCP target triggered the need for
> valid tag validation in the first place.
> 
> Are there really fabrics targets behaving this way, or is this series
> anticipating they might exist? Apple disregarding specs is nothing new,
> but I would have hoped no other targets would do this since most vendors
> care about interop.

Seconded.  We probably also need to document the broken targers in the
nvme-cli documentation.