[dpdk-dev] [RFC PATCH] bus/pci: avoid depending on private value in kernel source

[Tiwei Bie]

On Wed, Jul 03, 2019 at 11:10:21AM +0200, David Marchand wrote:
> 
> On Wed, Jul 3, 2019 at 11:01 AM Tiwei Bie <tiwei.bie at intel.com> wrote:
> 
>     On Wed, Jul 03, 2019 at 10:26:39AM +0200, David Marchand wrote:
>     > This patch breaks the ABI by extending rte_pci_device.
>     > You must rework it to avoid this break.
> 
>     I didn't expect it to be merged in this release. I just want
>     to draw other's attention on this and kick off the discussion
>     (it would be great if you would like to share your thoughts
>     on this). If there is a way to avoid extending rte_pci_device,
>     it would be definitely great. But if we have to break it, then
>     we would want to send out the announce as early as possible.
> 
> 
> What we have here is a vfio private thing, we don't need it to be exposed.
> 
> Did not think it through yet.
> How about having an internal (as in, in the pci driver code) representation of
> the pci devices?
> This internal structure would embed the rte_pci_device exposed to the others
> subsystems and the applications and the vfio code would just get what it wants
> by using offsetof?

I think it's a good idea! I'll give it a try.

Thanks!
Tiwei

> 
> 
> --
> David Marchand