Re: [dpdk-stable] [PATCH] vfio: fix getting default container

[Shahaf Shuler <shahafs@mellanox.com>]

Monday, November 4, 2019 9:35 PM, David Marchand:
> Subject: Re: [PATCH] vfio: fix getting default container
> 
> On Mon, Nov 4, 2019 at 6:41 PM Anatoly Burakov
> <anatoly.burakov@intel.com> wrote:
> >
> > When requesting DMA mapping to default container, we are meant to
> > supply the RTE_VFIO_DEFAULT_CONTAINER_FD value, however this is not
> > handled correctly by get_vfio_cfg_by_container_fd(), because it only
> > looks at actual fd values and does not check for this special case.
> >
> > Fix it to return default container if the fd requested is the special
> > RTE_VFIO_DEFAULT_CONTAINER_FD value.
> >
> > Fixes: 4f5519ed8349 ("vfio: cleanup getting group fd")
> 
> RTE_VFIO_DEFAULT_CONTAINER_FD has been introduced in 4106d89a18f8
> ("vfio: allow DMA map to the default container") (19.05) as part of the
> rework deprecating rte_vfio_dma_map.
> 
> 
> >
> > Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
> > ---
> >  lib/librte_eal/linux/eal/eal_vfio.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/lib/librte_eal/linux/eal/eal_vfio.c
> > b/lib/librte_eal/linux/eal/eal_vfio.c
> > index d9541b1220..d7887388f9 100644
> > --- a/lib/librte_eal/linux/eal/eal_vfio.c
> > +++ b/lib/librte_eal/linux/eal/eal_vfio.c
> > @@ -412,6 +412,9 @@ get_vfio_cfg_by_container_fd(int container_fd)  {
> >         int i;
> >
> > +       if (container_fd == RTE_VFIO_DEFAULT_CONTAINER_FD)
> > +               return default_vfio_cfg;
> > +
> >         for (i = 0; i < VFIO_MAX_CONTAINERS; i++) {
> >                 if (vfio_cfgs[i].vfio_container_fd == container_fd)
> >                         return &vfio_cfgs[i];
> > --
> > 2.17.1
> 
> Reviewed-by: David Marchand <david.marchand@redhat.com>
> 
> Shahaf, can you review this patch please?
> Thanks.

Looks good. Thanks for spotting this. 
Acked-by: Shahaf Shuler <shahafs@mellanox.com>


> 
> --
> David Marchand