Re: [PATCH v5 1/4] vhost: convert VHOST_VSOCK_SET_RUNNING to a generic ioctl

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Hi Mathieu,

On Wed, Sep 09, 2020 at 04:42:14PM -0600, Mathieu Poirier wrote:
> On Wed, Aug 26, 2020 at 07:46:33PM +0200, Guennadi Liakhovetski wrote:
> > VHOST_VSOCK_SET_RUNNING is used by the vhost vsock driver to perform
> > crucial VirtQueue initialisation, like assigning .private fields and
> > calling vhost_vq_init_access(), and clean up. However, this ioctl is
> > actually extremely useful for any vhost driver, that doesn't have a
> > side channel to inform it of a status change, e.g. upon a guest
> > reboot. This patch makes that ioctl generic, while preserving its
> > numeric value and also keeping the original alias.
> > 
> > Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@xxxxxxxxxxxxxxx>
> > ---
> >  include/uapi/linux/vhost.h | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> > 
> > diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
> > index 75232185324a..11a4948b6216 100644
> > --- a/include/uapi/linux/vhost.h
> > +++ b/include/uapi/linux/vhost.h
> > @@ -97,6 +97,8 @@
> >  #define VHOST_SET_BACKEND_FEATURES _IOW(VHOST_VIRTIO, 0x25, __u64)
> >  #define VHOST_GET_BACKEND_FEATURES _IOR(VHOST_VIRTIO, 0x26, __u64)
> >  
> > +#define VHOST_SET_RUNNING _IOW(VHOST_VIRTIO, 0x61, int)
> > +
> 
> I don't see it used in the next patches and as such should be part of another
> series.

It isn't used in the next patches, it is used in this patch - see below.

Thanks
Guennadi

> >  /* VHOST_NET specific defines */
> >  
> >  /* Attach virtio net ring to a raw socket, or tap device.
> > @@ -118,7 +120,7 @@
> >  /* VHOST_VSOCK specific defines */
> >  
> >  #define VHOST_VSOCK_SET_GUEST_CID	_IOW(VHOST_VIRTIO, 0x60, __u64)
> > -#define VHOST_VSOCK_SET_RUNNING		_IOW(VHOST_VIRTIO, 0x61, int)
> > +#define VHOST_VSOCK_SET_RUNNING		VHOST_SET_RUNNING
> >  
> >  /* VHOST_VDPA specific defines */
> >  
> > -- 
> > 2.28.0
> > 



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