linux-kernel - Re: [PATCH RFC net-next v5 10/14] virtio/vsock: add VIRTIO_VSOCK_F

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Message-ID: <nnftjp3ek3hpiqlvz6ajbxcjswraclrayei2wi2qwgxzi7gpl6@yxdcz5eknofy>
Date:   Tue, 1 Aug 2023 18:04:46 +0200
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     Bobby Eshleman <bobbyeshleman@...il.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Bobby Eshleman <bobby.eshleman@...edance.com>,
        linux-hyperv@...r.kernel.org,
        Stefan Hajnoczi <stefanha@...hat.com>, kvm@...r.kernel.org,
        VMware PV-Drivers Reviewers <pv-drivers@...are.com>,
        Simon Horman <simon.horman@...igine.com>,
        virtualization@...ts.linux-foundation.org,
        Eric Dumazet <edumazet@...gle.com>,
        Dan Carpenter <dan.carpenter@...aro.org>,
        Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Bryan Tan <bryantan@...are.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Krasnov Arseniy <oxffffaa@...il.com>,
        Vishnu Dasa <vdasa@...are.com>,
        Jiang Wang <jiang.wang@...edance.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH RFC net-next v5 10/14] virtio/vsock: add
 VIRTIO_VSOCK_F_DGRAM feature bit

On Tue, Aug 01, 2023 at 04:30:22AM +0000, Bobby Eshleman wrote:
>On Thu, Jul 27, 2023 at 09:48:21AM +0200, Stefano Garzarella wrote:
>> On Wed, Jul 26, 2023 at 02:38:08PM -0400, Michael S. Tsirkin wrote:
>> > On Wed, Jul 19, 2023 at 12:50:14AM +0000, Bobby Eshleman wrote:
>> > > This commit adds a feature bit for virtio vsock to support datagrams.
>> > >
>> > > Signed-off-by: Jiang Wang <jiang.wang@...edance.com>
>> > > Signed-off-by: Bobby Eshleman <bobby.eshleman@...edance.com>
>> > > ---
>> > >  include/uapi/linux/virtio_vsock.h | 1 +
>> > >  1 file changed, 1 insertion(+)
>> > >
>> > > diff --git a/include/uapi/linux/virtio_vsock.h b/include/uapi/linux/virtio_vsock.h
>> > > index 331be28b1d30..27b4b2b8bf13 100644
>> > > --- a/include/uapi/linux/virtio_vsock.h
>> > > +++ b/include/uapi/linux/virtio_vsock.h
>> > > @@ -40,6 +40,7 @@
>> > >
>> > >  /* The feature bitmap for virtio vsock */
>> > >  #define VIRTIO_VSOCK_F_SEQPACKET	1	/* SOCK_SEQPACKET supported */
>> > > +#define VIRTIO_VSOCK_F_DGRAM		3	/* SOCK_DGRAM supported */
>> > >
>> > >  struct virtio_vsock_config {
>> > >  	__le64 guest_cid;
>> >
>> > pls do not add interface without first getting it accepted in the
>> > virtio spec.
>>
>> Yep, fortunatelly this series is still RFC.
>> I think by now we've seen that the implementation is doable, so we
>> should discuss the changes to the specification ASAP. Then we can
>> merge the series.
>>
>> @Bobby can you start the discussion about spec changes?
>>
>
>No problem at all. Am I right to assume that a new patch to the spec is
>the standard starting point for discussion?

Yep, I think so!

Thanks,
Stefano