netdev - Re: [PATCH v3 0/4] vsock: cancel connect packets when failing to connect

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Date:   Fri, 9 Dec 2016 10:18:42 +0000
From:   Stefan Hajnoczi <stefanha@...il.com>
To:     Peng Tao <bergwolf@...il.com>
Cc:     Stefan Hajnoczi <stefanha@...hat.com>, netdev@...r.kernel.org,
        Jorgen Hansen <jhansen@...are.com>,
        David Miller <davem@...emloft.net>, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v3 0/4] vsock: cancel connect packets when failing to
 connect

On Fri, Dec 09, 2016 at 01:12:32AM +0800, Peng Tao wrote:
> Currently, if a connect call fails on a signal or timeout (e.g., guest is still
> in the process of starting up), we'll just return to caller and leave the connect
> packet queued and they are sent even though the connection is considered a failure,
> which can confuse applications with unwanted false connect attempt.
> 
> The patchset enables vsock (both host and guest) to cancel queued packets when
> a connect attempt is considered to fail.
> 
> v3 changelog:
>   - define cancel_pkt callback in struct vsock_transport rather than struct virtio_transport
>   - rename virtio_vsock_pkt->vsk to virtio_vsock_pkt->cancel_token
> v2 changelog:
>   - fix queued_replies counting and resume tx/rx when necessary
> 
> 
> Peng Tao (4):
>   vsock: track pkt owner vsock
>   vhost-vsock: add pkt cancel capability
>   vsock: add pkt cancel capability
>   vsock: cancel packets when failing to connect
> 
>  drivers/vhost/vsock.c                   | 41 ++++++++++++++++++++++++++++++++
>  include/linux/virtio_vsock.h            |  2 ++
>  include/net/af_vsock.h                  |  3 +++
>  net/vmw_vsock/af_vsock.c                | 14 +++++++++++
>  net/vmw_vsock/virtio_transport.c        | 42 +++++++++++++++++++++++++++++++++
>  net/vmw_vsock/virtio_transport_common.c |  7 ++++++
>  6 files changed, 109 insertions(+)

I'm happy although I pointed out two unnecessary (void*) casts.

Please wait for Jorgen to go happy on the af_vsock.c changes before
applying.

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