netdev - Re: [PATCH-v5 0/4] vsock: cancel connect packets when failing to connect

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Date:   Thu, 16 Mar 2017 15:14:37 +0800
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     Peng Tao <bergwolf@...il.com>
Cc:     David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        Jorgen Hansen <jhansen@...are.com>
Subject: Re: [PATCH-v5 0/4] vsock: cancel connect packets when failing to
 connect

On Wed, Mar 15, 2017 at 09:32:13AM +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.
> 
> v5 changelog:
>   - change virtio_vsock_pkt->cancel_token back to virtio_vsock_pkt->vsk

As discussed previously, it's an opaque token that is not interpreted or
dereferenced.  A unique integer could be used instead of the pointer we
conveniently use as the token today.  I still think it should be void *
or uintptr_t, but let's move on.

Reviewed-by: Stefan Hajnoczi <stefanha@...hat.com>

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