linux-kernel - Re: [PATCH net-next v2 2/2] net/smc: align the connect behaviour with TCP

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Message-ID: <ba81cf0c-08c5-76e9-bfc8-369887454e52@linux.ibm.com>
Date:   Thu, 12 May 2022 14:08:23 +0200
From:   Karsten Graul <kgraul@...ux.ibm.com>
To:     Guangguan Wang <guangguan.wang@...ux.alibaba.com>,
        davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        tonylu@...ux.alibaba.com
Cc:     linux-s390@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 2/2] net/smc: align the connect behaviour with
 TCP

On 12/05/2022 05:11, Guangguan Wang wrote:
> Connect with O_NONBLOCK will not be completed immediately
> and returns -EINPROGRESS. It is possible to use selector/poll
> for completion by selecting the socket for writing. After select
> indicates writability, a second connect function call will return
> 0 to indicate connected successfully as TCP does, but smc returns
> -EISCONN. Use socket state for smc to indicate connect state, which
> can help smc aligning the connect behaviour with TCP.
> 
> Signed-off-by: Guangguan Wang <guangguan.wang@...ux.alibaba.com>
> ---

Acked-by: Karsten Graul <kgraul@...ux.ibm.com>

Thank you.