linux-kernel - Re: [PATCH net-next 03/15] net/smc: introduce virtual ISM device loopback-ism

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Date: Fri, 16 Feb 2024 15:11:00 +0100
From: Wenjia Zhang <wenjia@...ux.ibm.com>
To: Wen Gu <guwen@...ux.alibaba.com>, wintera@...ux.ibm.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com, agordeev@...ux.ibm.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        jaka@...ux.ibm.com, Gerd Bayer <gbayer@...ux.ibm.com>
Cc: borntraeger@...ux.ibm.com, svens@...ux.ibm.com, alibuda@...ux.alibaba.com,
        tonylu@...ux.alibaba.com, linux-s390@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 03/15] net/smc: introduce virtual ISM device
 loopback-ism



On 11.01.24 13:00, Wen Gu wrote:
> This introduces a kind of virtual ISM device loopback-ism for SMCDv2.1.
> loopback-ism is implemented by software and serves inter-process or
> inter-container SMC communication in the same OS instance. It is created
> during SMC module loading and destroyed upon unloading. The support for
> loopback-ism can be configured via CONFIG_SMC_LO.
> 
> Signed-off-by: Wen Gu <guwen@...ux.alibaba.com>
> ---
>   net/smc/Kconfig        |  13 +++
>   net/smc/Makefile       |   2 +-
>   net/smc/af_smc.c       |  12 ++-
>   net/smc/smc_loopback.c | 181 +++++++++++++++++++++++++++++++++++++++++
>   net/smc/smc_loopback.h |  33 ++++++++
>   5 files changed, 239 insertions(+), 2 deletions(-)
>   create mode 100644 net/smc/smc_loopback.c
>   create mode 100644 net/smc/smc_loopback.h
> 
> diff --git a/net/smc/Kconfig b/net/smc/Kconfig
> index 746be3996768..e191f78551f4 100644
> --- a/net/smc/Kconfig
> +++ b/net/smc/Kconfig
> @@ -20,3 +20,16 @@ config SMC_DIAG
>   	  smcss.
>   
>   	  if unsure, say Y.
> +
> +config SMC_LO
> +	bool "SMC_LO: virtual ISM loopback-ism for SMC"
> +	depends on SMC
> +	default n
> +	help
> +	  SMC_LO provides a kind of virtual ISM device called loopback-ism
Don't forget to update "s/virtual/emulated/" later. ;-)

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