netdev - Re: [PATCH net-next v4 09/15] net/smc: Introduce SMCR get linkgroup command

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Date:   Wed, 11 Nov 2020 14:34:05 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Karsten Graul <kgraul@...ux.ibm.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-s390@...r.kernel.org, hca@...ux.ibm.com, raspl@...ux.ibm.com
Subject: Re: [PATCH net-next v4 09/15] net/smc: Introduce SMCR get linkgroup
 command

On Mon,  9 Nov 2020 16:18:08 +0100 Karsten Graul wrote:
> @@ -295,6 +377,14 @@ static int smc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
>  
>  static int smc_diag_dump_ext(struct sk_buff *skb, struct netlink_callback *cb)
>  {
> +	struct smc_diag_req_v2 *req = nlmsg_data(cb->nlh);
> +
> +	if (req->cmd == SMC_DIAG_GET_LGR_INFO) {
> +		if ((req->cmd_ext & (1 << (SMC_DIAG_LGR_INFO_SMCR - 1))))
> +			smc_diag_fill_lgr_list(smc_diag_ops->get_lgr_list(),
> +					       skb, cb, req);
> +	}
> +
>  	return skb->len;
>  }

IDK if this is appropriate for socket diag handler.

Is there precedent for funneling commands through socket diag instead
of just creating a genetlink family?