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

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Date:   Fri, 13 Nov 2020 16:08:39 +0100
From:   Karsten Graul <kgraul@...ux.ibm.com>
To:     Jakub Kicinski <kuba@...nel.org>
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 11/11/2020 23:34, Jakub Kicinski wrote:
> 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?
> 

Thank you for your valuable comments. We are looking into a better way
to retrieve the various information from the kernel into user space, 
and we will come up with a v5 for that.

-- 
Karsten