netdev - Re: [PATCH rdma-next v3 09/13] RDMA/nldev: Allow optional-counter status configuration through RDMA netlink

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Date:   Thu, 7 Oct 2021 10:07:48 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Doug Ledford <dledford@...hat.com>,
        Aharon Landau <aharonl@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        Gal Pressman <galpress@...zon.com>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, Maor Gottlieb <maorg@...dia.com>,
        Mark Zhang <markzhang@...dia.com>,
        Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
        Mustafa Ismail <mustafa.ismail@...el.com>,
        Neta Ostrovsky <netao@...dia.com>, netdev@...r.kernel.org,
        Potnuri Bharat Teja <bharat@...lsio.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Selvin Xavier <selvin.xavier@...adcom.com>,
        Shiraz Saleem <shiraz.saleem@...el.com>,
        Yishai Hadas <yishaih@...dia.com>,
        Zhu Yanjun <zyjzyj2000@...il.com>
Subject: Re: [PATCH rdma-next v3 09/13] RDMA/nldev: Allow optional-counter
 status configuration through RDMA netlink

On Wed, Oct 06, 2021 at 12:52:12PM +0300, Leon Romanovsky wrote:

> @@ -1986,11 +2030,13 @@ static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
>  		goto end;
>  	}
>  
> -	if (!tb[RDMA_NLDEV_ATTR_STAT_MODE]) {
> +	if (tb[RDMA_NLDEV_ATTR_STAT_MODE])
> +		ret = nldev_stat_set_mode_doit(skb, nlh, extack, tb, device,
> +					       port);
> +	else if (tb[RDMA_NLDEV_ATTR_STAT_HWCOUNTER_DYNAMIC])
> +		ret = nldev_stat_set_counter_dynamic_doit(tb, device, port);
> +	else
>  		ret = -EINVAL;
> -		goto end;
> -	}

I missed this before.. Why is this exclusive?

If userspace sends both inputs then both should be set.

And shouldn't this reject NL attributes it doesn't support - eg
shouldn't this have a stat_set policy to check that?

Jason