linux-kernel - Re: [RFC] net: hsr: Provide RedBox support

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Date: Wed, 28 Feb 2024 18:03:00 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Stephen Hemminger <stephen@...workplumber.org>
Cc: Lukasz Majewski <lukma@...x.de>,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
	Tristram.Ha@...rochip.com,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Paolo Abeni <pabeni@...hat.com>,
	Ravi Gunasekaran <r-gunasekaran@...com>,
	Simon Horman <horms@...nel.org>,
	Wojciech Drewek <wojciech.drewek@...el.com>,
	Nikita Zhandarovich <n.zhandarovich@...tech.ru>,
	Murali Karicheri <m-karicheri2@...com>,
	Dan Carpenter <dan.carpenter@...aro.org>,
	Ziyang Xuan <william.xuanziyang@...wei.com>,
	Kristian Overskeid <koverskeid@...il.com>,
	Matthieu Baerts <matttbe@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC] net: hsr: Provide RedBox support

On Wed, Feb 28, 2024 at 08:31:15AM -0800, Stephen Hemminger wrote:
> On Wed, 28 Feb 2024 16:07:35 +0100
> Lukasz Majewski <lukma@...x.de> wrote:
> 
> >  
> > +/* hsr_proxy_node_table_show - Formats and prints proxy node_table entries */
> > +static int
> > +hsr_proxy_node_table_show(struct seq_file *sfp, void *data)
> > +{
> > +	struct hsr_priv *priv = (struct hsr_priv *)sfp->private;
> > +	struct hsr_node *node;
> > +
> > +	seq_printf(sfp, "Proxy Node Table entries for HSR device\n");
> > +	seq_puts(sfp, "MAC-Address-SAN,        time_in\n");
> > +	rcu_read_lock();
> > +	list_for_each_entry_rcu(node, &priv->proxy_node_db, mac_list) {
> > +		seq_printf(sfp, "%pM ", &node->macaddress_A[0]);
> > +		seq_printf(sfp, "%10lx\n", node->time_in[HSR_PT_INTERLINK]);
> > +	}
> > +	rcu_read_unlock();
> > +	return 0;
> > +}
> > +
> >  DEFINE_SHOW_ATTRIBUTE(hsr_node_table);
> > +DEFINE_SHOW_ATTRIBUTE(hsr_proxy_node_table);
> 
> NAK
> Do not abuse sysfs to be a debug proc style output.

This is actually debugfs, not sysfs.

However, i agree, we want information like this exported via netlink
as the primary interface to the end user. debugfs is not suitable for
that.

	 Andrew