netdev - Re: [RFC] net: hsr: Provide RedBox support

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Date: Thu, 29 Feb 2024 10:25:57 +0100
From: Lukasz Majewski <lukma@...x.de>
To: Andrew Lunn <andrew@...n.ch>
Cc: Stephen Hemminger <stephen@...workplumber.org>, 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

Hi Andrew,

> 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.

Am I correct, that recommended approach would be to:

1. Modify iproute2 to support for example:

ip addr show dev hsr1 nodes {proxy} ?

2. Shall the currently exported:

/sys/kernel/debug/hsr/hsrX/node_table be left as it is (for legacy
usage) or shall it be removed and replaced with netlink and iproute2 ?

> 
> 	 Andrew

Best regards,

Lukasz Majewski

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