netdev - Re: [patch net-next v3 06/17] net-sysfs: expose physical switch id for particular device

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Date:	Tue, 25 Nov 2014 10:28:37 -0500
From:	Andy Gospodarek <gospo@...ulusnetworks.com>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, nhorman@...driver.com,
	andy@...yhouse.net, tgraf@...g.ch, dborkman@...hat.com,
	ogerlitz@...lanox.com, jesse@...ira.com, pshelar@...ira.com,
	azhou@...ira.com, ben@...adent.org.uk, stephen@...workplumber.org,
	jeffrey.t.kirsher@...el.com, vyasevic@...hat.com,
	xiyou.wangcong@...il.com, john.r.fastabend@...el.com,
	edumazet@...gle.com, jhs@...atatu.com, sfeldma@...il.com,
	f.fainelli@...il.com, roopa@...ulusnetworks.com,
	linville@...driver.com, jasowang@...hat.com, ebiederm@...ssion.com,
	nicolas.dichtel@...nd.com, ryazanov.s.a@...il.com,
	buytenh@...tstofly.org, aviadr@...lanox.com, nbd@...nwrt.org,
	alexei.starovoitov@...il.com, Neil.Jerram@...aswitch.com,
	ronye@...lanox.com, simon.horman@...ronome.com,
	alexander.h.duyck@...hat.com, john.ronciak@...el.com,
	mleitner@...hat.com, shrijeet@...il.com, bcrl@...ck.org
Subject: Re: [patch net-next v3 06/17] net-sysfs: expose physical switch id
 for particular device

On Tue, Nov 25, 2014 at 11:28:37AM +0100, Jiri Pirko wrote:
> Signed-off-by: Jiri Pirko <jiri@...nulli.us>
> Reviewed-by: Thomas Graf <tgraf@...g.ch>
> Acked-by: John Fastabend <john.r.fastabend@...el.com>

Acked-by: Andy Gospodarek <gospo@...ulusnetworks.com>

> ---
> v2->v3:
> -changed "sw" string to "switch" to avoid confusion
> v1->v2:
> -no change
> ---
>  net/core/net-sysfs.c | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
> index 26c46f4..9993412 100644
> --- a/net/core/net-sysfs.c
> +++ b/net/core/net-sysfs.c
> @@ -12,6 +12,7 @@
>  #include <linux/capability.h>
>  #include <linux/kernel.h>
>  #include <linux/netdevice.h>
> +#include <net/switchdev.h>
>  #include <linux/if_arp.h>
>  #include <linux/slab.h>
>  #include <linux/nsproxy.h>
> @@ -416,6 +417,28 @@ static ssize_t phys_port_id_show(struct device *dev,
>  }
>  static DEVICE_ATTR_RO(phys_port_id);
>  
> +static ssize_t phys_switch_id_show(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct net_device *netdev = to_net_dev(dev);
> +	ssize_t ret = -EINVAL;
> +
> +	if (!rtnl_trylock())
> +		return restart_syscall();
> +
> +	if (dev_isalive(netdev)) {
> +		struct netdev_phys_item_id ppid;
> +
> +		ret = netdev_switch_parent_id_get(netdev, &ppid);
> +		if (!ret)
> +			ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id);
> +	}
> +	rtnl_unlock();
> +
> +	return ret;
> +}
> +static DEVICE_ATTR_RO(phys_switch_id);
> +
>  static struct attribute *net_class_attrs[] = {
>  	&dev_attr_netdev_group.attr,
>  	&dev_attr_type.attr,
> @@ -441,6 +464,7 @@ static struct attribute *net_class_attrs[] = {
>  	&dev_attr_tx_queue_len.attr,
>  	&dev_attr_gro_flush_timeout.attr,
>  	&dev_attr_phys_port_id.attr,
> +	&dev_attr_phys_switch_id.attr,
>  	NULL,
>  };
>  ATTRIBUTE_GROUPS(net_class);
> -- 
> 1.9.3
> 
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