Subject: Re: [PATCH v1] net-sysfs: expose permanent hardware address in sysfs

From: Florian Fainelli <[email-masked]>
Date: Tue, 06 May 2014 22:24:49 -0700

Le 05/05/2014 20:34, David Decotigny a écrit :
> Tested:
>    grep . /sys/class/net/*/*addr*

Please also include the relevant sysfs documentation changes in 
Documentation/ABI/testing/sysfs-class-net.

Thanks!

>
> Signed-off-by: David Decotigny <[email-masked]>
> ---
>   net/core/net-sysfs.c | 15 +++++++++++++++
>   1 file changed, 15 insertions(+)
>
> diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
> index 1cac29e..bf57024 100644
> --- a/net/core/net-sysfs.c
> +++ b/net/core/net-sysfs.c
> @@ -127,6 +127,20 @@ static ssize_t address_show(struct device *dev, struct device_attribute *attr,
>   }
>   static DEVICE_ATTR_RO(address);
>
> +static ssize_t perm_addr_show(struct device *dev, struct device_attribute *attr,
> +			      char *buf)
> +{
> +	struct net_device *net = to_net_dev(dev);
> +	ssize_t ret = -EINVAL;
> +
> +	read_lock(&dev_base_lock);
> +	if (dev_isalive(net))
> +		ret = sysfs_format_mac(buf, net->perm_addr, net->addr_len);
> +	read_unlock(&dev_base_lock);
> +	return ret;
> +}
> +static DEVICE_ATTR_RO(perm_addr);
> +
>   static ssize_t broadcast_show(struct device *dev,
>   			      struct device_attribute *attr, char *buf)
>   {
> @@ -391,6 +405,7 @@ static struct attribute *net_class_attrs[] = {
>   	&dev_attr_addr_len.attr,
>   	&dev_attr_link_mode.attr,
>   	&dev_attr_address.attr,
> +	&dev_attr_perm_addr.attr,
>   	&dev_attr_broadcast.attr,
>   	&dev_attr_speed.attr,
>   	&dev_attr_duplex.attr,
>