diff options
Diffstat (limited to 'net/core/net-sysfs.c')
| -rw-r--r-- | net/core/net-sysfs.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 707c3134ddf2..3f40ea9de814 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -347,6 +347,28 @@ static ssize_t group_store(struct device *dev, struct device_attribute *attr, NETDEVICE_SHOW(group, fmt_dec); static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store); +static ssize_t phys_port_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_port_id ppid; + + ret = dev_get_phys_port_id(netdev, &ppid); + if (!ret) + ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); + } + rtnl_unlock(); + + return ret; +} +static DEVICE_ATTR_RO(phys_port_id); + static struct attribute *net_class_attrs[] = { &dev_attr_netdev_group.attr, &dev_attr_type.attr, @@ -367,6 +389,7 @@ static struct attribute *net_class_attrs[] = { &dev_attr_mtu.attr, &dev_attr_flags.attr, &dev_attr_tx_queue_len.attr, + &dev_attr_phys_port_id.attr, NULL, }; ATTRIBUTE_GROUPS(net_class); |