From ff80e519ab1b3a6abb2c6bbf684b98be07111879 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Mon, 29 Jul 2013 18:16:51 +0200 Subject: [PATCH] net: export physical port id via sysfs Signed-off-by: Jiri Pirko Acked-by: Ben Hutchings Signed-off-by: Narendra K Signed-off-by: David S. Miller --- net/core/net-sysfs.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 981fed397d1d..8826b0d1e0cc 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -334,6 +334,27 @@ static ssize_t store_group(struct device *dev, struct device_attribute *attr, return netdev_store(dev, attr, buf, len, change_group); } +static ssize_t show_phys_port_id(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 struct device_attribute net_class_attributes[] = { __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), @@ -355,6 +376,7 @@ static struct device_attribute net_class_attributes[] = { __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, store_tx_queue_len), __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), + __ATTR(phys_port_id, S_IRUGO, show_phys_port_id, NULL), {} }; -- 2.20.1