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authorDavid Ahern <dsahern@gmail.com>2015-03-18 05:23:15 +0300
committerDavid S. Miller <davem@davemloft.net>2015-03-19 05:30:35 +0300
commitdb24a9044ee191c397dcd1c6574f56d67d7c8df5 (patch)
tree5d15e7aed127d9c211b5b2dc2d69607cef0d6d8d /net/core/net-sysfs.c
parent56ef9c909b40483d2c8cb63fcbf83865f162d5ec (diff)
downloadlinux-db24a9044ee191c397dcd1c6574f56d67d7c8df5.tar.xz
net: add support for phys_port_name
Similar to port id allow netdevices to specify port names and export the name via sysfs. Drivers can implement the netdevice operation to assist udev in having sane default names for the devices using the rule: $ cat /etc/udev/rules.d/80-net-setup-link.rules SUBSYSTEM=="net", ACTION=="add", ATTR{phys_port_name}!="", NAME="$attr{phys_port_name}" Use of phys_name versus phys_id was suggested-by Jiri Pirko. Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: Jiri Pirko <jiri@resnulli.us> Acked-by: Scott Feldman <sfeldma@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/net-sysfs.c')
-rw-r--r--net/core/net-sysfs.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 7e58bd7ec232..cc5cf689809c 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -418,6 +418,28 @@ static ssize_t phys_port_id_show(struct device *dev,
}
static DEVICE_ATTR_RO(phys_port_id);
+static ssize_t phys_port_name_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)) {
+ char name[IFNAMSIZ];
+
+ ret = dev_get_phys_port_name(netdev, name, sizeof(name));
+ if (!ret)
+ ret = sprintf(buf, "%s\n", name);
+ }
+ rtnl_unlock();
+
+ return ret;
+}
+static DEVICE_ATTR_RO(phys_port_name);
+
static ssize_t phys_switch_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -465,6 +487,7 @@ 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_port_name.attr,
&dev_attr_phys_switch_id.attr,
NULL,
};