1 files changed, 55 insertions, 7 deletions

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 90e2177af081..92d6b9467314 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -209,9 +209,44 @@ static ssize_t store_tx_queue_len(struct device *dev,
 	return netdev_store(dev, attr, buf, len, change_tx_queue_len);
 }
 
+static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr,
+			     const char *buf, size_t len)
+{
+	struct net_device *netdev = to_net_dev(dev);
+	size_t count = len;
+	ssize_t ret;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	/* ignore trailing newline */
+	if (len >  0 && buf[len - 1] == '\n')
+		--count;
+
+	rtnl_lock();
+	ret = dev_set_alias(netdev, buf, count);
+	rtnl_unlock();
+
+	return ret < 0 ? ret : len;
+}
+
+static ssize_t show_ifalias(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	const struct net_device *netdev = to_net_dev(dev);
+	ssize_t ret = 0;
+
+	rtnl_lock();
+	if (netdev->ifalias)
+		ret = sprintf(buf, "%s\n", netdev->ifalias);
+	rtnl_unlock();
+	return ret;
+}
+
 static struct device_attribute net_class_attributes[] = {
 	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
 	__ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
+	__ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),
 	__ATTR(iflink, S_IRUGO, show_iflink, NULL),
 	__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
 	__ATTR(features, S_IRUGO, show_features, NULL),
@@ -242,11 +277,11 @@ static ssize_t netstat_show(const struct device *d,
 			offset % sizeof(unsigned long) != 0);
 
 	read_lock(&dev_base_lock);
-	if (dev_isalive(dev) && dev->get_stats &&
-	    (stats = (*dev->get_stats)(dev)))
+	if (dev_isalive(dev)) {
+		stats = dev->get_stats(dev);
 		ret = sprintf(buf, fmt_ulong,
 			      *(unsigned long *)(((u8 *) stats) + offset));
-
+	}
 	read_unlock(&dev_base_lock);
 	return ret;
 }
@@ -318,7 +353,7 @@ static struct attribute_group netstat_group = {
 	.attrs  = netstat_attrs,
 };
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_WIRELESS_EXT_SYSFS
 /* helper function that does all the locking etc for wireless stats */
 static ssize_t wireless_show(struct device *d, char *buf,
 			     ssize_t (*format)(const struct iw_statistics *,
@@ -418,6 +453,7 @@ static void netdev_release(struct device *d)
 
 	BUG_ON(dev->reg_state != NETREG_RELEASED);
 
+	kfree(dev->ifalias);
 	kfree((char *)dev - dev->padded);
 }
 
@@ -457,10 +493,9 @@ int netdev_register_kobject(struct net_device *net)
 	strlcpy(dev->bus_id, net->name, BUS_ID_SIZE);
 
 #ifdef CONFIG_SYSFS
-	if (net->get_stats)
-		*groups++ = &netstat_group;
+	*groups++ = &netstat_group;
 
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_WIRELESS_EXT_SYSFS
 	if (net->wireless_handlers && net->wireless_handlers->get_wireless_stats)
 		*groups++ = &wireless_group;
 #endif
@@ -469,6 +504,19 @@ int netdev_register_kobject(struct net_device *net)
 	return device_add(dev);
 }
 
+int netdev_class_create_file(struct class_attribute *class_attr)
+{
+	return class_create_file(&net_class, class_attr);
+}
+
+void netdev_class_remove_file(struct class_attribute *class_attr)
+{
+	class_remove_file(&net_class, class_attr);
+}
+
+EXPORT_SYMBOL(netdev_class_create_file);
+EXPORT_SYMBOL(netdev_class_remove_file);
+
 void netdev_initialize_kobject(struct net_device *net)
 {
 	struct device *device = &(net->dev);