From 384912ed194e43c03ad1cdaa09b0b1e488c34d46 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Mon, 31 Aug 2009 21:08:19 +0000 Subject: net: Add DEVTYPE support for Ethernet based devices The Ethernet framing is used for a lot of devices these days. Most prominent are WiFi and WiMAX based devices. However for userspace application it is important to classify these devices correctly and not only see them as Ethernet devices. The daemons like HAL, DeviceKit or even NetworkManager with udev support tries to do the classification in userspace with a lot trickery and extra system calls. This is not good and actually reaches its limitations. Especially since the kernel does know the type of the Ethernet device it is pretty stupid. To solve this problem the underlying device type needs to be set and then the value will be exported as DEVTYPE via uevents and available within udev. # cat /sys/class/net/wlan0/uevent DEVTYPE=wlan INTERFACE=wlan0 IFINDEX=5 This is similar to subsystems like USB and SCSI that distinguish between hosts, devices, disks, partitions etc. The new SET_NETDEV_DEVTYPE() is a convenience helper to set the actual device type. All device types are free form, but for convenience the same strings as used with RFKILL are choosen. Signed-off-by: Marcel Holtmann Signed-off-by: David S. Miller --- include/linux/netdevice.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index a44118b1b56..65ee1929b2b 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -998,6 +998,12 @@ static inline void *netdev_priv(const struct net_device *dev) */ #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) +/* Set the sysfs device type for the network logical device to allow + * fin grained indentification of different network device types. For + * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. + */ +#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) + /** * netif_napi_add - initialize a napi context * @dev: network device -- cgit v1.2.3-70-g09d2